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         ctrl_ird |= IETF_FLPDU_ZERO_LEN;
 788
 789         switch (mpa_key) {
 790         case MPA_KEY_REQUEST:
 791                 ctrl_ord |= IETF_RDMA0_WRITE;
 792                 ctrl_ord |= IETF_RDMA0_READ;
 793                 break;
 794         case MPA_KEY_REPLY:
 795                 switch (cm_node->send_rdma0_op) {
 796                 case SEND_RDMA_WRITE_ZERO:
 797                         ctrl_ord |= IETF_RDMA0_WRITE;
 798                         break;
 799                 case SEND_RDMA_READ_ZERO:
 800                         ctrl_ord |= IETF_RDMA0_READ;
 801                         break;
 802                 }
 803                 break;
 804         default:
 805                 break;
 806         }
 807         rtr_msg->ctrl_ird = htons(ctrl_ird);
 808         rtr_msg->ctrl_ord = htons(ctrl_ord);
 809 }
 810
 811 /**
 812  * i40iw_cm_build_mpa_frame - build mpa frame for mpa version 1 or version 2
 813  * @cm_node: connection's node
 814  * @mpa: mpa: data buffer
 815  * @mpa_key: to do read0 or write0
 816  */
 817 static int i40iw_cm_build_mpa_frame(struct i40iw_cm_node *cm_node,
 818                                     struct i40iw_kmem_info *mpa,
 819                                     u8 mpa_key)
 820 {
 821         int hdr_len = 0;
 822
 823         switch (cm_node->mpa_frame_rev) {
 824         case IETF_MPA_V1:
 825                 hdr_len = sizeof(struct ietf_mpa_v1);
 826                 i40iw_build_mpa_v1(cm_node, mpa->addr, mpa_key);
 827                 break;
 828         case IETF_MPA_V2:
 829                 hdr_len = sizeof(struct ietf_mpa_v2);
 830                 i40iw_build_mpa_v2(cm_node, mpa->addr, mpa_key);
 831                 break;
 832         default:
 833                 break;
 834         }
 835
 836         return hdr_len;
 837 }
 838
 839 /**
 840  * i40iw_send_mpa_request - active node send mpa request to passive node
 841  * @cm_node: connection's node
 842  */
 843 static int i40iw_send_mpa_request(struct i40iw_cm_node *cm_node)
 844 {
 845         struct i40iw_puda_buf *sqbuf;
 846
 847         if (!cm_node) {
 848                 i40iw_pr_err("cm_node == NULL\n");
 849                 return -1;
 850         }
 851
 852         cm_node->mpa_hdr.addr = &cm_node->mpa_frame;
 853         cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node,
 854                                                          &cm_node->mpa_hdr,
 855                                                          MPA_KEY_REQUEST);
 856         if (!cm_node->mpa_hdr.size) {
 857                 i40iw_pr_err("mpa size = %d\n", cm_node->mpa_hdr.size);
 858                 return -1;
 859         }
 860
 861         sqbuf = i40iw_form_cm_frame(cm_node,
 862                                     NULL,
 863                                     &cm_node->mpa_hdr,
 864                                     &cm_node->pdata,
 865                                     SET_ACK);
 866         if (!sqbuf) {
 867                 i40iw_pr_err("sq_buf == NULL\n");
 868                 return -1;
 869         }
 870         return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
 871 }
 872
 873 /**
 874  * i40iw_send_mpa_reject -
 875  * @cm_node: connection's node
 876  * @pdata: reject data for connection
 877  * @plen: length of reject data
 878  */
 879 static int i40iw_send_mpa_reject(struct i40iw_cm_node *cm_node,
 880                                  const void *pdata,
 881                                  u8 plen)
 882 {
 883         struct i40iw_puda_buf *sqbuf;
 884         struct i40iw_kmem_info priv_info;
 885
 886         cm_node->mpa_hdr.addr = &cm_node->mpa_frame;
 887         cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node,
 888                                                          &cm_node->mpa_hdr,
 889                                                          MPA_KEY_REPLY);
 890
 891         cm_node->mpa_frame.flags |= IETF_MPA_FLAGS_REJECT;
 892         priv_info.addr = (void *)pdata;
 893         priv_info.size = plen;
 894
 895         sqbuf = i40iw_form_cm_frame(cm_node,
 896                                     NULL,
 897                                     &cm_node->mpa_hdr,
 898                                     &priv_info,
 899                                     SET_ACK | SET_FIN);
 900         if (!sqbuf) {
 901                 i40iw_pr_err("no sqbuf\n");
 902                 return -ENOMEM;
 903         }
 904         cm_node->state = I40IW_CM_STATE_FIN_WAIT1;
 905         return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
 906 }
 907
 908 /**
 909  * recv_mpa - process an IETF MPA frame
 910  * @cm_node: connection's node
 911  * @buffer: Data pointer
 912  * @type: to return accept or reject
 913  * @len: Len of mpa buffer
 914  */
 915 static int i40iw_parse_mpa(struct i40iw_cm_node *cm_node, u8 *buffer, u32 *type, u32 len)
 916 {
 917         struct ietf_mpa_v1 *mpa_frame;
 918         struct ietf_mpa_v2 *mpa_v2_frame;
 919         struct ietf_rtr_msg *rtr_msg;
 920         int mpa_hdr_len;
 921         int priv_data_len;
 922
 923         *type = I40IW_MPA_REQUEST_ACCEPT;
 924
 925         if (len < sizeof(struct ietf_mpa_v1)) {
 926                 i40iw_pr_err("ietf buffer small (%x)\n", len);
 927                 return -1;
 928         }
 929
 930         mpa_frame = (struct ietf_mpa_v1 *)buffer;
 931         mpa_hdr_len = sizeof(struct ietf_mpa_v1);
 932         priv_data_len = ntohs(mpa_frame->priv_data_len);
 933
 934         if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) {
 935                 i40iw_pr_err("large pri_data %d\n", priv_data_len);
 936                 return -1;
 937         }
 938         if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) {
 939                 i40iw_pr_err("unsupported mpa rev = %d\n", mpa_frame->rev);
 940                 return -1;
 941         }
 942         if (mpa_frame->rev > cm_node->mpa_frame_rev) {
 943                 i40iw_pr_err("rev %d\n", mpa_frame->rev);
 944                 return -1;
 945         }
 946         cm_node->mpa_frame_rev = mpa_frame->rev;
 947
 948         if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) {
 949                 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) {
 950                         i40iw_pr_err("Unexpected MPA Key received\n");
 951                         return -1;
 952                 }
 953         } else {
 954                 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) {
 955                         i40iw_pr_err("Unexpected MPA Key received\n");
 956                         return -1;
 957                 }
 958         }
 959
 960         if (priv_data_len + mpa_hdr_len > len) {
 961                 i40iw_pr_err("ietf buffer len(%x + %x != %x)\n",
 962                              priv_data_len, mpa_hdr_len, len);
 963                 return -1;
 964         }
 965         if (len > MAX_CM_BUFFER) {
 966                 i40iw_pr_err("ietf buffer large len = %d\n", len);
 967                 return -1;
 968         }
 969
 970         switch (mpa_frame->rev) {
 971         case IETF_MPA_V2:{
 972                         u16 ird_size;
 973                         u16 ord_size;
 974                         u16 ctrl_ord;
 975                         u16 ctrl_ird;
 976
 977                         mpa_v2_frame = (struct ietf_mpa_v2 *)buffer;
 978                         mpa_hdr_len += IETF_RTR_MSG_SIZE;
 979                         rtr_msg = &mpa_v2_frame->rtr_msg;
 980
 981                         /* parse rtr message */
 982                         ctrl_ord = ntohs(rtr_msg->ctrl_ord);
 983                         ctrl_ird = ntohs(rtr_msg->ctrl_ird);
 984                         ird_size = ctrl_ird & IETF_NO_IRD_ORD;
 985                         ord_size = ctrl_ord & IETF_NO_IRD_ORD;
 986
 987                         if (!(ctrl_ird & IETF_PEER_TO_PEER))
 988                                 return -1;
 989
 990                         if (ird_size == IETF_NO_IRD_ORD || ord_size == IETF_NO_IRD_ORD) {
 991                                 cm_node->mpav2_ird_ord = IETF_NO_IRD_ORD;
 992                                 goto negotiate_done;
 993                         }
 994
 995                         if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) {
 996                                 /* responder */
 997                                 if (!ord_size && (ctrl_ord & IETF_RDMA0_READ))
 998                                         cm_node->ird_size = 1;
 999                                 if (cm_node->ord_size > ird_size)
1000                                         cm_node->ord_size = ird_size;
1001                         } else {
1002                                 /* initiator */
1003                                 if (!ird_size && (ctrl_ord & IETF_RDMA0_READ))
1004                                         return -1;
1005                                 if (cm_node->ord_size > ird_size)
1006                                         cm_node->ord_size = ird_size;
1007
1008                                 if (cm_node->ird_size < ord_size)
1009                                         /* no resources available */
1010                                         return -1;
1011                         }
1012
1013 negotiate_done:
1014                         if (ctrl_ord & IETF_RDMA0_READ)
1015                                 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
1016                         else if (ctrl_ord & IETF_RDMA0_WRITE)
1017                                 cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO;
1018                         else    /* Not supported RDMA0 operation */
1019                                 return -1;
1020                         i40iw_debug(cm_node->dev, I40IW_DEBUG_CM,
1021                                     "MPAV2: Negotiated ORD: %d, IRD: %d\n",
1022                                     cm_node->ord_size, cm_node->ird_size);
1023                         break;
1024                 }
1025                 break;
1026         case IETF_MPA_V1:
1027         default:
1028                 break;
1029         }
1030
1031         memcpy(cm_node->pdata_buf, buffer + mpa_hdr_len, priv_data_len);
1032         cm_node->pdata.size = priv_data_len;
1033
1034         if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT)
1035                 *type = I40IW_MPA_REQUEST_REJECT;
1036
1037         if (mpa_frame->flags & IETF_MPA_FLAGS_MARKERS)
1038                 cm_node->snd_mark_en = true;
1039
1040         return 0;
1041 }
1042
1043 /**
1044  * i40iw_schedule_cm_timer
1045  * @@cm_node: connection's node
1046  * @sqbuf: buffer to send
1047  * @type: if it es send ot close
1048  * @send_retrans: if rexmits to be done
1049  * @close_when_complete: is cm_node to be removed
1050  *
1051  * note - cm_node needs to be protected before calling this. Encase in:
1052  *              i40iw_rem_ref_cm_node(cm_core, cm_node);
1053  *              i40iw_schedule_cm_timer(...)
1054  *              atomic_inc(&cm_node->ref_count);
1055  */
1056 int i40iw_schedule_cm_timer(struct i40iw_cm_node *cm_node,
1057                             struct i40iw_puda_buf *sqbuf,
1058                             enum i40iw_timer_type type,
1059                             int send_retrans,
1060                             int close_when_complete)
1061 {
1062         struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi;
1063         struct i40iw_cm_core *cm_core = cm_node->cm_core;
1064         struct i40iw_timer_entry *new_send;
1065         int ret = 0;
1066         u32 was_timer_set;
1067         unsigned long flags;
1068
1069         new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
1070         if (!new_send) {
1071                 i40iw_free_sqbuf(vsi, (void *)sqbuf);
1072                 return -ENOMEM;
1073         }
1074         new_send->retrycount = I40IW_DEFAULT_RETRYS;
1075         new_send->retranscount = I40IW_DEFAULT_RETRANS;
1076         new_send->sqbuf = sqbuf;
1077         new_send->timetosend = jiffies;
1078         new_send->type = type;
1079         new_send->send_retrans = send_retrans;
1080         new_send->close_when_complete = close_when_complete;
1081
1082         if (type == I40IW_TIMER_TYPE_CLOSE) {
1083                 new_send->timetosend += (HZ / 10);
1084                 if (cm_node->close_entry) {
1085                         kfree(new_send);
1086                         i40iw_free_sqbuf(vsi, (void *)sqbuf);
1087                         i40iw_pr_err("already close entry\n");
1088                         return -EINVAL;
1089                 }
1090                 cm_node->close_entry = new_send;
1091         }
1092
1093         if (type == I40IW_TIMER_TYPE_SEND) {
1094                 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1095                 cm_node->send_entry = new_send;
1096                 atomic_inc(&cm_node->ref_count);
1097                 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1098                 new_send->timetosend = jiffies + I40IW_RETRY_TIMEOUT;
1099
1100                 atomic_inc(&sqbuf->refcount);
1101                 i40iw_puda_send_buf(vsi->ilq, sqbuf);
1102                 if (!send_retrans) {
1103                         i40iw_cleanup_retrans_entry(cm_node);
1104                         if (close_when_complete)
1105                                 i40iw_rem_ref_cm_node(cm_node);
1106                         return ret;
1107                 }
1108         }
1109
1110         spin_lock_irqsave(&cm_core->ht_lock, flags);
1111         was_timer_set = timer_pending(&cm_core->tcp_timer);
1112
1113         if (!was_timer_set) {
1114                 cm_core->tcp_timer.expires = new_send->timetosend;
1115                 add_timer(&cm_core->tcp_timer);
1116         }
1117         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1118
1119         return ret;
1120 }
1121
1122 /**
1123  * i40iw_retrans_expired - Could not rexmit the packet
1124  * @cm_node: connection's node
1125  */
1126 static void i40iw_retrans_expired(struct i40iw_cm_node *cm_node)
1127 {
1128         struct iw_cm_id *cm_id = cm_node->cm_id;
1129         enum i40iw_cm_node_state state = cm_node->state;
1130
1131         cm_node->state = I40IW_CM_STATE_CLOSED;
1132         switch (state) {
1133         case I40IW_CM_STATE_SYN_RCVD:
1134         case I40IW_CM_STATE_CLOSING:
1135                 i40iw_rem_ref_cm_node(cm_node);
1136                 break;
1137         case I40IW_CM_STATE_FIN_WAIT1:
1138         case I40IW_CM_STATE_LAST_ACK:
1139                 if (cm_node->cm_id)
1140                         cm_id->rem_ref(cm_id);
1141                 i40iw_send_reset(cm_node);
1142                 break;
1143         default:
1144                 atomic_inc(&cm_node->ref_count);
1145                 i40iw_send_reset(cm_node);
1146                 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
1147                 break;
1148         }
1149 }
1150
1151 /**
1152  * i40iw_handle_close_entry - for handling retry/timeouts
1153  * @cm_node: connection's node
1154  * @rem_node: flag for remove cm_node
1155  */
1156 static void i40iw_handle_close_entry(struct i40iw_cm_node *cm_node, u32 rem_node)
1157 {
1158         struct i40iw_timer_entry *close_entry = cm_node->close_entry;
1159         struct iw_cm_id *cm_id = cm_node->cm_id;
1160         struct i40iw_qp *iwqp;
1161         unsigned long flags;
1162
1163         if (!close_entry)
1164                 return;
1165         iwqp = (struct i40iw_qp *)close_entry->sqbuf;
1166         if (iwqp) {
1167                 spin_lock_irqsave(&iwqp->lock, flags);
1168                 if (iwqp->cm_id) {
1169                         iwqp->hw_tcp_state = I40IW_TCP_STATE_CLOSED;
1170                         iwqp->hw_iwarp_state = I40IW_QP_STATE_ERROR;
1171                         iwqp->last_aeq = I40IW_AE_RESET_SENT;
1172                         iwqp->ibqp_state = IB_QPS_ERR;
1173                         spin_unlock_irqrestore(&iwqp->lock, flags);
1174                         i40iw_cm_disconn(iwqp);
1175                 } else {
1176                         spin_unlock_irqrestore(&iwqp->lock, flags);
1177                 }
1178         } else if (rem_node) {
1179                 /* TIME_WAIT state */
1180                 i40iw_rem_ref_cm_node(cm_node);
1181         }
1182         if (cm_id)
1183                 cm_id->rem_ref(cm_id);
1184         kfree(close_entry);
1185         cm_node->close_entry = NULL;
1186 }
1187
1188 /**
1189  * i40iw_cm_timer_tick - system's timer expired callback
1190  * @pass: Pointing to cm_core
1191  */
1192 static void i40iw_cm_timer_tick(unsigned long pass)
1193 {
1194         unsigned long nexttimeout = jiffies + I40IW_LONG_TIME;
1195         struct i40iw_cm_node *cm_node;
1196         struct i40iw_timer_entry *send_entry, *close_entry;
1197         struct list_head *list_core_temp;
1198         struct i40iw_sc_vsi *vsi;
1199         struct list_head *list_node;
1200         struct i40iw_cm_core *cm_core = (struct i40iw_cm_core *)pass;
1201         u32 settimer = 0;
1202         unsigned long timetosend;
1203         struct i40iw_sc_dev *dev;
1204         unsigned long flags;
1205
1206         struct list_head timer_list;
1207
1208         INIT_LIST_HEAD(&timer_list);
1209         spin_lock_irqsave(&cm_core->ht_lock, flags);
1210
1211         list_for_each_safe(list_node, list_core_temp, &cm_core->connected_nodes) {
1212                 cm_node = container_of(list_node, struct i40iw_cm_node, list);
1213                 if (cm_node->close_entry || cm_node->send_entry) {
1214                         atomic_inc(&cm_node->ref_count);
1215                         list_add(&cm_node->timer_entry, &timer_list);
1216                 }
1217         }
1218         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1219
1220         list_for_each_safe(list_node, list_core_temp, &timer_list) {
1221                 cm_node = container_of(list_node,
1222                                        struct i40iw_cm_node,
1223                                        timer_entry);
1224                 close_entry = cm_node->close_entry;
1225
1226                 if (close_entry) {
1227                         if (time_after(close_entry->timetosend, jiffies)) {
1228                                 if (nexttimeout > close_entry->timetosend ||
1229                                     !settimer) {
1230                                         nexttimeout = close_entry->timetosend;
1231                                         settimer = 1;
1232                                 }
1233                         } else {
1234                                 i40iw_handle_close_entry(cm_node, 1);
1235                         }
1236                 }
1237
1238                 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1239
1240                 send_entry = cm_node->send_entry;
1241                 if (!send_entry)
1242                         goto done;
1243                 if (time_after(send_entry->timetosend, jiffies)) {
1244                         if (cm_node->state != I40IW_CM_STATE_OFFLOADED) {
1245                                 if ((nexttimeout > send_entry->timetosend) ||
1246                                     !settimer) {
1247                                         nexttimeout = send_entry->timetosend;
1248                                         settimer = 1;
1249                                 }
1250                         } else {
1251                                 i40iw_free_retrans_entry(cm_node);
1252                         }
1253                         goto done;
1254                 }
1255
1256                 if ((cm_node->state == I40IW_CM_STATE_OFFLOADED) ||
1257                     (cm_node->state == I40IW_CM_STATE_CLOSED)) {
1258                         i40iw_free_retrans_entry(cm_node);
1259                         goto done;
1260                 }
1261
1262                 if (!send_entry->retranscount || !send_entry->retrycount) {
1263                         i40iw_free_retrans_entry(cm_node);
1264
1265                         spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1266                         i40iw_retrans_expired(cm_node);
1267                         cm_node->state = I40IW_CM_STATE_CLOSED;
1268                         spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1269                         goto done;
1270                 }
1271                 cm_node->cm_core->stats_pkt_retrans++;
1272                 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1273
1274                 vsi = &cm_node->iwdev->vsi;
1275                 dev = cm_node->dev;
1276                 atomic_inc(&send_entry->sqbuf->refcount);
1277                 i40iw_puda_send_buf(vsi->ilq, send_entry->sqbuf);
1278                 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1279                 if (send_entry->send_retrans) {
1280                         send_entry->retranscount--;
1281                         timetosend = (I40IW_RETRY_TIMEOUT <<
1282                                       (I40IW_DEFAULT_RETRANS -
1283                                        send_entry->retranscount));
1284
1285                         send_entry->timetosend = jiffies +
1286                             min(timetosend, I40IW_MAX_TIMEOUT);
1287                         if (nexttimeout > send_entry->timetosend || !settimer) {
1288                                 nexttimeout = send_entry->timetosend;
1289                                 settimer = 1;
1290                         }
1291                 } else {
1292                         int close_when_complete;
1293
1294                         close_when_complete = send_entry->close_when_complete;
1295                         i40iw_debug(cm_node->dev,
1296                                     I40IW_DEBUG_CM,
1297                                     "cm_node=%p state=%d\n",
1298                                     cm_node,
1299                                     cm_node->state);
1300                         i40iw_free_retrans_entry(cm_node);
1301                         if (close_when_complete)
1302                                 i40iw_rem_ref_cm_node(cm_node);
1303                 }
1304 done:
1305                 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1306                 i40iw_rem_ref_cm_node(cm_node);
1307         }
1308
1309         if (settimer) {
1310                 spin_lock_irqsave(&cm_core->ht_lock, flags);
1311                 if (!timer_pending(&cm_core->tcp_timer)) {
1312                         cm_core->tcp_timer.expires = nexttimeout;
1313                         add_timer(&cm_core->tcp_timer);
1314                 }
1315                 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1316         }
1317 }
1318
1319 /**
1320  * i40iw_send_syn - send SYN packet
1321  * @cm_node: connection's node
1322  * @sendack: flag to set ACK bit or not
1323  */
1324 int i40iw_send_syn(struct i40iw_cm_node *cm_node, u32 sendack)
1325 {
1326         struct i40iw_puda_buf *sqbuf;
1327         int flags = SET_SYN;
1328         char optionsbuffer[sizeof(struct option_mss) +
1329                            sizeof(struct option_windowscale) +
1330                            sizeof(struct option_base) + TCP_OPTIONS_PADDING];
1331         struct i40iw_kmem_info opts;
1332
1333         int optionssize = 0;
1334         /* Sending MSS option */
1335         union all_known_options *options;
1336
1337         opts.addr = optionsbuffer;
1338         if (!cm_node) {
1339                 i40iw_pr_err("no cm_node\n");
1340                 return -EINVAL;
1341         }
1342
1343         options = (union all_known_options *)&optionsbuffer[optionssize];
1344         options->as_mss.optionnum = OPTION_NUMBER_MSS;
1345         options->as_mss.length = sizeof(struct option_mss);
1346         options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
1347         optionssize += sizeof(struct option_mss);
1348
1349         options = (union all_known_options *)&optionsbuffer[optionssize];
1350         options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
1351         options->as_windowscale.length = sizeof(struct option_windowscale);
1352         options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
1353         optionssize += sizeof(struct option_windowscale);
1354         options = (union all_known_options *)&optionsbuffer[optionssize];
1355         options->as_end = OPTION_NUMBER_END;
1356         optionssize += 1;
1357
1358         if (sendack)
1359                 flags |= SET_ACK;
1360
1361         opts.size = optionssize;
1362
1363         sqbuf = i40iw_form_cm_frame(cm_node, &opts, NULL, NULL, flags);
1364         if (!sqbuf) {
1365                 i40iw_pr_err("no sqbuf\n");
1366                 return -1;
1367         }
1368         return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
1369 }
1370
1371 /**
1372  * i40iw_send_ack - Send ACK packet
1373  * @cm_node: connection's node
1374  */
1375 static void i40iw_send_ack(struct i40iw_cm_node *cm_node)
1376 {
1377         struct i40iw_puda_buf *sqbuf;
1378         struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi;
1379
1380         sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK);
1381         if (sqbuf)
1382                 i40iw_puda_send_buf(vsi->ilq, sqbuf);
1383         else
1384                 i40iw_pr_err("no sqbuf\n");
1385 }
1386
1387 /**
1388  * i40iw_send_fin - Send FIN pkt
1389  * @cm_node: connection's node
1390  */
1391 static int i40iw_send_fin(struct i40iw_cm_node *cm_node)
1392 {
1393         struct i40iw_puda_buf *sqbuf;
1394
1395         sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK | SET_FIN);
1396         if (!sqbuf) {
1397                 i40iw_pr_err("no sqbuf\n");
1398                 return -1;
1399         }
1400         return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
1401 }
1402
1403 /**
1404  * i40iw_find_node - find a cm node that matches the reference cm node
1405  * @cm_core: cm's core
1406  * @rem_port: remote tcp port num
1407  * @rem_addr: remote ip addr
1408  * @loc_port: local tcp port num
1409  * @loc_addr: loc ip addr
1410  * @add_refcnt: flag to increment refcount of cm_node
1411  */
1412 struct i40iw_cm_node *i40iw_find_node(struct i40iw_cm_core *cm_core,
1413                                       u16 rem_port,
1414                                       u32 *rem_addr,
1415                                       u16 loc_port,
1416                                       u32 *loc_addr,
1417                                       bool add_refcnt)
1418 {
1419         struct list_head *hte;
1420         struct i40iw_cm_node *cm_node;
1421         unsigned long flags;
1422
1423         hte = &cm_core->connected_nodes;
1424
1425         /* walk list and find cm_node associated with this session ID */
1426         spin_lock_irqsave(&cm_core->ht_lock, flags);
1427         list_for_each_entry(cm_node, hte, list) {
1428                 if (!memcmp(cm_node->loc_addr, loc_addr, sizeof(cm_node->loc_addr)) &&
1429                     (cm_node->loc_port == loc_port) &&
1430                     !memcmp(cm_node->rem_addr, rem_addr, sizeof(cm_node->rem_addr)) &&
1431                     (cm_node->rem_port == rem_port)) {
1432                         if (add_refcnt)
1433                                 atomic_inc(&cm_node->ref_count);
1434                         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1435                         return cm_node;
1436                 }
1437         }
1438         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1439
1440         /* no owner node */
1441         return NULL;
1442 }
1443
1444 /**
1445  * i40iw_find_listener - find a cm node listening on this addr-port pair
1446  * @cm_core: cm's core
1447  * @dst_port: listener tcp port num
1448  * @dst_addr: listener ip addr
1449  * @listener_state: state to match with listen node's
1450  */
1451 static struct i40iw_cm_listener *i40iw_find_listener(
1452                                                      struct i40iw_cm_core *cm_core,
1453                                                      u32 *dst_addr,
1454                                                      u16 dst_port,
1455                                                      u16 vlan_id,
1456                                                      enum i40iw_cm_listener_state
1457                                                      listener_state)
1458 {
1459         struct i40iw_cm_listener *listen_node;
1460         static const u32 ip_zero[4] = { 0, 0, 0, 0 };
1461         u32 listen_addr[4];
1462         u16 listen_port;
1463         unsigned long flags;
1464
1465         /* walk list and find cm_node associated with this session ID */
1466         spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1467         list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
1468                 memcpy(listen_addr, listen_node->loc_addr, sizeof(listen_addr));
1469                 listen_port = listen_node->loc_port;
1470                 /* compare node pair, return node handle if a match */
1471                 if ((!memcmp(listen_addr, dst_addr, sizeof(listen_addr)) ||
1472                      !memcmp(listen_addr, ip_zero, sizeof(listen_addr))) &&
1473                      (listen_port == dst_port) &&
1474                      (listener_state & listen_node->listener_state)) {
1475                         atomic_inc(&listen_node->ref_count);
1476                         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1477                         return listen_node;
1478                 }
1479         }
1480         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1481         return NULL;
1482 }
1483
1484 /**
1485  * i40iw_add_hte_node - add a cm node to the hash table
1486  * @cm_core: cm's core
1487  * @cm_node: connection's node
1488  */
1489 static void i40iw_add_hte_node(struct i40iw_cm_core *cm_core,
1490                                struct i40iw_cm_node *cm_node)
1491 {
1492         struct list_head *hte;
1493         unsigned long flags;
1494
1495         if (!cm_node || !cm_core) {
1496                 i40iw_pr_err("cm_node or cm_core == NULL\n");
1497                 return;
1498         }
1499         spin_lock_irqsave(&cm_core->ht_lock, flags);
1500
1501         /* get a handle on the hash table element (list head for this slot) */
1502         hte = &cm_core->connected_nodes;
1503         list_add_tail(&cm_node->list, hte);
1504         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1505 }
1506
1507 /**
1508  * listen_port_in_use - determine if port is in use
1509  * @port: Listen port number
1510  */
1511 static bool i40iw_listen_port_in_use(struct i40iw_cm_core *cm_core, u16 port)
1512 {
1513         struct i40iw_cm_listener *listen_node;
1514         unsigned long flags;
1515         bool ret = false;
1516
1517         spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1518         list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
1519                 if (listen_node->loc_port == port) {
1520                         ret = true;
1521                         break;
1522                 }
1523         }
1524         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1525         return ret;
1526 }
1527
1528 /**
1529  * i40iw_del_multiple_qhash - Remove qhash and child listens
1530  * @iwdev: iWarp device
1531  * @cm_info: CM info for parent listen node
1532  * @cm_parent_listen_node: The parent listen node
1533  */
1534 static enum i40iw_status_code i40iw_del_multiple_qhash(
1535                                                        struct i40iw_device *iwdev,
1536                                                        struct i40iw_cm_info *cm_info,
1537                                                        struct i40iw_cm_listener *cm_parent_listen_node)
1538 {
1539         struct i40iw_cm_listener *child_listen_node;
1540         enum i40iw_status_code ret = I40IW_ERR_CONFIG;
1541         struct list_head *pos, *tpos;
1542         unsigned long flags;
1543
1544         spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1545         list_for_each_safe(pos, tpos, &cm_parent_listen_node->child_listen_list) {
1546                 child_listen_node = list_entry(pos, struct i40iw_cm_listener, child_listen_list);
1547                 if (child_listen_node->ipv4)
1548                         i40iw_debug(&iwdev->sc_dev,
1549                                     I40IW_DEBUG_CM,
1550                                     "removing child listen for IP=%pI4, port=%d, vlan=%d\n",
1551                                     child_listen_node->loc_addr,
1552                                     child_listen_node->loc_port,
1553                                     child_listen_node->vlan_id);
1554                 else
1555                         i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM,
1556                                     "removing child listen for IP=%pI6, port=%d, vlan=%d\n",
1557                                     child_listen_node->loc_addr,
1558                                     child_listen_node->loc_port,
1559                                     child_listen_node->vlan_id);
1560                 list_del(pos);
1561                 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1562                        sizeof(cm_info->loc_addr));
1563                 cm_info->vlan_id = child_listen_node->vlan_id;
1564                 if (child_listen_node->qhash_set) {
1565                         ret = i40iw_manage_qhash(iwdev, cm_info,
1566                                                  I40IW_QHASH_TYPE_TCP_SYN,
1567                                                  I40IW_QHASH_MANAGE_TYPE_DELETE,
1568                                                  NULL, false);
1569                         child_listen_node->qhash_set = false;
1570                 } else {
1571                         ret = I40IW_SUCCESS;
1572                 }
1573                 i40iw_debug(&iwdev->sc_dev,
1574                             I40IW_DEBUG_CM,
1575                             "freed pointer = %p\n",
1576                             child_listen_node);
1577                 kfree(child_listen_node);
1578                 cm_parent_listen_node->cm_core->stats_listen_nodes_destroyed++;
1579         }
1580         spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1581
1582         return ret;
1583 }
1584
1585 /**
1586  * i40iw_netdev_vlan_ipv6 - Gets the netdev and mac
1587  * @addr: local IPv6 address
1588  * @vlan_id: vlan id for the given IPv6 address
1589  * @mac: mac address for the given IPv6 address
1590  *
1591  * Returns the net_device of the IPv6 address and also sets the
1592  * vlan id and mac for that address.
1593  */
1594 static struct net_device *i40iw_netdev_vlan_ipv6(u32 *addr, u16 *vlan_id, u8 *mac)
1595 {
1596         struct net_device *ip_dev = NULL;
1597         struct in6_addr laddr6;
1598
1599         if (!IS_ENABLED(CONFIG_IPV6))
1600                 return NULL;
1601         i40iw_copy_ip_htonl(laddr6.in6_u.u6_addr32, addr);
1602         if (vlan_id)
1603                 *vlan_id = I40IW_NO_VLAN;
1604         if (mac)
1605                 eth_zero_addr(mac);
1606         rcu_read_lock();
1607         for_each_netdev_rcu(&init_net, ip_dev) {
1608                 if (ipv6_chk_addr(&init_net, &laddr6, ip_dev, 1)) {
1609                         if (vlan_id)
1610                                 *vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1611                         if (ip_dev->dev_addr && mac)
1612                                 ether_addr_copy(mac, ip_dev->dev_addr);
1613                         break;
1614                 }
1615         }
1616         rcu_read_unlock();
1617         return ip_dev;
1618 }
1619
1620 /**
1621  * i40iw_get_vlan_ipv4 - Returns the vlan_id for IPv4 address
1622  * @addr: local IPv4 address
1623  */
1624 static u16 i40iw_get_vlan_ipv4(u32 *addr)
1625 {
1626         struct net_device *netdev;
1627         u16 vlan_id = I40IW_NO_VLAN;
1628
1629         netdev = ip_dev_find(&init_net, htonl(addr[0]));
1630         if (netdev) {
1631                 vlan_id = rdma_vlan_dev_vlan_id(netdev);
1632                 dev_put(netdev);
1633         }
1634         return vlan_id;
1635 }
1636
1637 /**
1638  * i40iw_add_mqh_6 - Adds multiple qhashes for IPv6
1639  * @iwdev: iWarp device
1640  * @cm_info: CM info for parent listen node
1641  * @cm_parent_listen_node: The parent listen node
1642  *
1643  * Adds a qhash and a child listen node for every IPv6 address
1644  * on the adapter and adds the associated qhash filter
1645  */
1646 static enum i40iw_status_code i40iw_add_mqh_6(struct i40iw_device *iwdev,
1647                                               struct i40iw_cm_info *cm_info,
1648                                               struct i40iw_cm_listener *cm_parent_listen_node)
1649 {
1650         struct net_device *ip_dev;
1651         struct inet6_dev *idev;
1652         struct inet6_ifaddr *ifp, *tmp;
1653         enum i40iw_status_code ret = 0;
1654         struct i40iw_cm_listener *child_listen_node;
1655         unsigned long flags;
1656
1657         rtnl_lock();
1658         for_each_netdev_rcu(&init_net, ip_dev) {
1659                 if ((((rdma_vlan_dev_vlan_id(ip_dev) < I40IW_NO_VLAN) &&
1660                       (rdma_vlan_dev_real_dev(ip_dev) == iwdev->netdev)) ||
1661                      (ip_dev == iwdev->netdev)) && (ip_dev->flags & IFF_UP)) {
1662                         idev = __in6_dev_get(ip_dev);
1663                         if (!idev) {
1664                                 i40iw_pr_err("idev == NULL\n");
1665                                 break;
1666                         }
1667                         list_for_each_entry_safe(ifp, tmp, &idev->addr_list, if_list) {
1668                                 i40iw_debug(&iwdev->sc_dev,
1669                                             I40IW_DEBUG_CM,
1670                                             "IP=%pI6, vlan_id=%d, MAC=%pM\n",
1671                                             &ifp->addr,
1672                                             rdma_vlan_dev_vlan_id(ip_dev),
1673                                             ip_dev->dev_addr);
1674                                 child_listen_node =
1675                                         kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
1676                                 i40iw_debug(&iwdev->sc_dev,
1677                                             I40IW_DEBUG_CM,
1678                                             "Allocating child listener %p\n",
1679                                             child_listen_node);
1680                                 if (!child_listen_node) {
1681                                         ret = I40IW_ERR_NO_MEMORY;
1682                                         goto exit;
1683                                 }
1684                                 cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1685                                 cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1686
1687                                 memcpy(child_listen_node, cm_parent_listen_node,
1688                                        sizeof(*child_listen_node));
1689
1690                                 i40iw_copy_ip_ntohl(child_listen_node->loc_addr,
1691                                                     ifp->addr.in6_u.u6_addr32);
1692                                 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1693                                        sizeof(cm_info->loc_addr));
1694
1695                                 ret = i40iw_manage_qhash(iwdev, cm_info,
1696                                                          I40IW_QHASH_TYPE_TCP_SYN,
1697                                                          I40IW_QHASH_MANAGE_TYPE_ADD,
1698                                                          NULL, true);
1699                                 if (!ret) {
1700                                         child_listen_node->qhash_set = true;
1701                                         spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1702                                         list_add(&child_listen_node->child_listen_list,
1703                                                  &cm_parent_listen_node->child_listen_list);
1704                                         spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1705                                         cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
1706                                 } else {
1707                                         kfree(child_listen_node);
1708                                 }
1709                         }
1710                 }
1711         }
1712 exit:
1713         rtnl_unlock();
1714         return ret;
1715 }
1716
1717 /**
1718  * i40iw_add_mqh_4 - Adds multiple qhashes for IPv4
1719  * @iwdev: iWarp device
1720  * @cm_info: CM info for parent listen node
1721  * @cm_parent_listen_node: The parent listen node
1722  *
1723  * Adds a qhash and a child listen node for every IPv4 address
1724  * on the adapter and adds the associated qhash filter
1725  */
1726 static enum i40iw_status_code i40iw_add_mqh_4(
1727                                 struct i40iw_device *iwdev,
1728                                 struct i40iw_cm_info *cm_info,
1729                                 struct i40iw_cm_listener *cm_parent_listen_node)
1730 {
1731         struct net_device *dev;
1732         struct in_device *idev;
1733         struct i40iw_cm_listener *child_listen_node;
1734         enum i40iw_status_code ret = 0;
1735         unsigned long flags;
1736
1737         rtnl_lock();
1738         for_each_netdev(&init_net, dev) {
1739                 if ((((rdma_vlan_dev_vlan_id(dev) < I40IW_NO_VLAN) &&
1740                       (rdma_vlan_dev_real_dev(dev) == iwdev->netdev)) ||
1741                     (dev == iwdev->netdev)) && (dev->flags & IFF_UP)) {
1742                         idev = in_dev_get(dev);
1743                         for_ifa(idev) {
1744                                 i40iw_debug(&iwdev->sc_dev,
1745                                             I40IW_DEBUG_CM,
1746                                             "Allocating child CM Listener forIP=%pI4, vlan_id=%d, MAC=%pM\n",
1747                                             &ifa->ifa_address,
1748                                             rdma_vlan_dev_vlan_id(dev),
1749                                             dev->dev_addr);
1750                                 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
1751                                 cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
1752                                 i40iw_debug(&iwdev->sc_dev,
1753                                             I40IW_DEBUG_CM,
1754                                             "Allocating child listener %p\n",
1755                                             child_listen_node);
1756                                 if (!child_listen_node) {
1757                                         in_dev_put(idev);
1758                                         ret = I40IW_ERR_NO_MEMORY;
1759                                         goto exit;
1760                                 }
1761                                 cm_info->vlan_id = rdma_vlan_dev_vlan_id(dev);
1762                                 cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1763                                 memcpy(child_listen_node,
1764                                        cm_parent_listen_node,
1765                                        sizeof(*child_listen_node));
1766
1767                                 child_listen_node->loc_addr[0] = ntohl(ifa->ifa_address);
1768                                 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1769                                        sizeof(cm_info->loc_addr));
1770
1771                                 ret = i40iw_manage_qhash(iwdev,
1772                                                          cm_info,
1773                                                          I40IW_QHASH_TYPE_TCP_SYN,
1774                                                          I40IW_QHASH_MANAGE_TYPE_ADD,
1775                                                          NULL,
1776                                                          true);
1777                                 if (!ret) {
1778                                         child_listen_node->qhash_set = true;
1779                                         spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1780                                         list_add(&child_listen_node->child_listen_list,
1781                                                  &cm_parent_listen_node->child_listen_list);
1782                                         spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1783                                 } else {
1784                                         kfree(child_listen_node);
1785                                         cm_parent_listen_node->cm_core->stats_listen_nodes_created--;
1786                                 }
1787                         }
1788                         endfor_ifa(idev);
1789                         in_dev_put(idev);
1790                 }
1791         }
1792 exit:
1793         rtnl_unlock();
1794         return ret;
1795 }
1796
1797 /**
1798  * i40iw_dec_refcnt_listen - delete listener and associated cm nodes
1799  * @cm_core: cm's core
1800  * @free_hanging_nodes: to free associated cm_nodes
1801  * @apbvt_del: flag to delete the apbvt
1802  */
1803 static int i40iw_dec_refcnt_listen(struct i40iw_cm_core *cm_core,
1804                                    struct i40iw_cm_listener *listener,
1805                                    int free_hanging_nodes, bool apbvt_del)
1806 {
1807         int ret = -EINVAL;
1808         int err = 0;
1809         struct list_head *list_pos;
1810         struct list_head *list_temp;
1811         struct i40iw_cm_node *cm_node;
1812         struct list_head reset_list;
1813         struct i40iw_cm_info nfo;
1814         struct i40iw_cm_node *loopback;
1815         enum i40iw_cm_node_state old_state;
1816         unsigned long flags;
1817
1818         /* free non-accelerated child nodes for this listener */
1819         INIT_LIST_HEAD(&reset_list);
1820         if (free_hanging_nodes) {
1821                 spin_lock_irqsave(&cm_core->ht_lock, flags);
1822                 list_for_each_safe(list_pos, list_temp, &cm_core->connected_nodes) {
1823                         cm_node = container_of(list_pos, struct i40iw_cm_node, list);
1824                         if ((cm_node->listener == listener) && !cm_node->accelerated) {
1825                                 atomic_inc(&cm_node->ref_count);
1826                                 list_add(&cm_node->reset_entry, &reset_list);
1827                         }
1828                 }
1829                 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1830         }
1831
1832         list_for_each_safe(list_pos, list_temp, &reset_list) {
1833                 cm_node = container_of(list_pos, struct i40iw_cm_node, reset_entry);
1834                 loopback = cm_node->loopbackpartner;
1835                 if (cm_node->state >= I40IW_CM_STATE_FIN_WAIT1) {
1836                         i40iw_rem_ref_cm_node(cm_node);
1837                 } else {
1838                         if (!loopback) {
1839                                 i40iw_cleanup_retrans_entry(cm_node);
1840                                 err = i40iw_send_reset(cm_node);
1841                                 if (err) {
1842                                         cm_node->state = I40IW_CM_STATE_CLOSED;
1843                                         i40iw_pr_err("send reset\n");
1844                                 } else {
1845                                         old_state = cm_node->state;
1846                                         cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED;
1847                                         if (old_state != I40IW_CM_STATE_MPAREQ_RCVD)
1848                                                 i40iw_rem_ref_cm_node(cm_node);
1849                                 }
1850                         } else {
1851                                 struct i40iw_cm_event event;
1852
1853                                 event.cm_node = loopback;
1854                                 memcpy(event.cm_info.rem_addr,
1855                                        loopback->rem_addr, sizeof(event.cm_info.rem_addr));
1856                                 memcpy(event.cm_info.loc_addr,
1857                                        loopback->loc_addr, sizeof(event.cm_info.loc_addr));
1858                                 event.cm_info.rem_port = loopback->rem_port;
1859                                 event.cm_info.loc_port = loopback->loc_port;
1860                                 event.cm_info.cm_id = loopback->cm_id;
1861                                 event.cm_info.ipv4 = loopback->ipv4;
1862                                 atomic_inc(&loopback->ref_count);
1863                                 loopback->state = I40IW_CM_STATE_CLOSED;
1864                                 i40iw_event_connect_error(&event);
1865                                 cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED;
1866                                 i40iw_rem_ref_cm_node(cm_node);
1867                         }
1868                 }
1869         }
1870
1871         if (!atomic_dec_return(&listener->ref_count)) {
1872                 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1873                 list_del(&listener->list);
1874                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1875
1876                 if (listener->iwdev) {
1877                         if (apbvt_del && !i40iw_listen_port_in_use(cm_core, listener->loc_port))
1878                                 i40iw_manage_apbvt(listener->iwdev,
1879                                                    listener->loc_port,
1880                                                    I40IW_MANAGE_APBVT_DEL);
1881
1882                         memcpy(nfo.loc_addr, listener->loc_addr, sizeof(nfo.loc_addr));
1883                         nfo.loc_port = listener->loc_port;
1884                         nfo.ipv4 = listener->ipv4;
1885                         nfo.vlan_id = listener->vlan_id;
1886                         nfo.user_pri = listener->user_pri;
1887
1888                         if (!list_empty(&listener->child_listen_list)) {
1889                                 i40iw_del_multiple_qhash(listener->iwdev, &nfo, listener);
1890                         } else {
1891                                 if (listener->qhash_set)
1892                                         i40iw_manage_qhash(listener->iwdev,
1893                                                            &nfo,
1894                                                            I40IW_QHASH_TYPE_TCP_SYN,
1895                                                            I40IW_QHASH_MANAGE_TYPE_DELETE,
1896                                                            NULL,
1897                                                            false);
1898                         }
1899                 }
1900
1901                 cm_core->stats_listen_destroyed++;
1902                 kfree(listener);
1903                 cm_core->stats_listen_nodes_destroyed++;
1904                 listener = NULL;
1905                 ret = 0;
1906         }
1907
1908         if (listener) {
1909                 if (atomic_read(&listener->pend_accepts_cnt) > 0)
1910                         i40iw_debug(cm_core->dev,
1911                                     I40IW_DEBUG_CM,
1912                                     "%s: listener (%p) pending accepts=%u\n",
1913                                     __func__,
1914                                     listener,
1915                                     atomic_read(&listener->pend_accepts_cnt));
1916         }
1917
1918         return ret;
1919 }
1920
1921 /**
1922  * i40iw_cm_del_listen - delete a linstener
1923  * @cm_core: cm's core
1924   * @listener: passive connection's listener
1925  * @apbvt_del: flag to delete apbvt
1926  */
1927 static int i40iw_cm_del_listen(struct i40iw_cm_core *cm_core,
1928                                struct i40iw_cm_listener *listener,
1929                                bool apbvt_del)
1930 {
1931         listener->listener_state = I40IW_CM_LISTENER_PASSIVE_STATE;
1932         listener->cm_id = NULL; /* going to be destroyed pretty soon */
1933         return i40iw_dec_refcnt_listen(cm_core, listener, 1, apbvt_del);
1934 }
1935
1936 /**
1937  * i40iw_addr_resolve_neigh - resolve neighbor address
1938  * @iwdev: iwarp device structure
1939  * @src_ip: local ip address
1940  * @dst_ip: remote ip address
1941  * @arpindex: if there is an arp entry
1942  */
1943 static int i40iw_addr_resolve_neigh(struct i40iw_device *iwdev,
1944                                     u32 src_ip,
1945                                     u32 dst_ip,
1946                                     int arpindex)
1947 {
1948         struct rtable *rt;
1949         struct neighbour *neigh;
1950         int rc = arpindex;
1951         struct net_device *netdev = iwdev->netdev;
1952         __be32 dst_ipaddr = htonl(dst_ip);
1953         __be32 src_ipaddr = htonl(src_ip);
1954
1955         rt = ip_route_output(&init_net, dst_ipaddr, src_ipaddr, 0, 0);
1956         if (IS_ERR(rt)) {
1957                 i40iw_pr_err("ip_route_output\n");
1958                 return rc;
1959         }
1960
1961         if (netif_is_bond_slave(netdev))
1962                 netdev = netdev_master_upper_dev_get(netdev);
1963
1964         neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr);
1965
1966         rcu_read_lock();
1967         if (neigh) {
1968                 if (neigh->nud_state & NUD_VALID) {
1969                         if (arpindex >= 0) {
1970                                 if (ether_addr_equal(iwdev->arp_table[arpindex].mac_addr,
1971                                                      neigh->ha))
1972                                         /* Mac address same as arp table */
1973                                         goto resolve_neigh_exit;
1974                                 i40iw_manage_arp_cache(iwdev,
1975                                                        iwdev->arp_table[arpindex].mac_addr,
1976                                                        &dst_ip,
1977                                                        true,
1978                                                        I40IW_ARP_DELETE);
1979                         }
1980
1981                         i40iw_manage_arp_cache(iwdev, neigh->ha, &dst_ip, true, I40IW_ARP_ADD);
1982                         rc = i40iw_arp_table(iwdev, &dst_ip, true, NULL, I40IW_ARP_RESOLVE);
1983                 } else {
1984                         neigh_event_send(neigh, NULL);
1985                 }
1986         }
1987  resolve_neigh_exit:
1988
1989         rcu_read_unlock();
1990         if (neigh)
1991                 neigh_release(neigh);
1992
1993         ip_rt_put(rt);
1994         return rc;
1995 }
1996
1997 /**
1998  * i40iw_get_dst_ipv6
1999  */
2000 static struct dst_entry *i40iw_get_dst_ipv6(struct sockaddr_in6 *src_addr,
2001                                             struct sockaddr_in6 *dst_addr)
2002 {
2003         struct dst_entry *dst;
2004         struct flowi6 fl6;
2005
2006         memset(&fl6, 0, sizeof(fl6));
2007         fl6.daddr = dst_addr->sin6_addr;
2008         fl6.saddr = src_addr->sin6_addr;
2009         if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
2010                 fl6.flowi6_oif = dst_addr->sin6_scope_id;
2011
2012         dst = ip6_route_output(&init_net, NULL, &fl6);
2013         return dst;
2014 }
2015
2016 /**
2017  * i40iw_addr_resolve_neigh_ipv6 - resolve neighbor ipv6 address
2018  * @iwdev: iwarp device structure
2019  * @dst_ip: remote ip address
2020  * @arpindex: if there is an arp entry
2021  */
2022 static int i40iw_addr_resolve_neigh_ipv6(struct i40iw_device *iwdev,
2023                                          u32 *src,
2024                                          u32 *dest,
2025                                          int arpindex)
2026 {
2027         struct neighbour *neigh;
2028         int rc = arpindex;
2029         struct net_device *netdev = iwdev->netdev;
2030         struct dst_entry *dst;
2031         struct sockaddr_in6 dst_addr;
2032         struct sockaddr_in6 src_addr;
2033
2034         memset(&dst_addr, 0, sizeof(dst_addr));
2035         dst_addr.sin6_family = AF_INET6;
2036         i40iw_copy_ip_htonl(dst_addr.sin6_addr.in6_u.u6_addr32, dest);
2037         memset(&src_addr, 0, sizeof(src_addr));
2038         src_addr.sin6_family = AF_INET6;
2039         i40iw_copy_ip_htonl(src_addr.sin6_addr.in6_u.u6_addr32, src);
2040         dst = i40iw_get_dst_ipv6(&src_addr, &dst_addr);
2041         if (!dst || dst->error) {
2042                 if (dst) {
2043                         dst_release(dst);
2044                         i40iw_pr_err("ip6_route_output returned dst->error = %d\n",
2045                                      dst->error);
2046                 }
2047                 return rc;
2048         }
2049
2050         if (netif_is_bond_slave(netdev))
2051                 netdev = netdev_master_upper_dev_get(netdev);
2052
2053         neigh = dst_neigh_lookup(dst, &dst_addr);
2054
2055         rcu_read_lock();
2056         if (neigh) {
2057                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "dst_neigh_lookup MAC=%pM\n", neigh->ha);
2058                 if (neigh->nud_state & NUD_VALID) {
2059                         if (arpindex >= 0) {
2060                                 if (ether_addr_equal
2061                                     (iwdev->arp_table[arpindex].mac_addr,
2062                                      neigh->ha)) {
2063                                         /* Mac address same as in arp table */
2064                                         goto resolve_neigh_exit6;
2065                                 }
2066                                 i40iw_manage_arp_cache(iwdev,
2067                                                        iwdev->arp_table[arpindex].mac_addr,
2068                                                        dest,
2069                                                        false,
2070                                                        I40IW_ARP_DELETE);
2071                         }
2072                         i40iw_manage_arp_cache(iwdev,
2073                                                neigh->ha,
2074                                                dest,
2075                                                false,
2076                                                I40IW_ARP_ADD);
2077                         rc = i40iw_arp_table(iwdev,
2078                                              dest,
2079                                              false,
2080                                              NULL,
2081                                              I40IW_ARP_RESOLVE);
2082                 } else {
2083                         neigh_event_send(neigh, NULL);
2084                 }
2085         }
2086
2087  resolve_neigh_exit6:
2088         rcu_read_unlock();
2089         if (neigh)
2090                 neigh_release(neigh);
2091         dst_release(dst);
2092         return rc;
2093 }
2094
2095 /**
2096  * i40iw_ipv4_is_loopback - check if loopback
2097  * @loc_addr: local addr to compare
2098  * @rem_addr: remote address
2099  */
2100 static bool i40iw_ipv4_is_loopback(u32 loc_addr, u32 rem_addr)
2101 {
2102         return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr);
2103 }
2104
2105 /**
2106  * i40iw_ipv6_is_loopback - check if loopback
2107  * @loc_addr: local addr to compare
2108  * @rem_addr: remote address
2109  */
2110 static bool i40iw_ipv6_is_loopback(u32 *loc_addr, u32 *rem_addr)
2111 {
2112         struct in6_addr raddr6;
2113
2114         i40iw_copy_ip_htonl(raddr6.in6_u.u6_addr32, rem_addr);
2115         return !memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6);
2116 }
2117
2118 /**
2119  * i40iw_make_cm_node - create a new instance of a cm node
2120  * @cm_core: cm's core
2121  * @iwdev: iwarp device structure
2122  * @cm_info: quad info for connection
2123  * @listener: passive connection's listener
2124  */
2125 static struct i40iw_cm_node *i40iw_make_cm_node(
2126                                    struct i40iw_cm_core *cm_core,
2127                                    struct i40iw_device *iwdev,
2128                                    struct i40iw_cm_info *cm_info,
2129                                    struct i40iw_cm_listener *listener)
2130 {
2131         struct i40iw_cm_node *cm_node;
2132         struct timespec ts;
2133         int oldarpindex;
2134         int arpindex;
2135         struct net_device *netdev = iwdev->netdev;
2136
2137         /* create an hte and cm_node for this instance */
2138         cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
2139         if (!cm_node)
2140                 return NULL;
2141
2142         /* set our node specific transport info */
2143         cm_node->ipv4 = cm_info->ipv4;
2144         cm_node->vlan_id = cm_info->vlan_id;
2145         if ((cm_node->vlan_id == I40IW_NO_VLAN) && iwdev->dcb)
2146                 cm_node->vlan_id = 0;
2147         cm_node->tos = cm_info->tos;
2148         cm_node->user_pri = cm_info->user_pri;
2149         if (listener) {
2150                 if (listener->tos != cm_info->tos)
2151                         i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB,
2152                                     "application TOS[%d] and remote client TOS[%d] mismatch\n",
2153                                      listener->tos, cm_info->tos);
2154                 cm_node->tos = max(listener->tos, cm_info->tos);
2155                 cm_node->user_pri = rt_tos2priority(cm_node->tos);
2156                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB, "listener: TOS:[%d] UP:[%d]\n",
2157                             cm_node->tos, cm_node->user_pri);
2158         }
2159         memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr));
2160         memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr));
2161         cm_node->loc_port = cm_info->loc_port;
2162         cm_node->rem_port = cm_info->rem_port;
2163
2164         cm_node->mpa_frame_rev = iwdev->mpa_version;
2165         cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
2166         cm_node->ird_size = I40IW_MAX_IRD_SIZE;
2167         cm_node->ord_size = I40IW_MAX_ORD_SIZE;
2168
2169         cm_node->listener = listener;
2170         cm_node->cm_id = cm_info->cm_id;
2171         ether_addr_copy(cm_node->loc_mac, netdev->dev_addr);
2172         spin_lock_init(&cm_node->retrans_list_lock);
2173
2174         atomic_set(&cm_node->ref_count, 1);
2175         /* associate our parent CM core */
2176         cm_node->cm_core = cm_core;
2177         cm_node->tcp_cntxt.loc_id = I40IW_CM_DEF_LOCAL_ID;
2178         cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE;
2179         cm_node->tcp_cntxt.rcv_wnd =
2180                         I40IW_CM_DEFAULT_RCV_WND_SCALED >> I40IW_CM_DEFAULT_RCV_WND_SCALE;
2181         ts = current_kernel_time();
2182         cm_node->tcp_cntxt.loc_seq_num = ts.tv_nsec;
2183         cm_node->tcp_cntxt.mss = iwdev->vsi.mss;
2184
2185         cm_node->iwdev = iwdev;
2186         cm_node->dev = &iwdev->sc_dev;
2187
2188         if ((cm_node->ipv4 &&
2189              i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
2190              (!cm_node->ipv4 && i40iw_ipv6_is_loopback(cm_node->loc_addr,
2191                                                        cm_node->rem_addr))) {
2192                 arpindex = i40iw_arp_table(iwdev,
2193                                            cm_node->rem_addr,
2194                                            false,
2195                                            NULL,
2196                                            I40IW_ARP_RESOLVE);
2197         } else {
2198                 oldarpindex = i40iw_arp_table(iwdev,
2199                                               cm_node->rem_addr,
2200                                               false,
2201                                               NULL,
2202                                               I40IW_ARP_RESOLVE);
2203                 if (cm_node->ipv4)
2204                         arpindex = i40iw_addr_resolve_neigh(iwdev,
2205                                                             cm_info->loc_addr[0],
2206                                                             cm_info->rem_addr[0],
2207                                                             oldarpindex);
2208                 else if (IS_ENABLED(CONFIG_IPV6))
2209                         arpindex = i40iw_addr_resolve_neigh_ipv6(iwdev,
2210                                                                  cm_info->loc_addr,
2211                                                                  cm_info->rem_addr,
2212                                                                  oldarpindex);
2213                 else
2214                         arpindex = -EINVAL;
2215         }
2216         if (arpindex < 0) {
2217                 i40iw_pr_err("cm_node arpindex\n");
2218                 kfree(cm_node);
2219                 return NULL;
2220         }
2221         ether_addr_copy(cm_node->rem_mac, iwdev->arp_table[arpindex].mac_addr);
2222         i40iw_add_hte_node(cm_core, cm_node);
2223         cm_core->stats_nodes_created++;
2224         return cm_node;
2225 }
2226
2227 /**
2228  * i40iw_rem_ref_cm_node - destroy an instance of a cm node
2229  * @cm_node: connection's node
2230  */
2231 static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *cm_node)
2232 {
2233         struct i40iw_cm_core *cm_core = cm_node->cm_core;
2234         struct i40iw_qp *iwqp;
2235         struct i40iw_cm_info nfo;
2236         unsigned long flags;
2237
2238         spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
2239         if (atomic_dec_return(&cm_node->ref_count)) {
2240                 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
2241                 return;
2242         }
2243         list_del(&cm_node->list);
2244         spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
2245
2246         /* if the node is destroyed before connection was accelerated */
2247         if (!cm_node->accelerated && cm_node->accept_pend) {
2248                 pr_err("node destroyed before established\n");
2249                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
2250         }
2251         if (cm_node->close_entry)
2252                 i40iw_handle_close_entry(cm_node, 0);
2253         if (cm_node->listener) {
2254                 i40iw_dec_refcnt_listen(cm_core, cm_node->listener, 0, true);
2255         } else {
2256                 if (!i40iw_listen_port_in_use(cm_core, cm_node->loc_port) &&
2257                     cm_node->apbvt_set) {
2258                         i40iw_manage_apbvt(cm_node->iwdev,
2259                                            cm_node->loc_port,
2260                                            I40IW_MANAGE_APBVT_DEL);
2261                         i40iw_get_addr_info(cm_node, &nfo);
2262                         if (cm_node->qhash_set) {
2263                                 i40iw_manage_qhash(cm_node->iwdev,
2264                                                    &nfo,
2265                                                    I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2266                                                    I40IW_QHASH_MANAGE_TYPE_DELETE,
2267                                                    NULL,
2268                                                    false);
2269                                 cm_node->qhash_set = 0;
2270                         }
2271                 }
2272         }
2273
2274         iwqp = cm_node->iwqp;
2275         if (iwqp) {
2276                 iwqp->cm_node = NULL;
2277                 i40iw_rem_ref(&iwqp->ibqp);
2278                 cm_node->iwqp = NULL;
2279         } else if (cm_node->qhash_set) {
2280                 i40iw_get_addr_info(cm_node, &nfo);
2281                 i40iw_manage_qhash(cm_node->iwdev,
2282                                    &nfo,
2283                                    I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2284                                    I40IW_QHASH_MANAGE_TYPE_DELETE,
2285                                    NULL,
2286                                    false);
2287                 cm_node->qhash_set = 0;
2288         }
2289
2290         cm_node->cm_core->stats_nodes_destroyed++;
2291         kfree(cm_node);
2292 }
2293
2294 /**
2295  * i40iw_handle_fin_pkt - FIN packet received
2296  * @cm_node: connection's node
2297  */
2298 static void i40iw_handle_fin_pkt(struct i40iw_cm_node *cm_node)
2299 {
2300         u32 ret;
2301
2302         switch (cm_node->state) {
2303         case I40IW_CM_STATE_SYN_RCVD:
2304         case I40IW_CM_STATE_SYN_SENT:
2305         case I40IW_CM_STATE_ESTABLISHED:
2306         case I40IW_CM_STATE_MPAREJ_RCVD:
2307                 cm_node->tcp_cntxt.rcv_nxt++;
2308                 i40iw_cleanup_retrans_entry(cm_node);
2309                 cm_node->state = I40IW_CM_STATE_LAST_ACK;
2310                 i40iw_send_fin(cm_node);
2311                 break;
2312         case I40IW_CM_STATE_MPAREQ_SENT:
2313                 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
2314                 cm_node->tcp_cntxt.rcv_nxt++;
2315                 i40iw_cleanup_retrans_entry(cm_node);
2316                 cm_node->state = I40IW_CM_STATE_CLOSED;
2317                 atomic_inc(&cm_node->ref_count);
2318                 i40iw_send_reset(cm_node);
2319                 break;
2320         case I40IW_CM_STATE_FIN_WAIT1:
2321                 cm_node->tcp_cntxt.rcv_nxt++;
2322                 i40iw_cleanup_retrans_entry(cm_node);
2323                 cm_node->state = I40IW_CM_STATE_CLOSING;
2324                 i40iw_send_ack(cm_node);
2325                 /*
2326                  * Wait for ACK as this is simultaneous close.
2327                  * After we receive ACK, do not send anything.
2328                  * Just rm the node.
2329                  */
2330                 break;
2331         case I40IW_CM_STATE_FIN_WAIT2:
2332                 cm_node->tcp_cntxt.rcv_nxt++;
2333                 i40iw_cleanup_retrans_entry(cm_node);
2334                 cm_node->state = I40IW_CM_STATE_TIME_WAIT;
2335                 i40iw_send_ack(cm_node);
2336                 ret =
2337                     i40iw_schedule_cm_timer(cm_node, NULL, I40IW_TIMER_TYPE_CLOSE, 1, 0);
2338                 if (ret)
2339                         i40iw_pr_err("node %p state = %d\n", cm_node, cm_node->state);
2340                 break;
2341         case I40IW_CM_STATE_TIME_WAIT:
2342                 cm_node->tcp_cntxt.rcv_nxt++;
2343                 i40iw_cleanup_retrans_entry(cm_node);
2344                 cm_node->state = I40IW_CM_STATE_CLOSED;
2345                 i40iw_rem_ref_cm_node(cm_node);
2346                 break;
2347         case I40IW_CM_STATE_OFFLOADED:
2348         default:
2349                 i40iw_pr_err("bad state node %p state = %d\n", cm_node, cm_node->state);
2350                 break;
2351         }
2352 }
2353
2354 /**
2355  * i40iw_handle_rst_pkt - process received RST packet
2356  * @cm_node: connection's node
2357  * @rbuf: receive buffer
2358  */
2359 static void i40iw_handle_rst_pkt(struct i40iw_cm_node *cm_node,
2360                                  struct i40iw_puda_buf *rbuf)
2361 {
2362         i40iw_cleanup_retrans_entry(cm_node);
2363         switch (cm_node->state) {
2364         case I40IW_CM_STATE_SYN_SENT:
2365         case I40IW_CM_STATE_MPAREQ_SENT:
2366                 switch (cm_node->mpa_frame_rev) {
2367                 case IETF_MPA_V2:
2368                         cm_node->mpa_frame_rev = IETF_MPA_V1;
2369                         /* send a syn and goto syn sent state */
2370                         cm_node->state = I40IW_CM_STATE_SYN_SENT;
2371                         if (i40iw_send_syn(cm_node, 0))
2372                                 i40iw_active_open_err(cm_node, false);
2373                         break;
2374                 case IETF_MPA_V1:
2375                 default:
2376                         i40iw_active_open_err(cm_node, false);
2377                         break;
2378                 }
2379                 break;
2380         case I40IW_CM_STATE_MPAREQ_RCVD:
2381                 atomic_add_return(1, &cm_node->passive_state);
2382                 break;
2383         case I40IW_CM_STATE_ESTABLISHED:
2384         case I40IW_CM_STATE_SYN_RCVD:
2385         case I40IW_CM_STATE_LISTENING:
2386                 i40iw_pr_err("Bad state state = %d\n", cm_node->state);
2387                 i40iw_passive_open_err(cm_node, false);
2388                 break;
2389         case I40IW_CM_STATE_OFFLOADED:
2390                 i40iw_active_open_err(cm_node, false);
2391                 break;
2392         case I40IW_CM_STATE_CLOSED:
2393                 break;
2394         case I40IW_CM_STATE_FIN_WAIT2:
2395         case I40IW_CM_STATE_FIN_WAIT1:
2396         case I40IW_CM_STATE_LAST_ACK:
2397                 cm_node->cm_id->rem_ref(cm_node->cm_id);
2398         case I40IW_CM_STATE_TIME_WAIT:
2399                 cm_node->state = I40IW_CM_STATE_CLOSED;
2400                 i40iw_rem_ref_cm_node(cm_node);
2401                 break;
2402         default:
2403                 break;
2404         }
2405 }
2406
2407 /**
2408  * i40iw_handle_rcv_mpa - Process a recv'd mpa buffer
2409  * @cm_node: connection's node
2410  * @rbuf: receive buffer
2411  */
2412 static void i40iw_handle_rcv_mpa(struct i40iw_cm_node *cm_node,
2413                                  struct i40iw_puda_buf *rbuf)
2414 {
2415         int ret;
2416         int datasize = rbuf->datalen;
2417         u8 *dataloc = rbuf->data;
2418
2419         enum i40iw_cm_event_type type = I40IW_CM_EVENT_UNKNOWN;
2420         u32 res_type;
2421
2422         ret = i40iw_parse_mpa(cm_node, dataloc, &res_type, datasize);
2423         if (ret) {
2424                 if (cm_node->state == I40IW_CM_STATE_MPAREQ_SENT)
2425                         i40iw_active_open_err(cm_node, true);
2426                 else
2427                         i40iw_passive_open_err(cm_node, true);
2428                 return;
2429         }
2430
2431         switch (cm_node->state) {
2432         case I40IW_CM_STATE_ESTABLISHED:
2433                 if (res_type == I40IW_MPA_REQUEST_REJECT)
2434                         i40iw_pr_err("state for reject\n");
2435                 cm_node->state = I40IW_CM_STATE_MPAREQ_RCVD;
2436                 type = I40IW_CM_EVENT_MPA_REQ;
2437                 i40iw_send_ack(cm_node);        /* ACK received MPA request */
2438                 atomic_set(&cm_node->passive_state,
2439                            I40IW_PASSIVE_STATE_INDICATED);
2440                 break;
2441         case I40IW_CM_STATE_MPAREQ_SENT:
2442                 i40iw_cleanup_retrans_entry(cm_node);
2443                 if (res_type == I40IW_MPA_REQUEST_REJECT) {
2444                         type = I40IW_CM_EVENT_MPA_REJECT;
2445                         cm_node->state = I40IW_CM_STATE_MPAREJ_RCVD;
2446                 } else {
2447                         type = I40IW_CM_EVENT_CONNECTED;
2448                         cm_node->state = I40IW_CM_STATE_OFFLOADED;
2449                         i40iw_send_ack(cm_node);
2450                 }
2451                 break;
2452         default:
2453                 pr_err("%s wrong cm_node state =%d\n", __func__, cm_node->state);
2454                 break;
2455         }
2456         i40iw_create_event(cm_node, type);
2457 }
2458
2459 /**
2460  * i40iw_indicate_pkt_err - Send up err event to cm
2461  * @cm_node: connection's node
2462  */
2463 static void i40iw_indicate_pkt_err(struct i40iw_cm_node *cm_node)
2464 {
2465         switch (cm_node->state) {
2466         case I40IW_CM_STATE_SYN_SENT:
2467         case I40IW_CM_STATE_MPAREQ_SENT:
2468                 i40iw_active_open_err(cm_node, true);
2469                 break;
2470         case I40IW_CM_STATE_ESTABLISHED:
2471         case I40IW_CM_STATE_SYN_RCVD:
2472                 i40iw_passive_open_err(cm_node, true);
2473                 break;
2474         case I40IW_CM_STATE_OFFLOADED:
2475         default:
2476                 break;
2477         }
2478 }
2479
2480 /**
2481  * i40iw_check_syn - Check for error on received syn ack
2482  * @cm_node: connection's node
2483  * @tcph: pointer tcp header
2484  */
2485 static int i40iw_check_syn(struct i40iw_cm_node *cm_node, struct tcphdr *tcph)
2486 {
2487         int err = 0;
2488
2489         if (ntohl(tcph->ack_seq) != cm_node->tcp_cntxt.loc_seq_num) {
2490                 err = 1;
2491                 i40iw_active_open_err(cm_node, true);
2492         }
2493         return err;
2494 }
2495
2496 /**
2497  * i40iw_check_seq - check seq numbers if OK
2498  * @cm_node: connection's node
2499  * @tcph: pointer tcp header
2500  */
2501 static int i40iw_check_seq(struct i40iw_cm_node *cm_node, struct tcphdr *tcph)
2502 {
2503         int err = 0;
2504         u32 seq;
2505         u32 ack_seq;
2506         u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
2507         u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
2508         u32 rcv_wnd;
2509
2510         seq = ntohl(tcph->seq);
2511         ack_seq = ntohl(tcph->ack_seq);
2512         rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
2513         if (ack_seq != loc_seq_num)
2514                 err = -1;
2515         else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
2516                 err = -1;
2517         if (err) {
2518                 i40iw_pr_err("seq number\n");
2519                 i40iw_indicate_pkt_err(cm_node);
2520         }
2521         return err;
2522 }
2523
2524 /**
2525  * i40iw_handle_syn_pkt - is for Passive node
2526  * @cm_node: connection's node
2527  * @rbuf: receive buffer
2528  */
2529 static void i40iw_handle_syn_pkt(struct i40iw_cm_node *cm_node,
2530                                  struct i40iw_puda_buf *rbuf)
2531 {
2532         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2533         int ret;
2534         u32 inc_sequence;
2535         int optionsize;
2536         struct i40iw_cm_info nfo;
2537
2538         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2539         inc_sequence = ntohl(tcph->seq);
2540
2541         switch (cm_node->state) {
2542         case I40IW_CM_STATE_SYN_SENT:
2543         case I40IW_CM_STATE_MPAREQ_SENT:
2544                 /* Rcvd syn on active open connection */
2545                 i40iw_active_open_err(cm_node, 1);
2546                 break;
2547         case I40IW_CM_STATE_LISTENING:
2548                 /* Passive OPEN */
2549                 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
2550                     cm_node->listener->backlog) {
2551                         cm_node->cm_core->stats_backlog_drops++;
2552                         i40iw_passive_open_err(cm_node, false);
2553                         break;
2554                 }
2555                 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1);
2556                 if (ret) {
2557                         i40iw_passive_open_err(cm_node, false);
2558                         /* drop pkt */
2559                         break;
2560                 }
2561                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2562                 cm_node->accept_pend = 1;
2563                 atomic_inc(&cm_node->listener->pend_accepts_cnt);
2564
2565                 cm_node->state = I40IW_CM_STATE_SYN_RCVD;
2566                 i40iw_get_addr_info(cm_node, &nfo);
2567                 ret = i40iw_manage_qhash(cm_node->iwdev,
2568                                          &nfo,
2569                                          I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2570                                          I40IW_QHASH_MANAGE_TYPE_ADD,
2571                                          (void *)cm_node,
2572                                          false);
2573                 cm_node->qhash_set = true;
2574                 break;
2575         case I40IW_CM_STATE_CLOSED:
2576                 i40iw_cleanup_retrans_entry(cm_node);
2577                 atomic_inc(&cm_node->ref_count);
2578                 i40iw_send_reset(cm_node);
2579                 break;
2580         case I40IW_CM_STATE_OFFLOADED:
2581         case I40IW_CM_STATE_ESTABLISHED:
2582         case I40IW_CM_STATE_FIN_WAIT1:
2583         case I40IW_CM_STATE_FIN_WAIT2:
2584         case I40IW_CM_STATE_MPAREQ_RCVD:
2585         case I40IW_CM_STATE_LAST_ACK:
2586         case I40IW_CM_STATE_CLOSING:
2587         case I40IW_CM_STATE_UNKNOWN:
2588         default:
2589                 break;
2590         }
2591 }
2592
2593 /**
2594  * i40iw_handle_synack_pkt - Process SYN+ACK packet (active side)
2595  * @cm_node: connection's node
2596  * @rbuf: receive buffer
2597  */
2598 static void i40iw_handle_synack_pkt(struct i40iw_cm_node *cm_node,
2599                                     struct i40iw_puda_buf *rbuf)
2600 {
2601         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2602         int ret;
2603         u32 inc_sequence;
2604         int optionsize;
2605
2606         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2607         inc_sequence = ntohl(tcph->seq);
2608         switch (cm_node->state) {
2609         case I40IW_CM_STATE_SYN_SENT:
2610                 i40iw_cleanup_retrans_entry(cm_node);
2611                 /* active open */
2612                 if (i40iw_check_syn(cm_node, tcph)) {
2613                         i40iw_pr_err("check syn fail\n");
2614                         return;
2615                 }
2616                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2617                 /* setup options */
2618                 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 0);
2619                 if (ret) {
2620                         i40iw_debug(cm_node->dev,
2621                                     I40IW_DEBUG_CM,
2622                                     "cm_node=%p tcp_options failed\n",
2623                                     cm_node);
2624                         break;
2625                 }
2626                 i40iw_cleanup_retrans_entry(cm_node);
2627                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2628                 i40iw_send_ack(cm_node);        /* ACK  for the syn_ack */
2629                 ret = i40iw_send_mpa_request(cm_node);
2630                 if (ret) {
2631                         i40iw_debug(cm_node->dev,
2632                                     I40IW_DEBUG_CM,
2633                                     "cm_node=%p i40iw_send_mpa_request failed\n",
2634                                     cm_node);
2635                         break;
2636                 }
2637                 cm_node->state = I40IW_CM_STATE_MPAREQ_SENT;
2638                 break;
2639         case I40IW_CM_STATE_MPAREQ_RCVD:
2640                 i40iw_passive_open_err(cm_node, true);
2641                 break;
2642         case I40IW_CM_STATE_LISTENING:
2643                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2644                 i40iw_cleanup_retrans_entry(cm_node);
2645                 cm_node->state = I40IW_CM_STATE_CLOSED;
2646                 i40iw_send_reset(cm_node);
2647                 break;
2648         case I40IW_CM_STATE_CLOSED:
2649                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2650                 i40iw_cleanup_retrans_entry(cm_node);
2651                 atomic_inc(&cm_node->ref_count);
2652                 i40iw_send_reset(cm_node);
2653                 break;
2654         case I40IW_CM_STATE_ESTABLISHED:
2655         case I40IW_CM_STATE_FIN_WAIT1:
2656         case I40IW_CM_STATE_FIN_WAIT2:
2657         case I40IW_CM_STATE_LAST_ACK:
2658         case I40IW_CM_STATE_OFFLOADED:
2659         case I40IW_CM_STATE_CLOSING:
2660         case I40IW_CM_STATE_UNKNOWN:
2661         case I40IW_CM_STATE_MPAREQ_SENT:
2662         default:
2663                 break;
2664         }
2665 }
2666
2667 /**
2668  * i40iw_handle_ack_pkt - process packet with ACK
2669  * @cm_node: connection's node
2670  * @rbuf: receive buffer
2671  */
2672 static int i40iw_handle_ack_pkt(struct i40iw_cm_node *cm_node,
2673                                 struct i40iw_puda_buf *rbuf)
2674 {
2675         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2676         u32 inc_sequence;
2677         int ret = 0;
2678         int optionsize;
2679         u32 datasize = rbuf->datalen;
2680
2681         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2682
2683         if (i40iw_check_seq(cm_node, tcph))
2684                 return -EINVAL;
2685
2686         inc_sequence = ntohl(tcph->seq);
2687         switch (cm_node->state) {
2688         case I40IW_CM_STATE_SYN_RCVD:
2689                 i40iw_cleanup_retrans_entry(cm_node);
2690                 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1);
2691                 if (ret)
2692                         break;
2693                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2694                 cm_node->state = I40IW_CM_STATE_ESTABLISHED;
2695                 if (datasize) {
2696                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2697                         i40iw_handle_rcv_mpa(cm_node, rbuf);
2698                 }
2699                 break;
2700         case I40IW_CM_STATE_ESTABLISHED:
2701                 i40iw_cleanup_retrans_entry(cm_node);
2702                 if (datasize) {
2703                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2704                         i40iw_handle_rcv_mpa(cm_node, rbuf);
2705                 }
2706                 break;
2707         case I40IW_CM_STATE_MPAREQ_SENT:
2708                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2709                 if (datasize) {
2710                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2711                         i40iw_handle_rcv_mpa(cm_node, rbuf);
2712                 }
2713                 break;
2714         case I40IW_CM_STATE_LISTENING:
2715                 i40iw_cleanup_retrans_entry(cm_node);
2716                 cm_node->state = I40IW_CM_STATE_CLOSED;
2717                 i40iw_send_reset(cm_node);
2718                 break;
2719         case I40IW_CM_STATE_CLOSED:
2720                 i40iw_cleanup_retrans_entry(cm_node);
2721                 atomic_inc(&cm_node->ref_count);
2722                 i40iw_send_reset(cm_node);
2723                 break;
2724         case I40IW_CM_STATE_LAST_ACK:
2725         case I40IW_CM_STATE_CLOSING:
2726                 i40iw_cleanup_retrans_entry(cm_node);
2727                 cm_node->state = I40IW_CM_STATE_CLOSED;
2728                 if (!cm_node->accept_pend)
2729                         cm_node->cm_id->rem_ref(cm_node->cm_id);
2730                 i40iw_rem_ref_cm_node(cm_node);
2731                 break;
2732         case I40IW_CM_STATE_FIN_WAIT1:
2733                 i40iw_cleanup_retrans_entry(cm_node);
2734                 cm_node->state = I40IW_CM_STATE_FIN_WAIT2;
2735                 break;
2736         case I40IW_CM_STATE_SYN_SENT:
2737         case I40IW_CM_STATE_FIN_WAIT2:
2738         case I40IW_CM_STATE_OFFLOADED:
2739         case I40IW_CM_STATE_MPAREQ_RCVD:
2740         case I40IW_CM_STATE_UNKNOWN:
2741         default:
2742                 i40iw_cleanup_retrans_entry(cm_node);
2743                 break;
2744         }
2745         return ret;
2746 }
2747
2748 /**
2749  * i40iw_process_packet - process cm packet
2750  * @cm_node: connection's node
2751  * @rbuf: receive buffer
2752  */
2753 static void i40iw_process_packet(struct i40iw_cm_node *cm_node,
2754                                  struct i40iw_puda_buf *rbuf)
2755 {
2756         enum i40iw_tcpip_pkt_type pkt_type = I40IW_PKT_TYPE_UNKNOWN;
2757         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2758         u32 fin_set = 0;
2759         int ret;
2760
2761         if (tcph->rst) {
2762                 pkt_type = I40IW_PKT_TYPE_RST;
2763         } else if (tcph->syn) {
2764                 pkt_type = I40IW_PKT_TYPE_SYN;
2765                 if (tcph->ack)
2766                         pkt_type = I40IW_PKT_TYPE_SYNACK;
2767         } else if (tcph->ack) {
2768                 pkt_type = I40IW_PKT_TYPE_ACK;
2769         }
2770         if (tcph->fin)
2771                 fin_set = 1;
2772
2773         switch (pkt_type) {
2774         case I40IW_PKT_TYPE_SYN:
2775                 i40iw_handle_syn_pkt(cm_node, rbuf);
2776                 break;
2777         case I40IW_PKT_TYPE_SYNACK:
2778                 i40iw_handle_synack_pkt(cm_node, rbuf);
2779                 break;
2780         case I40IW_PKT_TYPE_ACK:
2781                 ret = i40iw_handle_ack_pkt(cm_node, rbuf);
2782                 if (fin_set && !ret)
2783                         i40iw_handle_fin_pkt(cm_node);
2784                 break;
2785         case I40IW_PKT_TYPE_RST:
2786                 i40iw_handle_rst_pkt(cm_node, rbuf);
2787                 break;
2788         default:
2789                 if (fin_set &&
2790                     (!i40iw_check_seq(cm_node, (struct tcphdr *)rbuf->tcph)))
2791                         i40iw_handle_fin_pkt(cm_node);
2792                 break;
2793         }
2794 }
2795
2796 /**
2797  * i40iw_make_listen_node - create a listen node with params
2798  * @cm_core: cm's core
2799  * @iwdev: iwarp device structure
2800  * @cm_info: quad info for connection
2801  */
2802 static struct i40iw_cm_listener *i40iw_make_listen_node(
2803                                         struct i40iw_cm_core *cm_core,
2804                                         struct i40iw_device *iwdev,
2805                                         struct i40iw_cm_info *cm_info)
2806 {
2807         struct i40iw_cm_listener *listener;
2808         unsigned long flags;
2809
2810         /* cannot have multiple matching listeners */
2811         listener = i40iw_find_listener(cm_core, cm_info->loc_addr,
2812                                        cm_info->loc_port,
2813                                        cm_info->vlan_id,
2814                                        I40IW_CM_LISTENER_EITHER_STATE);
2815         if (listener &&
2816             (listener->listener_state == I40IW_CM_LISTENER_ACTIVE_STATE)) {
2817                 atomic_dec(&listener->ref_count);
2818                 i40iw_debug(cm_core->dev,
2819                             I40IW_DEBUG_CM,
2820                             "Not creating listener since it already exists\n");
2821                 return NULL;
2822         }
2823
2824         if (!listener) {
2825                 /* create a CM listen node (1/2 node to compare incoming traffic to) */
2826                 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
2827                 if (!listener)
2828                         return NULL;
2829                 cm_core->stats_listen_nodes_created++;
2830                 memcpy(listener->loc_addr, cm_info->loc_addr, sizeof(listener->loc_addr));
2831                 listener->loc_port = cm_info->loc_port;
2832
2833                 INIT_LIST_HEAD(&listener->child_listen_list);
2834
2835                 atomic_set(&listener->ref_count, 1);
2836         } else {
2837                 listener->reused_node = 1;
2838         }
2839
2840         listener->cm_id = cm_info->cm_id;
2841         listener->ipv4 = cm_info->ipv4;
2842         listener->vlan_id = cm_info->vlan_id;
2843         atomic_set(&listener->pend_accepts_cnt, 0);
2844         listener->cm_core = cm_core;
2845         listener->iwdev = iwdev;
2846
2847         listener->backlog = cm_info->backlog;
2848         listener->listener_state = I40IW_CM_LISTENER_ACTIVE_STATE;
2849
2850         if (!listener->reused_node) {
2851                 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2852                 list_add(&listener->list, &cm_core->listen_nodes);
2853                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2854         }
2855
2856         return listener;
2857 }
2858
2859 /**
2860  * i40iw_create_cm_node - make a connection node with params
2861  * @cm_core: cm's core
2862  * @iwdev: iwarp device structure
2863  * @private_data_len: len to provate data for mpa request
2864  * @private_data: pointer to private data for connection
2865  * @cm_info: quad info for connection
2866  */
2867 static struct i40iw_cm_node *i40iw_create_cm_node(
2868                                         struct i40iw_cm_core *cm_core,
2869                                         struct i40iw_device *iwdev,
2870                                         u16 private_data_len,
2871                                         void *private_data,
2872                                         struct i40iw_cm_info *cm_info)
2873 {
2874         struct i40iw_cm_node *cm_node;
2875         struct i40iw_cm_listener *loopback_remotelistener;
2876         struct i40iw_cm_node *loopback_remotenode;
2877         struct i40iw_cm_info loopback_cm_info;
2878
2879         /* create a CM connection node */
2880         cm_node = i40iw_make_cm_node(cm_core, iwdev, cm_info, NULL);
2881         if (!cm_node)
2882                 return ERR_PTR(-ENOMEM);
2883         /* set our node side to client (active) side */
2884         cm_node->tcp_cntxt.client = 1;
2885         cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE;
2886
2887         if (!memcmp(cm_info->loc_addr, cm_info->rem_addr, sizeof(cm_info->loc_addr))) {
2888                 loopback_remotelistener = i40iw_find_listener(
2889                                                 cm_core,
2890                                                 cm_info->rem_addr,
2891                                                 cm_node->rem_port,
2892                                                 cm_node->vlan_id,
2893                                                 I40IW_CM_LISTENER_ACTIVE_STATE);
2894                 if (!loopback_remotelistener) {
2895                         i40iw_rem_ref_cm_node(cm_node);
2896                         return ERR_PTR(-ECONNREFUSED);
2897                 } else {
2898                         loopback_cm_info = *cm_info;
2899                         loopback_cm_info.loc_port = cm_info->rem_port;
2900                         loopback_cm_info.rem_port = cm_info->loc_port;
2901                         loopback_cm_info.cm_id = loopback_remotelistener->cm_id;
2902                         loopback_cm_info.ipv4 = cm_info->ipv4;
2903                         loopback_remotenode = i40iw_make_cm_node(cm_core,
2904                                                                  iwdev,
2905                                                                  &loopback_cm_info,
2906                                                                  loopback_remotelistener);
2907                         if (!loopback_remotenode) {
2908                                 i40iw_rem_ref_cm_node(cm_node);
2909                                 return ERR_PTR(-ENOMEM);
2910                         }
2911                         cm_core->stats_loopbacks++;
2912                         loopback_remotenode->loopbackpartner = cm_node;
2913                         loopback_remotenode->tcp_cntxt.rcv_wscale =
2914                                 I40IW_CM_DEFAULT_RCV_WND_SCALE;
2915                         cm_node->loopbackpartner = loopback_remotenode;
2916                         memcpy(loopback_remotenode->pdata_buf, private_data,
2917                                private_data_len);
2918                         loopback_remotenode->pdata.size = private_data_len;
2919
2920                         cm_node->state = I40IW_CM_STATE_OFFLOADED;
2921                         cm_node->tcp_cntxt.rcv_nxt =
2922                                 loopback_remotenode->tcp_cntxt.loc_seq_num;
2923                         loopback_remotenode->tcp_cntxt.rcv_nxt =
2924                                 cm_node->tcp_cntxt.loc_seq_num;
2925                         cm_node->tcp_cntxt.max_snd_wnd =
2926                                 loopback_remotenode->tcp_cntxt.rcv_wnd;
2927                         loopback_remotenode->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
2928                         cm_node->tcp_cntxt.snd_wnd = loopback_remotenode->tcp_cntxt.rcv_wnd;
2929                         loopback_remotenode->tcp_cntxt.snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
2930                         cm_node->tcp_cntxt.snd_wscale = loopback_remotenode->tcp_cntxt.rcv_wscale;
2931                         loopback_remotenode->tcp_cntxt.snd_wscale = cm_node->tcp_cntxt.rcv_wscale;
2932                         loopback_remotenode->state = I40IW_CM_STATE_MPAREQ_RCVD;
2933                         i40iw_create_event(loopback_remotenode, I40IW_CM_EVENT_MPA_REQ);
2934                 }
2935                 return cm_node;
2936         }
2937
2938         cm_node->pdata.size = private_data_len;
2939         cm_node->pdata.addr = cm_node->pdata_buf;
2940
2941         memcpy(cm_node->pdata_buf, private_data, private_data_len);
2942
2943         cm_node->state = I40IW_CM_STATE_SYN_SENT;
2944         return cm_node;
2945 }
2946
2947 /**
2948  * i40iw_cm_reject - reject and teardown a connection
2949  * @cm_node: connection's node
2950  * @pdate: ptr to private data for reject
2951  * @plen: size of private data
2952  */
2953 static int i40iw_cm_reject(struct i40iw_cm_node *cm_node, const void *pdata, u8 plen)
2954 {
2955         int ret = 0;
2956         int err;
2957         int passive_state;
2958         struct iw_cm_id *cm_id = cm_node->cm_id;
2959         struct i40iw_cm_node *loopback = cm_node->loopbackpartner;
2960
2961         if (cm_node->tcp_cntxt.client)
2962                 return ret;
2963         i40iw_cleanup_retrans_entry(cm_node);
2964
2965         if (!loopback) {
2966                 passive_state = atomic_add_return(1, &cm_node->passive_state);
2967                 if (passive_state == I40IW_SEND_RESET_EVENT) {
2968                         cm_node->state = I40IW_CM_STATE_CLOSED;
2969                         i40iw_rem_ref_cm_node(cm_node);
2970                 } else {
2971                         if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
2972                                 i40iw_rem_ref_cm_node(cm_node);
2973                         } else {
2974                                 ret = i40iw_send_mpa_reject(cm_node, pdata, plen);
2975                                 if (ret) {
2976                                         cm_node->state = I40IW_CM_STATE_CLOSED;
2977                                         err = i40iw_send_reset(cm_node);
2978                                         if (err)
2979                                                 i40iw_pr_err("send reset failed\n");
2980                                 } else {
2981                                         cm_id->add_ref(cm_id);
2982                                 }
2983                         }
2984                 }
2985         } else {
2986                 cm_node->cm_id = NULL;
2987                 if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
2988                         i40iw_rem_ref_cm_node(cm_node);
2989                         i40iw_rem_ref_cm_node(loopback);
2990                 } else {
2991                         ret = i40iw_send_cm_event(loopback,
2992                                                   loopback->cm_id,
2993                                                   IW_CM_EVENT_CONNECT_REPLY,
2994                                                   -ECONNREFUSED);
2995                         i40iw_rem_ref_cm_node(cm_node);
2996                         loopback->state = I40IW_CM_STATE_CLOSING;
2997
2998                         cm_id = loopback->cm_id;
2999                         i40iw_rem_ref_cm_node(loopback);
3000                         cm_id->rem_ref(cm_id);
3001                 }
3002         }
3003
3004         return ret;
3005 }
3006
3007 /**
3008  * i40iw_cm_close - close of cm connection
3009  * @cm_node: connection's node
3010  */
3011 static int i40iw_cm_close(struct i40iw_cm_node *cm_node)
3012 {
3013         int ret = 0;
3014
3015         if (!cm_node)
3016                 return -EINVAL;
3017
3018         switch (cm_node->state) {
3019         case I40IW_CM_STATE_SYN_RCVD:
3020         case I40IW_CM_STATE_SYN_SENT:
3021         case I40IW_CM_STATE_ONE_SIDE_ESTABLISHED:
3022         case I40IW_CM_STATE_ESTABLISHED:
3023         case I40IW_CM_STATE_ACCEPTING:
3024         case I40IW_CM_STATE_MPAREQ_SENT:
3025         case I40IW_CM_STATE_MPAREQ_RCVD:
3026                 i40iw_cleanup_retrans_entry(cm_node);
3027                 i40iw_send_reset(cm_node);
3028                 break;
3029         case I40IW_CM_STATE_CLOSE_WAIT:
3030                 cm_node->state = I40IW_CM_STATE_LAST_ACK;
3031                 i40iw_send_fin(cm_node);
3032                 break;
3033         case I40IW_CM_STATE_FIN_WAIT1:
3034         case I40IW_CM_STATE_FIN_WAIT2:
3035         case I40IW_CM_STATE_LAST_ACK:
3036         case I40IW_CM_STATE_TIME_WAIT:
3037         case I40IW_CM_STATE_CLOSING:
3038                 ret = -1;
3039                 break;
3040         case I40IW_CM_STATE_LISTENING:
3041                 i40iw_cleanup_retrans_entry(cm_node);
3042                 i40iw_send_reset(cm_node);
3043                 break;
3044         case I40IW_CM_STATE_MPAREJ_RCVD:
3045         case I40IW_CM_STATE_UNKNOWN:
3046         case I40IW_CM_STATE_INITED:
3047         case I40IW_CM_STATE_CLOSED:
3048         case I40IW_CM_STATE_LISTENER_DESTROYED:
3049                 i40iw_rem_ref_cm_node(cm_node);
3050                 break;
3051         case I40IW_CM_STATE_OFFLOADED:
3052                 if (cm_node->send_entry)
3053                         i40iw_pr_err("send_entry\n");
3054                 i40iw_rem_ref_cm_node(cm_node);
3055                 break;
3056         }
3057         return ret;
3058 }
3059
3060 /**
3061  * i40iw_receive_ilq - recv an ETHERNET packet, and process it
3062  * through CM
3063  * @vsi: pointer to the vsi structure
3064  * @rbuf: receive buffer
3065  */
3066 void i40iw_receive_ilq(struct i40iw_sc_vsi *vsi, struct i40iw_puda_buf *rbuf)
3067 {
3068         struct i40iw_cm_node *cm_node;
3069         struct i40iw_cm_listener *listener;
3070         struct iphdr *iph;
3071         struct ipv6hdr *ip6h;
3072         struct tcphdr *tcph;
3073         struct i40iw_cm_info cm_info;
3074         struct i40iw_sc_dev *dev = vsi->dev;
3075         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
3076         struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3077         struct vlan_ethhdr *ethh;
3078         u16 vtag;
3079
3080         /* if vlan, then maclen = 18 else 14 */
3081         iph = (struct iphdr *)rbuf->iph;
3082         memset(&cm_info, 0, sizeof(cm_info));
3083
3084         i40iw_debug_buf(dev,
3085                         I40IW_DEBUG_ILQ,
3086                         "RECEIVE ILQ BUFFER",
3087                         rbuf->mem.va,
3088                         rbuf->totallen);
3089         ethh = (struct vlan_ethhdr *)rbuf->mem.va;
3090
3091         if (ethh->h_vlan_proto == htons(ETH_P_8021Q)) {
3092                 vtag = ntohs(ethh->h_vlan_TCI);
3093                 cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
3094                 cm_info.vlan_id = vtag & VLAN_VID_MASK;
3095                 i40iw_debug(cm_core->dev,
3096                             I40IW_DEBUG_CM,
3097                             "%s vlan_id=%d\n",
3098                             __func__,
3099                             cm_info.vlan_id);
3100         } else {
3101                 cm_info.vlan_id = I40IW_NO_VLAN;
3102         }
3103         tcph = (struct tcphdr *)rbuf->tcph;
3104
3105         if (rbuf->ipv4) {
3106                 cm_info.loc_addr[0] = ntohl(iph->daddr);
3107                 cm_info.rem_addr[0] = ntohl(iph->saddr);
3108                 cm_info.ipv4 = true;
3109                 cm_info.tos = iph->tos;
3110         } else {
3111                 ip6h = (struct ipv6hdr *)rbuf->iph;
3112                 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3113                                     ip6h->daddr.in6_u.u6_addr32);
3114                 i40iw_copy_ip_ntohl(cm_info.rem_addr,
3115                                     ip6h->saddr.in6_u.u6_addr32);
3116                 cm_info.ipv4 = false;
3117                 cm_info.tos = (ip6h->priority << 4) | (ip6h->flow_lbl[0] >> 4);
3118         }
3119         cm_info.loc_port = ntohs(tcph->dest);
3120         cm_info.rem_port = ntohs(tcph->source);
3121         cm_node = i40iw_find_node(cm_core,
3122                                   cm_info.rem_port,
3123                                   cm_info.rem_addr,
3124                                   cm_info.loc_port,
3125                                   cm_info.loc_addr,
3126                                   true);
3127
3128         if (!cm_node) {
3129                 /* Only type of packet accepted are for */
3130                 /* the PASSIVE open (syn only) */
3131                 if (!tcph->syn || tcph->ack)
3132                         return;
3133                 listener =
3134                     i40iw_find_listener(cm_core,
3135                                         cm_info.loc_addr,
3136                                         cm_info.loc_port,
3137                                         cm_info.vlan_id,
3138                                         I40IW_CM_LISTENER_ACTIVE_STATE);
3139                 if (!listener) {
3140                         cm_info.cm_id = NULL;
3141                         i40iw_debug(cm_core->dev,
3142                                     I40IW_DEBUG_CM,
3143                                     "%s no listener found\n",
3144                                     __func__);
3145                         return;
3146                 }
3147                 cm_info.cm_id = listener->cm_id;
3148                 cm_node = i40iw_make_cm_node(cm_core, iwdev, &cm_info, listener);
3149                 if (!cm_node) {
3150                         i40iw_debug(cm_core->dev,
3151                                     I40IW_DEBUG_CM,
3152                                     "%s allocate node failed\n",
3153                                     __func__);
3154                         atomic_dec(&listener->ref_count);
3155                         return;
3156                 }
3157                 if (!tcph->rst && !tcph->fin) {
3158                         cm_node->state = I40IW_CM_STATE_LISTENING;
3159                 } else {
3160                         i40iw_rem_ref_cm_node(cm_node);
3161                         return;
3162                 }
3163                 atomic_inc(&cm_node->ref_count);
3164         } else if (cm_node->state == I40IW_CM_STATE_OFFLOADED) {
3165                 i40iw_rem_ref_cm_node(cm_node);
3166                 return;
3167         }
3168         i40iw_process_packet(cm_node, rbuf);
3169         i40iw_rem_ref_cm_node(cm_node);
3170 }
3171
3172 /**
3173  * i40iw_setup_cm_core - allocate a top level instance of a cm
3174  * core
3175  * @iwdev: iwarp device structure
3176  */
3177 void i40iw_setup_cm_core(struct i40iw_device *iwdev)
3178 {
3179         struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3180
3181         cm_core->iwdev = iwdev;
3182         cm_core->dev = &iwdev->sc_dev;
3183
3184         INIT_LIST_HEAD(&cm_core->connected_nodes);
3185         INIT_LIST_HEAD(&cm_core->listen_nodes);
3186
3187         setup_timer(&cm_core->tcp_timer, i40iw_cm_timer_tick,
3188                     (unsigned long)cm_core);
3189
3190         spin_lock_init(&cm_core->ht_lock);
3191         spin_lock_init(&cm_core->listen_list_lock);
3192
3193         cm_core->event_wq = alloc_ordered_workqueue("iwewq",
3194                                                     WQ_MEM_RECLAIM);
3195
3196         cm_core->disconn_wq = alloc_ordered_workqueue("iwdwq",
3197                                                       WQ_MEM_RECLAIM);
3198 }
3199
3200 /**
3201  * i40iw_cleanup_cm_core - deallocate a top level instance of a
3202  * cm core
3203  * @cm_core: cm's core
3204  */
3205 void i40iw_cleanup_cm_core(struct i40iw_cm_core *cm_core)
3206 {
3207         unsigned long flags;
3208
3209         if (!cm_core)
3210                 return;
3211
3212         spin_lock_irqsave(&cm_core->ht_lock, flags);
3213         if (timer_pending(&cm_core->tcp_timer))
3214                 del_timer_sync(&cm_core->tcp_timer);
3215         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
3216
3217         destroy_workqueue(cm_core->event_wq);
3218         destroy_workqueue(cm_core->disconn_wq);
3219 }
3220
3221 /**
3222  * i40iw_init_tcp_ctx - setup qp context
3223  * @cm_node: connection's node
3224  * @tcp_info: offload info for tcp
3225  * @iwqp: associate qp for the connection
3226  */
3227 static void i40iw_init_tcp_ctx(struct i40iw_cm_node *cm_node,
3228                                struct i40iw_tcp_offload_info *tcp_info,
3229                                struct i40iw_qp *iwqp)
3230 {
3231         tcp_info->ipv4 = cm_node->ipv4;
3232         tcp_info->drop_ooo_seg = true;
3233         tcp_info->wscale = true;
3234         tcp_info->ignore_tcp_opt = true;
3235         tcp_info->ignore_tcp_uns_opt = true;
3236         tcp_info->no_nagle = false;
3237
3238         tcp_info->ttl = I40IW_DEFAULT_TTL;
3239         tcp_info->rtt_var = cpu_to_le32(I40IW_DEFAULT_RTT_VAR);
3240         tcp_info->ss_thresh = cpu_to_le32(I40IW_DEFAULT_SS_THRESH);
3241         tcp_info->rexmit_thresh = I40IW_DEFAULT_REXMIT_THRESH;
3242
3243         tcp_info->tcp_state = I40IW_TCP_STATE_ESTABLISHED;
3244         tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale;
3245         tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale;
3246
3247         tcp_info->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3248         tcp_info->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
3249         tcp_info->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
3250         tcp_info->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3251
3252         tcp_info->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3253         tcp_info->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss);
3254         tcp_info->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
3255         tcp_info->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3256         tcp_info->max_snd_window = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
3257         tcp_info->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
3258                                         cm_node->tcp_cntxt.rcv_wscale);
3259
3260         tcp_info->flow_label = 0;
3261         tcp_info->snd_mss = cpu_to_le32(((u32)cm_node->tcp_cntxt.mss));
3262         if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
3263                 tcp_info->insert_vlan_tag = true;
3264                 tcp_info->vlan_tag = cpu_to_le16(cm_node->vlan_id);
3265         }
3266         if (cm_node->ipv4) {
3267                 tcp_info->src_port = cpu_to_le16(cm_node->loc_port);
3268                 tcp_info->dst_port = cpu_to_le16(cm_node->rem_port);
3269
3270                 tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[0]);
3271                 tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[0]);
3272                 tcp_info->arp_idx =
3273                         cpu_to_le16((u16)i40iw_arp_table(
3274                                                          iwqp->iwdev,
3275                                                          &tcp_info->dest_ip_addr3,
3276                                                          true,
3277                                                          NULL,
3278                                                          I40IW_ARP_RESOLVE));
3279         } else {
3280                 tcp_info->src_port = cpu_to_le16(cm_node->loc_port);
3281                 tcp_info->dst_port = cpu_to_le16(cm_node->rem_port);
3282                 tcp_info->dest_ip_addr0 = cpu_to_le32(cm_node->rem_addr[0]);
3283                 tcp_info->dest_ip_addr1 = cpu_to_le32(cm_node->rem_addr[1]);
3284                 tcp_info->dest_ip_addr2 = cpu_to_le32(cm_node->rem_addr[2]);
3285                 tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[3]);
3286                 tcp_info->local_ipaddr0 = cpu_to_le32(cm_node->loc_addr[0]);
3287                 tcp_info->local_ipaddr1 = cpu_to_le32(cm_node->loc_addr[1]);
3288                 tcp_info->local_ipaddr2 = cpu_to_le32(cm_node->loc_addr[2]);
3289                 tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[3]);
3290                 tcp_info->arp_idx =
3291                         cpu_to_le16((u16)i40iw_arp_table(
3292                                                          iwqp->iwdev,
3293                                                          &tcp_info->dest_ip_addr0,
3294                                                          false,
3295                                                          NULL,
3296                                                          I40IW_ARP_RESOLVE));
3297         }
3298 }
3299
3300 /**
3301  * i40iw_cm_init_tsa_conn - setup qp for RTS
3302  * @iwqp: associate qp for the connection
3303  * @cm_node: connection's node
3304  */
3305 static void i40iw_cm_init_tsa_conn(struct i40iw_qp *iwqp,
3306                                    struct i40iw_cm_node *cm_node)
3307 {
3308         struct i40iw_tcp_offload_info tcp_info;
3309         struct i40iwarp_offload_info *iwarp_info;
3310         struct i40iw_qp_host_ctx_info *ctx_info;
3311         struct i40iw_device *iwdev = iwqp->iwdev;
3312         struct i40iw_sc_dev *dev = &iwqp->iwdev->sc_dev;
3313
3314         memset(&tcp_info, 0x00, sizeof(struct i40iw_tcp_offload_info));
3315         iwarp_info = &iwqp->iwarp_info;
3316         ctx_info = &iwqp->ctx_info;
3317
3318         ctx_info->tcp_info = &tcp_info;
3319         ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id;
3320         ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id;
3321
3322         iwarp_info->ord_size = cm_node->ord_size;
3323         iwarp_info->ird_size = i40iw_derive_hw_ird_setting(cm_node->ird_size);
3324
3325         if (iwarp_info->ord_size == 1)
3326                 iwarp_info->ord_size = 2;
3327
3328         iwarp_info->rd_enable = true;
3329         iwarp_info->rdmap_ver = 1;
3330         iwarp_info->ddp_ver = 1;
3331
3332         iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id;
3333
3334         ctx_info->tcp_info_valid = true;
3335         ctx_info->iwarp_info_valid = true;
3336         ctx_info->add_to_qoslist = true;
3337         ctx_info->user_pri = cm_node->user_pri;
3338
3339         i40iw_init_tcp_ctx(cm_node, &tcp_info, iwqp);
3340         if (cm_node->snd_mark_en) {
3341                 iwarp_info->snd_mark_en = true;
3342                 iwarp_info->snd_mark_offset = (tcp_info.snd_nxt &
3343                                 SNDMARKER_SEQNMASK) + cm_node->lsmm_size;
3344         }
3345
3346         cm_node->state = I40IW_CM_STATE_OFFLOADED;
3347         tcp_info.tcp_state = I40IW_TCP_STATE_ESTABLISHED;
3348         tcp_info.src_mac_addr_idx = iwdev->mac_ip_table_idx;
3349         tcp_info.tos = cm_node->tos;
3350
3351         dev->iw_priv_qp_ops->qp_setctx(&iwqp->sc_qp, (u64 *)(iwqp->host_ctx.va), ctx_info);
3352
3353         /* once tcp_info is set, no need to do it again */
3354         ctx_info->tcp_info_valid = false;
3355         ctx_info->iwarp_info_valid = false;
3356         ctx_info->add_to_qoslist = false;
3357 }
3358
3359 /**
3360  * i40iw_cm_disconn - when a connection is being closed
3361  * @iwqp: associate qp for the connection
3362  */
3363 void i40iw_cm_disconn(struct i40iw_qp *iwqp)
3364 {
3365         struct disconn_work *work;
3366         struct i40iw_device *iwdev = iwqp->iwdev;
3367         struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3368         unsigned long flags;
3369
3370         work = kzalloc(sizeof(*work), GFP_ATOMIC);
3371         if (!work)
3372                 return; /* Timer will clean up */
3373
3374         spin_lock_irqsave(&iwdev->qptable_lock, flags);
3375         if (!iwdev->qp_table[iwqp->ibqp.qp_num]) {
3376                 spin_unlock_irqrestore(&iwdev->qptable_lock, flags);
3377                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM,
3378                             "%s qp_id %d is already freed\n",
3379                              __func__, iwqp->ibqp.qp_num);
3380                 kfree(work);
3381                 return;
3382         }
3383         i40iw_add_ref(&iwqp->ibqp);
3384         spin_unlock_irqrestore(&iwdev->qptable_lock, flags);
3385
3386         work->iwqp = iwqp;
3387         INIT_WORK(&work->work, i40iw_disconnect_worker);
3388         queue_work(cm_core->disconn_wq, &work->work);
3389         return;
3390 }
3391
3392 /**
3393  * i40iw_qp_disconnect - free qp and close cm
3394  * @iwqp: associate qp for the connection
3395  */
3396 static void i40iw_qp_disconnect(struct i40iw_qp *iwqp)
3397 {
3398         struct i40iw_device *iwdev;
3399         struct i40iw_ib_device *iwibdev;
3400
3401         iwdev = to_iwdev(iwqp->ibqp.device);
3402         if (!iwdev) {
3403                 i40iw_pr_err("iwdev == NULL\n");
3404                 return;
3405         }
3406
3407         iwibdev = iwdev->iwibdev;
3408
3409         if (iwqp->active_conn) {
3410                 /* indicate this connection is NOT active */
3411                 iwqp->active_conn = 0;
3412         } else {
3413                 /* Need to free the Last Streaming Mode Message */
3414                 if (iwqp->ietf_mem.va) {
3415                         if (iwqp->lsmm_mr)
3416                                 iwibdev->ibdev.dereg_mr(iwqp->lsmm_mr);
3417                         i40iw_free_dma_mem(iwdev->sc_dev.hw, &iwqp->ietf_mem);
3418                 }
3419         }
3420
3421         /* close the CM node down if it is still active */
3422         if (iwqp->cm_node) {
3423                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "%s Call close API\n", __func__);
3424                 i40iw_cm_close(iwqp->cm_node);
3425         }
3426 }
3427
3428 /**
3429  * i40iw_cm_disconn_true - called by worker thread to disconnect qp
3430  * @iwqp: associate qp for the connection
3431  */
3432 static void i40iw_cm_disconn_true(struct i40iw_qp *iwqp)
3433 {
3434         struct iw_cm_id *cm_id;
3435         struct i40iw_device *iwdev;
3436         struct i40iw_sc_qp *qp = &iwqp->sc_qp;
3437         u16 last_ae;
3438         u8 original_hw_tcp_state;
3439         u8 original_ibqp_state;
3440         int disconn_status = 0;
3441         int issue_disconn = 0;
3442         int issue_close = 0;
3443         int issue_flush = 0;
3444         struct ib_event ibevent;
3445         unsigned long flags;
3446         int ret;
3447
3448         if (!iwqp) {
3449                 i40iw_pr_err("iwqp == NULL\n");
3450                 return;
3451         }
3452
3453         spin_lock_irqsave(&iwqp->lock, flags);
3454         cm_id = iwqp->cm_id;
3455         /* make sure we havent already closed this connection */
3456         if (!cm_id) {
3457                 spin_unlock_irqrestore(&iwqp->lock, flags);
3458                 return;
3459         }
3460
3461         iwdev = to_iwdev(iwqp->ibqp.device);
3462
3463         original_hw_tcp_state = iwqp->hw_tcp_state;
3464         original_ibqp_state = iwqp->ibqp_state;
3465         last_ae = iwqp->last_aeq;
3466
3467         if (qp->term_flags) {
3468                 issue_disconn = 1;
3469                 issue_close = 1;
3470                 iwqp->cm_id = NULL;
3471                 /*When term timer expires after cm_timer, don't want
3472                  *terminate-handler to issue cm_disconn which can re-free
3473                  *a QP even after its refcnt=0.
3474                  */
3475                 i40iw_terminate_del_timer(qp);
3476                 if (!iwqp->flush_issued) {
3477                         iwqp->flush_issued = 1;
3478                         issue_flush = 1;
3479                 }
3480         } else if ((original_hw_tcp_state == I40IW_TCP_STATE_CLOSE_WAIT) ||
3481                    ((original_ibqp_state == IB_QPS_RTS) &&
3482                     (last_ae == I40IW_AE_LLP_CONNECTION_RESET))) {
3483                 issue_disconn = 1;
3484                 if (last_ae == I40IW_AE_LLP_CONNECTION_RESET)
3485                         disconn_status = -ECONNRESET;
3486         }
3487
3488         if (((original_hw_tcp_state == I40IW_TCP_STATE_CLOSED) ||
3489              (original_hw_tcp_state == I40IW_TCP_STATE_TIME_WAIT) ||
3490              (last_ae == I40IW_AE_RDMAP_ROE_BAD_LLP_CLOSE) ||
3491              (last_ae == I40IW_AE_LLP_CONNECTION_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                 i40iw_rem_ref_cm_node(cm_node);
4270         }
4271 }
4272
4273 /**
4274  * i40iw_ifdown_notify - process an ifdown on an interface
4275  * @iwdev: device pointer
4276  * @ipaddr: Pointer to IPv4 or IPv6 address
4277  * @ipv4: flag indicating IPv4 when true
4278  * @ifup: flag indicating interface up when true
4279  */
4280 void i40iw_if_notify(struct i40iw_device *iwdev, struct net_device *netdev,
4281                      u32 *ipaddr, bool ipv4, bool ifup)
4282 {
4283         struct i40iw_cm_core *cm_core = &iwdev->cm_core;
4284         unsigned long flags;
4285         struct i40iw_cm_listener *listen_node;
4286         static const u32 ip_zero[4] = { 0, 0, 0, 0 };
4287         struct i40iw_cm_info nfo;
4288         u16 vlan_id = rdma_vlan_dev_vlan_id(netdev);
4289         enum i40iw_status_code ret;
4290         enum i40iw_quad_hash_manage_type op =
4291                 ifup ? I40IW_QHASH_MANAGE_TYPE_ADD : I40IW_QHASH_MANAGE_TYPE_DELETE;
4292
4293         /* Disable or enable qhash for listeners */
4294         spin_lock_irqsave(&cm_core->listen_list_lock, flags);
4295         list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
4296                 if (vlan_id == listen_node->vlan_id &&
4297                     (!memcmp(listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16) ||
4298                     !memcmp(listen_node->loc_addr, ip_zero, ipv4 ? 4 : 16))) {
4299                         memcpy(nfo.loc_addr, listen_node->loc_addr,
4300                                sizeof(nfo.loc_addr));
4301                         nfo.loc_port = listen_node->loc_port;
4302                         nfo.ipv4 = listen_node->ipv4;
4303                         nfo.vlan_id = listen_node->vlan_id;
4304                         nfo.user_pri = listen_node->user_pri;
4305                         if (!list_empty(&listen_node->child_listen_list)) {
4306                                 i40iw_qhash_ctrl(iwdev,
4307                                                  listen_node,
4308                                                  &nfo,
4309                                                  ipaddr, ipv4, ifup);
4310                         } else if (memcmp(listen_node->loc_addr, ip_zero,
4311                                           ipv4 ? 4 : 16)) {
4312                                 ret = i40iw_manage_qhash(iwdev,
4313                                                          &nfo,
4314                                                          I40IW_QHASH_TYPE_TCP_SYN,
4315                                                          op,
4316                                                          NULL,
4317                                                          false);
4318                                 if (!ret)
4319                                         listen_node->qhash_set = ifup;
4320                         }
4321                 }
4322         }
4323         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
4324
4325         /* disconnect any connected qp's on ifdown */
4326         if (!ifup)
4327                 i40iw_cm_disconnect_all(iwdev);
4328 }