drivers/infiniband/hw/i40iw/i40iw_cm.c

   1 /*******************************************************************************
   2 *
   3 * Copyright (c) 2015-2016 Intel Corporation.  All rights reserved.
   4 *
   5 * This software is available to you under a choice of one of two
   6 * licenses.  You may choose to be licensed under the terms of the GNU
   7 * General Public License (GPL) Version 2, available from the file
   8 * COPYING in the main directory of this source tree, or the
   9 * OpenFabrics.org BSD license below:
  10 *
  11 *   Redistribution and use in source and binary forms, with or
  12 *   without modification, are permitted provided that the following
  13 *   conditions are met:
  14 *
  15 *    - Redistributions of source code must retain the above
  16 *       copyright notice, this list of conditions and the following
  17 *       disclaimer.
  18 *
  19 *    - Redistributions in binary form must reproduce the above
  20 *       copyright notice, this list of conditions and the following
  21 *       disclaimer in the documentation and/or other materials
  22 *       provided with the distribution.
  23 *
  24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  31 * SOFTWARE.
  32 *
  33 *******************************************************************************/
  34
  35 #include <linux/atomic.h>
  36 #include <linux/ip.h>
  37 #include <linux/tcp.h>
  38 #include <linux/init.h>
  39 #include <linux/if_arp.h>
  40 #include <linux/if_vlan.h>
  41 #include <linux/notifier.h>
  42 #include <linux/net.h>
  43 #include <linux/types.h>
  44 #include <linux/timer.h>
  45 #include <linux/time.h>
  46 #include <linux/delay.h>
  47 #include <linux/etherdevice.h>
  48 #include <linux/netdevice.h>
  49 #include <linux/random.h>
  50 #include <linux/list.h>
  51 #include <linux/threads.h>
  52 #include <linux/highmem.h>
  53 #include <net/arp.h>
  54 #include <net/ndisc.h>
  55 #include <net/neighbour.h>
  56 #include <net/route.h>
  57 #include <net/addrconf.h>
  58 #include <net/ip6_route.h>
  59 #include <net/ip_fib.h>
  60 #include <net/tcp.h>
  61 #include <asm/checksum.h>
  62
  63 #include "i40iw.h"
  64
  65 static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *);
  66 static void i40iw_cm_post_event(struct i40iw_cm_event *event);
  67 static void i40iw_disconnect_worker(struct work_struct *work);
  68
  69 /**
  70  * i40iw_free_sqbuf - put back puda buffer if refcount = 0
  71  * @dev: FPK device
  72  * @buf: puda buffer to free
  73  */
  74 void i40iw_free_sqbuf(struct i40iw_sc_dev *dev, void *bufp)
  75 {
  76         struct i40iw_puda_buf *buf = (struct i40iw_puda_buf *)bufp;
  77         struct i40iw_puda_rsrc *ilq = dev->ilq;
  78
  79         if (!atomic_dec_return(&buf->refcount))
  80                 i40iw_puda_ret_bufpool(ilq, buf);
  81 }
  82
  83 /**
  84  * i40iw_derive_hw_ird_setting - Calculate IRD
  85  *
  86  * @cm_ird: IRD of connection's node
  87  *
  88  * The ird from the connection is rounded to a supported HW
  89  * setting (2,8,32,64) and then encoded for ird_size field of
  90  * qp_ctx
  91  */
  92 static u8 i40iw_derive_hw_ird_setting(u16 cm_ird)
  93 {
  94         u8 encoded_ird_size;
  95         u8 pof2_cm_ird = 1;
  96
  97         /* round-off to next powerof2 */
  98         while (pof2_cm_ird < cm_ird)
  99                 pof2_cm_ird *= 2;
 100
 101         /* ird_size field is encoded in qp_ctx */
 102         switch (pof2_cm_ird) {
 103         case I40IW_HW_IRD_SETTING_64:
 104                 encoded_ird_size = 3;
 105                 break;
 106         case I40IW_HW_IRD_SETTING_32:
 107         case I40IW_HW_IRD_SETTING_16:
 108                 encoded_ird_size = 2;
 109                 break;
 110         case I40IW_HW_IRD_SETTING_8:
 111         case I40IW_HW_IRD_SETTING_4:
 112                 encoded_ird_size = 1;
 113                 break;
 114         case I40IW_HW_IRD_SETTING_2:
 115         default:
 116                 encoded_ird_size = 0;
 117                 break;
 118         }
 119         return encoded_ird_size;
 120 }
 121
 122 /**
 123  * i40iw_record_ird_ord - Record IRD/ORD passed in
 124  * @cm_node: connection's node
 125  * @conn_ird: connection IRD
 126  * @conn_ord: connection ORD
 127  */
 128 static void i40iw_record_ird_ord(struct i40iw_cm_node *cm_node, u16 conn_ird, u16 conn_ord)
 129 {
 130         if (conn_ird > I40IW_MAX_IRD_SIZE)
 131                 conn_ird = I40IW_MAX_IRD_SIZE;
 132
 133         if (conn_ord > I40IW_MAX_ORD_SIZE)
 134                 conn_ord = I40IW_MAX_ORD_SIZE;
 135
 136         cm_node->ird_size = conn_ird;
 137         cm_node->ord_size = conn_ord;
 138 }
 139
 140 /**
 141  * i40iw_copy_ip_ntohl - change network to host ip
 142  * @dst: host ip
 143  * @src: big endian
 144  */
 145 void i40iw_copy_ip_ntohl(u32 *dst, __be32 *src)
 146 {
 147         *dst++ = ntohl(*src++);
 148         *dst++ = ntohl(*src++);
 149         *dst++ = ntohl(*src++);
 150         *dst = ntohl(*src);
 151 }
 152
 153 /**
 154  * i40iw_copy_ip_htonl - change host addr to network ip
 155  * @dst: host ip
 156  * @src: little endian
 157  */
 158 static inline void i40iw_copy_ip_htonl(__be32 *dst, u32 *src)
 159 {
 160         *dst++ = htonl(*src++);
 161         *dst++ = htonl(*src++);
 162         *dst++ = htonl(*src++);
 163         *dst = htonl(*src);
 164 }
 165
 166 /**
 167  * i40iw_fill_sockaddr4 - get addr info for passive connection
 168  * @cm_node: connection's node
 169  * @event: upper layer's cm event
 170  */
 171 static inline void i40iw_fill_sockaddr4(struct i40iw_cm_node *cm_node,
 172                                         struct iw_cm_event *event)
 173 {
 174         struct sockaddr_in *laddr = (struct sockaddr_in *)&event->local_addr;
 175         struct sockaddr_in *raddr = (struct sockaddr_in *)&event->remote_addr;
 176
 177         laddr->sin_family = AF_INET;
 178         raddr->sin_family = AF_INET;
 179
 180         laddr->sin_port = htons(cm_node->loc_port);
 181         raddr->sin_port = htons(cm_node->rem_port);
 182
 183         laddr->sin_addr.s_addr = htonl(cm_node->loc_addr[0]);
 184         raddr->sin_addr.s_addr = htonl(cm_node->rem_addr[0]);
 185 }
 186
 187 /**
 188  * i40iw_fill_sockaddr6 - get ipv6 addr info for passive side
 189  * @cm_node: connection's node
 190  * @event: upper layer's cm event
 191  */
 192 static inline void i40iw_fill_sockaddr6(struct i40iw_cm_node *cm_node,
 193                                         struct iw_cm_event *event)
 194 {
 195         struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)&event->local_addr;
 196         struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)&event->remote_addr;
 197
 198         laddr6->sin6_family = AF_INET6;
 199         raddr6->sin6_family = AF_INET6;
 200
 201         laddr6->sin6_port = htons(cm_node->loc_port);
 202         raddr6->sin6_port = htons(cm_node->rem_port);
 203
 204         i40iw_copy_ip_htonl(laddr6->sin6_addr.in6_u.u6_addr32,
 205                             cm_node->loc_addr);
 206         i40iw_copy_ip_htonl(raddr6->sin6_addr.in6_u.u6_addr32,
 207                             cm_node->rem_addr);
 208 }
 209
 210 /**
 211  * i40iw_set_sockaddr - Record ip addr and tcp port in a sockaddr storage
 212  * @ip_addr: v4/v6 ip addr
 213  * @port: tcp port
 214  * @addr: sockaddr to store ip/tcp info
 215  */
 216 static void i40iw_set_sockaddr(u32 *ip_addr,
 217                                u16 port,
 218                                struct sockaddr_storage *addr,
 219                                bool ipv4)
 220 {
 221         if (ipv4) {
 222                 struct sockaddr_in *in4_addr = (struct sockaddr_in *)addr;
 223
 224                 in4_addr->sin_family = AF_INET;
 225                 in4_addr->sin_addr.s_addr = htonl(ip_addr[0]);
 226                 in4_addr->sin_port = htons(port);
 227         } else {
 228                 struct sockaddr_in6 *in6_addr = (struct sockaddr_in6 *)addr;
 229
 230                 in6_addr->sin6_family = AF_INET6;
 231                 i40iw_copy_ip_htonl(in6_addr->sin6_addr.in6_u.u6_addr32,
 232                                     ip_addr);
 233                 in6_addr->sin6_port = htons(port);
 234         }
 235 }
 236
 237 /**
 238  * i40iw_get_sockaddr - Get ip addr and tcp port from a sockaddr storage
 239  * @addr: sockaddr to get ip/tcp info
 240  * @ip_addr: v4/v6 ip addr
 241  * @port: tcp port
 242  */
 243 static void i40iw_get_addrinfo(struct sockaddr_storage *addr, u32 *ip_addr, u16 *port)
 244 {
 245         if (addr->ss_family == AF_INET) {
 246                 struct sockaddr_in *in4_addr = (struct sockaddr_in *)addr;
 247
 248                 ip_addr[0] = ntohl(in4_addr->sin_addr.s_addr);
 249                 *port = ntohs(in4_addr->sin_port);
 250         } else {
 251                 struct sockaddr_in6 *in6_addr = (struct sockaddr_in6 *)addr;
 252
 253                 i40iw_copy_ip_ntohl(ip_addr,
 254                                     in6_addr->sin6_addr.in6_u.u6_addr32);
 255                 *port = ntohs(in6_addr->sin6_port);
 256         }
 257 }
 258
 259 /**
 260  * i40iw_is_wildcard - Check if it is a wildcard ip address
 261  * @addr: sockaddr containing the ip to check
 262  */
 263 static bool i40iw_is_wildcard(struct sockaddr_storage *addr)
 264 {
 265         if (addr->ss_family == AF_INET) {
 266                 struct sockaddr_in *in4_addr = (struct sockaddr_in *)addr;
 267
 268                 return (in4_addr->sin_addr.s_addr == INADDR_ANY);
 269         } else {
 270                 struct sockaddr_in6 *in6_addr = (struct sockaddr_in6 *)addr;
 271
 272                 return (ipv6_addr_type(&in6_addr->sin6_addr) == IPV6_ADDR_ANY);
 273         }
 274 }
 275
 276 /**
 277  * i40iw_create_mapinfo - Create a mapinfo object in the port mapper data base
 278  * @cm_info: contains ip/tcp info
 279  */
 280 static int i40iw_create_mapinfo(struct i40iw_cm_info *cm_info)
 281 {
 282         struct sockaddr_storage local_sockaddr;
 283         struct sockaddr_storage mapped_sockaddr;
 284
 285         i40iw_set_sockaddr(cm_info->loc_addr, cm_info->loc_port,
 286                            &local_sockaddr, cm_info->ipv4);
 287         i40iw_set_sockaddr(cm_info->map_loc_addr, cm_info->map_loc_port,
 288                            &mapped_sockaddr, cm_info->ipv4);
 289         return iwpm_create_mapinfo(&local_sockaddr,
 290                                    &mapped_sockaddr,
 291                                    RDMA_NL_I40IW);
 292 }
 293
 294 /**
 295  * i40iw_remove_mapinfo - Remove a mapinfo object
 296  * @cm_info: contains ip/tcp info
 297  *
 298  * Removes a mapinfo object from the port mapper data base
 299  * and sends a remove mapping message to the userspace port mapper
 300  */
 301 static int i40iw_remove_mapinfo(struct i40iw_cm_info *cm_info)
 302 {
 303         struct sockaddr_storage local_sockaddr;
 304         struct sockaddr_storage mapped_sockaddr;
 305
 306         i40iw_set_sockaddr(cm_info->loc_addr, cm_info->loc_port,
 307                            &local_sockaddr, cm_info->ipv4);
 308         i40iw_set_sockaddr(cm_info->map_loc_addr, cm_info->map_loc_port,
 309                            &mapped_sockaddr, cm_info->ipv4);
 310
 311         iwpm_remove_mapinfo(&local_sockaddr, &mapped_sockaddr);
 312         return iwpm_remove_mapping(&local_sockaddr, RDMA_NL_I40IW);
 313 }
 314
 315 /**
 316  * i40iw_form_reg_msg - Form a port mapper message with dev info
 317  * @iwdev: iWarp device
 318  * @pm_msg: msg to record device data
 319  */
 320 static void i40iw_form_reg_msg(struct i40iw_device *iwdev, struct iwpm_dev_data *pm_msg)
 321 {
 322         memcpy(pm_msg->dev_name, iwdev->iwibdev->ibdev.name, IWPM_DEVNAME_SIZE);
 323         memcpy(pm_msg->if_name, iwdev->netdev->name, IWPM_IFNAME_SIZE);
 324 }
 325
 326 /**
 327  * i40iw_form_pm_msg - Form a port mapper message with mapping info
 328  * @cm_info: contains ip/tcp info
 329  * @pm_msg: msg to record ip/tcp info
 330  */
 331 static void i40iw_form_pm_msg(struct i40iw_cm_info *cm_info,
 332                               struct iwpm_sa_data *pm_msg)
 333 {
 334         i40iw_set_sockaddr(cm_info->loc_addr, cm_info->loc_port,
 335                            &pm_msg->loc_addr, cm_info->ipv4);
 336         i40iw_set_sockaddr(cm_info->rem_addr, cm_info->rem_port,
 337                            &pm_msg->rem_addr, cm_info->ipv4);
 338 }
 339
 340 /**
 341  * i40iw_record_pm_msg - Record the received mapping info
 342  * @cm_info: ip/tcp info to be updated with mapped info
 343  * @pm_msg: received msg with mapped ip/tcp
 344  */
 345 static void i40iw_record_pm_msg(struct i40iw_cm_info *cm_info,
 346                                 struct iwpm_sa_data *pm_msg,
 347                                 bool remote)
 348 {
 349         i40iw_get_addrinfo(&pm_msg->mapped_loc_addr,
 350                            cm_info->map_loc_addr,
 351                            &cm_info->map_loc_port);
 352         if (remote) {
 353                 i40iw_get_addrinfo(&pm_msg->mapped_rem_addr,
 354                                    cm_info->map_rem_addr, &cm_info->map_rem_port);
 355                 if (i40iw_is_wildcard(&pm_msg->mapped_rem_addr))
 356                         memcpy(cm_info->map_rem_addr, cm_info->rem_addr,
 357                                sizeof(cm_info->map_rem_addr));
 358         }
 359 }
 360
 361 /**
 362  * i40iw_get_reminfo - Get the address info of the remote connecting peer
 363  * @cm_node: provides mapped ip/tcp info (local and remote)
 364  *
 365  * Gets the actual non-mapped ip/tcp info of the remote connecting peer
 366  * from the port mapper data base
 367  */
 368 static int i40iw_get_remote_addr(struct i40iw_cm_node *cm_node)
 369 {
 370         struct sockaddr_storage mapped_loc_addr, mapped_rem_addr;
 371         struct sockaddr_storage remote_addr;
 372         int ret;
 373
 374         i40iw_set_sockaddr(cm_node->map_loc_addr,
 375                            cm_node->map_loc_port,
 376                            &mapped_loc_addr,
 377                            cm_node->ipv4);
 378         i40iw_set_sockaddr(cm_node->map_rem_addr,
 379                            cm_node->map_rem_port,
 380                            &mapped_rem_addr,
 381                            cm_node->ipv4);
 382         ret = iwpm_get_remote_info(&mapped_loc_addr,
 383                                    &mapped_rem_addr,
 384                                    &remote_addr,
 385                                    RDMA_NL_I40IW);
 386         if (ret)
 387                 i40iw_debug(cm_node->dev,
 388                             I40IW_DEBUG_CM,
 389                             "Unable to find remote peer address info\n");
 390         else
 391                 i40iw_get_addrinfo(&remote_addr,
 392                                    cm_node->rem_addr,
 393                                    &cm_node->rem_port);
 394         return ret;
 395 }
 396
 397 /**
 398  * i40iw_init_mapinfo - Initialize the mapped ip/tcp info
 399  * @cm_info: ip/tcp info (actual and mapped)
 400 */
 401 static void i40iw_init_mapinfo(struct i40iw_cm_info *cm_info)
 402 {
 403         memcpy(cm_info->map_loc_addr, cm_info->loc_addr,
 404                sizeof(cm_info->map_loc_addr));
 405         memcpy(cm_info->map_rem_addr, cm_info->rem_addr,
 406                sizeof(cm_info->map_rem_addr));
 407         cm_info->map_loc_port = cm_info->loc_port;
 408         cm_info->map_rem_port = cm_info->rem_port;
 409 }
 410
 411 /**
 412  * i40iw_get_addr_info
 413  * @cm_node: contains ip/tcp info
 414  * @cm_info: to get a copy of the cm_node ip/tcp info
 415 */
 416 static void i40iw_get_addr_info(struct i40iw_cm_node *cm_node,
 417                                 struct i40iw_cm_info *cm_info)
 418 {
 419         cm_info->ipv4 = cm_node->ipv4;
 420         cm_info->vlan_id = cm_node->vlan_id;
 421         memcpy(cm_info->loc_addr, cm_node->loc_addr, sizeof(cm_info->loc_addr));
 422         memcpy(cm_info->rem_addr, cm_node->rem_addr, sizeof(cm_info->rem_addr));
 423         memcpy(cm_info->map_loc_addr, cm_node->map_loc_addr, sizeof(cm_info->map_loc_addr));
 424         memcpy(cm_info->map_rem_addr, cm_node->map_rem_addr, sizeof(cm_info->map_rem_addr));
 425         cm_info->loc_port = cm_node->loc_port;
 426         cm_info->rem_port = cm_node->rem_port;
 427         cm_info->map_loc_port = cm_node->map_loc_port;
 428         cm_info->map_rem_port = cm_node->map_rem_port;
 429 }
 430
 431 /**
 432  * i40iw_get_cmevent_info - for cm event upcall
 433  * @cm_node: connection's node
 434  * @cm_id: upper layers cm struct for the event
 435  * @event: upper layer's cm event
 436  */
 437 static inline void i40iw_get_cmevent_info(struct i40iw_cm_node *cm_node,
 438                                           struct iw_cm_id *cm_id,
 439                                           struct iw_cm_event *event)
 440 {
 441         memcpy(&event->local_addr, &cm_id->local_addr,
 442                sizeof(event->local_addr));
 443         memcpy(&event->remote_addr, &cm_id->remote_addr,
 444                sizeof(event->remote_addr));
 445         if (cm_node) {
 446                 event->private_data = (void *)cm_node->pdata_buf;
 447                 event->private_data_len = (u8)cm_node->pdata.size;
 448                 event->ird = cm_node->ird_size;
 449                 event->ord = cm_node->ord_size;
 450         }
 451 }
 452
 453 /**
 454  * i40iw_send_cm_event - upcall cm's event handler
 455  * @cm_node: connection's node
 456  * @cm_id: upper layer's cm info struct
 457  * @type: Event type to indicate
 458  * @status: status for the event type
 459  */
 460 static int i40iw_send_cm_event(struct i40iw_cm_node *cm_node,
 461                                struct iw_cm_id *cm_id,
 462                                enum iw_cm_event_type type,
 463                                int status)
 464 {
 465         struct iw_cm_event event;
 466
 467         memset(&event, 0, sizeof(event));
 468         event.event = type;
 469         event.status = status;
 470         switch (type) {
 471         case IW_CM_EVENT_CONNECT_REQUEST:
 472                 if (cm_node->ipv4)
 473                         i40iw_fill_sockaddr4(cm_node, &event);
 474                 else
 475                         i40iw_fill_sockaddr6(cm_node, &event);
 476                 event.provider_data = (void *)cm_node;
 477                 event.private_data = (void *)cm_node->pdata_buf;
 478                 event.private_data_len = (u8)cm_node->pdata.size;
 479                 break;
 480         case IW_CM_EVENT_CONNECT_REPLY:
 481                 i40iw_get_cmevent_info(cm_node, cm_id, &event);
 482                 break;
 483         case IW_CM_EVENT_ESTABLISHED:
 484                 event.ird = cm_node->ird_size;
 485                 event.ord = cm_node->ord_size;
 486                 break;
 487         case IW_CM_EVENT_DISCONNECT:
 488                 break;
 489         case IW_CM_EVENT_CLOSE:
 490                 break;
 491         default:
 492                 i40iw_pr_err("event type received type = %d\n", type);
 493                 return -1;
 494         }
 495         return cm_id->event_handler(cm_id, &event);
 496 }
 497
 498 /**
 499  * i40iw_create_event - create cm event
 500  * @cm_node: connection's node
 501  * @type: Event type to generate
 502  */
 503 static struct i40iw_cm_event *i40iw_create_event(struct i40iw_cm_node *cm_node,
 504                                                  enum i40iw_cm_event_type type)
 505 {
 506         struct i40iw_cm_event *event;
 507
 508         if (!cm_node->cm_id)
 509                 return NULL;
 510
 511         event = kzalloc(sizeof(*event), GFP_ATOMIC);
 512
 513         if (!event)
 514                 return NULL;
 515
 516         event->type = type;
 517         event->cm_node = cm_node;
 518         memcpy(event->cm_info.rem_addr, cm_node->rem_addr, sizeof(event->cm_info.rem_addr));
 519         memcpy(event->cm_info.loc_addr, cm_node->loc_addr, sizeof(event->cm_info.loc_addr));
 520         event->cm_info.rem_port = cm_node->rem_port;
 521         event->cm_info.loc_port = cm_node->loc_port;
 522         event->cm_info.cm_id = cm_node->cm_id;
 523
 524         i40iw_debug(cm_node->dev,
 525                     I40IW_DEBUG_CM,
 526                     "node=%p event=%p type=%u dst=%pI4 src=%pI4\n",
 527                     cm_node,
 528                     event,
 529                     type,
 530                     event->cm_info.loc_addr,
 531                     event->cm_info.rem_addr);
 532
 533         i40iw_cm_post_event(event);
 534         return event;
 535 }
 536
 537 /**
 538  * i40iw_free_retrans_entry - free send entry
 539  * @cm_node: connection's node
 540  */
 541 static void i40iw_free_retrans_entry(struct i40iw_cm_node *cm_node)
 542 {
 543         struct i40iw_sc_dev *dev = cm_node->dev;
 544         struct i40iw_timer_entry *send_entry;
 545
 546         send_entry = cm_node->send_entry;
 547         if (send_entry) {
 548                 cm_node->send_entry = NULL;
 549                 i40iw_free_sqbuf(dev, (void *)send_entry->sqbuf);
 550                 kfree(send_entry);
 551                 atomic_dec(&cm_node->ref_count);
 552         }
 553 }
 554
 555 /**
 556  * i40iw_cleanup_retrans_entry - free send entry with lock
 557  * @cm_node: connection's node
 558  */
 559 static void i40iw_cleanup_retrans_entry(struct i40iw_cm_node *cm_node)
 560 {
 561         unsigned long flags;
 562
 563         spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
 564         i40iw_free_retrans_entry(cm_node);
 565         spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
 566 }
 567
 568 static bool is_remote_ne020_or_chelsio(struct i40iw_cm_node *cm_node)
 569 {
 570         if ((cm_node->rem_mac[0] == 0x0) &&
 571             (((cm_node->rem_mac[1] == 0x12) && (cm_node->rem_mac[2] == 0x55)) ||
 572              ((cm_node->rem_mac[1] == 0x07 && (cm_node->rem_mac[2] == 0x43)))))
 573                 return true;
 574         return false;
 575 }
 576
 577 /**
 578  * i40iw_form_cm_frame - get a free packet and build frame
 579  * @cm_node: connection's node ionfo to use in frame
 580  * @options: pointer to options info
 581  * @hdr: pointer mpa header
 582  * @pdata: pointer to private data
 583  * @flags:  indicates FIN or ACK
 584  */
 585 static struct i40iw_puda_buf *i40iw_form_cm_frame(struct i40iw_cm_node *cm_node,
 586                                                   struct i40iw_kmem_info *options,
 587                                                   struct i40iw_kmem_info *hdr,
 588                                                   struct i40iw_kmem_info *pdata,
 589                                                   u8 flags)
 590 {
 591         struct i40iw_puda_buf *sqbuf;
 592         struct i40iw_sc_dev *dev = cm_node->dev;
 593         u8 *buf;
 594
 595         struct tcphdr *tcph;
 596         struct iphdr *iph;
 597         struct ipv6hdr *ip6h;
 598         struct ethhdr *ethh;
 599         u16 packetsize;
 600         u16 eth_hlen = ETH_HLEN;
 601         u32 opts_len = 0;
 602         u32 pd_len = 0;
 603         u32 hdr_len = 0;
 604
 605         sqbuf = i40iw_puda_get_bufpool(dev->ilq);
 606         if (!sqbuf)
 607                 return NULL;
 608         buf = sqbuf->mem.va;
 609
 610         if (options)
 611                 opts_len = (u32)options->size;
 612
 613         if (hdr)
 614                 hdr_len = hdr->size;
 615
 616         if (pdata) {
 617                 pd_len = pdata->size;
 618                 if (!is_remote_ne020_or_chelsio(cm_node))
 619                         pd_len += MPA_ZERO_PAD_LEN;
 620         }
 621
 622         if (cm_node->vlan_id < VLAN_TAG_PRESENT)
 623                 eth_hlen += 4;
 624
 625         if (cm_node->ipv4)
 626                 packetsize = sizeof(*iph) + sizeof(*tcph);
 627         else
 628                 packetsize = sizeof(*ip6h) + sizeof(*tcph);
 629         packetsize += opts_len + hdr_len + pd_len;
 630
 631         memset(buf, 0x00, eth_hlen + packetsize);
 632
 633         sqbuf->totallen = packetsize + eth_hlen;
 634         sqbuf->maclen = eth_hlen;
 635         sqbuf->tcphlen = sizeof(*tcph) + opts_len;
 636         sqbuf->scratch = (void *)cm_node;
 637
 638         ethh = (struct ethhdr *)buf;
 639         buf += eth_hlen;
 640
 641         if (cm_node->ipv4) {
 642                 sqbuf->ipv4 = true;
 643
 644                 iph = (struct iphdr *)buf;
 645                 buf += sizeof(*iph);
 646                 tcph = (struct tcphdr *)buf;
 647                 buf += sizeof(*tcph);
 648
 649                 ether_addr_copy(ethh->h_dest, cm_node->rem_mac);
 650                 ether_addr_copy(ethh->h_source, cm_node->loc_mac);
 651                 if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
 652                         ((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q);
 653                         ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(cm_node->vlan_id);
 654
 655                         ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IP);
 656                 } else {
 657                         ethh->h_proto = htons(ETH_P_IP);
 658                 }
 659
 660                 iph->version = IPVERSION;
 661                 iph->ihl = 5;   /* 5 * 4Byte words, IP headr len */
 662                 iph->tos = 0;
 663                 iph->tot_len = htons(packetsize);
 664                 iph->id = htons(++cm_node->tcp_cntxt.loc_id);
 665
 666                 iph->frag_off = htons(0x4000);
 667                 iph->ttl = 0x40;
 668                 iph->protocol = IPPROTO_TCP;
 669
 670                 iph->saddr = htonl(cm_node->map_loc_addr[0]);
 671                 iph->daddr = htonl(cm_node->map_rem_addr[0]);
 672         } else {
 673                 sqbuf->ipv4 = false;
 674                 ip6h = (struct ipv6hdr *)buf;
 675                 buf += sizeof(*ip6h);
 676                 tcph = (struct tcphdr *)buf;
 677                 buf += sizeof(*tcph);
 678
 679                 ether_addr_copy(ethh->h_dest, cm_node->rem_mac);
 680                 ether_addr_copy(ethh->h_source, cm_node->loc_mac);
 681                 if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
 682                         ((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q);
 683                         ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(cm_node->vlan_id);
 684                         ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IPV6);
 685                 } else {
 686                         ethh->h_proto = htons(ETH_P_IPV6);
 687                 }
 688                 ip6h->version = 6;
 689                 ip6h->flow_lbl[0] = 0;
 690                 ip6h->flow_lbl[1] = 0;
 691                 ip6h->flow_lbl[2] = 0;
 692                 ip6h->payload_len = htons(packetsize - sizeof(*ip6h));
 693                 ip6h->nexthdr = 6;
 694                 ip6h->hop_limit = 128;
 695
 696                 i40iw_copy_ip_htonl(ip6h->saddr.in6_u.u6_addr32,
 697                                     cm_node->map_loc_addr);
 698                 i40iw_copy_ip_htonl(ip6h->daddr.in6_u.u6_addr32,
 699                                     cm_node->map_rem_addr);
 700         }
 701
 702         tcph->source = htons(cm_node->map_loc_port);
 703         tcph->dest = htons(cm_node->map_rem_port);
 704
 705         tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
 706
 707         if (flags & SET_ACK) {
 708                 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
 709                 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
 710                 tcph->ack = 1;
 711         } else {
 712                 tcph->ack_seq = 0;
 713         }
 714
 715         if (flags & SET_SYN) {
 716                 cm_node->tcp_cntxt.loc_seq_num++;
 717                 tcph->syn = 1;
 718         } else {
 719                 cm_node->tcp_cntxt.loc_seq_num += hdr_len + pd_len;
 720         }
 721
 722         if (flags & SET_FIN) {
 723                 cm_node->tcp_cntxt.loc_seq_num++;
 724                 tcph->fin = 1;
 725         }
 726
 727         if (flags & SET_RST)
 728                 tcph->rst = 1;
 729
 730         tcph->doff = (u16)((sizeof(*tcph) + opts_len + 3) >> 2);
 731         sqbuf->tcphlen = tcph->doff << 2;
 732         tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
 733         tcph->urg_ptr = 0;
 734
 735         if (opts_len) {
 736                 memcpy(buf, options->addr, opts_len);
 737                 buf += opts_len;
 738         }
 739
 740         if (hdr_len) {
 741                 memcpy(buf, hdr->addr, hdr_len);
 742                 buf += hdr_len;
 743         }
 744
 745         if (pd_len)
 746                 memcpy(buf, pdata->addr, pd_len);
 747
 748         atomic_set(&sqbuf->refcount, 1);
 749
 750         return sqbuf;
 751 }
 752
 753 /**
 754  * i40iw_send_reset - Send RST packet
 755  * @cm_node: connection's node
 756  */
 757 static int i40iw_send_reset(struct i40iw_cm_node *cm_node)
 758 {
 759         struct i40iw_puda_buf *sqbuf;
 760         int flags = SET_RST | SET_ACK;
 761
 762         sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, flags);
 763         if (!sqbuf) {
 764                 i40iw_pr_err("no sqbuf\n");
 765                 return -1;
 766         }
 767
 768         return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 0, 1);
 769 }
 770
 771 /**
 772  * i40iw_active_open_err - send event for active side cm error
 773  * @cm_node: connection's node
 774  * @reset: Flag to send reset or not
 775  */
 776 static void i40iw_active_open_err(struct i40iw_cm_node *cm_node, bool reset)
 777 {
 778         i40iw_cleanup_retrans_entry(cm_node);
 779         cm_node->cm_core->stats_connect_errs++;
 780         if (reset) {
 781                 i40iw_debug(cm_node->dev,
 782                             I40IW_DEBUG_CM,
 783                             "%s cm_node=%p state=%d\n",
 784                             __func__,
 785                             cm_node,
 786                             cm_node->state);
 787                 atomic_inc(&cm_node->ref_count);
 788                 i40iw_send_reset(cm_node);
 789         }
 790
 791         cm_node->state = I40IW_CM_STATE_CLOSED;
 792         i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
 793 }
 794
 795 /**
 796  * i40iw_passive_open_err - handle passive side cm error
 797  * @cm_node: connection's node
 798  * @reset: send reset or just free cm_node
 799  */
 800 static void i40iw_passive_open_err(struct i40iw_cm_node *cm_node, bool reset)
 801 {
 802         i40iw_cleanup_retrans_entry(cm_node);
 803         cm_node->cm_core->stats_passive_errs++;
 804         cm_node->state = I40IW_CM_STATE_CLOSED;
 805         i40iw_debug(cm_node->dev,
 806                     I40IW_DEBUG_CM,
 807                     "%s cm_node=%p state =%d\n",
 808                     __func__,
 809                     cm_node,
 810                     cm_node->state);
 811         if (reset)
 812                 i40iw_send_reset(cm_node);
 813         else
 814                 i40iw_rem_ref_cm_node(cm_node);
 815 }
 816
 817 /**
 818  * i40iw_event_connect_error - to create connect error event
 819  * @event: cm information for connect event
 820  */
 821 static void i40iw_event_connect_error(struct i40iw_cm_event *event)
 822 {
 823         struct i40iw_qp *iwqp;
 824         struct iw_cm_id *cm_id;
 825
 826         cm_id = event->cm_node->cm_id;
 827         if (!cm_id)
 828                 return;
 829
 830         iwqp = cm_id->provider_data;
 831
 832         if (!iwqp || !iwqp->iwdev)
 833                 return;
 834
 835         iwqp->cm_id = NULL;
 836         cm_id->provider_data = NULL;
 837         i40iw_send_cm_event(event->cm_node, cm_id,
 838                             IW_CM_EVENT_CONNECT_REPLY,
 839                             -ECONNRESET);
 840         cm_id->rem_ref(cm_id);
 841         i40iw_rem_ref_cm_node(event->cm_node);
 842 }
 843
 844 /**
 845  * i40iw_process_options
 846  * @cm_node: connection's node
 847  * @optionsloc: point to start of options
 848  * @optionsize: size of all options
 849  * @syn_packet: flag if syn packet
 850  */
 851 static int i40iw_process_options(struct i40iw_cm_node *cm_node,
 852                                  u8 *optionsloc,
 853                                  u32 optionsize,
 854                                  u32 syn_packet)
 855 {
 856         u32 tmp;
 857         u32 offset = 0;
 858         union all_known_options *all_options;
 859         char got_mss_option = 0;
 860
 861         while (offset < optionsize) {
 862                 all_options = (union all_known_options *)(optionsloc + offset);
 863                 switch (all_options->as_base.optionnum) {
 864                 case OPTION_NUMBER_END:
 865                         offset = optionsize;
 866                         break;
 867                 case OPTION_NUMBER_NONE:
 868                         offset += 1;
 869                         continue;
 870                 case OPTION_NUMBER_MSS:
 871                         i40iw_debug(cm_node->dev,
 872                                     I40IW_DEBUG_CM,
 873                                     "%s: MSS Length: %d Offset: %d Size: %d\n",
 874                                     __func__,
 875                                     all_options->as_mss.length,
 876                                     offset,
 877                                     optionsize);
 878                         got_mss_option = 1;
 879                         if (all_options->as_mss.length != 4)
 880                                 return -1;
 881                         tmp = ntohs(all_options->as_mss.mss);
 882                         if (tmp > 0 && tmp < cm_node->tcp_cntxt.mss)
 883                                 cm_node->tcp_cntxt.mss = tmp;
 884                         break;
 885                 case OPTION_NUMBER_WINDOW_SCALE:
 886                         cm_node->tcp_cntxt.snd_wscale =
 887                             all_options->as_windowscale.shiftcount;
 888                         break;
 889                 default:
 890                         i40iw_debug(cm_node->dev,
 891                                     I40IW_DEBUG_CM,
 892                                     "TCP Option not understood: %x\n",
 893                                     all_options->as_base.optionnum);
 894                         break;
 895                 }
 896                 offset += all_options->as_base.length;
 897         }
 898         if (!got_mss_option && syn_packet)
 899                 cm_node->tcp_cntxt.mss = I40IW_CM_DEFAULT_MSS;
 900         return 0;
 901 }
 902
 903 /**
 904  * i40iw_handle_tcp_options -
 905  * @cm_node: connection's node
 906  * @tcph: pointer tcp header
 907  * @optionsize: size of options rcvd
 908  * @passive: active or passive flag
 909  */
 910 static int i40iw_handle_tcp_options(struct i40iw_cm_node *cm_node,
 911                                     struct tcphdr *tcph,
 912                                     int optionsize,
 913                                     int passive)
 914 {
 915         u8 *optionsloc = (u8 *)&tcph[1];
 916
 917         if (optionsize) {
 918                 if (i40iw_process_options(cm_node,
 919                                           optionsloc,
 920                                           optionsize,
 921                                           (u32)tcph->syn)) {
 922                         i40iw_debug(cm_node->dev,
 923                                     I40IW_DEBUG_CM,
 924                                     "%s: Node %p, Sending RESET\n",
 925                                     __func__,
 926                                     cm_node);
 927                         if (passive)
 928                                 i40iw_passive_open_err(cm_node, true);
 929                         else
 930                                 i40iw_active_open_err(cm_node, true);
 931                         return -1;
 932                 }
 933         }
 934
 935         cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
 936             cm_node->tcp_cntxt.snd_wscale;
 937
 938         if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
 939                 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
 940         return 0;
 941 }
 942
 943 /**
 944  * i40iw_build_mpa_v1 - build a MPA V1 frame
 945  * @cm_node: connection's node
 946  * @mpa_key: to do read0 or write0
 947  */
 948 static void i40iw_build_mpa_v1(struct i40iw_cm_node *cm_node,
 949                                void *start_addr,
 950                                u8 mpa_key)
 951 {
 952         struct ietf_mpa_v1 *mpa_frame = (struct ietf_mpa_v1 *)start_addr;
 953
 954         switch (mpa_key) {
 955         case MPA_KEY_REQUEST:
 956                 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
 957                 break;
 958         case MPA_KEY_REPLY:
 959                 memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
 960                 break;
 961         default:
 962                 break;
 963         }
 964         mpa_frame->flags = IETF_MPA_FLAGS_CRC;
 965         mpa_frame->rev = cm_node->mpa_frame_rev;
 966         mpa_frame->priv_data_len = htons(cm_node->pdata.size);
 967 }
 968
 969 /**
 970  * i40iw_build_mpa_v2 - build a MPA V2 frame
 971  * @cm_node: connection's node
 972  * @start_addr: buffer start address
 973  * @mpa_key: to do read0 or write0
 974  */
 975 static void i40iw_build_mpa_v2(struct i40iw_cm_node *cm_node,
 976                                void *start_addr,
 977                                u8 mpa_key)
 978 {
 979         struct ietf_mpa_v2 *mpa_frame = (struct ietf_mpa_v2 *)start_addr;
 980         struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg;
 981
 982         /* initialize the upper 5 bytes of the frame */
 983         i40iw_build_mpa_v1(cm_node, start_addr, mpa_key);
 984         mpa_frame->flags |= IETF_MPA_V2_FLAG;
 985         mpa_frame->priv_data_len += htons(IETF_RTR_MSG_SIZE);
 986
 987         /* initialize RTR msg */
 988         if (cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) {
 989                 rtr_msg->ctrl_ird = IETF_NO_IRD_ORD;
 990                 rtr_msg->ctrl_ord = IETF_NO_IRD_ORD;
 991         } else {
 992                 rtr_msg->ctrl_ird = (cm_node->ird_size > IETF_NO_IRD_ORD) ?
 993                         IETF_NO_IRD_ORD : cm_node->ird_size;
 994                 rtr_msg->ctrl_ord = (cm_node->ord_size > IETF_NO_IRD_ORD) ?
 995                         IETF_NO_IRD_ORD : cm_node->ord_size;
 996         }
 997
 998         rtr_msg->ctrl_ird |= IETF_PEER_TO_PEER;
 999         rtr_msg->ctrl_ird |= IETF_FLPDU_ZERO_LEN;
1000
1001         switch (mpa_key) {
1002         case MPA_KEY_REQUEST:
1003                 rtr_msg->ctrl_ord |= IETF_RDMA0_WRITE;
1004                 rtr_msg->ctrl_ord |= IETF_RDMA0_READ;
1005                 break;
1006         case MPA_KEY_REPLY:
1007                 switch (cm_node->send_rdma0_op) {
1008                 case SEND_RDMA_WRITE_ZERO:
1009                         rtr_msg->ctrl_ord |= IETF_RDMA0_WRITE;
1010                         break;
1011                 case SEND_RDMA_READ_ZERO:
1012                         rtr_msg->ctrl_ord |= IETF_RDMA0_READ;
1013                         break;
1014                 }
1015                 break;
1016         default:
1017                 break;
1018         }
1019         rtr_msg->ctrl_ird = htons(rtr_msg->ctrl_ird);
1020         rtr_msg->ctrl_ord = htons(rtr_msg->ctrl_ord);
1021 }
1022
1023 /**
1024  * i40iw_cm_build_mpa_frame - build mpa frame for mpa version 1 or version 2
1025  * @cm_node: connection's node
1026  * @mpa: mpa: data buffer
1027  * @mpa_key: to do read0 or write0
1028  */
1029 static int i40iw_cm_build_mpa_frame(struct i40iw_cm_node *cm_node,
1030                                     struct i40iw_kmem_info *mpa,
1031                                     u8 mpa_key)
1032 {
1033         int hdr_len = 0;
1034
1035         switch (cm_node->mpa_frame_rev) {
1036         case IETF_MPA_V1:
1037                 hdr_len = sizeof(struct ietf_mpa_v1);
1038                 i40iw_build_mpa_v1(cm_node, mpa->addr, mpa_key);
1039                 break;
1040         case IETF_MPA_V2:
1041                 hdr_len = sizeof(struct ietf_mpa_v2);
1042                 i40iw_build_mpa_v2(cm_node, mpa->addr, mpa_key);
1043                 break;
1044         default:
1045                 break;
1046         }
1047
1048         return hdr_len;
1049 }
1050
1051 /**
1052  * i40iw_send_mpa_request - active node send mpa request to passive node
1053  * @cm_node: connection's node
1054  */
1055 static int i40iw_send_mpa_request(struct i40iw_cm_node *cm_node)
1056 {
1057         struct i40iw_puda_buf *sqbuf;
1058
1059         if (!cm_node) {
1060                 i40iw_pr_err("cm_node == NULL\n");
1061                 return -1;
1062         }
1063
1064         cm_node->mpa_hdr.addr = &cm_node->mpa_frame;
1065         cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node,
1066                                                          &cm_node->mpa_hdr,
1067                                                          MPA_KEY_REQUEST);
1068         if (!cm_node->mpa_hdr.size) {
1069                 i40iw_pr_err("mpa size = %d\n", cm_node->mpa_hdr.size);
1070                 return -1;
1071         }
1072
1073         sqbuf = i40iw_form_cm_frame(cm_node,
1074                                     NULL,
1075                                     &cm_node->mpa_hdr,
1076                                     &cm_node->pdata,
1077                                     SET_ACK);
1078         if (!sqbuf) {
1079                 i40iw_pr_err("sq_buf == NULL\n");
1080                 return -1;
1081         }
1082
1083         return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
1084 }
1085
1086 /**
1087  * i40iw_send_mpa_reject -
1088  * @cm_node: connection's node
1089  * @pdata: reject data for connection
1090  * @plen: length of reject data
1091  */
1092 static int i40iw_send_mpa_reject(struct i40iw_cm_node *cm_node,
1093                                  const void *pdata,
1094                                  u8 plen)
1095 {
1096         struct i40iw_puda_buf *sqbuf;
1097         struct i40iw_kmem_info priv_info;
1098
1099         cm_node->mpa_hdr.addr = &cm_node->mpa_frame;
1100         cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node,
1101                                                          &cm_node->mpa_hdr,
1102                                                          MPA_KEY_REPLY);
1103
1104         cm_node->mpa_frame.flags |= IETF_MPA_FLAGS_REJECT;
1105         priv_info.addr = (void *)pdata;
1106         priv_info.size = plen;
1107
1108         sqbuf = i40iw_form_cm_frame(cm_node,
1109                                     NULL,
1110                                     &cm_node->mpa_hdr,
1111                                     &priv_info,
1112                                     SET_ACK | SET_FIN);
1113         if (!sqbuf) {
1114                 i40iw_pr_err("no sqbuf\n");
1115                 return -ENOMEM;
1116         }
1117         cm_node->state = I40IW_CM_STATE_FIN_WAIT1;
1118         return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
1119 }
1120
1121 /**
1122  * recv_mpa - process an IETF MPA frame
1123  * @cm_node: connection's node
1124  * @buffer: Data pointer
1125  * @type: to return accept or reject
1126  * @len: Len of mpa buffer
1127  */
1128 static int i40iw_parse_mpa(struct i40iw_cm_node *cm_node, u8 *buffer, u32 *type, u32 len)
1129 {
1130         struct ietf_mpa_v1 *mpa_frame;
1131         struct ietf_mpa_v2 *mpa_v2_frame;
1132         struct ietf_rtr_msg *rtr_msg;
1133         int mpa_hdr_len;
1134         int priv_data_len;
1135
1136         *type = I40IW_MPA_REQUEST_ACCEPT;
1137
1138         if (len < sizeof(struct ietf_mpa_v1)) {
1139                 i40iw_pr_err("ietf buffer small (%x)\n", len);
1140                 return -1;
1141         }
1142
1143         mpa_frame = (struct ietf_mpa_v1 *)buffer;
1144         mpa_hdr_len = sizeof(struct ietf_mpa_v1);
1145         priv_data_len = ntohs(mpa_frame->priv_data_len);
1146
1147         if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) {
1148                 i40iw_pr_err("large pri_data %d\n", priv_data_len);
1149                 return -1;
1150         }
1151         if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) {
1152                 i40iw_pr_err("unsupported mpa rev = %d\n", mpa_frame->rev);
1153                 return -1;
1154         }
1155         if (mpa_frame->rev > cm_node->mpa_frame_rev) {
1156                 i40iw_pr_err("rev %d\n", mpa_frame->rev);
1157                 return -1;
1158         }
1159         cm_node->mpa_frame_rev = mpa_frame->rev;
1160
1161         if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) {
1162                 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) {
1163                         i40iw_pr_err("Unexpected MPA Key received\n");
1164                         return -1;
1165                 }
1166         } else {
1167                 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) {
1168                         i40iw_pr_err("Unexpected MPA Key received\n");
1169                         return -1;
1170                 }
1171         }
1172
1173         if (priv_data_len + mpa_hdr_len > len) {
1174                 i40iw_pr_err("ietf buffer len(%x + %x != %x)\n",
1175                              priv_data_len, mpa_hdr_len, len);
1176                 return -1;
1177         }
1178         if (len > MAX_CM_BUFFER) {
1179                 i40iw_pr_err("ietf buffer large len = %d\n", len);
1180                 return -1;
1181         }
1182
1183         switch (mpa_frame->rev) {
1184         case IETF_MPA_V2:{
1185                         u16 ird_size;
1186                         u16 ord_size;
1187                         u16 ctrl_ord;
1188                         u16 ctrl_ird;
1189
1190                         mpa_v2_frame = (struct ietf_mpa_v2 *)buffer;
1191                         mpa_hdr_len += IETF_RTR_MSG_SIZE;
1192                         rtr_msg = &mpa_v2_frame->rtr_msg;
1193
1194                         /* parse rtr message */
1195                         ctrl_ord = ntohs(rtr_msg->ctrl_ord);
1196                         ctrl_ird = ntohs(rtr_msg->ctrl_ird);
1197                         ird_size = ctrl_ird & IETF_NO_IRD_ORD;
1198                         ord_size = ctrl_ord & IETF_NO_IRD_ORD;
1199
1200                         if (!(ctrl_ird & IETF_PEER_TO_PEER))
1201                                 return -1;
1202
1203                         if (ird_size == IETF_NO_IRD_ORD || ord_size == IETF_NO_IRD_ORD) {
1204                                 cm_node->mpav2_ird_ord = IETF_NO_IRD_ORD;
1205                                 goto negotiate_done;
1206                         }
1207
1208                         if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) {
1209                                 /* responder */
1210                                 if (!ord_size && (ctrl_ord & IETF_RDMA0_READ))
1211                                         cm_node->ird_size = 1;
1212                                 if (cm_node->ord_size > ird_size)
1213                                         cm_node->ord_size = ird_size;
1214                         } else {
1215                                 /* initiator */
1216                                 if (!ird_size && (ctrl_ord & IETF_RDMA0_READ))
1217                                         return -1;
1218                                 if (cm_node->ord_size > ird_size)
1219                                         cm_node->ord_size = ird_size;
1220
1221                                 if (cm_node->ird_size < ord_size)
1222                                         /* no resources available */
1223                                         return -1;
1224                         }
1225
1226 negotiate_done:
1227                         if (ctrl_ord & IETF_RDMA0_READ)
1228                                 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
1229                         else if (ctrl_ord & IETF_RDMA0_WRITE)
1230                                 cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO;
1231                         else    /* Not supported RDMA0 operation */
1232                                 return -1;
1233                         i40iw_debug(cm_node->dev, I40IW_DEBUG_CM,
1234                                     "MPAV2: Negotiated ORD: %d, IRD: %d\n",
1235                                     cm_node->ord_size, cm_node->ird_size);
1236                         break;
1237                 }
1238                 break;
1239         case IETF_MPA_V1:
1240         default:
1241                 break;
1242         }
1243
1244         memcpy(cm_node->pdata_buf, buffer + mpa_hdr_len, priv_data_len);
1245         cm_node->pdata.size = priv_data_len;
1246
1247         if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT)
1248                 *type = I40IW_MPA_REQUEST_REJECT;
1249
1250         if (mpa_frame->flags & IETF_MPA_FLAGS_MARKERS)
1251                 cm_node->snd_mark_en = true;
1252
1253         return 0;
1254 }
1255
1256 /**
1257  * i40iw_schedule_cm_timer
1258  * @@cm_node: connection's node
1259  * @sqbuf: buffer to send
1260  * @type: if it es send ot close
1261  * @send_retrans: if rexmits to be done
1262  * @close_when_complete: is cm_node to be removed
1263  *
1264  * note - cm_node needs to be protected before calling this. Encase in:
1265  *              i40iw_rem_ref_cm_node(cm_core, cm_node);
1266  *              i40iw_schedule_cm_timer(...)
1267  *              atomic_inc(&cm_node->ref_count);
1268  */
1269 int i40iw_schedule_cm_timer(struct i40iw_cm_node *cm_node,
1270                             struct i40iw_puda_buf *sqbuf,
1271                             enum i40iw_timer_type type,
1272                             int send_retrans,
1273                             int close_when_complete)
1274 {
1275         struct i40iw_sc_dev *dev = cm_node->dev;
1276         struct i40iw_cm_core *cm_core = cm_node->cm_core;
1277         struct i40iw_timer_entry *new_send;
1278         int ret = 0;
1279         u32 was_timer_set;
1280         unsigned long flags;
1281
1282         new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
1283         if (!new_send) {
1284                 i40iw_free_sqbuf(cm_node->dev, (void *)sqbuf);
1285                 return -ENOMEM;
1286         }
1287         new_send->retrycount = I40IW_DEFAULT_RETRYS;
1288         new_send->retranscount = I40IW_DEFAULT_RETRANS;
1289         new_send->sqbuf = sqbuf;
1290         new_send->timetosend = jiffies;
1291         new_send->type = type;
1292         new_send->send_retrans = send_retrans;
1293         new_send->close_when_complete = close_when_complete;
1294
1295         if (type == I40IW_TIMER_TYPE_CLOSE) {
1296                 new_send->timetosend += (HZ / 10);
1297                 if (cm_node->close_entry) {
1298                         kfree(new_send);
1299                         i40iw_free_sqbuf(cm_node->dev, (void *)sqbuf);
1300                         i40iw_pr_err("already close entry\n");
1301                         return -EINVAL;
1302                 }
1303                 cm_node->close_entry = new_send;
1304         }
1305
1306         if (type == I40IW_TIMER_TYPE_SEND) {
1307                 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1308                 cm_node->send_entry = new_send;
1309                 atomic_inc(&cm_node->ref_count);
1310                 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1311                 new_send->timetosend = jiffies + I40IW_RETRY_TIMEOUT;
1312
1313                 atomic_inc(&sqbuf->refcount);
1314                 i40iw_puda_send_buf(dev->ilq, sqbuf);
1315                 if (!send_retrans) {
1316                         i40iw_cleanup_retrans_entry(cm_node);
1317                         if (close_when_complete)
1318                                 i40iw_rem_ref_cm_node(cm_node);
1319                         return ret;
1320                 }
1321         }
1322
1323         spin_lock_irqsave(&cm_core->ht_lock, flags);
1324         was_timer_set = timer_pending(&cm_core->tcp_timer);
1325
1326         if (!was_timer_set) {
1327                 cm_core->tcp_timer.expires = new_send->timetosend;
1328                 add_timer(&cm_core->tcp_timer);
1329         }
1330         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1331
1332         return ret;
1333 }
1334
1335 /**
1336  * i40iw_retrans_expired - Could not rexmit the packet
1337  * @cm_node: connection's node
1338  */
1339 static void i40iw_retrans_expired(struct i40iw_cm_node *cm_node)
1340 {
1341         struct iw_cm_id *cm_id = cm_node->cm_id;
1342         enum i40iw_cm_node_state state = cm_node->state;
1343
1344         cm_node->state = I40IW_CM_STATE_CLOSED;
1345         switch (state) {
1346         case I40IW_CM_STATE_SYN_RCVD:
1347         case I40IW_CM_STATE_CLOSING:
1348                 i40iw_rem_ref_cm_node(cm_node);
1349                 break;
1350         case I40IW_CM_STATE_FIN_WAIT1:
1351         case I40IW_CM_STATE_LAST_ACK:
1352                 if (cm_node->cm_id)
1353                         cm_id->rem_ref(cm_id);
1354                 i40iw_send_reset(cm_node);
1355                 break;
1356         default:
1357                 atomic_inc(&cm_node->ref_count);
1358                 i40iw_send_reset(cm_node);
1359                 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
1360                 break;
1361         }
1362 }
1363
1364 /**
1365  * i40iw_handle_close_entry - for handling retry/timeouts
1366  * @cm_node: connection's node
1367  * @rem_node: flag for remove cm_node
1368  */
1369 static void i40iw_handle_close_entry(struct i40iw_cm_node *cm_node, u32 rem_node)
1370 {
1371         struct i40iw_timer_entry *close_entry = cm_node->close_entry;
1372         struct iw_cm_id *cm_id = cm_node->cm_id;
1373         struct i40iw_qp *iwqp;
1374         unsigned long flags;
1375
1376         if (!close_entry)
1377                 return;
1378         iwqp = (struct i40iw_qp *)close_entry->sqbuf;
1379         if (iwqp) {
1380                 spin_lock_irqsave(&iwqp->lock, flags);
1381                 if (iwqp->cm_id) {
1382                         iwqp->hw_tcp_state = I40IW_TCP_STATE_CLOSED;
1383                         iwqp->hw_iwarp_state = I40IW_QP_STATE_ERROR;
1384                         iwqp->last_aeq = I40IW_AE_RESET_SENT;
1385                         iwqp->ibqp_state = IB_QPS_ERR;
1386                         spin_unlock_irqrestore(&iwqp->lock, flags);
1387                         i40iw_cm_disconn(iwqp);
1388                 } else {
1389                         spin_unlock_irqrestore(&iwqp->lock, flags);
1390                 }
1391         } else if (rem_node) {
1392                 /* TIME_WAIT state */
1393                 i40iw_rem_ref_cm_node(cm_node);
1394         }
1395         if (cm_id)
1396                 cm_id->rem_ref(cm_id);
1397         kfree(close_entry);
1398         cm_node->close_entry = NULL;
1399 }
1400
1401 /**
1402  * i40iw_cm_timer_tick - system's timer expired callback
1403  * @pass: Pointing to cm_core
1404  */
1405 static void i40iw_cm_timer_tick(unsigned long pass)
1406 {
1407         unsigned long nexttimeout = jiffies + I40IW_LONG_TIME;
1408         struct i40iw_cm_node *cm_node;
1409         struct i40iw_timer_entry *send_entry, *close_entry;
1410         struct list_head *list_core_temp;
1411         struct list_head *list_node;
1412         struct i40iw_cm_core *cm_core = (struct i40iw_cm_core *)pass;
1413         u32 settimer = 0;
1414         unsigned long timetosend;
1415         struct i40iw_sc_dev *dev;
1416         unsigned long flags;
1417
1418         struct list_head timer_list;
1419
1420         INIT_LIST_HEAD(&timer_list);
1421         spin_lock_irqsave(&cm_core->ht_lock, flags);
1422
1423         list_for_each_safe(list_node, list_core_temp, &cm_core->connected_nodes) {
1424                 cm_node = container_of(list_node, struct i40iw_cm_node, list);
1425                 if (cm_node->close_entry || cm_node->send_entry) {
1426                         atomic_inc(&cm_node->ref_count);
1427                         list_add(&cm_node->timer_entry, &timer_list);
1428                 }
1429         }
1430         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1431
1432         list_for_each_safe(list_node, list_core_temp, &timer_list) {
1433                 cm_node = container_of(list_node,
1434                                        struct i40iw_cm_node,
1435                                        timer_entry);
1436                 close_entry = cm_node->close_entry;
1437
1438                 if (close_entry) {
1439                         if (time_after(close_entry->timetosend, jiffies)) {
1440                                 if (nexttimeout > close_entry->timetosend ||
1441                                     !settimer) {
1442                                         nexttimeout = close_entry->timetosend;
1443                                         settimer = 1;
1444                                 }
1445                         } else {
1446                                 i40iw_handle_close_entry(cm_node, 1);
1447                         }
1448                 }
1449
1450                 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1451
1452                 send_entry = cm_node->send_entry;
1453                 if (!send_entry)
1454                         goto done;
1455                 if (time_after(send_entry->timetosend, jiffies)) {
1456                         if (cm_node->state != I40IW_CM_STATE_OFFLOADED) {
1457                                 if ((nexttimeout > send_entry->timetosend) ||
1458                                     !settimer) {
1459                                         nexttimeout = send_entry->timetosend;
1460                                         settimer = 1;
1461                                 }
1462                         } else {
1463                                 i40iw_free_retrans_entry(cm_node);
1464                         }
1465                         goto done;
1466                 }
1467
1468                 if ((cm_node->state == I40IW_CM_STATE_OFFLOADED) ||
1469                     (cm_node->state == I40IW_CM_STATE_CLOSED)) {
1470                         i40iw_free_retrans_entry(cm_node);
1471                         goto done;
1472                 }
1473
1474                 if (!send_entry->retranscount || !send_entry->retrycount) {
1475                         i40iw_free_retrans_entry(cm_node);
1476
1477                         spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1478                         i40iw_retrans_expired(cm_node);
1479                         cm_node->state = I40IW_CM_STATE_CLOSED;
1480                         spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1481                         goto done;
1482                 }
1483                 cm_node->cm_core->stats_pkt_retrans++;
1484                 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1485
1486                 dev = cm_node->dev;
1487                 atomic_inc(&send_entry->sqbuf->refcount);
1488                 i40iw_puda_send_buf(dev->ilq, send_entry->sqbuf);
1489                 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1490                 if (send_entry->send_retrans) {
1491                         send_entry->retranscount--;
1492                         timetosend = (I40IW_RETRY_TIMEOUT <<
1493                                       (I40IW_DEFAULT_RETRANS -
1494                                        send_entry->retranscount));
1495
1496                         send_entry->timetosend = jiffies +
1497                             min(timetosend, I40IW_MAX_TIMEOUT);
1498                         if (nexttimeout > send_entry->timetosend || !settimer) {
1499                                 nexttimeout = send_entry->timetosend;
1500                                 settimer = 1;
1501                         }
1502                 } else {
1503                         int close_when_complete;
1504
1505                         close_when_complete = send_entry->close_when_complete;
1506                         i40iw_debug(cm_node->dev,
1507                                     I40IW_DEBUG_CM,
1508                                     "cm_node=%p state=%d\n",
1509                                     cm_node,
1510                                     cm_node->state);
1511                         i40iw_free_retrans_entry(cm_node);
1512                         if (close_when_complete)
1513                                 i40iw_rem_ref_cm_node(cm_node);
1514                 }
1515 done:
1516                 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1517                 i40iw_rem_ref_cm_node(cm_node);
1518         }
1519
1520         if (settimer) {
1521                 spin_lock_irqsave(&cm_core->ht_lock, flags);
1522                 if (!timer_pending(&cm_core->tcp_timer)) {
1523                         cm_core->tcp_timer.expires = nexttimeout;
1524                         add_timer(&cm_core->tcp_timer);
1525                 }
1526                 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1527         }
1528 }
1529
1530 /**
1531  * i40iw_send_syn - send SYN packet
1532  * @cm_node: connection's node
1533  * @sendack: flag to set ACK bit or not
1534  */
1535 int i40iw_send_syn(struct i40iw_cm_node *cm_node, u32 sendack)
1536 {
1537         struct i40iw_puda_buf *sqbuf;
1538         int flags = SET_SYN;
1539         char optionsbuffer[sizeof(struct option_mss) +
1540                            sizeof(struct option_windowscale) +
1541                            sizeof(struct option_base) + TCP_OPTIONS_PADDING];
1542         struct i40iw_kmem_info opts;
1543
1544         int optionssize = 0;
1545         /* Sending MSS option */
1546         union all_known_options *options;
1547
1548         opts.addr = optionsbuffer;
1549         if (!cm_node) {
1550                 i40iw_pr_err("no cm_node\n");
1551                 return -EINVAL;
1552         }
1553
1554         options = (union all_known_options *)&optionsbuffer[optionssize];
1555         options->as_mss.optionnum = OPTION_NUMBER_MSS;
1556         options->as_mss.length = sizeof(struct option_mss);
1557         options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
1558         optionssize += sizeof(struct option_mss);
1559
1560         options = (union all_known_options *)&optionsbuffer[optionssize];
1561         options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
1562         options->as_windowscale.length = sizeof(struct option_windowscale);
1563         options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
1564         optionssize += sizeof(struct option_windowscale);
1565         options = (union all_known_options *)&optionsbuffer[optionssize];
1566         options->as_end = OPTION_NUMBER_END;
1567         optionssize += 1;
1568
1569         if (sendack)
1570                 flags |= SET_ACK;
1571
1572         opts.size = optionssize;
1573
1574         sqbuf = i40iw_form_cm_frame(cm_node, &opts, NULL, NULL, flags);
1575         if (!sqbuf) {
1576                 i40iw_pr_err("no sqbuf\n");
1577                 return -1;
1578         }
1579         return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
1580 }
1581
1582 /**
1583  * i40iw_send_ack - Send ACK packet
1584  * @cm_node: connection's node
1585  */
1586 static void i40iw_send_ack(struct i40iw_cm_node *cm_node)
1587 {
1588         struct i40iw_puda_buf *sqbuf;
1589
1590         sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK);
1591         if (sqbuf)
1592                 i40iw_puda_send_buf(cm_node->dev->ilq, sqbuf);
1593         else
1594                 i40iw_pr_err("no sqbuf\n");
1595 }
1596
1597 /**
1598  * i40iw_send_fin - Send FIN pkt
1599  * @cm_node: connection's node
1600  */
1601 static int i40iw_send_fin(struct i40iw_cm_node *cm_node)
1602 {
1603         struct i40iw_puda_buf *sqbuf;
1604
1605         sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK | SET_FIN);
1606         if (!sqbuf) {
1607                 i40iw_pr_err("no sqbuf\n");
1608                 return -1;
1609         }
1610         return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
1611 }
1612
1613 /**
1614  * i40iw_find_node - find a cm node that matches the reference cm node
1615  * @cm_core: cm's core
1616  * @rem_port: remote tcp port num
1617  * @rem_addr: remote ip addr
1618  * @loc_port: local tcp port num
1619  * @loc_addr: loc ip addr
1620  * @add_refcnt: flag to increment refcount of cm_node
1621  */
1622 struct i40iw_cm_node *i40iw_find_node(struct i40iw_cm_core *cm_core,
1623                                       u16 rem_port,
1624                                       u32 *rem_addr,
1625                                       u16 loc_port,
1626                                       u32 *loc_addr,
1627                                       bool add_refcnt)
1628 {
1629         struct list_head *hte;
1630         struct i40iw_cm_node *cm_node;
1631         unsigned long flags;
1632
1633         hte = &cm_core->connected_nodes;
1634
1635         /* walk list and find cm_node associated with this session ID */
1636         spin_lock_irqsave(&cm_core->ht_lock, flags);
1637         list_for_each_entry(cm_node, hte, list) {
1638                 if (!memcmp(cm_node->map_loc_addr, loc_addr, sizeof(cm_node->map_loc_addr)) &&
1639                     (cm_node->map_loc_port == loc_port) &&
1640                     !memcmp(cm_node->map_rem_addr, rem_addr, sizeof(cm_node->map_rem_addr)) &&
1641                     (cm_node->map_rem_port == rem_port)) {
1642                         if (add_refcnt)
1643                                 atomic_inc(&cm_node->ref_count);
1644                         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1645                         return cm_node;
1646                 }
1647         }
1648         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1649
1650         /* no owner node */
1651         return NULL;
1652 }
1653
1654 /**
1655  * i40iw_find_listener - find a cm node listening on this addr-port pair
1656  * @cm_core: cm's core
1657  * @dst_port: listener tcp port num
1658  * @dst_addr: listener ip addr
1659  * @listener_state: state to match with listen node's
1660  */
1661 static struct i40iw_cm_listener *i40iw_find_listener(
1662                                                      struct i40iw_cm_core *cm_core,
1663                                                      u32 *dst_addr,
1664                                                      u16 dst_port,
1665                                                      u16 vlan_id,
1666                                                      enum i40iw_cm_listener_state
1667                                                      listener_state,
1668                                                      bool mapped)
1669 {
1670         struct i40iw_cm_listener *listen_node;
1671         static const u32 ip_zero[4] = { 0, 0, 0, 0 };
1672         u32 listen_addr[4];
1673         u16 listen_port;
1674         unsigned long flags;
1675
1676         /* walk list and find cm_node associated with this session ID */
1677         spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1678         list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
1679                 if (mapped) {
1680                         memcpy(listen_addr, listen_node->map_loc_addr, sizeof(listen_addr));
1681                         listen_port = listen_node->map_loc_port;
1682                 } else {
1683                         memcpy(listen_addr, listen_node->loc_addr, sizeof(listen_addr));
1684                         listen_port = listen_node->loc_port;
1685                 }
1686                 /* compare node pair, return node handle if a match */
1687                 if ((!memcmp(listen_addr, dst_addr, sizeof(listen_addr)) ||
1688                      !memcmp(listen_addr, ip_zero, sizeof(listen_addr))) &&
1689                      (listen_port == dst_port) &&
1690                      (listener_state & listen_node->listener_state)) {
1691                         atomic_inc(&listen_node->ref_count);
1692                         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1693                         return listen_node;
1694                 }
1695         }
1696         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1697         return NULL;
1698 }
1699
1700 /**
1701  * i40iw_add_hte_node - add a cm node to the hash table
1702  * @cm_core: cm's core
1703  * @cm_node: connection's node
1704  */
1705 static void i40iw_add_hte_node(struct i40iw_cm_core *cm_core,
1706                                struct i40iw_cm_node *cm_node)
1707 {
1708         struct list_head *hte;
1709         unsigned long flags;
1710
1711         if (!cm_node || !cm_core) {
1712                 i40iw_pr_err("cm_node or cm_core == NULL\n");
1713                 return;
1714         }
1715         spin_lock_irqsave(&cm_core->ht_lock, flags);
1716
1717         /* get a handle on the hash table element (list head for this slot) */
1718         hte = &cm_core->connected_nodes;
1719         list_add_tail(&cm_node->list, hte);
1720         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1721 }
1722
1723 /**
1724  * listen_port_in_use - determine if port is in use
1725  * @port: Listen port number
1726  */
1727 static bool i40iw_listen_port_in_use(struct i40iw_cm_core *cm_core, u16 port)
1728 {
1729         struct i40iw_cm_listener *listen_node;
1730         unsigned long flags;
1731         bool ret = false;
1732
1733         spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1734         list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
1735                 if (listen_node->map_loc_port == port) {
1736                         ret = true;
1737                         break;
1738                 }
1739         }
1740         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1741         return ret;
1742 }
1743
1744 /**
1745  * i40iw_del_multiple_qhash - Remove qhash and child listens
1746  * @iwdev: iWarp device
1747  * @cm_info: CM info for parent listen node
1748  * @cm_parent_listen_node: The parent listen node
1749  */
1750 static enum i40iw_status_code i40iw_del_multiple_qhash(
1751                                                        struct i40iw_device *iwdev,
1752                                                        struct i40iw_cm_info *cm_info,
1753                                                        struct i40iw_cm_listener *cm_parent_listen_node)
1754 {
1755         struct i40iw_cm_listener *child_listen_node;
1756         enum i40iw_status_code ret = I40IW_ERR_CONFIG;
1757         struct list_head *pos, *tpos;
1758         unsigned long flags;
1759
1760         spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1761         list_for_each_safe(pos, tpos, &cm_parent_listen_node->child_listen_list) {
1762                 child_listen_node = list_entry(pos, struct i40iw_cm_listener, child_listen_list);
1763                 if (child_listen_node->ipv4)
1764                         i40iw_debug(&iwdev->sc_dev,
1765                                     I40IW_DEBUG_CM,
1766                                     "removing child listen for IP=%pI4, port=%d, vlan=%d\n",
1767                                     child_listen_node->loc_addr,
1768                                     child_listen_node->loc_port,
1769                                     child_listen_node->vlan_id);
1770                 else
1771                         i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM,
1772                                     "removing child listen for IP=%pI6, port=%d, vlan=%d\n",
1773                                     child_listen_node->loc_addr,
1774                                     child_listen_node->loc_port,
1775                                     child_listen_node->vlan_id);
1776                 list_del(pos);
1777                 memcpy(cm_info->map_loc_addr, child_listen_node->map_loc_addr,
1778                        sizeof(cm_info->map_loc_addr));
1779                 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1780                        sizeof(cm_info->loc_addr));
1781                 cm_info->vlan_id = child_listen_node->vlan_id;
1782                 ret = i40iw_manage_qhash(iwdev, cm_info,
1783                                          I40IW_QHASH_TYPE_TCP_SYN,
1784                                          I40IW_QHASH_MANAGE_TYPE_DELETE, NULL, false);
1785                 kfree(child_listen_node);
1786                 cm_parent_listen_node->cm_core->stats_listen_nodes_destroyed++;
1787                 i40iw_debug(&iwdev->sc_dev,
1788                             I40IW_DEBUG_CM,
1789                             "freed pointer = %p\n",
1790                             child_listen_node);
1791         }
1792         spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1793
1794         return ret;
1795 }
1796
1797 /**
1798  * i40iw_netdev_vlan_ipv6 - Gets the netdev and mac
1799  * @addr: local IPv6 address
1800  * @vlan_id: vlan id for the given IPv6 address
1801  * @mac: mac address for the given IPv6 address
1802  *
1803  * Returns the net_device of the IPv6 address and also sets the
1804  * vlan id and mac for that address.
1805  */
1806 static struct net_device *i40iw_netdev_vlan_ipv6(u32 *addr, u16 *vlan_id, u8 *mac)
1807 {
1808         struct net_device *ip_dev = NULL;
1809 #if IS_ENABLED(CONFIG_IPV6)
1810         struct in6_addr laddr6;
1811
1812         i40iw_copy_ip_htonl(laddr6.in6_u.u6_addr32, addr);
1813         if (vlan_id)
1814                 *vlan_id = I40IW_NO_VLAN;
1815         if (mac)
1816                 eth_zero_addr(mac);
1817         rcu_read_lock();
1818         for_each_netdev_rcu(&init_net, ip_dev) {
1819                 if (ipv6_chk_addr(&init_net, &laddr6, ip_dev, 1)) {
1820                         if (vlan_id)
1821                                 *vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1822                         if (ip_dev->dev_addr && mac)
1823                                 ether_addr_copy(mac, ip_dev->dev_addr);
1824                         break;
1825                 }
1826         }
1827         rcu_read_unlock();
1828 #endif
1829         return ip_dev;
1830 }
1831
1832 /**
1833  * i40iw_get_vlan_ipv4 - Returns the vlan_id for IPv4 address
1834  * @addr: local IPv4 address
1835  */
1836 static u16 i40iw_get_vlan_ipv4(u32 *addr)
1837 {
1838         struct net_device *netdev;
1839         u16 vlan_id = I40IW_NO_VLAN;
1840
1841         netdev = ip_dev_find(&init_net, htonl(addr[0]));
1842         if (netdev) {
1843                 vlan_id = rdma_vlan_dev_vlan_id(netdev);
1844                 dev_put(netdev);
1845         }
1846         return vlan_id;
1847 }
1848
1849 /**
1850  * i40iw_add_mqh_6 - Adds multiple qhashes for IPv6
1851  * @iwdev: iWarp device
1852  * @cm_info: CM info for parent listen node
1853  * @cm_parent_listen_node: The parent listen node
1854  *
1855  * Adds a qhash and a child listen node for every IPv6 address
1856  * on the adapter and adds the associated qhash filter
1857  */
1858 static enum i40iw_status_code i40iw_add_mqh_6(struct i40iw_device *iwdev,
1859                                               struct i40iw_cm_info *cm_info,
1860                                               struct i40iw_cm_listener *cm_parent_listen_node)
1861 {
1862         struct net_device *ip_dev;
1863         struct inet6_dev *idev;
1864         struct inet6_ifaddr *ifp;
1865         enum i40iw_status_code ret = 0;
1866         struct i40iw_cm_listener *child_listen_node;
1867         unsigned long flags;
1868
1869         rtnl_lock();
1870         for_each_netdev_rcu(&init_net, ip_dev) {
1871                 if ((((rdma_vlan_dev_vlan_id(ip_dev) < I40IW_NO_VLAN) &&
1872                       (rdma_vlan_dev_real_dev(ip_dev) == iwdev->netdev)) ||
1873                      (ip_dev == iwdev->netdev)) && (ip_dev->flags & IFF_UP)) {
1874                         idev = __in6_dev_get(ip_dev);
1875                         if (!idev) {
1876                                 i40iw_pr_err("idev == NULL\n");
1877                                 break;
1878                         }
1879                         list_for_each_entry(ifp, &idev->addr_list, if_list) {
1880                                 i40iw_debug(&iwdev->sc_dev,
1881                                             I40IW_DEBUG_CM,
1882                                             "IP=%pI6, vlan_id=%d, MAC=%pM\n",
1883                                             &ifp->addr,
1884                                             rdma_vlan_dev_vlan_id(ip_dev),
1885                                             ip_dev->dev_addr);
1886                                 child_listen_node =
1887                                         kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
1888                                 i40iw_debug(&iwdev->sc_dev,
1889                                             I40IW_DEBUG_CM,
1890                                             "Allocating child listener %p\n",
1891                                             child_listen_node);
1892                                 if (!child_listen_node) {
1893                                         i40iw_pr_err("listener memory allocation\n");
1894                                         ret = I40IW_ERR_NO_MEMORY;
1895                                         goto exit;
1896                                 }
1897                                 cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1898                                 cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1899
1900                                 memcpy(child_listen_node, cm_parent_listen_node,
1901                                        sizeof(*child_listen_node));
1902
1903                                 i40iw_copy_ip_ntohl(child_listen_node->loc_addr,
1904                                                     ifp->addr.in6_u.u6_addr32);
1905                                 i40iw_copy_ip_ntohl(child_listen_node->map_loc_addr,
1906                                                     ifp->addr.in6_u.u6_addr32);
1907
1908                                 memcpy(cm_info->map_loc_addr, child_listen_node->map_loc_addr,
1909                                        sizeof(cm_info->map_loc_addr));
1910                                 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1911                                        sizeof(cm_info->loc_addr));
1912
1913                                 ret = i40iw_manage_qhash(iwdev, cm_info,
1914                                                          I40IW_QHASH_TYPE_TCP_SYN,
1915                                                          I40IW_QHASH_MANAGE_TYPE_ADD,
1916                                                          NULL, true);
1917                                 if (!ret) {
1918                                         spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1919                                         list_add(&child_listen_node->child_listen_list,
1920                                                  &cm_parent_listen_node->child_listen_list);
1921                                         spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1922                                         cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
1923                                 } else {
1924                                         kfree(child_listen_node);
1925                                 }
1926                         }
1927                 }
1928         }
1929 exit:
1930         rtnl_unlock();
1931         return ret;
1932 }
1933
1934 /**
1935  * i40iw_add_mqh_4 - Adds multiple qhashes for IPv4
1936  * @iwdev: iWarp device
1937  * @cm_info: CM info for parent listen node
1938  * @cm_parent_listen_node: The parent listen node
1939  *
1940  * Adds a qhash and a child listen node for every IPv4 address
1941  * on the adapter and adds the associated qhash filter
1942  */
1943 static enum i40iw_status_code i40iw_add_mqh_4(
1944                                 struct i40iw_device *iwdev,
1945                                 struct i40iw_cm_info *cm_info,
1946                                 struct i40iw_cm_listener *cm_parent_listen_node)
1947 {
1948         struct net_device *dev;
1949         struct in_device *idev;
1950         struct i40iw_cm_listener *child_listen_node;
1951         enum i40iw_status_code ret = 0;
1952         unsigned long flags;
1953
1954         rtnl_lock();
1955         for_each_netdev(&init_net, dev) {
1956                 if ((((rdma_vlan_dev_vlan_id(dev) < I40IW_NO_VLAN) &&
1957                       (rdma_vlan_dev_real_dev(dev) == iwdev->netdev)) ||
1958                     (dev == iwdev->netdev)) && (dev->flags & IFF_UP)) {
1959                         idev = in_dev_get(dev);
1960                         for_ifa(idev) {
1961                                 i40iw_debug(&iwdev->sc_dev,
1962                                             I40IW_DEBUG_CM,
1963                                             "Allocating child CM Listener forIP=%pI4, vlan_id=%d, MAC=%pM\n",
1964                                             &ifa->ifa_address,
1965                                             rdma_vlan_dev_vlan_id(dev),
1966                                             dev->dev_addr);
1967                                 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
1968                                 cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
1969                                 i40iw_debug(&iwdev->sc_dev,
1970                                             I40IW_DEBUG_CM,
1971                                             "Allocating child listener %p\n",
1972                                             child_listen_node);
1973                                 if (!child_listen_node) {
1974                                         i40iw_pr_err("listener memory allocation\n");
1975                                         in_dev_put(idev);
1976                                         ret = I40IW_ERR_NO_MEMORY;
1977                                         goto exit;
1978                                 }
1979                                 cm_info->vlan_id = rdma_vlan_dev_vlan_id(dev);
1980                                 cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1981                                 memcpy(child_listen_node,
1982                                        cm_parent_listen_node,
1983                                        sizeof(*child_listen_node));
1984
1985                                 child_listen_node->loc_addr[0] = ntohl(ifa->ifa_address);
1986                                 child_listen_node->map_loc_addr[0] = ntohl(ifa->ifa_address);
1987
1988                                 memcpy(cm_info->map_loc_addr, child_listen_node->map_loc_addr,
1989                                        sizeof(cm_info->map_loc_addr));
1990                                 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1991                                        sizeof(cm_info->loc_addr));
1992
1993                                 ret = i40iw_manage_qhash(iwdev,
1994                                                          cm_info,
1995                                                          I40IW_QHASH_TYPE_TCP_SYN,
1996                                                          I40IW_QHASH_MANAGE_TYPE_ADD,
1997                                                          NULL,
1998                                                          true);
1999                                 if (!ret) {
2000                                         spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
2001                                         list_add(&child_listen_node->child_listen_list,
2002                                                  &cm_parent_listen_node->child_listen_list);
2003                                         spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
2004                                 } else {
2005                                         kfree(child_listen_node);
2006                                         cm_parent_listen_node->cm_core->stats_listen_nodes_created--;
2007                                 }
2008                         }
2009                         endfor_ifa(idev);
2010                         in_dev_put(idev);
2011                 }
2012         }
2013 exit:
2014         rtnl_unlock();
2015         return ret;
2016 }
2017
2018 /**
2019  * i40iw_dec_refcnt_listen - delete listener and associated cm nodes
2020  * @cm_core: cm's core
2021  * @free_hanging_nodes: to free associated cm_nodes
2022  * @apbvt_del: flag to delete the apbvt
2023  */
2024 static int i40iw_dec_refcnt_listen(struct i40iw_cm_core *cm_core,
2025                                    struct i40iw_cm_listener *listener,
2026                                    int free_hanging_nodes, bool apbvt_del)
2027 {
2028         int ret = -EINVAL;
2029         int err = 0;
2030         struct list_head *list_pos;
2031         struct list_head *list_temp;
2032         struct i40iw_cm_node *cm_node;
2033         struct list_head reset_list;
2034         struct i40iw_cm_info nfo;
2035         struct i40iw_cm_node *loopback;
2036         enum i40iw_cm_node_state old_state;
2037         unsigned long flags;
2038
2039         /* free non-accelerated child nodes for this listener */
2040         INIT_LIST_HEAD(&reset_list);
2041         if (free_hanging_nodes) {
2042                 spin_lock_irqsave(&cm_core->ht_lock, flags);
2043                 list_for_each_safe(list_pos, list_temp, &cm_core->connected_nodes) {
2044                         cm_node = container_of(list_pos, struct i40iw_cm_node, list);
2045                         if ((cm_node->listener == listener) && !cm_node->accelerated) {
2046                                 atomic_inc(&cm_node->ref_count);
2047                                 list_add(&cm_node->reset_entry, &reset_list);
2048                         }
2049                 }
2050                 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
2051         }
2052
2053         list_for_each_safe(list_pos, list_temp, &reset_list) {
2054                 cm_node = container_of(list_pos, struct i40iw_cm_node, reset_entry);
2055                 loopback = cm_node->loopbackpartner;
2056                 if (cm_node->state >= I40IW_CM_STATE_FIN_WAIT1) {
2057                         i40iw_rem_ref_cm_node(cm_node);
2058                 } else {
2059                         if (!loopback) {
2060                                 i40iw_cleanup_retrans_entry(cm_node);
2061                                 err = i40iw_send_reset(cm_node);
2062                                 if (err) {
2063                                         cm_node->state = I40IW_CM_STATE_CLOSED;
2064                                         i40iw_pr_err("send reset\n");
2065                                 } else {
2066                                         old_state = cm_node->state;
2067                                         cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED;
2068                                         if (old_state != I40IW_CM_STATE_MPAREQ_RCVD)
2069                                                 i40iw_rem_ref_cm_node(cm_node);
2070                                 }
2071                         } else {
2072                                 struct i40iw_cm_event event;
2073
2074                                 event.cm_node = loopback;
2075                                 memcpy(event.cm_info.rem_addr,
2076                                        loopback->rem_addr, sizeof(event.cm_info.rem_addr));
2077                                 memcpy(event.cm_info.loc_addr,
2078                                        loopback->loc_addr, sizeof(event.cm_info.loc_addr));
2079                                 event.cm_info.rem_port = loopback->rem_port;
2080                                 event.cm_info.loc_port = loopback->loc_port;
2081                                 event.cm_info.cm_id = loopback->cm_id;
2082                                 event.cm_info.ipv4 = loopback->ipv4;
2083                                 atomic_inc(&loopback->ref_count);
2084                                 loopback->state = I40IW_CM_STATE_CLOSED;
2085                                 i40iw_event_connect_error(&event);
2086                                 cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED;
2087                                 i40iw_rem_ref_cm_node(cm_node);
2088                         }
2089                 }
2090         }
2091
2092         if (!atomic_dec_return(&listener->ref_count)) {
2093                 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2094                 list_del(&listener->list);
2095                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2096
2097                 if (listener->iwdev) {
2098                         if (apbvt_del && !i40iw_listen_port_in_use(cm_core, listener->map_loc_port))
2099                                 i40iw_manage_apbvt(listener->iwdev,
2100                                                    listener->map_loc_port,
2101                                                    I40IW_MANAGE_APBVT_DEL);
2102
2103                         memcpy(nfo.loc_addr, listener->loc_addr, sizeof(nfo.loc_addr));
2104                         memcpy(nfo.map_loc_addr, listener->map_loc_addr, sizeof(nfo.map_loc_addr));
2105                         nfo.loc_port = listener->loc_port;
2106                         nfo.map_loc_port = listener->map_loc_port;
2107                         nfo.ipv4 = listener->ipv4;
2108                         nfo.vlan_id = listener->vlan_id;
2109
2110                         i40iw_remove_mapinfo(&nfo);
2111
2112                         if (!list_empty(&listener->child_listen_list)) {
2113                                 i40iw_del_multiple_qhash(listener->iwdev, &nfo, listener);
2114                         } else {
2115                                 if (listener->qhash_set)
2116                                         i40iw_manage_qhash(listener->iwdev,
2117                                                            &nfo,
2118                                                            I40IW_QHASH_TYPE_TCP_SYN,
2119                                                            I40IW_QHASH_MANAGE_TYPE_DELETE,
2120                                                            NULL,
2121                                                            false);
2122                         }
2123                 }
2124
2125                 cm_core->stats_listen_destroyed++;
2126                 kfree(listener);
2127                 cm_core->stats_listen_nodes_destroyed++;
2128                 listener = NULL;
2129                 ret = 0;
2130         }
2131
2132         if (listener) {
2133                 if (atomic_read(&listener->pend_accepts_cnt) > 0)
2134                         i40iw_debug(cm_core->dev,
2135                                     I40IW_DEBUG_CM,
2136                                     "%s: listener (%p) pending accepts=%u\n",
2137                                     __func__,
2138                                     listener,
2139                                     atomic_read(&listener->pend_accepts_cnt));
2140         }
2141
2142         return ret;
2143 }
2144
2145 /**
2146  * i40iw_cm_del_listen - delete a linstener
2147  * @cm_core: cm's core
2148   * @listener: passive connection's listener
2149  * @apbvt_del: flag to delete apbvt
2150  */
2151 static int i40iw_cm_del_listen(struct i40iw_cm_core *cm_core,
2152                                struct i40iw_cm_listener *listener,
2153                                bool apbvt_del)
2154 {
2155         listener->listener_state = I40IW_CM_LISTENER_PASSIVE_STATE;
2156         listener->cm_id = NULL; /* going to be destroyed pretty soon */
2157         return i40iw_dec_refcnt_listen(cm_core, listener, 1, apbvt_del);
2158 }
2159
2160 /**
2161  * i40iw_addr_resolve_neigh - resolve neighbor address
2162  * @iwdev: iwarp device structure
2163  * @src_ip: local ip address
2164  * @dst_ip: remote ip address
2165  * @arpindex: if there is an arp entry
2166  */
2167 static int i40iw_addr_resolve_neigh(struct i40iw_device *iwdev,
2168                                     u32 src_ip,
2169                                     u32 dst_ip,
2170                                     int arpindex)
2171 {
2172         struct rtable *rt;
2173         struct neighbour *neigh;
2174         int rc = arpindex;
2175         struct net_device *netdev = iwdev->netdev;
2176         __be32 dst_ipaddr = htonl(dst_ip);
2177         __be32 src_ipaddr = htonl(src_ip);
2178
2179         rt = ip_route_output(&init_net, dst_ipaddr, src_ipaddr, 0, 0);
2180         if (IS_ERR(rt)) {
2181                 i40iw_pr_err("ip_route_output\n");
2182                 return rc;
2183         }
2184
2185         if (netif_is_bond_slave(netdev))
2186                 netdev = netdev_master_upper_dev_get(netdev);
2187
2188         neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr);
2189
2190         rcu_read_lock();
2191         if (neigh) {
2192                 if (neigh->nud_state & NUD_VALID) {
2193                         if (arpindex >= 0) {
2194                                 if (ether_addr_equal(iwdev->arp_table[arpindex].mac_addr,
2195                                                      neigh->ha))
2196                                         /* Mac address same as arp table */
2197                                         goto resolve_neigh_exit;
2198                                 i40iw_manage_arp_cache(iwdev,
2199                                                        iwdev->arp_table[arpindex].mac_addr,
2200                                                        &dst_ip,
2201                                                        true,
2202                                                        I40IW_ARP_DELETE);
2203                         }
2204
2205                         i40iw_manage_arp_cache(iwdev, neigh->ha, &dst_ip, true, I40IW_ARP_ADD);
2206                         rc = i40iw_arp_table(iwdev, &dst_ip, true, NULL, I40IW_ARP_RESOLVE);
2207                 } else {
2208                         neigh_event_send(neigh, NULL);
2209                 }
2210         }
2211  resolve_neigh_exit:
2212
2213         rcu_read_unlock();
2214         if (neigh)
2215                 neigh_release(neigh);
2216
2217         ip_rt_put(rt);
2218         return rc;
2219 }
2220
2221 /**
2222  * i40iw_get_dst_ipv6
2223  */
2224 #if IS_ENABLED(CONFIG_IPV6)
2225 static struct dst_entry *i40iw_get_dst_ipv6(struct sockaddr_in6 *src_addr,
2226                                             struct sockaddr_in6 *dst_addr)
2227 {
2228         struct dst_entry *dst;
2229         struct flowi6 fl6;
2230
2231         memset(&fl6, 0, sizeof(fl6));
2232         fl6.daddr = dst_addr->sin6_addr;
2233         fl6.saddr = src_addr->sin6_addr;
2234         if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
2235                 fl6.flowi6_oif = dst_addr->sin6_scope_id;
2236
2237         dst = ip6_route_output(&init_net, NULL, &fl6);
2238         return dst;
2239 }
2240 #endif
2241
2242 /**
2243  * i40iw_addr_resolve_neigh_ipv6 - resolve neighbor ipv6 address
2244  * @iwdev: iwarp device structure
2245  * @dst_ip: remote ip address
2246  * @arpindex: if there is an arp entry
2247  */
2248 #if IS_ENABLED(CONFIG_IPV6)
2249 static int i40iw_addr_resolve_neigh_ipv6(struct i40iw_device *iwdev,
2250                                          u32 *src,
2251                                          u32 *dest,
2252                                          int arpindex)
2253 {
2254         struct neighbour *neigh;
2255         int rc = arpindex;
2256         struct net_device *netdev = iwdev->netdev;
2257         struct dst_entry *dst;
2258         struct sockaddr_in6 dst_addr;
2259         struct sockaddr_in6 src_addr;
2260
2261         memset(&dst_addr, 0, sizeof(dst_addr));
2262         dst_addr.sin6_family = AF_INET6;
2263         i40iw_copy_ip_htonl(dst_addr.sin6_addr.in6_u.u6_addr32, dest);
2264         memset(&src_addr, 0, sizeof(src_addr));
2265         src_addr.sin6_family = AF_INET6;
2266         i40iw_copy_ip_htonl(src_addr.sin6_addr.in6_u.u6_addr32, src);
2267         dst = i40iw_get_dst_ipv6(&src_addr, &dst_addr);
2268         if (!dst || dst->error) {
2269                 if (dst) {
2270                         dst_release(dst);
2271                         i40iw_pr_err("ip6_route_output returned dst->error = %d\n",
2272                                      dst->error);
2273                 }
2274                 return rc;
2275         }
2276
2277         if (netif_is_bond_slave(netdev))
2278                 netdev = netdev_master_upper_dev_get(netdev);
2279
2280         neigh = dst_neigh_lookup(dst, &dst_addr);
2281
2282         rcu_read_lock();
2283         if (neigh) {
2284                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "dst_neigh_lookup MAC=%pM\n", neigh->ha);
2285                 if (neigh->nud_state & NUD_VALID) {
2286                         if (arpindex >= 0) {
2287                                 if (ether_addr_equal
2288                                     (iwdev->arp_table[arpindex].mac_addr,
2289                                      neigh->ha)) {
2290                                         /* Mac address same as in arp table */
2291                                         goto resolve_neigh_exit6;
2292                                 }
2293                                 i40iw_manage_arp_cache(iwdev,
2294                                                        iwdev->arp_table[arpindex].mac_addr,
2295                                                        dest,
2296                                                        false,
2297                                                        I40IW_ARP_DELETE);
2298                         }
2299                         i40iw_manage_arp_cache(iwdev,
2300                                                neigh->ha,
2301                                                dest,
2302                                                false,
2303                                                I40IW_ARP_ADD);
2304                         rc = i40iw_arp_table(iwdev,
2305                                              dest,
2306                                              false,
2307                                              NULL,
2308                                              I40IW_ARP_RESOLVE);
2309                 } else {
2310                         neigh_event_send(neigh, NULL);
2311                 }
2312         }
2313
2314  resolve_neigh_exit6:
2315         rcu_read_unlock();
2316         if (neigh)
2317                 neigh_release(neigh);
2318         dst_release(dst);
2319         return rc;
2320 }
2321 #endif
2322
2323 /**
2324  * i40iw_ipv4_is_loopback - check if loopback
2325  * @loc_addr: local addr to compare
2326  * @rem_addr: remote address
2327  */
2328 static bool i40iw_ipv4_is_loopback(u32 loc_addr, u32 rem_addr)
2329 {
2330         return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr);
2331 }
2332
2333 /**
2334  * i40iw_ipv6_is_loopback - check if loopback
2335  * @loc_addr: local addr to compare
2336  * @rem_addr: remote address
2337  */
2338 static bool i40iw_ipv6_is_loopback(u32 *loc_addr, u32 *rem_addr)
2339 {
2340         struct in6_addr raddr6;
2341
2342         i40iw_copy_ip_htonl(raddr6.in6_u.u6_addr32, rem_addr);
2343         return (!memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6));
2344 }
2345
2346 /**
2347  * i40iw_make_cm_node - create a new instance of a cm node
2348  * @cm_core: cm's core
2349  * @iwdev: iwarp device structure
2350  * @cm_info: quad info for connection
2351  * @listener: passive connection's listener
2352  */
2353 static struct i40iw_cm_node *i40iw_make_cm_node(
2354                                    struct i40iw_cm_core *cm_core,
2355                                    struct i40iw_device *iwdev,
2356                                    struct i40iw_cm_info *cm_info,
2357                                    struct i40iw_cm_listener *listener)
2358 {
2359         struct i40iw_cm_node *cm_node;
2360         struct timespec ts;
2361         int oldarpindex;
2362         int arpindex;
2363         struct net_device *netdev = iwdev->netdev;
2364
2365         /* create an hte and cm_node for this instance */
2366         cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
2367         if (!cm_node)
2368                 return NULL;
2369
2370         /* set our node specific transport info */
2371         cm_node->ipv4 = cm_info->ipv4;
2372         cm_node->vlan_id = cm_info->vlan_id;
2373         memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr));
2374         memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr));
2375         memcpy(cm_node->map_loc_addr, cm_info->map_loc_addr,
2376                sizeof(cm_node->map_loc_addr));
2377         memcpy(cm_node->map_rem_addr, cm_info->map_rem_addr,
2378                sizeof(cm_node->map_rem_addr));
2379         cm_node->loc_port = cm_info->loc_port;
2380         cm_node->rem_port = cm_info->rem_port;
2381         cm_node->map_loc_port = cm_info->map_loc_port;
2382         cm_node->map_rem_port = cm_info->map_rem_port;
2383
2384         cm_node->mpa_frame_rev = iwdev->mpa_version;
2385         cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
2386         cm_node->ird_size = I40IW_MAX_IRD_SIZE;
2387         cm_node->ord_size = I40IW_MAX_ORD_SIZE;
2388
2389         cm_node->listener = listener;
2390         cm_node->cm_id = cm_info->cm_id;
2391         ether_addr_copy(cm_node->loc_mac, netdev->dev_addr);
2392         spin_lock_init(&cm_node->retrans_list_lock);
2393
2394         atomic_set(&cm_node->ref_count, 1);
2395         /* associate our parent CM core */
2396         cm_node->cm_core = cm_core;
2397         cm_node->tcp_cntxt.loc_id = I40IW_CM_DEF_LOCAL_ID;
2398         cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE;
2399         cm_node->tcp_cntxt.rcv_wnd =
2400                         I40IW_CM_DEFAULT_RCV_WND_SCALED >> I40IW_CM_DEFAULT_RCV_WND_SCALE;
2401         ts = current_kernel_time();
2402         cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
2403         cm_node->tcp_cntxt.mss = iwdev->mss;
2404
2405         cm_node->iwdev = iwdev;
2406         cm_node->dev = &iwdev->sc_dev;
2407
2408         if ((cm_node->ipv4 &&
2409              i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
2410              (!cm_node->ipv4 && i40iw_ipv6_is_loopback(cm_node->loc_addr,
2411                                                        cm_node->rem_addr))) {
2412                 arpindex = i40iw_arp_table(iwdev,
2413                                            cm_node->map_rem_addr,
2414                                            false,
2415                                            NULL,
2416                                            I40IW_ARP_RESOLVE);
2417         } else {
2418                 oldarpindex = i40iw_arp_table(iwdev,
2419                                               cm_node->map_rem_addr,
2420                                               false,
2421                                               NULL,
2422                                               I40IW_ARP_RESOLVE);
2423                 if (cm_node->ipv4)
2424                         arpindex = i40iw_addr_resolve_neigh(iwdev,
2425                                                             cm_info->map_loc_addr[0],
2426                                                             cm_info->map_rem_addr[0],
2427                                                             oldarpindex);
2428 #if IS_ENABLED(CONFIG_IPV6)
2429                 else
2430                         arpindex = i40iw_addr_resolve_neigh_ipv6(iwdev,
2431                                                                  cm_info->map_loc_addr,
2432                                                                  cm_info->map_rem_addr,
2433                                                                  oldarpindex);
2434 #endif
2435         }
2436         if (arpindex < 0) {
2437                 i40iw_pr_err("cm_node arpindex\n");
2438                 kfree(cm_node);
2439                 return NULL;
2440         }
2441         ether_addr_copy(cm_node->rem_mac, iwdev->arp_table[arpindex].mac_addr);
2442         i40iw_add_hte_node(cm_core, cm_node);
2443         cm_core->stats_nodes_created++;
2444         return cm_node;
2445 }
2446
2447 /**
2448  * i40iw_rem_ref_cm_node - destroy an instance of a cm node
2449  * @cm_node: connection's node
2450  */
2451 static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *cm_node)
2452 {
2453         struct i40iw_cm_core *cm_core = cm_node->cm_core;
2454         struct i40iw_qp *iwqp;
2455         struct i40iw_cm_info nfo;
2456         unsigned long flags;
2457
2458         spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
2459         if (atomic_dec_return(&cm_node->ref_count)) {
2460                 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
2461                 return;
2462         }
2463         list_del(&cm_node->list);
2464         spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
2465
2466         /* if the node is destroyed before connection was accelerated */
2467         if (!cm_node->accelerated && cm_node->accept_pend) {
2468                 pr_err("node destroyed before established\n");
2469                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
2470         }
2471         if (cm_node->close_entry)
2472                 i40iw_handle_close_entry(cm_node, 0);
2473         if (cm_node->listener) {
2474                 i40iw_dec_refcnt_listen(cm_core, cm_node->listener, 0, true);
2475         } else {
2476                 if (!i40iw_listen_port_in_use(cm_core, htons(cm_node->map_loc_port)) &&
2477                     cm_node->apbvt_set && cm_node->iwdev) {
2478                         i40iw_manage_apbvt(cm_node->iwdev,
2479                                            cm_node->map_loc_port,
2480                                            I40IW_MANAGE_APBVT_DEL);
2481                         i40iw_get_addr_info(cm_node, &nfo);
2482                         i40iw_remove_mapinfo(&nfo);
2483                         if (cm_node->qhash_set) {
2484                                 i40iw_manage_qhash(cm_node->iwdev,
2485                                                    &nfo,
2486                                                    I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2487                                                    I40IW_QHASH_MANAGE_TYPE_DELETE,
2488                                                    NULL,
2489                                                    false);
2490                                 cm_node->qhash_set = 0;
2491                         }
2492                 }
2493         }
2494
2495         iwqp = cm_node->iwqp;
2496         if (iwqp) {
2497                 iwqp->cm_node = NULL;
2498                 i40iw_rem_ref(&iwqp->ibqp);
2499                 cm_node->iwqp = NULL;
2500         } else if (cm_node->qhash_set) {
2501                 i40iw_get_addr_info(cm_node, &nfo);
2502                 i40iw_remove_mapinfo(&nfo);
2503                 i40iw_manage_qhash(cm_node->iwdev,
2504                                    &nfo,
2505                                    I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2506                                    I40IW_QHASH_MANAGE_TYPE_DELETE,
2507                                    NULL,
2508                                    false);
2509                 cm_node->qhash_set = 0;
2510         }
2511
2512         cm_node->cm_core->stats_nodes_destroyed++;
2513         kfree(cm_node);
2514 }
2515
2516 /**
2517  * i40iw_handle_fin_pkt - FIN packet received
2518  * @cm_node: connection's node
2519  */
2520 static void i40iw_handle_fin_pkt(struct i40iw_cm_node *cm_node)
2521 {
2522         u32 ret;
2523
2524         switch (cm_node->state) {
2525         case I40IW_CM_STATE_SYN_RCVD:
2526         case I40IW_CM_STATE_SYN_SENT:
2527         case I40IW_CM_STATE_ESTABLISHED:
2528         case I40IW_CM_STATE_MPAREJ_RCVD:
2529                 cm_node->tcp_cntxt.rcv_nxt++;
2530                 i40iw_cleanup_retrans_entry(cm_node);
2531                 cm_node->state = I40IW_CM_STATE_LAST_ACK;
2532                 i40iw_send_fin(cm_node);
2533                 break;
2534         case I40IW_CM_STATE_MPAREQ_SENT:
2535                 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
2536                 cm_node->tcp_cntxt.rcv_nxt++;
2537                 i40iw_cleanup_retrans_entry(cm_node);
2538                 cm_node->state = I40IW_CM_STATE_CLOSED;
2539                 atomic_inc(&cm_node->ref_count);
2540                 i40iw_send_reset(cm_node);
2541                 break;
2542         case I40IW_CM_STATE_FIN_WAIT1:
2543                 cm_node->tcp_cntxt.rcv_nxt++;
2544                 i40iw_cleanup_retrans_entry(cm_node);
2545                 cm_node->state = I40IW_CM_STATE_CLOSING;
2546                 i40iw_send_ack(cm_node);
2547                 /*
2548                  * Wait for ACK as this is simultaneous close.
2549                  * After we receive ACK, do not send anything.
2550                  * Just rm the node.
2551                  */
2552                 break;
2553         case I40IW_CM_STATE_FIN_WAIT2:
2554                 cm_node->tcp_cntxt.rcv_nxt++;
2555                 i40iw_cleanup_retrans_entry(cm_node);
2556                 cm_node->state = I40IW_CM_STATE_TIME_WAIT;
2557                 i40iw_send_ack(cm_node);
2558                 ret =
2559                     i40iw_schedule_cm_timer(cm_node, NULL, I40IW_TIMER_TYPE_CLOSE, 1, 0);
2560                 if (ret)
2561                         i40iw_pr_err("node %p state = %d\n", cm_node, cm_node->state);
2562                 break;
2563         case I40IW_CM_STATE_TIME_WAIT:
2564                 cm_node->tcp_cntxt.rcv_nxt++;
2565                 i40iw_cleanup_retrans_entry(cm_node);
2566                 cm_node->state = I40IW_CM_STATE_CLOSED;
2567                 i40iw_rem_ref_cm_node(cm_node);
2568                 break;
2569         case I40IW_CM_STATE_OFFLOADED:
2570         default:
2571                 i40iw_pr_err("bad state node %p state = %d\n", cm_node, cm_node->state);
2572                 break;
2573         }
2574 }
2575
2576 /**
2577  * i40iw_handle_rst_pkt - process received RST packet
2578  * @cm_node: connection's node
2579  * @rbuf: receive buffer
2580  */
2581 static void i40iw_handle_rst_pkt(struct i40iw_cm_node *cm_node,
2582                                  struct i40iw_puda_buf *rbuf)
2583 {
2584         i40iw_cleanup_retrans_entry(cm_node);
2585         switch (cm_node->state) {
2586         case I40IW_CM_STATE_SYN_SENT:
2587         case I40IW_CM_STATE_MPAREQ_SENT:
2588                 switch (cm_node->mpa_frame_rev) {
2589                 case IETF_MPA_V2:
2590                         cm_node->mpa_frame_rev = IETF_MPA_V1;
2591                         /* send a syn and goto syn sent state */
2592                         cm_node->state = I40IW_CM_STATE_SYN_SENT;
2593                         if (i40iw_send_syn(cm_node, 0))
2594                                 i40iw_active_open_err(cm_node, false);
2595                         break;
2596                 case IETF_MPA_V1:
2597                 default:
2598                         i40iw_active_open_err(cm_node, false);
2599                         break;
2600                 }
2601                 break;
2602         case I40IW_CM_STATE_MPAREQ_RCVD:
2603                 atomic_add_return(1, &cm_node->passive_state);
2604                 break;
2605         case I40IW_CM_STATE_ESTABLISHED:
2606         case I40IW_CM_STATE_SYN_RCVD:
2607         case I40IW_CM_STATE_LISTENING:
2608                 i40iw_pr_err("Bad state state = %d\n", cm_node->state);
2609                 i40iw_passive_open_err(cm_node, false);
2610                 break;
2611         case I40IW_CM_STATE_OFFLOADED:
2612                 i40iw_active_open_err(cm_node, false);
2613                 break;
2614         case I40IW_CM_STATE_CLOSED:
2615                 break;
2616         case I40IW_CM_STATE_FIN_WAIT2:
2617         case I40IW_CM_STATE_FIN_WAIT1:
2618         case I40IW_CM_STATE_LAST_ACK:
2619                 cm_node->cm_id->rem_ref(cm_node->cm_id);
2620         case I40IW_CM_STATE_TIME_WAIT:
2621                 cm_node->state = I40IW_CM_STATE_CLOSED;
2622                 i40iw_rem_ref_cm_node(cm_node);
2623                 break;
2624         default:
2625                 break;
2626         }
2627 }
2628
2629 /**
2630  * i40iw_handle_rcv_mpa - Process a recv'd mpa buffer
2631  * @cm_node: connection's node
2632  * @rbuf: receive buffer
2633  */
2634 static void i40iw_handle_rcv_mpa(struct i40iw_cm_node *cm_node,
2635                                  struct i40iw_puda_buf *rbuf)
2636 {
2637         int ret;
2638         int datasize = rbuf->datalen;
2639         u8 *dataloc = rbuf->data;
2640
2641         enum i40iw_cm_event_type type = I40IW_CM_EVENT_UNKNOWN;
2642         u32 res_type;
2643
2644         ret = i40iw_parse_mpa(cm_node, dataloc, &res_type, datasize);
2645         if (ret) {
2646                 if (cm_node->state == I40IW_CM_STATE_MPAREQ_SENT)
2647                         i40iw_active_open_err(cm_node, true);
2648                 else
2649                         i40iw_passive_open_err(cm_node, true);
2650                 return;
2651         }
2652
2653         switch (cm_node->state) {
2654         case I40IW_CM_STATE_ESTABLISHED:
2655                 if (res_type == I40IW_MPA_REQUEST_REJECT)
2656                         i40iw_pr_err("state for reject\n");
2657                 cm_node->state = I40IW_CM_STATE_MPAREQ_RCVD;
2658                 type = I40IW_CM_EVENT_MPA_REQ;
2659                 i40iw_send_ack(cm_node);        /* ACK received MPA request */
2660                 atomic_set(&cm_node->passive_state,
2661                            I40IW_PASSIVE_STATE_INDICATED);
2662                 break;
2663         case I40IW_CM_STATE_MPAREQ_SENT:
2664                 i40iw_cleanup_retrans_entry(cm_node);
2665                 if (res_type == I40IW_MPA_REQUEST_REJECT) {
2666                         type = I40IW_CM_EVENT_MPA_REJECT;
2667                         cm_node->state = I40IW_CM_STATE_MPAREJ_RCVD;
2668                 } else {
2669                         type = I40IW_CM_EVENT_CONNECTED;
2670                         cm_node->state = I40IW_CM_STATE_OFFLOADED;
2671                         i40iw_send_ack(cm_node);
2672                 }
2673                 break;
2674         default:
2675                 pr_err("%s wrong cm_node state =%d\n", __func__, cm_node->state);
2676                 break;
2677         }
2678         i40iw_create_event(cm_node, type);
2679 }
2680
2681 /**
2682  * i40iw_indicate_pkt_err - Send up err event to cm
2683  * @cm_node: connection's node
2684  */
2685 static void i40iw_indicate_pkt_err(struct i40iw_cm_node *cm_node)
2686 {
2687         switch (cm_node->state) {
2688         case I40IW_CM_STATE_SYN_SENT:
2689         case I40IW_CM_STATE_MPAREQ_SENT:
2690                 i40iw_active_open_err(cm_node, true);
2691                 break;
2692         case I40IW_CM_STATE_ESTABLISHED:
2693         case I40IW_CM_STATE_SYN_RCVD:
2694                 i40iw_passive_open_err(cm_node, true);
2695                 break;
2696         case I40IW_CM_STATE_OFFLOADED:
2697         default:
2698                 break;
2699         }
2700 }
2701
2702 /**
2703  * i40iw_check_syn - Check for error on received syn ack
2704  * @cm_node: connection's node
2705  * @tcph: pointer tcp header
2706  */
2707 static int i40iw_check_syn(struct i40iw_cm_node *cm_node, struct tcphdr *tcph)
2708 {
2709         int err = 0;
2710
2711         if (ntohl(tcph->ack_seq) != cm_node->tcp_cntxt.loc_seq_num) {
2712                 err = 1;
2713                 i40iw_active_open_err(cm_node, true);
2714         }
2715         return err;
2716 }
2717
2718 /**
2719  * i40iw_check_seq - check seq numbers if OK
2720  * @cm_node: connection's node
2721  * @tcph: pointer tcp header
2722  */
2723 static int i40iw_check_seq(struct i40iw_cm_node *cm_node, struct tcphdr *tcph)
2724 {
2725         int err = 0;
2726         u32 seq;
2727         u32 ack_seq;
2728         u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
2729         u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
2730         u32 rcv_wnd;
2731
2732         seq = ntohl(tcph->seq);
2733         ack_seq = ntohl(tcph->ack_seq);
2734         rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
2735         if (ack_seq != loc_seq_num)
2736                 err = -1;
2737         else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
2738                 err = -1;
2739         if (err) {
2740                 i40iw_pr_err("seq number\n");
2741                 i40iw_indicate_pkt_err(cm_node);
2742         }
2743         return err;
2744 }
2745
2746 /**
2747  * i40iw_handle_syn_pkt - is for Passive node
2748  * @cm_node: connection's node
2749  * @rbuf: receive buffer
2750  */
2751 static void i40iw_handle_syn_pkt(struct i40iw_cm_node *cm_node,
2752                                  struct i40iw_puda_buf *rbuf)
2753 {
2754         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2755         int ret;
2756         u32 inc_sequence;
2757         int optionsize;
2758         struct i40iw_cm_info nfo;
2759
2760         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2761         inc_sequence = ntohl(tcph->seq);
2762
2763         switch (cm_node->state) {
2764         case I40IW_CM_STATE_SYN_SENT:
2765         case I40IW_CM_STATE_MPAREQ_SENT:
2766                 /* Rcvd syn on active open connection */
2767                 i40iw_active_open_err(cm_node, 1);
2768                 break;
2769         case I40IW_CM_STATE_LISTENING:
2770                 /* Passive OPEN */
2771                 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
2772                     cm_node->listener->backlog) {
2773                         cm_node->cm_core->stats_backlog_drops++;
2774                         i40iw_passive_open_err(cm_node, false);
2775                         break;
2776                 }
2777                 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1);
2778                 if (ret) {
2779                         i40iw_passive_open_err(cm_node, false);
2780                         /* drop pkt */
2781                         break;
2782                 }
2783                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2784                 cm_node->accept_pend = 1;
2785                 atomic_inc(&cm_node->listener->pend_accepts_cnt);
2786
2787                 cm_node->state = I40IW_CM_STATE_SYN_RCVD;
2788                 i40iw_get_addr_info(cm_node, &nfo);
2789                 ret = i40iw_manage_qhash(cm_node->iwdev,
2790                                          &nfo,
2791                                          I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2792                                          I40IW_QHASH_MANAGE_TYPE_ADD,
2793                                          (void *)cm_node,
2794                                          false);
2795                 cm_node->qhash_set = true;
2796                 break;
2797         case I40IW_CM_STATE_CLOSED:
2798                 i40iw_cleanup_retrans_entry(cm_node);
2799                 atomic_inc(&cm_node->ref_count);
2800                 i40iw_send_reset(cm_node);
2801                 break;
2802         case I40IW_CM_STATE_OFFLOADED:
2803         case I40IW_CM_STATE_ESTABLISHED:
2804         case I40IW_CM_STATE_FIN_WAIT1:
2805         case I40IW_CM_STATE_FIN_WAIT2:
2806         case I40IW_CM_STATE_MPAREQ_RCVD:
2807         case I40IW_CM_STATE_LAST_ACK:
2808         case I40IW_CM_STATE_CLOSING:
2809         case I40IW_CM_STATE_UNKNOWN:
2810         default:
2811                 break;
2812         }
2813 }
2814
2815 /**
2816  * i40iw_handle_synack_pkt - Process SYN+ACK packet (active side)
2817  * @cm_node: connection's node
2818  * @rbuf: receive buffer
2819  */
2820 static void i40iw_handle_synack_pkt(struct i40iw_cm_node *cm_node,
2821                                     struct i40iw_puda_buf *rbuf)
2822 {
2823         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2824         int ret;
2825         u32 inc_sequence;
2826         int optionsize;
2827
2828         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2829         inc_sequence = ntohl(tcph->seq);
2830         switch (cm_node->state) {
2831         case I40IW_CM_STATE_SYN_SENT:
2832                 i40iw_cleanup_retrans_entry(cm_node);
2833                 /* active open */
2834                 if (i40iw_check_syn(cm_node, tcph)) {
2835                         i40iw_pr_err("check syn fail\n");
2836                         return;
2837                 }
2838                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2839                 /* setup options */
2840                 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 0);
2841                 if (ret) {
2842                         i40iw_debug(cm_node->dev,
2843                                     I40IW_DEBUG_CM,
2844                                     "cm_node=%p tcp_options failed\n",
2845                                     cm_node);
2846                         break;
2847                 }
2848                 i40iw_cleanup_retrans_entry(cm_node);
2849                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2850                 i40iw_send_ack(cm_node);        /* ACK  for the syn_ack */
2851                 ret = i40iw_send_mpa_request(cm_node);
2852                 if (ret) {
2853                         i40iw_debug(cm_node->dev,
2854                                     I40IW_DEBUG_CM,
2855                                     "cm_node=%p i40iw_send_mpa_request failed\n",
2856                                     cm_node);
2857                         break;
2858                 }
2859                 cm_node->state = I40IW_CM_STATE_MPAREQ_SENT;
2860                 break;
2861         case I40IW_CM_STATE_MPAREQ_RCVD:
2862                 i40iw_passive_open_err(cm_node, true);
2863                 break;
2864         case I40IW_CM_STATE_LISTENING:
2865                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2866                 i40iw_cleanup_retrans_entry(cm_node);
2867                 cm_node->state = I40IW_CM_STATE_CLOSED;
2868                 i40iw_send_reset(cm_node);
2869                 break;
2870         case I40IW_CM_STATE_CLOSED:
2871                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2872                 i40iw_cleanup_retrans_entry(cm_node);
2873                 atomic_inc(&cm_node->ref_count);
2874                 i40iw_send_reset(cm_node);
2875                 break;
2876         case I40IW_CM_STATE_ESTABLISHED:
2877         case I40IW_CM_STATE_FIN_WAIT1:
2878         case I40IW_CM_STATE_FIN_WAIT2:
2879         case I40IW_CM_STATE_LAST_ACK:
2880         case I40IW_CM_STATE_OFFLOADED:
2881         case I40IW_CM_STATE_CLOSING:
2882         case I40IW_CM_STATE_UNKNOWN:
2883         case I40IW_CM_STATE_MPAREQ_SENT:
2884         default:
2885                 break;
2886         }
2887 }
2888
2889 /**
2890  * i40iw_handle_ack_pkt - process packet with ACK
2891  * @cm_node: connection's node
2892  * @rbuf: receive buffer
2893  */
2894 static int i40iw_handle_ack_pkt(struct i40iw_cm_node *cm_node,
2895                                 struct i40iw_puda_buf *rbuf)
2896 {
2897         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2898         u32 inc_sequence;
2899         int ret = 0;
2900         int optionsize;
2901         u32 datasize = rbuf->datalen;
2902
2903         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2904
2905         if (i40iw_check_seq(cm_node, tcph))
2906                 return -EINVAL;
2907
2908         inc_sequence = ntohl(tcph->seq);
2909         switch (cm_node->state) {
2910         case I40IW_CM_STATE_SYN_RCVD:
2911                 i40iw_cleanup_retrans_entry(cm_node);
2912                 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1);
2913                 if (ret)
2914                         break;
2915                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2916                 cm_node->state = I40IW_CM_STATE_ESTABLISHED;
2917                 if (datasize) {
2918                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2919                         i40iw_get_remote_addr(cm_node);
2920                         i40iw_handle_rcv_mpa(cm_node, rbuf);
2921                 }
2922                 break;
2923         case I40IW_CM_STATE_ESTABLISHED:
2924                 i40iw_cleanup_retrans_entry(cm_node);
2925                 if (datasize) {
2926                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2927                         i40iw_handle_rcv_mpa(cm_node, rbuf);
2928                 }
2929                 break;
2930         case I40IW_CM_STATE_MPAREQ_SENT:
2931                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2932                 if (datasize) {
2933                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2934                         i40iw_handle_rcv_mpa(cm_node, rbuf);
2935                 }
2936                 break;
2937         case I40IW_CM_STATE_LISTENING:
2938                 i40iw_cleanup_retrans_entry(cm_node);
2939                 cm_node->state = I40IW_CM_STATE_CLOSED;
2940                 i40iw_send_reset(cm_node);
2941                 break;
2942         case I40IW_CM_STATE_CLOSED:
2943                 i40iw_cleanup_retrans_entry(cm_node);
2944                 atomic_inc(&cm_node->ref_count);
2945                 i40iw_send_reset(cm_node);
2946                 break;
2947         case I40IW_CM_STATE_LAST_ACK:
2948         case I40IW_CM_STATE_CLOSING:
2949                 i40iw_cleanup_retrans_entry(cm_node);
2950                 cm_node->state = I40IW_CM_STATE_CLOSED;
2951                 if (!cm_node->accept_pend)
2952                         cm_node->cm_id->rem_ref(cm_node->cm_id);
2953                 i40iw_rem_ref_cm_node(cm_node);
2954                 break;
2955         case I40IW_CM_STATE_FIN_WAIT1:
2956                 i40iw_cleanup_retrans_entry(cm_node);
2957                 cm_node->state = I40IW_CM_STATE_FIN_WAIT2;
2958                 break;
2959         case I40IW_CM_STATE_SYN_SENT:
2960         case I40IW_CM_STATE_FIN_WAIT2:
2961         case I40IW_CM_STATE_OFFLOADED:
2962         case I40IW_CM_STATE_MPAREQ_RCVD:
2963         case I40IW_CM_STATE_UNKNOWN:
2964         default:
2965                 i40iw_cleanup_retrans_entry(cm_node);
2966                 break;
2967         }
2968         return ret;
2969 }
2970
2971 /**
2972  * i40iw_process_packet - process cm packet
2973  * @cm_node: connection's node
2974  * @rbuf: receive buffer
2975  */
2976 static void i40iw_process_packet(struct i40iw_cm_node *cm_node,
2977                                  struct i40iw_puda_buf *rbuf)
2978 {
2979         enum i40iw_tcpip_pkt_type pkt_type = I40IW_PKT_TYPE_UNKNOWN;
2980         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2981         u32 fin_set = 0;
2982         int ret;
2983
2984         if (tcph->rst) {
2985                 pkt_type = I40IW_PKT_TYPE_RST;
2986         } else if (tcph->syn) {
2987                 pkt_type = I40IW_PKT_TYPE_SYN;
2988                 if (tcph->ack)
2989                         pkt_type = I40IW_PKT_TYPE_SYNACK;
2990         } else if (tcph->ack) {
2991                 pkt_type = I40IW_PKT_TYPE_ACK;
2992         }
2993         if (tcph->fin)
2994                 fin_set = 1;
2995
2996         switch (pkt_type) {
2997         case I40IW_PKT_TYPE_SYN:
2998                 i40iw_handle_syn_pkt(cm_node, rbuf);
2999                 break;
3000         case I40IW_PKT_TYPE_SYNACK:
3001                 i40iw_handle_synack_pkt(cm_node, rbuf);
3002                 break;
3003         case I40IW_PKT_TYPE_ACK:
3004                 ret = i40iw_handle_ack_pkt(cm_node, rbuf);
3005                 if (fin_set && !ret)
3006                         i40iw_handle_fin_pkt(cm_node);
3007                 break;
3008         case I40IW_PKT_TYPE_RST:
3009                 i40iw_handle_rst_pkt(cm_node, rbuf);
3010                 break;
3011         default:
3012                 if (fin_set &&
3013                     (!i40iw_check_seq(cm_node, (struct tcphdr *)rbuf->tcph)))
3014                         i40iw_handle_fin_pkt(cm_node);
3015                 break;
3016         }
3017 }
3018
3019 /**
3020  * i40iw_make_listen_node - create a listen node with params
3021  * @cm_core: cm's core
3022  * @iwdev: iwarp device structure
3023  * @cm_info: quad info for connection
3024  */
3025 static struct i40iw_cm_listener *i40iw_make_listen_node(
3026                                         struct i40iw_cm_core *cm_core,
3027                                         struct i40iw_device *iwdev,
3028                                         struct i40iw_cm_info *cm_info)
3029 {
3030         struct i40iw_cm_listener *listener;
3031         struct iwpm_dev_data pm_reg_msg;
3032         struct iwpm_sa_data pm_msg;
3033         int iwpm_err;
3034         unsigned long flags;
3035
3036         /* cannot have multiple matching listeners */
3037         listener = i40iw_find_listener(cm_core, cm_info->loc_addr,
3038                                        cm_info->loc_port,
3039                                        cm_info->vlan_id,
3040                                        I40IW_CM_LISTENER_EITHER_STATE,
3041                                        false);
3042         if (listener &&
3043             (listener->listener_state == I40IW_CM_LISTENER_ACTIVE_STATE)) {
3044                 atomic_dec(&listener->ref_count);
3045                 i40iw_debug(cm_core->dev,
3046                             I40IW_DEBUG_CM,
3047                             "Not creating listener since it already exists\n");
3048                 return NULL;
3049         }
3050
3051         if (!listener) {
3052                 i40iw_form_reg_msg(iwdev, &pm_reg_msg);
3053                 iwpm_err = iwpm_register_pid(&pm_reg_msg, RDMA_NL_I40IW);
3054                 if (iwpm_err)
3055                         i40iw_pr_err("PM register fail err = %d\n",
3056                                      iwpm_err);
3057
3058                 if (iwpm_valid_pid() && !iwpm_err) {
3059                         i40iw_form_pm_msg(cm_info, &pm_msg);
3060                         iwpm_err = iwpm_add_mapping(&pm_msg, RDMA_NL_I40IW);
3061                         if (iwpm_err)
3062                                 i40iw_pr_err("PM query fail err = %d\n",
3063                                              iwpm_err);
3064                         else
3065                                 i40iw_record_pm_msg(cm_info, &pm_msg, false);
3066                 }
3067
3068                 /* create a CM listen node (1/2 node to compare incoming traffic to) */
3069                 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
3070                 if (!listener)
3071                         return NULL;
3072                 cm_core->stats_listen_nodes_created++;
3073                 memcpy(listener->loc_addr, cm_info->loc_addr, sizeof(listener->loc_addr));
3074                 memcpy(listener->map_loc_addr, cm_info->map_loc_addr,
3075                        sizeof(listener->map_loc_addr));
3076                 listener->loc_port = cm_info->loc_port;
3077                 listener->map_loc_port = cm_info->map_loc_port;
3078
3079                 INIT_LIST_HEAD(&listener->child_listen_list);
3080
3081                 atomic_set(&listener->ref_count, 1);
3082         } else {
3083                 listener->reused_node = 1;
3084         }
3085
3086         listener->cm_id = cm_info->cm_id;
3087         listener->ipv4 = cm_info->ipv4;
3088         listener->vlan_id = cm_info->vlan_id;
3089         atomic_set(&listener->pend_accepts_cnt, 0);
3090         listener->cm_core = cm_core;
3091         listener->iwdev = iwdev;
3092
3093         listener->backlog = cm_info->backlog;
3094         listener->listener_state = I40IW_CM_LISTENER_ACTIVE_STATE;
3095
3096         if (!listener->reused_node) {
3097                 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
3098                 list_add(&listener->list, &cm_core->listen_nodes);
3099                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
3100         }
3101
3102         return listener;
3103 }
3104
3105 /**
3106  * i40iw_create_cm_node - make a connection node with params
3107  * @cm_core: cm's core
3108  * @iwdev: iwarp device structure
3109  * @private_data_len: len to provate data for mpa request
3110  * @private_data: pointer to private data for connection
3111  * @cm_info: quad info for connection
3112  */
3113 static struct i40iw_cm_node *i40iw_create_cm_node(
3114                                         struct i40iw_cm_core *cm_core,
3115                                         struct i40iw_device *iwdev,
3116                                         u16 private_data_len,
3117                                         void *private_data,
3118                                         struct i40iw_cm_info *cm_info)
3119 {
3120         int ret;
3121         struct i40iw_cm_node *cm_node;
3122         struct i40iw_cm_listener *loopback_remotelistener;
3123         struct i40iw_cm_node *loopback_remotenode;
3124         struct i40iw_cm_info loopback_cm_info;
3125
3126         /* create a CM connection node */
3127         cm_node = i40iw_make_cm_node(cm_core, iwdev, cm_info, NULL);
3128         if (!cm_node)
3129                 return NULL;
3130         /* set our node side to client (active) side */
3131         cm_node->tcp_cntxt.client = 1;
3132         cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE;
3133
3134         if (!memcmp(cm_info->loc_addr, cm_info->rem_addr, sizeof(cm_info->loc_addr))) {
3135                 loopback_remotelistener = i40iw_find_listener(
3136                                                 cm_core,
3137                                                 cm_info->map_rem_addr,
3138                                                 cm_node->map_rem_port,
3139                                                 cm_node->vlan_id,
3140                                                 I40IW_CM_LISTENER_ACTIVE_STATE,
3141                                                 true);
3142                 if (!loopback_remotelistener) {
3143                         i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
3144                 } else {
3145                         loopback_cm_info = *cm_info;
3146                         loopback_cm_info.loc_port = cm_info->rem_port;
3147                         loopback_cm_info.rem_port = cm_info->loc_port;
3148                         loopback_cm_info.map_loc_port = cm_info->map_rem_port;
3149                         loopback_cm_info.map_rem_port = cm_info->map_loc_port;
3150                         loopback_cm_info.cm_id = loopback_remotelistener->cm_id;
3151                         loopback_cm_info.ipv4 = cm_info->ipv4;
3152                         loopback_remotenode = i40iw_make_cm_node(cm_core,
3153                                                                  iwdev,
3154                                                                  &loopback_cm_info,
3155                                                                  loopback_remotelistener);
3156                         if (!loopback_remotenode) {
3157                                 i40iw_rem_ref_cm_node(cm_node);
3158                                 return NULL;
3159                         }
3160                         cm_core->stats_loopbacks++;
3161                         loopback_remotenode->loopbackpartner = cm_node;
3162                         loopback_remotenode->tcp_cntxt.rcv_wscale =
3163                                 I40IW_CM_DEFAULT_RCV_WND_SCALE;
3164                         cm_node->loopbackpartner = loopback_remotenode;
3165                         memcpy(loopback_remotenode->pdata_buf, private_data,
3166                                private_data_len);
3167                         loopback_remotenode->pdata.size = private_data_len;
3168
3169                         cm_node->state = I40IW_CM_STATE_OFFLOADED;
3170                         cm_node->tcp_cntxt.rcv_nxt =
3171                                 loopback_remotenode->tcp_cntxt.loc_seq_num;
3172                         loopback_remotenode->tcp_cntxt.rcv_nxt =
3173                                 cm_node->tcp_cntxt.loc_seq_num;
3174                         cm_node->tcp_cntxt.max_snd_wnd =
3175                                 loopback_remotenode->tcp_cntxt.rcv_wnd;
3176                         loopback_remotenode->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
3177                         cm_node->tcp_cntxt.snd_wnd = loopback_remotenode->tcp_cntxt.rcv_wnd;
3178                         loopback_remotenode->tcp_cntxt.snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
3179                         cm_node->tcp_cntxt.snd_wscale = loopback_remotenode->tcp_cntxt.rcv_wscale;
3180                         loopback_remotenode->tcp_cntxt.snd_wscale = cm_node->tcp_cntxt.rcv_wscale;
3181                         loopback_remotenode->state = I40IW_CM_STATE_MPAREQ_RCVD;
3182                         i40iw_create_event(loopback_remotenode, I40IW_CM_EVENT_MPA_REQ);
3183                 }
3184                 return cm_node;
3185         }
3186
3187         cm_node->pdata.size = private_data_len;
3188         cm_node->pdata.addr = cm_node->pdata_buf;
3189
3190         memcpy(cm_node->pdata_buf, private_data, private_data_len);
3191
3192         cm_node->state = I40IW_CM_STATE_SYN_SENT;
3193         ret = i40iw_send_syn(cm_node, 0);
3194
3195         if (ret) {
3196                 if (cm_node->ipv4)
3197                         i40iw_debug(cm_node->dev,
3198                                     I40IW_DEBUG_CM,
3199                                     "Api - connect() FAILED: dest addr=%pI4",
3200                                     cm_node->rem_addr);
3201                 else
3202                         i40iw_debug(cm_node->dev, I40IW_DEBUG_CM,
3203                                     "Api - connect() FAILED: dest addr=%pI6",
3204                                     cm_node->rem_addr);
3205                 i40iw_rem_ref_cm_node(cm_node);
3206                 cm_node = NULL;
3207         }
3208
3209         if (cm_node)
3210                 i40iw_debug(cm_node->dev,
3211                             I40IW_DEBUG_CM,
3212                             "Api - connect(): port=0x%04x, cm_node=%p, cm_id = %p.\n",
3213                             cm_node->rem_port,
3214                             cm_node,
3215                             cm_node->cm_id);
3216
3217         return cm_node;
3218 }
3219
3220 /**
3221  * i40iw_cm_reject - reject and teardown a connection
3222  * @cm_node: connection's node
3223  * @pdate: ptr to private data for reject
3224  * @plen: size of private data
3225  */
3226 static int i40iw_cm_reject(struct i40iw_cm_node *cm_node, const void *pdata, u8 plen)
3227 {
3228         int ret = 0;
3229         int err;
3230         int passive_state;
3231         struct iw_cm_id *cm_id = cm_node->cm_id;
3232         struct i40iw_cm_node *loopback = cm_node->loopbackpartner;
3233
3234         if (cm_node->tcp_cntxt.client)
3235                 return ret;
3236         i40iw_cleanup_retrans_entry(cm_node);
3237
3238         if (!loopback) {
3239                 passive_state = atomic_add_return(1, &cm_node->passive_state);
3240                 if (passive_state == I40IW_SEND_RESET_EVENT) {
3241                         cm_node->state = I40IW_CM_STATE_CLOSED;
3242                         i40iw_rem_ref_cm_node(cm_node);
3243                 } else {
3244                         if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
3245                                 i40iw_rem_ref_cm_node(cm_node);
3246                         } else {
3247                                 ret = i40iw_send_mpa_reject(cm_node, pdata, plen);
3248                                 if (ret) {
3249                                         cm_node->state = I40IW_CM_STATE_CLOSED;
3250                                         err = i40iw_send_reset(cm_node);
3251                                         if (err)
3252                                                 i40iw_pr_err("send reset failed\n");
3253                                 } else {
3254                                         cm_id->add_ref(cm_id);
3255                                 }
3256                         }
3257                 }
3258         } else {
3259                 cm_node->cm_id = NULL;
3260                 if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
3261                         i40iw_rem_ref_cm_node(cm_node);
3262                         i40iw_rem_ref_cm_node(loopback);
3263                 } else {
3264                         ret = i40iw_send_cm_event(loopback,
3265                                                   loopback->cm_id,
3266                                                   IW_CM_EVENT_CONNECT_REPLY,
3267                                                   -ECONNREFUSED);
3268                         i40iw_rem_ref_cm_node(cm_node);
3269                         loopback->state = I40IW_CM_STATE_CLOSING;
3270
3271                         cm_id = loopback->cm_id;
3272                         i40iw_rem_ref_cm_node(loopback);
3273                         cm_id->rem_ref(cm_id);
3274                 }
3275         }
3276
3277         return ret;
3278 }
3279
3280 /**
3281  * i40iw_cm_close - close of cm connection
3282  * @cm_node: connection's node
3283  */
3284 static int i40iw_cm_close(struct i40iw_cm_node *cm_node)
3285 {
3286         int ret = 0;
3287
3288         if (!cm_node)
3289                 return -EINVAL;
3290
3291         switch (cm_node->state) {
3292         case I40IW_CM_STATE_SYN_RCVD:
3293         case I40IW_CM_STATE_SYN_SENT:
3294         case I40IW_CM_STATE_ONE_SIDE_ESTABLISHED:
3295         case I40IW_CM_STATE_ESTABLISHED:
3296         case I40IW_CM_STATE_ACCEPTING:
3297         case I40IW_CM_STATE_MPAREQ_SENT:
3298         case I40IW_CM_STATE_MPAREQ_RCVD:
3299                 i40iw_cleanup_retrans_entry(cm_node);
3300                 i40iw_send_reset(cm_node);
3301                 break;
3302         case I40IW_CM_STATE_CLOSE_WAIT:
3303                 cm_node->state = I40IW_CM_STATE_LAST_ACK;
3304                 i40iw_send_fin(cm_node);
3305                 break;
3306         case I40IW_CM_STATE_FIN_WAIT1:
3307         case I40IW_CM_STATE_FIN_WAIT2:
3308         case I40IW_CM_STATE_LAST_ACK:
3309         case I40IW_CM_STATE_TIME_WAIT:
3310         case I40IW_CM_STATE_CLOSING:
3311                 ret = -1;
3312                 break;
3313         case I40IW_CM_STATE_LISTENING:
3314                 i40iw_cleanup_retrans_entry(cm_node);
3315                 i40iw_send_reset(cm_node);
3316                 break;
3317         case I40IW_CM_STATE_MPAREJ_RCVD:
3318         case I40IW_CM_STATE_UNKNOWN:
3319         case I40IW_CM_STATE_INITED:
3320         case I40IW_CM_STATE_CLOSED:
3321         case I40IW_CM_STATE_LISTENER_DESTROYED:
3322                 i40iw_rem_ref_cm_node(cm_node);
3323                 break;
3324         case I40IW_CM_STATE_OFFLOADED:
3325                 if (cm_node->send_entry)
3326                         i40iw_pr_err("send_entry\n");
3327                 i40iw_rem_ref_cm_node(cm_node);
3328                 break;
3329         }
3330         return ret;
3331 }
3332
3333 /**
3334  * i40iw_receive_ilq - recv an ETHERNET packet, and process it
3335  * through CM
3336  * @dev: FPK dev struct
3337  * @rbuf: receive buffer
3338  */
3339 void i40iw_receive_ilq(struct i40iw_sc_dev *dev, struct i40iw_puda_buf *rbuf)
3340 {
3341         struct i40iw_cm_node *cm_node;
3342         struct i40iw_cm_listener *listener;
3343         struct iphdr *iph;
3344         struct ipv6hdr *ip6h;
3345         struct tcphdr *tcph;
3346         struct i40iw_cm_info cm_info;
3347         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
3348         struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3349         struct vlan_ethhdr *ethh;
3350
3351         /* if vlan, then maclen = 18 else 14 */
3352         iph = (struct iphdr *)rbuf->iph;
3353         memset(&cm_info, 0, sizeof(cm_info));
3354
3355         i40iw_debug_buf(dev,
3356                         I40IW_DEBUG_ILQ,
3357                         "RECEIVE ILQ BUFFER",
3358                         rbuf->mem.va,
3359                         rbuf->totallen);
3360         ethh = (struct vlan_ethhdr *)rbuf->mem.va;
3361
3362         if (ethh->h_vlan_proto == htons(ETH_P_8021Q)) {
3363                 cm_info.vlan_id = ntohs(ethh->h_vlan_TCI) & VLAN_VID_MASK;
3364                 i40iw_debug(cm_core->dev,
3365                             I40IW_DEBUG_CM,
3366                             "%s vlan_id=%d\n",
3367                             __func__,
3368                             cm_info.vlan_id);
3369         } else {
3370                 cm_info.vlan_id = I40IW_NO_VLAN;
3371         }
3372         tcph = (struct tcphdr *)rbuf->tcph;
3373
3374         if (rbuf->ipv4) {
3375                 cm_info.loc_addr[0] = ntohl(iph->daddr);
3376                 cm_info.rem_addr[0] = ntohl(iph->saddr);
3377                 cm_info.ipv4 = true;
3378         } else {
3379                 ip6h = (struct ipv6hdr *)rbuf->iph;
3380                 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3381                                     ip6h->daddr.in6_u.u6_addr32);
3382                 i40iw_copy_ip_ntohl(cm_info.rem_addr,
3383                                     ip6h->saddr.in6_u.u6_addr32);
3384                 cm_info.ipv4 = false;
3385         }
3386         cm_info.loc_port = ntohs(tcph->dest);
3387         cm_info.rem_port = ntohs(tcph->source);
3388         i40iw_init_mapinfo(&cm_info);
3389
3390         cm_node = i40iw_find_node(cm_core,
3391                                   cm_info.map_rem_port,
3392                                   cm_info.map_rem_addr,
3393                                   cm_info.map_loc_port,
3394                                   cm_info.map_loc_addr,
3395                                   true);
3396
3397         if (!cm_node) {
3398                 /* Only type of packet accepted are for */
3399                 /* the PASSIVE open (syn only) */
3400                 if (!tcph->syn || tcph->ack)
3401                         return;
3402                 listener =
3403                     i40iw_find_listener(cm_core,
3404                                         cm_info.map_loc_addr,
3405                                         cm_info.map_loc_port,
3406                                         cm_info.vlan_id,
3407                                         I40IW_CM_LISTENER_ACTIVE_STATE,
3408                                         true);
3409                 if (!listener) {
3410                         cm_info.cm_id = NULL;
3411                         i40iw_debug(cm_core->dev,
3412                                     I40IW_DEBUG_CM,
3413                                     "%s no listener found\n",
3414                                     __func__);
3415                         return;
3416                 }
3417                 cm_info.cm_id = listener->cm_id;
3418                 cm_node = i40iw_make_cm_node(cm_core, iwdev, &cm_info, listener);
3419                 if (!cm_node) {
3420                         i40iw_debug(cm_core->dev,
3421                                     I40IW_DEBUG_CM,
3422                                     "%s allocate node failed\n",
3423                                     __func__);
3424                         atomic_dec(&listener->ref_count);
3425                         return;
3426                 }
3427                 if (!tcph->rst && !tcph->fin) {
3428                         cm_node->state = I40IW_CM_STATE_LISTENING;
3429                 } else {
3430                         i40iw_rem_ref_cm_node(cm_node);
3431                         return;
3432                 }
3433                 atomic_inc(&cm_node->ref_count);
3434         } else if (cm_node->state == I40IW_CM_STATE_OFFLOADED) {
3435                 i40iw_rem_ref_cm_node(cm_node);
3436                 return;
3437         }
3438         i40iw_process_packet(cm_node, rbuf);
3439         i40iw_rem_ref_cm_node(cm_node);
3440 }
3441
3442 /**
3443  * i40iw_setup_cm_core - allocate a top level instance of a cm
3444  * core
3445  * @iwdev: iwarp device structure
3446  */
3447 void i40iw_setup_cm_core(struct i40iw_device *iwdev)
3448 {
3449         struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3450
3451         cm_core->iwdev = iwdev;
3452         cm_core->dev = &iwdev->sc_dev;
3453
3454         INIT_LIST_HEAD(&cm_core->connected_nodes);
3455         INIT_LIST_HEAD(&cm_core->listen_nodes);
3456
3457         init_timer(&cm_core->tcp_timer);
3458         cm_core->tcp_timer.function = i40iw_cm_timer_tick;
3459         cm_core->tcp_timer.data = (unsigned long)cm_core;
3460
3461         spin_lock_init(&cm_core->ht_lock);
3462         spin_lock_init(&cm_core->listen_list_lock);
3463
3464         cm_core->event_wq = create_singlethread_workqueue("iwewq");
3465         cm_core->disconn_wq = create_singlethread_workqueue("iwdwq");
3466 }
3467
3468 /**
3469  * i40iw_cleanup_cm_core - deallocate a top level instance of a
3470  * cm core
3471  * @cm_core: cm's core
3472  */
3473 void i40iw_cleanup_cm_core(struct i40iw_cm_core *cm_core)
3474 {
3475         unsigned long flags;
3476
3477         if (!cm_core)
3478                 return;
3479
3480         spin_lock_irqsave(&cm_core->ht_lock, flags);
3481         if (timer_pending(&cm_core->tcp_timer))
3482                 del_timer_sync(&cm_core->tcp_timer);
3483         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
3484
3485         destroy_workqueue(cm_core->event_wq);
3486         destroy_workqueue(cm_core->disconn_wq);
3487 }
3488
3489 /**
3490  * i40iw_init_tcp_ctx - setup qp context
3491  * @cm_node: connection's node
3492  * @tcp_info: offload info for tcp
3493  * @iwqp: associate qp for the connection
3494  */
3495 static void i40iw_init_tcp_ctx(struct i40iw_cm_node *cm_node,
3496                                struct i40iw_tcp_offload_info *tcp_info,
3497                                struct i40iw_qp *iwqp)
3498 {
3499         tcp_info->ipv4 = cm_node->ipv4;
3500         tcp_info->drop_ooo_seg = true;
3501         tcp_info->wscale = true;
3502         tcp_info->ignore_tcp_opt = true;
3503         tcp_info->ignore_tcp_uns_opt = true;
3504         tcp_info->no_nagle = false;
3505
3506         tcp_info->ttl = I40IW_DEFAULT_TTL;
3507         tcp_info->rtt_var = cpu_to_le32(I40IW_DEFAULT_RTT_VAR);
3508         tcp_info->ss_thresh = cpu_to_le32(I40IW_DEFAULT_SS_THRESH);
3509         tcp_info->rexmit_thresh = I40IW_DEFAULT_REXMIT_THRESH;
3510
3511         tcp_info->tcp_state = I40IW_TCP_STATE_ESTABLISHED;
3512         tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale;
3513         tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale;
3514
3515         tcp_info->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3516         tcp_info->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
3517         tcp_info->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
3518         tcp_info->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3519
3520         tcp_info->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3521         tcp_info->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss);
3522         tcp_info->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
3523         tcp_info->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3524         tcp_info->max_snd_window = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
3525         tcp_info->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
3526                                         cm_node->tcp_cntxt.rcv_wscale);
3527
3528         tcp_info->flow_label = 0;
3529         tcp_info->snd_mss = cpu_to_le32(((u32)cm_node->tcp_cntxt.mss));
3530         if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
3531                 tcp_info->insert_vlan_tag = true;
3532                 tcp_info->vlan_tag = cpu_to_le16(cm_node->vlan_id);
3533         }
3534         if (cm_node->ipv4) {
3535                 tcp_info->src_port = cpu_to_le16(cm_node->map_loc_port);
3536                 tcp_info->dst_port = cpu_to_le16(cm_node->map_rem_port);
3537
3538                 tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->map_rem_addr[0]);
3539                 tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->map_loc_addr[0]);
3540                 tcp_info->arp_idx = cpu_to_le32(i40iw_arp_table(iwqp->iwdev,
3541                                                                 &tcp_info->dest_ip_addr3,
3542                                                                 true,
3543                                                                 NULL,
3544                                                                 I40IW_ARP_RESOLVE));
3545         } else {
3546                 tcp_info->src_port = cpu_to_le16(cm_node->map_loc_port);
3547                 tcp_info->dst_port = cpu_to_le16(cm_node->map_rem_port);
3548                 tcp_info->dest_ip_addr0 = cpu_to_le32(cm_node->map_rem_addr[0]);
3549                 tcp_info->dest_ip_addr1 = cpu_to_le32(cm_node->map_rem_addr[1]);
3550                 tcp_info->dest_ip_addr2 = cpu_to_le32(cm_node->map_rem_addr[2]);
3551                 tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->map_rem_addr[3]);
3552                 tcp_info->local_ipaddr0 = cpu_to_le32(cm_node->map_loc_addr[0]);
3553                 tcp_info->local_ipaddr1 = cpu_to_le32(cm_node->map_loc_addr[1]);
3554                 tcp_info->local_ipaddr2 = cpu_to_le32(cm_node->map_loc_addr[2]);
3555                 tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->map_loc_addr[3]);
3556                 tcp_info->arp_idx = cpu_to_le32(i40iw_arp_table(
3557                                                         iwqp->iwdev,
3558                                                         &tcp_info->dest_ip_addr0,
3559                                                         false,
3560                                                         NULL,
3561                                                         I40IW_ARP_RESOLVE));
3562         }
3563 }
3564
3565 /**
3566  * i40iw_cm_init_tsa_conn - setup qp for RTS
3567  * @iwqp: associate qp for the connection
3568  * @cm_node: connection's node
3569  */
3570 static void i40iw_cm_init_tsa_conn(struct i40iw_qp *iwqp,
3571                                    struct i40iw_cm_node *cm_node)
3572 {
3573         struct i40iw_tcp_offload_info tcp_info;
3574         struct i40iwarp_offload_info *iwarp_info;
3575         struct i40iw_qp_host_ctx_info *ctx_info;
3576         struct i40iw_device *iwdev = iwqp->iwdev;
3577         struct i40iw_sc_dev *dev = &iwqp->iwdev->sc_dev;
3578
3579         memset(&tcp_info, 0x00, sizeof(struct i40iw_tcp_offload_info));
3580         iwarp_info = &iwqp->iwarp_info;
3581         ctx_info = &iwqp->ctx_info;
3582
3583         ctx_info->tcp_info = &tcp_info;
3584         ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id;
3585         ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id;
3586
3587         iwarp_info->ord_size = cm_node->ord_size;
3588         iwarp_info->ird_size = i40iw_derive_hw_ird_setting(cm_node->ird_size);
3589
3590         if (iwarp_info->ord_size == 1)
3591                 iwarp_info->ord_size = 2;
3592
3593         iwarp_info->rd_enable = true;
3594         iwarp_info->rdmap_ver = 1;
3595         iwarp_info->ddp_ver = 1;
3596
3597         iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id;
3598
3599         ctx_info->tcp_info_valid = true;
3600         ctx_info->iwarp_info_valid = true;
3601
3602         i40iw_init_tcp_ctx(cm_node, &tcp_info, iwqp);
3603         if (cm_node->snd_mark_en) {
3604                 iwarp_info->snd_mark_en = true;
3605                 iwarp_info->snd_mark_offset = (tcp_info.snd_nxt &
3606                                 SNDMARKER_SEQNMASK) + cm_node->lsmm_size;
3607         }
3608
3609         cm_node->state = I40IW_CM_STATE_OFFLOADED;
3610         tcp_info.tcp_state = I40IW_TCP_STATE_ESTABLISHED;
3611         tcp_info.src_mac_addr_idx = iwdev->mac_ip_table_idx;
3612
3613         dev->iw_priv_qp_ops->qp_setctx(&iwqp->sc_qp, (u64 *)(iwqp->host_ctx.va), ctx_info);
3614
3615         /* once tcp_info is set, no need to do it again */
3616         ctx_info->tcp_info_valid = false;
3617         ctx_info->iwarp_info_valid = false;
3618 }
3619
3620 /**
3621  * i40iw_cm_disconn - when a connection is being closed
3622  * @iwqp: associate qp for the connection
3623  */
3624 int i40iw_cm_disconn(struct i40iw_qp *iwqp)
3625 {
3626         struct disconn_work *work;
3627         struct i40iw_device *iwdev = iwqp->iwdev;
3628         struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3629
3630         work = kzalloc(sizeof(*work), GFP_ATOMIC);
3631         if (!work)
3632                 return -ENOMEM; /* Timer will clean up */
3633
3634         i40iw_add_ref(&iwqp->ibqp);
3635         work->iwqp = iwqp;
3636         INIT_WORK(&work->work, i40iw_disconnect_worker);
3637         queue_work(cm_core->disconn_wq, &work->work);
3638         return 0;
3639 }
3640
3641 /**
3642  * i40iw_loopback_nop - Send a nop
3643  * @qp: associated hw qp
3644  */
3645 static void i40iw_loopback_nop(struct i40iw_sc_qp *qp)
3646 {
3647         u64 *wqe;
3648         u64 header;
3649
3650         wqe = qp->qp_uk.sq_base->elem;
3651         set_64bit_val(wqe, 0, 0);
3652         set_64bit_val(wqe, 8, 0);
3653         set_64bit_val(wqe, 16, 0);
3654
3655         header = LS_64(I40IWQP_OP_NOP, I40IWQPSQ_OPCODE) |
3656             LS_64(0, I40IWQPSQ_SIGCOMPL) |
3657             LS_64(qp->qp_uk.swqe_polarity, I40IWQPSQ_VALID);
3658         set_64bit_val(wqe, 24, header);
3659 }
3660
3661 /**
3662  * i40iw_qp_disconnect - free qp and close cm
3663  * @iwqp: associate qp for the connection
3664  */
3665 static void i40iw_qp_disconnect(struct i40iw_qp *iwqp)
3666 {
3667         struct i40iw_device *iwdev;
3668         struct i40iw_ib_device *iwibdev;
3669
3670         iwdev = to_iwdev(iwqp->ibqp.device);
3671         if (!iwdev) {
3672                 i40iw_pr_err("iwdev == NULL\n");
3673                 return;
3674         }
3675
3676         iwibdev = iwdev->iwibdev;
3677
3678         if (iwqp->active_conn) {
3679                 /* indicate this connection is NOT active */
3680                 iwqp->active_conn = 0;
3681         } else {
3682                 /* Need to free the Last Streaming Mode Message */
3683                 if (iwqp->ietf_mem.va) {
3684                         if (iwqp->lsmm_mr)
3685                                 iwibdev->ibdev.dereg_mr(iwqp->lsmm_mr);
3686                         i40iw_free_dma_mem(iwdev->sc_dev.hw, &iwqp->ietf_mem);
3687                 }
3688         }
3689
3690         /* close the CM node down if it is still active */
3691         if (iwqp->cm_node) {
3692                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "%s Call close API\n", __func__);
3693                 i40iw_cm_close(iwqp->cm_node);
3694         }
3695 }
3696
3697 /**
3698  * i40iw_cm_disconn_true - called by worker thread to disconnect qp
3699  * @iwqp: associate qp for the connection
3700  */
3701 static void i40iw_cm_disconn_true(struct i40iw_qp *iwqp)
3702 {
3703         struct iw_cm_id *cm_id;
3704         struct i40iw_device *iwdev;
3705         struct i40iw_sc_qp *qp = &iwqp->sc_qp;
3706         u16 last_ae;
3707         u8 original_hw_tcp_state;
3708         u8 original_ibqp_state;
3709         int disconn_status = 0;
3710         int issue_disconn = 0;
3711         int issue_close = 0;
3712         int issue_flush = 0;
3713         struct ib_event ibevent;
3714         unsigned long flags;
3715         int ret;
3716
3717         if (!iwqp) {
3718                 i40iw_pr_err("iwqp == NULL\n");
3719                 return;
3720         }
3721
3722         spin_lock_irqsave(&iwqp->lock, flags);
3723         cm_id = iwqp->cm_id;
3724         /* make sure we havent already closed this connection */
3725         if (!cm_id) {
3726                 spin_unlock_irqrestore(&iwqp->lock, flags);
3727                 return;
3728         }
3729
3730         iwdev = to_iwdev(iwqp->ibqp.device);
3731
3732         original_hw_tcp_state = iwqp->hw_tcp_state;
3733         original_ibqp_state = iwqp->ibqp_state;
3734         last_ae = iwqp->last_aeq;
3735
3736         if (qp->term_flags) {
3737                 issue_disconn = 1;
3738                 issue_close = 1;
3739                 iwqp->cm_id = NULL;
3740                 /*When term timer expires after cm_timer, don't want
3741                  *terminate-handler to issue cm_disconn which can re-free
3742                  *a QP even after its refcnt=0.
3743                  */
3744                 del_timer(&iwqp->terminate_timer);
3745                 if (!iwqp->flush_issued) {
3746                         iwqp->flush_issued = 1;
3747                         issue_flush = 1;
3748                 }
3749         } else if ((original_hw_tcp_state == I40IW_TCP_STATE_CLOSE_WAIT) ||
3750                    ((original_ibqp_state == IB_QPS_RTS) &&
3751                     (last_ae == I40IW_AE_LLP_CONNECTION_RESET))) {
3752                 issue_disconn = 1;
3753                 if (last_ae == I40IW_AE_LLP_CONNECTION_RESET)
3754                         disconn_status = -ECONNRESET;
3755         }
3756
3757         if (((original_hw_tcp_state == I40IW_TCP_STATE_CLOSED) ||
3758              (original_hw_tcp_state == I40IW_TCP_STATE_TIME_WAIT) ||
3759              (last_ae == I40IW_AE_RDMAP_ROE_BAD_LLP_CLOSE) ||
3760              (last_ae == I40IW_AE_LLP_CONNECTION_RESET))) {
3761                 issue_close = 1;
3762                 iwqp->cm_id = NULL;
3763                 if (!iwqp->flush_issued) {
3764                         iwqp->flush_issued = 1;
3765                         issue_flush = 1;
3766                 }
3767         }
3768
3769         spin_unlock_irqrestore(&iwqp->lock, flags);
3770         if (issue_flush && !iwqp->destroyed) {
3771                 /* Flush the queues */
3772                 i40iw_flush_wqes(iwdev, iwqp);
3773
3774                 if (qp->term_flags) {
3775                         ibevent.device = iwqp->ibqp.device;
3776                         ibevent.event = (qp->eventtype == TERM_EVENT_QP_FATAL) ?
3777                                         IB_EVENT_QP_FATAL : IB_EVENT_QP_ACCESS_ERR;
3778                         ibevent.element.qp = &iwqp->ibqp;
3779                         iwqp->ibqp.event_handler(&ibevent, iwqp->ibqp.qp_context);
3780                 }
3781         }
3782
3783         if (cm_id && cm_id->event_handler) {
3784                 if (issue_disconn) {
3785                         ret = i40iw_send_cm_event(NULL,
3786                                                   cm_id,
3787                                                   IW_CM_EVENT_DISCONNECT,
3788                                                   disconn_status);
3789
3790                         if (ret)
3791                                 i40iw_debug(&iwdev->sc_dev,
3792                                             I40IW_DEBUG_CM,
3793                                             "disconnect event failed %s: - cm_id = %p\n",
3794                                             __func__, cm_id);
3795                 }
3796                 if (issue_close) {
3797                         i40iw_qp_disconnect(iwqp);
3798                         cm_id->provider_data = iwqp;
3799                         ret = i40iw_send_cm_event(NULL, cm_id, IW_CM_EVENT_CLOSE, 0);
3800                         if (ret)
3801                                 i40iw_debug(&iwdev->sc_dev,
3802                                             I40IW_DEBUG_CM,
3803                                             "close event failed %s: - cm_id = %p\n",
3804                                             __func__, cm_id);
3805                         cm_id->rem_ref(cm_id);
3806                 }
3807         }
3808 }
3809
3810 /**
3811  * i40iw_disconnect_worker - worker for connection close
3812  * @work: points or disconn structure
3813  */
3814 static void i40iw_disconnect_worker(struct work_struct *work)
3815 {
3816         struct disconn_work *dwork = container_of(work, struct disconn_work, work);
3817         struct i40iw_qp *iwqp = dwork->iwqp;
3818
3819         kfree(dwork);
3820         i40iw_cm_disconn_true(iwqp);
3821         i40iw_rem_ref(&iwqp->ibqp);
3822 }
3823
3824 /**
3825  * i40iw_accept - registered call for connection to be accepted
3826  * @cm_id: cm information for passive connection
3827  * @conn_param: accpet parameters
3828  */
3829 int i40iw_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3830 {
3831         struct ib_qp *ibqp;
3832         struct i40iw_qp *iwqp;
3833         struct i40iw_device *iwdev;
3834         struct i40iw_sc_dev *dev;
3835         struct i40iw_cm_node *cm_node;
3836         struct ib_qp_attr attr;
3837         int passive_state;
3838         struct i40iw_ib_device *iwibdev;
3839         struct ib_mr *ibmr;
3840         struct i40iw_pd *iwpd;
3841         u16 buf_len = 0;
3842         struct i40iw_kmem_info accept;
3843         enum i40iw_status_code status;
3844         u64 tagged_offset;
3845
3846         memset(&attr, 0, sizeof(attr));
3847         ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn);
3848         if (!ibqp)
3849                 return -EINVAL;
3850
3851         iwqp = to_iwqp(ibqp);
3852         iwdev = iwqp->iwdev;
3853         dev = &iwdev->sc_dev;
3854         cm_node = (struct i40iw_cm_node *)cm_id->provider_data;
3855
3856         if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) {
3857                 cm_node->ipv4 = true;
3858                 cm_node->vlan_id = i40iw_get_vlan_ipv4(cm_node->loc_addr);
3859         } else {
3860                 cm_node->ipv4 = false;
3861                 i40iw_netdev_vlan_ipv6(cm_node->loc_addr, &cm_node->vlan_id, NULL);
3862         }
3863         i40iw_debug(cm_node->dev,
3864                     I40IW_DEBUG_CM,
3865                     "Accept vlan_id=%d\n",
3866                     cm_node->vlan_id);
3867         if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
3868                 if (cm_node->loopbackpartner)
3869                         i40iw_rem_ref_cm_node(cm_node->loopbackpartner);
3870                 i40iw_rem_ref_cm_node(cm_node);
3871                 return -EINVAL;
3872         }
3873
3874         passive_state = atomic_add_return(1, &cm_node->passive_state);
3875         if (passive_state == I40IW_SEND_RESET_EVENT) {
3876                 i40iw_rem_ref_cm_node(cm_node);
3877                 return -ECONNRESET;
3878         }
3879
3880         cm_node->cm_core->stats_accepts++;
3881         iwqp->cm_node = (void *)cm_node;
3882         cm_node->iwqp = iwqp;
3883
3884         buf_len = conn_param->private_data_len + I40IW_MAX_IETF_SIZE + MPA_ZERO_PAD_LEN;
3885
3886         status = i40iw_allocate_dma_mem(dev->hw, &iwqp->ietf_mem, buf_len, 1);
3887
3888         if (status)
3889                 return -ENOMEM;
3890         cm_node->pdata.size = conn_param->private_data_len;
3891         accept.addr = iwqp->ietf_mem.va;
3892         accept.size = i40iw_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY);
3893         memcpy(accept.addr + accept.size, conn_param->private_data,
3894                conn_param->private_data_len);
3895
3896         /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3897         if ((cm_node->ipv4 &&
3898              !i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
3899             (!cm_node->ipv4 &&
3900              !i40iw_ipv6_is_loopback(cm_node->loc_addr, cm_node->rem_addr))) {
3901                 iwibdev = iwdev->iwibdev;
3902                 iwpd = iwqp->iwpd;
3903                 tagged_offset = (uintptr_t)iwqp->ietf_mem.va;
3904                 ibmr = i40iw_reg_phys_mr(&iwpd->ibpd,
3905                                          iwqp->ietf_mem.pa,
3906                                          buf_len,
3907                                          IB_ACCESS_LOCAL_WRITE,
3908                                          &tagged_offset);
3909                 if (IS_ERR(ibmr)) {
3910                         i40iw_free_dma_mem(dev->hw, &iwqp->ietf_mem);
3911                         return -ENOMEM;
3912                 }
3913
3914                 ibmr->pd = &iwpd->ibpd;
3915                 ibmr->device = iwpd->ibpd.device;
3916                 iwqp->lsmm_mr = ibmr;
3917                 if (iwqp->page)
3918                         iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
3919                 if (is_remote_ne020_or_chelsio(cm_node))
3920                         dev->iw_priv_qp_ops->qp_send_lsmm(
3921                                                         &iwqp->sc_qp,
3922                                                         iwqp->ietf_mem.va,
3923                                                         (accept.size + conn_param->private_data_len),
3924                                                         ibmr->lkey);
3925                 else
3926                         dev->iw_priv_qp_ops->qp_send_lsmm(
3927                                                         &iwqp->sc_qp,
3928                                                         iwqp->ietf_mem.va,
3929                                                         (accept.size + conn_param->private_data_len + MPA_ZERO_PAD_LEN),
3930                                                         ibmr->lkey);
3931
3932         } else {
3933                 if (iwqp->page)
3934                         iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
3935                 i40iw_loopback_nop(&iwqp->sc_qp);
3936         }
3937
3938         if (iwqp->page)
3939                 kunmap(iwqp->page);
3940
3941         iwqp->cm_id = cm_id;
3942         cm_node->cm_id = cm_id;
3943
3944         cm_id->provider_data = (void *)iwqp;
3945         iwqp->active_conn = 0;
3946
3947         cm_node->lsmm_size = accept.size + conn_param->private_data_len;
3948         i40iw_cm_init_tsa_conn(iwqp, cm_node);
3949         cm_id->add_ref(cm_id);
3950         i40iw_add_ref(&iwqp->ibqp);
3951
3952         i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0);
3953
3954         attr.qp_state = IB_QPS_RTS;
3955         cm_node->qhash_set = false;
3956         i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
3957         if (cm_node->loopbackpartner) {
3958                 cm_node->loopbackpartner->pdata.size = conn_param->private_data_len;
3959
3960                 /* copy entire MPA frame to our cm_node's frame */
3961                 memcpy(cm_node->loopbackpartner->pdata_buf,
3962                        conn_param->private_data,
3963                        conn_param->private_data_len);
3964                 i40iw_create_event(cm_node->loopbackpartner, I40IW_CM_EVENT_CONNECTED);
3965         }
3966
3967         cm_node->accelerated = 1;
3968         if (cm_node->accept_pend) {
3969                 if (!cm_node->listener)
3970                         i40iw_pr_err("cm_node->listener NULL for passive node\n");
3971                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
3972                 cm_node->accept_pend = 0;
3973         }
3974         return 0;
3975 }
3976
3977 /**
3978  * i40iw_reject - registered call for connection to be rejected
3979  * @cm_id: cm information for passive connection
3980  * @pdata: private data to be sent
3981  * @pdata_len: private data length
3982  */
3983 int i40iw_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3984 {
3985         struct i40iw_device *iwdev;
3986         struct i40iw_cm_node *cm_node;
3987         struct i40iw_cm_node *loopback;
3988
3989         cm_node = (struct i40iw_cm_node *)cm_id->provider_data;
3990         loopback = cm_node->loopbackpartner;
3991         cm_node->cm_id = cm_id;
3992         cm_node->pdata.size = pdata_len;
3993
3994         iwdev = to_iwdev(cm_id->device);
3995         if (!iwdev)
3996                 return -EINVAL;
3997         cm_node->cm_core->stats_rejects++;
3998
3999         if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER)
4000                 return -EINVAL;
4001
4002         if (loopback) {
4003                 memcpy(&loopback->pdata_buf, pdata, pdata_len);
4004                 loopback->pdata.size = pdata_len;
4005         }
4006
4007         return i40iw_cm_reject(cm_node, pdata, pdata_len);
4008 }
4009
4010 /**
4011  * i40iw_connect - registered call for connection to be established
4012  * @cm_id: cm information for passive connection
4013  * @conn_param: Information about the connection
4014  */
4015 int i40iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
4016 {
4017         struct ib_qp *ibqp;
4018         struct i40iw_qp *iwqp;
4019         struct i40iw_device *iwdev;
4020         struct i40iw_cm_node *cm_node;
4021         struct i40iw_cm_info cm_info;
4022         struct sockaddr_in *laddr;
4023         struct sockaddr_in *raddr;
4024         struct sockaddr_in6 *laddr6;
4025         struct sockaddr_in6 *raddr6;
4026         struct iwpm_dev_data pm_reg_msg;
4027         struct iwpm_sa_data pm_msg;
4028         int apbvt_set = 0;
4029         enum i40iw_status_code status;
4030         int iwpm_err;
4031
4032         ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn);
4033         if (!ibqp)
4034                 return -EINVAL;
4035         iwqp = to_iwqp(ibqp);
4036         if (!iwqp)
4037                 return -EINVAL;
4038         iwdev = to_iwdev(iwqp->ibqp.device);
4039         if (!iwdev)
4040                 return -EINVAL;
4041
4042         laddr = (struct sockaddr_in *)&cm_id->local_addr;
4043         raddr = (struct sockaddr_in *)&cm_id->remote_addr;
4044         laddr6 = (struct sockaddr_in6 *)&cm_id->local_addr;
4045         raddr6 = (struct sockaddr_in6 *)&cm_id->remote_addr;
4046
4047         if (!(laddr->sin_port) || !(raddr->sin_port))
4048                 return -EINVAL;
4049
4050         iwqp->active_conn = 1;
4051         iwqp->cm_id = NULL;
4052         cm_id->provider_data = iwqp;
4053
4054         /* set up the connection params for the node */
4055         if (cm_id->remote_addr.ss_family == AF_INET) {
4056                 cm_info.ipv4 = true;
4057                 memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr));
4058                 memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr));
4059                 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
4060                 cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr);
4061                 cm_info.loc_port = ntohs(laddr->sin_port);
4062                 cm_info.rem_port = ntohs(raddr->sin_port);
4063                 cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr);
4064         } else {
4065                 cm_info.ipv4 = false;
4066                 i40iw_copy_ip_ntohl(cm_info.loc_addr,
4067                                     laddr6->sin6_addr.in6_u.u6_addr32);
4068                 i40iw_copy_ip_ntohl(cm_info.rem_addr,
4069                                     raddr6->sin6_addr.in6_u.u6_addr32);
4070                 cm_info.loc_port = ntohs(laddr6->sin6_port);
4071                 cm_info.rem_port = ntohs(raddr6->sin6_port);
4072                 i40iw_netdev_vlan_ipv6(cm_info.loc_addr, &cm_info.vlan_id, NULL);
4073         }
4074         i40iw_init_mapinfo(&cm_info);
4075         cm_info.cm_id = cm_id;
4076
4077         i40iw_form_reg_msg(iwdev, &pm_reg_msg);
4078         iwpm_err = iwpm_register_pid(&pm_reg_msg, RDMA_NL_I40IW);
4079         if (iwpm_err)
4080                 i40iw_pr_err("PM register fail err = %d\n",
4081                              iwpm_err);
4082
4083         if (iwpm_valid_pid() && !iwpm_err) {
4084                 i40iw_form_pm_msg(&cm_info, &pm_msg);
4085                 iwpm_err = iwpm_add_and_query_mapping(&pm_msg, RDMA_NL_I40IW);
4086                 if (iwpm_err)
4087                         i40iw_pr_err("PM query fail err = %d\n",
4088                                      iwpm_err);
4089                 else
4090                         i40iw_record_pm_msg(&cm_info, &pm_msg, true);
4091         }
4092
4093         if (i40iw_create_mapinfo(&cm_info)) {
4094                 i40iw_pr_err("Fail to create mapinfo\n");
4095                 return -ENOMEM;
4096         }
4097
4098         if ((cm_info.ipv4 && (laddr->sin_addr.s_addr != raddr->sin_addr.s_addr)) ||
4099             (!cm_info.ipv4 && memcmp(laddr6->sin6_addr.in6_u.u6_addr32,
4100                                      raddr6->sin6_addr.in6_u.u6_addr32,
4101                                      sizeof(laddr6->sin6_addr.in6_u.u6_addr32)))) {
4102                 status = i40iw_manage_qhash(iwdev,
4103                                             &cm_info,
4104                                             I40IW_QHASH_TYPE_TCP_ESTABLISHED,
4105                                             I40IW_QHASH_MANAGE_TYPE_ADD,
4106                                             NULL,
4107                                             true);
4108                 if (status) {
4109                         i40iw_remove_mapinfo(&cm_info);
4110                         return -EINVAL;
4111                 }
4112         }
4113         status = i40iw_manage_apbvt(iwdev, cm_info.map_loc_port, I40IW_MANAGE_APBVT_ADD);
4114         if (status) {
4115                 i40iw_remove_mapinfo(&cm_info);
4116                 i40iw_manage_qhash(iwdev,
4117                                    &cm_info,
4118                                    I40IW_QHASH_TYPE_TCP_ESTABLISHED,
4119                                    I40IW_QHASH_MANAGE_TYPE_DELETE,
4120                                    NULL,
4121                                    false);
4122                 return -EINVAL;
4123         }
4124
4125         apbvt_set = 1;
4126         cm_id->add_ref(cm_id);
4127         cm_node = i40iw_create_cm_node(&iwdev->cm_core, iwdev,
4128                                        conn_param->private_data_len,
4129                                        (void *)conn_param->private_data,
4130                                        &cm_info);
4131         if (!cm_node) {
4132                 i40iw_manage_qhash(iwdev,
4133                                    &cm_info,
4134                                    I40IW_QHASH_TYPE_TCP_ESTABLISHED,
4135                                    I40IW_QHASH_MANAGE_TYPE_DELETE,
4136                                    NULL,
4137                                    false);
4138
4139                 if (apbvt_set && !i40iw_listen_port_in_use(&iwdev->cm_core,
4140                                                            cm_info.map_loc_port))
4141                         i40iw_manage_apbvt(iwdev,
4142                                            cm_info.map_loc_port,
4143                                            I40IW_MANAGE_APBVT_DEL);
4144
4145                 i40iw_remove_mapinfo(&cm_info);
4146                 cm_id->rem_ref(cm_id);
4147                 iwdev->cm_core.stats_connect_errs++;
4148                 return -ENOMEM;
4149         }
4150
4151         i40iw_record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord);
4152         if (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO &&
4153             !cm_node->ord_size)
4154                 cm_node->ord_size = 1;
4155
4156         cm_node->apbvt_set = apbvt_set;
4157         cm_node->qhash_set = true;
4158         iwqp->cm_node = cm_node;
4159         cm_node->iwqp = iwqp;
4160         iwqp->cm_id = cm_id;
4161         i40iw_add_ref(&iwqp->ibqp);
4162         return 0;
4163 }
4164
4165 /**
4166  * i40iw_create_listen - registered call creating listener
4167  * @cm_id: cm information for passive connection
4168  * @backlog: to max accept pending count
4169  */
4170 int i40iw_create_listen(struct iw_cm_id *cm_id, int backlog)
4171 {
4172         struct i40iw_device *iwdev;
4173         struct i40iw_cm_listener *cm_listen_node;
4174         struct i40iw_cm_info cm_info;
4175         enum i40iw_status_code ret;
4176         struct sockaddr_in *laddr;
4177         struct sockaddr_in6 *laddr6;
4178         bool wildcard = false;
4179
4180         iwdev = to_iwdev(cm_id->device);
4181         if (!iwdev)
4182                 return -EINVAL;
4183
4184         laddr = (struct sockaddr_in *)&cm_id->local_addr;
4185         laddr6 = (struct sockaddr_in6 *)&cm_id->local_addr;
4186         memset(&cm_info, 0, sizeof(cm_info));
4187         if (laddr->sin_family == AF_INET) {
4188                 cm_info.ipv4 = true;
4189                 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
4190                 cm_info.loc_port = ntohs(laddr->sin_port);
4191
4192                 if (laddr->sin_addr.s_addr != INADDR_ANY)
4193                         cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr);
4194                 else
4195                         wildcard = true;
4196
4197         } else {
4198                 cm_info.ipv4 = false;
4199                 i40iw_copy_ip_ntohl(cm_info.loc_addr,
4200                                     laddr6->sin6_addr.in6_u.u6_addr32);
4201                 cm_info.loc_port = ntohs(laddr6->sin6_port);
4202                 if (ipv6_addr_type(&laddr6->sin6_addr) != IPV6_ADDR_ANY)
4203                         i40iw_netdev_vlan_ipv6(cm_info.loc_addr,
4204                                                &cm_info.vlan_id,
4205                                                NULL);
4206                 else
4207                         wildcard = true;
4208         }
4209         i40iw_init_mapinfo(&cm_info);
4210         cm_info.backlog = backlog;
4211         cm_info.cm_id = cm_id;
4212
4213         cm_listen_node = i40iw_make_listen_node(&iwdev->cm_core, iwdev, &cm_info);
4214         if (!cm_listen_node) {
4215                 i40iw_pr_err("cm_listen_node == NULL\n");
4216                 return -ENOMEM;
4217         }
4218
4219         cm_id->provider_data = cm_listen_node;
4220
4221         if (!cm_listen_node->reused_node) {
4222                 if (i40iw_create_mapinfo(&cm_info))
4223                         goto error;
4224                 if (wildcard) {
4225                         if (cm_info.ipv4)
4226                                 ret = i40iw_add_mqh_4(iwdev,
4227                                                       &cm_info,
4228                                                       cm_listen_node);
4229                         else
4230                                 ret = i40iw_add_mqh_6(iwdev,
4231                                                       &cm_info,
4232                                                       cm_listen_node);
4233                         if (ret)
4234                                 goto error;
4235
4236                         ret = i40iw_manage_apbvt(iwdev,
4237                                                  cm_info.map_loc_port,
4238                                                  I40IW_MANAGE_APBVT_ADD);
4239
4240                         if (ret)
4241                                 goto error;
4242                 } else {
4243                         ret = i40iw_manage_qhash(iwdev,
4244                                                  &cm_info,
4245                                                  I40IW_QHASH_TYPE_TCP_SYN,
4246                                                  I40IW_QHASH_MANAGE_TYPE_ADD,
4247                                                  NULL,
4248                                                  true);
4249                         if (ret)
4250                                 goto error;
4251                         cm_listen_node->qhash_set = true;
4252                         ret = i40iw_manage_apbvt(iwdev,
4253                                                  cm_info.map_loc_port,
4254                                                  I40IW_MANAGE_APBVT_ADD);
4255                         if (ret)
4256                                 goto error;
4257                 }
4258         }
4259         cm_id->add_ref(cm_id);
4260         cm_listen_node->cm_core->stats_listen_created++;
4261         return 0;
4262  error:
4263         i40iw_cm_del_listen(&iwdev->cm_core, (void *)cm_listen_node, false);
4264         return -EINVAL;
4265 }
4266
4267 /**
4268  * i40iw_destroy_listen - registered call to destroy listener
4269  * @cm_id: cm information for passive connection
4270  */
4271 int i40iw_destroy_listen(struct iw_cm_id *cm_id)
4272 {
4273         struct i40iw_device *iwdev;
4274
4275         iwdev = to_iwdev(cm_id->device);
4276         if (cm_id->provider_data)
4277                 i40iw_cm_del_listen(&iwdev->cm_core, cm_id->provider_data, true);
4278         else
4279                 i40iw_pr_err("cm_id->provider_data was NULL\n");
4280
4281         cm_id->rem_ref(cm_id);
4282
4283         return 0;
4284 }
4285
4286 /**
4287  * i40iw_cm_event_connected - handle connected active node
4288  * @event: the info for cm_node of connection
4289  */
4290 static void i40iw_cm_event_connected(struct i40iw_cm_event *event)
4291 {
4292         struct i40iw_qp *iwqp;
4293         struct i40iw_device *iwdev;
4294         struct i40iw_cm_node *cm_node;
4295         struct i40iw_sc_dev *dev;
4296         struct ib_qp_attr attr;
4297         struct iw_cm_id *cm_id;
4298         int status;
4299         bool read0;
4300
4301         cm_node = event->cm_node;
4302         cm_id = cm_node->cm_id;
4303         iwqp = (struct i40iw_qp *)cm_id->provider_data;
4304         iwdev = to_iwdev(iwqp->ibqp.device);
4305         dev = &iwdev->sc_dev;
4306
4307         if (iwqp->destroyed) {
4308                 status = -ETIMEDOUT;
4309                 goto error;
4310         }
4311         i40iw_cm_init_tsa_conn(iwqp, cm_node);
4312         read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO);
4313         if (iwqp->page)
4314                 iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
4315         dev->iw_priv_qp_ops->qp_send_rtt(&iwqp->sc_qp, read0);
4316         if (iwqp->page)
4317                 kunmap(iwqp->page);
4318         status = i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 0);
4319         if (status)
4320                 i40iw_pr_err("send cm event\n");
4321
4322         memset(&attr, 0, sizeof(attr));
4323         attr.qp_state = IB_QPS_RTS;
4324         cm_node->qhash_set = false;
4325         i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
4326
4327         cm_node->accelerated = 1;
4328         if (cm_node->accept_pend) {
4329                 if (!cm_node->listener)
4330                         i40iw_pr_err("listener is null for passive node\n");
4331                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
4332                 cm_node->accept_pend = 0;
4333         }
4334         return;
4335
4336 error:
4337         iwqp->cm_id = NULL;
4338         cm_id->provider_data = NULL;
4339         i40iw_send_cm_event(event->cm_node,
4340                             cm_id,
4341                             IW_CM_EVENT_CONNECT_REPLY,
4342                             status);
4343         cm_id->rem_ref(cm_id);
4344         i40iw_rem_ref_cm_node(event->cm_node);
4345 }
4346
4347 /**
4348  * i40iw_cm_event_reset - handle reset
4349  * @event: the info for cm_node of connection
4350  */
4351 static void i40iw_cm_event_reset(struct i40iw_cm_event *event)
4352 {
4353         struct i40iw_cm_node *cm_node = event->cm_node;
4354         struct iw_cm_id   *cm_id = cm_node->cm_id;
4355         struct i40iw_qp *iwqp;
4356
4357         if (!cm_id)
4358                 return;
4359
4360         iwqp = cm_id->provider_data;
4361         if (!iwqp)
4362                 return;
4363
4364         i40iw_debug(cm_node->dev,
4365                     I40IW_DEBUG_CM,
4366                     "reset event %p - cm_id = %p\n",
4367                      event->cm_node, cm_id);
4368         iwqp->cm_id = NULL;
4369
4370         i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT, -ECONNRESET);
4371         i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0);
4372 }
4373
4374 /**
4375  * i40iw_cm_event_handler - worker thread callback to send event to cm upper layer
4376  * @work: pointer of cm event info.
4377  */
4378 static void i40iw_cm_event_handler(struct work_struct *work)
4379 {
4380         struct i40iw_cm_event *event = container_of(work,
4381                                                     struct i40iw_cm_event,
4382                                                     event_work);
4383         struct i40iw_cm_node *cm_node;
4384
4385         if (!event || !event->cm_node || !event->cm_node->cm_core)
4386                 return;
4387
4388         cm_node = event->cm_node;
4389
4390         switch (event->type) {
4391         case I40IW_CM_EVENT_MPA_REQ:
4392                 i40iw_send_cm_event(cm_node,
4393                                     cm_node->cm_id,
4394                                     IW_CM_EVENT_CONNECT_REQUEST,
4395                                     0);
4396                 break;
4397         case I40IW_CM_EVENT_RESET:
4398                 i40iw_cm_event_reset(event);
4399                 break;
4400         case I40IW_CM_EVENT_CONNECTED:
4401                 if (!event->cm_node->cm_id ||
4402                     (event->cm_node->state != I40IW_CM_STATE_OFFLOADED))
4403                         break;
4404                 i40iw_cm_event_connected(event);
4405                 break;
4406         case I40IW_CM_EVENT_MPA_REJECT:
4407                 if (!event->cm_node->cm_id ||
4408                     (cm_node->state == I40IW_CM_STATE_OFFLOADED))
4409                         break;
4410                 i40iw_send_cm_event(cm_node,
4411                                     cm_node->cm_id,
4412                                     IW_CM_EVENT_CONNECT_REPLY,
4413                                     -ECONNREFUSED);
4414                 break;
4415         case I40IW_CM_EVENT_ABORTED:
4416                 if (!event->cm_node->cm_id ||
4417                     (event->cm_node->state == I40IW_CM_STATE_OFFLOADED))
4418                         break;
4419                 i40iw_event_connect_error(event);
4420                 break;
4421         default:
4422                 i40iw_pr_err("event type = %d\n", event->type);
4423                 break;
4424         }
4425
4426         event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
4427         i40iw_rem_ref_cm_node(event->cm_node);
4428         kfree(event);
4429 }
4430
4431 /**
4432  * i40iw_cm_post_event - queue event request for worker thread
4433  * @event: cm node's info for up event call
4434  */
4435 static void i40iw_cm_post_event(struct i40iw_cm_event *event)
4436 {
4437         atomic_inc(&event->cm_node->ref_count);
4438         event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
4439         INIT_WORK(&event->event_work, i40iw_cm_event_handler);
4440
4441         queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
4442 }