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