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, pktsize); 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 * @dst_port: listener tcp port num 1462 * @vlan_id: virtual LAN ID 1463 * @listener_state: state to match with listen node's 1464 */ 1465 static struct irdma_cm_listener * 1466 irdma_find_listener(struct irdma_cm_core *cm_core, u32 *dst_addr, u16 dst_port, 1467 u16 vlan_id, enum irdma_cm_listener_state listener_state) 1468 { 1469 struct irdma_cm_listener *listen_node; 1470 static const u32 ip_zero[4] = { 0, 0, 0, 0 }; 1471 u32 listen_addr[4]; 1472 u16 listen_port; 1473 unsigned long flags; 1474 1475 /* walk list and find cm_node associated with this session ID */ 1476 spin_lock_irqsave(&cm_core->listen_list_lock, flags); 1477 list_for_each_entry (listen_node, &cm_core->listen_list, list) { 1478 memcpy(listen_addr, listen_node->loc_addr, sizeof(listen_addr)); 1479 listen_port = listen_node->loc_port; 1480 /* compare node pair, return node handle if a match */ 1481 if ((!memcmp(listen_addr, dst_addr, sizeof(listen_addr)) || 1482 !memcmp(listen_addr, ip_zero, sizeof(listen_addr))) && 1483 listen_port == dst_port && 1484 vlan_id == listen_node->vlan_id && 1485 (listener_state & listen_node->listener_state)) { 1486 refcount_inc(&listen_node->refcnt); 1487 spin_unlock_irqrestore(&cm_core->listen_list_lock, 1488 flags); 1489 trace_irdma_find_listener(listen_node); 1490 return listen_node; 1491 } 1492 } 1493 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); 1494 1495 return NULL; 1496 } 1497 1498 /** 1499 * irdma_del_multiple_qhash - Remove qhash and child listens 1500 * @iwdev: iWarp device 1501 * @cm_info: CM info for parent listen node 1502 * @cm_parent_listen_node: The parent listen node 1503 */ 1504 static enum irdma_status_code 1505 irdma_del_multiple_qhash(struct irdma_device *iwdev, 1506 struct irdma_cm_info *cm_info, 1507 struct irdma_cm_listener *cm_parent_listen_node) 1508 { 1509 struct irdma_cm_listener *child_listen_node; 1510 enum irdma_status_code ret = IRDMA_ERR_CFG; 1511 struct list_head *pos, *tpos; 1512 unsigned long flags; 1513 1514 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags); 1515 list_for_each_safe (pos, tpos, 1516 &cm_parent_listen_node->child_listen_list) { 1517 child_listen_node = list_entry(pos, struct irdma_cm_listener, 1518 child_listen_list); 1519 if (child_listen_node->ipv4) 1520 ibdev_dbg(&iwdev->ibdev, 1521 "CM: removing child listen for IP=%pI4, port=%d, vlan=%d\n", 1522 child_listen_node->loc_addr, 1523 child_listen_node->loc_port, 1524 child_listen_node->vlan_id); 1525 else 1526 ibdev_dbg(&iwdev->ibdev, 1527 "CM: removing child listen for IP=%pI6, port=%d, vlan=%d\n", 1528 child_listen_node->loc_addr, 1529 child_listen_node->loc_port, 1530 child_listen_node->vlan_id); 1531 trace_irdma_del_multiple_qhash(child_listen_node); 1532 list_del(pos); 1533 memcpy(cm_info->loc_addr, child_listen_node->loc_addr, 1534 sizeof(cm_info->loc_addr)); 1535 cm_info->vlan_id = child_listen_node->vlan_id; 1536 if (child_listen_node->qhash_set) { 1537 ret = irdma_manage_qhash(iwdev, cm_info, 1538 IRDMA_QHASH_TYPE_TCP_SYN, 1539 IRDMA_QHASH_MANAGE_TYPE_DELETE, 1540 NULL, false); 1541 child_listen_node->qhash_set = false; 1542 } else { 1543 ret = 0; 1544 } 1545 ibdev_dbg(&iwdev->ibdev, 1546 "CM: Child listen node freed = %p\n", 1547 child_listen_node); 1548 kfree(child_listen_node); 1549 cm_parent_listen_node->cm_core->stats_listen_nodes_destroyed++; 1550 } 1551 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); 1552 1553 return ret; 1554 } 1555 1556 /** 1557 * irdma_netdev_vlan_ipv6 - Gets the netdev and mac 1558 * @addr: local IPv6 address 1559 * @vlan_id: vlan id for the given IPv6 address 1560 * @mac: mac address for the given IPv6 address 1561 * 1562 * Returns the net_device of the IPv6 address and also sets the 1563 * vlan id and mac for that address. 1564 */ 1565 struct net_device *irdma_netdev_vlan_ipv6(u32 *addr, u16 *vlan_id, u8 *mac) 1566 { 1567 struct net_device *ip_dev = NULL; 1568 struct in6_addr laddr6; 1569 1570 if (!IS_ENABLED(CONFIG_IPV6)) 1571 return NULL; 1572 1573 irdma_copy_ip_htonl(laddr6.in6_u.u6_addr32, addr); 1574 if (vlan_id) 1575 *vlan_id = 0xFFFF; /* Match rdma_vlan_dev_vlan_id() */ 1576 if (mac) 1577 eth_zero_addr(mac); 1578 1579 rcu_read_lock(); 1580 for_each_netdev_rcu (&init_net, ip_dev) { 1581 if (ipv6_chk_addr(&init_net, &laddr6, ip_dev, 1)) { 1582 if (vlan_id) 1583 *vlan_id = rdma_vlan_dev_vlan_id(ip_dev); 1584 if (ip_dev->dev_addr && mac) 1585 ether_addr_copy(mac, ip_dev->dev_addr); 1586 break; 1587 } 1588 } 1589 rcu_read_unlock(); 1590 1591 return ip_dev; 1592 } 1593 1594 /** 1595 * irdma_get_vlan_ipv4 - Returns the vlan_id for IPv4 address 1596 * @addr: local IPv4 address 1597 */ 1598 u16 irdma_get_vlan_ipv4(u32 *addr) 1599 { 1600 struct net_device *netdev; 1601 u16 vlan_id = 0xFFFF; 1602 1603 netdev = ip_dev_find(&init_net, htonl(addr[0])); 1604 if (netdev) { 1605 vlan_id = rdma_vlan_dev_vlan_id(netdev); 1606 dev_put(netdev); 1607 } 1608 1609 return vlan_id; 1610 } 1611 1612 /** 1613 * irdma_add_mqh_6 - Adds multiple qhashes for IPv6 1614 * @iwdev: iWarp device 1615 * @cm_info: CM info for parent listen node 1616 * @cm_parent_listen_node: The parent listen node 1617 * 1618 * Adds a qhash and a child listen node for every IPv6 address 1619 * on the adapter and adds the associated qhash filter 1620 */ 1621 static enum irdma_status_code 1622 irdma_add_mqh_6(struct irdma_device *iwdev, struct irdma_cm_info *cm_info, 1623 struct irdma_cm_listener *cm_parent_listen_node) 1624 { 1625 struct net_device *ip_dev; 1626 struct inet6_dev *idev; 1627 struct inet6_ifaddr *ifp, *tmp; 1628 enum irdma_status_code ret = 0; 1629 struct irdma_cm_listener *child_listen_node; 1630 unsigned long flags; 1631 1632 rtnl_lock(); 1633 for_each_netdev(&init_net, ip_dev) { 1634 if (!(ip_dev->flags & IFF_UP)) 1635 continue; 1636 1637 if (((rdma_vlan_dev_vlan_id(ip_dev) >= VLAN_N_VID) || 1638 (rdma_vlan_dev_real_dev(ip_dev) != iwdev->netdev)) && 1639 ip_dev != iwdev->netdev) 1640 continue; 1641 1642 idev = __in6_dev_get(ip_dev); 1643 if (!idev) { 1644 ibdev_dbg(&iwdev->ibdev, "CM: idev == NULL\n"); 1645 break; 1646 } 1647 list_for_each_entry_safe (ifp, tmp, &idev->addr_list, if_list) { 1648 ibdev_dbg(&iwdev->ibdev, "CM: IP=%pI6, vlan_id=%d, MAC=%pM\n", 1649 &ifp->addr, rdma_vlan_dev_vlan_id(ip_dev), 1650 ip_dev->dev_addr); 1651 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_KERNEL); 1652 ibdev_dbg(&iwdev->ibdev, "CM: Allocating child listener %p\n", 1653 child_listen_node); 1654 if (!child_listen_node) { 1655 ibdev_dbg(&iwdev->ibdev, "CM: listener memory allocation\n"); 1656 ret = IRDMA_ERR_NO_MEMORY; 1657 goto exit; 1658 } 1659 1660 cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev); 1661 cm_parent_listen_node->vlan_id = cm_info->vlan_id; 1662 memcpy(child_listen_node, cm_parent_listen_node, 1663 sizeof(*child_listen_node)); 1664 irdma_copy_ip_ntohl(child_listen_node->loc_addr, 1665 ifp->addr.in6_u.u6_addr32); 1666 memcpy(cm_info->loc_addr, child_listen_node->loc_addr, 1667 sizeof(cm_info->loc_addr)); 1668 ret = irdma_manage_qhash(iwdev, cm_info, 1669 IRDMA_QHASH_TYPE_TCP_SYN, 1670 IRDMA_QHASH_MANAGE_TYPE_ADD, 1671 NULL, true); 1672 if (ret) { 1673 kfree(child_listen_node); 1674 continue; 1675 } 1676 1677 trace_irdma_add_mqh_6(iwdev, child_listen_node, 1678 ip_dev->dev_addr); 1679 1680 child_listen_node->qhash_set = true; 1681 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags); 1682 list_add(&child_listen_node->child_listen_list, 1683 &cm_parent_listen_node->child_listen_list); 1684 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); 1685 cm_parent_listen_node->cm_core->stats_listen_nodes_created++; 1686 } 1687 } 1688 exit: 1689 rtnl_unlock(); 1690 1691 return ret; 1692 } 1693 1694 /** 1695 * irdma_add_mqh_4 - Adds multiple qhashes for IPv4 1696 * @iwdev: iWarp device 1697 * @cm_info: CM info for parent listen node 1698 * @cm_parent_listen_node: The parent listen node 1699 * 1700 * Adds a qhash and a child listen node for every IPv4 address 1701 * on the adapter and adds the associated qhash filter 1702 */ 1703 static enum irdma_status_code 1704 irdma_add_mqh_4(struct irdma_device *iwdev, struct irdma_cm_info *cm_info, 1705 struct irdma_cm_listener *cm_parent_listen_node) 1706 { 1707 struct net_device *ip_dev; 1708 struct in_device *idev; 1709 struct irdma_cm_listener *child_listen_node; 1710 enum irdma_status_code ret = 0; 1711 unsigned long flags; 1712 const struct in_ifaddr *ifa; 1713 1714 rtnl_lock(); 1715 for_each_netdev(&init_net, ip_dev) { 1716 if (!(ip_dev->flags & IFF_UP)) 1717 continue; 1718 1719 if (((rdma_vlan_dev_vlan_id(ip_dev) >= VLAN_N_VID) || 1720 (rdma_vlan_dev_real_dev(ip_dev) != iwdev->netdev)) && 1721 ip_dev != iwdev->netdev) 1722 continue; 1723 1724 idev = in_dev_get(ip_dev); 1725 in_dev_for_each_ifa_rtnl(ifa, idev) { 1726 ibdev_dbg(&iwdev->ibdev, 1727 "CM: Allocating child CM Listener forIP=%pI4, vlan_id=%d, MAC=%pM\n", 1728 &ifa->ifa_address, rdma_vlan_dev_vlan_id(ip_dev), 1729 ip_dev->dev_addr); 1730 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_KERNEL); 1731 cm_parent_listen_node->cm_core->stats_listen_nodes_created++; 1732 ibdev_dbg(&iwdev->ibdev, "CM: Allocating child listener %p\n", 1733 child_listen_node); 1734 if (!child_listen_node) { 1735 ibdev_dbg(&iwdev->ibdev, "CM: listener memory allocation\n"); 1736 in_dev_put(idev); 1737 ret = IRDMA_ERR_NO_MEMORY; 1738 goto exit; 1739 } 1740 1741 cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev); 1742 cm_parent_listen_node->vlan_id = cm_info->vlan_id; 1743 memcpy(child_listen_node, cm_parent_listen_node, 1744 sizeof(*child_listen_node)); 1745 child_listen_node->loc_addr[0] = 1746 ntohl(ifa->ifa_address); 1747 memcpy(cm_info->loc_addr, child_listen_node->loc_addr, 1748 sizeof(cm_info->loc_addr)); 1749 ret = irdma_manage_qhash(iwdev, cm_info, 1750 IRDMA_QHASH_TYPE_TCP_SYN, 1751 IRDMA_QHASH_MANAGE_TYPE_ADD, 1752 NULL, true); 1753 if (ret) { 1754 kfree(child_listen_node); 1755 cm_parent_listen_node->cm_core 1756 ->stats_listen_nodes_created--; 1757 continue; 1758 } 1759 1760 trace_irdma_add_mqh_4(iwdev, child_listen_node, 1761 ip_dev->dev_addr); 1762 1763 child_listen_node->qhash_set = true; 1764 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, 1765 flags); 1766 list_add(&child_listen_node->child_listen_list, 1767 &cm_parent_listen_node->child_listen_list); 1768 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); 1769 } 1770 in_dev_put(idev); 1771 } 1772 exit: 1773 rtnl_unlock(); 1774 1775 return ret; 1776 } 1777 1778 /** 1779 * irdma_add_mqh - Adds multiple qhashes 1780 * @iwdev: iWarp device 1781 * @cm_info: CM info for parent listen node 1782 * @cm_listen_node: The parent listen node 1783 */ 1784 static enum irdma_status_code 1785 irdma_add_mqh(struct irdma_device *iwdev, struct irdma_cm_info *cm_info, 1786 struct irdma_cm_listener *cm_listen_node) 1787 { 1788 if (cm_info->ipv4) 1789 return irdma_add_mqh_4(iwdev, cm_info, cm_listen_node); 1790 else 1791 return irdma_add_mqh_6(iwdev, cm_info, cm_listen_node); 1792 } 1793 1794 /** 1795 * irdma_reset_list_prep - add connection nodes slated for reset to list 1796 * @cm_core: cm's core 1797 * @listener: pointer to listener node 1798 * @reset_list: a list to which cm_node will be selected 1799 */ 1800 static void irdma_reset_list_prep(struct irdma_cm_core *cm_core, 1801 struct irdma_cm_listener *listener, 1802 struct list_head *reset_list) 1803 { 1804 struct irdma_cm_node *cm_node; 1805 int bkt; 1806 1807 hash_for_each_rcu(cm_core->cm_hash_tbl, bkt, cm_node, list) { 1808 if (cm_node->listener == listener && 1809 !cm_node->accelerated && 1810 refcount_inc_not_zero(&cm_node->refcnt)) 1811 list_add(&cm_node->reset_entry, reset_list); 1812 } 1813 } 1814 1815 /** 1816 * irdma_dec_refcnt_listen - delete listener and associated cm nodes 1817 * @cm_core: cm's core 1818 * @listener: pointer to listener node 1819 * @free_hanging_nodes: to free associated cm_nodes 1820 * @apbvt_del: flag to delete the apbvt 1821 */ 1822 static int irdma_dec_refcnt_listen(struct irdma_cm_core *cm_core, 1823 struct irdma_cm_listener *listener, 1824 int free_hanging_nodes, bool apbvt_del) 1825 { 1826 int err; 1827 struct list_head *list_pos; 1828 struct list_head *list_temp; 1829 struct irdma_cm_node *cm_node; 1830 struct list_head reset_list; 1831 struct irdma_cm_info nfo; 1832 enum irdma_cm_node_state old_state; 1833 unsigned long flags; 1834 1835 trace_irdma_dec_refcnt_listen(listener, __builtin_return_address(0)); 1836 /* free non-accelerated child nodes for this listener */ 1837 INIT_LIST_HEAD(&reset_list); 1838 if (free_hanging_nodes) { 1839 rcu_read_lock(); 1840 irdma_reset_list_prep(cm_core, listener, &reset_list); 1841 rcu_read_unlock(); 1842 } 1843 1844 list_for_each_safe (list_pos, list_temp, &reset_list) { 1845 cm_node = container_of(list_pos, struct irdma_cm_node, 1846 reset_entry); 1847 if (cm_node->state >= IRDMA_CM_STATE_FIN_WAIT1) { 1848 irdma_rem_ref_cm_node(cm_node); 1849 continue; 1850 } 1851 1852 irdma_cleanup_retrans_entry(cm_node); 1853 err = irdma_send_reset(cm_node); 1854 if (err) { 1855 cm_node->state = IRDMA_CM_STATE_CLOSED; 1856 ibdev_dbg(&cm_node->iwdev->ibdev, 1857 "CM: send reset failed\n"); 1858 } else { 1859 old_state = cm_node->state; 1860 cm_node->state = IRDMA_CM_STATE_LISTENER_DESTROYED; 1861 if (old_state != IRDMA_CM_STATE_MPAREQ_RCVD) 1862 irdma_rem_ref_cm_node(cm_node); 1863 } 1864 } 1865 1866 if (refcount_dec_and_test(&listener->refcnt)) { 1867 spin_lock_irqsave(&cm_core->listen_list_lock, flags); 1868 list_del(&listener->list); 1869 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); 1870 1871 if (apbvt_del) 1872 irdma_del_apbvt(listener->iwdev, 1873 listener->apbvt_entry); 1874 memcpy(nfo.loc_addr, listener->loc_addr, sizeof(nfo.loc_addr)); 1875 nfo.loc_port = listener->loc_port; 1876 nfo.ipv4 = listener->ipv4; 1877 nfo.vlan_id = listener->vlan_id; 1878 nfo.user_pri = listener->user_pri; 1879 nfo.qh_qpid = listener->iwdev->vsi.ilq->qp_id; 1880 1881 if (!list_empty(&listener->child_listen_list)) { 1882 irdma_del_multiple_qhash(listener->iwdev, &nfo, 1883 listener); 1884 } else { 1885 if (listener->qhash_set) 1886 irdma_manage_qhash(listener->iwdev, 1887 &nfo, 1888 IRDMA_QHASH_TYPE_TCP_SYN, 1889 IRDMA_QHASH_MANAGE_TYPE_DELETE, 1890 NULL, false); 1891 } 1892 1893 cm_core->stats_listen_destroyed++; 1894 cm_core->stats_listen_nodes_destroyed++; 1895 ibdev_dbg(&listener->iwdev->ibdev, 1896 "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", 1897 listener->loc_port, listener->loc_addr, listener, 1898 listener->cm_id, listener->qhash_set, 1899 listener->vlan_id, apbvt_del); 1900 kfree(listener); 1901 listener = NULL; 1902 return 0; 1903 } 1904 1905 return -EINVAL; 1906 } 1907 1908 /** 1909 * irdma_cm_del_listen - delete a listener 1910 * @cm_core: cm's core 1911 * @listener: passive connection's listener 1912 * @apbvt_del: flag to delete apbvt 1913 */ 1914 static int irdma_cm_del_listen(struct irdma_cm_core *cm_core, 1915 struct irdma_cm_listener *listener, 1916 bool apbvt_del) 1917 { 1918 listener->listener_state = IRDMA_CM_LISTENER_PASSIVE_STATE; 1919 listener->cm_id = NULL; 1920 1921 return irdma_dec_refcnt_listen(cm_core, listener, 1, apbvt_del); 1922 } 1923 1924 /** 1925 * irdma_addr_resolve_neigh - resolve neighbor address 1926 * @iwdev: iwarp device structure 1927 * @src_ip: local ip address 1928 * @dst_ip: remote ip address 1929 * @arpindex: if there is an arp entry 1930 */ 1931 static int irdma_addr_resolve_neigh(struct irdma_device *iwdev, u32 src_ip, 1932 u32 dst_ip, int arpindex) 1933 { 1934 struct rtable *rt; 1935 struct neighbour *neigh; 1936 int rc = arpindex; 1937 __be32 dst_ipaddr = htonl(dst_ip); 1938 __be32 src_ipaddr = htonl(src_ip); 1939 1940 rt = ip_route_output(&init_net, dst_ipaddr, src_ipaddr, 0, 0); 1941 if (IS_ERR(rt)) { 1942 ibdev_dbg(&iwdev->ibdev, "CM: ip_route_output fail\n"); 1943 return -EINVAL; 1944 } 1945 1946 neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr); 1947 if (!neigh) 1948 goto exit; 1949 1950 if (neigh->nud_state & NUD_VALID) 1951 rc = irdma_add_arp(iwdev->rf, &dst_ip, true, neigh->ha); 1952 else 1953 neigh_event_send(neigh, NULL); 1954 if (neigh) 1955 neigh_release(neigh); 1956 exit: 1957 ip_rt_put(rt); 1958 1959 return rc; 1960 } 1961 1962 /** 1963 * irdma_get_dst_ipv6 - get destination cache entry via ipv6 lookup 1964 * @src_addr: local ipv6 sock address 1965 * @dst_addr: destination ipv6 sock address 1966 */ 1967 static struct dst_entry *irdma_get_dst_ipv6(struct sockaddr_in6 *src_addr, 1968 struct sockaddr_in6 *dst_addr) 1969 { 1970 struct dst_entry *dst = NULL; 1971 1972 if ((IS_ENABLED(CONFIG_IPV6))) { 1973 struct flowi6 fl6 = {}; 1974 1975 fl6.daddr = dst_addr->sin6_addr; 1976 fl6.saddr = src_addr->sin6_addr; 1977 if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL) 1978 fl6.flowi6_oif = dst_addr->sin6_scope_id; 1979 1980 dst = ip6_route_output(&init_net, NULL, &fl6); 1981 } 1982 1983 return dst; 1984 } 1985 1986 /** 1987 * irdma_addr_resolve_neigh_ipv6 - resolve neighbor ipv6 address 1988 * @iwdev: iwarp device structure 1989 * @src: local ip address 1990 * @dest: remote ip address 1991 * @arpindex: if there is an arp entry 1992 */ 1993 static int irdma_addr_resolve_neigh_ipv6(struct irdma_device *iwdev, u32 *src, 1994 u32 *dest, int arpindex) 1995 { 1996 struct neighbour *neigh; 1997 int rc = arpindex; 1998 struct dst_entry *dst; 1999 struct sockaddr_in6 dst_addr = {}; 2000 struct sockaddr_in6 src_addr = {}; 2001 2002 dst_addr.sin6_family = AF_INET6; 2003 irdma_copy_ip_htonl(dst_addr.sin6_addr.in6_u.u6_addr32, dest); 2004 src_addr.sin6_family = AF_INET6; 2005 irdma_copy_ip_htonl(src_addr.sin6_addr.in6_u.u6_addr32, src); 2006 dst = irdma_get_dst_ipv6(&src_addr, &dst_addr); 2007 if (!dst || dst->error) { 2008 if (dst) { 2009 dst_release(dst); 2010 ibdev_dbg(&iwdev->ibdev, 2011 "CM: ip6_route_output returned dst->error = %d\n", 2012 dst->error); 2013 } 2014 return -EINVAL; 2015 } 2016 2017 neigh = dst_neigh_lookup(dst, dst_addr.sin6_addr.in6_u.u6_addr32); 2018 if (!neigh) 2019 goto exit; 2020 2021 ibdev_dbg(&iwdev->ibdev, "CM: dst_neigh_lookup MAC=%pM\n", 2022 neigh->ha); 2023 2024 trace_irdma_addr_resolve(iwdev, neigh->ha); 2025 2026 if (neigh->nud_state & NUD_VALID) 2027 rc = irdma_add_arp(iwdev->rf, dest, false, neigh->ha); 2028 else 2029 neigh_event_send(neigh, NULL); 2030 if (neigh) 2031 neigh_release(neigh); 2032 exit: 2033 dst_release(dst); 2034 2035 return rc; 2036 } 2037 2038 /** 2039 * irdma_find_node - find a cm node that matches the reference cm node 2040 * @cm_core: cm's core 2041 * @rem_port: remote tcp port num 2042 * @rem_addr: remote ip addr 2043 * @loc_port: local tcp port num 2044 * @loc_addr: local ip addr 2045 * @vlan_id: local VLAN ID 2046 */ 2047 struct irdma_cm_node *irdma_find_node(struct irdma_cm_core *cm_core, 2048 u16 rem_port, u32 *rem_addr, u16 loc_port, 2049 u32 *loc_addr, u16 vlan_id) 2050 { 2051 struct irdma_cm_node *cm_node; 2052 u32 key = (rem_port << 16) | loc_port; 2053 2054 rcu_read_lock(); 2055 hash_for_each_possible_rcu(cm_core->cm_hash_tbl, cm_node, list, key) { 2056 if (cm_node->vlan_id == vlan_id && 2057 cm_node->loc_port == loc_port && cm_node->rem_port == rem_port && 2058 !memcmp(cm_node->loc_addr, loc_addr, sizeof(cm_node->loc_addr)) && 2059 !memcmp(cm_node->rem_addr, rem_addr, sizeof(cm_node->rem_addr))) { 2060 if (!refcount_inc_not_zero(&cm_node->refcnt)) 2061 goto exit; 2062 rcu_read_unlock(); 2063 trace_irdma_find_node(cm_node, 0, NULL); 2064 return cm_node; 2065 } 2066 } 2067 2068 exit: 2069 rcu_read_unlock(); 2070 2071 /* no owner node */ 2072 return NULL; 2073 } 2074 2075 /** 2076 * irdma_add_hte_node - add a cm node to the hash table 2077 * @cm_core: cm's core 2078 * @cm_node: connection's node 2079 */ 2080 static void irdma_add_hte_node(struct irdma_cm_core *cm_core, 2081 struct irdma_cm_node *cm_node) 2082 { 2083 unsigned long flags; 2084 u32 key = (cm_node->rem_port << 16) | cm_node->loc_port; 2085 2086 spin_lock_irqsave(&cm_core->ht_lock, flags); 2087 hash_add_rcu(cm_core->cm_hash_tbl, &cm_node->list, key); 2088 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 2089 } 2090 2091 /** 2092 * irdma_ipv4_is_lpb - check if loopback 2093 * @loc_addr: local addr to compare 2094 * @rem_addr: remote address 2095 */ 2096 bool irdma_ipv4_is_lpb(u32 loc_addr, u32 rem_addr) 2097 { 2098 return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr); 2099 } 2100 2101 /** 2102 * irdma_ipv6_is_lpb - check if loopback 2103 * @loc_addr: local addr to compare 2104 * @rem_addr: remote address 2105 */ 2106 bool irdma_ipv6_is_lpb(u32 *loc_addr, u32 *rem_addr) 2107 { 2108 struct in6_addr raddr6; 2109 2110 irdma_copy_ip_htonl(raddr6.in6_u.u6_addr32, rem_addr); 2111 2112 return !memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6); 2113 } 2114 2115 /** 2116 * irdma_cm_create_ah - create a cm address handle 2117 * @cm_node: The connection manager node to create AH for 2118 * @wait: Provides option to wait for ah creation or not 2119 */ 2120 static int irdma_cm_create_ah(struct irdma_cm_node *cm_node, bool wait) 2121 { 2122 struct irdma_ah_info ah_info = {}; 2123 struct irdma_device *iwdev = cm_node->iwdev; 2124 2125 ether_addr_copy(ah_info.mac_addr, iwdev->netdev->dev_addr); 2126 2127 ah_info.hop_ttl = 0x40; 2128 ah_info.tc_tos = cm_node->tos; 2129 ah_info.vsi = &iwdev->vsi; 2130 2131 if (cm_node->ipv4) { 2132 ah_info.ipv4_valid = true; 2133 ah_info.dest_ip_addr[0] = cm_node->rem_addr[0]; 2134 ah_info.src_ip_addr[0] = cm_node->loc_addr[0]; 2135 ah_info.do_lpbk = irdma_ipv4_is_lpb(ah_info.src_ip_addr[0], 2136 ah_info.dest_ip_addr[0]); 2137 } else { 2138 memcpy(ah_info.dest_ip_addr, cm_node->rem_addr, 2139 sizeof(ah_info.dest_ip_addr)); 2140 memcpy(ah_info.src_ip_addr, cm_node->loc_addr, 2141 sizeof(ah_info.src_ip_addr)); 2142 ah_info.do_lpbk = irdma_ipv6_is_lpb(ah_info.src_ip_addr, 2143 ah_info.dest_ip_addr); 2144 } 2145 2146 ah_info.vlan_tag = cm_node->vlan_id; 2147 if (cm_node->vlan_id < VLAN_N_VID) { 2148 ah_info.insert_vlan_tag = 1; 2149 ah_info.vlan_tag |= cm_node->user_pri << VLAN_PRIO_SHIFT; 2150 } 2151 2152 ah_info.dst_arpindex = 2153 irdma_arp_table(iwdev->rf, ah_info.dest_ip_addr, 2154 ah_info.ipv4_valid, NULL, IRDMA_ARP_RESOLVE); 2155 2156 if (irdma_puda_create_ah(&iwdev->rf->sc_dev, &ah_info, wait, 2157 IRDMA_PUDA_RSRC_TYPE_ILQ, cm_node, 2158 &cm_node->ah)) 2159 return -ENOMEM; 2160 2161 trace_irdma_create_ah(cm_node); 2162 return 0; 2163 } 2164 2165 /** 2166 * irdma_cm_free_ah - free a cm address handle 2167 * @cm_node: The connection manager node to create AH for 2168 */ 2169 static void irdma_cm_free_ah(struct irdma_cm_node *cm_node) 2170 { 2171 struct irdma_device *iwdev = cm_node->iwdev; 2172 2173 trace_irdma_cm_free_ah(cm_node); 2174 irdma_puda_free_ah(&iwdev->rf->sc_dev, cm_node->ah); 2175 cm_node->ah = NULL; 2176 } 2177 2178 /** 2179 * irdma_make_cm_node - create a new instance of a cm node 2180 * @cm_core: cm's core 2181 * @iwdev: iwarp device structure 2182 * @cm_info: quad info for connection 2183 * @listener: passive connection's listener 2184 */ 2185 static struct irdma_cm_node * 2186 irdma_make_cm_node(struct irdma_cm_core *cm_core, struct irdma_device *iwdev, 2187 struct irdma_cm_info *cm_info, 2188 struct irdma_cm_listener *listener) 2189 { 2190 struct irdma_cm_node *cm_node; 2191 int oldarpindex; 2192 int arpindex; 2193 struct net_device *netdev = iwdev->netdev; 2194 2195 /* create an hte and cm_node for this instance */ 2196 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC); 2197 if (!cm_node) 2198 return NULL; 2199 2200 /* set our node specific transport info */ 2201 cm_node->ipv4 = cm_info->ipv4; 2202 cm_node->vlan_id = cm_info->vlan_id; 2203 if (cm_node->vlan_id >= VLAN_N_VID && iwdev->dcb) 2204 cm_node->vlan_id = 0; 2205 cm_node->tos = cm_info->tos; 2206 cm_node->user_pri = cm_info->user_pri; 2207 if (listener) { 2208 if (listener->tos != cm_info->tos) 2209 ibdev_warn(&iwdev->ibdev, 2210 "application TOS[%d] and remote client TOS[%d] mismatch\n", 2211 listener->tos, cm_info->tos); 2212 cm_node->tos = max(listener->tos, cm_info->tos); 2213 cm_node->user_pri = rt_tos2priority(cm_node->tos); 2214 ibdev_dbg(&iwdev->ibdev, 2215 "DCB: listener: TOS:[%d] UP:[%d]\n", cm_node->tos, 2216 cm_node->user_pri); 2217 trace_irdma_listener_tos(iwdev, cm_node->tos, 2218 cm_node->user_pri); 2219 } 2220 memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr)); 2221 memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr)); 2222 cm_node->loc_port = cm_info->loc_port; 2223 cm_node->rem_port = cm_info->rem_port; 2224 2225 cm_node->mpa_frame_rev = IRDMA_CM_DEFAULT_MPA_VER; 2226 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO; 2227 cm_node->iwdev = iwdev; 2228 cm_node->dev = &iwdev->rf->sc_dev; 2229 2230 cm_node->ird_size = cm_node->dev->hw_attrs.max_hw_ird; 2231 cm_node->ord_size = cm_node->dev->hw_attrs.max_hw_ord; 2232 2233 cm_node->listener = listener; 2234 cm_node->cm_id = cm_info->cm_id; 2235 ether_addr_copy(cm_node->loc_mac, netdev->dev_addr); 2236 spin_lock_init(&cm_node->retrans_list_lock); 2237 cm_node->ack_rcvd = false; 2238 2239 init_completion(&cm_node->establish_comp); 2240 refcount_set(&cm_node->refcnt, 1); 2241 /* associate our parent CM core */ 2242 cm_node->cm_core = cm_core; 2243 cm_node->tcp_cntxt.loc_id = IRDMA_CM_DEFAULT_LOCAL_ID; 2244 cm_node->tcp_cntxt.rcv_wscale = iwdev->rcv_wscale; 2245 cm_node->tcp_cntxt.rcv_wnd = iwdev->rcv_wnd >> cm_node->tcp_cntxt.rcv_wscale; 2246 if (cm_node->ipv4) { 2247 cm_node->tcp_cntxt.loc_seq_num = secure_tcp_seq(htonl(cm_node->loc_addr[0]), 2248 htonl(cm_node->rem_addr[0]), 2249 htons(cm_node->loc_port), 2250 htons(cm_node->rem_port)); 2251 cm_node->tcp_cntxt.mss = iwdev->vsi.mtu - IRDMA_MTU_TO_MSS_IPV4; 2252 } else if (IS_ENABLED(CONFIG_IPV6)) { 2253 __be32 loc[4] = { 2254 htonl(cm_node->loc_addr[0]), htonl(cm_node->loc_addr[1]), 2255 htonl(cm_node->loc_addr[2]), htonl(cm_node->loc_addr[3]) 2256 }; 2257 __be32 rem[4] = { 2258 htonl(cm_node->rem_addr[0]), htonl(cm_node->rem_addr[1]), 2259 htonl(cm_node->rem_addr[2]), htonl(cm_node->rem_addr[3]) 2260 }; 2261 cm_node->tcp_cntxt.loc_seq_num = secure_tcpv6_seq(loc, rem, 2262 htons(cm_node->loc_port), 2263 htons(cm_node->rem_port)); 2264 cm_node->tcp_cntxt.mss = iwdev->vsi.mtu - IRDMA_MTU_TO_MSS_IPV6; 2265 } 2266 2267 if ((cm_node->ipv4 && 2268 irdma_ipv4_is_lpb(cm_node->loc_addr[0], cm_node->rem_addr[0])) || 2269 (!cm_node->ipv4 && 2270 irdma_ipv6_is_lpb(cm_node->loc_addr, cm_node->rem_addr))) { 2271 cm_node->do_lpb = true; 2272 arpindex = irdma_arp_table(iwdev->rf, cm_node->rem_addr, 2273 cm_node->ipv4, NULL, 2274 IRDMA_ARP_RESOLVE); 2275 } else { 2276 oldarpindex = irdma_arp_table(iwdev->rf, cm_node->rem_addr, 2277 cm_node->ipv4, NULL, 2278 IRDMA_ARP_RESOLVE); 2279 if (cm_node->ipv4) 2280 arpindex = irdma_addr_resolve_neigh(iwdev, 2281 cm_info->loc_addr[0], 2282 cm_info->rem_addr[0], 2283 oldarpindex); 2284 else if (IS_ENABLED(CONFIG_IPV6)) 2285 arpindex = irdma_addr_resolve_neigh_ipv6(iwdev, 2286 cm_info->loc_addr, 2287 cm_info->rem_addr, 2288 oldarpindex); 2289 else 2290 arpindex = -EINVAL; 2291 } 2292 2293 if (arpindex < 0) 2294 goto err; 2295 2296 ether_addr_copy(cm_node->rem_mac, 2297 iwdev->rf->arp_table[arpindex].mac_addr); 2298 irdma_add_hte_node(cm_core, cm_node); 2299 cm_core->stats_nodes_created++; 2300 return cm_node; 2301 2302 err: 2303 kfree(cm_node); 2304 2305 return NULL; 2306 } 2307 2308 static void irdma_cm_node_free_cb(struct rcu_head *rcu_head) 2309 { 2310 struct irdma_cm_node *cm_node = 2311 container_of(rcu_head, struct irdma_cm_node, rcu_head); 2312 struct irdma_cm_core *cm_core = cm_node->cm_core; 2313 struct irdma_qp *iwqp; 2314 struct irdma_cm_info nfo; 2315 2316 /* if the node is destroyed before connection was accelerated */ 2317 if (!cm_node->accelerated && cm_node->accept_pend) { 2318 ibdev_dbg(&cm_node->iwdev->ibdev, 2319 "CM: node destroyed before established\n"); 2320 atomic_dec(&cm_node->listener->pend_accepts_cnt); 2321 } 2322 if (cm_node->close_entry) 2323 irdma_handle_close_entry(cm_node, 0); 2324 if (cm_node->listener) { 2325 irdma_dec_refcnt_listen(cm_core, cm_node->listener, 0, true); 2326 } else { 2327 if (cm_node->apbvt_set) { 2328 irdma_del_apbvt(cm_node->iwdev, cm_node->apbvt_entry); 2329 cm_node->apbvt_set = 0; 2330 } 2331 irdma_get_addr_info(cm_node, &nfo); 2332 if (cm_node->qhash_set) { 2333 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id; 2334 irdma_manage_qhash(cm_node->iwdev, &nfo, 2335 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 2336 IRDMA_QHASH_MANAGE_TYPE_DELETE, NULL, 2337 false); 2338 cm_node->qhash_set = 0; 2339 } 2340 } 2341 2342 iwqp = cm_node->iwqp; 2343 if (iwqp) { 2344 cm_node->cm_id->rem_ref(cm_node->cm_id); 2345 cm_node->cm_id = NULL; 2346 iwqp->cm_id = NULL; 2347 irdma_qp_rem_ref(&iwqp->ibqp); 2348 cm_node->iwqp = NULL; 2349 } else if (cm_node->qhash_set) { 2350 irdma_get_addr_info(cm_node, &nfo); 2351 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id; 2352 irdma_manage_qhash(cm_node->iwdev, &nfo, 2353 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 2354 IRDMA_QHASH_MANAGE_TYPE_DELETE, NULL, false); 2355 cm_node->qhash_set = 0; 2356 } 2357 2358 cm_core->cm_free_ah(cm_node); 2359 kfree(cm_node); 2360 } 2361 2362 /** 2363 * irdma_rem_ref_cm_node - destroy an instance of a cm node 2364 * @cm_node: connection's node 2365 */ 2366 void irdma_rem_ref_cm_node(struct irdma_cm_node *cm_node) 2367 { 2368 struct irdma_cm_core *cm_core = cm_node->cm_core; 2369 unsigned long flags; 2370 2371 trace_irdma_rem_ref_cm_node(cm_node, 0, __builtin_return_address(0)); 2372 spin_lock_irqsave(&cm_core->ht_lock, flags); 2373 2374 if (!refcount_dec_and_test(&cm_node->refcnt)) { 2375 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 2376 return; 2377 } 2378 if (cm_node->iwqp) { 2379 cm_node->iwqp->cm_node = NULL; 2380 cm_node->iwqp->cm_id = NULL; 2381 } 2382 hash_del_rcu(&cm_node->list); 2383 cm_node->cm_core->stats_nodes_destroyed++; 2384 2385 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 2386 2387 /* wait for all list walkers to exit their grace period */ 2388 call_rcu(&cm_node->rcu_head, irdma_cm_node_free_cb); 2389 } 2390 2391 /** 2392 * irdma_handle_fin_pkt - FIN packet received 2393 * @cm_node: connection's node 2394 */ 2395 static void irdma_handle_fin_pkt(struct irdma_cm_node *cm_node) 2396 { 2397 switch (cm_node->state) { 2398 case IRDMA_CM_STATE_SYN_RCVD: 2399 case IRDMA_CM_STATE_SYN_SENT: 2400 case IRDMA_CM_STATE_ESTABLISHED: 2401 case IRDMA_CM_STATE_MPAREJ_RCVD: 2402 cm_node->tcp_cntxt.rcv_nxt++; 2403 irdma_cleanup_retrans_entry(cm_node); 2404 cm_node->state = IRDMA_CM_STATE_LAST_ACK; 2405 irdma_send_fin(cm_node); 2406 break; 2407 case IRDMA_CM_STATE_MPAREQ_SENT: 2408 irdma_create_event(cm_node, IRDMA_CM_EVENT_ABORTED); 2409 cm_node->tcp_cntxt.rcv_nxt++; 2410 irdma_cleanup_retrans_entry(cm_node); 2411 cm_node->state = IRDMA_CM_STATE_CLOSED; 2412 refcount_inc(&cm_node->refcnt); 2413 irdma_send_reset(cm_node); 2414 break; 2415 case IRDMA_CM_STATE_FIN_WAIT1: 2416 cm_node->tcp_cntxt.rcv_nxt++; 2417 irdma_cleanup_retrans_entry(cm_node); 2418 cm_node->state = IRDMA_CM_STATE_CLOSING; 2419 irdma_send_ack(cm_node); 2420 /* 2421 * Wait for ACK as this is simultaneous close. 2422 * After we receive ACK, do not send anything. 2423 * Just rm the node. 2424 */ 2425 break; 2426 case IRDMA_CM_STATE_FIN_WAIT2: 2427 cm_node->tcp_cntxt.rcv_nxt++; 2428 irdma_cleanup_retrans_entry(cm_node); 2429 cm_node->state = IRDMA_CM_STATE_TIME_WAIT; 2430 irdma_send_ack(cm_node); 2431 irdma_schedule_cm_timer(cm_node, NULL, IRDMA_TIMER_TYPE_CLOSE, 2432 1, 0); 2433 break; 2434 case IRDMA_CM_STATE_TIME_WAIT: 2435 cm_node->tcp_cntxt.rcv_nxt++; 2436 irdma_cleanup_retrans_entry(cm_node); 2437 cm_node->state = IRDMA_CM_STATE_CLOSED; 2438 irdma_rem_ref_cm_node(cm_node); 2439 break; 2440 case IRDMA_CM_STATE_OFFLOADED: 2441 default: 2442 ibdev_dbg(&cm_node->iwdev->ibdev, 2443 "CM: bad state node state = %d\n", cm_node->state); 2444 break; 2445 } 2446 } 2447 2448 /** 2449 * irdma_handle_rst_pkt - process received RST packet 2450 * @cm_node: connection's node 2451 * @rbuf: receive buffer 2452 */ 2453 static void irdma_handle_rst_pkt(struct irdma_cm_node *cm_node, 2454 struct irdma_puda_buf *rbuf) 2455 { 2456 ibdev_dbg(&cm_node->iwdev->ibdev, 2457 "CM: caller: %pS cm_node=%p state=%d rem_port=0x%04x loc_port=0x%04x rem_addr=%pI4 loc_addr=%pI4\n", 2458 __builtin_return_address(0), cm_node, cm_node->state, 2459 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr, 2460 cm_node->loc_addr); 2461 2462 irdma_cleanup_retrans_entry(cm_node); 2463 switch (cm_node->state) { 2464 case IRDMA_CM_STATE_SYN_SENT: 2465 case IRDMA_CM_STATE_MPAREQ_SENT: 2466 switch (cm_node->mpa_frame_rev) { 2467 case IETF_MPA_V2: 2468 /* Drop down to MPA_V1*/ 2469 cm_node->mpa_frame_rev = IETF_MPA_V1; 2470 /* send a syn and goto syn sent state */ 2471 cm_node->state = IRDMA_CM_STATE_SYN_SENT; 2472 if (irdma_send_syn(cm_node, 0)) 2473 irdma_active_open_err(cm_node, false); 2474 break; 2475 case IETF_MPA_V1: 2476 default: 2477 irdma_active_open_err(cm_node, false); 2478 break; 2479 } 2480 break; 2481 case IRDMA_CM_STATE_MPAREQ_RCVD: 2482 atomic_inc(&cm_node->passive_state); 2483 break; 2484 case IRDMA_CM_STATE_ESTABLISHED: 2485 case IRDMA_CM_STATE_SYN_RCVD: 2486 case IRDMA_CM_STATE_LISTENING: 2487 irdma_passive_open_err(cm_node, false); 2488 break; 2489 case IRDMA_CM_STATE_OFFLOADED: 2490 irdma_active_open_err(cm_node, false); 2491 break; 2492 case IRDMA_CM_STATE_CLOSED: 2493 break; 2494 case IRDMA_CM_STATE_FIN_WAIT2: 2495 case IRDMA_CM_STATE_FIN_WAIT1: 2496 case IRDMA_CM_STATE_LAST_ACK: 2497 case IRDMA_CM_STATE_TIME_WAIT: 2498 cm_node->state = IRDMA_CM_STATE_CLOSED; 2499 irdma_rem_ref_cm_node(cm_node); 2500 break; 2501 default: 2502 break; 2503 } 2504 } 2505 2506 /** 2507 * irdma_handle_rcv_mpa - Process a recv'd mpa buffer 2508 * @cm_node: connection's node 2509 * @rbuf: receive buffer 2510 */ 2511 static void irdma_handle_rcv_mpa(struct irdma_cm_node *cm_node, 2512 struct irdma_puda_buf *rbuf) 2513 { 2514 int err; 2515 int datasize = rbuf->datalen; 2516 u8 *dataloc = rbuf->data; 2517 2518 enum irdma_cm_event_type type = IRDMA_CM_EVENT_UNKNOWN; 2519 u32 res_type; 2520 2521 err = irdma_parse_mpa(cm_node, dataloc, &res_type, datasize); 2522 if (err) { 2523 if (cm_node->state == IRDMA_CM_STATE_MPAREQ_SENT) 2524 irdma_active_open_err(cm_node, true); 2525 else 2526 irdma_passive_open_err(cm_node, true); 2527 return; 2528 } 2529 2530 switch (cm_node->state) { 2531 case IRDMA_CM_STATE_ESTABLISHED: 2532 if (res_type == IRDMA_MPA_REQUEST_REJECT) 2533 ibdev_dbg(&cm_node->iwdev->ibdev, 2534 "CM: state for reject\n"); 2535 cm_node->state = IRDMA_CM_STATE_MPAREQ_RCVD; 2536 type = IRDMA_CM_EVENT_MPA_REQ; 2537 irdma_send_ack(cm_node); /* ACK received MPA request */ 2538 atomic_set(&cm_node->passive_state, 2539 IRDMA_PASSIVE_STATE_INDICATED); 2540 break; 2541 case IRDMA_CM_STATE_MPAREQ_SENT: 2542 irdma_cleanup_retrans_entry(cm_node); 2543 if (res_type == IRDMA_MPA_REQUEST_REJECT) { 2544 type = IRDMA_CM_EVENT_MPA_REJECT; 2545 cm_node->state = IRDMA_CM_STATE_MPAREJ_RCVD; 2546 } else { 2547 type = IRDMA_CM_EVENT_CONNECTED; 2548 cm_node->state = IRDMA_CM_STATE_OFFLOADED; 2549 } 2550 irdma_send_ack(cm_node); 2551 break; 2552 default: 2553 ibdev_dbg(&cm_node->iwdev->ibdev, 2554 "CM: wrong cm_node state =%d\n", cm_node->state); 2555 break; 2556 } 2557 irdma_create_event(cm_node, type); 2558 } 2559 2560 /** 2561 * irdma_check_syn - Check for error on received syn ack 2562 * @cm_node: connection's node 2563 * @tcph: pointer tcp header 2564 */ 2565 static int irdma_check_syn(struct irdma_cm_node *cm_node, struct tcphdr *tcph) 2566 { 2567 if (ntohl(tcph->ack_seq) != cm_node->tcp_cntxt.loc_seq_num) { 2568 irdma_active_open_err(cm_node, true); 2569 return 1; 2570 } 2571 2572 return 0; 2573 } 2574 2575 /** 2576 * irdma_check_seq - check seq numbers if OK 2577 * @cm_node: connection's node 2578 * @tcph: pointer tcp header 2579 */ 2580 static int irdma_check_seq(struct irdma_cm_node *cm_node, struct tcphdr *tcph) 2581 { 2582 u32 seq; 2583 u32 ack_seq; 2584 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num; 2585 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt; 2586 u32 rcv_wnd; 2587 int err = 0; 2588 2589 seq = ntohl(tcph->seq); 2590 ack_seq = ntohl(tcph->ack_seq); 2591 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd; 2592 if (ack_seq != loc_seq_num || 2593 !between(seq, rcv_nxt, (rcv_nxt + rcv_wnd))) 2594 err = -1; 2595 if (err) 2596 ibdev_dbg(&cm_node->iwdev->ibdev, 2597 "CM: seq number err\n"); 2598 2599 return err; 2600 } 2601 2602 void irdma_add_conn_est_qh(struct irdma_cm_node *cm_node) 2603 { 2604 struct irdma_cm_info nfo; 2605 2606 irdma_get_addr_info(cm_node, &nfo); 2607 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id; 2608 irdma_manage_qhash(cm_node->iwdev, &nfo, 2609 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 2610 IRDMA_QHASH_MANAGE_TYPE_ADD, 2611 cm_node, false); 2612 cm_node->qhash_set = true; 2613 } 2614 2615 /** 2616 * irdma_handle_syn_pkt - is for Passive node 2617 * @cm_node: connection's node 2618 * @rbuf: receive buffer 2619 */ 2620 static void irdma_handle_syn_pkt(struct irdma_cm_node *cm_node, 2621 struct irdma_puda_buf *rbuf) 2622 { 2623 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2624 int err; 2625 u32 inc_sequence; 2626 int optionsize; 2627 2628 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); 2629 inc_sequence = ntohl(tcph->seq); 2630 2631 switch (cm_node->state) { 2632 case IRDMA_CM_STATE_SYN_SENT: 2633 case IRDMA_CM_STATE_MPAREQ_SENT: 2634 /* Rcvd syn on active open connection */ 2635 irdma_active_open_err(cm_node, 1); 2636 break; 2637 case IRDMA_CM_STATE_LISTENING: 2638 /* Passive OPEN */ 2639 if (atomic_read(&cm_node->listener->pend_accepts_cnt) > 2640 cm_node->listener->backlog) { 2641 cm_node->cm_core->stats_backlog_drops++; 2642 irdma_passive_open_err(cm_node, false); 2643 break; 2644 } 2645 err = irdma_handle_tcp_options(cm_node, tcph, optionsize, 1); 2646 if (err) { 2647 irdma_passive_open_err(cm_node, false); 2648 /* drop pkt */ 2649 break; 2650 } 2651 err = cm_node->cm_core->cm_create_ah(cm_node, false); 2652 if (err) { 2653 irdma_passive_open_err(cm_node, false); 2654 /* drop pkt */ 2655 break; 2656 } 2657 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; 2658 cm_node->accept_pend = 1; 2659 atomic_inc(&cm_node->listener->pend_accepts_cnt); 2660 2661 cm_node->state = IRDMA_CM_STATE_SYN_RCVD; 2662 break; 2663 case IRDMA_CM_STATE_CLOSED: 2664 irdma_cleanup_retrans_entry(cm_node); 2665 refcount_inc(&cm_node->refcnt); 2666 irdma_send_reset(cm_node); 2667 break; 2668 case IRDMA_CM_STATE_OFFLOADED: 2669 case IRDMA_CM_STATE_ESTABLISHED: 2670 case IRDMA_CM_STATE_FIN_WAIT1: 2671 case IRDMA_CM_STATE_FIN_WAIT2: 2672 case IRDMA_CM_STATE_MPAREQ_RCVD: 2673 case IRDMA_CM_STATE_LAST_ACK: 2674 case IRDMA_CM_STATE_CLOSING: 2675 case IRDMA_CM_STATE_UNKNOWN: 2676 default: 2677 break; 2678 } 2679 } 2680 2681 /** 2682 * irdma_handle_synack_pkt - Process SYN+ACK packet (active side) 2683 * @cm_node: connection's node 2684 * @rbuf: receive buffer 2685 */ 2686 static void irdma_handle_synack_pkt(struct irdma_cm_node *cm_node, 2687 struct irdma_puda_buf *rbuf) 2688 { 2689 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2690 int err; 2691 u32 inc_sequence; 2692 int optionsize; 2693 2694 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); 2695 inc_sequence = ntohl(tcph->seq); 2696 switch (cm_node->state) { 2697 case IRDMA_CM_STATE_SYN_SENT: 2698 irdma_cleanup_retrans_entry(cm_node); 2699 /* active open */ 2700 if (irdma_check_syn(cm_node, tcph)) { 2701 ibdev_dbg(&cm_node->iwdev->ibdev, 2702 "CM: check syn fail\n"); 2703 return; 2704 } 2705 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); 2706 /* setup options */ 2707 err = irdma_handle_tcp_options(cm_node, tcph, optionsize, 0); 2708 if (err) { 2709 ibdev_dbg(&cm_node->iwdev->ibdev, 2710 "CM: cm_node=%p tcp_options failed\n", 2711 cm_node); 2712 break; 2713 } 2714 irdma_cleanup_retrans_entry(cm_node); 2715 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; 2716 irdma_send_ack(cm_node); /* ACK for the syn_ack */ 2717 err = irdma_send_mpa_request(cm_node); 2718 if (err) { 2719 ibdev_dbg(&cm_node->iwdev->ibdev, 2720 "CM: cm_node=%p irdma_send_mpa_request failed\n", 2721 cm_node); 2722 break; 2723 } 2724 cm_node->state = IRDMA_CM_STATE_MPAREQ_SENT; 2725 break; 2726 case IRDMA_CM_STATE_MPAREQ_RCVD: 2727 irdma_passive_open_err(cm_node, true); 2728 break; 2729 case IRDMA_CM_STATE_LISTENING: 2730 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq); 2731 irdma_cleanup_retrans_entry(cm_node); 2732 cm_node->state = IRDMA_CM_STATE_CLOSED; 2733 irdma_send_reset(cm_node); 2734 break; 2735 case IRDMA_CM_STATE_CLOSED: 2736 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq); 2737 irdma_cleanup_retrans_entry(cm_node); 2738 refcount_inc(&cm_node->refcnt); 2739 irdma_send_reset(cm_node); 2740 break; 2741 case IRDMA_CM_STATE_ESTABLISHED: 2742 case IRDMA_CM_STATE_FIN_WAIT1: 2743 case IRDMA_CM_STATE_FIN_WAIT2: 2744 case IRDMA_CM_STATE_LAST_ACK: 2745 case IRDMA_CM_STATE_OFFLOADED: 2746 case IRDMA_CM_STATE_CLOSING: 2747 case IRDMA_CM_STATE_UNKNOWN: 2748 case IRDMA_CM_STATE_MPAREQ_SENT: 2749 default: 2750 break; 2751 } 2752 } 2753 2754 /** 2755 * irdma_handle_ack_pkt - process packet with ACK 2756 * @cm_node: connection's node 2757 * @rbuf: receive buffer 2758 */ 2759 static int irdma_handle_ack_pkt(struct irdma_cm_node *cm_node, 2760 struct irdma_puda_buf *rbuf) 2761 { 2762 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2763 u32 inc_sequence; 2764 int ret; 2765 int optionsize; 2766 u32 datasize = rbuf->datalen; 2767 2768 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); 2769 2770 if (irdma_check_seq(cm_node, tcph)) 2771 return -EINVAL; 2772 2773 inc_sequence = ntohl(tcph->seq); 2774 switch (cm_node->state) { 2775 case IRDMA_CM_STATE_SYN_RCVD: 2776 irdma_cleanup_retrans_entry(cm_node); 2777 ret = irdma_handle_tcp_options(cm_node, tcph, optionsize, 1); 2778 if (ret) 2779 return ret; 2780 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); 2781 cm_node->state = IRDMA_CM_STATE_ESTABLISHED; 2782 if (datasize) { 2783 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; 2784 irdma_handle_rcv_mpa(cm_node, rbuf); 2785 } 2786 break; 2787 case IRDMA_CM_STATE_ESTABLISHED: 2788 irdma_cleanup_retrans_entry(cm_node); 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_MPAREQ_SENT: 2795 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); 2796 if (datasize) { 2797 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; 2798 cm_node->ack_rcvd = false; 2799 irdma_handle_rcv_mpa(cm_node, rbuf); 2800 } else { 2801 cm_node->ack_rcvd = true; 2802 } 2803 break; 2804 case IRDMA_CM_STATE_LISTENING: 2805 irdma_cleanup_retrans_entry(cm_node); 2806 cm_node->state = IRDMA_CM_STATE_CLOSED; 2807 irdma_send_reset(cm_node); 2808 break; 2809 case IRDMA_CM_STATE_CLOSED: 2810 irdma_cleanup_retrans_entry(cm_node); 2811 refcount_inc(&cm_node->refcnt); 2812 irdma_send_reset(cm_node); 2813 break; 2814 case IRDMA_CM_STATE_LAST_ACK: 2815 case IRDMA_CM_STATE_CLOSING: 2816 irdma_cleanup_retrans_entry(cm_node); 2817 cm_node->state = IRDMA_CM_STATE_CLOSED; 2818 irdma_rem_ref_cm_node(cm_node); 2819 break; 2820 case IRDMA_CM_STATE_FIN_WAIT1: 2821 irdma_cleanup_retrans_entry(cm_node); 2822 cm_node->state = IRDMA_CM_STATE_FIN_WAIT2; 2823 break; 2824 case IRDMA_CM_STATE_SYN_SENT: 2825 case IRDMA_CM_STATE_FIN_WAIT2: 2826 case IRDMA_CM_STATE_OFFLOADED: 2827 case IRDMA_CM_STATE_MPAREQ_RCVD: 2828 case IRDMA_CM_STATE_UNKNOWN: 2829 default: 2830 irdma_cleanup_retrans_entry(cm_node); 2831 break; 2832 } 2833 2834 return 0; 2835 } 2836 2837 /** 2838 * irdma_process_pkt - process cm packet 2839 * @cm_node: connection's node 2840 * @rbuf: receive buffer 2841 */ 2842 static void irdma_process_pkt(struct irdma_cm_node *cm_node, 2843 struct irdma_puda_buf *rbuf) 2844 { 2845 enum irdma_tcpip_pkt_type pkt_type = IRDMA_PKT_TYPE_UNKNOWN; 2846 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2847 u32 fin_set = 0; 2848 int err; 2849 2850 if (tcph->rst) { 2851 pkt_type = IRDMA_PKT_TYPE_RST; 2852 } else if (tcph->syn) { 2853 pkt_type = IRDMA_PKT_TYPE_SYN; 2854 if (tcph->ack) 2855 pkt_type = IRDMA_PKT_TYPE_SYNACK; 2856 } else if (tcph->ack) { 2857 pkt_type = IRDMA_PKT_TYPE_ACK; 2858 } 2859 if (tcph->fin) 2860 fin_set = 1; 2861 2862 switch (pkt_type) { 2863 case IRDMA_PKT_TYPE_SYN: 2864 irdma_handle_syn_pkt(cm_node, rbuf); 2865 break; 2866 case IRDMA_PKT_TYPE_SYNACK: 2867 irdma_handle_synack_pkt(cm_node, rbuf); 2868 break; 2869 case IRDMA_PKT_TYPE_ACK: 2870 err = irdma_handle_ack_pkt(cm_node, rbuf); 2871 if (fin_set && !err) 2872 irdma_handle_fin_pkt(cm_node); 2873 break; 2874 case IRDMA_PKT_TYPE_RST: 2875 irdma_handle_rst_pkt(cm_node, rbuf); 2876 break; 2877 default: 2878 if (fin_set && 2879 (!irdma_check_seq(cm_node, (struct tcphdr *)rbuf->tcph))) 2880 irdma_handle_fin_pkt(cm_node); 2881 break; 2882 } 2883 } 2884 2885 /** 2886 * irdma_make_listen_node - create a listen node with params 2887 * @cm_core: cm's core 2888 * @iwdev: iwarp device structure 2889 * @cm_info: quad info for connection 2890 */ 2891 static struct irdma_cm_listener * 2892 irdma_make_listen_node(struct irdma_cm_core *cm_core, 2893 struct irdma_device *iwdev, 2894 struct irdma_cm_info *cm_info) 2895 { 2896 struct irdma_cm_listener *listener; 2897 unsigned long flags; 2898 2899 /* cannot have multiple matching listeners */ 2900 listener = irdma_find_listener(cm_core, cm_info->loc_addr, 2901 cm_info->loc_port, cm_info->vlan_id, 2902 IRDMA_CM_LISTENER_EITHER_STATE); 2903 if (listener && 2904 listener->listener_state == IRDMA_CM_LISTENER_ACTIVE_STATE) { 2905 refcount_dec(&listener->refcnt); 2906 return NULL; 2907 } 2908 2909 if (!listener) { 2910 /* create a CM listen node 2911 * 1/2 node to compare incoming traffic to 2912 */ 2913 listener = kzalloc(sizeof(*listener), GFP_KERNEL); 2914 if (!listener) 2915 return NULL; 2916 cm_core->stats_listen_nodes_created++; 2917 memcpy(listener->loc_addr, cm_info->loc_addr, 2918 sizeof(listener->loc_addr)); 2919 listener->loc_port = cm_info->loc_port; 2920 2921 INIT_LIST_HEAD(&listener->child_listen_list); 2922 2923 refcount_set(&listener->refcnt, 1); 2924 } else { 2925 listener->reused_node = 1; 2926 } 2927 2928 listener->cm_id = cm_info->cm_id; 2929 listener->ipv4 = cm_info->ipv4; 2930 listener->vlan_id = cm_info->vlan_id; 2931 atomic_set(&listener->pend_accepts_cnt, 0); 2932 listener->cm_core = cm_core; 2933 listener->iwdev = iwdev; 2934 2935 listener->backlog = cm_info->backlog; 2936 listener->listener_state = IRDMA_CM_LISTENER_ACTIVE_STATE; 2937 2938 if (!listener->reused_node) { 2939 spin_lock_irqsave(&cm_core->listen_list_lock, flags); 2940 list_add(&listener->list, &cm_core->listen_list); 2941 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); 2942 } 2943 2944 return listener; 2945 } 2946 2947 /** 2948 * irdma_create_cm_node - make a connection node with params 2949 * @cm_core: cm's core 2950 * @iwdev: iwarp device structure 2951 * @conn_param: connection parameters 2952 * @cm_info: quad info for connection 2953 * @caller_cm_node: pointer to cm_node structure to return 2954 */ 2955 static int irdma_create_cm_node(struct irdma_cm_core *cm_core, 2956 struct irdma_device *iwdev, 2957 struct iw_cm_conn_param *conn_param, 2958 struct irdma_cm_info *cm_info, 2959 struct irdma_cm_node **caller_cm_node) 2960 { 2961 struct irdma_cm_node *cm_node; 2962 u16 private_data_len = conn_param->private_data_len; 2963 const void *private_data = conn_param->private_data; 2964 2965 /* create a CM connection node */ 2966 cm_node = irdma_make_cm_node(cm_core, iwdev, cm_info, NULL); 2967 if (!cm_node) 2968 return -ENOMEM; 2969 2970 /* set our node side to client (active) side */ 2971 cm_node->tcp_cntxt.client = 1; 2972 cm_node->tcp_cntxt.rcv_wscale = IRDMA_CM_DEFAULT_RCV_WND_SCALE; 2973 2974 irdma_record_ird_ord(cm_node, conn_param->ird, conn_param->ord); 2975 2976 cm_node->pdata.size = private_data_len; 2977 cm_node->pdata.addr = cm_node->pdata_buf; 2978 2979 memcpy(cm_node->pdata_buf, private_data, private_data_len); 2980 *caller_cm_node = cm_node; 2981 2982 return 0; 2983 } 2984 2985 /** 2986 * irdma_cm_reject - reject and teardown a connection 2987 * @cm_node: connection's node 2988 * @pdata: ptr to private data for reject 2989 * @plen: size of private data 2990 */ 2991 static int irdma_cm_reject(struct irdma_cm_node *cm_node, const void *pdata, 2992 u8 plen) 2993 { 2994 int ret; 2995 int passive_state; 2996 2997 if (cm_node->tcp_cntxt.client) 2998 return 0; 2999 3000 irdma_cleanup_retrans_entry(cm_node); 3001 3002 passive_state = atomic_add_return(1, &cm_node->passive_state); 3003 if (passive_state == IRDMA_SEND_RESET_EVENT) { 3004 cm_node->state = IRDMA_CM_STATE_CLOSED; 3005 irdma_rem_ref_cm_node(cm_node); 3006 return 0; 3007 } 3008 3009 if (cm_node->state == IRDMA_CM_STATE_LISTENER_DESTROYED) { 3010 irdma_rem_ref_cm_node(cm_node); 3011 return 0; 3012 } 3013 3014 ret = irdma_send_mpa_reject(cm_node, pdata, plen); 3015 if (!ret) 3016 return 0; 3017 3018 cm_node->state = IRDMA_CM_STATE_CLOSED; 3019 if (irdma_send_reset(cm_node)) 3020 ibdev_dbg(&cm_node->iwdev->ibdev, 3021 "CM: send reset failed\n"); 3022 3023 return ret; 3024 } 3025 3026 /** 3027 * irdma_cm_close - close of cm connection 3028 * @cm_node: connection's node 3029 */ 3030 static int irdma_cm_close(struct irdma_cm_node *cm_node) 3031 { 3032 switch (cm_node->state) { 3033 case IRDMA_CM_STATE_SYN_RCVD: 3034 case IRDMA_CM_STATE_SYN_SENT: 3035 case IRDMA_CM_STATE_ONE_SIDE_ESTABLISHED: 3036 case IRDMA_CM_STATE_ESTABLISHED: 3037 case IRDMA_CM_STATE_ACCEPTING: 3038 case IRDMA_CM_STATE_MPAREQ_SENT: 3039 case IRDMA_CM_STATE_MPAREQ_RCVD: 3040 irdma_cleanup_retrans_entry(cm_node); 3041 irdma_send_reset(cm_node); 3042 break; 3043 case IRDMA_CM_STATE_CLOSE_WAIT: 3044 cm_node->state = IRDMA_CM_STATE_LAST_ACK; 3045 irdma_send_fin(cm_node); 3046 break; 3047 case IRDMA_CM_STATE_FIN_WAIT1: 3048 case IRDMA_CM_STATE_FIN_WAIT2: 3049 case IRDMA_CM_STATE_LAST_ACK: 3050 case IRDMA_CM_STATE_TIME_WAIT: 3051 case IRDMA_CM_STATE_CLOSING: 3052 return -EINVAL; 3053 case IRDMA_CM_STATE_LISTENING: 3054 irdma_cleanup_retrans_entry(cm_node); 3055 irdma_send_reset(cm_node); 3056 break; 3057 case IRDMA_CM_STATE_MPAREJ_RCVD: 3058 case IRDMA_CM_STATE_UNKNOWN: 3059 case IRDMA_CM_STATE_INITED: 3060 case IRDMA_CM_STATE_CLOSED: 3061 case IRDMA_CM_STATE_LISTENER_DESTROYED: 3062 irdma_rem_ref_cm_node(cm_node); 3063 break; 3064 case IRDMA_CM_STATE_OFFLOADED: 3065 if (cm_node->send_entry) 3066 ibdev_dbg(&cm_node->iwdev->ibdev, 3067 "CM: CM send_entry in OFFLOADED state\n"); 3068 irdma_rem_ref_cm_node(cm_node); 3069 break; 3070 } 3071 3072 return 0; 3073 } 3074 3075 /** 3076 * irdma_receive_ilq - recv an ETHERNET packet, and process it 3077 * through CM 3078 * @vsi: VSI structure of dev 3079 * @rbuf: receive buffer 3080 */ 3081 void irdma_receive_ilq(struct irdma_sc_vsi *vsi, struct irdma_puda_buf *rbuf) 3082 { 3083 struct irdma_cm_node *cm_node; 3084 struct irdma_cm_listener *listener; 3085 struct iphdr *iph; 3086 struct ipv6hdr *ip6h; 3087 struct tcphdr *tcph; 3088 struct irdma_cm_info cm_info = {}; 3089 struct irdma_device *iwdev = vsi->back_vsi; 3090 struct irdma_cm_core *cm_core = &iwdev->cm_core; 3091 struct vlan_ethhdr *ethh; 3092 u16 vtag; 3093 3094 /* if vlan, then maclen = 18 else 14 */ 3095 iph = (struct iphdr *)rbuf->iph; 3096 print_hex_dump_debug("ILQ: RECEIVE ILQ BUFFER", DUMP_PREFIX_OFFSET, 3097 16, 8, rbuf->mem.va, rbuf->totallen, false); 3098 if (iwdev->rf->sc_dev.hw_attrs.uk_attrs.hw_rev >= IRDMA_GEN_2) { 3099 if (rbuf->vlan_valid) { 3100 vtag = rbuf->vlan_id; 3101 cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >> 3102 VLAN_PRIO_SHIFT; 3103 cm_info.vlan_id = vtag & VLAN_VID_MASK; 3104 } else { 3105 cm_info.vlan_id = 0xFFFF; 3106 } 3107 } else { 3108 ethh = rbuf->mem.va; 3109 3110 if (ethh->h_vlan_proto == htons(ETH_P_8021Q)) { 3111 vtag = ntohs(ethh->h_vlan_TCI); 3112 cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >> 3113 VLAN_PRIO_SHIFT; 3114 cm_info.vlan_id = vtag & VLAN_VID_MASK; 3115 ibdev_dbg(&cm_core->iwdev->ibdev, 3116 "CM: vlan_id=%d\n", cm_info.vlan_id); 3117 } else { 3118 cm_info.vlan_id = 0xFFFF; 3119 } 3120 } 3121 tcph = (struct tcphdr *)rbuf->tcph; 3122 3123 if (rbuf->ipv4) { 3124 cm_info.loc_addr[0] = ntohl(iph->daddr); 3125 cm_info.rem_addr[0] = ntohl(iph->saddr); 3126 cm_info.ipv4 = true; 3127 cm_info.tos = iph->tos; 3128 } else { 3129 ip6h = (struct ipv6hdr *)rbuf->iph; 3130 irdma_copy_ip_ntohl(cm_info.loc_addr, 3131 ip6h->daddr.in6_u.u6_addr32); 3132 irdma_copy_ip_ntohl(cm_info.rem_addr, 3133 ip6h->saddr.in6_u.u6_addr32); 3134 cm_info.ipv4 = false; 3135 cm_info.tos = (ip6h->priority << 4) | (ip6h->flow_lbl[0] >> 4); 3136 } 3137 cm_info.loc_port = ntohs(tcph->dest); 3138 cm_info.rem_port = ntohs(tcph->source); 3139 cm_node = irdma_find_node(cm_core, cm_info.rem_port, cm_info.rem_addr, 3140 cm_info.loc_port, cm_info.loc_addr, cm_info.vlan_id); 3141 3142 if (!cm_node) { 3143 /* Only type of packet accepted are for the 3144 * PASSIVE open (syn only) 3145 */ 3146 if (!tcph->syn || tcph->ack) 3147 return; 3148 3149 listener = irdma_find_listener(cm_core, 3150 cm_info.loc_addr, 3151 cm_info.loc_port, 3152 cm_info.vlan_id, 3153 IRDMA_CM_LISTENER_ACTIVE_STATE); 3154 if (!listener) { 3155 cm_info.cm_id = NULL; 3156 ibdev_dbg(&cm_core->iwdev->ibdev, 3157 "CM: no listener found\n"); 3158 return; 3159 } 3160 3161 cm_info.cm_id = listener->cm_id; 3162 cm_node = irdma_make_cm_node(cm_core, iwdev, &cm_info, 3163 listener); 3164 if (!cm_node) { 3165 ibdev_dbg(&cm_core->iwdev->ibdev, 3166 "CM: allocate node failed\n"); 3167 refcount_dec(&listener->refcnt); 3168 return; 3169 } 3170 3171 if (!tcph->rst && !tcph->fin) { 3172 cm_node->state = IRDMA_CM_STATE_LISTENING; 3173 } else { 3174 irdma_rem_ref_cm_node(cm_node); 3175 return; 3176 } 3177 3178 refcount_inc(&cm_node->refcnt); 3179 } else if (cm_node->state == IRDMA_CM_STATE_OFFLOADED) { 3180 irdma_rem_ref_cm_node(cm_node); 3181 return; 3182 } 3183 3184 irdma_process_pkt(cm_node, rbuf); 3185 irdma_rem_ref_cm_node(cm_node); 3186 } 3187 3188 static int irdma_add_qh(struct irdma_cm_node *cm_node, bool active) 3189 { 3190 if (!active) 3191 irdma_add_conn_est_qh(cm_node); 3192 return 0; 3193 } 3194 3195 static void irdma_cm_free_ah_nop(struct irdma_cm_node *cm_node) 3196 { 3197 } 3198 3199 /** 3200 * irdma_setup_cm_core - setup top level instance of a cm core 3201 * @iwdev: iwarp device structure 3202 * @rdma_ver: HW version 3203 */ 3204 enum irdma_status_code irdma_setup_cm_core(struct irdma_device *iwdev, 3205 u8 rdma_ver) 3206 { 3207 struct irdma_cm_core *cm_core = &iwdev->cm_core; 3208 3209 cm_core->iwdev = iwdev; 3210 cm_core->dev = &iwdev->rf->sc_dev; 3211 3212 /* Handles CM event work items send to Iwarp core */ 3213 cm_core->event_wq = alloc_ordered_workqueue("iwarp-event-wq", 0); 3214 if (!cm_core->event_wq) 3215 return IRDMA_ERR_NO_MEMORY; 3216 3217 INIT_LIST_HEAD(&cm_core->listen_list); 3218 3219 timer_setup(&cm_core->tcp_timer, irdma_cm_timer_tick, 0); 3220 3221 spin_lock_init(&cm_core->ht_lock); 3222 spin_lock_init(&cm_core->listen_list_lock); 3223 spin_lock_init(&cm_core->apbvt_lock); 3224 switch (rdma_ver) { 3225 case IRDMA_GEN_1: 3226 cm_core->form_cm_frame = irdma_form_uda_cm_frame; 3227 cm_core->cm_create_ah = irdma_add_qh; 3228 cm_core->cm_free_ah = irdma_cm_free_ah_nop; 3229 break; 3230 case IRDMA_GEN_2: 3231 default: 3232 cm_core->form_cm_frame = irdma_form_ah_cm_frame; 3233 cm_core->cm_create_ah = irdma_cm_create_ah; 3234 cm_core->cm_free_ah = irdma_cm_free_ah; 3235 } 3236 3237 return 0; 3238 } 3239 3240 /** 3241 * irdma_cleanup_cm_core - deallocate a top level instance of a 3242 * cm core 3243 * @cm_core: cm's core 3244 */ 3245 void irdma_cleanup_cm_core(struct irdma_cm_core *cm_core) 3246 { 3247 unsigned long flags; 3248 3249 if (!cm_core) 3250 return; 3251 3252 spin_lock_irqsave(&cm_core->ht_lock, flags); 3253 if (timer_pending(&cm_core->tcp_timer)) 3254 del_timer_sync(&cm_core->tcp_timer); 3255 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 3256 3257 destroy_workqueue(cm_core->event_wq); 3258 cm_core->dev->ws_reset(&cm_core->iwdev->vsi); 3259 } 3260 3261 /** 3262 * irdma_init_tcp_ctx - setup qp context 3263 * @cm_node: connection's node 3264 * @tcp_info: offload info for tcp 3265 * @iwqp: associate qp for the connection 3266 */ 3267 static void irdma_init_tcp_ctx(struct irdma_cm_node *cm_node, 3268 struct irdma_tcp_offload_info *tcp_info, 3269 struct irdma_qp *iwqp) 3270 { 3271 tcp_info->ipv4 = cm_node->ipv4; 3272 tcp_info->drop_ooo_seg = !iwqp->iwdev->iw_ooo; 3273 tcp_info->wscale = true; 3274 tcp_info->ignore_tcp_opt = true; 3275 tcp_info->ignore_tcp_uns_opt = true; 3276 tcp_info->no_nagle = false; 3277 3278 tcp_info->ttl = IRDMA_DEFAULT_TTL; 3279 tcp_info->rtt_var = IRDMA_DEFAULT_RTT_VAR; 3280 tcp_info->ss_thresh = IRDMA_DEFAULT_SS_THRESH; 3281 tcp_info->rexmit_thresh = IRDMA_DEFAULT_REXMIT_THRESH; 3282 3283 tcp_info->tcp_state = IRDMA_TCP_STATE_ESTABLISHED; 3284 tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale; 3285 tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale; 3286 3287 tcp_info->snd_nxt = cm_node->tcp_cntxt.loc_seq_num; 3288 tcp_info->snd_wnd = cm_node->tcp_cntxt.snd_wnd; 3289 tcp_info->rcv_nxt = cm_node->tcp_cntxt.rcv_nxt; 3290 tcp_info->snd_max = cm_node->tcp_cntxt.loc_seq_num; 3291 3292 tcp_info->snd_una = cm_node->tcp_cntxt.loc_seq_num; 3293 tcp_info->cwnd = 2 * cm_node->tcp_cntxt.mss; 3294 tcp_info->snd_wl1 = cm_node->tcp_cntxt.rcv_nxt; 3295 tcp_info->snd_wl2 = cm_node->tcp_cntxt.loc_seq_num; 3296 tcp_info->max_snd_window = cm_node->tcp_cntxt.max_snd_wnd; 3297 tcp_info->rcv_wnd = cm_node->tcp_cntxt.rcv_wnd 3298 << cm_node->tcp_cntxt.rcv_wscale; 3299 3300 tcp_info->flow_label = 0; 3301 tcp_info->snd_mss = (u32)cm_node->tcp_cntxt.mss; 3302 tcp_info->tos = cm_node->tos; 3303 if (cm_node->vlan_id < VLAN_N_VID) { 3304 tcp_info->insert_vlan_tag = true; 3305 tcp_info->vlan_tag = cm_node->vlan_id; 3306 tcp_info->vlan_tag |= cm_node->user_pri << VLAN_PRIO_SHIFT; 3307 } 3308 if (cm_node->ipv4) { 3309 tcp_info->src_port = cm_node->loc_port; 3310 tcp_info->dst_port = cm_node->rem_port; 3311 3312 tcp_info->dest_ip_addr[3] = cm_node->rem_addr[0]; 3313 tcp_info->local_ipaddr[3] = cm_node->loc_addr[0]; 3314 tcp_info->arp_idx = (u16)irdma_arp_table(iwqp->iwdev->rf, 3315 &tcp_info->dest_ip_addr[3], 3316 true, NULL, 3317 IRDMA_ARP_RESOLVE); 3318 } else { 3319 tcp_info->src_port = cm_node->loc_port; 3320 tcp_info->dst_port = cm_node->rem_port; 3321 memcpy(tcp_info->dest_ip_addr, cm_node->rem_addr, 3322 sizeof(tcp_info->dest_ip_addr)); 3323 memcpy(tcp_info->local_ipaddr, cm_node->loc_addr, 3324 sizeof(tcp_info->local_ipaddr)); 3325 3326 tcp_info->arp_idx = (u16)irdma_arp_table(iwqp->iwdev->rf, 3327 &tcp_info->dest_ip_addr[0], 3328 false, NULL, 3329 IRDMA_ARP_RESOLVE); 3330 } 3331 } 3332 3333 /** 3334 * irdma_cm_init_tsa_conn - setup qp for RTS 3335 * @iwqp: associate qp for the connection 3336 * @cm_node: connection's node 3337 */ 3338 static void irdma_cm_init_tsa_conn(struct irdma_qp *iwqp, 3339 struct irdma_cm_node *cm_node) 3340 { 3341 struct irdma_iwarp_offload_info *iwarp_info; 3342 struct irdma_qp_host_ctx_info *ctx_info; 3343 3344 iwarp_info = &iwqp->iwarp_info; 3345 ctx_info = &iwqp->ctx_info; 3346 3347 ctx_info->tcp_info = &iwqp->tcp_info; 3348 ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id; 3349 ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id; 3350 3351 iwarp_info->ord_size = cm_node->ord_size; 3352 iwarp_info->ird_size = cm_node->ird_size; 3353 iwarp_info->rd_en = true; 3354 iwarp_info->rdmap_ver = 1; 3355 iwarp_info->ddp_ver = 1; 3356 iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id; 3357 3358 ctx_info->tcp_info_valid = true; 3359 ctx_info->iwarp_info_valid = true; 3360 ctx_info->user_pri = cm_node->user_pri; 3361 3362 irdma_init_tcp_ctx(cm_node, &iwqp->tcp_info, iwqp); 3363 if (cm_node->snd_mark_en) { 3364 iwarp_info->snd_mark_en = true; 3365 iwarp_info->snd_mark_offset = (iwqp->tcp_info.snd_nxt & SNDMARKER_SEQNMASK) + 3366 cm_node->lsmm_size; 3367 } 3368 3369 cm_node->state = IRDMA_CM_STATE_OFFLOADED; 3370 iwqp->tcp_info.tcp_state = IRDMA_TCP_STATE_ESTABLISHED; 3371 iwqp->tcp_info.src_mac_addr_idx = iwqp->iwdev->mac_ip_table_idx; 3372 3373 if (cm_node->rcv_mark_en) { 3374 iwarp_info->rcv_mark_en = true; 3375 iwarp_info->align_hdrs = true; 3376 } 3377 3378 irdma_sc_qp_setctx(&iwqp->sc_qp, iwqp->host_ctx.va, ctx_info); 3379 3380 /* once tcp_info is set, no need to do it again */ 3381 ctx_info->tcp_info_valid = false; 3382 ctx_info->iwarp_info_valid = false; 3383 } 3384 3385 /** 3386 * irdma_cm_disconn - when a connection is being closed 3387 * @iwqp: associated qp for the connection 3388 */ 3389 void irdma_cm_disconn(struct irdma_qp *iwqp) 3390 { 3391 struct irdma_device *iwdev = iwqp->iwdev; 3392 struct disconn_work *work; 3393 unsigned long flags; 3394 3395 work = kzalloc(sizeof(*work), GFP_ATOMIC); 3396 if (!work) 3397 return; 3398 3399 spin_lock_irqsave(&iwdev->rf->qptable_lock, flags); 3400 if (!iwdev->rf->qp_table[iwqp->ibqp.qp_num]) { 3401 spin_unlock_irqrestore(&iwdev->rf->qptable_lock, flags); 3402 ibdev_dbg(&iwdev->ibdev, 3403 "CM: qp_id %d is already freed\n", 3404 iwqp->ibqp.qp_num); 3405 kfree(work); 3406 return; 3407 } 3408 irdma_qp_add_ref(&iwqp->ibqp); 3409 spin_unlock_irqrestore(&iwdev->rf->qptable_lock, flags); 3410 3411 work->iwqp = iwqp; 3412 INIT_WORK(&work->work, irdma_disconnect_worker); 3413 queue_work(iwdev->cleanup_wq, &work->work); 3414 } 3415 3416 /** 3417 * irdma_qp_disconnect - free qp and close cm 3418 * @iwqp: associate qp for the connection 3419 */ 3420 static void irdma_qp_disconnect(struct irdma_qp *iwqp) 3421 { 3422 struct irdma_device *iwdev = iwqp->iwdev; 3423 3424 iwqp->active_conn = 0; 3425 /* close the CM node down if it is still active */ 3426 ibdev_dbg(&iwdev->ibdev, "CM: Call close API\n"); 3427 irdma_cm_close(iwqp->cm_node); 3428 } 3429 3430 /** 3431 * irdma_cm_disconn_true - called by worker thread to disconnect qp 3432 * @iwqp: associate qp for the connection 3433 */ 3434 static void irdma_cm_disconn_true(struct irdma_qp *iwqp) 3435 { 3436 struct iw_cm_id *cm_id; 3437 struct irdma_device *iwdev; 3438 struct irdma_sc_qp *qp = &iwqp->sc_qp; 3439 u16 last_ae; 3440 u8 original_hw_tcp_state; 3441 u8 original_ibqp_state; 3442 int disconn_status = 0; 3443 int issue_disconn = 0; 3444 int issue_close = 0; 3445 int issue_flush = 0; 3446 unsigned long flags; 3447 int err; 3448 3449 iwdev = iwqp->iwdev; 3450 spin_lock_irqsave(&iwqp->lock, flags); 3451 if (rdma_protocol_roce(&iwdev->ibdev, 1)) { 3452 struct ib_qp_attr attr; 3453 3454 if (iwqp->flush_issued || iwqp->sc_qp.qp_uk.destroy_pending) { 3455 spin_unlock_irqrestore(&iwqp->lock, flags); 3456 return; 3457 } 3458 3459 spin_unlock_irqrestore(&iwqp->lock, flags); 3460 3461 attr.qp_state = IB_QPS_ERR; 3462 irdma_modify_qp_roce(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); 3463 irdma_ib_qp_event(iwqp, qp->event_type); 3464 return; 3465 } 3466 3467 cm_id = iwqp->cm_id; 3468 /* make sure we havent already closed this connection */ 3469 if (!cm_id) { 3470 spin_unlock_irqrestore(&iwqp->lock, flags); 3471 return; 3472 } 3473 3474 original_hw_tcp_state = iwqp->hw_tcp_state; 3475 original_ibqp_state = iwqp->ibqp_state; 3476 last_ae = iwqp->last_aeq; 3477 3478 if (qp->term_flags) { 3479 issue_disconn = 1; 3480 issue_close = 1; 3481 iwqp->cm_id = NULL; 3482 irdma_terminate_del_timer(qp); 3483 if (!iwqp->flush_issued) { 3484 iwqp->flush_issued = 1; 3485 issue_flush = 1; 3486 } 3487 } else if ((original_hw_tcp_state == IRDMA_TCP_STATE_CLOSE_WAIT) || 3488 ((original_ibqp_state == IB_QPS_RTS) && 3489 (last_ae == IRDMA_AE_LLP_CONNECTION_RESET))) { 3490 issue_disconn = 1; 3491 if (last_ae == IRDMA_AE_LLP_CONNECTION_RESET) 3492 disconn_status = -ECONNRESET; 3493 } 3494 3495 if ((original_hw_tcp_state == IRDMA_TCP_STATE_CLOSED || 3496 original_hw_tcp_state == IRDMA_TCP_STATE_TIME_WAIT || 3497 last_ae == IRDMA_AE_RDMAP_ROE_BAD_LLP_CLOSE || 3498 last_ae == IRDMA_AE_BAD_CLOSE || 3499 last_ae == IRDMA_AE_LLP_CONNECTION_RESET || iwdev->rf->reset)) { 3500 issue_close = 1; 3501 iwqp->cm_id = NULL; 3502 qp->term_flags = 0; 3503 if (!iwqp->flush_issued) { 3504 iwqp->flush_issued = 1; 3505 issue_flush = 1; 3506 } 3507 } 3508 3509 spin_unlock_irqrestore(&iwqp->lock, flags); 3510 if (issue_flush && !iwqp->sc_qp.qp_uk.destroy_pending) { 3511 irdma_flush_wqes(iwqp, IRDMA_FLUSH_SQ | IRDMA_FLUSH_RQ | 3512 IRDMA_FLUSH_WAIT); 3513 3514 if (qp->term_flags) 3515 irdma_ib_qp_event(iwqp, qp->event_type); 3516 } 3517 3518 if (!cm_id || !cm_id->event_handler) 3519 return; 3520 3521 spin_lock_irqsave(&iwdev->cm_core.ht_lock, flags); 3522 if (!iwqp->cm_node) { 3523 spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags); 3524 return; 3525 } 3526 refcount_inc(&iwqp->cm_node->refcnt); 3527 3528 spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags); 3529 3530 if (issue_disconn) { 3531 err = irdma_send_cm_event(iwqp->cm_node, cm_id, 3532 IW_CM_EVENT_DISCONNECT, 3533 disconn_status); 3534 if (err) 3535 ibdev_dbg(&iwdev->ibdev, 3536 "CM: disconnect event failed: - cm_id = %p\n", 3537 cm_id); 3538 } 3539 if (issue_close) { 3540 cm_id->provider_data = iwqp; 3541 err = irdma_send_cm_event(iwqp->cm_node, cm_id, 3542 IW_CM_EVENT_CLOSE, 0); 3543 if (err) 3544 ibdev_dbg(&iwdev->ibdev, 3545 "CM: close event failed: - cm_id = %p\n", 3546 cm_id); 3547 irdma_qp_disconnect(iwqp); 3548 } 3549 irdma_rem_ref_cm_node(iwqp->cm_node); 3550 } 3551 3552 /** 3553 * irdma_disconnect_worker - worker for connection close 3554 * @work: points or disconn structure 3555 */ 3556 static void irdma_disconnect_worker(struct work_struct *work) 3557 { 3558 struct disconn_work *dwork = container_of(work, struct disconn_work, work); 3559 struct irdma_qp *iwqp = dwork->iwqp; 3560 3561 kfree(dwork); 3562 irdma_cm_disconn_true(iwqp); 3563 irdma_qp_rem_ref(&iwqp->ibqp); 3564 } 3565 3566 /** 3567 * irdma_free_lsmm_rsrc - free lsmm memory and deregister 3568 * @iwqp: associate qp for the connection 3569 */ 3570 void irdma_free_lsmm_rsrc(struct irdma_qp *iwqp) 3571 { 3572 struct irdma_device *iwdev; 3573 3574 iwdev = iwqp->iwdev; 3575 3576 if (iwqp->ietf_mem.va) { 3577 if (iwqp->lsmm_mr) 3578 iwdev->ibdev.ops.dereg_mr(iwqp->lsmm_mr, NULL); 3579 dma_free_coherent(iwdev->rf->sc_dev.hw->device, 3580 iwqp->ietf_mem.size, iwqp->ietf_mem.va, 3581 iwqp->ietf_mem.pa); 3582 iwqp->ietf_mem.va = NULL; 3583 iwqp->ietf_mem.va = NULL; 3584 } 3585 } 3586 3587 /** 3588 * irdma_accept - registered call for connection to be accepted 3589 * @cm_id: cm information for passive connection 3590 * @conn_param: accpet parameters 3591 */ 3592 int irdma_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) 3593 { 3594 struct ib_qp *ibqp; 3595 struct irdma_qp *iwqp; 3596 struct irdma_device *iwdev; 3597 struct irdma_sc_dev *dev; 3598 struct irdma_cm_node *cm_node; 3599 struct ib_qp_attr attr = {}; 3600 int passive_state; 3601 struct ib_mr *ibmr; 3602 struct irdma_pd *iwpd; 3603 u16 buf_len = 0; 3604 struct irdma_kmem_info accept; 3605 u64 tagged_offset; 3606 int wait_ret; 3607 int ret = 0; 3608 3609 ibqp = irdma_get_qp(cm_id->device, conn_param->qpn); 3610 if (!ibqp) 3611 return -EINVAL; 3612 3613 iwqp = to_iwqp(ibqp); 3614 iwdev = iwqp->iwdev; 3615 dev = &iwdev->rf->sc_dev; 3616 cm_node = cm_id->provider_data; 3617 3618 if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) { 3619 cm_node->ipv4 = true; 3620 cm_node->vlan_id = irdma_get_vlan_ipv4(cm_node->loc_addr); 3621 } else { 3622 cm_node->ipv4 = false; 3623 irdma_netdev_vlan_ipv6(cm_node->loc_addr, &cm_node->vlan_id, 3624 NULL); 3625 } 3626 ibdev_dbg(&iwdev->ibdev, "CM: Accept vlan_id=%d\n", 3627 cm_node->vlan_id); 3628 3629 trace_irdma_accept(cm_node, 0, NULL); 3630 3631 if (cm_node->state == IRDMA_CM_STATE_LISTENER_DESTROYED) { 3632 ret = -EINVAL; 3633 goto error; 3634 } 3635 3636 passive_state = atomic_add_return(1, &cm_node->passive_state); 3637 if (passive_state == IRDMA_SEND_RESET_EVENT) { 3638 ret = -ECONNRESET; 3639 goto error; 3640 } 3641 3642 buf_len = conn_param->private_data_len + IRDMA_MAX_IETF_SIZE; 3643 iwqp->ietf_mem.size = ALIGN(buf_len, 1); 3644 iwqp->ietf_mem.va = dma_alloc_coherent(dev->hw->device, 3645 iwqp->ietf_mem.size, 3646 &iwqp->ietf_mem.pa, GFP_KERNEL); 3647 if (!iwqp->ietf_mem.va) { 3648 ret = -ENOMEM; 3649 goto error; 3650 } 3651 3652 cm_node->pdata.size = conn_param->private_data_len; 3653 accept.addr = iwqp->ietf_mem.va; 3654 accept.size = irdma_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY); 3655 memcpy((u8 *)accept.addr + accept.size, conn_param->private_data, 3656 conn_param->private_data_len); 3657 3658 if (cm_node->dev->ws_add(iwqp->sc_qp.vsi, cm_node->user_pri)) { 3659 ret = -ENOMEM; 3660 goto error; 3661 } 3662 iwqp->sc_qp.user_pri = cm_node->user_pri; 3663 irdma_qp_add_qos(&iwqp->sc_qp); 3664 /* setup our first outgoing iWarp send WQE (the IETF frame response) */ 3665 iwpd = iwqp->iwpd; 3666 tagged_offset = (uintptr_t)iwqp->ietf_mem.va; 3667 ibmr = irdma_reg_phys_mr(&iwpd->ibpd, iwqp->ietf_mem.pa, buf_len, 3668 IB_ACCESS_LOCAL_WRITE, &tagged_offset); 3669 if (IS_ERR(ibmr)) { 3670 ret = -ENOMEM; 3671 goto error; 3672 } 3673 3674 ibmr->pd = &iwpd->ibpd; 3675 ibmr->device = iwpd->ibpd.device; 3676 iwqp->lsmm_mr = ibmr; 3677 if (iwqp->page) 3678 iwqp->sc_qp.qp_uk.sq_base = kmap_local_page(iwqp->page); 3679 3680 cm_node->lsmm_size = accept.size + conn_param->private_data_len; 3681 irdma_sc_send_lsmm(&iwqp->sc_qp, iwqp->ietf_mem.va, cm_node->lsmm_size, 3682 ibmr->lkey); 3683 3684 if (iwqp->page) 3685 kunmap_local(iwqp->sc_qp.qp_uk.sq_base); 3686 3687 iwqp->cm_id = cm_id; 3688 cm_node->cm_id = cm_id; 3689 3690 cm_id->provider_data = iwqp; 3691 iwqp->active_conn = 0; 3692 iwqp->cm_node = cm_node; 3693 cm_node->iwqp = iwqp; 3694 irdma_cm_init_tsa_conn(iwqp, cm_node); 3695 irdma_qp_add_ref(&iwqp->ibqp); 3696 cm_id->add_ref(cm_id); 3697 3698 attr.qp_state = IB_QPS_RTS; 3699 cm_node->qhash_set = false; 3700 cm_node->cm_core->cm_free_ah(cm_node); 3701 3702 irdma_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); 3703 if (dev->hw_attrs.uk_attrs.feature_flags & IRDMA_FEATURE_RTS_AE) { 3704 wait_ret = wait_event_interruptible_timeout(iwqp->waitq, 3705 iwqp->rts_ae_rcvd, 3706 IRDMA_MAX_TIMEOUT); 3707 if (!wait_ret) { 3708 ibdev_dbg(&iwdev->ibdev, 3709 "CM: Slow Connection: cm_node=%p, loc_port=%d, rem_port=%d, cm_id=%p\n", 3710 cm_node, cm_node->loc_port, 3711 cm_node->rem_port, cm_node->cm_id); 3712 ret = -ECONNRESET; 3713 goto error; 3714 } 3715 } 3716 3717 irdma_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0); 3718 cm_node->accelerated = true; 3719 complete(&cm_node->establish_comp); 3720 3721 if (cm_node->accept_pend) { 3722 atomic_dec(&cm_node->listener->pend_accepts_cnt); 3723 cm_node->accept_pend = 0; 3724 } 3725 3726 ibdev_dbg(&iwdev->ibdev, 3727 "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", 3728 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr, 3729 cm_node->loc_addr, cm_node, cm_id, ibqp->qp_num); 3730 cm_node->cm_core->stats_accepts++; 3731 3732 return 0; 3733 error: 3734 irdma_free_lsmm_rsrc(iwqp); 3735 irdma_rem_ref_cm_node(cm_node); 3736 3737 return ret; 3738 } 3739 3740 /** 3741 * irdma_reject - registered call for connection to be rejected 3742 * @cm_id: cm information for passive connection 3743 * @pdata: private data to be sent 3744 * @pdata_len: private data length 3745 */ 3746 int irdma_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len) 3747 { 3748 struct irdma_device *iwdev; 3749 struct irdma_cm_node *cm_node; 3750 3751 cm_node = cm_id->provider_data; 3752 cm_node->pdata.size = pdata_len; 3753 3754 trace_irdma_reject(cm_node, 0, NULL); 3755 3756 iwdev = to_iwdev(cm_id->device); 3757 if (!iwdev) 3758 return -EINVAL; 3759 3760 cm_node->cm_core->stats_rejects++; 3761 3762 if (pdata_len + sizeof(struct ietf_mpa_v2) > IRDMA_MAX_CM_BUF) 3763 return -EINVAL; 3764 3765 return irdma_cm_reject(cm_node, pdata, pdata_len); 3766 } 3767 3768 /** 3769 * irdma_connect - registered call for connection to be established 3770 * @cm_id: cm information for passive connection 3771 * @conn_param: Information about the connection 3772 */ 3773 int irdma_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) 3774 { 3775 struct ib_qp *ibqp; 3776 struct irdma_qp *iwqp; 3777 struct irdma_device *iwdev; 3778 struct irdma_cm_node *cm_node; 3779 struct irdma_cm_info cm_info; 3780 struct sockaddr_in *laddr; 3781 struct sockaddr_in *raddr; 3782 struct sockaddr_in6 *laddr6; 3783 struct sockaddr_in6 *raddr6; 3784 int ret = 0; 3785 3786 ibqp = irdma_get_qp(cm_id->device, conn_param->qpn); 3787 if (!ibqp) 3788 return -EINVAL; 3789 iwqp = to_iwqp(ibqp); 3790 if (!iwqp) 3791 return -EINVAL; 3792 iwdev = iwqp->iwdev; 3793 if (!iwdev) 3794 return -EINVAL; 3795 3796 laddr = (struct sockaddr_in *)&cm_id->m_local_addr; 3797 raddr = (struct sockaddr_in *)&cm_id->m_remote_addr; 3798 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr; 3799 raddr6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr; 3800 3801 if (!(laddr->sin_port) || !(raddr->sin_port)) 3802 return -EINVAL; 3803 3804 iwqp->active_conn = 1; 3805 iwqp->cm_id = NULL; 3806 cm_id->provider_data = iwqp; 3807 3808 /* set up the connection params for the node */ 3809 if (cm_id->remote_addr.ss_family == AF_INET) { 3810 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV4) 3811 return -EINVAL; 3812 3813 cm_info.ipv4 = true; 3814 memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr)); 3815 memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr)); 3816 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr); 3817 cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr); 3818 cm_info.loc_port = ntohs(laddr->sin_port); 3819 cm_info.rem_port = ntohs(raddr->sin_port); 3820 cm_info.vlan_id = irdma_get_vlan_ipv4(cm_info.loc_addr); 3821 } else { 3822 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV6) 3823 return -EINVAL; 3824 3825 cm_info.ipv4 = false; 3826 irdma_copy_ip_ntohl(cm_info.loc_addr, 3827 laddr6->sin6_addr.in6_u.u6_addr32); 3828 irdma_copy_ip_ntohl(cm_info.rem_addr, 3829 raddr6->sin6_addr.in6_u.u6_addr32); 3830 cm_info.loc_port = ntohs(laddr6->sin6_port); 3831 cm_info.rem_port = ntohs(raddr6->sin6_port); 3832 irdma_netdev_vlan_ipv6(cm_info.loc_addr, &cm_info.vlan_id, 3833 NULL); 3834 } 3835 cm_info.cm_id = cm_id; 3836 cm_info.qh_qpid = iwdev->vsi.ilq->qp_id; 3837 cm_info.tos = cm_id->tos; 3838 cm_info.user_pri = rt_tos2priority(cm_id->tos); 3839 3840 if (iwqp->sc_qp.dev->ws_add(iwqp->sc_qp.vsi, cm_info.user_pri)) 3841 return -ENOMEM; 3842 iwqp->sc_qp.user_pri = cm_info.user_pri; 3843 irdma_qp_add_qos(&iwqp->sc_qp); 3844 ibdev_dbg(&iwdev->ibdev, "DCB: TOS:[%d] UP:[%d]\n", cm_id->tos, 3845 cm_info.user_pri); 3846 3847 trace_irdma_dcb_tos(iwdev, cm_id->tos, cm_info.user_pri); 3848 3849 ret = irdma_create_cm_node(&iwdev->cm_core, iwdev, conn_param, &cm_info, 3850 &cm_node); 3851 if (ret) 3852 return ret; 3853 ret = cm_node->cm_core->cm_create_ah(cm_node, true); 3854 if (ret) 3855 goto err; 3856 if (irdma_manage_qhash(iwdev, &cm_info, 3857 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 3858 IRDMA_QHASH_MANAGE_TYPE_ADD, NULL, true)) { 3859 ret = -EINVAL; 3860 goto err; 3861 } 3862 cm_node->qhash_set = true; 3863 3864 cm_node->apbvt_entry = irdma_add_apbvt(iwdev, cm_info.loc_port); 3865 if (!cm_node->apbvt_entry) { 3866 ret = -EINVAL; 3867 goto err; 3868 } 3869 3870 cm_node->apbvt_set = true; 3871 iwqp->cm_node = cm_node; 3872 cm_node->iwqp = iwqp; 3873 iwqp->cm_id = cm_id; 3874 irdma_qp_add_ref(&iwqp->ibqp); 3875 cm_id->add_ref(cm_id); 3876 3877 if (cm_node->state != IRDMA_CM_STATE_OFFLOADED) { 3878 cm_node->state = IRDMA_CM_STATE_SYN_SENT; 3879 ret = irdma_send_syn(cm_node, 0); 3880 if (ret) 3881 goto err; 3882 } 3883 3884 ibdev_dbg(&iwdev->ibdev, 3885 "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", 3886 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr, 3887 cm_node->loc_addr, cm_node, cm_id, ibqp->qp_num); 3888 3889 trace_irdma_connect(cm_node, 0, NULL); 3890 3891 return 0; 3892 3893 err: 3894 if (cm_info.ipv4) 3895 ibdev_dbg(&iwdev->ibdev, 3896 "CM: connect() FAILED: dest addr=%pI4", 3897 cm_info.rem_addr); 3898 else 3899 ibdev_dbg(&iwdev->ibdev, 3900 "CM: connect() FAILED: dest addr=%pI6", 3901 cm_info.rem_addr); 3902 irdma_rem_ref_cm_node(cm_node); 3903 iwdev->cm_core.stats_connect_errs++; 3904 3905 return ret; 3906 } 3907 3908 /** 3909 * irdma_create_listen - registered call creating listener 3910 * @cm_id: cm information for passive connection 3911 * @backlog: to max accept pending count 3912 */ 3913 int irdma_create_listen(struct iw_cm_id *cm_id, int backlog) 3914 { 3915 struct irdma_device *iwdev; 3916 struct irdma_cm_listener *cm_listen_node; 3917 struct irdma_cm_info cm_info = {}; 3918 enum irdma_status_code err; 3919 struct sockaddr_in *laddr; 3920 struct sockaddr_in6 *laddr6; 3921 bool wildcard = false; 3922 3923 iwdev = to_iwdev(cm_id->device); 3924 if (!iwdev) 3925 return -EINVAL; 3926 3927 laddr = (struct sockaddr_in *)&cm_id->m_local_addr; 3928 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr; 3929 cm_info.qh_qpid = iwdev->vsi.ilq->qp_id; 3930 3931 if (laddr->sin_family == AF_INET) { 3932 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV4) 3933 return -EINVAL; 3934 3935 cm_info.ipv4 = true; 3936 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr); 3937 cm_info.loc_port = ntohs(laddr->sin_port); 3938 3939 if (laddr->sin_addr.s_addr != htonl(INADDR_ANY)) { 3940 cm_info.vlan_id = irdma_get_vlan_ipv4(cm_info.loc_addr); 3941 } else { 3942 cm_info.vlan_id = 0xFFFF; 3943 wildcard = true; 3944 } 3945 } else { 3946 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV6) 3947 return -EINVAL; 3948 3949 cm_info.ipv4 = false; 3950 irdma_copy_ip_ntohl(cm_info.loc_addr, 3951 laddr6->sin6_addr.in6_u.u6_addr32); 3952 cm_info.loc_port = ntohs(laddr6->sin6_port); 3953 if (ipv6_addr_type(&laddr6->sin6_addr) != IPV6_ADDR_ANY) { 3954 irdma_netdev_vlan_ipv6(cm_info.loc_addr, 3955 &cm_info.vlan_id, NULL); 3956 } else { 3957 cm_info.vlan_id = 0xFFFF; 3958 wildcard = true; 3959 } 3960 } 3961 3962 if (cm_info.vlan_id >= VLAN_N_VID && iwdev->dcb) 3963 cm_info.vlan_id = 0; 3964 cm_info.backlog = backlog; 3965 cm_info.cm_id = cm_id; 3966 3967 trace_irdma_create_listen(iwdev, &cm_info); 3968 3969 cm_listen_node = irdma_make_listen_node(&iwdev->cm_core, iwdev, 3970 &cm_info); 3971 if (!cm_listen_node) { 3972 ibdev_dbg(&iwdev->ibdev, 3973 "CM: cm_listen_node == NULL\n"); 3974 return -ENOMEM; 3975 } 3976 3977 cm_id->provider_data = cm_listen_node; 3978 3979 cm_listen_node->tos = cm_id->tos; 3980 cm_listen_node->user_pri = rt_tos2priority(cm_id->tos); 3981 cm_info.user_pri = cm_listen_node->user_pri; 3982 if (!cm_listen_node->reused_node) { 3983 if (wildcard) { 3984 err = irdma_add_mqh(iwdev, &cm_info, cm_listen_node); 3985 if (err) 3986 goto error; 3987 } else { 3988 err = irdma_manage_qhash(iwdev, &cm_info, 3989 IRDMA_QHASH_TYPE_TCP_SYN, 3990 IRDMA_QHASH_MANAGE_TYPE_ADD, 3991 NULL, true); 3992 if (err) 3993 goto error; 3994 3995 cm_listen_node->qhash_set = true; 3996 } 3997 3998 cm_listen_node->apbvt_entry = irdma_add_apbvt(iwdev, 3999 cm_info.loc_port); 4000 if (!cm_listen_node->apbvt_entry) 4001 goto error; 4002 } 4003 cm_id->add_ref(cm_id); 4004 cm_listen_node->cm_core->stats_listen_created++; 4005 ibdev_dbg(&iwdev->ibdev, 4006 "CM: loc_port=0x%04x loc_addr=%pI4 cm_listen_node=%p cm_id=%p qhash_set=%d vlan_id=%d\n", 4007 cm_listen_node->loc_port, cm_listen_node->loc_addr, 4008 cm_listen_node, cm_listen_node->cm_id, 4009 cm_listen_node->qhash_set, cm_listen_node->vlan_id); 4010 4011 return 0; 4012 4013 error: 4014 4015 irdma_cm_del_listen(&iwdev->cm_core, cm_listen_node, false); 4016 4017 return -EINVAL; 4018 } 4019 4020 /** 4021 * irdma_destroy_listen - registered call to destroy listener 4022 * @cm_id: cm information for passive connection 4023 */ 4024 int irdma_destroy_listen(struct iw_cm_id *cm_id) 4025 { 4026 struct irdma_device *iwdev; 4027 4028 iwdev = to_iwdev(cm_id->device); 4029 if (cm_id->provider_data) 4030 irdma_cm_del_listen(&iwdev->cm_core, cm_id->provider_data, 4031 true); 4032 else 4033 ibdev_dbg(&iwdev->ibdev, 4034 "CM: cm_id->provider_data was NULL\n"); 4035 4036 cm_id->rem_ref(cm_id); 4037 4038 return 0; 4039 } 4040 4041 /** 4042 * irdma_teardown_list_prep - add conn nodes slated for tear down to list 4043 * @cm_core: cm's core 4044 * @teardown_list: a list to which cm_node will be selected 4045 * @ipaddr: pointer to ip address 4046 * @nfo: pointer to cm_info structure instance 4047 * @disconnect_all: flag indicating disconnect all QPs 4048 */ 4049 static void irdma_teardown_list_prep(struct irdma_cm_core *cm_core, 4050 struct list_head *teardown_list, 4051 u32 *ipaddr, 4052 struct irdma_cm_info *nfo, 4053 bool disconnect_all) 4054 { 4055 struct irdma_cm_node *cm_node; 4056 int bkt; 4057 4058 hash_for_each_rcu(cm_core->cm_hash_tbl, bkt, cm_node, list) { 4059 if ((disconnect_all || 4060 (nfo->vlan_id == cm_node->vlan_id && 4061 !memcmp(cm_node->loc_addr, ipaddr, nfo->ipv4 ? 4 : 16))) && 4062 refcount_inc_not_zero(&cm_node->refcnt)) 4063 list_add(&cm_node->teardown_entry, teardown_list); 4064 } 4065 } 4066 4067 /** 4068 * irdma_cm_event_connected - handle connected active node 4069 * @event: the info for cm_node of connection 4070 */ 4071 static void irdma_cm_event_connected(struct irdma_cm_event *event) 4072 { 4073 struct irdma_qp *iwqp; 4074 struct irdma_device *iwdev; 4075 struct irdma_cm_node *cm_node; 4076 struct irdma_sc_dev *dev; 4077 struct ib_qp_attr attr = {}; 4078 struct iw_cm_id *cm_id; 4079 int status; 4080 bool read0; 4081 int wait_ret = 0; 4082 4083 cm_node = event->cm_node; 4084 cm_id = cm_node->cm_id; 4085 iwqp = cm_id->provider_data; 4086 iwdev = iwqp->iwdev; 4087 dev = &iwdev->rf->sc_dev; 4088 if (iwqp->sc_qp.qp_uk.destroy_pending) { 4089 status = -ETIMEDOUT; 4090 goto error; 4091 } 4092 4093 irdma_cm_init_tsa_conn(iwqp, cm_node); 4094 read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO); 4095 if (iwqp->page) 4096 iwqp->sc_qp.qp_uk.sq_base = kmap_local_page(iwqp->page); 4097 irdma_sc_send_rtt(&iwqp->sc_qp, read0); 4098 if (iwqp->page) 4099 kunmap_local(iwqp->sc_qp.qp_uk.sq_base); 4100 4101 attr.qp_state = IB_QPS_RTS; 4102 cm_node->qhash_set = false; 4103 irdma_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); 4104 if (dev->hw_attrs.uk_attrs.feature_flags & IRDMA_FEATURE_RTS_AE) { 4105 wait_ret = wait_event_interruptible_timeout(iwqp->waitq, 4106 iwqp->rts_ae_rcvd, 4107 IRDMA_MAX_TIMEOUT); 4108 if (!wait_ret) 4109 ibdev_dbg(&iwdev->ibdev, 4110 "CM: Slow Connection: cm_node=%p, loc_port=%d, rem_port=%d, cm_id=%p\n", 4111 cm_node, cm_node->loc_port, 4112 cm_node->rem_port, cm_node->cm_id); 4113 } 4114 4115 irdma_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 0); 4116 cm_node->accelerated = true; 4117 complete(&cm_node->establish_comp); 4118 cm_node->cm_core->cm_free_ah(cm_node); 4119 return; 4120 4121 error: 4122 iwqp->cm_id = NULL; 4123 cm_id->provider_data = NULL; 4124 irdma_send_cm_event(event->cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 4125 status); 4126 irdma_rem_ref_cm_node(event->cm_node); 4127 } 4128 4129 /** 4130 * irdma_cm_event_reset - handle reset 4131 * @event: the info for cm_node of connection 4132 */ 4133 static void irdma_cm_event_reset(struct irdma_cm_event *event) 4134 { 4135 struct irdma_cm_node *cm_node = event->cm_node; 4136 struct iw_cm_id *cm_id = cm_node->cm_id; 4137 struct irdma_qp *iwqp; 4138 4139 if (!cm_id) 4140 return; 4141 4142 iwqp = cm_id->provider_data; 4143 if (!iwqp) 4144 return; 4145 4146 ibdev_dbg(&cm_node->iwdev->ibdev, 4147 "CM: reset event %p - cm_id = %p\n", event->cm_node, cm_id); 4148 iwqp->cm_id = NULL; 4149 4150 irdma_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT, 4151 -ECONNRESET); 4152 irdma_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0); 4153 } 4154 4155 /** 4156 * irdma_cm_event_handler - send event to cm upper layer 4157 * @work: pointer of cm event info. 4158 */ 4159 static void irdma_cm_event_handler(struct work_struct *work) 4160 { 4161 struct irdma_cm_event *event = container_of(work, struct irdma_cm_event, event_work); 4162 struct irdma_cm_node *cm_node; 4163 4164 if (!event || !event->cm_node || !event->cm_node->cm_core) 4165 return; 4166 4167 cm_node = event->cm_node; 4168 trace_irdma_cm_event_handler(cm_node, event->type, NULL); 4169 4170 switch (event->type) { 4171 case IRDMA_CM_EVENT_MPA_REQ: 4172 irdma_send_cm_event(cm_node, cm_node->cm_id, 4173 IW_CM_EVENT_CONNECT_REQUEST, 0); 4174 break; 4175 case IRDMA_CM_EVENT_RESET: 4176 irdma_cm_event_reset(event); 4177 break; 4178 case IRDMA_CM_EVENT_CONNECTED: 4179 if (!event->cm_node->cm_id || 4180 event->cm_node->state != IRDMA_CM_STATE_OFFLOADED) 4181 break; 4182 irdma_cm_event_connected(event); 4183 break; 4184 case IRDMA_CM_EVENT_MPA_REJECT: 4185 if (!event->cm_node->cm_id || 4186 cm_node->state == IRDMA_CM_STATE_OFFLOADED) 4187 break; 4188 irdma_send_cm_event(cm_node, cm_node->cm_id, 4189 IW_CM_EVENT_CONNECT_REPLY, -ECONNREFUSED); 4190 break; 4191 case IRDMA_CM_EVENT_ABORTED: 4192 if (!event->cm_node->cm_id || 4193 event->cm_node->state == IRDMA_CM_STATE_OFFLOADED) 4194 break; 4195 irdma_event_connect_error(event); 4196 break; 4197 default: 4198 ibdev_dbg(&cm_node->iwdev->ibdev, 4199 "CM: bad event type = %d\n", event->type); 4200 break; 4201 } 4202 4203 irdma_rem_ref_cm_node(event->cm_node); 4204 kfree(event); 4205 } 4206 4207 /** 4208 * irdma_cm_post_event - queue event request for worker thread 4209 * @event: cm node's info for up event call 4210 */ 4211 static void irdma_cm_post_event(struct irdma_cm_event *event) 4212 { 4213 refcount_inc(&event->cm_node->refcnt); 4214 INIT_WORK(&event->event_work, irdma_cm_event_handler); 4215 queue_work(event->cm_node->cm_core->event_wq, &event->event_work); 4216 } 4217 4218 /** 4219 * irdma_cm_teardown_connections - teardown QPs 4220 * @iwdev: device pointer 4221 * @ipaddr: Pointer to IPv4 or IPv6 address 4222 * @nfo: Connection info 4223 * @disconnect_all: flag indicating disconnect all QPs 4224 * 4225 * teardown QPs where source or destination addr matches ip addr 4226 */ 4227 void irdma_cm_teardown_connections(struct irdma_device *iwdev, u32 *ipaddr, 4228 struct irdma_cm_info *nfo, 4229 bool disconnect_all) 4230 { 4231 struct irdma_cm_core *cm_core = &iwdev->cm_core; 4232 struct list_head *list_core_temp; 4233 struct list_head *list_node; 4234 struct irdma_cm_node *cm_node; 4235 struct list_head teardown_list; 4236 struct ib_qp_attr attr; 4237 struct irdma_sc_vsi *vsi = &iwdev->vsi; 4238 struct irdma_sc_qp *sc_qp; 4239 struct irdma_qp *qp; 4240 int i; 4241 4242 INIT_LIST_HEAD(&teardown_list); 4243 4244 rcu_read_lock(); 4245 irdma_teardown_list_prep(cm_core, &teardown_list, ipaddr, nfo, disconnect_all); 4246 rcu_read_unlock(); 4247 4248 list_for_each_safe (list_node, list_core_temp, &teardown_list) { 4249 cm_node = container_of(list_node, struct irdma_cm_node, 4250 teardown_entry); 4251 attr.qp_state = IB_QPS_ERR; 4252 irdma_modify_qp(&cm_node->iwqp->ibqp, &attr, IB_QP_STATE, NULL); 4253 if (iwdev->rf->reset) 4254 irdma_cm_disconn(cm_node->iwqp); 4255 irdma_rem_ref_cm_node(cm_node); 4256 } 4257 if (!iwdev->roce_mode) 4258 return; 4259 4260 INIT_LIST_HEAD(&teardown_list); 4261 for (i = 0; i < IRDMA_MAX_USER_PRIORITY; i++) { 4262 mutex_lock(&vsi->qos[i].qos_mutex); 4263 list_for_each_safe (list_node, list_core_temp, 4264 &vsi->qos[i].qplist) { 4265 u32 qp_ip[4]; 4266 4267 sc_qp = container_of(list_node, struct irdma_sc_qp, 4268 list); 4269 if (sc_qp->qp_uk.qp_type != IRDMA_QP_TYPE_ROCE_RC) 4270 continue; 4271 4272 qp = sc_qp->qp_uk.back_qp; 4273 if (!disconnect_all) { 4274 if (nfo->ipv4) 4275 qp_ip[0] = qp->udp_info.local_ipaddr[3]; 4276 else 4277 memcpy(qp_ip, 4278 &qp->udp_info.local_ipaddr[0], 4279 sizeof(qp_ip)); 4280 } 4281 4282 if (disconnect_all || 4283 (nfo->vlan_id == (qp->udp_info.vlan_tag & VLAN_VID_MASK) && 4284 !memcmp(qp_ip, ipaddr, nfo->ipv4 ? 4 : 16))) { 4285 spin_lock(&iwdev->rf->qptable_lock); 4286 if (iwdev->rf->qp_table[sc_qp->qp_uk.qp_id]) { 4287 irdma_qp_add_ref(&qp->ibqp); 4288 list_add(&qp->teardown_entry, 4289 &teardown_list); 4290 } 4291 spin_unlock(&iwdev->rf->qptable_lock); 4292 } 4293 } 4294 mutex_unlock(&vsi->qos[i].qos_mutex); 4295 } 4296 4297 list_for_each_safe (list_node, list_core_temp, &teardown_list) { 4298 qp = container_of(list_node, struct irdma_qp, teardown_entry); 4299 attr.qp_state = IB_QPS_ERR; 4300 irdma_modify_qp_roce(&qp->ibqp, &attr, IB_QP_STATE, NULL); 4301 irdma_qp_rem_ref(&qp->ibqp); 4302 } 4303 } 4304 4305 /** 4306 * irdma_qhash_ctrl - enable/disable qhash for list 4307 * @iwdev: device pointer 4308 * @parent_listen_node: parent listen node 4309 * @nfo: cm info node 4310 * @ipaddr: Pointer to IPv4 or IPv6 address 4311 * @ipv4: flag indicating IPv4 when true 4312 * @ifup: flag indicating interface up when true 4313 * 4314 * Enables or disables the qhash for the node in the child 4315 * listen list that matches ipaddr. If no matching IP was found 4316 * it will allocate and add a new child listen node to the 4317 * parent listen node. The listen_list_lock is assumed to be 4318 * held when called. 4319 */ 4320 static void irdma_qhash_ctrl(struct irdma_device *iwdev, 4321 struct irdma_cm_listener *parent_listen_node, 4322 struct irdma_cm_info *nfo, u32 *ipaddr, bool ipv4, 4323 bool ifup) 4324 { 4325 struct list_head *child_listen_list = &parent_listen_node->child_listen_list; 4326 struct irdma_cm_listener *child_listen_node; 4327 struct list_head *pos, *tpos; 4328 enum irdma_status_code err; 4329 bool node_allocated = false; 4330 enum irdma_quad_hash_manage_type op = ifup ? 4331 IRDMA_QHASH_MANAGE_TYPE_ADD : 4332 IRDMA_QHASH_MANAGE_TYPE_DELETE; 4333 4334 list_for_each_safe (pos, tpos, child_listen_list) { 4335 child_listen_node = list_entry(pos, struct irdma_cm_listener, 4336 child_listen_list); 4337 if (!memcmp(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16)) 4338 goto set_qhash; 4339 } 4340 4341 /* if not found then add a child listener if interface is going up */ 4342 if (!ifup) 4343 return; 4344 child_listen_node = kmemdup(parent_listen_node, 4345 sizeof(*child_listen_node), GFP_ATOMIC); 4346 if (!child_listen_node) 4347 return; 4348 4349 node_allocated = true; 4350 memcpy(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16); 4351 4352 set_qhash: 4353 memcpy(nfo->loc_addr, child_listen_node->loc_addr, 4354 sizeof(nfo->loc_addr)); 4355 nfo->vlan_id = child_listen_node->vlan_id; 4356 err = irdma_manage_qhash(iwdev, nfo, IRDMA_QHASH_TYPE_TCP_SYN, op, NULL, 4357 false); 4358 if (!err) { 4359 child_listen_node->qhash_set = ifup; 4360 if (node_allocated) 4361 list_add(&child_listen_node->child_listen_list, 4362 &parent_listen_node->child_listen_list); 4363 } else if (node_allocated) { 4364 kfree(child_listen_node); 4365 } 4366 } 4367 4368 /** 4369 * irdma_if_notify - process an ifdown on an interface 4370 * @iwdev: device pointer 4371 * @netdev: network device structure 4372 * @ipaddr: Pointer to IPv4 or IPv6 address 4373 * @ipv4: flag indicating IPv4 when true 4374 * @ifup: flag indicating interface up when true 4375 */ 4376 void irdma_if_notify(struct irdma_device *iwdev, struct net_device *netdev, 4377 u32 *ipaddr, bool ipv4, bool ifup) 4378 { 4379 struct irdma_cm_core *cm_core = &iwdev->cm_core; 4380 unsigned long flags; 4381 struct irdma_cm_listener *listen_node; 4382 static const u32 ip_zero[4] = { 0, 0, 0, 0 }; 4383 struct irdma_cm_info nfo = {}; 4384 u16 vlan_id = rdma_vlan_dev_vlan_id(netdev); 4385 enum irdma_quad_hash_manage_type op = ifup ? 4386 IRDMA_QHASH_MANAGE_TYPE_ADD : 4387 IRDMA_QHASH_MANAGE_TYPE_DELETE; 4388 4389 nfo.vlan_id = vlan_id; 4390 nfo.ipv4 = ipv4; 4391 nfo.qh_qpid = 1; 4392 4393 /* Disable or enable qhash for listeners */ 4394 spin_lock_irqsave(&cm_core->listen_list_lock, flags); 4395 list_for_each_entry (listen_node, &cm_core->listen_list, list) { 4396 if (vlan_id != listen_node->vlan_id || 4397 (memcmp(listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16) && 4398 memcmp(listen_node->loc_addr, ip_zero, ipv4 ? 4 : 16))) 4399 continue; 4400 4401 memcpy(nfo.loc_addr, listen_node->loc_addr, 4402 sizeof(nfo.loc_addr)); 4403 nfo.loc_port = listen_node->loc_port; 4404 nfo.user_pri = listen_node->user_pri; 4405 if (!list_empty(&listen_node->child_listen_list)) { 4406 irdma_qhash_ctrl(iwdev, listen_node, &nfo, ipaddr, ipv4, 4407 ifup); 4408 } else if (memcmp(listen_node->loc_addr, ip_zero, 4409 ipv4 ? 4 : 16)) { 4410 if (!irdma_manage_qhash(iwdev, &nfo, 4411 IRDMA_QHASH_TYPE_TCP_SYN, op, 4412 NULL, false)) 4413 listen_node->qhash_set = ifup; 4414 } 4415 } 4416 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); 4417 4418 /* disconnect any connected qp's on ifdown */ 4419 if (!ifup) 4420 irdma_cm_teardown_connections(iwdev, ipaddr, &nfo, false); 4421 } 4422