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/secure_seq.h>
  61 #include <net/tcp.h>
  62 #include <asm/checksum.h>
  63
  64 #include "i40iw.h"
  65
  66 static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *);
  67 static void i40iw_cm_post_event(struct i40iw_cm_event *event);
  68 static void i40iw_disconnect_worker(struct work_struct *work);
  69
  70 /**
  71  * i40iw_free_sqbuf - put back puda buffer if refcount = 0
  72  * @vsi: pointer to vsi structure
  73  * @buf: puda buffer to free
  74  */
  75 void i40iw_free_sqbuf(struct i40iw_sc_vsi *vsi, void *bufp)
  76 {
  77         struct i40iw_puda_buf *buf = (struct i40iw_puda_buf *)bufp;
  78         struct i40iw_puda_rsrc *ilq = vsi->ilq;
  79
  80         if (!atomic_dec_return(&buf->refcount))
  81                 i40iw_puda_ret_bufpool(ilq, buf);
  82 }
  83
  84 /**
  85  * i40iw_derive_hw_ird_setting - Calculate IRD
  86  *
  87  * @cm_ird: IRD of connection's node
  88  *
  89  * The ird from the connection is rounded to a supported HW
  90  * setting (2,8,32,64) and then encoded for ird_size field of
  91  * qp_ctx
  92  */
  93 static u8 i40iw_derive_hw_ird_setting(u16 cm_ird)
  94 {
  95         u8 encoded_ird_size;
  96
  97         /* ird_size field is encoded in qp_ctx */
  98         switch (cm_ird ? roundup_pow_of_two(cm_ird) : 0) {
  99         case I40IW_HW_IRD_SETTING_64:
 100                 encoded_ird_size = 3;
 101                 break;
 102         case I40IW_HW_IRD_SETTING_32:
 103         case I40IW_HW_IRD_SETTING_16:
 104                 encoded_ird_size = 2;
 105                 break;
 106         case I40IW_HW_IRD_SETTING_8:
 107         case I40IW_HW_IRD_SETTING_4:
 108                 encoded_ird_size = 1;
 109                 break;
 110         case I40IW_HW_IRD_SETTING_2:
 111         default:
 112                 encoded_ird_size = 0;
 113                 break;
 114         }
 115         return encoded_ird_size;
 116 }
 117
 118 /**
 119  * i40iw_record_ird_ord - Record IRD/ORD passed in
 120  * @cm_node: connection's node
 121  * @conn_ird: connection IRD
 122  * @conn_ord: connection ORD
 123  */
 124 static void i40iw_record_ird_ord(struct i40iw_cm_node *cm_node, u32 conn_ird,
 125                                  u32 conn_ord)
 126 {
 127         if (conn_ird > I40IW_MAX_IRD_SIZE)
 128                 conn_ird = I40IW_MAX_IRD_SIZE;
 129
 130         if (conn_ord > I40IW_MAX_ORD_SIZE)
 131                 conn_ord = I40IW_MAX_ORD_SIZE;
 132         else if (!conn_ord && cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO)
 133                 conn_ord = 1;
 134
 135         cm_node->ird_size = conn_ird;
 136         cm_node->ord_size = conn_ord;
 137 }
 138
 139 /**
 140  * i40iw_copy_ip_ntohl - change network to host ip
 141  * @dst: host ip
 142  * @src: big endian
 143  */
 144 void i40iw_copy_ip_ntohl(u32 *dst, __be32 *src)
 145 {
 146         *dst++ = ntohl(*src++);
 147         *dst++ = ntohl(*src++);
 148         *dst++ = ntohl(*src++);
 149         *dst = ntohl(*src);
 150 }
 151
 152 /**
 153  * i40iw_copy_ip_htonl - change host addr to network ip
 154  * @dst: host ip
 155  * @src: little endian
 156  */
 157 static inline void i40iw_copy_ip_htonl(__be32 *dst, u32 *src)
 158 {
 159         *dst++ = htonl(*src++);
 160         *dst++ = htonl(*src++);
 161         *dst++ = htonl(*src++);
 162         *dst = htonl(*src);
 163 }
 164
 165 /**
 166  * i40iw_fill_sockaddr4 - get addr info for passive connection
 167  * @cm_node: connection's node
 168  * @event: upper layer's cm event
 169  */
 170 static inline void i40iw_fill_sockaddr4(struct i40iw_cm_node *cm_node,
 171                                         struct iw_cm_event *event)
 172 {
 173         struct sockaddr_in *laddr = (struct sockaddr_in *)&event->local_addr;
 174         struct sockaddr_in *raddr = (struct sockaddr_in *)&event->remote_addr;
 175
 176         laddr->sin_family = AF_INET;
 177         raddr->sin_family = AF_INET;
 178
 179         laddr->sin_port = htons(cm_node->loc_port);
 180         raddr->sin_port = htons(cm_node->rem_port);
 181
 182         laddr->sin_addr.s_addr = htonl(cm_node->loc_addr[0]);
 183         raddr->sin_addr.s_addr = htonl(cm_node->rem_addr[0]);
 184 }
 185
 186 /**
 187  * i40iw_fill_sockaddr6 - get ipv6 addr info for passive side
 188  * @cm_node: connection's node
 189  * @event: upper layer's cm event
 190  */
 191 static inline void i40iw_fill_sockaddr6(struct i40iw_cm_node *cm_node,
 192                                         struct iw_cm_event *event)
 193 {
 194         struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)&event->local_addr;
 195         struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)&event->remote_addr;
 196
 197         laddr6->sin6_family = AF_INET6;
 198         raddr6->sin6_family = AF_INET6;
 199
 200         laddr6->sin6_port = htons(cm_node->loc_port);
 201         raddr6->sin6_port = htons(cm_node->rem_port);
 202
 203         i40iw_copy_ip_htonl(laddr6->sin6_addr.in6_u.u6_addr32,
 204                             cm_node->loc_addr);
 205         i40iw_copy_ip_htonl(raddr6->sin6_addr.in6_u.u6_addr32,
 206                             cm_node->rem_addr);
 207 }
 208
 209 /**
 210  * i40iw_get_addr_info
 211  * @cm_node: contains ip/tcp info
 212  * @cm_info: to get a copy of the cm_node ip/tcp info
 213 */
 214 static void i40iw_get_addr_info(struct i40iw_cm_node *cm_node,
 215                                 struct i40iw_cm_info *cm_info)
 216 {
 217         cm_info->ipv4 = cm_node->ipv4;
 218         cm_info->vlan_id = cm_node->vlan_id;
 219         memcpy(cm_info->loc_addr, cm_node->loc_addr, sizeof(cm_info->loc_addr));
 220         memcpy(cm_info->rem_addr, cm_node->rem_addr, sizeof(cm_info->rem_addr));
 221         cm_info->loc_port = cm_node->loc_port;
 222         cm_info->rem_port = cm_node->rem_port;
 223         cm_info->user_pri = cm_node->user_pri;
 224 }
 225
 226 /**
 227  * i40iw_get_cmevent_info - for cm event upcall
 228  * @cm_node: connection's node
 229  * @cm_id: upper layers cm struct for the event
 230  * @event: upper layer's cm event
 231  */
 232 static inline void i40iw_get_cmevent_info(struct i40iw_cm_node *cm_node,
 233                                           struct iw_cm_id *cm_id,
 234                                           struct iw_cm_event *event)
 235 {
 236         memcpy(&event->local_addr, &cm_id->m_local_addr,
 237                sizeof(event->local_addr));
 238         memcpy(&event->remote_addr, &cm_id->m_remote_addr,
 239                sizeof(event->remote_addr));
 240         if (cm_node) {
 241                 event->private_data = (void *)cm_node->pdata_buf;
 242                 event->private_data_len = (u8)cm_node->pdata.size;
 243                 event->ird = cm_node->ird_size;
 244                 event->ord = cm_node->ord_size;
 245         }
 246 }
 247
 248 /**
 249  * i40iw_send_cm_event - upcall cm's event handler
 250  * @cm_node: connection's node
 251  * @cm_id: upper layer's cm info struct
 252  * @type: Event type to indicate
 253  * @status: status for the event type
 254  */
 255 static int i40iw_send_cm_event(struct i40iw_cm_node *cm_node,
 256                                struct iw_cm_id *cm_id,
 257                                enum iw_cm_event_type type,
 258                                int status)
 259 {
 260         struct iw_cm_event event;
 261
 262         memset(&event, 0, sizeof(event));
 263         event.event = type;
 264         event.status = status;
 265         switch (type) {
 266         case IW_CM_EVENT_CONNECT_REQUEST:
 267                 if (cm_node->ipv4)
 268                         i40iw_fill_sockaddr4(cm_node, &event);
 269                 else
 270                         i40iw_fill_sockaddr6(cm_node, &event);
 271                 event.provider_data = (void *)cm_node;
 272                 event.private_data = (void *)cm_node->pdata_buf;
 273                 event.private_data_len = (u8)cm_node->pdata.size;
 274                 event.ird = cm_node->ird_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_device *iwdev = cm_node->iwdev;
 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(&iwdev->vsi, (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_vsi *vsi = &cm_node->iwdev->vsi;
 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(vsi->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 = cm_node->tos;
 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->priority = cm_node->tos >> 4;
 476                 ip6h->flow_lbl[0] = cm_node->tos << 4;
 477                 ip6h->flow_lbl[1] = 0;
 478                 ip6h->flow_lbl[2] = 0;
 479                 ip6h->payload_len = htons(packetsize - sizeof(*ip6h));
 480                 ip6h->nexthdr = 6;
 481                 ip6h->hop_limit = 128;
 482                 i40iw_copy_ip_htonl(ip6h->saddr.in6_u.u6_addr32,
 483                                     cm_node->loc_addr);
 484                 i40iw_copy_ip_htonl(ip6h->daddr.in6_u.u6_addr32,
 485                                     cm_node->rem_addr);
 486         }
 487
 488         tcph->source = htons(cm_node->loc_port);
 489         tcph->dest = htons(cm_node->rem_port);
 490
 491         tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
 492
 493         if (flags & SET_ACK) {
 494                 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
 495                 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
 496                 tcph->ack = 1;
 497         } else {
 498                 tcph->ack_seq = 0;
 499         }
 500
 501         if (flags & SET_SYN) {
 502                 cm_node->tcp_cntxt.loc_seq_num++;
 503                 tcph->syn = 1;
 504         } else {
 505                 cm_node->tcp_cntxt.loc_seq_num += hdr_len + pd_len;
 506         }
 507
 508         if (flags & SET_FIN) {
 509                 cm_node->tcp_cntxt.loc_seq_num++;
 510                 tcph->fin = 1;
 511         }
 512
 513         if (flags & SET_RST)
 514                 tcph->rst = 1;
 515
 516         tcph->doff = (u16)((sizeof(*tcph) + opts_len + 3) >> 2);
 517         sqbuf->tcphlen = tcph->doff << 2;
 518         tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
 519         tcph->urg_ptr = 0;
 520
 521         if (opts_len) {
 522                 memcpy(buf, options->addr, opts_len);
 523                 buf += opts_len;
 524         }
 525
 526         if (hdr_len) {
 527                 memcpy(buf, hdr->addr, hdr_len);
 528                 buf += hdr_len;
 529         }
 530
 531         if (pdata && pdata->addr)
 532                 memcpy(buf, pdata->addr, pdata->size);
 533
 534         atomic_set(&sqbuf->refcount, 1);
 535
 536         return sqbuf;
 537 }
 538
 539 /**
 540  * i40iw_send_reset - Send RST packet
 541  * @cm_node: connection's node
 542  */
 543 int i40iw_send_reset(struct i40iw_cm_node *cm_node)
 544 {
 545         struct i40iw_puda_buf *sqbuf;
 546         int flags = SET_RST | SET_ACK;
 547
 548         sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, flags);
 549         if (!sqbuf) {
 550                 i40iw_pr_err("no sqbuf\n");
 551                 return -1;
 552         }
 553
 554         return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 0, 1);
 555 }
 556
 557 /**
 558  * i40iw_active_open_err - send event for active side cm error
 559  * @cm_node: connection's node
 560  * @reset: Flag to send reset or not
 561  */
 562 static void i40iw_active_open_err(struct i40iw_cm_node *cm_node, bool reset)
 563 {
 564         i40iw_cleanup_retrans_entry(cm_node);
 565         cm_node->cm_core->stats_connect_errs++;
 566         if (reset) {
 567                 i40iw_debug(cm_node->dev,
 568                             I40IW_DEBUG_CM,
 569                             "%s cm_node=%p state=%d\n",
 570                             __func__,
 571                             cm_node,
 572                             cm_node->state);
 573                 atomic_inc(&cm_node->ref_count);
 574                 i40iw_send_reset(cm_node);
 575         }
 576
 577         cm_node->state = I40IW_CM_STATE_CLOSED;
 578         i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
 579 }
 580
 581 /**
 582  * i40iw_passive_open_err - handle passive side cm error
 583  * @cm_node: connection's node
 584  * @reset: send reset or just free cm_node
 585  */
 586 static void i40iw_passive_open_err(struct i40iw_cm_node *cm_node, bool reset)
 587 {
 588         i40iw_cleanup_retrans_entry(cm_node);
 589         cm_node->cm_core->stats_passive_errs++;
 590         cm_node->state = I40IW_CM_STATE_CLOSED;
 591         i40iw_debug(cm_node->dev,
 592                     I40IW_DEBUG_CM,
 593                     "%s cm_node=%p state =%d\n",
 594                     __func__,
 595                     cm_node,
 596                     cm_node->state);
 597         if (reset)
 598                 i40iw_send_reset(cm_node);
 599         else
 600                 i40iw_rem_ref_cm_node(cm_node);
 601 }
 602
 603 /**
 604  * i40iw_event_connect_error - to create connect error event
 605  * @event: cm information for connect event
 606  */
 607 static void i40iw_event_connect_error(struct i40iw_cm_event *event)
 608 {
 609         struct i40iw_qp *iwqp;
 610         struct iw_cm_id *cm_id;
 611
 612         cm_id = event->cm_node->cm_id;
 613         if (!cm_id)
 614                 return;
 615
 616         iwqp = cm_id->provider_data;
 617
 618         if (!iwqp || !iwqp->iwdev)
 619                 return;
 620
 621         iwqp->cm_id = NULL;
 622         cm_id->provider_data = NULL;
 623         i40iw_send_cm_event(event->cm_node, cm_id,
 624                             IW_CM_EVENT_CONNECT_REPLY,
 625                             -ECONNRESET);
 626         cm_id->rem_ref(cm_id);
 627         i40iw_rem_ref_cm_node(event->cm_node);
 628 }
 629
 630 /**
 631  * i40iw_process_options
 632  * @cm_node: connection's node
 633  * @optionsloc: point to start of options
 634  * @optionsize: size of all options
 635  * @syn_packet: flag if syn packet
 636  */
 637 static int i40iw_process_options(struct i40iw_cm_node *cm_node,
 638                                  u8 *optionsloc,
 639                                  u32 optionsize,
 640                                  u32 syn_packet)
 641 {
 642         u32 tmp;
 643         u32 offset = 0;
 644         union all_known_options *all_options;
 645         char got_mss_option = 0;
 646
 647         while (offset < optionsize) {
 648                 all_options = (union all_known_options *)(optionsloc + offset);
 649                 switch (all_options->as_base.optionnum) {
 650                 case OPTION_NUMBER_END:
 651                         offset = optionsize;
 652                         break;
 653                 case OPTION_NUMBER_NONE:
 654                         offset += 1;
 655                         continue;
 656                 case OPTION_NUMBER_MSS:
 657                         i40iw_debug(cm_node->dev,
 658                                     I40IW_DEBUG_CM,
 659                                     "%s: MSS Length: %d Offset: %d Size: %d\n",
 660                                     __func__,
 661                                     all_options->as_mss.length,
 662                                     offset,
 663                                     optionsize);
 664                         got_mss_option = 1;
 665                         if (all_options->as_mss.length != 4)
 666                                 return -1;
 667                         tmp = ntohs(all_options->as_mss.mss);
 668                         if (tmp > 0 && tmp < cm_node->tcp_cntxt.mss)
 669                                 cm_node->tcp_cntxt.mss = tmp;
 670                         break;
 671                 case OPTION_NUMBER_WINDOW_SCALE:
 672                         cm_node->tcp_cntxt.snd_wscale =
 673                             all_options->as_windowscale.shiftcount;
 674                         break;
 675                 default:
 676                         i40iw_debug(cm_node->dev,
 677                                     I40IW_DEBUG_CM,
 678                                     "TCP Option not understood: %x\n",
 679                                     all_options->as_base.optionnum);
 680                         break;
 681                 }
 682                 offset += all_options->as_base.length;
 683         }
 684         if (!got_mss_option && syn_packet)
 685                 cm_node->tcp_cntxt.mss = I40IW_CM_DEFAULT_MSS;
 686         return 0;
 687 }
 688
 689 /**
 690  * i40iw_handle_tcp_options -
 691  * @cm_node: connection's node
 692  * @tcph: pointer tcp header
 693  * @optionsize: size of options rcvd
 694  * @passive: active or passive flag
 695  */
 696 static int i40iw_handle_tcp_options(struct i40iw_cm_node *cm_node,
 697                                     struct tcphdr *tcph,
 698                                     int optionsize,
 699                                     int passive)
 700 {
 701         u8 *optionsloc = (u8 *)&tcph[1];
 702
 703         if (optionsize) {
 704                 if (i40iw_process_options(cm_node,
 705                                           optionsloc,
 706                                           optionsize,
 707                                           (u32)tcph->syn)) {
 708                         i40iw_debug(cm_node->dev,
 709                                     I40IW_DEBUG_CM,
 710                                     "%s: Node %p, Sending RESET\n",
 711                                     __func__,
 712                                     cm_node);
 713                         if (passive)
 714                                 i40iw_passive_open_err(cm_node, true);
 715                         else
 716                                 i40iw_active_open_err(cm_node, true);
 717                         return -1;
 718                 }
 719         }
 720
 721         cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
 722             cm_node->tcp_cntxt.snd_wscale;
 723
 724         if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
 725                 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
 726         return 0;
 727 }
 728
 729 /**
 730  * i40iw_build_mpa_v1 - build a MPA V1 frame
 731  * @cm_node: connection's node
 732  * @mpa_key: to do read0 or write0
 733  */
 734 static void i40iw_build_mpa_v1(struct i40iw_cm_node *cm_node,
 735                                void *start_addr,
 736                                u8 mpa_key)
 737 {
 738         struct ietf_mpa_v1 *mpa_frame = (struct ietf_mpa_v1 *)start_addr;
 739
 740         switch (mpa_key) {
 741         case MPA_KEY_REQUEST:
 742                 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
 743                 break;
 744         case MPA_KEY_REPLY:
 745                 memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
 746                 break;
 747         default:
 748                 break;
 749         }
 750         mpa_frame->flags = IETF_MPA_FLAGS_CRC;
 751         mpa_frame->rev = cm_node->mpa_frame_rev;
 752         mpa_frame->priv_data_len = htons(cm_node->pdata.size);
 753 }
 754
 755 /**
 756  * i40iw_build_mpa_v2 - build a MPA V2 frame
 757  * @cm_node: connection's node
 758  * @start_addr: buffer start address
 759  * @mpa_key: to do read0 or write0
 760  */
 761 static void i40iw_build_mpa_v2(struct i40iw_cm_node *cm_node,
 762                                void *start_addr,
 763                                u8 mpa_key)
 764 {
 765         struct ietf_mpa_v2 *mpa_frame = (struct ietf_mpa_v2 *)start_addr;
 766         struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg;
 767         u16 ctrl_ird, ctrl_ord;
 768
 769         /* initialize the upper 5 bytes of the frame */
 770         i40iw_build_mpa_v1(cm_node, start_addr, mpa_key);
 771         mpa_frame->flags |= IETF_MPA_V2_FLAG;
 772         mpa_frame->priv_data_len += htons(IETF_RTR_MSG_SIZE);
 773
 774         /* initialize RTR msg */
 775         if (cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) {
 776                 ctrl_ird = IETF_NO_IRD_ORD;
 777                 ctrl_ord = IETF_NO_IRD_ORD;
 778         } else {
 779                 ctrl_ird = (cm_node->ird_size > IETF_NO_IRD_ORD) ?
 780                         IETF_NO_IRD_ORD : cm_node->ird_size;
 781                 ctrl_ord = (cm_node->ord_size > IETF_NO_IRD_ORD) ?
 782                         IETF_NO_IRD_ORD : cm_node->ord_size;
 783         }
 784
 785         ctrl_ird |= IETF_PEER_TO_PEER;
 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 is send or 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_vsi *vsi = &cm_node->iwdev->vsi;
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                 if (type != I40IW_TIMER_TYPE_CLOSE)
1070                         i40iw_free_sqbuf(vsi, (void *)sqbuf);
1071                 return -ENOMEM;
1072         }
1073         new_send->retrycount = I40IW_DEFAULT_RETRYS;
1074         new_send->retranscount = I40IW_DEFAULT_RETRANS;
1075         new_send->sqbuf = sqbuf;
1076         new_send->timetosend = jiffies;
1077         new_send->type = type;
1078         new_send->send_retrans = send_retrans;
1079         new_send->close_when_complete = close_when_complete;
1080
1081         if (type == I40IW_TIMER_TYPE_CLOSE) {
1082                 new_send->timetosend += (HZ / 10);
1083                 if (cm_node->close_entry) {
1084                         kfree(new_send);
1085                         i40iw_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(vsi->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_build_timer_list - Add cm_nodes to timer list
1188  * @timer_list: ptr to timer list
1189  * @hte: ptr to accelerated or non-accelerated list
1190  */
1191 static void i40iw_build_timer_list(struct list_head *timer_list,
1192                                    struct list_head *hte)
1193 {
1194         struct i40iw_cm_node *cm_node;
1195         struct list_head *list_core_temp, *list_node;
1196
1197         list_for_each_safe(list_node, list_core_temp, hte) {
1198                 cm_node = container_of(list_node, struct i40iw_cm_node, list);
1199                 if (cm_node->close_entry || cm_node->send_entry) {
1200                         atomic_inc(&cm_node->ref_count);
1201                         list_add(&cm_node->timer_entry, timer_list);
1202                 }
1203         }
1204 }
1205
1206 /**
1207  * i40iw_cm_timer_tick - system's timer expired callback
1208  * @pass: Pointing to cm_core
1209  */
1210 static void i40iw_cm_timer_tick(struct timer_list *t)
1211 {
1212         unsigned long nexttimeout = jiffies + I40IW_LONG_TIME;
1213         struct i40iw_cm_node *cm_node;
1214         struct i40iw_timer_entry *send_entry, *close_entry;
1215         struct list_head *list_core_temp;
1216         struct i40iw_sc_vsi *vsi;
1217         struct list_head *list_node;
1218         struct i40iw_cm_core *cm_core = from_timer(cm_core, t, tcp_timer);
1219         u32 settimer = 0;
1220         unsigned long timetosend;
1221         unsigned long flags;
1222
1223         struct list_head timer_list;
1224
1225         INIT_LIST_HEAD(&timer_list);
1226
1227         spin_lock_irqsave(&cm_core->ht_lock, flags);
1228         i40iw_build_timer_list(&timer_list, &cm_core->non_accelerated_list);
1229         i40iw_build_timer_list(&timer_list, &cm_core->accelerated_list);
1230         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1231
1232         list_for_each_safe(list_node, list_core_temp, &timer_list) {
1233                 cm_node = container_of(list_node,
1234                                        struct i40iw_cm_node,
1235                                        timer_entry);
1236                 close_entry = cm_node->close_entry;
1237
1238                 if (close_entry) {
1239                         if (time_after(close_entry->timetosend, jiffies)) {
1240                                 if (nexttimeout > close_entry->timetosend ||
1241                                     !settimer) {
1242                                         nexttimeout = close_entry->timetosend;
1243                                         settimer = 1;
1244                                 }
1245                         } else {
1246                                 i40iw_handle_close_entry(cm_node, 1);
1247                         }
1248                 }
1249
1250                 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1251
1252                 send_entry = cm_node->send_entry;
1253                 if (!send_entry)
1254                         goto done;
1255                 if (time_after(send_entry->timetosend, jiffies)) {
1256                         if (cm_node->state != I40IW_CM_STATE_OFFLOADED) {
1257                                 if ((nexttimeout > send_entry->timetosend) ||
1258                                     !settimer) {
1259                                         nexttimeout = send_entry->timetosend;
1260                                         settimer = 1;
1261                                 }
1262                         } else {
1263                                 i40iw_free_retrans_entry(cm_node);
1264                         }
1265                         goto done;
1266                 }
1267
1268                 if ((cm_node->state == I40IW_CM_STATE_OFFLOADED) ||
1269                     (cm_node->state == I40IW_CM_STATE_CLOSED)) {
1270                         i40iw_free_retrans_entry(cm_node);
1271                         goto done;
1272                 }
1273
1274                 if (!send_entry->retranscount || !send_entry->retrycount) {
1275                         i40iw_free_retrans_entry(cm_node);
1276
1277                         spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1278                         i40iw_retrans_expired(cm_node);
1279                         cm_node->state = I40IW_CM_STATE_CLOSED;
1280                         spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1281                         goto done;
1282                 }
1283                 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1284
1285                 vsi = &cm_node->iwdev->vsi;
1286
1287                 if (!cm_node->ack_rcvd) {
1288                         atomic_inc(&send_entry->sqbuf->refcount);
1289                         i40iw_puda_send_buf(vsi->ilq, send_entry->sqbuf);
1290                         cm_node->cm_core->stats_pkt_retrans++;
1291                 }
1292                 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1293                 if (send_entry->send_retrans) {
1294                         send_entry->retranscount--;
1295                         timetosend = (I40IW_RETRY_TIMEOUT <<
1296                                       (I40IW_DEFAULT_RETRANS -
1297                                        send_entry->retranscount));
1298
1299                         send_entry->timetosend = jiffies +
1300                             min(timetosend, I40IW_MAX_TIMEOUT);
1301                         if (nexttimeout > send_entry->timetosend || !settimer) {
1302                                 nexttimeout = send_entry->timetosend;
1303                                 settimer = 1;
1304                         }
1305                 } else {
1306                         int close_when_complete;
1307
1308                         close_when_complete = send_entry->close_when_complete;
1309                         i40iw_debug(cm_node->dev,
1310                                     I40IW_DEBUG_CM,
1311                                     "cm_node=%p state=%d\n",
1312                                     cm_node,
1313                                     cm_node->state);
1314                         i40iw_free_retrans_entry(cm_node);
1315                         if (close_when_complete)
1316                                 i40iw_rem_ref_cm_node(cm_node);
1317                 }
1318 done:
1319                 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1320                 i40iw_rem_ref_cm_node(cm_node);
1321         }
1322
1323         if (settimer) {
1324                 spin_lock_irqsave(&cm_core->ht_lock, flags);
1325                 if (!timer_pending(&cm_core->tcp_timer)) {
1326                         cm_core->tcp_timer.expires = nexttimeout;
1327                         add_timer(&cm_core->tcp_timer);
1328                 }
1329                 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1330         }
1331 }
1332
1333 /**
1334  * i40iw_send_syn - send SYN packet
1335  * @cm_node: connection's node
1336  * @sendack: flag to set ACK bit or not
1337  */
1338 int i40iw_send_syn(struct i40iw_cm_node *cm_node, u32 sendack)
1339 {
1340         struct i40iw_puda_buf *sqbuf;
1341         int flags = SET_SYN;
1342         char optionsbuffer[sizeof(struct option_mss) +
1343                            sizeof(struct option_windowscale) +
1344                            sizeof(struct option_base) + TCP_OPTIONS_PADDING];
1345         struct i40iw_kmem_info opts;
1346
1347         int optionssize = 0;
1348         /* Sending MSS option */
1349         union all_known_options *options;
1350
1351         opts.addr = optionsbuffer;
1352         if (!cm_node) {
1353                 i40iw_pr_err("no cm_node\n");
1354                 return -EINVAL;
1355         }
1356
1357         options = (union all_known_options *)&optionsbuffer[optionssize];
1358         options->as_mss.optionnum = OPTION_NUMBER_MSS;
1359         options->as_mss.length = sizeof(struct option_mss);
1360         options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
1361         optionssize += sizeof(struct option_mss);
1362
1363         options = (union all_known_options *)&optionsbuffer[optionssize];
1364         options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
1365         options->as_windowscale.length = sizeof(struct option_windowscale);
1366         options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
1367         optionssize += sizeof(struct option_windowscale);
1368         options = (union all_known_options *)&optionsbuffer[optionssize];
1369         options->as_end = OPTION_NUMBER_END;
1370         optionssize += 1;
1371
1372         if (sendack)
1373                 flags |= SET_ACK;
1374
1375         opts.size = optionssize;
1376
1377         sqbuf = i40iw_form_cm_frame(cm_node, &opts, NULL, NULL, flags);
1378         if (!sqbuf) {
1379                 i40iw_pr_err("no sqbuf\n");
1380                 return -1;
1381         }
1382         return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
1383 }
1384
1385 /**
1386  * i40iw_send_ack - Send ACK packet
1387  * @cm_node: connection's node
1388  */
1389 static void i40iw_send_ack(struct i40iw_cm_node *cm_node)
1390 {
1391         struct i40iw_puda_buf *sqbuf;
1392         struct i40iw_sc_vsi *vsi = &cm_node->iwdev->vsi;
1393
1394         sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK);
1395         if (sqbuf)
1396                 i40iw_puda_send_buf(vsi->ilq, sqbuf);
1397         else
1398                 i40iw_pr_err("no sqbuf\n");
1399 }
1400
1401 /**
1402  * i40iw_send_fin - Send FIN pkt
1403  * @cm_node: connection's node
1404  */
1405 static int i40iw_send_fin(struct i40iw_cm_node *cm_node)
1406 {
1407         struct i40iw_puda_buf *sqbuf;
1408
1409         sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK | SET_FIN);
1410         if (!sqbuf) {
1411                 i40iw_pr_err("no sqbuf\n");
1412                 return -1;
1413         }
1414         return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
1415 }
1416
1417 /**
1418  * i40iw_find_node - find a cm node that matches the reference cm node
1419  * @cm_core: cm's core
1420  * @rem_port: remote tcp port num
1421  * @rem_addr: remote ip addr
1422  * @loc_port: local tcp port num
1423  * @loc_addr: loc ip addr
1424  * @add_refcnt: flag to increment refcount of cm_node
1425  * @accelerated_list: flag for accelerated vs non-accelerated list to search
1426  */
1427 struct i40iw_cm_node *i40iw_find_node(struct i40iw_cm_core *cm_core,
1428                                       u16 rem_port,
1429                                       u32 *rem_addr,
1430                                       u16 loc_port,
1431                                       u32 *loc_addr,
1432                                       bool add_refcnt,
1433                                       bool accelerated_list)
1434 {
1435         struct list_head *hte;
1436         struct i40iw_cm_node *cm_node;
1437         unsigned long flags;
1438
1439         hte = accelerated_list ?
1440               &cm_core->accelerated_list : &cm_core->non_accelerated_list;
1441
1442         /* walk list and find cm_node associated with this session ID */
1443         spin_lock_irqsave(&cm_core->ht_lock, flags);
1444         list_for_each_entry(cm_node, hte, list) {
1445                 if (!memcmp(cm_node->loc_addr, loc_addr, sizeof(cm_node->loc_addr)) &&
1446                     (cm_node->loc_port == loc_port) &&
1447                     !memcmp(cm_node->rem_addr, rem_addr, sizeof(cm_node->rem_addr)) &&
1448                     (cm_node->rem_port == rem_port)) {
1449                         if (add_refcnt)
1450                                 atomic_inc(&cm_node->ref_count);
1451                         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1452                         return cm_node;
1453                 }
1454         }
1455         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1456
1457         /* no owner node */
1458         return NULL;
1459 }
1460
1461 /**
1462  * i40iw_find_listener - find a cm node listening on this addr-port pair
1463  * @cm_core: cm's core
1464  * @dst_port: listener tcp port num
1465  * @dst_addr: listener ip addr
1466  * @listener_state: state to match with listen node's
1467  */
1468 static struct i40iw_cm_listener *i40iw_find_listener(
1469                                                      struct i40iw_cm_core *cm_core,
1470                                                      u32 *dst_addr,
1471                                                      u16 dst_port,
1472                                                      u16 vlan_id,
1473                                                      enum i40iw_cm_listener_state
1474                                                      listener_state)
1475 {
1476         struct i40iw_cm_listener *listen_node;
1477         static const u32 ip_zero[4] = { 0, 0, 0, 0 };
1478         u32 listen_addr[4];
1479         u16 listen_port;
1480         unsigned long flags;
1481
1482         /* walk list and find cm_node associated with this session ID */
1483         spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1484         list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
1485                 memcpy(listen_addr, listen_node->loc_addr, sizeof(listen_addr));
1486                 listen_port = listen_node->loc_port;
1487                 /* compare node pair, return node handle if a match */
1488                 if ((!memcmp(listen_addr, dst_addr, sizeof(listen_addr)) ||
1489                      !memcmp(listen_addr, ip_zero, sizeof(listen_addr))) &&
1490                      (listen_port == dst_port) &&
1491                      (listener_state & listen_node->listener_state)) {
1492                         atomic_inc(&listen_node->ref_count);
1493                         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1494                         return listen_node;
1495                 }
1496         }
1497         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1498         return NULL;
1499 }
1500
1501 /**
1502  * i40iw_add_hte_node - add a cm node to the hash table
1503  * @cm_core: cm's core
1504  * @cm_node: connection's node
1505  */
1506 static void i40iw_add_hte_node(struct i40iw_cm_core *cm_core,
1507                                struct i40iw_cm_node *cm_node)
1508 {
1509         unsigned long flags;
1510
1511         if (!cm_node || !cm_core) {
1512                 i40iw_pr_err("cm_node or cm_core == NULL\n");
1513                 return;
1514         }
1515
1516         spin_lock_irqsave(&cm_core->ht_lock, flags);
1517         list_add_tail(&cm_node->list, &cm_core->non_accelerated_list);
1518         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1519 }
1520
1521 /**
1522  * i40iw_find_port - find port that matches reference port
1523  * @hte: ptr to accelerated or non-accelerated list
1524  * @accelerated_list: flag for accelerated vs non-accelerated list
1525  */
1526 static bool i40iw_find_port(struct list_head *hte, u16 port)
1527 {
1528         struct i40iw_cm_node *cm_node;
1529
1530         list_for_each_entry(cm_node, hte, list) {
1531                 if (cm_node->loc_port == port)
1532                         return true;
1533         }
1534         return false;
1535 }
1536
1537 /**
1538  * i40iw_port_in_use - determine if port is in use
1539  * @cm_core: cm's core
1540  * @port: port number
1541  */
1542 bool i40iw_port_in_use(struct i40iw_cm_core *cm_core, u16 port)
1543 {
1544         struct i40iw_cm_listener *listen_node;
1545         unsigned long flags;
1546
1547         spin_lock_irqsave(&cm_core->ht_lock, flags);
1548         if (i40iw_find_port(&cm_core->accelerated_list, port) ||
1549             i40iw_find_port(&cm_core->non_accelerated_list, port)) {
1550                 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1551                 return true;
1552         }
1553         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1554
1555         spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1556         list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
1557                 if (listen_node->loc_port == port) {
1558                         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1559                         return true;
1560                 }
1561         }
1562         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1563
1564         return false;
1565 }
1566
1567 /**
1568  * i40iw_del_multiple_qhash - Remove qhash and child listens
1569  * @iwdev: iWarp device
1570  * @cm_info: CM info for parent listen node
1571  * @cm_parent_listen_node: The parent listen node
1572  */
1573 static enum i40iw_status_code i40iw_del_multiple_qhash(
1574                                                        struct i40iw_device *iwdev,
1575                                                        struct i40iw_cm_info *cm_info,
1576                                                        struct i40iw_cm_listener *cm_parent_listen_node)
1577 {
1578         struct i40iw_cm_listener *child_listen_node;
1579         enum i40iw_status_code ret = I40IW_ERR_CONFIG;
1580         struct list_head *pos, *tpos;
1581         unsigned long flags;
1582
1583         spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1584         list_for_each_safe(pos, tpos, &cm_parent_listen_node->child_listen_list) {
1585                 child_listen_node = list_entry(pos, struct i40iw_cm_listener, child_listen_list);
1586                 if (child_listen_node->ipv4)
1587                         i40iw_debug(&iwdev->sc_dev,
1588                                     I40IW_DEBUG_CM,
1589                                     "removing child listen for IP=%pI4, port=%d, vlan=%d\n",
1590                                     child_listen_node->loc_addr,
1591                                     child_listen_node->loc_port,
1592                                     child_listen_node->vlan_id);
1593                 else
1594                         i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM,
1595                                     "removing child listen for IP=%pI6, port=%d, vlan=%d\n",
1596                                     child_listen_node->loc_addr,
1597                                     child_listen_node->loc_port,
1598                                     child_listen_node->vlan_id);
1599                 list_del(pos);
1600                 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1601                        sizeof(cm_info->loc_addr));
1602                 cm_info->vlan_id = child_listen_node->vlan_id;
1603                 if (child_listen_node->qhash_set) {
1604                         ret = i40iw_manage_qhash(iwdev, cm_info,
1605                                                  I40IW_QHASH_TYPE_TCP_SYN,
1606                                                  I40IW_QHASH_MANAGE_TYPE_DELETE,
1607                                                  NULL, false);
1608                         child_listen_node->qhash_set = false;
1609                 } else {
1610                         ret = I40IW_SUCCESS;
1611                 }
1612                 i40iw_debug(&iwdev->sc_dev,
1613                             I40IW_DEBUG_CM,
1614                             "freed pointer = %p\n",
1615                             child_listen_node);
1616                 kfree(child_listen_node);
1617                 cm_parent_listen_node->cm_core->stats_listen_nodes_destroyed++;
1618         }
1619         spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1620
1621         return ret;
1622 }
1623
1624 /**
1625  * i40iw_netdev_vlan_ipv6 - Gets the netdev and vlan
1626  * @addr: local IPv6 address
1627  * @vlan_id: vlan id for the given IPv6 address
1628  *
1629  * Returns the net_device of the IPv6 address and also sets the
1630  * vlan id for that address.
1631  */
1632 static struct net_device *i40iw_netdev_vlan_ipv6(u32 *addr, u16 *vlan_id)
1633 {
1634         struct net_device *ip_dev = NULL;
1635         struct in6_addr laddr6;
1636
1637         if (!IS_ENABLED(CONFIG_IPV6))
1638                 return NULL;
1639         i40iw_copy_ip_htonl(laddr6.in6_u.u6_addr32, addr);
1640         if (vlan_id)
1641                 *vlan_id = I40IW_NO_VLAN;
1642         rcu_read_lock();
1643         for_each_netdev_rcu(&init_net, ip_dev) {
1644                 if (ipv6_chk_addr(&init_net, &laddr6, ip_dev, 1)) {
1645                         if (vlan_id)
1646                                 *vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1647                         break;
1648                 }
1649         }
1650         rcu_read_unlock();
1651         return ip_dev;
1652 }
1653
1654 /**
1655  * i40iw_get_vlan_ipv4 - Returns the vlan_id for IPv4 address
1656  * @addr: local IPv4 address
1657  */
1658 static u16 i40iw_get_vlan_ipv4(u32 *addr)
1659 {
1660         struct net_device *netdev;
1661         u16 vlan_id = I40IW_NO_VLAN;
1662
1663         netdev = ip_dev_find(&init_net, htonl(addr[0]));
1664         if (netdev) {
1665                 vlan_id = rdma_vlan_dev_vlan_id(netdev);
1666                 dev_put(netdev);
1667         }
1668         return vlan_id;
1669 }
1670
1671 /**
1672  * i40iw_add_mqh_6 - Adds multiple qhashes for IPv6
1673  * @iwdev: iWarp device
1674  * @cm_info: CM info for parent listen node
1675  * @cm_parent_listen_node: The parent listen node
1676  *
1677  * Adds a qhash and a child listen node for every IPv6 address
1678  * on the adapter and adds the associated qhash filter
1679  */
1680 static enum i40iw_status_code i40iw_add_mqh_6(struct i40iw_device *iwdev,
1681                                               struct i40iw_cm_info *cm_info,
1682                                               struct i40iw_cm_listener *cm_parent_listen_node)
1683 {
1684         struct net_device *ip_dev;
1685         struct inet6_dev *idev;
1686         struct inet6_ifaddr *ifp, *tmp;
1687         enum i40iw_status_code ret = 0;
1688         struct i40iw_cm_listener *child_listen_node;
1689         unsigned long flags;
1690
1691         rtnl_lock();
1692         for_each_netdev(&init_net, ip_dev) {
1693                 if ((((rdma_vlan_dev_vlan_id(ip_dev) < I40IW_NO_VLAN) &&
1694                       (rdma_vlan_dev_real_dev(ip_dev) == iwdev->netdev)) ||
1695                      (ip_dev == iwdev->netdev)) && (ip_dev->flags & IFF_UP)) {
1696                         idev = __in6_dev_get(ip_dev);
1697                         if (!idev) {
1698                                 i40iw_pr_err("idev == NULL\n");
1699                                 break;
1700                         }
1701                         list_for_each_entry_safe(ifp, tmp, &idev->addr_list, if_list) {
1702                                 i40iw_debug(&iwdev->sc_dev,
1703                                             I40IW_DEBUG_CM,
1704                                             "IP=%pI6, vlan_id=%d, MAC=%pM\n",
1705                                             &ifp->addr,
1706                                             rdma_vlan_dev_vlan_id(ip_dev),
1707                                             ip_dev->dev_addr);
1708                                 child_listen_node =
1709                                         kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
1710                                 i40iw_debug(&iwdev->sc_dev,
1711                                             I40IW_DEBUG_CM,
1712                                             "Allocating child listener %p\n",
1713                                             child_listen_node);
1714                                 if (!child_listen_node) {
1715                                         ret = I40IW_ERR_NO_MEMORY;
1716                                         goto exit;
1717                                 }
1718                                 cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1719                                 cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1720
1721                                 memcpy(child_listen_node, cm_parent_listen_node,
1722                                        sizeof(*child_listen_node));
1723
1724                                 i40iw_copy_ip_ntohl(child_listen_node->loc_addr,
1725                                                     ifp->addr.in6_u.u6_addr32);
1726                                 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1727                                        sizeof(cm_info->loc_addr));
1728
1729                                 ret = i40iw_manage_qhash(iwdev, cm_info,
1730                                                          I40IW_QHASH_TYPE_TCP_SYN,
1731                                                          I40IW_QHASH_MANAGE_TYPE_ADD,
1732                                                          NULL, true);
1733                                 if (!ret) {
1734                                         child_listen_node->qhash_set = true;
1735                                         spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1736                                         list_add(&child_listen_node->child_listen_list,
1737                                                  &cm_parent_listen_node->child_listen_list);
1738                                         spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1739                                         cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
1740                                 } else {
1741                                         kfree(child_listen_node);
1742                                 }
1743                         }
1744                 }
1745         }
1746 exit:
1747         rtnl_unlock();
1748         return ret;
1749 }
1750
1751 /**
1752  * i40iw_add_mqh_4 - Adds multiple qhashes for IPv4
1753  * @iwdev: iWarp device
1754  * @cm_info: CM info for parent listen node
1755  * @cm_parent_listen_node: The parent listen node
1756  *
1757  * Adds a qhash and a child listen node for every IPv4 address
1758  * on the adapter and adds the associated qhash filter
1759  */
1760 static enum i40iw_status_code i40iw_add_mqh_4(
1761                                 struct i40iw_device *iwdev,
1762                                 struct i40iw_cm_info *cm_info,
1763                                 struct i40iw_cm_listener *cm_parent_listen_node)
1764 {
1765         struct net_device *dev;
1766         struct in_device *idev;
1767         struct i40iw_cm_listener *child_listen_node;
1768         enum i40iw_status_code ret = 0;
1769         unsigned long flags;
1770
1771         rtnl_lock();
1772         for_each_netdev(&init_net, dev) {
1773                 if ((((rdma_vlan_dev_vlan_id(dev) < I40IW_NO_VLAN) &&
1774                       (rdma_vlan_dev_real_dev(dev) == iwdev->netdev)) ||
1775                     (dev == iwdev->netdev)) && (dev->flags & IFF_UP)) {
1776                         idev = in_dev_get(dev);
1777                         for_ifa(idev) {
1778                                 i40iw_debug(&iwdev->sc_dev,
1779                                             I40IW_DEBUG_CM,
1780                                             "Allocating child CM Listener forIP=%pI4, vlan_id=%d, MAC=%pM\n",
1781                                             &ifa->ifa_address,
1782                                             rdma_vlan_dev_vlan_id(dev),
1783                                             dev->dev_addr);
1784                                 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_KERNEL);
1785                                 cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
1786                                 i40iw_debug(&iwdev->sc_dev,
1787                                             I40IW_DEBUG_CM,
1788                                             "Allocating child listener %p\n",
1789                                             child_listen_node);
1790                                 if (!child_listen_node) {
1791                                         in_dev_put(idev);
1792                                         ret = I40IW_ERR_NO_MEMORY;
1793                                         goto exit;
1794                                 }
1795                                 cm_info->vlan_id = rdma_vlan_dev_vlan_id(dev);
1796                                 cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1797                                 memcpy(child_listen_node,
1798                                        cm_parent_listen_node,
1799                                        sizeof(*child_listen_node));
1800
1801                                 child_listen_node->loc_addr[0] = ntohl(ifa->ifa_address);
1802                                 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1803                                        sizeof(cm_info->loc_addr));
1804
1805                                 ret = i40iw_manage_qhash(iwdev,
1806                                                          cm_info,
1807                                                          I40IW_QHASH_TYPE_TCP_SYN,
1808                                                          I40IW_QHASH_MANAGE_TYPE_ADD,
1809                                                          NULL,
1810                                                          true);
1811                                 if (!ret) {
1812                                         child_listen_node->qhash_set = true;
1813                                         spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1814                                         list_add(&child_listen_node->child_listen_list,
1815                                                  &cm_parent_listen_node->child_listen_list);
1816                                         spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1817                                 } else {
1818                                         kfree(child_listen_node);
1819                                         cm_parent_listen_node->cm_core->stats_listen_nodes_created--;
1820                                 }
1821                         }
1822                         endfor_ifa(idev);
1823                         in_dev_put(idev);
1824                 }
1825         }
1826 exit:
1827         rtnl_unlock();
1828         return ret;
1829 }
1830
1831 /**
1832  * i40iw_dec_refcnt_listen - delete listener and associated cm nodes
1833  * @cm_core: cm's core
1834  * @free_hanging_nodes: to free associated cm_nodes
1835  * @apbvt_del: flag to delete the apbvt
1836  */
1837 static int i40iw_dec_refcnt_listen(struct i40iw_cm_core *cm_core,
1838                                    struct i40iw_cm_listener *listener,
1839                                    int free_hanging_nodes, bool apbvt_del)
1840 {
1841         int ret = -EINVAL;
1842         int err = 0;
1843         struct list_head *list_pos;
1844         struct list_head *list_temp;
1845         struct i40iw_cm_node *cm_node;
1846         struct list_head reset_list;
1847         struct i40iw_cm_info nfo;
1848         struct i40iw_cm_node *loopback;
1849         enum i40iw_cm_node_state old_state;
1850         unsigned long flags;
1851
1852         /* free non-accelerated child nodes for this listener */
1853         INIT_LIST_HEAD(&reset_list);
1854         if (free_hanging_nodes) {
1855                 spin_lock_irqsave(&cm_core->ht_lock, flags);
1856                 list_for_each_safe(list_pos,
1857                                    list_temp, &cm_core->non_accelerated_list) {
1858                         cm_node = container_of(list_pos, struct i40iw_cm_node, list);
1859                         if ((cm_node->listener == listener) &&
1860                             !cm_node->accelerated) {
1861                                 atomic_inc(&cm_node->ref_count);
1862                                 list_add(&cm_node->reset_entry, &reset_list);
1863                         }
1864                 }
1865                 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1866         }
1867
1868         list_for_each_safe(list_pos, list_temp, &reset_list) {
1869                 cm_node = container_of(list_pos, struct i40iw_cm_node, reset_entry);
1870                 loopback = cm_node->loopbackpartner;
1871                 if (cm_node->state >= I40IW_CM_STATE_FIN_WAIT1) {
1872                         i40iw_rem_ref_cm_node(cm_node);
1873                 } else {
1874                         if (!loopback) {
1875                                 i40iw_cleanup_retrans_entry(cm_node);
1876                                 err = i40iw_send_reset(cm_node);
1877                                 if (err) {
1878                                         cm_node->state = I40IW_CM_STATE_CLOSED;
1879                                         i40iw_pr_err("send reset\n");
1880                                 } else {
1881                                         old_state = cm_node->state;
1882                                         cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED;
1883                                         if (old_state != I40IW_CM_STATE_MPAREQ_RCVD)
1884                                                 i40iw_rem_ref_cm_node(cm_node);
1885                                 }
1886                         } else {
1887                                 struct i40iw_cm_event event;
1888
1889                                 event.cm_node = loopback;
1890                                 memcpy(event.cm_info.rem_addr,
1891                                        loopback->rem_addr, sizeof(event.cm_info.rem_addr));
1892                                 memcpy(event.cm_info.loc_addr,
1893                                        loopback->loc_addr, sizeof(event.cm_info.loc_addr));
1894                                 event.cm_info.rem_port = loopback->rem_port;
1895                                 event.cm_info.loc_port = loopback->loc_port;
1896                                 event.cm_info.cm_id = loopback->cm_id;
1897                                 event.cm_info.ipv4 = loopback->ipv4;
1898                                 atomic_inc(&loopback->ref_count);
1899                                 loopback->state = I40IW_CM_STATE_CLOSED;
1900                                 i40iw_event_connect_error(&event);
1901                                 cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED;
1902                                 i40iw_rem_ref_cm_node(cm_node);
1903                         }
1904                 }
1905         }
1906
1907         if (!atomic_dec_return(&listener->ref_count)) {
1908                 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1909                 list_del(&listener->list);
1910                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1911
1912                 if (listener->iwdev) {
1913                         if (apbvt_del)
1914                                 i40iw_manage_apbvt(listener->iwdev,
1915                                                    listener->loc_port,
1916                                                    I40IW_MANAGE_APBVT_DEL);
1917
1918                         memcpy(nfo.loc_addr, listener->loc_addr, sizeof(nfo.loc_addr));
1919                         nfo.loc_port = listener->loc_port;
1920                         nfo.ipv4 = listener->ipv4;
1921                         nfo.vlan_id = listener->vlan_id;
1922                         nfo.user_pri = listener->user_pri;
1923
1924                         if (!list_empty(&listener->child_listen_list)) {
1925                                 i40iw_del_multiple_qhash(listener->iwdev, &nfo, listener);
1926                         } else {
1927                                 if (listener->qhash_set)
1928                                         i40iw_manage_qhash(listener->iwdev,
1929                                                            &nfo,
1930                                                            I40IW_QHASH_TYPE_TCP_SYN,
1931                                                            I40IW_QHASH_MANAGE_TYPE_DELETE,
1932                                                            NULL,
1933                                                            false);
1934                         }
1935                 }
1936
1937                 cm_core->stats_listen_destroyed++;
1938                 kfree(listener);
1939                 cm_core->stats_listen_nodes_destroyed++;
1940                 listener = NULL;
1941                 ret = 0;
1942         }
1943
1944         if (listener) {
1945                 if (atomic_read(&listener->pend_accepts_cnt) > 0)
1946                         i40iw_debug(cm_core->dev,
1947                                     I40IW_DEBUG_CM,
1948                                     "%s: listener (%p) pending accepts=%u\n",
1949                                     __func__,
1950                                     listener,
1951                                     atomic_read(&listener->pend_accepts_cnt));
1952         }
1953
1954         return ret;
1955 }
1956
1957 /**
1958  * i40iw_cm_del_listen - delete a linstener
1959  * @cm_core: cm's core
1960   * @listener: passive connection's listener
1961  * @apbvt_del: flag to delete apbvt
1962  */
1963 static int i40iw_cm_del_listen(struct i40iw_cm_core *cm_core,
1964                                struct i40iw_cm_listener *listener,
1965                                bool apbvt_del)
1966 {
1967         listener->listener_state = I40IW_CM_LISTENER_PASSIVE_STATE;
1968         listener->cm_id = NULL; /* going to be destroyed pretty soon */
1969         return i40iw_dec_refcnt_listen(cm_core, listener, 1, apbvt_del);
1970 }
1971
1972 /**
1973  * i40iw_addr_resolve_neigh - resolve neighbor address
1974  * @iwdev: iwarp device structure
1975  * @src_ip: local ip address
1976  * @dst_ip: remote ip address
1977  * @arpindex: if there is an arp entry
1978  */
1979 static int i40iw_addr_resolve_neigh(struct i40iw_device *iwdev,
1980                                     u32 src_ip,
1981                                     u32 dst_ip,
1982                                     int arpindex)
1983 {
1984         struct rtable *rt;
1985         struct neighbour *neigh;
1986         int rc = arpindex;
1987         __be32 dst_ipaddr = htonl(dst_ip);
1988         __be32 src_ipaddr = htonl(src_ip);
1989
1990         rt = ip_route_output(&init_net, dst_ipaddr, src_ipaddr, 0, 0);
1991         if (IS_ERR(rt)) {
1992                 i40iw_pr_err("ip_route_output\n");
1993                 return rc;
1994         }
1995
1996         neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr);
1997
1998         rcu_read_lock();
1999         if (neigh) {
2000                 if (neigh->nud_state & NUD_VALID) {
2001                         if (arpindex >= 0) {
2002                                 if (ether_addr_equal(iwdev->arp_table[arpindex].mac_addr,
2003                                                      neigh->ha))
2004                                         /* Mac address same as arp table */
2005                                         goto resolve_neigh_exit;
2006                                 i40iw_manage_arp_cache(iwdev,
2007                                                        iwdev->arp_table[arpindex].mac_addr,
2008                                                        &dst_ip,
2009                                                        true,
2010                                                        I40IW_ARP_DELETE);
2011                         }
2012
2013                         i40iw_manage_arp_cache(iwdev, neigh->ha, &dst_ip, true, I40IW_ARP_ADD);
2014                         rc = i40iw_arp_table(iwdev, &dst_ip, true, NULL, I40IW_ARP_RESOLVE);
2015                 } else {
2016                         neigh_event_send(neigh, NULL);
2017                 }
2018         }
2019  resolve_neigh_exit:
2020
2021         rcu_read_unlock();
2022         if (neigh)
2023                 neigh_release(neigh);
2024
2025         ip_rt_put(rt);
2026         return rc;
2027 }
2028
2029 /**
2030  * i40iw_get_dst_ipv6
2031  */
2032 static struct dst_entry *i40iw_get_dst_ipv6(struct sockaddr_in6 *src_addr,
2033                                             struct sockaddr_in6 *dst_addr)
2034 {
2035         struct dst_entry *dst;
2036         struct flowi6 fl6;
2037
2038         memset(&fl6, 0, sizeof(fl6));
2039         fl6.daddr = dst_addr->sin6_addr;
2040         fl6.saddr = src_addr->sin6_addr;
2041         if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
2042                 fl6.flowi6_oif = dst_addr->sin6_scope_id;
2043
2044         dst = ip6_route_output(&init_net, NULL, &fl6);
2045         return dst;
2046 }
2047
2048 /**
2049  * i40iw_addr_resolve_neigh_ipv6 - resolve neighbor ipv6 address
2050  * @iwdev: iwarp device structure
2051  * @dst_ip: remote ip address
2052  * @arpindex: if there is an arp entry
2053  */
2054 static int i40iw_addr_resolve_neigh_ipv6(struct i40iw_device *iwdev,
2055                                          u32 *src,
2056                                          u32 *dest,
2057                                          int arpindex)
2058 {
2059         struct neighbour *neigh;
2060         int rc = arpindex;
2061         struct dst_entry *dst;
2062         struct sockaddr_in6 dst_addr;
2063         struct sockaddr_in6 src_addr;
2064
2065         memset(&dst_addr, 0, sizeof(dst_addr));
2066         dst_addr.sin6_family = AF_INET6;
2067         i40iw_copy_ip_htonl(dst_addr.sin6_addr.in6_u.u6_addr32, dest);
2068         memset(&src_addr, 0, sizeof(src_addr));
2069         src_addr.sin6_family = AF_INET6;
2070         i40iw_copy_ip_htonl(src_addr.sin6_addr.in6_u.u6_addr32, src);
2071         dst = i40iw_get_dst_ipv6(&src_addr, &dst_addr);
2072         if (!dst || dst->error) {
2073                 if (dst) {
2074                         i40iw_pr_err("ip6_route_output returned dst->error = %d\n",
2075                                      dst->error);
2076                         dst_release(dst);
2077                 }
2078                 return rc;
2079         }
2080
2081         neigh = dst_neigh_lookup(dst, dst_addr.sin6_addr.in6_u.u6_addr32);
2082
2083         rcu_read_lock();
2084         if (neigh) {
2085                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "dst_neigh_lookup MAC=%pM\n", neigh->ha);
2086                 if (neigh->nud_state & NUD_VALID) {
2087                         if (arpindex >= 0) {
2088                                 if (ether_addr_equal
2089                                     (iwdev->arp_table[arpindex].mac_addr,
2090                                      neigh->ha)) {
2091                                         /* Mac address same as in arp table */
2092                                         goto resolve_neigh_exit6;
2093                                 }
2094                                 i40iw_manage_arp_cache(iwdev,
2095                                                        iwdev->arp_table[arpindex].mac_addr,
2096                                                        dest,
2097                                                        false,
2098                                                        I40IW_ARP_DELETE);
2099                         }
2100                         i40iw_manage_arp_cache(iwdev,
2101                                                neigh->ha,
2102                                                dest,
2103                                                false,
2104                                                I40IW_ARP_ADD);
2105                         rc = i40iw_arp_table(iwdev,
2106                                              dest,
2107                                              false,
2108                                              NULL,
2109                                              I40IW_ARP_RESOLVE);
2110                 } else {
2111                         neigh_event_send(neigh, NULL);
2112                 }
2113         }
2114
2115  resolve_neigh_exit6:
2116         rcu_read_unlock();
2117         if (neigh)
2118                 neigh_release(neigh);
2119         dst_release(dst);
2120         return rc;
2121 }
2122
2123 /**
2124  * i40iw_ipv4_is_loopback - check if loopback
2125  * @loc_addr: local addr to compare
2126  * @rem_addr: remote address
2127  */
2128 static bool i40iw_ipv4_is_loopback(u32 loc_addr, u32 rem_addr)
2129 {
2130         return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr);
2131 }
2132
2133 /**
2134  * i40iw_ipv6_is_loopback - check if loopback
2135  * @loc_addr: local addr to compare
2136  * @rem_addr: remote address
2137  */
2138 static bool i40iw_ipv6_is_loopback(u32 *loc_addr, u32 *rem_addr)
2139 {
2140         struct in6_addr raddr6;
2141
2142         i40iw_copy_ip_htonl(raddr6.in6_u.u6_addr32, rem_addr);
2143         return !memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6);
2144 }
2145
2146 /**
2147  * i40iw_make_cm_node - create a new instance of a cm node
2148  * @cm_core: cm's core
2149  * @iwdev: iwarp device structure
2150  * @cm_info: quad info for connection
2151  * @listener: passive connection's listener
2152  */
2153 static struct i40iw_cm_node *i40iw_make_cm_node(
2154                                    struct i40iw_cm_core *cm_core,
2155                                    struct i40iw_device *iwdev,
2156                                    struct i40iw_cm_info *cm_info,
2157                                    struct i40iw_cm_listener *listener)
2158 {
2159         struct i40iw_cm_node *cm_node;
2160         int oldarpindex;
2161         int arpindex;
2162         struct net_device *netdev = iwdev->netdev;
2163
2164         /* create an hte and cm_node for this instance */
2165         cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
2166         if (!cm_node)
2167                 return NULL;
2168
2169         /* set our node specific transport info */
2170         cm_node->ipv4 = cm_info->ipv4;
2171         cm_node->vlan_id = cm_info->vlan_id;
2172         if ((cm_node->vlan_id == I40IW_NO_VLAN) && iwdev->dcb)
2173                 cm_node->vlan_id = 0;
2174         cm_node->tos = cm_info->tos;
2175         cm_node->user_pri = cm_info->user_pri;
2176         if (listener) {
2177                 if (listener->tos != cm_info->tos)
2178                         i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB,
2179                                     "application TOS[%d] and remote client TOS[%d] mismatch\n",
2180                                      listener->tos, cm_info->tos);
2181                 cm_node->tos = max(listener->tos, cm_info->tos);
2182                 cm_node->user_pri = rt_tos2priority(cm_node->tos);
2183                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB, "listener: TOS:[%d] UP:[%d]\n",
2184                             cm_node->tos, cm_node->user_pri);
2185         }
2186         memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr));
2187         memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr));
2188         cm_node->loc_port = cm_info->loc_port;
2189         cm_node->rem_port = cm_info->rem_port;
2190
2191         cm_node->mpa_frame_rev = iwdev->mpa_version;
2192         cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
2193         cm_node->ird_size = I40IW_MAX_IRD_SIZE;
2194         cm_node->ord_size = I40IW_MAX_ORD_SIZE;
2195
2196         cm_node->listener = listener;
2197         cm_node->cm_id = cm_info->cm_id;
2198         ether_addr_copy(cm_node->loc_mac, netdev->dev_addr);
2199         spin_lock_init(&cm_node->retrans_list_lock);
2200         cm_node->ack_rcvd = false;
2201
2202         atomic_set(&cm_node->ref_count, 1);
2203         /* associate our parent CM core */
2204         cm_node->cm_core = cm_core;
2205         cm_node->tcp_cntxt.loc_id = I40IW_CM_DEF_LOCAL_ID;
2206         cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE;
2207         cm_node->tcp_cntxt.rcv_wnd =
2208                         I40IW_CM_DEFAULT_RCV_WND_SCALED >> I40IW_CM_DEFAULT_RCV_WND_SCALE;
2209         if (cm_node->ipv4) {
2210                 cm_node->tcp_cntxt.loc_seq_num = secure_tcp_seq(htonl(cm_node->loc_addr[0]),
2211                                                         htonl(cm_node->rem_addr[0]),
2212                                                         htons(cm_node->loc_port),
2213                                                         htons(cm_node->rem_port));
2214                 cm_node->tcp_cntxt.mss = iwdev->vsi.mtu - I40IW_MTU_TO_MSS_IPV4;
2215         } else if (IS_ENABLED(CONFIG_IPV6)) {
2216                 __be32 loc[4] = {
2217                         htonl(cm_node->loc_addr[0]), htonl(cm_node->loc_addr[1]),
2218                         htonl(cm_node->loc_addr[2]), htonl(cm_node->loc_addr[3])
2219                 };
2220                 __be32 rem[4] = {
2221                         htonl(cm_node->rem_addr[0]), htonl(cm_node->rem_addr[1]),
2222                         htonl(cm_node->rem_addr[2]), htonl(cm_node->rem_addr[3])
2223                 };
2224                 cm_node->tcp_cntxt.loc_seq_num = secure_tcpv6_seq(loc, rem,
2225                                                         htons(cm_node->loc_port),
2226                                                         htons(cm_node->rem_port));
2227                 cm_node->tcp_cntxt.mss = iwdev->vsi.mtu - I40IW_MTU_TO_MSS_IPV6;
2228         }
2229
2230         cm_node->iwdev = iwdev;
2231         cm_node->dev = &iwdev->sc_dev;
2232
2233         if ((cm_node->ipv4 &&
2234              i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
2235              (!cm_node->ipv4 && i40iw_ipv6_is_loopback(cm_node->loc_addr,
2236                                                        cm_node->rem_addr))) {
2237                 arpindex = i40iw_arp_table(iwdev,
2238                                            cm_node->rem_addr,
2239                                            false,
2240                                            NULL,
2241                                            I40IW_ARP_RESOLVE);
2242         } else {
2243                 oldarpindex = i40iw_arp_table(iwdev,
2244                                               cm_node->rem_addr,
2245                                               false,
2246                                               NULL,
2247                                               I40IW_ARP_RESOLVE);
2248                 if (cm_node->ipv4)
2249                         arpindex = i40iw_addr_resolve_neigh(iwdev,
2250                                                             cm_info->loc_addr[0],
2251                                                             cm_info->rem_addr[0],
2252                                                             oldarpindex);
2253                 else if (IS_ENABLED(CONFIG_IPV6))
2254                         arpindex = i40iw_addr_resolve_neigh_ipv6(iwdev,
2255                                                                  cm_info->loc_addr,
2256                                                                  cm_info->rem_addr,
2257                                                                  oldarpindex);
2258                 else
2259                         arpindex = -EINVAL;
2260         }
2261         if (arpindex < 0) {
2262                 i40iw_pr_err("cm_node arpindex\n");
2263                 kfree(cm_node);
2264                 return NULL;
2265         }
2266         ether_addr_copy(cm_node->rem_mac, iwdev->arp_table[arpindex].mac_addr);
2267         i40iw_add_hte_node(cm_core, cm_node);
2268         cm_core->stats_nodes_created++;
2269         return cm_node;
2270 }
2271
2272 /**
2273  * i40iw_rem_ref_cm_node - destroy an instance of a cm node
2274  * @cm_node: connection's node
2275  */
2276 static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *cm_node)
2277 {
2278         struct i40iw_cm_core *cm_core = cm_node->cm_core;
2279         struct i40iw_qp *iwqp;
2280         struct i40iw_cm_info nfo;
2281         unsigned long flags;
2282
2283         spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
2284         if (atomic_dec_return(&cm_node->ref_count)) {
2285                 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
2286                 return;
2287         }
2288         list_del(&cm_node->list);
2289         spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
2290
2291         /* if the node is destroyed before connection was accelerated */
2292         if (!cm_node->accelerated && cm_node->accept_pend) {
2293                 pr_err("node destroyed before established\n");
2294                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
2295         }
2296         if (cm_node->close_entry)
2297                 i40iw_handle_close_entry(cm_node, 0);
2298         if (cm_node->listener) {
2299                 i40iw_dec_refcnt_listen(cm_core, cm_node->listener, 0, true);
2300         } else {
2301                 if (cm_node->apbvt_set) {
2302                         i40iw_manage_apbvt(cm_node->iwdev,
2303                                            cm_node->loc_port,
2304                                            I40IW_MANAGE_APBVT_DEL);
2305                         cm_node->apbvt_set = 0;
2306                 }
2307                 i40iw_get_addr_info(cm_node, &nfo);
2308                 if (cm_node->qhash_set) {
2309                         i40iw_manage_qhash(cm_node->iwdev,
2310                                            &nfo,
2311                                            I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2312                                            I40IW_QHASH_MANAGE_TYPE_DELETE,
2313                                            NULL,
2314                                            false);
2315                         cm_node->qhash_set = 0;
2316                 }
2317         }
2318
2319         iwqp = cm_node->iwqp;
2320         if (iwqp) {
2321                 iwqp->cm_node = NULL;
2322                 i40iw_rem_ref(&iwqp->ibqp);
2323                 cm_node->iwqp = NULL;
2324         } else if (cm_node->qhash_set) {
2325                 i40iw_get_addr_info(cm_node, &nfo);
2326                 i40iw_manage_qhash(cm_node->iwdev,
2327                                    &nfo,
2328                                    I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2329                                    I40IW_QHASH_MANAGE_TYPE_DELETE,
2330                                    NULL,
2331                                    false);
2332                 cm_node->qhash_set = 0;
2333         }
2334
2335         cm_node->cm_core->stats_nodes_destroyed++;
2336         kfree(cm_node);
2337 }
2338
2339 /**
2340  * i40iw_handle_fin_pkt - FIN packet received
2341  * @cm_node: connection's node
2342  */
2343 static void i40iw_handle_fin_pkt(struct i40iw_cm_node *cm_node)
2344 {
2345         u32 ret;
2346
2347         switch (cm_node->state) {
2348         case I40IW_CM_STATE_SYN_RCVD:
2349         case I40IW_CM_STATE_SYN_SENT:
2350         case I40IW_CM_STATE_ESTABLISHED:
2351         case I40IW_CM_STATE_MPAREJ_RCVD:
2352                 cm_node->tcp_cntxt.rcv_nxt++;
2353                 i40iw_cleanup_retrans_entry(cm_node);
2354                 cm_node->state = I40IW_CM_STATE_LAST_ACK;
2355                 i40iw_send_fin(cm_node);
2356                 break;
2357         case I40IW_CM_STATE_MPAREQ_SENT:
2358                 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
2359                 cm_node->tcp_cntxt.rcv_nxt++;
2360                 i40iw_cleanup_retrans_entry(cm_node);
2361                 cm_node->state = I40IW_CM_STATE_CLOSED;
2362                 atomic_inc(&cm_node->ref_count);
2363                 i40iw_send_reset(cm_node);
2364                 break;
2365         case I40IW_CM_STATE_FIN_WAIT1:
2366                 cm_node->tcp_cntxt.rcv_nxt++;
2367                 i40iw_cleanup_retrans_entry(cm_node);
2368                 cm_node->state = I40IW_CM_STATE_CLOSING;
2369                 i40iw_send_ack(cm_node);
2370                 /*
2371                  * Wait for ACK as this is simultaneous close.
2372                  * After we receive ACK, do not send anything.
2373                  * Just rm the node.
2374                  */
2375                 break;
2376         case I40IW_CM_STATE_FIN_WAIT2:
2377                 cm_node->tcp_cntxt.rcv_nxt++;
2378                 i40iw_cleanup_retrans_entry(cm_node);
2379                 cm_node->state = I40IW_CM_STATE_TIME_WAIT;
2380                 i40iw_send_ack(cm_node);
2381                 ret =
2382                     i40iw_schedule_cm_timer(cm_node, NULL, I40IW_TIMER_TYPE_CLOSE, 1, 0);
2383                 if (ret)
2384                         i40iw_pr_err("node %p state = %d\n", cm_node, cm_node->state);
2385                 break;
2386         case I40IW_CM_STATE_TIME_WAIT:
2387                 cm_node->tcp_cntxt.rcv_nxt++;
2388                 i40iw_cleanup_retrans_entry(cm_node);
2389                 cm_node->state = I40IW_CM_STATE_CLOSED;
2390                 i40iw_rem_ref_cm_node(cm_node);
2391                 break;
2392         case I40IW_CM_STATE_OFFLOADED:
2393         default:
2394                 i40iw_pr_err("bad state node %p state = %d\n", cm_node, cm_node->state);
2395                 break;
2396         }
2397 }
2398
2399 /**
2400  * i40iw_handle_rst_pkt - process received RST packet
2401  * @cm_node: connection's node
2402  * @rbuf: receive buffer
2403  */
2404 static void i40iw_handle_rst_pkt(struct i40iw_cm_node *cm_node,
2405                                  struct i40iw_puda_buf *rbuf)
2406 {
2407         i40iw_cleanup_retrans_entry(cm_node);
2408         switch (cm_node->state) {
2409         case I40IW_CM_STATE_SYN_SENT:
2410         case I40IW_CM_STATE_MPAREQ_SENT:
2411                 switch (cm_node->mpa_frame_rev) {
2412                 case IETF_MPA_V2:
2413                         cm_node->mpa_frame_rev = IETF_MPA_V1;
2414                         /* send a syn and goto syn sent state */
2415                         cm_node->state = I40IW_CM_STATE_SYN_SENT;
2416                         if (i40iw_send_syn(cm_node, 0))
2417                                 i40iw_active_open_err(cm_node, false);
2418                         break;
2419                 case IETF_MPA_V1:
2420                 default:
2421                         i40iw_active_open_err(cm_node, false);
2422                         break;
2423                 }
2424                 break;
2425         case I40IW_CM_STATE_MPAREQ_RCVD:
2426                 atomic_add_return(1, &cm_node->passive_state);
2427                 break;
2428         case I40IW_CM_STATE_ESTABLISHED:
2429         case I40IW_CM_STATE_SYN_RCVD:
2430         case I40IW_CM_STATE_LISTENING:
2431                 i40iw_pr_err("Bad state state = %d\n", cm_node->state);
2432                 i40iw_passive_open_err(cm_node, false);
2433                 break;
2434         case I40IW_CM_STATE_OFFLOADED:
2435                 i40iw_active_open_err(cm_node, false);
2436                 break;
2437         case I40IW_CM_STATE_CLOSED:
2438                 break;
2439         case I40IW_CM_STATE_FIN_WAIT2:
2440         case I40IW_CM_STATE_FIN_WAIT1:
2441         case I40IW_CM_STATE_LAST_ACK:
2442                 cm_node->cm_id->rem_ref(cm_node->cm_id);
2443                 /* fall through */
2444         case I40IW_CM_STATE_TIME_WAIT:
2445                 cm_node->state = I40IW_CM_STATE_CLOSED;
2446                 i40iw_rem_ref_cm_node(cm_node);
2447                 break;
2448         default:
2449                 break;
2450         }
2451 }
2452
2453 /**
2454  * i40iw_handle_rcv_mpa - Process a recv'd mpa buffer
2455  * @cm_node: connection's node
2456  * @rbuf: receive buffer
2457  */
2458 static void i40iw_handle_rcv_mpa(struct i40iw_cm_node *cm_node,
2459                                  struct i40iw_puda_buf *rbuf)
2460 {
2461         int ret;
2462         int datasize = rbuf->datalen;
2463         u8 *dataloc = rbuf->data;
2464
2465         enum i40iw_cm_event_type type = I40IW_CM_EVENT_UNKNOWN;
2466         u32 res_type;
2467
2468         ret = i40iw_parse_mpa(cm_node, dataloc, &res_type, datasize);
2469         if (ret) {
2470                 if (cm_node->state == I40IW_CM_STATE_MPAREQ_SENT)
2471                         i40iw_active_open_err(cm_node, true);
2472                 else
2473                         i40iw_passive_open_err(cm_node, true);
2474                 return;
2475         }
2476
2477         switch (cm_node->state) {
2478         case I40IW_CM_STATE_ESTABLISHED:
2479                 if (res_type == I40IW_MPA_REQUEST_REJECT)
2480                         i40iw_pr_err("state for reject\n");
2481                 cm_node->state = I40IW_CM_STATE_MPAREQ_RCVD;
2482                 type = I40IW_CM_EVENT_MPA_REQ;
2483                 i40iw_send_ack(cm_node);        /* ACK received MPA request */
2484                 atomic_set(&cm_node->passive_state,
2485                            I40IW_PASSIVE_STATE_INDICATED);
2486                 break;
2487         case I40IW_CM_STATE_MPAREQ_SENT:
2488                 i40iw_cleanup_retrans_entry(cm_node);
2489                 if (res_type == I40IW_MPA_REQUEST_REJECT) {
2490                         type = I40IW_CM_EVENT_MPA_REJECT;
2491                         cm_node->state = I40IW_CM_STATE_MPAREJ_RCVD;
2492                 } else {
2493                         type = I40IW_CM_EVENT_CONNECTED;
2494                         cm_node->state = I40IW_CM_STATE_OFFLOADED;
2495                 }
2496                 i40iw_send_ack(cm_node);
2497                 break;
2498         default:
2499                 pr_err("%s wrong cm_node state =%d\n", __func__, cm_node->state);
2500                 break;
2501         }
2502         i40iw_create_event(cm_node, type);
2503 }
2504
2505 /**
2506  * i40iw_indicate_pkt_err - Send up err event to cm
2507  * @cm_node: connection's node
2508  */
2509 static void i40iw_indicate_pkt_err(struct i40iw_cm_node *cm_node)
2510 {
2511         switch (cm_node->state) {
2512         case I40IW_CM_STATE_SYN_SENT:
2513         case I40IW_CM_STATE_MPAREQ_SENT:
2514                 i40iw_active_open_err(cm_node, true);
2515                 break;
2516         case I40IW_CM_STATE_ESTABLISHED:
2517         case I40IW_CM_STATE_SYN_RCVD:
2518                 i40iw_passive_open_err(cm_node, true);
2519                 break;
2520         case I40IW_CM_STATE_OFFLOADED:
2521         default:
2522                 break;
2523         }
2524 }
2525
2526 /**
2527  * i40iw_check_syn - Check for error on received syn ack
2528  * @cm_node: connection's node
2529  * @tcph: pointer tcp header
2530  */
2531 static int i40iw_check_syn(struct i40iw_cm_node *cm_node, struct tcphdr *tcph)
2532 {
2533         int err = 0;
2534
2535         if (ntohl(tcph->ack_seq) != cm_node->tcp_cntxt.loc_seq_num) {
2536                 err = 1;
2537                 i40iw_active_open_err(cm_node, true);
2538         }
2539         return err;
2540 }
2541
2542 /**
2543  * i40iw_check_seq - check seq numbers if OK
2544  * @cm_node: connection's node
2545  * @tcph: pointer tcp header
2546  */
2547 static int i40iw_check_seq(struct i40iw_cm_node *cm_node, struct tcphdr *tcph)
2548 {
2549         int err = 0;
2550         u32 seq;
2551         u32 ack_seq;
2552         u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
2553         u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
2554         u32 rcv_wnd;
2555
2556         seq = ntohl(tcph->seq);
2557         ack_seq = ntohl(tcph->ack_seq);
2558         rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
2559         if (ack_seq != loc_seq_num)
2560                 err = -1;
2561         else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
2562                 err = -1;
2563         if (err) {
2564                 i40iw_pr_err("seq number\n");
2565                 i40iw_indicate_pkt_err(cm_node);
2566         }
2567         return err;
2568 }
2569
2570 /**
2571  * i40iw_handle_syn_pkt - is for Passive node
2572  * @cm_node: connection's node
2573  * @rbuf: receive buffer
2574  */
2575 static void i40iw_handle_syn_pkt(struct i40iw_cm_node *cm_node,
2576                                  struct i40iw_puda_buf *rbuf)
2577 {
2578         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2579         int ret;
2580         u32 inc_sequence;
2581         int optionsize;
2582         struct i40iw_cm_info nfo;
2583
2584         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2585         inc_sequence = ntohl(tcph->seq);
2586
2587         switch (cm_node->state) {
2588         case I40IW_CM_STATE_SYN_SENT:
2589         case I40IW_CM_STATE_MPAREQ_SENT:
2590                 /* Rcvd syn on active open connection */
2591                 i40iw_active_open_err(cm_node, 1);
2592                 break;
2593         case I40IW_CM_STATE_LISTENING:
2594                 /* Passive OPEN */
2595                 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
2596                     cm_node->listener->backlog) {
2597                         cm_node->cm_core->stats_backlog_drops++;
2598                         i40iw_passive_open_err(cm_node, false);
2599                         break;
2600                 }
2601                 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1);
2602                 if (ret) {
2603                         i40iw_passive_open_err(cm_node, false);
2604                         /* drop pkt */
2605                         break;
2606                 }
2607                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2608                 cm_node->accept_pend = 1;
2609                 atomic_inc(&cm_node->listener->pend_accepts_cnt);
2610
2611                 cm_node->state = I40IW_CM_STATE_SYN_RCVD;
2612                 i40iw_get_addr_info(cm_node, &nfo);
2613                 ret = i40iw_manage_qhash(cm_node->iwdev,
2614                                          &nfo,
2615                                          I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2616                                          I40IW_QHASH_MANAGE_TYPE_ADD,
2617                                          (void *)cm_node,
2618                                          false);
2619                 cm_node->qhash_set = true;
2620                 break;
2621         case I40IW_CM_STATE_CLOSED:
2622                 i40iw_cleanup_retrans_entry(cm_node);
2623                 atomic_inc(&cm_node->ref_count);
2624                 i40iw_send_reset(cm_node);
2625                 break;
2626         case I40IW_CM_STATE_OFFLOADED:
2627         case I40IW_CM_STATE_ESTABLISHED:
2628         case I40IW_CM_STATE_FIN_WAIT1:
2629         case I40IW_CM_STATE_FIN_WAIT2:
2630         case I40IW_CM_STATE_MPAREQ_RCVD:
2631         case I40IW_CM_STATE_LAST_ACK:
2632         case I40IW_CM_STATE_CLOSING:
2633         case I40IW_CM_STATE_UNKNOWN:
2634         default:
2635                 break;
2636         }
2637 }
2638
2639 /**
2640  * i40iw_handle_synack_pkt - Process SYN+ACK packet (active side)
2641  * @cm_node: connection's node
2642  * @rbuf: receive buffer
2643  */
2644 static void i40iw_handle_synack_pkt(struct i40iw_cm_node *cm_node,
2645                                     struct i40iw_puda_buf *rbuf)
2646 {
2647         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2648         int ret;
2649         u32 inc_sequence;
2650         int optionsize;
2651
2652         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2653         inc_sequence = ntohl(tcph->seq);
2654         switch (cm_node->state) {
2655         case I40IW_CM_STATE_SYN_SENT:
2656                 i40iw_cleanup_retrans_entry(cm_node);
2657                 /* active open */
2658                 if (i40iw_check_syn(cm_node, tcph)) {
2659                         i40iw_pr_err("check syn fail\n");
2660                         return;
2661                 }
2662                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2663                 /* setup options */
2664                 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 0);
2665                 if (ret) {
2666                         i40iw_debug(cm_node->dev,
2667                                     I40IW_DEBUG_CM,
2668                                     "cm_node=%p tcp_options failed\n",
2669                                     cm_node);
2670                         break;
2671                 }
2672                 i40iw_cleanup_retrans_entry(cm_node);
2673                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2674                 i40iw_send_ack(cm_node);        /* ACK  for the syn_ack */
2675                 ret = i40iw_send_mpa_request(cm_node);
2676                 if (ret) {
2677                         i40iw_debug(cm_node->dev,
2678                                     I40IW_DEBUG_CM,
2679                                     "cm_node=%p i40iw_send_mpa_request failed\n",
2680                                     cm_node);
2681                         break;
2682                 }
2683                 cm_node->state = I40IW_CM_STATE_MPAREQ_SENT;
2684                 break;
2685         case I40IW_CM_STATE_MPAREQ_RCVD:
2686                 i40iw_passive_open_err(cm_node, true);
2687                 break;
2688         case I40IW_CM_STATE_LISTENING:
2689                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2690                 i40iw_cleanup_retrans_entry(cm_node);
2691                 cm_node->state = I40IW_CM_STATE_CLOSED;
2692                 i40iw_send_reset(cm_node);
2693                 break;
2694         case I40IW_CM_STATE_CLOSED:
2695                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2696                 i40iw_cleanup_retrans_entry(cm_node);
2697                 atomic_inc(&cm_node->ref_count);
2698                 i40iw_send_reset(cm_node);
2699                 break;
2700         case I40IW_CM_STATE_ESTABLISHED:
2701         case I40IW_CM_STATE_FIN_WAIT1:
2702         case I40IW_CM_STATE_FIN_WAIT2:
2703         case I40IW_CM_STATE_LAST_ACK:
2704         case I40IW_CM_STATE_OFFLOADED:
2705         case I40IW_CM_STATE_CLOSING:
2706         case I40IW_CM_STATE_UNKNOWN:
2707         case I40IW_CM_STATE_MPAREQ_SENT:
2708         default:
2709                 break;
2710         }
2711 }
2712
2713 /**
2714  * i40iw_handle_ack_pkt - process packet with ACK
2715  * @cm_node: connection's node
2716  * @rbuf: receive buffer
2717  */
2718 static int i40iw_handle_ack_pkt(struct i40iw_cm_node *cm_node,
2719                                 struct i40iw_puda_buf *rbuf)
2720 {
2721         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2722         u32 inc_sequence;
2723         int ret = 0;
2724         int optionsize;
2725         u32 datasize = rbuf->datalen;
2726
2727         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2728
2729         if (i40iw_check_seq(cm_node, tcph))
2730                 return -EINVAL;
2731
2732         inc_sequence = ntohl(tcph->seq);
2733         switch (cm_node->state) {
2734         case I40IW_CM_STATE_SYN_RCVD:
2735                 i40iw_cleanup_retrans_entry(cm_node);
2736                 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1);
2737                 if (ret)
2738                         break;
2739                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2740                 cm_node->state = I40IW_CM_STATE_ESTABLISHED;
2741                 if (datasize) {
2742                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2743                         i40iw_handle_rcv_mpa(cm_node, rbuf);
2744                 }
2745                 break;
2746         case I40IW_CM_STATE_ESTABLISHED:
2747                 i40iw_cleanup_retrans_entry(cm_node);
2748                 if (datasize) {
2749                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2750                         i40iw_handle_rcv_mpa(cm_node, rbuf);
2751                 }
2752                 break;
2753         case I40IW_CM_STATE_MPAREQ_SENT:
2754                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2755                 if (datasize) {
2756                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2757                         cm_node->ack_rcvd = false;
2758                         i40iw_handle_rcv_mpa(cm_node, rbuf);
2759                 } else {
2760                         cm_node->ack_rcvd = true;
2761                 }
2762                 break;
2763         case I40IW_CM_STATE_LISTENING:
2764                 i40iw_cleanup_retrans_entry(cm_node);
2765                 cm_node->state = I40IW_CM_STATE_CLOSED;
2766                 i40iw_send_reset(cm_node);
2767                 break;
2768         case I40IW_CM_STATE_CLOSED:
2769                 i40iw_cleanup_retrans_entry(cm_node);
2770                 atomic_inc(&cm_node->ref_count);
2771                 i40iw_send_reset(cm_node);
2772                 break;
2773         case I40IW_CM_STATE_LAST_ACK:
2774         case I40IW_CM_STATE_CLOSING:
2775                 i40iw_cleanup_retrans_entry(cm_node);
2776                 cm_node->state = I40IW_CM_STATE_CLOSED;
2777                 if (!cm_node->accept_pend)
2778                         cm_node->cm_id->rem_ref(cm_node->cm_id);
2779                 i40iw_rem_ref_cm_node(cm_node);
2780                 break;
2781         case I40IW_CM_STATE_FIN_WAIT1:
2782                 i40iw_cleanup_retrans_entry(cm_node);
2783                 cm_node->state = I40IW_CM_STATE_FIN_WAIT2;
2784                 break;
2785         case I40IW_CM_STATE_SYN_SENT:
2786         case I40IW_CM_STATE_FIN_WAIT2:
2787         case I40IW_CM_STATE_OFFLOADED:
2788         case I40IW_CM_STATE_MPAREQ_RCVD:
2789         case I40IW_CM_STATE_UNKNOWN:
2790         default:
2791                 i40iw_cleanup_retrans_entry(cm_node);
2792                 break;
2793         }
2794         return ret;
2795 }
2796
2797 /**
2798  * i40iw_process_packet - process cm packet
2799  * @cm_node: connection's node
2800  * @rbuf: receive buffer
2801  */
2802 static void i40iw_process_packet(struct i40iw_cm_node *cm_node,
2803                                  struct i40iw_puda_buf *rbuf)
2804 {
2805         enum i40iw_tcpip_pkt_type pkt_type = I40IW_PKT_TYPE_UNKNOWN;
2806         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2807         u32 fin_set = 0;
2808         int ret;
2809
2810         if (tcph->rst) {
2811                 pkt_type = I40IW_PKT_TYPE_RST;
2812         } else if (tcph->syn) {
2813                 pkt_type = I40IW_PKT_TYPE_SYN;
2814                 if (tcph->ack)
2815                         pkt_type = I40IW_PKT_TYPE_SYNACK;
2816         } else if (tcph->ack) {
2817                 pkt_type = I40IW_PKT_TYPE_ACK;
2818         }
2819         if (tcph->fin)
2820                 fin_set = 1;
2821
2822         switch (pkt_type) {
2823         case I40IW_PKT_TYPE_SYN:
2824                 i40iw_handle_syn_pkt(cm_node, rbuf);
2825                 break;
2826         case I40IW_PKT_TYPE_SYNACK:
2827                 i40iw_handle_synack_pkt(cm_node, rbuf);
2828                 break;
2829         case I40IW_PKT_TYPE_ACK:
2830                 ret = i40iw_handle_ack_pkt(cm_node, rbuf);
2831                 if (fin_set && !ret)
2832                         i40iw_handle_fin_pkt(cm_node);
2833                 break;
2834         case I40IW_PKT_TYPE_RST:
2835                 i40iw_handle_rst_pkt(cm_node, rbuf);
2836                 break;
2837         default:
2838                 if (fin_set &&
2839                     (!i40iw_check_seq(cm_node, (struct tcphdr *)rbuf->tcph)))
2840                         i40iw_handle_fin_pkt(cm_node);
2841                 break;
2842         }
2843 }
2844
2845 /**
2846  * i40iw_make_listen_node - create a listen node with params
2847  * @cm_core: cm's core
2848  * @iwdev: iwarp device structure
2849  * @cm_info: quad info for connection
2850  */
2851 static struct i40iw_cm_listener *i40iw_make_listen_node(
2852                                         struct i40iw_cm_core *cm_core,
2853                                         struct i40iw_device *iwdev,
2854                                         struct i40iw_cm_info *cm_info)
2855 {
2856         struct i40iw_cm_listener *listener;
2857         unsigned long flags;
2858
2859         /* cannot have multiple matching listeners */
2860         listener = i40iw_find_listener(cm_core, cm_info->loc_addr,
2861                                        cm_info->loc_port,
2862                                        cm_info->vlan_id,
2863                                        I40IW_CM_LISTENER_EITHER_STATE);
2864         if (listener &&
2865             (listener->listener_state == I40IW_CM_LISTENER_ACTIVE_STATE)) {
2866                 atomic_dec(&listener->ref_count);
2867                 i40iw_debug(cm_core->dev,
2868                             I40IW_DEBUG_CM,
2869                             "Not creating listener since it already exists\n");
2870                 return NULL;
2871         }
2872
2873         if (!listener) {
2874                 /* create a CM listen node (1/2 node to compare incoming traffic to) */
2875                 listener = kzalloc(sizeof(*listener), GFP_KERNEL);
2876                 if (!listener)
2877                         return NULL;
2878                 cm_core->stats_listen_nodes_created++;
2879                 memcpy(listener->loc_addr, cm_info->loc_addr, sizeof(listener->loc_addr));
2880                 listener->loc_port = cm_info->loc_port;
2881
2882                 INIT_LIST_HEAD(&listener->child_listen_list);
2883
2884                 atomic_set(&listener->ref_count, 1);
2885         } else {
2886                 listener->reused_node = 1;
2887         }
2888
2889         listener->cm_id = cm_info->cm_id;
2890         listener->ipv4 = cm_info->ipv4;
2891         listener->vlan_id = cm_info->vlan_id;
2892         atomic_set(&listener->pend_accepts_cnt, 0);
2893         listener->cm_core = cm_core;
2894         listener->iwdev = iwdev;
2895
2896         listener->backlog = cm_info->backlog;
2897         listener->listener_state = I40IW_CM_LISTENER_ACTIVE_STATE;
2898
2899         if (!listener->reused_node) {
2900                 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2901                 list_add(&listener->list, &cm_core->listen_nodes);
2902                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2903         }
2904
2905         return listener;
2906 }
2907
2908 /**
2909  * i40iw_create_cm_node - make a connection node with params
2910  * @cm_core: cm's core
2911  * @iwdev: iwarp device structure
2912  * @conn_param: upper layer connection parameters
2913  * @cm_info: quad info for connection
2914  */
2915 static struct i40iw_cm_node *i40iw_create_cm_node(
2916                                         struct i40iw_cm_core *cm_core,
2917                                         struct i40iw_device *iwdev,
2918                                         struct iw_cm_conn_param *conn_param,
2919                                         struct i40iw_cm_info *cm_info)
2920 {
2921         struct i40iw_cm_node *cm_node;
2922         struct i40iw_cm_listener *loopback_remotelistener;
2923         struct i40iw_cm_node *loopback_remotenode;
2924         struct i40iw_cm_info loopback_cm_info;
2925
2926         u16 private_data_len = conn_param->private_data_len;
2927         const void *private_data = conn_param->private_data;
2928
2929         /* create a CM connection node */
2930         cm_node = i40iw_make_cm_node(cm_core, iwdev, cm_info, NULL);
2931         if (!cm_node)
2932                 return ERR_PTR(-ENOMEM);
2933         /* set our node side to client (active) side */
2934         cm_node->tcp_cntxt.client = 1;
2935         cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE;
2936
2937         i40iw_record_ird_ord(cm_node, conn_param->ird, conn_param->ord);
2938
2939         if (!memcmp(cm_info->loc_addr, cm_info->rem_addr, sizeof(cm_info->loc_addr))) {
2940                 loopback_remotelistener = i40iw_find_listener(
2941                                                 cm_core,
2942                                                 cm_info->rem_addr,
2943                                                 cm_node->rem_port,
2944                                                 cm_node->vlan_id,
2945                                                 I40IW_CM_LISTENER_ACTIVE_STATE);
2946                 if (!loopback_remotelistener) {
2947                         i40iw_rem_ref_cm_node(cm_node);
2948                         return ERR_PTR(-ECONNREFUSED);
2949                 } else {
2950                         loopback_cm_info = *cm_info;
2951                         loopback_cm_info.loc_port = cm_info->rem_port;
2952                         loopback_cm_info.rem_port = cm_info->loc_port;
2953                         loopback_cm_info.cm_id = loopback_remotelistener->cm_id;
2954                         loopback_cm_info.ipv4 = cm_info->ipv4;
2955                         loopback_remotenode = i40iw_make_cm_node(cm_core,
2956                                                                  iwdev,
2957                                                                  &loopback_cm_info,
2958                                                                  loopback_remotelistener);
2959                         if (!loopback_remotenode) {
2960                                 i40iw_rem_ref_cm_node(cm_node);
2961                                 return ERR_PTR(-ENOMEM);
2962                         }
2963                         cm_core->stats_loopbacks++;
2964                         loopback_remotenode->loopbackpartner = cm_node;
2965                         loopback_remotenode->tcp_cntxt.rcv_wscale =
2966                                 I40IW_CM_DEFAULT_RCV_WND_SCALE;
2967                         cm_node->loopbackpartner = loopback_remotenode;
2968                         memcpy(loopback_remotenode->pdata_buf, private_data,
2969                                private_data_len);
2970                         loopback_remotenode->pdata.size = private_data_len;
2971
2972                         if (loopback_remotenode->ord_size > cm_node->ird_size)
2973                                 loopback_remotenode->ord_size =
2974                                         cm_node->ird_size;
2975
2976                         cm_node->state = I40IW_CM_STATE_OFFLOADED;
2977                         cm_node->tcp_cntxt.rcv_nxt =
2978                                 loopback_remotenode->tcp_cntxt.loc_seq_num;
2979                         loopback_remotenode->tcp_cntxt.rcv_nxt =
2980                                 cm_node->tcp_cntxt.loc_seq_num;
2981                         cm_node->tcp_cntxt.max_snd_wnd =
2982                                 loopback_remotenode->tcp_cntxt.rcv_wnd;
2983                         loopback_remotenode->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
2984                         cm_node->tcp_cntxt.snd_wnd = loopback_remotenode->tcp_cntxt.rcv_wnd;
2985                         loopback_remotenode->tcp_cntxt.snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
2986                         cm_node->tcp_cntxt.snd_wscale = loopback_remotenode->tcp_cntxt.rcv_wscale;
2987                         loopback_remotenode->tcp_cntxt.snd_wscale = cm_node->tcp_cntxt.rcv_wscale;
2988                 }
2989                 return cm_node;
2990         }
2991
2992         cm_node->pdata.size = private_data_len;
2993         cm_node->pdata.addr = cm_node->pdata_buf;
2994
2995         memcpy(cm_node->pdata_buf, private_data, private_data_len);
2996
2997         cm_node->state = I40IW_CM_STATE_SYN_SENT;
2998         return cm_node;
2999 }
3000
3001 /**
3002  * i40iw_cm_reject - reject and teardown a connection
3003  * @cm_node: connection's node
3004  * @pdate: ptr to private data for reject
3005  * @plen: size of private data
3006  */
3007 static int i40iw_cm_reject(struct i40iw_cm_node *cm_node, const void *pdata, u8 plen)
3008 {
3009         int ret = 0;
3010         int err;
3011         int passive_state;
3012         struct iw_cm_id *cm_id = cm_node->cm_id;
3013         struct i40iw_cm_node *loopback = cm_node->loopbackpartner;
3014
3015         if (cm_node->tcp_cntxt.client)
3016                 return ret;
3017         i40iw_cleanup_retrans_entry(cm_node);
3018
3019         if (!loopback) {
3020                 passive_state = atomic_add_return(1, &cm_node->passive_state);
3021                 if (passive_state == I40IW_SEND_RESET_EVENT) {
3022                         cm_node->state = I40IW_CM_STATE_CLOSED;
3023                         i40iw_rem_ref_cm_node(cm_node);
3024                 } else {
3025                         if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
3026                                 i40iw_rem_ref_cm_node(cm_node);
3027                         } else {
3028                                 ret = i40iw_send_mpa_reject(cm_node, pdata, plen);
3029                                 if (ret) {
3030                                         cm_node->state = I40IW_CM_STATE_CLOSED;
3031                                         err = i40iw_send_reset(cm_node);
3032                                         if (err)
3033                                                 i40iw_pr_err("send reset failed\n");
3034                                 } else {
3035                                         cm_id->add_ref(cm_id);
3036                                 }
3037                         }
3038                 }
3039         } else {
3040                 cm_node->cm_id = NULL;
3041                 if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
3042                         i40iw_rem_ref_cm_node(cm_node);
3043                         i40iw_rem_ref_cm_node(loopback);
3044                 } else {
3045                         ret = i40iw_send_cm_event(loopback,
3046                                                   loopback->cm_id,
3047                                                   IW_CM_EVENT_CONNECT_REPLY,
3048                                                   -ECONNREFUSED);
3049                         i40iw_rem_ref_cm_node(cm_node);
3050                         loopback->state = I40IW_CM_STATE_CLOSING;
3051
3052                         cm_id = loopback->cm_id;
3053                         i40iw_rem_ref_cm_node(loopback);
3054                         cm_id->rem_ref(cm_id);
3055                 }
3056         }
3057
3058         return ret;
3059 }
3060
3061 /**
3062  * i40iw_cm_close - close of cm connection
3063  * @cm_node: connection's node
3064  */
3065 static int i40iw_cm_close(struct i40iw_cm_node *cm_node)
3066 {
3067         int ret = 0;
3068
3069         if (!cm_node)
3070                 return -EINVAL;
3071
3072         switch (cm_node->state) {
3073         case I40IW_CM_STATE_SYN_RCVD:
3074         case I40IW_CM_STATE_SYN_SENT:
3075         case I40IW_CM_STATE_ONE_SIDE_ESTABLISHED:
3076         case I40IW_CM_STATE_ESTABLISHED:
3077         case I40IW_CM_STATE_ACCEPTING:
3078         case I40IW_CM_STATE_MPAREQ_SENT:
3079         case I40IW_CM_STATE_MPAREQ_RCVD:
3080                 i40iw_cleanup_retrans_entry(cm_node);
3081                 i40iw_send_reset(cm_node);
3082                 break;
3083         case I40IW_CM_STATE_CLOSE_WAIT:
3084                 cm_node->state = I40IW_CM_STATE_LAST_ACK;
3085                 i40iw_send_fin(cm_node);
3086                 break;
3087         case I40IW_CM_STATE_FIN_WAIT1:
3088         case I40IW_CM_STATE_FIN_WAIT2:
3089         case I40IW_CM_STATE_LAST_ACK:
3090         case I40IW_CM_STATE_TIME_WAIT:
3091         case I40IW_CM_STATE_CLOSING:
3092                 ret = -1;
3093                 break;
3094         case I40IW_CM_STATE_LISTENING:
3095                 i40iw_cleanup_retrans_entry(cm_node);
3096                 i40iw_send_reset(cm_node);
3097                 break;
3098         case I40IW_CM_STATE_MPAREJ_RCVD:
3099         case I40IW_CM_STATE_UNKNOWN:
3100         case I40IW_CM_STATE_INITED:
3101         case I40IW_CM_STATE_CLOSED:
3102         case I40IW_CM_STATE_LISTENER_DESTROYED:
3103                 i40iw_rem_ref_cm_node(cm_node);
3104                 break;
3105         case I40IW_CM_STATE_OFFLOADED:
3106                 if (cm_node->send_entry)
3107                         i40iw_pr_err("send_entry\n");
3108                 i40iw_rem_ref_cm_node(cm_node);
3109                 break;
3110         }
3111         return ret;
3112 }
3113
3114 /**
3115  * i40iw_receive_ilq - recv an ETHERNET packet, and process it
3116  * through CM
3117  * @vsi: pointer to the vsi structure
3118  * @rbuf: receive buffer
3119  */
3120 void i40iw_receive_ilq(struct i40iw_sc_vsi *vsi, struct i40iw_puda_buf *rbuf)
3121 {
3122         struct i40iw_cm_node *cm_node;
3123         struct i40iw_cm_listener *listener;
3124         struct iphdr *iph;
3125         struct ipv6hdr *ip6h;
3126         struct tcphdr *tcph;
3127         struct i40iw_cm_info cm_info;
3128         struct i40iw_sc_dev *dev = vsi->dev;
3129         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
3130         struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3131         struct vlan_ethhdr *ethh;
3132         u16 vtag;
3133
3134         /* if vlan, then maclen = 18 else 14 */
3135         iph = (struct iphdr *)rbuf->iph;
3136         memset(&cm_info, 0, sizeof(cm_info));
3137
3138         i40iw_debug_buf(dev,
3139                         I40IW_DEBUG_ILQ,
3140                         "RECEIVE ILQ BUFFER",
3141                         rbuf->mem.va,
3142                         rbuf->totallen);
3143         ethh = (struct vlan_ethhdr *)rbuf->mem.va;
3144
3145         if (ethh->h_vlan_proto == htons(ETH_P_8021Q)) {
3146                 vtag = ntohs(ethh->h_vlan_TCI);
3147                 cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
3148                 cm_info.vlan_id = vtag & VLAN_VID_MASK;
3149                 i40iw_debug(cm_core->dev,
3150                             I40IW_DEBUG_CM,
3151                             "%s vlan_id=%d\n",
3152                             __func__,
3153                             cm_info.vlan_id);
3154         } else {
3155                 cm_info.vlan_id = I40IW_NO_VLAN;
3156         }
3157         tcph = (struct tcphdr *)rbuf->tcph;
3158
3159         if (rbuf->ipv4) {
3160                 cm_info.loc_addr[0] = ntohl(iph->daddr);
3161                 cm_info.rem_addr[0] = ntohl(iph->saddr);
3162                 cm_info.ipv4 = true;
3163                 cm_info.tos = iph->tos;
3164         } else {
3165                 ip6h = (struct ipv6hdr *)rbuf->iph;
3166                 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3167                                     ip6h->daddr.in6_u.u6_addr32);
3168                 i40iw_copy_ip_ntohl(cm_info.rem_addr,
3169                                     ip6h->saddr.in6_u.u6_addr32);
3170                 cm_info.ipv4 = false;
3171                 cm_info.tos = (ip6h->priority << 4) | (ip6h->flow_lbl[0] >> 4);
3172         }
3173         cm_info.loc_port = ntohs(tcph->dest);
3174         cm_info.rem_port = ntohs(tcph->source);
3175         cm_node = i40iw_find_node(cm_core,
3176                                   cm_info.rem_port,
3177                                   cm_info.rem_addr,
3178                                   cm_info.loc_port,
3179                                   cm_info.loc_addr,
3180                                   true,
3181                                   false);
3182
3183         if (!cm_node) {
3184                 /* Only type of packet accepted are for */
3185                 /* the PASSIVE open (syn only) */
3186                 if (!tcph->syn || tcph->ack)
3187                         return;
3188                 listener =
3189                     i40iw_find_listener(cm_core,
3190                                         cm_info.loc_addr,
3191                                         cm_info.loc_port,
3192                                         cm_info.vlan_id,
3193                                         I40IW_CM_LISTENER_ACTIVE_STATE);
3194                 if (!listener) {
3195                         cm_info.cm_id = NULL;
3196                         i40iw_debug(cm_core->dev,
3197                                     I40IW_DEBUG_CM,
3198                                     "%s no listener found\n",
3199                                     __func__);
3200                         return;
3201                 }
3202                 cm_info.cm_id = listener->cm_id;
3203                 cm_node = i40iw_make_cm_node(cm_core, iwdev, &cm_info, listener);
3204                 if (!cm_node) {
3205                         i40iw_debug(cm_core->dev,
3206                                     I40IW_DEBUG_CM,
3207                                     "%s allocate node failed\n",
3208                                     __func__);
3209                         atomic_dec(&listener->ref_count);
3210                         return;
3211                 }
3212                 if (!tcph->rst && !tcph->fin) {
3213                         cm_node->state = I40IW_CM_STATE_LISTENING;
3214                 } else {
3215                         i40iw_rem_ref_cm_node(cm_node);
3216                         return;
3217                 }
3218                 atomic_inc(&cm_node->ref_count);
3219         } else if (cm_node->state == I40IW_CM_STATE_OFFLOADED) {
3220                 i40iw_rem_ref_cm_node(cm_node);
3221                 return;
3222         }
3223         i40iw_process_packet(cm_node, rbuf);
3224         i40iw_rem_ref_cm_node(cm_node);
3225 }
3226
3227 /**
3228  * i40iw_setup_cm_core - allocate a top level instance of a cm
3229  * core
3230  * @iwdev: iwarp device structure
3231  */
3232 void i40iw_setup_cm_core(struct i40iw_device *iwdev)
3233 {
3234         struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3235
3236         cm_core->iwdev = iwdev;
3237         cm_core->dev = &iwdev->sc_dev;
3238
3239         INIT_LIST_HEAD(&cm_core->accelerated_list);
3240         INIT_LIST_HEAD(&cm_core->non_accelerated_list);
3241         INIT_LIST_HEAD(&cm_core->listen_nodes);
3242
3243         timer_setup(&cm_core->tcp_timer, i40iw_cm_timer_tick, 0);
3244
3245         spin_lock_init(&cm_core->ht_lock);
3246         spin_lock_init(&cm_core->listen_list_lock);
3247         spin_lock_init(&cm_core->apbvt_lock);
3248
3249         cm_core->event_wq = alloc_ordered_workqueue("iwewq",
3250                                                     WQ_MEM_RECLAIM);
3251
3252         cm_core->disconn_wq = alloc_ordered_workqueue("iwdwq",
3253                                                       WQ_MEM_RECLAIM);
3254 }
3255
3256 /**
3257  * i40iw_cleanup_cm_core - deallocate a top level instance of a
3258  * cm core
3259  * @cm_core: cm's core
3260  */
3261 void i40iw_cleanup_cm_core(struct i40iw_cm_core *cm_core)
3262 {
3263         unsigned long flags;
3264
3265         if (!cm_core)
3266                 return;
3267
3268         spin_lock_irqsave(&cm_core->ht_lock, flags);
3269         if (timer_pending(&cm_core->tcp_timer))
3270                 del_timer_sync(&cm_core->tcp_timer);
3271         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
3272
3273         destroy_workqueue(cm_core->event_wq);
3274         destroy_workqueue(cm_core->disconn_wq);
3275 }
3276
3277 /**
3278  * i40iw_init_tcp_ctx - setup qp context
3279  * @cm_node: connection's node
3280  * @tcp_info: offload info for tcp
3281  * @iwqp: associate qp for the connection
3282  */
3283 static void i40iw_init_tcp_ctx(struct i40iw_cm_node *cm_node,
3284                                struct i40iw_tcp_offload_info *tcp_info,
3285                                struct i40iw_qp *iwqp)
3286 {
3287         tcp_info->ipv4 = cm_node->ipv4;
3288         tcp_info->drop_ooo_seg = true;
3289         tcp_info->wscale = true;
3290         tcp_info->ignore_tcp_opt = true;
3291         tcp_info->ignore_tcp_uns_opt = true;
3292         tcp_info->no_nagle = false;
3293
3294         tcp_info->ttl = I40IW_DEFAULT_TTL;
3295         tcp_info->rtt_var = cpu_to_le32(I40IW_DEFAULT_RTT_VAR);
3296         tcp_info->ss_thresh = cpu_to_le32(I40IW_DEFAULT_SS_THRESH);
3297         tcp_info->rexmit_thresh = I40IW_DEFAULT_REXMIT_THRESH;
3298
3299         tcp_info->tcp_state = I40IW_TCP_STATE_ESTABLISHED;
3300         tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale;
3301         tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale;
3302
3303         tcp_info->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3304         tcp_info->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
3305         tcp_info->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
3306         tcp_info->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3307
3308         tcp_info->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3309         tcp_info->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss);
3310         tcp_info->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
3311         tcp_info->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3312         tcp_info->max_snd_window = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
3313         tcp_info->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
3314                                         cm_node->tcp_cntxt.rcv_wscale);
3315
3316         tcp_info->flow_label = 0;
3317         tcp_info->snd_mss = cpu_to_le32(((u32)cm_node->tcp_cntxt.mss));
3318         if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
3319                 tcp_info->insert_vlan_tag = true;
3320                 tcp_info->vlan_tag = cpu_to_le16(((u16)cm_node->user_pri << I40IW_VLAN_PRIO_SHIFT) |
3321                                                   cm_node->vlan_id);
3322         }
3323         if (cm_node->ipv4) {
3324                 tcp_info->src_port = cpu_to_le16(cm_node->loc_port);
3325                 tcp_info->dst_port = cpu_to_le16(cm_node->rem_port);
3326
3327                 tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[0]);
3328                 tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[0]);
3329                 tcp_info->arp_idx =
3330                         cpu_to_le16((u16)i40iw_arp_table(
3331                                                          iwqp->iwdev,
3332                                                          &tcp_info->dest_ip_addr3,
3333                                                          true,
3334                                                          NULL,
3335                                                          I40IW_ARP_RESOLVE));
3336         } else {
3337                 tcp_info->src_port = cpu_to_le16(cm_node->loc_port);
3338                 tcp_info->dst_port = cpu_to_le16(cm_node->rem_port);
3339                 tcp_info->dest_ip_addr0 = cpu_to_le32(cm_node->rem_addr[0]);
3340                 tcp_info->dest_ip_addr1 = cpu_to_le32(cm_node->rem_addr[1]);
3341                 tcp_info->dest_ip_addr2 = cpu_to_le32(cm_node->rem_addr[2]);
3342                 tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[3]);
3343                 tcp_info->local_ipaddr0 = cpu_to_le32(cm_node->loc_addr[0]);
3344                 tcp_info->local_ipaddr1 = cpu_to_le32(cm_node->loc_addr[1]);
3345                 tcp_info->local_ipaddr2 = cpu_to_le32(cm_node->loc_addr[2]);
3346                 tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[3]);
3347                 tcp_info->arp_idx =
3348                         cpu_to_le16((u16)i40iw_arp_table(
3349                                                          iwqp->iwdev,
3350                                                          &tcp_info->dest_ip_addr0,
3351                                                          false,
3352                                                          NULL,
3353                                                          I40IW_ARP_RESOLVE));
3354         }
3355 }
3356
3357 /**
3358  * i40iw_cm_init_tsa_conn - setup qp for RTS
3359  * @iwqp: associate qp for the connection
3360  * @cm_node: connection's node
3361  */
3362 static void i40iw_cm_init_tsa_conn(struct i40iw_qp *iwqp,
3363                                    struct i40iw_cm_node *cm_node)
3364 {
3365         struct i40iw_tcp_offload_info tcp_info;
3366         struct i40iwarp_offload_info *iwarp_info;
3367         struct i40iw_qp_host_ctx_info *ctx_info;
3368         struct i40iw_device *iwdev = iwqp->iwdev;
3369         struct i40iw_sc_dev *dev = &iwqp->iwdev->sc_dev;
3370
3371         memset(&tcp_info, 0x00, sizeof(struct i40iw_tcp_offload_info));
3372         iwarp_info = &iwqp->iwarp_info;
3373         ctx_info = &iwqp->ctx_info;
3374
3375         ctx_info->tcp_info = &tcp_info;
3376         ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id;
3377         ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id;
3378
3379         iwarp_info->ord_size = cm_node->ord_size;
3380         iwarp_info->ird_size = i40iw_derive_hw_ird_setting(cm_node->ird_size);
3381
3382         if (iwarp_info->ord_size == 1)
3383                 iwarp_info->ord_size = 2;
3384
3385         iwarp_info->rd_enable = true;
3386         iwarp_info->rdmap_ver = 1;
3387         iwarp_info->ddp_ver = 1;
3388
3389         iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id;
3390
3391         ctx_info->tcp_info_valid = true;
3392         ctx_info->iwarp_info_valid = true;
3393         ctx_info->add_to_qoslist = true;
3394         ctx_info->user_pri = cm_node->user_pri;
3395
3396         i40iw_init_tcp_ctx(cm_node, &tcp_info, iwqp);
3397         if (cm_node->snd_mark_en) {
3398                 iwarp_info->snd_mark_en = true;
3399                 iwarp_info->snd_mark_offset = (tcp_info.snd_nxt &
3400                                 SNDMARKER_SEQNMASK) + cm_node->lsmm_size;
3401         }
3402
3403         cm_node->state = I40IW_CM_STATE_OFFLOADED;
3404         tcp_info.tcp_state = I40IW_TCP_STATE_ESTABLISHED;
3405         tcp_info.src_mac_addr_idx = iwdev->mac_ip_table_idx;
3406         tcp_info.tos = cm_node->tos;
3407
3408         dev->iw_priv_qp_ops->qp_setctx(&iwqp->sc_qp, (u64 *)(iwqp->host_ctx.va), ctx_info);
3409
3410         /* once tcp_info is set, no need to do it again */
3411         ctx_info->tcp_info_valid = false;
3412         ctx_info->iwarp_info_valid = false;
3413         ctx_info->add_to_qoslist = false;
3414 }
3415
3416 /**
3417  * i40iw_cm_disconn - when a connection is being closed
3418  * @iwqp: associate qp for the connection
3419  */
3420 void i40iw_cm_disconn(struct i40iw_qp *iwqp)
3421 {
3422         struct disconn_work *work;
3423         struct i40iw_device *iwdev = iwqp->iwdev;
3424         struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3425         unsigned long flags;
3426
3427         work = kzalloc(sizeof(*work), GFP_ATOMIC);
3428         if (!work)
3429                 return; /* Timer will clean up */
3430
3431         spin_lock_irqsave(&iwdev->qptable_lock, flags);
3432         if (!iwdev->qp_table[iwqp->ibqp.qp_num]) {
3433                 spin_unlock_irqrestore(&iwdev->qptable_lock, flags);
3434                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM,
3435                             "%s qp_id %d is already freed\n",
3436                              __func__, iwqp->ibqp.qp_num);
3437                 kfree(work);
3438                 return;
3439         }
3440         i40iw_add_ref(&iwqp->ibqp);
3441         spin_unlock_irqrestore(&iwdev->qptable_lock, flags);
3442
3443         work->iwqp = iwqp;
3444         INIT_WORK(&work->work, i40iw_disconnect_worker);
3445         queue_work(cm_core->disconn_wq, &work->work);
3446         return;
3447 }
3448
3449 /**
3450  * i40iw_qp_disconnect - free qp and close cm
3451  * @iwqp: associate qp for the connection
3452  */
3453 static void i40iw_qp_disconnect(struct i40iw_qp *iwqp)
3454 {
3455         struct i40iw_device *iwdev;
3456         struct i40iw_ib_device *iwibdev;
3457
3458         iwdev = to_iwdev(iwqp->ibqp.device);
3459         if (!iwdev) {
3460                 i40iw_pr_err("iwdev == NULL\n");
3461                 return;
3462         }
3463
3464         iwibdev = iwdev->iwibdev;
3465
3466         if (iwqp->active_conn) {
3467                 /* indicate this connection is NOT active */
3468                 iwqp->active_conn = 0;
3469         } else {
3470                 /* Need to free the Last Streaming Mode Message */
3471                 if (iwqp->ietf_mem.va) {
3472                         if (iwqp->lsmm_mr)
3473                                 iwibdev->ibdev.dereg_mr(iwqp->lsmm_mr);
3474                         i40iw_free_dma_mem(iwdev->sc_dev.hw, &iwqp->ietf_mem);
3475                 }
3476         }
3477
3478         /* close the CM node down if it is still active */
3479         if (iwqp->cm_node) {
3480                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "%s Call close API\n", __func__);
3481                 i40iw_cm_close(iwqp->cm_node);
3482         }
3483 }
3484
3485 /**
3486  * i40iw_cm_disconn_true - called by worker thread to disconnect qp
3487  * @iwqp: associate qp for the connection
3488  */
3489 static void i40iw_cm_disconn_true(struct i40iw_qp *iwqp)
3490 {
3491         struct iw_cm_id *cm_id;
3492         struct i40iw_device *iwdev;
3493         struct i40iw_sc_qp *qp = &iwqp->sc_qp;
3494         u16 last_ae;
3495         u8 original_hw_tcp_state;
3496         u8 original_ibqp_state;
3497         int disconn_status = 0;
3498         int issue_disconn = 0;
3499         int issue_close = 0;
3500         int issue_flush = 0;
3501         struct ib_event ibevent;
3502         unsigned long flags;
3503         int ret;
3504
3505         if (!iwqp) {
3506                 i40iw_pr_err("iwqp == NULL\n");
3507                 return;
3508         }
3509
3510         spin_lock_irqsave(&iwqp->lock, flags);
3511         cm_id = iwqp->cm_id;
3512         /* make sure we havent already closed this connection */
3513         if (!cm_id) {
3514                 spin_unlock_irqrestore(&iwqp->lock, flags);
3515                 return;
3516         }
3517
3518         iwdev = to_iwdev(iwqp->ibqp.device);
3519
3520         original_hw_tcp_state = iwqp->hw_tcp_state;
3521         original_ibqp_state = iwqp->ibqp_state;
3522         last_ae = iwqp->last_aeq;
3523
3524         if (qp->term_flags) {
3525                 issue_disconn = 1;
3526                 issue_close = 1;
3527                 iwqp->cm_id = NULL;
3528                 /*When term timer expires after cm_timer, don't want
3529                  *terminate-handler to issue cm_disconn which can re-free
3530                  *a QP even after its refcnt=0.
3531                  */
3532                 i40iw_terminate_del_timer(qp);
3533                 if (!iwqp->flush_issued) {
3534                         iwqp->flush_issued = 1;
3535                         issue_flush = 1;
3536                 }
3537         } else if ((original_hw_tcp_state == I40IW_TCP_STATE_CLOSE_WAIT) ||
3538                    ((original_ibqp_state == IB_QPS_RTS) &&
3539                     (last_ae == I40IW_AE_LLP_CONNECTION_RESET))) {
3540                 issue_disconn = 1;
3541                 if (last_ae == I40IW_AE_LLP_CONNECTION_RESET)
3542                         disconn_status = -ECONNRESET;
3543         }
3544
3545         if (((original_hw_tcp_state == I40IW_TCP_STATE_CLOSED) ||
3546              (original_hw_tcp_state == I40IW_TCP_STATE_TIME_WAIT) ||
3547              (last_ae == I40IW_AE_RDMAP_ROE_BAD_LLP_CLOSE) ||
3548              (last_ae == I40IW_AE_LLP_CONNECTION_RESET) ||
3549               iwdev->reset)) {
3550                 issue_close = 1;
3551                 iwqp->cm_id = NULL;
3552                 if (!iwqp->flush_issued) {
3553                         iwqp->flush_issued = 1;
3554                         issue_flush = 1;
3555                 }
3556         }
3557
3558         spin_unlock_irqrestore(&iwqp->lock, flags);
3559         if (issue_flush && !iwqp->destroyed) {
3560                 /* Flush the queues */
3561                 i40iw_flush_wqes(iwdev, iwqp);
3562
3563                 if (qp->term_flags && iwqp->ibqp.event_handler) {
3564                         ibevent.device = iwqp->ibqp.device;
3565                         ibevent.event = (qp->eventtype == TERM_EVENT_QP_FATAL) ?
3566                                         IB_EVENT_QP_FATAL : IB_EVENT_QP_ACCESS_ERR;
3567                         ibevent.element.qp = &iwqp->ibqp;
3568                         iwqp->ibqp.event_handler(&ibevent, iwqp->ibqp.qp_context);
3569                 }
3570         }
3571
3572         if (cm_id && cm_id->event_handler) {
3573                 if (issue_disconn) {
3574                         ret = i40iw_send_cm_event(NULL,
3575                                                   cm_id,
3576                                                   IW_CM_EVENT_DISCONNECT,
3577                                                   disconn_status);
3578
3579                         if (ret)
3580                                 i40iw_debug(&iwdev->sc_dev,
3581                                             I40IW_DEBUG_CM,
3582                                             "disconnect event failed %s: - cm_id = %p\n",
3583                                             __func__, cm_id);
3584                 }
3585                 if (issue_close) {
3586                         i40iw_qp_disconnect(iwqp);
3587                         cm_id->provider_data = iwqp;
3588                         ret = i40iw_send_cm_event(NULL, cm_id, IW_CM_EVENT_CLOSE, 0);
3589                         if (ret)
3590                                 i40iw_debug(&iwdev->sc_dev,
3591                                             I40IW_DEBUG_CM,
3592                                             "close event failed %s: - cm_id = %p\n",
3593                                             __func__, cm_id);
3594                         cm_id->rem_ref(cm_id);
3595                 }
3596         }
3597 }
3598
3599 /**
3600  * i40iw_disconnect_worker - worker for connection close
3601  * @work: points or disconn structure
3602  */
3603 static void i40iw_disconnect_worker(struct work_struct *work)
3604 {
3605         struct disconn_work *dwork = container_of(work, struct disconn_work, work);
3606         struct i40iw_qp *iwqp = dwork->iwqp;
3607
3608         kfree(dwork);
3609         i40iw_cm_disconn_true(iwqp);
3610         i40iw_rem_ref(&iwqp->ibqp);
3611 }
3612
3613 /**
3614  * i40iw_accept - registered call for connection to be accepted
3615  * @cm_id: cm information for passive connection
3616  * @conn_param: accpet parameters
3617  */
3618 int i40iw_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3619 {
3620         struct ib_qp *ibqp;
3621         struct i40iw_qp *iwqp;
3622         struct i40iw_device *iwdev;
3623         struct i40iw_sc_dev *dev;
3624         struct i40iw_cm_core *cm_core;
3625         struct i40iw_cm_node *cm_node;
3626         struct ib_qp_attr attr;
3627         int passive_state;
3628         struct ib_mr *ibmr;
3629         struct i40iw_pd *iwpd;
3630         u16 buf_len = 0;
3631         struct i40iw_kmem_info accept;
3632         enum i40iw_status_code status;
3633         u64 tagged_offset;
3634         unsigned long flags;
3635
3636         memset(&attr, 0, sizeof(attr));
3637         ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn);
3638         if (!ibqp)
3639                 return -EINVAL;
3640
3641         iwqp = to_iwqp(ibqp);
3642         iwdev = iwqp->iwdev;
3643         dev = &iwdev->sc_dev;
3644         cm_core = &iwdev->cm_core;
3645         cm_node = (struct i40iw_cm_node *)cm_id->provider_data;
3646
3647         if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) {
3648                 cm_node->ipv4 = true;
3649                 cm_node->vlan_id = i40iw_get_vlan_ipv4(cm_node->loc_addr);
3650         } else {
3651                 cm_node->ipv4 = false;
3652                 i40iw_netdev_vlan_ipv6(cm_node->loc_addr, &cm_node->vlan_id);
3653         }
3654         i40iw_debug(cm_node->dev,
3655                     I40IW_DEBUG_CM,
3656                     "Accept vlan_id=%d\n",
3657                     cm_node->vlan_id);
3658         if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
3659                 if (cm_node->loopbackpartner)
3660                         i40iw_rem_ref_cm_node(cm_node->loopbackpartner);
3661                 i40iw_rem_ref_cm_node(cm_node);
3662                 return -EINVAL;
3663         }
3664
3665         passive_state = atomic_add_return(1, &cm_node->passive_state);
3666         if (passive_state == I40IW_SEND_RESET_EVENT) {
3667                 i40iw_rem_ref_cm_node(cm_node);
3668                 return -ECONNRESET;
3669         }
3670
3671         cm_node->cm_core->stats_accepts++;
3672         iwqp->cm_node = (void *)cm_node;
3673         cm_node->iwqp = iwqp;
3674
3675         buf_len = conn_param->private_data_len + I40IW_MAX_IETF_SIZE;
3676
3677         status = i40iw_allocate_dma_mem(dev->hw, &iwqp->ietf_mem, buf_len, 1);
3678
3679         if (status)
3680                 return -ENOMEM;
3681         cm_node->pdata.size = conn_param->private_data_len;
3682         accept.addr = iwqp->ietf_mem.va;
3683         accept.size = i40iw_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY);
3684         memcpy(accept.addr + accept.size, conn_param->private_data,
3685                conn_param->private_data_len);
3686
3687         /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3688         if ((cm_node->ipv4 &&
3689              !i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
3690             (!cm_node->ipv4 &&
3691              !i40iw_ipv6_is_loopback(cm_node->loc_addr, cm_node->rem_addr))) {
3692                 iwpd = iwqp->iwpd;
3693                 tagged_offset = (uintptr_t)iwqp->ietf_mem.va;
3694                 ibmr = i40iw_reg_phys_mr(&iwpd->ibpd,
3695                                          iwqp->ietf_mem.pa,
3696                                          buf_len,
3697                                          IB_ACCESS_LOCAL_WRITE,
3698                                          &tagged_offset);
3699                 if (IS_ERR(ibmr)) {
3700                         i40iw_free_dma_mem(dev->hw, &iwqp->ietf_mem);
3701                         return -ENOMEM;
3702                 }
3703
3704                 ibmr->pd = &iwpd->ibpd;
3705                 ibmr->device = iwpd->ibpd.device;
3706                 iwqp->lsmm_mr = ibmr;
3707                 if (iwqp->page)
3708                         iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
3709                 dev->iw_priv_qp_ops->qp_send_lsmm(&iwqp->sc_qp,
3710                                                         iwqp->ietf_mem.va,
3711                                                         (accept.size + conn_param->private_data_len),
3712                                                         ibmr->lkey);
3713
3714         } else {
3715                 if (iwqp->page)
3716                         iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
3717                 dev->iw_priv_qp_ops->qp_send_lsmm(&iwqp->sc_qp, NULL, 0, 0);
3718         }
3719
3720         if (iwqp->page)
3721                 kunmap(iwqp->page);
3722
3723         iwqp->cm_id = cm_id;
3724         cm_node->cm_id = cm_id;
3725
3726         cm_id->provider_data = (void *)iwqp;
3727         iwqp->active_conn = 0;
3728
3729         cm_node->lsmm_size = accept.size + conn_param->private_data_len;
3730         i40iw_cm_init_tsa_conn(iwqp, cm_node);
3731         cm_id->add_ref(cm_id);
3732         i40iw_add_ref(&iwqp->ibqp);
3733
3734         attr.qp_state = IB_QPS_RTS;
3735         cm_node->qhash_set = false;
3736         i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
3737
3738         cm_node->accelerated = true;
3739         spin_lock_irqsave(&cm_core->ht_lock, flags);
3740         list_move_tail(&cm_node->list, &cm_core->accelerated_list);
3741         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
3742
3743         status =
3744                 i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0);
3745         if (status)
3746                 i40iw_debug(dev, I40IW_DEBUG_CM, "error sending cm event - ESTABLISHED\n");
3747
3748         if (cm_node->loopbackpartner) {
3749                 cm_node->loopbackpartner->pdata.size = conn_param->private_data_len;
3750
3751                 /* copy entire MPA frame to our cm_node's frame */
3752                 memcpy(cm_node->loopbackpartner->pdata_buf,
3753                        conn_param->private_data,
3754                        conn_param->private_data_len);
3755                 i40iw_create_event(cm_node->loopbackpartner, I40IW_CM_EVENT_CONNECTED);
3756         }
3757
3758         if (cm_node->accept_pend) {
3759                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
3760                 cm_node->accept_pend = 0;
3761         }
3762         return 0;
3763 }
3764
3765 /**
3766  * i40iw_reject - registered call for connection to be rejected
3767  * @cm_id: cm information for passive connection
3768  * @pdata: private data to be sent
3769  * @pdata_len: private data length
3770  */
3771 int i40iw_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3772 {
3773         struct i40iw_device *iwdev;
3774         struct i40iw_cm_node *cm_node;
3775         struct i40iw_cm_node *loopback;
3776
3777         cm_node = (struct i40iw_cm_node *)cm_id->provider_data;
3778         loopback = cm_node->loopbackpartner;
3779         cm_node->cm_id = cm_id;
3780         cm_node->pdata.size = pdata_len;
3781
3782         iwdev = to_iwdev(cm_id->device);
3783         if (!iwdev)
3784                 return -EINVAL;
3785         cm_node->cm_core->stats_rejects++;
3786
3787         if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER)
3788                 return -EINVAL;
3789
3790         if (loopback) {
3791                 memcpy(&loopback->pdata_buf, pdata, pdata_len);
3792                 loopback->pdata.size = pdata_len;
3793         }
3794
3795         return i40iw_cm_reject(cm_node, pdata, pdata_len);
3796 }
3797
3798 /**
3799  * i40iw_connect - registered call for connection to be established
3800  * @cm_id: cm information for passive connection
3801  * @conn_param: Information about the connection
3802  */
3803 int i40iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3804 {
3805         struct ib_qp *ibqp;
3806         struct i40iw_qp *iwqp;
3807         struct i40iw_device *iwdev;
3808         struct i40iw_cm_node *cm_node;
3809         struct i40iw_cm_info cm_info;
3810         struct sockaddr_in *laddr;
3811         struct sockaddr_in *raddr;
3812         struct sockaddr_in6 *laddr6;
3813         struct sockaddr_in6 *raddr6;
3814         int ret = 0;
3815
3816         ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn);
3817         if (!ibqp)
3818                 return -EINVAL;
3819         iwqp = to_iwqp(ibqp);
3820         if (!iwqp)
3821                 return -EINVAL;
3822         iwdev = to_iwdev(iwqp->ibqp.device);
3823         if (!iwdev)
3824                 return -EINVAL;
3825
3826         laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3827         raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
3828         laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3829         raddr6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr;
3830
3831         if (!(laddr->sin_port) || !(raddr->sin_port))
3832                 return -EINVAL;
3833
3834         iwqp->active_conn = 1;
3835         iwqp->cm_id = NULL;
3836         cm_id->provider_data = iwqp;
3837
3838         /* set up the connection params for the node */
3839         if (cm_id->remote_addr.ss_family == AF_INET) {
3840                 cm_info.ipv4 = true;
3841                 memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr));
3842                 memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr));
3843                 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3844                 cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr);
3845                 cm_info.loc_port = ntohs(laddr->sin_port);
3846                 cm_info.rem_port = ntohs(raddr->sin_port);
3847                 cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr);
3848         } else {
3849                 cm_info.ipv4 = false;
3850                 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3851                                     laddr6->sin6_addr.in6_u.u6_addr32);
3852                 i40iw_copy_ip_ntohl(cm_info.rem_addr,
3853                                     raddr6->sin6_addr.in6_u.u6_addr32);
3854                 cm_info.loc_port = ntohs(laddr6->sin6_port);
3855                 cm_info.rem_port = ntohs(raddr6->sin6_port);
3856                 i40iw_netdev_vlan_ipv6(cm_info.loc_addr, &cm_info.vlan_id);
3857         }
3858         cm_info.cm_id = cm_id;
3859         cm_info.tos = cm_id->tos;
3860         cm_info.user_pri = rt_tos2priority(cm_id->tos);
3861         i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_DCB, "%s TOS:[%d] UP:[%d]\n",
3862                     __func__, cm_id->tos, cm_info.user_pri);
3863         cm_id->add_ref(cm_id);
3864         cm_node = i40iw_create_cm_node(&iwdev->cm_core, iwdev,
3865                                        conn_param, &cm_info);
3866
3867         if (IS_ERR(cm_node)) {
3868                 ret = PTR_ERR(cm_node);
3869                 cm_id->rem_ref(cm_id);
3870                 return ret;
3871         }
3872
3873         if ((cm_info.ipv4 && (laddr->sin_addr.s_addr != raddr->sin_addr.s_addr)) ||
3874             (!cm_info.ipv4 && memcmp(laddr6->sin6_addr.in6_u.u6_addr32,
3875                                      raddr6->sin6_addr.in6_u.u6_addr32,
3876                                      sizeof(laddr6->sin6_addr.in6_u.u6_addr32)))) {
3877                 if (i40iw_manage_qhash(iwdev, &cm_info, I40IW_QHASH_TYPE_TCP_ESTABLISHED,
3878                                        I40IW_QHASH_MANAGE_TYPE_ADD, NULL, true)) {
3879                         ret = -EINVAL;
3880                         goto err;
3881                 }
3882                 cm_node->qhash_set = true;
3883         }
3884
3885         if (i40iw_manage_apbvt(iwdev, cm_info.loc_port,
3886                                I40IW_MANAGE_APBVT_ADD)) {
3887                 ret =  -EINVAL;
3888                 goto err;
3889         }
3890
3891         cm_node->apbvt_set = true;
3892         iwqp->cm_node = cm_node;
3893         cm_node->iwqp = iwqp;
3894         iwqp->cm_id = cm_id;
3895         i40iw_add_ref(&iwqp->ibqp);
3896
3897         if (cm_node->state != I40IW_CM_STATE_OFFLOADED) {
3898                 cm_node->state = I40IW_CM_STATE_SYN_SENT;
3899                 ret = i40iw_send_syn(cm_node, 0);
3900                 if (ret)
3901                         goto err;
3902         }
3903
3904         if (cm_node->loopbackpartner) {
3905                 cm_node->loopbackpartner->state = I40IW_CM_STATE_MPAREQ_RCVD;
3906                 i40iw_create_event(cm_node->loopbackpartner,
3907                                    I40IW_CM_EVENT_MPA_REQ);
3908         }
3909
3910         i40iw_debug(cm_node->dev,
3911                     I40IW_DEBUG_CM,
3912                     "Api - connect(): port=0x%04x, cm_node=%p, cm_id = %p.\n",
3913                     cm_node->rem_port,
3914                     cm_node,
3915                     cm_node->cm_id);
3916
3917         return 0;
3918
3919 err:
3920         if (cm_info.ipv4)
3921                 i40iw_debug(&iwdev->sc_dev,
3922                             I40IW_DEBUG_CM,
3923                             "Api - connect() FAILED: dest addr=%pI4",
3924                             cm_info.rem_addr);
3925         else
3926                 i40iw_debug(&iwdev->sc_dev,
3927                             I40IW_DEBUG_CM,
3928                             "Api - connect() FAILED: dest addr=%pI6",
3929                             cm_info.rem_addr);
3930
3931         i40iw_rem_ref_cm_node(cm_node);
3932         cm_id->rem_ref(cm_id);
3933         iwdev->cm_core.stats_connect_errs++;
3934         return ret;
3935 }
3936
3937 /**
3938  * i40iw_create_listen - registered call creating listener
3939  * @cm_id: cm information for passive connection
3940  * @backlog: to max accept pending count
3941  */
3942 int i40iw_create_listen(struct iw_cm_id *cm_id, int backlog)
3943 {
3944         struct i40iw_device *iwdev;
3945         struct i40iw_cm_listener *cm_listen_node;
3946         struct i40iw_cm_info cm_info;
3947         enum i40iw_status_code ret;
3948         struct sockaddr_in *laddr;
3949         struct sockaddr_in6 *laddr6;
3950         bool wildcard = false;
3951
3952         iwdev = to_iwdev(cm_id->device);
3953         if (!iwdev)
3954                 return -EINVAL;
3955
3956         laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3957         laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3958         memset(&cm_info, 0, sizeof(cm_info));
3959         if (laddr->sin_family == AF_INET) {
3960                 cm_info.ipv4 = true;
3961                 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3962                 cm_info.loc_port = ntohs(laddr->sin_port);
3963
3964                 if (laddr->sin_addr.s_addr != INADDR_ANY)
3965                         cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr);
3966                 else
3967                         wildcard = true;
3968
3969         } else {
3970                 cm_info.ipv4 = false;
3971                 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3972                                     laddr6->sin6_addr.in6_u.u6_addr32);
3973                 cm_info.loc_port = ntohs(laddr6->sin6_port);
3974                 if (ipv6_addr_type(&laddr6->sin6_addr) != IPV6_ADDR_ANY)
3975                         i40iw_netdev_vlan_ipv6(cm_info.loc_addr,
3976                                                &cm_info.vlan_id);
3977                 else
3978                         wildcard = true;
3979         }
3980         cm_info.backlog = backlog;
3981         cm_info.cm_id = cm_id;
3982
3983         cm_listen_node = i40iw_make_listen_node(&iwdev->cm_core, iwdev, &cm_info);
3984         if (!cm_listen_node) {
3985                 i40iw_pr_err("cm_listen_node == NULL\n");
3986                 return -ENOMEM;
3987         }
3988
3989         cm_id->provider_data = cm_listen_node;
3990
3991         cm_listen_node->tos = cm_id->tos;
3992         cm_listen_node->user_pri = rt_tos2priority(cm_id->tos);
3993         cm_info.user_pri = cm_listen_node->user_pri;
3994
3995         if (!cm_listen_node->reused_node) {
3996                 if (wildcard) {
3997                         if (cm_info.ipv4)
3998                                 ret = i40iw_add_mqh_4(iwdev,
3999                                                       &cm_info,
4000                                                       cm_listen_node);
4001                         else
4002                                 ret = i40iw_add_mqh_6(iwdev,
4003                                                       &cm_info,
4004                                                       cm_listen_node);
4005                         if (ret)
4006                                 goto error;
4007
4008                         ret = i40iw_manage_apbvt(iwdev,
4009                                                  cm_info.loc_port,
4010                                                  I40IW_MANAGE_APBVT_ADD);
4011
4012                         if (ret)
4013                                 goto error;
4014                 } else {
4015                         ret = i40iw_manage_qhash(iwdev,
4016                                                  &cm_info,
4017                                                  I40IW_QHASH_TYPE_TCP_SYN,
4018                                                  I40IW_QHASH_MANAGE_TYPE_ADD,
4019                                                  NULL,
4020                                                  true);
4021                         if (ret)
4022                                 goto error;
4023                         cm_listen_node->qhash_set = true;
4024                         ret = i40iw_manage_apbvt(iwdev,
4025                                                  cm_info.loc_port,
4026                                                  I40IW_MANAGE_APBVT_ADD);
4027                         if (ret)
4028                                 goto error;
4029                 }
4030         }
4031         cm_id->add_ref(cm_id);
4032         cm_listen_node->cm_core->stats_listen_created++;
4033         return 0;
4034  error:
4035         i40iw_cm_del_listen(&iwdev->cm_core, (void *)cm_listen_node, false);
4036         return -EINVAL;
4037 }
4038
4039 /**
4040  * i40iw_destroy_listen - registered call to destroy listener
4041  * @cm_id: cm information for passive connection
4042  */
4043 int i40iw_destroy_listen(struct iw_cm_id *cm_id)
4044 {
4045         struct i40iw_device *iwdev;
4046
4047         iwdev = to_iwdev(cm_id->device);
4048         if (cm_id->provider_data)
4049                 i40iw_cm_del_listen(&iwdev->cm_core, cm_id->provider_data, true);
4050         else
4051                 i40iw_pr_err("cm_id->provider_data was NULL\n");
4052
4053         cm_id->rem_ref(cm_id);
4054
4055         return 0;
4056 }
4057
4058 /**
4059  * i40iw_cm_event_connected - handle connected active node
4060  * @event: the info for cm_node of connection
4061  */
4062 static void i40iw_cm_event_connected(struct i40iw_cm_event *event)
4063 {
4064         struct i40iw_qp *iwqp;
4065         struct i40iw_device *iwdev;
4066         struct i40iw_cm_core *cm_core;
4067         struct i40iw_cm_node *cm_node;
4068         struct i40iw_sc_dev *dev;
4069         struct ib_qp_attr attr;
4070         struct iw_cm_id *cm_id;
4071         unsigned long flags;
4072         int status;
4073         bool read0;
4074
4075         cm_node = event->cm_node;
4076         cm_id = cm_node->cm_id;
4077         iwqp = (struct i40iw_qp *)cm_id->provider_data;
4078         iwdev = to_iwdev(iwqp->ibqp.device);
4079         dev = &iwdev->sc_dev;
4080         cm_core = &iwdev->cm_core;
4081
4082         if (iwqp->destroyed) {
4083                 status = -ETIMEDOUT;
4084                 goto error;
4085         }
4086         i40iw_cm_init_tsa_conn(iwqp, cm_node);
4087         read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO);
4088         if (iwqp->page)
4089                 iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
4090         dev->iw_priv_qp_ops->qp_send_rtt(&iwqp->sc_qp, read0);
4091         if (iwqp->page)
4092                 kunmap(iwqp->page);
4093
4094         memset(&attr, 0, sizeof(attr));
4095         attr.qp_state = IB_QPS_RTS;
4096         cm_node->qhash_set = false;
4097         i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
4098
4099         cm_node->accelerated = true;
4100         spin_lock_irqsave(&cm_core->ht_lock, flags);
4101         list_move_tail(&cm_node->list, &cm_core->accelerated_list);
4102         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
4103         status = i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY,
4104                                      0);
4105         if (status)
4106                 i40iw_debug(dev, I40IW_DEBUG_CM, "error sending cm event - CONNECT_REPLY\n");
4107
4108         return;
4109
4110 error:
4111         iwqp->cm_id = NULL;
4112         cm_id->provider_data = NULL;
4113         i40iw_send_cm_event(event->cm_node,
4114                             cm_id,
4115                             IW_CM_EVENT_CONNECT_REPLY,
4116                             status);
4117         cm_id->rem_ref(cm_id);
4118         i40iw_rem_ref_cm_node(event->cm_node);
4119 }
4120
4121 /**
4122  * i40iw_cm_event_reset - handle reset
4123  * @event: the info for cm_node of connection
4124  */
4125 static void i40iw_cm_event_reset(struct i40iw_cm_event *event)
4126 {
4127         struct i40iw_cm_node *cm_node = event->cm_node;
4128         struct iw_cm_id   *cm_id = cm_node->cm_id;
4129         struct i40iw_qp *iwqp;
4130
4131         if (!cm_id)
4132                 return;
4133
4134         iwqp = cm_id->provider_data;
4135         if (!iwqp)
4136                 return;
4137
4138         i40iw_debug(cm_node->dev,
4139                     I40IW_DEBUG_CM,
4140                     "reset event %p - cm_id = %p\n",
4141                      event->cm_node, cm_id);
4142         iwqp->cm_id = NULL;
4143
4144         i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT, -ECONNRESET);
4145         i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0);
4146 }
4147
4148 /**
4149  * i40iw_cm_event_handler - worker thread callback to send event to cm upper layer
4150  * @work: pointer of cm event info.
4151  */
4152 static void i40iw_cm_event_handler(struct work_struct *work)
4153 {
4154         struct i40iw_cm_event *event = container_of(work,
4155                                                     struct i40iw_cm_event,
4156                                                     event_work);
4157         struct i40iw_cm_node *cm_node;
4158
4159         if (!event || !event->cm_node || !event->cm_node->cm_core)
4160                 return;
4161
4162         cm_node = event->cm_node;
4163
4164         switch (event->type) {
4165         case I40IW_CM_EVENT_MPA_REQ:
4166                 i40iw_send_cm_event(cm_node,
4167                                     cm_node->cm_id,
4168                                     IW_CM_EVENT_CONNECT_REQUEST,
4169                                     0);
4170                 break;
4171         case I40IW_CM_EVENT_RESET:
4172                 i40iw_cm_event_reset(event);
4173                 break;
4174         case I40IW_CM_EVENT_CONNECTED:
4175                 if (!event->cm_node->cm_id ||
4176                     (event->cm_node->state != I40IW_CM_STATE_OFFLOADED))
4177                         break;
4178                 i40iw_cm_event_connected(event);
4179                 break;
4180         case I40IW_CM_EVENT_MPA_REJECT:
4181                 if (!event->cm_node->cm_id ||
4182                     (cm_node->state == I40IW_CM_STATE_OFFLOADED))
4183                         break;
4184                 i40iw_send_cm_event(cm_node,
4185                                     cm_node->cm_id,
4186                                     IW_CM_EVENT_CONNECT_REPLY,
4187                                     -ECONNREFUSED);
4188                 break;
4189         case I40IW_CM_EVENT_ABORTED:
4190                 if (!event->cm_node->cm_id ||
4191                     (event->cm_node->state == I40IW_CM_STATE_OFFLOADED))
4192                         break;
4193                 i40iw_event_connect_error(event);
4194                 break;
4195         default:
4196                 i40iw_pr_err("event type = %d\n", event->type);
4197                 break;
4198         }
4199
4200         event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
4201         i40iw_rem_ref_cm_node(event->cm_node);
4202         kfree(event);
4203 }
4204
4205 /**
4206  * i40iw_cm_post_event - queue event request for worker thread
4207  * @event: cm node's info for up event call
4208  */
4209 static void i40iw_cm_post_event(struct i40iw_cm_event *event)
4210 {
4211         atomic_inc(&event->cm_node->ref_count);
4212         event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
4213         INIT_WORK(&event->event_work, i40iw_cm_event_handler);
4214
4215         queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
4216 }
4217
4218 /**
4219  * i40iw_qhash_ctrl - enable/disable qhash for list
4220  * @iwdev: device pointer
4221  * @parent_listen_node: parent listen node
4222  * @nfo: cm info node
4223  * @ipaddr: Pointer to IPv4 or IPv6 address
4224  * @ipv4: flag indicating IPv4 when true
4225  * @ifup: flag indicating interface up when true
4226  *
4227  * Enables or disables the qhash for the node in the child
4228  * listen list that matches ipaddr. If no matching IP was found
4229  * it will allocate and add a new child listen node to the
4230  * parent listen node. The listen_list_lock is assumed to be
4231  * held when called.
4232  */
4233 static void i40iw_qhash_ctrl(struct i40iw_device *iwdev,
4234                              struct i40iw_cm_listener *parent_listen_node,
4235                              struct i40iw_cm_info *nfo,
4236                              u32 *ipaddr, bool ipv4, bool ifup)
4237 {
4238         struct list_head *child_listen_list = &parent_listen_node->child_listen_list;
4239         struct i40iw_cm_listener *child_listen_node;
4240         struct list_head *pos, *tpos;
4241         enum i40iw_status_code ret;
4242         bool node_allocated = false;
4243         enum i40iw_quad_hash_manage_type op =
4244                 ifup ? I40IW_QHASH_MANAGE_TYPE_ADD : I40IW_QHASH_MANAGE_TYPE_DELETE;
4245
4246         list_for_each_safe(pos, tpos, child_listen_list) {
4247                 child_listen_node =
4248                         list_entry(pos,
4249                                    struct i40iw_cm_listener,
4250                                    child_listen_list);
4251                 if (!memcmp(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16))
4252                         goto set_qhash;
4253         }
4254
4255         /* if not found then add a child listener if interface is going up */
4256         if (!ifup)
4257                 return;
4258         child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
4259         if (!child_listen_node)
4260                 return;
4261         node_allocated = true;
4262         memcpy(child_listen_node, parent_listen_node, sizeof(*child_listen_node));
4263
4264         memcpy(child_listen_node->loc_addr, ipaddr,  ipv4 ? 4 : 16);
4265
4266 set_qhash:
4267         memcpy(nfo->loc_addr,
4268                child_listen_node->loc_addr,
4269                sizeof(nfo->loc_addr));
4270         nfo->vlan_id = child_listen_node->vlan_id;
4271         ret = i40iw_manage_qhash(iwdev, nfo,
4272                                  I40IW_QHASH_TYPE_TCP_SYN,
4273                                  op,
4274                                  NULL, false);
4275         if (!ret) {
4276                 child_listen_node->qhash_set = ifup;
4277                 if (node_allocated)
4278                         list_add(&child_listen_node->child_listen_list,
4279                                  &parent_listen_node->child_listen_list);
4280         } else if (node_allocated) {
4281                 kfree(child_listen_node);
4282         }
4283 }
4284
4285 /**
4286  * i40iw_cm_teardown_connections - teardown QPs
4287  * @iwdev: device pointer
4288  * @ipaddr: Pointer to IPv4 or IPv6 address
4289  * @ipv4: flag indicating IPv4 when true
4290  * @disconnect_all: flag indicating disconnect all QPs
4291  * teardown QPs where source or destination addr matches ip addr
4292  */
4293 void i40iw_cm_teardown_connections(struct i40iw_device *iwdev, u32 *ipaddr,
4294                                    struct i40iw_cm_info *nfo,
4295                                    bool disconnect_all)
4296 {
4297         struct i40iw_cm_core *cm_core = &iwdev->cm_core;
4298         struct list_head *list_core_temp;
4299         struct list_head *list_node;
4300         struct i40iw_cm_node *cm_node;
4301         unsigned long flags;
4302         struct list_head teardown_list;
4303         struct ib_qp_attr attr;
4304
4305         INIT_LIST_HEAD(&teardown_list);
4306         spin_lock_irqsave(&cm_core->ht_lock, flags);
4307         list_for_each_safe(list_node, list_core_temp,
4308                            &cm_core->accelerated_list) {
4309                 cm_node = container_of(list_node, struct i40iw_cm_node, list);
4310                 if (disconnect_all ||
4311                     (nfo->vlan_id == cm_node->vlan_id &&
4312                     (!memcmp(cm_node->loc_addr, ipaddr, nfo->ipv4 ? 4 : 16) ||
4313                      !memcmp(cm_node->rem_addr, ipaddr, nfo->ipv4 ? 4 : 16)))) {
4314                         atomic_inc(&cm_node->ref_count);
4315                         list_add(&cm_node->teardown_entry, &teardown_list);
4316                 }
4317         }
4318         list_for_each_safe(list_node, list_core_temp,
4319                            &cm_core->non_accelerated_list) {
4320                 cm_node = container_of(list_node, struct i40iw_cm_node, list);
4321                 if (disconnect_all ||
4322                     (nfo->vlan_id == cm_node->vlan_id &&
4323                     (!memcmp(cm_node->loc_addr, ipaddr, nfo->ipv4 ? 4 : 16) ||
4324                      !memcmp(cm_node->rem_addr, ipaddr, nfo->ipv4 ? 4 : 16)))) {
4325                         atomic_inc(&cm_node->ref_count);
4326                         list_add(&cm_node->teardown_entry, &teardown_list);
4327                 }
4328         }
4329         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
4330
4331         list_for_each_safe(list_node, list_core_temp, &teardown_list) {
4332                 cm_node = container_of(list_node, struct i40iw_cm_node,
4333                                        teardown_entry);
4334                 attr.qp_state = IB_QPS_ERR;
4335                 i40iw_modify_qp(&cm_node->iwqp->ibqp, &attr, IB_QP_STATE, NULL);
4336                 if (iwdev->reset)
4337                         i40iw_cm_disconn(cm_node->iwqp);
4338                 i40iw_rem_ref_cm_node(cm_node);
4339         }
4340 }
4341
4342 /**
4343  * i40iw_ifdown_notify - process an ifdown on an interface
4344  * @iwdev: device pointer
4345  * @ipaddr: Pointer to IPv4 or IPv6 address
4346  * @ipv4: flag indicating IPv4 when true
4347  * @ifup: flag indicating interface up when true
4348  */
4349 void i40iw_if_notify(struct i40iw_device *iwdev, struct net_device *netdev,
4350                      u32 *ipaddr, bool ipv4, bool ifup)
4351 {
4352         struct i40iw_cm_core *cm_core = &iwdev->cm_core;
4353         unsigned long flags;
4354         struct i40iw_cm_listener *listen_node;
4355         static const u32 ip_zero[4] = { 0, 0, 0, 0 };
4356         struct i40iw_cm_info nfo;
4357         u16 vlan_id = rdma_vlan_dev_vlan_id(netdev);
4358         enum i40iw_status_code ret;
4359         enum i40iw_quad_hash_manage_type op =
4360                 ifup ? I40IW_QHASH_MANAGE_TYPE_ADD : I40IW_QHASH_MANAGE_TYPE_DELETE;
4361
4362         nfo.vlan_id = vlan_id;
4363         nfo.ipv4 = ipv4;
4364
4365         /* Disable or enable qhash for listeners */
4366         spin_lock_irqsave(&cm_core->listen_list_lock, flags);
4367         list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
4368                 if (vlan_id == listen_node->vlan_id &&
4369                     (!memcmp(listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16) ||
4370                     !memcmp(listen_node->loc_addr, ip_zero, ipv4 ? 4 : 16))) {
4371                         memcpy(nfo.loc_addr, listen_node->loc_addr,
4372                                sizeof(nfo.loc_addr));
4373                         nfo.loc_port = listen_node->loc_port;
4374                         nfo.user_pri = listen_node->user_pri;
4375                         if (!list_empty(&listen_node->child_listen_list)) {
4376                                 i40iw_qhash_ctrl(iwdev,
4377                                                  listen_node,
4378                                                  &nfo,
4379                                                  ipaddr, ipv4, ifup);
4380                         } else if (memcmp(listen_node->loc_addr, ip_zero,
4381                                           ipv4 ? 4 : 16)) {
4382                                 ret = i40iw_manage_qhash(iwdev,
4383                                                          &nfo,
4384                                                          I40IW_QHASH_TYPE_TCP_SYN,
4385                                                          op,
4386                                                          NULL,
4387                                                          false);
4388                                 if (!ret)
4389                                         listen_node->qhash_set = ifup;
4390                         }
4391                 }
4392         }
4393         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
4394
4395         /* teardown connected qp's on ifdown */
4396         if (!ifup)
4397                 i40iw_cm_teardown_connections(iwdev, ipaddr, &nfo, false);
4398 }