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 int irdma_del_multiple_qhash(struct irdma_device *iwdev, 1505 struct irdma_cm_info *cm_info, 1506 struct irdma_cm_listener *cm_parent_listen_node) 1507 { 1508 struct irdma_cm_listener *child_listen_node; 1509 struct list_head *pos, *tpos; 1510 unsigned long flags; 1511 int ret = -EINVAL; 1512 1513 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags); 1514 list_for_each_safe (pos, tpos, 1515 &cm_parent_listen_node->child_listen_list) { 1516 child_listen_node = list_entry(pos, struct irdma_cm_listener, 1517 child_listen_list); 1518 if (child_listen_node->ipv4) 1519 ibdev_dbg(&iwdev->ibdev, 1520 "CM: removing child listen for IP=%pI4, port=%d, vlan=%d\n", 1521 child_listen_node->loc_addr, 1522 child_listen_node->loc_port, 1523 child_listen_node->vlan_id); 1524 else 1525 ibdev_dbg(&iwdev->ibdev, 1526 "CM: removing child listen for IP=%pI6, port=%d, vlan=%d\n", 1527 child_listen_node->loc_addr, 1528 child_listen_node->loc_port, 1529 child_listen_node->vlan_id); 1530 trace_irdma_del_multiple_qhash(child_listen_node); 1531 list_del(pos); 1532 memcpy(cm_info->loc_addr, child_listen_node->loc_addr, 1533 sizeof(cm_info->loc_addr)); 1534 cm_info->vlan_id = child_listen_node->vlan_id; 1535 if (child_listen_node->qhash_set) { 1536 ret = irdma_manage_qhash(iwdev, cm_info, 1537 IRDMA_QHASH_TYPE_TCP_SYN, 1538 IRDMA_QHASH_MANAGE_TYPE_DELETE, 1539 NULL, false); 1540 child_listen_node->qhash_set = false; 1541 } else { 1542 ret = 0; 1543 } 1544 ibdev_dbg(&iwdev->ibdev, 1545 "CM: Child listen node freed = %p\n", 1546 child_listen_node); 1547 kfree(child_listen_node); 1548 cm_parent_listen_node->cm_core->stats_listen_nodes_destroyed++; 1549 } 1550 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); 1551 1552 return ret; 1553 } 1554 1555 /** 1556 * irdma_netdev_vlan_ipv6 - Gets the netdev and mac 1557 * @addr: local IPv6 address 1558 * @vlan_id: vlan id for the given IPv6 address 1559 * @mac: mac address for the given IPv6 address 1560 * 1561 * Returns the net_device of the IPv6 address and also sets the 1562 * vlan id and mac for that address. 1563 */ 1564 struct net_device *irdma_netdev_vlan_ipv6(u32 *addr, u16 *vlan_id, u8 *mac) 1565 { 1566 struct net_device *ip_dev = NULL; 1567 struct in6_addr laddr6; 1568 1569 if (!IS_ENABLED(CONFIG_IPV6)) 1570 return NULL; 1571 1572 irdma_copy_ip_htonl(laddr6.in6_u.u6_addr32, addr); 1573 if (vlan_id) 1574 *vlan_id = 0xFFFF; /* Match rdma_vlan_dev_vlan_id() */ 1575 if (mac) 1576 eth_zero_addr(mac); 1577 1578 rcu_read_lock(); 1579 for_each_netdev_rcu (&init_net, ip_dev) { 1580 if (ipv6_chk_addr(&init_net, &laddr6, ip_dev, 1)) { 1581 if (vlan_id) 1582 *vlan_id = rdma_vlan_dev_vlan_id(ip_dev); 1583 if (ip_dev->dev_addr && mac) 1584 ether_addr_copy(mac, ip_dev->dev_addr); 1585 break; 1586 } 1587 } 1588 rcu_read_unlock(); 1589 1590 return ip_dev; 1591 } 1592 1593 /** 1594 * irdma_get_vlan_ipv4 - Returns the vlan_id for IPv4 address 1595 * @addr: local IPv4 address 1596 */ 1597 u16 irdma_get_vlan_ipv4(u32 *addr) 1598 { 1599 struct net_device *netdev; 1600 u16 vlan_id = 0xFFFF; 1601 1602 netdev = ip_dev_find(&init_net, htonl(addr[0])); 1603 if (netdev) { 1604 vlan_id = rdma_vlan_dev_vlan_id(netdev); 1605 dev_put(netdev); 1606 } 1607 1608 return vlan_id; 1609 } 1610 1611 /** 1612 * irdma_add_mqh_6 - Adds multiple qhashes for IPv6 1613 * @iwdev: iWarp device 1614 * @cm_info: CM info for parent listen node 1615 * @cm_parent_listen_node: The parent listen node 1616 * 1617 * Adds a qhash and a child listen node for every IPv6 address 1618 * on the adapter and adds the associated qhash filter 1619 */ 1620 static int irdma_add_mqh_6(struct irdma_device *iwdev, 1621 struct irdma_cm_info *cm_info, 1622 struct irdma_cm_listener *cm_parent_listen_node) 1623 { 1624 struct net_device *ip_dev; 1625 struct inet6_dev *idev; 1626 struct inet6_ifaddr *ifp, *tmp; 1627 struct irdma_cm_listener *child_listen_node; 1628 unsigned long flags; 1629 int ret = 0; 1630 1631 rtnl_lock(); 1632 for_each_netdev(&init_net, ip_dev) { 1633 if (!(ip_dev->flags & IFF_UP)) 1634 continue; 1635 1636 if (((rdma_vlan_dev_vlan_id(ip_dev) >= VLAN_N_VID) || 1637 (rdma_vlan_dev_real_dev(ip_dev) != iwdev->netdev)) && 1638 ip_dev != iwdev->netdev) 1639 continue; 1640 1641 idev = __in6_dev_get(ip_dev); 1642 if (!idev) { 1643 ibdev_dbg(&iwdev->ibdev, "CM: idev == NULL\n"); 1644 break; 1645 } 1646 list_for_each_entry_safe (ifp, tmp, &idev->addr_list, if_list) { 1647 ibdev_dbg(&iwdev->ibdev, "CM: IP=%pI6, vlan_id=%d, MAC=%pM\n", 1648 &ifp->addr, rdma_vlan_dev_vlan_id(ip_dev), 1649 ip_dev->dev_addr); 1650 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_KERNEL); 1651 ibdev_dbg(&iwdev->ibdev, "CM: Allocating child listener %p\n", 1652 child_listen_node); 1653 if (!child_listen_node) { 1654 ibdev_dbg(&iwdev->ibdev, "CM: listener memory allocation\n"); 1655 ret = -ENOMEM; 1656 goto exit; 1657 } 1658 1659 cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev); 1660 cm_parent_listen_node->vlan_id = cm_info->vlan_id; 1661 memcpy(child_listen_node, cm_parent_listen_node, 1662 sizeof(*child_listen_node)); 1663 irdma_copy_ip_ntohl(child_listen_node->loc_addr, 1664 ifp->addr.in6_u.u6_addr32); 1665 memcpy(cm_info->loc_addr, child_listen_node->loc_addr, 1666 sizeof(cm_info->loc_addr)); 1667 ret = irdma_manage_qhash(iwdev, cm_info, 1668 IRDMA_QHASH_TYPE_TCP_SYN, 1669 IRDMA_QHASH_MANAGE_TYPE_ADD, 1670 NULL, true); 1671 if (ret) { 1672 kfree(child_listen_node); 1673 continue; 1674 } 1675 1676 trace_irdma_add_mqh_6(iwdev, child_listen_node, 1677 ip_dev->dev_addr); 1678 1679 child_listen_node->qhash_set = true; 1680 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags); 1681 list_add(&child_listen_node->child_listen_list, 1682 &cm_parent_listen_node->child_listen_list); 1683 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); 1684 cm_parent_listen_node->cm_core->stats_listen_nodes_created++; 1685 } 1686 } 1687 exit: 1688 rtnl_unlock(); 1689 1690 return ret; 1691 } 1692 1693 /** 1694 * irdma_add_mqh_4 - Adds multiple qhashes for IPv4 1695 * @iwdev: iWarp device 1696 * @cm_info: CM info for parent listen node 1697 * @cm_parent_listen_node: The parent listen node 1698 * 1699 * Adds a qhash and a child listen node for every IPv4 address 1700 * on the adapter and adds the associated qhash filter 1701 */ 1702 static int irdma_add_mqh_4(struct irdma_device *iwdev, 1703 struct irdma_cm_info *cm_info, 1704 struct irdma_cm_listener *cm_parent_listen_node) 1705 { 1706 struct net_device *ip_dev; 1707 struct in_device *idev; 1708 struct irdma_cm_listener *child_listen_node; 1709 unsigned long flags; 1710 const struct in_ifaddr *ifa; 1711 int ret = 0; 1712 1713 rtnl_lock(); 1714 for_each_netdev(&init_net, ip_dev) { 1715 if (!(ip_dev->flags & IFF_UP)) 1716 continue; 1717 1718 if (((rdma_vlan_dev_vlan_id(ip_dev) >= VLAN_N_VID) || 1719 (rdma_vlan_dev_real_dev(ip_dev) != iwdev->netdev)) && 1720 ip_dev != iwdev->netdev) 1721 continue; 1722 1723 idev = in_dev_get(ip_dev); 1724 in_dev_for_each_ifa_rtnl(ifa, idev) { 1725 ibdev_dbg(&iwdev->ibdev, 1726 "CM: Allocating child CM Listener forIP=%pI4, vlan_id=%d, MAC=%pM\n", 1727 &ifa->ifa_address, rdma_vlan_dev_vlan_id(ip_dev), 1728 ip_dev->dev_addr); 1729 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_KERNEL); 1730 cm_parent_listen_node->cm_core->stats_listen_nodes_created++; 1731 ibdev_dbg(&iwdev->ibdev, "CM: Allocating child listener %p\n", 1732 child_listen_node); 1733 if (!child_listen_node) { 1734 ibdev_dbg(&iwdev->ibdev, "CM: listener memory allocation\n"); 1735 in_dev_put(idev); 1736 ret = -ENOMEM; 1737 goto exit; 1738 } 1739 1740 cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev); 1741 cm_parent_listen_node->vlan_id = cm_info->vlan_id; 1742 memcpy(child_listen_node, cm_parent_listen_node, 1743 sizeof(*child_listen_node)); 1744 child_listen_node->loc_addr[0] = 1745 ntohl(ifa->ifa_address); 1746 memcpy(cm_info->loc_addr, child_listen_node->loc_addr, 1747 sizeof(cm_info->loc_addr)); 1748 ret = irdma_manage_qhash(iwdev, cm_info, 1749 IRDMA_QHASH_TYPE_TCP_SYN, 1750 IRDMA_QHASH_MANAGE_TYPE_ADD, 1751 NULL, true); 1752 if (ret) { 1753 kfree(child_listen_node); 1754 cm_parent_listen_node->cm_core 1755 ->stats_listen_nodes_created--; 1756 continue; 1757 } 1758 1759 trace_irdma_add_mqh_4(iwdev, child_listen_node, 1760 ip_dev->dev_addr); 1761 1762 child_listen_node->qhash_set = true; 1763 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, 1764 flags); 1765 list_add(&child_listen_node->child_listen_list, 1766 &cm_parent_listen_node->child_listen_list); 1767 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); 1768 } 1769 in_dev_put(idev); 1770 } 1771 exit: 1772 rtnl_unlock(); 1773 1774 return ret; 1775 } 1776 1777 /** 1778 * irdma_add_mqh - Adds multiple qhashes 1779 * @iwdev: iWarp device 1780 * @cm_info: CM info for parent listen node 1781 * @cm_listen_node: The parent listen node 1782 */ 1783 static int irdma_add_mqh(struct irdma_device *iwdev, 1784 struct irdma_cm_info *cm_info, 1785 struct irdma_cm_listener *cm_listen_node) 1786 { 1787 if (cm_info->ipv4) 1788 return irdma_add_mqh_4(iwdev, cm_info, cm_listen_node); 1789 else 1790 return irdma_add_mqh_6(iwdev, cm_info, cm_listen_node); 1791 } 1792 1793 /** 1794 * irdma_reset_list_prep - add connection nodes slated for reset to list 1795 * @cm_core: cm's core 1796 * @listener: pointer to listener node 1797 * @reset_list: a list to which cm_node will be selected 1798 */ 1799 static void irdma_reset_list_prep(struct irdma_cm_core *cm_core, 1800 struct irdma_cm_listener *listener, 1801 struct list_head *reset_list) 1802 { 1803 struct irdma_cm_node *cm_node; 1804 int bkt; 1805 1806 hash_for_each_rcu(cm_core->cm_hash_tbl, bkt, cm_node, list) { 1807 if (cm_node->listener == listener && 1808 !cm_node->accelerated && 1809 refcount_inc_not_zero(&cm_node->refcnt)) 1810 list_add(&cm_node->reset_entry, reset_list); 1811 } 1812 } 1813 1814 /** 1815 * irdma_dec_refcnt_listen - delete listener and associated cm nodes 1816 * @cm_core: cm's core 1817 * @listener: pointer to listener node 1818 * @free_hanging_nodes: to free associated cm_nodes 1819 * @apbvt_del: flag to delete the apbvt 1820 */ 1821 static int irdma_dec_refcnt_listen(struct irdma_cm_core *cm_core, 1822 struct irdma_cm_listener *listener, 1823 int free_hanging_nodes, bool apbvt_del) 1824 { 1825 int err; 1826 struct list_head *list_pos; 1827 struct list_head *list_temp; 1828 struct irdma_cm_node *cm_node; 1829 struct list_head reset_list; 1830 struct irdma_cm_info nfo; 1831 enum irdma_cm_node_state old_state; 1832 unsigned long flags; 1833 1834 trace_irdma_dec_refcnt_listen(listener, __builtin_return_address(0)); 1835 /* free non-accelerated child nodes for this listener */ 1836 INIT_LIST_HEAD(&reset_list); 1837 if (free_hanging_nodes) { 1838 rcu_read_lock(); 1839 irdma_reset_list_prep(cm_core, listener, &reset_list); 1840 rcu_read_unlock(); 1841 } 1842 1843 list_for_each_safe (list_pos, list_temp, &reset_list) { 1844 cm_node = container_of(list_pos, struct irdma_cm_node, 1845 reset_entry); 1846 if (cm_node->state >= IRDMA_CM_STATE_FIN_WAIT1) { 1847 irdma_rem_ref_cm_node(cm_node); 1848 continue; 1849 } 1850 1851 irdma_cleanup_retrans_entry(cm_node); 1852 err = irdma_send_reset(cm_node); 1853 if (err) { 1854 cm_node->state = IRDMA_CM_STATE_CLOSED; 1855 ibdev_dbg(&cm_node->iwdev->ibdev, 1856 "CM: send reset failed\n"); 1857 } else { 1858 old_state = cm_node->state; 1859 cm_node->state = IRDMA_CM_STATE_LISTENER_DESTROYED; 1860 if (old_state != IRDMA_CM_STATE_MPAREQ_RCVD) 1861 irdma_rem_ref_cm_node(cm_node); 1862 } 1863 } 1864 1865 if (refcount_dec_and_test(&listener->refcnt)) { 1866 spin_lock_irqsave(&cm_core->listen_list_lock, flags); 1867 list_del(&listener->list); 1868 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); 1869 1870 if (apbvt_del) 1871 irdma_del_apbvt(listener->iwdev, 1872 listener->apbvt_entry); 1873 memcpy(nfo.loc_addr, listener->loc_addr, sizeof(nfo.loc_addr)); 1874 nfo.loc_port = listener->loc_port; 1875 nfo.ipv4 = listener->ipv4; 1876 nfo.vlan_id = listener->vlan_id; 1877 nfo.user_pri = listener->user_pri; 1878 nfo.qh_qpid = listener->iwdev->vsi.ilq->qp_id; 1879 1880 if (!list_empty(&listener->child_listen_list)) { 1881 irdma_del_multiple_qhash(listener->iwdev, &nfo, 1882 listener); 1883 } else { 1884 if (listener->qhash_set) 1885 irdma_manage_qhash(listener->iwdev, 1886 &nfo, 1887 IRDMA_QHASH_TYPE_TCP_SYN, 1888 IRDMA_QHASH_MANAGE_TYPE_DELETE, 1889 NULL, false); 1890 } 1891 1892 cm_core->stats_listen_destroyed++; 1893 cm_core->stats_listen_nodes_destroyed++; 1894 ibdev_dbg(&listener->iwdev->ibdev, 1895 "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", 1896 listener->loc_port, listener->loc_addr, listener, 1897 listener->cm_id, listener->qhash_set, 1898 listener->vlan_id, apbvt_del); 1899 kfree(listener); 1900 listener = NULL; 1901 return 0; 1902 } 1903 1904 return -EINVAL; 1905 } 1906 1907 /** 1908 * irdma_cm_del_listen - delete a listener 1909 * @cm_core: cm's core 1910 * @listener: passive connection's listener 1911 * @apbvt_del: flag to delete apbvt 1912 */ 1913 static int irdma_cm_del_listen(struct irdma_cm_core *cm_core, 1914 struct irdma_cm_listener *listener, 1915 bool apbvt_del) 1916 { 1917 listener->listener_state = IRDMA_CM_LISTENER_PASSIVE_STATE; 1918 listener->cm_id = NULL; 1919 1920 return irdma_dec_refcnt_listen(cm_core, listener, 1, apbvt_del); 1921 } 1922 1923 /** 1924 * irdma_addr_resolve_neigh - resolve neighbor address 1925 * @iwdev: iwarp device structure 1926 * @src_ip: local ip address 1927 * @dst_ip: remote ip address 1928 * @arpindex: if there is an arp entry 1929 */ 1930 static int irdma_addr_resolve_neigh(struct irdma_device *iwdev, u32 src_ip, 1931 u32 dst_ip, int arpindex) 1932 { 1933 struct rtable *rt; 1934 struct neighbour *neigh; 1935 int rc = arpindex; 1936 __be32 dst_ipaddr = htonl(dst_ip); 1937 __be32 src_ipaddr = htonl(src_ip); 1938 1939 rt = ip_route_output(&init_net, dst_ipaddr, src_ipaddr, 0, 0); 1940 if (IS_ERR(rt)) { 1941 ibdev_dbg(&iwdev->ibdev, "CM: ip_route_output fail\n"); 1942 return -EINVAL; 1943 } 1944 1945 neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr); 1946 if (!neigh) 1947 goto exit; 1948 1949 if (neigh->nud_state & NUD_VALID) 1950 rc = irdma_add_arp(iwdev->rf, &dst_ip, true, neigh->ha); 1951 else 1952 neigh_event_send(neigh, NULL); 1953 if (neigh) 1954 neigh_release(neigh); 1955 exit: 1956 ip_rt_put(rt); 1957 1958 return rc; 1959 } 1960 1961 /** 1962 * irdma_get_dst_ipv6 - get destination cache entry via ipv6 lookup 1963 * @src_addr: local ipv6 sock address 1964 * @dst_addr: destination ipv6 sock address 1965 */ 1966 static struct dst_entry *irdma_get_dst_ipv6(struct sockaddr_in6 *src_addr, 1967 struct sockaddr_in6 *dst_addr) 1968 { 1969 struct dst_entry *dst = NULL; 1970 1971 if ((IS_ENABLED(CONFIG_IPV6))) { 1972 struct flowi6 fl6 = {}; 1973 1974 fl6.daddr = dst_addr->sin6_addr; 1975 fl6.saddr = src_addr->sin6_addr; 1976 if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL) 1977 fl6.flowi6_oif = dst_addr->sin6_scope_id; 1978 1979 dst = ip6_route_output(&init_net, NULL, &fl6); 1980 } 1981 1982 return dst; 1983 } 1984 1985 /** 1986 * irdma_addr_resolve_neigh_ipv6 - resolve neighbor ipv6 address 1987 * @iwdev: iwarp device structure 1988 * @src: local ip address 1989 * @dest: remote ip address 1990 * @arpindex: if there is an arp entry 1991 */ 1992 static int irdma_addr_resolve_neigh_ipv6(struct irdma_device *iwdev, u32 *src, 1993 u32 *dest, int arpindex) 1994 { 1995 struct neighbour *neigh; 1996 int rc = arpindex; 1997 struct dst_entry *dst; 1998 struct sockaddr_in6 dst_addr = {}; 1999 struct sockaddr_in6 src_addr = {}; 2000 2001 dst_addr.sin6_family = AF_INET6; 2002 irdma_copy_ip_htonl(dst_addr.sin6_addr.in6_u.u6_addr32, dest); 2003 src_addr.sin6_family = AF_INET6; 2004 irdma_copy_ip_htonl(src_addr.sin6_addr.in6_u.u6_addr32, src); 2005 dst = irdma_get_dst_ipv6(&src_addr, &dst_addr); 2006 if (!dst || dst->error) { 2007 if (dst) { 2008 dst_release(dst); 2009 ibdev_dbg(&iwdev->ibdev, 2010 "CM: ip6_route_output returned dst->error = %d\n", 2011 dst->error); 2012 } 2013 return -EINVAL; 2014 } 2015 2016 neigh = dst_neigh_lookup(dst, dst_addr.sin6_addr.in6_u.u6_addr32); 2017 if (!neigh) 2018 goto exit; 2019 2020 ibdev_dbg(&iwdev->ibdev, "CM: dst_neigh_lookup MAC=%pM\n", 2021 neigh->ha); 2022 2023 trace_irdma_addr_resolve(iwdev, neigh->ha); 2024 2025 if (neigh->nud_state & NUD_VALID) 2026 rc = irdma_add_arp(iwdev->rf, dest, false, neigh->ha); 2027 else 2028 neigh_event_send(neigh, NULL); 2029 if (neigh) 2030 neigh_release(neigh); 2031 exit: 2032 dst_release(dst); 2033 2034 return rc; 2035 } 2036 2037 /** 2038 * irdma_find_node - find a cm node that matches the reference cm node 2039 * @cm_core: cm's core 2040 * @rem_port: remote tcp port num 2041 * @rem_addr: remote ip addr 2042 * @loc_port: local tcp port num 2043 * @loc_addr: local ip addr 2044 * @vlan_id: local VLAN ID 2045 */ 2046 struct irdma_cm_node *irdma_find_node(struct irdma_cm_core *cm_core, 2047 u16 rem_port, u32 *rem_addr, u16 loc_port, 2048 u32 *loc_addr, u16 vlan_id) 2049 { 2050 struct irdma_cm_node *cm_node; 2051 u32 key = (rem_port << 16) | loc_port; 2052 2053 rcu_read_lock(); 2054 hash_for_each_possible_rcu(cm_core->cm_hash_tbl, cm_node, list, key) { 2055 if (cm_node->vlan_id == vlan_id && 2056 cm_node->loc_port == loc_port && cm_node->rem_port == rem_port && 2057 !memcmp(cm_node->loc_addr, loc_addr, sizeof(cm_node->loc_addr)) && 2058 !memcmp(cm_node->rem_addr, rem_addr, sizeof(cm_node->rem_addr))) { 2059 if (!refcount_inc_not_zero(&cm_node->refcnt)) 2060 goto exit; 2061 rcu_read_unlock(); 2062 trace_irdma_find_node(cm_node, 0, NULL); 2063 return cm_node; 2064 } 2065 } 2066 2067 exit: 2068 rcu_read_unlock(); 2069 2070 /* no owner node */ 2071 return NULL; 2072 } 2073 2074 /** 2075 * irdma_add_hte_node - add a cm node to the hash table 2076 * @cm_core: cm's core 2077 * @cm_node: connection's node 2078 */ 2079 static void irdma_add_hte_node(struct irdma_cm_core *cm_core, 2080 struct irdma_cm_node *cm_node) 2081 { 2082 unsigned long flags; 2083 u32 key = (cm_node->rem_port << 16) | cm_node->loc_port; 2084 2085 spin_lock_irqsave(&cm_core->ht_lock, flags); 2086 hash_add_rcu(cm_core->cm_hash_tbl, &cm_node->list, key); 2087 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 2088 } 2089 2090 /** 2091 * irdma_ipv4_is_lpb - check if loopback 2092 * @loc_addr: local addr to compare 2093 * @rem_addr: remote address 2094 */ 2095 bool irdma_ipv4_is_lpb(u32 loc_addr, u32 rem_addr) 2096 { 2097 return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr); 2098 } 2099 2100 /** 2101 * irdma_ipv6_is_lpb - check if loopback 2102 * @loc_addr: local addr to compare 2103 * @rem_addr: remote address 2104 */ 2105 bool irdma_ipv6_is_lpb(u32 *loc_addr, u32 *rem_addr) 2106 { 2107 struct in6_addr raddr6; 2108 2109 irdma_copy_ip_htonl(raddr6.in6_u.u6_addr32, rem_addr); 2110 2111 return !memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6); 2112 } 2113 2114 /** 2115 * irdma_cm_create_ah - create a cm address handle 2116 * @cm_node: The connection manager node to create AH for 2117 * @wait: Provides option to wait for ah creation or not 2118 */ 2119 static int irdma_cm_create_ah(struct irdma_cm_node *cm_node, bool wait) 2120 { 2121 struct irdma_ah_info ah_info = {}; 2122 struct irdma_device *iwdev = cm_node->iwdev; 2123 2124 ether_addr_copy(ah_info.mac_addr, iwdev->netdev->dev_addr); 2125 2126 ah_info.hop_ttl = 0x40; 2127 ah_info.tc_tos = cm_node->tos; 2128 ah_info.vsi = &iwdev->vsi; 2129 2130 if (cm_node->ipv4) { 2131 ah_info.ipv4_valid = true; 2132 ah_info.dest_ip_addr[0] = cm_node->rem_addr[0]; 2133 ah_info.src_ip_addr[0] = cm_node->loc_addr[0]; 2134 ah_info.do_lpbk = irdma_ipv4_is_lpb(ah_info.src_ip_addr[0], 2135 ah_info.dest_ip_addr[0]); 2136 } else { 2137 memcpy(ah_info.dest_ip_addr, cm_node->rem_addr, 2138 sizeof(ah_info.dest_ip_addr)); 2139 memcpy(ah_info.src_ip_addr, cm_node->loc_addr, 2140 sizeof(ah_info.src_ip_addr)); 2141 ah_info.do_lpbk = irdma_ipv6_is_lpb(ah_info.src_ip_addr, 2142 ah_info.dest_ip_addr); 2143 } 2144 2145 ah_info.vlan_tag = cm_node->vlan_id; 2146 if (cm_node->vlan_id < VLAN_N_VID) { 2147 ah_info.insert_vlan_tag = 1; 2148 ah_info.vlan_tag |= cm_node->user_pri << VLAN_PRIO_SHIFT; 2149 } 2150 2151 ah_info.dst_arpindex = 2152 irdma_arp_table(iwdev->rf, ah_info.dest_ip_addr, 2153 ah_info.ipv4_valid, NULL, IRDMA_ARP_RESOLVE); 2154 2155 if (irdma_puda_create_ah(&iwdev->rf->sc_dev, &ah_info, wait, 2156 IRDMA_PUDA_RSRC_TYPE_ILQ, cm_node, 2157 &cm_node->ah)) 2158 return -ENOMEM; 2159 2160 trace_irdma_create_ah(cm_node); 2161 return 0; 2162 } 2163 2164 /** 2165 * irdma_cm_free_ah - free a cm address handle 2166 * @cm_node: The connection manager node to create AH for 2167 */ 2168 static void irdma_cm_free_ah(struct irdma_cm_node *cm_node) 2169 { 2170 struct irdma_device *iwdev = cm_node->iwdev; 2171 2172 trace_irdma_cm_free_ah(cm_node); 2173 irdma_puda_free_ah(&iwdev->rf->sc_dev, cm_node->ah); 2174 cm_node->ah = NULL; 2175 } 2176 2177 /** 2178 * irdma_make_cm_node - create a new instance of a cm node 2179 * @cm_core: cm's core 2180 * @iwdev: iwarp device structure 2181 * @cm_info: quad info for connection 2182 * @listener: passive connection's listener 2183 */ 2184 static struct irdma_cm_node * 2185 irdma_make_cm_node(struct irdma_cm_core *cm_core, struct irdma_device *iwdev, 2186 struct irdma_cm_info *cm_info, 2187 struct irdma_cm_listener *listener) 2188 { 2189 struct irdma_cm_node *cm_node; 2190 int oldarpindex; 2191 int arpindex; 2192 struct net_device *netdev = iwdev->netdev; 2193 2194 /* create an hte and cm_node for this instance */ 2195 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC); 2196 if (!cm_node) 2197 return NULL; 2198 2199 /* set our node specific transport info */ 2200 cm_node->ipv4 = cm_info->ipv4; 2201 cm_node->vlan_id = cm_info->vlan_id; 2202 if (cm_node->vlan_id >= VLAN_N_VID && iwdev->dcb_vlan_mode) 2203 cm_node->vlan_id = 0; 2204 cm_node->tos = cm_info->tos; 2205 cm_node->user_pri = cm_info->user_pri; 2206 if (listener) { 2207 if (listener->tos != cm_info->tos) 2208 ibdev_warn(&iwdev->ibdev, 2209 "application TOS[%d] and remote client TOS[%d] mismatch\n", 2210 listener->tos, cm_info->tos); 2211 if (iwdev->vsi.dscp_mode) { 2212 cm_node->user_pri = listener->user_pri; 2213 } else { 2214 cm_node->tos = max(listener->tos, cm_info->tos); 2215 cm_node->user_pri = rt_tos2priority(cm_node->tos); 2216 } 2217 ibdev_dbg(&iwdev->ibdev, 2218 "DCB: listener: TOS:[%d] UP:[%d]\n", cm_node->tos, 2219 cm_node->user_pri); 2220 trace_irdma_listener_tos(iwdev, cm_node->tos, 2221 cm_node->user_pri); 2222 } 2223 memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr)); 2224 memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr)); 2225 cm_node->loc_port = cm_info->loc_port; 2226 cm_node->rem_port = cm_info->rem_port; 2227 2228 cm_node->mpa_frame_rev = IRDMA_CM_DEFAULT_MPA_VER; 2229 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO; 2230 cm_node->iwdev = iwdev; 2231 cm_node->dev = &iwdev->rf->sc_dev; 2232 2233 cm_node->ird_size = cm_node->dev->hw_attrs.max_hw_ird; 2234 cm_node->ord_size = cm_node->dev->hw_attrs.max_hw_ord; 2235 2236 cm_node->listener = listener; 2237 cm_node->cm_id = cm_info->cm_id; 2238 ether_addr_copy(cm_node->loc_mac, netdev->dev_addr); 2239 spin_lock_init(&cm_node->retrans_list_lock); 2240 cm_node->ack_rcvd = false; 2241 2242 init_completion(&cm_node->establish_comp); 2243 refcount_set(&cm_node->refcnt, 1); 2244 /* associate our parent CM core */ 2245 cm_node->cm_core = cm_core; 2246 cm_node->tcp_cntxt.loc_id = IRDMA_CM_DEFAULT_LOCAL_ID; 2247 cm_node->tcp_cntxt.rcv_wscale = iwdev->rcv_wscale; 2248 cm_node->tcp_cntxt.rcv_wnd = iwdev->rcv_wnd >> cm_node->tcp_cntxt.rcv_wscale; 2249 if (cm_node->ipv4) { 2250 cm_node->tcp_cntxt.loc_seq_num = secure_tcp_seq(htonl(cm_node->loc_addr[0]), 2251 htonl(cm_node->rem_addr[0]), 2252 htons(cm_node->loc_port), 2253 htons(cm_node->rem_port)); 2254 cm_node->tcp_cntxt.mss = iwdev->vsi.mtu - IRDMA_MTU_TO_MSS_IPV4; 2255 } else if (IS_ENABLED(CONFIG_IPV6)) { 2256 __be32 loc[4] = { 2257 htonl(cm_node->loc_addr[0]), htonl(cm_node->loc_addr[1]), 2258 htonl(cm_node->loc_addr[2]), htonl(cm_node->loc_addr[3]) 2259 }; 2260 __be32 rem[4] = { 2261 htonl(cm_node->rem_addr[0]), htonl(cm_node->rem_addr[1]), 2262 htonl(cm_node->rem_addr[2]), htonl(cm_node->rem_addr[3]) 2263 }; 2264 cm_node->tcp_cntxt.loc_seq_num = secure_tcpv6_seq(loc, rem, 2265 htons(cm_node->loc_port), 2266 htons(cm_node->rem_port)); 2267 cm_node->tcp_cntxt.mss = iwdev->vsi.mtu - IRDMA_MTU_TO_MSS_IPV6; 2268 } 2269 2270 if ((cm_node->ipv4 && 2271 irdma_ipv4_is_lpb(cm_node->loc_addr[0], cm_node->rem_addr[0])) || 2272 (!cm_node->ipv4 && 2273 irdma_ipv6_is_lpb(cm_node->loc_addr, cm_node->rem_addr))) { 2274 cm_node->do_lpb = true; 2275 arpindex = irdma_arp_table(iwdev->rf, cm_node->rem_addr, 2276 cm_node->ipv4, NULL, 2277 IRDMA_ARP_RESOLVE); 2278 } else { 2279 oldarpindex = irdma_arp_table(iwdev->rf, cm_node->rem_addr, 2280 cm_node->ipv4, NULL, 2281 IRDMA_ARP_RESOLVE); 2282 if (cm_node->ipv4) 2283 arpindex = irdma_addr_resolve_neigh(iwdev, 2284 cm_info->loc_addr[0], 2285 cm_info->rem_addr[0], 2286 oldarpindex); 2287 else if (IS_ENABLED(CONFIG_IPV6)) 2288 arpindex = irdma_addr_resolve_neigh_ipv6(iwdev, 2289 cm_info->loc_addr, 2290 cm_info->rem_addr, 2291 oldarpindex); 2292 else 2293 arpindex = -EINVAL; 2294 } 2295 2296 if (arpindex < 0) 2297 goto err; 2298 2299 ether_addr_copy(cm_node->rem_mac, 2300 iwdev->rf->arp_table[arpindex].mac_addr); 2301 irdma_add_hte_node(cm_core, cm_node); 2302 cm_core->stats_nodes_created++; 2303 return cm_node; 2304 2305 err: 2306 kfree(cm_node); 2307 2308 return NULL; 2309 } 2310 2311 static void irdma_destroy_connection(struct irdma_cm_node *cm_node) 2312 { 2313 struct irdma_cm_core *cm_core = cm_node->cm_core; 2314 struct irdma_qp *iwqp; 2315 struct irdma_cm_info nfo; 2316 2317 /* if the node is destroyed before connection was accelerated */ 2318 if (!cm_node->accelerated && cm_node->accept_pend) { 2319 ibdev_dbg(&cm_node->iwdev->ibdev, 2320 "CM: node destroyed before established\n"); 2321 atomic_dec(&cm_node->listener->pend_accepts_cnt); 2322 } 2323 if (cm_node->close_entry) 2324 irdma_handle_close_entry(cm_node, 0); 2325 if (cm_node->listener) { 2326 irdma_dec_refcnt_listen(cm_core, cm_node->listener, 0, true); 2327 } else { 2328 if (cm_node->apbvt_set) { 2329 irdma_del_apbvt(cm_node->iwdev, cm_node->apbvt_entry); 2330 cm_node->apbvt_set = 0; 2331 } 2332 irdma_get_addr_info(cm_node, &nfo); 2333 if (cm_node->qhash_set) { 2334 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id; 2335 irdma_manage_qhash(cm_node->iwdev, &nfo, 2336 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 2337 IRDMA_QHASH_MANAGE_TYPE_DELETE, NULL, 2338 false); 2339 cm_node->qhash_set = 0; 2340 } 2341 } 2342 2343 iwqp = cm_node->iwqp; 2344 if (iwqp) { 2345 cm_node->cm_id->rem_ref(cm_node->cm_id); 2346 cm_node->cm_id = NULL; 2347 iwqp->cm_id = NULL; 2348 irdma_qp_rem_ref(&iwqp->ibqp); 2349 cm_node->iwqp = NULL; 2350 } else if (cm_node->qhash_set) { 2351 irdma_get_addr_info(cm_node, &nfo); 2352 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id; 2353 irdma_manage_qhash(cm_node->iwdev, &nfo, 2354 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 2355 IRDMA_QHASH_MANAGE_TYPE_DELETE, NULL, false); 2356 cm_node->qhash_set = 0; 2357 } 2358 2359 cm_core->cm_free_ah(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 irdma_destroy_connection(cm_node); 2388 2389 kfree_rcu(cm_node, rcu_head); 2390 } 2391 2392 /** 2393 * irdma_handle_fin_pkt - FIN packet received 2394 * @cm_node: connection's node 2395 */ 2396 static void irdma_handle_fin_pkt(struct irdma_cm_node *cm_node) 2397 { 2398 switch (cm_node->state) { 2399 case IRDMA_CM_STATE_SYN_RCVD: 2400 case IRDMA_CM_STATE_SYN_SENT: 2401 case IRDMA_CM_STATE_ESTABLISHED: 2402 case IRDMA_CM_STATE_MPAREJ_RCVD: 2403 cm_node->tcp_cntxt.rcv_nxt++; 2404 irdma_cleanup_retrans_entry(cm_node); 2405 cm_node->state = IRDMA_CM_STATE_LAST_ACK; 2406 irdma_send_fin(cm_node); 2407 break; 2408 case IRDMA_CM_STATE_MPAREQ_SENT: 2409 irdma_create_event(cm_node, IRDMA_CM_EVENT_ABORTED); 2410 cm_node->tcp_cntxt.rcv_nxt++; 2411 irdma_cleanup_retrans_entry(cm_node); 2412 cm_node->state = IRDMA_CM_STATE_CLOSED; 2413 refcount_inc(&cm_node->refcnt); 2414 irdma_send_reset(cm_node); 2415 break; 2416 case IRDMA_CM_STATE_FIN_WAIT1: 2417 cm_node->tcp_cntxt.rcv_nxt++; 2418 irdma_cleanup_retrans_entry(cm_node); 2419 cm_node->state = IRDMA_CM_STATE_CLOSING; 2420 irdma_send_ack(cm_node); 2421 /* 2422 * Wait for ACK as this is simultaneous close. 2423 * After we receive ACK, do not send anything. 2424 * Just rm the node. 2425 */ 2426 break; 2427 case IRDMA_CM_STATE_FIN_WAIT2: 2428 cm_node->tcp_cntxt.rcv_nxt++; 2429 irdma_cleanup_retrans_entry(cm_node); 2430 cm_node->state = IRDMA_CM_STATE_TIME_WAIT; 2431 irdma_send_ack(cm_node); 2432 irdma_schedule_cm_timer(cm_node, NULL, IRDMA_TIMER_TYPE_CLOSE, 2433 1, 0); 2434 break; 2435 case IRDMA_CM_STATE_TIME_WAIT: 2436 cm_node->tcp_cntxt.rcv_nxt++; 2437 irdma_cleanup_retrans_entry(cm_node); 2438 cm_node->state = IRDMA_CM_STATE_CLOSED; 2439 irdma_rem_ref_cm_node(cm_node); 2440 break; 2441 case IRDMA_CM_STATE_OFFLOADED: 2442 default: 2443 ibdev_dbg(&cm_node->iwdev->ibdev, 2444 "CM: bad state node state = %d\n", cm_node->state); 2445 break; 2446 } 2447 } 2448 2449 /** 2450 * irdma_handle_rst_pkt - process received RST packet 2451 * @cm_node: connection's node 2452 * @rbuf: receive buffer 2453 */ 2454 static void irdma_handle_rst_pkt(struct irdma_cm_node *cm_node, 2455 struct irdma_puda_buf *rbuf) 2456 { 2457 ibdev_dbg(&cm_node->iwdev->ibdev, 2458 "CM: caller: %pS cm_node=%p state=%d rem_port=0x%04x loc_port=0x%04x rem_addr=%pI4 loc_addr=%pI4\n", 2459 __builtin_return_address(0), cm_node, cm_node->state, 2460 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr, 2461 cm_node->loc_addr); 2462 2463 irdma_cleanup_retrans_entry(cm_node); 2464 switch (cm_node->state) { 2465 case IRDMA_CM_STATE_SYN_SENT: 2466 case IRDMA_CM_STATE_MPAREQ_SENT: 2467 switch (cm_node->mpa_frame_rev) { 2468 case IETF_MPA_V2: 2469 /* Drop down to MPA_V1*/ 2470 cm_node->mpa_frame_rev = IETF_MPA_V1; 2471 /* send a syn and goto syn sent state */ 2472 cm_node->state = IRDMA_CM_STATE_SYN_SENT; 2473 if (irdma_send_syn(cm_node, 0)) 2474 irdma_active_open_err(cm_node, false); 2475 break; 2476 case IETF_MPA_V1: 2477 default: 2478 irdma_active_open_err(cm_node, false); 2479 break; 2480 } 2481 break; 2482 case IRDMA_CM_STATE_MPAREQ_RCVD: 2483 atomic_inc(&cm_node->passive_state); 2484 break; 2485 case IRDMA_CM_STATE_ESTABLISHED: 2486 case IRDMA_CM_STATE_SYN_RCVD: 2487 case IRDMA_CM_STATE_LISTENING: 2488 irdma_passive_open_err(cm_node, false); 2489 break; 2490 case IRDMA_CM_STATE_OFFLOADED: 2491 irdma_active_open_err(cm_node, false); 2492 break; 2493 case IRDMA_CM_STATE_CLOSED: 2494 break; 2495 case IRDMA_CM_STATE_FIN_WAIT2: 2496 case IRDMA_CM_STATE_FIN_WAIT1: 2497 case IRDMA_CM_STATE_LAST_ACK: 2498 case IRDMA_CM_STATE_TIME_WAIT: 2499 cm_node->state = IRDMA_CM_STATE_CLOSED; 2500 irdma_rem_ref_cm_node(cm_node); 2501 break; 2502 default: 2503 break; 2504 } 2505 } 2506 2507 /** 2508 * irdma_handle_rcv_mpa - Process a recv'd mpa buffer 2509 * @cm_node: connection's node 2510 * @rbuf: receive buffer 2511 */ 2512 static void irdma_handle_rcv_mpa(struct irdma_cm_node *cm_node, 2513 struct irdma_puda_buf *rbuf) 2514 { 2515 int err; 2516 int datasize = rbuf->datalen; 2517 u8 *dataloc = rbuf->data; 2518 2519 enum irdma_cm_event_type type = IRDMA_CM_EVENT_UNKNOWN; 2520 u32 res_type; 2521 2522 err = irdma_parse_mpa(cm_node, dataloc, &res_type, datasize); 2523 if (err) { 2524 if (cm_node->state == IRDMA_CM_STATE_MPAREQ_SENT) 2525 irdma_active_open_err(cm_node, true); 2526 else 2527 irdma_passive_open_err(cm_node, true); 2528 return; 2529 } 2530 2531 switch (cm_node->state) { 2532 case IRDMA_CM_STATE_ESTABLISHED: 2533 if (res_type == IRDMA_MPA_REQUEST_REJECT) 2534 ibdev_dbg(&cm_node->iwdev->ibdev, 2535 "CM: state for reject\n"); 2536 cm_node->state = IRDMA_CM_STATE_MPAREQ_RCVD; 2537 type = IRDMA_CM_EVENT_MPA_REQ; 2538 irdma_send_ack(cm_node); /* ACK received MPA request */ 2539 atomic_set(&cm_node->passive_state, 2540 IRDMA_PASSIVE_STATE_INDICATED); 2541 break; 2542 case IRDMA_CM_STATE_MPAREQ_SENT: 2543 irdma_cleanup_retrans_entry(cm_node); 2544 if (res_type == IRDMA_MPA_REQUEST_REJECT) { 2545 type = IRDMA_CM_EVENT_MPA_REJECT; 2546 cm_node->state = IRDMA_CM_STATE_MPAREJ_RCVD; 2547 } else { 2548 type = IRDMA_CM_EVENT_CONNECTED; 2549 cm_node->state = IRDMA_CM_STATE_OFFLOADED; 2550 } 2551 irdma_send_ack(cm_node); 2552 break; 2553 default: 2554 ibdev_dbg(&cm_node->iwdev->ibdev, 2555 "CM: wrong cm_node state =%d\n", cm_node->state); 2556 break; 2557 } 2558 irdma_create_event(cm_node, type); 2559 } 2560 2561 /** 2562 * irdma_check_syn - Check for error on received syn ack 2563 * @cm_node: connection's node 2564 * @tcph: pointer tcp header 2565 */ 2566 static int irdma_check_syn(struct irdma_cm_node *cm_node, struct tcphdr *tcph) 2567 { 2568 if (ntohl(tcph->ack_seq) != cm_node->tcp_cntxt.loc_seq_num) { 2569 irdma_active_open_err(cm_node, true); 2570 return 1; 2571 } 2572 2573 return 0; 2574 } 2575 2576 /** 2577 * irdma_check_seq - check seq numbers if OK 2578 * @cm_node: connection's node 2579 * @tcph: pointer tcp header 2580 */ 2581 static int irdma_check_seq(struct irdma_cm_node *cm_node, struct tcphdr *tcph) 2582 { 2583 u32 seq; 2584 u32 ack_seq; 2585 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num; 2586 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt; 2587 u32 rcv_wnd; 2588 int err = 0; 2589 2590 seq = ntohl(tcph->seq); 2591 ack_seq = ntohl(tcph->ack_seq); 2592 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd; 2593 if (ack_seq != loc_seq_num || 2594 !between(seq, rcv_nxt, (rcv_nxt + rcv_wnd))) 2595 err = -1; 2596 if (err) 2597 ibdev_dbg(&cm_node->iwdev->ibdev, 2598 "CM: seq number err\n"); 2599 2600 return err; 2601 } 2602 2603 void irdma_add_conn_est_qh(struct irdma_cm_node *cm_node) 2604 { 2605 struct irdma_cm_info nfo; 2606 2607 irdma_get_addr_info(cm_node, &nfo); 2608 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id; 2609 irdma_manage_qhash(cm_node->iwdev, &nfo, 2610 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 2611 IRDMA_QHASH_MANAGE_TYPE_ADD, 2612 cm_node, false); 2613 cm_node->qhash_set = true; 2614 } 2615 2616 /** 2617 * irdma_handle_syn_pkt - is for Passive node 2618 * @cm_node: connection's node 2619 * @rbuf: receive buffer 2620 */ 2621 static void irdma_handle_syn_pkt(struct irdma_cm_node *cm_node, 2622 struct irdma_puda_buf *rbuf) 2623 { 2624 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2625 int err; 2626 u32 inc_sequence; 2627 int optionsize; 2628 2629 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); 2630 inc_sequence = ntohl(tcph->seq); 2631 2632 switch (cm_node->state) { 2633 case IRDMA_CM_STATE_SYN_SENT: 2634 case IRDMA_CM_STATE_MPAREQ_SENT: 2635 /* Rcvd syn on active open connection */ 2636 irdma_active_open_err(cm_node, 1); 2637 break; 2638 case IRDMA_CM_STATE_LISTENING: 2639 /* Passive OPEN */ 2640 if (atomic_read(&cm_node->listener->pend_accepts_cnt) > 2641 cm_node->listener->backlog) { 2642 cm_node->cm_core->stats_backlog_drops++; 2643 irdma_passive_open_err(cm_node, false); 2644 break; 2645 } 2646 err = irdma_handle_tcp_options(cm_node, tcph, optionsize, 1); 2647 if (err) { 2648 irdma_passive_open_err(cm_node, false); 2649 /* drop pkt */ 2650 break; 2651 } 2652 err = cm_node->cm_core->cm_create_ah(cm_node, false); 2653 if (err) { 2654 irdma_passive_open_err(cm_node, false); 2655 /* drop pkt */ 2656 break; 2657 } 2658 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; 2659 cm_node->accept_pend = 1; 2660 atomic_inc(&cm_node->listener->pend_accepts_cnt); 2661 2662 cm_node->state = IRDMA_CM_STATE_SYN_RCVD; 2663 break; 2664 case IRDMA_CM_STATE_CLOSED: 2665 irdma_cleanup_retrans_entry(cm_node); 2666 refcount_inc(&cm_node->refcnt); 2667 irdma_send_reset(cm_node); 2668 break; 2669 case IRDMA_CM_STATE_OFFLOADED: 2670 case IRDMA_CM_STATE_ESTABLISHED: 2671 case IRDMA_CM_STATE_FIN_WAIT1: 2672 case IRDMA_CM_STATE_FIN_WAIT2: 2673 case IRDMA_CM_STATE_MPAREQ_RCVD: 2674 case IRDMA_CM_STATE_LAST_ACK: 2675 case IRDMA_CM_STATE_CLOSING: 2676 case IRDMA_CM_STATE_UNKNOWN: 2677 default: 2678 break; 2679 } 2680 } 2681 2682 /** 2683 * irdma_handle_synack_pkt - Process SYN+ACK packet (active side) 2684 * @cm_node: connection's node 2685 * @rbuf: receive buffer 2686 */ 2687 static void irdma_handle_synack_pkt(struct irdma_cm_node *cm_node, 2688 struct irdma_puda_buf *rbuf) 2689 { 2690 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2691 int err; 2692 u32 inc_sequence; 2693 int optionsize; 2694 2695 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); 2696 inc_sequence = ntohl(tcph->seq); 2697 switch (cm_node->state) { 2698 case IRDMA_CM_STATE_SYN_SENT: 2699 irdma_cleanup_retrans_entry(cm_node); 2700 /* active open */ 2701 if (irdma_check_syn(cm_node, tcph)) { 2702 ibdev_dbg(&cm_node->iwdev->ibdev, 2703 "CM: check syn fail\n"); 2704 return; 2705 } 2706 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); 2707 /* setup options */ 2708 err = irdma_handle_tcp_options(cm_node, tcph, optionsize, 0); 2709 if (err) { 2710 ibdev_dbg(&cm_node->iwdev->ibdev, 2711 "CM: cm_node=%p tcp_options failed\n", 2712 cm_node); 2713 break; 2714 } 2715 irdma_cleanup_retrans_entry(cm_node); 2716 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; 2717 irdma_send_ack(cm_node); /* ACK for the syn_ack */ 2718 err = irdma_send_mpa_request(cm_node); 2719 if (err) { 2720 ibdev_dbg(&cm_node->iwdev->ibdev, 2721 "CM: cm_node=%p irdma_send_mpa_request failed\n", 2722 cm_node); 2723 break; 2724 } 2725 cm_node->state = IRDMA_CM_STATE_MPAREQ_SENT; 2726 break; 2727 case IRDMA_CM_STATE_MPAREQ_RCVD: 2728 irdma_passive_open_err(cm_node, true); 2729 break; 2730 case IRDMA_CM_STATE_LISTENING: 2731 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq); 2732 irdma_cleanup_retrans_entry(cm_node); 2733 cm_node->state = IRDMA_CM_STATE_CLOSED; 2734 irdma_send_reset(cm_node); 2735 break; 2736 case IRDMA_CM_STATE_CLOSED: 2737 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq); 2738 irdma_cleanup_retrans_entry(cm_node); 2739 refcount_inc(&cm_node->refcnt); 2740 irdma_send_reset(cm_node); 2741 break; 2742 case IRDMA_CM_STATE_ESTABLISHED: 2743 case IRDMA_CM_STATE_FIN_WAIT1: 2744 case IRDMA_CM_STATE_FIN_WAIT2: 2745 case IRDMA_CM_STATE_LAST_ACK: 2746 case IRDMA_CM_STATE_OFFLOADED: 2747 case IRDMA_CM_STATE_CLOSING: 2748 case IRDMA_CM_STATE_UNKNOWN: 2749 case IRDMA_CM_STATE_MPAREQ_SENT: 2750 default: 2751 break; 2752 } 2753 } 2754 2755 /** 2756 * irdma_handle_ack_pkt - process packet with ACK 2757 * @cm_node: connection's node 2758 * @rbuf: receive buffer 2759 */ 2760 static int irdma_handle_ack_pkt(struct irdma_cm_node *cm_node, 2761 struct irdma_puda_buf *rbuf) 2762 { 2763 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2764 u32 inc_sequence; 2765 int ret; 2766 int optionsize; 2767 u32 datasize = rbuf->datalen; 2768 2769 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); 2770 2771 if (irdma_check_seq(cm_node, tcph)) 2772 return -EINVAL; 2773 2774 inc_sequence = ntohl(tcph->seq); 2775 switch (cm_node->state) { 2776 case IRDMA_CM_STATE_SYN_RCVD: 2777 irdma_cleanup_retrans_entry(cm_node); 2778 ret = irdma_handle_tcp_options(cm_node, tcph, optionsize, 1); 2779 if (ret) 2780 return ret; 2781 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); 2782 cm_node->state = IRDMA_CM_STATE_ESTABLISHED; 2783 if (datasize) { 2784 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; 2785 irdma_handle_rcv_mpa(cm_node, rbuf); 2786 } 2787 break; 2788 case IRDMA_CM_STATE_ESTABLISHED: 2789 irdma_cleanup_retrans_entry(cm_node); 2790 if (datasize) { 2791 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; 2792 irdma_handle_rcv_mpa(cm_node, rbuf); 2793 } 2794 break; 2795 case IRDMA_CM_STATE_MPAREQ_SENT: 2796 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); 2797 if (datasize) { 2798 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; 2799 cm_node->ack_rcvd = false; 2800 irdma_handle_rcv_mpa(cm_node, rbuf); 2801 } else { 2802 cm_node->ack_rcvd = true; 2803 } 2804 break; 2805 case IRDMA_CM_STATE_LISTENING: 2806 irdma_cleanup_retrans_entry(cm_node); 2807 cm_node->state = IRDMA_CM_STATE_CLOSED; 2808 irdma_send_reset(cm_node); 2809 break; 2810 case IRDMA_CM_STATE_CLOSED: 2811 irdma_cleanup_retrans_entry(cm_node); 2812 refcount_inc(&cm_node->refcnt); 2813 irdma_send_reset(cm_node); 2814 break; 2815 case IRDMA_CM_STATE_LAST_ACK: 2816 case IRDMA_CM_STATE_CLOSING: 2817 irdma_cleanup_retrans_entry(cm_node); 2818 cm_node->state = IRDMA_CM_STATE_CLOSED; 2819 irdma_rem_ref_cm_node(cm_node); 2820 break; 2821 case IRDMA_CM_STATE_FIN_WAIT1: 2822 irdma_cleanup_retrans_entry(cm_node); 2823 cm_node->state = IRDMA_CM_STATE_FIN_WAIT2; 2824 break; 2825 case IRDMA_CM_STATE_SYN_SENT: 2826 case IRDMA_CM_STATE_FIN_WAIT2: 2827 case IRDMA_CM_STATE_OFFLOADED: 2828 case IRDMA_CM_STATE_MPAREQ_RCVD: 2829 case IRDMA_CM_STATE_UNKNOWN: 2830 default: 2831 irdma_cleanup_retrans_entry(cm_node); 2832 break; 2833 } 2834 2835 return 0; 2836 } 2837 2838 /** 2839 * irdma_process_pkt - process cm packet 2840 * @cm_node: connection's node 2841 * @rbuf: receive buffer 2842 */ 2843 static void irdma_process_pkt(struct irdma_cm_node *cm_node, 2844 struct irdma_puda_buf *rbuf) 2845 { 2846 enum irdma_tcpip_pkt_type pkt_type = IRDMA_PKT_TYPE_UNKNOWN; 2847 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2848 u32 fin_set = 0; 2849 int err; 2850 2851 if (tcph->rst) { 2852 pkt_type = IRDMA_PKT_TYPE_RST; 2853 } else if (tcph->syn) { 2854 pkt_type = IRDMA_PKT_TYPE_SYN; 2855 if (tcph->ack) 2856 pkt_type = IRDMA_PKT_TYPE_SYNACK; 2857 } else if (tcph->ack) { 2858 pkt_type = IRDMA_PKT_TYPE_ACK; 2859 } 2860 if (tcph->fin) 2861 fin_set = 1; 2862 2863 switch (pkt_type) { 2864 case IRDMA_PKT_TYPE_SYN: 2865 irdma_handle_syn_pkt(cm_node, rbuf); 2866 break; 2867 case IRDMA_PKT_TYPE_SYNACK: 2868 irdma_handle_synack_pkt(cm_node, rbuf); 2869 break; 2870 case IRDMA_PKT_TYPE_ACK: 2871 err = irdma_handle_ack_pkt(cm_node, rbuf); 2872 if (fin_set && !err) 2873 irdma_handle_fin_pkt(cm_node); 2874 break; 2875 case IRDMA_PKT_TYPE_RST: 2876 irdma_handle_rst_pkt(cm_node, rbuf); 2877 break; 2878 default: 2879 if (fin_set && 2880 (!irdma_check_seq(cm_node, (struct tcphdr *)rbuf->tcph))) 2881 irdma_handle_fin_pkt(cm_node); 2882 break; 2883 } 2884 } 2885 2886 /** 2887 * irdma_make_listen_node - create a listen node with params 2888 * @cm_core: cm's core 2889 * @iwdev: iwarp device structure 2890 * @cm_info: quad info for connection 2891 */ 2892 static struct irdma_cm_listener * 2893 irdma_make_listen_node(struct irdma_cm_core *cm_core, 2894 struct irdma_device *iwdev, 2895 struct irdma_cm_info *cm_info) 2896 { 2897 struct irdma_cm_listener *listener; 2898 unsigned long flags; 2899 2900 /* cannot have multiple matching listeners */ 2901 listener = irdma_find_listener(cm_core, cm_info->loc_addr, 2902 cm_info->loc_port, cm_info->vlan_id, 2903 IRDMA_CM_LISTENER_EITHER_STATE); 2904 if (listener && 2905 listener->listener_state == IRDMA_CM_LISTENER_ACTIVE_STATE) { 2906 refcount_dec(&listener->refcnt); 2907 return NULL; 2908 } 2909 2910 if (!listener) { 2911 /* create a CM listen node 2912 * 1/2 node to compare incoming traffic to 2913 */ 2914 listener = kzalloc(sizeof(*listener), GFP_KERNEL); 2915 if (!listener) 2916 return NULL; 2917 cm_core->stats_listen_nodes_created++; 2918 memcpy(listener->loc_addr, cm_info->loc_addr, 2919 sizeof(listener->loc_addr)); 2920 listener->loc_port = cm_info->loc_port; 2921 2922 INIT_LIST_HEAD(&listener->child_listen_list); 2923 2924 refcount_set(&listener->refcnt, 1); 2925 } else { 2926 listener->reused_node = 1; 2927 } 2928 2929 listener->cm_id = cm_info->cm_id; 2930 listener->ipv4 = cm_info->ipv4; 2931 listener->vlan_id = cm_info->vlan_id; 2932 atomic_set(&listener->pend_accepts_cnt, 0); 2933 listener->cm_core = cm_core; 2934 listener->iwdev = iwdev; 2935 2936 listener->backlog = cm_info->backlog; 2937 listener->listener_state = IRDMA_CM_LISTENER_ACTIVE_STATE; 2938 2939 if (!listener->reused_node) { 2940 spin_lock_irqsave(&cm_core->listen_list_lock, flags); 2941 list_add(&listener->list, &cm_core->listen_list); 2942 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); 2943 } 2944 2945 return listener; 2946 } 2947 2948 /** 2949 * irdma_create_cm_node - make a connection node with params 2950 * @cm_core: cm's core 2951 * @iwdev: iwarp device structure 2952 * @conn_param: connection parameters 2953 * @cm_info: quad info for connection 2954 * @caller_cm_node: pointer to cm_node structure to return 2955 */ 2956 static int irdma_create_cm_node(struct irdma_cm_core *cm_core, 2957 struct irdma_device *iwdev, 2958 struct iw_cm_conn_param *conn_param, 2959 struct irdma_cm_info *cm_info, 2960 struct irdma_cm_node **caller_cm_node) 2961 { 2962 struct irdma_cm_node *cm_node; 2963 u16 private_data_len = conn_param->private_data_len; 2964 const void *private_data = conn_param->private_data; 2965 2966 /* create a CM connection node */ 2967 cm_node = irdma_make_cm_node(cm_core, iwdev, cm_info, NULL); 2968 if (!cm_node) 2969 return -ENOMEM; 2970 2971 /* set our node side to client (active) side */ 2972 cm_node->tcp_cntxt.client = 1; 2973 cm_node->tcp_cntxt.rcv_wscale = IRDMA_CM_DEFAULT_RCV_WND_SCALE; 2974 2975 irdma_record_ird_ord(cm_node, conn_param->ird, conn_param->ord); 2976 2977 cm_node->pdata.size = private_data_len; 2978 cm_node->pdata.addr = cm_node->pdata_buf; 2979 2980 memcpy(cm_node->pdata_buf, private_data, private_data_len); 2981 *caller_cm_node = cm_node; 2982 2983 return 0; 2984 } 2985 2986 /** 2987 * irdma_cm_reject - reject and teardown a connection 2988 * @cm_node: connection's node 2989 * @pdata: ptr to private data for reject 2990 * @plen: size of private data 2991 */ 2992 static int irdma_cm_reject(struct irdma_cm_node *cm_node, const void *pdata, 2993 u8 plen) 2994 { 2995 int ret; 2996 int passive_state; 2997 2998 if (cm_node->tcp_cntxt.client) 2999 return 0; 3000 3001 irdma_cleanup_retrans_entry(cm_node); 3002 3003 passive_state = atomic_add_return(1, &cm_node->passive_state); 3004 if (passive_state == IRDMA_SEND_RESET_EVENT) { 3005 cm_node->state = IRDMA_CM_STATE_CLOSED; 3006 irdma_rem_ref_cm_node(cm_node); 3007 return 0; 3008 } 3009 3010 if (cm_node->state == IRDMA_CM_STATE_LISTENER_DESTROYED) { 3011 irdma_rem_ref_cm_node(cm_node); 3012 return 0; 3013 } 3014 3015 ret = irdma_send_mpa_reject(cm_node, pdata, plen); 3016 if (!ret) 3017 return 0; 3018 3019 cm_node->state = IRDMA_CM_STATE_CLOSED; 3020 if (irdma_send_reset(cm_node)) 3021 ibdev_dbg(&cm_node->iwdev->ibdev, 3022 "CM: send reset failed\n"); 3023 3024 return ret; 3025 } 3026 3027 /** 3028 * irdma_cm_close - close of cm connection 3029 * @cm_node: connection's node 3030 */ 3031 static int irdma_cm_close(struct irdma_cm_node *cm_node) 3032 { 3033 switch (cm_node->state) { 3034 case IRDMA_CM_STATE_SYN_RCVD: 3035 case IRDMA_CM_STATE_SYN_SENT: 3036 case IRDMA_CM_STATE_ONE_SIDE_ESTABLISHED: 3037 case IRDMA_CM_STATE_ESTABLISHED: 3038 case IRDMA_CM_STATE_ACCEPTING: 3039 case IRDMA_CM_STATE_MPAREQ_SENT: 3040 case IRDMA_CM_STATE_MPAREQ_RCVD: 3041 irdma_cleanup_retrans_entry(cm_node); 3042 irdma_send_reset(cm_node); 3043 break; 3044 case IRDMA_CM_STATE_CLOSE_WAIT: 3045 cm_node->state = IRDMA_CM_STATE_LAST_ACK; 3046 irdma_send_fin(cm_node); 3047 break; 3048 case IRDMA_CM_STATE_FIN_WAIT1: 3049 case IRDMA_CM_STATE_FIN_WAIT2: 3050 case IRDMA_CM_STATE_LAST_ACK: 3051 case IRDMA_CM_STATE_TIME_WAIT: 3052 case IRDMA_CM_STATE_CLOSING: 3053 return -EINVAL; 3054 case IRDMA_CM_STATE_LISTENING: 3055 irdma_cleanup_retrans_entry(cm_node); 3056 irdma_send_reset(cm_node); 3057 break; 3058 case IRDMA_CM_STATE_MPAREJ_RCVD: 3059 case IRDMA_CM_STATE_UNKNOWN: 3060 case IRDMA_CM_STATE_INITED: 3061 case IRDMA_CM_STATE_CLOSED: 3062 case IRDMA_CM_STATE_LISTENER_DESTROYED: 3063 irdma_rem_ref_cm_node(cm_node); 3064 break; 3065 case IRDMA_CM_STATE_OFFLOADED: 3066 if (cm_node->send_entry) 3067 ibdev_dbg(&cm_node->iwdev->ibdev, 3068 "CM: CM send_entry in OFFLOADED state\n"); 3069 irdma_rem_ref_cm_node(cm_node); 3070 break; 3071 } 3072 3073 return 0; 3074 } 3075 3076 /** 3077 * irdma_receive_ilq - recv an ETHERNET packet, and process it 3078 * through CM 3079 * @vsi: VSI structure of dev 3080 * @rbuf: receive buffer 3081 */ 3082 void irdma_receive_ilq(struct irdma_sc_vsi *vsi, struct irdma_puda_buf *rbuf) 3083 { 3084 struct irdma_cm_node *cm_node; 3085 struct irdma_cm_listener *listener; 3086 struct iphdr *iph; 3087 struct ipv6hdr *ip6h; 3088 struct tcphdr *tcph; 3089 struct irdma_cm_info cm_info = {}; 3090 struct irdma_device *iwdev = vsi->back_vsi; 3091 struct irdma_cm_core *cm_core = &iwdev->cm_core; 3092 struct vlan_ethhdr *ethh; 3093 u16 vtag; 3094 3095 /* if vlan, then maclen = 18 else 14 */ 3096 iph = (struct iphdr *)rbuf->iph; 3097 print_hex_dump_debug("ILQ: RECEIVE ILQ BUFFER", DUMP_PREFIX_OFFSET, 3098 16, 8, rbuf->mem.va, rbuf->totallen, false); 3099 if (iwdev->rf->sc_dev.hw_attrs.uk_attrs.hw_rev >= IRDMA_GEN_2) { 3100 if (rbuf->vlan_valid) { 3101 vtag = rbuf->vlan_id; 3102 cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >> 3103 VLAN_PRIO_SHIFT; 3104 cm_info.vlan_id = vtag & VLAN_VID_MASK; 3105 } else { 3106 cm_info.vlan_id = 0xFFFF; 3107 } 3108 } else { 3109 ethh = rbuf->mem.va; 3110 3111 if (ethh->h_vlan_proto == htons(ETH_P_8021Q)) { 3112 vtag = ntohs(ethh->h_vlan_TCI); 3113 cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >> 3114 VLAN_PRIO_SHIFT; 3115 cm_info.vlan_id = vtag & VLAN_VID_MASK; 3116 ibdev_dbg(&cm_core->iwdev->ibdev, 3117 "CM: vlan_id=%d\n", cm_info.vlan_id); 3118 } else { 3119 cm_info.vlan_id = 0xFFFF; 3120 } 3121 } 3122 tcph = (struct tcphdr *)rbuf->tcph; 3123 3124 if (rbuf->ipv4) { 3125 cm_info.loc_addr[0] = ntohl(iph->daddr); 3126 cm_info.rem_addr[0] = ntohl(iph->saddr); 3127 cm_info.ipv4 = true; 3128 cm_info.tos = iph->tos; 3129 } else { 3130 ip6h = (struct ipv6hdr *)rbuf->iph; 3131 irdma_copy_ip_ntohl(cm_info.loc_addr, 3132 ip6h->daddr.in6_u.u6_addr32); 3133 irdma_copy_ip_ntohl(cm_info.rem_addr, 3134 ip6h->saddr.in6_u.u6_addr32); 3135 cm_info.ipv4 = false; 3136 cm_info.tos = (ip6h->priority << 4) | (ip6h->flow_lbl[0] >> 4); 3137 } 3138 cm_info.loc_port = ntohs(tcph->dest); 3139 cm_info.rem_port = ntohs(tcph->source); 3140 cm_node = irdma_find_node(cm_core, cm_info.rem_port, cm_info.rem_addr, 3141 cm_info.loc_port, cm_info.loc_addr, cm_info.vlan_id); 3142 3143 if (!cm_node) { 3144 /* Only type of packet accepted are for the 3145 * PASSIVE open (syn only) 3146 */ 3147 if (!tcph->syn || tcph->ack) 3148 return; 3149 3150 listener = irdma_find_listener(cm_core, 3151 cm_info.loc_addr, 3152 cm_info.loc_port, 3153 cm_info.vlan_id, 3154 IRDMA_CM_LISTENER_ACTIVE_STATE); 3155 if (!listener) { 3156 cm_info.cm_id = NULL; 3157 ibdev_dbg(&cm_core->iwdev->ibdev, 3158 "CM: no listener found\n"); 3159 return; 3160 } 3161 3162 cm_info.cm_id = listener->cm_id; 3163 cm_node = irdma_make_cm_node(cm_core, iwdev, &cm_info, 3164 listener); 3165 if (!cm_node) { 3166 ibdev_dbg(&cm_core->iwdev->ibdev, 3167 "CM: allocate node failed\n"); 3168 refcount_dec(&listener->refcnt); 3169 return; 3170 } 3171 3172 if (!tcph->rst && !tcph->fin) { 3173 cm_node->state = IRDMA_CM_STATE_LISTENING; 3174 } else { 3175 irdma_rem_ref_cm_node(cm_node); 3176 return; 3177 } 3178 3179 refcount_inc(&cm_node->refcnt); 3180 } else if (cm_node->state == IRDMA_CM_STATE_OFFLOADED) { 3181 irdma_rem_ref_cm_node(cm_node); 3182 return; 3183 } 3184 3185 irdma_process_pkt(cm_node, rbuf); 3186 irdma_rem_ref_cm_node(cm_node); 3187 } 3188 3189 static int irdma_add_qh(struct irdma_cm_node *cm_node, bool active) 3190 { 3191 if (!active) 3192 irdma_add_conn_est_qh(cm_node); 3193 return 0; 3194 } 3195 3196 static void irdma_cm_free_ah_nop(struct irdma_cm_node *cm_node) 3197 { 3198 } 3199 3200 /** 3201 * irdma_setup_cm_core - setup top level instance of a cm core 3202 * @iwdev: iwarp device structure 3203 * @rdma_ver: HW version 3204 */ 3205 int irdma_setup_cm_core(struct irdma_device *iwdev, 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 -ENOMEM; 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 if (!cm_core) 3248 return; 3249 3250 del_timer_sync(&cm_core->tcp_timer); 3251 3252 destroy_workqueue(cm_core->event_wq); 3253 cm_core->dev->ws_reset(&cm_core->iwdev->vsi); 3254 } 3255 3256 /** 3257 * irdma_init_tcp_ctx - setup qp context 3258 * @cm_node: connection's node 3259 * @tcp_info: offload info for tcp 3260 * @iwqp: associate qp for the connection 3261 */ 3262 static void irdma_init_tcp_ctx(struct irdma_cm_node *cm_node, 3263 struct irdma_tcp_offload_info *tcp_info, 3264 struct irdma_qp *iwqp) 3265 { 3266 tcp_info->ipv4 = cm_node->ipv4; 3267 tcp_info->drop_ooo_seg = !iwqp->iwdev->iw_ooo; 3268 tcp_info->wscale = true; 3269 tcp_info->ignore_tcp_opt = true; 3270 tcp_info->ignore_tcp_uns_opt = true; 3271 tcp_info->no_nagle = false; 3272 3273 tcp_info->ttl = IRDMA_DEFAULT_TTL; 3274 tcp_info->rtt_var = IRDMA_DEFAULT_RTT_VAR; 3275 tcp_info->ss_thresh = IRDMA_DEFAULT_SS_THRESH; 3276 tcp_info->rexmit_thresh = IRDMA_DEFAULT_REXMIT_THRESH; 3277 3278 tcp_info->tcp_state = IRDMA_TCP_STATE_ESTABLISHED; 3279 tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale; 3280 tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale; 3281 3282 tcp_info->snd_nxt = cm_node->tcp_cntxt.loc_seq_num; 3283 tcp_info->snd_wnd = cm_node->tcp_cntxt.snd_wnd; 3284 tcp_info->rcv_nxt = cm_node->tcp_cntxt.rcv_nxt; 3285 tcp_info->snd_max = cm_node->tcp_cntxt.loc_seq_num; 3286 3287 tcp_info->snd_una = cm_node->tcp_cntxt.loc_seq_num; 3288 tcp_info->cwnd = 2 * cm_node->tcp_cntxt.mss; 3289 tcp_info->snd_wl1 = cm_node->tcp_cntxt.rcv_nxt; 3290 tcp_info->snd_wl2 = cm_node->tcp_cntxt.loc_seq_num; 3291 tcp_info->max_snd_window = cm_node->tcp_cntxt.max_snd_wnd; 3292 tcp_info->rcv_wnd = cm_node->tcp_cntxt.rcv_wnd 3293 << cm_node->tcp_cntxt.rcv_wscale; 3294 3295 tcp_info->flow_label = 0; 3296 tcp_info->snd_mss = (u32)cm_node->tcp_cntxt.mss; 3297 tcp_info->tos = cm_node->tos; 3298 if (cm_node->vlan_id < VLAN_N_VID) { 3299 tcp_info->insert_vlan_tag = true; 3300 tcp_info->vlan_tag = cm_node->vlan_id; 3301 tcp_info->vlan_tag |= cm_node->user_pri << VLAN_PRIO_SHIFT; 3302 } 3303 if (cm_node->ipv4) { 3304 tcp_info->src_port = cm_node->loc_port; 3305 tcp_info->dst_port = cm_node->rem_port; 3306 3307 tcp_info->dest_ip_addr[3] = cm_node->rem_addr[0]; 3308 tcp_info->local_ipaddr[3] = cm_node->loc_addr[0]; 3309 tcp_info->arp_idx = (u16)irdma_arp_table(iwqp->iwdev->rf, 3310 &tcp_info->dest_ip_addr[3], 3311 true, NULL, 3312 IRDMA_ARP_RESOLVE); 3313 } else { 3314 tcp_info->src_port = cm_node->loc_port; 3315 tcp_info->dst_port = cm_node->rem_port; 3316 memcpy(tcp_info->dest_ip_addr, cm_node->rem_addr, 3317 sizeof(tcp_info->dest_ip_addr)); 3318 memcpy(tcp_info->local_ipaddr, cm_node->loc_addr, 3319 sizeof(tcp_info->local_ipaddr)); 3320 3321 tcp_info->arp_idx = (u16)irdma_arp_table(iwqp->iwdev->rf, 3322 &tcp_info->dest_ip_addr[0], 3323 false, NULL, 3324 IRDMA_ARP_RESOLVE); 3325 } 3326 } 3327 3328 /** 3329 * irdma_cm_init_tsa_conn - setup qp for RTS 3330 * @iwqp: associate qp for the connection 3331 * @cm_node: connection's node 3332 */ 3333 static void irdma_cm_init_tsa_conn(struct irdma_qp *iwqp, 3334 struct irdma_cm_node *cm_node) 3335 { 3336 struct irdma_iwarp_offload_info *iwarp_info; 3337 struct irdma_qp_host_ctx_info *ctx_info; 3338 3339 iwarp_info = &iwqp->iwarp_info; 3340 ctx_info = &iwqp->ctx_info; 3341 3342 ctx_info->tcp_info = &iwqp->tcp_info; 3343 ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id; 3344 ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id; 3345 3346 iwarp_info->ord_size = cm_node->ord_size; 3347 iwarp_info->ird_size = cm_node->ird_size; 3348 iwarp_info->rd_en = true; 3349 iwarp_info->rdmap_ver = 1; 3350 iwarp_info->ddp_ver = 1; 3351 iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id; 3352 3353 ctx_info->tcp_info_valid = true; 3354 ctx_info->iwarp_info_valid = true; 3355 ctx_info->user_pri = cm_node->user_pri; 3356 3357 irdma_init_tcp_ctx(cm_node, &iwqp->tcp_info, iwqp); 3358 if (cm_node->snd_mark_en) { 3359 iwarp_info->snd_mark_en = true; 3360 iwarp_info->snd_mark_offset = (iwqp->tcp_info.snd_nxt & SNDMARKER_SEQNMASK) + 3361 cm_node->lsmm_size; 3362 } 3363 3364 cm_node->state = IRDMA_CM_STATE_OFFLOADED; 3365 iwqp->tcp_info.tcp_state = IRDMA_TCP_STATE_ESTABLISHED; 3366 iwqp->tcp_info.src_mac_addr_idx = iwqp->iwdev->mac_ip_table_idx; 3367 3368 if (cm_node->rcv_mark_en) { 3369 iwarp_info->rcv_mark_en = true; 3370 iwarp_info->align_hdrs = true; 3371 } 3372 3373 irdma_sc_qp_setctx(&iwqp->sc_qp, iwqp->host_ctx.va, ctx_info); 3374 3375 /* once tcp_info is set, no need to do it again */ 3376 ctx_info->tcp_info_valid = false; 3377 ctx_info->iwarp_info_valid = false; 3378 } 3379 3380 /** 3381 * irdma_cm_disconn - when a connection is being closed 3382 * @iwqp: associated qp for the connection 3383 */ 3384 void irdma_cm_disconn(struct irdma_qp *iwqp) 3385 { 3386 struct irdma_device *iwdev = iwqp->iwdev; 3387 struct disconn_work *work; 3388 unsigned long flags; 3389 3390 work = kzalloc(sizeof(*work), GFP_ATOMIC); 3391 if (!work) 3392 return; 3393 3394 spin_lock_irqsave(&iwdev->rf->qptable_lock, flags); 3395 if (!iwdev->rf->qp_table[iwqp->ibqp.qp_num]) { 3396 spin_unlock_irqrestore(&iwdev->rf->qptable_lock, flags); 3397 ibdev_dbg(&iwdev->ibdev, 3398 "CM: qp_id %d is already freed\n", 3399 iwqp->ibqp.qp_num); 3400 kfree(work); 3401 return; 3402 } 3403 irdma_qp_add_ref(&iwqp->ibqp); 3404 spin_unlock_irqrestore(&iwdev->rf->qptable_lock, flags); 3405 3406 work->iwqp = iwqp; 3407 INIT_WORK(&work->work, irdma_disconnect_worker); 3408 queue_work(iwdev->cleanup_wq, &work->work); 3409 } 3410 3411 /** 3412 * irdma_qp_disconnect - free qp and close cm 3413 * @iwqp: associate qp for the connection 3414 */ 3415 static void irdma_qp_disconnect(struct irdma_qp *iwqp) 3416 { 3417 struct irdma_device *iwdev = iwqp->iwdev; 3418 3419 iwqp->active_conn = 0; 3420 /* close the CM node down if it is still active */ 3421 ibdev_dbg(&iwdev->ibdev, "CM: Call close API\n"); 3422 irdma_cm_close(iwqp->cm_node); 3423 } 3424 3425 /** 3426 * irdma_cm_disconn_true - called by worker thread to disconnect qp 3427 * @iwqp: associate qp for the connection 3428 */ 3429 static void irdma_cm_disconn_true(struct irdma_qp *iwqp) 3430 { 3431 struct iw_cm_id *cm_id; 3432 struct irdma_device *iwdev; 3433 struct irdma_sc_qp *qp = &iwqp->sc_qp; 3434 u16 last_ae; 3435 u8 original_hw_tcp_state; 3436 u8 original_ibqp_state; 3437 int disconn_status = 0; 3438 int issue_disconn = 0; 3439 int issue_close = 0; 3440 int issue_flush = 0; 3441 unsigned long flags; 3442 int err; 3443 3444 iwdev = iwqp->iwdev; 3445 spin_lock_irqsave(&iwqp->lock, flags); 3446 if (rdma_protocol_roce(&iwdev->ibdev, 1)) { 3447 struct ib_qp_attr attr; 3448 3449 if (iwqp->flush_issued || iwqp->sc_qp.qp_uk.destroy_pending) { 3450 spin_unlock_irqrestore(&iwqp->lock, flags); 3451 return; 3452 } 3453 3454 spin_unlock_irqrestore(&iwqp->lock, flags); 3455 3456 attr.qp_state = IB_QPS_ERR; 3457 irdma_modify_qp_roce(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); 3458 irdma_ib_qp_event(iwqp, qp->event_type); 3459 return; 3460 } 3461 3462 cm_id = iwqp->cm_id; 3463 original_hw_tcp_state = iwqp->hw_tcp_state; 3464 original_ibqp_state = iwqp->ibqp_state; 3465 last_ae = iwqp->last_aeq; 3466 3467 if (qp->term_flags) { 3468 issue_disconn = 1; 3469 issue_close = 1; 3470 iwqp->cm_id = NULL; 3471 irdma_terminate_del_timer(qp); 3472 if (!iwqp->flush_issued) { 3473 iwqp->flush_issued = 1; 3474 issue_flush = 1; 3475 } 3476 } else if ((original_hw_tcp_state == IRDMA_TCP_STATE_CLOSE_WAIT) || 3477 ((original_ibqp_state == IB_QPS_RTS) && 3478 (last_ae == IRDMA_AE_LLP_CONNECTION_RESET))) { 3479 issue_disconn = 1; 3480 if (last_ae == IRDMA_AE_LLP_CONNECTION_RESET) 3481 disconn_status = -ECONNRESET; 3482 } 3483 3484 if (original_hw_tcp_state == IRDMA_TCP_STATE_CLOSED || 3485 original_hw_tcp_state == IRDMA_TCP_STATE_TIME_WAIT || 3486 last_ae == IRDMA_AE_RDMAP_ROE_BAD_LLP_CLOSE || 3487 last_ae == IRDMA_AE_BAD_CLOSE || 3488 last_ae == IRDMA_AE_LLP_CONNECTION_RESET || iwdev->rf->reset || !cm_id) { 3489 issue_close = 1; 3490 iwqp->cm_id = NULL; 3491 qp->term_flags = 0; 3492 if (!iwqp->flush_issued) { 3493 iwqp->flush_issued = 1; 3494 issue_flush = 1; 3495 } 3496 } 3497 3498 spin_unlock_irqrestore(&iwqp->lock, flags); 3499 if (issue_flush && !iwqp->sc_qp.qp_uk.destroy_pending) { 3500 irdma_flush_wqes(iwqp, IRDMA_FLUSH_SQ | IRDMA_FLUSH_RQ | 3501 IRDMA_FLUSH_WAIT); 3502 3503 if (qp->term_flags) 3504 irdma_ib_qp_event(iwqp, qp->event_type); 3505 } 3506 3507 if (!cm_id || !cm_id->event_handler) 3508 return; 3509 3510 spin_lock_irqsave(&iwdev->cm_core.ht_lock, flags); 3511 if (!iwqp->cm_node) { 3512 spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags); 3513 return; 3514 } 3515 refcount_inc(&iwqp->cm_node->refcnt); 3516 3517 spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags); 3518 3519 if (issue_disconn) { 3520 err = irdma_send_cm_event(iwqp->cm_node, cm_id, 3521 IW_CM_EVENT_DISCONNECT, 3522 disconn_status); 3523 if (err) 3524 ibdev_dbg(&iwdev->ibdev, 3525 "CM: disconnect event failed: - cm_id = %p\n", 3526 cm_id); 3527 } 3528 if (issue_close) { 3529 cm_id->provider_data = iwqp; 3530 err = irdma_send_cm_event(iwqp->cm_node, cm_id, 3531 IW_CM_EVENT_CLOSE, 0); 3532 if (err) 3533 ibdev_dbg(&iwdev->ibdev, 3534 "CM: close event failed: - cm_id = %p\n", 3535 cm_id); 3536 irdma_qp_disconnect(iwqp); 3537 } 3538 irdma_rem_ref_cm_node(iwqp->cm_node); 3539 } 3540 3541 /** 3542 * irdma_disconnect_worker - worker for connection close 3543 * @work: points or disconn structure 3544 */ 3545 static void irdma_disconnect_worker(struct work_struct *work) 3546 { 3547 struct disconn_work *dwork = container_of(work, struct disconn_work, work); 3548 struct irdma_qp *iwqp = dwork->iwqp; 3549 3550 kfree(dwork); 3551 irdma_cm_disconn_true(iwqp); 3552 irdma_qp_rem_ref(&iwqp->ibqp); 3553 } 3554 3555 /** 3556 * irdma_free_lsmm_rsrc - free lsmm memory and deregister 3557 * @iwqp: associate qp for the connection 3558 */ 3559 void irdma_free_lsmm_rsrc(struct irdma_qp *iwqp) 3560 { 3561 struct irdma_device *iwdev; 3562 3563 iwdev = iwqp->iwdev; 3564 3565 if (iwqp->ietf_mem.va) { 3566 if (iwqp->lsmm_mr) 3567 iwdev->ibdev.ops.dereg_mr(iwqp->lsmm_mr, NULL); 3568 dma_free_coherent(iwdev->rf->sc_dev.hw->device, 3569 iwqp->ietf_mem.size, iwqp->ietf_mem.va, 3570 iwqp->ietf_mem.pa); 3571 iwqp->ietf_mem.va = NULL; 3572 iwqp->ietf_mem.va = NULL; 3573 } 3574 } 3575 3576 /** 3577 * irdma_accept - registered call for connection to be accepted 3578 * @cm_id: cm information for passive connection 3579 * @conn_param: accpet parameters 3580 */ 3581 int irdma_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) 3582 { 3583 struct ib_qp *ibqp; 3584 struct irdma_qp *iwqp; 3585 struct irdma_device *iwdev; 3586 struct irdma_sc_dev *dev; 3587 struct irdma_cm_node *cm_node; 3588 struct ib_qp_attr attr = {}; 3589 int passive_state; 3590 struct ib_mr *ibmr; 3591 struct irdma_pd *iwpd; 3592 u16 buf_len = 0; 3593 struct irdma_kmem_info accept; 3594 u64 tagged_offset; 3595 int wait_ret; 3596 int ret = 0; 3597 3598 ibqp = irdma_get_qp(cm_id->device, conn_param->qpn); 3599 if (!ibqp) 3600 return -EINVAL; 3601 3602 iwqp = to_iwqp(ibqp); 3603 iwdev = iwqp->iwdev; 3604 dev = &iwdev->rf->sc_dev; 3605 cm_node = cm_id->provider_data; 3606 3607 if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) { 3608 cm_node->ipv4 = true; 3609 cm_node->vlan_id = irdma_get_vlan_ipv4(cm_node->loc_addr); 3610 } else { 3611 cm_node->ipv4 = false; 3612 irdma_netdev_vlan_ipv6(cm_node->loc_addr, &cm_node->vlan_id, 3613 NULL); 3614 } 3615 ibdev_dbg(&iwdev->ibdev, "CM: Accept vlan_id=%d\n", 3616 cm_node->vlan_id); 3617 3618 trace_irdma_accept(cm_node, 0, NULL); 3619 3620 if (cm_node->state == IRDMA_CM_STATE_LISTENER_DESTROYED) { 3621 ret = -EINVAL; 3622 goto error; 3623 } 3624 3625 passive_state = atomic_add_return(1, &cm_node->passive_state); 3626 if (passive_state == IRDMA_SEND_RESET_EVENT) { 3627 ret = -ECONNRESET; 3628 goto error; 3629 } 3630 3631 buf_len = conn_param->private_data_len + IRDMA_MAX_IETF_SIZE; 3632 iwqp->ietf_mem.size = ALIGN(buf_len, 1); 3633 iwqp->ietf_mem.va = dma_alloc_coherent(dev->hw->device, 3634 iwqp->ietf_mem.size, 3635 &iwqp->ietf_mem.pa, GFP_KERNEL); 3636 if (!iwqp->ietf_mem.va) { 3637 ret = -ENOMEM; 3638 goto error; 3639 } 3640 3641 cm_node->pdata.size = conn_param->private_data_len; 3642 accept.addr = iwqp->ietf_mem.va; 3643 accept.size = irdma_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY); 3644 memcpy((u8 *)accept.addr + accept.size, conn_param->private_data, 3645 conn_param->private_data_len); 3646 3647 if (cm_node->dev->ws_add(iwqp->sc_qp.vsi, cm_node->user_pri)) { 3648 ret = -ENOMEM; 3649 goto error; 3650 } 3651 iwqp->sc_qp.user_pri = cm_node->user_pri; 3652 irdma_qp_add_qos(&iwqp->sc_qp); 3653 /* setup our first outgoing iWarp send WQE (the IETF frame response) */ 3654 iwpd = iwqp->iwpd; 3655 tagged_offset = (uintptr_t)iwqp->ietf_mem.va; 3656 ibmr = irdma_reg_phys_mr(&iwpd->ibpd, iwqp->ietf_mem.pa, buf_len, 3657 IB_ACCESS_LOCAL_WRITE, &tagged_offset); 3658 if (IS_ERR(ibmr)) { 3659 ret = -ENOMEM; 3660 goto error; 3661 } 3662 3663 ibmr->pd = &iwpd->ibpd; 3664 ibmr->device = iwpd->ibpd.device; 3665 iwqp->lsmm_mr = ibmr; 3666 if (iwqp->page) 3667 iwqp->sc_qp.qp_uk.sq_base = kmap_local_page(iwqp->page); 3668 3669 cm_node->lsmm_size = accept.size + conn_param->private_data_len; 3670 irdma_sc_send_lsmm(&iwqp->sc_qp, iwqp->ietf_mem.va, cm_node->lsmm_size, 3671 ibmr->lkey); 3672 3673 if (iwqp->page) 3674 kunmap_local(iwqp->sc_qp.qp_uk.sq_base); 3675 3676 iwqp->cm_id = cm_id; 3677 cm_node->cm_id = cm_id; 3678 3679 cm_id->provider_data = iwqp; 3680 iwqp->active_conn = 0; 3681 iwqp->cm_node = cm_node; 3682 cm_node->iwqp = iwqp; 3683 irdma_cm_init_tsa_conn(iwqp, cm_node); 3684 irdma_qp_add_ref(&iwqp->ibqp); 3685 cm_id->add_ref(cm_id); 3686 3687 attr.qp_state = IB_QPS_RTS; 3688 cm_node->qhash_set = false; 3689 cm_node->cm_core->cm_free_ah(cm_node); 3690 3691 irdma_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); 3692 if (dev->hw_attrs.uk_attrs.feature_flags & IRDMA_FEATURE_RTS_AE) { 3693 wait_ret = wait_event_interruptible_timeout(iwqp->waitq, 3694 iwqp->rts_ae_rcvd, 3695 IRDMA_MAX_TIMEOUT); 3696 if (!wait_ret) { 3697 ibdev_dbg(&iwdev->ibdev, 3698 "CM: Slow Connection: cm_node=%p, loc_port=%d, rem_port=%d, cm_id=%p\n", 3699 cm_node, cm_node->loc_port, 3700 cm_node->rem_port, cm_node->cm_id); 3701 ret = -ECONNRESET; 3702 goto error; 3703 } 3704 } 3705 3706 irdma_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0); 3707 cm_node->accelerated = true; 3708 complete(&cm_node->establish_comp); 3709 3710 if (cm_node->accept_pend) { 3711 atomic_dec(&cm_node->listener->pend_accepts_cnt); 3712 cm_node->accept_pend = 0; 3713 } 3714 3715 ibdev_dbg(&iwdev->ibdev, 3716 "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", 3717 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr, 3718 cm_node->loc_addr, cm_node, cm_id, ibqp->qp_num); 3719 cm_node->cm_core->stats_accepts++; 3720 3721 return 0; 3722 error: 3723 irdma_free_lsmm_rsrc(iwqp); 3724 irdma_rem_ref_cm_node(cm_node); 3725 3726 return ret; 3727 } 3728 3729 /** 3730 * irdma_reject - registered call for connection to be rejected 3731 * @cm_id: cm information for passive connection 3732 * @pdata: private data to be sent 3733 * @pdata_len: private data length 3734 */ 3735 int irdma_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len) 3736 { 3737 struct irdma_device *iwdev; 3738 struct irdma_cm_node *cm_node; 3739 3740 cm_node = cm_id->provider_data; 3741 cm_node->pdata.size = pdata_len; 3742 3743 trace_irdma_reject(cm_node, 0, NULL); 3744 3745 iwdev = to_iwdev(cm_id->device); 3746 if (!iwdev) 3747 return -EINVAL; 3748 3749 cm_node->cm_core->stats_rejects++; 3750 3751 if (pdata_len + sizeof(struct ietf_mpa_v2) > IRDMA_MAX_CM_BUF) 3752 return -EINVAL; 3753 3754 return irdma_cm_reject(cm_node, pdata, pdata_len); 3755 } 3756 3757 /** 3758 * irdma_connect - registered call for connection to be established 3759 * @cm_id: cm information for passive connection 3760 * @conn_param: Information about the connection 3761 */ 3762 int irdma_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) 3763 { 3764 struct ib_qp *ibqp; 3765 struct irdma_qp *iwqp; 3766 struct irdma_device *iwdev; 3767 struct irdma_cm_node *cm_node; 3768 struct irdma_cm_info cm_info; 3769 struct sockaddr_in *laddr; 3770 struct sockaddr_in *raddr; 3771 struct sockaddr_in6 *laddr6; 3772 struct sockaddr_in6 *raddr6; 3773 int ret = 0; 3774 3775 ibqp = irdma_get_qp(cm_id->device, conn_param->qpn); 3776 if (!ibqp) 3777 return -EINVAL; 3778 iwqp = to_iwqp(ibqp); 3779 if (!iwqp) 3780 return -EINVAL; 3781 iwdev = iwqp->iwdev; 3782 if (!iwdev) 3783 return -EINVAL; 3784 3785 laddr = (struct sockaddr_in *)&cm_id->m_local_addr; 3786 raddr = (struct sockaddr_in *)&cm_id->m_remote_addr; 3787 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr; 3788 raddr6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr; 3789 3790 if (!(laddr->sin_port) || !(raddr->sin_port)) 3791 return -EINVAL; 3792 3793 iwqp->active_conn = 1; 3794 iwqp->cm_id = NULL; 3795 cm_id->provider_data = iwqp; 3796 3797 /* set up the connection params for the node */ 3798 if (cm_id->remote_addr.ss_family == AF_INET) { 3799 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV4) 3800 return -EINVAL; 3801 3802 cm_info.ipv4 = true; 3803 memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr)); 3804 memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr)); 3805 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr); 3806 cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr); 3807 cm_info.loc_port = ntohs(laddr->sin_port); 3808 cm_info.rem_port = ntohs(raddr->sin_port); 3809 cm_info.vlan_id = irdma_get_vlan_ipv4(cm_info.loc_addr); 3810 } else { 3811 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV6) 3812 return -EINVAL; 3813 3814 cm_info.ipv4 = false; 3815 irdma_copy_ip_ntohl(cm_info.loc_addr, 3816 laddr6->sin6_addr.in6_u.u6_addr32); 3817 irdma_copy_ip_ntohl(cm_info.rem_addr, 3818 raddr6->sin6_addr.in6_u.u6_addr32); 3819 cm_info.loc_port = ntohs(laddr6->sin6_port); 3820 cm_info.rem_port = ntohs(raddr6->sin6_port); 3821 irdma_netdev_vlan_ipv6(cm_info.loc_addr, &cm_info.vlan_id, 3822 NULL); 3823 } 3824 cm_info.cm_id = cm_id; 3825 cm_info.qh_qpid = iwdev->vsi.ilq->qp_id; 3826 cm_info.tos = cm_id->tos; 3827 if (iwdev->vsi.dscp_mode) 3828 cm_info.user_pri = 3829 iwqp->sc_qp.vsi->dscp_map[irdma_tos2dscp(cm_info.tos)]; 3830 else 3831 cm_info.user_pri = rt_tos2priority(cm_id->tos); 3832 3833 if (iwqp->sc_qp.dev->ws_add(iwqp->sc_qp.vsi, cm_info.user_pri)) 3834 return -ENOMEM; 3835 iwqp->sc_qp.user_pri = cm_info.user_pri; 3836 irdma_qp_add_qos(&iwqp->sc_qp); 3837 ibdev_dbg(&iwdev->ibdev, "DCB: TOS:[%d] UP:[%d]\n", cm_id->tos, 3838 cm_info.user_pri); 3839 3840 trace_irdma_dcb_tos(iwdev, cm_id->tos, cm_info.user_pri); 3841 3842 ret = irdma_create_cm_node(&iwdev->cm_core, iwdev, conn_param, &cm_info, 3843 &cm_node); 3844 if (ret) 3845 return ret; 3846 ret = cm_node->cm_core->cm_create_ah(cm_node, true); 3847 if (ret) 3848 goto err; 3849 if (irdma_manage_qhash(iwdev, &cm_info, 3850 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 3851 IRDMA_QHASH_MANAGE_TYPE_ADD, NULL, true)) { 3852 ret = -EINVAL; 3853 goto err; 3854 } 3855 cm_node->qhash_set = true; 3856 3857 cm_node->apbvt_entry = irdma_add_apbvt(iwdev, cm_info.loc_port); 3858 if (!cm_node->apbvt_entry) { 3859 ret = -EINVAL; 3860 goto err; 3861 } 3862 3863 cm_node->apbvt_set = true; 3864 iwqp->cm_node = cm_node; 3865 cm_node->iwqp = iwqp; 3866 iwqp->cm_id = cm_id; 3867 irdma_qp_add_ref(&iwqp->ibqp); 3868 cm_id->add_ref(cm_id); 3869 3870 if (cm_node->state != IRDMA_CM_STATE_OFFLOADED) { 3871 cm_node->state = IRDMA_CM_STATE_SYN_SENT; 3872 ret = irdma_send_syn(cm_node, 0); 3873 if (ret) 3874 goto err; 3875 } 3876 3877 ibdev_dbg(&iwdev->ibdev, 3878 "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", 3879 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr, 3880 cm_node->loc_addr, cm_node, cm_id, ibqp->qp_num); 3881 3882 trace_irdma_connect(cm_node, 0, NULL); 3883 3884 return 0; 3885 3886 err: 3887 if (cm_info.ipv4) 3888 ibdev_dbg(&iwdev->ibdev, 3889 "CM: connect() FAILED: dest addr=%pI4", 3890 cm_info.rem_addr); 3891 else 3892 ibdev_dbg(&iwdev->ibdev, 3893 "CM: connect() FAILED: dest addr=%pI6", 3894 cm_info.rem_addr); 3895 irdma_rem_ref_cm_node(cm_node); 3896 iwdev->cm_core.stats_connect_errs++; 3897 3898 return ret; 3899 } 3900 3901 /** 3902 * irdma_create_listen - registered call creating listener 3903 * @cm_id: cm information for passive connection 3904 * @backlog: to max accept pending count 3905 */ 3906 int irdma_create_listen(struct iw_cm_id *cm_id, int backlog) 3907 { 3908 struct irdma_device *iwdev; 3909 struct irdma_cm_listener *cm_listen_node; 3910 struct irdma_cm_info cm_info = {}; 3911 struct sockaddr_in *laddr; 3912 struct sockaddr_in6 *laddr6; 3913 bool wildcard = false; 3914 int err; 3915 3916 iwdev = to_iwdev(cm_id->device); 3917 if (!iwdev) 3918 return -EINVAL; 3919 3920 laddr = (struct sockaddr_in *)&cm_id->m_local_addr; 3921 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr; 3922 cm_info.qh_qpid = iwdev->vsi.ilq->qp_id; 3923 3924 if (laddr->sin_family == AF_INET) { 3925 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV4) 3926 return -EINVAL; 3927 3928 cm_info.ipv4 = true; 3929 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr); 3930 cm_info.loc_port = ntohs(laddr->sin_port); 3931 3932 if (laddr->sin_addr.s_addr != htonl(INADDR_ANY)) { 3933 cm_info.vlan_id = irdma_get_vlan_ipv4(cm_info.loc_addr); 3934 } else { 3935 cm_info.vlan_id = 0xFFFF; 3936 wildcard = true; 3937 } 3938 } else { 3939 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV6) 3940 return -EINVAL; 3941 3942 cm_info.ipv4 = false; 3943 irdma_copy_ip_ntohl(cm_info.loc_addr, 3944 laddr6->sin6_addr.in6_u.u6_addr32); 3945 cm_info.loc_port = ntohs(laddr6->sin6_port); 3946 if (ipv6_addr_type(&laddr6->sin6_addr) != IPV6_ADDR_ANY) { 3947 irdma_netdev_vlan_ipv6(cm_info.loc_addr, 3948 &cm_info.vlan_id, NULL); 3949 } else { 3950 cm_info.vlan_id = 0xFFFF; 3951 wildcard = true; 3952 } 3953 } 3954 3955 if (cm_info.vlan_id >= VLAN_N_VID && iwdev->dcb_vlan_mode) 3956 cm_info.vlan_id = 0; 3957 cm_info.backlog = backlog; 3958 cm_info.cm_id = cm_id; 3959 3960 trace_irdma_create_listen(iwdev, &cm_info); 3961 3962 cm_listen_node = irdma_make_listen_node(&iwdev->cm_core, iwdev, 3963 &cm_info); 3964 if (!cm_listen_node) { 3965 ibdev_dbg(&iwdev->ibdev, 3966 "CM: cm_listen_node == NULL\n"); 3967 return -ENOMEM; 3968 } 3969 3970 cm_id->provider_data = cm_listen_node; 3971 3972 cm_listen_node->tos = cm_id->tos; 3973 if (iwdev->vsi.dscp_mode) 3974 cm_listen_node->user_pri = 3975 iwdev->vsi.dscp_map[irdma_tos2dscp(cm_id->tos)]; 3976 else 3977 cm_listen_node->user_pri = rt_tos2priority(cm_id->tos); 3978 cm_info.user_pri = cm_listen_node->user_pri; 3979 if (!cm_listen_node->reused_node) { 3980 if (wildcard) { 3981 err = irdma_add_mqh(iwdev, &cm_info, cm_listen_node); 3982 if (err) 3983 goto error; 3984 } else { 3985 err = irdma_manage_qhash(iwdev, &cm_info, 3986 IRDMA_QHASH_TYPE_TCP_SYN, 3987 IRDMA_QHASH_MANAGE_TYPE_ADD, 3988 NULL, true); 3989 if (err) 3990 goto error; 3991 3992 cm_listen_node->qhash_set = true; 3993 } 3994 3995 cm_listen_node->apbvt_entry = irdma_add_apbvt(iwdev, 3996 cm_info.loc_port); 3997 if (!cm_listen_node->apbvt_entry) 3998 goto error; 3999 } 4000 cm_id->add_ref(cm_id); 4001 cm_listen_node->cm_core->stats_listen_created++; 4002 ibdev_dbg(&iwdev->ibdev, 4003 "CM: loc_port=0x%04x loc_addr=%pI4 cm_listen_node=%p cm_id=%p qhash_set=%d vlan_id=%d\n", 4004 cm_listen_node->loc_port, cm_listen_node->loc_addr, 4005 cm_listen_node, cm_listen_node->cm_id, 4006 cm_listen_node->qhash_set, cm_listen_node->vlan_id); 4007 4008 return 0; 4009 4010 error: 4011 4012 irdma_cm_del_listen(&iwdev->cm_core, cm_listen_node, false); 4013 4014 return -EINVAL; 4015 } 4016 4017 /** 4018 * irdma_destroy_listen - registered call to destroy listener 4019 * @cm_id: cm information for passive connection 4020 */ 4021 int irdma_destroy_listen(struct iw_cm_id *cm_id) 4022 { 4023 struct irdma_device *iwdev; 4024 4025 iwdev = to_iwdev(cm_id->device); 4026 if (cm_id->provider_data) 4027 irdma_cm_del_listen(&iwdev->cm_core, cm_id->provider_data, 4028 true); 4029 else 4030 ibdev_dbg(&iwdev->ibdev, 4031 "CM: cm_id->provider_data was NULL\n"); 4032 4033 cm_id->rem_ref(cm_id); 4034 4035 return 0; 4036 } 4037 4038 /** 4039 * irdma_teardown_list_prep - add conn nodes slated for tear down to list 4040 * @cm_core: cm's core 4041 * @teardown_list: a list to which cm_node will be selected 4042 * @ipaddr: pointer to ip address 4043 * @nfo: pointer to cm_info structure instance 4044 * @disconnect_all: flag indicating disconnect all QPs 4045 */ 4046 static void irdma_teardown_list_prep(struct irdma_cm_core *cm_core, 4047 struct list_head *teardown_list, 4048 u32 *ipaddr, 4049 struct irdma_cm_info *nfo, 4050 bool disconnect_all) 4051 { 4052 struct irdma_cm_node *cm_node; 4053 int bkt; 4054 4055 hash_for_each_rcu(cm_core->cm_hash_tbl, bkt, cm_node, list) { 4056 if ((disconnect_all || 4057 (nfo->vlan_id == cm_node->vlan_id && 4058 !memcmp(cm_node->loc_addr, ipaddr, nfo->ipv4 ? 4 : 16))) && 4059 refcount_inc_not_zero(&cm_node->refcnt)) 4060 list_add(&cm_node->teardown_entry, teardown_list); 4061 } 4062 } 4063 4064 /** 4065 * irdma_cm_event_connected - handle connected active node 4066 * @event: the info for cm_node of connection 4067 */ 4068 static void irdma_cm_event_connected(struct irdma_cm_event *event) 4069 { 4070 struct irdma_qp *iwqp; 4071 struct irdma_device *iwdev; 4072 struct irdma_cm_node *cm_node; 4073 struct irdma_sc_dev *dev; 4074 struct ib_qp_attr attr = {}; 4075 struct iw_cm_id *cm_id; 4076 int status; 4077 bool read0; 4078 int wait_ret = 0; 4079 4080 cm_node = event->cm_node; 4081 cm_id = cm_node->cm_id; 4082 iwqp = cm_id->provider_data; 4083 iwdev = iwqp->iwdev; 4084 dev = &iwdev->rf->sc_dev; 4085 if (iwqp->sc_qp.qp_uk.destroy_pending) { 4086 status = -ETIMEDOUT; 4087 goto error; 4088 } 4089 4090 irdma_cm_init_tsa_conn(iwqp, cm_node); 4091 read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO); 4092 if (iwqp->page) 4093 iwqp->sc_qp.qp_uk.sq_base = kmap_local_page(iwqp->page); 4094 irdma_sc_send_rtt(&iwqp->sc_qp, read0); 4095 if (iwqp->page) 4096 kunmap_local(iwqp->sc_qp.qp_uk.sq_base); 4097 4098 attr.qp_state = IB_QPS_RTS; 4099 cm_node->qhash_set = false; 4100 irdma_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); 4101 if (dev->hw_attrs.uk_attrs.feature_flags & IRDMA_FEATURE_RTS_AE) { 4102 wait_ret = wait_event_interruptible_timeout(iwqp->waitq, 4103 iwqp->rts_ae_rcvd, 4104 IRDMA_MAX_TIMEOUT); 4105 if (!wait_ret) 4106 ibdev_dbg(&iwdev->ibdev, 4107 "CM: Slow Connection: cm_node=%p, loc_port=%d, rem_port=%d, cm_id=%p\n", 4108 cm_node, cm_node->loc_port, 4109 cm_node->rem_port, cm_node->cm_id); 4110 } 4111 4112 irdma_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 0); 4113 cm_node->accelerated = true; 4114 complete(&cm_node->establish_comp); 4115 cm_node->cm_core->cm_free_ah(cm_node); 4116 return; 4117 4118 error: 4119 iwqp->cm_id = NULL; 4120 cm_id->provider_data = NULL; 4121 irdma_send_cm_event(event->cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 4122 status); 4123 irdma_rem_ref_cm_node(event->cm_node); 4124 } 4125 4126 /** 4127 * irdma_cm_event_reset - handle reset 4128 * @event: the info for cm_node of connection 4129 */ 4130 static void irdma_cm_event_reset(struct irdma_cm_event *event) 4131 { 4132 struct irdma_cm_node *cm_node = event->cm_node; 4133 struct iw_cm_id *cm_id = cm_node->cm_id; 4134 struct irdma_qp *iwqp; 4135 4136 if (!cm_id) 4137 return; 4138 4139 iwqp = cm_id->provider_data; 4140 if (!iwqp) 4141 return; 4142 4143 ibdev_dbg(&cm_node->iwdev->ibdev, 4144 "CM: reset event %p - cm_id = %p\n", event->cm_node, cm_id); 4145 iwqp->cm_id = NULL; 4146 4147 irdma_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT, 4148 -ECONNRESET); 4149 irdma_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0); 4150 } 4151 4152 /** 4153 * irdma_cm_event_handler - send event to cm upper layer 4154 * @work: pointer of cm event info. 4155 */ 4156 static void irdma_cm_event_handler(struct work_struct *work) 4157 { 4158 struct irdma_cm_event *event = container_of(work, struct irdma_cm_event, event_work); 4159 struct irdma_cm_node *cm_node; 4160 4161 if (!event || !event->cm_node || !event->cm_node->cm_core) 4162 return; 4163 4164 cm_node = event->cm_node; 4165 trace_irdma_cm_event_handler(cm_node, event->type, NULL); 4166 4167 switch (event->type) { 4168 case IRDMA_CM_EVENT_MPA_REQ: 4169 irdma_send_cm_event(cm_node, cm_node->cm_id, 4170 IW_CM_EVENT_CONNECT_REQUEST, 0); 4171 break; 4172 case IRDMA_CM_EVENT_RESET: 4173 irdma_cm_event_reset(event); 4174 break; 4175 case IRDMA_CM_EVENT_CONNECTED: 4176 if (!event->cm_node->cm_id || 4177 event->cm_node->state != IRDMA_CM_STATE_OFFLOADED) 4178 break; 4179 irdma_cm_event_connected(event); 4180 break; 4181 case IRDMA_CM_EVENT_MPA_REJECT: 4182 if (!event->cm_node->cm_id || 4183 cm_node->state == IRDMA_CM_STATE_OFFLOADED) 4184 break; 4185 irdma_send_cm_event(cm_node, cm_node->cm_id, 4186 IW_CM_EVENT_CONNECT_REPLY, -ECONNREFUSED); 4187 break; 4188 case IRDMA_CM_EVENT_ABORTED: 4189 if (!event->cm_node->cm_id || 4190 event->cm_node->state == IRDMA_CM_STATE_OFFLOADED) 4191 break; 4192 irdma_event_connect_error(event); 4193 break; 4194 default: 4195 ibdev_dbg(&cm_node->iwdev->ibdev, 4196 "CM: bad event type = %d\n", event->type); 4197 break; 4198 } 4199 4200 irdma_rem_ref_cm_node(event->cm_node); 4201 kfree(event); 4202 } 4203 4204 /** 4205 * irdma_cm_post_event - queue event request for worker thread 4206 * @event: cm node's info for up event call 4207 */ 4208 static void irdma_cm_post_event(struct irdma_cm_event *event) 4209 { 4210 refcount_inc(&event->cm_node->refcnt); 4211 INIT_WORK(&event->event_work, irdma_cm_event_handler); 4212 queue_work(event->cm_node->cm_core->event_wq, &event->event_work); 4213 } 4214 4215 /** 4216 * irdma_cm_teardown_connections - teardown QPs 4217 * @iwdev: device pointer 4218 * @ipaddr: Pointer to IPv4 or IPv6 address 4219 * @nfo: Connection info 4220 * @disconnect_all: flag indicating disconnect all QPs 4221 * 4222 * teardown QPs where source or destination addr matches ip addr 4223 */ 4224 void irdma_cm_teardown_connections(struct irdma_device *iwdev, u32 *ipaddr, 4225 struct irdma_cm_info *nfo, 4226 bool disconnect_all) 4227 { 4228 struct irdma_cm_core *cm_core = &iwdev->cm_core; 4229 struct list_head *list_core_temp; 4230 struct list_head *list_node; 4231 struct irdma_cm_node *cm_node; 4232 struct list_head teardown_list; 4233 struct ib_qp_attr attr; 4234 struct irdma_sc_vsi *vsi = &iwdev->vsi; 4235 struct irdma_sc_qp *sc_qp; 4236 struct irdma_qp *qp; 4237 int i; 4238 4239 INIT_LIST_HEAD(&teardown_list); 4240 4241 rcu_read_lock(); 4242 irdma_teardown_list_prep(cm_core, &teardown_list, ipaddr, nfo, disconnect_all); 4243 rcu_read_unlock(); 4244 4245 list_for_each_safe (list_node, list_core_temp, &teardown_list) { 4246 cm_node = container_of(list_node, struct irdma_cm_node, 4247 teardown_entry); 4248 attr.qp_state = IB_QPS_ERR; 4249 irdma_modify_qp(&cm_node->iwqp->ibqp, &attr, IB_QP_STATE, NULL); 4250 if (iwdev->rf->reset) 4251 irdma_cm_disconn(cm_node->iwqp); 4252 irdma_rem_ref_cm_node(cm_node); 4253 } 4254 if (!iwdev->roce_mode) 4255 return; 4256 4257 INIT_LIST_HEAD(&teardown_list); 4258 for (i = 0; i < IRDMA_MAX_USER_PRIORITY; i++) { 4259 mutex_lock(&vsi->qos[i].qos_mutex); 4260 list_for_each_safe (list_node, list_core_temp, 4261 &vsi->qos[i].qplist) { 4262 u32 qp_ip[4]; 4263 4264 sc_qp = container_of(list_node, struct irdma_sc_qp, 4265 list); 4266 if (sc_qp->qp_uk.qp_type != IRDMA_QP_TYPE_ROCE_RC) 4267 continue; 4268 4269 qp = sc_qp->qp_uk.back_qp; 4270 if (!disconnect_all) { 4271 if (nfo->ipv4) 4272 qp_ip[0] = qp->udp_info.local_ipaddr[3]; 4273 else 4274 memcpy(qp_ip, 4275 &qp->udp_info.local_ipaddr[0], 4276 sizeof(qp_ip)); 4277 } 4278 4279 if (disconnect_all || 4280 (nfo->vlan_id == (qp->udp_info.vlan_tag & VLAN_VID_MASK) && 4281 !memcmp(qp_ip, ipaddr, nfo->ipv4 ? 4 : 16))) { 4282 spin_lock(&iwdev->rf->qptable_lock); 4283 if (iwdev->rf->qp_table[sc_qp->qp_uk.qp_id]) { 4284 irdma_qp_add_ref(&qp->ibqp); 4285 list_add(&qp->teardown_entry, 4286 &teardown_list); 4287 } 4288 spin_unlock(&iwdev->rf->qptable_lock); 4289 } 4290 } 4291 mutex_unlock(&vsi->qos[i].qos_mutex); 4292 } 4293 4294 list_for_each_safe (list_node, list_core_temp, &teardown_list) { 4295 qp = container_of(list_node, struct irdma_qp, teardown_entry); 4296 attr.qp_state = IB_QPS_ERR; 4297 irdma_modify_qp_roce(&qp->ibqp, &attr, IB_QP_STATE, NULL); 4298 irdma_qp_rem_ref(&qp->ibqp); 4299 } 4300 } 4301 4302 /** 4303 * irdma_qhash_ctrl - enable/disable qhash for list 4304 * @iwdev: device pointer 4305 * @parent_listen_node: parent listen node 4306 * @nfo: cm info node 4307 * @ipaddr: Pointer to IPv4 or IPv6 address 4308 * @ipv4: flag indicating IPv4 when true 4309 * @ifup: flag indicating interface up when true 4310 * 4311 * Enables or disables the qhash for the node in the child 4312 * listen list that matches ipaddr. If no matching IP was found 4313 * it will allocate and add a new child listen node to the 4314 * parent listen node. The listen_list_lock is assumed to be 4315 * held when called. 4316 */ 4317 static void irdma_qhash_ctrl(struct irdma_device *iwdev, 4318 struct irdma_cm_listener *parent_listen_node, 4319 struct irdma_cm_info *nfo, u32 *ipaddr, bool ipv4, 4320 bool ifup) 4321 { 4322 struct list_head *child_listen_list = &parent_listen_node->child_listen_list; 4323 struct irdma_cm_listener *child_listen_node; 4324 struct list_head *pos, *tpos; 4325 bool node_allocated = false; 4326 enum irdma_quad_hash_manage_type op = ifup ? 4327 IRDMA_QHASH_MANAGE_TYPE_ADD : 4328 IRDMA_QHASH_MANAGE_TYPE_DELETE; 4329 int err; 4330 4331 list_for_each_safe (pos, tpos, child_listen_list) { 4332 child_listen_node = list_entry(pos, struct irdma_cm_listener, 4333 child_listen_list); 4334 if (!memcmp(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16)) 4335 goto set_qhash; 4336 } 4337 4338 /* if not found then add a child listener if interface is going up */ 4339 if (!ifup) 4340 return; 4341 child_listen_node = kmemdup(parent_listen_node, 4342 sizeof(*child_listen_node), GFP_ATOMIC); 4343 if (!child_listen_node) 4344 return; 4345 4346 node_allocated = true; 4347 memcpy(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16); 4348 4349 set_qhash: 4350 memcpy(nfo->loc_addr, child_listen_node->loc_addr, 4351 sizeof(nfo->loc_addr)); 4352 nfo->vlan_id = child_listen_node->vlan_id; 4353 err = irdma_manage_qhash(iwdev, nfo, IRDMA_QHASH_TYPE_TCP_SYN, op, NULL, 4354 false); 4355 if (!err) { 4356 child_listen_node->qhash_set = ifup; 4357 if (node_allocated) 4358 list_add(&child_listen_node->child_listen_list, 4359 &parent_listen_node->child_listen_list); 4360 } else if (node_allocated) { 4361 kfree(child_listen_node); 4362 } 4363 } 4364 4365 /** 4366 * irdma_if_notify - process an ifdown on an interface 4367 * @iwdev: device pointer 4368 * @netdev: network device structure 4369 * @ipaddr: Pointer to IPv4 or IPv6 address 4370 * @ipv4: flag indicating IPv4 when true 4371 * @ifup: flag indicating interface up when true 4372 */ 4373 void irdma_if_notify(struct irdma_device *iwdev, struct net_device *netdev, 4374 u32 *ipaddr, bool ipv4, bool ifup) 4375 { 4376 struct irdma_cm_core *cm_core = &iwdev->cm_core; 4377 unsigned long flags; 4378 struct irdma_cm_listener *listen_node; 4379 static const u32 ip_zero[4] = { 0, 0, 0, 0 }; 4380 struct irdma_cm_info nfo = {}; 4381 u16 vlan_id = rdma_vlan_dev_vlan_id(netdev); 4382 enum irdma_quad_hash_manage_type op = ifup ? 4383 IRDMA_QHASH_MANAGE_TYPE_ADD : 4384 IRDMA_QHASH_MANAGE_TYPE_DELETE; 4385 4386 nfo.vlan_id = vlan_id; 4387 nfo.ipv4 = ipv4; 4388 nfo.qh_qpid = 1; 4389 4390 /* Disable or enable qhash for listeners */ 4391 spin_lock_irqsave(&cm_core->listen_list_lock, flags); 4392 list_for_each_entry (listen_node, &cm_core->listen_list, list) { 4393 if (vlan_id != listen_node->vlan_id || 4394 (memcmp(listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16) && 4395 memcmp(listen_node->loc_addr, ip_zero, ipv4 ? 4 : 16))) 4396 continue; 4397 4398 memcpy(nfo.loc_addr, listen_node->loc_addr, 4399 sizeof(nfo.loc_addr)); 4400 nfo.loc_port = listen_node->loc_port; 4401 nfo.user_pri = listen_node->user_pri; 4402 if (!list_empty(&listen_node->child_listen_list)) { 4403 irdma_qhash_ctrl(iwdev, listen_node, &nfo, ipaddr, ipv4, 4404 ifup); 4405 } else if (memcmp(listen_node->loc_addr, ip_zero, 4406 ipv4 ? 4 : 16)) { 4407 if (!irdma_manage_qhash(iwdev, &nfo, 4408 IRDMA_QHASH_TYPE_TCP_SYN, op, 4409 NULL, false)) 4410 listen_node->qhash_set = ifup; 4411 } 4412 } 4413 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); 4414 4415 /* disconnect any connected qp's on ifdown */ 4416 if (!ifup) 4417 irdma_cm_teardown_connections(iwdev, ipaddr, &nfo, false); 4418 } 4419