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, sizeof(*tcph));
 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  * @ipv4: flag indicating IPv4 when true
1462  * @dst_port: listener tcp port num
1463  * @vlan_id: virtual LAN ID
1464  * @listener_state: state to match with listen node's
1465  */
1466 static struct irdma_cm_listener *
1467 irdma_find_listener(struct irdma_cm_core *cm_core, u32 *dst_addr, bool ipv4,
1468                     u16 dst_port, u16 vlan_id,
1469                     enum irdma_cm_listener_state listener_state)
1470 {
1471         struct irdma_cm_listener *listen_node;
1472         static const u32 ip_zero[4] = { 0, 0, 0, 0 };
1473         u32 listen_addr[4];
1474         u16 listen_port;
1475         unsigned long flags;
1476
1477         /* walk list and find cm_node associated with this session ID */
1478         spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1479         list_for_each_entry (listen_node, &cm_core->listen_list, list) {
1480                 memcpy(listen_addr, listen_node->loc_addr, sizeof(listen_addr));
1481                 listen_port = listen_node->loc_port;
1482                 if (listen_node->ipv4 != ipv4 || listen_port != dst_port ||
1483                     !(listener_state & listen_node->listener_state))
1484                         continue;
1485                 /* compare node pair, return node handle if a match */
1486                 if (!memcmp(listen_addr, ip_zero, sizeof(listen_addr)) ||
1487                     (!memcmp(listen_addr, dst_addr, sizeof(listen_addr)) &&
1488                      vlan_id == listen_node->vlan_id)) {
1489                         refcount_inc(&listen_node->refcnt);
1490                         spin_unlock_irqrestore(&cm_core->listen_list_lock,
1491                                                flags);
1492                         trace_irdma_find_listener(listen_node);
1493                         return listen_node;
1494                 }
1495         }
1496         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1497
1498         return NULL;
1499 }
1500
1501 /**
1502  * irdma_del_multiple_qhash - Remove qhash and child listens
1503  * @iwdev: iWarp device
1504  * @cm_info: CM info for parent listen node
1505  * @cm_parent_listen_node: The parent listen node
1506  */
1507 static int irdma_del_multiple_qhash(struct irdma_device *iwdev,
1508                                     struct irdma_cm_info *cm_info,
1509                                     struct irdma_cm_listener *cm_parent_listen_node)
1510 {
1511         struct irdma_cm_listener *child_listen_node;
1512         struct list_head *pos, *tpos;
1513         unsigned long flags;
1514         int ret = -EINVAL;
1515
1516         spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1517         list_for_each_safe (pos, tpos,
1518                             &cm_parent_listen_node->child_listen_list) {
1519                 child_listen_node = list_entry(pos, struct irdma_cm_listener,
1520                                                child_listen_list);
1521                 if (child_listen_node->ipv4)
1522                         ibdev_dbg(&iwdev->ibdev,
1523                                   "CM: removing child listen for IP=%pI4, port=%d, vlan=%d\n",
1524                                   child_listen_node->loc_addr,
1525                                   child_listen_node->loc_port,
1526                                   child_listen_node->vlan_id);
1527                 else
1528                         ibdev_dbg(&iwdev->ibdev,
1529                                   "CM: removing child listen for IP=%pI6, port=%d, vlan=%d\n",
1530                                   child_listen_node->loc_addr,
1531                                   child_listen_node->loc_port,
1532                                   child_listen_node->vlan_id);
1533                 trace_irdma_del_multiple_qhash(child_listen_node);
1534                 list_del(pos);
1535                 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1536                        sizeof(cm_info->loc_addr));
1537                 cm_info->vlan_id = child_listen_node->vlan_id;
1538                 if (child_listen_node->qhash_set) {
1539                         ret = irdma_manage_qhash(iwdev, cm_info,
1540                                                  IRDMA_QHASH_TYPE_TCP_SYN,
1541                                                  IRDMA_QHASH_MANAGE_TYPE_DELETE,
1542                                                  NULL, false);
1543                         child_listen_node->qhash_set = false;
1544                 } else {
1545                         ret = 0;
1546                 }
1547                 ibdev_dbg(&iwdev->ibdev,
1548                           "CM: Child listen node freed = %p\n",
1549                           child_listen_node);
1550                 kfree(child_listen_node);
1551                 cm_parent_listen_node->cm_core->stats_listen_nodes_destroyed++;
1552         }
1553         spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1554
1555         return ret;
1556 }
1557
1558 /**
1559  * irdma_netdev_vlan_ipv6 - Gets the netdev and mac
1560  * @addr: local IPv6 address
1561  * @vlan_id: vlan id for the given IPv6 address
1562  * @mac: mac address for the given IPv6 address
1563  *
1564  * Returns the net_device of the IPv6 address and also sets the
1565  * vlan id and mac for that address.
1566  */
1567 struct net_device *irdma_netdev_vlan_ipv6(u32 *addr, u16 *vlan_id, u8 *mac)
1568 {
1569         struct net_device *ip_dev = NULL;
1570         struct in6_addr laddr6;
1571
1572         if (!IS_ENABLED(CONFIG_IPV6))
1573                 return NULL;
1574
1575         irdma_copy_ip_htonl(laddr6.in6_u.u6_addr32, addr);
1576         if (vlan_id)
1577                 *vlan_id = 0xFFFF;      /* Match rdma_vlan_dev_vlan_id() */
1578         if (mac)
1579                 eth_zero_addr(mac);
1580
1581         rcu_read_lock();
1582         for_each_netdev_rcu (&init_net, ip_dev) {
1583                 if (ipv6_chk_addr(&init_net, &laddr6, ip_dev, 1)) {
1584                         if (vlan_id)
1585                                 *vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1586                         if (ip_dev->dev_addr && mac)
1587                                 ether_addr_copy(mac, ip_dev->dev_addr);
1588                         break;
1589                 }
1590         }
1591         rcu_read_unlock();
1592
1593         return ip_dev;
1594 }
1595
1596 /**
1597  * irdma_get_vlan_ipv4 - Returns the vlan_id for IPv4 address
1598  * @addr: local IPv4 address
1599  */
1600 u16 irdma_get_vlan_ipv4(u32 *addr)
1601 {
1602         struct net_device *netdev;
1603         u16 vlan_id = 0xFFFF;
1604
1605         netdev = ip_dev_find(&init_net, htonl(addr[0]));
1606         if (netdev) {
1607                 vlan_id = rdma_vlan_dev_vlan_id(netdev);
1608                 dev_put(netdev);
1609         }
1610
1611         return vlan_id;
1612 }
1613
1614 /**
1615  * irdma_add_mqh_6 - Adds multiple qhashes for IPv6
1616  * @iwdev: iWarp device
1617  * @cm_info: CM info for parent listen node
1618  * @cm_parent_listen_node: The parent listen node
1619  *
1620  * Adds a qhash and a child listen node for every IPv6 address
1621  * on the adapter and adds the associated qhash filter
1622  */
1623 static int irdma_add_mqh_6(struct irdma_device *iwdev,
1624                            struct irdma_cm_info *cm_info,
1625                            struct irdma_cm_listener *cm_parent_listen_node)
1626 {
1627         struct net_device *ip_dev;
1628         struct inet6_dev *idev;
1629         struct inet6_ifaddr *ifp, *tmp;
1630         struct irdma_cm_listener *child_listen_node;
1631         unsigned long flags;
1632         int ret = 0;
1633
1634         rtnl_lock();
1635         for_each_netdev(&init_net, ip_dev) {
1636                 if (!(ip_dev->flags & IFF_UP))
1637                         continue;
1638
1639                 if (((rdma_vlan_dev_vlan_id(ip_dev) >= VLAN_N_VID) ||
1640                      (rdma_vlan_dev_real_dev(ip_dev) != iwdev->netdev)) &&
1641                     ip_dev != iwdev->netdev)
1642                         continue;
1643
1644                 idev = __in6_dev_get(ip_dev);
1645                 if (!idev) {
1646                         ibdev_dbg(&iwdev->ibdev, "CM: idev == NULL\n");
1647                         break;
1648                 }
1649                 list_for_each_entry_safe (ifp, tmp, &idev->addr_list, if_list) {
1650                         ibdev_dbg(&iwdev->ibdev, "CM: IP=%pI6, vlan_id=%d, MAC=%pM\n",
1651                                   &ifp->addr, rdma_vlan_dev_vlan_id(ip_dev),
1652                                   ip_dev->dev_addr);
1653                         child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_KERNEL);
1654                         ibdev_dbg(&iwdev->ibdev, "CM: Allocating child listener %p\n",
1655                                   child_listen_node);
1656                         if (!child_listen_node) {
1657                                 ibdev_dbg(&iwdev->ibdev, "CM: listener memory allocation\n");
1658                                 ret = -ENOMEM;
1659                                 goto exit;
1660                         }
1661
1662                         cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1663                         cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1664                         memcpy(child_listen_node, cm_parent_listen_node,
1665                                sizeof(*child_listen_node));
1666                         irdma_copy_ip_ntohl(child_listen_node->loc_addr,
1667                                             ifp->addr.in6_u.u6_addr32);
1668                         memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1669                                sizeof(cm_info->loc_addr));
1670                         ret = irdma_manage_qhash(iwdev, cm_info,
1671                                                  IRDMA_QHASH_TYPE_TCP_SYN,
1672                                                  IRDMA_QHASH_MANAGE_TYPE_ADD,
1673                                                  NULL, true);
1674                         if (ret) {
1675                                 kfree(child_listen_node);
1676                                 continue;
1677                         }
1678
1679                         trace_irdma_add_mqh_6(iwdev, child_listen_node,
1680                                               ip_dev->dev_addr);
1681
1682                         child_listen_node->qhash_set = true;
1683                         spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1684                         list_add(&child_listen_node->child_listen_list,
1685                                  &cm_parent_listen_node->child_listen_list);
1686                         spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1687                         cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
1688                 }
1689         }
1690 exit:
1691         rtnl_unlock();
1692
1693         return ret;
1694 }
1695
1696 /**
1697  * irdma_add_mqh_4 - Adds multiple qhashes for IPv4
1698  * @iwdev: iWarp device
1699  * @cm_info: CM info for parent listen node
1700  * @cm_parent_listen_node: The parent listen node
1701  *
1702  * Adds a qhash and a child listen node for every IPv4 address
1703  * on the adapter and adds the associated qhash filter
1704  */
1705 static int irdma_add_mqh_4(struct irdma_device *iwdev,
1706                            struct irdma_cm_info *cm_info,
1707                            struct irdma_cm_listener *cm_parent_listen_node)
1708 {
1709         struct net_device *ip_dev;
1710         struct in_device *idev;
1711         struct irdma_cm_listener *child_listen_node;
1712         unsigned long flags;
1713         const struct in_ifaddr *ifa;
1714         int ret = 0;
1715
1716         rtnl_lock();
1717         for_each_netdev(&init_net, ip_dev) {
1718                 if (!(ip_dev->flags & IFF_UP))
1719                         continue;
1720
1721                 if (((rdma_vlan_dev_vlan_id(ip_dev) >= VLAN_N_VID) ||
1722                      (rdma_vlan_dev_real_dev(ip_dev) != iwdev->netdev)) &&
1723                     ip_dev != iwdev->netdev)
1724                         continue;
1725
1726                 idev = in_dev_get(ip_dev);
1727                 if (!idev)
1728                         continue;
1729
1730                 in_dev_for_each_ifa_rtnl(ifa, idev) {
1731                         ibdev_dbg(&iwdev->ibdev,
1732                                   "CM: Allocating child CM Listener forIP=%pI4, vlan_id=%d, MAC=%pM\n",
1733                                   &ifa->ifa_address, rdma_vlan_dev_vlan_id(ip_dev),
1734                                   ip_dev->dev_addr);
1735                         child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_KERNEL);
1736                         cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
1737                         ibdev_dbg(&iwdev->ibdev, "CM: Allocating child listener %p\n",
1738                                   child_listen_node);
1739                         if (!child_listen_node) {
1740                                 ibdev_dbg(&iwdev->ibdev, "CM: listener memory allocation\n");
1741                                 in_dev_put(idev);
1742                                 ret = -ENOMEM;
1743                                 goto exit;
1744                         }
1745
1746                         cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1747                         cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1748                         memcpy(child_listen_node, cm_parent_listen_node,
1749                                sizeof(*child_listen_node));
1750                         child_listen_node->loc_addr[0] =
1751                                 ntohl(ifa->ifa_address);
1752                         memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1753                                sizeof(cm_info->loc_addr));
1754                         ret = irdma_manage_qhash(iwdev, cm_info,
1755                                                  IRDMA_QHASH_TYPE_TCP_SYN,
1756                                                  IRDMA_QHASH_MANAGE_TYPE_ADD,
1757                                                  NULL, true);
1758                         if (ret) {
1759                                 kfree(child_listen_node);
1760                                 cm_parent_listen_node->cm_core
1761                                         ->stats_listen_nodes_created--;
1762                                 continue;
1763                         }
1764
1765                         trace_irdma_add_mqh_4(iwdev, child_listen_node,
1766                                               ip_dev->dev_addr);
1767
1768                         child_listen_node->qhash_set = true;
1769                         spin_lock_irqsave(&iwdev->cm_core.listen_list_lock,
1770                                           flags);
1771                         list_add(&child_listen_node->child_listen_list,
1772                                  &cm_parent_listen_node->child_listen_list);
1773                         spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1774                 }
1775                 in_dev_put(idev);
1776         }
1777 exit:
1778         rtnl_unlock();
1779
1780         return ret;
1781 }
1782
1783 /**
1784  * irdma_add_mqh - Adds multiple qhashes
1785  * @iwdev: iWarp device
1786  * @cm_info: CM info for parent listen node
1787  * @cm_listen_node: The parent listen node
1788  */
1789 static int irdma_add_mqh(struct irdma_device *iwdev,
1790                          struct irdma_cm_info *cm_info,
1791                          struct irdma_cm_listener *cm_listen_node)
1792 {
1793         if (cm_info->ipv4)
1794                 return irdma_add_mqh_4(iwdev, cm_info, cm_listen_node);
1795         else
1796                 return irdma_add_mqh_6(iwdev, cm_info, cm_listen_node);
1797 }
1798
1799 /**
1800  * irdma_reset_list_prep - add connection nodes slated for reset to list
1801  * @cm_core: cm's core
1802  * @listener: pointer to listener node
1803  * @reset_list: a list to which cm_node will be selected
1804  */
1805 static void irdma_reset_list_prep(struct irdma_cm_core *cm_core,
1806                                   struct irdma_cm_listener *listener,
1807                                   struct list_head *reset_list)
1808 {
1809         struct irdma_cm_node *cm_node;
1810         int bkt;
1811
1812         hash_for_each_rcu(cm_core->cm_hash_tbl, bkt, cm_node, list) {
1813                 if (cm_node->listener == listener &&
1814                     !cm_node->accelerated &&
1815                     refcount_inc_not_zero(&cm_node->refcnt))
1816                         list_add(&cm_node->reset_entry, reset_list);
1817         }
1818 }
1819
1820 /**
1821  * irdma_dec_refcnt_listen - delete listener and associated cm nodes
1822  * @cm_core: cm's core
1823  * @listener: pointer to listener node
1824  * @free_hanging_nodes: to free associated cm_nodes
1825  * @apbvt_del: flag to delete the apbvt
1826  */
1827 static int irdma_dec_refcnt_listen(struct irdma_cm_core *cm_core,
1828                                    struct irdma_cm_listener *listener,
1829                                    int free_hanging_nodes, bool apbvt_del)
1830 {
1831         int err;
1832         struct list_head *list_pos;
1833         struct list_head *list_temp;
1834         struct irdma_cm_node *cm_node;
1835         struct list_head reset_list;
1836         struct irdma_cm_info nfo;
1837         enum irdma_cm_node_state old_state;
1838         unsigned long flags;
1839
1840         trace_irdma_dec_refcnt_listen(listener, __builtin_return_address(0));
1841         /* free non-accelerated child nodes for this listener */
1842         INIT_LIST_HEAD(&reset_list);
1843         if (free_hanging_nodes) {
1844                 rcu_read_lock();
1845                 irdma_reset_list_prep(cm_core, listener, &reset_list);
1846                 rcu_read_unlock();
1847         }
1848
1849         list_for_each_safe (list_pos, list_temp, &reset_list) {
1850                 cm_node = container_of(list_pos, struct irdma_cm_node,
1851                                        reset_entry);
1852                 if (cm_node->state >= IRDMA_CM_STATE_FIN_WAIT1) {
1853                         irdma_rem_ref_cm_node(cm_node);
1854                         continue;
1855                 }
1856
1857                 irdma_cleanup_retrans_entry(cm_node);
1858                 err = irdma_send_reset(cm_node);
1859                 if (err) {
1860                         cm_node->state = IRDMA_CM_STATE_CLOSED;
1861                         ibdev_dbg(&cm_node->iwdev->ibdev,
1862                                   "CM: send reset failed\n");
1863                 } else {
1864                         old_state = cm_node->state;
1865                         cm_node->state = IRDMA_CM_STATE_LISTENER_DESTROYED;
1866                         if (old_state != IRDMA_CM_STATE_MPAREQ_RCVD)
1867                                 irdma_rem_ref_cm_node(cm_node);
1868                 }
1869         }
1870
1871         if (refcount_dec_and_test(&listener->refcnt)) {
1872                 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1873                 list_del(&listener->list);
1874                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1875
1876                 if (apbvt_del)
1877                         irdma_del_apbvt(listener->iwdev,
1878                                         listener->apbvt_entry);
1879                 memcpy(nfo.loc_addr, listener->loc_addr, sizeof(nfo.loc_addr));
1880                 nfo.loc_port = listener->loc_port;
1881                 nfo.ipv4 = listener->ipv4;
1882                 nfo.vlan_id = listener->vlan_id;
1883                 nfo.user_pri = listener->user_pri;
1884                 nfo.qh_qpid = listener->iwdev->vsi.ilq->qp_id;
1885
1886                 if (!list_empty(&listener->child_listen_list)) {
1887                         irdma_del_multiple_qhash(listener->iwdev, &nfo,
1888                                                  listener);
1889                 } else {
1890                         if (listener->qhash_set)
1891                                 irdma_manage_qhash(listener->iwdev,
1892                                                    &nfo,
1893                                                    IRDMA_QHASH_TYPE_TCP_SYN,
1894                                                    IRDMA_QHASH_MANAGE_TYPE_DELETE,
1895                                                    NULL, false);
1896                 }
1897
1898                 cm_core->stats_listen_destroyed++;
1899                 cm_core->stats_listen_nodes_destroyed++;
1900                 ibdev_dbg(&listener->iwdev->ibdev,
1901                           "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",
1902                           listener->loc_port, listener->loc_addr, listener,
1903                           listener->cm_id, listener->qhash_set,
1904                           listener->vlan_id, apbvt_del);
1905                 kfree(listener);
1906                 listener = NULL;
1907                 return 0;
1908         }
1909
1910         return -EINVAL;
1911 }
1912
1913 /**
1914  * irdma_cm_del_listen - delete a listener
1915  * @cm_core: cm's core
1916  * @listener: passive connection's listener
1917  * @apbvt_del: flag to delete apbvt
1918  */
1919 static int irdma_cm_del_listen(struct irdma_cm_core *cm_core,
1920                                struct irdma_cm_listener *listener,
1921                                bool apbvt_del)
1922 {
1923         listener->listener_state = IRDMA_CM_LISTENER_PASSIVE_STATE;
1924         listener->cm_id = NULL;
1925
1926         return irdma_dec_refcnt_listen(cm_core, listener, 1, apbvt_del);
1927 }
1928
1929 /**
1930  * irdma_addr_resolve_neigh - resolve neighbor address
1931  * @iwdev: iwarp device structure
1932  * @src_ip: local ip address
1933  * @dst_ip: remote ip address
1934  * @arpindex: if there is an arp entry
1935  */
1936 static int irdma_addr_resolve_neigh(struct irdma_device *iwdev, u32 src_ip,
1937                                     u32 dst_ip, int arpindex)
1938 {
1939         struct rtable *rt;
1940         struct neighbour *neigh;
1941         int rc = arpindex;
1942         __be32 dst_ipaddr = htonl(dst_ip);
1943         __be32 src_ipaddr = htonl(src_ip);
1944
1945         rt = ip_route_output(&init_net, dst_ipaddr, src_ipaddr, 0, 0);
1946         if (IS_ERR(rt)) {
1947                 ibdev_dbg(&iwdev->ibdev, "CM: ip_route_output fail\n");
1948                 return -EINVAL;
1949         }
1950
1951         neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr);
1952         if (!neigh)
1953                 goto exit;
1954
1955         if (neigh->nud_state & NUD_VALID)
1956                 rc = irdma_add_arp(iwdev->rf, &dst_ip, true, neigh->ha);
1957         else
1958                 neigh_event_send(neigh, NULL);
1959         if (neigh)
1960                 neigh_release(neigh);
1961 exit:
1962         ip_rt_put(rt);
1963
1964         return rc;
1965 }
1966
1967 /**
1968  * irdma_get_dst_ipv6 - get destination cache entry via ipv6 lookup
1969  * @src_addr: local ipv6 sock address
1970  * @dst_addr: destination ipv6 sock address
1971  */
1972 static struct dst_entry *irdma_get_dst_ipv6(struct sockaddr_in6 *src_addr,
1973                                             struct sockaddr_in6 *dst_addr)
1974 {
1975         struct dst_entry *dst = NULL;
1976
1977         if ((IS_ENABLED(CONFIG_IPV6))) {
1978                 struct flowi6 fl6 = {};
1979
1980                 fl6.daddr = dst_addr->sin6_addr;
1981                 fl6.saddr = src_addr->sin6_addr;
1982                 if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
1983                         fl6.flowi6_oif = dst_addr->sin6_scope_id;
1984
1985                 dst = ip6_route_output(&init_net, NULL, &fl6);
1986         }
1987
1988         return dst;
1989 }
1990
1991 /**
1992  * irdma_addr_resolve_neigh_ipv6 - resolve neighbor ipv6 address
1993  * @iwdev: iwarp device structure
1994  * @src: local ip address
1995  * @dest: remote ip address
1996  * @arpindex: if there is an arp entry
1997  */
1998 static int irdma_addr_resolve_neigh_ipv6(struct irdma_device *iwdev, u32 *src,
1999                                          u32 *dest, int arpindex)
2000 {
2001         struct neighbour *neigh;
2002         int rc = arpindex;
2003         struct dst_entry *dst;
2004         struct sockaddr_in6 dst_addr = {};
2005         struct sockaddr_in6 src_addr = {};
2006
2007         dst_addr.sin6_family = AF_INET6;
2008         irdma_copy_ip_htonl(dst_addr.sin6_addr.in6_u.u6_addr32, dest);
2009         src_addr.sin6_family = AF_INET6;
2010         irdma_copy_ip_htonl(src_addr.sin6_addr.in6_u.u6_addr32, src);
2011         dst = irdma_get_dst_ipv6(&src_addr, &dst_addr);
2012         if (!dst || dst->error) {
2013                 if (dst) {
2014                         dst_release(dst);
2015                         ibdev_dbg(&iwdev->ibdev,
2016                                   "CM: ip6_route_output returned dst->error = %d\n",
2017                                   dst->error);
2018                 }
2019                 return -EINVAL;
2020         }
2021
2022         neigh = dst_neigh_lookup(dst, dst_addr.sin6_addr.in6_u.u6_addr32);
2023         if (!neigh)
2024                 goto exit;
2025
2026         ibdev_dbg(&iwdev->ibdev, "CM: dst_neigh_lookup MAC=%pM\n",
2027                   neigh->ha);
2028
2029         trace_irdma_addr_resolve(iwdev, neigh->ha);
2030
2031         if (neigh->nud_state & NUD_VALID)
2032                 rc = irdma_add_arp(iwdev->rf, dest, false, neigh->ha);
2033         else
2034                 neigh_event_send(neigh, NULL);
2035         if (neigh)
2036                 neigh_release(neigh);
2037 exit:
2038         dst_release(dst);
2039
2040         return rc;
2041 }
2042
2043 /**
2044  * irdma_find_node - find a cm node that matches the reference cm node
2045  * @cm_core: cm's core
2046  * @rem_port: remote tcp port num
2047  * @rem_addr: remote ip addr
2048  * @loc_port: local tcp port num
2049  * @loc_addr: local ip addr
2050  * @vlan_id: local VLAN ID
2051  */
2052 struct irdma_cm_node *irdma_find_node(struct irdma_cm_core *cm_core,
2053                                       u16 rem_port, u32 *rem_addr, u16 loc_port,
2054                                       u32 *loc_addr, u16 vlan_id)
2055 {
2056         struct irdma_cm_node *cm_node;
2057         u32 key = (rem_port << 16) | loc_port;
2058
2059         rcu_read_lock();
2060         hash_for_each_possible_rcu(cm_core->cm_hash_tbl, cm_node, list, key) {
2061                 if (cm_node->vlan_id == vlan_id &&
2062                     cm_node->loc_port == loc_port && cm_node->rem_port == rem_port &&
2063                     !memcmp(cm_node->loc_addr, loc_addr, sizeof(cm_node->loc_addr)) &&
2064                     !memcmp(cm_node->rem_addr, rem_addr, sizeof(cm_node->rem_addr))) {
2065                         if (!refcount_inc_not_zero(&cm_node->refcnt))
2066                                 goto exit;
2067                         rcu_read_unlock();
2068                         trace_irdma_find_node(cm_node, 0, NULL);
2069                         return cm_node;
2070                 }
2071         }
2072
2073 exit:
2074         rcu_read_unlock();
2075
2076         /* no owner node */
2077         return NULL;
2078 }
2079
2080 /**
2081  * irdma_add_hte_node - add a cm node to the hash table
2082  * @cm_core: cm's core
2083  * @cm_node: connection's node
2084  */
2085 static void irdma_add_hte_node(struct irdma_cm_core *cm_core,
2086                                struct irdma_cm_node *cm_node)
2087 {
2088         unsigned long flags;
2089         u32 key = (cm_node->rem_port << 16) | cm_node->loc_port;
2090
2091         spin_lock_irqsave(&cm_core->ht_lock, flags);
2092         hash_add_rcu(cm_core->cm_hash_tbl, &cm_node->list, key);
2093         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
2094 }
2095
2096 /**
2097  * irdma_ipv4_is_lpb - check if loopback
2098  * @loc_addr: local addr to compare
2099  * @rem_addr: remote address
2100  */
2101 bool irdma_ipv4_is_lpb(u32 loc_addr, u32 rem_addr)
2102 {
2103         return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr);
2104 }
2105
2106 /**
2107  * irdma_ipv6_is_lpb - check if loopback
2108  * @loc_addr: local addr to compare
2109  * @rem_addr: remote address
2110  */
2111 bool irdma_ipv6_is_lpb(u32 *loc_addr, u32 *rem_addr)
2112 {
2113         struct in6_addr raddr6;
2114
2115         irdma_copy_ip_htonl(raddr6.in6_u.u6_addr32, rem_addr);
2116
2117         return !memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6);
2118 }
2119
2120 /**
2121  * irdma_cm_create_ah - create a cm address handle
2122  * @cm_node: The connection manager node to create AH for
2123  * @wait: Provides option to wait for ah creation or not
2124  */
2125 static int irdma_cm_create_ah(struct irdma_cm_node *cm_node, bool wait)
2126 {
2127         struct irdma_ah_info ah_info = {};
2128         struct irdma_device *iwdev = cm_node->iwdev;
2129
2130         ether_addr_copy(ah_info.mac_addr, iwdev->netdev->dev_addr);
2131
2132         ah_info.hop_ttl = 0x40;
2133         ah_info.tc_tos = cm_node->tos;
2134         ah_info.vsi = &iwdev->vsi;
2135
2136         if (cm_node->ipv4) {
2137                 ah_info.ipv4_valid = true;
2138                 ah_info.dest_ip_addr[0] = cm_node->rem_addr[0];
2139                 ah_info.src_ip_addr[0] = cm_node->loc_addr[0];
2140                 ah_info.do_lpbk = irdma_ipv4_is_lpb(ah_info.src_ip_addr[0],
2141                                                     ah_info.dest_ip_addr[0]);
2142         } else {
2143                 memcpy(ah_info.dest_ip_addr, cm_node->rem_addr,
2144                        sizeof(ah_info.dest_ip_addr));
2145                 memcpy(ah_info.src_ip_addr, cm_node->loc_addr,
2146                        sizeof(ah_info.src_ip_addr));
2147                 ah_info.do_lpbk = irdma_ipv6_is_lpb(ah_info.src_ip_addr,
2148                                                     ah_info.dest_ip_addr);
2149         }
2150
2151         ah_info.vlan_tag = cm_node->vlan_id;
2152         if (cm_node->vlan_id < VLAN_N_VID) {
2153                 ah_info.insert_vlan_tag = 1;
2154                 ah_info.vlan_tag |= cm_node->user_pri << VLAN_PRIO_SHIFT;
2155         }
2156
2157         ah_info.dst_arpindex =
2158                 irdma_arp_table(iwdev->rf, ah_info.dest_ip_addr,
2159                                 ah_info.ipv4_valid, NULL, IRDMA_ARP_RESOLVE);
2160
2161         if (irdma_puda_create_ah(&iwdev->rf->sc_dev, &ah_info, wait,
2162                                  IRDMA_PUDA_RSRC_TYPE_ILQ, cm_node,
2163                                  &cm_node->ah))
2164                 return -ENOMEM;
2165
2166         trace_irdma_create_ah(cm_node);
2167         return 0;
2168 }
2169
2170 /**
2171  * irdma_cm_free_ah - free a cm address handle
2172  * @cm_node: The connection manager node to create AH for
2173  */
2174 static void irdma_cm_free_ah(struct irdma_cm_node *cm_node)
2175 {
2176         struct irdma_device *iwdev = cm_node->iwdev;
2177
2178         trace_irdma_cm_free_ah(cm_node);
2179         irdma_puda_free_ah(&iwdev->rf->sc_dev, cm_node->ah);
2180         cm_node->ah = NULL;
2181 }
2182
2183 /**
2184  * irdma_make_cm_node - create a new instance of a cm node
2185  * @cm_core: cm's core
2186  * @iwdev: iwarp device structure
2187  * @cm_info: quad info for connection
2188  * @listener: passive connection's listener
2189  */
2190 static struct irdma_cm_node *
2191 irdma_make_cm_node(struct irdma_cm_core *cm_core, struct irdma_device *iwdev,
2192                    struct irdma_cm_info *cm_info,
2193                    struct irdma_cm_listener *listener)
2194 {
2195         struct irdma_cm_node *cm_node;
2196         int oldarpindex;
2197         int arpindex;
2198         struct net_device *netdev = iwdev->netdev;
2199
2200         /* create an hte and cm_node for this instance */
2201         cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
2202         if (!cm_node)
2203                 return NULL;
2204
2205         /* set our node specific transport info */
2206         cm_node->ipv4 = cm_info->ipv4;
2207         cm_node->vlan_id = cm_info->vlan_id;
2208         if (cm_node->vlan_id >= VLAN_N_VID && iwdev->dcb_vlan_mode)
2209                 cm_node->vlan_id = 0;
2210         cm_node->tos = cm_info->tos;
2211         cm_node->user_pri = cm_info->user_pri;
2212         if (listener) {
2213                 if (listener->tos != cm_info->tos)
2214                         ibdev_warn(&iwdev->ibdev,
2215                                    "application TOS[%d] and remote client TOS[%d] mismatch\n",
2216                                    listener->tos, cm_info->tos);
2217                 if (iwdev->vsi.dscp_mode) {
2218                         cm_node->user_pri = listener->user_pri;
2219                 } else {
2220                         cm_node->tos = max(listener->tos, cm_info->tos);
2221                         cm_node->user_pri = rt_tos2priority(cm_node->tos);
2222                 }
2223                 ibdev_dbg(&iwdev->ibdev,
2224                           "DCB: listener: TOS:[%d] UP:[%d]\n", cm_node->tos,
2225                           cm_node->user_pri);
2226                 trace_irdma_listener_tos(iwdev, cm_node->tos,
2227                                          cm_node->user_pri);
2228         }
2229         memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr));
2230         memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr));
2231         cm_node->loc_port = cm_info->loc_port;
2232         cm_node->rem_port = cm_info->rem_port;
2233
2234         cm_node->mpa_frame_rev = IRDMA_CM_DEFAULT_MPA_VER;
2235         cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
2236         cm_node->iwdev = iwdev;
2237         cm_node->dev = &iwdev->rf->sc_dev;
2238
2239         cm_node->ird_size = cm_node->dev->hw_attrs.max_hw_ird;
2240         cm_node->ord_size = cm_node->dev->hw_attrs.max_hw_ord;
2241
2242         cm_node->listener = listener;
2243         cm_node->cm_id = cm_info->cm_id;
2244         ether_addr_copy(cm_node->loc_mac, netdev->dev_addr);
2245         spin_lock_init(&cm_node->retrans_list_lock);
2246         cm_node->ack_rcvd = false;
2247
2248         init_completion(&cm_node->establish_comp);
2249         refcount_set(&cm_node->refcnt, 1);
2250         /* associate our parent CM core */
2251         cm_node->cm_core = cm_core;
2252         cm_node->tcp_cntxt.loc_id = IRDMA_CM_DEFAULT_LOCAL_ID;
2253         cm_node->tcp_cntxt.rcv_wscale = iwdev->rcv_wscale;
2254         cm_node->tcp_cntxt.rcv_wnd = iwdev->rcv_wnd >> cm_node->tcp_cntxt.rcv_wscale;
2255         if (cm_node->ipv4) {
2256                 cm_node->tcp_cntxt.loc_seq_num = secure_tcp_seq(htonl(cm_node->loc_addr[0]),
2257                                                                 htonl(cm_node->rem_addr[0]),
2258                                                                 htons(cm_node->loc_port),
2259                                                                 htons(cm_node->rem_port));
2260                 cm_node->tcp_cntxt.mss = iwdev->vsi.mtu - IRDMA_MTU_TO_MSS_IPV4;
2261         } else if (IS_ENABLED(CONFIG_IPV6)) {
2262                 __be32 loc[4] = {
2263                         htonl(cm_node->loc_addr[0]), htonl(cm_node->loc_addr[1]),
2264                         htonl(cm_node->loc_addr[2]), htonl(cm_node->loc_addr[3])
2265                 };
2266                 __be32 rem[4] = {
2267                         htonl(cm_node->rem_addr[0]), htonl(cm_node->rem_addr[1]),
2268                         htonl(cm_node->rem_addr[2]), htonl(cm_node->rem_addr[3])
2269                 };
2270                 cm_node->tcp_cntxt.loc_seq_num = secure_tcpv6_seq(loc, rem,
2271                                                                   htons(cm_node->loc_port),
2272                                                                   htons(cm_node->rem_port));
2273                 cm_node->tcp_cntxt.mss = iwdev->vsi.mtu - IRDMA_MTU_TO_MSS_IPV6;
2274         }
2275
2276         if ((cm_node->ipv4 &&
2277              irdma_ipv4_is_lpb(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
2278             (!cm_node->ipv4 &&
2279              irdma_ipv6_is_lpb(cm_node->loc_addr, cm_node->rem_addr))) {
2280                 cm_node->do_lpb = true;
2281                 arpindex = irdma_arp_table(iwdev->rf, cm_node->rem_addr,
2282                                            cm_node->ipv4, NULL,
2283                                            IRDMA_ARP_RESOLVE);
2284         } else {
2285                 oldarpindex = irdma_arp_table(iwdev->rf, cm_node->rem_addr,
2286                                               cm_node->ipv4, NULL,
2287                                               IRDMA_ARP_RESOLVE);
2288                 if (cm_node->ipv4)
2289                         arpindex = irdma_addr_resolve_neigh(iwdev,
2290                                                             cm_info->loc_addr[0],
2291                                                             cm_info->rem_addr[0],
2292                                                             oldarpindex);
2293                 else if (IS_ENABLED(CONFIG_IPV6))
2294                         arpindex = irdma_addr_resolve_neigh_ipv6(iwdev,
2295                                                                  cm_info->loc_addr,
2296                                                                  cm_info->rem_addr,
2297                                                                  oldarpindex);
2298                 else
2299                         arpindex = -EINVAL;
2300         }
2301
2302         if (arpindex < 0)
2303                 goto err;
2304
2305         ether_addr_copy(cm_node->rem_mac,
2306                         iwdev->rf->arp_table[arpindex].mac_addr);
2307         irdma_add_hte_node(cm_core, cm_node);
2308         cm_core->stats_nodes_created++;
2309         return cm_node;
2310
2311 err:
2312         kfree(cm_node);
2313
2314         return NULL;
2315 }
2316
2317 static void irdma_destroy_connection(struct irdma_cm_node *cm_node)
2318 {
2319         struct irdma_cm_core *cm_core = cm_node->cm_core;
2320         struct irdma_qp *iwqp;
2321         struct irdma_cm_info nfo;
2322
2323         /* if the node is destroyed before connection was accelerated */
2324         if (!cm_node->accelerated && cm_node->accept_pend) {
2325                 ibdev_dbg(&cm_node->iwdev->ibdev,
2326                           "CM: node destroyed before established\n");
2327                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
2328         }
2329         if (cm_node->close_entry)
2330                 irdma_handle_close_entry(cm_node, 0);
2331         if (cm_node->listener) {
2332                 irdma_dec_refcnt_listen(cm_core, cm_node->listener, 0, true);
2333         } else {
2334                 if (cm_node->apbvt_set) {
2335                         irdma_del_apbvt(cm_node->iwdev, cm_node->apbvt_entry);
2336                         cm_node->apbvt_set = 0;
2337                 }
2338                 irdma_get_addr_info(cm_node, &nfo);
2339                 if (cm_node->qhash_set) {
2340                         nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id;
2341                         irdma_manage_qhash(cm_node->iwdev, &nfo,
2342                                            IRDMA_QHASH_TYPE_TCP_ESTABLISHED,
2343                                            IRDMA_QHASH_MANAGE_TYPE_DELETE, NULL,
2344                                            false);
2345                         cm_node->qhash_set = 0;
2346                 }
2347         }
2348
2349         iwqp = cm_node->iwqp;
2350         if (iwqp) {
2351                 cm_node->cm_id->rem_ref(cm_node->cm_id);
2352                 cm_node->cm_id = NULL;
2353                 iwqp->cm_id = NULL;
2354                 irdma_qp_rem_ref(&iwqp->ibqp);
2355                 cm_node->iwqp = NULL;
2356         } else if (cm_node->qhash_set) {
2357                 irdma_get_addr_info(cm_node, &nfo);
2358                 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id;
2359                 irdma_manage_qhash(cm_node->iwdev, &nfo,
2360                                    IRDMA_QHASH_TYPE_TCP_ESTABLISHED,
2361                                    IRDMA_QHASH_MANAGE_TYPE_DELETE, NULL, false);
2362                 cm_node->qhash_set = 0;
2363         }
2364
2365         cm_core->cm_free_ah(cm_node);
2366 }
2367
2368 /**
2369  * irdma_rem_ref_cm_node - destroy an instance of a cm node
2370  * @cm_node: connection's node
2371  */
2372 void irdma_rem_ref_cm_node(struct irdma_cm_node *cm_node)
2373 {
2374         struct irdma_cm_core *cm_core = cm_node->cm_core;
2375         unsigned long flags;
2376
2377         trace_irdma_rem_ref_cm_node(cm_node, 0, __builtin_return_address(0));
2378         spin_lock_irqsave(&cm_core->ht_lock, flags);
2379
2380         if (!refcount_dec_and_test(&cm_node->refcnt)) {
2381                 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
2382                 return;
2383         }
2384         if (cm_node->iwqp) {
2385                 cm_node->iwqp->cm_node = NULL;
2386                 cm_node->iwqp->cm_id = NULL;
2387         }
2388         hash_del_rcu(&cm_node->list);
2389         cm_node->cm_core->stats_nodes_destroyed++;
2390
2391         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
2392
2393         irdma_destroy_connection(cm_node);
2394
2395         kfree_rcu(cm_node, rcu_head);
2396 }
2397
2398 /**
2399  * irdma_handle_fin_pkt - FIN packet received
2400  * @cm_node: connection's node
2401  */
2402 static void irdma_handle_fin_pkt(struct irdma_cm_node *cm_node)
2403 {
2404         switch (cm_node->state) {
2405         case IRDMA_CM_STATE_SYN_RCVD:
2406         case IRDMA_CM_STATE_SYN_SENT:
2407         case IRDMA_CM_STATE_ESTABLISHED:
2408         case IRDMA_CM_STATE_MPAREJ_RCVD:
2409                 cm_node->tcp_cntxt.rcv_nxt++;
2410                 irdma_cleanup_retrans_entry(cm_node);
2411                 cm_node->state = IRDMA_CM_STATE_LAST_ACK;
2412                 irdma_send_fin(cm_node);
2413                 break;
2414         case IRDMA_CM_STATE_MPAREQ_SENT:
2415                 irdma_create_event(cm_node, IRDMA_CM_EVENT_ABORTED);
2416                 cm_node->tcp_cntxt.rcv_nxt++;
2417                 irdma_cleanup_retrans_entry(cm_node);
2418                 cm_node->state = IRDMA_CM_STATE_CLOSED;
2419                 refcount_inc(&cm_node->refcnt);
2420                 irdma_send_reset(cm_node);
2421                 break;
2422         case IRDMA_CM_STATE_FIN_WAIT1:
2423                 cm_node->tcp_cntxt.rcv_nxt++;
2424                 irdma_cleanup_retrans_entry(cm_node);
2425                 cm_node->state = IRDMA_CM_STATE_CLOSING;
2426                 irdma_send_ack(cm_node);
2427                 /*
2428                  * Wait for ACK as this is simultaneous close.
2429                  * After we receive ACK, do not send anything.
2430                  * Just rm the node.
2431                  */
2432                 break;
2433         case IRDMA_CM_STATE_FIN_WAIT2:
2434                 cm_node->tcp_cntxt.rcv_nxt++;
2435                 irdma_cleanup_retrans_entry(cm_node);
2436                 cm_node->state = IRDMA_CM_STATE_TIME_WAIT;
2437                 irdma_send_ack(cm_node);
2438                 irdma_schedule_cm_timer(cm_node, NULL, IRDMA_TIMER_TYPE_CLOSE,
2439                                         1, 0);
2440                 break;
2441         case IRDMA_CM_STATE_TIME_WAIT:
2442                 cm_node->tcp_cntxt.rcv_nxt++;
2443                 irdma_cleanup_retrans_entry(cm_node);
2444                 cm_node->state = IRDMA_CM_STATE_CLOSED;
2445                 irdma_rem_ref_cm_node(cm_node);
2446                 break;
2447         case IRDMA_CM_STATE_OFFLOADED:
2448         default:
2449                 ibdev_dbg(&cm_node->iwdev->ibdev,
2450                           "CM: bad state node state = %d\n", cm_node->state);
2451                 break;
2452         }
2453 }
2454
2455 /**
2456  * irdma_handle_rst_pkt - process received RST packet
2457  * @cm_node: connection's node
2458  * @rbuf: receive buffer
2459  */
2460 static void irdma_handle_rst_pkt(struct irdma_cm_node *cm_node,
2461                                  struct irdma_puda_buf *rbuf)
2462 {
2463         ibdev_dbg(&cm_node->iwdev->ibdev,
2464                   "CM: caller: %pS cm_node=%p state=%d rem_port=0x%04x loc_port=0x%04x rem_addr=%pI4 loc_addr=%pI4\n",
2465                   __builtin_return_address(0), cm_node, cm_node->state,
2466                   cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr,
2467                   cm_node->loc_addr);
2468
2469         irdma_cleanup_retrans_entry(cm_node);
2470         switch (cm_node->state) {
2471         case IRDMA_CM_STATE_SYN_SENT:
2472         case IRDMA_CM_STATE_MPAREQ_SENT:
2473                 switch (cm_node->mpa_frame_rev) {
2474                 case IETF_MPA_V2:
2475                         /* Drop down to MPA_V1*/
2476                         cm_node->mpa_frame_rev = IETF_MPA_V1;
2477                         /* send a syn and goto syn sent state */
2478                         cm_node->state = IRDMA_CM_STATE_SYN_SENT;
2479                         if (irdma_send_syn(cm_node, 0))
2480                                 irdma_active_open_err(cm_node, false);
2481                         break;
2482                 case IETF_MPA_V1:
2483                 default:
2484                         irdma_active_open_err(cm_node, false);
2485                         break;
2486                 }
2487                 break;
2488         case IRDMA_CM_STATE_MPAREQ_RCVD:
2489                 atomic_inc(&cm_node->passive_state);
2490                 break;
2491         case IRDMA_CM_STATE_ESTABLISHED:
2492         case IRDMA_CM_STATE_SYN_RCVD:
2493         case IRDMA_CM_STATE_LISTENING:
2494                 irdma_passive_open_err(cm_node, false);
2495                 break;
2496         case IRDMA_CM_STATE_OFFLOADED:
2497                 irdma_active_open_err(cm_node, false);
2498                 break;
2499         case IRDMA_CM_STATE_CLOSED:
2500                 break;
2501         case IRDMA_CM_STATE_FIN_WAIT2:
2502         case IRDMA_CM_STATE_FIN_WAIT1:
2503         case IRDMA_CM_STATE_LAST_ACK:
2504         case IRDMA_CM_STATE_TIME_WAIT:
2505                 cm_node->state = IRDMA_CM_STATE_CLOSED;
2506                 irdma_rem_ref_cm_node(cm_node);
2507                 break;
2508         default:
2509                 break;
2510         }
2511 }
2512
2513 /**
2514  * irdma_handle_rcv_mpa - Process a recv'd mpa buffer
2515  * @cm_node: connection's node
2516  * @rbuf: receive buffer
2517  */
2518 static void irdma_handle_rcv_mpa(struct irdma_cm_node *cm_node,
2519                                  struct irdma_puda_buf *rbuf)
2520 {
2521         int err;
2522         int datasize = rbuf->datalen;
2523         u8 *dataloc = rbuf->data;
2524
2525         enum irdma_cm_event_type type = IRDMA_CM_EVENT_UNKNOWN;
2526         u32 res_type;
2527
2528         err = irdma_parse_mpa(cm_node, dataloc, &res_type, datasize);
2529         if (err) {
2530                 if (cm_node->state == IRDMA_CM_STATE_MPAREQ_SENT)
2531                         irdma_active_open_err(cm_node, true);
2532                 else
2533                         irdma_passive_open_err(cm_node, true);
2534                 return;
2535         }
2536
2537         switch (cm_node->state) {
2538         case IRDMA_CM_STATE_ESTABLISHED:
2539                 if (res_type == IRDMA_MPA_REQUEST_REJECT)
2540                         ibdev_dbg(&cm_node->iwdev->ibdev,
2541                                   "CM: state for reject\n");
2542                 cm_node->state = IRDMA_CM_STATE_MPAREQ_RCVD;
2543                 type = IRDMA_CM_EVENT_MPA_REQ;
2544                 irdma_send_ack(cm_node); /* ACK received MPA request */
2545                 atomic_set(&cm_node->passive_state,
2546                            IRDMA_PASSIVE_STATE_INDICATED);
2547                 break;
2548         case IRDMA_CM_STATE_MPAREQ_SENT:
2549                 irdma_cleanup_retrans_entry(cm_node);
2550                 if (res_type == IRDMA_MPA_REQUEST_REJECT) {
2551                         type = IRDMA_CM_EVENT_MPA_REJECT;
2552                         cm_node->state = IRDMA_CM_STATE_MPAREJ_RCVD;
2553                 } else {
2554                         type = IRDMA_CM_EVENT_CONNECTED;
2555                         cm_node->state = IRDMA_CM_STATE_OFFLOADED;
2556                 }
2557                 irdma_send_ack(cm_node);
2558                 break;
2559         default:
2560                 ibdev_dbg(&cm_node->iwdev->ibdev,
2561                           "CM: wrong cm_node state =%d\n", cm_node->state);
2562                 break;
2563         }
2564         irdma_create_event(cm_node, type);
2565 }
2566
2567 /**
2568  * irdma_check_syn - Check for error on received syn ack
2569  * @cm_node: connection's node
2570  * @tcph: pointer tcp header
2571  */
2572 static int irdma_check_syn(struct irdma_cm_node *cm_node, struct tcphdr *tcph)
2573 {
2574         if (ntohl(tcph->ack_seq) != cm_node->tcp_cntxt.loc_seq_num) {
2575                 irdma_active_open_err(cm_node, true);
2576                 return 1;
2577         }
2578
2579         return 0;
2580 }
2581
2582 /**
2583  * irdma_check_seq - check seq numbers if OK
2584  * @cm_node: connection's node
2585  * @tcph: pointer tcp header
2586  */
2587 static int irdma_check_seq(struct irdma_cm_node *cm_node, struct tcphdr *tcph)
2588 {
2589         u32 seq;
2590         u32 ack_seq;
2591         u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
2592         u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
2593         u32 rcv_wnd;
2594         int err = 0;
2595
2596         seq = ntohl(tcph->seq);
2597         ack_seq = ntohl(tcph->ack_seq);
2598         rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
2599         if (ack_seq != loc_seq_num ||
2600             !between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
2601                 err = -1;
2602         if (err)
2603                 ibdev_dbg(&cm_node->iwdev->ibdev,
2604                           "CM: seq number err\n");
2605
2606         return err;
2607 }
2608
2609 void irdma_add_conn_est_qh(struct irdma_cm_node *cm_node)
2610 {
2611         struct irdma_cm_info nfo;
2612
2613         irdma_get_addr_info(cm_node, &nfo);
2614         nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id;
2615         irdma_manage_qhash(cm_node->iwdev, &nfo,
2616                            IRDMA_QHASH_TYPE_TCP_ESTABLISHED,
2617                            IRDMA_QHASH_MANAGE_TYPE_ADD,
2618                            cm_node, false);
2619         cm_node->qhash_set = true;
2620 }
2621
2622 /**
2623  * irdma_handle_syn_pkt - is for Passive node
2624  * @cm_node: connection's node
2625  * @rbuf: receive buffer
2626  */
2627 static void irdma_handle_syn_pkt(struct irdma_cm_node *cm_node,
2628                                  struct irdma_puda_buf *rbuf)
2629 {
2630         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2631         int err;
2632         u32 inc_sequence;
2633         int optionsize;
2634
2635         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2636         inc_sequence = ntohl(tcph->seq);
2637
2638         switch (cm_node->state) {
2639         case IRDMA_CM_STATE_SYN_SENT:
2640         case IRDMA_CM_STATE_MPAREQ_SENT:
2641                 /* Rcvd syn on active open connection */
2642                 irdma_active_open_err(cm_node, 1);
2643                 break;
2644         case IRDMA_CM_STATE_LISTENING:
2645                 /* Passive OPEN */
2646                 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
2647                     cm_node->listener->backlog) {
2648                         cm_node->cm_core->stats_backlog_drops++;
2649                         irdma_passive_open_err(cm_node, false);
2650                         break;
2651                 }
2652                 err = irdma_handle_tcp_options(cm_node, tcph, optionsize, 1);
2653                 if (err) {
2654                         irdma_passive_open_err(cm_node, false);
2655                         /* drop pkt */
2656                         break;
2657                 }
2658                 err = cm_node->cm_core->cm_create_ah(cm_node, false);
2659                 if (err) {
2660                         irdma_passive_open_err(cm_node, false);
2661                         /* drop pkt */
2662                         break;
2663                 }
2664                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2665                 cm_node->accept_pend = 1;
2666                 atomic_inc(&cm_node->listener->pend_accepts_cnt);
2667
2668                 cm_node->state = IRDMA_CM_STATE_SYN_RCVD;
2669                 break;
2670         case IRDMA_CM_STATE_CLOSED:
2671                 irdma_cleanup_retrans_entry(cm_node);
2672                 refcount_inc(&cm_node->refcnt);
2673                 irdma_send_reset(cm_node);
2674                 break;
2675         case IRDMA_CM_STATE_OFFLOADED:
2676         case IRDMA_CM_STATE_ESTABLISHED:
2677         case IRDMA_CM_STATE_FIN_WAIT1:
2678         case IRDMA_CM_STATE_FIN_WAIT2:
2679         case IRDMA_CM_STATE_MPAREQ_RCVD:
2680         case IRDMA_CM_STATE_LAST_ACK:
2681         case IRDMA_CM_STATE_CLOSING:
2682         case IRDMA_CM_STATE_UNKNOWN:
2683         default:
2684                 break;
2685         }
2686 }
2687
2688 /**
2689  * irdma_handle_synack_pkt - Process SYN+ACK packet (active side)
2690  * @cm_node: connection's node
2691  * @rbuf: receive buffer
2692  */
2693 static void irdma_handle_synack_pkt(struct irdma_cm_node *cm_node,
2694                                     struct irdma_puda_buf *rbuf)
2695 {
2696         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2697         int err;
2698         u32 inc_sequence;
2699         int optionsize;
2700
2701         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2702         inc_sequence = ntohl(tcph->seq);
2703         switch (cm_node->state) {
2704         case IRDMA_CM_STATE_SYN_SENT:
2705                 irdma_cleanup_retrans_entry(cm_node);
2706                 /* active open */
2707                 if (irdma_check_syn(cm_node, tcph)) {
2708                         ibdev_dbg(&cm_node->iwdev->ibdev,
2709                                   "CM: check syn fail\n");
2710                         return;
2711                 }
2712                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2713                 /* setup options */
2714                 err = irdma_handle_tcp_options(cm_node, tcph, optionsize, 0);
2715                 if (err) {
2716                         ibdev_dbg(&cm_node->iwdev->ibdev,
2717                                   "CM: cm_node=%p tcp_options failed\n",
2718                                   cm_node);
2719                         break;
2720                 }
2721                 irdma_cleanup_retrans_entry(cm_node);
2722                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2723                 irdma_send_ack(cm_node); /* ACK  for the syn_ack */
2724                 err = irdma_send_mpa_request(cm_node);
2725                 if (err) {
2726                         ibdev_dbg(&cm_node->iwdev->ibdev,
2727                                   "CM: cm_node=%p irdma_send_mpa_request failed\n",
2728                                   cm_node);
2729                         break;
2730                 }
2731                 cm_node->state = IRDMA_CM_STATE_MPAREQ_SENT;
2732                 break;
2733         case IRDMA_CM_STATE_MPAREQ_RCVD:
2734                 irdma_passive_open_err(cm_node, true);
2735                 break;
2736         case IRDMA_CM_STATE_LISTENING:
2737                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2738                 irdma_cleanup_retrans_entry(cm_node);
2739                 cm_node->state = IRDMA_CM_STATE_CLOSED;
2740                 irdma_send_reset(cm_node);
2741                 break;
2742         case IRDMA_CM_STATE_CLOSED:
2743                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2744                 irdma_cleanup_retrans_entry(cm_node);
2745                 refcount_inc(&cm_node->refcnt);
2746                 irdma_send_reset(cm_node);
2747                 break;
2748         case IRDMA_CM_STATE_ESTABLISHED:
2749         case IRDMA_CM_STATE_FIN_WAIT1:
2750         case IRDMA_CM_STATE_FIN_WAIT2:
2751         case IRDMA_CM_STATE_LAST_ACK:
2752         case IRDMA_CM_STATE_OFFLOADED:
2753         case IRDMA_CM_STATE_CLOSING:
2754         case IRDMA_CM_STATE_UNKNOWN:
2755         case IRDMA_CM_STATE_MPAREQ_SENT:
2756         default:
2757                 break;
2758         }
2759 }
2760
2761 /**
2762  * irdma_handle_ack_pkt - process packet with ACK
2763  * @cm_node: connection's node
2764  * @rbuf: receive buffer
2765  */
2766 static int irdma_handle_ack_pkt(struct irdma_cm_node *cm_node,
2767                                 struct irdma_puda_buf *rbuf)
2768 {
2769         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2770         u32 inc_sequence;
2771         int ret;
2772         int optionsize;
2773         u32 datasize = rbuf->datalen;
2774
2775         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2776
2777         if (irdma_check_seq(cm_node, tcph))
2778                 return -EINVAL;
2779
2780         inc_sequence = ntohl(tcph->seq);
2781         switch (cm_node->state) {
2782         case IRDMA_CM_STATE_SYN_RCVD:
2783                 irdma_cleanup_retrans_entry(cm_node);
2784                 ret = irdma_handle_tcp_options(cm_node, tcph, optionsize, 1);
2785                 if (ret)
2786                         return ret;
2787                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2788                 cm_node->state = IRDMA_CM_STATE_ESTABLISHED;
2789                 if (datasize) {
2790                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2791                         irdma_handle_rcv_mpa(cm_node, rbuf);
2792                 }
2793                 break;
2794         case IRDMA_CM_STATE_ESTABLISHED:
2795                 irdma_cleanup_retrans_entry(cm_node);
2796                 if (datasize) {
2797                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2798                         irdma_handle_rcv_mpa(cm_node, rbuf);
2799                 }
2800                 break;
2801         case IRDMA_CM_STATE_MPAREQ_SENT:
2802                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2803                 if (datasize) {
2804                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2805                         cm_node->ack_rcvd = false;
2806                         irdma_handle_rcv_mpa(cm_node, rbuf);
2807                 } else {
2808                         cm_node->ack_rcvd = true;
2809                 }
2810                 break;
2811         case IRDMA_CM_STATE_LISTENING:
2812                 irdma_cleanup_retrans_entry(cm_node);
2813                 cm_node->state = IRDMA_CM_STATE_CLOSED;
2814                 irdma_send_reset(cm_node);
2815                 break;
2816         case IRDMA_CM_STATE_CLOSED:
2817                 irdma_cleanup_retrans_entry(cm_node);
2818                 refcount_inc(&cm_node->refcnt);
2819                 irdma_send_reset(cm_node);
2820                 break;
2821         case IRDMA_CM_STATE_LAST_ACK:
2822         case IRDMA_CM_STATE_CLOSING:
2823                 irdma_cleanup_retrans_entry(cm_node);
2824                 cm_node->state = IRDMA_CM_STATE_CLOSED;
2825                 irdma_rem_ref_cm_node(cm_node);
2826                 break;
2827         case IRDMA_CM_STATE_FIN_WAIT1:
2828                 irdma_cleanup_retrans_entry(cm_node);
2829                 cm_node->state = IRDMA_CM_STATE_FIN_WAIT2;
2830                 break;
2831         case IRDMA_CM_STATE_SYN_SENT:
2832         case IRDMA_CM_STATE_FIN_WAIT2:
2833         case IRDMA_CM_STATE_OFFLOADED:
2834         case IRDMA_CM_STATE_MPAREQ_RCVD:
2835         case IRDMA_CM_STATE_UNKNOWN:
2836         default:
2837                 irdma_cleanup_retrans_entry(cm_node);
2838                 break;
2839         }
2840
2841         return 0;
2842 }
2843
2844 /**
2845  * irdma_process_pkt - process cm packet
2846  * @cm_node: connection's node
2847  * @rbuf: receive buffer
2848  */
2849 static void irdma_process_pkt(struct irdma_cm_node *cm_node,
2850                               struct irdma_puda_buf *rbuf)
2851 {
2852         enum irdma_tcpip_pkt_type pkt_type = IRDMA_PKT_TYPE_UNKNOWN;
2853         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2854         u32 fin_set = 0;
2855         int err;
2856
2857         if (tcph->rst) {
2858                 pkt_type = IRDMA_PKT_TYPE_RST;
2859         } else if (tcph->syn) {
2860                 pkt_type = IRDMA_PKT_TYPE_SYN;
2861                 if (tcph->ack)
2862                         pkt_type = IRDMA_PKT_TYPE_SYNACK;
2863         } else if (tcph->ack) {
2864                 pkt_type = IRDMA_PKT_TYPE_ACK;
2865         }
2866         if (tcph->fin)
2867                 fin_set = 1;
2868
2869         switch (pkt_type) {
2870         case IRDMA_PKT_TYPE_SYN:
2871                 irdma_handle_syn_pkt(cm_node, rbuf);
2872                 break;
2873         case IRDMA_PKT_TYPE_SYNACK:
2874                 irdma_handle_synack_pkt(cm_node, rbuf);
2875                 break;
2876         case IRDMA_PKT_TYPE_ACK:
2877                 err = irdma_handle_ack_pkt(cm_node, rbuf);
2878                 if (fin_set && !err)
2879                         irdma_handle_fin_pkt(cm_node);
2880                 break;
2881         case IRDMA_PKT_TYPE_RST:
2882                 irdma_handle_rst_pkt(cm_node, rbuf);
2883                 break;
2884         default:
2885                 if (fin_set &&
2886                     (!irdma_check_seq(cm_node, (struct tcphdr *)rbuf->tcph)))
2887                         irdma_handle_fin_pkt(cm_node);
2888                 break;
2889         }
2890 }
2891
2892 /**
2893  * irdma_make_listen_node - create a listen node with params
2894  * @cm_core: cm's core
2895  * @iwdev: iwarp device structure
2896  * @cm_info: quad info for connection
2897  */
2898 static struct irdma_cm_listener *
2899 irdma_make_listen_node(struct irdma_cm_core *cm_core,
2900                        struct irdma_device *iwdev,
2901                        struct irdma_cm_info *cm_info)
2902 {
2903         struct irdma_cm_listener *listener;
2904         unsigned long flags;
2905
2906         /* cannot have multiple matching listeners */
2907         listener =
2908                 irdma_find_listener(cm_core, cm_info->loc_addr, cm_info->ipv4,
2909                                     cm_info->loc_port, cm_info->vlan_id,
2910                                     IRDMA_CM_LISTENER_EITHER_STATE);
2911         if (listener &&
2912             listener->listener_state == IRDMA_CM_LISTENER_ACTIVE_STATE) {
2913                 refcount_dec(&listener->refcnt);
2914                 return NULL;
2915         }
2916
2917         if (!listener) {
2918                 /* create a CM listen node
2919                  * 1/2 node to compare incoming traffic to
2920                  */
2921                 listener = kzalloc(sizeof(*listener), GFP_KERNEL);
2922                 if (!listener)
2923                         return NULL;
2924                 cm_core->stats_listen_nodes_created++;
2925                 memcpy(listener->loc_addr, cm_info->loc_addr,
2926                        sizeof(listener->loc_addr));
2927                 listener->loc_port = cm_info->loc_port;
2928
2929                 INIT_LIST_HEAD(&listener->child_listen_list);
2930
2931                 refcount_set(&listener->refcnt, 1);
2932         } else {
2933                 listener->reused_node = 1;
2934         }
2935
2936         listener->cm_id = cm_info->cm_id;
2937         listener->ipv4 = cm_info->ipv4;
2938         listener->vlan_id = cm_info->vlan_id;
2939         atomic_set(&listener->pend_accepts_cnt, 0);
2940         listener->cm_core = cm_core;
2941         listener->iwdev = iwdev;
2942
2943         listener->backlog = cm_info->backlog;
2944         listener->listener_state = IRDMA_CM_LISTENER_ACTIVE_STATE;
2945
2946         if (!listener->reused_node) {
2947                 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2948                 list_add(&listener->list, &cm_core->listen_list);
2949                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2950         }
2951
2952         return listener;
2953 }
2954
2955 /**
2956  * irdma_create_cm_node - make a connection node with params
2957  * @cm_core: cm's core
2958  * @iwdev: iwarp device structure
2959  * @conn_param: connection parameters
2960  * @cm_info: quad info for connection
2961  * @caller_cm_node: pointer to cm_node structure to return
2962  */
2963 static int irdma_create_cm_node(struct irdma_cm_core *cm_core,
2964                                 struct irdma_device *iwdev,
2965                                 struct iw_cm_conn_param *conn_param,
2966                                 struct irdma_cm_info *cm_info,
2967                                 struct irdma_cm_node **caller_cm_node)
2968 {
2969         struct irdma_cm_node *cm_node;
2970         u16 private_data_len = conn_param->private_data_len;
2971         const void *private_data = conn_param->private_data;
2972
2973         /* create a CM connection node */
2974         cm_node = irdma_make_cm_node(cm_core, iwdev, cm_info, NULL);
2975         if (!cm_node)
2976                 return -ENOMEM;
2977
2978         /* set our node side to client (active) side */
2979         cm_node->tcp_cntxt.client = 1;
2980         cm_node->tcp_cntxt.rcv_wscale = IRDMA_CM_DEFAULT_RCV_WND_SCALE;
2981
2982         irdma_record_ird_ord(cm_node, conn_param->ird, conn_param->ord);
2983
2984         cm_node->pdata.size = private_data_len;
2985         cm_node->pdata.addr = cm_node->pdata_buf;
2986
2987         memcpy(cm_node->pdata_buf, private_data, private_data_len);
2988         *caller_cm_node = cm_node;
2989
2990         return 0;
2991 }
2992
2993 /**
2994  * irdma_cm_reject - reject and teardown a connection
2995  * @cm_node: connection's node
2996  * @pdata: ptr to private data for reject
2997  * @plen: size of private data
2998  */
2999 static int irdma_cm_reject(struct irdma_cm_node *cm_node, const void *pdata,
3000                            u8 plen)
3001 {
3002         int ret;
3003         int passive_state;
3004
3005         if (cm_node->tcp_cntxt.client)
3006                 return 0;
3007
3008         irdma_cleanup_retrans_entry(cm_node);
3009
3010         passive_state = atomic_add_return(1, &cm_node->passive_state);
3011         if (passive_state == IRDMA_SEND_RESET_EVENT) {
3012                 cm_node->state = IRDMA_CM_STATE_CLOSED;
3013                 irdma_rem_ref_cm_node(cm_node);
3014                 return 0;
3015         }
3016
3017         if (cm_node->state == IRDMA_CM_STATE_LISTENER_DESTROYED) {
3018                 irdma_rem_ref_cm_node(cm_node);
3019                 return 0;
3020         }
3021
3022         ret = irdma_send_mpa_reject(cm_node, pdata, plen);
3023         if (!ret)
3024                 return 0;
3025
3026         cm_node->state = IRDMA_CM_STATE_CLOSED;
3027         if (irdma_send_reset(cm_node))
3028                 ibdev_dbg(&cm_node->iwdev->ibdev,
3029                           "CM: send reset failed\n");
3030
3031         return ret;
3032 }
3033
3034 /**
3035  * irdma_cm_close - close of cm connection
3036  * @cm_node: connection's node
3037  */
3038 static int irdma_cm_close(struct irdma_cm_node *cm_node)
3039 {
3040         switch (cm_node->state) {
3041         case IRDMA_CM_STATE_SYN_RCVD:
3042         case IRDMA_CM_STATE_SYN_SENT:
3043         case IRDMA_CM_STATE_ONE_SIDE_ESTABLISHED:
3044         case IRDMA_CM_STATE_ESTABLISHED:
3045         case IRDMA_CM_STATE_ACCEPTING:
3046         case IRDMA_CM_STATE_MPAREQ_SENT:
3047         case IRDMA_CM_STATE_MPAREQ_RCVD:
3048                 irdma_cleanup_retrans_entry(cm_node);
3049                 irdma_send_reset(cm_node);
3050                 break;
3051         case IRDMA_CM_STATE_CLOSE_WAIT:
3052                 cm_node->state = IRDMA_CM_STATE_LAST_ACK;
3053                 irdma_send_fin(cm_node);
3054                 break;
3055         case IRDMA_CM_STATE_FIN_WAIT1:
3056         case IRDMA_CM_STATE_FIN_WAIT2:
3057         case IRDMA_CM_STATE_LAST_ACK:
3058         case IRDMA_CM_STATE_TIME_WAIT:
3059         case IRDMA_CM_STATE_CLOSING:
3060                 return -EINVAL;
3061         case IRDMA_CM_STATE_LISTENING:
3062                 irdma_cleanup_retrans_entry(cm_node);
3063                 irdma_send_reset(cm_node);
3064                 break;
3065         case IRDMA_CM_STATE_MPAREJ_RCVD:
3066         case IRDMA_CM_STATE_UNKNOWN:
3067         case IRDMA_CM_STATE_INITED:
3068         case IRDMA_CM_STATE_CLOSED:
3069         case IRDMA_CM_STATE_LISTENER_DESTROYED:
3070                 irdma_rem_ref_cm_node(cm_node);
3071                 break;
3072         case IRDMA_CM_STATE_OFFLOADED:
3073                 if (cm_node->send_entry)
3074                         ibdev_dbg(&cm_node->iwdev->ibdev,
3075                                   "CM: CM send_entry in OFFLOADED state\n");
3076                 irdma_rem_ref_cm_node(cm_node);
3077                 break;
3078         }
3079
3080         return 0;
3081 }
3082
3083 /**
3084  * irdma_receive_ilq - recv an ETHERNET packet, and process it
3085  * through CM
3086  * @vsi: VSI structure of dev
3087  * @rbuf: receive buffer
3088  */
3089 void irdma_receive_ilq(struct irdma_sc_vsi *vsi, struct irdma_puda_buf *rbuf)
3090 {
3091         struct irdma_cm_node *cm_node;
3092         struct irdma_cm_listener *listener;
3093         struct iphdr *iph;
3094         struct ipv6hdr *ip6h;
3095         struct tcphdr *tcph;
3096         struct irdma_cm_info cm_info = {};
3097         struct irdma_device *iwdev = vsi->back_vsi;
3098         struct irdma_cm_core *cm_core = &iwdev->cm_core;
3099         struct vlan_ethhdr *ethh;
3100         u16 vtag;
3101
3102         /* if vlan, then maclen = 18 else 14 */
3103         iph = (struct iphdr *)rbuf->iph;
3104         print_hex_dump_debug("ILQ: RECEIVE ILQ BUFFER", DUMP_PREFIX_OFFSET,
3105                              16, 8, rbuf->mem.va, rbuf->totallen, false);
3106         if (iwdev->rf->sc_dev.hw_attrs.uk_attrs.hw_rev >= IRDMA_GEN_2) {
3107                 if (rbuf->vlan_valid) {
3108                         vtag = rbuf->vlan_id;
3109                         cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >>
3110                                            VLAN_PRIO_SHIFT;
3111                         cm_info.vlan_id = vtag & VLAN_VID_MASK;
3112                 } else {
3113                         cm_info.vlan_id = 0xFFFF;
3114                 }
3115         } else {
3116                 ethh = rbuf->mem.va;
3117
3118                 if (ethh->h_vlan_proto == htons(ETH_P_8021Q)) {
3119                         vtag = ntohs(ethh->h_vlan_TCI);
3120                         cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >>
3121                                            VLAN_PRIO_SHIFT;
3122                         cm_info.vlan_id = vtag & VLAN_VID_MASK;
3123                         ibdev_dbg(&cm_core->iwdev->ibdev,
3124                                   "CM: vlan_id=%d\n", cm_info.vlan_id);
3125                 } else {
3126                         cm_info.vlan_id = 0xFFFF;
3127                 }
3128         }
3129         tcph = (struct tcphdr *)rbuf->tcph;
3130
3131         if (rbuf->ipv4) {
3132                 cm_info.loc_addr[0] = ntohl(iph->daddr);
3133                 cm_info.rem_addr[0] = ntohl(iph->saddr);
3134                 cm_info.ipv4 = true;
3135                 cm_info.tos = iph->tos;
3136         } else {
3137                 ip6h = (struct ipv6hdr *)rbuf->iph;
3138                 irdma_copy_ip_ntohl(cm_info.loc_addr,
3139                                     ip6h->daddr.in6_u.u6_addr32);
3140                 irdma_copy_ip_ntohl(cm_info.rem_addr,
3141                                     ip6h->saddr.in6_u.u6_addr32);
3142                 cm_info.ipv4 = false;
3143                 cm_info.tos = (ip6h->priority << 4) | (ip6h->flow_lbl[0] >> 4);
3144         }
3145         cm_info.loc_port = ntohs(tcph->dest);
3146         cm_info.rem_port = ntohs(tcph->source);
3147         cm_node = irdma_find_node(cm_core, cm_info.rem_port, cm_info.rem_addr,
3148                                   cm_info.loc_port, cm_info.loc_addr, cm_info.vlan_id);
3149
3150         if (!cm_node) {
3151                 /* Only type of packet accepted are for the
3152                  * PASSIVE open (syn only)
3153                  */
3154                 if (!tcph->syn || tcph->ack)
3155                         return;
3156
3157                 listener = irdma_find_listener(cm_core,
3158                                                cm_info.loc_addr,
3159                                                cm_info.ipv4,
3160                                                cm_info.loc_port,
3161                                                cm_info.vlan_id,
3162                                                IRDMA_CM_LISTENER_ACTIVE_STATE);
3163                 if (!listener) {
3164                         cm_info.cm_id = NULL;
3165                         ibdev_dbg(&cm_core->iwdev->ibdev,
3166                                   "CM: no listener found\n");
3167                         return;
3168                 }
3169
3170                 cm_info.cm_id = listener->cm_id;
3171                 cm_node = irdma_make_cm_node(cm_core, iwdev, &cm_info,
3172                                              listener);
3173                 if (!cm_node) {
3174                         ibdev_dbg(&cm_core->iwdev->ibdev,
3175                                   "CM: allocate node failed\n");
3176                         refcount_dec(&listener->refcnt);
3177                         return;
3178                 }
3179
3180                 if (!tcph->rst && !tcph->fin) {
3181                         cm_node->state = IRDMA_CM_STATE_LISTENING;
3182                 } else {
3183                         irdma_rem_ref_cm_node(cm_node);
3184                         return;
3185                 }
3186
3187                 refcount_inc(&cm_node->refcnt);
3188         } else if (cm_node->state == IRDMA_CM_STATE_OFFLOADED) {
3189                 irdma_rem_ref_cm_node(cm_node);
3190                 return;
3191         }
3192
3193         irdma_process_pkt(cm_node, rbuf);
3194         irdma_rem_ref_cm_node(cm_node);
3195 }
3196
3197 static int irdma_add_qh(struct irdma_cm_node *cm_node, bool active)
3198 {
3199         if (!active)
3200                 irdma_add_conn_est_qh(cm_node);
3201         return 0;
3202 }
3203
3204 static void irdma_cm_free_ah_nop(struct irdma_cm_node *cm_node)
3205 {
3206 }
3207
3208 /**
3209  * irdma_setup_cm_core - setup top level instance of a cm core
3210  * @iwdev: iwarp device structure
3211  * @rdma_ver: HW version
3212  */
3213 int irdma_setup_cm_core(struct irdma_device *iwdev, u8 rdma_ver)
3214 {
3215         struct irdma_cm_core *cm_core = &iwdev->cm_core;
3216
3217         cm_core->iwdev = iwdev;
3218         cm_core->dev = &iwdev->rf->sc_dev;
3219
3220         /* Handles CM event work items send to Iwarp core */
3221         cm_core->event_wq = alloc_ordered_workqueue("iwarp-event-wq", 0);
3222         if (!cm_core->event_wq)
3223                 return -ENOMEM;
3224
3225         INIT_LIST_HEAD(&cm_core->listen_list);
3226
3227         timer_setup(&cm_core->tcp_timer, irdma_cm_timer_tick, 0);
3228
3229         spin_lock_init(&cm_core->ht_lock);
3230         spin_lock_init(&cm_core->listen_list_lock);
3231         spin_lock_init(&cm_core->apbvt_lock);
3232         switch (rdma_ver) {
3233         case IRDMA_GEN_1:
3234                 cm_core->form_cm_frame = irdma_form_uda_cm_frame;
3235                 cm_core->cm_create_ah = irdma_add_qh;
3236                 cm_core->cm_free_ah = irdma_cm_free_ah_nop;
3237                 break;
3238         case IRDMA_GEN_2:
3239         default:
3240                 cm_core->form_cm_frame = irdma_form_ah_cm_frame;
3241                 cm_core->cm_create_ah = irdma_cm_create_ah;
3242                 cm_core->cm_free_ah = irdma_cm_free_ah;
3243         }
3244
3245         return 0;
3246 }
3247
3248 /**
3249  * irdma_cleanup_cm_core - deallocate a top level instance of a
3250  * cm core
3251  * @cm_core: cm's core
3252  */
3253 void irdma_cleanup_cm_core(struct irdma_cm_core *cm_core)
3254 {
3255         if (!cm_core)
3256                 return;
3257
3258         del_timer_sync(&cm_core->tcp_timer);
3259
3260         destroy_workqueue(cm_core->event_wq);
3261         cm_core->dev->ws_reset(&cm_core->iwdev->vsi);
3262 }
3263
3264 /**
3265  * irdma_init_tcp_ctx - setup qp context
3266  * @cm_node: connection's node
3267  * @tcp_info: offload info for tcp
3268  * @iwqp: associate qp for the connection
3269  */
3270 static void irdma_init_tcp_ctx(struct irdma_cm_node *cm_node,
3271                                struct irdma_tcp_offload_info *tcp_info,
3272                                struct irdma_qp *iwqp)
3273 {
3274         tcp_info->ipv4 = cm_node->ipv4;
3275         tcp_info->drop_ooo_seg = !iwqp->iwdev->iw_ooo;
3276         tcp_info->wscale = true;
3277         tcp_info->ignore_tcp_opt = true;
3278         tcp_info->ignore_tcp_uns_opt = true;
3279         tcp_info->no_nagle = false;
3280
3281         tcp_info->ttl = IRDMA_DEFAULT_TTL;
3282         tcp_info->rtt_var = IRDMA_DEFAULT_RTT_VAR;
3283         tcp_info->ss_thresh = IRDMA_DEFAULT_SS_THRESH;
3284         tcp_info->rexmit_thresh = IRDMA_DEFAULT_REXMIT_THRESH;
3285
3286         tcp_info->tcp_state = IRDMA_TCP_STATE_ESTABLISHED;
3287         tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale;
3288         tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale;
3289
3290         tcp_info->snd_nxt = cm_node->tcp_cntxt.loc_seq_num;
3291         tcp_info->snd_wnd = cm_node->tcp_cntxt.snd_wnd;
3292         tcp_info->rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
3293         tcp_info->snd_max = cm_node->tcp_cntxt.loc_seq_num;
3294
3295         tcp_info->snd_una = cm_node->tcp_cntxt.loc_seq_num;
3296         tcp_info->cwnd = 2 * cm_node->tcp_cntxt.mss;
3297         tcp_info->snd_wl1 = cm_node->tcp_cntxt.rcv_nxt;
3298         tcp_info->snd_wl2 = cm_node->tcp_cntxt.loc_seq_num;
3299         tcp_info->max_snd_window = cm_node->tcp_cntxt.max_snd_wnd;
3300         tcp_info->rcv_wnd = cm_node->tcp_cntxt.rcv_wnd
3301                             << cm_node->tcp_cntxt.rcv_wscale;
3302
3303         tcp_info->flow_label = 0;
3304         tcp_info->snd_mss = (u32)cm_node->tcp_cntxt.mss;
3305         tcp_info->tos = cm_node->tos;
3306         if (cm_node->vlan_id < VLAN_N_VID) {
3307                 tcp_info->insert_vlan_tag = true;
3308                 tcp_info->vlan_tag = cm_node->vlan_id;
3309                 tcp_info->vlan_tag |= cm_node->user_pri << VLAN_PRIO_SHIFT;
3310         }
3311         if (cm_node->ipv4) {
3312                 tcp_info->src_port = cm_node->loc_port;
3313                 tcp_info->dst_port = cm_node->rem_port;
3314
3315                 tcp_info->dest_ip_addr[3] = cm_node->rem_addr[0];
3316                 tcp_info->local_ipaddr[3] = cm_node->loc_addr[0];
3317                 tcp_info->arp_idx = (u16)irdma_arp_table(iwqp->iwdev->rf,
3318                                                          &tcp_info->dest_ip_addr[3],
3319                                                          true, NULL,
3320                                                          IRDMA_ARP_RESOLVE);
3321         } else {
3322                 tcp_info->src_port = cm_node->loc_port;
3323                 tcp_info->dst_port = cm_node->rem_port;
3324                 memcpy(tcp_info->dest_ip_addr, cm_node->rem_addr,
3325                        sizeof(tcp_info->dest_ip_addr));
3326                 memcpy(tcp_info->local_ipaddr, cm_node->loc_addr,
3327                        sizeof(tcp_info->local_ipaddr));
3328
3329                 tcp_info->arp_idx = (u16)irdma_arp_table(iwqp->iwdev->rf,
3330                                                          &tcp_info->dest_ip_addr[0],
3331                                                          false, NULL,
3332                                                          IRDMA_ARP_RESOLVE);
3333         }
3334 }
3335
3336 /**
3337  * irdma_cm_init_tsa_conn - setup qp for RTS
3338  * @iwqp: associate qp for the connection
3339  * @cm_node: connection's node
3340  */
3341 static void irdma_cm_init_tsa_conn(struct irdma_qp *iwqp,
3342                                    struct irdma_cm_node *cm_node)
3343 {
3344         struct irdma_iwarp_offload_info *iwarp_info;
3345         struct irdma_qp_host_ctx_info *ctx_info;
3346
3347         iwarp_info = &iwqp->iwarp_info;
3348         ctx_info = &iwqp->ctx_info;
3349
3350         ctx_info->tcp_info = &iwqp->tcp_info;
3351         ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id;
3352         ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id;
3353
3354         iwarp_info->ord_size = cm_node->ord_size;
3355         iwarp_info->ird_size = cm_node->ird_size;
3356         iwarp_info->rd_en = true;
3357         iwarp_info->rdmap_ver = 1;
3358         iwarp_info->ddp_ver = 1;
3359         iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id;
3360
3361         ctx_info->tcp_info_valid = true;
3362         ctx_info->iwarp_info_valid = true;
3363         ctx_info->user_pri = cm_node->user_pri;
3364
3365         irdma_init_tcp_ctx(cm_node, &iwqp->tcp_info, iwqp);
3366         if (cm_node->snd_mark_en) {
3367                 iwarp_info->snd_mark_en = true;
3368                 iwarp_info->snd_mark_offset = (iwqp->tcp_info.snd_nxt & SNDMARKER_SEQNMASK) +
3369                                                cm_node->lsmm_size;
3370         }
3371
3372         cm_node->state = IRDMA_CM_STATE_OFFLOADED;
3373         iwqp->tcp_info.tcp_state = IRDMA_TCP_STATE_ESTABLISHED;
3374         iwqp->tcp_info.src_mac_addr_idx = iwqp->iwdev->mac_ip_table_idx;
3375
3376         if (cm_node->rcv_mark_en) {
3377                 iwarp_info->rcv_mark_en = true;
3378                 iwarp_info->align_hdrs = true;
3379         }
3380
3381         irdma_sc_qp_setctx(&iwqp->sc_qp, iwqp->host_ctx.va, ctx_info);
3382
3383         /* once tcp_info is set, no need to do it again */
3384         ctx_info->tcp_info_valid = false;
3385         ctx_info->iwarp_info_valid = false;
3386 }
3387
3388 /**
3389  * irdma_cm_disconn - when a connection is being closed
3390  * @iwqp: associated qp for the connection
3391  */
3392 void irdma_cm_disconn(struct irdma_qp *iwqp)
3393 {
3394         struct irdma_device *iwdev = iwqp->iwdev;
3395         struct disconn_work *work;
3396         unsigned long flags;
3397
3398         work = kzalloc(sizeof(*work), GFP_ATOMIC);
3399         if (!work)
3400                 return;
3401
3402         spin_lock_irqsave(&iwdev->rf->qptable_lock, flags);
3403         if (!iwdev->rf->qp_table[iwqp->ibqp.qp_num]) {
3404                 spin_unlock_irqrestore(&iwdev->rf->qptable_lock, flags);
3405                 ibdev_dbg(&iwdev->ibdev,
3406                           "CM: qp_id %d is already freed\n",
3407                           iwqp->ibqp.qp_num);
3408                 kfree(work);
3409                 return;
3410         }
3411         irdma_qp_add_ref(&iwqp->ibqp);
3412         spin_unlock_irqrestore(&iwdev->rf->qptable_lock, flags);
3413
3414         work->iwqp = iwqp;
3415         INIT_WORK(&work->work, irdma_disconnect_worker);
3416         queue_work(iwdev->cleanup_wq, &work->work);
3417 }
3418
3419 /**
3420  * irdma_qp_disconnect - free qp and close cm
3421  * @iwqp: associate qp for the connection
3422  */
3423 static void irdma_qp_disconnect(struct irdma_qp *iwqp)
3424 {
3425         struct irdma_device *iwdev = iwqp->iwdev;
3426
3427         iwqp->active_conn = 0;
3428         /* close the CM node down if it is still active */
3429         ibdev_dbg(&iwdev->ibdev, "CM: Call close API\n");
3430         irdma_cm_close(iwqp->cm_node);
3431 }
3432
3433 /**
3434  * irdma_cm_disconn_true - called by worker thread to disconnect qp
3435  * @iwqp: associate qp for the connection
3436  */
3437 static void irdma_cm_disconn_true(struct irdma_qp *iwqp)
3438 {
3439         struct iw_cm_id *cm_id;
3440         struct irdma_device *iwdev;
3441         struct irdma_sc_qp *qp = &iwqp->sc_qp;
3442         u16 last_ae;
3443         u8 original_hw_tcp_state;
3444         u8 original_ibqp_state;
3445         int disconn_status = 0;
3446         int issue_disconn = 0;
3447         int issue_close = 0;
3448         int issue_flush = 0;
3449         unsigned long flags;
3450         int err;
3451
3452         iwdev = iwqp->iwdev;
3453         spin_lock_irqsave(&iwqp->lock, flags);
3454         if (rdma_protocol_roce(&iwdev->ibdev, 1)) {
3455                 struct ib_qp_attr attr;
3456
3457                 if (iwqp->flush_issued || iwqp->sc_qp.qp_uk.destroy_pending) {
3458                         spin_unlock_irqrestore(&iwqp->lock, flags);
3459                         return;
3460                 }
3461
3462                 spin_unlock_irqrestore(&iwqp->lock, flags);
3463
3464                 attr.qp_state = IB_QPS_ERR;
3465                 irdma_modify_qp_roce(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
3466                 irdma_ib_qp_event(iwqp, qp->event_type);
3467                 return;
3468         }
3469
3470         cm_id = iwqp->cm_id;
3471         original_hw_tcp_state = iwqp->hw_tcp_state;
3472         original_ibqp_state = iwqp->ibqp_state;
3473         last_ae = iwqp->last_aeq;
3474
3475         if (qp->term_flags) {
3476                 issue_disconn = 1;
3477                 issue_close = 1;
3478                 iwqp->cm_id = NULL;
3479                 irdma_terminate_del_timer(qp);
3480                 if (!iwqp->flush_issued) {
3481                         iwqp->flush_issued = 1;
3482                         issue_flush = 1;
3483                 }
3484         } else if ((original_hw_tcp_state == IRDMA_TCP_STATE_CLOSE_WAIT) ||
3485                    ((original_ibqp_state == IB_QPS_RTS) &&
3486                     (last_ae == IRDMA_AE_LLP_CONNECTION_RESET))) {
3487                 issue_disconn = 1;
3488                 if (last_ae == IRDMA_AE_LLP_CONNECTION_RESET)
3489                         disconn_status = -ECONNRESET;
3490         }
3491
3492         if (original_hw_tcp_state == IRDMA_TCP_STATE_CLOSED ||
3493             original_hw_tcp_state == IRDMA_TCP_STATE_TIME_WAIT ||
3494             last_ae == IRDMA_AE_RDMAP_ROE_BAD_LLP_CLOSE ||
3495             last_ae == IRDMA_AE_BAD_CLOSE ||
3496             last_ae == IRDMA_AE_LLP_CONNECTION_RESET || iwdev->rf->reset || !cm_id) {
3497                 issue_close = 1;
3498                 iwqp->cm_id = NULL;
3499                 qp->term_flags = 0;
3500                 if (!iwqp->flush_issued) {
3501                         iwqp->flush_issued = 1;
3502                         issue_flush = 1;
3503                 }
3504         }
3505
3506         spin_unlock_irqrestore(&iwqp->lock, flags);
3507         if (issue_flush && !iwqp->sc_qp.qp_uk.destroy_pending) {
3508                 irdma_flush_wqes(iwqp, IRDMA_FLUSH_SQ | IRDMA_FLUSH_RQ |
3509                                  IRDMA_FLUSH_WAIT);
3510
3511                 if (qp->term_flags)
3512                         irdma_ib_qp_event(iwqp, qp->event_type);
3513         }
3514
3515         if (!cm_id || !cm_id->event_handler)
3516                 return;
3517
3518         spin_lock_irqsave(&iwdev->cm_core.ht_lock, flags);
3519         if (!iwqp->cm_node) {
3520                 spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags);
3521                 return;
3522         }
3523         refcount_inc(&iwqp->cm_node->refcnt);
3524
3525         spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags);
3526
3527         if (issue_disconn) {
3528                 err = irdma_send_cm_event(iwqp->cm_node, cm_id,
3529                                           IW_CM_EVENT_DISCONNECT,
3530                                           disconn_status);
3531                 if (err)
3532                         ibdev_dbg(&iwdev->ibdev,
3533                                   "CM: disconnect event failed: - cm_id = %p\n",
3534                                   cm_id);
3535         }
3536         if (issue_close) {
3537                 cm_id->provider_data = iwqp;
3538                 err = irdma_send_cm_event(iwqp->cm_node, cm_id,
3539                                           IW_CM_EVENT_CLOSE, 0);
3540                 if (err)
3541                         ibdev_dbg(&iwdev->ibdev,
3542                                   "CM: close event failed: - cm_id = %p\n",
3543                                   cm_id);
3544                 irdma_qp_disconnect(iwqp);
3545         }
3546         irdma_rem_ref_cm_node(iwqp->cm_node);
3547 }
3548
3549 /**
3550  * irdma_disconnect_worker - worker for connection close
3551  * @work: points or disconn structure
3552  */
3553 static void irdma_disconnect_worker(struct work_struct *work)
3554 {
3555         struct disconn_work *dwork = container_of(work, struct disconn_work, work);
3556         struct irdma_qp *iwqp = dwork->iwqp;
3557
3558         kfree(dwork);
3559         irdma_cm_disconn_true(iwqp);
3560         irdma_qp_rem_ref(&iwqp->ibqp);
3561 }
3562
3563 /**
3564  * irdma_free_lsmm_rsrc - free lsmm memory and deregister
3565  * @iwqp: associate qp for the connection
3566  */
3567 void irdma_free_lsmm_rsrc(struct irdma_qp *iwqp)
3568 {
3569         struct irdma_device *iwdev;
3570
3571         iwdev = iwqp->iwdev;
3572
3573         if (iwqp->ietf_mem.va) {
3574                 if (iwqp->lsmm_mr)
3575                         iwdev->ibdev.ops.dereg_mr(iwqp->lsmm_mr, NULL);
3576                 dma_free_coherent(iwdev->rf->sc_dev.hw->device,
3577                                   iwqp->ietf_mem.size, iwqp->ietf_mem.va,
3578                                   iwqp->ietf_mem.pa);
3579                 iwqp->ietf_mem.va = NULL;
3580                 iwqp->ietf_mem.va = NULL;
3581         }
3582 }
3583
3584 /**
3585  * irdma_accept - registered call for connection to be accepted
3586  * @cm_id: cm information for passive connection
3587  * @conn_param: accpet parameters
3588  */
3589 int irdma_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3590 {
3591         struct ib_qp *ibqp;
3592         struct irdma_qp *iwqp;
3593         struct irdma_device *iwdev;
3594         struct irdma_sc_dev *dev;
3595         struct irdma_cm_node *cm_node;
3596         struct ib_qp_attr attr = {};
3597         int passive_state;
3598         struct ib_mr *ibmr;
3599         struct irdma_pd *iwpd;
3600         u16 buf_len = 0;
3601         struct irdma_kmem_info accept;
3602         u64 tagged_offset;
3603         int wait_ret;
3604         int ret = 0;
3605
3606         ibqp = irdma_get_qp(cm_id->device, conn_param->qpn);
3607         if (!ibqp)
3608                 return -EINVAL;
3609
3610         iwqp = to_iwqp(ibqp);
3611         iwdev = iwqp->iwdev;
3612         dev = &iwdev->rf->sc_dev;
3613         cm_node = cm_id->provider_data;
3614
3615         if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) {
3616                 cm_node->ipv4 = true;
3617                 cm_node->vlan_id = irdma_get_vlan_ipv4(cm_node->loc_addr);
3618         } else {
3619                 cm_node->ipv4 = false;
3620                 irdma_netdev_vlan_ipv6(cm_node->loc_addr, &cm_node->vlan_id,
3621                                        NULL);
3622         }
3623         ibdev_dbg(&iwdev->ibdev, "CM: Accept vlan_id=%d\n",
3624                   cm_node->vlan_id);
3625
3626         trace_irdma_accept(cm_node, 0, NULL);
3627
3628         if (cm_node->state == IRDMA_CM_STATE_LISTENER_DESTROYED) {
3629                 ret = -EINVAL;
3630                 goto error;
3631         }
3632
3633         passive_state = atomic_add_return(1, &cm_node->passive_state);
3634         if (passive_state == IRDMA_SEND_RESET_EVENT) {
3635                 ret = -ECONNRESET;
3636                 goto error;
3637         }
3638
3639         buf_len = conn_param->private_data_len + IRDMA_MAX_IETF_SIZE;
3640         iwqp->ietf_mem.size = ALIGN(buf_len, 1);
3641         iwqp->ietf_mem.va = dma_alloc_coherent(dev->hw->device,
3642                                                iwqp->ietf_mem.size,
3643                                                &iwqp->ietf_mem.pa, GFP_KERNEL);
3644         if (!iwqp->ietf_mem.va) {
3645                 ret = -ENOMEM;
3646                 goto error;
3647         }
3648
3649         cm_node->pdata.size = conn_param->private_data_len;
3650         accept.addr = iwqp->ietf_mem.va;
3651         accept.size = irdma_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY);
3652         memcpy((u8 *)accept.addr + accept.size, conn_param->private_data,
3653                conn_param->private_data_len);
3654
3655         if (cm_node->dev->ws_add(iwqp->sc_qp.vsi, cm_node->user_pri)) {
3656                 ret = -ENOMEM;
3657                 goto error;
3658         }
3659         iwqp->sc_qp.user_pri = cm_node->user_pri;
3660         irdma_qp_add_qos(&iwqp->sc_qp);
3661         /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3662         iwpd = iwqp->iwpd;
3663         tagged_offset = (uintptr_t)iwqp->ietf_mem.va;
3664         ibmr = irdma_reg_phys_mr(&iwpd->ibpd, iwqp->ietf_mem.pa, buf_len,
3665                                  IB_ACCESS_LOCAL_WRITE, &tagged_offset);
3666         if (IS_ERR(ibmr)) {
3667                 ret = -ENOMEM;
3668                 goto error;
3669         }
3670
3671         ibmr->pd = &iwpd->ibpd;
3672         ibmr->device = iwpd->ibpd.device;
3673         iwqp->lsmm_mr = ibmr;
3674         if (iwqp->page)
3675                 iwqp->sc_qp.qp_uk.sq_base = kmap_local_page(iwqp->page);
3676
3677         cm_node->lsmm_size = accept.size + conn_param->private_data_len;
3678         irdma_sc_send_lsmm(&iwqp->sc_qp, iwqp->ietf_mem.va, cm_node->lsmm_size,
3679                            ibmr->lkey);
3680
3681         if (iwqp->page)
3682                 kunmap_local(iwqp->sc_qp.qp_uk.sq_base);
3683
3684         iwqp->cm_id = cm_id;
3685         cm_node->cm_id = cm_id;
3686
3687         cm_id->provider_data = iwqp;
3688         iwqp->active_conn = 0;
3689         iwqp->cm_node = cm_node;
3690         cm_node->iwqp = iwqp;
3691         irdma_cm_init_tsa_conn(iwqp, cm_node);
3692         irdma_qp_add_ref(&iwqp->ibqp);
3693         cm_id->add_ref(cm_id);
3694
3695         attr.qp_state = IB_QPS_RTS;
3696         cm_node->qhash_set = false;
3697         cm_node->cm_core->cm_free_ah(cm_node);
3698
3699         irdma_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
3700         if (dev->hw_attrs.uk_attrs.feature_flags & IRDMA_FEATURE_RTS_AE) {
3701                 wait_ret = wait_event_interruptible_timeout(iwqp->waitq,
3702                                                             iwqp->rts_ae_rcvd,
3703                                                             IRDMA_MAX_TIMEOUT);
3704                 if (!wait_ret) {
3705                         ibdev_dbg(&iwdev->ibdev,
3706                                   "CM: Slow Connection: cm_node=%p, loc_port=%d, rem_port=%d, cm_id=%p\n",
3707                                   cm_node, cm_node->loc_port,
3708                                   cm_node->rem_port, cm_node->cm_id);
3709                         ret = -ECONNRESET;
3710                         goto error;
3711                 }
3712         }
3713
3714         irdma_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0);
3715         cm_node->accelerated = true;
3716         complete(&cm_node->establish_comp);
3717
3718         if (cm_node->accept_pend) {
3719                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
3720                 cm_node->accept_pend = 0;
3721         }
3722
3723         ibdev_dbg(&iwdev->ibdev,
3724                   "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",
3725                   cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr,
3726                   cm_node->loc_addr, cm_node, cm_id, ibqp->qp_num);
3727         cm_node->cm_core->stats_accepts++;
3728
3729         return 0;
3730 error:
3731         irdma_free_lsmm_rsrc(iwqp);
3732         irdma_rem_ref_cm_node(cm_node);
3733
3734         return ret;
3735 }
3736
3737 /**
3738  * irdma_reject - registered call for connection to be rejected
3739  * @cm_id: cm information for passive connection
3740  * @pdata: private data to be sent
3741  * @pdata_len: private data length
3742  */
3743 int irdma_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3744 {
3745         struct irdma_device *iwdev;
3746         struct irdma_cm_node *cm_node;
3747
3748         cm_node = cm_id->provider_data;
3749         cm_node->pdata.size = pdata_len;
3750
3751         trace_irdma_reject(cm_node, 0, NULL);
3752
3753         iwdev = to_iwdev(cm_id->device);
3754         if (!iwdev)
3755                 return -EINVAL;
3756
3757         cm_node->cm_core->stats_rejects++;
3758
3759         if (pdata_len + sizeof(struct ietf_mpa_v2) > IRDMA_MAX_CM_BUF)
3760                 return -EINVAL;
3761
3762         return irdma_cm_reject(cm_node, pdata, pdata_len);
3763 }
3764
3765 /**
3766  * irdma_connect - registered call for connection to be established
3767  * @cm_id: cm information for passive connection
3768  * @conn_param: Information about the connection
3769  */
3770 int irdma_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3771 {
3772         struct ib_qp *ibqp;
3773         struct irdma_qp *iwqp;
3774         struct irdma_device *iwdev;
3775         struct irdma_cm_node *cm_node;
3776         struct irdma_cm_info cm_info;
3777         struct sockaddr_in *laddr;
3778         struct sockaddr_in *raddr;
3779         struct sockaddr_in6 *laddr6;
3780         struct sockaddr_in6 *raddr6;
3781         int ret = 0;
3782
3783         ibqp = irdma_get_qp(cm_id->device, conn_param->qpn);
3784         if (!ibqp)
3785                 return -EINVAL;
3786         iwqp = to_iwqp(ibqp);
3787         if (!iwqp)
3788                 return -EINVAL;
3789         iwdev = iwqp->iwdev;
3790         if (!iwdev)
3791                 return -EINVAL;
3792
3793         laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3794         raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
3795         laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3796         raddr6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr;
3797
3798         if (!(laddr->sin_port) || !(raddr->sin_port))
3799                 return -EINVAL;
3800
3801         iwqp->active_conn = 1;
3802         iwqp->cm_id = NULL;
3803         cm_id->provider_data = iwqp;
3804
3805         /* set up the connection params for the node */
3806         if (cm_id->remote_addr.ss_family == AF_INET) {
3807                 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV4)
3808                         return -EINVAL;
3809
3810                 cm_info.ipv4 = true;
3811                 memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr));
3812                 memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr));
3813                 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3814                 cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr);
3815                 cm_info.loc_port = ntohs(laddr->sin_port);
3816                 cm_info.rem_port = ntohs(raddr->sin_port);
3817                 cm_info.vlan_id = irdma_get_vlan_ipv4(cm_info.loc_addr);
3818         } else {
3819                 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV6)
3820                         return -EINVAL;
3821
3822                 cm_info.ipv4 = false;
3823                 irdma_copy_ip_ntohl(cm_info.loc_addr,
3824                                     laddr6->sin6_addr.in6_u.u6_addr32);
3825                 irdma_copy_ip_ntohl(cm_info.rem_addr,
3826                                     raddr6->sin6_addr.in6_u.u6_addr32);
3827                 cm_info.loc_port = ntohs(laddr6->sin6_port);
3828                 cm_info.rem_port = ntohs(raddr6->sin6_port);
3829                 irdma_netdev_vlan_ipv6(cm_info.loc_addr, &cm_info.vlan_id,
3830                                        NULL);
3831         }
3832         cm_info.cm_id = cm_id;
3833         cm_info.qh_qpid = iwdev->vsi.ilq->qp_id;
3834         cm_info.tos = cm_id->tos;
3835         if (iwdev->vsi.dscp_mode)
3836                 cm_info.user_pri =
3837                         iwqp->sc_qp.vsi->dscp_map[irdma_tos2dscp(cm_info.tos)];
3838         else
3839                 cm_info.user_pri = rt_tos2priority(cm_id->tos);
3840
3841         if (iwqp->sc_qp.dev->ws_add(iwqp->sc_qp.vsi, cm_info.user_pri))
3842                 return -ENOMEM;
3843         iwqp->sc_qp.user_pri = cm_info.user_pri;
3844         irdma_qp_add_qos(&iwqp->sc_qp);
3845         ibdev_dbg(&iwdev->ibdev, "DCB: TOS:[%d] UP:[%d]\n", cm_id->tos,
3846                   cm_info.user_pri);
3847
3848         trace_irdma_dcb_tos(iwdev, cm_id->tos, cm_info.user_pri);
3849
3850         ret = irdma_create_cm_node(&iwdev->cm_core, iwdev, conn_param, &cm_info,
3851                                    &cm_node);
3852         if (ret)
3853                 return ret;
3854         ret = cm_node->cm_core->cm_create_ah(cm_node, true);
3855         if (ret)
3856                 goto err;
3857         if (irdma_manage_qhash(iwdev, &cm_info,
3858                                IRDMA_QHASH_TYPE_TCP_ESTABLISHED,
3859                                IRDMA_QHASH_MANAGE_TYPE_ADD, NULL, true)) {
3860                 ret = -EINVAL;
3861                 goto err;
3862         }
3863         cm_node->qhash_set = true;
3864
3865         cm_node->apbvt_entry = irdma_add_apbvt(iwdev, cm_info.loc_port);
3866         if (!cm_node->apbvt_entry) {
3867                 ret = -EINVAL;
3868                 goto err;
3869         }
3870
3871         cm_node->apbvt_set = true;
3872         iwqp->cm_node = cm_node;
3873         cm_node->iwqp = iwqp;
3874         iwqp->cm_id = cm_id;
3875         irdma_qp_add_ref(&iwqp->ibqp);
3876         cm_id->add_ref(cm_id);
3877
3878         if (cm_node->state != IRDMA_CM_STATE_OFFLOADED) {
3879                 cm_node->state = IRDMA_CM_STATE_SYN_SENT;
3880                 ret = irdma_send_syn(cm_node, 0);
3881                 if (ret)
3882                         goto err;
3883         }
3884
3885         ibdev_dbg(&iwdev->ibdev,
3886                   "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",
3887                   cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr,
3888                   cm_node->loc_addr, cm_node, cm_id, ibqp->qp_num);
3889
3890         trace_irdma_connect(cm_node, 0, NULL);
3891
3892         return 0;
3893
3894 err:
3895         if (cm_info.ipv4)
3896                 ibdev_dbg(&iwdev->ibdev,
3897                           "CM: connect() FAILED: dest addr=%pI4",
3898                           cm_info.rem_addr);
3899         else
3900                 ibdev_dbg(&iwdev->ibdev,
3901                           "CM: connect() FAILED: dest addr=%pI6",
3902                           cm_info.rem_addr);
3903         irdma_rem_ref_cm_node(cm_node);
3904         iwdev->cm_core.stats_connect_errs++;
3905
3906         return ret;
3907 }
3908
3909 /**
3910  * irdma_create_listen - registered call creating listener
3911  * @cm_id: cm information for passive connection
3912  * @backlog: to max accept pending count
3913  */
3914 int irdma_create_listen(struct iw_cm_id *cm_id, int backlog)
3915 {
3916         struct irdma_device *iwdev;
3917         struct irdma_cm_listener *cm_listen_node;
3918         struct irdma_cm_info cm_info = {};
3919         struct sockaddr_in *laddr;
3920         struct sockaddr_in6 *laddr6;
3921         bool wildcard = false;
3922         int err;
3923
3924         iwdev = to_iwdev(cm_id->device);
3925         if (!iwdev)
3926                 return -EINVAL;
3927
3928         laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3929         laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3930         cm_info.qh_qpid = iwdev->vsi.ilq->qp_id;
3931
3932         if (laddr->sin_family == AF_INET) {
3933                 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV4)
3934                         return -EINVAL;
3935
3936                 cm_info.ipv4 = true;
3937                 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3938                 cm_info.loc_port = ntohs(laddr->sin_port);
3939
3940                 if (laddr->sin_addr.s_addr != htonl(INADDR_ANY)) {
3941                         cm_info.vlan_id = irdma_get_vlan_ipv4(cm_info.loc_addr);
3942                 } else {
3943                         cm_info.vlan_id = 0xFFFF;
3944                         wildcard = true;
3945                 }
3946         } else {
3947                 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV6)
3948                         return -EINVAL;
3949
3950                 cm_info.ipv4 = false;
3951                 irdma_copy_ip_ntohl(cm_info.loc_addr,
3952                                     laddr6->sin6_addr.in6_u.u6_addr32);
3953                 cm_info.loc_port = ntohs(laddr6->sin6_port);
3954                 if (ipv6_addr_type(&laddr6->sin6_addr) != IPV6_ADDR_ANY) {
3955                         irdma_netdev_vlan_ipv6(cm_info.loc_addr,
3956                                                &cm_info.vlan_id, NULL);
3957                 } else {
3958                         cm_info.vlan_id = 0xFFFF;
3959                         wildcard = true;
3960                 }
3961         }
3962
3963         if (cm_info.vlan_id >= VLAN_N_VID && iwdev->dcb_vlan_mode)
3964                 cm_info.vlan_id = 0;
3965         cm_info.backlog = backlog;
3966         cm_info.cm_id = cm_id;
3967
3968         trace_irdma_create_listen(iwdev, &cm_info);
3969
3970         cm_listen_node = irdma_make_listen_node(&iwdev->cm_core, iwdev,
3971                                                 &cm_info);
3972         if (!cm_listen_node) {
3973                 ibdev_dbg(&iwdev->ibdev,
3974                           "CM: cm_listen_node == NULL\n");
3975                 return -ENOMEM;
3976         }
3977
3978         cm_id->provider_data = cm_listen_node;
3979
3980         cm_listen_node->tos = cm_id->tos;
3981         if (iwdev->vsi.dscp_mode)
3982                 cm_listen_node->user_pri =
3983                         iwdev->vsi.dscp_map[irdma_tos2dscp(cm_id->tos)];
3984         else
3985                 cm_listen_node->user_pri = rt_tos2priority(cm_id->tos);
3986         cm_info.user_pri = cm_listen_node->user_pri;
3987         if (!cm_listen_node->reused_node) {
3988                 if (wildcard) {
3989                         err = irdma_add_mqh(iwdev, &cm_info, cm_listen_node);
3990                         if (err)
3991                                 goto error;
3992                 } else {
3993                         err = irdma_manage_qhash(iwdev, &cm_info,
3994                                                  IRDMA_QHASH_TYPE_TCP_SYN,
3995                                                  IRDMA_QHASH_MANAGE_TYPE_ADD,
3996                                                  NULL, true);
3997                         if (err)
3998                                 goto error;
3999
4000                         cm_listen_node->qhash_set = true;
4001                 }
4002
4003                 cm_listen_node->apbvt_entry = irdma_add_apbvt(iwdev,
4004                                                               cm_info.loc_port);
4005                 if (!cm_listen_node->apbvt_entry)
4006                         goto error;
4007         }
4008         cm_id->add_ref(cm_id);
4009         cm_listen_node->cm_core->stats_listen_created++;
4010         ibdev_dbg(&iwdev->ibdev,
4011                   "CM: loc_port=0x%04x loc_addr=%pI4 cm_listen_node=%p cm_id=%p qhash_set=%d vlan_id=%d\n",
4012                   cm_listen_node->loc_port, cm_listen_node->loc_addr,
4013                   cm_listen_node, cm_listen_node->cm_id,
4014                   cm_listen_node->qhash_set, cm_listen_node->vlan_id);
4015
4016         return 0;
4017
4018 error:
4019
4020         irdma_cm_del_listen(&iwdev->cm_core, cm_listen_node, false);
4021
4022         return -EINVAL;
4023 }
4024
4025 /**
4026  * irdma_destroy_listen - registered call to destroy listener
4027  * @cm_id: cm information for passive connection
4028  */
4029 int irdma_destroy_listen(struct iw_cm_id *cm_id)
4030 {
4031         struct irdma_device *iwdev;
4032
4033         iwdev = to_iwdev(cm_id->device);
4034         if (cm_id->provider_data)
4035                 irdma_cm_del_listen(&iwdev->cm_core, cm_id->provider_data,
4036                                     true);
4037         else
4038                 ibdev_dbg(&iwdev->ibdev,
4039                           "CM: cm_id->provider_data was NULL\n");
4040
4041         cm_id->rem_ref(cm_id);
4042
4043         return 0;
4044 }
4045
4046 /**
4047  * irdma_teardown_list_prep - add conn nodes slated for tear down to list
4048  * @cm_core: cm's core
4049  * @teardown_list: a list to which cm_node will be selected
4050  * @ipaddr: pointer to ip address
4051  * @nfo: pointer to cm_info structure instance
4052  * @disconnect_all: flag indicating disconnect all QPs
4053  */
4054 static void irdma_teardown_list_prep(struct irdma_cm_core *cm_core,
4055                                      struct list_head *teardown_list,
4056                                      u32 *ipaddr,
4057                                      struct irdma_cm_info *nfo,
4058                                      bool disconnect_all)
4059 {
4060         struct irdma_cm_node *cm_node;
4061         int bkt;
4062
4063         hash_for_each_rcu(cm_core->cm_hash_tbl, bkt, cm_node, list) {
4064                 if ((disconnect_all ||
4065                      (nfo->vlan_id == cm_node->vlan_id &&
4066                       !memcmp(cm_node->loc_addr, ipaddr, nfo->ipv4 ? 4 : 16))) &&
4067                     refcount_inc_not_zero(&cm_node->refcnt))
4068                         list_add(&cm_node->teardown_entry, teardown_list);
4069         }
4070 }
4071
4072 /**
4073  * irdma_cm_event_connected - handle connected active node
4074  * @event: the info for cm_node of connection
4075  */
4076 static void irdma_cm_event_connected(struct irdma_cm_event *event)
4077 {
4078         struct irdma_qp *iwqp;
4079         struct irdma_device *iwdev;
4080         struct irdma_cm_node *cm_node;
4081         struct irdma_sc_dev *dev;
4082         struct ib_qp_attr attr = {};
4083         struct iw_cm_id *cm_id;
4084         int status;
4085         bool read0;
4086         int wait_ret = 0;
4087
4088         cm_node = event->cm_node;
4089         cm_id = cm_node->cm_id;
4090         iwqp = cm_id->provider_data;
4091         iwdev = iwqp->iwdev;
4092         dev = &iwdev->rf->sc_dev;
4093         if (iwqp->sc_qp.qp_uk.destroy_pending) {
4094                 status = -ETIMEDOUT;
4095                 goto error;
4096         }
4097
4098         irdma_cm_init_tsa_conn(iwqp, cm_node);
4099         read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO);
4100         if (iwqp->page)
4101                 iwqp->sc_qp.qp_uk.sq_base = kmap_local_page(iwqp->page);
4102         irdma_sc_send_rtt(&iwqp->sc_qp, read0);
4103         if (iwqp->page)
4104                 kunmap_local(iwqp->sc_qp.qp_uk.sq_base);
4105
4106         attr.qp_state = IB_QPS_RTS;
4107         cm_node->qhash_set = false;
4108         irdma_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
4109         if (dev->hw_attrs.uk_attrs.feature_flags & IRDMA_FEATURE_RTS_AE) {
4110                 wait_ret = wait_event_interruptible_timeout(iwqp->waitq,
4111                                                             iwqp->rts_ae_rcvd,
4112                                                             IRDMA_MAX_TIMEOUT);
4113                 if (!wait_ret)
4114                         ibdev_dbg(&iwdev->ibdev,
4115                                   "CM: Slow Connection: cm_node=%p, loc_port=%d, rem_port=%d, cm_id=%p\n",
4116                                   cm_node, cm_node->loc_port,
4117                                   cm_node->rem_port, cm_node->cm_id);
4118         }
4119
4120         irdma_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 0);
4121         cm_node->accelerated = true;
4122         complete(&cm_node->establish_comp);
4123         cm_node->cm_core->cm_free_ah(cm_node);
4124         return;
4125
4126 error:
4127         iwqp->cm_id = NULL;
4128         cm_id->provider_data = NULL;
4129         irdma_send_cm_event(event->cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY,
4130                             status);
4131         irdma_rem_ref_cm_node(event->cm_node);
4132 }
4133
4134 /**
4135  * irdma_cm_event_reset - handle reset
4136  * @event: the info for cm_node of connection
4137  */
4138 static void irdma_cm_event_reset(struct irdma_cm_event *event)
4139 {
4140         struct irdma_cm_node *cm_node = event->cm_node;
4141         struct iw_cm_id *cm_id = cm_node->cm_id;
4142         struct irdma_qp *iwqp;
4143
4144         if (!cm_id)
4145                 return;
4146
4147         iwqp = cm_id->provider_data;
4148         if (!iwqp)
4149                 return;
4150
4151         ibdev_dbg(&cm_node->iwdev->ibdev,
4152                   "CM: reset event %p - cm_id = %p\n", event->cm_node, cm_id);
4153         iwqp->cm_id = NULL;
4154
4155         irdma_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT,
4156                             -ECONNRESET);
4157         irdma_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0);
4158 }
4159
4160 /**
4161  * irdma_cm_event_handler - send event to cm upper layer
4162  * @work: pointer of cm event info.
4163  */
4164 static void irdma_cm_event_handler(struct work_struct *work)
4165 {
4166         struct irdma_cm_event *event = container_of(work, struct irdma_cm_event, event_work);
4167         struct irdma_cm_node *cm_node;
4168
4169         if (!event || !event->cm_node || !event->cm_node->cm_core)
4170                 return;
4171
4172         cm_node = event->cm_node;
4173         trace_irdma_cm_event_handler(cm_node, event->type, NULL);
4174
4175         switch (event->type) {
4176         case IRDMA_CM_EVENT_MPA_REQ:
4177                 irdma_send_cm_event(cm_node, cm_node->cm_id,
4178                                     IW_CM_EVENT_CONNECT_REQUEST, 0);
4179                 break;
4180         case IRDMA_CM_EVENT_RESET:
4181                 irdma_cm_event_reset(event);
4182                 break;
4183         case IRDMA_CM_EVENT_CONNECTED:
4184                 if (!event->cm_node->cm_id ||
4185                     event->cm_node->state != IRDMA_CM_STATE_OFFLOADED)
4186                         break;
4187                 irdma_cm_event_connected(event);
4188                 break;
4189         case IRDMA_CM_EVENT_MPA_REJECT:
4190                 if (!event->cm_node->cm_id ||
4191                     cm_node->state == IRDMA_CM_STATE_OFFLOADED)
4192                         break;
4193                 irdma_send_cm_event(cm_node, cm_node->cm_id,
4194                                     IW_CM_EVENT_CONNECT_REPLY, -ECONNREFUSED);
4195                 break;
4196         case IRDMA_CM_EVENT_ABORTED:
4197                 if (!event->cm_node->cm_id ||
4198                     event->cm_node->state == IRDMA_CM_STATE_OFFLOADED)
4199                         break;
4200                 irdma_event_connect_error(event);
4201                 break;
4202         default:
4203                 ibdev_dbg(&cm_node->iwdev->ibdev,
4204                           "CM: bad event type = %d\n", event->type);
4205                 break;
4206         }
4207
4208         irdma_rem_ref_cm_node(event->cm_node);
4209         kfree(event);
4210 }
4211
4212 /**
4213  * irdma_cm_post_event - queue event request for worker thread
4214  * @event: cm node's info for up event call
4215  */
4216 static void irdma_cm_post_event(struct irdma_cm_event *event)
4217 {
4218         refcount_inc(&event->cm_node->refcnt);
4219         INIT_WORK(&event->event_work, irdma_cm_event_handler);
4220         queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
4221 }
4222
4223 /**
4224  * irdma_cm_teardown_connections - teardown QPs
4225  * @iwdev: device pointer
4226  * @ipaddr: Pointer to IPv4 or IPv6 address
4227  * @nfo: Connection info
4228  * @disconnect_all: flag indicating disconnect all QPs
4229  *
4230  * teardown QPs where source or destination addr matches ip addr
4231  */
4232 void irdma_cm_teardown_connections(struct irdma_device *iwdev, u32 *ipaddr,
4233                                    struct irdma_cm_info *nfo,
4234                                    bool disconnect_all)
4235 {
4236         struct irdma_cm_core *cm_core = &iwdev->cm_core;
4237         struct list_head *list_core_temp;
4238         struct list_head *list_node;
4239         struct irdma_cm_node *cm_node;
4240         struct list_head teardown_list;
4241         struct ib_qp_attr attr;
4242
4243         INIT_LIST_HEAD(&teardown_list);
4244
4245         rcu_read_lock();
4246         irdma_teardown_list_prep(cm_core, &teardown_list, ipaddr, nfo, disconnect_all);
4247         rcu_read_unlock();
4248
4249         list_for_each_safe (list_node, list_core_temp, &teardown_list) {
4250                 cm_node = container_of(list_node, struct irdma_cm_node,
4251                                        teardown_entry);
4252                 attr.qp_state = IB_QPS_ERR;
4253                 irdma_modify_qp(&cm_node->iwqp->ibqp, &attr, IB_QP_STATE, NULL);
4254                 if (iwdev->rf->reset)
4255                         irdma_cm_disconn(cm_node->iwqp);
4256                 irdma_rem_ref_cm_node(cm_node);
4257         }
4258 }
4259
4260 /**
4261  * irdma_qhash_ctrl - enable/disable qhash for list
4262  * @iwdev: device pointer
4263  * @parent_listen_node: parent listen node
4264  * @nfo: cm info node
4265  * @ipaddr: Pointer to IPv4 or IPv6 address
4266  * @ipv4: flag indicating IPv4 when true
4267  * @ifup: flag indicating interface up when true
4268  *
4269  * Enables or disables the qhash for the node in the child
4270  * listen list that matches ipaddr. If no matching IP was found
4271  * it will allocate and add a new child listen node to the
4272  * parent listen node. The listen_list_lock is assumed to be
4273  * held when called.
4274  */
4275 static void irdma_qhash_ctrl(struct irdma_device *iwdev,
4276                              struct irdma_cm_listener *parent_listen_node,
4277                              struct irdma_cm_info *nfo, u32 *ipaddr, bool ipv4,
4278                              bool ifup)
4279 {
4280         struct list_head *child_listen_list = &parent_listen_node->child_listen_list;
4281         struct irdma_cm_listener *child_listen_node;
4282         struct list_head *pos, *tpos;
4283         bool node_allocated = false;
4284         enum irdma_quad_hash_manage_type op = ifup ?
4285                                               IRDMA_QHASH_MANAGE_TYPE_ADD :
4286                                               IRDMA_QHASH_MANAGE_TYPE_DELETE;
4287         int err;
4288
4289         list_for_each_safe (pos, tpos, child_listen_list) {
4290                 child_listen_node = list_entry(pos, struct irdma_cm_listener,
4291                                                child_listen_list);
4292                 if (!memcmp(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16))
4293                         goto set_qhash;
4294         }
4295
4296         /* if not found then add a child listener if interface is going up */
4297         if (!ifup)
4298                 return;
4299         child_listen_node = kmemdup(parent_listen_node,
4300                                     sizeof(*child_listen_node), GFP_ATOMIC);
4301         if (!child_listen_node)
4302                 return;
4303
4304         node_allocated = true;
4305         memcpy(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16);
4306
4307 set_qhash:
4308         memcpy(nfo->loc_addr, child_listen_node->loc_addr,
4309                sizeof(nfo->loc_addr));
4310         nfo->vlan_id = child_listen_node->vlan_id;
4311         err = irdma_manage_qhash(iwdev, nfo, IRDMA_QHASH_TYPE_TCP_SYN, op, NULL,
4312                                  false);
4313         if (!err) {
4314                 child_listen_node->qhash_set = ifup;
4315                 if (node_allocated)
4316                         list_add(&child_listen_node->child_listen_list,
4317                                  &parent_listen_node->child_listen_list);
4318         } else if (node_allocated) {
4319                 kfree(child_listen_node);
4320         }
4321 }
4322
4323 /**
4324  * irdma_if_notify - process an ifdown on an interface
4325  * @iwdev: device pointer
4326  * @netdev: network device structure
4327  * @ipaddr: Pointer to IPv4 or IPv6 address
4328  * @ipv4: flag indicating IPv4 when true
4329  * @ifup: flag indicating interface up when true
4330  */
4331 void irdma_if_notify(struct irdma_device *iwdev, struct net_device *netdev,
4332                      u32 *ipaddr, bool ipv4, bool ifup)
4333 {
4334         struct irdma_cm_core *cm_core = &iwdev->cm_core;
4335         unsigned long flags;
4336         struct irdma_cm_listener *listen_node;
4337         static const u32 ip_zero[4] = { 0, 0, 0, 0 };
4338         struct irdma_cm_info nfo = {};
4339         u16 vlan_id = rdma_vlan_dev_vlan_id(netdev);
4340         enum irdma_quad_hash_manage_type op = ifup ?
4341                                               IRDMA_QHASH_MANAGE_TYPE_ADD :
4342                                               IRDMA_QHASH_MANAGE_TYPE_DELETE;
4343
4344         nfo.vlan_id = vlan_id;
4345         nfo.ipv4 = ipv4;
4346         nfo.qh_qpid = 1;
4347
4348         /* Disable or enable qhash for listeners */
4349         spin_lock_irqsave(&cm_core->listen_list_lock, flags);
4350         list_for_each_entry (listen_node, &cm_core->listen_list, list) {
4351                 if (vlan_id != listen_node->vlan_id ||
4352                     (memcmp(listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16) &&
4353                      memcmp(listen_node->loc_addr, ip_zero, ipv4 ? 4 : 16)))
4354                         continue;
4355
4356                 memcpy(nfo.loc_addr, listen_node->loc_addr,
4357                        sizeof(nfo.loc_addr));
4358                 nfo.loc_port = listen_node->loc_port;
4359                 nfo.user_pri = listen_node->user_pri;
4360                 if (!list_empty(&listen_node->child_listen_list)) {
4361                         irdma_qhash_ctrl(iwdev, listen_node, &nfo, ipaddr, ipv4,
4362                                          ifup);
4363                 } else if (memcmp(listen_node->loc_addr, ip_zero,
4364                                   ipv4 ? 4 : 16)) {
4365                         if (!irdma_manage_qhash(iwdev, &nfo,
4366                                                 IRDMA_QHASH_TYPE_TCP_SYN, op,
4367                                                 NULL, false))
4368                                 listen_node->qhash_set = ifup;
4369                 }
4370         }
4371         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
4372
4373         /* disconnect any connected qp's on ifdown */
4374         if (!ifup)
4375                 irdma_cm_teardown_connections(iwdev, ipaddr, &nfo, false);
4376 }