1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB 2 /* Copyright (c) 2015 - 2021 Intel Corporation */ 3 #include "main.h" 4 #include "trace.h" 5 6 static void irdma_cm_post_event(struct irdma_cm_event *event); 7 static void irdma_disconnect_worker(struct work_struct *work); 8 9 /** 10 * irdma_free_sqbuf - put back puda buffer if refcount is 0 11 * @vsi: The VSI structure of the device 12 * @bufp: puda buffer to free 13 */ 14 void irdma_free_sqbuf(struct irdma_sc_vsi *vsi, void *bufp) 15 { 16 struct irdma_puda_buf *buf = bufp; 17 struct irdma_puda_rsrc *ilq = vsi->ilq; 18 19 if (refcount_dec_and_test(&buf->refcount)) 20 irdma_puda_ret_bufpool(ilq, buf); 21 } 22 23 /** 24 * irdma_record_ird_ord - Record IRD/ORD passed in 25 * @cm_node: connection's node 26 * @conn_ird: connection IRD 27 * @conn_ord: connection ORD 28 */ 29 static void irdma_record_ird_ord(struct irdma_cm_node *cm_node, u32 conn_ird, 30 u32 conn_ord) 31 { 32 if (conn_ird > cm_node->dev->hw_attrs.max_hw_ird) 33 conn_ird = cm_node->dev->hw_attrs.max_hw_ird; 34 35 if (conn_ord > cm_node->dev->hw_attrs.max_hw_ord) 36 conn_ord = cm_node->dev->hw_attrs.max_hw_ord; 37 else if (!conn_ord && cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO) 38 conn_ord = 1; 39 cm_node->ird_size = conn_ird; 40 cm_node->ord_size = conn_ord; 41 } 42 43 /** 44 * irdma_copy_ip_ntohl - copy IP address from network to host 45 * @dst: IP address in host order 46 * @src: IP address in network order (big endian) 47 */ 48 void irdma_copy_ip_ntohl(u32 *dst, __be32 *src) 49 { 50 *dst++ = ntohl(*src++); 51 *dst++ = ntohl(*src++); 52 *dst++ = ntohl(*src++); 53 *dst = ntohl(*src); 54 } 55 56 /** 57 * irdma_copy_ip_htonl - copy IP address from host to network order 58 * @dst: IP address in network order (big endian) 59 * @src: IP address in host order 60 */ 61 void irdma_copy_ip_htonl(__be32 *dst, u32 *src) 62 { 63 *dst++ = htonl(*src++); 64 *dst++ = htonl(*src++); 65 *dst++ = htonl(*src++); 66 *dst = htonl(*src); 67 } 68 69 /** 70 * irdma_get_addr_info 71 * @cm_node: contains ip/tcp info 72 * @cm_info: to get a copy of the cm_node ip/tcp info 73 */ 74 static void irdma_get_addr_info(struct irdma_cm_node *cm_node, 75 struct irdma_cm_info *cm_info) 76 { 77 memset(cm_info, 0, sizeof(*cm_info)); 78 cm_info->ipv4 = cm_node->ipv4; 79 cm_info->vlan_id = cm_node->vlan_id; 80 memcpy(cm_info->loc_addr, cm_node->loc_addr, sizeof(cm_info->loc_addr)); 81 memcpy(cm_info->rem_addr, cm_node->rem_addr, sizeof(cm_info->rem_addr)); 82 cm_info->loc_port = cm_node->loc_port; 83 cm_info->rem_port = cm_node->rem_port; 84 } 85 86 /** 87 * irdma_fill_sockaddr4 - fill in addr info for IPv4 connection 88 * @cm_node: connection's node 89 * @event: upper layer's cm event 90 */ 91 static inline void irdma_fill_sockaddr4(struct irdma_cm_node *cm_node, 92 struct iw_cm_event *event) 93 { 94 struct sockaddr_in *laddr = (struct sockaddr_in *)&event->local_addr; 95 struct sockaddr_in *raddr = (struct sockaddr_in *)&event->remote_addr; 96 97 laddr->sin_family = AF_INET; 98 raddr->sin_family = AF_INET; 99 100 laddr->sin_port = htons(cm_node->loc_port); 101 raddr->sin_port = htons(cm_node->rem_port); 102 103 laddr->sin_addr.s_addr = htonl(cm_node->loc_addr[0]); 104 raddr->sin_addr.s_addr = htonl(cm_node->rem_addr[0]); 105 } 106 107 /** 108 * irdma_fill_sockaddr6 - fill in addr info for IPv6 connection 109 * @cm_node: connection's node 110 * @event: upper layer's cm event 111 */ 112 static inline void irdma_fill_sockaddr6(struct irdma_cm_node *cm_node, 113 struct iw_cm_event *event) 114 { 115 struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)&event->local_addr; 116 struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)&event->remote_addr; 117 118 laddr6->sin6_family = AF_INET6; 119 raddr6->sin6_family = AF_INET6; 120 121 laddr6->sin6_port = htons(cm_node->loc_port); 122 raddr6->sin6_port = htons(cm_node->rem_port); 123 124 irdma_copy_ip_htonl(laddr6->sin6_addr.in6_u.u6_addr32, 125 cm_node->loc_addr); 126 irdma_copy_ip_htonl(raddr6->sin6_addr.in6_u.u6_addr32, 127 cm_node->rem_addr); 128 } 129 130 /** 131 * irdma_get_cmevent_info - for cm event upcall 132 * @cm_node: connection's node 133 * @cm_id: upper layers cm struct for the event 134 * @event: upper layer's cm event 135 */ 136 static inline void irdma_get_cmevent_info(struct irdma_cm_node *cm_node, 137 struct iw_cm_id *cm_id, 138 struct iw_cm_event *event) 139 { 140 memcpy(&event->local_addr, &cm_id->m_local_addr, 141 sizeof(event->local_addr)); 142 memcpy(&event->remote_addr, &cm_id->m_remote_addr, 143 sizeof(event->remote_addr)); 144 if (cm_node) { 145 event->private_data = cm_node->pdata_buf; 146 event->private_data_len = (u8)cm_node->pdata.size; 147 event->ird = cm_node->ird_size; 148 event->ord = cm_node->ord_size; 149 } 150 } 151 152 /** 153 * irdma_send_cm_event - upcall cm's event handler 154 * @cm_node: connection's node 155 * @cm_id: upper layer's cm info struct 156 * @type: Event type to indicate 157 * @status: status for the event type 158 */ 159 static int irdma_send_cm_event(struct irdma_cm_node *cm_node, 160 struct iw_cm_id *cm_id, 161 enum iw_cm_event_type type, int status) 162 { 163 struct iw_cm_event event = {}; 164 165 event.event = type; 166 event.status = status; 167 trace_irdma_send_cm_event(cm_node, cm_id, type, status, 168 __builtin_return_address(0)); 169 170 ibdev_dbg(&cm_node->iwdev->ibdev, 171 "CM: cm_node %p cm_id=%p state=%d accel=%d event_type=%d status=%d\n", 172 cm_node, cm_id, cm_node->accelerated, cm_node->state, type, 173 status); 174 175 switch (type) { 176 case IW_CM_EVENT_CONNECT_REQUEST: 177 if (cm_node->ipv4) 178 irdma_fill_sockaddr4(cm_node, &event); 179 else 180 irdma_fill_sockaddr6(cm_node, &event); 181 event.provider_data = cm_node; 182 event.private_data = cm_node->pdata_buf; 183 event.private_data_len = (u8)cm_node->pdata.size; 184 event.ird = cm_node->ird_size; 185 break; 186 case IW_CM_EVENT_CONNECT_REPLY: 187 irdma_get_cmevent_info(cm_node, cm_id, &event); 188 break; 189 case IW_CM_EVENT_ESTABLISHED: 190 event.ird = cm_node->ird_size; 191 event.ord = cm_node->ord_size; 192 break; 193 case IW_CM_EVENT_DISCONNECT: 194 case IW_CM_EVENT_CLOSE: 195 /* Wait if we are in RTS but havent issued the iwcm event upcall */ 196 if (!cm_node->accelerated) 197 wait_for_completion(&cm_node->establish_comp); 198 break; 199 default: 200 return -EINVAL; 201 } 202 203 return cm_id->event_handler(cm_id, &event); 204 } 205 206 /** 207 * irdma_timer_list_prep - add connection nodes to a list to perform timer tasks 208 * @cm_core: cm's core 209 * @timer_list: a timer list to which cm_node will be selected 210 */ 211 static void irdma_timer_list_prep(struct irdma_cm_core *cm_core, 212 struct list_head *timer_list) 213 { 214 struct irdma_cm_node *cm_node; 215 int bkt; 216 217 hash_for_each_rcu(cm_core->cm_hash_tbl, bkt, cm_node, list) { 218 if ((cm_node->close_entry || cm_node->send_entry) && 219 refcount_inc_not_zero(&cm_node->refcnt)) 220 list_add(&cm_node->timer_entry, timer_list); 221 } 222 } 223 224 /** 225 * irdma_create_event - create cm event 226 * @cm_node: connection's node 227 * @type: Event type to generate 228 */ 229 static struct irdma_cm_event *irdma_create_event(struct irdma_cm_node *cm_node, 230 enum irdma_cm_event_type type) 231 { 232 struct irdma_cm_event *event; 233 234 if (!cm_node->cm_id) 235 return NULL; 236 237 event = kzalloc(sizeof(*event), GFP_ATOMIC); 238 239 if (!event) 240 return NULL; 241 242 event->type = type; 243 event->cm_node = cm_node; 244 memcpy(event->cm_info.rem_addr, cm_node->rem_addr, 245 sizeof(event->cm_info.rem_addr)); 246 memcpy(event->cm_info.loc_addr, cm_node->loc_addr, 247 sizeof(event->cm_info.loc_addr)); 248 event->cm_info.rem_port = cm_node->rem_port; 249 event->cm_info.loc_port = cm_node->loc_port; 250 event->cm_info.cm_id = cm_node->cm_id; 251 ibdev_dbg(&cm_node->iwdev->ibdev, 252 "CM: node=%p event=%p type=%u dst=%pI4 src=%pI4\n", cm_node, 253 event, type, event->cm_info.loc_addr, 254 event->cm_info.rem_addr); 255 trace_irdma_create_event(cm_node, type, __builtin_return_address(0)); 256 irdma_cm_post_event(event); 257 258 return event; 259 } 260 261 /** 262 * irdma_free_retrans_entry - free send entry 263 * @cm_node: connection's node 264 */ 265 static void irdma_free_retrans_entry(struct irdma_cm_node *cm_node) 266 { 267 struct irdma_device *iwdev = cm_node->iwdev; 268 struct irdma_timer_entry *send_entry; 269 270 send_entry = cm_node->send_entry; 271 if (!send_entry) 272 return; 273 274 cm_node->send_entry = NULL; 275 irdma_free_sqbuf(&iwdev->vsi, send_entry->sqbuf); 276 kfree(send_entry); 277 refcount_dec(&cm_node->refcnt); 278 } 279 280 /** 281 * irdma_cleanup_retrans_entry - free send entry with lock 282 * @cm_node: connection's node 283 */ 284 static void irdma_cleanup_retrans_entry(struct irdma_cm_node *cm_node) 285 { 286 unsigned long flags; 287 288 spin_lock_irqsave(&cm_node->retrans_list_lock, flags); 289 irdma_free_retrans_entry(cm_node); 290 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); 291 } 292 293 /** 294 * irdma_form_ah_cm_frame - get a free packet and build frame with address handle 295 * @cm_node: connection's node ionfo to use in frame 296 * @options: pointer to options info 297 * @hdr: pointer mpa header 298 * @pdata: pointer to private data 299 * @flags: indicates FIN or ACK 300 */ 301 static struct irdma_puda_buf *irdma_form_ah_cm_frame(struct irdma_cm_node *cm_node, 302 struct irdma_kmem_info *options, 303 struct irdma_kmem_info *hdr, 304 struct irdma_mpa_priv_info *pdata, 305 u8 flags) 306 { 307 struct irdma_puda_buf *sqbuf; 308 struct irdma_sc_vsi *vsi = &cm_node->iwdev->vsi; 309 u8 *buf; 310 struct tcphdr *tcph; 311 u16 pktsize; 312 u32 opts_len = 0; 313 u32 pd_len = 0; 314 u32 hdr_len = 0; 315 316 if (!cm_node->ah || !cm_node->ah->ah_info.ah_valid) { 317 ibdev_dbg(&cm_node->iwdev->ibdev, "CM: AH invalid\n"); 318 return NULL; 319 } 320 321 sqbuf = irdma_puda_get_bufpool(vsi->ilq); 322 if (!sqbuf) { 323 ibdev_dbg(&cm_node->iwdev->ibdev, "CM: SQ buf NULL\n"); 324 return NULL; 325 } 326 327 sqbuf->ah_id = cm_node->ah->ah_info.ah_idx; 328 buf = sqbuf->mem.va; 329 if (options) 330 opts_len = (u32)options->size; 331 332 if (hdr) 333 hdr_len = hdr->size; 334 335 if (pdata) 336 pd_len = pdata->size; 337 338 pktsize = sizeof(*tcph) + opts_len + hdr_len + pd_len; 339 340 memset(buf, 0, sizeof(*tcph)); 341 342 sqbuf->totallen = pktsize; 343 sqbuf->tcphlen = sizeof(*tcph) + opts_len; 344 sqbuf->scratch = cm_node; 345 346 tcph = (struct tcphdr *)buf; 347 buf += sizeof(*tcph); 348 349 tcph->source = htons(cm_node->loc_port); 350 tcph->dest = htons(cm_node->rem_port); 351 tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num); 352 353 if (flags & SET_ACK) { 354 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt; 355 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num); 356 tcph->ack = 1; 357 } else { 358 tcph->ack_seq = 0; 359 } 360 361 if (flags & SET_SYN) { 362 cm_node->tcp_cntxt.loc_seq_num++; 363 tcph->syn = 1; 364 } else { 365 cm_node->tcp_cntxt.loc_seq_num += hdr_len + pd_len; 366 } 367 368 if (flags & SET_FIN) { 369 cm_node->tcp_cntxt.loc_seq_num++; 370 tcph->fin = 1; 371 } 372 373 if (flags & SET_RST) 374 tcph->rst = 1; 375 376 tcph->doff = (u16)((sizeof(*tcph) + opts_len + 3) >> 2); 377 sqbuf->tcphlen = tcph->doff << 2; 378 tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd); 379 tcph->urg_ptr = 0; 380 381 if (opts_len) { 382 memcpy(buf, options->addr, opts_len); 383 buf += opts_len; 384 } 385 386 if (hdr_len) { 387 memcpy(buf, hdr->addr, hdr_len); 388 buf += hdr_len; 389 } 390 391 if (pdata && pdata->addr) 392 memcpy(buf, pdata->addr, pdata->size); 393 394 refcount_set(&sqbuf->refcount, 1); 395 396 print_hex_dump_debug("ILQ: TRANSMIT ILQ BUFFER", DUMP_PREFIX_OFFSET, 397 16, 8, sqbuf->mem.va, sqbuf->totallen, false); 398 399 return sqbuf; 400 } 401 402 /** 403 * irdma_form_uda_cm_frame - get a free packet and build frame full tcpip packet 404 * @cm_node: connection's node ionfo to use in frame 405 * @options: pointer to options info 406 * @hdr: pointer mpa header 407 * @pdata: pointer to private data 408 * @flags: indicates FIN or ACK 409 */ 410 static struct irdma_puda_buf *irdma_form_uda_cm_frame(struct irdma_cm_node *cm_node, 411 struct irdma_kmem_info *options, 412 struct irdma_kmem_info *hdr, 413 struct irdma_mpa_priv_info *pdata, 414 u8 flags) 415 { 416 struct irdma_puda_buf *sqbuf; 417 struct irdma_sc_vsi *vsi = &cm_node->iwdev->vsi; 418 u8 *buf; 419 420 struct tcphdr *tcph; 421 struct iphdr *iph; 422 struct ipv6hdr *ip6h; 423 struct ethhdr *ethh; 424 u16 pktsize; 425 u16 eth_hlen = ETH_HLEN; 426 u32 opts_len = 0; 427 u32 pd_len = 0; 428 u32 hdr_len = 0; 429 430 u16 vtag; 431 432 sqbuf = irdma_puda_get_bufpool(vsi->ilq); 433 if (!sqbuf) 434 return NULL; 435 436 buf = sqbuf->mem.va; 437 438 if (options) 439 opts_len = (u32)options->size; 440 441 if (hdr) 442 hdr_len = hdr->size; 443 444 if (pdata) 445 pd_len = pdata->size; 446 447 if (cm_node->vlan_id < VLAN_N_VID) 448 eth_hlen += 4; 449 450 if (cm_node->ipv4) 451 pktsize = sizeof(*iph) + sizeof(*tcph); 452 else 453 pktsize = sizeof(*ip6h) + sizeof(*tcph); 454 pktsize += opts_len + hdr_len + pd_len; 455 456 memset(buf, 0, eth_hlen + pktsize); 457 458 sqbuf->totallen = pktsize + eth_hlen; 459 sqbuf->maclen = eth_hlen; 460 sqbuf->tcphlen = sizeof(*tcph) + opts_len; 461 sqbuf->scratch = cm_node; 462 463 ethh = (struct ethhdr *)buf; 464 buf += eth_hlen; 465 466 if (cm_node->do_lpb) 467 sqbuf->do_lpb = true; 468 469 if (cm_node->ipv4) { 470 sqbuf->ipv4 = true; 471 472 iph = (struct iphdr *)buf; 473 buf += sizeof(*iph); 474 tcph = (struct tcphdr *)buf; 475 buf += sizeof(*tcph); 476 477 ether_addr_copy(ethh->h_dest, cm_node->rem_mac); 478 ether_addr_copy(ethh->h_source, cm_node->loc_mac); 479 if (cm_node->vlan_id < VLAN_N_VID) { 480 ((struct vlan_ethhdr *)ethh)->h_vlan_proto = 481 htons(ETH_P_8021Q); 482 vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) | 483 cm_node->vlan_id; 484 ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(vtag); 485 486 ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = 487 htons(ETH_P_IP); 488 } else { 489 ethh->h_proto = htons(ETH_P_IP); 490 } 491 492 iph->version = IPVERSION; 493 iph->ihl = 5; /* 5 * 4Byte words, IP headr len */ 494 iph->tos = cm_node->tos; 495 iph->tot_len = htons(pktsize); 496 iph->id = htons(++cm_node->tcp_cntxt.loc_id); 497 498 iph->frag_off = htons(0x4000); 499 iph->ttl = 0x40; 500 iph->protocol = IPPROTO_TCP; 501 iph->saddr = htonl(cm_node->loc_addr[0]); 502 iph->daddr = htonl(cm_node->rem_addr[0]); 503 } else { 504 sqbuf->ipv4 = false; 505 ip6h = (struct ipv6hdr *)buf; 506 buf += sizeof(*ip6h); 507 tcph = (struct tcphdr *)buf; 508 buf += sizeof(*tcph); 509 510 ether_addr_copy(ethh->h_dest, cm_node->rem_mac); 511 ether_addr_copy(ethh->h_source, cm_node->loc_mac); 512 if (cm_node->vlan_id < VLAN_N_VID) { 513 ((struct vlan_ethhdr *)ethh)->h_vlan_proto = 514 htons(ETH_P_8021Q); 515 vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) | 516 cm_node->vlan_id; 517 ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(vtag); 518 ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = 519 htons(ETH_P_IPV6); 520 } else { 521 ethh->h_proto = htons(ETH_P_IPV6); 522 } 523 ip6h->version = 6; 524 ip6h->priority = cm_node->tos >> 4; 525 ip6h->flow_lbl[0] = cm_node->tos << 4; 526 ip6h->flow_lbl[1] = 0; 527 ip6h->flow_lbl[2] = 0; 528 ip6h->payload_len = htons(pktsize - sizeof(*ip6h)); 529 ip6h->nexthdr = 6; 530 ip6h->hop_limit = 128; 531 irdma_copy_ip_htonl(ip6h->saddr.in6_u.u6_addr32, 532 cm_node->loc_addr); 533 irdma_copy_ip_htonl(ip6h->daddr.in6_u.u6_addr32, 534 cm_node->rem_addr); 535 } 536 537 tcph->source = htons(cm_node->loc_port); 538 tcph->dest = htons(cm_node->rem_port); 539 tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num); 540 541 if (flags & SET_ACK) { 542 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt; 543 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num); 544 tcph->ack = 1; 545 } else { 546 tcph->ack_seq = 0; 547 } 548 549 if (flags & SET_SYN) { 550 cm_node->tcp_cntxt.loc_seq_num++; 551 tcph->syn = 1; 552 } else { 553 cm_node->tcp_cntxt.loc_seq_num += hdr_len + pd_len; 554 } 555 556 if (flags & SET_FIN) { 557 cm_node->tcp_cntxt.loc_seq_num++; 558 tcph->fin = 1; 559 } 560 561 if (flags & SET_RST) 562 tcph->rst = 1; 563 564 tcph->doff = (u16)((sizeof(*tcph) + opts_len + 3) >> 2); 565 sqbuf->tcphlen = tcph->doff << 2; 566 tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd); 567 tcph->urg_ptr = 0; 568 569 if (opts_len) { 570 memcpy(buf, options->addr, opts_len); 571 buf += opts_len; 572 } 573 574 if (hdr_len) { 575 memcpy(buf, hdr->addr, hdr_len); 576 buf += hdr_len; 577 } 578 579 if (pdata && pdata->addr) 580 memcpy(buf, pdata->addr, pdata->size); 581 582 refcount_set(&sqbuf->refcount, 1); 583 584 print_hex_dump_debug("ILQ: TRANSMIT ILQ BUFFER", DUMP_PREFIX_OFFSET, 585 16, 8, sqbuf->mem.va, sqbuf->totallen, false); 586 return sqbuf; 587 } 588 589 /** 590 * irdma_send_reset - Send RST packet 591 * @cm_node: connection's node 592 */ 593 int irdma_send_reset(struct irdma_cm_node *cm_node) 594 { 595 struct irdma_puda_buf *sqbuf; 596 int flags = SET_RST | SET_ACK; 597 598 trace_irdma_send_reset(cm_node, 0, __builtin_return_address(0)); 599 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, NULL, NULL, 600 flags); 601 if (!sqbuf) 602 return -ENOMEM; 603 604 ibdev_dbg(&cm_node->iwdev->ibdev, 605 "CM: caller: %pS cm_node %p cm_id=%p accel=%d state=%d rem_port=0x%04x, loc_port=0x%04x rem_addr=%pI4 loc_addr=%pI4\n", 606 __builtin_return_address(0), cm_node, cm_node->cm_id, 607 cm_node->accelerated, cm_node->state, cm_node->rem_port, 608 cm_node->loc_port, cm_node->rem_addr, cm_node->loc_addr); 609 610 return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 0, 611 1); 612 } 613 614 /** 615 * irdma_active_open_err - send event for active side cm error 616 * @cm_node: connection's node 617 * @reset: Flag to send reset or not 618 */ 619 static void irdma_active_open_err(struct irdma_cm_node *cm_node, bool reset) 620 { 621 trace_irdma_active_open_err(cm_node, reset, 622 __builtin_return_address(0)); 623 irdma_cleanup_retrans_entry(cm_node); 624 cm_node->cm_core->stats_connect_errs++; 625 if (reset) { 626 ibdev_dbg(&cm_node->iwdev->ibdev, 627 "CM: cm_node=%p state=%d\n", cm_node, 628 cm_node->state); 629 refcount_inc(&cm_node->refcnt); 630 irdma_send_reset(cm_node); 631 } 632 633 cm_node->state = IRDMA_CM_STATE_CLOSED; 634 irdma_create_event(cm_node, IRDMA_CM_EVENT_ABORTED); 635 } 636 637 /** 638 * irdma_passive_open_err - handle passive side cm error 639 * @cm_node: connection's node 640 * @reset: send reset or just free cm_node 641 */ 642 static void irdma_passive_open_err(struct irdma_cm_node *cm_node, bool reset) 643 { 644 irdma_cleanup_retrans_entry(cm_node); 645 cm_node->cm_core->stats_passive_errs++; 646 cm_node->state = IRDMA_CM_STATE_CLOSED; 647 ibdev_dbg(&cm_node->iwdev->ibdev, "CM: cm_node=%p state =%d\n", 648 cm_node, cm_node->state); 649 trace_irdma_passive_open_err(cm_node, reset, 650 __builtin_return_address(0)); 651 if (reset) 652 irdma_send_reset(cm_node); 653 else 654 irdma_rem_ref_cm_node(cm_node); 655 } 656 657 /** 658 * irdma_event_connect_error - to create connect error event 659 * @event: cm information for connect event 660 */ 661 static void irdma_event_connect_error(struct irdma_cm_event *event) 662 { 663 struct irdma_qp *iwqp; 664 struct iw_cm_id *cm_id; 665 666 cm_id = event->cm_node->cm_id; 667 if (!cm_id) 668 return; 669 670 iwqp = cm_id->provider_data; 671 672 if (!iwqp || !iwqp->iwdev) 673 return; 674 675 iwqp->cm_id = NULL; 676 cm_id->provider_data = NULL; 677 irdma_send_cm_event(event->cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 678 -ECONNRESET); 679 irdma_rem_ref_cm_node(event->cm_node); 680 } 681 682 /** 683 * irdma_process_options - process options from TCP header 684 * @cm_node: connection's node 685 * @optionsloc: point to start of options 686 * @optionsize: size of all options 687 * @syn_pkt: flag if syn packet 688 */ 689 static int irdma_process_options(struct irdma_cm_node *cm_node, u8 *optionsloc, 690 u32 optionsize, u32 syn_pkt) 691 { 692 u32 tmp; 693 u32 offset = 0; 694 union all_known_options *all_options; 695 char got_mss_option = 0; 696 697 while (offset < optionsize) { 698 all_options = (union all_known_options *)(optionsloc + offset); 699 switch (all_options->base.optionnum) { 700 case OPTION_NUM_EOL: 701 offset = optionsize; 702 break; 703 case OPTION_NUM_NONE: 704 offset += 1; 705 continue; 706 case OPTION_NUM_MSS: 707 ibdev_dbg(&cm_node->iwdev->ibdev, 708 "CM: MSS Length: %d Offset: %d Size: %d\n", 709 all_options->mss.len, offset, optionsize); 710 got_mss_option = 1; 711 if (all_options->mss.len != 4) 712 return -EINVAL; 713 tmp = ntohs(all_options->mss.mss); 714 if ((cm_node->ipv4 && 715 (tmp + IRDMA_MTU_TO_MSS_IPV4) < IRDMA_MIN_MTU_IPV4) || 716 (!cm_node->ipv4 && 717 (tmp + IRDMA_MTU_TO_MSS_IPV6) < IRDMA_MIN_MTU_IPV6)) 718 return -EINVAL; 719 if (tmp < cm_node->tcp_cntxt.mss) 720 cm_node->tcp_cntxt.mss = tmp; 721 break; 722 case OPTION_NUM_WINDOW_SCALE: 723 cm_node->tcp_cntxt.snd_wscale = 724 all_options->windowscale.shiftcount; 725 break; 726 default: 727 ibdev_dbg(&cm_node->iwdev->ibdev, 728 "CM: Unsupported TCP Option: %x\n", 729 all_options->base.optionnum); 730 break; 731 } 732 offset += all_options->base.len; 733 } 734 if (!got_mss_option && syn_pkt) 735 cm_node->tcp_cntxt.mss = IRDMA_CM_DEFAULT_MSS; 736 737 return 0; 738 } 739 740 /** 741 * irdma_handle_tcp_options - setup TCP context info after parsing TCP options 742 * @cm_node: connection's node 743 * @tcph: pointer tcp header 744 * @optionsize: size of options rcvd 745 * @passive: active or passive flag 746 */ 747 static int irdma_handle_tcp_options(struct irdma_cm_node *cm_node, 748 struct tcphdr *tcph, int optionsize, 749 int passive) 750 { 751 u8 *optionsloc = (u8 *)&tcph[1]; 752 int ret; 753 754 if (optionsize) { 755 ret = irdma_process_options(cm_node, optionsloc, optionsize, 756 (u32)tcph->syn); 757 if (ret) { 758 ibdev_dbg(&cm_node->iwdev->ibdev, 759 "CM: Node %p, Sending Reset\n", cm_node); 760 if (passive) 761 irdma_passive_open_err(cm_node, true); 762 else 763 irdma_active_open_err(cm_node, true); 764 return ret; 765 } 766 } 767 768 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) 769 << cm_node->tcp_cntxt.snd_wscale; 770 771 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd) 772 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd; 773 774 return 0; 775 } 776 777 /** 778 * irdma_build_mpa_v1 - build a MPA V1 frame 779 * @cm_node: connection's node 780 * @start_addr: address where to build frame 781 * @mpa_key: to do read0 or write0 782 */ 783 static void irdma_build_mpa_v1(struct irdma_cm_node *cm_node, void *start_addr, 784 u8 mpa_key) 785 { 786 struct ietf_mpa_v1 *mpa_frame = start_addr; 787 788 switch (mpa_key) { 789 case MPA_KEY_REQUEST: 790 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE); 791 break; 792 case MPA_KEY_REPLY: 793 memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE); 794 break; 795 default: 796 break; 797 } 798 mpa_frame->flags = IETF_MPA_FLAGS_CRC; 799 mpa_frame->rev = cm_node->mpa_frame_rev; 800 mpa_frame->priv_data_len = htons(cm_node->pdata.size); 801 } 802 803 /** 804 * irdma_build_mpa_v2 - build a MPA V2 frame 805 * @cm_node: connection's node 806 * @start_addr: buffer start address 807 * @mpa_key: to do read0 or write0 808 */ 809 static void irdma_build_mpa_v2(struct irdma_cm_node *cm_node, void *start_addr, 810 u8 mpa_key) 811 { 812 struct ietf_mpa_v2 *mpa_frame = start_addr; 813 struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg; 814 u16 ctrl_ird, ctrl_ord; 815 816 /* initialize the upper 5 bytes of the frame */ 817 irdma_build_mpa_v1(cm_node, start_addr, mpa_key); 818 mpa_frame->flags |= IETF_MPA_V2_FLAG; 819 if (cm_node->iwdev->iw_ooo) { 820 mpa_frame->flags |= IETF_MPA_FLAGS_MARKERS; 821 cm_node->rcv_mark_en = true; 822 } 823 mpa_frame->priv_data_len = cpu_to_be16(be16_to_cpu(mpa_frame->priv_data_len) + 824 IETF_RTR_MSG_SIZE); 825 826 /* initialize RTR msg */ 827 if (cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) { 828 ctrl_ird = IETF_NO_IRD_ORD; 829 ctrl_ord = IETF_NO_IRD_ORD; 830 } else { 831 ctrl_ird = (cm_node->ird_size > IETF_NO_IRD_ORD) ? 832 IETF_NO_IRD_ORD : 833 cm_node->ird_size; 834 ctrl_ord = (cm_node->ord_size > IETF_NO_IRD_ORD) ? 835 IETF_NO_IRD_ORD : 836 cm_node->ord_size; 837 } 838 ctrl_ird |= IETF_PEER_TO_PEER; 839 840 switch (mpa_key) { 841 case MPA_KEY_REQUEST: 842 ctrl_ord |= IETF_RDMA0_WRITE; 843 ctrl_ord |= IETF_RDMA0_READ; 844 break; 845 case MPA_KEY_REPLY: 846 switch (cm_node->send_rdma0_op) { 847 case SEND_RDMA_WRITE_ZERO: 848 ctrl_ord |= IETF_RDMA0_WRITE; 849 break; 850 case SEND_RDMA_READ_ZERO: 851 ctrl_ord |= IETF_RDMA0_READ; 852 break; 853 } 854 break; 855 default: 856 break; 857 } 858 rtr_msg->ctrl_ird = htons(ctrl_ird); 859 rtr_msg->ctrl_ord = htons(ctrl_ord); 860 } 861 862 /** 863 * irdma_cm_build_mpa_frame - build mpa frame for mpa version 1 or version 2 864 * @cm_node: connection's node 865 * @mpa: mpa: data buffer 866 * @mpa_key: to do read0 or write0 867 */ 868 static int irdma_cm_build_mpa_frame(struct irdma_cm_node *cm_node, 869 struct irdma_kmem_info *mpa, u8 mpa_key) 870 { 871 int hdr_len = 0; 872 873 switch (cm_node->mpa_frame_rev) { 874 case IETF_MPA_V1: 875 hdr_len = sizeof(struct ietf_mpa_v1); 876 irdma_build_mpa_v1(cm_node, mpa->addr, mpa_key); 877 break; 878 case IETF_MPA_V2: 879 hdr_len = sizeof(struct ietf_mpa_v2); 880 irdma_build_mpa_v2(cm_node, mpa->addr, mpa_key); 881 break; 882 default: 883 break; 884 } 885 886 return hdr_len; 887 } 888 889 /** 890 * irdma_send_mpa_request - active node send mpa request to passive node 891 * @cm_node: connection's node 892 */ 893 static int irdma_send_mpa_request(struct irdma_cm_node *cm_node) 894 { 895 struct irdma_puda_buf *sqbuf; 896 897 cm_node->mpa_hdr.addr = &cm_node->mpa_v2_frame; 898 cm_node->mpa_hdr.size = irdma_cm_build_mpa_frame(cm_node, 899 &cm_node->mpa_hdr, 900 MPA_KEY_REQUEST); 901 if (!cm_node->mpa_hdr.size) { 902 ibdev_dbg(&cm_node->iwdev->ibdev, 903 "CM: mpa size = %d\n", cm_node->mpa_hdr.size); 904 return -EINVAL; 905 } 906 907 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, 908 &cm_node->mpa_hdr, 909 &cm_node->pdata, SET_ACK); 910 if (!sqbuf) 911 return -ENOMEM; 912 913 return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 1, 914 0); 915 } 916 917 /** 918 * irdma_send_mpa_reject - 919 * @cm_node: connection's node 920 * @pdata: reject data for connection 921 * @plen: length of reject data 922 */ 923 static int irdma_send_mpa_reject(struct irdma_cm_node *cm_node, 924 const void *pdata, u8 plen) 925 { 926 struct irdma_puda_buf *sqbuf; 927 struct irdma_mpa_priv_info priv_info; 928 929 cm_node->mpa_hdr.addr = &cm_node->mpa_v2_frame; 930 cm_node->mpa_hdr.size = irdma_cm_build_mpa_frame(cm_node, 931 &cm_node->mpa_hdr, 932 MPA_KEY_REPLY); 933 934 cm_node->mpa_frame.flags |= IETF_MPA_FLAGS_REJECT; 935 priv_info.addr = pdata; 936 priv_info.size = plen; 937 938 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, 939 &cm_node->mpa_hdr, &priv_info, 940 SET_ACK | SET_FIN); 941 if (!sqbuf) 942 return -ENOMEM; 943 944 cm_node->state = IRDMA_CM_STATE_FIN_WAIT1; 945 946 return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 1, 947 0); 948 } 949 950 /** 951 * irdma_negotiate_mpa_v2_ird_ord - negotiate MPAv2 IRD/ORD 952 * @cm_node: connection's node 953 * @buf: Data pointer 954 */ 955 static int irdma_negotiate_mpa_v2_ird_ord(struct irdma_cm_node *cm_node, 956 u8 *buf) 957 { 958 struct ietf_mpa_v2 *mpa_v2_frame; 959 struct ietf_rtr_msg *rtr_msg; 960 u16 ird_size; 961 u16 ord_size; 962 u16 ctrl_ord; 963 u16 ctrl_ird; 964 965 mpa_v2_frame = (struct ietf_mpa_v2 *)buf; 966 rtr_msg = &mpa_v2_frame->rtr_msg; 967 968 /* parse rtr message */ 969 ctrl_ord = ntohs(rtr_msg->ctrl_ord); 970 ctrl_ird = ntohs(rtr_msg->ctrl_ird); 971 ird_size = ctrl_ird & IETF_NO_IRD_ORD; 972 ord_size = ctrl_ord & IETF_NO_IRD_ORD; 973 974 if (!(ctrl_ird & IETF_PEER_TO_PEER)) 975 return -EOPNOTSUPP; 976 977 if (ird_size == IETF_NO_IRD_ORD || ord_size == IETF_NO_IRD_ORD) { 978 cm_node->mpav2_ird_ord = IETF_NO_IRD_ORD; 979 goto negotiate_done; 980 } 981 982 if (cm_node->state != IRDMA_CM_STATE_MPAREQ_SENT) { 983 /* responder */ 984 if (!ord_size && (ctrl_ord & IETF_RDMA0_READ)) 985 cm_node->ird_size = 1; 986 if (cm_node->ord_size > ird_size) 987 cm_node->ord_size = ird_size; 988 } else { 989 /* initiator */ 990 if (!ird_size && (ctrl_ord & IETF_RDMA0_READ)) 991 /* Remote peer doesn't support RDMA0_READ */ 992 return -EOPNOTSUPP; 993 994 if (cm_node->ord_size > ird_size) 995 cm_node->ord_size = ird_size; 996 997 if (cm_node->ird_size < ord_size) 998 /* no resources available */ 999 return -EINVAL; 1000 } 1001 1002 negotiate_done: 1003 if (ctrl_ord & IETF_RDMA0_READ) 1004 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO; 1005 else if (ctrl_ord & IETF_RDMA0_WRITE) 1006 cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO; 1007 else 1008 /* Not supported RDMA0 operation */ 1009 return -EOPNOTSUPP; 1010 1011 ibdev_dbg(&cm_node->iwdev->ibdev, 1012 "CM: MPAV2 Negotiated ORD: %d, IRD: %d\n", 1013 cm_node->ord_size, cm_node->ird_size); 1014 trace_irdma_negotiate_mpa_v2(cm_node); 1015 return 0; 1016 } 1017 1018 /** 1019 * irdma_parse_mpa - process an IETF MPA frame 1020 * @cm_node: connection's node 1021 * @buf: Data pointer 1022 * @type: to return accept or reject 1023 * @len: Len of mpa buffer 1024 */ 1025 static int irdma_parse_mpa(struct irdma_cm_node *cm_node, u8 *buf, u32 *type, 1026 u32 len) 1027 { 1028 struct ietf_mpa_v1 *mpa_frame; 1029 int mpa_hdr_len, priv_data_len, ret; 1030 1031 *type = IRDMA_MPA_REQUEST_ACCEPT; 1032 1033 if (len < sizeof(struct ietf_mpa_v1)) { 1034 ibdev_dbg(&cm_node->iwdev->ibdev, 1035 "CM: ietf buffer small (%x)\n", len); 1036 return -EINVAL; 1037 } 1038 1039 mpa_frame = (struct ietf_mpa_v1 *)buf; 1040 mpa_hdr_len = sizeof(struct ietf_mpa_v1); 1041 priv_data_len = ntohs(mpa_frame->priv_data_len); 1042 1043 if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) { 1044 ibdev_dbg(&cm_node->iwdev->ibdev, 1045 "CM: private_data too big %d\n", priv_data_len); 1046 return -EOVERFLOW; 1047 } 1048 1049 if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) { 1050 ibdev_dbg(&cm_node->iwdev->ibdev, 1051 "CM: unsupported mpa rev = %d\n", mpa_frame->rev); 1052 return -EINVAL; 1053 } 1054 1055 if (mpa_frame->rev > cm_node->mpa_frame_rev) { 1056 ibdev_dbg(&cm_node->iwdev->ibdev, "CM: rev %d\n", 1057 mpa_frame->rev); 1058 return -EINVAL; 1059 } 1060 1061 cm_node->mpa_frame_rev = mpa_frame->rev; 1062 if (cm_node->state != IRDMA_CM_STATE_MPAREQ_SENT) { 1063 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, 1064 IETF_MPA_KEY_SIZE)) { 1065 ibdev_dbg(&cm_node->iwdev->ibdev, 1066 "CM: Unexpected MPA Key received\n"); 1067 return -EINVAL; 1068 } 1069 } else { 1070 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, 1071 IETF_MPA_KEY_SIZE)) { 1072 ibdev_dbg(&cm_node->iwdev->ibdev, 1073 "CM: Unexpected MPA Key received\n"); 1074 return -EINVAL; 1075 } 1076 } 1077 1078 if (priv_data_len + mpa_hdr_len > len) { 1079 ibdev_dbg(&cm_node->iwdev->ibdev, 1080 "CM: ietf buffer len(%x + %x != %x)\n", 1081 priv_data_len, mpa_hdr_len, len); 1082 return -EOVERFLOW; 1083 } 1084 1085 if (len > IRDMA_MAX_CM_BUF) { 1086 ibdev_dbg(&cm_node->iwdev->ibdev, 1087 "CM: ietf buffer large len = %d\n", len); 1088 return -EOVERFLOW; 1089 } 1090 1091 switch (mpa_frame->rev) { 1092 case IETF_MPA_V2: 1093 mpa_hdr_len += IETF_RTR_MSG_SIZE; 1094 ret = irdma_negotiate_mpa_v2_ird_ord(cm_node, buf); 1095 if (ret) 1096 return ret; 1097 break; 1098 case IETF_MPA_V1: 1099 default: 1100 break; 1101 } 1102 1103 memcpy(cm_node->pdata_buf, buf + mpa_hdr_len, priv_data_len); 1104 cm_node->pdata.size = priv_data_len; 1105 1106 if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT) 1107 *type = IRDMA_MPA_REQUEST_REJECT; 1108 1109 if (mpa_frame->flags & IETF_MPA_FLAGS_MARKERS) 1110 cm_node->snd_mark_en = true; 1111 1112 return 0; 1113 } 1114 1115 /** 1116 * irdma_schedule_cm_timer 1117 * @cm_node: connection's node 1118 * @sqbuf: buffer to send 1119 * @type: if it is send or close 1120 * @send_retrans: if rexmits to be done 1121 * @close_when_complete: is cm_node to be removed 1122 * 1123 * note - cm_node needs to be protected before calling this. Encase in: 1124 * irdma_rem_ref_cm_node(cm_core, cm_node); 1125 * irdma_schedule_cm_timer(...) 1126 * refcount_inc(&cm_node->refcnt); 1127 */ 1128 int irdma_schedule_cm_timer(struct irdma_cm_node *cm_node, 1129 struct irdma_puda_buf *sqbuf, 1130 enum irdma_timer_type type, int send_retrans, 1131 int close_when_complete) 1132 { 1133 struct irdma_sc_vsi *vsi = &cm_node->iwdev->vsi; 1134 struct irdma_cm_core *cm_core = cm_node->cm_core; 1135 struct irdma_timer_entry *new_send; 1136 u32 was_timer_set; 1137 unsigned long flags; 1138 1139 new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC); 1140 if (!new_send) { 1141 if (type != IRDMA_TIMER_TYPE_CLOSE) 1142 irdma_free_sqbuf(vsi, sqbuf); 1143 return -ENOMEM; 1144 } 1145 1146 new_send->retrycount = IRDMA_DEFAULT_RETRYS; 1147 new_send->retranscount = IRDMA_DEFAULT_RETRANS; 1148 new_send->sqbuf = sqbuf; 1149 new_send->timetosend = jiffies; 1150 new_send->type = type; 1151 new_send->send_retrans = send_retrans; 1152 new_send->close_when_complete = close_when_complete; 1153 1154 if (type == IRDMA_TIMER_TYPE_CLOSE) { 1155 new_send->timetosend += (HZ / 10); 1156 if (cm_node->close_entry) { 1157 kfree(new_send); 1158 ibdev_dbg(&cm_node->iwdev->ibdev, 1159 "CM: already close entry\n"); 1160 return -EINVAL; 1161 } 1162 1163 cm_node->close_entry = new_send; 1164 } else { /* type == IRDMA_TIMER_TYPE_SEND */ 1165 spin_lock_irqsave(&cm_node->retrans_list_lock, flags); 1166 cm_node->send_entry = new_send; 1167 refcount_inc(&cm_node->refcnt); 1168 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); 1169 new_send->timetosend = jiffies + IRDMA_RETRY_TIMEOUT; 1170 1171 refcount_inc(&sqbuf->refcount); 1172 irdma_puda_send_buf(vsi->ilq, sqbuf); 1173 if (!send_retrans) { 1174 irdma_cleanup_retrans_entry(cm_node); 1175 if (close_when_complete) 1176 irdma_rem_ref_cm_node(cm_node); 1177 return 0; 1178 } 1179 } 1180 1181 spin_lock_irqsave(&cm_core->ht_lock, flags); 1182 was_timer_set = timer_pending(&cm_core->tcp_timer); 1183 1184 if (!was_timer_set) { 1185 cm_core->tcp_timer.expires = new_send->timetosend; 1186 add_timer(&cm_core->tcp_timer); 1187 } 1188 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 1189 1190 return 0; 1191 } 1192 1193 /** 1194 * irdma_retrans_expired - Could not rexmit the packet 1195 * @cm_node: connection's node 1196 */ 1197 static void irdma_retrans_expired(struct irdma_cm_node *cm_node) 1198 { 1199 enum irdma_cm_node_state state = cm_node->state; 1200 1201 cm_node->state = IRDMA_CM_STATE_CLOSED; 1202 switch (state) { 1203 case IRDMA_CM_STATE_SYN_RCVD: 1204 case IRDMA_CM_STATE_CLOSING: 1205 irdma_rem_ref_cm_node(cm_node); 1206 break; 1207 case IRDMA_CM_STATE_FIN_WAIT1: 1208 case IRDMA_CM_STATE_LAST_ACK: 1209 irdma_send_reset(cm_node); 1210 break; 1211 default: 1212 refcount_inc(&cm_node->refcnt); 1213 irdma_send_reset(cm_node); 1214 irdma_create_event(cm_node, IRDMA_CM_EVENT_ABORTED); 1215 break; 1216 } 1217 } 1218 1219 /** 1220 * irdma_handle_close_entry - for handling retry/timeouts 1221 * @cm_node: connection's node 1222 * @rem_node: flag for remove cm_node 1223 */ 1224 static void irdma_handle_close_entry(struct irdma_cm_node *cm_node, 1225 u32 rem_node) 1226 { 1227 struct irdma_timer_entry *close_entry = cm_node->close_entry; 1228 struct irdma_qp *iwqp; 1229 unsigned long flags; 1230 1231 if (!close_entry) 1232 return; 1233 iwqp = (struct irdma_qp *)close_entry->sqbuf; 1234 if (iwqp) { 1235 spin_lock_irqsave(&iwqp->lock, flags); 1236 if (iwqp->cm_id) { 1237 iwqp->hw_tcp_state = IRDMA_TCP_STATE_CLOSED; 1238 iwqp->hw_iwarp_state = IRDMA_QP_STATE_ERROR; 1239 iwqp->last_aeq = IRDMA_AE_RESET_SENT; 1240 iwqp->ibqp_state = IB_QPS_ERR; 1241 spin_unlock_irqrestore(&iwqp->lock, flags); 1242 irdma_cm_disconn(iwqp); 1243 } else { 1244 spin_unlock_irqrestore(&iwqp->lock, flags); 1245 } 1246 } else if (rem_node) { 1247 /* TIME_WAIT state */ 1248 irdma_rem_ref_cm_node(cm_node); 1249 } 1250 1251 kfree(close_entry); 1252 cm_node->close_entry = NULL; 1253 } 1254 1255 /** 1256 * irdma_cm_timer_tick - system's timer expired callback 1257 * @t: Pointer to timer_list 1258 */ 1259 static void irdma_cm_timer_tick(struct timer_list *t) 1260 { 1261 unsigned long nexttimeout = jiffies + IRDMA_LONG_TIME; 1262 struct irdma_cm_node *cm_node; 1263 struct irdma_timer_entry *send_entry, *close_entry; 1264 struct list_head *list_core_temp; 1265 struct list_head *list_node; 1266 struct irdma_cm_core *cm_core = timer_container_of(cm_core, t, 1267 tcp_timer); 1268 struct irdma_sc_vsi *vsi; 1269 u32 settimer = 0; 1270 unsigned long timetosend; 1271 unsigned long flags; 1272 struct list_head timer_list; 1273 1274 INIT_LIST_HEAD(&timer_list); 1275 1276 rcu_read_lock(); 1277 irdma_timer_list_prep(cm_core, &timer_list); 1278 rcu_read_unlock(); 1279 1280 list_for_each_safe (list_node, list_core_temp, &timer_list) { 1281 cm_node = container_of(list_node, struct irdma_cm_node, 1282 timer_entry); 1283 close_entry = cm_node->close_entry; 1284 1285 if (close_entry) { 1286 if (time_after(close_entry->timetosend, jiffies)) { 1287 if (nexttimeout > close_entry->timetosend || 1288 !settimer) { 1289 nexttimeout = close_entry->timetosend; 1290 settimer = 1; 1291 } 1292 } else { 1293 irdma_handle_close_entry(cm_node, 1); 1294 } 1295 } 1296 1297 spin_lock_irqsave(&cm_node->retrans_list_lock, flags); 1298 1299 send_entry = cm_node->send_entry; 1300 if (!send_entry) 1301 goto done; 1302 if (time_after(send_entry->timetosend, jiffies)) { 1303 if (cm_node->state != IRDMA_CM_STATE_OFFLOADED) { 1304 if (nexttimeout > send_entry->timetosend || 1305 !settimer) { 1306 nexttimeout = send_entry->timetosend; 1307 settimer = 1; 1308 } 1309 } else { 1310 irdma_free_retrans_entry(cm_node); 1311 } 1312 goto done; 1313 } 1314 1315 if (cm_node->state == IRDMA_CM_STATE_OFFLOADED || 1316 cm_node->state == IRDMA_CM_STATE_CLOSED) { 1317 irdma_free_retrans_entry(cm_node); 1318 goto done; 1319 } 1320 1321 if (!send_entry->retranscount || !send_entry->retrycount) { 1322 irdma_free_retrans_entry(cm_node); 1323 1324 spin_unlock_irqrestore(&cm_node->retrans_list_lock, 1325 flags); 1326 irdma_retrans_expired(cm_node); 1327 cm_node->state = IRDMA_CM_STATE_CLOSED; 1328 spin_lock_irqsave(&cm_node->retrans_list_lock, flags); 1329 goto done; 1330 } 1331 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); 1332 1333 vsi = &cm_node->iwdev->vsi; 1334 if (!cm_node->ack_rcvd) { 1335 refcount_inc(&send_entry->sqbuf->refcount); 1336 irdma_puda_send_buf(vsi->ilq, send_entry->sqbuf); 1337 cm_node->cm_core->stats_pkt_retrans++; 1338 } 1339 1340 spin_lock_irqsave(&cm_node->retrans_list_lock, flags); 1341 if (send_entry->send_retrans) { 1342 send_entry->retranscount--; 1343 timetosend = (IRDMA_RETRY_TIMEOUT << 1344 (IRDMA_DEFAULT_RETRANS - 1345 send_entry->retranscount)); 1346 1347 send_entry->timetosend = jiffies + 1348 min(timetosend, IRDMA_MAX_TIMEOUT); 1349 if (nexttimeout > send_entry->timetosend || !settimer) { 1350 nexttimeout = send_entry->timetosend; 1351 settimer = 1; 1352 } 1353 } else { 1354 int close_when_complete; 1355 1356 close_when_complete = send_entry->close_when_complete; 1357 irdma_free_retrans_entry(cm_node); 1358 if (close_when_complete) 1359 irdma_rem_ref_cm_node(cm_node); 1360 } 1361 done: 1362 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); 1363 irdma_rem_ref_cm_node(cm_node); 1364 } 1365 1366 if (settimer) { 1367 spin_lock_irqsave(&cm_core->ht_lock, flags); 1368 if (!timer_pending(&cm_core->tcp_timer)) { 1369 cm_core->tcp_timer.expires = nexttimeout; 1370 add_timer(&cm_core->tcp_timer); 1371 } 1372 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 1373 } 1374 } 1375 1376 /** 1377 * irdma_send_syn - send SYN packet 1378 * @cm_node: connection's node 1379 * @sendack: flag to set ACK bit or not 1380 */ 1381 int irdma_send_syn(struct irdma_cm_node *cm_node, u32 sendack) 1382 { 1383 struct irdma_puda_buf *sqbuf; 1384 int flags = SET_SYN; 1385 char optionsbuf[sizeof(struct option_mss) + 1386 sizeof(struct option_windowscale) + 1387 sizeof(struct option_base) + TCP_OPTIONS_PADDING]; 1388 struct irdma_kmem_info opts; 1389 int optionssize = 0; 1390 /* Sending MSS option */ 1391 union all_known_options *options; 1392 1393 opts.addr = optionsbuf; 1394 if (!cm_node) 1395 return -EINVAL; 1396 1397 options = (union all_known_options *)&optionsbuf[optionssize]; 1398 options->mss.optionnum = OPTION_NUM_MSS; 1399 options->mss.len = sizeof(struct option_mss); 1400 options->mss.mss = htons(cm_node->tcp_cntxt.mss); 1401 optionssize += sizeof(struct option_mss); 1402 1403 options = (union all_known_options *)&optionsbuf[optionssize]; 1404 options->windowscale.optionnum = OPTION_NUM_WINDOW_SCALE; 1405 options->windowscale.len = sizeof(struct option_windowscale); 1406 options->windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale; 1407 optionssize += sizeof(struct option_windowscale); 1408 options = (union all_known_options *)&optionsbuf[optionssize]; 1409 options->eol = OPTION_NUM_EOL; 1410 optionssize += 1; 1411 1412 if (sendack) 1413 flags |= SET_ACK; 1414 1415 opts.size = optionssize; 1416 1417 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, &opts, NULL, NULL, 1418 flags); 1419 if (!sqbuf) 1420 return -ENOMEM; 1421 1422 return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 1, 1423 0); 1424 } 1425 1426 /** 1427 * irdma_send_ack - Send ACK packet 1428 * @cm_node: connection's node 1429 */ 1430 void irdma_send_ack(struct irdma_cm_node *cm_node) 1431 { 1432 struct irdma_puda_buf *sqbuf; 1433 struct irdma_sc_vsi *vsi = &cm_node->iwdev->vsi; 1434 1435 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, NULL, NULL, 1436 SET_ACK); 1437 if (sqbuf) 1438 irdma_puda_send_buf(vsi->ilq, sqbuf); 1439 } 1440 1441 /** 1442 * irdma_send_fin - Send FIN pkt 1443 * @cm_node: connection's node 1444 */ 1445 static int irdma_send_fin(struct irdma_cm_node *cm_node) 1446 { 1447 struct irdma_puda_buf *sqbuf; 1448 1449 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, NULL, NULL, 1450 SET_ACK | SET_FIN); 1451 if (!sqbuf) 1452 return -ENOMEM; 1453 1454 return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 1, 1455 0); 1456 } 1457 1458 /** 1459 * irdma_find_listener - find a cm node listening on this addr-port pair 1460 * @cm_core: cm's core 1461 * @dst_addr: listener ip addr 1462 * @ipv4: flag indicating IPv4 when true 1463 * @dst_port: listener tcp port num 1464 * @vlan_id: virtual LAN ID 1465 * @listener_state: state to match with listen node's 1466 */ 1467 static struct irdma_cm_listener * 1468 irdma_find_listener(struct irdma_cm_core *cm_core, u32 *dst_addr, bool ipv4, 1469 u16 dst_port, u16 vlan_id, 1470 enum irdma_cm_listener_state listener_state) 1471 { 1472 struct irdma_cm_listener *listen_node; 1473 static const u32 ip_zero[4] = { 0, 0, 0, 0 }; 1474 u32 listen_addr[4]; 1475 u16 listen_port; 1476 unsigned long flags; 1477 1478 /* walk list and find cm_node associated with this session ID */ 1479 spin_lock_irqsave(&cm_core->listen_list_lock, flags); 1480 list_for_each_entry (listen_node, &cm_core->listen_list, list) { 1481 memcpy(listen_addr, listen_node->loc_addr, sizeof(listen_addr)); 1482 listen_port = listen_node->loc_port; 1483 if (listen_node->ipv4 != ipv4 || listen_port != dst_port || 1484 !(listener_state & listen_node->listener_state)) 1485 continue; 1486 /* compare node pair, return node handle if a match */ 1487 if (!memcmp(listen_addr, ip_zero, sizeof(listen_addr)) || 1488 (!memcmp(listen_addr, dst_addr, sizeof(listen_addr)) && 1489 vlan_id == listen_node->vlan_id)) { 1490 refcount_inc(&listen_node->refcnt); 1491 spin_unlock_irqrestore(&cm_core->listen_list_lock, 1492 flags); 1493 trace_irdma_find_listener(listen_node); 1494 return listen_node; 1495 } 1496 } 1497 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); 1498 1499 return NULL; 1500 } 1501 1502 /** 1503 * irdma_del_multiple_qhash - Remove qhash and child listens 1504 * @iwdev: iWarp device 1505 * @cm_info: CM info for parent listen node 1506 * @cm_parent_listen_node: The parent listen node 1507 */ 1508 static int irdma_del_multiple_qhash(struct irdma_device *iwdev, 1509 struct irdma_cm_info *cm_info, 1510 struct irdma_cm_listener *cm_parent_listen_node) 1511 { 1512 struct irdma_cm_listener *child_listen_node; 1513 struct list_head *pos, *tpos; 1514 unsigned long flags; 1515 int ret = -EINVAL; 1516 1517 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags); 1518 list_for_each_safe (pos, tpos, 1519 &cm_parent_listen_node->child_listen_list) { 1520 child_listen_node = list_entry(pos, struct irdma_cm_listener, 1521 child_listen_list); 1522 if (child_listen_node->ipv4) 1523 ibdev_dbg(&iwdev->ibdev, 1524 "CM: removing child listen for IP=%pI4, port=%d, vlan=%d\n", 1525 child_listen_node->loc_addr, 1526 child_listen_node->loc_port, 1527 child_listen_node->vlan_id); 1528 else 1529 ibdev_dbg(&iwdev->ibdev, 1530 "CM: removing child listen for IP=%pI6, port=%d, vlan=%d\n", 1531 child_listen_node->loc_addr, 1532 child_listen_node->loc_port, 1533 child_listen_node->vlan_id); 1534 trace_irdma_del_multiple_qhash(child_listen_node); 1535 list_del(pos); 1536 memcpy(cm_info->loc_addr, child_listen_node->loc_addr, 1537 sizeof(cm_info->loc_addr)); 1538 cm_info->vlan_id = child_listen_node->vlan_id; 1539 if (child_listen_node->qhash_set) { 1540 ret = irdma_manage_qhash(iwdev, cm_info, 1541 IRDMA_QHASH_TYPE_TCP_SYN, 1542 IRDMA_QHASH_MANAGE_TYPE_DELETE, 1543 NULL, false); 1544 child_listen_node->qhash_set = false; 1545 } else { 1546 ret = 0; 1547 } 1548 ibdev_dbg(&iwdev->ibdev, 1549 "CM: Child listen node freed = %p\n", 1550 child_listen_node); 1551 kfree(child_listen_node); 1552 cm_parent_listen_node->cm_core->stats_listen_nodes_destroyed++; 1553 } 1554 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); 1555 1556 return ret; 1557 } 1558 1559 static u8 irdma_iw_get_vlan_prio(u32 *loc_addr, u8 prio, bool ipv4) 1560 { 1561 struct net_device *ndev = NULL; 1562 1563 rcu_read_lock(); 1564 if (ipv4) { 1565 ndev = ip_dev_find(&init_net, htonl(loc_addr[0])); 1566 } else if (IS_ENABLED(CONFIG_IPV6)) { 1567 struct net_device *ip_dev; 1568 struct in6_addr laddr6; 1569 1570 irdma_copy_ip_htonl(laddr6.in6_u.u6_addr32, loc_addr); 1571 1572 for_each_netdev_rcu (&init_net, ip_dev) { 1573 if (ipv6_chk_addr(&init_net, &laddr6, ip_dev, 1)) { 1574 ndev = ip_dev; 1575 break; 1576 } 1577 } 1578 } 1579 1580 if (!ndev) 1581 goto done; 1582 if (is_vlan_dev(ndev)) 1583 prio = (vlan_dev_get_egress_qos_mask(ndev, prio) & VLAN_PRIO_MASK) 1584 >> VLAN_PRIO_SHIFT; 1585 if (ipv4) 1586 dev_put(ndev); 1587 1588 done: 1589 rcu_read_unlock(); 1590 1591 return prio; 1592 } 1593 1594 /** 1595 * irdma_get_vlan_mac_ipv6 - Gets the vlan and mac 1596 * @addr: local IPv6 address 1597 * @vlan_id: vlan id for the given IPv6 address 1598 * @mac: mac address for the given IPv6 address 1599 * 1600 * Returns the vlan id and mac for an IPv6 address. 1601 */ 1602 void irdma_get_vlan_mac_ipv6(u32 *addr, u16 *vlan_id, u8 *mac) 1603 { 1604 struct net_device *ip_dev = NULL; 1605 struct in6_addr laddr6; 1606 1607 if (!IS_ENABLED(CONFIG_IPV6)) 1608 return; 1609 1610 irdma_copy_ip_htonl(laddr6.in6_u.u6_addr32, addr); 1611 if (vlan_id) 1612 *vlan_id = 0xFFFF; /* Match rdma_vlan_dev_vlan_id() */ 1613 if (mac) 1614 eth_zero_addr(mac); 1615 1616 rcu_read_lock(); 1617 for_each_netdev_rcu (&init_net, ip_dev) { 1618 if (ipv6_chk_addr(&init_net, &laddr6, ip_dev, 1)) { 1619 if (vlan_id) 1620 *vlan_id = rdma_vlan_dev_vlan_id(ip_dev); 1621 if (ip_dev->dev_addr && mac) 1622 ether_addr_copy(mac, ip_dev->dev_addr); 1623 break; 1624 } 1625 } 1626 rcu_read_unlock(); 1627 } 1628 1629 /** 1630 * irdma_get_vlan_ipv4 - Returns the vlan_id for IPv4 address 1631 * @addr: local IPv4 address 1632 */ 1633 u16 irdma_get_vlan_ipv4(u32 *addr) 1634 { 1635 struct net_device *netdev; 1636 u16 vlan_id = 0xFFFF; 1637 1638 netdev = ip_dev_find(&init_net, htonl(addr[0])); 1639 if (netdev) { 1640 vlan_id = rdma_vlan_dev_vlan_id(netdev); 1641 dev_put(netdev); 1642 } 1643 1644 return vlan_id; 1645 } 1646 1647 /** 1648 * irdma_add_mqh_6 - Adds multiple qhashes for IPv6 1649 * @iwdev: iWarp device 1650 * @cm_info: CM info for parent listen node 1651 * @cm_parent_listen_node: The parent listen node 1652 * 1653 * Adds a qhash and a child listen node for every IPv6 address 1654 * on the adapter and adds the associated qhash filter 1655 */ 1656 static int irdma_add_mqh_6(struct irdma_device *iwdev, 1657 struct irdma_cm_info *cm_info, 1658 struct irdma_cm_listener *cm_parent_listen_node) 1659 { 1660 struct net_device *ip_dev; 1661 struct inet6_dev *idev; 1662 struct inet6_ifaddr *ifp, *tmp; 1663 struct irdma_cm_listener *child_listen_node; 1664 unsigned long flags; 1665 int ret = 0; 1666 1667 rtnl_lock(); 1668 for_each_netdev(&init_net, ip_dev) { 1669 if (!(ip_dev->flags & IFF_UP)) 1670 continue; 1671 1672 if (((rdma_vlan_dev_vlan_id(ip_dev) >= VLAN_N_VID) || 1673 (rdma_vlan_dev_real_dev(ip_dev) != iwdev->netdev)) && 1674 ip_dev != iwdev->netdev) 1675 continue; 1676 1677 idev = __in6_dev_get(ip_dev); 1678 if (!idev) { 1679 ibdev_dbg(&iwdev->ibdev, "CM: idev == NULL\n"); 1680 break; 1681 } 1682 list_for_each_entry_safe (ifp, tmp, &idev->addr_list, if_list) { 1683 ibdev_dbg(&iwdev->ibdev, "CM: IP=%pI6, vlan_id=%d, MAC=%pM\n", 1684 &ifp->addr, rdma_vlan_dev_vlan_id(ip_dev), 1685 ip_dev->dev_addr); 1686 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_KERNEL); 1687 ibdev_dbg(&iwdev->ibdev, "CM: Allocating child listener %p\n", 1688 child_listen_node); 1689 if (!child_listen_node) { 1690 ibdev_dbg(&iwdev->ibdev, "CM: listener memory allocation\n"); 1691 ret = -ENOMEM; 1692 goto exit; 1693 } 1694 1695 cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev); 1696 cm_parent_listen_node->vlan_id = cm_info->vlan_id; 1697 memcpy(child_listen_node, cm_parent_listen_node, 1698 sizeof(*child_listen_node)); 1699 irdma_copy_ip_ntohl(child_listen_node->loc_addr, 1700 ifp->addr.in6_u.u6_addr32); 1701 memcpy(cm_info->loc_addr, child_listen_node->loc_addr, 1702 sizeof(cm_info->loc_addr)); 1703 if (!iwdev->vsi.dscp_mode) 1704 cm_info->user_pri = 1705 irdma_iw_get_vlan_prio(child_listen_node->loc_addr, 1706 cm_info->user_pri, 1707 false); 1708 1709 ret = irdma_manage_qhash(iwdev, cm_info, 1710 IRDMA_QHASH_TYPE_TCP_SYN, 1711 IRDMA_QHASH_MANAGE_TYPE_ADD, 1712 NULL, true); 1713 if (ret) { 1714 kfree(child_listen_node); 1715 continue; 1716 } 1717 1718 trace_irdma_add_mqh_6(iwdev, child_listen_node, 1719 ip_dev->dev_addr); 1720 1721 child_listen_node->qhash_set = true; 1722 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags); 1723 list_add(&child_listen_node->child_listen_list, 1724 &cm_parent_listen_node->child_listen_list); 1725 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); 1726 cm_parent_listen_node->cm_core->stats_listen_nodes_created++; 1727 } 1728 } 1729 exit: 1730 rtnl_unlock(); 1731 1732 return ret; 1733 } 1734 1735 /** 1736 * irdma_add_mqh_4 - Adds multiple qhashes for IPv4 1737 * @iwdev: iWarp device 1738 * @cm_info: CM info for parent listen node 1739 * @cm_parent_listen_node: The parent listen node 1740 * 1741 * Adds a qhash and a child listen node for every IPv4 address 1742 * on the adapter and adds the associated qhash filter 1743 */ 1744 static int irdma_add_mqh_4(struct irdma_device *iwdev, 1745 struct irdma_cm_info *cm_info, 1746 struct irdma_cm_listener *cm_parent_listen_node) 1747 { 1748 struct net_device *ip_dev; 1749 struct in_device *idev; 1750 struct irdma_cm_listener *child_listen_node; 1751 unsigned long flags; 1752 const struct in_ifaddr *ifa; 1753 int ret = 0; 1754 1755 rtnl_lock(); 1756 for_each_netdev(&init_net, ip_dev) { 1757 if (!(ip_dev->flags & IFF_UP)) 1758 continue; 1759 1760 if (((rdma_vlan_dev_vlan_id(ip_dev) >= VLAN_N_VID) || 1761 (rdma_vlan_dev_real_dev(ip_dev) != iwdev->netdev)) && 1762 ip_dev != iwdev->netdev) 1763 continue; 1764 1765 idev = in_dev_get(ip_dev); 1766 if (!idev) 1767 continue; 1768 1769 in_dev_for_each_ifa_rtnl(ifa, idev) { 1770 ibdev_dbg(&iwdev->ibdev, 1771 "CM: Allocating child CM Listener forIP=%pI4, vlan_id=%d, MAC=%pM\n", 1772 &ifa->ifa_address, rdma_vlan_dev_vlan_id(ip_dev), 1773 ip_dev->dev_addr); 1774 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_KERNEL); 1775 cm_parent_listen_node->cm_core->stats_listen_nodes_created++; 1776 ibdev_dbg(&iwdev->ibdev, "CM: Allocating child listener %p\n", 1777 child_listen_node); 1778 if (!child_listen_node) { 1779 ibdev_dbg(&iwdev->ibdev, "CM: listener memory allocation\n"); 1780 in_dev_put(idev); 1781 ret = -ENOMEM; 1782 goto exit; 1783 } 1784 1785 cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev); 1786 cm_parent_listen_node->vlan_id = cm_info->vlan_id; 1787 memcpy(child_listen_node, cm_parent_listen_node, 1788 sizeof(*child_listen_node)); 1789 child_listen_node->loc_addr[0] = 1790 ntohl(ifa->ifa_address); 1791 memcpy(cm_info->loc_addr, child_listen_node->loc_addr, 1792 sizeof(cm_info->loc_addr)); 1793 if (!iwdev->vsi.dscp_mode) 1794 cm_info->user_pri = 1795 irdma_iw_get_vlan_prio(child_listen_node->loc_addr, 1796 cm_info->user_pri, 1797 true); 1798 ret = irdma_manage_qhash(iwdev, cm_info, 1799 IRDMA_QHASH_TYPE_TCP_SYN, 1800 IRDMA_QHASH_MANAGE_TYPE_ADD, 1801 NULL, true); 1802 if (ret) { 1803 kfree(child_listen_node); 1804 cm_parent_listen_node->cm_core 1805 ->stats_listen_nodes_created--; 1806 continue; 1807 } 1808 1809 trace_irdma_add_mqh_4(iwdev, child_listen_node, 1810 ip_dev->dev_addr); 1811 1812 child_listen_node->qhash_set = true; 1813 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, 1814 flags); 1815 list_add(&child_listen_node->child_listen_list, 1816 &cm_parent_listen_node->child_listen_list); 1817 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); 1818 } 1819 in_dev_put(idev); 1820 } 1821 exit: 1822 rtnl_unlock(); 1823 1824 return ret; 1825 } 1826 1827 /** 1828 * irdma_add_mqh - Adds multiple qhashes 1829 * @iwdev: iWarp device 1830 * @cm_info: CM info for parent listen node 1831 * @cm_listen_node: The parent listen node 1832 */ 1833 static int irdma_add_mqh(struct irdma_device *iwdev, 1834 struct irdma_cm_info *cm_info, 1835 struct irdma_cm_listener *cm_listen_node) 1836 { 1837 if (cm_info->ipv4) 1838 return irdma_add_mqh_4(iwdev, cm_info, cm_listen_node); 1839 else 1840 return irdma_add_mqh_6(iwdev, cm_info, cm_listen_node); 1841 } 1842 1843 /** 1844 * irdma_reset_list_prep - add connection nodes slated for reset to list 1845 * @cm_core: cm's core 1846 * @listener: pointer to listener node 1847 * @reset_list: a list to which cm_node will be selected 1848 */ 1849 static void irdma_reset_list_prep(struct irdma_cm_core *cm_core, 1850 struct irdma_cm_listener *listener, 1851 struct list_head *reset_list) 1852 { 1853 struct irdma_cm_node *cm_node; 1854 int bkt; 1855 1856 hash_for_each_rcu(cm_core->cm_hash_tbl, bkt, cm_node, list) { 1857 if (cm_node->listener == listener && 1858 !cm_node->accelerated && 1859 refcount_inc_not_zero(&cm_node->refcnt)) 1860 list_add(&cm_node->reset_entry, reset_list); 1861 } 1862 } 1863 1864 /** 1865 * irdma_dec_refcnt_listen - delete listener and associated cm nodes 1866 * @cm_core: cm's core 1867 * @listener: pointer to listener node 1868 * @free_hanging_nodes: to free associated cm_nodes 1869 * @apbvt_del: flag to delete the apbvt 1870 */ 1871 static int irdma_dec_refcnt_listen(struct irdma_cm_core *cm_core, 1872 struct irdma_cm_listener *listener, 1873 int free_hanging_nodes, bool apbvt_del) 1874 { 1875 int err; 1876 struct list_head *list_pos; 1877 struct list_head *list_temp; 1878 struct irdma_cm_node *cm_node; 1879 struct list_head reset_list; 1880 struct irdma_cm_info nfo; 1881 enum irdma_cm_node_state old_state; 1882 unsigned long flags; 1883 1884 trace_irdma_dec_refcnt_listen(listener, __builtin_return_address(0)); 1885 /* free non-accelerated child nodes for this listener */ 1886 INIT_LIST_HEAD(&reset_list); 1887 if (free_hanging_nodes) { 1888 rcu_read_lock(); 1889 irdma_reset_list_prep(cm_core, listener, &reset_list); 1890 rcu_read_unlock(); 1891 } 1892 1893 list_for_each_safe (list_pos, list_temp, &reset_list) { 1894 cm_node = container_of(list_pos, struct irdma_cm_node, 1895 reset_entry); 1896 if (cm_node->state >= IRDMA_CM_STATE_FIN_WAIT1) { 1897 irdma_rem_ref_cm_node(cm_node); 1898 continue; 1899 } 1900 1901 irdma_cleanup_retrans_entry(cm_node); 1902 err = irdma_send_reset(cm_node); 1903 if (err) { 1904 cm_node->state = IRDMA_CM_STATE_CLOSED; 1905 ibdev_dbg(&cm_node->iwdev->ibdev, 1906 "CM: send reset failed\n"); 1907 } else { 1908 old_state = cm_node->state; 1909 cm_node->state = IRDMA_CM_STATE_LISTENER_DESTROYED; 1910 if (old_state != IRDMA_CM_STATE_MPAREQ_RCVD) 1911 irdma_rem_ref_cm_node(cm_node); 1912 } 1913 } 1914 1915 if (refcount_dec_and_test(&listener->refcnt)) { 1916 spin_lock_irqsave(&cm_core->listen_list_lock, flags); 1917 list_del(&listener->list); 1918 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); 1919 1920 if (apbvt_del) 1921 irdma_del_apbvt(listener->iwdev, 1922 listener->apbvt_entry); 1923 memcpy(nfo.loc_addr, listener->loc_addr, sizeof(nfo.loc_addr)); 1924 nfo.loc_port = listener->loc_port; 1925 nfo.ipv4 = listener->ipv4; 1926 nfo.vlan_id = listener->vlan_id; 1927 nfo.user_pri = listener->user_pri; 1928 nfo.qh_qpid = listener->iwdev->vsi.ilq->qp_id; 1929 1930 if (!list_empty(&listener->child_listen_list)) { 1931 irdma_del_multiple_qhash(listener->iwdev, &nfo, 1932 listener); 1933 } else { 1934 if (listener->qhash_set) 1935 irdma_manage_qhash(listener->iwdev, 1936 &nfo, 1937 IRDMA_QHASH_TYPE_TCP_SYN, 1938 IRDMA_QHASH_MANAGE_TYPE_DELETE, 1939 NULL, false); 1940 } 1941 1942 cm_core->stats_listen_destroyed++; 1943 cm_core->stats_listen_nodes_destroyed++; 1944 ibdev_dbg(&listener->iwdev->ibdev, 1945 "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", 1946 listener->loc_port, listener->loc_addr, listener, 1947 listener->cm_id, listener->qhash_set, 1948 listener->vlan_id, apbvt_del); 1949 kfree(listener); 1950 listener = NULL; 1951 return 0; 1952 } 1953 1954 return -EINVAL; 1955 } 1956 1957 /** 1958 * irdma_cm_del_listen - delete a listener 1959 * @cm_core: cm's core 1960 * @listener: passive connection's listener 1961 * @apbvt_del: flag to delete apbvt 1962 */ 1963 static int irdma_cm_del_listen(struct irdma_cm_core *cm_core, 1964 struct irdma_cm_listener *listener, 1965 bool apbvt_del) 1966 { 1967 listener->listener_state = IRDMA_CM_LISTENER_PASSIVE_STATE; 1968 listener->cm_id = NULL; 1969 1970 return irdma_dec_refcnt_listen(cm_core, listener, 1, apbvt_del); 1971 } 1972 1973 /** 1974 * irdma_addr_resolve_neigh - resolve neighbor address 1975 * @iwdev: iwarp device structure 1976 * @src_ip: local ip address 1977 * @dst_ip: remote ip address 1978 * @arpindex: if there is an arp entry 1979 */ 1980 static int irdma_addr_resolve_neigh(struct irdma_device *iwdev, u32 src_ip, 1981 u32 dst_ip, int arpindex) 1982 { 1983 struct rtable *rt; 1984 struct neighbour *neigh; 1985 int rc = arpindex; 1986 __be32 dst_ipaddr = htonl(dst_ip); 1987 __be32 src_ipaddr = htonl(src_ip); 1988 1989 rt = ip_route_output(&init_net, dst_ipaddr, src_ipaddr, 0, 0, 1990 RT_SCOPE_UNIVERSE); 1991 if (IS_ERR(rt)) { 1992 ibdev_dbg(&iwdev->ibdev, "CM: ip_route_output fail\n"); 1993 return -EINVAL; 1994 } 1995 1996 neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr); 1997 if (!neigh) 1998 goto exit; 1999 2000 if (neigh->nud_state & NUD_VALID) 2001 rc = irdma_add_arp(iwdev->rf, &dst_ip, true, neigh->ha); 2002 else 2003 neigh_event_send(neigh, NULL); 2004 if (neigh) 2005 neigh_release(neigh); 2006 exit: 2007 ip_rt_put(rt); 2008 2009 return rc; 2010 } 2011 2012 /** 2013 * irdma_get_dst_ipv6 - get destination cache entry via ipv6 lookup 2014 * @src_addr: local ipv6 sock address 2015 * @dst_addr: destination ipv6 sock address 2016 */ 2017 static struct dst_entry *irdma_get_dst_ipv6(struct sockaddr_in6 *src_addr, 2018 struct sockaddr_in6 *dst_addr) 2019 { 2020 struct dst_entry *dst = NULL; 2021 2022 if ((IS_ENABLED(CONFIG_IPV6))) { 2023 struct flowi6 fl6 = {}; 2024 2025 fl6.daddr = dst_addr->sin6_addr; 2026 fl6.saddr = src_addr->sin6_addr; 2027 if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL) 2028 fl6.flowi6_oif = dst_addr->sin6_scope_id; 2029 2030 dst = ip6_route_output(&init_net, NULL, &fl6); 2031 } 2032 2033 return dst; 2034 } 2035 2036 /** 2037 * irdma_addr_resolve_neigh_ipv6 - resolve neighbor ipv6 address 2038 * @iwdev: iwarp device structure 2039 * @src: local ip address 2040 * @dest: remote ip address 2041 * @arpindex: if there is an arp entry 2042 */ 2043 static int irdma_addr_resolve_neigh_ipv6(struct irdma_device *iwdev, u32 *src, 2044 u32 *dest, int arpindex) 2045 { 2046 struct neighbour *neigh; 2047 int rc = arpindex; 2048 struct dst_entry *dst; 2049 struct sockaddr_in6 dst_addr = {}; 2050 struct sockaddr_in6 src_addr = {}; 2051 2052 dst_addr.sin6_family = AF_INET6; 2053 irdma_copy_ip_htonl(dst_addr.sin6_addr.in6_u.u6_addr32, dest); 2054 src_addr.sin6_family = AF_INET6; 2055 irdma_copy_ip_htonl(src_addr.sin6_addr.in6_u.u6_addr32, src); 2056 dst = irdma_get_dst_ipv6(&src_addr, &dst_addr); 2057 if (!dst || dst->error) { 2058 if (dst) { 2059 dst_release(dst); 2060 ibdev_dbg(&iwdev->ibdev, 2061 "CM: ip6_route_output returned dst->error = %d\n", 2062 dst->error); 2063 } 2064 return -EINVAL; 2065 } 2066 2067 neigh = dst_neigh_lookup(dst, dst_addr.sin6_addr.in6_u.u6_addr32); 2068 if (!neigh) 2069 goto exit; 2070 2071 ibdev_dbg(&iwdev->ibdev, "CM: dst_neigh_lookup MAC=%pM\n", 2072 neigh->ha); 2073 2074 trace_irdma_addr_resolve(iwdev, neigh->ha); 2075 2076 if (neigh->nud_state & NUD_VALID) 2077 rc = irdma_add_arp(iwdev->rf, dest, false, neigh->ha); 2078 else 2079 neigh_event_send(neigh, NULL); 2080 if (neigh) 2081 neigh_release(neigh); 2082 exit: 2083 dst_release(dst); 2084 2085 return rc; 2086 } 2087 2088 /** 2089 * irdma_find_node - find a cm node that matches the reference cm node 2090 * @cm_core: cm's core 2091 * @rem_port: remote tcp port num 2092 * @rem_addr: remote ip addr 2093 * @loc_port: local tcp port num 2094 * @loc_addr: local ip addr 2095 * @vlan_id: local VLAN ID 2096 */ 2097 struct irdma_cm_node *irdma_find_node(struct irdma_cm_core *cm_core, 2098 u16 rem_port, u32 *rem_addr, u16 loc_port, 2099 u32 *loc_addr, u16 vlan_id) 2100 { 2101 struct irdma_cm_node *cm_node; 2102 u32 key = (rem_port << 16) | loc_port; 2103 2104 rcu_read_lock(); 2105 hash_for_each_possible_rcu(cm_core->cm_hash_tbl, cm_node, list, key) { 2106 if (cm_node->vlan_id == vlan_id && 2107 cm_node->loc_port == loc_port && cm_node->rem_port == rem_port && 2108 !memcmp(cm_node->loc_addr, loc_addr, sizeof(cm_node->loc_addr)) && 2109 !memcmp(cm_node->rem_addr, rem_addr, sizeof(cm_node->rem_addr))) { 2110 if (!refcount_inc_not_zero(&cm_node->refcnt)) 2111 goto exit; 2112 rcu_read_unlock(); 2113 trace_irdma_find_node(cm_node, 0, NULL); 2114 return cm_node; 2115 } 2116 } 2117 2118 exit: 2119 rcu_read_unlock(); 2120 2121 /* no owner node */ 2122 return NULL; 2123 } 2124 2125 /** 2126 * irdma_add_hte_node - add a cm node to the hash table 2127 * @cm_core: cm's core 2128 * @cm_node: connection's node 2129 */ 2130 static void irdma_add_hte_node(struct irdma_cm_core *cm_core, 2131 struct irdma_cm_node *cm_node) 2132 { 2133 unsigned long flags; 2134 u32 key = (cm_node->rem_port << 16) | cm_node->loc_port; 2135 2136 spin_lock_irqsave(&cm_core->ht_lock, flags); 2137 hash_add_rcu(cm_core->cm_hash_tbl, &cm_node->list, key); 2138 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 2139 } 2140 2141 /** 2142 * irdma_ipv4_is_lpb - check if loopback 2143 * @loc_addr: local addr to compare 2144 * @rem_addr: remote address 2145 */ 2146 bool irdma_ipv4_is_lpb(u32 loc_addr, u32 rem_addr) 2147 { 2148 return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr); 2149 } 2150 2151 /** 2152 * irdma_ipv6_is_lpb - check if loopback 2153 * @loc_addr: local addr to compare 2154 * @rem_addr: remote address 2155 */ 2156 bool irdma_ipv6_is_lpb(u32 *loc_addr, u32 *rem_addr) 2157 { 2158 struct in6_addr raddr6; 2159 2160 irdma_copy_ip_htonl(raddr6.in6_u.u6_addr32, rem_addr); 2161 2162 return !memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6); 2163 } 2164 2165 /** 2166 * irdma_cm_create_ah - create a cm address handle 2167 * @cm_node: The connection manager node to create AH for 2168 * @wait: Provides option to wait for ah creation or not 2169 */ 2170 static int irdma_cm_create_ah(struct irdma_cm_node *cm_node, bool wait) 2171 { 2172 struct irdma_ah_info ah_info = {}; 2173 struct irdma_device *iwdev = cm_node->iwdev; 2174 2175 ether_addr_copy(ah_info.mac_addr, iwdev->netdev->dev_addr); 2176 2177 ah_info.hop_ttl = 0x40; 2178 ah_info.tc_tos = cm_node->tos; 2179 ah_info.vsi = &iwdev->vsi; 2180 2181 if (cm_node->ipv4) { 2182 ah_info.ipv4_valid = true; 2183 ah_info.dest_ip_addr[0] = cm_node->rem_addr[0]; 2184 ah_info.src_ip_addr[0] = cm_node->loc_addr[0]; 2185 ah_info.do_lpbk = irdma_ipv4_is_lpb(ah_info.src_ip_addr[0], 2186 ah_info.dest_ip_addr[0]); 2187 } else { 2188 memcpy(ah_info.dest_ip_addr, cm_node->rem_addr, 2189 sizeof(ah_info.dest_ip_addr)); 2190 memcpy(ah_info.src_ip_addr, cm_node->loc_addr, 2191 sizeof(ah_info.src_ip_addr)); 2192 ah_info.do_lpbk = irdma_ipv6_is_lpb(ah_info.src_ip_addr, 2193 ah_info.dest_ip_addr); 2194 } 2195 2196 ah_info.vlan_tag = cm_node->vlan_id; 2197 if (cm_node->vlan_id < VLAN_N_VID) { 2198 ah_info.insert_vlan_tag = 1; 2199 ah_info.vlan_tag |= cm_node->user_pri << VLAN_PRIO_SHIFT; 2200 } 2201 2202 ah_info.dst_arpindex = 2203 irdma_arp_table(iwdev->rf, ah_info.dest_ip_addr, 2204 ah_info.ipv4_valid, NULL, IRDMA_ARP_RESOLVE); 2205 2206 if (irdma_puda_create_ah(&iwdev->rf->sc_dev, &ah_info, wait, 2207 IRDMA_PUDA_RSRC_TYPE_ILQ, cm_node, 2208 &cm_node->ah)) 2209 return -ENOMEM; 2210 2211 trace_irdma_create_ah(cm_node); 2212 return 0; 2213 } 2214 2215 /** 2216 * irdma_cm_free_ah - free a cm address handle 2217 * @cm_node: The connection manager node to create AH for 2218 */ 2219 static void irdma_cm_free_ah(struct irdma_cm_node *cm_node) 2220 { 2221 struct irdma_device *iwdev = cm_node->iwdev; 2222 2223 trace_irdma_cm_free_ah(cm_node); 2224 irdma_puda_free_ah(&iwdev->rf->sc_dev, cm_node->ah); 2225 cm_node->ah = NULL; 2226 } 2227 2228 /** 2229 * irdma_make_cm_node - create a new instance of a cm node 2230 * @cm_core: cm's core 2231 * @iwdev: iwarp device structure 2232 * @cm_info: quad info for connection 2233 * @listener: passive connection's listener 2234 */ 2235 static struct irdma_cm_node * 2236 irdma_make_cm_node(struct irdma_cm_core *cm_core, struct irdma_device *iwdev, 2237 struct irdma_cm_info *cm_info, 2238 struct irdma_cm_listener *listener) 2239 { 2240 struct irdma_cm_node *cm_node; 2241 int oldarpindex; 2242 int arpindex; 2243 struct net_device *netdev = iwdev->netdev; 2244 2245 /* create an hte and cm_node for this instance */ 2246 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC); 2247 if (!cm_node) 2248 return NULL; 2249 2250 /* set our node specific transport info */ 2251 cm_node->ipv4 = cm_info->ipv4; 2252 cm_node->vlan_id = cm_info->vlan_id; 2253 if (cm_node->vlan_id >= VLAN_N_VID && iwdev->dcb_vlan_mode) 2254 cm_node->vlan_id = 0; 2255 cm_node->tos = cm_info->tos; 2256 cm_node->user_pri = cm_info->user_pri; 2257 if (listener) { 2258 if (listener->tos != cm_info->tos) 2259 ibdev_warn(&iwdev->ibdev, 2260 "application TOS[%d] and remote client TOS[%d] mismatch\n", 2261 listener->tos, cm_info->tos); 2262 if (iwdev->vsi.dscp_mode) { 2263 cm_node->user_pri = listener->user_pri; 2264 } else { 2265 cm_node->tos = max(listener->tos, cm_info->tos); 2266 cm_node->user_pri = rt_tos2priority(cm_node->tos); 2267 cm_node->user_pri = 2268 irdma_iw_get_vlan_prio(cm_info->loc_addr, 2269 cm_node->user_pri, 2270 cm_info->ipv4); 2271 } 2272 ibdev_dbg(&iwdev->ibdev, 2273 "DCB: listener: TOS:[%d] UP:[%d]\n", cm_node->tos, 2274 cm_node->user_pri); 2275 trace_irdma_listener_tos(iwdev, cm_node->tos, 2276 cm_node->user_pri); 2277 } 2278 memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr)); 2279 memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr)); 2280 cm_node->loc_port = cm_info->loc_port; 2281 cm_node->rem_port = cm_info->rem_port; 2282 2283 cm_node->mpa_frame_rev = IRDMA_CM_DEFAULT_MPA_VER; 2284 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO; 2285 cm_node->iwdev = iwdev; 2286 cm_node->dev = &iwdev->rf->sc_dev; 2287 2288 cm_node->ird_size = cm_node->dev->hw_attrs.max_hw_ird; 2289 cm_node->ord_size = cm_node->dev->hw_attrs.max_hw_ord; 2290 2291 cm_node->listener = listener; 2292 cm_node->cm_id = cm_info->cm_id; 2293 ether_addr_copy(cm_node->loc_mac, netdev->dev_addr); 2294 spin_lock_init(&cm_node->retrans_list_lock); 2295 cm_node->ack_rcvd = false; 2296 2297 init_completion(&cm_node->establish_comp); 2298 refcount_set(&cm_node->refcnt, 1); 2299 /* associate our parent CM core */ 2300 cm_node->cm_core = cm_core; 2301 cm_node->tcp_cntxt.loc_id = IRDMA_CM_DEFAULT_LOCAL_ID; 2302 cm_node->tcp_cntxt.rcv_wscale = iwdev->rcv_wscale; 2303 cm_node->tcp_cntxt.rcv_wnd = iwdev->rcv_wnd >> cm_node->tcp_cntxt.rcv_wscale; 2304 if (cm_node->ipv4) { 2305 cm_node->tcp_cntxt.loc_seq_num = secure_tcp_seq(htonl(cm_node->loc_addr[0]), 2306 htonl(cm_node->rem_addr[0]), 2307 htons(cm_node->loc_port), 2308 htons(cm_node->rem_port)); 2309 cm_node->tcp_cntxt.mss = iwdev->vsi.mtu - IRDMA_MTU_TO_MSS_IPV4; 2310 } else if (IS_ENABLED(CONFIG_IPV6)) { 2311 __be32 loc[4] = { 2312 htonl(cm_node->loc_addr[0]), htonl(cm_node->loc_addr[1]), 2313 htonl(cm_node->loc_addr[2]), htonl(cm_node->loc_addr[3]) 2314 }; 2315 __be32 rem[4] = { 2316 htonl(cm_node->rem_addr[0]), htonl(cm_node->rem_addr[1]), 2317 htonl(cm_node->rem_addr[2]), htonl(cm_node->rem_addr[3]) 2318 }; 2319 cm_node->tcp_cntxt.loc_seq_num = secure_tcpv6_seq(loc, rem, 2320 htons(cm_node->loc_port), 2321 htons(cm_node->rem_port)); 2322 cm_node->tcp_cntxt.mss = iwdev->vsi.mtu - IRDMA_MTU_TO_MSS_IPV6; 2323 } 2324 2325 if ((cm_node->ipv4 && 2326 irdma_ipv4_is_lpb(cm_node->loc_addr[0], cm_node->rem_addr[0])) || 2327 (!cm_node->ipv4 && 2328 irdma_ipv6_is_lpb(cm_node->loc_addr, cm_node->rem_addr))) { 2329 cm_node->do_lpb = true; 2330 arpindex = irdma_arp_table(iwdev->rf, cm_node->rem_addr, 2331 cm_node->ipv4, NULL, 2332 IRDMA_ARP_RESOLVE); 2333 } else { 2334 oldarpindex = irdma_arp_table(iwdev->rf, cm_node->rem_addr, 2335 cm_node->ipv4, NULL, 2336 IRDMA_ARP_RESOLVE); 2337 if (cm_node->ipv4) 2338 arpindex = irdma_addr_resolve_neigh(iwdev, 2339 cm_info->loc_addr[0], 2340 cm_info->rem_addr[0], 2341 oldarpindex); 2342 else if (IS_ENABLED(CONFIG_IPV6)) 2343 arpindex = irdma_addr_resolve_neigh_ipv6(iwdev, 2344 cm_info->loc_addr, 2345 cm_info->rem_addr, 2346 oldarpindex); 2347 else 2348 arpindex = -EINVAL; 2349 } 2350 2351 if (arpindex < 0) 2352 goto err; 2353 2354 ether_addr_copy(cm_node->rem_mac, 2355 iwdev->rf->arp_table[arpindex].mac_addr); 2356 irdma_add_hte_node(cm_core, cm_node); 2357 cm_core->stats_nodes_created++; 2358 return cm_node; 2359 2360 err: 2361 kfree(cm_node); 2362 2363 return NULL; 2364 } 2365 2366 static void irdma_destroy_connection(struct irdma_cm_node *cm_node) 2367 { 2368 struct irdma_cm_core *cm_core = cm_node->cm_core; 2369 struct irdma_qp *iwqp; 2370 struct irdma_cm_info nfo; 2371 2372 /* if the node is destroyed before connection was accelerated */ 2373 if (!cm_node->accelerated && cm_node->accept_pend) { 2374 ibdev_dbg(&cm_node->iwdev->ibdev, 2375 "CM: node destroyed before established\n"); 2376 atomic_dec(&cm_node->listener->pend_accepts_cnt); 2377 } 2378 if (cm_node->close_entry) 2379 irdma_handle_close_entry(cm_node, 0); 2380 if (cm_node->listener) { 2381 irdma_dec_refcnt_listen(cm_core, cm_node->listener, 0, true); 2382 } else { 2383 if (cm_node->apbvt_set) { 2384 irdma_del_apbvt(cm_node->iwdev, cm_node->apbvt_entry); 2385 cm_node->apbvt_set = 0; 2386 } 2387 irdma_get_addr_info(cm_node, &nfo); 2388 if (cm_node->qhash_set) { 2389 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id; 2390 irdma_manage_qhash(cm_node->iwdev, &nfo, 2391 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 2392 IRDMA_QHASH_MANAGE_TYPE_DELETE, NULL, 2393 false); 2394 cm_node->qhash_set = 0; 2395 } 2396 } 2397 2398 iwqp = cm_node->iwqp; 2399 if (iwqp) { 2400 cm_node->cm_id->rem_ref(cm_node->cm_id); 2401 cm_node->cm_id = NULL; 2402 iwqp->cm_id = NULL; 2403 irdma_qp_rem_ref(&iwqp->ibqp); 2404 cm_node->iwqp = NULL; 2405 } else if (cm_node->qhash_set) { 2406 irdma_get_addr_info(cm_node, &nfo); 2407 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id; 2408 irdma_manage_qhash(cm_node->iwdev, &nfo, 2409 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 2410 IRDMA_QHASH_MANAGE_TYPE_DELETE, NULL, false); 2411 cm_node->qhash_set = 0; 2412 } 2413 2414 cm_core->cm_free_ah(cm_node); 2415 } 2416 2417 /** 2418 * irdma_rem_ref_cm_node - destroy an instance of a cm node 2419 * @cm_node: connection's node 2420 */ 2421 void irdma_rem_ref_cm_node(struct irdma_cm_node *cm_node) 2422 { 2423 struct irdma_cm_core *cm_core = cm_node->cm_core; 2424 unsigned long flags; 2425 2426 trace_irdma_rem_ref_cm_node(cm_node, 0, __builtin_return_address(0)); 2427 spin_lock_irqsave(&cm_core->ht_lock, flags); 2428 2429 if (!refcount_dec_and_test(&cm_node->refcnt)) { 2430 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 2431 return; 2432 } 2433 if (cm_node->iwqp) { 2434 cm_node->iwqp->cm_node = NULL; 2435 cm_node->iwqp->cm_id = NULL; 2436 } 2437 hash_del_rcu(&cm_node->list); 2438 cm_node->cm_core->stats_nodes_destroyed++; 2439 2440 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 2441 2442 irdma_destroy_connection(cm_node); 2443 2444 kfree_rcu(cm_node, rcu_head); 2445 } 2446 2447 /** 2448 * irdma_handle_fin_pkt - FIN packet received 2449 * @cm_node: connection's node 2450 */ 2451 static void irdma_handle_fin_pkt(struct irdma_cm_node *cm_node) 2452 { 2453 switch (cm_node->state) { 2454 case IRDMA_CM_STATE_SYN_RCVD: 2455 case IRDMA_CM_STATE_SYN_SENT: 2456 case IRDMA_CM_STATE_ESTABLISHED: 2457 case IRDMA_CM_STATE_MPAREJ_RCVD: 2458 cm_node->tcp_cntxt.rcv_nxt++; 2459 irdma_cleanup_retrans_entry(cm_node); 2460 cm_node->state = IRDMA_CM_STATE_LAST_ACK; 2461 irdma_send_fin(cm_node); 2462 break; 2463 case IRDMA_CM_STATE_MPAREQ_SENT: 2464 irdma_create_event(cm_node, IRDMA_CM_EVENT_ABORTED); 2465 cm_node->tcp_cntxt.rcv_nxt++; 2466 irdma_cleanup_retrans_entry(cm_node); 2467 cm_node->state = IRDMA_CM_STATE_CLOSED; 2468 refcount_inc(&cm_node->refcnt); 2469 irdma_send_reset(cm_node); 2470 break; 2471 case IRDMA_CM_STATE_FIN_WAIT1: 2472 cm_node->tcp_cntxt.rcv_nxt++; 2473 irdma_cleanup_retrans_entry(cm_node); 2474 cm_node->state = IRDMA_CM_STATE_CLOSING; 2475 irdma_send_ack(cm_node); 2476 /* 2477 * Wait for ACK as this is simultaneous close. 2478 * After we receive ACK, do not send anything. 2479 * Just rm the node. 2480 */ 2481 break; 2482 case IRDMA_CM_STATE_FIN_WAIT2: 2483 cm_node->tcp_cntxt.rcv_nxt++; 2484 irdma_cleanup_retrans_entry(cm_node); 2485 cm_node->state = IRDMA_CM_STATE_TIME_WAIT; 2486 irdma_send_ack(cm_node); 2487 irdma_schedule_cm_timer(cm_node, NULL, IRDMA_TIMER_TYPE_CLOSE, 2488 1, 0); 2489 break; 2490 case IRDMA_CM_STATE_TIME_WAIT: 2491 cm_node->tcp_cntxt.rcv_nxt++; 2492 irdma_cleanup_retrans_entry(cm_node); 2493 cm_node->state = IRDMA_CM_STATE_CLOSED; 2494 irdma_rem_ref_cm_node(cm_node); 2495 break; 2496 case IRDMA_CM_STATE_OFFLOADED: 2497 default: 2498 ibdev_dbg(&cm_node->iwdev->ibdev, 2499 "CM: bad state node state = %d\n", cm_node->state); 2500 break; 2501 } 2502 } 2503 2504 /** 2505 * irdma_handle_rst_pkt - process received RST packet 2506 * @cm_node: connection's node 2507 * @rbuf: receive buffer 2508 */ 2509 static void irdma_handle_rst_pkt(struct irdma_cm_node *cm_node, 2510 struct irdma_puda_buf *rbuf) 2511 { 2512 ibdev_dbg(&cm_node->iwdev->ibdev, 2513 "CM: caller: %pS cm_node=%p state=%d rem_port=0x%04x loc_port=0x%04x rem_addr=%pI4 loc_addr=%pI4\n", 2514 __builtin_return_address(0), cm_node, cm_node->state, 2515 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr, 2516 cm_node->loc_addr); 2517 2518 irdma_cleanup_retrans_entry(cm_node); 2519 switch (cm_node->state) { 2520 case IRDMA_CM_STATE_SYN_SENT: 2521 case IRDMA_CM_STATE_MPAREQ_SENT: 2522 switch (cm_node->mpa_frame_rev) { 2523 case IETF_MPA_V2: 2524 /* Drop down to MPA_V1*/ 2525 cm_node->mpa_frame_rev = IETF_MPA_V1; 2526 /* send a syn and goto syn sent state */ 2527 cm_node->state = IRDMA_CM_STATE_SYN_SENT; 2528 if (irdma_send_syn(cm_node, 0)) 2529 irdma_active_open_err(cm_node, false); 2530 break; 2531 case IETF_MPA_V1: 2532 default: 2533 irdma_active_open_err(cm_node, false); 2534 break; 2535 } 2536 break; 2537 case IRDMA_CM_STATE_MPAREQ_RCVD: 2538 atomic_inc(&cm_node->passive_state); 2539 break; 2540 case IRDMA_CM_STATE_ESTABLISHED: 2541 case IRDMA_CM_STATE_SYN_RCVD: 2542 case IRDMA_CM_STATE_LISTENING: 2543 irdma_passive_open_err(cm_node, false); 2544 break; 2545 case IRDMA_CM_STATE_OFFLOADED: 2546 irdma_active_open_err(cm_node, false); 2547 break; 2548 case IRDMA_CM_STATE_CLOSED: 2549 break; 2550 case IRDMA_CM_STATE_FIN_WAIT2: 2551 case IRDMA_CM_STATE_FIN_WAIT1: 2552 case IRDMA_CM_STATE_LAST_ACK: 2553 case IRDMA_CM_STATE_TIME_WAIT: 2554 cm_node->state = IRDMA_CM_STATE_CLOSED; 2555 irdma_rem_ref_cm_node(cm_node); 2556 break; 2557 default: 2558 break; 2559 } 2560 } 2561 2562 /** 2563 * irdma_handle_rcv_mpa - Process a recv'd mpa buffer 2564 * @cm_node: connection's node 2565 * @rbuf: receive buffer 2566 */ 2567 static void irdma_handle_rcv_mpa(struct irdma_cm_node *cm_node, 2568 struct irdma_puda_buf *rbuf) 2569 { 2570 int err; 2571 int datasize = rbuf->datalen; 2572 u8 *dataloc = rbuf->data; 2573 2574 enum irdma_cm_event_type type = IRDMA_CM_EVENT_UNKNOWN; 2575 u32 res_type; 2576 2577 err = irdma_parse_mpa(cm_node, dataloc, &res_type, datasize); 2578 if (err) { 2579 if (cm_node->state == IRDMA_CM_STATE_MPAREQ_SENT) 2580 irdma_active_open_err(cm_node, true); 2581 else 2582 irdma_passive_open_err(cm_node, true); 2583 return; 2584 } 2585 2586 switch (cm_node->state) { 2587 case IRDMA_CM_STATE_ESTABLISHED: 2588 if (res_type == IRDMA_MPA_REQUEST_REJECT) 2589 ibdev_dbg(&cm_node->iwdev->ibdev, 2590 "CM: state for reject\n"); 2591 cm_node->state = IRDMA_CM_STATE_MPAREQ_RCVD; 2592 type = IRDMA_CM_EVENT_MPA_REQ; 2593 irdma_send_ack(cm_node); /* ACK received MPA request */ 2594 atomic_set(&cm_node->passive_state, 2595 IRDMA_PASSIVE_STATE_INDICATED); 2596 break; 2597 case IRDMA_CM_STATE_MPAREQ_SENT: 2598 irdma_cleanup_retrans_entry(cm_node); 2599 if (res_type == IRDMA_MPA_REQUEST_REJECT) { 2600 type = IRDMA_CM_EVENT_MPA_REJECT; 2601 cm_node->state = IRDMA_CM_STATE_MPAREJ_RCVD; 2602 } else { 2603 type = IRDMA_CM_EVENT_CONNECTED; 2604 cm_node->state = IRDMA_CM_STATE_OFFLOADED; 2605 } 2606 irdma_send_ack(cm_node); 2607 break; 2608 default: 2609 ibdev_dbg(&cm_node->iwdev->ibdev, 2610 "CM: wrong cm_node state =%d\n", cm_node->state); 2611 break; 2612 } 2613 irdma_create_event(cm_node, type); 2614 } 2615 2616 /** 2617 * irdma_check_syn - Check for error on received syn ack 2618 * @cm_node: connection's node 2619 * @tcph: pointer tcp header 2620 */ 2621 static int irdma_check_syn(struct irdma_cm_node *cm_node, struct tcphdr *tcph) 2622 { 2623 if (ntohl(tcph->ack_seq) != cm_node->tcp_cntxt.loc_seq_num) { 2624 irdma_active_open_err(cm_node, true); 2625 return 1; 2626 } 2627 2628 return 0; 2629 } 2630 2631 /** 2632 * irdma_check_seq - check seq numbers if OK 2633 * @cm_node: connection's node 2634 * @tcph: pointer tcp header 2635 */ 2636 static int irdma_check_seq(struct irdma_cm_node *cm_node, struct tcphdr *tcph) 2637 { 2638 u32 seq; 2639 u32 ack_seq; 2640 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num; 2641 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt; 2642 u32 rcv_wnd; 2643 int err = 0; 2644 2645 seq = ntohl(tcph->seq); 2646 ack_seq = ntohl(tcph->ack_seq); 2647 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd; 2648 if (ack_seq != loc_seq_num || 2649 !between(seq, rcv_nxt, (rcv_nxt + rcv_wnd))) 2650 err = -1; 2651 if (err) 2652 ibdev_dbg(&cm_node->iwdev->ibdev, 2653 "CM: seq number err\n"); 2654 2655 return err; 2656 } 2657 2658 void irdma_add_conn_est_qh(struct irdma_cm_node *cm_node) 2659 { 2660 struct irdma_cm_info nfo; 2661 2662 irdma_get_addr_info(cm_node, &nfo); 2663 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id; 2664 irdma_manage_qhash(cm_node->iwdev, &nfo, 2665 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 2666 IRDMA_QHASH_MANAGE_TYPE_ADD, 2667 cm_node, false); 2668 cm_node->qhash_set = true; 2669 } 2670 2671 /** 2672 * irdma_handle_syn_pkt - is for Passive node 2673 * @cm_node: connection's node 2674 * @rbuf: receive buffer 2675 */ 2676 static void irdma_handle_syn_pkt(struct irdma_cm_node *cm_node, 2677 struct irdma_puda_buf *rbuf) 2678 { 2679 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2680 int err; 2681 u32 inc_sequence; 2682 int optionsize; 2683 2684 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); 2685 inc_sequence = ntohl(tcph->seq); 2686 2687 switch (cm_node->state) { 2688 case IRDMA_CM_STATE_SYN_SENT: 2689 case IRDMA_CM_STATE_MPAREQ_SENT: 2690 /* Rcvd syn on active open connection */ 2691 irdma_active_open_err(cm_node, 1); 2692 break; 2693 case IRDMA_CM_STATE_LISTENING: 2694 /* Passive OPEN */ 2695 if (atomic_read(&cm_node->listener->pend_accepts_cnt) > 2696 cm_node->listener->backlog) { 2697 cm_node->cm_core->stats_backlog_drops++; 2698 irdma_passive_open_err(cm_node, false); 2699 break; 2700 } 2701 err = irdma_handle_tcp_options(cm_node, tcph, optionsize, 1); 2702 if (err) { 2703 irdma_passive_open_err(cm_node, false); 2704 /* drop pkt */ 2705 break; 2706 } 2707 err = cm_node->cm_core->cm_create_ah(cm_node, false); 2708 if (err) { 2709 irdma_passive_open_err(cm_node, false); 2710 /* drop pkt */ 2711 break; 2712 } 2713 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; 2714 cm_node->accept_pend = 1; 2715 atomic_inc(&cm_node->listener->pend_accepts_cnt); 2716 2717 cm_node->state = IRDMA_CM_STATE_SYN_RCVD; 2718 break; 2719 case IRDMA_CM_STATE_CLOSED: 2720 irdma_cleanup_retrans_entry(cm_node); 2721 refcount_inc(&cm_node->refcnt); 2722 irdma_send_reset(cm_node); 2723 break; 2724 case IRDMA_CM_STATE_OFFLOADED: 2725 case IRDMA_CM_STATE_ESTABLISHED: 2726 case IRDMA_CM_STATE_FIN_WAIT1: 2727 case IRDMA_CM_STATE_FIN_WAIT2: 2728 case IRDMA_CM_STATE_MPAREQ_RCVD: 2729 case IRDMA_CM_STATE_LAST_ACK: 2730 case IRDMA_CM_STATE_CLOSING: 2731 case IRDMA_CM_STATE_UNKNOWN: 2732 default: 2733 break; 2734 } 2735 } 2736 2737 /** 2738 * irdma_handle_synack_pkt - Process SYN+ACK packet (active side) 2739 * @cm_node: connection's node 2740 * @rbuf: receive buffer 2741 */ 2742 static void irdma_handle_synack_pkt(struct irdma_cm_node *cm_node, 2743 struct irdma_puda_buf *rbuf) 2744 { 2745 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2746 int err; 2747 u32 inc_sequence; 2748 int optionsize; 2749 2750 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); 2751 inc_sequence = ntohl(tcph->seq); 2752 switch (cm_node->state) { 2753 case IRDMA_CM_STATE_SYN_SENT: 2754 irdma_cleanup_retrans_entry(cm_node); 2755 /* active open */ 2756 if (irdma_check_syn(cm_node, tcph)) { 2757 ibdev_dbg(&cm_node->iwdev->ibdev, 2758 "CM: check syn fail\n"); 2759 return; 2760 } 2761 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); 2762 /* setup options */ 2763 err = irdma_handle_tcp_options(cm_node, tcph, optionsize, 0); 2764 if (err) { 2765 ibdev_dbg(&cm_node->iwdev->ibdev, 2766 "CM: cm_node=%p tcp_options failed\n", 2767 cm_node); 2768 break; 2769 } 2770 irdma_cleanup_retrans_entry(cm_node); 2771 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; 2772 irdma_send_ack(cm_node); /* ACK for the syn_ack */ 2773 err = irdma_send_mpa_request(cm_node); 2774 if (err) { 2775 ibdev_dbg(&cm_node->iwdev->ibdev, 2776 "CM: cm_node=%p irdma_send_mpa_request failed\n", 2777 cm_node); 2778 break; 2779 } 2780 cm_node->state = IRDMA_CM_STATE_MPAREQ_SENT; 2781 break; 2782 case IRDMA_CM_STATE_MPAREQ_RCVD: 2783 irdma_passive_open_err(cm_node, true); 2784 break; 2785 case IRDMA_CM_STATE_LISTENING: 2786 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq); 2787 irdma_cleanup_retrans_entry(cm_node); 2788 cm_node->state = IRDMA_CM_STATE_CLOSED; 2789 irdma_send_reset(cm_node); 2790 break; 2791 case IRDMA_CM_STATE_CLOSED: 2792 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq); 2793 irdma_cleanup_retrans_entry(cm_node); 2794 refcount_inc(&cm_node->refcnt); 2795 irdma_send_reset(cm_node); 2796 break; 2797 case IRDMA_CM_STATE_ESTABLISHED: 2798 case IRDMA_CM_STATE_FIN_WAIT1: 2799 case IRDMA_CM_STATE_FIN_WAIT2: 2800 case IRDMA_CM_STATE_LAST_ACK: 2801 case IRDMA_CM_STATE_OFFLOADED: 2802 case IRDMA_CM_STATE_CLOSING: 2803 case IRDMA_CM_STATE_UNKNOWN: 2804 case IRDMA_CM_STATE_MPAREQ_SENT: 2805 default: 2806 break; 2807 } 2808 } 2809 2810 /** 2811 * irdma_handle_ack_pkt - process packet with ACK 2812 * @cm_node: connection's node 2813 * @rbuf: receive buffer 2814 */ 2815 static int irdma_handle_ack_pkt(struct irdma_cm_node *cm_node, 2816 struct irdma_puda_buf *rbuf) 2817 { 2818 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2819 u32 inc_sequence; 2820 int ret; 2821 int optionsize; 2822 u32 datasize = rbuf->datalen; 2823 2824 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); 2825 2826 if (irdma_check_seq(cm_node, tcph)) 2827 return -EINVAL; 2828 2829 inc_sequence = ntohl(tcph->seq); 2830 switch (cm_node->state) { 2831 case IRDMA_CM_STATE_SYN_RCVD: 2832 irdma_cleanup_retrans_entry(cm_node); 2833 ret = irdma_handle_tcp_options(cm_node, tcph, optionsize, 1); 2834 if (ret) 2835 return ret; 2836 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); 2837 cm_node->state = IRDMA_CM_STATE_ESTABLISHED; 2838 if (datasize) { 2839 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; 2840 irdma_handle_rcv_mpa(cm_node, rbuf); 2841 } 2842 break; 2843 case IRDMA_CM_STATE_ESTABLISHED: 2844 irdma_cleanup_retrans_entry(cm_node); 2845 if (datasize) { 2846 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; 2847 irdma_handle_rcv_mpa(cm_node, rbuf); 2848 } 2849 break; 2850 case IRDMA_CM_STATE_MPAREQ_SENT: 2851 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); 2852 if (datasize) { 2853 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; 2854 cm_node->ack_rcvd = false; 2855 irdma_handle_rcv_mpa(cm_node, rbuf); 2856 } else { 2857 cm_node->ack_rcvd = true; 2858 } 2859 break; 2860 case IRDMA_CM_STATE_LISTENING: 2861 irdma_cleanup_retrans_entry(cm_node); 2862 cm_node->state = IRDMA_CM_STATE_CLOSED; 2863 irdma_send_reset(cm_node); 2864 break; 2865 case IRDMA_CM_STATE_CLOSED: 2866 irdma_cleanup_retrans_entry(cm_node); 2867 refcount_inc(&cm_node->refcnt); 2868 irdma_send_reset(cm_node); 2869 break; 2870 case IRDMA_CM_STATE_LAST_ACK: 2871 case IRDMA_CM_STATE_CLOSING: 2872 irdma_cleanup_retrans_entry(cm_node); 2873 cm_node->state = IRDMA_CM_STATE_CLOSED; 2874 irdma_rem_ref_cm_node(cm_node); 2875 break; 2876 case IRDMA_CM_STATE_FIN_WAIT1: 2877 irdma_cleanup_retrans_entry(cm_node); 2878 cm_node->state = IRDMA_CM_STATE_FIN_WAIT2; 2879 break; 2880 case IRDMA_CM_STATE_SYN_SENT: 2881 case IRDMA_CM_STATE_FIN_WAIT2: 2882 case IRDMA_CM_STATE_OFFLOADED: 2883 case IRDMA_CM_STATE_MPAREQ_RCVD: 2884 case IRDMA_CM_STATE_UNKNOWN: 2885 default: 2886 irdma_cleanup_retrans_entry(cm_node); 2887 break; 2888 } 2889 2890 return 0; 2891 } 2892 2893 /** 2894 * irdma_process_pkt - process cm packet 2895 * @cm_node: connection's node 2896 * @rbuf: receive buffer 2897 */ 2898 static void irdma_process_pkt(struct irdma_cm_node *cm_node, 2899 struct irdma_puda_buf *rbuf) 2900 { 2901 enum irdma_tcpip_pkt_type pkt_type = IRDMA_PKT_TYPE_UNKNOWN; 2902 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2903 u32 fin_set = 0; 2904 int err; 2905 2906 if (tcph->rst) { 2907 pkt_type = IRDMA_PKT_TYPE_RST; 2908 } else if (tcph->syn) { 2909 pkt_type = IRDMA_PKT_TYPE_SYN; 2910 if (tcph->ack) 2911 pkt_type = IRDMA_PKT_TYPE_SYNACK; 2912 } else if (tcph->ack) { 2913 pkt_type = IRDMA_PKT_TYPE_ACK; 2914 } 2915 if (tcph->fin) 2916 fin_set = 1; 2917 2918 switch (pkt_type) { 2919 case IRDMA_PKT_TYPE_SYN: 2920 irdma_handle_syn_pkt(cm_node, rbuf); 2921 break; 2922 case IRDMA_PKT_TYPE_SYNACK: 2923 irdma_handle_synack_pkt(cm_node, rbuf); 2924 break; 2925 case IRDMA_PKT_TYPE_ACK: 2926 err = irdma_handle_ack_pkt(cm_node, rbuf); 2927 if (fin_set && !err) 2928 irdma_handle_fin_pkt(cm_node); 2929 break; 2930 case IRDMA_PKT_TYPE_RST: 2931 irdma_handle_rst_pkt(cm_node, rbuf); 2932 break; 2933 default: 2934 if (fin_set && 2935 (!irdma_check_seq(cm_node, (struct tcphdr *)rbuf->tcph))) 2936 irdma_handle_fin_pkt(cm_node); 2937 break; 2938 } 2939 } 2940 2941 /** 2942 * irdma_make_listen_node - create a listen node with params 2943 * @cm_core: cm's core 2944 * @iwdev: iwarp device structure 2945 * @cm_info: quad info for connection 2946 */ 2947 static struct irdma_cm_listener * 2948 irdma_make_listen_node(struct irdma_cm_core *cm_core, 2949 struct irdma_device *iwdev, 2950 struct irdma_cm_info *cm_info) 2951 { 2952 struct irdma_cm_listener *listener; 2953 unsigned long flags; 2954 2955 /* cannot have multiple matching listeners */ 2956 listener = 2957 irdma_find_listener(cm_core, cm_info->loc_addr, cm_info->ipv4, 2958 cm_info->loc_port, cm_info->vlan_id, 2959 IRDMA_CM_LISTENER_EITHER_STATE); 2960 if (listener && 2961 listener->listener_state == IRDMA_CM_LISTENER_ACTIVE_STATE) { 2962 refcount_dec(&listener->refcnt); 2963 return NULL; 2964 } 2965 2966 if (!listener) { 2967 /* create a CM listen node 2968 * 1/2 node to compare incoming traffic to 2969 */ 2970 listener = kzalloc(sizeof(*listener), GFP_KERNEL); 2971 if (!listener) 2972 return NULL; 2973 cm_core->stats_listen_nodes_created++; 2974 memcpy(listener->loc_addr, cm_info->loc_addr, 2975 sizeof(listener->loc_addr)); 2976 listener->loc_port = cm_info->loc_port; 2977 2978 INIT_LIST_HEAD(&listener->child_listen_list); 2979 2980 refcount_set(&listener->refcnt, 1); 2981 } else { 2982 listener->reused_node = 1; 2983 } 2984 2985 listener->cm_id = cm_info->cm_id; 2986 listener->ipv4 = cm_info->ipv4; 2987 listener->vlan_id = cm_info->vlan_id; 2988 atomic_set(&listener->pend_accepts_cnt, 0); 2989 listener->cm_core = cm_core; 2990 listener->iwdev = iwdev; 2991 2992 listener->backlog = cm_info->backlog; 2993 listener->listener_state = IRDMA_CM_LISTENER_ACTIVE_STATE; 2994 2995 if (!listener->reused_node) { 2996 spin_lock_irqsave(&cm_core->listen_list_lock, flags); 2997 list_add(&listener->list, &cm_core->listen_list); 2998 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); 2999 } 3000 3001 return listener; 3002 } 3003 3004 /** 3005 * irdma_create_cm_node - make a connection node with params 3006 * @cm_core: cm's core 3007 * @iwdev: iwarp device structure 3008 * @conn_param: connection parameters 3009 * @cm_info: quad info for connection 3010 * @caller_cm_node: pointer to cm_node structure to return 3011 */ 3012 static int irdma_create_cm_node(struct irdma_cm_core *cm_core, 3013 struct irdma_device *iwdev, 3014 struct iw_cm_conn_param *conn_param, 3015 struct irdma_cm_info *cm_info, 3016 struct irdma_cm_node **caller_cm_node) 3017 { 3018 struct irdma_cm_node *cm_node; 3019 u16 private_data_len = conn_param->private_data_len; 3020 const void *private_data = conn_param->private_data; 3021 3022 /* create a CM connection node */ 3023 cm_node = irdma_make_cm_node(cm_core, iwdev, cm_info, NULL); 3024 if (!cm_node) 3025 return -ENOMEM; 3026 3027 /* set our node side to client (active) side */ 3028 cm_node->tcp_cntxt.client = 1; 3029 cm_node->tcp_cntxt.rcv_wscale = IRDMA_CM_DEFAULT_RCV_WND_SCALE; 3030 3031 irdma_record_ird_ord(cm_node, conn_param->ird, conn_param->ord); 3032 3033 cm_node->pdata.size = private_data_len; 3034 cm_node->pdata.addr = cm_node->pdata_buf; 3035 3036 memcpy(cm_node->pdata_buf, private_data, private_data_len); 3037 *caller_cm_node = cm_node; 3038 3039 return 0; 3040 } 3041 3042 /** 3043 * irdma_cm_reject - reject and teardown a connection 3044 * @cm_node: connection's node 3045 * @pdata: ptr to private data for reject 3046 * @plen: size of private data 3047 */ 3048 static int irdma_cm_reject(struct irdma_cm_node *cm_node, const void *pdata, 3049 u8 plen) 3050 { 3051 int ret; 3052 int passive_state; 3053 3054 if (cm_node->tcp_cntxt.client) 3055 return 0; 3056 3057 irdma_cleanup_retrans_entry(cm_node); 3058 3059 passive_state = atomic_add_return(1, &cm_node->passive_state); 3060 if (passive_state == IRDMA_SEND_RESET_EVENT) { 3061 cm_node->state = IRDMA_CM_STATE_CLOSED; 3062 irdma_rem_ref_cm_node(cm_node); 3063 return 0; 3064 } 3065 3066 if (cm_node->state == IRDMA_CM_STATE_LISTENER_DESTROYED) { 3067 irdma_rem_ref_cm_node(cm_node); 3068 return 0; 3069 } 3070 3071 ret = irdma_send_mpa_reject(cm_node, pdata, plen); 3072 if (!ret) 3073 return 0; 3074 3075 cm_node->state = IRDMA_CM_STATE_CLOSED; 3076 if (irdma_send_reset(cm_node)) 3077 ibdev_dbg(&cm_node->iwdev->ibdev, 3078 "CM: send reset failed\n"); 3079 3080 return ret; 3081 } 3082 3083 /** 3084 * irdma_cm_close - close of cm connection 3085 * @cm_node: connection's node 3086 */ 3087 static int irdma_cm_close(struct irdma_cm_node *cm_node) 3088 { 3089 switch (cm_node->state) { 3090 case IRDMA_CM_STATE_SYN_RCVD: 3091 case IRDMA_CM_STATE_SYN_SENT: 3092 case IRDMA_CM_STATE_ONE_SIDE_ESTABLISHED: 3093 case IRDMA_CM_STATE_ESTABLISHED: 3094 case IRDMA_CM_STATE_ACCEPTING: 3095 case IRDMA_CM_STATE_MPAREQ_SENT: 3096 case IRDMA_CM_STATE_MPAREQ_RCVD: 3097 irdma_cleanup_retrans_entry(cm_node); 3098 irdma_send_reset(cm_node); 3099 break; 3100 case IRDMA_CM_STATE_CLOSE_WAIT: 3101 cm_node->state = IRDMA_CM_STATE_LAST_ACK; 3102 irdma_send_fin(cm_node); 3103 break; 3104 case IRDMA_CM_STATE_FIN_WAIT1: 3105 case IRDMA_CM_STATE_FIN_WAIT2: 3106 case IRDMA_CM_STATE_LAST_ACK: 3107 case IRDMA_CM_STATE_TIME_WAIT: 3108 case IRDMA_CM_STATE_CLOSING: 3109 return -EINVAL; 3110 case IRDMA_CM_STATE_LISTENING: 3111 irdma_cleanup_retrans_entry(cm_node); 3112 irdma_send_reset(cm_node); 3113 break; 3114 case IRDMA_CM_STATE_MPAREJ_RCVD: 3115 case IRDMA_CM_STATE_UNKNOWN: 3116 case IRDMA_CM_STATE_INITED: 3117 case IRDMA_CM_STATE_CLOSED: 3118 case IRDMA_CM_STATE_LISTENER_DESTROYED: 3119 irdma_rem_ref_cm_node(cm_node); 3120 break; 3121 case IRDMA_CM_STATE_OFFLOADED: 3122 if (cm_node->send_entry) 3123 ibdev_dbg(&cm_node->iwdev->ibdev, 3124 "CM: CM send_entry in OFFLOADED state\n"); 3125 irdma_rem_ref_cm_node(cm_node); 3126 break; 3127 } 3128 3129 return 0; 3130 } 3131 3132 /** 3133 * irdma_receive_ilq - recv an ETHERNET packet, and process it 3134 * through CM 3135 * @vsi: VSI structure of dev 3136 * @rbuf: receive buffer 3137 */ 3138 void irdma_receive_ilq(struct irdma_sc_vsi *vsi, struct irdma_puda_buf *rbuf) 3139 { 3140 struct irdma_cm_node *cm_node; 3141 struct irdma_cm_listener *listener; 3142 struct iphdr *iph; 3143 struct ipv6hdr *ip6h; 3144 struct tcphdr *tcph; 3145 struct irdma_cm_info cm_info = {}; 3146 struct irdma_device *iwdev = vsi->back_vsi; 3147 struct irdma_cm_core *cm_core = &iwdev->cm_core; 3148 struct vlan_ethhdr *ethh; 3149 u16 vtag; 3150 3151 /* if vlan, then maclen = 18 else 14 */ 3152 iph = (struct iphdr *)rbuf->iph; 3153 print_hex_dump_debug("ILQ: RECEIVE ILQ BUFFER", DUMP_PREFIX_OFFSET, 3154 16, 8, rbuf->mem.va, rbuf->totallen, false); 3155 if (iwdev->rf->sc_dev.hw_attrs.uk_attrs.hw_rev >= IRDMA_GEN_2) { 3156 if (rbuf->vlan_valid) { 3157 vtag = rbuf->vlan_id; 3158 cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >> 3159 VLAN_PRIO_SHIFT; 3160 cm_info.vlan_id = vtag & VLAN_VID_MASK; 3161 } else { 3162 cm_info.vlan_id = 0xFFFF; 3163 } 3164 } else { 3165 ethh = rbuf->mem.va; 3166 3167 if (ethh->h_vlan_proto == htons(ETH_P_8021Q)) { 3168 vtag = ntohs(ethh->h_vlan_TCI); 3169 cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >> 3170 VLAN_PRIO_SHIFT; 3171 cm_info.vlan_id = vtag & VLAN_VID_MASK; 3172 ibdev_dbg(&cm_core->iwdev->ibdev, 3173 "CM: vlan_id=%d\n", cm_info.vlan_id); 3174 } else { 3175 cm_info.vlan_id = 0xFFFF; 3176 } 3177 } 3178 tcph = (struct tcphdr *)rbuf->tcph; 3179 3180 if (rbuf->ipv4) { 3181 cm_info.loc_addr[0] = ntohl(iph->daddr); 3182 cm_info.rem_addr[0] = ntohl(iph->saddr); 3183 cm_info.ipv4 = true; 3184 cm_info.tos = iph->tos; 3185 } else { 3186 ip6h = (struct ipv6hdr *)rbuf->iph; 3187 irdma_copy_ip_ntohl(cm_info.loc_addr, 3188 ip6h->daddr.in6_u.u6_addr32); 3189 irdma_copy_ip_ntohl(cm_info.rem_addr, 3190 ip6h->saddr.in6_u.u6_addr32); 3191 cm_info.ipv4 = false; 3192 cm_info.tos = (ip6h->priority << 4) | (ip6h->flow_lbl[0] >> 4); 3193 } 3194 cm_info.loc_port = ntohs(tcph->dest); 3195 cm_info.rem_port = ntohs(tcph->source); 3196 cm_node = irdma_find_node(cm_core, cm_info.rem_port, cm_info.rem_addr, 3197 cm_info.loc_port, cm_info.loc_addr, cm_info.vlan_id); 3198 3199 if (!cm_node) { 3200 /* Only type of packet accepted are for the 3201 * PASSIVE open (syn only) 3202 */ 3203 if (!tcph->syn || tcph->ack) 3204 return; 3205 3206 listener = irdma_find_listener(cm_core, 3207 cm_info.loc_addr, 3208 cm_info.ipv4, 3209 cm_info.loc_port, 3210 cm_info.vlan_id, 3211 IRDMA_CM_LISTENER_ACTIVE_STATE); 3212 if (!listener) { 3213 cm_info.cm_id = NULL; 3214 ibdev_dbg(&cm_core->iwdev->ibdev, 3215 "CM: no listener found\n"); 3216 return; 3217 } 3218 3219 cm_info.cm_id = listener->cm_id; 3220 cm_node = irdma_make_cm_node(cm_core, iwdev, &cm_info, 3221 listener); 3222 if (!cm_node) { 3223 ibdev_dbg(&cm_core->iwdev->ibdev, 3224 "CM: allocate node failed\n"); 3225 refcount_dec(&listener->refcnt); 3226 return; 3227 } 3228 3229 if (!tcph->rst && !tcph->fin) { 3230 cm_node->state = IRDMA_CM_STATE_LISTENING; 3231 } else { 3232 irdma_rem_ref_cm_node(cm_node); 3233 return; 3234 } 3235 3236 refcount_inc(&cm_node->refcnt); 3237 } else if (cm_node->state == IRDMA_CM_STATE_OFFLOADED) { 3238 irdma_rem_ref_cm_node(cm_node); 3239 return; 3240 } 3241 3242 irdma_process_pkt(cm_node, rbuf); 3243 irdma_rem_ref_cm_node(cm_node); 3244 } 3245 3246 static int irdma_add_qh(struct irdma_cm_node *cm_node, bool active) 3247 { 3248 if (!active) 3249 irdma_add_conn_est_qh(cm_node); 3250 return 0; 3251 } 3252 3253 static void irdma_cm_free_ah_nop(struct irdma_cm_node *cm_node) 3254 { 3255 } 3256 3257 /** 3258 * irdma_setup_cm_core - setup top level instance of a cm core 3259 * @iwdev: iwarp device structure 3260 * @rdma_ver: HW version 3261 */ 3262 int irdma_setup_cm_core(struct irdma_device *iwdev, u8 rdma_ver) 3263 { 3264 struct irdma_cm_core *cm_core = &iwdev->cm_core; 3265 3266 cm_core->iwdev = iwdev; 3267 cm_core->dev = &iwdev->rf->sc_dev; 3268 3269 /* Handles CM event work items send to Iwarp core */ 3270 cm_core->event_wq = alloc_ordered_workqueue("iwarp-event-wq", 0); 3271 if (!cm_core->event_wq) 3272 return -ENOMEM; 3273 3274 INIT_LIST_HEAD(&cm_core->listen_list); 3275 3276 timer_setup(&cm_core->tcp_timer, irdma_cm_timer_tick, 0); 3277 3278 spin_lock_init(&cm_core->ht_lock); 3279 spin_lock_init(&cm_core->listen_list_lock); 3280 spin_lock_init(&cm_core->apbvt_lock); 3281 switch (rdma_ver) { 3282 case IRDMA_GEN_1: 3283 cm_core->form_cm_frame = irdma_form_uda_cm_frame; 3284 cm_core->cm_create_ah = irdma_add_qh; 3285 cm_core->cm_free_ah = irdma_cm_free_ah_nop; 3286 break; 3287 case IRDMA_GEN_2: 3288 default: 3289 cm_core->form_cm_frame = irdma_form_ah_cm_frame; 3290 cm_core->cm_create_ah = irdma_cm_create_ah; 3291 cm_core->cm_free_ah = irdma_cm_free_ah; 3292 } 3293 3294 return 0; 3295 } 3296 3297 /** 3298 * irdma_cleanup_cm_core - deallocate a top level instance of a 3299 * cm core 3300 * @cm_core: cm's core 3301 */ 3302 void irdma_cleanup_cm_core(struct irdma_cm_core *cm_core) 3303 { 3304 if (!cm_core) 3305 return; 3306 3307 timer_delete_sync(&cm_core->tcp_timer); 3308 3309 destroy_workqueue(cm_core->event_wq); 3310 cm_core->dev->ws_reset(&cm_core->iwdev->vsi); 3311 } 3312 3313 /** 3314 * irdma_init_tcp_ctx - setup qp context 3315 * @cm_node: connection's node 3316 * @tcp_info: offload info for tcp 3317 * @iwqp: associate qp for the connection 3318 */ 3319 static void irdma_init_tcp_ctx(struct irdma_cm_node *cm_node, 3320 struct irdma_tcp_offload_info *tcp_info, 3321 struct irdma_qp *iwqp) 3322 { 3323 tcp_info->ipv4 = cm_node->ipv4; 3324 tcp_info->drop_ooo_seg = !iwqp->iwdev->iw_ooo; 3325 tcp_info->wscale = true; 3326 tcp_info->ignore_tcp_opt = true; 3327 tcp_info->ignore_tcp_uns_opt = true; 3328 tcp_info->no_nagle = false; 3329 3330 tcp_info->ttl = IRDMA_DEFAULT_TTL; 3331 tcp_info->rtt_var = IRDMA_DEFAULT_RTT_VAR; 3332 tcp_info->ss_thresh = IRDMA_DEFAULT_SS_THRESH; 3333 tcp_info->rexmit_thresh = IRDMA_DEFAULT_REXMIT_THRESH; 3334 3335 tcp_info->tcp_state = IRDMA_TCP_STATE_ESTABLISHED; 3336 tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale; 3337 tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale; 3338 3339 tcp_info->snd_nxt = cm_node->tcp_cntxt.loc_seq_num; 3340 tcp_info->snd_wnd = cm_node->tcp_cntxt.snd_wnd; 3341 tcp_info->rcv_nxt = cm_node->tcp_cntxt.rcv_nxt; 3342 tcp_info->snd_max = cm_node->tcp_cntxt.loc_seq_num; 3343 3344 tcp_info->snd_una = cm_node->tcp_cntxt.loc_seq_num; 3345 tcp_info->cwnd = 2 * cm_node->tcp_cntxt.mss; 3346 tcp_info->snd_wl1 = cm_node->tcp_cntxt.rcv_nxt; 3347 tcp_info->snd_wl2 = cm_node->tcp_cntxt.loc_seq_num; 3348 tcp_info->max_snd_window = cm_node->tcp_cntxt.max_snd_wnd; 3349 tcp_info->rcv_wnd = cm_node->tcp_cntxt.rcv_wnd 3350 << cm_node->tcp_cntxt.rcv_wscale; 3351 3352 tcp_info->flow_label = 0; 3353 tcp_info->snd_mss = (u32)cm_node->tcp_cntxt.mss; 3354 tcp_info->tos = cm_node->tos; 3355 if (cm_node->vlan_id < VLAN_N_VID) { 3356 tcp_info->insert_vlan_tag = true; 3357 tcp_info->vlan_tag = cm_node->vlan_id; 3358 tcp_info->vlan_tag |= cm_node->user_pri << VLAN_PRIO_SHIFT; 3359 } 3360 if (cm_node->ipv4) { 3361 tcp_info->src_port = cm_node->loc_port; 3362 tcp_info->dst_port = cm_node->rem_port; 3363 3364 tcp_info->dest_ip_addr[3] = cm_node->rem_addr[0]; 3365 tcp_info->local_ipaddr[3] = cm_node->loc_addr[0]; 3366 tcp_info->arp_idx = (u16)irdma_arp_table(iwqp->iwdev->rf, 3367 &tcp_info->dest_ip_addr[3], 3368 true, NULL, 3369 IRDMA_ARP_RESOLVE); 3370 } else { 3371 tcp_info->src_port = cm_node->loc_port; 3372 tcp_info->dst_port = cm_node->rem_port; 3373 memcpy(tcp_info->dest_ip_addr, cm_node->rem_addr, 3374 sizeof(tcp_info->dest_ip_addr)); 3375 memcpy(tcp_info->local_ipaddr, cm_node->loc_addr, 3376 sizeof(tcp_info->local_ipaddr)); 3377 3378 tcp_info->arp_idx = (u16)irdma_arp_table(iwqp->iwdev->rf, 3379 &tcp_info->dest_ip_addr[0], 3380 false, NULL, 3381 IRDMA_ARP_RESOLVE); 3382 } 3383 } 3384 3385 /** 3386 * irdma_cm_init_tsa_conn - setup qp for RTS 3387 * @iwqp: associate qp for the connection 3388 * @cm_node: connection's node 3389 */ 3390 static void irdma_cm_init_tsa_conn(struct irdma_qp *iwqp, 3391 struct irdma_cm_node *cm_node) 3392 { 3393 struct irdma_iwarp_offload_info *iwarp_info; 3394 struct irdma_qp_host_ctx_info *ctx_info; 3395 3396 iwarp_info = &iwqp->iwarp_info; 3397 ctx_info = &iwqp->ctx_info; 3398 3399 ctx_info->tcp_info = &iwqp->tcp_info; 3400 ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id; 3401 ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id; 3402 3403 iwarp_info->ord_size = cm_node->ord_size; 3404 iwarp_info->ird_size = cm_node->ird_size; 3405 iwarp_info->rd_en = true; 3406 iwarp_info->rdmap_ver = 1; 3407 iwarp_info->ddp_ver = 1; 3408 iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id; 3409 3410 ctx_info->tcp_info_valid = true; 3411 ctx_info->iwarp_info_valid = true; 3412 ctx_info->user_pri = cm_node->user_pri; 3413 3414 irdma_init_tcp_ctx(cm_node, &iwqp->tcp_info, iwqp); 3415 if (cm_node->snd_mark_en) { 3416 iwarp_info->snd_mark_en = true; 3417 iwarp_info->snd_mark_offset = (iwqp->tcp_info.snd_nxt & SNDMARKER_SEQNMASK) + 3418 cm_node->lsmm_size; 3419 } 3420 3421 cm_node->state = IRDMA_CM_STATE_OFFLOADED; 3422 iwqp->tcp_info.tcp_state = IRDMA_TCP_STATE_ESTABLISHED; 3423 iwqp->tcp_info.src_mac_addr_idx = iwqp->iwdev->mac_ip_table_idx; 3424 3425 if (cm_node->rcv_mark_en) { 3426 iwarp_info->rcv_mark_en = true; 3427 iwarp_info->align_hdrs = true; 3428 } 3429 3430 irdma_sc_qp_setctx(&iwqp->sc_qp, iwqp->host_ctx.va, ctx_info); 3431 3432 /* once tcp_info is set, no need to do it again */ 3433 ctx_info->tcp_info_valid = false; 3434 ctx_info->iwarp_info_valid = false; 3435 } 3436 3437 /** 3438 * irdma_cm_disconn - when a connection is being closed 3439 * @iwqp: associated qp for the connection 3440 */ 3441 void irdma_cm_disconn(struct irdma_qp *iwqp) 3442 { 3443 struct irdma_device *iwdev = iwqp->iwdev; 3444 struct disconn_work *work; 3445 unsigned long flags; 3446 3447 work = kzalloc(sizeof(*work), GFP_ATOMIC); 3448 if (!work) 3449 return; 3450 3451 spin_lock_irqsave(&iwdev->rf->qptable_lock, flags); 3452 if (!iwdev->rf->qp_table[iwqp->ibqp.qp_num]) { 3453 spin_unlock_irqrestore(&iwdev->rf->qptable_lock, flags); 3454 ibdev_dbg(&iwdev->ibdev, 3455 "CM: qp_id %d is already freed\n", 3456 iwqp->ibqp.qp_num); 3457 kfree(work); 3458 return; 3459 } 3460 irdma_qp_add_ref(&iwqp->ibqp); 3461 spin_unlock_irqrestore(&iwdev->rf->qptable_lock, flags); 3462 3463 work->iwqp = iwqp; 3464 INIT_WORK(&work->work, irdma_disconnect_worker); 3465 queue_work(iwdev->cleanup_wq, &work->work); 3466 } 3467 3468 /** 3469 * irdma_qp_disconnect - free qp and close cm 3470 * @iwqp: associate qp for the connection 3471 */ 3472 static void irdma_qp_disconnect(struct irdma_qp *iwqp) 3473 { 3474 struct irdma_device *iwdev = iwqp->iwdev; 3475 3476 iwqp->active_conn = 0; 3477 /* close the CM node down if it is still active */ 3478 ibdev_dbg(&iwdev->ibdev, "CM: Call close API\n"); 3479 irdma_cm_close(iwqp->cm_node); 3480 } 3481 3482 /** 3483 * irdma_cm_disconn_true - called by worker thread to disconnect qp 3484 * @iwqp: associate qp for the connection 3485 */ 3486 static void irdma_cm_disconn_true(struct irdma_qp *iwqp) 3487 { 3488 struct iw_cm_id *cm_id; 3489 struct irdma_device *iwdev; 3490 struct irdma_sc_qp *qp = &iwqp->sc_qp; 3491 u16 last_ae; 3492 u8 original_hw_tcp_state; 3493 u8 original_ibqp_state; 3494 int disconn_status = 0; 3495 int issue_disconn = 0; 3496 int issue_close = 0; 3497 int issue_flush = 0; 3498 unsigned long flags; 3499 int err; 3500 3501 iwdev = iwqp->iwdev; 3502 spin_lock_irqsave(&iwqp->lock, flags); 3503 if (rdma_protocol_roce(&iwdev->ibdev, 1)) { 3504 struct ib_qp_attr attr; 3505 3506 if (iwqp->flush_issued || iwqp->sc_qp.qp_uk.destroy_pending) { 3507 spin_unlock_irqrestore(&iwqp->lock, flags); 3508 return; 3509 } 3510 3511 spin_unlock_irqrestore(&iwqp->lock, flags); 3512 3513 attr.qp_state = IB_QPS_ERR; 3514 irdma_modify_qp_roce(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); 3515 irdma_ib_qp_event(iwqp, qp->event_type); 3516 return; 3517 } 3518 3519 cm_id = iwqp->cm_id; 3520 original_hw_tcp_state = iwqp->hw_tcp_state; 3521 original_ibqp_state = iwqp->ibqp_state; 3522 last_ae = iwqp->last_aeq; 3523 3524 if (qp->term_flags) { 3525 issue_disconn = 1; 3526 issue_close = 1; 3527 iwqp->cm_id = NULL; 3528 irdma_terminate_del_timer(qp); 3529 if (!iwqp->flush_issued) { 3530 iwqp->flush_issued = 1; 3531 issue_flush = 1; 3532 } 3533 } else if ((original_hw_tcp_state == IRDMA_TCP_STATE_CLOSE_WAIT) || 3534 ((original_ibqp_state == IB_QPS_RTS) && 3535 (last_ae == IRDMA_AE_LLP_CONNECTION_RESET))) { 3536 issue_disconn = 1; 3537 if (last_ae == IRDMA_AE_LLP_CONNECTION_RESET) 3538 disconn_status = -ECONNRESET; 3539 } 3540 3541 if (original_hw_tcp_state == IRDMA_TCP_STATE_CLOSED || 3542 original_hw_tcp_state == IRDMA_TCP_STATE_TIME_WAIT || 3543 last_ae == IRDMA_AE_RDMAP_ROE_BAD_LLP_CLOSE || 3544 last_ae == IRDMA_AE_BAD_CLOSE || 3545 last_ae == IRDMA_AE_LLP_CONNECTION_RESET || iwdev->rf->reset || !cm_id) { 3546 issue_close = 1; 3547 iwqp->cm_id = NULL; 3548 qp->term_flags = 0; 3549 if (!iwqp->flush_issued) { 3550 iwqp->flush_issued = 1; 3551 issue_flush = 1; 3552 } 3553 } 3554 3555 spin_unlock_irqrestore(&iwqp->lock, flags); 3556 if (issue_flush && !iwqp->sc_qp.qp_uk.destroy_pending) { 3557 irdma_flush_wqes(iwqp, IRDMA_FLUSH_SQ | IRDMA_FLUSH_RQ | 3558 IRDMA_FLUSH_WAIT); 3559 3560 if (qp->term_flags) 3561 irdma_ib_qp_event(iwqp, qp->event_type); 3562 } 3563 3564 if (!cm_id || !cm_id->event_handler) 3565 return; 3566 3567 spin_lock_irqsave(&iwdev->cm_core.ht_lock, flags); 3568 if (!iwqp->cm_node) { 3569 spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags); 3570 return; 3571 } 3572 refcount_inc(&iwqp->cm_node->refcnt); 3573 3574 spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags); 3575 3576 if (issue_disconn) { 3577 err = irdma_send_cm_event(iwqp->cm_node, cm_id, 3578 IW_CM_EVENT_DISCONNECT, 3579 disconn_status); 3580 if (err) 3581 ibdev_dbg(&iwdev->ibdev, 3582 "CM: disconnect event failed: - cm_id = %p\n", 3583 cm_id); 3584 } 3585 if (issue_close) { 3586 cm_id->provider_data = iwqp; 3587 err = irdma_send_cm_event(iwqp->cm_node, cm_id, 3588 IW_CM_EVENT_CLOSE, 0); 3589 if (err) 3590 ibdev_dbg(&iwdev->ibdev, 3591 "CM: close event failed: - cm_id = %p\n", 3592 cm_id); 3593 irdma_qp_disconnect(iwqp); 3594 } 3595 irdma_rem_ref_cm_node(iwqp->cm_node); 3596 } 3597 3598 /** 3599 * irdma_disconnect_worker - worker for connection close 3600 * @work: points or disconn structure 3601 */ 3602 static void irdma_disconnect_worker(struct work_struct *work) 3603 { 3604 struct disconn_work *dwork = container_of(work, struct disconn_work, work); 3605 struct irdma_qp *iwqp = dwork->iwqp; 3606 3607 kfree(dwork); 3608 irdma_cm_disconn_true(iwqp); 3609 irdma_qp_rem_ref(&iwqp->ibqp); 3610 } 3611 3612 /** 3613 * irdma_free_lsmm_rsrc - free lsmm memory and deregister 3614 * @iwqp: associate qp for the connection 3615 */ 3616 void irdma_free_lsmm_rsrc(struct irdma_qp *iwqp) 3617 { 3618 struct irdma_device *iwdev; 3619 3620 iwdev = iwqp->iwdev; 3621 3622 if (iwqp->ietf_mem.va) { 3623 if (iwqp->lsmm_mr) 3624 iwdev->ibdev.ops.dereg_mr(iwqp->lsmm_mr, NULL); 3625 dma_free_coherent(iwdev->rf->sc_dev.hw->device, 3626 iwqp->ietf_mem.size, iwqp->ietf_mem.va, 3627 iwqp->ietf_mem.pa); 3628 iwqp->ietf_mem.va = NULL; 3629 } 3630 } 3631 3632 /** 3633 * irdma_accept - registered call for connection to be accepted 3634 * @cm_id: cm information for passive connection 3635 * @conn_param: accept parameters 3636 */ 3637 int irdma_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) 3638 { 3639 struct ib_qp *ibqp; 3640 struct irdma_qp *iwqp; 3641 struct irdma_device *iwdev; 3642 struct irdma_sc_dev *dev; 3643 struct irdma_cm_node *cm_node; 3644 struct ib_qp_attr attr = {}; 3645 int passive_state; 3646 struct ib_mr *ibmr; 3647 struct irdma_pd *iwpd; 3648 u16 buf_len = 0; 3649 struct irdma_kmem_info accept; 3650 u64 tagged_offset; 3651 int wait_ret; 3652 int ret = 0; 3653 3654 ibqp = irdma_get_qp(cm_id->device, conn_param->qpn); 3655 if (!ibqp) 3656 return -EINVAL; 3657 3658 iwqp = to_iwqp(ibqp); 3659 iwdev = iwqp->iwdev; 3660 dev = &iwdev->rf->sc_dev; 3661 cm_node = cm_id->provider_data; 3662 3663 if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) { 3664 cm_node->ipv4 = true; 3665 cm_node->vlan_id = irdma_get_vlan_ipv4(cm_node->loc_addr); 3666 } else { 3667 cm_node->ipv4 = false; 3668 irdma_get_vlan_mac_ipv6(cm_node->loc_addr, &cm_node->vlan_id, 3669 NULL); 3670 } 3671 ibdev_dbg(&iwdev->ibdev, "CM: Accept vlan_id=%d\n", 3672 cm_node->vlan_id); 3673 3674 trace_irdma_accept(cm_node, 0, NULL); 3675 3676 if (cm_node->state == IRDMA_CM_STATE_LISTENER_DESTROYED) { 3677 ret = -EINVAL; 3678 goto error; 3679 } 3680 3681 passive_state = atomic_add_return(1, &cm_node->passive_state); 3682 if (passive_state == IRDMA_SEND_RESET_EVENT) { 3683 ret = -ECONNRESET; 3684 goto error; 3685 } 3686 3687 buf_len = conn_param->private_data_len + IRDMA_MAX_IETF_SIZE; 3688 iwqp->ietf_mem.size = ALIGN(buf_len, 1); 3689 iwqp->ietf_mem.va = dma_alloc_coherent(dev->hw->device, 3690 iwqp->ietf_mem.size, 3691 &iwqp->ietf_mem.pa, GFP_KERNEL); 3692 if (!iwqp->ietf_mem.va) { 3693 ret = -ENOMEM; 3694 goto error; 3695 } 3696 3697 cm_node->pdata.size = conn_param->private_data_len; 3698 accept.addr = iwqp->ietf_mem.va; 3699 accept.size = irdma_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY); 3700 memcpy((u8 *)accept.addr + accept.size, conn_param->private_data, 3701 conn_param->private_data_len); 3702 3703 if (cm_node->dev->ws_add(iwqp->sc_qp.vsi, cm_node->user_pri)) { 3704 ret = -ENOMEM; 3705 goto error; 3706 } 3707 iwqp->sc_qp.user_pri = cm_node->user_pri; 3708 irdma_qp_add_qos(&iwqp->sc_qp); 3709 /* setup our first outgoing iWarp send WQE (the IETF frame response) */ 3710 iwpd = iwqp->iwpd; 3711 tagged_offset = (uintptr_t)iwqp->ietf_mem.va; 3712 ibmr = irdma_reg_phys_mr(&iwpd->ibpd, iwqp->ietf_mem.pa, buf_len, 3713 IB_ACCESS_LOCAL_WRITE, &tagged_offset); 3714 if (IS_ERR(ibmr)) { 3715 ret = -ENOMEM; 3716 goto error; 3717 } 3718 3719 ibmr->pd = &iwpd->ibpd; 3720 ibmr->device = iwpd->ibpd.device; 3721 iwqp->lsmm_mr = ibmr; 3722 if (iwqp->page) 3723 iwqp->sc_qp.qp_uk.sq_base = kmap_local_page(iwqp->page); 3724 3725 cm_node->lsmm_size = accept.size + conn_param->private_data_len; 3726 irdma_sc_send_lsmm(&iwqp->sc_qp, iwqp->ietf_mem.va, cm_node->lsmm_size, 3727 ibmr->lkey); 3728 3729 if (iwqp->page) 3730 kunmap_local(iwqp->sc_qp.qp_uk.sq_base); 3731 3732 iwqp->cm_id = cm_id; 3733 cm_node->cm_id = cm_id; 3734 3735 cm_id->provider_data = iwqp; 3736 iwqp->active_conn = 0; 3737 iwqp->cm_node = cm_node; 3738 cm_node->iwqp = iwqp; 3739 irdma_cm_init_tsa_conn(iwqp, cm_node); 3740 irdma_qp_add_ref(&iwqp->ibqp); 3741 cm_id->add_ref(cm_id); 3742 3743 attr.qp_state = IB_QPS_RTS; 3744 cm_node->qhash_set = false; 3745 cm_node->cm_core->cm_free_ah(cm_node); 3746 3747 irdma_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); 3748 if (dev->hw_attrs.uk_attrs.feature_flags & IRDMA_FEATURE_RTS_AE) { 3749 wait_ret = wait_event_interruptible_timeout(iwqp->waitq, 3750 iwqp->rts_ae_rcvd, 3751 IRDMA_MAX_TIMEOUT); 3752 if (!wait_ret) { 3753 ibdev_dbg(&iwdev->ibdev, 3754 "CM: Slow Connection: cm_node=%p, loc_port=%d, rem_port=%d, cm_id=%p\n", 3755 cm_node, cm_node->loc_port, 3756 cm_node->rem_port, cm_node->cm_id); 3757 ret = -ECONNRESET; 3758 goto error; 3759 } 3760 } 3761 3762 irdma_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0); 3763 cm_node->accelerated = true; 3764 complete(&cm_node->establish_comp); 3765 3766 if (cm_node->accept_pend) { 3767 atomic_dec(&cm_node->listener->pend_accepts_cnt); 3768 cm_node->accept_pend = 0; 3769 } 3770 3771 ibdev_dbg(&iwdev->ibdev, 3772 "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", 3773 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr, 3774 cm_node->loc_addr, cm_node, cm_id, ibqp->qp_num); 3775 cm_node->cm_core->stats_accepts++; 3776 3777 return 0; 3778 error: 3779 irdma_free_lsmm_rsrc(iwqp); 3780 irdma_rem_ref_cm_node(cm_node); 3781 3782 return ret; 3783 } 3784 3785 /** 3786 * irdma_reject - registered call for connection to be rejected 3787 * @cm_id: cm information for passive connection 3788 * @pdata: private data to be sent 3789 * @pdata_len: private data length 3790 */ 3791 int irdma_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len) 3792 { 3793 struct irdma_device *iwdev; 3794 struct irdma_cm_node *cm_node; 3795 3796 cm_node = cm_id->provider_data; 3797 cm_node->pdata.size = pdata_len; 3798 3799 trace_irdma_reject(cm_node, 0, NULL); 3800 3801 iwdev = to_iwdev(cm_id->device); 3802 if (!iwdev) 3803 return -EINVAL; 3804 3805 cm_node->cm_core->stats_rejects++; 3806 3807 if (pdata_len + sizeof(struct ietf_mpa_v2) > IRDMA_MAX_CM_BUF) 3808 return -EINVAL; 3809 3810 return irdma_cm_reject(cm_node, pdata, pdata_len); 3811 } 3812 3813 /** 3814 * irdma_connect - registered call for connection to be established 3815 * @cm_id: cm information for passive connection 3816 * @conn_param: Information about the connection 3817 */ 3818 int irdma_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) 3819 { 3820 struct ib_qp *ibqp; 3821 struct irdma_qp *iwqp; 3822 struct irdma_device *iwdev; 3823 struct irdma_cm_node *cm_node; 3824 struct irdma_cm_info cm_info; 3825 struct sockaddr_in *laddr; 3826 struct sockaddr_in *raddr; 3827 struct sockaddr_in6 *laddr6; 3828 struct sockaddr_in6 *raddr6; 3829 int ret = 0; 3830 3831 ibqp = irdma_get_qp(cm_id->device, conn_param->qpn); 3832 if (!ibqp) 3833 return -EINVAL; 3834 iwqp = to_iwqp(ibqp); 3835 if (!iwqp) 3836 return -EINVAL; 3837 iwdev = iwqp->iwdev; 3838 if (!iwdev) 3839 return -EINVAL; 3840 3841 laddr = (struct sockaddr_in *)&cm_id->m_local_addr; 3842 raddr = (struct sockaddr_in *)&cm_id->m_remote_addr; 3843 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr; 3844 raddr6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr; 3845 3846 if (!(laddr->sin_port) || !(raddr->sin_port)) 3847 return -EINVAL; 3848 3849 iwqp->active_conn = 1; 3850 iwqp->cm_id = NULL; 3851 cm_id->provider_data = iwqp; 3852 3853 /* set up the connection params for the node */ 3854 if (cm_id->remote_addr.ss_family == AF_INET) { 3855 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV4) 3856 return -EINVAL; 3857 3858 cm_info.ipv4 = true; 3859 memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr)); 3860 memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr)); 3861 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr); 3862 cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr); 3863 cm_info.loc_port = ntohs(laddr->sin_port); 3864 cm_info.rem_port = ntohs(raddr->sin_port); 3865 cm_info.vlan_id = irdma_get_vlan_ipv4(cm_info.loc_addr); 3866 } else { 3867 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV6) 3868 return -EINVAL; 3869 3870 cm_info.ipv4 = false; 3871 irdma_copy_ip_ntohl(cm_info.loc_addr, 3872 laddr6->sin6_addr.in6_u.u6_addr32); 3873 irdma_copy_ip_ntohl(cm_info.rem_addr, 3874 raddr6->sin6_addr.in6_u.u6_addr32); 3875 cm_info.loc_port = ntohs(laddr6->sin6_port); 3876 cm_info.rem_port = ntohs(raddr6->sin6_port); 3877 irdma_get_vlan_mac_ipv6(cm_info.loc_addr, &cm_info.vlan_id, 3878 NULL); 3879 } 3880 cm_info.cm_id = cm_id; 3881 cm_info.qh_qpid = iwdev->vsi.ilq->qp_id; 3882 cm_info.tos = cm_id->tos; 3883 if (iwdev->vsi.dscp_mode) { 3884 cm_info.user_pri = 3885 iwqp->sc_qp.vsi->dscp_map[irdma_tos2dscp(cm_info.tos)]; 3886 } else { 3887 cm_info.user_pri = rt_tos2priority(cm_id->tos); 3888 cm_info.user_pri = irdma_iw_get_vlan_prio(cm_info.loc_addr, 3889 cm_info.user_pri, 3890 cm_info.ipv4); 3891 } 3892 3893 if (iwqp->sc_qp.dev->ws_add(iwqp->sc_qp.vsi, cm_info.user_pri)) 3894 return -ENOMEM; 3895 iwqp->sc_qp.user_pri = cm_info.user_pri; 3896 irdma_qp_add_qos(&iwqp->sc_qp); 3897 ibdev_dbg(&iwdev->ibdev, "DCB: TOS:[%d] UP:[%d]\n", cm_id->tos, 3898 cm_info.user_pri); 3899 3900 trace_irdma_dcb_tos(iwdev, cm_id->tos, cm_info.user_pri); 3901 3902 ret = irdma_create_cm_node(&iwdev->cm_core, iwdev, conn_param, &cm_info, 3903 &cm_node); 3904 if (ret) 3905 return ret; 3906 ret = cm_node->cm_core->cm_create_ah(cm_node, true); 3907 if (ret) 3908 goto err; 3909 if (irdma_manage_qhash(iwdev, &cm_info, 3910 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 3911 IRDMA_QHASH_MANAGE_TYPE_ADD, NULL, true)) { 3912 ret = -EINVAL; 3913 goto err; 3914 } 3915 cm_node->qhash_set = true; 3916 3917 cm_node->apbvt_entry = irdma_add_apbvt(iwdev, cm_info.loc_port); 3918 if (!cm_node->apbvt_entry) { 3919 ret = -EINVAL; 3920 goto err; 3921 } 3922 3923 cm_node->apbvt_set = true; 3924 iwqp->cm_node = cm_node; 3925 cm_node->iwqp = iwqp; 3926 iwqp->cm_id = cm_id; 3927 irdma_qp_add_ref(&iwqp->ibqp); 3928 cm_id->add_ref(cm_id); 3929 3930 if (cm_node->state != IRDMA_CM_STATE_OFFLOADED) { 3931 cm_node->state = IRDMA_CM_STATE_SYN_SENT; 3932 ret = irdma_send_syn(cm_node, 0); 3933 if (ret) 3934 goto err; 3935 } 3936 3937 ibdev_dbg(&iwdev->ibdev, 3938 "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", 3939 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr, 3940 cm_node->loc_addr, cm_node, cm_id, ibqp->qp_num); 3941 3942 trace_irdma_connect(cm_node, 0, NULL); 3943 3944 return 0; 3945 3946 err: 3947 if (cm_info.ipv4) 3948 ibdev_dbg(&iwdev->ibdev, 3949 "CM: connect() FAILED: dest addr=%pI4", 3950 cm_info.rem_addr); 3951 else 3952 ibdev_dbg(&iwdev->ibdev, 3953 "CM: connect() FAILED: dest addr=%pI6", 3954 cm_info.rem_addr); 3955 irdma_rem_ref_cm_node(cm_node); 3956 iwdev->cm_core.stats_connect_errs++; 3957 3958 return ret; 3959 } 3960 3961 /** 3962 * irdma_create_listen - registered call creating listener 3963 * @cm_id: cm information for passive connection 3964 * @backlog: to max accept pending count 3965 */ 3966 int irdma_create_listen(struct iw_cm_id *cm_id, int backlog) 3967 { 3968 struct irdma_device *iwdev; 3969 struct irdma_cm_listener *cm_listen_node; 3970 struct irdma_cm_info cm_info = {}; 3971 struct sockaddr_in *laddr; 3972 struct sockaddr_in6 *laddr6; 3973 bool wildcard = false; 3974 int err; 3975 3976 iwdev = to_iwdev(cm_id->device); 3977 if (!iwdev) 3978 return -EINVAL; 3979 3980 laddr = (struct sockaddr_in *)&cm_id->m_local_addr; 3981 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr; 3982 cm_info.qh_qpid = iwdev->vsi.ilq->qp_id; 3983 3984 if (laddr->sin_family == AF_INET) { 3985 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV4) 3986 return -EINVAL; 3987 3988 cm_info.ipv4 = true; 3989 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr); 3990 cm_info.loc_port = ntohs(laddr->sin_port); 3991 3992 if (laddr->sin_addr.s_addr != htonl(INADDR_ANY)) { 3993 cm_info.vlan_id = irdma_get_vlan_ipv4(cm_info.loc_addr); 3994 } else { 3995 cm_info.vlan_id = 0xFFFF; 3996 wildcard = true; 3997 } 3998 } else { 3999 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV6) 4000 return -EINVAL; 4001 4002 cm_info.ipv4 = false; 4003 irdma_copy_ip_ntohl(cm_info.loc_addr, 4004 laddr6->sin6_addr.in6_u.u6_addr32); 4005 cm_info.loc_port = ntohs(laddr6->sin6_port); 4006 if (ipv6_addr_type(&laddr6->sin6_addr) != IPV6_ADDR_ANY) { 4007 irdma_get_vlan_mac_ipv6(cm_info.loc_addr, 4008 &cm_info.vlan_id, NULL); 4009 } else { 4010 cm_info.vlan_id = 0xFFFF; 4011 wildcard = true; 4012 } 4013 } 4014 4015 if (cm_info.vlan_id >= VLAN_N_VID && iwdev->dcb_vlan_mode) 4016 cm_info.vlan_id = 0; 4017 cm_info.backlog = backlog; 4018 cm_info.cm_id = cm_id; 4019 4020 trace_irdma_create_listen(iwdev, &cm_info); 4021 4022 cm_listen_node = irdma_make_listen_node(&iwdev->cm_core, iwdev, 4023 &cm_info); 4024 if (!cm_listen_node) { 4025 ibdev_dbg(&iwdev->ibdev, 4026 "CM: cm_listen_node == NULL\n"); 4027 return -ENOMEM; 4028 } 4029 4030 cm_id->provider_data = cm_listen_node; 4031 4032 cm_listen_node->tos = cm_id->tos; 4033 if (iwdev->vsi.dscp_mode) 4034 cm_listen_node->user_pri = 4035 iwdev->vsi.dscp_map[irdma_tos2dscp(cm_id->tos)]; 4036 else 4037 cm_listen_node->user_pri = rt_tos2priority(cm_id->tos); 4038 cm_info.user_pri = cm_listen_node->user_pri; 4039 if (!cm_listen_node->reused_node) { 4040 if (wildcard) { 4041 err = irdma_add_mqh(iwdev, &cm_info, cm_listen_node); 4042 if (err) 4043 goto error; 4044 } else { 4045 if (!iwdev->vsi.dscp_mode) 4046 cm_listen_node->user_pri = 4047 irdma_iw_get_vlan_prio(cm_info.loc_addr, 4048 cm_info.user_pri, 4049 cm_info.ipv4); 4050 cm_info.user_pri = cm_listen_node->user_pri; 4051 err = irdma_manage_qhash(iwdev, &cm_info, 4052 IRDMA_QHASH_TYPE_TCP_SYN, 4053 IRDMA_QHASH_MANAGE_TYPE_ADD, 4054 NULL, true); 4055 if (err) 4056 goto error; 4057 4058 cm_listen_node->qhash_set = true; 4059 } 4060 4061 cm_listen_node->apbvt_entry = irdma_add_apbvt(iwdev, 4062 cm_info.loc_port); 4063 if (!cm_listen_node->apbvt_entry) 4064 goto error; 4065 } 4066 cm_id->add_ref(cm_id); 4067 cm_listen_node->cm_core->stats_listen_created++; 4068 ibdev_dbg(&iwdev->ibdev, 4069 "CM: loc_port=0x%04x loc_addr=%pI4 cm_listen_node=%p cm_id=%p qhash_set=%d vlan_id=%d\n", 4070 cm_listen_node->loc_port, cm_listen_node->loc_addr, 4071 cm_listen_node, cm_listen_node->cm_id, 4072 cm_listen_node->qhash_set, cm_listen_node->vlan_id); 4073 4074 return 0; 4075 4076 error: 4077 4078 irdma_cm_del_listen(&iwdev->cm_core, cm_listen_node, false); 4079 4080 return -EINVAL; 4081 } 4082 4083 /** 4084 * irdma_destroy_listen - registered call to destroy listener 4085 * @cm_id: cm information for passive connection 4086 */ 4087 int irdma_destroy_listen(struct iw_cm_id *cm_id) 4088 { 4089 struct irdma_device *iwdev; 4090 4091 iwdev = to_iwdev(cm_id->device); 4092 if (cm_id->provider_data) 4093 irdma_cm_del_listen(&iwdev->cm_core, cm_id->provider_data, 4094 true); 4095 else 4096 ibdev_dbg(&iwdev->ibdev, 4097 "CM: cm_id->provider_data was NULL\n"); 4098 4099 cm_id->rem_ref(cm_id); 4100 4101 return 0; 4102 } 4103 4104 /** 4105 * irdma_teardown_list_prep - add conn nodes slated for tear down to list 4106 * @cm_core: cm's core 4107 * @teardown_list: a list to which cm_node will be selected 4108 * @ipaddr: pointer to ip address 4109 * @nfo: pointer to cm_info structure instance 4110 * @disconnect_all: flag indicating disconnect all QPs 4111 */ 4112 static void irdma_teardown_list_prep(struct irdma_cm_core *cm_core, 4113 struct list_head *teardown_list, 4114 u32 *ipaddr, 4115 struct irdma_cm_info *nfo, 4116 bool disconnect_all) 4117 { 4118 struct irdma_cm_node *cm_node; 4119 int bkt; 4120 4121 hash_for_each_rcu(cm_core->cm_hash_tbl, bkt, cm_node, list) { 4122 if ((disconnect_all || 4123 (nfo->vlan_id == cm_node->vlan_id && 4124 !memcmp(cm_node->loc_addr, ipaddr, nfo->ipv4 ? 4 : 16))) && 4125 refcount_inc_not_zero(&cm_node->refcnt)) 4126 list_add(&cm_node->teardown_entry, teardown_list); 4127 } 4128 } 4129 4130 /** 4131 * irdma_cm_event_connected - handle connected active node 4132 * @event: the info for cm_node of connection 4133 */ 4134 static void irdma_cm_event_connected(struct irdma_cm_event *event) 4135 { 4136 struct irdma_qp *iwqp; 4137 struct irdma_device *iwdev; 4138 struct irdma_cm_node *cm_node; 4139 struct irdma_sc_dev *dev; 4140 struct ib_qp_attr attr = {}; 4141 struct iw_cm_id *cm_id; 4142 int status; 4143 bool read0; 4144 int wait_ret = 0; 4145 4146 cm_node = event->cm_node; 4147 cm_id = cm_node->cm_id; 4148 iwqp = cm_id->provider_data; 4149 iwdev = iwqp->iwdev; 4150 dev = &iwdev->rf->sc_dev; 4151 if (iwqp->sc_qp.qp_uk.destroy_pending) { 4152 status = -ETIMEDOUT; 4153 goto error; 4154 } 4155 4156 irdma_cm_init_tsa_conn(iwqp, cm_node); 4157 read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO); 4158 if (iwqp->page) 4159 iwqp->sc_qp.qp_uk.sq_base = kmap_local_page(iwqp->page); 4160 irdma_sc_send_rtt(&iwqp->sc_qp, read0); 4161 if (iwqp->page) 4162 kunmap_local(iwqp->sc_qp.qp_uk.sq_base); 4163 4164 attr.qp_state = IB_QPS_RTS; 4165 cm_node->qhash_set = false; 4166 irdma_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); 4167 if (dev->hw_attrs.uk_attrs.feature_flags & IRDMA_FEATURE_RTS_AE) { 4168 wait_ret = wait_event_interruptible_timeout(iwqp->waitq, 4169 iwqp->rts_ae_rcvd, 4170 IRDMA_MAX_TIMEOUT); 4171 if (!wait_ret) 4172 ibdev_dbg(&iwdev->ibdev, 4173 "CM: Slow Connection: cm_node=%p, loc_port=%d, rem_port=%d, cm_id=%p\n", 4174 cm_node, cm_node->loc_port, 4175 cm_node->rem_port, cm_node->cm_id); 4176 } 4177 4178 irdma_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 0); 4179 cm_node->accelerated = true; 4180 complete(&cm_node->establish_comp); 4181 cm_node->cm_core->cm_free_ah(cm_node); 4182 return; 4183 4184 error: 4185 iwqp->cm_id = NULL; 4186 cm_id->provider_data = NULL; 4187 irdma_send_cm_event(event->cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 4188 status); 4189 irdma_rem_ref_cm_node(event->cm_node); 4190 } 4191 4192 /** 4193 * irdma_cm_event_reset - handle reset 4194 * @event: the info for cm_node of connection 4195 */ 4196 static void irdma_cm_event_reset(struct irdma_cm_event *event) 4197 { 4198 struct irdma_cm_node *cm_node = event->cm_node; 4199 struct iw_cm_id *cm_id = cm_node->cm_id; 4200 struct irdma_qp *iwqp; 4201 4202 if (!cm_id) 4203 return; 4204 4205 iwqp = cm_id->provider_data; 4206 if (!iwqp) 4207 return; 4208 4209 ibdev_dbg(&cm_node->iwdev->ibdev, 4210 "CM: reset event %p - cm_id = %p\n", event->cm_node, cm_id); 4211 iwqp->cm_id = NULL; 4212 4213 irdma_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT, 4214 -ECONNRESET); 4215 irdma_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0); 4216 } 4217 4218 /** 4219 * irdma_cm_event_handler - send event to cm upper layer 4220 * @work: pointer of cm event info. 4221 */ 4222 static void irdma_cm_event_handler(struct work_struct *work) 4223 { 4224 struct irdma_cm_event *event = container_of(work, struct irdma_cm_event, event_work); 4225 struct irdma_cm_node *cm_node; 4226 4227 if (!event || !event->cm_node || !event->cm_node->cm_core) 4228 return; 4229 4230 cm_node = event->cm_node; 4231 trace_irdma_cm_event_handler(cm_node, event->type, NULL); 4232 4233 switch (event->type) { 4234 case IRDMA_CM_EVENT_MPA_REQ: 4235 irdma_send_cm_event(cm_node, cm_node->cm_id, 4236 IW_CM_EVENT_CONNECT_REQUEST, 0); 4237 break; 4238 case IRDMA_CM_EVENT_RESET: 4239 irdma_cm_event_reset(event); 4240 break; 4241 case IRDMA_CM_EVENT_CONNECTED: 4242 if (!event->cm_node->cm_id || 4243 event->cm_node->state != IRDMA_CM_STATE_OFFLOADED) 4244 break; 4245 irdma_cm_event_connected(event); 4246 break; 4247 case IRDMA_CM_EVENT_MPA_REJECT: 4248 if (!event->cm_node->cm_id || 4249 cm_node->state == IRDMA_CM_STATE_OFFLOADED) 4250 break; 4251 irdma_send_cm_event(cm_node, cm_node->cm_id, 4252 IW_CM_EVENT_CONNECT_REPLY, -ECONNREFUSED); 4253 break; 4254 case IRDMA_CM_EVENT_ABORTED: 4255 if (!event->cm_node->cm_id || 4256 event->cm_node->state == IRDMA_CM_STATE_OFFLOADED) 4257 break; 4258 irdma_event_connect_error(event); 4259 break; 4260 default: 4261 ibdev_dbg(&cm_node->iwdev->ibdev, 4262 "CM: bad event type = %d\n", event->type); 4263 break; 4264 } 4265 4266 irdma_rem_ref_cm_node(event->cm_node); 4267 kfree(event); 4268 } 4269 4270 /** 4271 * irdma_cm_post_event - queue event request for worker thread 4272 * @event: cm node's info for up event call 4273 */ 4274 static void irdma_cm_post_event(struct irdma_cm_event *event) 4275 { 4276 refcount_inc(&event->cm_node->refcnt); 4277 INIT_WORK(&event->event_work, irdma_cm_event_handler); 4278 queue_work(event->cm_node->cm_core->event_wq, &event->event_work); 4279 } 4280 4281 /** 4282 * irdma_cm_teardown_connections - teardown QPs 4283 * @iwdev: device pointer 4284 * @ipaddr: Pointer to IPv4 or IPv6 address 4285 * @nfo: Connection info 4286 * @disconnect_all: flag indicating disconnect all QPs 4287 * 4288 * teardown QPs where source or destination addr matches ip addr 4289 */ 4290 void irdma_cm_teardown_connections(struct irdma_device *iwdev, u32 *ipaddr, 4291 struct irdma_cm_info *nfo, 4292 bool disconnect_all) 4293 { 4294 struct irdma_cm_core *cm_core = &iwdev->cm_core; 4295 struct list_head *list_core_temp; 4296 struct list_head *list_node; 4297 struct irdma_cm_node *cm_node; 4298 struct list_head teardown_list; 4299 struct ib_qp_attr attr; 4300 4301 INIT_LIST_HEAD(&teardown_list); 4302 4303 rcu_read_lock(); 4304 irdma_teardown_list_prep(cm_core, &teardown_list, ipaddr, nfo, disconnect_all); 4305 rcu_read_unlock(); 4306 4307 list_for_each_safe (list_node, list_core_temp, &teardown_list) { 4308 cm_node = container_of(list_node, struct irdma_cm_node, 4309 teardown_entry); 4310 attr.qp_state = IB_QPS_ERR; 4311 irdma_modify_qp(&cm_node->iwqp->ibqp, &attr, IB_QP_STATE, NULL); 4312 if (iwdev->rf->reset) 4313 irdma_cm_disconn(cm_node->iwqp); 4314 irdma_rem_ref_cm_node(cm_node); 4315 } 4316 } 4317 4318 /** 4319 * irdma_qhash_ctrl - enable/disable qhash for list 4320 * @iwdev: device pointer 4321 * @parent_listen_node: parent listen node 4322 * @nfo: cm info node 4323 * @ipaddr: Pointer to IPv4 or IPv6 address 4324 * @ipv4: flag indicating IPv4 when true 4325 * @ifup: flag indicating interface up when true 4326 * 4327 * Enables or disables the qhash for the node in the child 4328 * listen list that matches ipaddr. If no matching IP was found 4329 * it will allocate and add a new child listen node to the 4330 * parent listen node. The listen_list_lock is assumed to be 4331 * held when called. 4332 */ 4333 static void irdma_qhash_ctrl(struct irdma_device *iwdev, 4334 struct irdma_cm_listener *parent_listen_node, 4335 struct irdma_cm_info *nfo, u32 *ipaddr, bool ipv4, 4336 bool ifup) 4337 { 4338 struct list_head *child_listen_list = &parent_listen_node->child_listen_list; 4339 struct irdma_cm_listener *child_listen_node; 4340 struct list_head *pos, *tpos; 4341 bool node_allocated = false; 4342 enum irdma_quad_hash_manage_type op = ifup ? 4343 IRDMA_QHASH_MANAGE_TYPE_ADD : 4344 IRDMA_QHASH_MANAGE_TYPE_DELETE; 4345 int err; 4346 4347 list_for_each_safe (pos, tpos, child_listen_list) { 4348 child_listen_node = list_entry(pos, struct irdma_cm_listener, 4349 child_listen_list); 4350 if (!memcmp(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16)) 4351 goto set_qhash; 4352 } 4353 4354 /* if not found then add a child listener if interface is going up */ 4355 if (!ifup) 4356 return; 4357 child_listen_node = kmemdup(parent_listen_node, 4358 sizeof(*child_listen_node), GFP_ATOMIC); 4359 if (!child_listen_node) 4360 return; 4361 4362 node_allocated = true; 4363 memcpy(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16); 4364 4365 set_qhash: 4366 memcpy(nfo->loc_addr, child_listen_node->loc_addr, 4367 sizeof(nfo->loc_addr)); 4368 nfo->vlan_id = child_listen_node->vlan_id; 4369 err = irdma_manage_qhash(iwdev, nfo, IRDMA_QHASH_TYPE_TCP_SYN, op, NULL, 4370 false); 4371 if (!err) { 4372 child_listen_node->qhash_set = ifup; 4373 if (node_allocated) 4374 list_add(&child_listen_node->child_listen_list, 4375 &parent_listen_node->child_listen_list); 4376 } else if (node_allocated) { 4377 kfree(child_listen_node); 4378 } 4379 } 4380 4381 /** 4382 * irdma_if_notify - process an ifdown on an interface 4383 * @iwdev: device pointer 4384 * @netdev: network device structure 4385 * @ipaddr: Pointer to IPv4 or IPv6 address 4386 * @ipv4: flag indicating IPv4 when true 4387 * @ifup: flag indicating interface up when true 4388 */ 4389 void irdma_if_notify(struct irdma_device *iwdev, struct net_device *netdev, 4390 u32 *ipaddr, bool ipv4, bool ifup) 4391 { 4392 struct irdma_cm_core *cm_core = &iwdev->cm_core; 4393 unsigned long flags; 4394 struct irdma_cm_listener *listen_node; 4395 static const u32 ip_zero[4] = { 0, 0, 0, 0 }; 4396 struct irdma_cm_info nfo = {}; 4397 u16 vlan_id = rdma_vlan_dev_vlan_id(netdev); 4398 enum irdma_quad_hash_manage_type op = ifup ? 4399 IRDMA_QHASH_MANAGE_TYPE_ADD : 4400 IRDMA_QHASH_MANAGE_TYPE_DELETE; 4401 4402 nfo.vlan_id = vlan_id; 4403 nfo.ipv4 = ipv4; 4404 nfo.qh_qpid = 1; 4405 4406 /* Disable or enable qhash for listeners */ 4407 spin_lock_irqsave(&cm_core->listen_list_lock, flags); 4408 list_for_each_entry (listen_node, &cm_core->listen_list, list) { 4409 if (vlan_id != listen_node->vlan_id || 4410 (memcmp(listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16) && 4411 memcmp(listen_node->loc_addr, ip_zero, ipv4 ? 4 : 16))) 4412 continue; 4413 4414 memcpy(nfo.loc_addr, listen_node->loc_addr, 4415 sizeof(nfo.loc_addr)); 4416 nfo.loc_port = listen_node->loc_port; 4417 nfo.user_pri = listen_node->user_pri; 4418 if (!list_empty(&listen_node->child_listen_list)) { 4419 irdma_qhash_ctrl(iwdev, listen_node, &nfo, ipaddr, ipv4, 4420 ifup); 4421 } else if (memcmp(listen_node->loc_addr, ip_zero, 4422 ipv4 ? 4 : 16)) { 4423 if (!irdma_manage_qhash(iwdev, &nfo, 4424 IRDMA_QHASH_TYPE_TCP_SYN, op, 4425 NULL, false)) 4426 listen_node->qhash_set = ifup; 4427 } 4428 } 4429 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); 4430 4431 /* disconnect any connected qp's on ifdown */ 4432 if (!ifup) 4433 irdma_cm_teardown_connections(iwdev, ipaddr, &nfo, false); 4434 } 4435