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