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                 if (listen_port != dst_port ||
1481                     !(listener_state & listen_node->listener_state))
1482                         continue;
1483                 /* compare node pair, return node handle if a match */
1484                 if (!memcmp(listen_addr, ip_zero, sizeof(listen_addr)) ||
1485                     (!memcmp(listen_addr, dst_addr, sizeof(listen_addr)) &&
1486                      vlan_id == listen_node->vlan_id)) {
1487                         refcount_inc(&listen_node->refcnt);
1488                         spin_unlock_irqrestore(&cm_core->listen_list_lock,
1489                                                flags);
1490                         trace_irdma_find_listener(listen_node);
1491                         return listen_node;
1492                 }
1493         }
1494         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1495
1496         return NULL;
1497 }
1498
1499 /**
1500  * irdma_del_multiple_qhash - Remove qhash and child listens
1501  * @iwdev: iWarp device
1502  * @cm_info: CM info for parent listen node
1503  * @cm_parent_listen_node: The parent listen node
1504  */
1505 static int 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         struct list_head *pos, *tpos;
1511         unsigned long flags;
1512         int ret = -EINVAL;
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 int irdma_add_mqh_6(struct irdma_device *iwdev,
1622                            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         struct irdma_cm_listener *child_listen_node;
1629         unsigned long flags;
1630         int ret = 0;
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 = -ENOMEM;
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 int irdma_add_mqh_4(struct irdma_device *iwdev,
1704                            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         unsigned long flags;
1711         const struct in_ifaddr *ifa;
1712         int ret = 0;
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 = -ENOMEM;
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 int irdma_add_mqh(struct irdma_device *iwdev,
1785                          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_vlan_mode)
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                 if (iwdev->vsi.dscp_mode) {
2213                         cm_node->user_pri = listener->user_pri;
2214                 } else {
2215                         cm_node->tos = max(listener->tos, cm_info->tos);
2216                         cm_node->user_pri = rt_tos2priority(cm_node->tos);
2217                 }
2218                 ibdev_dbg(&iwdev->ibdev,
2219                           "DCB: listener: TOS:[%d] UP:[%d]\n", cm_node->tos,
2220                           cm_node->user_pri);
2221                 trace_irdma_listener_tos(iwdev, cm_node->tos,
2222                                          cm_node->user_pri);
2223         }
2224         memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr));
2225         memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr));
2226         cm_node->loc_port = cm_info->loc_port;
2227         cm_node->rem_port = cm_info->rem_port;
2228
2229         cm_node->mpa_frame_rev = IRDMA_CM_DEFAULT_MPA_VER;
2230         cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
2231         cm_node->iwdev = iwdev;
2232         cm_node->dev = &iwdev->rf->sc_dev;
2233
2234         cm_node->ird_size = cm_node->dev->hw_attrs.max_hw_ird;
2235         cm_node->ord_size = cm_node->dev->hw_attrs.max_hw_ord;
2236
2237         cm_node->listener = listener;
2238         cm_node->cm_id = cm_info->cm_id;
2239         ether_addr_copy(cm_node->loc_mac, netdev->dev_addr);
2240         spin_lock_init(&cm_node->retrans_list_lock);
2241         cm_node->ack_rcvd = false;
2242
2243         init_completion(&cm_node->establish_comp);
2244         refcount_set(&cm_node->refcnt, 1);
2245         /* associate our parent CM core */
2246         cm_node->cm_core = cm_core;
2247         cm_node->tcp_cntxt.loc_id = IRDMA_CM_DEFAULT_LOCAL_ID;
2248         cm_node->tcp_cntxt.rcv_wscale = iwdev->rcv_wscale;
2249         cm_node->tcp_cntxt.rcv_wnd = iwdev->rcv_wnd >> cm_node->tcp_cntxt.rcv_wscale;
2250         if (cm_node->ipv4) {
2251                 cm_node->tcp_cntxt.loc_seq_num = secure_tcp_seq(htonl(cm_node->loc_addr[0]),
2252                                                                 htonl(cm_node->rem_addr[0]),
2253                                                                 htons(cm_node->loc_port),
2254                                                                 htons(cm_node->rem_port));
2255                 cm_node->tcp_cntxt.mss = iwdev->vsi.mtu - IRDMA_MTU_TO_MSS_IPV4;
2256         } else if (IS_ENABLED(CONFIG_IPV6)) {
2257                 __be32 loc[4] = {
2258                         htonl(cm_node->loc_addr[0]), htonl(cm_node->loc_addr[1]),
2259                         htonl(cm_node->loc_addr[2]), htonl(cm_node->loc_addr[3])
2260                 };
2261                 __be32 rem[4] = {
2262                         htonl(cm_node->rem_addr[0]), htonl(cm_node->rem_addr[1]),
2263                         htonl(cm_node->rem_addr[2]), htonl(cm_node->rem_addr[3])
2264                 };
2265                 cm_node->tcp_cntxt.loc_seq_num = secure_tcpv6_seq(loc, rem,
2266                                                                   htons(cm_node->loc_port),
2267                                                                   htons(cm_node->rem_port));
2268                 cm_node->tcp_cntxt.mss = iwdev->vsi.mtu - IRDMA_MTU_TO_MSS_IPV6;
2269         }
2270
2271         if ((cm_node->ipv4 &&
2272              irdma_ipv4_is_lpb(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
2273             (!cm_node->ipv4 &&
2274              irdma_ipv6_is_lpb(cm_node->loc_addr, cm_node->rem_addr))) {
2275                 cm_node->do_lpb = true;
2276                 arpindex = irdma_arp_table(iwdev->rf, cm_node->rem_addr,
2277                                            cm_node->ipv4, NULL,
2278                                            IRDMA_ARP_RESOLVE);
2279         } else {
2280                 oldarpindex = irdma_arp_table(iwdev->rf, cm_node->rem_addr,
2281                                               cm_node->ipv4, NULL,
2282                                               IRDMA_ARP_RESOLVE);
2283                 if (cm_node->ipv4)
2284                         arpindex = irdma_addr_resolve_neigh(iwdev,
2285                                                             cm_info->loc_addr[0],
2286                                                             cm_info->rem_addr[0],
2287                                                             oldarpindex);
2288                 else if (IS_ENABLED(CONFIG_IPV6))
2289                         arpindex = irdma_addr_resolve_neigh_ipv6(iwdev,
2290                                                                  cm_info->loc_addr,
2291                                                                  cm_info->rem_addr,
2292                                                                  oldarpindex);
2293                 else
2294                         arpindex = -EINVAL;
2295         }
2296
2297         if (arpindex < 0)
2298                 goto err;
2299
2300         ether_addr_copy(cm_node->rem_mac,
2301                         iwdev->rf->arp_table[arpindex].mac_addr);
2302         irdma_add_hte_node(cm_core, cm_node);
2303         cm_core->stats_nodes_created++;
2304         return cm_node;
2305
2306 err:
2307         kfree(cm_node);
2308
2309         return NULL;
2310 }
2311
2312 static void irdma_destroy_connection(struct irdma_cm_node *cm_node)
2313 {
2314         struct irdma_cm_core *cm_core = cm_node->cm_core;
2315         struct irdma_qp *iwqp;
2316         struct irdma_cm_info nfo;
2317
2318         /* if the node is destroyed before connection was accelerated */
2319         if (!cm_node->accelerated && cm_node->accept_pend) {
2320                 ibdev_dbg(&cm_node->iwdev->ibdev,
2321                           "CM: node destroyed before established\n");
2322                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
2323         }
2324         if (cm_node->close_entry)
2325                 irdma_handle_close_entry(cm_node, 0);
2326         if (cm_node->listener) {
2327                 irdma_dec_refcnt_listen(cm_core, cm_node->listener, 0, true);
2328         } else {
2329                 if (cm_node->apbvt_set) {
2330                         irdma_del_apbvt(cm_node->iwdev, cm_node->apbvt_entry);
2331                         cm_node->apbvt_set = 0;
2332                 }
2333                 irdma_get_addr_info(cm_node, &nfo);
2334                 if (cm_node->qhash_set) {
2335                         nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id;
2336                         irdma_manage_qhash(cm_node->iwdev, &nfo,
2337                                            IRDMA_QHASH_TYPE_TCP_ESTABLISHED,
2338                                            IRDMA_QHASH_MANAGE_TYPE_DELETE, NULL,
2339                                            false);
2340                         cm_node->qhash_set = 0;
2341                 }
2342         }
2343
2344         iwqp = cm_node->iwqp;
2345         if (iwqp) {
2346                 cm_node->cm_id->rem_ref(cm_node->cm_id);
2347                 cm_node->cm_id = NULL;
2348                 iwqp->cm_id = NULL;
2349                 irdma_qp_rem_ref(&iwqp->ibqp);
2350                 cm_node->iwqp = NULL;
2351         } else if (cm_node->qhash_set) {
2352                 irdma_get_addr_info(cm_node, &nfo);
2353                 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id;
2354                 irdma_manage_qhash(cm_node->iwdev, &nfo,
2355                                    IRDMA_QHASH_TYPE_TCP_ESTABLISHED,
2356                                    IRDMA_QHASH_MANAGE_TYPE_DELETE, NULL, false);
2357                 cm_node->qhash_set = 0;
2358         }
2359
2360         cm_core->cm_free_ah(cm_node);
2361 }
2362
2363 /**
2364  * irdma_rem_ref_cm_node - destroy an instance of a cm node
2365  * @cm_node: connection's node
2366  */
2367 void irdma_rem_ref_cm_node(struct irdma_cm_node *cm_node)
2368 {
2369         struct irdma_cm_core *cm_core = cm_node->cm_core;
2370         unsigned long flags;
2371
2372         trace_irdma_rem_ref_cm_node(cm_node, 0, __builtin_return_address(0));
2373         spin_lock_irqsave(&cm_core->ht_lock, flags);
2374
2375         if (!refcount_dec_and_test(&cm_node->refcnt)) {
2376                 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
2377                 return;
2378         }
2379         if (cm_node->iwqp) {
2380                 cm_node->iwqp->cm_node = NULL;
2381                 cm_node->iwqp->cm_id = NULL;
2382         }
2383         hash_del_rcu(&cm_node->list);
2384         cm_node->cm_core->stats_nodes_destroyed++;
2385
2386         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
2387
2388         irdma_destroy_connection(cm_node);
2389
2390         kfree_rcu(cm_node, rcu_head);
2391 }
2392
2393 /**
2394  * irdma_handle_fin_pkt - FIN packet received
2395  * @cm_node: connection's node
2396  */
2397 static void irdma_handle_fin_pkt(struct irdma_cm_node *cm_node)
2398 {
2399         switch (cm_node->state) {
2400         case IRDMA_CM_STATE_SYN_RCVD:
2401         case IRDMA_CM_STATE_SYN_SENT:
2402         case IRDMA_CM_STATE_ESTABLISHED:
2403         case IRDMA_CM_STATE_MPAREJ_RCVD:
2404                 cm_node->tcp_cntxt.rcv_nxt++;
2405                 irdma_cleanup_retrans_entry(cm_node);
2406                 cm_node->state = IRDMA_CM_STATE_LAST_ACK;
2407                 irdma_send_fin(cm_node);
2408                 break;
2409         case IRDMA_CM_STATE_MPAREQ_SENT:
2410                 irdma_create_event(cm_node, IRDMA_CM_EVENT_ABORTED);
2411                 cm_node->tcp_cntxt.rcv_nxt++;
2412                 irdma_cleanup_retrans_entry(cm_node);
2413                 cm_node->state = IRDMA_CM_STATE_CLOSED;
2414                 refcount_inc(&cm_node->refcnt);
2415                 irdma_send_reset(cm_node);
2416                 break;
2417         case IRDMA_CM_STATE_FIN_WAIT1:
2418                 cm_node->tcp_cntxt.rcv_nxt++;
2419                 irdma_cleanup_retrans_entry(cm_node);
2420                 cm_node->state = IRDMA_CM_STATE_CLOSING;
2421                 irdma_send_ack(cm_node);
2422                 /*
2423                  * Wait for ACK as this is simultaneous close.
2424                  * After we receive ACK, do not send anything.
2425                  * Just rm the node.
2426                  */
2427                 break;
2428         case IRDMA_CM_STATE_FIN_WAIT2:
2429                 cm_node->tcp_cntxt.rcv_nxt++;
2430                 irdma_cleanup_retrans_entry(cm_node);
2431                 cm_node->state = IRDMA_CM_STATE_TIME_WAIT;
2432                 irdma_send_ack(cm_node);
2433                 irdma_schedule_cm_timer(cm_node, NULL, IRDMA_TIMER_TYPE_CLOSE,
2434                                         1, 0);
2435                 break;
2436         case IRDMA_CM_STATE_TIME_WAIT:
2437                 cm_node->tcp_cntxt.rcv_nxt++;
2438                 irdma_cleanup_retrans_entry(cm_node);
2439                 cm_node->state = IRDMA_CM_STATE_CLOSED;
2440                 irdma_rem_ref_cm_node(cm_node);
2441                 break;
2442         case IRDMA_CM_STATE_OFFLOADED:
2443         default:
2444                 ibdev_dbg(&cm_node->iwdev->ibdev,
2445                           "CM: bad state node state = %d\n", cm_node->state);
2446                 break;
2447         }
2448 }
2449
2450 /**
2451  * irdma_handle_rst_pkt - process received RST packet
2452  * @cm_node: connection's node
2453  * @rbuf: receive buffer
2454  */
2455 static void irdma_handle_rst_pkt(struct irdma_cm_node *cm_node,
2456                                  struct irdma_puda_buf *rbuf)
2457 {
2458         ibdev_dbg(&cm_node->iwdev->ibdev,
2459                   "CM: caller: %pS cm_node=%p state=%d rem_port=0x%04x loc_port=0x%04x rem_addr=%pI4 loc_addr=%pI4\n",
2460                   __builtin_return_address(0), cm_node, cm_node->state,
2461                   cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr,
2462                   cm_node->loc_addr);
2463
2464         irdma_cleanup_retrans_entry(cm_node);
2465         switch (cm_node->state) {
2466         case IRDMA_CM_STATE_SYN_SENT:
2467         case IRDMA_CM_STATE_MPAREQ_SENT:
2468                 switch (cm_node->mpa_frame_rev) {
2469                 case IETF_MPA_V2:
2470                         /* Drop down to MPA_V1*/
2471                         cm_node->mpa_frame_rev = IETF_MPA_V1;
2472                         /* send a syn and goto syn sent state */
2473                         cm_node->state = IRDMA_CM_STATE_SYN_SENT;
2474                         if (irdma_send_syn(cm_node, 0))
2475                                 irdma_active_open_err(cm_node, false);
2476                         break;
2477                 case IETF_MPA_V1:
2478                 default:
2479                         irdma_active_open_err(cm_node, false);
2480                         break;
2481                 }
2482                 break;
2483         case IRDMA_CM_STATE_MPAREQ_RCVD:
2484                 atomic_inc(&cm_node->passive_state);
2485                 break;
2486         case IRDMA_CM_STATE_ESTABLISHED:
2487         case IRDMA_CM_STATE_SYN_RCVD:
2488         case IRDMA_CM_STATE_LISTENING:
2489                 irdma_passive_open_err(cm_node, false);
2490                 break;
2491         case IRDMA_CM_STATE_OFFLOADED:
2492                 irdma_active_open_err(cm_node, false);
2493                 break;
2494         case IRDMA_CM_STATE_CLOSED:
2495                 break;
2496         case IRDMA_CM_STATE_FIN_WAIT2:
2497         case IRDMA_CM_STATE_FIN_WAIT1:
2498         case IRDMA_CM_STATE_LAST_ACK:
2499         case IRDMA_CM_STATE_TIME_WAIT:
2500                 cm_node->state = IRDMA_CM_STATE_CLOSED;
2501                 irdma_rem_ref_cm_node(cm_node);
2502                 break;
2503         default:
2504                 break;
2505         }
2506 }
2507
2508 /**
2509  * irdma_handle_rcv_mpa - Process a recv'd mpa buffer
2510  * @cm_node: connection's node
2511  * @rbuf: receive buffer
2512  */
2513 static void irdma_handle_rcv_mpa(struct irdma_cm_node *cm_node,
2514                                  struct irdma_puda_buf *rbuf)
2515 {
2516         int err;
2517         int datasize = rbuf->datalen;
2518         u8 *dataloc = rbuf->data;
2519
2520         enum irdma_cm_event_type type = IRDMA_CM_EVENT_UNKNOWN;
2521         u32 res_type;
2522
2523         err = irdma_parse_mpa(cm_node, dataloc, &res_type, datasize);
2524         if (err) {
2525                 if (cm_node->state == IRDMA_CM_STATE_MPAREQ_SENT)
2526                         irdma_active_open_err(cm_node, true);
2527                 else
2528                         irdma_passive_open_err(cm_node, true);
2529                 return;
2530         }
2531
2532         switch (cm_node->state) {
2533         case IRDMA_CM_STATE_ESTABLISHED:
2534                 if (res_type == IRDMA_MPA_REQUEST_REJECT)
2535                         ibdev_dbg(&cm_node->iwdev->ibdev,
2536                                   "CM: state for reject\n");
2537                 cm_node->state = IRDMA_CM_STATE_MPAREQ_RCVD;
2538                 type = IRDMA_CM_EVENT_MPA_REQ;
2539                 irdma_send_ack(cm_node); /* ACK received MPA request */
2540                 atomic_set(&cm_node->passive_state,
2541                            IRDMA_PASSIVE_STATE_INDICATED);
2542                 break;
2543         case IRDMA_CM_STATE_MPAREQ_SENT:
2544                 irdma_cleanup_retrans_entry(cm_node);
2545                 if (res_type == IRDMA_MPA_REQUEST_REJECT) {
2546                         type = IRDMA_CM_EVENT_MPA_REJECT;
2547                         cm_node->state = IRDMA_CM_STATE_MPAREJ_RCVD;
2548                 } else {
2549                         type = IRDMA_CM_EVENT_CONNECTED;
2550                         cm_node->state = IRDMA_CM_STATE_OFFLOADED;
2551                 }
2552                 irdma_send_ack(cm_node);
2553                 break;
2554         default:
2555                 ibdev_dbg(&cm_node->iwdev->ibdev,
2556                           "CM: wrong cm_node state =%d\n", cm_node->state);
2557                 break;
2558         }
2559         irdma_create_event(cm_node, type);
2560 }
2561
2562 /**
2563  * irdma_check_syn - Check for error on received syn ack
2564  * @cm_node: connection's node
2565  * @tcph: pointer tcp header
2566  */
2567 static int irdma_check_syn(struct irdma_cm_node *cm_node, struct tcphdr *tcph)
2568 {
2569         if (ntohl(tcph->ack_seq) != cm_node->tcp_cntxt.loc_seq_num) {
2570                 irdma_active_open_err(cm_node, true);
2571                 return 1;
2572         }
2573
2574         return 0;
2575 }
2576
2577 /**
2578  * irdma_check_seq - check seq numbers if OK
2579  * @cm_node: connection's node
2580  * @tcph: pointer tcp header
2581  */
2582 static int irdma_check_seq(struct irdma_cm_node *cm_node, struct tcphdr *tcph)
2583 {
2584         u32 seq;
2585         u32 ack_seq;
2586         u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
2587         u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
2588         u32 rcv_wnd;
2589         int err = 0;
2590
2591         seq = ntohl(tcph->seq);
2592         ack_seq = ntohl(tcph->ack_seq);
2593         rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
2594         if (ack_seq != loc_seq_num ||
2595             !between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
2596                 err = -1;
2597         if (err)
2598                 ibdev_dbg(&cm_node->iwdev->ibdev,
2599                           "CM: seq number err\n");
2600
2601         return err;
2602 }
2603
2604 void irdma_add_conn_est_qh(struct irdma_cm_node *cm_node)
2605 {
2606         struct irdma_cm_info nfo;
2607
2608         irdma_get_addr_info(cm_node, &nfo);
2609         nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id;
2610         irdma_manage_qhash(cm_node->iwdev, &nfo,
2611                            IRDMA_QHASH_TYPE_TCP_ESTABLISHED,
2612                            IRDMA_QHASH_MANAGE_TYPE_ADD,
2613                            cm_node, false);
2614         cm_node->qhash_set = true;
2615 }
2616
2617 /**
2618  * irdma_handle_syn_pkt - is for Passive node
2619  * @cm_node: connection's node
2620  * @rbuf: receive buffer
2621  */
2622 static void irdma_handle_syn_pkt(struct irdma_cm_node *cm_node,
2623                                  struct irdma_puda_buf *rbuf)
2624 {
2625         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2626         int err;
2627         u32 inc_sequence;
2628         int optionsize;
2629
2630         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2631         inc_sequence = ntohl(tcph->seq);
2632
2633         switch (cm_node->state) {
2634         case IRDMA_CM_STATE_SYN_SENT:
2635         case IRDMA_CM_STATE_MPAREQ_SENT:
2636                 /* Rcvd syn on active open connection */
2637                 irdma_active_open_err(cm_node, 1);
2638                 break;
2639         case IRDMA_CM_STATE_LISTENING:
2640                 /* Passive OPEN */
2641                 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
2642                     cm_node->listener->backlog) {
2643                         cm_node->cm_core->stats_backlog_drops++;
2644                         irdma_passive_open_err(cm_node, false);
2645                         break;
2646                 }
2647                 err = irdma_handle_tcp_options(cm_node, tcph, optionsize, 1);
2648                 if (err) {
2649                         irdma_passive_open_err(cm_node, false);
2650                         /* drop pkt */
2651                         break;
2652                 }
2653                 err = cm_node->cm_core->cm_create_ah(cm_node, false);
2654                 if (err) {
2655                         irdma_passive_open_err(cm_node, false);
2656                         /* drop pkt */
2657                         break;
2658                 }
2659                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2660                 cm_node->accept_pend = 1;
2661                 atomic_inc(&cm_node->listener->pend_accepts_cnt);
2662
2663                 cm_node->state = IRDMA_CM_STATE_SYN_RCVD;
2664                 break;
2665         case IRDMA_CM_STATE_CLOSED:
2666                 irdma_cleanup_retrans_entry(cm_node);
2667                 refcount_inc(&cm_node->refcnt);
2668                 irdma_send_reset(cm_node);
2669                 break;
2670         case IRDMA_CM_STATE_OFFLOADED:
2671         case IRDMA_CM_STATE_ESTABLISHED:
2672         case IRDMA_CM_STATE_FIN_WAIT1:
2673         case IRDMA_CM_STATE_FIN_WAIT2:
2674         case IRDMA_CM_STATE_MPAREQ_RCVD:
2675         case IRDMA_CM_STATE_LAST_ACK:
2676         case IRDMA_CM_STATE_CLOSING:
2677         case IRDMA_CM_STATE_UNKNOWN:
2678         default:
2679                 break;
2680         }
2681 }
2682
2683 /**
2684  * irdma_handle_synack_pkt - Process SYN+ACK packet (active side)
2685  * @cm_node: connection's node
2686  * @rbuf: receive buffer
2687  */
2688 static void irdma_handle_synack_pkt(struct irdma_cm_node *cm_node,
2689                                     struct irdma_puda_buf *rbuf)
2690 {
2691         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2692         int err;
2693         u32 inc_sequence;
2694         int optionsize;
2695
2696         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2697         inc_sequence = ntohl(tcph->seq);
2698         switch (cm_node->state) {
2699         case IRDMA_CM_STATE_SYN_SENT:
2700                 irdma_cleanup_retrans_entry(cm_node);
2701                 /* active open */
2702                 if (irdma_check_syn(cm_node, tcph)) {
2703                         ibdev_dbg(&cm_node->iwdev->ibdev,
2704                                   "CM: check syn fail\n");
2705                         return;
2706                 }
2707                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2708                 /* setup options */
2709                 err = irdma_handle_tcp_options(cm_node, tcph, optionsize, 0);
2710                 if (err) {
2711                         ibdev_dbg(&cm_node->iwdev->ibdev,
2712                                   "CM: cm_node=%p tcp_options failed\n",
2713                                   cm_node);
2714                         break;
2715                 }
2716                 irdma_cleanup_retrans_entry(cm_node);
2717                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2718                 irdma_send_ack(cm_node); /* ACK  for the syn_ack */
2719                 err = irdma_send_mpa_request(cm_node);
2720                 if (err) {
2721                         ibdev_dbg(&cm_node->iwdev->ibdev,
2722                                   "CM: cm_node=%p irdma_send_mpa_request failed\n",
2723                                   cm_node);
2724                         break;
2725                 }
2726                 cm_node->state = IRDMA_CM_STATE_MPAREQ_SENT;
2727                 break;
2728         case IRDMA_CM_STATE_MPAREQ_RCVD:
2729                 irdma_passive_open_err(cm_node, true);
2730                 break;
2731         case IRDMA_CM_STATE_LISTENING:
2732                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2733                 irdma_cleanup_retrans_entry(cm_node);
2734                 cm_node->state = IRDMA_CM_STATE_CLOSED;
2735                 irdma_send_reset(cm_node);
2736                 break;
2737         case IRDMA_CM_STATE_CLOSED:
2738                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2739                 irdma_cleanup_retrans_entry(cm_node);
2740                 refcount_inc(&cm_node->refcnt);
2741                 irdma_send_reset(cm_node);
2742                 break;
2743         case IRDMA_CM_STATE_ESTABLISHED:
2744         case IRDMA_CM_STATE_FIN_WAIT1:
2745         case IRDMA_CM_STATE_FIN_WAIT2:
2746         case IRDMA_CM_STATE_LAST_ACK:
2747         case IRDMA_CM_STATE_OFFLOADED:
2748         case IRDMA_CM_STATE_CLOSING:
2749         case IRDMA_CM_STATE_UNKNOWN:
2750         case IRDMA_CM_STATE_MPAREQ_SENT:
2751         default:
2752                 break;
2753         }
2754 }
2755
2756 /**
2757  * irdma_handle_ack_pkt - process packet with ACK
2758  * @cm_node: connection's node
2759  * @rbuf: receive buffer
2760  */
2761 static int irdma_handle_ack_pkt(struct irdma_cm_node *cm_node,
2762                                 struct irdma_puda_buf *rbuf)
2763 {
2764         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2765         u32 inc_sequence;
2766         int ret;
2767         int optionsize;
2768         u32 datasize = rbuf->datalen;
2769
2770         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2771
2772         if (irdma_check_seq(cm_node, tcph))
2773                 return -EINVAL;
2774
2775         inc_sequence = ntohl(tcph->seq);
2776         switch (cm_node->state) {
2777         case IRDMA_CM_STATE_SYN_RCVD:
2778                 irdma_cleanup_retrans_entry(cm_node);
2779                 ret = irdma_handle_tcp_options(cm_node, tcph, optionsize, 1);
2780                 if (ret)
2781                         return ret;
2782                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2783                 cm_node->state = IRDMA_CM_STATE_ESTABLISHED;
2784                 if (datasize) {
2785                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2786                         irdma_handle_rcv_mpa(cm_node, rbuf);
2787                 }
2788                 break;
2789         case IRDMA_CM_STATE_ESTABLISHED:
2790                 irdma_cleanup_retrans_entry(cm_node);
2791                 if (datasize) {
2792                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2793                         irdma_handle_rcv_mpa(cm_node, rbuf);
2794                 }
2795                 break;
2796         case IRDMA_CM_STATE_MPAREQ_SENT:
2797                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2798                 if (datasize) {
2799                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2800                         cm_node->ack_rcvd = false;
2801                         irdma_handle_rcv_mpa(cm_node, rbuf);
2802                 } else {
2803                         cm_node->ack_rcvd = true;
2804                 }
2805                 break;
2806         case IRDMA_CM_STATE_LISTENING:
2807                 irdma_cleanup_retrans_entry(cm_node);
2808                 cm_node->state = IRDMA_CM_STATE_CLOSED;
2809                 irdma_send_reset(cm_node);
2810                 break;
2811         case IRDMA_CM_STATE_CLOSED:
2812                 irdma_cleanup_retrans_entry(cm_node);
2813                 refcount_inc(&cm_node->refcnt);
2814                 irdma_send_reset(cm_node);
2815                 break;
2816         case IRDMA_CM_STATE_LAST_ACK:
2817         case IRDMA_CM_STATE_CLOSING:
2818                 irdma_cleanup_retrans_entry(cm_node);
2819                 cm_node->state = IRDMA_CM_STATE_CLOSED;
2820                 irdma_rem_ref_cm_node(cm_node);
2821                 break;
2822         case IRDMA_CM_STATE_FIN_WAIT1:
2823                 irdma_cleanup_retrans_entry(cm_node);
2824                 cm_node->state = IRDMA_CM_STATE_FIN_WAIT2;
2825                 break;
2826         case IRDMA_CM_STATE_SYN_SENT:
2827         case IRDMA_CM_STATE_FIN_WAIT2:
2828         case IRDMA_CM_STATE_OFFLOADED:
2829         case IRDMA_CM_STATE_MPAREQ_RCVD:
2830         case IRDMA_CM_STATE_UNKNOWN:
2831         default:
2832                 irdma_cleanup_retrans_entry(cm_node);
2833                 break;
2834         }
2835
2836         return 0;
2837 }
2838
2839 /**
2840  * irdma_process_pkt - process cm packet
2841  * @cm_node: connection's node
2842  * @rbuf: receive buffer
2843  */
2844 static void irdma_process_pkt(struct irdma_cm_node *cm_node,
2845                               struct irdma_puda_buf *rbuf)
2846 {
2847         enum irdma_tcpip_pkt_type pkt_type = IRDMA_PKT_TYPE_UNKNOWN;
2848         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2849         u32 fin_set = 0;
2850         int err;
2851
2852         if (tcph->rst) {
2853                 pkt_type = IRDMA_PKT_TYPE_RST;
2854         } else if (tcph->syn) {
2855                 pkt_type = IRDMA_PKT_TYPE_SYN;
2856                 if (tcph->ack)
2857                         pkt_type = IRDMA_PKT_TYPE_SYNACK;
2858         } else if (tcph->ack) {
2859                 pkt_type = IRDMA_PKT_TYPE_ACK;
2860         }
2861         if (tcph->fin)
2862                 fin_set = 1;
2863
2864         switch (pkt_type) {
2865         case IRDMA_PKT_TYPE_SYN:
2866                 irdma_handle_syn_pkt(cm_node, rbuf);
2867                 break;
2868         case IRDMA_PKT_TYPE_SYNACK:
2869                 irdma_handle_synack_pkt(cm_node, rbuf);
2870                 break;
2871         case IRDMA_PKT_TYPE_ACK:
2872                 err = irdma_handle_ack_pkt(cm_node, rbuf);
2873                 if (fin_set && !err)
2874                         irdma_handle_fin_pkt(cm_node);
2875                 break;
2876         case IRDMA_PKT_TYPE_RST:
2877                 irdma_handle_rst_pkt(cm_node, rbuf);
2878                 break;
2879         default:
2880                 if (fin_set &&
2881                     (!irdma_check_seq(cm_node, (struct tcphdr *)rbuf->tcph)))
2882                         irdma_handle_fin_pkt(cm_node);
2883                 break;
2884         }
2885 }
2886
2887 /**
2888  * irdma_make_listen_node - create a listen node with params
2889  * @cm_core: cm's core
2890  * @iwdev: iwarp device structure
2891  * @cm_info: quad info for connection
2892  */
2893 static struct irdma_cm_listener *
2894 irdma_make_listen_node(struct irdma_cm_core *cm_core,
2895                        struct irdma_device *iwdev,
2896                        struct irdma_cm_info *cm_info)
2897 {
2898         struct irdma_cm_listener *listener;
2899         unsigned long flags;
2900
2901         /* cannot have multiple matching listeners */
2902         listener = irdma_find_listener(cm_core, cm_info->loc_addr,
2903                                        cm_info->loc_port, cm_info->vlan_id,
2904                                        IRDMA_CM_LISTENER_EITHER_STATE);
2905         if (listener &&
2906             listener->listener_state == IRDMA_CM_LISTENER_ACTIVE_STATE) {
2907                 refcount_dec(&listener->refcnt);
2908                 return NULL;
2909         }
2910
2911         if (!listener) {
2912                 /* create a CM listen node
2913                  * 1/2 node to compare incoming traffic to
2914                  */
2915                 listener = kzalloc(sizeof(*listener), GFP_KERNEL);
2916                 if (!listener)
2917                         return NULL;
2918                 cm_core->stats_listen_nodes_created++;
2919                 memcpy(listener->loc_addr, cm_info->loc_addr,
2920                        sizeof(listener->loc_addr));
2921                 listener->loc_port = cm_info->loc_port;
2922
2923                 INIT_LIST_HEAD(&listener->child_listen_list);
2924
2925                 refcount_set(&listener->refcnt, 1);
2926         } else {
2927                 listener->reused_node = 1;
2928         }
2929
2930         listener->cm_id = cm_info->cm_id;
2931         listener->ipv4 = cm_info->ipv4;
2932         listener->vlan_id = cm_info->vlan_id;
2933         atomic_set(&listener->pend_accepts_cnt, 0);
2934         listener->cm_core = cm_core;
2935         listener->iwdev = iwdev;
2936
2937         listener->backlog = cm_info->backlog;
2938         listener->listener_state = IRDMA_CM_LISTENER_ACTIVE_STATE;
2939
2940         if (!listener->reused_node) {
2941                 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2942                 list_add(&listener->list, &cm_core->listen_list);
2943                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2944         }
2945
2946         return listener;
2947 }
2948
2949 /**
2950  * irdma_create_cm_node - make a connection node with params
2951  * @cm_core: cm's core
2952  * @iwdev: iwarp device structure
2953  * @conn_param: connection parameters
2954  * @cm_info: quad info for connection
2955  * @caller_cm_node: pointer to cm_node structure to return
2956  */
2957 static int irdma_create_cm_node(struct irdma_cm_core *cm_core,
2958                                 struct irdma_device *iwdev,
2959                                 struct iw_cm_conn_param *conn_param,
2960                                 struct irdma_cm_info *cm_info,
2961                                 struct irdma_cm_node **caller_cm_node)
2962 {
2963         struct irdma_cm_node *cm_node;
2964         u16 private_data_len = conn_param->private_data_len;
2965         const void *private_data = conn_param->private_data;
2966
2967         /* create a CM connection node */
2968         cm_node = irdma_make_cm_node(cm_core, iwdev, cm_info, NULL);
2969         if (!cm_node)
2970                 return -ENOMEM;
2971
2972         /* set our node side to client (active) side */
2973         cm_node->tcp_cntxt.client = 1;
2974         cm_node->tcp_cntxt.rcv_wscale = IRDMA_CM_DEFAULT_RCV_WND_SCALE;
2975
2976         irdma_record_ird_ord(cm_node, conn_param->ird, conn_param->ord);
2977
2978         cm_node->pdata.size = private_data_len;
2979         cm_node->pdata.addr = cm_node->pdata_buf;
2980
2981         memcpy(cm_node->pdata_buf, private_data, private_data_len);
2982         *caller_cm_node = cm_node;
2983
2984         return 0;
2985 }
2986
2987 /**
2988  * irdma_cm_reject - reject and teardown a connection
2989  * @cm_node: connection's node
2990  * @pdata: ptr to private data for reject
2991  * @plen: size of private data
2992  */
2993 static int irdma_cm_reject(struct irdma_cm_node *cm_node, const void *pdata,
2994                            u8 plen)
2995 {
2996         int ret;
2997         int passive_state;
2998
2999         if (cm_node->tcp_cntxt.client)
3000                 return 0;
3001
3002         irdma_cleanup_retrans_entry(cm_node);
3003
3004         passive_state = atomic_add_return(1, &cm_node->passive_state);
3005         if (passive_state == IRDMA_SEND_RESET_EVENT) {
3006                 cm_node->state = IRDMA_CM_STATE_CLOSED;
3007                 irdma_rem_ref_cm_node(cm_node);
3008                 return 0;
3009         }
3010
3011         if (cm_node->state == IRDMA_CM_STATE_LISTENER_DESTROYED) {
3012                 irdma_rem_ref_cm_node(cm_node);
3013                 return 0;
3014         }
3015
3016         ret = irdma_send_mpa_reject(cm_node, pdata, plen);
3017         if (!ret)
3018                 return 0;
3019
3020         cm_node->state = IRDMA_CM_STATE_CLOSED;
3021         if (irdma_send_reset(cm_node))
3022                 ibdev_dbg(&cm_node->iwdev->ibdev,
3023                           "CM: send reset failed\n");
3024
3025         return ret;
3026 }
3027
3028 /**
3029  * irdma_cm_close - close of cm connection
3030  * @cm_node: connection's node
3031  */
3032 static int irdma_cm_close(struct irdma_cm_node *cm_node)
3033 {
3034         switch (cm_node->state) {
3035         case IRDMA_CM_STATE_SYN_RCVD:
3036         case IRDMA_CM_STATE_SYN_SENT:
3037         case IRDMA_CM_STATE_ONE_SIDE_ESTABLISHED:
3038         case IRDMA_CM_STATE_ESTABLISHED:
3039         case IRDMA_CM_STATE_ACCEPTING:
3040         case IRDMA_CM_STATE_MPAREQ_SENT:
3041         case IRDMA_CM_STATE_MPAREQ_RCVD:
3042                 irdma_cleanup_retrans_entry(cm_node);
3043                 irdma_send_reset(cm_node);
3044                 break;
3045         case IRDMA_CM_STATE_CLOSE_WAIT:
3046                 cm_node->state = IRDMA_CM_STATE_LAST_ACK;
3047                 irdma_send_fin(cm_node);
3048                 break;
3049         case IRDMA_CM_STATE_FIN_WAIT1:
3050         case IRDMA_CM_STATE_FIN_WAIT2:
3051         case IRDMA_CM_STATE_LAST_ACK:
3052         case IRDMA_CM_STATE_TIME_WAIT:
3053         case IRDMA_CM_STATE_CLOSING:
3054                 return -EINVAL;
3055         case IRDMA_CM_STATE_LISTENING:
3056                 irdma_cleanup_retrans_entry(cm_node);
3057                 irdma_send_reset(cm_node);
3058                 break;
3059         case IRDMA_CM_STATE_MPAREJ_RCVD:
3060         case IRDMA_CM_STATE_UNKNOWN:
3061         case IRDMA_CM_STATE_INITED:
3062         case IRDMA_CM_STATE_CLOSED:
3063         case IRDMA_CM_STATE_LISTENER_DESTROYED:
3064                 irdma_rem_ref_cm_node(cm_node);
3065                 break;
3066         case IRDMA_CM_STATE_OFFLOADED:
3067                 if (cm_node->send_entry)
3068                         ibdev_dbg(&cm_node->iwdev->ibdev,
3069                                   "CM: CM send_entry in OFFLOADED state\n");
3070                 irdma_rem_ref_cm_node(cm_node);
3071                 break;
3072         }
3073
3074         return 0;
3075 }
3076
3077 /**
3078  * irdma_receive_ilq - recv an ETHERNET packet, and process it
3079  * through CM
3080  * @vsi: VSI structure of dev
3081  * @rbuf: receive buffer
3082  */
3083 void irdma_receive_ilq(struct irdma_sc_vsi *vsi, struct irdma_puda_buf *rbuf)
3084 {
3085         struct irdma_cm_node *cm_node;
3086         struct irdma_cm_listener *listener;
3087         struct iphdr *iph;
3088         struct ipv6hdr *ip6h;
3089         struct tcphdr *tcph;
3090         struct irdma_cm_info cm_info = {};
3091         struct irdma_device *iwdev = vsi->back_vsi;
3092         struct irdma_cm_core *cm_core = &iwdev->cm_core;
3093         struct vlan_ethhdr *ethh;
3094         u16 vtag;
3095
3096         /* if vlan, then maclen = 18 else 14 */
3097         iph = (struct iphdr *)rbuf->iph;
3098         print_hex_dump_debug("ILQ: RECEIVE ILQ BUFFER", DUMP_PREFIX_OFFSET,
3099                              16, 8, rbuf->mem.va, rbuf->totallen, false);
3100         if (iwdev->rf->sc_dev.hw_attrs.uk_attrs.hw_rev >= IRDMA_GEN_2) {
3101                 if (rbuf->vlan_valid) {
3102                         vtag = rbuf->vlan_id;
3103                         cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >>
3104                                            VLAN_PRIO_SHIFT;
3105                         cm_info.vlan_id = vtag & VLAN_VID_MASK;
3106                 } else {
3107                         cm_info.vlan_id = 0xFFFF;
3108                 }
3109         } else {
3110                 ethh = rbuf->mem.va;
3111
3112                 if (ethh->h_vlan_proto == htons(ETH_P_8021Q)) {
3113                         vtag = ntohs(ethh->h_vlan_TCI);
3114                         cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >>
3115                                            VLAN_PRIO_SHIFT;
3116                         cm_info.vlan_id = vtag & VLAN_VID_MASK;
3117                         ibdev_dbg(&cm_core->iwdev->ibdev,
3118                                   "CM: vlan_id=%d\n", cm_info.vlan_id);
3119                 } else {
3120                         cm_info.vlan_id = 0xFFFF;
3121                 }
3122         }
3123         tcph = (struct tcphdr *)rbuf->tcph;
3124
3125         if (rbuf->ipv4) {
3126                 cm_info.loc_addr[0] = ntohl(iph->daddr);
3127                 cm_info.rem_addr[0] = ntohl(iph->saddr);
3128                 cm_info.ipv4 = true;
3129                 cm_info.tos = iph->tos;
3130         } else {
3131                 ip6h = (struct ipv6hdr *)rbuf->iph;
3132                 irdma_copy_ip_ntohl(cm_info.loc_addr,
3133                                     ip6h->daddr.in6_u.u6_addr32);
3134                 irdma_copy_ip_ntohl(cm_info.rem_addr,
3135                                     ip6h->saddr.in6_u.u6_addr32);
3136                 cm_info.ipv4 = false;
3137                 cm_info.tos = (ip6h->priority << 4) | (ip6h->flow_lbl[0] >> 4);
3138         }
3139         cm_info.loc_port = ntohs(tcph->dest);
3140         cm_info.rem_port = ntohs(tcph->source);
3141         cm_node = irdma_find_node(cm_core, cm_info.rem_port, cm_info.rem_addr,
3142                                   cm_info.loc_port, cm_info.loc_addr, cm_info.vlan_id);
3143
3144         if (!cm_node) {
3145                 /* Only type of packet accepted are for the
3146                  * PASSIVE open (syn only)
3147                  */
3148                 if (!tcph->syn || tcph->ack)
3149                         return;
3150
3151                 listener = irdma_find_listener(cm_core,
3152                                                cm_info.loc_addr,
3153                                                cm_info.loc_port,
3154                                                cm_info.vlan_id,
3155                                                IRDMA_CM_LISTENER_ACTIVE_STATE);
3156                 if (!listener) {
3157                         cm_info.cm_id = NULL;
3158                         ibdev_dbg(&cm_core->iwdev->ibdev,
3159                                   "CM: no listener found\n");
3160                         return;
3161                 }
3162
3163                 cm_info.cm_id = listener->cm_id;
3164                 cm_node = irdma_make_cm_node(cm_core, iwdev, &cm_info,
3165                                              listener);
3166                 if (!cm_node) {
3167                         ibdev_dbg(&cm_core->iwdev->ibdev,
3168                                   "CM: allocate node failed\n");
3169                         refcount_dec(&listener->refcnt);
3170                         return;
3171                 }
3172
3173                 if (!tcph->rst && !tcph->fin) {
3174                         cm_node->state = IRDMA_CM_STATE_LISTENING;
3175                 } else {
3176                         irdma_rem_ref_cm_node(cm_node);
3177                         return;
3178                 }
3179
3180                 refcount_inc(&cm_node->refcnt);
3181         } else if (cm_node->state == IRDMA_CM_STATE_OFFLOADED) {
3182                 irdma_rem_ref_cm_node(cm_node);
3183                 return;
3184         }
3185
3186         irdma_process_pkt(cm_node, rbuf);
3187         irdma_rem_ref_cm_node(cm_node);
3188 }
3189
3190 static int irdma_add_qh(struct irdma_cm_node *cm_node, bool active)
3191 {
3192         if (!active)
3193                 irdma_add_conn_est_qh(cm_node);
3194         return 0;
3195 }
3196
3197 static void irdma_cm_free_ah_nop(struct irdma_cm_node *cm_node)
3198 {
3199 }
3200
3201 /**
3202  * irdma_setup_cm_core - setup top level instance of a cm core
3203  * @iwdev: iwarp device structure
3204  * @rdma_ver: HW version
3205  */
3206 int irdma_setup_cm_core(struct irdma_device *iwdev, u8 rdma_ver)
3207 {
3208         struct irdma_cm_core *cm_core = &iwdev->cm_core;
3209
3210         cm_core->iwdev = iwdev;
3211         cm_core->dev = &iwdev->rf->sc_dev;
3212
3213         /* Handles CM event work items send to Iwarp core */
3214         cm_core->event_wq = alloc_ordered_workqueue("iwarp-event-wq", 0);
3215         if (!cm_core->event_wq)
3216                 return -ENOMEM;
3217
3218         INIT_LIST_HEAD(&cm_core->listen_list);
3219
3220         timer_setup(&cm_core->tcp_timer, irdma_cm_timer_tick, 0);
3221
3222         spin_lock_init(&cm_core->ht_lock);
3223         spin_lock_init(&cm_core->listen_list_lock);
3224         spin_lock_init(&cm_core->apbvt_lock);
3225         switch (rdma_ver) {
3226         case IRDMA_GEN_1:
3227                 cm_core->form_cm_frame = irdma_form_uda_cm_frame;
3228                 cm_core->cm_create_ah = irdma_add_qh;
3229                 cm_core->cm_free_ah = irdma_cm_free_ah_nop;
3230                 break;
3231         case IRDMA_GEN_2:
3232         default:
3233                 cm_core->form_cm_frame = irdma_form_ah_cm_frame;
3234                 cm_core->cm_create_ah = irdma_cm_create_ah;
3235                 cm_core->cm_free_ah = irdma_cm_free_ah;
3236         }
3237
3238         return 0;
3239 }
3240
3241 /**
3242  * irdma_cleanup_cm_core - deallocate a top level instance of a
3243  * cm core
3244  * @cm_core: cm's core
3245  */
3246 void irdma_cleanup_cm_core(struct irdma_cm_core *cm_core)
3247 {
3248         if (!cm_core)
3249                 return;
3250
3251         del_timer_sync(&cm_core->tcp_timer);
3252
3253         destroy_workqueue(cm_core->event_wq);
3254         cm_core->dev->ws_reset(&cm_core->iwdev->vsi);
3255 }
3256
3257 /**
3258  * irdma_init_tcp_ctx - setup qp context
3259  * @cm_node: connection's node
3260  * @tcp_info: offload info for tcp
3261  * @iwqp: associate qp for the connection
3262  */
3263 static void irdma_init_tcp_ctx(struct irdma_cm_node *cm_node,
3264                                struct irdma_tcp_offload_info *tcp_info,
3265                                struct irdma_qp *iwqp)
3266 {
3267         tcp_info->ipv4 = cm_node->ipv4;
3268         tcp_info->drop_ooo_seg = !iwqp->iwdev->iw_ooo;
3269         tcp_info->wscale = true;
3270         tcp_info->ignore_tcp_opt = true;
3271         tcp_info->ignore_tcp_uns_opt = true;
3272         tcp_info->no_nagle = false;
3273
3274         tcp_info->ttl = IRDMA_DEFAULT_TTL;
3275         tcp_info->rtt_var = IRDMA_DEFAULT_RTT_VAR;
3276         tcp_info->ss_thresh = IRDMA_DEFAULT_SS_THRESH;
3277         tcp_info->rexmit_thresh = IRDMA_DEFAULT_REXMIT_THRESH;
3278
3279         tcp_info->tcp_state = IRDMA_TCP_STATE_ESTABLISHED;
3280         tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale;
3281         tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale;
3282
3283         tcp_info->snd_nxt = cm_node->tcp_cntxt.loc_seq_num;
3284         tcp_info->snd_wnd = cm_node->tcp_cntxt.snd_wnd;
3285         tcp_info->rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
3286         tcp_info->snd_max = cm_node->tcp_cntxt.loc_seq_num;
3287
3288         tcp_info->snd_una = cm_node->tcp_cntxt.loc_seq_num;
3289         tcp_info->cwnd = 2 * cm_node->tcp_cntxt.mss;
3290         tcp_info->snd_wl1 = cm_node->tcp_cntxt.rcv_nxt;
3291         tcp_info->snd_wl2 = cm_node->tcp_cntxt.loc_seq_num;
3292         tcp_info->max_snd_window = cm_node->tcp_cntxt.max_snd_wnd;
3293         tcp_info->rcv_wnd = cm_node->tcp_cntxt.rcv_wnd
3294                             << cm_node->tcp_cntxt.rcv_wscale;
3295
3296         tcp_info->flow_label = 0;
3297         tcp_info->snd_mss = (u32)cm_node->tcp_cntxt.mss;
3298         tcp_info->tos = cm_node->tos;
3299         if (cm_node->vlan_id < VLAN_N_VID) {
3300                 tcp_info->insert_vlan_tag = true;
3301                 tcp_info->vlan_tag = cm_node->vlan_id;
3302                 tcp_info->vlan_tag |= cm_node->user_pri << VLAN_PRIO_SHIFT;
3303         }
3304         if (cm_node->ipv4) {
3305                 tcp_info->src_port = cm_node->loc_port;
3306                 tcp_info->dst_port = cm_node->rem_port;
3307
3308                 tcp_info->dest_ip_addr[3] = cm_node->rem_addr[0];
3309                 tcp_info->local_ipaddr[3] = cm_node->loc_addr[0];
3310                 tcp_info->arp_idx = (u16)irdma_arp_table(iwqp->iwdev->rf,
3311                                                          &tcp_info->dest_ip_addr[3],
3312                                                          true, NULL,
3313                                                          IRDMA_ARP_RESOLVE);
3314         } else {
3315                 tcp_info->src_port = cm_node->loc_port;
3316                 tcp_info->dst_port = cm_node->rem_port;
3317                 memcpy(tcp_info->dest_ip_addr, cm_node->rem_addr,
3318                        sizeof(tcp_info->dest_ip_addr));
3319                 memcpy(tcp_info->local_ipaddr, cm_node->loc_addr,
3320                        sizeof(tcp_info->local_ipaddr));
3321
3322                 tcp_info->arp_idx = (u16)irdma_arp_table(iwqp->iwdev->rf,
3323                                                          &tcp_info->dest_ip_addr[0],
3324                                                          false, NULL,
3325                                                          IRDMA_ARP_RESOLVE);
3326         }
3327 }
3328
3329 /**
3330  * irdma_cm_init_tsa_conn - setup qp for RTS
3331  * @iwqp: associate qp for the connection
3332  * @cm_node: connection's node
3333  */
3334 static void irdma_cm_init_tsa_conn(struct irdma_qp *iwqp,
3335                                    struct irdma_cm_node *cm_node)
3336 {
3337         struct irdma_iwarp_offload_info *iwarp_info;
3338         struct irdma_qp_host_ctx_info *ctx_info;
3339
3340         iwarp_info = &iwqp->iwarp_info;
3341         ctx_info = &iwqp->ctx_info;
3342
3343         ctx_info->tcp_info = &iwqp->tcp_info;
3344         ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id;
3345         ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id;
3346
3347         iwarp_info->ord_size = cm_node->ord_size;
3348         iwarp_info->ird_size = cm_node->ird_size;
3349         iwarp_info->rd_en = true;
3350         iwarp_info->rdmap_ver = 1;
3351         iwarp_info->ddp_ver = 1;
3352         iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id;
3353
3354         ctx_info->tcp_info_valid = true;
3355         ctx_info->iwarp_info_valid = true;
3356         ctx_info->user_pri = cm_node->user_pri;
3357
3358         irdma_init_tcp_ctx(cm_node, &iwqp->tcp_info, iwqp);
3359         if (cm_node->snd_mark_en) {
3360                 iwarp_info->snd_mark_en = true;
3361                 iwarp_info->snd_mark_offset = (iwqp->tcp_info.snd_nxt & SNDMARKER_SEQNMASK) +
3362                                                cm_node->lsmm_size;
3363         }
3364
3365         cm_node->state = IRDMA_CM_STATE_OFFLOADED;
3366         iwqp->tcp_info.tcp_state = IRDMA_TCP_STATE_ESTABLISHED;
3367         iwqp->tcp_info.src_mac_addr_idx = iwqp->iwdev->mac_ip_table_idx;
3368
3369         if (cm_node->rcv_mark_en) {
3370                 iwarp_info->rcv_mark_en = true;
3371                 iwarp_info->align_hdrs = true;
3372         }
3373
3374         irdma_sc_qp_setctx(&iwqp->sc_qp, iwqp->host_ctx.va, ctx_info);
3375
3376         /* once tcp_info is set, no need to do it again */
3377         ctx_info->tcp_info_valid = false;
3378         ctx_info->iwarp_info_valid = false;
3379 }
3380
3381 /**
3382  * irdma_cm_disconn - when a connection is being closed
3383  * @iwqp: associated qp for the connection
3384  */
3385 void irdma_cm_disconn(struct irdma_qp *iwqp)
3386 {
3387         struct irdma_device *iwdev = iwqp->iwdev;
3388         struct disconn_work *work;
3389         unsigned long flags;
3390
3391         work = kzalloc(sizeof(*work), GFP_ATOMIC);
3392         if (!work)
3393                 return;
3394
3395         spin_lock_irqsave(&iwdev->rf->qptable_lock, flags);
3396         if (!iwdev->rf->qp_table[iwqp->ibqp.qp_num]) {
3397                 spin_unlock_irqrestore(&iwdev->rf->qptable_lock, flags);
3398                 ibdev_dbg(&iwdev->ibdev,
3399                           "CM: qp_id %d is already freed\n",
3400                           iwqp->ibqp.qp_num);
3401                 kfree(work);
3402                 return;
3403         }
3404         irdma_qp_add_ref(&iwqp->ibqp);
3405         spin_unlock_irqrestore(&iwdev->rf->qptable_lock, flags);
3406
3407         work->iwqp = iwqp;
3408         INIT_WORK(&work->work, irdma_disconnect_worker);
3409         queue_work(iwdev->cleanup_wq, &work->work);
3410 }
3411
3412 /**
3413  * irdma_qp_disconnect - free qp and close cm
3414  * @iwqp: associate qp for the connection
3415  */
3416 static void irdma_qp_disconnect(struct irdma_qp *iwqp)
3417 {
3418         struct irdma_device *iwdev = iwqp->iwdev;
3419
3420         iwqp->active_conn = 0;
3421         /* close the CM node down if it is still active */
3422         ibdev_dbg(&iwdev->ibdev, "CM: Call close API\n");
3423         irdma_cm_close(iwqp->cm_node);
3424 }
3425
3426 /**
3427  * irdma_cm_disconn_true - called by worker thread to disconnect qp
3428  * @iwqp: associate qp for the connection
3429  */
3430 static void irdma_cm_disconn_true(struct irdma_qp *iwqp)
3431 {
3432         struct iw_cm_id *cm_id;
3433         struct irdma_device *iwdev;
3434         struct irdma_sc_qp *qp = &iwqp->sc_qp;
3435         u16 last_ae;
3436         u8 original_hw_tcp_state;
3437         u8 original_ibqp_state;
3438         int disconn_status = 0;
3439         int issue_disconn = 0;
3440         int issue_close = 0;
3441         int issue_flush = 0;
3442         unsigned long flags;
3443         int err;
3444
3445         iwdev = iwqp->iwdev;
3446         spin_lock_irqsave(&iwqp->lock, flags);
3447         if (rdma_protocol_roce(&iwdev->ibdev, 1)) {
3448                 struct ib_qp_attr attr;
3449
3450                 if (iwqp->flush_issued || iwqp->sc_qp.qp_uk.destroy_pending) {
3451                         spin_unlock_irqrestore(&iwqp->lock, flags);
3452                         return;
3453                 }
3454
3455                 spin_unlock_irqrestore(&iwqp->lock, flags);
3456
3457                 attr.qp_state = IB_QPS_ERR;
3458                 irdma_modify_qp_roce(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
3459                 irdma_ib_qp_event(iwqp, qp->event_type);
3460                 return;
3461         }
3462
3463         cm_id = iwqp->cm_id;
3464         original_hw_tcp_state = iwqp->hw_tcp_state;
3465         original_ibqp_state = iwqp->ibqp_state;
3466         last_ae = iwqp->last_aeq;
3467
3468         if (qp->term_flags) {
3469                 issue_disconn = 1;
3470                 issue_close = 1;
3471                 iwqp->cm_id = NULL;
3472                 irdma_terminate_del_timer(qp);
3473                 if (!iwqp->flush_issued) {
3474                         iwqp->flush_issued = 1;
3475                         issue_flush = 1;
3476                 }
3477         } else if ((original_hw_tcp_state == IRDMA_TCP_STATE_CLOSE_WAIT) ||
3478                    ((original_ibqp_state == IB_QPS_RTS) &&
3479                     (last_ae == IRDMA_AE_LLP_CONNECTION_RESET))) {
3480                 issue_disconn = 1;
3481                 if (last_ae == IRDMA_AE_LLP_CONNECTION_RESET)
3482                         disconn_status = -ECONNRESET;
3483         }
3484
3485         if (original_hw_tcp_state == IRDMA_TCP_STATE_CLOSED ||
3486             original_hw_tcp_state == IRDMA_TCP_STATE_TIME_WAIT ||
3487             last_ae == IRDMA_AE_RDMAP_ROE_BAD_LLP_CLOSE ||
3488             last_ae == IRDMA_AE_BAD_CLOSE ||
3489             last_ae == IRDMA_AE_LLP_CONNECTION_RESET || iwdev->rf->reset || !cm_id) {
3490                 issue_close = 1;
3491                 iwqp->cm_id = NULL;
3492                 qp->term_flags = 0;
3493                 if (!iwqp->flush_issued) {
3494                         iwqp->flush_issued = 1;
3495                         issue_flush = 1;
3496                 }
3497         }
3498
3499         spin_unlock_irqrestore(&iwqp->lock, flags);
3500         if (issue_flush && !iwqp->sc_qp.qp_uk.destroy_pending) {
3501                 irdma_flush_wqes(iwqp, IRDMA_FLUSH_SQ | IRDMA_FLUSH_RQ |
3502                                  IRDMA_FLUSH_WAIT);
3503
3504                 if (qp->term_flags)
3505                         irdma_ib_qp_event(iwqp, qp->event_type);
3506         }
3507
3508         if (!cm_id || !cm_id->event_handler)
3509                 return;
3510
3511         spin_lock_irqsave(&iwdev->cm_core.ht_lock, flags);
3512         if (!iwqp->cm_node) {
3513                 spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags);
3514                 return;
3515         }
3516         refcount_inc(&iwqp->cm_node->refcnt);
3517
3518         spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags);
3519
3520         if (issue_disconn) {
3521                 err = irdma_send_cm_event(iwqp->cm_node, cm_id,
3522                                           IW_CM_EVENT_DISCONNECT,
3523                                           disconn_status);
3524                 if (err)
3525                         ibdev_dbg(&iwdev->ibdev,
3526                                   "CM: disconnect event failed: - cm_id = %p\n",
3527                                   cm_id);
3528         }
3529         if (issue_close) {
3530                 cm_id->provider_data = iwqp;
3531                 err = irdma_send_cm_event(iwqp->cm_node, cm_id,
3532                                           IW_CM_EVENT_CLOSE, 0);
3533                 if (err)
3534                         ibdev_dbg(&iwdev->ibdev,
3535                                   "CM: close event failed: - cm_id = %p\n",
3536                                   cm_id);
3537                 irdma_qp_disconnect(iwqp);
3538         }
3539         irdma_rem_ref_cm_node(iwqp->cm_node);
3540 }
3541
3542 /**
3543  * irdma_disconnect_worker - worker for connection close
3544  * @work: points or disconn structure
3545  */
3546 static void irdma_disconnect_worker(struct work_struct *work)
3547 {
3548         struct disconn_work *dwork = container_of(work, struct disconn_work, work);
3549         struct irdma_qp *iwqp = dwork->iwqp;
3550
3551         kfree(dwork);
3552         irdma_cm_disconn_true(iwqp);
3553         irdma_qp_rem_ref(&iwqp->ibqp);
3554 }
3555
3556 /**
3557  * irdma_free_lsmm_rsrc - free lsmm memory and deregister
3558  * @iwqp: associate qp for the connection
3559  */
3560 void irdma_free_lsmm_rsrc(struct irdma_qp *iwqp)
3561 {
3562         struct irdma_device *iwdev;
3563
3564         iwdev = iwqp->iwdev;
3565
3566         if (iwqp->ietf_mem.va) {
3567                 if (iwqp->lsmm_mr)
3568                         iwdev->ibdev.ops.dereg_mr(iwqp->lsmm_mr, NULL);
3569                 dma_free_coherent(iwdev->rf->sc_dev.hw->device,
3570                                   iwqp->ietf_mem.size, iwqp->ietf_mem.va,
3571                                   iwqp->ietf_mem.pa);
3572                 iwqp->ietf_mem.va = NULL;
3573                 iwqp->ietf_mem.va = NULL;
3574         }
3575 }
3576
3577 /**
3578  * irdma_accept - registered call for connection to be accepted
3579  * @cm_id: cm information for passive connection
3580  * @conn_param: accpet parameters
3581  */
3582 int irdma_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3583 {
3584         struct ib_qp *ibqp;
3585         struct irdma_qp *iwqp;
3586         struct irdma_device *iwdev;
3587         struct irdma_sc_dev *dev;
3588         struct irdma_cm_node *cm_node;
3589         struct ib_qp_attr attr = {};
3590         int passive_state;
3591         struct ib_mr *ibmr;
3592         struct irdma_pd *iwpd;
3593         u16 buf_len = 0;
3594         struct irdma_kmem_info accept;
3595         u64 tagged_offset;
3596         int wait_ret;
3597         int ret = 0;
3598
3599         ibqp = irdma_get_qp(cm_id->device, conn_param->qpn);
3600         if (!ibqp)
3601                 return -EINVAL;
3602
3603         iwqp = to_iwqp(ibqp);
3604         iwdev = iwqp->iwdev;
3605         dev = &iwdev->rf->sc_dev;
3606         cm_node = cm_id->provider_data;
3607
3608         if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) {
3609                 cm_node->ipv4 = true;
3610                 cm_node->vlan_id = irdma_get_vlan_ipv4(cm_node->loc_addr);
3611         } else {
3612                 cm_node->ipv4 = false;
3613                 irdma_netdev_vlan_ipv6(cm_node->loc_addr, &cm_node->vlan_id,
3614                                        NULL);
3615         }
3616         ibdev_dbg(&iwdev->ibdev, "CM: Accept vlan_id=%d\n",
3617                   cm_node->vlan_id);
3618
3619         trace_irdma_accept(cm_node, 0, NULL);
3620
3621         if (cm_node->state == IRDMA_CM_STATE_LISTENER_DESTROYED) {
3622                 ret = -EINVAL;
3623                 goto error;
3624         }
3625
3626         passive_state = atomic_add_return(1, &cm_node->passive_state);
3627         if (passive_state == IRDMA_SEND_RESET_EVENT) {
3628                 ret = -ECONNRESET;
3629                 goto error;
3630         }
3631
3632         buf_len = conn_param->private_data_len + IRDMA_MAX_IETF_SIZE;
3633         iwqp->ietf_mem.size = ALIGN(buf_len, 1);
3634         iwqp->ietf_mem.va = dma_alloc_coherent(dev->hw->device,
3635                                                iwqp->ietf_mem.size,
3636                                                &iwqp->ietf_mem.pa, GFP_KERNEL);
3637         if (!iwqp->ietf_mem.va) {
3638                 ret = -ENOMEM;
3639                 goto error;
3640         }
3641
3642         cm_node->pdata.size = conn_param->private_data_len;
3643         accept.addr = iwqp->ietf_mem.va;
3644         accept.size = irdma_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY);
3645         memcpy((u8 *)accept.addr + accept.size, conn_param->private_data,
3646                conn_param->private_data_len);
3647
3648         if (cm_node->dev->ws_add(iwqp->sc_qp.vsi, cm_node->user_pri)) {
3649                 ret = -ENOMEM;
3650                 goto error;
3651         }
3652         iwqp->sc_qp.user_pri = cm_node->user_pri;
3653         irdma_qp_add_qos(&iwqp->sc_qp);
3654         /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3655         iwpd = iwqp->iwpd;
3656         tagged_offset = (uintptr_t)iwqp->ietf_mem.va;
3657         ibmr = irdma_reg_phys_mr(&iwpd->ibpd, iwqp->ietf_mem.pa, buf_len,
3658                                  IB_ACCESS_LOCAL_WRITE, &tagged_offset);
3659         if (IS_ERR(ibmr)) {
3660                 ret = -ENOMEM;
3661                 goto error;
3662         }
3663
3664         ibmr->pd = &iwpd->ibpd;
3665         ibmr->device = iwpd->ibpd.device;
3666         iwqp->lsmm_mr = ibmr;
3667         if (iwqp->page)
3668                 iwqp->sc_qp.qp_uk.sq_base = kmap_local_page(iwqp->page);
3669
3670         cm_node->lsmm_size = accept.size + conn_param->private_data_len;
3671         irdma_sc_send_lsmm(&iwqp->sc_qp, iwqp->ietf_mem.va, cm_node->lsmm_size,
3672                            ibmr->lkey);
3673
3674         if (iwqp->page)
3675                 kunmap_local(iwqp->sc_qp.qp_uk.sq_base);
3676
3677         iwqp->cm_id = cm_id;
3678         cm_node->cm_id = cm_id;
3679
3680         cm_id->provider_data = iwqp;
3681         iwqp->active_conn = 0;
3682         iwqp->cm_node = cm_node;
3683         cm_node->iwqp = iwqp;
3684         irdma_cm_init_tsa_conn(iwqp, cm_node);
3685         irdma_qp_add_ref(&iwqp->ibqp);
3686         cm_id->add_ref(cm_id);
3687
3688         attr.qp_state = IB_QPS_RTS;
3689         cm_node->qhash_set = false;
3690         cm_node->cm_core->cm_free_ah(cm_node);
3691
3692         irdma_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
3693         if (dev->hw_attrs.uk_attrs.feature_flags & IRDMA_FEATURE_RTS_AE) {
3694                 wait_ret = wait_event_interruptible_timeout(iwqp->waitq,
3695                                                             iwqp->rts_ae_rcvd,
3696                                                             IRDMA_MAX_TIMEOUT);
3697                 if (!wait_ret) {
3698                         ibdev_dbg(&iwdev->ibdev,
3699                                   "CM: Slow Connection: cm_node=%p, loc_port=%d, rem_port=%d, cm_id=%p\n",
3700                                   cm_node, cm_node->loc_port,
3701                                   cm_node->rem_port, cm_node->cm_id);
3702                         ret = -ECONNRESET;
3703                         goto error;
3704                 }
3705         }
3706
3707         irdma_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0);
3708         cm_node->accelerated = true;
3709         complete(&cm_node->establish_comp);
3710
3711         if (cm_node->accept_pend) {
3712                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
3713                 cm_node->accept_pend = 0;
3714         }
3715
3716         ibdev_dbg(&iwdev->ibdev,
3717                   "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",
3718                   cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr,
3719                   cm_node->loc_addr, cm_node, cm_id, ibqp->qp_num);
3720         cm_node->cm_core->stats_accepts++;
3721
3722         return 0;
3723 error:
3724         irdma_free_lsmm_rsrc(iwqp);
3725         irdma_rem_ref_cm_node(cm_node);
3726
3727         return ret;
3728 }
3729
3730 /**
3731  * irdma_reject - registered call for connection to be rejected
3732  * @cm_id: cm information for passive connection
3733  * @pdata: private data to be sent
3734  * @pdata_len: private data length
3735  */
3736 int irdma_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3737 {
3738         struct irdma_device *iwdev;
3739         struct irdma_cm_node *cm_node;
3740
3741         cm_node = cm_id->provider_data;
3742         cm_node->pdata.size = pdata_len;
3743
3744         trace_irdma_reject(cm_node, 0, NULL);
3745
3746         iwdev = to_iwdev(cm_id->device);
3747         if (!iwdev)
3748                 return -EINVAL;
3749
3750         cm_node->cm_core->stats_rejects++;
3751
3752         if (pdata_len + sizeof(struct ietf_mpa_v2) > IRDMA_MAX_CM_BUF)
3753                 return -EINVAL;
3754
3755         return irdma_cm_reject(cm_node, pdata, pdata_len);
3756 }
3757
3758 /**
3759  * irdma_connect - registered call for connection to be established
3760  * @cm_id: cm information for passive connection
3761  * @conn_param: Information about the connection
3762  */
3763 int irdma_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3764 {
3765         struct ib_qp *ibqp;
3766         struct irdma_qp *iwqp;
3767         struct irdma_device *iwdev;
3768         struct irdma_cm_node *cm_node;
3769         struct irdma_cm_info cm_info;
3770         struct sockaddr_in *laddr;
3771         struct sockaddr_in *raddr;
3772         struct sockaddr_in6 *laddr6;
3773         struct sockaddr_in6 *raddr6;
3774         int ret = 0;
3775
3776         ibqp = irdma_get_qp(cm_id->device, conn_param->qpn);
3777         if (!ibqp)
3778                 return -EINVAL;
3779         iwqp = to_iwqp(ibqp);
3780         if (!iwqp)
3781                 return -EINVAL;
3782         iwdev = iwqp->iwdev;
3783         if (!iwdev)
3784                 return -EINVAL;
3785
3786         laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3787         raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
3788         laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3789         raddr6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr;
3790
3791         if (!(laddr->sin_port) || !(raddr->sin_port))
3792                 return -EINVAL;
3793
3794         iwqp->active_conn = 1;
3795         iwqp->cm_id = NULL;
3796         cm_id->provider_data = iwqp;
3797
3798         /* set up the connection params for the node */
3799         if (cm_id->remote_addr.ss_family == AF_INET) {
3800                 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV4)
3801                         return -EINVAL;
3802
3803                 cm_info.ipv4 = true;
3804                 memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr));
3805                 memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr));
3806                 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3807                 cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr);
3808                 cm_info.loc_port = ntohs(laddr->sin_port);
3809                 cm_info.rem_port = ntohs(raddr->sin_port);
3810                 cm_info.vlan_id = irdma_get_vlan_ipv4(cm_info.loc_addr);
3811         } else {
3812                 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV6)
3813                         return -EINVAL;
3814
3815                 cm_info.ipv4 = false;
3816                 irdma_copy_ip_ntohl(cm_info.loc_addr,
3817                                     laddr6->sin6_addr.in6_u.u6_addr32);
3818                 irdma_copy_ip_ntohl(cm_info.rem_addr,
3819                                     raddr6->sin6_addr.in6_u.u6_addr32);
3820                 cm_info.loc_port = ntohs(laddr6->sin6_port);
3821                 cm_info.rem_port = ntohs(raddr6->sin6_port);
3822                 irdma_netdev_vlan_ipv6(cm_info.loc_addr, &cm_info.vlan_id,
3823                                        NULL);
3824         }
3825         cm_info.cm_id = cm_id;
3826         cm_info.qh_qpid = iwdev->vsi.ilq->qp_id;
3827         cm_info.tos = cm_id->tos;
3828         if (iwdev->vsi.dscp_mode)
3829                 cm_info.user_pri =
3830                         iwqp->sc_qp.vsi->dscp_map[irdma_tos2dscp(cm_info.tos)];
3831         else
3832                 cm_info.user_pri = rt_tos2priority(cm_id->tos);
3833
3834         if (iwqp->sc_qp.dev->ws_add(iwqp->sc_qp.vsi, cm_info.user_pri))
3835                 return -ENOMEM;
3836         iwqp->sc_qp.user_pri = cm_info.user_pri;
3837         irdma_qp_add_qos(&iwqp->sc_qp);
3838         ibdev_dbg(&iwdev->ibdev, "DCB: TOS:[%d] UP:[%d]\n", cm_id->tos,
3839                   cm_info.user_pri);
3840
3841         trace_irdma_dcb_tos(iwdev, cm_id->tos, cm_info.user_pri);
3842
3843         ret = irdma_create_cm_node(&iwdev->cm_core, iwdev, conn_param, &cm_info,
3844                                    &cm_node);
3845         if (ret)
3846                 return ret;
3847         ret = cm_node->cm_core->cm_create_ah(cm_node, true);
3848         if (ret)
3849                 goto err;
3850         if (irdma_manage_qhash(iwdev, &cm_info,
3851                                IRDMA_QHASH_TYPE_TCP_ESTABLISHED,
3852                                IRDMA_QHASH_MANAGE_TYPE_ADD, NULL, true)) {
3853                 ret = -EINVAL;
3854                 goto err;
3855         }
3856         cm_node->qhash_set = true;
3857
3858         cm_node->apbvt_entry = irdma_add_apbvt(iwdev, cm_info.loc_port);
3859         if (!cm_node->apbvt_entry) {
3860                 ret = -EINVAL;
3861                 goto err;
3862         }
3863
3864         cm_node->apbvt_set = true;
3865         iwqp->cm_node = cm_node;
3866         cm_node->iwqp = iwqp;
3867         iwqp->cm_id = cm_id;
3868         irdma_qp_add_ref(&iwqp->ibqp);
3869         cm_id->add_ref(cm_id);
3870
3871         if (cm_node->state != IRDMA_CM_STATE_OFFLOADED) {
3872                 cm_node->state = IRDMA_CM_STATE_SYN_SENT;
3873                 ret = irdma_send_syn(cm_node, 0);
3874                 if (ret)
3875                         goto err;
3876         }
3877
3878         ibdev_dbg(&iwdev->ibdev,
3879                   "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",
3880                   cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr,
3881                   cm_node->loc_addr, cm_node, cm_id, ibqp->qp_num);
3882
3883         trace_irdma_connect(cm_node, 0, NULL);
3884
3885         return 0;
3886
3887 err:
3888         if (cm_info.ipv4)
3889                 ibdev_dbg(&iwdev->ibdev,
3890                           "CM: connect() FAILED: dest addr=%pI4",
3891                           cm_info.rem_addr);
3892         else
3893                 ibdev_dbg(&iwdev->ibdev,
3894                           "CM: connect() FAILED: dest addr=%pI6",
3895                           cm_info.rem_addr);
3896         irdma_rem_ref_cm_node(cm_node);
3897         iwdev->cm_core.stats_connect_errs++;
3898
3899         return ret;
3900 }
3901
3902 /**
3903  * irdma_create_listen - registered call creating listener
3904  * @cm_id: cm information for passive connection
3905  * @backlog: to max accept pending count
3906  */
3907 int irdma_create_listen(struct iw_cm_id *cm_id, int backlog)
3908 {
3909         struct irdma_device *iwdev;
3910         struct irdma_cm_listener *cm_listen_node;
3911         struct irdma_cm_info cm_info = {};
3912         struct sockaddr_in *laddr;
3913         struct sockaddr_in6 *laddr6;
3914         bool wildcard = false;
3915         int err;
3916
3917         iwdev = to_iwdev(cm_id->device);
3918         if (!iwdev)
3919                 return -EINVAL;
3920
3921         laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3922         laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3923         cm_info.qh_qpid = iwdev->vsi.ilq->qp_id;
3924
3925         if (laddr->sin_family == AF_INET) {
3926                 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV4)
3927                         return -EINVAL;
3928
3929                 cm_info.ipv4 = true;
3930                 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3931                 cm_info.loc_port = ntohs(laddr->sin_port);
3932
3933                 if (laddr->sin_addr.s_addr != htonl(INADDR_ANY)) {
3934                         cm_info.vlan_id = irdma_get_vlan_ipv4(cm_info.loc_addr);
3935                 } else {
3936                         cm_info.vlan_id = 0xFFFF;
3937                         wildcard = true;
3938                 }
3939         } else {
3940                 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV6)
3941                         return -EINVAL;
3942
3943                 cm_info.ipv4 = false;
3944                 irdma_copy_ip_ntohl(cm_info.loc_addr,
3945                                     laddr6->sin6_addr.in6_u.u6_addr32);
3946                 cm_info.loc_port = ntohs(laddr6->sin6_port);
3947                 if (ipv6_addr_type(&laddr6->sin6_addr) != IPV6_ADDR_ANY) {
3948                         irdma_netdev_vlan_ipv6(cm_info.loc_addr,
3949                                                &cm_info.vlan_id, NULL);
3950                 } else {
3951                         cm_info.vlan_id = 0xFFFF;
3952                         wildcard = true;
3953                 }
3954         }
3955
3956         if (cm_info.vlan_id >= VLAN_N_VID && iwdev->dcb_vlan_mode)
3957                 cm_info.vlan_id = 0;
3958         cm_info.backlog = backlog;
3959         cm_info.cm_id = cm_id;
3960
3961         trace_irdma_create_listen(iwdev, &cm_info);
3962
3963         cm_listen_node = irdma_make_listen_node(&iwdev->cm_core, iwdev,
3964                                                 &cm_info);
3965         if (!cm_listen_node) {
3966                 ibdev_dbg(&iwdev->ibdev,
3967                           "CM: cm_listen_node == NULL\n");
3968                 return -ENOMEM;
3969         }
3970
3971         cm_id->provider_data = cm_listen_node;
3972
3973         cm_listen_node->tos = cm_id->tos;
3974         if (iwdev->vsi.dscp_mode)
3975                 cm_listen_node->user_pri =
3976                         iwdev->vsi.dscp_map[irdma_tos2dscp(cm_id->tos)];
3977         else
3978                 cm_listen_node->user_pri = rt_tos2priority(cm_id->tos);
3979         cm_info.user_pri = cm_listen_node->user_pri;
3980         if (!cm_listen_node->reused_node) {
3981                 if (wildcard) {
3982                         err = irdma_add_mqh(iwdev, &cm_info, cm_listen_node);
3983                         if (err)
3984                                 goto error;
3985                 } else {
3986                         err = irdma_manage_qhash(iwdev, &cm_info,
3987                                                  IRDMA_QHASH_TYPE_TCP_SYN,
3988                                                  IRDMA_QHASH_MANAGE_TYPE_ADD,
3989                                                  NULL, true);
3990                         if (err)
3991                                 goto error;
3992
3993                         cm_listen_node->qhash_set = true;
3994                 }
3995
3996                 cm_listen_node->apbvt_entry = irdma_add_apbvt(iwdev,
3997                                                               cm_info.loc_port);
3998                 if (!cm_listen_node->apbvt_entry)
3999                         goto error;
4000         }
4001         cm_id->add_ref(cm_id);
4002         cm_listen_node->cm_core->stats_listen_created++;
4003         ibdev_dbg(&iwdev->ibdev,
4004                   "CM: loc_port=0x%04x loc_addr=%pI4 cm_listen_node=%p cm_id=%p qhash_set=%d vlan_id=%d\n",
4005                   cm_listen_node->loc_port, cm_listen_node->loc_addr,
4006                   cm_listen_node, cm_listen_node->cm_id,
4007                   cm_listen_node->qhash_set, cm_listen_node->vlan_id);
4008
4009         return 0;
4010
4011 error:
4012
4013         irdma_cm_del_listen(&iwdev->cm_core, cm_listen_node, false);
4014
4015         return -EINVAL;
4016 }
4017
4018 /**
4019  * irdma_destroy_listen - registered call to destroy listener
4020  * @cm_id: cm information for passive connection
4021  */
4022 int irdma_destroy_listen(struct iw_cm_id *cm_id)
4023 {
4024         struct irdma_device *iwdev;
4025
4026         iwdev = to_iwdev(cm_id->device);
4027         if (cm_id->provider_data)
4028                 irdma_cm_del_listen(&iwdev->cm_core, cm_id->provider_data,
4029                                     true);
4030         else
4031                 ibdev_dbg(&iwdev->ibdev,
4032                           "CM: cm_id->provider_data was NULL\n");
4033
4034         cm_id->rem_ref(cm_id);
4035
4036         return 0;
4037 }
4038
4039 /**
4040  * irdma_teardown_list_prep - add conn nodes slated for tear down to list
4041  * @cm_core: cm's core
4042  * @teardown_list: a list to which cm_node will be selected
4043  * @ipaddr: pointer to ip address
4044  * @nfo: pointer to cm_info structure instance
4045  * @disconnect_all: flag indicating disconnect all QPs
4046  */
4047 static void irdma_teardown_list_prep(struct irdma_cm_core *cm_core,
4048                                      struct list_head *teardown_list,
4049                                      u32 *ipaddr,
4050                                      struct irdma_cm_info *nfo,
4051                                      bool disconnect_all)
4052 {
4053         struct irdma_cm_node *cm_node;
4054         int bkt;
4055
4056         hash_for_each_rcu(cm_core->cm_hash_tbl, bkt, cm_node, list) {
4057                 if ((disconnect_all ||
4058                      (nfo->vlan_id == cm_node->vlan_id &&
4059                       !memcmp(cm_node->loc_addr, ipaddr, nfo->ipv4 ? 4 : 16))) &&
4060                     refcount_inc_not_zero(&cm_node->refcnt))
4061                         list_add(&cm_node->teardown_entry, teardown_list);
4062         }
4063 }
4064
4065 /**
4066  * irdma_cm_event_connected - handle connected active node
4067  * @event: the info for cm_node of connection
4068  */
4069 static void irdma_cm_event_connected(struct irdma_cm_event *event)
4070 {
4071         struct irdma_qp *iwqp;
4072         struct irdma_device *iwdev;
4073         struct irdma_cm_node *cm_node;
4074         struct irdma_sc_dev *dev;
4075         struct ib_qp_attr attr = {};
4076         struct iw_cm_id *cm_id;
4077         int status;
4078         bool read0;
4079         int wait_ret = 0;
4080
4081         cm_node = event->cm_node;
4082         cm_id = cm_node->cm_id;
4083         iwqp = cm_id->provider_data;
4084         iwdev = iwqp->iwdev;
4085         dev = &iwdev->rf->sc_dev;
4086         if (iwqp->sc_qp.qp_uk.destroy_pending) {
4087                 status = -ETIMEDOUT;
4088                 goto error;
4089         }
4090
4091         irdma_cm_init_tsa_conn(iwqp, cm_node);
4092         read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO);
4093         if (iwqp->page)
4094                 iwqp->sc_qp.qp_uk.sq_base = kmap_local_page(iwqp->page);
4095         irdma_sc_send_rtt(&iwqp->sc_qp, read0);
4096         if (iwqp->page)
4097                 kunmap_local(iwqp->sc_qp.qp_uk.sq_base);
4098
4099         attr.qp_state = IB_QPS_RTS;
4100         cm_node->qhash_set = false;
4101         irdma_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
4102         if (dev->hw_attrs.uk_attrs.feature_flags & IRDMA_FEATURE_RTS_AE) {
4103                 wait_ret = wait_event_interruptible_timeout(iwqp->waitq,
4104                                                             iwqp->rts_ae_rcvd,
4105                                                             IRDMA_MAX_TIMEOUT);
4106                 if (!wait_ret)
4107                         ibdev_dbg(&iwdev->ibdev,
4108                                   "CM: Slow Connection: cm_node=%p, loc_port=%d, rem_port=%d, cm_id=%p\n",
4109                                   cm_node, cm_node->loc_port,
4110                                   cm_node->rem_port, cm_node->cm_id);
4111         }
4112
4113         irdma_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 0);
4114         cm_node->accelerated = true;
4115         complete(&cm_node->establish_comp);
4116         cm_node->cm_core->cm_free_ah(cm_node);
4117         return;
4118
4119 error:
4120         iwqp->cm_id = NULL;
4121         cm_id->provider_data = NULL;
4122         irdma_send_cm_event(event->cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY,
4123                             status);
4124         irdma_rem_ref_cm_node(event->cm_node);
4125 }
4126
4127 /**
4128  * irdma_cm_event_reset - handle reset
4129  * @event: the info for cm_node of connection
4130  */
4131 static void irdma_cm_event_reset(struct irdma_cm_event *event)
4132 {
4133         struct irdma_cm_node *cm_node = event->cm_node;
4134         struct iw_cm_id *cm_id = cm_node->cm_id;
4135         struct irdma_qp *iwqp;
4136
4137         if (!cm_id)
4138                 return;
4139
4140         iwqp = cm_id->provider_data;
4141         if (!iwqp)
4142                 return;
4143
4144         ibdev_dbg(&cm_node->iwdev->ibdev,
4145                   "CM: reset event %p - cm_id = %p\n", event->cm_node, cm_id);
4146         iwqp->cm_id = NULL;
4147
4148         irdma_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT,
4149                             -ECONNRESET);
4150         irdma_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0);
4151 }
4152
4153 /**
4154  * irdma_cm_event_handler - send event to cm upper layer
4155  * @work: pointer of cm event info.
4156  */
4157 static void irdma_cm_event_handler(struct work_struct *work)
4158 {
4159         struct irdma_cm_event *event = container_of(work, struct irdma_cm_event, event_work);
4160         struct irdma_cm_node *cm_node;
4161
4162         if (!event || !event->cm_node || !event->cm_node->cm_core)
4163                 return;
4164
4165         cm_node = event->cm_node;
4166         trace_irdma_cm_event_handler(cm_node, event->type, NULL);
4167
4168         switch (event->type) {
4169         case IRDMA_CM_EVENT_MPA_REQ:
4170                 irdma_send_cm_event(cm_node, cm_node->cm_id,
4171                                     IW_CM_EVENT_CONNECT_REQUEST, 0);
4172                 break;
4173         case IRDMA_CM_EVENT_RESET:
4174                 irdma_cm_event_reset(event);
4175                 break;
4176         case IRDMA_CM_EVENT_CONNECTED:
4177                 if (!event->cm_node->cm_id ||
4178                     event->cm_node->state != IRDMA_CM_STATE_OFFLOADED)
4179                         break;
4180                 irdma_cm_event_connected(event);
4181                 break;
4182         case IRDMA_CM_EVENT_MPA_REJECT:
4183                 if (!event->cm_node->cm_id ||
4184                     cm_node->state == IRDMA_CM_STATE_OFFLOADED)
4185                         break;
4186                 irdma_send_cm_event(cm_node, cm_node->cm_id,
4187                                     IW_CM_EVENT_CONNECT_REPLY, -ECONNREFUSED);
4188                 break;
4189         case IRDMA_CM_EVENT_ABORTED:
4190                 if (!event->cm_node->cm_id ||
4191                     event->cm_node->state == IRDMA_CM_STATE_OFFLOADED)
4192                         break;
4193                 irdma_event_connect_error(event);
4194                 break;
4195         default:
4196                 ibdev_dbg(&cm_node->iwdev->ibdev,
4197                           "CM: bad event type = %d\n", event->type);
4198                 break;
4199         }
4200
4201         irdma_rem_ref_cm_node(event->cm_node);
4202         kfree(event);
4203 }
4204
4205 /**
4206  * irdma_cm_post_event - queue event request for worker thread
4207  * @event: cm node's info for up event call
4208  */
4209 static void irdma_cm_post_event(struct irdma_cm_event *event)
4210 {
4211         refcount_inc(&event->cm_node->refcnt);
4212         INIT_WORK(&event->event_work, irdma_cm_event_handler);
4213         queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
4214 }
4215
4216 /**
4217  * irdma_cm_teardown_connections - teardown QPs
4218  * @iwdev: device pointer
4219  * @ipaddr: Pointer to IPv4 or IPv6 address
4220  * @nfo: Connection info
4221  * @disconnect_all: flag indicating disconnect all QPs
4222  *
4223  * teardown QPs where source or destination addr matches ip addr
4224  */
4225 void irdma_cm_teardown_connections(struct irdma_device *iwdev, u32 *ipaddr,
4226                                    struct irdma_cm_info *nfo,
4227                                    bool disconnect_all)
4228 {
4229         struct irdma_cm_core *cm_core = &iwdev->cm_core;
4230         struct list_head *list_core_temp;
4231         struct list_head *list_node;
4232         struct irdma_cm_node *cm_node;
4233         struct list_head teardown_list;
4234         struct ib_qp_attr attr;
4235
4236         INIT_LIST_HEAD(&teardown_list);
4237
4238         rcu_read_lock();
4239         irdma_teardown_list_prep(cm_core, &teardown_list, ipaddr, nfo, disconnect_all);
4240         rcu_read_unlock();
4241
4242         list_for_each_safe (list_node, list_core_temp, &teardown_list) {
4243                 cm_node = container_of(list_node, struct irdma_cm_node,
4244                                        teardown_entry);
4245                 attr.qp_state = IB_QPS_ERR;
4246                 irdma_modify_qp(&cm_node->iwqp->ibqp, &attr, IB_QP_STATE, NULL);
4247                 if (iwdev->rf->reset)
4248                         irdma_cm_disconn(cm_node->iwqp);
4249                 irdma_rem_ref_cm_node(cm_node);
4250         }
4251 }
4252
4253 /**
4254  * irdma_qhash_ctrl - enable/disable qhash for list
4255  * @iwdev: device pointer
4256  * @parent_listen_node: parent listen node
4257  * @nfo: cm info node
4258  * @ipaddr: Pointer to IPv4 or IPv6 address
4259  * @ipv4: flag indicating IPv4 when true
4260  * @ifup: flag indicating interface up when true
4261  *
4262  * Enables or disables the qhash for the node in the child
4263  * listen list that matches ipaddr. If no matching IP was found
4264  * it will allocate and add a new child listen node to the
4265  * parent listen node. The listen_list_lock is assumed to be
4266  * held when called.
4267  */
4268 static void irdma_qhash_ctrl(struct irdma_device *iwdev,
4269                              struct irdma_cm_listener *parent_listen_node,
4270                              struct irdma_cm_info *nfo, u32 *ipaddr, bool ipv4,
4271                              bool ifup)
4272 {
4273         struct list_head *child_listen_list = &parent_listen_node->child_listen_list;
4274         struct irdma_cm_listener *child_listen_node;
4275         struct list_head *pos, *tpos;
4276         bool node_allocated = false;
4277         enum irdma_quad_hash_manage_type op = ifup ?
4278                                               IRDMA_QHASH_MANAGE_TYPE_ADD :
4279                                               IRDMA_QHASH_MANAGE_TYPE_DELETE;
4280         int err;
4281
4282         list_for_each_safe (pos, tpos, child_listen_list) {
4283                 child_listen_node = list_entry(pos, struct irdma_cm_listener,
4284                                                child_listen_list);
4285                 if (!memcmp(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16))
4286                         goto set_qhash;
4287         }
4288
4289         /* if not found then add a child listener if interface is going up */
4290         if (!ifup)
4291                 return;
4292         child_listen_node = kmemdup(parent_listen_node,
4293                                     sizeof(*child_listen_node), GFP_ATOMIC);
4294         if (!child_listen_node)
4295                 return;
4296
4297         node_allocated = true;
4298         memcpy(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16);
4299
4300 set_qhash:
4301         memcpy(nfo->loc_addr, child_listen_node->loc_addr,
4302                sizeof(nfo->loc_addr));
4303         nfo->vlan_id = child_listen_node->vlan_id;
4304         err = irdma_manage_qhash(iwdev, nfo, IRDMA_QHASH_TYPE_TCP_SYN, op, NULL,
4305                                  false);
4306         if (!err) {
4307                 child_listen_node->qhash_set = ifup;
4308                 if (node_allocated)
4309                         list_add(&child_listen_node->child_listen_list,
4310                                  &parent_listen_node->child_listen_list);
4311         } else if (node_allocated) {
4312                 kfree(child_listen_node);
4313         }
4314 }
4315
4316 /**
4317  * irdma_if_notify - process an ifdown on an interface
4318  * @iwdev: device pointer
4319  * @netdev: network device structure
4320  * @ipaddr: Pointer to IPv4 or IPv6 address
4321  * @ipv4: flag indicating IPv4 when true
4322  * @ifup: flag indicating interface up when true
4323  */
4324 void irdma_if_notify(struct irdma_device *iwdev, struct net_device *netdev,
4325                      u32 *ipaddr, bool ipv4, bool ifup)
4326 {
4327         struct irdma_cm_core *cm_core = &iwdev->cm_core;
4328         unsigned long flags;
4329         struct irdma_cm_listener *listen_node;
4330         static const u32 ip_zero[4] = { 0, 0, 0, 0 };
4331         struct irdma_cm_info nfo = {};
4332         u16 vlan_id = rdma_vlan_dev_vlan_id(netdev);
4333         enum irdma_quad_hash_manage_type op = ifup ?
4334                                               IRDMA_QHASH_MANAGE_TYPE_ADD :
4335                                               IRDMA_QHASH_MANAGE_TYPE_DELETE;
4336
4337         nfo.vlan_id = vlan_id;
4338         nfo.ipv4 = ipv4;
4339         nfo.qh_qpid = 1;
4340
4341         /* Disable or enable qhash for listeners */
4342         spin_lock_irqsave(&cm_core->listen_list_lock, flags);
4343         list_for_each_entry (listen_node, &cm_core->listen_list, list) {
4344                 if (vlan_id != listen_node->vlan_id ||
4345                     (memcmp(listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16) &&
4346                      memcmp(listen_node->loc_addr, ip_zero, ipv4 ? 4 : 16)))
4347                         continue;
4348
4349                 memcpy(nfo.loc_addr, listen_node->loc_addr,
4350                        sizeof(nfo.loc_addr));
4351                 nfo.loc_port = listen_node->loc_port;
4352                 nfo.user_pri = listen_node->user_pri;
4353                 if (!list_empty(&listen_node->child_listen_list)) {
4354                         irdma_qhash_ctrl(iwdev, listen_node, &nfo, ipaddr, ipv4,
4355                                          ifup);
4356                 } else if (memcmp(listen_node->loc_addr, ip_zero,
4357                                   ipv4 ? 4 : 16)) {
4358                         if (!irdma_manage_qhash(iwdev, &nfo,
4359                                                 IRDMA_QHASH_TYPE_TCP_SYN, op,
4360                                                 NULL, false))
4361                                 listen_node->qhash_set = ifup;
4362                 }
4363         }
4364         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
4365
4366         /* disconnect any connected qp's on ifdown */
4367         if (!ifup)
4368                 irdma_cm_teardown_connections(iwdev, ipaddr, &nfo, false);
4369 }