drivers/infiniband/hw/irdma/cm.c

   1 // SPDX-License-Identifier: GPL-2.0 or Linux-OpenIB
   2 /* Copyright (c) 2015 - 2021 Intel Corporation */
   3 #include "main.h"
   4 #include "trace.h"
   5
   6 static void irdma_cm_post_event(struct irdma_cm_event *event);
   7 static void irdma_disconnect_worker(struct work_struct *work);
   8
   9 /**
  10  * irdma_free_sqbuf - put back puda buffer if refcount is 0
  11  * @vsi: The VSI structure of the device
  12  * @bufp: puda buffer to free
  13  */
  14 void irdma_free_sqbuf(struct irdma_sc_vsi *vsi, void *bufp)
  15 {
  16         struct irdma_puda_buf *buf = bufp;
  17         struct irdma_puda_rsrc *ilq = vsi->ilq;
  18
  19         if (refcount_dec_and_test(&buf->refcount))
  20                 irdma_puda_ret_bufpool(ilq, buf);
  21 }
  22
  23 /**
  24  * irdma_record_ird_ord - Record IRD/ORD passed in
  25  * @cm_node: connection's node
  26  * @conn_ird: connection IRD
  27  * @conn_ord: connection ORD
  28  */
  29 static void irdma_record_ird_ord(struct irdma_cm_node *cm_node, u32 conn_ird,
  30                                  u32 conn_ord)
  31 {
  32         if (conn_ird > cm_node->dev->hw_attrs.max_hw_ird)
  33                 conn_ird = cm_node->dev->hw_attrs.max_hw_ird;
  34
  35         if (conn_ord > cm_node->dev->hw_attrs.max_hw_ord)
  36                 conn_ord = cm_node->dev->hw_attrs.max_hw_ord;
  37         else if (!conn_ord && cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO)
  38                 conn_ord = 1;
  39         cm_node->ird_size = conn_ird;
  40         cm_node->ord_size = conn_ord;
  41 }
  42
  43 /**
  44  * irdma_copy_ip_ntohl - copy IP address from  network to host
  45  * @dst: IP address in host order
  46  * @src: IP address in network order (big endian)
  47  */
  48 void irdma_copy_ip_ntohl(u32 *dst, __be32 *src)
  49 {
  50         *dst++ = ntohl(*src++);
  51         *dst++ = ntohl(*src++);
  52         *dst++ = ntohl(*src++);
  53         *dst = ntohl(*src);
  54 }
  55
  56 /**
  57  * irdma_copy_ip_htonl - copy IP address from host to network order
  58  * @dst: IP address in network order (big endian)
  59  * @src: IP address in host order
  60  */
  61 void irdma_copy_ip_htonl(__be32 *dst, u32 *src)
  62 {
  63         *dst++ = htonl(*src++);
  64         *dst++ = htonl(*src++);
  65         *dst++ = htonl(*src++);
  66         *dst = htonl(*src);
  67 }
  68
  69 /**
  70  * irdma_get_addr_info
  71  * @cm_node: contains ip/tcp info
  72  * @cm_info: to get a copy of the cm_node ip/tcp info
  73  */
  74 static void irdma_get_addr_info(struct irdma_cm_node *cm_node,
  75                                 struct irdma_cm_info *cm_info)
  76 {
  77         memset(cm_info, 0, sizeof(*cm_info));
  78         cm_info->ipv4 = cm_node->ipv4;
  79         cm_info->vlan_id = cm_node->vlan_id;
  80         memcpy(cm_info->loc_addr, cm_node->loc_addr, sizeof(cm_info->loc_addr));
  81         memcpy(cm_info->rem_addr, cm_node->rem_addr, sizeof(cm_info->rem_addr));
  82         cm_info->loc_port = cm_node->loc_port;
  83         cm_info->rem_port = cm_node->rem_port;
  84 }
  85
  86 /**
  87  * irdma_fill_sockaddr4 - fill in addr info for IPv4 connection
  88  * @cm_node: connection's node
  89  * @event: upper layer's cm event
  90  */
  91 static inline void irdma_fill_sockaddr4(struct irdma_cm_node *cm_node,
  92                                         struct iw_cm_event *event)
  93 {
  94         struct sockaddr_in *laddr = (struct sockaddr_in *)&event->local_addr;
  95         struct sockaddr_in *raddr = (struct sockaddr_in *)&event->remote_addr;
  96
  97         laddr->sin_family = AF_INET;
  98         raddr->sin_family = AF_INET;
  99
 100         laddr->sin_port = htons(cm_node->loc_port);
 101         raddr->sin_port = htons(cm_node->rem_port);
 102
 103         laddr->sin_addr.s_addr = htonl(cm_node->loc_addr[0]);
 104         raddr->sin_addr.s_addr = htonl(cm_node->rem_addr[0]);
 105 }
 106
 107 /**
 108  * irdma_fill_sockaddr6 - fill in addr info for IPv6 connection
 109  * @cm_node: connection's node
 110  * @event: upper layer's cm event
 111  */
 112 static inline void irdma_fill_sockaddr6(struct irdma_cm_node *cm_node,
 113                                         struct iw_cm_event *event)
 114 {
 115         struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)&event->local_addr;
 116         struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)&event->remote_addr;
 117
 118         laddr6->sin6_family = AF_INET6;
 119         raddr6->sin6_family = AF_INET6;
 120
 121         laddr6->sin6_port = htons(cm_node->loc_port);
 122         raddr6->sin6_port = htons(cm_node->rem_port);
 123
 124         irdma_copy_ip_htonl(laddr6->sin6_addr.in6_u.u6_addr32,
 125                             cm_node->loc_addr);
 126         irdma_copy_ip_htonl(raddr6->sin6_addr.in6_u.u6_addr32,
 127                             cm_node->rem_addr);
 128 }
 129
 130 /**
 131  * irdma_get_cmevent_info - for cm event upcall
 132  * @cm_node: connection's node
 133  * @cm_id: upper layers cm struct for the event
 134  * @event: upper layer's cm event
 135  */
 136 static inline void irdma_get_cmevent_info(struct irdma_cm_node *cm_node,
 137                                           struct iw_cm_id *cm_id,
 138                                           struct iw_cm_event *event)
 139 {
 140         memcpy(&event->local_addr, &cm_id->m_local_addr,
 141                sizeof(event->local_addr));
 142         memcpy(&event->remote_addr, &cm_id->m_remote_addr,
 143                sizeof(event->remote_addr));
 144         if (cm_node) {
 145                 event->private_data = cm_node->pdata_buf;
 146                 event->private_data_len = (u8)cm_node->pdata.size;
 147                 event->ird = cm_node->ird_size;
 148                 event->ord = cm_node->ord_size;
 149         }
 150 }
 151
 152 /**
 153  * irdma_send_cm_event - upcall cm's event handler
 154  * @cm_node: connection's node
 155  * @cm_id: upper layer's cm info struct
 156  * @type: Event type to indicate
 157  * @status: status for the event type
 158  */
 159 static int irdma_send_cm_event(struct irdma_cm_node *cm_node,
 160                                struct iw_cm_id *cm_id,
 161                                enum iw_cm_event_type type, int status)
 162 {
 163         struct iw_cm_event event = {};
 164
 165         event.event = type;
 166         event.status = status;
 167         trace_irdma_send_cm_event(cm_node, cm_id, type, status,
 168                                   __builtin_return_address(0));
 169
 170         ibdev_dbg(&cm_node->iwdev->ibdev,
 171                   "CM: cm_node %p cm_id=%p state=%d accel=%d event_type=%d status=%d\n",
 172                   cm_node, cm_id, cm_node->accelerated, cm_node->state, type,
 173                   status);
 174
 175         switch (type) {
 176         case IW_CM_EVENT_CONNECT_REQUEST:
 177                 if (cm_node->ipv4)
 178                         irdma_fill_sockaddr4(cm_node, &event);
 179                 else
 180                         irdma_fill_sockaddr6(cm_node, &event);
 181                 event.provider_data = cm_node;
 182                 event.private_data = cm_node->pdata_buf;
 183                 event.private_data_len = (u8)cm_node->pdata.size;
 184                 event.ird = cm_node->ird_size;
 185                 break;
 186         case IW_CM_EVENT_CONNECT_REPLY:
 187                 irdma_get_cmevent_info(cm_node, cm_id, &event);
 188                 break;
 189         case IW_CM_EVENT_ESTABLISHED:
 190                 event.ird = cm_node->ird_size;
 191                 event.ord = cm_node->ord_size;
 192                 break;
 193         case IW_CM_EVENT_DISCONNECT:
 194         case IW_CM_EVENT_CLOSE:
 195                 /* Wait if we are in RTS but havent issued the iwcm event upcall */
 196                 if (!cm_node->accelerated)
 197                         wait_for_completion(&cm_node->establish_comp);
 198                 break;
 199         default:
 200                 return -EINVAL;
 201         }
 202
 203         return cm_id->event_handler(cm_id, &event);
 204 }
 205
 206 /**
 207  * irdma_timer_list_prep - add connection nodes to a list to perform timer tasks
 208  * @cm_core: cm's core
 209  * @timer_list: a timer list to which cm_node will be selected
 210  */
 211 static void irdma_timer_list_prep(struct irdma_cm_core *cm_core,
 212                                   struct list_head *timer_list)
 213 {
 214         struct irdma_cm_node *cm_node;
 215         int bkt;
 216
 217         hash_for_each_rcu(cm_core->cm_hash_tbl, bkt, cm_node, list) {
 218                 if ((cm_node->close_entry || cm_node->send_entry) &&
 219                     refcount_inc_not_zero(&cm_node->refcnt))
 220                         list_add(&cm_node->timer_entry, timer_list);
 221         }
 222 }
 223
 224 /**
 225  * irdma_create_event - create cm event
 226  * @cm_node: connection's node
 227  * @type: Event type to generate
 228  */
 229 static struct irdma_cm_event *irdma_create_event(struct irdma_cm_node *cm_node,
 230                                                  enum irdma_cm_event_type type)
 231 {
 232         struct irdma_cm_event *event;
 233
 234         if (!cm_node->cm_id)
 235                 return NULL;
 236
 237         event = kzalloc(sizeof(*event), GFP_ATOMIC);
 238
 239         if (!event)
 240                 return NULL;
 241
 242         event->type = type;
 243         event->cm_node = cm_node;
 244         memcpy(event->cm_info.rem_addr, cm_node->rem_addr,
 245                sizeof(event->cm_info.rem_addr));
 246         memcpy(event->cm_info.loc_addr, cm_node->loc_addr,
 247                sizeof(event->cm_info.loc_addr));
 248         event->cm_info.rem_port = cm_node->rem_port;
 249         event->cm_info.loc_port = cm_node->loc_port;
 250         event->cm_info.cm_id = cm_node->cm_id;
 251         ibdev_dbg(&cm_node->iwdev->ibdev,
 252                   "CM: node=%p event=%p type=%u dst=%pI4 src=%pI4\n", cm_node,
 253                   event, type, event->cm_info.loc_addr,
 254                   event->cm_info.rem_addr);
 255         trace_irdma_create_event(cm_node, type, __builtin_return_address(0));
 256         irdma_cm_post_event(event);
 257
 258         return event;
 259 }
 260
 261 /**
 262  * irdma_free_retrans_entry - free send entry
 263  * @cm_node: connection's node
 264  */
 265 static void irdma_free_retrans_entry(struct irdma_cm_node *cm_node)
 266 {
 267         struct irdma_device *iwdev = cm_node->iwdev;
 268         struct irdma_timer_entry *send_entry;
 269
 270         send_entry = cm_node->send_entry;
 271         if (!send_entry)
 272                 return;
 273
 274         cm_node->send_entry = NULL;
 275         irdma_free_sqbuf(&iwdev->vsi, send_entry->sqbuf);
 276         kfree(send_entry);
 277         refcount_dec(&cm_node->refcnt);
 278 }
 279
 280 /**
 281  * irdma_cleanup_retrans_entry - free send entry with lock
 282  * @cm_node: connection's node
 283  */
 284 static void irdma_cleanup_retrans_entry(struct irdma_cm_node *cm_node)
 285 {
 286         unsigned long flags;
 287
 288         spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
 289         irdma_free_retrans_entry(cm_node);
 290         spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
 291 }
 292
 293 /**
 294  * irdma_form_ah_cm_frame - get a free packet and build frame with address handle
 295  * @cm_node: connection's node ionfo to use in frame
 296  * @options: pointer to options info
 297  * @hdr: pointer mpa header
 298  * @pdata: pointer to private data
 299  * @flags:  indicates FIN or ACK
 300  */
 301 static struct irdma_puda_buf *irdma_form_ah_cm_frame(struct irdma_cm_node *cm_node,
 302                                                      struct irdma_kmem_info *options,
 303                                                      struct irdma_kmem_info *hdr,
 304                                                      struct irdma_mpa_priv_info *pdata,
 305                                                      u8 flags)
 306 {
 307         struct irdma_puda_buf *sqbuf;
 308         struct irdma_sc_vsi *vsi = &cm_node->iwdev->vsi;
 309         u8 *buf;
 310         struct tcphdr *tcph;
 311         u16 pktsize;
 312         u32 opts_len = 0;
 313         u32 pd_len = 0;
 314         u32 hdr_len = 0;
 315
 316         if (!cm_node->ah || !cm_node->ah->ah_info.ah_valid) {
 317                 ibdev_dbg(&cm_node->iwdev->ibdev, "CM: AH invalid\n");
 318                 return NULL;
 319         }
 320
 321         sqbuf = irdma_puda_get_bufpool(vsi->ilq);
 322         if (!sqbuf) {
 323                 ibdev_dbg(&cm_node->iwdev->ibdev, "CM: SQ buf NULL\n");
 324                 return NULL;
 325         }
 326
 327         sqbuf->ah_id = cm_node->ah->ah_info.ah_idx;
 328         buf = sqbuf->mem.va;
 329         if (options)
 330                 opts_len = (u32)options->size;
 331
 332         if (hdr)
 333                 hdr_len = hdr->size;
 334
 335         if (pdata)
 336                 pd_len = pdata->size;
 337
 338         pktsize = sizeof(*tcph) + opts_len + hdr_len + pd_len;
 339
 340         memset(buf, 0, pktsize);
 341
 342         sqbuf->totallen = pktsize;
 343         sqbuf->tcphlen = sizeof(*tcph) + opts_len;
 344         sqbuf->scratch = cm_node;
 345
 346         tcph = (struct tcphdr *)buf;
 347         buf += sizeof(*tcph);
 348
 349         tcph->source = htons(cm_node->loc_port);
 350         tcph->dest = htons(cm_node->rem_port);
 351         tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
 352
 353         if (flags & SET_ACK) {
 354                 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
 355                 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
 356                 tcph->ack = 1;
 357         } else {
 358                 tcph->ack_seq = 0;
 359         }
 360
 361         if (flags & SET_SYN) {
 362                 cm_node->tcp_cntxt.loc_seq_num++;
 363                 tcph->syn = 1;
 364         } else {
 365                 cm_node->tcp_cntxt.loc_seq_num += hdr_len + pd_len;
 366         }
 367
 368         if (flags & SET_FIN) {
 369                 cm_node->tcp_cntxt.loc_seq_num++;
 370                 tcph->fin = 1;
 371         }
 372
 373         if (flags & SET_RST)
 374                 tcph->rst = 1;
 375
 376         tcph->doff = (u16)((sizeof(*tcph) + opts_len + 3) >> 2);
 377         sqbuf->tcphlen = tcph->doff << 2;
 378         tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
 379         tcph->urg_ptr = 0;
 380
 381         if (opts_len) {
 382                 memcpy(buf, options->addr, opts_len);
 383                 buf += opts_len;
 384         }
 385
 386         if (hdr_len) {
 387                 memcpy(buf, hdr->addr, hdr_len);
 388                 buf += hdr_len;
 389         }
 390
 391         if (pdata && pdata->addr)
 392                 memcpy(buf, pdata->addr, pdata->size);
 393
 394         refcount_set(&sqbuf->refcount, 1);
 395
 396         print_hex_dump_debug("ILQ: TRANSMIT ILQ BUFFER", DUMP_PREFIX_OFFSET,
 397                              16, 8, sqbuf->mem.va, sqbuf->totallen, false);
 398
 399         return sqbuf;
 400 }
 401
 402 /**
 403  * irdma_form_uda_cm_frame - get a free packet and build frame full tcpip packet
 404  * @cm_node: connection's node ionfo to use in frame
 405  * @options: pointer to options info
 406  * @hdr: pointer mpa header
 407  * @pdata: pointer to private data
 408  * @flags:  indicates FIN or ACK
 409  */
 410 static struct irdma_puda_buf *irdma_form_uda_cm_frame(struct irdma_cm_node *cm_node,
 411                                                       struct irdma_kmem_info *options,
 412                                                       struct irdma_kmem_info *hdr,
 413                                                       struct irdma_mpa_priv_info *pdata,
 414                                                       u8 flags)
 415 {
 416         struct irdma_puda_buf *sqbuf;
 417         struct irdma_sc_vsi *vsi = &cm_node->iwdev->vsi;
 418         u8 *buf;
 419
 420         struct tcphdr *tcph;
 421         struct iphdr *iph;
 422         struct ipv6hdr *ip6h;
 423         struct ethhdr *ethh;
 424         u16 pktsize;
 425         u16 eth_hlen = ETH_HLEN;
 426         u32 opts_len = 0;
 427         u32 pd_len = 0;
 428         u32 hdr_len = 0;
 429
 430         u16 vtag;
 431
 432         sqbuf = irdma_puda_get_bufpool(vsi->ilq);
 433         if (!sqbuf)
 434                 return NULL;
 435
 436         buf = sqbuf->mem.va;
 437
 438         if (options)
 439                 opts_len = (u32)options->size;
 440
 441         if (hdr)
 442                 hdr_len = hdr->size;
 443
 444         if (pdata)
 445                 pd_len = pdata->size;
 446
 447         if (cm_node->vlan_id < VLAN_N_VID)
 448                 eth_hlen += 4;
 449
 450         if (cm_node->ipv4)
 451                 pktsize = sizeof(*iph) + sizeof(*tcph);
 452         else
 453                 pktsize = sizeof(*ip6h) + sizeof(*tcph);
 454         pktsize += opts_len + hdr_len + pd_len;
 455
 456         memset(buf, 0, eth_hlen + pktsize);
 457
 458         sqbuf->totallen = pktsize + eth_hlen;
 459         sqbuf->maclen = eth_hlen;
 460         sqbuf->tcphlen = sizeof(*tcph) + opts_len;
 461         sqbuf->scratch = cm_node;
 462
 463         ethh = (struct ethhdr *)buf;
 464         buf += eth_hlen;
 465
 466         if (cm_node->do_lpb)
 467                 sqbuf->do_lpb = true;
 468
 469         if (cm_node->ipv4) {
 470                 sqbuf->ipv4 = true;
 471
 472                 iph = (struct iphdr *)buf;
 473                 buf += sizeof(*iph);
 474                 tcph = (struct tcphdr *)buf;
 475                 buf += sizeof(*tcph);
 476
 477                 ether_addr_copy(ethh->h_dest, cm_node->rem_mac);
 478                 ether_addr_copy(ethh->h_source, cm_node->loc_mac);
 479                 if (cm_node->vlan_id < VLAN_N_VID) {
 480                         ((struct vlan_ethhdr *)ethh)->h_vlan_proto =
 481                                 htons(ETH_P_8021Q);
 482                         vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) |
 483                                cm_node->vlan_id;
 484                         ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(vtag);
 485
 486                         ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto =
 487                                 htons(ETH_P_IP);
 488                 } else {
 489                         ethh->h_proto = htons(ETH_P_IP);
 490                 }
 491
 492                 iph->version = IPVERSION;
 493                 iph->ihl = 5; /* 5 * 4Byte words, IP headr len */
 494                 iph->tos = cm_node->tos;
 495                 iph->tot_len = htons(pktsize);
 496                 iph->id = htons(++cm_node->tcp_cntxt.loc_id);
 497
 498                 iph->frag_off = htons(0x4000);
 499                 iph->ttl = 0x40;
 500                 iph->protocol = IPPROTO_TCP;
 501                 iph->saddr = htonl(cm_node->loc_addr[0]);
 502                 iph->daddr = htonl(cm_node->rem_addr[0]);
 503         } else {
 504                 sqbuf->ipv4 = false;
 505                 ip6h = (struct ipv6hdr *)buf;
 506                 buf += sizeof(*ip6h);
 507                 tcph = (struct tcphdr *)buf;
 508                 buf += sizeof(*tcph);
 509
 510                 ether_addr_copy(ethh->h_dest, cm_node->rem_mac);
 511                 ether_addr_copy(ethh->h_source, cm_node->loc_mac);
 512                 if (cm_node->vlan_id < VLAN_N_VID) {
 513                         ((struct vlan_ethhdr *)ethh)->h_vlan_proto =
 514                                 htons(ETH_P_8021Q);
 515                         vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) |
 516                                cm_node->vlan_id;
 517                         ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(vtag);
 518                         ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto =
 519                                 htons(ETH_P_IPV6);
 520                 } else {
 521                         ethh->h_proto = htons(ETH_P_IPV6);
 522                 }
 523                 ip6h->version = 6;
 524                 ip6h->priority = cm_node->tos >> 4;
 525                 ip6h->flow_lbl[0] = cm_node->tos << 4;
 526                 ip6h->flow_lbl[1] = 0;
 527                 ip6h->flow_lbl[2] = 0;
 528                 ip6h->payload_len = htons(pktsize - sizeof(*ip6h));
 529                 ip6h->nexthdr = 6;
 530                 ip6h->hop_limit = 128;
 531                 irdma_copy_ip_htonl(ip6h->saddr.in6_u.u6_addr32,
 532                                     cm_node->loc_addr);
 533                 irdma_copy_ip_htonl(ip6h->daddr.in6_u.u6_addr32,
 534                                     cm_node->rem_addr);
 535         }
 536
 537         tcph->source = htons(cm_node->loc_port);
 538         tcph->dest = htons(cm_node->rem_port);
 539         tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
 540
 541         if (flags & SET_ACK) {
 542                 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
 543                 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
 544                 tcph->ack = 1;
 545         } else {
 546                 tcph->ack_seq = 0;
 547         }
 548
 549         if (flags & SET_SYN) {
 550                 cm_node->tcp_cntxt.loc_seq_num++;
 551                 tcph->syn = 1;
 552         } else {
 553                 cm_node->tcp_cntxt.loc_seq_num += hdr_len + pd_len;
 554         }
 555
 556         if (flags & SET_FIN) {
 557                 cm_node->tcp_cntxt.loc_seq_num++;
 558                 tcph->fin = 1;
 559         }
 560
 561         if (flags & SET_RST)
 562                 tcph->rst = 1;
 563
 564         tcph->doff = (u16)((sizeof(*tcph) + opts_len + 3) >> 2);
 565         sqbuf->tcphlen = tcph->doff << 2;
 566         tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
 567         tcph->urg_ptr = 0;
 568
 569         if (opts_len) {
 570                 memcpy(buf, options->addr, opts_len);
 571                 buf += opts_len;
 572         }
 573
 574         if (hdr_len) {
 575                 memcpy(buf, hdr->addr, hdr_len);
 576                 buf += hdr_len;
 577         }
 578
 579         if (pdata && pdata->addr)
 580                 memcpy(buf, pdata->addr, pdata->size);
 581
 582         refcount_set(&sqbuf->refcount, 1);
 583
 584         print_hex_dump_debug("ILQ: TRANSMIT ILQ BUFFER", DUMP_PREFIX_OFFSET,
 585                              16, 8, sqbuf->mem.va, sqbuf->totallen, false);
 586         return sqbuf;
 587 }
 588
 589 /**
 590  * irdma_send_reset - Send RST packet
 591  * @cm_node: connection's node
 592  */
 593 int irdma_send_reset(struct irdma_cm_node *cm_node)
 594 {
 595         struct irdma_puda_buf *sqbuf;
 596         int flags = SET_RST | SET_ACK;
 597
 598         trace_irdma_send_reset(cm_node, 0, __builtin_return_address(0));
 599         sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, NULL, NULL,
 600                                                 flags);
 601         if (!sqbuf)
 602                 return -ENOMEM;
 603
 604         ibdev_dbg(&cm_node->iwdev->ibdev,
 605                   "CM: caller: %pS cm_node %p cm_id=%p accel=%d state=%d rem_port=0x%04x, loc_port=0x%04x rem_addr=%pI4 loc_addr=%pI4\n",
 606                   __builtin_return_address(0), cm_node, cm_node->cm_id,
 607                   cm_node->accelerated, cm_node->state, cm_node->rem_port,
 608                   cm_node->loc_port, cm_node->rem_addr, cm_node->loc_addr);
 609
 610         return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 0,
 611                                        1);
 612 }
 613
 614 /**
 615  * irdma_active_open_err - send event for active side cm error
 616  * @cm_node: connection's node
 617  * @reset: Flag to send reset or not
 618  */
 619 static void irdma_active_open_err(struct irdma_cm_node *cm_node, bool reset)
 620 {
 621         trace_irdma_active_open_err(cm_node, reset,
 622                                     __builtin_return_address(0));
 623         irdma_cleanup_retrans_entry(cm_node);
 624         cm_node->cm_core->stats_connect_errs++;
 625         if (reset) {
 626                 ibdev_dbg(&cm_node->iwdev->ibdev,
 627                           "CM: cm_node=%p state=%d\n", cm_node,
 628                           cm_node->state);
 629                 refcount_inc(&cm_node->refcnt);
 630                 irdma_send_reset(cm_node);
 631         }
 632
 633         cm_node->state = IRDMA_CM_STATE_CLOSED;
 634         irdma_create_event(cm_node, IRDMA_CM_EVENT_ABORTED);
 635 }
 636
 637 /**
 638  * irdma_passive_open_err - handle passive side cm error
 639  * @cm_node: connection's node
 640  * @reset: send reset or just free cm_node
 641  */
 642 static void irdma_passive_open_err(struct irdma_cm_node *cm_node, bool reset)
 643 {
 644         irdma_cleanup_retrans_entry(cm_node);
 645         cm_node->cm_core->stats_passive_errs++;
 646         cm_node->state = IRDMA_CM_STATE_CLOSED;
 647         ibdev_dbg(&cm_node->iwdev->ibdev, "CM: cm_node=%p state =%d\n",
 648                   cm_node, cm_node->state);
 649         trace_irdma_passive_open_err(cm_node, reset,
 650                                      __builtin_return_address(0));
 651         if (reset)
 652                 irdma_send_reset(cm_node);
 653         else
 654                 irdma_rem_ref_cm_node(cm_node);
 655 }
 656
 657 /**
 658  * irdma_event_connect_error - to create connect error event
 659  * @event: cm information for connect event
 660  */
 661 static void irdma_event_connect_error(struct irdma_cm_event *event)
 662 {
 663         struct irdma_qp *iwqp;
 664         struct iw_cm_id *cm_id;
 665
 666         cm_id = event->cm_node->cm_id;
 667         if (!cm_id)
 668                 return;
 669
 670         iwqp = cm_id->provider_data;
 671
 672         if (!iwqp || !iwqp->iwdev)
 673                 return;
 674
 675         iwqp->cm_id = NULL;
 676         cm_id->provider_data = NULL;
 677         irdma_send_cm_event(event->cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY,
 678                             -ECONNRESET);
 679         irdma_rem_ref_cm_node(event->cm_node);
 680 }
 681
 682 /**
 683  * irdma_process_options - process options from TCP header
 684  * @cm_node: connection's node
 685  * @optionsloc: point to start of options
 686  * @optionsize: size of all options
 687  * @syn_pkt: flag if syn packet
 688  */
 689 static int irdma_process_options(struct irdma_cm_node *cm_node, u8 *optionsloc,
 690                                  u32 optionsize, u32 syn_pkt)
 691 {
 692         u32 tmp;
 693         u32 offset = 0;
 694         union all_known_options *all_options;
 695         char got_mss_option = 0;
 696
 697         while (offset < optionsize) {
 698                 all_options = (union all_known_options *)(optionsloc + offset);
 699                 switch (all_options->base.optionnum) {
 700                 case OPTION_NUM_EOL:
 701                         offset = optionsize;
 702                         break;
 703                 case OPTION_NUM_NONE:
 704                         offset += 1;
 705                         continue;
 706                 case OPTION_NUM_MSS:
 707                         ibdev_dbg(&cm_node->iwdev->ibdev,
 708                                   "CM: MSS Length: %d Offset: %d Size: %d\n",
 709                                   all_options->mss.len, offset, optionsize);
 710                         got_mss_option = 1;
 711                         if (all_options->mss.len != 4)
 712                                 return -EINVAL;
 713                         tmp = ntohs(all_options->mss.mss);
 714                         if ((cm_node->ipv4 &&
 715                              (tmp + IRDMA_MTU_TO_MSS_IPV4) < IRDMA_MIN_MTU_IPV4) ||
 716                             (!cm_node->ipv4 &&
 717                              (tmp + IRDMA_MTU_TO_MSS_IPV6) < IRDMA_MIN_MTU_IPV6))
 718                                 return -EINVAL;
 719                         if (tmp < cm_node->tcp_cntxt.mss)
 720                                 cm_node->tcp_cntxt.mss = tmp;
 721                         break;
 722                 case OPTION_NUM_WINDOW_SCALE:
 723                         cm_node->tcp_cntxt.snd_wscale =
 724                                 all_options->windowscale.shiftcount;
 725                         break;
 726                 default:
 727                         ibdev_dbg(&cm_node->iwdev->ibdev,
 728                                   "CM: Unsupported TCP Option: %x\n",
 729                                   all_options->base.optionnum);
 730                         break;
 731                 }
 732                 offset += all_options->base.len;
 733         }
 734         if (!got_mss_option && syn_pkt)
 735                 cm_node->tcp_cntxt.mss = IRDMA_CM_DEFAULT_MSS;
 736
 737         return 0;
 738 }
 739
 740 /**
 741  * irdma_handle_tcp_options - setup TCP context info after parsing TCP options
 742  * @cm_node: connection's node
 743  * @tcph: pointer tcp header
 744  * @optionsize: size of options rcvd
 745  * @passive: active or passive flag
 746  */
 747 static int irdma_handle_tcp_options(struct irdma_cm_node *cm_node,
 748                                     struct tcphdr *tcph, int optionsize,
 749                                     int passive)
 750 {
 751         u8 *optionsloc = (u8 *)&tcph[1];
 752         int ret;
 753
 754         if (optionsize) {
 755                 ret = irdma_process_options(cm_node, optionsloc, optionsize,
 756                                             (u32)tcph->syn);
 757                 if (ret) {
 758                         ibdev_dbg(&cm_node->iwdev->ibdev,
 759                                   "CM: Node %p, Sending Reset\n", cm_node);
 760                         if (passive)
 761                                 irdma_passive_open_err(cm_node, true);
 762                         else
 763                                 irdma_active_open_err(cm_node, true);
 764                         return ret;
 765                 }
 766         }
 767
 768         cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window)
 769                                      << cm_node->tcp_cntxt.snd_wscale;
 770
 771         if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
 772                 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
 773
 774         return 0;
 775 }
 776
 777 /**
 778  * irdma_build_mpa_v1 - build a MPA V1 frame
 779  * @cm_node: connection's node
 780  * @start_addr: address where to build frame
 781  * @mpa_key: to do read0 or write0
 782  */
 783 static void irdma_build_mpa_v1(struct irdma_cm_node *cm_node, void *start_addr,
 784                                u8 mpa_key)
 785 {
 786         struct ietf_mpa_v1 *mpa_frame = start_addr;
 787
 788         switch (mpa_key) {
 789         case MPA_KEY_REQUEST:
 790                 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
 791                 break;
 792         case MPA_KEY_REPLY:
 793                 memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
 794                 break;
 795         default:
 796                 break;
 797         }
 798         mpa_frame->flags = IETF_MPA_FLAGS_CRC;
 799         mpa_frame->rev = cm_node->mpa_frame_rev;
 800         mpa_frame->priv_data_len = htons(cm_node->pdata.size);
 801 }
 802
 803 /**
 804  * irdma_build_mpa_v2 - build a MPA V2 frame
 805  * @cm_node: connection's node
 806  * @start_addr: buffer start address
 807  * @mpa_key: to do read0 or write0
 808  */
 809 static void irdma_build_mpa_v2(struct irdma_cm_node *cm_node, void *start_addr,
 810                                u8 mpa_key)
 811 {
 812         struct ietf_mpa_v2 *mpa_frame = start_addr;
 813         struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg;
 814         u16 ctrl_ird, ctrl_ord;
 815
 816         /* initialize the upper 5 bytes of the frame */
 817         irdma_build_mpa_v1(cm_node, start_addr, mpa_key);
 818         mpa_frame->flags |= IETF_MPA_V2_FLAG;
 819         if (cm_node->iwdev->iw_ooo) {
 820                 mpa_frame->flags |= IETF_MPA_FLAGS_MARKERS;
 821                 cm_node->rcv_mark_en = true;
 822         }
 823         mpa_frame->priv_data_len = cpu_to_be16(be16_to_cpu(mpa_frame->priv_data_len) +
 824                                                IETF_RTR_MSG_SIZE);
 825
 826         /* initialize RTR msg */
 827         if (cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) {
 828                 ctrl_ird = IETF_NO_IRD_ORD;
 829                 ctrl_ord = IETF_NO_IRD_ORD;
 830         } else {
 831                 ctrl_ird = (cm_node->ird_size > IETF_NO_IRD_ORD) ?
 832                                    IETF_NO_IRD_ORD :
 833                                    cm_node->ird_size;
 834                 ctrl_ord = (cm_node->ord_size > IETF_NO_IRD_ORD) ?
 835                                    IETF_NO_IRD_ORD :
 836                                    cm_node->ord_size;
 837         }
 838         ctrl_ird |= IETF_PEER_TO_PEER;
 839
 840         switch (mpa_key) {
 841         case MPA_KEY_REQUEST:
 842                 ctrl_ord |= IETF_RDMA0_WRITE;
 843                 ctrl_ord |= IETF_RDMA0_READ;
 844                 break;
 845         case MPA_KEY_REPLY:
 846                 switch (cm_node->send_rdma0_op) {
 847                 case SEND_RDMA_WRITE_ZERO:
 848                         ctrl_ord |= IETF_RDMA0_WRITE;
 849                         break;
 850                 case SEND_RDMA_READ_ZERO:
 851                         ctrl_ord |= IETF_RDMA0_READ;
 852                         break;
 853                 }
 854                 break;
 855         default:
 856                 break;
 857         }
 858         rtr_msg->ctrl_ird = htons(ctrl_ird);
 859         rtr_msg->ctrl_ord = htons(ctrl_ord);
 860 }
 861
 862 /**
 863  * irdma_cm_build_mpa_frame - build mpa frame for mpa version 1 or version 2
 864  * @cm_node: connection's node
 865  * @mpa: mpa: data buffer
 866  * @mpa_key: to do read0 or write0
 867  */
 868 static int irdma_cm_build_mpa_frame(struct irdma_cm_node *cm_node,
 869                                     struct irdma_kmem_info *mpa, u8 mpa_key)
 870 {
 871         int hdr_len = 0;
 872
 873         switch (cm_node->mpa_frame_rev) {
 874         case IETF_MPA_V1:
 875                 hdr_len = sizeof(struct ietf_mpa_v1);
 876                 irdma_build_mpa_v1(cm_node, mpa->addr, mpa_key);
 877                 break;
 878         case IETF_MPA_V2:
 879                 hdr_len = sizeof(struct ietf_mpa_v2);
 880                 irdma_build_mpa_v2(cm_node, mpa->addr, mpa_key);
 881                 break;
 882         default:
 883                 break;
 884         }
 885
 886         return hdr_len;
 887 }
 888
 889 /**
 890  * irdma_send_mpa_request - active node send mpa request to passive node
 891  * @cm_node: connection's node
 892  */
 893 static int irdma_send_mpa_request(struct irdma_cm_node *cm_node)
 894 {
 895         struct irdma_puda_buf *sqbuf;
 896
 897         cm_node->mpa_hdr.addr = &cm_node->mpa_v2_frame;
 898         cm_node->mpa_hdr.size = irdma_cm_build_mpa_frame(cm_node,
 899                                                          &cm_node->mpa_hdr,
 900                                                          MPA_KEY_REQUEST);
 901         if (!cm_node->mpa_hdr.size) {
 902                 ibdev_dbg(&cm_node->iwdev->ibdev,
 903                           "CM: mpa size = %d\n", cm_node->mpa_hdr.size);
 904                 return -EINVAL;
 905         }
 906
 907         sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL,
 908                                                 &cm_node->mpa_hdr,
 909                                                 &cm_node->pdata, SET_ACK);
 910         if (!sqbuf)
 911                 return -ENOMEM;
 912
 913         return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 1,
 914                                        0);
 915 }
 916
 917 /**
 918  * irdma_send_mpa_reject -
 919  * @cm_node: connection's node
 920  * @pdata: reject data for connection
 921  * @plen: length of reject data
 922  */
 923 static int irdma_send_mpa_reject(struct irdma_cm_node *cm_node,
 924                                  const void *pdata, u8 plen)
 925 {
 926         struct irdma_puda_buf *sqbuf;
 927         struct irdma_mpa_priv_info priv_info;
 928
 929         cm_node->mpa_hdr.addr = &cm_node->mpa_v2_frame;
 930         cm_node->mpa_hdr.size = irdma_cm_build_mpa_frame(cm_node,
 931                                                          &cm_node->mpa_hdr,
 932                                                          MPA_KEY_REPLY);
 933
 934         cm_node->mpa_frame.flags |= IETF_MPA_FLAGS_REJECT;
 935         priv_info.addr = pdata;
 936         priv_info.size = plen;
 937
 938         sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL,
 939                                                 &cm_node->mpa_hdr, &priv_info,
 940                                                 SET_ACK | SET_FIN);
 941         if (!sqbuf)
 942                 return -ENOMEM;
 943
 944         cm_node->state = IRDMA_CM_STATE_FIN_WAIT1;
 945
 946         return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 1,
 947                                        0);
 948 }
 949
 950 /**
 951  * irdma_negotiate_mpa_v2_ird_ord - negotiate MPAv2 IRD/ORD
 952  * @cm_node: connection's node
 953  * @buf: Data pointer
 954  */
 955 static int irdma_negotiate_mpa_v2_ird_ord(struct irdma_cm_node *cm_node,
 956                                           u8 *buf)
 957 {
 958         struct ietf_mpa_v2 *mpa_v2_frame;
 959         struct ietf_rtr_msg *rtr_msg;
 960         u16 ird_size;
 961         u16 ord_size;
 962         u16 ctrl_ord;
 963         u16 ctrl_ird;
 964
 965         mpa_v2_frame = (struct ietf_mpa_v2 *)buf;
 966         rtr_msg = &mpa_v2_frame->rtr_msg;
 967
 968         /* parse rtr message */
 969         ctrl_ord = ntohs(rtr_msg->ctrl_ord);
 970         ctrl_ird = ntohs(rtr_msg->ctrl_ird);
 971         ird_size = ctrl_ird & IETF_NO_IRD_ORD;
 972         ord_size = ctrl_ord & IETF_NO_IRD_ORD;
 973
 974         if (!(ctrl_ird & IETF_PEER_TO_PEER))
 975                 return -EOPNOTSUPP;
 976
 977         if (ird_size == IETF_NO_IRD_ORD || ord_size == IETF_NO_IRD_ORD) {
 978                 cm_node->mpav2_ird_ord = IETF_NO_IRD_ORD;
 979                 goto negotiate_done;
 980         }
 981
 982         if (cm_node->state != IRDMA_CM_STATE_MPAREQ_SENT) {
 983                 /* responder */
 984                 if (!ord_size && (ctrl_ord & IETF_RDMA0_READ))
 985                         cm_node->ird_size = 1;
 986                 if (cm_node->ord_size > ird_size)
 987                         cm_node->ord_size = ird_size;
 988         } else {
 989                 /* initiator */
 990                 if (!ird_size && (ctrl_ord & IETF_RDMA0_READ))
 991                         /* Remote peer doesn't support RDMA0_READ */
 992                         return -EOPNOTSUPP;
 993
 994                 if (cm_node->ord_size > ird_size)
 995                         cm_node->ord_size = ird_size;
 996
 997                 if (cm_node->ird_size < ord_size)
 998                 /* no resources available */
 999                         return -EINVAL;
1000         }
1001
1002 negotiate_done:
1003         if (ctrl_ord & IETF_RDMA0_READ)
1004                 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
1005         else if (ctrl_ord & IETF_RDMA0_WRITE)
1006                 cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO;
1007         else
1008                 /* Not supported RDMA0 operation */
1009                 return -EOPNOTSUPP;
1010
1011         ibdev_dbg(&cm_node->iwdev->ibdev,
1012                   "CM: MPAV2 Negotiated ORD: %d, IRD: %d\n",
1013                   cm_node->ord_size, cm_node->ird_size);
1014         trace_irdma_negotiate_mpa_v2(cm_node);
1015         return 0;
1016 }
1017
1018 /**
1019  * irdma_parse_mpa - process an IETF MPA frame
1020  * @cm_node: connection's node
1021  * @buf: Data pointer
1022  * @type: to return accept or reject
1023  * @len: Len of mpa buffer
1024  */
1025 static int irdma_parse_mpa(struct irdma_cm_node *cm_node, u8 *buf, u32 *type,
1026                            u32 len)
1027 {
1028         struct ietf_mpa_v1 *mpa_frame;
1029         int mpa_hdr_len, priv_data_len, ret;
1030
1031         *type = IRDMA_MPA_REQUEST_ACCEPT;
1032
1033         if (len < sizeof(struct ietf_mpa_v1)) {
1034                 ibdev_dbg(&cm_node->iwdev->ibdev,
1035                           "CM: ietf buffer small (%x)\n", len);
1036                 return -EINVAL;
1037         }
1038
1039         mpa_frame = (struct ietf_mpa_v1 *)buf;
1040         mpa_hdr_len = sizeof(struct ietf_mpa_v1);
1041         priv_data_len = ntohs(mpa_frame->priv_data_len);
1042
1043         if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) {
1044                 ibdev_dbg(&cm_node->iwdev->ibdev,
1045                           "CM: private_data too big %d\n", priv_data_len);
1046                 return -EOVERFLOW;
1047         }
1048
1049         if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) {
1050                 ibdev_dbg(&cm_node->iwdev->ibdev,
1051                           "CM: unsupported mpa rev = %d\n", mpa_frame->rev);
1052                 return -EINVAL;
1053         }
1054
1055         if (mpa_frame->rev > cm_node->mpa_frame_rev) {
1056                 ibdev_dbg(&cm_node->iwdev->ibdev, "CM: rev %d\n",
1057                           mpa_frame->rev);
1058                 return -EINVAL;
1059         }
1060
1061         cm_node->mpa_frame_rev = mpa_frame->rev;
1062         if (cm_node->state != IRDMA_CM_STATE_MPAREQ_SENT) {
1063                 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ,
1064                            IETF_MPA_KEY_SIZE)) {
1065                         ibdev_dbg(&cm_node->iwdev->ibdev,
1066                                   "CM: Unexpected MPA Key received\n");
1067                         return -EINVAL;
1068                 }
1069         } else {
1070                 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP,
1071                            IETF_MPA_KEY_SIZE)) {
1072                         ibdev_dbg(&cm_node->iwdev->ibdev,
1073                                   "CM: Unexpected MPA Key received\n");
1074                         return -EINVAL;
1075                 }
1076         }
1077
1078         if (priv_data_len + mpa_hdr_len > len) {
1079                 ibdev_dbg(&cm_node->iwdev->ibdev,
1080                           "CM: ietf buffer len(%x + %x != %x)\n",
1081                           priv_data_len, mpa_hdr_len, len);
1082                 return -EOVERFLOW;
1083         }
1084
1085         if (len > IRDMA_MAX_CM_BUF) {
1086                 ibdev_dbg(&cm_node->iwdev->ibdev,
1087                           "CM: ietf buffer large len = %d\n", len);
1088                 return -EOVERFLOW;
1089         }
1090
1091         switch (mpa_frame->rev) {
1092         case IETF_MPA_V2:
1093                 mpa_hdr_len += IETF_RTR_MSG_SIZE;
1094                 ret = irdma_negotiate_mpa_v2_ird_ord(cm_node, buf);
1095                 if (ret)
1096                         return ret;
1097                 break;
1098         case IETF_MPA_V1:
1099         default:
1100                 break;
1101         }
1102
1103         memcpy(cm_node->pdata_buf, buf + mpa_hdr_len, priv_data_len);
1104         cm_node->pdata.size = priv_data_len;
1105
1106         if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT)
1107                 *type = IRDMA_MPA_REQUEST_REJECT;
1108
1109         if (mpa_frame->flags & IETF_MPA_FLAGS_MARKERS)
1110                 cm_node->snd_mark_en = true;
1111
1112         return 0;
1113 }
1114
1115 /**
1116  * irdma_schedule_cm_timer
1117  * @cm_node: connection's node
1118  * @sqbuf: buffer to send
1119  * @type: if it is send or close
1120  * @send_retrans: if rexmits to be done
1121  * @close_when_complete: is cm_node to be removed
1122  *
1123  * note - cm_node needs to be protected before calling this. Encase in:
1124  *              irdma_rem_ref_cm_node(cm_core, cm_node);
1125  *              irdma_schedule_cm_timer(...)
1126  *              refcount_inc(&cm_node->refcnt);
1127  */
1128 int irdma_schedule_cm_timer(struct irdma_cm_node *cm_node,
1129                             struct irdma_puda_buf *sqbuf,
1130                             enum irdma_timer_type type, int send_retrans,
1131                             int close_when_complete)
1132 {
1133         struct irdma_sc_vsi *vsi = &cm_node->iwdev->vsi;
1134         struct irdma_cm_core *cm_core = cm_node->cm_core;
1135         struct irdma_timer_entry *new_send;
1136         u32 was_timer_set;
1137         unsigned long flags;
1138
1139         new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
1140         if (!new_send) {
1141                 if (type != IRDMA_TIMER_TYPE_CLOSE)
1142                         irdma_free_sqbuf(vsi, sqbuf);
1143                 return -ENOMEM;
1144         }
1145
1146         new_send->retrycount = IRDMA_DEFAULT_RETRYS;
1147         new_send->retranscount = IRDMA_DEFAULT_RETRANS;
1148         new_send->sqbuf = sqbuf;
1149         new_send->timetosend = jiffies;
1150         new_send->type = type;
1151         new_send->send_retrans = send_retrans;
1152         new_send->close_when_complete = close_when_complete;
1153
1154         if (type == IRDMA_TIMER_TYPE_CLOSE) {
1155                 new_send->timetosend += (HZ / 10);
1156                 if (cm_node->close_entry) {
1157                         kfree(new_send);
1158                         ibdev_dbg(&cm_node->iwdev->ibdev,
1159                                   "CM: already close entry\n");
1160                         return -EINVAL;
1161                 }
1162
1163                 cm_node->close_entry = new_send;
1164         } else { /* type == IRDMA_TIMER_TYPE_SEND */
1165                 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1166                 cm_node->send_entry = new_send;
1167                 refcount_inc(&cm_node->refcnt);
1168                 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1169                 new_send->timetosend = jiffies + IRDMA_RETRY_TIMEOUT;
1170
1171                 refcount_inc(&sqbuf->refcount);
1172                 irdma_puda_send_buf(vsi->ilq, sqbuf);
1173                 if (!send_retrans) {
1174                         irdma_cleanup_retrans_entry(cm_node);
1175                         if (close_when_complete)
1176                                 irdma_rem_ref_cm_node(cm_node);
1177                         return 0;
1178                 }
1179         }
1180
1181         spin_lock_irqsave(&cm_core->ht_lock, flags);
1182         was_timer_set = timer_pending(&cm_core->tcp_timer);
1183
1184         if (!was_timer_set) {
1185                 cm_core->tcp_timer.expires = new_send->timetosend;
1186                 add_timer(&cm_core->tcp_timer);
1187         }
1188         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1189
1190         return 0;
1191 }
1192
1193 /**
1194  * irdma_retrans_expired - Could not rexmit the packet
1195  * @cm_node: connection's node
1196  */
1197 static void irdma_retrans_expired(struct irdma_cm_node *cm_node)
1198 {
1199         enum irdma_cm_node_state state = cm_node->state;
1200
1201         cm_node->state = IRDMA_CM_STATE_CLOSED;
1202         switch (state) {
1203         case IRDMA_CM_STATE_SYN_RCVD:
1204         case IRDMA_CM_STATE_CLOSING:
1205                 irdma_rem_ref_cm_node(cm_node);
1206                 break;
1207         case IRDMA_CM_STATE_FIN_WAIT1:
1208         case IRDMA_CM_STATE_LAST_ACK:
1209                 irdma_send_reset(cm_node);
1210                 break;
1211         default:
1212                 refcount_inc(&cm_node->refcnt);
1213                 irdma_send_reset(cm_node);
1214                 irdma_create_event(cm_node, IRDMA_CM_EVENT_ABORTED);
1215                 break;
1216         }
1217 }
1218
1219 /**
1220  * irdma_handle_close_entry - for handling retry/timeouts
1221  * @cm_node: connection's node
1222  * @rem_node: flag for remove cm_node
1223  */
1224 static void irdma_handle_close_entry(struct irdma_cm_node *cm_node,
1225                                      u32 rem_node)
1226 {
1227         struct irdma_timer_entry *close_entry = cm_node->close_entry;
1228         struct irdma_qp *iwqp;
1229         unsigned long flags;
1230
1231         if (!close_entry)
1232                 return;
1233         iwqp = (struct irdma_qp *)close_entry->sqbuf;
1234         if (iwqp) {
1235                 spin_lock_irqsave(&iwqp->lock, flags);
1236                 if (iwqp->cm_id) {
1237                         iwqp->hw_tcp_state = IRDMA_TCP_STATE_CLOSED;
1238                         iwqp->hw_iwarp_state = IRDMA_QP_STATE_ERROR;
1239                         iwqp->last_aeq = IRDMA_AE_RESET_SENT;
1240                         iwqp->ibqp_state = IB_QPS_ERR;
1241                         spin_unlock_irqrestore(&iwqp->lock, flags);
1242                         irdma_cm_disconn(iwqp);
1243                 } else {
1244                         spin_unlock_irqrestore(&iwqp->lock, flags);
1245                 }
1246         } else if (rem_node) {
1247                 /* TIME_WAIT state */
1248                 irdma_rem_ref_cm_node(cm_node);
1249         }
1250
1251         kfree(close_entry);
1252         cm_node->close_entry = NULL;
1253 }
1254
1255 /**
1256  * irdma_cm_timer_tick - system's timer expired callback
1257  * @t: Pointer to timer_list
1258  */
1259 static void irdma_cm_timer_tick(struct timer_list *t)
1260 {
1261         unsigned long nexttimeout = jiffies + IRDMA_LONG_TIME;
1262         struct irdma_cm_node *cm_node;
1263         struct irdma_timer_entry *send_entry, *close_entry;
1264         struct list_head *list_core_temp;
1265         struct list_head *list_node;
1266         struct irdma_cm_core *cm_core = from_timer(cm_core, t, tcp_timer);
1267         struct irdma_sc_vsi *vsi;
1268         u32 settimer = 0;
1269         unsigned long timetosend;
1270         unsigned long flags;
1271         struct list_head timer_list;
1272
1273         INIT_LIST_HEAD(&timer_list);
1274
1275         rcu_read_lock();
1276         irdma_timer_list_prep(cm_core, &timer_list);
1277         rcu_read_unlock();
1278
1279         list_for_each_safe (list_node, list_core_temp, &timer_list) {
1280                 cm_node = container_of(list_node, struct irdma_cm_node,
1281                                        timer_entry);
1282                 close_entry = cm_node->close_entry;
1283
1284                 if (close_entry) {
1285                         if (time_after(close_entry->timetosend, jiffies)) {
1286                                 if (nexttimeout > close_entry->timetosend ||
1287                                     !settimer) {
1288                                         nexttimeout = close_entry->timetosend;
1289                                         settimer = 1;
1290                                 }
1291                         } else {
1292                                 irdma_handle_close_entry(cm_node, 1);
1293                         }
1294                 }
1295
1296                 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1297
1298                 send_entry = cm_node->send_entry;
1299                 if (!send_entry)
1300                         goto done;
1301                 if (time_after(send_entry->timetosend, jiffies)) {
1302                         if (cm_node->state != IRDMA_CM_STATE_OFFLOADED) {
1303                                 if (nexttimeout > send_entry->timetosend ||
1304                                     !settimer) {
1305                                         nexttimeout = send_entry->timetosend;
1306                                         settimer = 1;
1307                                 }
1308                         } else {
1309                                 irdma_free_retrans_entry(cm_node);
1310                         }
1311                         goto done;
1312                 }
1313
1314                 if (cm_node->state == IRDMA_CM_STATE_OFFLOADED ||
1315                     cm_node->state == IRDMA_CM_STATE_CLOSED) {
1316                         irdma_free_retrans_entry(cm_node);
1317                         goto done;
1318                 }
1319
1320                 if (!send_entry->retranscount || !send_entry->retrycount) {
1321                         irdma_free_retrans_entry(cm_node);
1322
1323                         spin_unlock_irqrestore(&cm_node->retrans_list_lock,
1324                                                flags);
1325                         irdma_retrans_expired(cm_node);
1326                         cm_node->state = IRDMA_CM_STATE_CLOSED;
1327                         spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1328                         goto done;
1329                 }
1330                 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1331
1332                 vsi = &cm_node->iwdev->vsi;
1333                 if (!cm_node->ack_rcvd) {
1334                         refcount_inc(&send_entry->sqbuf->refcount);
1335                         irdma_puda_send_buf(vsi->ilq, send_entry->sqbuf);
1336                         cm_node->cm_core->stats_pkt_retrans++;
1337                 }
1338
1339                 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1340                 if (send_entry->send_retrans) {
1341                         send_entry->retranscount--;
1342                         timetosend = (IRDMA_RETRY_TIMEOUT <<
1343                                       (IRDMA_DEFAULT_RETRANS -
1344                                        send_entry->retranscount));
1345
1346                         send_entry->timetosend = jiffies +
1347                             min(timetosend, IRDMA_MAX_TIMEOUT);
1348                         if (nexttimeout > send_entry->timetosend || !settimer) {
1349                                 nexttimeout = send_entry->timetosend;
1350                                 settimer = 1;
1351                         }
1352                 } else {
1353                         int close_when_complete;
1354
1355                         close_when_complete = send_entry->close_when_complete;
1356                         irdma_free_retrans_entry(cm_node);
1357                         if (close_when_complete)
1358                                 irdma_rem_ref_cm_node(cm_node);
1359                 }
1360 done:
1361                 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1362                 irdma_rem_ref_cm_node(cm_node);
1363         }
1364
1365         if (settimer) {
1366                 spin_lock_irqsave(&cm_core->ht_lock, flags);
1367                 if (!timer_pending(&cm_core->tcp_timer)) {
1368                         cm_core->tcp_timer.expires = nexttimeout;
1369                         add_timer(&cm_core->tcp_timer);
1370                 }
1371                 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1372         }
1373 }
1374
1375 /**
1376  * irdma_send_syn - send SYN packet
1377  * @cm_node: connection's node
1378  * @sendack: flag to set ACK bit or not
1379  */
1380 int irdma_send_syn(struct irdma_cm_node *cm_node, u32 sendack)
1381 {
1382         struct irdma_puda_buf *sqbuf;
1383         int flags = SET_SYN;
1384         char optionsbuf[sizeof(struct option_mss) +
1385                         sizeof(struct option_windowscale) +
1386                         sizeof(struct option_base) + TCP_OPTIONS_PADDING];
1387         struct irdma_kmem_info opts;
1388         int optionssize = 0;
1389         /* Sending MSS option */
1390         union all_known_options *options;
1391
1392         opts.addr = optionsbuf;
1393         if (!cm_node)
1394                 return -EINVAL;
1395
1396         options = (union all_known_options *)&optionsbuf[optionssize];
1397         options->mss.optionnum = OPTION_NUM_MSS;
1398         options->mss.len = sizeof(struct option_mss);
1399         options->mss.mss = htons(cm_node->tcp_cntxt.mss);
1400         optionssize += sizeof(struct option_mss);
1401
1402         options = (union all_known_options *)&optionsbuf[optionssize];
1403         options->windowscale.optionnum = OPTION_NUM_WINDOW_SCALE;
1404         options->windowscale.len = sizeof(struct option_windowscale);
1405         options->windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
1406         optionssize += sizeof(struct option_windowscale);
1407         options = (union all_known_options *)&optionsbuf[optionssize];
1408         options->eol = OPTION_NUM_EOL;
1409         optionssize += 1;
1410
1411         if (sendack)
1412                 flags |= SET_ACK;
1413
1414         opts.size = optionssize;
1415
1416         sqbuf = cm_node->cm_core->form_cm_frame(cm_node, &opts, NULL, NULL,
1417                                                 flags);
1418         if (!sqbuf)
1419                 return -ENOMEM;
1420
1421         return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 1,
1422                                        0);
1423 }
1424
1425 /**
1426  * irdma_send_ack - Send ACK packet
1427  * @cm_node: connection's node
1428  */
1429 void irdma_send_ack(struct irdma_cm_node *cm_node)
1430 {
1431         struct irdma_puda_buf *sqbuf;
1432         struct irdma_sc_vsi *vsi = &cm_node->iwdev->vsi;
1433
1434         sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, NULL, NULL,
1435                                                 SET_ACK);
1436         if (sqbuf)
1437                 irdma_puda_send_buf(vsi->ilq, sqbuf);
1438 }
1439
1440 /**
1441  * irdma_send_fin - Send FIN pkt
1442  * @cm_node: connection's node
1443  */
1444 static int irdma_send_fin(struct irdma_cm_node *cm_node)
1445 {
1446         struct irdma_puda_buf *sqbuf;
1447
1448         sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, NULL, NULL,
1449                                                 SET_ACK | SET_FIN);
1450         if (!sqbuf)
1451                 return -ENOMEM;
1452
1453         return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 1,
1454                                        0);
1455 }
1456
1457 /**
1458  * irdma_find_listener - find a cm node listening on this addr-port pair
1459  * @cm_core: cm's core
1460  * @dst_addr: listener ip addr
1461  * @dst_port: listener tcp port num
1462  * @vlan_id: virtual LAN ID
1463  * @listener_state: state to match with listen node's
1464  */
1465 static struct irdma_cm_listener *
1466 irdma_find_listener(struct irdma_cm_core *cm_core, u32 *dst_addr, u16 dst_port,
1467                     u16 vlan_id, enum irdma_cm_listener_state listener_state)
1468 {
1469         struct irdma_cm_listener *listen_node;
1470         static const u32 ip_zero[4] = { 0, 0, 0, 0 };
1471         u32 listen_addr[4];
1472         u16 listen_port;
1473         unsigned long flags;
1474
1475         /* walk list and find cm_node associated with this session ID */
1476         spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1477         list_for_each_entry (listen_node, &cm_core->listen_list, list) {
1478                 memcpy(listen_addr, listen_node->loc_addr, sizeof(listen_addr));
1479                 listen_port = listen_node->loc_port;
1480                 /* compare node pair, return node handle if a match */
1481                 if ((!memcmp(listen_addr, dst_addr, sizeof(listen_addr)) ||
1482                      !memcmp(listen_addr, ip_zero, sizeof(listen_addr))) &&
1483                     listen_port == dst_port &&
1484                     vlan_id == listen_node->vlan_id &&
1485                     (listener_state & listen_node->listener_state)) {
1486                         refcount_inc(&listen_node->refcnt);
1487                         spin_unlock_irqrestore(&cm_core->listen_list_lock,
1488                                                flags);
1489                         trace_irdma_find_listener(listen_node);
1490                         return listen_node;
1491                 }
1492         }
1493         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1494
1495         return NULL;
1496 }
1497
1498 /**
1499  * irdma_del_multiple_qhash - Remove qhash and child listens
1500  * @iwdev: iWarp device
1501  * @cm_info: CM info for parent listen node
1502  * @cm_parent_listen_node: The parent listen node
1503  */
1504 static enum irdma_status_code
1505 irdma_del_multiple_qhash(struct irdma_device *iwdev,
1506                          struct irdma_cm_info *cm_info,
1507                          struct irdma_cm_listener *cm_parent_listen_node)
1508 {
1509         struct irdma_cm_listener *child_listen_node;
1510         enum irdma_status_code ret = IRDMA_ERR_CFG;
1511         struct list_head *pos, *tpos;
1512         unsigned long flags;
1513
1514         spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1515         list_for_each_safe (pos, tpos,
1516                             &cm_parent_listen_node->child_listen_list) {
1517                 child_listen_node = list_entry(pos, struct irdma_cm_listener,
1518                                                child_listen_list);
1519                 if (child_listen_node->ipv4)
1520                         ibdev_dbg(&iwdev->ibdev,
1521                                   "CM: removing child listen for IP=%pI4, port=%d, vlan=%d\n",
1522                                   child_listen_node->loc_addr,
1523                                   child_listen_node->loc_port,
1524                                   child_listen_node->vlan_id);
1525                 else
1526                         ibdev_dbg(&iwdev->ibdev,
1527                                   "CM: removing child listen for IP=%pI6, port=%d, vlan=%d\n",
1528                                   child_listen_node->loc_addr,
1529                                   child_listen_node->loc_port,
1530                                   child_listen_node->vlan_id);
1531                 trace_irdma_del_multiple_qhash(child_listen_node);
1532                 list_del(pos);
1533                 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1534                        sizeof(cm_info->loc_addr));
1535                 cm_info->vlan_id = child_listen_node->vlan_id;
1536                 if (child_listen_node->qhash_set) {
1537                         ret = irdma_manage_qhash(iwdev, cm_info,
1538                                                  IRDMA_QHASH_TYPE_TCP_SYN,
1539                                                  IRDMA_QHASH_MANAGE_TYPE_DELETE,
1540                                                  NULL, false);
1541                         child_listen_node->qhash_set = false;
1542                 } else {
1543                         ret = 0;
1544                 }
1545                 ibdev_dbg(&iwdev->ibdev,
1546                           "CM: Child listen node freed = %p\n",
1547                           child_listen_node);
1548                 kfree(child_listen_node);
1549                 cm_parent_listen_node->cm_core->stats_listen_nodes_destroyed++;
1550         }
1551         spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1552
1553         return ret;
1554 }
1555
1556 /**
1557  * irdma_netdev_vlan_ipv6 - Gets the netdev and mac
1558  * @addr: local IPv6 address
1559  * @vlan_id: vlan id for the given IPv6 address
1560  * @mac: mac address for the given IPv6 address
1561  *
1562  * Returns the net_device of the IPv6 address and also sets the
1563  * vlan id and mac for that address.
1564  */
1565 struct net_device *irdma_netdev_vlan_ipv6(u32 *addr, u16 *vlan_id, u8 *mac)
1566 {
1567         struct net_device *ip_dev = NULL;
1568         struct in6_addr laddr6;
1569
1570         if (!IS_ENABLED(CONFIG_IPV6))
1571                 return NULL;
1572
1573         irdma_copy_ip_htonl(laddr6.in6_u.u6_addr32, addr);
1574         if (vlan_id)
1575                 *vlan_id = 0xFFFF;      /* Match rdma_vlan_dev_vlan_id() */
1576         if (mac)
1577                 eth_zero_addr(mac);
1578
1579         rcu_read_lock();
1580         for_each_netdev_rcu (&init_net, ip_dev) {
1581                 if (ipv6_chk_addr(&init_net, &laddr6, ip_dev, 1)) {
1582                         if (vlan_id)
1583                                 *vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1584                         if (ip_dev->dev_addr && mac)
1585                                 ether_addr_copy(mac, ip_dev->dev_addr);
1586                         break;
1587                 }
1588         }
1589         rcu_read_unlock();
1590
1591         return ip_dev;
1592 }
1593
1594 /**
1595  * irdma_get_vlan_ipv4 - Returns the vlan_id for IPv4 address
1596  * @addr: local IPv4 address
1597  */
1598 u16 irdma_get_vlan_ipv4(u32 *addr)
1599 {
1600         struct net_device *netdev;
1601         u16 vlan_id = 0xFFFF;
1602
1603         netdev = ip_dev_find(&init_net, htonl(addr[0]));
1604         if (netdev) {
1605                 vlan_id = rdma_vlan_dev_vlan_id(netdev);
1606                 dev_put(netdev);
1607         }
1608
1609         return vlan_id;
1610 }
1611
1612 /**
1613  * irdma_add_mqh_6 - Adds multiple qhashes for IPv6
1614  * @iwdev: iWarp device
1615  * @cm_info: CM info for parent listen node
1616  * @cm_parent_listen_node: The parent listen node
1617  *
1618  * Adds a qhash and a child listen node for every IPv6 address
1619  * on the adapter and adds the associated qhash filter
1620  */
1621 static enum irdma_status_code
1622 irdma_add_mqh_6(struct irdma_device *iwdev, struct irdma_cm_info *cm_info,
1623                 struct irdma_cm_listener *cm_parent_listen_node)
1624 {
1625         struct net_device *ip_dev;
1626         struct inet6_dev *idev;
1627         struct inet6_ifaddr *ifp, *tmp;
1628         enum irdma_status_code ret = 0;
1629         struct irdma_cm_listener *child_listen_node;
1630         unsigned long flags;
1631
1632         rtnl_lock();
1633         for_each_netdev(&init_net, ip_dev) {
1634                 if (!(ip_dev->flags & IFF_UP))
1635                         continue;
1636
1637                 if (((rdma_vlan_dev_vlan_id(ip_dev) >= VLAN_N_VID) ||
1638                      (rdma_vlan_dev_real_dev(ip_dev) != iwdev->netdev)) &&
1639                     ip_dev != iwdev->netdev)
1640                         continue;
1641
1642                 idev = __in6_dev_get(ip_dev);
1643                 if (!idev) {
1644                         ibdev_dbg(&iwdev->ibdev, "CM: idev == NULL\n");
1645                         break;
1646                 }
1647                 list_for_each_entry_safe (ifp, tmp, &idev->addr_list, if_list) {
1648                         ibdev_dbg(&iwdev->ibdev, "CM: IP=%pI6, vlan_id=%d, MAC=%pM\n",
1649                                   &ifp->addr, rdma_vlan_dev_vlan_id(ip_dev),
1650                                   ip_dev->dev_addr);
1651                         child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_KERNEL);
1652                         ibdev_dbg(&iwdev->ibdev, "CM: Allocating child listener %p\n",
1653                                   child_listen_node);
1654                         if (!child_listen_node) {
1655                                 ibdev_dbg(&iwdev->ibdev, "CM: listener memory allocation\n");
1656                                 ret = IRDMA_ERR_NO_MEMORY;
1657                                 goto exit;
1658                         }
1659
1660                         cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1661                         cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1662                         memcpy(child_listen_node, cm_parent_listen_node,
1663                                sizeof(*child_listen_node));
1664                         irdma_copy_ip_ntohl(child_listen_node->loc_addr,
1665                                             ifp->addr.in6_u.u6_addr32);
1666                         memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1667                                sizeof(cm_info->loc_addr));
1668                         ret = irdma_manage_qhash(iwdev, cm_info,
1669                                                  IRDMA_QHASH_TYPE_TCP_SYN,
1670                                                  IRDMA_QHASH_MANAGE_TYPE_ADD,
1671                                                  NULL, true);
1672                         if (ret) {
1673                                 kfree(child_listen_node);
1674                                 continue;
1675                         }
1676
1677                         trace_irdma_add_mqh_6(iwdev, child_listen_node,
1678                                               ip_dev->dev_addr);
1679
1680                         child_listen_node->qhash_set = true;
1681                         spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1682                         list_add(&child_listen_node->child_listen_list,
1683                                  &cm_parent_listen_node->child_listen_list);
1684                         spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1685                         cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
1686                 }
1687         }
1688 exit:
1689         rtnl_unlock();
1690
1691         return ret;
1692 }
1693
1694 /**
1695  * irdma_add_mqh_4 - Adds multiple qhashes for IPv4
1696  * @iwdev: iWarp device
1697  * @cm_info: CM info for parent listen node
1698  * @cm_parent_listen_node: The parent listen node
1699  *
1700  * Adds a qhash and a child listen node for every IPv4 address
1701  * on the adapter and adds the associated qhash filter
1702  */
1703 static enum irdma_status_code
1704 irdma_add_mqh_4(struct irdma_device *iwdev, struct irdma_cm_info *cm_info,
1705                 struct irdma_cm_listener *cm_parent_listen_node)
1706 {
1707         struct net_device *ip_dev;
1708         struct in_device *idev;
1709         struct irdma_cm_listener *child_listen_node;
1710         enum irdma_status_code ret = 0;
1711         unsigned long flags;
1712         const struct in_ifaddr *ifa;
1713
1714         rtnl_lock();
1715         for_each_netdev(&init_net, ip_dev) {
1716                 if (!(ip_dev->flags & IFF_UP))
1717                         continue;
1718
1719                 if (((rdma_vlan_dev_vlan_id(ip_dev) >= VLAN_N_VID) ||
1720                      (rdma_vlan_dev_real_dev(ip_dev) != iwdev->netdev)) &&
1721                     ip_dev != iwdev->netdev)
1722                         continue;
1723
1724                 idev = in_dev_get(ip_dev);
1725                 in_dev_for_each_ifa_rtnl(ifa, idev) {
1726                         ibdev_dbg(&iwdev->ibdev,
1727                                   "CM: Allocating child CM Listener forIP=%pI4, vlan_id=%d, MAC=%pM\n",
1728                                   &ifa->ifa_address, rdma_vlan_dev_vlan_id(ip_dev),
1729                                   ip_dev->dev_addr);
1730                         child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_KERNEL);
1731                         cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
1732                         ibdev_dbg(&iwdev->ibdev, "CM: Allocating child listener %p\n",
1733                                   child_listen_node);
1734                         if (!child_listen_node) {
1735                                 ibdev_dbg(&iwdev->ibdev, "CM: listener memory allocation\n");
1736                                 in_dev_put(idev);
1737                                 ret = IRDMA_ERR_NO_MEMORY;
1738                                 goto exit;
1739                         }
1740
1741                         cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1742                         cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1743                         memcpy(child_listen_node, cm_parent_listen_node,
1744                                sizeof(*child_listen_node));
1745                         child_listen_node->loc_addr[0] =
1746                                 ntohl(ifa->ifa_address);
1747                         memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1748                                sizeof(cm_info->loc_addr));
1749                         ret = irdma_manage_qhash(iwdev, cm_info,
1750                                                  IRDMA_QHASH_TYPE_TCP_SYN,
1751                                                  IRDMA_QHASH_MANAGE_TYPE_ADD,
1752                                                  NULL, true);
1753                         if (ret) {
1754                                 kfree(child_listen_node);
1755                                 cm_parent_listen_node->cm_core
1756                                         ->stats_listen_nodes_created--;
1757                                 continue;
1758                         }
1759
1760                         trace_irdma_add_mqh_4(iwdev, child_listen_node,
1761                                               ip_dev->dev_addr);
1762
1763                         child_listen_node->qhash_set = true;
1764                         spin_lock_irqsave(&iwdev->cm_core.listen_list_lock,
1765                                           flags);
1766                         list_add(&child_listen_node->child_listen_list,
1767                                  &cm_parent_listen_node->child_listen_list);
1768                         spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1769                 }
1770                 in_dev_put(idev);
1771         }
1772 exit:
1773         rtnl_unlock();
1774
1775         return ret;
1776 }
1777
1778 /**
1779  * irdma_add_mqh - Adds multiple qhashes
1780  * @iwdev: iWarp device
1781  * @cm_info: CM info for parent listen node
1782  * @cm_listen_node: The parent listen node
1783  */
1784 static enum irdma_status_code
1785 irdma_add_mqh(struct irdma_device *iwdev, struct irdma_cm_info *cm_info,
1786               struct irdma_cm_listener *cm_listen_node)
1787 {
1788         if (cm_info->ipv4)
1789                 return irdma_add_mqh_4(iwdev, cm_info, cm_listen_node);
1790         else
1791                 return irdma_add_mqh_6(iwdev, cm_info, cm_listen_node);
1792 }
1793
1794 /**
1795  * irdma_reset_list_prep - add connection nodes slated for reset to list
1796  * @cm_core: cm's core
1797  * @listener: pointer to listener node
1798  * @reset_list: a list to which cm_node will be selected
1799  */
1800 static void irdma_reset_list_prep(struct irdma_cm_core *cm_core,
1801                                   struct irdma_cm_listener *listener,
1802                                   struct list_head *reset_list)
1803 {
1804         struct irdma_cm_node *cm_node;
1805         int bkt;
1806
1807         hash_for_each_rcu(cm_core->cm_hash_tbl, bkt, cm_node, list) {
1808                 if (cm_node->listener == listener &&
1809                     !cm_node->accelerated &&
1810                     refcount_inc_not_zero(&cm_node->refcnt))
1811                         list_add(&cm_node->reset_entry, reset_list);
1812         }
1813 }
1814
1815 /**
1816  * irdma_dec_refcnt_listen - delete listener and associated cm nodes
1817  * @cm_core: cm's core
1818  * @listener: pointer to listener node
1819  * @free_hanging_nodes: to free associated cm_nodes
1820  * @apbvt_del: flag to delete the apbvt
1821  */
1822 static int irdma_dec_refcnt_listen(struct irdma_cm_core *cm_core,
1823                                    struct irdma_cm_listener *listener,
1824                                    int free_hanging_nodes, bool apbvt_del)
1825 {
1826         int err;
1827         struct list_head *list_pos;
1828         struct list_head *list_temp;
1829         struct irdma_cm_node *cm_node;
1830         struct list_head reset_list;
1831         struct irdma_cm_info nfo;
1832         enum irdma_cm_node_state old_state;
1833         unsigned long flags;
1834
1835         trace_irdma_dec_refcnt_listen(listener, __builtin_return_address(0));
1836         /* free non-accelerated child nodes for this listener */
1837         INIT_LIST_HEAD(&reset_list);
1838         if (free_hanging_nodes) {
1839                 rcu_read_lock();
1840                 irdma_reset_list_prep(cm_core, listener, &reset_list);
1841                 rcu_read_unlock();
1842         }
1843
1844         list_for_each_safe (list_pos, list_temp, &reset_list) {
1845                 cm_node = container_of(list_pos, struct irdma_cm_node,
1846                                        reset_entry);
1847                 if (cm_node->state >= IRDMA_CM_STATE_FIN_WAIT1) {
1848                         irdma_rem_ref_cm_node(cm_node);
1849                         continue;
1850                 }
1851
1852                 irdma_cleanup_retrans_entry(cm_node);
1853                 err = irdma_send_reset(cm_node);
1854                 if (err) {
1855                         cm_node->state = IRDMA_CM_STATE_CLOSED;
1856                         ibdev_dbg(&cm_node->iwdev->ibdev,
1857                                   "CM: send reset failed\n");
1858                 } else {
1859                         old_state = cm_node->state;
1860                         cm_node->state = IRDMA_CM_STATE_LISTENER_DESTROYED;
1861                         if (old_state != IRDMA_CM_STATE_MPAREQ_RCVD)
1862                                 irdma_rem_ref_cm_node(cm_node);
1863                 }
1864         }
1865
1866         if (refcount_dec_and_test(&listener->refcnt)) {
1867                 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1868                 list_del(&listener->list);
1869                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1870
1871                 if (apbvt_del)
1872                         irdma_del_apbvt(listener->iwdev,
1873                                         listener->apbvt_entry);
1874                 memcpy(nfo.loc_addr, listener->loc_addr, sizeof(nfo.loc_addr));
1875                 nfo.loc_port = listener->loc_port;
1876                 nfo.ipv4 = listener->ipv4;
1877                 nfo.vlan_id = listener->vlan_id;
1878                 nfo.user_pri = listener->user_pri;
1879                 nfo.qh_qpid = listener->iwdev->vsi.ilq->qp_id;
1880
1881                 if (!list_empty(&listener->child_listen_list)) {
1882                         irdma_del_multiple_qhash(listener->iwdev, &nfo,
1883                                                  listener);
1884                 } else {
1885                         if (listener->qhash_set)
1886                                 irdma_manage_qhash(listener->iwdev,
1887                                                    &nfo,
1888                                                    IRDMA_QHASH_TYPE_TCP_SYN,
1889                                                    IRDMA_QHASH_MANAGE_TYPE_DELETE,
1890                                                    NULL, false);
1891                 }
1892
1893                 cm_core->stats_listen_destroyed++;
1894                 cm_core->stats_listen_nodes_destroyed++;
1895                 ibdev_dbg(&listener->iwdev->ibdev,
1896                           "CM: loc_port=0x%04x loc_addr=%pI4 cm_listen_node=%p cm_id=%p qhash_set=%d vlan_id=%d apbvt_del=%d\n",
1897                           listener->loc_port, listener->loc_addr, listener,
1898                           listener->cm_id, listener->qhash_set,
1899                           listener->vlan_id, apbvt_del);
1900                 kfree(listener);
1901                 listener = NULL;
1902                 return 0;
1903         }
1904
1905         return -EINVAL;
1906 }
1907
1908 /**
1909  * irdma_cm_del_listen - delete a listener
1910  * @cm_core: cm's core
1911  * @listener: passive connection's listener
1912  * @apbvt_del: flag to delete apbvt
1913  */
1914 static int irdma_cm_del_listen(struct irdma_cm_core *cm_core,
1915                                struct irdma_cm_listener *listener,
1916                                bool apbvt_del)
1917 {
1918         listener->listener_state = IRDMA_CM_LISTENER_PASSIVE_STATE;
1919         listener->cm_id = NULL;
1920
1921         return irdma_dec_refcnt_listen(cm_core, listener, 1, apbvt_del);
1922 }
1923
1924 /**
1925  * irdma_addr_resolve_neigh - resolve neighbor address
1926  * @iwdev: iwarp device structure
1927  * @src_ip: local ip address
1928  * @dst_ip: remote ip address
1929  * @arpindex: if there is an arp entry
1930  */
1931 static int irdma_addr_resolve_neigh(struct irdma_device *iwdev, u32 src_ip,
1932                                     u32 dst_ip, int arpindex)
1933 {
1934         struct rtable *rt;
1935         struct neighbour *neigh;
1936         int rc = arpindex;
1937         __be32 dst_ipaddr = htonl(dst_ip);
1938         __be32 src_ipaddr = htonl(src_ip);
1939
1940         rt = ip_route_output(&init_net, dst_ipaddr, src_ipaddr, 0, 0);
1941         if (IS_ERR(rt)) {
1942                 ibdev_dbg(&iwdev->ibdev, "CM: ip_route_output fail\n");
1943                 return -EINVAL;
1944         }
1945
1946         neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr);
1947         if (!neigh)
1948                 goto exit;
1949
1950         if (neigh->nud_state & NUD_VALID)
1951                 rc = irdma_add_arp(iwdev->rf, &dst_ip, true, neigh->ha);
1952         else
1953                 neigh_event_send(neigh, NULL);
1954         if (neigh)
1955                 neigh_release(neigh);
1956 exit:
1957         ip_rt_put(rt);
1958
1959         return rc;
1960 }
1961
1962 /**
1963  * irdma_get_dst_ipv6 - get destination cache entry via ipv6 lookup
1964  * @src_addr: local ipv6 sock address
1965  * @dst_addr: destination ipv6 sock address
1966  */
1967 static struct dst_entry *irdma_get_dst_ipv6(struct sockaddr_in6 *src_addr,
1968                                             struct sockaddr_in6 *dst_addr)
1969 {
1970         struct dst_entry *dst = NULL;
1971
1972         if ((IS_ENABLED(CONFIG_IPV6))) {
1973                 struct flowi6 fl6 = {};
1974
1975                 fl6.daddr = dst_addr->sin6_addr;
1976                 fl6.saddr = src_addr->sin6_addr;
1977                 if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
1978                         fl6.flowi6_oif = dst_addr->sin6_scope_id;
1979
1980                 dst = ip6_route_output(&init_net, NULL, &fl6);
1981         }
1982
1983         return dst;
1984 }
1985
1986 /**
1987  * irdma_addr_resolve_neigh_ipv6 - resolve neighbor ipv6 address
1988  * @iwdev: iwarp device structure
1989  * @src: local ip address
1990  * @dest: remote ip address
1991  * @arpindex: if there is an arp entry
1992  */
1993 static int irdma_addr_resolve_neigh_ipv6(struct irdma_device *iwdev, u32 *src,
1994                                          u32 *dest, int arpindex)
1995 {
1996         struct neighbour *neigh;
1997         int rc = arpindex;
1998         struct dst_entry *dst;
1999         struct sockaddr_in6 dst_addr = {};
2000         struct sockaddr_in6 src_addr = {};
2001
2002         dst_addr.sin6_family = AF_INET6;
2003         irdma_copy_ip_htonl(dst_addr.sin6_addr.in6_u.u6_addr32, dest);
2004         src_addr.sin6_family = AF_INET6;
2005         irdma_copy_ip_htonl(src_addr.sin6_addr.in6_u.u6_addr32, src);
2006         dst = irdma_get_dst_ipv6(&src_addr, &dst_addr);
2007         if (!dst || dst->error) {
2008                 if (dst) {
2009                         dst_release(dst);
2010                         ibdev_dbg(&iwdev->ibdev,
2011                                   "CM: ip6_route_output returned dst->error = %d\n",
2012                                   dst->error);
2013                 }
2014                 return -EINVAL;
2015         }
2016
2017         neigh = dst_neigh_lookup(dst, dst_addr.sin6_addr.in6_u.u6_addr32);
2018         if (!neigh)
2019                 goto exit;
2020
2021         ibdev_dbg(&iwdev->ibdev, "CM: dst_neigh_lookup MAC=%pM\n",
2022                   neigh->ha);
2023
2024         trace_irdma_addr_resolve(iwdev, neigh->ha);
2025
2026         if (neigh->nud_state & NUD_VALID)
2027                 rc = irdma_add_arp(iwdev->rf, dest, false, neigh->ha);
2028         else
2029                 neigh_event_send(neigh, NULL);
2030         if (neigh)
2031                 neigh_release(neigh);
2032 exit:
2033         dst_release(dst);
2034
2035         return rc;
2036 }
2037
2038 /**
2039  * irdma_find_node - find a cm node that matches the reference cm node
2040  * @cm_core: cm's core
2041  * @rem_port: remote tcp port num
2042  * @rem_addr: remote ip addr
2043  * @loc_port: local tcp port num
2044  * @loc_addr: local ip addr
2045  * @vlan_id: local VLAN ID
2046  */
2047 struct irdma_cm_node *irdma_find_node(struct irdma_cm_core *cm_core,
2048                                       u16 rem_port, u32 *rem_addr, u16 loc_port,
2049                                       u32 *loc_addr, u16 vlan_id)
2050 {
2051         struct irdma_cm_node *cm_node;
2052         u32 key = (rem_port << 16) | loc_port;
2053
2054         rcu_read_lock();
2055         hash_for_each_possible_rcu(cm_core->cm_hash_tbl, cm_node, list, key) {
2056                 if (cm_node->vlan_id == vlan_id &&
2057                     cm_node->loc_port == loc_port && cm_node->rem_port == rem_port &&
2058                     !memcmp(cm_node->loc_addr, loc_addr, sizeof(cm_node->loc_addr)) &&
2059                     !memcmp(cm_node->rem_addr, rem_addr, sizeof(cm_node->rem_addr))) {
2060                         if (!refcount_inc_not_zero(&cm_node->refcnt))
2061                                 goto exit;
2062                         rcu_read_unlock();
2063                         trace_irdma_find_node(cm_node, 0, NULL);
2064                         return cm_node;
2065                 }
2066         }
2067
2068 exit:
2069         rcu_read_unlock();
2070
2071         /* no owner node */
2072         return NULL;
2073 }
2074
2075 /**
2076  * irdma_add_hte_node - add a cm node to the hash table
2077  * @cm_core: cm's core
2078  * @cm_node: connection's node
2079  */
2080 static void irdma_add_hte_node(struct irdma_cm_core *cm_core,
2081                                struct irdma_cm_node *cm_node)
2082 {
2083         unsigned long flags;
2084         u32 key = (cm_node->rem_port << 16) | cm_node->loc_port;
2085
2086         spin_lock_irqsave(&cm_core->ht_lock, flags);
2087         hash_add_rcu(cm_core->cm_hash_tbl, &cm_node->list, key);
2088         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
2089 }
2090
2091 /**
2092  * irdma_ipv4_is_lpb - check if loopback
2093  * @loc_addr: local addr to compare
2094  * @rem_addr: remote address
2095  */
2096 bool irdma_ipv4_is_lpb(u32 loc_addr, u32 rem_addr)
2097 {
2098         return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr);
2099 }
2100
2101 /**
2102  * irdma_ipv6_is_lpb - check if loopback
2103  * @loc_addr: local addr to compare
2104  * @rem_addr: remote address
2105  */
2106 bool irdma_ipv6_is_lpb(u32 *loc_addr, u32 *rem_addr)
2107 {
2108         struct in6_addr raddr6;
2109
2110         irdma_copy_ip_htonl(raddr6.in6_u.u6_addr32, rem_addr);
2111
2112         return !memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6);
2113 }
2114
2115 /**
2116  * irdma_cm_create_ah - create a cm address handle
2117  * @cm_node: The connection manager node to create AH for
2118  * @wait: Provides option to wait for ah creation or not
2119  */
2120 static int irdma_cm_create_ah(struct irdma_cm_node *cm_node, bool wait)
2121 {
2122         struct irdma_ah_info ah_info = {};
2123         struct irdma_device *iwdev = cm_node->iwdev;
2124
2125         ether_addr_copy(ah_info.mac_addr, iwdev->netdev->dev_addr);
2126
2127         ah_info.hop_ttl = 0x40;
2128         ah_info.tc_tos = cm_node->tos;
2129         ah_info.vsi = &iwdev->vsi;
2130
2131         if (cm_node->ipv4) {
2132                 ah_info.ipv4_valid = true;
2133                 ah_info.dest_ip_addr[0] = cm_node->rem_addr[0];
2134                 ah_info.src_ip_addr[0] = cm_node->loc_addr[0];
2135                 ah_info.do_lpbk = irdma_ipv4_is_lpb(ah_info.src_ip_addr[0],
2136                                                     ah_info.dest_ip_addr[0]);
2137         } else {
2138                 memcpy(ah_info.dest_ip_addr, cm_node->rem_addr,
2139                        sizeof(ah_info.dest_ip_addr));
2140                 memcpy(ah_info.src_ip_addr, cm_node->loc_addr,
2141                        sizeof(ah_info.src_ip_addr));
2142                 ah_info.do_lpbk = irdma_ipv6_is_lpb(ah_info.src_ip_addr,
2143                                                     ah_info.dest_ip_addr);
2144         }
2145
2146         ah_info.vlan_tag = cm_node->vlan_id;
2147         if (cm_node->vlan_id < VLAN_N_VID) {
2148                 ah_info.insert_vlan_tag = 1;
2149                 ah_info.vlan_tag |= cm_node->user_pri << VLAN_PRIO_SHIFT;
2150         }
2151
2152         ah_info.dst_arpindex =
2153                 irdma_arp_table(iwdev->rf, ah_info.dest_ip_addr,
2154                                 ah_info.ipv4_valid, NULL, IRDMA_ARP_RESOLVE);
2155
2156         if (irdma_puda_create_ah(&iwdev->rf->sc_dev, &ah_info, wait,
2157                                  IRDMA_PUDA_RSRC_TYPE_ILQ, cm_node,
2158                                  &cm_node->ah))
2159                 return -ENOMEM;
2160
2161         trace_irdma_create_ah(cm_node);
2162         return 0;
2163 }
2164
2165 /**
2166  * irdma_cm_free_ah - free a cm address handle
2167  * @cm_node: The connection manager node to create AH for
2168  */
2169 static void irdma_cm_free_ah(struct irdma_cm_node *cm_node)
2170 {
2171         struct irdma_device *iwdev = cm_node->iwdev;
2172
2173         trace_irdma_cm_free_ah(cm_node);
2174         irdma_puda_free_ah(&iwdev->rf->sc_dev, cm_node->ah);
2175         cm_node->ah = NULL;
2176 }
2177
2178 /**
2179  * irdma_make_cm_node - create a new instance of a cm node
2180  * @cm_core: cm's core
2181  * @iwdev: iwarp device structure
2182  * @cm_info: quad info for connection
2183  * @listener: passive connection's listener
2184  */
2185 static struct irdma_cm_node *
2186 irdma_make_cm_node(struct irdma_cm_core *cm_core, struct irdma_device *iwdev,
2187                    struct irdma_cm_info *cm_info,
2188                    struct irdma_cm_listener *listener)
2189 {
2190         struct irdma_cm_node *cm_node;
2191         int oldarpindex;
2192         int arpindex;
2193         struct net_device *netdev = iwdev->netdev;
2194
2195         /* create an hte and cm_node for this instance */
2196         cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
2197         if (!cm_node)
2198                 return NULL;
2199
2200         /* set our node specific transport info */
2201         cm_node->ipv4 = cm_info->ipv4;
2202         cm_node->vlan_id = cm_info->vlan_id;
2203         if (cm_node->vlan_id >= VLAN_N_VID && iwdev->dcb)
2204                 cm_node->vlan_id = 0;
2205         cm_node->tos = cm_info->tos;
2206         cm_node->user_pri = cm_info->user_pri;
2207         if (listener) {
2208                 if (listener->tos != cm_info->tos)
2209                         ibdev_warn(&iwdev->ibdev,
2210                                    "application TOS[%d] and remote client TOS[%d] mismatch\n",
2211                                    listener->tos, cm_info->tos);
2212                 cm_node->tos = max(listener->tos, cm_info->tos);
2213                 cm_node->user_pri = rt_tos2priority(cm_node->tos);
2214                 ibdev_dbg(&iwdev->ibdev,
2215                           "DCB: listener: TOS:[%d] UP:[%d]\n", cm_node->tos,
2216                           cm_node->user_pri);
2217                 trace_irdma_listener_tos(iwdev, cm_node->tos,
2218                                          cm_node->user_pri);
2219         }
2220         memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr));
2221         memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr));
2222         cm_node->loc_port = cm_info->loc_port;
2223         cm_node->rem_port = cm_info->rem_port;
2224
2225         cm_node->mpa_frame_rev = IRDMA_CM_DEFAULT_MPA_VER;
2226         cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
2227         cm_node->iwdev = iwdev;
2228         cm_node->dev = &iwdev->rf->sc_dev;
2229
2230         cm_node->ird_size = cm_node->dev->hw_attrs.max_hw_ird;
2231         cm_node->ord_size = cm_node->dev->hw_attrs.max_hw_ord;
2232
2233         cm_node->listener = listener;
2234         cm_node->cm_id = cm_info->cm_id;
2235         ether_addr_copy(cm_node->loc_mac, netdev->dev_addr);
2236         spin_lock_init(&cm_node->retrans_list_lock);
2237         cm_node->ack_rcvd = false;
2238
2239         init_completion(&cm_node->establish_comp);
2240         refcount_set(&cm_node->refcnt, 1);
2241         /* associate our parent CM core */
2242         cm_node->cm_core = cm_core;
2243         cm_node->tcp_cntxt.loc_id = IRDMA_CM_DEFAULT_LOCAL_ID;
2244         cm_node->tcp_cntxt.rcv_wscale = iwdev->rcv_wscale;
2245         cm_node->tcp_cntxt.rcv_wnd = iwdev->rcv_wnd >> cm_node->tcp_cntxt.rcv_wscale;
2246         if (cm_node->ipv4) {
2247                 cm_node->tcp_cntxt.loc_seq_num = secure_tcp_seq(htonl(cm_node->loc_addr[0]),
2248                                                                 htonl(cm_node->rem_addr[0]),
2249                                                                 htons(cm_node->loc_port),
2250                                                                 htons(cm_node->rem_port));
2251                 cm_node->tcp_cntxt.mss = iwdev->vsi.mtu - IRDMA_MTU_TO_MSS_IPV4;
2252         } else if (IS_ENABLED(CONFIG_IPV6)) {
2253                 __be32 loc[4] = {
2254                         htonl(cm_node->loc_addr[0]), htonl(cm_node->loc_addr[1]),
2255                         htonl(cm_node->loc_addr[2]), htonl(cm_node->loc_addr[3])
2256                 };
2257                 __be32 rem[4] = {
2258                         htonl(cm_node->rem_addr[0]), htonl(cm_node->rem_addr[1]),
2259                         htonl(cm_node->rem_addr[2]), htonl(cm_node->rem_addr[3])
2260                 };
2261                 cm_node->tcp_cntxt.loc_seq_num = secure_tcpv6_seq(loc, rem,
2262                                                                   htons(cm_node->loc_port),
2263                                                                   htons(cm_node->rem_port));
2264                 cm_node->tcp_cntxt.mss = iwdev->vsi.mtu - IRDMA_MTU_TO_MSS_IPV6;
2265         }
2266
2267         if ((cm_node->ipv4 &&
2268              irdma_ipv4_is_lpb(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
2269             (!cm_node->ipv4 &&
2270              irdma_ipv6_is_lpb(cm_node->loc_addr, cm_node->rem_addr))) {
2271                 cm_node->do_lpb = true;
2272                 arpindex = irdma_arp_table(iwdev->rf, cm_node->rem_addr,
2273                                            cm_node->ipv4, NULL,
2274                                            IRDMA_ARP_RESOLVE);
2275         } else {
2276                 oldarpindex = irdma_arp_table(iwdev->rf, cm_node->rem_addr,
2277                                               cm_node->ipv4, NULL,
2278                                               IRDMA_ARP_RESOLVE);
2279                 if (cm_node->ipv4)
2280                         arpindex = irdma_addr_resolve_neigh(iwdev,
2281                                                             cm_info->loc_addr[0],
2282                                                             cm_info->rem_addr[0],
2283                                                             oldarpindex);
2284                 else if (IS_ENABLED(CONFIG_IPV6))
2285                         arpindex = irdma_addr_resolve_neigh_ipv6(iwdev,
2286                                                                  cm_info->loc_addr,
2287                                                                  cm_info->rem_addr,
2288                                                                  oldarpindex);
2289                 else
2290                         arpindex = -EINVAL;
2291         }
2292
2293         if (arpindex < 0)
2294                 goto err;
2295
2296         ether_addr_copy(cm_node->rem_mac,
2297                         iwdev->rf->arp_table[arpindex].mac_addr);
2298         irdma_add_hte_node(cm_core, cm_node);
2299         cm_core->stats_nodes_created++;
2300         return cm_node;
2301
2302 err:
2303         kfree(cm_node);
2304
2305         return NULL;
2306 }
2307
2308 static void irdma_cm_node_free_cb(struct rcu_head *rcu_head)
2309 {
2310         struct irdma_cm_node *cm_node =
2311                             container_of(rcu_head, struct irdma_cm_node, rcu_head);
2312         struct irdma_cm_core *cm_core = cm_node->cm_core;
2313         struct irdma_qp *iwqp;
2314         struct irdma_cm_info nfo;
2315
2316         /* if the node is destroyed before connection was accelerated */
2317         if (!cm_node->accelerated && cm_node->accept_pend) {
2318                 ibdev_dbg(&cm_node->iwdev->ibdev,
2319                           "CM: node destroyed before established\n");
2320                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
2321         }
2322         if (cm_node->close_entry)
2323                 irdma_handle_close_entry(cm_node, 0);
2324         if (cm_node->listener) {
2325                 irdma_dec_refcnt_listen(cm_core, cm_node->listener, 0, true);
2326         } else {
2327                 if (cm_node->apbvt_set) {
2328                         irdma_del_apbvt(cm_node->iwdev, cm_node->apbvt_entry);
2329                         cm_node->apbvt_set = 0;
2330                 }
2331                 irdma_get_addr_info(cm_node, &nfo);
2332                 if (cm_node->qhash_set) {
2333                         nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id;
2334                         irdma_manage_qhash(cm_node->iwdev, &nfo,
2335                                            IRDMA_QHASH_TYPE_TCP_ESTABLISHED,
2336                                            IRDMA_QHASH_MANAGE_TYPE_DELETE, NULL,
2337                                            false);
2338                         cm_node->qhash_set = 0;
2339                 }
2340         }
2341
2342         iwqp = cm_node->iwqp;
2343         if (iwqp) {
2344                 cm_node->cm_id->rem_ref(cm_node->cm_id);
2345                 cm_node->cm_id = NULL;
2346                 iwqp->cm_id = NULL;
2347                 irdma_qp_rem_ref(&iwqp->ibqp);
2348                 cm_node->iwqp = NULL;
2349         } else if (cm_node->qhash_set) {
2350                 irdma_get_addr_info(cm_node, &nfo);
2351                 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id;
2352                 irdma_manage_qhash(cm_node->iwdev, &nfo,
2353                                    IRDMA_QHASH_TYPE_TCP_ESTABLISHED,
2354                                    IRDMA_QHASH_MANAGE_TYPE_DELETE, NULL, false);
2355                 cm_node->qhash_set = 0;
2356         }
2357
2358         cm_core->cm_free_ah(cm_node);
2359         kfree(cm_node);
2360 }
2361
2362 /**
2363  * irdma_rem_ref_cm_node - destroy an instance of a cm node
2364  * @cm_node: connection's node
2365  */
2366 void irdma_rem_ref_cm_node(struct irdma_cm_node *cm_node)
2367 {
2368         struct irdma_cm_core *cm_core = cm_node->cm_core;
2369         unsigned long flags;
2370
2371         trace_irdma_rem_ref_cm_node(cm_node, 0, __builtin_return_address(0));
2372         spin_lock_irqsave(&cm_core->ht_lock, flags);
2373
2374         if (!refcount_dec_and_test(&cm_node->refcnt)) {
2375                 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
2376                 return;
2377         }
2378         if (cm_node->iwqp) {
2379                 cm_node->iwqp->cm_node = NULL;
2380                 cm_node->iwqp->cm_id = NULL;
2381         }
2382         hash_del_rcu(&cm_node->list);
2383         cm_node->cm_core->stats_nodes_destroyed++;
2384
2385         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
2386
2387         /* wait for all list walkers to exit their grace period */
2388         call_rcu(&cm_node->rcu_head, irdma_cm_node_free_cb);
2389 }
2390
2391 /**
2392  * irdma_handle_fin_pkt - FIN packet received
2393  * @cm_node: connection's node
2394  */
2395 static void irdma_handle_fin_pkt(struct irdma_cm_node *cm_node)
2396 {
2397         switch (cm_node->state) {
2398         case IRDMA_CM_STATE_SYN_RCVD:
2399         case IRDMA_CM_STATE_SYN_SENT:
2400         case IRDMA_CM_STATE_ESTABLISHED:
2401         case IRDMA_CM_STATE_MPAREJ_RCVD:
2402                 cm_node->tcp_cntxt.rcv_nxt++;
2403                 irdma_cleanup_retrans_entry(cm_node);
2404                 cm_node->state = IRDMA_CM_STATE_LAST_ACK;
2405                 irdma_send_fin(cm_node);
2406                 break;
2407         case IRDMA_CM_STATE_MPAREQ_SENT:
2408                 irdma_create_event(cm_node, IRDMA_CM_EVENT_ABORTED);
2409                 cm_node->tcp_cntxt.rcv_nxt++;
2410                 irdma_cleanup_retrans_entry(cm_node);
2411                 cm_node->state = IRDMA_CM_STATE_CLOSED;
2412                 refcount_inc(&cm_node->refcnt);
2413                 irdma_send_reset(cm_node);
2414                 break;
2415         case IRDMA_CM_STATE_FIN_WAIT1:
2416                 cm_node->tcp_cntxt.rcv_nxt++;
2417                 irdma_cleanup_retrans_entry(cm_node);
2418                 cm_node->state = IRDMA_CM_STATE_CLOSING;
2419                 irdma_send_ack(cm_node);
2420                 /*
2421                  * Wait for ACK as this is simultaneous close.
2422                  * After we receive ACK, do not send anything.
2423                  * Just rm the node.
2424                  */
2425                 break;
2426         case IRDMA_CM_STATE_FIN_WAIT2:
2427                 cm_node->tcp_cntxt.rcv_nxt++;
2428                 irdma_cleanup_retrans_entry(cm_node);
2429                 cm_node->state = IRDMA_CM_STATE_TIME_WAIT;
2430                 irdma_send_ack(cm_node);
2431                 irdma_schedule_cm_timer(cm_node, NULL, IRDMA_TIMER_TYPE_CLOSE,
2432                                         1, 0);
2433                 break;
2434         case IRDMA_CM_STATE_TIME_WAIT:
2435                 cm_node->tcp_cntxt.rcv_nxt++;
2436                 irdma_cleanup_retrans_entry(cm_node);
2437                 cm_node->state = IRDMA_CM_STATE_CLOSED;
2438                 irdma_rem_ref_cm_node(cm_node);
2439                 break;
2440         case IRDMA_CM_STATE_OFFLOADED:
2441         default:
2442                 ibdev_dbg(&cm_node->iwdev->ibdev,
2443                           "CM: bad state node state = %d\n", cm_node->state);
2444                 break;
2445         }
2446 }
2447
2448 /**
2449  * irdma_handle_rst_pkt - process received RST packet
2450  * @cm_node: connection's node
2451  * @rbuf: receive buffer
2452  */
2453 static void irdma_handle_rst_pkt(struct irdma_cm_node *cm_node,
2454                                  struct irdma_puda_buf *rbuf)
2455 {
2456         ibdev_dbg(&cm_node->iwdev->ibdev,
2457                   "CM: caller: %pS cm_node=%p state=%d rem_port=0x%04x loc_port=0x%04x rem_addr=%pI4 loc_addr=%pI4\n",
2458                   __builtin_return_address(0), cm_node, cm_node->state,
2459                   cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr,
2460                   cm_node->loc_addr);
2461
2462         irdma_cleanup_retrans_entry(cm_node);
2463         switch (cm_node->state) {
2464         case IRDMA_CM_STATE_SYN_SENT:
2465         case IRDMA_CM_STATE_MPAREQ_SENT:
2466                 switch (cm_node->mpa_frame_rev) {
2467                 case IETF_MPA_V2:
2468                         /* Drop down to MPA_V1*/
2469                         cm_node->mpa_frame_rev = IETF_MPA_V1;
2470                         /* send a syn and goto syn sent state */
2471                         cm_node->state = IRDMA_CM_STATE_SYN_SENT;
2472                         if (irdma_send_syn(cm_node, 0))
2473                                 irdma_active_open_err(cm_node, false);
2474                         break;
2475                 case IETF_MPA_V1:
2476                 default:
2477                         irdma_active_open_err(cm_node, false);
2478                         break;
2479                 }
2480                 break;
2481         case IRDMA_CM_STATE_MPAREQ_RCVD:
2482                 atomic_inc(&cm_node->passive_state);
2483                 break;
2484         case IRDMA_CM_STATE_ESTABLISHED:
2485         case IRDMA_CM_STATE_SYN_RCVD:
2486         case IRDMA_CM_STATE_LISTENING:
2487                 irdma_passive_open_err(cm_node, false);
2488                 break;
2489         case IRDMA_CM_STATE_OFFLOADED:
2490                 irdma_active_open_err(cm_node, false);
2491                 break;
2492         case IRDMA_CM_STATE_CLOSED:
2493                 break;
2494         case IRDMA_CM_STATE_FIN_WAIT2:
2495         case IRDMA_CM_STATE_FIN_WAIT1:
2496         case IRDMA_CM_STATE_LAST_ACK:
2497         case IRDMA_CM_STATE_TIME_WAIT:
2498                 cm_node->state = IRDMA_CM_STATE_CLOSED;
2499                 irdma_rem_ref_cm_node(cm_node);
2500                 break;
2501         default:
2502                 break;
2503         }
2504 }
2505
2506 /**
2507  * irdma_handle_rcv_mpa - Process a recv'd mpa buffer
2508  * @cm_node: connection's node
2509  * @rbuf: receive buffer
2510  */
2511 static void irdma_handle_rcv_mpa(struct irdma_cm_node *cm_node,
2512                                  struct irdma_puda_buf *rbuf)
2513 {
2514         int err;
2515         int datasize = rbuf->datalen;
2516         u8 *dataloc = rbuf->data;
2517
2518         enum irdma_cm_event_type type = IRDMA_CM_EVENT_UNKNOWN;
2519         u32 res_type;
2520
2521         err = irdma_parse_mpa(cm_node, dataloc, &res_type, datasize);
2522         if (err) {
2523                 if (cm_node->state == IRDMA_CM_STATE_MPAREQ_SENT)
2524                         irdma_active_open_err(cm_node, true);
2525                 else
2526                         irdma_passive_open_err(cm_node, true);
2527                 return;
2528         }
2529
2530         switch (cm_node->state) {
2531         case IRDMA_CM_STATE_ESTABLISHED:
2532                 if (res_type == IRDMA_MPA_REQUEST_REJECT)
2533                         ibdev_dbg(&cm_node->iwdev->ibdev,
2534                                   "CM: state for reject\n");
2535                 cm_node->state = IRDMA_CM_STATE_MPAREQ_RCVD;
2536                 type = IRDMA_CM_EVENT_MPA_REQ;
2537                 irdma_send_ack(cm_node); /* ACK received MPA request */
2538                 atomic_set(&cm_node->passive_state,
2539                            IRDMA_PASSIVE_STATE_INDICATED);
2540                 break;
2541         case IRDMA_CM_STATE_MPAREQ_SENT:
2542                 irdma_cleanup_retrans_entry(cm_node);
2543                 if (res_type == IRDMA_MPA_REQUEST_REJECT) {
2544                         type = IRDMA_CM_EVENT_MPA_REJECT;
2545                         cm_node->state = IRDMA_CM_STATE_MPAREJ_RCVD;
2546                 } else {
2547                         type = IRDMA_CM_EVENT_CONNECTED;
2548                         cm_node->state = IRDMA_CM_STATE_OFFLOADED;
2549                 }
2550                 irdma_send_ack(cm_node);
2551                 break;
2552         default:
2553                 ibdev_dbg(&cm_node->iwdev->ibdev,
2554                           "CM: wrong cm_node state =%d\n", cm_node->state);
2555                 break;
2556         }
2557         irdma_create_event(cm_node, type);
2558 }
2559
2560 /**
2561  * irdma_check_syn - Check for error on received syn ack
2562  * @cm_node: connection's node
2563  * @tcph: pointer tcp header
2564  */
2565 static int irdma_check_syn(struct irdma_cm_node *cm_node, struct tcphdr *tcph)
2566 {
2567         if (ntohl(tcph->ack_seq) != cm_node->tcp_cntxt.loc_seq_num) {
2568                 irdma_active_open_err(cm_node, true);
2569                 return 1;
2570         }
2571
2572         return 0;
2573 }
2574
2575 /**
2576  * irdma_check_seq - check seq numbers if OK
2577  * @cm_node: connection's node
2578  * @tcph: pointer tcp header
2579  */
2580 static int irdma_check_seq(struct irdma_cm_node *cm_node, struct tcphdr *tcph)
2581 {
2582         u32 seq;
2583         u32 ack_seq;
2584         u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
2585         u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
2586         u32 rcv_wnd;
2587         int err = 0;
2588
2589         seq = ntohl(tcph->seq);
2590         ack_seq = ntohl(tcph->ack_seq);
2591         rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
2592         if (ack_seq != loc_seq_num ||
2593             !between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
2594                 err = -1;
2595         if (err)
2596                 ibdev_dbg(&cm_node->iwdev->ibdev,
2597                           "CM: seq number err\n");
2598
2599         return err;
2600 }
2601
2602 void irdma_add_conn_est_qh(struct irdma_cm_node *cm_node)
2603 {
2604         struct irdma_cm_info nfo;
2605
2606         irdma_get_addr_info(cm_node, &nfo);
2607         nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id;
2608         irdma_manage_qhash(cm_node->iwdev, &nfo,
2609                            IRDMA_QHASH_TYPE_TCP_ESTABLISHED,
2610                            IRDMA_QHASH_MANAGE_TYPE_ADD,
2611                            cm_node, false);
2612         cm_node->qhash_set = true;
2613 }
2614
2615 /**
2616  * irdma_handle_syn_pkt - is for Passive node
2617  * @cm_node: connection's node
2618  * @rbuf: receive buffer
2619  */
2620 static void irdma_handle_syn_pkt(struct irdma_cm_node *cm_node,
2621                                  struct irdma_puda_buf *rbuf)
2622 {
2623         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2624         int err;
2625         u32 inc_sequence;
2626         int optionsize;
2627
2628         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2629         inc_sequence = ntohl(tcph->seq);
2630
2631         switch (cm_node->state) {
2632         case IRDMA_CM_STATE_SYN_SENT:
2633         case IRDMA_CM_STATE_MPAREQ_SENT:
2634                 /* Rcvd syn on active open connection */
2635                 irdma_active_open_err(cm_node, 1);
2636                 break;
2637         case IRDMA_CM_STATE_LISTENING:
2638                 /* Passive OPEN */
2639                 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
2640                     cm_node->listener->backlog) {
2641                         cm_node->cm_core->stats_backlog_drops++;
2642                         irdma_passive_open_err(cm_node, false);
2643                         break;
2644                 }
2645                 err = irdma_handle_tcp_options(cm_node, tcph, optionsize, 1);
2646                 if (err) {
2647                         irdma_passive_open_err(cm_node, false);
2648                         /* drop pkt */
2649                         break;
2650                 }
2651                 err = cm_node->cm_core->cm_create_ah(cm_node, false);
2652                 if (err) {
2653                         irdma_passive_open_err(cm_node, false);
2654                         /* drop pkt */
2655                         break;
2656                 }
2657                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2658                 cm_node->accept_pend = 1;
2659                 atomic_inc(&cm_node->listener->pend_accepts_cnt);
2660
2661                 cm_node->state = IRDMA_CM_STATE_SYN_RCVD;
2662                 break;
2663         case IRDMA_CM_STATE_CLOSED:
2664                 irdma_cleanup_retrans_entry(cm_node);
2665                 refcount_inc(&cm_node->refcnt);
2666                 irdma_send_reset(cm_node);
2667                 break;
2668         case IRDMA_CM_STATE_OFFLOADED:
2669         case IRDMA_CM_STATE_ESTABLISHED:
2670         case IRDMA_CM_STATE_FIN_WAIT1:
2671         case IRDMA_CM_STATE_FIN_WAIT2:
2672         case IRDMA_CM_STATE_MPAREQ_RCVD:
2673         case IRDMA_CM_STATE_LAST_ACK:
2674         case IRDMA_CM_STATE_CLOSING:
2675         case IRDMA_CM_STATE_UNKNOWN:
2676         default:
2677                 break;
2678         }
2679 }
2680
2681 /**
2682  * irdma_handle_synack_pkt - Process SYN+ACK packet (active side)
2683  * @cm_node: connection's node
2684  * @rbuf: receive buffer
2685  */
2686 static void irdma_handle_synack_pkt(struct irdma_cm_node *cm_node,
2687                                     struct irdma_puda_buf *rbuf)
2688 {
2689         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2690         int err;
2691         u32 inc_sequence;
2692         int optionsize;
2693
2694         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2695         inc_sequence = ntohl(tcph->seq);
2696         switch (cm_node->state) {
2697         case IRDMA_CM_STATE_SYN_SENT:
2698                 irdma_cleanup_retrans_entry(cm_node);
2699                 /* active open */
2700                 if (irdma_check_syn(cm_node, tcph)) {
2701                         ibdev_dbg(&cm_node->iwdev->ibdev,
2702                                   "CM: check syn fail\n");
2703                         return;
2704                 }
2705                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2706                 /* setup options */
2707                 err = irdma_handle_tcp_options(cm_node, tcph, optionsize, 0);
2708                 if (err) {
2709                         ibdev_dbg(&cm_node->iwdev->ibdev,
2710                                   "CM: cm_node=%p tcp_options failed\n",
2711                                   cm_node);
2712                         break;
2713                 }
2714                 irdma_cleanup_retrans_entry(cm_node);
2715                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2716                 irdma_send_ack(cm_node); /* ACK  for the syn_ack */
2717                 err = irdma_send_mpa_request(cm_node);
2718                 if (err) {
2719                         ibdev_dbg(&cm_node->iwdev->ibdev,
2720                                   "CM: cm_node=%p irdma_send_mpa_request failed\n",
2721                                   cm_node);
2722                         break;
2723                 }
2724                 cm_node->state = IRDMA_CM_STATE_MPAREQ_SENT;
2725                 break;
2726         case IRDMA_CM_STATE_MPAREQ_RCVD:
2727                 irdma_passive_open_err(cm_node, true);
2728                 break;
2729         case IRDMA_CM_STATE_LISTENING:
2730                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2731                 irdma_cleanup_retrans_entry(cm_node);
2732                 cm_node->state = IRDMA_CM_STATE_CLOSED;
2733                 irdma_send_reset(cm_node);
2734                 break;
2735         case IRDMA_CM_STATE_CLOSED:
2736                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2737                 irdma_cleanup_retrans_entry(cm_node);
2738                 refcount_inc(&cm_node->refcnt);
2739                 irdma_send_reset(cm_node);
2740                 break;
2741         case IRDMA_CM_STATE_ESTABLISHED:
2742         case IRDMA_CM_STATE_FIN_WAIT1:
2743         case IRDMA_CM_STATE_FIN_WAIT2:
2744         case IRDMA_CM_STATE_LAST_ACK:
2745         case IRDMA_CM_STATE_OFFLOADED:
2746         case IRDMA_CM_STATE_CLOSING:
2747         case IRDMA_CM_STATE_UNKNOWN:
2748         case IRDMA_CM_STATE_MPAREQ_SENT:
2749         default:
2750                 break;
2751         }
2752 }
2753
2754 /**
2755  * irdma_handle_ack_pkt - process packet with ACK
2756  * @cm_node: connection's node
2757  * @rbuf: receive buffer
2758  */
2759 static int irdma_handle_ack_pkt(struct irdma_cm_node *cm_node,
2760                                 struct irdma_puda_buf *rbuf)
2761 {
2762         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2763         u32 inc_sequence;
2764         int ret;
2765         int optionsize;
2766         u32 datasize = rbuf->datalen;
2767
2768         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2769
2770         if (irdma_check_seq(cm_node, tcph))
2771                 return -EINVAL;
2772
2773         inc_sequence = ntohl(tcph->seq);
2774         switch (cm_node->state) {
2775         case IRDMA_CM_STATE_SYN_RCVD:
2776                 irdma_cleanup_retrans_entry(cm_node);
2777                 ret = irdma_handle_tcp_options(cm_node, tcph, optionsize, 1);
2778                 if (ret)
2779                         return ret;
2780                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2781                 cm_node->state = IRDMA_CM_STATE_ESTABLISHED;
2782                 if (datasize) {
2783                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2784                         irdma_handle_rcv_mpa(cm_node, rbuf);
2785                 }
2786                 break;
2787         case IRDMA_CM_STATE_ESTABLISHED:
2788                 irdma_cleanup_retrans_entry(cm_node);
2789                 if (datasize) {
2790                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2791                         irdma_handle_rcv_mpa(cm_node, rbuf);
2792                 }
2793                 break;
2794         case IRDMA_CM_STATE_MPAREQ_SENT:
2795                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2796                 if (datasize) {
2797                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2798                         cm_node->ack_rcvd = false;
2799                         irdma_handle_rcv_mpa(cm_node, rbuf);
2800                 } else {
2801                         cm_node->ack_rcvd = true;
2802                 }
2803                 break;
2804         case IRDMA_CM_STATE_LISTENING:
2805                 irdma_cleanup_retrans_entry(cm_node);
2806                 cm_node->state = IRDMA_CM_STATE_CLOSED;
2807                 irdma_send_reset(cm_node);
2808                 break;
2809         case IRDMA_CM_STATE_CLOSED:
2810                 irdma_cleanup_retrans_entry(cm_node);
2811                 refcount_inc(&cm_node->refcnt);
2812                 irdma_send_reset(cm_node);
2813                 break;
2814         case IRDMA_CM_STATE_LAST_ACK:
2815         case IRDMA_CM_STATE_CLOSING:
2816                 irdma_cleanup_retrans_entry(cm_node);
2817                 cm_node->state = IRDMA_CM_STATE_CLOSED;
2818                 irdma_rem_ref_cm_node(cm_node);
2819                 break;
2820         case IRDMA_CM_STATE_FIN_WAIT1:
2821                 irdma_cleanup_retrans_entry(cm_node);
2822                 cm_node->state = IRDMA_CM_STATE_FIN_WAIT2;
2823                 break;
2824         case IRDMA_CM_STATE_SYN_SENT:
2825         case IRDMA_CM_STATE_FIN_WAIT2:
2826         case IRDMA_CM_STATE_OFFLOADED:
2827         case IRDMA_CM_STATE_MPAREQ_RCVD:
2828         case IRDMA_CM_STATE_UNKNOWN:
2829         default:
2830                 irdma_cleanup_retrans_entry(cm_node);
2831                 break;
2832         }
2833
2834         return 0;
2835 }
2836
2837 /**
2838  * irdma_process_pkt - process cm packet
2839  * @cm_node: connection's node
2840  * @rbuf: receive buffer
2841  */
2842 static void irdma_process_pkt(struct irdma_cm_node *cm_node,
2843                               struct irdma_puda_buf *rbuf)
2844 {
2845         enum irdma_tcpip_pkt_type pkt_type = IRDMA_PKT_TYPE_UNKNOWN;
2846         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2847         u32 fin_set = 0;
2848         int err;
2849
2850         if (tcph->rst) {
2851                 pkt_type = IRDMA_PKT_TYPE_RST;
2852         } else if (tcph->syn) {
2853                 pkt_type = IRDMA_PKT_TYPE_SYN;
2854                 if (tcph->ack)
2855                         pkt_type = IRDMA_PKT_TYPE_SYNACK;
2856         } else if (tcph->ack) {
2857                 pkt_type = IRDMA_PKT_TYPE_ACK;
2858         }
2859         if (tcph->fin)
2860                 fin_set = 1;
2861
2862         switch (pkt_type) {
2863         case IRDMA_PKT_TYPE_SYN:
2864                 irdma_handle_syn_pkt(cm_node, rbuf);
2865                 break;
2866         case IRDMA_PKT_TYPE_SYNACK:
2867                 irdma_handle_synack_pkt(cm_node, rbuf);
2868                 break;
2869         case IRDMA_PKT_TYPE_ACK:
2870                 err = irdma_handle_ack_pkt(cm_node, rbuf);
2871                 if (fin_set && !err)
2872                         irdma_handle_fin_pkt(cm_node);
2873                 break;
2874         case IRDMA_PKT_TYPE_RST:
2875                 irdma_handle_rst_pkt(cm_node, rbuf);
2876                 break;
2877         default:
2878                 if (fin_set &&
2879                     (!irdma_check_seq(cm_node, (struct tcphdr *)rbuf->tcph)))
2880                         irdma_handle_fin_pkt(cm_node);
2881                 break;
2882         }
2883 }
2884
2885 /**
2886  * irdma_make_listen_node - create a listen node with params
2887  * @cm_core: cm's core
2888  * @iwdev: iwarp device structure
2889  * @cm_info: quad info for connection
2890  */
2891 static struct irdma_cm_listener *
2892 irdma_make_listen_node(struct irdma_cm_core *cm_core,
2893                        struct irdma_device *iwdev,
2894                        struct irdma_cm_info *cm_info)
2895 {
2896         struct irdma_cm_listener *listener;
2897         unsigned long flags;
2898
2899         /* cannot have multiple matching listeners */
2900         listener = irdma_find_listener(cm_core, cm_info->loc_addr,
2901                                        cm_info->loc_port, cm_info->vlan_id,
2902                                        IRDMA_CM_LISTENER_EITHER_STATE);
2903         if (listener &&
2904             listener->listener_state == IRDMA_CM_LISTENER_ACTIVE_STATE) {
2905                 refcount_dec(&listener->refcnt);
2906                 return NULL;
2907         }
2908
2909         if (!listener) {
2910                 /* create a CM listen node
2911                  * 1/2 node to compare incoming traffic to
2912                  */
2913                 listener = kzalloc(sizeof(*listener), GFP_KERNEL);
2914                 if (!listener)
2915                         return NULL;
2916                 cm_core->stats_listen_nodes_created++;
2917                 memcpy(listener->loc_addr, cm_info->loc_addr,
2918                        sizeof(listener->loc_addr));
2919                 listener->loc_port = cm_info->loc_port;
2920
2921                 INIT_LIST_HEAD(&listener->child_listen_list);
2922
2923                 refcount_set(&listener->refcnt, 1);
2924         } else {
2925                 listener->reused_node = 1;
2926         }
2927
2928         listener->cm_id = cm_info->cm_id;
2929         listener->ipv4 = cm_info->ipv4;
2930         listener->vlan_id = cm_info->vlan_id;
2931         atomic_set(&listener->pend_accepts_cnt, 0);
2932         listener->cm_core = cm_core;
2933         listener->iwdev = iwdev;
2934
2935         listener->backlog = cm_info->backlog;
2936         listener->listener_state = IRDMA_CM_LISTENER_ACTIVE_STATE;
2937
2938         if (!listener->reused_node) {
2939                 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2940                 list_add(&listener->list, &cm_core->listen_list);
2941                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2942         }
2943
2944         return listener;
2945 }
2946
2947 /**
2948  * irdma_create_cm_node - make a connection node with params
2949  * @cm_core: cm's core
2950  * @iwdev: iwarp device structure
2951  * @conn_param: connection parameters
2952  * @cm_info: quad info for connection
2953  * @caller_cm_node: pointer to cm_node structure to return
2954  */
2955 static int irdma_create_cm_node(struct irdma_cm_core *cm_core,
2956                                 struct irdma_device *iwdev,
2957                                 struct iw_cm_conn_param *conn_param,
2958                                 struct irdma_cm_info *cm_info,
2959                                 struct irdma_cm_node **caller_cm_node)
2960 {
2961         struct irdma_cm_node *cm_node;
2962         u16 private_data_len = conn_param->private_data_len;
2963         const void *private_data = conn_param->private_data;
2964
2965         /* create a CM connection node */
2966         cm_node = irdma_make_cm_node(cm_core, iwdev, cm_info, NULL);
2967         if (!cm_node)
2968                 return -ENOMEM;
2969
2970         /* set our node side to client (active) side */
2971         cm_node->tcp_cntxt.client = 1;
2972         cm_node->tcp_cntxt.rcv_wscale = IRDMA_CM_DEFAULT_RCV_WND_SCALE;
2973
2974         irdma_record_ird_ord(cm_node, conn_param->ird, conn_param->ord);
2975
2976         cm_node->pdata.size = private_data_len;
2977         cm_node->pdata.addr = cm_node->pdata_buf;
2978
2979         memcpy(cm_node->pdata_buf, private_data, private_data_len);
2980         *caller_cm_node = cm_node;
2981
2982         return 0;
2983 }
2984
2985 /**
2986  * irdma_cm_reject - reject and teardown a connection
2987  * @cm_node: connection's node
2988  * @pdata: ptr to private data for reject
2989  * @plen: size of private data
2990  */
2991 static int irdma_cm_reject(struct irdma_cm_node *cm_node, const void *pdata,
2992                            u8 plen)
2993 {
2994         int ret;
2995         int passive_state;
2996
2997         if (cm_node->tcp_cntxt.client)
2998                 return 0;
2999
3000         irdma_cleanup_retrans_entry(cm_node);
3001
3002         passive_state = atomic_add_return(1, &cm_node->passive_state);
3003         if (passive_state == IRDMA_SEND_RESET_EVENT) {
3004                 cm_node->state = IRDMA_CM_STATE_CLOSED;
3005                 irdma_rem_ref_cm_node(cm_node);
3006                 return 0;
3007         }
3008
3009         if (cm_node->state == IRDMA_CM_STATE_LISTENER_DESTROYED) {
3010                 irdma_rem_ref_cm_node(cm_node);
3011                 return 0;
3012         }
3013
3014         ret = irdma_send_mpa_reject(cm_node, pdata, plen);
3015         if (!ret)
3016                 return 0;
3017
3018         cm_node->state = IRDMA_CM_STATE_CLOSED;
3019         if (irdma_send_reset(cm_node))
3020                 ibdev_dbg(&cm_node->iwdev->ibdev,
3021                           "CM: send reset failed\n");
3022
3023         return ret;
3024 }
3025
3026 /**
3027  * irdma_cm_close - close of cm connection
3028  * @cm_node: connection's node
3029  */
3030 static int irdma_cm_close(struct irdma_cm_node *cm_node)
3031 {
3032         switch (cm_node->state) {
3033         case IRDMA_CM_STATE_SYN_RCVD:
3034         case IRDMA_CM_STATE_SYN_SENT:
3035         case IRDMA_CM_STATE_ONE_SIDE_ESTABLISHED:
3036         case IRDMA_CM_STATE_ESTABLISHED:
3037         case IRDMA_CM_STATE_ACCEPTING:
3038         case IRDMA_CM_STATE_MPAREQ_SENT:
3039         case IRDMA_CM_STATE_MPAREQ_RCVD:
3040                 irdma_cleanup_retrans_entry(cm_node);
3041                 irdma_send_reset(cm_node);
3042                 break;
3043         case IRDMA_CM_STATE_CLOSE_WAIT:
3044                 cm_node->state = IRDMA_CM_STATE_LAST_ACK;
3045                 irdma_send_fin(cm_node);
3046                 break;
3047         case IRDMA_CM_STATE_FIN_WAIT1:
3048         case IRDMA_CM_STATE_FIN_WAIT2:
3049         case IRDMA_CM_STATE_LAST_ACK:
3050         case IRDMA_CM_STATE_TIME_WAIT:
3051         case IRDMA_CM_STATE_CLOSING:
3052                 return -EINVAL;
3053         case IRDMA_CM_STATE_LISTENING:
3054                 irdma_cleanup_retrans_entry(cm_node);
3055                 irdma_send_reset(cm_node);
3056                 break;
3057         case IRDMA_CM_STATE_MPAREJ_RCVD:
3058         case IRDMA_CM_STATE_UNKNOWN:
3059         case IRDMA_CM_STATE_INITED:
3060         case IRDMA_CM_STATE_CLOSED:
3061         case IRDMA_CM_STATE_LISTENER_DESTROYED:
3062                 irdma_rem_ref_cm_node(cm_node);
3063                 break;
3064         case IRDMA_CM_STATE_OFFLOADED:
3065                 if (cm_node->send_entry)
3066                         ibdev_dbg(&cm_node->iwdev->ibdev,
3067                                   "CM: CM send_entry in OFFLOADED state\n");
3068                 irdma_rem_ref_cm_node(cm_node);
3069                 break;
3070         }
3071
3072         return 0;
3073 }
3074
3075 /**
3076  * irdma_receive_ilq - recv an ETHERNET packet, and process it
3077  * through CM
3078  * @vsi: VSI structure of dev
3079  * @rbuf: receive buffer
3080  */
3081 void irdma_receive_ilq(struct irdma_sc_vsi *vsi, struct irdma_puda_buf *rbuf)
3082 {
3083         struct irdma_cm_node *cm_node;
3084         struct irdma_cm_listener *listener;
3085         struct iphdr *iph;
3086         struct ipv6hdr *ip6h;
3087         struct tcphdr *tcph;
3088         struct irdma_cm_info cm_info = {};
3089         struct irdma_device *iwdev = vsi->back_vsi;
3090         struct irdma_cm_core *cm_core = &iwdev->cm_core;
3091         struct vlan_ethhdr *ethh;
3092         u16 vtag;
3093
3094         /* if vlan, then maclen = 18 else 14 */
3095         iph = (struct iphdr *)rbuf->iph;
3096         print_hex_dump_debug("ILQ: RECEIVE ILQ BUFFER", DUMP_PREFIX_OFFSET,
3097                              16, 8, rbuf->mem.va, rbuf->totallen, false);
3098         if (iwdev->rf->sc_dev.hw_attrs.uk_attrs.hw_rev >= IRDMA_GEN_2) {
3099                 if (rbuf->vlan_valid) {
3100                         vtag = rbuf->vlan_id;
3101                         cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >>
3102                                            VLAN_PRIO_SHIFT;
3103                         cm_info.vlan_id = vtag & VLAN_VID_MASK;
3104                 } else {
3105                         cm_info.vlan_id = 0xFFFF;
3106                 }
3107         } else {
3108                 ethh = rbuf->mem.va;
3109
3110                 if (ethh->h_vlan_proto == htons(ETH_P_8021Q)) {
3111                         vtag = ntohs(ethh->h_vlan_TCI);
3112                         cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >>
3113                                            VLAN_PRIO_SHIFT;
3114                         cm_info.vlan_id = vtag & VLAN_VID_MASK;
3115                         ibdev_dbg(&cm_core->iwdev->ibdev,
3116                                   "CM: vlan_id=%d\n", cm_info.vlan_id);
3117                 } else {
3118                         cm_info.vlan_id = 0xFFFF;
3119                 }
3120         }
3121         tcph = (struct tcphdr *)rbuf->tcph;
3122
3123         if (rbuf->ipv4) {
3124                 cm_info.loc_addr[0] = ntohl(iph->daddr);
3125                 cm_info.rem_addr[0] = ntohl(iph->saddr);
3126                 cm_info.ipv4 = true;
3127                 cm_info.tos = iph->tos;
3128         } else {
3129                 ip6h = (struct ipv6hdr *)rbuf->iph;
3130                 irdma_copy_ip_ntohl(cm_info.loc_addr,
3131                                     ip6h->daddr.in6_u.u6_addr32);
3132                 irdma_copy_ip_ntohl(cm_info.rem_addr,
3133                                     ip6h->saddr.in6_u.u6_addr32);
3134                 cm_info.ipv4 = false;
3135                 cm_info.tos = (ip6h->priority << 4) | (ip6h->flow_lbl[0] >> 4);
3136         }
3137         cm_info.loc_port = ntohs(tcph->dest);
3138         cm_info.rem_port = ntohs(tcph->source);
3139         cm_node = irdma_find_node(cm_core, cm_info.rem_port, cm_info.rem_addr,
3140                                   cm_info.loc_port, cm_info.loc_addr, cm_info.vlan_id);
3141
3142         if (!cm_node) {
3143                 /* Only type of packet accepted are for the
3144                  * PASSIVE open (syn only)
3145                  */
3146                 if (!tcph->syn || tcph->ack)
3147                         return;
3148
3149                 listener = irdma_find_listener(cm_core,
3150                                                cm_info.loc_addr,
3151                                                cm_info.loc_port,
3152                                                cm_info.vlan_id,
3153                                                IRDMA_CM_LISTENER_ACTIVE_STATE);
3154                 if (!listener) {
3155                         cm_info.cm_id = NULL;
3156                         ibdev_dbg(&cm_core->iwdev->ibdev,
3157                                   "CM: no listener found\n");
3158                         return;
3159                 }
3160
3161                 cm_info.cm_id = listener->cm_id;
3162                 cm_node = irdma_make_cm_node(cm_core, iwdev, &cm_info,
3163                                              listener);
3164                 if (!cm_node) {
3165                         ibdev_dbg(&cm_core->iwdev->ibdev,
3166                                   "CM: allocate node failed\n");
3167                         refcount_dec(&listener->refcnt);
3168                         return;
3169                 }
3170
3171                 if (!tcph->rst && !tcph->fin) {
3172                         cm_node->state = IRDMA_CM_STATE_LISTENING;
3173                 } else {
3174                         irdma_rem_ref_cm_node(cm_node);
3175                         return;
3176                 }
3177
3178                 refcount_inc(&cm_node->refcnt);
3179         } else if (cm_node->state == IRDMA_CM_STATE_OFFLOADED) {
3180                 irdma_rem_ref_cm_node(cm_node);
3181                 return;
3182         }
3183
3184         irdma_process_pkt(cm_node, rbuf);
3185         irdma_rem_ref_cm_node(cm_node);
3186 }
3187
3188 static int irdma_add_qh(struct irdma_cm_node *cm_node, bool active)
3189 {
3190         if (!active)
3191                 irdma_add_conn_est_qh(cm_node);
3192         return 0;
3193 }
3194
3195 static void irdma_cm_free_ah_nop(struct irdma_cm_node *cm_node)
3196 {
3197 }
3198
3199 /**
3200  * irdma_setup_cm_core - setup top level instance of a cm core
3201  * @iwdev: iwarp device structure
3202  * @rdma_ver: HW version
3203  */
3204 enum irdma_status_code irdma_setup_cm_core(struct irdma_device *iwdev,
3205                                            u8 rdma_ver)
3206 {
3207         struct irdma_cm_core *cm_core = &iwdev->cm_core;
3208
3209         cm_core->iwdev = iwdev;
3210         cm_core->dev = &iwdev->rf->sc_dev;
3211
3212         /* Handles CM event work items send to Iwarp core */
3213         cm_core->event_wq = alloc_ordered_workqueue("iwarp-event-wq", 0);
3214         if (!cm_core->event_wq)
3215                 return IRDMA_ERR_NO_MEMORY;
3216
3217         INIT_LIST_HEAD(&cm_core->listen_list);
3218
3219         timer_setup(&cm_core->tcp_timer, irdma_cm_timer_tick, 0);
3220
3221         spin_lock_init(&cm_core->ht_lock);
3222         spin_lock_init(&cm_core->listen_list_lock);
3223         spin_lock_init(&cm_core->apbvt_lock);
3224         switch (rdma_ver) {
3225         case IRDMA_GEN_1:
3226                 cm_core->form_cm_frame = irdma_form_uda_cm_frame;
3227                 cm_core->cm_create_ah = irdma_add_qh;
3228                 cm_core->cm_free_ah = irdma_cm_free_ah_nop;
3229                 break;
3230         case IRDMA_GEN_2:
3231         default:
3232                 cm_core->form_cm_frame = irdma_form_ah_cm_frame;
3233                 cm_core->cm_create_ah = irdma_cm_create_ah;
3234                 cm_core->cm_free_ah = irdma_cm_free_ah;
3235         }
3236
3237         return 0;
3238 }
3239
3240 /**
3241  * irdma_cleanup_cm_core - deallocate a top level instance of a
3242  * cm core
3243  * @cm_core: cm's core
3244  */
3245 void irdma_cleanup_cm_core(struct irdma_cm_core *cm_core)
3246 {
3247         unsigned long flags;
3248
3249         if (!cm_core)
3250                 return;
3251
3252         spin_lock_irqsave(&cm_core->ht_lock, flags);
3253         if (timer_pending(&cm_core->tcp_timer))
3254                 del_timer_sync(&cm_core->tcp_timer);
3255         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
3256
3257         destroy_workqueue(cm_core->event_wq);
3258         cm_core->dev->ws_reset(&cm_core->iwdev->vsi);
3259 }
3260
3261 /**
3262  * irdma_init_tcp_ctx - setup qp context
3263  * @cm_node: connection's node
3264  * @tcp_info: offload info for tcp
3265  * @iwqp: associate qp for the connection
3266  */
3267 static void irdma_init_tcp_ctx(struct irdma_cm_node *cm_node,
3268                                struct irdma_tcp_offload_info *tcp_info,
3269                                struct irdma_qp *iwqp)
3270 {
3271         tcp_info->ipv4 = cm_node->ipv4;
3272         tcp_info->drop_ooo_seg = !iwqp->iwdev->iw_ooo;
3273         tcp_info->wscale = true;
3274         tcp_info->ignore_tcp_opt = true;
3275         tcp_info->ignore_tcp_uns_opt = true;
3276         tcp_info->no_nagle = false;
3277
3278         tcp_info->ttl = IRDMA_DEFAULT_TTL;
3279         tcp_info->rtt_var = IRDMA_DEFAULT_RTT_VAR;
3280         tcp_info->ss_thresh = IRDMA_DEFAULT_SS_THRESH;
3281         tcp_info->rexmit_thresh = IRDMA_DEFAULT_REXMIT_THRESH;
3282
3283         tcp_info->tcp_state = IRDMA_TCP_STATE_ESTABLISHED;
3284         tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale;
3285         tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale;
3286
3287         tcp_info->snd_nxt = cm_node->tcp_cntxt.loc_seq_num;
3288         tcp_info->snd_wnd = cm_node->tcp_cntxt.snd_wnd;
3289         tcp_info->rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
3290         tcp_info->snd_max = cm_node->tcp_cntxt.loc_seq_num;
3291
3292         tcp_info->snd_una = cm_node->tcp_cntxt.loc_seq_num;
3293         tcp_info->cwnd = 2 * cm_node->tcp_cntxt.mss;
3294         tcp_info->snd_wl1 = cm_node->tcp_cntxt.rcv_nxt;
3295         tcp_info->snd_wl2 = cm_node->tcp_cntxt.loc_seq_num;
3296         tcp_info->max_snd_window = cm_node->tcp_cntxt.max_snd_wnd;
3297         tcp_info->rcv_wnd = cm_node->tcp_cntxt.rcv_wnd
3298                             << cm_node->tcp_cntxt.rcv_wscale;
3299
3300         tcp_info->flow_label = 0;
3301         tcp_info->snd_mss = (u32)cm_node->tcp_cntxt.mss;
3302         tcp_info->tos = cm_node->tos;
3303         if (cm_node->vlan_id < VLAN_N_VID) {
3304                 tcp_info->insert_vlan_tag = true;
3305                 tcp_info->vlan_tag = cm_node->vlan_id;
3306                 tcp_info->vlan_tag |= cm_node->user_pri << VLAN_PRIO_SHIFT;
3307         }
3308         if (cm_node->ipv4) {
3309                 tcp_info->src_port = cm_node->loc_port;
3310                 tcp_info->dst_port = cm_node->rem_port;
3311
3312                 tcp_info->dest_ip_addr[3] = cm_node->rem_addr[0];
3313                 tcp_info->local_ipaddr[3] = cm_node->loc_addr[0];
3314                 tcp_info->arp_idx = (u16)irdma_arp_table(iwqp->iwdev->rf,
3315                                                          &tcp_info->dest_ip_addr[3],
3316                                                          true, NULL,
3317                                                          IRDMA_ARP_RESOLVE);
3318         } else {
3319                 tcp_info->src_port = cm_node->loc_port;
3320                 tcp_info->dst_port = cm_node->rem_port;
3321                 memcpy(tcp_info->dest_ip_addr, cm_node->rem_addr,
3322                        sizeof(tcp_info->dest_ip_addr));
3323                 memcpy(tcp_info->local_ipaddr, cm_node->loc_addr,
3324                        sizeof(tcp_info->local_ipaddr));
3325
3326                 tcp_info->arp_idx = (u16)irdma_arp_table(iwqp->iwdev->rf,
3327                                                          &tcp_info->dest_ip_addr[0],
3328                                                          false, NULL,
3329                                                          IRDMA_ARP_RESOLVE);
3330         }
3331 }
3332
3333 /**
3334  * irdma_cm_init_tsa_conn - setup qp for RTS
3335  * @iwqp: associate qp for the connection
3336  * @cm_node: connection's node
3337  */
3338 static void irdma_cm_init_tsa_conn(struct irdma_qp *iwqp,
3339                                    struct irdma_cm_node *cm_node)
3340 {
3341         struct irdma_iwarp_offload_info *iwarp_info;
3342         struct irdma_qp_host_ctx_info *ctx_info;
3343
3344         iwarp_info = &iwqp->iwarp_info;
3345         ctx_info = &iwqp->ctx_info;
3346
3347         ctx_info->tcp_info = &iwqp->tcp_info;
3348         ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id;
3349         ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id;
3350
3351         iwarp_info->ord_size = cm_node->ord_size;
3352         iwarp_info->ird_size = cm_node->ird_size;
3353         iwarp_info->rd_en = true;
3354         iwarp_info->rdmap_ver = 1;
3355         iwarp_info->ddp_ver = 1;
3356         iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id;
3357
3358         ctx_info->tcp_info_valid = true;
3359         ctx_info->iwarp_info_valid = true;
3360         ctx_info->user_pri = cm_node->user_pri;
3361
3362         irdma_init_tcp_ctx(cm_node, &iwqp->tcp_info, iwqp);
3363         if (cm_node->snd_mark_en) {
3364                 iwarp_info->snd_mark_en = true;
3365                 iwarp_info->snd_mark_offset = (iwqp->tcp_info.snd_nxt & SNDMARKER_SEQNMASK) +
3366                                                cm_node->lsmm_size;
3367         }
3368
3369         cm_node->state = IRDMA_CM_STATE_OFFLOADED;
3370         iwqp->tcp_info.tcp_state = IRDMA_TCP_STATE_ESTABLISHED;
3371         iwqp->tcp_info.src_mac_addr_idx = iwqp->iwdev->mac_ip_table_idx;
3372
3373         if (cm_node->rcv_mark_en) {
3374                 iwarp_info->rcv_mark_en = true;
3375                 iwarp_info->align_hdrs = true;
3376         }
3377
3378         irdma_sc_qp_setctx(&iwqp->sc_qp, iwqp->host_ctx.va, ctx_info);
3379
3380         /* once tcp_info is set, no need to do it again */
3381         ctx_info->tcp_info_valid = false;
3382         ctx_info->iwarp_info_valid = false;
3383 }
3384
3385 /**
3386  * irdma_cm_disconn - when a connection is being closed
3387  * @iwqp: associated qp for the connection
3388  */
3389 void irdma_cm_disconn(struct irdma_qp *iwqp)
3390 {
3391         struct irdma_device *iwdev = iwqp->iwdev;
3392         struct disconn_work *work;
3393         unsigned long flags;
3394
3395         work = kzalloc(sizeof(*work), GFP_ATOMIC);
3396         if (!work)
3397                 return;
3398
3399         spin_lock_irqsave(&iwdev->rf->qptable_lock, flags);
3400         if (!iwdev->rf->qp_table[iwqp->ibqp.qp_num]) {
3401                 spin_unlock_irqrestore(&iwdev->rf->qptable_lock, flags);
3402                 ibdev_dbg(&iwdev->ibdev,
3403                           "CM: qp_id %d is already freed\n",
3404                           iwqp->ibqp.qp_num);
3405                 kfree(work);
3406                 return;
3407         }
3408         irdma_qp_add_ref(&iwqp->ibqp);
3409         spin_unlock_irqrestore(&iwdev->rf->qptable_lock, flags);
3410
3411         work->iwqp = iwqp;
3412         INIT_WORK(&work->work, irdma_disconnect_worker);
3413         queue_work(iwdev->cleanup_wq, &work->work);
3414 }
3415
3416 /**
3417  * irdma_qp_disconnect - free qp and close cm
3418  * @iwqp: associate qp for the connection
3419  */
3420 static void irdma_qp_disconnect(struct irdma_qp *iwqp)
3421 {
3422         struct irdma_device *iwdev = iwqp->iwdev;
3423
3424         iwqp->active_conn = 0;
3425         /* close the CM node down if it is still active */
3426         ibdev_dbg(&iwdev->ibdev, "CM: Call close API\n");
3427         irdma_cm_close(iwqp->cm_node);
3428 }
3429
3430 /**
3431  * irdma_cm_disconn_true - called by worker thread to disconnect qp
3432  * @iwqp: associate qp for the connection
3433  */
3434 static void irdma_cm_disconn_true(struct irdma_qp *iwqp)
3435 {
3436         struct iw_cm_id *cm_id;
3437         struct irdma_device *iwdev;
3438         struct irdma_sc_qp *qp = &iwqp->sc_qp;
3439         u16 last_ae;
3440         u8 original_hw_tcp_state;
3441         u8 original_ibqp_state;
3442         int disconn_status = 0;
3443         int issue_disconn = 0;
3444         int issue_close = 0;
3445         int issue_flush = 0;
3446         unsigned long flags;
3447         int err;
3448
3449         iwdev = iwqp->iwdev;
3450         spin_lock_irqsave(&iwqp->lock, flags);
3451         if (rdma_protocol_roce(&iwdev->ibdev, 1)) {
3452                 struct ib_qp_attr attr;
3453
3454                 if (iwqp->flush_issued || iwqp->sc_qp.qp_uk.destroy_pending) {
3455                         spin_unlock_irqrestore(&iwqp->lock, flags);
3456                         return;
3457                 }
3458
3459                 spin_unlock_irqrestore(&iwqp->lock, flags);
3460
3461                 attr.qp_state = IB_QPS_ERR;
3462                 irdma_modify_qp_roce(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
3463                 irdma_ib_qp_event(iwqp, qp->event_type);
3464                 return;
3465         }
3466
3467         cm_id = iwqp->cm_id;
3468         /* make sure we havent already closed this connection */
3469         if (!cm_id) {
3470                 spin_unlock_irqrestore(&iwqp->lock, flags);
3471                 return;
3472         }
3473
3474         original_hw_tcp_state = iwqp->hw_tcp_state;
3475         original_ibqp_state = iwqp->ibqp_state;
3476         last_ae = iwqp->last_aeq;
3477
3478         if (qp->term_flags) {
3479                 issue_disconn = 1;
3480                 issue_close = 1;
3481                 iwqp->cm_id = NULL;
3482                 irdma_terminate_del_timer(qp);
3483                 if (!iwqp->flush_issued) {
3484                         iwqp->flush_issued = 1;
3485                         issue_flush = 1;
3486                 }
3487         } else if ((original_hw_tcp_state == IRDMA_TCP_STATE_CLOSE_WAIT) ||
3488                    ((original_ibqp_state == IB_QPS_RTS) &&
3489                     (last_ae == IRDMA_AE_LLP_CONNECTION_RESET))) {
3490                 issue_disconn = 1;
3491                 if (last_ae == IRDMA_AE_LLP_CONNECTION_RESET)
3492                         disconn_status = -ECONNRESET;
3493         }
3494
3495         if ((original_hw_tcp_state == IRDMA_TCP_STATE_CLOSED ||
3496              original_hw_tcp_state == IRDMA_TCP_STATE_TIME_WAIT ||
3497              last_ae == IRDMA_AE_RDMAP_ROE_BAD_LLP_CLOSE ||
3498              last_ae == IRDMA_AE_BAD_CLOSE ||
3499              last_ae == IRDMA_AE_LLP_CONNECTION_RESET || iwdev->reset)) {
3500                 issue_close = 1;
3501                 iwqp->cm_id = NULL;
3502                 qp->term_flags = 0;
3503                 if (!iwqp->flush_issued) {
3504                         iwqp->flush_issued = 1;
3505                         issue_flush = 1;
3506                 }
3507         }
3508
3509         spin_unlock_irqrestore(&iwqp->lock, flags);
3510         if (issue_flush && !iwqp->sc_qp.qp_uk.destroy_pending) {
3511                 irdma_flush_wqes(iwqp, IRDMA_FLUSH_SQ | IRDMA_FLUSH_RQ |
3512                                  IRDMA_FLUSH_WAIT);
3513
3514                 if (qp->term_flags)
3515                         irdma_ib_qp_event(iwqp, qp->event_type);
3516         }
3517
3518         if (!cm_id || !cm_id->event_handler)
3519                 return;
3520
3521         spin_lock_irqsave(&iwdev->cm_core.ht_lock, flags);
3522         if (!iwqp->cm_node) {
3523                 spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags);
3524                 return;
3525         }
3526         refcount_inc(&iwqp->cm_node->refcnt);
3527
3528         spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags);
3529
3530         if (issue_disconn) {
3531                 err = irdma_send_cm_event(iwqp->cm_node, cm_id,
3532                                           IW_CM_EVENT_DISCONNECT,
3533                                           disconn_status);
3534                 if (err)
3535                         ibdev_dbg(&iwdev->ibdev,
3536                                   "CM: disconnect event failed: - cm_id = %p\n",
3537                                   cm_id);
3538         }
3539         if (issue_close) {
3540                 cm_id->provider_data = iwqp;
3541                 err = irdma_send_cm_event(iwqp->cm_node, cm_id,
3542                                           IW_CM_EVENT_CLOSE, 0);
3543                 if (err)
3544                         ibdev_dbg(&iwdev->ibdev,
3545                                   "CM: close event failed: - cm_id = %p\n",
3546                                   cm_id);
3547                 irdma_qp_disconnect(iwqp);
3548         }
3549         irdma_rem_ref_cm_node(iwqp->cm_node);
3550 }
3551
3552 /**
3553  * irdma_disconnect_worker - worker for connection close
3554  * @work: points or disconn structure
3555  */
3556 static void irdma_disconnect_worker(struct work_struct *work)
3557 {
3558         struct disconn_work *dwork = container_of(work, struct disconn_work, work);
3559         struct irdma_qp *iwqp = dwork->iwqp;
3560
3561         kfree(dwork);
3562         irdma_cm_disconn_true(iwqp);
3563         irdma_qp_rem_ref(&iwqp->ibqp);
3564 }
3565
3566 /**
3567  * irdma_free_lsmm_rsrc - free lsmm memory and deregister
3568  * @iwqp: associate qp for the connection
3569  */
3570 void irdma_free_lsmm_rsrc(struct irdma_qp *iwqp)
3571 {
3572         struct irdma_device *iwdev;
3573
3574         iwdev = iwqp->iwdev;
3575
3576         if (iwqp->ietf_mem.va) {
3577                 if (iwqp->lsmm_mr)
3578                         iwdev->ibdev.ops.dereg_mr(iwqp->lsmm_mr, NULL);
3579                 dma_free_coherent(iwdev->rf->sc_dev.hw->device,
3580                                   iwqp->ietf_mem.size, iwqp->ietf_mem.va,
3581                                   iwqp->ietf_mem.pa);
3582                 iwqp->ietf_mem.va = NULL;
3583                 iwqp->ietf_mem.va = NULL;
3584         }
3585 }
3586
3587 /**
3588  * irdma_accept - registered call for connection to be accepted
3589  * @cm_id: cm information for passive connection
3590  * @conn_param: accpet parameters
3591  */
3592 int irdma_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3593 {
3594         struct ib_qp *ibqp;
3595         struct irdma_qp *iwqp;
3596         struct irdma_device *iwdev;
3597         struct irdma_sc_dev *dev;
3598         struct irdma_cm_node *cm_node;
3599         struct ib_qp_attr attr = {};
3600         int passive_state;
3601         struct ib_mr *ibmr;
3602         struct irdma_pd *iwpd;
3603         u16 buf_len = 0;
3604         struct irdma_kmem_info accept;
3605         u64 tagged_offset;
3606         int wait_ret;
3607         int ret = 0;
3608
3609         ibqp = irdma_get_qp(cm_id->device, conn_param->qpn);
3610         if (!ibqp)
3611                 return -EINVAL;
3612
3613         iwqp = to_iwqp(ibqp);
3614         iwdev = iwqp->iwdev;
3615         dev = &iwdev->rf->sc_dev;
3616         cm_node = cm_id->provider_data;
3617
3618         if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) {
3619                 cm_node->ipv4 = true;
3620                 cm_node->vlan_id = irdma_get_vlan_ipv4(cm_node->loc_addr);
3621         } else {
3622                 cm_node->ipv4 = false;
3623                 irdma_netdev_vlan_ipv6(cm_node->loc_addr, &cm_node->vlan_id,
3624                                        NULL);
3625         }
3626         ibdev_dbg(&iwdev->ibdev, "CM: Accept vlan_id=%d\n",
3627                   cm_node->vlan_id);
3628
3629         trace_irdma_accept(cm_node, 0, NULL);
3630
3631         if (cm_node->state == IRDMA_CM_STATE_LISTENER_DESTROYED) {
3632                 ret = -EINVAL;
3633                 goto error;
3634         }
3635
3636         passive_state = atomic_add_return(1, &cm_node->passive_state);
3637         if (passive_state == IRDMA_SEND_RESET_EVENT) {
3638                 ret = -ECONNRESET;
3639                 goto error;
3640         }
3641
3642         buf_len = conn_param->private_data_len + IRDMA_MAX_IETF_SIZE;
3643         iwqp->ietf_mem.size = ALIGN(buf_len, 1);
3644         iwqp->ietf_mem.va = dma_alloc_coherent(dev->hw->device,
3645                                                iwqp->ietf_mem.size,
3646                                                &iwqp->ietf_mem.pa, GFP_KERNEL);
3647         if (!iwqp->ietf_mem.va) {
3648                 ret = -ENOMEM;
3649                 goto error;
3650         }
3651
3652         cm_node->pdata.size = conn_param->private_data_len;
3653         accept.addr = iwqp->ietf_mem.va;
3654         accept.size = irdma_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY);
3655         memcpy((u8 *)accept.addr + accept.size, conn_param->private_data,
3656                conn_param->private_data_len);
3657
3658         if (cm_node->dev->ws_add(iwqp->sc_qp.vsi, cm_node->user_pri)) {
3659                 ret = -ENOMEM;
3660                 goto error;
3661         }
3662         iwqp->sc_qp.user_pri = cm_node->user_pri;
3663         irdma_qp_add_qos(&iwqp->sc_qp);
3664         /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3665         iwpd = iwqp->iwpd;
3666         tagged_offset = (uintptr_t)iwqp->ietf_mem.va;
3667         ibmr = irdma_reg_phys_mr(&iwpd->ibpd, iwqp->ietf_mem.pa, buf_len,
3668                                  IB_ACCESS_LOCAL_WRITE, &tagged_offset);
3669         if (IS_ERR(ibmr)) {
3670                 ret = -ENOMEM;
3671                 goto error;
3672         }
3673
3674         ibmr->pd = &iwpd->ibpd;
3675         ibmr->device = iwpd->ibpd.device;
3676         iwqp->lsmm_mr = ibmr;
3677         if (iwqp->page)
3678                 iwqp->sc_qp.qp_uk.sq_base = kmap_local_page(iwqp->page);
3679
3680         cm_node->lsmm_size = accept.size + conn_param->private_data_len;
3681         irdma_sc_send_lsmm(&iwqp->sc_qp, iwqp->ietf_mem.va, cm_node->lsmm_size,
3682                            ibmr->lkey);
3683
3684         if (iwqp->page)
3685                 kunmap_local(iwqp->sc_qp.qp_uk.sq_base);
3686
3687         iwqp->cm_id = cm_id;
3688         cm_node->cm_id = cm_id;
3689
3690         cm_id->provider_data = iwqp;
3691         iwqp->active_conn = 0;
3692         iwqp->cm_node = cm_node;
3693         cm_node->iwqp = iwqp;
3694         irdma_cm_init_tsa_conn(iwqp, cm_node);
3695         irdma_qp_add_ref(&iwqp->ibqp);
3696         cm_id->add_ref(cm_id);
3697
3698         attr.qp_state = IB_QPS_RTS;
3699         cm_node->qhash_set = false;
3700         cm_node->cm_core->cm_free_ah(cm_node);
3701
3702         irdma_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
3703         if (dev->hw_attrs.uk_attrs.feature_flags & IRDMA_FEATURE_RTS_AE) {
3704                 wait_ret = wait_event_interruptible_timeout(iwqp->waitq,
3705                                                             iwqp->rts_ae_rcvd,
3706                                                             IRDMA_MAX_TIMEOUT);
3707                 if (!wait_ret) {
3708                         ibdev_dbg(&iwdev->ibdev,
3709                                   "CM: Slow Connection: cm_node=%p, loc_port=%d, rem_port=%d, cm_id=%p\n",
3710                                   cm_node, cm_node->loc_port,
3711                                   cm_node->rem_port, cm_node->cm_id);
3712                         ret = -ECONNRESET;
3713                         goto error;
3714                 }
3715         }
3716
3717         irdma_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0);
3718         cm_node->accelerated = true;
3719         complete(&cm_node->establish_comp);
3720
3721         if (cm_node->accept_pend) {
3722                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
3723                 cm_node->accept_pend = 0;
3724         }
3725
3726         ibdev_dbg(&iwdev->ibdev,
3727                   "CM: rem_port=0x%04x, loc_port=0x%04x rem_addr=%pI4 loc_addr=%pI4 cm_node=%p cm_id=%p qp_id = %d\n\n",
3728                   cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr,
3729                   cm_node->loc_addr, cm_node, cm_id, ibqp->qp_num);
3730         cm_node->cm_core->stats_accepts++;
3731
3732         return 0;
3733 error:
3734         irdma_free_lsmm_rsrc(iwqp);
3735         irdma_rem_ref_cm_node(cm_node);
3736
3737         return ret;
3738 }
3739
3740 /**
3741  * irdma_reject - registered call for connection to be rejected
3742  * @cm_id: cm information for passive connection
3743  * @pdata: private data to be sent
3744  * @pdata_len: private data length
3745  */
3746 int irdma_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3747 {
3748         struct irdma_device *iwdev;
3749         struct irdma_cm_node *cm_node;
3750
3751         cm_node = cm_id->provider_data;
3752         cm_node->pdata.size = pdata_len;
3753
3754         trace_irdma_reject(cm_node, 0, NULL);
3755
3756         iwdev = to_iwdev(cm_id->device);
3757         if (!iwdev)
3758                 return -EINVAL;
3759
3760         cm_node->cm_core->stats_rejects++;
3761
3762         if (pdata_len + sizeof(struct ietf_mpa_v2) > IRDMA_MAX_CM_BUF)
3763                 return -EINVAL;
3764
3765         return irdma_cm_reject(cm_node, pdata, pdata_len);
3766 }
3767
3768 /**
3769  * irdma_connect - registered call for connection to be established
3770  * @cm_id: cm information for passive connection
3771  * @conn_param: Information about the connection
3772  */
3773 int irdma_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3774 {
3775         struct ib_qp *ibqp;
3776         struct irdma_qp *iwqp;
3777         struct irdma_device *iwdev;
3778         struct irdma_cm_node *cm_node;
3779         struct irdma_cm_info cm_info;
3780         struct sockaddr_in *laddr;
3781         struct sockaddr_in *raddr;
3782         struct sockaddr_in6 *laddr6;
3783         struct sockaddr_in6 *raddr6;
3784         int ret = 0;
3785
3786         ibqp = irdma_get_qp(cm_id->device, conn_param->qpn);
3787         if (!ibqp)
3788                 return -EINVAL;
3789         iwqp = to_iwqp(ibqp);
3790         if (!iwqp)
3791                 return -EINVAL;
3792         iwdev = iwqp->iwdev;
3793         if (!iwdev)
3794                 return -EINVAL;
3795
3796         laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3797         raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
3798         laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3799         raddr6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr;
3800
3801         if (!(laddr->sin_port) || !(raddr->sin_port))
3802                 return -EINVAL;
3803
3804         iwqp->active_conn = 1;
3805         iwqp->cm_id = NULL;
3806         cm_id->provider_data = iwqp;
3807
3808         /* set up the connection params for the node */
3809         if (cm_id->remote_addr.ss_family == AF_INET) {
3810                 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV4)
3811                         return -EINVAL;
3812
3813                 cm_info.ipv4 = true;
3814                 memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr));
3815                 memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr));
3816                 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3817                 cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr);
3818                 cm_info.loc_port = ntohs(laddr->sin_port);
3819                 cm_info.rem_port = ntohs(raddr->sin_port);
3820                 cm_info.vlan_id = irdma_get_vlan_ipv4(cm_info.loc_addr);
3821         } else {
3822                 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV6)
3823                         return -EINVAL;
3824
3825                 cm_info.ipv4 = false;
3826                 irdma_copy_ip_ntohl(cm_info.loc_addr,
3827                                     laddr6->sin6_addr.in6_u.u6_addr32);
3828                 irdma_copy_ip_ntohl(cm_info.rem_addr,
3829                                     raddr6->sin6_addr.in6_u.u6_addr32);
3830                 cm_info.loc_port = ntohs(laddr6->sin6_port);
3831                 cm_info.rem_port = ntohs(raddr6->sin6_port);
3832                 irdma_netdev_vlan_ipv6(cm_info.loc_addr, &cm_info.vlan_id,
3833                                        NULL);
3834         }
3835         cm_info.cm_id = cm_id;
3836         cm_info.qh_qpid = iwdev->vsi.ilq->qp_id;
3837         cm_info.tos = cm_id->tos;
3838         cm_info.user_pri = rt_tos2priority(cm_id->tos);
3839
3840         if (iwqp->sc_qp.dev->ws_add(iwqp->sc_qp.vsi, cm_info.user_pri))
3841                 return -ENOMEM;
3842         iwqp->sc_qp.user_pri = cm_info.user_pri;
3843         irdma_qp_add_qos(&iwqp->sc_qp);
3844         ibdev_dbg(&iwdev->ibdev, "DCB: TOS:[%d] UP:[%d]\n", cm_id->tos,
3845                   cm_info.user_pri);
3846
3847         trace_irdma_dcb_tos(iwdev, cm_id->tos, cm_info.user_pri);
3848
3849         ret = irdma_create_cm_node(&iwdev->cm_core, iwdev, conn_param, &cm_info,
3850                                    &cm_node);
3851         if (ret)
3852                 return ret;
3853         ret = cm_node->cm_core->cm_create_ah(cm_node, true);
3854         if (ret)
3855                 goto err;
3856         if (irdma_manage_qhash(iwdev, &cm_info,
3857                                IRDMA_QHASH_TYPE_TCP_ESTABLISHED,
3858                                IRDMA_QHASH_MANAGE_TYPE_ADD, NULL, true)) {
3859                 ret = -EINVAL;
3860                 goto err;
3861         }
3862         cm_node->qhash_set = true;
3863
3864         cm_node->apbvt_entry = irdma_add_apbvt(iwdev, cm_info.loc_port);
3865         if (!cm_node->apbvt_entry) {
3866                 ret = -EINVAL;
3867                 goto err;
3868         }
3869
3870         cm_node->apbvt_set = true;
3871         iwqp->cm_node = cm_node;
3872         cm_node->iwqp = iwqp;
3873         iwqp->cm_id = cm_id;
3874         irdma_qp_add_ref(&iwqp->ibqp);
3875         cm_id->add_ref(cm_id);
3876
3877         if (cm_node->state != IRDMA_CM_STATE_OFFLOADED) {
3878                 cm_node->state = IRDMA_CM_STATE_SYN_SENT;
3879                 ret = irdma_send_syn(cm_node, 0);
3880                 if (ret)
3881                         goto err;
3882         }
3883
3884         ibdev_dbg(&iwdev->ibdev,
3885                   "CM: rem_port=0x%04x, loc_port=0x%04x rem_addr=%pI4 loc_addr=%pI4 cm_node=%p cm_id=%p qp_id = %d\n\n",
3886                   cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr,
3887                   cm_node->loc_addr, cm_node, cm_id, ibqp->qp_num);
3888
3889         trace_irdma_connect(cm_node, 0, NULL);
3890
3891         return 0;
3892
3893 err:
3894         if (cm_info.ipv4)
3895                 ibdev_dbg(&iwdev->ibdev,
3896                           "CM: connect() FAILED: dest addr=%pI4",
3897                           cm_info.rem_addr);
3898         else
3899                 ibdev_dbg(&iwdev->ibdev,
3900                           "CM: connect() FAILED: dest addr=%pI6",
3901                           cm_info.rem_addr);
3902         irdma_rem_ref_cm_node(cm_node);
3903         iwdev->cm_core.stats_connect_errs++;
3904
3905         return ret;
3906 }
3907
3908 /**
3909  * irdma_create_listen - registered call creating listener
3910  * @cm_id: cm information for passive connection
3911  * @backlog: to max accept pending count
3912  */
3913 int irdma_create_listen(struct iw_cm_id *cm_id, int backlog)
3914 {
3915         struct irdma_device *iwdev;
3916         struct irdma_cm_listener *cm_listen_node;
3917         struct irdma_cm_info cm_info = {};
3918         enum irdma_status_code err;
3919         struct sockaddr_in *laddr;
3920         struct sockaddr_in6 *laddr6;
3921         bool wildcard = false;
3922
3923         iwdev = to_iwdev(cm_id->device);
3924         if (!iwdev)
3925                 return -EINVAL;
3926
3927         laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3928         laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3929         cm_info.qh_qpid = iwdev->vsi.ilq->qp_id;
3930
3931         if (laddr->sin_family == AF_INET) {
3932                 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV4)
3933                         return -EINVAL;
3934
3935                 cm_info.ipv4 = true;
3936                 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3937                 cm_info.loc_port = ntohs(laddr->sin_port);
3938
3939                 if (laddr->sin_addr.s_addr != htonl(INADDR_ANY)) {
3940                         cm_info.vlan_id = irdma_get_vlan_ipv4(cm_info.loc_addr);
3941                 } else {
3942                         cm_info.vlan_id = 0xFFFF;
3943                         wildcard = true;
3944                 }
3945         } else {
3946                 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV6)
3947                         return -EINVAL;
3948
3949                 cm_info.ipv4 = false;
3950                 irdma_copy_ip_ntohl(cm_info.loc_addr,
3951                                     laddr6->sin6_addr.in6_u.u6_addr32);
3952                 cm_info.loc_port = ntohs(laddr6->sin6_port);
3953                 if (ipv6_addr_type(&laddr6->sin6_addr) != IPV6_ADDR_ANY) {
3954                         irdma_netdev_vlan_ipv6(cm_info.loc_addr,
3955                                                &cm_info.vlan_id, NULL);
3956                 } else {
3957                         cm_info.vlan_id = 0xFFFF;
3958                         wildcard = true;
3959                 }
3960         }
3961
3962         if (cm_info.vlan_id >= VLAN_N_VID && iwdev->dcb)
3963                 cm_info.vlan_id = 0;
3964         cm_info.backlog = backlog;
3965         cm_info.cm_id = cm_id;
3966
3967         trace_irdma_create_listen(iwdev, &cm_info);
3968
3969         cm_listen_node = irdma_make_listen_node(&iwdev->cm_core, iwdev,
3970                                                 &cm_info);
3971         if (!cm_listen_node) {
3972                 ibdev_dbg(&iwdev->ibdev,
3973                           "CM: cm_listen_node == NULL\n");
3974                 return -ENOMEM;
3975         }
3976
3977         cm_id->provider_data = cm_listen_node;
3978
3979         cm_listen_node->tos = cm_id->tos;
3980         cm_listen_node->user_pri = rt_tos2priority(cm_id->tos);
3981         cm_info.user_pri = cm_listen_node->user_pri;
3982         if (!cm_listen_node->reused_node) {
3983                 if (wildcard) {
3984                         err = irdma_add_mqh(iwdev, &cm_info, cm_listen_node);
3985                         if (err)
3986                                 goto error;
3987                 } else {
3988                         err = irdma_manage_qhash(iwdev, &cm_info,
3989                                                  IRDMA_QHASH_TYPE_TCP_SYN,
3990                                                  IRDMA_QHASH_MANAGE_TYPE_ADD,
3991                                                  NULL, true);
3992                         if (err)
3993                                 goto error;
3994
3995                         cm_listen_node->qhash_set = true;
3996                 }
3997
3998                 cm_listen_node->apbvt_entry = irdma_add_apbvt(iwdev,
3999                                                               cm_info.loc_port);
4000                 if (!cm_listen_node->apbvt_entry)
4001                         goto error;
4002         }
4003         cm_id->add_ref(cm_id);
4004         cm_listen_node->cm_core->stats_listen_created++;
4005         ibdev_dbg(&iwdev->ibdev,
4006                   "CM: loc_port=0x%04x loc_addr=%pI4 cm_listen_node=%p cm_id=%p qhash_set=%d vlan_id=%d\n",
4007                   cm_listen_node->loc_port, cm_listen_node->loc_addr,
4008                   cm_listen_node, cm_listen_node->cm_id,
4009                   cm_listen_node->qhash_set, cm_listen_node->vlan_id);
4010
4011         return 0;
4012
4013 error:
4014
4015         irdma_cm_del_listen(&iwdev->cm_core, cm_listen_node, false);
4016
4017         return -EINVAL;
4018 }
4019
4020 /**
4021  * irdma_destroy_listen - registered call to destroy listener
4022  * @cm_id: cm information for passive connection
4023  */
4024 int irdma_destroy_listen(struct iw_cm_id *cm_id)
4025 {
4026         struct irdma_device *iwdev;
4027
4028         iwdev = to_iwdev(cm_id->device);
4029         if (cm_id->provider_data)
4030                 irdma_cm_del_listen(&iwdev->cm_core, cm_id->provider_data,
4031                                     true);
4032         else
4033                 ibdev_dbg(&iwdev->ibdev,
4034                           "CM: cm_id->provider_data was NULL\n");
4035
4036         cm_id->rem_ref(cm_id);
4037
4038         return 0;
4039 }
4040
4041 /**
4042  * irdma_teardown_list_prep - add conn nodes slated for tear down to list
4043  * @cm_core: cm's core
4044  * @teardown_list: a list to which cm_node will be selected
4045  * @ipaddr: pointer to ip address
4046  * @nfo: pointer to cm_info structure instance
4047  * @disconnect_all: flag indicating disconnect all QPs
4048  */
4049 static void irdma_teardown_list_prep(struct irdma_cm_core *cm_core,
4050                                      struct list_head *teardown_list,
4051                                      u32 *ipaddr,
4052                                      struct irdma_cm_info *nfo,
4053                                      bool disconnect_all)
4054 {
4055         struct irdma_cm_node *cm_node;
4056         int bkt;
4057
4058         hash_for_each_rcu(cm_core->cm_hash_tbl, bkt, cm_node, list) {
4059                 if ((disconnect_all ||
4060                      (nfo->vlan_id == cm_node->vlan_id &&
4061                       !memcmp(cm_node->loc_addr, ipaddr, nfo->ipv4 ? 4 : 16))) &&
4062                     refcount_inc_not_zero(&cm_node->refcnt))
4063                         list_add(&cm_node->teardown_entry, teardown_list);
4064         }
4065 }
4066
4067 /**
4068  * irdma_cm_event_connected - handle connected active node
4069  * @event: the info for cm_node of connection
4070  */
4071 static void irdma_cm_event_connected(struct irdma_cm_event *event)
4072 {
4073         struct irdma_qp *iwqp;
4074         struct irdma_device *iwdev;
4075         struct irdma_cm_node *cm_node;
4076         struct irdma_sc_dev *dev;
4077         struct ib_qp_attr attr = {};
4078         struct iw_cm_id *cm_id;
4079         int status;
4080         bool read0;
4081         int wait_ret = 0;
4082
4083         cm_node = event->cm_node;
4084         cm_id = cm_node->cm_id;
4085         iwqp = cm_id->provider_data;
4086         iwdev = iwqp->iwdev;
4087         dev = &iwdev->rf->sc_dev;
4088         if (iwqp->sc_qp.qp_uk.destroy_pending) {
4089                 status = -ETIMEDOUT;
4090                 goto error;
4091         }
4092
4093         irdma_cm_init_tsa_conn(iwqp, cm_node);
4094         read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO);
4095         if (iwqp->page)
4096                 iwqp->sc_qp.qp_uk.sq_base = kmap_local_page(iwqp->page);
4097         irdma_sc_send_rtt(&iwqp->sc_qp, read0);
4098         if (iwqp->page)
4099                 kunmap_local(iwqp->sc_qp.qp_uk.sq_base);
4100
4101         attr.qp_state = IB_QPS_RTS;
4102         cm_node->qhash_set = false;
4103         irdma_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
4104         if (dev->hw_attrs.uk_attrs.feature_flags & IRDMA_FEATURE_RTS_AE) {
4105                 wait_ret = wait_event_interruptible_timeout(iwqp->waitq,
4106                                                             iwqp->rts_ae_rcvd,
4107                                                             IRDMA_MAX_TIMEOUT);
4108                 if (!wait_ret)
4109                         ibdev_dbg(&iwdev->ibdev,
4110                                   "CM: Slow Connection: cm_node=%p, loc_port=%d, rem_port=%d, cm_id=%p\n",
4111                                   cm_node, cm_node->loc_port,
4112                                   cm_node->rem_port, cm_node->cm_id);
4113         }
4114
4115         irdma_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 0);
4116         cm_node->accelerated = true;
4117         complete(&cm_node->establish_comp);
4118         cm_node->cm_core->cm_free_ah(cm_node);
4119         return;
4120
4121 error:
4122         iwqp->cm_id = NULL;
4123         cm_id->provider_data = NULL;
4124         irdma_send_cm_event(event->cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY,
4125                             status);
4126         irdma_rem_ref_cm_node(event->cm_node);
4127 }
4128
4129 /**
4130  * irdma_cm_event_reset - handle reset
4131  * @event: the info for cm_node of connection
4132  */
4133 static void irdma_cm_event_reset(struct irdma_cm_event *event)
4134 {
4135         struct irdma_cm_node *cm_node = event->cm_node;
4136         struct iw_cm_id *cm_id = cm_node->cm_id;
4137         struct irdma_qp *iwqp;
4138
4139         if (!cm_id)
4140                 return;
4141
4142         iwqp = cm_id->provider_data;
4143         if (!iwqp)
4144                 return;
4145
4146         ibdev_dbg(&cm_node->iwdev->ibdev,
4147                   "CM: reset event %p - cm_id = %p\n", event->cm_node, cm_id);
4148         iwqp->cm_id = NULL;
4149
4150         irdma_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT,
4151                             -ECONNRESET);
4152         irdma_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0);
4153 }
4154
4155 /**
4156  * irdma_cm_event_handler - send event to cm upper layer
4157  * @work: pointer of cm event info.
4158  */
4159 static void irdma_cm_event_handler(struct work_struct *work)
4160 {
4161         struct irdma_cm_event *event = container_of(work, struct irdma_cm_event, event_work);
4162         struct irdma_cm_node *cm_node;
4163
4164         if (!event || !event->cm_node || !event->cm_node->cm_core)
4165                 return;
4166
4167         cm_node = event->cm_node;
4168         trace_irdma_cm_event_handler(cm_node, event->type, NULL);
4169
4170         switch (event->type) {
4171         case IRDMA_CM_EVENT_MPA_REQ:
4172                 irdma_send_cm_event(cm_node, cm_node->cm_id,
4173                                     IW_CM_EVENT_CONNECT_REQUEST, 0);
4174                 break;
4175         case IRDMA_CM_EVENT_RESET:
4176                 irdma_cm_event_reset(event);
4177                 break;
4178         case IRDMA_CM_EVENT_CONNECTED:
4179                 if (!event->cm_node->cm_id ||
4180                     event->cm_node->state != IRDMA_CM_STATE_OFFLOADED)
4181                         break;
4182                 irdma_cm_event_connected(event);
4183                 break;
4184         case IRDMA_CM_EVENT_MPA_REJECT:
4185                 if (!event->cm_node->cm_id ||
4186                     cm_node->state == IRDMA_CM_STATE_OFFLOADED)
4187                         break;
4188                 irdma_send_cm_event(cm_node, cm_node->cm_id,
4189                                     IW_CM_EVENT_CONNECT_REPLY, -ECONNREFUSED);
4190                 break;
4191         case IRDMA_CM_EVENT_ABORTED:
4192                 if (!event->cm_node->cm_id ||
4193                     event->cm_node->state == IRDMA_CM_STATE_OFFLOADED)
4194                         break;
4195                 irdma_event_connect_error(event);
4196                 break;
4197         default:
4198                 ibdev_dbg(&cm_node->iwdev->ibdev,
4199                           "CM: bad event type = %d\n", event->type);
4200                 break;
4201         }
4202
4203         irdma_rem_ref_cm_node(event->cm_node);
4204         kfree(event);
4205 }
4206
4207 /**
4208  * irdma_cm_post_event - queue event request for worker thread
4209  * @event: cm node's info for up event call
4210  */
4211 static void irdma_cm_post_event(struct irdma_cm_event *event)
4212 {
4213         refcount_inc(&event->cm_node->refcnt);
4214         INIT_WORK(&event->event_work, irdma_cm_event_handler);
4215         queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
4216 }
4217
4218 /**
4219  * irdma_cm_teardown_connections - teardown QPs
4220  * @iwdev: device pointer
4221  * @ipaddr: Pointer to IPv4 or IPv6 address
4222  * @nfo: Connection info
4223  * @disconnect_all: flag indicating disconnect all QPs
4224  *
4225  * teardown QPs where source or destination addr matches ip addr
4226  */
4227 void irdma_cm_teardown_connections(struct irdma_device *iwdev, u32 *ipaddr,
4228                                    struct irdma_cm_info *nfo,
4229                                    bool disconnect_all)
4230 {
4231         struct irdma_cm_core *cm_core = &iwdev->cm_core;
4232         struct list_head *list_core_temp;
4233         struct list_head *list_node;
4234         struct irdma_cm_node *cm_node;
4235         struct list_head teardown_list;
4236         struct ib_qp_attr attr;
4237         struct irdma_sc_vsi *vsi = &iwdev->vsi;
4238         struct irdma_sc_qp *sc_qp;
4239         struct irdma_qp *qp;
4240         int i;
4241
4242         INIT_LIST_HEAD(&teardown_list);
4243
4244         rcu_read_lock();
4245         irdma_teardown_list_prep(cm_core, &teardown_list, ipaddr, nfo, disconnect_all);
4246         rcu_read_unlock();
4247
4248         list_for_each_safe (list_node, list_core_temp, &teardown_list) {
4249                 cm_node = container_of(list_node, struct irdma_cm_node,
4250                                        teardown_entry);
4251                 attr.qp_state = IB_QPS_ERR;
4252                 irdma_modify_qp(&cm_node->iwqp->ibqp, &attr, IB_QP_STATE, NULL);
4253                 if (iwdev->reset)
4254                         irdma_cm_disconn(cm_node->iwqp);
4255                 irdma_rem_ref_cm_node(cm_node);
4256         }
4257         if (!iwdev->roce_mode)
4258                 return;
4259
4260         INIT_LIST_HEAD(&teardown_list);
4261         for (i = 0; i < IRDMA_MAX_USER_PRIORITY; i++) {
4262                 mutex_lock(&vsi->qos[i].qos_mutex);
4263                 list_for_each_safe (list_node, list_core_temp,
4264                                     &vsi->qos[i].qplist) {
4265                         u32 qp_ip[4];
4266
4267                         sc_qp = container_of(list_node, struct irdma_sc_qp,
4268                                              list);
4269                         if (sc_qp->qp_uk.qp_type != IRDMA_QP_TYPE_ROCE_RC)
4270                                 continue;
4271
4272                         qp = sc_qp->qp_uk.back_qp;
4273                         if (!disconnect_all) {
4274                                 if (nfo->ipv4)
4275                                         qp_ip[0] = qp->udp_info.local_ipaddr[3];
4276                                 else
4277                                         memcpy(qp_ip,
4278                                                &qp->udp_info.local_ipaddr[0],
4279                                                sizeof(qp_ip));
4280                         }
4281
4282                         if (disconnect_all ||
4283                             (nfo->vlan_id == (qp->udp_info.vlan_tag & VLAN_VID_MASK) &&
4284                              !memcmp(qp_ip, ipaddr, nfo->ipv4 ? 4 : 16))) {
4285                                 spin_lock(&iwdev->rf->qptable_lock);
4286                                 if (iwdev->rf->qp_table[sc_qp->qp_uk.qp_id]) {
4287                                         irdma_qp_add_ref(&qp->ibqp);
4288                                         list_add(&qp->teardown_entry,
4289                                                  &teardown_list);
4290                                 }
4291                                 spin_unlock(&iwdev->rf->qptable_lock);
4292                         }
4293                 }
4294                 mutex_unlock(&vsi->qos[i].qos_mutex);
4295         }
4296
4297         list_for_each_safe (list_node, list_core_temp, &teardown_list) {
4298                 qp = container_of(list_node, struct irdma_qp, teardown_entry);
4299                 attr.qp_state = IB_QPS_ERR;
4300                 irdma_modify_qp_roce(&qp->ibqp, &attr, IB_QP_STATE, NULL);
4301                 irdma_qp_rem_ref(&qp->ibqp);
4302         }
4303 }
4304
4305 /**
4306  * irdma_qhash_ctrl - enable/disable qhash for list
4307  * @iwdev: device pointer
4308  * @parent_listen_node: parent listen node
4309  * @nfo: cm info node
4310  * @ipaddr: Pointer to IPv4 or IPv6 address
4311  * @ipv4: flag indicating IPv4 when true
4312  * @ifup: flag indicating interface up when true
4313  *
4314  * Enables or disables the qhash for the node in the child
4315  * listen list that matches ipaddr. If no matching IP was found
4316  * it will allocate and add a new child listen node to the
4317  * parent listen node. The listen_list_lock is assumed to be
4318  * held when called.
4319  */
4320 static void irdma_qhash_ctrl(struct irdma_device *iwdev,
4321                              struct irdma_cm_listener *parent_listen_node,
4322                              struct irdma_cm_info *nfo, u32 *ipaddr, bool ipv4,
4323                              bool ifup)
4324 {
4325         struct list_head *child_listen_list = &parent_listen_node->child_listen_list;
4326         struct irdma_cm_listener *child_listen_node;
4327         struct list_head *pos, *tpos;
4328         enum irdma_status_code err;
4329         bool node_allocated = false;
4330         enum irdma_quad_hash_manage_type op = ifup ?
4331                                               IRDMA_QHASH_MANAGE_TYPE_ADD :
4332                                               IRDMA_QHASH_MANAGE_TYPE_DELETE;
4333
4334         list_for_each_safe (pos, tpos, child_listen_list) {
4335                 child_listen_node = list_entry(pos, struct irdma_cm_listener,
4336                                                child_listen_list);
4337                 if (!memcmp(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16))
4338                         goto set_qhash;
4339         }
4340
4341         /* if not found then add a child listener if interface is going up */
4342         if (!ifup)
4343                 return;
4344         child_listen_node = kmemdup(parent_listen_node,
4345                                     sizeof(*child_listen_node), GFP_ATOMIC);
4346         if (!child_listen_node)
4347                 return;
4348
4349         node_allocated = true;
4350         memcpy(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16);
4351
4352 set_qhash:
4353         memcpy(nfo->loc_addr, child_listen_node->loc_addr,
4354                sizeof(nfo->loc_addr));
4355         nfo->vlan_id = child_listen_node->vlan_id;
4356         err = irdma_manage_qhash(iwdev, nfo, IRDMA_QHASH_TYPE_TCP_SYN, op, NULL,
4357                                  false);
4358         if (!err) {
4359                 child_listen_node->qhash_set = ifup;
4360                 if (node_allocated)
4361                         list_add(&child_listen_node->child_listen_list,
4362                                  &parent_listen_node->child_listen_list);
4363         } else if (node_allocated) {
4364                 kfree(child_listen_node);
4365         }
4366 }
4367
4368 /**
4369  * irdma_if_notify - process an ifdown on an interface
4370  * @iwdev: device pointer
4371  * @netdev: network device structure
4372  * @ipaddr: Pointer to IPv4 or IPv6 address
4373  * @ipv4: flag indicating IPv4 when true
4374  * @ifup: flag indicating interface up when true
4375  */
4376 void irdma_if_notify(struct irdma_device *iwdev, struct net_device *netdev,
4377                      u32 *ipaddr, bool ipv4, bool ifup)
4378 {
4379         struct irdma_cm_core *cm_core = &iwdev->cm_core;
4380         unsigned long flags;
4381         struct irdma_cm_listener *listen_node;
4382         static const u32 ip_zero[4] = { 0, 0, 0, 0 };
4383         struct irdma_cm_info nfo = {};
4384         u16 vlan_id = rdma_vlan_dev_vlan_id(netdev);
4385         enum irdma_quad_hash_manage_type op = ifup ?
4386                                               IRDMA_QHASH_MANAGE_TYPE_ADD :
4387                                               IRDMA_QHASH_MANAGE_TYPE_DELETE;
4388
4389         nfo.vlan_id = vlan_id;
4390         nfo.ipv4 = ipv4;
4391         nfo.qh_qpid = 1;
4392
4393         /* Disable or enable qhash for listeners */
4394         spin_lock_irqsave(&cm_core->listen_list_lock, flags);
4395         list_for_each_entry (listen_node, &cm_core->listen_list, list) {
4396                 if (vlan_id != listen_node->vlan_id ||
4397                     (memcmp(listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16) &&
4398                      memcmp(listen_node->loc_addr, ip_zero, ipv4 ? 4 : 16)))
4399                         continue;
4400
4401                 memcpy(nfo.loc_addr, listen_node->loc_addr,
4402                        sizeof(nfo.loc_addr));
4403                 nfo.loc_port = listen_node->loc_port;
4404                 nfo.user_pri = listen_node->user_pri;
4405                 if (!list_empty(&listen_node->child_listen_list)) {
4406                         irdma_qhash_ctrl(iwdev, listen_node, &nfo, ipaddr, ipv4,
4407                                          ifup);
4408                 } else if (memcmp(listen_node->loc_addr, ip_zero,
4409                                   ipv4 ? 4 : 16)) {
4410                         if (!irdma_manage_qhash(iwdev, &nfo,
4411                                                 IRDMA_QHASH_TYPE_TCP_SYN, op,
4412                                                 NULL, false))
4413                                 listen_node->qhash_set = ifup;
4414                 }
4415         }
4416         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
4417
4418         /* disconnect any connected qp's on ifdown */
4419         if (!ifup)
4420                 irdma_cm_teardown_connections(iwdev, ipaddr, &nfo, false);
4421 }