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 static struct dst_entry *i40iw_get_dst_ipv6(struct sockaddr_in6 *src_addr,
1996                                             struct sockaddr_in6 *dst_addr)
1997 {
1998         struct dst_entry *dst;
1999         struct flowi6 fl6;
2000
2001         memset(&fl6, 0, sizeof(fl6));
2002         fl6.daddr = dst_addr->sin6_addr;
2003         fl6.saddr = src_addr->sin6_addr;
2004         if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
2005                 fl6.flowi6_oif = dst_addr->sin6_scope_id;
2006
2007         dst = ip6_route_output(&init_net, NULL, &fl6);
2008         return dst;
2009 }
2010
2011 /**
2012  * i40iw_addr_resolve_neigh_ipv6 - resolve neighbor ipv6 address
2013  * @iwdev: iwarp device structure
2014  * @dst_ip: remote ip address
2015  * @arpindex: if there is an arp entry
2016  */
2017 static int i40iw_addr_resolve_neigh_ipv6(struct i40iw_device *iwdev,
2018                                          u32 *src,
2019                                          u32 *dest,
2020                                          int arpindex)
2021 {
2022         struct neighbour *neigh;
2023         int rc = arpindex;
2024         struct net_device *netdev = iwdev->netdev;
2025         struct dst_entry *dst;
2026         struct sockaddr_in6 dst_addr;
2027         struct sockaddr_in6 src_addr;
2028
2029         memset(&dst_addr, 0, sizeof(dst_addr));
2030         dst_addr.sin6_family = AF_INET6;
2031         i40iw_copy_ip_htonl(dst_addr.sin6_addr.in6_u.u6_addr32, dest);
2032         memset(&src_addr, 0, sizeof(src_addr));
2033         src_addr.sin6_family = AF_INET6;
2034         i40iw_copy_ip_htonl(src_addr.sin6_addr.in6_u.u6_addr32, src);
2035         dst = i40iw_get_dst_ipv6(&src_addr, &dst_addr);
2036         if (!dst || dst->error) {
2037                 if (dst) {
2038                         dst_release(dst);
2039                         i40iw_pr_err("ip6_route_output returned dst->error = %d\n",
2040                                      dst->error);
2041                 }
2042                 return rc;
2043         }
2044
2045         if (netif_is_bond_slave(netdev))
2046                 netdev = netdev_master_upper_dev_get(netdev);
2047
2048         neigh = dst_neigh_lookup(dst, &dst_addr);
2049
2050         rcu_read_lock();
2051         if (neigh) {
2052                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "dst_neigh_lookup MAC=%pM\n", neigh->ha);
2053                 if (neigh->nud_state & NUD_VALID) {
2054                         if (arpindex >= 0) {
2055                                 if (ether_addr_equal
2056                                     (iwdev->arp_table[arpindex].mac_addr,
2057                                      neigh->ha)) {
2058                                         /* Mac address same as in arp table */
2059                                         goto resolve_neigh_exit6;
2060                                 }
2061                                 i40iw_manage_arp_cache(iwdev,
2062                                                        iwdev->arp_table[arpindex].mac_addr,
2063                                                        dest,
2064                                                        false,
2065                                                        I40IW_ARP_DELETE);
2066                         }
2067                         i40iw_manage_arp_cache(iwdev,
2068                                                neigh->ha,
2069                                                dest,
2070                                                false,
2071                                                I40IW_ARP_ADD);
2072                         rc = i40iw_arp_table(iwdev,
2073                                              dest,
2074                                              false,
2075                                              NULL,
2076                                              I40IW_ARP_RESOLVE);
2077                 } else {
2078                         neigh_event_send(neigh, NULL);
2079                 }
2080         }
2081
2082  resolve_neigh_exit6:
2083         rcu_read_unlock();
2084         if (neigh)
2085                 neigh_release(neigh);
2086         dst_release(dst);
2087         return rc;
2088 }
2089
2090 /**
2091  * i40iw_ipv4_is_loopback - check if loopback
2092  * @loc_addr: local addr to compare
2093  * @rem_addr: remote address
2094  */
2095 static bool i40iw_ipv4_is_loopback(u32 loc_addr, u32 rem_addr)
2096 {
2097         return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr);
2098 }
2099
2100 /**
2101  * i40iw_ipv6_is_loopback - check if loopback
2102  * @loc_addr: local addr to compare
2103  * @rem_addr: remote address
2104  */
2105 static bool i40iw_ipv6_is_loopback(u32 *loc_addr, u32 *rem_addr)
2106 {
2107         struct in6_addr raddr6;
2108
2109         i40iw_copy_ip_htonl(raddr6.in6_u.u6_addr32, rem_addr);
2110         return (!memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6));
2111 }
2112
2113 /**
2114  * i40iw_make_cm_node - create a new instance of a cm node
2115  * @cm_core: cm's core
2116  * @iwdev: iwarp device structure
2117  * @cm_info: quad info for connection
2118  * @listener: passive connection's listener
2119  */
2120 static struct i40iw_cm_node *i40iw_make_cm_node(
2121                                    struct i40iw_cm_core *cm_core,
2122                                    struct i40iw_device *iwdev,
2123                                    struct i40iw_cm_info *cm_info,
2124                                    struct i40iw_cm_listener *listener)
2125 {
2126         struct i40iw_cm_node *cm_node;
2127         struct timespec ts;
2128         int oldarpindex;
2129         int arpindex;
2130         struct net_device *netdev = iwdev->netdev;
2131
2132         /* create an hte and cm_node for this instance */
2133         cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
2134         if (!cm_node)
2135                 return NULL;
2136
2137         /* set our node specific transport info */
2138         cm_node->ipv4 = cm_info->ipv4;
2139         cm_node->vlan_id = cm_info->vlan_id;
2140         memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr));
2141         memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr));
2142         cm_node->loc_port = cm_info->loc_port;
2143         cm_node->rem_port = cm_info->rem_port;
2144
2145         cm_node->mpa_frame_rev = iwdev->mpa_version;
2146         cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
2147         cm_node->ird_size = I40IW_MAX_IRD_SIZE;
2148         cm_node->ord_size = I40IW_MAX_ORD_SIZE;
2149
2150         cm_node->listener = listener;
2151         cm_node->cm_id = cm_info->cm_id;
2152         ether_addr_copy(cm_node->loc_mac, netdev->dev_addr);
2153         spin_lock_init(&cm_node->retrans_list_lock);
2154
2155         atomic_set(&cm_node->ref_count, 1);
2156         /* associate our parent CM core */
2157         cm_node->cm_core = cm_core;
2158         cm_node->tcp_cntxt.loc_id = I40IW_CM_DEF_LOCAL_ID;
2159         cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE;
2160         cm_node->tcp_cntxt.rcv_wnd =
2161                         I40IW_CM_DEFAULT_RCV_WND_SCALED >> I40IW_CM_DEFAULT_RCV_WND_SCALE;
2162         ts = current_kernel_time();
2163         cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
2164         cm_node->tcp_cntxt.mss = iwdev->mss;
2165
2166         cm_node->iwdev = iwdev;
2167         cm_node->dev = &iwdev->sc_dev;
2168
2169         if ((cm_node->ipv4 &&
2170              i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
2171              (!cm_node->ipv4 && i40iw_ipv6_is_loopback(cm_node->loc_addr,
2172                                                        cm_node->rem_addr))) {
2173                 arpindex = i40iw_arp_table(iwdev,
2174                                            cm_node->rem_addr,
2175                                            false,
2176                                            NULL,
2177                                            I40IW_ARP_RESOLVE);
2178         } else {
2179                 oldarpindex = i40iw_arp_table(iwdev,
2180                                               cm_node->rem_addr,
2181                                               false,
2182                                               NULL,
2183                                               I40IW_ARP_RESOLVE);
2184                 if (cm_node->ipv4)
2185                         arpindex = i40iw_addr_resolve_neigh(iwdev,
2186                                                             cm_info->loc_addr[0],
2187                                                             cm_info->rem_addr[0],
2188                                                             oldarpindex);
2189                 else if (IS_ENABLED(CONFIG_IPV6))
2190                         arpindex = i40iw_addr_resolve_neigh_ipv6(iwdev,
2191                                                                  cm_info->loc_addr,
2192                                                                  cm_info->rem_addr,
2193                                                                  oldarpindex);
2194                 else
2195                         arpindex = -EINVAL;
2196         }
2197         if (arpindex < 0) {
2198                 i40iw_pr_err("cm_node arpindex\n");
2199                 kfree(cm_node);
2200                 return NULL;
2201         }
2202         ether_addr_copy(cm_node->rem_mac, iwdev->arp_table[arpindex].mac_addr);
2203         i40iw_add_hte_node(cm_core, cm_node);
2204         cm_core->stats_nodes_created++;
2205         return cm_node;
2206 }
2207
2208 /**
2209  * i40iw_rem_ref_cm_node - destroy an instance of a cm node
2210  * @cm_node: connection's node
2211  */
2212 static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *cm_node)
2213 {
2214         struct i40iw_cm_core *cm_core = cm_node->cm_core;
2215         struct i40iw_qp *iwqp;
2216         struct i40iw_cm_info nfo;
2217         unsigned long flags;
2218
2219         spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
2220         if (atomic_dec_return(&cm_node->ref_count)) {
2221                 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
2222                 return;
2223         }
2224         list_del(&cm_node->list);
2225         spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
2226
2227         /* if the node is destroyed before connection was accelerated */
2228         if (!cm_node->accelerated && cm_node->accept_pend) {
2229                 pr_err("node destroyed before established\n");
2230                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
2231         }
2232         if (cm_node->close_entry)
2233                 i40iw_handle_close_entry(cm_node, 0);
2234         if (cm_node->listener) {
2235                 i40iw_dec_refcnt_listen(cm_core, cm_node->listener, 0, true);
2236         } else {
2237                 if (!i40iw_listen_port_in_use(cm_core, htons(cm_node->loc_port)) &&
2238                     cm_node->apbvt_set && cm_node->iwdev) {
2239                         i40iw_manage_apbvt(cm_node->iwdev,
2240                                            cm_node->loc_port,
2241                                            I40IW_MANAGE_APBVT_DEL);
2242                         i40iw_get_addr_info(cm_node, &nfo);
2243                         if (cm_node->qhash_set) {
2244                                 i40iw_manage_qhash(cm_node->iwdev,
2245                                                    &nfo,
2246                                                    I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2247                                                    I40IW_QHASH_MANAGE_TYPE_DELETE,
2248                                                    NULL,
2249                                                    false);
2250                                 cm_node->qhash_set = 0;
2251                         }
2252                 }
2253         }
2254
2255         iwqp = cm_node->iwqp;
2256         if (iwqp) {
2257                 iwqp->cm_node = NULL;
2258                 i40iw_rem_ref(&iwqp->ibqp);
2259                 cm_node->iwqp = NULL;
2260         } else if (cm_node->qhash_set) {
2261                 i40iw_get_addr_info(cm_node, &nfo);
2262                 i40iw_manage_qhash(cm_node->iwdev,
2263                                    &nfo,
2264                                    I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2265                                    I40IW_QHASH_MANAGE_TYPE_DELETE,
2266                                    NULL,
2267                                    false);
2268                 cm_node->qhash_set = 0;
2269         }
2270
2271         cm_node->cm_core->stats_nodes_destroyed++;
2272         kfree(cm_node);
2273 }
2274
2275 /**
2276  * i40iw_handle_fin_pkt - FIN packet received
2277  * @cm_node: connection's node
2278  */
2279 static void i40iw_handle_fin_pkt(struct i40iw_cm_node *cm_node)
2280 {
2281         u32 ret;
2282
2283         switch (cm_node->state) {
2284         case I40IW_CM_STATE_SYN_RCVD:
2285         case I40IW_CM_STATE_SYN_SENT:
2286         case I40IW_CM_STATE_ESTABLISHED:
2287         case I40IW_CM_STATE_MPAREJ_RCVD:
2288                 cm_node->tcp_cntxt.rcv_nxt++;
2289                 i40iw_cleanup_retrans_entry(cm_node);
2290                 cm_node->state = I40IW_CM_STATE_LAST_ACK;
2291                 i40iw_send_fin(cm_node);
2292                 break;
2293         case I40IW_CM_STATE_MPAREQ_SENT:
2294                 i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
2295                 cm_node->tcp_cntxt.rcv_nxt++;
2296                 i40iw_cleanup_retrans_entry(cm_node);
2297                 cm_node->state = I40IW_CM_STATE_CLOSED;
2298                 atomic_inc(&cm_node->ref_count);
2299                 i40iw_send_reset(cm_node);
2300                 break;
2301         case I40IW_CM_STATE_FIN_WAIT1:
2302                 cm_node->tcp_cntxt.rcv_nxt++;
2303                 i40iw_cleanup_retrans_entry(cm_node);
2304                 cm_node->state = I40IW_CM_STATE_CLOSING;
2305                 i40iw_send_ack(cm_node);
2306                 /*
2307                  * Wait for ACK as this is simultaneous close.
2308                  * After we receive ACK, do not send anything.
2309                  * Just rm the node.
2310                  */
2311                 break;
2312         case I40IW_CM_STATE_FIN_WAIT2:
2313                 cm_node->tcp_cntxt.rcv_nxt++;
2314                 i40iw_cleanup_retrans_entry(cm_node);
2315                 cm_node->state = I40IW_CM_STATE_TIME_WAIT;
2316                 i40iw_send_ack(cm_node);
2317                 ret =
2318                     i40iw_schedule_cm_timer(cm_node, NULL, I40IW_TIMER_TYPE_CLOSE, 1, 0);
2319                 if (ret)
2320                         i40iw_pr_err("node %p state = %d\n", cm_node, cm_node->state);
2321                 break;
2322         case I40IW_CM_STATE_TIME_WAIT:
2323                 cm_node->tcp_cntxt.rcv_nxt++;
2324                 i40iw_cleanup_retrans_entry(cm_node);
2325                 cm_node->state = I40IW_CM_STATE_CLOSED;
2326                 i40iw_rem_ref_cm_node(cm_node);
2327                 break;
2328         case I40IW_CM_STATE_OFFLOADED:
2329         default:
2330                 i40iw_pr_err("bad state node %p state = %d\n", cm_node, cm_node->state);
2331                 break;
2332         }
2333 }
2334
2335 /**
2336  * i40iw_handle_rst_pkt - process received RST packet
2337  * @cm_node: connection's node
2338  * @rbuf: receive buffer
2339  */
2340 static void i40iw_handle_rst_pkt(struct i40iw_cm_node *cm_node,
2341                                  struct i40iw_puda_buf *rbuf)
2342 {
2343         i40iw_cleanup_retrans_entry(cm_node);
2344         switch (cm_node->state) {
2345         case I40IW_CM_STATE_SYN_SENT:
2346         case I40IW_CM_STATE_MPAREQ_SENT:
2347                 switch (cm_node->mpa_frame_rev) {
2348                 case IETF_MPA_V2:
2349                         cm_node->mpa_frame_rev = IETF_MPA_V1;
2350                         /* send a syn and goto syn sent state */
2351                         cm_node->state = I40IW_CM_STATE_SYN_SENT;
2352                         if (i40iw_send_syn(cm_node, 0))
2353                                 i40iw_active_open_err(cm_node, false);
2354                         break;
2355                 case IETF_MPA_V1:
2356                 default:
2357                         i40iw_active_open_err(cm_node, false);
2358                         break;
2359                 }
2360                 break;
2361         case I40IW_CM_STATE_MPAREQ_RCVD:
2362                 atomic_add_return(1, &cm_node->passive_state);
2363                 break;
2364         case I40IW_CM_STATE_ESTABLISHED:
2365         case I40IW_CM_STATE_SYN_RCVD:
2366         case I40IW_CM_STATE_LISTENING:
2367                 i40iw_pr_err("Bad state state = %d\n", cm_node->state);
2368                 i40iw_passive_open_err(cm_node, false);
2369                 break;
2370         case I40IW_CM_STATE_OFFLOADED:
2371                 i40iw_active_open_err(cm_node, false);
2372                 break;
2373         case I40IW_CM_STATE_CLOSED:
2374                 break;
2375         case I40IW_CM_STATE_FIN_WAIT2:
2376         case I40IW_CM_STATE_FIN_WAIT1:
2377         case I40IW_CM_STATE_LAST_ACK:
2378                 cm_node->cm_id->rem_ref(cm_node->cm_id);
2379         case I40IW_CM_STATE_TIME_WAIT:
2380                 cm_node->state = I40IW_CM_STATE_CLOSED;
2381                 i40iw_rem_ref_cm_node(cm_node);
2382                 break;
2383         default:
2384                 break;
2385         }
2386 }
2387
2388 /**
2389  * i40iw_handle_rcv_mpa - Process a recv'd mpa buffer
2390  * @cm_node: connection's node
2391  * @rbuf: receive buffer
2392  */
2393 static void i40iw_handle_rcv_mpa(struct i40iw_cm_node *cm_node,
2394                                  struct i40iw_puda_buf *rbuf)
2395 {
2396         int ret;
2397         int datasize = rbuf->datalen;
2398         u8 *dataloc = rbuf->data;
2399
2400         enum i40iw_cm_event_type type = I40IW_CM_EVENT_UNKNOWN;
2401         u32 res_type;
2402
2403         ret = i40iw_parse_mpa(cm_node, dataloc, &res_type, datasize);
2404         if (ret) {
2405                 if (cm_node->state == I40IW_CM_STATE_MPAREQ_SENT)
2406                         i40iw_active_open_err(cm_node, true);
2407                 else
2408                         i40iw_passive_open_err(cm_node, true);
2409                 return;
2410         }
2411
2412         switch (cm_node->state) {
2413         case I40IW_CM_STATE_ESTABLISHED:
2414                 if (res_type == I40IW_MPA_REQUEST_REJECT)
2415                         i40iw_pr_err("state for reject\n");
2416                 cm_node->state = I40IW_CM_STATE_MPAREQ_RCVD;
2417                 type = I40IW_CM_EVENT_MPA_REQ;
2418                 i40iw_send_ack(cm_node);        /* ACK received MPA request */
2419                 atomic_set(&cm_node->passive_state,
2420                            I40IW_PASSIVE_STATE_INDICATED);
2421                 break;
2422         case I40IW_CM_STATE_MPAREQ_SENT:
2423                 i40iw_cleanup_retrans_entry(cm_node);
2424                 if (res_type == I40IW_MPA_REQUEST_REJECT) {
2425                         type = I40IW_CM_EVENT_MPA_REJECT;
2426                         cm_node->state = I40IW_CM_STATE_MPAREJ_RCVD;
2427                 } else {
2428                         type = I40IW_CM_EVENT_CONNECTED;
2429                         cm_node->state = I40IW_CM_STATE_OFFLOADED;
2430                         i40iw_send_ack(cm_node);
2431                 }
2432                 break;
2433         default:
2434                 pr_err("%s wrong cm_node state =%d\n", __func__, cm_node->state);
2435                 break;
2436         }
2437         i40iw_create_event(cm_node, type);
2438 }
2439
2440 /**
2441  * i40iw_indicate_pkt_err - Send up err event to cm
2442  * @cm_node: connection's node
2443  */
2444 static void i40iw_indicate_pkt_err(struct i40iw_cm_node *cm_node)
2445 {
2446         switch (cm_node->state) {
2447         case I40IW_CM_STATE_SYN_SENT:
2448         case I40IW_CM_STATE_MPAREQ_SENT:
2449                 i40iw_active_open_err(cm_node, true);
2450                 break;
2451         case I40IW_CM_STATE_ESTABLISHED:
2452         case I40IW_CM_STATE_SYN_RCVD:
2453                 i40iw_passive_open_err(cm_node, true);
2454                 break;
2455         case I40IW_CM_STATE_OFFLOADED:
2456         default:
2457                 break;
2458         }
2459 }
2460
2461 /**
2462  * i40iw_check_syn - Check for error on received syn ack
2463  * @cm_node: connection's node
2464  * @tcph: pointer tcp header
2465  */
2466 static int i40iw_check_syn(struct i40iw_cm_node *cm_node, struct tcphdr *tcph)
2467 {
2468         int err = 0;
2469
2470         if (ntohl(tcph->ack_seq) != cm_node->tcp_cntxt.loc_seq_num) {
2471                 err = 1;
2472                 i40iw_active_open_err(cm_node, true);
2473         }
2474         return err;
2475 }
2476
2477 /**
2478  * i40iw_check_seq - check seq numbers if OK
2479  * @cm_node: connection's node
2480  * @tcph: pointer tcp header
2481  */
2482 static int i40iw_check_seq(struct i40iw_cm_node *cm_node, struct tcphdr *tcph)
2483 {
2484         int err = 0;
2485         u32 seq;
2486         u32 ack_seq;
2487         u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
2488         u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
2489         u32 rcv_wnd;
2490
2491         seq = ntohl(tcph->seq);
2492         ack_seq = ntohl(tcph->ack_seq);
2493         rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
2494         if (ack_seq != loc_seq_num)
2495                 err = -1;
2496         else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
2497                 err = -1;
2498         if (err) {
2499                 i40iw_pr_err("seq number\n");
2500                 i40iw_indicate_pkt_err(cm_node);
2501         }
2502         return err;
2503 }
2504
2505 /**
2506  * i40iw_handle_syn_pkt - is for Passive node
2507  * @cm_node: connection's node
2508  * @rbuf: receive buffer
2509  */
2510 static void i40iw_handle_syn_pkt(struct i40iw_cm_node *cm_node,
2511                                  struct i40iw_puda_buf *rbuf)
2512 {
2513         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2514         int ret;
2515         u32 inc_sequence;
2516         int optionsize;
2517         struct i40iw_cm_info nfo;
2518
2519         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2520         inc_sequence = ntohl(tcph->seq);
2521
2522         switch (cm_node->state) {
2523         case I40IW_CM_STATE_SYN_SENT:
2524         case I40IW_CM_STATE_MPAREQ_SENT:
2525                 /* Rcvd syn on active open connection */
2526                 i40iw_active_open_err(cm_node, 1);
2527                 break;
2528         case I40IW_CM_STATE_LISTENING:
2529                 /* Passive OPEN */
2530                 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
2531                     cm_node->listener->backlog) {
2532                         cm_node->cm_core->stats_backlog_drops++;
2533                         i40iw_passive_open_err(cm_node, false);
2534                         break;
2535                 }
2536                 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1);
2537                 if (ret) {
2538                         i40iw_passive_open_err(cm_node, false);
2539                         /* drop pkt */
2540                         break;
2541                 }
2542                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2543                 cm_node->accept_pend = 1;
2544                 atomic_inc(&cm_node->listener->pend_accepts_cnt);
2545
2546                 cm_node->state = I40IW_CM_STATE_SYN_RCVD;
2547                 i40iw_get_addr_info(cm_node, &nfo);
2548                 ret = i40iw_manage_qhash(cm_node->iwdev,
2549                                          &nfo,
2550                                          I40IW_QHASH_TYPE_TCP_ESTABLISHED,
2551                                          I40IW_QHASH_MANAGE_TYPE_ADD,
2552                                          (void *)cm_node,
2553                                          false);
2554                 cm_node->qhash_set = true;
2555                 break;
2556         case I40IW_CM_STATE_CLOSED:
2557                 i40iw_cleanup_retrans_entry(cm_node);
2558                 atomic_inc(&cm_node->ref_count);
2559                 i40iw_send_reset(cm_node);
2560                 break;
2561         case I40IW_CM_STATE_OFFLOADED:
2562         case I40IW_CM_STATE_ESTABLISHED:
2563         case I40IW_CM_STATE_FIN_WAIT1:
2564         case I40IW_CM_STATE_FIN_WAIT2:
2565         case I40IW_CM_STATE_MPAREQ_RCVD:
2566         case I40IW_CM_STATE_LAST_ACK:
2567         case I40IW_CM_STATE_CLOSING:
2568         case I40IW_CM_STATE_UNKNOWN:
2569         default:
2570                 break;
2571         }
2572 }
2573
2574 /**
2575  * i40iw_handle_synack_pkt - Process SYN+ACK packet (active side)
2576  * @cm_node: connection's node
2577  * @rbuf: receive buffer
2578  */
2579 static void i40iw_handle_synack_pkt(struct i40iw_cm_node *cm_node,
2580                                     struct i40iw_puda_buf *rbuf)
2581 {
2582         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2583         int ret;
2584         u32 inc_sequence;
2585         int optionsize;
2586
2587         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2588         inc_sequence = ntohl(tcph->seq);
2589         switch (cm_node->state) {
2590         case I40IW_CM_STATE_SYN_SENT:
2591                 i40iw_cleanup_retrans_entry(cm_node);
2592                 /* active open */
2593                 if (i40iw_check_syn(cm_node, tcph)) {
2594                         i40iw_pr_err("check syn fail\n");
2595                         return;
2596                 }
2597                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2598                 /* setup options */
2599                 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 0);
2600                 if (ret) {
2601                         i40iw_debug(cm_node->dev,
2602                                     I40IW_DEBUG_CM,
2603                                     "cm_node=%p tcp_options failed\n",
2604                                     cm_node);
2605                         break;
2606                 }
2607                 i40iw_cleanup_retrans_entry(cm_node);
2608                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2609                 i40iw_send_ack(cm_node);        /* ACK  for the syn_ack */
2610                 ret = i40iw_send_mpa_request(cm_node);
2611                 if (ret) {
2612                         i40iw_debug(cm_node->dev,
2613                                     I40IW_DEBUG_CM,
2614                                     "cm_node=%p i40iw_send_mpa_request failed\n",
2615                                     cm_node);
2616                         break;
2617                 }
2618                 cm_node->state = I40IW_CM_STATE_MPAREQ_SENT;
2619                 break;
2620         case I40IW_CM_STATE_MPAREQ_RCVD:
2621                 i40iw_passive_open_err(cm_node, true);
2622                 break;
2623         case I40IW_CM_STATE_LISTENING:
2624                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2625                 i40iw_cleanup_retrans_entry(cm_node);
2626                 cm_node->state = I40IW_CM_STATE_CLOSED;
2627                 i40iw_send_reset(cm_node);
2628                 break;
2629         case I40IW_CM_STATE_CLOSED:
2630                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2631                 i40iw_cleanup_retrans_entry(cm_node);
2632                 atomic_inc(&cm_node->ref_count);
2633                 i40iw_send_reset(cm_node);
2634                 break;
2635         case I40IW_CM_STATE_ESTABLISHED:
2636         case I40IW_CM_STATE_FIN_WAIT1:
2637         case I40IW_CM_STATE_FIN_WAIT2:
2638         case I40IW_CM_STATE_LAST_ACK:
2639         case I40IW_CM_STATE_OFFLOADED:
2640         case I40IW_CM_STATE_CLOSING:
2641         case I40IW_CM_STATE_UNKNOWN:
2642         case I40IW_CM_STATE_MPAREQ_SENT:
2643         default:
2644                 break;
2645         }
2646 }
2647
2648 /**
2649  * i40iw_handle_ack_pkt - process packet with ACK
2650  * @cm_node: connection's node
2651  * @rbuf: receive buffer
2652  */
2653 static int i40iw_handle_ack_pkt(struct i40iw_cm_node *cm_node,
2654                                 struct i40iw_puda_buf *rbuf)
2655 {
2656         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2657         u32 inc_sequence;
2658         int ret = 0;
2659         int optionsize;
2660         u32 datasize = rbuf->datalen;
2661
2662         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2663
2664         if (i40iw_check_seq(cm_node, tcph))
2665                 return -EINVAL;
2666
2667         inc_sequence = ntohl(tcph->seq);
2668         switch (cm_node->state) {
2669         case I40IW_CM_STATE_SYN_RCVD:
2670                 i40iw_cleanup_retrans_entry(cm_node);
2671                 ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1);
2672                 if (ret)
2673                         break;
2674                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2675                 cm_node->state = I40IW_CM_STATE_ESTABLISHED;
2676                 if (datasize) {
2677                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2678                         i40iw_handle_rcv_mpa(cm_node, rbuf);
2679                 }
2680                 break;
2681         case I40IW_CM_STATE_ESTABLISHED:
2682                 i40iw_cleanup_retrans_entry(cm_node);
2683                 if (datasize) {
2684                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2685                         i40iw_handle_rcv_mpa(cm_node, rbuf);
2686                 }
2687                 break;
2688         case I40IW_CM_STATE_MPAREQ_SENT:
2689                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2690                 if (datasize) {
2691                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2692                         i40iw_handle_rcv_mpa(cm_node, rbuf);
2693                 }
2694                 break;
2695         case I40IW_CM_STATE_LISTENING:
2696                 i40iw_cleanup_retrans_entry(cm_node);
2697                 cm_node->state = I40IW_CM_STATE_CLOSED;
2698                 i40iw_send_reset(cm_node);
2699                 break;
2700         case I40IW_CM_STATE_CLOSED:
2701                 i40iw_cleanup_retrans_entry(cm_node);
2702                 atomic_inc(&cm_node->ref_count);
2703                 i40iw_send_reset(cm_node);
2704                 break;
2705         case I40IW_CM_STATE_LAST_ACK:
2706         case I40IW_CM_STATE_CLOSING:
2707                 i40iw_cleanup_retrans_entry(cm_node);
2708                 cm_node->state = I40IW_CM_STATE_CLOSED;
2709                 if (!cm_node->accept_pend)
2710                         cm_node->cm_id->rem_ref(cm_node->cm_id);
2711                 i40iw_rem_ref_cm_node(cm_node);
2712                 break;
2713         case I40IW_CM_STATE_FIN_WAIT1:
2714                 i40iw_cleanup_retrans_entry(cm_node);
2715                 cm_node->state = I40IW_CM_STATE_FIN_WAIT2;
2716                 break;
2717         case I40IW_CM_STATE_SYN_SENT:
2718         case I40IW_CM_STATE_FIN_WAIT2:
2719         case I40IW_CM_STATE_OFFLOADED:
2720         case I40IW_CM_STATE_MPAREQ_RCVD:
2721         case I40IW_CM_STATE_UNKNOWN:
2722         default:
2723                 i40iw_cleanup_retrans_entry(cm_node);
2724                 break;
2725         }
2726         return ret;
2727 }
2728
2729 /**
2730  * i40iw_process_packet - process cm packet
2731  * @cm_node: connection's node
2732  * @rbuf: receive buffer
2733  */
2734 static void i40iw_process_packet(struct i40iw_cm_node *cm_node,
2735                                  struct i40iw_puda_buf *rbuf)
2736 {
2737         enum i40iw_tcpip_pkt_type pkt_type = I40IW_PKT_TYPE_UNKNOWN;
2738         struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
2739         u32 fin_set = 0;
2740         int ret;
2741
2742         if (tcph->rst) {
2743                 pkt_type = I40IW_PKT_TYPE_RST;
2744         } else if (tcph->syn) {
2745                 pkt_type = I40IW_PKT_TYPE_SYN;
2746                 if (tcph->ack)
2747                         pkt_type = I40IW_PKT_TYPE_SYNACK;
2748         } else if (tcph->ack) {
2749                 pkt_type = I40IW_PKT_TYPE_ACK;
2750         }
2751         if (tcph->fin)
2752                 fin_set = 1;
2753
2754         switch (pkt_type) {
2755         case I40IW_PKT_TYPE_SYN:
2756                 i40iw_handle_syn_pkt(cm_node, rbuf);
2757                 break;
2758         case I40IW_PKT_TYPE_SYNACK:
2759                 i40iw_handle_synack_pkt(cm_node, rbuf);
2760                 break;
2761         case I40IW_PKT_TYPE_ACK:
2762                 ret = i40iw_handle_ack_pkt(cm_node, rbuf);
2763                 if (fin_set && !ret)
2764                         i40iw_handle_fin_pkt(cm_node);
2765                 break;
2766         case I40IW_PKT_TYPE_RST:
2767                 i40iw_handle_rst_pkt(cm_node, rbuf);
2768                 break;
2769         default:
2770                 if (fin_set &&
2771                     (!i40iw_check_seq(cm_node, (struct tcphdr *)rbuf->tcph)))
2772                         i40iw_handle_fin_pkt(cm_node);
2773                 break;
2774         }
2775 }
2776
2777 /**
2778  * i40iw_make_listen_node - create a listen node with params
2779  * @cm_core: cm's core
2780  * @iwdev: iwarp device structure
2781  * @cm_info: quad info for connection
2782  */
2783 static struct i40iw_cm_listener *i40iw_make_listen_node(
2784                                         struct i40iw_cm_core *cm_core,
2785                                         struct i40iw_device *iwdev,
2786                                         struct i40iw_cm_info *cm_info)
2787 {
2788         struct i40iw_cm_listener *listener;
2789         unsigned long flags;
2790
2791         /* cannot have multiple matching listeners */
2792         listener = i40iw_find_listener(cm_core, cm_info->loc_addr,
2793                                        cm_info->loc_port,
2794                                        cm_info->vlan_id,
2795                                        I40IW_CM_LISTENER_EITHER_STATE);
2796         if (listener &&
2797             (listener->listener_state == I40IW_CM_LISTENER_ACTIVE_STATE)) {
2798                 atomic_dec(&listener->ref_count);
2799                 i40iw_debug(cm_core->dev,
2800                             I40IW_DEBUG_CM,
2801                             "Not creating listener since it already exists\n");
2802                 return NULL;
2803         }
2804
2805         if (!listener) {
2806                 /* create a CM listen node (1/2 node to compare incoming traffic to) */
2807                 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
2808                 if (!listener)
2809                         return NULL;
2810                 cm_core->stats_listen_nodes_created++;
2811                 memcpy(listener->loc_addr, cm_info->loc_addr, sizeof(listener->loc_addr));
2812                 listener->loc_port = cm_info->loc_port;
2813
2814                 INIT_LIST_HEAD(&listener->child_listen_list);
2815
2816                 atomic_set(&listener->ref_count, 1);
2817         } else {
2818                 listener->reused_node = 1;
2819         }
2820
2821         listener->cm_id = cm_info->cm_id;
2822         listener->ipv4 = cm_info->ipv4;
2823         listener->vlan_id = cm_info->vlan_id;
2824         atomic_set(&listener->pend_accepts_cnt, 0);
2825         listener->cm_core = cm_core;
2826         listener->iwdev = iwdev;
2827
2828         listener->backlog = cm_info->backlog;
2829         listener->listener_state = I40IW_CM_LISTENER_ACTIVE_STATE;
2830
2831         if (!listener->reused_node) {
2832                 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2833                 list_add(&listener->list, &cm_core->listen_nodes);
2834                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2835         }
2836
2837         return listener;
2838 }
2839
2840 /**
2841  * i40iw_create_cm_node - make a connection node with params
2842  * @cm_core: cm's core
2843  * @iwdev: iwarp device structure
2844  * @private_data_len: len to provate data for mpa request
2845  * @private_data: pointer to private data for connection
2846  * @cm_info: quad info for connection
2847  */
2848 static struct i40iw_cm_node *i40iw_create_cm_node(
2849                                         struct i40iw_cm_core *cm_core,
2850                                         struct i40iw_device *iwdev,
2851                                         u16 private_data_len,
2852                                         void *private_data,
2853                                         struct i40iw_cm_info *cm_info)
2854 {
2855         int ret;
2856         struct i40iw_cm_node *cm_node;
2857         struct i40iw_cm_listener *loopback_remotelistener;
2858         struct i40iw_cm_node *loopback_remotenode;
2859         struct i40iw_cm_info loopback_cm_info;
2860
2861         /* create a CM connection node */
2862         cm_node = i40iw_make_cm_node(cm_core, iwdev, cm_info, NULL);
2863         if (!cm_node)
2864                 return NULL;
2865         /* set our node side to client (active) side */
2866         cm_node->tcp_cntxt.client = 1;
2867         cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE;
2868
2869         if (!memcmp(cm_info->loc_addr, cm_info->rem_addr, sizeof(cm_info->loc_addr))) {
2870                 loopback_remotelistener = i40iw_find_listener(
2871                                                 cm_core,
2872                                                 cm_info->rem_addr,
2873                                                 cm_node->rem_port,
2874                                                 cm_node->vlan_id,
2875                                                 I40IW_CM_LISTENER_ACTIVE_STATE);
2876                 if (!loopback_remotelistener) {
2877                         i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
2878                 } else {
2879                         loopback_cm_info = *cm_info;
2880                         loopback_cm_info.loc_port = cm_info->rem_port;
2881                         loopback_cm_info.rem_port = cm_info->loc_port;
2882                         loopback_cm_info.cm_id = loopback_remotelistener->cm_id;
2883                         loopback_cm_info.ipv4 = cm_info->ipv4;
2884                         loopback_remotenode = i40iw_make_cm_node(cm_core,
2885                                                                  iwdev,
2886                                                                  &loopback_cm_info,
2887                                                                  loopback_remotelistener);
2888                         if (!loopback_remotenode) {
2889                                 i40iw_rem_ref_cm_node(cm_node);
2890                                 return NULL;
2891                         }
2892                         cm_core->stats_loopbacks++;
2893                         loopback_remotenode->loopbackpartner = cm_node;
2894                         loopback_remotenode->tcp_cntxt.rcv_wscale =
2895                                 I40IW_CM_DEFAULT_RCV_WND_SCALE;
2896                         cm_node->loopbackpartner = loopback_remotenode;
2897                         memcpy(loopback_remotenode->pdata_buf, private_data,
2898                                private_data_len);
2899                         loopback_remotenode->pdata.size = private_data_len;
2900
2901                         cm_node->state = I40IW_CM_STATE_OFFLOADED;
2902                         cm_node->tcp_cntxt.rcv_nxt =
2903                                 loopback_remotenode->tcp_cntxt.loc_seq_num;
2904                         loopback_remotenode->tcp_cntxt.rcv_nxt =
2905                                 cm_node->tcp_cntxt.loc_seq_num;
2906                         cm_node->tcp_cntxt.max_snd_wnd =
2907                                 loopback_remotenode->tcp_cntxt.rcv_wnd;
2908                         loopback_remotenode->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
2909                         cm_node->tcp_cntxt.snd_wnd = loopback_remotenode->tcp_cntxt.rcv_wnd;
2910                         loopback_remotenode->tcp_cntxt.snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
2911                         cm_node->tcp_cntxt.snd_wscale = loopback_remotenode->tcp_cntxt.rcv_wscale;
2912                         loopback_remotenode->tcp_cntxt.snd_wscale = cm_node->tcp_cntxt.rcv_wscale;
2913                         loopback_remotenode->state = I40IW_CM_STATE_MPAREQ_RCVD;
2914                         i40iw_create_event(loopback_remotenode, I40IW_CM_EVENT_MPA_REQ);
2915                 }
2916                 return cm_node;
2917         }
2918
2919         cm_node->pdata.size = private_data_len;
2920         cm_node->pdata.addr = cm_node->pdata_buf;
2921
2922         memcpy(cm_node->pdata_buf, private_data, private_data_len);
2923
2924         cm_node->state = I40IW_CM_STATE_SYN_SENT;
2925         ret = i40iw_send_syn(cm_node, 0);
2926
2927         if (ret) {
2928                 if (cm_node->ipv4)
2929                         i40iw_debug(cm_node->dev,
2930                                     I40IW_DEBUG_CM,
2931                                     "Api - connect() FAILED: dest addr=%pI4",
2932                                     cm_node->rem_addr);
2933                 else
2934                         i40iw_debug(cm_node->dev, I40IW_DEBUG_CM,
2935                                     "Api - connect() FAILED: dest addr=%pI6",
2936                                     cm_node->rem_addr);
2937                 i40iw_rem_ref_cm_node(cm_node);
2938                 cm_node = NULL;
2939         }
2940
2941         if (cm_node)
2942                 i40iw_debug(cm_node->dev,
2943                             I40IW_DEBUG_CM,
2944                             "Api - connect(): port=0x%04x, cm_node=%p, cm_id = %p.\n",
2945                             cm_node->rem_port,
2946                             cm_node,
2947                             cm_node->cm_id);
2948
2949         return cm_node;
2950 }
2951
2952 /**
2953  * i40iw_cm_reject - reject and teardown a connection
2954  * @cm_node: connection's node
2955  * @pdate: ptr to private data for reject
2956  * @plen: size of private data
2957  */
2958 static int i40iw_cm_reject(struct i40iw_cm_node *cm_node, const void *pdata, u8 plen)
2959 {
2960         int ret = 0;
2961         int err;
2962         int passive_state;
2963         struct iw_cm_id *cm_id = cm_node->cm_id;
2964         struct i40iw_cm_node *loopback = cm_node->loopbackpartner;
2965
2966         if (cm_node->tcp_cntxt.client)
2967                 return ret;
2968         i40iw_cleanup_retrans_entry(cm_node);
2969
2970         if (!loopback) {
2971                 passive_state = atomic_add_return(1, &cm_node->passive_state);
2972                 if (passive_state == I40IW_SEND_RESET_EVENT) {
2973                         cm_node->state = I40IW_CM_STATE_CLOSED;
2974                         i40iw_rem_ref_cm_node(cm_node);
2975                 } else {
2976                         if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
2977                                 i40iw_rem_ref_cm_node(cm_node);
2978                         } else {
2979                                 ret = i40iw_send_mpa_reject(cm_node, pdata, plen);
2980                                 if (ret) {
2981                                         cm_node->state = I40IW_CM_STATE_CLOSED;
2982                                         err = i40iw_send_reset(cm_node);
2983                                         if (err)
2984                                                 i40iw_pr_err("send reset failed\n");
2985                                 } else {
2986                                         cm_id->add_ref(cm_id);
2987                                 }
2988                         }
2989                 }
2990         } else {
2991                 cm_node->cm_id = NULL;
2992                 if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
2993                         i40iw_rem_ref_cm_node(cm_node);
2994                         i40iw_rem_ref_cm_node(loopback);
2995                 } else {
2996                         ret = i40iw_send_cm_event(loopback,
2997                                                   loopback->cm_id,
2998                                                   IW_CM_EVENT_CONNECT_REPLY,
2999                                                   -ECONNREFUSED);
3000                         i40iw_rem_ref_cm_node(cm_node);
3001                         loopback->state = I40IW_CM_STATE_CLOSING;
3002
3003                         cm_id = loopback->cm_id;
3004                         i40iw_rem_ref_cm_node(loopback);
3005                         cm_id->rem_ref(cm_id);
3006                 }
3007         }
3008
3009         return ret;
3010 }
3011
3012 /**
3013  * i40iw_cm_close - close of cm connection
3014  * @cm_node: connection's node
3015  */
3016 static int i40iw_cm_close(struct i40iw_cm_node *cm_node)
3017 {
3018         int ret = 0;
3019
3020         if (!cm_node)
3021                 return -EINVAL;
3022
3023         switch (cm_node->state) {
3024         case I40IW_CM_STATE_SYN_RCVD:
3025         case I40IW_CM_STATE_SYN_SENT:
3026         case I40IW_CM_STATE_ONE_SIDE_ESTABLISHED:
3027         case I40IW_CM_STATE_ESTABLISHED:
3028         case I40IW_CM_STATE_ACCEPTING:
3029         case I40IW_CM_STATE_MPAREQ_SENT:
3030         case I40IW_CM_STATE_MPAREQ_RCVD:
3031                 i40iw_cleanup_retrans_entry(cm_node);
3032                 i40iw_send_reset(cm_node);
3033                 break;
3034         case I40IW_CM_STATE_CLOSE_WAIT:
3035                 cm_node->state = I40IW_CM_STATE_LAST_ACK;
3036                 i40iw_send_fin(cm_node);
3037                 break;
3038         case I40IW_CM_STATE_FIN_WAIT1:
3039         case I40IW_CM_STATE_FIN_WAIT2:
3040         case I40IW_CM_STATE_LAST_ACK:
3041         case I40IW_CM_STATE_TIME_WAIT:
3042         case I40IW_CM_STATE_CLOSING:
3043                 ret = -1;
3044                 break;
3045         case I40IW_CM_STATE_LISTENING:
3046                 i40iw_cleanup_retrans_entry(cm_node);
3047                 i40iw_send_reset(cm_node);
3048                 break;
3049         case I40IW_CM_STATE_MPAREJ_RCVD:
3050         case I40IW_CM_STATE_UNKNOWN:
3051         case I40IW_CM_STATE_INITED:
3052         case I40IW_CM_STATE_CLOSED:
3053         case I40IW_CM_STATE_LISTENER_DESTROYED:
3054                 i40iw_rem_ref_cm_node(cm_node);
3055                 break;
3056         case I40IW_CM_STATE_OFFLOADED:
3057                 if (cm_node->send_entry)
3058                         i40iw_pr_err("send_entry\n");
3059                 i40iw_rem_ref_cm_node(cm_node);
3060                 break;
3061         }
3062         return ret;
3063 }
3064
3065 /**
3066  * i40iw_receive_ilq - recv an ETHERNET packet, and process it
3067  * through CM
3068  * @dev: FPK dev struct
3069  * @rbuf: receive buffer
3070  */
3071 void i40iw_receive_ilq(struct i40iw_sc_dev *dev, struct i40iw_puda_buf *rbuf)
3072 {
3073         struct i40iw_cm_node *cm_node;
3074         struct i40iw_cm_listener *listener;
3075         struct iphdr *iph;
3076         struct ipv6hdr *ip6h;
3077         struct tcphdr *tcph;
3078         struct i40iw_cm_info cm_info;
3079         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
3080         struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3081         struct vlan_ethhdr *ethh;
3082
3083         /* if vlan, then maclen = 18 else 14 */
3084         iph = (struct iphdr *)rbuf->iph;
3085         memset(&cm_info, 0, sizeof(cm_info));
3086
3087         i40iw_debug_buf(dev,
3088                         I40IW_DEBUG_ILQ,
3089                         "RECEIVE ILQ BUFFER",
3090                         rbuf->mem.va,
3091                         rbuf->totallen);
3092         ethh = (struct vlan_ethhdr *)rbuf->mem.va;
3093
3094         if (ethh->h_vlan_proto == htons(ETH_P_8021Q)) {
3095                 cm_info.vlan_id = ntohs(ethh->h_vlan_TCI) & VLAN_VID_MASK;
3096                 i40iw_debug(cm_core->dev,
3097                             I40IW_DEBUG_CM,
3098                             "%s vlan_id=%d\n",
3099                             __func__,
3100                             cm_info.vlan_id);
3101         } else {
3102                 cm_info.vlan_id = I40IW_NO_VLAN;
3103         }
3104         tcph = (struct tcphdr *)rbuf->tcph;
3105
3106         if (rbuf->ipv4) {
3107                 cm_info.loc_addr[0] = ntohl(iph->daddr);
3108                 cm_info.rem_addr[0] = ntohl(iph->saddr);
3109                 cm_info.ipv4 = true;
3110         } else {
3111                 ip6h = (struct ipv6hdr *)rbuf->iph;
3112                 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3113                                     ip6h->daddr.in6_u.u6_addr32);
3114                 i40iw_copy_ip_ntohl(cm_info.rem_addr,
3115                                     ip6h->saddr.in6_u.u6_addr32);
3116                 cm_info.ipv4 = false;
3117         }
3118         cm_info.loc_port = ntohs(tcph->dest);
3119         cm_info.rem_port = ntohs(tcph->source);
3120         cm_node = i40iw_find_node(cm_core,
3121                                   cm_info.rem_port,
3122                                   cm_info.rem_addr,
3123                                   cm_info.loc_port,
3124                                   cm_info.loc_addr,
3125                                   true);
3126
3127         if (!cm_node) {
3128                 /* Only type of packet accepted are for */
3129                 /* the PASSIVE open (syn only) */
3130                 if (!tcph->syn || tcph->ack)
3131                         return;
3132                 listener =
3133                     i40iw_find_listener(cm_core,
3134                                         cm_info.loc_addr,
3135                                         cm_info.loc_port,
3136                                         cm_info.vlan_id,
3137                                         I40IW_CM_LISTENER_ACTIVE_STATE);
3138                 if (!listener) {
3139                         cm_info.cm_id = NULL;
3140                         i40iw_debug(cm_core->dev,
3141                                     I40IW_DEBUG_CM,
3142                                     "%s no listener found\n",
3143                                     __func__);
3144                         return;
3145                 }
3146                 cm_info.cm_id = listener->cm_id;
3147                 cm_node = i40iw_make_cm_node(cm_core, iwdev, &cm_info, listener);
3148                 if (!cm_node) {
3149                         i40iw_debug(cm_core->dev,
3150                                     I40IW_DEBUG_CM,
3151                                     "%s allocate node failed\n",
3152                                     __func__);
3153                         atomic_dec(&listener->ref_count);
3154                         return;
3155                 }
3156                 if (!tcph->rst && !tcph->fin) {
3157                         cm_node->state = I40IW_CM_STATE_LISTENING;
3158                 } else {
3159                         i40iw_rem_ref_cm_node(cm_node);
3160                         return;
3161                 }
3162                 atomic_inc(&cm_node->ref_count);
3163         } else if (cm_node->state == I40IW_CM_STATE_OFFLOADED) {
3164                 i40iw_rem_ref_cm_node(cm_node);
3165                 return;
3166         }
3167         i40iw_process_packet(cm_node, rbuf);
3168         i40iw_rem_ref_cm_node(cm_node);
3169 }
3170
3171 /**
3172  * i40iw_setup_cm_core - allocate a top level instance of a cm
3173  * core
3174  * @iwdev: iwarp device structure
3175  */
3176 void i40iw_setup_cm_core(struct i40iw_device *iwdev)
3177 {
3178         struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3179
3180         cm_core->iwdev = iwdev;
3181         cm_core->dev = &iwdev->sc_dev;
3182
3183         INIT_LIST_HEAD(&cm_core->connected_nodes);
3184         INIT_LIST_HEAD(&cm_core->listen_nodes);
3185
3186         init_timer(&cm_core->tcp_timer);
3187         cm_core->tcp_timer.function = i40iw_cm_timer_tick;
3188         cm_core->tcp_timer.data = (unsigned long)cm_core;
3189
3190         spin_lock_init(&cm_core->ht_lock);
3191         spin_lock_init(&cm_core->listen_list_lock);
3192
3193         cm_core->event_wq = create_singlethread_workqueue("iwewq");
3194         cm_core->disconn_wq = create_singlethread_workqueue("iwdwq");
3195 }
3196
3197 /**
3198  * i40iw_cleanup_cm_core - deallocate a top level instance of a
3199  * cm core
3200  * @cm_core: cm's core
3201  */
3202 void i40iw_cleanup_cm_core(struct i40iw_cm_core *cm_core)
3203 {
3204         unsigned long flags;
3205
3206         if (!cm_core)
3207                 return;
3208
3209         spin_lock_irqsave(&cm_core->ht_lock, flags);
3210         if (timer_pending(&cm_core->tcp_timer))
3211                 del_timer_sync(&cm_core->tcp_timer);
3212         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
3213
3214         destroy_workqueue(cm_core->event_wq);
3215         destroy_workqueue(cm_core->disconn_wq);
3216 }
3217
3218 /**
3219  * i40iw_init_tcp_ctx - setup qp context
3220  * @cm_node: connection's node
3221  * @tcp_info: offload info for tcp
3222  * @iwqp: associate qp for the connection
3223  */
3224 static void i40iw_init_tcp_ctx(struct i40iw_cm_node *cm_node,
3225                                struct i40iw_tcp_offload_info *tcp_info,
3226                                struct i40iw_qp *iwqp)
3227 {
3228         tcp_info->ipv4 = cm_node->ipv4;
3229         tcp_info->drop_ooo_seg = true;
3230         tcp_info->wscale = true;
3231         tcp_info->ignore_tcp_opt = true;
3232         tcp_info->ignore_tcp_uns_opt = true;
3233         tcp_info->no_nagle = false;
3234
3235         tcp_info->ttl = I40IW_DEFAULT_TTL;
3236         tcp_info->rtt_var = cpu_to_le32(I40IW_DEFAULT_RTT_VAR);
3237         tcp_info->ss_thresh = cpu_to_le32(I40IW_DEFAULT_SS_THRESH);
3238         tcp_info->rexmit_thresh = I40IW_DEFAULT_REXMIT_THRESH;
3239
3240         tcp_info->tcp_state = I40IW_TCP_STATE_ESTABLISHED;
3241         tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale;
3242         tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale;
3243
3244         tcp_info->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3245         tcp_info->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
3246         tcp_info->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
3247         tcp_info->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3248
3249         tcp_info->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3250         tcp_info->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss);
3251         tcp_info->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
3252         tcp_info->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
3253         tcp_info->max_snd_window = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
3254         tcp_info->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
3255                                         cm_node->tcp_cntxt.rcv_wscale);
3256
3257         tcp_info->flow_label = 0;
3258         tcp_info->snd_mss = cpu_to_le32(((u32)cm_node->tcp_cntxt.mss));
3259         if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
3260                 tcp_info->insert_vlan_tag = true;
3261                 tcp_info->vlan_tag = cpu_to_le16(cm_node->vlan_id);
3262         }
3263         if (cm_node->ipv4) {
3264                 tcp_info->src_port = cpu_to_le16(cm_node->loc_port);
3265                 tcp_info->dst_port = cpu_to_le16(cm_node->rem_port);
3266
3267                 tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[0]);
3268                 tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[0]);
3269                 tcp_info->arp_idx = cpu_to_le32(i40iw_arp_table(iwqp->iwdev,
3270                                                                 &tcp_info->dest_ip_addr3,
3271                                                                 true,
3272                                                                 NULL,
3273                                                                 I40IW_ARP_RESOLVE));
3274         } else {
3275                 tcp_info->src_port = cpu_to_le16(cm_node->loc_port);
3276                 tcp_info->dst_port = cpu_to_le16(cm_node->rem_port);
3277                 tcp_info->dest_ip_addr0 = cpu_to_le32(cm_node->rem_addr[0]);
3278                 tcp_info->dest_ip_addr1 = cpu_to_le32(cm_node->rem_addr[1]);
3279                 tcp_info->dest_ip_addr2 = cpu_to_le32(cm_node->rem_addr[2]);
3280                 tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->rem_addr[3]);
3281                 tcp_info->local_ipaddr0 = cpu_to_le32(cm_node->loc_addr[0]);
3282                 tcp_info->local_ipaddr1 = cpu_to_le32(cm_node->loc_addr[1]);
3283                 tcp_info->local_ipaddr2 = cpu_to_le32(cm_node->loc_addr[2]);
3284                 tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->loc_addr[3]);
3285                 tcp_info->arp_idx = cpu_to_le32(i40iw_arp_table(
3286                                                         iwqp->iwdev,
3287                                                         &tcp_info->dest_ip_addr0,
3288                                                         false,
3289                                                         NULL,
3290                                                         I40IW_ARP_RESOLVE));
3291         }
3292 }
3293
3294 /**
3295  * i40iw_cm_init_tsa_conn - setup qp for RTS
3296  * @iwqp: associate qp for the connection
3297  * @cm_node: connection's node
3298  */
3299 static void i40iw_cm_init_tsa_conn(struct i40iw_qp *iwqp,
3300                                    struct i40iw_cm_node *cm_node)
3301 {
3302         struct i40iw_tcp_offload_info tcp_info;
3303         struct i40iwarp_offload_info *iwarp_info;
3304         struct i40iw_qp_host_ctx_info *ctx_info;
3305         struct i40iw_device *iwdev = iwqp->iwdev;
3306         struct i40iw_sc_dev *dev = &iwqp->iwdev->sc_dev;
3307
3308         memset(&tcp_info, 0x00, sizeof(struct i40iw_tcp_offload_info));
3309         iwarp_info = &iwqp->iwarp_info;
3310         ctx_info = &iwqp->ctx_info;
3311
3312         ctx_info->tcp_info = &tcp_info;
3313         ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id;
3314         ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id;
3315
3316         iwarp_info->ord_size = cm_node->ord_size;
3317         iwarp_info->ird_size = i40iw_derive_hw_ird_setting(cm_node->ird_size);
3318
3319         if (iwarp_info->ord_size == 1)
3320                 iwarp_info->ord_size = 2;
3321
3322         iwarp_info->rd_enable = true;
3323         iwarp_info->rdmap_ver = 1;
3324         iwarp_info->ddp_ver = 1;
3325
3326         iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id;
3327
3328         ctx_info->tcp_info_valid = true;
3329         ctx_info->iwarp_info_valid = true;
3330
3331         i40iw_init_tcp_ctx(cm_node, &tcp_info, iwqp);
3332         if (cm_node->snd_mark_en) {
3333                 iwarp_info->snd_mark_en = true;
3334                 iwarp_info->snd_mark_offset = (tcp_info.snd_nxt &
3335                                 SNDMARKER_SEQNMASK) + cm_node->lsmm_size;
3336         }
3337
3338         cm_node->state = I40IW_CM_STATE_OFFLOADED;
3339         tcp_info.tcp_state = I40IW_TCP_STATE_ESTABLISHED;
3340         tcp_info.src_mac_addr_idx = iwdev->mac_ip_table_idx;
3341
3342         dev->iw_priv_qp_ops->qp_setctx(&iwqp->sc_qp, (u64 *)(iwqp->host_ctx.va), ctx_info);
3343
3344         /* once tcp_info is set, no need to do it again */
3345         ctx_info->tcp_info_valid = false;
3346         ctx_info->iwarp_info_valid = false;
3347 }
3348
3349 /**
3350  * i40iw_cm_disconn - when a connection is being closed
3351  * @iwqp: associate qp for the connection
3352  */
3353 int i40iw_cm_disconn(struct i40iw_qp *iwqp)
3354 {
3355         struct disconn_work *work;
3356         struct i40iw_device *iwdev = iwqp->iwdev;
3357         struct i40iw_cm_core *cm_core = &iwdev->cm_core;
3358
3359         work = kzalloc(sizeof(*work), GFP_ATOMIC);
3360         if (!work)
3361                 return -ENOMEM; /* Timer will clean up */
3362
3363         i40iw_add_ref(&iwqp->ibqp);
3364         work->iwqp = iwqp;
3365         INIT_WORK(&work->work, i40iw_disconnect_worker);
3366         queue_work(cm_core->disconn_wq, &work->work);
3367         return 0;
3368 }
3369
3370 /**
3371  * i40iw_loopback_nop - Send a nop
3372  * @qp: associated hw qp
3373  */
3374 static void i40iw_loopback_nop(struct i40iw_sc_qp *qp)
3375 {
3376         u64 *wqe;
3377         u64 header;
3378
3379         wqe = qp->qp_uk.sq_base->elem;
3380         set_64bit_val(wqe, 0, 0);
3381         set_64bit_val(wqe, 8, 0);
3382         set_64bit_val(wqe, 16, 0);
3383
3384         header = LS_64(I40IWQP_OP_NOP, I40IWQPSQ_OPCODE) |
3385             LS_64(0, I40IWQPSQ_SIGCOMPL) |
3386             LS_64(qp->qp_uk.swqe_polarity, I40IWQPSQ_VALID);
3387         set_64bit_val(wqe, 24, header);
3388 }
3389
3390 /**
3391  * i40iw_qp_disconnect - free qp and close cm
3392  * @iwqp: associate qp for the connection
3393  */
3394 static void i40iw_qp_disconnect(struct i40iw_qp *iwqp)
3395 {
3396         struct i40iw_device *iwdev;
3397         struct i40iw_ib_device *iwibdev;
3398
3399         iwdev = to_iwdev(iwqp->ibqp.device);
3400         if (!iwdev) {
3401                 i40iw_pr_err("iwdev == NULL\n");
3402                 return;
3403         }
3404
3405         iwibdev = iwdev->iwibdev;
3406
3407         if (iwqp->active_conn) {
3408                 /* indicate this connection is NOT active */
3409                 iwqp->active_conn = 0;
3410         } else {
3411                 /* Need to free the Last Streaming Mode Message */
3412                 if (iwqp->ietf_mem.va) {
3413                         if (iwqp->lsmm_mr)
3414                                 iwibdev->ibdev.dereg_mr(iwqp->lsmm_mr);
3415                         i40iw_free_dma_mem(iwdev->sc_dev.hw, &iwqp->ietf_mem);
3416                 }
3417         }
3418
3419         /* close the CM node down if it is still active */
3420         if (iwqp->cm_node) {
3421                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "%s Call close API\n", __func__);
3422                 i40iw_cm_close(iwqp->cm_node);
3423         }
3424 }
3425
3426 /**
3427  * i40iw_cm_disconn_true - called by worker thread to disconnect qp
3428  * @iwqp: associate qp for the connection
3429  */
3430 static void i40iw_cm_disconn_true(struct i40iw_qp *iwqp)
3431 {
3432         struct iw_cm_id *cm_id;
3433         struct i40iw_device *iwdev;
3434         struct i40iw_sc_qp *qp = &iwqp->sc_qp;
3435         u16 last_ae;
3436         u8 original_hw_tcp_state;
3437         u8 original_ibqp_state;
3438         int disconn_status = 0;
3439         int issue_disconn = 0;
3440         int issue_close = 0;
3441         int issue_flush = 0;
3442         struct ib_event ibevent;
3443         unsigned long flags;
3444         int ret;
3445
3446         if (!iwqp) {
3447                 i40iw_pr_err("iwqp == NULL\n");
3448                 return;
3449         }
3450
3451         spin_lock_irqsave(&iwqp->lock, flags);
3452         cm_id = iwqp->cm_id;
3453         /* make sure we havent already closed this connection */
3454         if (!cm_id) {
3455                 spin_unlock_irqrestore(&iwqp->lock, flags);
3456                 return;
3457         }
3458
3459         iwdev = to_iwdev(iwqp->ibqp.device);
3460
3461         original_hw_tcp_state = iwqp->hw_tcp_state;
3462         original_ibqp_state = iwqp->ibqp_state;
3463         last_ae = iwqp->last_aeq;
3464
3465         if (qp->term_flags) {
3466                 issue_disconn = 1;
3467                 issue_close = 1;
3468                 iwqp->cm_id = NULL;
3469                 /*When term timer expires after cm_timer, don't want
3470                  *terminate-handler to issue cm_disconn which can re-free
3471                  *a QP even after its refcnt=0.
3472                  */
3473                 del_timer(&iwqp->terminate_timer);
3474                 if (!iwqp->flush_issued) {
3475                         iwqp->flush_issued = 1;
3476                         issue_flush = 1;
3477                 }
3478         } else if ((original_hw_tcp_state == I40IW_TCP_STATE_CLOSE_WAIT) ||
3479                    ((original_ibqp_state == IB_QPS_RTS) &&
3480                     (last_ae == I40IW_AE_LLP_CONNECTION_RESET))) {
3481                 issue_disconn = 1;
3482                 if (last_ae == I40IW_AE_LLP_CONNECTION_RESET)
3483                         disconn_status = -ECONNRESET;
3484         }
3485
3486         if (((original_hw_tcp_state == I40IW_TCP_STATE_CLOSED) ||
3487              (original_hw_tcp_state == I40IW_TCP_STATE_TIME_WAIT) ||
3488              (last_ae == I40IW_AE_RDMAP_ROE_BAD_LLP_CLOSE) ||
3489              (last_ae == I40IW_AE_LLP_CONNECTION_RESET))) {
3490                 issue_close = 1;
3491                 iwqp->cm_id = NULL;
3492                 if (!iwqp->flush_issued) {
3493                         iwqp->flush_issued = 1;
3494                         issue_flush = 1;
3495                 }
3496         }
3497
3498         spin_unlock_irqrestore(&iwqp->lock, flags);
3499         if (issue_flush && !iwqp->destroyed) {
3500                 /* Flush the queues */
3501                 i40iw_flush_wqes(iwdev, iwqp);
3502
3503                 if (qp->term_flags) {
3504                         ibevent.device = iwqp->ibqp.device;
3505                         ibevent.event = (qp->eventtype == TERM_EVENT_QP_FATAL) ?
3506                                         IB_EVENT_QP_FATAL : IB_EVENT_QP_ACCESS_ERR;
3507                         ibevent.element.qp = &iwqp->ibqp;
3508                         iwqp->ibqp.event_handler(&ibevent, iwqp->ibqp.qp_context);
3509                 }
3510         }
3511
3512         if (cm_id && cm_id->event_handler) {
3513                 if (issue_disconn) {
3514                         ret = i40iw_send_cm_event(NULL,
3515                                                   cm_id,
3516                                                   IW_CM_EVENT_DISCONNECT,
3517                                                   disconn_status);
3518
3519                         if (ret)
3520                                 i40iw_debug(&iwdev->sc_dev,
3521                                             I40IW_DEBUG_CM,
3522                                             "disconnect event failed %s: - cm_id = %p\n",
3523                                             __func__, cm_id);
3524                 }
3525                 if (issue_close) {
3526                         i40iw_qp_disconnect(iwqp);
3527                         cm_id->provider_data = iwqp;
3528                         ret = i40iw_send_cm_event(NULL, cm_id, IW_CM_EVENT_CLOSE, 0);
3529                         if (ret)
3530                                 i40iw_debug(&iwdev->sc_dev,
3531                                             I40IW_DEBUG_CM,
3532                                             "close event failed %s: - cm_id = %p\n",
3533                                             __func__, cm_id);
3534                         cm_id->rem_ref(cm_id);
3535                 }
3536         }
3537 }
3538
3539 /**
3540  * i40iw_disconnect_worker - worker for connection close
3541  * @work: points or disconn structure
3542  */
3543 static void i40iw_disconnect_worker(struct work_struct *work)
3544 {
3545         struct disconn_work *dwork = container_of(work, struct disconn_work, work);
3546         struct i40iw_qp *iwqp = dwork->iwqp;
3547
3548         kfree(dwork);
3549         i40iw_cm_disconn_true(iwqp);
3550         i40iw_rem_ref(&iwqp->ibqp);
3551 }
3552
3553 /**
3554  * i40iw_accept - registered call for connection to be accepted
3555  * @cm_id: cm information for passive connection
3556  * @conn_param: accpet parameters
3557  */
3558 int i40iw_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3559 {
3560         struct ib_qp *ibqp;
3561         struct i40iw_qp *iwqp;
3562         struct i40iw_device *iwdev;
3563         struct i40iw_sc_dev *dev;
3564         struct i40iw_cm_node *cm_node;
3565         struct ib_qp_attr attr;
3566         int passive_state;
3567         struct i40iw_ib_device *iwibdev;
3568         struct ib_mr *ibmr;
3569         struct i40iw_pd *iwpd;
3570         u16 buf_len = 0;
3571         struct i40iw_kmem_info accept;
3572         enum i40iw_status_code status;
3573         u64 tagged_offset;
3574
3575         memset(&attr, 0, sizeof(attr));
3576         ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn);
3577         if (!ibqp)
3578                 return -EINVAL;
3579
3580         iwqp = to_iwqp(ibqp);
3581         iwdev = iwqp->iwdev;
3582         dev = &iwdev->sc_dev;
3583         cm_node = (struct i40iw_cm_node *)cm_id->provider_data;
3584
3585         if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) {
3586                 cm_node->ipv4 = true;
3587                 cm_node->vlan_id = i40iw_get_vlan_ipv4(cm_node->loc_addr);
3588         } else {
3589                 cm_node->ipv4 = false;
3590                 i40iw_netdev_vlan_ipv6(cm_node->loc_addr, &cm_node->vlan_id, NULL);
3591         }
3592         i40iw_debug(cm_node->dev,
3593                     I40IW_DEBUG_CM,
3594                     "Accept vlan_id=%d\n",
3595                     cm_node->vlan_id);
3596         if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
3597                 if (cm_node->loopbackpartner)
3598                         i40iw_rem_ref_cm_node(cm_node->loopbackpartner);
3599                 i40iw_rem_ref_cm_node(cm_node);
3600                 return -EINVAL;
3601         }
3602
3603         passive_state = atomic_add_return(1, &cm_node->passive_state);
3604         if (passive_state == I40IW_SEND_RESET_EVENT) {
3605                 i40iw_rem_ref_cm_node(cm_node);
3606                 return -ECONNRESET;
3607         }
3608
3609         cm_node->cm_core->stats_accepts++;
3610         iwqp->cm_node = (void *)cm_node;
3611         cm_node->iwqp = iwqp;
3612
3613         buf_len = conn_param->private_data_len + I40IW_MAX_IETF_SIZE + MPA_ZERO_PAD_LEN;
3614
3615         status = i40iw_allocate_dma_mem(dev->hw, &iwqp->ietf_mem, buf_len, 1);
3616
3617         if (status)
3618                 return -ENOMEM;
3619         cm_node->pdata.size = conn_param->private_data_len;
3620         accept.addr = iwqp->ietf_mem.va;
3621         accept.size = i40iw_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY);
3622         memcpy(accept.addr + accept.size, conn_param->private_data,
3623                conn_param->private_data_len);
3624
3625         /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3626         if ((cm_node->ipv4 &&
3627              !i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
3628             (!cm_node->ipv4 &&
3629              !i40iw_ipv6_is_loopback(cm_node->loc_addr, cm_node->rem_addr))) {
3630                 iwibdev = iwdev->iwibdev;
3631                 iwpd = iwqp->iwpd;
3632                 tagged_offset = (uintptr_t)iwqp->ietf_mem.va;
3633                 ibmr = i40iw_reg_phys_mr(&iwpd->ibpd,
3634                                          iwqp->ietf_mem.pa,
3635                                          buf_len,
3636                                          IB_ACCESS_LOCAL_WRITE,
3637                                          &tagged_offset);
3638                 if (IS_ERR(ibmr)) {
3639                         i40iw_free_dma_mem(dev->hw, &iwqp->ietf_mem);
3640                         return -ENOMEM;
3641                 }
3642
3643                 ibmr->pd = &iwpd->ibpd;
3644                 ibmr->device = iwpd->ibpd.device;
3645                 iwqp->lsmm_mr = ibmr;
3646                 if (iwqp->page)
3647                         iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
3648                 if (is_remote_ne020_or_chelsio(cm_node))
3649                         dev->iw_priv_qp_ops->qp_send_lsmm(
3650                                                         &iwqp->sc_qp,
3651                                                         iwqp->ietf_mem.va,
3652                                                         (accept.size + conn_param->private_data_len),
3653                                                         ibmr->lkey);
3654                 else
3655                         dev->iw_priv_qp_ops->qp_send_lsmm(
3656                                                         &iwqp->sc_qp,
3657                                                         iwqp->ietf_mem.va,
3658                                                         (accept.size + conn_param->private_data_len + MPA_ZERO_PAD_LEN),
3659                                                         ibmr->lkey);
3660
3661         } else {
3662                 if (iwqp->page)
3663                         iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
3664                 i40iw_loopback_nop(&iwqp->sc_qp);
3665         }
3666
3667         if (iwqp->page)
3668                 kunmap(iwqp->page);
3669
3670         iwqp->cm_id = cm_id;
3671         cm_node->cm_id = cm_id;
3672
3673         cm_id->provider_data = (void *)iwqp;
3674         iwqp->active_conn = 0;
3675
3676         cm_node->lsmm_size = accept.size + conn_param->private_data_len;
3677         i40iw_cm_init_tsa_conn(iwqp, cm_node);
3678         cm_id->add_ref(cm_id);
3679         i40iw_add_ref(&iwqp->ibqp);
3680
3681         i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0);
3682
3683         attr.qp_state = IB_QPS_RTS;
3684         cm_node->qhash_set = false;
3685         i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
3686         if (cm_node->loopbackpartner) {
3687                 cm_node->loopbackpartner->pdata.size = conn_param->private_data_len;
3688
3689                 /* copy entire MPA frame to our cm_node's frame */
3690                 memcpy(cm_node->loopbackpartner->pdata_buf,
3691                        conn_param->private_data,
3692                        conn_param->private_data_len);
3693                 i40iw_create_event(cm_node->loopbackpartner, I40IW_CM_EVENT_CONNECTED);
3694         }
3695
3696         cm_node->accelerated = 1;
3697         if (cm_node->accept_pend) {
3698                 if (!cm_node->listener)
3699                         i40iw_pr_err("cm_node->listener NULL for passive node\n");
3700                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
3701                 cm_node->accept_pend = 0;
3702         }
3703         return 0;
3704 }
3705
3706 /**
3707  * i40iw_reject - registered call for connection to be rejected
3708  * @cm_id: cm information for passive connection
3709  * @pdata: private data to be sent
3710  * @pdata_len: private data length
3711  */
3712 int i40iw_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3713 {
3714         struct i40iw_device *iwdev;
3715         struct i40iw_cm_node *cm_node;
3716         struct i40iw_cm_node *loopback;
3717
3718         cm_node = (struct i40iw_cm_node *)cm_id->provider_data;
3719         loopback = cm_node->loopbackpartner;
3720         cm_node->cm_id = cm_id;
3721         cm_node->pdata.size = pdata_len;
3722
3723         iwdev = to_iwdev(cm_id->device);
3724         if (!iwdev)
3725                 return -EINVAL;
3726         cm_node->cm_core->stats_rejects++;
3727
3728         if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER)
3729                 return -EINVAL;
3730
3731         if (loopback) {
3732                 memcpy(&loopback->pdata_buf, pdata, pdata_len);
3733                 loopback->pdata.size = pdata_len;
3734         }
3735
3736         return i40iw_cm_reject(cm_node, pdata, pdata_len);
3737 }
3738
3739 /**
3740  * i40iw_connect - registered call for connection to be established
3741  * @cm_id: cm information for passive connection
3742  * @conn_param: Information about the connection
3743  */
3744 int i40iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3745 {
3746         struct ib_qp *ibqp;
3747         struct i40iw_qp *iwqp;
3748         struct i40iw_device *iwdev;
3749         struct i40iw_cm_node *cm_node;
3750         struct i40iw_cm_info cm_info;
3751         struct sockaddr_in *laddr;
3752         struct sockaddr_in *raddr;
3753         struct sockaddr_in6 *laddr6;
3754         struct sockaddr_in6 *raddr6;
3755         int apbvt_set = 0;
3756         enum i40iw_status_code status;
3757
3758         ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn);
3759         if (!ibqp)
3760                 return -EINVAL;
3761         iwqp = to_iwqp(ibqp);
3762         if (!iwqp)
3763                 return -EINVAL;
3764         iwdev = to_iwdev(iwqp->ibqp.device);
3765         if (!iwdev)
3766                 return -EINVAL;
3767
3768         laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3769         raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
3770         laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3771         raddr6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr;
3772
3773         if (!(laddr->sin_port) || !(raddr->sin_port))
3774                 return -EINVAL;
3775
3776         iwqp->active_conn = 1;
3777         iwqp->cm_id = NULL;
3778         cm_id->provider_data = iwqp;
3779
3780         /* set up the connection params for the node */
3781         if (cm_id->remote_addr.ss_family == AF_INET) {
3782                 cm_info.ipv4 = true;
3783                 memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr));
3784                 memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr));
3785                 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3786                 cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr);
3787                 cm_info.loc_port = ntohs(laddr->sin_port);
3788                 cm_info.rem_port = ntohs(raddr->sin_port);
3789                 cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr);
3790         } else {
3791                 cm_info.ipv4 = false;
3792                 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3793                                     laddr6->sin6_addr.in6_u.u6_addr32);
3794                 i40iw_copy_ip_ntohl(cm_info.rem_addr,
3795                                     raddr6->sin6_addr.in6_u.u6_addr32);
3796                 cm_info.loc_port = ntohs(laddr6->sin6_port);
3797                 cm_info.rem_port = ntohs(raddr6->sin6_port);
3798                 i40iw_netdev_vlan_ipv6(cm_info.loc_addr, &cm_info.vlan_id, NULL);
3799         }
3800         cm_info.cm_id = cm_id;
3801         if ((cm_info.ipv4 && (laddr->sin_addr.s_addr != raddr->sin_addr.s_addr)) ||
3802             (!cm_info.ipv4 && memcmp(laddr6->sin6_addr.in6_u.u6_addr32,
3803                                      raddr6->sin6_addr.in6_u.u6_addr32,
3804                                      sizeof(laddr6->sin6_addr.in6_u.u6_addr32)))) {
3805                 status = i40iw_manage_qhash(iwdev,
3806                                             &cm_info,
3807                                             I40IW_QHASH_TYPE_TCP_ESTABLISHED,
3808                                             I40IW_QHASH_MANAGE_TYPE_ADD,
3809                                             NULL,
3810                                             true);
3811                 if (status)
3812                         return -EINVAL;
3813         }
3814         status = i40iw_manage_apbvt(iwdev, cm_info.loc_port, I40IW_MANAGE_APBVT_ADD);
3815         if (status) {
3816                 i40iw_manage_qhash(iwdev,
3817                                    &cm_info,
3818                                    I40IW_QHASH_TYPE_TCP_ESTABLISHED,
3819                                    I40IW_QHASH_MANAGE_TYPE_DELETE,
3820                                    NULL,
3821                                    false);
3822                 return -EINVAL;
3823         }
3824
3825         apbvt_set = 1;
3826         cm_id->add_ref(cm_id);
3827         cm_node = i40iw_create_cm_node(&iwdev->cm_core, iwdev,
3828                                        conn_param->private_data_len,
3829                                        (void *)conn_param->private_data,
3830                                        &cm_info);
3831         if (!cm_node) {
3832                 i40iw_manage_qhash(iwdev,
3833                                    &cm_info,
3834                                    I40IW_QHASH_TYPE_TCP_ESTABLISHED,
3835                                    I40IW_QHASH_MANAGE_TYPE_DELETE,
3836                                    NULL,
3837                                    false);
3838
3839                 if (apbvt_set && !i40iw_listen_port_in_use(&iwdev->cm_core,
3840                                                            cm_info.loc_port))
3841                         i40iw_manage_apbvt(iwdev,
3842                                            cm_info.loc_port,
3843                                            I40IW_MANAGE_APBVT_DEL);
3844                 cm_id->rem_ref(cm_id);
3845                 iwdev->cm_core.stats_connect_errs++;
3846                 return -ENOMEM;
3847         }
3848
3849         i40iw_record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord);
3850         if (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO &&
3851             !cm_node->ord_size)
3852                 cm_node->ord_size = 1;
3853
3854         cm_node->apbvt_set = apbvt_set;
3855         cm_node->qhash_set = true;
3856         iwqp->cm_node = cm_node;
3857         cm_node->iwqp = iwqp;
3858         iwqp->cm_id = cm_id;
3859         i40iw_add_ref(&iwqp->ibqp);
3860         return 0;
3861 }
3862
3863 /**
3864  * i40iw_create_listen - registered call creating listener
3865  * @cm_id: cm information for passive connection
3866  * @backlog: to max accept pending count
3867  */
3868 int i40iw_create_listen(struct iw_cm_id *cm_id, int backlog)
3869 {
3870         struct i40iw_device *iwdev;
3871         struct i40iw_cm_listener *cm_listen_node;
3872         struct i40iw_cm_info cm_info;
3873         enum i40iw_status_code ret;
3874         struct sockaddr_in *laddr;
3875         struct sockaddr_in6 *laddr6;
3876         bool wildcard = false;
3877
3878         iwdev = to_iwdev(cm_id->device);
3879         if (!iwdev)
3880                 return -EINVAL;
3881
3882         laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3883         laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3884         memset(&cm_info, 0, sizeof(cm_info));
3885         if (laddr->sin_family == AF_INET) {
3886                 cm_info.ipv4 = true;
3887                 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
3888                 cm_info.loc_port = ntohs(laddr->sin_port);
3889
3890                 if (laddr->sin_addr.s_addr != INADDR_ANY)
3891                         cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr);
3892                 else
3893                         wildcard = true;
3894
3895         } else {
3896                 cm_info.ipv4 = false;
3897                 i40iw_copy_ip_ntohl(cm_info.loc_addr,
3898                                     laddr6->sin6_addr.in6_u.u6_addr32);
3899                 cm_info.loc_port = ntohs(laddr6->sin6_port);
3900                 if (ipv6_addr_type(&laddr6->sin6_addr) != IPV6_ADDR_ANY)
3901                         i40iw_netdev_vlan_ipv6(cm_info.loc_addr,
3902                                                &cm_info.vlan_id,
3903                                                NULL);
3904                 else
3905                         wildcard = true;
3906         }
3907         cm_info.backlog = backlog;
3908         cm_info.cm_id = cm_id;
3909
3910         cm_listen_node = i40iw_make_listen_node(&iwdev->cm_core, iwdev, &cm_info);
3911         if (!cm_listen_node) {
3912                 i40iw_pr_err("cm_listen_node == NULL\n");
3913                 return -ENOMEM;
3914         }
3915
3916         cm_id->provider_data = cm_listen_node;
3917
3918         if (!cm_listen_node->reused_node) {
3919                 if (wildcard) {
3920                         if (cm_info.ipv4)
3921                                 ret = i40iw_add_mqh_4(iwdev,
3922                                                       &cm_info,
3923                                                       cm_listen_node);
3924                         else
3925                                 ret = i40iw_add_mqh_6(iwdev,
3926                                                       &cm_info,
3927                                                       cm_listen_node);
3928                         if (ret)
3929                                 goto error;
3930
3931                         ret = i40iw_manage_apbvt(iwdev,
3932                                                  cm_info.loc_port,
3933                                                  I40IW_MANAGE_APBVT_ADD);
3934
3935                         if (ret)
3936                                 goto error;
3937                 } else {
3938                         ret = i40iw_manage_qhash(iwdev,
3939                                                  &cm_info,
3940                                                  I40IW_QHASH_TYPE_TCP_SYN,
3941                                                  I40IW_QHASH_MANAGE_TYPE_ADD,
3942                                                  NULL,
3943                                                  true);
3944                         if (ret)
3945                                 goto error;
3946                         cm_listen_node->qhash_set = true;
3947                         ret = i40iw_manage_apbvt(iwdev,
3948                                                  cm_info.loc_port,
3949                                                  I40IW_MANAGE_APBVT_ADD);
3950                         if (ret)
3951                                 goto error;
3952                 }
3953         }
3954         cm_id->add_ref(cm_id);
3955         cm_listen_node->cm_core->stats_listen_created++;
3956         return 0;
3957  error:
3958         i40iw_cm_del_listen(&iwdev->cm_core, (void *)cm_listen_node, false);
3959         return -EINVAL;
3960 }
3961
3962 /**
3963  * i40iw_destroy_listen - registered call to destroy listener
3964  * @cm_id: cm information for passive connection
3965  */
3966 int i40iw_destroy_listen(struct iw_cm_id *cm_id)
3967 {
3968         struct i40iw_device *iwdev;
3969
3970         iwdev = to_iwdev(cm_id->device);
3971         if (cm_id->provider_data)
3972                 i40iw_cm_del_listen(&iwdev->cm_core, cm_id->provider_data, true);
3973         else
3974                 i40iw_pr_err("cm_id->provider_data was NULL\n");
3975
3976         cm_id->rem_ref(cm_id);
3977
3978         return 0;
3979 }
3980
3981 /**
3982  * i40iw_cm_event_connected - handle connected active node
3983  * @event: the info for cm_node of connection
3984  */
3985 static void i40iw_cm_event_connected(struct i40iw_cm_event *event)
3986 {
3987         struct i40iw_qp *iwqp;
3988         struct i40iw_device *iwdev;
3989         struct i40iw_cm_node *cm_node;
3990         struct i40iw_sc_dev *dev;
3991         struct ib_qp_attr attr;
3992         struct iw_cm_id *cm_id;
3993         int status;
3994         bool read0;
3995
3996         cm_node = event->cm_node;
3997         cm_id = cm_node->cm_id;
3998         iwqp = (struct i40iw_qp *)cm_id->provider_data;
3999         iwdev = to_iwdev(iwqp->ibqp.device);
4000         dev = &iwdev->sc_dev;
4001
4002         if (iwqp->destroyed) {
4003                 status = -ETIMEDOUT;
4004                 goto error;
4005         }
4006         i40iw_cm_init_tsa_conn(iwqp, cm_node);
4007         read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO);
4008         if (iwqp->page)
4009                 iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
4010         dev->iw_priv_qp_ops->qp_send_rtt(&iwqp->sc_qp, read0);
4011         if (iwqp->page)
4012                 kunmap(iwqp->page);
4013         status = i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 0);
4014         if (status)
4015                 i40iw_pr_err("send cm event\n");
4016
4017         memset(&attr, 0, sizeof(attr));
4018         attr.qp_state = IB_QPS_RTS;
4019         cm_node->qhash_set = false;
4020         i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
4021
4022         cm_node->accelerated = 1;
4023         if (cm_node->accept_pend) {
4024                 if (!cm_node->listener)
4025                         i40iw_pr_err("listener is null for passive node\n");
4026                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
4027                 cm_node->accept_pend = 0;
4028         }
4029         return;
4030
4031 error:
4032         iwqp->cm_id = NULL;
4033         cm_id->provider_data = NULL;
4034         i40iw_send_cm_event(event->cm_node,
4035                             cm_id,
4036                             IW_CM_EVENT_CONNECT_REPLY,
4037                             status);
4038         cm_id->rem_ref(cm_id);
4039         i40iw_rem_ref_cm_node(event->cm_node);
4040 }
4041
4042 /**
4043  * i40iw_cm_event_reset - handle reset
4044  * @event: the info for cm_node of connection
4045  */
4046 static void i40iw_cm_event_reset(struct i40iw_cm_event *event)
4047 {
4048         struct i40iw_cm_node *cm_node = event->cm_node;
4049         struct iw_cm_id   *cm_id = cm_node->cm_id;
4050         struct i40iw_qp *iwqp;
4051
4052         if (!cm_id)
4053                 return;
4054
4055         iwqp = cm_id->provider_data;
4056         if (!iwqp)
4057                 return;
4058
4059         i40iw_debug(cm_node->dev,
4060                     I40IW_DEBUG_CM,
4061                     "reset event %p - cm_id = %p\n",
4062                      event->cm_node, cm_id);
4063         iwqp->cm_id = NULL;
4064
4065         i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT, -ECONNRESET);
4066         i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0);
4067 }
4068
4069 /**
4070  * i40iw_cm_event_handler - worker thread callback to send event to cm upper layer
4071  * @work: pointer of cm event info.
4072  */
4073 static void i40iw_cm_event_handler(struct work_struct *work)
4074 {
4075         struct i40iw_cm_event *event = container_of(work,
4076                                                     struct i40iw_cm_event,
4077                                                     event_work);
4078         struct i40iw_cm_node *cm_node;
4079
4080         if (!event || !event->cm_node || !event->cm_node->cm_core)
4081                 return;
4082
4083         cm_node = event->cm_node;
4084
4085         switch (event->type) {
4086         case I40IW_CM_EVENT_MPA_REQ:
4087                 i40iw_send_cm_event(cm_node,
4088                                     cm_node->cm_id,
4089                                     IW_CM_EVENT_CONNECT_REQUEST,
4090                                     0);
4091                 break;
4092         case I40IW_CM_EVENT_RESET:
4093                 i40iw_cm_event_reset(event);
4094                 break;
4095         case I40IW_CM_EVENT_CONNECTED:
4096                 if (!event->cm_node->cm_id ||
4097                     (event->cm_node->state != I40IW_CM_STATE_OFFLOADED))
4098                         break;
4099                 i40iw_cm_event_connected(event);
4100                 break;
4101         case I40IW_CM_EVENT_MPA_REJECT:
4102                 if (!event->cm_node->cm_id ||
4103                     (cm_node->state == I40IW_CM_STATE_OFFLOADED))
4104                         break;
4105                 i40iw_send_cm_event(cm_node,
4106                                     cm_node->cm_id,
4107                                     IW_CM_EVENT_CONNECT_REPLY,
4108                                     -ECONNREFUSED);
4109                 break;
4110         case I40IW_CM_EVENT_ABORTED:
4111                 if (!event->cm_node->cm_id ||
4112                     (event->cm_node->state == I40IW_CM_STATE_OFFLOADED))
4113                         break;
4114                 i40iw_event_connect_error(event);
4115                 break;
4116         default:
4117                 i40iw_pr_err("event type = %d\n", event->type);
4118                 break;
4119         }
4120
4121         event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
4122         i40iw_rem_ref_cm_node(event->cm_node);
4123         kfree(event);
4124 }
4125
4126 /**
4127  * i40iw_cm_post_event - queue event request for worker thread
4128  * @event: cm node's info for up event call
4129  */
4130 static void i40iw_cm_post_event(struct i40iw_cm_event *event)
4131 {
4132         atomic_inc(&event->cm_node->ref_count);
4133         event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
4134         INIT_WORK(&event->event_work, i40iw_cm_event_handler);
4135
4136         queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
4137 }