drivers/infiniband/hw/i40iw/i40iw_cm.c

   1 /*******************************************************************************
   2 *
   3 * Copyright (c) 2015-2016 Intel Corporation.  All rights reserved.
   4 *
   5 * This software is available to you under a choice of one of two
   6 * licenses.  You may choose to be licensed under the terms of the GNU
   7 * General Public License (GPL) Version 2, available from the file
   8 * COPYING in the main directory of this source tree, or the
   9 * OpenFabrics.org BSD license below:
  10 *
  11 *   Redistribution and use in source and binary forms, with or
  12 *   without modification, are permitted provided that the following
  13 *   conditions are met:
  14 *
  15 *    - Redistributions of source code must retain the above
  16 *       copyright notice, this list of conditions and the following
  17 *       disclaimer.
  18 *
  19 *    - Redistributions in binary form must reproduce the above
  20 *       copyright notice, this list of conditions and the following
  21 *       disclaimer in the documentation and/or other materials
  22 *       provided with the distribution.
  23 *
  24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  31 * SOFTWARE.
  32 *
  33 *******************************************************************************/
  34
  35 #include <linux/atomic.h>
  36 #include <linux/ip.h>
  37 #include <linux/tcp.h>
  38 #include <linux/init.h>
  39 #include <linux/if_arp.h>
  40 #include <linux/if_vlan.h>
  41 #include <linux/notifier.h>
  42 #include <linux/net.h>
  43 #include <linux/types.h>
  44 #include <linux/timer.h>
  45 #include <linux/time.h>
  46 #include <linux/delay.h>
  47 #include <linux/etherdevice.h>
  48 #include <linux/netdevice.h>
  49 #include <linux/random.h>
  50 #include <linux/list.h>
  51 #include <linux/threads.h>
  52 #include <linux/highmem.h>
  53 #include <net/arp.h>
  54 #include <net/ndisc.h>
  55 #include <net/neighbour.h>
  56 #include <net/route.h>
  57 #include <net/addrconf.h>
  58 #include <net/ip6_route.h>
  59 #include <net/ip_fib.h>
  60 #include <net/tcp.h>
  61 #include <asm/checksum.h>
  62
  63 #include "i40iw.h"
  64
  65 static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *);
  66 static void i40iw_cm_post_event(struct i40iw_cm_event *event);
  67 static void i40iw_disconnect_worker(struct work_struct *work);
  68
  69 /**
  70  * i40iw_free_sqbuf - put back puda buffer if refcount = 0
  71  * @vsi: pointer to vsi structure
  72  * @buf: puda buffer to free
  73  */
  74 void i40iw_free_sqbuf(struct i40iw_sc_vsi *vsi, void *bufp)
  75 {
  76         struct i40iw_puda_buf *buf = (struct i40iw_puda_buf *)bufp;
  77         struct i40iw_puda_rsrc *ilq = vsi->ilq;
  78
  79         if (!atomic_dec_return(&buf->refcount))
  80                 i40iw_puda_ret_bufpool(ilq, buf);
  81 }
  82
  83 /**
  84  * i40iw_derive_hw_ird_setting - Calculate IRD
  85  *
  86  * @cm_ird: IRD of connection's node
  87  *
  88  * The ird from the connection is rounded to a supported HW
  89  * setting (2,8,32,64) and then encoded for ird_size field of
  90  * qp_ctx
  91  */
  92 static u8 i40iw_derive_hw_ird_setting(u16 cm_ird)
  93 {
  94         u8 encoded_ird_size;
  95         u8 pof2_cm_ird = 1;
  96
  97         /* round-off to next powerof2 */
  98         while (pof2_cm_ird < cm_ird)
  99                 pof2_cm_ird *= 2;
 100
 101         /* ird_size field is encoded in qp_ctx */
 102         switch (pof2_cm_ird) {
 103         case I40IW_HW_IRD_SETTING_64:
 104                 encoded_ird_size = 3;
 105                 break;
 106         case I40IW_HW_IRD_SETTING_32:
 107         case I40IW_HW_IRD_SETTING_16:
 108                 encoded_ird_size = 2;
 109                 break;
 110         case I40IW_HW_IRD_SETTING_8:
 111         case I40IW_HW_IRD_SETTING_4:
 112                 encoded_ird_size = 1;
 113                 break;
 114         case I40IW_HW_IRD_SETTING_2:
 115         default:
 116                 encoded_ird_size = 0;
 117                 break;
 118         }
 119         return encoded_ird_size;
 120 }
 121
 122 /**
 123  * i40iw_record_ird_ord - Record IRD/ORD passed in
 124  * @cm_node: connection's node
 125  * @conn_ird: connection IRD
 126  * @conn_ord: connection ORD
 127  */
 128 static void i40iw_record_ird_ord(struct i40iw_cm_node *cm_node, u32 conn_ird,
 129                                  u32 conn_ord)
 130 {
 131         if (conn_ird > I40IW_MAX_IRD_SIZE)
 132                 conn_ird = I40IW_MAX_IRD_SIZE;
 133
 134         if (conn_ord > I40IW_MAX_ORD_SIZE)
 135                 conn_ord = I40IW_MAX_ORD_SIZE;
 136
 137         cm_node->ird_size = conn_ird;
 138         cm_node->ord_size = conn_ord;
 139 }
 140
 141 /**
 142  * i40iw_copy_ip_ntohl - change network to host ip
 143  * @dst: host ip
 144  * @src: big endian
 145  */
 146 void i40iw_copy_ip_ntohl(u32 *dst, __be32 *src)
 147 {
 148         *dst++ = ntohl(*src++);
 149         *dst++ = ntohl(*src++);
 150         *dst++ = ntohl(*src++);
 151         *dst = ntohl(*src);
 152 }
 153
 154 /**
 155  * i40iw_copy_ip_htonl - change host addr to network ip
 156  * @dst: host ip
 157  * @src: little endian
 158  */
 159 static inline void i40iw_copy_ip_htonl(__be32 *dst, u32 *src)
 160 {
 161         *dst++ = htonl(*src++);
 162         *dst++ = htonl(*src++);
 163         *dst++ = htonl(*src++);
 164         *dst = htonl(*src);
 165 }
 166
 167 /**
 168  * i40iw_fill_sockaddr4 - get addr info for passive connection
 169  * @cm_node: connection's node
 170  * @event: upper layer's cm event
 171  */
 172 static inline void i40iw_fill_sockaddr4(struct i40iw_cm_node *cm_node,
 173                                         struct iw_cm_event *event)
 174 {
 175         struct sockaddr_in *laddr = (struct sockaddr_in *)&event->local_addr;
 176         struct sockaddr_in *raddr = (struct sockaddr_in *)&event->remote_addr;
 177
 178         laddr->sin_family = AF_INET;
 179         raddr->sin_family = AF_INET;
 180
 181         laddr->sin_port = htons(cm_node->loc_port);
 182         raddr->sin_port = htons(cm_node->rem_port);
 183
 184         laddr->sin_addr.s_addr = htonl(cm_node->loc_addr[0]);
 185         raddr->sin_addr.s_addr = htonl(cm_node->rem_addr[0]);
 186 }
 187
 188 /**
 189  * i40iw_fill_sockaddr6 - get ipv6 addr info for passive side
 190  * @cm_node: connection's node
 191  * @event: upper layer's cm event
 192  */
 193 static inline void i40iw_fill_sockaddr6(struct i40iw_cm_node *cm_node,
 194                                         struct iw_cm_event *event)
 195 {
 196         struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)&event->local_addr;
 197         struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)&event->remote_addr;
 198
 199         laddr6->sin6_family = AF_INET6;
 200         raddr6->sin6_family = AF_INET6;
 201
 202         laddr6->sin6_port = htons(cm_node->loc_port);
 203         raddr6->sin6_port = htons(cm_node->rem_port);
 204
 205         i40iw_copy_ip_htonl(laddr6->sin6_addr.in6_u.u6_addr32,
 206                             cm_node->loc_addr);
 207         i40iw_copy_ip_htonl(raddr6->sin6_addr.in6_u.u6_addr32,
 208                             cm_node->rem_addr);
 209 }
 210
 211 /**
 212  * i40iw_get_addr_info
 213  * @cm_node: contains ip/tcp info
 214  * @cm_info: to get a copy of the cm_node ip/tcp info
 215 */
 216 static void i40iw_get_addr_info(struct i40iw_cm_node *cm_node,
 217                                 struct i40iw_cm_info *cm_info)
 218 {
 219         cm_info->ipv4 = cm_node->ipv4;
 220         cm_info->vlan_id = cm_node->vlan_id;
 221         memcpy(cm_info->loc_addr, cm_node->loc_addr, sizeof(cm_info->loc_addr));
 222         memcpy(cm_info->rem_addr, cm_node->rem_addr, sizeof(cm_info->rem_addr));
 223         cm_info->loc_port = cm_node->loc_port;
 224         cm_info->rem_port = cm_node->rem_port;
 225         cm_info->user_pri = cm_node->user_pri;
 226 }
 227
 228 /**
 229  * i40iw_get_cmevent_info - for cm event upcall
 230  * @cm_node: connection's node
 231  * @cm_id: upper layers cm struct for the event
 232  * @event: upper layer's cm event
 233  */
 234 static inline void i40iw_get_cmevent_info(struct i40iw_cm_node *cm_node,
 235                                           struct iw_cm_id *cm_id,
 236                                           struct iw_cm_event *event)
 237 {
 238         memcpy(&event->local_addr, &cm_id->m_local_addr,
 239                sizeof(event->local_addr));
 240         memcpy(&event->remote_addr, &cm_id->m_remote_addr,
 241                sizeof(event->remote_addr));
 242         if (cm_node) {
 243                 event->private_data = (void *)cm_node->pdata_buf;
 244                 event->private_data_len = (u8)cm_node->pdata.size;
 245                 event->ird = cm_node->ird_size;
 246                 event->ord = cm_node->ord_size;
 247         }
 248 }
 249
 250 /**
 251  * i40iw_send_cm_event - upcall cm's event handler
 252  * @cm_node: connection's node
 253  * @cm_id: upper layer's cm info struct
 254  * @type: Event type to indicate
 255  * @status: status for the event type
 256  */
 257 static int i40iw_send_cm_event(struct i40iw_cm_node *cm_node,
 258                                struct iw_cm_id *cm_id,
 259                                enum iw_cm_event_type type,
 260                                int status)
 261 {
 262         struct iw_cm_event event;
 263
 264         memset(&event, 0, sizeof(event));
 265         event.event = type;
 266         event.status = status;
 267         switch (type) {
 268         case IW_CM_EVENT_CONNECT_REQUEST:
 269                 if (cm_node->ipv4)
 270                         i40iw_fill_sockaddr4(cm_node, &event);
 271                 else
 272                         i40iw_fill_sockaddr6(cm_node, &event);
 273                 event.provider_data = (void *)cm_node;
 274                 event.private_data = (void *)cm_node->pdata_buf;
 275                 event.private_data_len = (u8)cm_node->pdata.size;
 276                 event.ird = cm_node->ird_size;
 277                 break;
 278         case IW_CM_EVENT_CONNECT_REPLY:
 279                 i40iw_get_cmevent_info(cm_node, cm_id, &event);
 280                 break;
 281         case IW_CM_EVENT_ESTABLISHED:
 282                 event.ird = cm_node->ird_size;
 283                 event.ord = cm_node->ord_size;
 284                 break;
 285         case IW_CM_EVENT_DISCONNECT:
 286                 break;
 287         case IW_CM_EVENT_CLOSE:
 288                 break;
 289         default:
 290                 i40iw_pr_err("event type received type = %d\n", type);
 291                 return -1;
 292         }
 293         return cm_id->event_handler(cm_id, &event);
 294 }
 295
 296 /**
 297  * i40iw_create_event - create cm event
 298  * @cm_node: connection's node
 299  * @type: Event type to generate
 300  */
 301 static struct i40iw_cm_event *i40iw_create_event(struct i40iw_cm_node *cm_node,
 302                                                  enum i40iw_cm_event_type type)
 303 {
 304         struct i40iw_cm_event *event;
 305
 306         if (!cm_node->cm_id)
 307                 return NULL;
 308
 309         event = kzalloc(sizeof(*event), GFP_ATOMIC);
 310
 311         if (!event)
 312                 return NULL;
 313
 314         event->type = type;
 315         event->cm_node = cm_node;
 316         memcpy(event->cm_info.rem_addr, cm_node->rem_addr, sizeof(event->cm_info.rem_addr));
 317         memcpy(event->cm_info.loc_addr, cm_node->loc_addr, sizeof(event->cm_info.loc_addr));
 318         event->cm_info.rem_port = cm_node->rem_port;
 319         event->cm_info.loc_port = cm_node->loc_port;
 320         event->cm_info.cm_id = cm_node->cm_id;
 321
 322         i40iw_debug(cm_node->dev,
 323                     I40IW_DEBUG_CM,
 324                     "node=%p event=%p type=%u dst=%pI4 src=%pI4\n",
 325                     cm_node,
 326                     event,
 327                     type,
 328                     event->cm_info.loc_addr,
 329                     event->cm_info.rem_addr);
 330
 331         i40iw_cm_post_event(event);
 332         return event;
 333 }
 334
 335 /**
 336  * i40iw_free_retrans_entry - free send entry
 337  * @cm_node: connection's node
 338  */
 339 static void i40iw_free_retrans_entry(struct i40iw_cm_node *cm_node)
 340 {
 341         struct i40iw_device *iwdev = cm_node->iwdev;
 342         struct i40iw_timer_entry *send_entry;
 343
 344         send_entry = cm_node->send_entry;
 345         if (send_entry) {
 346                 cm_node->send_entry = NULL;
 347                 i40iw_free_sqbuf(&iwdev->vsi, (void *)send_entry->sqbuf);
 348                 kfree(send_entry);
 349                 atomic_dec(&cm_node->ref_count);
 350         }
 351 }
 352
 353 /**
 354  * i40iw_cleanup_retrans_entry - free send entry with lock
 355  * @cm_node: connection's node
 356  */
 357 static void i40iw_cleanup_retrans_entry(struct i40iw_cm_node *cm_node)
 358 {
 359         unsigned long flags;
 360
 361         spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
 362         i40iw_free_retrans_entry(cm_node);
 363         spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
 364 }
 365
 366 /**
 367  * i40iw_form_cm_frame - get a free packet and build frame
 368  * @cm_node: connection's node ionfo to use in frame
 369  * @options: pointer to options info
 370  * @hdr: pointer mpa header
 371  * @pdata: pointer to private data
 372  * @flags:  indicates FIN or ACK
 373  */
 374 static struct i40iw_puda_buf *i40iw_form_cm_frame(struct i40iw_cm_node *cm_node,
 375                                                   struct i40iw_kmem_info *options,
 376                                                   struct i40iw_kmem_info *hdr,
 377                                                   struct i40iw_kmem_info *pdata,
 378                                                   u8 flags)
 379 {
 380         struct i40iw_puda_buf *sqbuf;
 381         struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi;
 382         u8 *buf;
 383
 384         struct tcphdr *tcph;
 385         struct iphdr *iph;
 386         struct ipv6hdr *ip6h;
 387         struct ethhdr *ethh;
 388         u16 packetsize;
 389         u16 eth_hlen = ETH_HLEN;
 390         u32 opts_len = 0;
 391         u32 pd_len = 0;
 392         u32 hdr_len = 0;
 393         u16 vtag;
 394
 395         sqbuf = i40iw_puda_get_bufpool(vsi->ilq);
 396         if (!sqbuf)
 397                 return NULL;
 398         buf = sqbuf->mem.va;
 399
 400         if (options)
 401                 opts_len = (u32)options->size;
 402
 403         if (hdr)
 404                 hdr_len = hdr->size;
 405
 406         if (pdata)
 407                 pd_len = pdata->size;
 408
 409         if (cm_node->vlan_id < VLAN_TAG_PRESENT)
 410                 eth_hlen += 4;
 411
 412         if (cm_node->ipv4)
 413                 packetsize = sizeof(*iph) + sizeof(*tcph);
 414         else
 415                 packetsize = sizeof(*ip6h) + sizeof(*tcph);
 416         packetsize += opts_len + hdr_len + pd_len;
 417
 418         memset(buf, 0x00, eth_hlen + packetsize);
 419
 420         sqbuf->totallen = packetsize + eth_hlen;
 421         sqbuf->maclen = eth_hlen;
 422         sqbuf->tcphlen = sizeof(*tcph) + opts_len;
 423         sqbuf->scratch = (void *)cm_node;
 424
 425         ethh = (struct ethhdr *)buf;
 426         buf += eth_hlen;
 427
 428         if (cm_node->ipv4) {
 429                 sqbuf->ipv4 = true;
 430
 431                 iph = (struct iphdr *)buf;
 432                 buf += sizeof(*iph);
 433                 tcph = (struct tcphdr *)buf;
 434                 buf += sizeof(*tcph);
 435
 436                 ether_addr_copy(ethh->h_dest, cm_node->rem_mac);
 437                 ether_addr_copy(ethh->h_source, cm_node->loc_mac);
 438                 if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
 439                         ((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q);
 440                         vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) | cm_node->vlan_id;
 441                         ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(vtag);
 442
 443                         ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IP);
 444                 } else {
 445                         ethh->h_proto = htons(ETH_P_IP);
 446                 }
 447
 448                 iph->version = IPVERSION;
 449                 iph->ihl = 5;   /* 5 * 4Byte words, IP headr len */
 450                 iph->tos = cm_node->tos;
 451                 iph->tot_len = htons(packetsize);
 452                 iph->id = htons(++cm_node->tcp_cntxt.loc_id);
 453
 454                 iph->frag_off = htons(0x4000);
 455                 iph->ttl = 0x40;
 456                 iph->protocol = IPPROTO_TCP;
 457                 iph->saddr = htonl(cm_node->loc_addr[0]);
 458                 iph->daddr = htonl(cm_node->rem_addr[0]);
 459         } else {
 460                 sqbuf->ipv4 = false;
 461                 ip6h = (struct ipv6hdr *)buf;
 462                 buf += sizeof(*ip6h);
 463                 tcph = (struct tcphdr *)buf;
 464                 buf += sizeof(*tcph);
 465
 466                 ether_addr_copy(ethh->h_dest, cm_node->rem_mac);
 467                 ether_addr_copy(ethh->h_source, cm_node->loc_mac);
 468                 if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
 469                         ((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q);
 470                         vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) | cm_node->vlan_id;
 471                         ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(vtag);
 472                         ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IPV6);
 473                 } else {
 474                         ethh->h_proto = htons(ETH_P_IPV6);
 475                 }
 476                 ip6h->version = 6;
 477                 ip6h->priority = cm_node->tos >> 4;
 478                 ip6h->flow_lbl[0] = cm_node->tos << 4;
 479                 ip6h->flow_lbl[1] = 0;
 480                 ip6h->flow_lbl[2] = 0;
 481                 ip6h->payload_len = htons(packetsize - sizeof(*ip6h));
 482                 ip6h->nexthdr = 6;
 483                 ip6h->hop_limit = 128;
 484                 i40iw_copy_ip_htonl(ip6h->saddr.in6_u.u6_addr32,
 485                                     cm_node->loc_addr);
 486                 i40iw_copy_ip_htonl(ip6h->daddr.in6_u.u6_addr32,
 487                                     cm_node->rem_addr);
 488         }
 489
 490         tcph->source = htons(cm_node->loc_port);
 491         tcph->dest = htons(cm_node->rem_port);
 492
 493         tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
 494
 495         if (flags & SET_ACK) {
 496                 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
 497                 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
 498                 tcph->ack = 1;
 499         } else {
 500                 tcph->ack_seq = 0;
 501         }
 502
 503         if (flags & SET_SYN) {
 504                 cm_node->tcp_cntxt.loc_seq_num++;
 505                 tcph->syn = 1;
 506         } else {
 507                 cm_node->tcp_cntxt.loc_seq_num += hdr_len + pd_len;
 508         }
 509
 510         if (flags & SET_FIN) {
 511                 cm_node->tcp_cntxt.loc_seq_num++;
 512                 tcph->fin = 1;
 513         }
 514
 515         if (flags & SET_RST)
 516                 tcph->rst = 1;
 517
 518         tcph->doff = (u16)((sizeof(*tcph) + opts_len + 3) >> 2);
 519         sqbuf->tcphlen = tcph->doff << 2;
 520         tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
 521         tcph->urg_ptr = 0;
 522
 523         if (opts_len) {
 524                 memcpy(buf, options->addr, opts_len);
 525                 buf += opts_len;
 526         }
 527
 528         if (hdr_len) {
 529                 memcpy(buf, hdr->addr, hdr_len);
 530                 buf += hdr_len;
 531         }
 532
 533         if (pdata && pdata->addr)
 534                 memcpy(buf, pdata->addr, pdata->size);
 535
 536         atomic_set(&sqbuf->refcount, 1);
 537
 538         return sqbuf;
 539 }
 540
 541 /**
 542  * i40iw_send_reset - Send RST packet
 543  * @cm_node: connection's node
 544  */
 545 static int i40iw_send_reset(struct i40iw_cm_node *cm_node)
 546 {
 547         struct i40iw_puda_buf *sqbuf;
 548         int flags = SET_RST | SET_ACK;
 549
 550         sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, flags);
 551         if (!sqbuf) {
 552                 i40iw_pr_err("no sqbuf\n");
 553                 return -1;
 554         }
 555
 556         return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 0, 1);
 557 }
 558
 559 /**
 560  * i40iw_active_open_err - send event for active side cm error
 561  * @cm_node: connection's node
 562  * @reset: Flag to send reset or not
 563  */
 564 static void i40iw_active_open_err(struct i40iw_cm_node *cm_node, bool reset)
 565 {
 566         i40iw_cleanup_retrans_entry(cm_node);
 567         cm_node->cm_core->stats_connect_errs++;
 568         if (reset) {
 569                 i40iw_debug(cm_node->dev,
 570                             I40IW_DEBUG_CM,
 571                             "%s cm_node=%p state=%d\n",
 572                             __func__,
 573                             cm_node,
 574                             cm_node->state);
 575                 atomic_inc(&cm_node->ref_count);
 576                 i40iw_send_reset(cm_node);
 577         }
 578
 579         cm_node->state = I40IW_CM_STATE_CLOSED;
 580         i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
 581 }
 582
 583 /**
 584  * i40iw_passive_open_err - handle passive side cm error
 585  * @cm_node: connection's node
 586  * @reset: send reset or just free cm_node
 587  */
 588 static void i40iw_passive_open_err(struct i40iw_cm_node *cm_node, bool reset)
 589 {
 590         i40iw_cleanup_retrans_entry(cm_node);
 591         cm_node->cm_core->stats_passive_errs++;
 592         cm_node->state = I40IW_CM_STATE_CLOSED;
 593         i40iw_debug(cm_node->dev,
 594                     I40IW_DEBUG_CM,
 595                     "%s cm_node=%p state =%d\n",
 596                     __func__,
 597                     cm_node,
 598                     cm_node->state);
 599         if (reset)
 600                 i40iw_send_reset(cm_node);
 601         else
 602                 i40iw_rem_ref_cm_node(cm_node);
 603 }
 604
 605 /**
 606  * i40iw_event_connect_error - to create connect error event
 607  * @event: cm information for connect event
 608  */
 609 static void i40iw_event_connect_error(struct i40iw_cm_event *event)
 610 {
 611         struct i40iw_qp *iwqp;
 612         struct iw_cm_id *cm_id;
 613
 614         cm_id = event->cm_node->cm_id;
 615         if (!cm_id)
 616                 return;
 617
 618         iwqp = cm_id->provider_data;
 619
 620         if (!iwqp || !iwqp->iwdev)
 621                 return;
 622
 623         iwqp->cm_id = NULL;
 624         cm_id->provider_data = NULL;
 625         i40iw_send_cm_event(event->cm_node, cm_id,
 626                             IW_CM_EVENT_CONNECT_REPLY,
 627                             -ECONNRESET);
 628         cm_id->rem_ref(cm_id);
 629         i40iw_rem_ref_cm_node(event->cm_node);
 630 }
 631
 632 /**
 633  * i40iw_process_options
 634  * @cm_node: connection's node
 635  * @optionsloc: point to start of options
 636  * @optionsize: size of all options
 637  * @syn_packet: flag if syn packet
 638  */
 639 static int i40iw_process_options(struct i40iw_cm_node *cm_node,
 640                                  u8 *optionsloc,
 641                                  u32 optionsize,
 642                                  u32 syn_packet)
 643 {
 644         u32 tmp;
 645         u32 offset = 0;
 646         union all_known_options *all_options;
 647         char got_mss_option = 0;
 648
 649         while (offset < optionsize) {
 650                 all_options = (union all_known_options *)(optionsloc + offset);
 651                 switch (all_options->as_base.optionnum) {
 652                 case OPTION_NUMBER_END:
 653                         offset = optionsize;
 654                         break;
 655                 case OPTION_NUMBER_NONE:
 656                         offset += 1;
 657                         continue;
 658                 case OPTION_NUMBER_MSS:
 659                         i40iw_debug(cm_node->dev,
 660                                     I40IW_DEBUG_CM,
 661                                     "%s: MSS Length: %d Offset: %d Size: %d\n",
 662                                     __func__,
 663                                     all_options->as_mss.length,
 664                                     offset,
 665                                     optionsize);
 666                         got_mss_option = 1;
 667                         if (all_options->as_mss.length != 4)
 668                                 return -1;
 669                         tmp = ntohs(all_options->as_mss.mss);
 670                         if (tmp > 0 && tmp < cm_node->tcp_cntxt.mss)
 671                                 cm_node->tcp_cntxt.mss = tmp;
 672                         break;
 673                 case OPTION_NUMBER_WINDOW_SCALE:
 674                         cm_node->tcp_cntxt.snd_wscale =
 675                             all_options->as_windowscale.shiftcount;
 676                         break;
 677                 default:
 678                         i40iw_debug(cm_node->dev,
 679                                     I40IW_DEBUG_CM,
 680                                     "TCP Option not understood: %x\n",
 681                                     all_options->as_base.optionnum);
 682                         break;
 683                 }
 684                 offset += all_options->as_base.length;
 685         }
 686         if (!got_mss_option && syn_packet)
 687                 cm_node->tcp_cntxt.mss = I40IW_CM_DEFAULT_MSS;
 688         return 0;
 689 }
 690
 691 /**
 692  * i40iw_handle_tcp_options -
 693  * @cm_node: connection's node
 694  * @tcph: pointer tcp header
 695  * @optionsize: size of options rcvd
 696  * @passive: active or passive flag
 697  */
 698 static int i40iw_handle_tcp_options(struct i40iw_cm_node *cm_node,
 699                                     struct tcphdr *tcph,
 700                                     int optionsize,
 701                                     int passive)
 702 {
 703         u8 *optionsloc = (u8 *)&tcph[1];
 704
 705         if (optionsize) {
 706                 if (i40iw_process_options(cm_node,
 707                                           optionsloc,
 708                                           optionsize,
 709                                           (u32)tcph->syn)) {
 710                         i40iw_debug(cm_node->dev,
 711                                     I40IW_DEBUG_CM,
 712                                     "%s: Node %p, Sending RESET\n",
 713                                     __func__,
 714                                     cm_node);
 715                         if (passive)
 716                                 i40iw_passive_open_err(cm_node, true);
 717                         else
 718                                 i40iw_active_open_err(cm_node, true);
 719                         return -1;
 720                 }
 721         }
 722
 723         cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
 724             cm_node->tcp_cntxt.snd_wscale;
 725
 726         if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
 727                 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
 728         return 0;
 729 }
 730
 731 /**
 732  * i40iw_build_mpa_v1 - build a MPA V1 frame
 733  * @cm_node: connection's node
 734  * @mpa_key: to do read0 or write0
 735  */
 736 static void i40iw_build_mpa_v1(struct i40iw_cm_node *cm_node,
 737                                void *start_addr,
 738                                u8 mpa_key)
 739 {
 740         struct ietf_mpa_v1 *mpa_frame = (struct ietf_mpa_v1 *)start_addr;
 741
 742         switch (mpa_key) {
 743         case MPA_KEY_REQUEST:
 744                 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
 745                 break;
 746         case MPA_KEY_REPLY:
 747                 memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
 748                 break;
 749         default:
 750                 break;
 751         }
 752         mpa_frame->flags = IETF_MPA_FLAGS_CRC;
 753         mpa_frame->rev = cm_node->mpa_frame_rev;
 754         mpa_frame->priv_data_len = htons(cm_node->pdata.size);
 755 }
 756
 757 /**
 758  * i40iw_build_mpa_v2 - build a MPA V2 frame
 759  * @cm_node: connection's node
 760  * @start_addr: buffer start address
 761  * @mpa_key: to do read0 or write0
 762  */
 763 static void i40iw_build_mpa_v2(struct i40iw_cm_node *cm_node,
 764                                void *start_addr,
 765                                u8 mpa_key)
 766 {
 767         struct ietf_mpa_v2 *mpa_frame = (struct ietf_mpa_v2 *)start_addr;
 768         struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg;
 769         u16 ctrl_ird, ctrl_ord;
 770
 771         /* initialize the upper 5 bytes of the frame */
 772         i40iw_build_mpa_v1(cm_node, start_addr, mpa_key);
 773         mpa_frame->flags |= IETF_MPA_V2_FLAG;
 774         mpa_frame->priv_data_len += htons(IETF_RTR_MSG_SIZE);
 775
 776         /* initialize RTR msg */
 777         if (cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) {
 778                 ctrl_ird = IETF_NO_IRD_ORD;
 779                 ctrl_ord = IETF_NO_IRD_ORD;
 780         } else {
 781                 ctrl_ird = (cm_node->ird_size > IETF_NO_IRD_ORD) ?
 782                         IETF_NO_IRD_ORD : cm_node->ird_size;
 783                 ctrl_ord = (cm_node->ord_size > IETF_NO_IRD_ORD) ?
 784                         IETF_NO_IRD_ORD : cm_node->ord_size;
 785         }
 786
 787         ctrl_ird |= IETF_PEER_TO_PEER;
 788
 789         switch (mpa_key) {
 790         case MPA_KEY_REQUEST:
 791                 ctrl_ord |= IETF_RDMA0_WRITE;
 792                 ctrl_ord |= IETF_RDMA0_READ;
 793                 break;
 794         case MPA_KEY_REPLY:
 795                 switch (cm_node->send_rdma0_op) {
 796                 case SEND_RDMA_WRITE_ZERO:
 797                         ctrl_ord |= IETF_RDMA0_WRITE;
 798                         break;
 799                 case SEND_RDMA_READ_ZERO:
 800                         ctrl_ord |= IETF_RDMA0_READ;
 801                         break;
 802                 }
 803                 break;
 804         default:
 805                 break;
 806         }
 807         rtr_msg->ctrl_ird = htons(ctrl_ird);
 808         rtr_msg->ctrl_ord = htons(ctrl_ord);
 809 }
 810
 811 /**
 812  * i40iw_cm_build_mpa_frame - build mpa frame for mpa version 1 or version 2
 813  * @cm_node: connection's node
 814  * @mpa: mpa: data buffer
 815  * @mpa_key: to do read0 or write0
 816  */
 817 static int i40iw_cm_build_mpa_frame(struct i40iw_cm_node *cm_node,
 818                                     struct i40iw_kmem_info *mpa,
 819                                     u8 mpa_key)
 820 {
 821         int hdr_len = 0;
 822
 823         switch (cm_node->mpa_frame_rev) {
 824         case IETF_MPA_V1:
 825                 hdr_len = sizeof(struct ietf_mpa_v1);
 826                 i40iw_build_mpa_v1(cm_node, mpa->addr, mpa_key);
 827                 break;
 828         case IETF_MPA_V2:
 829                 hdr_len = sizeof(struct ietf_mpa_v2);
 830                 i40iw_build_mpa_v2(cm_node, mpa->addr, mpa_key);
 831                 break;
 832         default:
 833                 break;
 834         }
 835
 836         return hdr_len;
 837 }
 838
 839 /**
 840  * i40iw_send_mpa_request - active node send mpa request to passive node
 841  * @cm_node: connection's node
 842  */
 843 static int i40iw_send_mpa_request(struct i40iw_cm_node *cm_node)
 844 {
 845         struct i40iw_puda_buf *sqbuf;
 846
 847         if (!cm_node) {
 848                 i40iw_pr_err("cm_node == NULL\n");
 849                 return -1;
 850         }
 851
 852         cm_node->mpa_hdr.addr = &cm_node->mpa_frame;
 853         cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node,
 854                                                          &cm_node->mpa_hdr,
 855                                                          MPA_KEY_REQUEST);
 856         if (!cm_node->mpa_hdr.size) {
 857                 i40iw_pr_err("mpa size = %d\n", cm_node->mpa_hdr.size);
 858                 return -1;
 859         }
 860
 861         sqbuf = i40iw_form_cm_frame(cm_node,
 862                                     NULL,
 863                                     &cm_node->mpa_hdr,
 864                                     &cm_node->pdata,
 865                                     SET_ACK);
 866         if (!sqbuf) {
 867                 i40iw_pr_err("sq_buf == NULL\n");
 868                 return -1;
 869         }
 870         return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
 871 }
 872
 873 /**
 874  * i40iw_send_mpa_reject -
 875  * @cm_node: connection's node
 876  * @pdata: reject data for connection
 877  * @plen: length of reject data
 878  */
 879 static int i40iw_send_mpa_reject(struct i40iw_cm_node *cm_node,
 880                                  const void *pdata,
 881                                  u8 plen)
 882 {
 883         struct i40iw_puda_buf *sqbuf;
 884         struct i40iw_kmem_info priv_info;
 885
 886         cm_node->mpa_hdr.addr = &cm_node->mpa_frame;
 887         cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node,
 888                                                          &cm_node->mpa_hdr,
 889                                                          MPA_KEY_REPLY);
 890
 891         cm_node->mpa_frame.flags |= IETF_MPA_FLAGS_REJECT;
 892         priv_info.addr = (void *)pdata;
 893         priv_info.size = plen;
 894
 895         sqbuf = i40iw_form_cm_frame(cm_node,
 896                                     NULL,
 897                                     &cm_node->mpa_hdr,
 898                                     &priv_info,
 899                                     SET_ACK | SET_FIN);
 900         if (!sqbuf) {
 901                 i40iw_pr_err("no sqbuf\n");
 902                 return -ENOMEM;
 903         }
 904         cm_node->state = I40IW_CM_STATE_FIN_WAIT1;
 905         return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
 906 }
 907
 908 /**
 909  * recv_mpa - process an IETF MPA frame
 910  * @cm_node: connection's node
 911  * @buffer: Data pointer
 912  * @type: to return accept or reject
 913  * @len: Len of mpa buffer
 914  */
 915 static int i40iw_parse_mpa(struct i40iw_cm_node *cm_node, u8 *buffer, u32 *type, u32 len)
 916 {
 917         struct ietf_mpa_v1 *mpa_frame;
 918         struct ietf_mpa_v2 *mpa_v2_frame;
 919         struct ietf_rtr_msg *rtr_msg;
 920         int mpa_hdr_len;
 921         int priv_data_len;
 922
 923         *type = I40IW_MPA_REQUEST_ACCEPT;
 924
 925         if (len < sizeof(struct ietf_mpa_v1)) {
 926                 i40iw_pr_err("ietf buffer small (%x)\n", len);
 927                 return -1;
 928         }
 929
 930         mpa_frame = (struct ietf_mpa_v1 *)buffer;
 931         mpa_hdr_len = sizeof(struct ietf_mpa_v1);
 932         priv_data_len = ntohs(mpa_frame->priv_data_len);
 933
 934         if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) {
 935                 i40iw_pr_err("large pri_data %d\n", priv_data_len);
 936                 return -1;
 937         }
 938         if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) {
 939                 i40iw_pr_err("unsupported mpa rev = %d\n", mpa_frame->rev);
 940                 return -1;
 941         }
 942         if (mpa_frame->rev > cm_node->mpa_frame_rev) {
 943                 i40iw_pr_err("rev %d\n", mpa_frame->rev);
 944                 return -1;
 945         }
 946         cm_node->mpa_frame_rev = mpa_frame->rev;
 947
 948         if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) {
 949                 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) {
 950                         i40iw_pr_err("Unexpected MPA Key received\n");
 951                         return -1;
 952                 }
 953         } else {
 954                 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) {
 955                         i40iw_pr_err("Unexpected MPA Key received\n");
 956                         return -1;
 957                 }
 958         }
 959
 960         if (priv_data_len + mpa_hdr_len > len) {
 961                 i40iw_pr_err("ietf buffer len(%x + %x != %x)\n",
 962                              priv_data_len, mpa_hdr_len, len);
 963                 return -1;
 964         }
 965         if (len > MAX_CM_BUFFER) {
 966                 i40iw_pr_err("ietf buffer large len = %d\n", len);
 967                 return -1;
 968         }
 969
 970         switch (mpa_frame->rev) {
 971         case IETF_MPA_V2:{
 972                         u16 ird_size;
 973                         u16 ord_size;
 974                         u16 ctrl_ord;
 975                         u16 ctrl_ird;
 976
 977                         mpa_v2_frame = (struct ietf_mpa_v2 *)buffer;
 978                         mpa_hdr_len += IETF_RTR_MSG_SIZE;
 979                         rtr_msg = &mpa_v2_frame->rtr_msg;
 980
 981                         /* parse rtr message */
 982                         ctrl_ord = ntohs(rtr_msg->ctrl_ord);
 983                         ctrl_ird = ntohs(rtr_msg->ctrl_ird);
 984                         ird_size = ctrl_ird & IETF_NO_IRD_ORD;
 985                         ord_size = ctrl_ord & IETF_NO_IRD_ORD;
 986
 987                         if (!(ctrl_ird & IETF_PEER_TO_PEER))
 988                                 return -1;
 989
 990                         if (ird_size == IETF_NO_IRD_ORD || ord_size == IETF_NO_IRD_ORD) {
 991                                 cm_node->mpav2_ird_ord = IETF_NO_IRD_ORD;
 992                                 goto negotiate_done;
 993                         }
 994
 995                         if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) {
 996                                 /* responder */
 997                                 if (!ord_size && (ctrl_ord & IETF_RDMA0_READ))
 998                                         cm_node->ird_size = 1;
 999                                 if (cm_node->ord_size > ird_size)
1000                                         cm_node->ord_size = ird_size;
1001                         } else {
1002                                 /* initiator */
1003                                 if (!ird_size && (ctrl_ord & IETF_RDMA0_READ))
1004                                         return -1;
1005                                 if (cm_node->ord_size > ird_size)
1006                                         cm_node->ord_size = ird_size;
1007
1008                                 if (cm_node->ird_size < ord_size)
1009                                         /* no resources available */
1010                                         return -1;
1011                         }
1012
1013 negotiate_done:
1014                         if (ctrl_ord & IETF_RDMA0_READ)
1015                                 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
1016                         else if (ctrl_ord & IETF_RDMA0_WRITE)
1017                                 cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO;
1018                         else    /* Not supported RDMA0 operation */
1019                                 return -1;
1020                         i40iw_debug(cm_node->dev, I40IW_DEBUG_CM,
1021                                     "MPAV2: Negotiated ORD: %d, IRD: %d\n",
1022                                     cm_node->ord_size, cm_node->ird_size);
1023                         break;
1024                 }
1025                 break;
1026         case IETF_MPA_V1:
1027         default:
1028                 break;
1029         }
1030
1031         memcpy(cm_node->pdata_buf, buffer + mpa_hdr_len, priv_data_len);
1032         cm_node->pdata.size = priv_data_len;
1033
1034         if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT)
1035                 *type = I40IW_MPA_REQUEST_REJECT;
1036
1037         if (mpa_frame->flags & IETF_MPA_FLAGS_MARKERS)
1038                 cm_node->snd_mark_en = true;
1039
1040         return 0;
1041 }
1042
1043 /**
1044  * i40iw_schedule_cm_timer
1045  * @@cm_node: connection's node
1046  * @sqbuf: buffer to send
1047  * @type: if it is send or close
1048  * @send_retrans: if rexmits to be done
1049  * @close_when_complete: is cm_node to be removed
1050  *
1051  * note - cm_node needs to be protected before calling this. Encase in:
1052  *              i40iw_rem_ref_cm_node(cm_core, cm_node);
1053  *              i40iw_schedule_cm_timer(...)
1054  *              atomic_inc(&cm_node->ref_count);
1055  */
1056 int i40iw_schedule_cm_timer(struct i40iw_cm_node *cm_node,
1057                             struct i40iw_puda_buf *sqbuf,
1058                             enum i40iw_timer_type type,
1059                             int send_retrans,
1060                             int close_when_complete)
1061 {
1062         struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi;
1063         struct i40iw_cm_core *cm_core = cm_node->cm_core;
1064         struct i40iw_timer_entry *new_send;
1065         int ret = 0;
1066         u32 was_timer_set;
1067         unsigned long flags;
1068
1069         new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
1070         if (!new_send) {
1071                 if (type != I40IW_TIMER_TYPE_CLOSE)
1072                         i40iw_free_sqbuf(vsi, (void *)sqbuf);
1073                 return -ENOMEM;
1074         }
1075         new_send->retrycount = I40IW_DEFAULT_RETRYS;
1076         new_send->retranscount = I40IW_DEFAULT_RETRANS;
1077         new_send->sqbuf = sqbuf;
1078         new_send->timetosend = jiffies;
1079         new_send->type = type;
1080         new_send->send_retrans = send_retrans;
1081         new_send->close_when_complete = close_when_complete;
1082
1083         if (type == I40IW_TIMER_TYPE_CLOSE) {
1084                 new_send->timetosend += (HZ / 10);
1085                 if (cm_node->close_entry) {
1086                         kfree(new_send);
1087                         i40iw_pr_err("already close entry\n");
1088                         return -EINVAL;
1089                 }
1090                 cm_node->close_entry = new_send;
1091         }
1092
1093         if (type == I40IW_TIMER_TYPE_SEND) {
1094                 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1095                 cm_node->send_entry = new_send;
1096                 atomic_inc(&cm_node->ref_count);
1097                 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1098                 new_send->timetosend = jiffies + I40IW_RETRY_TIMEOUT;
1099
1100                 atomic_inc(&sqbuf->refcount);
1101                 i40iw_puda_send_buf(vsi->ilq, sqbuf);
1102                 if (!send_retrans) {
1103                         i40iw_cleanup_retrans_entry(cm_node);
1104                         if (close_when_complete)
1105                                 i40iw_rem_ref_cm_node(cm_node);
1106                         return ret;
1107                 }
1108         }
1109
1110         spin_lock_irqsave(&cm_core->ht_lock, flags);
1111         was_timer_set = timer_pending(&cm_core->tcp_timer);
1112
1113         if (!was_timer_set) {
1114                 cm_core->tcp_timer.expires = new_send->timetosend;
1115                 add_timer(&cm_core->tcp_timer);
1116         }
1117         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1118
1119         return ret;
1120 }
1121
1122 /**
1123  * i40iw_retrans_expired - Could not rexmit the packet
1124  * @cm_node: connection's node
1125  */
1126 static void i40iw_retrans_expired(struct i40iw_cm_node *cm_node)
1127 {
1128         struct iw_cm_id *cm_id = cm_node->cm_id;
1129         enum i40iw_cm_node_state state = cm_node->state;
1130
1131         cm_node->state = I40IW_CM_STATE_CLOSED;
1132         switch (state) {
1133         case I40IW_CM_STATE_SYN_RCVD:
1134         case I40IW_CM_STATE_CLOSING:
1135                 i40iw_rem_ref_cm_node(cm_node);
1136                 break;
1137         case I40IW_CM_STATE_FIN_WAIT1:
1138         case I40IW_CM_STATE_LAST_ACK:
1139                 if (cm_node->cm_id)
1140                         cm_id->rem_ref(cm_id);
1141                 i40iw_send_reset(cm_node);
1142                 break;
1143         default:
1144                 atomic_inc(&cm_node->ref_count);
1145                 i40iw_send_reset(cm_node);
1146                 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
1147                 break;
1148         }
1149 }
1150
1151 /**
1152  * i40iw_handle_close_entry - for handling retry/timeouts
1153  * @cm_node: connection's node
1154  * @rem_node: flag for remove cm_node
1155  */
1156 static void i40iw_handle_close_entry(struct i40iw_cm_node *cm_node, u32 rem_node)
1157 {
1158         struct i40iw_timer_entry *close_entry = cm_node->close_entry;
1159         struct iw_cm_id *cm_id = cm_node->cm_id;
1160         struct i40iw_qp *iwqp;
1161         unsigned long flags;
1162
1163         if (!close_entry)
1164                 return;
1165         iwqp = (struct i40iw_qp *)close_entry->sqbuf;
1166         if (iwqp) {
1167                 spin_lock_irqsave(&iwqp->lock, flags);
1168                 if (iwqp->cm_id) {
1169                         iwqp->hw_tcp_state = I40IW_TCP_STATE_CLOSED;
1170                         iwqp->hw_iwarp_state = I40IW_QP_STATE_ERROR;
1171                         iwqp->last_aeq = I40IW_AE_RESET_SENT;
1172                         iwqp->ibqp_state = IB_QPS_ERR;
1173                         spin_unlock_irqrestore(&iwqp->lock, flags);
1174                         i40iw_cm_disconn(iwqp);
1175                 } else {
1176                         spin_unlock_irqrestore(&iwqp->lock, flags);
1177                 }
1178         } else if (rem_node) {
1179                 /* TIME_WAIT state */
1180                 i40iw_rem_ref_cm_node(cm_node);
1181         }
1182         if (cm_id)
1183                 cm_id->rem_ref(cm_id);
1184         kfree(close_entry);
1185         cm_node->close_entry = NULL;
1186 }
1187
1188 /**
1189  * i40iw_cm_timer_tick - system's timer expired callback
1190  * @pass: Pointing to cm_core
1191  */
1192 static void i40iw_cm_timer_tick(unsigned long pass)
1193 {
1194         unsigned long nexttimeout = jiffies + I40IW_LONG_TIME;
1195         struct i40iw_cm_node *cm_node;
1196         struct i40iw_timer_entry *send_entry, *close_entry;
1197         struct list_head *list_core_temp;
1198         struct i40iw_sc_vsi *vsi;
1199         struct list_head *list_node;
1200         struct i40iw_cm_core *cm_core = (struct i40iw_cm_core *)pass;
1201         u32 settimer = 0;
1202         unsigned long timetosend;
1203         struct i40iw_sc_dev *dev;
1204         unsigned long flags;
1205
1206         struct list_head timer_list;
1207
1208         INIT_LIST_HEAD(&timer_list);
1209         spin_lock_irqsave(&cm_core->ht_lock, flags);
1210
1211         list_for_each_safe(list_node, list_core_temp, &cm_core->connected_nodes) {
1212                 cm_node = container_of(list_node, struct i40iw_cm_node, list);
1213                 if (cm_node->close_entry || cm_node->send_entry) {
1214                         atomic_inc(&cm_node->ref_count);
1215                         list_add(&cm_node->timer_entry, &timer_list);
1216                 }
1217         }
1218         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1219
1220         list_for_each_safe(list_node, list_core_temp, &timer_list) {
1221                 cm_node = container_of(list_node,
1222                                        struct i40iw_cm_node,
1223                                        timer_entry);
1224                 close_entry = cm_node->close_entry;
1225
1226                 if (close_entry) {
1227                         if (time_after(close_entry->timetosend, jiffies)) {
1228                                 if (nexttimeout > close_entry->timetosend ||
1229                                     !settimer) {
1230                                         nexttimeout = close_entry->timetosend;
1231                                         settimer = 1;
1232                                 }
1233                         } else {
1234                                 i40iw_handle_close_entry(cm_node, 1);
1235                         }
1236                 }
1237
1238                 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1239
1240                 send_entry = cm_node->send_entry;
1241                 if (!send_entry)
1242                         goto done;
1243                 if (time_after(send_entry->timetosend, jiffies)) {
1244                         if (cm_node->state != I40IW_CM_STATE_OFFLOADED) {
1245                                 if ((nexttimeout > send_entry->timetosend) ||
1246                                     !settimer) {
1247                                         nexttimeout = send_entry->timetosend;
1248                                         settimer = 1;
1249                                 }
1250                         } else {
1251                                 i40iw_free_retrans_entry(cm_node);
1252                         }
1253                         goto done;
1254                 }
1255
1256                 if ((cm_node->state == I40IW_CM_STATE_OFFLOADED) ||
1257                     (cm_node->state == I40IW_CM_STATE_CLOSED)) {
1258                         i40iw_free_retrans_entry(cm_node);
1259                         goto done;
1260                 }
1261
1262                 if (!send_entry->retranscount || !send_entry->retrycount) {
1263                         i40iw_free_retrans_entry(cm_node);
1264
1265                         spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1266                         i40iw_retrans_expired(cm_node);
1267                         cm_node->state = I40IW_CM_STATE_CLOSED;
1268                         spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1269                         goto done;
1270                 }
1271                 cm_node->cm_core->stats_pkt_retrans++;
1272                 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1273
1274                 vsi = &cm_node->iwdev->vsi;
1275                 dev = cm_node->dev;
1276                 atomic_inc(&send_entry->sqbuf->refcount);
1277                 i40iw_puda_send_buf(vsi->ilq, send_entry->sqbuf);
1278                 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1279                 if (send_entry->send_retrans) {
1280                         send_entry->retranscount--;
1281                         timetosend = (I40IW_RETRY_TIMEOUT <<
1282                                       (I40IW_DEFAULT_RETRANS -
1283                                        send_entry->retranscount));
1284
1285                         send_entry->timetosend = jiffies +
1286                             min(timetosend, I40IW_MAX_TIMEOUT);
1287                         if (nexttimeout > send_entry->timetosend || !settimer) {
1288                                 nexttimeout = send_entry->timetosend;
1289                                 settimer = 1;
1290                         }
1291                 } else {
1292                         int close_when_complete;
1293
1294                         close_when_complete = send_entry->close_when_complete;
1295                         i40iw_debug(cm_node->dev,
1296                                     I40IW_DEBUG_CM,
1297                                     "cm_node=%p state=%d\n",
1298                                     cm_node,
1299                                     cm_node->state);
1300                         i40iw_free_retrans_entry(cm_node);
1301                         if (close_when_complete)
1302                                 i40iw_rem_ref_cm_node(cm_node);
1303                 }
1304 done:
1305                 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1306                 i40iw_rem_ref_cm_node(cm_node);
1307         }
1308
1309         if (settimer) {
1310                 spin_lock_irqsave(&cm_core->ht_lock, flags);
1311                 if (!timer_pending(&cm_core->tcp_timer)) {
1312                         cm_core->tcp_timer.expires = nexttimeout;
1313                         add_timer(&cm_core->tcp_timer);
1314                 }
1315                 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1316         }
1317 }
1318
1319 /**
1320  * i40iw_send_syn - send SYN packet
1321  * @cm_node: connection's node
1322  * @sendack: flag to set ACK bit or not
1323  */
1324 int i40iw_send_syn(struct i40iw_cm_node *cm_node, u32 sendack)
1325 {
1326         struct i40iw_puda_buf *sqbuf;
1327         int flags = SET_SYN;
1328         char optionsbuffer[sizeof(struct option_mss) +
1329                            sizeof(struct option_windowscale) +
1330                            sizeof(struct option_base) + TCP_OPTIONS_PADDING];
1331         struct i40iw_kmem_info opts;
1332
1333         int optionssize = 0;
1334         /* Sending MSS option */
1335         union all_known_options *options;
1336
1337         opts.addr = optionsbuffer;
1338         if (!cm_node) {
1339                 i40iw_pr_err("no cm_node\n");
1340                 return -EINVAL;
1341         }
1342
1343         options = (union all_known_options *)&optionsbuffer[optionssize];
1344         options->as_mss.optionnum = OPTION_NUMBER_MSS;
1345         options->as_mss.length = sizeof(struct option_mss);
1346         options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
1347         optionssize += sizeof(struct option_mss);
1348
1349         options = (union all_known_options *)&optionsbuffer[optionssize];
1350         options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
1351         options->as_windowscale.length = sizeof(struct option_windowscale);
1352         options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
1353         optionssize += sizeof(struct option_windowscale);
1354         options = (union all_known_options *)&optionsbuffer[optionssize];
1355         options->as_end = OPTION_NUMBER_END;
1356         optionssize += 1;
1357
1358         if (sendack)
1359                 flags |= SET_ACK;
1360
1361         opts.size = optionssize;
1362
1363         sqbuf = i40iw_form_cm_frame(cm_node, &opts, NULL, NULL, flags);
1364         if (!sqbuf) {
1365                 i40iw_pr_err("no sqbuf\n");
1366                 return -1;
1367         }
1368         return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
1369 }
1370
1371 /**
1372  * i40iw_send_ack - Send ACK packet
1373  * @cm_node: connection's node
1374  */
1375 static void i40iw_send_ack(struct i40iw_cm_node *cm_node)
1376 {
1377         struct i40iw_puda_buf *sqbuf;
1378         struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi;
1379
1380         sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK);
1381         if (sqbuf)
1382                 i40iw_puda_send_buf(vsi->ilq, sqbuf);
1383         else
1384                 i40iw_pr_err("no sqbuf\n");
1385 }
1386
1387 /**
1388  * i40iw_send_fin - Send FIN pkt
1389  * @cm_node: connection's node
1390  */
1391 static int i40iw_send_fin(struct i40iw_cm_node *cm_node)
1392 {
1393         struct i40iw_puda_buf *sqbuf;
1394
1395         sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK | SET_FIN);
1396         if (!sqbuf) {
1397                 i40iw_pr_err("no sqbuf\n");
1398                 return -1;
1399         }
1400         return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
1401 }
1402
1403 /**
1404  * i40iw_find_node - find a cm node that matches the reference cm node
1405  * @cm_core: cm's core
1406  * @rem_port: remote tcp port num
1407  * @rem_addr: remote ip addr
1408  * @loc_port: local tcp port num
1409  * @loc_addr: loc ip addr
1410  * @add_refcnt: flag to increment refcount of cm_node
1411  */
1412 struct i40iw_cm_node *i40iw_find_node(struct i40iw_cm_core *cm_core,
1413                                       u16 rem_port,
1414                                       u32 *rem_addr,
1415                                       u16 loc_port,
1416                                       u32 *loc_addr,
1417                                       bool add_refcnt)
1418 {
1419         struct list_head *hte;
1420         struct i40iw_cm_node *cm_node;
1421         unsigned long flags;
1422
1423         hte = &cm_core->connected_nodes;
1424
1425         /* walk list and find cm_node associated with this session ID */
1426         spin_lock_irqsave(&cm_core->ht_lock, flags);
1427         list_for_each_entry(cm_node, hte, list) {
1428                 if (!memcmp(cm_node->loc_addr, loc_addr, sizeof(cm_node->loc_addr)) &&
1429                     (cm_node->loc_port == loc_port) &&
1430                     !memcmp(cm_node->rem_addr, rem_addr, sizeof(cm_node->rem_addr)) &&
1431                     (cm_node->rem_port == rem_port)) {
1432                         if (add_refcnt)
1433                                 atomic_inc(&cm_node->ref_count);
1434                         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1435                         return cm_node;
1436                 }
1437         }
1438         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1439
1440         /* no owner node */
1441         return NULL;
1442 }
1443
1444 /**
1445  * i40iw_find_listener - find a cm node listening on this addr-port pair
1446  * @cm_core: cm's core
1447  * @dst_port: listener tcp port num
1448  * @dst_addr: listener ip addr
1449  * @listener_state: state to match with listen node's
1450  */
1451 static struct i40iw_cm_listener *i40iw_find_listener(
1452                                                      struct i40iw_cm_core *cm_core,
1453                                                      u32 *dst_addr,
1454                                                      u16 dst_port,
1455                                                      u16 vlan_id,
1456                                                      enum i40iw_cm_listener_state
1457                                                      listener_state)
1458 {
1459         struct i40iw_cm_listener *listen_node;
1460         static const u32 ip_zero[4] = { 0, 0, 0, 0 };
1461         u32 listen_addr[4];
1462         u16 listen_port;
1463         unsigned long flags;
1464
1465         /* walk list and find cm_node associated with this session ID */
1466         spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1467         list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
1468                 memcpy(listen_addr, listen_node->loc_addr, sizeof(listen_addr));
1469                 listen_port = listen_node->loc_port;
1470                 /* compare node pair, return node handle if a match */
1471                 if ((!memcmp(listen_addr, dst_addr, sizeof(listen_addr)) ||
1472                      !memcmp(listen_addr, ip_zero, sizeof(listen_addr))) &&
1473                      (listen_port == dst_port) &&
1474                      (listener_state & listen_node->listener_state)) {
1475                         atomic_inc(&listen_node->ref_count);
1476                         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1477                         return listen_node;
1478                 }
1479         }
1480         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1481         return NULL;
1482 }
1483
1484 /**
1485  * i40iw_add_hte_node - add a cm node to the hash table
1486  * @cm_core: cm's core
1487  * @cm_node: connection's node
1488  */
1489 static void i40iw_add_hte_node(struct i40iw_cm_core *cm_core,
1490                                struct i40iw_cm_node *cm_node)
1491 {
1492         struct list_head *hte;
1493         unsigned long flags;
1494
1495         if (!cm_node || !cm_core) {
1496                 i40iw_pr_err("cm_node or cm_core == NULL\n");
1497                 return;
1498         }
1499         spin_lock_irqsave(&cm_core->ht_lock, flags);
1500
1501         /* get a handle on the hash table element (list head for this slot) */
1502         hte = &cm_core->connected_nodes;
1503         list_add_tail(&cm_node->list, hte);
1504         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1505 }
1506
1507 /**
1508  * i40iw_port_in_use - determine if port is in use
1509  * @port: port number
1510  * @active_side: flag for listener side vs active side
1511  */
1512 static bool i40iw_port_in_use(struct i40iw_cm_core *cm_core, u16 port, bool active_side)
1513 {
1514         struct i40iw_cm_listener *listen_node;
1515         struct i40iw_cm_node *cm_node;
1516         unsigned long flags;
1517         bool ret = false;
1518
1519         if (active_side) {
1520                 /* search connected node list */
1521                 spin_lock_irqsave(&cm_core->ht_lock, flags);
1522                 list_for_each_entry(cm_node, &cm_core->connected_nodes, list) {
1523                         if (cm_node->loc_port == port) {
1524                                 ret = true;
1525                                 break;
1526                         }
1527                 }
1528                         if (!ret)
1529                                 clear_bit(port, cm_core->active_side_ports);
1530                 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1531         } else {
1532                 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1533                 list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
1534                         if (listen_node->loc_port == port) {
1535                                 ret = true;
1536                                 break;
1537                         }
1538                 }
1539                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1540         }
1541
1542         return ret;
1543 }
1544
1545 /**
1546  * i40iw_del_multiple_qhash - Remove qhash and child listens
1547  * @iwdev: iWarp device
1548  * @cm_info: CM info for parent listen node
1549  * @cm_parent_listen_node: The parent listen node
1550  */
1551 static enum i40iw_status_code i40iw_del_multiple_qhash(
1552                                                        struct i40iw_device *iwdev,
1553                                                        struct i40iw_cm_info *cm_info,
1554                                                        struct i40iw_cm_listener *cm_parent_listen_node)
1555 {
1556         struct i40iw_cm_listener *child_listen_node;
1557         enum i40iw_status_code ret = I40IW_ERR_CONFIG;
1558         struct list_head *pos, *tpos;
1559         unsigned long flags;
1560
1561         spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1562         list_for_each_safe(pos, tpos, &cm_parent_listen_node->child_listen_list) {
1563                 child_listen_node = list_entry(pos, struct i40iw_cm_listener, child_listen_list);
1564                 if (child_listen_node->ipv4)
1565                         i40iw_debug(&iwdev->sc_dev,
1566                                     I40IW_DEBUG_CM,
1567                                     "removing child listen for IP=%pI4, port=%d, vlan=%d\n",
1568                                     child_listen_node->loc_addr,
1569                                     child_listen_node->loc_port,
1570                                     child_listen_node->vlan_id);
1571                 else
1572                         i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM,
1573                                     "removing child listen for IP=%pI6, port=%d, vlan=%d\n",
1574                                     child_listen_node->loc_addr,
1575                                     child_listen_node->loc_port,
1576                                     child_listen_node->vlan_id);
1577                 list_del(pos);
1578                 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1579                        sizeof(cm_info->loc_addr));
1580                 cm_info->vlan_id = child_listen_node->vlan_id;
1581                 if (child_listen_node->qhash_set) {
1582                         ret = i40iw_manage_qhash(iwdev, cm_info,
1583                                                  I40IW_QHASH_TYPE_TCP_SYN,
1584                                                  I40IW_QHASH_MANAGE_TYPE_DELETE,
1585                                                  NULL, false);
1586                         child_listen_node->qhash_set = false;
1587                 } else {
1588                         ret = I40IW_SUCCESS;
1589                 }
1590                 i40iw_debug(&iwdev->sc_dev,
1591                             I40IW_DEBUG_CM,
1592                             "freed pointer = %p\n",
1593                             child_listen_node);
1594                 kfree(child_listen_node);
1595                 cm_parent_listen_node->cm_core->stats_listen_nodes_destroyed++;
1596         }
1597         spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1598
1599         return ret;
1600 }
1601
1602 /**
1603  * i40iw_netdev_vlan_ipv6 - Gets the netdev and vlan
1604  * @addr: local IPv6 address
1605  * @vlan_id: vlan id for the given IPv6 address
1606  *
1607  * Returns the net_device of the IPv6 address and also sets the
1608  * vlan id for that address.
1609  */
1610 static struct net_device *i40iw_netdev_vlan_ipv6(u32 *addr, u16 *vlan_id)
1611 {
1612         struct net_device *ip_dev = NULL;
1613         struct in6_addr laddr6;
1614
1615         if (!IS_ENABLED(CONFIG_IPV6))
1616                 return NULL;
1617         i40iw_copy_ip_htonl(laddr6.in6_u.u6_addr32, addr);
1618         if (vlan_id)
1619                 *vlan_id = I40IW_NO_VLAN;
1620         rcu_read_lock();
1621         for_each_netdev_rcu(&init_net, ip_dev) {
1622                 if (ipv6_chk_addr(&init_net, &laddr6, ip_dev, 1)) {
1623                         if (vlan_id)
1624                                 *vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1625                         break;
1626                 }
1627         }
1628         rcu_read_unlock();
1629         return ip_dev;
1630 }
1631
1632 /**
1633  * i40iw_get_vlan_ipv4 - Returns the vlan_id for IPv4 address
1634  * @addr: local IPv4 address
1635  */
1636 static u16 i40iw_get_vlan_ipv4(u32 *addr)
1637 {
1638         struct net_device *netdev;
1639         u16 vlan_id = I40IW_NO_VLAN;
1640
1641         netdev = ip_dev_find(&init_net, htonl(addr[0]));
1642         if (netdev) {
1643                 vlan_id = rdma_vlan_dev_vlan_id(netdev);
1644                 dev_put(netdev);
1645         }
1646         return vlan_id;
1647 }
1648
1649 /**
1650  * i40iw_add_mqh_6 - Adds multiple qhashes for IPv6
1651  * @iwdev: iWarp device
1652  * @cm_info: CM info for parent listen node
1653  * @cm_parent_listen_node: The parent listen node
1654  *
1655  * Adds a qhash and a child listen node for every IPv6 address
1656  * on the adapter and adds the associated qhash filter
1657  */
1658 static enum i40iw_status_code i40iw_add_mqh_6(struct i40iw_device *iwdev,
1659                                               struct i40iw_cm_info *cm_info,
1660                                               struct i40iw_cm_listener *cm_parent_listen_node)
1661 {
1662         struct net_device *ip_dev;
1663         struct inet6_dev *idev;
1664         struct inet6_ifaddr *ifp, *tmp;
1665         enum i40iw_status_code ret = 0;
1666         struct i40iw_cm_listener *child_listen_node;
1667         unsigned long flags;
1668
1669         rtnl_lock();
1670         for_each_netdev(&init_net, ip_dev) {
1671                 if ((((rdma_vlan_dev_vlan_id(ip_dev) < I40IW_NO_VLAN) &&
1672                       (rdma_vlan_dev_real_dev(ip_dev) == iwdev->netdev)) ||
1673                      (ip_dev == iwdev->netdev)) && (ip_dev->flags & IFF_UP)) {
1674                         idev = __in6_dev_get(ip_dev);
1675                         if (!idev) {
1676                                 i40iw_pr_err("idev == NULL\n");
1677                                 break;
1678                         }
1679                         list_for_each_entry_safe(ifp, tmp, &idev->addr_list, if_list) {
1680                                 i40iw_debug(&iwdev->sc_dev,
1681                                             I40IW_DEBUG_CM,
1682                                             "IP=%pI6, vlan_id=%d, MAC=%pM\n",
1683                                             &ifp->addr,
1684                                             rdma_vlan_dev_vlan_id(ip_dev),
1685                                             ip_dev->dev_addr);
1686                                 child_listen_node =
1687                                         kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
1688                                 i40iw_debug(&iwdev->sc_dev,
1689                                             I40IW_DEBUG_CM,
1690                                             "Allocating child listener %p\n",
1691                                             child_listen_node);
1692                                 if (!child_listen_node) {
1693                                         ret = I40IW_ERR_NO_MEMORY;
1694                                         goto exit;
1695                                 }
1696                                 cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1697                                 cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1698
1699                                 memcpy(child_listen_node, cm_parent_listen_node,
1700                                        sizeof(*child_listen_node));
1701
1702                                 i40iw_copy_ip_ntohl(child_listen_node->loc_addr,
1703                                                     ifp->addr.in6_u.u6_addr32);
1704                                 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1705                                        sizeof(cm_info->loc_addr));
1706
1707                                 ret = i40iw_manage_qhash(iwdev, cm_info,
1708                                                          I40IW_QHASH_TYPE_TCP_SYN,
1709                                                          I40IW_QHASH_MANAGE_TYPE_ADD,
1710                                                          NULL, true);
1711                                 if (!ret) {
1712                                         child_listen_node->qhash_set = true;
1713                                         spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1714                                         list_add(&child_listen_node->child_listen_list,
1715                                                  &cm_parent_listen_node->child_listen_list);
1716                                         spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1717                                         cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
1718                                 } else {
1719                                         kfree(child_listen_node);
1720                                 }
1721                         }
1722                 }
1723         }
1724 exit:
1725         rtnl_unlock();
1726         return ret;
1727 }
1728
1729 /**
1730  * i40iw_add_mqh_4 - Adds multiple qhashes for IPv4
1731  * @iwdev: iWarp device
1732  * @cm_info: CM info for parent listen node
1733  * @cm_parent_listen_node: The parent listen node
1734  *
1735  * Adds a qhash and a child listen node for every IPv4 address
1736  * on the adapter and adds the associated qhash filter
1737  */
1738 static enum i40iw_status_code i40iw_add_mqh_4(
1739                                 struct i40iw_device *iwdev,
1740                                 struct i40iw_cm_info *cm_info,
1741                                 struct i40iw_cm_listener *cm_parent_listen_node)
1742 {
1743         struct net_device *dev;
1744         struct in_device *idev;
1745         struct i40iw_cm_listener *child_listen_node;
1746         enum i40iw_status_code ret = 0;
1747         unsigned long flags;
1748
1749         rtnl_lock();
1750         for_each_netdev(&init_net, dev) {
1751                 if ((((rdma_vlan_dev_vlan_id(dev) < I40IW_NO_VLAN) &&
1752                       (rdma_vlan_dev_real_dev(dev) == iwdev->netdev)) ||
1753                     (dev == iwdev->netdev)) && (dev->flags & IFF_UP)) {
1754                         idev = in_dev_get(dev);
1755                         for_ifa(idev) {
1756                                 i40iw_debug(&iwdev->sc_dev,
1757                                             I40IW_DEBUG_CM,
1758                                             "Allocating child CM Listener forIP=%pI4, vlan_id=%d, MAC=%pM\n",
1759                                             &ifa->ifa_address,
1760                                             rdma_vlan_dev_vlan_id(dev),
1761                                             dev->dev_addr);
1762                                 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
1763                                 cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
1764                                 i40iw_debug(&iwdev->sc_dev,
1765                                             I40IW_DEBUG_CM,
1766                                             "Allocating child listener %p\n",
1767                                             child_listen_node);
1768                                 if (!child_listen_node) {
1769                                         in_dev_put(idev);
1770                                         ret = I40IW_ERR_NO_MEMORY;
1771                                         goto exit;
1772                                 }
1773                                 cm_info->vlan_id = rdma_vlan_dev_vlan_id(dev);
1774                                 cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1775                                 memcpy(child_listen_node,
1776                                        cm_parent_listen_node,
1777                                        sizeof(*child_listen_node));
1778
1779                                 child_listen_node->loc_addr[0] = ntohl(ifa->ifa_address);
1780                                 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1781                                        sizeof(cm_info->loc_addr));
1782
1783                                 ret = i40iw_manage_qhash(iwdev,
1784                                                          cm_info,
1785                                                          I40IW_QHASH_TYPE_TCP_SYN,
1786                                                          I40IW_QHASH_MANAGE_TYPE_ADD,
1787                                                          NULL,
1788                                                          true);
1789                                 if (!ret) {
1790                                         child_listen_node->qhash_set = true;
1791                                         spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1792                                         list_add(&child_listen_node->child_listen_list,
1793                                                  &cm_parent_listen_node->child_listen_list);
1794                                         spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1795                                 } else {
1796                                         kfree(child_listen_node);
1797                                         cm_parent_listen_node->cm_core->stats_listen_nodes_created--;
1798                                 }
1799                         }
1800                         endfor_ifa(idev);
1801                         in_dev_put(idev);
1802                 }
1803         }
1804 exit:
1805         rtnl_unlock();
1806         return ret;
1807 }
1808
1809 /**
1810  * i40iw_dec_refcnt_listen - delete listener and associated cm nodes
1811  * @cm_core: cm's core
1812  * @free_hanging_nodes: to free associated cm_nodes
1813  * @apbvt_del: flag to delete the apbvt
1814  */
1815 static int i40iw_dec_refcnt_listen(struct i40iw_cm_core *cm_core,
1816                                    struct i40iw_cm_listener *listener,
1817                                    int free_hanging_nodes, bool apbvt_del)
1818 {
1819         int ret = -EINVAL;
1820         int err = 0;
1821         struct list_head *list_pos;
1822         struct list_head *list_temp;
1823         struct i40iw_cm_node *cm_node;
1824         struct list_head reset_list;
1825         struct i40iw_cm_info nfo;
1826         struct i40iw_cm_node *loopback;
1827         enum i40iw_cm_node_state old_state;
1828         unsigned long flags;
1829
1830         /* free non-accelerated child nodes for this listener */
1831         INIT_LIST_HEAD(&reset_list);
1832         if (free_hanging_nodes) {
1833                 spin_lock_irqsave(&cm_core->ht_lock, flags);
1834                 list_for_each_safe(list_pos, list_temp, &cm_core->connected_nodes) {
1835                         cm_node = container_of(list_pos, struct i40iw_cm_node, list);
1836                         if ((cm_node->listener == listener) && !cm_node->accelerated) {
1837                                 atomic_inc(&cm_node->ref_count);
1838                                 list_add(&cm_node->reset_entry, &reset_list);
1839                         }
1840                 }
1841                 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1842         }
1843
1844         list_for_each_safe(list_pos, list_temp, &reset_list) {
1845                 cm_node = container_of(list_pos, struct i40iw_cm_node, reset_entry);
1846                 loopback = cm_node->loopbackpartner;
1847                 if (cm_node->state >= I40IW_CM_STATE_FIN_WAIT1) {
1848                         i40iw_rem_ref_cm_node(cm_node);
1849                 } else {
1850                         if (!loopback) {
1851                                 i40iw_cleanup_retrans_entry(cm_node);
1852                                 err = i40iw_send_reset(cm_node);
1853                                 if (err) {
1854                                         cm_node->state = I40IW_CM_STATE_CLOSED;
1855                                         i40iw_pr_err("send reset\n");
1856                                 } else {
1857                                         old_state = cm_node->state;
1858                                         cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED;
1859                                         if (old_state != I40IW_CM_STATE_MPAREQ_RCVD)
1860                                                 i40iw_rem_ref_cm_node(cm_node);
1861                                 }
1862                         } else {
1863                                 struct i40iw_cm_event event;
1864
1865                                 event.cm_node = loopback;
1866                                 memcpy(event.cm_info.rem_addr,
1867                                        loopback->rem_addr, sizeof(event.cm_info.rem_addr));
1868                                 memcpy(event.cm_info.loc_addr,
1869                                        loopback->loc_addr, sizeof(event.cm_info.loc_addr));
1870                                 event.cm_info.rem_port = loopback->rem_port;
1871                                 event.cm_info.loc_port = loopback->loc_port;
1872                                 event.cm_info.cm_id = loopback->cm_id;
1873                                 event.cm_info.ipv4 = loopback->ipv4;
1874                                 atomic_inc(&loopback->ref_count);
1875                                 loopback->state = I40IW_CM_STATE_CLOSED;
1876                                 i40iw_event_connect_error(&event);
1877                                 cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED;
1878                                 i40iw_rem_ref_cm_node(cm_node);
1879                         }
1880                 }
1881         }
1882
1883         if (!atomic_dec_return(&listener->ref_count)) {
1884                 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1885                 list_del(&listener->list);
1886                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1887
1888                 if (listener->iwdev) {
1889                         if (apbvt_del && !i40iw_port_in_use(cm_core, listener->loc_port, false))
1890                                 i40iw_manage_apbvt(listener->iwdev,
1891                                                    listener->loc_port,
1892                                                    I40IW_MANAGE_APBVT_DEL);
1893
1894                         memcpy(nfo.loc_addr, listener->loc_addr, sizeof(nfo.loc_addr));
1895                         nfo.loc_port = listener->loc_port;
1896                         nfo.ipv4 = listener->ipv4;
1897                         nfo.vlan_id = listener->vlan_id;
1898                         nfo.user_pri = listener->user_pri;
1899
1900                         if (!list_empty(&listener->child_listen_list)) {
1901                                 i40iw_del_multiple_qhash(listener->iwdev, &nfo, listener);
1902                         } else {
1903                                 if (listener->qhash_set)
1904                                         i40iw_manage_qhash(listener->iwdev,
1905                                                            &nfo,
1906                                                            I40IW_QHASH_TYPE_TCP_SYN,
1907                                                            I40IW_QHASH_MANAGE_TYPE_DELETE,
1908                                                            NULL,
1909                                                            false);
1910                         }
1911                 }
1912
1913                 cm_core->stats_listen_destroyed++;
1914                 kfree(listener);
1915                 cm_core->stats_listen_nodes_destroyed++;
1916                 listener = NULL;
1917                 ret = 0;
1918         }
1919
1920         if (listener) {
1921                 if (atomic_read(&listener->pend_accepts_cnt) > 0)
1922                         i40iw_debug(cm_core->dev,
1923                                     I40IW_DEBUG_CM,
1924                                     "%s: listener (%p) pending accepts=%u\n",
1925                                     __func__,
1926                                     listener,
1927                                     atomic_read(&listener->pend_accepts_cnt));
1928         }
1929
1930         return ret;
1931 }
1932
1933 /**
1934  * i40iw_cm_del_listen - delete a linstener
1935  * @cm_core: cm's core
1936   * @listener: passive connection's listener
1937  * @apbvt_del: flag to delete apbvt
1938  */
1939 static int i40iw_cm_del_listen(struct i40iw_cm_core *cm_core,
1940                                struct i40iw_cm_listener *listener,
1941                                bool apbvt_del)
1942 {
1943         listener->listener_state = I40IW_CM_LISTENER_PASSIVE_STATE;
1944         listener->cm_id = NULL; /* going to be destroyed pretty soon */
1945         return i40iw_dec_refcnt_listen(cm_core, listener, 1, apbvt_del);
1946 }
1947
1948 /**
1949  * i40iw_addr_resolve_neigh - resolve neighbor address
1950  * @iwdev: iwarp device structure
1951  * @src_ip: local ip address
1952  * @dst_ip: remote ip address
1953  * @arpindex: if there is an arp entry
1954  */
1955 static int i40iw_addr_resolve_neigh(struct i40iw_device *iwdev,
1956                                     u32 src_ip,
1957                                     u32 dst_ip,
1958                                     int arpindex)
1959 {
1960         struct rtable *rt;
1961         struct neighbour *neigh;
1962         int rc = arpindex;
1963         struct net_device *netdev = iwdev->netdev;
1964         __be32 dst_ipaddr = htonl(dst_ip);
1965         __be32 src_ipaddr = htonl(src_ip);
1966
1967         rt = ip_route_output(&init_net, dst_ipaddr, src_ipaddr, 0, 0);
1968         if (IS_ERR(rt)) {
1969                 i40iw_pr_err("ip_route_output\n");
1970                 return rc;
1971         }
1972
1973         if (netif_is_bond_slave(netdev))
1974                 netdev = netdev_master_upper_dev_get(netdev);
1975
1976         neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr);
1977
1978         rcu_read_lock();
1979         if (neigh) {
1980                 if (neigh->nud_state & NUD_VALID) {
1981                         if (arpindex >= 0) {
1982                                 if (ether_addr_equal(iwdev->arp_table[arpindex].mac_addr,
1983                                                      neigh->ha))
1984                                         /* Mac address same as arp table */
1985                                         goto resolve_neigh_exit;
1986                                 i40iw_manage_arp_cache(iwdev,
1987                                                        iwdev->arp_table[arpindex].mac_addr,
1988                                                        &dst_ip,
1989                                                        true,
1990                                                        I40IW_ARP_DELETE);
1991                         }
1992
1993                         i40iw_manage_arp_cache(iwdev, neigh->ha, &dst_ip, true, I40IW_ARP_ADD);
1994                         rc = i40iw_arp_table(iwdev, &dst_ip, true, NULL, I40IW_ARP_RESOLVE);
1995                 } else {
1996                         neigh_event_send(neigh, NULL);
1997                 }
1998         }
1999  resolve_neigh_exit:
2000
2001         rcu_read_unlock();
2002         if (neigh)
2003                 neigh_release(neigh);
2004
2005         ip_rt_put(rt);
2006         return rc;
2007 }
2008
2009 /**
2010  * i40iw_get_dst_ipv6
2011  */
2012 static struct dst_entry *i40iw_get_dst_ipv6(struct sockaddr_in6 *src_addr,
2013                                             struct sockaddr_in6 *dst_addr)
2014 {
2015         struct dst_entry *dst;
2016         struct flowi6 fl6;
2017
2018         memset(&fl6, 0, sizeof(fl6));
2019         fl6.daddr = dst_addr->sin6_addr;
2020         fl6.saddr = src_addr->sin6_addr;
2021         if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
2022                 fl6.flowi6_oif = dst_addr->sin6_scope_id;
2023
2024         dst = ip6_route_output(&init_net, NULL, &fl6);
2025         return dst;
2026 }
2027
2028 /**
2029  * i40iw_addr_resolve_neigh_ipv6 - resolve neighbor ipv6 address
2030  * @iwdev: iwarp device structure
2031  * @dst_ip: remote ip address
2032  * @arpindex: if there is an arp entry
2033  */
2034 static int i40iw_addr_resolve_neigh_ipv6(struct i40iw_device *iwdev,
2035                                          u32 *src,
2036                                          u32 *dest,
2037                                          int arpindex)
2038 {
2039         struct neighbour *neigh;
2040         int rc = arpindex;
2041         struct net_device *netdev = iwdev->netdev;
2042         struct dst_entry *dst;
2043         struct sockaddr_in6 dst_addr;
2044         struct sockaddr_in6 src_addr;
2045
2046         memset(&dst_addr, 0, sizeof(dst_addr));
2047         dst_addr.sin6_family = AF_INET6;
2048         i40iw_copy_ip_htonl(dst_addr.sin6_addr.in6_u.u6_addr32, dest);
2049         memset(&src_addr, 0, sizeof(src_addr));
2050         src_addr.sin6_family = AF_INET6;
2051         i40iw_copy_ip_htonl(src_addr.sin6_addr.in6_u.u6_addr32, src);
2052         dst = i40iw_get_dst_ipv6(&src_addr, &dst_addr);
2053         if (!dst || dst->error) {
2054                 if (dst) {
2055                         i40iw_pr_err("ip6_route_output returned dst->error = %d\n",
2056                                      dst->error);
2057                         dst_release(dst);
2058                 }
2059                 return rc;
2060         }
2061
2062         if (netif_is_bond_slave(netdev))
2063                 netdev = netdev_master_upper_dev_get(netdev);
2064
2065         neigh = dst_neigh_lookup(dst, &dst_addr);
2066
2067         rcu_read_lock();
2068         if (neigh) {
2069                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "dst_neigh_lookup MAC=%pM\n", neigh->ha);
2070                 if (neigh->nud_state & NUD_VALID) {
2071                         if (arpindex >= 0) {
2072                                 if (ether_addr_equal
2073                                     (iwdev->arp_table[arpindex].mac_addr,
2074                                      neigh->ha)) {
2075                                         /* Mac address same as in arp table */
2076                                         goto resolve_neigh_exit6;
2077                                 }
2078                                 i40iw_manage_arp_cache(iwdev,
2079                                                        iwdev->arp_table[arpindex].mac_addr,
2080                                                        dest,
2081                                                        false,
2082                                                        I40IW_ARP_DELETE);
2083                         }
2084                         i40iw_manage_arp_cache(iwdev,
2085                                                neigh->ha,
2086                                                dest,
2087                                                false,
2088                                                I40IW_ARP_ADD);
2089                         rc = i40iw_arp_table(iwdev,
2090                                              dest,
2091                                              false,
2092                                              NULL,
2093                                              I40IW_ARP_RESOLVE);
2094                 } else {
2095                         neigh_event_send(neigh, NULL);
2096                 }
2097         }
2098
2099  resolve_neigh_exit6:
2100         rcu_read_unlock();
2101         if (neigh)
2102                 neigh_release(neigh);
2103         dst_release(dst);
2104         return rc;
2105 }
2106
2107 /**
2108  * i40iw_ipv4_is_loopback - check if loopback
2109  * @loc_addr: local addr to compare
2110  * @rem_addr: remote address
2111  */
2112 static bool i40iw_ipv4_is_loopback(u32 loc_addr, u32 rem_addr)
2113 {
2114         return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr);
2115 }
2116
2117 /**
2118  * i40iw_ipv6_is_loopback - check if loopback
2119  * @loc_addr: local addr to compare
2120  * @rem_addr: remote address
2121  */
2122 static bool i40iw_ipv6_is_loopback(u32 *loc_addr, u32 *rem_addr)
2123 {
2124         struct in6_addr raddr6;
2125
2126         i40iw_copy_ip_htonl(raddr6.in6_u.u6_addr32, rem_addr);
2127         return !memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6);
2128 }
2129
2130 /**
2131  * i40iw_make_cm_node - create a new instance of a cm node
2132  * @cm_core: cm's core
2133  * @iwdev: iwarp device structure
2134  * @cm_info: quad info for connection
2135  * @listener: passive connection's listener
2136  */
2137 static struct i40iw_cm_node *i40iw_make_cm_node(
2138                                    struct i40iw_cm_core *cm_core,
2139                                    struct i40iw_device *iwdev,
2140                                    struct i40iw_cm_info *cm_info,
2141                                    struct i40iw_cm_listener *listener)
2142 {
2143         struct i40iw_cm_node *cm_node;
2144         struct timespec ts;
2145         int oldarpindex;
2146         int arpindex;
2147         struct net_device *netdev = iwdev->netdev;
2148
2149         /* create an hte and cm_node for this instance */
2150         cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
2151         if (!cm_node)
2152                 return NULL;
2153
2154         /* set our node specific transport info */
2155         cm_node->ipv4 = cm_info->ipv4;
2156         cm_node->vlan_id = cm_info->vlan_id;
2157         if ((cm_node->vlan_id == I40IW_NO_VLAN) && iwdev->dcb)
2158                 cm_node->vlan_id = 0;
2159         cm_node->tos = cm_info->tos;
2160         cm_node->user_pri = cm_info->user_pri;
2161         if (listener) {
2162                 if (listener->tos != cm_info->tos)
2163                         i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB,
2164                                     "application TOS[%d] and remote client TOS[%d] mismatch\n",
2165                                      listener->tos, cm_info->tos);
2166                 cm_node->tos = max(listener->tos, cm_info->tos);
2167                 cm_node->user_pri = rt_tos2priority(cm_node->tos);
2168                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB, "listener: TOS:[%d] UP:[%d]\n",
2169                             cm_node->tos, cm_node->user_pri);
2170         }
2171         memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr));
2172         memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr));
2173         cm_node->loc_port = cm_info->loc_port;
2174         cm_node->rem_port = cm_info->rem_port;
2175
2176         cm_node->mpa_frame_rev = iwdev->mpa_version;
2177         cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
2178         cm_node->ird_size = I40IW_MAX_IRD_SIZE;
2179         cm_node->ord_size = I40IW_MAX_ORD_SIZE;
2180
2181         cm_node->listener = listener;
2182         cm_node->cm_id = cm_info->cm_id;
2183         ether_addr_copy(cm_node->loc_mac, netdev->dev_addr);
2184         spin_lock_init(&cm_node->retrans_list_lock);
2185
2186         atomic_set(&cm_node->ref_count, 1);
2187         /* associate our parent CM core */
2188         cm_node->cm_core = cm_core;
2189         cm_node->tcp_cntxt.loc_id = I40IW_CM_DEF_LOCAL_ID;
2190         cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE;
2191         cm_node->tcp_cntxt.rcv_wnd =
2192                         I40IW_CM_DEFAULT_RCV_WND_SCALED >> I40IW_CM_DEFAULT_RCV_WND_SCALE;
2193         ts = current_kernel_time();
2194         cm_node->tcp_cntxt.loc_seq_num = ts.tv_nsec;
2195         cm_node->tcp_cntxt.mss = iwdev->vsi.mss;
2196
2197         cm_node->iwdev = iwdev;
2198         cm_node->dev = &iwdev->sc_dev;
2199
2200         if ((cm_node->ipv4 &&
2201              i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
2202              (!cm_node->ipv4 && i40iw_ipv6_is_loopback(cm_node->loc_addr,
2203                                                        cm_node->rem_addr))) {
2204                 arpindex = i40iw_arp_table(iwdev,
2205                                            cm_node->rem_addr,
2206                                            false,
2207                                            NULL,
2208                                            I40IW_ARP_RESOLVE);
2209         } else {
2210                 oldarpindex = i40iw_arp_table(iwdev,
2211                                               cm_node->rem_addr,
2212                                               false,
2213                                               NULL,
2214                                               I40IW_ARP_RESOLVE);
2215                 if (cm_node->ipv4)
2216                         arpindex = i40iw_addr_resolve_neigh(iwdev,
2217                                                             cm_info->loc_addr[0],
2218                                                             cm_info->rem_addr[0],
2219                                                             oldarpindex);
2220                 else if (IS_ENABLED(CONFIG_IPV6))
2221                         arpindex = i40iw_addr_resolve_neigh_ipv6(iwdev,
2222                                                                  cm_info->loc_addr,
2223                                                                  cm_info->rem_addr,
2224                                                                  oldarpindex);
2225                 else
2226                         arpindex = -EINVAL;
2227         }
2228         if (arpindex < 0) {
2229                 i40iw_pr_err("cm_node arpindex\n");
2230                 kfree(cm_node);
2231                 return NULL;
2232         }
2233         ether_addr_copy(cm_node->rem_mac, iwdev->arp_table[arpindex].mac_addr);
2234         i40iw_add_hte_node(cm_core, cm_node);
2235         cm_core->stats_nodes_created++;
2236         return cm_node;
2237 }
2238
2239 /**
2240  * i40iw_rem_ref_cm_node - destroy an instance of a cm node
2241  * @cm_node: connection's node
2242  */
2243 static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *cm_node)
2244 {
2245         struct i40iw_cm_core *cm_core = cm_node->cm_core;
2246         struct i40iw_qp *iwqp;
2247         struct i40iw_cm_info nfo;
2248         unsigned long flags;
2249
2250         spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
2251         if (atomic_dec_return(&cm_node->ref_count)) {
2252                 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
2253                 return;
2254         }
2255         list_del(&cm_node->list);
2256         spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
2257
2258         /* if the node is destroyed before connection was accelerated */
2259         if (!cm_node->accelerated && cm_node->accept_pend) {
2260                 pr_err("node destroyed before established\n");
2261                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
2262         }
2263         if (cm_node->close_entry)
2264                 i40iw_handle_close_entry(cm_node, 0);
2265         if (cm_node->listener) {
2266                 i40iw_dec_refcnt_listen(cm_core, cm_node->listener, 0, true);
2267         } else {
2268                 if (!i40iw_port_in_use(cm_core, cm_node->loc_port, true) && cm_node->apbvt_set) {
2269                         i40iw_manage_apbvt(cm_node->iwdev,
2270                                            cm_node->loc_port,
2271                                            I40IW_MANAGE_APBVT_DEL);
2272                         cm_node->apbvt_set = 0;
2273                 }
2274                 i40iw_get_addr_info(cm_node, &nfo);
2275                 if (cm_node->qhash_set) {
2276                         i40iw_manage_qhash(cm_node->iwdev,
2277                                            &nfo,
2278                                            I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2279                                            I40IW_QHASH_MANAGE_TYPE_DELETE,
2280                                            NULL,
2281                                            false);
2282                         cm_node->qhash_set = 0;
2283                 }
2284         }
2285
2286         iwqp = cm_node->iwqp;
2287         if (iwqp) {
2288                 iwqp->cm_node = NULL;
2289                 i40iw_rem_ref(&iwqp->ibqp);
2290                 cm_node->iwqp = NULL;
2291         } else if (cm_node->qhash_set) {
2292                 i40iw_get_addr_info(cm_node, &nfo);
2293                 i40iw_manage_qhash(cm_node->iwdev,
2294                                    &nfo,
2295                                    I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2296                                    I40IW_QHASH_MANAGE_TYPE_DELETE,
2297                                    NULL,
2298                                    false);
2299                 cm_node->qhash_set = 0;
2300         }
2301
2302         cm_node->cm_core->stats_nodes_destroyed++;
2303         kfree(cm_node);
2304 }
2305
2306 /**
2307  * i40iw_handle_fin_pkt - FIN packet received
2308  * @cm_node: connection's node
2309  */
2310 static void i40iw_handle_fin_pkt(struct i40iw_cm_node *cm_node)
2311 {
2312         u32 ret;
2313
2314         switch (cm_node->state) {
2315         case I40IW_CM_STATE_SYN_RCVD:
2316         case I40IW_CM_STATE_SYN_SENT:
2317         case I40IW_CM_STATE_ESTABLISHED:
2318         case I40IW_CM_STATE_MPAREJ_RCVD:
2319                 cm_node->tcp_cntxt.rcv_nxt++;
2320                 i40iw_cleanup_retrans_entry(cm_node);
2321                 cm_node->state = I40IW_CM_STATE_LAST_ACK;
2322                 i40iw_send_fin(cm_node);
2323                 break;
2324         case I40IW_CM_STATE_MPAREQ_SENT:
2325                 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
2326                 cm_node->tcp_cntxt.rcv_nxt++;
2327                 i40iw_cleanup_retrans_entry(cm_node);
2328                 cm_node->state = I40IW_CM_STATE_CLOSED;
2329                 atomic_inc(&cm_node->ref_count);
2330                 i40iw_send_reset(cm_node);
2331                 break;
2332         case I40IW_CM_STATE_FIN_WAIT1:
2333                 cm_node->tcp_cntxt.rcv_nxt++;
2334                 i40iw_cleanup_retrans_entry(cm_node);
2335                 cm_node->state = I40IW_CM_STATE_CLOSING;
2336                 i40iw_send_ack(cm_node);
2337                 /*
2338                  * Wait for ACK as this is simultaneous close.
2339                  * After we receive ACK, do not send anything.
2340                  * Just rm the node.
2341                  */
2342                 break;
2343         case I40IW_CM_STATE_FIN_WAIT2:
2344                 cm_node->tcp_cntxt.rcv_nxt++;
2345                 i40iw_cleanup_retrans_entry(cm_node);
2346                 cm_node->state = I40IW_CM_STATE_TIME_WAIT;
2347                 i40iw_send_ack(cm_node);
2348                 ret =
2349                     i40iw_schedule_cm_timer(cm_node, NULL, I40IW_TIMER_TYPE_CLOSE, 1, 0);
2350                 if (ret)
2351                         i40iw_pr_err("node %p state = %d\n", cm_node, cm_node->state);
2352                 break;
2353         case I40IW_CM_STATE_TIME_WAIT:
2354                 cm_node->tcp_cntxt.rcv_nxt++;
2355                 i40iw_cleanup_retrans_entry(cm_node);
2356                 cm_node->state = I40IW_CM_STATE_CLOSED;
2357                 i40iw_rem_ref_cm_node(cm_node);
2358                 break;
2359         case I40IW_CM_STATE_OFFLOADED:
2360         default:
2361                 i40iw_pr_err("bad state node %p state = %d\n", cm_node, cm_node->state);
2362                 break;
2363         }
2364 }
2365
2366 /**
2367  * i40iw_handle_rst_pkt - process received RST packet
2368  * @cm_node: connection's node
2369  * @rbuf: receive buffer
2370  */
2371 static void i40iw_handle_rst_pkt(struct i40iw_cm_node *cm_node,
2372                                  struct i40iw_puda_buf *rbuf)
2373 {
2374         i40iw_cleanup_retrans_entry(cm_node);
2375         switch (cm_node->state) {
2376         case I40IW_CM_STATE_SYN_SENT:
2377         case I40IW_CM_STATE_MPAREQ_SENT:
2378                 switch (cm_node->mpa_frame_rev) {
2379                 case IETF_MPA_V2:
2380                         cm_node->mpa_frame_rev = IETF_MPA_V1;
2381                         /* send a syn and goto syn sent state */
2382                         cm_node->state = I40IW_CM_STATE_SYN_SENT;
2383                         if (i40iw_send_syn(cm_node, 0))
2384                                 i40iw_active_open_err(cm_node, false);
2385                         break;
2386                 case IETF_MPA_V1:
2387                 default:
2388                         i40iw_active_open_err(cm_node, false);
2389                         break;
2390                 }
2391                 break;
2392         case I40IW_CM_STATE_MPAREQ_RCVD:
2393                 atomic_add_return(1, &cm_node->passive_state);
2394                 break;
2395         case I40IW_CM_STATE_ESTABLISHED:
2396         case I40IW_CM_STATE_SYN_RCVD:
2397         case I40IW_CM_STATE_LISTENING:
2398                 i40iw_pr_err("Bad state state = %d\n", cm_node->state);
2399                 i40iw_passive_open_err(cm_node, false);
2400                 break;
2401         case I40IW_CM_STATE_OFFLOADED:
2402                 i40iw_active_open_err(cm_node, false);
2403                 break;
2404         case I40IW_CM_STATE_CLOSED:
2405                 break;
2406         case I40IW_CM_STATE_FIN_WAIT2:
2407         case I40IW_CM_STATE_FIN_WAIT1:
2408         case I40IW_CM_STATE_LAST_ACK:
2409                 cm_node->cm_id->rem_ref(cm_node->cm_id);
2410         case I40IW_CM_STATE_TIME_WAIT:
2411                 cm_node->state = I40IW_CM_STATE_CLOSED;
2412                 i40iw_rem_ref_cm_node(cm_node);
2413                 break;
2414         default:
2415                 break;
2416         }
2417 }
2418
2419 /**
2420  * i40iw_handle_rcv_mpa - Process a recv'd mpa buffer
2421  * @cm_node: connection's node
2422  * @rbuf: receive buffer
2423  */
2424 static void i40iw_handle_rcv_mpa(struct i40iw_cm_node *cm_node,
2425                                  struct i40iw_puda_buf *rbuf)
2426 {
2427         int ret;
2428         int datasize = rbuf->datalen;
2429         u8 *dataloc = rbuf->data;
2430
2431         enum i40iw_cm_event_type type = I40IW_CM_EVENT_UNKNOWN;
2432         u32 res_type;
2433
2434         ret = i40iw_parse_mpa(cm_node, dataloc, &res_type, datasize);
2435         if (ret) {
2436                 if (cm_node->state == I40IW_CM_STATE_MPAREQ_SENT)
2437                         i40iw_active_open_err(cm_node, true);
2438                 else
2439                         i40iw_passive_open_err(cm_node, true);
2440                 return;
2441         }
2442
2443         switch (cm_node->state) {
2444         case I40IW_CM_STATE_ESTABLISHED:
2445                 if (res_type == I40IW_MPA_REQUEST_REJECT)
2446                         i40iw_pr_err("state for reject\n");
2447                 cm_node->state = I40IW_CM_STATE_MPAREQ_RCVD;
2448                 type = I40IW_CM_EVENT_MPA_REQ;
2449                 i40iw_send_ack(cm_node);        /* ACK received MPA request */
2450                 atomic_set(&cm_node->passive_state,
2451                            I40IW_PASSIVE_STATE_INDICATED);
2452                 break;
2453         case I40IW_CM_STATE_MPAREQ_SENT:
2454                 i40iw_cleanup_retrans_entry(cm_node);
2455                 if (res_type == I40IW_MPA_REQUEST_REJECT) {
2456                         type = I40IW_CM_EVENT_MPA_REJECT;
2457                         cm_node->state = I40IW_CM_STATE_MPAREJ_RCVD;
2458                 } else {
2459                         type = I40IW_CM_EVENT_CONNECTED;
2460                         cm_node->state = I40IW_CM_STATE_OFFLOADED;
2461                 }
2462                 i40iw_send_ack(cm_node);
2463                 break;
2464         default:
2465                 pr_err("%s wrong cm_node state =%d\n", __func__, cm_node->state);
2466                 break;
2467         }
2468         i40iw_create_event(cm_node, type);
2469 }
2470
2471 /**
2472  * i40iw_indicate_pkt_err - Send up err event to cm
2473  * @cm_node: connection's node
2474  */
2475 static void i40iw_indicate_pkt_err(struct i40iw_cm_node *cm_node)
2476 {
2477         switch (cm_node->state) {
2478         case I40IW_CM_STATE_SYN_SENT:
2479         case I40IW_CM_STATE_MPAREQ_SENT:
2480                 i40iw_active_open_err(cm_node, true);
2481                 break;
2482         case I40IW_CM_STATE_ESTABLISHED:
2483         case I40IW_CM_STATE_SYN_RCVD:
2484                 i40iw_passive_open_err(cm_node, true);
2485                 break;
2486         case I40IW_CM_STATE_OFFLOADED:
2487         default:
2488                 break;
2489         }
2490 }
2491
2492 /**
2493  * i40iw_check_syn - Check for error on received syn ack
2494  * @cm_node: connection's node
2495  * @tcph: pointer tcp header
2496  */
2497 static int i40iw_check_syn(struct i40iw_cm_node *cm_node, struct tcphdr *tcph)
2498 {
2499         int err = 0;
2500
2501         if (ntohl(tcph->ack_seq) != cm_node->tcp_cntxt.loc_seq_num) {
2502                 err = 1;
2503                 i40iw_active_open_err(cm_node, true);
2504         }
2505         return err;
2506 }
2507
2508 /**
2509  * i40iw_check_seq - check seq numbers if OK
2510  * @cm_node: connection's node
2511  * @tcph: pointer tcp header
2512  */
2513 static int i40iw_check_seq(struct i40iw_cm_node *cm_node, struct tcphdr *tcph)
2514 {
2515         int err = 0;
2516         u32 seq;
2517         u32 ack_seq;
2518         u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
2519         u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
2520         u32 rcv_wnd;
2521
2522         seq = ntohl(tcph->seq);
2523         ack_seq = ntohl(tcph->ack_seq);
2524         rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
2525         if (ack_seq != loc_seq_num)
2526                 err = -1;
2527         else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
2528                 err = -1;
2529         if (err) {
2530                 i40iw_pr_err("seq number\n");
2531                 i40iw_indicate_pkt_err(cm_node);
2532         }
2533         return err;
2534 }
2535
2536 /**
2537  * i40iw_handle_syn_pkt - is for Passive node
2538  * @cm_node: connection's node
2539  * @rbuf: receive buffer
2540  */
2541 static void i40iw_handle_syn_pkt(struct i40iw_cm_node *cm_node,
2542                                  struct i40iw_puda_buf *rbuf)
2543 {
2544         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2545         int ret;
2546         u32 inc_sequence;
2547         int optionsize;
2548         struct i40iw_cm_info nfo;
2549
2550         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2551         inc_sequence = ntohl(tcph->seq);
2552
2553         switch (cm_node->state) {
2554         case I40IW_CM_STATE_SYN_SENT:
2555         case I40IW_CM_STATE_MPAREQ_SENT:
2556                 /* Rcvd syn on active open connection */
2557                 i40iw_active_open_err(cm_node, 1);
2558                 break;
2559         case I40IW_CM_STATE_LISTENING:
2560                 /* Passive OPEN */
2561                 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
2562                     cm_node->listener->backlog) {
2563                         cm_node->cm_core->stats_backlog_drops++;
2564                         i40iw_passive_open_err(cm_node, false);
2565                         break;
2566                 }
2567                 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1);
2568                 if (ret) {
2569                         i40iw_passive_open_err(cm_node, false);
2570                         /* drop pkt */
2571                         break;
2572                 }
2573                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2574                 cm_node->accept_pend = 1;
2575                 atomic_inc(&cm_node->listener->pend_accepts_cnt);
2576
2577                 cm_node->state = I40IW_CM_STATE_SYN_RCVD;
2578                 i40iw_get_addr_info(cm_node, &nfo);
2579                 ret = i40iw_manage_qhash(cm_node->iwdev,
2580                                          &nfo,
2581                                          I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2582                                          I40IW_QHASH_MANAGE_TYPE_ADD,
2583                                          (void *)cm_node,
2584                                          false);
2585                 cm_node->qhash_set = true;
2586                 break;
2587         case I40IW_CM_STATE_CLOSED:
2588                 i40iw_cleanup_retrans_entry(cm_node);
2589                 atomic_inc(&cm_node->ref_count);
2590                 i40iw_send_reset(cm_node);
2591                 break;
2592         case I40IW_CM_STATE_OFFLOADED:
2593         case I40IW_CM_STATE_ESTABLISHED:
2594         case I40IW_CM_STATE_FIN_WAIT1:
2595         case I40IW_CM_STATE_FIN_WAIT2:
2596         case I40IW_CM_STATE_MPAREQ_RCVD:
2597         case I40IW_CM_STATE_LAST_ACK:
2598         case I40IW_CM_STATE_CLOSING:
2599         case I40IW_CM_STATE_UNKNOWN:
2600         default:
2601                 break;
2602         }
2603 }
2604
2605 /**
2606  * i40iw_handle_synack_pkt - Process SYN+ACK packet (active side)
2607  * @cm_node: connection's node
2608  * @rbuf: receive buffer
2609  */
2610 static void i40iw_handle_synack_pkt(struct i40iw_cm_node *cm_node,
2611                                     struct i40iw_puda_buf *rbuf)
2612 {
2613         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2614         int ret;
2615         u32 inc_sequence;
2616         int optionsize;
2617
2618         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2619         inc_sequence = ntohl(tcph->seq);
2620         switch (cm_node->state) {
2621         case I40IW_CM_STATE_SYN_SENT:
2622                 i40iw_cleanup_retrans_entry(cm_node);
2623                 /* active open */
2624                 if (i40iw_check_syn(cm_node, tcph)) {
2625                         i40iw_pr_err("check syn fail\n");
2626                         return;
2627                 }
2628                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2629                 /* setup options */
2630                 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 0);
2631                 if (ret) {
2632                         i40iw_debug(cm_node->dev,
2633                                     I40IW_DEBUG_CM,
2634                                     "cm_node=%p tcp_options failed\n",
2635                                     cm_node);
2636                         break;
2637                 }
2638                 i40iw_cleanup_retrans_entry(cm_node);
2639                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2640                 i40iw_send_ack(cm_node);        /* ACK  for the syn_ack */
2641                 ret = i40iw_send_mpa_request(cm_node);
2642                 if (ret) {
2643                         i40iw_debug(cm_node->dev,
2644                                     I40IW_DEBUG_CM,
2645                                     "cm_node=%p i40iw_send_mpa_request failed\n",
2646                                     cm_node);
2647                         break;
2648                 }
2649                 cm_node->state = I40IW_CM_STATE_MPAREQ_SENT;
2650                 break;
2651         case I40IW_CM_STATE_MPAREQ_RCVD:
2652                 i40iw_passive_open_err(cm_node, true);
2653                 break;
2654         case I40IW_CM_STATE_LISTENING:
2655                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2656                 i40iw_cleanup_retrans_entry(cm_node);
2657                 cm_node->state = I40IW_CM_STATE_CLOSED;
2658                 i40iw_send_reset(cm_node);
2659                 break;
2660         case I40IW_CM_STATE_CLOSED:
2661                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2662                 i40iw_cleanup_retrans_entry(cm_node);
2663                 atomic_inc(&cm_node->ref_count);
2664                 i40iw_send_reset(cm_node);
2665                 break;
2666         case I40IW_CM_STATE_ESTABLISHED:
2667         case I40IW_CM_STATE_FIN_WAIT1:
2668         case I40IW_CM_STATE_FIN_WAIT2:
2669         case I40IW_CM_STATE_LAST_ACK:
2670         case I40IW_CM_STATE_OFFLOADED:
2671         case I40IW_CM_STATE_CLOSING:
2672         case I40IW_CM_STATE_UNKNOWN:
2673         case I40IW_CM_STATE_MPAREQ_SENT:
2674         default:
2675                 break;
2676         }
2677 }
2678
2679 /**
2680  * i40iw_handle_ack_pkt - process packet with ACK
2681  * @cm_node: connection's node
2682  * @rbuf: receive buffer
2683  */
2684 static int i40iw_handle_ack_pkt(struct i40iw_cm_node *cm_node,
2685                                 struct i40iw_puda_buf *rbuf)
2686 {
2687         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2688         u32 inc_sequence;
2689         int ret = 0;
2690         int optionsize;
2691         u32 datasize = rbuf->datalen;
2692
2693         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2694
2695         if (i40iw_check_seq(cm_node, tcph))
2696                 return -EINVAL;
2697
2698         inc_sequence = ntohl(tcph->seq);
2699         switch (cm_node->state) {
2700         case I40IW_CM_STATE_SYN_RCVD:
2701                 i40iw_cleanup_retrans_entry(cm_node);
2702                 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1);
2703                 if (ret)
2704                         break;
2705                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2706                 cm_node->state = I40IW_CM_STATE_ESTABLISHED;
2707                 if (datasize) {
2708                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2709                         i40iw_handle_rcv_mpa(cm_node, rbuf);
2710                 }
2711                 break;
2712         case I40IW_CM_STATE_ESTABLISHED:
2713                 i40iw_cleanup_retrans_entry(cm_node);
2714                 if (datasize) {
2715                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2716                         i40iw_handle_rcv_mpa(cm_node, rbuf);
2717                 }
2718                 break;
2719         case I40IW_CM_STATE_MPAREQ_SENT:
2720                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2721                 if (datasize) {
2722                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2723                         i40iw_handle_rcv_mpa(cm_node, rbuf);
2724                 }
2725                 break;
2726         case I40IW_CM_STATE_LISTENING:
2727                 i40iw_cleanup_retrans_entry(cm_node);
2728                 cm_node->state = I40IW_CM_STATE_CLOSED;
2729                 i40iw_send_reset(cm_node);
2730                 break;
2731         case I40IW_CM_STATE_CLOSED:
2732                 i40iw_cleanup_retrans_entry(cm_node);
2733                 atomic_inc(&cm_node->ref_count);
2734                 i40iw_send_reset(cm_node);
2735                 break;
2736         case I40IW_CM_STATE_LAST_ACK:
2737         case I40IW_CM_STATE_CLOSING:
2738                 i40iw_cleanup_retrans_entry(cm_node);
2739                 cm_node->state = I40IW_CM_STATE_CLOSED;
2740                 if (!cm_node->accept_pend)
2741                         cm_node->cm_id->rem_ref(cm_node->cm_id);
2742                 i40iw_rem_ref_cm_node(cm_node);
2743                 break;
2744         case I40IW_CM_STATE_FIN_WAIT1:
2745                 i40iw_cleanup_retrans_entry(cm_node);
2746                 cm_node->state = I40IW_CM_STATE_FIN_WAIT2;
2747                 break;
2748         case I40IW_CM_STATE_SYN_SENT:
2749         case I40IW_CM_STATE_FIN_WAIT2:
2750         case I40IW_CM_STATE_OFFLOADED:
2751         case I40IW_CM_STATE_MPAREQ_RCVD:
2752         case I40IW_CM_STATE_UNKNOWN:
2753         default:
2754                 i40iw_cleanup_retrans_entry(cm_node);
2755                 break;
2756         }
2757         return ret;
2758 }
2759
2760 /**
2761  * i40iw_process_packet - process cm packet
2762  * @cm_node: connection's node
2763  * @rbuf: receive buffer
2764  */
2765 static void i40iw_process_packet(struct i40iw_cm_node *cm_node,
2766                                  struct i40iw_puda_buf *rbuf)
2767 {
2768         enum i40iw_tcpip_pkt_type pkt_type = I40IW_PKT_TYPE_UNKNOWN;
2769         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2770         u32 fin_set = 0;
2771         int ret;
2772
2773         if (tcph->rst) {
2774                 pkt_type = I40IW_PKT_TYPE_RST;
2775         } else if (tcph->syn) {
2776                 pkt_type = I40IW_PKT_TYPE_SYN;
2777                 if (tcph->ack)
2778                         pkt_type = I40IW_PKT_TYPE_SYNACK;
2779         } else if (tcph->ack) {
2780                 pkt_type = I40IW_PKT_TYPE_ACK;
2781         }
2782         if (tcph->fin)
2783                 fin_set = 1;
2784
2785         switch (pkt_type) {
2786         case I40IW_PKT_TYPE_SYN:
2787                 i40iw_handle_syn_pkt(cm_node, rbuf);
2788                 break;
2789         case I40IW_PKT_TYPE_SYNACK:
2790                 i40iw_handle_synack_pkt(cm_node, rbuf);
2791                 break;
2792         case I40IW_PKT_TYPE_ACK:
2793                 ret = i40iw_handle_ack_pkt(cm_node, rbuf);
2794                 if (fin_set && !ret)
2795                         i40iw_handle_fin_pkt(cm_node);
2796                 break;
2797         case I40IW_PKT_TYPE_RST:
2798                 i40iw_handle_rst_pkt(cm_node, rbuf);
2799                 break;
2800         default:
2801                 if (fin_set &&
2802                     (!i40iw_check_seq(cm_node, (struct tcphdr *)rbuf->tcph)))
2803                         i40iw_handle_fin_pkt(cm_node);
2804                 break;
2805         }
2806 }
2807
2808 /**
2809  * i40iw_make_listen_node - create a listen node with params
2810  * @cm_core: cm's core
2811  * @iwdev: iwarp device structure
2812  * @cm_info: quad info for connection
2813  */
2814 static struct i40iw_cm_listener *i40iw_make_listen_node(
2815                                         struct i40iw_cm_core *cm_core,
2816                                         struct i40iw_device *iwdev,
2817                                         struct i40iw_cm_info *cm_info)
2818 {
2819         struct i40iw_cm_listener *listener;
2820         unsigned long flags;
2821
2822         /* cannot have multiple matching listeners */
2823         listener = i40iw_find_listener(cm_core, cm_info->loc_addr,
2824                                        cm_info->loc_port,
2825                                        cm_info->vlan_id,
2826                                        I40IW_CM_LISTENER_EITHER_STATE);
2827         if (listener &&
2828             (listener->listener_state == I40IW_CM_LISTENER_ACTIVE_STATE)) {
2829                 atomic_dec(&listener->ref_count);
2830                 i40iw_debug(cm_core->dev,
2831                             I40IW_DEBUG_CM,
2832                             "Not creating listener since it already exists\n");
2833                 return NULL;
2834         }
2835
2836         if (!listener) {
2837                 /* create a CM listen node (1/2 node to compare incoming traffic to) */
2838                 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
2839                 if (!listener)
2840                         return NULL;
2841                 cm_core->stats_listen_nodes_created++;
2842                 memcpy(listener->loc_addr, cm_info->loc_addr, sizeof(listener->loc_addr));
2843                 listener->loc_port = cm_info->loc_port;
2844
2845                 INIT_LIST_HEAD(&listener->child_listen_list);
2846
2847                 atomic_set(&listener->ref_count, 1);
2848         } else {
2849                 listener->reused_node = 1;
2850         }
2851
2852         listener->cm_id = cm_info->cm_id;
2853         listener->ipv4 = cm_info->ipv4;
2854         listener->vlan_id = cm_info->vlan_id;
2855         atomic_set(&listener->pend_accepts_cnt, 0);
2856         listener->cm_core = cm_core;
2857         listener->iwdev = iwdev;
2858
2859         listener->backlog = cm_info->backlog;
2860         listener->listener_state = I40IW_CM_LISTENER_ACTIVE_STATE;
2861
2862         if (!listener->reused_node) {
2863                 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2864                 list_add(&listener->list, &cm_core->listen_nodes);
2865                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2866         }
2867
2868         return listener;
2869 }
2870
2871 /**
2872  * i40iw_create_cm_node - make a connection node with params
2873  * @cm_core: cm's core
2874  * @iwdev: iwarp device structure
2875  * @private_data_len: len to provate data for mpa request
2876  * @private_data: pointer to private data for connection
2877  * @cm_info: quad info for connection
2878  */
2879 static struct i40iw_cm_node *i40iw_create_cm_node(
2880                                         struct i40iw_cm_core *cm_core,
2881                                         struct i40iw_device *iwdev,
2882                                         u16 private_data_len,
2883                                         void *private_data,
2884                                         struct i40iw_cm_info *cm_info)
2885 {
2886         struct i40iw_cm_node *cm_node;
2887         struct i40iw_cm_listener *loopback_remotelistener;
2888         struct i40iw_cm_node *loopback_remotenode;
2889         struct i40iw_cm_info loopback_cm_info;
2890
2891         /* create a CM connection node */
2892         cm_node = i40iw_make_cm_node(cm_core, iwdev, cm_info, NULL);
2893         if (!cm_node)
2894                 return ERR_PTR(-ENOMEM);
2895         /* set our node side to client (active) side */
2896         cm_node->tcp_cntxt.client = 1;
2897         cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE;
2898
2899         if (!memcmp(cm_info->loc_addr, cm_info->rem_addr, sizeof(cm_info->loc_addr))) {
2900                 loopback_remotelistener = i40iw_find_listener(
2901                                                 cm_core,
2902                                                 cm_info->rem_addr,
2903                                                 cm_node->rem_port,
2904                                                 cm_node->vlan_id,
2905                                                 I40IW_CM_LISTENER_ACTIVE_STATE);
2906                 if (!loopback_remotelistener) {
2907                         i40iw_rem_ref_cm_node(cm_node);
2908                         return ERR_PTR(-ECONNREFUSED);
2909                 } else {
2910                         loopback_cm_info = *cm_info;
2911                         loopback_cm_info.loc_port = cm_info->rem_port;
2912                         loopback_cm_info.rem_port = cm_info->loc_port;
2913                         loopback_cm_info.cm_id = loopback_remotelistener->cm_id;
2914                         loopback_cm_info.ipv4 = cm_info->ipv4;
2915                         loopback_remotenode = i40iw_make_cm_node(cm_core,
2916                                                                  iwdev,
2917                                                                  &loopback_cm_info,
2918                                                                  loopback_remotelistener);
2919                         if (!loopback_remotenode) {
2920                                 i40iw_rem_ref_cm_node(cm_node);
2921                                 return ERR_PTR(-ENOMEM);
2922                         }
2923                         cm_core->stats_loopbacks++;
2924                         loopback_remotenode->loopbackpartner = cm_node;
2925                         loopback_remotenode->tcp_cntxt.rcv_wscale =
2926                                 I40IW_CM_DEFAULT_RCV_WND_SCALE;
2927                         cm_node->loopbackpartner = loopback_remotenode;
2928                         memcpy(loopback_remotenode->pdata_buf, private_data,
2929                                private_data_len);
2930                         loopback_remotenode->pdata.size = private_data_len;
2931
2932                         cm_node->state = I40IW_CM_STATE_OFFLOADED;
2933                         cm_node->tcp_cntxt.rcv_nxt =
2934                                 loopback_remotenode->tcp_cntxt.loc_seq_num;
2935                         loopback_remotenode->tcp_cntxt.rcv_nxt =
2936                                 cm_node->tcp_cntxt.loc_seq_num;
2937                         cm_node->tcp_cntxt.max_snd_wnd =
2938                                 loopback_remotenode->tcp_cntxt.rcv_wnd;
2939                         loopback_remotenode->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
2940                         cm_node->tcp_cntxt.snd_wnd = loopback_remotenode->tcp_cntxt.rcv_wnd;
2941                         loopback_remotenode->tcp_cntxt.snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
2942                         cm_node->tcp_cntxt.snd_wscale = loopback_remotenode->tcp_cntxt.rcv_wscale;
2943                         loopback_remotenode->tcp_cntxt.snd_wscale = cm_node->tcp_cntxt.rcv_wscale;
2944                         loopback_remotenode->state = I40IW_CM_STATE_MPAREQ_RCVD;
2945                         i40iw_create_event(loopback_remotenode, I40IW_CM_EVENT_MPA_REQ);
2946                 }
2947                 return cm_node;
2948         }
2949
2950         cm_node->pdata.size = private_data_len;
2951         cm_node->pdata.addr = cm_node->pdata_buf;
2952
2953         memcpy(cm_node->pdata_buf, private_data, private_data_len);
2954
2955         cm_node->state = I40IW_CM_STATE_SYN_SENT;
2956         return cm_node;
2957 }
2958
2959 /**
2960  * i40iw_cm_reject - reject and teardown a connection
2961  * @cm_node: connection's node
2962  * @pdate: ptr to private data for reject
2963  * @plen: size of private data
2964  */
2965 static int i40iw_cm_reject(struct i40iw_cm_node *cm_node, const void *pdata, u8 plen)
2966 {
2967         int ret = 0;
2968         int err;
2969         int passive_state;
2970         struct iw_cm_id *cm_id = cm_node->cm_id;
2971         struct i40iw_cm_node *loopback = cm_node->loopbackpartner;
2972
2973         if (cm_node->tcp_cntxt.client)
2974                 return ret;
2975         i40iw_cleanup_retrans_entry(cm_node);
2976
2977         if (!loopback) {
2978                 passive_state = atomic_add_return(1, &cm_node->passive_state);
2979                 if (passive_state == I40IW_SEND_RESET_EVENT) {
2980                         cm_node->state = I40IW_CM_STATE_CLOSED;
2981                         i40iw_rem_ref_cm_node(cm_node);
2982                 } else {
2983                         if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
2984                                 i40iw_rem_ref_cm_node(cm_node);
2985                         } else {
2986                                 ret = i40iw_send_mpa_reject(cm_node, pdata, plen);
2987                                 if (ret) {
2988                                         cm_node->state = I40IW_CM_STATE_CLOSED;
2989                                         err = i40iw_send_reset(cm_node);
2990                                         if (err)
2991                                                 i40iw_pr_err("send reset failed\n");
2992                                 } else {
2993                                         cm_id->add_ref(cm_id);
2994                                 }
2995                         }
2996                 }
2997         } else {
2998                 cm_node->cm_id = NULL;
2999                 if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
3000                         i40iw_rem_ref_cm_node(cm_node);
3001                         i40iw_rem_ref_cm_node(loopback);
3002                 } else {
3003                         ret = i40iw_send_cm_event(loopback,
3004                                                   loopback->cm_id,
3005                                                   IW_CM_EVENT_CONNECT_REPLY,
3006                                                   -ECONNREFUSED);
3007                         i40iw_rem_ref_cm_node(cm_node);
3008                         loopback->state = I40IW_CM_STATE_CLOSING;
3009
3010                         cm_id = loopback->cm_id;
3011                         i40iw_rem_ref_cm_node(loopback);
3012                         cm_id->rem_ref(cm_id);
3013                 }
3014         }
3015
3016         return ret;
3017 }
3018
3019 /**
3020  * i40iw_cm_close - close of cm connection
3021  * @cm_node: connection's node
3022  */
3023 static int i40iw_cm_close(struct i40iw_cm_node *cm_node)
3024 {
3025         int ret = 0;
3026
3027         if (!cm_node)
3028                 return -EINVAL;
3029
3030         switch (cm_node->state) {
3031         case I40IW_CM_STATE_SYN_RCVD:
3032         case I40IW_CM_STATE_SYN_SENT:
3033         case I40IW_CM_STATE_ONE_SIDE_ESTABLISHED:
3034         case I40IW_CM_STATE_ESTABLISHED:
3035         case I40IW_CM_STATE_ACCEPTING:
3036         case I40IW_CM_STATE_MPAREQ_SENT:
3037         case I40IW_CM_STATE_MPAREQ_RCVD:
3038                 i40iw_cleanup_retrans_entry(cm_node);
3039                 i40iw_send_reset(cm_node);
3040                 break;
3041         case I40IW_CM_STATE_CLOSE_WAIT:
3042                 cm_node->state = I40IW_CM_STATE_LAST_ACK;
3043                 i40iw_send_fin(cm_node);
3044                 break;
3045         case I40IW_CM_STATE_FIN_WAIT1:
3046         case I40IW_CM_STATE_FIN_WAIT2:
3047         case I40IW_CM_STATE_LAST_ACK:
3048         case I40IW_CM_STATE_TIME_WAIT:
3049         case I40IW_CM_STATE_CLOSING:
3050                 ret = -1;
3051                 break;
3052         case I40IW_CM_STATE_LISTENING:
3053                 i40iw_cleanup_retrans_entry(cm_node);
3054                 i40iw_send_reset(cm_node);
3055                 break;
3056         case I40IW_CM_STATE_MPAREJ_RCVD:
3057         case I40IW_CM_STATE_UNKNOWN:
3058         case I40IW_CM_STATE_INITED:
3059         case I40IW_CM_STATE_CLOSED:
3060         case I40IW_CM_STATE_LISTENER_DESTROYED:
3061                 i40iw_rem_ref_cm_node(cm_node);
3062                 break;
3063         case I40IW_CM_STATE_OFFLOADED:
3064                 if (cm_node->send_entry)
3065                         i40iw_pr_err("send_entry\n");
3066                 i40iw_rem_ref_cm_node(cm_node);
3067                 break;
3068         }
3069         return ret;
3070 }
3071
3072 /**
3073  * i40iw_receive_ilq - recv an ETHERNET packet, and process it
3074  * through CM
3075  * @vsi: pointer to the vsi structure
3076  * @rbuf: receive buffer
3077  */
3078 void i40iw_receive_ilq(struct i40iw_sc_vsi *vsi, struct i40iw_puda_buf *rbuf)
3079 {
3080         struct i40iw_cm_node *cm_node;
3081         struct i40iw_cm_listener *listener;
3082         struct iphdr *iph;
3083         struct ipv6hdr *ip6h;
3084         struct tcphdr *tcph;
3085         struct i40iw_cm_info cm_info;
3086         struct i40iw_sc_dev *dev = vsi->dev;
3087         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
3088         struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3089         struct vlan_ethhdr *ethh;
3090         u16 vtag;
3091
3092         /* if vlan, then maclen = 18 else 14 */
3093         iph = (struct iphdr *)rbuf->iph;
3094         memset(&cm_info, 0, sizeof(cm_info));
3095
3096         i40iw_debug_buf(dev,
3097                         I40IW_DEBUG_ILQ,
3098                         "RECEIVE ILQ BUFFER",
3099                         rbuf->mem.va,
3100                         rbuf->totallen);
3101         ethh = (struct vlan_ethhdr *)rbuf->mem.va;
3102
3103         if (ethh->h_vlan_proto == htons(ETH_P_8021Q)) {
3104                 vtag = ntohs(ethh->h_vlan_TCI);
3105                 cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
3106                 cm_info.vlan_id = vtag & VLAN_VID_MASK;
3107                 i40iw_debug(cm_core->dev,
3108                             I40IW_DEBUG_CM,
3109                             "%s vlan_id=%d\n",
3110                             __func__,
3111                             cm_info.vlan_id);
3112         } else {
3113                 cm_info.vlan_id = I40IW_NO_VLAN;
3114         }
3115         tcph = (struct tcphdr *)rbuf->tcph;
3116
3117         if (rbuf->ipv4) {
3118                 cm_info.loc_addr[0] = ntohl(iph->daddr);
3119                 cm_info.rem_addr[0] = ntohl(iph->saddr);
3120                 cm_info.ipv4 = true;
3121                 cm_info.tos = iph->tos;
3122         } else {
3123                 ip6h = (struct ipv6hdr *)rbuf->iph;
3124                 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3125                                     ip6h->daddr.in6_u.u6_addr32);
3126                 i40iw_copy_ip_ntohl(cm_info.rem_addr,
3127                                     ip6h->saddr.in6_u.u6_addr32);
3128                 cm_info.ipv4 = false;
3129                 cm_info.tos = (ip6h->priority << 4) | (ip6h->flow_lbl[0] >> 4);
3130         }
3131         cm_info.loc_port = ntohs(tcph->dest);
3132         cm_info.rem_port = ntohs(tcph->source);
3133         cm_node = i40iw_find_node(cm_core,
3134                                   cm_info.rem_port,
3135                                   cm_info.rem_addr,
3136                                   cm_info.loc_port,
3137                                   cm_info.loc_addr,
3138                                   true);
3139
3140         if (!cm_node) {
3141                 /* Only type of packet accepted are for */
3142                 /* the PASSIVE open (syn only) */
3143                 if (!tcph->syn || tcph->ack)
3144                         return;
3145                 listener =
3146                     i40iw_find_listener(cm_core,
3147                                         cm_info.loc_addr,
3148                                         cm_info.loc_port,
3149                                         cm_info.vlan_id,
3150                                         I40IW_CM_LISTENER_ACTIVE_STATE);
3151                 if (!listener) {
3152                         cm_info.cm_id = NULL;
3153                         i40iw_debug(cm_core->dev,
3154                                     I40IW_DEBUG_CM,
3155                                     "%s no listener found\n",
3156                                     __func__);
3157                         return;
3158                 }
3159                 cm_info.cm_id = listener->cm_id;
3160                 cm_node = i40iw_make_cm_node(cm_core, iwdev, &cm_info, listener);
3161                 if (!cm_node) {
3162                         i40iw_debug(cm_core->dev,
3163                                     I40IW_DEBUG_CM,
3164                                     "%s allocate node failed\n",
3165                                     __func__);
3166                         atomic_dec(&listener->ref_count);
3167                         return;
3168                 }
3169                 if (!tcph->rst && !tcph->fin) {
3170                         cm_node->state = I40IW_CM_STATE_LISTENING;
3171                 } else {
3172                         i40iw_rem_ref_cm_node(cm_node);
3173                         return;
3174                 }
3175                 atomic_inc(&cm_node->ref_count);
3176         } else if (cm_node->state == I40IW_CM_STATE_OFFLOADED) {
3177                 i40iw_rem_ref_cm_node(cm_node);
3178                 return;
3179         }
3180         i40iw_process_packet(cm_node, rbuf);
3181         i40iw_rem_ref_cm_node(cm_node);
3182 }
3183
3184 /**
3185  * i40iw_setup_cm_core - allocate a top level instance of a cm
3186  * core
3187  * @iwdev: iwarp device structure
3188  */
3189 void i40iw_setup_cm_core(struct i40iw_device *iwdev)
3190 {
3191         struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3192
3193         cm_core->iwdev = iwdev;
3194         cm_core->dev = &iwdev->sc_dev;
3195
3196         INIT_LIST_HEAD(&cm_core->connected_nodes);
3197         INIT_LIST_HEAD(&cm_core->listen_nodes);
3198
3199         setup_timer(&cm_core->tcp_timer, i40iw_cm_timer_tick,
3200                     (unsigned long)cm_core);
3201
3202         spin_lock_init(&cm_core->ht_lock);
3203         spin_lock_init(&cm_core->listen_list_lock);
3204
3205         cm_core->event_wq = alloc_ordered_workqueue("iwewq",
3206                                                     WQ_MEM_RECLAIM);
3207
3208         cm_core->disconn_wq = alloc_ordered_workqueue("iwdwq",
3209                                                       WQ_MEM_RECLAIM);
3210 }
3211
3212 /**
3213  * i40iw_cleanup_cm_core - deallocate a top level instance of a
3214  * cm core
3215  * @cm_core: cm's core
3216  */
3217 void i40iw_cleanup_cm_core(struct i40iw_cm_core *cm_core)
3218 {
3219         unsigned long flags;
3220
3221         if (!cm_core)
3222                 return;
3223
3224         spin_lock_irqsave(&cm_core->ht_lock, flags);
3225         if (timer_pending(&cm_core->tcp_timer))
3226                 del_timer_sync(&cm_core->tcp_timer);
3227         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
3228
3229         destroy_workqueue(cm_core->event_wq);
3230         destroy_workqueue(cm_core->disconn_wq);
3231 }
3232
3233 /**
3234  * i40iw_init_tcp_ctx - setup qp context
3235  * @cm_node: connection's node
3236  * @tcp_info: offload info for tcp
3237  * @iwqp: associate qp for the connection
3238  */
3239 static void i40iw_init_tcp_ctx(struct i40iw_cm_node *cm_node,
3240                                struct i40iw_tcp_offload_info *tcp_info,
3241                                struct i40iw_qp *iwqp)
3242 {
3243         tcp_info->ipv4 = cm_node->ipv4;
3244         tcp_info->drop_ooo_seg = true;
3245         tcp_info->wscale = true;
3246         tcp_info->ignore_tcp_opt = true;
3247         tcp_info->ignore_tcp_uns_opt = true;
3248         tcp_info->no_nagle = false;
3249
3250         tcp_info->ttl = I40IW_DEFAULT_TTL;
3251         tcp_info->rtt_var = cpu_to_le32(I40IW_DEFAULT_RTT_VAR);
3252         tcp_info->ss_thresh = cpu_to_le32(I40IW_DEFAULT_SS_THRESH);
3253         tcp_info->rexmit_thresh = I40IW_DEFAULT_REXMIT_THRESH;
3254
3255         tcp_info->tcp_state = I40IW_TCP_STATE_ESTABLISHED;
3256         tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale;
3257         tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale;
3258
3259         tcp_info->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3260         tcp_info->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
3261         tcp_info->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
3262         tcp_info->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3263
3264         tcp_info->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3265         tcp_info->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss);
3266         tcp_info->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
3267         tcp_info->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3268         tcp_info->max_snd_window = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
3269         tcp_info->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
3270                                         cm_node->tcp_cntxt.rcv_wscale);
3271
3272         tcp_info->flow_label = 0;
3273         tcp_info->snd_mss = cpu_to_le32(((u32)cm_node->tcp_cntxt.mss));
3274         if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
3275                 tcp_info->insert_vlan_tag = true;
3276                 tcp_info->vlan_tag = cpu_to_le16(((u16)cm_node->user_pri << I40IW_VLAN_PRIO_SHIFT) |
3277                                                   cm_node->vlan_id);
3278         }
3279         if (cm_node->ipv4) {
3280                 tcp_info->src_port = cpu_to_le16(cm_node->loc_port);
3281                 tcp_info->dst_port = cpu_to_le16(cm_node->rem_port);
3282
3283                 tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[0]);
3284                 tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[0]);
3285                 tcp_info->arp_idx =
3286                         cpu_to_le16((u16)i40iw_arp_table(
3287                                                          iwqp->iwdev,
3288                                                          &tcp_info->dest_ip_addr3,
3289                                                          true,
3290                                                          NULL,
3291                                                          I40IW_ARP_RESOLVE));
3292         } else {
3293                 tcp_info->src_port = cpu_to_le16(cm_node->loc_port);
3294                 tcp_info->dst_port = cpu_to_le16(cm_node->rem_port);
3295                 tcp_info->dest_ip_addr0 = cpu_to_le32(cm_node->rem_addr[0]);
3296                 tcp_info->dest_ip_addr1 = cpu_to_le32(cm_node->rem_addr[1]);
3297                 tcp_info->dest_ip_addr2 = cpu_to_le32(cm_node->rem_addr[2]);
3298                 tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[3]);
3299                 tcp_info->local_ipaddr0 = cpu_to_le32(cm_node->loc_addr[0]);
3300                 tcp_info->local_ipaddr1 = cpu_to_le32(cm_node->loc_addr[1]);
3301                 tcp_info->local_ipaddr2 = cpu_to_le32(cm_node->loc_addr[2]);
3302                 tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[3]);
3303                 tcp_info->arp_idx =
3304                         cpu_to_le16((u16)i40iw_arp_table(
3305                                                          iwqp->iwdev,
3306                                                          &tcp_info->dest_ip_addr0,
3307                                                          false,
3308                                                          NULL,
3309                                                          I40IW_ARP_RESOLVE));
3310         }
3311 }
3312
3313 /**
3314  * i40iw_cm_init_tsa_conn - setup qp for RTS
3315  * @iwqp: associate qp for the connection
3316  * @cm_node: connection's node
3317  */
3318 static void i40iw_cm_init_tsa_conn(struct i40iw_qp *iwqp,
3319                                    struct i40iw_cm_node *cm_node)
3320 {
3321         struct i40iw_tcp_offload_info tcp_info;
3322         struct i40iwarp_offload_info *iwarp_info;
3323         struct i40iw_qp_host_ctx_info *ctx_info;
3324         struct i40iw_device *iwdev = iwqp->iwdev;
3325         struct i40iw_sc_dev *dev = &iwqp->iwdev->sc_dev;
3326
3327         memset(&tcp_info, 0x00, sizeof(struct i40iw_tcp_offload_info));
3328         iwarp_info = &iwqp->iwarp_info;
3329         ctx_info = &iwqp->ctx_info;
3330
3331         ctx_info->tcp_info = &tcp_info;
3332         ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id;
3333         ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id;
3334
3335         iwarp_info->ord_size = cm_node->ord_size;
3336         iwarp_info->ird_size = i40iw_derive_hw_ird_setting(cm_node->ird_size);
3337
3338         if (iwarp_info->ord_size == 1)
3339                 iwarp_info->ord_size = 2;
3340
3341         iwarp_info->rd_enable = true;
3342         iwarp_info->rdmap_ver = 1;
3343         iwarp_info->ddp_ver = 1;
3344
3345         iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id;
3346
3347         ctx_info->tcp_info_valid = true;
3348         ctx_info->iwarp_info_valid = true;
3349         ctx_info->add_to_qoslist = true;
3350         ctx_info->user_pri = cm_node->user_pri;
3351
3352         i40iw_init_tcp_ctx(cm_node, &tcp_info, iwqp);
3353         if (cm_node->snd_mark_en) {
3354                 iwarp_info->snd_mark_en = true;
3355                 iwarp_info->snd_mark_offset = (tcp_info.snd_nxt &
3356                                 SNDMARKER_SEQNMASK) + cm_node->lsmm_size;
3357         }
3358
3359         cm_node->state = I40IW_CM_STATE_OFFLOADED;
3360         tcp_info.tcp_state = I40IW_TCP_STATE_ESTABLISHED;
3361         tcp_info.src_mac_addr_idx = iwdev->mac_ip_table_idx;
3362         tcp_info.tos = cm_node->tos;
3363
3364         dev->iw_priv_qp_ops->qp_setctx(&iwqp->sc_qp, (u64 *)(iwqp->host_ctx.va), ctx_info);
3365
3366         /* once tcp_info is set, no need to do it again */
3367         ctx_info->tcp_info_valid = false;
3368         ctx_info->iwarp_info_valid = false;
3369         ctx_info->add_to_qoslist = false;
3370 }
3371
3372 /**
3373  * i40iw_cm_disconn - when a connection is being closed
3374  * @iwqp: associate qp for the connection
3375  */
3376 void i40iw_cm_disconn(struct i40iw_qp *iwqp)
3377 {
3378         struct disconn_work *work;
3379         struct i40iw_device *iwdev = iwqp->iwdev;
3380         struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3381         unsigned long flags;
3382
3383         work = kzalloc(sizeof(*work), GFP_ATOMIC);
3384         if (!work)
3385                 return; /* Timer will clean up */
3386
3387         spin_lock_irqsave(&iwdev->qptable_lock, flags);
3388         if (!iwdev->qp_table[iwqp->ibqp.qp_num]) {
3389                 spin_unlock_irqrestore(&iwdev->qptable_lock, flags);
3390                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM,
3391                             "%s qp_id %d is already freed\n",
3392                              __func__, iwqp->ibqp.qp_num);
3393                 kfree(work);
3394                 return;
3395         }
3396         i40iw_add_ref(&iwqp->ibqp);
3397         spin_unlock_irqrestore(&iwdev->qptable_lock, flags);
3398
3399         work->iwqp = iwqp;
3400         INIT_WORK(&work->work, i40iw_disconnect_worker);
3401         queue_work(cm_core->disconn_wq, &work->work);
3402         return;
3403 }
3404
3405 /**
3406  * i40iw_qp_disconnect - free qp and close cm
3407  * @iwqp: associate qp for the connection
3408  */
3409 static void i40iw_qp_disconnect(struct i40iw_qp *iwqp)
3410 {
3411         struct i40iw_device *iwdev;
3412         struct i40iw_ib_device *iwibdev;
3413
3414         iwdev = to_iwdev(iwqp->ibqp.device);
3415         if (!iwdev) {
3416                 i40iw_pr_err("iwdev == NULL\n");
3417                 return;
3418         }
3419
3420         iwibdev = iwdev->iwibdev;
3421
3422         if (iwqp->active_conn) {
3423                 /* indicate this connection is NOT active */
3424                 iwqp->active_conn = 0;
3425         } else {
3426                 /* Need to free the Last Streaming Mode Message */
3427                 if (iwqp->ietf_mem.va) {
3428                         if (iwqp->lsmm_mr)
3429                                 iwibdev->ibdev.dereg_mr(iwqp->lsmm_mr);
3430                         i40iw_free_dma_mem(iwdev->sc_dev.hw, &iwqp->ietf_mem);
3431                 }
3432         }
3433
3434         /* close the CM node down if it is still active */
3435         if (iwqp->cm_node) {
3436                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "%s Call close API\n", __func__);
3437                 i40iw_cm_close(iwqp->cm_node);
3438         }
3439 }
3440
3441 /**
3442  * i40iw_cm_disconn_true - called by worker thread to disconnect qp
3443  * @iwqp: associate qp for the connection
3444  */
3445 static void i40iw_cm_disconn_true(struct i40iw_qp *iwqp)
3446 {
3447         struct iw_cm_id *cm_id;
3448         struct i40iw_device *iwdev;
3449         struct i40iw_sc_qp *qp = &iwqp->sc_qp;
3450         u16 last_ae;
3451         u8 original_hw_tcp_state;
3452         u8 original_ibqp_state;
3453         int disconn_status = 0;
3454         int issue_disconn = 0;
3455         int issue_close = 0;
3456         int issue_flush = 0;
3457         struct ib_event ibevent;
3458         unsigned long flags;
3459         int ret;
3460
3461         if (!iwqp) {
3462                 i40iw_pr_err("iwqp == NULL\n");
3463                 return;
3464         }
3465
3466         spin_lock_irqsave(&iwqp->lock, flags);
3467         cm_id = iwqp->cm_id;
3468         /* make sure we havent already closed this connection */
3469         if (!cm_id) {
3470                 spin_unlock_irqrestore(&iwqp->lock, flags);
3471                 return;
3472         }
3473
3474         iwdev = to_iwdev(iwqp->ibqp.device);
3475
3476         original_hw_tcp_state = iwqp->hw_tcp_state;
3477         original_ibqp_state = iwqp->ibqp_state;
3478         last_ae = iwqp->last_aeq;
3479
3480         if (qp->term_flags) {
3481                 issue_disconn = 1;
3482                 issue_close = 1;
3483                 iwqp->cm_id = NULL;
3484                 /*When term timer expires after cm_timer, don't want
3485                  *terminate-handler to issue cm_disconn which can re-free
3486                  *a QP even after its refcnt=0.
3487                  */
3488                 i40iw_terminate_del_timer(qp);
3489                 if (!iwqp->flush_issued) {
3490                         iwqp->flush_issued = 1;
3491                         issue_flush = 1;
3492                 }
3493         } else if ((original_hw_tcp_state == I40IW_TCP_STATE_CLOSE_WAIT) ||
3494                    ((original_ibqp_state == IB_QPS_RTS) &&
3495                     (last_ae == I40IW_AE_LLP_CONNECTION_RESET))) {
3496                 issue_disconn = 1;
3497                 if (last_ae == I40IW_AE_LLP_CONNECTION_RESET)
3498                         disconn_status = -ECONNRESET;
3499         }
3500
3501         if (((original_hw_tcp_state == I40IW_TCP_STATE_CLOSED) ||
3502              (original_hw_tcp_state == I40IW_TCP_STATE_TIME_WAIT) ||
3503              (last_ae == I40IW_AE_RDMAP_ROE_BAD_LLP_CLOSE) ||
3504              (last_ae == I40IW_AE_LLP_CONNECTION_RESET) ||
3505               iwdev->reset)) {
3506                 issue_close = 1;
3507                 iwqp->cm_id = NULL;
3508                 if (!iwqp->flush_issued) {
3509                         iwqp->flush_issued = 1;
3510                         issue_flush = 1;
3511                 }
3512         }
3513
3514         spin_unlock_irqrestore(&iwqp->lock, flags);
3515         if (issue_flush && !iwqp->destroyed) {
3516                 /* Flush the queues */
3517                 i40iw_flush_wqes(iwdev, iwqp);
3518
3519                 if (qp->term_flags && iwqp->ibqp.event_handler) {
3520                         ibevent.device = iwqp->ibqp.device;
3521                         ibevent.event = (qp->eventtype == TERM_EVENT_QP_FATAL) ?
3522                                         IB_EVENT_QP_FATAL : IB_EVENT_QP_ACCESS_ERR;
3523                         ibevent.element.qp = &iwqp->ibqp;
3524                         iwqp->ibqp.event_handler(&ibevent, iwqp->ibqp.qp_context);
3525                 }
3526         }
3527
3528         if (cm_id && cm_id->event_handler) {
3529                 if (issue_disconn) {
3530                         ret = i40iw_send_cm_event(NULL,
3531                                                   cm_id,
3532                                                   IW_CM_EVENT_DISCONNECT,
3533                                                   disconn_status);
3534
3535                         if (ret)
3536                                 i40iw_debug(&iwdev->sc_dev,
3537                                             I40IW_DEBUG_CM,
3538                                             "disconnect event failed %s: - cm_id = %p\n",
3539                                             __func__, cm_id);
3540                 }
3541                 if (issue_close) {
3542                         i40iw_qp_disconnect(iwqp);
3543                         cm_id->provider_data = iwqp;
3544                         ret = i40iw_send_cm_event(NULL, cm_id, IW_CM_EVENT_CLOSE, 0);
3545                         if (ret)
3546                                 i40iw_debug(&iwdev->sc_dev,
3547                                             I40IW_DEBUG_CM,
3548                                             "close event failed %s: - cm_id = %p\n",
3549                                             __func__, cm_id);
3550                         cm_id->rem_ref(cm_id);
3551                 }
3552         }
3553 }
3554
3555 /**
3556  * i40iw_disconnect_worker - worker for connection close
3557  * @work: points or disconn structure
3558  */
3559 static void i40iw_disconnect_worker(struct work_struct *work)
3560 {
3561         struct disconn_work *dwork = container_of(work, struct disconn_work, work);
3562         struct i40iw_qp *iwqp = dwork->iwqp;
3563
3564         kfree(dwork);
3565         i40iw_cm_disconn_true(iwqp);
3566         i40iw_rem_ref(&iwqp->ibqp);
3567 }
3568
3569 /**
3570  * i40iw_accept - registered call for connection to be accepted
3571  * @cm_id: cm information for passive connection
3572  * @conn_param: accpet parameters
3573  */
3574 int i40iw_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3575 {
3576         struct ib_qp *ibqp;
3577         struct i40iw_qp *iwqp;
3578         struct i40iw_device *iwdev;
3579         struct i40iw_sc_dev *dev;
3580         struct i40iw_cm_node *cm_node;
3581         struct ib_qp_attr attr;
3582         int passive_state;
3583         struct ib_mr *ibmr;
3584         struct i40iw_pd *iwpd;
3585         u16 buf_len = 0;
3586         struct i40iw_kmem_info accept;
3587         enum i40iw_status_code status;
3588         u64 tagged_offset;
3589
3590         memset(&attr, 0, sizeof(attr));
3591         ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn);
3592         if (!ibqp)
3593                 return -EINVAL;
3594
3595         iwqp = to_iwqp(ibqp);
3596         iwdev = iwqp->iwdev;
3597         dev = &iwdev->sc_dev;
3598         cm_node = (struct i40iw_cm_node *)cm_id->provider_data;
3599
3600         if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) {
3601                 cm_node->ipv4 = true;
3602                 cm_node->vlan_id = i40iw_get_vlan_ipv4(cm_node->loc_addr);
3603         } else {
3604                 cm_node->ipv4 = false;
3605                 i40iw_netdev_vlan_ipv6(cm_node->loc_addr, &cm_node->vlan_id);
3606         }
3607         i40iw_debug(cm_node->dev,
3608                     I40IW_DEBUG_CM,
3609                     "Accept vlan_id=%d\n",
3610                     cm_node->vlan_id);
3611         if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
3612                 if (cm_node->loopbackpartner)
3613                         i40iw_rem_ref_cm_node(cm_node->loopbackpartner);
3614                 i40iw_rem_ref_cm_node(cm_node);
3615                 return -EINVAL;
3616         }
3617
3618         passive_state = atomic_add_return(1, &cm_node->passive_state);
3619         if (passive_state == I40IW_SEND_RESET_EVENT) {
3620                 i40iw_rem_ref_cm_node(cm_node);
3621                 return -ECONNRESET;
3622         }
3623
3624         cm_node->cm_core->stats_accepts++;
3625         iwqp->cm_node = (void *)cm_node;
3626         cm_node->iwqp = iwqp;
3627
3628         buf_len = conn_param->private_data_len + I40IW_MAX_IETF_SIZE;
3629
3630         status = i40iw_allocate_dma_mem(dev->hw, &iwqp->ietf_mem, buf_len, 1);
3631
3632         if (status)
3633                 return -ENOMEM;
3634         cm_node->pdata.size = conn_param->private_data_len;
3635         accept.addr = iwqp->ietf_mem.va;
3636         accept.size = i40iw_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY);
3637         memcpy(accept.addr + accept.size, conn_param->private_data,
3638                conn_param->private_data_len);
3639
3640         /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3641         if ((cm_node->ipv4 &&
3642              !i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
3643             (!cm_node->ipv4 &&
3644              !i40iw_ipv6_is_loopback(cm_node->loc_addr, cm_node->rem_addr))) {
3645                 iwpd = iwqp->iwpd;
3646                 tagged_offset = (uintptr_t)iwqp->ietf_mem.va;
3647                 ibmr = i40iw_reg_phys_mr(&iwpd->ibpd,
3648                                          iwqp->ietf_mem.pa,
3649                                          buf_len,
3650                                          IB_ACCESS_LOCAL_WRITE,
3651                                          &tagged_offset);
3652                 if (IS_ERR(ibmr)) {
3653                         i40iw_free_dma_mem(dev->hw, &iwqp->ietf_mem);
3654                         return -ENOMEM;
3655                 }
3656
3657                 ibmr->pd = &iwpd->ibpd;
3658                 ibmr->device = iwpd->ibpd.device;
3659                 iwqp->lsmm_mr = ibmr;
3660                 if (iwqp->page)
3661                         iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
3662                 dev->iw_priv_qp_ops->qp_send_lsmm(&iwqp->sc_qp,
3663                                                         iwqp->ietf_mem.va,
3664                                                         (accept.size + conn_param->private_data_len),
3665                                                         ibmr->lkey);
3666
3667         } else {
3668                 if (iwqp->page)
3669                         iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
3670                 dev->iw_priv_qp_ops->qp_send_lsmm(&iwqp->sc_qp, NULL, 0, 0);
3671         }
3672
3673         if (iwqp->page)
3674                 kunmap(iwqp->page);
3675
3676         iwqp->cm_id = cm_id;
3677         cm_node->cm_id = cm_id;
3678
3679         cm_id->provider_data = (void *)iwqp;
3680         iwqp->active_conn = 0;
3681
3682         cm_node->lsmm_size = accept.size + conn_param->private_data_len;
3683         i40iw_cm_init_tsa_conn(iwqp, cm_node);
3684         cm_id->add_ref(cm_id);
3685         i40iw_add_ref(&iwqp->ibqp);
3686
3687         i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0);
3688
3689         attr.qp_state = IB_QPS_RTS;
3690         cm_node->qhash_set = false;
3691         i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
3692         if (cm_node->loopbackpartner) {
3693                 cm_node->loopbackpartner->pdata.size = conn_param->private_data_len;
3694
3695                 /* copy entire MPA frame to our cm_node's frame */
3696                 memcpy(cm_node->loopbackpartner->pdata_buf,
3697                        conn_param->private_data,
3698                        conn_param->private_data_len);
3699                 i40iw_create_event(cm_node->loopbackpartner, I40IW_CM_EVENT_CONNECTED);
3700         }
3701
3702         cm_node->accelerated = 1;
3703         if (cm_node->accept_pend) {
3704                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
3705                 cm_node->accept_pend = 0;
3706         }
3707         return 0;
3708 }
3709
3710 /**
3711  * i40iw_reject - registered call for connection to be rejected
3712  * @cm_id: cm information for passive connection
3713  * @pdata: private data to be sent
3714  * @pdata_len: private data length
3715  */
3716 int i40iw_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3717 {
3718         struct i40iw_device *iwdev;
3719         struct i40iw_cm_node *cm_node;
3720         struct i40iw_cm_node *loopback;
3721
3722         cm_node = (struct i40iw_cm_node *)cm_id->provider_data;
3723         loopback = cm_node->loopbackpartner;
3724         cm_node->cm_id = cm_id;
3725         cm_node->pdata.size = pdata_len;
3726
3727         iwdev = to_iwdev(cm_id->device);
3728         if (!iwdev)
3729                 return -EINVAL;
3730         cm_node->cm_core->stats_rejects++;
3731
3732         if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER)
3733                 return -EINVAL;
3734
3735         if (loopback) {
3736                 memcpy(&loopback->pdata_buf, pdata, pdata_len);
3737                 loopback->pdata.size = pdata_len;
3738         }
3739
3740         return i40iw_cm_reject(cm_node, pdata, pdata_len);
3741 }
3742
3743 /**
3744  * i40iw_connect - registered call for connection to be established
3745  * @cm_id: cm information for passive connection
3746  * @conn_param: Information about the connection
3747  */
3748 int i40iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3749 {
3750         struct ib_qp *ibqp;
3751         struct i40iw_qp *iwqp;
3752         struct i40iw_device *iwdev;
3753         struct i40iw_cm_node *cm_node;
3754         struct i40iw_cm_info cm_info;
3755         struct sockaddr_in *laddr;
3756         struct sockaddr_in *raddr;
3757         struct sockaddr_in6 *laddr6;
3758         struct sockaddr_in6 *raddr6;
3759         int ret = 0;
3760         unsigned long flags;
3761
3762         ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn);
3763         if (!ibqp)
3764                 return -EINVAL;
3765         iwqp = to_iwqp(ibqp);
3766         if (!iwqp)
3767                 return -EINVAL;
3768         iwdev = to_iwdev(iwqp->ibqp.device);
3769         if (!iwdev)
3770                 return -EINVAL;
3771
3772         laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3773         raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
3774         laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3775         raddr6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr;
3776
3777         if (!(laddr->sin_port) || !(raddr->sin_port))
3778                 return -EINVAL;
3779
3780         iwqp->active_conn = 1;
3781         iwqp->cm_id = NULL;
3782         cm_id->provider_data = iwqp;
3783
3784         /* set up the connection params for the node */
3785         if (cm_id->remote_addr.ss_family == AF_INET) {
3786                 cm_info.ipv4 = true;
3787                 memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr));
3788                 memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr));
3789                 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3790                 cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr);
3791                 cm_info.loc_port = ntohs(laddr->sin_port);
3792                 cm_info.rem_port = ntohs(raddr->sin_port);
3793                 cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr);
3794         } else {
3795                 cm_info.ipv4 = false;
3796                 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3797                                     laddr6->sin6_addr.in6_u.u6_addr32);
3798                 i40iw_copy_ip_ntohl(cm_info.rem_addr,
3799                                     raddr6->sin6_addr.in6_u.u6_addr32);
3800                 cm_info.loc_port = ntohs(laddr6->sin6_port);
3801                 cm_info.rem_port = ntohs(raddr6->sin6_port);
3802                 i40iw_netdev_vlan_ipv6(cm_info.loc_addr, &cm_info.vlan_id);
3803         }
3804         cm_info.cm_id = cm_id;
3805         cm_info.tos = cm_id->tos;
3806         cm_info.user_pri = rt_tos2priority(cm_id->tos);
3807         i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB, "%s TOS:[%d] UP:[%d]\n",
3808                     __func__, cm_id->tos, cm_info.user_pri);
3809         cm_id->add_ref(cm_id);
3810         cm_node = i40iw_create_cm_node(&iwdev->cm_core, iwdev,
3811                                        conn_param->private_data_len,
3812                                        (void *)conn_param->private_data,
3813                                        &cm_info);
3814
3815         if (IS_ERR(cm_node)) {
3816                 ret = PTR_ERR(cm_node);
3817                 cm_id->rem_ref(cm_id);
3818                 return ret;
3819         }
3820
3821         if ((cm_info.ipv4 && (laddr->sin_addr.s_addr != raddr->sin_addr.s_addr)) ||
3822             (!cm_info.ipv4 && memcmp(laddr6->sin6_addr.in6_u.u6_addr32,
3823                                      raddr6->sin6_addr.in6_u.u6_addr32,
3824                                      sizeof(laddr6->sin6_addr.in6_u.u6_addr32)))) {
3825                 if (i40iw_manage_qhash(iwdev, &cm_info, I40IW_QHASH_TYPE_TCP_ESTABLISHED,
3826                                        I40IW_QHASH_MANAGE_TYPE_ADD, NULL, true)) {
3827                         ret = -EINVAL;
3828                         goto err;
3829                 }
3830                 cm_node->qhash_set = true;
3831         }
3832
3833         spin_lock_irqsave(&iwdev->cm_core.ht_lock, flags);
3834         if (!test_and_set_bit(cm_info.loc_port, iwdev->cm_core.active_side_ports)) {
3835                 spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags);
3836                 if (i40iw_manage_apbvt(iwdev, cm_info.loc_port, I40IW_MANAGE_APBVT_ADD)) {
3837                         ret =  -EINVAL;
3838                         goto err;
3839                 }
3840         } else {
3841                 spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags);
3842         }
3843
3844         cm_node->apbvt_set = true;
3845         i40iw_record_ird_ord(cm_node, conn_param->ird, conn_param->ord);
3846         if (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO &&
3847             !cm_node->ord_size)
3848                 cm_node->ord_size = 1;
3849
3850         iwqp->cm_node = cm_node;
3851         cm_node->iwqp = iwqp;
3852         iwqp->cm_id = cm_id;
3853         i40iw_add_ref(&iwqp->ibqp);
3854
3855         if (cm_node->state != I40IW_CM_STATE_OFFLOADED) {
3856                 cm_node->state = I40IW_CM_STATE_SYN_SENT;
3857                 ret = i40iw_send_syn(cm_node, 0);
3858                 if (ret)
3859                         goto err;
3860         }
3861
3862         i40iw_debug(cm_node->dev,
3863                     I40IW_DEBUG_CM,
3864                     "Api - connect(): port=0x%04x, cm_node=%p, cm_id = %p.\n",
3865                     cm_node->rem_port,
3866                     cm_node,
3867                     cm_node->cm_id);
3868
3869         return 0;
3870
3871 err:
3872         if (cm_info.ipv4)
3873                 i40iw_debug(&iwdev->sc_dev,
3874                             I40IW_DEBUG_CM,
3875                             "Api - connect() FAILED: dest addr=%pI4",
3876                             cm_info.rem_addr);
3877         else
3878                 i40iw_debug(&iwdev->sc_dev,
3879                             I40IW_DEBUG_CM,
3880                             "Api - connect() FAILED: dest addr=%pI6",
3881                             cm_info.rem_addr);
3882
3883         i40iw_rem_ref_cm_node(cm_node);
3884         cm_id->rem_ref(cm_id);
3885         iwdev->cm_core.stats_connect_errs++;
3886         return ret;
3887 }
3888
3889 /**
3890  * i40iw_create_listen - registered call creating listener
3891  * @cm_id: cm information for passive connection
3892  * @backlog: to max accept pending count
3893  */
3894 int i40iw_create_listen(struct iw_cm_id *cm_id, int backlog)
3895 {
3896         struct i40iw_device *iwdev;
3897         struct i40iw_cm_listener *cm_listen_node;
3898         struct i40iw_cm_info cm_info;
3899         enum i40iw_status_code ret;
3900         struct sockaddr_in *laddr;
3901         struct sockaddr_in6 *laddr6;
3902         bool wildcard = false;
3903
3904         iwdev = to_iwdev(cm_id->device);
3905         if (!iwdev)
3906                 return -EINVAL;
3907
3908         laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3909         laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3910         memset(&cm_info, 0, sizeof(cm_info));
3911         if (laddr->sin_family == AF_INET) {
3912                 cm_info.ipv4 = true;
3913                 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3914                 cm_info.loc_port = ntohs(laddr->sin_port);
3915
3916                 if (laddr->sin_addr.s_addr != INADDR_ANY)
3917                         cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr);
3918                 else
3919                         wildcard = true;
3920
3921         } else {
3922                 cm_info.ipv4 = false;
3923                 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3924                                     laddr6->sin6_addr.in6_u.u6_addr32);
3925                 cm_info.loc_port = ntohs(laddr6->sin6_port);
3926                 if (ipv6_addr_type(&laddr6->sin6_addr) != IPV6_ADDR_ANY)
3927                         i40iw_netdev_vlan_ipv6(cm_info.loc_addr,
3928                                                &cm_info.vlan_id);
3929                 else
3930                         wildcard = true;
3931         }
3932         cm_info.backlog = backlog;
3933         cm_info.cm_id = cm_id;
3934
3935         cm_listen_node = i40iw_make_listen_node(&iwdev->cm_core, iwdev, &cm_info);
3936         if (!cm_listen_node) {
3937                 i40iw_pr_err("cm_listen_node == NULL\n");
3938                 return -ENOMEM;
3939         }
3940
3941         cm_id->provider_data = cm_listen_node;
3942
3943         cm_listen_node->tos = cm_id->tos;
3944         cm_listen_node->user_pri = rt_tos2priority(cm_id->tos);
3945         cm_info.user_pri = cm_listen_node->user_pri;
3946
3947         if (!cm_listen_node->reused_node) {
3948                 if (wildcard) {
3949                         if (cm_info.ipv4)
3950                                 ret = i40iw_add_mqh_4(iwdev,
3951                                                       &cm_info,
3952                                                       cm_listen_node);
3953                         else
3954                                 ret = i40iw_add_mqh_6(iwdev,
3955                                                       &cm_info,
3956                                                       cm_listen_node);
3957                         if (ret)
3958                                 goto error;
3959
3960                         ret = i40iw_manage_apbvt(iwdev,
3961                                                  cm_info.loc_port,
3962                                                  I40IW_MANAGE_APBVT_ADD);
3963
3964                         if (ret)
3965                                 goto error;
3966                 } else {
3967                         ret = i40iw_manage_qhash(iwdev,
3968                                                  &cm_info,
3969                                                  I40IW_QHASH_TYPE_TCP_SYN,
3970                                                  I40IW_QHASH_MANAGE_TYPE_ADD,
3971                                                  NULL,
3972                                                  true);
3973                         if (ret)
3974                                 goto error;
3975                         cm_listen_node->qhash_set = true;
3976                         ret = i40iw_manage_apbvt(iwdev,
3977                                                  cm_info.loc_port,
3978                                                  I40IW_MANAGE_APBVT_ADD);
3979                         if (ret)
3980                                 goto error;
3981                 }
3982         }
3983         cm_id->add_ref(cm_id);
3984         cm_listen_node->cm_core->stats_listen_created++;
3985         return 0;
3986  error:
3987         i40iw_cm_del_listen(&iwdev->cm_core, (void *)cm_listen_node, false);
3988         return -EINVAL;
3989 }
3990
3991 /**
3992  * i40iw_destroy_listen - registered call to destroy listener
3993  * @cm_id: cm information for passive connection
3994  */
3995 int i40iw_destroy_listen(struct iw_cm_id *cm_id)
3996 {
3997         struct i40iw_device *iwdev;
3998
3999         iwdev = to_iwdev(cm_id->device);
4000         if (cm_id->provider_data)
4001                 i40iw_cm_del_listen(&iwdev->cm_core, cm_id->provider_data, true);
4002         else
4003                 i40iw_pr_err("cm_id->provider_data was NULL\n");
4004
4005         cm_id->rem_ref(cm_id);
4006
4007         return 0;
4008 }
4009
4010 /**
4011  * i40iw_cm_event_connected - handle connected active node
4012  * @event: the info for cm_node of connection
4013  */
4014 static void i40iw_cm_event_connected(struct i40iw_cm_event *event)
4015 {
4016         struct i40iw_qp *iwqp;
4017         struct i40iw_device *iwdev;
4018         struct i40iw_cm_node *cm_node;
4019         struct i40iw_sc_dev *dev;
4020         struct ib_qp_attr attr;
4021         struct iw_cm_id *cm_id;
4022         int status;
4023         bool read0;
4024
4025         cm_node = event->cm_node;
4026         cm_id = cm_node->cm_id;
4027         iwqp = (struct i40iw_qp *)cm_id->provider_data;
4028         iwdev = to_iwdev(iwqp->ibqp.device);
4029         dev = &iwdev->sc_dev;
4030
4031         if (iwqp->destroyed) {
4032                 status = -ETIMEDOUT;
4033                 goto error;
4034         }
4035         i40iw_cm_init_tsa_conn(iwqp, cm_node);
4036         read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO);
4037         if (iwqp->page)
4038                 iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
4039         dev->iw_priv_qp_ops->qp_send_rtt(&iwqp->sc_qp, read0);
4040         if (iwqp->page)
4041                 kunmap(iwqp->page);
4042         status = i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 0);
4043         if (status)
4044                 i40iw_pr_err("send cm event\n");
4045
4046         memset(&attr, 0, sizeof(attr));
4047         attr.qp_state = IB_QPS_RTS;
4048         cm_node->qhash_set = false;
4049         i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
4050
4051         cm_node->accelerated = 1;
4052
4053         return;
4054
4055 error:
4056         iwqp->cm_id = NULL;
4057         cm_id->provider_data = NULL;
4058         i40iw_send_cm_event(event->cm_node,
4059                             cm_id,
4060                             IW_CM_EVENT_CONNECT_REPLY,
4061                             status);
4062         cm_id->rem_ref(cm_id);
4063         i40iw_rem_ref_cm_node(event->cm_node);
4064 }
4065
4066 /**
4067  * i40iw_cm_event_reset - handle reset
4068  * @event: the info for cm_node of connection
4069  */
4070 static void i40iw_cm_event_reset(struct i40iw_cm_event *event)
4071 {
4072         struct i40iw_cm_node *cm_node = event->cm_node;
4073         struct iw_cm_id   *cm_id = cm_node->cm_id;
4074         struct i40iw_qp *iwqp;
4075
4076         if (!cm_id)
4077                 return;
4078
4079         iwqp = cm_id->provider_data;
4080         if (!iwqp)
4081                 return;
4082
4083         i40iw_debug(cm_node->dev,
4084                     I40IW_DEBUG_CM,
4085                     "reset event %p - cm_id = %p\n",
4086                      event->cm_node, cm_id);
4087         iwqp->cm_id = NULL;
4088
4089         i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT, -ECONNRESET);
4090         i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0);
4091 }
4092
4093 /**
4094  * i40iw_cm_event_handler - worker thread callback to send event to cm upper layer
4095  * @work: pointer of cm event info.
4096  */
4097 static void i40iw_cm_event_handler(struct work_struct *work)
4098 {
4099         struct i40iw_cm_event *event = container_of(work,
4100                                                     struct i40iw_cm_event,
4101                                                     event_work);
4102         struct i40iw_cm_node *cm_node;
4103
4104         if (!event || !event->cm_node || !event->cm_node->cm_core)
4105                 return;
4106
4107         cm_node = event->cm_node;
4108
4109         switch (event->type) {
4110         case I40IW_CM_EVENT_MPA_REQ:
4111                 i40iw_send_cm_event(cm_node,
4112                                     cm_node->cm_id,
4113                                     IW_CM_EVENT_CONNECT_REQUEST,
4114                                     0);
4115                 break;
4116         case I40IW_CM_EVENT_RESET:
4117                 i40iw_cm_event_reset(event);
4118                 break;
4119         case I40IW_CM_EVENT_CONNECTED:
4120                 if (!event->cm_node->cm_id ||
4121                     (event->cm_node->state != I40IW_CM_STATE_OFFLOADED))
4122                         break;
4123                 i40iw_cm_event_connected(event);
4124                 break;
4125         case I40IW_CM_EVENT_MPA_REJECT:
4126                 if (!event->cm_node->cm_id ||
4127                     (cm_node->state == I40IW_CM_STATE_OFFLOADED))
4128                         break;
4129                 i40iw_send_cm_event(cm_node,
4130                                     cm_node->cm_id,
4131                                     IW_CM_EVENT_CONNECT_REPLY,
4132                                     -ECONNREFUSED);
4133                 break;
4134         case I40IW_CM_EVENT_ABORTED:
4135                 if (!event->cm_node->cm_id ||
4136                     (event->cm_node->state == I40IW_CM_STATE_OFFLOADED))
4137                         break;
4138                 i40iw_event_connect_error(event);
4139                 break;
4140         default:
4141                 i40iw_pr_err("event type = %d\n", event->type);
4142                 break;
4143         }
4144
4145         event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
4146         i40iw_rem_ref_cm_node(event->cm_node);
4147         kfree(event);
4148 }
4149
4150 /**
4151  * i40iw_cm_post_event - queue event request for worker thread
4152  * @event: cm node's info for up event call
4153  */
4154 static void i40iw_cm_post_event(struct i40iw_cm_event *event)
4155 {
4156         atomic_inc(&event->cm_node->ref_count);
4157         event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
4158         INIT_WORK(&event->event_work, i40iw_cm_event_handler);
4159
4160         queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
4161 }
4162
4163 /**
4164  * i40iw_qhash_ctrl - enable/disable qhash for list
4165  * @iwdev: device pointer
4166  * @parent_listen_node: parent listen node
4167  * @nfo: cm info node
4168  * @ipaddr: Pointer to IPv4 or IPv6 address
4169  * @ipv4: flag indicating IPv4 when true
4170  * @ifup: flag indicating interface up when true
4171  *
4172  * Enables or disables the qhash for the node in the child
4173  * listen list that matches ipaddr. If no matching IP was found
4174  * it will allocate and add a new child listen node to the
4175  * parent listen node. The listen_list_lock is assumed to be
4176  * held when called.
4177  */
4178 static void i40iw_qhash_ctrl(struct i40iw_device *iwdev,
4179                              struct i40iw_cm_listener *parent_listen_node,
4180                              struct i40iw_cm_info *nfo,
4181                              u32 *ipaddr, bool ipv4, bool ifup)
4182 {
4183         struct list_head *child_listen_list = &parent_listen_node->child_listen_list;
4184         struct i40iw_cm_listener *child_listen_node;
4185         struct list_head *pos, *tpos;
4186         enum i40iw_status_code ret;
4187         bool node_allocated = false;
4188         enum i40iw_quad_hash_manage_type op =
4189                 ifup ? I40IW_QHASH_MANAGE_TYPE_ADD : I40IW_QHASH_MANAGE_TYPE_DELETE;
4190
4191         list_for_each_safe(pos, tpos, child_listen_list) {
4192                 child_listen_node =
4193                         list_entry(pos,
4194                                    struct i40iw_cm_listener,
4195                                    child_listen_list);
4196                 if (!memcmp(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16))
4197                         goto set_qhash;
4198         }
4199
4200         /* if not found then add a child listener if interface is going up */
4201         if (!ifup)
4202                 return;
4203         child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
4204         if (!child_listen_node)
4205                 return;
4206         node_allocated = true;
4207         memcpy(child_listen_node, parent_listen_node, sizeof(*child_listen_node));
4208
4209         memcpy(child_listen_node->loc_addr, ipaddr,  ipv4 ? 4 : 16);
4210
4211 set_qhash:
4212         memcpy(nfo->loc_addr,
4213                child_listen_node->loc_addr,
4214                sizeof(nfo->loc_addr));
4215         nfo->vlan_id = child_listen_node->vlan_id;
4216         ret = i40iw_manage_qhash(iwdev, nfo,
4217                                  I40IW_QHASH_TYPE_TCP_SYN,
4218                                  op,
4219                                  NULL, false);
4220         if (!ret) {
4221                 child_listen_node->qhash_set = ifup;
4222                 if (node_allocated)
4223                         list_add(&child_listen_node->child_listen_list,
4224                                  &parent_listen_node->child_listen_list);
4225         } else if (node_allocated) {
4226                 kfree(child_listen_node);
4227         }
4228 }
4229
4230 /**
4231  * i40iw_cm_disconnect_all - disconnect all connected qp's
4232  * @iwdev: device pointer
4233  */
4234 void i40iw_cm_disconnect_all(struct i40iw_device *iwdev)
4235 {
4236         struct i40iw_cm_core *cm_core = &iwdev->cm_core;
4237         struct list_head *list_core_temp;
4238         struct list_head *list_node;
4239         struct i40iw_cm_node *cm_node;
4240         unsigned long flags;
4241         struct list_head connected_list;
4242         struct ib_qp_attr attr;
4243
4244         INIT_LIST_HEAD(&connected_list);
4245         spin_lock_irqsave(&cm_core->ht_lock, flags);
4246         list_for_each_safe(list_node, list_core_temp, &cm_core->connected_nodes) {
4247                 cm_node = container_of(list_node, struct i40iw_cm_node, list);
4248                 atomic_inc(&cm_node->ref_count);
4249                 list_add(&cm_node->connected_entry, &connected_list);
4250         }
4251         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
4252
4253         list_for_each_safe(list_node, list_core_temp, &connected_list) {
4254                 cm_node = container_of(list_node, struct i40iw_cm_node, connected_entry);
4255                 attr.qp_state = IB_QPS_ERR;
4256                 i40iw_modify_qp(&cm_node->iwqp->ibqp, &attr, IB_QP_STATE, NULL);
4257                 if (iwdev->reset)
4258                         i40iw_cm_disconn(cm_node->iwqp);
4259                 i40iw_rem_ref_cm_node(cm_node);
4260         }
4261 }
4262
4263 /**
4264  * i40iw_ifdown_notify - process an ifdown on an interface
4265  * @iwdev: device pointer
4266  * @ipaddr: Pointer to IPv4 or IPv6 address
4267  * @ipv4: flag indicating IPv4 when true
4268  * @ifup: flag indicating interface up when true
4269  */
4270 void i40iw_if_notify(struct i40iw_device *iwdev, struct net_device *netdev,
4271                      u32 *ipaddr, bool ipv4, bool ifup)
4272 {
4273         struct i40iw_cm_core *cm_core = &iwdev->cm_core;
4274         unsigned long flags;
4275         struct i40iw_cm_listener *listen_node;
4276         static const u32 ip_zero[4] = { 0, 0, 0, 0 };
4277         struct i40iw_cm_info nfo;
4278         u16 vlan_id = rdma_vlan_dev_vlan_id(netdev);
4279         enum i40iw_status_code ret;
4280         enum i40iw_quad_hash_manage_type op =
4281                 ifup ? I40IW_QHASH_MANAGE_TYPE_ADD : I40IW_QHASH_MANAGE_TYPE_DELETE;
4282
4283         /* Disable or enable qhash for listeners */
4284         spin_lock_irqsave(&cm_core->listen_list_lock, flags);
4285         list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
4286                 if (vlan_id == listen_node->vlan_id &&
4287                     (!memcmp(listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16) ||
4288                     !memcmp(listen_node->loc_addr, ip_zero, ipv4 ? 4 : 16))) {
4289                         memcpy(nfo.loc_addr, listen_node->loc_addr,
4290                                sizeof(nfo.loc_addr));
4291                         nfo.loc_port = listen_node->loc_port;
4292                         nfo.ipv4 = listen_node->ipv4;
4293                         nfo.vlan_id = listen_node->vlan_id;
4294                         nfo.user_pri = listen_node->user_pri;
4295                         if (!list_empty(&listen_node->child_listen_list)) {
4296                                 i40iw_qhash_ctrl(iwdev,
4297                                                  listen_node,
4298                                                  &nfo,
4299                                                  ipaddr, ipv4, ifup);
4300                         } else if (memcmp(listen_node->loc_addr, ip_zero,
4301                                           ipv4 ? 4 : 16)) {
4302                                 ret = i40iw_manage_qhash(iwdev,
4303                                                          &nfo,
4304                                                          I40IW_QHASH_TYPE_TCP_SYN,
4305                                                          op,
4306                                                          NULL,
4307                                                          false);
4308                                 if (!ret)
4309                                         listen_node->qhash_set = ifup;
4310                         }
4311                 }
4312         }
4313         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
4314
4315         /* disconnect any connected qp's on ifdown */
4316         if (!ifup)
4317                 i40iw_cm_disconnect_all(iwdev);
4318 }