1 // SPDX-License-Identifier: GPL-2.0 or Linux-OpenIB 2 /* Copyright (c) 2015 - 2021 Intel Corporation */ 3 #include "main.h" 4 #include "trace.h" 5 6 static void irdma_cm_post_event(struct irdma_cm_event *event); 7 static void irdma_disconnect_worker(struct work_struct *work); 8 9 /** 10 * irdma_free_sqbuf - put back puda buffer if refcount is 0 11 * @vsi: The VSI structure of the device 12 * @bufp: puda buffer to free 13 */ 14 void irdma_free_sqbuf(struct irdma_sc_vsi *vsi, void *bufp) 15 { 16 struct irdma_puda_buf *buf = bufp; 17 struct irdma_puda_rsrc *ilq = vsi->ilq; 18 19 if (refcount_dec_and_test(&buf->refcount)) 20 irdma_puda_ret_bufpool(ilq, buf); 21 } 22 23 /** 24 * irdma_record_ird_ord - Record IRD/ORD passed in 25 * @cm_node: connection's node 26 * @conn_ird: connection IRD 27 * @conn_ord: connection ORD 28 */ 29 static void irdma_record_ird_ord(struct irdma_cm_node *cm_node, u32 conn_ird, 30 u32 conn_ord) 31 { 32 if (conn_ird > cm_node->dev->hw_attrs.max_hw_ird) 33 conn_ird = cm_node->dev->hw_attrs.max_hw_ird; 34 35 if (conn_ord > cm_node->dev->hw_attrs.max_hw_ord) 36 conn_ord = cm_node->dev->hw_attrs.max_hw_ord; 37 else if (!conn_ord && cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO) 38 conn_ord = 1; 39 cm_node->ird_size = conn_ird; 40 cm_node->ord_size = conn_ord; 41 } 42 43 /** 44 * irdma_copy_ip_ntohl - copy IP address from network to host 45 * @dst: IP address in host order 46 * @src: IP address in network order (big endian) 47 */ 48 void irdma_copy_ip_ntohl(u32 *dst, __be32 *src) 49 { 50 *dst++ = ntohl(*src++); 51 *dst++ = ntohl(*src++); 52 *dst++ = ntohl(*src++); 53 *dst = ntohl(*src); 54 } 55 56 /** 57 * irdma_copy_ip_htonl - copy IP address from host to network order 58 * @dst: IP address in network order (big endian) 59 * @src: IP address in host order 60 */ 61 void irdma_copy_ip_htonl(__be32 *dst, u32 *src) 62 { 63 *dst++ = htonl(*src++); 64 *dst++ = htonl(*src++); 65 *dst++ = htonl(*src++); 66 *dst = htonl(*src); 67 } 68 69 /** 70 * irdma_get_addr_info 71 * @cm_node: contains ip/tcp info 72 * @cm_info: to get a copy of the cm_node ip/tcp info 73 */ 74 static void irdma_get_addr_info(struct irdma_cm_node *cm_node, 75 struct irdma_cm_info *cm_info) 76 { 77 memset(cm_info, 0, sizeof(*cm_info)); 78 cm_info->ipv4 = cm_node->ipv4; 79 cm_info->vlan_id = cm_node->vlan_id; 80 memcpy(cm_info->loc_addr, cm_node->loc_addr, sizeof(cm_info->loc_addr)); 81 memcpy(cm_info->rem_addr, cm_node->rem_addr, sizeof(cm_info->rem_addr)); 82 cm_info->loc_port = cm_node->loc_port; 83 cm_info->rem_port = cm_node->rem_port; 84 } 85 86 /** 87 * irdma_fill_sockaddr4 - fill in addr info for IPv4 connection 88 * @cm_node: connection's node 89 * @event: upper layer's cm event 90 */ 91 static inline void irdma_fill_sockaddr4(struct irdma_cm_node *cm_node, 92 struct iw_cm_event *event) 93 { 94 struct sockaddr_in *laddr = (struct sockaddr_in *)&event->local_addr; 95 struct sockaddr_in *raddr = (struct sockaddr_in *)&event->remote_addr; 96 97 laddr->sin_family = AF_INET; 98 raddr->sin_family = AF_INET; 99 100 laddr->sin_port = htons(cm_node->loc_port); 101 raddr->sin_port = htons(cm_node->rem_port); 102 103 laddr->sin_addr.s_addr = htonl(cm_node->loc_addr[0]); 104 raddr->sin_addr.s_addr = htonl(cm_node->rem_addr[0]); 105 } 106 107 /** 108 * irdma_fill_sockaddr6 - fill in addr info for IPv6 connection 109 * @cm_node: connection's node 110 * @event: upper layer's cm event 111 */ 112 static inline void irdma_fill_sockaddr6(struct irdma_cm_node *cm_node, 113 struct iw_cm_event *event) 114 { 115 struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)&event->local_addr; 116 struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)&event->remote_addr; 117 118 laddr6->sin6_family = AF_INET6; 119 raddr6->sin6_family = AF_INET6; 120 121 laddr6->sin6_port = htons(cm_node->loc_port); 122 raddr6->sin6_port = htons(cm_node->rem_port); 123 124 irdma_copy_ip_htonl(laddr6->sin6_addr.in6_u.u6_addr32, 125 cm_node->loc_addr); 126 irdma_copy_ip_htonl(raddr6->sin6_addr.in6_u.u6_addr32, 127 cm_node->rem_addr); 128 } 129 130 /** 131 * irdma_get_cmevent_info - for cm event upcall 132 * @cm_node: connection's node 133 * @cm_id: upper layers cm struct for the event 134 * @event: upper layer's cm event 135 */ 136 static inline void irdma_get_cmevent_info(struct irdma_cm_node *cm_node, 137 struct iw_cm_id *cm_id, 138 struct iw_cm_event *event) 139 { 140 memcpy(&event->local_addr, &cm_id->m_local_addr, 141 sizeof(event->local_addr)); 142 memcpy(&event->remote_addr, &cm_id->m_remote_addr, 143 sizeof(event->remote_addr)); 144 if (cm_node) { 145 event->private_data = cm_node->pdata_buf; 146 event->private_data_len = (u8)cm_node->pdata.size; 147 event->ird = cm_node->ird_size; 148 event->ord = cm_node->ord_size; 149 } 150 } 151 152 /** 153 * irdma_send_cm_event - upcall cm's event handler 154 * @cm_node: connection's node 155 * @cm_id: upper layer's cm info struct 156 * @type: Event type to indicate 157 * @status: status for the event type 158 */ 159 static int irdma_send_cm_event(struct irdma_cm_node *cm_node, 160 struct iw_cm_id *cm_id, 161 enum iw_cm_event_type type, int status) 162 { 163 struct iw_cm_event event = {}; 164 165 event.event = type; 166 event.status = status; 167 trace_irdma_send_cm_event(cm_node, cm_id, type, status, 168 __builtin_return_address(0)); 169 170 ibdev_dbg(&cm_node->iwdev->ibdev, 171 "CM: cm_node %p cm_id=%p state=%d accel=%d event_type=%d status=%d\n", 172 cm_node, cm_id, cm_node->accelerated, cm_node->state, type, 173 status); 174 175 switch (type) { 176 case IW_CM_EVENT_CONNECT_REQUEST: 177 if (cm_node->ipv4) 178 irdma_fill_sockaddr4(cm_node, &event); 179 else 180 irdma_fill_sockaddr6(cm_node, &event); 181 event.provider_data = cm_node; 182 event.private_data = cm_node->pdata_buf; 183 event.private_data_len = (u8)cm_node->pdata.size; 184 event.ird = cm_node->ird_size; 185 break; 186 case IW_CM_EVENT_CONNECT_REPLY: 187 irdma_get_cmevent_info(cm_node, cm_id, &event); 188 break; 189 case IW_CM_EVENT_ESTABLISHED: 190 event.ird = cm_node->ird_size; 191 event.ord = cm_node->ord_size; 192 break; 193 case IW_CM_EVENT_DISCONNECT: 194 case IW_CM_EVENT_CLOSE: 195 /* Wait if we are in RTS but havent issued the iwcm event upcall */ 196 if (!cm_node->accelerated) 197 wait_for_completion(&cm_node->establish_comp); 198 break; 199 default: 200 return -EINVAL; 201 } 202 203 return cm_id->event_handler(cm_id, &event); 204 } 205 206 /** 207 * irdma_timer_list_prep - add connection nodes to a list to perform timer tasks 208 * @cm_core: cm's core 209 * @timer_list: a timer list to which cm_node will be selected 210 */ 211 static void irdma_timer_list_prep(struct irdma_cm_core *cm_core, 212 struct list_head *timer_list) 213 { 214 struct irdma_cm_node *cm_node; 215 int bkt; 216 217 hash_for_each_rcu(cm_core->cm_hash_tbl, bkt, cm_node, list) { 218 if ((cm_node->close_entry || cm_node->send_entry) && 219 refcount_inc_not_zero(&cm_node->refcnt)) 220 list_add(&cm_node->timer_entry, timer_list); 221 } 222 } 223 224 /** 225 * irdma_create_event - create cm event 226 * @cm_node: connection's node 227 * @type: Event type to generate 228 */ 229 static struct irdma_cm_event *irdma_create_event(struct irdma_cm_node *cm_node, 230 enum irdma_cm_event_type type) 231 { 232 struct irdma_cm_event *event; 233 234 if (!cm_node->cm_id) 235 return NULL; 236 237 event = kzalloc(sizeof(*event), GFP_ATOMIC); 238 239 if (!event) 240 return NULL; 241 242 event->type = type; 243 event->cm_node = cm_node; 244 memcpy(event->cm_info.rem_addr, cm_node->rem_addr, 245 sizeof(event->cm_info.rem_addr)); 246 memcpy(event->cm_info.loc_addr, cm_node->loc_addr, 247 sizeof(event->cm_info.loc_addr)); 248 event->cm_info.rem_port = cm_node->rem_port; 249 event->cm_info.loc_port = cm_node->loc_port; 250 event->cm_info.cm_id = cm_node->cm_id; 251 ibdev_dbg(&cm_node->iwdev->ibdev, 252 "CM: node=%p event=%p type=%u dst=%pI4 src=%pI4\n", cm_node, 253 event, type, event->cm_info.loc_addr, 254 event->cm_info.rem_addr); 255 trace_irdma_create_event(cm_node, type, __builtin_return_address(0)); 256 irdma_cm_post_event(event); 257 258 return event; 259 } 260 261 /** 262 * irdma_free_retrans_entry - free send entry 263 * @cm_node: connection's node 264 */ 265 static void irdma_free_retrans_entry(struct irdma_cm_node *cm_node) 266 { 267 struct irdma_device *iwdev = cm_node->iwdev; 268 struct irdma_timer_entry *send_entry; 269 270 send_entry = cm_node->send_entry; 271 if (!send_entry) 272 return; 273 274 cm_node->send_entry = NULL; 275 irdma_free_sqbuf(&iwdev->vsi, send_entry->sqbuf); 276 kfree(send_entry); 277 refcount_dec(&cm_node->refcnt); 278 } 279 280 /** 281 * irdma_cleanup_retrans_entry - free send entry with lock 282 * @cm_node: connection's node 283 */ 284 static void irdma_cleanup_retrans_entry(struct irdma_cm_node *cm_node) 285 { 286 unsigned long flags; 287 288 spin_lock_irqsave(&cm_node->retrans_list_lock, flags); 289 irdma_free_retrans_entry(cm_node); 290 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); 291 } 292 293 /** 294 * irdma_form_ah_cm_frame - get a free packet and build frame with address handle 295 * @cm_node: connection's node ionfo to use in frame 296 * @options: pointer to options info 297 * @hdr: pointer mpa header 298 * @pdata: pointer to private data 299 * @flags: indicates FIN or ACK 300 */ 301 static struct irdma_puda_buf *irdma_form_ah_cm_frame(struct irdma_cm_node *cm_node, 302 struct irdma_kmem_info *options, 303 struct irdma_kmem_info *hdr, 304 struct irdma_mpa_priv_info *pdata, 305 u8 flags) 306 { 307 struct irdma_puda_buf *sqbuf; 308 struct irdma_sc_vsi *vsi = &cm_node->iwdev->vsi; 309 u8 *buf; 310 struct tcphdr *tcph; 311 u16 pktsize; 312 u32 opts_len = 0; 313 u32 pd_len = 0; 314 u32 hdr_len = 0; 315 316 if (!cm_node->ah || !cm_node->ah->ah_info.ah_valid) { 317 ibdev_dbg(&cm_node->iwdev->ibdev, "CM: AH invalid\n"); 318 return NULL; 319 } 320 321 sqbuf = irdma_puda_get_bufpool(vsi->ilq); 322 if (!sqbuf) { 323 ibdev_dbg(&cm_node->iwdev->ibdev, "CM: SQ buf NULL\n"); 324 return NULL; 325 } 326 327 sqbuf->ah_id = cm_node->ah->ah_info.ah_idx; 328 buf = sqbuf->mem.va; 329 if (options) 330 opts_len = (u32)options->size; 331 332 if (hdr) 333 hdr_len = hdr->size; 334 335 if (pdata) 336 pd_len = pdata->size; 337 338 pktsize = sizeof(*tcph) + opts_len + hdr_len + pd_len; 339 340 memset(buf, 0, sizeof(*tcph)); 341 342 sqbuf->totallen = pktsize; 343 sqbuf->tcphlen = sizeof(*tcph) + opts_len; 344 sqbuf->scratch = cm_node; 345 346 tcph = (struct tcphdr *)buf; 347 buf += sizeof(*tcph); 348 349 tcph->source = htons(cm_node->loc_port); 350 tcph->dest = htons(cm_node->rem_port); 351 tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num); 352 353 if (flags & SET_ACK) { 354 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt; 355 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num); 356 tcph->ack = 1; 357 } else { 358 tcph->ack_seq = 0; 359 } 360 361 if (flags & SET_SYN) { 362 cm_node->tcp_cntxt.loc_seq_num++; 363 tcph->syn = 1; 364 } else { 365 cm_node->tcp_cntxt.loc_seq_num += hdr_len + pd_len; 366 } 367 368 if (flags & SET_FIN) { 369 cm_node->tcp_cntxt.loc_seq_num++; 370 tcph->fin = 1; 371 } 372 373 if (flags & SET_RST) 374 tcph->rst = 1; 375 376 tcph->doff = (u16)((sizeof(*tcph) + opts_len + 3) >> 2); 377 sqbuf->tcphlen = tcph->doff << 2; 378 tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd); 379 tcph->urg_ptr = 0; 380 381 if (opts_len) { 382 memcpy(buf, options->addr, opts_len); 383 buf += opts_len; 384 } 385 386 if (hdr_len) { 387 memcpy(buf, hdr->addr, hdr_len); 388 buf += hdr_len; 389 } 390 391 if (pdata && pdata->addr) 392 memcpy(buf, pdata->addr, pdata->size); 393 394 refcount_set(&sqbuf->refcount, 1); 395 396 print_hex_dump_debug("ILQ: TRANSMIT ILQ BUFFER", DUMP_PREFIX_OFFSET, 397 16, 8, sqbuf->mem.va, sqbuf->totallen, false); 398 399 return sqbuf; 400 } 401 402 /** 403 * irdma_form_uda_cm_frame - get a free packet and build frame full tcpip packet 404 * @cm_node: connection's node ionfo to use in frame 405 * @options: pointer to options info 406 * @hdr: pointer mpa header 407 * @pdata: pointer to private data 408 * @flags: indicates FIN or ACK 409 */ 410 static struct irdma_puda_buf *irdma_form_uda_cm_frame(struct irdma_cm_node *cm_node, 411 struct irdma_kmem_info *options, 412 struct irdma_kmem_info *hdr, 413 struct irdma_mpa_priv_info *pdata, 414 u8 flags) 415 { 416 struct irdma_puda_buf *sqbuf; 417 struct irdma_sc_vsi *vsi = &cm_node->iwdev->vsi; 418 u8 *buf; 419 420 struct tcphdr *tcph; 421 struct iphdr *iph; 422 struct ipv6hdr *ip6h; 423 struct ethhdr *ethh; 424 u16 pktsize; 425 u16 eth_hlen = ETH_HLEN; 426 u32 opts_len = 0; 427 u32 pd_len = 0; 428 u32 hdr_len = 0; 429 430 u16 vtag; 431 432 sqbuf = irdma_puda_get_bufpool(vsi->ilq); 433 if (!sqbuf) 434 return NULL; 435 436 buf = sqbuf->mem.va; 437 438 if (options) 439 opts_len = (u32)options->size; 440 441 if (hdr) 442 hdr_len = hdr->size; 443 444 if (pdata) 445 pd_len = pdata->size; 446 447 if (cm_node->vlan_id < VLAN_N_VID) 448 eth_hlen += 4; 449 450 if (cm_node->ipv4) 451 pktsize = sizeof(*iph) + sizeof(*tcph); 452 else 453 pktsize = sizeof(*ip6h) + sizeof(*tcph); 454 pktsize += opts_len + hdr_len + pd_len; 455 456 memset(buf, 0, eth_hlen + pktsize); 457 458 sqbuf->totallen = pktsize + eth_hlen; 459 sqbuf->maclen = eth_hlen; 460 sqbuf->tcphlen = sizeof(*tcph) + opts_len; 461 sqbuf->scratch = cm_node; 462 463 ethh = (struct ethhdr *)buf; 464 buf += eth_hlen; 465 466 if (cm_node->do_lpb) 467 sqbuf->do_lpb = true; 468 469 if (cm_node->ipv4) { 470 sqbuf->ipv4 = true; 471 472 iph = (struct iphdr *)buf; 473 buf += sizeof(*iph); 474 tcph = (struct tcphdr *)buf; 475 buf += sizeof(*tcph); 476 477 ether_addr_copy(ethh->h_dest, cm_node->rem_mac); 478 ether_addr_copy(ethh->h_source, cm_node->loc_mac); 479 if (cm_node->vlan_id < VLAN_N_VID) { 480 ((struct vlan_ethhdr *)ethh)->h_vlan_proto = 481 htons(ETH_P_8021Q); 482 vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) | 483 cm_node->vlan_id; 484 ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(vtag); 485 486 ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = 487 htons(ETH_P_IP); 488 } else { 489 ethh->h_proto = htons(ETH_P_IP); 490 } 491 492 iph->version = IPVERSION; 493 iph->ihl = 5; /* 5 * 4Byte words, IP headr len */ 494 iph->tos = cm_node->tos; 495 iph->tot_len = htons(pktsize); 496 iph->id = htons(++cm_node->tcp_cntxt.loc_id); 497 498 iph->frag_off = htons(0x4000); 499 iph->ttl = 0x40; 500 iph->protocol = IPPROTO_TCP; 501 iph->saddr = htonl(cm_node->loc_addr[0]); 502 iph->daddr = htonl(cm_node->rem_addr[0]); 503 } else { 504 sqbuf->ipv4 = false; 505 ip6h = (struct ipv6hdr *)buf; 506 buf += sizeof(*ip6h); 507 tcph = (struct tcphdr *)buf; 508 buf += sizeof(*tcph); 509 510 ether_addr_copy(ethh->h_dest, cm_node->rem_mac); 511 ether_addr_copy(ethh->h_source, cm_node->loc_mac); 512 if (cm_node->vlan_id < VLAN_N_VID) { 513 ((struct vlan_ethhdr *)ethh)->h_vlan_proto = 514 htons(ETH_P_8021Q); 515 vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) | 516 cm_node->vlan_id; 517 ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(vtag); 518 ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = 519 htons(ETH_P_IPV6); 520 } else { 521 ethh->h_proto = htons(ETH_P_IPV6); 522 } 523 ip6h->version = 6; 524 ip6h->priority = cm_node->tos >> 4; 525 ip6h->flow_lbl[0] = cm_node->tos << 4; 526 ip6h->flow_lbl[1] = 0; 527 ip6h->flow_lbl[2] = 0; 528 ip6h->payload_len = htons(pktsize - sizeof(*ip6h)); 529 ip6h->nexthdr = 6; 530 ip6h->hop_limit = 128; 531 irdma_copy_ip_htonl(ip6h->saddr.in6_u.u6_addr32, 532 cm_node->loc_addr); 533 irdma_copy_ip_htonl(ip6h->daddr.in6_u.u6_addr32, 534 cm_node->rem_addr); 535 } 536 537 tcph->source = htons(cm_node->loc_port); 538 tcph->dest = htons(cm_node->rem_port); 539 tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num); 540 541 if (flags & SET_ACK) { 542 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt; 543 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num); 544 tcph->ack = 1; 545 } else { 546 tcph->ack_seq = 0; 547 } 548 549 if (flags & SET_SYN) { 550 cm_node->tcp_cntxt.loc_seq_num++; 551 tcph->syn = 1; 552 } else { 553 cm_node->tcp_cntxt.loc_seq_num += hdr_len + pd_len; 554 } 555 556 if (flags & SET_FIN) { 557 cm_node->tcp_cntxt.loc_seq_num++; 558 tcph->fin = 1; 559 } 560 561 if (flags & SET_RST) 562 tcph->rst = 1; 563 564 tcph->doff = (u16)((sizeof(*tcph) + opts_len + 3) >> 2); 565 sqbuf->tcphlen = tcph->doff << 2; 566 tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd); 567 tcph->urg_ptr = 0; 568 569 if (opts_len) { 570 memcpy(buf, options->addr, opts_len); 571 buf += opts_len; 572 } 573 574 if (hdr_len) { 575 memcpy(buf, hdr->addr, hdr_len); 576 buf += hdr_len; 577 } 578 579 if (pdata && pdata->addr) 580 memcpy(buf, pdata->addr, pdata->size); 581 582 refcount_set(&sqbuf->refcount, 1); 583 584 print_hex_dump_debug("ILQ: TRANSMIT ILQ BUFFER", DUMP_PREFIX_OFFSET, 585 16, 8, sqbuf->mem.va, sqbuf->totallen, false); 586 return sqbuf; 587 } 588 589 /** 590 * irdma_send_reset - Send RST packet 591 * @cm_node: connection's node 592 */ 593 int irdma_send_reset(struct irdma_cm_node *cm_node) 594 { 595 struct irdma_puda_buf *sqbuf; 596 int flags = SET_RST | SET_ACK; 597 598 trace_irdma_send_reset(cm_node, 0, __builtin_return_address(0)); 599 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, NULL, NULL, 600 flags); 601 if (!sqbuf) 602 return -ENOMEM; 603 604 ibdev_dbg(&cm_node->iwdev->ibdev, 605 "CM: caller: %pS cm_node %p cm_id=%p accel=%d state=%d rem_port=0x%04x, loc_port=0x%04x rem_addr=%pI4 loc_addr=%pI4\n", 606 __builtin_return_address(0), cm_node, cm_node->cm_id, 607 cm_node->accelerated, cm_node->state, cm_node->rem_port, 608 cm_node->loc_port, cm_node->rem_addr, cm_node->loc_addr); 609 610 return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 0, 611 1); 612 } 613 614 /** 615 * irdma_active_open_err - send event for active side cm error 616 * @cm_node: connection's node 617 * @reset: Flag to send reset or not 618 */ 619 static void irdma_active_open_err(struct irdma_cm_node *cm_node, bool reset) 620 { 621 trace_irdma_active_open_err(cm_node, reset, 622 __builtin_return_address(0)); 623 irdma_cleanup_retrans_entry(cm_node); 624 cm_node->cm_core->stats_connect_errs++; 625 if (reset) { 626 ibdev_dbg(&cm_node->iwdev->ibdev, 627 "CM: cm_node=%p state=%d\n", cm_node, 628 cm_node->state); 629 refcount_inc(&cm_node->refcnt); 630 irdma_send_reset(cm_node); 631 } 632 633 cm_node->state = IRDMA_CM_STATE_CLOSED; 634 irdma_create_event(cm_node, IRDMA_CM_EVENT_ABORTED); 635 } 636 637 /** 638 * irdma_passive_open_err - handle passive side cm error 639 * @cm_node: connection's node 640 * @reset: send reset or just free cm_node 641 */ 642 static void irdma_passive_open_err(struct irdma_cm_node *cm_node, bool reset) 643 { 644 irdma_cleanup_retrans_entry(cm_node); 645 cm_node->cm_core->stats_passive_errs++; 646 cm_node->state = IRDMA_CM_STATE_CLOSED; 647 ibdev_dbg(&cm_node->iwdev->ibdev, "CM: cm_node=%p state =%d\n", 648 cm_node, cm_node->state); 649 trace_irdma_passive_open_err(cm_node, reset, 650 __builtin_return_address(0)); 651 if (reset) 652 irdma_send_reset(cm_node); 653 else 654 irdma_rem_ref_cm_node(cm_node); 655 } 656 657 /** 658 * irdma_event_connect_error - to create connect error event 659 * @event: cm information for connect event 660 */ 661 static void irdma_event_connect_error(struct irdma_cm_event *event) 662 { 663 struct irdma_qp *iwqp; 664 struct iw_cm_id *cm_id; 665 666 cm_id = event->cm_node->cm_id; 667 if (!cm_id) 668 return; 669 670 iwqp = cm_id->provider_data; 671 672 if (!iwqp || !iwqp->iwdev) 673 return; 674 675 iwqp->cm_id = NULL; 676 cm_id->provider_data = NULL; 677 irdma_send_cm_event(event->cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 678 -ECONNRESET); 679 irdma_rem_ref_cm_node(event->cm_node); 680 } 681 682 /** 683 * irdma_process_options - process options from TCP header 684 * @cm_node: connection's node 685 * @optionsloc: point to start of options 686 * @optionsize: size of all options 687 * @syn_pkt: flag if syn packet 688 */ 689 static int irdma_process_options(struct irdma_cm_node *cm_node, u8 *optionsloc, 690 u32 optionsize, u32 syn_pkt) 691 { 692 u32 tmp; 693 u32 offset = 0; 694 union all_known_options *all_options; 695 char got_mss_option = 0; 696 697 while (offset < optionsize) { 698 all_options = (union all_known_options *)(optionsloc + offset); 699 switch (all_options->base.optionnum) { 700 case OPTION_NUM_EOL: 701 offset = optionsize; 702 break; 703 case OPTION_NUM_NONE: 704 offset += 1; 705 continue; 706 case OPTION_NUM_MSS: 707 ibdev_dbg(&cm_node->iwdev->ibdev, 708 "CM: MSS Length: %d Offset: %d Size: %d\n", 709 all_options->mss.len, offset, optionsize); 710 got_mss_option = 1; 711 if (all_options->mss.len != 4) 712 return -EINVAL; 713 tmp = ntohs(all_options->mss.mss); 714 if ((cm_node->ipv4 && 715 (tmp + IRDMA_MTU_TO_MSS_IPV4) < IRDMA_MIN_MTU_IPV4) || 716 (!cm_node->ipv4 && 717 (tmp + IRDMA_MTU_TO_MSS_IPV6) < IRDMA_MIN_MTU_IPV6)) 718 return -EINVAL; 719 if (tmp < cm_node->tcp_cntxt.mss) 720 cm_node->tcp_cntxt.mss = tmp; 721 break; 722 case OPTION_NUM_WINDOW_SCALE: 723 cm_node->tcp_cntxt.snd_wscale = 724 all_options->windowscale.shiftcount; 725 break; 726 default: 727 ibdev_dbg(&cm_node->iwdev->ibdev, 728 "CM: Unsupported TCP Option: %x\n", 729 all_options->base.optionnum); 730 break; 731 } 732 offset += all_options->base.len; 733 } 734 if (!got_mss_option && syn_pkt) 735 cm_node->tcp_cntxt.mss = IRDMA_CM_DEFAULT_MSS; 736 737 return 0; 738 } 739 740 /** 741 * irdma_handle_tcp_options - setup TCP context info after parsing TCP options 742 * @cm_node: connection's node 743 * @tcph: pointer tcp header 744 * @optionsize: size of options rcvd 745 * @passive: active or passive flag 746 */ 747 static int irdma_handle_tcp_options(struct irdma_cm_node *cm_node, 748 struct tcphdr *tcph, int optionsize, 749 int passive) 750 { 751 u8 *optionsloc = (u8 *)&tcph[1]; 752 int ret; 753 754 if (optionsize) { 755 ret = irdma_process_options(cm_node, optionsloc, optionsize, 756 (u32)tcph->syn); 757 if (ret) { 758 ibdev_dbg(&cm_node->iwdev->ibdev, 759 "CM: Node %p, Sending Reset\n", cm_node); 760 if (passive) 761 irdma_passive_open_err(cm_node, true); 762 else 763 irdma_active_open_err(cm_node, true); 764 return ret; 765 } 766 } 767 768 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) 769 << cm_node->tcp_cntxt.snd_wscale; 770 771 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd) 772 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd; 773 774 return 0; 775 } 776 777 /** 778 * irdma_build_mpa_v1 - build a MPA V1 frame 779 * @cm_node: connection's node 780 * @start_addr: address where to build frame 781 * @mpa_key: to do read0 or write0 782 */ 783 static void irdma_build_mpa_v1(struct irdma_cm_node *cm_node, void *start_addr, 784 u8 mpa_key) 785 { 786 struct ietf_mpa_v1 *mpa_frame = start_addr; 787 788 switch (mpa_key) { 789 case MPA_KEY_REQUEST: 790 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE); 791 break; 792 case MPA_KEY_REPLY: 793 memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE); 794 break; 795 default: 796 break; 797 } 798 mpa_frame->flags = IETF_MPA_FLAGS_CRC; 799 mpa_frame->rev = cm_node->mpa_frame_rev; 800 mpa_frame->priv_data_len = htons(cm_node->pdata.size); 801 } 802 803 /** 804 * irdma_build_mpa_v2 - build a MPA V2 frame 805 * @cm_node: connection's node 806 * @start_addr: buffer start address 807 * @mpa_key: to do read0 or write0 808 */ 809 static void irdma_build_mpa_v2(struct irdma_cm_node *cm_node, void *start_addr, 810 u8 mpa_key) 811 { 812 struct ietf_mpa_v2 *mpa_frame = start_addr; 813 struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg; 814 u16 ctrl_ird, ctrl_ord; 815 816 /* initialize the upper 5 bytes of the frame */ 817 irdma_build_mpa_v1(cm_node, start_addr, mpa_key); 818 mpa_frame->flags |= IETF_MPA_V2_FLAG; 819 if (cm_node->iwdev->iw_ooo) { 820 mpa_frame->flags |= IETF_MPA_FLAGS_MARKERS; 821 cm_node->rcv_mark_en = true; 822 } 823 mpa_frame->priv_data_len = cpu_to_be16(be16_to_cpu(mpa_frame->priv_data_len) + 824 IETF_RTR_MSG_SIZE); 825 826 /* initialize RTR msg */ 827 if (cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) { 828 ctrl_ird = IETF_NO_IRD_ORD; 829 ctrl_ord = IETF_NO_IRD_ORD; 830 } else { 831 ctrl_ird = (cm_node->ird_size > IETF_NO_IRD_ORD) ? 832 IETF_NO_IRD_ORD : 833 cm_node->ird_size; 834 ctrl_ord = (cm_node->ord_size > IETF_NO_IRD_ORD) ? 835 IETF_NO_IRD_ORD : 836 cm_node->ord_size; 837 } 838 ctrl_ird |= IETF_PEER_TO_PEER; 839 840 switch (mpa_key) { 841 case MPA_KEY_REQUEST: 842 ctrl_ord |= IETF_RDMA0_WRITE; 843 ctrl_ord |= IETF_RDMA0_READ; 844 break; 845 case MPA_KEY_REPLY: 846 switch (cm_node->send_rdma0_op) { 847 case SEND_RDMA_WRITE_ZERO: 848 ctrl_ord |= IETF_RDMA0_WRITE; 849 break; 850 case SEND_RDMA_READ_ZERO: 851 ctrl_ord |= IETF_RDMA0_READ; 852 break; 853 } 854 break; 855 default: 856 break; 857 } 858 rtr_msg->ctrl_ird = htons(ctrl_ird); 859 rtr_msg->ctrl_ord = htons(ctrl_ord); 860 } 861 862 /** 863 * irdma_cm_build_mpa_frame - build mpa frame for mpa version 1 or version 2 864 * @cm_node: connection's node 865 * @mpa: mpa: data buffer 866 * @mpa_key: to do read0 or write0 867 */ 868 static int irdma_cm_build_mpa_frame(struct irdma_cm_node *cm_node, 869 struct irdma_kmem_info *mpa, u8 mpa_key) 870 { 871 int hdr_len = 0; 872 873 switch (cm_node->mpa_frame_rev) { 874 case IETF_MPA_V1: 875 hdr_len = sizeof(struct ietf_mpa_v1); 876 irdma_build_mpa_v1(cm_node, mpa->addr, mpa_key); 877 break; 878 case IETF_MPA_V2: 879 hdr_len = sizeof(struct ietf_mpa_v2); 880 irdma_build_mpa_v2(cm_node, mpa->addr, mpa_key); 881 break; 882 default: 883 break; 884 } 885 886 return hdr_len; 887 } 888 889 /** 890 * irdma_send_mpa_request - active node send mpa request to passive node 891 * @cm_node: connection's node 892 */ 893 static int irdma_send_mpa_request(struct irdma_cm_node *cm_node) 894 { 895 struct irdma_puda_buf *sqbuf; 896 897 cm_node->mpa_hdr.addr = &cm_node->mpa_v2_frame; 898 cm_node->mpa_hdr.size = irdma_cm_build_mpa_frame(cm_node, 899 &cm_node->mpa_hdr, 900 MPA_KEY_REQUEST); 901 if (!cm_node->mpa_hdr.size) { 902 ibdev_dbg(&cm_node->iwdev->ibdev, 903 "CM: mpa size = %d\n", cm_node->mpa_hdr.size); 904 return -EINVAL; 905 } 906 907 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, 908 &cm_node->mpa_hdr, 909 &cm_node->pdata, SET_ACK); 910 if (!sqbuf) 911 return -ENOMEM; 912 913 return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 1, 914 0); 915 } 916 917 /** 918 * irdma_send_mpa_reject - 919 * @cm_node: connection's node 920 * @pdata: reject data for connection 921 * @plen: length of reject data 922 */ 923 static int irdma_send_mpa_reject(struct irdma_cm_node *cm_node, 924 const void *pdata, u8 plen) 925 { 926 struct irdma_puda_buf *sqbuf; 927 struct irdma_mpa_priv_info priv_info; 928 929 cm_node->mpa_hdr.addr = &cm_node->mpa_v2_frame; 930 cm_node->mpa_hdr.size = irdma_cm_build_mpa_frame(cm_node, 931 &cm_node->mpa_hdr, 932 MPA_KEY_REPLY); 933 934 cm_node->mpa_frame.flags |= IETF_MPA_FLAGS_REJECT; 935 priv_info.addr = pdata; 936 priv_info.size = plen; 937 938 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, 939 &cm_node->mpa_hdr, &priv_info, 940 SET_ACK | SET_FIN); 941 if (!sqbuf) 942 return -ENOMEM; 943 944 cm_node->state = IRDMA_CM_STATE_FIN_WAIT1; 945 946 return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 1, 947 0); 948 } 949 950 /** 951 * irdma_negotiate_mpa_v2_ird_ord - negotiate MPAv2 IRD/ORD 952 * @cm_node: connection's node 953 * @buf: Data pointer 954 */ 955 static int irdma_negotiate_mpa_v2_ird_ord(struct irdma_cm_node *cm_node, 956 u8 *buf) 957 { 958 struct ietf_mpa_v2 *mpa_v2_frame; 959 struct ietf_rtr_msg *rtr_msg; 960 u16 ird_size; 961 u16 ord_size; 962 u16 ctrl_ord; 963 u16 ctrl_ird; 964 965 mpa_v2_frame = (struct ietf_mpa_v2 *)buf; 966 rtr_msg = &mpa_v2_frame->rtr_msg; 967 968 /* parse rtr message */ 969 ctrl_ord = ntohs(rtr_msg->ctrl_ord); 970 ctrl_ird = ntohs(rtr_msg->ctrl_ird); 971 ird_size = ctrl_ird & IETF_NO_IRD_ORD; 972 ord_size = ctrl_ord & IETF_NO_IRD_ORD; 973 974 if (!(ctrl_ird & IETF_PEER_TO_PEER)) 975 return -EOPNOTSUPP; 976 977 if (ird_size == IETF_NO_IRD_ORD || ord_size == IETF_NO_IRD_ORD) { 978 cm_node->mpav2_ird_ord = IETF_NO_IRD_ORD; 979 goto negotiate_done; 980 } 981 982 if (cm_node->state != IRDMA_CM_STATE_MPAREQ_SENT) { 983 /* responder */ 984 if (!ord_size && (ctrl_ord & IETF_RDMA0_READ)) 985 cm_node->ird_size = 1; 986 if (cm_node->ord_size > ird_size) 987 cm_node->ord_size = ird_size; 988 } else { 989 /* initiator */ 990 if (!ird_size && (ctrl_ord & IETF_RDMA0_READ)) 991 /* Remote peer doesn't support RDMA0_READ */ 992 return -EOPNOTSUPP; 993 994 if (cm_node->ord_size > ird_size) 995 cm_node->ord_size = ird_size; 996 997 if (cm_node->ird_size < ord_size) 998 /* no resources available */ 999 return -EINVAL; 1000 } 1001 1002 negotiate_done: 1003 if (ctrl_ord & IETF_RDMA0_READ) 1004 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO; 1005 else if (ctrl_ord & IETF_RDMA0_WRITE) 1006 cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO; 1007 else 1008 /* Not supported RDMA0 operation */ 1009 return -EOPNOTSUPP; 1010 1011 ibdev_dbg(&cm_node->iwdev->ibdev, 1012 "CM: MPAV2 Negotiated ORD: %d, IRD: %d\n", 1013 cm_node->ord_size, cm_node->ird_size); 1014 trace_irdma_negotiate_mpa_v2(cm_node); 1015 return 0; 1016 } 1017 1018 /** 1019 * irdma_parse_mpa - process an IETF MPA frame 1020 * @cm_node: connection's node 1021 * @buf: Data pointer 1022 * @type: to return accept or reject 1023 * @len: Len of mpa buffer 1024 */ 1025 static int irdma_parse_mpa(struct irdma_cm_node *cm_node, u8 *buf, u32 *type, 1026 u32 len) 1027 { 1028 struct ietf_mpa_v1 *mpa_frame; 1029 int mpa_hdr_len, priv_data_len, ret; 1030 1031 *type = IRDMA_MPA_REQUEST_ACCEPT; 1032 1033 if (len < sizeof(struct ietf_mpa_v1)) { 1034 ibdev_dbg(&cm_node->iwdev->ibdev, 1035 "CM: ietf buffer small (%x)\n", len); 1036 return -EINVAL; 1037 } 1038 1039 mpa_frame = (struct ietf_mpa_v1 *)buf; 1040 mpa_hdr_len = sizeof(struct ietf_mpa_v1); 1041 priv_data_len = ntohs(mpa_frame->priv_data_len); 1042 1043 if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) { 1044 ibdev_dbg(&cm_node->iwdev->ibdev, 1045 "CM: private_data too big %d\n", priv_data_len); 1046 return -EOVERFLOW; 1047 } 1048 1049 if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) { 1050 ibdev_dbg(&cm_node->iwdev->ibdev, 1051 "CM: unsupported mpa rev = %d\n", mpa_frame->rev); 1052 return -EINVAL; 1053 } 1054 1055 if (mpa_frame->rev > cm_node->mpa_frame_rev) { 1056 ibdev_dbg(&cm_node->iwdev->ibdev, "CM: rev %d\n", 1057 mpa_frame->rev); 1058 return -EINVAL; 1059 } 1060 1061 cm_node->mpa_frame_rev = mpa_frame->rev; 1062 if (cm_node->state != IRDMA_CM_STATE_MPAREQ_SENT) { 1063 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, 1064 IETF_MPA_KEY_SIZE)) { 1065 ibdev_dbg(&cm_node->iwdev->ibdev, 1066 "CM: Unexpected MPA Key received\n"); 1067 return -EINVAL; 1068 } 1069 } else { 1070 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, 1071 IETF_MPA_KEY_SIZE)) { 1072 ibdev_dbg(&cm_node->iwdev->ibdev, 1073 "CM: Unexpected MPA Key received\n"); 1074 return -EINVAL; 1075 } 1076 } 1077 1078 if (priv_data_len + mpa_hdr_len > len) { 1079 ibdev_dbg(&cm_node->iwdev->ibdev, 1080 "CM: ietf buffer len(%x + %x != %x)\n", 1081 priv_data_len, mpa_hdr_len, len); 1082 return -EOVERFLOW; 1083 } 1084 1085 if (len > IRDMA_MAX_CM_BUF) { 1086 ibdev_dbg(&cm_node->iwdev->ibdev, 1087 "CM: ietf buffer large len = %d\n", len); 1088 return -EOVERFLOW; 1089 } 1090 1091 switch (mpa_frame->rev) { 1092 case IETF_MPA_V2: 1093 mpa_hdr_len += IETF_RTR_MSG_SIZE; 1094 ret = irdma_negotiate_mpa_v2_ird_ord(cm_node, buf); 1095 if (ret) 1096 return ret; 1097 break; 1098 case IETF_MPA_V1: 1099 default: 1100 break; 1101 } 1102 1103 memcpy(cm_node->pdata_buf, buf + mpa_hdr_len, priv_data_len); 1104 cm_node->pdata.size = priv_data_len; 1105 1106 if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT) 1107 *type = IRDMA_MPA_REQUEST_REJECT; 1108 1109 if (mpa_frame->flags & IETF_MPA_FLAGS_MARKERS) 1110 cm_node->snd_mark_en = true; 1111 1112 return 0; 1113 } 1114 1115 /** 1116 * irdma_schedule_cm_timer 1117 * @cm_node: connection's node 1118 * @sqbuf: buffer to send 1119 * @type: if it is send or close 1120 * @send_retrans: if rexmits to be done 1121 * @close_when_complete: is cm_node to be removed 1122 * 1123 * note - cm_node needs to be protected before calling this. Encase in: 1124 * irdma_rem_ref_cm_node(cm_core, cm_node); 1125 * irdma_schedule_cm_timer(...) 1126 * refcount_inc(&cm_node->refcnt); 1127 */ 1128 int irdma_schedule_cm_timer(struct irdma_cm_node *cm_node, 1129 struct irdma_puda_buf *sqbuf, 1130 enum irdma_timer_type type, int send_retrans, 1131 int close_when_complete) 1132 { 1133 struct irdma_sc_vsi *vsi = &cm_node->iwdev->vsi; 1134 struct irdma_cm_core *cm_core = cm_node->cm_core; 1135 struct irdma_timer_entry *new_send; 1136 u32 was_timer_set; 1137 unsigned long flags; 1138 1139 new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC); 1140 if (!new_send) { 1141 if (type != IRDMA_TIMER_TYPE_CLOSE) 1142 irdma_free_sqbuf(vsi, sqbuf); 1143 return -ENOMEM; 1144 } 1145 1146 new_send->retrycount = IRDMA_DEFAULT_RETRYS; 1147 new_send->retranscount = IRDMA_DEFAULT_RETRANS; 1148 new_send->sqbuf = sqbuf; 1149 new_send->timetosend = jiffies; 1150 new_send->type = type; 1151 new_send->send_retrans = send_retrans; 1152 new_send->close_when_complete = close_when_complete; 1153 1154 if (type == IRDMA_TIMER_TYPE_CLOSE) { 1155 new_send->timetosend += (HZ / 10); 1156 if (cm_node->close_entry) { 1157 kfree(new_send); 1158 ibdev_dbg(&cm_node->iwdev->ibdev, 1159 "CM: already close entry\n"); 1160 return -EINVAL; 1161 } 1162 1163 cm_node->close_entry = new_send; 1164 } else { /* type == IRDMA_TIMER_TYPE_SEND */ 1165 spin_lock_irqsave(&cm_node->retrans_list_lock, flags); 1166 cm_node->send_entry = new_send; 1167 refcount_inc(&cm_node->refcnt); 1168 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); 1169 new_send->timetosend = jiffies + IRDMA_RETRY_TIMEOUT; 1170 1171 refcount_inc(&sqbuf->refcount); 1172 irdma_puda_send_buf(vsi->ilq, sqbuf); 1173 if (!send_retrans) { 1174 irdma_cleanup_retrans_entry(cm_node); 1175 if (close_when_complete) 1176 irdma_rem_ref_cm_node(cm_node); 1177 return 0; 1178 } 1179 } 1180 1181 spin_lock_irqsave(&cm_core->ht_lock, flags); 1182 was_timer_set = timer_pending(&cm_core->tcp_timer); 1183 1184 if (!was_timer_set) { 1185 cm_core->tcp_timer.expires = new_send->timetosend; 1186 add_timer(&cm_core->tcp_timer); 1187 } 1188 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 1189 1190 return 0; 1191 } 1192 1193 /** 1194 * irdma_retrans_expired - Could not rexmit the packet 1195 * @cm_node: connection's node 1196 */ 1197 static void irdma_retrans_expired(struct irdma_cm_node *cm_node) 1198 { 1199 enum irdma_cm_node_state state = cm_node->state; 1200 1201 cm_node->state = IRDMA_CM_STATE_CLOSED; 1202 switch (state) { 1203 case IRDMA_CM_STATE_SYN_RCVD: 1204 case IRDMA_CM_STATE_CLOSING: 1205 irdma_rem_ref_cm_node(cm_node); 1206 break; 1207 case IRDMA_CM_STATE_FIN_WAIT1: 1208 case IRDMA_CM_STATE_LAST_ACK: 1209 irdma_send_reset(cm_node); 1210 break; 1211 default: 1212 refcount_inc(&cm_node->refcnt); 1213 irdma_send_reset(cm_node); 1214 irdma_create_event(cm_node, IRDMA_CM_EVENT_ABORTED); 1215 break; 1216 } 1217 } 1218 1219 /** 1220 * irdma_handle_close_entry - for handling retry/timeouts 1221 * @cm_node: connection's node 1222 * @rem_node: flag for remove cm_node 1223 */ 1224 static void irdma_handle_close_entry(struct irdma_cm_node *cm_node, 1225 u32 rem_node) 1226 { 1227 struct irdma_timer_entry *close_entry = cm_node->close_entry; 1228 struct irdma_qp *iwqp; 1229 unsigned long flags; 1230 1231 if (!close_entry) 1232 return; 1233 iwqp = (struct irdma_qp *)close_entry->sqbuf; 1234 if (iwqp) { 1235 spin_lock_irqsave(&iwqp->lock, flags); 1236 if (iwqp->cm_id) { 1237 iwqp->hw_tcp_state = IRDMA_TCP_STATE_CLOSED; 1238 iwqp->hw_iwarp_state = IRDMA_QP_STATE_ERROR; 1239 iwqp->last_aeq = IRDMA_AE_RESET_SENT; 1240 iwqp->ibqp_state = IB_QPS_ERR; 1241 spin_unlock_irqrestore(&iwqp->lock, flags); 1242 irdma_cm_disconn(iwqp); 1243 } else { 1244 spin_unlock_irqrestore(&iwqp->lock, flags); 1245 } 1246 } else if (rem_node) { 1247 /* TIME_WAIT state */ 1248 irdma_rem_ref_cm_node(cm_node); 1249 } 1250 1251 kfree(close_entry); 1252 cm_node->close_entry = NULL; 1253 } 1254 1255 /** 1256 * irdma_cm_timer_tick - system's timer expired callback 1257 * @t: Pointer to timer_list 1258 */ 1259 static void irdma_cm_timer_tick(struct timer_list *t) 1260 { 1261 unsigned long nexttimeout = jiffies + IRDMA_LONG_TIME; 1262 struct irdma_cm_node *cm_node; 1263 struct irdma_timer_entry *send_entry, *close_entry; 1264 struct list_head *list_core_temp; 1265 struct list_head *list_node; 1266 struct irdma_cm_core *cm_core = from_timer(cm_core, t, tcp_timer); 1267 struct irdma_sc_vsi *vsi; 1268 u32 settimer = 0; 1269 unsigned long timetosend; 1270 unsigned long flags; 1271 struct list_head timer_list; 1272 1273 INIT_LIST_HEAD(&timer_list); 1274 1275 rcu_read_lock(); 1276 irdma_timer_list_prep(cm_core, &timer_list); 1277 rcu_read_unlock(); 1278 1279 list_for_each_safe (list_node, list_core_temp, &timer_list) { 1280 cm_node = container_of(list_node, struct irdma_cm_node, 1281 timer_entry); 1282 close_entry = cm_node->close_entry; 1283 1284 if (close_entry) { 1285 if (time_after(close_entry->timetosend, jiffies)) { 1286 if (nexttimeout > close_entry->timetosend || 1287 !settimer) { 1288 nexttimeout = close_entry->timetosend; 1289 settimer = 1; 1290 } 1291 } else { 1292 irdma_handle_close_entry(cm_node, 1); 1293 } 1294 } 1295 1296 spin_lock_irqsave(&cm_node->retrans_list_lock, flags); 1297 1298 send_entry = cm_node->send_entry; 1299 if (!send_entry) 1300 goto done; 1301 if (time_after(send_entry->timetosend, jiffies)) { 1302 if (cm_node->state != IRDMA_CM_STATE_OFFLOADED) { 1303 if (nexttimeout > send_entry->timetosend || 1304 !settimer) { 1305 nexttimeout = send_entry->timetosend; 1306 settimer = 1; 1307 } 1308 } else { 1309 irdma_free_retrans_entry(cm_node); 1310 } 1311 goto done; 1312 } 1313 1314 if (cm_node->state == IRDMA_CM_STATE_OFFLOADED || 1315 cm_node->state == IRDMA_CM_STATE_CLOSED) { 1316 irdma_free_retrans_entry(cm_node); 1317 goto done; 1318 } 1319 1320 if (!send_entry->retranscount || !send_entry->retrycount) { 1321 irdma_free_retrans_entry(cm_node); 1322 1323 spin_unlock_irqrestore(&cm_node->retrans_list_lock, 1324 flags); 1325 irdma_retrans_expired(cm_node); 1326 cm_node->state = IRDMA_CM_STATE_CLOSED; 1327 spin_lock_irqsave(&cm_node->retrans_list_lock, flags); 1328 goto done; 1329 } 1330 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); 1331 1332 vsi = &cm_node->iwdev->vsi; 1333 if (!cm_node->ack_rcvd) { 1334 refcount_inc(&send_entry->sqbuf->refcount); 1335 irdma_puda_send_buf(vsi->ilq, send_entry->sqbuf); 1336 cm_node->cm_core->stats_pkt_retrans++; 1337 } 1338 1339 spin_lock_irqsave(&cm_node->retrans_list_lock, flags); 1340 if (send_entry->send_retrans) { 1341 send_entry->retranscount--; 1342 timetosend = (IRDMA_RETRY_TIMEOUT << 1343 (IRDMA_DEFAULT_RETRANS - 1344 send_entry->retranscount)); 1345 1346 send_entry->timetosend = jiffies + 1347 min(timetosend, IRDMA_MAX_TIMEOUT); 1348 if (nexttimeout > send_entry->timetosend || !settimer) { 1349 nexttimeout = send_entry->timetosend; 1350 settimer = 1; 1351 } 1352 } else { 1353 int close_when_complete; 1354 1355 close_when_complete = send_entry->close_when_complete; 1356 irdma_free_retrans_entry(cm_node); 1357 if (close_when_complete) 1358 irdma_rem_ref_cm_node(cm_node); 1359 } 1360 done: 1361 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); 1362 irdma_rem_ref_cm_node(cm_node); 1363 } 1364 1365 if (settimer) { 1366 spin_lock_irqsave(&cm_core->ht_lock, flags); 1367 if (!timer_pending(&cm_core->tcp_timer)) { 1368 cm_core->tcp_timer.expires = nexttimeout; 1369 add_timer(&cm_core->tcp_timer); 1370 } 1371 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 1372 } 1373 } 1374 1375 /** 1376 * irdma_send_syn - send SYN packet 1377 * @cm_node: connection's node 1378 * @sendack: flag to set ACK bit or not 1379 */ 1380 int irdma_send_syn(struct irdma_cm_node *cm_node, u32 sendack) 1381 { 1382 struct irdma_puda_buf *sqbuf; 1383 int flags = SET_SYN; 1384 char optionsbuf[sizeof(struct option_mss) + 1385 sizeof(struct option_windowscale) + 1386 sizeof(struct option_base) + TCP_OPTIONS_PADDING]; 1387 struct irdma_kmem_info opts; 1388 int optionssize = 0; 1389 /* Sending MSS option */ 1390 union all_known_options *options; 1391 1392 opts.addr = optionsbuf; 1393 if (!cm_node) 1394 return -EINVAL; 1395 1396 options = (union all_known_options *)&optionsbuf[optionssize]; 1397 options->mss.optionnum = OPTION_NUM_MSS; 1398 options->mss.len = sizeof(struct option_mss); 1399 options->mss.mss = htons(cm_node->tcp_cntxt.mss); 1400 optionssize += sizeof(struct option_mss); 1401 1402 options = (union all_known_options *)&optionsbuf[optionssize]; 1403 options->windowscale.optionnum = OPTION_NUM_WINDOW_SCALE; 1404 options->windowscale.len = sizeof(struct option_windowscale); 1405 options->windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale; 1406 optionssize += sizeof(struct option_windowscale); 1407 options = (union all_known_options *)&optionsbuf[optionssize]; 1408 options->eol = OPTION_NUM_EOL; 1409 optionssize += 1; 1410 1411 if (sendack) 1412 flags |= SET_ACK; 1413 1414 opts.size = optionssize; 1415 1416 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, &opts, NULL, NULL, 1417 flags); 1418 if (!sqbuf) 1419 return -ENOMEM; 1420 1421 return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 1, 1422 0); 1423 } 1424 1425 /** 1426 * irdma_send_ack - Send ACK packet 1427 * @cm_node: connection's node 1428 */ 1429 void irdma_send_ack(struct irdma_cm_node *cm_node) 1430 { 1431 struct irdma_puda_buf *sqbuf; 1432 struct irdma_sc_vsi *vsi = &cm_node->iwdev->vsi; 1433 1434 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, NULL, NULL, 1435 SET_ACK); 1436 if (sqbuf) 1437 irdma_puda_send_buf(vsi->ilq, sqbuf); 1438 } 1439 1440 /** 1441 * irdma_send_fin - Send FIN pkt 1442 * @cm_node: connection's node 1443 */ 1444 static int irdma_send_fin(struct irdma_cm_node *cm_node) 1445 { 1446 struct irdma_puda_buf *sqbuf; 1447 1448 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, NULL, NULL, 1449 SET_ACK | SET_FIN); 1450 if (!sqbuf) 1451 return -ENOMEM; 1452 1453 return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 1, 1454 0); 1455 } 1456 1457 /** 1458 * irdma_find_listener - find a cm node listening on this addr-port pair 1459 * @cm_core: cm's core 1460 * @dst_addr: listener ip addr 1461 * @ipv4: flag indicating IPv4 when true 1462 * @dst_port: listener tcp port num 1463 * @vlan_id: virtual LAN ID 1464 * @listener_state: state to match with listen node's 1465 */ 1466 static struct irdma_cm_listener * 1467 irdma_find_listener(struct irdma_cm_core *cm_core, u32 *dst_addr, bool ipv4, 1468 u16 dst_port, u16 vlan_id, 1469 enum irdma_cm_listener_state listener_state) 1470 { 1471 struct irdma_cm_listener *listen_node; 1472 static const u32 ip_zero[4] = { 0, 0, 0, 0 }; 1473 u32 listen_addr[4]; 1474 u16 listen_port; 1475 unsigned long flags; 1476 1477 /* walk list and find cm_node associated with this session ID */ 1478 spin_lock_irqsave(&cm_core->listen_list_lock, flags); 1479 list_for_each_entry (listen_node, &cm_core->listen_list, list) { 1480 memcpy(listen_addr, listen_node->loc_addr, sizeof(listen_addr)); 1481 listen_port = listen_node->loc_port; 1482 if (listen_node->ipv4 != ipv4 || listen_port != dst_port || 1483 !(listener_state & listen_node->listener_state)) 1484 continue; 1485 /* compare node pair, return node handle if a match */ 1486 if (!memcmp(listen_addr, ip_zero, sizeof(listen_addr)) || 1487 (!memcmp(listen_addr, dst_addr, sizeof(listen_addr)) && 1488 vlan_id == listen_node->vlan_id)) { 1489 refcount_inc(&listen_node->refcnt); 1490 spin_unlock_irqrestore(&cm_core->listen_list_lock, 1491 flags); 1492 trace_irdma_find_listener(listen_node); 1493 return listen_node; 1494 } 1495 } 1496 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); 1497 1498 return NULL; 1499 } 1500 1501 /** 1502 * irdma_del_multiple_qhash - Remove qhash and child listens 1503 * @iwdev: iWarp device 1504 * @cm_info: CM info for parent listen node 1505 * @cm_parent_listen_node: The parent listen node 1506 */ 1507 static int irdma_del_multiple_qhash(struct irdma_device *iwdev, 1508 struct irdma_cm_info *cm_info, 1509 struct irdma_cm_listener *cm_parent_listen_node) 1510 { 1511 struct irdma_cm_listener *child_listen_node; 1512 struct list_head *pos, *tpos; 1513 unsigned long flags; 1514 int ret = -EINVAL; 1515 1516 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags); 1517 list_for_each_safe (pos, tpos, 1518 &cm_parent_listen_node->child_listen_list) { 1519 child_listen_node = list_entry(pos, struct irdma_cm_listener, 1520 child_listen_list); 1521 if (child_listen_node->ipv4) 1522 ibdev_dbg(&iwdev->ibdev, 1523 "CM: removing child listen for IP=%pI4, port=%d, vlan=%d\n", 1524 child_listen_node->loc_addr, 1525 child_listen_node->loc_port, 1526 child_listen_node->vlan_id); 1527 else 1528 ibdev_dbg(&iwdev->ibdev, 1529 "CM: removing child listen for IP=%pI6, port=%d, vlan=%d\n", 1530 child_listen_node->loc_addr, 1531 child_listen_node->loc_port, 1532 child_listen_node->vlan_id); 1533 trace_irdma_del_multiple_qhash(child_listen_node); 1534 list_del(pos); 1535 memcpy(cm_info->loc_addr, child_listen_node->loc_addr, 1536 sizeof(cm_info->loc_addr)); 1537 cm_info->vlan_id = child_listen_node->vlan_id; 1538 if (child_listen_node->qhash_set) { 1539 ret = irdma_manage_qhash(iwdev, cm_info, 1540 IRDMA_QHASH_TYPE_TCP_SYN, 1541 IRDMA_QHASH_MANAGE_TYPE_DELETE, 1542 NULL, false); 1543 child_listen_node->qhash_set = false; 1544 } else { 1545 ret = 0; 1546 } 1547 ibdev_dbg(&iwdev->ibdev, 1548 "CM: Child listen node freed = %p\n", 1549 child_listen_node); 1550 kfree(child_listen_node); 1551 cm_parent_listen_node->cm_core->stats_listen_nodes_destroyed++; 1552 } 1553 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); 1554 1555 return ret; 1556 } 1557 1558 /** 1559 * irdma_netdev_vlan_ipv6 - Gets the netdev and mac 1560 * @addr: local IPv6 address 1561 * @vlan_id: vlan id for the given IPv6 address 1562 * @mac: mac address for the given IPv6 address 1563 * 1564 * Returns the net_device of the IPv6 address and also sets the 1565 * vlan id and mac for that address. 1566 */ 1567 struct net_device *irdma_netdev_vlan_ipv6(u32 *addr, u16 *vlan_id, u8 *mac) 1568 { 1569 struct net_device *ip_dev = NULL; 1570 struct in6_addr laddr6; 1571 1572 if (!IS_ENABLED(CONFIG_IPV6)) 1573 return NULL; 1574 1575 irdma_copy_ip_htonl(laddr6.in6_u.u6_addr32, addr); 1576 if (vlan_id) 1577 *vlan_id = 0xFFFF; /* Match rdma_vlan_dev_vlan_id() */ 1578 if (mac) 1579 eth_zero_addr(mac); 1580 1581 rcu_read_lock(); 1582 for_each_netdev_rcu (&init_net, ip_dev) { 1583 if (ipv6_chk_addr(&init_net, &laddr6, ip_dev, 1)) { 1584 if (vlan_id) 1585 *vlan_id = rdma_vlan_dev_vlan_id(ip_dev); 1586 if (ip_dev->dev_addr && mac) 1587 ether_addr_copy(mac, ip_dev->dev_addr); 1588 break; 1589 } 1590 } 1591 rcu_read_unlock(); 1592 1593 return ip_dev; 1594 } 1595 1596 /** 1597 * irdma_get_vlan_ipv4 - Returns the vlan_id for IPv4 address 1598 * @addr: local IPv4 address 1599 */ 1600 u16 irdma_get_vlan_ipv4(u32 *addr) 1601 { 1602 struct net_device *netdev; 1603 u16 vlan_id = 0xFFFF; 1604 1605 netdev = ip_dev_find(&init_net, htonl(addr[0])); 1606 if (netdev) { 1607 vlan_id = rdma_vlan_dev_vlan_id(netdev); 1608 dev_put(netdev); 1609 } 1610 1611 return vlan_id; 1612 } 1613 1614 /** 1615 * irdma_add_mqh_6 - Adds multiple qhashes for IPv6 1616 * @iwdev: iWarp device 1617 * @cm_info: CM info for parent listen node 1618 * @cm_parent_listen_node: The parent listen node 1619 * 1620 * Adds a qhash and a child listen node for every IPv6 address 1621 * on the adapter and adds the associated qhash filter 1622 */ 1623 static int irdma_add_mqh_6(struct irdma_device *iwdev, 1624 struct irdma_cm_info *cm_info, 1625 struct irdma_cm_listener *cm_parent_listen_node) 1626 { 1627 struct net_device *ip_dev; 1628 struct inet6_dev *idev; 1629 struct inet6_ifaddr *ifp, *tmp; 1630 struct irdma_cm_listener *child_listen_node; 1631 unsigned long flags; 1632 int ret = 0; 1633 1634 rtnl_lock(); 1635 for_each_netdev(&init_net, ip_dev) { 1636 if (!(ip_dev->flags & IFF_UP)) 1637 continue; 1638 1639 if (((rdma_vlan_dev_vlan_id(ip_dev) >= VLAN_N_VID) || 1640 (rdma_vlan_dev_real_dev(ip_dev) != iwdev->netdev)) && 1641 ip_dev != iwdev->netdev) 1642 continue; 1643 1644 idev = __in6_dev_get(ip_dev); 1645 if (!idev) { 1646 ibdev_dbg(&iwdev->ibdev, "CM: idev == NULL\n"); 1647 break; 1648 } 1649 list_for_each_entry_safe (ifp, tmp, &idev->addr_list, if_list) { 1650 ibdev_dbg(&iwdev->ibdev, "CM: IP=%pI6, vlan_id=%d, MAC=%pM\n", 1651 &ifp->addr, rdma_vlan_dev_vlan_id(ip_dev), 1652 ip_dev->dev_addr); 1653 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_KERNEL); 1654 ibdev_dbg(&iwdev->ibdev, "CM: Allocating child listener %p\n", 1655 child_listen_node); 1656 if (!child_listen_node) { 1657 ibdev_dbg(&iwdev->ibdev, "CM: listener memory allocation\n"); 1658 ret = -ENOMEM; 1659 goto exit; 1660 } 1661 1662 cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev); 1663 cm_parent_listen_node->vlan_id = cm_info->vlan_id; 1664 memcpy(child_listen_node, cm_parent_listen_node, 1665 sizeof(*child_listen_node)); 1666 irdma_copy_ip_ntohl(child_listen_node->loc_addr, 1667 ifp->addr.in6_u.u6_addr32); 1668 memcpy(cm_info->loc_addr, child_listen_node->loc_addr, 1669 sizeof(cm_info->loc_addr)); 1670 ret = irdma_manage_qhash(iwdev, cm_info, 1671 IRDMA_QHASH_TYPE_TCP_SYN, 1672 IRDMA_QHASH_MANAGE_TYPE_ADD, 1673 NULL, true); 1674 if (ret) { 1675 kfree(child_listen_node); 1676 continue; 1677 } 1678 1679 trace_irdma_add_mqh_6(iwdev, child_listen_node, 1680 ip_dev->dev_addr); 1681 1682 child_listen_node->qhash_set = true; 1683 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags); 1684 list_add(&child_listen_node->child_listen_list, 1685 &cm_parent_listen_node->child_listen_list); 1686 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); 1687 cm_parent_listen_node->cm_core->stats_listen_nodes_created++; 1688 } 1689 } 1690 exit: 1691 rtnl_unlock(); 1692 1693 return ret; 1694 } 1695 1696 /** 1697 * irdma_add_mqh_4 - Adds multiple qhashes for IPv4 1698 * @iwdev: iWarp device 1699 * @cm_info: CM info for parent listen node 1700 * @cm_parent_listen_node: The parent listen node 1701 * 1702 * Adds a qhash and a child listen node for every IPv4 address 1703 * on the adapter and adds the associated qhash filter 1704 */ 1705 static int irdma_add_mqh_4(struct irdma_device *iwdev, 1706 struct irdma_cm_info *cm_info, 1707 struct irdma_cm_listener *cm_parent_listen_node) 1708 { 1709 struct net_device *ip_dev; 1710 struct in_device *idev; 1711 struct irdma_cm_listener *child_listen_node; 1712 unsigned long flags; 1713 const struct in_ifaddr *ifa; 1714 int ret = 0; 1715 1716 rtnl_lock(); 1717 for_each_netdev(&init_net, ip_dev) { 1718 if (!(ip_dev->flags & IFF_UP)) 1719 continue; 1720 1721 if (((rdma_vlan_dev_vlan_id(ip_dev) >= VLAN_N_VID) || 1722 (rdma_vlan_dev_real_dev(ip_dev) != iwdev->netdev)) && 1723 ip_dev != iwdev->netdev) 1724 continue; 1725 1726 idev = in_dev_get(ip_dev); 1727 if (!idev) 1728 continue; 1729 1730 in_dev_for_each_ifa_rtnl(ifa, idev) { 1731 ibdev_dbg(&iwdev->ibdev, 1732 "CM: Allocating child CM Listener forIP=%pI4, vlan_id=%d, MAC=%pM\n", 1733 &ifa->ifa_address, rdma_vlan_dev_vlan_id(ip_dev), 1734 ip_dev->dev_addr); 1735 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_KERNEL); 1736 cm_parent_listen_node->cm_core->stats_listen_nodes_created++; 1737 ibdev_dbg(&iwdev->ibdev, "CM: Allocating child listener %p\n", 1738 child_listen_node); 1739 if (!child_listen_node) { 1740 ibdev_dbg(&iwdev->ibdev, "CM: listener memory allocation\n"); 1741 in_dev_put(idev); 1742 ret = -ENOMEM; 1743 goto exit; 1744 } 1745 1746 cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev); 1747 cm_parent_listen_node->vlan_id = cm_info->vlan_id; 1748 memcpy(child_listen_node, cm_parent_listen_node, 1749 sizeof(*child_listen_node)); 1750 child_listen_node->loc_addr[0] = 1751 ntohl(ifa->ifa_address); 1752 memcpy(cm_info->loc_addr, child_listen_node->loc_addr, 1753 sizeof(cm_info->loc_addr)); 1754 ret = irdma_manage_qhash(iwdev, cm_info, 1755 IRDMA_QHASH_TYPE_TCP_SYN, 1756 IRDMA_QHASH_MANAGE_TYPE_ADD, 1757 NULL, true); 1758 if (ret) { 1759 kfree(child_listen_node); 1760 cm_parent_listen_node->cm_core 1761 ->stats_listen_nodes_created--; 1762 continue; 1763 } 1764 1765 trace_irdma_add_mqh_4(iwdev, child_listen_node, 1766 ip_dev->dev_addr); 1767 1768 child_listen_node->qhash_set = true; 1769 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, 1770 flags); 1771 list_add(&child_listen_node->child_listen_list, 1772 &cm_parent_listen_node->child_listen_list); 1773 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); 1774 } 1775 in_dev_put(idev); 1776 } 1777 exit: 1778 rtnl_unlock(); 1779 1780 return ret; 1781 } 1782 1783 /** 1784 * irdma_add_mqh - Adds multiple qhashes 1785 * @iwdev: iWarp device 1786 * @cm_info: CM info for parent listen node 1787 * @cm_listen_node: The parent listen node 1788 */ 1789 static int irdma_add_mqh(struct irdma_device *iwdev, 1790 struct irdma_cm_info *cm_info, 1791 struct irdma_cm_listener *cm_listen_node) 1792 { 1793 if (cm_info->ipv4) 1794 return irdma_add_mqh_4(iwdev, cm_info, cm_listen_node); 1795 else 1796 return irdma_add_mqh_6(iwdev, cm_info, cm_listen_node); 1797 } 1798 1799 /** 1800 * irdma_reset_list_prep - add connection nodes slated for reset to list 1801 * @cm_core: cm's core 1802 * @listener: pointer to listener node 1803 * @reset_list: a list to which cm_node will be selected 1804 */ 1805 static void irdma_reset_list_prep(struct irdma_cm_core *cm_core, 1806 struct irdma_cm_listener *listener, 1807 struct list_head *reset_list) 1808 { 1809 struct irdma_cm_node *cm_node; 1810 int bkt; 1811 1812 hash_for_each_rcu(cm_core->cm_hash_tbl, bkt, cm_node, list) { 1813 if (cm_node->listener == listener && 1814 !cm_node->accelerated && 1815 refcount_inc_not_zero(&cm_node->refcnt)) 1816 list_add(&cm_node->reset_entry, reset_list); 1817 } 1818 } 1819 1820 /** 1821 * irdma_dec_refcnt_listen - delete listener and associated cm nodes 1822 * @cm_core: cm's core 1823 * @listener: pointer to listener node 1824 * @free_hanging_nodes: to free associated cm_nodes 1825 * @apbvt_del: flag to delete the apbvt 1826 */ 1827 static int irdma_dec_refcnt_listen(struct irdma_cm_core *cm_core, 1828 struct irdma_cm_listener *listener, 1829 int free_hanging_nodes, bool apbvt_del) 1830 { 1831 int err; 1832 struct list_head *list_pos; 1833 struct list_head *list_temp; 1834 struct irdma_cm_node *cm_node; 1835 struct list_head reset_list; 1836 struct irdma_cm_info nfo; 1837 enum irdma_cm_node_state old_state; 1838 unsigned long flags; 1839 1840 trace_irdma_dec_refcnt_listen(listener, __builtin_return_address(0)); 1841 /* free non-accelerated child nodes for this listener */ 1842 INIT_LIST_HEAD(&reset_list); 1843 if (free_hanging_nodes) { 1844 rcu_read_lock(); 1845 irdma_reset_list_prep(cm_core, listener, &reset_list); 1846 rcu_read_unlock(); 1847 } 1848 1849 list_for_each_safe (list_pos, list_temp, &reset_list) { 1850 cm_node = container_of(list_pos, struct irdma_cm_node, 1851 reset_entry); 1852 if (cm_node->state >= IRDMA_CM_STATE_FIN_WAIT1) { 1853 irdma_rem_ref_cm_node(cm_node); 1854 continue; 1855 } 1856 1857 irdma_cleanup_retrans_entry(cm_node); 1858 err = irdma_send_reset(cm_node); 1859 if (err) { 1860 cm_node->state = IRDMA_CM_STATE_CLOSED; 1861 ibdev_dbg(&cm_node->iwdev->ibdev, 1862 "CM: send reset failed\n"); 1863 } else { 1864 old_state = cm_node->state; 1865 cm_node->state = IRDMA_CM_STATE_LISTENER_DESTROYED; 1866 if (old_state != IRDMA_CM_STATE_MPAREQ_RCVD) 1867 irdma_rem_ref_cm_node(cm_node); 1868 } 1869 } 1870 1871 if (refcount_dec_and_test(&listener->refcnt)) { 1872 spin_lock_irqsave(&cm_core->listen_list_lock, flags); 1873 list_del(&listener->list); 1874 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); 1875 1876 if (apbvt_del) 1877 irdma_del_apbvt(listener->iwdev, 1878 listener->apbvt_entry); 1879 memcpy(nfo.loc_addr, listener->loc_addr, sizeof(nfo.loc_addr)); 1880 nfo.loc_port = listener->loc_port; 1881 nfo.ipv4 = listener->ipv4; 1882 nfo.vlan_id = listener->vlan_id; 1883 nfo.user_pri = listener->user_pri; 1884 nfo.qh_qpid = listener->iwdev->vsi.ilq->qp_id; 1885 1886 if (!list_empty(&listener->child_listen_list)) { 1887 irdma_del_multiple_qhash(listener->iwdev, &nfo, 1888 listener); 1889 } else { 1890 if (listener->qhash_set) 1891 irdma_manage_qhash(listener->iwdev, 1892 &nfo, 1893 IRDMA_QHASH_TYPE_TCP_SYN, 1894 IRDMA_QHASH_MANAGE_TYPE_DELETE, 1895 NULL, false); 1896 } 1897 1898 cm_core->stats_listen_destroyed++; 1899 cm_core->stats_listen_nodes_destroyed++; 1900 ibdev_dbg(&listener->iwdev->ibdev, 1901 "CM: loc_port=0x%04x loc_addr=%pI4 cm_listen_node=%p cm_id=%p qhash_set=%d vlan_id=%d apbvt_del=%d\n", 1902 listener->loc_port, listener->loc_addr, listener, 1903 listener->cm_id, listener->qhash_set, 1904 listener->vlan_id, apbvt_del); 1905 kfree(listener); 1906 listener = NULL; 1907 return 0; 1908 } 1909 1910 return -EINVAL; 1911 } 1912 1913 /** 1914 * irdma_cm_del_listen - delete a listener 1915 * @cm_core: cm's core 1916 * @listener: passive connection's listener 1917 * @apbvt_del: flag to delete apbvt 1918 */ 1919 static int irdma_cm_del_listen(struct irdma_cm_core *cm_core, 1920 struct irdma_cm_listener *listener, 1921 bool apbvt_del) 1922 { 1923 listener->listener_state = IRDMA_CM_LISTENER_PASSIVE_STATE; 1924 listener->cm_id = NULL; 1925 1926 return irdma_dec_refcnt_listen(cm_core, listener, 1, apbvt_del); 1927 } 1928 1929 /** 1930 * irdma_addr_resolve_neigh - resolve neighbor address 1931 * @iwdev: iwarp device structure 1932 * @src_ip: local ip address 1933 * @dst_ip: remote ip address 1934 * @arpindex: if there is an arp entry 1935 */ 1936 static int irdma_addr_resolve_neigh(struct irdma_device *iwdev, u32 src_ip, 1937 u32 dst_ip, int arpindex) 1938 { 1939 struct rtable *rt; 1940 struct neighbour *neigh; 1941 int rc = arpindex; 1942 __be32 dst_ipaddr = htonl(dst_ip); 1943 __be32 src_ipaddr = htonl(src_ip); 1944 1945 rt = ip_route_output(&init_net, dst_ipaddr, src_ipaddr, 0, 0); 1946 if (IS_ERR(rt)) { 1947 ibdev_dbg(&iwdev->ibdev, "CM: ip_route_output fail\n"); 1948 return -EINVAL; 1949 } 1950 1951 neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr); 1952 if (!neigh) 1953 goto exit; 1954 1955 if (neigh->nud_state & NUD_VALID) 1956 rc = irdma_add_arp(iwdev->rf, &dst_ip, true, neigh->ha); 1957 else 1958 neigh_event_send(neigh, NULL); 1959 if (neigh) 1960 neigh_release(neigh); 1961 exit: 1962 ip_rt_put(rt); 1963 1964 return rc; 1965 } 1966 1967 /** 1968 * irdma_get_dst_ipv6 - get destination cache entry via ipv6 lookup 1969 * @src_addr: local ipv6 sock address 1970 * @dst_addr: destination ipv6 sock address 1971 */ 1972 static struct dst_entry *irdma_get_dst_ipv6(struct sockaddr_in6 *src_addr, 1973 struct sockaddr_in6 *dst_addr) 1974 { 1975 struct dst_entry *dst = NULL; 1976 1977 if ((IS_ENABLED(CONFIG_IPV6))) { 1978 struct flowi6 fl6 = {}; 1979 1980 fl6.daddr = dst_addr->sin6_addr; 1981 fl6.saddr = src_addr->sin6_addr; 1982 if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL) 1983 fl6.flowi6_oif = dst_addr->sin6_scope_id; 1984 1985 dst = ip6_route_output(&init_net, NULL, &fl6); 1986 } 1987 1988 return dst; 1989 } 1990 1991 /** 1992 * irdma_addr_resolve_neigh_ipv6 - resolve neighbor ipv6 address 1993 * @iwdev: iwarp device structure 1994 * @src: local ip address 1995 * @dest: remote ip address 1996 * @arpindex: if there is an arp entry 1997 */ 1998 static int irdma_addr_resolve_neigh_ipv6(struct irdma_device *iwdev, u32 *src, 1999 u32 *dest, int arpindex) 2000 { 2001 struct neighbour *neigh; 2002 int rc = arpindex; 2003 struct dst_entry *dst; 2004 struct sockaddr_in6 dst_addr = {}; 2005 struct sockaddr_in6 src_addr = {}; 2006 2007 dst_addr.sin6_family = AF_INET6; 2008 irdma_copy_ip_htonl(dst_addr.sin6_addr.in6_u.u6_addr32, dest); 2009 src_addr.sin6_family = AF_INET6; 2010 irdma_copy_ip_htonl(src_addr.sin6_addr.in6_u.u6_addr32, src); 2011 dst = irdma_get_dst_ipv6(&src_addr, &dst_addr); 2012 if (!dst || dst->error) { 2013 if (dst) { 2014 dst_release(dst); 2015 ibdev_dbg(&iwdev->ibdev, 2016 "CM: ip6_route_output returned dst->error = %d\n", 2017 dst->error); 2018 } 2019 return -EINVAL; 2020 } 2021 2022 neigh = dst_neigh_lookup(dst, dst_addr.sin6_addr.in6_u.u6_addr32); 2023 if (!neigh) 2024 goto exit; 2025 2026 ibdev_dbg(&iwdev->ibdev, "CM: dst_neigh_lookup MAC=%pM\n", 2027 neigh->ha); 2028 2029 trace_irdma_addr_resolve(iwdev, neigh->ha); 2030 2031 if (neigh->nud_state & NUD_VALID) 2032 rc = irdma_add_arp(iwdev->rf, dest, false, neigh->ha); 2033 else 2034 neigh_event_send(neigh, NULL); 2035 if (neigh) 2036 neigh_release(neigh); 2037 exit: 2038 dst_release(dst); 2039 2040 return rc; 2041 } 2042 2043 /** 2044 * irdma_find_node - find a cm node that matches the reference cm node 2045 * @cm_core: cm's core 2046 * @rem_port: remote tcp port num 2047 * @rem_addr: remote ip addr 2048 * @loc_port: local tcp port num 2049 * @loc_addr: local ip addr 2050 * @vlan_id: local VLAN ID 2051 */ 2052 struct irdma_cm_node *irdma_find_node(struct irdma_cm_core *cm_core, 2053 u16 rem_port, u32 *rem_addr, u16 loc_port, 2054 u32 *loc_addr, u16 vlan_id) 2055 { 2056 struct irdma_cm_node *cm_node; 2057 u32 key = (rem_port << 16) | loc_port; 2058 2059 rcu_read_lock(); 2060 hash_for_each_possible_rcu(cm_core->cm_hash_tbl, cm_node, list, key) { 2061 if (cm_node->vlan_id == vlan_id && 2062 cm_node->loc_port == loc_port && cm_node->rem_port == rem_port && 2063 !memcmp(cm_node->loc_addr, loc_addr, sizeof(cm_node->loc_addr)) && 2064 !memcmp(cm_node->rem_addr, rem_addr, sizeof(cm_node->rem_addr))) { 2065 if (!refcount_inc_not_zero(&cm_node->refcnt)) 2066 goto exit; 2067 rcu_read_unlock(); 2068 trace_irdma_find_node(cm_node, 0, NULL); 2069 return cm_node; 2070 } 2071 } 2072 2073 exit: 2074 rcu_read_unlock(); 2075 2076 /* no owner node */ 2077 return NULL; 2078 } 2079 2080 /** 2081 * irdma_add_hte_node - add a cm node to the hash table 2082 * @cm_core: cm's core 2083 * @cm_node: connection's node 2084 */ 2085 static void irdma_add_hte_node(struct irdma_cm_core *cm_core, 2086 struct irdma_cm_node *cm_node) 2087 { 2088 unsigned long flags; 2089 u32 key = (cm_node->rem_port << 16) | cm_node->loc_port; 2090 2091 spin_lock_irqsave(&cm_core->ht_lock, flags); 2092 hash_add_rcu(cm_core->cm_hash_tbl, &cm_node->list, key); 2093 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 2094 } 2095 2096 /** 2097 * irdma_ipv4_is_lpb - check if loopback 2098 * @loc_addr: local addr to compare 2099 * @rem_addr: remote address 2100 */ 2101 bool irdma_ipv4_is_lpb(u32 loc_addr, u32 rem_addr) 2102 { 2103 return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr); 2104 } 2105 2106 /** 2107 * irdma_ipv6_is_lpb - check if loopback 2108 * @loc_addr: local addr to compare 2109 * @rem_addr: remote address 2110 */ 2111 bool irdma_ipv6_is_lpb(u32 *loc_addr, u32 *rem_addr) 2112 { 2113 struct in6_addr raddr6; 2114 2115 irdma_copy_ip_htonl(raddr6.in6_u.u6_addr32, rem_addr); 2116 2117 return !memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6); 2118 } 2119 2120 /** 2121 * irdma_cm_create_ah - create a cm address handle 2122 * @cm_node: The connection manager node to create AH for 2123 * @wait: Provides option to wait for ah creation or not 2124 */ 2125 static int irdma_cm_create_ah(struct irdma_cm_node *cm_node, bool wait) 2126 { 2127 struct irdma_ah_info ah_info = {}; 2128 struct irdma_device *iwdev = cm_node->iwdev; 2129 2130 ether_addr_copy(ah_info.mac_addr, iwdev->netdev->dev_addr); 2131 2132 ah_info.hop_ttl = 0x40; 2133 ah_info.tc_tos = cm_node->tos; 2134 ah_info.vsi = &iwdev->vsi; 2135 2136 if (cm_node->ipv4) { 2137 ah_info.ipv4_valid = true; 2138 ah_info.dest_ip_addr[0] = cm_node->rem_addr[0]; 2139 ah_info.src_ip_addr[0] = cm_node->loc_addr[0]; 2140 ah_info.do_lpbk = irdma_ipv4_is_lpb(ah_info.src_ip_addr[0], 2141 ah_info.dest_ip_addr[0]); 2142 } else { 2143 memcpy(ah_info.dest_ip_addr, cm_node->rem_addr, 2144 sizeof(ah_info.dest_ip_addr)); 2145 memcpy(ah_info.src_ip_addr, cm_node->loc_addr, 2146 sizeof(ah_info.src_ip_addr)); 2147 ah_info.do_lpbk = irdma_ipv6_is_lpb(ah_info.src_ip_addr, 2148 ah_info.dest_ip_addr); 2149 } 2150 2151 ah_info.vlan_tag = cm_node->vlan_id; 2152 if (cm_node->vlan_id < VLAN_N_VID) { 2153 ah_info.insert_vlan_tag = 1; 2154 ah_info.vlan_tag |= cm_node->user_pri << VLAN_PRIO_SHIFT; 2155 } 2156 2157 ah_info.dst_arpindex = 2158 irdma_arp_table(iwdev->rf, ah_info.dest_ip_addr, 2159 ah_info.ipv4_valid, NULL, IRDMA_ARP_RESOLVE); 2160 2161 if (irdma_puda_create_ah(&iwdev->rf->sc_dev, &ah_info, wait, 2162 IRDMA_PUDA_RSRC_TYPE_ILQ, cm_node, 2163 &cm_node->ah)) 2164 return -ENOMEM; 2165 2166 trace_irdma_create_ah(cm_node); 2167 return 0; 2168 } 2169 2170 /** 2171 * irdma_cm_free_ah - free a cm address handle 2172 * @cm_node: The connection manager node to create AH for 2173 */ 2174 static void irdma_cm_free_ah(struct irdma_cm_node *cm_node) 2175 { 2176 struct irdma_device *iwdev = cm_node->iwdev; 2177 2178 trace_irdma_cm_free_ah(cm_node); 2179 irdma_puda_free_ah(&iwdev->rf->sc_dev, cm_node->ah); 2180 cm_node->ah = NULL; 2181 } 2182 2183 /** 2184 * irdma_make_cm_node - create a new instance of a cm node 2185 * @cm_core: cm's core 2186 * @iwdev: iwarp device structure 2187 * @cm_info: quad info for connection 2188 * @listener: passive connection's listener 2189 */ 2190 static struct irdma_cm_node * 2191 irdma_make_cm_node(struct irdma_cm_core *cm_core, struct irdma_device *iwdev, 2192 struct irdma_cm_info *cm_info, 2193 struct irdma_cm_listener *listener) 2194 { 2195 struct irdma_cm_node *cm_node; 2196 int oldarpindex; 2197 int arpindex; 2198 struct net_device *netdev = iwdev->netdev; 2199 2200 /* create an hte and cm_node for this instance */ 2201 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC); 2202 if (!cm_node) 2203 return NULL; 2204 2205 /* set our node specific transport info */ 2206 cm_node->ipv4 = cm_info->ipv4; 2207 cm_node->vlan_id = cm_info->vlan_id; 2208 if (cm_node->vlan_id >= VLAN_N_VID && iwdev->dcb_vlan_mode) 2209 cm_node->vlan_id = 0; 2210 cm_node->tos = cm_info->tos; 2211 cm_node->user_pri = cm_info->user_pri; 2212 if (listener) { 2213 if (listener->tos != cm_info->tos) 2214 ibdev_warn(&iwdev->ibdev, 2215 "application TOS[%d] and remote client TOS[%d] mismatch\n", 2216 listener->tos, cm_info->tos); 2217 if (iwdev->vsi.dscp_mode) { 2218 cm_node->user_pri = listener->user_pri; 2219 } else { 2220 cm_node->tos = max(listener->tos, cm_info->tos); 2221 cm_node->user_pri = rt_tos2priority(cm_node->tos); 2222 } 2223 ibdev_dbg(&iwdev->ibdev, 2224 "DCB: listener: TOS:[%d] UP:[%d]\n", cm_node->tos, 2225 cm_node->user_pri); 2226 trace_irdma_listener_tos(iwdev, cm_node->tos, 2227 cm_node->user_pri); 2228 } 2229 memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr)); 2230 memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr)); 2231 cm_node->loc_port = cm_info->loc_port; 2232 cm_node->rem_port = cm_info->rem_port; 2233 2234 cm_node->mpa_frame_rev = IRDMA_CM_DEFAULT_MPA_VER; 2235 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO; 2236 cm_node->iwdev = iwdev; 2237 cm_node->dev = &iwdev->rf->sc_dev; 2238 2239 cm_node->ird_size = cm_node->dev->hw_attrs.max_hw_ird; 2240 cm_node->ord_size = cm_node->dev->hw_attrs.max_hw_ord; 2241 2242 cm_node->listener = listener; 2243 cm_node->cm_id = cm_info->cm_id; 2244 ether_addr_copy(cm_node->loc_mac, netdev->dev_addr); 2245 spin_lock_init(&cm_node->retrans_list_lock); 2246 cm_node->ack_rcvd = false; 2247 2248 init_completion(&cm_node->establish_comp); 2249 refcount_set(&cm_node->refcnt, 1); 2250 /* associate our parent CM core */ 2251 cm_node->cm_core = cm_core; 2252 cm_node->tcp_cntxt.loc_id = IRDMA_CM_DEFAULT_LOCAL_ID; 2253 cm_node->tcp_cntxt.rcv_wscale = iwdev->rcv_wscale; 2254 cm_node->tcp_cntxt.rcv_wnd = iwdev->rcv_wnd >> cm_node->tcp_cntxt.rcv_wscale; 2255 if (cm_node->ipv4) { 2256 cm_node->tcp_cntxt.loc_seq_num = secure_tcp_seq(htonl(cm_node->loc_addr[0]), 2257 htonl(cm_node->rem_addr[0]), 2258 htons(cm_node->loc_port), 2259 htons(cm_node->rem_port)); 2260 cm_node->tcp_cntxt.mss = iwdev->vsi.mtu - IRDMA_MTU_TO_MSS_IPV4; 2261 } else if (IS_ENABLED(CONFIG_IPV6)) { 2262 __be32 loc[4] = { 2263 htonl(cm_node->loc_addr[0]), htonl(cm_node->loc_addr[1]), 2264 htonl(cm_node->loc_addr[2]), htonl(cm_node->loc_addr[3]) 2265 }; 2266 __be32 rem[4] = { 2267 htonl(cm_node->rem_addr[0]), htonl(cm_node->rem_addr[1]), 2268 htonl(cm_node->rem_addr[2]), htonl(cm_node->rem_addr[3]) 2269 }; 2270 cm_node->tcp_cntxt.loc_seq_num = secure_tcpv6_seq(loc, rem, 2271 htons(cm_node->loc_port), 2272 htons(cm_node->rem_port)); 2273 cm_node->tcp_cntxt.mss = iwdev->vsi.mtu - IRDMA_MTU_TO_MSS_IPV6; 2274 } 2275 2276 if ((cm_node->ipv4 && 2277 irdma_ipv4_is_lpb(cm_node->loc_addr[0], cm_node->rem_addr[0])) || 2278 (!cm_node->ipv4 && 2279 irdma_ipv6_is_lpb(cm_node->loc_addr, cm_node->rem_addr))) { 2280 cm_node->do_lpb = true; 2281 arpindex = irdma_arp_table(iwdev->rf, cm_node->rem_addr, 2282 cm_node->ipv4, NULL, 2283 IRDMA_ARP_RESOLVE); 2284 } else { 2285 oldarpindex = irdma_arp_table(iwdev->rf, cm_node->rem_addr, 2286 cm_node->ipv4, NULL, 2287 IRDMA_ARP_RESOLVE); 2288 if (cm_node->ipv4) 2289 arpindex = irdma_addr_resolve_neigh(iwdev, 2290 cm_info->loc_addr[0], 2291 cm_info->rem_addr[0], 2292 oldarpindex); 2293 else if (IS_ENABLED(CONFIG_IPV6)) 2294 arpindex = irdma_addr_resolve_neigh_ipv6(iwdev, 2295 cm_info->loc_addr, 2296 cm_info->rem_addr, 2297 oldarpindex); 2298 else 2299 arpindex = -EINVAL; 2300 } 2301 2302 if (arpindex < 0) 2303 goto err; 2304 2305 ether_addr_copy(cm_node->rem_mac, 2306 iwdev->rf->arp_table[arpindex].mac_addr); 2307 irdma_add_hte_node(cm_core, cm_node); 2308 cm_core->stats_nodes_created++; 2309 return cm_node; 2310 2311 err: 2312 kfree(cm_node); 2313 2314 return NULL; 2315 } 2316 2317 static void irdma_destroy_connection(struct irdma_cm_node *cm_node) 2318 { 2319 struct irdma_cm_core *cm_core = cm_node->cm_core; 2320 struct irdma_qp *iwqp; 2321 struct irdma_cm_info nfo; 2322 2323 /* if the node is destroyed before connection was accelerated */ 2324 if (!cm_node->accelerated && cm_node->accept_pend) { 2325 ibdev_dbg(&cm_node->iwdev->ibdev, 2326 "CM: node destroyed before established\n"); 2327 atomic_dec(&cm_node->listener->pend_accepts_cnt); 2328 } 2329 if (cm_node->close_entry) 2330 irdma_handle_close_entry(cm_node, 0); 2331 if (cm_node->listener) { 2332 irdma_dec_refcnt_listen(cm_core, cm_node->listener, 0, true); 2333 } else { 2334 if (cm_node->apbvt_set) { 2335 irdma_del_apbvt(cm_node->iwdev, cm_node->apbvt_entry); 2336 cm_node->apbvt_set = 0; 2337 } 2338 irdma_get_addr_info(cm_node, &nfo); 2339 if (cm_node->qhash_set) { 2340 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id; 2341 irdma_manage_qhash(cm_node->iwdev, &nfo, 2342 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 2343 IRDMA_QHASH_MANAGE_TYPE_DELETE, NULL, 2344 false); 2345 cm_node->qhash_set = 0; 2346 } 2347 } 2348 2349 iwqp = cm_node->iwqp; 2350 if (iwqp) { 2351 cm_node->cm_id->rem_ref(cm_node->cm_id); 2352 cm_node->cm_id = NULL; 2353 iwqp->cm_id = NULL; 2354 irdma_qp_rem_ref(&iwqp->ibqp); 2355 cm_node->iwqp = NULL; 2356 } else if (cm_node->qhash_set) { 2357 irdma_get_addr_info(cm_node, &nfo); 2358 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id; 2359 irdma_manage_qhash(cm_node->iwdev, &nfo, 2360 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 2361 IRDMA_QHASH_MANAGE_TYPE_DELETE, NULL, false); 2362 cm_node->qhash_set = 0; 2363 } 2364 2365 cm_core->cm_free_ah(cm_node); 2366 } 2367 2368 /** 2369 * irdma_rem_ref_cm_node - destroy an instance of a cm node 2370 * @cm_node: connection's node 2371 */ 2372 void irdma_rem_ref_cm_node(struct irdma_cm_node *cm_node) 2373 { 2374 struct irdma_cm_core *cm_core = cm_node->cm_core; 2375 unsigned long flags; 2376 2377 trace_irdma_rem_ref_cm_node(cm_node, 0, __builtin_return_address(0)); 2378 spin_lock_irqsave(&cm_core->ht_lock, flags); 2379 2380 if (!refcount_dec_and_test(&cm_node->refcnt)) { 2381 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 2382 return; 2383 } 2384 if (cm_node->iwqp) { 2385 cm_node->iwqp->cm_node = NULL; 2386 cm_node->iwqp->cm_id = NULL; 2387 } 2388 hash_del_rcu(&cm_node->list); 2389 cm_node->cm_core->stats_nodes_destroyed++; 2390 2391 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 2392 2393 irdma_destroy_connection(cm_node); 2394 2395 kfree_rcu(cm_node, rcu_head); 2396 } 2397 2398 /** 2399 * irdma_handle_fin_pkt - FIN packet received 2400 * @cm_node: connection's node 2401 */ 2402 static void irdma_handle_fin_pkt(struct irdma_cm_node *cm_node) 2403 { 2404 switch (cm_node->state) { 2405 case IRDMA_CM_STATE_SYN_RCVD: 2406 case IRDMA_CM_STATE_SYN_SENT: 2407 case IRDMA_CM_STATE_ESTABLISHED: 2408 case IRDMA_CM_STATE_MPAREJ_RCVD: 2409 cm_node->tcp_cntxt.rcv_nxt++; 2410 irdma_cleanup_retrans_entry(cm_node); 2411 cm_node->state = IRDMA_CM_STATE_LAST_ACK; 2412 irdma_send_fin(cm_node); 2413 break; 2414 case IRDMA_CM_STATE_MPAREQ_SENT: 2415 irdma_create_event(cm_node, IRDMA_CM_EVENT_ABORTED); 2416 cm_node->tcp_cntxt.rcv_nxt++; 2417 irdma_cleanup_retrans_entry(cm_node); 2418 cm_node->state = IRDMA_CM_STATE_CLOSED; 2419 refcount_inc(&cm_node->refcnt); 2420 irdma_send_reset(cm_node); 2421 break; 2422 case IRDMA_CM_STATE_FIN_WAIT1: 2423 cm_node->tcp_cntxt.rcv_nxt++; 2424 irdma_cleanup_retrans_entry(cm_node); 2425 cm_node->state = IRDMA_CM_STATE_CLOSING; 2426 irdma_send_ack(cm_node); 2427 /* 2428 * Wait for ACK as this is simultaneous close. 2429 * After we receive ACK, do not send anything. 2430 * Just rm the node. 2431 */ 2432 break; 2433 case IRDMA_CM_STATE_FIN_WAIT2: 2434 cm_node->tcp_cntxt.rcv_nxt++; 2435 irdma_cleanup_retrans_entry(cm_node); 2436 cm_node->state = IRDMA_CM_STATE_TIME_WAIT; 2437 irdma_send_ack(cm_node); 2438 irdma_schedule_cm_timer(cm_node, NULL, IRDMA_TIMER_TYPE_CLOSE, 2439 1, 0); 2440 break; 2441 case IRDMA_CM_STATE_TIME_WAIT: 2442 cm_node->tcp_cntxt.rcv_nxt++; 2443 irdma_cleanup_retrans_entry(cm_node); 2444 cm_node->state = IRDMA_CM_STATE_CLOSED; 2445 irdma_rem_ref_cm_node(cm_node); 2446 break; 2447 case IRDMA_CM_STATE_OFFLOADED: 2448 default: 2449 ibdev_dbg(&cm_node->iwdev->ibdev, 2450 "CM: bad state node state = %d\n", cm_node->state); 2451 break; 2452 } 2453 } 2454 2455 /** 2456 * irdma_handle_rst_pkt - process received RST packet 2457 * @cm_node: connection's node 2458 * @rbuf: receive buffer 2459 */ 2460 static void irdma_handle_rst_pkt(struct irdma_cm_node *cm_node, 2461 struct irdma_puda_buf *rbuf) 2462 { 2463 ibdev_dbg(&cm_node->iwdev->ibdev, 2464 "CM: caller: %pS cm_node=%p state=%d rem_port=0x%04x loc_port=0x%04x rem_addr=%pI4 loc_addr=%pI4\n", 2465 __builtin_return_address(0), cm_node, cm_node->state, 2466 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr, 2467 cm_node->loc_addr); 2468 2469 irdma_cleanup_retrans_entry(cm_node); 2470 switch (cm_node->state) { 2471 case IRDMA_CM_STATE_SYN_SENT: 2472 case IRDMA_CM_STATE_MPAREQ_SENT: 2473 switch (cm_node->mpa_frame_rev) { 2474 case IETF_MPA_V2: 2475 /* Drop down to MPA_V1*/ 2476 cm_node->mpa_frame_rev = IETF_MPA_V1; 2477 /* send a syn and goto syn sent state */ 2478 cm_node->state = IRDMA_CM_STATE_SYN_SENT; 2479 if (irdma_send_syn(cm_node, 0)) 2480 irdma_active_open_err(cm_node, false); 2481 break; 2482 case IETF_MPA_V1: 2483 default: 2484 irdma_active_open_err(cm_node, false); 2485 break; 2486 } 2487 break; 2488 case IRDMA_CM_STATE_MPAREQ_RCVD: 2489 atomic_inc(&cm_node->passive_state); 2490 break; 2491 case IRDMA_CM_STATE_ESTABLISHED: 2492 case IRDMA_CM_STATE_SYN_RCVD: 2493 case IRDMA_CM_STATE_LISTENING: 2494 irdma_passive_open_err(cm_node, false); 2495 break; 2496 case IRDMA_CM_STATE_OFFLOADED: 2497 irdma_active_open_err(cm_node, false); 2498 break; 2499 case IRDMA_CM_STATE_CLOSED: 2500 break; 2501 case IRDMA_CM_STATE_FIN_WAIT2: 2502 case IRDMA_CM_STATE_FIN_WAIT1: 2503 case IRDMA_CM_STATE_LAST_ACK: 2504 case IRDMA_CM_STATE_TIME_WAIT: 2505 cm_node->state = IRDMA_CM_STATE_CLOSED; 2506 irdma_rem_ref_cm_node(cm_node); 2507 break; 2508 default: 2509 break; 2510 } 2511 } 2512 2513 /** 2514 * irdma_handle_rcv_mpa - Process a recv'd mpa buffer 2515 * @cm_node: connection's node 2516 * @rbuf: receive buffer 2517 */ 2518 static void irdma_handle_rcv_mpa(struct irdma_cm_node *cm_node, 2519 struct irdma_puda_buf *rbuf) 2520 { 2521 int err; 2522 int datasize = rbuf->datalen; 2523 u8 *dataloc = rbuf->data; 2524 2525 enum irdma_cm_event_type type = IRDMA_CM_EVENT_UNKNOWN; 2526 u32 res_type; 2527 2528 err = irdma_parse_mpa(cm_node, dataloc, &res_type, datasize); 2529 if (err) { 2530 if (cm_node->state == IRDMA_CM_STATE_MPAREQ_SENT) 2531 irdma_active_open_err(cm_node, true); 2532 else 2533 irdma_passive_open_err(cm_node, true); 2534 return; 2535 } 2536 2537 switch (cm_node->state) { 2538 case IRDMA_CM_STATE_ESTABLISHED: 2539 if (res_type == IRDMA_MPA_REQUEST_REJECT) 2540 ibdev_dbg(&cm_node->iwdev->ibdev, 2541 "CM: state for reject\n"); 2542 cm_node->state = IRDMA_CM_STATE_MPAREQ_RCVD; 2543 type = IRDMA_CM_EVENT_MPA_REQ; 2544 irdma_send_ack(cm_node); /* ACK received MPA request */ 2545 atomic_set(&cm_node->passive_state, 2546 IRDMA_PASSIVE_STATE_INDICATED); 2547 break; 2548 case IRDMA_CM_STATE_MPAREQ_SENT: 2549 irdma_cleanup_retrans_entry(cm_node); 2550 if (res_type == IRDMA_MPA_REQUEST_REJECT) { 2551 type = IRDMA_CM_EVENT_MPA_REJECT; 2552 cm_node->state = IRDMA_CM_STATE_MPAREJ_RCVD; 2553 } else { 2554 type = IRDMA_CM_EVENT_CONNECTED; 2555 cm_node->state = IRDMA_CM_STATE_OFFLOADED; 2556 } 2557 irdma_send_ack(cm_node); 2558 break; 2559 default: 2560 ibdev_dbg(&cm_node->iwdev->ibdev, 2561 "CM: wrong cm_node state =%d\n", cm_node->state); 2562 break; 2563 } 2564 irdma_create_event(cm_node, type); 2565 } 2566 2567 /** 2568 * irdma_check_syn - Check for error on received syn ack 2569 * @cm_node: connection's node 2570 * @tcph: pointer tcp header 2571 */ 2572 static int irdma_check_syn(struct irdma_cm_node *cm_node, struct tcphdr *tcph) 2573 { 2574 if (ntohl(tcph->ack_seq) != cm_node->tcp_cntxt.loc_seq_num) { 2575 irdma_active_open_err(cm_node, true); 2576 return 1; 2577 } 2578 2579 return 0; 2580 } 2581 2582 /** 2583 * irdma_check_seq - check seq numbers if OK 2584 * @cm_node: connection's node 2585 * @tcph: pointer tcp header 2586 */ 2587 static int irdma_check_seq(struct irdma_cm_node *cm_node, struct tcphdr *tcph) 2588 { 2589 u32 seq; 2590 u32 ack_seq; 2591 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num; 2592 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt; 2593 u32 rcv_wnd; 2594 int err = 0; 2595 2596 seq = ntohl(tcph->seq); 2597 ack_seq = ntohl(tcph->ack_seq); 2598 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd; 2599 if (ack_seq != loc_seq_num || 2600 !between(seq, rcv_nxt, (rcv_nxt + rcv_wnd))) 2601 err = -1; 2602 if (err) 2603 ibdev_dbg(&cm_node->iwdev->ibdev, 2604 "CM: seq number err\n"); 2605 2606 return err; 2607 } 2608 2609 void irdma_add_conn_est_qh(struct irdma_cm_node *cm_node) 2610 { 2611 struct irdma_cm_info nfo; 2612 2613 irdma_get_addr_info(cm_node, &nfo); 2614 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id; 2615 irdma_manage_qhash(cm_node->iwdev, &nfo, 2616 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 2617 IRDMA_QHASH_MANAGE_TYPE_ADD, 2618 cm_node, false); 2619 cm_node->qhash_set = true; 2620 } 2621 2622 /** 2623 * irdma_handle_syn_pkt - is for Passive node 2624 * @cm_node: connection's node 2625 * @rbuf: receive buffer 2626 */ 2627 static void irdma_handle_syn_pkt(struct irdma_cm_node *cm_node, 2628 struct irdma_puda_buf *rbuf) 2629 { 2630 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2631 int err; 2632 u32 inc_sequence; 2633 int optionsize; 2634 2635 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); 2636 inc_sequence = ntohl(tcph->seq); 2637 2638 switch (cm_node->state) { 2639 case IRDMA_CM_STATE_SYN_SENT: 2640 case IRDMA_CM_STATE_MPAREQ_SENT: 2641 /* Rcvd syn on active open connection */ 2642 irdma_active_open_err(cm_node, 1); 2643 break; 2644 case IRDMA_CM_STATE_LISTENING: 2645 /* Passive OPEN */ 2646 if (atomic_read(&cm_node->listener->pend_accepts_cnt) > 2647 cm_node->listener->backlog) { 2648 cm_node->cm_core->stats_backlog_drops++; 2649 irdma_passive_open_err(cm_node, false); 2650 break; 2651 } 2652 err = irdma_handle_tcp_options(cm_node, tcph, optionsize, 1); 2653 if (err) { 2654 irdma_passive_open_err(cm_node, false); 2655 /* drop pkt */ 2656 break; 2657 } 2658 err = cm_node->cm_core->cm_create_ah(cm_node, false); 2659 if (err) { 2660 irdma_passive_open_err(cm_node, false); 2661 /* drop pkt */ 2662 break; 2663 } 2664 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; 2665 cm_node->accept_pend = 1; 2666 atomic_inc(&cm_node->listener->pend_accepts_cnt); 2667 2668 cm_node->state = IRDMA_CM_STATE_SYN_RCVD; 2669 break; 2670 case IRDMA_CM_STATE_CLOSED: 2671 irdma_cleanup_retrans_entry(cm_node); 2672 refcount_inc(&cm_node->refcnt); 2673 irdma_send_reset(cm_node); 2674 break; 2675 case IRDMA_CM_STATE_OFFLOADED: 2676 case IRDMA_CM_STATE_ESTABLISHED: 2677 case IRDMA_CM_STATE_FIN_WAIT1: 2678 case IRDMA_CM_STATE_FIN_WAIT2: 2679 case IRDMA_CM_STATE_MPAREQ_RCVD: 2680 case IRDMA_CM_STATE_LAST_ACK: 2681 case IRDMA_CM_STATE_CLOSING: 2682 case IRDMA_CM_STATE_UNKNOWN: 2683 default: 2684 break; 2685 } 2686 } 2687 2688 /** 2689 * irdma_handle_synack_pkt - Process SYN+ACK packet (active side) 2690 * @cm_node: connection's node 2691 * @rbuf: receive buffer 2692 */ 2693 static void irdma_handle_synack_pkt(struct irdma_cm_node *cm_node, 2694 struct irdma_puda_buf *rbuf) 2695 { 2696 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2697 int err; 2698 u32 inc_sequence; 2699 int optionsize; 2700 2701 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); 2702 inc_sequence = ntohl(tcph->seq); 2703 switch (cm_node->state) { 2704 case IRDMA_CM_STATE_SYN_SENT: 2705 irdma_cleanup_retrans_entry(cm_node); 2706 /* active open */ 2707 if (irdma_check_syn(cm_node, tcph)) { 2708 ibdev_dbg(&cm_node->iwdev->ibdev, 2709 "CM: check syn fail\n"); 2710 return; 2711 } 2712 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); 2713 /* setup options */ 2714 err = irdma_handle_tcp_options(cm_node, tcph, optionsize, 0); 2715 if (err) { 2716 ibdev_dbg(&cm_node->iwdev->ibdev, 2717 "CM: cm_node=%p tcp_options failed\n", 2718 cm_node); 2719 break; 2720 } 2721 irdma_cleanup_retrans_entry(cm_node); 2722 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; 2723 irdma_send_ack(cm_node); /* ACK for the syn_ack */ 2724 err = irdma_send_mpa_request(cm_node); 2725 if (err) { 2726 ibdev_dbg(&cm_node->iwdev->ibdev, 2727 "CM: cm_node=%p irdma_send_mpa_request failed\n", 2728 cm_node); 2729 break; 2730 } 2731 cm_node->state = IRDMA_CM_STATE_MPAREQ_SENT; 2732 break; 2733 case IRDMA_CM_STATE_MPAREQ_RCVD: 2734 irdma_passive_open_err(cm_node, true); 2735 break; 2736 case IRDMA_CM_STATE_LISTENING: 2737 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq); 2738 irdma_cleanup_retrans_entry(cm_node); 2739 cm_node->state = IRDMA_CM_STATE_CLOSED; 2740 irdma_send_reset(cm_node); 2741 break; 2742 case IRDMA_CM_STATE_CLOSED: 2743 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq); 2744 irdma_cleanup_retrans_entry(cm_node); 2745 refcount_inc(&cm_node->refcnt); 2746 irdma_send_reset(cm_node); 2747 break; 2748 case IRDMA_CM_STATE_ESTABLISHED: 2749 case IRDMA_CM_STATE_FIN_WAIT1: 2750 case IRDMA_CM_STATE_FIN_WAIT2: 2751 case IRDMA_CM_STATE_LAST_ACK: 2752 case IRDMA_CM_STATE_OFFLOADED: 2753 case IRDMA_CM_STATE_CLOSING: 2754 case IRDMA_CM_STATE_UNKNOWN: 2755 case IRDMA_CM_STATE_MPAREQ_SENT: 2756 default: 2757 break; 2758 } 2759 } 2760 2761 /** 2762 * irdma_handle_ack_pkt - process packet with ACK 2763 * @cm_node: connection's node 2764 * @rbuf: receive buffer 2765 */ 2766 static int irdma_handle_ack_pkt(struct irdma_cm_node *cm_node, 2767 struct irdma_puda_buf *rbuf) 2768 { 2769 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2770 u32 inc_sequence; 2771 int ret; 2772 int optionsize; 2773 u32 datasize = rbuf->datalen; 2774 2775 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); 2776 2777 if (irdma_check_seq(cm_node, tcph)) 2778 return -EINVAL; 2779 2780 inc_sequence = ntohl(tcph->seq); 2781 switch (cm_node->state) { 2782 case IRDMA_CM_STATE_SYN_RCVD: 2783 irdma_cleanup_retrans_entry(cm_node); 2784 ret = irdma_handle_tcp_options(cm_node, tcph, optionsize, 1); 2785 if (ret) 2786 return ret; 2787 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); 2788 cm_node->state = IRDMA_CM_STATE_ESTABLISHED; 2789 if (datasize) { 2790 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; 2791 irdma_handle_rcv_mpa(cm_node, rbuf); 2792 } 2793 break; 2794 case IRDMA_CM_STATE_ESTABLISHED: 2795 irdma_cleanup_retrans_entry(cm_node); 2796 if (datasize) { 2797 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; 2798 irdma_handle_rcv_mpa(cm_node, rbuf); 2799 } 2800 break; 2801 case IRDMA_CM_STATE_MPAREQ_SENT: 2802 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); 2803 if (datasize) { 2804 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; 2805 cm_node->ack_rcvd = false; 2806 irdma_handle_rcv_mpa(cm_node, rbuf); 2807 } else { 2808 cm_node->ack_rcvd = true; 2809 } 2810 break; 2811 case IRDMA_CM_STATE_LISTENING: 2812 irdma_cleanup_retrans_entry(cm_node); 2813 cm_node->state = IRDMA_CM_STATE_CLOSED; 2814 irdma_send_reset(cm_node); 2815 break; 2816 case IRDMA_CM_STATE_CLOSED: 2817 irdma_cleanup_retrans_entry(cm_node); 2818 refcount_inc(&cm_node->refcnt); 2819 irdma_send_reset(cm_node); 2820 break; 2821 case IRDMA_CM_STATE_LAST_ACK: 2822 case IRDMA_CM_STATE_CLOSING: 2823 irdma_cleanup_retrans_entry(cm_node); 2824 cm_node->state = IRDMA_CM_STATE_CLOSED; 2825 irdma_rem_ref_cm_node(cm_node); 2826 break; 2827 case IRDMA_CM_STATE_FIN_WAIT1: 2828 irdma_cleanup_retrans_entry(cm_node); 2829 cm_node->state = IRDMA_CM_STATE_FIN_WAIT2; 2830 break; 2831 case IRDMA_CM_STATE_SYN_SENT: 2832 case IRDMA_CM_STATE_FIN_WAIT2: 2833 case IRDMA_CM_STATE_OFFLOADED: 2834 case IRDMA_CM_STATE_MPAREQ_RCVD: 2835 case IRDMA_CM_STATE_UNKNOWN: 2836 default: 2837 irdma_cleanup_retrans_entry(cm_node); 2838 break; 2839 } 2840 2841 return 0; 2842 } 2843 2844 /** 2845 * irdma_process_pkt - process cm packet 2846 * @cm_node: connection's node 2847 * @rbuf: receive buffer 2848 */ 2849 static void irdma_process_pkt(struct irdma_cm_node *cm_node, 2850 struct irdma_puda_buf *rbuf) 2851 { 2852 enum irdma_tcpip_pkt_type pkt_type = IRDMA_PKT_TYPE_UNKNOWN; 2853 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2854 u32 fin_set = 0; 2855 int err; 2856 2857 if (tcph->rst) { 2858 pkt_type = IRDMA_PKT_TYPE_RST; 2859 } else if (tcph->syn) { 2860 pkt_type = IRDMA_PKT_TYPE_SYN; 2861 if (tcph->ack) 2862 pkt_type = IRDMA_PKT_TYPE_SYNACK; 2863 } else if (tcph->ack) { 2864 pkt_type = IRDMA_PKT_TYPE_ACK; 2865 } 2866 if (tcph->fin) 2867 fin_set = 1; 2868 2869 switch (pkt_type) { 2870 case IRDMA_PKT_TYPE_SYN: 2871 irdma_handle_syn_pkt(cm_node, rbuf); 2872 break; 2873 case IRDMA_PKT_TYPE_SYNACK: 2874 irdma_handle_synack_pkt(cm_node, rbuf); 2875 break; 2876 case IRDMA_PKT_TYPE_ACK: 2877 err = irdma_handle_ack_pkt(cm_node, rbuf); 2878 if (fin_set && !err) 2879 irdma_handle_fin_pkt(cm_node); 2880 break; 2881 case IRDMA_PKT_TYPE_RST: 2882 irdma_handle_rst_pkt(cm_node, rbuf); 2883 break; 2884 default: 2885 if (fin_set && 2886 (!irdma_check_seq(cm_node, (struct tcphdr *)rbuf->tcph))) 2887 irdma_handle_fin_pkt(cm_node); 2888 break; 2889 } 2890 } 2891 2892 /** 2893 * irdma_make_listen_node - create a listen node with params 2894 * @cm_core: cm's core 2895 * @iwdev: iwarp device structure 2896 * @cm_info: quad info for connection 2897 */ 2898 static struct irdma_cm_listener * 2899 irdma_make_listen_node(struct irdma_cm_core *cm_core, 2900 struct irdma_device *iwdev, 2901 struct irdma_cm_info *cm_info) 2902 { 2903 struct irdma_cm_listener *listener; 2904 unsigned long flags; 2905 2906 /* cannot have multiple matching listeners */ 2907 listener = 2908 irdma_find_listener(cm_core, cm_info->loc_addr, cm_info->ipv4, 2909 cm_info->loc_port, cm_info->vlan_id, 2910 IRDMA_CM_LISTENER_EITHER_STATE); 2911 if (listener && 2912 listener->listener_state == IRDMA_CM_LISTENER_ACTIVE_STATE) { 2913 refcount_dec(&listener->refcnt); 2914 return NULL; 2915 } 2916 2917 if (!listener) { 2918 /* create a CM listen node 2919 * 1/2 node to compare incoming traffic to 2920 */ 2921 listener = kzalloc(sizeof(*listener), GFP_KERNEL); 2922 if (!listener) 2923 return NULL; 2924 cm_core->stats_listen_nodes_created++; 2925 memcpy(listener->loc_addr, cm_info->loc_addr, 2926 sizeof(listener->loc_addr)); 2927 listener->loc_port = cm_info->loc_port; 2928 2929 INIT_LIST_HEAD(&listener->child_listen_list); 2930 2931 refcount_set(&listener->refcnt, 1); 2932 } else { 2933 listener->reused_node = 1; 2934 } 2935 2936 listener->cm_id = cm_info->cm_id; 2937 listener->ipv4 = cm_info->ipv4; 2938 listener->vlan_id = cm_info->vlan_id; 2939 atomic_set(&listener->pend_accepts_cnt, 0); 2940 listener->cm_core = cm_core; 2941 listener->iwdev = iwdev; 2942 2943 listener->backlog = cm_info->backlog; 2944 listener->listener_state = IRDMA_CM_LISTENER_ACTIVE_STATE; 2945 2946 if (!listener->reused_node) { 2947 spin_lock_irqsave(&cm_core->listen_list_lock, flags); 2948 list_add(&listener->list, &cm_core->listen_list); 2949 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); 2950 } 2951 2952 return listener; 2953 } 2954 2955 /** 2956 * irdma_create_cm_node - make a connection node with params 2957 * @cm_core: cm's core 2958 * @iwdev: iwarp device structure 2959 * @conn_param: connection parameters 2960 * @cm_info: quad info for connection 2961 * @caller_cm_node: pointer to cm_node structure to return 2962 */ 2963 static int irdma_create_cm_node(struct irdma_cm_core *cm_core, 2964 struct irdma_device *iwdev, 2965 struct iw_cm_conn_param *conn_param, 2966 struct irdma_cm_info *cm_info, 2967 struct irdma_cm_node **caller_cm_node) 2968 { 2969 struct irdma_cm_node *cm_node; 2970 u16 private_data_len = conn_param->private_data_len; 2971 const void *private_data = conn_param->private_data; 2972 2973 /* create a CM connection node */ 2974 cm_node = irdma_make_cm_node(cm_core, iwdev, cm_info, NULL); 2975 if (!cm_node) 2976 return -ENOMEM; 2977 2978 /* set our node side to client (active) side */ 2979 cm_node->tcp_cntxt.client = 1; 2980 cm_node->tcp_cntxt.rcv_wscale = IRDMA_CM_DEFAULT_RCV_WND_SCALE; 2981 2982 irdma_record_ird_ord(cm_node, conn_param->ird, conn_param->ord); 2983 2984 cm_node->pdata.size = private_data_len; 2985 cm_node->pdata.addr = cm_node->pdata_buf; 2986 2987 memcpy(cm_node->pdata_buf, private_data, private_data_len); 2988 *caller_cm_node = cm_node; 2989 2990 return 0; 2991 } 2992 2993 /** 2994 * irdma_cm_reject - reject and teardown a connection 2995 * @cm_node: connection's node 2996 * @pdata: ptr to private data for reject 2997 * @plen: size of private data 2998 */ 2999 static int irdma_cm_reject(struct irdma_cm_node *cm_node, const void *pdata, 3000 u8 plen) 3001 { 3002 int ret; 3003 int passive_state; 3004 3005 if (cm_node->tcp_cntxt.client) 3006 return 0; 3007 3008 irdma_cleanup_retrans_entry(cm_node); 3009 3010 passive_state = atomic_add_return(1, &cm_node->passive_state); 3011 if (passive_state == IRDMA_SEND_RESET_EVENT) { 3012 cm_node->state = IRDMA_CM_STATE_CLOSED; 3013 irdma_rem_ref_cm_node(cm_node); 3014 return 0; 3015 } 3016 3017 if (cm_node->state == IRDMA_CM_STATE_LISTENER_DESTROYED) { 3018 irdma_rem_ref_cm_node(cm_node); 3019 return 0; 3020 } 3021 3022 ret = irdma_send_mpa_reject(cm_node, pdata, plen); 3023 if (!ret) 3024 return 0; 3025 3026 cm_node->state = IRDMA_CM_STATE_CLOSED; 3027 if (irdma_send_reset(cm_node)) 3028 ibdev_dbg(&cm_node->iwdev->ibdev, 3029 "CM: send reset failed\n"); 3030 3031 return ret; 3032 } 3033 3034 /** 3035 * irdma_cm_close - close of cm connection 3036 * @cm_node: connection's node 3037 */ 3038 static int irdma_cm_close(struct irdma_cm_node *cm_node) 3039 { 3040 switch (cm_node->state) { 3041 case IRDMA_CM_STATE_SYN_RCVD: 3042 case IRDMA_CM_STATE_SYN_SENT: 3043 case IRDMA_CM_STATE_ONE_SIDE_ESTABLISHED: 3044 case IRDMA_CM_STATE_ESTABLISHED: 3045 case IRDMA_CM_STATE_ACCEPTING: 3046 case IRDMA_CM_STATE_MPAREQ_SENT: 3047 case IRDMA_CM_STATE_MPAREQ_RCVD: 3048 irdma_cleanup_retrans_entry(cm_node); 3049 irdma_send_reset(cm_node); 3050 break; 3051 case IRDMA_CM_STATE_CLOSE_WAIT: 3052 cm_node->state = IRDMA_CM_STATE_LAST_ACK; 3053 irdma_send_fin(cm_node); 3054 break; 3055 case IRDMA_CM_STATE_FIN_WAIT1: 3056 case IRDMA_CM_STATE_FIN_WAIT2: 3057 case IRDMA_CM_STATE_LAST_ACK: 3058 case IRDMA_CM_STATE_TIME_WAIT: 3059 case IRDMA_CM_STATE_CLOSING: 3060 return -EINVAL; 3061 case IRDMA_CM_STATE_LISTENING: 3062 irdma_cleanup_retrans_entry(cm_node); 3063 irdma_send_reset(cm_node); 3064 break; 3065 case IRDMA_CM_STATE_MPAREJ_RCVD: 3066 case IRDMA_CM_STATE_UNKNOWN: 3067 case IRDMA_CM_STATE_INITED: 3068 case IRDMA_CM_STATE_CLOSED: 3069 case IRDMA_CM_STATE_LISTENER_DESTROYED: 3070 irdma_rem_ref_cm_node(cm_node); 3071 break; 3072 case IRDMA_CM_STATE_OFFLOADED: 3073 if (cm_node->send_entry) 3074 ibdev_dbg(&cm_node->iwdev->ibdev, 3075 "CM: CM send_entry in OFFLOADED state\n"); 3076 irdma_rem_ref_cm_node(cm_node); 3077 break; 3078 } 3079 3080 return 0; 3081 } 3082 3083 /** 3084 * irdma_receive_ilq - recv an ETHERNET packet, and process it 3085 * through CM 3086 * @vsi: VSI structure of dev 3087 * @rbuf: receive buffer 3088 */ 3089 void irdma_receive_ilq(struct irdma_sc_vsi *vsi, struct irdma_puda_buf *rbuf) 3090 { 3091 struct irdma_cm_node *cm_node; 3092 struct irdma_cm_listener *listener; 3093 struct iphdr *iph; 3094 struct ipv6hdr *ip6h; 3095 struct tcphdr *tcph; 3096 struct irdma_cm_info cm_info = {}; 3097 struct irdma_device *iwdev = vsi->back_vsi; 3098 struct irdma_cm_core *cm_core = &iwdev->cm_core; 3099 struct vlan_ethhdr *ethh; 3100 u16 vtag; 3101 3102 /* if vlan, then maclen = 18 else 14 */ 3103 iph = (struct iphdr *)rbuf->iph; 3104 print_hex_dump_debug("ILQ: RECEIVE ILQ BUFFER", DUMP_PREFIX_OFFSET, 3105 16, 8, rbuf->mem.va, rbuf->totallen, false); 3106 if (iwdev->rf->sc_dev.hw_attrs.uk_attrs.hw_rev >= IRDMA_GEN_2) { 3107 if (rbuf->vlan_valid) { 3108 vtag = rbuf->vlan_id; 3109 cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >> 3110 VLAN_PRIO_SHIFT; 3111 cm_info.vlan_id = vtag & VLAN_VID_MASK; 3112 } else { 3113 cm_info.vlan_id = 0xFFFF; 3114 } 3115 } else { 3116 ethh = rbuf->mem.va; 3117 3118 if (ethh->h_vlan_proto == htons(ETH_P_8021Q)) { 3119 vtag = ntohs(ethh->h_vlan_TCI); 3120 cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >> 3121 VLAN_PRIO_SHIFT; 3122 cm_info.vlan_id = vtag & VLAN_VID_MASK; 3123 ibdev_dbg(&cm_core->iwdev->ibdev, 3124 "CM: vlan_id=%d\n", cm_info.vlan_id); 3125 } else { 3126 cm_info.vlan_id = 0xFFFF; 3127 } 3128 } 3129 tcph = (struct tcphdr *)rbuf->tcph; 3130 3131 if (rbuf->ipv4) { 3132 cm_info.loc_addr[0] = ntohl(iph->daddr); 3133 cm_info.rem_addr[0] = ntohl(iph->saddr); 3134 cm_info.ipv4 = true; 3135 cm_info.tos = iph->tos; 3136 } else { 3137 ip6h = (struct ipv6hdr *)rbuf->iph; 3138 irdma_copy_ip_ntohl(cm_info.loc_addr, 3139 ip6h->daddr.in6_u.u6_addr32); 3140 irdma_copy_ip_ntohl(cm_info.rem_addr, 3141 ip6h->saddr.in6_u.u6_addr32); 3142 cm_info.ipv4 = false; 3143 cm_info.tos = (ip6h->priority << 4) | (ip6h->flow_lbl[0] >> 4); 3144 } 3145 cm_info.loc_port = ntohs(tcph->dest); 3146 cm_info.rem_port = ntohs(tcph->source); 3147 cm_node = irdma_find_node(cm_core, cm_info.rem_port, cm_info.rem_addr, 3148 cm_info.loc_port, cm_info.loc_addr, cm_info.vlan_id); 3149 3150 if (!cm_node) { 3151 /* Only type of packet accepted are for the 3152 * PASSIVE open (syn only) 3153 */ 3154 if (!tcph->syn || tcph->ack) 3155 return; 3156 3157 listener = irdma_find_listener(cm_core, 3158 cm_info.loc_addr, 3159 cm_info.ipv4, 3160 cm_info.loc_port, 3161 cm_info.vlan_id, 3162 IRDMA_CM_LISTENER_ACTIVE_STATE); 3163 if (!listener) { 3164 cm_info.cm_id = NULL; 3165 ibdev_dbg(&cm_core->iwdev->ibdev, 3166 "CM: no listener found\n"); 3167 return; 3168 } 3169 3170 cm_info.cm_id = listener->cm_id; 3171 cm_node = irdma_make_cm_node(cm_core, iwdev, &cm_info, 3172 listener); 3173 if (!cm_node) { 3174 ibdev_dbg(&cm_core->iwdev->ibdev, 3175 "CM: allocate node failed\n"); 3176 refcount_dec(&listener->refcnt); 3177 return; 3178 } 3179 3180 if (!tcph->rst && !tcph->fin) { 3181 cm_node->state = IRDMA_CM_STATE_LISTENING; 3182 } else { 3183 irdma_rem_ref_cm_node(cm_node); 3184 return; 3185 } 3186 3187 refcount_inc(&cm_node->refcnt); 3188 } else if (cm_node->state == IRDMA_CM_STATE_OFFLOADED) { 3189 irdma_rem_ref_cm_node(cm_node); 3190 return; 3191 } 3192 3193 irdma_process_pkt(cm_node, rbuf); 3194 irdma_rem_ref_cm_node(cm_node); 3195 } 3196 3197 static int irdma_add_qh(struct irdma_cm_node *cm_node, bool active) 3198 { 3199 if (!active) 3200 irdma_add_conn_est_qh(cm_node); 3201 return 0; 3202 } 3203 3204 static void irdma_cm_free_ah_nop(struct irdma_cm_node *cm_node) 3205 { 3206 } 3207 3208 /** 3209 * irdma_setup_cm_core - setup top level instance of a cm core 3210 * @iwdev: iwarp device structure 3211 * @rdma_ver: HW version 3212 */ 3213 int irdma_setup_cm_core(struct irdma_device *iwdev, u8 rdma_ver) 3214 { 3215 struct irdma_cm_core *cm_core = &iwdev->cm_core; 3216 3217 cm_core->iwdev = iwdev; 3218 cm_core->dev = &iwdev->rf->sc_dev; 3219 3220 /* Handles CM event work items send to Iwarp core */ 3221 cm_core->event_wq = alloc_ordered_workqueue("iwarp-event-wq", 0); 3222 if (!cm_core->event_wq) 3223 return -ENOMEM; 3224 3225 INIT_LIST_HEAD(&cm_core->listen_list); 3226 3227 timer_setup(&cm_core->tcp_timer, irdma_cm_timer_tick, 0); 3228 3229 spin_lock_init(&cm_core->ht_lock); 3230 spin_lock_init(&cm_core->listen_list_lock); 3231 spin_lock_init(&cm_core->apbvt_lock); 3232 switch (rdma_ver) { 3233 case IRDMA_GEN_1: 3234 cm_core->form_cm_frame = irdma_form_uda_cm_frame; 3235 cm_core->cm_create_ah = irdma_add_qh; 3236 cm_core->cm_free_ah = irdma_cm_free_ah_nop; 3237 break; 3238 case IRDMA_GEN_2: 3239 default: 3240 cm_core->form_cm_frame = irdma_form_ah_cm_frame; 3241 cm_core->cm_create_ah = irdma_cm_create_ah; 3242 cm_core->cm_free_ah = irdma_cm_free_ah; 3243 } 3244 3245 return 0; 3246 } 3247 3248 /** 3249 * irdma_cleanup_cm_core - deallocate a top level instance of a 3250 * cm core 3251 * @cm_core: cm's core 3252 */ 3253 void irdma_cleanup_cm_core(struct irdma_cm_core *cm_core) 3254 { 3255 if (!cm_core) 3256 return; 3257 3258 del_timer_sync(&cm_core->tcp_timer); 3259 3260 destroy_workqueue(cm_core->event_wq); 3261 cm_core->dev->ws_reset(&cm_core->iwdev->vsi); 3262 } 3263 3264 /** 3265 * irdma_init_tcp_ctx - setup qp context 3266 * @cm_node: connection's node 3267 * @tcp_info: offload info for tcp 3268 * @iwqp: associate qp for the connection 3269 */ 3270 static void irdma_init_tcp_ctx(struct irdma_cm_node *cm_node, 3271 struct irdma_tcp_offload_info *tcp_info, 3272 struct irdma_qp *iwqp) 3273 { 3274 tcp_info->ipv4 = cm_node->ipv4; 3275 tcp_info->drop_ooo_seg = !iwqp->iwdev->iw_ooo; 3276 tcp_info->wscale = true; 3277 tcp_info->ignore_tcp_opt = true; 3278 tcp_info->ignore_tcp_uns_opt = true; 3279 tcp_info->no_nagle = false; 3280 3281 tcp_info->ttl = IRDMA_DEFAULT_TTL; 3282 tcp_info->rtt_var = IRDMA_DEFAULT_RTT_VAR; 3283 tcp_info->ss_thresh = IRDMA_DEFAULT_SS_THRESH; 3284 tcp_info->rexmit_thresh = IRDMA_DEFAULT_REXMIT_THRESH; 3285 3286 tcp_info->tcp_state = IRDMA_TCP_STATE_ESTABLISHED; 3287 tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale; 3288 tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale; 3289 3290 tcp_info->snd_nxt = cm_node->tcp_cntxt.loc_seq_num; 3291 tcp_info->snd_wnd = cm_node->tcp_cntxt.snd_wnd; 3292 tcp_info->rcv_nxt = cm_node->tcp_cntxt.rcv_nxt; 3293 tcp_info->snd_max = cm_node->tcp_cntxt.loc_seq_num; 3294 3295 tcp_info->snd_una = cm_node->tcp_cntxt.loc_seq_num; 3296 tcp_info->cwnd = 2 * cm_node->tcp_cntxt.mss; 3297 tcp_info->snd_wl1 = cm_node->tcp_cntxt.rcv_nxt; 3298 tcp_info->snd_wl2 = cm_node->tcp_cntxt.loc_seq_num; 3299 tcp_info->max_snd_window = cm_node->tcp_cntxt.max_snd_wnd; 3300 tcp_info->rcv_wnd = cm_node->tcp_cntxt.rcv_wnd 3301 << cm_node->tcp_cntxt.rcv_wscale; 3302 3303 tcp_info->flow_label = 0; 3304 tcp_info->snd_mss = (u32)cm_node->tcp_cntxt.mss; 3305 tcp_info->tos = cm_node->tos; 3306 if (cm_node->vlan_id < VLAN_N_VID) { 3307 tcp_info->insert_vlan_tag = true; 3308 tcp_info->vlan_tag = cm_node->vlan_id; 3309 tcp_info->vlan_tag |= cm_node->user_pri << VLAN_PRIO_SHIFT; 3310 } 3311 if (cm_node->ipv4) { 3312 tcp_info->src_port = cm_node->loc_port; 3313 tcp_info->dst_port = cm_node->rem_port; 3314 3315 tcp_info->dest_ip_addr[3] = cm_node->rem_addr[0]; 3316 tcp_info->local_ipaddr[3] = cm_node->loc_addr[0]; 3317 tcp_info->arp_idx = (u16)irdma_arp_table(iwqp->iwdev->rf, 3318 &tcp_info->dest_ip_addr[3], 3319 true, NULL, 3320 IRDMA_ARP_RESOLVE); 3321 } else { 3322 tcp_info->src_port = cm_node->loc_port; 3323 tcp_info->dst_port = cm_node->rem_port; 3324 memcpy(tcp_info->dest_ip_addr, cm_node->rem_addr, 3325 sizeof(tcp_info->dest_ip_addr)); 3326 memcpy(tcp_info->local_ipaddr, cm_node->loc_addr, 3327 sizeof(tcp_info->local_ipaddr)); 3328 3329 tcp_info->arp_idx = (u16)irdma_arp_table(iwqp->iwdev->rf, 3330 &tcp_info->dest_ip_addr[0], 3331 false, NULL, 3332 IRDMA_ARP_RESOLVE); 3333 } 3334 } 3335 3336 /** 3337 * irdma_cm_init_tsa_conn - setup qp for RTS 3338 * @iwqp: associate qp for the connection 3339 * @cm_node: connection's node 3340 */ 3341 static void irdma_cm_init_tsa_conn(struct irdma_qp *iwqp, 3342 struct irdma_cm_node *cm_node) 3343 { 3344 struct irdma_iwarp_offload_info *iwarp_info; 3345 struct irdma_qp_host_ctx_info *ctx_info; 3346 3347 iwarp_info = &iwqp->iwarp_info; 3348 ctx_info = &iwqp->ctx_info; 3349 3350 ctx_info->tcp_info = &iwqp->tcp_info; 3351 ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id; 3352 ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id; 3353 3354 iwarp_info->ord_size = cm_node->ord_size; 3355 iwarp_info->ird_size = cm_node->ird_size; 3356 iwarp_info->rd_en = true; 3357 iwarp_info->rdmap_ver = 1; 3358 iwarp_info->ddp_ver = 1; 3359 iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id; 3360 3361 ctx_info->tcp_info_valid = true; 3362 ctx_info->iwarp_info_valid = true; 3363 ctx_info->user_pri = cm_node->user_pri; 3364 3365 irdma_init_tcp_ctx(cm_node, &iwqp->tcp_info, iwqp); 3366 if (cm_node->snd_mark_en) { 3367 iwarp_info->snd_mark_en = true; 3368 iwarp_info->snd_mark_offset = (iwqp->tcp_info.snd_nxt & SNDMARKER_SEQNMASK) + 3369 cm_node->lsmm_size; 3370 } 3371 3372 cm_node->state = IRDMA_CM_STATE_OFFLOADED; 3373 iwqp->tcp_info.tcp_state = IRDMA_TCP_STATE_ESTABLISHED; 3374 iwqp->tcp_info.src_mac_addr_idx = iwqp->iwdev->mac_ip_table_idx; 3375 3376 if (cm_node->rcv_mark_en) { 3377 iwarp_info->rcv_mark_en = true; 3378 iwarp_info->align_hdrs = true; 3379 } 3380 3381 irdma_sc_qp_setctx(&iwqp->sc_qp, iwqp->host_ctx.va, ctx_info); 3382 3383 /* once tcp_info is set, no need to do it again */ 3384 ctx_info->tcp_info_valid = false; 3385 ctx_info->iwarp_info_valid = false; 3386 } 3387 3388 /** 3389 * irdma_cm_disconn - when a connection is being closed 3390 * @iwqp: associated qp for the connection 3391 */ 3392 void irdma_cm_disconn(struct irdma_qp *iwqp) 3393 { 3394 struct irdma_device *iwdev = iwqp->iwdev; 3395 struct disconn_work *work; 3396 unsigned long flags; 3397 3398 work = kzalloc(sizeof(*work), GFP_ATOMIC); 3399 if (!work) 3400 return; 3401 3402 spin_lock_irqsave(&iwdev->rf->qptable_lock, flags); 3403 if (!iwdev->rf->qp_table[iwqp->ibqp.qp_num]) { 3404 spin_unlock_irqrestore(&iwdev->rf->qptable_lock, flags); 3405 ibdev_dbg(&iwdev->ibdev, 3406 "CM: qp_id %d is already freed\n", 3407 iwqp->ibqp.qp_num); 3408 kfree(work); 3409 return; 3410 } 3411 irdma_qp_add_ref(&iwqp->ibqp); 3412 spin_unlock_irqrestore(&iwdev->rf->qptable_lock, flags); 3413 3414 work->iwqp = iwqp; 3415 INIT_WORK(&work->work, irdma_disconnect_worker); 3416 queue_work(iwdev->cleanup_wq, &work->work); 3417 } 3418 3419 /** 3420 * irdma_qp_disconnect - free qp and close cm 3421 * @iwqp: associate qp for the connection 3422 */ 3423 static void irdma_qp_disconnect(struct irdma_qp *iwqp) 3424 { 3425 struct irdma_device *iwdev = iwqp->iwdev; 3426 3427 iwqp->active_conn = 0; 3428 /* close the CM node down if it is still active */ 3429 ibdev_dbg(&iwdev->ibdev, "CM: Call close API\n"); 3430 irdma_cm_close(iwqp->cm_node); 3431 } 3432 3433 /** 3434 * irdma_cm_disconn_true - called by worker thread to disconnect qp 3435 * @iwqp: associate qp for the connection 3436 */ 3437 static void irdma_cm_disconn_true(struct irdma_qp *iwqp) 3438 { 3439 struct iw_cm_id *cm_id; 3440 struct irdma_device *iwdev; 3441 struct irdma_sc_qp *qp = &iwqp->sc_qp; 3442 u16 last_ae; 3443 u8 original_hw_tcp_state; 3444 u8 original_ibqp_state; 3445 int disconn_status = 0; 3446 int issue_disconn = 0; 3447 int issue_close = 0; 3448 int issue_flush = 0; 3449 unsigned long flags; 3450 int err; 3451 3452 iwdev = iwqp->iwdev; 3453 spin_lock_irqsave(&iwqp->lock, flags); 3454 if (rdma_protocol_roce(&iwdev->ibdev, 1)) { 3455 struct ib_qp_attr attr; 3456 3457 if (iwqp->flush_issued || iwqp->sc_qp.qp_uk.destroy_pending) { 3458 spin_unlock_irqrestore(&iwqp->lock, flags); 3459 return; 3460 } 3461 3462 spin_unlock_irqrestore(&iwqp->lock, flags); 3463 3464 attr.qp_state = IB_QPS_ERR; 3465 irdma_modify_qp_roce(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); 3466 irdma_ib_qp_event(iwqp, qp->event_type); 3467 return; 3468 } 3469 3470 cm_id = iwqp->cm_id; 3471 original_hw_tcp_state = iwqp->hw_tcp_state; 3472 original_ibqp_state = iwqp->ibqp_state; 3473 last_ae = iwqp->last_aeq; 3474 3475 if (qp->term_flags) { 3476 issue_disconn = 1; 3477 issue_close = 1; 3478 iwqp->cm_id = NULL; 3479 irdma_terminate_del_timer(qp); 3480 if (!iwqp->flush_issued) { 3481 iwqp->flush_issued = 1; 3482 issue_flush = 1; 3483 } 3484 } else if ((original_hw_tcp_state == IRDMA_TCP_STATE_CLOSE_WAIT) || 3485 ((original_ibqp_state == IB_QPS_RTS) && 3486 (last_ae == IRDMA_AE_LLP_CONNECTION_RESET))) { 3487 issue_disconn = 1; 3488 if (last_ae == IRDMA_AE_LLP_CONNECTION_RESET) 3489 disconn_status = -ECONNRESET; 3490 } 3491 3492 if (original_hw_tcp_state == IRDMA_TCP_STATE_CLOSED || 3493 original_hw_tcp_state == IRDMA_TCP_STATE_TIME_WAIT || 3494 last_ae == IRDMA_AE_RDMAP_ROE_BAD_LLP_CLOSE || 3495 last_ae == IRDMA_AE_BAD_CLOSE || 3496 last_ae == IRDMA_AE_LLP_CONNECTION_RESET || iwdev->rf->reset || !cm_id) { 3497 issue_close = 1; 3498 iwqp->cm_id = NULL; 3499 qp->term_flags = 0; 3500 if (!iwqp->flush_issued) { 3501 iwqp->flush_issued = 1; 3502 issue_flush = 1; 3503 } 3504 } 3505 3506 spin_unlock_irqrestore(&iwqp->lock, flags); 3507 if (issue_flush && !iwqp->sc_qp.qp_uk.destroy_pending) { 3508 irdma_flush_wqes(iwqp, IRDMA_FLUSH_SQ | IRDMA_FLUSH_RQ | 3509 IRDMA_FLUSH_WAIT); 3510 3511 if (qp->term_flags) 3512 irdma_ib_qp_event(iwqp, qp->event_type); 3513 } 3514 3515 if (!cm_id || !cm_id->event_handler) 3516 return; 3517 3518 spin_lock_irqsave(&iwdev->cm_core.ht_lock, flags); 3519 if (!iwqp->cm_node) { 3520 spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags); 3521 return; 3522 } 3523 refcount_inc(&iwqp->cm_node->refcnt); 3524 3525 spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags); 3526 3527 if (issue_disconn) { 3528 err = irdma_send_cm_event(iwqp->cm_node, cm_id, 3529 IW_CM_EVENT_DISCONNECT, 3530 disconn_status); 3531 if (err) 3532 ibdev_dbg(&iwdev->ibdev, 3533 "CM: disconnect event failed: - cm_id = %p\n", 3534 cm_id); 3535 } 3536 if (issue_close) { 3537 cm_id->provider_data = iwqp; 3538 err = irdma_send_cm_event(iwqp->cm_node, cm_id, 3539 IW_CM_EVENT_CLOSE, 0); 3540 if (err) 3541 ibdev_dbg(&iwdev->ibdev, 3542 "CM: close event failed: - cm_id = %p\n", 3543 cm_id); 3544 irdma_qp_disconnect(iwqp); 3545 } 3546 irdma_rem_ref_cm_node(iwqp->cm_node); 3547 } 3548 3549 /** 3550 * irdma_disconnect_worker - worker for connection close 3551 * @work: points or disconn structure 3552 */ 3553 static void irdma_disconnect_worker(struct work_struct *work) 3554 { 3555 struct disconn_work *dwork = container_of(work, struct disconn_work, work); 3556 struct irdma_qp *iwqp = dwork->iwqp; 3557 3558 kfree(dwork); 3559 irdma_cm_disconn_true(iwqp); 3560 irdma_qp_rem_ref(&iwqp->ibqp); 3561 } 3562 3563 /** 3564 * irdma_free_lsmm_rsrc - free lsmm memory and deregister 3565 * @iwqp: associate qp for the connection 3566 */ 3567 void irdma_free_lsmm_rsrc(struct irdma_qp *iwqp) 3568 { 3569 struct irdma_device *iwdev; 3570 3571 iwdev = iwqp->iwdev; 3572 3573 if (iwqp->ietf_mem.va) { 3574 if (iwqp->lsmm_mr) 3575 iwdev->ibdev.ops.dereg_mr(iwqp->lsmm_mr, NULL); 3576 dma_free_coherent(iwdev->rf->sc_dev.hw->device, 3577 iwqp->ietf_mem.size, iwqp->ietf_mem.va, 3578 iwqp->ietf_mem.pa); 3579 iwqp->ietf_mem.va = NULL; 3580 iwqp->ietf_mem.va = NULL; 3581 } 3582 } 3583 3584 /** 3585 * irdma_accept - registered call for connection to be accepted 3586 * @cm_id: cm information for passive connection 3587 * @conn_param: accpet parameters 3588 */ 3589 int irdma_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) 3590 { 3591 struct ib_qp *ibqp; 3592 struct irdma_qp *iwqp; 3593 struct irdma_device *iwdev; 3594 struct irdma_sc_dev *dev; 3595 struct irdma_cm_node *cm_node; 3596 struct ib_qp_attr attr = {}; 3597 int passive_state; 3598 struct ib_mr *ibmr; 3599 struct irdma_pd *iwpd; 3600 u16 buf_len = 0; 3601 struct irdma_kmem_info accept; 3602 u64 tagged_offset; 3603 int wait_ret; 3604 int ret = 0; 3605 3606 ibqp = irdma_get_qp(cm_id->device, conn_param->qpn); 3607 if (!ibqp) 3608 return -EINVAL; 3609 3610 iwqp = to_iwqp(ibqp); 3611 iwdev = iwqp->iwdev; 3612 dev = &iwdev->rf->sc_dev; 3613 cm_node = cm_id->provider_data; 3614 3615 if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) { 3616 cm_node->ipv4 = true; 3617 cm_node->vlan_id = irdma_get_vlan_ipv4(cm_node->loc_addr); 3618 } else { 3619 cm_node->ipv4 = false; 3620 irdma_netdev_vlan_ipv6(cm_node->loc_addr, &cm_node->vlan_id, 3621 NULL); 3622 } 3623 ibdev_dbg(&iwdev->ibdev, "CM: Accept vlan_id=%d\n", 3624 cm_node->vlan_id); 3625 3626 trace_irdma_accept(cm_node, 0, NULL); 3627 3628 if (cm_node->state == IRDMA_CM_STATE_LISTENER_DESTROYED) { 3629 ret = -EINVAL; 3630 goto error; 3631 } 3632 3633 passive_state = atomic_add_return(1, &cm_node->passive_state); 3634 if (passive_state == IRDMA_SEND_RESET_EVENT) { 3635 ret = -ECONNRESET; 3636 goto error; 3637 } 3638 3639 buf_len = conn_param->private_data_len + IRDMA_MAX_IETF_SIZE; 3640 iwqp->ietf_mem.size = ALIGN(buf_len, 1); 3641 iwqp->ietf_mem.va = dma_alloc_coherent(dev->hw->device, 3642 iwqp->ietf_mem.size, 3643 &iwqp->ietf_mem.pa, GFP_KERNEL); 3644 if (!iwqp->ietf_mem.va) { 3645 ret = -ENOMEM; 3646 goto error; 3647 } 3648 3649 cm_node->pdata.size = conn_param->private_data_len; 3650 accept.addr = iwqp->ietf_mem.va; 3651 accept.size = irdma_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY); 3652 memcpy((u8 *)accept.addr + accept.size, conn_param->private_data, 3653 conn_param->private_data_len); 3654 3655 if (cm_node->dev->ws_add(iwqp->sc_qp.vsi, cm_node->user_pri)) { 3656 ret = -ENOMEM; 3657 goto error; 3658 } 3659 iwqp->sc_qp.user_pri = cm_node->user_pri; 3660 irdma_qp_add_qos(&iwqp->sc_qp); 3661 /* setup our first outgoing iWarp send WQE (the IETF frame response) */ 3662 iwpd = iwqp->iwpd; 3663 tagged_offset = (uintptr_t)iwqp->ietf_mem.va; 3664 ibmr = irdma_reg_phys_mr(&iwpd->ibpd, iwqp->ietf_mem.pa, buf_len, 3665 IB_ACCESS_LOCAL_WRITE, &tagged_offset); 3666 if (IS_ERR(ibmr)) { 3667 ret = -ENOMEM; 3668 goto error; 3669 } 3670 3671 ibmr->pd = &iwpd->ibpd; 3672 ibmr->device = iwpd->ibpd.device; 3673 iwqp->lsmm_mr = ibmr; 3674 if (iwqp->page) 3675 iwqp->sc_qp.qp_uk.sq_base = kmap_local_page(iwqp->page); 3676 3677 cm_node->lsmm_size = accept.size + conn_param->private_data_len; 3678 irdma_sc_send_lsmm(&iwqp->sc_qp, iwqp->ietf_mem.va, cm_node->lsmm_size, 3679 ibmr->lkey); 3680 3681 if (iwqp->page) 3682 kunmap_local(iwqp->sc_qp.qp_uk.sq_base); 3683 3684 iwqp->cm_id = cm_id; 3685 cm_node->cm_id = cm_id; 3686 3687 cm_id->provider_data = iwqp; 3688 iwqp->active_conn = 0; 3689 iwqp->cm_node = cm_node; 3690 cm_node->iwqp = iwqp; 3691 irdma_cm_init_tsa_conn(iwqp, cm_node); 3692 irdma_qp_add_ref(&iwqp->ibqp); 3693 cm_id->add_ref(cm_id); 3694 3695 attr.qp_state = IB_QPS_RTS; 3696 cm_node->qhash_set = false; 3697 cm_node->cm_core->cm_free_ah(cm_node); 3698 3699 irdma_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); 3700 if (dev->hw_attrs.uk_attrs.feature_flags & IRDMA_FEATURE_RTS_AE) { 3701 wait_ret = wait_event_interruptible_timeout(iwqp->waitq, 3702 iwqp->rts_ae_rcvd, 3703 IRDMA_MAX_TIMEOUT); 3704 if (!wait_ret) { 3705 ibdev_dbg(&iwdev->ibdev, 3706 "CM: Slow Connection: cm_node=%p, loc_port=%d, rem_port=%d, cm_id=%p\n", 3707 cm_node, cm_node->loc_port, 3708 cm_node->rem_port, cm_node->cm_id); 3709 ret = -ECONNRESET; 3710 goto error; 3711 } 3712 } 3713 3714 irdma_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0); 3715 cm_node->accelerated = true; 3716 complete(&cm_node->establish_comp); 3717 3718 if (cm_node->accept_pend) { 3719 atomic_dec(&cm_node->listener->pend_accepts_cnt); 3720 cm_node->accept_pend = 0; 3721 } 3722 3723 ibdev_dbg(&iwdev->ibdev, 3724 "CM: rem_port=0x%04x, loc_port=0x%04x rem_addr=%pI4 loc_addr=%pI4 cm_node=%p cm_id=%p qp_id = %d\n\n", 3725 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr, 3726 cm_node->loc_addr, cm_node, cm_id, ibqp->qp_num); 3727 cm_node->cm_core->stats_accepts++; 3728 3729 return 0; 3730 error: 3731 irdma_free_lsmm_rsrc(iwqp); 3732 irdma_rem_ref_cm_node(cm_node); 3733 3734 return ret; 3735 } 3736 3737 /** 3738 * irdma_reject - registered call for connection to be rejected 3739 * @cm_id: cm information for passive connection 3740 * @pdata: private data to be sent 3741 * @pdata_len: private data length 3742 */ 3743 int irdma_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len) 3744 { 3745 struct irdma_device *iwdev; 3746 struct irdma_cm_node *cm_node; 3747 3748 cm_node = cm_id->provider_data; 3749 cm_node->pdata.size = pdata_len; 3750 3751 trace_irdma_reject(cm_node, 0, NULL); 3752 3753 iwdev = to_iwdev(cm_id->device); 3754 if (!iwdev) 3755 return -EINVAL; 3756 3757 cm_node->cm_core->stats_rejects++; 3758 3759 if (pdata_len + sizeof(struct ietf_mpa_v2) > IRDMA_MAX_CM_BUF) 3760 return -EINVAL; 3761 3762 return irdma_cm_reject(cm_node, pdata, pdata_len); 3763 } 3764 3765 /** 3766 * irdma_connect - registered call for connection to be established 3767 * @cm_id: cm information for passive connection 3768 * @conn_param: Information about the connection 3769 */ 3770 int irdma_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) 3771 { 3772 struct ib_qp *ibqp; 3773 struct irdma_qp *iwqp; 3774 struct irdma_device *iwdev; 3775 struct irdma_cm_node *cm_node; 3776 struct irdma_cm_info cm_info; 3777 struct sockaddr_in *laddr; 3778 struct sockaddr_in *raddr; 3779 struct sockaddr_in6 *laddr6; 3780 struct sockaddr_in6 *raddr6; 3781 int ret = 0; 3782 3783 ibqp = irdma_get_qp(cm_id->device, conn_param->qpn); 3784 if (!ibqp) 3785 return -EINVAL; 3786 iwqp = to_iwqp(ibqp); 3787 if (!iwqp) 3788 return -EINVAL; 3789 iwdev = iwqp->iwdev; 3790 if (!iwdev) 3791 return -EINVAL; 3792 3793 laddr = (struct sockaddr_in *)&cm_id->m_local_addr; 3794 raddr = (struct sockaddr_in *)&cm_id->m_remote_addr; 3795 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr; 3796 raddr6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr; 3797 3798 if (!(laddr->sin_port) || !(raddr->sin_port)) 3799 return -EINVAL; 3800 3801 iwqp->active_conn = 1; 3802 iwqp->cm_id = NULL; 3803 cm_id->provider_data = iwqp; 3804 3805 /* set up the connection params for the node */ 3806 if (cm_id->remote_addr.ss_family == AF_INET) { 3807 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV4) 3808 return -EINVAL; 3809 3810 cm_info.ipv4 = true; 3811 memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr)); 3812 memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr)); 3813 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr); 3814 cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr); 3815 cm_info.loc_port = ntohs(laddr->sin_port); 3816 cm_info.rem_port = ntohs(raddr->sin_port); 3817 cm_info.vlan_id = irdma_get_vlan_ipv4(cm_info.loc_addr); 3818 } else { 3819 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV6) 3820 return -EINVAL; 3821 3822 cm_info.ipv4 = false; 3823 irdma_copy_ip_ntohl(cm_info.loc_addr, 3824 laddr6->sin6_addr.in6_u.u6_addr32); 3825 irdma_copy_ip_ntohl(cm_info.rem_addr, 3826 raddr6->sin6_addr.in6_u.u6_addr32); 3827 cm_info.loc_port = ntohs(laddr6->sin6_port); 3828 cm_info.rem_port = ntohs(raddr6->sin6_port); 3829 irdma_netdev_vlan_ipv6(cm_info.loc_addr, &cm_info.vlan_id, 3830 NULL); 3831 } 3832 cm_info.cm_id = cm_id; 3833 cm_info.qh_qpid = iwdev->vsi.ilq->qp_id; 3834 cm_info.tos = cm_id->tos; 3835 if (iwdev->vsi.dscp_mode) 3836 cm_info.user_pri = 3837 iwqp->sc_qp.vsi->dscp_map[irdma_tos2dscp(cm_info.tos)]; 3838 else 3839 cm_info.user_pri = rt_tos2priority(cm_id->tos); 3840 3841 if (iwqp->sc_qp.dev->ws_add(iwqp->sc_qp.vsi, cm_info.user_pri)) 3842 return -ENOMEM; 3843 iwqp->sc_qp.user_pri = cm_info.user_pri; 3844 irdma_qp_add_qos(&iwqp->sc_qp); 3845 ibdev_dbg(&iwdev->ibdev, "DCB: TOS:[%d] UP:[%d]\n", cm_id->tos, 3846 cm_info.user_pri); 3847 3848 trace_irdma_dcb_tos(iwdev, cm_id->tos, cm_info.user_pri); 3849 3850 ret = irdma_create_cm_node(&iwdev->cm_core, iwdev, conn_param, &cm_info, 3851 &cm_node); 3852 if (ret) 3853 return ret; 3854 ret = cm_node->cm_core->cm_create_ah(cm_node, true); 3855 if (ret) 3856 goto err; 3857 if (irdma_manage_qhash(iwdev, &cm_info, 3858 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 3859 IRDMA_QHASH_MANAGE_TYPE_ADD, NULL, true)) { 3860 ret = -EINVAL; 3861 goto err; 3862 } 3863 cm_node->qhash_set = true; 3864 3865 cm_node->apbvt_entry = irdma_add_apbvt(iwdev, cm_info.loc_port); 3866 if (!cm_node->apbvt_entry) { 3867 ret = -EINVAL; 3868 goto err; 3869 } 3870 3871 cm_node->apbvt_set = true; 3872 iwqp->cm_node = cm_node; 3873 cm_node->iwqp = iwqp; 3874 iwqp->cm_id = cm_id; 3875 irdma_qp_add_ref(&iwqp->ibqp); 3876 cm_id->add_ref(cm_id); 3877 3878 if (cm_node->state != IRDMA_CM_STATE_OFFLOADED) { 3879 cm_node->state = IRDMA_CM_STATE_SYN_SENT; 3880 ret = irdma_send_syn(cm_node, 0); 3881 if (ret) 3882 goto err; 3883 } 3884 3885 ibdev_dbg(&iwdev->ibdev, 3886 "CM: rem_port=0x%04x, loc_port=0x%04x rem_addr=%pI4 loc_addr=%pI4 cm_node=%p cm_id=%p qp_id = %d\n\n", 3887 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr, 3888 cm_node->loc_addr, cm_node, cm_id, ibqp->qp_num); 3889 3890 trace_irdma_connect(cm_node, 0, NULL); 3891 3892 return 0; 3893 3894 err: 3895 if (cm_info.ipv4) 3896 ibdev_dbg(&iwdev->ibdev, 3897 "CM: connect() FAILED: dest addr=%pI4", 3898 cm_info.rem_addr); 3899 else 3900 ibdev_dbg(&iwdev->ibdev, 3901 "CM: connect() FAILED: dest addr=%pI6", 3902 cm_info.rem_addr); 3903 irdma_rem_ref_cm_node(cm_node); 3904 iwdev->cm_core.stats_connect_errs++; 3905 3906 return ret; 3907 } 3908 3909 /** 3910 * irdma_create_listen - registered call creating listener 3911 * @cm_id: cm information for passive connection 3912 * @backlog: to max accept pending count 3913 */ 3914 int irdma_create_listen(struct iw_cm_id *cm_id, int backlog) 3915 { 3916 struct irdma_device *iwdev; 3917 struct irdma_cm_listener *cm_listen_node; 3918 struct irdma_cm_info cm_info = {}; 3919 struct sockaddr_in *laddr; 3920 struct sockaddr_in6 *laddr6; 3921 bool wildcard = false; 3922 int err; 3923 3924 iwdev = to_iwdev(cm_id->device); 3925 if (!iwdev) 3926 return -EINVAL; 3927 3928 laddr = (struct sockaddr_in *)&cm_id->m_local_addr; 3929 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr; 3930 cm_info.qh_qpid = iwdev->vsi.ilq->qp_id; 3931 3932 if (laddr->sin_family == AF_INET) { 3933 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV4) 3934 return -EINVAL; 3935 3936 cm_info.ipv4 = true; 3937 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr); 3938 cm_info.loc_port = ntohs(laddr->sin_port); 3939 3940 if (laddr->sin_addr.s_addr != htonl(INADDR_ANY)) { 3941 cm_info.vlan_id = irdma_get_vlan_ipv4(cm_info.loc_addr); 3942 } else { 3943 cm_info.vlan_id = 0xFFFF; 3944 wildcard = true; 3945 } 3946 } else { 3947 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV6) 3948 return -EINVAL; 3949 3950 cm_info.ipv4 = false; 3951 irdma_copy_ip_ntohl(cm_info.loc_addr, 3952 laddr6->sin6_addr.in6_u.u6_addr32); 3953 cm_info.loc_port = ntohs(laddr6->sin6_port); 3954 if (ipv6_addr_type(&laddr6->sin6_addr) != IPV6_ADDR_ANY) { 3955 irdma_netdev_vlan_ipv6(cm_info.loc_addr, 3956 &cm_info.vlan_id, NULL); 3957 } else { 3958 cm_info.vlan_id = 0xFFFF; 3959 wildcard = true; 3960 } 3961 } 3962 3963 if (cm_info.vlan_id >= VLAN_N_VID && iwdev->dcb_vlan_mode) 3964 cm_info.vlan_id = 0; 3965 cm_info.backlog = backlog; 3966 cm_info.cm_id = cm_id; 3967 3968 trace_irdma_create_listen(iwdev, &cm_info); 3969 3970 cm_listen_node = irdma_make_listen_node(&iwdev->cm_core, iwdev, 3971 &cm_info); 3972 if (!cm_listen_node) { 3973 ibdev_dbg(&iwdev->ibdev, 3974 "CM: cm_listen_node == NULL\n"); 3975 return -ENOMEM; 3976 } 3977 3978 cm_id->provider_data = cm_listen_node; 3979 3980 cm_listen_node->tos = cm_id->tos; 3981 if (iwdev->vsi.dscp_mode) 3982 cm_listen_node->user_pri = 3983 iwdev->vsi.dscp_map[irdma_tos2dscp(cm_id->tos)]; 3984 else 3985 cm_listen_node->user_pri = rt_tos2priority(cm_id->tos); 3986 cm_info.user_pri = cm_listen_node->user_pri; 3987 if (!cm_listen_node->reused_node) { 3988 if (wildcard) { 3989 err = irdma_add_mqh(iwdev, &cm_info, cm_listen_node); 3990 if (err) 3991 goto error; 3992 } else { 3993 err = irdma_manage_qhash(iwdev, &cm_info, 3994 IRDMA_QHASH_TYPE_TCP_SYN, 3995 IRDMA_QHASH_MANAGE_TYPE_ADD, 3996 NULL, true); 3997 if (err) 3998 goto error; 3999 4000 cm_listen_node->qhash_set = true; 4001 } 4002 4003 cm_listen_node->apbvt_entry = irdma_add_apbvt(iwdev, 4004 cm_info.loc_port); 4005 if (!cm_listen_node->apbvt_entry) 4006 goto error; 4007 } 4008 cm_id->add_ref(cm_id); 4009 cm_listen_node->cm_core->stats_listen_created++; 4010 ibdev_dbg(&iwdev->ibdev, 4011 "CM: loc_port=0x%04x loc_addr=%pI4 cm_listen_node=%p cm_id=%p qhash_set=%d vlan_id=%d\n", 4012 cm_listen_node->loc_port, cm_listen_node->loc_addr, 4013 cm_listen_node, cm_listen_node->cm_id, 4014 cm_listen_node->qhash_set, cm_listen_node->vlan_id); 4015 4016 return 0; 4017 4018 error: 4019 4020 irdma_cm_del_listen(&iwdev->cm_core, cm_listen_node, false); 4021 4022 return -EINVAL; 4023 } 4024 4025 /** 4026 * irdma_destroy_listen - registered call to destroy listener 4027 * @cm_id: cm information for passive connection 4028 */ 4029 int irdma_destroy_listen(struct iw_cm_id *cm_id) 4030 { 4031 struct irdma_device *iwdev; 4032 4033 iwdev = to_iwdev(cm_id->device); 4034 if (cm_id->provider_data) 4035 irdma_cm_del_listen(&iwdev->cm_core, cm_id->provider_data, 4036 true); 4037 else 4038 ibdev_dbg(&iwdev->ibdev, 4039 "CM: cm_id->provider_data was NULL\n"); 4040 4041 cm_id->rem_ref(cm_id); 4042 4043 return 0; 4044 } 4045 4046 /** 4047 * irdma_teardown_list_prep - add conn nodes slated for tear down to list 4048 * @cm_core: cm's core 4049 * @teardown_list: a list to which cm_node will be selected 4050 * @ipaddr: pointer to ip address 4051 * @nfo: pointer to cm_info structure instance 4052 * @disconnect_all: flag indicating disconnect all QPs 4053 */ 4054 static void irdma_teardown_list_prep(struct irdma_cm_core *cm_core, 4055 struct list_head *teardown_list, 4056 u32 *ipaddr, 4057 struct irdma_cm_info *nfo, 4058 bool disconnect_all) 4059 { 4060 struct irdma_cm_node *cm_node; 4061 int bkt; 4062 4063 hash_for_each_rcu(cm_core->cm_hash_tbl, bkt, cm_node, list) { 4064 if ((disconnect_all || 4065 (nfo->vlan_id == cm_node->vlan_id && 4066 !memcmp(cm_node->loc_addr, ipaddr, nfo->ipv4 ? 4 : 16))) && 4067 refcount_inc_not_zero(&cm_node->refcnt)) 4068 list_add(&cm_node->teardown_entry, teardown_list); 4069 } 4070 } 4071 4072 /** 4073 * irdma_cm_event_connected - handle connected active node 4074 * @event: the info for cm_node of connection 4075 */ 4076 static void irdma_cm_event_connected(struct irdma_cm_event *event) 4077 { 4078 struct irdma_qp *iwqp; 4079 struct irdma_device *iwdev; 4080 struct irdma_cm_node *cm_node; 4081 struct irdma_sc_dev *dev; 4082 struct ib_qp_attr attr = {}; 4083 struct iw_cm_id *cm_id; 4084 int status; 4085 bool read0; 4086 int wait_ret = 0; 4087 4088 cm_node = event->cm_node; 4089 cm_id = cm_node->cm_id; 4090 iwqp = cm_id->provider_data; 4091 iwdev = iwqp->iwdev; 4092 dev = &iwdev->rf->sc_dev; 4093 if (iwqp->sc_qp.qp_uk.destroy_pending) { 4094 status = -ETIMEDOUT; 4095 goto error; 4096 } 4097 4098 irdma_cm_init_tsa_conn(iwqp, cm_node); 4099 read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO); 4100 if (iwqp->page) 4101 iwqp->sc_qp.qp_uk.sq_base = kmap_local_page(iwqp->page); 4102 irdma_sc_send_rtt(&iwqp->sc_qp, read0); 4103 if (iwqp->page) 4104 kunmap_local(iwqp->sc_qp.qp_uk.sq_base); 4105 4106 attr.qp_state = IB_QPS_RTS; 4107 cm_node->qhash_set = false; 4108 irdma_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); 4109 if (dev->hw_attrs.uk_attrs.feature_flags & IRDMA_FEATURE_RTS_AE) { 4110 wait_ret = wait_event_interruptible_timeout(iwqp->waitq, 4111 iwqp->rts_ae_rcvd, 4112 IRDMA_MAX_TIMEOUT); 4113 if (!wait_ret) 4114 ibdev_dbg(&iwdev->ibdev, 4115 "CM: Slow Connection: cm_node=%p, loc_port=%d, rem_port=%d, cm_id=%p\n", 4116 cm_node, cm_node->loc_port, 4117 cm_node->rem_port, cm_node->cm_id); 4118 } 4119 4120 irdma_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 0); 4121 cm_node->accelerated = true; 4122 complete(&cm_node->establish_comp); 4123 cm_node->cm_core->cm_free_ah(cm_node); 4124 return; 4125 4126 error: 4127 iwqp->cm_id = NULL; 4128 cm_id->provider_data = NULL; 4129 irdma_send_cm_event(event->cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 4130 status); 4131 irdma_rem_ref_cm_node(event->cm_node); 4132 } 4133 4134 /** 4135 * irdma_cm_event_reset - handle reset 4136 * @event: the info for cm_node of connection 4137 */ 4138 static void irdma_cm_event_reset(struct irdma_cm_event *event) 4139 { 4140 struct irdma_cm_node *cm_node = event->cm_node; 4141 struct iw_cm_id *cm_id = cm_node->cm_id; 4142 struct irdma_qp *iwqp; 4143 4144 if (!cm_id) 4145 return; 4146 4147 iwqp = cm_id->provider_data; 4148 if (!iwqp) 4149 return; 4150 4151 ibdev_dbg(&cm_node->iwdev->ibdev, 4152 "CM: reset event %p - cm_id = %p\n", event->cm_node, cm_id); 4153 iwqp->cm_id = NULL; 4154 4155 irdma_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT, 4156 -ECONNRESET); 4157 irdma_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0); 4158 } 4159 4160 /** 4161 * irdma_cm_event_handler - send event to cm upper layer 4162 * @work: pointer of cm event info. 4163 */ 4164 static void irdma_cm_event_handler(struct work_struct *work) 4165 { 4166 struct irdma_cm_event *event = container_of(work, struct irdma_cm_event, event_work); 4167 struct irdma_cm_node *cm_node; 4168 4169 if (!event || !event->cm_node || !event->cm_node->cm_core) 4170 return; 4171 4172 cm_node = event->cm_node; 4173 trace_irdma_cm_event_handler(cm_node, event->type, NULL); 4174 4175 switch (event->type) { 4176 case IRDMA_CM_EVENT_MPA_REQ: 4177 irdma_send_cm_event(cm_node, cm_node->cm_id, 4178 IW_CM_EVENT_CONNECT_REQUEST, 0); 4179 break; 4180 case IRDMA_CM_EVENT_RESET: 4181 irdma_cm_event_reset(event); 4182 break; 4183 case IRDMA_CM_EVENT_CONNECTED: 4184 if (!event->cm_node->cm_id || 4185 event->cm_node->state != IRDMA_CM_STATE_OFFLOADED) 4186 break; 4187 irdma_cm_event_connected(event); 4188 break; 4189 case IRDMA_CM_EVENT_MPA_REJECT: 4190 if (!event->cm_node->cm_id || 4191 cm_node->state == IRDMA_CM_STATE_OFFLOADED) 4192 break; 4193 irdma_send_cm_event(cm_node, cm_node->cm_id, 4194 IW_CM_EVENT_CONNECT_REPLY, -ECONNREFUSED); 4195 break; 4196 case IRDMA_CM_EVENT_ABORTED: 4197 if (!event->cm_node->cm_id || 4198 event->cm_node->state == IRDMA_CM_STATE_OFFLOADED) 4199 break; 4200 irdma_event_connect_error(event); 4201 break; 4202 default: 4203 ibdev_dbg(&cm_node->iwdev->ibdev, 4204 "CM: bad event type = %d\n", event->type); 4205 break; 4206 } 4207 4208 irdma_rem_ref_cm_node(event->cm_node); 4209 kfree(event); 4210 } 4211 4212 /** 4213 * irdma_cm_post_event - queue event request for worker thread 4214 * @event: cm node's info for up event call 4215 */ 4216 static void irdma_cm_post_event(struct irdma_cm_event *event) 4217 { 4218 refcount_inc(&event->cm_node->refcnt); 4219 INIT_WORK(&event->event_work, irdma_cm_event_handler); 4220 queue_work(event->cm_node->cm_core->event_wq, &event->event_work); 4221 } 4222 4223 /** 4224 * irdma_cm_teardown_connections - teardown QPs 4225 * @iwdev: device pointer 4226 * @ipaddr: Pointer to IPv4 or IPv6 address 4227 * @nfo: Connection info 4228 * @disconnect_all: flag indicating disconnect all QPs 4229 * 4230 * teardown QPs where source or destination addr matches ip addr 4231 */ 4232 void irdma_cm_teardown_connections(struct irdma_device *iwdev, u32 *ipaddr, 4233 struct irdma_cm_info *nfo, 4234 bool disconnect_all) 4235 { 4236 struct irdma_cm_core *cm_core = &iwdev->cm_core; 4237 struct list_head *list_core_temp; 4238 struct list_head *list_node; 4239 struct irdma_cm_node *cm_node; 4240 struct list_head teardown_list; 4241 struct ib_qp_attr attr; 4242 4243 INIT_LIST_HEAD(&teardown_list); 4244 4245 rcu_read_lock(); 4246 irdma_teardown_list_prep(cm_core, &teardown_list, ipaddr, nfo, disconnect_all); 4247 rcu_read_unlock(); 4248 4249 list_for_each_safe (list_node, list_core_temp, &teardown_list) { 4250 cm_node = container_of(list_node, struct irdma_cm_node, 4251 teardown_entry); 4252 attr.qp_state = IB_QPS_ERR; 4253 irdma_modify_qp(&cm_node->iwqp->ibqp, &attr, IB_QP_STATE, NULL); 4254 if (iwdev->rf->reset) 4255 irdma_cm_disconn(cm_node->iwqp); 4256 irdma_rem_ref_cm_node(cm_node); 4257 } 4258 } 4259 4260 /** 4261 * irdma_qhash_ctrl - enable/disable qhash for list 4262 * @iwdev: device pointer 4263 * @parent_listen_node: parent listen node 4264 * @nfo: cm info node 4265 * @ipaddr: Pointer to IPv4 or IPv6 address 4266 * @ipv4: flag indicating IPv4 when true 4267 * @ifup: flag indicating interface up when true 4268 * 4269 * Enables or disables the qhash for the node in the child 4270 * listen list that matches ipaddr. If no matching IP was found 4271 * it will allocate and add a new child listen node to the 4272 * parent listen node. The listen_list_lock is assumed to be 4273 * held when called. 4274 */ 4275 static void irdma_qhash_ctrl(struct irdma_device *iwdev, 4276 struct irdma_cm_listener *parent_listen_node, 4277 struct irdma_cm_info *nfo, u32 *ipaddr, bool ipv4, 4278 bool ifup) 4279 { 4280 struct list_head *child_listen_list = &parent_listen_node->child_listen_list; 4281 struct irdma_cm_listener *child_listen_node; 4282 struct list_head *pos, *tpos; 4283 bool node_allocated = false; 4284 enum irdma_quad_hash_manage_type op = ifup ? 4285 IRDMA_QHASH_MANAGE_TYPE_ADD : 4286 IRDMA_QHASH_MANAGE_TYPE_DELETE; 4287 int err; 4288 4289 list_for_each_safe (pos, tpos, child_listen_list) { 4290 child_listen_node = list_entry(pos, struct irdma_cm_listener, 4291 child_listen_list); 4292 if (!memcmp(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16)) 4293 goto set_qhash; 4294 } 4295 4296 /* if not found then add a child listener if interface is going up */ 4297 if (!ifup) 4298 return; 4299 child_listen_node = kmemdup(parent_listen_node, 4300 sizeof(*child_listen_node), GFP_ATOMIC); 4301 if (!child_listen_node) 4302 return; 4303 4304 node_allocated = true; 4305 memcpy(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16); 4306 4307 set_qhash: 4308 memcpy(nfo->loc_addr, child_listen_node->loc_addr, 4309 sizeof(nfo->loc_addr)); 4310 nfo->vlan_id = child_listen_node->vlan_id; 4311 err = irdma_manage_qhash(iwdev, nfo, IRDMA_QHASH_TYPE_TCP_SYN, op, NULL, 4312 false); 4313 if (!err) { 4314 child_listen_node->qhash_set = ifup; 4315 if (node_allocated) 4316 list_add(&child_listen_node->child_listen_list, 4317 &parent_listen_node->child_listen_list); 4318 } else if (node_allocated) { 4319 kfree(child_listen_node); 4320 } 4321 } 4322 4323 /** 4324 * irdma_if_notify - process an ifdown on an interface 4325 * @iwdev: device pointer 4326 * @netdev: network device structure 4327 * @ipaddr: Pointer to IPv4 or IPv6 address 4328 * @ipv4: flag indicating IPv4 when true 4329 * @ifup: flag indicating interface up when true 4330 */ 4331 void irdma_if_notify(struct irdma_device *iwdev, struct net_device *netdev, 4332 u32 *ipaddr, bool ipv4, bool ifup) 4333 { 4334 struct irdma_cm_core *cm_core = &iwdev->cm_core; 4335 unsigned long flags; 4336 struct irdma_cm_listener *listen_node; 4337 static const u32 ip_zero[4] = { 0, 0, 0, 0 }; 4338 struct irdma_cm_info nfo = {}; 4339 u16 vlan_id = rdma_vlan_dev_vlan_id(netdev); 4340 enum irdma_quad_hash_manage_type op = ifup ? 4341 IRDMA_QHASH_MANAGE_TYPE_ADD : 4342 IRDMA_QHASH_MANAGE_TYPE_DELETE; 4343 4344 nfo.vlan_id = vlan_id; 4345 nfo.ipv4 = ipv4; 4346 nfo.qh_qpid = 1; 4347 4348 /* Disable or enable qhash for listeners */ 4349 spin_lock_irqsave(&cm_core->listen_list_lock, flags); 4350 list_for_each_entry (listen_node, &cm_core->listen_list, list) { 4351 if (vlan_id != listen_node->vlan_id || 4352 (memcmp(listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16) && 4353 memcmp(listen_node->loc_addr, ip_zero, ipv4 ? 4 : 16))) 4354 continue; 4355 4356 memcpy(nfo.loc_addr, listen_node->loc_addr, 4357 sizeof(nfo.loc_addr)); 4358 nfo.loc_port = listen_node->loc_port; 4359 nfo.user_pri = listen_node->user_pri; 4360 if (!list_empty(&listen_node->child_listen_list)) { 4361 irdma_qhash_ctrl(iwdev, listen_node, &nfo, ipaddr, ipv4, 4362 ifup); 4363 } else if (memcmp(listen_node->loc_addr, ip_zero, 4364 ipv4 ? 4 : 16)) { 4365 if (!irdma_manage_qhash(iwdev, &nfo, 4366 IRDMA_QHASH_TYPE_TCP_SYN, op, 4367 NULL, false)) 4368 listen_node->qhash_set = ifup; 4369 } 4370 } 4371 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); 4372 4373 /* disconnect any connected qp's on ifdown */ 4374 if (!ifup) 4375 irdma_cm_teardown_connections(iwdev, ipaddr, &nfo, false); 4376 } 4377