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_obj(*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_obj(*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_obj(*child_listen_node); 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_obj(*child_listen_node); 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 int ret; 2245 2246 /* create an hte and cm_node for this instance */ 2247 cm_node = kzalloc_obj(*cm_node, GFP_ATOMIC); 2248 if (!cm_node) 2249 return ERR_PTR(-ENOMEM); 2250 2251 /* set our node specific transport info */ 2252 cm_node->ipv4 = cm_info->ipv4; 2253 cm_node->vlan_id = cm_info->vlan_id; 2254 if (cm_node->vlan_id >= VLAN_N_VID && iwdev->dcb_vlan_mode) 2255 cm_node->vlan_id = 0; 2256 cm_node->tos = cm_info->tos; 2257 cm_node->user_pri = cm_info->user_pri; 2258 if (listener) { 2259 if (listener->tos != cm_info->tos) 2260 ibdev_warn(&iwdev->ibdev, 2261 "application TOS[%d] and remote client TOS[%d] mismatch\n", 2262 listener->tos, cm_info->tos); 2263 if (iwdev->vsi.dscp_mode) { 2264 cm_node->user_pri = listener->user_pri; 2265 } else { 2266 cm_node->tos = max(listener->tos, cm_info->tos); 2267 cm_node->user_pri = rt_tos2priority(cm_node->tos); 2268 cm_node->user_pri = 2269 irdma_iw_get_vlan_prio(cm_info->loc_addr, 2270 cm_node->user_pri, 2271 cm_info->ipv4); 2272 } 2273 ibdev_dbg(&iwdev->ibdev, 2274 "DCB: listener: TOS:[%d] UP:[%d]\n", cm_node->tos, 2275 cm_node->user_pri); 2276 trace_irdma_listener_tos(iwdev, cm_node->tos, 2277 cm_node->user_pri); 2278 } 2279 memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr)); 2280 memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr)); 2281 cm_node->loc_port = cm_info->loc_port; 2282 cm_node->rem_port = cm_info->rem_port; 2283 2284 cm_node->mpa_frame_rev = IRDMA_CM_DEFAULT_MPA_VER; 2285 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO; 2286 cm_node->iwdev = iwdev; 2287 cm_node->dev = &iwdev->rf->sc_dev; 2288 2289 cm_node->ird_size = cm_node->dev->hw_attrs.max_hw_ird; 2290 cm_node->ord_size = cm_node->dev->hw_attrs.max_hw_ord; 2291 2292 cm_node->listener = listener; 2293 cm_node->cm_id = cm_info->cm_id; 2294 ether_addr_copy(cm_node->loc_mac, netdev->dev_addr); 2295 spin_lock_init(&cm_node->retrans_list_lock); 2296 cm_node->ack_rcvd = false; 2297 2298 init_completion(&cm_node->establish_comp); 2299 refcount_set(&cm_node->refcnt, 1); 2300 /* associate our parent CM core */ 2301 cm_node->cm_core = cm_core; 2302 cm_node->tcp_cntxt.loc_id = IRDMA_CM_DEFAULT_LOCAL_ID; 2303 cm_node->tcp_cntxt.rcv_wscale = iwdev->rcv_wscale; 2304 cm_node->tcp_cntxt.rcv_wnd = iwdev->rcv_wnd >> cm_node->tcp_cntxt.rcv_wscale; 2305 if (cm_node->ipv4) { 2306 cm_node->tcp_cntxt.loc_seq_num = secure_tcp_seq(htonl(cm_node->loc_addr[0]), 2307 htonl(cm_node->rem_addr[0]), 2308 htons(cm_node->loc_port), 2309 htons(cm_node->rem_port)); 2310 cm_node->tcp_cntxt.mss = iwdev->vsi.mtu - IRDMA_MTU_TO_MSS_IPV4; 2311 } else if (IS_ENABLED(CONFIG_IPV6)) { 2312 __be32 loc[4] = { 2313 htonl(cm_node->loc_addr[0]), htonl(cm_node->loc_addr[1]), 2314 htonl(cm_node->loc_addr[2]), htonl(cm_node->loc_addr[3]) 2315 }; 2316 __be32 rem[4] = { 2317 htonl(cm_node->rem_addr[0]), htonl(cm_node->rem_addr[1]), 2318 htonl(cm_node->rem_addr[2]), htonl(cm_node->rem_addr[3]) 2319 }; 2320 cm_node->tcp_cntxt.loc_seq_num = secure_tcpv6_seq(loc, rem, 2321 htons(cm_node->loc_port), 2322 htons(cm_node->rem_port)); 2323 cm_node->tcp_cntxt.mss = iwdev->vsi.mtu - IRDMA_MTU_TO_MSS_IPV6; 2324 } 2325 2326 if ((cm_node->ipv4 && 2327 irdma_ipv4_is_lpb(cm_node->loc_addr[0], cm_node->rem_addr[0])) || 2328 (!cm_node->ipv4 && 2329 irdma_ipv6_is_lpb(cm_node->loc_addr, cm_node->rem_addr))) { 2330 cm_node->do_lpb = true; 2331 arpindex = irdma_arp_table(iwdev->rf, cm_node->rem_addr, 2332 cm_node->ipv4, NULL, 2333 IRDMA_ARP_RESOLVE); 2334 } else { 2335 oldarpindex = irdma_arp_table(iwdev->rf, cm_node->rem_addr, 2336 cm_node->ipv4, NULL, 2337 IRDMA_ARP_RESOLVE); 2338 if (cm_node->ipv4) 2339 arpindex = irdma_addr_resolve_neigh(iwdev, 2340 cm_info->loc_addr[0], 2341 cm_info->rem_addr[0], 2342 oldarpindex); 2343 else if (IS_ENABLED(CONFIG_IPV6)) 2344 arpindex = irdma_addr_resolve_neigh_ipv6(iwdev, 2345 cm_info->loc_addr, 2346 cm_info->rem_addr, 2347 oldarpindex); 2348 else 2349 arpindex = -EINVAL; 2350 } 2351 2352 if (arpindex < 0) { 2353 ret = -EINVAL; 2354 goto err; 2355 } 2356 2357 ether_addr_copy(cm_node->rem_mac, 2358 iwdev->rf->arp_table[arpindex].mac_addr); 2359 irdma_add_hte_node(cm_core, cm_node); 2360 cm_core->stats_nodes_created++; 2361 return cm_node; 2362 2363 err: 2364 kfree(cm_node); 2365 2366 return ERR_PTR(ret); 2367 } 2368 2369 static void irdma_destroy_connection(struct irdma_cm_node *cm_node) 2370 { 2371 struct irdma_cm_core *cm_core = cm_node->cm_core; 2372 struct irdma_qp *iwqp; 2373 struct irdma_cm_info nfo; 2374 2375 /* if the node is destroyed before connection was accelerated */ 2376 if (!cm_node->accelerated && cm_node->accept_pend) { 2377 ibdev_dbg(&cm_node->iwdev->ibdev, 2378 "CM: node destroyed before established\n"); 2379 atomic_dec(&cm_node->listener->pend_accepts_cnt); 2380 } 2381 if (cm_node->close_entry) 2382 irdma_handle_close_entry(cm_node, 0); 2383 if (cm_node->listener) { 2384 irdma_dec_refcnt_listen(cm_core, cm_node->listener, 0, true); 2385 } else { 2386 if (cm_node->apbvt_set) { 2387 irdma_del_apbvt(cm_node->iwdev, cm_node->apbvt_entry); 2388 cm_node->apbvt_set = 0; 2389 } 2390 irdma_get_addr_info(cm_node, &nfo); 2391 if (cm_node->qhash_set) { 2392 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id; 2393 irdma_manage_qhash(cm_node->iwdev, &nfo, 2394 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 2395 IRDMA_QHASH_MANAGE_TYPE_DELETE, NULL, 2396 false); 2397 cm_node->qhash_set = 0; 2398 } 2399 } 2400 2401 iwqp = cm_node->iwqp; 2402 if (iwqp) { 2403 cm_node->cm_id->rem_ref(cm_node->cm_id); 2404 cm_node->cm_id = NULL; 2405 iwqp->cm_id = NULL; 2406 irdma_qp_rem_ref(&iwqp->ibqp); 2407 cm_node->iwqp = NULL; 2408 } else if (cm_node->qhash_set) { 2409 irdma_get_addr_info(cm_node, &nfo); 2410 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id; 2411 irdma_manage_qhash(cm_node->iwdev, &nfo, 2412 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 2413 IRDMA_QHASH_MANAGE_TYPE_DELETE, NULL, false); 2414 cm_node->qhash_set = 0; 2415 } 2416 2417 cm_core->cm_free_ah(cm_node); 2418 } 2419 2420 /** 2421 * irdma_rem_ref_cm_node - destroy an instance of a cm node 2422 * @cm_node: connection's node 2423 */ 2424 void irdma_rem_ref_cm_node(struct irdma_cm_node *cm_node) 2425 { 2426 struct irdma_cm_core *cm_core = cm_node->cm_core; 2427 unsigned long flags; 2428 2429 trace_irdma_rem_ref_cm_node(cm_node, 0, __builtin_return_address(0)); 2430 spin_lock_irqsave(&cm_core->ht_lock, flags); 2431 2432 if (!refcount_dec_and_test(&cm_node->refcnt)) { 2433 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 2434 return; 2435 } 2436 if (cm_node->iwqp) { 2437 cm_node->iwqp->cm_node = NULL; 2438 cm_node->iwqp->cm_id = NULL; 2439 } 2440 hash_del_rcu(&cm_node->list); 2441 cm_node->cm_core->stats_nodes_destroyed++; 2442 2443 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 2444 2445 irdma_destroy_connection(cm_node); 2446 2447 kfree_rcu(cm_node, rcu_head); 2448 } 2449 2450 /** 2451 * irdma_handle_fin_pkt - FIN packet received 2452 * @cm_node: connection's node 2453 */ 2454 static void irdma_handle_fin_pkt(struct irdma_cm_node *cm_node) 2455 { 2456 switch (cm_node->state) { 2457 case IRDMA_CM_STATE_SYN_RCVD: 2458 case IRDMA_CM_STATE_SYN_SENT: 2459 case IRDMA_CM_STATE_ESTABLISHED: 2460 case IRDMA_CM_STATE_MPAREJ_RCVD: 2461 cm_node->tcp_cntxt.rcv_nxt++; 2462 irdma_cleanup_retrans_entry(cm_node); 2463 cm_node->state = IRDMA_CM_STATE_LAST_ACK; 2464 irdma_send_fin(cm_node); 2465 break; 2466 case IRDMA_CM_STATE_MPAREQ_SENT: 2467 irdma_create_event(cm_node, IRDMA_CM_EVENT_ABORTED); 2468 cm_node->tcp_cntxt.rcv_nxt++; 2469 irdma_cleanup_retrans_entry(cm_node); 2470 cm_node->state = IRDMA_CM_STATE_CLOSED; 2471 refcount_inc(&cm_node->refcnt); 2472 irdma_send_reset(cm_node); 2473 break; 2474 case IRDMA_CM_STATE_FIN_WAIT1: 2475 cm_node->tcp_cntxt.rcv_nxt++; 2476 irdma_cleanup_retrans_entry(cm_node); 2477 cm_node->state = IRDMA_CM_STATE_CLOSING; 2478 irdma_send_ack(cm_node); 2479 /* 2480 * Wait for ACK as this is simultaneous close. 2481 * After we receive ACK, do not send anything. 2482 * Just rm the node. 2483 */ 2484 break; 2485 case IRDMA_CM_STATE_FIN_WAIT2: 2486 cm_node->tcp_cntxt.rcv_nxt++; 2487 irdma_cleanup_retrans_entry(cm_node); 2488 cm_node->state = IRDMA_CM_STATE_TIME_WAIT; 2489 irdma_send_ack(cm_node); 2490 irdma_schedule_cm_timer(cm_node, NULL, IRDMA_TIMER_TYPE_CLOSE, 2491 1, 0); 2492 break; 2493 case IRDMA_CM_STATE_TIME_WAIT: 2494 cm_node->tcp_cntxt.rcv_nxt++; 2495 irdma_cleanup_retrans_entry(cm_node); 2496 cm_node->state = IRDMA_CM_STATE_CLOSED; 2497 irdma_rem_ref_cm_node(cm_node); 2498 break; 2499 case IRDMA_CM_STATE_OFFLOADED: 2500 default: 2501 ibdev_dbg(&cm_node->iwdev->ibdev, 2502 "CM: bad state node state = %d\n", cm_node->state); 2503 break; 2504 } 2505 } 2506 2507 /** 2508 * irdma_handle_rst_pkt - process received RST packet 2509 * @cm_node: connection's node 2510 * @rbuf: receive buffer 2511 */ 2512 static void irdma_handle_rst_pkt(struct irdma_cm_node *cm_node, 2513 struct irdma_puda_buf *rbuf) 2514 { 2515 ibdev_dbg(&cm_node->iwdev->ibdev, 2516 "CM: caller: %pS cm_node=%p state=%d rem_port=0x%04x loc_port=0x%04x rem_addr=%pI4 loc_addr=%pI4\n", 2517 __builtin_return_address(0), cm_node, cm_node->state, 2518 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr, 2519 cm_node->loc_addr); 2520 2521 irdma_cleanup_retrans_entry(cm_node); 2522 switch (cm_node->state) { 2523 case IRDMA_CM_STATE_SYN_SENT: 2524 case IRDMA_CM_STATE_MPAREQ_SENT: 2525 switch (cm_node->mpa_frame_rev) { 2526 case IETF_MPA_V2: 2527 /* Drop down to MPA_V1*/ 2528 cm_node->mpa_frame_rev = IETF_MPA_V1; 2529 /* send a syn and goto syn sent state */ 2530 cm_node->state = IRDMA_CM_STATE_SYN_SENT; 2531 if (irdma_send_syn(cm_node, 0)) 2532 irdma_active_open_err(cm_node, false); 2533 break; 2534 case IETF_MPA_V1: 2535 default: 2536 irdma_active_open_err(cm_node, false); 2537 break; 2538 } 2539 break; 2540 case IRDMA_CM_STATE_MPAREQ_RCVD: 2541 atomic_inc(&cm_node->passive_state); 2542 break; 2543 case IRDMA_CM_STATE_ESTABLISHED: 2544 case IRDMA_CM_STATE_SYN_RCVD: 2545 case IRDMA_CM_STATE_LISTENING: 2546 irdma_passive_open_err(cm_node, false); 2547 break; 2548 case IRDMA_CM_STATE_OFFLOADED: 2549 irdma_active_open_err(cm_node, false); 2550 break; 2551 case IRDMA_CM_STATE_CLOSED: 2552 break; 2553 case IRDMA_CM_STATE_FIN_WAIT2: 2554 case IRDMA_CM_STATE_FIN_WAIT1: 2555 case IRDMA_CM_STATE_LAST_ACK: 2556 case IRDMA_CM_STATE_TIME_WAIT: 2557 cm_node->state = IRDMA_CM_STATE_CLOSED; 2558 irdma_rem_ref_cm_node(cm_node); 2559 break; 2560 default: 2561 break; 2562 } 2563 } 2564 2565 /** 2566 * irdma_handle_rcv_mpa - Process a recv'd mpa buffer 2567 * @cm_node: connection's node 2568 * @rbuf: receive buffer 2569 */ 2570 static void irdma_handle_rcv_mpa(struct irdma_cm_node *cm_node, 2571 struct irdma_puda_buf *rbuf) 2572 { 2573 int err; 2574 int datasize = rbuf->datalen; 2575 u8 *dataloc = rbuf->data; 2576 2577 enum irdma_cm_event_type type = IRDMA_CM_EVENT_UNKNOWN; 2578 u32 res_type; 2579 2580 err = irdma_parse_mpa(cm_node, dataloc, &res_type, datasize); 2581 if (err) { 2582 if (cm_node->state == IRDMA_CM_STATE_MPAREQ_SENT) 2583 irdma_active_open_err(cm_node, true); 2584 else 2585 irdma_passive_open_err(cm_node, true); 2586 return; 2587 } 2588 2589 switch (cm_node->state) { 2590 case IRDMA_CM_STATE_ESTABLISHED: 2591 if (res_type == IRDMA_MPA_REQUEST_REJECT) 2592 ibdev_dbg(&cm_node->iwdev->ibdev, 2593 "CM: state for reject\n"); 2594 cm_node->state = IRDMA_CM_STATE_MPAREQ_RCVD; 2595 type = IRDMA_CM_EVENT_MPA_REQ; 2596 irdma_send_ack(cm_node); /* ACK received MPA request */ 2597 atomic_set(&cm_node->passive_state, 2598 IRDMA_PASSIVE_STATE_INDICATED); 2599 break; 2600 case IRDMA_CM_STATE_MPAREQ_SENT: 2601 irdma_cleanup_retrans_entry(cm_node); 2602 if (res_type == IRDMA_MPA_REQUEST_REJECT) { 2603 type = IRDMA_CM_EVENT_MPA_REJECT; 2604 cm_node->state = IRDMA_CM_STATE_MPAREJ_RCVD; 2605 } else { 2606 type = IRDMA_CM_EVENT_CONNECTED; 2607 cm_node->state = IRDMA_CM_STATE_OFFLOADED; 2608 } 2609 irdma_send_ack(cm_node); 2610 break; 2611 default: 2612 ibdev_dbg(&cm_node->iwdev->ibdev, 2613 "CM: wrong cm_node state =%d\n", cm_node->state); 2614 break; 2615 } 2616 irdma_create_event(cm_node, type); 2617 } 2618 2619 /** 2620 * irdma_check_syn - Check for error on received syn ack 2621 * @cm_node: connection's node 2622 * @tcph: pointer tcp header 2623 */ 2624 static int irdma_check_syn(struct irdma_cm_node *cm_node, struct tcphdr *tcph) 2625 { 2626 if (ntohl(tcph->ack_seq) != cm_node->tcp_cntxt.loc_seq_num) { 2627 irdma_active_open_err(cm_node, true); 2628 return 1; 2629 } 2630 2631 return 0; 2632 } 2633 2634 /** 2635 * irdma_check_seq - check seq numbers if OK 2636 * @cm_node: connection's node 2637 * @tcph: pointer tcp header 2638 */ 2639 static int irdma_check_seq(struct irdma_cm_node *cm_node, struct tcphdr *tcph) 2640 { 2641 u32 seq; 2642 u32 ack_seq; 2643 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num; 2644 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt; 2645 u32 rcv_wnd; 2646 int err = 0; 2647 2648 seq = ntohl(tcph->seq); 2649 ack_seq = ntohl(tcph->ack_seq); 2650 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd; 2651 if (ack_seq != loc_seq_num || 2652 !between(seq, rcv_nxt, (rcv_nxt + rcv_wnd))) 2653 err = -1; 2654 if (err) 2655 ibdev_dbg(&cm_node->iwdev->ibdev, 2656 "CM: seq number err\n"); 2657 2658 return err; 2659 } 2660 2661 void irdma_add_conn_est_qh(struct irdma_cm_node *cm_node) 2662 { 2663 struct irdma_cm_info nfo; 2664 2665 irdma_get_addr_info(cm_node, &nfo); 2666 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id; 2667 irdma_manage_qhash(cm_node->iwdev, &nfo, 2668 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 2669 IRDMA_QHASH_MANAGE_TYPE_ADD, 2670 cm_node, false); 2671 cm_node->qhash_set = true; 2672 } 2673 2674 /** 2675 * irdma_handle_syn_pkt - is for Passive node 2676 * @cm_node: connection's node 2677 * @rbuf: receive buffer 2678 */ 2679 static void irdma_handle_syn_pkt(struct irdma_cm_node *cm_node, 2680 struct irdma_puda_buf *rbuf) 2681 { 2682 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2683 int err; 2684 u32 inc_sequence; 2685 int optionsize; 2686 2687 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); 2688 inc_sequence = ntohl(tcph->seq); 2689 2690 switch (cm_node->state) { 2691 case IRDMA_CM_STATE_SYN_SENT: 2692 case IRDMA_CM_STATE_MPAREQ_SENT: 2693 /* Rcvd syn on active open connection */ 2694 irdma_active_open_err(cm_node, 1); 2695 break; 2696 case IRDMA_CM_STATE_LISTENING: 2697 /* Passive OPEN */ 2698 if (atomic_read(&cm_node->listener->pend_accepts_cnt) > 2699 cm_node->listener->backlog) { 2700 cm_node->cm_core->stats_backlog_drops++; 2701 irdma_passive_open_err(cm_node, false); 2702 break; 2703 } 2704 err = irdma_handle_tcp_options(cm_node, tcph, optionsize, 1); 2705 if (err) { 2706 irdma_passive_open_err(cm_node, false); 2707 /* drop pkt */ 2708 break; 2709 } 2710 err = cm_node->cm_core->cm_create_ah(cm_node, false); 2711 if (err) { 2712 irdma_passive_open_err(cm_node, false); 2713 /* drop pkt */ 2714 break; 2715 } 2716 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; 2717 cm_node->accept_pend = 1; 2718 atomic_inc(&cm_node->listener->pend_accepts_cnt); 2719 2720 cm_node->state = IRDMA_CM_STATE_SYN_RCVD; 2721 break; 2722 case IRDMA_CM_STATE_CLOSED: 2723 irdma_cleanup_retrans_entry(cm_node); 2724 refcount_inc(&cm_node->refcnt); 2725 irdma_send_reset(cm_node); 2726 break; 2727 case IRDMA_CM_STATE_OFFLOADED: 2728 case IRDMA_CM_STATE_ESTABLISHED: 2729 case IRDMA_CM_STATE_FIN_WAIT1: 2730 case IRDMA_CM_STATE_FIN_WAIT2: 2731 case IRDMA_CM_STATE_MPAREQ_RCVD: 2732 case IRDMA_CM_STATE_LAST_ACK: 2733 case IRDMA_CM_STATE_CLOSING: 2734 case IRDMA_CM_STATE_UNKNOWN: 2735 default: 2736 break; 2737 } 2738 } 2739 2740 /** 2741 * irdma_handle_synack_pkt - Process SYN+ACK packet (active side) 2742 * @cm_node: connection's node 2743 * @rbuf: receive buffer 2744 */ 2745 static void irdma_handle_synack_pkt(struct irdma_cm_node *cm_node, 2746 struct irdma_puda_buf *rbuf) 2747 { 2748 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2749 int err; 2750 u32 inc_sequence; 2751 int optionsize; 2752 2753 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); 2754 inc_sequence = ntohl(tcph->seq); 2755 switch (cm_node->state) { 2756 case IRDMA_CM_STATE_SYN_SENT: 2757 irdma_cleanup_retrans_entry(cm_node); 2758 /* active open */ 2759 if (irdma_check_syn(cm_node, tcph)) { 2760 ibdev_dbg(&cm_node->iwdev->ibdev, 2761 "CM: check syn fail\n"); 2762 return; 2763 } 2764 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); 2765 /* setup options */ 2766 err = irdma_handle_tcp_options(cm_node, tcph, optionsize, 0); 2767 if (err) { 2768 ibdev_dbg(&cm_node->iwdev->ibdev, 2769 "CM: cm_node=%p tcp_options failed\n", 2770 cm_node); 2771 break; 2772 } 2773 irdma_cleanup_retrans_entry(cm_node); 2774 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; 2775 irdma_send_ack(cm_node); /* ACK for the syn_ack */ 2776 err = irdma_send_mpa_request(cm_node); 2777 if (err) { 2778 ibdev_dbg(&cm_node->iwdev->ibdev, 2779 "CM: cm_node=%p irdma_send_mpa_request failed\n", 2780 cm_node); 2781 break; 2782 } 2783 cm_node->state = IRDMA_CM_STATE_MPAREQ_SENT; 2784 break; 2785 case IRDMA_CM_STATE_MPAREQ_RCVD: 2786 irdma_passive_open_err(cm_node, true); 2787 break; 2788 case IRDMA_CM_STATE_LISTENING: 2789 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq); 2790 irdma_cleanup_retrans_entry(cm_node); 2791 cm_node->state = IRDMA_CM_STATE_CLOSED; 2792 irdma_send_reset(cm_node); 2793 break; 2794 case IRDMA_CM_STATE_CLOSED: 2795 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq); 2796 irdma_cleanup_retrans_entry(cm_node); 2797 refcount_inc(&cm_node->refcnt); 2798 irdma_send_reset(cm_node); 2799 break; 2800 case IRDMA_CM_STATE_ESTABLISHED: 2801 case IRDMA_CM_STATE_FIN_WAIT1: 2802 case IRDMA_CM_STATE_FIN_WAIT2: 2803 case IRDMA_CM_STATE_LAST_ACK: 2804 case IRDMA_CM_STATE_OFFLOADED: 2805 case IRDMA_CM_STATE_CLOSING: 2806 case IRDMA_CM_STATE_UNKNOWN: 2807 case IRDMA_CM_STATE_MPAREQ_SENT: 2808 default: 2809 break; 2810 } 2811 } 2812 2813 /** 2814 * irdma_handle_ack_pkt - process packet with ACK 2815 * @cm_node: connection's node 2816 * @rbuf: receive buffer 2817 */ 2818 static int irdma_handle_ack_pkt(struct irdma_cm_node *cm_node, 2819 struct irdma_puda_buf *rbuf) 2820 { 2821 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2822 u32 inc_sequence; 2823 int ret; 2824 int optionsize; 2825 u32 datasize = rbuf->datalen; 2826 2827 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); 2828 2829 if (irdma_check_seq(cm_node, tcph)) 2830 return -EINVAL; 2831 2832 inc_sequence = ntohl(tcph->seq); 2833 switch (cm_node->state) { 2834 case IRDMA_CM_STATE_SYN_RCVD: 2835 irdma_cleanup_retrans_entry(cm_node); 2836 ret = irdma_handle_tcp_options(cm_node, tcph, optionsize, 1); 2837 if (ret) 2838 return ret; 2839 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); 2840 cm_node->state = IRDMA_CM_STATE_ESTABLISHED; 2841 if (datasize) { 2842 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; 2843 irdma_handle_rcv_mpa(cm_node, rbuf); 2844 } 2845 break; 2846 case IRDMA_CM_STATE_ESTABLISHED: 2847 irdma_cleanup_retrans_entry(cm_node); 2848 if (datasize) { 2849 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; 2850 irdma_handle_rcv_mpa(cm_node, rbuf); 2851 } 2852 break; 2853 case IRDMA_CM_STATE_MPAREQ_SENT: 2854 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); 2855 if (datasize) { 2856 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; 2857 cm_node->ack_rcvd = false; 2858 irdma_handle_rcv_mpa(cm_node, rbuf); 2859 } else { 2860 cm_node->ack_rcvd = true; 2861 } 2862 break; 2863 case IRDMA_CM_STATE_LISTENING: 2864 irdma_cleanup_retrans_entry(cm_node); 2865 cm_node->state = IRDMA_CM_STATE_CLOSED; 2866 irdma_send_reset(cm_node); 2867 break; 2868 case IRDMA_CM_STATE_CLOSED: 2869 irdma_cleanup_retrans_entry(cm_node); 2870 refcount_inc(&cm_node->refcnt); 2871 irdma_send_reset(cm_node); 2872 break; 2873 case IRDMA_CM_STATE_LAST_ACK: 2874 case IRDMA_CM_STATE_CLOSING: 2875 irdma_cleanup_retrans_entry(cm_node); 2876 cm_node->state = IRDMA_CM_STATE_CLOSED; 2877 irdma_rem_ref_cm_node(cm_node); 2878 break; 2879 case IRDMA_CM_STATE_FIN_WAIT1: 2880 irdma_cleanup_retrans_entry(cm_node); 2881 cm_node->state = IRDMA_CM_STATE_FIN_WAIT2; 2882 break; 2883 case IRDMA_CM_STATE_SYN_SENT: 2884 case IRDMA_CM_STATE_FIN_WAIT2: 2885 case IRDMA_CM_STATE_OFFLOADED: 2886 case IRDMA_CM_STATE_MPAREQ_RCVD: 2887 case IRDMA_CM_STATE_UNKNOWN: 2888 default: 2889 irdma_cleanup_retrans_entry(cm_node); 2890 break; 2891 } 2892 2893 return 0; 2894 } 2895 2896 /** 2897 * irdma_process_pkt - process cm packet 2898 * @cm_node: connection's node 2899 * @rbuf: receive buffer 2900 */ 2901 static void irdma_process_pkt(struct irdma_cm_node *cm_node, 2902 struct irdma_puda_buf *rbuf) 2903 { 2904 enum irdma_tcpip_pkt_type pkt_type = IRDMA_PKT_TYPE_UNKNOWN; 2905 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2906 u32 fin_set = 0; 2907 int err; 2908 2909 if (tcph->rst) { 2910 pkt_type = IRDMA_PKT_TYPE_RST; 2911 } else if (tcph->syn) { 2912 pkt_type = IRDMA_PKT_TYPE_SYN; 2913 if (tcph->ack) 2914 pkt_type = IRDMA_PKT_TYPE_SYNACK; 2915 } else if (tcph->ack) { 2916 pkt_type = IRDMA_PKT_TYPE_ACK; 2917 } 2918 if (tcph->fin) 2919 fin_set = 1; 2920 2921 switch (pkt_type) { 2922 case IRDMA_PKT_TYPE_SYN: 2923 irdma_handle_syn_pkt(cm_node, rbuf); 2924 break; 2925 case IRDMA_PKT_TYPE_SYNACK: 2926 irdma_handle_synack_pkt(cm_node, rbuf); 2927 break; 2928 case IRDMA_PKT_TYPE_ACK: 2929 err = irdma_handle_ack_pkt(cm_node, rbuf); 2930 if (fin_set && !err) 2931 irdma_handle_fin_pkt(cm_node); 2932 break; 2933 case IRDMA_PKT_TYPE_RST: 2934 irdma_handle_rst_pkt(cm_node, rbuf); 2935 break; 2936 default: 2937 if (fin_set && 2938 (!irdma_check_seq(cm_node, (struct tcphdr *)rbuf->tcph))) 2939 irdma_handle_fin_pkt(cm_node); 2940 break; 2941 } 2942 } 2943 2944 /** 2945 * irdma_make_listen_node - create a listen node with params 2946 * @cm_core: cm's core 2947 * @iwdev: iwarp device structure 2948 * @cm_info: quad info for connection 2949 */ 2950 static struct irdma_cm_listener * 2951 irdma_make_listen_node(struct irdma_cm_core *cm_core, 2952 struct irdma_device *iwdev, 2953 struct irdma_cm_info *cm_info) 2954 { 2955 struct irdma_cm_listener *listener; 2956 unsigned long flags; 2957 2958 /* cannot have multiple matching listeners */ 2959 listener = 2960 irdma_find_listener(cm_core, cm_info->loc_addr, cm_info->ipv4, 2961 cm_info->loc_port, cm_info->vlan_id, 2962 IRDMA_CM_LISTENER_EITHER_STATE); 2963 if (listener && 2964 listener->listener_state == IRDMA_CM_LISTENER_ACTIVE_STATE) { 2965 refcount_dec(&listener->refcnt); 2966 return NULL; 2967 } 2968 2969 if (!listener) { 2970 /* create a CM listen node 2971 * 1/2 node to compare incoming traffic to 2972 */ 2973 listener = kzalloc_obj(*listener); 2974 if (!listener) 2975 return NULL; 2976 cm_core->stats_listen_nodes_created++; 2977 memcpy(listener->loc_addr, cm_info->loc_addr, 2978 sizeof(listener->loc_addr)); 2979 listener->loc_port = cm_info->loc_port; 2980 2981 INIT_LIST_HEAD(&listener->child_listen_list); 2982 2983 refcount_set(&listener->refcnt, 1); 2984 } else { 2985 listener->reused_node = 1; 2986 } 2987 2988 listener->cm_id = cm_info->cm_id; 2989 listener->ipv4 = cm_info->ipv4; 2990 listener->vlan_id = cm_info->vlan_id; 2991 atomic_set(&listener->pend_accepts_cnt, 0); 2992 listener->cm_core = cm_core; 2993 listener->iwdev = iwdev; 2994 2995 listener->backlog = cm_info->backlog; 2996 listener->listener_state = IRDMA_CM_LISTENER_ACTIVE_STATE; 2997 2998 if (!listener->reused_node) { 2999 spin_lock_irqsave(&cm_core->listen_list_lock, flags); 3000 list_add(&listener->list, &cm_core->listen_list); 3001 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); 3002 } 3003 3004 return listener; 3005 } 3006 3007 /** 3008 * irdma_create_cm_node - make a connection node with params 3009 * @cm_core: cm's core 3010 * @iwdev: iwarp device structure 3011 * @conn_param: connection parameters 3012 * @cm_info: quad info for connection 3013 * @caller_cm_node: pointer to cm_node structure to return 3014 */ 3015 static int irdma_create_cm_node(struct irdma_cm_core *cm_core, 3016 struct irdma_device *iwdev, 3017 struct iw_cm_conn_param *conn_param, 3018 struct irdma_cm_info *cm_info, 3019 struct irdma_cm_node **caller_cm_node) 3020 { 3021 struct irdma_cm_node *cm_node; 3022 u16 private_data_len = conn_param->private_data_len; 3023 const void *private_data = conn_param->private_data; 3024 3025 /* create a CM connection node */ 3026 cm_node = irdma_make_cm_node(cm_core, iwdev, cm_info, NULL); 3027 if (IS_ERR(cm_node)) 3028 return PTR_ERR(cm_node); 3029 3030 /* set our node side to client (active) side */ 3031 cm_node->tcp_cntxt.client = 1; 3032 cm_node->tcp_cntxt.rcv_wscale = IRDMA_CM_DEFAULT_RCV_WND_SCALE; 3033 3034 irdma_record_ird_ord(cm_node, conn_param->ird, conn_param->ord); 3035 3036 cm_node->pdata.size = private_data_len; 3037 cm_node->pdata.addr = cm_node->pdata_buf; 3038 3039 memcpy(cm_node->pdata_buf, private_data, private_data_len); 3040 *caller_cm_node = cm_node; 3041 3042 return 0; 3043 } 3044 3045 /** 3046 * irdma_cm_reject - reject and teardown a connection 3047 * @cm_node: connection's node 3048 * @pdata: ptr to private data for reject 3049 * @plen: size of private data 3050 */ 3051 static int irdma_cm_reject(struct irdma_cm_node *cm_node, const void *pdata, 3052 u8 plen) 3053 { 3054 int ret; 3055 int passive_state; 3056 3057 if (cm_node->tcp_cntxt.client) 3058 return 0; 3059 3060 irdma_cleanup_retrans_entry(cm_node); 3061 3062 passive_state = atomic_add_return(1, &cm_node->passive_state); 3063 if (passive_state == IRDMA_SEND_RESET_EVENT) { 3064 cm_node->state = IRDMA_CM_STATE_CLOSED; 3065 irdma_rem_ref_cm_node(cm_node); 3066 return 0; 3067 } 3068 3069 if (cm_node->state == IRDMA_CM_STATE_LISTENER_DESTROYED) { 3070 irdma_rem_ref_cm_node(cm_node); 3071 return 0; 3072 } 3073 3074 ret = irdma_send_mpa_reject(cm_node, pdata, plen); 3075 if (!ret) 3076 return 0; 3077 3078 cm_node->state = IRDMA_CM_STATE_CLOSED; 3079 if (irdma_send_reset(cm_node)) 3080 ibdev_dbg(&cm_node->iwdev->ibdev, 3081 "CM: send reset failed\n"); 3082 3083 return ret; 3084 } 3085 3086 /** 3087 * irdma_cm_close - close of cm connection 3088 * @cm_node: connection's node 3089 */ 3090 static int irdma_cm_close(struct irdma_cm_node *cm_node) 3091 { 3092 switch (cm_node->state) { 3093 case IRDMA_CM_STATE_SYN_RCVD: 3094 case IRDMA_CM_STATE_SYN_SENT: 3095 case IRDMA_CM_STATE_ONE_SIDE_ESTABLISHED: 3096 case IRDMA_CM_STATE_ESTABLISHED: 3097 case IRDMA_CM_STATE_ACCEPTING: 3098 case IRDMA_CM_STATE_MPAREQ_SENT: 3099 case IRDMA_CM_STATE_MPAREQ_RCVD: 3100 irdma_cleanup_retrans_entry(cm_node); 3101 irdma_send_reset(cm_node); 3102 break; 3103 case IRDMA_CM_STATE_CLOSE_WAIT: 3104 cm_node->state = IRDMA_CM_STATE_LAST_ACK; 3105 irdma_send_fin(cm_node); 3106 break; 3107 case IRDMA_CM_STATE_FIN_WAIT1: 3108 case IRDMA_CM_STATE_FIN_WAIT2: 3109 case IRDMA_CM_STATE_LAST_ACK: 3110 case IRDMA_CM_STATE_TIME_WAIT: 3111 case IRDMA_CM_STATE_CLOSING: 3112 return -EINVAL; 3113 case IRDMA_CM_STATE_LISTENING: 3114 irdma_cleanup_retrans_entry(cm_node); 3115 irdma_send_reset(cm_node); 3116 break; 3117 case IRDMA_CM_STATE_MPAREJ_RCVD: 3118 case IRDMA_CM_STATE_UNKNOWN: 3119 case IRDMA_CM_STATE_INITED: 3120 case IRDMA_CM_STATE_CLOSED: 3121 case IRDMA_CM_STATE_LISTENER_DESTROYED: 3122 irdma_rem_ref_cm_node(cm_node); 3123 break; 3124 case IRDMA_CM_STATE_OFFLOADED: 3125 if (cm_node->send_entry) 3126 ibdev_dbg(&cm_node->iwdev->ibdev, 3127 "CM: CM send_entry in OFFLOADED state\n"); 3128 irdma_rem_ref_cm_node(cm_node); 3129 break; 3130 } 3131 3132 return 0; 3133 } 3134 3135 /** 3136 * irdma_receive_ilq - recv an ETHERNET packet, and process it 3137 * through CM 3138 * @vsi: VSI structure of dev 3139 * @rbuf: receive buffer 3140 */ 3141 void irdma_receive_ilq(struct irdma_sc_vsi *vsi, struct irdma_puda_buf *rbuf) 3142 { 3143 struct irdma_cm_node *cm_node; 3144 struct irdma_cm_listener *listener; 3145 struct iphdr *iph; 3146 struct ipv6hdr *ip6h; 3147 struct tcphdr *tcph; 3148 struct irdma_cm_info cm_info = {}; 3149 struct irdma_device *iwdev = vsi->back_vsi; 3150 struct irdma_cm_core *cm_core = &iwdev->cm_core; 3151 struct vlan_ethhdr *ethh; 3152 u16 vtag; 3153 3154 /* if vlan, then maclen = 18 else 14 */ 3155 iph = (struct iphdr *)rbuf->iph; 3156 print_hex_dump_debug("ILQ: RECEIVE ILQ BUFFER", DUMP_PREFIX_OFFSET, 3157 16, 8, rbuf->mem.va, rbuf->totallen, false); 3158 if (iwdev->rf->sc_dev.hw_attrs.uk_attrs.hw_rev >= IRDMA_GEN_2) { 3159 if (rbuf->vlan_valid) { 3160 vtag = rbuf->vlan_id; 3161 cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >> 3162 VLAN_PRIO_SHIFT; 3163 cm_info.vlan_id = vtag & VLAN_VID_MASK; 3164 } else { 3165 cm_info.vlan_id = 0xFFFF; 3166 } 3167 } else { 3168 ethh = rbuf->mem.va; 3169 3170 if (ethh->h_vlan_proto == htons(ETH_P_8021Q)) { 3171 vtag = ntohs(ethh->h_vlan_TCI); 3172 cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >> 3173 VLAN_PRIO_SHIFT; 3174 cm_info.vlan_id = vtag & VLAN_VID_MASK; 3175 ibdev_dbg(&cm_core->iwdev->ibdev, 3176 "CM: vlan_id=%d\n", cm_info.vlan_id); 3177 } else { 3178 cm_info.vlan_id = 0xFFFF; 3179 } 3180 } 3181 tcph = (struct tcphdr *)rbuf->tcph; 3182 3183 if (rbuf->ipv4) { 3184 cm_info.loc_addr[0] = ntohl(iph->daddr); 3185 cm_info.rem_addr[0] = ntohl(iph->saddr); 3186 cm_info.ipv4 = true; 3187 cm_info.tos = iph->tos; 3188 } else { 3189 ip6h = (struct ipv6hdr *)rbuf->iph; 3190 irdma_copy_ip_ntohl(cm_info.loc_addr, 3191 ip6h->daddr.in6_u.u6_addr32); 3192 irdma_copy_ip_ntohl(cm_info.rem_addr, 3193 ip6h->saddr.in6_u.u6_addr32); 3194 cm_info.ipv4 = false; 3195 cm_info.tos = (ip6h->priority << 4) | (ip6h->flow_lbl[0] >> 4); 3196 } 3197 cm_info.loc_port = ntohs(tcph->dest); 3198 cm_info.rem_port = ntohs(tcph->source); 3199 cm_node = irdma_find_node(cm_core, cm_info.rem_port, cm_info.rem_addr, 3200 cm_info.loc_port, cm_info.loc_addr, cm_info.vlan_id); 3201 3202 if (!cm_node) { 3203 /* Only type of packet accepted are for the 3204 * PASSIVE open (syn only) 3205 */ 3206 if (!tcph->syn || tcph->ack) 3207 return; 3208 3209 listener = irdma_find_listener(cm_core, 3210 cm_info.loc_addr, 3211 cm_info.ipv4, 3212 cm_info.loc_port, 3213 cm_info.vlan_id, 3214 IRDMA_CM_LISTENER_ACTIVE_STATE); 3215 if (!listener) { 3216 cm_info.cm_id = NULL; 3217 ibdev_dbg(&cm_core->iwdev->ibdev, 3218 "CM: no listener found\n"); 3219 return; 3220 } 3221 3222 cm_info.cm_id = listener->cm_id; 3223 cm_node = irdma_make_cm_node(cm_core, iwdev, &cm_info, 3224 listener); 3225 if (IS_ERR(cm_node)) { 3226 ibdev_dbg(&cm_core->iwdev->ibdev, 3227 "CM: allocate node failed ret=%ld\n", PTR_ERR(cm_node)); 3228 refcount_dec(&listener->refcnt); 3229 return; 3230 } 3231 3232 if (!tcph->rst && !tcph->fin) { 3233 cm_node->state = IRDMA_CM_STATE_LISTENING; 3234 } else { 3235 irdma_rem_ref_cm_node(cm_node); 3236 return; 3237 } 3238 3239 refcount_inc(&cm_node->refcnt); 3240 } else if (cm_node->state == IRDMA_CM_STATE_OFFLOADED) { 3241 irdma_rem_ref_cm_node(cm_node); 3242 return; 3243 } 3244 3245 irdma_process_pkt(cm_node, rbuf); 3246 irdma_rem_ref_cm_node(cm_node); 3247 } 3248 3249 static int irdma_add_qh(struct irdma_cm_node *cm_node, bool active) 3250 { 3251 if (!active) 3252 irdma_add_conn_est_qh(cm_node); 3253 return 0; 3254 } 3255 3256 static void irdma_cm_free_ah_nop(struct irdma_cm_node *cm_node) 3257 { 3258 } 3259 3260 /** 3261 * irdma_setup_cm_core - setup top level instance of a cm core 3262 * @iwdev: iwarp device structure 3263 * @rdma_ver: HW version 3264 */ 3265 int irdma_setup_cm_core(struct irdma_device *iwdev, u8 rdma_ver) 3266 { 3267 struct irdma_cm_core *cm_core = &iwdev->cm_core; 3268 3269 cm_core->iwdev = iwdev; 3270 cm_core->dev = &iwdev->rf->sc_dev; 3271 3272 /* Handles CM event work items send to Iwarp core */ 3273 cm_core->event_wq = alloc_ordered_workqueue("iwarp-event-wq", 0); 3274 if (!cm_core->event_wq) 3275 return -ENOMEM; 3276 3277 INIT_LIST_HEAD(&cm_core->listen_list); 3278 3279 timer_setup(&cm_core->tcp_timer, irdma_cm_timer_tick, 0); 3280 3281 spin_lock_init(&cm_core->ht_lock); 3282 spin_lock_init(&cm_core->listen_list_lock); 3283 spin_lock_init(&cm_core->apbvt_lock); 3284 switch (rdma_ver) { 3285 case IRDMA_GEN_1: 3286 cm_core->form_cm_frame = irdma_form_uda_cm_frame; 3287 cm_core->cm_create_ah = irdma_add_qh; 3288 cm_core->cm_free_ah = irdma_cm_free_ah_nop; 3289 break; 3290 case IRDMA_GEN_2: 3291 default: 3292 cm_core->form_cm_frame = irdma_form_ah_cm_frame; 3293 cm_core->cm_create_ah = irdma_cm_create_ah; 3294 cm_core->cm_free_ah = irdma_cm_free_ah; 3295 } 3296 3297 return 0; 3298 } 3299 3300 /** 3301 * irdma_cleanup_cm_core - deallocate a top level instance of a 3302 * cm core 3303 * @cm_core: cm's core 3304 */ 3305 void irdma_cleanup_cm_core(struct irdma_cm_core *cm_core) 3306 { 3307 if (!cm_core) 3308 return; 3309 3310 timer_delete_sync(&cm_core->tcp_timer); 3311 3312 destroy_workqueue(cm_core->event_wq); 3313 cm_core->dev->ws_reset(&cm_core->iwdev->vsi); 3314 } 3315 3316 /** 3317 * irdma_init_tcp_ctx - setup qp context 3318 * @cm_node: connection's node 3319 * @tcp_info: offload info for tcp 3320 * @iwqp: associate qp for the connection 3321 */ 3322 static void irdma_init_tcp_ctx(struct irdma_cm_node *cm_node, 3323 struct irdma_tcp_offload_info *tcp_info, 3324 struct irdma_qp *iwqp) 3325 { 3326 tcp_info->ipv4 = cm_node->ipv4; 3327 tcp_info->drop_ooo_seg = !iwqp->iwdev->iw_ooo; 3328 tcp_info->wscale = true; 3329 tcp_info->ignore_tcp_opt = true; 3330 tcp_info->ignore_tcp_uns_opt = true; 3331 tcp_info->no_nagle = false; 3332 3333 tcp_info->ttl = IRDMA_DEFAULT_TTL; 3334 tcp_info->rtt_var = IRDMA_DEFAULT_RTT_VAR; 3335 tcp_info->ss_thresh = IRDMA_DEFAULT_SS_THRESH; 3336 tcp_info->rexmit_thresh = IRDMA_DEFAULT_REXMIT_THRESH; 3337 3338 tcp_info->tcp_state = IRDMA_TCP_STATE_ESTABLISHED; 3339 tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale; 3340 tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale; 3341 3342 tcp_info->snd_nxt = cm_node->tcp_cntxt.loc_seq_num; 3343 tcp_info->snd_wnd = cm_node->tcp_cntxt.snd_wnd; 3344 tcp_info->rcv_nxt = cm_node->tcp_cntxt.rcv_nxt; 3345 tcp_info->snd_max = cm_node->tcp_cntxt.loc_seq_num; 3346 3347 tcp_info->snd_una = cm_node->tcp_cntxt.loc_seq_num; 3348 tcp_info->cwnd = 2 * cm_node->tcp_cntxt.mss; 3349 tcp_info->snd_wl1 = cm_node->tcp_cntxt.rcv_nxt; 3350 tcp_info->snd_wl2 = cm_node->tcp_cntxt.loc_seq_num; 3351 tcp_info->max_snd_window = cm_node->tcp_cntxt.max_snd_wnd; 3352 tcp_info->rcv_wnd = cm_node->tcp_cntxt.rcv_wnd 3353 << cm_node->tcp_cntxt.rcv_wscale; 3354 3355 tcp_info->flow_label = 0; 3356 tcp_info->snd_mss = (u32)cm_node->tcp_cntxt.mss; 3357 tcp_info->tos = cm_node->tos; 3358 if (cm_node->vlan_id < VLAN_N_VID) { 3359 tcp_info->insert_vlan_tag = true; 3360 tcp_info->vlan_tag = cm_node->vlan_id; 3361 tcp_info->vlan_tag |= cm_node->user_pri << VLAN_PRIO_SHIFT; 3362 } 3363 if (cm_node->ipv4) { 3364 tcp_info->src_port = cm_node->loc_port; 3365 tcp_info->dst_port = cm_node->rem_port; 3366 3367 tcp_info->dest_ip_addr[3] = cm_node->rem_addr[0]; 3368 tcp_info->local_ipaddr[3] = cm_node->loc_addr[0]; 3369 tcp_info->arp_idx = (u16)irdma_arp_table(iwqp->iwdev->rf, 3370 &tcp_info->dest_ip_addr[3], 3371 true, NULL, 3372 IRDMA_ARP_RESOLVE); 3373 } else { 3374 tcp_info->src_port = cm_node->loc_port; 3375 tcp_info->dst_port = cm_node->rem_port; 3376 memcpy(tcp_info->dest_ip_addr, cm_node->rem_addr, 3377 sizeof(tcp_info->dest_ip_addr)); 3378 memcpy(tcp_info->local_ipaddr, cm_node->loc_addr, 3379 sizeof(tcp_info->local_ipaddr)); 3380 3381 tcp_info->arp_idx = (u16)irdma_arp_table(iwqp->iwdev->rf, 3382 &tcp_info->dest_ip_addr[0], 3383 false, NULL, 3384 IRDMA_ARP_RESOLVE); 3385 } 3386 } 3387 3388 /** 3389 * irdma_cm_init_tsa_conn - setup qp for RTS 3390 * @iwqp: associate qp for the connection 3391 * @cm_node: connection's node 3392 */ 3393 static void irdma_cm_init_tsa_conn(struct irdma_qp *iwqp, 3394 struct irdma_cm_node *cm_node) 3395 { 3396 struct irdma_iwarp_offload_info *iwarp_info; 3397 struct irdma_qp_host_ctx_info *ctx_info; 3398 3399 iwarp_info = &iwqp->iwarp_info; 3400 ctx_info = &iwqp->ctx_info; 3401 3402 ctx_info->tcp_info = &iwqp->tcp_info; 3403 ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id; 3404 ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id; 3405 3406 iwarp_info->ord_size = cm_node->ord_size; 3407 iwarp_info->ird_size = cm_node->ird_size; 3408 iwarp_info->rd_en = true; 3409 iwarp_info->rdmap_ver = 1; 3410 iwarp_info->ddp_ver = 1; 3411 iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id; 3412 3413 ctx_info->tcp_info_valid = true; 3414 ctx_info->iwarp_info_valid = true; 3415 ctx_info->user_pri = cm_node->user_pri; 3416 3417 irdma_init_tcp_ctx(cm_node, &iwqp->tcp_info, iwqp); 3418 if (cm_node->snd_mark_en) { 3419 iwarp_info->snd_mark_en = true; 3420 iwarp_info->snd_mark_offset = (iwqp->tcp_info.snd_nxt & SNDMARKER_SEQNMASK) + 3421 cm_node->lsmm_size; 3422 } 3423 3424 cm_node->state = IRDMA_CM_STATE_OFFLOADED; 3425 iwqp->tcp_info.tcp_state = IRDMA_TCP_STATE_ESTABLISHED; 3426 iwqp->tcp_info.src_mac_addr_idx = iwqp->iwdev->mac_ip_table_idx; 3427 3428 if (cm_node->rcv_mark_en) { 3429 iwarp_info->rcv_mark_en = true; 3430 iwarp_info->align_hdrs = true; 3431 } 3432 3433 irdma_sc_qp_setctx(&iwqp->sc_qp, iwqp->host_ctx.va, ctx_info); 3434 3435 /* once tcp_info is set, no need to do it again */ 3436 ctx_info->tcp_info_valid = false; 3437 ctx_info->iwarp_info_valid = false; 3438 } 3439 3440 /** 3441 * irdma_cm_disconn - when a connection is being closed 3442 * @iwqp: associated qp for the connection 3443 */ 3444 void irdma_cm_disconn(struct irdma_qp *iwqp) 3445 { 3446 struct irdma_device *iwdev = iwqp->iwdev; 3447 struct disconn_work *work; 3448 unsigned long flags; 3449 3450 work = kzalloc_obj(*work, GFP_ATOMIC); 3451 if (!work) 3452 return; 3453 3454 spin_lock_irqsave(&iwdev->rf->qptable_lock, flags); 3455 if (!iwdev->rf->qp_table[iwqp->ibqp.qp_num]) { 3456 spin_unlock_irqrestore(&iwdev->rf->qptable_lock, flags); 3457 ibdev_dbg(&iwdev->ibdev, 3458 "CM: qp_id %d is already freed\n", 3459 iwqp->ibqp.qp_num); 3460 kfree(work); 3461 return; 3462 } 3463 irdma_qp_add_ref(&iwqp->ibqp); 3464 spin_unlock_irqrestore(&iwdev->rf->qptable_lock, flags); 3465 3466 work->iwqp = iwqp; 3467 INIT_WORK(&work->work, irdma_disconnect_worker); 3468 queue_work(iwdev->cleanup_wq, &work->work); 3469 } 3470 3471 /** 3472 * irdma_qp_disconnect - free qp and close cm 3473 * @iwqp: associate qp for the connection 3474 */ 3475 static void irdma_qp_disconnect(struct irdma_qp *iwqp) 3476 { 3477 struct irdma_device *iwdev = iwqp->iwdev; 3478 3479 iwqp->active_conn = 0; 3480 /* close the CM node down if it is still active */ 3481 ibdev_dbg(&iwdev->ibdev, "CM: Call close API\n"); 3482 irdma_cm_close(iwqp->cm_node); 3483 } 3484 3485 /** 3486 * irdma_cm_disconn_true - called by worker thread to disconnect qp 3487 * @iwqp: associate qp for the connection 3488 */ 3489 static void irdma_cm_disconn_true(struct irdma_qp *iwqp) 3490 { 3491 struct iw_cm_id *cm_id; 3492 struct irdma_device *iwdev; 3493 struct irdma_sc_qp *qp = &iwqp->sc_qp; 3494 u16 last_ae; 3495 u8 original_hw_tcp_state; 3496 u8 original_ibqp_state; 3497 int disconn_status = 0; 3498 int issue_disconn = 0; 3499 int issue_close = 0; 3500 int issue_flush = 0; 3501 unsigned long flags; 3502 int err; 3503 3504 iwdev = iwqp->iwdev; 3505 spin_lock_irqsave(&iwqp->lock, flags); 3506 if (rdma_protocol_roce(&iwdev->ibdev, 1)) { 3507 struct ib_qp_attr attr; 3508 3509 if (iwqp->flush_issued || iwqp->sc_qp.qp_uk.destroy_pending) { 3510 spin_unlock_irqrestore(&iwqp->lock, flags); 3511 return; 3512 } 3513 3514 spin_unlock_irqrestore(&iwqp->lock, flags); 3515 3516 attr.qp_state = IB_QPS_ERR; 3517 irdma_modify_qp_roce(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); 3518 irdma_ib_qp_event(iwqp, qp->event_type); 3519 return; 3520 } 3521 3522 cm_id = iwqp->cm_id; 3523 original_hw_tcp_state = iwqp->hw_tcp_state; 3524 original_ibqp_state = iwqp->ibqp_state; 3525 last_ae = iwqp->last_aeq; 3526 3527 if (qp->term_flags) { 3528 issue_disconn = 1; 3529 issue_close = 1; 3530 iwqp->cm_id = NULL; 3531 irdma_terminate_del_timer(qp); 3532 if (!iwqp->flush_issued) { 3533 iwqp->flush_issued = 1; 3534 issue_flush = 1; 3535 } 3536 } else if ((original_hw_tcp_state == IRDMA_TCP_STATE_CLOSE_WAIT) || 3537 ((original_ibqp_state == IB_QPS_RTS) && 3538 (last_ae == IRDMA_AE_LLP_CONNECTION_RESET))) { 3539 issue_disconn = 1; 3540 if (last_ae == IRDMA_AE_LLP_CONNECTION_RESET) 3541 disconn_status = -ECONNRESET; 3542 } 3543 3544 if (original_hw_tcp_state == IRDMA_TCP_STATE_CLOSED || 3545 original_hw_tcp_state == IRDMA_TCP_STATE_TIME_WAIT || 3546 last_ae == IRDMA_AE_RDMAP_ROE_BAD_LLP_CLOSE || 3547 last_ae == IRDMA_AE_BAD_CLOSE || 3548 last_ae == IRDMA_AE_LLP_CONNECTION_RESET || iwdev->rf->reset || !cm_id) { 3549 issue_close = 1; 3550 iwqp->cm_id = NULL; 3551 qp->term_flags = 0; 3552 if (!iwqp->flush_issued) { 3553 iwqp->flush_issued = 1; 3554 issue_flush = 1; 3555 } 3556 } 3557 3558 spin_unlock_irqrestore(&iwqp->lock, flags); 3559 if (issue_flush && !iwqp->sc_qp.qp_uk.destroy_pending) { 3560 irdma_flush_wqes(iwqp, IRDMA_FLUSH_SQ | IRDMA_FLUSH_RQ | 3561 IRDMA_FLUSH_WAIT); 3562 3563 if (qp->term_flags) 3564 irdma_ib_qp_event(iwqp, qp->event_type); 3565 } 3566 3567 if (!cm_id || !cm_id->event_handler) 3568 return; 3569 3570 spin_lock_irqsave(&iwdev->cm_core.ht_lock, flags); 3571 if (!iwqp->cm_node) { 3572 spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags); 3573 return; 3574 } 3575 refcount_inc(&iwqp->cm_node->refcnt); 3576 3577 spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags); 3578 3579 if (issue_disconn) { 3580 err = irdma_send_cm_event(iwqp->cm_node, cm_id, 3581 IW_CM_EVENT_DISCONNECT, 3582 disconn_status); 3583 if (err) 3584 ibdev_dbg(&iwdev->ibdev, 3585 "CM: disconnect event failed: - cm_id = %p\n", 3586 cm_id); 3587 } 3588 if (issue_close) { 3589 cm_id->provider_data = iwqp; 3590 err = irdma_send_cm_event(iwqp->cm_node, cm_id, 3591 IW_CM_EVENT_CLOSE, 0); 3592 if (err) 3593 ibdev_dbg(&iwdev->ibdev, 3594 "CM: close event failed: - cm_id = %p\n", 3595 cm_id); 3596 irdma_qp_disconnect(iwqp); 3597 } 3598 irdma_rem_ref_cm_node(iwqp->cm_node); 3599 } 3600 3601 /** 3602 * irdma_disconnect_worker - worker for connection close 3603 * @work: points or disconn structure 3604 */ 3605 static void irdma_disconnect_worker(struct work_struct *work) 3606 { 3607 struct disconn_work *dwork = container_of(work, struct disconn_work, work); 3608 struct irdma_qp *iwqp = dwork->iwqp; 3609 3610 kfree(dwork); 3611 irdma_cm_disconn_true(iwqp); 3612 irdma_qp_rem_ref(&iwqp->ibqp); 3613 } 3614 3615 /** 3616 * irdma_free_lsmm_rsrc - free lsmm memory and deregister 3617 * @iwqp: associate qp for the connection 3618 */ 3619 void irdma_free_lsmm_rsrc(struct irdma_qp *iwqp) 3620 { 3621 struct irdma_device *iwdev; 3622 3623 iwdev = iwqp->iwdev; 3624 3625 if (iwqp->ietf_mem.va) { 3626 if (iwqp->lsmm_mr) 3627 iwdev->ibdev.ops.dereg_mr(iwqp->lsmm_mr, NULL); 3628 dma_free_coherent(iwdev->rf->sc_dev.hw->device, 3629 iwqp->ietf_mem.size, iwqp->ietf_mem.va, 3630 iwqp->ietf_mem.pa); 3631 iwqp->ietf_mem.va = NULL; 3632 } 3633 } 3634 3635 /** 3636 * irdma_accept - registered call for connection to be accepted 3637 * @cm_id: cm information for passive connection 3638 * @conn_param: accept parameters 3639 */ 3640 int irdma_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) 3641 { 3642 struct ib_qp *ibqp; 3643 struct irdma_qp *iwqp; 3644 struct irdma_device *iwdev; 3645 struct irdma_sc_dev *dev; 3646 struct irdma_cm_node *cm_node; 3647 struct ib_qp_attr attr = {}; 3648 int passive_state; 3649 struct ib_mr *ibmr; 3650 struct irdma_pd *iwpd; 3651 u16 buf_len = 0; 3652 struct irdma_kmem_info accept; 3653 u64 tagged_offset; 3654 int wait_ret; 3655 int ret = 0; 3656 3657 ibqp = irdma_get_qp(cm_id->device, conn_param->qpn); 3658 if (!ibqp) 3659 return -EINVAL; 3660 3661 iwqp = to_iwqp(ibqp); 3662 iwdev = iwqp->iwdev; 3663 dev = &iwdev->rf->sc_dev; 3664 cm_node = cm_id->provider_data; 3665 3666 if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) { 3667 cm_node->ipv4 = true; 3668 cm_node->vlan_id = irdma_get_vlan_ipv4(cm_node->loc_addr); 3669 } else { 3670 cm_node->ipv4 = false; 3671 irdma_get_vlan_mac_ipv6(cm_node->loc_addr, &cm_node->vlan_id, 3672 NULL); 3673 } 3674 ibdev_dbg(&iwdev->ibdev, "CM: Accept vlan_id=%d\n", 3675 cm_node->vlan_id); 3676 3677 trace_irdma_accept(cm_node, 0, NULL); 3678 3679 if (cm_node->state == IRDMA_CM_STATE_LISTENER_DESTROYED) { 3680 ret = -EINVAL; 3681 goto error; 3682 } 3683 3684 passive_state = atomic_add_return(1, &cm_node->passive_state); 3685 if (passive_state == IRDMA_SEND_RESET_EVENT) { 3686 ret = -ECONNRESET; 3687 goto error; 3688 } 3689 3690 buf_len = conn_param->private_data_len + IRDMA_MAX_IETF_SIZE; 3691 iwqp->ietf_mem.size = ALIGN(buf_len, 1); 3692 iwqp->ietf_mem.va = dma_alloc_coherent(dev->hw->device, 3693 iwqp->ietf_mem.size, 3694 &iwqp->ietf_mem.pa, GFP_KERNEL); 3695 if (!iwqp->ietf_mem.va) { 3696 ret = -ENOMEM; 3697 goto error; 3698 } 3699 3700 cm_node->pdata.size = conn_param->private_data_len; 3701 accept.addr = iwqp->ietf_mem.va; 3702 accept.size = irdma_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY); 3703 memcpy((u8 *)accept.addr + accept.size, conn_param->private_data, 3704 conn_param->private_data_len); 3705 3706 if (cm_node->dev->ws_add(iwqp->sc_qp.vsi, cm_node->user_pri)) { 3707 ret = -ENOMEM; 3708 goto error; 3709 } 3710 iwqp->sc_qp.user_pri = cm_node->user_pri; 3711 irdma_qp_add_qos(&iwqp->sc_qp); 3712 /* setup our first outgoing iWarp send WQE (the IETF frame response) */ 3713 iwpd = iwqp->iwpd; 3714 tagged_offset = (uintptr_t)iwqp->ietf_mem.va; 3715 ibmr = irdma_reg_phys_mr(&iwpd->ibpd, iwqp->ietf_mem.pa, buf_len, 3716 IB_ACCESS_LOCAL_WRITE, &tagged_offset, false); 3717 if (IS_ERR(ibmr)) { 3718 ret = -ENOMEM; 3719 goto error; 3720 } 3721 3722 ibmr->pd = &iwpd->ibpd; 3723 ibmr->device = iwpd->ibpd.device; 3724 iwqp->lsmm_mr = ibmr; 3725 if (iwqp->page) 3726 iwqp->sc_qp.qp_uk.sq_base = kmap_local_page(iwqp->page); 3727 3728 cm_node->lsmm_size = accept.size + conn_param->private_data_len; 3729 irdma_sc_send_lsmm(&iwqp->sc_qp, iwqp->ietf_mem.va, cm_node->lsmm_size, 3730 ibmr->lkey); 3731 3732 if (iwqp->page) 3733 kunmap_local(iwqp->sc_qp.qp_uk.sq_base); 3734 3735 iwqp->cm_id = cm_id; 3736 cm_node->cm_id = cm_id; 3737 3738 cm_id->provider_data = iwqp; 3739 iwqp->active_conn = 0; 3740 iwqp->cm_node = cm_node; 3741 cm_node->iwqp = iwqp; 3742 irdma_cm_init_tsa_conn(iwqp, cm_node); 3743 irdma_qp_add_ref(&iwqp->ibqp); 3744 cm_id->add_ref(cm_id); 3745 3746 attr.qp_state = IB_QPS_RTS; 3747 cm_node->qhash_set = false; 3748 cm_node->cm_core->cm_free_ah(cm_node); 3749 3750 irdma_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); 3751 if (dev->hw_attrs.uk_attrs.feature_flags & IRDMA_FEATURE_RTS_AE) { 3752 wait_ret = wait_event_interruptible_timeout(iwqp->waitq, 3753 iwqp->rts_ae_rcvd, 3754 IRDMA_MAX_TIMEOUT); 3755 if (!wait_ret) { 3756 ibdev_dbg(&iwdev->ibdev, 3757 "CM: Slow Connection: cm_node=%p, loc_port=%d, rem_port=%d, cm_id=%p\n", 3758 cm_node, cm_node->loc_port, 3759 cm_node->rem_port, cm_node->cm_id); 3760 ret = -ECONNRESET; 3761 goto error; 3762 } 3763 } 3764 3765 irdma_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0); 3766 cm_node->accelerated = true; 3767 complete(&cm_node->establish_comp); 3768 3769 if (cm_node->accept_pend) { 3770 atomic_dec(&cm_node->listener->pend_accepts_cnt); 3771 cm_node->accept_pend = 0; 3772 } 3773 3774 ibdev_dbg(&iwdev->ibdev, 3775 "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", 3776 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr, 3777 cm_node->loc_addr, cm_node, cm_id, ibqp->qp_num); 3778 cm_node->cm_core->stats_accepts++; 3779 3780 return 0; 3781 error: 3782 irdma_free_lsmm_rsrc(iwqp); 3783 irdma_rem_ref_cm_node(cm_node); 3784 3785 return ret; 3786 } 3787 3788 /** 3789 * irdma_reject - registered call for connection to be rejected 3790 * @cm_id: cm information for passive connection 3791 * @pdata: private data to be sent 3792 * @pdata_len: private data length 3793 */ 3794 int irdma_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len) 3795 { 3796 struct irdma_device *iwdev; 3797 struct irdma_cm_node *cm_node; 3798 3799 cm_node = cm_id->provider_data; 3800 cm_node->pdata.size = pdata_len; 3801 3802 trace_irdma_reject(cm_node, 0, NULL); 3803 3804 iwdev = to_iwdev(cm_id->device); 3805 if (!iwdev) 3806 return -EINVAL; 3807 3808 cm_node->cm_core->stats_rejects++; 3809 3810 if (pdata_len + sizeof(struct ietf_mpa_v2) > IRDMA_MAX_CM_BUF) 3811 return -EINVAL; 3812 3813 return irdma_cm_reject(cm_node, pdata, pdata_len); 3814 } 3815 3816 /** 3817 * irdma_connect - registered call for connection to be established 3818 * @cm_id: cm information for passive connection 3819 * @conn_param: Information about the connection 3820 */ 3821 int irdma_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) 3822 { 3823 struct ib_qp *ibqp; 3824 struct irdma_qp *iwqp; 3825 struct irdma_device *iwdev; 3826 struct irdma_cm_node *cm_node; 3827 struct irdma_cm_info cm_info; 3828 struct sockaddr_in *laddr; 3829 struct sockaddr_in *raddr; 3830 struct sockaddr_in6 *laddr6; 3831 struct sockaddr_in6 *raddr6; 3832 int ret = 0; 3833 3834 ibqp = irdma_get_qp(cm_id->device, conn_param->qpn); 3835 if (!ibqp) 3836 return -EINVAL; 3837 iwqp = to_iwqp(ibqp); 3838 if (!iwqp) 3839 return -EINVAL; 3840 iwdev = iwqp->iwdev; 3841 if (!iwdev) 3842 return -EINVAL; 3843 3844 laddr = (struct sockaddr_in *)&cm_id->m_local_addr; 3845 raddr = (struct sockaddr_in *)&cm_id->m_remote_addr; 3846 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr; 3847 raddr6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr; 3848 3849 if (!(laddr->sin_port) || !(raddr->sin_port)) 3850 return -EINVAL; 3851 3852 iwqp->active_conn = 1; 3853 iwqp->cm_id = NULL; 3854 cm_id->provider_data = iwqp; 3855 3856 /* set up the connection params for the node */ 3857 if (cm_id->remote_addr.ss_family == AF_INET) { 3858 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV4) 3859 return -EINVAL; 3860 3861 cm_info.ipv4 = true; 3862 memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr)); 3863 memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr)); 3864 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr); 3865 cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr); 3866 cm_info.loc_port = ntohs(laddr->sin_port); 3867 cm_info.rem_port = ntohs(raddr->sin_port); 3868 cm_info.vlan_id = irdma_get_vlan_ipv4(cm_info.loc_addr); 3869 } else { 3870 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV6) 3871 return -EINVAL; 3872 3873 cm_info.ipv4 = false; 3874 irdma_copy_ip_ntohl(cm_info.loc_addr, 3875 laddr6->sin6_addr.in6_u.u6_addr32); 3876 irdma_copy_ip_ntohl(cm_info.rem_addr, 3877 raddr6->sin6_addr.in6_u.u6_addr32); 3878 cm_info.loc_port = ntohs(laddr6->sin6_port); 3879 cm_info.rem_port = ntohs(raddr6->sin6_port); 3880 irdma_get_vlan_mac_ipv6(cm_info.loc_addr, &cm_info.vlan_id, 3881 NULL); 3882 } 3883 cm_info.cm_id = cm_id; 3884 cm_info.qh_qpid = iwdev->vsi.ilq->qp_id; 3885 cm_info.tos = cm_id->tos; 3886 if (iwdev->vsi.dscp_mode) { 3887 cm_info.user_pri = 3888 iwqp->sc_qp.vsi->dscp_map[irdma_tos2dscp(cm_info.tos)]; 3889 } else { 3890 cm_info.user_pri = rt_tos2priority(cm_id->tos); 3891 cm_info.user_pri = irdma_iw_get_vlan_prio(cm_info.loc_addr, 3892 cm_info.user_pri, 3893 cm_info.ipv4); 3894 } 3895 3896 if (iwqp->sc_qp.dev->ws_add(iwqp->sc_qp.vsi, cm_info.user_pri)) 3897 return -ENOMEM; 3898 iwqp->sc_qp.user_pri = cm_info.user_pri; 3899 irdma_qp_add_qos(&iwqp->sc_qp); 3900 ibdev_dbg(&iwdev->ibdev, "DCB: TOS:[%d] UP:[%d]\n", cm_id->tos, 3901 cm_info.user_pri); 3902 3903 trace_irdma_dcb_tos(iwdev, cm_id->tos, cm_info.user_pri); 3904 3905 ret = irdma_create_cm_node(&iwdev->cm_core, iwdev, conn_param, &cm_info, 3906 &cm_node); 3907 if (ret) 3908 return ret; 3909 ret = cm_node->cm_core->cm_create_ah(cm_node, true); 3910 if (ret) 3911 goto err; 3912 if (irdma_manage_qhash(iwdev, &cm_info, 3913 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 3914 IRDMA_QHASH_MANAGE_TYPE_ADD, NULL, true)) { 3915 ret = -EINVAL; 3916 goto err; 3917 } 3918 cm_node->qhash_set = true; 3919 3920 cm_node->apbvt_entry = irdma_add_apbvt(iwdev, cm_info.loc_port); 3921 if (!cm_node->apbvt_entry) { 3922 ret = -EINVAL; 3923 goto err; 3924 } 3925 3926 cm_node->apbvt_set = true; 3927 iwqp->cm_node = cm_node; 3928 cm_node->iwqp = iwqp; 3929 iwqp->cm_id = cm_id; 3930 irdma_qp_add_ref(&iwqp->ibqp); 3931 cm_id->add_ref(cm_id); 3932 3933 if (cm_node->state != IRDMA_CM_STATE_OFFLOADED) { 3934 cm_node->state = IRDMA_CM_STATE_SYN_SENT; 3935 ret = irdma_send_syn(cm_node, 0); 3936 if (ret) 3937 goto err; 3938 } 3939 3940 ibdev_dbg(&iwdev->ibdev, 3941 "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", 3942 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr, 3943 cm_node->loc_addr, cm_node, cm_id, ibqp->qp_num); 3944 3945 trace_irdma_connect(cm_node, 0, NULL); 3946 3947 return 0; 3948 3949 err: 3950 if (cm_info.ipv4) 3951 ibdev_dbg(&iwdev->ibdev, 3952 "CM: connect() FAILED: dest addr=%pI4", 3953 cm_info.rem_addr); 3954 else 3955 ibdev_dbg(&iwdev->ibdev, 3956 "CM: connect() FAILED: dest addr=%pI6", 3957 cm_info.rem_addr); 3958 irdma_rem_ref_cm_node(cm_node); 3959 iwdev->cm_core.stats_connect_errs++; 3960 3961 return ret; 3962 } 3963 3964 /** 3965 * irdma_create_listen - registered call creating listener 3966 * @cm_id: cm information for passive connection 3967 * @backlog: to max accept pending count 3968 */ 3969 int irdma_create_listen(struct iw_cm_id *cm_id, int backlog) 3970 { 3971 struct irdma_device *iwdev; 3972 struct irdma_cm_listener *cm_listen_node; 3973 struct irdma_cm_info cm_info = {}; 3974 struct sockaddr_in *laddr; 3975 struct sockaddr_in6 *laddr6; 3976 bool wildcard = false; 3977 int err; 3978 3979 iwdev = to_iwdev(cm_id->device); 3980 if (!iwdev) 3981 return -EINVAL; 3982 3983 laddr = (struct sockaddr_in *)&cm_id->m_local_addr; 3984 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr; 3985 cm_info.qh_qpid = iwdev->vsi.ilq->qp_id; 3986 3987 if (laddr->sin_family == AF_INET) { 3988 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV4) 3989 return -EINVAL; 3990 3991 cm_info.ipv4 = true; 3992 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr); 3993 cm_info.loc_port = ntohs(laddr->sin_port); 3994 3995 if (laddr->sin_addr.s_addr != htonl(INADDR_ANY)) { 3996 cm_info.vlan_id = irdma_get_vlan_ipv4(cm_info.loc_addr); 3997 } else { 3998 cm_info.vlan_id = 0xFFFF; 3999 wildcard = true; 4000 } 4001 } else { 4002 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV6) 4003 return -EINVAL; 4004 4005 cm_info.ipv4 = false; 4006 irdma_copy_ip_ntohl(cm_info.loc_addr, 4007 laddr6->sin6_addr.in6_u.u6_addr32); 4008 cm_info.loc_port = ntohs(laddr6->sin6_port); 4009 if (ipv6_addr_type(&laddr6->sin6_addr) != IPV6_ADDR_ANY) { 4010 irdma_get_vlan_mac_ipv6(cm_info.loc_addr, 4011 &cm_info.vlan_id, NULL); 4012 } else { 4013 cm_info.vlan_id = 0xFFFF; 4014 wildcard = true; 4015 } 4016 } 4017 4018 if (cm_info.vlan_id >= VLAN_N_VID && iwdev->dcb_vlan_mode) 4019 cm_info.vlan_id = 0; 4020 cm_info.backlog = backlog; 4021 cm_info.cm_id = cm_id; 4022 4023 trace_irdma_create_listen(iwdev, &cm_info); 4024 4025 cm_listen_node = irdma_make_listen_node(&iwdev->cm_core, iwdev, 4026 &cm_info); 4027 if (!cm_listen_node) { 4028 ibdev_dbg(&iwdev->ibdev, 4029 "CM: cm_listen_node == NULL\n"); 4030 return -ENOMEM; 4031 } 4032 4033 cm_id->provider_data = cm_listen_node; 4034 4035 cm_listen_node->tos = cm_id->tos; 4036 if (iwdev->vsi.dscp_mode) 4037 cm_listen_node->user_pri = 4038 iwdev->vsi.dscp_map[irdma_tos2dscp(cm_id->tos)]; 4039 else 4040 cm_listen_node->user_pri = rt_tos2priority(cm_id->tos); 4041 cm_info.user_pri = cm_listen_node->user_pri; 4042 if (!cm_listen_node->reused_node) { 4043 if (wildcard) { 4044 err = irdma_add_mqh(iwdev, &cm_info, cm_listen_node); 4045 if (err) 4046 goto error; 4047 } else { 4048 if (!iwdev->vsi.dscp_mode) 4049 cm_listen_node->user_pri = 4050 irdma_iw_get_vlan_prio(cm_info.loc_addr, 4051 cm_info.user_pri, 4052 cm_info.ipv4); 4053 cm_info.user_pri = cm_listen_node->user_pri; 4054 err = irdma_manage_qhash(iwdev, &cm_info, 4055 IRDMA_QHASH_TYPE_TCP_SYN, 4056 IRDMA_QHASH_MANAGE_TYPE_ADD, 4057 NULL, true); 4058 if (err) 4059 goto error; 4060 4061 cm_listen_node->qhash_set = true; 4062 } 4063 4064 cm_listen_node->apbvt_entry = irdma_add_apbvt(iwdev, 4065 cm_info.loc_port); 4066 if (!cm_listen_node->apbvt_entry) 4067 goto error; 4068 } 4069 cm_id->add_ref(cm_id); 4070 cm_listen_node->cm_core->stats_listen_created++; 4071 ibdev_dbg(&iwdev->ibdev, 4072 "CM: loc_port=0x%04x loc_addr=%pI4 cm_listen_node=%p cm_id=%p qhash_set=%d vlan_id=%d\n", 4073 cm_listen_node->loc_port, cm_listen_node->loc_addr, 4074 cm_listen_node, cm_listen_node->cm_id, 4075 cm_listen_node->qhash_set, cm_listen_node->vlan_id); 4076 4077 return 0; 4078 4079 error: 4080 4081 irdma_cm_del_listen(&iwdev->cm_core, cm_listen_node, false); 4082 4083 return -EINVAL; 4084 } 4085 4086 /** 4087 * irdma_destroy_listen - registered call to destroy listener 4088 * @cm_id: cm information for passive connection 4089 */ 4090 int irdma_destroy_listen(struct iw_cm_id *cm_id) 4091 { 4092 struct irdma_device *iwdev; 4093 4094 iwdev = to_iwdev(cm_id->device); 4095 if (cm_id->provider_data) 4096 irdma_cm_del_listen(&iwdev->cm_core, cm_id->provider_data, 4097 true); 4098 else 4099 ibdev_dbg(&iwdev->ibdev, 4100 "CM: cm_id->provider_data was NULL\n"); 4101 4102 cm_id->rem_ref(cm_id); 4103 4104 return 0; 4105 } 4106 4107 /** 4108 * irdma_teardown_list_prep - add conn nodes slated for tear down to list 4109 * @cm_core: cm's core 4110 * @teardown_list: a list to which cm_node will be selected 4111 * @ipaddr: pointer to ip address 4112 * @nfo: pointer to cm_info structure instance 4113 * @disconnect_all: flag indicating disconnect all QPs 4114 */ 4115 static void irdma_teardown_list_prep(struct irdma_cm_core *cm_core, 4116 struct list_head *teardown_list, 4117 u32 *ipaddr, 4118 struct irdma_cm_info *nfo, 4119 bool disconnect_all) 4120 { 4121 struct irdma_cm_node *cm_node; 4122 int bkt; 4123 4124 hash_for_each_rcu(cm_core->cm_hash_tbl, bkt, cm_node, list) { 4125 if ((disconnect_all || 4126 (nfo->vlan_id == cm_node->vlan_id && 4127 !memcmp(cm_node->loc_addr, ipaddr, nfo->ipv4 ? 4 : 16))) && 4128 refcount_inc_not_zero(&cm_node->refcnt)) 4129 list_add(&cm_node->teardown_entry, teardown_list); 4130 } 4131 } 4132 4133 /** 4134 * irdma_cm_event_connected - handle connected active node 4135 * @event: the info for cm_node of connection 4136 */ 4137 static void irdma_cm_event_connected(struct irdma_cm_event *event) 4138 { 4139 struct irdma_qp *iwqp; 4140 struct irdma_device *iwdev; 4141 struct irdma_cm_node *cm_node; 4142 struct irdma_sc_dev *dev; 4143 struct ib_qp_attr attr = {}; 4144 struct iw_cm_id *cm_id; 4145 int status; 4146 bool read0; 4147 int wait_ret = 0; 4148 4149 cm_node = event->cm_node; 4150 cm_id = cm_node->cm_id; 4151 iwqp = cm_id->provider_data; 4152 iwdev = iwqp->iwdev; 4153 dev = &iwdev->rf->sc_dev; 4154 if (iwqp->sc_qp.qp_uk.destroy_pending) { 4155 status = -ETIMEDOUT; 4156 goto error; 4157 } 4158 4159 irdma_cm_init_tsa_conn(iwqp, cm_node); 4160 read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO); 4161 if (iwqp->page) 4162 iwqp->sc_qp.qp_uk.sq_base = kmap_local_page(iwqp->page); 4163 irdma_sc_send_rtt(&iwqp->sc_qp, read0); 4164 if (iwqp->page) 4165 kunmap_local(iwqp->sc_qp.qp_uk.sq_base); 4166 4167 attr.qp_state = IB_QPS_RTS; 4168 cm_node->qhash_set = false; 4169 irdma_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); 4170 if (dev->hw_attrs.uk_attrs.feature_flags & IRDMA_FEATURE_RTS_AE) { 4171 wait_ret = wait_event_interruptible_timeout(iwqp->waitq, 4172 iwqp->rts_ae_rcvd, 4173 IRDMA_MAX_TIMEOUT); 4174 if (!wait_ret) 4175 ibdev_dbg(&iwdev->ibdev, 4176 "CM: Slow Connection: cm_node=%p, loc_port=%d, rem_port=%d, cm_id=%p\n", 4177 cm_node, cm_node->loc_port, 4178 cm_node->rem_port, cm_node->cm_id); 4179 } 4180 4181 irdma_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 0); 4182 cm_node->accelerated = true; 4183 complete(&cm_node->establish_comp); 4184 cm_node->cm_core->cm_free_ah(cm_node); 4185 return; 4186 4187 error: 4188 iwqp->cm_id = NULL; 4189 cm_id->provider_data = NULL; 4190 irdma_send_cm_event(event->cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 4191 status); 4192 irdma_rem_ref_cm_node(event->cm_node); 4193 } 4194 4195 /** 4196 * irdma_cm_event_reset - handle reset 4197 * @event: the info for cm_node of connection 4198 */ 4199 static void irdma_cm_event_reset(struct irdma_cm_event *event) 4200 { 4201 struct irdma_cm_node *cm_node = event->cm_node; 4202 struct iw_cm_id *cm_id = cm_node->cm_id; 4203 struct irdma_qp *iwqp; 4204 4205 if (!cm_id) 4206 return; 4207 4208 iwqp = cm_id->provider_data; 4209 if (!iwqp) 4210 return; 4211 4212 ibdev_dbg(&cm_node->iwdev->ibdev, 4213 "CM: reset event %p - cm_id = %p\n", event->cm_node, cm_id); 4214 iwqp->cm_id = NULL; 4215 4216 irdma_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT, 4217 -ECONNRESET); 4218 irdma_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0); 4219 } 4220 4221 /** 4222 * irdma_cm_event_handler - send event to cm upper layer 4223 * @work: pointer of cm event info. 4224 */ 4225 static void irdma_cm_event_handler(struct work_struct *work) 4226 { 4227 struct irdma_cm_event *event = container_of(work, struct irdma_cm_event, event_work); 4228 struct irdma_cm_node *cm_node; 4229 4230 if (!event || !event->cm_node || !event->cm_node->cm_core) 4231 return; 4232 4233 cm_node = event->cm_node; 4234 trace_irdma_cm_event_handler(cm_node, event->type, NULL); 4235 4236 switch (event->type) { 4237 case IRDMA_CM_EVENT_MPA_REQ: 4238 irdma_send_cm_event(cm_node, cm_node->cm_id, 4239 IW_CM_EVENT_CONNECT_REQUEST, 0); 4240 break; 4241 case IRDMA_CM_EVENT_RESET: 4242 irdma_cm_event_reset(event); 4243 break; 4244 case IRDMA_CM_EVENT_CONNECTED: 4245 if (!cm_node->cm_id || 4246 cm_node->state != IRDMA_CM_STATE_OFFLOADED) 4247 break; 4248 irdma_cm_event_connected(event); 4249 break; 4250 case IRDMA_CM_EVENT_MPA_REJECT: 4251 if (!cm_node->cm_id || 4252 cm_node->state == IRDMA_CM_STATE_OFFLOADED) 4253 break; 4254 irdma_send_cm_event(cm_node, cm_node->cm_id, 4255 IW_CM_EVENT_CONNECT_REPLY, -ECONNREFUSED); 4256 break; 4257 case IRDMA_CM_EVENT_ABORTED: 4258 if (!cm_node->cm_id || 4259 cm_node->state == IRDMA_CM_STATE_OFFLOADED) 4260 break; 4261 irdma_event_connect_error(event); 4262 break; 4263 default: 4264 ibdev_dbg(&cm_node->iwdev->ibdev, 4265 "CM: bad event type = %d\n", event->type); 4266 break; 4267 } 4268 4269 irdma_rem_ref_cm_node(cm_node); 4270 kfree(event); 4271 } 4272 4273 /** 4274 * irdma_cm_post_event - queue event request for worker thread 4275 * @event: cm node's info for up event call 4276 */ 4277 static void irdma_cm_post_event(struct irdma_cm_event *event) 4278 { 4279 refcount_inc(&event->cm_node->refcnt); 4280 INIT_WORK(&event->event_work, irdma_cm_event_handler); 4281 queue_work(event->cm_node->cm_core->event_wq, &event->event_work); 4282 } 4283 4284 /** 4285 * irdma_cm_teardown_connections - teardown QPs 4286 * @iwdev: device pointer 4287 * @ipaddr: Pointer to IPv4 or IPv6 address 4288 * @nfo: Connection info 4289 * @disconnect_all: flag indicating disconnect all QPs 4290 * 4291 * teardown QPs where source or destination addr matches ip addr 4292 */ 4293 void irdma_cm_teardown_connections(struct irdma_device *iwdev, u32 *ipaddr, 4294 struct irdma_cm_info *nfo, 4295 bool disconnect_all) 4296 { 4297 struct irdma_cm_core *cm_core = &iwdev->cm_core; 4298 struct list_head *list_core_temp; 4299 struct list_head *list_node; 4300 struct irdma_cm_node *cm_node; 4301 struct list_head teardown_list; 4302 struct ib_qp_attr attr; 4303 4304 INIT_LIST_HEAD(&teardown_list); 4305 4306 rcu_read_lock(); 4307 irdma_teardown_list_prep(cm_core, &teardown_list, ipaddr, nfo, disconnect_all); 4308 rcu_read_unlock(); 4309 4310 list_for_each_safe (list_node, list_core_temp, &teardown_list) { 4311 cm_node = container_of(list_node, struct irdma_cm_node, 4312 teardown_entry); 4313 attr.qp_state = IB_QPS_ERR; 4314 irdma_modify_qp(&cm_node->iwqp->ibqp, &attr, IB_QP_STATE, NULL); 4315 if (iwdev->rf->reset) 4316 irdma_cm_disconn(cm_node->iwqp); 4317 irdma_rem_ref_cm_node(cm_node); 4318 } 4319 } 4320 4321 /** 4322 * irdma_qhash_ctrl - enable/disable qhash for list 4323 * @iwdev: device pointer 4324 * @parent_listen_node: parent listen node 4325 * @nfo: cm info node 4326 * @ipaddr: Pointer to IPv4 or IPv6 address 4327 * @ipv4: flag indicating IPv4 when true 4328 * @ifup: flag indicating interface up when true 4329 * 4330 * Enables or disables the qhash for the node in the child 4331 * listen list that matches ipaddr. If no matching IP was found 4332 * it will allocate and add a new child listen node to the 4333 * parent listen node. The listen_list_lock is assumed to be 4334 * held when called. 4335 */ 4336 static void irdma_qhash_ctrl(struct irdma_device *iwdev, 4337 struct irdma_cm_listener *parent_listen_node, 4338 struct irdma_cm_info *nfo, u32 *ipaddr, bool ipv4, 4339 bool ifup) 4340 { 4341 struct list_head *child_listen_list = &parent_listen_node->child_listen_list; 4342 struct irdma_cm_listener *child_listen_node; 4343 struct list_head *pos, *tpos; 4344 bool node_allocated = false; 4345 enum irdma_quad_hash_manage_type op = ifup ? 4346 IRDMA_QHASH_MANAGE_TYPE_ADD : 4347 IRDMA_QHASH_MANAGE_TYPE_DELETE; 4348 int err; 4349 4350 list_for_each_safe (pos, tpos, child_listen_list) { 4351 child_listen_node = list_entry(pos, struct irdma_cm_listener, 4352 child_listen_list); 4353 if (!memcmp(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16)) 4354 goto set_qhash; 4355 } 4356 4357 /* if not found then add a child listener if interface is going up */ 4358 if (!ifup) 4359 return; 4360 child_listen_node = kmemdup(parent_listen_node, 4361 sizeof(*child_listen_node), GFP_ATOMIC); 4362 if (!child_listen_node) 4363 return; 4364 4365 node_allocated = true; 4366 memcpy(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16); 4367 4368 set_qhash: 4369 memcpy(nfo->loc_addr, child_listen_node->loc_addr, 4370 sizeof(nfo->loc_addr)); 4371 nfo->vlan_id = child_listen_node->vlan_id; 4372 err = irdma_manage_qhash(iwdev, nfo, IRDMA_QHASH_TYPE_TCP_SYN, op, NULL, 4373 false); 4374 if (!err) { 4375 child_listen_node->qhash_set = ifup; 4376 if (node_allocated) 4377 list_add(&child_listen_node->child_listen_list, 4378 &parent_listen_node->child_listen_list); 4379 } else if (node_allocated) { 4380 kfree(child_listen_node); 4381 } 4382 } 4383 4384 /** 4385 * irdma_if_notify - process an ifdown on an interface 4386 * @iwdev: device pointer 4387 * @netdev: network device structure 4388 * @ipaddr: Pointer to IPv4 or IPv6 address 4389 * @ipv4: flag indicating IPv4 when true 4390 * @ifup: flag indicating interface up when true 4391 */ 4392 void irdma_if_notify(struct irdma_device *iwdev, struct net_device *netdev, 4393 u32 *ipaddr, bool ipv4, bool ifup) 4394 { 4395 struct irdma_cm_core *cm_core = &iwdev->cm_core; 4396 unsigned long flags; 4397 struct irdma_cm_listener *listen_node; 4398 static const u32 ip_zero[4] = { 0, 0, 0, 0 }; 4399 struct irdma_cm_info nfo = {}; 4400 u16 vlan_id = rdma_vlan_dev_vlan_id(netdev); 4401 enum irdma_quad_hash_manage_type op = ifup ? 4402 IRDMA_QHASH_MANAGE_TYPE_ADD : 4403 IRDMA_QHASH_MANAGE_TYPE_DELETE; 4404 4405 nfo.vlan_id = vlan_id; 4406 nfo.ipv4 = ipv4; 4407 nfo.qh_qpid = 1; 4408 4409 /* Disable or enable qhash for listeners */ 4410 spin_lock_irqsave(&cm_core->listen_list_lock, flags); 4411 list_for_each_entry (listen_node, &cm_core->listen_list, list) { 4412 if (vlan_id != listen_node->vlan_id || 4413 (memcmp(listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16) && 4414 memcmp(listen_node->loc_addr, ip_zero, ipv4 ? 4 : 16))) 4415 continue; 4416 4417 memcpy(nfo.loc_addr, listen_node->loc_addr, 4418 sizeof(nfo.loc_addr)); 4419 nfo.loc_port = listen_node->loc_port; 4420 nfo.user_pri = listen_node->user_pri; 4421 if (!list_empty(&listen_node->child_listen_list)) { 4422 irdma_qhash_ctrl(iwdev, listen_node, &nfo, ipaddr, ipv4, 4423 ifup); 4424 } else if (memcmp(listen_node->loc_addr, ip_zero, 4425 ipv4 ? 4 : 16)) { 4426 if (!irdma_manage_qhash(iwdev, &nfo, 4427 IRDMA_QHASH_TYPE_TCP_SYN, op, 4428 NULL, false)) 4429 listen_node->qhash_set = ifup; 4430 } 4431 } 4432 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); 4433 4434 /* disconnect any connected qp's on ifdown */ 4435 if (!ifup) 4436 irdma_cm_teardown_connections(iwdev, ipaddr, &nfo, false); 4437 } 4438