drivers/infiniband/hw/i40iw/i40iw_cm.c

   1 /*******************************************************************************
   2 *
   3 * Copyright (c) 2015-2016 Intel Corporation.  All rights reserved.
   4 *
   5 * This software is available to you under a choice of one of two
   6 * licenses.  You may choose to be licensed under the terms of the GNU
   7 * General Public License (GPL) Version 2, available from the file
   8 * COPYING in the main directory of this source tree, or the
   9 * OpenFabrics.org BSD license below:
  10 *
  11 *   Redistribution and use in source and binary forms, with or
  12 *   without modification, are permitted provided that the following
  13 *   conditions are met:
  14 *
  15 *    - Redistributions of source code must retain the above
  16 *       copyright notice, this list of conditions and the following
  17 *       disclaimer.
  18 *
  19 *    - Redistributions in binary form must reproduce the above
  20 *       copyright notice, this list of conditions and the following
  21 *       disclaimer in the documentation and/or other materials
  22 *       provided with the distribution.
  23 *
  24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  31 * SOFTWARE.
  32 *
  33 *******************************************************************************/
  34
  35 #include <linux/atomic.h>
  36 #include <linux/ip.h>
  37 #include <linux/tcp.h>
  38 #include <linux/init.h>
  39 #include <linux/if_arp.h>
  40 #include <linux/if_vlan.h>
  41 #include <linux/notifier.h>
  42 #include <linux/net.h>
  43 #include <linux/types.h>
  44 #include <linux/timer.h>
  45 #include <linux/time.h>
  46 #include <linux/delay.h>
  47 #include <linux/etherdevice.h>
  48 #include <linux/netdevice.h>
  49 #include <linux/random.h>
  50 #include <linux/list.h>
  51 #include <linux/threads.h>
  52 #include <linux/highmem.h>
  53 #include <net/arp.h>
  54 #include <net/ndisc.h>
  55 #include <net/neighbour.h>
  56 #include <net/route.h>
  57 #include <net/addrconf.h>
  58 #include <net/ip6_route.h>
  59 #include <net/ip_fib.h>
  60 #include <net/tcp.h>
  61 #include <asm/checksum.h>
  62
  63 #include "i40iw.h"
  64
  65 static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *);
  66 static void i40iw_cm_post_event(struct i40iw_cm_event *event);
  67 static void i40iw_disconnect_worker(struct work_struct *work);
  68
  69 /**
  70  * i40iw_free_sqbuf - put back puda buffer if refcount = 0
  71  * @vsi: pointer to vsi structure
  72  * @buf: puda buffer to free
  73  */
  74 void i40iw_free_sqbuf(struct i40iw_sc_vsi *vsi, void *bufp)
  75 {
  76         struct i40iw_puda_buf *buf = (struct i40iw_puda_buf *)bufp;
  77         struct i40iw_puda_rsrc *ilq = vsi->ilq;
  78
  79         if (!atomic_dec_return(&buf->refcount))
  80                 i40iw_puda_ret_bufpool(ilq, buf);
  81 }
  82
  83 /**
  84  * i40iw_derive_hw_ird_setting - Calculate IRD
  85  *
  86  * @cm_ird: IRD of connection's node
  87  *
  88  * The ird from the connection is rounded to a supported HW
  89  * setting (2,8,32,64) and then encoded for ird_size field of
  90  * qp_ctx
  91  */
  92 static u8 i40iw_derive_hw_ird_setting(u16 cm_ird)
  93 {
  94         u8 encoded_ird_size;
  95         u8 pof2_cm_ird = 1;
  96
  97         /* round-off to next powerof2 */
  98         while (pof2_cm_ird < cm_ird)
  99                 pof2_cm_ird *= 2;
 100
 101         /* ird_size field is encoded in qp_ctx */
 102         switch (pof2_cm_ird) {
 103         case I40IW_HW_IRD_SETTING_64:
 104                 encoded_ird_size = 3;
 105                 break;
 106         case I40IW_HW_IRD_SETTING_32:
 107         case I40IW_HW_IRD_SETTING_16:
 108                 encoded_ird_size = 2;
 109                 break;
 110         case I40IW_HW_IRD_SETTING_8:
 111         case I40IW_HW_IRD_SETTING_4:
 112                 encoded_ird_size = 1;
 113                 break;
 114         case I40IW_HW_IRD_SETTING_2:
 115         default:
 116                 encoded_ird_size = 0;
 117                 break;
 118         }
 119         return encoded_ird_size;
 120 }
 121
 122 /**
 123  * i40iw_record_ird_ord - Record IRD/ORD passed in
 124  * @cm_node: connection's node
 125  * @conn_ird: connection IRD
 126  * @conn_ord: connection ORD
 127  */
 128 static void i40iw_record_ird_ord(struct i40iw_cm_node *cm_node, u16 conn_ird, u16 conn_ord)
 129 {
 130         if (conn_ird > I40IW_MAX_IRD_SIZE)
 131                 conn_ird = I40IW_MAX_IRD_SIZE;
 132
 133         if (conn_ord > I40IW_MAX_ORD_SIZE)
 134                 conn_ord = I40IW_MAX_ORD_SIZE;
 135
 136         cm_node->ird_size = conn_ird;
 137         cm_node->ord_size = conn_ord;
 138 }
 139
 140 /**
 141  * i40iw_copy_ip_ntohl - change network to host ip
 142  * @dst: host ip
 143  * @src: big endian
 144  */
 145 void i40iw_copy_ip_ntohl(u32 *dst, __be32 *src)
 146 {
 147         *dst++ = ntohl(*src++);
 148         *dst++ = ntohl(*src++);
 149         *dst++ = ntohl(*src++);
 150         *dst = ntohl(*src);
 151 }
 152
 153 /**
 154  * i40iw_copy_ip_htonl - change host addr to network ip
 155  * @dst: host ip
 156  * @src: little endian
 157  */
 158 static inline void i40iw_copy_ip_htonl(__be32 *dst, u32 *src)
 159 {
 160         *dst++ = htonl(*src++);
 161         *dst++ = htonl(*src++);
 162         *dst++ = htonl(*src++);
 163         *dst = htonl(*src);
 164 }
 165
 166 /**
 167  * i40iw_fill_sockaddr4 - get addr info for passive connection
 168  * @cm_node: connection's node
 169  * @event: upper layer's cm event
 170  */
 171 static inline void i40iw_fill_sockaddr4(struct i40iw_cm_node *cm_node,
 172                                         struct iw_cm_event *event)
 173 {
 174         struct sockaddr_in *laddr = (struct sockaddr_in *)&event->local_addr;
 175         struct sockaddr_in *raddr = (struct sockaddr_in *)&event->remote_addr;
 176
 177         laddr->sin_family = AF_INET;
 178         raddr->sin_family = AF_INET;
 179
 180         laddr->sin_port = htons(cm_node->loc_port);
 181         raddr->sin_port = htons(cm_node->rem_port);
 182
 183         laddr->sin_addr.s_addr = htonl(cm_node->loc_addr[0]);
 184         raddr->sin_addr.s_addr = htonl(cm_node->rem_addr[0]);
 185 }
 186
 187 /**
 188  * i40iw_fill_sockaddr6 - get ipv6 addr info for passive side
 189  * @cm_node: connection's node
 190  * @event: upper layer's cm event
 191  */
 192 static inline void i40iw_fill_sockaddr6(struct i40iw_cm_node *cm_node,
 193                                         struct iw_cm_event *event)
 194 {
 195         struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)&event->local_addr;
 196         struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)&event->remote_addr;
 197
 198         laddr6->sin6_family = AF_INET6;
 199         raddr6->sin6_family = AF_INET6;
 200
 201         laddr6->sin6_port = htons(cm_node->loc_port);
 202         raddr6->sin6_port = htons(cm_node->rem_port);
 203
 204         i40iw_copy_ip_htonl(laddr6->sin6_addr.in6_u.u6_addr32,
 205                             cm_node->loc_addr);
 206         i40iw_copy_ip_htonl(raddr6->sin6_addr.in6_u.u6_addr32,
 207                             cm_node->rem_addr);
 208 }
 209
 210 /**
 211  * i40iw_get_addr_info
 212  * @cm_node: contains ip/tcp info
 213  * @cm_info: to get a copy of the cm_node ip/tcp info
 214 */
 215 static void i40iw_get_addr_info(struct i40iw_cm_node *cm_node,
 216                                 struct i40iw_cm_info *cm_info)
 217 {
 218         cm_info->ipv4 = cm_node->ipv4;
 219         cm_info->vlan_id = cm_node->vlan_id;
 220         memcpy(cm_info->loc_addr, cm_node->loc_addr, sizeof(cm_info->loc_addr));
 221         memcpy(cm_info->rem_addr, cm_node->rem_addr, sizeof(cm_info->rem_addr));
 222         cm_info->loc_port = cm_node->loc_port;
 223         cm_info->rem_port = cm_node->rem_port;
 224         cm_info->user_pri = cm_node->user_pri;
 225 }
 226
 227 /**
 228  * i40iw_get_cmevent_info - for cm event upcall
 229  * @cm_node: connection's node
 230  * @cm_id: upper layers cm struct for the event
 231  * @event: upper layer's cm event
 232  */
 233 static inline void i40iw_get_cmevent_info(struct i40iw_cm_node *cm_node,
 234                                           struct iw_cm_id *cm_id,
 235                                           struct iw_cm_event *event)
 236 {
 237         memcpy(&event->local_addr, &cm_id->m_local_addr,
 238                sizeof(event->local_addr));
 239         memcpy(&event->remote_addr, &cm_id->m_remote_addr,
 240                sizeof(event->remote_addr));
 241         if (cm_node) {
 242                 event->private_data = (void *)cm_node->pdata_buf;
 243                 event->private_data_len = (u8)cm_node->pdata.size;
 244                 event->ird = cm_node->ird_size;
 245                 event->ord = cm_node->ord_size;
 246         }
 247 }
 248
 249 /**
 250  * i40iw_send_cm_event - upcall cm's event handler
 251  * @cm_node: connection's node
 252  * @cm_id: upper layer's cm info struct
 253  * @type: Event type to indicate
 254  * @status: status for the event type
 255  */
 256 static int i40iw_send_cm_event(struct i40iw_cm_node *cm_node,
 257                                struct iw_cm_id *cm_id,
 258                                enum iw_cm_event_type type,
 259                                int status)
 260 {
 261         struct iw_cm_event event;
 262
 263         memset(&event, 0, sizeof(event));
 264         event.event = type;
 265         event.status = status;
 266         switch (type) {
 267         case IW_CM_EVENT_CONNECT_REQUEST:
 268                 if (cm_node->ipv4)
 269                         i40iw_fill_sockaddr4(cm_node, &event);
 270                 else
 271                         i40iw_fill_sockaddr6(cm_node, &event);
 272                 event.provider_data = (void *)cm_node;
 273                 event.private_data = (void *)cm_node->pdata_buf;
 274                 event.private_data_len = (u8)cm_node->pdata.size;
 275                 event.ird = cm_node->ird_size;
 276                 break;
 277         case IW_CM_EVENT_CONNECT_REPLY:
 278                 i40iw_get_cmevent_info(cm_node, cm_id, &event);
 279                 break;
 280         case IW_CM_EVENT_ESTABLISHED:
 281                 event.ird = cm_node->ird_size;
 282                 event.ord = cm_node->ord_size;
 283                 break;
 284         case IW_CM_EVENT_DISCONNECT:
 285                 break;
 286         case IW_CM_EVENT_CLOSE:
 287                 break;
 288         default:
 289                 i40iw_pr_err("event type received type = %d\n", type);
 290                 return -1;
 291         }
 292         return cm_id->event_handler(cm_id, &event);
 293 }
 294
 295 /**
 296  * i40iw_create_event - create cm event
 297  * @cm_node: connection's node
 298  * @type: Event type to generate
 299  */
 300 static struct i40iw_cm_event *i40iw_create_event(struct i40iw_cm_node *cm_node,
 301                                                  enum i40iw_cm_event_type type)
 302 {
 303         struct i40iw_cm_event *event;
 304
 305         if (!cm_node->cm_id)
 306                 return NULL;
 307
 308         event = kzalloc(sizeof(*event), GFP_ATOMIC);
 309
 310         if (!event)
 311                 return NULL;
 312
 313         event->type = type;
 314         event->cm_node = cm_node;
 315         memcpy(event->cm_info.rem_addr, cm_node->rem_addr, sizeof(event->cm_info.rem_addr));
 316         memcpy(event->cm_info.loc_addr, cm_node->loc_addr, sizeof(event->cm_info.loc_addr));
 317         event->cm_info.rem_port = cm_node->rem_port;
 318         event->cm_info.loc_port = cm_node->loc_port;
 319         event->cm_info.cm_id = cm_node->cm_id;
 320
 321         i40iw_debug(cm_node->dev,
 322                     I40IW_DEBUG_CM,
 323                     "node=%p event=%p type=%u dst=%pI4 src=%pI4\n",
 324                     cm_node,
 325                     event,
 326                     type,
 327                     event->cm_info.loc_addr,
 328                     event->cm_info.rem_addr);
 329
 330         i40iw_cm_post_event(event);
 331         return event;
 332 }
 333
 334 /**
 335  * i40iw_free_retrans_entry - free send entry
 336  * @cm_node: connection's node
 337  */
 338 static void i40iw_free_retrans_entry(struct i40iw_cm_node *cm_node)
 339 {
 340         struct i40iw_device *iwdev = cm_node->iwdev;
 341         struct i40iw_timer_entry *send_entry;
 342
 343         send_entry = cm_node->send_entry;
 344         if (send_entry) {
 345                 cm_node->send_entry = NULL;
 346                 i40iw_free_sqbuf(&iwdev->vsi, (void *)send_entry->sqbuf);
 347                 kfree(send_entry);
 348                 atomic_dec(&cm_node->ref_count);
 349         }
 350 }
 351
 352 /**
 353  * i40iw_cleanup_retrans_entry - free send entry with lock
 354  * @cm_node: connection's node
 355  */
 356 static void i40iw_cleanup_retrans_entry(struct i40iw_cm_node *cm_node)
 357 {
 358         unsigned long flags;
 359
 360         spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
 361         i40iw_free_retrans_entry(cm_node);
 362         spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
 363 }
 364
 365 /**
 366  * i40iw_form_cm_frame - get a free packet and build frame
 367  * @cm_node: connection's node ionfo to use in frame
 368  * @options: pointer to options info
 369  * @hdr: pointer mpa header
 370  * @pdata: pointer to private data
 371  * @flags:  indicates FIN or ACK
 372  */
 373 static struct i40iw_puda_buf *i40iw_form_cm_frame(struct i40iw_cm_node *cm_node,
 374                                                   struct i40iw_kmem_info *options,
 375                                                   struct i40iw_kmem_info *hdr,
 376                                                   struct i40iw_kmem_info *pdata,
 377                                                   u8 flags)
 378 {
 379         struct i40iw_puda_buf *sqbuf;
 380         struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi;
 381         u8 *buf;
 382
 383         struct tcphdr *tcph;
 384         struct iphdr *iph;
 385         struct ipv6hdr *ip6h;
 386         struct ethhdr *ethh;
 387         u16 packetsize;
 388         u16 eth_hlen = ETH_HLEN;
 389         u32 opts_len = 0;
 390         u32 pd_len = 0;
 391         u32 hdr_len = 0;
 392         u16 vtag;
 393
 394         sqbuf = i40iw_puda_get_bufpool(vsi->ilq);
 395         if (!sqbuf)
 396                 return NULL;
 397         buf = sqbuf->mem.va;
 398
 399         if (options)
 400                 opts_len = (u32)options->size;
 401
 402         if (hdr)
 403                 hdr_len = hdr->size;
 404
 405         if (pdata)
 406                 pd_len = pdata->size;
 407
 408         if (cm_node->vlan_id < VLAN_TAG_PRESENT)
 409                 eth_hlen += 4;
 410
 411         if (cm_node->ipv4)
 412                 packetsize = sizeof(*iph) + sizeof(*tcph);
 413         else
 414                 packetsize = sizeof(*ip6h) + sizeof(*tcph);
 415         packetsize += opts_len + hdr_len + pd_len;
 416
 417         memset(buf, 0x00, eth_hlen + packetsize);
 418
 419         sqbuf->totallen = packetsize + eth_hlen;
 420         sqbuf->maclen = eth_hlen;
 421         sqbuf->tcphlen = sizeof(*tcph) + opts_len;
 422         sqbuf->scratch = (void *)cm_node;
 423
 424         ethh = (struct ethhdr *)buf;
 425         buf += eth_hlen;
 426
 427         if (cm_node->ipv4) {
 428                 sqbuf->ipv4 = true;
 429
 430                 iph = (struct iphdr *)buf;
 431                 buf += sizeof(*iph);
 432                 tcph = (struct tcphdr *)buf;
 433                 buf += sizeof(*tcph);
 434
 435                 ether_addr_copy(ethh->h_dest, cm_node->rem_mac);
 436                 ether_addr_copy(ethh->h_source, cm_node->loc_mac);
 437                 if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
 438                         ((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q);
 439                         vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) | cm_node->vlan_id;
 440                         ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(vtag);
 441
 442                         ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IP);
 443                 } else {
 444                         ethh->h_proto = htons(ETH_P_IP);
 445                 }
 446
 447                 iph->version = IPVERSION;
 448                 iph->ihl = 5;   /* 5 * 4Byte words, IP headr len */
 449                 iph->tos = cm_node->tos;
 450                 iph->tot_len = htons(packetsize);
 451                 iph->id = htons(++cm_node->tcp_cntxt.loc_id);
 452
 453                 iph->frag_off = htons(0x4000);
 454                 iph->ttl = 0x40;
 455                 iph->protocol = IPPROTO_TCP;
 456                 iph->saddr = htonl(cm_node->loc_addr[0]);
 457                 iph->daddr = htonl(cm_node->rem_addr[0]);
 458         } else {
 459                 sqbuf->ipv4 = false;
 460                 ip6h = (struct ipv6hdr *)buf;
 461                 buf += sizeof(*ip6h);
 462                 tcph = (struct tcphdr *)buf;
 463                 buf += sizeof(*tcph);
 464
 465                 ether_addr_copy(ethh->h_dest, cm_node->rem_mac);
 466                 ether_addr_copy(ethh->h_source, cm_node->loc_mac);
 467                 if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
 468                         ((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q);
 469                         vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) | cm_node->vlan_id;
 470                         ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(vtag);
 471                         ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IPV6);
 472                 } else {
 473                         ethh->h_proto = htons(ETH_P_IPV6);
 474                 }
 475                 ip6h->version = 6;
 476                 ip6h->priority = cm_node->tos >> 4;
 477                 ip6h->flow_lbl[0] = cm_node->tos << 4;
 478                 ip6h->flow_lbl[1] = 0;
 479                 ip6h->flow_lbl[2] = 0;
 480                 ip6h->payload_len = htons(packetsize - sizeof(*ip6h));
 481                 ip6h->nexthdr = 6;
 482                 ip6h->hop_limit = 128;
 483                 i40iw_copy_ip_htonl(ip6h->saddr.in6_u.u6_addr32,
 484                                     cm_node->loc_addr);
 485                 i40iw_copy_ip_htonl(ip6h->daddr.in6_u.u6_addr32,
 486                                     cm_node->rem_addr);
 487         }
 488
 489         tcph->source = htons(cm_node->loc_port);
 490         tcph->dest = htons(cm_node->rem_port);
 491
 492         tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
 493
 494         if (flags & SET_ACK) {
 495                 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
 496                 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
 497                 tcph->ack = 1;
 498         } else {
 499                 tcph->ack_seq = 0;
 500         }
 501
 502         if (flags & SET_SYN) {
 503                 cm_node->tcp_cntxt.loc_seq_num++;
 504                 tcph->syn = 1;
 505         } else {
 506                 cm_node->tcp_cntxt.loc_seq_num += hdr_len + pd_len;
 507         }
 508
 509         if (flags & SET_FIN) {
 510                 cm_node->tcp_cntxt.loc_seq_num++;
 511                 tcph->fin = 1;
 512         }
 513
 514         if (flags & SET_RST)
 515                 tcph->rst = 1;
 516
 517         tcph->doff = (u16)((sizeof(*tcph) + opts_len + 3) >> 2);
 518         sqbuf->tcphlen = tcph->doff << 2;
 519         tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
 520         tcph->urg_ptr = 0;
 521
 522         if (opts_len) {
 523                 memcpy(buf, options->addr, opts_len);
 524                 buf += opts_len;
 525         }
 526
 527         if (hdr_len) {
 528                 memcpy(buf, hdr->addr, hdr_len);
 529                 buf += hdr_len;
 530         }
 531
 532         if (pdata && pdata->addr)
 533                 memcpy(buf, pdata->addr, pdata->size);
 534
 535         atomic_set(&sqbuf->refcount, 1);
 536
 537         return sqbuf;
 538 }
 539
 540 /**
 541  * i40iw_send_reset - Send RST packet
 542  * @cm_node: connection's node
 543  */
 544 static int i40iw_send_reset(struct i40iw_cm_node *cm_node)
 545 {
 546         struct i40iw_puda_buf *sqbuf;
 547         int flags = SET_RST | SET_ACK;
 548
 549         sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, flags);
 550         if (!sqbuf) {
 551                 i40iw_pr_err("no sqbuf\n");
 552                 return -1;
 553         }
 554
 555         return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 0, 1);
 556 }
 557
 558 /**
 559  * i40iw_active_open_err - send event for active side cm error
 560  * @cm_node: connection's node
 561  * @reset: Flag to send reset or not
 562  */
 563 static void i40iw_active_open_err(struct i40iw_cm_node *cm_node, bool reset)
 564 {
 565         i40iw_cleanup_retrans_entry(cm_node);
 566         cm_node->cm_core->stats_connect_errs++;
 567         if (reset) {
 568                 i40iw_debug(cm_node->dev,
 569                             I40IW_DEBUG_CM,
 570                             "%s cm_node=%p state=%d\n",
 571                             __func__,
 572                             cm_node,
 573                             cm_node->state);
 574                 atomic_inc(&cm_node->ref_count);
 575                 i40iw_send_reset(cm_node);
 576         }
 577
 578         cm_node->state = I40IW_CM_STATE_CLOSED;
 579         i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
 580 }
 581
 582 /**
 583  * i40iw_passive_open_err - handle passive side cm error
 584  * @cm_node: connection's node
 585  * @reset: send reset or just free cm_node
 586  */
 587 static void i40iw_passive_open_err(struct i40iw_cm_node *cm_node, bool reset)
 588 {
 589         i40iw_cleanup_retrans_entry(cm_node);
 590         cm_node->cm_core->stats_passive_errs++;
 591         cm_node->state = I40IW_CM_STATE_CLOSED;
 592         i40iw_debug(cm_node->dev,
 593                     I40IW_DEBUG_CM,
 594                     "%s cm_node=%p state =%d\n",
 595                     __func__,
 596                     cm_node,
 597                     cm_node->state);
 598         if (reset)
 599                 i40iw_send_reset(cm_node);
 600         else
 601                 i40iw_rem_ref_cm_node(cm_node);
 602 }
 603
 604 /**
 605  * i40iw_event_connect_error - to create connect error event
 606  * @event: cm information for connect event
 607  */
 608 static void i40iw_event_connect_error(struct i40iw_cm_event *event)
 609 {
 610         struct i40iw_qp *iwqp;
 611         struct iw_cm_id *cm_id;
 612
 613         cm_id = event->cm_node->cm_id;
 614         if (!cm_id)
 615                 return;
 616
 617         iwqp = cm_id->provider_data;
 618
 619         if (!iwqp || !iwqp->iwdev)
 620                 return;
 621
 622         iwqp->cm_id = NULL;
 623         cm_id->provider_data = NULL;
 624         i40iw_send_cm_event(event->cm_node, cm_id,
 625                             IW_CM_EVENT_CONNECT_REPLY,
 626                             -ECONNRESET);
 627         cm_id->rem_ref(cm_id);
 628         i40iw_rem_ref_cm_node(event->cm_node);
 629 }
 630
 631 /**
 632  * i40iw_process_options
 633  * @cm_node: connection's node
 634  * @optionsloc: point to start of options
 635  * @optionsize: size of all options
 636  * @syn_packet: flag if syn packet
 637  */
 638 static int i40iw_process_options(struct i40iw_cm_node *cm_node,
 639                                  u8 *optionsloc,
 640                                  u32 optionsize,
 641                                  u32 syn_packet)
 642 {
 643         u32 tmp;
 644         u32 offset = 0;
 645         union all_known_options *all_options;
 646         char got_mss_option = 0;
 647
 648         while (offset < optionsize) {
 649                 all_options = (union all_known_options *)(optionsloc + offset);
 650                 switch (all_options->as_base.optionnum) {
 651                 case OPTION_NUMBER_END:
 652                         offset = optionsize;
 653                         break;
 654                 case OPTION_NUMBER_NONE:
 655                         offset += 1;
 656                         continue;
 657                 case OPTION_NUMBER_MSS:
 658                         i40iw_debug(cm_node->dev,
 659                                     I40IW_DEBUG_CM,
 660                                     "%s: MSS Length: %d Offset: %d Size: %d\n",
 661                                     __func__,
 662                                     all_options->as_mss.length,
 663                                     offset,
 664                                     optionsize);
 665                         got_mss_option = 1;
 666                         if (all_options->as_mss.length != 4)
 667                                 return -1;
 668                         tmp = ntohs(all_options->as_mss.mss);
 669                         if (tmp > 0 && tmp < cm_node->tcp_cntxt.mss)
 670                                 cm_node->tcp_cntxt.mss = tmp;
 671                         break;
 672                 case OPTION_NUMBER_WINDOW_SCALE:
 673                         cm_node->tcp_cntxt.snd_wscale =
 674                             all_options->as_windowscale.shiftcount;
 675                         break;
 676                 default:
 677                         i40iw_debug(cm_node->dev,
 678                                     I40IW_DEBUG_CM,
 679                                     "TCP Option not understood: %x\n",
 680                                     all_options->as_base.optionnum);
 681                         break;
 682                 }
 683                 offset += all_options->as_base.length;
 684         }
 685         if (!got_mss_option && syn_packet)
 686                 cm_node->tcp_cntxt.mss = I40IW_CM_DEFAULT_MSS;
 687         return 0;
 688 }
 689
 690 /**
 691  * i40iw_handle_tcp_options -
 692  * @cm_node: connection's node
 693  * @tcph: pointer tcp header
 694  * @optionsize: size of options rcvd
 695  * @passive: active or passive flag
 696  */
 697 static int i40iw_handle_tcp_options(struct i40iw_cm_node *cm_node,
 698                                     struct tcphdr *tcph,
 699                                     int optionsize,
 700                                     int passive)
 701 {
 702         u8 *optionsloc = (u8 *)&tcph[1];
 703
 704         if (optionsize) {
 705                 if (i40iw_process_options(cm_node,
 706                                           optionsloc,
 707                                           optionsize,
 708                                           (u32)tcph->syn)) {
 709                         i40iw_debug(cm_node->dev,
 710                                     I40IW_DEBUG_CM,
 711                                     "%s: Node %p, Sending RESET\n",
 712                                     __func__,
 713                                     cm_node);
 714                         if (passive)
 715                                 i40iw_passive_open_err(cm_node, true);
 716                         else
 717                                 i40iw_active_open_err(cm_node, true);
 718                         return -1;
 719                 }
 720         }
 721
 722         cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
 723             cm_node->tcp_cntxt.snd_wscale;
 724
 725         if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
 726                 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
 727         return 0;
 728 }
 729
 730 /**
 731  * i40iw_build_mpa_v1 - build a MPA V1 frame
 732  * @cm_node: connection's node
 733  * @mpa_key: to do read0 or write0
 734  */
 735 static void i40iw_build_mpa_v1(struct i40iw_cm_node *cm_node,
 736                                void *start_addr,
 737                                u8 mpa_key)
 738 {
 739         struct ietf_mpa_v1 *mpa_frame = (struct ietf_mpa_v1 *)start_addr;
 740
 741         switch (mpa_key) {
 742         case MPA_KEY_REQUEST:
 743                 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
 744                 break;
 745         case MPA_KEY_REPLY:
 746                 memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
 747                 break;
 748         default:
 749                 break;
 750         }
 751         mpa_frame->flags = IETF_MPA_FLAGS_CRC;
 752         mpa_frame->rev = cm_node->mpa_frame_rev;
 753         mpa_frame->priv_data_len = htons(cm_node->pdata.size);
 754 }
 755
 756 /**
 757  * i40iw_build_mpa_v2 - build a MPA V2 frame
 758  * @cm_node: connection's node
 759  * @start_addr: buffer start address
 760  * @mpa_key: to do read0 or write0
 761  */
 762 static void i40iw_build_mpa_v2(struct i40iw_cm_node *cm_node,
 763                                void *start_addr,
 764                                u8 mpa_key)
 765 {
 766         struct ietf_mpa_v2 *mpa_frame = (struct ietf_mpa_v2 *)start_addr;
 767         struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg;
 768         u16 ctrl_ird, ctrl_ord;
 769
 770         /* initialize the upper 5 bytes of the frame */
 771         i40iw_build_mpa_v1(cm_node, start_addr, mpa_key);
 772         mpa_frame->flags |= IETF_MPA_V2_FLAG;
 773         mpa_frame->priv_data_len += htons(IETF_RTR_MSG_SIZE);
 774
 775         /* initialize RTR msg */
 776         if (cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) {
 777                 ctrl_ird = IETF_NO_IRD_ORD;
 778                 ctrl_ord = IETF_NO_IRD_ORD;
 779         } else {
 780                 ctrl_ird = (cm_node->ird_size > IETF_NO_IRD_ORD) ?
 781                         IETF_NO_IRD_ORD : cm_node->ird_size;
 782                 ctrl_ord = (cm_node->ord_size > IETF_NO_IRD_ORD) ?
 783                         IETF_NO_IRD_ORD : cm_node->ord_size;
 784         }
 785
 786         ctrl_ird |= IETF_PEER_TO_PEER;
 787
 788         switch (mpa_key) {
 789         case MPA_KEY_REQUEST:
 790                 ctrl_ord |= IETF_RDMA0_WRITE;
 791                 ctrl_ord |= IETF_RDMA0_READ;
 792                 break;
 793         case MPA_KEY_REPLY:
 794                 switch (cm_node->send_rdma0_op) {
 795                 case SEND_RDMA_WRITE_ZERO:
 796                         ctrl_ord |= IETF_RDMA0_WRITE;
 797                         break;
 798                 case SEND_RDMA_READ_ZERO:
 799                         ctrl_ord |= IETF_RDMA0_READ;
 800                         break;
 801                 }
 802                 break;
 803         default:
 804                 break;
 805         }
 806         rtr_msg->ctrl_ird = htons(ctrl_ird);
 807         rtr_msg->ctrl_ord = htons(ctrl_ord);
 808 }
 809
 810 /**
 811  * i40iw_cm_build_mpa_frame - build mpa frame for mpa version 1 or version 2
 812  * @cm_node: connection's node
 813  * @mpa: mpa: data buffer
 814  * @mpa_key: to do read0 or write0
 815  */
 816 static int i40iw_cm_build_mpa_frame(struct i40iw_cm_node *cm_node,
 817                                     struct i40iw_kmem_info *mpa,
 818                                     u8 mpa_key)
 819 {
 820         int hdr_len = 0;
 821
 822         switch (cm_node->mpa_frame_rev) {
 823         case IETF_MPA_V1:
 824                 hdr_len = sizeof(struct ietf_mpa_v1);
 825                 i40iw_build_mpa_v1(cm_node, mpa->addr, mpa_key);
 826                 break;
 827         case IETF_MPA_V2:
 828                 hdr_len = sizeof(struct ietf_mpa_v2);
 829                 i40iw_build_mpa_v2(cm_node, mpa->addr, mpa_key);
 830                 break;
 831         default:
 832                 break;
 833         }
 834
 835         return hdr_len;
 836 }
 837
 838 /**
 839  * i40iw_send_mpa_request - active node send mpa request to passive node
 840  * @cm_node: connection's node
 841  */
 842 static int i40iw_send_mpa_request(struct i40iw_cm_node *cm_node)
 843 {
 844         struct i40iw_puda_buf *sqbuf;
 845
 846         if (!cm_node) {
 847                 i40iw_pr_err("cm_node == NULL\n");
 848                 return -1;
 849         }
 850
 851         cm_node->mpa_hdr.addr = &cm_node->mpa_frame;
 852         cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node,
 853                                                          &cm_node->mpa_hdr,
 854                                                          MPA_KEY_REQUEST);
 855         if (!cm_node->mpa_hdr.size) {
 856                 i40iw_pr_err("mpa size = %d\n", cm_node->mpa_hdr.size);
 857                 return -1;
 858         }
 859
 860         sqbuf = i40iw_form_cm_frame(cm_node,
 861                                     NULL,
 862                                     &cm_node->mpa_hdr,
 863                                     &cm_node->pdata,
 864                                     SET_ACK);
 865         if (!sqbuf) {
 866                 i40iw_pr_err("sq_buf == NULL\n");
 867                 return -1;
 868         }
 869         return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
 870 }
 871
 872 /**
 873  * i40iw_send_mpa_reject -
 874  * @cm_node: connection's node
 875  * @pdata: reject data for connection
 876  * @plen: length of reject data
 877  */
 878 static int i40iw_send_mpa_reject(struct i40iw_cm_node *cm_node,
 879                                  const void *pdata,
 880                                  u8 plen)
 881 {
 882         struct i40iw_puda_buf *sqbuf;
 883         struct i40iw_kmem_info priv_info;
 884
 885         cm_node->mpa_hdr.addr = &cm_node->mpa_frame;
 886         cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node,
 887                                                          &cm_node->mpa_hdr,
 888                                                          MPA_KEY_REPLY);
 889
 890         cm_node->mpa_frame.flags |= IETF_MPA_FLAGS_REJECT;
 891         priv_info.addr = (void *)pdata;
 892         priv_info.size = plen;
 893
 894         sqbuf = i40iw_form_cm_frame(cm_node,
 895                                     NULL,
 896                                     &cm_node->mpa_hdr,
 897                                     &priv_info,
 898                                     SET_ACK | SET_FIN);
 899         if (!sqbuf) {
 900                 i40iw_pr_err("no sqbuf\n");
 901                 return -ENOMEM;
 902         }
 903         cm_node->state = I40IW_CM_STATE_FIN_WAIT1;
 904         return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
 905 }
 906
 907 /**
 908  * recv_mpa - process an IETF MPA frame
 909  * @cm_node: connection's node
 910  * @buffer: Data pointer
 911  * @type: to return accept or reject
 912  * @len: Len of mpa buffer
 913  */
 914 static int i40iw_parse_mpa(struct i40iw_cm_node *cm_node, u8 *buffer, u32 *type, u32 len)
 915 {
 916         struct ietf_mpa_v1 *mpa_frame;
 917         struct ietf_mpa_v2 *mpa_v2_frame;
 918         struct ietf_rtr_msg *rtr_msg;
 919         int mpa_hdr_len;
 920         int priv_data_len;
 921
 922         *type = I40IW_MPA_REQUEST_ACCEPT;
 923
 924         if (len < sizeof(struct ietf_mpa_v1)) {
 925                 i40iw_pr_err("ietf buffer small (%x)\n", len);
 926                 return -1;
 927         }
 928
 929         mpa_frame = (struct ietf_mpa_v1 *)buffer;
 930         mpa_hdr_len = sizeof(struct ietf_mpa_v1);
 931         priv_data_len = ntohs(mpa_frame->priv_data_len);
 932
 933         if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) {
 934                 i40iw_pr_err("large pri_data %d\n", priv_data_len);
 935                 return -1;
 936         }
 937         if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) {
 938                 i40iw_pr_err("unsupported mpa rev = %d\n", mpa_frame->rev);
 939                 return -1;
 940         }
 941         if (mpa_frame->rev > cm_node->mpa_frame_rev) {
 942                 i40iw_pr_err("rev %d\n", mpa_frame->rev);
 943                 return -1;
 944         }
 945         cm_node->mpa_frame_rev = mpa_frame->rev;
 946
 947         if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) {
 948                 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) {
 949                         i40iw_pr_err("Unexpected MPA Key received\n");
 950                         return -1;
 951                 }
 952         } else {
 953                 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) {
 954                         i40iw_pr_err("Unexpected MPA Key received\n");
 955                         return -1;
 956                 }
 957         }
 958
 959         if (priv_data_len + mpa_hdr_len > len) {
 960                 i40iw_pr_err("ietf buffer len(%x + %x != %x)\n",
 961                              priv_data_len, mpa_hdr_len, len);
 962                 return -1;
 963         }
 964         if (len > MAX_CM_BUFFER) {
 965                 i40iw_pr_err("ietf buffer large len = %d\n", len);
 966                 return -1;
 967         }
 968
 969         switch (mpa_frame->rev) {
 970         case IETF_MPA_V2:{
 971                         u16 ird_size;
 972                         u16 ord_size;
 973                         u16 ctrl_ord;
 974                         u16 ctrl_ird;
 975
 976                         mpa_v2_frame = (struct ietf_mpa_v2 *)buffer;
 977                         mpa_hdr_len += IETF_RTR_MSG_SIZE;
 978                         rtr_msg = &mpa_v2_frame->rtr_msg;
 979
 980                         /* parse rtr message */
 981                         ctrl_ord = ntohs(rtr_msg->ctrl_ord);
 982                         ctrl_ird = ntohs(rtr_msg->ctrl_ird);
 983                         ird_size = ctrl_ird & IETF_NO_IRD_ORD;
 984                         ord_size = ctrl_ord & IETF_NO_IRD_ORD;
 985
 986                         if (!(ctrl_ird & IETF_PEER_TO_PEER))
 987                                 return -1;
 988
 989                         if (ird_size == IETF_NO_IRD_ORD || ord_size == IETF_NO_IRD_ORD) {
 990                                 cm_node->mpav2_ird_ord = IETF_NO_IRD_ORD;
 991                                 goto negotiate_done;
 992                         }
 993
 994                         if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) {
 995                                 /* responder */
 996                                 if (!ord_size && (ctrl_ord & IETF_RDMA0_READ))
 997                                         cm_node->ird_size = 1;
 998                                 if (cm_node->ord_size > ird_size)
 999                                         cm_node->ord_size = ird_size;
1000                         } else {
1001                                 /* initiator */
1002                                 if (!ird_size && (ctrl_ord & IETF_RDMA0_READ))
1003                                         return -1;
1004                                 if (cm_node->ord_size > ird_size)
1005                                         cm_node->ord_size = ird_size;
1006
1007                                 if (cm_node->ird_size < ord_size)
1008                                         /* no resources available */
1009                                         return -1;
1010                         }
1011
1012 negotiate_done:
1013                         if (ctrl_ord & IETF_RDMA0_READ)
1014                                 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
1015                         else if (ctrl_ord & IETF_RDMA0_WRITE)
1016                                 cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO;
1017                         else    /* Not supported RDMA0 operation */
1018                                 return -1;
1019                         i40iw_debug(cm_node->dev, I40IW_DEBUG_CM,
1020                                     "MPAV2: Negotiated ORD: %d, IRD: %d\n",
1021                                     cm_node->ord_size, cm_node->ird_size);
1022                         break;
1023                 }
1024                 break;
1025         case IETF_MPA_V1:
1026         default:
1027                 break;
1028         }
1029
1030         memcpy(cm_node->pdata_buf, buffer + mpa_hdr_len, priv_data_len);
1031         cm_node->pdata.size = priv_data_len;
1032
1033         if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT)
1034                 *type = I40IW_MPA_REQUEST_REJECT;
1035
1036         if (mpa_frame->flags & IETF_MPA_FLAGS_MARKERS)
1037                 cm_node->snd_mark_en = true;
1038
1039         return 0;
1040 }
1041
1042 /**
1043  * i40iw_schedule_cm_timer
1044  * @@cm_node: connection's node
1045  * @sqbuf: buffer to send
1046  * @type: if it es send ot close
1047  * @send_retrans: if rexmits to be done
1048  * @close_when_complete: is cm_node to be removed
1049  *
1050  * note - cm_node needs to be protected before calling this. Encase in:
1051  *              i40iw_rem_ref_cm_node(cm_core, cm_node);
1052  *              i40iw_schedule_cm_timer(...)
1053  *              atomic_inc(&cm_node->ref_count);
1054  */
1055 int i40iw_schedule_cm_timer(struct i40iw_cm_node *cm_node,
1056                             struct i40iw_puda_buf *sqbuf,
1057                             enum i40iw_timer_type type,
1058                             int send_retrans,
1059                             int close_when_complete)
1060 {
1061         struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi;
1062         struct i40iw_cm_core *cm_core = cm_node->cm_core;
1063         struct i40iw_timer_entry *new_send;
1064         int ret = 0;
1065         u32 was_timer_set;
1066         unsigned long flags;
1067
1068         new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
1069         if (!new_send) {
1070                 i40iw_free_sqbuf(vsi, (void *)sqbuf);
1071                 return -ENOMEM;
1072         }
1073         new_send->retrycount = I40IW_DEFAULT_RETRYS;
1074         new_send->retranscount = I40IW_DEFAULT_RETRANS;
1075         new_send->sqbuf = sqbuf;
1076         new_send->timetosend = jiffies;
1077         new_send->type = type;
1078         new_send->send_retrans = send_retrans;
1079         new_send->close_when_complete = close_when_complete;
1080
1081         if (type == I40IW_TIMER_TYPE_CLOSE) {
1082                 new_send->timetosend += (HZ / 10);
1083                 if (cm_node->close_entry) {
1084                         kfree(new_send);
1085                         i40iw_free_sqbuf(vsi, (void *)sqbuf);
1086                         i40iw_pr_err("already close entry\n");
1087                         return -EINVAL;
1088                 }
1089                 cm_node->close_entry = new_send;
1090         }
1091
1092         if (type == I40IW_TIMER_TYPE_SEND) {
1093                 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1094                 cm_node->send_entry = new_send;
1095                 atomic_inc(&cm_node->ref_count);
1096                 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1097                 new_send->timetosend = jiffies + I40IW_RETRY_TIMEOUT;
1098
1099                 atomic_inc(&sqbuf->refcount);
1100                 i40iw_puda_send_buf(vsi->ilq, sqbuf);
1101                 if (!send_retrans) {
1102                         i40iw_cleanup_retrans_entry(cm_node);
1103                         if (close_when_complete)
1104                                 i40iw_rem_ref_cm_node(cm_node);
1105                         return ret;
1106                 }
1107         }
1108
1109         spin_lock_irqsave(&cm_core->ht_lock, flags);
1110         was_timer_set = timer_pending(&cm_core->tcp_timer);
1111
1112         if (!was_timer_set) {
1113                 cm_core->tcp_timer.expires = new_send->timetosend;
1114                 add_timer(&cm_core->tcp_timer);
1115         }
1116         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1117
1118         return ret;
1119 }
1120
1121 /**
1122  * i40iw_retrans_expired - Could not rexmit the packet
1123  * @cm_node: connection's node
1124  */
1125 static void i40iw_retrans_expired(struct i40iw_cm_node *cm_node)
1126 {
1127         struct iw_cm_id *cm_id = cm_node->cm_id;
1128         enum i40iw_cm_node_state state = cm_node->state;
1129
1130         cm_node->state = I40IW_CM_STATE_CLOSED;
1131         switch (state) {
1132         case I40IW_CM_STATE_SYN_RCVD:
1133         case I40IW_CM_STATE_CLOSING:
1134                 i40iw_rem_ref_cm_node(cm_node);
1135                 break;
1136         case I40IW_CM_STATE_FIN_WAIT1:
1137         case I40IW_CM_STATE_LAST_ACK:
1138                 if (cm_node->cm_id)
1139                         cm_id->rem_ref(cm_id);
1140                 i40iw_send_reset(cm_node);
1141                 break;
1142         default:
1143                 atomic_inc(&cm_node->ref_count);
1144                 i40iw_send_reset(cm_node);
1145                 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
1146                 break;
1147         }
1148 }
1149
1150 /**
1151  * i40iw_handle_close_entry - for handling retry/timeouts
1152  * @cm_node: connection's node
1153  * @rem_node: flag for remove cm_node
1154  */
1155 static void i40iw_handle_close_entry(struct i40iw_cm_node *cm_node, u32 rem_node)
1156 {
1157         struct i40iw_timer_entry *close_entry = cm_node->close_entry;
1158         struct iw_cm_id *cm_id = cm_node->cm_id;
1159         struct i40iw_qp *iwqp;
1160         unsigned long flags;
1161
1162         if (!close_entry)
1163                 return;
1164         iwqp = (struct i40iw_qp *)close_entry->sqbuf;
1165         if (iwqp) {
1166                 spin_lock_irqsave(&iwqp->lock, flags);
1167                 if (iwqp->cm_id) {
1168                         iwqp->hw_tcp_state = I40IW_TCP_STATE_CLOSED;
1169                         iwqp->hw_iwarp_state = I40IW_QP_STATE_ERROR;
1170                         iwqp->last_aeq = I40IW_AE_RESET_SENT;
1171                         iwqp->ibqp_state = IB_QPS_ERR;
1172                         spin_unlock_irqrestore(&iwqp->lock, flags);
1173                         i40iw_cm_disconn(iwqp);
1174                 } else {
1175                         spin_unlock_irqrestore(&iwqp->lock, flags);
1176                 }
1177         } else if (rem_node) {
1178                 /* TIME_WAIT state */
1179                 i40iw_rem_ref_cm_node(cm_node);
1180         }
1181         if (cm_id)
1182                 cm_id->rem_ref(cm_id);
1183         kfree(close_entry);
1184         cm_node->close_entry = NULL;
1185 }
1186
1187 /**
1188  * i40iw_cm_timer_tick - system's timer expired callback
1189  * @pass: Pointing to cm_core
1190  */
1191 static void i40iw_cm_timer_tick(unsigned long pass)
1192 {
1193         unsigned long nexttimeout = jiffies + I40IW_LONG_TIME;
1194         struct i40iw_cm_node *cm_node;
1195         struct i40iw_timer_entry *send_entry, *close_entry;
1196         struct list_head *list_core_temp;
1197         struct i40iw_sc_vsi *vsi;
1198         struct list_head *list_node;
1199         struct i40iw_cm_core *cm_core = (struct i40iw_cm_core *)pass;
1200         u32 settimer = 0;
1201         unsigned long timetosend;
1202         struct i40iw_sc_dev *dev;
1203         unsigned long flags;
1204
1205         struct list_head timer_list;
1206
1207         INIT_LIST_HEAD(&timer_list);
1208         spin_lock_irqsave(&cm_core->ht_lock, flags);
1209
1210         list_for_each_safe(list_node, list_core_temp, &cm_core->connected_nodes) {
1211                 cm_node = container_of(list_node, struct i40iw_cm_node, list);
1212                 if (cm_node->close_entry || cm_node->send_entry) {
1213                         atomic_inc(&cm_node->ref_count);
1214                         list_add(&cm_node->timer_entry, &timer_list);
1215                 }
1216         }
1217         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1218
1219         list_for_each_safe(list_node, list_core_temp, &timer_list) {
1220                 cm_node = container_of(list_node,
1221                                        struct i40iw_cm_node,
1222                                        timer_entry);
1223                 close_entry = cm_node->close_entry;
1224
1225                 if (close_entry) {
1226                         if (time_after(close_entry->timetosend, jiffies)) {
1227                                 if (nexttimeout > close_entry->timetosend ||
1228                                     !settimer) {
1229                                         nexttimeout = close_entry->timetosend;
1230                                         settimer = 1;
1231                                 }
1232                         } else {
1233                                 i40iw_handle_close_entry(cm_node, 1);
1234                         }
1235                 }
1236
1237                 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1238
1239                 send_entry = cm_node->send_entry;
1240                 if (!send_entry)
1241                         goto done;
1242                 if (time_after(send_entry->timetosend, jiffies)) {
1243                         if (cm_node->state != I40IW_CM_STATE_OFFLOADED) {
1244                                 if ((nexttimeout > send_entry->timetosend) ||
1245                                     !settimer) {
1246                                         nexttimeout = send_entry->timetosend;
1247                                         settimer = 1;
1248                                 }
1249                         } else {
1250                                 i40iw_free_retrans_entry(cm_node);
1251                         }
1252                         goto done;
1253                 }
1254
1255                 if ((cm_node->state == I40IW_CM_STATE_OFFLOADED) ||
1256                     (cm_node->state == I40IW_CM_STATE_CLOSED)) {
1257                         i40iw_free_retrans_entry(cm_node);
1258                         goto done;
1259                 }
1260
1261                 if (!send_entry->retranscount || !send_entry->retrycount) {
1262                         i40iw_free_retrans_entry(cm_node);
1263
1264                         spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1265                         i40iw_retrans_expired(cm_node);
1266                         cm_node->state = I40IW_CM_STATE_CLOSED;
1267                         spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1268                         goto done;
1269                 }
1270                 cm_node->cm_core->stats_pkt_retrans++;
1271                 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1272
1273                 vsi = &cm_node->iwdev->vsi;
1274                 dev = cm_node->dev;
1275                 atomic_inc(&send_entry->sqbuf->refcount);
1276                 i40iw_puda_send_buf(vsi->ilq, send_entry->sqbuf);
1277                 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1278                 if (send_entry->send_retrans) {
1279                         send_entry->retranscount--;
1280                         timetosend = (I40IW_RETRY_TIMEOUT <<
1281                                       (I40IW_DEFAULT_RETRANS -
1282                                        send_entry->retranscount));
1283
1284                         send_entry->timetosend = jiffies +
1285                             min(timetosend, I40IW_MAX_TIMEOUT);
1286                         if (nexttimeout > send_entry->timetosend || !settimer) {
1287                                 nexttimeout = send_entry->timetosend;
1288                                 settimer = 1;
1289                         }
1290                 } else {
1291                         int close_when_complete;
1292
1293                         close_when_complete = send_entry->close_when_complete;
1294                         i40iw_debug(cm_node->dev,
1295                                     I40IW_DEBUG_CM,
1296                                     "cm_node=%p state=%d\n",
1297                                     cm_node,
1298                                     cm_node->state);
1299                         i40iw_free_retrans_entry(cm_node);
1300                         if (close_when_complete)
1301                                 i40iw_rem_ref_cm_node(cm_node);
1302                 }
1303 done:
1304                 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1305                 i40iw_rem_ref_cm_node(cm_node);
1306         }
1307
1308         if (settimer) {
1309                 spin_lock_irqsave(&cm_core->ht_lock, flags);
1310                 if (!timer_pending(&cm_core->tcp_timer)) {
1311                         cm_core->tcp_timer.expires = nexttimeout;
1312                         add_timer(&cm_core->tcp_timer);
1313                 }
1314                 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1315         }
1316 }
1317
1318 /**
1319  * i40iw_send_syn - send SYN packet
1320  * @cm_node: connection's node
1321  * @sendack: flag to set ACK bit or not
1322  */
1323 int i40iw_send_syn(struct i40iw_cm_node *cm_node, u32 sendack)
1324 {
1325         struct i40iw_puda_buf *sqbuf;
1326         int flags = SET_SYN;
1327         char optionsbuffer[sizeof(struct option_mss) +
1328                            sizeof(struct option_windowscale) +
1329                            sizeof(struct option_base) + TCP_OPTIONS_PADDING];
1330         struct i40iw_kmem_info opts;
1331
1332         int optionssize = 0;
1333         /* Sending MSS option */
1334         union all_known_options *options;
1335
1336         opts.addr = optionsbuffer;
1337         if (!cm_node) {
1338                 i40iw_pr_err("no cm_node\n");
1339                 return -EINVAL;
1340         }
1341
1342         options = (union all_known_options *)&optionsbuffer[optionssize];
1343         options->as_mss.optionnum = OPTION_NUMBER_MSS;
1344         options->as_mss.length = sizeof(struct option_mss);
1345         options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
1346         optionssize += sizeof(struct option_mss);
1347
1348         options = (union all_known_options *)&optionsbuffer[optionssize];
1349         options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
1350         options->as_windowscale.length = sizeof(struct option_windowscale);
1351         options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
1352         optionssize += sizeof(struct option_windowscale);
1353         options = (union all_known_options *)&optionsbuffer[optionssize];
1354         options->as_end = OPTION_NUMBER_END;
1355         optionssize += 1;
1356
1357         if (sendack)
1358                 flags |= SET_ACK;
1359
1360         opts.size = optionssize;
1361
1362         sqbuf = i40iw_form_cm_frame(cm_node, &opts, NULL, NULL, flags);
1363         if (!sqbuf) {
1364                 i40iw_pr_err("no sqbuf\n");
1365                 return -1;
1366         }
1367         return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
1368 }
1369
1370 /**
1371  * i40iw_send_ack - Send ACK packet
1372  * @cm_node: connection's node
1373  */
1374 static void i40iw_send_ack(struct i40iw_cm_node *cm_node)
1375 {
1376         struct i40iw_puda_buf *sqbuf;
1377         struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi;
1378
1379         sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK);
1380         if (sqbuf)
1381                 i40iw_puda_send_buf(vsi->ilq, sqbuf);
1382         else
1383                 i40iw_pr_err("no sqbuf\n");
1384 }
1385
1386 /**
1387  * i40iw_send_fin - Send FIN pkt
1388  * @cm_node: connection's node
1389  */
1390 static int i40iw_send_fin(struct i40iw_cm_node *cm_node)
1391 {
1392         struct i40iw_puda_buf *sqbuf;
1393
1394         sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK | SET_FIN);
1395         if (!sqbuf) {
1396                 i40iw_pr_err("no sqbuf\n");
1397                 return -1;
1398         }
1399         return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
1400 }
1401
1402 /**
1403  * i40iw_find_node - find a cm node that matches the reference cm node
1404  * @cm_core: cm's core
1405  * @rem_port: remote tcp port num
1406  * @rem_addr: remote ip addr
1407  * @loc_port: local tcp port num
1408  * @loc_addr: loc ip addr
1409  * @add_refcnt: flag to increment refcount of cm_node
1410  */
1411 struct i40iw_cm_node *i40iw_find_node(struct i40iw_cm_core *cm_core,
1412                                       u16 rem_port,
1413                                       u32 *rem_addr,
1414                                       u16 loc_port,
1415                                       u32 *loc_addr,
1416                                       bool add_refcnt)
1417 {
1418         struct list_head *hte;
1419         struct i40iw_cm_node *cm_node;
1420         unsigned long flags;
1421
1422         hte = &cm_core->connected_nodes;
1423
1424         /* walk list and find cm_node associated with this session ID */
1425         spin_lock_irqsave(&cm_core->ht_lock, flags);
1426         list_for_each_entry(cm_node, hte, list) {
1427                 if (!memcmp(cm_node->loc_addr, loc_addr, sizeof(cm_node->loc_addr)) &&
1428                     (cm_node->loc_port == loc_port) &&
1429                     !memcmp(cm_node->rem_addr, rem_addr, sizeof(cm_node->rem_addr)) &&
1430                     (cm_node->rem_port == rem_port)) {
1431                         if (add_refcnt)
1432                                 atomic_inc(&cm_node->ref_count);
1433                         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1434                         return cm_node;
1435                 }
1436         }
1437         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1438
1439         /* no owner node */
1440         return NULL;
1441 }
1442
1443 /**
1444  * i40iw_find_listener - find a cm node listening on this addr-port pair
1445  * @cm_core: cm's core
1446  * @dst_port: listener tcp port num
1447  * @dst_addr: listener ip addr
1448  * @listener_state: state to match with listen node's
1449  */
1450 static struct i40iw_cm_listener *i40iw_find_listener(
1451                                                      struct i40iw_cm_core *cm_core,
1452                                                      u32 *dst_addr,
1453                                                      u16 dst_port,
1454                                                      u16 vlan_id,
1455                                                      enum i40iw_cm_listener_state
1456                                                      listener_state)
1457 {
1458         struct i40iw_cm_listener *listen_node;
1459         static const u32 ip_zero[4] = { 0, 0, 0, 0 };
1460         u32 listen_addr[4];
1461         u16 listen_port;
1462         unsigned long flags;
1463
1464         /* walk list and find cm_node associated with this session ID */
1465         spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1466         list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
1467                 memcpy(listen_addr, listen_node->loc_addr, sizeof(listen_addr));
1468                 listen_port = listen_node->loc_port;
1469                 /* compare node pair, return node handle if a match */
1470                 if ((!memcmp(listen_addr, dst_addr, sizeof(listen_addr)) ||
1471                      !memcmp(listen_addr, ip_zero, sizeof(listen_addr))) &&
1472                      (listen_port == dst_port) &&
1473                      (listener_state & listen_node->listener_state)) {
1474                         atomic_inc(&listen_node->ref_count);
1475                         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1476                         return listen_node;
1477                 }
1478         }
1479         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1480         return NULL;
1481 }
1482
1483 /**
1484  * i40iw_add_hte_node - add a cm node to the hash table
1485  * @cm_core: cm's core
1486  * @cm_node: connection's node
1487  */
1488 static void i40iw_add_hte_node(struct i40iw_cm_core *cm_core,
1489                                struct i40iw_cm_node *cm_node)
1490 {
1491         struct list_head *hte;
1492         unsigned long flags;
1493
1494         if (!cm_node || !cm_core) {
1495                 i40iw_pr_err("cm_node or cm_core == NULL\n");
1496                 return;
1497         }
1498         spin_lock_irqsave(&cm_core->ht_lock, flags);
1499
1500         /* get a handle on the hash table element (list head for this slot) */
1501         hte = &cm_core->connected_nodes;
1502         list_add_tail(&cm_node->list, hte);
1503         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1504 }
1505
1506 /**
1507  * listen_port_in_use - determine if port is in use
1508  * @port: Listen port number
1509  */
1510 static bool i40iw_listen_port_in_use(struct i40iw_cm_core *cm_core, u16 port)
1511 {
1512         struct i40iw_cm_listener *listen_node;
1513         unsigned long flags;
1514         bool ret = false;
1515
1516         spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1517         list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
1518                 if (listen_node->loc_port == port) {
1519                         ret = true;
1520                         break;
1521                 }
1522         }
1523         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1524         return ret;
1525 }
1526
1527 /**
1528  * i40iw_del_multiple_qhash - Remove qhash and child listens
1529  * @iwdev: iWarp device
1530  * @cm_info: CM info for parent listen node
1531  * @cm_parent_listen_node: The parent listen node
1532  */
1533 static enum i40iw_status_code i40iw_del_multiple_qhash(
1534                                                        struct i40iw_device *iwdev,
1535                                                        struct i40iw_cm_info *cm_info,
1536                                                        struct i40iw_cm_listener *cm_parent_listen_node)
1537 {
1538         struct i40iw_cm_listener *child_listen_node;
1539         enum i40iw_status_code ret = I40IW_ERR_CONFIG;
1540         struct list_head *pos, *tpos;
1541         unsigned long flags;
1542
1543         spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1544         list_for_each_safe(pos, tpos, &cm_parent_listen_node->child_listen_list) {
1545                 child_listen_node = list_entry(pos, struct i40iw_cm_listener, child_listen_list);
1546                 if (child_listen_node->ipv4)
1547                         i40iw_debug(&iwdev->sc_dev,
1548                                     I40IW_DEBUG_CM,
1549                                     "removing child listen for IP=%pI4, port=%d, vlan=%d\n",
1550                                     child_listen_node->loc_addr,
1551                                     child_listen_node->loc_port,
1552                                     child_listen_node->vlan_id);
1553                 else
1554                         i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM,
1555                                     "removing child listen for IP=%pI6, port=%d, vlan=%d\n",
1556                                     child_listen_node->loc_addr,
1557                                     child_listen_node->loc_port,
1558                                     child_listen_node->vlan_id);
1559                 list_del(pos);
1560                 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1561                        sizeof(cm_info->loc_addr));
1562                 cm_info->vlan_id = child_listen_node->vlan_id;
1563                 if (child_listen_node->qhash_set) {
1564                         ret = i40iw_manage_qhash(iwdev, cm_info,
1565                                                  I40IW_QHASH_TYPE_TCP_SYN,
1566                                                  I40IW_QHASH_MANAGE_TYPE_DELETE,
1567                                                  NULL, false);
1568                         child_listen_node->qhash_set = false;
1569                 } else {
1570                         ret = I40IW_SUCCESS;
1571                 }
1572                 i40iw_debug(&iwdev->sc_dev,
1573                             I40IW_DEBUG_CM,
1574                             "freed pointer = %p\n",
1575                             child_listen_node);
1576                 kfree(child_listen_node);
1577                 cm_parent_listen_node->cm_core->stats_listen_nodes_destroyed++;
1578         }
1579         spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1580
1581         return ret;
1582 }
1583
1584 /**
1585  * i40iw_netdev_vlan_ipv6 - Gets the netdev and vlan
1586  * @addr: local IPv6 address
1587  * @vlan_id: vlan id for the given IPv6 address
1588  *
1589  * Returns the net_device of the IPv6 address and also sets the
1590  * vlan id for that address.
1591  */
1592 static struct net_device *i40iw_netdev_vlan_ipv6(u32 *addr, u16 *vlan_id)
1593 {
1594         struct net_device *ip_dev = NULL;
1595         struct in6_addr laddr6;
1596
1597         if (!IS_ENABLED(CONFIG_IPV6))
1598                 return NULL;
1599         i40iw_copy_ip_htonl(laddr6.in6_u.u6_addr32, addr);
1600         if (vlan_id)
1601                 *vlan_id = I40IW_NO_VLAN;
1602         rcu_read_lock();
1603         for_each_netdev_rcu(&init_net, ip_dev) {
1604                 if (ipv6_chk_addr(&init_net, &laddr6, ip_dev, 1)) {
1605                         if (vlan_id)
1606                                 *vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1607                         break;
1608                 }
1609         }
1610         rcu_read_unlock();
1611         return ip_dev;
1612 }
1613
1614 /**
1615  * i40iw_get_vlan_ipv4 - Returns the vlan_id for IPv4 address
1616  * @addr: local IPv4 address
1617  */
1618 static u16 i40iw_get_vlan_ipv4(u32 *addr)
1619 {
1620         struct net_device *netdev;
1621         u16 vlan_id = I40IW_NO_VLAN;
1622
1623         netdev = ip_dev_find(&init_net, htonl(addr[0]));
1624         if (netdev) {
1625                 vlan_id = rdma_vlan_dev_vlan_id(netdev);
1626                 dev_put(netdev);
1627         }
1628         return vlan_id;
1629 }
1630
1631 /**
1632  * i40iw_add_mqh_6 - Adds multiple qhashes for IPv6
1633  * @iwdev: iWarp device
1634  * @cm_info: CM info for parent listen node
1635  * @cm_parent_listen_node: The parent listen node
1636  *
1637  * Adds a qhash and a child listen node for every IPv6 address
1638  * on the adapter and adds the associated qhash filter
1639  */
1640 static enum i40iw_status_code i40iw_add_mqh_6(struct i40iw_device *iwdev,
1641                                               struct i40iw_cm_info *cm_info,
1642                                               struct i40iw_cm_listener *cm_parent_listen_node)
1643 {
1644         struct net_device *ip_dev;
1645         struct inet6_dev *idev;
1646         struct inet6_ifaddr *ifp, *tmp;
1647         enum i40iw_status_code ret = 0;
1648         struct i40iw_cm_listener *child_listen_node;
1649         unsigned long flags;
1650
1651         rtnl_lock();
1652         for_each_netdev_rcu(&init_net, ip_dev) {
1653                 if ((((rdma_vlan_dev_vlan_id(ip_dev) < I40IW_NO_VLAN) &&
1654                       (rdma_vlan_dev_real_dev(ip_dev) == iwdev->netdev)) ||
1655                      (ip_dev == iwdev->netdev)) && (ip_dev->flags & IFF_UP)) {
1656                         idev = __in6_dev_get(ip_dev);
1657                         if (!idev) {
1658                                 i40iw_pr_err("idev == NULL\n");
1659                                 break;
1660                         }
1661                         list_for_each_entry_safe(ifp, tmp, &idev->addr_list, if_list) {
1662                                 i40iw_debug(&iwdev->sc_dev,
1663                                             I40IW_DEBUG_CM,
1664                                             "IP=%pI6, vlan_id=%d, MAC=%pM\n",
1665                                             &ifp->addr,
1666                                             rdma_vlan_dev_vlan_id(ip_dev),
1667                                             ip_dev->dev_addr);
1668                                 child_listen_node =
1669                                         kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
1670                                 i40iw_debug(&iwdev->sc_dev,
1671                                             I40IW_DEBUG_CM,
1672                                             "Allocating child listener %p\n",
1673                                             child_listen_node);
1674                                 if (!child_listen_node) {
1675                                         ret = I40IW_ERR_NO_MEMORY;
1676                                         goto exit;
1677                                 }
1678                                 cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1679                                 cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1680
1681                                 memcpy(child_listen_node, cm_parent_listen_node,
1682                                        sizeof(*child_listen_node));
1683
1684                                 i40iw_copy_ip_ntohl(child_listen_node->loc_addr,
1685                                                     ifp->addr.in6_u.u6_addr32);
1686                                 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1687                                        sizeof(cm_info->loc_addr));
1688
1689                                 ret = i40iw_manage_qhash(iwdev, cm_info,
1690                                                          I40IW_QHASH_TYPE_TCP_SYN,
1691                                                          I40IW_QHASH_MANAGE_TYPE_ADD,
1692                                                          NULL, true);
1693                                 if (!ret) {
1694                                         child_listen_node->qhash_set = true;
1695                                         spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1696                                         list_add(&child_listen_node->child_listen_list,
1697                                                  &cm_parent_listen_node->child_listen_list);
1698                                         spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1699                                         cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
1700                                 } else {
1701                                         kfree(child_listen_node);
1702                                 }
1703                         }
1704                 }
1705         }
1706 exit:
1707         rtnl_unlock();
1708         return ret;
1709 }
1710
1711 /**
1712  * i40iw_add_mqh_4 - Adds multiple qhashes for IPv4
1713  * @iwdev: iWarp device
1714  * @cm_info: CM info for parent listen node
1715  * @cm_parent_listen_node: The parent listen node
1716  *
1717  * Adds a qhash and a child listen node for every IPv4 address
1718  * on the adapter and adds the associated qhash filter
1719  */
1720 static enum i40iw_status_code i40iw_add_mqh_4(
1721                                 struct i40iw_device *iwdev,
1722                                 struct i40iw_cm_info *cm_info,
1723                                 struct i40iw_cm_listener *cm_parent_listen_node)
1724 {
1725         struct net_device *dev;
1726         struct in_device *idev;
1727         struct i40iw_cm_listener *child_listen_node;
1728         enum i40iw_status_code ret = 0;
1729         unsigned long flags;
1730
1731         rtnl_lock();
1732         for_each_netdev(&init_net, dev) {
1733                 if ((((rdma_vlan_dev_vlan_id(dev) < I40IW_NO_VLAN) &&
1734                       (rdma_vlan_dev_real_dev(dev) == iwdev->netdev)) ||
1735                     (dev == iwdev->netdev)) && (dev->flags & IFF_UP)) {
1736                         idev = in_dev_get(dev);
1737                         for_ifa(idev) {
1738                                 i40iw_debug(&iwdev->sc_dev,
1739                                             I40IW_DEBUG_CM,
1740                                             "Allocating child CM Listener forIP=%pI4, vlan_id=%d, MAC=%pM\n",
1741                                             &ifa->ifa_address,
1742                                             rdma_vlan_dev_vlan_id(dev),
1743                                             dev->dev_addr);
1744                                 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
1745                                 cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
1746                                 i40iw_debug(&iwdev->sc_dev,
1747                                             I40IW_DEBUG_CM,
1748                                             "Allocating child listener %p\n",
1749                                             child_listen_node);
1750                                 if (!child_listen_node) {
1751                                         in_dev_put(idev);
1752                                         ret = I40IW_ERR_NO_MEMORY;
1753                                         goto exit;
1754                                 }
1755                                 cm_info->vlan_id = rdma_vlan_dev_vlan_id(dev);
1756                                 cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1757                                 memcpy(child_listen_node,
1758                                        cm_parent_listen_node,
1759                                        sizeof(*child_listen_node));
1760
1761                                 child_listen_node->loc_addr[0] = ntohl(ifa->ifa_address);
1762                                 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1763                                        sizeof(cm_info->loc_addr));
1764
1765                                 ret = i40iw_manage_qhash(iwdev,
1766                                                          cm_info,
1767                                                          I40IW_QHASH_TYPE_TCP_SYN,
1768                                                          I40IW_QHASH_MANAGE_TYPE_ADD,
1769                                                          NULL,
1770                                                          true);
1771                                 if (!ret) {
1772                                         child_listen_node->qhash_set = true;
1773                                         spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1774                                         list_add(&child_listen_node->child_listen_list,
1775                                                  &cm_parent_listen_node->child_listen_list);
1776                                         spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1777                                 } else {
1778                                         kfree(child_listen_node);
1779                                         cm_parent_listen_node->cm_core->stats_listen_nodes_created--;
1780                                 }
1781                         }
1782                         endfor_ifa(idev);
1783                         in_dev_put(idev);
1784                 }
1785         }
1786 exit:
1787         rtnl_unlock();
1788         return ret;
1789 }
1790
1791 /**
1792  * i40iw_dec_refcnt_listen - delete listener and associated cm nodes
1793  * @cm_core: cm's core
1794  * @free_hanging_nodes: to free associated cm_nodes
1795  * @apbvt_del: flag to delete the apbvt
1796  */
1797 static int i40iw_dec_refcnt_listen(struct i40iw_cm_core *cm_core,
1798                                    struct i40iw_cm_listener *listener,
1799                                    int free_hanging_nodes, bool apbvt_del)
1800 {
1801         int ret = -EINVAL;
1802         int err = 0;
1803         struct list_head *list_pos;
1804         struct list_head *list_temp;
1805         struct i40iw_cm_node *cm_node;
1806         struct list_head reset_list;
1807         struct i40iw_cm_info nfo;
1808         struct i40iw_cm_node *loopback;
1809         enum i40iw_cm_node_state old_state;
1810         unsigned long flags;
1811
1812         /* free non-accelerated child nodes for this listener */
1813         INIT_LIST_HEAD(&reset_list);
1814         if (free_hanging_nodes) {
1815                 spin_lock_irqsave(&cm_core->ht_lock, flags);
1816                 list_for_each_safe(list_pos, list_temp, &cm_core->connected_nodes) {
1817                         cm_node = container_of(list_pos, struct i40iw_cm_node, list);
1818                         if ((cm_node->listener == listener) && !cm_node->accelerated) {
1819                                 atomic_inc(&cm_node->ref_count);
1820                                 list_add(&cm_node->reset_entry, &reset_list);
1821                         }
1822                 }
1823                 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1824         }
1825
1826         list_for_each_safe(list_pos, list_temp, &reset_list) {
1827                 cm_node = container_of(list_pos, struct i40iw_cm_node, reset_entry);
1828                 loopback = cm_node->loopbackpartner;
1829                 if (cm_node->state >= I40IW_CM_STATE_FIN_WAIT1) {
1830                         i40iw_rem_ref_cm_node(cm_node);
1831                 } else {
1832                         if (!loopback) {
1833                                 i40iw_cleanup_retrans_entry(cm_node);
1834                                 err = i40iw_send_reset(cm_node);
1835                                 if (err) {
1836                                         cm_node->state = I40IW_CM_STATE_CLOSED;
1837                                         i40iw_pr_err("send reset\n");
1838                                 } else {
1839                                         old_state = cm_node->state;
1840                                         cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED;
1841                                         if (old_state != I40IW_CM_STATE_MPAREQ_RCVD)
1842                                                 i40iw_rem_ref_cm_node(cm_node);
1843                                 }
1844                         } else {
1845                                 struct i40iw_cm_event event;
1846
1847                                 event.cm_node = loopback;
1848                                 memcpy(event.cm_info.rem_addr,
1849                                        loopback->rem_addr, sizeof(event.cm_info.rem_addr));
1850                                 memcpy(event.cm_info.loc_addr,
1851                                        loopback->loc_addr, sizeof(event.cm_info.loc_addr));
1852                                 event.cm_info.rem_port = loopback->rem_port;
1853                                 event.cm_info.loc_port = loopback->loc_port;
1854                                 event.cm_info.cm_id = loopback->cm_id;
1855                                 event.cm_info.ipv4 = loopback->ipv4;
1856                                 atomic_inc(&loopback->ref_count);
1857                                 loopback->state = I40IW_CM_STATE_CLOSED;
1858                                 i40iw_event_connect_error(&event);
1859                                 cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED;
1860                                 i40iw_rem_ref_cm_node(cm_node);
1861                         }
1862                 }
1863         }
1864
1865         if (!atomic_dec_return(&listener->ref_count)) {
1866                 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1867                 list_del(&listener->list);
1868                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1869
1870                 if (listener->iwdev) {
1871                         if (apbvt_del && !i40iw_listen_port_in_use(cm_core, listener->loc_port))
1872                                 i40iw_manage_apbvt(listener->iwdev,
1873                                                    listener->loc_port,
1874                                                    I40IW_MANAGE_APBVT_DEL);
1875
1876                         memcpy(nfo.loc_addr, listener->loc_addr, sizeof(nfo.loc_addr));
1877                         nfo.loc_port = listener->loc_port;
1878                         nfo.ipv4 = listener->ipv4;
1879                         nfo.vlan_id = listener->vlan_id;
1880                         nfo.user_pri = listener->user_pri;
1881
1882                         if (!list_empty(&listener->child_listen_list)) {
1883                                 i40iw_del_multiple_qhash(listener->iwdev, &nfo, listener);
1884                         } else {
1885                                 if (listener->qhash_set)
1886                                         i40iw_manage_qhash(listener->iwdev,
1887                                                            &nfo,
1888                                                            I40IW_QHASH_TYPE_TCP_SYN,
1889                                                            I40IW_QHASH_MANAGE_TYPE_DELETE,
1890                                                            NULL,
1891                                                            false);
1892                         }
1893                 }
1894
1895                 cm_core->stats_listen_destroyed++;
1896                 kfree(listener);
1897                 cm_core->stats_listen_nodes_destroyed++;
1898                 listener = NULL;
1899                 ret = 0;
1900         }
1901
1902         if (listener) {
1903                 if (atomic_read(&listener->pend_accepts_cnt) > 0)
1904                         i40iw_debug(cm_core->dev,
1905                                     I40IW_DEBUG_CM,
1906                                     "%s: listener (%p) pending accepts=%u\n",
1907                                     __func__,
1908                                     listener,
1909                                     atomic_read(&listener->pend_accepts_cnt));
1910         }
1911
1912         return ret;
1913 }
1914
1915 /**
1916  * i40iw_cm_del_listen - delete a linstener
1917  * @cm_core: cm's core
1918   * @listener: passive connection's listener
1919  * @apbvt_del: flag to delete apbvt
1920  */
1921 static int i40iw_cm_del_listen(struct i40iw_cm_core *cm_core,
1922                                struct i40iw_cm_listener *listener,
1923                                bool apbvt_del)
1924 {
1925         listener->listener_state = I40IW_CM_LISTENER_PASSIVE_STATE;
1926         listener->cm_id = NULL; /* going to be destroyed pretty soon */
1927         return i40iw_dec_refcnt_listen(cm_core, listener, 1, apbvt_del);
1928 }
1929
1930 /**
1931  * i40iw_addr_resolve_neigh - resolve neighbor address
1932  * @iwdev: iwarp device structure
1933  * @src_ip: local ip address
1934  * @dst_ip: remote ip address
1935  * @arpindex: if there is an arp entry
1936  */
1937 static int i40iw_addr_resolve_neigh(struct i40iw_device *iwdev,
1938                                     u32 src_ip,
1939                                     u32 dst_ip,
1940                                     int arpindex)
1941 {
1942         struct rtable *rt;
1943         struct neighbour *neigh;
1944         int rc = arpindex;
1945         struct net_device *netdev = iwdev->netdev;
1946         __be32 dst_ipaddr = htonl(dst_ip);
1947         __be32 src_ipaddr = htonl(src_ip);
1948
1949         rt = ip_route_output(&init_net, dst_ipaddr, src_ipaddr, 0, 0);
1950         if (IS_ERR(rt)) {
1951                 i40iw_pr_err("ip_route_output\n");
1952                 return rc;
1953         }
1954
1955         if (netif_is_bond_slave(netdev))
1956                 netdev = netdev_master_upper_dev_get(netdev);
1957
1958         neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr);
1959
1960         rcu_read_lock();
1961         if (neigh) {
1962                 if (neigh->nud_state & NUD_VALID) {
1963                         if (arpindex >= 0) {
1964                                 if (ether_addr_equal(iwdev->arp_table[arpindex].mac_addr,
1965                                                      neigh->ha))
1966                                         /* Mac address same as arp table */
1967                                         goto resolve_neigh_exit;
1968                                 i40iw_manage_arp_cache(iwdev,
1969                                                        iwdev->arp_table[arpindex].mac_addr,
1970                                                        &dst_ip,
1971                                                        true,
1972                                                        I40IW_ARP_DELETE);
1973                         }
1974
1975                         i40iw_manage_arp_cache(iwdev, neigh->ha, &dst_ip, true, I40IW_ARP_ADD);
1976                         rc = i40iw_arp_table(iwdev, &dst_ip, true, NULL, I40IW_ARP_RESOLVE);
1977                 } else {
1978                         neigh_event_send(neigh, NULL);
1979                 }
1980         }
1981  resolve_neigh_exit:
1982
1983         rcu_read_unlock();
1984         if (neigh)
1985                 neigh_release(neigh);
1986
1987         ip_rt_put(rt);
1988         return rc;
1989 }
1990
1991 /**
1992  * i40iw_get_dst_ipv6
1993  */
1994 static struct dst_entry *i40iw_get_dst_ipv6(struct sockaddr_in6 *src_addr,
1995                                             struct sockaddr_in6 *dst_addr)
1996 {
1997         struct dst_entry *dst;
1998         struct flowi6 fl6;
1999
2000         memset(&fl6, 0, sizeof(fl6));
2001         fl6.daddr = dst_addr->sin6_addr;
2002         fl6.saddr = src_addr->sin6_addr;
2003         if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
2004                 fl6.flowi6_oif = dst_addr->sin6_scope_id;
2005
2006         dst = ip6_route_output(&init_net, NULL, &fl6);
2007         return dst;
2008 }
2009
2010 /**
2011  * i40iw_addr_resolve_neigh_ipv6 - resolve neighbor ipv6 address
2012  * @iwdev: iwarp device structure
2013  * @dst_ip: remote ip address
2014  * @arpindex: if there is an arp entry
2015  */
2016 static int i40iw_addr_resolve_neigh_ipv6(struct i40iw_device *iwdev,
2017                                          u32 *src,
2018                                          u32 *dest,
2019                                          int arpindex)
2020 {
2021         struct neighbour *neigh;
2022         int rc = arpindex;
2023         struct net_device *netdev = iwdev->netdev;
2024         struct dst_entry *dst;
2025         struct sockaddr_in6 dst_addr;
2026         struct sockaddr_in6 src_addr;
2027
2028         memset(&dst_addr, 0, sizeof(dst_addr));
2029         dst_addr.sin6_family = AF_INET6;
2030         i40iw_copy_ip_htonl(dst_addr.sin6_addr.in6_u.u6_addr32, dest);
2031         memset(&src_addr, 0, sizeof(src_addr));
2032         src_addr.sin6_family = AF_INET6;
2033         i40iw_copy_ip_htonl(src_addr.sin6_addr.in6_u.u6_addr32, src);
2034         dst = i40iw_get_dst_ipv6(&src_addr, &dst_addr);
2035         if (!dst || dst->error) {
2036                 if (dst) {
2037                         dst_release(dst);
2038                         i40iw_pr_err("ip6_route_output returned dst->error = %d\n",
2039                                      dst->error);
2040                 }
2041                 return rc;
2042         }
2043
2044         if (netif_is_bond_slave(netdev))
2045                 netdev = netdev_master_upper_dev_get(netdev);
2046
2047         neigh = dst_neigh_lookup(dst, &dst_addr);
2048
2049         rcu_read_lock();
2050         if (neigh) {
2051                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "dst_neigh_lookup MAC=%pM\n", neigh->ha);
2052                 if (neigh->nud_state & NUD_VALID) {
2053                         if (arpindex >= 0) {
2054                                 if (ether_addr_equal
2055                                     (iwdev->arp_table[arpindex].mac_addr,
2056                                      neigh->ha)) {
2057                                         /* Mac address same as in arp table */
2058                                         goto resolve_neigh_exit6;
2059                                 }
2060                                 i40iw_manage_arp_cache(iwdev,
2061                                                        iwdev->arp_table[arpindex].mac_addr,
2062                                                        dest,
2063                                                        false,
2064                                                        I40IW_ARP_DELETE);
2065                         }
2066                         i40iw_manage_arp_cache(iwdev,
2067                                                neigh->ha,
2068                                                dest,
2069                                                false,
2070                                                I40IW_ARP_ADD);
2071                         rc = i40iw_arp_table(iwdev,
2072                                              dest,
2073                                              false,
2074                                              NULL,
2075                                              I40IW_ARP_RESOLVE);
2076                 } else {
2077                         neigh_event_send(neigh, NULL);
2078                 }
2079         }
2080
2081  resolve_neigh_exit6:
2082         rcu_read_unlock();
2083         if (neigh)
2084                 neigh_release(neigh);
2085         dst_release(dst);
2086         return rc;
2087 }
2088
2089 /**
2090  * i40iw_ipv4_is_loopback - check if loopback
2091  * @loc_addr: local addr to compare
2092  * @rem_addr: remote address
2093  */
2094 static bool i40iw_ipv4_is_loopback(u32 loc_addr, u32 rem_addr)
2095 {
2096         return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr);
2097 }
2098
2099 /**
2100  * i40iw_ipv6_is_loopback - check if loopback
2101  * @loc_addr: local addr to compare
2102  * @rem_addr: remote address
2103  */
2104 static bool i40iw_ipv6_is_loopback(u32 *loc_addr, u32 *rem_addr)
2105 {
2106         struct in6_addr raddr6;
2107
2108         i40iw_copy_ip_htonl(raddr6.in6_u.u6_addr32, rem_addr);
2109         return !memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6);
2110 }
2111
2112 /**
2113  * i40iw_make_cm_node - create a new instance of a cm node
2114  * @cm_core: cm's core
2115  * @iwdev: iwarp device structure
2116  * @cm_info: quad info for connection
2117  * @listener: passive connection's listener
2118  */
2119 static struct i40iw_cm_node *i40iw_make_cm_node(
2120                                    struct i40iw_cm_core *cm_core,
2121                                    struct i40iw_device *iwdev,
2122                                    struct i40iw_cm_info *cm_info,
2123                                    struct i40iw_cm_listener *listener)
2124 {
2125         struct i40iw_cm_node *cm_node;
2126         struct timespec ts;
2127         int oldarpindex;
2128         int arpindex;
2129         struct net_device *netdev = iwdev->netdev;
2130
2131         /* create an hte and cm_node for this instance */
2132         cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
2133         if (!cm_node)
2134                 return NULL;
2135
2136         /* set our node specific transport info */
2137         cm_node->ipv4 = cm_info->ipv4;
2138         cm_node->vlan_id = cm_info->vlan_id;
2139         if ((cm_node->vlan_id == I40IW_NO_VLAN) && iwdev->dcb)
2140                 cm_node->vlan_id = 0;
2141         cm_node->tos = cm_info->tos;
2142         cm_node->user_pri = cm_info->user_pri;
2143         if (listener) {
2144                 if (listener->tos != cm_info->tos)
2145                         i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB,
2146                                     "application TOS[%d] and remote client TOS[%d] mismatch\n",
2147                                      listener->tos, cm_info->tos);
2148                 cm_node->tos = max(listener->tos, cm_info->tos);
2149                 cm_node->user_pri = rt_tos2priority(cm_node->tos);
2150                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB, "listener: TOS:[%d] UP:[%d]\n",
2151                             cm_node->tos, cm_node->user_pri);
2152         }
2153         memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr));
2154         memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr));
2155         cm_node->loc_port = cm_info->loc_port;
2156         cm_node->rem_port = cm_info->rem_port;
2157
2158         cm_node->mpa_frame_rev = iwdev->mpa_version;
2159         cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
2160         cm_node->ird_size = I40IW_MAX_IRD_SIZE;
2161         cm_node->ord_size = I40IW_MAX_ORD_SIZE;
2162
2163         cm_node->listener = listener;
2164         cm_node->cm_id = cm_info->cm_id;
2165         ether_addr_copy(cm_node->loc_mac, netdev->dev_addr);
2166         spin_lock_init(&cm_node->retrans_list_lock);
2167
2168         atomic_set(&cm_node->ref_count, 1);
2169         /* associate our parent CM core */
2170         cm_node->cm_core = cm_core;
2171         cm_node->tcp_cntxt.loc_id = I40IW_CM_DEF_LOCAL_ID;
2172         cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE;
2173         cm_node->tcp_cntxt.rcv_wnd =
2174                         I40IW_CM_DEFAULT_RCV_WND_SCALED >> I40IW_CM_DEFAULT_RCV_WND_SCALE;
2175         ts = current_kernel_time();
2176         cm_node->tcp_cntxt.loc_seq_num = ts.tv_nsec;
2177         cm_node->tcp_cntxt.mss = iwdev->vsi.mss;
2178
2179         cm_node->iwdev = iwdev;
2180         cm_node->dev = &iwdev->sc_dev;
2181
2182         if ((cm_node->ipv4 &&
2183              i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
2184              (!cm_node->ipv4 && i40iw_ipv6_is_loopback(cm_node->loc_addr,
2185                                                        cm_node->rem_addr))) {
2186                 arpindex = i40iw_arp_table(iwdev,
2187                                            cm_node->rem_addr,
2188                                            false,
2189                                            NULL,
2190                                            I40IW_ARP_RESOLVE);
2191         } else {
2192                 oldarpindex = i40iw_arp_table(iwdev,
2193                                               cm_node->rem_addr,
2194                                               false,
2195                                               NULL,
2196                                               I40IW_ARP_RESOLVE);
2197                 if (cm_node->ipv4)
2198                         arpindex = i40iw_addr_resolve_neigh(iwdev,
2199                                                             cm_info->loc_addr[0],
2200                                                             cm_info->rem_addr[0],
2201                                                             oldarpindex);
2202                 else if (IS_ENABLED(CONFIG_IPV6))
2203                         arpindex = i40iw_addr_resolve_neigh_ipv6(iwdev,
2204                                                                  cm_info->loc_addr,
2205                                                                  cm_info->rem_addr,
2206                                                                  oldarpindex);
2207                 else
2208                         arpindex = -EINVAL;
2209         }
2210         if (arpindex < 0) {
2211                 i40iw_pr_err("cm_node arpindex\n");
2212                 kfree(cm_node);
2213                 return NULL;
2214         }
2215         ether_addr_copy(cm_node->rem_mac, iwdev->arp_table[arpindex].mac_addr);
2216         i40iw_add_hte_node(cm_core, cm_node);
2217         cm_core->stats_nodes_created++;
2218         return cm_node;
2219 }
2220
2221 /**
2222  * i40iw_rem_ref_cm_node - destroy an instance of a cm node
2223  * @cm_node: connection's node
2224  */
2225 static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *cm_node)
2226 {
2227         struct i40iw_cm_core *cm_core = cm_node->cm_core;
2228         struct i40iw_qp *iwqp;
2229         struct i40iw_cm_info nfo;
2230         unsigned long flags;
2231
2232         spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
2233         if (atomic_dec_return(&cm_node->ref_count)) {
2234                 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
2235                 return;
2236         }
2237         list_del(&cm_node->list);
2238         spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
2239
2240         /* if the node is destroyed before connection was accelerated */
2241         if (!cm_node->accelerated && cm_node->accept_pend) {
2242                 pr_err("node destroyed before established\n");
2243                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
2244         }
2245         if (cm_node->close_entry)
2246                 i40iw_handle_close_entry(cm_node, 0);
2247         if (cm_node->listener) {
2248                 i40iw_dec_refcnt_listen(cm_core, cm_node->listener, 0, true);
2249         } else {
2250                 if (!i40iw_listen_port_in_use(cm_core, cm_node->loc_port) &&
2251                     cm_node->apbvt_set) {
2252                         i40iw_manage_apbvt(cm_node->iwdev,
2253                                            cm_node->loc_port,
2254                                            I40IW_MANAGE_APBVT_DEL);
2255                         i40iw_get_addr_info(cm_node, &nfo);
2256                         if (cm_node->qhash_set) {
2257                                 i40iw_manage_qhash(cm_node->iwdev,
2258                                                    &nfo,
2259                                                    I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2260                                                    I40IW_QHASH_MANAGE_TYPE_DELETE,
2261                                                    NULL,
2262                                                    false);
2263                                 cm_node->qhash_set = 0;
2264                         }
2265                 }
2266         }
2267
2268         iwqp = cm_node->iwqp;
2269         if (iwqp) {
2270                 iwqp->cm_node = NULL;
2271                 i40iw_rem_ref(&iwqp->ibqp);
2272                 cm_node->iwqp = NULL;
2273         } else if (cm_node->qhash_set) {
2274                 i40iw_get_addr_info(cm_node, &nfo);
2275                 i40iw_manage_qhash(cm_node->iwdev,
2276                                    &nfo,
2277                                    I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2278                                    I40IW_QHASH_MANAGE_TYPE_DELETE,
2279                                    NULL,
2280                                    false);
2281                 cm_node->qhash_set = 0;
2282         }
2283
2284         cm_node->cm_core->stats_nodes_destroyed++;
2285         kfree(cm_node);
2286 }
2287
2288 /**
2289  * i40iw_handle_fin_pkt - FIN packet received
2290  * @cm_node: connection's node
2291  */
2292 static void i40iw_handle_fin_pkt(struct i40iw_cm_node *cm_node)
2293 {
2294         u32 ret;
2295
2296         switch (cm_node->state) {
2297         case I40IW_CM_STATE_SYN_RCVD:
2298         case I40IW_CM_STATE_SYN_SENT:
2299         case I40IW_CM_STATE_ESTABLISHED:
2300         case I40IW_CM_STATE_MPAREJ_RCVD:
2301                 cm_node->tcp_cntxt.rcv_nxt++;
2302                 i40iw_cleanup_retrans_entry(cm_node);
2303                 cm_node->state = I40IW_CM_STATE_LAST_ACK;
2304                 i40iw_send_fin(cm_node);
2305                 break;
2306         case I40IW_CM_STATE_MPAREQ_SENT:
2307                 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
2308                 cm_node->tcp_cntxt.rcv_nxt++;
2309                 i40iw_cleanup_retrans_entry(cm_node);
2310                 cm_node->state = I40IW_CM_STATE_CLOSED;
2311                 atomic_inc(&cm_node->ref_count);
2312                 i40iw_send_reset(cm_node);
2313                 break;
2314         case I40IW_CM_STATE_FIN_WAIT1:
2315                 cm_node->tcp_cntxt.rcv_nxt++;
2316                 i40iw_cleanup_retrans_entry(cm_node);
2317                 cm_node->state = I40IW_CM_STATE_CLOSING;
2318                 i40iw_send_ack(cm_node);
2319                 /*
2320                  * Wait for ACK as this is simultaneous close.
2321                  * After we receive ACK, do not send anything.
2322                  * Just rm the node.
2323                  */
2324                 break;
2325         case I40IW_CM_STATE_FIN_WAIT2:
2326                 cm_node->tcp_cntxt.rcv_nxt++;
2327                 i40iw_cleanup_retrans_entry(cm_node);
2328                 cm_node->state = I40IW_CM_STATE_TIME_WAIT;
2329                 i40iw_send_ack(cm_node);
2330                 ret =
2331                     i40iw_schedule_cm_timer(cm_node, NULL, I40IW_TIMER_TYPE_CLOSE, 1, 0);
2332                 if (ret)
2333                         i40iw_pr_err("node %p state = %d\n", cm_node, cm_node->state);
2334                 break;
2335         case I40IW_CM_STATE_TIME_WAIT:
2336                 cm_node->tcp_cntxt.rcv_nxt++;
2337                 i40iw_cleanup_retrans_entry(cm_node);
2338                 cm_node->state = I40IW_CM_STATE_CLOSED;
2339                 i40iw_rem_ref_cm_node(cm_node);
2340                 break;
2341         case I40IW_CM_STATE_OFFLOADED:
2342         default:
2343                 i40iw_pr_err("bad state node %p state = %d\n", cm_node, cm_node->state);
2344                 break;
2345         }
2346 }
2347
2348 /**
2349  * i40iw_handle_rst_pkt - process received RST packet
2350  * @cm_node: connection's node
2351  * @rbuf: receive buffer
2352  */
2353 static void i40iw_handle_rst_pkt(struct i40iw_cm_node *cm_node,
2354                                  struct i40iw_puda_buf *rbuf)
2355 {
2356         i40iw_cleanup_retrans_entry(cm_node);
2357         switch (cm_node->state) {
2358         case I40IW_CM_STATE_SYN_SENT:
2359         case I40IW_CM_STATE_MPAREQ_SENT:
2360                 switch (cm_node->mpa_frame_rev) {
2361                 case IETF_MPA_V2:
2362                         cm_node->mpa_frame_rev = IETF_MPA_V1;
2363                         /* send a syn and goto syn sent state */
2364                         cm_node->state = I40IW_CM_STATE_SYN_SENT;
2365                         if (i40iw_send_syn(cm_node, 0))
2366                                 i40iw_active_open_err(cm_node, false);
2367                         break;
2368                 case IETF_MPA_V1:
2369                 default:
2370                         i40iw_active_open_err(cm_node, false);
2371                         break;
2372                 }
2373                 break;
2374         case I40IW_CM_STATE_MPAREQ_RCVD:
2375                 atomic_add_return(1, &cm_node->passive_state);
2376                 break;
2377         case I40IW_CM_STATE_ESTABLISHED:
2378         case I40IW_CM_STATE_SYN_RCVD:
2379         case I40IW_CM_STATE_LISTENING:
2380                 i40iw_pr_err("Bad state state = %d\n", cm_node->state);
2381                 i40iw_passive_open_err(cm_node, false);
2382                 break;
2383         case I40IW_CM_STATE_OFFLOADED:
2384                 i40iw_active_open_err(cm_node, false);
2385                 break;
2386         case I40IW_CM_STATE_CLOSED:
2387                 break;
2388         case I40IW_CM_STATE_FIN_WAIT2:
2389         case I40IW_CM_STATE_FIN_WAIT1:
2390         case I40IW_CM_STATE_LAST_ACK:
2391                 cm_node->cm_id->rem_ref(cm_node->cm_id);
2392         case I40IW_CM_STATE_TIME_WAIT:
2393                 cm_node->state = I40IW_CM_STATE_CLOSED;
2394                 i40iw_rem_ref_cm_node(cm_node);
2395                 break;
2396         default:
2397                 break;
2398         }
2399 }
2400
2401 /**
2402  * i40iw_handle_rcv_mpa - Process a recv'd mpa buffer
2403  * @cm_node: connection's node
2404  * @rbuf: receive buffer
2405  */
2406 static void i40iw_handle_rcv_mpa(struct i40iw_cm_node *cm_node,
2407                                  struct i40iw_puda_buf *rbuf)
2408 {
2409         int ret;
2410         int datasize = rbuf->datalen;
2411         u8 *dataloc = rbuf->data;
2412
2413         enum i40iw_cm_event_type type = I40IW_CM_EVENT_UNKNOWN;
2414         u32 res_type;
2415
2416         ret = i40iw_parse_mpa(cm_node, dataloc, &res_type, datasize);
2417         if (ret) {
2418                 if (cm_node->state == I40IW_CM_STATE_MPAREQ_SENT)
2419                         i40iw_active_open_err(cm_node, true);
2420                 else
2421                         i40iw_passive_open_err(cm_node, true);
2422                 return;
2423         }
2424
2425         switch (cm_node->state) {
2426         case I40IW_CM_STATE_ESTABLISHED:
2427                 if (res_type == I40IW_MPA_REQUEST_REJECT)
2428                         i40iw_pr_err("state for reject\n");
2429                 cm_node->state = I40IW_CM_STATE_MPAREQ_RCVD;
2430                 type = I40IW_CM_EVENT_MPA_REQ;
2431                 i40iw_send_ack(cm_node);        /* ACK received MPA request */
2432                 atomic_set(&cm_node->passive_state,
2433                            I40IW_PASSIVE_STATE_INDICATED);
2434                 break;
2435         case I40IW_CM_STATE_MPAREQ_SENT:
2436                 i40iw_cleanup_retrans_entry(cm_node);
2437                 if (res_type == I40IW_MPA_REQUEST_REJECT) {
2438                         type = I40IW_CM_EVENT_MPA_REJECT;
2439                         cm_node->state = I40IW_CM_STATE_MPAREJ_RCVD;
2440                 } else {
2441                         type = I40IW_CM_EVENT_CONNECTED;
2442                         cm_node->state = I40IW_CM_STATE_OFFLOADED;
2443                 }
2444                 i40iw_send_ack(cm_node);
2445                 break;
2446         default:
2447                 pr_err("%s wrong cm_node state =%d\n", __func__, cm_node->state);
2448                 break;
2449         }
2450         i40iw_create_event(cm_node, type);
2451 }
2452
2453 /**
2454  * i40iw_indicate_pkt_err - Send up err event to cm
2455  * @cm_node: connection's node
2456  */
2457 static void i40iw_indicate_pkt_err(struct i40iw_cm_node *cm_node)
2458 {
2459         switch (cm_node->state) {
2460         case I40IW_CM_STATE_SYN_SENT:
2461         case I40IW_CM_STATE_MPAREQ_SENT:
2462                 i40iw_active_open_err(cm_node, true);
2463                 break;
2464         case I40IW_CM_STATE_ESTABLISHED:
2465         case I40IW_CM_STATE_SYN_RCVD:
2466                 i40iw_passive_open_err(cm_node, true);
2467                 break;
2468         case I40IW_CM_STATE_OFFLOADED:
2469         default:
2470                 break;
2471         }
2472 }
2473
2474 /**
2475  * i40iw_check_syn - Check for error on received syn ack
2476  * @cm_node: connection's node
2477  * @tcph: pointer tcp header
2478  */
2479 static int i40iw_check_syn(struct i40iw_cm_node *cm_node, struct tcphdr *tcph)
2480 {
2481         int err = 0;
2482
2483         if (ntohl(tcph->ack_seq) != cm_node->tcp_cntxt.loc_seq_num) {
2484                 err = 1;
2485                 i40iw_active_open_err(cm_node, true);
2486         }
2487         return err;
2488 }
2489
2490 /**
2491  * i40iw_check_seq - check seq numbers if OK
2492  * @cm_node: connection's node
2493  * @tcph: pointer tcp header
2494  */
2495 static int i40iw_check_seq(struct i40iw_cm_node *cm_node, struct tcphdr *tcph)
2496 {
2497         int err = 0;
2498         u32 seq;
2499         u32 ack_seq;
2500         u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
2501         u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
2502         u32 rcv_wnd;
2503
2504         seq = ntohl(tcph->seq);
2505         ack_seq = ntohl(tcph->ack_seq);
2506         rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
2507         if (ack_seq != loc_seq_num)
2508                 err = -1;
2509         else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
2510                 err = -1;
2511         if (err) {
2512                 i40iw_pr_err("seq number\n");
2513                 i40iw_indicate_pkt_err(cm_node);
2514         }
2515         return err;
2516 }
2517
2518 /**
2519  * i40iw_handle_syn_pkt - is for Passive node
2520  * @cm_node: connection's node
2521  * @rbuf: receive buffer
2522  */
2523 static void i40iw_handle_syn_pkt(struct i40iw_cm_node *cm_node,
2524                                  struct i40iw_puda_buf *rbuf)
2525 {
2526         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2527         int ret;
2528         u32 inc_sequence;
2529         int optionsize;
2530         struct i40iw_cm_info nfo;
2531
2532         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2533         inc_sequence = ntohl(tcph->seq);
2534
2535         switch (cm_node->state) {
2536         case I40IW_CM_STATE_SYN_SENT:
2537         case I40IW_CM_STATE_MPAREQ_SENT:
2538                 /* Rcvd syn on active open connection */
2539                 i40iw_active_open_err(cm_node, 1);
2540                 break;
2541         case I40IW_CM_STATE_LISTENING:
2542                 /* Passive OPEN */
2543                 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
2544                     cm_node->listener->backlog) {
2545                         cm_node->cm_core->stats_backlog_drops++;
2546                         i40iw_passive_open_err(cm_node, false);
2547                         break;
2548                 }
2549                 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1);
2550                 if (ret) {
2551                         i40iw_passive_open_err(cm_node, false);
2552                         /* drop pkt */
2553                         break;
2554                 }
2555                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2556                 cm_node->accept_pend = 1;
2557                 atomic_inc(&cm_node->listener->pend_accepts_cnt);
2558
2559                 cm_node->state = I40IW_CM_STATE_SYN_RCVD;
2560                 i40iw_get_addr_info(cm_node, &nfo);
2561                 ret = i40iw_manage_qhash(cm_node->iwdev,
2562                                          &nfo,
2563                                          I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2564                                          I40IW_QHASH_MANAGE_TYPE_ADD,
2565                                          (void *)cm_node,
2566                                          false);
2567                 cm_node->qhash_set = true;
2568                 break;
2569         case I40IW_CM_STATE_CLOSED:
2570                 i40iw_cleanup_retrans_entry(cm_node);
2571                 atomic_inc(&cm_node->ref_count);
2572                 i40iw_send_reset(cm_node);
2573                 break;
2574         case I40IW_CM_STATE_OFFLOADED:
2575         case I40IW_CM_STATE_ESTABLISHED:
2576         case I40IW_CM_STATE_FIN_WAIT1:
2577         case I40IW_CM_STATE_FIN_WAIT2:
2578         case I40IW_CM_STATE_MPAREQ_RCVD:
2579         case I40IW_CM_STATE_LAST_ACK:
2580         case I40IW_CM_STATE_CLOSING:
2581         case I40IW_CM_STATE_UNKNOWN:
2582         default:
2583                 break;
2584         }
2585 }
2586
2587 /**
2588  * i40iw_handle_synack_pkt - Process SYN+ACK packet (active side)
2589  * @cm_node: connection's node
2590  * @rbuf: receive buffer
2591  */
2592 static void i40iw_handle_synack_pkt(struct i40iw_cm_node *cm_node,
2593                                     struct i40iw_puda_buf *rbuf)
2594 {
2595         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2596         int ret;
2597         u32 inc_sequence;
2598         int optionsize;
2599
2600         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2601         inc_sequence = ntohl(tcph->seq);
2602         switch (cm_node->state) {
2603         case I40IW_CM_STATE_SYN_SENT:
2604                 i40iw_cleanup_retrans_entry(cm_node);
2605                 /* active open */
2606                 if (i40iw_check_syn(cm_node, tcph)) {
2607                         i40iw_pr_err("check syn fail\n");
2608                         return;
2609                 }
2610                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2611                 /* setup options */
2612                 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 0);
2613                 if (ret) {
2614                         i40iw_debug(cm_node->dev,
2615                                     I40IW_DEBUG_CM,
2616                                     "cm_node=%p tcp_options failed\n",
2617                                     cm_node);
2618                         break;
2619                 }
2620                 i40iw_cleanup_retrans_entry(cm_node);
2621                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2622                 i40iw_send_ack(cm_node);        /* ACK  for the syn_ack */
2623                 ret = i40iw_send_mpa_request(cm_node);
2624                 if (ret) {
2625                         i40iw_debug(cm_node->dev,
2626                                     I40IW_DEBUG_CM,
2627                                     "cm_node=%p i40iw_send_mpa_request failed\n",
2628                                     cm_node);
2629                         break;
2630                 }
2631                 cm_node->state = I40IW_CM_STATE_MPAREQ_SENT;
2632                 break;
2633         case I40IW_CM_STATE_MPAREQ_RCVD:
2634                 i40iw_passive_open_err(cm_node, true);
2635                 break;
2636         case I40IW_CM_STATE_LISTENING:
2637                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2638                 i40iw_cleanup_retrans_entry(cm_node);
2639                 cm_node->state = I40IW_CM_STATE_CLOSED;
2640                 i40iw_send_reset(cm_node);
2641                 break;
2642         case I40IW_CM_STATE_CLOSED:
2643                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2644                 i40iw_cleanup_retrans_entry(cm_node);
2645                 atomic_inc(&cm_node->ref_count);
2646                 i40iw_send_reset(cm_node);
2647                 break;
2648         case I40IW_CM_STATE_ESTABLISHED:
2649         case I40IW_CM_STATE_FIN_WAIT1:
2650         case I40IW_CM_STATE_FIN_WAIT2:
2651         case I40IW_CM_STATE_LAST_ACK:
2652         case I40IW_CM_STATE_OFFLOADED:
2653         case I40IW_CM_STATE_CLOSING:
2654         case I40IW_CM_STATE_UNKNOWN:
2655         case I40IW_CM_STATE_MPAREQ_SENT:
2656         default:
2657                 break;
2658         }
2659 }
2660
2661 /**
2662  * i40iw_handle_ack_pkt - process packet with ACK
2663  * @cm_node: connection's node
2664  * @rbuf: receive buffer
2665  */
2666 static int i40iw_handle_ack_pkt(struct i40iw_cm_node *cm_node,
2667                                 struct i40iw_puda_buf *rbuf)
2668 {
2669         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2670         u32 inc_sequence;
2671         int ret = 0;
2672         int optionsize;
2673         u32 datasize = rbuf->datalen;
2674
2675         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2676
2677         if (i40iw_check_seq(cm_node, tcph))
2678                 return -EINVAL;
2679
2680         inc_sequence = ntohl(tcph->seq);
2681         switch (cm_node->state) {
2682         case I40IW_CM_STATE_SYN_RCVD:
2683                 i40iw_cleanup_retrans_entry(cm_node);
2684                 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1);
2685                 if (ret)
2686                         break;
2687                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2688                 cm_node->state = I40IW_CM_STATE_ESTABLISHED;
2689                 if (datasize) {
2690                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2691                         i40iw_handle_rcv_mpa(cm_node, rbuf);
2692                 }
2693                 break;
2694         case I40IW_CM_STATE_ESTABLISHED:
2695                 i40iw_cleanup_retrans_entry(cm_node);
2696                 if (datasize) {
2697                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2698                         i40iw_handle_rcv_mpa(cm_node, rbuf);
2699                 }
2700                 break;
2701         case I40IW_CM_STATE_MPAREQ_SENT:
2702                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2703                 if (datasize) {
2704                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2705                         i40iw_handle_rcv_mpa(cm_node, rbuf);
2706                 }
2707                 break;
2708         case I40IW_CM_STATE_LISTENING:
2709                 i40iw_cleanup_retrans_entry(cm_node);
2710                 cm_node->state = I40IW_CM_STATE_CLOSED;
2711                 i40iw_send_reset(cm_node);
2712                 break;
2713         case I40IW_CM_STATE_CLOSED:
2714                 i40iw_cleanup_retrans_entry(cm_node);
2715                 atomic_inc(&cm_node->ref_count);
2716                 i40iw_send_reset(cm_node);
2717                 break;
2718         case I40IW_CM_STATE_LAST_ACK:
2719         case I40IW_CM_STATE_CLOSING:
2720                 i40iw_cleanup_retrans_entry(cm_node);
2721                 cm_node->state = I40IW_CM_STATE_CLOSED;
2722                 if (!cm_node->accept_pend)
2723                         cm_node->cm_id->rem_ref(cm_node->cm_id);
2724                 i40iw_rem_ref_cm_node(cm_node);
2725                 break;
2726         case I40IW_CM_STATE_FIN_WAIT1:
2727                 i40iw_cleanup_retrans_entry(cm_node);
2728                 cm_node->state = I40IW_CM_STATE_FIN_WAIT2;
2729                 break;
2730         case I40IW_CM_STATE_SYN_SENT:
2731         case I40IW_CM_STATE_FIN_WAIT2:
2732         case I40IW_CM_STATE_OFFLOADED:
2733         case I40IW_CM_STATE_MPAREQ_RCVD:
2734         case I40IW_CM_STATE_UNKNOWN:
2735         default:
2736                 i40iw_cleanup_retrans_entry(cm_node);
2737                 break;
2738         }
2739         return ret;
2740 }
2741
2742 /**
2743  * i40iw_process_packet - process cm packet
2744  * @cm_node: connection's node
2745  * @rbuf: receive buffer
2746  */
2747 static void i40iw_process_packet(struct i40iw_cm_node *cm_node,
2748                                  struct i40iw_puda_buf *rbuf)
2749 {
2750         enum i40iw_tcpip_pkt_type pkt_type = I40IW_PKT_TYPE_UNKNOWN;
2751         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2752         u32 fin_set = 0;
2753         int ret;
2754
2755         if (tcph->rst) {
2756                 pkt_type = I40IW_PKT_TYPE_RST;
2757         } else if (tcph->syn) {
2758                 pkt_type = I40IW_PKT_TYPE_SYN;
2759                 if (tcph->ack)
2760                         pkt_type = I40IW_PKT_TYPE_SYNACK;
2761         } else if (tcph->ack) {
2762                 pkt_type = I40IW_PKT_TYPE_ACK;
2763         }
2764         if (tcph->fin)
2765                 fin_set = 1;
2766
2767         switch (pkt_type) {
2768         case I40IW_PKT_TYPE_SYN:
2769                 i40iw_handle_syn_pkt(cm_node, rbuf);
2770                 break;
2771         case I40IW_PKT_TYPE_SYNACK:
2772                 i40iw_handle_synack_pkt(cm_node, rbuf);
2773                 break;
2774         case I40IW_PKT_TYPE_ACK:
2775                 ret = i40iw_handle_ack_pkt(cm_node, rbuf);
2776                 if (fin_set && !ret)
2777                         i40iw_handle_fin_pkt(cm_node);
2778                 break;
2779         case I40IW_PKT_TYPE_RST:
2780                 i40iw_handle_rst_pkt(cm_node, rbuf);
2781                 break;
2782         default:
2783                 if (fin_set &&
2784                     (!i40iw_check_seq(cm_node, (struct tcphdr *)rbuf->tcph)))
2785                         i40iw_handle_fin_pkt(cm_node);
2786                 break;
2787         }
2788 }
2789
2790 /**
2791  * i40iw_make_listen_node - create a listen node with params
2792  * @cm_core: cm's core
2793  * @iwdev: iwarp device structure
2794  * @cm_info: quad info for connection
2795  */
2796 static struct i40iw_cm_listener *i40iw_make_listen_node(
2797                                         struct i40iw_cm_core *cm_core,
2798                                         struct i40iw_device *iwdev,
2799                                         struct i40iw_cm_info *cm_info)
2800 {
2801         struct i40iw_cm_listener *listener;
2802         unsigned long flags;
2803
2804         /* cannot have multiple matching listeners */
2805         listener = i40iw_find_listener(cm_core, cm_info->loc_addr,
2806                                        cm_info->loc_port,
2807                                        cm_info->vlan_id,
2808                                        I40IW_CM_LISTENER_EITHER_STATE);
2809         if (listener &&
2810             (listener->listener_state == I40IW_CM_LISTENER_ACTIVE_STATE)) {
2811                 atomic_dec(&listener->ref_count);
2812                 i40iw_debug(cm_core->dev,
2813                             I40IW_DEBUG_CM,
2814                             "Not creating listener since it already exists\n");
2815                 return NULL;
2816         }
2817
2818         if (!listener) {
2819                 /* create a CM listen node (1/2 node to compare incoming traffic to) */
2820                 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
2821                 if (!listener)
2822                         return NULL;
2823                 cm_core->stats_listen_nodes_created++;
2824                 memcpy(listener->loc_addr, cm_info->loc_addr, sizeof(listener->loc_addr));
2825                 listener->loc_port = cm_info->loc_port;
2826
2827                 INIT_LIST_HEAD(&listener->child_listen_list);
2828
2829                 atomic_set(&listener->ref_count, 1);
2830         } else {
2831                 listener->reused_node = 1;
2832         }
2833
2834         listener->cm_id = cm_info->cm_id;
2835         listener->ipv4 = cm_info->ipv4;
2836         listener->vlan_id = cm_info->vlan_id;
2837         atomic_set(&listener->pend_accepts_cnt, 0);
2838         listener->cm_core = cm_core;
2839         listener->iwdev = iwdev;
2840
2841         listener->backlog = cm_info->backlog;
2842         listener->listener_state = I40IW_CM_LISTENER_ACTIVE_STATE;
2843
2844         if (!listener->reused_node) {
2845                 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2846                 list_add(&listener->list, &cm_core->listen_nodes);
2847                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2848         }
2849
2850         return listener;
2851 }
2852
2853 /**
2854  * i40iw_create_cm_node - make a connection node with params
2855  * @cm_core: cm's core
2856  * @iwdev: iwarp device structure
2857  * @private_data_len: len to provate data for mpa request
2858  * @private_data: pointer to private data for connection
2859  * @cm_info: quad info for connection
2860  */
2861 static struct i40iw_cm_node *i40iw_create_cm_node(
2862                                         struct i40iw_cm_core *cm_core,
2863                                         struct i40iw_device *iwdev,
2864                                         u16 private_data_len,
2865                                         void *private_data,
2866                                         struct i40iw_cm_info *cm_info)
2867 {
2868         struct i40iw_cm_node *cm_node;
2869         struct i40iw_cm_listener *loopback_remotelistener;
2870         struct i40iw_cm_node *loopback_remotenode;
2871         struct i40iw_cm_info loopback_cm_info;
2872
2873         /* create a CM connection node */
2874         cm_node = i40iw_make_cm_node(cm_core, iwdev, cm_info, NULL);
2875         if (!cm_node)
2876                 return ERR_PTR(-ENOMEM);
2877         /* set our node side to client (active) side */
2878         cm_node->tcp_cntxt.client = 1;
2879         cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE;
2880
2881         if (!memcmp(cm_info->loc_addr, cm_info->rem_addr, sizeof(cm_info->loc_addr))) {
2882                 loopback_remotelistener = i40iw_find_listener(
2883                                                 cm_core,
2884                                                 cm_info->rem_addr,
2885                                                 cm_node->rem_port,
2886                                                 cm_node->vlan_id,
2887                                                 I40IW_CM_LISTENER_ACTIVE_STATE);
2888                 if (!loopback_remotelistener) {
2889                         i40iw_rem_ref_cm_node(cm_node);
2890                         return ERR_PTR(-ECONNREFUSED);
2891                 } else {
2892                         loopback_cm_info = *cm_info;
2893                         loopback_cm_info.loc_port = cm_info->rem_port;
2894                         loopback_cm_info.rem_port = cm_info->loc_port;
2895                         loopback_cm_info.cm_id = loopback_remotelistener->cm_id;
2896                         loopback_cm_info.ipv4 = cm_info->ipv4;
2897                         loopback_remotenode = i40iw_make_cm_node(cm_core,
2898                                                                  iwdev,
2899                                                                  &loopback_cm_info,
2900                                                                  loopback_remotelistener);
2901                         if (!loopback_remotenode) {
2902                                 i40iw_rem_ref_cm_node(cm_node);
2903                                 return ERR_PTR(-ENOMEM);
2904                         }
2905                         cm_core->stats_loopbacks++;
2906                         loopback_remotenode->loopbackpartner = cm_node;
2907                         loopback_remotenode->tcp_cntxt.rcv_wscale =
2908                                 I40IW_CM_DEFAULT_RCV_WND_SCALE;
2909                         cm_node->loopbackpartner = loopback_remotenode;
2910                         memcpy(loopback_remotenode->pdata_buf, private_data,
2911                                private_data_len);
2912                         loopback_remotenode->pdata.size = private_data_len;
2913
2914                         cm_node->state = I40IW_CM_STATE_OFFLOADED;
2915                         cm_node->tcp_cntxt.rcv_nxt =
2916                                 loopback_remotenode->tcp_cntxt.loc_seq_num;
2917                         loopback_remotenode->tcp_cntxt.rcv_nxt =
2918                                 cm_node->tcp_cntxt.loc_seq_num;
2919                         cm_node->tcp_cntxt.max_snd_wnd =
2920                                 loopback_remotenode->tcp_cntxt.rcv_wnd;
2921                         loopback_remotenode->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
2922                         cm_node->tcp_cntxt.snd_wnd = loopback_remotenode->tcp_cntxt.rcv_wnd;
2923                         loopback_remotenode->tcp_cntxt.snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
2924                         cm_node->tcp_cntxt.snd_wscale = loopback_remotenode->tcp_cntxt.rcv_wscale;
2925                         loopback_remotenode->tcp_cntxt.snd_wscale = cm_node->tcp_cntxt.rcv_wscale;
2926                         loopback_remotenode->state = I40IW_CM_STATE_MPAREQ_RCVD;
2927                         i40iw_create_event(loopback_remotenode, I40IW_CM_EVENT_MPA_REQ);
2928                 }
2929                 return cm_node;
2930         }
2931
2932         cm_node->pdata.size = private_data_len;
2933         cm_node->pdata.addr = cm_node->pdata_buf;
2934
2935         memcpy(cm_node->pdata_buf, private_data, private_data_len);
2936
2937         cm_node->state = I40IW_CM_STATE_SYN_SENT;
2938         return cm_node;
2939 }
2940
2941 /**
2942  * i40iw_cm_reject - reject and teardown a connection
2943  * @cm_node: connection's node
2944  * @pdate: ptr to private data for reject
2945  * @plen: size of private data
2946  */
2947 static int i40iw_cm_reject(struct i40iw_cm_node *cm_node, const void *pdata, u8 plen)
2948 {
2949         int ret = 0;
2950         int err;
2951         int passive_state;
2952         struct iw_cm_id *cm_id = cm_node->cm_id;
2953         struct i40iw_cm_node *loopback = cm_node->loopbackpartner;
2954
2955         if (cm_node->tcp_cntxt.client)
2956                 return ret;
2957         i40iw_cleanup_retrans_entry(cm_node);
2958
2959         if (!loopback) {
2960                 passive_state = atomic_add_return(1, &cm_node->passive_state);
2961                 if (passive_state == I40IW_SEND_RESET_EVENT) {
2962                         cm_node->state = I40IW_CM_STATE_CLOSED;
2963                         i40iw_rem_ref_cm_node(cm_node);
2964                 } else {
2965                         if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
2966                                 i40iw_rem_ref_cm_node(cm_node);
2967                         } else {
2968                                 ret = i40iw_send_mpa_reject(cm_node, pdata, plen);
2969                                 if (ret) {
2970                                         cm_node->state = I40IW_CM_STATE_CLOSED;
2971                                         err = i40iw_send_reset(cm_node);
2972                                         if (err)
2973                                                 i40iw_pr_err("send reset failed\n");
2974                                 } else {
2975                                         cm_id->add_ref(cm_id);
2976                                 }
2977                         }
2978                 }
2979         } else {
2980                 cm_node->cm_id = NULL;
2981                 if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
2982                         i40iw_rem_ref_cm_node(cm_node);
2983                         i40iw_rem_ref_cm_node(loopback);
2984                 } else {
2985                         ret = i40iw_send_cm_event(loopback,
2986                                                   loopback->cm_id,
2987                                                   IW_CM_EVENT_CONNECT_REPLY,
2988                                                   -ECONNREFUSED);
2989                         i40iw_rem_ref_cm_node(cm_node);
2990                         loopback->state = I40IW_CM_STATE_CLOSING;
2991
2992                         cm_id = loopback->cm_id;
2993                         i40iw_rem_ref_cm_node(loopback);
2994                         cm_id->rem_ref(cm_id);
2995                 }
2996         }
2997
2998         return ret;
2999 }
3000
3001 /**
3002  * i40iw_cm_close - close of cm connection
3003  * @cm_node: connection's node
3004  */
3005 static int i40iw_cm_close(struct i40iw_cm_node *cm_node)
3006 {
3007         int ret = 0;
3008
3009         if (!cm_node)
3010                 return -EINVAL;
3011
3012         switch (cm_node->state) {
3013         case I40IW_CM_STATE_SYN_RCVD:
3014         case I40IW_CM_STATE_SYN_SENT:
3015         case I40IW_CM_STATE_ONE_SIDE_ESTABLISHED:
3016         case I40IW_CM_STATE_ESTABLISHED:
3017         case I40IW_CM_STATE_ACCEPTING:
3018         case I40IW_CM_STATE_MPAREQ_SENT:
3019         case I40IW_CM_STATE_MPAREQ_RCVD:
3020                 i40iw_cleanup_retrans_entry(cm_node);
3021                 i40iw_send_reset(cm_node);
3022                 break;
3023         case I40IW_CM_STATE_CLOSE_WAIT:
3024                 cm_node->state = I40IW_CM_STATE_LAST_ACK;
3025                 i40iw_send_fin(cm_node);
3026                 break;
3027         case I40IW_CM_STATE_FIN_WAIT1:
3028         case I40IW_CM_STATE_FIN_WAIT2:
3029         case I40IW_CM_STATE_LAST_ACK:
3030         case I40IW_CM_STATE_TIME_WAIT:
3031         case I40IW_CM_STATE_CLOSING:
3032                 ret = -1;
3033                 break;
3034         case I40IW_CM_STATE_LISTENING:
3035                 i40iw_cleanup_retrans_entry(cm_node);
3036                 i40iw_send_reset(cm_node);
3037                 break;
3038         case I40IW_CM_STATE_MPAREJ_RCVD:
3039         case I40IW_CM_STATE_UNKNOWN:
3040         case I40IW_CM_STATE_INITED:
3041         case I40IW_CM_STATE_CLOSED:
3042         case I40IW_CM_STATE_LISTENER_DESTROYED:
3043                 i40iw_rem_ref_cm_node(cm_node);
3044                 break;
3045         case I40IW_CM_STATE_OFFLOADED:
3046                 if (cm_node->send_entry)
3047                         i40iw_pr_err("send_entry\n");
3048                 i40iw_rem_ref_cm_node(cm_node);
3049                 break;
3050         }
3051         return ret;
3052 }
3053
3054 /**
3055  * i40iw_receive_ilq - recv an ETHERNET packet, and process it
3056  * through CM
3057  * @vsi: pointer to the vsi structure
3058  * @rbuf: receive buffer
3059  */
3060 void i40iw_receive_ilq(struct i40iw_sc_vsi *vsi, struct i40iw_puda_buf *rbuf)
3061 {
3062         struct i40iw_cm_node *cm_node;
3063         struct i40iw_cm_listener *listener;
3064         struct iphdr *iph;
3065         struct ipv6hdr *ip6h;
3066         struct tcphdr *tcph;
3067         struct i40iw_cm_info cm_info;
3068         struct i40iw_sc_dev *dev = vsi->dev;
3069         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
3070         struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3071         struct vlan_ethhdr *ethh;
3072         u16 vtag;
3073
3074         /* if vlan, then maclen = 18 else 14 */
3075         iph = (struct iphdr *)rbuf->iph;
3076         memset(&cm_info, 0, sizeof(cm_info));
3077
3078         i40iw_debug_buf(dev,
3079                         I40IW_DEBUG_ILQ,
3080                         "RECEIVE ILQ BUFFER",
3081                         rbuf->mem.va,
3082                         rbuf->totallen);
3083         ethh = (struct vlan_ethhdr *)rbuf->mem.va;
3084
3085         if (ethh->h_vlan_proto == htons(ETH_P_8021Q)) {
3086                 vtag = ntohs(ethh->h_vlan_TCI);
3087                 cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
3088                 cm_info.vlan_id = vtag & VLAN_VID_MASK;
3089                 i40iw_debug(cm_core->dev,
3090                             I40IW_DEBUG_CM,
3091                             "%s vlan_id=%d\n",
3092                             __func__,
3093                             cm_info.vlan_id);
3094         } else {
3095                 cm_info.vlan_id = I40IW_NO_VLAN;
3096         }
3097         tcph = (struct tcphdr *)rbuf->tcph;
3098
3099         if (rbuf->ipv4) {
3100                 cm_info.loc_addr[0] = ntohl(iph->daddr);
3101                 cm_info.rem_addr[0] = ntohl(iph->saddr);
3102                 cm_info.ipv4 = true;
3103                 cm_info.tos = iph->tos;
3104         } else {
3105                 ip6h = (struct ipv6hdr *)rbuf->iph;
3106                 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3107                                     ip6h->daddr.in6_u.u6_addr32);
3108                 i40iw_copy_ip_ntohl(cm_info.rem_addr,
3109                                     ip6h->saddr.in6_u.u6_addr32);
3110                 cm_info.ipv4 = false;
3111                 cm_info.tos = (ip6h->priority << 4) | (ip6h->flow_lbl[0] >> 4);
3112         }
3113         cm_info.loc_port = ntohs(tcph->dest);
3114         cm_info.rem_port = ntohs(tcph->source);
3115         cm_node = i40iw_find_node(cm_core,
3116                                   cm_info.rem_port,
3117                                   cm_info.rem_addr,
3118                                   cm_info.loc_port,
3119                                   cm_info.loc_addr,
3120                                   true);
3121
3122         if (!cm_node) {
3123                 /* Only type of packet accepted are for */
3124                 /* the PASSIVE open (syn only) */
3125                 if (!tcph->syn || tcph->ack)
3126                         return;
3127                 listener =
3128                     i40iw_find_listener(cm_core,
3129                                         cm_info.loc_addr,
3130                                         cm_info.loc_port,
3131                                         cm_info.vlan_id,
3132                                         I40IW_CM_LISTENER_ACTIVE_STATE);
3133                 if (!listener) {
3134                         cm_info.cm_id = NULL;
3135                         i40iw_debug(cm_core->dev,
3136                                     I40IW_DEBUG_CM,
3137                                     "%s no listener found\n",
3138                                     __func__);
3139                         return;
3140                 }
3141                 cm_info.cm_id = listener->cm_id;
3142                 cm_node = i40iw_make_cm_node(cm_core, iwdev, &cm_info, listener);
3143                 if (!cm_node) {
3144                         i40iw_debug(cm_core->dev,
3145                                     I40IW_DEBUG_CM,
3146                                     "%s allocate node failed\n",
3147                                     __func__);
3148                         atomic_dec(&listener->ref_count);
3149                         return;
3150                 }
3151                 if (!tcph->rst && !tcph->fin) {
3152                         cm_node->state = I40IW_CM_STATE_LISTENING;
3153                 } else {
3154                         i40iw_rem_ref_cm_node(cm_node);
3155                         return;
3156                 }
3157                 atomic_inc(&cm_node->ref_count);
3158         } else if (cm_node->state == I40IW_CM_STATE_OFFLOADED) {
3159                 i40iw_rem_ref_cm_node(cm_node);
3160                 return;
3161         }
3162         i40iw_process_packet(cm_node, rbuf);
3163         i40iw_rem_ref_cm_node(cm_node);
3164 }
3165
3166 /**
3167  * i40iw_setup_cm_core - allocate a top level instance of a cm
3168  * core
3169  * @iwdev: iwarp device structure
3170  */
3171 void i40iw_setup_cm_core(struct i40iw_device *iwdev)
3172 {
3173         struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3174
3175         cm_core->iwdev = iwdev;
3176         cm_core->dev = &iwdev->sc_dev;
3177
3178         INIT_LIST_HEAD(&cm_core->connected_nodes);
3179         INIT_LIST_HEAD(&cm_core->listen_nodes);
3180
3181         setup_timer(&cm_core->tcp_timer, i40iw_cm_timer_tick,
3182                     (unsigned long)cm_core);
3183
3184         spin_lock_init(&cm_core->ht_lock);
3185         spin_lock_init(&cm_core->listen_list_lock);
3186
3187         cm_core->event_wq = alloc_ordered_workqueue("iwewq",
3188                                                     WQ_MEM_RECLAIM);
3189
3190         cm_core->disconn_wq = alloc_ordered_workqueue("iwdwq",
3191                                                       WQ_MEM_RECLAIM);
3192 }
3193
3194 /**
3195  * i40iw_cleanup_cm_core - deallocate a top level instance of a
3196  * cm core
3197  * @cm_core: cm's core
3198  */
3199 void i40iw_cleanup_cm_core(struct i40iw_cm_core *cm_core)
3200 {
3201         unsigned long flags;
3202
3203         if (!cm_core)
3204                 return;
3205
3206         spin_lock_irqsave(&cm_core->ht_lock, flags);
3207         if (timer_pending(&cm_core->tcp_timer))
3208                 del_timer_sync(&cm_core->tcp_timer);
3209         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
3210
3211         destroy_workqueue(cm_core->event_wq);
3212         destroy_workqueue(cm_core->disconn_wq);
3213 }
3214
3215 /**
3216  * i40iw_init_tcp_ctx - setup qp context
3217  * @cm_node: connection's node
3218  * @tcp_info: offload info for tcp
3219  * @iwqp: associate qp for the connection
3220  */
3221 static void i40iw_init_tcp_ctx(struct i40iw_cm_node *cm_node,
3222                                struct i40iw_tcp_offload_info *tcp_info,
3223                                struct i40iw_qp *iwqp)
3224 {
3225         tcp_info->ipv4 = cm_node->ipv4;
3226         tcp_info->drop_ooo_seg = true;
3227         tcp_info->wscale = true;
3228         tcp_info->ignore_tcp_opt = true;
3229         tcp_info->ignore_tcp_uns_opt = true;
3230         tcp_info->no_nagle = false;
3231
3232         tcp_info->ttl = I40IW_DEFAULT_TTL;
3233         tcp_info->rtt_var = cpu_to_le32(I40IW_DEFAULT_RTT_VAR);
3234         tcp_info->ss_thresh = cpu_to_le32(I40IW_DEFAULT_SS_THRESH);
3235         tcp_info->rexmit_thresh = I40IW_DEFAULT_REXMIT_THRESH;
3236
3237         tcp_info->tcp_state = I40IW_TCP_STATE_ESTABLISHED;
3238         tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale;
3239         tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale;
3240
3241         tcp_info->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3242         tcp_info->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
3243         tcp_info->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
3244         tcp_info->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3245
3246         tcp_info->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3247         tcp_info->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss);
3248         tcp_info->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
3249         tcp_info->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3250         tcp_info->max_snd_window = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
3251         tcp_info->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
3252                                         cm_node->tcp_cntxt.rcv_wscale);
3253
3254         tcp_info->flow_label = 0;
3255         tcp_info->snd_mss = cpu_to_le32(((u32)cm_node->tcp_cntxt.mss));
3256         if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
3257                 tcp_info->insert_vlan_tag = true;
3258                 tcp_info->vlan_tag = cpu_to_le16(cm_node->vlan_id);
3259         }
3260         if (cm_node->ipv4) {
3261                 tcp_info->src_port = cpu_to_le16(cm_node->loc_port);
3262                 tcp_info->dst_port = cpu_to_le16(cm_node->rem_port);
3263
3264                 tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[0]);
3265                 tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[0]);
3266                 tcp_info->arp_idx =
3267                         cpu_to_le16((u16)i40iw_arp_table(
3268                                                          iwqp->iwdev,
3269                                                          &tcp_info->dest_ip_addr3,
3270                                                          true,
3271                                                          NULL,
3272                                                          I40IW_ARP_RESOLVE));
3273         } else {
3274                 tcp_info->src_port = cpu_to_le16(cm_node->loc_port);
3275                 tcp_info->dst_port = cpu_to_le16(cm_node->rem_port);
3276                 tcp_info->dest_ip_addr0 = cpu_to_le32(cm_node->rem_addr[0]);
3277                 tcp_info->dest_ip_addr1 = cpu_to_le32(cm_node->rem_addr[1]);
3278                 tcp_info->dest_ip_addr2 = cpu_to_le32(cm_node->rem_addr[2]);
3279                 tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[3]);
3280                 tcp_info->local_ipaddr0 = cpu_to_le32(cm_node->loc_addr[0]);
3281                 tcp_info->local_ipaddr1 = cpu_to_le32(cm_node->loc_addr[1]);
3282                 tcp_info->local_ipaddr2 = cpu_to_le32(cm_node->loc_addr[2]);
3283                 tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[3]);
3284                 tcp_info->arp_idx =
3285                         cpu_to_le16((u16)i40iw_arp_table(
3286                                                          iwqp->iwdev,
3287                                                          &tcp_info->dest_ip_addr0,
3288                                                          false,
3289                                                          NULL,
3290                                                          I40IW_ARP_RESOLVE));
3291         }
3292 }
3293
3294 /**
3295  * i40iw_cm_init_tsa_conn - setup qp for RTS
3296  * @iwqp: associate qp for the connection
3297  * @cm_node: connection's node
3298  */
3299 static void i40iw_cm_init_tsa_conn(struct i40iw_qp *iwqp,
3300                                    struct i40iw_cm_node *cm_node)
3301 {
3302         struct i40iw_tcp_offload_info tcp_info;
3303         struct i40iwarp_offload_info *iwarp_info;
3304         struct i40iw_qp_host_ctx_info *ctx_info;
3305         struct i40iw_device *iwdev = iwqp->iwdev;
3306         struct i40iw_sc_dev *dev = &iwqp->iwdev->sc_dev;
3307
3308         memset(&tcp_info, 0x00, sizeof(struct i40iw_tcp_offload_info));
3309         iwarp_info = &iwqp->iwarp_info;
3310         ctx_info = &iwqp->ctx_info;
3311
3312         ctx_info->tcp_info = &tcp_info;
3313         ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id;
3314         ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id;
3315
3316         iwarp_info->ord_size = cm_node->ord_size;
3317         iwarp_info->ird_size = i40iw_derive_hw_ird_setting(cm_node->ird_size);
3318
3319         if (iwarp_info->ord_size == 1)
3320                 iwarp_info->ord_size = 2;
3321
3322         iwarp_info->rd_enable = true;
3323         iwarp_info->rdmap_ver = 1;
3324         iwarp_info->ddp_ver = 1;
3325
3326         iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id;
3327
3328         ctx_info->tcp_info_valid = true;
3329         ctx_info->iwarp_info_valid = true;
3330         ctx_info->add_to_qoslist = true;
3331         ctx_info->user_pri = cm_node->user_pri;
3332
3333         i40iw_init_tcp_ctx(cm_node, &tcp_info, iwqp);
3334         if (cm_node->snd_mark_en) {
3335                 iwarp_info->snd_mark_en = true;
3336                 iwarp_info->snd_mark_offset = (tcp_info.snd_nxt &
3337                                 SNDMARKER_SEQNMASK) + cm_node->lsmm_size;
3338         }
3339
3340         cm_node->state = I40IW_CM_STATE_OFFLOADED;
3341         tcp_info.tcp_state = I40IW_TCP_STATE_ESTABLISHED;
3342         tcp_info.src_mac_addr_idx = iwdev->mac_ip_table_idx;
3343         tcp_info.tos = cm_node->tos;
3344
3345         dev->iw_priv_qp_ops->qp_setctx(&iwqp->sc_qp, (u64 *)(iwqp->host_ctx.va), ctx_info);
3346
3347         /* once tcp_info is set, no need to do it again */
3348         ctx_info->tcp_info_valid = false;
3349         ctx_info->iwarp_info_valid = false;
3350         ctx_info->add_to_qoslist = false;
3351 }
3352
3353 /**
3354  * i40iw_cm_disconn - when a connection is being closed
3355  * @iwqp: associate qp for the connection
3356  */
3357 void i40iw_cm_disconn(struct i40iw_qp *iwqp)
3358 {
3359         struct disconn_work *work;
3360         struct i40iw_device *iwdev = iwqp->iwdev;
3361         struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3362         unsigned long flags;
3363
3364         work = kzalloc(sizeof(*work), GFP_ATOMIC);
3365         if (!work)
3366                 return; /* Timer will clean up */
3367
3368         spin_lock_irqsave(&iwdev->qptable_lock, flags);
3369         if (!iwdev->qp_table[iwqp->ibqp.qp_num]) {
3370                 spin_unlock_irqrestore(&iwdev->qptable_lock, flags);
3371                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM,
3372                             "%s qp_id %d is already freed\n",
3373                              __func__, iwqp->ibqp.qp_num);
3374                 kfree(work);
3375                 return;
3376         }
3377         i40iw_add_ref(&iwqp->ibqp);
3378         spin_unlock_irqrestore(&iwdev->qptable_lock, flags);
3379
3380         work->iwqp = iwqp;
3381         INIT_WORK(&work->work, i40iw_disconnect_worker);
3382         queue_work(cm_core->disconn_wq, &work->work);
3383         return;
3384 }
3385
3386 /**
3387  * i40iw_qp_disconnect - free qp and close cm
3388  * @iwqp: associate qp for the connection
3389  */
3390 static void i40iw_qp_disconnect(struct i40iw_qp *iwqp)
3391 {
3392         struct i40iw_device *iwdev;
3393         struct i40iw_ib_device *iwibdev;
3394
3395         iwdev = to_iwdev(iwqp->ibqp.device);
3396         if (!iwdev) {
3397                 i40iw_pr_err("iwdev == NULL\n");
3398                 return;
3399         }
3400
3401         iwibdev = iwdev->iwibdev;
3402
3403         if (iwqp->active_conn) {
3404                 /* indicate this connection is NOT active */
3405                 iwqp->active_conn = 0;
3406         } else {
3407                 /* Need to free the Last Streaming Mode Message */
3408                 if (iwqp->ietf_mem.va) {
3409                         if (iwqp->lsmm_mr)
3410                                 iwibdev->ibdev.dereg_mr(iwqp->lsmm_mr);
3411                         i40iw_free_dma_mem(iwdev->sc_dev.hw, &iwqp->ietf_mem);
3412                 }
3413         }
3414
3415         /* close the CM node down if it is still active */
3416         if (iwqp->cm_node) {
3417                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "%s Call close API\n", __func__);
3418                 i40iw_cm_close(iwqp->cm_node);
3419         }
3420 }
3421
3422 /**
3423  * i40iw_cm_disconn_true - called by worker thread to disconnect qp
3424  * @iwqp: associate qp for the connection
3425  */
3426 static void i40iw_cm_disconn_true(struct i40iw_qp *iwqp)
3427 {
3428         struct iw_cm_id *cm_id;
3429         struct i40iw_device *iwdev;
3430         struct i40iw_sc_qp *qp = &iwqp->sc_qp;
3431         u16 last_ae;
3432         u8 original_hw_tcp_state;
3433         u8 original_ibqp_state;
3434         int disconn_status = 0;
3435         int issue_disconn = 0;
3436         int issue_close = 0;
3437         int issue_flush = 0;
3438         struct ib_event ibevent;
3439         unsigned long flags;
3440         int ret;
3441
3442         if (!iwqp) {
3443                 i40iw_pr_err("iwqp == NULL\n");
3444                 return;
3445         }
3446
3447         spin_lock_irqsave(&iwqp->lock, flags);
3448         cm_id = iwqp->cm_id;
3449         /* make sure we havent already closed this connection */
3450         if (!cm_id) {
3451                 spin_unlock_irqrestore(&iwqp->lock, flags);
3452                 return;
3453         }
3454
3455         iwdev = to_iwdev(iwqp->ibqp.device);
3456
3457         original_hw_tcp_state = iwqp->hw_tcp_state;
3458         original_ibqp_state = iwqp->ibqp_state;
3459         last_ae = iwqp->last_aeq;
3460
3461         if (qp->term_flags) {
3462                 issue_disconn = 1;
3463                 issue_close = 1;
3464                 iwqp->cm_id = NULL;
3465                 /*When term timer expires after cm_timer, don't want
3466                  *terminate-handler to issue cm_disconn which can re-free
3467                  *a QP even after its refcnt=0.
3468                  */
3469                 i40iw_terminate_del_timer(qp);
3470                 if (!iwqp->flush_issued) {
3471                         iwqp->flush_issued = 1;
3472                         issue_flush = 1;
3473                 }
3474         } else if ((original_hw_tcp_state == I40IW_TCP_STATE_CLOSE_WAIT) ||
3475                    ((original_ibqp_state == IB_QPS_RTS) &&
3476                     (last_ae == I40IW_AE_LLP_CONNECTION_RESET))) {
3477                 issue_disconn = 1;
3478                 if (last_ae == I40IW_AE_LLP_CONNECTION_RESET)
3479                         disconn_status = -ECONNRESET;
3480         }
3481
3482         if (((original_hw_tcp_state == I40IW_TCP_STATE_CLOSED) ||
3483              (original_hw_tcp_state == I40IW_TCP_STATE_TIME_WAIT) ||
3484              (last_ae == I40IW_AE_RDMAP_ROE_BAD_LLP_CLOSE) ||
3485              (last_ae == I40IW_AE_LLP_CONNECTION_RESET) ||
3486               iwdev->reset)) {
3487                 issue_close = 1;
3488                 iwqp->cm_id = NULL;
3489                 if (!iwqp->flush_issued) {
3490                         iwqp->flush_issued = 1;
3491                         issue_flush = 1;
3492                 }
3493         }
3494
3495         spin_unlock_irqrestore(&iwqp->lock, flags);
3496         if (issue_flush && !iwqp->destroyed) {
3497                 /* Flush the queues */
3498                 i40iw_flush_wqes(iwdev, iwqp);
3499
3500                 if (qp->term_flags && iwqp->ibqp.event_handler) {
3501                         ibevent.device = iwqp->ibqp.device;
3502                         ibevent.event = (qp->eventtype == TERM_EVENT_QP_FATAL) ?
3503                                         IB_EVENT_QP_FATAL : IB_EVENT_QP_ACCESS_ERR;
3504                         ibevent.element.qp = &iwqp->ibqp;
3505                         iwqp->ibqp.event_handler(&ibevent, iwqp->ibqp.qp_context);
3506                 }
3507         }
3508
3509         if (cm_id && cm_id->event_handler) {
3510                 if (issue_disconn) {
3511                         ret = i40iw_send_cm_event(NULL,
3512                                                   cm_id,
3513                                                   IW_CM_EVENT_DISCONNECT,
3514                                                   disconn_status);
3515
3516                         if (ret)
3517                                 i40iw_debug(&iwdev->sc_dev,
3518                                             I40IW_DEBUG_CM,
3519                                             "disconnect event failed %s: - cm_id = %p\n",
3520                                             __func__, cm_id);
3521                 }
3522                 if (issue_close) {
3523                         i40iw_qp_disconnect(iwqp);
3524                         cm_id->provider_data = iwqp;
3525                         ret = i40iw_send_cm_event(NULL, cm_id, IW_CM_EVENT_CLOSE, 0);
3526                         if (ret)
3527                                 i40iw_debug(&iwdev->sc_dev,
3528                                             I40IW_DEBUG_CM,
3529                                             "close event failed %s: - cm_id = %p\n",
3530                                             __func__, cm_id);
3531                         cm_id->rem_ref(cm_id);
3532                 }
3533         }
3534 }
3535
3536 /**
3537  * i40iw_disconnect_worker - worker for connection close
3538  * @work: points or disconn structure
3539  */
3540 static void i40iw_disconnect_worker(struct work_struct *work)
3541 {
3542         struct disconn_work *dwork = container_of(work, struct disconn_work, work);
3543         struct i40iw_qp *iwqp = dwork->iwqp;
3544
3545         kfree(dwork);
3546         i40iw_cm_disconn_true(iwqp);
3547         i40iw_rem_ref(&iwqp->ibqp);
3548 }
3549
3550 /**
3551  * i40iw_accept - registered call for connection to be accepted
3552  * @cm_id: cm information for passive connection
3553  * @conn_param: accpet parameters
3554  */
3555 int i40iw_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3556 {
3557         struct ib_qp *ibqp;
3558         struct i40iw_qp *iwqp;
3559         struct i40iw_device *iwdev;
3560         struct i40iw_sc_dev *dev;
3561         struct i40iw_cm_node *cm_node;
3562         struct ib_qp_attr attr;
3563         int passive_state;
3564         struct ib_mr *ibmr;
3565         struct i40iw_pd *iwpd;
3566         u16 buf_len = 0;
3567         struct i40iw_kmem_info accept;
3568         enum i40iw_status_code status;
3569         u64 tagged_offset;
3570
3571         memset(&attr, 0, sizeof(attr));
3572         ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn);
3573         if (!ibqp)
3574                 return -EINVAL;
3575
3576         iwqp = to_iwqp(ibqp);
3577         iwdev = iwqp->iwdev;
3578         dev = &iwdev->sc_dev;
3579         cm_node = (struct i40iw_cm_node *)cm_id->provider_data;
3580
3581         if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) {
3582                 cm_node->ipv4 = true;
3583                 cm_node->vlan_id = i40iw_get_vlan_ipv4(cm_node->loc_addr);
3584         } else {
3585                 cm_node->ipv4 = false;
3586                 i40iw_netdev_vlan_ipv6(cm_node->loc_addr, &cm_node->vlan_id);
3587         }
3588         i40iw_debug(cm_node->dev,
3589                     I40IW_DEBUG_CM,
3590                     "Accept vlan_id=%d\n",
3591                     cm_node->vlan_id);
3592         if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
3593                 if (cm_node->loopbackpartner)
3594                         i40iw_rem_ref_cm_node(cm_node->loopbackpartner);
3595                 i40iw_rem_ref_cm_node(cm_node);
3596                 return -EINVAL;
3597         }
3598
3599         passive_state = atomic_add_return(1, &cm_node->passive_state);
3600         if (passive_state == I40IW_SEND_RESET_EVENT) {
3601                 i40iw_rem_ref_cm_node(cm_node);
3602                 return -ECONNRESET;
3603         }
3604
3605         cm_node->cm_core->stats_accepts++;
3606         iwqp->cm_node = (void *)cm_node;
3607         cm_node->iwqp = iwqp;
3608
3609         buf_len = conn_param->private_data_len + I40IW_MAX_IETF_SIZE;
3610
3611         status = i40iw_allocate_dma_mem(dev->hw, &iwqp->ietf_mem, buf_len, 1);
3612
3613         if (status)
3614                 return -ENOMEM;
3615         cm_node->pdata.size = conn_param->private_data_len;
3616         accept.addr = iwqp->ietf_mem.va;
3617         accept.size = i40iw_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY);
3618         memcpy(accept.addr + accept.size, conn_param->private_data,
3619                conn_param->private_data_len);
3620
3621         /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3622         if ((cm_node->ipv4 &&
3623              !i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
3624             (!cm_node->ipv4 &&
3625              !i40iw_ipv6_is_loopback(cm_node->loc_addr, cm_node->rem_addr))) {
3626                 iwpd = iwqp->iwpd;
3627                 tagged_offset = (uintptr_t)iwqp->ietf_mem.va;
3628                 ibmr = i40iw_reg_phys_mr(&iwpd->ibpd,
3629                                          iwqp->ietf_mem.pa,
3630                                          buf_len,
3631                                          IB_ACCESS_LOCAL_WRITE,
3632                                          &tagged_offset);
3633                 if (IS_ERR(ibmr)) {
3634                         i40iw_free_dma_mem(dev->hw, &iwqp->ietf_mem);
3635                         return -ENOMEM;
3636                 }
3637
3638                 ibmr->pd = &iwpd->ibpd;
3639                 ibmr->device = iwpd->ibpd.device;
3640                 iwqp->lsmm_mr = ibmr;
3641                 if (iwqp->page)
3642                         iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
3643                 dev->iw_priv_qp_ops->qp_send_lsmm(&iwqp->sc_qp,
3644                                                         iwqp->ietf_mem.va,
3645                                                         (accept.size + conn_param->private_data_len),
3646                                                         ibmr->lkey);
3647
3648         } else {
3649                 if (iwqp->page)
3650                         iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
3651                 dev->iw_priv_qp_ops->qp_send_lsmm(&iwqp->sc_qp, NULL, 0, 0);
3652         }
3653
3654         if (iwqp->page)
3655                 kunmap(iwqp->page);
3656
3657         iwqp->cm_id = cm_id;
3658         cm_node->cm_id = cm_id;
3659
3660         cm_id->provider_data = (void *)iwqp;
3661         iwqp->active_conn = 0;
3662
3663         cm_node->lsmm_size = accept.size + conn_param->private_data_len;
3664         i40iw_cm_init_tsa_conn(iwqp, cm_node);
3665         cm_id->add_ref(cm_id);
3666         i40iw_add_ref(&iwqp->ibqp);
3667
3668         i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0);
3669
3670         attr.qp_state = IB_QPS_RTS;
3671         cm_node->qhash_set = false;
3672         i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
3673         if (cm_node->loopbackpartner) {
3674                 cm_node->loopbackpartner->pdata.size = conn_param->private_data_len;
3675
3676                 /* copy entire MPA frame to our cm_node's frame */
3677                 memcpy(cm_node->loopbackpartner->pdata_buf,
3678                        conn_param->private_data,
3679                        conn_param->private_data_len);
3680                 i40iw_create_event(cm_node->loopbackpartner, I40IW_CM_EVENT_CONNECTED);
3681         }
3682
3683         cm_node->accelerated = 1;
3684         if (cm_node->accept_pend) {
3685                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
3686                 cm_node->accept_pend = 0;
3687         }
3688         return 0;
3689 }
3690
3691 /**
3692  * i40iw_reject - registered call for connection to be rejected
3693  * @cm_id: cm information for passive connection
3694  * @pdata: private data to be sent
3695  * @pdata_len: private data length
3696  */
3697 int i40iw_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3698 {
3699         struct i40iw_device *iwdev;
3700         struct i40iw_cm_node *cm_node;
3701         struct i40iw_cm_node *loopback;
3702
3703         cm_node = (struct i40iw_cm_node *)cm_id->provider_data;
3704         loopback = cm_node->loopbackpartner;
3705         cm_node->cm_id = cm_id;
3706         cm_node->pdata.size = pdata_len;
3707
3708         iwdev = to_iwdev(cm_id->device);
3709         if (!iwdev)
3710                 return -EINVAL;
3711         cm_node->cm_core->stats_rejects++;
3712
3713         if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER)
3714                 return -EINVAL;
3715
3716         if (loopback) {
3717                 memcpy(&loopback->pdata_buf, pdata, pdata_len);
3718                 loopback->pdata.size = pdata_len;
3719         }
3720
3721         return i40iw_cm_reject(cm_node, pdata, pdata_len);
3722 }
3723
3724 /**
3725  * i40iw_connect - registered call for connection to be established
3726  * @cm_id: cm information for passive connection
3727  * @conn_param: Information about the connection
3728  */
3729 int i40iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3730 {
3731         struct ib_qp *ibqp;
3732         struct i40iw_qp *iwqp;
3733         struct i40iw_device *iwdev;
3734         struct i40iw_cm_node *cm_node;
3735         struct i40iw_cm_info cm_info;
3736         struct sockaddr_in *laddr;
3737         struct sockaddr_in *raddr;
3738         struct sockaddr_in6 *laddr6;
3739         struct sockaddr_in6 *raddr6;
3740         bool qhash_set = false;
3741         int apbvt_set = 0;
3742         int err = 0;
3743         enum i40iw_status_code status;
3744
3745         ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn);
3746         if (!ibqp)
3747                 return -EINVAL;
3748         iwqp = to_iwqp(ibqp);
3749         if (!iwqp)
3750                 return -EINVAL;
3751         iwdev = to_iwdev(iwqp->ibqp.device);
3752         if (!iwdev)
3753                 return -EINVAL;
3754
3755         laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3756         raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
3757         laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3758         raddr6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr;
3759
3760         if (!(laddr->sin_port) || !(raddr->sin_port))
3761                 return -EINVAL;
3762
3763         iwqp->active_conn = 1;
3764         iwqp->cm_id = NULL;
3765         cm_id->provider_data = iwqp;
3766
3767         /* set up the connection params for the node */
3768         if (cm_id->remote_addr.ss_family == AF_INET) {
3769                 cm_info.ipv4 = true;
3770                 memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr));
3771                 memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr));
3772                 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3773                 cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr);
3774                 cm_info.loc_port = ntohs(laddr->sin_port);
3775                 cm_info.rem_port = ntohs(raddr->sin_port);
3776                 cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr);
3777         } else {
3778                 cm_info.ipv4 = false;
3779                 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3780                                     laddr6->sin6_addr.in6_u.u6_addr32);
3781                 i40iw_copy_ip_ntohl(cm_info.rem_addr,
3782                                     raddr6->sin6_addr.in6_u.u6_addr32);
3783                 cm_info.loc_port = ntohs(laddr6->sin6_port);
3784                 cm_info.rem_port = ntohs(raddr6->sin6_port);
3785                 i40iw_netdev_vlan_ipv6(cm_info.loc_addr, &cm_info.vlan_id);
3786         }
3787         cm_info.cm_id = cm_id;
3788         cm_info.tos = cm_id->tos;
3789         cm_info.user_pri = rt_tos2priority(cm_id->tos);
3790         i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB, "%s TOS:[%d] UP:[%d]\n",
3791                     __func__, cm_id->tos, cm_info.user_pri);
3792         if ((cm_info.ipv4 && (laddr->sin_addr.s_addr != raddr->sin_addr.s_addr)) ||
3793             (!cm_info.ipv4 && memcmp(laddr6->sin6_addr.in6_u.u6_addr32,
3794                                      raddr6->sin6_addr.in6_u.u6_addr32,
3795                                      sizeof(laddr6->sin6_addr.in6_u.u6_addr32)))) {
3796                 status = i40iw_manage_qhash(iwdev,
3797                                             &cm_info,
3798                                             I40IW_QHASH_TYPE_TCP_ESTABLISHED,
3799                                             I40IW_QHASH_MANAGE_TYPE_ADD,
3800                                             NULL,
3801                                             true);
3802                 if (status)
3803                         return -EINVAL;
3804                 qhash_set = true;
3805         }
3806         status = i40iw_manage_apbvt(iwdev, cm_info.loc_port, I40IW_MANAGE_APBVT_ADD);
3807         if (status) {
3808                 i40iw_manage_qhash(iwdev,
3809                                    &cm_info,
3810                                    I40IW_QHASH_TYPE_TCP_ESTABLISHED,
3811                                    I40IW_QHASH_MANAGE_TYPE_DELETE,
3812                                    NULL,
3813                                    false);
3814                 return -EINVAL;
3815         }
3816
3817         apbvt_set = 1;
3818         cm_id->add_ref(cm_id);
3819         cm_node = i40iw_create_cm_node(&iwdev->cm_core, iwdev,
3820                                        conn_param->private_data_len,
3821                                        (void *)conn_param->private_data,
3822                                        &cm_info);
3823
3824         if (IS_ERR(cm_node)) {
3825                 err = PTR_ERR(cm_node);
3826                 goto err_out;
3827         }
3828
3829         i40iw_record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord);
3830         if (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO &&
3831             !cm_node->ord_size)
3832                 cm_node->ord_size = 1;
3833
3834         cm_node->apbvt_set = apbvt_set;
3835         cm_node->qhash_set = qhash_set;
3836         iwqp->cm_node = cm_node;
3837         cm_node->iwqp = iwqp;
3838         iwqp->cm_id = cm_id;
3839         i40iw_add_ref(&iwqp->ibqp);
3840
3841         if (cm_node->state != I40IW_CM_STATE_OFFLOADED) {
3842                 cm_node->state = I40IW_CM_STATE_SYN_SENT;
3843                 err = i40iw_send_syn(cm_node, 0);
3844                 if (err) {
3845                         i40iw_rem_ref_cm_node(cm_node);
3846                         goto err_out;
3847                 }
3848         }
3849
3850         i40iw_debug(cm_node->dev,
3851                     I40IW_DEBUG_CM,
3852                     "Api - connect(): port=0x%04x, cm_node=%p, cm_id = %p.\n",
3853                     cm_node->rem_port,
3854                     cm_node,
3855                     cm_node->cm_id);
3856         return 0;
3857
3858 err_out:
3859         if (cm_info.ipv4)
3860                 i40iw_debug(&iwdev->sc_dev,
3861                             I40IW_DEBUG_CM,
3862                             "Api - connect() FAILED: dest addr=%pI4",
3863                             cm_info.rem_addr);
3864         else
3865                 i40iw_debug(&iwdev->sc_dev,
3866                             I40IW_DEBUG_CM,
3867                             "Api - connect() FAILED: dest addr=%pI6",
3868                             cm_info.rem_addr);
3869
3870         if (qhash_set)
3871                 i40iw_manage_qhash(iwdev,
3872                                    &cm_info,
3873                                    I40IW_QHASH_TYPE_TCP_ESTABLISHED,
3874                                    I40IW_QHASH_MANAGE_TYPE_DELETE,
3875                                    NULL,
3876                                    false);
3877
3878         if (apbvt_set && !i40iw_listen_port_in_use(&iwdev->cm_core,
3879                                                    cm_info.loc_port))
3880                 i40iw_manage_apbvt(iwdev,
3881                                    cm_info.loc_port,
3882                                    I40IW_MANAGE_APBVT_DEL);
3883         cm_id->rem_ref(cm_id);
3884         iwdev->cm_core.stats_connect_errs++;
3885         return err;
3886 }
3887
3888 /**
3889  * i40iw_create_listen - registered call creating listener
3890  * @cm_id: cm information for passive connection
3891  * @backlog: to max accept pending count
3892  */
3893 int i40iw_create_listen(struct iw_cm_id *cm_id, int backlog)
3894 {
3895         struct i40iw_device *iwdev;
3896         struct i40iw_cm_listener *cm_listen_node;
3897         struct i40iw_cm_info cm_info;
3898         enum i40iw_status_code ret;
3899         struct sockaddr_in *laddr;
3900         struct sockaddr_in6 *laddr6;
3901         bool wildcard = false;
3902
3903         iwdev = to_iwdev(cm_id->device);
3904         if (!iwdev)
3905                 return -EINVAL;
3906
3907         laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3908         laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3909         memset(&cm_info, 0, sizeof(cm_info));
3910         if (laddr->sin_family == AF_INET) {
3911                 cm_info.ipv4 = true;
3912                 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3913                 cm_info.loc_port = ntohs(laddr->sin_port);
3914
3915                 if (laddr->sin_addr.s_addr != INADDR_ANY)
3916                         cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr);
3917                 else
3918                         wildcard = true;
3919
3920         } else {
3921                 cm_info.ipv4 = false;
3922                 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3923                                     laddr6->sin6_addr.in6_u.u6_addr32);
3924                 cm_info.loc_port = ntohs(laddr6->sin6_port);
3925                 if (ipv6_addr_type(&laddr6->sin6_addr) != IPV6_ADDR_ANY)
3926                         i40iw_netdev_vlan_ipv6(cm_info.loc_addr,
3927                                                &cm_info.vlan_id);
3928                 else
3929                         wildcard = true;
3930         }
3931         cm_info.backlog = backlog;
3932         cm_info.cm_id = cm_id;
3933
3934         cm_listen_node = i40iw_make_listen_node(&iwdev->cm_core, iwdev, &cm_info);
3935         if (!cm_listen_node) {
3936                 i40iw_pr_err("cm_listen_node == NULL\n");
3937                 return -ENOMEM;
3938         }
3939
3940         cm_id->provider_data = cm_listen_node;
3941
3942         cm_listen_node->tos = cm_id->tos;
3943         cm_listen_node->user_pri = rt_tos2priority(cm_id->tos);
3944         cm_info.user_pri = cm_listen_node->user_pri;
3945
3946         if (!cm_listen_node->reused_node) {
3947                 if (wildcard) {
3948                         if (cm_info.ipv4)
3949                                 ret = i40iw_add_mqh_4(iwdev,
3950                                                       &cm_info,
3951                                                       cm_listen_node);
3952                         else
3953                                 ret = i40iw_add_mqh_6(iwdev,
3954                                                       &cm_info,
3955                                                       cm_listen_node);
3956                         if (ret)
3957                                 goto error;
3958
3959                         ret = i40iw_manage_apbvt(iwdev,
3960                                                  cm_info.loc_port,
3961                                                  I40IW_MANAGE_APBVT_ADD);
3962
3963                         if (ret)
3964                                 goto error;
3965                 } else {
3966                         ret = i40iw_manage_qhash(iwdev,
3967                                                  &cm_info,
3968                                                  I40IW_QHASH_TYPE_TCP_SYN,
3969                                                  I40IW_QHASH_MANAGE_TYPE_ADD,
3970                                                  NULL,
3971                                                  true);
3972                         if (ret)
3973                                 goto error;
3974                         cm_listen_node->qhash_set = true;
3975                         ret = i40iw_manage_apbvt(iwdev,
3976                                                  cm_info.loc_port,
3977                                                  I40IW_MANAGE_APBVT_ADD);
3978                         if (ret)
3979                                 goto error;
3980                 }
3981         }
3982         cm_id->add_ref(cm_id);
3983         cm_listen_node->cm_core->stats_listen_created++;
3984         return 0;
3985  error:
3986         i40iw_cm_del_listen(&iwdev->cm_core, (void *)cm_listen_node, false);
3987         return -EINVAL;
3988 }
3989
3990 /**
3991  * i40iw_destroy_listen - registered call to destroy listener
3992  * @cm_id: cm information for passive connection
3993  */
3994 int i40iw_destroy_listen(struct iw_cm_id *cm_id)
3995 {
3996         struct i40iw_device *iwdev;
3997
3998         iwdev = to_iwdev(cm_id->device);
3999         if (cm_id->provider_data)
4000                 i40iw_cm_del_listen(&iwdev->cm_core, cm_id->provider_data, true);
4001         else
4002                 i40iw_pr_err("cm_id->provider_data was NULL\n");
4003
4004         cm_id->rem_ref(cm_id);
4005
4006         return 0;
4007 }
4008
4009 /**
4010  * i40iw_cm_event_connected - handle connected active node
4011  * @event: the info for cm_node of connection
4012  */
4013 static void i40iw_cm_event_connected(struct i40iw_cm_event *event)
4014 {
4015         struct i40iw_qp *iwqp;
4016         struct i40iw_device *iwdev;
4017         struct i40iw_cm_node *cm_node;
4018         struct i40iw_sc_dev *dev;
4019         struct ib_qp_attr attr;
4020         struct iw_cm_id *cm_id;
4021         int status;
4022         bool read0;
4023
4024         cm_node = event->cm_node;
4025         cm_id = cm_node->cm_id;
4026         iwqp = (struct i40iw_qp *)cm_id->provider_data;
4027         iwdev = to_iwdev(iwqp->ibqp.device);
4028         dev = &iwdev->sc_dev;
4029
4030         if (iwqp->destroyed) {
4031                 status = -ETIMEDOUT;
4032                 goto error;
4033         }
4034         i40iw_cm_init_tsa_conn(iwqp, cm_node);
4035         read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO);
4036         if (iwqp->page)
4037                 iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
4038         dev->iw_priv_qp_ops->qp_send_rtt(&iwqp->sc_qp, read0);
4039         if (iwqp->page)
4040                 kunmap(iwqp->page);
4041         status = i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 0);
4042         if (status)
4043                 i40iw_pr_err("send cm event\n");
4044
4045         memset(&attr, 0, sizeof(attr));
4046         attr.qp_state = IB_QPS_RTS;
4047         cm_node->qhash_set = false;
4048         i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
4049
4050         cm_node->accelerated = 1;
4051
4052         return;
4053
4054 error:
4055         iwqp->cm_id = NULL;
4056         cm_id->provider_data = NULL;
4057         i40iw_send_cm_event(event->cm_node,
4058                             cm_id,
4059                             IW_CM_EVENT_CONNECT_REPLY,
4060                             status);
4061         cm_id->rem_ref(cm_id);
4062         i40iw_rem_ref_cm_node(event->cm_node);
4063 }
4064
4065 /**
4066  * i40iw_cm_event_reset - handle reset
4067  * @event: the info for cm_node of connection
4068  */
4069 static void i40iw_cm_event_reset(struct i40iw_cm_event *event)
4070 {
4071         struct i40iw_cm_node *cm_node = event->cm_node;
4072         struct iw_cm_id   *cm_id = cm_node->cm_id;
4073         struct i40iw_qp *iwqp;
4074
4075         if (!cm_id)
4076                 return;
4077
4078         iwqp = cm_id->provider_data;
4079         if (!iwqp)
4080                 return;
4081
4082         i40iw_debug(cm_node->dev,
4083                     I40IW_DEBUG_CM,
4084                     "reset event %p - cm_id = %p\n",
4085                      event->cm_node, cm_id);
4086         iwqp->cm_id = NULL;
4087
4088         i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT, -ECONNRESET);
4089         i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0);
4090 }
4091
4092 /**
4093  * i40iw_cm_event_handler - worker thread callback to send event to cm upper layer
4094  * @work: pointer of cm event info.
4095  */
4096 static void i40iw_cm_event_handler(struct work_struct *work)
4097 {
4098         struct i40iw_cm_event *event = container_of(work,
4099                                                     struct i40iw_cm_event,
4100                                                     event_work);
4101         struct i40iw_cm_node *cm_node;
4102
4103         if (!event || !event->cm_node || !event->cm_node->cm_core)
4104                 return;
4105
4106         cm_node = event->cm_node;
4107
4108         switch (event->type) {
4109         case I40IW_CM_EVENT_MPA_REQ:
4110                 i40iw_send_cm_event(cm_node,
4111                                     cm_node->cm_id,
4112                                     IW_CM_EVENT_CONNECT_REQUEST,
4113                                     0);
4114                 break;
4115         case I40IW_CM_EVENT_RESET:
4116                 i40iw_cm_event_reset(event);
4117                 break;
4118         case I40IW_CM_EVENT_CONNECTED:
4119                 if (!event->cm_node->cm_id ||
4120                     (event->cm_node->state != I40IW_CM_STATE_OFFLOADED))
4121                         break;
4122                 i40iw_cm_event_connected(event);
4123                 break;
4124         case I40IW_CM_EVENT_MPA_REJECT:
4125                 if (!event->cm_node->cm_id ||
4126                     (cm_node->state == I40IW_CM_STATE_OFFLOADED))
4127                         break;
4128                 i40iw_send_cm_event(cm_node,
4129                                     cm_node->cm_id,
4130                                     IW_CM_EVENT_CONNECT_REPLY,
4131                                     -ECONNREFUSED);
4132                 break;
4133         case I40IW_CM_EVENT_ABORTED:
4134                 if (!event->cm_node->cm_id ||
4135                     (event->cm_node->state == I40IW_CM_STATE_OFFLOADED))
4136                         break;
4137                 i40iw_event_connect_error(event);
4138                 break;
4139         default:
4140                 i40iw_pr_err("event type = %d\n", event->type);
4141                 break;
4142         }
4143
4144         event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
4145         i40iw_rem_ref_cm_node(event->cm_node);
4146         kfree(event);
4147 }
4148
4149 /**
4150  * i40iw_cm_post_event - queue event request for worker thread
4151  * @event: cm node's info for up event call
4152  */
4153 static void i40iw_cm_post_event(struct i40iw_cm_event *event)
4154 {
4155         atomic_inc(&event->cm_node->ref_count);
4156         event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
4157         INIT_WORK(&event->event_work, i40iw_cm_event_handler);
4158
4159         queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
4160 }
4161
4162 /**
4163  * i40iw_qhash_ctrl - enable/disable qhash for list
4164  * @iwdev: device pointer
4165  * @parent_listen_node: parent listen node
4166  * @nfo: cm info node
4167  * @ipaddr: Pointer to IPv4 or IPv6 address
4168  * @ipv4: flag indicating IPv4 when true
4169  * @ifup: flag indicating interface up when true
4170  *
4171  * Enables or disables the qhash for the node in the child
4172  * listen list that matches ipaddr. If no matching IP was found
4173  * it will allocate and add a new child listen node to the
4174  * parent listen node. The listen_list_lock is assumed to be
4175  * held when called.
4176  */
4177 static void i40iw_qhash_ctrl(struct i40iw_device *iwdev,
4178                              struct i40iw_cm_listener *parent_listen_node,
4179                              struct i40iw_cm_info *nfo,
4180                              u32 *ipaddr, bool ipv4, bool ifup)
4181 {
4182         struct list_head *child_listen_list = &parent_listen_node->child_listen_list;
4183         struct i40iw_cm_listener *child_listen_node;
4184         struct list_head *pos, *tpos;
4185         enum i40iw_status_code ret;
4186         bool node_allocated = false;
4187         enum i40iw_quad_hash_manage_type op =
4188                 ifup ? I40IW_QHASH_MANAGE_TYPE_ADD : I40IW_QHASH_MANAGE_TYPE_DELETE;
4189
4190         list_for_each_safe(pos, tpos, child_listen_list) {
4191                 child_listen_node =
4192                         list_entry(pos,
4193                                    struct i40iw_cm_listener,
4194                                    child_listen_list);
4195                 if (!memcmp(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16))
4196                         goto set_qhash;
4197         }
4198
4199         /* if not found then add a child listener if interface is going up */
4200         if (!ifup)
4201                 return;
4202         child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
4203         if (!child_listen_node)
4204                 return;
4205         node_allocated = true;
4206         memcpy(child_listen_node, parent_listen_node, sizeof(*child_listen_node));
4207
4208         memcpy(child_listen_node->loc_addr, ipaddr,  ipv4 ? 4 : 16);
4209
4210 set_qhash:
4211         memcpy(nfo->loc_addr,
4212                child_listen_node->loc_addr,
4213                sizeof(nfo->loc_addr));
4214         nfo->vlan_id = child_listen_node->vlan_id;
4215         ret = i40iw_manage_qhash(iwdev, nfo,
4216                                  I40IW_QHASH_TYPE_TCP_SYN,
4217                                  op,
4218                                  NULL, false);
4219         if (!ret) {
4220                 child_listen_node->qhash_set = ifup;
4221                 if (node_allocated)
4222                         list_add(&child_listen_node->child_listen_list,
4223                                  &parent_listen_node->child_listen_list);
4224         } else if (node_allocated) {
4225                 kfree(child_listen_node);
4226         }
4227 }
4228
4229 /**
4230  * i40iw_cm_disconnect_all - disconnect all connected qp's
4231  * @iwdev: device pointer
4232  */
4233 void i40iw_cm_disconnect_all(struct i40iw_device *iwdev)
4234 {
4235         struct i40iw_cm_core *cm_core = &iwdev->cm_core;
4236         struct list_head *list_core_temp;
4237         struct list_head *list_node;
4238         struct i40iw_cm_node *cm_node;
4239         unsigned long flags;
4240         struct list_head connected_list;
4241         struct ib_qp_attr attr;
4242
4243         INIT_LIST_HEAD(&connected_list);
4244         spin_lock_irqsave(&cm_core->ht_lock, flags);
4245         list_for_each_safe(list_node, list_core_temp, &cm_core->connected_nodes) {
4246                 cm_node = container_of(list_node, struct i40iw_cm_node, list);
4247                 atomic_inc(&cm_node->ref_count);
4248                 list_add(&cm_node->connected_entry, &connected_list);
4249         }
4250         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
4251
4252         list_for_each_safe(list_node, list_core_temp, &connected_list) {
4253                 cm_node = container_of(list_node, struct i40iw_cm_node, connected_entry);
4254                 attr.qp_state = IB_QPS_ERR;
4255                 i40iw_modify_qp(&cm_node->iwqp->ibqp, &attr, IB_QP_STATE, NULL);
4256                 if (iwdev->reset)
4257                         i40iw_cm_disconn(cm_node->iwqp);
4258                 i40iw_rem_ref_cm_node(cm_node);
4259         }
4260 }
4261
4262 /**
4263  * i40iw_ifdown_notify - process an ifdown on an interface
4264  * @iwdev: device pointer
4265  * @ipaddr: Pointer to IPv4 or IPv6 address
4266  * @ipv4: flag indicating IPv4 when true
4267  * @ifup: flag indicating interface up when true
4268  */
4269 void i40iw_if_notify(struct i40iw_device *iwdev, struct net_device *netdev,
4270                      u32 *ipaddr, bool ipv4, bool ifup)
4271 {
4272         struct i40iw_cm_core *cm_core = &iwdev->cm_core;
4273         unsigned long flags;
4274         struct i40iw_cm_listener *listen_node;
4275         static const u32 ip_zero[4] = { 0, 0, 0, 0 };
4276         struct i40iw_cm_info nfo;
4277         u16 vlan_id = rdma_vlan_dev_vlan_id(netdev);
4278         enum i40iw_status_code ret;
4279         enum i40iw_quad_hash_manage_type op =
4280                 ifup ? I40IW_QHASH_MANAGE_TYPE_ADD : I40IW_QHASH_MANAGE_TYPE_DELETE;
4281
4282         /* Disable or enable qhash for listeners */
4283         spin_lock_irqsave(&cm_core->listen_list_lock, flags);
4284         list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
4285                 if (vlan_id == listen_node->vlan_id &&
4286                     (!memcmp(listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16) ||
4287                     !memcmp(listen_node->loc_addr, ip_zero, ipv4 ? 4 : 16))) {
4288                         memcpy(nfo.loc_addr, listen_node->loc_addr,
4289                                sizeof(nfo.loc_addr));
4290                         nfo.loc_port = listen_node->loc_port;
4291                         nfo.ipv4 = listen_node->ipv4;
4292                         nfo.vlan_id = listen_node->vlan_id;
4293                         nfo.user_pri = listen_node->user_pri;
4294                         if (!list_empty(&listen_node->child_listen_list)) {
4295                                 i40iw_qhash_ctrl(iwdev,
4296                                                  listen_node,
4297                                                  &nfo,
4298                                                  ipaddr, ipv4, ifup);
4299                         } else if (memcmp(listen_node->loc_addr, ip_zero,
4300                                           ipv4 ? 4 : 16)) {
4301                                 ret = i40iw_manage_qhash(iwdev,
4302                                                          &nfo,
4303                                                          I40IW_QHASH_TYPE_TCP_SYN,
4304                                                          op,
4305                                                          NULL,
4306                                                          false);
4307                                 if (!ret)
4308                                         listen_node->qhash_set = ifup;
4309                         }
4310                 }
4311         }
4312         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
4313
4314         /* disconnect any connected qp's on ifdown */
4315         if (!ifup)
4316                 i40iw_cm_disconnect_all(iwdev);
4317 }