1 // SPDX-License-Identifier: GPL-2.0 or Linux-OpenIB 2 /* Copyright (c) 2015 - 2021 Intel Corporation */ 3 #include "main.h" 4 #include "trace.h" 5 6 static void irdma_cm_post_event(struct irdma_cm_event *event); 7 static void irdma_disconnect_worker(struct work_struct *work); 8 9 /** 10 * irdma_free_sqbuf - put back puda buffer if refcount is 0 11 * @vsi: The VSI structure of the device 12 * @bufp: puda buffer to free 13 */ 14 void irdma_free_sqbuf(struct irdma_sc_vsi *vsi, void *bufp) 15 { 16 struct irdma_puda_buf *buf = bufp; 17 struct irdma_puda_rsrc *ilq = vsi->ilq; 18 19 if (refcount_dec_and_test(&buf->refcount)) 20 irdma_puda_ret_bufpool(ilq, buf); 21 } 22 23 /** 24 * irdma_record_ird_ord - Record IRD/ORD passed in 25 * @cm_node: connection's node 26 * @conn_ird: connection IRD 27 * @conn_ord: connection ORD 28 */ 29 static void irdma_record_ird_ord(struct irdma_cm_node *cm_node, u32 conn_ird, 30 u32 conn_ord) 31 { 32 if (conn_ird > cm_node->dev->hw_attrs.max_hw_ird) 33 conn_ird = cm_node->dev->hw_attrs.max_hw_ird; 34 35 if (conn_ord > cm_node->dev->hw_attrs.max_hw_ord) 36 conn_ord = cm_node->dev->hw_attrs.max_hw_ord; 37 else if (!conn_ord && cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO) 38 conn_ord = 1; 39 cm_node->ird_size = conn_ird; 40 cm_node->ord_size = conn_ord; 41 } 42 43 /** 44 * irdma_copy_ip_ntohl - copy IP address from network to host 45 * @dst: IP address in host order 46 * @src: IP address in network order (big endian) 47 */ 48 void irdma_copy_ip_ntohl(u32 *dst, __be32 *src) 49 { 50 *dst++ = ntohl(*src++); 51 *dst++ = ntohl(*src++); 52 *dst++ = ntohl(*src++); 53 *dst = ntohl(*src); 54 } 55 56 /** 57 * irdma_copy_ip_htonl - copy IP address from host to network order 58 * @dst: IP address in network order (big endian) 59 * @src: IP address in host order 60 */ 61 void irdma_copy_ip_htonl(__be32 *dst, u32 *src) 62 { 63 *dst++ = htonl(*src++); 64 *dst++ = htonl(*src++); 65 *dst++ = htonl(*src++); 66 *dst = htonl(*src); 67 } 68 69 /** 70 * irdma_get_addr_info 71 * @cm_node: contains ip/tcp info 72 * @cm_info: to get a copy of the cm_node ip/tcp info 73 */ 74 static void irdma_get_addr_info(struct irdma_cm_node *cm_node, 75 struct irdma_cm_info *cm_info) 76 { 77 memset(cm_info, 0, sizeof(*cm_info)); 78 cm_info->ipv4 = cm_node->ipv4; 79 cm_info->vlan_id = cm_node->vlan_id; 80 memcpy(cm_info->loc_addr, cm_node->loc_addr, sizeof(cm_info->loc_addr)); 81 memcpy(cm_info->rem_addr, cm_node->rem_addr, sizeof(cm_info->rem_addr)); 82 cm_info->loc_port = cm_node->loc_port; 83 cm_info->rem_port = cm_node->rem_port; 84 } 85 86 /** 87 * irdma_fill_sockaddr4 - fill in addr info for IPv4 connection 88 * @cm_node: connection's node 89 * @event: upper layer's cm event 90 */ 91 static inline void irdma_fill_sockaddr4(struct irdma_cm_node *cm_node, 92 struct iw_cm_event *event) 93 { 94 struct sockaddr_in *laddr = (struct sockaddr_in *)&event->local_addr; 95 struct sockaddr_in *raddr = (struct sockaddr_in *)&event->remote_addr; 96 97 laddr->sin_family = AF_INET; 98 raddr->sin_family = AF_INET; 99 100 laddr->sin_port = htons(cm_node->loc_port); 101 raddr->sin_port = htons(cm_node->rem_port); 102 103 laddr->sin_addr.s_addr = htonl(cm_node->loc_addr[0]); 104 raddr->sin_addr.s_addr = htonl(cm_node->rem_addr[0]); 105 } 106 107 /** 108 * irdma_fill_sockaddr6 - fill in addr info for IPv6 connection 109 * @cm_node: connection's node 110 * @event: upper layer's cm event 111 */ 112 static inline void irdma_fill_sockaddr6(struct irdma_cm_node *cm_node, 113 struct iw_cm_event *event) 114 { 115 struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)&event->local_addr; 116 struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)&event->remote_addr; 117 118 laddr6->sin6_family = AF_INET6; 119 raddr6->sin6_family = AF_INET6; 120 121 laddr6->sin6_port = htons(cm_node->loc_port); 122 raddr6->sin6_port = htons(cm_node->rem_port); 123 124 irdma_copy_ip_htonl(laddr6->sin6_addr.in6_u.u6_addr32, 125 cm_node->loc_addr); 126 irdma_copy_ip_htonl(raddr6->sin6_addr.in6_u.u6_addr32, 127 cm_node->rem_addr); 128 } 129 130 /** 131 * irdma_get_cmevent_info - for cm event upcall 132 * @cm_node: connection's node 133 * @cm_id: upper layers cm struct for the event 134 * @event: upper layer's cm event 135 */ 136 static inline void irdma_get_cmevent_info(struct irdma_cm_node *cm_node, 137 struct iw_cm_id *cm_id, 138 struct iw_cm_event *event) 139 { 140 memcpy(&event->local_addr, &cm_id->m_local_addr, 141 sizeof(event->local_addr)); 142 memcpy(&event->remote_addr, &cm_id->m_remote_addr, 143 sizeof(event->remote_addr)); 144 if (cm_node) { 145 event->private_data = cm_node->pdata_buf; 146 event->private_data_len = (u8)cm_node->pdata.size; 147 event->ird = cm_node->ird_size; 148 event->ord = cm_node->ord_size; 149 } 150 } 151 152 /** 153 * irdma_send_cm_event - upcall cm's event handler 154 * @cm_node: connection's node 155 * @cm_id: upper layer's cm info struct 156 * @type: Event type to indicate 157 * @status: status for the event type 158 */ 159 static int irdma_send_cm_event(struct irdma_cm_node *cm_node, 160 struct iw_cm_id *cm_id, 161 enum iw_cm_event_type type, int status) 162 { 163 struct iw_cm_event event = {}; 164 165 event.event = type; 166 event.status = status; 167 trace_irdma_send_cm_event(cm_node, cm_id, type, status, 168 __builtin_return_address(0)); 169 170 ibdev_dbg(&cm_node->iwdev->ibdev, 171 "CM: cm_node %p cm_id=%p state=%d accel=%d event_type=%d status=%d\n", 172 cm_node, cm_id, cm_node->accelerated, cm_node->state, type, 173 status); 174 175 switch (type) { 176 case IW_CM_EVENT_CONNECT_REQUEST: 177 if (cm_node->ipv4) 178 irdma_fill_sockaddr4(cm_node, &event); 179 else 180 irdma_fill_sockaddr6(cm_node, &event); 181 event.provider_data = cm_node; 182 event.private_data = cm_node->pdata_buf; 183 event.private_data_len = (u8)cm_node->pdata.size; 184 event.ird = cm_node->ird_size; 185 break; 186 case IW_CM_EVENT_CONNECT_REPLY: 187 irdma_get_cmevent_info(cm_node, cm_id, &event); 188 break; 189 case IW_CM_EVENT_ESTABLISHED: 190 event.ird = cm_node->ird_size; 191 event.ord = cm_node->ord_size; 192 break; 193 case IW_CM_EVENT_DISCONNECT: 194 case IW_CM_EVENT_CLOSE: 195 /* Wait if we are in RTS but havent issued the iwcm event upcall */ 196 if (!cm_node->accelerated) 197 wait_for_completion(&cm_node->establish_comp); 198 break; 199 default: 200 return -EINVAL; 201 } 202 203 return cm_id->event_handler(cm_id, &event); 204 } 205 206 /** 207 * irdma_timer_list_prep - add connection nodes to a list to perform timer tasks 208 * @cm_core: cm's core 209 * @timer_list: a timer list to which cm_node will be selected 210 */ 211 static void irdma_timer_list_prep(struct irdma_cm_core *cm_core, 212 struct list_head *timer_list) 213 { 214 struct irdma_cm_node *cm_node; 215 int bkt; 216 217 hash_for_each_rcu(cm_core->cm_hash_tbl, bkt, cm_node, list) { 218 if ((cm_node->close_entry || cm_node->send_entry) && 219 refcount_inc_not_zero(&cm_node->refcnt)) 220 list_add(&cm_node->timer_entry, timer_list); 221 } 222 } 223 224 /** 225 * irdma_create_event - create cm event 226 * @cm_node: connection's node 227 * @type: Event type to generate 228 */ 229 static struct irdma_cm_event *irdma_create_event(struct irdma_cm_node *cm_node, 230 enum irdma_cm_event_type type) 231 { 232 struct irdma_cm_event *event; 233 234 if (!cm_node->cm_id) 235 return NULL; 236 237 event = kzalloc(sizeof(*event), GFP_ATOMIC); 238 239 if (!event) 240 return NULL; 241 242 event->type = type; 243 event->cm_node = cm_node; 244 memcpy(event->cm_info.rem_addr, cm_node->rem_addr, 245 sizeof(event->cm_info.rem_addr)); 246 memcpy(event->cm_info.loc_addr, cm_node->loc_addr, 247 sizeof(event->cm_info.loc_addr)); 248 event->cm_info.rem_port = cm_node->rem_port; 249 event->cm_info.loc_port = cm_node->loc_port; 250 event->cm_info.cm_id = cm_node->cm_id; 251 ibdev_dbg(&cm_node->iwdev->ibdev, 252 "CM: node=%p event=%p type=%u dst=%pI4 src=%pI4\n", cm_node, 253 event, type, event->cm_info.loc_addr, 254 event->cm_info.rem_addr); 255 trace_irdma_create_event(cm_node, type, __builtin_return_address(0)); 256 irdma_cm_post_event(event); 257 258 return event; 259 } 260 261 /** 262 * irdma_free_retrans_entry - free send entry 263 * @cm_node: connection's node 264 */ 265 static void irdma_free_retrans_entry(struct irdma_cm_node *cm_node) 266 { 267 struct irdma_device *iwdev = cm_node->iwdev; 268 struct irdma_timer_entry *send_entry; 269 270 send_entry = cm_node->send_entry; 271 if (!send_entry) 272 return; 273 274 cm_node->send_entry = NULL; 275 irdma_free_sqbuf(&iwdev->vsi, send_entry->sqbuf); 276 kfree(send_entry); 277 refcount_dec(&cm_node->refcnt); 278 } 279 280 /** 281 * irdma_cleanup_retrans_entry - free send entry with lock 282 * @cm_node: connection's node 283 */ 284 static void irdma_cleanup_retrans_entry(struct irdma_cm_node *cm_node) 285 { 286 unsigned long flags; 287 288 spin_lock_irqsave(&cm_node->retrans_list_lock, flags); 289 irdma_free_retrans_entry(cm_node); 290 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); 291 } 292 293 /** 294 * irdma_form_ah_cm_frame - get a free packet and build frame with address handle 295 * @cm_node: connection's node ionfo to use in frame 296 * @options: pointer to options info 297 * @hdr: pointer mpa header 298 * @pdata: pointer to private data 299 * @flags: indicates FIN or ACK 300 */ 301 static struct irdma_puda_buf *irdma_form_ah_cm_frame(struct irdma_cm_node *cm_node, 302 struct irdma_kmem_info *options, 303 struct irdma_kmem_info *hdr, 304 struct irdma_mpa_priv_info *pdata, 305 u8 flags) 306 { 307 struct irdma_puda_buf *sqbuf; 308 struct irdma_sc_vsi *vsi = &cm_node->iwdev->vsi; 309 u8 *buf; 310 struct tcphdr *tcph; 311 u16 pktsize; 312 u32 opts_len = 0; 313 u32 pd_len = 0; 314 u32 hdr_len = 0; 315 316 if (!cm_node->ah || !cm_node->ah->ah_info.ah_valid) { 317 ibdev_dbg(&cm_node->iwdev->ibdev, "CM: AH invalid\n"); 318 return NULL; 319 } 320 321 sqbuf = irdma_puda_get_bufpool(vsi->ilq); 322 if (!sqbuf) { 323 ibdev_dbg(&cm_node->iwdev->ibdev, "CM: SQ buf NULL\n"); 324 return NULL; 325 } 326 327 sqbuf->ah_id = cm_node->ah->ah_info.ah_idx; 328 buf = sqbuf->mem.va; 329 if (options) 330 opts_len = (u32)options->size; 331 332 if (hdr) 333 hdr_len = hdr->size; 334 335 if (pdata) 336 pd_len = pdata->size; 337 338 pktsize = sizeof(*tcph) + opts_len + hdr_len + pd_len; 339 340 memset(buf, 0, pktsize); 341 342 sqbuf->totallen = pktsize; 343 sqbuf->tcphlen = sizeof(*tcph) + opts_len; 344 sqbuf->scratch = cm_node; 345 346 tcph = (struct tcphdr *)buf; 347 buf += sizeof(*tcph); 348 349 tcph->source = htons(cm_node->loc_port); 350 tcph->dest = htons(cm_node->rem_port); 351 tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num); 352 353 if (flags & SET_ACK) { 354 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt; 355 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num); 356 tcph->ack = 1; 357 } else { 358 tcph->ack_seq = 0; 359 } 360 361 if (flags & SET_SYN) { 362 cm_node->tcp_cntxt.loc_seq_num++; 363 tcph->syn = 1; 364 } else { 365 cm_node->tcp_cntxt.loc_seq_num += hdr_len + pd_len; 366 } 367 368 if (flags & SET_FIN) { 369 cm_node->tcp_cntxt.loc_seq_num++; 370 tcph->fin = 1; 371 } 372 373 if (flags & SET_RST) 374 tcph->rst = 1; 375 376 tcph->doff = (u16)((sizeof(*tcph) + opts_len + 3) >> 2); 377 sqbuf->tcphlen = tcph->doff << 2; 378 tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd); 379 tcph->urg_ptr = 0; 380 381 if (opts_len) { 382 memcpy(buf, options->addr, opts_len); 383 buf += opts_len; 384 } 385 386 if (hdr_len) { 387 memcpy(buf, hdr->addr, hdr_len); 388 buf += hdr_len; 389 } 390 391 if (pdata && pdata->addr) 392 memcpy(buf, pdata->addr, pdata->size); 393 394 refcount_set(&sqbuf->refcount, 1); 395 396 print_hex_dump_debug("ILQ: TRANSMIT ILQ BUFFER", DUMP_PREFIX_OFFSET, 397 16, 8, sqbuf->mem.va, sqbuf->totallen, false); 398 399 return sqbuf; 400 } 401 402 /** 403 * irdma_form_uda_cm_frame - get a free packet and build frame full tcpip packet 404 * @cm_node: connection's node ionfo to use in frame 405 * @options: pointer to options info 406 * @hdr: pointer mpa header 407 * @pdata: pointer to private data 408 * @flags: indicates FIN or ACK 409 */ 410 static struct irdma_puda_buf *irdma_form_uda_cm_frame(struct irdma_cm_node *cm_node, 411 struct irdma_kmem_info *options, 412 struct irdma_kmem_info *hdr, 413 struct irdma_mpa_priv_info *pdata, 414 u8 flags) 415 { 416 struct irdma_puda_buf *sqbuf; 417 struct irdma_sc_vsi *vsi = &cm_node->iwdev->vsi; 418 u8 *buf; 419 420 struct tcphdr *tcph; 421 struct iphdr *iph; 422 struct ipv6hdr *ip6h; 423 struct ethhdr *ethh; 424 u16 pktsize; 425 u16 eth_hlen = ETH_HLEN; 426 u32 opts_len = 0; 427 u32 pd_len = 0; 428 u32 hdr_len = 0; 429 430 u16 vtag; 431 432 sqbuf = irdma_puda_get_bufpool(vsi->ilq); 433 if (!sqbuf) 434 return NULL; 435 436 buf = sqbuf->mem.va; 437 438 if (options) 439 opts_len = (u32)options->size; 440 441 if (hdr) 442 hdr_len = hdr->size; 443 444 if (pdata) 445 pd_len = pdata->size; 446 447 if (cm_node->vlan_id < VLAN_N_VID) 448 eth_hlen += 4; 449 450 if (cm_node->ipv4) 451 pktsize = sizeof(*iph) + sizeof(*tcph); 452 else 453 pktsize = sizeof(*ip6h) + sizeof(*tcph); 454 pktsize += opts_len + hdr_len + pd_len; 455 456 memset(buf, 0, eth_hlen + pktsize); 457 458 sqbuf->totallen = pktsize + eth_hlen; 459 sqbuf->maclen = eth_hlen; 460 sqbuf->tcphlen = sizeof(*tcph) + opts_len; 461 sqbuf->scratch = cm_node; 462 463 ethh = (struct ethhdr *)buf; 464 buf += eth_hlen; 465 466 if (cm_node->do_lpb) 467 sqbuf->do_lpb = true; 468 469 if (cm_node->ipv4) { 470 sqbuf->ipv4 = true; 471 472 iph = (struct iphdr *)buf; 473 buf += sizeof(*iph); 474 tcph = (struct tcphdr *)buf; 475 buf += sizeof(*tcph); 476 477 ether_addr_copy(ethh->h_dest, cm_node->rem_mac); 478 ether_addr_copy(ethh->h_source, cm_node->loc_mac); 479 if (cm_node->vlan_id < VLAN_N_VID) { 480 ((struct vlan_ethhdr *)ethh)->h_vlan_proto = 481 htons(ETH_P_8021Q); 482 vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) | 483 cm_node->vlan_id; 484 ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(vtag); 485 486 ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = 487 htons(ETH_P_IP); 488 } else { 489 ethh->h_proto = htons(ETH_P_IP); 490 } 491 492 iph->version = IPVERSION; 493 iph->ihl = 5; /* 5 * 4Byte words, IP headr len */ 494 iph->tos = cm_node->tos; 495 iph->tot_len = htons(pktsize); 496 iph->id = htons(++cm_node->tcp_cntxt.loc_id); 497 498 iph->frag_off = htons(0x4000); 499 iph->ttl = 0x40; 500 iph->protocol = IPPROTO_TCP; 501 iph->saddr = htonl(cm_node->loc_addr[0]); 502 iph->daddr = htonl(cm_node->rem_addr[0]); 503 } else { 504 sqbuf->ipv4 = false; 505 ip6h = (struct ipv6hdr *)buf; 506 buf += sizeof(*ip6h); 507 tcph = (struct tcphdr *)buf; 508 buf += sizeof(*tcph); 509 510 ether_addr_copy(ethh->h_dest, cm_node->rem_mac); 511 ether_addr_copy(ethh->h_source, cm_node->loc_mac); 512 if (cm_node->vlan_id < VLAN_N_VID) { 513 ((struct vlan_ethhdr *)ethh)->h_vlan_proto = 514 htons(ETH_P_8021Q); 515 vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) | 516 cm_node->vlan_id; 517 ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(vtag); 518 ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = 519 htons(ETH_P_IPV6); 520 } else { 521 ethh->h_proto = htons(ETH_P_IPV6); 522 } 523 ip6h->version = 6; 524 ip6h->priority = cm_node->tos >> 4; 525 ip6h->flow_lbl[0] = cm_node->tos << 4; 526 ip6h->flow_lbl[1] = 0; 527 ip6h->flow_lbl[2] = 0; 528 ip6h->payload_len = htons(pktsize - sizeof(*ip6h)); 529 ip6h->nexthdr = 6; 530 ip6h->hop_limit = 128; 531 irdma_copy_ip_htonl(ip6h->saddr.in6_u.u6_addr32, 532 cm_node->loc_addr); 533 irdma_copy_ip_htonl(ip6h->daddr.in6_u.u6_addr32, 534 cm_node->rem_addr); 535 } 536 537 tcph->source = htons(cm_node->loc_port); 538 tcph->dest = htons(cm_node->rem_port); 539 tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num); 540 541 if (flags & SET_ACK) { 542 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt; 543 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num); 544 tcph->ack = 1; 545 } else { 546 tcph->ack_seq = 0; 547 } 548 549 if (flags & SET_SYN) { 550 cm_node->tcp_cntxt.loc_seq_num++; 551 tcph->syn = 1; 552 } else { 553 cm_node->tcp_cntxt.loc_seq_num += hdr_len + pd_len; 554 } 555 556 if (flags & SET_FIN) { 557 cm_node->tcp_cntxt.loc_seq_num++; 558 tcph->fin = 1; 559 } 560 561 if (flags & SET_RST) 562 tcph->rst = 1; 563 564 tcph->doff = (u16)((sizeof(*tcph) + opts_len + 3) >> 2); 565 sqbuf->tcphlen = tcph->doff << 2; 566 tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd); 567 tcph->urg_ptr = 0; 568 569 if (opts_len) { 570 memcpy(buf, options->addr, opts_len); 571 buf += opts_len; 572 } 573 574 if (hdr_len) { 575 memcpy(buf, hdr->addr, hdr_len); 576 buf += hdr_len; 577 } 578 579 if (pdata && pdata->addr) 580 memcpy(buf, pdata->addr, pdata->size); 581 582 refcount_set(&sqbuf->refcount, 1); 583 584 print_hex_dump_debug("ILQ: TRANSMIT ILQ BUFFER", DUMP_PREFIX_OFFSET, 585 16, 8, sqbuf->mem.va, sqbuf->totallen, false); 586 return sqbuf; 587 } 588 589 /** 590 * irdma_send_reset - Send RST packet 591 * @cm_node: connection's node 592 */ 593 int irdma_send_reset(struct irdma_cm_node *cm_node) 594 { 595 struct irdma_puda_buf *sqbuf; 596 int flags = SET_RST | SET_ACK; 597 598 trace_irdma_send_reset(cm_node, 0, __builtin_return_address(0)); 599 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, NULL, NULL, 600 flags); 601 if (!sqbuf) 602 return -ENOMEM; 603 604 ibdev_dbg(&cm_node->iwdev->ibdev, 605 "CM: caller: %pS cm_node %p cm_id=%p accel=%d state=%d rem_port=0x%04x, loc_port=0x%04x rem_addr=%pI4 loc_addr=%pI4\n", 606 __builtin_return_address(0), cm_node, cm_node->cm_id, 607 cm_node->accelerated, cm_node->state, cm_node->rem_port, 608 cm_node->loc_port, cm_node->rem_addr, cm_node->loc_addr); 609 610 return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 0, 611 1); 612 } 613 614 /** 615 * irdma_active_open_err - send event for active side cm error 616 * @cm_node: connection's node 617 * @reset: Flag to send reset or not 618 */ 619 static void irdma_active_open_err(struct irdma_cm_node *cm_node, bool reset) 620 { 621 trace_irdma_active_open_err(cm_node, reset, 622 __builtin_return_address(0)); 623 irdma_cleanup_retrans_entry(cm_node); 624 cm_node->cm_core->stats_connect_errs++; 625 if (reset) { 626 ibdev_dbg(&cm_node->iwdev->ibdev, 627 "CM: cm_node=%p state=%d\n", cm_node, 628 cm_node->state); 629 refcount_inc(&cm_node->refcnt); 630 irdma_send_reset(cm_node); 631 } 632 633 cm_node->state = IRDMA_CM_STATE_CLOSED; 634 irdma_create_event(cm_node, IRDMA_CM_EVENT_ABORTED); 635 } 636 637 /** 638 * irdma_passive_open_err - handle passive side cm error 639 * @cm_node: connection's node 640 * @reset: send reset or just free cm_node 641 */ 642 static void irdma_passive_open_err(struct irdma_cm_node *cm_node, bool reset) 643 { 644 irdma_cleanup_retrans_entry(cm_node); 645 cm_node->cm_core->stats_passive_errs++; 646 cm_node->state = IRDMA_CM_STATE_CLOSED; 647 ibdev_dbg(&cm_node->iwdev->ibdev, "CM: cm_node=%p state =%d\n", 648 cm_node, cm_node->state); 649 trace_irdma_passive_open_err(cm_node, reset, 650 __builtin_return_address(0)); 651 if (reset) 652 irdma_send_reset(cm_node); 653 else 654 irdma_rem_ref_cm_node(cm_node); 655 } 656 657 /** 658 * irdma_event_connect_error - to create connect error event 659 * @event: cm information for connect event 660 */ 661 static void irdma_event_connect_error(struct irdma_cm_event *event) 662 { 663 struct irdma_qp *iwqp; 664 struct iw_cm_id *cm_id; 665 666 cm_id = event->cm_node->cm_id; 667 if (!cm_id) 668 return; 669 670 iwqp = cm_id->provider_data; 671 672 if (!iwqp || !iwqp->iwdev) 673 return; 674 675 iwqp->cm_id = NULL; 676 cm_id->provider_data = NULL; 677 irdma_send_cm_event(event->cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 678 -ECONNRESET); 679 irdma_rem_ref_cm_node(event->cm_node); 680 } 681 682 /** 683 * irdma_process_options - process options from TCP header 684 * @cm_node: connection's node 685 * @optionsloc: point to start of options 686 * @optionsize: size of all options 687 * @syn_pkt: flag if syn packet 688 */ 689 static int irdma_process_options(struct irdma_cm_node *cm_node, u8 *optionsloc, 690 u32 optionsize, u32 syn_pkt) 691 { 692 u32 tmp; 693 u32 offset = 0; 694 union all_known_options *all_options; 695 char got_mss_option = 0; 696 697 while (offset < optionsize) { 698 all_options = (union all_known_options *)(optionsloc + offset); 699 switch (all_options->base.optionnum) { 700 case OPTION_NUM_EOL: 701 offset = optionsize; 702 break; 703 case OPTION_NUM_NONE: 704 offset += 1; 705 continue; 706 case OPTION_NUM_MSS: 707 ibdev_dbg(&cm_node->iwdev->ibdev, 708 "CM: MSS Length: %d Offset: %d Size: %d\n", 709 all_options->mss.len, offset, optionsize); 710 got_mss_option = 1; 711 if (all_options->mss.len != 4) 712 return -EINVAL; 713 tmp = ntohs(all_options->mss.mss); 714 if ((cm_node->ipv4 && 715 (tmp + IRDMA_MTU_TO_MSS_IPV4) < IRDMA_MIN_MTU_IPV4) || 716 (!cm_node->ipv4 && 717 (tmp + IRDMA_MTU_TO_MSS_IPV6) < IRDMA_MIN_MTU_IPV6)) 718 return -EINVAL; 719 if (tmp < cm_node->tcp_cntxt.mss) 720 cm_node->tcp_cntxt.mss = tmp; 721 break; 722 case OPTION_NUM_WINDOW_SCALE: 723 cm_node->tcp_cntxt.snd_wscale = 724 all_options->windowscale.shiftcount; 725 break; 726 default: 727 ibdev_dbg(&cm_node->iwdev->ibdev, 728 "CM: Unsupported TCP Option: %x\n", 729 all_options->base.optionnum); 730 break; 731 } 732 offset += all_options->base.len; 733 } 734 if (!got_mss_option && syn_pkt) 735 cm_node->tcp_cntxt.mss = IRDMA_CM_DEFAULT_MSS; 736 737 return 0; 738 } 739 740 /** 741 * irdma_handle_tcp_options - setup TCP context info after parsing TCP options 742 * @cm_node: connection's node 743 * @tcph: pointer tcp header 744 * @optionsize: size of options rcvd 745 * @passive: active or passive flag 746 */ 747 static int irdma_handle_tcp_options(struct irdma_cm_node *cm_node, 748 struct tcphdr *tcph, int optionsize, 749 int passive) 750 { 751 u8 *optionsloc = (u8 *)&tcph[1]; 752 int ret; 753 754 if (optionsize) { 755 ret = irdma_process_options(cm_node, optionsloc, optionsize, 756 (u32)tcph->syn); 757 if (ret) { 758 ibdev_dbg(&cm_node->iwdev->ibdev, 759 "CM: Node %p, Sending Reset\n", cm_node); 760 if (passive) 761 irdma_passive_open_err(cm_node, true); 762 else 763 irdma_active_open_err(cm_node, true); 764 return ret; 765 } 766 } 767 768 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) 769 << cm_node->tcp_cntxt.snd_wscale; 770 771 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd) 772 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd; 773 774 return 0; 775 } 776 777 /** 778 * irdma_build_mpa_v1 - build a MPA V1 frame 779 * @cm_node: connection's node 780 * @start_addr: address where to build frame 781 * @mpa_key: to do read0 or write0 782 */ 783 static void irdma_build_mpa_v1(struct irdma_cm_node *cm_node, void *start_addr, 784 u8 mpa_key) 785 { 786 struct ietf_mpa_v1 *mpa_frame = start_addr; 787 788 switch (mpa_key) { 789 case MPA_KEY_REQUEST: 790 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE); 791 break; 792 case MPA_KEY_REPLY: 793 memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE); 794 break; 795 default: 796 break; 797 } 798 mpa_frame->flags = IETF_MPA_FLAGS_CRC; 799 mpa_frame->rev = cm_node->mpa_frame_rev; 800 mpa_frame->priv_data_len = htons(cm_node->pdata.size); 801 } 802 803 /** 804 * irdma_build_mpa_v2 - build a MPA V2 frame 805 * @cm_node: connection's node 806 * @start_addr: buffer start address 807 * @mpa_key: to do read0 or write0 808 */ 809 static void irdma_build_mpa_v2(struct irdma_cm_node *cm_node, void *start_addr, 810 u8 mpa_key) 811 { 812 struct ietf_mpa_v2 *mpa_frame = start_addr; 813 struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg; 814 u16 ctrl_ird, ctrl_ord; 815 816 /* initialize the upper 5 bytes of the frame */ 817 irdma_build_mpa_v1(cm_node, start_addr, mpa_key); 818 mpa_frame->flags |= IETF_MPA_V2_FLAG; 819 if (cm_node->iwdev->iw_ooo) { 820 mpa_frame->flags |= IETF_MPA_FLAGS_MARKERS; 821 cm_node->rcv_mark_en = true; 822 } 823 mpa_frame->priv_data_len = cpu_to_be16(be16_to_cpu(mpa_frame->priv_data_len) + 824 IETF_RTR_MSG_SIZE); 825 826 /* initialize RTR msg */ 827 if (cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) { 828 ctrl_ird = IETF_NO_IRD_ORD; 829 ctrl_ord = IETF_NO_IRD_ORD; 830 } else { 831 ctrl_ird = (cm_node->ird_size > IETF_NO_IRD_ORD) ? 832 IETF_NO_IRD_ORD : 833 cm_node->ird_size; 834 ctrl_ord = (cm_node->ord_size > IETF_NO_IRD_ORD) ? 835 IETF_NO_IRD_ORD : 836 cm_node->ord_size; 837 } 838 ctrl_ird |= IETF_PEER_TO_PEER; 839 840 switch (mpa_key) { 841 case MPA_KEY_REQUEST: 842 ctrl_ord |= IETF_RDMA0_WRITE; 843 ctrl_ord |= IETF_RDMA0_READ; 844 break; 845 case MPA_KEY_REPLY: 846 switch (cm_node->send_rdma0_op) { 847 case SEND_RDMA_WRITE_ZERO: 848 ctrl_ord |= IETF_RDMA0_WRITE; 849 break; 850 case SEND_RDMA_READ_ZERO: 851 ctrl_ord |= IETF_RDMA0_READ; 852 break; 853 } 854 break; 855 default: 856 break; 857 } 858 rtr_msg->ctrl_ird = htons(ctrl_ird); 859 rtr_msg->ctrl_ord = htons(ctrl_ord); 860 } 861 862 /** 863 * irdma_cm_build_mpa_frame - build mpa frame for mpa version 1 or version 2 864 * @cm_node: connection's node 865 * @mpa: mpa: data buffer 866 * @mpa_key: to do read0 or write0 867 */ 868 static int irdma_cm_build_mpa_frame(struct irdma_cm_node *cm_node, 869 struct irdma_kmem_info *mpa, u8 mpa_key) 870 { 871 int hdr_len = 0; 872 873 switch (cm_node->mpa_frame_rev) { 874 case IETF_MPA_V1: 875 hdr_len = sizeof(struct ietf_mpa_v1); 876 irdma_build_mpa_v1(cm_node, mpa->addr, mpa_key); 877 break; 878 case IETF_MPA_V2: 879 hdr_len = sizeof(struct ietf_mpa_v2); 880 irdma_build_mpa_v2(cm_node, mpa->addr, mpa_key); 881 break; 882 default: 883 break; 884 } 885 886 return hdr_len; 887 } 888 889 /** 890 * irdma_send_mpa_request - active node send mpa request to passive node 891 * @cm_node: connection's node 892 */ 893 static int irdma_send_mpa_request(struct irdma_cm_node *cm_node) 894 { 895 struct irdma_puda_buf *sqbuf; 896 897 cm_node->mpa_hdr.addr = &cm_node->mpa_v2_frame; 898 cm_node->mpa_hdr.size = irdma_cm_build_mpa_frame(cm_node, 899 &cm_node->mpa_hdr, 900 MPA_KEY_REQUEST); 901 if (!cm_node->mpa_hdr.size) { 902 ibdev_dbg(&cm_node->iwdev->ibdev, 903 "CM: mpa size = %d\n", cm_node->mpa_hdr.size); 904 return -EINVAL; 905 } 906 907 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, 908 &cm_node->mpa_hdr, 909 &cm_node->pdata, SET_ACK); 910 if (!sqbuf) 911 return -ENOMEM; 912 913 return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 1, 914 0); 915 } 916 917 /** 918 * irdma_send_mpa_reject - 919 * @cm_node: connection's node 920 * @pdata: reject data for connection 921 * @plen: length of reject data 922 */ 923 static int irdma_send_mpa_reject(struct irdma_cm_node *cm_node, 924 const void *pdata, u8 plen) 925 { 926 struct irdma_puda_buf *sqbuf; 927 struct irdma_mpa_priv_info priv_info; 928 929 cm_node->mpa_hdr.addr = &cm_node->mpa_v2_frame; 930 cm_node->mpa_hdr.size = irdma_cm_build_mpa_frame(cm_node, 931 &cm_node->mpa_hdr, 932 MPA_KEY_REPLY); 933 934 cm_node->mpa_frame.flags |= IETF_MPA_FLAGS_REJECT; 935 priv_info.addr = pdata; 936 priv_info.size = plen; 937 938 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, 939 &cm_node->mpa_hdr, &priv_info, 940 SET_ACK | SET_FIN); 941 if (!sqbuf) 942 return -ENOMEM; 943 944 cm_node->state = IRDMA_CM_STATE_FIN_WAIT1; 945 946 return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 1, 947 0); 948 } 949 950 /** 951 * irdma_negotiate_mpa_v2_ird_ord - negotiate MPAv2 IRD/ORD 952 * @cm_node: connection's node 953 * @buf: Data pointer 954 */ 955 static int irdma_negotiate_mpa_v2_ird_ord(struct irdma_cm_node *cm_node, 956 u8 *buf) 957 { 958 struct ietf_mpa_v2 *mpa_v2_frame; 959 struct ietf_rtr_msg *rtr_msg; 960 u16 ird_size; 961 u16 ord_size; 962 u16 ctrl_ord; 963 u16 ctrl_ird; 964 965 mpa_v2_frame = (struct ietf_mpa_v2 *)buf; 966 rtr_msg = &mpa_v2_frame->rtr_msg; 967 968 /* parse rtr message */ 969 ctrl_ord = ntohs(rtr_msg->ctrl_ord); 970 ctrl_ird = ntohs(rtr_msg->ctrl_ird); 971 ird_size = ctrl_ird & IETF_NO_IRD_ORD; 972 ord_size = ctrl_ord & IETF_NO_IRD_ORD; 973 974 if (!(ctrl_ird & IETF_PEER_TO_PEER)) 975 return -EOPNOTSUPP; 976 977 if (ird_size == IETF_NO_IRD_ORD || ord_size == IETF_NO_IRD_ORD) { 978 cm_node->mpav2_ird_ord = IETF_NO_IRD_ORD; 979 goto negotiate_done; 980 } 981 982 if (cm_node->state != IRDMA_CM_STATE_MPAREQ_SENT) { 983 /* responder */ 984 if (!ord_size && (ctrl_ord & IETF_RDMA0_READ)) 985 cm_node->ird_size = 1; 986 if (cm_node->ord_size > ird_size) 987 cm_node->ord_size = ird_size; 988 } else { 989 /* initiator */ 990 if (!ird_size && (ctrl_ord & IETF_RDMA0_READ)) 991 /* Remote peer doesn't support RDMA0_READ */ 992 return -EOPNOTSUPP; 993 994 if (cm_node->ord_size > ird_size) 995 cm_node->ord_size = ird_size; 996 997 if (cm_node->ird_size < ord_size) 998 /* no resources available */ 999 return -EINVAL; 1000 } 1001 1002 negotiate_done: 1003 if (ctrl_ord & IETF_RDMA0_READ) 1004 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO; 1005 else if (ctrl_ord & IETF_RDMA0_WRITE) 1006 cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO; 1007 else 1008 /* Not supported RDMA0 operation */ 1009 return -EOPNOTSUPP; 1010 1011 ibdev_dbg(&cm_node->iwdev->ibdev, 1012 "CM: MPAV2 Negotiated ORD: %d, IRD: %d\n", 1013 cm_node->ord_size, cm_node->ird_size); 1014 trace_irdma_negotiate_mpa_v2(cm_node); 1015 return 0; 1016 } 1017 1018 /** 1019 * irdma_parse_mpa - process an IETF MPA frame 1020 * @cm_node: connection's node 1021 * @buf: Data pointer 1022 * @type: to return accept or reject 1023 * @len: Len of mpa buffer 1024 */ 1025 static int irdma_parse_mpa(struct irdma_cm_node *cm_node, u8 *buf, u32 *type, 1026 u32 len) 1027 { 1028 struct ietf_mpa_v1 *mpa_frame; 1029 int mpa_hdr_len, priv_data_len, ret; 1030 1031 *type = IRDMA_MPA_REQUEST_ACCEPT; 1032 1033 if (len < sizeof(struct ietf_mpa_v1)) { 1034 ibdev_dbg(&cm_node->iwdev->ibdev, 1035 "CM: ietf buffer small (%x)\n", len); 1036 return -EINVAL; 1037 } 1038 1039 mpa_frame = (struct ietf_mpa_v1 *)buf; 1040 mpa_hdr_len = sizeof(struct ietf_mpa_v1); 1041 priv_data_len = ntohs(mpa_frame->priv_data_len); 1042 1043 if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) { 1044 ibdev_dbg(&cm_node->iwdev->ibdev, 1045 "CM: private_data too big %d\n", priv_data_len); 1046 return -EOVERFLOW; 1047 } 1048 1049 if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) { 1050 ibdev_dbg(&cm_node->iwdev->ibdev, 1051 "CM: unsupported mpa rev = %d\n", mpa_frame->rev); 1052 return -EINVAL; 1053 } 1054 1055 if (mpa_frame->rev > cm_node->mpa_frame_rev) { 1056 ibdev_dbg(&cm_node->iwdev->ibdev, "CM: rev %d\n", 1057 mpa_frame->rev); 1058 return -EINVAL; 1059 } 1060 1061 cm_node->mpa_frame_rev = mpa_frame->rev; 1062 if (cm_node->state != IRDMA_CM_STATE_MPAREQ_SENT) { 1063 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, 1064 IETF_MPA_KEY_SIZE)) { 1065 ibdev_dbg(&cm_node->iwdev->ibdev, 1066 "CM: Unexpected MPA Key received\n"); 1067 return -EINVAL; 1068 } 1069 } else { 1070 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, 1071 IETF_MPA_KEY_SIZE)) { 1072 ibdev_dbg(&cm_node->iwdev->ibdev, 1073 "CM: Unexpected MPA Key received\n"); 1074 return -EINVAL; 1075 } 1076 } 1077 1078 if (priv_data_len + mpa_hdr_len > len) { 1079 ibdev_dbg(&cm_node->iwdev->ibdev, 1080 "CM: ietf buffer len(%x + %x != %x)\n", 1081 priv_data_len, mpa_hdr_len, len); 1082 return -EOVERFLOW; 1083 } 1084 1085 if (len > IRDMA_MAX_CM_BUF) { 1086 ibdev_dbg(&cm_node->iwdev->ibdev, 1087 "CM: ietf buffer large len = %d\n", len); 1088 return -EOVERFLOW; 1089 } 1090 1091 switch (mpa_frame->rev) { 1092 case IETF_MPA_V2: 1093 mpa_hdr_len += IETF_RTR_MSG_SIZE; 1094 ret = irdma_negotiate_mpa_v2_ird_ord(cm_node, buf); 1095 if (ret) 1096 return ret; 1097 break; 1098 case IETF_MPA_V1: 1099 default: 1100 break; 1101 } 1102 1103 memcpy(cm_node->pdata_buf, buf + mpa_hdr_len, priv_data_len); 1104 cm_node->pdata.size = priv_data_len; 1105 1106 if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT) 1107 *type = IRDMA_MPA_REQUEST_REJECT; 1108 1109 if (mpa_frame->flags & IETF_MPA_FLAGS_MARKERS) 1110 cm_node->snd_mark_en = true; 1111 1112 return 0; 1113 } 1114 1115 /** 1116 * irdma_schedule_cm_timer 1117 * @cm_node: connection's node 1118 * @sqbuf: buffer to send 1119 * @type: if it is send or close 1120 * @send_retrans: if rexmits to be done 1121 * @close_when_complete: is cm_node to be removed 1122 * 1123 * note - cm_node needs to be protected before calling this. Encase in: 1124 * irdma_rem_ref_cm_node(cm_core, cm_node); 1125 * irdma_schedule_cm_timer(...) 1126 * refcount_inc(&cm_node->refcnt); 1127 */ 1128 int irdma_schedule_cm_timer(struct irdma_cm_node *cm_node, 1129 struct irdma_puda_buf *sqbuf, 1130 enum irdma_timer_type type, int send_retrans, 1131 int close_when_complete) 1132 { 1133 struct irdma_sc_vsi *vsi = &cm_node->iwdev->vsi; 1134 struct irdma_cm_core *cm_core = cm_node->cm_core; 1135 struct irdma_timer_entry *new_send; 1136 u32 was_timer_set; 1137 unsigned long flags; 1138 1139 new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC); 1140 if (!new_send) { 1141 if (type != IRDMA_TIMER_TYPE_CLOSE) 1142 irdma_free_sqbuf(vsi, sqbuf); 1143 return -ENOMEM; 1144 } 1145 1146 new_send->retrycount = IRDMA_DEFAULT_RETRYS; 1147 new_send->retranscount = IRDMA_DEFAULT_RETRANS; 1148 new_send->sqbuf = sqbuf; 1149 new_send->timetosend = jiffies; 1150 new_send->type = type; 1151 new_send->send_retrans = send_retrans; 1152 new_send->close_when_complete = close_when_complete; 1153 1154 if (type == IRDMA_TIMER_TYPE_CLOSE) { 1155 new_send->timetosend += (HZ / 10); 1156 if (cm_node->close_entry) { 1157 kfree(new_send); 1158 ibdev_dbg(&cm_node->iwdev->ibdev, 1159 "CM: already close entry\n"); 1160 return -EINVAL; 1161 } 1162 1163 cm_node->close_entry = new_send; 1164 } else { /* type == IRDMA_TIMER_TYPE_SEND */ 1165 spin_lock_irqsave(&cm_node->retrans_list_lock, flags); 1166 cm_node->send_entry = new_send; 1167 refcount_inc(&cm_node->refcnt); 1168 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); 1169 new_send->timetosend = jiffies + IRDMA_RETRY_TIMEOUT; 1170 1171 refcount_inc(&sqbuf->refcount); 1172 irdma_puda_send_buf(vsi->ilq, sqbuf); 1173 if (!send_retrans) { 1174 irdma_cleanup_retrans_entry(cm_node); 1175 if (close_when_complete) 1176 irdma_rem_ref_cm_node(cm_node); 1177 return 0; 1178 } 1179 } 1180 1181 spin_lock_irqsave(&cm_core->ht_lock, flags); 1182 was_timer_set = timer_pending(&cm_core->tcp_timer); 1183 1184 if (!was_timer_set) { 1185 cm_core->tcp_timer.expires = new_send->timetosend; 1186 add_timer(&cm_core->tcp_timer); 1187 } 1188 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 1189 1190 return 0; 1191 } 1192 1193 /** 1194 * irdma_retrans_expired - Could not rexmit the packet 1195 * @cm_node: connection's node 1196 */ 1197 static void irdma_retrans_expired(struct irdma_cm_node *cm_node) 1198 { 1199 enum irdma_cm_node_state state = cm_node->state; 1200 1201 cm_node->state = IRDMA_CM_STATE_CLOSED; 1202 switch (state) { 1203 case IRDMA_CM_STATE_SYN_RCVD: 1204 case IRDMA_CM_STATE_CLOSING: 1205 irdma_rem_ref_cm_node(cm_node); 1206 break; 1207 case IRDMA_CM_STATE_FIN_WAIT1: 1208 case IRDMA_CM_STATE_LAST_ACK: 1209 irdma_send_reset(cm_node); 1210 break; 1211 default: 1212 refcount_inc(&cm_node->refcnt); 1213 irdma_send_reset(cm_node); 1214 irdma_create_event(cm_node, IRDMA_CM_EVENT_ABORTED); 1215 break; 1216 } 1217 } 1218 1219 /** 1220 * irdma_handle_close_entry - for handling retry/timeouts 1221 * @cm_node: connection's node 1222 * @rem_node: flag for remove cm_node 1223 */ 1224 static void irdma_handle_close_entry(struct irdma_cm_node *cm_node, 1225 u32 rem_node) 1226 { 1227 struct irdma_timer_entry *close_entry = cm_node->close_entry; 1228 struct irdma_qp *iwqp; 1229 unsigned long flags; 1230 1231 if (!close_entry) 1232 return; 1233 iwqp = (struct irdma_qp *)close_entry->sqbuf; 1234 if (iwqp) { 1235 spin_lock_irqsave(&iwqp->lock, flags); 1236 if (iwqp->cm_id) { 1237 iwqp->hw_tcp_state = IRDMA_TCP_STATE_CLOSED; 1238 iwqp->hw_iwarp_state = IRDMA_QP_STATE_ERROR; 1239 iwqp->last_aeq = IRDMA_AE_RESET_SENT; 1240 iwqp->ibqp_state = IB_QPS_ERR; 1241 spin_unlock_irqrestore(&iwqp->lock, flags); 1242 irdma_cm_disconn(iwqp); 1243 } else { 1244 spin_unlock_irqrestore(&iwqp->lock, flags); 1245 } 1246 } else if (rem_node) { 1247 /* TIME_WAIT state */ 1248 irdma_rem_ref_cm_node(cm_node); 1249 } 1250 1251 kfree(close_entry); 1252 cm_node->close_entry = NULL; 1253 } 1254 1255 /** 1256 * irdma_cm_timer_tick - system's timer expired callback 1257 * @t: Pointer to timer_list 1258 */ 1259 static void irdma_cm_timer_tick(struct timer_list *t) 1260 { 1261 unsigned long nexttimeout = jiffies + IRDMA_LONG_TIME; 1262 struct irdma_cm_node *cm_node; 1263 struct irdma_timer_entry *send_entry, *close_entry; 1264 struct list_head *list_core_temp; 1265 struct list_head *list_node; 1266 struct irdma_cm_core *cm_core = from_timer(cm_core, t, tcp_timer); 1267 struct irdma_sc_vsi *vsi; 1268 u32 settimer = 0; 1269 unsigned long timetosend; 1270 unsigned long flags; 1271 struct list_head timer_list; 1272 1273 INIT_LIST_HEAD(&timer_list); 1274 1275 rcu_read_lock(); 1276 irdma_timer_list_prep(cm_core, &timer_list); 1277 rcu_read_unlock(); 1278 1279 list_for_each_safe (list_node, list_core_temp, &timer_list) { 1280 cm_node = container_of(list_node, struct irdma_cm_node, 1281 timer_entry); 1282 close_entry = cm_node->close_entry; 1283 1284 if (close_entry) { 1285 if (time_after(close_entry->timetosend, jiffies)) { 1286 if (nexttimeout > close_entry->timetosend || 1287 !settimer) { 1288 nexttimeout = close_entry->timetosend; 1289 settimer = 1; 1290 } 1291 } else { 1292 irdma_handle_close_entry(cm_node, 1); 1293 } 1294 } 1295 1296 spin_lock_irqsave(&cm_node->retrans_list_lock, flags); 1297 1298 send_entry = cm_node->send_entry; 1299 if (!send_entry) 1300 goto done; 1301 if (time_after(send_entry->timetosend, jiffies)) { 1302 if (cm_node->state != IRDMA_CM_STATE_OFFLOADED) { 1303 if (nexttimeout > send_entry->timetosend || 1304 !settimer) { 1305 nexttimeout = send_entry->timetosend; 1306 settimer = 1; 1307 } 1308 } else { 1309 irdma_free_retrans_entry(cm_node); 1310 } 1311 goto done; 1312 } 1313 1314 if (cm_node->state == IRDMA_CM_STATE_OFFLOADED || 1315 cm_node->state == IRDMA_CM_STATE_CLOSED) { 1316 irdma_free_retrans_entry(cm_node); 1317 goto done; 1318 } 1319 1320 if (!send_entry->retranscount || !send_entry->retrycount) { 1321 irdma_free_retrans_entry(cm_node); 1322 1323 spin_unlock_irqrestore(&cm_node->retrans_list_lock, 1324 flags); 1325 irdma_retrans_expired(cm_node); 1326 cm_node->state = IRDMA_CM_STATE_CLOSED; 1327 spin_lock_irqsave(&cm_node->retrans_list_lock, flags); 1328 goto done; 1329 } 1330 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); 1331 1332 vsi = &cm_node->iwdev->vsi; 1333 if (!cm_node->ack_rcvd) { 1334 refcount_inc(&send_entry->sqbuf->refcount); 1335 irdma_puda_send_buf(vsi->ilq, send_entry->sqbuf); 1336 cm_node->cm_core->stats_pkt_retrans++; 1337 } 1338 1339 spin_lock_irqsave(&cm_node->retrans_list_lock, flags); 1340 if (send_entry->send_retrans) { 1341 send_entry->retranscount--; 1342 timetosend = (IRDMA_RETRY_TIMEOUT << 1343 (IRDMA_DEFAULT_RETRANS - 1344 send_entry->retranscount)); 1345 1346 send_entry->timetosend = jiffies + 1347 min(timetosend, IRDMA_MAX_TIMEOUT); 1348 if (nexttimeout > send_entry->timetosend || !settimer) { 1349 nexttimeout = send_entry->timetosend; 1350 settimer = 1; 1351 } 1352 } else { 1353 int close_when_complete; 1354 1355 close_when_complete = send_entry->close_when_complete; 1356 irdma_free_retrans_entry(cm_node); 1357 if (close_when_complete) 1358 irdma_rem_ref_cm_node(cm_node); 1359 } 1360 done: 1361 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); 1362 irdma_rem_ref_cm_node(cm_node); 1363 } 1364 1365 if (settimer) { 1366 spin_lock_irqsave(&cm_core->ht_lock, flags); 1367 if (!timer_pending(&cm_core->tcp_timer)) { 1368 cm_core->tcp_timer.expires = nexttimeout; 1369 add_timer(&cm_core->tcp_timer); 1370 } 1371 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 1372 } 1373 } 1374 1375 /** 1376 * irdma_send_syn - send SYN packet 1377 * @cm_node: connection's node 1378 * @sendack: flag to set ACK bit or not 1379 */ 1380 int irdma_send_syn(struct irdma_cm_node *cm_node, u32 sendack) 1381 { 1382 struct irdma_puda_buf *sqbuf; 1383 int flags = SET_SYN; 1384 char optionsbuf[sizeof(struct option_mss) + 1385 sizeof(struct option_windowscale) + 1386 sizeof(struct option_base) + TCP_OPTIONS_PADDING]; 1387 struct irdma_kmem_info opts; 1388 int optionssize = 0; 1389 /* Sending MSS option */ 1390 union all_known_options *options; 1391 1392 opts.addr = optionsbuf; 1393 if (!cm_node) 1394 return -EINVAL; 1395 1396 options = (union all_known_options *)&optionsbuf[optionssize]; 1397 options->mss.optionnum = OPTION_NUM_MSS; 1398 options->mss.len = sizeof(struct option_mss); 1399 options->mss.mss = htons(cm_node->tcp_cntxt.mss); 1400 optionssize += sizeof(struct option_mss); 1401 1402 options = (union all_known_options *)&optionsbuf[optionssize]; 1403 options->windowscale.optionnum = OPTION_NUM_WINDOW_SCALE; 1404 options->windowscale.len = sizeof(struct option_windowscale); 1405 options->windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale; 1406 optionssize += sizeof(struct option_windowscale); 1407 options = (union all_known_options *)&optionsbuf[optionssize]; 1408 options->eol = OPTION_NUM_EOL; 1409 optionssize += 1; 1410 1411 if (sendack) 1412 flags |= SET_ACK; 1413 1414 opts.size = optionssize; 1415 1416 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, &opts, NULL, NULL, 1417 flags); 1418 if (!sqbuf) 1419 return -ENOMEM; 1420 1421 return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 1, 1422 0); 1423 } 1424 1425 /** 1426 * irdma_send_ack - Send ACK packet 1427 * @cm_node: connection's node 1428 */ 1429 void irdma_send_ack(struct irdma_cm_node *cm_node) 1430 { 1431 struct irdma_puda_buf *sqbuf; 1432 struct irdma_sc_vsi *vsi = &cm_node->iwdev->vsi; 1433 1434 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, NULL, NULL, 1435 SET_ACK); 1436 if (sqbuf) 1437 irdma_puda_send_buf(vsi->ilq, sqbuf); 1438 } 1439 1440 /** 1441 * irdma_send_fin - Send FIN pkt 1442 * @cm_node: connection's node 1443 */ 1444 static int irdma_send_fin(struct irdma_cm_node *cm_node) 1445 { 1446 struct irdma_puda_buf *sqbuf; 1447 1448 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, NULL, NULL, 1449 SET_ACK | SET_FIN); 1450 if (!sqbuf) 1451 return -ENOMEM; 1452 1453 return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 1, 1454 0); 1455 } 1456 1457 /** 1458 * irdma_find_listener - find a cm node listening on this addr-port pair 1459 * @cm_core: cm's core 1460 * @dst_addr: listener ip addr 1461 * @dst_port: listener tcp port num 1462 * @vlan_id: virtual LAN ID 1463 * @listener_state: state to match with listen node's 1464 */ 1465 static struct irdma_cm_listener * 1466 irdma_find_listener(struct irdma_cm_core *cm_core, u32 *dst_addr, u16 dst_port, 1467 u16 vlan_id, enum irdma_cm_listener_state listener_state) 1468 { 1469 struct irdma_cm_listener *listen_node; 1470 static const u32 ip_zero[4] = { 0, 0, 0, 0 }; 1471 u32 listen_addr[4]; 1472 u16 listen_port; 1473 unsigned long flags; 1474 1475 /* walk list and find cm_node associated with this session ID */ 1476 spin_lock_irqsave(&cm_core->listen_list_lock, flags); 1477 list_for_each_entry (listen_node, &cm_core->listen_list, list) { 1478 memcpy(listen_addr, listen_node->loc_addr, sizeof(listen_addr)); 1479 listen_port = listen_node->loc_port; 1480 if (listen_port != dst_port || 1481 !(listener_state & listen_node->listener_state)) 1482 continue; 1483 /* compare node pair, return node handle if a match */ 1484 if (!memcmp(listen_addr, ip_zero, sizeof(listen_addr)) || 1485 (!memcmp(listen_addr, dst_addr, sizeof(listen_addr)) && 1486 vlan_id == listen_node->vlan_id)) { 1487 refcount_inc(&listen_node->refcnt); 1488 spin_unlock_irqrestore(&cm_core->listen_list_lock, 1489 flags); 1490 trace_irdma_find_listener(listen_node); 1491 return listen_node; 1492 } 1493 } 1494 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); 1495 1496 return NULL; 1497 } 1498 1499 /** 1500 * irdma_del_multiple_qhash - Remove qhash and child listens 1501 * @iwdev: iWarp device 1502 * @cm_info: CM info for parent listen node 1503 * @cm_parent_listen_node: The parent listen node 1504 */ 1505 static int irdma_del_multiple_qhash(struct irdma_device *iwdev, 1506 struct irdma_cm_info *cm_info, 1507 struct irdma_cm_listener *cm_parent_listen_node) 1508 { 1509 struct irdma_cm_listener *child_listen_node; 1510 struct list_head *pos, *tpos; 1511 unsigned long flags; 1512 int ret = -EINVAL; 1513 1514 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags); 1515 list_for_each_safe (pos, tpos, 1516 &cm_parent_listen_node->child_listen_list) { 1517 child_listen_node = list_entry(pos, struct irdma_cm_listener, 1518 child_listen_list); 1519 if (child_listen_node->ipv4) 1520 ibdev_dbg(&iwdev->ibdev, 1521 "CM: removing child listen for IP=%pI4, port=%d, vlan=%d\n", 1522 child_listen_node->loc_addr, 1523 child_listen_node->loc_port, 1524 child_listen_node->vlan_id); 1525 else 1526 ibdev_dbg(&iwdev->ibdev, 1527 "CM: removing child listen for IP=%pI6, port=%d, vlan=%d\n", 1528 child_listen_node->loc_addr, 1529 child_listen_node->loc_port, 1530 child_listen_node->vlan_id); 1531 trace_irdma_del_multiple_qhash(child_listen_node); 1532 list_del(pos); 1533 memcpy(cm_info->loc_addr, child_listen_node->loc_addr, 1534 sizeof(cm_info->loc_addr)); 1535 cm_info->vlan_id = child_listen_node->vlan_id; 1536 if (child_listen_node->qhash_set) { 1537 ret = irdma_manage_qhash(iwdev, cm_info, 1538 IRDMA_QHASH_TYPE_TCP_SYN, 1539 IRDMA_QHASH_MANAGE_TYPE_DELETE, 1540 NULL, false); 1541 child_listen_node->qhash_set = false; 1542 } else { 1543 ret = 0; 1544 } 1545 ibdev_dbg(&iwdev->ibdev, 1546 "CM: Child listen node freed = %p\n", 1547 child_listen_node); 1548 kfree(child_listen_node); 1549 cm_parent_listen_node->cm_core->stats_listen_nodes_destroyed++; 1550 } 1551 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); 1552 1553 return ret; 1554 } 1555 1556 /** 1557 * irdma_netdev_vlan_ipv6 - Gets the netdev and mac 1558 * @addr: local IPv6 address 1559 * @vlan_id: vlan id for the given IPv6 address 1560 * @mac: mac address for the given IPv6 address 1561 * 1562 * Returns the net_device of the IPv6 address and also sets the 1563 * vlan id and mac for that address. 1564 */ 1565 struct net_device *irdma_netdev_vlan_ipv6(u32 *addr, u16 *vlan_id, u8 *mac) 1566 { 1567 struct net_device *ip_dev = NULL; 1568 struct in6_addr laddr6; 1569 1570 if (!IS_ENABLED(CONFIG_IPV6)) 1571 return NULL; 1572 1573 irdma_copy_ip_htonl(laddr6.in6_u.u6_addr32, addr); 1574 if (vlan_id) 1575 *vlan_id = 0xFFFF; /* Match rdma_vlan_dev_vlan_id() */ 1576 if (mac) 1577 eth_zero_addr(mac); 1578 1579 rcu_read_lock(); 1580 for_each_netdev_rcu (&init_net, ip_dev) { 1581 if (ipv6_chk_addr(&init_net, &laddr6, ip_dev, 1)) { 1582 if (vlan_id) 1583 *vlan_id = rdma_vlan_dev_vlan_id(ip_dev); 1584 if (ip_dev->dev_addr && mac) 1585 ether_addr_copy(mac, ip_dev->dev_addr); 1586 break; 1587 } 1588 } 1589 rcu_read_unlock(); 1590 1591 return ip_dev; 1592 } 1593 1594 /** 1595 * irdma_get_vlan_ipv4 - Returns the vlan_id for IPv4 address 1596 * @addr: local IPv4 address 1597 */ 1598 u16 irdma_get_vlan_ipv4(u32 *addr) 1599 { 1600 struct net_device *netdev; 1601 u16 vlan_id = 0xFFFF; 1602 1603 netdev = ip_dev_find(&init_net, htonl(addr[0])); 1604 if (netdev) { 1605 vlan_id = rdma_vlan_dev_vlan_id(netdev); 1606 dev_put(netdev); 1607 } 1608 1609 return vlan_id; 1610 } 1611 1612 /** 1613 * irdma_add_mqh_6 - Adds multiple qhashes for IPv6 1614 * @iwdev: iWarp device 1615 * @cm_info: CM info for parent listen node 1616 * @cm_parent_listen_node: The parent listen node 1617 * 1618 * Adds a qhash and a child listen node for every IPv6 address 1619 * on the adapter and adds the associated qhash filter 1620 */ 1621 static int irdma_add_mqh_6(struct irdma_device *iwdev, 1622 struct irdma_cm_info *cm_info, 1623 struct irdma_cm_listener *cm_parent_listen_node) 1624 { 1625 struct net_device *ip_dev; 1626 struct inet6_dev *idev; 1627 struct inet6_ifaddr *ifp, *tmp; 1628 struct irdma_cm_listener *child_listen_node; 1629 unsigned long flags; 1630 int ret = 0; 1631 1632 rtnl_lock(); 1633 for_each_netdev(&init_net, ip_dev) { 1634 if (!(ip_dev->flags & IFF_UP)) 1635 continue; 1636 1637 if (((rdma_vlan_dev_vlan_id(ip_dev) >= VLAN_N_VID) || 1638 (rdma_vlan_dev_real_dev(ip_dev) != iwdev->netdev)) && 1639 ip_dev != iwdev->netdev) 1640 continue; 1641 1642 idev = __in6_dev_get(ip_dev); 1643 if (!idev) { 1644 ibdev_dbg(&iwdev->ibdev, "CM: idev == NULL\n"); 1645 break; 1646 } 1647 list_for_each_entry_safe (ifp, tmp, &idev->addr_list, if_list) { 1648 ibdev_dbg(&iwdev->ibdev, "CM: IP=%pI6, vlan_id=%d, MAC=%pM\n", 1649 &ifp->addr, rdma_vlan_dev_vlan_id(ip_dev), 1650 ip_dev->dev_addr); 1651 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_KERNEL); 1652 ibdev_dbg(&iwdev->ibdev, "CM: Allocating child listener %p\n", 1653 child_listen_node); 1654 if (!child_listen_node) { 1655 ibdev_dbg(&iwdev->ibdev, "CM: listener memory allocation\n"); 1656 ret = -ENOMEM; 1657 goto exit; 1658 } 1659 1660 cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev); 1661 cm_parent_listen_node->vlan_id = cm_info->vlan_id; 1662 memcpy(child_listen_node, cm_parent_listen_node, 1663 sizeof(*child_listen_node)); 1664 irdma_copy_ip_ntohl(child_listen_node->loc_addr, 1665 ifp->addr.in6_u.u6_addr32); 1666 memcpy(cm_info->loc_addr, child_listen_node->loc_addr, 1667 sizeof(cm_info->loc_addr)); 1668 ret = irdma_manage_qhash(iwdev, cm_info, 1669 IRDMA_QHASH_TYPE_TCP_SYN, 1670 IRDMA_QHASH_MANAGE_TYPE_ADD, 1671 NULL, true); 1672 if (ret) { 1673 kfree(child_listen_node); 1674 continue; 1675 } 1676 1677 trace_irdma_add_mqh_6(iwdev, child_listen_node, 1678 ip_dev->dev_addr); 1679 1680 child_listen_node->qhash_set = true; 1681 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags); 1682 list_add(&child_listen_node->child_listen_list, 1683 &cm_parent_listen_node->child_listen_list); 1684 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); 1685 cm_parent_listen_node->cm_core->stats_listen_nodes_created++; 1686 } 1687 } 1688 exit: 1689 rtnl_unlock(); 1690 1691 return ret; 1692 } 1693 1694 /** 1695 * irdma_add_mqh_4 - Adds multiple qhashes for IPv4 1696 * @iwdev: iWarp device 1697 * @cm_info: CM info for parent listen node 1698 * @cm_parent_listen_node: The parent listen node 1699 * 1700 * Adds a qhash and a child listen node for every IPv4 address 1701 * on the adapter and adds the associated qhash filter 1702 */ 1703 static int irdma_add_mqh_4(struct irdma_device *iwdev, 1704 struct irdma_cm_info *cm_info, 1705 struct irdma_cm_listener *cm_parent_listen_node) 1706 { 1707 struct net_device *ip_dev; 1708 struct in_device *idev; 1709 struct irdma_cm_listener *child_listen_node; 1710 unsigned long flags; 1711 const struct in_ifaddr *ifa; 1712 int ret = 0; 1713 1714 rtnl_lock(); 1715 for_each_netdev(&init_net, ip_dev) { 1716 if (!(ip_dev->flags & IFF_UP)) 1717 continue; 1718 1719 if (((rdma_vlan_dev_vlan_id(ip_dev) >= VLAN_N_VID) || 1720 (rdma_vlan_dev_real_dev(ip_dev) != iwdev->netdev)) && 1721 ip_dev != iwdev->netdev) 1722 continue; 1723 1724 idev = in_dev_get(ip_dev); 1725 if (!idev) 1726 continue; 1727 1728 in_dev_for_each_ifa_rtnl(ifa, idev) { 1729 ibdev_dbg(&iwdev->ibdev, 1730 "CM: Allocating child CM Listener forIP=%pI4, vlan_id=%d, MAC=%pM\n", 1731 &ifa->ifa_address, rdma_vlan_dev_vlan_id(ip_dev), 1732 ip_dev->dev_addr); 1733 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_KERNEL); 1734 cm_parent_listen_node->cm_core->stats_listen_nodes_created++; 1735 ibdev_dbg(&iwdev->ibdev, "CM: Allocating child listener %p\n", 1736 child_listen_node); 1737 if (!child_listen_node) { 1738 ibdev_dbg(&iwdev->ibdev, "CM: listener memory allocation\n"); 1739 in_dev_put(idev); 1740 ret = -ENOMEM; 1741 goto exit; 1742 } 1743 1744 cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev); 1745 cm_parent_listen_node->vlan_id = cm_info->vlan_id; 1746 memcpy(child_listen_node, cm_parent_listen_node, 1747 sizeof(*child_listen_node)); 1748 child_listen_node->loc_addr[0] = 1749 ntohl(ifa->ifa_address); 1750 memcpy(cm_info->loc_addr, child_listen_node->loc_addr, 1751 sizeof(cm_info->loc_addr)); 1752 ret = irdma_manage_qhash(iwdev, cm_info, 1753 IRDMA_QHASH_TYPE_TCP_SYN, 1754 IRDMA_QHASH_MANAGE_TYPE_ADD, 1755 NULL, true); 1756 if (ret) { 1757 kfree(child_listen_node); 1758 cm_parent_listen_node->cm_core 1759 ->stats_listen_nodes_created--; 1760 continue; 1761 } 1762 1763 trace_irdma_add_mqh_4(iwdev, child_listen_node, 1764 ip_dev->dev_addr); 1765 1766 child_listen_node->qhash_set = true; 1767 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, 1768 flags); 1769 list_add(&child_listen_node->child_listen_list, 1770 &cm_parent_listen_node->child_listen_list); 1771 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); 1772 } 1773 in_dev_put(idev); 1774 } 1775 exit: 1776 rtnl_unlock(); 1777 1778 return ret; 1779 } 1780 1781 /** 1782 * irdma_add_mqh - Adds multiple qhashes 1783 * @iwdev: iWarp device 1784 * @cm_info: CM info for parent listen node 1785 * @cm_listen_node: The parent listen node 1786 */ 1787 static int irdma_add_mqh(struct irdma_device *iwdev, 1788 struct irdma_cm_info *cm_info, 1789 struct irdma_cm_listener *cm_listen_node) 1790 { 1791 if (cm_info->ipv4) 1792 return irdma_add_mqh_4(iwdev, cm_info, cm_listen_node); 1793 else 1794 return irdma_add_mqh_6(iwdev, cm_info, cm_listen_node); 1795 } 1796 1797 /** 1798 * irdma_reset_list_prep - add connection nodes slated for reset to list 1799 * @cm_core: cm's core 1800 * @listener: pointer to listener node 1801 * @reset_list: a list to which cm_node will be selected 1802 */ 1803 static void irdma_reset_list_prep(struct irdma_cm_core *cm_core, 1804 struct irdma_cm_listener *listener, 1805 struct list_head *reset_list) 1806 { 1807 struct irdma_cm_node *cm_node; 1808 int bkt; 1809 1810 hash_for_each_rcu(cm_core->cm_hash_tbl, bkt, cm_node, list) { 1811 if (cm_node->listener == listener && 1812 !cm_node->accelerated && 1813 refcount_inc_not_zero(&cm_node->refcnt)) 1814 list_add(&cm_node->reset_entry, reset_list); 1815 } 1816 } 1817 1818 /** 1819 * irdma_dec_refcnt_listen - delete listener and associated cm nodes 1820 * @cm_core: cm's core 1821 * @listener: pointer to listener node 1822 * @free_hanging_nodes: to free associated cm_nodes 1823 * @apbvt_del: flag to delete the apbvt 1824 */ 1825 static int irdma_dec_refcnt_listen(struct irdma_cm_core *cm_core, 1826 struct irdma_cm_listener *listener, 1827 int free_hanging_nodes, bool apbvt_del) 1828 { 1829 int err; 1830 struct list_head *list_pos; 1831 struct list_head *list_temp; 1832 struct irdma_cm_node *cm_node; 1833 struct list_head reset_list; 1834 struct irdma_cm_info nfo; 1835 enum irdma_cm_node_state old_state; 1836 unsigned long flags; 1837 1838 trace_irdma_dec_refcnt_listen(listener, __builtin_return_address(0)); 1839 /* free non-accelerated child nodes for this listener */ 1840 INIT_LIST_HEAD(&reset_list); 1841 if (free_hanging_nodes) { 1842 rcu_read_lock(); 1843 irdma_reset_list_prep(cm_core, listener, &reset_list); 1844 rcu_read_unlock(); 1845 } 1846 1847 list_for_each_safe (list_pos, list_temp, &reset_list) { 1848 cm_node = container_of(list_pos, struct irdma_cm_node, 1849 reset_entry); 1850 if (cm_node->state >= IRDMA_CM_STATE_FIN_WAIT1) { 1851 irdma_rem_ref_cm_node(cm_node); 1852 continue; 1853 } 1854 1855 irdma_cleanup_retrans_entry(cm_node); 1856 err = irdma_send_reset(cm_node); 1857 if (err) { 1858 cm_node->state = IRDMA_CM_STATE_CLOSED; 1859 ibdev_dbg(&cm_node->iwdev->ibdev, 1860 "CM: send reset failed\n"); 1861 } else { 1862 old_state = cm_node->state; 1863 cm_node->state = IRDMA_CM_STATE_LISTENER_DESTROYED; 1864 if (old_state != IRDMA_CM_STATE_MPAREQ_RCVD) 1865 irdma_rem_ref_cm_node(cm_node); 1866 } 1867 } 1868 1869 if (refcount_dec_and_test(&listener->refcnt)) { 1870 spin_lock_irqsave(&cm_core->listen_list_lock, flags); 1871 list_del(&listener->list); 1872 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); 1873 1874 if (apbvt_del) 1875 irdma_del_apbvt(listener->iwdev, 1876 listener->apbvt_entry); 1877 memcpy(nfo.loc_addr, listener->loc_addr, sizeof(nfo.loc_addr)); 1878 nfo.loc_port = listener->loc_port; 1879 nfo.ipv4 = listener->ipv4; 1880 nfo.vlan_id = listener->vlan_id; 1881 nfo.user_pri = listener->user_pri; 1882 nfo.qh_qpid = listener->iwdev->vsi.ilq->qp_id; 1883 1884 if (!list_empty(&listener->child_listen_list)) { 1885 irdma_del_multiple_qhash(listener->iwdev, &nfo, 1886 listener); 1887 } else { 1888 if (listener->qhash_set) 1889 irdma_manage_qhash(listener->iwdev, 1890 &nfo, 1891 IRDMA_QHASH_TYPE_TCP_SYN, 1892 IRDMA_QHASH_MANAGE_TYPE_DELETE, 1893 NULL, false); 1894 } 1895 1896 cm_core->stats_listen_destroyed++; 1897 cm_core->stats_listen_nodes_destroyed++; 1898 ibdev_dbg(&listener->iwdev->ibdev, 1899 "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", 1900 listener->loc_port, listener->loc_addr, listener, 1901 listener->cm_id, listener->qhash_set, 1902 listener->vlan_id, apbvt_del); 1903 kfree(listener); 1904 listener = NULL; 1905 return 0; 1906 } 1907 1908 return -EINVAL; 1909 } 1910 1911 /** 1912 * irdma_cm_del_listen - delete a listener 1913 * @cm_core: cm's core 1914 * @listener: passive connection's listener 1915 * @apbvt_del: flag to delete apbvt 1916 */ 1917 static int irdma_cm_del_listen(struct irdma_cm_core *cm_core, 1918 struct irdma_cm_listener *listener, 1919 bool apbvt_del) 1920 { 1921 listener->listener_state = IRDMA_CM_LISTENER_PASSIVE_STATE; 1922 listener->cm_id = NULL; 1923 1924 return irdma_dec_refcnt_listen(cm_core, listener, 1, apbvt_del); 1925 } 1926 1927 /** 1928 * irdma_addr_resolve_neigh - resolve neighbor address 1929 * @iwdev: iwarp device structure 1930 * @src_ip: local ip address 1931 * @dst_ip: remote ip address 1932 * @arpindex: if there is an arp entry 1933 */ 1934 static int irdma_addr_resolve_neigh(struct irdma_device *iwdev, u32 src_ip, 1935 u32 dst_ip, int arpindex) 1936 { 1937 struct rtable *rt; 1938 struct neighbour *neigh; 1939 int rc = arpindex; 1940 __be32 dst_ipaddr = htonl(dst_ip); 1941 __be32 src_ipaddr = htonl(src_ip); 1942 1943 rt = ip_route_output(&init_net, dst_ipaddr, src_ipaddr, 0, 0); 1944 if (IS_ERR(rt)) { 1945 ibdev_dbg(&iwdev->ibdev, "CM: ip_route_output fail\n"); 1946 return -EINVAL; 1947 } 1948 1949 neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr); 1950 if (!neigh) 1951 goto exit; 1952 1953 if (neigh->nud_state & NUD_VALID) 1954 rc = irdma_add_arp(iwdev->rf, &dst_ip, true, neigh->ha); 1955 else 1956 neigh_event_send(neigh, NULL); 1957 if (neigh) 1958 neigh_release(neigh); 1959 exit: 1960 ip_rt_put(rt); 1961 1962 return rc; 1963 } 1964 1965 /** 1966 * irdma_get_dst_ipv6 - get destination cache entry via ipv6 lookup 1967 * @src_addr: local ipv6 sock address 1968 * @dst_addr: destination ipv6 sock address 1969 */ 1970 static struct dst_entry *irdma_get_dst_ipv6(struct sockaddr_in6 *src_addr, 1971 struct sockaddr_in6 *dst_addr) 1972 { 1973 struct dst_entry *dst = NULL; 1974 1975 if ((IS_ENABLED(CONFIG_IPV6))) { 1976 struct flowi6 fl6 = {}; 1977 1978 fl6.daddr = dst_addr->sin6_addr; 1979 fl6.saddr = src_addr->sin6_addr; 1980 if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL) 1981 fl6.flowi6_oif = dst_addr->sin6_scope_id; 1982 1983 dst = ip6_route_output(&init_net, NULL, &fl6); 1984 } 1985 1986 return dst; 1987 } 1988 1989 /** 1990 * irdma_addr_resolve_neigh_ipv6 - resolve neighbor ipv6 address 1991 * @iwdev: iwarp device structure 1992 * @src: local ip address 1993 * @dest: remote ip address 1994 * @arpindex: if there is an arp entry 1995 */ 1996 static int irdma_addr_resolve_neigh_ipv6(struct irdma_device *iwdev, u32 *src, 1997 u32 *dest, int arpindex) 1998 { 1999 struct neighbour *neigh; 2000 int rc = arpindex; 2001 struct dst_entry *dst; 2002 struct sockaddr_in6 dst_addr = {}; 2003 struct sockaddr_in6 src_addr = {}; 2004 2005 dst_addr.sin6_family = AF_INET6; 2006 irdma_copy_ip_htonl(dst_addr.sin6_addr.in6_u.u6_addr32, dest); 2007 src_addr.sin6_family = AF_INET6; 2008 irdma_copy_ip_htonl(src_addr.sin6_addr.in6_u.u6_addr32, src); 2009 dst = irdma_get_dst_ipv6(&src_addr, &dst_addr); 2010 if (!dst || dst->error) { 2011 if (dst) { 2012 dst_release(dst); 2013 ibdev_dbg(&iwdev->ibdev, 2014 "CM: ip6_route_output returned dst->error = %d\n", 2015 dst->error); 2016 } 2017 return -EINVAL; 2018 } 2019 2020 neigh = dst_neigh_lookup(dst, dst_addr.sin6_addr.in6_u.u6_addr32); 2021 if (!neigh) 2022 goto exit; 2023 2024 ibdev_dbg(&iwdev->ibdev, "CM: dst_neigh_lookup MAC=%pM\n", 2025 neigh->ha); 2026 2027 trace_irdma_addr_resolve(iwdev, neigh->ha); 2028 2029 if (neigh->nud_state & NUD_VALID) 2030 rc = irdma_add_arp(iwdev->rf, dest, false, neigh->ha); 2031 else 2032 neigh_event_send(neigh, NULL); 2033 if (neigh) 2034 neigh_release(neigh); 2035 exit: 2036 dst_release(dst); 2037 2038 return rc; 2039 } 2040 2041 /** 2042 * irdma_find_node - find a cm node that matches the reference cm node 2043 * @cm_core: cm's core 2044 * @rem_port: remote tcp port num 2045 * @rem_addr: remote ip addr 2046 * @loc_port: local tcp port num 2047 * @loc_addr: local ip addr 2048 * @vlan_id: local VLAN ID 2049 */ 2050 struct irdma_cm_node *irdma_find_node(struct irdma_cm_core *cm_core, 2051 u16 rem_port, u32 *rem_addr, u16 loc_port, 2052 u32 *loc_addr, u16 vlan_id) 2053 { 2054 struct irdma_cm_node *cm_node; 2055 u32 key = (rem_port << 16) | loc_port; 2056 2057 rcu_read_lock(); 2058 hash_for_each_possible_rcu(cm_core->cm_hash_tbl, cm_node, list, key) { 2059 if (cm_node->vlan_id == vlan_id && 2060 cm_node->loc_port == loc_port && cm_node->rem_port == rem_port && 2061 !memcmp(cm_node->loc_addr, loc_addr, sizeof(cm_node->loc_addr)) && 2062 !memcmp(cm_node->rem_addr, rem_addr, sizeof(cm_node->rem_addr))) { 2063 if (!refcount_inc_not_zero(&cm_node->refcnt)) 2064 goto exit; 2065 rcu_read_unlock(); 2066 trace_irdma_find_node(cm_node, 0, NULL); 2067 return cm_node; 2068 } 2069 } 2070 2071 exit: 2072 rcu_read_unlock(); 2073 2074 /* no owner node */ 2075 return NULL; 2076 } 2077 2078 /** 2079 * irdma_add_hte_node - add a cm node to the hash table 2080 * @cm_core: cm's core 2081 * @cm_node: connection's node 2082 */ 2083 static void irdma_add_hte_node(struct irdma_cm_core *cm_core, 2084 struct irdma_cm_node *cm_node) 2085 { 2086 unsigned long flags; 2087 u32 key = (cm_node->rem_port << 16) | cm_node->loc_port; 2088 2089 spin_lock_irqsave(&cm_core->ht_lock, flags); 2090 hash_add_rcu(cm_core->cm_hash_tbl, &cm_node->list, key); 2091 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 2092 } 2093 2094 /** 2095 * irdma_ipv4_is_lpb - check if loopback 2096 * @loc_addr: local addr to compare 2097 * @rem_addr: remote address 2098 */ 2099 bool irdma_ipv4_is_lpb(u32 loc_addr, u32 rem_addr) 2100 { 2101 return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr); 2102 } 2103 2104 /** 2105 * irdma_ipv6_is_lpb - check if loopback 2106 * @loc_addr: local addr to compare 2107 * @rem_addr: remote address 2108 */ 2109 bool irdma_ipv6_is_lpb(u32 *loc_addr, u32 *rem_addr) 2110 { 2111 struct in6_addr raddr6; 2112 2113 irdma_copy_ip_htonl(raddr6.in6_u.u6_addr32, rem_addr); 2114 2115 return !memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6); 2116 } 2117 2118 /** 2119 * irdma_cm_create_ah - create a cm address handle 2120 * @cm_node: The connection manager node to create AH for 2121 * @wait: Provides option to wait for ah creation or not 2122 */ 2123 static int irdma_cm_create_ah(struct irdma_cm_node *cm_node, bool wait) 2124 { 2125 struct irdma_ah_info ah_info = {}; 2126 struct irdma_device *iwdev = cm_node->iwdev; 2127 2128 ether_addr_copy(ah_info.mac_addr, iwdev->netdev->dev_addr); 2129 2130 ah_info.hop_ttl = 0x40; 2131 ah_info.tc_tos = cm_node->tos; 2132 ah_info.vsi = &iwdev->vsi; 2133 2134 if (cm_node->ipv4) { 2135 ah_info.ipv4_valid = true; 2136 ah_info.dest_ip_addr[0] = cm_node->rem_addr[0]; 2137 ah_info.src_ip_addr[0] = cm_node->loc_addr[0]; 2138 ah_info.do_lpbk = irdma_ipv4_is_lpb(ah_info.src_ip_addr[0], 2139 ah_info.dest_ip_addr[0]); 2140 } else { 2141 memcpy(ah_info.dest_ip_addr, cm_node->rem_addr, 2142 sizeof(ah_info.dest_ip_addr)); 2143 memcpy(ah_info.src_ip_addr, cm_node->loc_addr, 2144 sizeof(ah_info.src_ip_addr)); 2145 ah_info.do_lpbk = irdma_ipv6_is_lpb(ah_info.src_ip_addr, 2146 ah_info.dest_ip_addr); 2147 } 2148 2149 ah_info.vlan_tag = cm_node->vlan_id; 2150 if (cm_node->vlan_id < VLAN_N_VID) { 2151 ah_info.insert_vlan_tag = 1; 2152 ah_info.vlan_tag |= cm_node->user_pri << VLAN_PRIO_SHIFT; 2153 } 2154 2155 ah_info.dst_arpindex = 2156 irdma_arp_table(iwdev->rf, ah_info.dest_ip_addr, 2157 ah_info.ipv4_valid, NULL, IRDMA_ARP_RESOLVE); 2158 2159 if (irdma_puda_create_ah(&iwdev->rf->sc_dev, &ah_info, wait, 2160 IRDMA_PUDA_RSRC_TYPE_ILQ, cm_node, 2161 &cm_node->ah)) 2162 return -ENOMEM; 2163 2164 trace_irdma_create_ah(cm_node); 2165 return 0; 2166 } 2167 2168 /** 2169 * irdma_cm_free_ah - free a cm address handle 2170 * @cm_node: The connection manager node to create AH for 2171 */ 2172 static void irdma_cm_free_ah(struct irdma_cm_node *cm_node) 2173 { 2174 struct irdma_device *iwdev = cm_node->iwdev; 2175 2176 trace_irdma_cm_free_ah(cm_node); 2177 irdma_puda_free_ah(&iwdev->rf->sc_dev, cm_node->ah); 2178 cm_node->ah = NULL; 2179 } 2180 2181 /** 2182 * irdma_make_cm_node - create a new instance of a cm node 2183 * @cm_core: cm's core 2184 * @iwdev: iwarp device structure 2185 * @cm_info: quad info for connection 2186 * @listener: passive connection's listener 2187 */ 2188 static struct irdma_cm_node * 2189 irdma_make_cm_node(struct irdma_cm_core *cm_core, struct irdma_device *iwdev, 2190 struct irdma_cm_info *cm_info, 2191 struct irdma_cm_listener *listener) 2192 { 2193 struct irdma_cm_node *cm_node; 2194 int oldarpindex; 2195 int arpindex; 2196 struct net_device *netdev = iwdev->netdev; 2197 2198 /* create an hte and cm_node for this instance */ 2199 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC); 2200 if (!cm_node) 2201 return NULL; 2202 2203 /* set our node specific transport info */ 2204 cm_node->ipv4 = cm_info->ipv4; 2205 cm_node->vlan_id = cm_info->vlan_id; 2206 if (cm_node->vlan_id >= VLAN_N_VID && iwdev->dcb_vlan_mode) 2207 cm_node->vlan_id = 0; 2208 cm_node->tos = cm_info->tos; 2209 cm_node->user_pri = cm_info->user_pri; 2210 if (listener) { 2211 if (listener->tos != cm_info->tos) 2212 ibdev_warn(&iwdev->ibdev, 2213 "application TOS[%d] and remote client TOS[%d] mismatch\n", 2214 listener->tos, cm_info->tos); 2215 if (iwdev->vsi.dscp_mode) { 2216 cm_node->user_pri = listener->user_pri; 2217 } else { 2218 cm_node->tos = max(listener->tos, cm_info->tos); 2219 cm_node->user_pri = rt_tos2priority(cm_node->tos); 2220 } 2221 ibdev_dbg(&iwdev->ibdev, 2222 "DCB: listener: TOS:[%d] UP:[%d]\n", cm_node->tos, 2223 cm_node->user_pri); 2224 trace_irdma_listener_tos(iwdev, cm_node->tos, 2225 cm_node->user_pri); 2226 } 2227 memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr)); 2228 memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr)); 2229 cm_node->loc_port = cm_info->loc_port; 2230 cm_node->rem_port = cm_info->rem_port; 2231 2232 cm_node->mpa_frame_rev = IRDMA_CM_DEFAULT_MPA_VER; 2233 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO; 2234 cm_node->iwdev = iwdev; 2235 cm_node->dev = &iwdev->rf->sc_dev; 2236 2237 cm_node->ird_size = cm_node->dev->hw_attrs.max_hw_ird; 2238 cm_node->ord_size = cm_node->dev->hw_attrs.max_hw_ord; 2239 2240 cm_node->listener = listener; 2241 cm_node->cm_id = cm_info->cm_id; 2242 ether_addr_copy(cm_node->loc_mac, netdev->dev_addr); 2243 spin_lock_init(&cm_node->retrans_list_lock); 2244 cm_node->ack_rcvd = false; 2245 2246 init_completion(&cm_node->establish_comp); 2247 refcount_set(&cm_node->refcnt, 1); 2248 /* associate our parent CM core */ 2249 cm_node->cm_core = cm_core; 2250 cm_node->tcp_cntxt.loc_id = IRDMA_CM_DEFAULT_LOCAL_ID; 2251 cm_node->tcp_cntxt.rcv_wscale = iwdev->rcv_wscale; 2252 cm_node->tcp_cntxt.rcv_wnd = iwdev->rcv_wnd >> cm_node->tcp_cntxt.rcv_wscale; 2253 if (cm_node->ipv4) { 2254 cm_node->tcp_cntxt.loc_seq_num = secure_tcp_seq(htonl(cm_node->loc_addr[0]), 2255 htonl(cm_node->rem_addr[0]), 2256 htons(cm_node->loc_port), 2257 htons(cm_node->rem_port)); 2258 cm_node->tcp_cntxt.mss = iwdev->vsi.mtu - IRDMA_MTU_TO_MSS_IPV4; 2259 } else if (IS_ENABLED(CONFIG_IPV6)) { 2260 __be32 loc[4] = { 2261 htonl(cm_node->loc_addr[0]), htonl(cm_node->loc_addr[1]), 2262 htonl(cm_node->loc_addr[2]), htonl(cm_node->loc_addr[3]) 2263 }; 2264 __be32 rem[4] = { 2265 htonl(cm_node->rem_addr[0]), htonl(cm_node->rem_addr[1]), 2266 htonl(cm_node->rem_addr[2]), htonl(cm_node->rem_addr[3]) 2267 }; 2268 cm_node->tcp_cntxt.loc_seq_num = secure_tcpv6_seq(loc, rem, 2269 htons(cm_node->loc_port), 2270 htons(cm_node->rem_port)); 2271 cm_node->tcp_cntxt.mss = iwdev->vsi.mtu - IRDMA_MTU_TO_MSS_IPV6; 2272 } 2273 2274 if ((cm_node->ipv4 && 2275 irdma_ipv4_is_lpb(cm_node->loc_addr[0], cm_node->rem_addr[0])) || 2276 (!cm_node->ipv4 && 2277 irdma_ipv6_is_lpb(cm_node->loc_addr, cm_node->rem_addr))) { 2278 cm_node->do_lpb = true; 2279 arpindex = irdma_arp_table(iwdev->rf, cm_node->rem_addr, 2280 cm_node->ipv4, NULL, 2281 IRDMA_ARP_RESOLVE); 2282 } else { 2283 oldarpindex = irdma_arp_table(iwdev->rf, cm_node->rem_addr, 2284 cm_node->ipv4, NULL, 2285 IRDMA_ARP_RESOLVE); 2286 if (cm_node->ipv4) 2287 arpindex = irdma_addr_resolve_neigh(iwdev, 2288 cm_info->loc_addr[0], 2289 cm_info->rem_addr[0], 2290 oldarpindex); 2291 else if (IS_ENABLED(CONFIG_IPV6)) 2292 arpindex = irdma_addr_resolve_neigh_ipv6(iwdev, 2293 cm_info->loc_addr, 2294 cm_info->rem_addr, 2295 oldarpindex); 2296 else 2297 arpindex = -EINVAL; 2298 } 2299 2300 if (arpindex < 0) 2301 goto err; 2302 2303 ether_addr_copy(cm_node->rem_mac, 2304 iwdev->rf->arp_table[arpindex].mac_addr); 2305 irdma_add_hte_node(cm_core, cm_node); 2306 cm_core->stats_nodes_created++; 2307 return cm_node; 2308 2309 err: 2310 kfree(cm_node); 2311 2312 return NULL; 2313 } 2314 2315 static void irdma_destroy_connection(struct irdma_cm_node *cm_node) 2316 { 2317 struct irdma_cm_core *cm_core = cm_node->cm_core; 2318 struct irdma_qp *iwqp; 2319 struct irdma_cm_info nfo; 2320 2321 /* if the node is destroyed before connection was accelerated */ 2322 if (!cm_node->accelerated && cm_node->accept_pend) { 2323 ibdev_dbg(&cm_node->iwdev->ibdev, 2324 "CM: node destroyed before established\n"); 2325 atomic_dec(&cm_node->listener->pend_accepts_cnt); 2326 } 2327 if (cm_node->close_entry) 2328 irdma_handle_close_entry(cm_node, 0); 2329 if (cm_node->listener) { 2330 irdma_dec_refcnt_listen(cm_core, cm_node->listener, 0, true); 2331 } else { 2332 if (cm_node->apbvt_set) { 2333 irdma_del_apbvt(cm_node->iwdev, cm_node->apbvt_entry); 2334 cm_node->apbvt_set = 0; 2335 } 2336 irdma_get_addr_info(cm_node, &nfo); 2337 if (cm_node->qhash_set) { 2338 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id; 2339 irdma_manage_qhash(cm_node->iwdev, &nfo, 2340 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 2341 IRDMA_QHASH_MANAGE_TYPE_DELETE, NULL, 2342 false); 2343 cm_node->qhash_set = 0; 2344 } 2345 } 2346 2347 iwqp = cm_node->iwqp; 2348 if (iwqp) { 2349 cm_node->cm_id->rem_ref(cm_node->cm_id); 2350 cm_node->cm_id = NULL; 2351 iwqp->cm_id = NULL; 2352 irdma_qp_rem_ref(&iwqp->ibqp); 2353 cm_node->iwqp = NULL; 2354 } else if (cm_node->qhash_set) { 2355 irdma_get_addr_info(cm_node, &nfo); 2356 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id; 2357 irdma_manage_qhash(cm_node->iwdev, &nfo, 2358 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 2359 IRDMA_QHASH_MANAGE_TYPE_DELETE, NULL, false); 2360 cm_node->qhash_set = 0; 2361 } 2362 2363 cm_core->cm_free_ah(cm_node); 2364 } 2365 2366 /** 2367 * irdma_rem_ref_cm_node - destroy an instance of a cm node 2368 * @cm_node: connection's node 2369 */ 2370 void irdma_rem_ref_cm_node(struct irdma_cm_node *cm_node) 2371 { 2372 struct irdma_cm_core *cm_core = cm_node->cm_core; 2373 unsigned long flags; 2374 2375 trace_irdma_rem_ref_cm_node(cm_node, 0, __builtin_return_address(0)); 2376 spin_lock_irqsave(&cm_core->ht_lock, flags); 2377 2378 if (!refcount_dec_and_test(&cm_node->refcnt)) { 2379 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 2380 return; 2381 } 2382 if (cm_node->iwqp) { 2383 cm_node->iwqp->cm_node = NULL; 2384 cm_node->iwqp->cm_id = NULL; 2385 } 2386 hash_del_rcu(&cm_node->list); 2387 cm_node->cm_core->stats_nodes_destroyed++; 2388 2389 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 2390 2391 irdma_destroy_connection(cm_node); 2392 2393 kfree_rcu(cm_node, rcu_head); 2394 } 2395 2396 /** 2397 * irdma_handle_fin_pkt - FIN packet received 2398 * @cm_node: connection's node 2399 */ 2400 static void irdma_handle_fin_pkt(struct irdma_cm_node *cm_node) 2401 { 2402 switch (cm_node->state) { 2403 case IRDMA_CM_STATE_SYN_RCVD: 2404 case IRDMA_CM_STATE_SYN_SENT: 2405 case IRDMA_CM_STATE_ESTABLISHED: 2406 case IRDMA_CM_STATE_MPAREJ_RCVD: 2407 cm_node->tcp_cntxt.rcv_nxt++; 2408 irdma_cleanup_retrans_entry(cm_node); 2409 cm_node->state = IRDMA_CM_STATE_LAST_ACK; 2410 irdma_send_fin(cm_node); 2411 break; 2412 case IRDMA_CM_STATE_MPAREQ_SENT: 2413 irdma_create_event(cm_node, IRDMA_CM_EVENT_ABORTED); 2414 cm_node->tcp_cntxt.rcv_nxt++; 2415 irdma_cleanup_retrans_entry(cm_node); 2416 cm_node->state = IRDMA_CM_STATE_CLOSED; 2417 refcount_inc(&cm_node->refcnt); 2418 irdma_send_reset(cm_node); 2419 break; 2420 case IRDMA_CM_STATE_FIN_WAIT1: 2421 cm_node->tcp_cntxt.rcv_nxt++; 2422 irdma_cleanup_retrans_entry(cm_node); 2423 cm_node->state = IRDMA_CM_STATE_CLOSING; 2424 irdma_send_ack(cm_node); 2425 /* 2426 * Wait for ACK as this is simultaneous close. 2427 * After we receive ACK, do not send anything. 2428 * Just rm the node. 2429 */ 2430 break; 2431 case IRDMA_CM_STATE_FIN_WAIT2: 2432 cm_node->tcp_cntxt.rcv_nxt++; 2433 irdma_cleanup_retrans_entry(cm_node); 2434 cm_node->state = IRDMA_CM_STATE_TIME_WAIT; 2435 irdma_send_ack(cm_node); 2436 irdma_schedule_cm_timer(cm_node, NULL, IRDMA_TIMER_TYPE_CLOSE, 2437 1, 0); 2438 break; 2439 case IRDMA_CM_STATE_TIME_WAIT: 2440 cm_node->tcp_cntxt.rcv_nxt++; 2441 irdma_cleanup_retrans_entry(cm_node); 2442 cm_node->state = IRDMA_CM_STATE_CLOSED; 2443 irdma_rem_ref_cm_node(cm_node); 2444 break; 2445 case IRDMA_CM_STATE_OFFLOADED: 2446 default: 2447 ibdev_dbg(&cm_node->iwdev->ibdev, 2448 "CM: bad state node state = %d\n", cm_node->state); 2449 break; 2450 } 2451 } 2452 2453 /** 2454 * irdma_handle_rst_pkt - process received RST packet 2455 * @cm_node: connection's node 2456 * @rbuf: receive buffer 2457 */ 2458 static void irdma_handle_rst_pkt(struct irdma_cm_node *cm_node, 2459 struct irdma_puda_buf *rbuf) 2460 { 2461 ibdev_dbg(&cm_node->iwdev->ibdev, 2462 "CM: caller: %pS cm_node=%p state=%d rem_port=0x%04x loc_port=0x%04x rem_addr=%pI4 loc_addr=%pI4\n", 2463 __builtin_return_address(0), cm_node, cm_node->state, 2464 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr, 2465 cm_node->loc_addr); 2466 2467 irdma_cleanup_retrans_entry(cm_node); 2468 switch (cm_node->state) { 2469 case IRDMA_CM_STATE_SYN_SENT: 2470 case IRDMA_CM_STATE_MPAREQ_SENT: 2471 switch (cm_node->mpa_frame_rev) { 2472 case IETF_MPA_V2: 2473 /* Drop down to MPA_V1*/ 2474 cm_node->mpa_frame_rev = IETF_MPA_V1; 2475 /* send a syn and goto syn sent state */ 2476 cm_node->state = IRDMA_CM_STATE_SYN_SENT; 2477 if (irdma_send_syn(cm_node, 0)) 2478 irdma_active_open_err(cm_node, false); 2479 break; 2480 case IETF_MPA_V1: 2481 default: 2482 irdma_active_open_err(cm_node, false); 2483 break; 2484 } 2485 break; 2486 case IRDMA_CM_STATE_MPAREQ_RCVD: 2487 atomic_inc(&cm_node->passive_state); 2488 break; 2489 case IRDMA_CM_STATE_ESTABLISHED: 2490 case IRDMA_CM_STATE_SYN_RCVD: 2491 case IRDMA_CM_STATE_LISTENING: 2492 irdma_passive_open_err(cm_node, false); 2493 break; 2494 case IRDMA_CM_STATE_OFFLOADED: 2495 irdma_active_open_err(cm_node, false); 2496 break; 2497 case IRDMA_CM_STATE_CLOSED: 2498 break; 2499 case IRDMA_CM_STATE_FIN_WAIT2: 2500 case IRDMA_CM_STATE_FIN_WAIT1: 2501 case IRDMA_CM_STATE_LAST_ACK: 2502 case IRDMA_CM_STATE_TIME_WAIT: 2503 cm_node->state = IRDMA_CM_STATE_CLOSED; 2504 irdma_rem_ref_cm_node(cm_node); 2505 break; 2506 default: 2507 break; 2508 } 2509 } 2510 2511 /** 2512 * irdma_handle_rcv_mpa - Process a recv'd mpa buffer 2513 * @cm_node: connection's node 2514 * @rbuf: receive buffer 2515 */ 2516 static void irdma_handle_rcv_mpa(struct irdma_cm_node *cm_node, 2517 struct irdma_puda_buf *rbuf) 2518 { 2519 int err; 2520 int datasize = rbuf->datalen; 2521 u8 *dataloc = rbuf->data; 2522 2523 enum irdma_cm_event_type type = IRDMA_CM_EVENT_UNKNOWN; 2524 u32 res_type; 2525 2526 err = irdma_parse_mpa(cm_node, dataloc, &res_type, datasize); 2527 if (err) { 2528 if (cm_node->state == IRDMA_CM_STATE_MPAREQ_SENT) 2529 irdma_active_open_err(cm_node, true); 2530 else 2531 irdma_passive_open_err(cm_node, true); 2532 return; 2533 } 2534 2535 switch (cm_node->state) { 2536 case IRDMA_CM_STATE_ESTABLISHED: 2537 if (res_type == IRDMA_MPA_REQUEST_REJECT) 2538 ibdev_dbg(&cm_node->iwdev->ibdev, 2539 "CM: state for reject\n"); 2540 cm_node->state = IRDMA_CM_STATE_MPAREQ_RCVD; 2541 type = IRDMA_CM_EVENT_MPA_REQ; 2542 irdma_send_ack(cm_node); /* ACK received MPA request */ 2543 atomic_set(&cm_node->passive_state, 2544 IRDMA_PASSIVE_STATE_INDICATED); 2545 break; 2546 case IRDMA_CM_STATE_MPAREQ_SENT: 2547 irdma_cleanup_retrans_entry(cm_node); 2548 if (res_type == IRDMA_MPA_REQUEST_REJECT) { 2549 type = IRDMA_CM_EVENT_MPA_REJECT; 2550 cm_node->state = IRDMA_CM_STATE_MPAREJ_RCVD; 2551 } else { 2552 type = IRDMA_CM_EVENT_CONNECTED; 2553 cm_node->state = IRDMA_CM_STATE_OFFLOADED; 2554 } 2555 irdma_send_ack(cm_node); 2556 break; 2557 default: 2558 ibdev_dbg(&cm_node->iwdev->ibdev, 2559 "CM: wrong cm_node state =%d\n", cm_node->state); 2560 break; 2561 } 2562 irdma_create_event(cm_node, type); 2563 } 2564 2565 /** 2566 * irdma_check_syn - Check for error on received syn ack 2567 * @cm_node: connection's node 2568 * @tcph: pointer tcp header 2569 */ 2570 static int irdma_check_syn(struct irdma_cm_node *cm_node, struct tcphdr *tcph) 2571 { 2572 if (ntohl(tcph->ack_seq) != cm_node->tcp_cntxt.loc_seq_num) { 2573 irdma_active_open_err(cm_node, true); 2574 return 1; 2575 } 2576 2577 return 0; 2578 } 2579 2580 /** 2581 * irdma_check_seq - check seq numbers if OK 2582 * @cm_node: connection's node 2583 * @tcph: pointer tcp header 2584 */ 2585 static int irdma_check_seq(struct irdma_cm_node *cm_node, struct tcphdr *tcph) 2586 { 2587 u32 seq; 2588 u32 ack_seq; 2589 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num; 2590 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt; 2591 u32 rcv_wnd; 2592 int err = 0; 2593 2594 seq = ntohl(tcph->seq); 2595 ack_seq = ntohl(tcph->ack_seq); 2596 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd; 2597 if (ack_seq != loc_seq_num || 2598 !between(seq, rcv_nxt, (rcv_nxt + rcv_wnd))) 2599 err = -1; 2600 if (err) 2601 ibdev_dbg(&cm_node->iwdev->ibdev, 2602 "CM: seq number err\n"); 2603 2604 return err; 2605 } 2606 2607 void irdma_add_conn_est_qh(struct irdma_cm_node *cm_node) 2608 { 2609 struct irdma_cm_info nfo; 2610 2611 irdma_get_addr_info(cm_node, &nfo); 2612 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id; 2613 irdma_manage_qhash(cm_node->iwdev, &nfo, 2614 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 2615 IRDMA_QHASH_MANAGE_TYPE_ADD, 2616 cm_node, false); 2617 cm_node->qhash_set = true; 2618 } 2619 2620 /** 2621 * irdma_handle_syn_pkt - is for Passive node 2622 * @cm_node: connection's node 2623 * @rbuf: receive buffer 2624 */ 2625 static void irdma_handle_syn_pkt(struct irdma_cm_node *cm_node, 2626 struct irdma_puda_buf *rbuf) 2627 { 2628 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2629 int err; 2630 u32 inc_sequence; 2631 int optionsize; 2632 2633 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); 2634 inc_sequence = ntohl(tcph->seq); 2635 2636 switch (cm_node->state) { 2637 case IRDMA_CM_STATE_SYN_SENT: 2638 case IRDMA_CM_STATE_MPAREQ_SENT: 2639 /* Rcvd syn on active open connection */ 2640 irdma_active_open_err(cm_node, 1); 2641 break; 2642 case IRDMA_CM_STATE_LISTENING: 2643 /* Passive OPEN */ 2644 if (atomic_read(&cm_node->listener->pend_accepts_cnt) > 2645 cm_node->listener->backlog) { 2646 cm_node->cm_core->stats_backlog_drops++; 2647 irdma_passive_open_err(cm_node, false); 2648 break; 2649 } 2650 err = irdma_handle_tcp_options(cm_node, tcph, optionsize, 1); 2651 if (err) { 2652 irdma_passive_open_err(cm_node, false); 2653 /* drop pkt */ 2654 break; 2655 } 2656 err = cm_node->cm_core->cm_create_ah(cm_node, false); 2657 if (err) { 2658 irdma_passive_open_err(cm_node, false); 2659 /* drop pkt */ 2660 break; 2661 } 2662 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; 2663 cm_node->accept_pend = 1; 2664 atomic_inc(&cm_node->listener->pend_accepts_cnt); 2665 2666 cm_node->state = IRDMA_CM_STATE_SYN_RCVD; 2667 break; 2668 case IRDMA_CM_STATE_CLOSED: 2669 irdma_cleanup_retrans_entry(cm_node); 2670 refcount_inc(&cm_node->refcnt); 2671 irdma_send_reset(cm_node); 2672 break; 2673 case IRDMA_CM_STATE_OFFLOADED: 2674 case IRDMA_CM_STATE_ESTABLISHED: 2675 case IRDMA_CM_STATE_FIN_WAIT1: 2676 case IRDMA_CM_STATE_FIN_WAIT2: 2677 case IRDMA_CM_STATE_MPAREQ_RCVD: 2678 case IRDMA_CM_STATE_LAST_ACK: 2679 case IRDMA_CM_STATE_CLOSING: 2680 case IRDMA_CM_STATE_UNKNOWN: 2681 default: 2682 break; 2683 } 2684 } 2685 2686 /** 2687 * irdma_handle_synack_pkt - Process SYN+ACK packet (active side) 2688 * @cm_node: connection's node 2689 * @rbuf: receive buffer 2690 */ 2691 static void irdma_handle_synack_pkt(struct irdma_cm_node *cm_node, 2692 struct irdma_puda_buf *rbuf) 2693 { 2694 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2695 int err; 2696 u32 inc_sequence; 2697 int optionsize; 2698 2699 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); 2700 inc_sequence = ntohl(tcph->seq); 2701 switch (cm_node->state) { 2702 case IRDMA_CM_STATE_SYN_SENT: 2703 irdma_cleanup_retrans_entry(cm_node); 2704 /* active open */ 2705 if (irdma_check_syn(cm_node, tcph)) { 2706 ibdev_dbg(&cm_node->iwdev->ibdev, 2707 "CM: check syn fail\n"); 2708 return; 2709 } 2710 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); 2711 /* setup options */ 2712 err = irdma_handle_tcp_options(cm_node, tcph, optionsize, 0); 2713 if (err) { 2714 ibdev_dbg(&cm_node->iwdev->ibdev, 2715 "CM: cm_node=%p tcp_options failed\n", 2716 cm_node); 2717 break; 2718 } 2719 irdma_cleanup_retrans_entry(cm_node); 2720 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; 2721 irdma_send_ack(cm_node); /* ACK for the syn_ack */ 2722 err = irdma_send_mpa_request(cm_node); 2723 if (err) { 2724 ibdev_dbg(&cm_node->iwdev->ibdev, 2725 "CM: cm_node=%p irdma_send_mpa_request failed\n", 2726 cm_node); 2727 break; 2728 } 2729 cm_node->state = IRDMA_CM_STATE_MPAREQ_SENT; 2730 break; 2731 case IRDMA_CM_STATE_MPAREQ_RCVD: 2732 irdma_passive_open_err(cm_node, true); 2733 break; 2734 case IRDMA_CM_STATE_LISTENING: 2735 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq); 2736 irdma_cleanup_retrans_entry(cm_node); 2737 cm_node->state = IRDMA_CM_STATE_CLOSED; 2738 irdma_send_reset(cm_node); 2739 break; 2740 case IRDMA_CM_STATE_CLOSED: 2741 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq); 2742 irdma_cleanup_retrans_entry(cm_node); 2743 refcount_inc(&cm_node->refcnt); 2744 irdma_send_reset(cm_node); 2745 break; 2746 case IRDMA_CM_STATE_ESTABLISHED: 2747 case IRDMA_CM_STATE_FIN_WAIT1: 2748 case IRDMA_CM_STATE_FIN_WAIT2: 2749 case IRDMA_CM_STATE_LAST_ACK: 2750 case IRDMA_CM_STATE_OFFLOADED: 2751 case IRDMA_CM_STATE_CLOSING: 2752 case IRDMA_CM_STATE_UNKNOWN: 2753 case IRDMA_CM_STATE_MPAREQ_SENT: 2754 default: 2755 break; 2756 } 2757 } 2758 2759 /** 2760 * irdma_handle_ack_pkt - process packet with ACK 2761 * @cm_node: connection's node 2762 * @rbuf: receive buffer 2763 */ 2764 static int irdma_handle_ack_pkt(struct irdma_cm_node *cm_node, 2765 struct irdma_puda_buf *rbuf) 2766 { 2767 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2768 u32 inc_sequence; 2769 int ret; 2770 int optionsize; 2771 u32 datasize = rbuf->datalen; 2772 2773 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); 2774 2775 if (irdma_check_seq(cm_node, tcph)) 2776 return -EINVAL; 2777 2778 inc_sequence = ntohl(tcph->seq); 2779 switch (cm_node->state) { 2780 case IRDMA_CM_STATE_SYN_RCVD: 2781 irdma_cleanup_retrans_entry(cm_node); 2782 ret = irdma_handle_tcp_options(cm_node, tcph, optionsize, 1); 2783 if (ret) 2784 return ret; 2785 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); 2786 cm_node->state = IRDMA_CM_STATE_ESTABLISHED; 2787 if (datasize) { 2788 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; 2789 irdma_handle_rcv_mpa(cm_node, rbuf); 2790 } 2791 break; 2792 case IRDMA_CM_STATE_ESTABLISHED: 2793 irdma_cleanup_retrans_entry(cm_node); 2794 if (datasize) { 2795 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; 2796 irdma_handle_rcv_mpa(cm_node, rbuf); 2797 } 2798 break; 2799 case IRDMA_CM_STATE_MPAREQ_SENT: 2800 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); 2801 if (datasize) { 2802 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; 2803 cm_node->ack_rcvd = false; 2804 irdma_handle_rcv_mpa(cm_node, rbuf); 2805 } else { 2806 cm_node->ack_rcvd = true; 2807 } 2808 break; 2809 case IRDMA_CM_STATE_LISTENING: 2810 irdma_cleanup_retrans_entry(cm_node); 2811 cm_node->state = IRDMA_CM_STATE_CLOSED; 2812 irdma_send_reset(cm_node); 2813 break; 2814 case IRDMA_CM_STATE_CLOSED: 2815 irdma_cleanup_retrans_entry(cm_node); 2816 refcount_inc(&cm_node->refcnt); 2817 irdma_send_reset(cm_node); 2818 break; 2819 case IRDMA_CM_STATE_LAST_ACK: 2820 case IRDMA_CM_STATE_CLOSING: 2821 irdma_cleanup_retrans_entry(cm_node); 2822 cm_node->state = IRDMA_CM_STATE_CLOSED; 2823 irdma_rem_ref_cm_node(cm_node); 2824 break; 2825 case IRDMA_CM_STATE_FIN_WAIT1: 2826 irdma_cleanup_retrans_entry(cm_node); 2827 cm_node->state = IRDMA_CM_STATE_FIN_WAIT2; 2828 break; 2829 case IRDMA_CM_STATE_SYN_SENT: 2830 case IRDMA_CM_STATE_FIN_WAIT2: 2831 case IRDMA_CM_STATE_OFFLOADED: 2832 case IRDMA_CM_STATE_MPAREQ_RCVD: 2833 case IRDMA_CM_STATE_UNKNOWN: 2834 default: 2835 irdma_cleanup_retrans_entry(cm_node); 2836 break; 2837 } 2838 2839 return 0; 2840 } 2841 2842 /** 2843 * irdma_process_pkt - process cm packet 2844 * @cm_node: connection's node 2845 * @rbuf: receive buffer 2846 */ 2847 static void irdma_process_pkt(struct irdma_cm_node *cm_node, 2848 struct irdma_puda_buf *rbuf) 2849 { 2850 enum irdma_tcpip_pkt_type pkt_type = IRDMA_PKT_TYPE_UNKNOWN; 2851 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2852 u32 fin_set = 0; 2853 int err; 2854 2855 if (tcph->rst) { 2856 pkt_type = IRDMA_PKT_TYPE_RST; 2857 } else if (tcph->syn) { 2858 pkt_type = IRDMA_PKT_TYPE_SYN; 2859 if (tcph->ack) 2860 pkt_type = IRDMA_PKT_TYPE_SYNACK; 2861 } else if (tcph->ack) { 2862 pkt_type = IRDMA_PKT_TYPE_ACK; 2863 } 2864 if (tcph->fin) 2865 fin_set = 1; 2866 2867 switch (pkt_type) { 2868 case IRDMA_PKT_TYPE_SYN: 2869 irdma_handle_syn_pkt(cm_node, rbuf); 2870 break; 2871 case IRDMA_PKT_TYPE_SYNACK: 2872 irdma_handle_synack_pkt(cm_node, rbuf); 2873 break; 2874 case IRDMA_PKT_TYPE_ACK: 2875 err = irdma_handle_ack_pkt(cm_node, rbuf); 2876 if (fin_set && !err) 2877 irdma_handle_fin_pkt(cm_node); 2878 break; 2879 case IRDMA_PKT_TYPE_RST: 2880 irdma_handle_rst_pkt(cm_node, rbuf); 2881 break; 2882 default: 2883 if (fin_set && 2884 (!irdma_check_seq(cm_node, (struct tcphdr *)rbuf->tcph))) 2885 irdma_handle_fin_pkt(cm_node); 2886 break; 2887 } 2888 } 2889 2890 /** 2891 * irdma_make_listen_node - create a listen node with params 2892 * @cm_core: cm's core 2893 * @iwdev: iwarp device structure 2894 * @cm_info: quad info for connection 2895 */ 2896 static struct irdma_cm_listener * 2897 irdma_make_listen_node(struct irdma_cm_core *cm_core, 2898 struct irdma_device *iwdev, 2899 struct irdma_cm_info *cm_info) 2900 { 2901 struct irdma_cm_listener *listener; 2902 unsigned long flags; 2903 2904 /* cannot have multiple matching listeners */ 2905 listener = irdma_find_listener(cm_core, cm_info->loc_addr, 2906 cm_info->loc_port, cm_info->vlan_id, 2907 IRDMA_CM_LISTENER_EITHER_STATE); 2908 if (listener && 2909 listener->listener_state == IRDMA_CM_LISTENER_ACTIVE_STATE) { 2910 refcount_dec(&listener->refcnt); 2911 return NULL; 2912 } 2913 2914 if (!listener) { 2915 /* create a CM listen node 2916 * 1/2 node to compare incoming traffic to 2917 */ 2918 listener = kzalloc(sizeof(*listener), GFP_KERNEL); 2919 if (!listener) 2920 return NULL; 2921 cm_core->stats_listen_nodes_created++; 2922 memcpy(listener->loc_addr, cm_info->loc_addr, 2923 sizeof(listener->loc_addr)); 2924 listener->loc_port = cm_info->loc_port; 2925 2926 INIT_LIST_HEAD(&listener->child_listen_list); 2927 2928 refcount_set(&listener->refcnt, 1); 2929 } else { 2930 listener->reused_node = 1; 2931 } 2932 2933 listener->cm_id = cm_info->cm_id; 2934 listener->ipv4 = cm_info->ipv4; 2935 listener->vlan_id = cm_info->vlan_id; 2936 atomic_set(&listener->pend_accepts_cnt, 0); 2937 listener->cm_core = cm_core; 2938 listener->iwdev = iwdev; 2939 2940 listener->backlog = cm_info->backlog; 2941 listener->listener_state = IRDMA_CM_LISTENER_ACTIVE_STATE; 2942 2943 if (!listener->reused_node) { 2944 spin_lock_irqsave(&cm_core->listen_list_lock, flags); 2945 list_add(&listener->list, &cm_core->listen_list); 2946 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); 2947 } 2948 2949 return listener; 2950 } 2951 2952 /** 2953 * irdma_create_cm_node - make a connection node with params 2954 * @cm_core: cm's core 2955 * @iwdev: iwarp device structure 2956 * @conn_param: connection parameters 2957 * @cm_info: quad info for connection 2958 * @caller_cm_node: pointer to cm_node structure to return 2959 */ 2960 static int irdma_create_cm_node(struct irdma_cm_core *cm_core, 2961 struct irdma_device *iwdev, 2962 struct iw_cm_conn_param *conn_param, 2963 struct irdma_cm_info *cm_info, 2964 struct irdma_cm_node **caller_cm_node) 2965 { 2966 struct irdma_cm_node *cm_node; 2967 u16 private_data_len = conn_param->private_data_len; 2968 const void *private_data = conn_param->private_data; 2969 2970 /* create a CM connection node */ 2971 cm_node = irdma_make_cm_node(cm_core, iwdev, cm_info, NULL); 2972 if (!cm_node) 2973 return -ENOMEM; 2974 2975 /* set our node side to client (active) side */ 2976 cm_node->tcp_cntxt.client = 1; 2977 cm_node->tcp_cntxt.rcv_wscale = IRDMA_CM_DEFAULT_RCV_WND_SCALE; 2978 2979 irdma_record_ird_ord(cm_node, conn_param->ird, conn_param->ord); 2980 2981 cm_node->pdata.size = private_data_len; 2982 cm_node->pdata.addr = cm_node->pdata_buf; 2983 2984 memcpy(cm_node->pdata_buf, private_data, private_data_len); 2985 *caller_cm_node = cm_node; 2986 2987 return 0; 2988 } 2989 2990 /** 2991 * irdma_cm_reject - reject and teardown a connection 2992 * @cm_node: connection's node 2993 * @pdata: ptr to private data for reject 2994 * @plen: size of private data 2995 */ 2996 static int irdma_cm_reject(struct irdma_cm_node *cm_node, const void *pdata, 2997 u8 plen) 2998 { 2999 int ret; 3000 int passive_state; 3001 3002 if (cm_node->tcp_cntxt.client) 3003 return 0; 3004 3005 irdma_cleanup_retrans_entry(cm_node); 3006 3007 passive_state = atomic_add_return(1, &cm_node->passive_state); 3008 if (passive_state == IRDMA_SEND_RESET_EVENT) { 3009 cm_node->state = IRDMA_CM_STATE_CLOSED; 3010 irdma_rem_ref_cm_node(cm_node); 3011 return 0; 3012 } 3013 3014 if (cm_node->state == IRDMA_CM_STATE_LISTENER_DESTROYED) { 3015 irdma_rem_ref_cm_node(cm_node); 3016 return 0; 3017 } 3018 3019 ret = irdma_send_mpa_reject(cm_node, pdata, plen); 3020 if (!ret) 3021 return 0; 3022 3023 cm_node->state = IRDMA_CM_STATE_CLOSED; 3024 if (irdma_send_reset(cm_node)) 3025 ibdev_dbg(&cm_node->iwdev->ibdev, 3026 "CM: send reset failed\n"); 3027 3028 return ret; 3029 } 3030 3031 /** 3032 * irdma_cm_close - close of cm connection 3033 * @cm_node: connection's node 3034 */ 3035 static int irdma_cm_close(struct irdma_cm_node *cm_node) 3036 { 3037 switch (cm_node->state) { 3038 case IRDMA_CM_STATE_SYN_RCVD: 3039 case IRDMA_CM_STATE_SYN_SENT: 3040 case IRDMA_CM_STATE_ONE_SIDE_ESTABLISHED: 3041 case IRDMA_CM_STATE_ESTABLISHED: 3042 case IRDMA_CM_STATE_ACCEPTING: 3043 case IRDMA_CM_STATE_MPAREQ_SENT: 3044 case IRDMA_CM_STATE_MPAREQ_RCVD: 3045 irdma_cleanup_retrans_entry(cm_node); 3046 irdma_send_reset(cm_node); 3047 break; 3048 case IRDMA_CM_STATE_CLOSE_WAIT: 3049 cm_node->state = IRDMA_CM_STATE_LAST_ACK; 3050 irdma_send_fin(cm_node); 3051 break; 3052 case IRDMA_CM_STATE_FIN_WAIT1: 3053 case IRDMA_CM_STATE_FIN_WAIT2: 3054 case IRDMA_CM_STATE_LAST_ACK: 3055 case IRDMA_CM_STATE_TIME_WAIT: 3056 case IRDMA_CM_STATE_CLOSING: 3057 return -EINVAL; 3058 case IRDMA_CM_STATE_LISTENING: 3059 irdma_cleanup_retrans_entry(cm_node); 3060 irdma_send_reset(cm_node); 3061 break; 3062 case IRDMA_CM_STATE_MPAREJ_RCVD: 3063 case IRDMA_CM_STATE_UNKNOWN: 3064 case IRDMA_CM_STATE_INITED: 3065 case IRDMA_CM_STATE_CLOSED: 3066 case IRDMA_CM_STATE_LISTENER_DESTROYED: 3067 irdma_rem_ref_cm_node(cm_node); 3068 break; 3069 case IRDMA_CM_STATE_OFFLOADED: 3070 if (cm_node->send_entry) 3071 ibdev_dbg(&cm_node->iwdev->ibdev, 3072 "CM: CM send_entry in OFFLOADED state\n"); 3073 irdma_rem_ref_cm_node(cm_node); 3074 break; 3075 } 3076 3077 return 0; 3078 } 3079 3080 /** 3081 * irdma_receive_ilq - recv an ETHERNET packet, and process it 3082 * through CM 3083 * @vsi: VSI structure of dev 3084 * @rbuf: receive buffer 3085 */ 3086 void irdma_receive_ilq(struct irdma_sc_vsi *vsi, struct irdma_puda_buf *rbuf) 3087 { 3088 struct irdma_cm_node *cm_node; 3089 struct irdma_cm_listener *listener; 3090 struct iphdr *iph; 3091 struct ipv6hdr *ip6h; 3092 struct tcphdr *tcph; 3093 struct irdma_cm_info cm_info = {}; 3094 struct irdma_device *iwdev = vsi->back_vsi; 3095 struct irdma_cm_core *cm_core = &iwdev->cm_core; 3096 struct vlan_ethhdr *ethh; 3097 u16 vtag; 3098 3099 /* if vlan, then maclen = 18 else 14 */ 3100 iph = (struct iphdr *)rbuf->iph; 3101 print_hex_dump_debug("ILQ: RECEIVE ILQ BUFFER", DUMP_PREFIX_OFFSET, 3102 16, 8, rbuf->mem.va, rbuf->totallen, false); 3103 if (iwdev->rf->sc_dev.hw_attrs.uk_attrs.hw_rev >= IRDMA_GEN_2) { 3104 if (rbuf->vlan_valid) { 3105 vtag = rbuf->vlan_id; 3106 cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >> 3107 VLAN_PRIO_SHIFT; 3108 cm_info.vlan_id = vtag & VLAN_VID_MASK; 3109 } else { 3110 cm_info.vlan_id = 0xFFFF; 3111 } 3112 } else { 3113 ethh = rbuf->mem.va; 3114 3115 if (ethh->h_vlan_proto == htons(ETH_P_8021Q)) { 3116 vtag = ntohs(ethh->h_vlan_TCI); 3117 cm_info.user_pri = (vtag & VLAN_PRIO_MASK) >> 3118 VLAN_PRIO_SHIFT; 3119 cm_info.vlan_id = vtag & VLAN_VID_MASK; 3120 ibdev_dbg(&cm_core->iwdev->ibdev, 3121 "CM: vlan_id=%d\n", cm_info.vlan_id); 3122 } else { 3123 cm_info.vlan_id = 0xFFFF; 3124 } 3125 } 3126 tcph = (struct tcphdr *)rbuf->tcph; 3127 3128 if (rbuf->ipv4) { 3129 cm_info.loc_addr[0] = ntohl(iph->daddr); 3130 cm_info.rem_addr[0] = ntohl(iph->saddr); 3131 cm_info.ipv4 = true; 3132 cm_info.tos = iph->tos; 3133 } else { 3134 ip6h = (struct ipv6hdr *)rbuf->iph; 3135 irdma_copy_ip_ntohl(cm_info.loc_addr, 3136 ip6h->daddr.in6_u.u6_addr32); 3137 irdma_copy_ip_ntohl(cm_info.rem_addr, 3138 ip6h->saddr.in6_u.u6_addr32); 3139 cm_info.ipv4 = false; 3140 cm_info.tos = (ip6h->priority << 4) | (ip6h->flow_lbl[0] >> 4); 3141 } 3142 cm_info.loc_port = ntohs(tcph->dest); 3143 cm_info.rem_port = ntohs(tcph->source); 3144 cm_node = irdma_find_node(cm_core, cm_info.rem_port, cm_info.rem_addr, 3145 cm_info.loc_port, cm_info.loc_addr, cm_info.vlan_id); 3146 3147 if (!cm_node) { 3148 /* Only type of packet accepted are for the 3149 * PASSIVE open (syn only) 3150 */ 3151 if (!tcph->syn || tcph->ack) 3152 return; 3153 3154 listener = irdma_find_listener(cm_core, 3155 cm_info.loc_addr, 3156 cm_info.loc_port, 3157 cm_info.vlan_id, 3158 IRDMA_CM_LISTENER_ACTIVE_STATE); 3159 if (!listener) { 3160 cm_info.cm_id = NULL; 3161 ibdev_dbg(&cm_core->iwdev->ibdev, 3162 "CM: no listener found\n"); 3163 return; 3164 } 3165 3166 cm_info.cm_id = listener->cm_id; 3167 cm_node = irdma_make_cm_node(cm_core, iwdev, &cm_info, 3168 listener); 3169 if (!cm_node) { 3170 ibdev_dbg(&cm_core->iwdev->ibdev, 3171 "CM: allocate node failed\n"); 3172 refcount_dec(&listener->refcnt); 3173 return; 3174 } 3175 3176 if (!tcph->rst && !tcph->fin) { 3177 cm_node->state = IRDMA_CM_STATE_LISTENING; 3178 } else { 3179 irdma_rem_ref_cm_node(cm_node); 3180 return; 3181 } 3182 3183 refcount_inc(&cm_node->refcnt); 3184 } else if (cm_node->state == IRDMA_CM_STATE_OFFLOADED) { 3185 irdma_rem_ref_cm_node(cm_node); 3186 return; 3187 } 3188 3189 irdma_process_pkt(cm_node, rbuf); 3190 irdma_rem_ref_cm_node(cm_node); 3191 } 3192 3193 static int irdma_add_qh(struct irdma_cm_node *cm_node, bool active) 3194 { 3195 if (!active) 3196 irdma_add_conn_est_qh(cm_node); 3197 return 0; 3198 } 3199 3200 static void irdma_cm_free_ah_nop(struct irdma_cm_node *cm_node) 3201 { 3202 } 3203 3204 /** 3205 * irdma_setup_cm_core - setup top level instance of a cm core 3206 * @iwdev: iwarp device structure 3207 * @rdma_ver: HW version 3208 */ 3209 int irdma_setup_cm_core(struct irdma_device *iwdev, u8 rdma_ver) 3210 { 3211 struct irdma_cm_core *cm_core = &iwdev->cm_core; 3212 3213 cm_core->iwdev = iwdev; 3214 cm_core->dev = &iwdev->rf->sc_dev; 3215 3216 /* Handles CM event work items send to Iwarp core */ 3217 cm_core->event_wq = alloc_ordered_workqueue("iwarp-event-wq", 0); 3218 if (!cm_core->event_wq) 3219 return -ENOMEM; 3220 3221 INIT_LIST_HEAD(&cm_core->listen_list); 3222 3223 timer_setup(&cm_core->tcp_timer, irdma_cm_timer_tick, 0); 3224 3225 spin_lock_init(&cm_core->ht_lock); 3226 spin_lock_init(&cm_core->listen_list_lock); 3227 spin_lock_init(&cm_core->apbvt_lock); 3228 switch (rdma_ver) { 3229 case IRDMA_GEN_1: 3230 cm_core->form_cm_frame = irdma_form_uda_cm_frame; 3231 cm_core->cm_create_ah = irdma_add_qh; 3232 cm_core->cm_free_ah = irdma_cm_free_ah_nop; 3233 break; 3234 case IRDMA_GEN_2: 3235 default: 3236 cm_core->form_cm_frame = irdma_form_ah_cm_frame; 3237 cm_core->cm_create_ah = irdma_cm_create_ah; 3238 cm_core->cm_free_ah = irdma_cm_free_ah; 3239 } 3240 3241 return 0; 3242 } 3243 3244 /** 3245 * irdma_cleanup_cm_core - deallocate a top level instance of a 3246 * cm core 3247 * @cm_core: cm's core 3248 */ 3249 void irdma_cleanup_cm_core(struct irdma_cm_core *cm_core) 3250 { 3251 if (!cm_core) 3252 return; 3253 3254 del_timer_sync(&cm_core->tcp_timer); 3255 3256 destroy_workqueue(cm_core->event_wq); 3257 cm_core->dev->ws_reset(&cm_core->iwdev->vsi); 3258 } 3259 3260 /** 3261 * irdma_init_tcp_ctx - setup qp context 3262 * @cm_node: connection's node 3263 * @tcp_info: offload info for tcp 3264 * @iwqp: associate qp for the connection 3265 */ 3266 static void irdma_init_tcp_ctx(struct irdma_cm_node *cm_node, 3267 struct irdma_tcp_offload_info *tcp_info, 3268 struct irdma_qp *iwqp) 3269 { 3270 tcp_info->ipv4 = cm_node->ipv4; 3271 tcp_info->drop_ooo_seg = !iwqp->iwdev->iw_ooo; 3272 tcp_info->wscale = true; 3273 tcp_info->ignore_tcp_opt = true; 3274 tcp_info->ignore_tcp_uns_opt = true; 3275 tcp_info->no_nagle = false; 3276 3277 tcp_info->ttl = IRDMA_DEFAULT_TTL; 3278 tcp_info->rtt_var = IRDMA_DEFAULT_RTT_VAR; 3279 tcp_info->ss_thresh = IRDMA_DEFAULT_SS_THRESH; 3280 tcp_info->rexmit_thresh = IRDMA_DEFAULT_REXMIT_THRESH; 3281 3282 tcp_info->tcp_state = IRDMA_TCP_STATE_ESTABLISHED; 3283 tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale; 3284 tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale; 3285 3286 tcp_info->snd_nxt = cm_node->tcp_cntxt.loc_seq_num; 3287 tcp_info->snd_wnd = cm_node->tcp_cntxt.snd_wnd; 3288 tcp_info->rcv_nxt = cm_node->tcp_cntxt.rcv_nxt; 3289 tcp_info->snd_max = cm_node->tcp_cntxt.loc_seq_num; 3290 3291 tcp_info->snd_una = cm_node->tcp_cntxt.loc_seq_num; 3292 tcp_info->cwnd = 2 * cm_node->tcp_cntxt.mss; 3293 tcp_info->snd_wl1 = cm_node->tcp_cntxt.rcv_nxt; 3294 tcp_info->snd_wl2 = cm_node->tcp_cntxt.loc_seq_num; 3295 tcp_info->max_snd_window = cm_node->tcp_cntxt.max_snd_wnd; 3296 tcp_info->rcv_wnd = cm_node->tcp_cntxt.rcv_wnd 3297 << cm_node->tcp_cntxt.rcv_wscale; 3298 3299 tcp_info->flow_label = 0; 3300 tcp_info->snd_mss = (u32)cm_node->tcp_cntxt.mss; 3301 tcp_info->tos = cm_node->tos; 3302 if (cm_node->vlan_id < VLAN_N_VID) { 3303 tcp_info->insert_vlan_tag = true; 3304 tcp_info->vlan_tag = cm_node->vlan_id; 3305 tcp_info->vlan_tag |= cm_node->user_pri << VLAN_PRIO_SHIFT; 3306 } 3307 if (cm_node->ipv4) { 3308 tcp_info->src_port = cm_node->loc_port; 3309 tcp_info->dst_port = cm_node->rem_port; 3310 3311 tcp_info->dest_ip_addr[3] = cm_node->rem_addr[0]; 3312 tcp_info->local_ipaddr[3] = cm_node->loc_addr[0]; 3313 tcp_info->arp_idx = (u16)irdma_arp_table(iwqp->iwdev->rf, 3314 &tcp_info->dest_ip_addr[3], 3315 true, NULL, 3316 IRDMA_ARP_RESOLVE); 3317 } else { 3318 tcp_info->src_port = cm_node->loc_port; 3319 tcp_info->dst_port = cm_node->rem_port; 3320 memcpy(tcp_info->dest_ip_addr, cm_node->rem_addr, 3321 sizeof(tcp_info->dest_ip_addr)); 3322 memcpy(tcp_info->local_ipaddr, cm_node->loc_addr, 3323 sizeof(tcp_info->local_ipaddr)); 3324 3325 tcp_info->arp_idx = (u16)irdma_arp_table(iwqp->iwdev->rf, 3326 &tcp_info->dest_ip_addr[0], 3327 false, NULL, 3328 IRDMA_ARP_RESOLVE); 3329 } 3330 } 3331 3332 /** 3333 * irdma_cm_init_tsa_conn - setup qp for RTS 3334 * @iwqp: associate qp for the connection 3335 * @cm_node: connection's node 3336 */ 3337 static void irdma_cm_init_tsa_conn(struct irdma_qp *iwqp, 3338 struct irdma_cm_node *cm_node) 3339 { 3340 struct irdma_iwarp_offload_info *iwarp_info; 3341 struct irdma_qp_host_ctx_info *ctx_info; 3342 3343 iwarp_info = &iwqp->iwarp_info; 3344 ctx_info = &iwqp->ctx_info; 3345 3346 ctx_info->tcp_info = &iwqp->tcp_info; 3347 ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id; 3348 ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id; 3349 3350 iwarp_info->ord_size = cm_node->ord_size; 3351 iwarp_info->ird_size = cm_node->ird_size; 3352 iwarp_info->rd_en = true; 3353 iwarp_info->rdmap_ver = 1; 3354 iwarp_info->ddp_ver = 1; 3355 iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id; 3356 3357 ctx_info->tcp_info_valid = true; 3358 ctx_info->iwarp_info_valid = true; 3359 ctx_info->user_pri = cm_node->user_pri; 3360 3361 irdma_init_tcp_ctx(cm_node, &iwqp->tcp_info, iwqp); 3362 if (cm_node->snd_mark_en) { 3363 iwarp_info->snd_mark_en = true; 3364 iwarp_info->snd_mark_offset = (iwqp->tcp_info.snd_nxt & SNDMARKER_SEQNMASK) + 3365 cm_node->lsmm_size; 3366 } 3367 3368 cm_node->state = IRDMA_CM_STATE_OFFLOADED; 3369 iwqp->tcp_info.tcp_state = IRDMA_TCP_STATE_ESTABLISHED; 3370 iwqp->tcp_info.src_mac_addr_idx = iwqp->iwdev->mac_ip_table_idx; 3371 3372 if (cm_node->rcv_mark_en) { 3373 iwarp_info->rcv_mark_en = true; 3374 iwarp_info->align_hdrs = true; 3375 } 3376 3377 irdma_sc_qp_setctx(&iwqp->sc_qp, iwqp->host_ctx.va, ctx_info); 3378 3379 /* once tcp_info is set, no need to do it again */ 3380 ctx_info->tcp_info_valid = false; 3381 ctx_info->iwarp_info_valid = false; 3382 } 3383 3384 /** 3385 * irdma_cm_disconn - when a connection is being closed 3386 * @iwqp: associated qp for the connection 3387 */ 3388 void irdma_cm_disconn(struct irdma_qp *iwqp) 3389 { 3390 struct irdma_device *iwdev = iwqp->iwdev; 3391 struct disconn_work *work; 3392 unsigned long flags; 3393 3394 work = kzalloc(sizeof(*work), GFP_ATOMIC); 3395 if (!work) 3396 return; 3397 3398 spin_lock_irqsave(&iwdev->rf->qptable_lock, flags); 3399 if (!iwdev->rf->qp_table[iwqp->ibqp.qp_num]) { 3400 spin_unlock_irqrestore(&iwdev->rf->qptable_lock, flags); 3401 ibdev_dbg(&iwdev->ibdev, 3402 "CM: qp_id %d is already freed\n", 3403 iwqp->ibqp.qp_num); 3404 kfree(work); 3405 return; 3406 } 3407 irdma_qp_add_ref(&iwqp->ibqp); 3408 spin_unlock_irqrestore(&iwdev->rf->qptable_lock, flags); 3409 3410 work->iwqp = iwqp; 3411 INIT_WORK(&work->work, irdma_disconnect_worker); 3412 queue_work(iwdev->cleanup_wq, &work->work); 3413 } 3414 3415 /** 3416 * irdma_qp_disconnect - free qp and close cm 3417 * @iwqp: associate qp for the connection 3418 */ 3419 static void irdma_qp_disconnect(struct irdma_qp *iwqp) 3420 { 3421 struct irdma_device *iwdev = iwqp->iwdev; 3422 3423 iwqp->active_conn = 0; 3424 /* close the CM node down if it is still active */ 3425 ibdev_dbg(&iwdev->ibdev, "CM: Call close API\n"); 3426 irdma_cm_close(iwqp->cm_node); 3427 } 3428 3429 /** 3430 * irdma_cm_disconn_true - called by worker thread to disconnect qp 3431 * @iwqp: associate qp for the connection 3432 */ 3433 static void irdma_cm_disconn_true(struct irdma_qp *iwqp) 3434 { 3435 struct iw_cm_id *cm_id; 3436 struct irdma_device *iwdev; 3437 struct irdma_sc_qp *qp = &iwqp->sc_qp; 3438 u16 last_ae; 3439 u8 original_hw_tcp_state; 3440 u8 original_ibqp_state; 3441 int disconn_status = 0; 3442 int issue_disconn = 0; 3443 int issue_close = 0; 3444 int issue_flush = 0; 3445 unsigned long flags; 3446 int err; 3447 3448 iwdev = iwqp->iwdev; 3449 spin_lock_irqsave(&iwqp->lock, flags); 3450 if (rdma_protocol_roce(&iwdev->ibdev, 1)) { 3451 struct ib_qp_attr attr; 3452 3453 if (iwqp->flush_issued || iwqp->sc_qp.qp_uk.destroy_pending) { 3454 spin_unlock_irqrestore(&iwqp->lock, flags); 3455 return; 3456 } 3457 3458 spin_unlock_irqrestore(&iwqp->lock, flags); 3459 3460 attr.qp_state = IB_QPS_ERR; 3461 irdma_modify_qp_roce(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); 3462 irdma_ib_qp_event(iwqp, qp->event_type); 3463 return; 3464 } 3465 3466 cm_id = iwqp->cm_id; 3467 original_hw_tcp_state = iwqp->hw_tcp_state; 3468 original_ibqp_state = iwqp->ibqp_state; 3469 last_ae = iwqp->last_aeq; 3470 3471 if (qp->term_flags) { 3472 issue_disconn = 1; 3473 issue_close = 1; 3474 iwqp->cm_id = NULL; 3475 irdma_terminate_del_timer(qp); 3476 if (!iwqp->flush_issued) { 3477 iwqp->flush_issued = 1; 3478 issue_flush = 1; 3479 } 3480 } else if ((original_hw_tcp_state == IRDMA_TCP_STATE_CLOSE_WAIT) || 3481 ((original_ibqp_state == IB_QPS_RTS) && 3482 (last_ae == IRDMA_AE_LLP_CONNECTION_RESET))) { 3483 issue_disconn = 1; 3484 if (last_ae == IRDMA_AE_LLP_CONNECTION_RESET) 3485 disconn_status = -ECONNRESET; 3486 } 3487 3488 if (original_hw_tcp_state == IRDMA_TCP_STATE_CLOSED || 3489 original_hw_tcp_state == IRDMA_TCP_STATE_TIME_WAIT || 3490 last_ae == IRDMA_AE_RDMAP_ROE_BAD_LLP_CLOSE || 3491 last_ae == IRDMA_AE_BAD_CLOSE || 3492 last_ae == IRDMA_AE_LLP_CONNECTION_RESET || iwdev->rf->reset || !cm_id) { 3493 issue_close = 1; 3494 iwqp->cm_id = NULL; 3495 qp->term_flags = 0; 3496 if (!iwqp->flush_issued) { 3497 iwqp->flush_issued = 1; 3498 issue_flush = 1; 3499 } 3500 } 3501 3502 spin_unlock_irqrestore(&iwqp->lock, flags); 3503 if (issue_flush && !iwqp->sc_qp.qp_uk.destroy_pending) { 3504 irdma_flush_wqes(iwqp, IRDMA_FLUSH_SQ | IRDMA_FLUSH_RQ | 3505 IRDMA_FLUSH_WAIT); 3506 3507 if (qp->term_flags) 3508 irdma_ib_qp_event(iwqp, qp->event_type); 3509 } 3510 3511 if (!cm_id || !cm_id->event_handler) 3512 return; 3513 3514 spin_lock_irqsave(&iwdev->cm_core.ht_lock, flags); 3515 if (!iwqp->cm_node) { 3516 spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags); 3517 return; 3518 } 3519 refcount_inc(&iwqp->cm_node->refcnt); 3520 3521 spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags); 3522 3523 if (issue_disconn) { 3524 err = irdma_send_cm_event(iwqp->cm_node, cm_id, 3525 IW_CM_EVENT_DISCONNECT, 3526 disconn_status); 3527 if (err) 3528 ibdev_dbg(&iwdev->ibdev, 3529 "CM: disconnect event failed: - cm_id = %p\n", 3530 cm_id); 3531 } 3532 if (issue_close) { 3533 cm_id->provider_data = iwqp; 3534 err = irdma_send_cm_event(iwqp->cm_node, cm_id, 3535 IW_CM_EVENT_CLOSE, 0); 3536 if (err) 3537 ibdev_dbg(&iwdev->ibdev, 3538 "CM: close event failed: - cm_id = %p\n", 3539 cm_id); 3540 irdma_qp_disconnect(iwqp); 3541 } 3542 irdma_rem_ref_cm_node(iwqp->cm_node); 3543 } 3544 3545 /** 3546 * irdma_disconnect_worker - worker for connection close 3547 * @work: points or disconn structure 3548 */ 3549 static void irdma_disconnect_worker(struct work_struct *work) 3550 { 3551 struct disconn_work *dwork = container_of(work, struct disconn_work, work); 3552 struct irdma_qp *iwqp = dwork->iwqp; 3553 3554 kfree(dwork); 3555 irdma_cm_disconn_true(iwqp); 3556 irdma_qp_rem_ref(&iwqp->ibqp); 3557 } 3558 3559 /** 3560 * irdma_free_lsmm_rsrc - free lsmm memory and deregister 3561 * @iwqp: associate qp for the connection 3562 */ 3563 void irdma_free_lsmm_rsrc(struct irdma_qp *iwqp) 3564 { 3565 struct irdma_device *iwdev; 3566 3567 iwdev = iwqp->iwdev; 3568 3569 if (iwqp->ietf_mem.va) { 3570 if (iwqp->lsmm_mr) 3571 iwdev->ibdev.ops.dereg_mr(iwqp->lsmm_mr, NULL); 3572 dma_free_coherent(iwdev->rf->sc_dev.hw->device, 3573 iwqp->ietf_mem.size, iwqp->ietf_mem.va, 3574 iwqp->ietf_mem.pa); 3575 iwqp->ietf_mem.va = NULL; 3576 iwqp->ietf_mem.va = NULL; 3577 } 3578 } 3579 3580 /** 3581 * irdma_accept - registered call for connection to be accepted 3582 * @cm_id: cm information for passive connection 3583 * @conn_param: accpet parameters 3584 */ 3585 int irdma_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) 3586 { 3587 struct ib_qp *ibqp; 3588 struct irdma_qp *iwqp; 3589 struct irdma_device *iwdev; 3590 struct irdma_sc_dev *dev; 3591 struct irdma_cm_node *cm_node; 3592 struct ib_qp_attr attr = {}; 3593 int passive_state; 3594 struct ib_mr *ibmr; 3595 struct irdma_pd *iwpd; 3596 u16 buf_len = 0; 3597 struct irdma_kmem_info accept; 3598 u64 tagged_offset; 3599 int wait_ret; 3600 int ret = 0; 3601 3602 ibqp = irdma_get_qp(cm_id->device, conn_param->qpn); 3603 if (!ibqp) 3604 return -EINVAL; 3605 3606 iwqp = to_iwqp(ibqp); 3607 iwdev = iwqp->iwdev; 3608 dev = &iwdev->rf->sc_dev; 3609 cm_node = cm_id->provider_data; 3610 3611 if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) { 3612 cm_node->ipv4 = true; 3613 cm_node->vlan_id = irdma_get_vlan_ipv4(cm_node->loc_addr); 3614 } else { 3615 cm_node->ipv4 = false; 3616 irdma_netdev_vlan_ipv6(cm_node->loc_addr, &cm_node->vlan_id, 3617 NULL); 3618 } 3619 ibdev_dbg(&iwdev->ibdev, "CM: Accept vlan_id=%d\n", 3620 cm_node->vlan_id); 3621 3622 trace_irdma_accept(cm_node, 0, NULL); 3623 3624 if (cm_node->state == IRDMA_CM_STATE_LISTENER_DESTROYED) { 3625 ret = -EINVAL; 3626 goto error; 3627 } 3628 3629 passive_state = atomic_add_return(1, &cm_node->passive_state); 3630 if (passive_state == IRDMA_SEND_RESET_EVENT) { 3631 ret = -ECONNRESET; 3632 goto error; 3633 } 3634 3635 buf_len = conn_param->private_data_len + IRDMA_MAX_IETF_SIZE; 3636 iwqp->ietf_mem.size = ALIGN(buf_len, 1); 3637 iwqp->ietf_mem.va = dma_alloc_coherent(dev->hw->device, 3638 iwqp->ietf_mem.size, 3639 &iwqp->ietf_mem.pa, GFP_KERNEL); 3640 if (!iwqp->ietf_mem.va) { 3641 ret = -ENOMEM; 3642 goto error; 3643 } 3644 3645 cm_node->pdata.size = conn_param->private_data_len; 3646 accept.addr = iwqp->ietf_mem.va; 3647 accept.size = irdma_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY); 3648 memcpy((u8 *)accept.addr + accept.size, conn_param->private_data, 3649 conn_param->private_data_len); 3650 3651 if (cm_node->dev->ws_add(iwqp->sc_qp.vsi, cm_node->user_pri)) { 3652 ret = -ENOMEM; 3653 goto error; 3654 } 3655 iwqp->sc_qp.user_pri = cm_node->user_pri; 3656 irdma_qp_add_qos(&iwqp->sc_qp); 3657 /* setup our first outgoing iWarp send WQE (the IETF frame response) */ 3658 iwpd = iwqp->iwpd; 3659 tagged_offset = (uintptr_t)iwqp->ietf_mem.va; 3660 ibmr = irdma_reg_phys_mr(&iwpd->ibpd, iwqp->ietf_mem.pa, buf_len, 3661 IB_ACCESS_LOCAL_WRITE, &tagged_offset); 3662 if (IS_ERR(ibmr)) { 3663 ret = -ENOMEM; 3664 goto error; 3665 } 3666 3667 ibmr->pd = &iwpd->ibpd; 3668 ibmr->device = iwpd->ibpd.device; 3669 iwqp->lsmm_mr = ibmr; 3670 if (iwqp->page) 3671 iwqp->sc_qp.qp_uk.sq_base = kmap_local_page(iwqp->page); 3672 3673 cm_node->lsmm_size = accept.size + conn_param->private_data_len; 3674 irdma_sc_send_lsmm(&iwqp->sc_qp, iwqp->ietf_mem.va, cm_node->lsmm_size, 3675 ibmr->lkey); 3676 3677 if (iwqp->page) 3678 kunmap_local(iwqp->sc_qp.qp_uk.sq_base); 3679 3680 iwqp->cm_id = cm_id; 3681 cm_node->cm_id = cm_id; 3682 3683 cm_id->provider_data = iwqp; 3684 iwqp->active_conn = 0; 3685 iwqp->cm_node = cm_node; 3686 cm_node->iwqp = iwqp; 3687 irdma_cm_init_tsa_conn(iwqp, cm_node); 3688 irdma_qp_add_ref(&iwqp->ibqp); 3689 cm_id->add_ref(cm_id); 3690 3691 attr.qp_state = IB_QPS_RTS; 3692 cm_node->qhash_set = false; 3693 cm_node->cm_core->cm_free_ah(cm_node); 3694 3695 irdma_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); 3696 if (dev->hw_attrs.uk_attrs.feature_flags & IRDMA_FEATURE_RTS_AE) { 3697 wait_ret = wait_event_interruptible_timeout(iwqp->waitq, 3698 iwqp->rts_ae_rcvd, 3699 IRDMA_MAX_TIMEOUT); 3700 if (!wait_ret) { 3701 ibdev_dbg(&iwdev->ibdev, 3702 "CM: Slow Connection: cm_node=%p, loc_port=%d, rem_port=%d, cm_id=%p\n", 3703 cm_node, cm_node->loc_port, 3704 cm_node->rem_port, cm_node->cm_id); 3705 ret = -ECONNRESET; 3706 goto error; 3707 } 3708 } 3709 3710 irdma_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0); 3711 cm_node->accelerated = true; 3712 complete(&cm_node->establish_comp); 3713 3714 if (cm_node->accept_pend) { 3715 atomic_dec(&cm_node->listener->pend_accepts_cnt); 3716 cm_node->accept_pend = 0; 3717 } 3718 3719 ibdev_dbg(&iwdev->ibdev, 3720 "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", 3721 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr, 3722 cm_node->loc_addr, cm_node, cm_id, ibqp->qp_num); 3723 cm_node->cm_core->stats_accepts++; 3724 3725 return 0; 3726 error: 3727 irdma_free_lsmm_rsrc(iwqp); 3728 irdma_rem_ref_cm_node(cm_node); 3729 3730 return ret; 3731 } 3732 3733 /** 3734 * irdma_reject - registered call for connection to be rejected 3735 * @cm_id: cm information for passive connection 3736 * @pdata: private data to be sent 3737 * @pdata_len: private data length 3738 */ 3739 int irdma_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len) 3740 { 3741 struct irdma_device *iwdev; 3742 struct irdma_cm_node *cm_node; 3743 3744 cm_node = cm_id->provider_data; 3745 cm_node->pdata.size = pdata_len; 3746 3747 trace_irdma_reject(cm_node, 0, NULL); 3748 3749 iwdev = to_iwdev(cm_id->device); 3750 if (!iwdev) 3751 return -EINVAL; 3752 3753 cm_node->cm_core->stats_rejects++; 3754 3755 if (pdata_len + sizeof(struct ietf_mpa_v2) > IRDMA_MAX_CM_BUF) 3756 return -EINVAL; 3757 3758 return irdma_cm_reject(cm_node, pdata, pdata_len); 3759 } 3760 3761 /** 3762 * irdma_connect - registered call for connection to be established 3763 * @cm_id: cm information for passive connection 3764 * @conn_param: Information about the connection 3765 */ 3766 int irdma_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) 3767 { 3768 struct ib_qp *ibqp; 3769 struct irdma_qp *iwqp; 3770 struct irdma_device *iwdev; 3771 struct irdma_cm_node *cm_node; 3772 struct irdma_cm_info cm_info; 3773 struct sockaddr_in *laddr; 3774 struct sockaddr_in *raddr; 3775 struct sockaddr_in6 *laddr6; 3776 struct sockaddr_in6 *raddr6; 3777 int ret = 0; 3778 3779 ibqp = irdma_get_qp(cm_id->device, conn_param->qpn); 3780 if (!ibqp) 3781 return -EINVAL; 3782 iwqp = to_iwqp(ibqp); 3783 if (!iwqp) 3784 return -EINVAL; 3785 iwdev = iwqp->iwdev; 3786 if (!iwdev) 3787 return -EINVAL; 3788 3789 laddr = (struct sockaddr_in *)&cm_id->m_local_addr; 3790 raddr = (struct sockaddr_in *)&cm_id->m_remote_addr; 3791 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr; 3792 raddr6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr; 3793 3794 if (!(laddr->sin_port) || !(raddr->sin_port)) 3795 return -EINVAL; 3796 3797 iwqp->active_conn = 1; 3798 iwqp->cm_id = NULL; 3799 cm_id->provider_data = iwqp; 3800 3801 /* set up the connection params for the node */ 3802 if (cm_id->remote_addr.ss_family == AF_INET) { 3803 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV4) 3804 return -EINVAL; 3805 3806 cm_info.ipv4 = true; 3807 memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr)); 3808 memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr)); 3809 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr); 3810 cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr); 3811 cm_info.loc_port = ntohs(laddr->sin_port); 3812 cm_info.rem_port = ntohs(raddr->sin_port); 3813 cm_info.vlan_id = irdma_get_vlan_ipv4(cm_info.loc_addr); 3814 } else { 3815 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV6) 3816 return -EINVAL; 3817 3818 cm_info.ipv4 = false; 3819 irdma_copy_ip_ntohl(cm_info.loc_addr, 3820 laddr6->sin6_addr.in6_u.u6_addr32); 3821 irdma_copy_ip_ntohl(cm_info.rem_addr, 3822 raddr6->sin6_addr.in6_u.u6_addr32); 3823 cm_info.loc_port = ntohs(laddr6->sin6_port); 3824 cm_info.rem_port = ntohs(raddr6->sin6_port); 3825 irdma_netdev_vlan_ipv6(cm_info.loc_addr, &cm_info.vlan_id, 3826 NULL); 3827 } 3828 cm_info.cm_id = cm_id; 3829 cm_info.qh_qpid = iwdev->vsi.ilq->qp_id; 3830 cm_info.tos = cm_id->tos; 3831 if (iwdev->vsi.dscp_mode) 3832 cm_info.user_pri = 3833 iwqp->sc_qp.vsi->dscp_map[irdma_tos2dscp(cm_info.tos)]; 3834 else 3835 cm_info.user_pri = rt_tos2priority(cm_id->tos); 3836 3837 if (iwqp->sc_qp.dev->ws_add(iwqp->sc_qp.vsi, cm_info.user_pri)) 3838 return -ENOMEM; 3839 iwqp->sc_qp.user_pri = cm_info.user_pri; 3840 irdma_qp_add_qos(&iwqp->sc_qp); 3841 ibdev_dbg(&iwdev->ibdev, "DCB: TOS:[%d] UP:[%d]\n", cm_id->tos, 3842 cm_info.user_pri); 3843 3844 trace_irdma_dcb_tos(iwdev, cm_id->tos, cm_info.user_pri); 3845 3846 ret = irdma_create_cm_node(&iwdev->cm_core, iwdev, conn_param, &cm_info, 3847 &cm_node); 3848 if (ret) 3849 return ret; 3850 ret = cm_node->cm_core->cm_create_ah(cm_node, true); 3851 if (ret) 3852 goto err; 3853 if (irdma_manage_qhash(iwdev, &cm_info, 3854 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 3855 IRDMA_QHASH_MANAGE_TYPE_ADD, NULL, true)) { 3856 ret = -EINVAL; 3857 goto err; 3858 } 3859 cm_node->qhash_set = true; 3860 3861 cm_node->apbvt_entry = irdma_add_apbvt(iwdev, cm_info.loc_port); 3862 if (!cm_node->apbvt_entry) { 3863 ret = -EINVAL; 3864 goto err; 3865 } 3866 3867 cm_node->apbvt_set = true; 3868 iwqp->cm_node = cm_node; 3869 cm_node->iwqp = iwqp; 3870 iwqp->cm_id = cm_id; 3871 irdma_qp_add_ref(&iwqp->ibqp); 3872 cm_id->add_ref(cm_id); 3873 3874 if (cm_node->state != IRDMA_CM_STATE_OFFLOADED) { 3875 cm_node->state = IRDMA_CM_STATE_SYN_SENT; 3876 ret = irdma_send_syn(cm_node, 0); 3877 if (ret) 3878 goto err; 3879 } 3880 3881 ibdev_dbg(&iwdev->ibdev, 3882 "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", 3883 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr, 3884 cm_node->loc_addr, cm_node, cm_id, ibqp->qp_num); 3885 3886 trace_irdma_connect(cm_node, 0, NULL); 3887 3888 return 0; 3889 3890 err: 3891 if (cm_info.ipv4) 3892 ibdev_dbg(&iwdev->ibdev, 3893 "CM: connect() FAILED: dest addr=%pI4", 3894 cm_info.rem_addr); 3895 else 3896 ibdev_dbg(&iwdev->ibdev, 3897 "CM: connect() FAILED: dest addr=%pI6", 3898 cm_info.rem_addr); 3899 irdma_rem_ref_cm_node(cm_node); 3900 iwdev->cm_core.stats_connect_errs++; 3901 3902 return ret; 3903 } 3904 3905 /** 3906 * irdma_create_listen - registered call creating listener 3907 * @cm_id: cm information for passive connection 3908 * @backlog: to max accept pending count 3909 */ 3910 int irdma_create_listen(struct iw_cm_id *cm_id, int backlog) 3911 { 3912 struct irdma_device *iwdev; 3913 struct irdma_cm_listener *cm_listen_node; 3914 struct irdma_cm_info cm_info = {}; 3915 struct sockaddr_in *laddr; 3916 struct sockaddr_in6 *laddr6; 3917 bool wildcard = false; 3918 int err; 3919 3920 iwdev = to_iwdev(cm_id->device); 3921 if (!iwdev) 3922 return -EINVAL; 3923 3924 laddr = (struct sockaddr_in *)&cm_id->m_local_addr; 3925 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr; 3926 cm_info.qh_qpid = iwdev->vsi.ilq->qp_id; 3927 3928 if (laddr->sin_family == AF_INET) { 3929 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV4) 3930 return -EINVAL; 3931 3932 cm_info.ipv4 = true; 3933 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr); 3934 cm_info.loc_port = ntohs(laddr->sin_port); 3935 3936 if (laddr->sin_addr.s_addr != htonl(INADDR_ANY)) { 3937 cm_info.vlan_id = irdma_get_vlan_ipv4(cm_info.loc_addr); 3938 } else { 3939 cm_info.vlan_id = 0xFFFF; 3940 wildcard = true; 3941 } 3942 } else { 3943 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV6) 3944 return -EINVAL; 3945 3946 cm_info.ipv4 = false; 3947 irdma_copy_ip_ntohl(cm_info.loc_addr, 3948 laddr6->sin6_addr.in6_u.u6_addr32); 3949 cm_info.loc_port = ntohs(laddr6->sin6_port); 3950 if (ipv6_addr_type(&laddr6->sin6_addr) != IPV6_ADDR_ANY) { 3951 irdma_netdev_vlan_ipv6(cm_info.loc_addr, 3952 &cm_info.vlan_id, NULL); 3953 } else { 3954 cm_info.vlan_id = 0xFFFF; 3955 wildcard = true; 3956 } 3957 } 3958 3959 if (cm_info.vlan_id >= VLAN_N_VID && iwdev->dcb_vlan_mode) 3960 cm_info.vlan_id = 0; 3961 cm_info.backlog = backlog; 3962 cm_info.cm_id = cm_id; 3963 3964 trace_irdma_create_listen(iwdev, &cm_info); 3965 3966 cm_listen_node = irdma_make_listen_node(&iwdev->cm_core, iwdev, 3967 &cm_info); 3968 if (!cm_listen_node) { 3969 ibdev_dbg(&iwdev->ibdev, 3970 "CM: cm_listen_node == NULL\n"); 3971 return -ENOMEM; 3972 } 3973 3974 cm_id->provider_data = cm_listen_node; 3975 3976 cm_listen_node->tos = cm_id->tos; 3977 if (iwdev->vsi.dscp_mode) 3978 cm_listen_node->user_pri = 3979 iwdev->vsi.dscp_map[irdma_tos2dscp(cm_id->tos)]; 3980 else 3981 cm_listen_node->user_pri = rt_tos2priority(cm_id->tos); 3982 cm_info.user_pri = cm_listen_node->user_pri; 3983 if (!cm_listen_node->reused_node) { 3984 if (wildcard) { 3985 err = irdma_add_mqh(iwdev, &cm_info, cm_listen_node); 3986 if (err) 3987 goto error; 3988 } else { 3989 err = irdma_manage_qhash(iwdev, &cm_info, 3990 IRDMA_QHASH_TYPE_TCP_SYN, 3991 IRDMA_QHASH_MANAGE_TYPE_ADD, 3992 NULL, true); 3993 if (err) 3994 goto error; 3995 3996 cm_listen_node->qhash_set = true; 3997 } 3998 3999 cm_listen_node->apbvt_entry = irdma_add_apbvt(iwdev, 4000 cm_info.loc_port); 4001 if (!cm_listen_node->apbvt_entry) 4002 goto error; 4003 } 4004 cm_id->add_ref(cm_id); 4005 cm_listen_node->cm_core->stats_listen_created++; 4006 ibdev_dbg(&iwdev->ibdev, 4007 "CM: loc_port=0x%04x loc_addr=%pI4 cm_listen_node=%p cm_id=%p qhash_set=%d vlan_id=%d\n", 4008 cm_listen_node->loc_port, cm_listen_node->loc_addr, 4009 cm_listen_node, cm_listen_node->cm_id, 4010 cm_listen_node->qhash_set, cm_listen_node->vlan_id); 4011 4012 return 0; 4013 4014 error: 4015 4016 irdma_cm_del_listen(&iwdev->cm_core, cm_listen_node, false); 4017 4018 return -EINVAL; 4019 } 4020 4021 /** 4022 * irdma_destroy_listen - registered call to destroy listener 4023 * @cm_id: cm information for passive connection 4024 */ 4025 int irdma_destroy_listen(struct iw_cm_id *cm_id) 4026 { 4027 struct irdma_device *iwdev; 4028 4029 iwdev = to_iwdev(cm_id->device); 4030 if (cm_id->provider_data) 4031 irdma_cm_del_listen(&iwdev->cm_core, cm_id->provider_data, 4032 true); 4033 else 4034 ibdev_dbg(&iwdev->ibdev, 4035 "CM: cm_id->provider_data was NULL\n"); 4036 4037 cm_id->rem_ref(cm_id); 4038 4039 return 0; 4040 } 4041 4042 /** 4043 * irdma_teardown_list_prep - add conn nodes slated for tear down to list 4044 * @cm_core: cm's core 4045 * @teardown_list: a list to which cm_node will be selected 4046 * @ipaddr: pointer to ip address 4047 * @nfo: pointer to cm_info structure instance 4048 * @disconnect_all: flag indicating disconnect all QPs 4049 */ 4050 static void irdma_teardown_list_prep(struct irdma_cm_core *cm_core, 4051 struct list_head *teardown_list, 4052 u32 *ipaddr, 4053 struct irdma_cm_info *nfo, 4054 bool disconnect_all) 4055 { 4056 struct irdma_cm_node *cm_node; 4057 int bkt; 4058 4059 hash_for_each_rcu(cm_core->cm_hash_tbl, bkt, cm_node, list) { 4060 if ((disconnect_all || 4061 (nfo->vlan_id == cm_node->vlan_id && 4062 !memcmp(cm_node->loc_addr, ipaddr, nfo->ipv4 ? 4 : 16))) && 4063 refcount_inc_not_zero(&cm_node->refcnt)) 4064 list_add(&cm_node->teardown_entry, teardown_list); 4065 } 4066 } 4067 4068 /** 4069 * irdma_cm_event_connected - handle connected active node 4070 * @event: the info for cm_node of connection 4071 */ 4072 static void irdma_cm_event_connected(struct irdma_cm_event *event) 4073 { 4074 struct irdma_qp *iwqp; 4075 struct irdma_device *iwdev; 4076 struct irdma_cm_node *cm_node; 4077 struct irdma_sc_dev *dev; 4078 struct ib_qp_attr attr = {}; 4079 struct iw_cm_id *cm_id; 4080 int status; 4081 bool read0; 4082 int wait_ret = 0; 4083 4084 cm_node = event->cm_node; 4085 cm_id = cm_node->cm_id; 4086 iwqp = cm_id->provider_data; 4087 iwdev = iwqp->iwdev; 4088 dev = &iwdev->rf->sc_dev; 4089 if (iwqp->sc_qp.qp_uk.destroy_pending) { 4090 status = -ETIMEDOUT; 4091 goto error; 4092 } 4093 4094 irdma_cm_init_tsa_conn(iwqp, cm_node); 4095 read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO); 4096 if (iwqp->page) 4097 iwqp->sc_qp.qp_uk.sq_base = kmap_local_page(iwqp->page); 4098 irdma_sc_send_rtt(&iwqp->sc_qp, read0); 4099 if (iwqp->page) 4100 kunmap_local(iwqp->sc_qp.qp_uk.sq_base); 4101 4102 attr.qp_state = IB_QPS_RTS; 4103 cm_node->qhash_set = false; 4104 irdma_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); 4105 if (dev->hw_attrs.uk_attrs.feature_flags & IRDMA_FEATURE_RTS_AE) { 4106 wait_ret = wait_event_interruptible_timeout(iwqp->waitq, 4107 iwqp->rts_ae_rcvd, 4108 IRDMA_MAX_TIMEOUT); 4109 if (!wait_ret) 4110 ibdev_dbg(&iwdev->ibdev, 4111 "CM: Slow Connection: cm_node=%p, loc_port=%d, rem_port=%d, cm_id=%p\n", 4112 cm_node, cm_node->loc_port, 4113 cm_node->rem_port, cm_node->cm_id); 4114 } 4115 4116 irdma_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 0); 4117 cm_node->accelerated = true; 4118 complete(&cm_node->establish_comp); 4119 cm_node->cm_core->cm_free_ah(cm_node); 4120 return; 4121 4122 error: 4123 iwqp->cm_id = NULL; 4124 cm_id->provider_data = NULL; 4125 irdma_send_cm_event(event->cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 4126 status); 4127 irdma_rem_ref_cm_node(event->cm_node); 4128 } 4129 4130 /** 4131 * irdma_cm_event_reset - handle reset 4132 * @event: the info for cm_node of connection 4133 */ 4134 static void irdma_cm_event_reset(struct irdma_cm_event *event) 4135 { 4136 struct irdma_cm_node *cm_node = event->cm_node; 4137 struct iw_cm_id *cm_id = cm_node->cm_id; 4138 struct irdma_qp *iwqp; 4139 4140 if (!cm_id) 4141 return; 4142 4143 iwqp = cm_id->provider_data; 4144 if (!iwqp) 4145 return; 4146 4147 ibdev_dbg(&cm_node->iwdev->ibdev, 4148 "CM: reset event %p - cm_id = %p\n", event->cm_node, cm_id); 4149 iwqp->cm_id = NULL; 4150 4151 irdma_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT, 4152 -ECONNRESET); 4153 irdma_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0); 4154 } 4155 4156 /** 4157 * irdma_cm_event_handler - send event to cm upper layer 4158 * @work: pointer of cm event info. 4159 */ 4160 static void irdma_cm_event_handler(struct work_struct *work) 4161 { 4162 struct irdma_cm_event *event = container_of(work, struct irdma_cm_event, event_work); 4163 struct irdma_cm_node *cm_node; 4164 4165 if (!event || !event->cm_node || !event->cm_node->cm_core) 4166 return; 4167 4168 cm_node = event->cm_node; 4169 trace_irdma_cm_event_handler(cm_node, event->type, NULL); 4170 4171 switch (event->type) { 4172 case IRDMA_CM_EVENT_MPA_REQ: 4173 irdma_send_cm_event(cm_node, cm_node->cm_id, 4174 IW_CM_EVENT_CONNECT_REQUEST, 0); 4175 break; 4176 case IRDMA_CM_EVENT_RESET: 4177 irdma_cm_event_reset(event); 4178 break; 4179 case IRDMA_CM_EVENT_CONNECTED: 4180 if (!event->cm_node->cm_id || 4181 event->cm_node->state != IRDMA_CM_STATE_OFFLOADED) 4182 break; 4183 irdma_cm_event_connected(event); 4184 break; 4185 case IRDMA_CM_EVENT_MPA_REJECT: 4186 if (!event->cm_node->cm_id || 4187 cm_node->state == IRDMA_CM_STATE_OFFLOADED) 4188 break; 4189 irdma_send_cm_event(cm_node, cm_node->cm_id, 4190 IW_CM_EVENT_CONNECT_REPLY, -ECONNREFUSED); 4191 break; 4192 case IRDMA_CM_EVENT_ABORTED: 4193 if (!event->cm_node->cm_id || 4194 event->cm_node->state == IRDMA_CM_STATE_OFFLOADED) 4195 break; 4196 irdma_event_connect_error(event); 4197 break; 4198 default: 4199 ibdev_dbg(&cm_node->iwdev->ibdev, 4200 "CM: bad event type = %d\n", event->type); 4201 break; 4202 } 4203 4204 irdma_rem_ref_cm_node(event->cm_node); 4205 kfree(event); 4206 } 4207 4208 /** 4209 * irdma_cm_post_event - queue event request for worker thread 4210 * @event: cm node's info for up event call 4211 */ 4212 static void irdma_cm_post_event(struct irdma_cm_event *event) 4213 { 4214 refcount_inc(&event->cm_node->refcnt); 4215 INIT_WORK(&event->event_work, irdma_cm_event_handler); 4216 queue_work(event->cm_node->cm_core->event_wq, &event->event_work); 4217 } 4218 4219 /** 4220 * irdma_cm_teardown_connections - teardown QPs 4221 * @iwdev: device pointer 4222 * @ipaddr: Pointer to IPv4 or IPv6 address 4223 * @nfo: Connection info 4224 * @disconnect_all: flag indicating disconnect all QPs 4225 * 4226 * teardown QPs where source or destination addr matches ip addr 4227 */ 4228 void irdma_cm_teardown_connections(struct irdma_device *iwdev, u32 *ipaddr, 4229 struct irdma_cm_info *nfo, 4230 bool disconnect_all) 4231 { 4232 struct irdma_cm_core *cm_core = &iwdev->cm_core; 4233 struct list_head *list_core_temp; 4234 struct list_head *list_node; 4235 struct irdma_cm_node *cm_node; 4236 struct list_head teardown_list; 4237 struct ib_qp_attr attr; 4238 4239 INIT_LIST_HEAD(&teardown_list); 4240 4241 rcu_read_lock(); 4242 irdma_teardown_list_prep(cm_core, &teardown_list, ipaddr, nfo, disconnect_all); 4243 rcu_read_unlock(); 4244 4245 list_for_each_safe (list_node, list_core_temp, &teardown_list) { 4246 cm_node = container_of(list_node, struct irdma_cm_node, 4247 teardown_entry); 4248 attr.qp_state = IB_QPS_ERR; 4249 irdma_modify_qp(&cm_node->iwqp->ibqp, &attr, IB_QP_STATE, NULL); 4250 if (iwdev->rf->reset) 4251 irdma_cm_disconn(cm_node->iwqp); 4252 irdma_rem_ref_cm_node(cm_node); 4253 } 4254 } 4255 4256 /** 4257 * irdma_qhash_ctrl - enable/disable qhash for list 4258 * @iwdev: device pointer 4259 * @parent_listen_node: parent listen node 4260 * @nfo: cm info node 4261 * @ipaddr: Pointer to IPv4 or IPv6 address 4262 * @ipv4: flag indicating IPv4 when true 4263 * @ifup: flag indicating interface up when true 4264 * 4265 * Enables or disables the qhash for the node in the child 4266 * listen list that matches ipaddr. If no matching IP was found 4267 * it will allocate and add a new child listen node to the 4268 * parent listen node. The listen_list_lock is assumed to be 4269 * held when called. 4270 */ 4271 static void irdma_qhash_ctrl(struct irdma_device *iwdev, 4272 struct irdma_cm_listener *parent_listen_node, 4273 struct irdma_cm_info *nfo, u32 *ipaddr, bool ipv4, 4274 bool ifup) 4275 { 4276 struct list_head *child_listen_list = &parent_listen_node->child_listen_list; 4277 struct irdma_cm_listener *child_listen_node; 4278 struct list_head *pos, *tpos; 4279 bool node_allocated = false; 4280 enum irdma_quad_hash_manage_type op = ifup ? 4281 IRDMA_QHASH_MANAGE_TYPE_ADD : 4282 IRDMA_QHASH_MANAGE_TYPE_DELETE; 4283 int err; 4284 4285 list_for_each_safe (pos, tpos, child_listen_list) { 4286 child_listen_node = list_entry(pos, struct irdma_cm_listener, 4287 child_listen_list); 4288 if (!memcmp(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16)) 4289 goto set_qhash; 4290 } 4291 4292 /* if not found then add a child listener if interface is going up */ 4293 if (!ifup) 4294 return; 4295 child_listen_node = kmemdup(parent_listen_node, 4296 sizeof(*child_listen_node), GFP_ATOMIC); 4297 if (!child_listen_node) 4298 return; 4299 4300 node_allocated = true; 4301 memcpy(child_listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16); 4302 4303 set_qhash: 4304 memcpy(nfo->loc_addr, child_listen_node->loc_addr, 4305 sizeof(nfo->loc_addr)); 4306 nfo->vlan_id = child_listen_node->vlan_id; 4307 err = irdma_manage_qhash(iwdev, nfo, IRDMA_QHASH_TYPE_TCP_SYN, op, NULL, 4308 false); 4309 if (!err) { 4310 child_listen_node->qhash_set = ifup; 4311 if (node_allocated) 4312 list_add(&child_listen_node->child_listen_list, 4313 &parent_listen_node->child_listen_list); 4314 } else if (node_allocated) { 4315 kfree(child_listen_node); 4316 } 4317 } 4318 4319 /** 4320 * irdma_if_notify - process an ifdown on an interface 4321 * @iwdev: device pointer 4322 * @netdev: network device structure 4323 * @ipaddr: Pointer to IPv4 or IPv6 address 4324 * @ipv4: flag indicating IPv4 when true 4325 * @ifup: flag indicating interface up when true 4326 */ 4327 void irdma_if_notify(struct irdma_device *iwdev, struct net_device *netdev, 4328 u32 *ipaddr, bool ipv4, bool ifup) 4329 { 4330 struct irdma_cm_core *cm_core = &iwdev->cm_core; 4331 unsigned long flags; 4332 struct irdma_cm_listener *listen_node; 4333 static const u32 ip_zero[4] = { 0, 0, 0, 0 }; 4334 struct irdma_cm_info nfo = {}; 4335 u16 vlan_id = rdma_vlan_dev_vlan_id(netdev); 4336 enum irdma_quad_hash_manage_type op = ifup ? 4337 IRDMA_QHASH_MANAGE_TYPE_ADD : 4338 IRDMA_QHASH_MANAGE_TYPE_DELETE; 4339 4340 nfo.vlan_id = vlan_id; 4341 nfo.ipv4 = ipv4; 4342 nfo.qh_qpid = 1; 4343 4344 /* Disable or enable qhash for listeners */ 4345 spin_lock_irqsave(&cm_core->listen_list_lock, flags); 4346 list_for_each_entry (listen_node, &cm_core->listen_list, list) { 4347 if (vlan_id != listen_node->vlan_id || 4348 (memcmp(listen_node->loc_addr, ipaddr, ipv4 ? 4 : 16) && 4349 memcmp(listen_node->loc_addr, ip_zero, ipv4 ? 4 : 16))) 4350 continue; 4351 4352 memcpy(nfo.loc_addr, listen_node->loc_addr, 4353 sizeof(nfo.loc_addr)); 4354 nfo.loc_port = listen_node->loc_port; 4355 nfo.user_pri = listen_node->user_pri; 4356 if (!list_empty(&listen_node->child_listen_list)) { 4357 irdma_qhash_ctrl(iwdev, listen_node, &nfo, ipaddr, ipv4, 4358 ifup); 4359 } else if (memcmp(listen_node->loc_addr, ip_zero, 4360 ipv4 ? 4 : 16)) { 4361 if (!irdma_manage_qhash(iwdev, &nfo, 4362 IRDMA_QHASH_TYPE_TCP_SYN, op, 4363 NULL, false)) 4364 listen_node->qhash_set = ifup; 4365 } 4366 } 4367 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); 4368 4369 /* disconnect any connected qp's on ifdown */ 4370 if (!ifup) 4371 irdma_cm_teardown_connections(iwdev, ipaddr, &nfo, false); 4372 } 4373