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/secure_seq.h>
  61 #include <net/tcp.h>
  62 #include <asm/checksum.h>
  63
  64 #include "i40iw.h"
  65
  66 static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *);
  67 static void i40iw_cm_post_event(struct i40iw_cm_event *event);
  68 static void i40iw_disconnect_worker(struct work_struct *work);
  69
  70 /**
  71  * i40iw_free_sqbuf - put back puda buffer if refcount = 0
  72  * @vsi: pointer to vsi structure
  73  * @buf: puda buffer to free
  74  */
  75 void i40iw_free_sqbuf(struct i40iw_sc_vsi *vsi, void *bufp)
  76 {
  77         struct i40iw_puda_buf *buf = (struct i40iw_puda_buf *)bufp;
  78         struct i40iw_puda_rsrc *ilq = vsi->ilq;
  79
  80         if (!atomic_dec_return(&buf->refcount))
  81                 i40iw_puda_ret_bufpool(ilq, buf);
  82 }
  83
  84 /**
  85  * i40iw_derive_hw_ird_setting - Calculate IRD
  86  *
  87  * @cm_ird: IRD of connection's node
  88  *
  89  * The ird from the connection is rounded to a supported HW
  90  * setting (2,8,32,64) and then encoded for ird_size field of
  91  * qp_ctx
  92  */
  93 static u8 i40iw_derive_hw_ird_setting(u16 cm_ird)
  94 {
  95         u8 encoded_ird_size;
  96
  97         /* ird_size field is encoded in qp_ctx */
  98         switch (cm_ird ? roundup_pow_of_two(cm_ird) : 0) {
  99         case I40IW_HW_IRD_SETTING_64:
 100                 encoded_ird_size = 3;
 101                 break;
 102         case I40IW_HW_IRD_SETTING_32:
 103         case I40IW_HW_IRD_SETTING_16:
 104                 encoded_ird_size = 2;
 105                 break;
 106         case I40IW_HW_IRD_SETTING_8:
 107         case I40IW_HW_IRD_SETTING_4:
 108                 encoded_ird_size = 1;
 109                 break;
 110         case I40IW_HW_IRD_SETTING_2:
 111         default:
 112                 encoded_ird_size = 0;
 113                 break;
 114         }
 115         return encoded_ird_size;
 116 }
 117
 118 /**
 119  * i40iw_record_ird_ord - Record IRD/ORD passed in
 120  * @cm_node: connection's node
 121  * @conn_ird: connection IRD
 122  * @conn_ord: connection ORD
 123  */
 124 static void i40iw_record_ird_ord(struct i40iw_cm_node *cm_node, u32 conn_ird,
 125                                  u32 conn_ord)
 126 {
 127         if (conn_ird > I40IW_MAX_IRD_SIZE)
 128                 conn_ird = I40IW_MAX_IRD_SIZE;
 129
 130         if (conn_ord > I40IW_MAX_ORD_SIZE)
 131                 conn_ord = I40IW_MAX_ORD_SIZE;
 132         else if (!conn_ord && cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO)
 133                 conn_ord = 1;
 134
 135         cm_node->ird_size = conn_ird;
 136         cm_node->ord_size = conn_ord;
 137 }
 138
 139 /**
 140  * i40iw_copy_ip_ntohl - change network to host ip
 141  * @dst: host ip
 142  * @src: big endian
 143  */
 144 void i40iw_copy_ip_ntohl(u32 *dst, __be32 *src)
 145 {
 146         *dst++ = ntohl(*src++);
 147         *dst++ = ntohl(*src++);
 148         *dst++ = ntohl(*src++);
 149         *dst = ntohl(*src);
 150 }
 151
 152 /**
 153  * i40iw_copy_ip_htonl - change host addr to network ip
 154  * @dst: host ip
 155  * @src: little endian
 156  */
 157 static inline void i40iw_copy_ip_htonl(__be32 *dst, u32 *src)
 158 {
 159         *dst++ = htonl(*src++);
 160         *dst++ = htonl(*src++);
 161         *dst++ = htonl(*src++);
 162         *dst = htonl(*src);
 163 }
 164
 165 /**
 166  * i40iw_fill_sockaddr4 - get addr info for passive connection
 167  * @cm_node: connection's node
 168  * @event: upper layer's cm event
 169  */
 170 static inline void i40iw_fill_sockaddr4(struct i40iw_cm_node *cm_node,
 171                                         struct iw_cm_event *event)
 172 {
 173         struct sockaddr_in *laddr = (struct sockaddr_in *)&event->local_addr;
 174         struct sockaddr_in *raddr = (struct sockaddr_in *)&event->remote_addr;
 175
 176         laddr->sin_family = AF_INET;
 177         raddr->sin_family = AF_INET;
 178
 179         laddr->sin_port = htons(cm_node->loc_port);
 180         raddr->sin_port = htons(cm_node->rem_port);
 181
 182         laddr->sin_addr.s_addr = htonl(cm_node->loc_addr[0]);
 183         raddr->sin_addr.s_addr = htonl(cm_node->rem_addr[0]);
 184 }
 185
 186 /**
 187  * i40iw_fill_sockaddr6 - get ipv6 addr info for passive side
 188  * @cm_node: connection's node
 189  * @event: upper layer's cm event
 190  */
 191 static inline void i40iw_fill_sockaddr6(struct i40iw_cm_node *cm_node,
 192                                         struct iw_cm_event *event)
 193 {
 194         struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)&event->local_addr;
 195         struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)&event->remote_addr;
 196
 197         laddr6->sin6_family = AF_INET6;
 198         raddr6->sin6_family = AF_INET6;
 199
 200         laddr6->sin6_port = htons(cm_node->loc_port);
 201         raddr6->sin6_port = htons(cm_node->rem_port);
 202
 203         i40iw_copy_ip_htonl(laddr6->sin6_addr.in6_u.u6_addr32,
 204                             cm_node->loc_addr);
 205         i40iw_copy_ip_htonl(raddr6->sin6_addr.in6_u.u6_addr32,
 206                             cm_node->rem_addr);
 207 }
 208
 209 /**
 210  * i40iw_get_addr_info
 211  * @cm_node: contains ip/tcp info
 212  * @cm_info: to get a copy of the cm_node ip/tcp info
 213 */
 214 static void i40iw_get_addr_info(struct i40iw_cm_node *cm_node,
 215                                 struct i40iw_cm_info *cm_info)
 216 {
 217         cm_info->ipv4 = cm_node->ipv4;
 218         cm_info->vlan_id = cm_node->vlan_id;
 219         memcpy(cm_info->loc_addr, cm_node->loc_addr, sizeof(cm_info->loc_addr));
 220         memcpy(cm_info->rem_addr, cm_node->rem_addr, sizeof(cm_info->rem_addr));
 221         cm_info->loc_port = cm_node->loc_port;
 222         cm_info->rem_port = cm_node->rem_port;
 223         cm_info->user_pri = cm_node->user_pri;
 224 }
 225
 226 /**
 227  * i40iw_get_cmevent_info - for cm event upcall
 228  * @cm_node: connection's node
 229  * @cm_id: upper layers cm struct for the event
 230  * @event: upper layer's cm event
 231  */
 232 static inline void i40iw_get_cmevent_info(struct i40iw_cm_node *cm_node,
 233                                           struct iw_cm_id *cm_id,
 234                                           struct iw_cm_event *event)
 235 {
 236         memcpy(&event->local_addr, &cm_id->m_local_addr,
 237                sizeof(event->local_addr));
 238         memcpy(&event->remote_addr, &cm_id->m_remote_addr,
 239                sizeof(event->remote_addr));
 240         if (cm_node) {
 241                 event->private_data = (void *)cm_node->pdata_buf;
 242                 event->private_data_len = (u8)cm_node->pdata.size;
 243                 event->ird = cm_node->ird_size;
 244                 event->ord = cm_node->ord_size;
 245         }
 246 }
 247
 248 /**
 249  * i40iw_send_cm_event - upcall cm's event handler
 250  * @cm_node: connection's node
 251  * @cm_id: upper layer's cm info struct
 252  * @type: Event type to indicate
 253  * @status: status for the event type
 254  */
 255 static int i40iw_send_cm_event(struct i40iw_cm_node *cm_node,
 256                                struct iw_cm_id *cm_id,
 257                                enum iw_cm_event_type type,
 258                                int status)
 259 {
 260         struct iw_cm_event event;
 261
 262         memset(&event, 0, sizeof(event));
 263         event.event = type;
 264         event.status = status;
 265         switch (type) {
 266         case IW_CM_EVENT_CONNECT_REQUEST:
 267                 if (cm_node->ipv4)
 268                         i40iw_fill_sockaddr4(cm_node, &event);
 269                 else
 270                         i40iw_fill_sockaddr6(cm_node, &event);
 271                 event.provider_data = (void *)cm_node;
 272                 event.private_data = (void *)cm_node->pdata_buf;
 273                 event.private_data_len = (u8)cm_node->pdata.size;
 274                 event.ird = cm_node->ird_size;
 275                 break;
 276         case IW_CM_EVENT_CONNECT_REPLY:
 277                 i40iw_get_cmevent_info(cm_node, cm_id, &event);
 278                 break;
 279         case IW_CM_EVENT_ESTABLISHED:
 280                 event.ird = cm_node->ird_size;
 281                 event.ord = cm_node->ord_size;
 282                 break;
 283         case IW_CM_EVENT_DISCONNECT:
 284                 break;
 285         case IW_CM_EVENT_CLOSE:
 286                 break;
 287         default:
 288                 i40iw_pr_err("event type received type = %d\n", type);
 289                 return -1;
 290         }
 291         return cm_id->event_handler(cm_id, &event);
 292 }
 293
 294 /**
 295  * i40iw_create_event - create cm event
 296  * @cm_node: connection's node
 297  * @type: Event type to generate
 298  */
 299 static struct i40iw_cm_event *i40iw_create_event(struct i40iw_cm_node *cm_node,
 300                                                  enum i40iw_cm_event_type type)
 301 {
 302         struct i40iw_cm_event *event;
 303
 304         if (!cm_node->cm_id)
 305                 return NULL;
 306
 307         event = kzalloc(sizeof(*event), GFP_ATOMIC);
 308
 309         if (!event)
 310                 return NULL;
 311
 312         event->type = type;
 313         event->cm_node = cm_node;
 314         memcpy(event->cm_info.rem_addr, cm_node->rem_addr, sizeof(event->cm_info.rem_addr));
 315         memcpy(event->cm_info.loc_addr, cm_node->loc_addr, sizeof(event->cm_info.loc_addr));
 316         event->cm_info.rem_port = cm_node->rem_port;
 317         event->cm_info.loc_port = cm_node->loc_port;
 318         event->cm_info.cm_id = cm_node->cm_id;
 319
 320         i40iw_debug(cm_node->dev,
 321                     I40IW_DEBUG_CM,
 322                     "node=%p event=%p type=%u dst=%pI4 src=%pI4\n",
 323                     cm_node,
 324                     event,
 325                     type,
 326                     event->cm_info.loc_addr,
 327                     event->cm_info.rem_addr);
 328
 329         i40iw_cm_post_event(event);
 330         return event;
 331 }
 332
 333 /**
 334  * i40iw_free_retrans_entry - free send entry
 335  * @cm_node: connection's node
 336  */
 337 static void i40iw_free_retrans_entry(struct i40iw_cm_node *cm_node)
 338 {
 339         struct i40iw_device *iwdev = cm_node->iwdev;
 340         struct i40iw_timer_entry *send_entry;
 341
 342         send_entry = cm_node->send_entry;
 343         if (send_entry) {
 344                 cm_node->send_entry = NULL;
 345                 i40iw_free_sqbuf(&iwdev->vsi, (void *)send_entry->sqbuf);
 346                 kfree(send_entry);
 347                 atomic_dec(&cm_node->ref_count);
 348         }
 349 }
 350
 351 /**
 352  * i40iw_cleanup_retrans_entry - free send entry with lock
 353  * @cm_node: connection's node
 354  */
 355 static void i40iw_cleanup_retrans_entry(struct i40iw_cm_node *cm_node)
 356 {
 357         unsigned long flags;
 358
 359         spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
 360         i40iw_free_retrans_entry(cm_node);
 361         spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
 362 }
 363
 364 /**
 365  * i40iw_form_cm_frame - get a free packet and build frame
 366  * @cm_node: connection's node ionfo to use in frame
 367  * @options: pointer to options info
 368  * @hdr: pointer mpa header
 369  * @pdata: pointer to private data
 370  * @flags:  indicates FIN or ACK
 371  */
 372 static struct i40iw_puda_buf *i40iw_form_cm_frame(struct i40iw_cm_node *cm_node,
 373                                                   struct i40iw_kmem_info *options,
 374                                                   struct i40iw_kmem_info *hdr,
 375                                                   struct i40iw_kmem_info *pdata,
 376                                                   u8 flags)
 377 {
 378         struct i40iw_puda_buf *sqbuf;
 379         struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi;
 380         u8 *buf;
 381
 382         struct tcphdr *tcph;
 383         struct iphdr *iph;
 384         struct ipv6hdr *ip6h;
 385         struct ethhdr *ethh;
 386         u16 packetsize;
 387         u16 eth_hlen = ETH_HLEN;
 388         u32 opts_len = 0;
 389         u32 pd_len = 0;
 390         u32 hdr_len = 0;
 391         u16 vtag;
 392
 393         sqbuf = i40iw_puda_get_bufpool(vsi->ilq);
 394         if (!sqbuf)
 395                 return NULL;
 396         buf = sqbuf->mem.va;
 397
 398         if (options)
 399                 opts_len = (u32)options->size;
 400
 401         if (hdr)
 402                 hdr_len = hdr->size;
 403
 404         if (pdata)
 405                 pd_len = pdata->size;
 406
 407         if (cm_node->vlan_id <= VLAN_VID_MASK)
 408                 eth_hlen += 4;
 409
 410         if (cm_node->ipv4)
 411                 packetsize = sizeof(*iph) + sizeof(*tcph);
 412         else
 413                 packetsize = sizeof(*ip6h) + sizeof(*tcph);
 414         packetsize += opts_len + hdr_len + pd_len;
 415
 416         memset(buf, 0x00, eth_hlen + packetsize);
 417
 418         sqbuf->totallen = packetsize + eth_hlen;
 419         sqbuf->maclen = eth_hlen;
 420         sqbuf->tcphlen = sizeof(*tcph) + opts_len;
 421         sqbuf->scratch = (void *)cm_node;
 422
 423         ethh = (struct ethhdr *)buf;
 424         buf += eth_hlen;
 425
 426         if (cm_node->ipv4) {
 427                 sqbuf->ipv4 = true;
 428
 429                 iph = (struct iphdr *)buf;
 430                 buf += sizeof(*iph);
 431                 tcph = (struct tcphdr *)buf;
 432                 buf += sizeof(*tcph);
 433
 434                 ether_addr_copy(ethh->h_dest, cm_node->rem_mac);
 435                 ether_addr_copy(ethh->h_source, cm_node->loc_mac);
 436                 if (cm_node->vlan_id <= VLAN_VID_MASK) {
 437                         ((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q);
 438                         vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) | cm_node->vlan_id;
 439                         ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(vtag);
 440
 441                         ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IP);
 442                 } else {
 443                         ethh->h_proto = htons(ETH_P_IP);
 444                 }
 445
 446                 iph->version = IPVERSION;
 447                 iph->ihl = 5;   /* 5 * 4Byte words, IP headr len */
 448                 iph->tos = cm_node->tos;
 449                 iph->tot_len = htons(packetsize);
 450                 iph->id = htons(++cm_node->tcp_cntxt.loc_id);
 451
 452                 iph->frag_off = htons(0x4000);
 453                 iph->ttl = 0x40;
 454                 iph->protocol = IPPROTO_TCP;
 455                 iph->saddr = htonl(cm_node->loc_addr[0]);
 456                 iph->daddr = htonl(cm_node->rem_addr[0]);
 457         } else {
 458                 sqbuf->ipv4 = false;
 459                 ip6h = (struct ipv6hdr *)buf;
 460                 buf += sizeof(*ip6h);
 461                 tcph = (struct tcphdr *)buf;
 462                 buf += sizeof(*tcph);
 463
 464                 ether_addr_copy(ethh->h_dest, cm_node->rem_mac);
 465                 ether_addr_copy(ethh->h_source, cm_node->loc_mac);
 466                 if (cm_node->vlan_id <= VLAN_VID_MASK) {
 467                         ((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q);
 468                         vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) | cm_node->vlan_id;
 469                         ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(vtag);
 470                         ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IPV6);
 471                 } else {
 472                         ethh->h_proto = htons(ETH_P_IPV6);
 473                 }
 474                 ip6h->version = 6;
 475                 ip6h->priority = cm_node->tos >> 4;
 476                 ip6h->flow_lbl[0] = cm_node->tos << 4;
 477                 ip6h->flow_lbl[1] = 0;
 478                 ip6h->flow_lbl[2] = 0;
 479                 ip6h->payload_len = htons(packetsize - sizeof(*ip6h));
 480                 ip6h->nexthdr = 6;
 481                 ip6h->hop_limit = 128;
 482                 i40iw_copy_ip_htonl(ip6h->saddr.in6_u.u6_addr32,
 483                                     cm_node->loc_addr);
 484                 i40iw_copy_ip_htonl(ip6h->daddr.in6_u.u6_addr32,
 485                                     cm_node->rem_addr);
 486         }
 487
 488         tcph->source = htons(cm_node->loc_port);
 489         tcph->dest = htons(cm_node->rem_port);
 490
 491         tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
 492
 493         if (flags & SET_ACK) {
 494                 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
 495                 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
 496                 tcph->ack = 1;
 497         } else {
 498                 tcph->ack_seq = 0;
 499         }
 500
 501         if (flags & SET_SYN) {
 502                 cm_node->tcp_cntxt.loc_seq_num++;
 503                 tcph->syn = 1;
 504         } else {
 505                 cm_node->tcp_cntxt.loc_seq_num += hdr_len + pd_len;
 506         }
 507
 508         if (flags & SET_FIN) {
 509                 cm_node->tcp_cntxt.loc_seq_num++;
 510                 tcph->fin = 1;
 511         }
 512
 513         if (flags & SET_RST)
 514                 tcph->rst = 1;
 515
 516         tcph->doff = (u16)((sizeof(*tcph) + opts_len + 3) >> 2);
 517         sqbuf->tcphlen = tcph->doff << 2;
 518         tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
 519         tcph->urg_ptr = 0;
 520
 521         if (opts_len) {
 522                 memcpy(buf, options->addr, opts_len);
 523                 buf += opts_len;
 524         }
 525
 526         if (hdr_len) {
 527                 memcpy(buf, hdr->addr, hdr_len);
 528                 buf += hdr_len;
 529         }
 530
 531         if (pdata && pdata->addr)
 532                 memcpy(buf, pdata->addr, pdata->size);
 533
 534         atomic_set(&sqbuf->refcount, 1);
 535
 536         return sqbuf;
 537 }
 538
 539 /**
 540  * i40iw_send_reset - Send RST packet
 541  * @cm_node: connection's node
 542  */
 543 int i40iw_send_reset(struct i40iw_cm_node *cm_node)
 544 {
 545         struct i40iw_puda_buf *sqbuf;
 546         int flags = SET_RST | SET_ACK;
 547
 548         sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, flags);
 549         if (!sqbuf) {
 550                 i40iw_pr_err("no sqbuf\n");
 551                 return -1;
 552         }
 553
 554         return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 0, 1);
 555 }
 556
 557 /**
 558  * i40iw_active_open_err - send event for active side cm error
 559  * @cm_node: connection's node
 560  * @reset: Flag to send reset or not
 561  */
 562 static void i40iw_active_open_err(struct i40iw_cm_node *cm_node, bool reset)
 563 {
 564         i40iw_cleanup_retrans_entry(cm_node);
 565         cm_node->cm_core->stats_connect_errs++;
 566         if (reset) {
 567                 i40iw_debug(cm_node->dev,
 568                             I40IW_DEBUG_CM,
 569                             "%s cm_node=%p state=%d\n",
 570                             __func__,
 571                             cm_node,
 572                             cm_node->state);
 573                 atomic_inc(&cm_node->ref_count);
 574                 i40iw_send_reset(cm_node);
 575         }
 576
 577         cm_node->state = I40IW_CM_STATE_CLOSED;
 578         i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
 579 }
 580
 581 /**
 582  * i40iw_passive_open_err - handle passive side cm error
 583  * @cm_node: connection's node
 584  * @reset: send reset or just free cm_node
 585  */
 586 static void i40iw_passive_open_err(struct i40iw_cm_node *cm_node, bool reset)
 587 {
 588         i40iw_cleanup_retrans_entry(cm_node);
 589         cm_node->cm_core->stats_passive_errs++;
 590         cm_node->state = I40IW_CM_STATE_CLOSED;
 591         i40iw_debug(cm_node->dev,
 592                     I40IW_DEBUG_CM,
 593                     "%s cm_node=%p state =%d\n",
 594                     __func__,
 595                     cm_node,
 596                     cm_node->state);
 597         if (reset)
 598                 i40iw_send_reset(cm_node);
 599         else
 600                 i40iw_rem_ref_cm_node(cm_node);
 601 }
 602
 603 /**
 604  * i40iw_event_connect_error - to create connect error event
 605  * @event: cm information for connect event
 606  */
 607 static void i40iw_event_connect_error(struct i40iw_cm_event *event)
 608 {
 609         struct i40iw_qp *iwqp;
 610         struct iw_cm_id *cm_id;
 611
 612         cm_id = event->cm_node->cm_id;
 613         if (!cm_id)
 614                 return;
 615
 616         iwqp = cm_id->provider_data;
 617
 618         if (!iwqp || !iwqp->iwdev)
 619                 return;
 620
 621         iwqp->cm_id = NULL;
 622         cm_id->provider_data = NULL;
 623         i40iw_send_cm_event(event->cm_node, cm_id,
 624                             IW_CM_EVENT_CONNECT_REPLY,
 625                             -ECONNRESET);
 626         cm_id->rem_ref(cm_id);
 627         i40iw_rem_ref_cm_node(event->cm_node);
 628 }
 629
 630 /**
 631  * i40iw_process_options
 632  * @cm_node: connection's node
 633  * @optionsloc: point to start of options
 634  * @optionsize: size of all options
 635  * @syn_packet: flag if syn packet
 636  */
 637 static int i40iw_process_options(struct i40iw_cm_node *cm_node,
 638                                  u8 *optionsloc,
 639                                  u32 optionsize,
 640                                  u32 syn_packet)
 641 {
 642         u32 tmp;
 643         u32 offset = 0;
 644         union all_known_options *all_options;
 645         char got_mss_option = 0;
 646
 647         while (offset < optionsize) {
 648                 all_options = (union all_known_options *)(optionsloc + offset);
 649                 switch (all_options->as_base.optionnum) {
 650                 case OPTION_NUMBER_END:
 651                         offset = optionsize;
 652                         break;
 653                 case OPTION_NUMBER_NONE:
 654                         offset += 1;
 655                         continue;
 656                 case OPTION_NUMBER_MSS:
 657                         i40iw_debug(cm_node->dev,
 658                                     I40IW_DEBUG_CM,
 659                                     "%s: MSS Length: %d Offset: %d Size: %d\n",
 660                                     __func__,
 661                                     all_options->as_mss.length,
 662                                     offset,
 663                                     optionsize);
 664                         got_mss_option = 1;
 665                         if (all_options->as_mss.length != 4)
 666                                 return -1;
 667                         tmp = ntohs(all_options->as_mss.mss);
 668                         if (tmp > 0 && tmp < cm_node->tcp_cntxt.mss)
 669                                 cm_node->tcp_cntxt.mss = tmp;
 670                         break;
 671                 case OPTION_NUMBER_WINDOW_SCALE:
 672                         cm_node->tcp_cntxt.snd_wscale =
 673                             all_options->as_windowscale.shiftcount;
 674                         break;
 675                 default:
 676                         i40iw_debug(cm_node->dev,
 677                                     I40IW_DEBUG_CM,
 678                                     "TCP Option not understood: %x\n",
 679                                     all_options->as_base.optionnum);
 680                         break;
 681                 }
 682                 offset += all_options->as_base.length;
 683         }
 684         if (!got_mss_option && syn_packet)
 685                 cm_node->tcp_cntxt.mss = I40IW_CM_DEFAULT_MSS;
 686         return 0;
 687 }
 688
 689 /**
 690  * i40iw_handle_tcp_options -
 691  * @cm_node: connection's node
 692  * @tcph: pointer tcp header
 693  * @optionsize: size of options rcvd
 694  * @passive: active or passive flag
 695  */
 696 static int i40iw_handle_tcp_options(struct i40iw_cm_node *cm_node,
 697                                     struct tcphdr *tcph,
 698                                     int optionsize,
 699                                     int passive)
 700 {
 701         u8 *optionsloc = (u8 *)&tcph[1];
 702
 703         if (optionsize) {
 704                 if (i40iw_process_options(cm_node,
 705                                           optionsloc,
 706                                           optionsize,
 707                                           (u32)tcph->syn)) {
 708                         i40iw_debug(cm_node->dev,
 709                                     I40IW_DEBUG_CM,
 710                                     "%s: Node %p, Sending RESET\n",
 711                                     __func__,
 712                                     cm_node);
 713                         if (passive)
 714                                 i40iw_passive_open_err(cm_node, true);
 715                         else
 716                                 i40iw_active_open_err(cm_node, true);
 717                         return -1;
 718                 }
 719         }
 720
 721         cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
 722             cm_node->tcp_cntxt.snd_wscale;
 723
 724         if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
 725                 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
 726         return 0;
 727 }
 728
 729 /**
 730  * i40iw_build_mpa_v1 - build a MPA V1 frame
 731  * @cm_node: connection's node
 732  * @mpa_key: to do read0 or write0
 733  */
 734 static void i40iw_build_mpa_v1(struct i40iw_cm_node *cm_node,
 735                                void *start_addr,
 736                                u8 mpa_key)
 737 {
 738         struct ietf_mpa_v1 *mpa_frame = (struct ietf_mpa_v1 *)start_addr;
 739
 740         switch (mpa_key) {
 741         case MPA_KEY_REQUEST:
 742                 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
 743                 break;
 744         case MPA_KEY_REPLY:
 745                 memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
 746                 break;
 747         default:
 748                 break;
 749         }
 750         mpa_frame->flags = IETF_MPA_FLAGS_CRC;
 751         mpa_frame->rev = cm_node->mpa_frame_rev;
 752         mpa_frame->priv_data_len = htons(cm_node->pdata.size);
 753 }
 754
 755 /**
 756  * i40iw_build_mpa_v2 - build a MPA V2 frame
 757  * @cm_node: connection's node
 758  * @start_addr: buffer start address
 759  * @mpa_key: to do read0 or write0
 760  */
 761 static void i40iw_build_mpa_v2(struct i40iw_cm_node *cm_node,
 762                                void *start_addr,
 763                                u8 mpa_key)
 764 {
 765         struct ietf_mpa_v2 *mpa_frame = (struct ietf_mpa_v2 *)start_addr;
 766         struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg;
 767         u16 ctrl_ird, ctrl_ord;
 768
 769         /* initialize the upper 5 bytes of the frame */
 770         i40iw_build_mpa_v1(cm_node, start_addr, mpa_key);
 771         mpa_frame->flags |= IETF_MPA_V2_FLAG;
 772         mpa_frame->priv_data_len += htons(IETF_RTR_MSG_SIZE);
 773
 774         /* initialize RTR msg */
 775         if (cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) {
 776                 ctrl_ird = IETF_NO_IRD_ORD;
 777                 ctrl_ord = IETF_NO_IRD_ORD;
 778         } else {
 779                 ctrl_ird = (cm_node->ird_size > IETF_NO_IRD_ORD) ?
 780                         IETF_NO_IRD_ORD : cm_node->ird_size;
 781                 ctrl_ord = (cm_node->ord_size > IETF_NO_IRD_ORD) ?
 782                         IETF_NO_IRD_ORD : cm_node->ord_size;
 783         }
 784
 785         ctrl_ird |= IETF_PEER_TO_PEER;
 786
 787         switch (mpa_key) {
 788         case MPA_KEY_REQUEST:
 789                 ctrl_ord |= IETF_RDMA0_WRITE;
 790                 ctrl_ord |= IETF_RDMA0_READ;
 791                 break;
 792         case MPA_KEY_REPLY:
 793                 switch (cm_node->send_rdma0_op) {
 794                 case SEND_RDMA_WRITE_ZERO:
 795                         ctrl_ord |= IETF_RDMA0_WRITE;
 796                         break;
 797                 case SEND_RDMA_READ_ZERO:
 798                         ctrl_ord |= IETF_RDMA0_READ;
 799                         break;
 800                 }
 801                 break;
 802         default:
 803                 break;
 804         }
 805         rtr_msg->ctrl_ird = htons(ctrl_ird);
 806         rtr_msg->ctrl_ord = htons(ctrl_ord);
 807 }
 808
 809 /**
 810  * i40iw_cm_build_mpa_frame - build mpa frame for mpa version 1 or version 2
 811  * @cm_node: connection's node
 812  * @mpa: mpa: data buffer
 813  * @mpa_key: to do read0 or write0
 814  */
 815 static int i40iw_cm_build_mpa_frame(struct i40iw_cm_node *cm_node,
 816                                     struct i40iw_kmem_info *mpa,
 817                                     u8 mpa_key)
 818 {
 819         int hdr_len = 0;
 820
 821         switch (cm_node->mpa_frame_rev) {
 822         case IETF_MPA_V1:
 823                 hdr_len = sizeof(struct ietf_mpa_v1);
 824                 i40iw_build_mpa_v1(cm_node, mpa->addr, mpa_key);
 825                 break;
 826         case IETF_MPA_V2:
 827                 hdr_len = sizeof(struct ietf_mpa_v2);
 828                 i40iw_build_mpa_v2(cm_node, mpa->addr, mpa_key);
 829                 break;
 830         default:
 831                 break;
 832         }
 833
 834         return hdr_len;
 835 }
 836
 837 /**
 838  * i40iw_send_mpa_request - active node send mpa request to passive node
 839  * @cm_node: connection's node
 840  */
 841 static int i40iw_send_mpa_request(struct i40iw_cm_node *cm_node)
 842 {
 843         struct i40iw_puda_buf *sqbuf;
 844
 845         if (!cm_node) {
 846                 i40iw_pr_err("cm_node == NULL\n");
 847                 return -1;
 848         }
 849
 850         cm_node->mpa_hdr.addr = &cm_node->mpa_frame;
 851         cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node,
 852                                                          &cm_node->mpa_hdr,
 853                                                          MPA_KEY_REQUEST);
 854         if (!cm_node->mpa_hdr.size) {
 855                 i40iw_pr_err("mpa size = %d\n", cm_node->mpa_hdr.size);
 856                 return -1;
 857         }
 858
 859         sqbuf = i40iw_form_cm_frame(cm_node,
 860                                     NULL,
 861                                     &cm_node->mpa_hdr,
 862                                     &cm_node->pdata,
 863                                     SET_ACK);
 864         if (!sqbuf) {
 865                 i40iw_pr_err("sq_buf == NULL\n");
 866                 return -1;
 867         }
 868         return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
 869 }
 870
 871 /**
 872  * i40iw_send_mpa_reject -
 873  * @cm_node: connection's node
 874  * @pdata: reject data for connection
 875  * @plen: length of reject data
 876  */
 877 static int i40iw_send_mpa_reject(struct i40iw_cm_node *cm_node,
 878                                  const void *pdata,
 879                                  u8 plen)
 880 {
 881         struct i40iw_puda_buf *sqbuf;
 882         struct i40iw_kmem_info priv_info;
 883
 884         cm_node->mpa_hdr.addr = &cm_node->mpa_frame;
 885         cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node,
 886                                                          &cm_node->mpa_hdr,
 887                                                          MPA_KEY_REPLY);
 888
 889         cm_node->mpa_frame.flags |= IETF_MPA_FLAGS_REJECT;
 890         priv_info.addr = (void *)pdata;
 891         priv_info.size = plen;
 892
 893         sqbuf = i40iw_form_cm_frame(cm_node,
 894                                     NULL,
 895                                     &cm_node->mpa_hdr,
 896                                     &priv_info,
 897                                     SET_ACK | SET_FIN);
 898         if (!sqbuf) {
 899                 i40iw_pr_err("no sqbuf\n");
 900                 return -ENOMEM;
 901         }
 902         cm_node->state = I40IW_CM_STATE_FIN_WAIT1;
 903         return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
 904 }
 905
 906 /**
 907  * recv_mpa - process an IETF MPA frame
 908  * @cm_node: connection's node
 909  * @buffer: Data pointer
 910  * @type: to return accept or reject
 911  * @len: Len of mpa buffer
 912  */
 913 static int i40iw_parse_mpa(struct i40iw_cm_node *cm_node, u8 *buffer, u32 *type, u32 len)
 914 {
 915         struct ietf_mpa_v1 *mpa_frame;
 916         struct ietf_mpa_v2 *mpa_v2_frame;
 917         struct ietf_rtr_msg *rtr_msg;
 918         int mpa_hdr_len;
 919         int priv_data_len;
 920
 921         *type = I40IW_MPA_REQUEST_ACCEPT;
 922
 923         if (len < sizeof(struct ietf_mpa_v1)) {
 924                 i40iw_pr_err("ietf buffer small (%x)\n", len);
 925                 return -1;
 926         }
 927
 928         mpa_frame = (struct ietf_mpa_v1 *)buffer;
 929         mpa_hdr_len = sizeof(struct ietf_mpa_v1);
 930         priv_data_len = ntohs(mpa_frame->priv_data_len);
 931
 932         if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) {
 933                 i40iw_pr_err("large pri_data %d\n", priv_data_len);
 934                 return -1;
 935         }
 936         if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) {
 937                 i40iw_pr_err("unsupported mpa rev = %d\n", mpa_frame->rev);
 938                 return -1;
 939         }
 940         if (mpa_frame->rev > cm_node->mpa_frame_rev) {
 941                 i40iw_pr_err("rev %d\n", mpa_frame->rev);
 942                 return -1;
 943         }
 944         cm_node->mpa_frame_rev = mpa_frame->rev;
 945
 946         if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) {
 947                 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) {
 948                         i40iw_pr_err("Unexpected MPA Key received\n");
 949                         return -1;
 950                 }
 951         } else {
 952                 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) {
 953                         i40iw_pr_err("Unexpected MPA Key received\n");
 954                         return -1;
 955                 }
 956         }
 957
 958         if (priv_data_len + mpa_hdr_len > len) {
 959                 i40iw_pr_err("ietf buffer len(%x + %x != %x)\n",
 960                              priv_data_len, mpa_hdr_len, len);
 961                 return -1;
 962         }
 963         if (len > MAX_CM_BUFFER) {
 964                 i40iw_pr_err("ietf buffer large len = %d\n", len);
 965                 return -1;
 966         }
 967
 968         switch (mpa_frame->rev) {
 969         case IETF_MPA_V2:{
 970                         u16 ird_size;
 971                         u16 ord_size;
 972                         u16 ctrl_ord;
 973                         u16 ctrl_ird;
 974
 975                         mpa_v2_frame = (struct ietf_mpa_v2 *)buffer;
 976                         mpa_hdr_len += IETF_RTR_MSG_SIZE;
 977                         rtr_msg = &mpa_v2_frame->rtr_msg;
 978
 979                         /* parse rtr message */
 980                         ctrl_ord = ntohs(rtr_msg->ctrl_ord);
 981                         ctrl_ird = ntohs(rtr_msg->ctrl_ird);
 982                         ird_size = ctrl_ird & IETF_NO_IRD_ORD;
 983                         ord_size = ctrl_ord & IETF_NO_IRD_ORD;
 984
 985                         if (!(ctrl_ird & IETF_PEER_TO_PEER))
 986                                 return -1;
 987
 988                         if (ird_size == IETF_NO_IRD_ORD || ord_size == IETF_NO_IRD_ORD) {
 989                                 cm_node->mpav2_ird_ord = IETF_NO_IRD_ORD;
 990                                 goto negotiate_done;
 991                         }
 992
 993                         if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) {
 994                                 /* responder */
 995                                 if (!ord_size && (ctrl_ord & IETF_RDMA0_READ))
 996                                         cm_node->ird_size = 1;
 997                                 if (cm_node->ord_size > ird_size)
 998                                         cm_node->ord_size = ird_size;
 999                         } else {
1000                                 /* initiator */
1001                                 if (!ird_size && (ctrl_ord & IETF_RDMA0_READ))
1002                                         return -1;
1003                                 if (cm_node->ord_size > ird_size)
1004                                         cm_node->ord_size = ird_size;
1005
1006                                 if (cm_node->ird_size < ord_size)
1007                                         /* no resources available */
1008                                         return -1;
1009                         }
1010
1011 negotiate_done:
1012                         if (ctrl_ord & IETF_RDMA0_READ)
1013                                 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
1014                         else if (ctrl_ord & IETF_RDMA0_WRITE)
1015                                 cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO;
1016                         else    /* Not supported RDMA0 operation */
1017                                 return -1;
1018                         i40iw_debug(cm_node->dev, I40IW_DEBUG_CM,
1019                                     "MPAV2: Negotiated ORD: %d, IRD: %d\n",
1020                                     cm_node->ord_size, cm_node->ird_size);
1021                         break;
1022                 }
1023                 break;
1024         case IETF_MPA_V1:
1025         default:
1026                 break;
1027         }
1028
1029         memcpy(cm_node->pdata_buf, buffer + mpa_hdr_len, priv_data_len);
1030         cm_node->pdata.size = priv_data_len;
1031
1032         if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT)
1033                 *type = I40IW_MPA_REQUEST_REJECT;
1034
1035         if (mpa_frame->flags & IETF_MPA_FLAGS_MARKERS)
1036                 cm_node->snd_mark_en = true;
1037
1038         return 0;
1039 }
1040
1041 /**
1042  * i40iw_schedule_cm_timer
1043  * @@cm_node: connection's node
1044  * @sqbuf: buffer to send
1045  * @type: if it is send or close
1046  * @send_retrans: if rexmits to be done
1047  * @close_when_complete: is cm_node to be removed
1048  *
1049  * note - cm_node needs to be protected before calling this. Encase in:
1050  *              i40iw_rem_ref_cm_node(cm_core, cm_node);
1051  *              i40iw_schedule_cm_timer(...)
1052  *              atomic_inc(&cm_node->ref_count);
1053  */
1054 int i40iw_schedule_cm_timer(struct i40iw_cm_node *cm_node,
1055                             struct i40iw_puda_buf *sqbuf,
1056                             enum i40iw_timer_type type,
1057                             int send_retrans,
1058                             int close_when_complete)
1059 {
1060         struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi;
1061         struct i40iw_cm_core *cm_core = cm_node->cm_core;
1062         struct i40iw_timer_entry *new_send;
1063         int ret = 0;
1064         u32 was_timer_set;
1065         unsigned long flags;
1066
1067         new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
1068         if (!new_send) {
1069                 if (type != I40IW_TIMER_TYPE_CLOSE)
1070                         i40iw_free_sqbuf(vsi, (void *)sqbuf);
1071                 return -ENOMEM;
1072         }
1073         new_send->retrycount = I40IW_DEFAULT_RETRYS;
1074         new_send->retranscount = I40IW_DEFAULT_RETRANS;
1075         new_send->sqbuf = sqbuf;
1076         new_send->timetosend = jiffies;
1077         new_send->type = type;
1078         new_send->send_retrans = send_retrans;
1079         new_send->close_when_complete = close_when_complete;
1080
1081         if (type == I40IW_TIMER_TYPE_CLOSE) {
1082                 new_send->timetosend += (HZ / 10);
1083                 if (cm_node->close_entry) {
1084                         kfree(new_send);
1085                         i40iw_pr_err("already close entry\n");
1086                         return -EINVAL;
1087                 }
1088                 cm_node->close_entry = new_send;
1089         }
1090
1091         if (type == I40IW_TIMER_TYPE_SEND) {
1092                 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1093                 cm_node->send_entry = new_send;
1094                 atomic_inc(&cm_node->ref_count);
1095                 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1096                 new_send->timetosend = jiffies + I40IW_RETRY_TIMEOUT;
1097
1098                 atomic_inc(&sqbuf->refcount);
1099                 i40iw_puda_send_buf(vsi->ilq, sqbuf);
1100                 if (!send_retrans) {
1101                         i40iw_cleanup_retrans_entry(cm_node);
1102                         if (close_when_complete)
1103                                 i40iw_rem_ref_cm_node(cm_node);
1104                         return ret;
1105                 }
1106         }
1107
1108         spin_lock_irqsave(&cm_core->ht_lock, flags);
1109         was_timer_set = timer_pending(&cm_core->tcp_timer);
1110
1111         if (!was_timer_set) {
1112                 cm_core->tcp_timer.expires = new_send->timetosend;
1113                 add_timer(&cm_core->tcp_timer);
1114         }
1115         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1116
1117         return ret;
1118 }
1119
1120 /**
1121  * i40iw_retrans_expired - Could not rexmit the packet
1122  * @cm_node: connection's node
1123  */
1124 static void i40iw_retrans_expired(struct i40iw_cm_node *cm_node)
1125 {
1126         struct iw_cm_id *cm_id = cm_node->cm_id;
1127         enum i40iw_cm_node_state state = cm_node->state;
1128
1129         cm_node->state = I40IW_CM_STATE_CLOSED;
1130         switch (state) {
1131         case I40IW_CM_STATE_SYN_RCVD:
1132         case I40IW_CM_STATE_CLOSING:
1133                 i40iw_rem_ref_cm_node(cm_node);
1134                 break;
1135         case I40IW_CM_STATE_FIN_WAIT1:
1136         case I40IW_CM_STATE_LAST_ACK:
1137                 if (cm_node->cm_id)
1138                         cm_id->rem_ref(cm_id);
1139                 i40iw_send_reset(cm_node);
1140                 break;
1141         default:
1142                 atomic_inc(&cm_node->ref_count);
1143                 i40iw_send_reset(cm_node);
1144                 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
1145                 break;
1146         }
1147 }
1148
1149 /**
1150  * i40iw_handle_close_entry - for handling retry/timeouts
1151  * @cm_node: connection's node
1152  * @rem_node: flag for remove cm_node
1153  */
1154 static void i40iw_handle_close_entry(struct i40iw_cm_node *cm_node, u32 rem_node)
1155 {
1156         struct i40iw_timer_entry *close_entry = cm_node->close_entry;
1157         struct iw_cm_id *cm_id = cm_node->cm_id;
1158         struct i40iw_qp *iwqp;
1159         unsigned long flags;
1160
1161         if (!close_entry)
1162                 return;
1163         iwqp = (struct i40iw_qp *)close_entry->sqbuf;
1164         if (iwqp) {
1165                 spin_lock_irqsave(&iwqp->lock, flags);
1166                 if (iwqp->cm_id) {
1167                         iwqp->hw_tcp_state = I40IW_TCP_STATE_CLOSED;
1168                         iwqp->hw_iwarp_state = I40IW_QP_STATE_ERROR;
1169                         iwqp->last_aeq = I40IW_AE_RESET_SENT;
1170                         iwqp->ibqp_state = IB_QPS_ERR;
1171                         spin_unlock_irqrestore(&iwqp->lock, flags);
1172                         i40iw_cm_disconn(iwqp);
1173                 } else {
1174                         spin_unlock_irqrestore(&iwqp->lock, flags);
1175                 }
1176         } else if (rem_node) {
1177                 /* TIME_WAIT state */
1178                 i40iw_rem_ref_cm_node(cm_node);
1179         }
1180         if (cm_id)
1181                 cm_id->rem_ref(cm_id);
1182         kfree(close_entry);
1183         cm_node->close_entry = NULL;
1184 }
1185
1186 /**
1187  * i40iw_build_timer_list - Add cm_nodes to timer list
1188  * @timer_list: ptr to timer list
1189  * @hte: ptr to accelerated or non-accelerated list
1190  */
1191 static void i40iw_build_timer_list(struct list_head *timer_list,
1192                                    struct list_head *hte)
1193 {
1194         struct i40iw_cm_node *cm_node;
1195         struct list_head *list_core_temp, *list_node;
1196
1197         list_for_each_safe(list_node, list_core_temp, hte) {
1198                 cm_node = container_of(list_node, struct i40iw_cm_node, list);
1199                 if (cm_node->close_entry || cm_node->send_entry) {
1200                         atomic_inc(&cm_node->ref_count);
1201                         list_add(&cm_node->timer_entry, timer_list);
1202                 }
1203         }
1204 }
1205
1206 /**
1207  * i40iw_cm_timer_tick - system's timer expired callback
1208  * @pass: Pointing to cm_core
1209  */
1210 static void i40iw_cm_timer_tick(struct timer_list *t)
1211 {
1212         unsigned long nexttimeout = jiffies + I40IW_LONG_TIME;
1213         struct i40iw_cm_node *cm_node;
1214         struct i40iw_timer_entry *send_entry, *close_entry;
1215         struct list_head *list_core_temp;
1216         struct i40iw_sc_vsi *vsi;
1217         struct list_head *list_node;
1218         struct i40iw_cm_core *cm_core = from_timer(cm_core, t, tcp_timer);
1219         u32 settimer = 0;
1220         unsigned long timetosend;
1221         unsigned long flags;
1222
1223         struct list_head timer_list;
1224
1225         INIT_LIST_HEAD(&timer_list);
1226
1227         spin_lock_irqsave(&cm_core->ht_lock, flags);
1228         i40iw_build_timer_list(&timer_list, &cm_core->non_accelerated_list);
1229         i40iw_build_timer_list(&timer_list, &cm_core->accelerated_list);
1230         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1231
1232         list_for_each_safe(list_node, list_core_temp, &timer_list) {
1233                 cm_node = container_of(list_node,
1234                                        struct i40iw_cm_node,
1235                                        timer_entry);
1236                 close_entry = cm_node->close_entry;
1237
1238                 if (close_entry) {
1239                         if (time_after(close_entry->timetosend, jiffies)) {
1240                                 if (nexttimeout > close_entry->timetosend ||
1241                                     !settimer) {
1242                                         nexttimeout = close_entry->timetosend;
1243                                         settimer = 1;
1244                                 }
1245                         } else {
1246                                 i40iw_handle_close_entry(cm_node, 1);
1247                         }
1248                 }
1249
1250                 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1251
1252                 send_entry = cm_node->send_entry;
1253                 if (!send_entry)
1254                         goto done;
1255                 if (time_after(send_entry->timetosend, jiffies)) {
1256                         if (cm_node->state != I40IW_CM_STATE_OFFLOADED) {
1257                                 if ((nexttimeout > send_entry->timetosend) ||
1258                                     !settimer) {
1259                                         nexttimeout = send_entry->timetosend;
1260                                         settimer = 1;
1261                                 }
1262                         } else {
1263                                 i40iw_free_retrans_entry(cm_node);
1264                         }
1265                         goto done;
1266                 }
1267
1268                 if ((cm_node->state == I40IW_CM_STATE_OFFLOADED) ||
1269                     (cm_node->state == I40IW_CM_STATE_CLOSED)) {
1270                         i40iw_free_retrans_entry(cm_node);
1271                         goto done;
1272                 }
1273
1274                 if (!send_entry->retranscount || !send_entry->retrycount) {
1275                         i40iw_free_retrans_entry(cm_node);
1276
1277                         spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1278                         i40iw_retrans_expired(cm_node);
1279                         cm_node->state = I40IW_CM_STATE_CLOSED;
1280                         spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1281                         goto done;
1282                 }
1283                 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1284
1285                 vsi = &cm_node->iwdev->vsi;
1286
1287                 if (!cm_node->ack_rcvd) {
1288                         atomic_inc(&send_entry->sqbuf->refcount);
1289                         i40iw_puda_send_buf(vsi->ilq, send_entry->sqbuf);
1290                         cm_node->cm_core->stats_pkt_retrans++;
1291                 }
1292                 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1293                 if (send_entry->send_retrans) {
1294                         send_entry->retranscount--;
1295                         timetosend = (I40IW_RETRY_TIMEOUT <<
1296                                       (I40IW_DEFAULT_RETRANS -
1297                                        send_entry->retranscount));
1298
1299                         send_entry->timetosend = jiffies +
1300                             min(timetosend, I40IW_MAX_TIMEOUT);
1301                         if (nexttimeout > send_entry->timetosend || !settimer) {
1302                                 nexttimeout = send_entry->timetosend;
1303                                 settimer = 1;
1304                         }
1305                 } else {
1306                         int close_when_complete;
1307
1308                         close_when_complete = send_entry->close_when_complete;
1309                         i40iw_debug(cm_node->dev,
1310                                     I40IW_DEBUG_CM,
1311                                     "cm_node=%p state=%d\n",
1312                                     cm_node,
1313                                     cm_node->state);
1314                         i40iw_free_retrans_entry(cm_node);
1315                         if (close_when_complete)
1316                                 i40iw_rem_ref_cm_node(cm_node);
1317                 }
1318 done:
1319                 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1320                 i40iw_rem_ref_cm_node(cm_node);
1321         }
1322
1323         if (settimer) {
1324                 spin_lock_irqsave(&cm_core->ht_lock, flags);
1325                 if (!timer_pending(&cm_core->tcp_timer)) {
1326                         cm_core->tcp_timer.expires = nexttimeout;
1327                         add_timer(&cm_core->tcp_timer);
1328                 }
1329                 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1330         }
1331 }
1332
1333 /**
1334  * i40iw_send_syn - send SYN packet
1335  * @cm_node: connection's node
1336  * @sendack: flag to set ACK bit or not
1337  */
1338 int i40iw_send_syn(struct i40iw_cm_node *cm_node, u32 sendack)
1339 {
1340         struct i40iw_puda_buf *sqbuf;
1341         int flags = SET_SYN;
1342         char optionsbuffer[sizeof(struct option_mss) +
1343                            sizeof(struct option_windowscale) +
1344                            sizeof(struct option_base) + TCP_OPTIONS_PADDING];
1345         struct i40iw_kmem_info opts;
1346
1347         int optionssize = 0;
1348         /* Sending MSS option */
1349         union all_known_options *options;
1350
1351         opts.addr = optionsbuffer;
1352         if (!cm_node) {
1353                 i40iw_pr_err("no cm_node\n");
1354                 return -EINVAL;
1355         }
1356
1357         options = (union all_known_options *)&optionsbuffer[optionssize];
1358         options->as_mss.optionnum = OPTION_NUMBER_MSS;
1359         options->as_mss.length = sizeof(struct option_mss);
1360         options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
1361         optionssize += sizeof(struct option_mss);
1362
1363         options = (union all_known_options *)&optionsbuffer[optionssize];
1364         options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
1365         options->as_windowscale.length = sizeof(struct option_windowscale);
1366         options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
1367         optionssize += sizeof(struct option_windowscale);
1368         options = (union all_known_options *)&optionsbuffer[optionssize];
1369         options->as_end = OPTION_NUMBER_END;
1370         optionssize += 1;
1371
1372         if (sendack)
1373                 flags |= SET_ACK;
1374
1375         opts.size = optionssize;
1376
1377         sqbuf = i40iw_form_cm_frame(cm_node, &opts, NULL, NULL, flags);
1378         if (!sqbuf) {
1379                 i40iw_pr_err("no sqbuf\n");
1380                 return -1;
1381         }
1382         return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
1383 }
1384
1385 /**
1386  * i40iw_send_ack - Send ACK packet
1387  * @cm_node: connection's node
1388  */
1389 static void i40iw_send_ack(struct i40iw_cm_node *cm_node)
1390 {
1391         struct i40iw_puda_buf *sqbuf;
1392         struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi;
1393
1394         sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK);
1395         if (sqbuf)
1396                 i40iw_puda_send_buf(vsi->ilq, sqbuf);
1397         else
1398                 i40iw_pr_err("no sqbuf\n");
1399 }
1400
1401 /**
1402  * i40iw_send_fin - Send FIN pkt
1403  * @cm_node: connection's node
1404  */
1405 static int i40iw_send_fin(struct i40iw_cm_node *cm_node)
1406 {
1407         struct i40iw_puda_buf *sqbuf;
1408
1409         sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK | SET_FIN);
1410         if (!sqbuf) {
1411                 i40iw_pr_err("no sqbuf\n");
1412                 return -1;
1413         }
1414         return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
1415 }
1416
1417 /**
1418  * i40iw_find_node - find a cm node that matches the reference cm node
1419  * @cm_core: cm's core
1420  * @rem_port: remote tcp port num
1421  * @rem_addr: remote ip addr
1422  * @loc_port: local tcp port num
1423  * @loc_addr: loc ip addr
1424  * @add_refcnt: flag to increment refcount of cm_node
1425  * @accelerated_list: flag for accelerated vs non-accelerated list to search
1426  */
1427 struct i40iw_cm_node *i40iw_find_node(struct i40iw_cm_core *cm_core,
1428                                       u16 rem_port,
1429                                       u32 *rem_addr,
1430                                       u16 loc_port,
1431                                       u32 *loc_addr,
1432                                       bool add_refcnt,
1433                                       bool accelerated_list)
1434 {
1435         struct list_head *hte;
1436         struct i40iw_cm_node *cm_node;
1437         unsigned long flags;
1438
1439         hte = accelerated_list ?
1440               &cm_core->accelerated_list : &cm_core->non_accelerated_list;
1441
1442         /* walk list and find cm_node associated with this session ID */
1443         spin_lock_irqsave(&cm_core->ht_lock, flags);
1444         list_for_each_entry(cm_node, hte, list) {
1445                 if (!memcmp(cm_node->loc_addr, loc_addr, sizeof(cm_node->loc_addr)) &&
1446                     (cm_node->loc_port == loc_port) &&
1447                     !memcmp(cm_node->rem_addr, rem_addr, sizeof(cm_node->rem_addr)) &&
1448                     (cm_node->rem_port == rem_port)) {
1449                         if (add_refcnt)
1450                                 atomic_inc(&cm_node->ref_count);
1451                         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1452                         return cm_node;
1453                 }
1454         }
1455         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1456
1457         /* no owner node */
1458         return NULL;
1459 }
1460
1461 /**
1462  * i40iw_find_listener - find a cm node listening on this addr-port pair
1463  * @cm_core: cm's core
1464  * @dst_port: listener tcp port num
1465  * @dst_addr: listener ip addr
1466  * @listener_state: state to match with listen node's
1467  */
1468 static struct i40iw_cm_listener *i40iw_find_listener(
1469                                                      struct i40iw_cm_core *cm_core,
1470                                                      u32 *dst_addr,
1471                                                      u16 dst_port,
1472                                                      u16 vlan_id,
1473                                                      enum i40iw_cm_listener_state
1474                                                      listener_state)
1475 {
1476         struct i40iw_cm_listener *listen_node;
1477         static const u32 ip_zero[4] = { 0, 0, 0, 0 };
1478         u32 listen_addr[4];
1479         u16 listen_port;
1480         unsigned long flags;
1481
1482         /* walk list and find cm_node associated with this session ID */
1483         spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1484         list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
1485                 memcpy(listen_addr, listen_node->loc_addr, sizeof(listen_addr));
1486                 listen_port = listen_node->loc_port;
1487                 /* compare node pair, return node handle if a match */
1488                 if ((!memcmp(listen_addr, dst_addr, sizeof(listen_addr)) ||
1489                      !memcmp(listen_addr, ip_zero, sizeof(listen_addr))) &&
1490                      (listen_port == dst_port) &&
1491                      (listener_state & listen_node->listener_state)) {
1492                         atomic_inc(&listen_node->ref_count);
1493                         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1494                         return listen_node;
1495                 }
1496         }
1497         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1498         return NULL;
1499 }
1500
1501 /**
1502  * i40iw_add_hte_node - add a cm node to the hash table
1503  * @cm_core: cm's core
1504  * @cm_node: connection's node
1505  */
1506 static void i40iw_add_hte_node(struct i40iw_cm_core *cm_core,
1507                                struct i40iw_cm_node *cm_node)
1508 {
1509         unsigned long flags;
1510
1511         if (!cm_node || !cm_core) {
1512                 i40iw_pr_err("cm_node or cm_core == NULL\n");
1513                 return;
1514         }
1515
1516         spin_lock_irqsave(&cm_core->ht_lock, flags);
1517         list_add_tail(&cm_node->list, &cm_core->non_accelerated_list);
1518         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1519 }
1520
1521 /**
1522  * i40iw_find_port - find port that matches reference port
1523  * @hte: ptr to accelerated or non-accelerated list
1524  * @accelerated_list: flag for accelerated vs non-accelerated list
1525  */
1526 static bool i40iw_find_port(struct list_head *hte, u16 port)
1527 {
1528         struct i40iw_cm_node *cm_node;
1529
1530         list_for_each_entry(cm_node, hte, list) {
1531                 if (cm_node->loc_port == port)
1532                         return true;
1533         }
1534         return false;
1535 }
1536
1537 /**
1538  * i40iw_port_in_use - determine if port is in use
1539  * @cm_core: cm's core
1540  * @port: port number
1541  */
1542 bool i40iw_port_in_use(struct i40iw_cm_core *cm_core, u16 port)
1543 {
1544         struct i40iw_cm_listener *listen_node;
1545         unsigned long flags;
1546
1547         spin_lock_irqsave(&cm_core->ht_lock, flags);
1548         if (i40iw_find_port(&cm_core->accelerated_list, port) ||
1549             i40iw_find_port(&cm_core->non_accelerated_list, port)) {
1550                 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1551                 return true;
1552         }
1553         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1554
1555         spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1556         list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
1557                 if (listen_node->loc_port == port) {
1558                         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1559                         return true;
1560                 }
1561         }
1562         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1563
1564         return false;
1565 }
1566
1567 /**
1568  * i40iw_del_multiple_qhash - Remove qhash and child listens
1569  * @iwdev: iWarp device
1570  * @cm_info: CM info for parent listen node
1571  * @cm_parent_listen_node: The parent listen node
1572  */
1573 static enum i40iw_status_code i40iw_del_multiple_qhash(
1574                                                        struct i40iw_device *iwdev,
1575                                                        struct i40iw_cm_info *cm_info,
1576                                                        struct i40iw_cm_listener *cm_parent_listen_node)
1577 {
1578         struct i40iw_cm_listener *child_listen_node;
1579         enum i40iw_status_code ret = I40IW_ERR_CONFIG;
1580         struct list_head *pos, *tpos;
1581         unsigned long flags;
1582
1583         spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1584         list_for_each_safe(pos, tpos, &cm_parent_listen_node->child_listen_list) {
1585                 child_listen_node = list_entry(pos, struct i40iw_cm_listener, child_listen_list);
1586                 if (child_listen_node->ipv4)
1587                         i40iw_debug(&iwdev->sc_dev,
1588                                     I40IW_DEBUG_CM,
1589                                     "removing child listen for IP=%pI4, port=%d, vlan=%d\n",
1590                                     child_listen_node->loc_addr,
1591                                     child_listen_node->loc_port,
1592                                     child_listen_node->vlan_id);
1593                 else
1594                         i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM,
1595                                     "removing child listen for IP=%pI6, port=%d, vlan=%d\n",
1596                                     child_listen_node->loc_addr,
1597                                     child_listen_node->loc_port,
1598                                     child_listen_node->vlan_id);
1599                 list_del(pos);
1600                 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1601                        sizeof(cm_info->loc_addr));
1602                 cm_info->vlan_id = child_listen_node->vlan_id;
1603                 if (child_listen_node->qhash_set) {
1604                         ret = i40iw_manage_qhash(iwdev, cm_info,
1605                                                  I40IW_QHASH_TYPE_TCP_SYN,
1606                                                  I40IW_QHASH_MANAGE_TYPE_DELETE,
1607                                                  NULL, false);
1608                         child_listen_node->qhash_set = false;
1609                 } else {
1610                         ret = I40IW_SUCCESS;
1611                 }
1612                 i40iw_debug(&iwdev->sc_dev,
1613                             I40IW_DEBUG_CM,
1614                             "freed pointer = %p\n",
1615                             child_listen_node);
1616                 kfree(child_listen_node);
1617                 cm_parent_listen_node->cm_core->stats_listen_nodes_destroyed++;
1618         }
1619         spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1620
1621         return ret;
1622 }
1623
1624 /**
1625  * i40iw_netdev_vlan_ipv6 - Gets the netdev and vlan
1626  * @addr: local IPv6 address
1627  * @vlan_id: vlan id for the given IPv6 address
1628  *
1629  * Returns the net_device of the IPv6 address and also sets the
1630  * vlan id for that address.
1631  */
1632 static struct net_device *i40iw_netdev_vlan_ipv6(u32 *addr, u16 *vlan_id)
1633 {
1634         struct net_device *ip_dev = NULL;
1635         struct in6_addr laddr6;
1636
1637         if (!IS_ENABLED(CONFIG_IPV6))
1638                 return NULL;
1639         i40iw_copy_ip_htonl(laddr6.in6_u.u6_addr32, addr);
1640         if (vlan_id)
1641                 *vlan_id = I40IW_NO_VLAN;
1642         rcu_read_lock();
1643         for_each_netdev_rcu(&init_net, ip_dev) {
1644                 if (ipv6_chk_addr(&init_net, &laddr6, ip_dev, 1)) {
1645                         if (vlan_id)
1646                                 *vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1647                         break;
1648                 }
1649         }
1650         rcu_read_unlock();
1651         return ip_dev;
1652 }
1653
1654 /**
1655  * i40iw_get_vlan_ipv4 - Returns the vlan_id for IPv4 address
1656  * @addr: local IPv4 address
1657  */
1658 static u16 i40iw_get_vlan_ipv4(u32 *addr)
1659 {
1660         struct net_device *netdev;
1661         u16 vlan_id = I40IW_NO_VLAN;
1662
1663         netdev = ip_dev_find(&init_net, htonl(addr[0]));
1664         if (netdev) {
1665                 vlan_id = rdma_vlan_dev_vlan_id(netdev);
1666                 dev_put(netdev);
1667         }
1668         return vlan_id;
1669 }
1670
1671 /**
1672  * i40iw_add_mqh_6 - Adds multiple qhashes for IPv6
1673  * @iwdev: iWarp device
1674  * @cm_info: CM info for parent listen node
1675  * @cm_parent_listen_node: The parent listen node
1676  *
1677  * Adds a qhash and a child listen node for every IPv6 address
1678  * on the adapter and adds the associated qhash filter
1679  */
1680 static enum i40iw_status_code i40iw_add_mqh_6(struct i40iw_device *iwdev,
1681                                               struct i40iw_cm_info *cm_info,
1682                                               struct i40iw_cm_listener *cm_parent_listen_node)
1683 {
1684         struct net_device *ip_dev;
1685         struct inet6_dev *idev;
1686         struct inet6_ifaddr *ifp, *tmp;
1687         enum i40iw_status_code ret = 0;
1688         struct i40iw_cm_listener *child_listen_node;
1689         unsigned long flags;
1690
1691         rtnl_lock();
1692         for_each_netdev(&init_net, ip_dev) {
1693                 if ((((rdma_vlan_dev_vlan_id(ip_dev) < I40IW_NO_VLAN) &&
1694                       (rdma_vlan_dev_real_dev(ip_dev) == iwdev->netdev)) ||
1695                      (ip_dev == iwdev->netdev)) && (ip_dev->flags & IFF_UP)) {
1696                         idev = __in6_dev_get(ip_dev);
1697                         if (!idev) {
1698                                 i40iw_pr_err("idev == NULL\n");
1699                                 break;
1700                         }
1701                         list_for_each_entry_safe(ifp, tmp, &idev->addr_list, if_list) {
1702                                 i40iw_debug(&iwdev->sc_dev,
1703                                             I40IW_DEBUG_CM,
1704                                             "IP=%pI6, vlan_id=%d, MAC=%pM\n",
1705                                             &ifp->addr,
1706                                             rdma_vlan_dev_vlan_id(ip_dev),
1707                                             ip_dev->dev_addr);
1708                                 child_listen_node =
1709                                         kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
1710                                 i40iw_debug(&iwdev->sc_dev,
1711                                             I40IW_DEBUG_CM,
1712                                             "Allocating child listener %p\n",
1713                                             child_listen_node);
1714                                 if (!child_listen_node) {
1715                                         ret = I40IW_ERR_NO_MEMORY;
1716                                         goto exit;
1717                                 }
1718                                 cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1719                                 cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1720
1721                                 memcpy(child_listen_node, cm_parent_listen_node,
1722                                        sizeof(*child_listen_node));
1723
1724                                 i40iw_copy_ip_ntohl(child_listen_node->loc_addr,
1725                                                     ifp->addr.in6_u.u6_addr32);
1726                                 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1727                                        sizeof(cm_info->loc_addr));
1728
1729                                 ret = i40iw_manage_qhash(iwdev, cm_info,
1730                                                          I40IW_QHASH_TYPE_TCP_SYN,
1731                                                          I40IW_QHASH_MANAGE_TYPE_ADD,
1732                                                          NULL, true);
1733                                 if (!ret) {
1734                                         child_listen_node->qhash_set = true;
1735                                         spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1736                                         list_add(&child_listen_node->child_listen_list,
1737                                                  &cm_parent_listen_node->child_listen_list);
1738                                         spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1739                                         cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
1740                                 } else {
1741                                         kfree(child_listen_node);
1742                                 }
1743                         }
1744                 }
1745         }
1746 exit:
1747         rtnl_unlock();
1748         return ret;
1749 }
1750
1751 /**
1752  * i40iw_add_mqh_4 - Adds multiple qhashes for IPv4
1753  * @iwdev: iWarp device
1754  * @cm_info: CM info for parent listen node
1755  * @cm_parent_listen_node: The parent listen node
1756  *
1757  * Adds a qhash and a child listen node for every IPv4 address
1758  * on the adapter and adds the associated qhash filter
1759  */
1760 static enum i40iw_status_code i40iw_add_mqh_4(
1761                                 struct i40iw_device *iwdev,
1762                                 struct i40iw_cm_info *cm_info,
1763                                 struct i40iw_cm_listener *cm_parent_listen_node)
1764 {
1765         struct net_device *dev;
1766         struct in_device *idev;
1767         struct i40iw_cm_listener *child_listen_node;
1768         enum i40iw_status_code ret = 0;
1769         unsigned long flags;
1770
1771         rtnl_lock();
1772         for_each_netdev(&init_net, dev) {
1773                 if ((((rdma_vlan_dev_vlan_id(dev) < I40IW_NO_VLAN) &&
1774                       (rdma_vlan_dev_real_dev(dev) == iwdev->netdev)) ||
1775                     (dev == iwdev->netdev)) && (dev->flags & IFF_UP)) {
1776                         const struct in_ifaddr *ifa;
1777
1778                         idev = in_dev_get(dev);
1779
1780                         in_dev_for_each_ifa_rtnl(ifa, idev) {
1781                                 i40iw_debug(&iwdev->sc_dev,
1782                                             I40IW_DEBUG_CM,
1783                                             "Allocating child CM Listener forIP=%pI4, vlan_id=%d, MAC=%pM\n",
1784                                             &ifa->ifa_address,
1785                                             rdma_vlan_dev_vlan_id(dev),
1786                                             dev->dev_addr);
1787                                 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_KERNEL);
1788                                 cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
1789                                 i40iw_debug(&iwdev->sc_dev,
1790                                             I40IW_DEBUG_CM,
1791                                             "Allocating child listener %p\n",
1792                                             child_listen_node);
1793                                 if (!child_listen_node) {
1794                                         in_dev_put(idev);
1795                                         ret = I40IW_ERR_NO_MEMORY;
1796                                         goto exit;
1797                                 }
1798                                 cm_info->vlan_id = rdma_vlan_dev_vlan_id(dev);
1799                                 cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1800                                 memcpy(child_listen_node,
1801                                        cm_parent_listen_node,
1802                                        sizeof(*child_listen_node));
1803
1804                                 child_listen_node->loc_addr[0] = ntohl(ifa->ifa_address);
1805                                 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1806                                        sizeof(cm_info->loc_addr));
1807
1808                                 ret = i40iw_manage_qhash(iwdev,
1809                                                          cm_info,
1810                                                          I40IW_QHASH_TYPE_TCP_SYN,
1811                                                          I40IW_QHASH_MANAGE_TYPE_ADD,
1812                                                          NULL,
1813                                                          true);
1814                                 if (!ret) {
1815                                         child_listen_node->qhash_set = true;
1816                                         spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1817                                         list_add(&child_listen_node->child_listen_list,
1818                                                  &cm_parent_listen_node->child_listen_list);
1819                                         spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1820                                 } else {
1821                                         kfree(child_listen_node);
1822                                         cm_parent_listen_node->cm_core->stats_listen_nodes_created--;
1823                                 }
1824                         }
1825
1826                         in_dev_put(idev);
1827                 }
1828         }
1829 exit:
1830         rtnl_unlock();
1831         return ret;
1832 }
1833
1834 /**
1835  * i40iw_dec_refcnt_listen - delete listener and associated cm nodes
1836  * @cm_core: cm's core
1837  * @free_hanging_nodes: to free associated cm_nodes
1838  * @apbvt_del: flag to delete the apbvt
1839  */
1840 static int i40iw_dec_refcnt_listen(struct i40iw_cm_core *cm_core,
1841                                    struct i40iw_cm_listener *listener,
1842                                    int free_hanging_nodes, bool apbvt_del)
1843 {
1844         int ret = -EINVAL;
1845         int err = 0;
1846         struct list_head *list_pos;
1847         struct list_head *list_temp;
1848         struct i40iw_cm_node *cm_node;
1849         struct list_head reset_list;
1850         struct i40iw_cm_info nfo;
1851         struct i40iw_cm_node *loopback;
1852         enum i40iw_cm_node_state old_state;
1853         unsigned long flags;
1854
1855         /* free non-accelerated child nodes for this listener */
1856         INIT_LIST_HEAD(&reset_list);
1857         if (free_hanging_nodes) {
1858                 spin_lock_irqsave(&cm_core->ht_lock, flags);
1859                 list_for_each_safe(list_pos,
1860                                    list_temp, &cm_core->non_accelerated_list) {
1861                         cm_node = container_of(list_pos, struct i40iw_cm_node, list);
1862                         if ((cm_node->listener == listener) &&
1863                             !cm_node->accelerated) {
1864                                 atomic_inc(&cm_node->ref_count);
1865                                 list_add(&cm_node->reset_entry, &reset_list);
1866                         }
1867                 }
1868                 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1869         }
1870
1871         list_for_each_safe(list_pos, list_temp, &reset_list) {
1872                 cm_node = container_of(list_pos, struct i40iw_cm_node, reset_entry);
1873                 loopback = cm_node->loopbackpartner;
1874                 if (cm_node->state >= I40IW_CM_STATE_FIN_WAIT1) {
1875                         i40iw_rem_ref_cm_node(cm_node);
1876                 } else {
1877                         if (!loopback) {
1878                                 i40iw_cleanup_retrans_entry(cm_node);
1879                                 err = i40iw_send_reset(cm_node);
1880                                 if (err) {
1881                                         cm_node->state = I40IW_CM_STATE_CLOSED;
1882                                         i40iw_pr_err("send reset\n");
1883                                 } else {
1884                                         old_state = cm_node->state;
1885                                         cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED;
1886                                         if (old_state != I40IW_CM_STATE_MPAREQ_RCVD)
1887                                                 i40iw_rem_ref_cm_node(cm_node);
1888                                 }
1889                         } else {
1890                                 struct i40iw_cm_event event;
1891
1892                                 event.cm_node = loopback;
1893                                 memcpy(event.cm_info.rem_addr,
1894                                        loopback->rem_addr, sizeof(event.cm_info.rem_addr));
1895                                 memcpy(event.cm_info.loc_addr,
1896                                        loopback->loc_addr, sizeof(event.cm_info.loc_addr));
1897                                 event.cm_info.rem_port = loopback->rem_port;
1898                                 event.cm_info.loc_port = loopback->loc_port;
1899                                 event.cm_info.cm_id = loopback->cm_id;
1900                                 event.cm_info.ipv4 = loopback->ipv4;
1901                                 atomic_inc(&loopback->ref_count);
1902                                 loopback->state = I40IW_CM_STATE_CLOSED;
1903                                 i40iw_event_connect_error(&event);
1904                                 cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED;
1905                                 i40iw_rem_ref_cm_node(cm_node);
1906                         }
1907                 }
1908         }
1909
1910         if (!atomic_dec_return(&listener->ref_count)) {
1911                 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1912                 list_del(&listener->list);
1913                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1914
1915                 if (listener->iwdev) {
1916                         if (apbvt_del)
1917                                 i40iw_manage_apbvt(listener->iwdev,
1918                                                    listener->loc_port,
1919                                                    I40IW_MANAGE_APBVT_DEL);
1920
1921                         memcpy(nfo.loc_addr, listener->loc_addr, sizeof(nfo.loc_addr));
1922                         nfo.loc_port = listener->loc_port;
1923                         nfo.ipv4 = listener->ipv4;
1924                         nfo.vlan_id = listener->vlan_id;
1925                         nfo.user_pri = listener->user_pri;
1926
1927                         if (!list_empty(&listener->child_listen_list)) {
1928                                 i40iw_del_multiple_qhash(listener->iwdev, &nfo, listener);
1929                         } else {
1930                                 if (listener->qhash_set)
1931                                         i40iw_manage_qhash(listener->iwdev,
1932                                                            &nfo,
1933                                                            I40IW_QHASH_TYPE_TCP_SYN,
1934                                                            I40IW_QHASH_MANAGE_TYPE_DELETE,
1935                                                            NULL,
1936                                                            false);
1937                         }
1938                 }
1939
1940                 cm_core->stats_listen_destroyed++;
1941                 kfree(listener);
1942                 cm_core->stats_listen_nodes_destroyed++;
1943                 listener = NULL;
1944                 ret = 0;
1945         }
1946
1947         if (listener) {
1948                 if (atomic_read(&listener->pend_accepts_cnt) > 0)
1949                         i40iw_debug(cm_core->dev,
1950                                     I40IW_DEBUG_CM,
1951                                     "%s: listener (%p) pending accepts=%u\n",
1952                                     __func__,
1953                                     listener,
1954                                     atomic_read(&listener->pend_accepts_cnt));
1955         }
1956
1957         return ret;
1958 }
1959
1960 /**
1961  * i40iw_cm_del_listen - delete a linstener
1962  * @cm_core: cm's core
1963   * @listener: passive connection's listener
1964  * @apbvt_del: flag to delete apbvt
1965  */
1966 static int i40iw_cm_del_listen(struct i40iw_cm_core *cm_core,
1967                                struct i40iw_cm_listener *listener,
1968                                bool apbvt_del)
1969 {
1970         listener->listener_state = I40IW_CM_LISTENER_PASSIVE_STATE;
1971         listener->cm_id = NULL; /* going to be destroyed pretty soon */
1972         return i40iw_dec_refcnt_listen(cm_core, listener, 1, apbvt_del);
1973 }
1974
1975 /**
1976  * i40iw_addr_resolve_neigh - resolve neighbor address
1977  * @iwdev: iwarp device structure
1978  * @src_ip: local ip address
1979  * @dst_ip: remote ip address
1980  * @arpindex: if there is an arp entry
1981  */
1982 static int i40iw_addr_resolve_neigh(struct i40iw_device *iwdev,
1983                                     u32 src_ip,
1984                                     u32 dst_ip,
1985                                     int arpindex)
1986 {
1987         struct rtable *rt;
1988         struct neighbour *neigh;
1989         int rc = arpindex;
1990         struct net_device *netdev = iwdev->netdev;
1991         __be32 dst_ipaddr = htonl(dst_ip);
1992         __be32 src_ipaddr = htonl(src_ip);
1993
1994         rt = ip_route_output(&init_net, dst_ipaddr, src_ipaddr, 0, 0);
1995         if (IS_ERR(rt)) {
1996                 i40iw_pr_err("ip_route_output\n");
1997                 return rc;
1998         }
1999
2000         if (netif_is_bond_slave(netdev))
2001                 netdev = netdev_master_upper_dev_get(netdev);
2002
2003         neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr);
2004
2005         rcu_read_lock();
2006         if (neigh) {
2007                 if (neigh->nud_state & NUD_VALID) {
2008                         if (arpindex >= 0) {
2009                                 if (ether_addr_equal(iwdev->arp_table[arpindex].mac_addr,
2010                                                      neigh->ha))
2011                                         /* Mac address same as arp table */
2012                                         goto resolve_neigh_exit;
2013                                 i40iw_manage_arp_cache(iwdev,
2014                                                        iwdev->arp_table[arpindex].mac_addr,
2015                                                        &dst_ip,
2016                                                        true,
2017                                                        I40IW_ARP_DELETE);
2018                         }
2019
2020                         i40iw_manage_arp_cache(iwdev, neigh->ha, &dst_ip, true, I40IW_ARP_ADD);
2021                         rc = i40iw_arp_table(iwdev, &dst_ip, true, NULL, I40IW_ARP_RESOLVE);
2022                 } else {
2023                         neigh_event_send(neigh, NULL);
2024                 }
2025         }
2026  resolve_neigh_exit:
2027
2028         rcu_read_unlock();
2029         if (neigh)
2030                 neigh_release(neigh);
2031
2032         ip_rt_put(rt);
2033         return rc;
2034 }
2035
2036 /**
2037  * i40iw_get_dst_ipv6
2038  */
2039 static struct dst_entry *i40iw_get_dst_ipv6(struct sockaddr_in6 *src_addr,
2040                                             struct sockaddr_in6 *dst_addr)
2041 {
2042         struct dst_entry *dst;
2043         struct flowi6 fl6;
2044
2045         memset(&fl6, 0, sizeof(fl6));
2046         fl6.daddr = dst_addr->sin6_addr;
2047         fl6.saddr = src_addr->sin6_addr;
2048         if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
2049                 fl6.flowi6_oif = dst_addr->sin6_scope_id;
2050
2051         dst = ip6_route_output(&init_net, NULL, &fl6);
2052         return dst;
2053 }
2054
2055 /**
2056  * i40iw_addr_resolve_neigh_ipv6 - resolve neighbor ipv6 address
2057  * @iwdev: iwarp device structure
2058  * @dst_ip: remote ip address
2059  * @arpindex: if there is an arp entry
2060  */
2061 static int i40iw_addr_resolve_neigh_ipv6(struct i40iw_device *iwdev,
2062                                          u32 *src,
2063                                          u32 *dest,
2064                                          int arpindex)
2065 {
2066         struct neighbour *neigh;
2067         int rc = arpindex;
2068         struct net_device *netdev = iwdev->netdev;
2069         struct dst_entry *dst;
2070         struct sockaddr_in6 dst_addr;
2071         struct sockaddr_in6 src_addr;
2072
2073         memset(&dst_addr, 0, sizeof(dst_addr));
2074         dst_addr.sin6_family = AF_INET6;
2075         i40iw_copy_ip_htonl(dst_addr.sin6_addr.in6_u.u6_addr32, dest);
2076         memset(&src_addr, 0, sizeof(src_addr));
2077         src_addr.sin6_family = AF_INET6;
2078         i40iw_copy_ip_htonl(src_addr.sin6_addr.in6_u.u6_addr32, src);
2079         dst = i40iw_get_dst_ipv6(&src_addr, &dst_addr);
2080         if (!dst || dst->error) {
2081                 if (dst) {
2082                         dst_release(dst);
2083                         i40iw_pr_err("ip6_route_output returned dst->error = %d\n",
2084                                      dst->error);
2085                 }
2086                 return rc;
2087         }
2088
2089         if (netif_is_bond_slave(netdev))
2090                 netdev = netdev_master_upper_dev_get(netdev);
2091
2092         neigh = dst_neigh_lookup(dst, dst_addr.sin6_addr.in6_u.u6_addr32);
2093
2094         rcu_read_lock();
2095         if (neigh) {
2096                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "dst_neigh_lookup MAC=%pM\n", neigh->ha);
2097                 if (neigh->nud_state & NUD_VALID) {
2098                         if (arpindex >= 0) {
2099                                 if (ether_addr_equal
2100                                     (iwdev->arp_table[arpindex].mac_addr,
2101                                      neigh->ha)) {
2102                                         /* Mac address same as in arp table */
2103                                         goto resolve_neigh_exit6;
2104                                 }
2105                                 i40iw_manage_arp_cache(iwdev,
2106                                                        iwdev->arp_table[arpindex].mac_addr,
2107                                                        dest,
2108                                                        false,
2109                                                        I40IW_ARP_DELETE);
2110                         }
2111                         i40iw_manage_arp_cache(iwdev,
2112                                                neigh->ha,
2113                                                dest,
2114                                                false,
2115                                                I40IW_ARP_ADD);
2116                         rc = i40iw_arp_table(iwdev,
2117                                              dest,
2118                                              false,
2119                                              NULL,
2120                                              I40IW_ARP_RESOLVE);
2121                 } else {
2122                         neigh_event_send(neigh, NULL);
2123                 }
2124         }
2125
2126  resolve_neigh_exit6:
2127         rcu_read_unlock();
2128         if (neigh)
2129                 neigh_release(neigh);
2130         dst_release(dst);
2131         return rc;
2132 }
2133
2134 /**
2135  * i40iw_ipv4_is_loopback - check if loopback
2136  * @loc_addr: local addr to compare
2137  * @rem_addr: remote address
2138  */
2139 static bool i40iw_ipv4_is_loopback(u32 loc_addr, u32 rem_addr)
2140 {
2141         return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr);
2142 }
2143
2144 /**
2145  * i40iw_ipv6_is_loopback - check if loopback
2146  * @loc_addr: local addr to compare
2147  * @rem_addr: remote address
2148  */
2149 static bool i40iw_ipv6_is_loopback(u32 *loc_addr, u32 *rem_addr)
2150 {
2151         struct in6_addr raddr6;
2152
2153         i40iw_copy_ip_htonl(raddr6.in6_u.u6_addr32, rem_addr);
2154         return !memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6);
2155 }
2156
2157 /**
2158  * i40iw_make_cm_node - create a new instance of a cm node
2159  * @cm_core: cm's core
2160  * @iwdev: iwarp device structure
2161  * @cm_info: quad info for connection
2162  * @listener: passive connection's listener
2163  */
2164 static struct i40iw_cm_node *i40iw_make_cm_node(
2165                                    struct i40iw_cm_core *cm_core,
2166                                    struct i40iw_device *iwdev,
2167                                    struct i40iw_cm_info *cm_info,
2168                                    struct i40iw_cm_listener *listener)
2169 {
2170         struct i40iw_cm_node *cm_node;
2171         int oldarpindex;
2172         int arpindex;
2173         struct net_device *netdev = iwdev->netdev;
2174
2175         /* create an hte and cm_node for this instance */
2176         cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
2177         if (!cm_node)
2178                 return NULL;
2179
2180         /* set our node specific transport info */
2181         cm_node->ipv4 = cm_info->ipv4;
2182         cm_node->vlan_id = cm_info->vlan_id;
2183         if ((cm_node->vlan_id == I40IW_NO_VLAN) && iwdev->dcb)
2184                 cm_node->vlan_id = 0;
2185         cm_node->tos = cm_info->tos;
2186         cm_node->user_pri = cm_info->user_pri;
2187         if (listener) {
2188                 if (listener->tos != cm_info->tos)
2189                         i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB,
2190                                     "application TOS[%d] and remote client TOS[%d] mismatch\n",
2191                                      listener->tos, cm_info->tos);
2192                 cm_node->tos = max(listener->tos, cm_info->tos);
2193                 cm_node->user_pri = rt_tos2priority(cm_node->tos);
2194                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB, "listener: TOS:[%d] UP:[%d]\n",
2195                             cm_node->tos, cm_node->user_pri);
2196         }
2197         memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr));
2198         memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr));
2199         cm_node->loc_port = cm_info->loc_port;
2200         cm_node->rem_port = cm_info->rem_port;
2201
2202         cm_node->mpa_frame_rev = iwdev->mpa_version;
2203         cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
2204         cm_node->ird_size = I40IW_MAX_IRD_SIZE;
2205         cm_node->ord_size = I40IW_MAX_ORD_SIZE;
2206
2207         cm_node->listener = listener;
2208         cm_node->cm_id = cm_info->cm_id;
2209         ether_addr_copy(cm_node->loc_mac, netdev->dev_addr);
2210         spin_lock_init(&cm_node->retrans_list_lock);
2211         cm_node->ack_rcvd = false;
2212
2213         atomic_set(&cm_node->ref_count, 1);
2214         /* associate our parent CM core */
2215         cm_node->cm_core = cm_core;
2216         cm_node->tcp_cntxt.loc_id = I40IW_CM_DEF_LOCAL_ID;
2217         cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE;
2218         cm_node->tcp_cntxt.rcv_wnd =
2219                         I40IW_CM_DEFAULT_RCV_WND_SCALED >> I40IW_CM_DEFAULT_RCV_WND_SCALE;
2220         if (cm_node->ipv4) {
2221                 cm_node->tcp_cntxt.loc_seq_num = secure_tcp_seq(htonl(cm_node->loc_addr[0]),
2222                                                         htonl(cm_node->rem_addr[0]),
2223                                                         htons(cm_node->loc_port),
2224                                                         htons(cm_node->rem_port));
2225                 cm_node->tcp_cntxt.mss = iwdev->vsi.mtu - I40IW_MTU_TO_MSS_IPV4;
2226         } else if (IS_ENABLED(CONFIG_IPV6)) {
2227                 __be32 loc[4] = {
2228                         htonl(cm_node->loc_addr[0]), htonl(cm_node->loc_addr[1]),
2229                         htonl(cm_node->loc_addr[2]), htonl(cm_node->loc_addr[3])
2230                 };
2231                 __be32 rem[4] = {
2232                         htonl(cm_node->rem_addr[0]), htonl(cm_node->rem_addr[1]),
2233                         htonl(cm_node->rem_addr[2]), htonl(cm_node->rem_addr[3])
2234                 };
2235                 cm_node->tcp_cntxt.loc_seq_num = secure_tcpv6_seq(loc, rem,
2236                                                         htons(cm_node->loc_port),
2237                                                         htons(cm_node->rem_port));
2238                 cm_node->tcp_cntxt.mss = iwdev->vsi.mtu - I40IW_MTU_TO_MSS_IPV6;
2239         }
2240
2241         cm_node->iwdev = iwdev;
2242         cm_node->dev = &iwdev->sc_dev;
2243
2244         if ((cm_node->ipv4 &&
2245              i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
2246              (!cm_node->ipv4 && i40iw_ipv6_is_loopback(cm_node->loc_addr,
2247                                                        cm_node->rem_addr))) {
2248                 arpindex = i40iw_arp_table(iwdev,
2249                                            cm_node->rem_addr,
2250                                            false,
2251                                            NULL,
2252                                            I40IW_ARP_RESOLVE);
2253         } else {
2254                 oldarpindex = i40iw_arp_table(iwdev,
2255                                               cm_node->rem_addr,
2256                                               false,
2257                                               NULL,
2258                                               I40IW_ARP_RESOLVE);
2259                 if (cm_node->ipv4)
2260                         arpindex = i40iw_addr_resolve_neigh(iwdev,
2261                                                             cm_info->loc_addr[0],
2262                                                             cm_info->rem_addr[0],
2263                                                             oldarpindex);
2264                 else if (IS_ENABLED(CONFIG_IPV6))
2265                         arpindex = i40iw_addr_resolve_neigh_ipv6(iwdev,
2266                                                                  cm_info->loc_addr,
2267                                                                  cm_info->rem_addr,
2268                                                                  oldarpindex);
2269                 else
2270                         arpindex = -EINVAL;
2271         }
2272         if (arpindex < 0) {
2273                 i40iw_pr_err("cm_node arpindex\n");
2274                 kfree(cm_node);
2275                 return NULL;
2276         }
2277         ether_addr_copy(cm_node->rem_mac, iwdev->arp_table[arpindex].mac_addr);
2278         i40iw_add_hte_node(cm_core, cm_node);
2279         cm_core->stats_nodes_created++;
2280         return cm_node;
2281 }
2282
2283 /**
2284  * i40iw_rem_ref_cm_node - destroy an instance of a cm node
2285  * @cm_node: connection's node
2286  */
2287 static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *cm_node)
2288 {
2289         struct i40iw_cm_core *cm_core = cm_node->cm_core;
2290         struct i40iw_qp *iwqp;
2291         struct i40iw_cm_info nfo;
2292         unsigned long flags;
2293
2294         spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
2295         if (atomic_dec_return(&cm_node->ref_count)) {
2296                 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
2297                 return;
2298         }
2299         list_del(&cm_node->list);
2300         spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
2301
2302         /* if the node is destroyed before connection was accelerated */
2303         if (!cm_node->accelerated && cm_node->accept_pend) {
2304                 pr_err("node destroyed before established\n");
2305                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
2306         }
2307         if (cm_node->close_entry)
2308                 i40iw_handle_close_entry(cm_node, 0);
2309         if (cm_node->listener) {
2310                 i40iw_dec_refcnt_listen(cm_core, cm_node->listener, 0, true);
2311         } else {
2312                 if (cm_node->apbvt_set) {
2313                         i40iw_manage_apbvt(cm_node->iwdev,
2314                                            cm_node->loc_port,
2315                                            I40IW_MANAGE_APBVT_DEL);
2316                         cm_node->apbvt_set = 0;
2317                 }
2318                 i40iw_get_addr_info(cm_node, &nfo);
2319                 if (cm_node->qhash_set) {
2320                         i40iw_manage_qhash(cm_node->iwdev,
2321                                            &nfo,
2322                                            I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2323                                            I40IW_QHASH_MANAGE_TYPE_DELETE,
2324                                            NULL,
2325                                            false);
2326                         cm_node->qhash_set = 0;
2327                 }
2328         }
2329
2330         iwqp = cm_node->iwqp;
2331         if (iwqp) {
2332                 iwqp->cm_node = NULL;
2333                 i40iw_rem_ref(&iwqp->ibqp);
2334                 cm_node->iwqp = NULL;
2335         } else if (cm_node->qhash_set) {
2336                 i40iw_get_addr_info(cm_node, &nfo);
2337                 i40iw_manage_qhash(cm_node->iwdev,
2338                                    &nfo,
2339                                    I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2340                                    I40IW_QHASH_MANAGE_TYPE_DELETE,
2341                                    NULL,
2342                                    false);
2343                 cm_node->qhash_set = 0;
2344         }
2345
2346         cm_node->cm_core->stats_nodes_destroyed++;
2347         kfree(cm_node);
2348 }
2349
2350 /**
2351  * i40iw_handle_fin_pkt - FIN packet received
2352  * @cm_node: connection's node
2353  */
2354 static void i40iw_handle_fin_pkt(struct i40iw_cm_node *cm_node)
2355 {
2356         u32 ret;
2357
2358         switch (cm_node->state) {
2359         case I40IW_CM_STATE_SYN_RCVD:
2360         case I40IW_CM_STATE_SYN_SENT:
2361         case I40IW_CM_STATE_ESTABLISHED:
2362         case I40IW_CM_STATE_MPAREJ_RCVD:
2363                 cm_node->tcp_cntxt.rcv_nxt++;
2364                 i40iw_cleanup_retrans_entry(cm_node);
2365                 cm_node->state = I40IW_CM_STATE_LAST_ACK;
2366                 i40iw_send_fin(cm_node);
2367                 break;
2368         case I40IW_CM_STATE_MPAREQ_SENT:
2369                 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
2370                 cm_node->tcp_cntxt.rcv_nxt++;
2371                 i40iw_cleanup_retrans_entry(cm_node);
2372                 cm_node->state = I40IW_CM_STATE_CLOSED;
2373                 atomic_inc(&cm_node->ref_count);
2374                 i40iw_send_reset(cm_node);
2375                 break;
2376         case I40IW_CM_STATE_FIN_WAIT1:
2377                 cm_node->tcp_cntxt.rcv_nxt++;
2378                 i40iw_cleanup_retrans_entry(cm_node);
2379                 cm_node->state = I40IW_CM_STATE_CLOSING;
2380                 i40iw_send_ack(cm_node);
2381                 /*
2382                  * Wait for ACK as this is simultaneous close.
2383                  * After we receive ACK, do not send anything.
2384                  * Just rm the node.
2385                  */
2386                 break;
2387         case I40IW_CM_STATE_FIN_WAIT2:
2388                 cm_node->tcp_cntxt.rcv_nxt++;
2389                 i40iw_cleanup_retrans_entry(cm_node);
2390                 cm_node->state = I40IW_CM_STATE_TIME_WAIT;
2391                 i40iw_send_ack(cm_node);
2392                 ret =
2393                     i40iw_schedule_cm_timer(cm_node, NULL, I40IW_TIMER_TYPE_CLOSE, 1, 0);
2394                 if (ret)
2395                         i40iw_pr_err("node %p state = %d\n", cm_node, cm_node->state);
2396                 break;
2397         case I40IW_CM_STATE_TIME_WAIT:
2398                 cm_node->tcp_cntxt.rcv_nxt++;
2399                 i40iw_cleanup_retrans_entry(cm_node);
2400                 cm_node->state = I40IW_CM_STATE_CLOSED;
2401                 i40iw_rem_ref_cm_node(cm_node);
2402                 break;
2403         case I40IW_CM_STATE_OFFLOADED:
2404         default:
2405                 i40iw_pr_err("bad state node %p state = %d\n", cm_node, cm_node->state);
2406                 break;
2407         }
2408 }
2409
2410 /**
2411  * i40iw_handle_rst_pkt - process received RST packet
2412  * @cm_node: connection's node
2413  * @rbuf: receive buffer
2414  */
2415 static void i40iw_handle_rst_pkt(struct i40iw_cm_node *cm_node,
2416                                  struct i40iw_puda_buf *rbuf)
2417 {
2418         i40iw_cleanup_retrans_entry(cm_node);
2419         switch (cm_node->state) {
2420         case I40IW_CM_STATE_SYN_SENT:
2421         case I40IW_CM_STATE_MPAREQ_SENT:
2422                 switch (cm_node->mpa_frame_rev) {
2423                 case IETF_MPA_V2:
2424                         cm_node->mpa_frame_rev = IETF_MPA_V1;
2425                         /* send a syn and goto syn sent state */
2426                         cm_node->state = I40IW_CM_STATE_SYN_SENT;
2427                         if (i40iw_send_syn(cm_node, 0))
2428                                 i40iw_active_open_err(cm_node, false);
2429                         break;
2430                 case IETF_MPA_V1:
2431                 default:
2432                         i40iw_active_open_err(cm_node, false);
2433                         break;
2434                 }
2435                 break;
2436         case I40IW_CM_STATE_MPAREQ_RCVD:
2437                 atomic_add_return(1, &cm_node->passive_state);
2438                 break;
2439         case I40IW_CM_STATE_ESTABLISHED:
2440         case I40IW_CM_STATE_SYN_RCVD:
2441         case I40IW_CM_STATE_LISTENING:
2442                 i40iw_pr_err("Bad state state = %d\n", cm_node->state);
2443                 i40iw_passive_open_err(cm_node, false);
2444                 break;
2445         case I40IW_CM_STATE_OFFLOADED:
2446                 i40iw_active_open_err(cm_node, false);
2447                 break;
2448         case I40IW_CM_STATE_CLOSED:
2449                 break;
2450         case I40IW_CM_STATE_FIN_WAIT2:
2451         case I40IW_CM_STATE_FIN_WAIT1:
2452         case I40IW_CM_STATE_LAST_ACK:
2453                 cm_node->cm_id->rem_ref(cm_node->cm_id);
2454                 /* fall through */
2455         case I40IW_CM_STATE_TIME_WAIT:
2456                 cm_node->state = I40IW_CM_STATE_CLOSED;
2457                 i40iw_rem_ref_cm_node(cm_node);
2458                 break;
2459         default:
2460                 break;
2461         }
2462 }
2463
2464 /**
2465  * i40iw_handle_rcv_mpa - Process a recv'd mpa buffer
2466  * @cm_node: connection's node
2467  * @rbuf: receive buffer
2468  */
2469 static void i40iw_handle_rcv_mpa(struct i40iw_cm_node *cm_node,
2470                                  struct i40iw_puda_buf *rbuf)
2471 {
2472         int ret;
2473         int datasize = rbuf->datalen;
2474         u8 *dataloc = rbuf->data;
2475
2476         enum i40iw_cm_event_type type = I40IW_CM_EVENT_UNKNOWN;
2477         u32 res_type;
2478
2479         ret = i40iw_parse_mpa(cm_node, dataloc, &res_type, datasize);
2480         if (ret) {
2481                 if (cm_node->state == I40IW_CM_STATE_MPAREQ_SENT)
2482                         i40iw_active_open_err(cm_node, true);
2483                 else
2484                         i40iw_passive_open_err(cm_node, true);
2485                 return;
2486         }
2487
2488         switch (cm_node->state) {
2489         case I40IW_CM_STATE_ESTABLISHED:
2490                 if (res_type == I40IW_MPA_REQUEST_REJECT)
2491                         i40iw_pr_err("state for reject\n");
2492                 cm_node->state = I40IW_CM_STATE_MPAREQ_RCVD;
2493                 type = I40IW_CM_EVENT_MPA_REQ;
2494                 i40iw_send_ack(cm_node);        /* ACK received MPA request */
2495                 atomic_set(&cm_node->passive_state,
2496                            I40IW_PASSIVE_STATE_INDICATED);
2497                 break;
2498         case I40IW_CM_STATE_MPAREQ_SENT:
2499                 i40iw_cleanup_retrans_entry(cm_node);
2500                 if (res_type == I40IW_MPA_REQUEST_REJECT) {
2501                         type = I40IW_CM_EVENT_MPA_REJECT;
2502                         cm_node->state = I40IW_CM_STATE_MPAREJ_RCVD;
2503                 } else {
2504                         type = I40IW_CM_EVENT_CONNECTED;
2505                         cm_node->state = I40IW_CM_STATE_OFFLOADED;
2506                 }
2507                 i40iw_send_ack(cm_node);
2508                 break;
2509         default:
2510                 pr_err("%s wrong cm_node state =%d\n", __func__, cm_node->state);
2511                 break;
2512         }
2513         i40iw_create_event(cm_node, type);
2514 }
2515
2516 /**
2517  * i40iw_indicate_pkt_err - Send up err event to cm
2518  * @cm_node: connection's node
2519  */
2520 static void i40iw_indicate_pkt_err(struct i40iw_cm_node *cm_node)
2521 {
2522         switch (cm_node->state) {
2523         case I40IW_CM_STATE_SYN_SENT:
2524         case I40IW_CM_STATE_MPAREQ_SENT:
2525                 i40iw_active_open_err(cm_node, true);
2526                 break;
2527         case I40IW_CM_STATE_ESTABLISHED:
2528         case I40IW_CM_STATE_SYN_RCVD:
2529                 i40iw_passive_open_err(cm_node, true);
2530                 break;
2531         case I40IW_CM_STATE_OFFLOADED:
2532         default:
2533                 break;
2534         }
2535 }
2536
2537 /**
2538  * i40iw_check_syn - Check for error on received syn ack
2539  * @cm_node: connection's node
2540  * @tcph: pointer tcp header
2541  */
2542 static int i40iw_check_syn(struct i40iw_cm_node *cm_node, struct tcphdr *tcph)
2543 {
2544         int err = 0;
2545
2546         if (ntohl(tcph->ack_seq) != cm_node->tcp_cntxt.loc_seq_num) {
2547                 err = 1;
2548                 i40iw_active_open_err(cm_node, true);
2549         }
2550         return err;
2551 }
2552
2553 /**
2554  * i40iw_check_seq - check seq numbers if OK
2555  * @cm_node: connection's node
2556  * @tcph: pointer tcp header
2557  */
2558 static int i40iw_check_seq(struct i40iw_cm_node *cm_node, struct tcphdr *tcph)
2559 {
2560         int err = 0;
2561         u32 seq;
2562         u32 ack_seq;
2563         u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
2564         u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
2565         u32 rcv_wnd;
2566
2567         seq = ntohl(tcph->seq);
2568         ack_seq = ntohl(tcph->ack_seq);
2569         rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
2570         if (ack_seq != loc_seq_num)
2571                 err = -1;
2572         else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
2573                 err = -1;
2574         if (err) {
2575                 i40iw_pr_err("seq number\n");
2576                 i40iw_indicate_pkt_err(cm_node);
2577         }
2578         return err;
2579 }
2580
2581 /**
2582  * i40iw_handle_syn_pkt - is for Passive node
2583  * @cm_node: connection's node
2584  * @rbuf: receive buffer
2585  */
2586 static void i40iw_handle_syn_pkt(struct i40iw_cm_node *cm_node,
2587                                  struct i40iw_puda_buf *rbuf)
2588 {
2589         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2590         int ret;
2591         u32 inc_sequence;
2592         int optionsize;
2593         struct i40iw_cm_info nfo;
2594
2595         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2596         inc_sequence = ntohl(tcph->seq);
2597
2598         switch (cm_node->state) {
2599         case I40IW_CM_STATE_SYN_SENT:
2600         case I40IW_CM_STATE_MPAREQ_SENT:
2601                 /* Rcvd syn on active open connection */
2602                 i40iw_active_open_err(cm_node, 1);
2603                 break;
2604         case I40IW_CM_STATE_LISTENING:
2605                 /* Passive OPEN */
2606                 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
2607                     cm_node->listener->backlog) {
2608                         cm_node->cm_core->stats_backlog_drops++;
2609                         i40iw_passive_open_err(cm_node, false);
2610                         break;
2611                 }
2612                 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1);
2613                 if (ret) {
2614                         i40iw_passive_open_err(cm_node, false);
2615                         /* drop pkt */
2616                         break;
2617                 }
2618                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2619                 cm_node->accept_pend = 1;
2620                 atomic_inc(&cm_node->listener->pend_accepts_cnt);
2621
2622                 cm_node->state = I40IW_CM_STATE_SYN_RCVD;
2623                 i40iw_get_addr_info(cm_node, &nfo);
2624                 ret = i40iw_manage_qhash(cm_node->iwdev,
2625                                          &nfo,
2626                                          I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2627                                          I40IW_QHASH_MANAGE_TYPE_ADD,
2628                                          (void *)cm_node,
2629                                          false);
2630                 cm_node->qhash_set = true;
2631                 break;
2632         case I40IW_CM_STATE_CLOSED:
2633                 i40iw_cleanup_retrans_entry(cm_node);
2634                 atomic_inc(&cm_node->ref_count);
2635                 i40iw_send_reset(cm_node);
2636                 break;
2637         case I40IW_CM_STATE_OFFLOADED:
2638         case I40IW_CM_STATE_ESTABLISHED:
2639         case I40IW_CM_STATE_FIN_WAIT1:
2640         case I40IW_CM_STATE_FIN_WAIT2:
2641         case I40IW_CM_STATE_MPAREQ_RCVD:
2642         case I40IW_CM_STATE_LAST_ACK:
2643         case I40IW_CM_STATE_CLOSING:
2644         case I40IW_CM_STATE_UNKNOWN:
2645         default:
2646                 break;
2647         }
2648 }
2649
2650 /**
2651  * i40iw_handle_synack_pkt - Process SYN+ACK packet (active side)
2652  * @cm_node: connection's node
2653  * @rbuf: receive buffer
2654  */
2655 static void i40iw_handle_synack_pkt(struct i40iw_cm_node *cm_node,
2656                                     struct i40iw_puda_buf *rbuf)
2657 {
2658         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2659         int ret;
2660         u32 inc_sequence;
2661         int optionsize;
2662
2663         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2664         inc_sequence = ntohl(tcph->seq);
2665         switch (cm_node->state) {
2666         case I40IW_CM_STATE_SYN_SENT:
2667                 i40iw_cleanup_retrans_entry(cm_node);
2668                 /* active open */
2669                 if (i40iw_check_syn(cm_node, tcph)) {
2670                         i40iw_pr_err("check syn fail\n");
2671                         return;
2672                 }
2673                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2674                 /* setup options */
2675                 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 0);
2676                 if (ret) {
2677                         i40iw_debug(cm_node->dev,
2678                                     I40IW_DEBUG_CM,
2679                                     "cm_node=%p tcp_options failed\n",
2680                                     cm_node);
2681                         break;
2682                 }
2683                 i40iw_cleanup_retrans_entry(cm_node);
2684                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2685                 i40iw_send_ack(cm_node);        /* ACK  for the syn_ack */
2686                 ret = i40iw_send_mpa_request(cm_node);
2687                 if (ret) {
2688                         i40iw_debug(cm_node->dev,
2689                                     I40IW_DEBUG_CM,
2690                                     "cm_node=%p i40iw_send_mpa_request failed\n",
2691                                     cm_node);
2692                         break;
2693                 }
2694                 cm_node->state = I40IW_CM_STATE_MPAREQ_SENT;
2695                 break;
2696         case I40IW_CM_STATE_MPAREQ_RCVD:
2697                 i40iw_passive_open_err(cm_node, true);
2698                 break;
2699         case I40IW_CM_STATE_LISTENING:
2700                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2701                 i40iw_cleanup_retrans_entry(cm_node);
2702                 cm_node->state = I40IW_CM_STATE_CLOSED;
2703                 i40iw_send_reset(cm_node);
2704                 break;
2705         case I40IW_CM_STATE_CLOSED:
2706                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2707                 i40iw_cleanup_retrans_entry(cm_node);
2708                 atomic_inc(&cm_node->ref_count);
2709                 i40iw_send_reset(cm_node);
2710                 break;
2711         case I40IW_CM_STATE_ESTABLISHED:
2712         case I40IW_CM_STATE_FIN_WAIT1:
2713         case I40IW_CM_STATE_FIN_WAIT2:
2714         case I40IW_CM_STATE_LAST_ACK:
2715         case I40IW_CM_STATE_OFFLOADED:
2716         case I40IW_CM_STATE_CLOSING:
2717         case I40IW_CM_STATE_UNKNOWN:
2718         case I40IW_CM_STATE_MPAREQ_SENT:
2719         default:
2720                 break;
2721         }
2722 }
2723
2724 /**
2725  * i40iw_handle_ack_pkt - process packet with ACK
2726  * @cm_node: connection's node
2727  * @rbuf: receive buffer
2728  */
2729 static int i40iw_handle_ack_pkt(struct i40iw_cm_node *cm_node,
2730                                 struct i40iw_puda_buf *rbuf)
2731 {
2732         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2733         u32 inc_sequence;
2734         int ret = 0;
2735         int optionsize;
2736         u32 datasize = rbuf->datalen;
2737
2738         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2739
2740         if (i40iw_check_seq(cm_node, tcph))
2741                 return -EINVAL;
2742
2743         inc_sequence = ntohl(tcph->seq);
2744         switch (cm_node->state) {
2745         case I40IW_CM_STATE_SYN_RCVD:
2746                 i40iw_cleanup_retrans_entry(cm_node);
2747                 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1);
2748                 if (ret)
2749                         break;
2750                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2751                 cm_node->state = I40IW_CM_STATE_ESTABLISHED;
2752                 if (datasize) {
2753                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2754                         i40iw_handle_rcv_mpa(cm_node, rbuf);
2755                 }
2756                 break;
2757         case I40IW_CM_STATE_ESTABLISHED:
2758                 i40iw_cleanup_retrans_entry(cm_node);
2759                 if (datasize) {
2760                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2761                         i40iw_handle_rcv_mpa(cm_node, rbuf);
2762                 }
2763                 break;
2764         case I40IW_CM_STATE_MPAREQ_SENT:
2765                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2766                 if (datasize) {
2767                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2768                         cm_node->ack_rcvd = false;
2769                         i40iw_handle_rcv_mpa(cm_node, rbuf);
2770                 } else {
2771                         cm_node->ack_rcvd = true;
2772                 }
2773                 break;
2774         case I40IW_CM_STATE_LISTENING:
2775                 i40iw_cleanup_retrans_entry(cm_node);
2776                 cm_node->state = I40IW_CM_STATE_CLOSED;
2777                 i40iw_send_reset(cm_node);
2778                 break;
2779         case I40IW_CM_STATE_CLOSED:
2780                 i40iw_cleanup_retrans_entry(cm_node);
2781                 atomic_inc(&cm_node->ref_count);
2782                 i40iw_send_reset(cm_node);
2783                 break;
2784         case I40IW_CM_STATE_LAST_ACK:
2785         case I40IW_CM_STATE_CLOSING:
2786                 i40iw_cleanup_retrans_entry(cm_node);
2787                 cm_node->state = I40IW_CM_STATE_CLOSED;
2788                 if (!cm_node->accept_pend)
2789                         cm_node->cm_id->rem_ref(cm_node->cm_id);
2790                 i40iw_rem_ref_cm_node(cm_node);
2791                 break;
2792         case I40IW_CM_STATE_FIN_WAIT1:
2793                 i40iw_cleanup_retrans_entry(cm_node);
2794                 cm_node->state = I40IW_CM_STATE_FIN_WAIT2;
2795                 break;
2796         case I40IW_CM_STATE_SYN_SENT:
2797         case I40IW_CM_STATE_FIN_WAIT2:
2798         case I40IW_CM_STATE_OFFLOADED:
2799         case I40IW_CM_STATE_MPAREQ_RCVD:
2800         case I40IW_CM_STATE_UNKNOWN:
2801         default:
2802                 i40iw_cleanup_retrans_entry(cm_node);
2803                 break;
2804         }
2805         return ret;
2806 }
2807
2808 /**
2809  * i40iw_process_packet - process cm packet
2810  * @cm_node: connection's node
2811  * @rbuf: receive buffer
2812  */
2813 static void i40iw_process_packet(struct i40iw_cm_node *cm_node,
2814                                  struct i40iw_puda_buf *rbuf)
2815 {
2816         enum i40iw_tcpip_pkt_type pkt_type = I40IW_PKT_TYPE_UNKNOWN;
2817         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2818         u32 fin_set = 0;
2819         int ret;
2820
2821         if (tcph->rst) {
2822                 pkt_type = I40IW_PKT_TYPE_RST;
2823         } else if (tcph->syn) {
2824                 pkt_type = I40IW_PKT_TYPE_SYN;
2825                 if (tcph->ack)
2826                         pkt_type = I40IW_PKT_TYPE_SYNACK;
2827         } else if (tcph->ack) {
2828                 pkt_type = I40IW_PKT_TYPE_ACK;
2829         }
2830         if (tcph->fin)
2831                 fin_set = 1;
2832
2833         switch (pkt_type) {
2834         case I40IW_PKT_TYPE_SYN:
2835                 i40iw_handle_syn_pkt(cm_node, rbuf);
2836                 break;
2837         case I40IW_PKT_TYPE_SYNACK:
2838                 i40iw_handle_synack_pkt(cm_node, rbuf);
2839                 break;
2840         case I40IW_PKT_TYPE_ACK:
2841                 ret = i40iw_handle_ack_pkt(cm_node, rbuf);
2842                 if (fin_set && !ret)
2843                         i40iw_handle_fin_pkt(cm_node);
2844                 break;
2845         case I40IW_PKT_TYPE_RST:
2846                 i40iw_handle_rst_pkt(cm_node, rbuf);
2847                 break;
2848         default:
2849                 if (fin_set &&
2850                     (!i40iw_check_seq(cm_node, (struct tcphdr *)rbuf->tcph)))
2851                         i40iw_handle_fin_pkt(cm_node);
2852                 break;
2853         }
2854 }
2855
2856 /**
2857  * i40iw_make_listen_node - create a listen node with params
2858  * @cm_core: cm's core
2859  * @iwdev: iwarp device structure
2860  * @cm_info: quad info for connection
2861  */
2862 static struct i40iw_cm_listener *i40iw_make_listen_node(
2863                                         struct i40iw_cm_core *cm_core,
2864                                         struct i40iw_device *iwdev,
2865                                         struct i40iw_cm_info *cm_info)
2866 {
2867         struct i40iw_cm_listener *listener;
2868         unsigned long flags;
2869
2870         /* cannot have multiple matching listeners */
2871         listener = i40iw_find_listener(cm_core, cm_info->loc_addr,
2872                                        cm_info->loc_port,
2873                                        cm_info->vlan_id,
2874                                        I40IW_CM_LISTENER_EITHER_STATE);
2875         if (listener &&
2876             (listener->listener_state == I40IW_CM_LISTENER_ACTIVE_STATE)) {
2877                 atomic_dec(&listener->ref_count);
2878                 i40iw_debug(cm_core->dev,
2879                             I40IW_DEBUG_CM,
2880                             "Not creating listener since it already exists\n");
2881                 return NULL;
2882         }
2883
2884         if (!listener) {
2885                 /* create a CM listen node (1/2 node to compare incoming traffic to) */
2886                 listener = kzalloc(sizeof(*listener), GFP_KERNEL);
2887                 if (!listener)
2888                         return NULL;
2889                 cm_core->stats_listen_nodes_created++;
2890                 memcpy(listener->loc_addr, cm_info->loc_addr, sizeof(listener->loc_addr));
2891                 listener->loc_port = cm_info->loc_port;
2892
2893                 INIT_LIST_HEAD(&listener->child_listen_list);
2894
2895                 atomic_set(&listener->ref_count, 1);
2896         } else {
2897                 listener->reused_node = 1;
2898         }
2899
2900         listener->cm_id = cm_info->cm_id;
2901         listener->ipv4 = cm_info->ipv4;
2902         listener->vlan_id = cm_info->vlan_id;
2903         atomic_set(&listener->pend_accepts_cnt, 0);
2904         listener->cm_core = cm_core;
2905         listener->iwdev = iwdev;
2906
2907         listener->backlog = cm_info->backlog;
2908         listener->listener_state = I40IW_CM_LISTENER_ACTIVE_STATE;
2909
2910         if (!listener->reused_node) {
2911                 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2912                 list_add(&listener->list, &cm_core->listen_nodes);
2913                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2914         }
2915
2916         return listener;
2917 }
2918
2919 /**
2920  * i40iw_create_cm_node - make a connection node with params
2921  * @cm_core: cm's core
2922  * @iwdev: iwarp device structure
2923  * @conn_param: upper layer connection parameters
2924  * @cm_info: quad info for connection
2925  */
2926 static struct i40iw_cm_node *i40iw_create_cm_node(
2927                                         struct i40iw_cm_core *cm_core,
2928                                         struct i40iw_device *iwdev,
2929                                         struct iw_cm_conn_param *conn_param,
2930                                         struct i40iw_cm_info *cm_info)
2931 {
2932         struct i40iw_cm_node *cm_node;
2933         struct i40iw_cm_listener *loopback_remotelistener;
2934         struct i40iw_cm_node *loopback_remotenode;
2935         struct i40iw_cm_info loopback_cm_info;
2936
2937         u16 private_data_len = conn_param->private_data_len;
2938         const void *private_data = conn_param->private_data;
2939
2940         /* create a CM connection node */
2941         cm_node = i40iw_make_cm_node(cm_core, iwdev, cm_info, NULL);
2942         if (!cm_node)
2943                 return ERR_PTR(-ENOMEM);
2944         /* set our node side to client (active) side */
2945         cm_node->tcp_cntxt.client = 1;
2946         cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE;
2947
2948         i40iw_record_ird_ord(cm_node, conn_param->ird, conn_param->ord);
2949
2950         if (!memcmp(cm_info->loc_addr, cm_info->rem_addr, sizeof(cm_info->loc_addr))) {
2951                 loopback_remotelistener = i40iw_find_listener(
2952                                                 cm_core,
2953                                                 cm_info->rem_addr,
2954                                                 cm_node->rem_port,
2955                                                 cm_node->vlan_id,
2956                                                 I40IW_CM_LISTENER_ACTIVE_STATE);
2957                 if (!loopback_remotelistener) {
2958                         i40iw_rem_ref_cm_node(cm_node);
2959                         return ERR_PTR(-ECONNREFUSED);
2960                 } else {
2961                         loopback_cm_info = *cm_info;
2962                         loopback_cm_info.loc_port = cm_info->rem_port;
2963                         loopback_cm_info.rem_port = cm_info->loc_port;
2964                         loopback_cm_info.cm_id = loopback_remotelistener->cm_id;
2965                         loopback_cm_info.ipv4 = cm_info->ipv4;
2966                         loopback_remotenode = i40iw_make_cm_node(cm_core,
2967                                                                  iwdev,
2968                                                                  &loopback_cm_info,
2969                                                                  loopback_remotelistener);
2970                         if (!loopback_remotenode) {
2971                                 i40iw_rem_ref_cm_node(cm_node);
2972                                 return ERR_PTR(-ENOMEM);
2973                         }
2974                         cm_core->stats_loopbacks++;
2975                         loopback_remotenode->loopbackpartner = cm_node;
2976                         loopback_remotenode->tcp_cntxt.rcv_wscale =
2977                                 I40IW_CM_DEFAULT_RCV_WND_SCALE;
2978                         cm_node->loopbackpartner = loopback_remotenode;
2979                         memcpy(loopback_remotenode->pdata_buf, private_data,
2980                                private_data_len);
2981                         loopback_remotenode->pdata.size = private_data_len;
2982
2983                         if (loopback_remotenode->ord_size > cm_node->ird_size)
2984                                 loopback_remotenode->ord_size =
2985                                         cm_node->ird_size;
2986
2987                         cm_node->state = I40IW_CM_STATE_OFFLOADED;
2988                         cm_node->tcp_cntxt.rcv_nxt =
2989                                 loopback_remotenode->tcp_cntxt.loc_seq_num;
2990                         loopback_remotenode->tcp_cntxt.rcv_nxt =
2991                                 cm_node->tcp_cntxt.loc_seq_num;
2992                         cm_node->tcp_cntxt.max_snd_wnd =
2993                                 loopback_remotenode->tcp_cntxt.rcv_wnd;
2994                         loopback_remotenode->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
2995                         cm_node->tcp_cntxt.snd_wnd = loopback_remotenode->tcp_cntxt.rcv_wnd;
2996                         loopback_remotenode->tcp_cntxt.snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
2997                         cm_node->tcp_cntxt.snd_wscale = loopback_remotenode->tcp_cntxt.rcv_wscale;
2998                         loopback_remotenode->tcp_cntxt.snd_wscale = cm_node->tcp_cntxt.rcv_wscale;
2999                 }
3000                 return cm_node;
3001         }
3002
3003         cm_node->pdata.size = private_data_len;
3004         cm_node->pdata.addr = cm_node->pdata_buf;
3005
3006         memcpy(cm_node->pdata_buf, private_data, private_data_len);
3007
3008         cm_node->state = I40IW_CM_STATE_SYN_SENT;
3009         return cm_node;
3010 }
3011
3012 /**
3013  * i40iw_cm_reject - reject and teardown a connection
3014  * @cm_node: connection's node
3015  * @pdate: ptr to private data for reject
3016  * @plen: size of private data
3017  */
3018 static int i40iw_cm_reject(struct i40iw_cm_node *cm_node, const void *pdata, u8 plen)
3019 {
3020         int ret = 0;
3021         int err;
3022         int passive_state;
3023         struct iw_cm_id *cm_id = cm_node->cm_id;
3024         struct i40iw_cm_node *loopback = cm_node->loopbackpartner;
3025
3026         if (cm_node->tcp_cntxt.client)
3027                 return ret;
3028         i40iw_cleanup_retrans_entry(cm_node);
3029
3030         if (!loopback) {
3031                 passive_state = atomic_add_return(1, &cm_node->passive_state);
3032                 if (passive_state == I40IW_SEND_RESET_EVENT) {
3033                         cm_node->state = I40IW_CM_STATE_CLOSED;
3034                         i40iw_rem_ref_cm_node(cm_node);
3035                 } else {
3036                         if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
3037                                 i40iw_rem_ref_cm_node(cm_node);
3038                         } else {
3039                                 ret = i40iw_send_mpa_reject(cm_node, pdata, plen);
3040                                 if (ret) {
3041                                         cm_node->state = I40IW_CM_STATE_CLOSED;
3042                                         err = i40iw_send_reset(cm_node);
3043                                         if (err)
3044                                                 i40iw_pr_err("send reset failed\n");
3045                                 } else {
3046                                         cm_id->add_ref(cm_id);
3047                                 }
3048                         }
3049                 }
3050         } else {
3051                 cm_node->cm_id = NULL;
3052                 if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
3053                         i40iw_rem_ref_cm_node(cm_node);
3054                         i40iw_rem_ref_cm_node(loopback);
3055                 } else {
3056                         ret = i40iw_send_cm_event(loopback,
3057                                                   loopback->cm_id,
3058                                                   IW_CM_EVENT_CONNECT_REPLY,
3059                                                   -ECONNREFUSED);
3060                         i40iw_rem_ref_cm_node(cm_node);
3061                         loopback->state = I40IW_CM_STATE_CLOSING;
3062
3063                         cm_id = loopback->cm_id;
3064                         i40iw_rem_ref_cm_node(loopback);
3065                         cm_id->rem_ref(cm_id);
3066                 }
3067         }
3068
3069         return ret;
3070 }
3071
3072 /**
3073  * i40iw_cm_close - close of cm connection
3074  * @cm_node: connection's node
3075  */
3076 static int i40iw_cm_close(struct i40iw_cm_node *cm_node)
3077 {
3078         int ret = 0;
3079
3080         if (!cm_node)
3081                 return -EINVAL;
3082
3083         switch (cm_node->state) {
3084         case I40IW_CM_STATE_SYN_RCVD:
3085         case I40IW_CM_STATE_SYN_SENT:
3086         case I40IW_CM_STATE_ONE_SIDE_ESTABLISHED:
3087         case I40IW_CM_STATE_ESTABLISHED:
3088         case I40IW_CM_STATE_ACCEPTING:
3089         case I40IW_CM_STATE_MPAREQ_SENT:
3090         case I40IW_CM_STATE_MPAREQ_RCVD:
3091                 i40iw_cleanup_retrans_entry(cm_node);
3092                 i40iw_send_reset(cm_node);
3093                 break;
3094         case I40IW_CM_STATE_CLOSE_WAIT:
3095                 cm_node->state = I40IW_CM_STATE_LAST_ACK;
3096                 i40iw_send_fin(cm_node);
3097                 break;
3098         case I40IW_CM_STATE_FIN_WAIT1:
3099         case I40IW_CM_STATE_FIN_WAIT2:
3100         case I40IW_CM_STATE_LAST_ACK:
3101         case I40IW_CM_STATE_TIME_WAIT:
3102         case I40IW_CM_STATE_CLOSING:
3103                 ret = -1;
3104                 break;
3105         case I40IW_CM_STATE_LISTENING:
3106                 i40iw_cleanup_retrans_entry(cm_node);
3107                 i40iw_send_reset(cm_node);
3108                 break;
3109         case I40IW_CM_STATE_MPAREJ_RCVD:
3110         case I40IW_CM_STATE_UNKNOWN:
3111         case I40IW_CM_STATE_INITED:
3112         case I40IW_CM_STATE_CLOSED:
3113         case I40IW_CM_STATE_LISTENER_DESTROYED:
3114                 i40iw_rem_ref_cm_node(cm_node);
3115                 break;
3116         case I40IW_CM_STATE_OFFLOADED:
3117                 if (cm_node->send_entry)
3118                         i40iw_pr_err("send_entry\n");
3119                 i40iw_rem_ref_cm_node(cm_node);
3120                 break;
3121         }
3122         return ret;
3123 }
3124
3125 /**
3126  * i40iw_receive_ilq - recv an ETHERNET packet, and process it
3127  * through CM
3128  * @vsi: pointer to the vsi structure
3129  * @rbuf: receive buffer
3130  */
3131 void i40iw_receive_ilq(struct i40iw_sc_vsi *vsi, struct i40iw_puda_buf *rbuf)
3132 {
3133         struct i40iw_cm_node *cm_node;
3134         struct i40iw_cm_listener *listener;
3135         struct iphdr *iph;
3136         struct ipv6hdr *ip6h;
3137         struct tcphdr *tcph;
3138         struct i40iw_cm_info cm_info;
3139         struct i40iw_sc_dev *dev = vsi->dev;
3140         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
3141         struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3142         struct vlan_ethhdr *ethh;
3143         u16 vtag;
3144
3145         /* if vlan, then maclen = 18 else 14 */
3146         iph = (struct iphdr *)rbuf->iph;
3147         memset(&cm_info, 0, sizeof(cm_info));
3148
3149         i40iw_debug_buf(dev,
3150                         I40IW_DEBUG_ILQ,
3151                         "RECEIVE ILQ BUFFER",
3152                         rbuf->mem.va,
3153                         rbuf->totallen);
3154         ethh = (struct vlan_ethhdr *)rbuf->mem.va;
3155
3156         if (ethh->h_vlan_proto == htons(ETH_P_8021Q)) {
3157                 vtag = ntohs(ethh->h_vlan_TCI);
3158                 cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
3159                 cm_info.vlan_id = vtag & VLAN_VID_MASK;
3160                 i40iw_debug(cm_core->dev,
3161                             I40IW_DEBUG_CM,
3162                             "%s vlan_id=%d\n",
3163                             __func__,
3164                             cm_info.vlan_id);
3165         } else {
3166                 cm_info.vlan_id = I40IW_NO_VLAN;
3167         }
3168         tcph = (struct tcphdr *)rbuf->tcph;
3169
3170         if (rbuf->ipv4) {
3171                 cm_info.loc_addr[0] = ntohl(iph->daddr);
3172                 cm_info.rem_addr[0] = ntohl(iph->saddr);
3173                 cm_info.ipv4 = true;
3174                 cm_info.tos = iph->tos;
3175         } else {
3176                 ip6h = (struct ipv6hdr *)rbuf->iph;
3177                 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3178                                     ip6h->daddr.in6_u.u6_addr32);
3179                 i40iw_copy_ip_ntohl(cm_info.rem_addr,
3180                                     ip6h->saddr.in6_u.u6_addr32);
3181                 cm_info.ipv4 = false;
3182                 cm_info.tos = (ip6h->priority << 4) | (ip6h->flow_lbl[0] >> 4);
3183         }
3184         cm_info.loc_port = ntohs(tcph->dest);
3185         cm_info.rem_port = ntohs(tcph->source);
3186         cm_node = i40iw_find_node(cm_core,
3187                                   cm_info.rem_port,
3188                                   cm_info.rem_addr,
3189                                   cm_info.loc_port,
3190                                   cm_info.loc_addr,
3191                                   true,
3192                                   false);
3193
3194         if (!cm_node) {
3195                 /* Only type of packet accepted are for */
3196                 /* the PASSIVE open (syn only) */
3197                 if (!tcph->syn || tcph->ack)
3198                         return;
3199                 listener =
3200                     i40iw_find_listener(cm_core,
3201                                         cm_info.loc_addr,
3202                                         cm_info.loc_port,
3203                                         cm_info.vlan_id,
3204                                         I40IW_CM_LISTENER_ACTIVE_STATE);
3205                 if (!listener) {
3206                         cm_info.cm_id = NULL;
3207                         i40iw_debug(cm_core->dev,
3208                                     I40IW_DEBUG_CM,
3209                                     "%s no listener found\n",
3210                                     __func__);
3211                         return;
3212                 }
3213                 cm_info.cm_id = listener->cm_id;
3214                 cm_node = i40iw_make_cm_node(cm_core, iwdev, &cm_info, listener);
3215                 if (!cm_node) {
3216                         i40iw_debug(cm_core->dev,
3217                                     I40IW_DEBUG_CM,
3218                                     "%s allocate node failed\n",
3219                                     __func__);
3220                         atomic_dec(&listener->ref_count);
3221                         return;
3222                 }
3223                 if (!tcph->rst && !tcph->fin) {
3224                         cm_node->state = I40IW_CM_STATE_LISTENING;
3225                 } else {
3226                         i40iw_rem_ref_cm_node(cm_node);
3227                         return;
3228                 }
3229                 atomic_inc(&cm_node->ref_count);
3230         } else if (cm_node->state == I40IW_CM_STATE_OFFLOADED) {
3231                 i40iw_rem_ref_cm_node(cm_node);
3232                 return;
3233         }
3234         i40iw_process_packet(cm_node, rbuf);
3235         i40iw_rem_ref_cm_node(cm_node);
3236 }
3237
3238 /**
3239  * i40iw_setup_cm_core - allocate a top level instance of a cm
3240  * core
3241  * @iwdev: iwarp device structure
3242  */
3243 int i40iw_setup_cm_core(struct i40iw_device *iwdev)
3244 {
3245         struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3246
3247         cm_core->iwdev = iwdev;
3248         cm_core->dev = &iwdev->sc_dev;
3249
3250         INIT_LIST_HEAD(&cm_core->accelerated_list);
3251         INIT_LIST_HEAD(&cm_core->non_accelerated_list);
3252         INIT_LIST_HEAD(&cm_core->listen_nodes);
3253
3254         timer_setup(&cm_core->tcp_timer, i40iw_cm_timer_tick, 0);
3255
3256         spin_lock_init(&cm_core->ht_lock);
3257         spin_lock_init(&cm_core->listen_list_lock);
3258         spin_lock_init(&cm_core->apbvt_lock);
3259
3260         cm_core->event_wq = alloc_ordered_workqueue("iwewq",
3261                                                     WQ_MEM_RECLAIM);
3262         if (!cm_core->event_wq)
3263                 goto error;
3264
3265         cm_core->disconn_wq = alloc_ordered_workqueue("iwdwq",
3266                                                       WQ_MEM_RECLAIM);
3267         if (!cm_core->disconn_wq)
3268                 goto error;
3269
3270         return 0;
3271 error:
3272         i40iw_cleanup_cm_core(&iwdev->cm_core);
3273
3274         return -ENOMEM;
3275 }
3276
3277 /**
3278  * i40iw_cleanup_cm_core - deallocate a top level instance of a
3279  * cm core
3280  * @cm_core: cm's core
3281  */
3282 void i40iw_cleanup_cm_core(struct i40iw_cm_core *cm_core)
3283 {
3284         unsigned long flags;
3285
3286         if (!cm_core)
3287                 return;
3288
3289         spin_lock_irqsave(&cm_core->ht_lock, flags);
3290         if (timer_pending(&cm_core->tcp_timer))
3291                 del_timer_sync(&cm_core->tcp_timer);
3292         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
3293
3294         if (cm_core->event_wq)
3295                 destroy_workqueue(cm_core->event_wq);
3296         if (cm_core->disconn_wq)
3297                 destroy_workqueue(cm_core->disconn_wq);
3298 }
3299
3300 /**
3301  * i40iw_init_tcp_ctx - setup qp context
3302  * @cm_node: connection's node
3303  * @tcp_info: offload info for tcp
3304  * @iwqp: associate qp for the connection
3305  */
3306 static void i40iw_init_tcp_ctx(struct i40iw_cm_node *cm_node,
3307                                struct i40iw_tcp_offload_info *tcp_info,
3308                                struct i40iw_qp *iwqp)
3309 {
3310         tcp_info->ipv4 = cm_node->ipv4;
3311         tcp_info->drop_ooo_seg = true;
3312         tcp_info->wscale = true;
3313         tcp_info->ignore_tcp_opt = true;
3314         tcp_info->ignore_tcp_uns_opt = true;
3315         tcp_info->no_nagle = false;
3316
3317         tcp_info->ttl = I40IW_DEFAULT_TTL;
3318         tcp_info->rtt_var = cpu_to_le32(I40IW_DEFAULT_RTT_VAR);
3319         tcp_info->ss_thresh = cpu_to_le32(I40IW_DEFAULT_SS_THRESH);
3320         tcp_info->rexmit_thresh = I40IW_DEFAULT_REXMIT_THRESH;
3321
3322         tcp_info->tcp_state = I40IW_TCP_STATE_ESTABLISHED;
3323         tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale;
3324         tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale;
3325
3326         tcp_info->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3327         tcp_info->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
3328         tcp_info->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
3329         tcp_info->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3330
3331         tcp_info->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3332         tcp_info->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss);
3333         tcp_info->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
3334         tcp_info->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3335         tcp_info->max_snd_window = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
3336         tcp_info->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
3337                                         cm_node->tcp_cntxt.rcv_wscale);
3338
3339         tcp_info->flow_label = 0;
3340         tcp_info->snd_mss = cpu_to_le32(((u32)cm_node->tcp_cntxt.mss));
3341         if (cm_node->vlan_id <= VLAN_VID_MASK) {
3342                 tcp_info->insert_vlan_tag = true;
3343                 tcp_info->vlan_tag = cpu_to_le16(((u16)cm_node->user_pri << I40IW_VLAN_PRIO_SHIFT) |
3344                                                   cm_node->vlan_id);
3345         }
3346         if (cm_node->ipv4) {
3347                 tcp_info->src_port = cpu_to_le16(cm_node->loc_port);
3348                 tcp_info->dst_port = cpu_to_le16(cm_node->rem_port);
3349
3350                 tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[0]);
3351                 tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[0]);
3352                 tcp_info->arp_idx =
3353                         cpu_to_le16((u16)i40iw_arp_table(
3354                                                          iwqp->iwdev,
3355                                                          &tcp_info->dest_ip_addr3,
3356                                                          true,
3357                                                          NULL,
3358                                                          I40IW_ARP_RESOLVE));
3359         } else {
3360                 tcp_info->src_port = cpu_to_le16(cm_node->loc_port);
3361                 tcp_info->dst_port = cpu_to_le16(cm_node->rem_port);
3362                 tcp_info->dest_ip_addr0 = cpu_to_le32(cm_node->rem_addr[0]);
3363                 tcp_info->dest_ip_addr1 = cpu_to_le32(cm_node->rem_addr[1]);
3364                 tcp_info->dest_ip_addr2 = cpu_to_le32(cm_node->rem_addr[2]);
3365                 tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[3]);
3366                 tcp_info->local_ipaddr0 = cpu_to_le32(cm_node->loc_addr[0]);
3367                 tcp_info->local_ipaddr1 = cpu_to_le32(cm_node->loc_addr[1]);
3368                 tcp_info->local_ipaddr2 = cpu_to_le32(cm_node->loc_addr[2]);
3369                 tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[3]);
3370                 tcp_info->arp_idx =
3371                         cpu_to_le16((u16)i40iw_arp_table(
3372                                                          iwqp->iwdev,
3373                                                          &tcp_info->dest_ip_addr0,
3374                                                          false,
3375                                                          NULL,
3376                                                          I40IW_ARP_RESOLVE));
3377         }
3378 }
3379
3380 /**
3381  * i40iw_cm_init_tsa_conn - setup qp for RTS
3382  * @iwqp: associate qp for the connection
3383  * @cm_node: connection's node
3384  */
3385 static void i40iw_cm_init_tsa_conn(struct i40iw_qp *iwqp,
3386                                    struct i40iw_cm_node *cm_node)
3387 {
3388         struct i40iw_tcp_offload_info tcp_info;
3389         struct i40iwarp_offload_info *iwarp_info;
3390         struct i40iw_qp_host_ctx_info *ctx_info;
3391         struct i40iw_device *iwdev = iwqp->iwdev;
3392         struct i40iw_sc_dev *dev = &iwqp->iwdev->sc_dev;
3393
3394         memset(&tcp_info, 0x00, sizeof(struct i40iw_tcp_offload_info));
3395         iwarp_info = &iwqp->iwarp_info;
3396         ctx_info = &iwqp->ctx_info;
3397
3398         ctx_info->tcp_info = &tcp_info;
3399         ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id;
3400         ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id;
3401
3402         iwarp_info->ord_size = cm_node->ord_size;
3403         iwarp_info->ird_size = i40iw_derive_hw_ird_setting(cm_node->ird_size);
3404
3405         if (iwarp_info->ord_size == 1)
3406                 iwarp_info->ord_size = 2;
3407
3408         iwarp_info->rd_enable = true;
3409         iwarp_info->rdmap_ver = 1;
3410         iwarp_info->ddp_ver = 1;
3411
3412         iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id;
3413
3414         ctx_info->tcp_info_valid = true;
3415         ctx_info->iwarp_info_valid = true;
3416         ctx_info->add_to_qoslist = true;
3417         ctx_info->user_pri = cm_node->user_pri;
3418
3419         i40iw_init_tcp_ctx(cm_node, &tcp_info, iwqp);
3420         if (cm_node->snd_mark_en) {
3421                 iwarp_info->snd_mark_en = true;
3422                 iwarp_info->snd_mark_offset = (tcp_info.snd_nxt &
3423                                 SNDMARKER_SEQNMASK) + cm_node->lsmm_size;
3424         }
3425
3426         cm_node->state = I40IW_CM_STATE_OFFLOADED;
3427         tcp_info.tcp_state = I40IW_TCP_STATE_ESTABLISHED;
3428         tcp_info.src_mac_addr_idx = iwdev->mac_ip_table_idx;
3429         tcp_info.tos = cm_node->tos;
3430
3431         dev->iw_priv_qp_ops->qp_setctx(&iwqp->sc_qp, (u64 *)(iwqp->host_ctx.va), ctx_info);
3432
3433         /* once tcp_info is set, no need to do it again */
3434         ctx_info->tcp_info_valid = false;
3435         ctx_info->iwarp_info_valid = false;
3436         ctx_info->add_to_qoslist = false;
3437 }
3438
3439 /**
3440  * i40iw_cm_disconn - when a connection is being closed
3441  * @iwqp: associate qp for the connection
3442  */
3443 void i40iw_cm_disconn(struct i40iw_qp *iwqp)
3444 {
3445         struct disconn_work *work;
3446         struct i40iw_device *iwdev = iwqp->iwdev;
3447         struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3448         unsigned long flags;
3449
3450         work = kzalloc(sizeof(*work), GFP_ATOMIC);
3451         if (!work)
3452                 return; /* Timer will clean up */
3453
3454         spin_lock_irqsave(&iwdev->qptable_lock, flags);
3455         if (!iwdev->qp_table[iwqp->ibqp.qp_num]) {
3456                 spin_unlock_irqrestore(&iwdev->qptable_lock, flags);
3457                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM,
3458                             "%s qp_id %d is already freed\n",
3459                              __func__, iwqp->ibqp.qp_num);
3460                 kfree(work);
3461                 return;
3462         }
3463         i40iw_add_ref(&iwqp->ibqp);
3464         spin_unlock_irqrestore(&iwdev->qptable_lock, flags);
3465
3466         work->iwqp = iwqp;
3467         INIT_WORK(&work->work, i40iw_disconnect_worker);
3468         queue_work(cm_core->disconn_wq, &work->work);
3469         return;
3470 }
3471
3472 /**
3473  * i40iw_qp_disconnect - free qp and close cm
3474  * @iwqp: associate qp for the connection
3475  */
3476 static void i40iw_qp_disconnect(struct i40iw_qp *iwqp)
3477 {
3478         struct i40iw_device *iwdev;
3479         struct i40iw_ib_device *iwibdev;
3480
3481         iwdev = to_iwdev(iwqp->ibqp.device);
3482         if (!iwdev) {
3483                 i40iw_pr_err("iwdev == NULL\n");
3484                 return;
3485         }
3486
3487         iwibdev = iwdev->iwibdev;
3488
3489         if (iwqp->active_conn) {
3490                 /* indicate this connection is NOT active */
3491                 iwqp->active_conn = 0;
3492         } else {
3493                 /* Need to free the Last Streaming Mode Message */
3494                 if (iwqp->ietf_mem.va) {
3495                         if (iwqp->lsmm_mr)
3496                                 iwibdev->ibdev.ops.dereg_mr(iwqp->lsmm_mr,
3497                                                             NULL);
3498                         i40iw_free_dma_mem(iwdev->sc_dev.hw, &iwqp->ietf_mem);
3499                 }
3500         }
3501
3502         /* close the CM node down if it is still active */
3503         if (iwqp->cm_node) {
3504                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "%s Call close API\n", __func__);
3505                 i40iw_cm_close(iwqp->cm_node);
3506         }
3507 }
3508
3509 /**
3510  * i40iw_cm_disconn_true - called by worker thread to disconnect qp
3511  * @iwqp: associate qp for the connection
3512  */
3513 static void i40iw_cm_disconn_true(struct i40iw_qp *iwqp)
3514 {
3515         struct iw_cm_id *cm_id;
3516         struct i40iw_device *iwdev;
3517         struct i40iw_sc_qp *qp = &iwqp->sc_qp;
3518         u16 last_ae;
3519         u8 original_hw_tcp_state;
3520         u8 original_ibqp_state;
3521         int disconn_status = 0;
3522         int issue_disconn = 0;
3523         int issue_close = 0;
3524         int issue_flush = 0;
3525         struct ib_event ibevent;
3526         unsigned long flags;
3527         int ret;
3528
3529         if (!iwqp) {
3530                 i40iw_pr_err("iwqp == NULL\n");
3531                 return;
3532         }
3533
3534         spin_lock_irqsave(&iwqp->lock, flags);
3535         cm_id = iwqp->cm_id;
3536         /* make sure we havent already closed this connection */
3537         if (!cm_id) {
3538                 spin_unlock_irqrestore(&iwqp->lock, flags);
3539                 return;
3540         }
3541
3542         iwdev = to_iwdev(iwqp->ibqp.device);
3543
3544         original_hw_tcp_state = iwqp->hw_tcp_state;
3545         original_ibqp_state = iwqp->ibqp_state;
3546         last_ae = iwqp->last_aeq;
3547
3548         if (qp->term_flags) {
3549                 issue_disconn = 1;
3550                 issue_close = 1;
3551                 iwqp->cm_id = NULL;
3552                 /*When term timer expires after cm_timer, don't want
3553                  *terminate-handler to issue cm_disconn which can re-free
3554                  *a QP even after its refcnt=0.
3555                  */
3556                 i40iw_terminate_del_timer(qp);
3557                 if (!iwqp->flush_issued) {
3558                         iwqp->flush_issued = 1;
3559                         issue_flush = 1;
3560                 }
3561         } else if ((original_hw_tcp_state == I40IW_TCP_STATE_CLOSE_WAIT) ||
3562                    ((original_ibqp_state == IB_QPS_RTS) &&
3563                     (last_ae == I40IW_AE_LLP_CONNECTION_RESET))) {
3564                 issue_disconn = 1;
3565                 if (last_ae == I40IW_AE_LLP_CONNECTION_RESET)
3566                         disconn_status = -ECONNRESET;
3567         }
3568
3569         if (((original_hw_tcp_state == I40IW_TCP_STATE_CLOSED) ||
3570              (original_hw_tcp_state == I40IW_TCP_STATE_TIME_WAIT) ||
3571              (last_ae == I40IW_AE_RDMAP_ROE_BAD_LLP_CLOSE) ||
3572              (last_ae == I40IW_AE_LLP_CONNECTION_RESET) ||
3573               iwdev->reset)) {
3574                 issue_close = 1;
3575                 iwqp->cm_id = NULL;
3576                 if (!iwqp->flush_issued) {
3577                         iwqp->flush_issued = 1;
3578                         issue_flush = 1;
3579                 }
3580         }
3581
3582         spin_unlock_irqrestore(&iwqp->lock, flags);
3583         if (issue_flush && !iwqp->destroyed) {
3584                 /* Flush the queues */
3585                 i40iw_flush_wqes(iwdev, iwqp);
3586
3587                 if (qp->term_flags && iwqp->ibqp.event_handler) {
3588                         ibevent.device = iwqp->ibqp.device;
3589                         ibevent.event = (qp->eventtype == TERM_EVENT_QP_FATAL) ?
3590                                         IB_EVENT_QP_FATAL : IB_EVENT_QP_ACCESS_ERR;
3591                         ibevent.element.qp = &iwqp->ibqp;
3592                         iwqp->ibqp.event_handler(&ibevent, iwqp->ibqp.qp_context);
3593                 }
3594         }
3595
3596         if (cm_id && cm_id->event_handler) {
3597                 if (issue_disconn) {
3598                         ret = i40iw_send_cm_event(NULL,
3599                                                   cm_id,
3600                                                   IW_CM_EVENT_DISCONNECT,
3601                                                   disconn_status);
3602
3603                         if (ret)
3604                                 i40iw_debug(&iwdev->sc_dev,
3605                                             I40IW_DEBUG_CM,
3606                                             "disconnect event failed %s: - cm_id = %p\n",
3607                                             __func__, cm_id);
3608                 }
3609                 if (issue_close) {
3610                         i40iw_qp_disconnect(iwqp);
3611                         cm_id->provider_data = iwqp;
3612                         ret = i40iw_send_cm_event(NULL, cm_id, IW_CM_EVENT_CLOSE, 0);
3613                         if (ret)
3614                                 i40iw_debug(&iwdev->sc_dev,
3615                                             I40IW_DEBUG_CM,
3616                                             "close event failed %s: - cm_id = %p\n",
3617                                             __func__, cm_id);
3618                         cm_id->rem_ref(cm_id);
3619                 }
3620         }
3621 }
3622
3623 /**
3624  * i40iw_disconnect_worker - worker for connection close
3625  * @work: points or disconn structure
3626  */
3627 static void i40iw_disconnect_worker(struct work_struct *work)
3628 {
3629         struct disconn_work *dwork = container_of(work, struct disconn_work, work);
3630         struct i40iw_qp *iwqp = dwork->iwqp;
3631
3632         kfree(dwork);
3633         i40iw_cm_disconn_true(iwqp);
3634         i40iw_rem_ref(&iwqp->ibqp);
3635 }
3636
3637 /**
3638  * i40iw_accept - registered call for connection to be accepted
3639  * @cm_id: cm information for passive connection
3640  * @conn_param: accpet parameters
3641  */
3642 int i40iw_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3643 {
3644         struct ib_qp *ibqp;
3645         struct i40iw_qp *iwqp;
3646         struct i40iw_device *iwdev;
3647         struct i40iw_sc_dev *dev;
3648         struct i40iw_cm_core *cm_core;
3649         struct i40iw_cm_node *cm_node;
3650         struct ib_qp_attr attr;
3651         int passive_state;
3652         struct ib_mr *ibmr;
3653         struct i40iw_pd *iwpd;
3654         u16 buf_len = 0;
3655         struct i40iw_kmem_info accept;
3656         enum i40iw_status_code status;
3657         u64 tagged_offset;
3658         unsigned long flags;
3659
3660         memset(&attr, 0, sizeof(attr));
3661         ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn);
3662         if (!ibqp)
3663                 return -EINVAL;
3664
3665         iwqp = to_iwqp(ibqp);
3666         iwdev = iwqp->iwdev;
3667         dev = &iwdev->sc_dev;
3668         cm_core = &iwdev->cm_core;
3669         cm_node = (struct i40iw_cm_node *)cm_id->provider_data;
3670
3671         if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) {
3672                 cm_node->ipv4 = true;
3673                 cm_node->vlan_id = i40iw_get_vlan_ipv4(cm_node->loc_addr);
3674         } else {
3675                 cm_node->ipv4 = false;
3676                 i40iw_netdev_vlan_ipv6(cm_node->loc_addr, &cm_node->vlan_id);
3677         }
3678         i40iw_debug(cm_node->dev,
3679                     I40IW_DEBUG_CM,
3680                     "Accept vlan_id=%d\n",
3681                     cm_node->vlan_id);
3682         if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
3683                 if (cm_node->loopbackpartner)
3684                         i40iw_rem_ref_cm_node(cm_node->loopbackpartner);
3685                 i40iw_rem_ref_cm_node(cm_node);
3686                 return -EINVAL;
3687         }
3688
3689         passive_state = atomic_add_return(1, &cm_node->passive_state);
3690         if (passive_state == I40IW_SEND_RESET_EVENT) {
3691                 i40iw_rem_ref_cm_node(cm_node);
3692                 return -ECONNRESET;
3693         }
3694
3695         cm_node->cm_core->stats_accepts++;
3696         iwqp->cm_node = (void *)cm_node;
3697         cm_node->iwqp = iwqp;
3698
3699         buf_len = conn_param->private_data_len + I40IW_MAX_IETF_SIZE;
3700
3701         status = i40iw_allocate_dma_mem(dev->hw, &iwqp->ietf_mem, buf_len, 1);
3702
3703         if (status)
3704                 return -ENOMEM;
3705         cm_node->pdata.size = conn_param->private_data_len;
3706         accept.addr = iwqp->ietf_mem.va;
3707         accept.size = i40iw_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY);
3708         memcpy(accept.addr + accept.size, conn_param->private_data,
3709                conn_param->private_data_len);
3710
3711         /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3712         if ((cm_node->ipv4 &&
3713              !i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
3714             (!cm_node->ipv4 &&
3715              !i40iw_ipv6_is_loopback(cm_node->loc_addr, cm_node->rem_addr))) {
3716                 iwpd = iwqp->iwpd;
3717                 tagged_offset = (uintptr_t)iwqp->ietf_mem.va;
3718                 ibmr = i40iw_reg_phys_mr(&iwpd->ibpd,
3719                                          iwqp->ietf_mem.pa,
3720                                          buf_len,
3721                                          IB_ACCESS_LOCAL_WRITE,
3722                                          &tagged_offset);
3723                 if (IS_ERR(ibmr)) {
3724                         i40iw_free_dma_mem(dev->hw, &iwqp->ietf_mem);
3725                         return -ENOMEM;
3726                 }
3727
3728                 ibmr->pd = &iwpd->ibpd;
3729                 ibmr->device = iwpd->ibpd.device;
3730                 iwqp->lsmm_mr = ibmr;
3731                 if (iwqp->page)
3732                         iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
3733                 dev->iw_priv_qp_ops->qp_send_lsmm(&iwqp->sc_qp,
3734                                                         iwqp->ietf_mem.va,
3735                                                         (accept.size + conn_param->private_data_len),
3736                                                         ibmr->lkey);
3737
3738         } else {
3739                 if (iwqp->page)
3740                         iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
3741                 dev->iw_priv_qp_ops->qp_send_lsmm(&iwqp->sc_qp, NULL, 0, 0);
3742         }
3743
3744         if (iwqp->page)
3745                 kunmap(iwqp->page);
3746
3747         iwqp->cm_id = cm_id;
3748         cm_node->cm_id = cm_id;
3749
3750         cm_id->provider_data = (void *)iwqp;
3751         iwqp->active_conn = 0;
3752
3753         cm_node->lsmm_size = accept.size + conn_param->private_data_len;
3754         i40iw_cm_init_tsa_conn(iwqp, cm_node);
3755         cm_id->add_ref(cm_id);
3756         i40iw_add_ref(&iwqp->ibqp);
3757
3758         attr.qp_state = IB_QPS_RTS;
3759         cm_node->qhash_set = false;
3760         i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
3761
3762         cm_node->accelerated = true;
3763         spin_lock_irqsave(&cm_core->ht_lock, flags);
3764         list_move_tail(&cm_node->list, &cm_core->accelerated_list);
3765         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
3766
3767         status =
3768                 i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0);
3769         if (status)
3770                 i40iw_debug(dev, I40IW_DEBUG_CM, "error sending cm event - ESTABLISHED\n");
3771
3772         if (cm_node->loopbackpartner) {
3773                 cm_node->loopbackpartner->pdata.size = conn_param->private_data_len;
3774
3775                 /* copy entire MPA frame to our cm_node's frame */
3776                 memcpy(cm_node->loopbackpartner->pdata_buf,
3777                        conn_param->private_data,
3778                        conn_param->private_data_len);
3779                 i40iw_create_event(cm_node->loopbackpartner, I40IW_CM_EVENT_CONNECTED);
3780         }
3781
3782         if (cm_node->accept_pend) {
3783                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
3784                 cm_node->accept_pend = 0;
3785         }
3786         return 0;
3787 }
3788
3789 /**
3790  * i40iw_reject - registered call for connection to be rejected
3791  * @cm_id: cm information for passive connection
3792  * @pdata: private data to be sent
3793  * @pdata_len: private data length
3794  */
3795 int i40iw_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3796 {
3797         struct i40iw_device *iwdev;
3798         struct i40iw_cm_node *cm_node;
3799         struct i40iw_cm_node *loopback;
3800
3801         cm_node = (struct i40iw_cm_node *)cm_id->provider_data;
3802         loopback = cm_node->loopbackpartner;
3803         cm_node->cm_id = cm_id;
3804         cm_node->pdata.size = pdata_len;
3805
3806         iwdev = to_iwdev(cm_id->device);
3807         if (!iwdev)
3808                 return -EINVAL;
3809         cm_node->cm_core->stats_rejects++;
3810
3811         if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER)
3812                 return -EINVAL;
3813
3814         if (loopback) {
3815                 memcpy(&loopback->pdata_buf, pdata, pdata_len);
3816                 loopback->pdata.size = pdata_len;
3817         }
3818
3819         return i40iw_cm_reject(cm_node, pdata, pdata_len);
3820 }
3821
3822 /**
3823  * i40iw_connect - registered call for connection to be established
3824  * @cm_id: cm information for passive connection
3825  * @conn_param: Information about the connection
3826  */
3827 int i40iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3828 {
3829         struct ib_qp *ibqp;
3830         struct i40iw_qp *iwqp;
3831         struct i40iw_device *iwdev;
3832         struct i40iw_cm_node *cm_node;
3833         struct i40iw_cm_info cm_info;
3834         struct sockaddr_in *laddr;
3835         struct sockaddr_in *raddr;
3836         struct sockaddr_in6 *laddr6;
3837         struct sockaddr_in6 *raddr6;
3838         int ret = 0;
3839
3840         ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn);
3841         if (!ibqp)
3842                 return -EINVAL;
3843         iwqp = to_iwqp(ibqp);
3844         if (!iwqp)
3845                 return -EINVAL;
3846         iwdev = to_iwdev(iwqp->ibqp.device);
3847         if (!iwdev)
3848                 return -EINVAL;
3849
3850         laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3851         raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
3852         laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3853         raddr6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr;
3854
3855         if (!(laddr->sin_port) || !(raddr->sin_port))
3856                 return -EINVAL;
3857
3858         iwqp->active_conn = 1;
3859         iwqp->cm_id = NULL;
3860         cm_id->provider_data = iwqp;
3861
3862         /* set up the connection params for the node */
3863         if (cm_id->remote_addr.ss_family == AF_INET) {
3864                 cm_info.ipv4 = true;
3865                 memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr));
3866                 memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr));
3867                 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3868                 cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr);
3869                 cm_info.loc_port = ntohs(laddr->sin_port);
3870                 cm_info.rem_port = ntohs(raddr->sin_port);
3871                 cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr);
3872         } else {
3873                 cm_info.ipv4 = false;
3874                 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3875                                     laddr6->sin6_addr.in6_u.u6_addr32);
3876                 i40iw_copy_ip_ntohl(cm_info.rem_addr,
3877                                     raddr6->sin6_addr.in6_u.u6_addr32);
3878                 cm_info.loc_port = ntohs(laddr6->sin6_port);
3879                 cm_info.rem_port = ntohs(raddr6->sin6_port);
3880                 i40iw_netdev_vlan_ipv6(cm_info.loc_addr, &cm_info.vlan_id);
3881         }
3882         cm_info.cm_id = cm_id;
3883         cm_info.tos = cm_id->tos;
3884         cm_info.user_pri = rt_tos2priority(cm_id->tos);
3885         i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB, "%s TOS:[%d] UP:[%d]\n",
3886                     __func__, cm_id->tos, cm_info.user_pri);
3887         cm_id->add_ref(cm_id);
3888         cm_node = i40iw_create_cm_node(&iwdev->cm_core, iwdev,
3889                                        conn_param, &cm_info);
3890
3891         if (IS_ERR(cm_node)) {
3892                 ret = PTR_ERR(cm_node);
3893                 cm_id->rem_ref(cm_id);
3894                 return ret;
3895         }
3896
3897         if ((cm_info.ipv4 && (laddr->sin_addr.s_addr != raddr->sin_addr.s_addr)) ||
3898             (!cm_info.ipv4 && memcmp(laddr6->sin6_addr.in6_u.u6_addr32,
3899                                      raddr6->sin6_addr.in6_u.u6_addr32,
3900                                      sizeof(laddr6->sin6_addr.in6_u.u6_addr32)))) {
3901                 if (i40iw_manage_qhash(iwdev, &cm_info, I40IW_QHASH_TYPE_TCP_ESTABLISHED,
3902                                        I40IW_QHASH_MANAGE_TYPE_ADD, NULL, true)) {
3903                         ret = -EINVAL;
3904                         goto err;
3905                 }
3906                 cm_node->qhash_set = true;
3907         }
3908
3909         if (i40iw_manage_apbvt(iwdev, cm_info.loc_port,
3910                                I40IW_MANAGE_APBVT_ADD)) {
3911                 ret =  -EINVAL;
3912                 goto err;
3913         }
3914
3915         cm_node->apbvt_set = true;
3916         iwqp->cm_node = cm_node;
3917         cm_node->iwqp = iwqp;
3918         iwqp->cm_id = cm_id;
3919         i40iw_add_ref(&iwqp->ibqp);
3920
3921         if (cm_node->state != I40IW_CM_STATE_OFFLOADED) {
3922                 cm_node->state = I40IW_CM_STATE_SYN_SENT;
3923                 ret = i40iw_send_syn(cm_node, 0);
3924                 if (ret)
3925                         goto err;
3926         }
3927
3928         if (cm_node->loopbackpartner) {
3929                 cm_node->loopbackpartner->state = I40IW_CM_STATE_MPAREQ_RCVD;
3930                 i40iw_create_event(cm_node->loopbackpartner,
3931                                    I40IW_CM_EVENT_MPA_REQ);
3932         }
3933
3934         i40iw_debug(cm_node->dev,
3935                     I40IW_DEBUG_CM,
3936                     "Api - connect(): port=0x%04x, cm_node=%p, cm_id = %p.\n",
3937                     cm_node->rem_port,
3938                     cm_node,
3939                     cm_node->cm_id);
3940
3941         return 0;
3942
3943 err:
3944         if (cm_info.ipv4)
3945                 i40iw_debug(&iwdev->sc_dev,
3946                             I40IW_DEBUG_CM,
3947                             "Api - connect() FAILED: dest addr=%pI4",
3948                             cm_info.rem_addr);
3949         else
3950                 i40iw_debug(&iwdev->sc_dev,
3951                             I40IW_DEBUG_CM,
3952                             "Api - connect() FAILED: dest addr=%pI6",
3953                             cm_info.rem_addr);
3954
3955         i40iw_rem_ref_cm_node(cm_node);
3956         cm_id->rem_ref(cm_id);
3957         iwdev->cm_core.stats_connect_errs++;
3958         return ret;
3959 }
3960
3961 /**
3962  * i40iw_create_listen - registered call creating listener
3963  * @cm_id: cm information for passive connection
3964  * @backlog: to max accept pending count
3965  */
3966 int i40iw_create_listen(struct iw_cm_id *cm_id, int backlog)
3967 {
3968         struct i40iw_device *iwdev;
3969         struct i40iw_cm_listener *cm_listen_node;
3970         struct i40iw_cm_info cm_info;
3971         enum i40iw_status_code ret;
3972         struct sockaddr_in *laddr;
3973         struct sockaddr_in6 *laddr6;
3974         bool wildcard = false;
3975
3976         iwdev = to_iwdev(cm_id->device);
3977         if (!iwdev)
3978                 return -EINVAL;
3979
3980         laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3981         laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3982         memset(&cm_info, 0, sizeof(cm_info));
3983         if (laddr->sin_family == AF_INET) {
3984                 cm_info.ipv4 = true;
3985                 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3986                 cm_info.loc_port = ntohs(laddr->sin_port);
3987
3988                 if (laddr->sin_addr.s_addr != INADDR_ANY)
3989                         cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr);
3990                 else
3991                         wildcard = true;
3992
3993         } else {
3994                 cm_info.ipv4 = false;
3995                 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3996                                     laddr6->sin6_addr.in6_u.u6_addr32);
3997                 cm_info.loc_port = ntohs(laddr6->sin6_port);
3998                 if (ipv6_addr_type(&laddr6->sin6_addr) != IPV6_ADDR_ANY)
3999                         i40iw_netdev_vlan_ipv6(cm_info.loc_addr,
4000                                                &cm_info.vlan_id);
4001                 else
4002                         wildcard = true;
4003         }
4004         cm_info.backlog = backlog;
4005         cm_info.cm_id = cm_id;
4006
4007         cm_listen_node = i40iw_make_listen_node(&iwdev->cm_core, iwdev, &cm_info);
4008         if (!cm_listen_node) {
4009                 i40iw_pr_err("cm_listen_node == NULL\n");
4010                 return -ENOMEM;
4011         }
4012
4013         cm_id->provider_data = cm_listen_node;
4014
4015         cm_listen_node->tos = cm_id->tos;
4016         cm_listen_node->user_pri = rt_tos2priority(cm_id->tos);
4017         cm_info.user_pri = cm_listen_node->user_pri;
4018
4019         if (!cm_listen_node->reused_node) {
4020                 if (wildcard) {
4021                         if (cm_info.ipv4)
4022                                 ret = i40iw_add_mqh_4(iwdev,
4023                                                       &cm_info,
4024                                                       cm_listen_node);
4025                         else
4026                                 ret = i40iw_add_mqh_6(iwdev,
4027                                                       &cm_info,
4028                                                       cm_listen_node);
4029                         if (ret)
4030                                 goto error;
4031
4032                         ret = i40iw_manage_apbvt(iwdev,
4033                                                  cm_info.loc_port,
4034                                                  I40IW_MANAGE_APBVT_ADD);
4035
4036                         if (ret)
4037                                 goto error;
4038                 } else {
4039                         ret = i40iw_manage_qhash(iwdev,
4040                                                  &cm_info,
4041                                                  I40IW_QHASH_TYPE_TCP_SYN,
4042                                                  I40IW_QHASH_MANAGE_TYPE_ADD,
4043                                                  NULL,
4044                                                  true);
4045                         if (ret)
4046                                 goto error;
4047                         cm_listen_node->qhash_set = true;
4048                         ret = i40iw_manage_apbvt(iwdev,
4049                                                  cm_info.loc_port,
4050                                                  I40IW_MANAGE_APBVT_ADD);
4051                         if (ret)
4052                                 goto error;
4053                 }
4054         }
4055         cm_id->add_ref(cm_id);
4056         cm_listen_node->cm_core->stats_listen_created++;
4057         return 0;
4058  error:
4059         i40iw_cm_del_listen(&iwdev->cm_core, (void *)cm_listen_node, false);
4060         return -EINVAL;
4061 }
4062
4063 /**
4064  * i40iw_destroy_listen - registered call to destroy listener
4065  * @cm_id: cm information for passive connection
4066  */
4067 int i40iw_destroy_listen(struct iw_cm_id *cm_id)
4068 {
4069         struct i40iw_device *iwdev;
4070
4071         iwdev = to_iwdev(cm_id->device);
4072         if (cm_id->provider_data)
4073                 i40iw_cm_del_listen(&iwdev->cm_core, cm_id->provider_data, true);
4074         else
4075                 i40iw_pr_err("cm_id->provider_data was NULL\n");
4076
4077         cm_id->rem_ref(cm_id);
4078
4079         return 0;
4080 }
4081
4082 /**
4083  * i40iw_cm_event_connected - handle connected active node
4084  * @event: the info for cm_node of connection
4085  */
4086 static void i40iw_cm_event_connected(struct i40iw_cm_event *event)
4087 {
4088         struct i40iw_qp *iwqp;
4089         struct i40iw_device *iwdev;
4090         struct i40iw_cm_core *cm_core;
4091         struct i40iw_cm_node *cm_node;
4092         struct i40iw_sc_dev *dev;
4093         struct ib_qp_attr attr;
4094         struct iw_cm_id *cm_id;
4095         unsigned long flags;
4096         int status;
4097         bool read0;
4098
4099         cm_node = event->cm_node;
4100         cm_id = cm_node->cm_id;
4101         iwqp = (struct i40iw_qp *)cm_id->provider_data;
4102         iwdev = to_iwdev(iwqp->ibqp.device);
4103         dev = &iwdev->sc_dev;
4104         cm_core = &iwdev->cm_core;
4105
4106         if (iwqp->destroyed) {
4107                 status = -ETIMEDOUT;
4108                 goto error;
4109         }
4110         i40iw_cm_init_tsa_conn(iwqp, cm_node);
4111         read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO);
4112         if (iwqp->page)
4113                 iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
4114         dev->iw_priv_qp_ops->qp_send_rtt(&iwqp->sc_qp, read0);
4115         if (iwqp->page)
4116                 kunmap(iwqp->page);
4117
4118         memset(&attr, 0, sizeof(attr));
4119         attr.qp_state = IB_QPS_RTS;
4120         cm_node->qhash_set = false;
4121         i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
4122
4123         cm_node->accelerated = true;
4124         spin_lock_irqsave(&cm_core->ht_lock, flags);
4125         list_move_tail(&cm_node->list, &cm_core->accelerated_list);
4126         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
4127         status = i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY,
4128                                      0);
4129         if (status)
4130                 i40iw_debug(dev, I40IW_DEBUG_CM, "error sending cm event - CONNECT_REPLY\n");
4131
4132         return;
4133
4134 error:
4135         iwqp->cm_id = NULL;
4136         cm_id->provider_data = NULL;
4137         i40iw_send_cm_event(event->cm_node,
4138                             cm_id,
4139                             IW_CM_EVENT_CONNECT_REPLY,
4140                             status);
4141         cm_id->rem_ref(cm_id);
4142         i40iw_rem_ref_cm_node(event->cm_node);
4143 }
4144
4145 /**
4146  * i40iw_cm_event_reset - handle reset
4147  * @event: the info for cm_node of connection
4148  */
4149 static void i40iw_cm_event_reset(struct i40iw_cm_event *event)
4150 {
4151         struct i40iw_cm_node *cm_node = event->cm_node;
4152         struct iw_cm_id   *cm_id = cm_node->cm_id;
4153         struct i40iw_qp *iwqp;
4154
4155         if (!cm_id)
4156                 return;
4157
4158         iwqp = cm_id->provider_data;
4159         if (!iwqp)
4160                 return;
4161
4162         i40iw_debug(cm_node->dev,
4163                     I40IW_DEBUG_CM,
4164                     "reset event %p - cm_id = %p\n",
4165                      event->cm_node, cm_id);
4166         iwqp->cm_id = NULL;
4167
4168         i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT, -ECONNRESET);
4169         i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0);
4170 }
4171
4172 /**
4173  * i40iw_cm_event_handler - worker thread callback to send event to cm upper layer
4174  * @work: pointer of cm event info.
4175  */
4176 static void i40iw_cm_event_handler(struct work_struct *work)
4177 {
4178         struct i40iw_cm_event *event = container_of(work,
4179                                                     struct i40iw_cm_event,
4180                                                     event_work);
4181         struct i40iw_cm_node *cm_node;
4182
4183         if (!event || !event->cm_node || !event->cm_node->cm_core)
4184                 return;
4185
4186         cm_node = event->cm_node;
4187
4188         switch (event->type) {
4189         case I40IW_CM_EVENT_MPA_REQ:
4190                 i40iw_send_cm_event(cm_node,
4191                                     cm_node->cm_id,
4192                                     IW_CM_EVENT_CONNECT_REQUEST,
4193                                     0);
4194                 break;
4195         case I40IW_CM_EVENT_RESET:
4196                 i40iw_cm_event_reset(event);
4197                 break;
4198         case I40IW_CM_EVENT_CONNECTED:
4199                 if (!event->cm_node->cm_id ||
4200                     (event->cm_node->state != I40IW_CM_STATE_OFFLOADED))
4201                         break;
4202                 i40iw_cm_event_connected(event);
4203                 break;
4204         case I40IW_CM_EVENT_MPA_REJECT:
4205                 if (!event->cm_node->cm_id ||
4206                     (cm_node->state == I40IW_CM_STATE_OFFLOADED))
4207                         break;
4208                 i40iw_send_cm_event(cm_node,
4209                                     cm_node->cm_id,
4210                                     IW_CM_EVENT_CONNECT_REPLY,
4211                                     -ECONNREFUSED);
4212                 break;
4213         case I40IW_CM_EVENT_ABORTED:
4214                 if (!event->cm_node->cm_id ||
4215                     (event->cm_node->state == I40IW_CM_STATE_OFFLOADED))
4216                         break;
4217                 i40iw_event_connect_error(event);
4218                 break;
4219         default:
4220                 i40iw_pr_err("event type = %d\n", event->type);
4221                 break;
4222         }
4223
4224         event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
4225         i40iw_rem_ref_cm_node(event->cm_node);
4226         kfree(event);
4227 }
4228
4229 /**
4230  * i40iw_cm_post_event - queue event request for worker thread
4231  * @event: cm node's info for up event call
4232  */
4233 static void i40iw_cm_post_event(struct i40iw_cm_event *event)
4234 {
4235         atomic_inc(&event->cm_node->ref_count);
4236         event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
4237         INIT_WORK(&event->event_work, i40iw_cm_event_handler);
4238
4239         queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
4240 }
4241
4242 /**
4243  * i40iw_qhash_ctrl - enable/disable qhash for list
4244  * @iwdev: device pointer
4245  * @parent_listen_node: parent listen node
4246  * @nfo: cm info node
4247  * @ipaddr: Pointer to IPv4 or IPv6 address
4248  * @ipv4: flag indicating IPv4 when true
4249  * @ifup: flag indicating interface up when true
4250  *
4251  * Enables or disables the qhash for the node in the child
4252  * listen list that matches ipaddr. If no matching IP was found
4253  * it will allocate and add a new child listen node to the
4254  * parent listen node. The listen_list_lock is assumed to be
4255  * held when called.
4256  */
4257 static void i40iw_qhash_ctrl(struct i40iw_device *iwdev,
4258                              struct i40iw_cm_listener *parent_listen_node,
4259                              struct i40iw_cm_info *nfo,
4260                              u32 *ipaddr, bool ipv4, bool ifup)
4261 {
4262         struct list_head *child_listen_list = &parent_listen_node->child_listen_list;
4263         struct i40iw_cm_listener *child_listen_node;
4264         struct list_head *pos, *tpos;
4265         enum i40iw_status_code ret;
4266         bool node_allocated = false;
4267         enum i40iw_quad_hash_manage_type op =
4268                 ifup ? I40IW_QHASH_MANAGE_TYPE_ADD : I40IW_QHASH_MANAGE_TYPE_DELETE;
4269
4270         list_for_each_safe(pos, tpos, child_listen_list) {
4271                 child_listen_node =
4272                         list_entry(pos,
4273                                    struct i40iw_cm_listener,
4274                                    child_listen_list);
4275                 if (!memcmp(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16))
4276                         goto set_qhash;
4277         }
4278
4279         /* if not found then add a child listener if interface is going up */
4280         if (!ifup)
4281                 return;
4282         child_listen_node = kmemdup(parent_listen_node,
4283                         sizeof(*child_listen_node), GFP_ATOMIC);
4284         if (!child_listen_node)
4285                 return;
4286         node_allocated = true;
4287
4288         memcpy(child_listen_node->loc_addr, ipaddr,  ipv4 ? 4 : 16);
4289
4290 set_qhash:
4291         memcpy(nfo->loc_addr,
4292                child_listen_node->loc_addr,
4293                sizeof(nfo->loc_addr));
4294         nfo->vlan_id = child_listen_node->vlan_id;
4295         ret = i40iw_manage_qhash(iwdev, nfo,
4296                                  I40IW_QHASH_TYPE_TCP_SYN,
4297                                  op,
4298                                  NULL, false);
4299         if (!ret) {
4300                 child_listen_node->qhash_set = ifup;
4301                 if (node_allocated)
4302                         list_add(&child_listen_node->child_listen_list,
4303                                  &parent_listen_node->child_listen_list);
4304         } else if (node_allocated) {
4305                 kfree(child_listen_node);
4306         }
4307 }
4308
4309 /**
4310  * i40iw_cm_teardown_connections - teardown QPs
4311  * @iwdev: device pointer
4312  * @ipaddr: Pointer to IPv4 or IPv6 address
4313  * @ipv4: flag indicating IPv4 when true
4314  * @disconnect_all: flag indicating disconnect all QPs
4315  * teardown QPs where source or destination addr matches ip addr
4316  */
4317 void i40iw_cm_teardown_connections(struct i40iw_device *iwdev, u32 *ipaddr,
4318                                    struct i40iw_cm_info *nfo,
4319                                    bool disconnect_all)
4320 {
4321         struct i40iw_cm_core *cm_core = &iwdev->cm_core;
4322         struct list_head *list_core_temp;
4323         struct list_head *list_node;
4324         struct i40iw_cm_node *cm_node;
4325         unsigned long flags;
4326         struct list_head teardown_list;
4327         struct ib_qp_attr attr;
4328
4329         INIT_LIST_HEAD(&teardown_list);
4330         spin_lock_irqsave(&cm_core->ht_lock, flags);
4331         list_for_each_safe(list_node, list_core_temp,
4332                            &cm_core->accelerated_list) {
4333                 cm_node = container_of(list_node, struct i40iw_cm_node, list);
4334                 if (disconnect_all ||
4335                     (nfo->vlan_id == cm_node->vlan_id &&
4336                     (!memcmp(cm_node->loc_addr, ipaddr, nfo->ipv4 ? 4 : 16) ||
4337                      !memcmp(cm_node->rem_addr, ipaddr, nfo->ipv4 ? 4 : 16)))) {
4338                         atomic_inc(&cm_node->ref_count);
4339                         list_add(&cm_node->teardown_entry, &teardown_list);
4340                 }
4341         }
4342         list_for_each_safe(list_node, list_core_temp,
4343                            &cm_core->non_accelerated_list) {
4344                 cm_node = container_of(list_node, struct i40iw_cm_node, list);
4345                 if (disconnect_all ||
4346                     (nfo->vlan_id == cm_node->vlan_id &&
4347                     (!memcmp(cm_node->loc_addr, ipaddr, nfo->ipv4 ? 4 : 16) ||
4348                      !memcmp(cm_node->rem_addr, ipaddr, nfo->ipv4 ? 4 : 16)))) {
4349                         atomic_inc(&cm_node->ref_count);
4350                         list_add(&cm_node->teardown_entry, &teardown_list);
4351                 }
4352         }
4353         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
4354
4355         list_for_each_safe(list_node, list_core_temp, &teardown_list) {
4356                 cm_node = container_of(list_node, struct i40iw_cm_node,
4357                                        teardown_entry);
4358                 attr.qp_state = IB_QPS_ERR;
4359                 i40iw_modify_qp(&cm_node->iwqp->ibqp, &attr, IB_QP_STATE, NULL);
4360                 if (iwdev->reset)
4361                         i40iw_cm_disconn(cm_node->iwqp);
4362                 i40iw_rem_ref_cm_node(cm_node);
4363         }
4364 }
4365
4366 /**
4367  * i40iw_ifdown_notify - process an ifdown on an interface
4368  * @iwdev: device pointer
4369  * @ipaddr: Pointer to IPv4 or IPv6 address
4370  * @ipv4: flag indicating IPv4 when true
4371  * @ifup: flag indicating interface up when true
4372  */
4373 void i40iw_if_notify(struct i40iw_device *iwdev, struct net_device *netdev,
4374                      u32 *ipaddr, bool ipv4, bool ifup)
4375 {
4376         struct i40iw_cm_core *cm_core = &iwdev->cm_core;
4377         unsigned long flags;
4378         struct i40iw_cm_listener *listen_node;
4379         static const u32 ip_zero[4] = { 0, 0, 0, 0 };
4380         struct i40iw_cm_info nfo;
4381         u16 vlan_id = rdma_vlan_dev_vlan_id(netdev);
4382         enum i40iw_status_code ret;
4383         enum i40iw_quad_hash_manage_type op =
4384                 ifup ? I40IW_QHASH_MANAGE_TYPE_ADD : I40IW_QHASH_MANAGE_TYPE_DELETE;
4385
4386         nfo.vlan_id = vlan_id;
4387         nfo.ipv4 = ipv4;
4388
4389         /* Disable or enable qhash for listeners */
4390         spin_lock_irqsave(&cm_core->listen_list_lock, flags);
4391         list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
4392                 if (vlan_id == listen_node->vlan_id &&
4393                     (!memcmp(listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16) ||
4394                     !memcmp(listen_node->loc_addr, ip_zero, ipv4 ? 4 : 16))) {
4395                         memcpy(nfo.loc_addr, listen_node->loc_addr,
4396                                sizeof(nfo.loc_addr));
4397                         nfo.loc_port = listen_node->loc_port;
4398                         nfo.user_pri = listen_node->user_pri;
4399                         if (!list_empty(&listen_node->child_listen_list)) {
4400                                 i40iw_qhash_ctrl(iwdev,
4401                                                  listen_node,
4402                                                  &nfo,
4403                                                  ipaddr, ipv4, ifup);
4404                         } else if (memcmp(listen_node->loc_addr, ip_zero,
4405                                           ipv4 ? 4 : 16)) {
4406                                 ret = i40iw_manage_qhash(iwdev,
4407                                                          &nfo,
4408                                                          I40IW_QHASH_TYPE_TCP_SYN,
4409                                                          op,
4410                                                          NULL,
4411                                                          false);
4412                                 if (!ret)
4413                                         listen_node->qhash_set = ifup;
4414                         }
4415                 }
4416         }
4417         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
4418
4419         /* teardown connected qp's on ifdown */
4420         if (!ifup)
4421                 i40iw_cm_teardown_connections(iwdev, ipaddr, &nfo, false);
4422 }