drivers/infiniband/hw/i40iw/i40iw_cm.c

   1 /*******************************************************************************
   2 *
   3 * Copyright (c) 2015-2016 Intel Corporation.  All rights reserved.
   4 *
   5 * This software is available to you under a choice of one of two
   6 * licenses.  You may choose to be licensed under the terms of the GNU
   7 * General Public License (GPL) Version 2, available from the file
   8 * COPYING in the main directory of this source tree, or the
   9 * OpenFabrics.org BSD license below:
  10 *
  11 *   Redistribution and use in source and binary forms, with or
  12 *   without modification, are permitted provided that the following
  13 *   conditions are met:
  14 *
  15 *    - Redistributions of source code must retain the above
  16 *       copyright notice, this list of conditions and the following
  17 *       disclaimer.
  18 *
  19 *    - Redistributions in binary form must reproduce the above
  20 *       copyright notice, this list of conditions and the following
  21 *       disclaimer in the documentation and/or other materials
  22 *       provided with the distribution.
  23 *
  24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  31 * SOFTWARE.
  32 *
  33 *******************************************************************************/
  34
  35 #include <linux/atomic.h>
  36 #include <linux/ip.h>
  37 #include <linux/tcp.h>
  38 #include <linux/init.h>
  39 #include <linux/if_arp.h>
  40 #include <linux/if_vlan.h>
  41 #include <linux/notifier.h>
  42 #include <linux/net.h>
  43 #include <linux/types.h>
  44 #include <linux/timer.h>
  45 #include <linux/time.h>
  46 #include <linux/delay.h>
  47 #include <linux/etherdevice.h>
  48 #include <linux/netdevice.h>
  49 #include <linux/random.h>
  50 #include <linux/list.h>
  51 #include <linux/threads.h>
  52 #include <linux/highmem.h>
  53 #include <net/arp.h>
  54 #include <net/ndisc.h>
  55 #include <net/neighbour.h>
  56 #include <net/route.h>
  57 #include <net/addrconf.h>
  58 #include <net/ip6_route.h>
  59 #include <net/ip_fib.h>
  60 #include <net/tcp.h>
  61 #include <asm/checksum.h>
  62
  63 #include "i40iw.h"
  64
  65 static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *);
  66 static void i40iw_cm_post_event(struct i40iw_cm_event *event);
  67 static void i40iw_disconnect_worker(struct work_struct *work);
  68
  69 /**
  70  * i40iw_free_sqbuf - put back puda buffer if refcount = 0
  71  * @dev: FPK device
  72  * @buf: puda buffer to free
  73  */
  74 void i40iw_free_sqbuf(struct i40iw_sc_dev *dev, void *bufp)
  75 {
  76         struct i40iw_puda_buf *buf = (struct i40iw_puda_buf *)bufp;
  77         struct i40iw_puda_rsrc *ilq = dev->ilq;
  78
  79         if (!atomic_dec_return(&buf->refcount))
  80                 i40iw_puda_ret_bufpool(ilq, buf);
  81 }
  82
  83 /**
  84  * i40iw_derive_hw_ird_setting - Calculate IRD
  85  *
  86  * @cm_ird: IRD of connection's node
  87  *
  88  * The ird from the connection is rounded to a supported HW
  89  * setting (2,8,32,64) and then encoded for ird_size field of
  90  * qp_ctx
  91  */
  92 static u8 i40iw_derive_hw_ird_setting(u16 cm_ird)
  93 {
  94         u8 encoded_ird_size;
  95         u8 pof2_cm_ird = 1;
  96
  97         /* round-off to next powerof2 */
  98         while (pof2_cm_ird < cm_ird)
  99                 pof2_cm_ird *= 2;
 100
 101         /* ird_size field is encoded in qp_ctx */
 102         switch (pof2_cm_ird) {
 103         case I40IW_HW_IRD_SETTING_64:
 104                 encoded_ird_size = 3;
 105                 break;
 106         case I40IW_HW_IRD_SETTING_32:
 107         case I40IW_HW_IRD_SETTING_16:
 108                 encoded_ird_size = 2;
 109                 break;
 110         case I40IW_HW_IRD_SETTING_8:
 111         case I40IW_HW_IRD_SETTING_4:
 112                 encoded_ird_size = 1;
 113                 break;
 114         case I40IW_HW_IRD_SETTING_2:
 115         default:
 116                 encoded_ird_size = 0;
 117                 break;
 118         }
 119         return encoded_ird_size;
 120 }
 121
 122 /**
 123  * i40iw_record_ird_ord - Record IRD/ORD passed in
 124  * @cm_node: connection's node
 125  * @conn_ird: connection IRD
 126  * @conn_ord: connection ORD
 127  */
 128 static void i40iw_record_ird_ord(struct i40iw_cm_node *cm_node, u16 conn_ird, u16 conn_ord)
 129 {
 130         if (conn_ird > I40IW_MAX_IRD_SIZE)
 131                 conn_ird = I40IW_MAX_IRD_SIZE;
 132
 133         if (conn_ord > I40IW_MAX_ORD_SIZE)
 134                 conn_ord = I40IW_MAX_ORD_SIZE;
 135
 136         cm_node->ird_size = conn_ird;
 137         cm_node->ord_size = conn_ord;
 138 }
 139
 140 /**
 141  * i40iw_copy_ip_ntohl - change network to host ip
 142  * @dst: host ip
 143  * @src: big endian
 144  */
 145 void i40iw_copy_ip_ntohl(u32 *dst, __be32 *src)
 146 {
 147         *dst++ = ntohl(*src++);
 148         *dst++ = ntohl(*src++);
 149         *dst++ = ntohl(*src++);
 150         *dst = ntohl(*src);
 151 }
 152
 153 /**
 154  * i40iw_copy_ip_htonl - change host addr to network ip
 155  * @dst: host ip
 156  * @src: little endian
 157  */
 158 static inline void i40iw_copy_ip_htonl(__be32 *dst, u32 *src)
 159 {
 160         *dst++ = htonl(*src++);
 161         *dst++ = htonl(*src++);
 162         *dst++ = htonl(*src++);
 163         *dst = htonl(*src);
 164 }
 165
 166 /**
 167  * i40iw_fill_sockaddr4 - get addr info for passive connection
 168  * @cm_node: connection's node
 169  * @event: upper layer's cm event
 170  */
 171 static inline void i40iw_fill_sockaddr4(struct i40iw_cm_node *cm_node,
 172                                         struct iw_cm_event *event)
 173 {
 174         struct sockaddr_in *laddr = (struct sockaddr_in *)&event->local_addr;
 175         struct sockaddr_in *raddr = (struct sockaddr_in *)&event->remote_addr;
 176
 177         laddr->sin_family = AF_INET;
 178         raddr->sin_family = AF_INET;
 179
 180         laddr->sin_port = htons(cm_node->loc_port);
 181         raddr->sin_port = htons(cm_node->rem_port);
 182
 183         laddr->sin_addr.s_addr = htonl(cm_node->loc_addr[0]);
 184         raddr->sin_addr.s_addr = htonl(cm_node->rem_addr[0]);
 185 }
 186
 187 /**
 188  * i40iw_fill_sockaddr6 - get ipv6 addr info for passive side
 189  * @cm_node: connection's node
 190  * @event: upper layer's cm event
 191  */
 192 static inline void i40iw_fill_sockaddr6(struct i40iw_cm_node *cm_node,
 193                                         struct iw_cm_event *event)
 194 {
 195         struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)&event->local_addr;
 196         struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)&event->remote_addr;
 197
 198         laddr6->sin6_family = AF_INET6;
 199         raddr6->sin6_family = AF_INET6;
 200
 201         laddr6->sin6_port = htons(cm_node->loc_port);
 202         raddr6->sin6_port = htons(cm_node->rem_port);
 203
 204         i40iw_copy_ip_htonl(laddr6->sin6_addr.in6_u.u6_addr32,
 205                             cm_node->loc_addr);
 206         i40iw_copy_ip_htonl(raddr6->sin6_addr.in6_u.u6_addr32,
 207                             cm_node->rem_addr);
 208 }
 209
 210 /**
 211  * i40iw_get_addr_info
 212  * @cm_node: contains ip/tcp info
 213  * @cm_info: to get a copy of the cm_node ip/tcp info
 214 */
 215 static void i40iw_get_addr_info(struct i40iw_cm_node *cm_node,
 216                                 struct i40iw_cm_info *cm_info)
 217 {
 218         cm_info->ipv4 = cm_node->ipv4;
 219         cm_info->vlan_id = cm_node->vlan_id;
 220         memcpy(cm_info->loc_addr, cm_node->loc_addr, sizeof(cm_info->loc_addr));
 221         memcpy(cm_info->rem_addr, cm_node->rem_addr, sizeof(cm_info->rem_addr));
 222         cm_info->loc_port = cm_node->loc_port;
 223         cm_info->rem_port = cm_node->rem_port;
 224 }
 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                 break;
 275         case IW_CM_EVENT_CONNECT_REPLY:
 276                 i40iw_get_cmevent_info(cm_node, cm_id, &event);
 277                 break;
 278         case IW_CM_EVENT_ESTABLISHED:
 279                 event.ird = cm_node->ird_size;
 280                 event.ord = cm_node->ord_size;
 281                 break;
 282         case IW_CM_EVENT_DISCONNECT:
 283                 break;
 284         case IW_CM_EVENT_CLOSE:
 285                 break;
 286         default:
 287                 i40iw_pr_err("event type received type = %d\n", type);
 288                 return -1;
 289         }
 290         return cm_id->event_handler(cm_id, &event);
 291 }
 292
 293 /**
 294  * i40iw_create_event - create cm event
 295  * @cm_node: connection's node
 296  * @type: Event type to generate
 297  */
 298 static struct i40iw_cm_event *i40iw_create_event(struct i40iw_cm_node *cm_node,
 299                                                  enum i40iw_cm_event_type type)
 300 {
 301         struct i40iw_cm_event *event;
 302
 303         if (!cm_node->cm_id)
 304                 return NULL;
 305
 306         event = kzalloc(sizeof(*event), GFP_ATOMIC);
 307
 308         if (!event)
 309                 return NULL;
 310
 311         event->type = type;
 312         event->cm_node = cm_node;
 313         memcpy(event->cm_info.rem_addr, cm_node->rem_addr, sizeof(event->cm_info.rem_addr));
 314         memcpy(event->cm_info.loc_addr, cm_node->loc_addr, sizeof(event->cm_info.loc_addr));
 315         event->cm_info.rem_port = cm_node->rem_port;
 316         event->cm_info.loc_port = cm_node->loc_port;
 317         event->cm_info.cm_id = cm_node->cm_id;
 318
 319         i40iw_debug(cm_node->dev,
 320                     I40IW_DEBUG_CM,
 321                     "node=%p event=%p type=%u dst=%pI4 src=%pI4\n",
 322                     cm_node,
 323                     event,
 324                     type,
 325                     event->cm_info.loc_addr,
 326                     event->cm_info.rem_addr);
 327
 328         i40iw_cm_post_event(event);
 329         return event;
 330 }
 331
 332 /**
 333  * i40iw_free_retrans_entry - free send entry
 334  * @cm_node: connection's node
 335  */
 336 static void i40iw_free_retrans_entry(struct i40iw_cm_node *cm_node)
 337 {
 338         struct i40iw_sc_dev *dev = cm_node->dev;
 339         struct i40iw_timer_entry *send_entry;
 340
 341         send_entry = cm_node->send_entry;
 342         if (send_entry) {
 343                 cm_node->send_entry = NULL;
 344                 i40iw_free_sqbuf(dev, (void *)send_entry->sqbuf);
 345                 kfree(send_entry);
 346                 atomic_dec(&cm_node->ref_count);
 347         }
 348 }
 349
 350 /**
 351  * i40iw_cleanup_retrans_entry - free send entry with lock
 352  * @cm_node: connection's node
 353  */
 354 static void i40iw_cleanup_retrans_entry(struct i40iw_cm_node *cm_node)
 355 {
 356         unsigned long flags;
 357
 358         spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
 359         i40iw_free_retrans_entry(cm_node);
 360         spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
 361 }
 362
 363 static bool is_remote_ne020_or_chelsio(struct i40iw_cm_node *cm_node)
 364 {
 365         if ((cm_node->rem_mac[0] == 0x0) &&
 366             (((cm_node->rem_mac[1] == 0x12) && (cm_node->rem_mac[2] == 0x55)) ||
 367              ((cm_node->rem_mac[1] == 0x07 && (cm_node->rem_mac[2] == 0x43)))))
 368                 return true;
 369         return false;
 370 }
 371
 372 /**
 373  * i40iw_form_cm_frame - get a free packet and build frame
 374  * @cm_node: connection's node ionfo to use in frame
 375  * @options: pointer to options info
 376  * @hdr: pointer mpa header
 377  * @pdata: pointer to private data
 378  * @flags:  indicates FIN or ACK
 379  */
 380 static struct i40iw_puda_buf *i40iw_form_cm_frame(struct i40iw_cm_node *cm_node,
 381                                                   struct i40iw_kmem_info *options,
 382                                                   struct i40iw_kmem_info *hdr,
 383                                                   struct i40iw_kmem_info *pdata,
 384                                                   u8 flags)
 385 {
 386         struct i40iw_puda_buf *sqbuf;
 387         struct i40iw_sc_dev *dev = cm_node->dev;
 388         u8 *buf;
 389
 390         struct tcphdr *tcph;
 391         struct iphdr *iph;
 392         struct ipv6hdr *ip6h;
 393         struct ethhdr *ethh;
 394         u16 packetsize;
 395         u16 eth_hlen = ETH_HLEN;
 396         u32 opts_len = 0;
 397         u32 pd_len = 0;
 398         u32 hdr_len = 0;
 399
 400         sqbuf = i40iw_puda_get_bufpool(dev->ilq);
 401         if (!sqbuf)
 402                 return NULL;
 403         buf = sqbuf->mem.va;
 404
 405         if (options)
 406                 opts_len = (u32)options->size;
 407
 408         if (hdr)
 409                 hdr_len = hdr->size;
 410
 411         if (pdata) {
 412                 pd_len = pdata->size;
 413                 if (!is_remote_ne020_or_chelsio(cm_node))
 414                         pd_len += MPA_ZERO_PAD_LEN;
 415         }
 416
 417         if (cm_node->vlan_id < VLAN_TAG_PRESENT)
 418                 eth_hlen += 4;
 419
 420         if (cm_node->ipv4)
 421                 packetsize = sizeof(*iph) + sizeof(*tcph);
 422         else
 423                 packetsize = sizeof(*ip6h) + sizeof(*tcph);
 424         packetsize += opts_len + hdr_len + pd_len;
 425
 426         memset(buf, 0x00, eth_hlen + packetsize);
 427
 428         sqbuf->totallen = packetsize + eth_hlen;
 429         sqbuf->maclen = eth_hlen;
 430         sqbuf->tcphlen = sizeof(*tcph) + opts_len;
 431         sqbuf->scratch = (void *)cm_node;
 432
 433         ethh = (struct ethhdr *)buf;
 434         buf += eth_hlen;
 435
 436         if (cm_node->ipv4) {
 437                 sqbuf->ipv4 = true;
 438
 439                 iph = (struct iphdr *)buf;
 440                 buf += sizeof(*iph);
 441                 tcph = (struct tcphdr *)buf;
 442                 buf += sizeof(*tcph);
 443
 444                 ether_addr_copy(ethh->h_dest, cm_node->rem_mac);
 445                 ether_addr_copy(ethh->h_source, cm_node->loc_mac);
 446                 if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
 447                         ((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q);
 448                         ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(cm_node->vlan_id);
 449
 450                         ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IP);
 451                 } else {
 452                         ethh->h_proto = htons(ETH_P_IP);
 453                 }
 454
 455                 iph->version = IPVERSION;
 456                 iph->ihl = 5;   /* 5 * 4Byte words, IP headr len */
 457                 iph->tos = 0;
 458                 iph->tot_len = htons(packetsize);
 459                 iph->id = htons(++cm_node->tcp_cntxt.loc_id);
 460
 461                 iph->frag_off = htons(0x4000);
 462                 iph->ttl = 0x40;
 463                 iph->protocol = IPPROTO_TCP;
 464                 iph->saddr = htonl(cm_node->loc_addr[0]);
 465                 iph->daddr = htonl(cm_node->rem_addr[0]);
 466         } else {
 467                 sqbuf->ipv4 = false;
 468                 ip6h = (struct ipv6hdr *)buf;
 469                 buf += sizeof(*ip6h);
 470                 tcph = (struct tcphdr *)buf;
 471                 buf += sizeof(*tcph);
 472
 473                 ether_addr_copy(ethh->h_dest, cm_node->rem_mac);
 474                 ether_addr_copy(ethh->h_source, cm_node->loc_mac);
 475                 if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
 476                         ((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q);
 477                         ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(cm_node->vlan_id);
 478                         ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IPV6);
 479                 } else {
 480                         ethh->h_proto = htons(ETH_P_IPV6);
 481                 }
 482                 ip6h->version = 6;
 483                 ip6h->flow_lbl[0] = 0;
 484                 ip6h->flow_lbl[1] = 0;
 485                 ip6h->flow_lbl[2] = 0;
 486                 ip6h->payload_len = htons(packetsize - sizeof(*ip6h));
 487                 ip6h->nexthdr = 6;
 488                 ip6h->hop_limit = 128;
 489                 i40iw_copy_ip_htonl(ip6h->saddr.in6_u.u6_addr32,
 490                                     cm_node->loc_addr);
 491                 i40iw_copy_ip_htonl(ip6h->daddr.in6_u.u6_addr32,
 492                                     cm_node->rem_addr);
 493         }
 494
 495         tcph->source = htons(cm_node->loc_port);
 496         tcph->dest = htons(cm_node->rem_port);
 497
 498         tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
 499
 500         if (flags & SET_ACK) {
 501                 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
 502                 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
 503                 tcph->ack = 1;
 504         } else {
 505                 tcph->ack_seq = 0;
 506         }
 507
 508         if (flags & SET_SYN) {
 509                 cm_node->tcp_cntxt.loc_seq_num++;
 510                 tcph->syn = 1;
 511         } else {
 512                 cm_node->tcp_cntxt.loc_seq_num += hdr_len + pd_len;
 513         }
 514
 515         if (flags & SET_FIN) {
 516                 cm_node->tcp_cntxt.loc_seq_num++;
 517                 tcph->fin = 1;
 518         }
 519
 520         if (flags & SET_RST)
 521                 tcph->rst = 1;
 522
 523         tcph->doff = (u16)((sizeof(*tcph) + opts_len + 3) >> 2);
 524         sqbuf->tcphlen = tcph->doff << 2;
 525         tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
 526         tcph->urg_ptr = 0;
 527
 528         if (opts_len) {
 529                 memcpy(buf, options->addr, opts_len);
 530                 buf += opts_len;
 531         }
 532
 533         if (hdr_len) {
 534                 memcpy(buf, hdr->addr, hdr_len);
 535                 buf += hdr_len;
 536         }
 537
 538         if (pd_len)
 539                 memcpy(buf, pdata->addr, pd_len);
 540
 541         atomic_set(&sqbuf->refcount, 1);
 542
 543         return sqbuf;
 544 }
 545
 546 /**
 547  * i40iw_send_reset - Send RST packet
 548  * @cm_node: connection's node
 549  */
 550 static int i40iw_send_reset(struct i40iw_cm_node *cm_node)
 551 {
 552         struct i40iw_puda_buf *sqbuf;
 553         int flags = SET_RST | SET_ACK;
 554
 555         sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, flags);
 556         if (!sqbuf) {
 557                 i40iw_pr_err("no sqbuf\n");
 558                 return -1;
 559         }
 560
 561         return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 0, 1);
 562 }
 563
 564 /**
 565  * i40iw_active_open_err - send event for active side cm error
 566  * @cm_node: connection's node
 567  * @reset: Flag to send reset or not
 568  */
 569 static void i40iw_active_open_err(struct i40iw_cm_node *cm_node, bool reset)
 570 {
 571         i40iw_cleanup_retrans_entry(cm_node);
 572         cm_node->cm_core->stats_connect_errs++;
 573         if (reset) {
 574                 i40iw_debug(cm_node->dev,
 575                             I40IW_DEBUG_CM,
 576                             "%s cm_node=%p state=%d\n",
 577                             __func__,
 578                             cm_node,
 579                             cm_node->state);
 580                 atomic_inc(&cm_node->ref_count);
 581                 i40iw_send_reset(cm_node);
 582         }
 583
 584         cm_node->state = I40IW_CM_STATE_CLOSED;
 585         i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
 586 }
 587
 588 /**
 589  * i40iw_passive_open_err - handle passive side cm error
 590  * @cm_node: connection's node
 591  * @reset: send reset or just free cm_node
 592  */
 593 static void i40iw_passive_open_err(struct i40iw_cm_node *cm_node, bool reset)
 594 {
 595         i40iw_cleanup_retrans_entry(cm_node);
 596         cm_node->cm_core->stats_passive_errs++;
 597         cm_node->state = I40IW_CM_STATE_CLOSED;
 598         i40iw_debug(cm_node->dev,
 599                     I40IW_DEBUG_CM,
 600                     "%s cm_node=%p state =%d\n",
 601                     __func__,
 602                     cm_node,
 603                     cm_node->state);
 604         if (reset)
 605                 i40iw_send_reset(cm_node);
 606         else
 607                 i40iw_rem_ref_cm_node(cm_node);
 608 }
 609
 610 /**
 611  * i40iw_event_connect_error - to create connect error event
 612  * @event: cm information for connect event
 613  */
 614 static void i40iw_event_connect_error(struct i40iw_cm_event *event)
 615 {
 616         struct i40iw_qp *iwqp;
 617         struct iw_cm_id *cm_id;
 618
 619         cm_id = event->cm_node->cm_id;
 620         if (!cm_id)
 621                 return;
 622
 623         iwqp = cm_id->provider_data;
 624
 625         if (!iwqp || !iwqp->iwdev)
 626                 return;
 627
 628         iwqp->cm_id = NULL;
 629         cm_id->provider_data = NULL;
 630         i40iw_send_cm_event(event->cm_node, cm_id,
 631                             IW_CM_EVENT_CONNECT_REPLY,
 632                             -ECONNRESET);
 633         cm_id->rem_ref(cm_id);
 634         i40iw_rem_ref_cm_node(event->cm_node);
 635 }
 636
 637 /**
 638  * i40iw_process_options
 639  * @cm_node: connection's node
 640  * @optionsloc: point to start of options
 641  * @optionsize: size of all options
 642  * @syn_packet: flag if syn packet
 643  */
 644 static int i40iw_process_options(struct i40iw_cm_node *cm_node,
 645                                  u8 *optionsloc,
 646                                  u32 optionsize,
 647                                  u32 syn_packet)
 648 {
 649         u32 tmp;
 650         u32 offset = 0;
 651         union all_known_options *all_options;
 652         char got_mss_option = 0;
 653
 654         while (offset < optionsize) {
 655                 all_options = (union all_known_options *)(optionsloc + offset);
 656                 switch (all_options->as_base.optionnum) {
 657                 case OPTION_NUMBER_END:
 658                         offset = optionsize;
 659                         break;
 660                 case OPTION_NUMBER_NONE:
 661                         offset += 1;
 662                         continue;
 663                 case OPTION_NUMBER_MSS:
 664                         i40iw_debug(cm_node->dev,
 665                                     I40IW_DEBUG_CM,
 666                                     "%s: MSS Length: %d Offset: %d Size: %d\n",
 667                                     __func__,
 668                                     all_options->as_mss.length,
 669                                     offset,
 670                                     optionsize);
 671                         got_mss_option = 1;
 672                         if (all_options->as_mss.length != 4)
 673                                 return -1;
 674                         tmp = ntohs(all_options->as_mss.mss);
 675                         if (tmp > 0 && tmp < cm_node->tcp_cntxt.mss)
 676                                 cm_node->tcp_cntxt.mss = tmp;
 677                         break;
 678                 case OPTION_NUMBER_WINDOW_SCALE:
 679                         cm_node->tcp_cntxt.snd_wscale =
 680                             all_options->as_windowscale.shiftcount;
 681                         break;
 682                 default:
 683                         i40iw_debug(cm_node->dev,
 684                                     I40IW_DEBUG_CM,
 685                                     "TCP Option not understood: %x\n",
 686                                     all_options->as_base.optionnum);
 687                         break;
 688                 }
 689                 offset += all_options->as_base.length;
 690         }
 691         if (!got_mss_option && syn_packet)
 692                 cm_node->tcp_cntxt.mss = I40IW_CM_DEFAULT_MSS;
 693         return 0;
 694 }
 695
 696 /**
 697  * i40iw_handle_tcp_options -
 698  * @cm_node: connection's node
 699  * @tcph: pointer tcp header
 700  * @optionsize: size of options rcvd
 701  * @passive: active or passive flag
 702  */
 703 static int i40iw_handle_tcp_options(struct i40iw_cm_node *cm_node,
 704                                     struct tcphdr *tcph,
 705                                     int optionsize,
 706                                     int passive)
 707 {
 708         u8 *optionsloc = (u8 *)&tcph[1];
 709
 710         if (optionsize) {
 711                 if (i40iw_process_options(cm_node,
 712                                           optionsloc,
 713                                           optionsize,
 714                                           (u32)tcph->syn)) {
 715                         i40iw_debug(cm_node->dev,
 716                                     I40IW_DEBUG_CM,
 717                                     "%s: Node %p, Sending RESET\n",
 718                                     __func__,
 719                                     cm_node);
 720                         if (passive)
 721                                 i40iw_passive_open_err(cm_node, true);
 722                         else
 723                                 i40iw_active_open_err(cm_node, true);
 724                         return -1;
 725                 }
 726         }
 727
 728         cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
 729             cm_node->tcp_cntxt.snd_wscale;
 730
 731         if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
 732                 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
 733         return 0;
 734 }
 735
 736 /**
 737  * i40iw_build_mpa_v1 - build a MPA V1 frame
 738  * @cm_node: connection's node
 739  * @mpa_key: to do read0 or write0
 740  */
 741 static void i40iw_build_mpa_v1(struct i40iw_cm_node *cm_node,
 742                                void *start_addr,
 743                                u8 mpa_key)
 744 {
 745         struct ietf_mpa_v1 *mpa_frame = (struct ietf_mpa_v1 *)start_addr;
 746
 747         switch (mpa_key) {
 748         case MPA_KEY_REQUEST:
 749                 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
 750                 break;
 751         case MPA_KEY_REPLY:
 752                 memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
 753                 break;
 754         default:
 755                 break;
 756         }
 757         mpa_frame->flags = IETF_MPA_FLAGS_CRC;
 758         mpa_frame->rev = cm_node->mpa_frame_rev;
 759         mpa_frame->priv_data_len = htons(cm_node->pdata.size);
 760 }
 761
 762 /**
 763  * i40iw_build_mpa_v2 - build a MPA V2 frame
 764  * @cm_node: connection's node
 765  * @start_addr: buffer start address
 766  * @mpa_key: to do read0 or write0
 767  */
 768 static void i40iw_build_mpa_v2(struct i40iw_cm_node *cm_node,
 769                                void *start_addr,
 770                                u8 mpa_key)
 771 {
 772         struct ietf_mpa_v2 *mpa_frame = (struct ietf_mpa_v2 *)start_addr;
 773         struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg;
 774
 775         /* initialize the upper 5 bytes of the frame */
 776         i40iw_build_mpa_v1(cm_node, start_addr, mpa_key);
 777         mpa_frame->flags |= IETF_MPA_V2_FLAG;
 778         mpa_frame->priv_data_len += htons(IETF_RTR_MSG_SIZE);
 779
 780         /* initialize RTR msg */
 781         if (cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) {
 782                 rtr_msg->ctrl_ird = IETF_NO_IRD_ORD;
 783                 rtr_msg->ctrl_ord = IETF_NO_IRD_ORD;
 784         } else {
 785                 rtr_msg->ctrl_ird = (cm_node->ird_size > IETF_NO_IRD_ORD) ?
 786                         IETF_NO_IRD_ORD : cm_node->ird_size;
 787                 rtr_msg->ctrl_ord = (cm_node->ord_size > IETF_NO_IRD_ORD) ?
 788                         IETF_NO_IRD_ORD : cm_node->ord_size;
 789         }
 790
 791         rtr_msg->ctrl_ird |= IETF_PEER_TO_PEER;
 792         rtr_msg->ctrl_ird |= IETF_FLPDU_ZERO_LEN;
 793
 794         switch (mpa_key) {
 795         case MPA_KEY_REQUEST:
 796                 rtr_msg->ctrl_ord |= IETF_RDMA0_WRITE;
 797                 rtr_msg->ctrl_ord |= IETF_RDMA0_READ;
 798                 break;
 799         case MPA_KEY_REPLY:
 800                 switch (cm_node->send_rdma0_op) {
 801                 case SEND_RDMA_WRITE_ZERO:
 802                         rtr_msg->ctrl_ord |= IETF_RDMA0_WRITE;
 803                         break;
 804                 case SEND_RDMA_READ_ZERO:
 805                         rtr_msg->ctrl_ord |= IETF_RDMA0_READ;
 806                         break;
 807                 }
 808                 break;
 809         default:
 810                 break;
 811         }
 812         rtr_msg->ctrl_ird = htons(rtr_msg->ctrl_ird);
 813         rtr_msg->ctrl_ord = htons(rtr_msg->ctrl_ord);
 814 }
 815
 816 /**
 817  * i40iw_cm_build_mpa_frame - build mpa frame for mpa version 1 or version 2
 818  * @cm_node: connection's node
 819  * @mpa: mpa: data buffer
 820  * @mpa_key: to do read0 or write0
 821  */
 822 static int i40iw_cm_build_mpa_frame(struct i40iw_cm_node *cm_node,
 823                                     struct i40iw_kmem_info *mpa,
 824                                     u8 mpa_key)
 825 {
 826         int hdr_len = 0;
 827
 828         switch (cm_node->mpa_frame_rev) {
 829         case IETF_MPA_V1:
 830                 hdr_len = sizeof(struct ietf_mpa_v1);
 831                 i40iw_build_mpa_v1(cm_node, mpa->addr, mpa_key);
 832                 break;
 833         case IETF_MPA_V2:
 834                 hdr_len = sizeof(struct ietf_mpa_v2);
 835                 i40iw_build_mpa_v2(cm_node, mpa->addr, mpa_key);
 836                 break;
 837         default:
 838                 break;
 839         }
 840
 841         return hdr_len;
 842 }
 843
 844 /**
 845  * i40iw_send_mpa_request - active node send mpa request to passive node
 846  * @cm_node: connection's node
 847  */
 848 static int i40iw_send_mpa_request(struct i40iw_cm_node *cm_node)
 849 {
 850         struct i40iw_puda_buf *sqbuf;
 851
 852         if (!cm_node) {
 853                 i40iw_pr_err("cm_node == NULL\n");
 854                 return -1;
 855         }
 856
 857         cm_node->mpa_hdr.addr = &cm_node->mpa_frame;
 858         cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node,
 859                                                          &cm_node->mpa_hdr,
 860                                                          MPA_KEY_REQUEST);
 861         if (!cm_node->mpa_hdr.size) {
 862                 i40iw_pr_err("mpa size = %d\n", cm_node->mpa_hdr.size);
 863                 return -1;
 864         }
 865
 866         sqbuf = i40iw_form_cm_frame(cm_node,
 867                                     NULL,
 868                                     &cm_node->mpa_hdr,
 869                                     &cm_node->pdata,
 870                                     SET_ACK);
 871         if (!sqbuf) {
 872                 i40iw_pr_err("sq_buf == NULL\n");
 873                 return -1;
 874         }
 875         return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
 876 }
 877
 878 /**
 879  * i40iw_send_mpa_reject -
 880  * @cm_node: connection's node
 881  * @pdata: reject data for connection
 882  * @plen: length of reject data
 883  */
 884 static int i40iw_send_mpa_reject(struct i40iw_cm_node *cm_node,
 885                                  const void *pdata,
 886                                  u8 plen)
 887 {
 888         struct i40iw_puda_buf *sqbuf;
 889         struct i40iw_kmem_info priv_info;
 890
 891         cm_node->mpa_hdr.addr = &cm_node->mpa_frame;
 892         cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node,
 893                                                          &cm_node->mpa_hdr,
 894                                                          MPA_KEY_REPLY);
 895
 896         cm_node->mpa_frame.flags |= IETF_MPA_FLAGS_REJECT;
 897         priv_info.addr = (void *)pdata;
 898         priv_info.size = plen;
 899
 900         sqbuf = i40iw_form_cm_frame(cm_node,
 901                                     NULL,
 902                                     &cm_node->mpa_hdr,
 903                                     &priv_info,
 904                                     SET_ACK | SET_FIN);
 905         if (!sqbuf) {
 906                 i40iw_pr_err("no sqbuf\n");
 907                 return -ENOMEM;
 908         }
 909         cm_node->state = I40IW_CM_STATE_FIN_WAIT1;
 910         return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
 911 }
 912
 913 /**
 914  * recv_mpa - process an IETF MPA frame
 915  * @cm_node: connection's node
 916  * @buffer: Data pointer
 917  * @type: to return accept or reject
 918  * @len: Len of mpa buffer
 919  */
 920 static int i40iw_parse_mpa(struct i40iw_cm_node *cm_node, u8 *buffer, u32 *type, u32 len)
 921 {
 922         struct ietf_mpa_v1 *mpa_frame;
 923         struct ietf_mpa_v2 *mpa_v2_frame;
 924         struct ietf_rtr_msg *rtr_msg;
 925         int mpa_hdr_len;
 926         int priv_data_len;
 927
 928         *type = I40IW_MPA_REQUEST_ACCEPT;
 929
 930         if (len < sizeof(struct ietf_mpa_v1)) {
 931                 i40iw_pr_err("ietf buffer small (%x)\n", len);
 932                 return -1;
 933         }
 934
 935         mpa_frame = (struct ietf_mpa_v1 *)buffer;
 936         mpa_hdr_len = sizeof(struct ietf_mpa_v1);
 937         priv_data_len = ntohs(mpa_frame->priv_data_len);
 938
 939         if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) {
 940                 i40iw_pr_err("large pri_data %d\n", priv_data_len);
 941                 return -1;
 942         }
 943         if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) {
 944                 i40iw_pr_err("unsupported mpa rev = %d\n", mpa_frame->rev);
 945                 return -1;
 946         }
 947         if (mpa_frame->rev > cm_node->mpa_frame_rev) {
 948                 i40iw_pr_err("rev %d\n", mpa_frame->rev);
 949                 return -1;
 950         }
 951         cm_node->mpa_frame_rev = mpa_frame->rev;
 952
 953         if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) {
 954                 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) {
 955                         i40iw_pr_err("Unexpected MPA Key received\n");
 956                         return -1;
 957                 }
 958         } else {
 959                 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) {
 960                         i40iw_pr_err("Unexpected MPA Key received\n");
 961                         return -1;
 962                 }
 963         }
 964
 965         if (priv_data_len + mpa_hdr_len > len) {
 966                 i40iw_pr_err("ietf buffer len(%x + %x != %x)\n",
 967                              priv_data_len, mpa_hdr_len, len);
 968                 return -1;
 969         }
 970         if (len > MAX_CM_BUFFER) {
 971                 i40iw_pr_err("ietf buffer large len = %d\n", len);
 972                 return -1;
 973         }
 974
 975         switch (mpa_frame->rev) {
 976         case IETF_MPA_V2:{
 977                         u16 ird_size;
 978                         u16 ord_size;
 979                         u16 ctrl_ord;
 980                         u16 ctrl_ird;
 981
 982                         mpa_v2_frame = (struct ietf_mpa_v2 *)buffer;
 983                         mpa_hdr_len += IETF_RTR_MSG_SIZE;
 984                         rtr_msg = &mpa_v2_frame->rtr_msg;
 985
 986                         /* parse rtr message */
 987                         ctrl_ord = ntohs(rtr_msg->ctrl_ord);
 988                         ctrl_ird = ntohs(rtr_msg->ctrl_ird);
 989                         ird_size = ctrl_ird & IETF_NO_IRD_ORD;
 990                         ord_size = ctrl_ord & IETF_NO_IRD_ORD;
 991
 992                         if (!(ctrl_ird & IETF_PEER_TO_PEER))
 993                                 return -1;
 994
 995                         if (ird_size == IETF_NO_IRD_ORD || ord_size == IETF_NO_IRD_ORD) {
 996                                 cm_node->mpav2_ird_ord = IETF_NO_IRD_ORD;
 997                                 goto negotiate_done;
 998                         }
 999
1000                         if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) {
1001                                 /* responder */
1002                                 if (!ord_size && (ctrl_ord & IETF_RDMA0_READ))
1003                                         cm_node->ird_size = 1;
1004                                 if (cm_node->ord_size > ird_size)
1005                                         cm_node->ord_size = ird_size;
1006                         } else {
1007                                 /* initiator */
1008                                 if (!ird_size && (ctrl_ord & IETF_RDMA0_READ))
1009                                         return -1;
1010                                 if (cm_node->ord_size > ird_size)
1011                                         cm_node->ord_size = ird_size;
1012
1013                                 if (cm_node->ird_size < ord_size)
1014                                         /* no resources available */
1015                                         return -1;
1016                         }
1017
1018 negotiate_done:
1019                         if (ctrl_ord & IETF_RDMA0_READ)
1020                                 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
1021                         else if (ctrl_ord & IETF_RDMA0_WRITE)
1022                                 cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO;
1023                         else    /* Not supported RDMA0 operation */
1024                                 return -1;
1025                         i40iw_debug(cm_node->dev, I40IW_DEBUG_CM,
1026                                     "MPAV2: Negotiated ORD: %d, IRD: %d\n",
1027                                     cm_node->ord_size, cm_node->ird_size);
1028                         break;
1029                 }
1030                 break;
1031         case IETF_MPA_V1:
1032         default:
1033                 break;
1034         }
1035
1036         memcpy(cm_node->pdata_buf, buffer + mpa_hdr_len, priv_data_len);
1037         cm_node->pdata.size = priv_data_len;
1038
1039         if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT)
1040                 *type = I40IW_MPA_REQUEST_REJECT;
1041
1042         if (mpa_frame->flags & IETF_MPA_FLAGS_MARKERS)
1043                 cm_node->snd_mark_en = true;
1044
1045         return 0;
1046 }
1047
1048 /**
1049  * i40iw_schedule_cm_timer
1050  * @@cm_node: connection's node
1051  * @sqbuf: buffer to send
1052  * @type: if it es send ot close
1053  * @send_retrans: if rexmits to be done
1054  * @close_when_complete: is cm_node to be removed
1055  *
1056  * note - cm_node needs to be protected before calling this. Encase in:
1057  *              i40iw_rem_ref_cm_node(cm_core, cm_node);
1058  *              i40iw_schedule_cm_timer(...)
1059  *              atomic_inc(&cm_node->ref_count);
1060  */
1061 int i40iw_schedule_cm_timer(struct i40iw_cm_node *cm_node,
1062                             struct i40iw_puda_buf *sqbuf,
1063                             enum i40iw_timer_type type,
1064                             int send_retrans,
1065                             int close_when_complete)
1066 {
1067         struct i40iw_sc_dev *dev = cm_node->dev;
1068         struct i40iw_cm_core *cm_core = cm_node->cm_core;
1069         struct i40iw_timer_entry *new_send;
1070         int ret = 0;
1071         u32 was_timer_set;
1072         unsigned long flags;
1073
1074         new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
1075         if (!new_send) {
1076                 i40iw_free_sqbuf(cm_node->dev, (void *)sqbuf);
1077                 return -ENOMEM;
1078         }
1079         new_send->retrycount = I40IW_DEFAULT_RETRYS;
1080         new_send->retranscount = I40IW_DEFAULT_RETRANS;
1081         new_send->sqbuf = sqbuf;
1082         new_send->timetosend = jiffies;
1083         new_send->type = type;
1084         new_send->send_retrans = send_retrans;
1085         new_send->close_when_complete = close_when_complete;
1086
1087         if (type == I40IW_TIMER_TYPE_CLOSE) {
1088                 new_send->timetosend += (HZ / 10);
1089                 if (cm_node->close_entry) {
1090                         kfree(new_send);
1091                         i40iw_free_sqbuf(cm_node->dev, (void *)sqbuf);
1092                         i40iw_pr_err("already close entry\n");
1093                         return -EINVAL;
1094                 }
1095                 cm_node->close_entry = new_send;
1096         }
1097
1098         if (type == I40IW_TIMER_TYPE_SEND) {
1099                 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1100                 cm_node->send_entry = new_send;
1101                 atomic_inc(&cm_node->ref_count);
1102                 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1103                 new_send->timetosend = jiffies + I40IW_RETRY_TIMEOUT;
1104
1105                 atomic_inc(&sqbuf->refcount);
1106                 i40iw_puda_send_buf(dev->ilq, sqbuf);
1107                 if (!send_retrans) {
1108                         i40iw_cleanup_retrans_entry(cm_node);
1109                         if (close_when_complete)
1110                                 i40iw_rem_ref_cm_node(cm_node);
1111                         return ret;
1112                 }
1113         }
1114
1115         spin_lock_irqsave(&cm_core->ht_lock, flags);
1116         was_timer_set = timer_pending(&cm_core->tcp_timer);
1117
1118         if (!was_timer_set) {
1119                 cm_core->tcp_timer.expires = new_send->timetosend;
1120                 add_timer(&cm_core->tcp_timer);
1121         }
1122         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1123
1124         return ret;
1125 }
1126
1127 /**
1128  * i40iw_retrans_expired - Could not rexmit the packet
1129  * @cm_node: connection's node
1130  */
1131 static void i40iw_retrans_expired(struct i40iw_cm_node *cm_node)
1132 {
1133         struct iw_cm_id *cm_id = cm_node->cm_id;
1134         enum i40iw_cm_node_state state = cm_node->state;
1135
1136         cm_node->state = I40IW_CM_STATE_CLOSED;
1137         switch (state) {
1138         case I40IW_CM_STATE_SYN_RCVD:
1139         case I40IW_CM_STATE_CLOSING:
1140                 i40iw_rem_ref_cm_node(cm_node);
1141                 break;
1142         case I40IW_CM_STATE_FIN_WAIT1:
1143         case I40IW_CM_STATE_LAST_ACK:
1144                 if (cm_node->cm_id)
1145                         cm_id->rem_ref(cm_id);
1146                 i40iw_send_reset(cm_node);
1147                 break;
1148         default:
1149                 atomic_inc(&cm_node->ref_count);
1150                 i40iw_send_reset(cm_node);
1151                 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
1152                 break;
1153         }
1154 }
1155
1156 /**
1157  * i40iw_handle_close_entry - for handling retry/timeouts
1158  * @cm_node: connection's node
1159  * @rem_node: flag for remove cm_node
1160  */
1161 static void i40iw_handle_close_entry(struct i40iw_cm_node *cm_node, u32 rem_node)
1162 {
1163         struct i40iw_timer_entry *close_entry = cm_node->close_entry;
1164         struct iw_cm_id *cm_id = cm_node->cm_id;
1165         struct i40iw_qp *iwqp;
1166         unsigned long flags;
1167
1168         if (!close_entry)
1169                 return;
1170         iwqp = (struct i40iw_qp *)close_entry->sqbuf;
1171         if (iwqp) {
1172                 spin_lock_irqsave(&iwqp->lock, flags);
1173                 if (iwqp->cm_id) {
1174                         iwqp->hw_tcp_state = I40IW_TCP_STATE_CLOSED;
1175                         iwqp->hw_iwarp_state = I40IW_QP_STATE_ERROR;
1176                         iwqp->last_aeq = I40IW_AE_RESET_SENT;
1177                         iwqp->ibqp_state = IB_QPS_ERR;
1178                         spin_unlock_irqrestore(&iwqp->lock, flags);
1179                         i40iw_cm_disconn(iwqp);
1180                 } else {
1181                         spin_unlock_irqrestore(&iwqp->lock, flags);
1182                 }
1183         } else if (rem_node) {
1184                 /* TIME_WAIT state */
1185                 i40iw_rem_ref_cm_node(cm_node);
1186         }
1187         if (cm_id)
1188                 cm_id->rem_ref(cm_id);
1189         kfree(close_entry);
1190         cm_node->close_entry = NULL;
1191 }
1192
1193 /**
1194  * i40iw_cm_timer_tick - system's timer expired callback
1195  * @pass: Pointing to cm_core
1196  */
1197 static void i40iw_cm_timer_tick(unsigned long pass)
1198 {
1199         unsigned long nexttimeout = jiffies + I40IW_LONG_TIME;
1200         struct i40iw_cm_node *cm_node;
1201         struct i40iw_timer_entry *send_entry, *close_entry;
1202         struct list_head *list_core_temp;
1203         struct list_head *list_node;
1204         struct i40iw_cm_core *cm_core = (struct i40iw_cm_core *)pass;
1205         u32 settimer = 0;
1206         unsigned long timetosend;
1207         struct i40iw_sc_dev *dev;
1208         unsigned long flags;
1209
1210         struct list_head timer_list;
1211
1212         INIT_LIST_HEAD(&timer_list);
1213         spin_lock_irqsave(&cm_core->ht_lock, flags);
1214
1215         list_for_each_safe(list_node, list_core_temp, &cm_core->connected_nodes) {
1216                 cm_node = container_of(list_node, struct i40iw_cm_node, list);
1217                 if (cm_node->close_entry || cm_node->send_entry) {
1218                         atomic_inc(&cm_node->ref_count);
1219                         list_add(&cm_node->timer_entry, &timer_list);
1220                 }
1221         }
1222         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1223
1224         list_for_each_safe(list_node, list_core_temp, &timer_list) {
1225                 cm_node = container_of(list_node,
1226                                        struct i40iw_cm_node,
1227                                        timer_entry);
1228                 close_entry = cm_node->close_entry;
1229
1230                 if (close_entry) {
1231                         if (time_after(close_entry->timetosend, jiffies)) {
1232                                 if (nexttimeout > close_entry->timetosend ||
1233                                     !settimer) {
1234                                         nexttimeout = close_entry->timetosend;
1235                                         settimer = 1;
1236                                 }
1237                         } else {
1238                                 i40iw_handle_close_entry(cm_node, 1);
1239                         }
1240                 }
1241
1242                 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1243
1244                 send_entry = cm_node->send_entry;
1245                 if (!send_entry)
1246                         goto done;
1247                 if (time_after(send_entry->timetosend, jiffies)) {
1248                         if (cm_node->state != I40IW_CM_STATE_OFFLOADED) {
1249                                 if ((nexttimeout > send_entry->timetosend) ||
1250                                     !settimer) {
1251                                         nexttimeout = send_entry->timetosend;
1252                                         settimer = 1;
1253                                 }
1254                         } else {
1255                                 i40iw_free_retrans_entry(cm_node);
1256                         }
1257                         goto done;
1258                 }
1259
1260                 if ((cm_node->state == I40IW_CM_STATE_OFFLOADED) ||
1261                     (cm_node->state == I40IW_CM_STATE_CLOSED)) {
1262                         i40iw_free_retrans_entry(cm_node);
1263                         goto done;
1264                 }
1265
1266                 if (!send_entry->retranscount || !send_entry->retrycount) {
1267                         i40iw_free_retrans_entry(cm_node);
1268
1269                         spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1270                         i40iw_retrans_expired(cm_node);
1271                         cm_node->state = I40IW_CM_STATE_CLOSED;
1272                         spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1273                         goto done;
1274                 }
1275                 cm_node->cm_core->stats_pkt_retrans++;
1276                 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1277
1278                 dev = cm_node->dev;
1279                 atomic_inc(&send_entry->sqbuf->refcount);
1280                 i40iw_puda_send_buf(dev->ilq, send_entry->sqbuf);
1281                 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1282                 if (send_entry->send_retrans) {
1283                         send_entry->retranscount--;
1284                         timetosend = (I40IW_RETRY_TIMEOUT <<
1285                                       (I40IW_DEFAULT_RETRANS -
1286                                        send_entry->retranscount));
1287
1288                         send_entry->timetosend = jiffies +
1289                             min(timetosend, I40IW_MAX_TIMEOUT);
1290                         if (nexttimeout > send_entry->timetosend || !settimer) {
1291                                 nexttimeout = send_entry->timetosend;
1292                                 settimer = 1;
1293                         }
1294                 } else {
1295                         int close_when_complete;
1296
1297                         close_when_complete = send_entry->close_when_complete;
1298                         i40iw_debug(cm_node->dev,
1299                                     I40IW_DEBUG_CM,
1300                                     "cm_node=%p state=%d\n",
1301                                     cm_node,
1302                                     cm_node->state);
1303                         i40iw_free_retrans_entry(cm_node);
1304                         if (close_when_complete)
1305                                 i40iw_rem_ref_cm_node(cm_node);
1306                 }
1307 done:
1308                 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1309                 i40iw_rem_ref_cm_node(cm_node);
1310         }
1311
1312         if (settimer) {
1313                 spin_lock_irqsave(&cm_core->ht_lock, flags);
1314                 if (!timer_pending(&cm_core->tcp_timer)) {
1315                         cm_core->tcp_timer.expires = nexttimeout;
1316                         add_timer(&cm_core->tcp_timer);
1317                 }
1318                 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1319         }
1320 }
1321
1322 /**
1323  * i40iw_send_syn - send SYN packet
1324  * @cm_node: connection's node
1325  * @sendack: flag to set ACK bit or not
1326  */
1327 int i40iw_send_syn(struct i40iw_cm_node *cm_node, u32 sendack)
1328 {
1329         struct i40iw_puda_buf *sqbuf;
1330         int flags = SET_SYN;
1331         char optionsbuffer[sizeof(struct option_mss) +
1332                            sizeof(struct option_windowscale) +
1333                            sizeof(struct option_base) + TCP_OPTIONS_PADDING];
1334         struct i40iw_kmem_info opts;
1335
1336         int optionssize = 0;
1337         /* Sending MSS option */
1338         union all_known_options *options;
1339
1340         opts.addr = optionsbuffer;
1341         if (!cm_node) {
1342                 i40iw_pr_err("no cm_node\n");
1343                 return -EINVAL;
1344         }
1345
1346         options = (union all_known_options *)&optionsbuffer[optionssize];
1347         options->as_mss.optionnum = OPTION_NUMBER_MSS;
1348         options->as_mss.length = sizeof(struct option_mss);
1349         options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
1350         optionssize += sizeof(struct option_mss);
1351
1352         options = (union all_known_options *)&optionsbuffer[optionssize];
1353         options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
1354         options->as_windowscale.length = sizeof(struct option_windowscale);
1355         options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
1356         optionssize += sizeof(struct option_windowscale);
1357         options = (union all_known_options *)&optionsbuffer[optionssize];
1358         options->as_end = OPTION_NUMBER_END;
1359         optionssize += 1;
1360
1361         if (sendack)
1362                 flags |= SET_ACK;
1363
1364         opts.size = optionssize;
1365
1366         sqbuf = i40iw_form_cm_frame(cm_node, &opts, NULL, NULL, flags);
1367         if (!sqbuf) {
1368                 i40iw_pr_err("no sqbuf\n");
1369                 return -1;
1370         }
1371         return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
1372 }
1373
1374 /**
1375  * i40iw_send_ack - Send ACK packet
1376  * @cm_node: connection's node
1377  */
1378 static void i40iw_send_ack(struct i40iw_cm_node *cm_node)
1379 {
1380         struct i40iw_puda_buf *sqbuf;
1381
1382         sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK);
1383         if (sqbuf)
1384                 i40iw_puda_send_buf(cm_node->dev->ilq, sqbuf);
1385         else
1386                 i40iw_pr_err("no sqbuf\n");
1387 }
1388
1389 /**
1390  * i40iw_send_fin - Send FIN pkt
1391  * @cm_node: connection's node
1392  */
1393 static int i40iw_send_fin(struct i40iw_cm_node *cm_node)
1394 {
1395         struct i40iw_puda_buf *sqbuf;
1396
1397         sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK | SET_FIN);
1398         if (!sqbuf) {
1399                 i40iw_pr_err("no sqbuf\n");
1400                 return -1;
1401         }
1402         return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
1403 }
1404
1405 /**
1406  * i40iw_find_node - find a cm node that matches the reference cm node
1407  * @cm_core: cm's core
1408  * @rem_port: remote tcp port num
1409  * @rem_addr: remote ip addr
1410  * @loc_port: local tcp port num
1411  * @loc_addr: loc ip addr
1412  * @add_refcnt: flag to increment refcount of cm_node
1413  */
1414 struct i40iw_cm_node *i40iw_find_node(struct i40iw_cm_core *cm_core,
1415                                       u16 rem_port,
1416                                       u32 *rem_addr,
1417                                       u16 loc_port,
1418                                       u32 *loc_addr,
1419                                       bool add_refcnt)
1420 {
1421         struct list_head *hte;
1422         struct i40iw_cm_node *cm_node;
1423         unsigned long flags;
1424
1425         hte = &cm_core->connected_nodes;
1426
1427         /* walk list and find cm_node associated with this session ID */
1428         spin_lock_irqsave(&cm_core->ht_lock, flags);
1429         list_for_each_entry(cm_node, hte, list) {
1430                 if (!memcmp(cm_node->loc_addr, loc_addr, sizeof(cm_node->loc_addr)) &&
1431                     (cm_node->loc_port == loc_port) &&
1432                     !memcmp(cm_node->rem_addr, rem_addr, sizeof(cm_node->rem_addr)) &&
1433                     (cm_node->rem_port == rem_port)) {
1434                         if (add_refcnt)
1435                                 atomic_inc(&cm_node->ref_count);
1436                         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1437                         return cm_node;
1438                 }
1439         }
1440         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1441
1442         /* no owner node */
1443         return NULL;
1444 }
1445
1446 /**
1447  * i40iw_find_listener - find a cm node listening on this addr-port pair
1448  * @cm_core: cm's core
1449  * @dst_port: listener tcp port num
1450  * @dst_addr: listener ip addr
1451  * @listener_state: state to match with listen node's
1452  */
1453 static struct i40iw_cm_listener *i40iw_find_listener(
1454                                                      struct i40iw_cm_core *cm_core,
1455                                                      u32 *dst_addr,
1456                                                      u16 dst_port,
1457                                                      u16 vlan_id,
1458                                                      enum i40iw_cm_listener_state
1459                                                      listener_state)
1460 {
1461         struct i40iw_cm_listener *listen_node;
1462         static const u32 ip_zero[4] = { 0, 0, 0, 0 };
1463         u32 listen_addr[4];
1464         u16 listen_port;
1465         unsigned long flags;
1466
1467         /* walk list and find cm_node associated with this session ID */
1468         spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1469         list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
1470                 memcpy(listen_addr, listen_node->loc_addr, sizeof(listen_addr));
1471                 listen_port = listen_node->loc_port;
1472                 /* compare node pair, return node handle if a match */
1473                 if ((!memcmp(listen_addr, dst_addr, sizeof(listen_addr)) ||
1474                      !memcmp(listen_addr, ip_zero, sizeof(listen_addr))) &&
1475                      (listen_port == dst_port) &&
1476                      (listener_state & listen_node->listener_state)) {
1477                         atomic_inc(&listen_node->ref_count);
1478                         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1479                         return listen_node;
1480                 }
1481         }
1482         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1483         return NULL;
1484 }
1485
1486 /**
1487  * i40iw_add_hte_node - add a cm node to the hash table
1488  * @cm_core: cm's core
1489  * @cm_node: connection's node
1490  */
1491 static void i40iw_add_hte_node(struct i40iw_cm_core *cm_core,
1492                                struct i40iw_cm_node *cm_node)
1493 {
1494         struct list_head *hte;
1495         unsigned long flags;
1496
1497         if (!cm_node || !cm_core) {
1498                 i40iw_pr_err("cm_node or cm_core == NULL\n");
1499                 return;
1500         }
1501         spin_lock_irqsave(&cm_core->ht_lock, flags);
1502
1503         /* get a handle on the hash table element (list head for this slot) */
1504         hte = &cm_core->connected_nodes;
1505         list_add_tail(&cm_node->list, hte);
1506         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1507 }
1508
1509 /**
1510  * listen_port_in_use - determine if port is in use
1511  * @port: Listen port number
1512  */
1513 static bool i40iw_listen_port_in_use(struct i40iw_cm_core *cm_core, u16 port)
1514 {
1515         struct i40iw_cm_listener *listen_node;
1516         unsigned long flags;
1517         bool ret = false;
1518
1519         spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1520         list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
1521                 if (listen_node->loc_port == port) {
1522                         ret = true;
1523                         break;
1524                 }
1525         }
1526         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1527         return ret;
1528 }
1529
1530 /**
1531  * i40iw_del_multiple_qhash - Remove qhash and child listens
1532  * @iwdev: iWarp device
1533  * @cm_info: CM info for parent listen node
1534  * @cm_parent_listen_node: The parent listen node
1535  */
1536 static enum i40iw_status_code i40iw_del_multiple_qhash(
1537                                                        struct i40iw_device *iwdev,
1538                                                        struct i40iw_cm_info *cm_info,
1539                                                        struct i40iw_cm_listener *cm_parent_listen_node)
1540 {
1541         struct i40iw_cm_listener *child_listen_node;
1542         enum i40iw_status_code ret = I40IW_ERR_CONFIG;
1543         struct list_head *pos, *tpos;
1544         unsigned long flags;
1545
1546         spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1547         list_for_each_safe(pos, tpos, &cm_parent_listen_node->child_listen_list) {
1548                 child_listen_node = list_entry(pos, struct i40iw_cm_listener, child_listen_list);
1549                 if (child_listen_node->ipv4)
1550                         i40iw_debug(&iwdev->sc_dev,
1551                                     I40IW_DEBUG_CM,
1552                                     "removing child listen for IP=%pI4, port=%d, vlan=%d\n",
1553                                     child_listen_node->loc_addr,
1554                                     child_listen_node->loc_port,
1555                                     child_listen_node->vlan_id);
1556                 else
1557                         i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM,
1558                                     "removing child listen for IP=%pI6, port=%d, vlan=%d\n",
1559                                     child_listen_node->loc_addr,
1560                                     child_listen_node->loc_port,
1561                                     child_listen_node->vlan_id);
1562                 list_del(pos);
1563                 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1564                        sizeof(cm_info->loc_addr));
1565                 cm_info->vlan_id = child_listen_node->vlan_id;
1566                 ret = i40iw_manage_qhash(iwdev, cm_info,
1567                                          I40IW_QHASH_TYPE_TCP_SYN,
1568                                          I40IW_QHASH_MANAGE_TYPE_DELETE, NULL, false);
1569                 kfree(child_listen_node);
1570                 cm_parent_listen_node->cm_core->stats_listen_nodes_destroyed++;
1571                 i40iw_debug(&iwdev->sc_dev,
1572                             I40IW_DEBUG_CM,
1573                             "freed pointer = %p\n",
1574                             child_listen_node);
1575         }
1576         spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1577
1578         return ret;
1579 }
1580
1581 /**
1582  * i40iw_netdev_vlan_ipv6 - Gets the netdev and mac
1583  * @addr: local IPv6 address
1584  * @vlan_id: vlan id for the given IPv6 address
1585  * @mac: mac address for the given IPv6 address
1586  *
1587  * Returns the net_device of the IPv6 address and also sets the
1588  * vlan id and mac for that address.
1589  */
1590 static struct net_device *i40iw_netdev_vlan_ipv6(u32 *addr, u16 *vlan_id, u8 *mac)
1591 {
1592         struct net_device *ip_dev = NULL;
1593 #if IS_ENABLED(CONFIG_IPV6)
1594         struct in6_addr laddr6;
1595
1596         i40iw_copy_ip_htonl(laddr6.in6_u.u6_addr32, addr);
1597         if (vlan_id)
1598                 *vlan_id = I40IW_NO_VLAN;
1599         if (mac)
1600                 eth_zero_addr(mac);
1601         rcu_read_lock();
1602         for_each_netdev_rcu(&init_net, ip_dev) {
1603                 if (ipv6_chk_addr(&init_net, &laddr6, ip_dev, 1)) {
1604                         if (vlan_id)
1605                                 *vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1606                         if (ip_dev->dev_addr && mac)
1607                                 ether_addr_copy(mac, ip_dev->dev_addr);
1608                         break;
1609                 }
1610         }
1611         rcu_read_unlock();
1612 #endif
1613         return ip_dev;
1614 }
1615
1616 /**
1617  * i40iw_get_vlan_ipv4 - Returns the vlan_id for IPv4 address
1618  * @addr: local IPv4 address
1619  */
1620 static u16 i40iw_get_vlan_ipv4(u32 *addr)
1621 {
1622         struct net_device *netdev;
1623         u16 vlan_id = I40IW_NO_VLAN;
1624
1625         netdev = ip_dev_find(&init_net, htonl(addr[0]));
1626         if (netdev) {
1627                 vlan_id = rdma_vlan_dev_vlan_id(netdev);
1628                 dev_put(netdev);
1629         }
1630         return vlan_id;
1631 }
1632
1633 /**
1634  * i40iw_add_mqh_6 - Adds multiple qhashes for IPv6
1635  * @iwdev: iWarp device
1636  * @cm_info: CM info for parent listen node
1637  * @cm_parent_listen_node: The parent listen node
1638  *
1639  * Adds a qhash and a child listen node for every IPv6 address
1640  * on the adapter and adds the associated qhash filter
1641  */
1642 static enum i40iw_status_code i40iw_add_mqh_6(struct i40iw_device *iwdev,
1643                                               struct i40iw_cm_info *cm_info,
1644                                               struct i40iw_cm_listener *cm_parent_listen_node)
1645 {
1646         struct net_device *ip_dev;
1647         struct inet6_dev *idev;
1648         struct inet6_ifaddr *ifp;
1649         enum i40iw_status_code ret = 0;
1650         struct i40iw_cm_listener *child_listen_node;
1651         unsigned long flags;
1652
1653         rtnl_lock();
1654         for_each_netdev_rcu(&init_net, ip_dev) {
1655                 if ((((rdma_vlan_dev_vlan_id(ip_dev) < I40IW_NO_VLAN) &&
1656                       (rdma_vlan_dev_real_dev(ip_dev) == iwdev->netdev)) ||
1657                      (ip_dev == iwdev->netdev)) && (ip_dev->flags & IFF_UP)) {
1658                         idev = __in6_dev_get(ip_dev);
1659                         if (!idev) {
1660                                 i40iw_pr_err("idev == NULL\n");
1661                                 break;
1662                         }
1663                         list_for_each_entry(ifp, &idev->addr_list, if_list) {
1664                                 i40iw_debug(&iwdev->sc_dev,
1665                                             I40IW_DEBUG_CM,
1666                                             "IP=%pI6, vlan_id=%d, MAC=%pM\n",
1667                                             &ifp->addr,
1668                                             rdma_vlan_dev_vlan_id(ip_dev),
1669                                             ip_dev->dev_addr);
1670                                 child_listen_node =
1671                                         kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
1672                                 i40iw_debug(&iwdev->sc_dev,
1673                                             I40IW_DEBUG_CM,
1674                                             "Allocating child listener %p\n",
1675                                             child_listen_node);
1676                                 if (!child_listen_node) {
1677                                         i40iw_pr_err("listener memory allocation\n");
1678                                         ret = I40IW_ERR_NO_MEMORY;
1679                                         goto exit;
1680                                 }
1681                                 cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
1682                                 cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1683
1684                                 memcpy(child_listen_node, cm_parent_listen_node,
1685                                        sizeof(*child_listen_node));
1686
1687                                 i40iw_copy_ip_ntohl(child_listen_node->loc_addr,
1688                                                     ifp->addr.in6_u.u6_addr32);
1689                                 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1690                                        sizeof(cm_info->loc_addr));
1691
1692                                 ret = i40iw_manage_qhash(iwdev, cm_info,
1693                                                          I40IW_QHASH_TYPE_TCP_SYN,
1694                                                          I40IW_QHASH_MANAGE_TYPE_ADD,
1695                                                          NULL, true);
1696                                 if (!ret) {
1697                                         spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1698                                         list_add(&child_listen_node->child_listen_list,
1699                                                  &cm_parent_listen_node->child_listen_list);
1700                                         spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1701                                         cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
1702                                 } else {
1703                                         kfree(child_listen_node);
1704                                 }
1705                         }
1706                 }
1707         }
1708 exit:
1709         rtnl_unlock();
1710         return ret;
1711 }
1712
1713 /**
1714  * i40iw_add_mqh_4 - Adds multiple qhashes for IPv4
1715  * @iwdev: iWarp device
1716  * @cm_info: CM info for parent listen node
1717  * @cm_parent_listen_node: The parent listen node
1718  *
1719  * Adds a qhash and a child listen node for every IPv4 address
1720  * on the adapter and adds the associated qhash filter
1721  */
1722 static enum i40iw_status_code i40iw_add_mqh_4(
1723                                 struct i40iw_device *iwdev,
1724                                 struct i40iw_cm_info *cm_info,
1725                                 struct i40iw_cm_listener *cm_parent_listen_node)
1726 {
1727         struct net_device *dev;
1728         struct in_device *idev;
1729         struct i40iw_cm_listener *child_listen_node;
1730         enum i40iw_status_code ret = 0;
1731         unsigned long flags;
1732
1733         rtnl_lock();
1734         for_each_netdev(&init_net, dev) {
1735                 if ((((rdma_vlan_dev_vlan_id(dev) < I40IW_NO_VLAN) &&
1736                       (rdma_vlan_dev_real_dev(dev) == iwdev->netdev)) ||
1737                     (dev == iwdev->netdev)) && (dev->flags & IFF_UP)) {
1738                         idev = in_dev_get(dev);
1739                         for_ifa(idev) {
1740                                 i40iw_debug(&iwdev->sc_dev,
1741                                             I40IW_DEBUG_CM,
1742                                             "Allocating child CM Listener forIP=%pI4, vlan_id=%d, MAC=%pM\n",
1743                                             &ifa->ifa_address,
1744                                             rdma_vlan_dev_vlan_id(dev),
1745                                             dev->dev_addr);
1746                                 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
1747                                 cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
1748                                 i40iw_debug(&iwdev->sc_dev,
1749                                             I40IW_DEBUG_CM,
1750                                             "Allocating child listener %p\n",
1751                                             child_listen_node);
1752                                 if (!child_listen_node) {
1753                                         i40iw_pr_err("listener memory allocation\n");
1754                                         in_dev_put(idev);
1755                                         ret = I40IW_ERR_NO_MEMORY;
1756                                         goto exit;
1757                                 }
1758                                 cm_info->vlan_id = rdma_vlan_dev_vlan_id(dev);
1759                                 cm_parent_listen_node->vlan_id = cm_info->vlan_id;
1760                                 memcpy(child_listen_node,
1761                                        cm_parent_listen_node,
1762                                        sizeof(*child_listen_node));
1763
1764                                 child_listen_node->loc_addr[0] = ntohl(ifa->ifa_address);
1765                                 memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
1766                                        sizeof(cm_info->loc_addr));
1767
1768                                 ret = i40iw_manage_qhash(iwdev,
1769                                                          cm_info,
1770                                                          I40IW_QHASH_TYPE_TCP_SYN,
1771                                                          I40IW_QHASH_MANAGE_TYPE_ADD,
1772                                                          NULL,
1773                                                          true);
1774                                 if (!ret) {
1775                                         spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
1776                                         list_add(&child_listen_node->child_listen_list,
1777                                                  &cm_parent_listen_node->child_listen_list);
1778                                         spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
1779                                 } else {
1780                                         kfree(child_listen_node);
1781                                         cm_parent_listen_node->cm_core->stats_listen_nodes_created--;
1782                                 }
1783                         }
1784                         endfor_ifa(idev);
1785                         in_dev_put(idev);
1786                 }
1787         }
1788 exit:
1789         rtnl_unlock();
1790         return ret;
1791 }
1792
1793 /**
1794  * i40iw_dec_refcnt_listen - delete listener and associated cm nodes
1795  * @cm_core: cm's core
1796  * @free_hanging_nodes: to free associated cm_nodes
1797  * @apbvt_del: flag to delete the apbvt
1798  */
1799 static int i40iw_dec_refcnt_listen(struct i40iw_cm_core *cm_core,
1800                                    struct i40iw_cm_listener *listener,
1801                                    int free_hanging_nodes, bool apbvt_del)
1802 {
1803         int ret = -EINVAL;
1804         int err = 0;
1805         struct list_head *list_pos;
1806         struct list_head *list_temp;
1807         struct i40iw_cm_node *cm_node;
1808         struct list_head reset_list;
1809         struct i40iw_cm_info nfo;
1810         struct i40iw_cm_node *loopback;
1811         enum i40iw_cm_node_state old_state;
1812         unsigned long flags;
1813
1814         /* free non-accelerated child nodes for this listener */
1815         INIT_LIST_HEAD(&reset_list);
1816         if (free_hanging_nodes) {
1817                 spin_lock_irqsave(&cm_core->ht_lock, flags);
1818                 list_for_each_safe(list_pos, list_temp, &cm_core->connected_nodes) {
1819                         cm_node = container_of(list_pos, struct i40iw_cm_node, list);
1820                         if ((cm_node->listener == listener) && !cm_node->accelerated) {
1821                                 atomic_inc(&cm_node->ref_count);
1822                                 list_add(&cm_node->reset_entry, &reset_list);
1823                         }
1824                 }
1825                 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1826         }
1827
1828         list_for_each_safe(list_pos, list_temp, &reset_list) {
1829                 cm_node = container_of(list_pos, struct i40iw_cm_node, reset_entry);
1830                 loopback = cm_node->loopbackpartner;
1831                 if (cm_node->state >= I40IW_CM_STATE_FIN_WAIT1) {
1832                         i40iw_rem_ref_cm_node(cm_node);
1833                 } else {
1834                         if (!loopback) {
1835                                 i40iw_cleanup_retrans_entry(cm_node);
1836                                 err = i40iw_send_reset(cm_node);
1837                                 if (err) {
1838                                         cm_node->state = I40IW_CM_STATE_CLOSED;
1839                                         i40iw_pr_err("send reset\n");
1840                                 } else {
1841                                         old_state = cm_node->state;
1842                                         cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED;
1843                                         if (old_state != I40IW_CM_STATE_MPAREQ_RCVD)
1844                                                 i40iw_rem_ref_cm_node(cm_node);
1845                                 }
1846                         } else {
1847                                 struct i40iw_cm_event event;
1848
1849                                 event.cm_node = loopback;
1850                                 memcpy(event.cm_info.rem_addr,
1851                                        loopback->rem_addr, sizeof(event.cm_info.rem_addr));
1852                                 memcpy(event.cm_info.loc_addr,
1853                                        loopback->loc_addr, sizeof(event.cm_info.loc_addr));
1854                                 event.cm_info.rem_port = loopback->rem_port;
1855                                 event.cm_info.loc_port = loopback->loc_port;
1856                                 event.cm_info.cm_id = loopback->cm_id;
1857                                 event.cm_info.ipv4 = loopback->ipv4;
1858                                 atomic_inc(&loopback->ref_count);
1859                                 loopback->state = I40IW_CM_STATE_CLOSED;
1860                                 i40iw_event_connect_error(&event);
1861                                 cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED;
1862                                 i40iw_rem_ref_cm_node(cm_node);
1863                         }
1864                 }
1865         }
1866
1867         if (!atomic_dec_return(&listener->ref_count)) {
1868                 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1869                 list_del(&listener->list);
1870                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1871
1872                 if (listener->iwdev) {
1873                         if (apbvt_del && !i40iw_listen_port_in_use(cm_core, listener->loc_port))
1874                                 i40iw_manage_apbvt(listener->iwdev,
1875                                                    listener->loc_port,
1876                                                    I40IW_MANAGE_APBVT_DEL);
1877
1878                         memcpy(nfo.loc_addr, listener->loc_addr, sizeof(nfo.loc_addr));
1879                         nfo.loc_port = listener->loc_port;
1880                         nfo.ipv4 = listener->ipv4;
1881                         nfo.vlan_id = listener->vlan_id;
1882
1883                         if (!list_empty(&listener->child_listen_list)) {
1884                                 i40iw_del_multiple_qhash(listener->iwdev, &nfo, listener);
1885                         } else {
1886                                 if (listener->qhash_set)
1887                                         i40iw_manage_qhash(listener->iwdev,
1888                                                            &nfo,
1889                                                            I40IW_QHASH_TYPE_TCP_SYN,
1890                                                            I40IW_QHASH_MANAGE_TYPE_DELETE,
1891                                                            NULL,
1892                                                            false);
1893                         }
1894                 }
1895
1896                 cm_core->stats_listen_destroyed++;
1897                 kfree(listener);
1898                 cm_core->stats_listen_nodes_destroyed++;
1899                 listener = NULL;
1900                 ret = 0;
1901         }
1902
1903         if (listener) {
1904                 if (atomic_read(&listener->pend_accepts_cnt) > 0)
1905                         i40iw_debug(cm_core->dev,
1906                                     I40IW_DEBUG_CM,
1907                                     "%s: listener (%p) pending accepts=%u\n",
1908                                     __func__,
1909                                     listener,
1910                                     atomic_read(&listener->pend_accepts_cnt));
1911         }
1912
1913         return ret;
1914 }
1915
1916 /**
1917  * i40iw_cm_del_listen - delete a linstener
1918  * @cm_core: cm's core
1919   * @listener: passive connection's listener
1920  * @apbvt_del: flag to delete apbvt
1921  */
1922 static int i40iw_cm_del_listen(struct i40iw_cm_core *cm_core,
1923                                struct i40iw_cm_listener *listener,
1924                                bool apbvt_del)
1925 {
1926         listener->listener_state = I40IW_CM_LISTENER_PASSIVE_STATE;
1927         listener->cm_id = NULL; /* going to be destroyed pretty soon */
1928         return i40iw_dec_refcnt_listen(cm_core, listener, 1, apbvt_del);
1929 }
1930
1931 /**
1932  * i40iw_addr_resolve_neigh - resolve neighbor address
1933  * @iwdev: iwarp device structure
1934  * @src_ip: local ip address
1935  * @dst_ip: remote ip address
1936  * @arpindex: if there is an arp entry
1937  */
1938 static int i40iw_addr_resolve_neigh(struct i40iw_device *iwdev,
1939                                     u32 src_ip,
1940                                     u32 dst_ip,
1941                                     int arpindex)
1942 {
1943         struct rtable *rt;
1944         struct neighbour *neigh;
1945         int rc = arpindex;
1946         struct net_device *netdev = iwdev->netdev;
1947         __be32 dst_ipaddr = htonl(dst_ip);
1948         __be32 src_ipaddr = htonl(src_ip);
1949
1950         rt = ip_route_output(&init_net, dst_ipaddr, src_ipaddr, 0, 0);
1951         if (IS_ERR(rt)) {
1952                 i40iw_pr_err("ip_route_output\n");
1953                 return rc;
1954         }
1955
1956         if (netif_is_bond_slave(netdev))
1957                 netdev = netdev_master_upper_dev_get(netdev);
1958
1959         neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr);
1960
1961         rcu_read_lock();
1962         if (neigh) {
1963                 if (neigh->nud_state & NUD_VALID) {
1964                         if (arpindex >= 0) {
1965                                 if (ether_addr_equal(iwdev->arp_table[arpindex].mac_addr,
1966                                                      neigh->ha))
1967                                         /* Mac address same as arp table */
1968                                         goto resolve_neigh_exit;
1969                                 i40iw_manage_arp_cache(iwdev,
1970                                                        iwdev->arp_table[arpindex].mac_addr,
1971                                                        &dst_ip,
1972                                                        true,
1973                                                        I40IW_ARP_DELETE);
1974                         }
1975
1976                         i40iw_manage_arp_cache(iwdev, neigh->ha, &dst_ip, true, I40IW_ARP_ADD);
1977                         rc = i40iw_arp_table(iwdev, &dst_ip, true, NULL, I40IW_ARP_RESOLVE);
1978                 } else {
1979                         neigh_event_send(neigh, NULL);
1980                 }
1981         }
1982  resolve_neigh_exit:
1983
1984         rcu_read_unlock();
1985         if (neigh)
1986                 neigh_release(neigh);
1987
1988         ip_rt_put(rt);
1989         return rc;
1990 }
1991
1992 /**
1993  * i40iw_get_dst_ipv6
1994  */
1995 #if IS_ENABLED(CONFIG_IPV6)
1996 static struct dst_entry *i40iw_get_dst_ipv6(struct sockaddr_in6 *src_addr,
1997                                             struct sockaddr_in6 *dst_addr)
1998 {
1999         struct dst_entry *dst;
2000         struct flowi6 fl6;
2001
2002         memset(&fl6, 0, sizeof(fl6));
2003         fl6.daddr = dst_addr->sin6_addr;
2004         fl6.saddr = src_addr->sin6_addr;
2005         if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
2006                 fl6.flowi6_oif = dst_addr->sin6_scope_id;
2007
2008         dst = ip6_route_output(&init_net, NULL, &fl6);
2009         return dst;
2010 }
2011 #endif
2012
2013 /**
2014  * i40iw_addr_resolve_neigh_ipv6 - resolve neighbor ipv6 address
2015  * @iwdev: iwarp device structure
2016  * @dst_ip: remote ip address
2017  * @arpindex: if there is an arp entry
2018  */
2019 #if IS_ENABLED(CONFIG_IPV6)
2020 static int i40iw_addr_resolve_neigh_ipv6(struct i40iw_device *iwdev,
2021                                          u32 *src,
2022                                          u32 *dest,
2023                                          int arpindex)
2024 {
2025         struct neighbour *neigh;
2026         int rc = arpindex;
2027         struct net_device *netdev = iwdev->netdev;
2028         struct dst_entry *dst;
2029         struct sockaddr_in6 dst_addr;
2030         struct sockaddr_in6 src_addr;
2031
2032         memset(&dst_addr, 0, sizeof(dst_addr));
2033         dst_addr.sin6_family = AF_INET6;
2034         i40iw_copy_ip_htonl(dst_addr.sin6_addr.in6_u.u6_addr32, dest);
2035         memset(&src_addr, 0, sizeof(src_addr));
2036         src_addr.sin6_family = AF_INET6;
2037         i40iw_copy_ip_htonl(src_addr.sin6_addr.in6_u.u6_addr32, src);
2038         dst = i40iw_get_dst_ipv6(&src_addr, &dst_addr);
2039         if (!dst || dst->error) {
2040                 if (dst) {
2041                         dst_release(dst);
2042                         i40iw_pr_err("ip6_route_output returned dst->error = %d\n",
2043                                      dst->error);
2044                 }
2045                 return rc;
2046         }
2047
2048         if (netif_is_bond_slave(netdev))
2049                 netdev = netdev_master_upper_dev_get(netdev);
2050
2051         neigh = dst_neigh_lookup(dst, &dst_addr);
2052
2053         rcu_read_lock();
2054         if (neigh) {
2055                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "dst_neigh_lookup MAC=%pM\n", neigh->ha);
2056                 if (neigh->nud_state & NUD_VALID) {
2057                         if (arpindex >= 0) {
2058                                 if (ether_addr_equal
2059                                     (iwdev->arp_table[arpindex].mac_addr,
2060                                      neigh->ha)) {
2061                                         /* Mac address same as in arp table */
2062                                         goto resolve_neigh_exit6;
2063                                 }
2064                                 i40iw_manage_arp_cache(iwdev,
2065                                                        iwdev->arp_table[arpindex].mac_addr,
2066                                                        dest,
2067                                                        false,
2068                                                        I40IW_ARP_DELETE);
2069                         }
2070                         i40iw_manage_arp_cache(iwdev,
2071                                                neigh->ha,
2072                                                dest,
2073                                                false,
2074                                                I40IW_ARP_ADD);
2075                         rc = i40iw_arp_table(iwdev,
2076                                              dest,
2077                                              false,
2078                                              NULL,
2079                                              I40IW_ARP_RESOLVE);
2080                 } else {
2081                         neigh_event_send(neigh, NULL);
2082                 }
2083         }
2084
2085  resolve_neigh_exit6:
2086         rcu_read_unlock();
2087         if (neigh)
2088                 neigh_release(neigh);
2089         dst_release(dst);
2090         return rc;
2091 }
2092 #endif
2093
2094 /**
2095  * i40iw_ipv4_is_loopback - check if loopback
2096  * @loc_addr: local addr to compare
2097  * @rem_addr: remote address
2098  */
2099 static bool i40iw_ipv4_is_loopback(u32 loc_addr, u32 rem_addr)
2100 {
2101         return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr);
2102 }
2103
2104 /**
2105  * i40iw_ipv6_is_loopback - check if loopback
2106  * @loc_addr: local addr to compare
2107  * @rem_addr: remote address
2108  */
2109 static bool i40iw_ipv6_is_loopback(u32 *loc_addr, u32 *rem_addr)
2110 {
2111         struct in6_addr raddr6;
2112
2113         i40iw_copy_ip_htonl(raddr6.in6_u.u6_addr32, rem_addr);
2114         return (!memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6));
2115 }
2116
2117 /**
2118  * i40iw_make_cm_node - create a new instance of a cm node
2119  * @cm_core: cm's core
2120  * @iwdev: iwarp device structure
2121  * @cm_info: quad info for connection
2122  * @listener: passive connection's listener
2123  */
2124 static struct i40iw_cm_node *i40iw_make_cm_node(
2125                                    struct i40iw_cm_core *cm_core,
2126                                    struct i40iw_device *iwdev,
2127                                    struct i40iw_cm_info *cm_info,
2128                                    struct i40iw_cm_listener *listener)
2129 {
2130         struct i40iw_cm_node *cm_node;
2131         struct timespec ts;
2132         int oldarpindex;
2133         int arpindex;
2134         struct net_device *netdev = iwdev->netdev;
2135
2136         /* create an hte and cm_node for this instance */
2137         cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
2138         if (!cm_node)
2139                 return NULL;
2140
2141         /* set our node specific transport info */
2142         cm_node->ipv4 = cm_info->ipv4;
2143         cm_node->vlan_id = cm_info->vlan_id;
2144         memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr));
2145         memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr));
2146         cm_node->loc_port = cm_info->loc_port;
2147         cm_node->rem_port = cm_info->rem_port;
2148
2149         cm_node->mpa_frame_rev = iwdev->mpa_version;
2150         cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
2151         cm_node->ird_size = I40IW_MAX_IRD_SIZE;
2152         cm_node->ord_size = I40IW_MAX_ORD_SIZE;
2153
2154         cm_node->listener = listener;
2155         cm_node->cm_id = cm_info->cm_id;
2156         ether_addr_copy(cm_node->loc_mac, netdev->dev_addr);
2157         spin_lock_init(&cm_node->retrans_list_lock);
2158
2159         atomic_set(&cm_node->ref_count, 1);
2160         /* associate our parent CM core */
2161         cm_node->cm_core = cm_core;
2162         cm_node->tcp_cntxt.loc_id = I40IW_CM_DEF_LOCAL_ID;
2163         cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE;
2164         cm_node->tcp_cntxt.rcv_wnd =
2165                         I40IW_CM_DEFAULT_RCV_WND_SCALED >> I40IW_CM_DEFAULT_RCV_WND_SCALE;
2166         ts = current_kernel_time();
2167         cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
2168         cm_node->tcp_cntxt.mss = iwdev->mss;
2169
2170         cm_node->iwdev = iwdev;
2171         cm_node->dev = &iwdev->sc_dev;
2172
2173         if ((cm_node->ipv4 &&
2174              i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
2175              (!cm_node->ipv4 && i40iw_ipv6_is_loopback(cm_node->loc_addr,
2176                                                        cm_node->rem_addr))) {
2177                 arpindex = i40iw_arp_table(iwdev,
2178                                            cm_node->rem_addr,
2179                                            false,
2180                                            NULL,
2181                                            I40IW_ARP_RESOLVE);
2182         } else {
2183                 oldarpindex = i40iw_arp_table(iwdev,
2184                                               cm_node->rem_addr,
2185                                               false,
2186                                               NULL,
2187                                               I40IW_ARP_RESOLVE);
2188                 if (cm_node->ipv4)
2189                         arpindex = i40iw_addr_resolve_neigh(iwdev,
2190                                                             cm_info->loc_addr[0],
2191                                                             cm_info->rem_addr[0],
2192                                                             oldarpindex);
2193 #if IS_ENABLED(CONFIG_IPV6)
2194                 else
2195                         arpindex = i40iw_addr_resolve_neigh_ipv6(iwdev,
2196                                                                  cm_info->loc_addr,
2197                                                                  cm_info->rem_addr,
2198                                                                  oldarpindex);
2199 #endif
2200         }
2201         if (arpindex < 0) {
2202                 i40iw_pr_err("cm_node arpindex\n");
2203                 kfree(cm_node);
2204                 return NULL;
2205         }
2206         ether_addr_copy(cm_node->rem_mac, iwdev->arp_table[arpindex].mac_addr);
2207         i40iw_add_hte_node(cm_core, cm_node);
2208         cm_core->stats_nodes_created++;
2209         return cm_node;
2210 }
2211
2212 /**
2213  * i40iw_rem_ref_cm_node - destroy an instance of a cm node
2214  * @cm_node: connection's node
2215  */
2216 static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *cm_node)
2217 {
2218         struct i40iw_cm_core *cm_core = cm_node->cm_core;
2219         struct i40iw_qp *iwqp;
2220         struct i40iw_cm_info nfo;
2221         unsigned long flags;
2222
2223         spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
2224         if (atomic_dec_return(&cm_node->ref_count)) {
2225                 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
2226                 return;
2227         }
2228         list_del(&cm_node->list);
2229         spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
2230
2231         /* if the node is destroyed before connection was accelerated */
2232         if (!cm_node->accelerated && cm_node->accept_pend) {
2233                 pr_err("node destroyed before established\n");
2234                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
2235         }
2236         if (cm_node->close_entry)
2237                 i40iw_handle_close_entry(cm_node, 0);
2238         if (cm_node->listener) {
2239                 i40iw_dec_refcnt_listen(cm_core, cm_node->listener, 0, true);
2240         } else {
2241                 if (!i40iw_listen_port_in_use(cm_core, htons(cm_node->loc_port)) &&
2242                     cm_node->apbvt_set && cm_node->iwdev) {
2243                         i40iw_manage_apbvt(cm_node->iwdev,
2244                                            cm_node->loc_port,
2245                                            I40IW_MANAGE_APBVT_DEL);
2246                         i40iw_get_addr_info(cm_node, &nfo);
2247                         if (cm_node->qhash_set) {
2248                                 i40iw_manage_qhash(cm_node->iwdev,
2249                                                    &nfo,
2250                                                    I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2251                                                    I40IW_QHASH_MANAGE_TYPE_DELETE,
2252                                                    NULL,
2253                                                    false);
2254                                 cm_node->qhash_set = 0;
2255                         }
2256                 }
2257         }
2258
2259         iwqp = cm_node->iwqp;
2260         if (iwqp) {
2261                 iwqp->cm_node = NULL;
2262                 i40iw_rem_ref(&iwqp->ibqp);
2263                 cm_node->iwqp = NULL;
2264         } else if (cm_node->qhash_set) {
2265                 i40iw_get_addr_info(cm_node, &nfo);
2266                 i40iw_manage_qhash(cm_node->iwdev,
2267                                    &nfo,
2268                                    I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2269                                    I40IW_QHASH_MANAGE_TYPE_DELETE,
2270                                    NULL,
2271                                    false);
2272                 cm_node->qhash_set = 0;
2273         }
2274
2275         cm_node->cm_core->stats_nodes_destroyed++;
2276         kfree(cm_node);
2277 }
2278
2279 /**
2280  * i40iw_handle_fin_pkt - FIN packet received
2281  * @cm_node: connection's node
2282  */
2283 static void i40iw_handle_fin_pkt(struct i40iw_cm_node *cm_node)
2284 {
2285         u32 ret;
2286
2287         switch (cm_node->state) {
2288         case I40IW_CM_STATE_SYN_RCVD:
2289         case I40IW_CM_STATE_SYN_SENT:
2290         case I40IW_CM_STATE_ESTABLISHED:
2291         case I40IW_CM_STATE_MPAREJ_RCVD:
2292                 cm_node->tcp_cntxt.rcv_nxt++;
2293                 i40iw_cleanup_retrans_entry(cm_node);
2294                 cm_node->state = I40IW_CM_STATE_LAST_ACK;
2295                 i40iw_send_fin(cm_node);
2296                 break;
2297         case I40IW_CM_STATE_MPAREQ_SENT:
2298                 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
2299                 cm_node->tcp_cntxt.rcv_nxt++;
2300                 i40iw_cleanup_retrans_entry(cm_node);
2301                 cm_node->state = I40IW_CM_STATE_CLOSED;
2302                 atomic_inc(&cm_node->ref_count);
2303                 i40iw_send_reset(cm_node);
2304                 break;
2305         case I40IW_CM_STATE_FIN_WAIT1:
2306                 cm_node->tcp_cntxt.rcv_nxt++;
2307                 i40iw_cleanup_retrans_entry(cm_node);
2308                 cm_node->state = I40IW_CM_STATE_CLOSING;
2309                 i40iw_send_ack(cm_node);
2310                 /*
2311                  * Wait for ACK as this is simultaneous close.
2312                  * After we receive ACK, do not send anything.
2313                  * Just rm the node.
2314                  */
2315                 break;
2316         case I40IW_CM_STATE_FIN_WAIT2:
2317                 cm_node->tcp_cntxt.rcv_nxt++;
2318                 i40iw_cleanup_retrans_entry(cm_node);
2319                 cm_node->state = I40IW_CM_STATE_TIME_WAIT;
2320                 i40iw_send_ack(cm_node);
2321                 ret =
2322                     i40iw_schedule_cm_timer(cm_node, NULL, I40IW_TIMER_TYPE_CLOSE, 1, 0);
2323                 if (ret)
2324                         i40iw_pr_err("node %p state = %d\n", cm_node, cm_node->state);
2325                 break;
2326         case I40IW_CM_STATE_TIME_WAIT:
2327                 cm_node->tcp_cntxt.rcv_nxt++;
2328                 i40iw_cleanup_retrans_entry(cm_node);
2329                 cm_node->state = I40IW_CM_STATE_CLOSED;
2330                 i40iw_rem_ref_cm_node(cm_node);
2331                 break;
2332         case I40IW_CM_STATE_OFFLOADED:
2333         default:
2334                 i40iw_pr_err("bad state node %p state = %d\n", cm_node, cm_node->state);
2335                 break;
2336         }
2337 }
2338
2339 /**
2340  * i40iw_handle_rst_pkt - process received RST packet
2341  * @cm_node: connection's node
2342  * @rbuf: receive buffer
2343  */
2344 static void i40iw_handle_rst_pkt(struct i40iw_cm_node *cm_node,
2345                                  struct i40iw_puda_buf *rbuf)
2346 {
2347         i40iw_cleanup_retrans_entry(cm_node);
2348         switch (cm_node->state) {
2349         case I40IW_CM_STATE_SYN_SENT:
2350         case I40IW_CM_STATE_MPAREQ_SENT:
2351                 switch (cm_node->mpa_frame_rev) {
2352                 case IETF_MPA_V2:
2353                         cm_node->mpa_frame_rev = IETF_MPA_V1;
2354                         /* send a syn and goto syn sent state */
2355                         cm_node->state = I40IW_CM_STATE_SYN_SENT;
2356                         if (i40iw_send_syn(cm_node, 0))
2357                                 i40iw_active_open_err(cm_node, false);
2358                         break;
2359                 case IETF_MPA_V1:
2360                 default:
2361                         i40iw_active_open_err(cm_node, false);
2362                         break;
2363                 }
2364                 break;
2365         case I40IW_CM_STATE_MPAREQ_RCVD:
2366                 atomic_add_return(1, &cm_node->passive_state);
2367                 break;
2368         case I40IW_CM_STATE_ESTABLISHED:
2369         case I40IW_CM_STATE_SYN_RCVD:
2370         case I40IW_CM_STATE_LISTENING:
2371                 i40iw_pr_err("Bad state state = %d\n", cm_node->state);
2372                 i40iw_passive_open_err(cm_node, false);
2373                 break;
2374         case I40IW_CM_STATE_OFFLOADED:
2375                 i40iw_active_open_err(cm_node, false);
2376                 break;
2377         case I40IW_CM_STATE_CLOSED:
2378                 break;
2379         case I40IW_CM_STATE_FIN_WAIT2:
2380         case I40IW_CM_STATE_FIN_WAIT1:
2381         case I40IW_CM_STATE_LAST_ACK:
2382                 cm_node->cm_id->rem_ref(cm_node->cm_id);
2383         case I40IW_CM_STATE_TIME_WAIT:
2384                 cm_node->state = I40IW_CM_STATE_CLOSED;
2385                 i40iw_rem_ref_cm_node(cm_node);
2386                 break;
2387         default:
2388                 break;
2389         }
2390 }
2391
2392 /**
2393  * i40iw_handle_rcv_mpa - Process a recv'd mpa buffer
2394  * @cm_node: connection's node
2395  * @rbuf: receive buffer
2396  */
2397 static void i40iw_handle_rcv_mpa(struct i40iw_cm_node *cm_node,
2398                                  struct i40iw_puda_buf *rbuf)
2399 {
2400         int ret;
2401         int datasize = rbuf->datalen;
2402         u8 *dataloc = rbuf->data;
2403
2404         enum i40iw_cm_event_type type = I40IW_CM_EVENT_UNKNOWN;
2405         u32 res_type;
2406
2407         ret = i40iw_parse_mpa(cm_node, dataloc, &res_type, datasize);
2408         if (ret) {
2409                 if (cm_node->state == I40IW_CM_STATE_MPAREQ_SENT)
2410                         i40iw_active_open_err(cm_node, true);
2411                 else
2412                         i40iw_passive_open_err(cm_node, true);
2413                 return;
2414         }
2415
2416         switch (cm_node->state) {
2417         case I40IW_CM_STATE_ESTABLISHED:
2418                 if (res_type == I40IW_MPA_REQUEST_REJECT)
2419                         i40iw_pr_err("state for reject\n");
2420                 cm_node->state = I40IW_CM_STATE_MPAREQ_RCVD;
2421                 type = I40IW_CM_EVENT_MPA_REQ;
2422                 i40iw_send_ack(cm_node);        /* ACK received MPA request */
2423                 atomic_set(&cm_node->passive_state,
2424                            I40IW_PASSIVE_STATE_INDICATED);
2425                 break;
2426         case I40IW_CM_STATE_MPAREQ_SENT:
2427                 i40iw_cleanup_retrans_entry(cm_node);
2428                 if (res_type == I40IW_MPA_REQUEST_REJECT) {
2429                         type = I40IW_CM_EVENT_MPA_REJECT;
2430                         cm_node->state = I40IW_CM_STATE_MPAREJ_RCVD;
2431                 } else {
2432                         type = I40IW_CM_EVENT_CONNECTED;
2433                         cm_node->state = I40IW_CM_STATE_OFFLOADED;
2434                         i40iw_send_ack(cm_node);
2435                 }
2436                 break;
2437         default:
2438                 pr_err("%s wrong cm_node state =%d\n", __func__, cm_node->state);
2439                 break;
2440         }
2441         i40iw_create_event(cm_node, type);
2442 }
2443
2444 /**
2445  * i40iw_indicate_pkt_err - Send up err event to cm
2446  * @cm_node: connection's node
2447  */
2448 static void i40iw_indicate_pkt_err(struct i40iw_cm_node *cm_node)
2449 {
2450         switch (cm_node->state) {
2451         case I40IW_CM_STATE_SYN_SENT:
2452         case I40IW_CM_STATE_MPAREQ_SENT:
2453                 i40iw_active_open_err(cm_node, true);
2454                 break;
2455         case I40IW_CM_STATE_ESTABLISHED:
2456         case I40IW_CM_STATE_SYN_RCVD:
2457                 i40iw_passive_open_err(cm_node, true);
2458                 break;
2459         case I40IW_CM_STATE_OFFLOADED:
2460         default:
2461                 break;
2462         }
2463 }
2464
2465 /**
2466  * i40iw_check_syn - Check for error on received syn ack
2467  * @cm_node: connection's node
2468  * @tcph: pointer tcp header
2469  */
2470 static int i40iw_check_syn(struct i40iw_cm_node *cm_node, struct tcphdr *tcph)
2471 {
2472         int err = 0;
2473
2474         if (ntohl(tcph->ack_seq) != cm_node->tcp_cntxt.loc_seq_num) {
2475                 err = 1;
2476                 i40iw_active_open_err(cm_node, true);
2477         }
2478         return err;
2479 }
2480
2481 /**
2482  * i40iw_check_seq - check seq numbers if OK
2483  * @cm_node: connection's node
2484  * @tcph: pointer tcp header
2485  */
2486 static int i40iw_check_seq(struct i40iw_cm_node *cm_node, struct tcphdr *tcph)
2487 {
2488         int err = 0;
2489         u32 seq;
2490         u32 ack_seq;
2491         u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
2492         u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
2493         u32 rcv_wnd;
2494
2495         seq = ntohl(tcph->seq);
2496         ack_seq = ntohl(tcph->ack_seq);
2497         rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
2498         if (ack_seq != loc_seq_num)
2499                 err = -1;
2500         else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
2501                 err = -1;
2502         if (err) {
2503                 i40iw_pr_err("seq number\n");
2504                 i40iw_indicate_pkt_err(cm_node);
2505         }
2506         return err;
2507 }
2508
2509 /**
2510  * i40iw_handle_syn_pkt - is for Passive node
2511  * @cm_node: connection's node
2512  * @rbuf: receive buffer
2513  */
2514 static void i40iw_handle_syn_pkt(struct i40iw_cm_node *cm_node,
2515                                  struct i40iw_puda_buf *rbuf)
2516 {
2517         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2518         int ret;
2519         u32 inc_sequence;
2520         int optionsize;
2521         struct i40iw_cm_info nfo;
2522
2523         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2524         inc_sequence = ntohl(tcph->seq);
2525
2526         switch (cm_node->state) {
2527         case I40IW_CM_STATE_SYN_SENT:
2528         case I40IW_CM_STATE_MPAREQ_SENT:
2529                 /* Rcvd syn on active open connection */
2530                 i40iw_active_open_err(cm_node, 1);
2531                 break;
2532         case I40IW_CM_STATE_LISTENING:
2533                 /* Passive OPEN */
2534                 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
2535                     cm_node->listener->backlog) {
2536                         cm_node->cm_core->stats_backlog_drops++;
2537                         i40iw_passive_open_err(cm_node, false);
2538                         break;
2539                 }
2540                 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1);
2541                 if (ret) {
2542                         i40iw_passive_open_err(cm_node, false);
2543                         /* drop pkt */
2544                         break;
2545                 }
2546                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2547                 cm_node->accept_pend = 1;
2548                 atomic_inc(&cm_node->listener->pend_accepts_cnt);
2549
2550                 cm_node->state = I40IW_CM_STATE_SYN_RCVD;
2551                 i40iw_get_addr_info(cm_node, &nfo);
2552                 ret = i40iw_manage_qhash(cm_node->iwdev,
2553                                          &nfo,
2554                                          I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2555                                          I40IW_QHASH_MANAGE_TYPE_ADD,
2556                                          (void *)cm_node,
2557                                          false);
2558                 cm_node->qhash_set = true;
2559                 break;
2560         case I40IW_CM_STATE_CLOSED:
2561                 i40iw_cleanup_retrans_entry(cm_node);
2562                 atomic_inc(&cm_node->ref_count);
2563                 i40iw_send_reset(cm_node);
2564                 break;
2565         case I40IW_CM_STATE_OFFLOADED:
2566         case I40IW_CM_STATE_ESTABLISHED:
2567         case I40IW_CM_STATE_FIN_WAIT1:
2568         case I40IW_CM_STATE_FIN_WAIT2:
2569         case I40IW_CM_STATE_MPAREQ_RCVD:
2570         case I40IW_CM_STATE_LAST_ACK:
2571         case I40IW_CM_STATE_CLOSING:
2572         case I40IW_CM_STATE_UNKNOWN:
2573         default:
2574                 break;
2575         }
2576 }
2577
2578 /**
2579  * i40iw_handle_synack_pkt - Process SYN+ACK packet (active side)
2580  * @cm_node: connection's node
2581  * @rbuf: receive buffer
2582  */
2583 static void i40iw_handle_synack_pkt(struct i40iw_cm_node *cm_node,
2584                                     struct i40iw_puda_buf *rbuf)
2585 {
2586         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2587         int ret;
2588         u32 inc_sequence;
2589         int optionsize;
2590
2591         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2592         inc_sequence = ntohl(tcph->seq);
2593         switch (cm_node->state) {
2594         case I40IW_CM_STATE_SYN_SENT:
2595                 i40iw_cleanup_retrans_entry(cm_node);
2596                 /* active open */
2597                 if (i40iw_check_syn(cm_node, tcph)) {
2598                         i40iw_pr_err("check syn fail\n");
2599                         return;
2600                 }
2601                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2602                 /* setup options */
2603                 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 0);
2604                 if (ret) {
2605                         i40iw_debug(cm_node->dev,
2606                                     I40IW_DEBUG_CM,
2607                                     "cm_node=%p tcp_options failed\n",
2608                                     cm_node);
2609                         break;
2610                 }
2611                 i40iw_cleanup_retrans_entry(cm_node);
2612                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2613                 i40iw_send_ack(cm_node);        /* ACK  for the syn_ack */
2614                 ret = i40iw_send_mpa_request(cm_node);
2615                 if (ret) {
2616                         i40iw_debug(cm_node->dev,
2617                                     I40IW_DEBUG_CM,
2618                                     "cm_node=%p i40iw_send_mpa_request failed\n",
2619                                     cm_node);
2620                         break;
2621                 }
2622                 cm_node->state = I40IW_CM_STATE_MPAREQ_SENT;
2623                 break;
2624         case I40IW_CM_STATE_MPAREQ_RCVD:
2625                 i40iw_passive_open_err(cm_node, true);
2626                 break;
2627         case I40IW_CM_STATE_LISTENING:
2628                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2629                 i40iw_cleanup_retrans_entry(cm_node);
2630                 cm_node->state = I40IW_CM_STATE_CLOSED;
2631                 i40iw_send_reset(cm_node);
2632                 break;
2633         case I40IW_CM_STATE_CLOSED:
2634                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2635                 i40iw_cleanup_retrans_entry(cm_node);
2636                 atomic_inc(&cm_node->ref_count);
2637                 i40iw_send_reset(cm_node);
2638                 break;
2639         case I40IW_CM_STATE_ESTABLISHED:
2640         case I40IW_CM_STATE_FIN_WAIT1:
2641         case I40IW_CM_STATE_FIN_WAIT2:
2642         case I40IW_CM_STATE_LAST_ACK:
2643         case I40IW_CM_STATE_OFFLOADED:
2644         case I40IW_CM_STATE_CLOSING:
2645         case I40IW_CM_STATE_UNKNOWN:
2646         case I40IW_CM_STATE_MPAREQ_SENT:
2647         default:
2648                 break;
2649         }
2650 }
2651
2652 /**
2653  * i40iw_handle_ack_pkt - process packet with ACK
2654  * @cm_node: connection's node
2655  * @rbuf: receive buffer
2656  */
2657 static int i40iw_handle_ack_pkt(struct i40iw_cm_node *cm_node,
2658                                 struct i40iw_puda_buf *rbuf)
2659 {
2660         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2661         u32 inc_sequence;
2662         int ret = 0;
2663         int optionsize;
2664         u32 datasize = rbuf->datalen;
2665
2666         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2667
2668         if (i40iw_check_seq(cm_node, tcph))
2669                 return -EINVAL;
2670
2671         inc_sequence = ntohl(tcph->seq);
2672         switch (cm_node->state) {
2673         case I40IW_CM_STATE_SYN_RCVD:
2674                 i40iw_cleanup_retrans_entry(cm_node);
2675                 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1);
2676                 if (ret)
2677                         break;
2678                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2679                 cm_node->state = I40IW_CM_STATE_ESTABLISHED;
2680                 if (datasize) {
2681                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2682                         i40iw_handle_rcv_mpa(cm_node, rbuf);
2683                 }
2684                 break;
2685         case I40IW_CM_STATE_ESTABLISHED:
2686                 i40iw_cleanup_retrans_entry(cm_node);
2687                 if (datasize) {
2688                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2689                         i40iw_handle_rcv_mpa(cm_node, rbuf);
2690                 }
2691                 break;
2692         case I40IW_CM_STATE_MPAREQ_SENT:
2693                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2694                 if (datasize) {
2695                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2696                         i40iw_handle_rcv_mpa(cm_node, rbuf);
2697                 }
2698                 break;
2699         case I40IW_CM_STATE_LISTENING:
2700                 i40iw_cleanup_retrans_entry(cm_node);
2701                 cm_node->state = I40IW_CM_STATE_CLOSED;
2702                 i40iw_send_reset(cm_node);
2703                 break;
2704         case I40IW_CM_STATE_CLOSED:
2705                 i40iw_cleanup_retrans_entry(cm_node);
2706                 atomic_inc(&cm_node->ref_count);
2707                 i40iw_send_reset(cm_node);
2708                 break;
2709         case I40IW_CM_STATE_LAST_ACK:
2710         case I40IW_CM_STATE_CLOSING:
2711                 i40iw_cleanup_retrans_entry(cm_node);
2712                 cm_node->state = I40IW_CM_STATE_CLOSED;
2713                 if (!cm_node->accept_pend)
2714                         cm_node->cm_id->rem_ref(cm_node->cm_id);
2715                 i40iw_rem_ref_cm_node(cm_node);
2716                 break;
2717         case I40IW_CM_STATE_FIN_WAIT1:
2718                 i40iw_cleanup_retrans_entry(cm_node);
2719                 cm_node->state = I40IW_CM_STATE_FIN_WAIT2;
2720                 break;
2721         case I40IW_CM_STATE_SYN_SENT:
2722         case I40IW_CM_STATE_FIN_WAIT2:
2723         case I40IW_CM_STATE_OFFLOADED:
2724         case I40IW_CM_STATE_MPAREQ_RCVD:
2725         case I40IW_CM_STATE_UNKNOWN:
2726         default:
2727                 i40iw_cleanup_retrans_entry(cm_node);
2728                 break;
2729         }
2730         return ret;
2731 }
2732
2733 /**
2734  * i40iw_process_packet - process cm packet
2735  * @cm_node: connection's node
2736  * @rbuf: receive buffer
2737  */
2738 static void i40iw_process_packet(struct i40iw_cm_node *cm_node,
2739                                  struct i40iw_puda_buf *rbuf)
2740 {
2741         enum i40iw_tcpip_pkt_type pkt_type = I40IW_PKT_TYPE_UNKNOWN;
2742         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2743         u32 fin_set = 0;
2744         int ret;
2745
2746         if (tcph->rst) {
2747                 pkt_type = I40IW_PKT_TYPE_RST;
2748         } else if (tcph->syn) {
2749                 pkt_type = I40IW_PKT_TYPE_SYN;
2750                 if (tcph->ack)
2751                         pkt_type = I40IW_PKT_TYPE_SYNACK;
2752         } else if (tcph->ack) {
2753                 pkt_type = I40IW_PKT_TYPE_ACK;
2754         }
2755         if (tcph->fin)
2756                 fin_set = 1;
2757
2758         switch (pkt_type) {
2759         case I40IW_PKT_TYPE_SYN:
2760                 i40iw_handle_syn_pkt(cm_node, rbuf);
2761                 break;
2762         case I40IW_PKT_TYPE_SYNACK:
2763                 i40iw_handle_synack_pkt(cm_node, rbuf);
2764                 break;
2765         case I40IW_PKT_TYPE_ACK:
2766                 ret = i40iw_handle_ack_pkt(cm_node, rbuf);
2767                 if (fin_set && !ret)
2768                         i40iw_handle_fin_pkt(cm_node);
2769                 break;
2770         case I40IW_PKT_TYPE_RST:
2771                 i40iw_handle_rst_pkt(cm_node, rbuf);
2772                 break;
2773         default:
2774                 if (fin_set &&
2775                     (!i40iw_check_seq(cm_node, (struct tcphdr *)rbuf->tcph)))
2776                         i40iw_handle_fin_pkt(cm_node);
2777                 break;
2778         }
2779 }
2780
2781 /**
2782  * i40iw_make_listen_node - create a listen node with params
2783  * @cm_core: cm's core
2784  * @iwdev: iwarp device structure
2785  * @cm_info: quad info for connection
2786  */
2787 static struct i40iw_cm_listener *i40iw_make_listen_node(
2788                                         struct i40iw_cm_core *cm_core,
2789                                         struct i40iw_device *iwdev,
2790                                         struct i40iw_cm_info *cm_info)
2791 {
2792         struct i40iw_cm_listener *listener;
2793         unsigned long flags;
2794
2795         /* cannot have multiple matching listeners */
2796         listener = i40iw_find_listener(cm_core, cm_info->loc_addr,
2797                                        cm_info->loc_port,
2798                                        cm_info->vlan_id,
2799                                        I40IW_CM_LISTENER_EITHER_STATE);
2800         if (listener &&
2801             (listener->listener_state == I40IW_CM_LISTENER_ACTIVE_STATE)) {
2802                 atomic_dec(&listener->ref_count);
2803                 i40iw_debug(cm_core->dev,
2804                             I40IW_DEBUG_CM,
2805                             "Not creating listener since it already exists\n");
2806                 return NULL;
2807         }
2808
2809         if (!listener) {
2810                 /* create a CM listen node (1/2 node to compare incoming traffic to) */
2811                 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
2812                 if (!listener)
2813                         return NULL;
2814                 cm_core->stats_listen_nodes_created++;
2815                 memcpy(listener->loc_addr, cm_info->loc_addr, sizeof(listener->loc_addr));
2816                 listener->loc_port = cm_info->loc_port;
2817
2818                 INIT_LIST_HEAD(&listener->child_listen_list);
2819
2820                 atomic_set(&listener->ref_count, 1);
2821         } else {
2822                 listener->reused_node = 1;
2823         }
2824
2825         listener->cm_id = cm_info->cm_id;
2826         listener->ipv4 = cm_info->ipv4;
2827         listener->vlan_id = cm_info->vlan_id;
2828         atomic_set(&listener->pend_accepts_cnt, 0);
2829         listener->cm_core = cm_core;
2830         listener->iwdev = iwdev;
2831
2832         listener->backlog = cm_info->backlog;
2833         listener->listener_state = I40IW_CM_LISTENER_ACTIVE_STATE;
2834
2835         if (!listener->reused_node) {
2836                 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2837                 list_add(&listener->list, &cm_core->listen_nodes);
2838                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2839         }
2840
2841         return listener;
2842 }
2843
2844 /**
2845  * i40iw_create_cm_node - make a connection node with params
2846  * @cm_core: cm's core
2847  * @iwdev: iwarp device structure
2848  * @private_data_len: len to provate data for mpa request
2849  * @private_data: pointer to private data for connection
2850  * @cm_info: quad info for connection
2851  */
2852 static struct i40iw_cm_node *i40iw_create_cm_node(
2853                                         struct i40iw_cm_core *cm_core,
2854                                         struct i40iw_device *iwdev,
2855                                         u16 private_data_len,
2856                                         void *private_data,
2857                                         struct i40iw_cm_info *cm_info)
2858 {
2859         int ret;
2860         struct i40iw_cm_node *cm_node;
2861         struct i40iw_cm_listener *loopback_remotelistener;
2862         struct i40iw_cm_node *loopback_remotenode;
2863         struct i40iw_cm_info loopback_cm_info;
2864
2865         /* create a CM connection node */
2866         cm_node = i40iw_make_cm_node(cm_core, iwdev, cm_info, NULL);
2867         if (!cm_node)
2868                 return NULL;
2869         /* set our node side to client (active) side */
2870         cm_node->tcp_cntxt.client = 1;
2871         cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE;
2872
2873         if (!memcmp(cm_info->loc_addr, cm_info->rem_addr, sizeof(cm_info->loc_addr))) {
2874                 loopback_remotelistener = i40iw_find_listener(
2875                                                 cm_core,
2876                                                 cm_info->rem_addr,
2877                                                 cm_node->rem_port,
2878                                                 cm_node->vlan_id,
2879                                                 I40IW_CM_LISTENER_ACTIVE_STATE);
2880                 if (!loopback_remotelistener) {
2881                         i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
2882                 } else {
2883                         loopback_cm_info = *cm_info;
2884                         loopback_cm_info.loc_port = cm_info->rem_port;
2885                         loopback_cm_info.rem_port = cm_info->loc_port;
2886                         loopback_cm_info.cm_id = loopback_remotelistener->cm_id;
2887                         loopback_cm_info.ipv4 = cm_info->ipv4;
2888                         loopback_remotenode = i40iw_make_cm_node(cm_core,
2889                                                                  iwdev,
2890                                                                  &loopback_cm_info,
2891                                                                  loopback_remotelistener);
2892                         if (!loopback_remotenode) {
2893                                 i40iw_rem_ref_cm_node(cm_node);
2894                                 return NULL;
2895                         }
2896                         cm_core->stats_loopbacks++;
2897                         loopback_remotenode->loopbackpartner = cm_node;
2898                         loopback_remotenode->tcp_cntxt.rcv_wscale =
2899                                 I40IW_CM_DEFAULT_RCV_WND_SCALE;
2900                         cm_node->loopbackpartner = loopback_remotenode;
2901                         memcpy(loopback_remotenode->pdata_buf, private_data,
2902                                private_data_len);
2903                         loopback_remotenode->pdata.size = private_data_len;
2904
2905                         cm_node->state = I40IW_CM_STATE_OFFLOADED;
2906                         cm_node->tcp_cntxt.rcv_nxt =
2907                                 loopback_remotenode->tcp_cntxt.loc_seq_num;
2908                         loopback_remotenode->tcp_cntxt.rcv_nxt =
2909                                 cm_node->tcp_cntxt.loc_seq_num;
2910                         cm_node->tcp_cntxt.max_snd_wnd =
2911                                 loopback_remotenode->tcp_cntxt.rcv_wnd;
2912                         loopback_remotenode->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
2913                         cm_node->tcp_cntxt.snd_wnd = loopback_remotenode->tcp_cntxt.rcv_wnd;
2914                         loopback_remotenode->tcp_cntxt.snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
2915                         cm_node->tcp_cntxt.snd_wscale = loopback_remotenode->tcp_cntxt.rcv_wscale;
2916                         loopback_remotenode->tcp_cntxt.snd_wscale = cm_node->tcp_cntxt.rcv_wscale;
2917                         loopback_remotenode->state = I40IW_CM_STATE_MPAREQ_RCVD;
2918                         i40iw_create_event(loopback_remotenode, I40IW_CM_EVENT_MPA_REQ);
2919                 }
2920                 return cm_node;
2921         }
2922
2923         cm_node->pdata.size = private_data_len;
2924         cm_node->pdata.addr = cm_node->pdata_buf;
2925
2926         memcpy(cm_node->pdata_buf, private_data, private_data_len);
2927
2928         cm_node->state = I40IW_CM_STATE_SYN_SENT;
2929         ret = i40iw_send_syn(cm_node, 0);
2930
2931         if (ret) {
2932                 if (cm_node->ipv4)
2933                         i40iw_debug(cm_node->dev,
2934                                     I40IW_DEBUG_CM,
2935                                     "Api - connect() FAILED: dest addr=%pI4",
2936                                     cm_node->rem_addr);
2937                 else
2938                         i40iw_debug(cm_node->dev, I40IW_DEBUG_CM,
2939                                     "Api - connect() FAILED: dest addr=%pI6",
2940                                     cm_node->rem_addr);
2941                 i40iw_rem_ref_cm_node(cm_node);
2942                 cm_node = NULL;
2943         }
2944
2945         if (cm_node)
2946                 i40iw_debug(cm_node->dev,
2947                             I40IW_DEBUG_CM,
2948                             "Api - connect(): port=0x%04x, cm_node=%p, cm_id = %p.\n",
2949                             cm_node->rem_port,
2950                             cm_node,
2951                             cm_node->cm_id);
2952
2953         return cm_node;
2954 }
2955
2956 /**
2957  * i40iw_cm_reject - reject and teardown a connection
2958  * @cm_node: connection's node
2959  * @pdate: ptr to private data for reject
2960  * @plen: size of private data
2961  */
2962 static int i40iw_cm_reject(struct i40iw_cm_node *cm_node, const void *pdata, u8 plen)
2963 {
2964         int ret = 0;
2965         int err;
2966         int passive_state;
2967         struct iw_cm_id *cm_id = cm_node->cm_id;
2968         struct i40iw_cm_node *loopback = cm_node->loopbackpartner;
2969
2970         if (cm_node->tcp_cntxt.client)
2971                 return ret;
2972         i40iw_cleanup_retrans_entry(cm_node);
2973
2974         if (!loopback) {
2975                 passive_state = atomic_add_return(1, &cm_node->passive_state);
2976                 if (passive_state == I40IW_SEND_RESET_EVENT) {
2977                         cm_node->state = I40IW_CM_STATE_CLOSED;
2978                         i40iw_rem_ref_cm_node(cm_node);
2979                 } else {
2980                         if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
2981                                 i40iw_rem_ref_cm_node(cm_node);
2982                         } else {
2983                                 ret = i40iw_send_mpa_reject(cm_node, pdata, plen);
2984                                 if (ret) {
2985                                         cm_node->state = I40IW_CM_STATE_CLOSED;
2986                                         err = i40iw_send_reset(cm_node);
2987                                         if (err)
2988                                                 i40iw_pr_err("send reset failed\n");
2989                                 } else {
2990                                         cm_id->add_ref(cm_id);
2991                                 }
2992                         }
2993                 }
2994         } else {
2995                 cm_node->cm_id = NULL;
2996                 if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
2997                         i40iw_rem_ref_cm_node(cm_node);
2998                         i40iw_rem_ref_cm_node(loopback);
2999                 } else {
3000                         ret = i40iw_send_cm_event(loopback,
3001                                                   loopback->cm_id,
3002                                                   IW_CM_EVENT_CONNECT_REPLY,
3003                                                   -ECONNREFUSED);
3004                         i40iw_rem_ref_cm_node(cm_node);
3005                         loopback->state = I40IW_CM_STATE_CLOSING;
3006
3007                         cm_id = loopback->cm_id;
3008                         i40iw_rem_ref_cm_node(loopback);
3009                         cm_id->rem_ref(cm_id);
3010                 }
3011         }
3012
3013         return ret;
3014 }
3015
3016 /**
3017  * i40iw_cm_close - close of cm connection
3018  * @cm_node: connection's node
3019  */
3020 static int i40iw_cm_close(struct i40iw_cm_node *cm_node)
3021 {
3022         int ret = 0;
3023
3024         if (!cm_node)
3025                 return -EINVAL;
3026
3027         switch (cm_node->state) {
3028         case I40IW_CM_STATE_SYN_RCVD:
3029         case I40IW_CM_STATE_SYN_SENT:
3030         case I40IW_CM_STATE_ONE_SIDE_ESTABLISHED:
3031         case I40IW_CM_STATE_ESTABLISHED:
3032         case I40IW_CM_STATE_ACCEPTING:
3033         case I40IW_CM_STATE_MPAREQ_SENT:
3034         case I40IW_CM_STATE_MPAREQ_RCVD:
3035                 i40iw_cleanup_retrans_entry(cm_node);
3036                 i40iw_send_reset(cm_node);
3037                 break;
3038         case I40IW_CM_STATE_CLOSE_WAIT:
3039                 cm_node->state = I40IW_CM_STATE_LAST_ACK;
3040                 i40iw_send_fin(cm_node);
3041                 break;
3042         case I40IW_CM_STATE_FIN_WAIT1:
3043         case I40IW_CM_STATE_FIN_WAIT2:
3044         case I40IW_CM_STATE_LAST_ACK:
3045         case I40IW_CM_STATE_TIME_WAIT:
3046         case I40IW_CM_STATE_CLOSING:
3047                 ret = -1;
3048                 break;
3049         case I40IW_CM_STATE_LISTENING:
3050                 i40iw_cleanup_retrans_entry(cm_node);
3051                 i40iw_send_reset(cm_node);
3052                 break;
3053         case I40IW_CM_STATE_MPAREJ_RCVD:
3054         case I40IW_CM_STATE_UNKNOWN:
3055         case I40IW_CM_STATE_INITED:
3056         case I40IW_CM_STATE_CLOSED:
3057         case I40IW_CM_STATE_LISTENER_DESTROYED:
3058                 i40iw_rem_ref_cm_node(cm_node);
3059                 break;
3060         case I40IW_CM_STATE_OFFLOADED:
3061                 if (cm_node->send_entry)
3062                         i40iw_pr_err("send_entry\n");
3063                 i40iw_rem_ref_cm_node(cm_node);
3064                 break;
3065         }
3066         return ret;
3067 }
3068
3069 /**
3070  * i40iw_receive_ilq - recv an ETHERNET packet, and process it
3071  * through CM
3072  * @dev: FPK dev struct
3073  * @rbuf: receive buffer
3074  */
3075 void i40iw_receive_ilq(struct i40iw_sc_dev *dev, struct i40iw_puda_buf *rbuf)
3076 {
3077         struct i40iw_cm_node *cm_node;
3078         struct i40iw_cm_listener *listener;
3079         struct iphdr *iph;
3080         struct ipv6hdr *ip6h;
3081         struct tcphdr *tcph;
3082         struct i40iw_cm_info cm_info;
3083         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
3084         struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3085         struct vlan_ethhdr *ethh;
3086
3087         /* if vlan, then maclen = 18 else 14 */
3088         iph = (struct iphdr *)rbuf->iph;
3089         memset(&cm_info, 0, sizeof(cm_info));
3090
3091         i40iw_debug_buf(dev,
3092                         I40IW_DEBUG_ILQ,
3093                         "RECEIVE ILQ BUFFER",
3094                         rbuf->mem.va,
3095                         rbuf->totallen);
3096         ethh = (struct vlan_ethhdr *)rbuf->mem.va;
3097
3098         if (ethh->h_vlan_proto == htons(ETH_P_8021Q)) {
3099                 cm_info.vlan_id = ntohs(ethh->h_vlan_TCI) & VLAN_VID_MASK;
3100                 i40iw_debug(cm_core->dev,
3101                             I40IW_DEBUG_CM,
3102                             "%s vlan_id=%d\n",
3103                             __func__,
3104                             cm_info.vlan_id);
3105         } else {
3106                 cm_info.vlan_id = I40IW_NO_VLAN;
3107         }
3108         tcph = (struct tcphdr *)rbuf->tcph;
3109
3110         if (rbuf->ipv4) {
3111                 cm_info.loc_addr[0] = ntohl(iph->daddr);
3112                 cm_info.rem_addr[0] = ntohl(iph->saddr);
3113                 cm_info.ipv4 = true;
3114         } else {
3115                 ip6h = (struct ipv6hdr *)rbuf->iph;
3116                 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3117                                     ip6h->daddr.in6_u.u6_addr32);
3118                 i40iw_copy_ip_ntohl(cm_info.rem_addr,
3119                                     ip6h->saddr.in6_u.u6_addr32);
3120                 cm_info.ipv4 = false;
3121         }
3122         cm_info.loc_port = ntohs(tcph->dest);
3123         cm_info.rem_port = ntohs(tcph->source);
3124         cm_node = i40iw_find_node(cm_core,
3125                                   cm_info.rem_port,
3126                                   cm_info.rem_addr,
3127                                   cm_info.loc_port,
3128                                   cm_info.loc_addr,
3129                                   true);
3130
3131         if (!cm_node) {
3132                 /* Only type of packet accepted are for */
3133                 /* the PASSIVE open (syn only) */
3134                 if (!tcph->syn || tcph->ack)
3135                         return;
3136                 listener =
3137                     i40iw_find_listener(cm_core,
3138                                         cm_info.loc_addr,
3139                                         cm_info.loc_port,
3140                                         cm_info.vlan_id,
3141                                         I40IW_CM_LISTENER_ACTIVE_STATE);
3142                 if (!listener) {
3143                         cm_info.cm_id = NULL;
3144                         i40iw_debug(cm_core->dev,
3145                                     I40IW_DEBUG_CM,
3146                                     "%s no listener found\n",
3147                                     __func__);
3148                         return;
3149                 }
3150                 cm_info.cm_id = listener->cm_id;
3151                 cm_node = i40iw_make_cm_node(cm_core, iwdev, &cm_info, listener);
3152                 if (!cm_node) {
3153                         i40iw_debug(cm_core->dev,
3154                                     I40IW_DEBUG_CM,
3155                                     "%s allocate node failed\n",
3156                                     __func__);
3157                         atomic_dec(&listener->ref_count);
3158                         return;
3159                 }
3160                 if (!tcph->rst && !tcph->fin) {
3161                         cm_node->state = I40IW_CM_STATE_LISTENING;
3162                 } else {
3163                         i40iw_rem_ref_cm_node(cm_node);
3164                         return;
3165                 }
3166                 atomic_inc(&cm_node->ref_count);
3167         } else if (cm_node->state == I40IW_CM_STATE_OFFLOADED) {
3168                 i40iw_rem_ref_cm_node(cm_node);
3169                 return;
3170         }
3171         i40iw_process_packet(cm_node, rbuf);
3172         i40iw_rem_ref_cm_node(cm_node);
3173 }
3174
3175 /**
3176  * i40iw_setup_cm_core - allocate a top level instance of a cm
3177  * core
3178  * @iwdev: iwarp device structure
3179  */
3180 void i40iw_setup_cm_core(struct i40iw_device *iwdev)
3181 {
3182         struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3183
3184         cm_core->iwdev = iwdev;
3185         cm_core->dev = &iwdev->sc_dev;
3186
3187         INIT_LIST_HEAD(&cm_core->connected_nodes);
3188         INIT_LIST_HEAD(&cm_core->listen_nodes);
3189
3190         init_timer(&cm_core->tcp_timer);
3191         cm_core->tcp_timer.function = i40iw_cm_timer_tick;
3192         cm_core->tcp_timer.data = (unsigned long)cm_core;
3193
3194         spin_lock_init(&cm_core->ht_lock);
3195         spin_lock_init(&cm_core->listen_list_lock);
3196
3197         cm_core->event_wq = create_singlethread_workqueue("iwewq");
3198         cm_core->disconn_wq = create_singlethread_workqueue("iwdwq");
3199 }
3200
3201 /**
3202  * i40iw_cleanup_cm_core - deallocate a top level instance of a
3203  * cm core
3204  * @cm_core: cm's core
3205  */
3206 void i40iw_cleanup_cm_core(struct i40iw_cm_core *cm_core)
3207 {
3208         unsigned long flags;
3209
3210         if (!cm_core)
3211                 return;
3212
3213         spin_lock_irqsave(&cm_core->ht_lock, flags);
3214         if (timer_pending(&cm_core->tcp_timer))
3215                 del_timer_sync(&cm_core->tcp_timer);
3216         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
3217
3218         destroy_workqueue(cm_core->event_wq);
3219         destroy_workqueue(cm_core->disconn_wq);
3220 }
3221
3222 /**
3223  * i40iw_init_tcp_ctx - setup qp context
3224  * @cm_node: connection's node
3225  * @tcp_info: offload info for tcp
3226  * @iwqp: associate qp for the connection
3227  */
3228 static void i40iw_init_tcp_ctx(struct i40iw_cm_node *cm_node,
3229                                struct i40iw_tcp_offload_info *tcp_info,
3230                                struct i40iw_qp *iwqp)
3231 {
3232         tcp_info->ipv4 = cm_node->ipv4;
3233         tcp_info->drop_ooo_seg = true;
3234         tcp_info->wscale = true;
3235         tcp_info->ignore_tcp_opt = true;
3236         tcp_info->ignore_tcp_uns_opt = true;
3237         tcp_info->no_nagle = false;
3238
3239         tcp_info->ttl = I40IW_DEFAULT_TTL;
3240         tcp_info->rtt_var = cpu_to_le32(I40IW_DEFAULT_RTT_VAR);
3241         tcp_info->ss_thresh = cpu_to_le32(I40IW_DEFAULT_SS_THRESH);
3242         tcp_info->rexmit_thresh = I40IW_DEFAULT_REXMIT_THRESH;
3243
3244         tcp_info->tcp_state = I40IW_TCP_STATE_ESTABLISHED;
3245         tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale;
3246         tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale;
3247
3248         tcp_info->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3249         tcp_info->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
3250         tcp_info->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
3251         tcp_info->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3252
3253         tcp_info->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3254         tcp_info->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss);
3255         tcp_info->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
3256         tcp_info->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3257         tcp_info->max_snd_window = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
3258         tcp_info->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
3259                                         cm_node->tcp_cntxt.rcv_wscale);
3260
3261         tcp_info->flow_label = 0;
3262         tcp_info->snd_mss = cpu_to_le32(((u32)cm_node->tcp_cntxt.mss));
3263         if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
3264                 tcp_info->insert_vlan_tag = true;
3265                 tcp_info->vlan_tag = cpu_to_le16(cm_node->vlan_id);
3266         }
3267         if (cm_node->ipv4) {
3268                 tcp_info->src_port = cpu_to_le16(cm_node->loc_port);
3269                 tcp_info->dst_port = cpu_to_le16(cm_node->rem_port);
3270
3271                 tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[0]);
3272                 tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[0]);
3273                 tcp_info->arp_idx = cpu_to_le32(i40iw_arp_table(iwqp->iwdev,
3274                                                                 &tcp_info->dest_ip_addr3,
3275                                                                 true,
3276                                                                 NULL,
3277                                                                 I40IW_ARP_RESOLVE));
3278         } else {
3279                 tcp_info->src_port = cpu_to_le16(cm_node->loc_port);
3280                 tcp_info->dst_port = cpu_to_le16(cm_node->rem_port);
3281                 tcp_info->dest_ip_addr0 = cpu_to_le32(cm_node->rem_addr[0]);
3282                 tcp_info->dest_ip_addr1 = cpu_to_le32(cm_node->rem_addr[1]);
3283                 tcp_info->dest_ip_addr2 = cpu_to_le32(cm_node->rem_addr[2]);
3284                 tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[3]);
3285                 tcp_info->local_ipaddr0 = cpu_to_le32(cm_node->loc_addr[0]);
3286                 tcp_info->local_ipaddr1 = cpu_to_le32(cm_node->loc_addr[1]);
3287                 tcp_info->local_ipaddr2 = cpu_to_le32(cm_node->loc_addr[2]);
3288                 tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[3]);
3289                 tcp_info->arp_idx = cpu_to_le32(i40iw_arp_table(
3290                                                         iwqp->iwdev,
3291                                                         &tcp_info->dest_ip_addr0,
3292                                                         false,
3293                                                         NULL,
3294                                                         I40IW_ARP_RESOLVE));
3295         }
3296 }
3297
3298 /**
3299  * i40iw_cm_init_tsa_conn - setup qp for RTS
3300  * @iwqp: associate qp for the connection
3301  * @cm_node: connection's node
3302  */
3303 static void i40iw_cm_init_tsa_conn(struct i40iw_qp *iwqp,
3304                                    struct i40iw_cm_node *cm_node)
3305 {
3306         struct i40iw_tcp_offload_info tcp_info;
3307         struct i40iwarp_offload_info *iwarp_info;
3308         struct i40iw_qp_host_ctx_info *ctx_info;
3309         struct i40iw_device *iwdev = iwqp->iwdev;
3310         struct i40iw_sc_dev *dev = &iwqp->iwdev->sc_dev;
3311
3312         memset(&tcp_info, 0x00, sizeof(struct i40iw_tcp_offload_info));
3313         iwarp_info = &iwqp->iwarp_info;
3314         ctx_info = &iwqp->ctx_info;
3315
3316         ctx_info->tcp_info = &tcp_info;
3317         ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id;
3318         ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id;
3319
3320         iwarp_info->ord_size = cm_node->ord_size;
3321         iwarp_info->ird_size = i40iw_derive_hw_ird_setting(cm_node->ird_size);
3322
3323         if (iwarp_info->ord_size == 1)
3324                 iwarp_info->ord_size = 2;
3325
3326         iwarp_info->rd_enable = true;
3327         iwarp_info->rdmap_ver = 1;
3328         iwarp_info->ddp_ver = 1;
3329
3330         iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id;
3331
3332         ctx_info->tcp_info_valid = true;
3333         ctx_info->iwarp_info_valid = true;
3334
3335         i40iw_init_tcp_ctx(cm_node, &tcp_info, iwqp);
3336         if (cm_node->snd_mark_en) {
3337                 iwarp_info->snd_mark_en = true;
3338                 iwarp_info->snd_mark_offset = (tcp_info.snd_nxt &
3339                                 SNDMARKER_SEQNMASK) + cm_node->lsmm_size;
3340         }
3341
3342         cm_node->state = I40IW_CM_STATE_OFFLOADED;
3343         tcp_info.tcp_state = I40IW_TCP_STATE_ESTABLISHED;
3344         tcp_info.src_mac_addr_idx = iwdev->mac_ip_table_idx;
3345
3346         dev->iw_priv_qp_ops->qp_setctx(&iwqp->sc_qp, (u64 *)(iwqp->host_ctx.va), ctx_info);
3347
3348         /* once tcp_info is set, no need to do it again */
3349         ctx_info->tcp_info_valid = false;
3350         ctx_info->iwarp_info_valid = false;
3351 }
3352
3353 /**
3354  * i40iw_cm_disconn - when a connection is being closed
3355  * @iwqp: associate qp for the connection
3356  */
3357 int i40iw_cm_disconn(struct i40iw_qp *iwqp)
3358 {
3359         struct disconn_work *work;
3360         struct i40iw_device *iwdev = iwqp->iwdev;
3361         struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3362
3363         work = kzalloc(sizeof(*work), GFP_ATOMIC);
3364         if (!work)
3365                 return -ENOMEM; /* Timer will clean up */
3366
3367         i40iw_add_ref(&iwqp->ibqp);
3368         work->iwqp = iwqp;
3369         INIT_WORK(&work->work, i40iw_disconnect_worker);
3370         queue_work(cm_core->disconn_wq, &work->work);
3371         return 0;
3372 }
3373
3374 /**
3375  * i40iw_loopback_nop - Send a nop
3376  * @qp: associated hw qp
3377  */
3378 static void i40iw_loopback_nop(struct i40iw_sc_qp *qp)
3379 {
3380         u64 *wqe;
3381         u64 header;
3382
3383         wqe = qp->qp_uk.sq_base->elem;
3384         set_64bit_val(wqe, 0, 0);
3385         set_64bit_val(wqe, 8, 0);
3386         set_64bit_val(wqe, 16, 0);
3387
3388         header = LS_64(I40IWQP_OP_NOP, I40IWQPSQ_OPCODE) |
3389             LS_64(0, I40IWQPSQ_SIGCOMPL) |
3390             LS_64(qp->qp_uk.swqe_polarity, I40IWQPSQ_VALID);
3391         set_64bit_val(wqe, 24, header);
3392 }
3393
3394 /**
3395  * i40iw_qp_disconnect - free qp and close cm
3396  * @iwqp: associate qp for the connection
3397  */
3398 static void i40iw_qp_disconnect(struct i40iw_qp *iwqp)
3399 {
3400         struct i40iw_device *iwdev;
3401         struct i40iw_ib_device *iwibdev;
3402
3403         iwdev = to_iwdev(iwqp->ibqp.device);
3404         if (!iwdev) {
3405                 i40iw_pr_err("iwdev == NULL\n");
3406                 return;
3407         }
3408
3409         iwibdev = iwdev->iwibdev;
3410
3411         if (iwqp->active_conn) {
3412                 /* indicate this connection is NOT active */
3413                 iwqp->active_conn = 0;
3414         } else {
3415                 /* Need to free the Last Streaming Mode Message */
3416                 if (iwqp->ietf_mem.va) {
3417                         if (iwqp->lsmm_mr)
3418                                 iwibdev->ibdev.dereg_mr(iwqp->lsmm_mr);
3419                         i40iw_free_dma_mem(iwdev->sc_dev.hw, &iwqp->ietf_mem);
3420                 }
3421         }
3422
3423         /* close the CM node down if it is still active */
3424         if (iwqp->cm_node) {
3425                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "%s Call close API\n", __func__);
3426                 i40iw_cm_close(iwqp->cm_node);
3427         }
3428 }
3429
3430 /**
3431  * i40iw_cm_disconn_true - called by worker thread to disconnect qp
3432  * @iwqp: associate qp for the connection
3433  */
3434 static void i40iw_cm_disconn_true(struct i40iw_qp *iwqp)
3435 {
3436         struct iw_cm_id *cm_id;
3437         struct i40iw_device *iwdev;
3438         struct i40iw_sc_qp *qp = &iwqp->sc_qp;
3439         u16 last_ae;
3440         u8 original_hw_tcp_state;
3441         u8 original_ibqp_state;
3442         int disconn_status = 0;
3443         int issue_disconn = 0;
3444         int issue_close = 0;
3445         int issue_flush = 0;
3446         struct ib_event ibevent;
3447         unsigned long flags;
3448         int ret;
3449
3450         if (!iwqp) {
3451                 i40iw_pr_err("iwqp == NULL\n");
3452                 return;
3453         }
3454
3455         spin_lock_irqsave(&iwqp->lock, flags);
3456         cm_id = iwqp->cm_id;
3457         /* make sure we havent already closed this connection */
3458         if (!cm_id) {
3459                 spin_unlock_irqrestore(&iwqp->lock, flags);
3460                 return;
3461         }
3462
3463         iwdev = to_iwdev(iwqp->ibqp.device);
3464
3465         original_hw_tcp_state = iwqp->hw_tcp_state;
3466         original_ibqp_state = iwqp->ibqp_state;
3467         last_ae = iwqp->last_aeq;
3468
3469         if (qp->term_flags) {
3470                 issue_disconn = 1;
3471                 issue_close = 1;
3472                 iwqp->cm_id = NULL;
3473                 /*When term timer expires after cm_timer, don't want
3474                  *terminate-handler to issue cm_disconn which can re-free
3475                  *a QP even after its refcnt=0.
3476                  */
3477                 del_timer(&iwqp->terminate_timer);
3478                 if (!iwqp->flush_issued) {
3479                         iwqp->flush_issued = 1;
3480                         issue_flush = 1;
3481                 }
3482         } else if ((original_hw_tcp_state == I40IW_TCP_STATE_CLOSE_WAIT) ||
3483                    ((original_ibqp_state == IB_QPS_RTS) &&
3484                     (last_ae == I40IW_AE_LLP_CONNECTION_RESET))) {
3485                 issue_disconn = 1;
3486                 if (last_ae == I40IW_AE_LLP_CONNECTION_RESET)
3487                         disconn_status = -ECONNRESET;
3488         }
3489
3490         if (((original_hw_tcp_state == I40IW_TCP_STATE_CLOSED) ||
3491              (original_hw_tcp_state == I40IW_TCP_STATE_TIME_WAIT) ||
3492              (last_ae == I40IW_AE_RDMAP_ROE_BAD_LLP_CLOSE) ||
3493              (last_ae == I40IW_AE_LLP_CONNECTION_RESET))) {
3494                 issue_close = 1;
3495                 iwqp->cm_id = NULL;
3496                 if (!iwqp->flush_issued) {
3497                         iwqp->flush_issued = 1;
3498                         issue_flush = 1;
3499                 }
3500         }
3501
3502         spin_unlock_irqrestore(&iwqp->lock, flags);
3503         if (issue_flush && !iwqp->destroyed) {
3504                 /* Flush the queues */
3505                 i40iw_flush_wqes(iwdev, iwqp);
3506
3507                 if (qp->term_flags) {
3508                         ibevent.device = iwqp->ibqp.device;
3509                         ibevent.event = (qp->eventtype == TERM_EVENT_QP_FATAL) ?
3510                                         IB_EVENT_QP_FATAL : IB_EVENT_QP_ACCESS_ERR;
3511                         ibevent.element.qp = &iwqp->ibqp;
3512                         iwqp->ibqp.event_handler(&ibevent, iwqp->ibqp.qp_context);
3513                 }
3514         }
3515
3516         if (cm_id && cm_id->event_handler) {
3517                 if (issue_disconn) {
3518                         ret = i40iw_send_cm_event(NULL,
3519                                                   cm_id,
3520                                                   IW_CM_EVENT_DISCONNECT,
3521                                                   disconn_status);
3522
3523                         if (ret)
3524                                 i40iw_debug(&iwdev->sc_dev,
3525                                             I40IW_DEBUG_CM,
3526                                             "disconnect event failed %s: - cm_id = %p\n",
3527                                             __func__, cm_id);
3528                 }
3529                 if (issue_close) {
3530                         i40iw_qp_disconnect(iwqp);
3531                         cm_id->provider_data = iwqp;
3532                         ret = i40iw_send_cm_event(NULL, cm_id, IW_CM_EVENT_CLOSE, 0);
3533                         if (ret)
3534                                 i40iw_debug(&iwdev->sc_dev,
3535                                             I40IW_DEBUG_CM,
3536                                             "close event failed %s: - cm_id = %p\n",
3537                                             __func__, cm_id);
3538                         cm_id->rem_ref(cm_id);
3539                 }
3540         }
3541 }
3542
3543 /**
3544  * i40iw_disconnect_worker - worker for connection close
3545  * @work: points or disconn structure
3546  */
3547 static void i40iw_disconnect_worker(struct work_struct *work)
3548 {
3549         struct disconn_work *dwork = container_of(work, struct disconn_work, work);
3550         struct i40iw_qp *iwqp = dwork->iwqp;
3551
3552         kfree(dwork);
3553         i40iw_cm_disconn_true(iwqp);
3554         i40iw_rem_ref(&iwqp->ibqp);
3555 }
3556
3557 /**
3558  * i40iw_accept - registered call for connection to be accepted
3559  * @cm_id: cm information for passive connection
3560  * @conn_param: accpet parameters
3561  */
3562 int i40iw_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3563 {
3564         struct ib_qp *ibqp;
3565         struct i40iw_qp *iwqp;
3566         struct i40iw_device *iwdev;
3567         struct i40iw_sc_dev *dev;
3568         struct i40iw_cm_node *cm_node;
3569         struct ib_qp_attr attr;
3570         int passive_state;
3571         struct i40iw_ib_device *iwibdev;
3572         struct ib_mr *ibmr;
3573         struct i40iw_pd *iwpd;
3574         u16 buf_len = 0;
3575         struct i40iw_kmem_info accept;
3576         enum i40iw_status_code status;
3577         u64 tagged_offset;
3578
3579         memset(&attr, 0, sizeof(attr));
3580         ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn);
3581         if (!ibqp)
3582                 return -EINVAL;
3583
3584         iwqp = to_iwqp(ibqp);
3585         iwdev = iwqp->iwdev;
3586         dev = &iwdev->sc_dev;
3587         cm_node = (struct i40iw_cm_node *)cm_id->provider_data;
3588
3589         if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) {
3590                 cm_node->ipv4 = true;
3591                 cm_node->vlan_id = i40iw_get_vlan_ipv4(cm_node->loc_addr);
3592         } else {
3593                 cm_node->ipv4 = false;
3594                 i40iw_netdev_vlan_ipv6(cm_node->loc_addr, &cm_node->vlan_id, NULL);
3595         }
3596         i40iw_debug(cm_node->dev,
3597                     I40IW_DEBUG_CM,
3598                     "Accept vlan_id=%d\n",
3599                     cm_node->vlan_id);
3600         if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
3601                 if (cm_node->loopbackpartner)
3602                         i40iw_rem_ref_cm_node(cm_node->loopbackpartner);
3603                 i40iw_rem_ref_cm_node(cm_node);
3604                 return -EINVAL;
3605         }
3606
3607         passive_state = atomic_add_return(1, &cm_node->passive_state);
3608         if (passive_state == I40IW_SEND_RESET_EVENT) {
3609                 i40iw_rem_ref_cm_node(cm_node);
3610                 return -ECONNRESET;
3611         }
3612
3613         cm_node->cm_core->stats_accepts++;
3614         iwqp->cm_node = (void *)cm_node;
3615         cm_node->iwqp = iwqp;
3616
3617         buf_len = conn_param->private_data_len + I40IW_MAX_IETF_SIZE + MPA_ZERO_PAD_LEN;
3618
3619         status = i40iw_allocate_dma_mem(dev->hw, &iwqp->ietf_mem, buf_len, 1);
3620
3621         if (status)
3622                 return -ENOMEM;
3623         cm_node->pdata.size = conn_param->private_data_len;
3624         accept.addr = iwqp->ietf_mem.va;
3625         accept.size = i40iw_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY);
3626         memcpy(accept.addr + accept.size, conn_param->private_data,
3627                conn_param->private_data_len);
3628
3629         /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3630         if ((cm_node->ipv4 &&
3631              !i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
3632             (!cm_node->ipv4 &&
3633              !i40iw_ipv6_is_loopback(cm_node->loc_addr, cm_node->rem_addr))) {
3634                 iwibdev = iwdev->iwibdev;
3635                 iwpd = iwqp->iwpd;
3636                 tagged_offset = (uintptr_t)iwqp->ietf_mem.va;
3637                 ibmr = i40iw_reg_phys_mr(&iwpd->ibpd,
3638                                          iwqp->ietf_mem.pa,
3639                                          buf_len,
3640                                          IB_ACCESS_LOCAL_WRITE,
3641                                          &tagged_offset);
3642                 if (IS_ERR(ibmr)) {
3643                         i40iw_free_dma_mem(dev->hw, &iwqp->ietf_mem);
3644                         return -ENOMEM;
3645                 }
3646
3647                 ibmr->pd = &iwpd->ibpd;
3648                 ibmr->device = iwpd->ibpd.device;
3649                 iwqp->lsmm_mr = ibmr;
3650                 if (iwqp->page)
3651                         iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
3652                 if (is_remote_ne020_or_chelsio(cm_node))
3653                         dev->iw_priv_qp_ops->qp_send_lsmm(
3654                                                         &iwqp->sc_qp,
3655                                                         iwqp->ietf_mem.va,
3656                                                         (accept.size + conn_param->private_data_len),
3657                                                         ibmr->lkey);
3658                 else
3659                         dev->iw_priv_qp_ops->qp_send_lsmm(
3660                                                         &iwqp->sc_qp,
3661                                                         iwqp->ietf_mem.va,
3662                                                         (accept.size + conn_param->private_data_len + MPA_ZERO_PAD_LEN),
3663                                                         ibmr->lkey);
3664
3665         } else {
3666                 if (iwqp->page)
3667                         iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
3668                 i40iw_loopback_nop(&iwqp->sc_qp);
3669         }
3670
3671         if (iwqp->page)
3672                 kunmap(iwqp->page);
3673
3674         iwqp->cm_id = cm_id;
3675         cm_node->cm_id = cm_id;
3676
3677         cm_id->provider_data = (void *)iwqp;
3678         iwqp->active_conn = 0;
3679
3680         cm_node->lsmm_size = accept.size + conn_param->private_data_len;
3681         i40iw_cm_init_tsa_conn(iwqp, cm_node);
3682         cm_id->add_ref(cm_id);
3683         i40iw_add_ref(&iwqp->ibqp);
3684
3685         i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0);
3686
3687         attr.qp_state = IB_QPS_RTS;
3688         cm_node->qhash_set = false;
3689         i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
3690         if (cm_node->loopbackpartner) {
3691                 cm_node->loopbackpartner->pdata.size = conn_param->private_data_len;
3692
3693                 /* copy entire MPA frame to our cm_node's frame */
3694                 memcpy(cm_node->loopbackpartner->pdata_buf,
3695                        conn_param->private_data,
3696                        conn_param->private_data_len);
3697                 i40iw_create_event(cm_node->loopbackpartner, I40IW_CM_EVENT_CONNECTED);
3698         }
3699
3700         cm_node->accelerated = 1;
3701         if (cm_node->accept_pend) {
3702                 if (!cm_node->listener)
3703                         i40iw_pr_err("cm_node->listener NULL for passive node\n");
3704                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
3705                 cm_node->accept_pend = 0;
3706         }
3707         return 0;
3708 }
3709
3710 /**
3711  * i40iw_reject - registered call for connection to be rejected
3712  * @cm_id: cm information for passive connection
3713  * @pdata: private data to be sent
3714  * @pdata_len: private data length
3715  */
3716 int i40iw_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3717 {
3718         struct i40iw_device *iwdev;
3719         struct i40iw_cm_node *cm_node;
3720         struct i40iw_cm_node *loopback;
3721
3722         cm_node = (struct i40iw_cm_node *)cm_id->provider_data;
3723         loopback = cm_node->loopbackpartner;
3724         cm_node->cm_id = cm_id;
3725         cm_node->pdata.size = pdata_len;
3726
3727         iwdev = to_iwdev(cm_id->device);
3728         if (!iwdev)
3729                 return -EINVAL;
3730         cm_node->cm_core->stats_rejects++;
3731
3732         if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER)
3733                 return -EINVAL;
3734
3735         if (loopback) {
3736                 memcpy(&loopback->pdata_buf, pdata, pdata_len);
3737                 loopback->pdata.size = pdata_len;
3738         }
3739
3740         return i40iw_cm_reject(cm_node, pdata, pdata_len);
3741 }
3742
3743 /**
3744  * i40iw_connect - registered call for connection to be established
3745  * @cm_id: cm information for passive connection
3746  * @conn_param: Information about the connection
3747  */
3748 int i40iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3749 {
3750         struct ib_qp *ibqp;
3751         struct i40iw_qp *iwqp;
3752         struct i40iw_device *iwdev;
3753         struct i40iw_cm_node *cm_node;
3754         struct i40iw_cm_info cm_info;
3755         struct sockaddr_in *laddr;
3756         struct sockaddr_in *raddr;
3757         struct sockaddr_in6 *laddr6;
3758         struct sockaddr_in6 *raddr6;
3759         int apbvt_set = 0;
3760         enum i40iw_status_code status;
3761
3762         ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn);
3763         if (!ibqp)
3764                 return -EINVAL;
3765         iwqp = to_iwqp(ibqp);
3766         if (!iwqp)
3767                 return -EINVAL;
3768         iwdev = to_iwdev(iwqp->ibqp.device);
3769         if (!iwdev)
3770                 return -EINVAL;
3771
3772         laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3773         raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
3774         laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3775         raddr6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr;
3776
3777         if (!(laddr->sin_port) || !(raddr->sin_port))
3778                 return -EINVAL;
3779
3780         iwqp->active_conn = 1;
3781         iwqp->cm_id = NULL;
3782         cm_id->provider_data = iwqp;
3783
3784         /* set up the connection params for the node */
3785         if (cm_id->remote_addr.ss_family == AF_INET) {
3786                 cm_info.ipv4 = true;
3787                 memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr));
3788                 memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr));
3789                 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3790                 cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr);
3791                 cm_info.loc_port = ntohs(laddr->sin_port);
3792                 cm_info.rem_port = ntohs(raddr->sin_port);
3793                 cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr);
3794         } else {
3795                 cm_info.ipv4 = false;
3796                 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3797                                     laddr6->sin6_addr.in6_u.u6_addr32);
3798                 i40iw_copy_ip_ntohl(cm_info.rem_addr,
3799                                     raddr6->sin6_addr.in6_u.u6_addr32);
3800                 cm_info.loc_port = ntohs(laddr6->sin6_port);
3801                 cm_info.rem_port = ntohs(raddr6->sin6_port);
3802                 i40iw_netdev_vlan_ipv6(cm_info.loc_addr, &cm_info.vlan_id, NULL);
3803         }
3804         cm_info.cm_id = cm_id;
3805         if ((cm_info.ipv4 && (laddr->sin_addr.s_addr != raddr->sin_addr.s_addr)) ||
3806             (!cm_info.ipv4 && memcmp(laddr6->sin6_addr.in6_u.u6_addr32,
3807                                      raddr6->sin6_addr.in6_u.u6_addr32,
3808                                      sizeof(laddr6->sin6_addr.in6_u.u6_addr32)))) {
3809                 status = i40iw_manage_qhash(iwdev,
3810                                             &cm_info,
3811                                             I40IW_QHASH_TYPE_TCP_ESTABLISHED,
3812                                             I40IW_QHASH_MANAGE_TYPE_ADD,
3813                                             NULL,
3814                                             true);
3815                 if (status)
3816                         return -EINVAL;
3817         }
3818         status = i40iw_manage_apbvt(iwdev, cm_info.loc_port, I40IW_MANAGE_APBVT_ADD);
3819         if (status) {
3820                 i40iw_manage_qhash(iwdev,
3821                                    &cm_info,
3822                                    I40IW_QHASH_TYPE_TCP_ESTABLISHED,
3823                                    I40IW_QHASH_MANAGE_TYPE_DELETE,
3824                                    NULL,
3825                                    false);
3826                 return -EINVAL;
3827         }
3828
3829         apbvt_set = 1;
3830         cm_id->add_ref(cm_id);
3831         cm_node = i40iw_create_cm_node(&iwdev->cm_core, iwdev,
3832                                        conn_param->private_data_len,
3833                                        (void *)conn_param->private_data,
3834                                        &cm_info);
3835         if (!cm_node) {
3836                 i40iw_manage_qhash(iwdev,
3837                                    &cm_info,
3838                                    I40IW_QHASH_TYPE_TCP_ESTABLISHED,
3839                                    I40IW_QHASH_MANAGE_TYPE_DELETE,
3840                                    NULL,
3841                                    false);
3842
3843                 if (apbvt_set && !i40iw_listen_port_in_use(&iwdev->cm_core,
3844                                                            cm_info.loc_port))
3845                         i40iw_manage_apbvt(iwdev,
3846                                            cm_info.loc_port,
3847                                            I40IW_MANAGE_APBVT_DEL);
3848                 cm_id->rem_ref(cm_id);
3849                 iwdev->cm_core.stats_connect_errs++;
3850                 return -ENOMEM;
3851         }
3852
3853         i40iw_record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord);
3854         if (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO &&
3855             !cm_node->ord_size)
3856                 cm_node->ord_size = 1;
3857
3858         cm_node->apbvt_set = apbvt_set;
3859         cm_node->qhash_set = true;
3860         iwqp->cm_node = cm_node;
3861         cm_node->iwqp = iwqp;
3862         iwqp->cm_id = cm_id;
3863         i40iw_add_ref(&iwqp->ibqp);
3864         return 0;
3865 }
3866
3867 /**
3868  * i40iw_create_listen - registered call creating listener
3869  * @cm_id: cm information for passive connection
3870  * @backlog: to max accept pending count
3871  */
3872 int i40iw_create_listen(struct iw_cm_id *cm_id, int backlog)
3873 {
3874         struct i40iw_device *iwdev;
3875         struct i40iw_cm_listener *cm_listen_node;
3876         struct i40iw_cm_info cm_info;
3877         enum i40iw_status_code ret;
3878         struct sockaddr_in *laddr;
3879         struct sockaddr_in6 *laddr6;
3880         bool wildcard = false;
3881
3882         iwdev = to_iwdev(cm_id->device);
3883         if (!iwdev)
3884                 return -EINVAL;
3885
3886         laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3887         laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3888         memset(&cm_info, 0, sizeof(cm_info));
3889         if (laddr->sin_family == AF_INET) {
3890                 cm_info.ipv4 = true;
3891                 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3892                 cm_info.loc_port = ntohs(laddr->sin_port);
3893
3894                 if (laddr->sin_addr.s_addr != INADDR_ANY)
3895                         cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr);
3896                 else
3897                         wildcard = true;
3898
3899         } else {
3900                 cm_info.ipv4 = false;
3901                 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3902                                     laddr6->sin6_addr.in6_u.u6_addr32);
3903                 cm_info.loc_port = ntohs(laddr6->sin6_port);
3904                 if (ipv6_addr_type(&laddr6->sin6_addr) != IPV6_ADDR_ANY)
3905                         i40iw_netdev_vlan_ipv6(cm_info.loc_addr,
3906                                                &cm_info.vlan_id,
3907                                                NULL);
3908                 else
3909                         wildcard = true;
3910         }
3911         cm_info.backlog = backlog;
3912         cm_info.cm_id = cm_id;
3913
3914         cm_listen_node = i40iw_make_listen_node(&iwdev->cm_core, iwdev, &cm_info);
3915         if (!cm_listen_node) {
3916                 i40iw_pr_err("cm_listen_node == NULL\n");
3917                 return -ENOMEM;
3918         }
3919
3920         cm_id->provider_data = cm_listen_node;
3921
3922         if (!cm_listen_node->reused_node) {
3923                 if (wildcard) {
3924                         if (cm_info.ipv4)
3925                                 ret = i40iw_add_mqh_4(iwdev,
3926                                                       &cm_info,
3927                                                       cm_listen_node);
3928                         else
3929                                 ret = i40iw_add_mqh_6(iwdev,
3930                                                       &cm_info,
3931                                                       cm_listen_node);
3932                         if (ret)
3933                                 goto error;
3934
3935                         ret = i40iw_manage_apbvt(iwdev,
3936                                                  cm_info.loc_port,
3937                                                  I40IW_MANAGE_APBVT_ADD);
3938
3939                         if (ret)
3940                                 goto error;
3941                 } else {
3942                         ret = i40iw_manage_qhash(iwdev,
3943                                                  &cm_info,
3944                                                  I40IW_QHASH_TYPE_TCP_SYN,
3945                                                  I40IW_QHASH_MANAGE_TYPE_ADD,
3946                                                  NULL,
3947                                                  true);
3948                         if (ret)
3949                                 goto error;
3950                         cm_listen_node->qhash_set = true;
3951                         ret = i40iw_manage_apbvt(iwdev,
3952                                                  cm_info.loc_port,
3953                                                  I40IW_MANAGE_APBVT_ADD);
3954                         if (ret)
3955                                 goto error;
3956                 }
3957         }
3958         cm_id->add_ref(cm_id);
3959         cm_listen_node->cm_core->stats_listen_created++;
3960         return 0;
3961  error:
3962         i40iw_cm_del_listen(&iwdev->cm_core, (void *)cm_listen_node, false);
3963         return -EINVAL;
3964 }
3965
3966 /**
3967  * i40iw_destroy_listen - registered call to destroy listener
3968  * @cm_id: cm information for passive connection
3969  */
3970 int i40iw_destroy_listen(struct iw_cm_id *cm_id)
3971 {
3972         struct i40iw_device *iwdev;
3973
3974         iwdev = to_iwdev(cm_id->device);
3975         if (cm_id->provider_data)
3976                 i40iw_cm_del_listen(&iwdev->cm_core, cm_id->provider_data, true);
3977         else
3978                 i40iw_pr_err("cm_id->provider_data was NULL\n");
3979
3980         cm_id->rem_ref(cm_id);
3981
3982         return 0;
3983 }
3984
3985 /**
3986  * i40iw_cm_event_connected - handle connected active node
3987  * @event: the info for cm_node of connection
3988  */
3989 static void i40iw_cm_event_connected(struct i40iw_cm_event *event)
3990 {
3991         struct i40iw_qp *iwqp;
3992         struct i40iw_device *iwdev;
3993         struct i40iw_cm_node *cm_node;
3994         struct i40iw_sc_dev *dev;
3995         struct ib_qp_attr attr;
3996         struct iw_cm_id *cm_id;
3997         int status;
3998         bool read0;
3999
4000         cm_node = event->cm_node;
4001         cm_id = cm_node->cm_id;
4002         iwqp = (struct i40iw_qp *)cm_id->provider_data;
4003         iwdev = to_iwdev(iwqp->ibqp.device);
4004         dev = &iwdev->sc_dev;
4005
4006         if (iwqp->destroyed) {
4007                 status = -ETIMEDOUT;
4008                 goto error;
4009         }
4010         i40iw_cm_init_tsa_conn(iwqp, cm_node);
4011         read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO);
4012         if (iwqp->page)
4013                 iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
4014         dev->iw_priv_qp_ops->qp_send_rtt(&iwqp->sc_qp, read0);
4015         if (iwqp->page)
4016                 kunmap(iwqp->page);
4017         status = i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 0);
4018         if (status)
4019                 i40iw_pr_err("send cm event\n");
4020
4021         memset(&attr, 0, sizeof(attr));
4022         attr.qp_state = IB_QPS_RTS;
4023         cm_node->qhash_set = false;
4024         i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
4025
4026         cm_node->accelerated = 1;
4027         if (cm_node->accept_pend) {
4028                 if (!cm_node->listener)
4029                         i40iw_pr_err("listener is null for passive node\n");
4030                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
4031                 cm_node->accept_pend = 0;
4032         }
4033         return;
4034
4035 error:
4036         iwqp->cm_id = NULL;
4037         cm_id->provider_data = NULL;
4038         i40iw_send_cm_event(event->cm_node,
4039                             cm_id,
4040                             IW_CM_EVENT_CONNECT_REPLY,
4041                             status);
4042         cm_id->rem_ref(cm_id);
4043         i40iw_rem_ref_cm_node(event->cm_node);
4044 }
4045
4046 /**
4047  * i40iw_cm_event_reset - handle reset
4048  * @event: the info for cm_node of connection
4049  */
4050 static void i40iw_cm_event_reset(struct i40iw_cm_event *event)
4051 {
4052         struct i40iw_cm_node *cm_node = event->cm_node;
4053         struct iw_cm_id   *cm_id = cm_node->cm_id;
4054         struct i40iw_qp *iwqp;
4055
4056         if (!cm_id)
4057                 return;
4058
4059         iwqp = cm_id->provider_data;
4060         if (!iwqp)
4061                 return;
4062
4063         i40iw_debug(cm_node->dev,
4064                     I40IW_DEBUG_CM,
4065                     "reset event %p - cm_id = %p\n",
4066                      event->cm_node, cm_id);
4067         iwqp->cm_id = NULL;
4068
4069         i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT, -ECONNRESET);
4070         i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0);
4071 }
4072
4073 /**
4074  * i40iw_cm_event_handler - worker thread callback to send event to cm upper layer
4075  * @work: pointer of cm event info.
4076  */
4077 static void i40iw_cm_event_handler(struct work_struct *work)
4078 {
4079         struct i40iw_cm_event *event = container_of(work,
4080                                                     struct i40iw_cm_event,
4081                                                     event_work);
4082         struct i40iw_cm_node *cm_node;
4083
4084         if (!event || !event->cm_node || !event->cm_node->cm_core)
4085                 return;
4086
4087         cm_node = event->cm_node;
4088
4089         switch (event->type) {
4090         case I40IW_CM_EVENT_MPA_REQ:
4091                 i40iw_send_cm_event(cm_node,
4092                                     cm_node->cm_id,
4093                                     IW_CM_EVENT_CONNECT_REQUEST,
4094                                     0);
4095                 break;
4096         case I40IW_CM_EVENT_RESET:
4097                 i40iw_cm_event_reset(event);
4098                 break;
4099         case I40IW_CM_EVENT_CONNECTED:
4100                 if (!event->cm_node->cm_id ||
4101                     (event->cm_node->state != I40IW_CM_STATE_OFFLOADED))
4102                         break;
4103                 i40iw_cm_event_connected(event);
4104                 break;
4105         case I40IW_CM_EVENT_MPA_REJECT:
4106                 if (!event->cm_node->cm_id ||
4107                     (cm_node->state == I40IW_CM_STATE_OFFLOADED))
4108                         break;
4109                 i40iw_send_cm_event(cm_node,
4110                                     cm_node->cm_id,
4111                                     IW_CM_EVENT_CONNECT_REPLY,
4112                                     -ECONNREFUSED);
4113                 break;
4114         case I40IW_CM_EVENT_ABORTED:
4115                 if (!event->cm_node->cm_id ||
4116                     (event->cm_node->state == I40IW_CM_STATE_OFFLOADED))
4117                         break;
4118                 i40iw_event_connect_error(event);
4119                 break;
4120         default:
4121                 i40iw_pr_err("event type = %d\n", event->type);
4122                 break;
4123         }
4124
4125         event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
4126         i40iw_rem_ref_cm_node(event->cm_node);
4127         kfree(event);
4128 }
4129
4130 /**
4131  * i40iw_cm_post_event - queue event request for worker thread
4132  * @event: cm node's info for up event call
4133  */
4134 static void i40iw_cm_post_event(struct i40iw_cm_event *event)
4135 {
4136         atomic_inc(&event->cm_node->ref_count);
4137         event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
4138         INIT_WORK(&event->event_work, i40iw_cm_event_handler);
4139
4140         queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
4141 }