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