1 /*- 2 * SPDX-License-Identifier: GPL-2.0 or Linux-OpenIB 3 * 4 * Copyright (c) 2015 - 2022 Intel Corporation 5 * 6 * This software is available to you under a choice of one of two 7 * licenses. You may choose to be licensed under the terms of the GNU 8 * General Public License (GPL) Version 2, available from the file 9 * COPYING in the main directory of this source tree, or the 10 * OpenFabrics.org BSD license below: 11 * 12 * Redistribution and use in source and binary forms, with or 13 * without modification, are permitted provided that the following 14 * conditions are met: 15 * 16 * - Redistributions of source code must retain the above 17 * copyright notice, this list of conditions and the following 18 * disclaimer. 19 * 20 * - Redistributions in binary form must reproduce the above 21 * copyright notice, this list of conditions and the following 22 * disclaimer in the documentation and/or other materials 23 * provided with the distribution. 24 * 25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 32 * SOFTWARE. 33 */ 34 /*$FreeBSD$*/ 35 36 #include "irdma_main.h" 37 38 static void irdma_cm_post_event(struct irdma_cm_event *event); 39 static void irdma_disconnect_worker(struct work_struct *work); 40 41 /** 42 * irdma_free_sqbuf - put back puda buffer if refcount is 0 43 * @vsi: The VSI structure of the device 44 * @bufp: puda buffer to free 45 */ 46 void 47 irdma_free_sqbuf(struct irdma_sc_vsi *vsi, void *bufp) 48 { 49 struct irdma_puda_buf *buf = bufp; 50 struct irdma_puda_rsrc *ilq = vsi->ilq; 51 52 if (atomic_dec_and_test(&buf->refcount)) 53 irdma_puda_ret_bufpool(ilq, buf); 54 } 55 56 /** 57 * irdma_record_ird_ord - Record IRD/ORD passed in 58 * @cm_node: connection's node 59 * @conn_ird: connection IRD 60 * @conn_ord: connection ORD 61 */ 62 static void 63 irdma_record_ird_ord(struct irdma_cm_node *cm_node, u32 conn_ird, 64 u32 conn_ord) 65 { 66 if (conn_ird > cm_node->dev->hw_attrs.max_hw_ird) 67 conn_ird = cm_node->dev->hw_attrs.max_hw_ird; 68 69 if (conn_ord > cm_node->dev->hw_attrs.max_hw_ord) 70 conn_ord = cm_node->dev->hw_attrs.max_hw_ord; 71 else if (!conn_ord && cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO) 72 conn_ord = 1; 73 cm_node->ird_size = conn_ird; 74 cm_node->ord_size = conn_ord; 75 } 76 77 /** 78 * irdma_copy_ip_ntohl - copy IP address from network to host 79 * @dst: IP address in host order 80 * @src: IP address in network order (big endian) 81 */ 82 void 83 irdma_copy_ip_ntohl(u32 *dst, __be32 *src) 84 { 85 *dst++ = ntohl(*src++); 86 *dst++ = ntohl(*src++); 87 *dst++ = ntohl(*src++); 88 *dst = ntohl(*src); 89 } 90 91 /** 92 * irdma_copy_ip_htonl - copy IP address from host to network order 93 * @dst: IP address in network order (big endian) 94 * @src: IP address in host order 95 */ 96 void 97 irdma_copy_ip_htonl(__be32 *dst, u32 *src) 98 { 99 *dst++ = htonl(*src++); 100 *dst++ = htonl(*src++); 101 *dst++ = htonl(*src++); 102 *dst = htonl(*src); 103 } 104 105 /** 106 * irdma_get_addr_info 107 * @cm_node: contains ip/tcp info 108 * @cm_info: to get a copy of the cm_node ip/tcp info 109 */ 110 static void 111 irdma_get_addr_info(struct irdma_cm_node *cm_node, 112 struct irdma_cm_info *cm_info) 113 { 114 memset(cm_info, 0, sizeof(*cm_info)); 115 cm_info->ipv4 = cm_node->ipv4; 116 cm_info->vlan_id = cm_node->vlan_id; 117 memcpy(cm_info->loc_addr, cm_node->loc_addr, sizeof(cm_info->loc_addr)); 118 memcpy(cm_info->rem_addr, cm_node->rem_addr, sizeof(cm_info->rem_addr)); 119 cm_info->loc_port = cm_node->loc_port; 120 cm_info->rem_port = cm_node->rem_port; 121 } 122 123 /** 124 * irdma_fill_sockaddr4 - fill in addr info for IPv4 connection 125 * @cm_node: connection's node 126 * @event: upper layer's cm event 127 */ 128 static inline void 129 irdma_fill_sockaddr4(struct irdma_cm_node *cm_node, 130 struct iw_cm_event *event) 131 { 132 struct sockaddr_in *laddr = (struct sockaddr_in *)&event->local_addr; 133 struct sockaddr_in *raddr = (struct sockaddr_in *)&event->remote_addr; 134 135 laddr->sin_family = AF_INET; 136 raddr->sin_family = AF_INET; 137 138 laddr->sin_port = htons(cm_node->loc_port); 139 raddr->sin_port = htons(cm_node->rem_port); 140 141 laddr->sin_addr.s_addr = htonl(cm_node->loc_addr[0]); 142 raddr->sin_addr.s_addr = htonl(cm_node->rem_addr[0]); 143 } 144 145 /** 146 * irdma_fill_sockaddr6 - fill in addr info for IPv6 connection 147 * @cm_node: connection's node 148 * @event: upper layer's cm event 149 */ 150 static inline void 151 irdma_fill_sockaddr6(struct irdma_cm_node *cm_node, 152 struct iw_cm_event *event) 153 { 154 struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)&event->local_addr; 155 struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)&event->remote_addr; 156 157 laddr6->sin6_family = AF_INET6; 158 raddr6->sin6_family = AF_INET6; 159 160 laddr6->sin6_port = htons(cm_node->loc_port); 161 raddr6->sin6_port = htons(cm_node->rem_port); 162 163 irdma_copy_ip_htonl(laddr6->sin6_addr.__u6_addr.__u6_addr32, 164 cm_node->loc_addr); 165 irdma_copy_ip_htonl(raddr6->sin6_addr.__u6_addr.__u6_addr32, 166 cm_node->rem_addr); 167 } 168 169 /** 170 * irdma_get_cmevent_info - for cm event upcall 171 * @cm_node: connection's node 172 * @cm_id: upper layers cm struct for the event 173 * @event: upper layer's cm event 174 */ 175 static inline void 176 irdma_get_cmevent_info(struct irdma_cm_node *cm_node, 177 struct iw_cm_id *cm_id, 178 struct iw_cm_event *event) 179 { 180 memcpy(&event->local_addr, &cm_id->m_local_addr, 181 sizeof(event->local_addr)); 182 memcpy(&event->remote_addr, &cm_id->m_remote_addr, 183 sizeof(event->remote_addr)); 184 if (cm_node) { 185 event->private_data = cm_node->pdata_buf; 186 event->private_data_len = (u8)cm_node->pdata.size; 187 event->ird = cm_node->ird_size; 188 event->ord = cm_node->ord_size; 189 } 190 } 191 192 /** 193 * irdma_send_cm_event - upcall cm's event handler 194 * @cm_node: connection's node 195 * @cm_id: upper layer's cm info struct 196 * @type: Event type to indicate 197 * @status: status for the event type 198 */ 199 static int 200 irdma_send_cm_event(struct irdma_cm_node *cm_node, 201 struct iw_cm_id *cm_id, 202 enum iw_cm_event_type type, int status) 203 { 204 struct iw_cm_event event = {0}; 205 206 event.event = type; 207 event.status = status; 208 209 irdma_debug(iwdev_to_idev(cm_node->iwdev), IRDMA_DEBUG_CM, 210 "cm_node %p cm_id=%p state=%d accel=%d event_type=%d status=%d\n", 211 cm_node, cm_id, cm_node->accelerated, cm_node->state, type, status); 212 213 switch (type) { 214 case IW_CM_EVENT_CONNECT_REQUEST: 215 if (cm_node->ipv4) 216 irdma_fill_sockaddr4(cm_node, &event); 217 else 218 irdma_fill_sockaddr6(cm_node, &event); 219 event.provider_data = cm_node; 220 event.private_data = cm_node->pdata_buf; 221 event.private_data_len = (u8)cm_node->pdata.size; 222 event.ird = cm_node->ird_size; 223 break; 224 case IW_CM_EVENT_CONNECT_REPLY: 225 irdma_get_cmevent_info(cm_node, cm_id, &event); 226 break; 227 case IW_CM_EVENT_ESTABLISHED: 228 event.ird = cm_node->ird_size; 229 event.ord = cm_node->ord_size; 230 break; 231 case IW_CM_EVENT_DISCONNECT: 232 case IW_CM_EVENT_CLOSE: 233 /* Wait if we are in RTS but havent issued the iwcm event upcall */ 234 if (!cm_node->accelerated) 235 wait_for_completion(&cm_node->establish_comp); 236 break; 237 default: 238 return -EINVAL; 239 } 240 241 return cm_id->event_handler(cm_id, &event); 242 } 243 244 /** 245 * irdma_timer_list_prep - add connection nodes to a list to perform timer tasks 246 * @cm_core: cm's core 247 * @timer_list: a timer list to which cm_node will be selected 248 */ 249 static void 250 irdma_timer_list_prep(struct irdma_cm_core *cm_core, 251 struct list_head *timer_list) 252 { 253 struct irdma_cm_node *cm_node; 254 int bkt; 255 256 HASH_FOR_EACH_RCU(cm_core->cm_hash_tbl, bkt, cm_node, list) { 257 if ((cm_node->close_entry || cm_node->send_entry) && 258 atomic_inc_not_zero(&cm_node->refcnt)) 259 list_add(&cm_node->timer_entry, timer_list); 260 } 261 } 262 263 /** 264 * irdma_create_event - create cm event 265 * @cm_node: connection's node 266 * @type: Event type to generate 267 */ 268 static struct irdma_cm_event * 269 irdma_create_event(struct irdma_cm_node *cm_node, 270 enum irdma_cm_event_type type) 271 { 272 struct irdma_cm_event *event; 273 274 if (!cm_node->cm_id) 275 return NULL; 276 277 event = kzalloc(sizeof(*event), GFP_ATOMIC); 278 279 if (!event) 280 return NULL; 281 282 event->type = type; 283 event->cm_node = cm_node; 284 memcpy(event->cm_info.rem_addr, cm_node->rem_addr, 285 sizeof(event->cm_info.rem_addr)); 286 memcpy(event->cm_info.loc_addr, cm_node->loc_addr, 287 sizeof(event->cm_info.loc_addr)); 288 event->cm_info.rem_port = cm_node->rem_port; 289 event->cm_info.loc_port = cm_node->loc_port; 290 event->cm_info.cm_id = cm_node->cm_id; 291 irdma_debug(iwdev_to_idev(cm_node->iwdev), IRDMA_DEBUG_CM, 292 "node=%p event=%p type=%u dst=%pI4 src=%pI4\n", cm_node, 293 event, type, event->cm_info.loc_addr, 294 event->cm_info.rem_addr); 295 irdma_cm_post_event(event); 296 297 return event; 298 } 299 300 /** 301 * irdma_free_retrans_entry - free send entry 302 * @cm_node: connection's node 303 */ 304 static void 305 irdma_free_retrans_entry(struct irdma_cm_node *cm_node) 306 { 307 struct irdma_device *iwdev = cm_node->iwdev; 308 struct irdma_timer_entry *send_entry; 309 310 send_entry = cm_node->send_entry; 311 if (!send_entry) 312 return; 313 314 cm_node->send_entry = NULL; 315 irdma_free_sqbuf(&iwdev->vsi, send_entry->sqbuf); 316 kfree(send_entry); 317 atomic_dec(&cm_node->refcnt); 318 } 319 320 /** 321 * irdma_cleanup_retrans_entry - free send entry with lock 322 * @cm_node: connection's node 323 */ 324 static void 325 irdma_cleanup_retrans_entry(struct irdma_cm_node *cm_node) 326 { 327 unsigned long flags; 328 329 spin_lock_irqsave(&cm_node->retrans_list_lock, flags); 330 irdma_free_retrans_entry(cm_node); 331 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); 332 } 333 334 /** 335 * irdma_form_ah_cm_frame - get a free packet and build frame with address handle 336 * @cm_node: connection's node ionfo to use in frame 337 * @options: pointer to options info 338 * @hdr: pointer mpa header 339 * @pdata: pointer to private data 340 * @flags: indicates FIN or ACK 341 */ 342 static struct irdma_puda_buf * 343 irdma_form_ah_cm_frame(struct irdma_cm_node *cm_node, 344 struct irdma_kmem_info *options, 345 struct irdma_kmem_info *hdr, 346 struct irdma_mpa_priv_info *pdata, 347 u8 flags) 348 { 349 struct irdma_puda_buf *sqbuf; 350 struct irdma_sc_vsi *vsi = &cm_node->iwdev->vsi; 351 u8 *buf; 352 struct tcphdr *tcph; 353 u16 pktsize; 354 u32 opts_len = 0; 355 u32 pd_len = 0; 356 u32 hdr_len = 0; 357 358 if (!cm_node->ah || !cm_node->ah->ah_info.ah_valid) { 359 irdma_debug(iwdev_to_idev(cm_node->iwdev), IRDMA_DEBUG_CM, 360 "AH invalid\n"); 361 return NULL; 362 } 363 364 sqbuf = irdma_puda_get_bufpool(vsi->ilq); 365 if (!sqbuf) { 366 irdma_debug(iwdev_to_idev(cm_node->iwdev), IRDMA_DEBUG_CM, 367 "SQ buf NULL\n"); 368 return NULL; 369 } 370 371 sqbuf->ah_id = cm_node->ah->ah_info.ah_idx; 372 buf = sqbuf->mem.va; 373 if (options) 374 opts_len = (u32)options->size; 375 376 if (hdr) 377 hdr_len = hdr->size; 378 379 if (pdata) 380 pd_len = pdata->size; 381 382 pktsize = sizeof(*tcph) + opts_len + hdr_len + pd_len; 383 384 memset(buf, 0, pktsize); 385 386 sqbuf->totallen = pktsize; 387 sqbuf->tcphlen = sizeof(*tcph) + opts_len; 388 sqbuf->scratch = cm_node; 389 390 tcph = (struct tcphdr *)buf; 391 buf += sizeof(*tcph); 392 393 tcph->th_sport = htons(cm_node->loc_port); 394 tcph->th_dport = htons(cm_node->rem_port); 395 tcph->th_seq = htonl(cm_node->tcp_cntxt.loc_seq_num); 396 397 if (flags & SET_ACK) { 398 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt; 399 tcph->th_ack = htonl(cm_node->tcp_cntxt.loc_ack_num); 400 tcph->th_flags |= TH_ACK; 401 } else { 402 tcph->th_ack = 0; 403 } 404 405 if (flags & SET_SYN) { 406 cm_node->tcp_cntxt.loc_seq_num++; 407 tcph->th_flags |= TH_SYN; 408 } else { 409 cm_node->tcp_cntxt.loc_seq_num += hdr_len + pd_len; 410 } 411 412 if (flags & SET_FIN) { 413 cm_node->tcp_cntxt.loc_seq_num++; 414 tcph->th_flags |= TH_FIN; 415 } 416 417 if (flags & SET_RST) 418 tcph->th_flags |= TH_RST; 419 420 tcph->th_off = (u16)((sizeof(*tcph) + opts_len + 3) >> 2); 421 sqbuf->tcphlen = tcph->th_off << 2; 422 tcph->th_win = htons(cm_node->tcp_cntxt.rcv_wnd); 423 tcph->th_urp = 0; 424 425 if (opts_len) { 426 memcpy(buf, options->addr, opts_len); 427 buf += opts_len; 428 } 429 430 if (hdr_len) { 431 memcpy(buf, hdr->addr, hdr_len); 432 buf += hdr_len; 433 } 434 435 if (pdata && pdata->addr) 436 memcpy(buf, pdata->addr, pdata->size); 437 438 atomic_set(&sqbuf->refcount, 1); 439 440 irdma_debug_buf(vsi->dev, IRDMA_DEBUG_ILQ, "TRANSMIT ILQ BUFFER", 441 sqbuf->mem.va, sqbuf->totallen); 442 443 return sqbuf; 444 } 445 446 /** 447 * irdma_form_uda_cm_frame - get a free packet and build frame full tcpip packet 448 * @cm_node: connection's node ionfo to use in frame 449 * @options: pointer to options info 450 * @hdr: pointer mpa header 451 * @pdata: pointer to private data 452 * @flags: indicates FIN or ACK 453 */ 454 static struct irdma_puda_buf * 455 irdma_form_uda_cm_frame(struct irdma_cm_node *cm_node, 456 struct irdma_kmem_info *options, 457 struct irdma_kmem_info *hdr, 458 struct irdma_mpa_priv_info *pdata, 459 u8 flags) 460 { 461 struct irdma_puda_buf *sqbuf; 462 struct irdma_sc_vsi *vsi = &cm_node->iwdev->vsi; 463 u8 *buf; 464 465 struct tcphdr *tcph; 466 struct ip *iph; 467 struct ip6_hdr *ip6h; 468 struct ether_header *ethh; 469 u16 pktsize; 470 u16 eth_hlen = ETH_HLEN; 471 u32 opts_len = 0; 472 u32 pd_len = 0; 473 u32 hdr_len = 0; 474 475 u16 vtag; 476 477 sqbuf = irdma_puda_get_bufpool(vsi->ilq); 478 if (!sqbuf) 479 return NULL; 480 481 buf = sqbuf->mem.va; 482 483 if (options) 484 opts_len = (u32)options->size; 485 486 if (hdr) 487 hdr_len = hdr->size; 488 489 if (pdata) 490 pd_len = pdata->size; 491 492 if (cm_node->vlan_id < VLAN_N_VID) 493 eth_hlen += 4; 494 495 if (cm_node->ipv4) 496 pktsize = sizeof(*iph) + sizeof(*tcph); 497 else 498 pktsize = sizeof(*ip6h) + sizeof(*tcph); 499 pktsize += opts_len + hdr_len + pd_len; 500 501 memset(buf, 0, eth_hlen + pktsize); 502 503 sqbuf->totallen = pktsize + eth_hlen; 504 sqbuf->maclen = eth_hlen; 505 sqbuf->tcphlen = sizeof(*tcph) + opts_len; 506 sqbuf->scratch = cm_node; 507 508 ethh = (struct ether_header *)buf; 509 buf += eth_hlen; 510 511 if (cm_node->do_lpb) 512 sqbuf->do_lpb = true; 513 514 if (cm_node->ipv4) { 515 sqbuf->ipv4 = true; 516 517 iph = (struct ip *)buf; 518 buf += sizeof(*iph); 519 tcph = (struct tcphdr *)buf; 520 buf += sizeof(*tcph); 521 522 ether_addr_copy(ethh->ether_dhost, cm_node->rem_mac); 523 ether_addr_copy(ethh->ether_shost, cm_node->loc_mac); 524 if (cm_node->vlan_id < VLAN_N_VID) { 525 ((struct ether_vlan_header *)ethh)->evl_proto = 526 htons(ETH_P_8021Q); 527 vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) | 528 cm_node->vlan_id; 529 ((struct ether_vlan_header *)ethh)->evl_tag = htons(vtag); 530 531 ((struct ether_vlan_header *)ethh)->evl_encap_proto = 532 htons(ETH_P_IP); 533 } else { 534 ethh->ether_type = htons(ETH_P_IP); 535 } 536 537 iph->ip_v = IPVERSION; 538 iph->ip_hl = 5; /* 5 * 4Byte words, IP headr len */ 539 iph->ip_tos = cm_node->tos; 540 iph->ip_len = htons(pktsize); 541 iph->ip_id = htons(++cm_node->tcp_cntxt.loc_id); 542 543 iph->ip_off = htons(0x4000); 544 iph->ip_ttl = 0x40; 545 iph->ip_p = IPPROTO_TCP; 546 iph->ip_src.s_addr = htonl(cm_node->loc_addr[0]); 547 iph->ip_dst.s_addr = htonl(cm_node->rem_addr[0]); 548 } else { 549 sqbuf->ipv4 = false; 550 ip6h = (struct ip6_hdr *)buf; 551 buf += sizeof(*ip6h); 552 tcph = (struct tcphdr *)buf; 553 buf += sizeof(*tcph); 554 555 ether_addr_copy(ethh->ether_dhost, cm_node->rem_mac); 556 ether_addr_copy(ethh->ether_shost, cm_node->loc_mac); 557 if (cm_node->vlan_id < VLAN_N_VID) { 558 ((struct ether_vlan_header *)ethh)->evl_proto = 559 htons(ETH_P_8021Q); 560 vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) | 561 cm_node->vlan_id; 562 ((struct ether_vlan_header *)ethh)->evl_tag = htons(vtag); 563 ((struct ether_vlan_header *)ethh)->evl_encap_proto = 564 htons(ETH_P_IPV6); 565 } else { 566 ethh->ether_type = htons(ETH_P_IPV6); 567 } 568 ip6h->ip6_vfc = 6 << 4; 569 ip6h->ip6_vfc |= cm_node->tos >> 4; 570 ip6h->ip6_flow = cm_node->tos << 20; 571 ip6h->ip6_plen = htons(pktsize - sizeof(*ip6h)); 572 ip6h->ip6_nxt = 6; 573 ip6h->ip6_hops = 128; 574 irdma_copy_ip_htonl(ip6h->ip6_src.__u6_addr.__u6_addr32, 575 cm_node->loc_addr); 576 irdma_copy_ip_htonl(ip6h->ip6_dst.__u6_addr.__u6_addr32, 577 cm_node->rem_addr); 578 } 579 580 tcph->th_sport = htons(cm_node->loc_port); 581 tcph->th_dport = htons(cm_node->rem_port); 582 tcph->th_seq = htonl(cm_node->tcp_cntxt.loc_seq_num); 583 584 if (flags & SET_ACK) { 585 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt; 586 tcph->th_ack = htonl(cm_node->tcp_cntxt.loc_ack_num); 587 tcph->th_flags |= TH_ACK; 588 } else { 589 tcph->th_ack = 0; 590 } 591 592 if (flags & SET_SYN) { 593 cm_node->tcp_cntxt.loc_seq_num++; 594 tcph->th_flags |= TH_SYN; 595 } else { 596 cm_node->tcp_cntxt.loc_seq_num += hdr_len + pd_len; 597 } 598 599 if (flags & SET_FIN) { 600 cm_node->tcp_cntxt.loc_seq_num++; 601 tcph->th_flags |= TH_FIN; 602 } 603 604 if (flags & SET_RST) 605 tcph->th_flags |= TH_RST; 606 607 tcph->th_off = (u16)((sizeof(*tcph) + opts_len + 3) >> 2); 608 sqbuf->tcphlen = tcph->th_off << 2; 609 tcph->th_win = htons(cm_node->tcp_cntxt.rcv_wnd); 610 tcph->th_urp = 0; 611 612 if (opts_len) { 613 memcpy(buf, options->addr, opts_len); 614 buf += opts_len; 615 } 616 617 if (hdr_len) { 618 memcpy(buf, hdr->addr, hdr_len); 619 buf += hdr_len; 620 } 621 622 if (pdata && pdata->addr) 623 memcpy(buf, pdata->addr, pdata->size); 624 625 atomic_set(&sqbuf->refcount, 1); 626 627 irdma_debug_buf(vsi->dev, IRDMA_DEBUG_ILQ, "TRANSMIT ILQ BUFFER", 628 sqbuf->mem.va, sqbuf->totallen); 629 630 return sqbuf; 631 } 632 633 /** 634 * irdma_send_reset - Send RST packet 635 * @cm_node: connection's node 636 */ 637 int 638 irdma_send_reset(struct irdma_cm_node *cm_node) 639 { 640 struct irdma_puda_buf *sqbuf; 641 int flags = SET_RST | SET_ACK; 642 643 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, NULL, NULL, 644 flags); 645 if (!sqbuf) 646 return -ENOMEM; 647 648 irdma_debug(iwdev_to_idev(cm_node->iwdev), IRDMA_DEBUG_CM, 649 "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", 650 __builtin_return_address(0), cm_node, cm_node->cm_id, 651 cm_node->accelerated, cm_node->state, cm_node->rem_port, 652 cm_node->loc_port, cm_node->rem_addr, cm_node->loc_addr); 653 654 return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 0, 655 1); 656 } 657 658 /** 659 * irdma_active_open_err - send event for active side cm error 660 * @cm_node: connection's node 661 * @reset: Flag to send reset or not 662 */ 663 static void 664 irdma_active_open_err(struct irdma_cm_node *cm_node, bool reset) 665 { 666 irdma_cleanup_retrans_entry(cm_node); 667 cm_node->cm_core->stats_connect_errs++; 668 if (reset) { 669 irdma_debug(iwdev_to_idev(cm_node->iwdev), IRDMA_DEBUG_CM, 670 "cm_node=%p state=%d\n", cm_node, cm_node->state); 671 atomic_inc(&cm_node->refcnt); 672 irdma_send_reset(cm_node); 673 } 674 675 cm_node->state = IRDMA_CM_STATE_CLOSED; 676 irdma_create_event(cm_node, IRDMA_CM_EVENT_ABORTED); 677 } 678 679 /** 680 * irdma_passive_open_err - handle passive side cm error 681 * @cm_node: connection's node 682 * @reset: send reset or just free cm_node 683 */ 684 static void 685 irdma_passive_open_err(struct irdma_cm_node *cm_node, bool reset) 686 { 687 irdma_cleanup_retrans_entry(cm_node); 688 cm_node->cm_core->stats_passive_errs++; 689 cm_node->state = IRDMA_CM_STATE_CLOSED; 690 irdma_debug(iwdev_to_idev(cm_node->iwdev), IRDMA_DEBUG_CM, 691 "cm_node=%p state =%d\n", cm_node, cm_node->state); 692 if (reset) 693 irdma_send_reset(cm_node); 694 else 695 irdma_rem_ref_cm_node(cm_node); 696 } 697 698 /** 699 * irdma_event_connect_error - to create connect error event 700 * @event: cm information for connect event 701 */ 702 static void 703 irdma_event_connect_error(struct irdma_cm_event *event) 704 { 705 struct irdma_qp *iwqp; 706 struct iw_cm_id *cm_id; 707 708 cm_id = event->cm_node->cm_id; 709 if (!cm_id) 710 return; 711 712 iwqp = cm_id->provider_data; 713 714 if (!iwqp || !iwqp->iwdev) 715 return; 716 717 iwqp->cm_id = NULL; 718 cm_id->provider_data = NULL; 719 irdma_send_cm_event(event->cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 720 -ECONNRESET); 721 irdma_rem_ref_cm_node(event->cm_node); 722 } 723 724 /** 725 * irdma_process_options - process options from TCP header 726 * @cm_node: connection's node 727 * @optionsloc: point to start of options 728 * @optionsize: size of all options 729 * @syn_pkt: flag if syn packet 730 */ 731 static int 732 irdma_process_options(struct irdma_cm_node *cm_node, u8 *optionsloc, 733 u32 optionsize, u32 syn_pkt) 734 { 735 u32 tmp; 736 u32 offset = 0; 737 union all_known_options *all_options; 738 char got_mss_option = 0; 739 740 while (offset < optionsize) { 741 all_options = (union all_known_options *)(optionsloc + offset); 742 switch (all_options->base.optionnum) { 743 case OPTION_NUM_EOL: 744 offset = optionsize; 745 break; 746 case OPTION_NUM_NONE: 747 offset += 1; 748 continue; 749 case OPTION_NUM_MSS: 750 irdma_debug(iwdev_to_idev(cm_node->iwdev), 751 IRDMA_DEBUG_CM, 752 "MSS Length: %d Offset: %d Size: %d\n", 753 all_options->mss.len, offset, optionsize); 754 got_mss_option = 1; 755 if (all_options->mss.len != 4) 756 return -EINVAL; 757 tmp = ntohs(all_options->mss.mss); 758 if ((cm_node->ipv4 && 759 (tmp + IRDMA_MTU_TO_MSS_IPV4) < IRDMA_MIN_MTU_IPV4) || 760 (!cm_node->ipv4 && 761 (tmp + IRDMA_MTU_TO_MSS_IPV6) < IRDMA_MIN_MTU_IPV6)) 762 return -EINVAL; 763 if (tmp < cm_node->tcp_cntxt.mss) 764 cm_node->tcp_cntxt.mss = tmp; 765 break; 766 case OPTION_NUM_WINDOW_SCALE: 767 cm_node->tcp_cntxt.snd_wscale = 768 all_options->windowscale.shiftcount; 769 break; 770 default: 771 irdma_debug(iwdev_to_idev(cm_node->iwdev), 772 IRDMA_DEBUG_CM, 773 "Unsupported TCP Option: %x\n", 774 all_options->base.optionnum); 775 break; 776 } 777 offset += all_options->base.len; 778 } 779 if (!got_mss_option && syn_pkt) 780 cm_node->tcp_cntxt.mss = IRDMA_CM_DEFAULT_MSS; 781 782 return 0; 783 } 784 785 /** 786 * irdma_handle_tcp_options - setup TCP context info after parsing TCP options 787 * @cm_node: connection's node 788 * @tcph: pointer tcp header 789 * @optionsize: size of options rcvd 790 * @passive: active or passive flag 791 */ 792 static int 793 irdma_handle_tcp_options(struct irdma_cm_node *cm_node, 794 struct tcphdr *tcph, int optionsize, 795 int passive) 796 { 797 u8 *optionsloc = (u8 *)&tcph[1]; 798 int ret; 799 800 if (optionsize) { 801 ret = irdma_process_options(cm_node, optionsloc, optionsize, 802 (u32)tcph->th_flags & TH_SYN); 803 if (ret) { 804 irdma_debug(iwdev_to_idev(cm_node->iwdev), 805 IRDMA_DEBUG_CM, 806 "Node %p, Sending Reset\n", cm_node); 807 if (passive) 808 irdma_passive_open_err(cm_node, true); 809 else 810 irdma_active_open_err(cm_node, true); 811 return ret; 812 } 813 } 814 815 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->th_win) 816 << cm_node->tcp_cntxt.snd_wscale; 817 818 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd) 819 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd; 820 821 return 0; 822 } 823 824 /** 825 * irdma_build_mpa_v1 - build a MPA V1 frame 826 * @cm_node: connection's node 827 * @start_addr: address where to build frame 828 * @mpa_key: to do read0 or write0 829 */ 830 static void 831 irdma_build_mpa_v1(struct irdma_cm_node *cm_node, void *start_addr, 832 u8 mpa_key) 833 { 834 struct ietf_mpa_v1 *mpa_frame = start_addr; 835 836 switch (mpa_key) { 837 case MPA_KEY_REQUEST: 838 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE); 839 break; 840 case MPA_KEY_REPLY: 841 memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE); 842 break; 843 default: 844 break; 845 } 846 mpa_frame->flags = IETF_MPA_FLAGS_CRC; 847 mpa_frame->rev = cm_node->mpa_frame_rev; 848 mpa_frame->priv_data_len = htons(cm_node->pdata.size); 849 } 850 851 /** 852 * irdma_build_mpa_v2 - build a MPA V2 frame 853 * @cm_node: connection's node 854 * @start_addr: buffer start address 855 * @mpa_key: to do read0 or write0 856 */ 857 static void 858 irdma_build_mpa_v2(struct irdma_cm_node *cm_node, void *start_addr, 859 u8 mpa_key) 860 { 861 struct ietf_mpa_v2 *mpa_frame = start_addr; 862 struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg; 863 u16 ctrl_ird, ctrl_ord; 864 865 /* initialize the upper 5 bytes of the frame */ 866 irdma_build_mpa_v1(cm_node, start_addr, mpa_key); 867 mpa_frame->flags |= IETF_MPA_V2_FLAG; 868 if (cm_node->iwdev->iw_ooo) { 869 mpa_frame->flags |= IETF_MPA_FLAGS_MARKERS; 870 cm_node->rcv_mark_en = true; 871 } 872 mpa_frame->priv_data_len = cpu_to_be16(be16_to_cpu(mpa_frame->priv_data_len) + 873 IETF_RTR_MSG_SIZE); 874 875 /* initialize RTR msg */ 876 if (cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) { 877 ctrl_ird = IETF_NO_IRD_ORD; 878 ctrl_ord = IETF_NO_IRD_ORD; 879 } else { 880 ctrl_ird = (cm_node->ird_size > IETF_NO_IRD_ORD) ? 881 IETF_NO_IRD_ORD : 882 cm_node->ird_size; 883 ctrl_ord = (cm_node->ord_size > IETF_NO_IRD_ORD) ? 884 IETF_NO_IRD_ORD : 885 cm_node->ord_size; 886 } 887 ctrl_ird |= IETF_PEER_TO_PEER; 888 889 switch (mpa_key) { 890 case MPA_KEY_REQUEST: 891 ctrl_ord |= IETF_RDMA0_WRITE; 892 ctrl_ord |= IETF_RDMA0_READ; 893 break; 894 case MPA_KEY_REPLY: 895 switch (cm_node->send_rdma0_op) { 896 case SEND_RDMA_WRITE_ZERO: 897 ctrl_ord |= IETF_RDMA0_WRITE; 898 break; 899 case SEND_RDMA_READ_ZERO: 900 ctrl_ord |= IETF_RDMA0_READ; 901 break; 902 } 903 break; 904 default: 905 break; 906 } 907 rtr_msg->ctrl_ird = htons(ctrl_ird); 908 rtr_msg->ctrl_ord = htons(ctrl_ord); 909 } 910 911 /** 912 * irdma_cm_build_mpa_frame - build mpa frame for mpa version 1 or version 2 913 * @cm_node: connection's node 914 * @mpa: mpa: data buffer 915 * @mpa_key: to do read0 or write0 916 */ 917 static int 918 irdma_cm_build_mpa_frame(struct irdma_cm_node *cm_node, 919 struct irdma_kmem_info *mpa, u8 mpa_key) 920 { 921 int hdr_len = 0; 922 923 switch (cm_node->mpa_frame_rev) { 924 case IETF_MPA_V1: 925 hdr_len = sizeof(struct ietf_mpa_v1); 926 irdma_build_mpa_v1(cm_node, mpa->addr, mpa_key); 927 break; 928 case IETF_MPA_V2: 929 hdr_len = sizeof(struct ietf_mpa_v2); 930 irdma_build_mpa_v2(cm_node, mpa->addr, mpa_key); 931 break; 932 default: 933 break; 934 } 935 936 return hdr_len; 937 } 938 939 /** 940 * irdma_send_mpa_request - active node send mpa request to passive node 941 * @cm_node: connection's node 942 */ 943 static int 944 irdma_send_mpa_request(struct irdma_cm_node *cm_node) 945 { 946 struct irdma_puda_buf *sqbuf; 947 948 cm_node->mpa_hdr.addr = &cm_node->mpa_v2_frame; 949 cm_node->mpa_hdr.size = irdma_cm_build_mpa_frame(cm_node, 950 &cm_node->mpa_hdr, 951 MPA_KEY_REQUEST); 952 if (!cm_node->mpa_hdr.size) { 953 irdma_debug(iwdev_to_idev(cm_node->iwdev), IRDMA_DEBUG_CM, 954 "mpa size = %d\n", cm_node->mpa_hdr.size); 955 return -EINVAL; 956 } 957 958 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, 959 &cm_node->mpa_hdr, 960 &cm_node->pdata, SET_ACK); 961 if (!sqbuf) 962 return -ENOMEM; 963 964 return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 1, 965 0); 966 } 967 968 /** 969 * irdma_send_mpa_reject - 970 * @cm_node: connection's node 971 * @pdata: reject data for connection 972 * @plen: length of reject data 973 */ 974 static int 975 irdma_send_mpa_reject(struct irdma_cm_node *cm_node, 976 const void *pdata, u8 plen) 977 { 978 struct irdma_puda_buf *sqbuf; 979 struct irdma_mpa_priv_info priv_info; 980 981 cm_node->mpa_hdr.addr = &cm_node->mpa_v2_frame; 982 cm_node->mpa_hdr.size = irdma_cm_build_mpa_frame(cm_node, 983 &cm_node->mpa_hdr, 984 MPA_KEY_REPLY); 985 986 cm_node->mpa_v2_frame.flags |= IETF_MPA_FLAGS_REJECT; 987 priv_info.addr = pdata; 988 priv_info.size = plen; 989 990 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, 991 &cm_node->mpa_hdr, &priv_info, 992 SET_ACK | SET_FIN); 993 if (!sqbuf) 994 return -ENOMEM; 995 996 cm_node->state = IRDMA_CM_STATE_FIN_WAIT1; 997 998 return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 1, 999 0); 1000 } 1001 1002 /** 1003 * irdma_negotiate_mpa_v2_ird_ord - negotiate MPAv2 IRD/ORD 1004 * @cm_node: connection's node 1005 * @buf: Data pointer 1006 */ 1007 static int 1008 irdma_negotiate_mpa_v2_ird_ord(struct irdma_cm_node *cm_node, 1009 u8 *buf) 1010 { 1011 struct ietf_mpa_v2 *mpa_v2_frame; 1012 struct ietf_rtr_msg *rtr_msg; 1013 u16 ird_size; 1014 u16 ord_size; 1015 u16 ctrl_ord; 1016 u16 ctrl_ird; 1017 1018 mpa_v2_frame = (struct ietf_mpa_v2 *)buf; 1019 rtr_msg = &mpa_v2_frame->rtr_msg; 1020 1021 /* parse rtr message */ 1022 ctrl_ord = ntohs(rtr_msg->ctrl_ord); 1023 ctrl_ird = ntohs(rtr_msg->ctrl_ird); 1024 ird_size = ctrl_ird & IETF_NO_IRD_ORD; 1025 ord_size = ctrl_ord & IETF_NO_IRD_ORD; 1026 1027 if (!(ctrl_ird & IETF_PEER_TO_PEER)) 1028 return -EOPNOTSUPP; 1029 1030 if (ird_size == IETF_NO_IRD_ORD || ord_size == IETF_NO_IRD_ORD) { 1031 cm_node->mpav2_ird_ord = IETF_NO_IRD_ORD; 1032 goto negotiate_done; 1033 } 1034 1035 if (cm_node->state != IRDMA_CM_STATE_MPAREQ_SENT) { 1036 /* responder */ 1037 if (!ord_size && (ctrl_ord & IETF_RDMA0_READ)) 1038 cm_node->ird_size = 1; 1039 if (cm_node->ord_size > ird_size) 1040 cm_node->ord_size = ird_size; 1041 } else { 1042 /* initiator */ 1043 if (!ird_size && (ctrl_ord & IETF_RDMA0_READ)) 1044 /* Remote peer doesn't support RDMA0_READ */ 1045 return -EOPNOTSUPP; 1046 1047 if (cm_node->ord_size > ird_size) 1048 cm_node->ord_size = ird_size; 1049 1050 if (cm_node->ird_size < ord_size) 1051 /* no resources available */ 1052 return -EINVAL; 1053 } 1054 1055 negotiate_done: 1056 if (ctrl_ord & IETF_RDMA0_READ) 1057 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO; 1058 else if (ctrl_ord & IETF_RDMA0_WRITE) 1059 cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO; 1060 else 1061 /* Not supported RDMA0 operation */ 1062 return -EOPNOTSUPP; 1063 1064 irdma_debug(iwdev_to_idev(cm_node->iwdev), IRDMA_DEBUG_CM, 1065 "MPAV2 Negotiated ORD: %d, IRD: %d\n", cm_node->ord_size, 1066 cm_node->ird_size); 1067 return 0; 1068 } 1069 1070 /** 1071 * irdma_parse_mpa - process an IETF MPA frame 1072 * @cm_node: connection's node 1073 * @buf: Data pointer 1074 * @type: to return accept or reject 1075 * @len: Len of mpa buffer 1076 */ 1077 static int 1078 irdma_parse_mpa(struct irdma_cm_node *cm_node, u8 *buf, u32 *type, 1079 u32 len) 1080 { 1081 struct ietf_mpa_v1 *mpa_frame; 1082 int mpa_hdr_len, priv_data_len, ret; 1083 1084 *type = IRDMA_MPA_REQUEST_ACCEPT; 1085 1086 if (len < sizeof(struct ietf_mpa_v1)) { 1087 irdma_debug(iwdev_to_idev(cm_node->iwdev), IRDMA_DEBUG_CM, 1088 "ietf buffer small (%x)\n", len); 1089 return -EINVAL; 1090 } 1091 1092 mpa_frame = (struct ietf_mpa_v1 *)buf; 1093 mpa_hdr_len = sizeof(struct ietf_mpa_v1); 1094 priv_data_len = ntohs(mpa_frame->priv_data_len); 1095 1096 if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) { 1097 irdma_debug(iwdev_to_idev(cm_node->iwdev), IRDMA_DEBUG_CM, 1098 "private_data too big %d\n", priv_data_len); 1099 return -EOVERFLOW; 1100 } 1101 1102 if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) { 1103 irdma_debug(iwdev_to_idev(cm_node->iwdev), IRDMA_DEBUG_CM, 1104 "unsupported mpa rev = %d\n", mpa_frame->rev); 1105 return -EINVAL; 1106 } 1107 1108 if (mpa_frame->rev > cm_node->mpa_frame_rev) { 1109 irdma_debug(iwdev_to_idev(cm_node->iwdev), IRDMA_DEBUG_CM, 1110 "rev %d\n", mpa_frame->rev); 1111 return -EINVAL; 1112 } 1113 1114 cm_node->mpa_frame_rev = mpa_frame->rev; 1115 if (cm_node->state != IRDMA_CM_STATE_MPAREQ_SENT) { 1116 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, 1117 IETF_MPA_KEY_SIZE)) { 1118 irdma_debug(iwdev_to_idev(cm_node->iwdev), 1119 IRDMA_DEBUG_CM, 1120 "Unexpected MPA Key received\n"); 1121 return -EINVAL; 1122 } 1123 } else { 1124 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, 1125 IETF_MPA_KEY_SIZE)) { 1126 irdma_debug(iwdev_to_idev(cm_node->iwdev), 1127 IRDMA_DEBUG_CM, 1128 "Unexpected MPA Key received\n"); 1129 return -EINVAL; 1130 } 1131 } 1132 1133 if (priv_data_len + mpa_hdr_len > len) { 1134 irdma_debug(iwdev_to_idev(cm_node->iwdev), IRDMA_DEBUG_CM, 1135 "ietf buffer len(%x + %x != %x)\n", priv_data_len, 1136 mpa_hdr_len, len); 1137 return -EOVERFLOW; 1138 } 1139 1140 if (len > IRDMA_MAX_CM_BUF) { 1141 irdma_debug(iwdev_to_idev(cm_node->iwdev), IRDMA_DEBUG_CM, 1142 "ietf buffer large len = %d\n", len); 1143 return -EOVERFLOW; 1144 } 1145 1146 switch (mpa_frame->rev) { 1147 case IETF_MPA_V2: 1148 mpa_hdr_len += IETF_RTR_MSG_SIZE; 1149 ret = irdma_negotiate_mpa_v2_ird_ord(cm_node, buf); 1150 if (ret) 1151 return ret; 1152 break; 1153 case IETF_MPA_V1: 1154 default: 1155 break; 1156 } 1157 1158 memcpy(cm_node->pdata_buf, buf + mpa_hdr_len, priv_data_len); 1159 cm_node->pdata.size = priv_data_len; 1160 1161 if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT) 1162 *type = IRDMA_MPA_REQUEST_REJECT; 1163 1164 if (mpa_frame->flags & IETF_MPA_FLAGS_MARKERS) 1165 cm_node->snd_mark_en = true; 1166 1167 return 0; 1168 } 1169 1170 /** 1171 * irdma_schedule_cm_timer 1172 * @cm_node: connection's node 1173 * @sqbuf: buffer to send 1174 * @type: if it is send or close 1175 * @send_retrans: if rexmits to be done 1176 * @close_when_complete: is cm_node to be removed 1177 * 1178 * note - cm_node needs to be protected before calling this. Encase in: 1179 * irdma_rem_ref_cm_node(cm_core, cm_node); 1180 * irdma_schedule_cm_timer(...) 1181 * atomic_inc(&cm_node->refcnt); 1182 */ 1183 int 1184 irdma_schedule_cm_timer(struct irdma_cm_node *cm_node, 1185 struct irdma_puda_buf *sqbuf, 1186 enum irdma_timer_type type, int send_retrans, 1187 int close_when_complete) 1188 { 1189 struct irdma_sc_vsi *vsi = &cm_node->iwdev->vsi; 1190 struct irdma_cm_core *cm_core = cm_node->cm_core; 1191 struct irdma_timer_entry *new_send; 1192 u32 was_timer_set; 1193 unsigned long flags; 1194 1195 new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC); 1196 if (!new_send) { 1197 if (type != IRDMA_TIMER_TYPE_CLOSE) 1198 irdma_free_sqbuf(vsi, sqbuf); 1199 return -ENOMEM; 1200 } 1201 1202 new_send->retrycount = IRDMA_DEFAULT_RETRYS; 1203 new_send->retranscount = IRDMA_DEFAULT_RETRANS; 1204 new_send->sqbuf = sqbuf; 1205 new_send->timetosend = jiffies; 1206 new_send->type = type; 1207 new_send->send_retrans = send_retrans; 1208 new_send->close_when_complete = close_when_complete; 1209 1210 if (type == IRDMA_TIMER_TYPE_CLOSE) { 1211 new_send->timetosend += (HZ / 10); 1212 if (cm_node->close_entry) { 1213 kfree(new_send); 1214 irdma_debug(iwdev_to_idev(cm_node->iwdev), 1215 IRDMA_DEBUG_CM, "already close entry\n"); 1216 return -EINVAL; 1217 } 1218 1219 cm_node->close_entry = new_send; 1220 } else { /* type == IRDMA_TIMER_TYPE_SEND */ 1221 spin_lock_irqsave(&cm_node->retrans_list_lock, flags); 1222 cm_node->send_entry = new_send; 1223 atomic_inc(&cm_node->refcnt); 1224 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); 1225 new_send->timetosend = jiffies + IRDMA_RETRY_TIMEOUT; 1226 1227 atomic_inc(&sqbuf->refcount); 1228 irdma_puda_send_buf(vsi->ilq, sqbuf); 1229 if (!send_retrans) { 1230 irdma_cleanup_retrans_entry(cm_node); 1231 if (close_when_complete) 1232 irdma_rem_ref_cm_node(cm_node); 1233 return 0; 1234 } 1235 } 1236 1237 spin_lock_irqsave(&cm_core->ht_lock, flags); 1238 was_timer_set = timer_pending(&cm_core->tcp_timer); 1239 1240 if (!was_timer_set) { 1241 cm_core->tcp_timer.expires = new_send->timetosend; 1242 add_timer(&cm_core->tcp_timer); 1243 } 1244 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 1245 1246 return 0; 1247 } 1248 1249 /** 1250 * irdma_retrans_expired - Could not rexmit the packet 1251 * @cm_node: connection's node 1252 */ 1253 static void 1254 irdma_retrans_expired(struct irdma_cm_node *cm_node) 1255 { 1256 enum irdma_cm_node_state state = cm_node->state; 1257 1258 cm_node->state = IRDMA_CM_STATE_CLOSED; 1259 switch (state) { 1260 case IRDMA_CM_STATE_SYN_RCVD: 1261 case IRDMA_CM_STATE_CLOSING: 1262 irdma_rem_ref_cm_node(cm_node); 1263 break; 1264 case IRDMA_CM_STATE_FIN_WAIT1: 1265 case IRDMA_CM_STATE_LAST_ACK: 1266 irdma_send_reset(cm_node); 1267 break; 1268 default: 1269 atomic_inc(&cm_node->refcnt); 1270 irdma_send_reset(cm_node); 1271 irdma_create_event(cm_node, IRDMA_CM_EVENT_ABORTED); 1272 break; 1273 } 1274 } 1275 1276 /** 1277 * irdma_handle_close_entry - for handling retry/timeouts 1278 * @cm_node: connection's node 1279 * @rem_node: flag for remove cm_node 1280 */ 1281 static void 1282 irdma_handle_close_entry(struct irdma_cm_node *cm_node, 1283 u32 rem_node) 1284 { 1285 struct irdma_timer_entry *close_entry = cm_node->close_entry; 1286 struct irdma_qp *iwqp; 1287 unsigned long flags; 1288 1289 if (!close_entry) 1290 return; 1291 iwqp = (struct irdma_qp *)close_entry->sqbuf; 1292 if (iwqp) { 1293 spin_lock_irqsave(&iwqp->lock, flags); 1294 if (iwqp->cm_id) { 1295 iwqp->hw_tcp_state = IRDMA_TCP_STATE_CLOSED; 1296 iwqp->hw_iwarp_state = IRDMA_QP_STATE_ERROR; 1297 iwqp->last_aeq = IRDMA_AE_RESET_SENT; 1298 iwqp->ibqp_state = IB_QPS_ERR; 1299 spin_unlock_irqrestore(&iwqp->lock, flags); 1300 irdma_cm_disconn(iwqp); 1301 } else { 1302 spin_unlock_irqrestore(&iwqp->lock, flags); 1303 } 1304 } else if (rem_node) { 1305 /* TIME_WAIT state */ 1306 irdma_rem_ref_cm_node(cm_node); 1307 } 1308 1309 kfree(close_entry); 1310 cm_node->close_entry = NULL; 1311 } 1312 1313 /** 1314 * irdma_cm_timer_tick - system's timer expired callback 1315 * @t: Pointer to timer_list 1316 */ 1317 static void 1318 irdma_cm_timer_tick(struct timer_list *t) 1319 { 1320 unsigned long nexttimeout = jiffies + IRDMA_LONG_TIME; 1321 struct irdma_cm_node *cm_node; 1322 struct irdma_timer_entry *send_entry, *close_entry; 1323 struct list_head *list_core_temp; 1324 struct list_head *list_node; 1325 struct irdma_cm_core *cm_core = from_timer(cm_core, t, tcp_timer); 1326 struct irdma_sc_vsi *vsi; 1327 u32 settimer = 0; 1328 unsigned long timetosend; 1329 unsigned long flags; 1330 struct list_head timer_list; 1331 1332 INIT_LIST_HEAD(&timer_list); 1333 1334 rcu_read_lock(); 1335 irdma_timer_list_prep(cm_core, &timer_list); 1336 rcu_read_unlock(); 1337 1338 list_for_each_safe(list_node, list_core_temp, &timer_list) { 1339 cm_node = container_of(list_node, struct irdma_cm_node, 1340 timer_entry); 1341 close_entry = cm_node->close_entry; 1342 1343 if (close_entry) { 1344 if (time_after(close_entry->timetosend, jiffies)) { 1345 if (nexttimeout > close_entry->timetosend || 1346 !settimer) { 1347 nexttimeout = close_entry->timetosend; 1348 settimer = 1; 1349 } 1350 } else { 1351 irdma_handle_close_entry(cm_node, 1); 1352 } 1353 } 1354 1355 spin_lock_irqsave(&cm_node->retrans_list_lock, flags); 1356 1357 send_entry = cm_node->send_entry; 1358 if (!send_entry) 1359 goto done; 1360 if (time_after(send_entry->timetosend, jiffies)) { 1361 if (cm_node->state != IRDMA_CM_STATE_OFFLOADED) { 1362 if (nexttimeout > send_entry->timetosend || 1363 !settimer) { 1364 nexttimeout = send_entry->timetosend; 1365 settimer = 1; 1366 } 1367 } else { 1368 irdma_free_retrans_entry(cm_node); 1369 } 1370 goto done; 1371 } 1372 1373 if (cm_node->state == IRDMA_CM_STATE_OFFLOADED || 1374 cm_node->state == IRDMA_CM_STATE_CLOSED) { 1375 irdma_free_retrans_entry(cm_node); 1376 goto done; 1377 } 1378 1379 if (!send_entry->retranscount || !send_entry->retrycount) { 1380 irdma_free_retrans_entry(cm_node); 1381 1382 spin_unlock_irqrestore(&cm_node->retrans_list_lock, 1383 flags); 1384 irdma_retrans_expired(cm_node); 1385 cm_node->state = IRDMA_CM_STATE_CLOSED; 1386 spin_lock_irqsave(&cm_node->retrans_list_lock, flags); 1387 goto done; 1388 } 1389 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); 1390 1391 vsi = &cm_node->iwdev->vsi; 1392 if (!cm_node->ack_rcvd) { 1393 atomic_inc(&send_entry->sqbuf->refcount); 1394 irdma_puda_send_buf(vsi->ilq, send_entry->sqbuf); 1395 cm_node->cm_core->stats_pkt_retrans++; 1396 } 1397 1398 spin_lock_irqsave(&cm_node->retrans_list_lock, flags); 1399 if (send_entry->send_retrans) { 1400 send_entry->retranscount--; 1401 timetosend = (IRDMA_RETRY_TIMEOUT << 1402 (IRDMA_DEFAULT_RETRANS - 1403 send_entry->retranscount)); 1404 1405 send_entry->timetosend = jiffies + 1406 min(timetosend, IRDMA_MAX_TIMEOUT); 1407 if (nexttimeout > send_entry->timetosend || !settimer) { 1408 nexttimeout = send_entry->timetosend; 1409 settimer = 1; 1410 } 1411 } else { 1412 int close_when_complete; 1413 1414 close_when_complete = send_entry->close_when_complete; 1415 irdma_free_retrans_entry(cm_node); 1416 if (close_when_complete) 1417 irdma_rem_ref_cm_node(cm_node); 1418 } 1419 done: 1420 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); 1421 irdma_rem_ref_cm_node(cm_node); 1422 } 1423 1424 if (settimer) { 1425 spin_lock_irqsave(&cm_core->ht_lock, flags); 1426 if (!timer_pending(&cm_core->tcp_timer)) { 1427 cm_core->tcp_timer.expires = nexttimeout; 1428 add_timer(&cm_core->tcp_timer); 1429 } 1430 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 1431 } 1432 } 1433 1434 /** 1435 * irdma_send_syn - send SYN packet 1436 * @cm_node: connection's node 1437 * @sendack: flag to set ACK bit or not 1438 */ 1439 int 1440 irdma_send_syn(struct irdma_cm_node *cm_node, u32 sendack) 1441 { 1442 struct irdma_puda_buf *sqbuf; 1443 int flags = SET_SYN; 1444 char optionsbuf[sizeof(struct option_mss) + 1445 sizeof(struct option_windowscale) + 1446 sizeof(struct option_base) + TCP_OPTIONS_PADDING]; 1447 struct irdma_kmem_info opts; 1448 int optionssize = 0; 1449 /* Sending MSS option */ 1450 union all_known_options *options; 1451 1452 opts.addr = optionsbuf; 1453 if (!cm_node) 1454 return -EINVAL; 1455 1456 options = (union all_known_options *)&optionsbuf[optionssize]; 1457 options->mss.optionnum = OPTION_NUM_MSS; 1458 options->mss.len = sizeof(struct option_mss); 1459 options->mss.mss = htons(cm_node->tcp_cntxt.mss); 1460 optionssize += sizeof(struct option_mss); 1461 1462 options = (union all_known_options *)&optionsbuf[optionssize]; 1463 options->windowscale.optionnum = OPTION_NUM_WINDOW_SCALE; 1464 options->windowscale.len = sizeof(struct option_windowscale); 1465 options->windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale; 1466 optionssize += sizeof(struct option_windowscale); 1467 options = (union all_known_options *)&optionsbuf[optionssize]; 1468 options->eol = OPTION_NUM_EOL; 1469 optionssize += 1; 1470 1471 if (sendack) 1472 flags |= SET_ACK; 1473 1474 opts.size = optionssize; 1475 1476 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, &opts, NULL, NULL, 1477 flags); 1478 if (!sqbuf) 1479 return -ENOMEM; 1480 1481 return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 1, 1482 0); 1483 } 1484 1485 /** 1486 * irdma_send_ack - Send ACK packet 1487 * @cm_node: connection's node 1488 */ 1489 void 1490 irdma_send_ack(struct irdma_cm_node *cm_node) 1491 { 1492 struct irdma_puda_buf *sqbuf; 1493 struct irdma_sc_vsi *vsi = &cm_node->iwdev->vsi; 1494 1495 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, NULL, NULL, 1496 SET_ACK); 1497 if (sqbuf) 1498 irdma_puda_send_buf(vsi->ilq, sqbuf); 1499 } 1500 1501 /** 1502 * irdma_send_fin - Send FIN pkt 1503 * @cm_node: connection's node 1504 */ 1505 static int 1506 irdma_send_fin(struct irdma_cm_node *cm_node) 1507 { 1508 struct irdma_puda_buf *sqbuf; 1509 1510 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, NULL, NULL, 1511 SET_ACK | SET_FIN); 1512 if (!sqbuf) 1513 return -ENOMEM; 1514 1515 return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 1, 1516 0); 1517 } 1518 1519 /** 1520 * irdma_find_listener - find a cm node listening on this addr-port pair 1521 * @cm_core: cm's core 1522 * @dst_addr: listener ip addr 1523 * @dst_port: listener tcp port num 1524 * @vlan_id: virtual LAN ID 1525 * @listener_state: state to match with listen node's 1526 */ 1527 static struct irdma_cm_listener * 1528 irdma_find_listener(struct irdma_cm_core *cm_core, u32 *dst_addr, u16 dst_port, 1529 u16 vlan_id, enum irdma_cm_listener_state listener_state) 1530 { 1531 struct irdma_cm_listener *listen_node; 1532 static const u32 ip_zero[4] = {0, 0, 0, 0}; 1533 u32 listen_addr[4]; 1534 u16 listen_port; 1535 unsigned long flags; 1536 1537 /* walk list and find cm_node associated with this session ID */ 1538 spin_lock_irqsave(&cm_core->listen_list_lock, flags); 1539 list_for_each_entry(listen_node, &cm_core->listen_list, list) { 1540 memcpy(listen_addr, listen_node->loc_addr, sizeof(listen_addr)); 1541 listen_port = listen_node->loc_port; 1542 if (listen_port != dst_port || 1543 !(listener_state & listen_node->listener_state)) 1544 continue; 1545 /* compare node pair, return node handle if a match */ 1546 if (!memcmp(listen_addr, ip_zero, sizeof(listen_addr)) || 1547 (!memcmp(listen_addr, dst_addr, sizeof(listen_addr)) && 1548 vlan_id == listen_node->vlan_id)) { 1549 atomic_inc(&listen_node->refcnt); 1550 spin_unlock_irqrestore(&cm_core->listen_list_lock, 1551 flags); 1552 return listen_node; 1553 } 1554 } 1555 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); 1556 1557 return NULL; 1558 } 1559 1560 /** 1561 * irdma_del_multiple_qhash - Remove qhash and child listens 1562 * @iwdev: iWarp device 1563 * @cm_info: CM info for parent listen node 1564 * @cm_parent_listen_node: The parent listen node 1565 */ 1566 static int 1567 irdma_del_multiple_qhash(struct irdma_device *iwdev, 1568 struct irdma_cm_info *cm_info, 1569 struct irdma_cm_listener *cm_parent_listen_node) 1570 { 1571 struct irdma_cm_listener *child_listen_node; 1572 struct list_head *pos, *tpos; 1573 unsigned long flags; 1574 int ret = -EINVAL; 1575 1576 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags); 1577 list_for_each_safe(pos, tpos, 1578 &cm_parent_listen_node->child_listen_list) { 1579 child_listen_node = list_entry(pos, struct irdma_cm_listener, 1580 child_listen_list); 1581 if (child_listen_node->ipv4) 1582 irdma_debug(iwdev_to_idev(iwdev), IRDMA_DEBUG_CM, 1583 "removing child listen for IP=%pI4, port=%d, vlan=%d\n", 1584 child_listen_node->loc_addr, 1585 child_listen_node->loc_port, 1586 child_listen_node->vlan_id); 1587 else 1588 irdma_debug(iwdev_to_idev(iwdev), IRDMA_DEBUG_CM, 1589 "removing child listen for IP=%pI6, port=%d, vlan=%d\n", 1590 child_listen_node->loc_addr, 1591 child_listen_node->loc_port, 1592 child_listen_node->vlan_id); 1593 list_del(pos); 1594 memcpy(cm_info->loc_addr, child_listen_node->loc_addr, 1595 sizeof(cm_info->loc_addr)); 1596 cm_info->vlan_id = child_listen_node->vlan_id; 1597 if (child_listen_node->qhash_set) { 1598 ret = irdma_manage_qhash(iwdev, cm_info, 1599 IRDMA_QHASH_TYPE_TCP_SYN, 1600 IRDMA_QHASH_MANAGE_TYPE_DELETE, 1601 NULL, false); 1602 child_listen_node->qhash_set = false; 1603 } else { 1604 ret = 0; 1605 } 1606 irdma_debug(iwdev_to_idev(iwdev), IRDMA_DEBUG_CM, 1607 "Child listen node freed = %p\n", 1608 child_listen_node); 1609 kfree(child_listen_node); 1610 cm_parent_listen_node->cm_core->stats_listen_nodes_destroyed++; 1611 } 1612 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); 1613 1614 return ret; 1615 } 1616 1617 /** 1618 * irdma_netdev_vlan_ipv6 - Gets the netdev and mac 1619 * @addr: local IPv6 address 1620 * @vlan_id: vlan id for the given IPv6 address 1621 * @mac: mac address for the given IPv6 address 1622 * 1623 * Returns the net_device of the IPv6 address and also sets the 1624 * vlan id and mac for that address. 1625 */ 1626 struct ifnet * 1627 irdma_netdev_vlan_ipv6(u32 *addr, u16 *vlan_id, u8 *mac) 1628 { 1629 struct ifnet *ip_dev = NULL; 1630 struct in6_addr laddr6; 1631 1632 irdma_copy_ip_htonl(laddr6.__u6_addr.__u6_addr32, addr); 1633 if (vlan_id) 1634 *vlan_id = 0xFFFF; /* Match rdma_vlan_dev_vlan_id() */ 1635 if (mac) 1636 eth_zero_addr(mac); 1637 1638 ip_dev = ip6_ifp_find(&init_net, laddr6, 0); 1639 if (ip_dev) { 1640 if (vlan_id) 1641 *vlan_id = rdma_vlan_dev_vlan_id(ip_dev); 1642 if (ip_dev->if_addr && ip_dev->if_addr->ifa_addr && mac) 1643 ether_addr_copy(mac, IF_LLADDR(ip_dev)); 1644 } 1645 1646 return ip_dev; 1647 } 1648 1649 /** 1650 * irdma_get_vlan_ipv4 - Returns the vlan_id for IPv4 address 1651 * @addr: local IPv4 address 1652 */ 1653 u16 1654 irdma_get_vlan_ipv4(u32 *addr) 1655 { 1656 struct ifnet *netdev; 1657 u16 vlan_id = 0xFFFF; 1658 1659 netdev = ip_ifp_find(&init_net, htonl(addr[0])); 1660 if (netdev) { 1661 vlan_id = rdma_vlan_dev_vlan_id(netdev); 1662 dev_put(netdev); 1663 } 1664 1665 return vlan_id; 1666 } 1667 1668 /** 1669 * irdma_add_mqh_6 - Adds multiple qhashes for IPv6 1670 * @iwdev: iWarp device 1671 * @cm_info: CM info for parent listen node 1672 * @cm_parent_listen_node: The parent listen node 1673 * 1674 * Adds a qhash and a child listen node for every IPv6 address 1675 * on the adapter and adds the associated qhash filter 1676 */ 1677 static int 1678 irdma_add_mqh_6(struct irdma_device *iwdev, 1679 struct irdma_cm_info *cm_info, 1680 struct irdma_cm_listener *cm_parent_listen_node) 1681 { 1682 struct ifnet *ip_dev; 1683 struct ifaddr *ifp; 1684 struct irdma_cm_listener *child_listen_node; 1685 unsigned long flags; 1686 int ret = 0; 1687 1688 IFNET_RLOCK(); 1689 IRDMA_TAILQ_FOREACH((ip_dev), &V_ifnet, if_link) { 1690 if (!(ip_dev->if_flags & IFF_UP)) 1691 continue; 1692 1693 if (((rdma_vlan_dev_vlan_id(ip_dev) >= VLAN_N_VID) || 1694 (rdma_vlan_dev_real_dev(ip_dev) != iwdev->netdev)) && 1695 ip_dev != iwdev->netdev) 1696 continue; 1697 1698 if_addr_rlock(ip_dev); 1699 IRDMA_TAILQ_FOREACH(ifp, &ip_dev->if_addrhead, ifa_link) { 1700 irdma_debug(iwdev_to_idev(iwdev), IRDMA_DEBUG_CM, 1701 "IP=%pI6, vlan_id=%d, MAC=%pM\n", 1702 &((struct sockaddr_in6 *)ifp->ifa_addr)->sin6_addr, rdma_vlan_dev_vlan_id(ip_dev), 1703 IF_LLADDR(ip_dev)); 1704 if (((struct sockaddr_in6 *)ifp->ifa_addr)->sin6_family != AF_INET6) 1705 continue; 1706 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_KERNEL); 1707 irdma_debug(iwdev_to_idev(iwdev), IRDMA_DEBUG_CM, 1708 "Allocating child listener %p\n", 1709 child_listen_node); 1710 if (!child_listen_node) { 1711 irdma_debug(iwdev_to_idev(iwdev), 1712 IRDMA_DEBUG_CM, 1713 "listener memory allocation\n"); 1714 ret = -ENOMEM; 1715 if_addr_runlock(ip_dev); 1716 goto exit; 1717 } 1718 1719 memcpy(child_listen_node, cm_parent_listen_node, 1720 sizeof(*child_listen_node)); 1721 cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev); 1722 child_listen_node->vlan_id = cm_info->vlan_id; 1723 irdma_copy_ip_ntohl(child_listen_node->loc_addr, 1724 ((struct sockaddr_in6 *)ifp->ifa_addr)->sin6_addr.__u6_addr.__u6_addr32); 1725 memcpy(cm_info->loc_addr, child_listen_node->loc_addr, 1726 sizeof(cm_info->loc_addr)); 1727 ret = irdma_manage_qhash(iwdev, cm_info, 1728 IRDMA_QHASH_TYPE_TCP_SYN, 1729 IRDMA_QHASH_MANAGE_TYPE_ADD, 1730 NULL, true); 1731 if (ret) { 1732 kfree(child_listen_node); 1733 continue; 1734 } 1735 1736 child_listen_node->qhash_set = true; 1737 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags); 1738 list_add(&child_listen_node->child_listen_list, 1739 &cm_parent_listen_node->child_listen_list); 1740 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); 1741 cm_parent_listen_node->cm_core->stats_listen_nodes_created++; 1742 } 1743 if_addr_runlock(ip_dev); 1744 } 1745 exit: 1746 IFNET_RUNLOCK(); 1747 1748 return ret; 1749 } 1750 1751 /** 1752 * irdma_add_mqh_4 - Adds multiple qhashes for IPv4 1753 * @iwdev: iWarp device 1754 * @cm_info: CM info for parent listen node 1755 * @cm_parent_listen_node: The parent listen node 1756 * 1757 * Adds a qhash and a child listen node for every IPv4 address 1758 * on the adapter and adds the associated qhash filter 1759 */ 1760 static int 1761 irdma_add_mqh_4(struct irdma_device *iwdev, 1762 struct irdma_cm_info *cm_info, 1763 struct irdma_cm_listener *cm_parent_listen_node) 1764 { 1765 struct ifnet *ip_dev; 1766 struct irdma_cm_listener *child_listen_node; 1767 unsigned long flags; 1768 struct ifaddr *ifa; 1769 int ret = 0; 1770 1771 IFNET_RLOCK(); 1772 IRDMA_TAILQ_FOREACH((ip_dev), &V_ifnet, if_link) { 1773 if (!(ip_dev->if_flags & IFF_UP)) 1774 continue; 1775 1776 if (((rdma_vlan_dev_vlan_id(ip_dev) >= VLAN_N_VID) || 1777 (rdma_vlan_dev_real_dev(ip_dev) != iwdev->netdev)) && 1778 ip_dev != iwdev->netdev) 1779 continue; 1780 1781 if_addr_rlock(ip_dev); 1782 IRDMA_TAILQ_FOREACH(ifa, &ip_dev->if_addrhead, ifa_link) { 1783 irdma_debug(iwdev_to_idev(iwdev), IRDMA_DEBUG_CM, 1784 "Allocating child CM Listener forIP=%pI4, vlan_id=%d, MAC=%pM\n", 1785 &ifa->ifa_addr, 1786 rdma_vlan_dev_vlan_id(ip_dev), IF_LLADDR(ip_dev)); 1787 if (((struct sockaddr_in *)ifa->ifa_addr)->sin_family != AF_INET) 1788 continue; 1789 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_KERNEL); 1790 cm_parent_listen_node->cm_core->stats_listen_nodes_created++; 1791 irdma_debug(iwdev_to_idev(iwdev), IRDMA_DEBUG_CM, 1792 "Allocating child listener %p\n", 1793 child_listen_node); 1794 if (!child_listen_node) { 1795 irdma_debug(iwdev_to_idev(iwdev), IRDMA_DEBUG_CM, 1796 "listener memory allocation\n"); 1797 if_addr_runlock(ip_dev); 1798 ret = -ENOMEM; 1799 goto exit; 1800 } 1801 1802 memcpy(child_listen_node, cm_parent_listen_node, 1803 sizeof(*child_listen_node)); 1804 child_listen_node->vlan_id = rdma_vlan_dev_vlan_id(ip_dev); 1805 cm_info->vlan_id = child_listen_node->vlan_id; 1806 child_listen_node->loc_addr[0] = 1807 ntohl(((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr); 1808 memcpy(cm_info->loc_addr, child_listen_node->loc_addr, 1809 sizeof(cm_info->loc_addr)); 1810 ret = irdma_manage_qhash(iwdev, cm_info, 1811 IRDMA_QHASH_TYPE_TCP_SYN, 1812 IRDMA_QHASH_MANAGE_TYPE_ADD, 1813 NULL, true); 1814 if (ret) { 1815 kfree(child_listen_node); 1816 cm_parent_listen_node->cm_core 1817 ->stats_listen_nodes_created--; 1818 continue; 1819 } 1820 1821 child_listen_node->qhash_set = true; 1822 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, 1823 flags); 1824 list_add(&child_listen_node->child_listen_list, 1825 &cm_parent_listen_node->child_listen_list); 1826 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); 1827 } 1828 if_addr_runlock(ip_dev); 1829 } 1830 exit: 1831 IFNET_RUNLOCK(); 1832 1833 return ret; 1834 } 1835 1836 /** 1837 * irdma_add_mqh - Adds multiple qhashes 1838 * @iwdev: iWarp device 1839 * @cm_info: CM info for parent listen node 1840 * @cm_listen_node: The parent listen node 1841 */ 1842 static int 1843 irdma_add_mqh(struct irdma_device *iwdev, 1844 struct irdma_cm_info *cm_info, 1845 struct irdma_cm_listener *cm_listen_node) 1846 { 1847 int err; 1848 VNET_ITERATOR_DECL(vnet_iter); 1849 1850 VNET_LIST_RLOCK(); 1851 VNET_FOREACH(vnet_iter) { 1852 IFNET_RLOCK(); 1853 CURVNET_SET_QUIET(vnet_iter); 1854 1855 if (cm_info->ipv4) 1856 err = irdma_add_mqh_4(iwdev, cm_info, cm_listen_node); 1857 else 1858 err = irdma_add_mqh_6(iwdev, cm_info, cm_listen_node); 1859 CURVNET_RESTORE(); 1860 IFNET_RUNLOCK(); 1861 } 1862 VNET_LIST_RUNLOCK(); 1863 1864 return err; 1865 } 1866 1867 /** 1868 * irdma_reset_list_prep - add connection nodes slated for reset to list 1869 * @cm_core: cm's core 1870 * @listener: pointer to listener node 1871 * @reset_list: a list to which cm_node will be selected 1872 */ 1873 static void 1874 irdma_reset_list_prep(struct irdma_cm_core *cm_core, 1875 struct irdma_cm_listener *listener, 1876 struct list_head *reset_list) 1877 { 1878 struct irdma_cm_node *cm_node; 1879 int bkt; 1880 1881 HASH_FOR_EACH_RCU(cm_core->cm_hash_tbl, bkt, cm_node, list) { 1882 if (cm_node->listener == listener && 1883 !cm_node->accelerated && 1884 atomic_inc_not_zero(&cm_node->refcnt)) 1885 list_add(&cm_node->reset_entry, reset_list); 1886 } 1887 } 1888 1889 /** 1890 * irdma_dec_refcnt_listen - delete listener and associated cm nodes 1891 * @cm_core: cm's core 1892 * @listener: pointer to listener node 1893 * @free_hanging_nodes: to free associated cm_nodes 1894 * @apbvt_del: flag to delete the apbvt 1895 */ 1896 static int 1897 irdma_dec_refcnt_listen(struct irdma_cm_core *cm_core, 1898 struct irdma_cm_listener *listener, 1899 int free_hanging_nodes, bool apbvt_del) 1900 { 1901 struct list_head *list_pos; 1902 struct list_head *list_temp; 1903 struct irdma_cm_node *cm_node; 1904 struct list_head reset_list; 1905 struct irdma_cm_info nfo; 1906 enum irdma_cm_node_state old_state; 1907 unsigned long flags; 1908 int err; 1909 1910 /* free non-accelerated child nodes for this listener */ 1911 INIT_LIST_HEAD(&reset_list); 1912 if (free_hanging_nodes) { 1913 rcu_read_lock(); 1914 irdma_reset_list_prep(cm_core, listener, &reset_list); 1915 rcu_read_unlock(); 1916 } 1917 1918 list_for_each_safe(list_pos, list_temp, &reset_list) { 1919 cm_node = container_of(list_pos, struct irdma_cm_node, 1920 reset_entry); 1921 if (cm_node->state >= IRDMA_CM_STATE_FIN_WAIT1) { 1922 irdma_rem_ref_cm_node(cm_node); 1923 continue; 1924 } 1925 1926 irdma_cleanup_retrans_entry(cm_node); 1927 err = irdma_send_reset(cm_node); 1928 if (err) { 1929 cm_node->state = IRDMA_CM_STATE_CLOSED; 1930 irdma_debug(iwdev_to_idev(cm_node->iwdev), 1931 IRDMA_DEBUG_CM, "send reset failed\n"); 1932 } else { 1933 old_state = cm_node->state; 1934 cm_node->state = IRDMA_CM_STATE_LISTENER_DESTROYED; 1935 if (old_state != IRDMA_CM_STATE_MPAREQ_RCVD) 1936 irdma_rem_ref_cm_node(cm_node); 1937 } 1938 } 1939 1940 if (atomic_dec_and_test(&listener->refcnt)) { 1941 spin_lock_irqsave(&cm_core->listen_list_lock, flags); 1942 list_del(&listener->list); 1943 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); 1944 1945 if (apbvt_del) 1946 irdma_del_apbvt(listener->iwdev, 1947 listener->apbvt_entry); 1948 memcpy(nfo.loc_addr, listener->loc_addr, sizeof(nfo.loc_addr)); 1949 nfo.loc_port = listener->loc_port; 1950 nfo.ipv4 = listener->ipv4; 1951 nfo.vlan_id = listener->vlan_id; 1952 nfo.user_pri = listener->user_pri; 1953 nfo.qh_qpid = listener->iwdev->vsi.ilq->qp_id; 1954 1955 if (!list_empty(&listener->child_listen_list)) { 1956 irdma_del_multiple_qhash(listener->iwdev, &nfo, 1957 listener); 1958 } else { 1959 if (listener->qhash_set) 1960 irdma_manage_qhash(listener->iwdev, 1961 &nfo, 1962 IRDMA_QHASH_TYPE_TCP_SYN, 1963 IRDMA_QHASH_MANAGE_TYPE_DELETE, 1964 NULL, false); 1965 } 1966 1967 cm_core->stats_listen_destroyed++; 1968 cm_core->stats_listen_nodes_destroyed++; 1969 irdma_debug(iwdev_to_idev(listener->iwdev), IRDMA_DEBUG_CM, 1970 "loc_port=0x%04x loc_addr=%pI4 cm_listen_node=%p cm_id=%p qhash_set=%d vlan_id=%d apbvt_del=%d\n", 1971 listener->loc_port, listener->loc_addr, listener, listener->cm_id, listener->qhash_set, 1972 listener->vlan_id, apbvt_del); 1973 kfree(listener); 1974 listener = NULL; 1975 return 0; 1976 } 1977 1978 return -EINVAL; 1979 } 1980 1981 /** 1982 * irdma_cm_del_listen - delete a listener 1983 * @cm_core: cm's core 1984 * @listener: passive connection's listener 1985 * @apbvt_del: flag to delete apbvt 1986 */ 1987 static int 1988 irdma_cm_del_listen(struct irdma_cm_core *cm_core, 1989 struct irdma_cm_listener *listener, 1990 bool apbvt_del) 1991 { 1992 listener->listener_state = IRDMA_CM_LISTENER_PASSIVE_STATE; 1993 listener->cm_id = NULL; 1994 1995 return irdma_dec_refcnt_listen(cm_core, listener, 1, apbvt_del); 1996 } 1997 1998 /** 1999 * irdma_find_node - find a cm node that matches the reference cm node 2000 * @cm_core: cm's core 2001 * @rem_port: remote tcp port num 2002 * @rem_addr: remote ip addr 2003 * @loc_port: local tcp port num 2004 * @loc_addr: local ip addr 2005 * @vlan_id: local VLAN ID 2006 */ 2007 struct irdma_cm_node * 2008 irdma_find_node(struct irdma_cm_core *cm_core, 2009 u16 rem_port, u32 *rem_addr, u16 loc_port, 2010 u32 *loc_addr, u16 vlan_id) 2011 { 2012 struct irdma_cm_node *cm_node; 2013 u32 key = (rem_port << 16) | loc_port; 2014 2015 rcu_read_lock(); 2016 HASH_FOR_EACH_POSSIBLE_RCU(cm_core->cm_hash_tbl, cm_node, list, key) { 2017 if (cm_node->vlan_id == vlan_id && 2018 cm_node->loc_port == loc_port && cm_node->rem_port == rem_port && 2019 !memcmp(cm_node->loc_addr, loc_addr, sizeof(cm_node->loc_addr)) && 2020 !memcmp(cm_node->rem_addr, rem_addr, sizeof(cm_node->rem_addr))) { 2021 if (!atomic_inc_not_zero(&cm_node->refcnt)) 2022 goto exit; 2023 rcu_read_unlock(); 2024 return cm_node; 2025 } 2026 } 2027 2028 exit: 2029 rcu_read_unlock(); 2030 2031 /* no owner node */ 2032 return NULL; 2033 } 2034 2035 /** 2036 * irdma_add_hte_node - add a cm node to the hash table 2037 * @cm_core: cm's core 2038 * @cm_node: connection's node 2039 */ 2040 static void 2041 irdma_add_hte_node(struct irdma_cm_core *cm_core, 2042 struct irdma_cm_node *cm_node) 2043 { 2044 unsigned long flags; 2045 u32 key = (cm_node->rem_port << 16) | cm_node->loc_port; 2046 2047 spin_lock_irqsave(&cm_core->ht_lock, flags); 2048 HASH_ADD_RCU(cm_core->cm_hash_tbl, &cm_node->list, key); 2049 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 2050 } 2051 2052 /** 2053 * irdma_ipv4_is_lpb - check if loopback 2054 * @loc_addr: local addr to compare 2055 * @rem_addr: remote address 2056 */ 2057 bool 2058 irdma_ipv4_is_lpb(struct vnet *vnet, u32 loc_addr, u32 rem_addr) 2059 { 2060 bool ret; 2061 2062 CURVNET_SET_QUIET(vnet); 2063 ret = ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr); 2064 CURVNET_RESTORE(); 2065 2066 return (ret); 2067 } 2068 2069 /** 2070 * irdma_ipv6_is_lpb - check if loopback 2071 * @loc_addr: local addr to compare 2072 * @rem_addr: remote address 2073 */ 2074 bool 2075 irdma_ipv6_is_lpb(u32 *loc_addr, u32 *rem_addr) 2076 { 2077 struct in6_addr raddr6; 2078 2079 irdma_copy_ip_htonl(raddr6.__u6_addr.__u6_addr32, rem_addr); 2080 2081 return !memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6); 2082 } 2083 2084 /** 2085 * irdma_cm_create_ah - create a cm address handle 2086 * @cm_node: The connection manager node to create AH for 2087 * @wait: Provides option to wait for ah creation or not 2088 */ 2089 static int 2090 irdma_cm_create_ah(struct irdma_cm_node *cm_node, bool wait) 2091 { 2092 struct rdma_cm_id *rdma_id = (struct rdma_cm_id *)cm_node->cm_id->context; 2093 struct vnet *vnet = rdma_id->route.addr.dev_addr.net; 2094 struct irdma_ah_info ah_info = {0}; 2095 struct irdma_device *iwdev = cm_node->iwdev; 2096 2097 ether_addr_copy(ah_info.mac_addr, IF_LLADDR(iwdev->netdev)); 2098 2099 ah_info.hop_ttl = 0x40; 2100 ah_info.tc_tos = cm_node->tos; 2101 ah_info.vsi = &iwdev->vsi; 2102 2103 if (cm_node->ipv4) { 2104 ah_info.ipv4_valid = true; 2105 ah_info.dest_ip_addr[0] = cm_node->rem_addr[0]; 2106 ah_info.src_ip_addr[0] = cm_node->loc_addr[0]; 2107 ah_info.do_lpbk = irdma_ipv4_is_lpb(vnet, 2108 ah_info.src_ip_addr[0], 2109 ah_info.dest_ip_addr[0]); 2110 } else { 2111 memcpy(ah_info.dest_ip_addr, cm_node->rem_addr, 2112 sizeof(ah_info.dest_ip_addr)); 2113 memcpy(ah_info.src_ip_addr, cm_node->loc_addr, 2114 sizeof(ah_info.src_ip_addr)); 2115 ah_info.do_lpbk = irdma_ipv6_is_lpb(ah_info.src_ip_addr, 2116 ah_info.dest_ip_addr); 2117 } 2118 2119 ah_info.vlan_tag = cm_node->vlan_id; 2120 if (cm_node->vlan_id < VLAN_N_VID) { 2121 ah_info.insert_vlan_tag = 1; 2122 ah_info.vlan_tag |= cm_node->user_pri << VLAN_PRIO_SHIFT; 2123 } 2124 2125 ah_info.dst_arpindex = 2126 irdma_arp_table(iwdev->rf, ah_info.dest_ip_addr, 2127 NULL, IRDMA_ARP_RESOLVE); 2128 2129 if (irdma_puda_create_ah(&iwdev->rf->sc_dev, &ah_info, wait, 2130 IRDMA_PUDA_RSRC_TYPE_ILQ, cm_node, 2131 &cm_node->ah)) 2132 return -ENOMEM; 2133 2134 return 0; 2135 } 2136 2137 /** 2138 * irdma_cm_free_ah - free a cm address handle 2139 * @cm_node: The connection manager node to create AH for 2140 */ 2141 static void 2142 irdma_cm_free_ah(struct irdma_cm_node *cm_node) 2143 { 2144 struct irdma_device *iwdev = cm_node->iwdev; 2145 2146 irdma_puda_free_ah(&iwdev->rf->sc_dev, cm_node->ah); 2147 cm_node->ah = NULL; 2148 } 2149 2150 /** 2151 * irdma_make_cm_node - create a new instance of a cm node 2152 * @cm_core: cm's core 2153 * @iwdev: iwarp device structure 2154 * @cm_info: quad info for connection 2155 * @listener: passive connection's listener 2156 */ 2157 static struct irdma_cm_node * 2158 irdma_make_cm_node(struct irdma_cm_core *cm_core, struct irdma_device *iwdev, 2159 struct irdma_cm_info *cm_info, 2160 struct irdma_cm_listener *listener) 2161 { 2162 struct irdma_cm_node *cm_node; 2163 int arpindex; 2164 struct ifnet *netdev = iwdev->netdev; 2165 2166 /* create an hte and cm_node for this instance */ 2167 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC); 2168 if (!cm_node) 2169 return NULL; 2170 2171 /* set our node specific transport info */ 2172 cm_node->ipv4 = cm_info->ipv4; 2173 cm_node->vlan_id = cm_info->vlan_id; 2174 if (cm_node->vlan_id >= VLAN_N_VID && iwdev->dcb_vlan_mode) 2175 cm_node->vlan_id = 0; 2176 cm_node->tos = cm_info->tos; 2177 cm_node->user_pri = cm_info->user_pri; 2178 if (listener) { 2179 if (listener->tos != cm_info->tos) 2180 irdma_dev_warn( 2181 &iwdev->rf->sc_dev, 2182 "application TOS[%d] and remote client TOS[%d] mismatch\n", 2183 listener->tos, cm_info->tos); 2184 if (iwdev->vsi.dscp_mode) { 2185 cm_node->user_pri = listener->user_pri; 2186 } else { 2187 cm_node->tos = max(listener->tos, cm_info->tos); 2188 cm_node->user_pri = rt_tos2priority(cm_node->tos); 2189 } 2190 irdma_debug(iwdev_to_idev(iwdev), IRDMA_DEBUG_DCB, 2191 "listener: TOS:[%d] UP:[%d]\n", cm_node->tos, 2192 cm_node->user_pri); 2193 } 2194 memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr)); 2195 memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr)); 2196 cm_node->loc_port = cm_info->loc_port; 2197 cm_node->rem_port = cm_info->rem_port; 2198 2199 cm_node->mpa_frame_rev = IRDMA_CM_DEFAULT_MPA_VER; 2200 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO; 2201 cm_node->iwdev = iwdev; 2202 cm_node->dev = &iwdev->rf->sc_dev; 2203 2204 cm_node->ird_size = cm_node->dev->hw_attrs.max_hw_ird; 2205 cm_node->ord_size = cm_node->dev->hw_attrs.max_hw_ord; 2206 2207 cm_node->listener = listener; 2208 cm_node->cm_id = cm_info->cm_id; 2209 ether_addr_copy(cm_node->loc_mac, IF_LLADDR(netdev)); 2210 spin_lock_init(&cm_node->retrans_list_lock); 2211 cm_node->ack_rcvd = false; 2212 2213 init_completion(&cm_node->establish_comp); 2214 atomic_set(&cm_node->refcnt, 1); 2215 /* associate our parent CM core */ 2216 cm_node->cm_core = cm_core; 2217 cm_node->tcp_cntxt.loc_id = IRDMA_CM_DEFAULT_LOCAL_ID; 2218 cm_node->tcp_cntxt.rcv_wscale = iwdev->rcv_wscale; 2219 cm_node->tcp_cntxt.rcv_wnd = iwdev->rcv_wnd >> cm_node->tcp_cntxt.rcv_wscale; 2220 kc_set_loc_seq_num_mss(cm_node); 2221 2222 arpindex = irdma_resolve_neigh_lpb_chk(iwdev, cm_node, cm_info); 2223 if (arpindex < 0) 2224 goto err; 2225 2226 ether_addr_copy(cm_node->rem_mac, iwdev->rf->arp_table[arpindex].mac_addr); 2227 irdma_add_hte_node(cm_core, cm_node); 2228 cm_core->stats_nodes_created++; 2229 return cm_node; 2230 2231 err: 2232 kfree(cm_node); 2233 2234 return NULL; 2235 } 2236 2237 static void 2238 irdma_cm_node_free_cb(struct rcu_head *rcu_head) 2239 { 2240 struct irdma_cm_node *cm_node = 2241 container_of(rcu_head, struct irdma_cm_node, rcu_head); 2242 struct irdma_cm_core *cm_core = cm_node->cm_core; 2243 struct irdma_qp *iwqp; 2244 struct irdma_cm_info nfo; 2245 2246 /* if the node is destroyed before connection was accelerated */ 2247 if (!cm_node->accelerated && cm_node->accept_pend) { 2248 irdma_debug(iwdev_to_idev(cm_node->iwdev), IRDMA_DEBUG_CM, 2249 "node destroyed before established\n"); 2250 atomic_dec(&cm_node->listener->pend_accepts_cnt); 2251 } 2252 if (cm_node->close_entry) 2253 irdma_handle_close_entry(cm_node, 0); 2254 if (cm_node->listener) { 2255 irdma_dec_refcnt_listen(cm_core, cm_node->listener, 0, true); 2256 } else { 2257 if (cm_node->apbvt_set) { 2258 irdma_del_apbvt(cm_node->iwdev, cm_node->apbvt_entry); 2259 cm_node->apbvt_set = 0; 2260 } 2261 irdma_get_addr_info(cm_node, &nfo); 2262 if (cm_node->qhash_set) { 2263 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id; 2264 irdma_manage_qhash(cm_node->iwdev, &nfo, 2265 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 2266 IRDMA_QHASH_MANAGE_TYPE_DELETE, NULL, 2267 false); 2268 cm_node->qhash_set = 0; 2269 } 2270 } 2271 2272 iwqp = cm_node->iwqp; 2273 if (iwqp) { 2274 cm_node->cm_id->rem_ref(cm_node->cm_id); 2275 cm_node->cm_id = NULL; 2276 iwqp->cm_id = NULL; 2277 irdma_qp_rem_ref(&iwqp->ibqp); 2278 cm_node->iwqp = NULL; 2279 } else if (cm_node->qhash_set) { 2280 irdma_get_addr_info(cm_node, &nfo); 2281 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id; 2282 irdma_manage_qhash(cm_node->iwdev, &nfo, 2283 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 2284 IRDMA_QHASH_MANAGE_TYPE_DELETE, NULL, false); 2285 cm_node->qhash_set = 0; 2286 } 2287 2288 cm_core->cm_free_ah(cm_node); 2289 kfree(cm_node); 2290 } 2291 2292 /** 2293 * irdma_rem_ref_cm_node - destroy an instance of a cm node 2294 * @cm_node: connection's node 2295 */ 2296 void 2297 irdma_rem_ref_cm_node(struct irdma_cm_node *cm_node) 2298 { 2299 struct irdma_cm_core *cm_core = cm_node->cm_core; 2300 unsigned long flags; 2301 2302 spin_lock_irqsave(&cm_core->ht_lock, flags); 2303 2304 if (!atomic_dec_and_test(&cm_node->refcnt)) { 2305 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 2306 return; 2307 } 2308 if (cm_node->iwqp) { 2309 cm_node->iwqp->cm_node = NULL; 2310 cm_node->iwqp->cm_id = NULL; 2311 } 2312 HASH_DEL_RCU(cm_core->cm_hash_tbl, &cm_node->list); 2313 cm_node->cm_core->stats_nodes_destroyed++; 2314 2315 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 2316 2317 /* wait for all list walkers to exit their grace period */ 2318 call_rcu(&cm_node->rcu_head, irdma_cm_node_free_cb); 2319 } 2320 2321 /** 2322 * irdma_handle_fin_pkt - FIN packet received 2323 * @cm_node: connection's node 2324 */ 2325 static void 2326 irdma_handle_fin_pkt(struct irdma_cm_node *cm_node) 2327 { 2328 switch (cm_node->state) { 2329 case IRDMA_CM_STATE_SYN_RCVD: 2330 case IRDMA_CM_STATE_SYN_SENT: 2331 case IRDMA_CM_STATE_ESTABLISHED: 2332 case IRDMA_CM_STATE_MPAREJ_RCVD: 2333 cm_node->tcp_cntxt.rcv_nxt++; 2334 irdma_cleanup_retrans_entry(cm_node); 2335 cm_node->state = IRDMA_CM_STATE_LAST_ACK; 2336 irdma_send_fin(cm_node); 2337 break; 2338 case IRDMA_CM_STATE_MPAREQ_SENT: 2339 irdma_create_event(cm_node, IRDMA_CM_EVENT_ABORTED); 2340 cm_node->tcp_cntxt.rcv_nxt++; 2341 irdma_cleanup_retrans_entry(cm_node); 2342 cm_node->state = IRDMA_CM_STATE_CLOSED; 2343 atomic_inc(&cm_node->refcnt); 2344 irdma_send_reset(cm_node); 2345 break; 2346 case IRDMA_CM_STATE_FIN_WAIT1: 2347 cm_node->tcp_cntxt.rcv_nxt++; 2348 irdma_cleanup_retrans_entry(cm_node); 2349 cm_node->state = IRDMA_CM_STATE_CLOSING; 2350 irdma_send_ack(cm_node); 2351 /* 2352 * Wait for ACK as this is simultaneous close. After we receive ACK, do not send anything. Just rm the 2353 * node. 2354 */ 2355 break; 2356 case IRDMA_CM_STATE_FIN_WAIT2: 2357 cm_node->tcp_cntxt.rcv_nxt++; 2358 irdma_cleanup_retrans_entry(cm_node); 2359 cm_node->state = IRDMA_CM_STATE_TIME_WAIT; 2360 irdma_send_ack(cm_node); 2361 irdma_schedule_cm_timer(cm_node, NULL, IRDMA_TIMER_TYPE_CLOSE, 2362 1, 0); 2363 break; 2364 case IRDMA_CM_STATE_TIME_WAIT: 2365 cm_node->tcp_cntxt.rcv_nxt++; 2366 irdma_cleanup_retrans_entry(cm_node); 2367 cm_node->state = IRDMA_CM_STATE_CLOSED; 2368 irdma_rem_ref_cm_node(cm_node); 2369 break; 2370 case IRDMA_CM_STATE_OFFLOADED: 2371 default: 2372 irdma_debug(iwdev_to_idev(cm_node->iwdev), IRDMA_DEBUG_CM, 2373 "bad state node state = %d\n", cm_node->state); 2374 break; 2375 } 2376 } 2377 2378 /** 2379 * irdma_handle_rst_pkt - process received RST packet 2380 * @cm_node: connection's node 2381 * @rbuf: receive buffer 2382 */ 2383 static void 2384 irdma_handle_rst_pkt(struct irdma_cm_node *cm_node, 2385 struct irdma_puda_buf *rbuf) 2386 { 2387 irdma_debug(iwdev_to_idev(cm_node->iwdev), IRDMA_DEBUG_CM, 2388 "caller: %pS cm_node=%p state=%d rem_port=0x%04x loc_port=0x%04x rem_addr=%pI4 loc_addr=%pI4\n", 2389 __builtin_return_address(0), cm_node, cm_node->state, 2390 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr, cm_node->loc_addr); 2391 2392 irdma_cleanup_retrans_entry(cm_node); 2393 switch (cm_node->state) { 2394 case IRDMA_CM_STATE_SYN_SENT: 2395 case IRDMA_CM_STATE_MPAREQ_SENT: 2396 switch (cm_node->mpa_frame_rev) { 2397 case IETF_MPA_V2: 2398 /* Drop down to MPA_V1 */ 2399 cm_node->mpa_frame_rev = IETF_MPA_V1; 2400 /* send a syn and goto syn sent state */ 2401 cm_node->state = IRDMA_CM_STATE_SYN_SENT; 2402 if (irdma_send_syn(cm_node, 0)) 2403 irdma_active_open_err(cm_node, false); 2404 break; 2405 case IETF_MPA_V1: 2406 default: 2407 irdma_active_open_err(cm_node, false); 2408 break; 2409 } 2410 break; 2411 case IRDMA_CM_STATE_MPAREQ_RCVD: 2412 atomic_inc(&cm_node->passive_state); 2413 break; 2414 case IRDMA_CM_STATE_ESTABLISHED: 2415 case IRDMA_CM_STATE_SYN_RCVD: 2416 case IRDMA_CM_STATE_LISTENING: 2417 irdma_passive_open_err(cm_node, false); 2418 break; 2419 case IRDMA_CM_STATE_OFFLOADED: 2420 irdma_active_open_err(cm_node, false); 2421 break; 2422 case IRDMA_CM_STATE_CLOSED: 2423 break; 2424 case IRDMA_CM_STATE_FIN_WAIT2: 2425 case IRDMA_CM_STATE_FIN_WAIT1: 2426 case IRDMA_CM_STATE_LAST_ACK: 2427 case IRDMA_CM_STATE_TIME_WAIT: 2428 cm_node->state = IRDMA_CM_STATE_CLOSED; 2429 irdma_rem_ref_cm_node(cm_node); 2430 break; 2431 default: 2432 break; 2433 } 2434 } 2435 2436 /** 2437 * irdma_handle_rcv_mpa - Process a recv'd mpa buffer 2438 * @cm_node: connection's node 2439 * @rbuf: receive buffer 2440 */ 2441 static void 2442 irdma_handle_rcv_mpa(struct irdma_cm_node *cm_node, 2443 struct irdma_puda_buf *rbuf) 2444 { 2445 int err; 2446 int datasize = rbuf->datalen; 2447 u8 *dataloc = rbuf->data; 2448 2449 enum irdma_cm_event_type type = IRDMA_CM_EVENT_UNKNOWN; 2450 u32 res_type; 2451 2452 err = irdma_parse_mpa(cm_node, dataloc, &res_type, datasize); 2453 if (err) { 2454 if (cm_node->state == IRDMA_CM_STATE_MPAREQ_SENT) 2455 irdma_active_open_err(cm_node, true); 2456 else 2457 irdma_passive_open_err(cm_node, true); 2458 return; 2459 } 2460 2461 switch (cm_node->state) { 2462 case IRDMA_CM_STATE_ESTABLISHED: 2463 if (res_type == IRDMA_MPA_REQUEST_REJECT) 2464 irdma_debug(iwdev_to_idev(cm_node->iwdev), 2465 IRDMA_DEBUG_CM, "state for reject\n"); 2466 cm_node->state = IRDMA_CM_STATE_MPAREQ_RCVD; 2467 type = IRDMA_CM_EVENT_MPA_REQ; 2468 irdma_send_ack(cm_node); /* ACK received MPA request */ 2469 atomic_set(&cm_node->passive_state, 2470 IRDMA_PASSIVE_STATE_INDICATED); 2471 break; 2472 case IRDMA_CM_STATE_MPAREQ_SENT: 2473 irdma_cleanup_retrans_entry(cm_node); 2474 if (res_type == IRDMA_MPA_REQUEST_REJECT) { 2475 type = IRDMA_CM_EVENT_MPA_REJECT; 2476 cm_node->state = IRDMA_CM_STATE_MPAREJ_RCVD; 2477 } else { 2478 type = IRDMA_CM_EVENT_CONNECTED; 2479 cm_node->state = IRDMA_CM_STATE_OFFLOADED; 2480 } 2481 irdma_send_ack(cm_node); 2482 break; 2483 default: 2484 irdma_debug(iwdev_to_idev(cm_node->iwdev), IRDMA_DEBUG_CM, 2485 "wrong cm_node state =%d\n", cm_node->state); 2486 break; 2487 } 2488 irdma_create_event(cm_node, type); 2489 } 2490 2491 /** 2492 * irdma_check_syn - Check for error on received syn ack 2493 * @cm_node: connection's node 2494 * @tcph: pointer tcp header 2495 */ 2496 static int 2497 irdma_check_syn(struct irdma_cm_node *cm_node, struct tcphdr *tcph) 2498 { 2499 if (ntohl(tcph->th_ack) != cm_node->tcp_cntxt.loc_seq_num) { 2500 irdma_active_open_err(cm_node, true); 2501 return 1; 2502 } 2503 2504 return 0; 2505 } 2506 2507 /** 2508 * irdma_check_seq - check seq numbers if OK 2509 * @cm_node: connection's node 2510 * @tcph: pointer tcp header 2511 */ 2512 static int 2513 irdma_check_seq(struct irdma_cm_node *cm_node, struct tcphdr *tcph) 2514 { 2515 u32 seq; 2516 u32 ack_seq; 2517 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num; 2518 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt; 2519 u32 rcv_wnd; 2520 int err = 0; 2521 2522 seq = ntohl(tcph->th_seq); 2523 ack_seq = ntohl(tcph->th_ack); 2524 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd; 2525 if (ack_seq != loc_seq_num || 2526 !between(seq, rcv_nxt, (rcv_nxt + rcv_wnd))) 2527 err = -1; 2528 if (err) 2529 irdma_debug(iwdev_to_idev(cm_node->iwdev), IRDMA_DEBUG_CM, 2530 "seq number err\n"); 2531 2532 return err; 2533 } 2534 2535 void 2536 irdma_add_conn_est_qh(struct irdma_cm_node *cm_node) 2537 { 2538 struct irdma_cm_info nfo; 2539 2540 irdma_get_addr_info(cm_node, &nfo); 2541 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id; 2542 irdma_manage_qhash(cm_node->iwdev, &nfo, 2543 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 2544 IRDMA_QHASH_MANAGE_TYPE_ADD, 2545 cm_node, false); 2546 cm_node->qhash_set = true; 2547 } 2548 2549 /** 2550 * irdma_handle_syn_pkt - is for Passive node 2551 * @cm_node: connection's node 2552 * @rbuf: receive buffer 2553 */ 2554 static void 2555 irdma_handle_syn_pkt(struct irdma_cm_node *cm_node, 2556 struct irdma_puda_buf *rbuf) 2557 { 2558 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2559 int err; 2560 u32 inc_sequence; 2561 int optionsize; 2562 2563 optionsize = (tcph->th_off << 2) - sizeof(struct tcphdr); 2564 inc_sequence = ntohl(tcph->th_seq); 2565 2566 switch (cm_node->state) { 2567 case IRDMA_CM_STATE_SYN_SENT: 2568 case IRDMA_CM_STATE_MPAREQ_SENT: 2569 /* Rcvd syn on active open connection */ 2570 irdma_active_open_err(cm_node, 1); 2571 break; 2572 case IRDMA_CM_STATE_LISTENING: 2573 /* Passive OPEN */ 2574 if (atomic_read(&cm_node->listener->pend_accepts_cnt) > 2575 cm_node->listener->backlog) { 2576 cm_node->cm_core->stats_backlog_drops++; 2577 irdma_passive_open_err(cm_node, false); 2578 break; 2579 } 2580 err = irdma_handle_tcp_options(cm_node, tcph, optionsize, 1); 2581 if (err) { 2582 irdma_passive_open_err(cm_node, false); 2583 /* drop pkt */ 2584 break; 2585 } 2586 err = cm_node->cm_core->cm_create_ah(cm_node, false); 2587 if (err) { 2588 irdma_passive_open_err(cm_node, false); 2589 /* drop pkt */ 2590 break; 2591 } 2592 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; 2593 cm_node->accept_pend = 1; 2594 atomic_inc(&cm_node->listener->pend_accepts_cnt); 2595 2596 cm_node->state = IRDMA_CM_STATE_SYN_RCVD; 2597 break; 2598 case IRDMA_CM_STATE_CLOSED: 2599 irdma_cleanup_retrans_entry(cm_node); 2600 atomic_inc(&cm_node->refcnt); 2601 irdma_send_reset(cm_node); 2602 break; 2603 case IRDMA_CM_STATE_OFFLOADED: 2604 case IRDMA_CM_STATE_ESTABLISHED: 2605 case IRDMA_CM_STATE_FIN_WAIT1: 2606 case IRDMA_CM_STATE_FIN_WAIT2: 2607 case IRDMA_CM_STATE_MPAREQ_RCVD: 2608 case IRDMA_CM_STATE_LAST_ACK: 2609 case IRDMA_CM_STATE_CLOSING: 2610 case IRDMA_CM_STATE_UNKNOWN: 2611 default: 2612 break; 2613 } 2614 } 2615 2616 /** 2617 * irdma_handle_synack_pkt - Process SYN+ACK packet (active side) 2618 * @cm_node: connection's node 2619 * @rbuf: receive buffer 2620 */ 2621 static void 2622 irdma_handle_synack_pkt(struct irdma_cm_node *cm_node, 2623 struct irdma_puda_buf *rbuf) 2624 { 2625 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2626 int err; 2627 u32 inc_sequence; 2628 int optionsize; 2629 2630 optionsize = (tcph->th_off << 2) - sizeof(struct tcphdr); 2631 inc_sequence = ntohl(tcph->th_seq); 2632 switch (cm_node->state) { 2633 case IRDMA_CM_STATE_SYN_SENT: 2634 irdma_cleanup_retrans_entry(cm_node); 2635 /* active open */ 2636 if (irdma_check_syn(cm_node, tcph)) { 2637 irdma_debug(iwdev_to_idev(cm_node->iwdev), 2638 IRDMA_DEBUG_CM, "check syn fail\n"); 2639 return; 2640 } 2641 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->th_ack); 2642 /* setup options */ 2643 err = irdma_handle_tcp_options(cm_node, tcph, optionsize, 0); 2644 if (err) { 2645 irdma_debug(iwdev_to_idev(cm_node->iwdev), 2646 IRDMA_DEBUG_CM, 2647 "cm_node=%p tcp_options failed\n", 2648 cm_node); 2649 break; 2650 } 2651 irdma_cleanup_retrans_entry(cm_node); 2652 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; 2653 irdma_send_ack(cm_node); /* ACK for the syn_ack */ 2654 err = irdma_send_mpa_request(cm_node); 2655 if (err) { 2656 irdma_debug(iwdev_to_idev(cm_node->iwdev), 2657 IRDMA_DEBUG_CM, 2658 "cm_node=%p irdma_send_mpa_request failed\n", 2659 cm_node); 2660 break; 2661 } 2662 cm_node->state = IRDMA_CM_STATE_MPAREQ_SENT; 2663 break; 2664 case IRDMA_CM_STATE_MPAREQ_RCVD: 2665 irdma_passive_open_err(cm_node, true); 2666 break; 2667 case IRDMA_CM_STATE_LISTENING: 2668 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->th_ack); 2669 irdma_cleanup_retrans_entry(cm_node); 2670 cm_node->state = IRDMA_CM_STATE_CLOSED; 2671 irdma_send_reset(cm_node); 2672 break; 2673 case IRDMA_CM_STATE_CLOSED: 2674 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->th_ack); 2675 irdma_cleanup_retrans_entry(cm_node); 2676 atomic_inc(&cm_node->refcnt); 2677 irdma_send_reset(cm_node); 2678 break; 2679 case IRDMA_CM_STATE_ESTABLISHED: 2680 case IRDMA_CM_STATE_FIN_WAIT1: 2681 case IRDMA_CM_STATE_FIN_WAIT2: 2682 case IRDMA_CM_STATE_LAST_ACK: 2683 case IRDMA_CM_STATE_OFFLOADED: 2684 case IRDMA_CM_STATE_CLOSING: 2685 case IRDMA_CM_STATE_UNKNOWN: 2686 case IRDMA_CM_STATE_MPAREQ_SENT: 2687 default: 2688 break; 2689 } 2690 } 2691 2692 /** 2693 * irdma_handle_ack_pkt - process packet with ACK 2694 * @cm_node: connection's node 2695 * @rbuf: receive buffer 2696 */ 2697 static int 2698 irdma_handle_ack_pkt(struct irdma_cm_node *cm_node, 2699 struct irdma_puda_buf *rbuf) 2700 { 2701 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2702 u32 inc_sequence; 2703 int ret; 2704 int optionsize; 2705 u32 datasize = rbuf->datalen; 2706 2707 optionsize = (tcph->th_off << 2) - sizeof(struct tcphdr); 2708 2709 if (irdma_check_seq(cm_node, tcph)) 2710 return -EINVAL; 2711 2712 inc_sequence = ntohl(tcph->th_seq); 2713 switch (cm_node->state) { 2714 case IRDMA_CM_STATE_SYN_RCVD: 2715 irdma_cleanup_retrans_entry(cm_node); 2716 ret = irdma_handle_tcp_options(cm_node, tcph, optionsize, 1); 2717 if (ret) 2718 return ret; 2719 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->th_ack); 2720 cm_node->state = IRDMA_CM_STATE_ESTABLISHED; 2721 if (datasize) { 2722 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; 2723 irdma_handle_rcv_mpa(cm_node, rbuf); 2724 } 2725 break; 2726 case IRDMA_CM_STATE_ESTABLISHED: 2727 irdma_cleanup_retrans_entry(cm_node); 2728 if (datasize) { 2729 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; 2730 irdma_handle_rcv_mpa(cm_node, rbuf); 2731 } 2732 break; 2733 case IRDMA_CM_STATE_MPAREQ_SENT: 2734 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->th_ack); 2735 if (datasize) { 2736 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; 2737 cm_node->ack_rcvd = false; 2738 irdma_handle_rcv_mpa(cm_node, rbuf); 2739 } else { 2740 cm_node->ack_rcvd = true; 2741 } 2742 break; 2743 case IRDMA_CM_STATE_LISTENING: 2744 irdma_cleanup_retrans_entry(cm_node); 2745 cm_node->state = IRDMA_CM_STATE_CLOSED; 2746 irdma_send_reset(cm_node); 2747 break; 2748 case IRDMA_CM_STATE_CLOSED: 2749 irdma_cleanup_retrans_entry(cm_node); 2750 atomic_inc(&cm_node->refcnt); 2751 irdma_send_reset(cm_node); 2752 break; 2753 case IRDMA_CM_STATE_LAST_ACK: 2754 case IRDMA_CM_STATE_CLOSING: 2755 irdma_cleanup_retrans_entry(cm_node); 2756 cm_node->state = IRDMA_CM_STATE_CLOSED; 2757 irdma_rem_ref_cm_node(cm_node); 2758 break; 2759 case IRDMA_CM_STATE_FIN_WAIT1: 2760 irdma_cleanup_retrans_entry(cm_node); 2761 cm_node->state = IRDMA_CM_STATE_FIN_WAIT2; 2762 break; 2763 case IRDMA_CM_STATE_SYN_SENT: 2764 case IRDMA_CM_STATE_FIN_WAIT2: 2765 case IRDMA_CM_STATE_OFFLOADED: 2766 case IRDMA_CM_STATE_MPAREQ_RCVD: 2767 case IRDMA_CM_STATE_UNKNOWN: 2768 default: 2769 irdma_cleanup_retrans_entry(cm_node); 2770 break; 2771 } 2772 2773 return 0; 2774 } 2775 2776 /** 2777 * irdma_process_pkt - process cm packet 2778 * @cm_node: connection's node 2779 * @rbuf: receive buffer 2780 */ 2781 static void 2782 irdma_process_pkt(struct irdma_cm_node *cm_node, 2783 struct irdma_puda_buf *rbuf) 2784 { 2785 enum irdma_tcpip_pkt_type pkt_type = IRDMA_PKT_TYPE_UNKNOWN; 2786 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2787 u32 fin_set = 0; 2788 int err; 2789 2790 if (tcph->th_flags & TH_RST) { 2791 pkt_type = IRDMA_PKT_TYPE_RST; 2792 } else if (tcph->th_flags & TH_SYN) { 2793 pkt_type = IRDMA_PKT_TYPE_SYN; 2794 if (tcph->th_flags & TH_ACK) 2795 pkt_type = IRDMA_PKT_TYPE_SYNACK; 2796 } else if (tcph->th_flags & TH_ACK) { 2797 pkt_type = IRDMA_PKT_TYPE_ACK; 2798 } 2799 if (tcph->th_flags & TH_FIN) 2800 fin_set = 1; 2801 2802 switch (pkt_type) { 2803 case IRDMA_PKT_TYPE_SYN: 2804 irdma_handle_syn_pkt(cm_node, rbuf); 2805 break; 2806 case IRDMA_PKT_TYPE_SYNACK: 2807 irdma_handle_synack_pkt(cm_node, rbuf); 2808 break; 2809 case IRDMA_PKT_TYPE_ACK: 2810 err = irdma_handle_ack_pkt(cm_node, rbuf); 2811 if (fin_set && !err) 2812 irdma_handle_fin_pkt(cm_node); 2813 break; 2814 case IRDMA_PKT_TYPE_RST: 2815 irdma_handle_rst_pkt(cm_node, rbuf); 2816 break; 2817 default: 2818 if (fin_set && 2819 (!irdma_check_seq(cm_node, (struct tcphdr *)rbuf->tcph))) 2820 irdma_handle_fin_pkt(cm_node); 2821 break; 2822 } 2823 } 2824 2825 /** 2826 * irdma_make_listen_node - create a listen node with params 2827 * @cm_core: cm's core 2828 * @iwdev: iwarp device structure 2829 * @cm_info: quad info for connection 2830 */ 2831 static struct irdma_cm_listener * 2832 irdma_make_listen_node(struct irdma_cm_core *cm_core, 2833 struct irdma_device *iwdev, 2834 struct irdma_cm_info *cm_info) 2835 { 2836 struct irdma_cm_listener *listener; 2837 unsigned long flags; 2838 2839 /* cannot have multiple matching listeners */ 2840 listener = irdma_find_listener(cm_core, cm_info->loc_addr, 2841 cm_info->loc_port, cm_info->vlan_id, 2842 IRDMA_CM_LISTENER_EITHER_STATE); 2843 if (listener && 2844 listener->listener_state == IRDMA_CM_LISTENER_ACTIVE_STATE) { 2845 atomic_dec(&listener->refcnt); 2846 return NULL; 2847 } 2848 2849 if (!listener) { 2850 /* 2851 * create a CM listen node 1/2 node to compare incoming traffic to 2852 */ 2853 listener = kzalloc(sizeof(*listener), GFP_KERNEL); 2854 if (!listener) 2855 return NULL; 2856 cm_core->stats_listen_nodes_created++; 2857 memcpy(listener->loc_addr, cm_info->loc_addr, 2858 sizeof(listener->loc_addr)); 2859 listener->loc_port = cm_info->loc_port; 2860 2861 INIT_LIST_HEAD(&listener->child_listen_list); 2862 2863 atomic_set(&listener->refcnt, 1); 2864 } else { 2865 listener->reused_node = 1; 2866 } 2867 2868 listener->cm_id = cm_info->cm_id; 2869 listener->ipv4 = cm_info->ipv4; 2870 listener->vlan_id = cm_info->vlan_id; 2871 atomic_set(&listener->pend_accepts_cnt, 0); 2872 listener->cm_core = cm_core; 2873 listener->iwdev = iwdev; 2874 2875 listener->backlog = cm_info->backlog; 2876 listener->listener_state = IRDMA_CM_LISTENER_ACTIVE_STATE; 2877 2878 if (!listener->reused_node) { 2879 spin_lock_irqsave(&cm_core->listen_list_lock, flags); 2880 list_add(&listener->list, &cm_core->listen_list); 2881 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); 2882 } 2883 2884 return listener; 2885 } 2886 2887 /** 2888 * irdma_create_cm_node - make a connection node with params 2889 * @cm_core: cm's core 2890 * @iwdev: iwarp device structure 2891 * @conn_param: connection parameters 2892 * @cm_info: quad info for connection 2893 * @caller_cm_node: pointer to cm_node structure to return 2894 */ 2895 static int 2896 irdma_create_cm_node(struct irdma_cm_core *cm_core, 2897 struct irdma_device *iwdev, 2898 struct iw_cm_conn_param *conn_param, 2899 struct irdma_cm_info *cm_info, 2900 struct irdma_cm_node **caller_cm_node) 2901 { 2902 struct irdma_cm_node *cm_node; 2903 u16 private_data_len = conn_param->private_data_len; 2904 const void *private_data = conn_param->private_data; 2905 2906 /* create a CM connection node */ 2907 cm_node = irdma_make_cm_node(cm_core, iwdev, cm_info, NULL); 2908 if (!cm_node) 2909 return -ENOMEM; 2910 2911 /* set our node side to client (active) side */ 2912 cm_node->tcp_cntxt.client = 1; 2913 cm_node->tcp_cntxt.rcv_wscale = IRDMA_CM_DEFAULT_RCV_WND_SCALE; 2914 2915 irdma_record_ird_ord(cm_node, conn_param->ird, conn_param->ord); 2916 2917 cm_node->pdata.size = private_data_len; 2918 cm_node->pdata.addr = cm_node->pdata_buf; 2919 2920 memcpy(cm_node->pdata_buf, private_data, private_data_len); 2921 *caller_cm_node = cm_node; 2922 2923 return 0; 2924 } 2925 2926 /** 2927 * irdma_cm_reject - reject and teardown a connection 2928 * @cm_node: connection's node 2929 * @pdata: ptr to private data for reject 2930 * @plen: size of private data 2931 */ 2932 static int 2933 irdma_cm_reject(struct irdma_cm_node *cm_node, const void *pdata, 2934 u8 plen) 2935 { 2936 int ret; 2937 int passive_state; 2938 2939 if (cm_node->tcp_cntxt.client) 2940 return 0; 2941 2942 irdma_cleanup_retrans_entry(cm_node); 2943 2944 passive_state = atomic_add_return(1, &cm_node->passive_state); 2945 if (passive_state == IRDMA_SEND_RESET_EVENT) { 2946 cm_node->state = IRDMA_CM_STATE_CLOSED; 2947 irdma_rem_ref_cm_node(cm_node); 2948 return 0; 2949 } 2950 2951 if (cm_node->state == IRDMA_CM_STATE_LISTENER_DESTROYED) { 2952 irdma_rem_ref_cm_node(cm_node); 2953 return 0; 2954 } 2955 2956 ret = irdma_send_mpa_reject(cm_node, pdata, plen); 2957 if (!ret) 2958 return 0; 2959 2960 cm_node->state = IRDMA_CM_STATE_CLOSED; 2961 if (irdma_send_reset(cm_node)) 2962 irdma_debug(iwdev_to_idev(cm_node->iwdev), IRDMA_DEBUG_CM, 2963 "send reset failed\n"); 2964 2965 return ret; 2966 } 2967 2968 /** 2969 * irdma_cm_close - close of cm connection 2970 * @cm_node: connection's node 2971 */ 2972 static int 2973 irdma_cm_close(struct irdma_cm_node *cm_node) 2974 { 2975 switch (cm_node->state) { 2976 case IRDMA_CM_STATE_SYN_RCVD: 2977 case IRDMA_CM_STATE_SYN_SENT: 2978 case IRDMA_CM_STATE_ONE_SIDE_ESTABLISHED: 2979 case IRDMA_CM_STATE_ESTABLISHED: 2980 case IRDMA_CM_STATE_ACCEPTING: 2981 case IRDMA_CM_STATE_MPAREQ_SENT: 2982 case IRDMA_CM_STATE_MPAREQ_RCVD: 2983 irdma_cleanup_retrans_entry(cm_node); 2984 irdma_send_reset(cm_node); 2985 break; 2986 case IRDMA_CM_STATE_CLOSE_WAIT: 2987 cm_node->state = IRDMA_CM_STATE_LAST_ACK; 2988 irdma_send_fin(cm_node); 2989 break; 2990 case IRDMA_CM_STATE_FIN_WAIT1: 2991 case IRDMA_CM_STATE_FIN_WAIT2: 2992 case IRDMA_CM_STATE_LAST_ACK: 2993 case IRDMA_CM_STATE_TIME_WAIT: 2994 case IRDMA_CM_STATE_CLOSING: 2995 return -EINVAL; 2996 case IRDMA_CM_STATE_LISTENING: 2997 irdma_cleanup_retrans_entry(cm_node); 2998 irdma_send_reset(cm_node); 2999 break; 3000 case IRDMA_CM_STATE_MPAREJ_RCVD: 3001 case IRDMA_CM_STATE_UNKNOWN: 3002 case IRDMA_CM_STATE_INITED: 3003 case IRDMA_CM_STATE_CLOSED: 3004 case IRDMA_CM_STATE_LISTENER_DESTROYED: 3005 irdma_rem_ref_cm_node(cm_node); 3006 break; 3007 case IRDMA_CM_STATE_OFFLOADED: 3008 if (cm_node->send_entry) 3009 irdma_debug(iwdev_to_idev(cm_node->iwdev), 3010 IRDMA_DEBUG_CM, 3011 "CM send_entry in OFFLOADED state\n"); 3012 irdma_rem_ref_cm_node(cm_node); 3013 break; 3014 } 3015 3016 return 0; 3017 } 3018 3019 /** 3020 * irdma_receive_ilq - recv an ETHERNET packet, and process it 3021 * through CM 3022 * @vsi: VSI structure of dev 3023 * @rbuf: receive buffer 3024 */ 3025 void 3026 irdma_receive_ilq(struct irdma_sc_vsi *vsi, struct irdma_puda_buf *rbuf) 3027 { 3028 struct irdma_cm_node *cm_node; 3029 struct irdma_cm_listener *listener; 3030 struct ip *iph; 3031 struct ip6_hdr *ip6h; 3032 struct tcphdr *tcph; 3033 struct irdma_cm_info cm_info = {0}; 3034 struct irdma_device *iwdev = vsi->back_vsi; 3035 struct irdma_cm_core *cm_core = &iwdev->cm_core; 3036 struct ether_vlan_header *ethh; 3037 u16 vtag; 3038 3039 /* if vlan, then maclen = 18 else 14 */ 3040 iph = (struct ip *)rbuf->iph; 3041 irdma_debug_buf(vsi->dev, IRDMA_DEBUG_ILQ, "RECEIVE ILQ BUFFER", 3042 rbuf->mem.va, rbuf->totallen); 3043 if (iwdev->rf->sc_dev.hw_attrs.uk_attrs.hw_rev >= IRDMA_GEN_2) { 3044 if (rbuf->vlan_valid) { 3045 vtag = rbuf->vlan_id; 3046 cm_info.user_pri = (vtag & EVL_PRI_MASK) >> 3047 VLAN_PRIO_SHIFT; 3048 cm_info.vlan_id = vtag & EVL_VLID_MASK; 3049 } else { 3050 cm_info.vlan_id = 0xFFFF; 3051 } 3052 } else { 3053 ethh = rbuf->mem.va; 3054 3055 if (ethh->evl_proto == htons(ETH_P_8021Q)) { 3056 vtag = ntohs(ethh->evl_tag); 3057 cm_info.user_pri = (vtag & EVL_PRI_MASK) >> 3058 VLAN_PRIO_SHIFT; 3059 cm_info.vlan_id = vtag & EVL_VLID_MASK; 3060 irdma_debug(iwdev_to_idev(cm_core->iwdev), 3061 IRDMA_DEBUG_CM, "vlan_id=%d\n", 3062 cm_info.vlan_id); 3063 } else { 3064 cm_info.vlan_id = 0xFFFF; 3065 } 3066 } 3067 tcph = (struct tcphdr *)rbuf->tcph; 3068 3069 if (rbuf->ipv4) { 3070 cm_info.loc_addr[0] = ntohl(iph->ip_dst.s_addr); 3071 cm_info.rem_addr[0] = ntohl(iph->ip_src.s_addr); 3072 cm_info.ipv4 = true; 3073 cm_info.tos = iph->ip_tos; 3074 } else { 3075 ip6h = (struct ip6_hdr *)rbuf->iph; 3076 irdma_copy_ip_ntohl(cm_info.loc_addr, 3077 ip6h->ip6_dst.__u6_addr.__u6_addr32); 3078 irdma_copy_ip_ntohl(cm_info.rem_addr, 3079 ip6h->ip6_src.__u6_addr.__u6_addr32); 3080 cm_info.ipv4 = false; 3081 cm_info.tos = (ip6h->ip6_vfc << 4) | ip6h->ip6_flow; 3082 } 3083 cm_info.loc_port = ntohs(tcph->th_dport); 3084 cm_info.rem_port = ntohs(tcph->th_sport); 3085 cm_node = irdma_find_node(cm_core, cm_info.rem_port, cm_info.rem_addr, 3086 cm_info.loc_port, cm_info.loc_addr, cm_info.vlan_id); 3087 3088 if (!cm_node) { 3089 /* 3090 * Only type of packet accepted are for the PASSIVE open (syn only) 3091 */ 3092 if (!(tcph->th_flags & TH_SYN) || tcph->th_flags & TH_ACK) 3093 return; 3094 3095 listener = irdma_find_listener(cm_core, 3096 cm_info.loc_addr, 3097 cm_info.loc_port, 3098 cm_info.vlan_id, 3099 IRDMA_CM_LISTENER_ACTIVE_STATE); 3100 if (!listener) { 3101 cm_info.cm_id = NULL; 3102 irdma_debug(iwdev_to_idev(cm_core->iwdev), 3103 IRDMA_DEBUG_CM, "no listener found\n"); 3104 return; 3105 } 3106 3107 cm_info.cm_id = listener->cm_id; 3108 cm_node = irdma_make_cm_node(cm_core, iwdev, &cm_info, 3109 listener); 3110 if (!cm_node) { 3111 irdma_debug(iwdev_to_idev(cm_core->iwdev), 3112 IRDMA_DEBUG_CM, "allocate node failed\n"); 3113 atomic_dec(&listener->refcnt); 3114 return; 3115 } 3116 3117 if (!(tcph->th_flags & (TH_RST | TH_FIN))) { 3118 cm_node->state = IRDMA_CM_STATE_LISTENING; 3119 } else { 3120 irdma_rem_ref_cm_node(cm_node); 3121 return; 3122 } 3123 3124 atomic_inc(&cm_node->refcnt); 3125 } else if (cm_node->state == IRDMA_CM_STATE_OFFLOADED) { 3126 irdma_rem_ref_cm_node(cm_node); 3127 return; 3128 } 3129 3130 irdma_process_pkt(cm_node, rbuf); 3131 irdma_rem_ref_cm_node(cm_node); 3132 } 3133 3134 static int 3135 irdma_add_qh(struct irdma_cm_node *cm_node, bool active) 3136 { 3137 if (!active) 3138 irdma_add_conn_est_qh(cm_node); 3139 return 0; 3140 } 3141 3142 static void 3143 irdma_cm_free_ah_nop(struct irdma_cm_node *cm_node) 3144 { 3145 } 3146 3147 /** 3148 * irdma_setup_cm_core - setup top level instance of a cm core 3149 * @iwdev: iwarp device structure 3150 * @rdma_ver: HW version 3151 */ 3152 int 3153 irdma_setup_cm_core(struct irdma_device *iwdev, u8 rdma_ver) 3154 { 3155 struct irdma_cm_core *cm_core = &iwdev->cm_core; 3156 3157 cm_core->iwdev = iwdev; 3158 cm_core->dev = &iwdev->rf->sc_dev; 3159 3160 /* Handles CM event work items send to Iwarp core */ 3161 cm_core->event_wq = alloc_ordered_workqueue("iwarp-event-wq", 0); 3162 if (!cm_core->event_wq) 3163 return -ENOMEM; 3164 3165 INIT_LIST_HEAD(&cm_core->listen_list); 3166 3167 timer_setup(&cm_core->tcp_timer, irdma_cm_timer_tick, 0); 3168 3169 spin_lock_init(&cm_core->ht_lock); 3170 spin_lock_init(&cm_core->listen_list_lock); 3171 spin_lock_init(&cm_core->apbvt_lock); 3172 switch (rdma_ver) { 3173 case IRDMA_GEN_1: 3174 cm_core->form_cm_frame = irdma_form_uda_cm_frame; 3175 cm_core->cm_create_ah = irdma_add_qh; 3176 cm_core->cm_free_ah = irdma_cm_free_ah_nop; 3177 break; 3178 case IRDMA_GEN_2: 3179 default: 3180 cm_core->form_cm_frame = irdma_form_ah_cm_frame; 3181 cm_core->cm_create_ah = irdma_cm_create_ah; 3182 cm_core->cm_free_ah = irdma_cm_free_ah; 3183 } 3184 3185 return 0; 3186 } 3187 3188 /** 3189 * irdma_cleanup_cm_core - deallocate a top level instance of a 3190 * cm core 3191 * @cm_core: cm's core 3192 */ 3193 void 3194 irdma_cleanup_cm_core(struct irdma_cm_core *cm_core) 3195 { 3196 unsigned long flags; 3197 3198 if (!cm_core) 3199 return; 3200 3201 spin_lock_irqsave(&cm_core->ht_lock, flags); 3202 if (timer_pending(&cm_core->tcp_timer)) 3203 del_timer_sync(&cm_core->tcp_timer); 3204 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 3205 3206 destroy_workqueue(cm_core->event_wq); 3207 cm_core->dev->ws_reset(&cm_core->iwdev->vsi); 3208 } 3209 3210 /** 3211 * irdma_init_tcp_ctx - setup qp context 3212 * @cm_node: connection's node 3213 * @tcp_info: offload info for tcp 3214 * @iwqp: associate qp for the connection 3215 */ 3216 static void 3217 irdma_init_tcp_ctx(struct irdma_cm_node *cm_node, 3218 struct irdma_tcp_offload_info *tcp_info, 3219 struct irdma_qp *iwqp) 3220 { 3221 tcp_info->ipv4 = cm_node->ipv4; 3222 tcp_info->drop_ooo_seg = !iwqp->iwdev->iw_ooo; 3223 tcp_info->wscale = true; 3224 tcp_info->ignore_tcp_opt = true; 3225 tcp_info->ignore_tcp_uns_opt = true; 3226 tcp_info->no_nagle = false; 3227 3228 tcp_info->ttl = IRDMA_DEFAULT_TTL; 3229 tcp_info->rtt_var = IRDMA_DEFAULT_RTT_VAR; 3230 tcp_info->ss_thresh = IRDMA_DEFAULT_SS_THRESH; 3231 tcp_info->rexmit_thresh = IRDMA_DEFAULT_REXMIT_THRESH; 3232 3233 tcp_info->tcp_state = IRDMA_TCP_STATE_ESTABLISHED; 3234 tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale; 3235 tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale; 3236 3237 tcp_info->snd_nxt = cm_node->tcp_cntxt.loc_seq_num; 3238 tcp_info->snd_wnd = cm_node->tcp_cntxt.snd_wnd; 3239 tcp_info->rcv_nxt = cm_node->tcp_cntxt.rcv_nxt; 3240 tcp_info->snd_max = cm_node->tcp_cntxt.loc_seq_num; 3241 3242 tcp_info->snd_una = cm_node->tcp_cntxt.loc_seq_num; 3243 tcp_info->cwnd = 2 * cm_node->tcp_cntxt.mss; 3244 tcp_info->snd_wl1 = cm_node->tcp_cntxt.rcv_nxt; 3245 tcp_info->snd_wl2 = cm_node->tcp_cntxt.loc_seq_num; 3246 tcp_info->max_snd_window = cm_node->tcp_cntxt.max_snd_wnd; 3247 tcp_info->rcv_wnd = cm_node->tcp_cntxt.rcv_wnd 3248 << cm_node->tcp_cntxt.rcv_wscale; 3249 3250 tcp_info->flow_label = 0; 3251 tcp_info->snd_mss = (u32)cm_node->tcp_cntxt.mss; 3252 tcp_info->tos = cm_node->tos; 3253 if (cm_node->vlan_id < VLAN_N_VID) { 3254 tcp_info->insert_vlan_tag = true; 3255 tcp_info->vlan_tag = cm_node->vlan_id; 3256 tcp_info->vlan_tag |= cm_node->user_pri << VLAN_PRIO_SHIFT; 3257 } 3258 tcp_info->src_port = cm_node->loc_port; 3259 tcp_info->dst_port = cm_node->rem_port; 3260 tcp_info->arp_idx = (u16)irdma_arp_table(iwqp->iwdev->rf, 3261 cm_node->rem_addr, NULL, 3262 IRDMA_ARP_RESOLVE); 3263 if (cm_node->ipv4) { 3264 tcp_info->dest_ip_addr[3] = cm_node->rem_addr[0]; 3265 tcp_info->local_ipaddr[3] = cm_node->loc_addr[0]; 3266 } else { 3267 memcpy(tcp_info->dest_ip_addr, cm_node->rem_addr, 3268 sizeof(tcp_info->dest_ip_addr)); 3269 memcpy(tcp_info->local_ipaddr, cm_node->loc_addr, 3270 sizeof(tcp_info->local_ipaddr)); 3271 } 3272 } 3273 3274 /** 3275 * irdma_cm_init_tsa_conn - setup qp for RTS 3276 * @iwqp: associate qp for the connection 3277 * @cm_node: connection's node 3278 */ 3279 static void 3280 irdma_cm_init_tsa_conn(struct irdma_qp *iwqp, 3281 struct irdma_cm_node *cm_node) 3282 { 3283 struct irdma_iwarp_offload_info *iwarp_info; 3284 struct irdma_qp_host_ctx_info *ctx_info; 3285 3286 iwarp_info = &iwqp->iwarp_info; 3287 ctx_info = &iwqp->ctx_info; 3288 3289 ctx_info->tcp_info = &iwqp->tcp_info; 3290 ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id; 3291 ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id; 3292 3293 iwarp_info->ord_size = cm_node->ord_size; 3294 iwarp_info->ird_size = cm_node->ird_size; 3295 iwarp_info->rd_en = true; 3296 iwarp_info->rdmap_ver = 1; 3297 iwarp_info->ddp_ver = 1; 3298 iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id; 3299 3300 ctx_info->tcp_info_valid = true; 3301 ctx_info->iwarp_info_valid = true; 3302 ctx_info->user_pri = cm_node->user_pri; 3303 3304 irdma_init_tcp_ctx(cm_node, &iwqp->tcp_info, iwqp); 3305 if (cm_node->snd_mark_en) { 3306 iwarp_info->snd_mark_en = true; 3307 iwarp_info->snd_mark_offset = (iwqp->tcp_info.snd_nxt & SNDMARKER_SEQNMASK) + 3308 cm_node->lsmm_size; 3309 } 3310 3311 cm_node->state = IRDMA_CM_STATE_OFFLOADED; 3312 iwqp->tcp_info.tcp_state = IRDMA_TCP_STATE_ESTABLISHED; 3313 iwqp->tcp_info.src_mac_addr_idx = iwqp->iwdev->mac_ip_table_idx; 3314 3315 if (cm_node->rcv_mark_en) { 3316 iwarp_info->rcv_mark_en = true; 3317 iwarp_info->align_hdrs = true; 3318 } 3319 3320 irdma_sc_qp_setctx(&iwqp->sc_qp, iwqp->host_ctx.va, ctx_info); 3321 3322 /* once tcp_info is set, no need to do it again */ 3323 ctx_info->tcp_info_valid = false; 3324 ctx_info->iwarp_info_valid = false; 3325 } 3326 3327 /** 3328 * irdma_cm_disconn - when a connection is being closed 3329 * @iwqp: associated qp for the connection 3330 */ 3331 void 3332 irdma_cm_disconn(struct irdma_qp *iwqp) 3333 { 3334 struct irdma_device *iwdev = iwqp->iwdev; 3335 struct disconn_work *work; 3336 unsigned long flags; 3337 3338 work = kzalloc(sizeof(*work), GFP_ATOMIC); 3339 if (!work) 3340 return; 3341 3342 spin_lock_irqsave(&iwdev->rf->qptable_lock, flags); 3343 if (!iwdev->rf->qp_table[iwqp->ibqp.qp_num]) { 3344 spin_unlock_irqrestore(&iwdev->rf->qptable_lock, flags); 3345 irdma_debug(iwdev_to_idev(iwdev), IRDMA_DEBUG_CM, 3346 "qp_id %d is already freed\n", iwqp->ibqp.qp_num); 3347 kfree(work); 3348 return; 3349 } 3350 irdma_qp_add_ref(&iwqp->ibqp); 3351 spin_unlock_irqrestore(&iwdev->rf->qptable_lock, flags); 3352 3353 work->iwqp = iwqp; 3354 INIT_WORK(&work->work, irdma_disconnect_worker); 3355 queue_work(iwdev->cleanup_wq, &work->work); 3356 } 3357 3358 /** 3359 * irdma_qp_disconnect - free qp and close cm 3360 * @iwqp: associate qp for the connection 3361 */ 3362 static void 3363 irdma_qp_disconnect(struct irdma_qp *iwqp) 3364 { 3365 struct irdma_device *iwdev = iwqp->iwdev; 3366 3367 iwqp->active_conn = 0; 3368 /* close the CM node down if it is still active */ 3369 irdma_debug(iwdev_to_idev(iwdev), IRDMA_DEBUG_CM, 3370 "Call close API\n"); 3371 irdma_cm_close(iwqp->cm_node); 3372 } 3373 3374 /** 3375 * irdma_cm_disconn_true - called by worker thread to disconnect qp 3376 * @iwqp: associate qp for the connection 3377 */ 3378 static void 3379 irdma_cm_disconn_true(struct irdma_qp *iwqp) 3380 { 3381 struct iw_cm_id *cm_id; 3382 struct irdma_device *iwdev; 3383 struct irdma_sc_qp *qp = &iwqp->sc_qp; 3384 u16 last_ae; 3385 u8 original_hw_tcp_state; 3386 u8 original_ibqp_state; 3387 int disconn_status = 0; 3388 int issue_disconn = 0; 3389 int issue_close = 0; 3390 int issue_flush = 0; 3391 unsigned long flags; 3392 int err; 3393 3394 iwdev = iwqp->iwdev; 3395 spin_lock_irqsave(&iwqp->lock, flags); 3396 if (rdma_protocol_roce(&iwdev->ibdev, 1)) { 3397 struct ib_qp_attr attr; 3398 3399 if (iwqp->flush_issued || iwqp->sc_qp.qp_uk.destroy_pending) { 3400 spin_unlock_irqrestore(&iwqp->lock, flags); 3401 return; 3402 } 3403 3404 spin_unlock_irqrestore(&iwqp->lock, flags); 3405 3406 attr.qp_state = IB_QPS_ERR; 3407 irdma_modify_qp_roce(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); 3408 irdma_ib_qp_event(iwqp, qp->event_type); 3409 return; 3410 } 3411 3412 cm_id = iwqp->cm_id; 3413 /* make sure we havent already closed this connection */ 3414 if (!cm_id) { 3415 spin_unlock_irqrestore(&iwqp->lock, flags); 3416 return; 3417 } 3418 3419 original_hw_tcp_state = iwqp->hw_tcp_state; 3420 original_ibqp_state = iwqp->ibqp_state; 3421 last_ae = iwqp->last_aeq; 3422 3423 if (qp->term_flags) { 3424 issue_disconn = 1; 3425 issue_close = 1; 3426 iwqp->cm_id = NULL; 3427 irdma_terminate_del_timer(qp); 3428 if (!iwqp->flush_issued) { 3429 iwqp->flush_issued = 1; 3430 issue_flush = 1; 3431 } 3432 } else if ((original_hw_tcp_state == IRDMA_TCP_STATE_CLOSE_WAIT) || 3433 ((original_ibqp_state == IB_QPS_RTS) && 3434 (last_ae == IRDMA_AE_LLP_CONNECTION_RESET))) { 3435 issue_disconn = 1; 3436 if (last_ae == IRDMA_AE_LLP_CONNECTION_RESET) 3437 disconn_status = -ECONNRESET; 3438 } 3439 3440 if ((original_hw_tcp_state == IRDMA_TCP_STATE_CLOSED || 3441 original_hw_tcp_state == IRDMA_TCP_STATE_TIME_WAIT || 3442 last_ae == IRDMA_AE_RDMAP_ROE_BAD_LLP_CLOSE || 3443 last_ae == IRDMA_AE_BAD_CLOSE || 3444 last_ae == IRDMA_AE_LLP_CONNECTION_RESET || iwdev->rf->reset)) { 3445 issue_close = 1; 3446 iwqp->cm_id = NULL; 3447 qp->term_flags = 0; 3448 if (!iwqp->flush_issued) { 3449 iwqp->flush_issued = 1; 3450 issue_flush = 1; 3451 } 3452 } 3453 3454 spin_unlock_irqrestore(&iwqp->lock, flags); 3455 if (issue_flush && !iwqp->sc_qp.qp_uk.destroy_pending) { 3456 if (!iwqp->user_mode) 3457 queue_delayed_work(iwqp->iwdev->cleanup_wq, 3458 &iwqp->dwork_flush, 3459 msecs_to_jiffies(IRDMA_FLUSH_DELAY_MS)); 3460 irdma_flush_wqes(iwqp, IRDMA_FLUSH_SQ | IRDMA_FLUSH_RQ | 3461 IRDMA_FLUSH_WAIT); 3462 3463 if (qp->term_flags) 3464 irdma_ib_qp_event(iwqp, qp->event_type); 3465 } 3466 3467 if (!cm_id || !cm_id->event_handler) 3468 return; 3469 3470 spin_lock_irqsave(&iwdev->cm_core.ht_lock, flags); 3471 if (!iwqp->cm_node) { 3472 spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags); 3473 return; 3474 } 3475 atomic_inc(&iwqp->cm_node->refcnt); 3476 3477 spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags); 3478 3479 if (issue_disconn) { 3480 err = irdma_send_cm_event(iwqp->cm_node, cm_id, 3481 IW_CM_EVENT_DISCONNECT, 3482 disconn_status); 3483 if (err) 3484 irdma_debug(iwdev_to_idev(iwdev), IRDMA_DEBUG_CM, 3485 "disconnect event failed: - cm_id = %p\n", 3486 cm_id); 3487 } 3488 if (issue_close) { 3489 cm_id->provider_data = iwqp; 3490 err = irdma_send_cm_event(iwqp->cm_node, cm_id, 3491 IW_CM_EVENT_CLOSE, 0); 3492 if (err) 3493 irdma_debug(iwdev_to_idev(iwdev), IRDMA_DEBUG_CM, 3494 "close event failed: - cm_id = %p\n", 3495 cm_id); 3496 irdma_qp_disconnect(iwqp); 3497 } 3498 irdma_rem_ref_cm_node(iwqp->cm_node); 3499 } 3500 3501 /** 3502 * irdma_disconnect_worker - worker for connection close 3503 * @work: points or disconn structure 3504 */ 3505 static void 3506 irdma_disconnect_worker(struct work_struct *work) 3507 { 3508 struct disconn_work *dwork = container_of(work, struct disconn_work, work); 3509 struct irdma_qp *iwqp = dwork->iwqp; 3510 3511 kfree(dwork); 3512 irdma_cm_disconn_true(iwqp); 3513 irdma_qp_rem_ref(&iwqp->ibqp); 3514 } 3515 3516 /** 3517 * irdma_free_lsmm_rsrc - free lsmm memory and deregister 3518 * @iwqp: associate qp for the connection 3519 */ 3520 void 3521 irdma_free_lsmm_rsrc(struct irdma_qp *iwqp) 3522 { 3523 struct irdma_device *iwdev; 3524 3525 iwdev = iwqp->iwdev; 3526 3527 if (iwqp->ietf_mem.va) { 3528 if (iwqp->lsmm_mr) 3529 kc_free_lsmm_dereg_mr(iwdev, iwqp); 3530 irdma_free_dma_mem(iwdev->rf->sc_dev.hw, 3531 &iwqp->ietf_mem); 3532 iwqp->ietf_mem.va = NULL; 3533 } 3534 } 3535 3536 /** 3537 * irdma_accept - registered call for connection to be accepted 3538 * @cm_id: cm information for passive connection 3539 * @conn_param: accpet parameters 3540 */ 3541 int 3542 irdma_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) 3543 { 3544 struct ib_qp *ibqp; 3545 struct irdma_qp *iwqp; 3546 struct irdma_device *iwdev; 3547 struct irdma_sc_dev *dev; 3548 struct irdma_cm_node *cm_node; 3549 struct ib_qp_attr attr = {0}; 3550 int passive_state; 3551 struct ib_mr *ibmr; 3552 struct irdma_pd *iwpd; 3553 u16 buf_len = 0; 3554 struct irdma_kmem_info accept; 3555 u64 tagged_offset; 3556 int wait_ret; 3557 int ret = 0; 3558 3559 ibqp = irdma_get_qp(cm_id->device, conn_param->qpn); 3560 if (!ibqp) 3561 return -EINVAL; 3562 3563 iwqp = to_iwqp(ibqp); 3564 iwdev = iwqp->iwdev; 3565 dev = &iwdev->rf->sc_dev; 3566 cm_node = cm_id->provider_data; 3567 3568 if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) { 3569 cm_node->ipv4 = true; 3570 cm_node->vlan_id = irdma_get_vlan_ipv4(cm_node->loc_addr); 3571 } else { 3572 cm_node->ipv4 = false; 3573 irdma_netdev_vlan_ipv6(cm_node->loc_addr, &cm_node->vlan_id, 3574 NULL); 3575 } 3576 irdma_debug(iwdev_to_idev(iwdev), IRDMA_DEBUG_CM, 3577 "Accept vlan_id=%d\n", cm_node->vlan_id); 3578 3579 if (cm_node->state == IRDMA_CM_STATE_LISTENER_DESTROYED) { 3580 ret = -EINVAL; 3581 goto error; 3582 } 3583 3584 passive_state = atomic_add_return(1, &cm_node->passive_state); 3585 if (passive_state == IRDMA_SEND_RESET_EVENT) { 3586 ret = -ECONNRESET; 3587 goto error; 3588 } 3589 3590 buf_len = conn_param->private_data_len + IRDMA_MAX_IETF_SIZE; 3591 iwqp->ietf_mem.size = buf_len; 3592 iwqp->ietf_mem.va = irdma_allocate_dma_mem(dev->hw, &iwqp->ietf_mem, 3593 iwqp->ietf_mem.size, 1); 3594 if (!iwqp->ietf_mem.va) { 3595 ret = -ENOMEM; 3596 goto error; 3597 } 3598 3599 cm_node->pdata.size = conn_param->private_data_len; 3600 accept.addr = iwqp->ietf_mem.va; 3601 accept.size = irdma_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY); 3602 memcpy((u8 *)accept.addr + accept.size, conn_param->private_data, 3603 conn_param->private_data_len); 3604 3605 if (cm_node->dev->ws_add(iwqp->sc_qp.vsi, cm_node->user_pri)) { 3606 ret = -ENOMEM; 3607 goto error; 3608 } 3609 iwqp->sc_qp.user_pri = cm_node->user_pri; 3610 irdma_qp_add_qos(&iwqp->sc_qp); 3611 if (cm_node->dev->hw_attrs.uk_attrs.hw_rev == IRDMA_GEN_2) 3612 iwdev->rf->check_fc(&iwdev->vsi, &iwqp->sc_qp); 3613 /* setup our first outgoing iWarp send WQE (the IETF frame response) */ 3614 iwpd = iwqp->iwpd; 3615 tagged_offset = (uintptr_t)iwqp->ietf_mem.va; 3616 ibmr = irdma_reg_phys_mr(&iwpd->ibpd, iwqp->ietf_mem.pa, buf_len, 3617 IB_ACCESS_LOCAL_WRITE, &tagged_offset); 3618 if (IS_ERR(ibmr)) { 3619 ret = -ENOMEM; 3620 goto error; 3621 } 3622 3623 ibmr->pd = &iwpd->ibpd; 3624 ibmr->device = iwpd->ibpd.device; 3625 iwqp->lsmm_mr = ibmr; 3626 if (iwqp->page) 3627 iwqp->sc_qp.qp_uk.sq_base = kmap_local_page(iwqp->page); 3628 3629 cm_node->lsmm_size = accept.size + conn_param->private_data_len; 3630 irdma_sc_send_lsmm(&iwqp->sc_qp, iwqp->ietf_mem.va, cm_node->lsmm_size, 3631 ibmr->lkey); 3632 3633 if (iwqp->page) 3634 kunmap_local(iwqp->sc_qp.qp_uk.sq_base); 3635 3636 iwqp->cm_id = cm_id; 3637 cm_node->cm_id = cm_id; 3638 3639 cm_id->provider_data = iwqp; 3640 iwqp->active_conn = 0; 3641 iwqp->cm_node = cm_node; 3642 cm_node->iwqp = iwqp; 3643 irdma_cm_init_tsa_conn(iwqp, cm_node); 3644 irdma_qp_add_ref(&iwqp->ibqp); 3645 cm_id->add_ref(cm_id); 3646 3647 attr.qp_state = IB_QPS_RTS; 3648 cm_node->qhash_set = false; 3649 cm_node->cm_core->cm_free_ah(cm_node); 3650 3651 irdma_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); 3652 if (dev->hw_attrs.uk_attrs.feature_flags & IRDMA_FEATURE_RTS_AE) { 3653 wait_ret = wait_event_interruptible_timeout(iwqp->waitq, 3654 iwqp->rts_ae_rcvd, 3655 IRDMA_MAX_TIMEOUT); 3656 if (!wait_ret) { 3657 irdma_debug(iwdev_to_idev(iwdev), IRDMA_DEBUG_CM, 3658 "Slow Connection: cm_node=%p, loc_port=%d, rem_port=%d, cm_id=%p\n", 3659 cm_node, cm_node->loc_port, 3660 cm_node->rem_port, cm_node->cm_id); 3661 ret = -ECONNRESET; 3662 goto error; 3663 } 3664 } 3665 3666 irdma_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0); 3667 cm_node->accelerated = true; 3668 complete(&cm_node->establish_comp); 3669 3670 if (cm_node->accept_pend) { 3671 atomic_dec(&cm_node->listener->pend_accepts_cnt); 3672 cm_node->accept_pend = 0; 3673 } 3674 3675 irdma_debug(iwdev_to_idev(iwdev), IRDMA_DEBUG_CM, 3676 "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", 3677 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr, 3678 cm_node->loc_addr, cm_node, cm_id, ibqp->qp_num); 3679 cm_node->cm_core->stats_accepts++; 3680 3681 return 0; 3682 error: 3683 irdma_free_lsmm_rsrc(iwqp); 3684 irdma_rem_ref_cm_node(cm_node); 3685 3686 return ret; 3687 } 3688 3689 /** 3690 * irdma_reject - registered call for connection to be rejected 3691 * @cm_id: cm information for passive connection 3692 * @pdata: private data to be sent 3693 * @pdata_len: private data length 3694 */ 3695 int 3696 irdma_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len) 3697 { 3698 struct irdma_device *iwdev; 3699 struct irdma_cm_node *cm_node; 3700 3701 cm_node = cm_id->provider_data; 3702 cm_node->pdata.size = pdata_len; 3703 3704 iwdev = to_iwdev(cm_id->device); 3705 if (!iwdev) 3706 return -EINVAL; 3707 3708 cm_node->cm_core->stats_rejects++; 3709 3710 if (pdata_len + sizeof(struct ietf_mpa_v2) > IRDMA_MAX_CM_BUF) 3711 return -EINVAL; 3712 3713 return irdma_cm_reject(cm_node, pdata, pdata_len); 3714 } 3715 3716 /** 3717 * irdma_connect - registered call for connection to be established 3718 * @cm_id: cm information for passive connection 3719 * @conn_param: Information about the connection 3720 */ 3721 int 3722 irdma_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) 3723 { 3724 struct ib_qp *ibqp; 3725 struct irdma_qp *iwqp; 3726 struct irdma_device *iwdev; 3727 struct irdma_cm_node *cm_node; 3728 struct irdma_cm_info cm_info; 3729 struct sockaddr_in *laddr; 3730 struct sockaddr_in *raddr; 3731 struct sockaddr_in6 *laddr6; 3732 struct sockaddr_in6 *raddr6; 3733 int ret = 0; 3734 3735 ibqp = irdma_get_qp(cm_id->device, conn_param->qpn); 3736 if (!ibqp) 3737 return -EINVAL; 3738 iwqp = to_iwqp(ibqp); 3739 if (!iwqp) 3740 return -EINVAL; 3741 iwdev = iwqp->iwdev; 3742 if (!iwdev) 3743 return -EINVAL; 3744 3745 laddr = (struct sockaddr_in *)&cm_id->m_local_addr; 3746 raddr = (struct sockaddr_in *)&cm_id->m_remote_addr; 3747 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr; 3748 raddr6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr; 3749 3750 if (!(laddr->sin_port) || !(raddr->sin_port)) 3751 return -EINVAL; 3752 3753 iwqp->active_conn = 1; 3754 iwqp->cm_id = NULL; 3755 cm_id->provider_data = iwqp; 3756 3757 /* set up the connection params for the node */ 3758 if (cm_id->remote_addr.ss_family == AF_INET) { 3759 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV4) 3760 return -EINVAL; 3761 3762 cm_info.ipv4 = true; 3763 memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr)); 3764 memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr)); 3765 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr); 3766 cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr); 3767 cm_info.loc_port = ntohs(laddr->sin_port); 3768 cm_info.rem_port = ntohs(raddr->sin_port); 3769 cm_info.vlan_id = irdma_get_vlan_ipv4(cm_info.loc_addr); 3770 } else { 3771 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV6) 3772 return -EINVAL; 3773 3774 cm_info.ipv4 = false; 3775 irdma_copy_ip_ntohl(cm_info.loc_addr, 3776 laddr6->sin6_addr.__u6_addr.__u6_addr32); 3777 irdma_copy_ip_ntohl(cm_info.rem_addr, 3778 raddr6->sin6_addr.__u6_addr.__u6_addr32); 3779 cm_info.loc_port = ntohs(laddr6->sin6_port); 3780 cm_info.rem_port = ntohs(raddr6->sin6_port); 3781 irdma_netdev_vlan_ipv6(cm_info.loc_addr, &cm_info.vlan_id, 3782 NULL); 3783 } 3784 cm_info.cm_id = cm_id; 3785 cm_info.qh_qpid = iwdev->vsi.ilq->qp_id; 3786 cm_info.tos = cm_id->tos; 3787 if (iwdev->vsi.dscp_mode) 3788 cm_info.user_pri = 3789 iwqp->sc_qp.vsi->dscp_map[irdma_tos2dscp(cm_info.tos)]; 3790 else 3791 cm_info.user_pri = rt_tos2priority(cm_id->tos); 3792 3793 if (iwqp->sc_qp.dev->ws_add(iwqp->sc_qp.vsi, cm_info.user_pri)) 3794 return -ENOMEM; 3795 iwqp->sc_qp.user_pri = cm_info.user_pri; 3796 irdma_qp_add_qos(&iwqp->sc_qp); 3797 if (iwdev->rf->sc_dev.hw_attrs.uk_attrs.hw_rev == IRDMA_GEN_2) 3798 iwdev->rf->check_fc(&iwdev->vsi, &iwqp->sc_qp); 3799 irdma_debug(iwdev_to_idev(iwdev), IRDMA_DEBUG_DCB, 3800 "TOS:[%d] UP:[%d]\n", cm_id->tos, cm_info.user_pri); 3801 3802 ret = irdma_create_cm_node(&iwdev->cm_core, iwdev, conn_param, &cm_info, 3803 &cm_node); 3804 if (ret) 3805 return ret; 3806 ret = cm_node->cm_core->cm_create_ah(cm_node, true); 3807 if (ret) 3808 goto err; 3809 if (irdma_manage_qhash(iwdev, &cm_info, 3810 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 3811 IRDMA_QHASH_MANAGE_TYPE_ADD, NULL, true)) { 3812 ret = -EINVAL; 3813 goto err; 3814 } 3815 cm_node->qhash_set = true; 3816 3817 cm_node->apbvt_entry = irdma_add_apbvt(iwdev, cm_info.loc_port); 3818 if (!cm_node->apbvt_entry) { 3819 ret = -EINVAL; 3820 goto err; 3821 } 3822 3823 cm_node->apbvt_set = true; 3824 iwqp->cm_node = cm_node; 3825 cm_node->iwqp = iwqp; 3826 iwqp->cm_id = cm_id; 3827 irdma_qp_add_ref(&iwqp->ibqp); 3828 cm_id->add_ref(cm_id); 3829 3830 if (cm_node->state != IRDMA_CM_STATE_OFFLOADED) { 3831 cm_node->state = IRDMA_CM_STATE_SYN_SENT; 3832 ret = irdma_send_syn(cm_node, 0); 3833 if (ret) 3834 goto err; 3835 } 3836 3837 irdma_debug(iwdev_to_idev(iwdev), IRDMA_DEBUG_CM, 3838 "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", 3839 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr, 3840 cm_node->loc_addr, cm_node, cm_id, ibqp->qp_num); 3841 3842 return 0; 3843 3844 err: 3845 if (cm_info.ipv4) 3846 irdma_debug(iwdev_to_idev(iwdev), IRDMA_DEBUG_CM, 3847 "connect() FAILED: dest addr=%pI4", 3848 cm_info.rem_addr); 3849 else 3850 irdma_debug(iwdev_to_idev(iwdev), IRDMA_DEBUG_CM, 3851 "connect() FAILED: dest addr=%pI6", 3852 cm_info.rem_addr); 3853 irdma_rem_ref_cm_node(cm_node); 3854 iwdev->cm_core.stats_connect_errs++; 3855 3856 return ret; 3857 } 3858 3859 /** 3860 * irdma_create_listen - registered call creating listener 3861 * @cm_id: cm information for passive connection 3862 * @backlog: to max accept pending count 3863 */ 3864 int 3865 irdma_create_listen(struct iw_cm_id *cm_id, int backlog) 3866 { 3867 struct irdma_device *iwdev; 3868 struct irdma_cm_listener *cm_listen_node; 3869 struct irdma_cm_info cm_info = {0}; 3870 struct sockaddr_in *laddr; 3871 struct sockaddr_in6 *laddr6; 3872 bool wildcard = false; 3873 int err; 3874 3875 iwdev = to_iwdev(cm_id->device); 3876 if (!iwdev) 3877 return -EINVAL; 3878 3879 laddr = (struct sockaddr_in *)&cm_id->m_local_addr; 3880 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr; 3881 cm_info.qh_qpid = iwdev->vsi.ilq->qp_id; 3882 3883 if (laddr->sin_family == AF_INET) { 3884 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV4) 3885 return -EINVAL; 3886 3887 cm_info.ipv4 = true; 3888 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr); 3889 cm_info.loc_port = ntohs(laddr->sin_port); 3890 3891 if (laddr->sin_addr.s_addr != htonl(INADDR_ANY)) { 3892 cm_info.vlan_id = irdma_get_vlan_ipv4(cm_info.loc_addr); 3893 } else { 3894 cm_info.vlan_id = 0xFFFF; 3895 wildcard = true; 3896 } 3897 } else { 3898 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV6) 3899 return -EINVAL; 3900 3901 cm_info.ipv4 = false; 3902 irdma_copy_ip_ntohl(cm_info.loc_addr, 3903 laddr6->sin6_addr.__u6_addr.__u6_addr32); 3904 cm_info.loc_port = ntohs(laddr6->sin6_port); 3905 if (!IN6_IS_ADDR_UNSPECIFIED(&laddr6->sin6_addr)) { 3906 irdma_netdev_vlan_ipv6(cm_info.loc_addr, 3907 &cm_info.vlan_id, NULL); 3908 } else { 3909 cm_info.vlan_id = 0xFFFF; 3910 wildcard = true; 3911 } 3912 } 3913 3914 if (cm_info.vlan_id >= VLAN_N_VID && iwdev->dcb_vlan_mode) 3915 cm_info.vlan_id = 0; 3916 cm_info.backlog = backlog; 3917 cm_info.cm_id = cm_id; 3918 3919 cm_listen_node = irdma_make_listen_node(&iwdev->cm_core, iwdev, 3920 &cm_info); 3921 if (!cm_listen_node) { 3922 irdma_debug(iwdev_to_idev(iwdev), IRDMA_DEBUG_CM, 3923 "cm_listen_node == NULL\n"); 3924 return -ENOMEM; 3925 } 3926 3927 cm_id->provider_data = cm_listen_node; 3928 3929 cm_listen_node->tos = cm_id->tos; 3930 if (iwdev->vsi.dscp_mode) 3931 cm_listen_node->user_pri = 3932 iwdev->vsi.dscp_map[irdma_tos2dscp(cm_id->tos)]; 3933 else 3934 cm_listen_node->user_pri = rt_tos2priority(cm_id->tos); 3935 cm_info.user_pri = cm_listen_node->user_pri; 3936 if (!cm_listen_node->reused_node) { 3937 if (wildcard) { 3938 err = irdma_add_mqh(iwdev, &cm_info, cm_listen_node); 3939 if (err) 3940 goto error; 3941 } else { 3942 err = irdma_manage_qhash(iwdev, &cm_info, 3943 IRDMA_QHASH_TYPE_TCP_SYN, 3944 IRDMA_QHASH_MANAGE_TYPE_ADD, 3945 NULL, true); 3946 if (err) 3947 goto error; 3948 3949 cm_listen_node->qhash_set = true; 3950 } 3951 3952 cm_listen_node->apbvt_entry = irdma_add_apbvt(iwdev, 3953 cm_info.loc_port); 3954 if (!cm_listen_node->apbvt_entry) 3955 goto error; 3956 } 3957 cm_id->add_ref(cm_id); 3958 cm_listen_node->cm_core->stats_listen_created++; 3959 irdma_debug(iwdev_to_idev(iwdev), IRDMA_DEBUG_CM, 3960 "loc_port=0x%04x loc_addr=%pI4 cm_listen_node=%p cm_id=%p qhash_set=%d vlan_id=%d\n", 3961 cm_listen_node->loc_port, cm_listen_node->loc_addr, cm_listen_node, cm_listen_node->cm_id, 3962 cm_listen_node->qhash_set, cm_listen_node->vlan_id); 3963 3964 return 0; 3965 3966 error: 3967 3968 irdma_cm_del_listen(&iwdev->cm_core, cm_listen_node, false); 3969 3970 return -EINVAL; 3971 } 3972 3973 /** 3974 * irdma_destroy_listen - registered call to destroy listener 3975 * @cm_id: cm information for passive connection 3976 */ 3977 int 3978 irdma_destroy_listen(struct iw_cm_id *cm_id) 3979 { 3980 struct irdma_device *iwdev; 3981 3982 iwdev = to_iwdev(cm_id->device); 3983 if (cm_id->provider_data) 3984 irdma_cm_del_listen(&iwdev->cm_core, cm_id->provider_data, 3985 true); 3986 else 3987 irdma_debug(iwdev_to_idev(iwdev), IRDMA_DEBUG_CM, 3988 "cm_id->provider_data was NULL\n"); 3989 3990 cm_id->rem_ref(cm_id); 3991 3992 return 0; 3993 } 3994 3995 /** 3996 * irdma_teardown_list_prep - add conn nodes slated for tear down to list 3997 * @cm_core: cm's core 3998 * @teardown_list: a list to which cm_node will be selected 3999 * @ipaddr: pointer to ip address 4000 * @nfo: pointer to cm_info structure instance 4001 * @disconnect_all: flag indicating disconnect all QPs 4002 */ 4003 static void 4004 irdma_teardown_list_prep(struct irdma_cm_core *cm_core, 4005 struct list_head *teardown_list, 4006 u32 *ipaddr, 4007 struct irdma_cm_info *nfo, 4008 bool disconnect_all) 4009 { 4010 struct irdma_cm_node *cm_node; 4011 int bkt; 4012 4013 HASH_FOR_EACH_RCU(cm_core->cm_hash_tbl, bkt, cm_node, list) { 4014 if ((disconnect_all || 4015 (nfo->vlan_id == cm_node->vlan_id && 4016 !memcmp(cm_node->loc_addr, ipaddr, nfo->ipv4 ? 4 : 16))) && 4017 atomic_inc_not_zero(&cm_node->refcnt)) 4018 list_add(&cm_node->teardown_entry, teardown_list); 4019 } 4020 } 4021 4022 /** 4023 * irdma_cm_event_connected - handle connected active node 4024 * @event: the info for cm_node of connection 4025 */ 4026 static void 4027 irdma_cm_event_connected(struct irdma_cm_event *event) 4028 { 4029 struct irdma_qp *iwqp; 4030 struct irdma_device *iwdev; 4031 struct irdma_cm_node *cm_node; 4032 struct irdma_sc_dev *dev; 4033 struct ib_qp_attr attr = {0}; 4034 struct iw_cm_id *cm_id; 4035 int status; 4036 bool read0; 4037 int wait_ret = 0; 4038 4039 cm_node = event->cm_node; 4040 cm_id = cm_node->cm_id; 4041 iwqp = cm_id->provider_data; 4042 iwdev = iwqp->iwdev; 4043 dev = &iwdev->rf->sc_dev; 4044 if (iwqp->sc_qp.qp_uk.destroy_pending) { 4045 status = -ETIMEDOUT; 4046 goto error; 4047 } 4048 4049 irdma_cm_init_tsa_conn(iwqp, cm_node); 4050 read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO); 4051 if (iwqp->page) 4052 iwqp->sc_qp.qp_uk.sq_base = kmap_local_page(iwqp->page); 4053 irdma_sc_send_rtt(&iwqp->sc_qp, read0); 4054 if (iwqp->page) 4055 kunmap_local(iwqp->sc_qp.qp_uk.sq_base); 4056 4057 attr.qp_state = IB_QPS_RTS; 4058 cm_node->qhash_set = false; 4059 irdma_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); 4060 if (dev->hw_attrs.uk_attrs.feature_flags & IRDMA_FEATURE_RTS_AE) { 4061 wait_ret = wait_event_interruptible_timeout(iwqp->waitq, 4062 iwqp->rts_ae_rcvd, 4063 IRDMA_MAX_TIMEOUT); 4064 if (!wait_ret) 4065 irdma_debug(iwdev_to_idev(iwdev), IRDMA_DEBUG_CM, 4066 "Slow Connection: cm_node=%p, loc_port=%d, rem_port=%d, cm_id=%p\n", 4067 cm_node, cm_node->loc_port, 4068 cm_node->rem_port, cm_node->cm_id); 4069 } 4070 4071 irdma_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 0); 4072 cm_node->accelerated = true; 4073 complete(&cm_node->establish_comp); 4074 cm_node->cm_core->cm_free_ah(cm_node); 4075 return; 4076 4077 error: 4078 iwqp->cm_id = NULL; 4079 cm_id->provider_data = NULL; 4080 irdma_send_cm_event(event->cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 4081 status); 4082 irdma_rem_ref_cm_node(event->cm_node); 4083 } 4084 4085 /** 4086 * irdma_cm_event_reset - handle reset 4087 * @event: the info for cm_node of connection 4088 */ 4089 static void 4090 irdma_cm_event_reset(struct irdma_cm_event *event) 4091 { 4092 struct irdma_cm_node *cm_node = event->cm_node; 4093 struct iw_cm_id *cm_id = cm_node->cm_id; 4094 struct irdma_qp *iwqp; 4095 4096 if (!cm_id) 4097 return; 4098 4099 iwqp = cm_id->provider_data; 4100 if (!iwqp) 4101 return; 4102 4103 irdma_debug(iwdev_to_idev(cm_node->iwdev), IRDMA_DEBUG_CM, 4104 "reset event %p - cm_id = %p\n", event->cm_node, cm_id); 4105 iwqp->cm_id = NULL; 4106 4107 irdma_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT, 4108 -ECONNRESET); 4109 irdma_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0); 4110 } 4111 4112 /** 4113 * irdma_cm_event_handler - send event to cm upper layer 4114 * @work: pointer of cm event info. 4115 */ 4116 static void 4117 irdma_cm_event_handler(struct work_struct *work) 4118 { 4119 struct irdma_cm_event *event = container_of(work, struct irdma_cm_event, event_work); 4120 struct irdma_cm_node *cm_node; 4121 4122 if (!event || !event->cm_node || !event->cm_node->cm_core) 4123 return; 4124 4125 cm_node = event->cm_node; 4126 4127 switch (event->type) { 4128 case IRDMA_CM_EVENT_MPA_REQ: 4129 irdma_send_cm_event(cm_node, cm_node->cm_id, 4130 IW_CM_EVENT_CONNECT_REQUEST, 0); 4131 break; 4132 case IRDMA_CM_EVENT_RESET: 4133 irdma_cm_event_reset(event); 4134 break; 4135 case IRDMA_CM_EVENT_CONNECTED: 4136 if (!event->cm_node->cm_id || 4137 event->cm_node->state != IRDMA_CM_STATE_OFFLOADED) 4138 break; 4139 irdma_cm_event_connected(event); 4140 break; 4141 case IRDMA_CM_EVENT_MPA_REJECT: 4142 if (!event->cm_node->cm_id || 4143 cm_node->state == IRDMA_CM_STATE_OFFLOADED) 4144 break; 4145 irdma_send_cm_event(cm_node, cm_node->cm_id, 4146 IW_CM_EVENT_CONNECT_REPLY, -ECONNREFUSED); 4147 break; 4148 case IRDMA_CM_EVENT_ABORTED: 4149 if (!event->cm_node->cm_id || 4150 event->cm_node->state == IRDMA_CM_STATE_OFFLOADED) 4151 break; 4152 irdma_event_connect_error(event); 4153 break; 4154 default: 4155 irdma_debug(iwdev_to_idev(cm_node->iwdev), IRDMA_DEBUG_CM, 4156 "bad event type = %d\n", event->type); 4157 break; 4158 } 4159 4160 irdma_rem_ref_cm_node(event->cm_node); 4161 kfree(event); 4162 } 4163 4164 /** 4165 * irdma_cm_post_event - queue event request for worker thread 4166 * @event: cm node's info for up event call 4167 */ 4168 static void 4169 irdma_cm_post_event(struct irdma_cm_event *event) 4170 { 4171 atomic_inc(&event->cm_node->refcnt); 4172 INIT_WORK(&event->event_work, irdma_cm_event_handler); 4173 queue_work(event->cm_node->cm_core->event_wq, &event->event_work); 4174 } 4175 4176 /** 4177 * irdma_cm_teardown_connections - teardown QPs 4178 * @iwdev: device pointer 4179 * @ipaddr: Pointer to IPv4 or IPv6 address 4180 * @nfo: Connection info 4181 * @disconnect_all: flag indicating disconnect all QPs 4182 * 4183 * teardown QPs where source or destination addr matches ip addr 4184 */ 4185 void 4186 irdma_cm_teardown_connections(struct irdma_device *iwdev, u32 *ipaddr, 4187 struct irdma_cm_info *nfo, 4188 bool disconnect_all) 4189 { 4190 struct irdma_cm_core *cm_core = &iwdev->cm_core; 4191 struct list_head *list_core_temp; 4192 struct list_head *list_node; 4193 struct irdma_cm_node *cm_node; 4194 struct list_head teardown_list; 4195 struct ib_qp_attr attr; 4196 struct irdma_sc_vsi *vsi = &iwdev->vsi; 4197 struct irdma_sc_qp *sc_qp; 4198 struct irdma_qp *qp; 4199 int i; 4200 4201 INIT_LIST_HEAD(&teardown_list); 4202 4203 rcu_read_lock(); 4204 irdma_teardown_list_prep(cm_core, &teardown_list, ipaddr, nfo, disconnect_all); 4205 rcu_read_unlock(); 4206 4207 list_for_each_safe(list_node, list_core_temp, &teardown_list) { 4208 cm_node = container_of(list_node, struct irdma_cm_node, 4209 teardown_entry); 4210 attr.qp_state = IB_QPS_ERR; 4211 irdma_modify_qp(&cm_node->iwqp->ibqp, &attr, IB_QP_STATE, NULL); 4212 if (iwdev->rf->reset) 4213 irdma_cm_disconn(cm_node->iwqp); 4214 irdma_rem_ref_cm_node(cm_node); 4215 } 4216 if (!iwdev->roce_mode) 4217 return; 4218 4219 INIT_LIST_HEAD(&teardown_list); 4220 for (i = 0; i < IRDMA_MAX_USER_PRIORITY; i++) { 4221 mutex_lock(&vsi->qos[i].qos_mutex); 4222 list_for_each_safe(list_node, list_core_temp, 4223 &vsi->qos[i].qplist) { 4224 u32 qp_ip[4]; 4225 4226 sc_qp = container_of(list_node, struct irdma_sc_qp, 4227 list); 4228 if (sc_qp->qp_uk.qp_type != IRDMA_QP_TYPE_ROCE_RC) 4229 continue; 4230 4231 qp = sc_qp->qp_uk.back_qp; 4232 if (!disconnect_all) { 4233 if (nfo->ipv4) 4234 qp_ip[0] = qp->udp_info.local_ipaddr[3]; 4235 else 4236 memcpy(qp_ip, 4237 &qp->udp_info.local_ipaddr[0], 4238 sizeof(qp_ip)); 4239 } 4240 4241 if (disconnect_all || 4242 (nfo->vlan_id == (qp->udp_info.vlan_tag & EVL_VLID_MASK) && 4243 !memcmp(qp_ip, ipaddr, nfo->ipv4 ? 4 : 16))) { 4244 spin_lock(&iwdev->rf->qptable_lock); 4245 if (iwdev->rf->qp_table[sc_qp->qp_uk.qp_id]) { 4246 irdma_qp_add_ref(&qp->ibqp); 4247 list_add(&qp->teardown_entry, 4248 &teardown_list); 4249 } 4250 spin_unlock(&iwdev->rf->qptable_lock); 4251 } 4252 } 4253 mutex_unlock(&vsi->qos[i].qos_mutex); 4254 } 4255 4256 list_for_each_safe(list_node, list_core_temp, &teardown_list) { 4257 qp = container_of(list_node, struct irdma_qp, teardown_entry); 4258 attr.qp_state = IB_QPS_ERR; 4259 irdma_modify_qp_roce(&qp->ibqp, &attr, IB_QP_STATE, NULL); 4260 irdma_qp_rem_ref(&qp->ibqp); 4261 } 4262 } 4263