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         __be32 dst_ipaddr = htonl(dst_ip);
1524
1525         rt = ip_route_output(&init_net, dst_ipaddr, nesvnic->local_ipaddr, 0, 0);
1526         if (IS_ERR(rt)) {
1527                 printk(KERN_ERR "%s: ip_route_output_key failed for 0x%08X\n",
1528                        __func__, dst_ip);
1529                 return rc;
1530         }
1531
1532         if (netif_is_bond_slave(nesvnic->netdev))
1533                 netdev = netdev_master_upper_dev_get(nesvnic->netdev);
1534         else
1535                 netdev = nesvnic->netdev;
1536
1537         neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr);
1538
1539         rcu_read_lock();
1540         if (neigh) {
1541                 if (neigh->nud_state & NUD_VALID) {
1542                         nes_debug(NES_DBG_CM, "Neighbor MAC address for 0x%08X"
1543                                   " is %pM, Gateway is 0x%08X \n", dst_ip,
1544                                   neigh->ha, ntohl(rt->rt_gateway));
1545
1546                         if (arpindex >= 0) {
1547                                 if (ether_addr_equal(nesadapter->arp_table[arpindex].mac_addr, neigh->ha)) {
1548                                         /* Mac address same as in nes_arp_table */
1549                                         goto out;
1550                                 }
1551
1552                                 nes_manage_arp_cache(nesvnic->netdev,
1553                                                      nesadapter->arp_table[arpindex].mac_addr,
1554                                                      dst_ip, NES_ARP_DELETE);
1555                         }
1556
1557                         nes_manage_arp_cache(nesvnic->netdev, neigh->ha,
1558                                              dst_ip, NES_ARP_ADD);
1559                         rc = nes_arp_table(nesvnic->nesdev, dst_ip, NULL,
1560                                            NES_ARP_RESOLVE);
1561                 } else {
1562                         neigh_event_send(neigh, NULL);
1563                 }
1564         }
1565 out:
1566         rcu_read_unlock();
1567
1568         if (neigh)
1569                 neigh_release(neigh);
1570
1571         ip_rt_put(rt);
1572         return rc;
1573 }
1574
1575 /**
1576  * make_cm_node - create a new instance of a cm node
1577  */
1578 static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
1579                                         struct nes_vnic *nesvnic, struct nes_cm_info *cm_info,
1580                                         struct nes_cm_listener *listener)
1581 {
1582         struct nes_cm_node *cm_node;
1583         struct timespec ts;
1584         int oldarpindex = 0;
1585         int arpindex = 0;
1586         struct nes_device *nesdev;
1587         struct nes_adapter *nesadapter;
1588
1589         /* create an hte and cm_node for this instance */
1590         cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
1591         if (!cm_node)
1592                 return NULL;
1593
1594         /* set our node specific transport info */
1595         if (listener) {
1596                 cm_node->loc_addr = listener->loc_addr;
1597                 cm_node->loc_port = listener->loc_port;
1598         } else {
1599                 cm_node->loc_addr = cm_info->loc_addr;
1600                 cm_node->loc_port = cm_info->loc_port;
1601         }
1602         cm_node->rem_addr = cm_info->rem_addr;
1603         cm_node->rem_port = cm_info->rem_port;
1604
1605         cm_node->mapped_loc_addr = cm_info->mapped_loc_addr;
1606         cm_node->mapped_rem_addr = cm_info->mapped_rem_addr;
1607         cm_node->mapped_loc_port = cm_info->mapped_loc_port;
1608         cm_node->mapped_rem_port = cm_info->mapped_rem_port;
1609
1610         cm_node->mpa_frame_rev = mpa_version;
1611         cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
1612         cm_node->mpav2_ird_ord = 0;
1613         cm_node->ird_size = 0;
1614         cm_node->ord_size = 0;
1615
1616         nes_debug(NES_DBG_CM, "Make node addresses : loc = %pI4:%x, rem = %pI4:%x\n",
1617                   &cm_node->loc_addr, cm_node->loc_port,
1618                   &cm_node->rem_addr, cm_node->rem_port);
1619         cm_node->listener = listener;
1620         if (listener)
1621                 cm_node->tos = listener->tos;
1622         cm_node->netdev = nesvnic->netdev;
1623         cm_node->cm_id = cm_info->cm_id;
1624         memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN);
1625
1626         nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", cm_node->listener,
1627                   cm_node->cm_id);
1628
1629         spin_lock_init(&cm_node->retrans_list_lock);
1630
1631         cm_node->loopbackpartner = NULL;
1632         atomic_set(&cm_node->ref_count, 1);
1633         /* associate our parent CM core */
1634         cm_node->cm_core = cm_core;
1635         cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID;
1636         cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1637         cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >>
1638                                      NES_CM_DEFAULT_RCV_WND_SCALE;
1639         ts = current_kernel_time();
1640         cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
1641         cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
1642                                  sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN;
1643         cm_node->tcp_cntxt.rcv_nxt = 0;
1644         /* get a unique session ID , add thread_id to an upcounter to handle race */
1645         atomic_inc(&cm_core->node_cnt);
1646         cm_node->conn_type = cm_info->conn_type;
1647         cm_node->apbvt_set = 0;
1648         cm_node->accept_pend = 0;
1649
1650         cm_node->nesvnic = nesvnic;
1651         /* get some device handles, for arp lookup */
1652         nesdev = nesvnic->nesdev;
1653         nesadapter = nesdev->nesadapter;
1654
1655         cm_node->loopbackpartner = NULL;
1656
1657         /* get the mac addr for the remote node */
1658         oldarpindex = nes_arp_table(nesdev, cm_node->mapped_rem_addr,
1659                                 NULL, NES_ARP_RESOLVE);
1660         arpindex = nes_addr_resolve_neigh(nesvnic,
1661                                 cm_node->mapped_rem_addr, oldarpindex);
1662         if (arpindex < 0) {
1663                 kfree(cm_node);
1664                 return NULL;
1665         }
1666
1667         /* copy the mac addr to node context */
1668         memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN);
1669         nes_debug(NES_DBG_CM, "Remote mac addr from arp table: %pM\n",
1670                   cm_node->rem_mac);
1671
1672         add_hte_node(cm_core, cm_node);
1673         atomic_inc(&cm_nodes_created);
1674
1675         return cm_node;
1676 }
1677
1678
1679 /**
1680  * add_ref_cm_node - destroy an instance of a cm node
1681  */
1682 static int add_ref_cm_node(struct nes_cm_node *cm_node)
1683 {
1684         atomic_inc(&cm_node->ref_count);
1685         return 0;
1686 }
1687
1688
1689 /**
1690  * rem_ref_cm_node - destroy an instance of a cm node
1691  */
1692 static int rem_ref_cm_node(struct nes_cm_core *cm_core,
1693                            struct nes_cm_node *cm_node)
1694 {
1695         unsigned long flags;
1696         struct nes_qp *nesqp;
1697
1698         if (!cm_node)
1699                 return -EINVAL;
1700
1701         spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
1702         if (atomic_dec_return(&cm_node->ref_count)) {
1703                 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1704                 return 0;
1705         }
1706         list_del(&cm_node->list);
1707         atomic_dec(&cm_core->ht_node_cnt);
1708         spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1709
1710         /* if the node is destroyed before connection was accelerated */
1711         if (!cm_node->accelerated && cm_node->accept_pend) {
1712                 BUG_ON(!cm_node->listener);
1713                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1714                 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1715         }
1716         WARN_ON(cm_node->send_entry);
1717         if (cm_node->recv_entry)
1718                 handle_recv_entry(cm_node, 0);
1719         if (cm_node->listener) {
1720                 mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0);
1721         } else {
1722                 if (cm_node->apbvt_set && cm_node->nesvnic) {
1723                         nes_manage_apbvt(cm_node->nesvnic, cm_node->mapped_loc_port,
1724                                          PCI_FUNC(cm_node->nesvnic->nesdev->pcidev->devfn),
1725                                          NES_MANAGE_APBVT_DEL);
1726                 }
1727                 nes_debug(NES_DBG_NLMSG, "Delete APBVT mapped_loc_port = %04X\n",
1728                                         cm_node->mapped_loc_port);
1729                 nes_remove_mapinfo(cm_node->loc_addr, cm_node->loc_port,
1730                         cm_node->mapped_loc_addr, cm_node->mapped_loc_port);
1731         }
1732
1733         atomic_dec(&cm_core->node_cnt);
1734         atomic_inc(&cm_nodes_destroyed);
1735         nesqp = cm_node->nesqp;
1736         if (nesqp) {
1737                 nesqp->cm_node = NULL;
1738                 nes_rem_ref(&nesqp->ibqp);
1739                 cm_node->nesqp = NULL;
1740         }
1741
1742         kfree(cm_node);
1743         return 0;
1744 }
1745
1746 /**
1747  * process_options
1748  */
1749 static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc,
1750                            u32 optionsize, u32 syn_packet)
1751 {
1752         u32 tmp;
1753         u32 offset = 0;
1754         union all_known_options *all_options;
1755         char got_mss_option = 0;
1756
1757         while (offset < optionsize) {
1758                 all_options = (union all_known_options *)(optionsloc + offset);
1759                 switch (all_options->as_base.optionnum) {
1760                 case OPTION_NUMBER_END:
1761                         offset = optionsize;
1762                         break;
1763                 case OPTION_NUMBER_NONE:
1764                         offset += 1;
1765                         continue;
1766                 case OPTION_NUMBER_MSS:
1767                         nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d "
1768                                   "Size: %d\n", __func__,
1769                                   all_options->as_mss.length, offset, optionsize);
1770                         got_mss_option = 1;
1771                         if (all_options->as_mss.length != 4) {
1772                                 return 1;
1773                         } else {
1774                                 tmp = ntohs(all_options->as_mss.mss);
1775                                 if (tmp > 0 && tmp <
1776                                     cm_node->tcp_cntxt.mss)
1777                                         cm_node->tcp_cntxt.mss = tmp;
1778                         }
1779                         break;
1780                 case OPTION_NUMBER_WINDOW_SCALE:
1781                         cm_node->tcp_cntxt.snd_wscale =
1782                                 all_options->as_windowscale.shiftcount;
1783                         break;
1784                 default:
1785                         nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n",
1786                                   all_options->as_base.optionnum);
1787                         break;
1788                 }
1789                 offset += all_options->as_base.length;
1790         }
1791         if ((!got_mss_option) && (syn_packet))
1792                 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1793         return 0;
1794 }
1795
1796 static void drop_packet(struct sk_buff *skb)
1797 {
1798         atomic_inc(&cm_accel_dropped_pkts);
1799         dev_kfree_skb_any(skb);
1800 }
1801
1802 static void handle_fin_pkt(struct nes_cm_node *cm_node)
1803 {
1804         nes_debug(NES_DBG_CM, "Received FIN, cm_node = %p, state = %u. "
1805                   "refcnt=%d\n", cm_node, cm_node->state,
1806                   atomic_read(&cm_node->ref_count));
1807         switch (cm_node->state) {
1808         case NES_CM_STATE_SYN_RCVD:
1809         case NES_CM_STATE_SYN_SENT:
1810         case NES_CM_STATE_ESTABLISHED:
1811         case NES_CM_STATE_MPAREJ_RCVD:
1812                 cm_node->tcp_cntxt.rcv_nxt++;
1813                 cleanup_retrans_entry(cm_node);
1814                 cm_node->state = NES_CM_STATE_LAST_ACK;
1815                 send_fin(cm_node, NULL);
1816                 break;
1817         case NES_CM_STATE_MPAREQ_SENT:
1818                 create_event(cm_node, NES_CM_EVENT_ABORTED);
1819                 cm_node->tcp_cntxt.rcv_nxt++;
1820                 cleanup_retrans_entry(cm_node);
1821                 cm_node->state = NES_CM_STATE_CLOSED;
1822                 add_ref_cm_node(cm_node);
1823                 send_reset(cm_node, NULL);
1824                 break;
1825         case NES_CM_STATE_FIN_WAIT1:
1826                 cm_node->tcp_cntxt.rcv_nxt++;
1827                 cleanup_retrans_entry(cm_node);
1828                 cm_node->state = NES_CM_STATE_CLOSING;
1829                 send_ack(cm_node, NULL);
1830                 /* Wait for ACK as this is simultaneous close..
1831                 * After we receive ACK, do not send anything..
1832                 * Just rm the node.. Done.. */
1833                 break;
1834         case NES_CM_STATE_FIN_WAIT2:
1835                 cm_node->tcp_cntxt.rcv_nxt++;
1836                 cleanup_retrans_entry(cm_node);
1837                 cm_node->state = NES_CM_STATE_TIME_WAIT;
1838                 send_ack(cm_node, NULL);
1839                 schedule_nes_timer(cm_node, NULL,  NES_TIMER_TYPE_CLOSE, 1, 0);
1840                 break;
1841         case NES_CM_STATE_TIME_WAIT:
1842                 cm_node->tcp_cntxt.rcv_nxt++;
1843                 cleanup_retrans_entry(cm_node);
1844                 cm_node->state = NES_CM_STATE_CLOSED;
1845                 rem_ref_cm_node(cm_node->cm_core, cm_node);
1846                 break;
1847         case NES_CM_STATE_TSA:
1848         default:
1849                 nes_debug(NES_DBG_CM, "Error Rcvd FIN for node-%p state = %d\n",
1850                         cm_node, cm_node->state);
1851                 break;
1852         }
1853 }
1854
1855
1856 static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1857         struct tcphdr *tcph)
1858 {
1859
1860         int     reset = 0;      /* whether to send reset in case of err.. */
1861         atomic_inc(&cm_resets_recvd);
1862         nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u."
1863                         " refcnt=%d\n", cm_node, cm_node->state,
1864                         atomic_read(&cm_node->ref_count));
1865         cleanup_retrans_entry(cm_node);
1866         switch (cm_node->state) {
1867         case NES_CM_STATE_SYN_SENT:
1868         case NES_CM_STATE_MPAREQ_SENT:
1869                 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1870                         "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1871                         cm_node->listener, cm_node->state);
1872                 switch (cm_node->mpa_frame_rev) {
1873                 case IETF_MPA_V2:
1874                         cm_node->mpa_frame_rev = IETF_MPA_V1;
1875                         /* send a syn and goto syn sent state */
1876                         cm_node->state = NES_CM_STATE_SYN_SENT;
1877                         if (send_syn(cm_node, 0, NULL)) {
1878                                 active_open_err(cm_node, skb, reset);
1879                         }
1880                         break;
1881                 case IETF_MPA_V1:
1882                 default:
1883                         active_open_err(cm_node, skb, reset);
1884                         break;
1885                 }
1886                 break;
1887         case NES_CM_STATE_MPAREQ_RCVD:
1888                 atomic_inc(&cm_node->passive_state);
1889                 dev_kfree_skb_any(skb);
1890                 break;
1891         case NES_CM_STATE_ESTABLISHED:
1892         case NES_CM_STATE_SYN_RCVD:
1893         case NES_CM_STATE_LISTENING:
1894                 nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__);
1895                 passive_open_err(cm_node, skb, reset);
1896                 break;
1897         case NES_CM_STATE_TSA:
1898                 active_open_err(cm_node, skb, reset);
1899                 break;
1900         case NES_CM_STATE_CLOSED:
1901                 drop_packet(skb);
1902                 break;
1903         case NES_CM_STATE_FIN_WAIT2:
1904         case NES_CM_STATE_FIN_WAIT1:
1905         case NES_CM_STATE_LAST_ACK:
1906                 cm_node->cm_id->rem_ref(cm_node->cm_id);
1907         case NES_CM_STATE_TIME_WAIT:
1908                 cm_node->state = NES_CM_STATE_CLOSED;
1909                 rem_ref_cm_node(cm_node->cm_core, cm_node);
1910                 drop_packet(skb);
1911                 break;
1912         default:
1913                 drop_packet(skb);
1914                 break;
1915         }
1916 }
1917
1918
1919 static void handle_rcv_mpa(struct nes_cm_node *cm_node, struct sk_buff *skb)
1920 {
1921         int ret = 0;
1922         int datasize = skb->len;
1923         u8 *dataloc = skb->data;
1924
1925         enum nes_cm_event_type type = NES_CM_EVENT_UNKNOWN;
1926         u32 res_type;
1927
1928         ret = parse_mpa(cm_node, dataloc, &res_type, datasize);
1929         if (ret) {
1930                 nes_debug(NES_DBG_CM, "didn't like MPA Request\n");
1931                 if (cm_node->state == NES_CM_STATE_MPAREQ_SENT) {
1932                         nes_debug(NES_DBG_CM, "%s[%u] create abort for "
1933                                   "cm_node=%p listener=%p state=%d\n", __func__,
1934                                   __LINE__, cm_node, cm_node->listener,
1935                                   cm_node->state);
1936                         active_open_err(cm_node, skb, 1);
1937                 } else {
1938                         passive_open_err(cm_node, skb, 1);
1939                 }
1940                 return;
1941         }
1942
1943         switch (cm_node->state) {
1944         case NES_CM_STATE_ESTABLISHED:
1945                 if (res_type == NES_MPA_REQUEST_REJECT)
1946                         /*BIG problem as we are receiving the MPA.. So should
1947                          * not be REJECT.. This is Passive Open.. We can
1948                          * only receive it Reject for Active Open...*/
1949                         WARN_ON(1);
1950                 cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1951                 type = NES_CM_EVENT_MPA_REQ;
1952                 atomic_set(&cm_node->passive_state,
1953                            NES_PASSIVE_STATE_INDICATED);
1954                 break;
1955         case NES_CM_STATE_MPAREQ_SENT:
1956                 cleanup_retrans_entry(cm_node);
1957                 if (res_type == NES_MPA_REQUEST_REJECT) {
1958                         type = NES_CM_EVENT_MPA_REJECT;
1959                         cm_node->state = NES_CM_STATE_MPAREJ_RCVD;
1960                 } else {
1961                         type = NES_CM_EVENT_CONNECTED;
1962                         cm_node->state = NES_CM_STATE_TSA;
1963                 }
1964
1965                 break;
1966         default:
1967                 WARN_ON(1);
1968                 break;
1969         }
1970         dev_kfree_skb_any(skb);
1971         create_event(cm_node, type);
1972 }
1973
1974 static void indicate_pkt_err(struct nes_cm_node *cm_node, struct sk_buff *skb)
1975 {
1976         switch (cm_node->state) {
1977         case NES_CM_STATE_SYN_SENT:
1978         case NES_CM_STATE_MPAREQ_SENT:
1979                 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1980                           "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1981                           cm_node->listener, cm_node->state);
1982                 active_open_err(cm_node, skb, 1);
1983                 break;
1984         case NES_CM_STATE_ESTABLISHED:
1985         case NES_CM_STATE_SYN_RCVD:
1986                 passive_open_err(cm_node, skb, 1);
1987                 break;
1988         case NES_CM_STATE_TSA:
1989         default:
1990                 drop_packet(skb);
1991         }
1992 }
1993
1994 static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1995                      struct sk_buff *skb)
1996 {
1997         int err;
1998
1999         err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num)) ? 0 : 1;
2000         if (err)
2001                 active_open_err(cm_node, skb, 1);
2002
2003         return err;
2004 }
2005
2006 static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph,
2007                      struct sk_buff *skb)
2008 {
2009         int err = 0;
2010         u32 seq;
2011         u32 ack_seq;
2012         u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
2013         u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
2014         u32 rcv_wnd;
2015
2016         seq = ntohl(tcph->seq);
2017         ack_seq = ntohl(tcph->ack_seq);
2018         rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
2019         if (ack_seq != loc_seq_num)
2020                 err = 1;
2021         else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
2022                 err = 1;
2023         if (err) {
2024                 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
2025                           "listener=%p state=%d\n", __func__, __LINE__, cm_node,
2026                           cm_node->listener, cm_node->state);
2027                 indicate_pkt_err(cm_node, skb);
2028                 nes_debug(NES_DBG_CM, "seq ERROR cm_node =%p seq=0x%08X "
2029                           "rcv_nxt=0x%08X rcv_wnd=0x%x\n", cm_node, seq, rcv_nxt,
2030                           rcv_wnd);
2031         }
2032         return err;
2033 }
2034
2035 /*
2036  * handle_syn_pkt() is for Passive node. The syn packet is received when a node
2037  * is created with a listener or it may comein as rexmitted packet which in
2038  * that case will be just dropped.
2039  */
2040 static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
2041                            struct tcphdr *tcph)
2042 {
2043         int ret;
2044         u32 inc_sequence;
2045         int optionsize;
2046
2047         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2048         skb_trim(skb, 0);
2049         inc_sequence = ntohl(tcph->seq);
2050
2051         switch (cm_node->state) {
2052         case NES_CM_STATE_SYN_SENT:
2053         case NES_CM_STATE_MPAREQ_SENT:
2054                 /* Rcvd syn on active open connection*/
2055                 active_open_err(cm_node, skb, 1);
2056                 break;
2057         case NES_CM_STATE_LISTENING:
2058                 /* Passive OPEN */
2059                 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
2060                     cm_node->listener->backlog) {
2061                         nes_debug(NES_DBG_CM, "drop syn due to backlog "
2062                                   "pressure \n");
2063                         cm_backlog_drops++;
2064                         passive_open_err(cm_node, skb, 0);
2065                         break;
2066                 }
2067                 ret = handle_tcp_options(cm_node, tcph, skb, optionsize,
2068                                          1);
2069                 if (ret) {
2070                         passive_open_err(cm_node, skb, 0);
2071                         /* drop pkt */
2072                         break;
2073                 }
2074                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2075                 BUG_ON(cm_node->send_entry);
2076                 cm_node->accept_pend = 1;
2077                 atomic_inc(&cm_node->listener->pend_accepts_cnt);
2078
2079                 cm_node->state = NES_CM_STATE_SYN_RCVD;
2080                 send_syn(cm_node, 1, skb);
2081                 break;
2082         case NES_CM_STATE_CLOSED:
2083                 cleanup_retrans_entry(cm_node);
2084                 add_ref_cm_node(cm_node);
2085                 send_reset(cm_node, skb);
2086                 break;
2087         case NES_CM_STATE_TSA:
2088         case NES_CM_STATE_ESTABLISHED:
2089         case NES_CM_STATE_FIN_WAIT1:
2090         case NES_CM_STATE_FIN_WAIT2:
2091         case NES_CM_STATE_MPAREQ_RCVD:
2092         case NES_CM_STATE_LAST_ACK:
2093         case NES_CM_STATE_CLOSING:
2094         case NES_CM_STATE_UNKNOWN:
2095         default:
2096                 drop_packet(skb);
2097                 break;
2098         }
2099 }
2100
2101 static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
2102                               struct tcphdr *tcph)
2103 {
2104         int ret;
2105         u32 inc_sequence;
2106         int optionsize;
2107
2108         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2109         skb_trim(skb, 0);
2110         inc_sequence = ntohl(tcph->seq);
2111         switch (cm_node->state) {
2112         case NES_CM_STATE_SYN_SENT:
2113                 cleanup_retrans_entry(cm_node);
2114                 /* active open */
2115                 if (check_syn(cm_node, tcph, skb))
2116                         return;
2117                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2118                 /* setup options */
2119                 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0);
2120                 if (ret) {
2121                         nes_debug(NES_DBG_CM, "cm_node=%p tcp_options failed\n",
2122                                   cm_node);
2123                         break;
2124                 }
2125                 cleanup_retrans_entry(cm_node);
2126                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2127                 send_mpa_request(cm_node, skb);
2128                 cm_node->state = NES_CM_STATE_MPAREQ_SENT;
2129                 break;
2130         case NES_CM_STATE_MPAREQ_RCVD:
2131                 /* passive open, so should not be here */
2132                 passive_open_err(cm_node, skb, 1);
2133                 break;
2134         case NES_CM_STATE_LISTENING:
2135                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2136                 cleanup_retrans_entry(cm_node);
2137                 cm_node->state = NES_CM_STATE_CLOSED;
2138                 send_reset(cm_node, skb);
2139                 break;
2140         case NES_CM_STATE_CLOSED:
2141                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2142                 cleanup_retrans_entry(cm_node);
2143                 add_ref_cm_node(cm_node);
2144                 send_reset(cm_node, skb);
2145                 break;
2146         case NES_CM_STATE_ESTABLISHED:
2147         case NES_CM_STATE_FIN_WAIT1:
2148         case NES_CM_STATE_FIN_WAIT2:
2149         case NES_CM_STATE_LAST_ACK:
2150         case NES_CM_STATE_TSA:
2151         case NES_CM_STATE_CLOSING:
2152         case NES_CM_STATE_UNKNOWN:
2153         case NES_CM_STATE_MPAREQ_SENT:
2154         default:
2155                 drop_packet(skb);
2156                 break;
2157         }
2158 }
2159
2160 static int handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
2161                           struct tcphdr *tcph)
2162 {
2163         int datasize = 0;
2164         u32 inc_sequence;
2165         int ret = 0;
2166         int optionsize;
2167
2168         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2169
2170         if (check_seq(cm_node, tcph, skb))
2171                 return -EINVAL;
2172
2173         skb_pull(skb, tcph->doff << 2);
2174         inc_sequence = ntohl(tcph->seq);
2175         datasize = skb->len;
2176         switch (cm_node->state) {
2177         case NES_CM_STATE_SYN_RCVD:
2178                 /* Passive OPEN */
2179                 cleanup_retrans_entry(cm_node);
2180                 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 1);
2181                 if (ret)
2182                         break;
2183                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2184                 cm_node->state = NES_CM_STATE_ESTABLISHED;
2185                 if (datasize) {
2186                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2187                         nes_get_remote_addr(cm_node);
2188                         handle_rcv_mpa(cm_node, skb);
2189                 } else { /* rcvd ACK only */
2190                         dev_kfree_skb_any(skb);
2191                 }
2192                 break;
2193         case NES_CM_STATE_ESTABLISHED:
2194                 /* Passive OPEN */
2195                 cleanup_retrans_entry(cm_node);
2196                 if (datasize) {
2197                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2198                         handle_rcv_mpa(cm_node, skb);
2199                 } else {
2200                         drop_packet(skb);
2201                 }
2202                 break;
2203         case NES_CM_STATE_MPAREQ_SENT:
2204                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2205                 if (datasize) {
2206                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2207                         handle_rcv_mpa(cm_node, skb);
2208                 } else { /* Could be just an ack pkt.. */
2209                         dev_kfree_skb_any(skb);
2210                 }
2211                 break;
2212         case NES_CM_STATE_LISTENING:
2213                 cleanup_retrans_entry(cm_node);
2214                 cm_node->state = NES_CM_STATE_CLOSED;
2215                 send_reset(cm_node, skb);
2216                 break;
2217         case NES_CM_STATE_CLOSED:
2218                 cleanup_retrans_entry(cm_node);
2219                 add_ref_cm_node(cm_node);
2220                 send_reset(cm_node, skb);
2221                 break;
2222         case NES_CM_STATE_LAST_ACK:
2223         case NES_CM_STATE_CLOSING:
2224                 cleanup_retrans_entry(cm_node);
2225                 cm_node->state = NES_CM_STATE_CLOSED;
2226                 cm_node->cm_id->rem_ref(cm_node->cm_id);
2227                 rem_ref_cm_node(cm_node->cm_core, cm_node);
2228                 drop_packet(skb);
2229                 break;
2230         case NES_CM_STATE_FIN_WAIT1:
2231                 cleanup_retrans_entry(cm_node);
2232                 drop_packet(skb);
2233                 cm_node->state = NES_CM_STATE_FIN_WAIT2;
2234                 break;
2235         case NES_CM_STATE_SYN_SENT:
2236         case NES_CM_STATE_FIN_WAIT2:
2237         case NES_CM_STATE_TSA:
2238         case NES_CM_STATE_MPAREQ_RCVD:
2239         case NES_CM_STATE_UNKNOWN:
2240         default:
2241                 cleanup_retrans_entry(cm_node);
2242                 drop_packet(skb);
2243                 break;
2244         }
2245         return ret;
2246 }
2247
2248
2249
2250 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
2251                               struct sk_buff *skb, int optionsize, int passive)
2252 {
2253         u8 *optionsloc = (u8 *)&tcph[1];
2254
2255         if (optionsize) {
2256                 if (process_options(cm_node, optionsloc, optionsize,
2257                                     (u32)tcph->syn)) {
2258                         nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n",
2259                                   __func__, cm_node);
2260                         if (passive)
2261                                 passive_open_err(cm_node, skb, 1);
2262                         else
2263                                 active_open_err(cm_node, skb, 1);
2264                         return 1;
2265                 }
2266         }
2267
2268         cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
2269                                      cm_node->tcp_cntxt.snd_wscale;
2270
2271         if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
2272                 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
2273         return 0;
2274 }
2275
2276 /*
2277  * active_open_err() will send reset() if flag set..
2278  * It will also send ABORT event.
2279  */
2280 static void active_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
2281                             int reset)
2282 {
2283         cleanup_retrans_entry(cm_node);
2284         if (reset) {
2285                 nes_debug(NES_DBG_CM, "ERROR active err called for cm_node=%p, "
2286                           "state=%d\n", cm_node, cm_node->state);
2287                 add_ref_cm_node(cm_node);
2288                 send_reset(cm_node, skb);
2289         } else {
2290                 dev_kfree_skb_any(skb);
2291         }
2292
2293         cm_node->state = NES_CM_STATE_CLOSED;
2294         create_event(cm_node, NES_CM_EVENT_ABORTED);
2295 }
2296
2297 /*
2298  * passive_open_err() will either do a reset() or will free up the skb and
2299  * remove the cm_node.
2300  */
2301 static void passive_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
2302                              int reset)
2303 {
2304         cleanup_retrans_entry(cm_node);
2305         cm_node->state = NES_CM_STATE_CLOSED;
2306         if (reset) {
2307                 nes_debug(NES_DBG_CM, "passive_open_err sending RST for "
2308                           "cm_node=%p state =%d\n", cm_node, cm_node->state);
2309                 send_reset(cm_node, skb);
2310         } else {
2311                 dev_kfree_skb_any(skb);
2312                 rem_ref_cm_node(cm_node->cm_core, cm_node);
2313         }
2314 }
2315
2316 /*
2317  * free_retrans_entry() routines assumes that the retrans_list_lock has
2318  * been acquired before calling.
2319  */
2320 static void free_retrans_entry(struct nes_cm_node *cm_node)
2321 {
2322         struct nes_timer_entry *send_entry;
2323
2324         send_entry = cm_node->send_entry;
2325         if (send_entry) {
2326                 cm_node->send_entry = NULL;
2327                 dev_kfree_skb_any(send_entry->skb);
2328                 kfree(send_entry);
2329                 rem_ref_cm_node(cm_node->cm_core, cm_node);
2330         }
2331 }
2332
2333 static void cleanup_retrans_entry(struct nes_cm_node *cm_node)
2334 {
2335         unsigned long flags;
2336
2337         spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
2338         free_retrans_entry(cm_node);
2339         spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
2340 }
2341
2342 /**
2343  * process_packet
2344  * Returns skb if to be freed, else it will return NULL if already used..
2345  */
2346 static void process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb,
2347                            struct nes_cm_core *cm_core)
2348 {
2349         enum nes_tcpip_pkt_type pkt_type = NES_PKT_TYPE_UNKNOWN;
2350         struct tcphdr *tcph = tcp_hdr(skb);
2351         u32 fin_set = 0;
2352         int ret = 0;
2353
2354         skb_pull(skb, ip_hdr(skb)->ihl << 2);
2355
2356         nes_debug(NES_DBG_CM, "process_packet: cm_node=%p state =%d syn=%d "
2357                   "ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn,
2358                   tcph->ack, tcph->rst, tcph->fin);
2359
2360         if (tcph->rst) {
2361                 pkt_type = NES_PKT_TYPE_RST;
2362         } else if (tcph->syn) {
2363                 pkt_type = NES_PKT_TYPE_SYN;
2364                 if (tcph->ack)
2365                         pkt_type = NES_PKT_TYPE_SYNACK;
2366         } else if (tcph->ack) {
2367                 pkt_type = NES_PKT_TYPE_ACK;
2368         }
2369         if (tcph->fin)
2370                 fin_set = 1;
2371
2372         switch (pkt_type) {
2373         case NES_PKT_TYPE_SYN:
2374                 handle_syn_pkt(cm_node, skb, tcph);
2375                 break;
2376         case NES_PKT_TYPE_SYNACK:
2377                 handle_synack_pkt(cm_node, skb, tcph);
2378                 break;
2379         case NES_PKT_TYPE_ACK:
2380                 ret = handle_ack_pkt(cm_node, skb, tcph);
2381                 if (fin_set && !ret)
2382                         handle_fin_pkt(cm_node);
2383                 break;
2384         case NES_PKT_TYPE_RST:
2385                 handle_rst_pkt(cm_node, skb, tcph);
2386                 break;
2387         default:
2388                 if ((fin_set) && (!check_seq(cm_node, tcph, skb)))
2389                         handle_fin_pkt(cm_node);
2390                 drop_packet(skb);
2391                 break;
2392         }
2393 }
2394
2395 /**
2396  * mini_cm_listen - create a listen node with params
2397  */
2398 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
2399                         struct nes_vnic *nesvnic, struct nes_cm_info *cm_info)
2400 {
2401         struct nes_cm_listener *listener;
2402         struct iwpm_dev_data pm_reg_msg;
2403         struct iwpm_sa_data pm_msg;
2404         unsigned long flags;
2405         int iwpm_err = 0;
2406
2407         nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n",
2408                   cm_info->loc_addr, cm_info->loc_port);
2409
2410         /* cannot have multiple matching listeners */
2411         listener = find_listener(cm_core, cm_info->loc_addr, cm_info->loc_port,
2412                                 NES_CM_LISTENER_EITHER_STATE, 1);
2413
2414         if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) {
2415                 /* find automatically incs ref count ??? */
2416                 atomic_dec(&listener->ref_count);
2417                 nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n");
2418                 return NULL;
2419         }
2420
2421         if (!listener) {
2422                 nes_form_reg_msg(nesvnic, &pm_reg_msg);
2423                 iwpm_err = iwpm_register_pid(&pm_reg_msg, RDMA_NL_NES);
2424                 if (iwpm_err) {
2425                         nes_debug(NES_DBG_NLMSG,
2426                         "Port Mapper reg pid fail (err = %d).\n", iwpm_err);
2427                 }
2428                 if (iwpm_valid_pid() && !iwpm_err) {
2429                         nes_form_pm_msg(cm_info, &pm_msg);
2430                         iwpm_err = iwpm_add_mapping(&pm_msg, RDMA_NL_NES);
2431                         if (iwpm_err)
2432                                 nes_debug(NES_DBG_NLMSG,
2433                                 "Port Mapper query fail (err = %d).\n", iwpm_err);
2434                         else
2435                                 nes_record_pm_msg(cm_info, &pm_msg);
2436                 }
2437
2438                 /* create a CM listen node (1/2 node to compare incoming traffic to) */
2439                 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
2440                 if (!listener) {
2441                         nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n");
2442                         return NULL;
2443                 }
2444
2445                 listener->loc_addr = cm_info->loc_addr;
2446                 listener->loc_port = cm_info->loc_port;
2447                 listener->mapped_loc_addr = cm_info->mapped_loc_addr;
2448                 listener->mapped_loc_port = cm_info->mapped_loc_port;
2449                 listener->reused_node = 0;
2450
2451                 atomic_set(&listener->ref_count, 1);
2452         }
2453         /* pasive case */
2454         /* find already inc'ed the ref count */
2455         else {
2456                 listener->reused_node = 1;
2457         }
2458
2459         listener->cm_id = cm_info->cm_id;
2460         atomic_set(&listener->pend_accepts_cnt, 0);
2461         listener->cm_core = cm_core;
2462         listener->nesvnic = nesvnic;
2463         atomic_inc(&cm_core->node_cnt);
2464
2465         listener->conn_type = cm_info->conn_type;
2466         listener->backlog = cm_info->backlog;
2467         listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;
2468
2469         if (!listener->reused_node) {
2470                 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2471                 list_add(&listener->list, &cm_core->listen_list.list);
2472                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2473                 atomic_inc(&cm_core->listen_node_cnt);
2474         }
2475
2476         nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x,"
2477                   " listener = %p, backlog = %d, cm_id = %p.\n",
2478                   cm_info->loc_addr, cm_info->loc_port,
2479                   listener, listener->backlog, listener->cm_id);
2480
2481         return listener;
2482 }
2483
2484
2485 /**
2486  * mini_cm_connect - make a connection node with params
2487  */
2488 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core,
2489                                            struct nes_vnic *nesvnic, u16 private_data_len,
2490                                            void *private_data, struct nes_cm_info *cm_info)
2491 {
2492         int ret = 0;
2493         struct nes_cm_node *cm_node;
2494         struct nes_cm_listener *loopbackremotelistener;
2495         struct nes_cm_node *loopbackremotenode;
2496         struct nes_cm_info loopback_cm_info;
2497         u8 *start_buff;
2498
2499         /* create a CM connection node */
2500         cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL);
2501         if (!cm_node)
2502                 return NULL;
2503
2504         /* set our node side to client (active) side */
2505         cm_node->tcp_cntxt.client = 1;
2506         cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
2507
2508         if (cm_info->loc_addr == cm_info->rem_addr) {
2509                 loopbackremotelistener = find_listener(cm_core,
2510                         cm_node->mapped_loc_addr, cm_node->mapped_rem_port,
2511                         NES_CM_LISTENER_ACTIVE_STATE, 0);
2512                 if (loopbackremotelistener == NULL) {
2513                         create_event(cm_node, NES_CM_EVENT_ABORTED);
2514                 } else {
2515                         loopback_cm_info = *cm_info;
2516                         loopback_cm_info.loc_port = cm_info->rem_port;
2517                         loopback_cm_info.rem_port = cm_info->loc_port;
2518                         loopback_cm_info.mapped_loc_port =
2519                                 cm_info->mapped_rem_port;
2520                         loopback_cm_info.mapped_rem_port =
2521                                 cm_info->mapped_loc_port;
2522                         loopback_cm_info.cm_id = loopbackremotelistener->cm_id;
2523                         loopbackremotenode = make_cm_node(cm_core, nesvnic,
2524                                                           &loopback_cm_info, loopbackremotelistener);
2525                         if (!loopbackremotenode) {
2526                                 rem_ref_cm_node(cm_node->cm_core, cm_node);
2527                                 return NULL;
2528                         }
2529                         atomic_inc(&cm_loopbacks);
2530                         loopbackremotenode->loopbackpartner = cm_node;
2531                         loopbackremotenode->tcp_cntxt.rcv_wscale =
2532                                 NES_CM_DEFAULT_RCV_WND_SCALE;
2533                         cm_node->loopbackpartner = loopbackremotenode;
2534                         memcpy(loopbackremotenode->mpa_frame_buf, private_data,
2535                                private_data_len);
2536                         loopbackremotenode->mpa_frame_size = private_data_len;
2537
2538                         /* we are done handling this state. */
2539                         /* set node to a TSA state */
2540                         cm_node->state = NES_CM_STATE_TSA;
2541                         cm_node->tcp_cntxt.rcv_nxt =
2542                                 loopbackremotenode->tcp_cntxt.loc_seq_num;
2543                         loopbackremotenode->tcp_cntxt.rcv_nxt =
2544                                 cm_node->tcp_cntxt.loc_seq_num;
2545                         cm_node->tcp_cntxt.max_snd_wnd =
2546                                 loopbackremotenode->tcp_cntxt.rcv_wnd;
2547                         loopbackremotenode->tcp_cntxt.max_snd_wnd =
2548                                 cm_node->tcp_cntxt.rcv_wnd;
2549                         cm_node->tcp_cntxt.snd_wnd =
2550                                 loopbackremotenode->tcp_cntxt.rcv_wnd;
2551                         loopbackremotenode->tcp_cntxt.snd_wnd =
2552                                 cm_node->tcp_cntxt.rcv_wnd;
2553                         cm_node->tcp_cntxt.snd_wscale =
2554                                 loopbackremotenode->tcp_cntxt.rcv_wscale;
2555                         loopbackremotenode->tcp_cntxt.snd_wscale =
2556                                 cm_node->tcp_cntxt.rcv_wscale;
2557                         loopbackremotenode->state = NES_CM_STATE_MPAREQ_RCVD;
2558                         create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ);
2559                 }
2560                 return cm_node;
2561         }
2562
2563         start_buff = &cm_node->mpa_frame_buf[0] + sizeof(struct ietf_mpa_v2);
2564         cm_node->mpa_frame_size = private_data_len;
2565
2566         memcpy(start_buff, private_data, private_data_len);
2567
2568         /* send a syn and goto syn sent state */
2569         cm_node->state = NES_CM_STATE_SYN_SENT;
2570         ret = send_syn(cm_node, 0, NULL);
2571
2572         if (ret) {
2573                 /* error in sending the syn free up the cm_node struct */
2574                 nes_debug(NES_DBG_CM, "Api - connect() FAILED: dest "
2575                           "addr=0x%08X, port=0x%04x, cm_node=%p, cm_id = %p.\n",
2576                           cm_node->rem_addr, cm_node->rem_port, cm_node,
2577                           cm_node->cm_id);
2578                 rem_ref_cm_node(cm_node->cm_core, cm_node);
2579                 cm_node = NULL;
2580         }
2581
2582         if (cm_node) {
2583                 nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X,"
2584                           "port=0x%04x, cm_node=%p, cm_id = %p.\n",
2585                           cm_node->rem_addr, cm_node->rem_port, cm_node,
2586                           cm_node->cm_id);
2587         }
2588
2589         return cm_node;
2590 }
2591
2592
2593 /**
2594  * mini_cm_accept - accept a connection
2595  * This function is never called
2596  */
2597 static int mini_cm_accept(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2598 {
2599         return 0;
2600 }
2601
2602
2603 /**
2604  * mini_cm_reject - reject and teardown a connection
2605  */
2606 static int mini_cm_reject(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2607 {
2608         int ret = 0;
2609         int err = 0;
2610         int passive_state;
2611         struct nes_cm_event event;
2612         struct iw_cm_id *cm_id = cm_node->cm_id;
2613         struct nes_cm_node *loopback = cm_node->loopbackpartner;
2614
2615         nes_debug(NES_DBG_CM, "%s cm_node=%p type=%d state=%d\n",
2616                   __func__, cm_node, cm_node->tcp_cntxt.client, cm_node->state);
2617
2618         if (cm_node->tcp_cntxt.client)
2619                 return ret;
2620         cleanup_retrans_entry(cm_node);
2621
2622         if (!loopback) {
2623                 passive_state = atomic_add_return(1, &cm_node->passive_state);
2624                 if (passive_state == NES_SEND_RESET_EVENT) {
2625                         cm_node->state = NES_CM_STATE_CLOSED;
2626                         rem_ref_cm_node(cm_core, cm_node);
2627                 } else {
2628                         if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2629                                 rem_ref_cm_node(cm_core, cm_node);
2630                         } else {
2631                                 ret = send_mpa_reject(cm_node);
2632                                 if (ret) {
2633                                         cm_node->state = NES_CM_STATE_CLOSED;
2634                                         err = send_reset(cm_node, NULL);
2635                                         if (err)
2636                                                 WARN_ON(1);
2637                                 } else {
2638                                         cm_id->add_ref(cm_id);
2639                                 }
2640                         }
2641                 }
2642         } else {
2643                 cm_node->cm_id = NULL;
2644                 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2645                         rem_ref_cm_node(cm_core, cm_node);
2646                         rem_ref_cm_node(cm_core, loopback);
2647                 } else {
2648                         event.cm_node = loopback;
2649                         event.cm_info.rem_addr = loopback->rem_addr;
2650                         event.cm_info.loc_addr = loopback->loc_addr;
2651                         event.cm_info.rem_port = loopback->rem_port;
2652                         event.cm_info.loc_port = loopback->loc_port;
2653                         event.cm_info.cm_id = loopback->cm_id;
2654                         cm_event_mpa_reject(&event);
2655                         rem_ref_cm_node(cm_core, cm_node);
2656                         loopback->state = NES_CM_STATE_CLOSING;
2657
2658                         cm_id = loopback->cm_id;
2659                         rem_ref_cm_node(cm_core, loopback);
2660                         cm_id->rem_ref(cm_id);
2661                 }
2662         }
2663
2664         return ret;
2665 }
2666
2667
2668 /**
2669  * mini_cm_close
2670  */
2671 static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2672 {
2673         int ret = 0;
2674
2675         if (!cm_core || !cm_node)
2676                 return -EINVAL;
2677
2678         switch (cm_node->state) {
2679         case NES_CM_STATE_SYN_RCVD:
2680         case NES_CM_STATE_SYN_SENT:
2681         case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
2682         case NES_CM_STATE_ESTABLISHED:
2683         case NES_CM_STATE_ACCEPTING:
2684         case NES_CM_STATE_MPAREQ_SENT:
2685         case NES_CM_STATE_MPAREQ_RCVD:
2686                 cleanup_retrans_entry(cm_node);
2687                 send_reset(cm_node, NULL);
2688                 break;
2689         case NES_CM_STATE_CLOSE_WAIT:
2690                 cm_node->state = NES_CM_STATE_LAST_ACK;
2691                 send_fin(cm_node, NULL);
2692                 break;
2693         case NES_CM_STATE_FIN_WAIT1:
2694         case NES_CM_STATE_FIN_WAIT2:
2695         case NES_CM_STATE_LAST_ACK:
2696         case NES_CM_STATE_TIME_WAIT:
2697         case NES_CM_STATE_CLOSING:
2698                 ret = -1;
2699                 break;
2700         case NES_CM_STATE_LISTENING:
2701                 cleanup_retrans_entry(cm_node);
2702                 send_reset(cm_node, NULL);
2703                 break;
2704         case NES_CM_STATE_MPAREJ_RCVD:
2705         case NES_CM_STATE_UNKNOWN:
2706         case NES_CM_STATE_INITED:
2707         case NES_CM_STATE_CLOSED:
2708         case NES_CM_STATE_LISTENER_DESTROYED:
2709                 ret = rem_ref_cm_node(cm_core, cm_node);
2710                 break;
2711         case NES_CM_STATE_TSA:
2712                 if (cm_node->send_entry)
2713                         printk(KERN_ERR "ERROR Close got called from STATE_TSA "
2714                                "send_entry=%p\n", cm_node->send_entry);
2715                 ret = rem_ref_cm_node(cm_core, cm_node);
2716                 break;
2717         }
2718         return ret;
2719 }
2720
2721
2722 /**
2723  * recv_pkt - recv an ETHERNET packet, and process it through CM
2724  * node state machine
2725  */
2726 static int mini_cm_recv_pkt(struct nes_cm_core *cm_core,
2727                             struct nes_vnic *nesvnic, struct sk_buff *skb)
2728 {
2729         struct nes_cm_node *cm_node = NULL;
2730         struct nes_cm_listener *listener = NULL;
2731         struct iphdr *iph;
2732         struct tcphdr *tcph;
2733         struct nes_cm_info nfo;
2734         int skb_handled = 1;
2735         __be32 tmp_daddr, tmp_saddr;
2736
2737         if (!skb)
2738                 return 0;
2739         if (skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr))
2740                 return 0;
2741
2742         iph = (struct iphdr *)skb->data;
2743         tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));
2744
2745         nfo.loc_addr = ntohl(iph->daddr);
2746         nfo.loc_port = ntohs(tcph->dest);
2747         nfo.rem_addr = ntohl(iph->saddr);
2748         nfo.rem_port = ntohs(tcph->source);
2749
2750         /* If port mapper is available these should be mapped address info */
2751         nfo.mapped_loc_addr = ntohl(iph->daddr);
2752         nfo.mapped_loc_port = ntohs(tcph->dest);
2753         nfo.mapped_rem_addr = ntohl(iph->saddr);
2754         nfo.mapped_rem_port = ntohs(tcph->source);
2755
2756         tmp_daddr = cpu_to_be32(iph->daddr);
2757         tmp_saddr = cpu_to_be32(iph->saddr);
2758
2759         nes_debug(NES_DBG_CM, "Received packet: dest=%pI4:0x%04X src=%pI4:0x%04X\n",
2760                   &tmp_daddr, tcph->dest, &tmp_saddr, tcph->source);
2761
2762         do {
2763                 cm_node = find_node(cm_core,
2764                                     nfo.mapped_rem_port, nfo.mapped_rem_addr,
2765                                     nfo.mapped_loc_port, nfo.mapped_loc_addr);
2766
2767                 if (!cm_node) {
2768                         /* Only type of packet accepted are for */
2769                         /* the PASSIVE open (syn only) */
2770                         if ((!tcph->syn) || (tcph->ack)) {
2771                                 skb_handled = 0;
2772                                 break;
2773                         }
2774                         listener = find_listener(cm_core, nfo.mapped_loc_addr,
2775                                         nfo.mapped_loc_port,
2776                                         NES_CM_LISTENER_ACTIVE_STATE, 0);
2777                         if (!listener) {
2778                                 nfo.cm_id = NULL;
2779                                 nfo.conn_type = 0;
2780                                 nes_debug(NES_DBG_CM, "Unable to find listener for the pkt\n");
2781                                 skb_handled = 0;
2782                                 break;
2783                         }
2784                         nfo.cm_id = listener->cm_id;
2785                         nfo.conn_type = listener->conn_type;
2786                         cm_node = make_cm_node(cm_core, nesvnic, &nfo,
2787                                                listener);
2788                         if (!cm_node) {
2789                                 nes_debug(NES_DBG_CM, "Unable to allocate "
2790                                           "node\n");
2791                                 cm_packets_dropped++;
2792                                 atomic_dec(&listener->ref_count);
2793                                 dev_kfree_skb_any(skb);
2794                                 break;
2795                         }
2796                         if (!tcph->rst && !tcph->fin) {
2797                                 cm_node->state = NES_CM_STATE_LISTENING;
2798                         } else {
2799                                 cm_packets_dropped++;
2800                                 rem_ref_cm_node(cm_core, cm_node);
2801                                 dev_kfree_skb_any(skb);
2802                                 break;
2803                         }
2804                         add_ref_cm_node(cm_node);
2805                 } else if (cm_node->state == NES_CM_STATE_TSA) {
2806                         if (cm_node->nesqp->pau_mode)
2807                                 nes_queue_mgt_skbs(skb, nesvnic, cm_node->nesqp);
2808                         else {
2809                                 rem_ref_cm_node(cm_core, cm_node);
2810                                 atomic_inc(&cm_accel_dropped_pkts);
2811                                 dev_kfree_skb_any(skb);
2812                         }
2813                         break;
2814                 }
2815                 skb_reset_network_header(skb);
2816                 skb_set_transport_header(skb, sizeof(*tcph));
2817                 skb->len = ntohs(iph->tot_len);
2818                 process_packet(cm_node, skb, cm_core);
2819                 rem_ref_cm_node(cm_core, cm_node);
2820         } while (0);
2821         return skb_handled;
2822 }
2823
2824
2825 /**
2826  * nes_cm_alloc_core - allocate a top level instance of a cm core
2827  */
2828 static struct nes_cm_core *nes_cm_alloc_core(void)
2829 {
2830         struct nes_cm_core *cm_core;
2831
2832         /* setup the CM core */
2833         /* alloc top level core control structure */
2834         cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
2835         if (!cm_core)
2836                 return NULL;
2837
2838         INIT_LIST_HEAD(&cm_core->connected_nodes);
2839         init_timer(&cm_core->tcp_timer);
2840         cm_core->tcp_timer.function = nes_cm_timer_tick;
2841
2842         cm_core->mtu = NES_CM_DEFAULT_MTU;
2843         cm_core->state = NES_CM_STATE_INITED;
2844         cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS;
2845
2846         atomic_set(&cm_core->events_posted, 0);
2847
2848         cm_core->api = &nes_cm_api;
2849
2850         spin_lock_init(&cm_core->ht_lock);
2851         spin_lock_init(&cm_core->listen_list_lock);
2852
2853         INIT_LIST_HEAD(&cm_core->listen_list.list);
2854
2855         nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core);
2856
2857         nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
2858         cm_core->event_wq = create_singlethread_workqueue("nesewq");
2859         cm_core->post_event = nes_cm_post_event;
2860         nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
2861         cm_core->disconn_wq = create_singlethread_workqueue("nesdwq");
2862
2863         print_core(cm_core);
2864         return cm_core;
2865 }
2866
2867
2868 /**
2869  * mini_cm_dealloc_core - deallocate a top level instance of a cm core
2870  */
2871 static int mini_cm_dealloc_core(struct nes_cm_core *cm_core)
2872 {
2873         nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core);
2874
2875         if (!cm_core)
2876                 return -EINVAL;
2877
2878         barrier();
2879
2880         if (timer_pending(&cm_core->tcp_timer))
2881                 del_timer(&cm_core->tcp_timer);
2882
2883         destroy_workqueue(cm_core->event_wq);
2884         destroy_workqueue(cm_core->disconn_wq);
2885         nes_debug(NES_DBG_CM, "\n");
2886         kfree(cm_core);
2887
2888         return 0;
2889 }
2890
2891
2892 /**
2893  * mini_cm_get
2894  */
2895 static int mini_cm_get(struct nes_cm_core *cm_core)
2896 {
2897         return cm_core->state;
2898 }
2899
2900
2901 /**
2902  * mini_cm_set
2903  */
2904 static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value)
2905 {
2906         int ret = 0;
2907
2908         switch (type) {
2909         case NES_CM_SET_PKT_SIZE:
2910                 cm_core->mtu = value;
2911                 break;
2912         case NES_CM_SET_FREE_PKT_Q_SIZE:
2913                 cm_core->free_tx_pkt_max = value;
2914                 break;
2915         default:
2916                 /* unknown set option */
2917                 ret = -EINVAL;
2918         }
2919
2920         return ret;
2921 }
2922
2923
2924 /**
2925  * nes_cm_init_tsa_conn setup HW; MPA frames must be
2926  * successfully exchanged when this is called
2927  */
2928 static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node)
2929 {
2930         int ret = 0;
2931
2932         if (!nesqp)
2933                 return -EINVAL;
2934
2935         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 |
2936                                                   NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG |
2937                                                   NES_QPCONTEXT_MISC_DROS);
2938
2939         if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale)
2940                 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE);
2941
2942         nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT);
2943
2944         nesqp->nesqp_context->misc2 |= cpu_to_le32(
2945                 cm_node->tos << NES_QPCONTEXT_MISC2_TOS_SHIFT);
2946
2947         nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16);
2948
2949         nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32(
2950                 (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT);
2951
2952         nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2953                 (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) &
2954                 NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK);
2955
2956         nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2957                 (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) &
2958                 NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK);
2959
2960         nesqp->nesqp_context->keepalive = cpu_to_le32(0x80);
2961         nesqp->nesqp_context->ts_recent = 0;
2962         nesqp->nesqp_context->ts_age = 0;
2963         nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2964         nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
2965         nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2966         nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
2967                                                     cm_node->tcp_cntxt.rcv_wscale);
2968         nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2969         nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2970         nesqp->nesqp_context->srtt = 0;
2971         nesqp->nesqp_context->rttvar = cpu_to_le32(0x6);
2972         nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000);
2973         nesqp->nesqp_context->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss);
2974         nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2975         nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2976         nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
2977
2978         nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X,"
2979                   " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n",
2980                   nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2981                   le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2982                   cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale),
2983                   le32_to_cpu(nesqp->nesqp_context->rcv_wnd),
2984                   le32_to_cpu(nesqp->nesqp_context->misc));
2985         nes_debug(NES_DBG_CM, "  snd_wnd  = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd));
2986         nes_debug(NES_DBG_CM, "  snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd));
2987         nes_debug(NES_DBG_CM, "  max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd));
2988
2989         nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n");
2990         cm_node->state = NES_CM_STATE_TSA;
2991
2992         return ret;
2993 }
2994
2995
2996 /**
2997  * nes_cm_disconn
2998  */
2999 int nes_cm_disconn(struct nes_qp *nesqp)
3000 {
3001         struct disconn_work *work;
3002
3003         work = kzalloc(sizeof *work, GFP_ATOMIC);
3004         if (!work)
3005                 return -ENOMEM;  /* Timer will clean up */
3006
3007         nes_add_ref(&nesqp->ibqp);
3008         work->nesqp = nesqp;
3009         INIT_WORK(&work->work, nes_disconnect_worker);
3010         queue_work(g_cm_core->disconn_wq, &work->work);
3011         return 0;
3012 }
3013
3014
3015 /**
3016  * nes_disconnect_worker
3017  */
3018 static void nes_disconnect_worker(struct work_struct *work)
3019 {
3020         struct disconn_work *dwork = container_of(work, struct disconn_work, work);
3021         struct nes_qp *nesqp = dwork->nesqp;
3022
3023         kfree(dwork);
3024         nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n",
3025                   nesqp->last_aeq, nesqp->hwqp.qp_id);
3026         nes_cm_disconn_true(nesqp);
3027         nes_rem_ref(&nesqp->ibqp);
3028 }
3029
3030
3031 /**
3032  * nes_cm_disconn_true
3033  */
3034 static int nes_cm_disconn_true(struct nes_qp *nesqp)
3035 {
3036         unsigned long flags;
3037         int ret = 0;
3038         struct iw_cm_id *cm_id;
3039         struct iw_cm_event cm_event;
3040         struct nes_vnic *nesvnic;
3041         u16 last_ae;
3042         u8 original_hw_tcp_state;
3043         u8 original_ibqp_state;
3044         int disconn_status = 0;
3045         int issue_disconn = 0;
3046         int issue_close = 0;
3047         int issue_flush = 0;
3048         u32 flush_q = NES_CQP_FLUSH_RQ;
3049         struct ib_event ibevent;
3050
3051         if (!nesqp) {
3052                 nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n");
3053                 return -1;
3054         }
3055
3056         spin_lock_irqsave(&nesqp->lock, flags);
3057         cm_id = nesqp->cm_id;
3058         /* make sure we havent already closed this connection */
3059         if (!cm_id) {
3060                 nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n",
3061                           nesqp->hwqp.qp_id);
3062                 spin_unlock_irqrestore(&nesqp->lock, flags);
3063                 return -1;
3064         }
3065
3066         nesvnic = to_nesvnic(nesqp->ibqp.device);
3067         nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id);
3068
3069         original_hw_tcp_state = nesqp->hw_tcp_state;
3070         original_ibqp_state = nesqp->ibqp_state;
3071         last_ae = nesqp->last_aeq;
3072
3073         if (nesqp->term_flags) {
3074                 issue_disconn = 1;
3075                 issue_close = 1;
3076                 nesqp->cm_id = NULL;
3077                 del_timer(&nesqp->terminate_timer);
3078                 if (nesqp->flush_issued == 0) {
3079                         nesqp->flush_issued = 1;
3080                         issue_flush = 1;
3081                 }
3082         } else if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) ||
3083                         ((original_ibqp_state == IB_QPS_RTS) &&
3084                         (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
3085                 issue_disconn = 1;
3086                 if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET)
3087                         disconn_status = -ECONNRESET;
3088         }
3089
3090         if (((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) ||
3091                  (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) ||
3092                  (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) ||
3093                  (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
3094                 issue_close = 1;
3095                 nesqp->cm_id = NULL;
3096                 if (nesqp->flush_issued == 0) {
3097                         nesqp->flush_issued = 1;
3098                         issue_flush = 1;
3099                 }
3100         }
3101
3102         spin_unlock_irqrestore(&nesqp->lock, flags);
3103
3104         if ((issue_flush) && (nesqp->destroyed == 0)) {
3105                 /* Flush the queue(s) */
3106                 if (nesqp->hw_iwarp_state >= NES_AEQE_IWARP_STATE_TERMINATE)
3107                         flush_q |= NES_CQP_FLUSH_SQ;
3108                 flush_wqes(nesvnic->nesdev, nesqp, flush_q, 1);
3109
3110                 if (nesqp->term_flags) {
3111                         ibevent.device = nesqp->ibqp.device;
3112                         ibevent.event = nesqp->terminate_eventtype;
3113                         ibevent.element.qp = &nesqp->ibqp;
3114                         if (nesqp->ibqp.event_handler)
3115                                 nesqp->ibqp.event_handler(&ibevent, nesqp->ibqp.qp_context);
3116                 }
3117         }
3118
3119         if ((cm_id) && (cm_id->event_handler)) {
3120                 if (issue_disconn) {
3121                         atomic_inc(&cm_disconnects);
3122                         cm_event.event = IW_CM_EVENT_DISCONNECT;
3123                         cm_event.status = disconn_status;
3124                         cm_event.local_addr = cm_id->local_addr;
3125                         cm_event.remote_addr = cm_id->remote_addr;
3126                         cm_event.private_data = NULL;
3127                         cm_event.private_data_len = 0;
3128
3129                         nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event"
3130                                   " for  QP%u, SQ Head = %u, SQ Tail = %u. "
3131                                   "cm_id = %p, refcount = %u.\n",
3132                                   nesqp->hwqp.qp_id, nesqp->hwqp.sq_head,
3133                                   nesqp->hwqp.sq_tail, cm_id,
3134                                   atomic_read(&nesqp->refcount));
3135
3136                         ret = cm_id->event_handler(cm_id, &cm_event);
3137                         if (ret)
3138                                 nes_debug(NES_DBG_CM, "OFA CM event_handler "
3139                                           "returned, ret=%d\n", ret);
3140                 }
3141
3142                 if (issue_close) {
3143                         atomic_inc(&cm_closes);
3144                         nes_disconnect(nesqp, 1);
3145
3146                         cm_id->provider_data = nesqp;
3147                         /* Send up the close complete event */
3148                         cm_event.event = IW_CM_EVENT_CLOSE;
3149                         cm_event.status = 0;
3150                         cm_event.provider_data = cm_id->provider_data;
3151                         cm_event.local_addr = cm_id->local_addr;
3152                         cm_event.remote_addr = cm_id->remote_addr;
3153                         cm_event.private_data = NULL;
3154                         cm_event.private_data_len = 0;
3155
3156                         ret = cm_id->event_handler(cm_id, &cm_event);
3157                         if (ret)
3158                                 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3159
3160                         cm_id->rem_ref(cm_id);
3161                 }
3162         }
3163
3164         return 0;
3165 }
3166
3167
3168 /**
3169  * nes_disconnect
3170  */
3171 static int nes_disconnect(struct nes_qp *nesqp, int abrupt)
3172 {
3173         int ret = 0;
3174         struct nes_vnic *nesvnic;
3175         struct nes_device *nesdev;
3176         struct nes_ib_device *nesibdev;
3177
3178         nesvnic = to_nesvnic(nesqp->ibqp.device);
3179         if (!nesvnic)
3180                 return -EINVAL;
3181
3182         nesdev = nesvnic->nesdev;
3183         nesibdev = nesvnic->nesibdev;
3184
3185         nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
3186                         netdev_refcnt_read(nesvnic->netdev));
3187
3188         if (nesqp->active_conn) {
3189
3190                 /* indicate this connection is NOT active */
3191                 nesqp->active_conn = 0;
3192         } else {
3193                 /* Need to free the Last Streaming Mode Message */
3194                 if (nesqp->ietf_frame) {
3195                         if (nesqp->lsmm_mr)
3196                                 nesibdev->ibdev.dereg_mr(nesqp->lsmm_mr);
3197                         pci_free_consistent(nesdev->pcidev,
3198                                             nesqp->private_data_len + nesqp->ietf_frame_size,
3199                                             nesqp->ietf_frame, nesqp->ietf_frame_pbase);
3200                 }
3201         }
3202
3203         /* close the CM node down if it is still active */
3204         if (nesqp->cm_node) {
3205                 nes_debug(NES_DBG_CM, "Call close API\n");
3206
3207                 g_cm_core->api->close(g_cm_core, nesqp->cm_node);
3208         }
3209
3210         return ret;
3211 }
3212
3213
3214 /**
3215  * nes_accept
3216  */
3217 int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3218 {
3219         u64 u64temp;
3220         struct ib_qp *ibqp;
3221         struct nes_qp *nesqp;
3222         struct nes_vnic *nesvnic;
3223         struct nes_device *nesdev;
3224         struct nes_cm_node *cm_node;
3225         struct nes_adapter *adapter;
3226         struct ib_qp_attr attr;
3227         struct iw_cm_event cm_event;
3228         struct nes_hw_qp_wqe *wqe;
3229         struct nes_v4_quad nes_quad;
3230         u32 crc_value;
3231         int ret;
3232         int passive_state;
3233         struct nes_ib_device *nesibdev;
3234         struct ib_mr *ibmr = NULL;
3235         struct ib_phys_buf ibphysbuf;
3236         struct nes_pd *nespd;
3237         u64 tagged_offset;
3238         u8 mpa_frame_offset = 0;
3239         struct ietf_mpa_v2 *mpa_v2_frame;
3240         u8 start_addr = 0;
3241         u8 *start_ptr = &start_addr;
3242         u8 **start_buff = &start_ptr;
3243         u16 buff_len = 0;
3244         struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
3245         struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr;
3246
3247         ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3248         if (!ibqp)
3249                 return -EINVAL;
3250
3251         /* get all our handles */
3252         nesqp = to_nesqp(ibqp);
3253         nesvnic = to_nesvnic(nesqp->ibqp.device);
3254         nesdev = nesvnic->nesdev;
3255         adapter = nesdev->nesadapter;
3256
3257         cm_node = (struct nes_cm_node *)cm_id->provider_data;
3258         nes_debug(NES_DBG_CM, "nes_accept: cm_node= %p nesvnic=%p, netdev=%p,"
3259                 "%s\n", cm_node, nesvnic, nesvnic->netdev,
3260                 nesvnic->netdev->name);
3261
3262         if (NES_CM_STATE_LISTENER_DESTROYED == cm_node->state) {
3263                 if (cm_node->loopbackpartner)
3264                         rem_ref_cm_node(cm_node->cm_core, cm_node->loopbackpartner);
3265                 rem_ref_cm_node(cm_node->cm_core, cm_node);
3266                 return -EINVAL;
3267         }
3268
3269         passive_state = atomic_add_return(1, &cm_node->passive_state);
3270         if (passive_state == NES_SEND_RESET_EVENT) {
3271                 rem_ref_cm_node(cm_node->cm_core, cm_node);
3272                 return -ECONNRESET;
3273         }
3274         /* associate the node with the QP */
3275         nesqp->cm_node = (void *)cm_node;
3276         cm_node->nesqp = nesqp;
3277
3278
3279         nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu listener = %p\n",
3280                 nesqp->hwqp.qp_id, cm_node, jiffies, cm_node->listener);
3281         atomic_inc(&cm_accepts);
3282
3283         nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
3284                         netdev_refcnt_read(nesvnic->netdev));
3285
3286         nesqp->ietf_frame_size = sizeof(struct ietf_mpa_v2);
3287         /* allocate the ietf frame and space for private data */
3288         nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev,
3289                                                  nesqp->ietf_frame_size + conn_param->private_data_len,
3290                                                  &nesqp->ietf_frame_pbase);
3291
3292         if (!nesqp->ietf_frame) {
3293                 nes_debug(NES_DBG_CM, "Unable to allocate memory for private data\n");
3294                 return -ENOMEM;
3295         }
3296         mpa_v2_frame = (struct ietf_mpa_v2 *)nesqp->ietf_frame;
3297
3298         if (cm_node->mpa_frame_rev == IETF_MPA_V1)
3299                 mpa_frame_offset = 4;
3300
3301         if (cm_node->mpa_frame_rev == IETF_MPA_V1 ||
3302                         cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) {
3303                 record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord);
3304         }
3305
3306         memcpy(mpa_v2_frame->priv_data, conn_param->private_data,
3307                conn_param->private_data_len);
3308
3309         cm_build_mpa_frame(cm_node, start_buff, &buff_len, nesqp->ietf_frame, MPA_KEY_REPLY);
3310         nesqp->private_data_len = conn_param->private_data_len;
3311
3312         /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3313         wqe = &nesqp->hwqp.sq_vbase[0];
3314
3315         if (raddr->sin_addr.s_addr != laddr->sin_addr.s_addr) {
3316                 u64temp = (unsigned long)nesqp;
3317                 nesibdev = nesvnic->nesibdev;
3318                 nespd = nesqp->nespd;
3319                 ibphysbuf.addr = nesqp->ietf_frame_pbase + mpa_frame_offset;
3320                 ibphysbuf.size = buff_len;
3321                 tagged_offset = (u64)(unsigned long)*start_buff;
3322                 ibmr = nesibdev->ibdev.reg_phys_mr((struct ib_pd *)nespd,
3323                                                    &ibphysbuf, 1,
3324                                                    IB_ACCESS_LOCAL_WRITE,
3325                                                    &tagged_offset);
3326                 if (!ibmr) {
3327                         nes_debug(NES_DBG_CM, "Unable to register memory region"
3328                                   "for lSMM for cm_node = %p \n",
3329                                   cm_node);
3330                         pci_free_consistent(nesdev->pcidev,
3331                                             nesqp->private_data_len + nesqp->ietf_frame_size,
3332                                             nesqp->ietf_frame, nesqp->ietf_frame_pbase);
3333                         return -ENOMEM;
3334                 }
3335
3336                 ibmr->pd = &nespd->ibpd;
3337                 ibmr->device = nespd->ibpd.device;
3338                 nesqp->lsmm_mr = ibmr;
3339
3340                 u64temp |= NES_SW_CONTEXT_ALIGN >> 1;
3341                 set_wqe_64bit_value(wqe->wqe_words,
3342                                     NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
3343                                     u64temp);
3344                 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
3345                         cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING |
3346                                     NES_IWARP_SQ_WQE_WRPDU);
3347                 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] =
3348                         cpu_to_le32(buff_len);
3349                 set_wqe_64bit_value(wqe->wqe_words,
3350                                     NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
3351                                     (u64)(unsigned long)(*start_buff));
3352                 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] =
3353                         cpu_to_le32(buff_len);
3354                 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = ibmr->lkey;
3355                 if (nesqp->sq_kmapped) {
3356                         nesqp->sq_kmapped = 0;
3357                         kunmap(nesqp->page);
3358                 }
3359
3360                 nesqp->nesqp_context->ird_ord_sizes |=
3361                         cpu_to_le32(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
3362                                     NES_QPCONTEXT_ORDIRD_WRPDU);
3363         } else {
3364                 nesqp->nesqp_context->ird_ord_sizes |=
3365                         cpu_to_le32(NES_QPCONTEXT_ORDIRD_WRPDU);
3366         }
3367         nesqp->skip_lsmm = 1;
3368
3369         /* Cache the cm_id in the qp */
3370         nesqp->cm_id = cm_id;
3371         cm_node->cm_id = cm_id;
3372
3373         /*  nesqp->cm_node = (void *)cm_id->provider_data; */
3374         cm_id->provider_data = nesqp;
3375         nesqp->active_conn = 0;
3376
3377         if (cm_node->state == NES_CM_STATE_TSA)
3378                 nes_debug(NES_DBG_CM, "Already state = TSA for cm_node=%p\n",
3379                           cm_node);
3380
3381         nes_cm_init_tsa_conn(nesqp, cm_node);
3382
3383         nesqp->nesqp_context->tcpPorts[0] =
3384                                 cpu_to_le16(cm_node->mapped_loc_port);
3385         nesqp->nesqp_context->tcpPorts[1] =
3386                                 cpu_to_le16(cm_node->mapped_rem_port);
3387
3388         nesqp->nesqp_context->ip0 = cpu_to_le32(cm_node->mapped_rem_addr);
3389
3390         nesqp->nesqp_context->misc2 |= cpu_to_le32(
3391                 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3392                 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3393
3394         nesqp->nesqp_context->arp_index_vlan |=
3395                 cpu_to_le32(nes_arp_table(nesdev,
3396                                           le32_to_cpu(nesqp->nesqp_context->ip0), NULL,
3397                                           NES_ARP_RESOLVE) << 16);
3398
3399         nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3400                 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3401
3402         nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3403
3404         nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
3405                 ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT));
3406         nesqp->nesqp_context->ird_ord_sizes |=
3407                 cpu_to_le32((u32)cm_node->ord_size);
3408
3409         memset(&nes_quad, 0, sizeof(nes_quad));
3410         nes_quad.DstIpAdrIndex =
3411                 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3412         nes_quad.SrcIpadr = htonl(cm_node->mapped_rem_addr);
3413         nes_quad.TcpPorts[0] = htons(cm_node->mapped_rem_port);
3414         nes_quad.TcpPorts[1] = htons(cm_node->mapped_loc_port);
3415
3416         /* Produce hash key */
3417         crc_value = get_crc_value(&nes_quad);
3418         nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3419         nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n",
3420                   nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask);
3421
3422         nesqp->hte_index &= adapter->hte_index_mask;
3423         nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3424
3425         cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3426
3427         nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = "
3428                   "0x%08X:0x%04X, rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + "
3429                   "private data length=%u.\n", nesqp->hwqp.qp_id,
3430                   ntohl(raddr->sin_addr.s_addr), ntohs(raddr->sin_port),
3431                   ntohl(laddr->sin_addr.s_addr), ntohs(laddr->sin_port),
3432                   le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
3433                   le32_to_cpu(nesqp->nesqp_context->snd_nxt),
3434                   buff_len);
3435
3436         /* notify OF layer that accept event was successful */
3437         cm_id->add_ref(cm_id);
3438         nes_add_ref(&nesqp->ibqp);
3439
3440         cm_event.event = IW_CM_EVENT_ESTABLISHED;
3441         cm_event.status = 0;
3442         cm_event.provider_data = (void *)nesqp;
3443         cm_event.local_addr = cm_id->local_addr;
3444         cm_event.remote_addr = cm_id->remote_addr;
3445         cm_event.private_data = NULL;
3446         cm_event.private_data_len = 0;
3447         cm_event.ird = cm_node->ird_size;
3448         cm_event.ord = cm_node->ord_size;
3449
3450         ret = cm_id->event_handler(cm_id, &cm_event);
3451         attr.qp_state = IB_QPS_RTS;
3452         nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3453         if (cm_node->loopbackpartner) {
3454                 cm_node->loopbackpartner->mpa_frame_size =
3455                         nesqp->private_data_len;
3456                 /* copy entire MPA frame to our cm_node's frame */
3457                 memcpy(cm_node->loopbackpartner->mpa_frame_buf,
3458                        conn_param->private_data, conn_param->private_data_len);
3459                 create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED);
3460         }
3461         if (ret)
3462                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3463                        "ret=%d\n", __func__, __LINE__, ret);
3464
3465         return 0;
3466 }
3467
3468
3469 /**
3470  * nes_reject
3471  */
3472 int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3473 {
3474         struct nes_cm_node *cm_node;
3475         struct nes_cm_node *loopback;
3476         struct nes_cm_core *cm_core;
3477         u8 *start_buff;
3478
3479         atomic_inc(&cm_rejects);
3480         cm_node = (struct nes_cm_node *)cm_id->provider_data;
3481         loopback = cm_node->loopbackpartner;
3482         cm_core = cm_node->cm_core;
3483         cm_node->cm_id = cm_id;
3484
3485         if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER)
3486                 return -EINVAL;
3487
3488         if (loopback) {
3489                 memcpy(&loopback->mpa_frame.priv_data, pdata, pdata_len);
3490                 loopback->mpa_frame.priv_data_len = pdata_len;
3491                 loopback->mpa_frame_size = pdata_len;
3492         } else {
3493                 start_buff = &cm_node->mpa_frame_buf[0] + sizeof(struct ietf_mpa_v2);
3494                 cm_node->mpa_frame_size = pdata_len;
3495                 memcpy(start_buff, pdata, pdata_len);
3496         }
3497         return cm_core->api->reject(cm_core, cm_node);
3498 }
3499
3500
3501 /**
3502  * nes_connect
3503  * setup and launch cm connect node
3504  */
3505 int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3506 {
3507         struct ib_qp *ibqp;
3508         struct nes_qp *nesqp;
3509         struct nes_vnic *nesvnic;
3510         struct nes_device *nesdev;
3511         struct nes_cm_node *cm_node;
3512         struct nes_cm_info cm_info;
3513         int apbvt_set = 0;
3514         struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
3515         struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr;
3516         struct iwpm_dev_data pm_reg_msg;
3517         struct iwpm_sa_data pm_msg;
3518         int iwpm_err = 0;
3519
3520         if (cm_id->remote_addr.ss_family != AF_INET)
3521                 return -ENOSYS;
3522         ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3523         if (!ibqp)
3524                 return -EINVAL;
3525         nesqp = to_nesqp(ibqp);
3526         if (!nesqp)
3527                 return -EINVAL;
3528         nesvnic = to_nesvnic(nesqp->ibqp.device);
3529         if (!nesvnic)
3530                 return -EINVAL;
3531         nesdev = nesvnic->nesdev;
3532         if (!nesdev)
3533                 return -EINVAL;
3534
3535         if (!laddr->sin_port || !raddr->sin_port)
3536                 return -EINVAL;
3537
3538         nes_debug(NES_DBG_CM, "QP%u, current IP = 0x%08X, Destination IP = "
3539                   "0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", nesqp->hwqp.qp_id,
3540                   ntohl(nesvnic->local_ipaddr), ntohl(raddr->sin_addr.s_addr),
3541                   ntohs(raddr->sin_port), ntohl(laddr->sin_addr.s_addr),
3542                   ntohs(laddr->sin_port));
3543
3544         atomic_inc(&cm_connects);
3545         nesqp->active_conn = 1;
3546
3547         /* cache the cm_id in the qp */
3548         nesqp->cm_id = cm_id;
3549         cm_id->provider_data = nesqp;
3550         nesqp->private_data_len = conn_param->private_data_len;
3551
3552         nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord);
3553         nes_debug(NES_DBG_CM, "mpa private data len =%u\n",
3554                   conn_param->private_data_len);
3555
3556         /* set up the connection params for the node */
3557         cm_info.loc_addr = ntohl(laddr->sin_addr.s_addr);
3558         cm_info.loc_port = ntohs(laddr->sin_port);
3559         cm_info.rem_addr = ntohl(raddr->sin_addr.s_addr);
3560         cm_info.rem_port = ntohs(raddr->sin_port);
3561         cm_info.cm_id = cm_id;
3562         cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3563
3564         /* No port mapper available, go with the specified peer information */
3565         cm_info.mapped_loc_addr = cm_info.loc_addr;
3566         cm_info.mapped_loc_port = cm_info.loc_port;
3567         cm_info.mapped_rem_addr = cm_info.rem_addr;
3568         cm_info.mapped_rem_port = cm_info.rem_port;
3569
3570         nes_form_reg_msg(nesvnic, &pm_reg_msg);
3571         iwpm_err = iwpm_register_pid(&pm_reg_msg, RDMA_NL_NES);
3572         if (iwpm_err) {
3573                 nes_debug(NES_DBG_NLMSG,
3574                         "Port Mapper reg pid fail (err = %d).\n", iwpm_err);
3575         }
3576         if (iwpm_valid_pid() && !iwpm_err) {
3577                 nes_form_pm_msg(&cm_info, &pm_msg);
3578                 iwpm_err = iwpm_add_and_query_mapping(&pm_msg, RDMA_NL_NES);
3579                 if (iwpm_err)
3580                         nes_debug(NES_DBG_NLMSG,
3581                         "Port Mapper query fail (err = %d).\n", iwpm_err);
3582                 else
3583                         nes_record_pm_msg(&cm_info, &pm_msg);
3584         }
3585
3586         if (laddr->sin_addr.s_addr != raddr->sin_addr.s_addr) {
3587                 nes_manage_apbvt(nesvnic, cm_info.mapped_loc_port,
3588                         PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD);
3589                 apbvt_set = 1;
3590         }
3591
3592         if (nes_create_mapinfo(&cm_info))
3593                 return -ENOMEM;
3594
3595         cm_id->add_ref(cm_id);
3596
3597         /* create a connect CM node connection */
3598         cm_node = g_cm_core->api->connect(g_cm_core, nesvnic,
3599                                           conn_param->private_data_len, (void *)conn_param->private_data,
3600                                           &cm_info);
3601         if (!cm_node) {
3602                 if (apbvt_set)
3603                         nes_manage_apbvt(nesvnic, cm_info.mapped_loc_port,
3604                                          PCI_FUNC(nesdev->pcidev->devfn),
3605                                          NES_MANAGE_APBVT_DEL);
3606
3607                 nes_debug(NES_DBG_NLMSG, "Delete mapped_loc_port = %04X\n",
3608                                 cm_info.mapped_loc_port);
3609                 nes_remove_mapinfo(cm_info.loc_addr, cm_info.loc_port,
3610                         cm_info.mapped_loc_addr, cm_info.mapped_loc_port);
3611                 cm_id->rem_ref(cm_id);
3612                 return -ENOMEM;
3613         }
3614
3615         record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord);
3616         if (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO &&
3617                                 cm_node->ord_size == 0)
3618                 cm_node->ord_size = 1;
3619
3620         cm_node->apbvt_set = apbvt_set;
3621         cm_node->tos = cm_id->tos;
3622         nesqp->cm_node = cm_node;
3623         cm_node->nesqp = nesqp;
3624         nes_add_ref(&nesqp->ibqp);
3625
3626         return 0;
3627 }
3628
3629
3630 /**
3631  * nes_create_listen
3632  */
3633 int nes_create_listen(struct iw_cm_id *cm_id, int backlog)
3634 {
3635         struct nes_vnic *nesvnic;
3636         struct nes_cm_listener *cm_node;
3637         struct nes_cm_info cm_info;
3638         int err;
3639         struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
3640
3641         nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n",
3642                   cm_id, ntohs(laddr->sin_port));
3643
3644         if (cm_id->local_addr.ss_family != AF_INET)
3645                 return -ENOSYS;
3646         nesvnic = to_nesvnic(cm_id->device);
3647         if (!nesvnic)
3648                 return -EINVAL;
3649
3650         nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
3651                         nesvnic, nesvnic->netdev, nesvnic->netdev->name);
3652
3653         nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n",
3654                         nesvnic->local_ipaddr, laddr->sin_addr.s_addr);
3655
3656         /* setup listen params in our api call struct */
3657         cm_info.loc_addr = ntohl(nesvnic->local_ipaddr);
3658         cm_info.loc_port = ntohs(laddr->sin_port);
3659         cm_info.backlog = backlog;
3660         cm_info.cm_id = cm_id;
3661
3662         cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3663
3664         /* No port mapper available, go with the specified info */
3665         cm_info.mapped_loc_addr = cm_info.loc_addr;
3666         cm_info.mapped_loc_port = cm_info.loc_port;
3667
3668         cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info);
3669         if (!cm_node) {
3670                 printk(KERN_ERR "%s[%u] Error returned from listen API call\n",
3671                        __func__, __LINE__);
3672                 return -ENOMEM;
3673         }
3674
3675         cm_id->provider_data = cm_node;
3676         cm_node->tos = cm_id->tos;
3677
3678         if (!cm_node->reused_node) {
3679                 if (nes_create_mapinfo(&cm_info))
3680                         return -ENOMEM;
3681
3682                 err = nes_manage_apbvt(nesvnic, cm_node->mapped_loc_port,
3683                                        PCI_FUNC(nesvnic->nesdev->pcidev->devfn),
3684                                        NES_MANAGE_APBVT_ADD);
3685                 if (err) {
3686                         printk(KERN_ERR "nes_manage_apbvt call returned %d.\n",
3687                                err);
3688                         g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node);
3689                         return err;
3690                 }
3691                 atomic_inc(&cm_listens_created);
3692         }
3693
3694         cm_id->add_ref(cm_id);
3695         cm_id->provider_data = (void *)cm_node;
3696
3697
3698         return 0;
3699 }
3700
3701
3702 /**
3703  * nes_destroy_listen
3704  */
3705 int nes_destroy_listen(struct iw_cm_id *cm_id)
3706 {
3707         if (cm_id->provider_data)
3708                 g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data);
3709         else
3710                 nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n");
3711
3712         cm_id->rem_ref(cm_id);
3713
3714         return 0;
3715 }
3716
3717
3718 /**
3719  * nes_cm_recv
3720  */
3721 int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice)
3722 {
3723         int rc = 0;
3724
3725         cm_packets_received++;
3726         if ((g_cm_core) && (g_cm_core->api))
3727                 rc = g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb);
3728         else
3729                 nes_debug(NES_DBG_CM, "Unable to process packet for CM,"
3730                           " cm is not setup properly.\n");
3731
3732         return rc;
3733 }
3734
3735
3736 /**
3737  * nes_cm_start
3738  * Start and init a cm core module
3739  */
3740 int nes_cm_start(void)
3741 {
3742         nes_debug(NES_DBG_CM, "\n");
3743         /* create the primary CM core, pass this handle to subsequent core inits */
3744         g_cm_core = nes_cm_alloc_core();
3745         if (g_cm_core)
3746                 return 0;
3747         else
3748                 return -ENOMEM;
3749 }
3750
3751
3752 /**
3753  * nes_cm_stop
3754  * stop and dealloc all cm core instances
3755  */
3756 int nes_cm_stop(void)
3757 {
3758         g_cm_core->api->destroy_cm_core(g_cm_core);
3759         return 0;
3760 }
3761
3762
3763 /**
3764  * cm_event_connected
3765  * handle a connected event, setup QPs and HW
3766  */
3767 static void cm_event_connected(struct nes_cm_event *event)
3768 {
3769         struct nes_qp *nesqp;
3770         struct nes_vnic *nesvnic;
3771         struct nes_device *nesdev;
3772         struct nes_cm_node *cm_node;
3773         struct nes_adapter *nesadapter;
3774         struct ib_qp_attr attr;
3775         struct iw_cm_id *cm_id;
3776         struct iw_cm_event cm_event;
3777         struct nes_v4_quad nes_quad;
3778         u32 crc_value;
3779         int ret;
3780         struct sockaddr_in *laddr;
3781         struct sockaddr_in *raddr;
3782         struct sockaddr_in *cm_event_laddr;
3783
3784         /* get all our handles */
3785         cm_node = event->cm_node;
3786         cm_id = cm_node->cm_id;
3787         nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id);
3788         nesqp = (struct nes_qp *)cm_id->provider_data;
3789         nesvnic = to_nesvnic(nesqp->ibqp.device);
3790         nesdev = nesvnic->nesdev;
3791         nesadapter = nesdev->nesadapter;
3792         laddr = (struct sockaddr_in *)&cm_id->local_addr;
3793         raddr = (struct sockaddr_in *)&cm_id->remote_addr;
3794         cm_event_laddr = (struct sockaddr_in *)&cm_event.local_addr;
3795
3796         if (nesqp->destroyed)
3797                 return;
3798         atomic_inc(&cm_connecteds);
3799         nes_debug(NES_DBG_CM, "QP%u attempting to connect to  0x%08X:0x%04X on"
3800                   " local port 0x%04X. jiffies = %lu.\n",
3801                   nesqp->hwqp.qp_id, ntohl(raddr->sin_addr.s_addr),
3802                   ntohs(raddr->sin_port), ntohs(laddr->sin_port), jiffies);
3803
3804         nes_cm_init_tsa_conn(nesqp, cm_node);
3805
3806         /* set the QP tsa context */
3807         nesqp->nesqp_context->tcpPorts[0] =
3808                         cpu_to_le16(cm_node->mapped_loc_port);
3809         nesqp->nesqp_context->tcpPorts[1] =
3810                         cpu_to_le16(cm_node->mapped_rem_port);
3811         nesqp->nesqp_context->ip0 = cpu_to_le32(cm_node->mapped_rem_addr);
3812
3813         nesqp->nesqp_context->misc2 |= cpu_to_le32(
3814                         (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3815                         NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3816         nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
3817                         nes_arp_table(nesdev,
3818                         le32_to_cpu(nesqp->nesqp_context->ip0),
3819                         NULL, NES_ARP_RESOLVE) << 16);
3820         nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3821                         jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3822         nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3823         nesqp->nesqp_context->ird_ord_sizes |=
3824                         cpu_to_le32((u32)1 <<
3825                         NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT);
3826         nesqp->nesqp_context->ird_ord_sizes |=
3827                         cpu_to_le32((u32)cm_node->ord_size);
3828
3829         /* Adjust tail for not having a LSMM */
3830         /*nesqp->hwqp.sq_tail = 1;*/
3831
3832         build_rdma0_msg(cm_node, &nesqp);
3833
3834         nes_write32(nesdev->regs + NES_WQE_ALLOC,
3835                     (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3836
3837         memset(&nes_quad, 0, sizeof(nes_quad));
3838
3839         nes_quad.DstIpAdrIndex =
3840                 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3841         nes_quad.SrcIpadr = htonl(cm_node->mapped_rem_addr);
3842         nes_quad.TcpPorts[0] = htons(cm_node->mapped_rem_port);
3843         nes_quad.TcpPorts[1] = htons(cm_node->mapped_loc_port);
3844
3845         /* Produce hash key */
3846         crc_value = get_crc_value(&nes_quad);
3847         nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3848         nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
3849                   nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
3850
3851         nesqp->hte_index &= nesadapter->hte_index_mask;
3852         nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3853
3854         nesqp->ietf_frame = &cm_node->mpa_frame;
3855         nesqp->private_data_len = (u8)cm_node->mpa_frame_size;
3856         cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3857
3858         /* notify OF layer we successfully created the requested connection */
3859         cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3860         cm_event.status = 0;
3861         cm_event.provider_data = cm_id->provider_data;
3862         cm_event_laddr->sin_family = AF_INET;
3863         cm_event_laddr->sin_port = laddr->sin_port;
3864         cm_event.remote_addr = cm_id->remote_addr;
3865
3866         cm_event.private_data = (void *)event->cm_node->mpa_frame_buf;
3867         cm_event.private_data_len = (u8)event->cm_node->mpa_frame_size;
3868         cm_event.ird = cm_node->ird_size;
3869         cm_event.ord = cm_node->ord_size;
3870
3871         cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3872         ret = cm_id->event_handler(cm_id, &cm_event);
3873         nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3874
3875         if (ret)
3876                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3877                        "ret=%d\n", __func__, __LINE__, ret);
3878         attr.qp_state = IB_QPS_RTS;
3879         nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3880
3881         nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = "
3882                   "%lu\n", nesqp->hwqp.qp_id, jiffies);
3883
3884         return;
3885 }
3886
3887
3888 /**
3889  * cm_event_connect_error
3890  */
3891 static void cm_event_connect_error(struct nes_cm_event *event)
3892 {
3893         struct nes_qp *nesqp;
3894         struct iw_cm_id *cm_id;
3895         struct iw_cm_event cm_event;
3896         /* struct nes_cm_info cm_info; */
3897         int ret;
3898
3899         if (!event->cm_node)
3900                 return;
3901
3902         cm_id = event->cm_node->cm_id;
3903         if (!cm_id)
3904                 return;
3905
3906         nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id);
3907         nesqp = cm_id->provider_data;
3908
3909         if (!nesqp)
3910                 return;
3911
3912         /* notify OF layer about this connection error event */
3913         /* cm_id->rem_ref(cm_id); */
3914         nesqp->cm_id = NULL;
3915         cm_id->provider_data = NULL;
3916         cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3917         cm_event.status = -ECONNRESET;
3918         cm_event.provider_data = cm_id->provider_data;
3919         cm_event.local_addr = cm_id->local_addr;
3920         cm_event.remote_addr = cm_id->remote_addr;
3921         cm_event.private_data = NULL;
3922         cm_event.private_data_len = 0;
3923
3924 #ifdef CONFIG_INFINIBAND_NES_DEBUG
3925         {
3926                 struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
3927                                                      &cm_event.local_addr;
3928                 struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
3929                                                      &cm_event.remote_addr;
3930                 nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, remote_addr=%08x\n",
3931                           cm_event_laddr->sin_addr.s_addr, cm_event_raddr->sin_addr.s_addr);
3932         }
3933 #endif
3934
3935         ret = cm_id->event_handler(cm_id, &cm_event);
3936         nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3937         if (ret)
3938                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3939                        "ret=%d\n", __func__, __LINE__, ret);
3940         cm_id->rem_ref(cm_id);
3941
3942         rem_ref_cm_node(event->cm_node->cm_core, event->cm_node);
3943         return;
3944 }
3945
3946
3947 /**
3948  * cm_event_reset
3949  */
3950 static void cm_event_reset(struct nes_cm_event *event)
3951 {
3952         struct nes_qp *nesqp;
3953         struct iw_cm_id *cm_id;
3954         struct iw_cm_event cm_event;
3955         /* struct nes_cm_info cm_info; */
3956         int ret;
3957
3958         if (!event->cm_node)
3959                 return;
3960
3961         if (!event->cm_node->cm_id)
3962                 return;
3963
3964         cm_id = event->cm_node->cm_id;
3965
3966         nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id);
3967         nesqp = cm_id->provider_data;
3968         if (!nesqp)
3969                 return;
3970
3971         nesqp->cm_id = NULL;
3972         /* cm_id->provider_data = NULL; */
3973         cm_event.event = IW_CM_EVENT_DISCONNECT;
3974         cm_event.status = -ECONNRESET;
3975         cm_event.provider_data = cm_id->provider_data;
3976         cm_event.local_addr = cm_id->local_addr;
3977         cm_event.remote_addr = cm_id->remote_addr;
3978         cm_event.private_data = NULL;
3979         cm_event.private_data_len = 0;
3980
3981         cm_id->add_ref(cm_id);
3982         ret = cm_id->event_handler(cm_id, &cm_event);
3983         atomic_inc(&cm_closes);
3984         cm_event.event = IW_CM_EVENT_CLOSE;
3985         cm_event.status = 0;
3986         cm_event.provider_data = cm_id->provider_data;
3987         cm_event.local_addr = cm_id->local_addr;
3988         cm_event.remote_addr = cm_id->remote_addr;
3989         cm_event.private_data = NULL;
3990         cm_event.private_data_len = 0;
3991         nes_debug(NES_DBG_CM, "NODE %p Generating CLOSE\n", event->cm_node);
3992         ret = cm_id->event_handler(cm_id, &cm_event);
3993
3994         nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3995
3996
3997         /* notify OF layer about this connection error event */
3998         cm_id->rem_ref(cm_id);
3999
4000         return;
4001 }
4002
4003
4004 /**
4005  * cm_event_mpa_req
4006  */
4007 static void cm_event_mpa_req(struct nes_cm_event *event)
4008 {
4009         struct iw_cm_id *cm_id;
4010         struct iw_cm_event cm_event;
4011         int ret;
4012         struct nes_cm_node *cm_node;
4013         struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
4014                                              &cm_event.local_addr;
4015         struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
4016                                              &cm_event.remote_addr;
4017
4018         cm_node = event->cm_node;
4019         if (!cm_node)
4020                 return;
4021         cm_id = cm_node->cm_id;
4022
4023         atomic_inc(&cm_connect_reqs);
4024         nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
4025                   cm_node, cm_id, jiffies);
4026
4027         cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
4028         cm_event.status = 0;
4029         cm_event.provider_data = (void *)cm_node;
4030
4031         cm_event_laddr->sin_family = AF_INET;
4032         cm_event_laddr->sin_port = htons(event->cm_info.loc_port);
4033         cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.loc_addr);
4034
4035         cm_event_raddr->sin_family = AF_INET;
4036         cm_event_raddr->sin_port = htons(event->cm_info.rem_port);
4037         cm_event_raddr->sin_addr.s_addr = htonl(event->cm_info.rem_addr);
4038         cm_event.private_data = cm_node->mpa_frame_buf;
4039         cm_event.private_data_len = (u8)cm_node->mpa_frame_size;
4040         if (cm_node->mpa_frame_rev == IETF_MPA_V1) {
4041                 cm_event.ird = NES_MAX_IRD;
4042                 cm_event.ord = NES_MAX_ORD;
4043         } else {
4044         cm_event.ird = cm_node->ird_size;
4045         cm_event.ord = cm_node->ord_size;
4046         }
4047
4048         ret = cm_id->event_handler(cm_id, &cm_event);
4049         if (ret)
4050                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
4051                        __func__, __LINE__, ret);
4052         return;
4053 }
4054
4055
4056 static void cm_event_mpa_reject(struct nes_cm_event *event)
4057 {
4058         struct iw_cm_id *cm_id;
4059         struct iw_cm_event cm_event;
4060         struct nes_cm_node *cm_node;
4061         int ret;
4062         struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
4063                                              &cm_event.local_addr;
4064         struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
4065                                              &cm_event.remote_addr;
4066
4067         cm_node = event->cm_node;
4068         if (!cm_node)
4069                 return;
4070         cm_id = cm_node->cm_id;
4071
4072         atomic_inc(&cm_connect_reqs);
4073         nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
4074                   cm_node, cm_id, jiffies);
4075
4076         cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
4077         cm_event.status = -ECONNREFUSED;
4078         cm_event.provider_data = cm_id->provider_data;
4079
4080         cm_event_laddr->sin_family = AF_INET;
4081         cm_event_laddr->sin_port = htons(event->cm_info.loc_port);
4082         cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.loc_addr);
4083
4084         cm_event_raddr->sin_family = AF_INET;
4085         cm_event_raddr->sin_port = htons(event->cm_info.rem_port);
4086         cm_event_raddr->sin_addr.s_addr = htonl(event->cm_info.rem_addr);
4087
4088         cm_event.private_data = cm_node->mpa_frame_buf;
4089         cm_event.private_data_len = (u8)cm_node->mpa_frame_size;
4090
4091         nes_debug(NES_DBG_CM, "call CM_EVENT_MPA_REJECTED, local_addr=%08x, "
4092                   "remove_addr=%08x\n",
4093                   cm_event_laddr->sin_addr.s_addr,
4094                   cm_event_raddr->sin_addr.s_addr);
4095
4096         ret = cm_id->event_handler(cm_id, &cm_event);
4097         if (ret)
4098                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
4099                        __func__, __LINE__, ret);
4100
4101         return;
4102 }
4103
4104
4105 static void nes_cm_event_handler(struct work_struct *);
4106
4107 /**
4108  * nes_cm_post_event
4109  * post an event to the cm event handler
4110  */
4111 static int nes_cm_post_event(struct nes_cm_event *event)
4112 {
4113         atomic_inc(&event->cm_node->cm_core->events_posted);
4114         add_ref_cm_node(event->cm_node);
4115         event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
4116         INIT_WORK(&event->event_work, nes_cm_event_handler);
4117         nes_debug(NES_DBG_CM, "cm_node=%p queue_work, event=%p\n",
4118                   event->cm_node, event);
4119
4120         queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
4121
4122         nes_debug(NES_DBG_CM, "Exit\n");
4123         return 0;
4124 }
4125
4126
4127 /**
4128  * nes_cm_event_handler
4129  * worker function to handle cm events
4130  * will free instance of nes_cm_event
4131  */
4132 static void nes_cm_event_handler(struct work_struct *work)
4133 {
4134         struct nes_cm_event *event = container_of(work, struct nes_cm_event,
4135                                                   event_work);
4136         struct nes_cm_core *cm_core;
4137
4138         if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core))
4139                 return;
4140
4141         cm_core = event->cm_node->cm_core;
4142         nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n",
4143                   event, event->type, atomic_read(&cm_core->events_posted));
4144
4145         switch (event->type) {
4146         case NES_CM_EVENT_MPA_REQ:
4147                 cm_event_mpa_req(event);
4148                 nes_debug(NES_DBG_CM, "cm_node=%p CM Event: MPA REQUEST\n",
4149                           event->cm_node);
4150                 break;
4151         case NES_CM_EVENT_RESET:
4152                 nes_debug(NES_DBG_CM, "cm_node = %p CM Event: RESET\n",
4153                           event->cm_node);
4154                 cm_event_reset(event);
4155                 break;
4156         case NES_CM_EVENT_CONNECTED:
4157                 if ((!event->cm_node->cm_id) ||
4158                     (event->cm_node->state != NES_CM_STATE_TSA))
4159                         break;
4160                 cm_event_connected(event);
4161                 nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n");
4162                 break;
4163         case NES_CM_EVENT_MPA_REJECT:
4164                 if ((!event->cm_node->cm_id) ||
4165                     (event->cm_node->state == NES_CM_STATE_TSA))
4166                         break;
4167                 cm_event_mpa_reject(event);
4168                 nes_debug(NES_DBG_CM, "CM Event: REJECT\n");
4169                 break;
4170
4171         case NES_CM_EVENT_ABORTED:
4172                 if ((!event->cm_node->cm_id) ||
4173                     (event->cm_node->state == NES_CM_STATE_TSA))
4174                         break;
4175                 cm_event_connect_error(event);
4176                 nes_debug(NES_DBG_CM, "CM Event: ABORTED\n");
4177                 break;
4178         case NES_CM_EVENT_DROPPED_PKT:
4179                 nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n");
4180                 break;
4181         default:
4182                 nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n");
4183                 break;
4184         }
4185
4186         atomic_dec(&cm_core->events_posted);
4187         event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
4188         rem_ref_cm_node(cm_core, event->cm_node);
4189         kfree(event);
4190
4191         return;
4192 }