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, u16 conn_ird, u16 conn_ord)
 129 {
 130         if (conn_ird > I40IW_MAX_IRD_SIZE)
 131                 conn_ird = I40IW_MAX_IRD_SIZE;
 132
 133         if (conn_ord > I40IW_MAX_ORD_SIZE)
 134                 conn_ord = I40IW_MAX_ORD_SIZE;
 135
 136         cm_node->ird_size = conn_ird;
 137         cm_node->ord_size = conn_ord;
 138 }
 139
 140 /**
 141  * i40iw_copy_ip_ntohl - change network to host ip
 142  * @dst: host ip
 143  * @src: big endian
 144  */
 145 void i40iw_copy_ip_ntohl(u32 *dst, __be32 *src)
 146 {
 147         *dst++ = ntohl(*src++);
 148         *dst++ = ntohl(*src++);
 149         *dst++ = ntohl(*src++);
 150         *dst = ntohl(*src);
 151 }
 152
 153 /**
 154  * i40iw_copy_ip_htonl - change host addr to network ip
 155  * @dst: host ip
 156  * @src: little endian
 157  */
 158 static inline void i40iw_copy_ip_htonl(__be32 *dst, u32 *src)
 159 {
 160         *dst++ = htonl(*src++);
 161         *dst++ = htonl(*src++);
 162         *dst++ = htonl(*src++);
 163         *dst = htonl(*src);
 164 }
 165
 166 /**
 167  * i40iw_fill_sockaddr4 - get addr info for passive connection
 168  * @cm_node: connection's node
 169  * @event: upper layer's cm event
 170  */
 171 static inline void i40iw_fill_sockaddr4(struct i40iw_cm_node *cm_node,
 172                                         struct iw_cm_event *event)
 173 {
 174         struct sockaddr_in *laddr = (struct sockaddr_in *)&event->local_addr;
 175         struct sockaddr_in *raddr = (struct sockaddr_in *)&event->remote_addr;
 176
 177         laddr->sin_family = AF_INET;
 178         raddr->sin_family = AF_INET;
 179
 180         laddr->sin_port = htons(cm_node->loc_port);
 181         raddr->sin_port = htons(cm_node->rem_port);
 182
 183         laddr->sin_addr.s_addr = htonl(cm_node->loc_addr[0]);
 184         raddr->sin_addr.s_addr = htonl(cm_node->rem_addr[0]);
 185 }
 186
 187 /**
 188  * i40iw_fill_sockaddr6 - get ipv6 addr info for passive side
 189  * @cm_node: connection's node
 190  * @event: upper layer's cm event
 191  */
 192 static inline void i40iw_fill_sockaddr6(struct i40iw_cm_node *cm_node,
 193                                         struct iw_cm_event *event)
 194 {
 195         struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)&event->local_addr;
 196         struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)&event->remote_addr;
 197
 198         laddr6->sin6_family = AF_INET6;
 199         raddr6->sin6_family = AF_INET6;
 200
 201         laddr6->sin6_port = htons(cm_node->loc_port);
 202         raddr6->sin6_port = htons(cm_node->rem_port);
 203
 204         i40iw_copy_ip_htonl(laddr6->sin6_addr.in6_u.u6_addr32,
 205                             cm_node->loc_addr);
 206         i40iw_copy_ip_htonl(raddr6->sin6_addr.in6_u.u6_addr32,
 207                             cm_node->rem_addr);
 208 }
 209
 210 /**
 211  * i40iw_get_addr_info
 212  * @cm_node: contains ip/tcp info
 213  * @cm_info: to get a copy of the cm_node ip/tcp info
 214 */
 215 static void i40iw_get_addr_info(struct i40iw_cm_node *cm_node,
 216                                 struct i40iw_cm_info *cm_info)
 217 {
 218         cm_info->ipv4 = cm_node->ipv4;
 219         cm_info->vlan_id = cm_node->vlan_id;
 220         memcpy(cm_info->loc_addr, cm_node->loc_addr, sizeof(cm_info->loc_addr));
 221         memcpy(cm_info->rem_addr, cm_node->rem_addr, sizeof(cm_info->rem_addr));
 222         cm_info->loc_port = cm_node->loc_port;
 223         cm_info->rem_port = cm_node->rem_port;
 224         cm_info->user_pri = cm_node->user_pri;
 225 }
 226
 227 /**
 228  * i40iw_get_cmevent_info - for cm event upcall
 229  * @cm_node: connection's node
 230  * @cm_id: upper layers cm struct for the event
 231  * @event: upper layer's cm event
 232  */
 233 static inline void i40iw_get_cmevent_info(struct i40iw_cm_node *cm_node,
 234                                           struct iw_cm_id *cm_id,
 235                                           struct iw_cm_event *event)
 236 {
 237         memcpy(&event->local_addr, &cm_id->m_local_addr,
 238                sizeof(event->local_addr));
 239         memcpy(&event->remote_addr, &cm_id->m_remote_addr,
 240                sizeof(event->remote_addr));
 241         if (cm_node) {
 242                 event->private_data = (void *)cm_node->pdata_buf;
 243                 event->private_data_len = (u8)cm_node->pdata.size;
 244                 event->ird = cm_node->ird_size;
 245                 event->ord = cm_node->ord_size;
 246         }
 247 }
 248
 249 /**
 250  * i40iw_send_cm_event - upcall cm's event handler
 251  * @cm_node: connection's node
 252  * @cm_id: upper layer's cm info struct
 253  * @type: Event type to indicate
 254  * @status: status for the event type
 255  */
 256 static int i40iw_send_cm_event(struct i40iw_cm_node *cm_node,
 257                                struct iw_cm_id *cm_id,
 258                                enum iw_cm_event_type type,
 259                                int status)
 260 {
 261         struct iw_cm_event event;
 262
 263         memset(&event, 0, sizeof(event));
 264         event.event = type;
 265         event.status = status;
 266         switch (type) {
 267         case IW_CM_EVENT_CONNECT_REQUEST:
 268                 if (cm_node->ipv4)
 269                         i40iw_fill_sockaddr4(cm_node, &event);
 270                 else
 271                         i40iw_fill_sockaddr6(cm_node, &event);
 272                 event.provider_data = (void *)cm_node;
 273                 event.private_data = (void *)cm_node->pdata_buf;
 274                 event.private_data_len = (u8)cm_node->pdata.size;
 275                 event.ird = cm_node->ird_size;
 276                 break;
 277         case IW_CM_EVENT_CONNECT_REPLY:
 278                 i40iw_get_cmevent_info(cm_node, cm_id, &event);
 279                 break;
 280         case IW_CM_EVENT_ESTABLISHED:
 281                 event.ird = cm_node->ird_size;
 282                 event.ord = cm_node->ord_size;
 283                 break;
 284         case IW_CM_EVENT_DISCONNECT:
 285                 break;
 286         case IW_CM_EVENT_CLOSE:
 287                 break;
 288         default:
 289                 i40iw_pr_err("event type received type = %d\n", type);
 290                 return -1;
 291         }
 292         return cm_id->event_handler(cm_id, &event);
 293 }
 294
 295 /**
 296  * i40iw_create_event - create cm event
 297  * @cm_node: connection's node
 298  * @type: Event type to generate
 299  */
 300 static struct i40iw_cm_event *i40iw_create_event(struct i40iw_cm_node *cm_node,
 301                                                  enum i40iw_cm_event_type type)
 302 {
 303         struct i40iw_cm_event *event;
 304
 305         if (!cm_node->cm_id)
 306                 return NULL;
 307
 308         event = kzalloc(sizeof(*event), GFP_ATOMIC);
 309
 310         if (!event)
 311                 return NULL;
 312
 313         event->type = type;
 314         event->cm_node = cm_node;
 315         memcpy(event->cm_info.rem_addr, cm_node->rem_addr, sizeof(event->cm_info.rem_addr));
 316         memcpy(event->cm_info.loc_addr, cm_node->loc_addr, sizeof(event->cm_info.loc_addr));
 317         event->cm_info.rem_port = cm_node->rem_port;
 318         event->cm_info.loc_port = cm_node->loc_port;
 319         event->cm_info.cm_id = cm_node->cm_id;
 320
 321         i40iw_debug(cm_node->dev,
 322                     I40IW_DEBUG_CM,
 323                     "node=%p event=%p type=%u dst=%pI4 src=%pI4\n",
 324                     cm_node,
 325                     event,
 326                     type,
 327                     event->cm_info.loc_addr,
 328                     event->cm_info.rem_addr);
 329
 330         i40iw_cm_post_event(event);
 331         return event;
 332 }
 333
 334 /**
 335  * i40iw_free_retrans_entry - free send entry
 336  * @cm_node: connection's node
 337  */
 338 static void i40iw_free_retrans_entry(struct i40iw_cm_node *cm_node)
 339 {
 340         struct i40iw_device *iwdev = cm_node->iwdev;
 341         struct i40iw_timer_entry *send_entry;
 342
 343         send_entry = cm_node->send_entry;
 344         if (send_entry) {
 345                 cm_node->send_entry = NULL;
 346                 i40iw_free_sqbuf(&iwdev->vsi, (void *)send_entry->sqbuf);
 347                 kfree(send_entry);
 348                 atomic_dec(&cm_node->ref_count);
 349         }
 350 }
 351
 352 /**
 353  * i40iw_cleanup_retrans_entry - free send entry with lock
 354  * @cm_node: connection's node
 355  */
 356 static void i40iw_cleanup_retrans_entry(struct i40iw_cm_node *cm_node)
 357 {
 358         unsigned long flags;
 359
 360         spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
 361         i40iw_free_retrans_entry(cm_node);
 362         spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
 363 }
 364
 365 /**
 366  * i40iw_form_cm_frame - get a free packet and build frame
 367  * @cm_node: connection's node ionfo to use in frame
 368  * @options: pointer to options info
 369  * @hdr: pointer mpa header
 370  * @pdata: pointer to private data
 371  * @flags:  indicates FIN or ACK
 372  */
 373 static struct i40iw_puda_buf *i40iw_form_cm_frame(struct i40iw_cm_node *cm_node,
 374                                                   struct i40iw_kmem_info *options,
 375                                                   struct i40iw_kmem_info *hdr,
 376                                                   struct i40iw_kmem_info *pdata,
 377                                                   u8 flags)
 378 {
 379         struct i40iw_puda_buf *sqbuf;
 380         struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi;
 381         u8 *buf;
 382
 383         struct tcphdr *tcph;
 384         struct iphdr *iph;
 385         struct ipv6hdr *ip6h;
 386         struct ethhdr *ethh;
 387         u16 packetsize;
 388         u16 eth_hlen = ETH_HLEN;
 389         u32 opts_len = 0;
 390         u32 pd_len = 0;
 391         u32 hdr_len = 0;
 392         u16 vtag;
 393
 394         sqbuf = i40iw_puda_get_bufpool(vsi->ilq);
 395         if (!sqbuf)
 396                 return NULL;
 397         buf = sqbuf->mem.va;
 398
 399         if (options)
 400                 opts_len = (u32)options->size;
 401
 402         if (hdr)
 403                 hdr_len = hdr->size;
 404
 405         if (pdata)
 406                 pd_len = pdata->size;
 407
 408         if (cm_node->vlan_id < VLAN_TAG_PRESENT)
 409                 eth_hlen += 4;
 410
 411         if (cm_node->ipv4)
 412                 packetsize = sizeof(*iph) + sizeof(*tcph);
 413         else
 414                 packetsize = sizeof(*ip6h) + sizeof(*tcph);
 415         packetsize += opts_len + hdr_len + pd_len;
 416
 417         memset(buf, 0x00, eth_hlen + packetsize);
 418
 419         sqbuf->totallen = packetsize + eth_hlen;
 420         sqbuf->maclen = eth_hlen;
 421         sqbuf->tcphlen = sizeof(*tcph) + opts_len;
 422         sqbuf->scratch = (void *)cm_node;
 423
 424         ethh = (struct ethhdr *)buf;
 425         buf += eth_hlen;
 426
 427         if (cm_node->ipv4) {
 428                 sqbuf->ipv4 = true;
 429
 430                 iph = (struct iphdr *)buf;
 431                 buf += sizeof(*iph);
 432                 tcph = (struct tcphdr *)buf;
 433                 buf += sizeof(*tcph);
 434
 435                 ether_addr_copy(ethh->h_dest, cm_node->rem_mac);
 436                 ether_addr_copy(ethh->h_source, cm_node->loc_mac);
 437                 if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
 438                         ((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q);
 439                         vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) | cm_node->vlan_id;
 440                         ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(vtag);
 441
 442                         ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IP);
 443                 } else {
 444                         ethh->h_proto = htons(ETH_P_IP);
 445                 }
 446
 447                 iph->version = IPVERSION;
 448                 iph->ihl = 5;   /* 5 * 4Byte words, IP headr len */
 449                 iph->tos = cm_node->tos;
 450                 iph->tot_len = htons(packetsize);
 451                 iph->id = htons(++cm_node->tcp_cntxt.loc_id);
 452
 453                 iph->frag_off = htons(0x4000);
 454                 iph->ttl = 0x40;
 455                 iph->protocol = IPPROTO_TCP;
 456                 iph->saddr = htonl(cm_node->loc_addr[0]);
 457                 iph->daddr = htonl(cm_node->rem_addr[0]);
 458         } else {
 459                 sqbuf->ipv4 = false;
 460                 ip6h = (struct ipv6hdr *)buf;
 461                 buf += sizeof(*ip6h);
 462                 tcph = (struct tcphdr *)buf;
 463                 buf += sizeof(*tcph);
 464
 465                 ether_addr_copy(ethh->h_dest, cm_node->rem_mac);
 466                 ether_addr_copy(ethh->h_source, cm_node->loc_mac);
 467                 if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
 468                         ((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q);
 469                         vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) | cm_node->vlan_id;
 470                         ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(vtag);
 471                         ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IPV6);
 472                 } else {
 473                         ethh->h_proto = htons(ETH_P_IPV6);
 474                 }
 475                 ip6h->version = 6;
 476                 ip6h->priority = cm_node->tos >> 4;
 477                 ip6h->flow_lbl[0] = cm_node->tos << 4;
 478                 ip6h->flow_lbl[1] = 0;
 479                 ip6h->flow_lbl[2] = 0;
 480                 ip6h->payload_len = htons(packetsize - sizeof(*ip6h));
 481                 ip6h->nexthdr = 6;
 482                 ip6h->hop_limit = 128;
 483                 i40iw_copy_ip_htonl(ip6h->saddr.in6_u.u6_addr32,
 484                                     cm_node->loc_addr);
 485                 i40iw_copy_ip_htonl(ip6h->daddr.in6_u.u6_addr32,
 486                                     cm_node->rem_addr);
 487         }
 488
 489         tcph->source = htons(cm_node->loc_port);
 490         tcph->dest = htons(cm_node->rem_port);
 491
 492         tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
 493
 494         if (flags & SET_ACK) {
 495                 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
 496                 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
 497                 tcph->ack = 1;
 498         } else {
 499                 tcph->ack_seq = 0;
 500         }
 501
 502         if (flags & SET_SYN) {
 503                 cm_node->tcp_cntxt.loc_seq_num++;
 504                 tcph->syn = 1;
 505         } else {
 506                 cm_node->tcp_cntxt.loc_seq_num += hdr_len + pd_len;
 507         }
 508
 509         if (flags & SET_FIN) {
 510                 cm_node->tcp_cntxt.loc_seq_num++;
 511                 tcph->fin = 1;
 512         }
 513
 514         if (flags & SET_RST)
 515                 tcph->rst = 1;
 516
 517         tcph->doff = (u16)((sizeof(*tcph) + opts_len + 3) >> 2);
 518         sqbuf->tcphlen = tcph->doff << 2;
 519         tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
 520         tcph->urg_ptr = 0;
 521
 522         if (opts_len) {
 523                 memcpy(buf, options->addr, opts_len);
 524                 buf += opts_len;
 525         }
 526
 527         if (hdr_len) {
 528                 memcpy(buf, hdr->addr, hdr_len);
 529                 buf += hdr_len;
 530         }
 531
 532         if (pdata && pdata->addr)
 533                 memcpy(buf, pdata->addr, pdata->size);
 534
 535         atomic_set(&sqbuf->refcount, 1);
 536
 537         return sqbuf;
 538 }
 539
 540 /**
 541  * i40iw_send_reset - Send RST packet
 542  * @cm_node: connection's node
 543  */
 544 static int i40iw_send_reset(struct i40iw_cm_node *cm_node)
 545 {
 546         struct i40iw_puda_buf *sqbuf;
 547         int flags = SET_RST | SET_ACK;
 548
 549         sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, flags);
 550         if (!sqbuf) {
 551                 i40iw_pr_err("no sqbuf\n");
 552                 return -1;
 553         }
 554
 555         return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 0, 1);
 556 }
 557
 558 /**
 559  * i40iw_active_open_err - send event for active side cm error
 560  * @cm_node: connection's node
 561  * @reset: Flag to send reset or not
 562  */
 563 static void i40iw_active_open_err(struct i40iw_cm_node *cm_node, bool reset)
 564 {
 565         i40iw_cleanup_retrans_entry(cm_node);
 566         cm_node->cm_core->stats_connect_errs++;
 567         if (reset) {
 568                 i40iw_debug(cm_node->dev,
 569                             I40IW_DEBUG_CM,
 570                             "%s cm_node=%p state=%d\n",
 571                             __func__,
 572                             cm_node,
 573                             cm_node->state);
 574                 atomic_inc(&cm_node->ref_count);
 575                 i40iw_send_reset(cm_node);
 576         }
 577
 578         cm_node->state = I40IW_CM_STATE_CLOSED;
 579         i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
 580 }
 581
 582 /**
 583  * i40iw_passive_open_err - handle passive side cm error
 584  * @cm_node: connection's node
 585  * @reset: send reset or just free cm_node
 586  */
 587 static void i40iw_passive_open_err(struct i40iw_cm_node *cm_node, bool reset)
 588 {
 589         i40iw_cleanup_retrans_entry(cm_node);
 590         cm_node->cm_core->stats_passive_errs++;
 591         cm_node->state = I40IW_CM_STATE_CLOSED;
 592         i40iw_debug(cm_node->dev,
 593                     I40IW_DEBUG_CM,
 594                     "%s cm_node=%p state =%d\n",
 595                     __func__,
 596                     cm_node,
 597                     cm_node->state);
 598         if (reset)
 599                 i40iw_send_reset(cm_node);
 600         else
 601                 i40iw_rem_ref_cm_node(cm_node);
 602 }
 603
 604 /**
 605  * i40iw_event_connect_error - to create connect error event
 606  * @event: cm information for connect event
 607  */
 608 static void i40iw_event_connect_error(struct i40iw_cm_event *event)
 609 {
 610         struct i40iw_qp *iwqp;
 611         struct iw_cm_id *cm_id;
 612
 613         cm_id = event->cm_node->cm_id;
 614         if (!cm_id)
 615                 return;
 616
 617         iwqp = cm_id->provider_data;
 618
 619         if (!iwqp || !iwqp->iwdev)
 620                 return;
 621
 622         iwqp->cm_id = NULL;
 623         cm_id->provider_data = NULL;
 624         i40iw_send_cm_event(event->cm_node, cm_id,
 625                             IW_CM_EVENT_CONNECT_REPLY,
 626                             -ECONNRESET);
 627         cm_id->rem_ref(cm_id);
 628         i40iw_rem_ref_cm_node(event->cm_node);
 629 }
 630
 631 /**
 632  * i40iw_process_options
 633  * @cm_node: connection's node
 634  * @optionsloc: point to start of options
 635  * @optionsize: size of all options
 636  * @syn_packet: flag if syn packet
 637  */
 638 static int i40iw_process_options(struct i40iw_cm_node *cm_node,
 639                                  u8 *optionsloc,
 640                                  u32 optionsize,
 641                                  u32 syn_packet)
 642 {
 643         u32 tmp;
 644         u32 offset = 0;
 645         union all_known_options *all_options;
 646         char got_mss_option = 0;
 647
 648         while (offset < optionsize) {
 649                 all_options = (union all_known_options *)(optionsloc + offset);
 650                 switch (all_options->as_base.optionnum) {
 651                 case OPTION_NUMBER_END:
 652                         offset = optionsize;
 653                         break;
 654                 case OPTION_NUMBER_NONE:
 655                         offset += 1;
 656                         continue;
 657                 case OPTION_NUMBER_MSS:
 658                         i40iw_debug(cm_node->dev,
 659                                     I40IW_DEBUG_CM,
 660                                     "%s: MSS Length: %d Offset: %d Size: %d\n",
 661                                     __func__,
 662                                     all_options->as_mss.length,
 663                                     offset,
 664                                     optionsize);
 665                         got_mss_option = 1;
 666                         if (all_options->as_mss.length != 4)
 667                                 return -1;
 668                         tmp = ntohs(all_options->as_mss.mss);
 669                         if (tmp > 0 && tmp < cm_node->tcp_cntxt.mss)
 670                                 cm_node->tcp_cntxt.mss = tmp;
 671                         break;
 672                 case OPTION_NUMBER_WINDOW_SCALE:
 673                         cm_node->tcp_cntxt.snd_wscale =
 674                             all_options->as_windowscale.shiftcount;
 675                         break;
 676                 default:
 677                         i40iw_debug(cm_node->dev,
 678                                     I40IW_DEBUG_CM,
 679                                     "TCP Option not understood: %x\n",
 680                                     all_options->as_base.optionnum);
 681                         break;
 682                 }
 683                 offset += all_options->as_base.length;
 684         }
 685         if (!got_mss_option && syn_packet)
 686                 cm_node->tcp_cntxt.mss = I40IW_CM_DEFAULT_MSS;
 687         return 0;
 688 }
 689
 690 /**
 691  * i40iw_handle_tcp_options -
 692  * @cm_node: connection's node
 693  * @tcph: pointer tcp header
 694  * @optionsize: size of options rcvd
 695  * @passive: active or passive flag
 696  */
 697 static int i40iw_handle_tcp_options(struct i40iw_cm_node *cm_node,
 698                                     struct tcphdr *tcph,
 699                                     int optionsize,
 700                                     int passive)
 701 {
 702         u8 *optionsloc = (u8 *)&tcph[1];
 703
 704         if (optionsize) {
 705                 if (i40iw_process_options(cm_node,
 706                                           optionsloc,
 707                                           optionsize,
 708                                           (u32)tcph->syn)) {
 709                         i40iw_debug(cm_node->dev,
 710                                     I40IW_DEBUG_CM,
 711                                     "%s: Node %p, Sending RESET\n",
 712                                     __func__,
 713                                     cm_node);
 714                         if (passive)
 715                                 i40iw_passive_open_err(cm_node, true);
 716                         else
 717                                 i40iw_active_open_err(cm_node, true);
 718                         return -1;
 719                 }
 720         }
 721
 722         cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
 723             cm_node->tcp_cntxt.snd_wscale;
 724
 725         if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
 726                 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
 727         return 0;
 728 }
 729
 730 /**
 731  * i40iw_build_mpa_v1 - build a MPA V1 frame
 732  * @cm_node: connection's node
 733  * @mpa_key: to do read0 or write0
 734  */
 735 static void i40iw_build_mpa_v1(struct i40iw_cm_node *cm_node,
 736                                void *start_addr,
 737                                u8 mpa_key)
 738 {
 739         struct ietf_mpa_v1 *mpa_frame = (struct ietf_mpa_v1 *)start_addr;
 740
 741         switch (mpa_key) {
 742         case MPA_KEY_REQUEST:
 743                 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
 744                 break;
 745         case MPA_KEY_REPLY:
 746                 memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
 747                 break;
 748         default:
 749                 break;
 750         }
 751         mpa_frame->flags = IETF_MPA_FLAGS_CRC;
 752         mpa_frame->rev = cm_node->mpa_frame_rev;
 753         mpa_frame->priv_data_len = htons(cm_node->pdata.size);
 754 }
 755
 756 /**
 757  * i40iw_build_mpa_v2 - build a MPA V2 frame
 758  * @cm_node: connection's node
 759  * @start_addr: buffer start address
 760  * @mpa_key: to do read0 or write0
 761  */
 762 static void i40iw_build_mpa_v2(struct i40iw_cm_node *cm_node,
 763                                void *start_addr,
 764                                u8 mpa_key)
 765 {
 766         struct ietf_mpa_v2 *mpa_frame = (struct ietf_mpa_v2 *)start_addr;
 767         struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg;
 768         u16 ctrl_ird, ctrl_ord;
 769
 770         /* initialize the upper 5 bytes of the frame */
 771         i40iw_build_mpa_v1(cm_node, start_addr, mpa_key);
 772         mpa_frame->flags |= IETF_MPA_V2_FLAG;
 773         mpa_frame->priv_data_len += htons(IETF_RTR_MSG_SIZE);
 774
 775         /* initialize RTR msg */
 776         if (cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) {
 777                 ctrl_ird = IETF_NO_IRD_ORD;
 778                 ctrl_ord = IETF_NO_IRD_ORD;
 779         } else {
 780                 ctrl_ird = (cm_node->ird_size > IETF_NO_IRD_ORD) ?
 781                         IETF_NO_IRD_ORD : cm_node->ird_size;
 782                 ctrl_ord = (cm_node->ord_size > IETF_NO_IRD_ORD) ?
 783                         IETF_NO_IRD_ORD : cm_node->ord_size;
 784         }
 785
 786         ctrl_ird |= IETF_PEER_TO_PEER;
 787
 788         switch (mpa_key) {
 789         case MPA_KEY_REQUEST:
 790                 ctrl_ord |= IETF_RDMA0_WRITE;
 791                 ctrl_ord |= IETF_RDMA0_READ;
 792                 break;
 793         case MPA_KEY_REPLY:
 794                 switch (cm_node->send_rdma0_op) {
 795                 case SEND_RDMA_WRITE_ZERO:
 796                         ctrl_ord |= IETF_RDMA0_WRITE;
 797                         break;
 798                 case SEND_RDMA_READ_ZERO:
 799                         ctrl_ord |= IETF_RDMA0_READ;
 800                         break;
 801                 }
 802                 break;
 803         default:
 804                 break;
 805         }
 806         rtr_msg->ctrl_ird = htons(ctrl_ird);
 807         rtr_msg->ctrl_ord = htons(ctrl_ord);
 808 }
 809
 810 /**
 811  * i40iw_cm_build_mpa_frame - build mpa frame for mpa version 1 or version 2
 812  * @cm_node: connection's node
 813  * @mpa: mpa: data buffer
 814  * @mpa_key: to do read0 or write0
 815  */
 816 static int i40iw_cm_build_mpa_frame(struct i40iw_cm_node *cm_node,
 817                                     struct i40iw_kmem_info *mpa,
 818                                     u8 mpa_key)
 819 {
 820         int hdr_len = 0;
 821
 822         switch (cm_node->mpa_frame_rev) {
 823         case IETF_MPA_V1:
 824                 hdr_len = sizeof(struct ietf_mpa_v1);
 825                 i40iw_build_mpa_v1(cm_node, mpa->addr, mpa_key);
 826                 break;
 827         case IETF_MPA_V2:
 828                 hdr_len = sizeof(struct ietf_mpa_v2);
 829                 i40iw_build_mpa_v2(cm_node, mpa->addr, mpa_key);
 830                 break;
 831         default:
 832                 break;
 833         }
 834
 835         return hdr_len;
 836 }
 837
 838 /**
 839  * i40iw_send_mpa_request - active node send mpa request to passive node
 840  * @cm_node: connection's node
 841  */
 842 static int i40iw_send_mpa_request(struct i40iw_cm_node *cm_node)
 843 {
 844         struct i40iw_puda_buf *sqbuf;
 845
 846         if (!cm_node) {
 847                 i40iw_pr_err("cm_node == NULL\n");
 848                 return -1;
 849         }
 850
 851         cm_node->mpa_hdr.addr = &cm_node->mpa_frame;
 852         cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node,
 853                                                          &cm_node->mpa_hdr,
 854                                                          MPA_KEY_REQUEST);
 855         if (!cm_node->mpa_hdr.size) {
 856                 i40iw_pr_err("mpa size = %d\n", cm_node->mpa_hdr.size);
 857                 return -1;
 858         }
 859
 860         sqbuf = i40iw_form_cm_frame(cm_node,
 861                                     NULL,
 862                                     &cm_node->mpa_hdr,
 863                                     &cm_node->pdata,
 864                                     SET_ACK);
 865         if (!sqbuf) {
 866                 i40iw_pr_err("sq_buf == NULL\n");
 867                 return -1;
 868         }
 869         return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
 870 }
 871
 872 /**
 873  * i40iw_send_mpa_reject -
 874  * @cm_node: connection's node
 875  * @pdata: reject data for connection
 876  * @plen: length of reject data
 877  */
 878 static int i40iw_send_mpa_reject(struct i40iw_cm_node *cm_node,
 879                                  const void *pdata,
 880                                  u8 plen)
 881 {
 882         struct i40iw_puda_buf *sqbuf;
 883         struct i40iw_kmem_info priv_info;
 884
 885         cm_node->mpa_hdr.addr = &cm_node->mpa_frame;
 886         cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node,
 887                                                          &cm_node->mpa_hdr,
 888                                                          MPA_KEY_REPLY);
 889
 890         cm_node->mpa_frame.flags |= IETF_MPA_FLAGS_REJECT;
 891         priv_info.addr = (void *)pdata;
 892         priv_info.size = plen;
 893
 894         sqbuf = i40iw_form_cm_frame(cm_node,
 895                                     NULL,
 896                                     &cm_node->mpa_hdr,
 897                                     &priv_info,
 898                                     SET_ACK | SET_FIN);
 899         if (!sqbuf) {
 900                 i40iw_pr_err("no sqbuf\n");
 901                 return -ENOMEM;
 902         }
 903         cm_node->state = I40IW_CM_STATE_FIN_WAIT1;
 904         return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
 905 }
 906
 907 /**
 908  * recv_mpa - process an IETF MPA frame
 909  * @cm_node: connection's node
 910  * @buffer: Data pointer
 911  * @type: to return accept or reject
 912  * @len: Len of mpa buffer
 913  */
 914 static int i40iw_parse_mpa(struct i40iw_cm_node *cm_node, u8 *buffer, u32 *type, u32 len)
 915 {
 916         struct ietf_mpa_v1 *mpa_frame;
 917         struct ietf_mpa_v2 *mpa_v2_frame;
 918         struct ietf_rtr_msg *rtr_msg;
 919         int mpa_hdr_len;
 920         int priv_data_len;
 921
 922         *type = I40IW_MPA_REQUEST_ACCEPT;
 923
 924         if (len < sizeof(struct ietf_mpa_v1)) {
 925                 i40iw_pr_err("ietf buffer small (%x)\n", len);
 926                 return -1;
 927         }
 928
 929         mpa_frame = (struct ietf_mpa_v1 *)buffer;
 930         mpa_hdr_len = sizeof(struct ietf_mpa_v1);
 931         priv_data_len = ntohs(mpa_frame->priv_data_len);
 932
 933         if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) {
 934                 i40iw_pr_err("large pri_data %d\n", priv_data_len);
 935                 return -1;
 936         }
 937         if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) {
 938                 i40iw_pr_err("unsupported mpa rev = %d\n", mpa_frame->rev);
 939                 return -1;
 940         }
 941         if (mpa_frame->rev > cm_node->mpa_frame_rev) {
 942                 i40iw_pr_err("rev %d\n", mpa_frame->rev);
 943                 return -1;
 944         }
 945         cm_node->mpa_frame_rev = mpa_frame->rev;
 946
 947         if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) {
 948                 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) {
 949                         i40iw_pr_err("Unexpected MPA Key received\n");
 950                         return -1;
 951                 }
 952         } else {
 953                 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) {
 954                         i40iw_pr_err("Unexpected MPA Key received\n");
 955                         return -1;
 956                 }
 957         }
 958
 959         if (priv_data_len + mpa_hdr_len > len) {
 960                 i40iw_pr_err("ietf buffer len(%x + %x != %x)\n",
 961                              priv_data_len, mpa_hdr_len, len);
 962                 return -1;
 963         }
 964         if (len > MAX_CM_BUFFER) {
 965                 i40iw_pr_err("ietf buffer large len = %d\n", len);
 966                 return -1;
 967         }
 968
 969         switch (mpa_frame->rev) {
 970         case IETF_MPA_V2:{
 971                         u16 ird_size;
 972                         u16 ord_size;
 973                         u16 ctrl_ord;
 974                         u16 ctrl_ird;
 975
 976                         mpa_v2_frame = (struct ietf_mpa_v2 *)buffer;
 977                         mpa_hdr_len += IETF_RTR_MSG_SIZE;
 978                         rtr_msg = &mpa_v2_frame->rtr_msg;
 979
 980                         /* parse rtr message */
 981                         ctrl_ord = ntohs(rtr_msg->ctrl_ord);
 982                         ctrl_ird = ntohs(rtr_msg->ctrl_ird);
 983                         ird_size = ctrl_ird & IETF_NO_IRD_ORD;
 984                         ord_size = ctrl_ord & IETF_NO_IRD_ORD;
 985
 986                         if (!(ctrl_ird & IETF_PEER_TO_PEER))
 987                                 return -1;
 988
 989                         if (ird_size == IETF_NO_IRD_ORD || ord_size == IETF_NO_IRD_ORD) {
 990                                 cm_node->mpav2_ird_ord = IETF_NO_IRD_ORD;
 991                                 goto negotiate_done;
 992                         }
 993
 994                         if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) {
 995                                 /* responder */
 996                                 if (!ord_size && (ctrl_ord & IETF_RDMA0_READ))
 997                                         cm_node->ird_size = 1;
 998                                 if (cm_node->ord_size > ird_size)
 999                                         cm_node->ord_size = ird_size;
1000                         } else {
1001                                 /* initiator */
1002                                 if (!ird_size && (ctrl_ord & IETF_RDMA0_READ))
1003                                         return -1;
1004                                 if (cm_node->ord_size > ird_size)
1005                                         cm_node->ord_size = ird_size;
1006
1007                                 if (cm_node->ird_size < ord_size)
1008                                         /* no resources available */
1009                                         return -1;
1010                         }
1011
1012 negotiate_done:
1013                         if (ctrl_ord & IETF_RDMA0_READ)
1014                                 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
1015                         else if (ctrl_ord & IETF_RDMA0_WRITE)
1016                                 cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO;
1017                         else    /* Not supported RDMA0 operation */
1018                                 return -1;
1019                         i40iw_debug(cm_node->dev, I40IW_DEBUG_CM,
1020                                     "MPAV2: Negotiated ORD: %d, IRD: %d\n",
1021                                     cm_node->ord_size, cm_node->ird_size);
1022                         break;
1023                 }
1024                 break;
1025         case IETF_MPA_V1:
1026         default:
1027                 break;
1028         }
1029
1030         memcpy(cm_node->pdata_buf, buffer + mpa_hdr_len, priv_data_len);
1031         cm_node->pdata.size = priv_data_len;
1032
1033         if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT)
1034                 *type = I40IW_MPA_REQUEST_REJECT;
1035
1036         if (mpa_frame->flags & IETF_MPA_FLAGS_MARKERS)
1037                 cm_node->snd_mark_en = true;
1038
1039         return 0;
1040 }
1041
1042 /**
1043  * i40iw_schedule_cm_timer
1044  * @@cm_node: connection's node
1045  * @sqbuf: buffer to send
1046  * @type: if it es send ot close
1047  * @send_retrans: if rexmits to be done
1048  * @close_when_complete: is cm_node to be removed
1049  *
1050  * note - cm_node needs to be protected before calling this. Encase in:
1051  *              i40iw_rem_ref_cm_node(cm_core, cm_node);
1052  *              i40iw_schedule_cm_timer(...)
1053  *              atomic_inc(&cm_node->ref_count);
1054  */
1055 int i40iw_schedule_cm_timer(struct i40iw_cm_node *cm_node,
1056                             struct i40iw_puda_buf *sqbuf,
1057                             enum i40iw_timer_type type,
1058                             int send_retrans,
1059                             int close_when_complete)
1060 {
1061         struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi;
1062         struct i40iw_cm_core *cm_core = cm_node->cm_core;
1063         struct i40iw_timer_entry *new_send;
1064         int ret = 0;
1065         u32 was_timer_set;
1066         unsigned long flags;
1067
1068         new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
1069         if (!new_send) {
1070                 i40iw_free_sqbuf(vsi, (void *)sqbuf);
1071                 return -ENOMEM;
1072         }
1073         new_send->retrycount = I40IW_DEFAULT_RETRYS;
1074         new_send->retranscount = I40IW_DEFAULT_RETRANS;
1075         new_send->sqbuf = sqbuf;
1076         new_send->timetosend = jiffies;
1077         new_send->type = type;
1078         new_send->send_retrans = send_retrans;
1079         new_send->close_when_complete = close_when_complete;
1080
1081         if (type == I40IW_TIMER_TYPE_CLOSE) {
1082                 new_send->timetosend += (HZ / 10);
1083                 if (cm_node->close_entry) {
1084                         kfree(new_send);
1085                         i40iw_free_sqbuf(vsi, (void *)sqbuf);
1086                         i40iw_pr_err("already close entry\n");
1087                         return -EINVAL;
1088                 }
1089                 cm_node->close_entry = new_send;
1090         }
1091
1092         if (type == I40IW_TIMER_TYPE_SEND) {
1093                 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1094                 cm_node->send_entry = new_send;
1095                 atomic_inc(&cm_node->ref_count);
1096                 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1097                 new_send->timetosend = jiffies + I40IW_RETRY_TIMEOUT;
1098
1099                 atomic_inc(&sqbuf->refcount);
1100                 i40iw_puda_send_buf(vsi->ilq, sqbuf);
1101                 if (!send_retrans) {
1102                         i40iw_cleanup_retrans_entry(cm_node);
1103                         if (close_when_complete)
1104                                 i40iw_rem_ref_cm_node(cm_node);
1105                         return ret;
1106                 }
1107         }
1108
1109         spin_lock_irqsave(&cm_core->ht_lock, flags);
1110         was_timer_set = timer_pending(&cm_core->tcp_timer);
1111
1112         if (!was_timer_set) {
1113                 cm_core->tcp_timer.expires = new_send->timetosend;
1114                 add_timer(&cm_core->tcp_timer);
1115         }
1116         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1117
1118         return ret;
1119 }
1120
1121 /**
1122  * i40iw_retrans_expired - Could not rexmit the packet
1123  * @cm_node: connection's node
1124  */
1125 static void i40iw_retrans_expired(struct i40iw_cm_node *cm_node)
1126 {
1127         struct iw_cm_id *cm_id = cm_node->cm_id;
1128         enum i40iw_cm_node_state state = cm_node->state;
1129
1130         cm_node->state = I40IW_CM_STATE_CLOSED;
1131         switch (state) {
1132         case I40IW_CM_STATE_SYN_RCVD:
1133         case I40IW_CM_STATE_CLOSING:
1134                 i40iw_rem_ref_cm_node(cm_node);
1135                 break;
1136         case I40IW_CM_STATE_FIN_WAIT1:
1137         case I40IW_CM_STATE_LAST_ACK:
1138                 if (cm_node->cm_id)
1139                         cm_id->rem_ref(cm_id);
1140                 i40iw_send_reset(cm_node);
1141                 break;
1142         default:
1143                 atomic_inc(&cm_node->ref_count);
1144                 i40iw_send_reset(cm_node);
1145                 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
1146                 break;
1147         }
1148 }
1149
1150 /**
1151  * i40iw_handle_close_entry - for handling retry/timeouts
1152  * @cm_node: connection's node
1153  * @rem_node: flag for remove cm_node
1154  */
1155 static void i40iw_handle_close_entry(struct i40iw_cm_node *cm_node, u32 rem_node)
1156 {
1157         struct i40iw_timer_entry *close_entry = cm_node->close_entry;
1158         struct iw_cm_id *cm_id = cm_node->cm_id;
1159         struct i40iw_qp *iwqp;
1160         unsigned long flags;
1161
1162         if (!close_entry)
1163                 return;
1164         iwqp = (struct i40iw_qp *)close_entry->sqbuf;
1165         if (iwqp) {
1166                 spin_lock_irqsave(&iwqp->lock, flags);
1167                 if (iwqp->cm_id) {
1168                         iwqp->hw_tcp_state = I40IW_TCP_STATE_CLOSED;
1169                         iwqp->hw_iwarp_state = I40IW_QP_STATE_ERROR;
1170                         iwqp->last_aeq = I40IW_AE_RESET_SENT;
1171                         iwqp->ibqp_state = IB_QPS_ERR;
1172                         spin_unlock_irqrestore(&iwqp->lock, flags);
1173                         i40iw_cm_disconn(iwqp);
1174                 } else {
1175                         spin_unlock_irqrestore(&iwqp->lock, flags);
1176                 }
1177         } else if (rem_node) {
1178                 /* TIME_WAIT state */
1179                 i40iw_rem_ref_cm_node(cm_node);
1180         }
1181         if (cm_id)
1182                 cm_id->rem_ref(cm_id);
1183         kfree(close_entry);
1184         cm_node->close_entry = NULL;
1185 }
1186
1187 /**
1188  * i40iw_cm_timer_tick - system's timer expired callback
1189  * @pass: Pointing to cm_core
1190  */
1191 static void i40iw_cm_timer_tick(unsigned long pass)
1192 {
1193         unsigned long nexttimeout = jiffies + I40IW_LONG_TIME;
1194         struct i40iw_cm_node *cm_node;
1195         struct i40iw_timer_entry *send_entry, *close_entry;
1196         struct list_head *list_core_temp;
1197         struct i40iw_sc_vsi *vsi;
1198         struct list_head *list_node;
1199         struct i40iw_cm_core *cm_core = (struct i40iw_cm_core *)pass;
1200         u32 settimer = 0;
1201         unsigned long timetosend;
1202         struct i40iw_sc_dev *dev;
1203         unsigned long flags;
1204
1205         struct list_head timer_list;
1206
1207         INIT_LIST_HEAD(&timer_list);
1208         spin_lock_irqsave(&cm_core->ht_lock, flags);
1209
1210         list_for_each_safe(list_node, list_core_temp, &cm_core->connected_nodes) {
1211                 cm_node = container_of(list_node, struct i40iw_cm_node, list);
1212                 if (cm_node->close_entry || cm_node->send_entry) {
1213                         atomic_inc(&cm_node->ref_count);
1214                         list_add(&cm_node->timer_entry, &timer_list);
1215                 }
1216         }
1217         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1218
1219         list_for_each_safe(list_node, list_core_temp, &timer_list) {
1220                 cm_node = container_of(list_node,
1221                                        struct i40iw_cm_node,
1222                                        timer_entry);
1223                 close_entry = cm_node->close_entry;
1224
1225                 if (close_entry) {
1226                         if (time_after(close_entry->timetosend, jiffies)) {
1227                                 if (nexttimeout > close_entry->timetosend ||
1228                                     !settimer) {
1229                                         nexttimeout = close_entry->timetosend;
1230                                         settimer = 1;
1231                                 }
1232                         } else {
1233                                 i40iw_handle_close_entry(cm_node, 1);
1234                         }
1235                 }
1236
1237                 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1238
1239                 send_entry = cm_node->send_entry;
1240                 if (!send_entry)
1241                         goto done;
1242                 if (time_after(send_entry->timetosend, jiffies)) {
1243                         if (cm_node->state != I40IW_CM_STATE_OFFLOADED) {
1244                                 if ((nexttimeout > send_entry->timetosend) ||
1245                                     !settimer) {
1246                                         nexttimeout = send_entry->timetosend;
1247                                         settimer = 1;
1248                                 }
1249                         } else {
1250                                 i40iw_free_retrans_entry(cm_node);
1251                         }
1252                         goto done;
1253                 }
1254
1255                 if ((cm_node->state == I40IW_CM_STATE_OFFLOADED) ||
1256                     (cm_node->state == I40IW_CM_STATE_CLOSED)) {
1257                         i40iw_free_retrans_entry(cm_node);
1258                         goto done;
1259                 }
1260
1261                 if (!send_entry->retranscount || !send_entry->retrycount) {
1262                         i40iw_free_retrans_entry(cm_node);
1263
1264                         spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1265                         i40iw_retrans_expired(cm_node);
1266                         cm_node->state = I40IW_CM_STATE_CLOSED;
1267                         spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1268                         goto done;
1269                 }
1270                 cm_node->cm_core->stats_pkt_retrans++;
1271                 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1272
1273                 vsi = &cm_node->iwdev->vsi;
1274                 dev = cm_node->dev;
1275                 atomic_inc(&send_entry->sqbuf->refcount);
1276                 i40iw_puda_send_buf(vsi->ilq, send_entry->sqbuf);
1277                 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1278                 if (send_entry->send_retrans) {
1279                         send_entry->retranscount--;
1280                         timetosend = (I40IW_RETRY_TIMEOUT <<
1281                                       (I40IW_DEFAULT_RETRANS -
1282                                        send_entry->retranscount));
1283
1284                         send_entry->timetosend = jiffies +
1285                             min(timetosend, I40IW_MAX_TIMEOUT);
1286                         if (nexttimeout > send_entry->timetosend || !settimer) {
1287                                 nexttimeout = send_entry->timetosend;
1288                                 settimer = 1;
1289                         }
1290                 } else {
1291                         int close_when_complete;
1292
1293                         close_when_complete = send_entry->close_when_complete;
1294                         i40iw_debug(cm_node->dev,
1295                                     I40IW_DEBUG_CM,
1296                                     "cm_node=%p state=%d\n",
1297                                     cm_node,
1298                                     cm_node->state);
1299                         i40iw_free_retrans_entry(cm_node);
1300                         if (close_when_complete)
1301                                 i40iw_rem_ref_cm_node(cm_node);
1302                 }
1303 done:
1304                 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1305                 i40iw_rem_ref_cm_node(cm_node);
1306         }
1307
1308         if (settimer) {
1309                 spin_lock_irqsave(&cm_core->ht_lock, flags);
1310                 if (!timer_pending(&cm_core->tcp_timer)) {
1311                         cm_core->tcp_timer.expires = nexttimeout;
1312                         add_timer(&cm_core->tcp_timer);
1313                 }
1314                 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1315         }
1316 }
1317
1318 /**
1319  * i40iw_send_syn - send SYN packet
1320  * @cm_node: connection's node
1321  * @sendack: flag to set ACK bit or not
1322  */
1323 int i40iw_send_syn(struct i40iw_cm_node *cm_node, u32 sendack)
1324 {
1325         struct i40iw_puda_buf *sqbuf;
1326         int flags = SET_SYN;
1327         char optionsbuffer[sizeof(struct option_mss) +
1328                            sizeof(struct option_windowscale) +
1329                            sizeof(struct option_base) + TCP_OPTIONS_PADDING];
1330         struct i40iw_kmem_info opts;
1331
1332         int optionssize = 0;
1333         /* Sending MSS option */
1334         union all_known_options *options;
1335
1336         opts.addr = optionsbuffer;
1337         if (!cm_node) {
1338                 i40iw_pr_err("no cm_node\n");
1339                 return -EINVAL;
1340         }
1341
1342         options = (union all_known_options *)&optionsbuffer[optionssize];
1343         options->as_mss.optionnum = OPTION_NUMBER_MSS;
1344         options->as_mss.length = sizeof(struct option_mss);
1345         options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
1346         optionssize += sizeof(struct option_mss);
1347
1348         options = (union all_known_options *)&optionsbuffer[optionssize];
1349         options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
1350         options->as_windowscale.length = sizeof(struct option_windowscale);
1351         options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
1352         optionssize += sizeof(struct option_windowscale);
1353         options = (union all_known_options *)&optionsbuffer[optionssize];
1354         options->as_end = OPTION_NUMBER_END;
1355         optionssize += 1;
1356
1357         if (sendack)
1358                 flags |= SET_ACK;
1359
1360         opts.size = optionssize;
1361
1362         sqbuf = i40iw_form_cm_frame(cm_node, &opts, NULL, NULL, flags);
1363         if (!sqbuf) {
1364                 i40iw_pr_err("no sqbuf\n");
1365                 return -1;
1366         }
1367         return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
1368 }
1369
1370 /**
1371  * i40iw_send_ack - Send ACK packet
1372  * @cm_node: connection's node
1373  */
1374 static void i40iw_send_ack(struct i40iw_cm_node *cm_node)
1375 {
1376         struct i40iw_puda_buf *sqbuf;
1377         struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi;
1378
1379         sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK);
1380         if (sqbuf)
1381                 i40iw_puda_send_buf(vsi->ilq, sqbuf);
1382         else
1383                 i40iw_pr_err("no sqbuf\n");
1384 }
1385
1386 /**
1387  * i40iw_send_fin - Send FIN pkt
1388  * @cm_node: connection's node
1389  */
1390 static int i40iw_send_fin(struct i40iw_cm_node *cm_node)
1391 {
1392         struct i40iw_puda_buf *sqbuf;
1393
1394         sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK | SET_FIN);
1395         if (!sqbuf) {
1396                 i40iw_pr_err("no sqbuf\n");
1397                 return -1;
1398         }
1399         return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
1400 }
1401
1402 /**
1403  * i40iw_find_node - find a cm node that matches the reference cm node
1404  * @cm_core: cm's core
1405  * @rem_port: remote tcp port num
1406  * @rem_addr: remote ip addr
1407  * @loc_port: local tcp port num
1408  * @loc_addr: loc ip addr
1409  * @add_refcnt: flag to increment refcount of cm_node
1410  */
1411 struct i40iw_cm_node *i40iw_find_node(struct i40iw_cm_core *cm_core,
1412                                       u16 rem_port,
1413                                       u32 *rem_addr,
1414                                       u16 loc_port,
1415                                       u32 *loc_addr,
1416                                       bool add_refcnt)
1417 {
1418         struct list_head *hte;
1419         struct i40iw_cm_node *cm_node;
1420         unsigned long flags;
1421
1422         hte = &cm_core->connected_nodes;
1423
1424         /* walk list and find cm_node associated with this session ID */
1425         spin_lock_irqsave(&cm_core->ht_lock, flags);
1426         list_for_each_entry(cm_node, hte, list) {
1427                 if (!memcmp(cm_node->loc_addr, loc_addr, sizeof(cm_node->loc_addr)) &&
1428                     (cm_node->loc_port == loc_port) &&
1429                     !memcmp(cm_node->rem_addr, rem_addr, sizeof(cm_node->rem_addr)) &&
1430                     (cm_node->rem_port == rem_port)) {
1431                         if (add_refcnt)
1432                                 atomic_inc(&cm_node->ref_count);
1433                         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1434                         return cm_node;
1435                 }
1436         }
1437         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1438
1439         /* no owner node */
1440         return NULL;
1441 }
1442
1443 /**
1444  * i40iw_find_listener - find a cm node listening on this addr-port pair
1445  * @cm_core: cm's core
1446  * @dst_port: listener tcp port num
1447  * @dst_addr: listener ip addr
1448  * @listener_state: state to match with listen node's
1449  */
1450 static struct i40iw_cm_listener *i40iw_find_listener(
1451                                                      struct i40iw_cm_core *cm_core,
1452                                                      u32 *dst_addr,
1453                                                      u16 dst_port,
1454                                                      u16 vlan_id,
1455                                                      enum i40iw_cm_listener_state
1456                                                      listener_state)
1457 {
1458         struct i40iw_cm_listener *listen_node;
1459         static const u32 ip_zero[4] = { 0, 0, 0, 0 };
1460         u32 listen_addr[4];
1461         u16 listen_port;
1462         unsigned long flags;
1463
1464         /* walk list and find cm_node associated with this session ID */
1465         spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1466         list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
1467                 memcpy(listen_addr, listen_node->loc_addr, sizeof(listen_addr));
1468                 listen_port = listen_node->loc_port;
1469                 /* compare node pair, return node handle if a match */
1470                 if ((!memcmp(listen_addr, dst_addr, sizeof(listen_addr)) ||
1471                      !memcmp(listen_addr, ip_zero, sizeof(listen_addr))) &&
1472                      (listen_port == dst_port) &&
1473                      (listener_state & listen_node->listener_state)) {
1474                         atomic_inc(&listen_node->ref_count);
1475                         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1476                         return listen_node;
1477                 }
1478         }
1479         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1480         return NULL;
1481 }
1482
1483 /**
1484  * i40iw_add_hte_node - add a cm node to the hash table
1485  * @cm_core: cm's core
1486  * @cm_node: connection's node
1487  */
1488 static void i40iw_add_hte_node(struct i40iw_cm_core *cm_core,
1489                                struct i40iw_cm_node *cm_node)
1490 {
1491         struct list_head *hte;
1492         unsigned long flags;
1493
1494         if (!cm_node || !cm_core) {
1495                 i40iw_pr_err("cm_node or cm_core == NULL\n");
1496                 return;
1497         }
1498         spin_lock_irqsave(&cm_core->ht_lock, flags);
1499
1500         /* get a handle on the hash table element (list head for this slot) */
1501         hte = &cm_core->connected_nodes;
1502         list_add_tail(&cm_node->list, hte);
1503         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1504 }
1505
1506 /**
1507  * listen_port_in_use - determine if port is in use
1508  * @port: Listen port number
1509  */
1510 static bool i40iw_listen_port_in_use(struct i40iw_cm_core *cm_core, u16 port)
1511 {
1512         struct i40iw_cm_listener *listen_node;
1513         unsigned long flags;
1514         bool ret = false;
1515
1516         spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1517         list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
1518                 if (listen_node->loc_port == port) {
1519                         ret = true;
1520                         break;
1521                 }
1522         }
1523         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1524         return ret;
1525 }
1526
1527 /**
1528  * i40iw_del_multiple_qhash - Remove qhash and child listens
1529  * @iwdev: iWarp device
1530  * @cm_info: CM info for parent listen node
1531  * @cm_parent_listen_node: The parent listen node
1532  */
1533 static enum i40iw_status_code i40iw_del_multiple_qhash(
1534                                                        struct i40iw_device *iwdev,
1535                                                        struct i40iw_cm_info *cm_info,
1536                                                        struct i40iw_cm_listener *cm_parent_listen_node)
1537 {
1538         struct i40iw_cm_listener *child_listen_node;
1539         enum i40iw_status_code ret = I40IW_ERR_CONFIG;
1540         struct list_head *pos, *tpos;
1541         unsigned long flags;
1542
1543         spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1544         list_for_each_safe(pos, tpos, &cm_parent_listen_node->child_listen_list) {
1545                 child_listen_node = list_entry(pos, struct i40iw_cm_listener, child_listen_list);
1546                 if (child_listen_node->ipv4)
1547                         i40iw_debug(&iwdev->sc_dev,
1548                                     I40IW_DEBUG_CM,
1549                                     "removing child listen for IP=%pI4, port=%d, vlan=%d\n",
1550                                     child_listen_node->loc_addr,
1551                                     child_listen_node->loc_port,
1552                                     child_listen_node->vlan_id);
1553                 else
1554                         i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM,
1555                                     "removing child listen for IP=%pI6, port=%d, vlan=%d\n",
1556                                     child_listen_node->loc_addr,
1557                                     child_listen_node->loc_port,
1558                                     child_listen_node->vlan_id);
1559                 list_del(pos);
1560                 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1561                        sizeof(cm_info->loc_addr));
1562                 cm_info->vlan_id = child_listen_node->vlan_id;
1563                 if (child_listen_node->qhash_set) {
1564                         ret = i40iw_manage_qhash(iwdev, cm_info,
1565                                                  I40IW_QHASH_TYPE_TCP_SYN,
1566                                                  I40IW_QHASH_MANAGE_TYPE_DELETE,
1567                                                  NULL, false);
1568                         child_listen_node->qhash_set = false;
1569                 } else {
1570                         ret = I40IW_SUCCESS;
1571                 }
1572                 i40iw_debug(&iwdev->sc_dev,
1573                             I40IW_DEBUG_CM,
1574                             "freed pointer = %p\n",
1575                             child_listen_node);
1576                 kfree(child_listen_node);
1577                 cm_parent_listen_node->cm_core->stats_listen_nodes_destroyed++;
1578         }
1579         spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1580
1581         return ret;
1582 }
1583
1584 /**
1585  * i40iw_netdev_vlan_ipv6 - Gets the netdev and mac
1586  * @addr: local IPv6 address
1587  * @vlan_id: vlan id for the given IPv6 address
1588  * @mac: mac address for the given IPv6 address
1589  *
1590  * Returns the net_device of the IPv6 address and also sets the
1591  * vlan id and mac for that address.
1592  */
1593 static struct net_device *i40iw_netdev_vlan_ipv6(u32 *addr, u16 *vlan_id, u8 *mac)
1594 {
1595         struct net_device *ip_dev = NULL;
1596         struct in6_addr laddr6;
1597
1598         if (!IS_ENABLED(CONFIG_IPV6))
1599                 return NULL;
1600         i40iw_copy_ip_htonl(laddr6.in6_u.u6_addr32, addr);
1601         if (vlan_id)
1602                 *vlan_id = I40IW_NO_VLAN;
1603         if (mac)
1604                 eth_zero_addr(mac);
1605         rcu_read_lock();
1606         for_each_netdev_rcu(&init_net, ip_dev) {
1607                 if (ipv6_chk_addr(&init_net, &laddr6, ip_dev, 1)) {
1608                         if (vlan_id)
1609                                 *vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1610                         if (ip_dev->dev_addr && mac)
1611                                 ether_addr_copy(mac, ip_dev->dev_addr);
1612                         break;
1613                 }
1614         }
1615         rcu_read_unlock();
1616         return ip_dev;
1617 }
1618
1619 /**
1620  * i40iw_get_vlan_ipv4 - Returns the vlan_id for IPv4 address
1621  * @addr: local IPv4 address
1622  */
1623 static u16 i40iw_get_vlan_ipv4(u32 *addr)
1624 {
1625         struct net_device *netdev;
1626         u16 vlan_id = I40IW_NO_VLAN;
1627
1628         netdev = ip_dev_find(&init_net, htonl(addr[0]));
1629         if (netdev) {
1630                 vlan_id = rdma_vlan_dev_vlan_id(netdev);
1631                 dev_put(netdev);
1632         }
1633         return vlan_id;
1634 }
1635
1636 /**
1637  * i40iw_add_mqh_6 - Adds multiple qhashes for IPv6
1638  * @iwdev: iWarp device
1639  * @cm_info: CM info for parent listen node
1640  * @cm_parent_listen_node: The parent listen node
1641  *
1642  * Adds a qhash and a child listen node for every IPv6 address
1643  * on the adapter and adds the associated qhash filter
1644  */
1645 static enum i40iw_status_code i40iw_add_mqh_6(struct i40iw_device *iwdev,
1646                                               struct i40iw_cm_info *cm_info,
1647                                               struct i40iw_cm_listener *cm_parent_listen_node)
1648 {
1649         struct net_device *ip_dev;
1650         struct inet6_dev *idev;
1651         struct inet6_ifaddr *ifp, *tmp;
1652         enum i40iw_status_code ret = 0;
1653         struct i40iw_cm_listener *child_listen_node;
1654         unsigned long flags;
1655
1656         rtnl_lock();
1657         for_each_netdev_rcu(&init_net, ip_dev) {
1658                 if ((((rdma_vlan_dev_vlan_id(ip_dev) < I40IW_NO_VLAN) &&
1659                       (rdma_vlan_dev_real_dev(ip_dev) == iwdev->netdev)) ||
1660                      (ip_dev == iwdev->netdev)) && (ip_dev->flags & IFF_UP)) {
1661                         idev = __in6_dev_get(ip_dev);
1662                         if (!idev) {
1663                                 i40iw_pr_err("idev == NULL\n");
1664                                 break;
1665                         }
1666                         list_for_each_entry_safe(ifp, tmp, &idev->addr_list, if_list) {
1667                                 i40iw_debug(&iwdev->sc_dev,
1668                                             I40IW_DEBUG_CM,
1669                                             "IP=%pI6, vlan_id=%d, MAC=%pM\n",
1670                                             &ifp->addr,
1671                                             rdma_vlan_dev_vlan_id(ip_dev),
1672                                             ip_dev->dev_addr);
1673                                 child_listen_node =
1674                                         kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
1675                                 i40iw_debug(&iwdev->sc_dev,
1676                                             I40IW_DEBUG_CM,
1677                                             "Allocating child listener %p\n",
1678                                             child_listen_node);
1679                                 if (!child_listen_node) {
1680                                         ret = I40IW_ERR_NO_MEMORY;
1681                                         goto exit;
1682                                 }
1683                                 cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1684                                 cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1685
1686                                 memcpy(child_listen_node, cm_parent_listen_node,
1687                                        sizeof(*child_listen_node));
1688
1689                                 i40iw_copy_ip_ntohl(child_listen_node->loc_addr,
1690                                                     ifp->addr.in6_u.u6_addr32);
1691                                 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1692                                        sizeof(cm_info->loc_addr));
1693
1694                                 ret = i40iw_manage_qhash(iwdev, cm_info,
1695                                                          I40IW_QHASH_TYPE_TCP_SYN,
1696                                                          I40IW_QHASH_MANAGE_TYPE_ADD,
1697                                                          NULL, true);
1698                                 if (!ret) {
1699                                         child_listen_node->qhash_set = true;
1700                                         spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1701                                         list_add(&child_listen_node->child_listen_list,
1702                                                  &cm_parent_listen_node->child_listen_list);
1703                                         spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1704                                         cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
1705                                 } else {
1706                                         kfree(child_listen_node);
1707                                 }
1708                         }
1709                 }
1710         }
1711 exit:
1712         rtnl_unlock();
1713         return ret;
1714 }
1715
1716 /**
1717  * i40iw_add_mqh_4 - Adds multiple qhashes for IPv4
1718  * @iwdev: iWarp device
1719  * @cm_info: CM info for parent listen node
1720  * @cm_parent_listen_node: The parent listen node
1721  *
1722  * Adds a qhash and a child listen node for every IPv4 address
1723  * on the adapter and adds the associated qhash filter
1724  */
1725 static enum i40iw_status_code i40iw_add_mqh_4(
1726                                 struct i40iw_device *iwdev,
1727                                 struct i40iw_cm_info *cm_info,
1728                                 struct i40iw_cm_listener *cm_parent_listen_node)
1729 {
1730         struct net_device *dev;
1731         struct in_device *idev;
1732         struct i40iw_cm_listener *child_listen_node;
1733         enum i40iw_status_code ret = 0;
1734         unsigned long flags;
1735
1736         rtnl_lock();
1737         for_each_netdev(&init_net, dev) {
1738                 if ((((rdma_vlan_dev_vlan_id(dev) < I40IW_NO_VLAN) &&
1739                       (rdma_vlan_dev_real_dev(dev) == iwdev->netdev)) ||
1740                     (dev == iwdev->netdev)) && (dev->flags & IFF_UP)) {
1741                         idev = in_dev_get(dev);
1742                         for_ifa(idev) {
1743                                 i40iw_debug(&iwdev->sc_dev,
1744                                             I40IW_DEBUG_CM,
1745                                             "Allocating child CM Listener forIP=%pI4, vlan_id=%d, MAC=%pM\n",
1746                                             &ifa->ifa_address,
1747                                             rdma_vlan_dev_vlan_id(dev),
1748                                             dev->dev_addr);
1749                                 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
1750                                 cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
1751                                 i40iw_debug(&iwdev->sc_dev,
1752                                             I40IW_DEBUG_CM,
1753                                             "Allocating child listener %p\n",
1754                                             child_listen_node);
1755                                 if (!child_listen_node) {
1756                                         in_dev_put(idev);
1757                                         ret = I40IW_ERR_NO_MEMORY;
1758                                         goto exit;
1759                                 }
1760                                 cm_info->vlan_id = rdma_vlan_dev_vlan_id(dev);
1761                                 cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1762                                 memcpy(child_listen_node,
1763                                        cm_parent_listen_node,
1764                                        sizeof(*child_listen_node));
1765
1766                                 child_listen_node->loc_addr[0] = ntohl(ifa->ifa_address);
1767                                 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1768                                        sizeof(cm_info->loc_addr));
1769
1770                                 ret = i40iw_manage_qhash(iwdev,
1771                                                          cm_info,
1772                                                          I40IW_QHASH_TYPE_TCP_SYN,
1773                                                          I40IW_QHASH_MANAGE_TYPE_ADD,
1774                                                          NULL,
1775                                                          true);
1776                                 if (!ret) {
1777                                         child_listen_node->qhash_set = true;
1778                                         spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1779                                         list_add(&child_listen_node->child_listen_list,
1780                                                  &cm_parent_listen_node->child_listen_list);
1781                                         spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1782                                 } else {
1783                                         kfree(child_listen_node);
1784                                         cm_parent_listen_node->cm_core->stats_listen_nodes_created--;
1785                                 }
1786                         }
1787                         endfor_ifa(idev);
1788                         in_dev_put(idev);
1789                 }
1790         }
1791 exit:
1792         rtnl_unlock();
1793         return ret;
1794 }
1795
1796 /**
1797  * i40iw_dec_refcnt_listen - delete listener and associated cm nodes
1798  * @cm_core: cm's core
1799  * @free_hanging_nodes: to free associated cm_nodes
1800  * @apbvt_del: flag to delete the apbvt
1801  */
1802 static int i40iw_dec_refcnt_listen(struct i40iw_cm_core *cm_core,
1803                                    struct i40iw_cm_listener *listener,
1804                                    int free_hanging_nodes, bool apbvt_del)
1805 {
1806         int ret = -EINVAL;
1807         int err = 0;
1808         struct list_head *list_pos;
1809         struct list_head *list_temp;
1810         struct i40iw_cm_node *cm_node;
1811         struct list_head reset_list;
1812         struct i40iw_cm_info nfo;
1813         struct i40iw_cm_node *loopback;
1814         enum i40iw_cm_node_state old_state;
1815         unsigned long flags;
1816
1817         /* free non-accelerated child nodes for this listener */
1818         INIT_LIST_HEAD(&reset_list);
1819         if (free_hanging_nodes) {
1820                 spin_lock_irqsave(&cm_core->ht_lock, flags);
1821                 list_for_each_safe(list_pos, list_temp, &cm_core->connected_nodes) {
1822                         cm_node = container_of(list_pos, struct i40iw_cm_node, list);
1823                         if ((cm_node->listener == listener) && !cm_node->accelerated) {
1824                                 atomic_inc(&cm_node->ref_count);
1825                                 list_add(&cm_node->reset_entry, &reset_list);
1826                         }
1827                 }
1828                 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1829         }
1830
1831         list_for_each_safe(list_pos, list_temp, &reset_list) {
1832                 cm_node = container_of(list_pos, struct i40iw_cm_node, reset_entry);
1833                 loopback = cm_node->loopbackpartner;
1834                 if (cm_node->state >= I40IW_CM_STATE_FIN_WAIT1) {
1835                         i40iw_rem_ref_cm_node(cm_node);
1836                 } else {
1837                         if (!loopback) {
1838                                 i40iw_cleanup_retrans_entry(cm_node);
1839                                 err = i40iw_send_reset(cm_node);
1840                                 if (err) {
1841                                         cm_node->state = I40IW_CM_STATE_CLOSED;
1842                                         i40iw_pr_err("send reset\n");
1843                                 } else {
1844                                         old_state = cm_node->state;
1845                                         cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED;
1846                                         if (old_state != I40IW_CM_STATE_MPAREQ_RCVD)
1847                                                 i40iw_rem_ref_cm_node(cm_node);
1848                                 }
1849                         } else {
1850                                 struct i40iw_cm_event event;
1851
1852                                 event.cm_node = loopback;
1853                                 memcpy(event.cm_info.rem_addr,
1854                                        loopback->rem_addr, sizeof(event.cm_info.rem_addr));
1855                                 memcpy(event.cm_info.loc_addr,
1856                                        loopback->loc_addr, sizeof(event.cm_info.loc_addr));
1857                                 event.cm_info.rem_port = loopback->rem_port;
1858                                 event.cm_info.loc_port = loopback->loc_port;
1859                                 event.cm_info.cm_id = loopback->cm_id;
1860                                 event.cm_info.ipv4 = loopback->ipv4;
1861                                 atomic_inc(&loopback->ref_count);
1862                                 loopback->state = I40IW_CM_STATE_CLOSED;
1863                                 i40iw_event_connect_error(&event);
1864                                 cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED;
1865                                 i40iw_rem_ref_cm_node(cm_node);
1866                         }
1867                 }
1868         }
1869
1870         if (!atomic_dec_return(&listener->ref_count)) {
1871                 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1872                 list_del(&listener->list);
1873                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1874
1875                 if (listener->iwdev) {
1876                         if (apbvt_del && !i40iw_listen_port_in_use(cm_core, listener->loc_port))
1877                                 i40iw_manage_apbvt(listener->iwdev,
1878                                                    listener->loc_port,
1879                                                    I40IW_MANAGE_APBVT_DEL);
1880
1881                         memcpy(nfo.loc_addr, listener->loc_addr, sizeof(nfo.loc_addr));
1882                         nfo.loc_port = listener->loc_port;
1883                         nfo.ipv4 = listener->ipv4;
1884                         nfo.vlan_id = listener->vlan_id;
1885                         nfo.user_pri = listener->user_pri;
1886
1887                         if (!list_empty(&listener->child_listen_list)) {
1888                                 i40iw_del_multiple_qhash(listener->iwdev, &nfo, listener);
1889                         } else {
1890                                 if (listener->qhash_set)
1891                                         i40iw_manage_qhash(listener->iwdev,
1892                                                            &nfo,
1893                                                            I40IW_QHASH_TYPE_TCP_SYN,
1894                                                            I40IW_QHASH_MANAGE_TYPE_DELETE,
1895                                                            NULL,
1896                                                            false);
1897                         }
1898                 }
1899
1900                 cm_core->stats_listen_destroyed++;
1901                 kfree(listener);
1902                 cm_core->stats_listen_nodes_destroyed++;
1903                 listener = NULL;
1904                 ret = 0;
1905         }
1906
1907         if (listener) {
1908                 if (atomic_read(&listener->pend_accepts_cnt) > 0)
1909                         i40iw_debug(cm_core->dev,
1910                                     I40IW_DEBUG_CM,
1911                                     "%s: listener (%p) pending accepts=%u\n",
1912                                     __func__,
1913                                     listener,
1914                                     atomic_read(&listener->pend_accepts_cnt));
1915         }
1916
1917         return ret;
1918 }
1919
1920 /**
1921  * i40iw_cm_del_listen - delete a linstener
1922  * @cm_core: cm's core
1923   * @listener: passive connection's listener
1924  * @apbvt_del: flag to delete apbvt
1925  */
1926 static int i40iw_cm_del_listen(struct i40iw_cm_core *cm_core,
1927                                struct i40iw_cm_listener *listener,
1928                                bool apbvt_del)
1929 {
1930         listener->listener_state = I40IW_CM_LISTENER_PASSIVE_STATE;
1931         listener->cm_id = NULL; /* going to be destroyed pretty soon */
1932         return i40iw_dec_refcnt_listen(cm_core, listener, 1, apbvt_del);
1933 }
1934
1935 /**
1936  * i40iw_addr_resolve_neigh - resolve neighbor address
1937  * @iwdev: iwarp device structure
1938  * @src_ip: local ip address
1939  * @dst_ip: remote ip address
1940  * @arpindex: if there is an arp entry
1941  */
1942 static int i40iw_addr_resolve_neigh(struct i40iw_device *iwdev,
1943                                     u32 src_ip,
1944                                     u32 dst_ip,
1945                                     int arpindex)
1946 {
1947         struct rtable *rt;
1948         struct neighbour *neigh;
1949         int rc = arpindex;
1950         struct net_device *netdev = iwdev->netdev;
1951         __be32 dst_ipaddr = htonl(dst_ip);
1952         __be32 src_ipaddr = htonl(src_ip);
1953
1954         rt = ip_route_output(&init_net, dst_ipaddr, src_ipaddr, 0, 0);
1955         if (IS_ERR(rt)) {
1956                 i40iw_pr_err("ip_route_output\n");
1957                 return rc;
1958         }
1959
1960         if (netif_is_bond_slave(netdev))
1961                 netdev = netdev_master_upper_dev_get(netdev);
1962
1963         neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr);
1964
1965         rcu_read_lock();
1966         if (neigh) {
1967                 if (neigh->nud_state & NUD_VALID) {
1968                         if (arpindex >= 0) {
1969                                 if (ether_addr_equal(iwdev->arp_table[arpindex].mac_addr,
1970                                                      neigh->ha))
1971                                         /* Mac address same as arp table */
1972                                         goto resolve_neigh_exit;
1973                                 i40iw_manage_arp_cache(iwdev,
1974                                                        iwdev->arp_table[arpindex].mac_addr,
1975                                                        &dst_ip,
1976                                                        true,
1977                                                        I40IW_ARP_DELETE);
1978                         }
1979
1980                         i40iw_manage_arp_cache(iwdev, neigh->ha, &dst_ip, true, I40IW_ARP_ADD);
1981                         rc = i40iw_arp_table(iwdev, &dst_ip, true, NULL, I40IW_ARP_RESOLVE);
1982                 } else {
1983                         neigh_event_send(neigh, NULL);
1984                 }
1985         }
1986  resolve_neigh_exit:
1987
1988         rcu_read_unlock();
1989         if (neigh)
1990                 neigh_release(neigh);
1991
1992         ip_rt_put(rt);
1993         return rc;
1994 }
1995
1996 /**
1997  * i40iw_get_dst_ipv6
1998  */
1999 static struct dst_entry *i40iw_get_dst_ipv6(struct sockaddr_in6 *src_addr,
2000                                             struct sockaddr_in6 *dst_addr)
2001 {
2002         struct dst_entry *dst;
2003         struct flowi6 fl6;
2004
2005         memset(&fl6, 0, sizeof(fl6));
2006         fl6.daddr = dst_addr->sin6_addr;
2007         fl6.saddr = src_addr->sin6_addr;
2008         if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
2009                 fl6.flowi6_oif = dst_addr->sin6_scope_id;
2010
2011         dst = ip6_route_output(&init_net, NULL, &fl6);
2012         return dst;
2013 }
2014
2015 /**
2016  * i40iw_addr_resolve_neigh_ipv6 - resolve neighbor ipv6 address
2017  * @iwdev: iwarp device structure
2018  * @dst_ip: remote ip address
2019  * @arpindex: if there is an arp entry
2020  */
2021 static int i40iw_addr_resolve_neigh_ipv6(struct i40iw_device *iwdev,
2022                                          u32 *src,
2023                                          u32 *dest,
2024                                          int arpindex)
2025 {
2026         struct neighbour *neigh;
2027         int rc = arpindex;
2028         struct net_device *netdev = iwdev->netdev;
2029         struct dst_entry *dst;
2030         struct sockaddr_in6 dst_addr;
2031         struct sockaddr_in6 src_addr;
2032
2033         memset(&dst_addr, 0, sizeof(dst_addr));
2034         dst_addr.sin6_family = AF_INET6;
2035         i40iw_copy_ip_htonl(dst_addr.sin6_addr.in6_u.u6_addr32, dest);
2036         memset(&src_addr, 0, sizeof(src_addr));
2037         src_addr.sin6_family = AF_INET6;
2038         i40iw_copy_ip_htonl(src_addr.sin6_addr.in6_u.u6_addr32, src);
2039         dst = i40iw_get_dst_ipv6(&src_addr, &dst_addr);
2040         if (!dst || dst->error) {
2041                 if (dst) {
2042                         dst_release(dst);
2043                         i40iw_pr_err("ip6_route_output returned dst->error = %d\n",
2044                                      dst->error);
2045                 }
2046                 return rc;
2047         }
2048
2049         if (netif_is_bond_slave(netdev))
2050                 netdev = netdev_master_upper_dev_get(netdev);
2051
2052         neigh = dst_neigh_lookup(dst, &dst_addr);
2053
2054         rcu_read_lock();
2055         if (neigh) {
2056                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "dst_neigh_lookup MAC=%pM\n", neigh->ha);
2057                 if (neigh->nud_state & NUD_VALID) {
2058                         if (arpindex >= 0) {
2059                                 if (ether_addr_equal
2060                                     (iwdev->arp_table[arpindex].mac_addr,
2061                                      neigh->ha)) {
2062                                         /* Mac address same as in arp table */
2063                                         goto resolve_neigh_exit6;
2064                                 }
2065                                 i40iw_manage_arp_cache(iwdev,
2066                                                        iwdev->arp_table[arpindex].mac_addr,
2067                                                        dest,
2068                                                        false,
2069                                                        I40IW_ARP_DELETE);
2070                         }
2071                         i40iw_manage_arp_cache(iwdev,
2072                                                neigh->ha,
2073                                                dest,
2074                                                false,
2075                                                I40IW_ARP_ADD);
2076                         rc = i40iw_arp_table(iwdev,
2077                                              dest,
2078                                              false,
2079                                              NULL,
2080                                              I40IW_ARP_RESOLVE);
2081                 } else {
2082                         neigh_event_send(neigh, NULL);
2083                 }
2084         }
2085
2086  resolve_neigh_exit6:
2087         rcu_read_unlock();
2088         if (neigh)
2089                 neigh_release(neigh);
2090         dst_release(dst);
2091         return rc;
2092 }
2093
2094 /**
2095  * i40iw_ipv4_is_loopback - check if loopback
2096  * @loc_addr: local addr to compare
2097  * @rem_addr: remote address
2098  */
2099 static bool i40iw_ipv4_is_loopback(u32 loc_addr, u32 rem_addr)
2100 {
2101         return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr);
2102 }
2103
2104 /**
2105  * i40iw_ipv6_is_loopback - check if loopback
2106  * @loc_addr: local addr to compare
2107  * @rem_addr: remote address
2108  */
2109 static bool i40iw_ipv6_is_loopback(u32 *loc_addr, u32 *rem_addr)
2110 {
2111         struct in6_addr raddr6;
2112
2113         i40iw_copy_ip_htonl(raddr6.in6_u.u6_addr32, rem_addr);
2114         return !memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6);
2115 }
2116
2117 /**
2118  * i40iw_make_cm_node - create a new instance of a cm node
2119  * @cm_core: cm's core
2120  * @iwdev: iwarp device structure
2121  * @cm_info: quad info for connection
2122  * @listener: passive connection's listener
2123  */
2124 static struct i40iw_cm_node *i40iw_make_cm_node(
2125                                    struct i40iw_cm_core *cm_core,
2126                                    struct i40iw_device *iwdev,
2127                                    struct i40iw_cm_info *cm_info,
2128                                    struct i40iw_cm_listener *listener)
2129 {
2130         struct i40iw_cm_node *cm_node;
2131         struct timespec ts;
2132         int oldarpindex;
2133         int arpindex;
2134         struct net_device *netdev = iwdev->netdev;
2135
2136         /* create an hte and cm_node for this instance */
2137         cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
2138         if (!cm_node)
2139                 return NULL;
2140
2141         /* set our node specific transport info */
2142         cm_node->ipv4 = cm_info->ipv4;
2143         cm_node->vlan_id = cm_info->vlan_id;
2144         if ((cm_node->vlan_id == I40IW_NO_VLAN) && iwdev->dcb)
2145                 cm_node->vlan_id = 0;
2146         cm_node->tos = cm_info->tos;
2147         cm_node->user_pri = cm_info->user_pri;
2148         if (listener) {
2149                 if (listener->tos != cm_info->tos)
2150                         i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB,
2151                                     "application TOS[%d] and remote client TOS[%d] mismatch\n",
2152                                      listener->tos, cm_info->tos);
2153                 cm_node->tos = max(listener->tos, cm_info->tos);
2154                 cm_node->user_pri = rt_tos2priority(cm_node->tos);
2155                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB, "listener: TOS:[%d] UP:[%d]\n",
2156                             cm_node->tos, cm_node->user_pri);
2157         }
2158         memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr));
2159         memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr));
2160         cm_node->loc_port = cm_info->loc_port;
2161         cm_node->rem_port = cm_info->rem_port;
2162
2163         cm_node->mpa_frame_rev = iwdev->mpa_version;
2164         cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
2165         cm_node->ird_size = I40IW_MAX_IRD_SIZE;
2166         cm_node->ord_size = I40IW_MAX_ORD_SIZE;
2167
2168         cm_node->listener = listener;
2169         cm_node->cm_id = cm_info->cm_id;
2170         ether_addr_copy(cm_node->loc_mac, netdev->dev_addr);
2171         spin_lock_init(&cm_node->retrans_list_lock);
2172
2173         atomic_set(&cm_node->ref_count, 1);
2174         /* associate our parent CM core */
2175         cm_node->cm_core = cm_core;
2176         cm_node->tcp_cntxt.loc_id = I40IW_CM_DEF_LOCAL_ID;
2177         cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE;
2178         cm_node->tcp_cntxt.rcv_wnd =
2179                         I40IW_CM_DEFAULT_RCV_WND_SCALED >> I40IW_CM_DEFAULT_RCV_WND_SCALE;
2180         ts = current_kernel_time();
2181         cm_node->tcp_cntxt.loc_seq_num = ts.tv_nsec;
2182         cm_node->tcp_cntxt.mss = iwdev->vsi.mss;
2183
2184         cm_node->iwdev = iwdev;
2185         cm_node->dev = &iwdev->sc_dev;
2186
2187         if ((cm_node->ipv4 &&
2188              i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
2189              (!cm_node->ipv4 && i40iw_ipv6_is_loopback(cm_node->loc_addr,
2190                                                        cm_node->rem_addr))) {
2191                 arpindex = i40iw_arp_table(iwdev,
2192                                            cm_node->rem_addr,
2193                                            false,
2194                                            NULL,
2195                                            I40IW_ARP_RESOLVE);
2196         } else {
2197                 oldarpindex = i40iw_arp_table(iwdev,
2198                                               cm_node->rem_addr,
2199                                               false,
2200                                               NULL,
2201                                               I40IW_ARP_RESOLVE);
2202                 if (cm_node->ipv4)
2203                         arpindex = i40iw_addr_resolve_neigh(iwdev,
2204                                                             cm_info->loc_addr[0],
2205                                                             cm_info->rem_addr[0],
2206                                                             oldarpindex);
2207                 else if (IS_ENABLED(CONFIG_IPV6))
2208                         arpindex = i40iw_addr_resolve_neigh_ipv6(iwdev,
2209                                                                  cm_info->loc_addr,
2210                                                                  cm_info->rem_addr,
2211                                                                  oldarpindex);
2212                 else
2213                         arpindex = -EINVAL;
2214         }
2215         if (arpindex < 0) {
2216                 i40iw_pr_err("cm_node arpindex\n");
2217                 kfree(cm_node);
2218                 return NULL;
2219         }
2220         ether_addr_copy(cm_node->rem_mac, iwdev->arp_table[arpindex].mac_addr);
2221         i40iw_add_hte_node(cm_core, cm_node);
2222         cm_core->stats_nodes_created++;
2223         return cm_node;
2224 }
2225
2226 /**
2227  * i40iw_rem_ref_cm_node - destroy an instance of a cm node
2228  * @cm_node: connection's node
2229  */
2230 static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *cm_node)
2231 {
2232         struct i40iw_cm_core *cm_core = cm_node->cm_core;
2233         struct i40iw_qp *iwqp;
2234         struct i40iw_cm_info nfo;
2235         unsigned long flags;
2236
2237         spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
2238         if (atomic_dec_return(&cm_node->ref_count)) {
2239                 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
2240                 return;
2241         }
2242         list_del(&cm_node->list);
2243         spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
2244
2245         /* if the node is destroyed before connection was accelerated */
2246         if (!cm_node->accelerated && cm_node->accept_pend) {
2247                 pr_err("node destroyed before established\n");
2248                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
2249         }
2250         if (cm_node->close_entry)
2251                 i40iw_handle_close_entry(cm_node, 0);
2252         if (cm_node->listener) {
2253                 i40iw_dec_refcnt_listen(cm_core, cm_node->listener, 0, true);
2254         } else {
2255                 if (!i40iw_listen_port_in_use(cm_core, cm_node->loc_port) &&
2256                     cm_node->apbvt_set) {
2257                         i40iw_manage_apbvt(cm_node->iwdev,
2258                                            cm_node->loc_port,
2259                                            I40IW_MANAGE_APBVT_DEL);
2260                         i40iw_get_addr_info(cm_node, &nfo);
2261                         if (cm_node->qhash_set) {
2262                                 i40iw_manage_qhash(cm_node->iwdev,
2263                                                    &nfo,
2264                                                    I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2265                                                    I40IW_QHASH_MANAGE_TYPE_DELETE,
2266                                                    NULL,
2267                                                    false);
2268                                 cm_node->qhash_set = 0;
2269                         }
2270                 }
2271         }
2272
2273         iwqp = cm_node->iwqp;
2274         if (iwqp) {
2275                 iwqp->cm_node = NULL;
2276                 i40iw_rem_ref(&iwqp->ibqp);
2277                 cm_node->iwqp = NULL;
2278         } else if (cm_node->qhash_set) {
2279                 i40iw_get_addr_info(cm_node, &nfo);
2280                 i40iw_manage_qhash(cm_node->iwdev,
2281                                    &nfo,
2282                                    I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2283                                    I40IW_QHASH_MANAGE_TYPE_DELETE,
2284                                    NULL,
2285                                    false);
2286                 cm_node->qhash_set = 0;
2287         }
2288
2289         cm_node->cm_core->stats_nodes_destroyed++;
2290         kfree(cm_node);
2291 }
2292
2293 /**
2294  * i40iw_handle_fin_pkt - FIN packet received
2295  * @cm_node: connection's node
2296  */
2297 static void i40iw_handle_fin_pkt(struct i40iw_cm_node *cm_node)
2298 {
2299         u32 ret;
2300
2301         switch (cm_node->state) {
2302         case I40IW_CM_STATE_SYN_RCVD:
2303         case I40IW_CM_STATE_SYN_SENT:
2304         case I40IW_CM_STATE_ESTABLISHED:
2305         case I40IW_CM_STATE_MPAREJ_RCVD:
2306                 cm_node->tcp_cntxt.rcv_nxt++;
2307                 i40iw_cleanup_retrans_entry(cm_node);
2308                 cm_node->state = I40IW_CM_STATE_LAST_ACK;
2309                 i40iw_send_fin(cm_node);
2310                 break;
2311         case I40IW_CM_STATE_MPAREQ_SENT:
2312                 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
2313                 cm_node->tcp_cntxt.rcv_nxt++;
2314                 i40iw_cleanup_retrans_entry(cm_node);
2315                 cm_node->state = I40IW_CM_STATE_CLOSED;
2316                 atomic_inc(&cm_node->ref_count);
2317                 i40iw_send_reset(cm_node);
2318                 break;
2319         case I40IW_CM_STATE_FIN_WAIT1:
2320                 cm_node->tcp_cntxt.rcv_nxt++;
2321                 i40iw_cleanup_retrans_entry(cm_node);
2322                 cm_node->state = I40IW_CM_STATE_CLOSING;
2323                 i40iw_send_ack(cm_node);
2324                 /*
2325                  * Wait for ACK as this is simultaneous close.
2326                  * After we receive ACK, do not send anything.
2327                  * Just rm the node.
2328                  */
2329                 break;
2330         case I40IW_CM_STATE_FIN_WAIT2:
2331                 cm_node->tcp_cntxt.rcv_nxt++;
2332                 i40iw_cleanup_retrans_entry(cm_node);
2333                 cm_node->state = I40IW_CM_STATE_TIME_WAIT;
2334                 i40iw_send_ack(cm_node);
2335                 ret =
2336                     i40iw_schedule_cm_timer(cm_node, NULL, I40IW_TIMER_TYPE_CLOSE, 1, 0);
2337                 if (ret)
2338                         i40iw_pr_err("node %p state = %d\n", cm_node, cm_node->state);
2339                 break;
2340         case I40IW_CM_STATE_TIME_WAIT:
2341                 cm_node->tcp_cntxt.rcv_nxt++;
2342                 i40iw_cleanup_retrans_entry(cm_node);
2343                 cm_node->state = I40IW_CM_STATE_CLOSED;
2344                 i40iw_rem_ref_cm_node(cm_node);
2345                 break;
2346         case I40IW_CM_STATE_OFFLOADED:
2347         default:
2348                 i40iw_pr_err("bad state node %p state = %d\n", cm_node, cm_node->state);
2349                 break;
2350         }
2351 }
2352
2353 /**
2354  * i40iw_handle_rst_pkt - process received RST packet
2355  * @cm_node: connection's node
2356  * @rbuf: receive buffer
2357  */
2358 static void i40iw_handle_rst_pkt(struct i40iw_cm_node *cm_node,
2359                                  struct i40iw_puda_buf *rbuf)
2360 {
2361         i40iw_cleanup_retrans_entry(cm_node);
2362         switch (cm_node->state) {
2363         case I40IW_CM_STATE_SYN_SENT:
2364         case I40IW_CM_STATE_MPAREQ_SENT:
2365                 switch (cm_node->mpa_frame_rev) {
2366                 case IETF_MPA_V2:
2367                         cm_node->mpa_frame_rev = IETF_MPA_V1;
2368                         /* send a syn and goto syn sent state */
2369                         cm_node->state = I40IW_CM_STATE_SYN_SENT;
2370                         if (i40iw_send_syn(cm_node, 0))
2371                                 i40iw_active_open_err(cm_node, false);
2372                         break;
2373                 case IETF_MPA_V1:
2374                 default:
2375                         i40iw_active_open_err(cm_node, false);
2376                         break;
2377                 }
2378                 break;
2379         case I40IW_CM_STATE_MPAREQ_RCVD:
2380                 atomic_add_return(1, &cm_node->passive_state);
2381                 break;
2382         case I40IW_CM_STATE_ESTABLISHED:
2383         case I40IW_CM_STATE_SYN_RCVD:
2384         case I40IW_CM_STATE_LISTENING:
2385                 i40iw_pr_err("Bad state state = %d\n", cm_node->state);
2386                 i40iw_passive_open_err(cm_node, false);
2387                 break;
2388         case I40IW_CM_STATE_OFFLOADED:
2389                 i40iw_active_open_err(cm_node, false);
2390                 break;
2391         case I40IW_CM_STATE_CLOSED:
2392                 break;
2393         case I40IW_CM_STATE_FIN_WAIT2:
2394         case I40IW_CM_STATE_FIN_WAIT1:
2395         case I40IW_CM_STATE_LAST_ACK:
2396                 cm_node->cm_id->rem_ref(cm_node->cm_id);
2397         case I40IW_CM_STATE_TIME_WAIT:
2398                 cm_node->state = I40IW_CM_STATE_CLOSED;
2399                 i40iw_rem_ref_cm_node(cm_node);
2400                 break;
2401         default:
2402                 break;
2403         }
2404 }
2405
2406 /**
2407  * i40iw_handle_rcv_mpa - Process a recv'd mpa buffer
2408  * @cm_node: connection's node
2409  * @rbuf: receive buffer
2410  */
2411 static void i40iw_handle_rcv_mpa(struct i40iw_cm_node *cm_node,
2412                                  struct i40iw_puda_buf *rbuf)
2413 {
2414         int ret;
2415         int datasize = rbuf->datalen;
2416         u8 *dataloc = rbuf->data;
2417
2418         enum i40iw_cm_event_type type = I40IW_CM_EVENT_UNKNOWN;
2419         u32 res_type;
2420
2421         ret = i40iw_parse_mpa(cm_node, dataloc, &res_type, datasize);
2422         if (ret) {
2423                 if (cm_node->state == I40IW_CM_STATE_MPAREQ_SENT)
2424                         i40iw_active_open_err(cm_node, true);
2425                 else
2426                         i40iw_passive_open_err(cm_node, true);
2427                 return;
2428         }
2429
2430         switch (cm_node->state) {
2431         case I40IW_CM_STATE_ESTABLISHED:
2432                 if (res_type == I40IW_MPA_REQUEST_REJECT)
2433                         i40iw_pr_err("state for reject\n");
2434                 cm_node->state = I40IW_CM_STATE_MPAREQ_RCVD;
2435                 type = I40IW_CM_EVENT_MPA_REQ;
2436                 i40iw_send_ack(cm_node);        /* ACK received MPA request */
2437                 atomic_set(&cm_node->passive_state,
2438                            I40IW_PASSIVE_STATE_INDICATED);
2439                 break;
2440         case I40IW_CM_STATE_MPAREQ_SENT:
2441                 i40iw_cleanup_retrans_entry(cm_node);
2442                 if (res_type == I40IW_MPA_REQUEST_REJECT) {
2443                         type = I40IW_CM_EVENT_MPA_REJECT;
2444                         cm_node->state = I40IW_CM_STATE_MPAREJ_RCVD;
2445                 } else {
2446                         type = I40IW_CM_EVENT_CONNECTED;
2447                         cm_node->state = I40IW_CM_STATE_OFFLOADED;
2448                 }
2449                 i40iw_send_ack(cm_node);
2450                 break;
2451         default:
2452                 pr_err("%s wrong cm_node state =%d\n", __func__, cm_node->state);
2453                 break;
2454         }
2455         i40iw_create_event(cm_node, type);
2456 }
2457
2458 /**
2459  * i40iw_indicate_pkt_err - Send up err event to cm
2460  * @cm_node: connection's node
2461  */
2462 static void i40iw_indicate_pkt_err(struct i40iw_cm_node *cm_node)
2463 {
2464         switch (cm_node->state) {
2465         case I40IW_CM_STATE_SYN_SENT:
2466         case I40IW_CM_STATE_MPAREQ_SENT:
2467                 i40iw_active_open_err(cm_node, true);
2468                 break;
2469         case I40IW_CM_STATE_ESTABLISHED:
2470         case I40IW_CM_STATE_SYN_RCVD:
2471                 i40iw_passive_open_err(cm_node, true);
2472                 break;
2473         case I40IW_CM_STATE_OFFLOADED:
2474         default:
2475                 break;
2476         }
2477 }
2478
2479 /**
2480  * i40iw_check_syn - Check for error on received syn ack
2481  * @cm_node: connection's node
2482  * @tcph: pointer tcp header
2483  */
2484 static int i40iw_check_syn(struct i40iw_cm_node *cm_node, struct tcphdr *tcph)
2485 {
2486         int err = 0;
2487
2488         if (ntohl(tcph->ack_seq) != cm_node->tcp_cntxt.loc_seq_num) {
2489                 err = 1;
2490                 i40iw_active_open_err(cm_node, true);
2491         }
2492         return err;
2493 }
2494
2495 /**
2496  * i40iw_check_seq - check seq numbers if OK
2497  * @cm_node: connection's node
2498  * @tcph: pointer tcp header
2499  */
2500 static int i40iw_check_seq(struct i40iw_cm_node *cm_node, struct tcphdr *tcph)
2501 {
2502         int err = 0;
2503         u32 seq;
2504         u32 ack_seq;
2505         u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
2506         u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
2507         u32 rcv_wnd;
2508
2509         seq = ntohl(tcph->seq);
2510         ack_seq = ntohl(tcph->ack_seq);
2511         rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
2512         if (ack_seq != loc_seq_num)
2513                 err = -1;
2514         else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
2515                 err = -1;
2516         if (err) {
2517                 i40iw_pr_err("seq number\n");
2518                 i40iw_indicate_pkt_err(cm_node);
2519         }
2520         return err;
2521 }
2522
2523 /**
2524  * i40iw_handle_syn_pkt - is for Passive node
2525  * @cm_node: connection's node
2526  * @rbuf: receive buffer
2527  */
2528 static void i40iw_handle_syn_pkt(struct i40iw_cm_node *cm_node,
2529                                  struct i40iw_puda_buf *rbuf)
2530 {
2531         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2532         int ret;
2533         u32 inc_sequence;
2534         int optionsize;
2535         struct i40iw_cm_info nfo;
2536
2537         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2538         inc_sequence = ntohl(tcph->seq);
2539
2540         switch (cm_node->state) {
2541         case I40IW_CM_STATE_SYN_SENT:
2542         case I40IW_CM_STATE_MPAREQ_SENT:
2543                 /* Rcvd syn on active open connection */
2544                 i40iw_active_open_err(cm_node, 1);
2545                 break;
2546         case I40IW_CM_STATE_LISTENING:
2547                 /* Passive OPEN */
2548                 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
2549                     cm_node->listener->backlog) {
2550                         cm_node->cm_core->stats_backlog_drops++;
2551                         i40iw_passive_open_err(cm_node, false);
2552                         break;
2553                 }
2554                 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1);
2555                 if (ret) {
2556                         i40iw_passive_open_err(cm_node, false);
2557                         /* drop pkt */
2558                         break;
2559                 }
2560                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2561                 cm_node->accept_pend = 1;
2562                 atomic_inc(&cm_node->listener->pend_accepts_cnt);
2563
2564                 cm_node->state = I40IW_CM_STATE_SYN_RCVD;
2565                 i40iw_get_addr_info(cm_node, &nfo);
2566                 ret = i40iw_manage_qhash(cm_node->iwdev,
2567                                          &nfo,
2568                                          I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2569                                          I40IW_QHASH_MANAGE_TYPE_ADD,
2570                                          (void *)cm_node,
2571                                          false);
2572                 cm_node->qhash_set = true;
2573                 break;
2574         case I40IW_CM_STATE_CLOSED:
2575                 i40iw_cleanup_retrans_entry(cm_node);
2576                 atomic_inc(&cm_node->ref_count);
2577                 i40iw_send_reset(cm_node);
2578                 break;
2579         case I40IW_CM_STATE_OFFLOADED:
2580         case I40IW_CM_STATE_ESTABLISHED:
2581         case I40IW_CM_STATE_FIN_WAIT1:
2582         case I40IW_CM_STATE_FIN_WAIT2:
2583         case I40IW_CM_STATE_MPAREQ_RCVD:
2584         case I40IW_CM_STATE_LAST_ACK:
2585         case I40IW_CM_STATE_CLOSING:
2586         case I40IW_CM_STATE_UNKNOWN:
2587         default:
2588                 break;
2589         }
2590 }
2591
2592 /**
2593  * i40iw_handle_synack_pkt - Process SYN+ACK packet (active side)
2594  * @cm_node: connection's node
2595  * @rbuf: receive buffer
2596  */
2597 static void i40iw_handle_synack_pkt(struct i40iw_cm_node *cm_node,
2598                                     struct i40iw_puda_buf *rbuf)
2599 {
2600         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2601         int ret;
2602         u32 inc_sequence;
2603         int optionsize;
2604
2605         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2606         inc_sequence = ntohl(tcph->seq);
2607         switch (cm_node->state) {
2608         case I40IW_CM_STATE_SYN_SENT:
2609                 i40iw_cleanup_retrans_entry(cm_node);
2610                 /* active open */
2611                 if (i40iw_check_syn(cm_node, tcph)) {
2612                         i40iw_pr_err("check syn fail\n");
2613                         return;
2614                 }
2615                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2616                 /* setup options */
2617                 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 0);
2618                 if (ret) {
2619                         i40iw_debug(cm_node->dev,
2620                                     I40IW_DEBUG_CM,
2621                                     "cm_node=%p tcp_options failed\n",
2622                                     cm_node);
2623                         break;
2624                 }
2625                 i40iw_cleanup_retrans_entry(cm_node);
2626                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2627                 i40iw_send_ack(cm_node);        /* ACK  for the syn_ack */
2628                 ret = i40iw_send_mpa_request(cm_node);
2629                 if (ret) {
2630                         i40iw_debug(cm_node->dev,
2631                                     I40IW_DEBUG_CM,
2632                                     "cm_node=%p i40iw_send_mpa_request failed\n",
2633                                     cm_node);
2634                         break;
2635                 }
2636                 cm_node->state = I40IW_CM_STATE_MPAREQ_SENT;
2637                 break;
2638         case I40IW_CM_STATE_MPAREQ_RCVD:
2639                 i40iw_passive_open_err(cm_node, true);
2640                 break;
2641         case I40IW_CM_STATE_LISTENING:
2642                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2643                 i40iw_cleanup_retrans_entry(cm_node);
2644                 cm_node->state = I40IW_CM_STATE_CLOSED;
2645                 i40iw_send_reset(cm_node);
2646                 break;
2647         case I40IW_CM_STATE_CLOSED:
2648                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2649                 i40iw_cleanup_retrans_entry(cm_node);
2650                 atomic_inc(&cm_node->ref_count);
2651                 i40iw_send_reset(cm_node);
2652                 break;
2653         case I40IW_CM_STATE_ESTABLISHED:
2654         case I40IW_CM_STATE_FIN_WAIT1:
2655         case I40IW_CM_STATE_FIN_WAIT2:
2656         case I40IW_CM_STATE_LAST_ACK:
2657         case I40IW_CM_STATE_OFFLOADED:
2658         case I40IW_CM_STATE_CLOSING:
2659         case I40IW_CM_STATE_UNKNOWN:
2660         case I40IW_CM_STATE_MPAREQ_SENT:
2661         default:
2662                 break;
2663         }
2664 }
2665
2666 /**
2667  * i40iw_handle_ack_pkt - process packet with ACK
2668  * @cm_node: connection's node
2669  * @rbuf: receive buffer
2670  */
2671 static int i40iw_handle_ack_pkt(struct i40iw_cm_node *cm_node,
2672                                 struct i40iw_puda_buf *rbuf)
2673 {
2674         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2675         u32 inc_sequence;
2676         int ret = 0;
2677         int optionsize;
2678         u32 datasize = rbuf->datalen;
2679
2680         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2681
2682         if (i40iw_check_seq(cm_node, tcph))
2683                 return -EINVAL;
2684
2685         inc_sequence = ntohl(tcph->seq);
2686         switch (cm_node->state) {
2687         case I40IW_CM_STATE_SYN_RCVD:
2688                 i40iw_cleanup_retrans_entry(cm_node);
2689                 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1);
2690                 if (ret)
2691                         break;
2692                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2693                 cm_node->state = I40IW_CM_STATE_ESTABLISHED;
2694                 if (datasize) {
2695                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2696                         i40iw_handle_rcv_mpa(cm_node, rbuf);
2697                 }
2698                 break;
2699         case I40IW_CM_STATE_ESTABLISHED:
2700                 i40iw_cleanup_retrans_entry(cm_node);
2701                 if (datasize) {
2702                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2703                         i40iw_handle_rcv_mpa(cm_node, rbuf);
2704                 }
2705                 break;
2706         case I40IW_CM_STATE_MPAREQ_SENT:
2707                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2708                 if (datasize) {
2709                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2710                         i40iw_handle_rcv_mpa(cm_node, rbuf);
2711                 }
2712                 break;
2713         case I40IW_CM_STATE_LISTENING:
2714                 i40iw_cleanup_retrans_entry(cm_node);
2715                 cm_node->state = I40IW_CM_STATE_CLOSED;
2716                 i40iw_send_reset(cm_node);
2717                 break;
2718         case I40IW_CM_STATE_CLOSED:
2719                 i40iw_cleanup_retrans_entry(cm_node);
2720                 atomic_inc(&cm_node->ref_count);
2721                 i40iw_send_reset(cm_node);
2722                 break;
2723         case I40IW_CM_STATE_LAST_ACK:
2724         case I40IW_CM_STATE_CLOSING:
2725                 i40iw_cleanup_retrans_entry(cm_node);
2726                 cm_node->state = I40IW_CM_STATE_CLOSED;
2727                 if (!cm_node->accept_pend)
2728                         cm_node->cm_id->rem_ref(cm_node->cm_id);
2729                 i40iw_rem_ref_cm_node(cm_node);
2730                 break;
2731         case I40IW_CM_STATE_FIN_WAIT1:
2732                 i40iw_cleanup_retrans_entry(cm_node);
2733                 cm_node->state = I40IW_CM_STATE_FIN_WAIT2;
2734                 break;
2735         case I40IW_CM_STATE_SYN_SENT:
2736         case I40IW_CM_STATE_FIN_WAIT2:
2737         case I40IW_CM_STATE_OFFLOADED:
2738         case I40IW_CM_STATE_MPAREQ_RCVD:
2739         case I40IW_CM_STATE_UNKNOWN:
2740         default:
2741                 i40iw_cleanup_retrans_entry(cm_node);
2742                 break;
2743         }
2744         return ret;
2745 }
2746
2747 /**
2748  * i40iw_process_packet - process cm packet
2749  * @cm_node: connection's node
2750  * @rbuf: receive buffer
2751  */
2752 static void i40iw_process_packet(struct i40iw_cm_node *cm_node,
2753                                  struct i40iw_puda_buf *rbuf)
2754 {
2755         enum i40iw_tcpip_pkt_type pkt_type = I40IW_PKT_TYPE_UNKNOWN;
2756         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2757         u32 fin_set = 0;
2758         int ret;
2759
2760         if (tcph->rst) {
2761                 pkt_type = I40IW_PKT_TYPE_RST;
2762         } else if (tcph->syn) {
2763                 pkt_type = I40IW_PKT_TYPE_SYN;
2764                 if (tcph->ack)
2765                         pkt_type = I40IW_PKT_TYPE_SYNACK;
2766         } else if (tcph->ack) {
2767                 pkt_type = I40IW_PKT_TYPE_ACK;
2768         }
2769         if (tcph->fin)
2770                 fin_set = 1;
2771
2772         switch (pkt_type) {
2773         case I40IW_PKT_TYPE_SYN:
2774                 i40iw_handle_syn_pkt(cm_node, rbuf);
2775                 break;
2776         case I40IW_PKT_TYPE_SYNACK:
2777                 i40iw_handle_synack_pkt(cm_node, rbuf);
2778                 break;
2779         case I40IW_PKT_TYPE_ACK:
2780                 ret = i40iw_handle_ack_pkt(cm_node, rbuf);
2781                 if (fin_set && !ret)
2782                         i40iw_handle_fin_pkt(cm_node);
2783                 break;
2784         case I40IW_PKT_TYPE_RST:
2785                 i40iw_handle_rst_pkt(cm_node, rbuf);
2786                 break;
2787         default:
2788                 if (fin_set &&
2789                     (!i40iw_check_seq(cm_node, (struct tcphdr *)rbuf->tcph)))
2790                         i40iw_handle_fin_pkt(cm_node);
2791                 break;
2792         }
2793 }
2794
2795 /**
2796  * i40iw_make_listen_node - create a listen node with params
2797  * @cm_core: cm's core
2798  * @iwdev: iwarp device structure
2799  * @cm_info: quad info for connection
2800  */
2801 static struct i40iw_cm_listener *i40iw_make_listen_node(
2802                                         struct i40iw_cm_core *cm_core,
2803                                         struct i40iw_device *iwdev,
2804                                         struct i40iw_cm_info *cm_info)
2805 {
2806         struct i40iw_cm_listener *listener;
2807         unsigned long flags;
2808
2809         /* cannot have multiple matching listeners */
2810         listener = i40iw_find_listener(cm_core, cm_info->loc_addr,
2811                                        cm_info->loc_port,
2812                                        cm_info->vlan_id,
2813                                        I40IW_CM_LISTENER_EITHER_STATE);
2814         if (listener &&
2815             (listener->listener_state == I40IW_CM_LISTENER_ACTIVE_STATE)) {
2816                 atomic_dec(&listener->ref_count);
2817                 i40iw_debug(cm_core->dev,
2818                             I40IW_DEBUG_CM,
2819                             "Not creating listener since it already exists\n");
2820                 return NULL;
2821         }
2822
2823         if (!listener) {
2824                 /* create a CM listen node (1/2 node to compare incoming traffic to) */
2825                 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
2826                 if (!listener)
2827                         return NULL;
2828                 cm_core->stats_listen_nodes_created++;
2829                 memcpy(listener->loc_addr, cm_info->loc_addr, sizeof(listener->loc_addr));
2830                 listener->loc_port = cm_info->loc_port;
2831
2832                 INIT_LIST_HEAD(&listener->child_listen_list);
2833
2834                 atomic_set(&listener->ref_count, 1);
2835         } else {
2836                 listener->reused_node = 1;
2837         }
2838
2839         listener->cm_id = cm_info->cm_id;
2840         listener->ipv4 = cm_info->ipv4;
2841         listener->vlan_id = cm_info->vlan_id;
2842         atomic_set(&listener->pend_accepts_cnt, 0);
2843         listener->cm_core = cm_core;
2844         listener->iwdev = iwdev;
2845
2846         listener->backlog = cm_info->backlog;
2847         listener->listener_state = I40IW_CM_LISTENER_ACTIVE_STATE;
2848
2849         if (!listener->reused_node) {
2850                 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2851                 list_add(&listener->list, &cm_core->listen_nodes);
2852                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2853         }
2854
2855         return listener;
2856 }
2857
2858 /**
2859  * i40iw_create_cm_node - make a connection node with params
2860  * @cm_core: cm's core
2861  * @iwdev: iwarp device structure
2862  * @private_data_len: len to provate data for mpa request
2863  * @private_data: pointer to private data for connection
2864  * @cm_info: quad info for connection
2865  */
2866 static struct i40iw_cm_node *i40iw_create_cm_node(
2867                                         struct i40iw_cm_core *cm_core,
2868                                         struct i40iw_device *iwdev,
2869                                         u16 private_data_len,
2870                                         void *private_data,
2871                                         struct i40iw_cm_info *cm_info)
2872 {
2873         struct i40iw_cm_node *cm_node;
2874         struct i40iw_cm_listener *loopback_remotelistener;
2875         struct i40iw_cm_node *loopback_remotenode;
2876         struct i40iw_cm_info loopback_cm_info;
2877
2878         /* create a CM connection node */
2879         cm_node = i40iw_make_cm_node(cm_core, iwdev, cm_info, NULL);
2880         if (!cm_node)
2881                 return ERR_PTR(-ENOMEM);
2882         /* set our node side to client (active) side */
2883         cm_node->tcp_cntxt.client = 1;
2884         cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE;
2885
2886         if (!memcmp(cm_info->loc_addr, cm_info->rem_addr, sizeof(cm_info->loc_addr))) {
2887                 loopback_remotelistener = i40iw_find_listener(
2888                                                 cm_core,
2889                                                 cm_info->rem_addr,
2890                                                 cm_node->rem_port,
2891                                                 cm_node->vlan_id,
2892                                                 I40IW_CM_LISTENER_ACTIVE_STATE);
2893                 if (!loopback_remotelistener) {
2894                         i40iw_rem_ref_cm_node(cm_node);
2895                         return ERR_PTR(-ECONNREFUSED);
2896                 } else {
2897                         loopback_cm_info = *cm_info;
2898                         loopback_cm_info.loc_port = cm_info->rem_port;
2899                         loopback_cm_info.rem_port = cm_info->loc_port;
2900                         loopback_cm_info.cm_id = loopback_remotelistener->cm_id;
2901                         loopback_cm_info.ipv4 = cm_info->ipv4;
2902                         loopback_remotenode = i40iw_make_cm_node(cm_core,
2903                                                                  iwdev,
2904                                                                  &loopback_cm_info,
2905                                                                  loopback_remotelistener);
2906                         if (!loopback_remotenode) {
2907                                 i40iw_rem_ref_cm_node(cm_node);
2908                                 return ERR_PTR(-ENOMEM);
2909                         }
2910                         cm_core->stats_loopbacks++;
2911                         loopback_remotenode->loopbackpartner = cm_node;
2912                         loopback_remotenode->tcp_cntxt.rcv_wscale =
2913                                 I40IW_CM_DEFAULT_RCV_WND_SCALE;
2914                         cm_node->loopbackpartner = loopback_remotenode;
2915                         memcpy(loopback_remotenode->pdata_buf, private_data,
2916                                private_data_len);
2917                         loopback_remotenode->pdata.size = private_data_len;
2918
2919                         cm_node->state = I40IW_CM_STATE_OFFLOADED;
2920                         cm_node->tcp_cntxt.rcv_nxt =
2921                                 loopback_remotenode->tcp_cntxt.loc_seq_num;
2922                         loopback_remotenode->tcp_cntxt.rcv_nxt =
2923                                 cm_node->tcp_cntxt.loc_seq_num;
2924                         cm_node->tcp_cntxt.max_snd_wnd =
2925                                 loopback_remotenode->tcp_cntxt.rcv_wnd;
2926                         loopback_remotenode->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
2927                         cm_node->tcp_cntxt.snd_wnd = loopback_remotenode->tcp_cntxt.rcv_wnd;
2928                         loopback_remotenode->tcp_cntxt.snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
2929                         cm_node->tcp_cntxt.snd_wscale = loopback_remotenode->tcp_cntxt.rcv_wscale;
2930                         loopback_remotenode->tcp_cntxt.snd_wscale = cm_node->tcp_cntxt.rcv_wscale;
2931                         loopback_remotenode->state = I40IW_CM_STATE_MPAREQ_RCVD;
2932                         i40iw_create_event(loopback_remotenode, I40IW_CM_EVENT_MPA_REQ);
2933                 }
2934                 return cm_node;
2935         }
2936
2937         cm_node->pdata.size = private_data_len;
2938         cm_node->pdata.addr = cm_node->pdata_buf;
2939
2940         memcpy(cm_node->pdata_buf, private_data, private_data_len);
2941
2942         cm_node->state = I40IW_CM_STATE_SYN_SENT;
2943         return cm_node;
2944 }
2945
2946 /**
2947  * i40iw_cm_reject - reject and teardown a connection
2948  * @cm_node: connection's node
2949  * @pdate: ptr to private data for reject
2950  * @plen: size of private data
2951  */
2952 static int i40iw_cm_reject(struct i40iw_cm_node *cm_node, const void *pdata, u8 plen)
2953 {
2954         int ret = 0;
2955         int err;
2956         int passive_state;
2957         struct iw_cm_id *cm_id = cm_node->cm_id;
2958         struct i40iw_cm_node *loopback = cm_node->loopbackpartner;
2959
2960         if (cm_node->tcp_cntxt.client)
2961                 return ret;
2962         i40iw_cleanup_retrans_entry(cm_node);
2963
2964         if (!loopback) {
2965                 passive_state = atomic_add_return(1, &cm_node->passive_state);
2966                 if (passive_state == I40IW_SEND_RESET_EVENT) {
2967                         cm_node->state = I40IW_CM_STATE_CLOSED;
2968                         i40iw_rem_ref_cm_node(cm_node);
2969                 } else {
2970                         if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
2971                                 i40iw_rem_ref_cm_node(cm_node);
2972                         } else {
2973                                 ret = i40iw_send_mpa_reject(cm_node, pdata, plen);
2974                                 if (ret) {
2975                                         cm_node->state = I40IW_CM_STATE_CLOSED;
2976                                         err = i40iw_send_reset(cm_node);
2977                                         if (err)
2978                                                 i40iw_pr_err("send reset failed\n");
2979                                 } else {
2980                                         cm_id->add_ref(cm_id);
2981                                 }
2982                         }
2983                 }
2984         } else {
2985                 cm_node->cm_id = NULL;
2986                 if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
2987                         i40iw_rem_ref_cm_node(cm_node);
2988                         i40iw_rem_ref_cm_node(loopback);
2989                 } else {
2990                         ret = i40iw_send_cm_event(loopback,
2991                                                   loopback->cm_id,
2992                                                   IW_CM_EVENT_CONNECT_REPLY,
2993                                                   -ECONNREFUSED);
2994                         i40iw_rem_ref_cm_node(cm_node);
2995                         loopback->state = I40IW_CM_STATE_CLOSING;
2996
2997                         cm_id = loopback->cm_id;
2998                         i40iw_rem_ref_cm_node(loopback);
2999                         cm_id->rem_ref(cm_id);
3000                 }
3001         }
3002
3003         return ret;
3004 }
3005
3006 /**
3007  * i40iw_cm_close - close of cm connection
3008  * @cm_node: connection's node
3009  */
3010 static int i40iw_cm_close(struct i40iw_cm_node *cm_node)
3011 {
3012         int ret = 0;
3013
3014         if (!cm_node)
3015                 return -EINVAL;
3016
3017         switch (cm_node->state) {
3018         case I40IW_CM_STATE_SYN_RCVD:
3019         case I40IW_CM_STATE_SYN_SENT:
3020         case I40IW_CM_STATE_ONE_SIDE_ESTABLISHED:
3021         case I40IW_CM_STATE_ESTABLISHED:
3022         case I40IW_CM_STATE_ACCEPTING:
3023         case I40IW_CM_STATE_MPAREQ_SENT:
3024         case I40IW_CM_STATE_MPAREQ_RCVD:
3025                 i40iw_cleanup_retrans_entry(cm_node);
3026                 i40iw_send_reset(cm_node);
3027                 break;
3028         case I40IW_CM_STATE_CLOSE_WAIT:
3029                 cm_node->state = I40IW_CM_STATE_LAST_ACK;
3030                 i40iw_send_fin(cm_node);
3031                 break;
3032         case I40IW_CM_STATE_FIN_WAIT1:
3033         case I40IW_CM_STATE_FIN_WAIT2:
3034         case I40IW_CM_STATE_LAST_ACK:
3035         case I40IW_CM_STATE_TIME_WAIT:
3036         case I40IW_CM_STATE_CLOSING:
3037                 ret = -1;
3038                 break;
3039         case I40IW_CM_STATE_LISTENING:
3040                 i40iw_cleanup_retrans_entry(cm_node);
3041                 i40iw_send_reset(cm_node);
3042                 break;
3043         case I40IW_CM_STATE_MPAREJ_RCVD:
3044         case I40IW_CM_STATE_UNKNOWN:
3045         case I40IW_CM_STATE_INITED:
3046         case I40IW_CM_STATE_CLOSED:
3047         case I40IW_CM_STATE_LISTENER_DESTROYED:
3048                 i40iw_rem_ref_cm_node(cm_node);
3049                 break;
3050         case I40IW_CM_STATE_OFFLOADED:
3051                 if (cm_node->send_entry)
3052                         i40iw_pr_err("send_entry\n");
3053                 i40iw_rem_ref_cm_node(cm_node);
3054                 break;
3055         }
3056         return ret;
3057 }
3058
3059 /**
3060  * i40iw_receive_ilq - recv an ETHERNET packet, and process it
3061  * through CM
3062  * @vsi: pointer to the vsi structure
3063  * @rbuf: receive buffer
3064  */
3065 void i40iw_receive_ilq(struct i40iw_sc_vsi *vsi, struct i40iw_puda_buf *rbuf)
3066 {
3067         struct i40iw_cm_node *cm_node;
3068         struct i40iw_cm_listener *listener;
3069         struct iphdr *iph;
3070         struct ipv6hdr *ip6h;
3071         struct tcphdr *tcph;
3072         struct i40iw_cm_info cm_info;
3073         struct i40iw_sc_dev *dev = vsi->dev;
3074         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
3075         struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3076         struct vlan_ethhdr *ethh;
3077         u16 vtag;
3078
3079         /* if vlan, then maclen = 18 else 14 */
3080         iph = (struct iphdr *)rbuf->iph;
3081         memset(&cm_info, 0, sizeof(cm_info));
3082
3083         i40iw_debug_buf(dev,
3084                         I40IW_DEBUG_ILQ,
3085                         "RECEIVE ILQ BUFFER",
3086                         rbuf->mem.va,
3087                         rbuf->totallen);
3088         ethh = (struct vlan_ethhdr *)rbuf->mem.va;
3089
3090         if (ethh->h_vlan_proto == htons(ETH_P_8021Q)) {
3091                 vtag = ntohs(ethh->h_vlan_TCI);
3092                 cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
3093                 cm_info.vlan_id = vtag & VLAN_VID_MASK;
3094                 i40iw_debug(cm_core->dev,
3095                             I40IW_DEBUG_CM,
3096                             "%s vlan_id=%d\n",
3097                             __func__,
3098                             cm_info.vlan_id);
3099         } else {
3100                 cm_info.vlan_id = I40IW_NO_VLAN;
3101         }
3102         tcph = (struct tcphdr *)rbuf->tcph;
3103
3104         if (rbuf->ipv4) {
3105                 cm_info.loc_addr[0] = ntohl(iph->daddr);
3106                 cm_info.rem_addr[0] = ntohl(iph->saddr);
3107                 cm_info.ipv4 = true;
3108                 cm_info.tos = iph->tos;
3109         } else {
3110                 ip6h = (struct ipv6hdr *)rbuf->iph;
3111                 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3112                                     ip6h->daddr.in6_u.u6_addr32);
3113                 i40iw_copy_ip_ntohl(cm_info.rem_addr,
3114                                     ip6h->saddr.in6_u.u6_addr32);
3115                 cm_info.ipv4 = false;
3116                 cm_info.tos = (ip6h->priority << 4) | (ip6h->flow_lbl[0] >> 4);
3117         }
3118         cm_info.loc_port = ntohs(tcph->dest);
3119         cm_info.rem_port = ntohs(tcph->source);
3120         cm_node = i40iw_find_node(cm_core,
3121                                   cm_info.rem_port,
3122                                   cm_info.rem_addr,
3123                                   cm_info.loc_port,
3124                                   cm_info.loc_addr,
3125                                   true);
3126
3127         if (!cm_node) {
3128                 /* Only type of packet accepted are for */
3129                 /* the PASSIVE open (syn only) */
3130                 if (!tcph->syn || tcph->ack)
3131                         return;
3132                 listener =
3133                     i40iw_find_listener(cm_core,
3134                                         cm_info.loc_addr,
3135                                         cm_info.loc_port,
3136                                         cm_info.vlan_id,
3137                                         I40IW_CM_LISTENER_ACTIVE_STATE);
3138                 if (!listener) {
3139                         cm_info.cm_id = NULL;
3140                         i40iw_debug(cm_core->dev,
3141                                     I40IW_DEBUG_CM,
3142                                     "%s no listener found\n",
3143                                     __func__);
3144                         return;
3145                 }
3146                 cm_info.cm_id = listener->cm_id;
3147                 cm_node = i40iw_make_cm_node(cm_core, iwdev, &cm_info, listener);
3148                 if (!cm_node) {
3149                         i40iw_debug(cm_core->dev,
3150                                     I40IW_DEBUG_CM,
3151                                     "%s allocate node failed\n",
3152                                     __func__);
3153                         atomic_dec(&listener->ref_count);
3154                         return;
3155                 }
3156                 if (!tcph->rst && !tcph->fin) {
3157                         cm_node->state = I40IW_CM_STATE_LISTENING;
3158                 } else {
3159                         i40iw_rem_ref_cm_node(cm_node);
3160                         return;
3161                 }
3162                 atomic_inc(&cm_node->ref_count);
3163         } else if (cm_node->state == I40IW_CM_STATE_OFFLOADED) {
3164                 i40iw_rem_ref_cm_node(cm_node);
3165                 return;
3166         }
3167         i40iw_process_packet(cm_node, rbuf);
3168         i40iw_rem_ref_cm_node(cm_node);
3169 }
3170
3171 /**
3172  * i40iw_setup_cm_core - allocate a top level instance of a cm
3173  * core
3174  * @iwdev: iwarp device structure
3175  */
3176 void i40iw_setup_cm_core(struct i40iw_device *iwdev)
3177 {
3178         struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3179
3180         cm_core->iwdev = iwdev;
3181         cm_core->dev = &iwdev->sc_dev;
3182
3183         INIT_LIST_HEAD(&cm_core->connected_nodes);
3184         INIT_LIST_HEAD(&cm_core->listen_nodes);
3185
3186         setup_timer(&cm_core->tcp_timer, i40iw_cm_timer_tick,
3187                     (unsigned long)cm_core);
3188
3189         spin_lock_init(&cm_core->ht_lock);
3190         spin_lock_init(&cm_core->listen_list_lock);
3191
3192         cm_core->event_wq = alloc_ordered_workqueue("iwewq",
3193                                                     WQ_MEM_RECLAIM);
3194
3195         cm_core->disconn_wq = alloc_ordered_workqueue("iwdwq",
3196                                                       WQ_MEM_RECLAIM);
3197 }
3198
3199 /**
3200  * i40iw_cleanup_cm_core - deallocate a top level instance of a
3201  * cm core
3202  * @cm_core: cm's core
3203  */
3204 void i40iw_cleanup_cm_core(struct i40iw_cm_core *cm_core)
3205 {
3206         unsigned long flags;
3207
3208         if (!cm_core)
3209                 return;
3210
3211         spin_lock_irqsave(&cm_core->ht_lock, flags);
3212         if (timer_pending(&cm_core->tcp_timer))
3213                 del_timer_sync(&cm_core->tcp_timer);
3214         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
3215
3216         destroy_workqueue(cm_core->event_wq);
3217         destroy_workqueue(cm_core->disconn_wq);
3218 }
3219
3220 /**
3221  * i40iw_init_tcp_ctx - setup qp context
3222  * @cm_node: connection's node
3223  * @tcp_info: offload info for tcp
3224  * @iwqp: associate qp for the connection
3225  */
3226 static void i40iw_init_tcp_ctx(struct i40iw_cm_node *cm_node,
3227                                struct i40iw_tcp_offload_info *tcp_info,
3228                                struct i40iw_qp *iwqp)
3229 {
3230         tcp_info->ipv4 = cm_node->ipv4;
3231         tcp_info->drop_ooo_seg = true;
3232         tcp_info->wscale = true;
3233         tcp_info->ignore_tcp_opt = true;
3234         tcp_info->ignore_tcp_uns_opt = true;
3235         tcp_info->no_nagle = false;
3236
3237         tcp_info->ttl = I40IW_DEFAULT_TTL;
3238         tcp_info->rtt_var = cpu_to_le32(I40IW_DEFAULT_RTT_VAR);
3239         tcp_info->ss_thresh = cpu_to_le32(I40IW_DEFAULT_SS_THRESH);
3240         tcp_info->rexmit_thresh = I40IW_DEFAULT_REXMIT_THRESH;
3241
3242         tcp_info->tcp_state = I40IW_TCP_STATE_ESTABLISHED;
3243         tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale;
3244         tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale;
3245
3246         tcp_info->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3247         tcp_info->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
3248         tcp_info->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
3249         tcp_info->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3250
3251         tcp_info->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3252         tcp_info->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss);
3253         tcp_info->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
3254         tcp_info->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3255         tcp_info->max_snd_window = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
3256         tcp_info->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
3257                                         cm_node->tcp_cntxt.rcv_wscale);
3258
3259         tcp_info->flow_label = 0;
3260         tcp_info->snd_mss = cpu_to_le32(((u32)cm_node->tcp_cntxt.mss));
3261         if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
3262                 tcp_info->insert_vlan_tag = true;
3263                 tcp_info->vlan_tag = cpu_to_le16(cm_node->vlan_id);
3264         }
3265         if (cm_node->ipv4) {
3266                 tcp_info->src_port = cpu_to_le16(cm_node->loc_port);
3267                 tcp_info->dst_port = cpu_to_le16(cm_node->rem_port);
3268
3269                 tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[0]);
3270                 tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[0]);
3271                 tcp_info->arp_idx =
3272                         cpu_to_le16((u16)i40iw_arp_table(
3273                                                          iwqp->iwdev,
3274                                                          &tcp_info->dest_ip_addr3,
3275                                                          true,
3276                                                          NULL,
3277                                                          I40IW_ARP_RESOLVE));
3278         } else {
3279                 tcp_info->src_port = cpu_to_le16(cm_node->loc_port);
3280                 tcp_info->dst_port = cpu_to_le16(cm_node->rem_port);
3281                 tcp_info->dest_ip_addr0 = cpu_to_le32(cm_node->rem_addr[0]);
3282                 tcp_info->dest_ip_addr1 = cpu_to_le32(cm_node->rem_addr[1]);
3283                 tcp_info->dest_ip_addr2 = cpu_to_le32(cm_node->rem_addr[2]);
3284                 tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[3]);
3285                 tcp_info->local_ipaddr0 = cpu_to_le32(cm_node->loc_addr[0]);
3286                 tcp_info->local_ipaddr1 = cpu_to_le32(cm_node->loc_addr[1]);
3287                 tcp_info->local_ipaddr2 = cpu_to_le32(cm_node->loc_addr[2]);
3288                 tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[3]);
3289                 tcp_info->arp_idx =
3290                         cpu_to_le16((u16)i40iw_arp_table(
3291                                                          iwqp->iwdev,
3292                                                          &tcp_info->dest_ip_addr0,
3293                                                          false,
3294                                                          NULL,
3295                                                          I40IW_ARP_RESOLVE));
3296         }
3297 }
3298
3299 /**
3300  * i40iw_cm_init_tsa_conn - setup qp for RTS
3301  * @iwqp: associate qp for the connection
3302  * @cm_node: connection's node
3303  */
3304 static void i40iw_cm_init_tsa_conn(struct i40iw_qp *iwqp,
3305                                    struct i40iw_cm_node *cm_node)
3306 {
3307         struct i40iw_tcp_offload_info tcp_info;
3308         struct i40iwarp_offload_info *iwarp_info;
3309         struct i40iw_qp_host_ctx_info *ctx_info;
3310         struct i40iw_device *iwdev = iwqp->iwdev;
3311         struct i40iw_sc_dev *dev = &iwqp->iwdev->sc_dev;
3312
3313         memset(&tcp_info, 0x00, sizeof(struct i40iw_tcp_offload_info));
3314         iwarp_info = &iwqp->iwarp_info;
3315         ctx_info = &iwqp->ctx_info;
3316
3317         ctx_info->tcp_info = &tcp_info;
3318         ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id;
3319         ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id;
3320
3321         iwarp_info->ord_size = cm_node->ord_size;
3322         iwarp_info->ird_size = i40iw_derive_hw_ird_setting(cm_node->ird_size);
3323
3324         if (iwarp_info->ord_size == 1)
3325                 iwarp_info->ord_size = 2;
3326
3327         iwarp_info->rd_enable = true;
3328         iwarp_info->rdmap_ver = 1;
3329         iwarp_info->ddp_ver = 1;
3330
3331         iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id;
3332
3333         ctx_info->tcp_info_valid = true;
3334         ctx_info->iwarp_info_valid = true;
3335         ctx_info->add_to_qoslist = true;
3336         ctx_info->user_pri = cm_node->user_pri;
3337
3338         i40iw_init_tcp_ctx(cm_node, &tcp_info, iwqp);
3339         if (cm_node->snd_mark_en) {
3340                 iwarp_info->snd_mark_en = true;
3341                 iwarp_info->snd_mark_offset = (tcp_info.snd_nxt &
3342                                 SNDMARKER_SEQNMASK) + cm_node->lsmm_size;
3343         }
3344
3345         cm_node->state = I40IW_CM_STATE_OFFLOADED;
3346         tcp_info.tcp_state = I40IW_TCP_STATE_ESTABLISHED;
3347         tcp_info.src_mac_addr_idx = iwdev->mac_ip_table_idx;
3348         tcp_info.tos = cm_node->tos;
3349
3350         dev->iw_priv_qp_ops->qp_setctx(&iwqp->sc_qp, (u64 *)(iwqp->host_ctx.va), ctx_info);
3351
3352         /* once tcp_info is set, no need to do it again */
3353         ctx_info->tcp_info_valid = false;
3354         ctx_info->iwarp_info_valid = false;
3355         ctx_info->add_to_qoslist = false;
3356 }
3357
3358 /**
3359  * i40iw_cm_disconn - when a connection is being closed
3360  * @iwqp: associate qp for the connection
3361  */
3362 void i40iw_cm_disconn(struct i40iw_qp *iwqp)
3363 {
3364         struct disconn_work *work;
3365         struct i40iw_device *iwdev = iwqp->iwdev;
3366         struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3367         unsigned long flags;
3368
3369         work = kzalloc(sizeof(*work), GFP_ATOMIC);
3370         if (!work)
3371                 return; /* Timer will clean up */
3372
3373         spin_lock_irqsave(&iwdev->qptable_lock, flags);
3374         if (!iwdev->qp_table[iwqp->ibqp.qp_num]) {
3375                 spin_unlock_irqrestore(&iwdev->qptable_lock, flags);
3376                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM,
3377                             "%s qp_id %d is already freed\n",
3378                              __func__, iwqp->ibqp.qp_num);
3379                 kfree(work);
3380                 return;
3381         }
3382         i40iw_add_ref(&iwqp->ibqp);
3383         spin_unlock_irqrestore(&iwdev->qptable_lock, flags);
3384
3385         work->iwqp = iwqp;
3386         INIT_WORK(&work->work, i40iw_disconnect_worker);
3387         queue_work(cm_core->disconn_wq, &work->work);
3388         return;
3389 }
3390
3391 /**
3392  * i40iw_qp_disconnect - free qp and close cm
3393  * @iwqp: associate qp for the connection
3394  */
3395 static void i40iw_qp_disconnect(struct i40iw_qp *iwqp)
3396 {
3397         struct i40iw_device *iwdev;
3398         struct i40iw_ib_device *iwibdev;
3399
3400         iwdev = to_iwdev(iwqp->ibqp.device);
3401         if (!iwdev) {
3402                 i40iw_pr_err("iwdev == NULL\n");
3403                 return;
3404         }
3405
3406         iwibdev = iwdev->iwibdev;
3407
3408         if (iwqp->active_conn) {
3409                 /* indicate this connection is NOT active */
3410                 iwqp->active_conn = 0;
3411         } else {
3412                 /* Need to free the Last Streaming Mode Message */
3413                 if (iwqp->ietf_mem.va) {
3414                         if (iwqp->lsmm_mr)
3415                                 iwibdev->ibdev.dereg_mr(iwqp->lsmm_mr);
3416                         i40iw_free_dma_mem(iwdev->sc_dev.hw, &iwqp->ietf_mem);
3417                 }
3418         }
3419
3420         /* close the CM node down if it is still active */
3421         if (iwqp->cm_node) {
3422                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "%s Call close API\n", __func__);
3423                 i40iw_cm_close(iwqp->cm_node);
3424         }
3425 }
3426
3427 /**
3428  * i40iw_cm_disconn_true - called by worker thread to disconnect qp
3429  * @iwqp: associate qp for the connection
3430  */
3431 static void i40iw_cm_disconn_true(struct i40iw_qp *iwqp)
3432 {
3433         struct iw_cm_id *cm_id;
3434         struct i40iw_device *iwdev;
3435         struct i40iw_sc_qp *qp = &iwqp->sc_qp;
3436         u16 last_ae;
3437         u8 original_hw_tcp_state;
3438         u8 original_ibqp_state;
3439         int disconn_status = 0;
3440         int issue_disconn = 0;
3441         int issue_close = 0;
3442         int issue_flush = 0;
3443         struct ib_event ibevent;
3444         unsigned long flags;
3445         int ret;
3446
3447         if (!iwqp) {
3448                 i40iw_pr_err("iwqp == NULL\n");
3449                 return;
3450         }
3451
3452         spin_lock_irqsave(&iwqp->lock, flags);
3453         cm_id = iwqp->cm_id;
3454         /* make sure we havent already closed this connection */
3455         if (!cm_id) {
3456                 spin_unlock_irqrestore(&iwqp->lock, flags);
3457                 return;
3458         }
3459
3460         iwdev = to_iwdev(iwqp->ibqp.device);
3461
3462         original_hw_tcp_state = iwqp->hw_tcp_state;
3463         original_ibqp_state = iwqp->ibqp_state;
3464         last_ae = iwqp->last_aeq;
3465
3466         if (qp->term_flags) {
3467                 issue_disconn = 1;
3468                 issue_close = 1;
3469                 iwqp->cm_id = NULL;
3470                 /*When term timer expires after cm_timer, don't want
3471                  *terminate-handler to issue cm_disconn which can re-free
3472                  *a QP even after its refcnt=0.
3473                  */
3474                 i40iw_terminate_del_timer(qp);
3475                 if (!iwqp->flush_issued) {
3476                         iwqp->flush_issued = 1;
3477                         issue_flush = 1;
3478                 }
3479         } else if ((original_hw_tcp_state == I40IW_TCP_STATE_CLOSE_WAIT) ||
3480                    ((original_ibqp_state == IB_QPS_RTS) &&
3481                     (last_ae == I40IW_AE_LLP_CONNECTION_RESET))) {
3482                 issue_disconn = 1;
3483                 if (last_ae == I40IW_AE_LLP_CONNECTION_RESET)
3484                         disconn_status = -ECONNRESET;
3485         }
3486
3487         if (((original_hw_tcp_state == I40IW_TCP_STATE_CLOSED) ||
3488              (original_hw_tcp_state == I40IW_TCP_STATE_TIME_WAIT) ||
3489              (last_ae == I40IW_AE_RDMAP_ROE_BAD_LLP_CLOSE) ||
3490              (last_ae == I40IW_AE_LLP_CONNECTION_RESET) ||
3491               iwdev->reset)) {
3492                 issue_close = 1;
3493                 iwqp->cm_id = NULL;
3494                 if (!iwqp->flush_issued) {
3495                         iwqp->flush_issued = 1;
3496                         issue_flush = 1;
3497                 }
3498         }
3499
3500         spin_unlock_irqrestore(&iwqp->lock, flags);
3501         if (issue_flush && !iwqp->destroyed) {
3502                 /* Flush the queues */
3503                 i40iw_flush_wqes(iwdev, iwqp);
3504
3505                 if (qp->term_flags && iwqp->ibqp.event_handler) {
3506                         ibevent.device = iwqp->ibqp.device;
3507                         ibevent.event = (qp->eventtype == TERM_EVENT_QP_FATAL) ?
3508                                         IB_EVENT_QP_FATAL : IB_EVENT_QP_ACCESS_ERR;
3509                         ibevent.element.qp = &iwqp->ibqp;
3510                         iwqp->ibqp.event_handler(&ibevent, iwqp->ibqp.qp_context);
3511                 }
3512         }
3513
3514         if (cm_id && cm_id->event_handler) {
3515                 if (issue_disconn) {
3516                         ret = i40iw_send_cm_event(NULL,
3517                                                   cm_id,
3518                                                   IW_CM_EVENT_DISCONNECT,
3519                                                   disconn_status);
3520
3521                         if (ret)
3522                                 i40iw_debug(&iwdev->sc_dev,
3523                                             I40IW_DEBUG_CM,
3524                                             "disconnect event failed %s: - cm_id = %p\n",
3525                                             __func__, cm_id);
3526                 }
3527                 if (issue_close) {
3528                         i40iw_qp_disconnect(iwqp);
3529                         cm_id->provider_data = iwqp;
3530                         ret = i40iw_send_cm_event(NULL, cm_id, IW_CM_EVENT_CLOSE, 0);
3531                         if (ret)
3532                                 i40iw_debug(&iwdev->sc_dev,
3533                                             I40IW_DEBUG_CM,
3534                                             "close event failed %s: - cm_id = %p\n",
3535                                             __func__, cm_id);
3536                         cm_id->rem_ref(cm_id);
3537                 }
3538         }
3539 }
3540
3541 /**
3542  * i40iw_disconnect_worker - worker for connection close
3543  * @work: points or disconn structure
3544  */
3545 static void i40iw_disconnect_worker(struct work_struct *work)
3546 {
3547         struct disconn_work *dwork = container_of(work, struct disconn_work, work);
3548         struct i40iw_qp *iwqp = dwork->iwqp;
3549
3550         kfree(dwork);
3551         i40iw_cm_disconn_true(iwqp);
3552         i40iw_rem_ref(&iwqp->ibqp);
3553 }
3554
3555 /**
3556  * i40iw_accept - registered call for connection to be accepted
3557  * @cm_id: cm information for passive connection
3558  * @conn_param: accpet parameters
3559  */
3560 int i40iw_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3561 {
3562         struct ib_qp *ibqp;
3563         struct i40iw_qp *iwqp;
3564         struct i40iw_device *iwdev;
3565         struct i40iw_sc_dev *dev;
3566         struct i40iw_cm_node *cm_node;
3567         struct ib_qp_attr attr;
3568         int passive_state;
3569         struct ib_mr *ibmr;
3570         struct i40iw_pd *iwpd;
3571         u16 buf_len = 0;
3572         struct i40iw_kmem_info accept;
3573         enum i40iw_status_code status;
3574         u64 tagged_offset;
3575
3576         memset(&attr, 0, sizeof(attr));
3577         ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn);
3578         if (!ibqp)
3579                 return -EINVAL;
3580
3581         iwqp = to_iwqp(ibqp);
3582         iwdev = iwqp->iwdev;
3583         dev = &iwdev->sc_dev;
3584         cm_node = (struct i40iw_cm_node *)cm_id->provider_data;
3585
3586         if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) {
3587                 cm_node->ipv4 = true;
3588                 cm_node->vlan_id = i40iw_get_vlan_ipv4(cm_node->loc_addr);
3589         } else {
3590                 cm_node->ipv4 = false;
3591                 i40iw_netdev_vlan_ipv6(cm_node->loc_addr, &cm_node->vlan_id, NULL);
3592         }
3593         i40iw_debug(cm_node->dev,
3594                     I40IW_DEBUG_CM,
3595                     "Accept vlan_id=%d\n",
3596                     cm_node->vlan_id);
3597         if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
3598                 if (cm_node->loopbackpartner)
3599                         i40iw_rem_ref_cm_node(cm_node->loopbackpartner);
3600                 i40iw_rem_ref_cm_node(cm_node);
3601                 return -EINVAL;
3602         }
3603
3604         passive_state = atomic_add_return(1, &cm_node->passive_state);
3605         if (passive_state == I40IW_SEND_RESET_EVENT) {
3606                 i40iw_rem_ref_cm_node(cm_node);
3607                 return -ECONNRESET;
3608         }
3609
3610         cm_node->cm_core->stats_accepts++;
3611         iwqp->cm_node = (void *)cm_node;
3612         cm_node->iwqp = iwqp;
3613
3614         buf_len = conn_param->private_data_len + I40IW_MAX_IETF_SIZE;
3615
3616         status = i40iw_allocate_dma_mem(dev->hw, &iwqp->ietf_mem, buf_len, 1);
3617
3618         if (status)
3619                 return -ENOMEM;
3620         cm_node->pdata.size = conn_param->private_data_len;
3621         accept.addr = iwqp->ietf_mem.va;
3622         accept.size = i40iw_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY);
3623         memcpy(accept.addr + accept.size, conn_param->private_data,
3624                conn_param->private_data_len);
3625
3626         /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3627         if ((cm_node->ipv4 &&
3628              !i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
3629             (!cm_node->ipv4 &&
3630              !i40iw_ipv6_is_loopback(cm_node->loc_addr, cm_node->rem_addr))) {
3631                 iwpd = iwqp->iwpd;
3632                 tagged_offset = (uintptr_t)iwqp->ietf_mem.va;
3633                 ibmr = i40iw_reg_phys_mr(&iwpd->ibpd,
3634                                          iwqp->ietf_mem.pa,
3635                                          buf_len,
3636                                          IB_ACCESS_LOCAL_WRITE,
3637                                          &tagged_offset);
3638                 if (IS_ERR(ibmr)) {
3639                         i40iw_free_dma_mem(dev->hw, &iwqp->ietf_mem);
3640                         return -ENOMEM;
3641                 }
3642
3643                 ibmr->pd = &iwpd->ibpd;
3644                 ibmr->device = iwpd->ibpd.device;
3645                 iwqp->lsmm_mr = ibmr;
3646                 if (iwqp->page)
3647                         iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
3648                 dev->iw_priv_qp_ops->qp_send_lsmm(&iwqp->sc_qp,
3649                                                         iwqp->ietf_mem.va,
3650                                                         (accept.size + conn_param->private_data_len),
3651                                                         ibmr->lkey);
3652
3653         } else {
3654                 if (iwqp->page)
3655                         iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
3656                 dev->iw_priv_qp_ops->qp_send_lsmm(&iwqp->sc_qp, NULL, 0, 0);
3657         }
3658
3659         if (iwqp->page)
3660                 kunmap(iwqp->page);
3661
3662         iwqp->cm_id = cm_id;
3663         cm_node->cm_id = cm_id;
3664
3665         cm_id->provider_data = (void *)iwqp;
3666         iwqp->active_conn = 0;
3667
3668         cm_node->lsmm_size = accept.size + conn_param->private_data_len;
3669         i40iw_cm_init_tsa_conn(iwqp, cm_node);
3670         cm_id->add_ref(cm_id);
3671         i40iw_add_ref(&iwqp->ibqp);
3672
3673         i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0);
3674
3675         attr.qp_state = IB_QPS_RTS;
3676         cm_node->qhash_set = false;
3677         i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
3678         if (cm_node->loopbackpartner) {
3679                 cm_node->loopbackpartner->pdata.size = conn_param->private_data_len;
3680
3681                 /* copy entire MPA frame to our cm_node's frame */
3682                 memcpy(cm_node->loopbackpartner->pdata_buf,
3683                        conn_param->private_data,
3684                        conn_param->private_data_len);
3685                 i40iw_create_event(cm_node->loopbackpartner, I40IW_CM_EVENT_CONNECTED);
3686         }
3687
3688         cm_node->accelerated = 1;
3689         if (cm_node->accept_pend) {
3690                 if (!cm_node->listener)
3691                         i40iw_pr_err("cm_node->listener NULL for passive node\n");
3692                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
3693                 cm_node->accept_pend = 0;
3694         }
3695         return 0;
3696 }
3697
3698 /**
3699  * i40iw_reject - registered call for connection to be rejected
3700  * @cm_id: cm information for passive connection
3701  * @pdata: private data to be sent
3702  * @pdata_len: private data length
3703  */
3704 int i40iw_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3705 {
3706         struct i40iw_device *iwdev;
3707         struct i40iw_cm_node *cm_node;
3708         struct i40iw_cm_node *loopback;
3709
3710         cm_node = (struct i40iw_cm_node *)cm_id->provider_data;
3711         loopback = cm_node->loopbackpartner;
3712         cm_node->cm_id = cm_id;
3713         cm_node->pdata.size = pdata_len;
3714
3715         iwdev = to_iwdev(cm_id->device);
3716         if (!iwdev)
3717                 return -EINVAL;
3718         cm_node->cm_core->stats_rejects++;
3719
3720         if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER)
3721                 return -EINVAL;
3722
3723         if (loopback) {
3724                 memcpy(&loopback->pdata_buf, pdata, pdata_len);
3725                 loopback->pdata.size = pdata_len;
3726         }
3727
3728         return i40iw_cm_reject(cm_node, pdata, pdata_len);
3729 }
3730
3731 /**
3732  * i40iw_connect - registered call for connection to be established
3733  * @cm_id: cm information for passive connection
3734  * @conn_param: Information about the connection
3735  */
3736 int i40iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3737 {
3738         struct ib_qp *ibqp;
3739         struct i40iw_qp *iwqp;
3740         struct i40iw_device *iwdev;
3741         struct i40iw_cm_node *cm_node;
3742         struct i40iw_cm_info cm_info;
3743         struct sockaddr_in *laddr;
3744         struct sockaddr_in *raddr;
3745         struct sockaddr_in6 *laddr6;
3746         struct sockaddr_in6 *raddr6;
3747         bool qhash_set = false;
3748         int apbvt_set = 0;
3749         int err = 0;
3750         enum i40iw_status_code status;
3751
3752         ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn);
3753         if (!ibqp)
3754                 return -EINVAL;
3755         iwqp = to_iwqp(ibqp);
3756         if (!iwqp)
3757                 return -EINVAL;
3758         iwdev = to_iwdev(iwqp->ibqp.device);
3759         if (!iwdev)
3760                 return -EINVAL;
3761
3762         laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3763         raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
3764         laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3765         raddr6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr;
3766
3767         if (!(laddr->sin_port) || !(raddr->sin_port))
3768                 return -EINVAL;
3769
3770         iwqp->active_conn = 1;
3771         iwqp->cm_id = NULL;
3772         cm_id->provider_data = iwqp;
3773
3774         /* set up the connection params for the node */
3775         if (cm_id->remote_addr.ss_family == AF_INET) {
3776                 cm_info.ipv4 = true;
3777                 memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr));
3778                 memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr));
3779                 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3780                 cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr);
3781                 cm_info.loc_port = ntohs(laddr->sin_port);
3782                 cm_info.rem_port = ntohs(raddr->sin_port);
3783                 cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr);
3784         } else {
3785                 cm_info.ipv4 = false;
3786                 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3787                                     laddr6->sin6_addr.in6_u.u6_addr32);
3788                 i40iw_copy_ip_ntohl(cm_info.rem_addr,
3789                                     raddr6->sin6_addr.in6_u.u6_addr32);
3790                 cm_info.loc_port = ntohs(laddr6->sin6_port);
3791                 cm_info.rem_port = ntohs(raddr6->sin6_port);
3792                 i40iw_netdev_vlan_ipv6(cm_info.loc_addr, &cm_info.vlan_id, NULL);
3793         }
3794         cm_info.cm_id = cm_id;
3795         cm_info.tos = cm_id->tos;
3796         cm_info.user_pri = rt_tos2priority(cm_id->tos);
3797         i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB, "%s TOS:[%d] UP:[%d]\n",
3798                     __func__, cm_id->tos, cm_info.user_pri);
3799         if ((cm_info.ipv4 && (laddr->sin_addr.s_addr != raddr->sin_addr.s_addr)) ||
3800             (!cm_info.ipv4 && memcmp(laddr6->sin6_addr.in6_u.u6_addr32,
3801                                      raddr6->sin6_addr.in6_u.u6_addr32,
3802                                      sizeof(laddr6->sin6_addr.in6_u.u6_addr32)))) {
3803                 status = i40iw_manage_qhash(iwdev,
3804                                             &cm_info,
3805                                             I40IW_QHASH_TYPE_TCP_ESTABLISHED,
3806                                             I40IW_QHASH_MANAGE_TYPE_ADD,
3807                                             NULL,
3808                                             true);
3809                 if (status)
3810                         return -EINVAL;
3811                 qhash_set = true;
3812         }
3813         status = i40iw_manage_apbvt(iwdev, cm_info.loc_port, I40IW_MANAGE_APBVT_ADD);
3814         if (status) {
3815                 i40iw_manage_qhash(iwdev,
3816                                    &cm_info,
3817                                    I40IW_QHASH_TYPE_TCP_ESTABLISHED,
3818                                    I40IW_QHASH_MANAGE_TYPE_DELETE,
3819                                    NULL,
3820                                    false);
3821                 return -EINVAL;
3822         }
3823
3824         apbvt_set = 1;
3825         cm_id->add_ref(cm_id);
3826         cm_node = i40iw_create_cm_node(&iwdev->cm_core, iwdev,
3827                                        conn_param->private_data_len,
3828                                        (void *)conn_param->private_data,
3829                                        &cm_info);
3830
3831         if (IS_ERR(cm_node)) {
3832                 err = PTR_ERR(cm_node);
3833                 goto err_out;
3834         }
3835
3836         i40iw_record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord);
3837         if (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO &&
3838             !cm_node->ord_size)
3839                 cm_node->ord_size = 1;
3840
3841         cm_node->apbvt_set = apbvt_set;
3842         cm_node->qhash_set = qhash_set;
3843         iwqp->cm_node = cm_node;
3844         cm_node->iwqp = iwqp;
3845         iwqp->cm_id = cm_id;
3846         i40iw_add_ref(&iwqp->ibqp);
3847
3848         if (cm_node->state != I40IW_CM_STATE_OFFLOADED) {
3849                 cm_node->state = I40IW_CM_STATE_SYN_SENT;
3850                 err = i40iw_send_syn(cm_node, 0);
3851                 if (err) {
3852                         i40iw_rem_ref_cm_node(cm_node);
3853                         goto err_out;
3854                 }
3855         }
3856
3857         i40iw_debug(cm_node->dev,
3858                     I40IW_DEBUG_CM,
3859                     "Api - connect(): port=0x%04x, cm_node=%p, cm_id = %p.\n",
3860                     cm_node->rem_port,
3861                     cm_node,
3862                     cm_node->cm_id);
3863         return 0;
3864
3865 err_out:
3866         if (cm_info.ipv4)
3867                 i40iw_debug(&iwdev->sc_dev,
3868                             I40IW_DEBUG_CM,
3869                             "Api - connect() FAILED: dest addr=%pI4",
3870                             cm_info.rem_addr);
3871         else
3872                 i40iw_debug(&iwdev->sc_dev,
3873                             I40IW_DEBUG_CM,
3874                             "Api - connect() FAILED: dest addr=%pI6",
3875                             cm_info.rem_addr);
3876
3877         if (qhash_set)
3878                 i40iw_manage_qhash(iwdev,
3879                                    &cm_info,
3880                                    I40IW_QHASH_TYPE_TCP_ESTABLISHED,
3881                                    I40IW_QHASH_MANAGE_TYPE_DELETE,
3882                                    NULL,
3883                                    false);
3884
3885         if (apbvt_set && !i40iw_listen_port_in_use(&iwdev->cm_core,
3886                                                    cm_info.loc_port))
3887                 i40iw_manage_apbvt(iwdev,
3888                                    cm_info.loc_port,
3889                                    I40IW_MANAGE_APBVT_DEL);
3890         cm_id->rem_ref(cm_id);
3891         iwdev->cm_core.stats_connect_errs++;
3892         return err;
3893 }
3894
3895 /**
3896  * i40iw_create_listen - registered call creating listener
3897  * @cm_id: cm information for passive connection
3898  * @backlog: to max accept pending count
3899  */
3900 int i40iw_create_listen(struct iw_cm_id *cm_id, int backlog)
3901 {
3902         struct i40iw_device *iwdev;
3903         struct i40iw_cm_listener *cm_listen_node;
3904         struct i40iw_cm_info cm_info;
3905         enum i40iw_status_code ret;
3906         struct sockaddr_in *laddr;
3907         struct sockaddr_in6 *laddr6;
3908         bool wildcard = false;
3909
3910         iwdev = to_iwdev(cm_id->device);
3911         if (!iwdev)
3912                 return -EINVAL;
3913
3914         laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3915         laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3916         memset(&cm_info, 0, sizeof(cm_info));
3917         if (laddr->sin_family == AF_INET) {
3918                 cm_info.ipv4 = true;
3919                 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3920                 cm_info.loc_port = ntohs(laddr->sin_port);
3921
3922                 if (laddr->sin_addr.s_addr != INADDR_ANY)
3923                         cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr);
3924                 else
3925                         wildcard = true;
3926
3927         } else {
3928                 cm_info.ipv4 = false;
3929                 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3930                                     laddr6->sin6_addr.in6_u.u6_addr32);
3931                 cm_info.loc_port = ntohs(laddr6->sin6_port);
3932                 if (ipv6_addr_type(&laddr6->sin6_addr) != IPV6_ADDR_ANY)
3933                         i40iw_netdev_vlan_ipv6(cm_info.loc_addr,
3934                                                &cm_info.vlan_id,
3935                                                NULL);
3936                 else
3937                         wildcard = true;
3938         }
3939         cm_info.backlog = backlog;
3940         cm_info.cm_id = cm_id;
3941
3942         cm_listen_node = i40iw_make_listen_node(&iwdev->cm_core, iwdev, &cm_info);
3943         if (!cm_listen_node) {
3944                 i40iw_pr_err("cm_listen_node == NULL\n");
3945                 return -ENOMEM;
3946         }
3947
3948         cm_id->provider_data = cm_listen_node;
3949
3950         cm_listen_node->tos = cm_id->tos;
3951         cm_listen_node->user_pri = rt_tos2priority(cm_id->tos);
3952         cm_info.user_pri = cm_listen_node->user_pri;
3953
3954         if (!cm_listen_node->reused_node) {
3955                 if (wildcard) {
3956                         if (cm_info.ipv4)
3957                                 ret = i40iw_add_mqh_4(iwdev,
3958                                                       &cm_info,
3959                                                       cm_listen_node);
3960                         else
3961                                 ret = i40iw_add_mqh_6(iwdev,
3962                                                       &cm_info,
3963                                                       cm_listen_node);
3964                         if (ret)
3965                                 goto error;
3966
3967                         ret = i40iw_manage_apbvt(iwdev,
3968                                                  cm_info.loc_port,
3969                                                  I40IW_MANAGE_APBVT_ADD);
3970
3971                         if (ret)
3972                                 goto error;
3973                 } else {
3974                         ret = i40iw_manage_qhash(iwdev,
3975                                                  &cm_info,
3976                                                  I40IW_QHASH_TYPE_TCP_SYN,
3977                                                  I40IW_QHASH_MANAGE_TYPE_ADD,
3978                                                  NULL,
3979                                                  true);
3980                         if (ret)
3981                                 goto error;
3982                         cm_listen_node->qhash_set = true;
3983                         ret = i40iw_manage_apbvt(iwdev,
3984                                                  cm_info.loc_port,
3985                                                  I40IW_MANAGE_APBVT_ADD);
3986                         if (ret)
3987                                 goto error;
3988                 }
3989         }
3990         cm_id->add_ref(cm_id);
3991         cm_listen_node->cm_core->stats_listen_created++;
3992         return 0;
3993  error:
3994         i40iw_cm_del_listen(&iwdev->cm_core, (void *)cm_listen_node, false);
3995         return -EINVAL;
3996 }
3997
3998 /**
3999  * i40iw_destroy_listen - registered call to destroy listener
4000  * @cm_id: cm information for passive connection
4001  */
4002 int i40iw_destroy_listen(struct iw_cm_id *cm_id)
4003 {
4004         struct i40iw_device *iwdev;
4005
4006         iwdev = to_iwdev(cm_id->device);
4007         if (cm_id->provider_data)
4008                 i40iw_cm_del_listen(&iwdev->cm_core, cm_id->provider_data, true);
4009         else
4010                 i40iw_pr_err("cm_id->provider_data was NULL\n");
4011
4012         cm_id->rem_ref(cm_id);
4013
4014         return 0;
4015 }
4016
4017 /**
4018  * i40iw_cm_event_connected - handle connected active node
4019  * @event: the info for cm_node of connection
4020  */
4021 static void i40iw_cm_event_connected(struct i40iw_cm_event *event)
4022 {
4023         struct i40iw_qp *iwqp;
4024         struct i40iw_device *iwdev;
4025         struct i40iw_cm_node *cm_node;
4026         struct i40iw_sc_dev *dev;
4027         struct ib_qp_attr attr;
4028         struct iw_cm_id *cm_id;
4029         int status;
4030         bool read0;
4031
4032         cm_node = event->cm_node;
4033         cm_id = cm_node->cm_id;
4034         iwqp = (struct i40iw_qp *)cm_id->provider_data;
4035         iwdev = to_iwdev(iwqp->ibqp.device);
4036         dev = &iwdev->sc_dev;
4037
4038         if (iwqp->destroyed) {
4039                 status = -ETIMEDOUT;
4040                 goto error;
4041         }
4042         i40iw_cm_init_tsa_conn(iwqp, cm_node);
4043         read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO);
4044         if (iwqp->page)
4045                 iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
4046         dev->iw_priv_qp_ops->qp_send_rtt(&iwqp->sc_qp, read0);
4047         if (iwqp->page)
4048                 kunmap(iwqp->page);
4049         status = i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 0);
4050         if (status)
4051                 i40iw_pr_err("send cm event\n");
4052
4053         memset(&attr, 0, sizeof(attr));
4054         attr.qp_state = IB_QPS_RTS;
4055         cm_node->qhash_set = false;
4056         i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
4057
4058         cm_node->accelerated = 1;
4059         if (cm_node->accept_pend) {
4060                 if (!cm_node->listener)
4061                         i40iw_pr_err("listener is null for passive node\n");
4062                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
4063                 cm_node->accept_pend = 0;
4064         }
4065         return;
4066
4067 error:
4068         iwqp->cm_id = NULL;
4069         cm_id->provider_data = NULL;
4070         i40iw_send_cm_event(event->cm_node,
4071                             cm_id,
4072                             IW_CM_EVENT_CONNECT_REPLY,
4073                             status);
4074         cm_id->rem_ref(cm_id);
4075         i40iw_rem_ref_cm_node(event->cm_node);
4076 }
4077
4078 /**
4079  * i40iw_cm_event_reset - handle reset
4080  * @event: the info for cm_node of connection
4081  */
4082 static void i40iw_cm_event_reset(struct i40iw_cm_event *event)
4083 {
4084         struct i40iw_cm_node *cm_node = event->cm_node;
4085         struct iw_cm_id   *cm_id = cm_node->cm_id;
4086         struct i40iw_qp *iwqp;
4087
4088         if (!cm_id)
4089                 return;
4090
4091         iwqp = cm_id->provider_data;
4092         if (!iwqp)
4093                 return;
4094
4095         i40iw_debug(cm_node->dev,
4096                     I40IW_DEBUG_CM,
4097                     "reset event %p - cm_id = %p\n",
4098                      event->cm_node, cm_id);
4099         iwqp->cm_id = NULL;
4100
4101         i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT, -ECONNRESET);
4102         i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0);
4103 }
4104
4105 /**
4106  * i40iw_cm_event_handler - worker thread callback to send event to cm upper layer
4107  * @work: pointer of cm event info.
4108  */
4109 static void i40iw_cm_event_handler(struct work_struct *work)
4110 {
4111         struct i40iw_cm_event *event = container_of(work,
4112                                                     struct i40iw_cm_event,
4113                                                     event_work);
4114         struct i40iw_cm_node *cm_node;
4115
4116         if (!event || !event->cm_node || !event->cm_node->cm_core)
4117                 return;
4118
4119         cm_node = event->cm_node;
4120
4121         switch (event->type) {
4122         case I40IW_CM_EVENT_MPA_REQ:
4123                 i40iw_send_cm_event(cm_node,
4124                                     cm_node->cm_id,
4125                                     IW_CM_EVENT_CONNECT_REQUEST,
4126                                     0);
4127                 break;
4128         case I40IW_CM_EVENT_RESET:
4129                 i40iw_cm_event_reset(event);
4130                 break;
4131         case I40IW_CM_EVENT_CONNECTED:
4132                 if (!event->cm_node->cm_id ||
4133                     (event->cm_node->state != I40IW_CM_STATE_OFFLOADED))
4134                         break;
4135                 i40iw_cm_event_connected(event);
4136                 break;
4137         case I40IW_CM_EVENT_MPA_REJECT:
4138                 if (!event->cm_node->cm_id ||
4139                     (cm_node->state == I40IW_CM_STATE_OFFLOADED))
4140                         break;
4141                 i40iw_send_cm_event(cm_node,
4142                                     cm_node->cm_id,
4143                                     IW_CM_EVENT_CONNECT_REPLY,
4144                                     -ECONNREFUSED);
4145                 break;
4146         case I40IW_CM_EVENT_ABORTED:
4147                 if (!event->cm_node->cm_id ||
4148                     (event->cm_node->state == I40IW_CM_STATE_OFFLOADED))
4149                         break;
4150                 i40iw_event_connect_error(event);
4151                 break;
4152         default:
4153                 i40iw_pr_err("event type = %d\n", event->type);
4154                 break;
4155         }
4156
4157         event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
4158         i40iw_rem_ref_cm_node(event->cm_node);
4159         kfree(event);
4160 }
4161
4162 /**
4163  * i40iw_cm_post_event - queue event request for worker thread
4164  * @event: cm node's info for up event call
4165  */
4166 static void i40iw_cm_post_event(struct i40iw_cm_event *event)
4167 {
4168         atomic_inc(&event->cm_node->ref_count);
4169         event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
4170         INIT_WORK(&event->event_work, i40iw_cm_event_handler);
4171
4172         queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
4173 }
4174
4175 /**
4176  * i40iw_qhash_ctrl - enable/disable qhash for list
4177  * @iwdev: device pointer
4178  * @parent_listen_node: parent listen node
4179  * @nfo: cm info node
4180  * @ipaddr: Pointer to IPv4 or IPv6 address
4181  * @ipv4: flag indicating IPv4 when true
4182  * @ifup: flag indicating interface up when true
4183  *
4184  * Enables or disables the qhash for the node in the child
4185  * listen list that matches ipaddr. If no matching IP was found
4186  * it will allocate and add a new child listen node to the
4187  * parent listen node. The listen_list_lock is assumed to be
4188  * held when called.
4189  */
4190 static void i40iw_qhash_ctrl(struct i40iw_device *iwdev,
4191                              struct i40iw_cm_listener *parent_listen_node,
4192                              struct i40iw_cm_info *nfo,
4193                              u32 *ipaddr, bool ipv4, bool ifup)
4194 {
4195         struct list_head *child_listen_list = &parent_listen_node->child_listen_list;
4196         struct i40iw_cm_listener *child_listen_node;
4197         struct list_head *pos, *tpos;
4198         enum i40iw_status_code ret;
4199         bool node_allocated = false;
4200         enum i40iw_quad_hash_manage_type op =
4201                 ifup ? I40IW_QHASH_MANAGE_TYPE_ADD : I40IW_QHASH_MANAGE_TYPE_DELETE;
4202
4203         list_for_each_safe(pos, tpos, child_listen_list) {
4204                 child_listen_node =
4205                         list_entry(pos,
4206                                    struct i40iw_cm_listener,
4207                                    child_listen_list);
4208                 if (!memcmp(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16))
4209                         goto set_qhash;
4210         }
4211
4212         /* if not found then add a child listener if interface is going up */
4213         if (!ifup)
4214                 return;
4215         child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
4216         if (!child_listen_node)
4217                 return;
4218         node_allocated = true;
4219         memcpy(child_listen_node, parent_listen_node, sizeof(*child_listen_node));
4220
4221         memcpy(child_listen_node->loc_addr, ipaddr,  ipv4 ? 4 : 16);
4222
4223 set_qhash:
4224         memcpy(nfo->loc_addr,
4225                child_listen_node->loc_addr,
4226                sizeof(nfo->loc_addr));
4227         nfo->vlan_id = child_listen_node->vlan_id;
4228         ret = i40iw_manage_qhash(iwdev, nfo,
4229                                  I40IW_QHASH_TYPE_TCP_SYN,
4230                                  op,
4231                                  NULL, false);
4232         if (!ret) {
4233                 child_listen_node->qhash_set = ifup;
4234                 if (node_allocated)
4235                         list_add(&child_listen_node->child_listen_list,
4236                                  &parent_listen_node->child_listen_list);
4237         } else if (node_allocated) {
4238                 kfree(child_listen_node);
4239         }
4240 }
4241
4242 /**
4243  * i40iw_cm_disconnect_all - disconnect all connected qp's
4244  * @iwdev: device pointer
4245  */
4246 void i40iw_cm_disconnect_all(struct i40iw_device *iwdev)
4247 {
4248         struct i40iw_cm_core *cm_core = &iwdev->cm_core;
4249         struct list_head *list_core_temp;
4250         struct list_head *list_node;
4251         struct i40iw_cm_node *cm_node;
4252         unsigned long flags;
4253         struct list_head connected_list;
4254         struct ib_qp_attr attr;
4255
4256         INIT_LIST_HEAD(&connected_list);
4257         spin_lock_irqsave(&cm_core->ht_lock, flags);
4258         list_for_each_safe(list_node, list_core_temp, &cm_core->connected_nodes) {
4259                 cm_node = container_of(list_node, struct i40iw_cm_node, list);
4260                 atomic_inc(&cm_node->ref_count);
4261                 list_add(&cm_node->connected_entry, &connected_list);
4262         }
4263         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
4264
4265         list_for_each_safe(list_node, list_core_temp, &connected_list) {
4266                 cm_node = container_of(list_node, struct i40iw_cm_node, connected_entry);
4267                 attr.qp_state = IB_QPS_ERR;
4268                 i40iw_modify_qp(&cm_node->iwqp->ibqp, &attr, IB_QP_STATE, NULL);
4269                 if (iwdev->reset)
4270                         i40iw_cm_disconn(cm_node->iwqp);
4271                 i40iw_rem_ref_cm_node(cm_node);
4272         }
4273 }
4274
4275 /**
4276  * i40iw_ifdown_notify - process an ifdown on an interface
4277  * @iwdev: device pointer
4278  * @ipaddr: Pointer to IPv4 or IPv6 address
4279  * @ipv4: flag indicating IPv4 when true
4280  * @ifup: flag indicating interface up when true
4281  */
4282 void i40iw_if_notify(struct i40iw_device *iwdev, struct net_device *netdev,
4283                      u32 *ipaddr, bool ipv4, bool ifup)
4284 {
4285         struct i40iw_cm_core *cm_core = &iwdev->cm_core;
4286         unsigned long flags;
4287         struct i40iw_cm_listener *listen_node;
4288         static const u32 ip_zero[4] = { 0, 0, 0, 0 };
4289         struct i40iw_cm_info nfo;
4290         u16 vlan_id = rdma_vlan_dev_vlan_id(netdev);
4291         enum i40iw_status_code ret;
4292         enum i40iw_quad_hash_manage_type op =
4293                 ifup ? I40IW_QHASH_MANAGE_TYPE_ADD : I40IW_QHASH_MANAGE_TYPE_DELETE;
4294
4295         /* Disable or enable qhash for listeners */
4296         spin_lock_irqsave(&cm_core->listen_list_lock, flags);
4297         list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
4298                 if (vlan_id == listen_node->vlan_id &&
4299                     (!memcmp(listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16) ||
4300                     !memcmp(listen_node->loc_addr, ip_zero, ipv4 ? 4 : 16))) {
4301                         memcpy(nfo.loc_addr, listen_node->loc_addr,
4302                                sizeof(nfo.loc_addr));
4303                         nfo.loc_port = listen_node->loc_port;
4304                         nfo.ipv4 = listen_node->ipv4;
4305                         nfo.vlan_id = listen_node->vlan_id;
4306                         nfo.user_pri = listen_node->user_pri;
4307                         if (!list_empty(&listen_node->child_listen_list)) {
4308                                 i40iw_qhash_ctrl(iwdev,
4309                                                  listen_node,
4310                                                  &nfo,
4311                                                  ipaddr, ipv4, ifup);
4312                         } else if (memcmp(listen_node->loc_addr, ip_zero,
4313                                           ipv4 ? 4 : 16)) {
4314                                 ret = i40iw_manage_qhash(iwdev,
4315                                                          &nfo,
4316                                                          I40IW_QHASH_TYPE_TCP_SYN,
4317                                                          op,
4318                                                          NULL,
4319                                                          false);
4320                                 if (!ret)
4321                                         listen_node->qhash_set = ifup;
4322                         }
4323                 }
4324         }
4325         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
4326
4327         /* disconnect any connected qp's on ifdown */
4328         if (!ifup)
4329                 i40iw_cm_disconnect_all(iwdev);
4330 }