1 /*- 2 * SPDX-License-Identifier: GPL-2.0 or Linux-OpenIB 3 * 4 * Copyright (c) 2015 - 2023 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 35 #include "irdma_main.h" 36 37 static void irdma_cm_post_event(struct irdma_cm_event *event); 38 static void irdma_disconnect_worker(struct work_struct *work); 39 40 /** 41 * irdma_free_sqbuf - put back puda buffer if refcount is 0 42 * @vsi: The VSI structure of the device 43 * @bufp: puda buffer to free 44 */ 45 void 46 irdma_free_sqbuf(struct irdma_sc_vsi *vsi, void *bufp) 47 { 48 struct irdma_puda_buf *buf = bufp; 49 struct irdma_puda_rsrc *ilq = vsi->ilq; 50 51 if (atomic_dec_and_test(&buf->refcount)) 52 irdma_puda_ret_bufpool(ilq, buf); 53 } 54 55 /** 56 * irdma_record_ird_ord - Record IRD/ORD passed in 57 * @cm_node: connection's node 58 * @conn_ird: connection IRD 59 * @conn_ord: connection ORD 60 */ 61 static void 62 irdma_record_ird_ord(struct irdma_cm_node *cm_node, u32 conn_ird, 63 u32 conn_ord) 64 { 65 if (conn_ird > cm_node->dev->hw_attrs.max_hw_ird) 66 conn_ird = cm_node->dev->hw_attrs.max_hw_ird; 67 68 if (conn_ord > cm_node->dev->hw_attrs.max_hw_ord) 69 conn_ord = cm_node->dev->hw_attrs.max_hw_ord; 70 else if (!conn_ord && cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO) 71 conn_ord = 1; 72 cm_node->ird_size = conn_ird; 73 cm_node->ord_size = conn_ord; 74 } 75 76 /** 77 * irdma_copy_ip_ntohl - copy IP address from network to host 78 * @dst: IP address in host order 79 * @src: IP address in network order (big endian) 80 */ 81 void 82 irdma_copy_ip_ntohl(u32 *dst, __be32 *src) 83 { 84 *dst++ = ntohl(*src++); 85 *dst++ = ntohl(*src++); 86 *dst++ = ntohl(*src++); 87 *dst = ntohl(*src); 88 } 89 90 /** 91 * irdma_copy_ip_htonl - copy IP address from host to network order 92 * @dst: IP address in network order (big endian) 93 * @src: IP address in host order 94 */ 95 void 96 irdma_copy_ip_htonl(__be32 *dst, u32 *src) 97 { 98 *dst++ = htonl(*src++); 99 *dst++ = htonl(*src++); 100 *dst++ = htonl(*src++); 101 *dst = htonl(*src); 102 } 103 104 /** 105 * irdma_get_addr_info 106 * @cm_node: contains ip/tcp info 107 * @cm_info: to get a copy of the cm_node ip/tcp info 108 */ 109 static void 110 irdma_get_addr_info(struct irdma_cm_node *cm_node, 111 struct irdma_cm_info *cm_info) 112 { 113 memset(cm_info, 0, sizeof(*cm_info)); 114 cm_info->ipv4 = cm_node->ipv4; 115 cm_info->vlan_id = cm_node->vlan_id; 116 memcpy(cm_info->loc_addr, cm_node->loc_addr, sizeof(cm_info->loc_addr)); 117 memcpy(cm_info->rem_addr, cm_node->rem_addr, sizeof(cm_info->rem_addr)); 118 cm_info->loc_port = cm_node->loc_port; 119 cm_info->rem_port = cm_node->rem_port; 120 } 121 122 /** 123 * irdma_fill_sockaddr4 - fill in addr info for IPv4 connection 124 * @cm_node: connection's node 125 * @event: upper layer's cm event 126 */ 127 static inline void 128 irdma_fill_sockaddr4(struct irdma_cm_node *cm_node, 129 struct iw_cm_event *event) 130 { 131 struct sockaddr_in *laddr = (struct sockaddr_in *)&event->local_addr; 132 struct sockaddr_in *raddr = (struct sockaddr_in *)&event->remote_addr; 133 134 laddr->sin_family = AF_INET; 135 raddr->sin_family = AF_INET; 136 137 laddr->sin_port = htons(cm_node->loc_port); 138 raddr->sin_port = htons(cm_node->rem_port); 139 140 laddr->sin_addr.s_addr = htonl(cm_node->loc_addr[0]); 141 raddr->sin_addr.s_addr = htonl(cm_node->rem_addr[0]); 142 } 143 144 /** 145 * irdma_fill_sockaddr6 - fill in addr info for IPv6 connection 146 * @cm_node: connection's node 147 * @event: upper layer's cm event 148 */ 149 static inline void 150 irdma_fill_sockaddr6(struct irdma_cm_node *cm_node, 151 struct iw_cm_event *event) 152 { 153 struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)&event->local_addr; 154 struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)&event->remote_addr; 155 156 laddr6->sin6_family = AF_INET6; 157 raddr6->sin6_family = AF_INET6; 158 159 laddr6->sin6_port = htons(cm_node->loc_port); 160 raddr6->sin6_port = htons(cm_node->rem_port); 161 162 irdma_copy_ip_htonl(laddr6->sin6_addr.__u6_addr.__u6_addr32, 163 cm_node->loc_addr); 164 irdma_copy_ip_htonl(raddr6->sin6_addr.__u6_addr.__u6_addr32, 165 cm_node->rem_addr); 166 } 167 168 /** 169 * irdma_get_cmevent_info - for cm event upcall 170 * @cm_node: connection's node 171 * @cm_id: upper layers cm struct for the event 172 * @event: upper layer's cm event 173 */ 174 static inline void 175 irdma_get_cmevent_info(struct irdma_cm_node *cm_node, 176 struct iw_cm_id *cm_id, 177 struct iw_cm_event *event) 178 { 179 memcpy(&event->local_addr, &cm_id->m_local_addr, 180 sizeof(event->local_addr)); 181 memcpy(&event->remote_addr, &cm_id->m_remote_addr, 182 sizeof(event->remote_addr)); 183 if (cm_node) { 184 event->private_data = cm_node->pdata_buf; 185 event->private_data_len = (u8)cm_node->pdata.size; 186 event->ird = cm_node->ird_size; 187 event->ord = cm_node->ord_size; 188 } 189 } 190 191 /** 192 * irdma_send_cm_event - upcall cm's event handler 193 * @cm_node: connection's node 194 * @cm_id: upper layer's cm info struct 195 * @type: Event type to indicate 196 * @status: status for the event type 197 */ 198 static int 199 irdma_send_cm_event(struct irdma_cm_node *cm_node, 200 struct iw_cm_id *cm_id, 201 enum iw_cm_event_type type, int status) 202 { 203 struct iw_cm_event event = {0}; 204 205 event.event = type; 206 event.status = status; 207 208 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 209 "cm_node %p cm_id=%p state=%d accel=%d event_type=%d status=%d\n", 210 cm_node, cm_id, cm_node->accelerated, cm_node->state, type, 211 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(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 292 "node=%p event=%p type=%u dst=%x src=%x\n", cm_node, event, 293 type, event->cm_info.loc_addr[0], 294 event->cm_info.rem_addr[0]); 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(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, "AH invalid\n"); 360 return NULL; 361 } 362 363 sqbuf = irdma_puda_get_bufpool(vsi->ilq); 364 if (!sqbuf) { 365 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, "SQ buf NULL\n"); 366 return NULL; 367 } 368 369 sqbuf->ah_id = cm_node->ah->ah_info.ah_idx; 370 buf = sqbuf->mem.va; 371 if (options) 372 opts_len = (u32)options->size; 373 374 if (hdr) 375 hdr_len = hdr->size; 376 377 if (pdata) 378 pd_len = pdata->size; 379 380 pktsize = sizeof(*tcph) + opts_len + hdr_len + pd_len; 381 382 memset(buf, 0, pktsize); 383 384 sqbuf->totallen = pktsize; 385 sqbuf->tcphlen = sizeof(*tcph) + opts_len; 386 sqbuf->scratch = cm_node; 387 388 tcph = (struct tcphdr *)buf; 389 buf += sizeof(*tcph); 390 391 tcph->th_sport = htons(cm_node->loc_port); 392 tcph->th_dport = htons(cm_node->rem_port); 393 tcph->th_seq = htonl(cm_node->tcp_cntxt.loc_seq_num); 394 395 if (flags & SET_ACK) { 396 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt; 397 tcph->th_ack = htonl(cm_node->tcp_cntxt.loc_ack_num); 398 tcph->th_flags |= TH_ACK; 399 } else { 400 tcph->th_ack = 0; 401 } 402 403 if (flags & SET_SYN) { 404 cm_node->tcp_cntxt.loc_seq_num++; 405 tcph->th_flags |= TH_SYN; 406 } else { 407 cm_node->tcp_cntxt.loc_seq_num += hdr_len + pd_len; 408 } 409 410 if (flags & SET_FIN) { 411 cm_node->tcp_cntxt.loc_seq_num++; 412 tcph->th_flags |= TH_FIN; 413 } 414 415 if (flags & SET_RST) 416 tcph->th_flags |= TH_RST; 417 418 tcph->th_off = (u16)((sizeof(*tcph) + opts_len + 3) >> 2); 419 sqbuf->tcphlen = tcph->th_off << 2; 420 tcph->th_win = htons(cm_node->tcp_cntxt.rcv_wnd); 421 tcph->th_urp = 0; 422 423 if (opts_len) { 424 memcpy(buf, options->addr, opts_len); 425 buf += opts_len; 426 } 427 428 if (hdr_len) { 429 memcpy(buf, hdr->addr, hdr_len); 430 buf += hdr_len; 431 } 432 433 if (pdata && pdata->addr) 434 memcpy(buf, pdata->addr, pdata->size); 435 436 atomic_set(&sqbuf->refcount, 1); 437 438 irdma_debug_buf(vsi->dev, IRDMA_DEBUG_ILQ, "TRANSMIT ILQ BUFFER", 439 sqbuf->mem.va, sqbuf->totallen); 440 441 return sqbuf; 442 } 443 444 /** 445 * irdma_form_uda_cm_frame - get a free packet and build frame full tcpip packet 446 * @cm_node: connection's node ionfo to use in frame 447 * @options: pointer to options info 448 * @hdr: pointer mpa header 449 * @pdata: pointer to private data 450 * @flags: indicates FIN or ACK 451 */ 452 static struct irdma_puda_buf * 453 irdma_form_uda_cm_frame(struct irdma_cm_node *cm_node, 454 struct irdma_kmem_info *options, 455 struct irdma_kmem_info *hdr, 456 struct irdma_mpa_priv_info *pdata, 457 u8 flags) 458 { 459 struct irdma_puda_buf *sqbuf; 460 struct irdma_sc_vsi *vsi = &cm_node->iwdev->vsi; 461 u8 *buf; 462 463 struct tcphdr *tcph; 464 struct ip *iph; 465 struct ip6_hdr *ip6h; 466 struct ether_header *ethh; 467 u16 pktsize; 468 u16 eth_hlen = ETH_HLEN; 469 u32 opts_len = 0; 470 u32 pd_len = 0; 471 u32 hdr_len = 0; 472 473 u16 vtag; 474 475 sqbuf = irdma_puda_get_bufpool(vsi->ilq); 476 if (!sqbuf) 477 return NULL; 478 479 buf = sqbuf->mem.va; 480 481 if (options) 482 opts_len = (u32)options->size; 483 484 if (hdr) 485 hdr_len = hdr->size; 486 487 if (pdata) 488 pd_len = pdata->size; 489 490 if (cm_node->vlan_id < VLAN_N_VID) 491 eth_hlen += 4; 492 493 if (cm_node->ipv4) 494 pktsize = sizeof(*iph) + sizeof(*tcph); 495 else 496 pktsize = sizeof(*ip6h) + sizeof(*tcph); 497 pktsize += opts_len + hdr_len + pd_len; 498 499 memset(buf, 0, eth_hlen + pktsize); 500 501 sqbuf->totallen = pktsize + eth_hlen; 502 sqbuf->maclen = eth_hlen; 503 sqbuf->tcphlen = sizeof(*tcph) + opts_len; 504 sqbuf->scratch = cm_node; 505 506 ethh = (struct ether_header *)buf; 507 buf += eth_hlen; 508 509 if (cm_node->do_lpb) 510 sqbuf->do_lpb = true; 511 512 if (cm_node->ipv4) { 513 sqbuf->ipv4 = true; 514 515 iph = (struct ip *)buf; 516 buf += sizeof(*iph); 517 tcph = (struct tcphdr *)buf; 518 buf += sizeof(*tcph); 519 520 ether_addr_copy(ethh->ether_dhost, cm_node->rem_mac); 521 ether_addr_copy(ethh->ether_shost, cm_node->loc_mac); 522 if (cm_node->vlan_id < VLAN_N_VID) { 523 ((struct ether_vlan_header *)ethh)->evl_proto = 524 htons(ETH_P_8021Q); 525 vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) | 526 cm_node->vlan_id; 527 ((struct ether_vlan_header *)ethh)->evl_tag = htons(vtag); 528 529 ((struct ether_vlan_header *)ethh)->evl_encap_proto = 530 htons(ETH_P_IP); 531 } else { 532 ethh->ether_type = htons(ETH_P_IP); 533 } 534 535 iph->ip_v = IPVERSION; 536 iph->ip_hl = 5; /* 5 * 4Byte words, IP headr len */ 537 iph->ip_tos = cm_node->tos; 538 iph->ip_len = htons(pktsize); 539 iph->ip_id = htons(++cm_node->tcp_cntxt.loc_id); 540 541 iph->ip_off = htons(0x4000); 542 iph->ip_ttl = 0x40; 543 iph->ip_p = IPPROTO_TCP; 544 iph->ip_src.s_addr = htonl(cm_node->loc_addr[0]); 545 iph->ip_dst.s_addr = htonl(cm_node->rem_addr[0]); 546 } else { 547 sqbuf->ipv4 = false; 548 ip6h = (struct ip6_hdr *)buf; 549 buf += sizeof(*ip6h); 550 tcph = (struct tcphdr *)buf; 551 buf += sizeof(*tcph); 552 553 ether_addr_copy(ethh->ether_dhost, cm_node->rem_mac); 554 ether_addr_copy(ethh->ether_shost, cm_node->loc_mac); 555 if (cm_node->vlan_id < VLAN_N_VID) { 556 ((struct ether_vlan_header *)ethh)->evl_proto = 557 htons(ETH_P_8021Q); 558 vtag = (cm_node->user_pri << VLAN_PRIO_SHIFT) | 559 cm_node->vlan_id; 560 ((struct ether_vlan_header *)ethh)->evl_tag = htons(vtag); 561 ((struct ether_vlan_header *)ethh)->evl_encap_proto = 562 htons(ETH_P_IPV6); 563 } else { 564 ethh->ether_type = htons(ETH_P_IPV6); 565 } 566 ip6h->ip6_vfc = 6 << 4; 567 ip6h->ip6_vfc |= cm_node->tos >> 4; 568 ip6h->ip6_flow = cm_node->tos << 20; 569 ip6h->ip6_plen = htons(pktsize - sizeof(*ip6h)); 570 ip6h->ip6_nxt = 6; 571 ip6h->ip6_hops = 128; 572 irdma_copy_ip_htonl(ip6h->ip6_src.__u6_addr.__u6_addr32, 573 cm_node->loc_addr); 574 irdma_copy_ip_htonl(ip6h->ip6_dst.__u6_addr.__u6_addr32, 575 cm_node->rem_addr); 576 } 577 578 tcph->th_sport = htons(cm_node->loc_port); 579 tcph->th_dport = htons(cm_node->rem_port); 580 tcph->th_seq = htonl(cm_node->tcp_cntxt.loc_seq_num); 581 582 if (flags & SET_ACK) { 583 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt; 584 tcph->th_ack = htonl(cm_node->tcp_cntxt.loc_ack_num); 585 tcph->th_flags |= TH_ACK; 586 } else { 587 tcph->th_ack = 0; 588 } 589 590 if (flags & SET_SYN) { 591 cm_node->tcp_cntxt.loc_seq_num++; 592 tcph->th_flags |= TH_SYN; 593 } else { 594 cm_node->tcp_cntxt.loc_seq_num += hdr_len + pd_len; 595 } 596 597 if (flags & SET_FIN) { 598 cm_node->tcp_cntxt.loc_seq_num++; 599 tcph->th_flags |= TH_FIN; 600 } 601 602 if (flags & SET_RST) 603 tcph->th_flags |= TH_RST; 604 605 tcph->th_off = (u16)((sizeof(*tcph) + opts_len + 3) >> 2); 606 sqbuf->tcphlen = tcph->th_off << 2; 607 tcph->th_win = htons(cm_node->tcp_cntxt.rcv_wnd); 608 tcph->th_urp = 0; 609 610 if (opts_len) { 611 memcpy(buf, options->addr, opts_len); 612 buf += opts_len; 613 } 614 615 if (hdr_len) { 616 memcpy(buf, hdr->addr, hdr_len); 617 buf += hdr_len; 618 } 619 620 if (pdata && pdata->addr) 621 memcpy(buf, pdata->addr, pdata->size); 622 623 atomic_set(&sqbuf->refcount, 1); 624 625 irdma_debug_buf(vsi->dev, IRDMA_DEBUG_ILQ, "TRANSMIT ILQ BUFFER", 626 sqbuf->mem.va, sqbuf->totallen); 627 628 return sqbuf; 629 } 630 631 /** 632 * irdma_send_reset - Send RST packet 633 * @cm_node: connection's node 634 */ 635 int 636 irdma_send_reset(struct irdma_cm_node *cm_node) 637 { 638 struct irdma_puda_buf *sqbuf; 639 int flags = SET_RST | SET_ACK; 640 641 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, NULL, NULL, 642 flags); 643 if (!sqbuf) 644 return -ENOMEM; 645 646 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 647 "caller: %pS cm_node %p cm_id=%p accel=%d state=%d rem_port=0x%04x, loc_port=0x%04x rem_addr=%x loc_addr=%x\n", 648 __builtin_return_address(0), cm_node, cm_node->cm_id, 649 cm_node->accelerated, cm_node->state, cm_node->rem_port, 650 cm_node->loc_port, cm_node->rem_addr[0], 651 cm_node->loc_addr[0]); 652 653 return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 0, 654 1); 655 } 656 657 /** 658 * irdma_active_open_err - send event for active side cm error 659 * @cm_node: connection's node 660 * @reset: Flag to send reset or not 661 */ 662 static void 663 irdma_active_open_err(struct irdma_cm_node *cm_node, bool reset) 664 { 665 irdma_cleanup_retrans_entry(cm_node); 666 cm_node->cm_core->stats_connect_errs++; 667 if (reset) { 668 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 669 "cm_node=%p state=%d\n", cm_node, cm_node->state); 670 atomic_inc(&cm_node->refcnt); 671 irdma_send_reset(cm_node); 672 } 673 674 cm_node->state = IRDMA_CM_STATE_CLOSED; 675 irdma_create_event(cm_node, IRDMA_CM_EVENT_ABORTED); 676 } 677 678 /** 679 * irdma_passive_open_err - handle passive side cm error 680 * @cm_node: connection's node 681 * @reset: send reset or just free cm_node 682 */ 683 static void 684 irdma_passive_open_err(struct irdma_cm_node *cm_node, bool reset) 685 { 686 irdma_cleanup_retrans_entry(cm_node); 687 cm_node->cm_core->stats_passive_errs++; 688 cm_node->state = IRDMA_CM_STATE_CLOSED; 689 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 690 "cm_node=%p state=%d\n", cm_node, cm_node->state); 691 if (reset) 692 irdma_send_reset(cm_node); 693 else 694 irdma_rem_ref_cm_node(cm_node); 695 } 696 697 /** 698 * irdma_event_connect_error - to create connect error event 699 * @event: cm information for connect event 700 */ 701 static void 702 irdma_event_connect_error(struct irdma_cm_event *event) 703 { 704 struct irdma_qp *iwqp; 705 struct iw_cm_id *cm_id; 706 707 cm_id = event->cm_node->cm_id; 708 if (!cm_id) 709 return; 710 711 iwqp = cm_id->provider_data; 712 713 if (!iwqp || !iwqp->iwdev) 714 return; 715 716 iwqp->cm_id = NULL; 717 cm_id->provider_data = NULL; 718 irdma_send_cm_event(event->cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 719 -ECONNRESET); 720 irdma_rem_ref_cm_node(event->cm_node); 721 } 722 723 /** 724 * irdma_process_options - process options from TCP header 725 * @cm_node: connection's node 726 * @optionsloc: point to start of options 727 * @optionsize: size of all options 728 * @syn_pkt: flag if syn packet 729 */ 730 static int 731 irdma_process_options(struct irdma_cm_node *cm_node, u8 *optionsloc, 732 u32 optionsize, u32 syn_pkt) 733 { 734 u32 tmp; 735 u32 offset = 0; 736 union all_known_options *all_options; 737 char got_mss_option = 0; 738 739 while (offset < optionsize) { 740 all_options = (union all_known_options *)(optionsloc + offset); 741 switch (all_options->base.optionnum) { 742 case OPTION_NUM_EOL: 743 offset = optionsize; 744 break; 745 case OPTION_NUM_NONE: 746 offset += 1; 747 continue; 748 case OPTION_NUM_MSS: 749 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 750 "MSS Length: %d Offset: %d Size: %d\n", 751 all_options->mss.len, offset, optionsize); 752 got_mss_option = 1; 753 if (all_options->mss.len != 4) 754 return -EINVAL; 755 tmp = ntohs(all_options->mss.mss); 756 if ((cm_node->ipv4 && 757 (tmp + IRDMA_MTU_TO_MSS_IPV4) < IRDMA_MIN_MTU_IPV4) || 758 (!cm_node->ipv4 && 759 (tmp + IRDMA_MTU_TO_MSS_IPV6) < IRDMA_MIN_MTU_IPV6)) 760 return -EINVAL; 761 if (tmp < cm_node->tcp_cntxt.mss) 762 cm_node->tcp_cntxt.mss = tmp; 763 break; 764 case OPTION_NUM_WINDOW_SCALE: 765 cm_node->tcp_cntxt.snd_wscale = 766 all_options->windowscale.shiftcount; 767 break; 768 default: 769 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 770 "Unsupported TCP Option: %x\n", 771 all_options->base.optionnum); 772 break; 773 } 774 offset += all_options->base.len; 775 } 776 if (!got_mss_option && syn_pkt) 777 cm_node->tcp_cntxt.mss = IRDMA_CM_DEFAULT_MSS; 778 779 return 0; 780 } 781 782 /** 783 * irdma_handle_tcp_options - setup TCP context info after parsing TCP options 784 * @cm_node: connection's node 785 * @tcph: pointer tcp header 786 * @optionsize: size of options rcvd 787 * @passive: active or passive flag 788 */ 789 static int 790 irdma_handle_tcp_options(struct irdma_cm_node *cm_node, 791 struct tcphdr *tcph, int optionsize, 792 int passive) 793 { 794 u8 *optionsloc = (u8 *)&tcph[1]; 795 int ret; 796 797 if (optionsize) { 798 ret = irdma_process_options(cm_node, optionsloc, optionsize, 799 (u32)tcph->th_flags & TH_SYN); 800 if (ret) { 801 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 802 "Node %p, Sending Reset\n", cm_node); 803 if (passive) 804 irdma_passive_open_err(cm_node, true); 805 else 806 irdma_active_open_err(cm_node, true); 807 return ret; 808 } 809 } 810 811 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->th_win) 812 << cm_node->tcp_cntxt.snd_wscale; 813 814 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd) 815 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd; 816 817 return 0; 818 } 819 820 /** 821 * irdma_build_mpa_v1 - build a MPA V1 frame 822 * @cm_node: connection's node 823 * @start_addr: address where to build frame 824 * @mpa_key: to do read0 or write0 825 */ 826 static void 827 irdma_build_mpa_v1(struct irdma_cm_node *cm_node, void *start_addr, 828 u8 mpa_key) 829 { 830 struct ietf_mpa_v1 *mpa_frame = start_addr; 831 832 switch (mpa_key) { 833 case MPA_KEY_REQUEST: 834 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE); 835 break; 836 case MPA_KEY_REPLY: 837 memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE); 838 break; 839 default: 840 break; 841 } 842 mpa_frame->flags = IETF_MPA_FLAGS_CRC; 843 mpa_frame->rev = cm_node->mpa_frame_rev; 844 mpa_frame->priv_data_len = htons(cm_node->pdata.size); 845 } 846 847 /** 848 * irdma_build_mpa_v2 - build a MPA V2 frame 849 * @cm_node: connection's node 850 * @start_addr: buffer start address 851 * @mpa_key: to do read0 or write0 852 */ 853 static void 854 irdma_build_mpa_v2(struct irdma_cm_node *cm_node, void *start_addr, 855 u8 mpa_key) 856 { 857 struct ietf_mpa_v2 *mpa_frame = start_addr; 858 struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg; 859 u16 ctrl_ird, ctrl_ord; 860 861 /* initialize the upper 5 bytes of the frame */ 862 irdma_build_mpa_v1(cm_node, start_addr, mpa_key); 863 mpa_frame->flags |= IETF_MPA_V2_FLAG; 864 if (cm_node->iwdev->iw_ooo) { 865 mpa_frame->flags |= IETF_MPA_FLAGS_MARKERS; 866 cm_node->rcv_mark_en = true; 867 } 868 mpa_frame->priv_data_len = cpu_to_be16(be16_to_cpu(mpa_frame->priv_data_len) + 869 IETF_RTR_MSG_SIZE); 870 871 /* initialize RTR msg */ 872 if (cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) { 873 ctrl_ird = IETF_NO_IRD_ORD; 874 ctrl_ord = IETF_NO_IRD_ORD; 875 } else { 876 ctrl_ird = (cm_node->ird_size > IETF_NO_IRD_ORD) ? 877 IETF_NO_IRD_ORD : 878 cm_node->ird_size; 879 ctrl_ord = (cm_node->ord_size > IETF_NO_IRD_ORD) ? 880 IETF_NO_IRD_ORD : 881 cm_node->ord_size; 882 } 883 ctrl_ird |= IETF_PEER_TO_PEER; 884 885 switch (mpa_key) { 886 case MPA_KEY_REQUEST: 887 ctrl_ord |= IETF_RDMA0_WRITE; 888 ctrl_ord |= IETF_RDMA0_READ; 889 break; 890 case MPA_KEY_REPLY: 891 switch (cm_node->send_rdma0_op) { 892 case SEND_RDMA_WRITE_ZERO: 893 ctrl_ord |= IETF_RDMA0_WRITE; 894 break; 895 case SEND_RDMA_READ_ZERO: 896 ctrl_ord |= IETF_RDMA0_READ; 897 break; 898 } 899 break; 900 default: 901 break; 902 } 903 rtr_msg->ctrl_ird = htons(ctrl_ird); 904 rtr_msg->ctrl_ord = htons(ctrl_ord); 905 } 906 907 /** 908 * irdma_cm_build_mpa_frame - build mpa frame for mpa version 1 or version 2 909 * @cm_node: connection's node 910 * @mpa: mpa: data buffer 911 * @mpa_key: to do read0 or write0 912 */ 913 static int 914 irdma_cm_build_mpa_frame(struct irdma_cm_node *cm_node, 915 struct irdma_kmem_info *mpa, u8 mpa_key) 916 { 917 int hdr_len = 0; 918 919 switch (cm_node->mpa_frame_rev) { 920 case IETF_MPA_V1: 921 hdr_len = sizeof(struct ietf_mpa_v1); 922 irdma_build_mpa_v1(cm_node, mpa->addr, mpa_key); 923 break; 924 case IETF_MPA_V2: 925 hdr_len = sizeof(struct ietf_mpa_v2); 926 irdma_build_mpa_v2(cm_node, mpa->addr, mpa_key); 927 break; 928 default: 929 break; 930 } 931 932 return hdr_len; 933 } 934 935 /** 936 * irdma_send_mpa_request - active node send mpa request to passive node 937 * @cm_node: connection's node 938 */ 939 static int 940 irdma_send_mpa_request(struct irdma_cm_node *cm_node) 941 { 942 struct irdma_puda_buf *sqbuf; 943 944 cm_node->mpa_hdr.addr = &cm_node->mpa_v2_frame; 945 cm_node->mpa_hdr.size = irdma_cm_build_mpa_frame(cm_node, 946 &cm_node->mpa_hdr, 947 MPA_KEY_REQUEST); 948 if (!cm_node->mpa_hdr.size) { 949 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 950 "mpa size = %d\n", cm_node->mpa_hdr.size); 951 return -EINVAL; 952 } 953 954 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, 955 &cm_node->mpa_hdr, 956 &cm_node->pdata, SET_ACK); 957 if (!sqbuf) 958 return -ENOMEM; 959 960 return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 1, 961 0); 962 } 963 964 /** 965 * irdma_send_mpa_reject - 966 * @cm_node: connection's node 967 * @pdata: reject data for connection 968 * @plen: length of reject data 969 */ 970 static int 971 irdma_send_mpa_reject(struct irdma_cm_node *cm_node, 972 const void *pdata, u8 plen) 973 { 974 struct irdma_puda_buf *sqbuf; 975 struct irdma_mpa_priv_info priv_info; 976 977 cm_node->mpa_hdr.addr = &cm_node->mpa_v2_frame; 978 cm_node->mpa_hdr.size = irdma_cm_build_mpa_frame(cm_node, 979 &cm_node->mpa_hdr, 980 MPA_KEY_REPLY); 981 982 cm_node->mpa_v2_frame.flags |= IETF_MPA_FLAGS_REJECT; 983 priv_info.addr = pdata; 984 priv_info.size = plen; 985 986 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, 987 &cm_node->mpa_hdr, &priv_info, 988 SET_ACK | SET_FIN); 989 if (!sqbuf) 990 return -ENOMEM; 991 992 cm_node->state = IRDMA_CM_STATE_FIN_WAIT1; 993 994 return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 1, 995 0); 996 } 997 998 /** 999 * irdma_negotiate_mpa_v2_ird_ord - negotiate MPAv2 IRD/ORD 1000 * @cm_node: connection's node 1001 * @buf: Data pointer 1002 */ 1003 static int 1004 irdma_negotiate_mpa_v2_ird_ord(struct irdma_cm_node *cm_node, 1005 u8 *buf) 1006 { 1007 struct ietf_mpa_v2 *mpa_v2_frame; 1008 struct ietf_rtr_msg *rtr_msg; 1009 u16 ird_size; 1010 u16 ord_size; 1011 u16 ctrl_ord; 1012 u16 ctrl_ird; 1013 1014 mpa_v2_frame = (struct ietf_mpa_v2 *)buf; 1015 rtr_msg = &mpa_v2_frame->rtr_msg; 1016 1017 /* parse rtr message */ 1018 ctrl_ord = ntohs(rtr_msg->ctrl_ord); 1019 ctrl_ird = ntohs(rtr_msg->ctrl_ird); 1020 ird_size = ctrl_ird & IETF_NO_IRD_ORD; 1021 ord_size = ctrl_ord & IETF_NO_IRD_ORD; 1022 1023 if (!(ctrl_ird & IETF_PEER_TO_PEER)) 1024 return -EOPNOTSUPP; 1025 1026 if (ird_size == IETF_NO_IRD_ORD || ord_size == IETF_NO_IRD_ORD) { 1027 cm_node->mpav2_ird_ord = IETF_NO_IRD_ORD; 1028 goto negotiate_done; 1029 } 1030 1031 if (cm_node->state != IRDMA_CM_STATE_MPAREQ_SENT) { 1032 /* responder */ 1033 if (!ord_size && (ctrl_ord & IETF_RDMA0_READ)) 1034 cm_node->ird_size = 1; 1035 if (cm_node->ord_size > ird_size) 1036 cm_node->ord_size = ird_size; 1037 } else { 1038 /* initiator */ 1039 if (!ird_size && (ctrl_ord & IETF_RDMA0_READ)) 1040 /* Remote peer doesn't support RDMA0_READ */ 1041 return -EOPNOTSUPP; 1042 1043 if (cm_node->ord_size > ird_size) 1044 cm_node->ord_size = ird_size; 1045 1046 if (cm_node->ird_size < ord_size) 1047 /* no resources available */ 1048 return -EINVAL; 1049 } 1050 1051 negotiate_done: 1052 if (ctrl_ord & IETF_RDMA0_READ) 1053 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO; 1054 else if (ctrl_ord & IETF_RDMA0_WRITE) 1055 cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO; 1056 else 1057 /* Not supported RDMA0 operation */ 1058 return -EOPNOTSUPP; 1059 1060 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 1061 "MPAV2 Negotiated ORD: %d, IRD: %d\n", cm_node->ord_size, 1062 cm_node->ird_size); 1063 return 0; 1064 } 1065 1066 /** 1067 * irdma_parse_mpa - process an IETF MPA frame 1068 * @cm_node: connection's node 1069 * @buf: Data pointer 1070 * @type: to return accept or reject 1071 * @len: Len of mpa buffer 1072 */ 1073 static int 1074 irdma_parse_mpa(struct irdma_cm_node *cm_node, u8 *buf, u32 *type, 1075 u32 len) 1076 { 1077 struct ietf_mpa_v1 *mpa_frame; 1078 int mpa_hdr_len, priv_data_len, ret; 1079 1080 *type = IRDMA_MPA_REQUEST_ACCEPT; 1081 1082 if (len < sizeof(struct ietf_mpa_v1)) { 1083 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 1084 "ietf buffer small (%x)\n", len); 1085 return -EINVAL; 1086 } 1087 1088 mpa_frame = (struct ietf_mpa_v1 *)buf; 1089 mpa_hdr_len = sizeof(struct ietf_mpa_v1); 1090 priv_data_len = ntohs(mpa_frame->priv_data_len); 1091 1092 if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) { 1093 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 1094 "private_data too big %d\n", priv_data_len); 1095 return -EOVERFLOW; 1096 } 1097 1098 if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) { 1099 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 1100 "unsupported mpa rev = %d\n", mpa_frame->rev); 1101 return -EINVAL; 1102 } 1103 1104 if (mpa_frame->rev > cm_node->mpa_frame_rev) { 1105 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 1106 "rev %d\n", mpa_frame->rev); 1107 return -EINVAL; 1108 } 1109 1110 cm_node->mpa_frame_rev = mpa_frame->rev; 1111 if (cm_node->state != IRDMA_CM_STATE_MPAREQ_SENT) { 1112 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, 1113 IETF_MPA_KEY_SIZE)) { 1114 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 1115 "Unexpected MPA Key received\n"); 1116 return -EINVAL; 1117 } 1118 } else { 1119 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, 1120 IETF_MPA_KEY_SIZE)) { 1121 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 1122 "Unexpected MPA Key received\n"); 1123 return -EINVAL; 1124 } 1125 } 1126 1127 if (priv_data_len + mpa_hdr_len > len) { 1128 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 1129 "ietf buffer len(%x + %x != %x)\n", priv_data_len, 1130 mpa_hdr_len, len); 1131 return -EOVERFLOW; 1132 } 1133 1134 if (len > IRDMA_MAX_CM_BUF) { 1135 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 1136 "ietf buffer large len = %d\n", len); 1137 return -EOVERFLOW; 1138 } 1139 1140 switch (mpa_frame->rev) { 1141 case IETF_MPA_V2: 1142 mpa_hdr_len += IETF_RTR_MSG_SIZE; 1143 ret = irdma_negotiate_mpa_v2_ird_ord(cm_node, buf); 1144 if (ret) 1145 return ret; 1146 break; 1147 case IETF_MPA_V1: 1148 default: 1149 break; 1150 } 1151 1152 memcpy(cm_node->pdata_buf, buf + mpa_hdr_len, priv_data_len); 1153 cm_node->pdata.size = priv_data_len; 1154 1155 if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT) 1156 *type = IRDMA_MPA_REQUEST_REJECT; 1157 1158 if (mpa_frame->flags & IETF_MPA_FLAGS_MARKERS) 1159 cm_node->snd_mark_en = true; 1160 1161 return 0; 1162 } 1163 1164 /** 1165 * irdma_schedule_cm_timer 1166 * @cm_node: connection's node 1167 * @sqbuf: buffer to send 1168 * @type: if it is send or close 1169 * @send_retrans: if rexmits to be done 1170 * @close_when_complete: is cm_node to be removed 1171 * 1172 * note - cm_node needs to be protected before calling this. Encase in: 1173 * irdma_rem_ref_cm_node(cm_core, cm_node); 1174 * irdma_schedule_cm_timer(...) 1175 * atomic_inc(&cm_node->refcnt); 1176 */ 1177 int 1178 irdma_schedule_cm_timer(struct irdma_cm_node *cm_node, 1179 struct irdma_puda_buf *sqbuf, 1180 enum irdma_timer_type type, int send_retrans, 1181 int close_when_complete) 1182 { 1183 struct irdma_sc_vsi *vsi = &cm_node->iwdev->vsi; 1184 struct irdma_cm_core *cm_core = cm_node->cm_core; 1185 struct irdma_timer_entry *new_send; 1186 u32 was_timer_set; 1187 unsigned long flags; 1188 1189 new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC); 1190 if (!new_send) { 1191 if (type != IRDMA_TIMER_TYPE_CLOSE) 1192 irdma_free_sqbuf(vsi, sqbuf); 1193 return -ENOMEM; 1194 } 1195 1196 new_send->retrycount = IRDMA_DEFAULT_RETRYS; 1197 new_send->retranscount = IRDMA_DEFAULT_RETRANS; 1198 new_send->sqbuf = sqbuf; 1199 new_send->timetosend = jiffies; 1200 new_send->type = type; 1201 new_send->send_retrans = send_retrans; 1202 new_send->close_when_complete = close_when_complete; 1203 1204 if (type == IRDMA_TIMER_TYPE_CLOSE) { 1205 new_send->timetosend += (HZ / 10); 1206 if (cm_node->close_entry) { 1207 kfree(new_send); 1208 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 1209 "already close entry\n"); 1210 return -EINVAL; 1211 } 1212 1213 cm_node->close_entry = new_send; 1214 } else { /* type == IRDMA_TIMER_TYPE_SEND */ 1215 spin_lock_irqsave(&cm_node->retrans_list_lock, flags); 1216 cm_node->send_entry = new_send; 1217 atomic_inc(&cm_node->refcnt); 1218 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); 1219 new_send->timetosend = jiffies + IRDMA_RETRY_TIMEOUT; 1220 1221 atomic_inc(&sqbuf->refcount); 1222 irdma_puda_send_buf(vsi->ilq, sqbuf); 1223 if (!send_retrans) { 1224 irdma_cleanup_retrans_entry(cm_node); 1225 if (close_when_complete) 1226 irdma_rem_ref_cm_node(cm_node); 1227 return 0; 1228 } 1229 } 1230 1231 spin_lock_irqsave(&cm_core->ht_lock, flags); 1232 was_timer_set = timer_pending(&cm_core->tcp_timer); 1233 1234 if (!was_timer_set) { 1235 cm_core->tcp_timer.expires = new_send->timetosend; 1236 add_timer(&cm_core->tcp_timer); 1237 } 1238 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 1239 1240 return 0; 1241 } 1242 1243 /** 1244 * irdma_retrans_expired - Could not rexmit the packet 1245 * @cm_node: connection's node 1246 */ 1247 static void 1248 irdma_retrans_expired(struct irdma_cm_node *cm_node) 1249 { 1250 enum irdma_cm_node_state state = cm_node->state; 1251 1252 cm_node->state = IRDMA_CM_STATE_CLOSED; 1253 switch (state) { 1254 case IRDMA_CM_STATE_SYN_RCVD: 1255 case IRDMA_CM_STATE_CLOSING: 1256 irdma_rem_ref_cm_node(cm_node); 1257 break; 1258 case IRDMA_CM_STATE_FIN_WAIT1: 1259 case IRDMA_CM_STATE_LAST_ACK: 1260 irdma_send_reset(cm_node); 1261 break; 1262 default: 1263 atomic_inc(&cm_node->refcnt); 1264 irdma_send_reset(cm_node); 1265 irdma_create_event(cm_node, IRDMA_CM_EVENT_ABORTED); 1266 break; 1267 } 1268 } 1269 1270 /** 1271 * irdma_handle_close_entry - for handling retry/timeouts 1272 * @cm_node: connection's node 1273 * @rem_node: flag for remove cm_node 1274 */ 1275 static void 1276 irdma_handle_close_entry(struct irdma_cm_node *cm_node, 1277 u32 rem_node) 1278 { 1279 struct irdma_timer_entry *close_entry = cm_node->close_entry; 1280 struct irdma_qp *iwqp; 1281 unsigned long flags; 1282 1283 if (!close_entry) 1284 return; 1285 iwqp = (struct irdma_qp *)close_entry->sqbuf; 1286 if (iwqp) { 1287 spin_lock_irqsave(&iwqp->lock, flags); 1288 if (iwqp->cm_id) { 1289 iwqp->hw_tcp_state = IRDMA_TCP_STATE_CLOSED; 1290 iwqp->hw_iwarp_state = IRDMA_QP_STATE_ERROR; 1291 iwqp->last_aeq = IRDMA_AE_RESET_SENT; 1292 iwqp->ibqp_state = IB_QPS_ERR; 1293 spin_unlock_irqrestore(&iwqp->lock, flags); 1294 irdma_cm_disconn(iwqp); 1295 } else { 1296 spin_unlock_irqrestore(&iwqp->lock, flags); 1297 } 1298 } else if (rem_node) { 1299 /* TIME_WAIT state */ 1300 irdma_rem_ref_cm_node(cm_node); 1301 } 1302 1303 kfree(close_entry); 1304 cm_node->close_entry = NULL; 1305 } 1306 1307 /** 1308 * irdma_cm_timer_tick - system's timer expired callback 1309 * @t: Pointer to timer_list 1310 */ 1311 static void 1312 irdma_cm_timer_tick(struct timer_list *t) 1313 { 1314 unsigned long nexttimeout = jiffies + IRDMA_LONG_TIME; 1315 struct irdma_cm_node *cm_node; 1316 struct irdma_timer_entry *send_entry, *close_entry; 1317 struct list_head *list_core_temp; 1318 struct list_head *list_node; 1319 struct irdma_cm_core *cm_core = from_timer(cm_core, t, tcp_timer); 1320 struct irdma_sc_vsi *vsi; 1321 u32 settimer = 0; 1322 unsigned long timetosend; 1323 unsigned long flags; 1324 struct list_head timer_list; 1325 1326 INIT_LIST_HEAD(&timer_list); 1327 1328 rcu_read_lock(); 1329 irdma_timer_list_prep(cm_core, &timer_list); 1330 rcu_read_unlock(); 1331 1332 list_for_each_safe(list_node, list_core_temp, &timer_list) { 1333 cm_node = container_of(list_node, struct irdma_cm_node, 1334 timer_entry); 1335 close_entry = cm_node->close_entry; 1336 1337 if (close_entry) { 1338 if (time_after(close_entry->timetosend, jiffies)) { 1339 if (nexttimeout > close_entry->timetosend || 1340 !settimer) { 1341 nexttimeout = close_entry->timetosend; 1342 settimer = 1; 1343 } 1344 } else { 1345 irdma_handle_close_entry(cm_node, 1); 1346 } 1347 } 1348 1349 spin_lock_irqsave(&cm_node->retrans_list_lock, flags); 1350 1351 send_entry = cm_node->send_entry; 1352 if (!send_entry) 1353 goto done; 1354 if (time_after(send_entry->timetosend, jiffies)) { 1355 if (cm_node->state != IRDMA_CM_STATE_OFFLOADED) { 1356 if (nexttimeout > send_entry->timetosend || 1357 !settimer) { 1358 nexttimeout = send_entry->timetosend; 1359 settimer = 1; 1360 } 1361 } else { 1362 irdma_free_retrans_entry(cm_node); 1363 } 1364 goto done; 1365 } 1366 1367 if (cm_node->state == IRDMA_CM_STATE_OFFLOADED || 1368 cm_node->state == IRDMA_CM_STATE_CLOSED) { 1369 irdma_free_retrans_entry(cm_node); 1370 goto done; 1371 } 1372 1373 if (!send_entry->retranscount || !send_entry->retrycount) { 1374 irdma_free_retrans_entry(cm_node); 1375 1376 spin_unlock_irqrestore(&cm_node->retrans_list_lock, 1377 flags); 1378 irdma_retrans_expired(cm_node); 1379 cm_node->state = IRDMA_CM_STATE_CLOSED; 1380 spin_lock_irqsave(&cm_node->retrans_list_lock, flags); 1381 goto done; 1382 } 1383 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); 1384 1385 vsi = &cm_node->iwdev->vsi; 1386 if (!cm_node->ack_rcvd) { 1387 atomic_inc(&send_entry->sqbuf->refcount); 1388 irdma_puda_send_buf(vsi->ilq, send_entry->sqbuf); 1389 cm_node->cm_core->stats_pkt_retrans++; 1390 } 1391 1392 spin_lock_irqsave(&cm_node->retrans_list_lock, flags); 1393 if (send_entry->send_retrans) { 1394 send_entry->retranscount--; 1395 timetosend = (IRDMA_RETRY_TIMEOUT << 1396 (IRDMA_DEFAULT_RETRANS - 1397 send_entry->retranscount)); 1398 1399 send_entry->timetosend = jiffies + 1400 min(timetosend, IRDMA_MAX_TIMEOUT); 1401 if (nexttimeout > send_entry->timetosend || !settimer) { 1402 nexttimeout = send_entry->timetosend; 1403 settimer = 1; 1404 } 1405 } else { 1406 int close_when_complete; 1407 1408 close_when_complete = send_entry->close_when_complete; 1409 irdma_free_retrans_entry(cm_node); 1410 if (close_when_complete) 1411 irdma_rem_ref_cm_node(cm_node); 1412 } 1413 done: 1414 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); 1415 irdma_rem_ref_cm_node(cm_node); 1416 } 1417 1418 if (settimer) { 1419 spin_lock_irqsave(&cm_core->ht_lock, flags); 1420 if (!timer_pending(&cm_core->tcp_timer)) { 1421 cm_core->tcp_timer.expires = nexttimeout; 1422 add_timer(&cm_core->tcp_timer); 1423 } 1424 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 1425 } 1426 } 1427 1428 /** 1429 * irdma_send_syn - send SYN packet 1430 * @cm_node: connection's node 1431 * @sendack: flag to set ACK bit or not 1432 */ 1433 int 1434 irdma_send_syn(struct irdma_cm_node *cm_node, u32 sendack) 1435 { 1436 struct irdma_puda_buf *sqbuf; 1437 int flags = SET_SYN; 1438 char optionsbuf[sizeof(struct option_mss) + 1439 sizeof(struct option_windowscale) + 1440 sizeof(struct option_base) + TCP_OPTIONS_PADDING]; 1441 struct irdma_kmem_info opts; 1442 int optionssize = 0; 1443 /* Sending MSS option */ 1444 union all_known_options *options; 1445 1446 opts.addr = optionsbuf; 1447 if (!cm_node) 1448 return -EINVAL; 1449 1450 options = (union all_known_options *)&optionsbuf[optionssize]; 1451 options->mss.optionnum = OPTION_NUM_MSS; 1452 options->mss.len = sizeof(struct option_mss); 1453 options->mss.mss = htons(cm_node->tcp_cntxt.mss); 1454 optionssize += sizeof(struct option_mss); 1455 1456 options = (union all_known_options *)&optionsbuf[optionssize]; 1457 options->windowscale.optionnum = OPTION_NUM_WINDOW_SCALE; 1458 options->windowscale.len = sizeof(struct option_windowscale); 1459 options->windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale; 1460 optionssize += sizeof(struct option_windowscale); 1461 options = (union all_known_options *)&optionsbuf[optionssize]; 1462 options->eol = OPTION_NUM_EOL; 1463 optionssize += 1; 1464 1465 if (sendack) 1466 flags |= SET_ACK; 1467 1468 opts.size = optionssize; 1469 1470 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, &opts, NULL, NULL, 1471 flags); 1472 if (!sqbuf) 1473 return -ENOMEM; 1474 1475 return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 1, 1476 0); 1477 } 1478 1479 /** 1480 * irdma_send_ack - Send ACK packet 1481 * @cm_node: connection's node 1482 */ 1483 void 1484 irdma_send_ack(struct irdma_cm_node *cm_node) 1485 { 1486 struct irdma_puda_buf *sqbuf; 1487 struct irdma_sc_vsi *vsi = &cm_node->iwdev->vsi; 1488 1489 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, NULL, NULL, 1490 SET_ACK); 1491 if (sqbuf) 1492 irdma_puda_send_buf(vsi->ilq, sqbuf); 1493 } 1494 1495 /** 1496 * irdma_send_fin - Send FIN pkt 1497 * @cm_node: connection's node 1498 */ 1499 static int 1500 irdma_send_fin(struct irdma_cm_node *cm_node) 1501 { 1502 struct irdma_puda_buf *sqbuf; 1503 1504 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, NULL, NULL, 1505 SET_ACK | SET_FIN); 1506 if (!sqbuf) 1507 return -ENOMEM; 1508 1509 return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 1, 1510 0); 1511 } 1512 1513 /** 1514 * irdma_find_listener - find a cm node listening on this addr-port pair 1515 * @cm_core: cm's core 1516 * @dst_addr: listener ip addr 1517 * @ipv4: flag indicating IPv4 when true 1518 * @dst_port: listener tcp port num 1519 * @vlan_id: virtual LAN ID 1520 * @listener_state: state to match with listen node's 1521 */ 1522 static struct irdma_cm_listener * 1523 irdma_find_listener(struct irdma_cm_core *cm_core, u32 *dst_addr, bool ipv4, u16 dst_port, 1524 u16 vlan_id, enum irdma_cm_listener_state listener_state) 1525 { 1526 struct irdma_cm_listener *listen_node; 1527 static const u32 ip_zero[4] = {0, 0, 0, 0}; 1528 u32 listen_addr[4]; 1529 u16 listen_port; 1530 unsigned long flags; 1531 1532 /* walk list and find cm_node associated with this session ID */ 1533 spin_lock_irqsave(&cm_core->listen_list_lock, flags); 1534 list_for_each_entry(listen_node, &cm_core->listen_list, list) { 1535 memcpy(listen_addr, listen_node->loc_addr, sizeof(listen_addr)); 1536 listen_port = listen_node->loc_port; 1537 if (listen_node->ipv4 != ipv4 || listen_port != dst_port || 1538 !(listener_state & listen_node->listener_state)) 1539 continue; 1540 /* compare node pair, return node handle if a match */ 1541 if (!memcmp(listen_addr, ip_zero, sizeof(listen_addr)) || 1542 (!memcmp(listen_addr, dst_addr, sizeof(listen_addr)) && 1543 vlan_id == listen_node->vlan_id)) { 1544 atomic_inc(&listen_node->refcnt); 1545 spin_unlock_irqrestore(&cm_core->listen_list_lock, 1546 flags); 1547 return listen_node; 1548 } 1549 } 1550 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); 1551 1552 return NULL; 1553 } 1554 1555 /** 1556 * irdma_del_multiple_qhash - Remove qhash and child listens 1557 * @iwdev: iWarp device 1558 * @cm_info: CM info for parent listen node 1559 * @cm_parent_listen_node: The parent listen node 1560 */ 1561 static int 1562 irdma_del_multiple_qhash(struct irdma_device *iwdev, 1563 struct irdma_cm_info *cm_info, 1564 struct irdma_cm_listener *cm_parent_listen_node) 1565 { 1566 struct irdma_cm_listener *child_listen_node; 1567 struct list_head *pos, *tpos; 1568 unsigned long flags; 1569 int ret = -EINVAL; 1570 1571 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags); 1572 list_for_each_safe(pos, tpos, 1573 &cm_parent_listen_node->child_listen_list) { 1574 child_listen_node = list_entry(pos, struct irdma_cm_listener, 1575 child_listen_list); 1576 if (child_listen_node->ipv4) 1577 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 1578 "removing child listen for IP=%x, port=%d, vlan=%d\n", 1579 child_listen_node->loc_addr[0], 1580 child_listen_node->loc_port, 1581 child_listen_node->vlan_id); 1582 else 1583 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 1584 "removing child listen for IP=%x:%x:%x:%x, port=%d, vlan=%d\n", 1585 IRDMA_PRINT_IP6(child_listen_node->loc_addr), 1586 child_listen_node->loc_port, 1587 child_listen_node->vlan_id); 1588 list_del(pos); 1589 memcpy(cm_info->loc_addr, child_listen_node->loc_addr, 1590 sizeof(cm_info->loc_addr)); 1591 cm_info->vlan_id = child_listen_node->vlan_id; 1592 if (child_listen_node->qhash_set) { 1593 ret = irdma_manage_qhash(iwdev, cm_info, 1594 IRDMA_QHASH_TYPE_TCP_SYN, 1595 IRDMA_QHASH_MANAGE_TYPE_DELETE, 1596 NULL, false); 1597 child_listen_node->qhash_set = false; 1598 } else { 1599 ret = 0; 1600 } 1601 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 1602 "Child listen node freed = %p\n", 1603 child_listen_node); 1604 kfree(child_listen_node); 1605 cm_parent_listen_node->cm_core->stats_listen_nodes_destroyed++; 1606 } 1607 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); 1608 1609 return ret; 1610 } 1611 1612 static u8 irdma_iw_get_vlan_prio(u32 *loc_addr, u8 prio, bool ipv4) 1613 { 1614 return prio; 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 if_t 1627 irdma_netdev_vlan_ipv6(u32 *addr, u16 *vlan_id, u8 *mac) 1628 { 1629 if_t ip_dev = NULL; 1630 struct in6_addr laddr6; 1631 struct ifaddr *ifa; 1632 u16 scope_id = 0; 1633 1634 irdma_copy_ip_htonl(laddr6.__u6_addr.__u6_addr32, addr); 1635 if (vlan_id) 1636 *vlan_id = 0xFFFF; /* Match rdma_vlan_dev_vlan_id() */ 1637 if (mac) 1638 eth_zero_addr(mac); 1639 1640 if (IN6_IS_SCOPE_LINKLOCAL(&laddr6) || 1641 IN6_IS_ADDR_MC_INTFACELOCAL(&laddr6)) 1642 scope_id = ntohs(laddr6.__u6_addr.__u6_addr16[1]); 1643 1644 ip_dev = ip6_ifp_find(&init_net, laddr6, scope_id); 1645 if (ip_dev) { 1646 if (vlan_id) 1647 *vlan_id = rdma_vlan_dev_vlan_id(ip_dev); 1648 ifa = if_getifaddr(ip_dev); 1649 if (ifa && ifa->ifa_addr && mac) 1650 ether_addr_copy(mac, if_getlladdr(ip_dev)); 1651 } 1652 1653 return ip_dev; 1654 } 1655 1656 /** 1657 * irdma_get_vlan_ipv4 - Returns the vlan_id for IPv4 address 1658 * @addr: local IPv4 address 1659 */ 1660 u16 1661 irdma_get_vlan_ipv4(u32 *addr) 1662 { 1663 if_t netdev; 1664 u16 vlan_id = 0xFFFF; 1665 1666 netdev = ip_ifp_find(&init_net, htonl(addr[0])); 1667 if (netdev) { 1668 vlan_id = rdma_vlan_dev_vlan_id(netdev); 1669 dev_put(netdev); 1670 } 1671 1672 return vlan_id; 1673 } 1674 1675 static int 1676 irdma_manage_qhash_wait(struct irdma_pci_f *rf, struct irdma_cm_info *cm_info) 1677 { 1678 struct irdma_cqp_request *cqp_request = cm_info->cqp_request; 1679 int cnt = rf->sc_dev.hw_attrs.max_cqp_compl_wait_time_ms * CQP_TIMEOUT_THRESHOLD; 1680 u32 ret_val; 1681 1682 if (!cqp_request) 1683 return -ENOMEM; 1684 do { 1685 irdma_cqp_ce_handler(rf, &rf->ccq.sc_cq); 1686 mdelay(1); 1687 } while (!READ_ONCE(cqp_request->request_done) && --cnt); 1688 1689 ret_val = cqp_request->compl_info.op_ret_val; 1690 irdma_put_cqp_request(&rf->cqp, cqp_request); 1691 if (cnt) { 1692 if (!ret_val) 1693 return 0; 1694 return -EINVAL; 1695 } 1696 1697 return -ETIMEDOUT; 1698 } 1699 1700 /** 1701 * irdma_add_mqh_ifa_cb - Adds multiple qhashes for IPv4/IPv6 1702 * @arg: Calback argument structure from irdma_add_mqh 1703 * @ifa: Current address to compute against 1704 * @count: Current cumulative output of all callbacks in this iteration 1705 * 1706 * Adds a qhash and a child listen node for a single IPv4/IPv6 address 1707 * on the adapter and adds the associated qhash filter 1708 */ 1709 static u_int 1710 irdma_add_mqh_ifa_cb(void *arg, struct ifaddr *ifa, u_int count) 1711 { 1712 struct irdma_add_mqh_cbs *cbs = arg; 1713 struct irdma_cm_listener *child_listen_node; 1714 struct irdma_cm_info *cm_info = cbs->cm_info; 1715 struct irdma_device *iwdev = cbs->iwdev; 1716 struct irdma_cm_listener *cm_parent_listen_node = cbs->cm_listen_node; 1717 if_t ip_dev = ifa->ifa_ifp; 1718 unsigned long flags; 1719 int ret; 1720 1721 if (count) 1722 return 0; 1723 1724 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_ATOMIC); 1725 if (!child_listen_node) { 1726 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 1727 "listener memory allocation\n"); 1728 return -ENOMEM; 1729 } 1730 1731 memcpy(child_listen_node, cm_parent_listen_node, 1732 sizeof(*child_listen_node)); 1733 cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev); 1734 child_listen_node->vlan_id = cm_info->vlan_id; 1735 if (cm_info->ipv4) { 1736 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 1737 "Allocating child CM Listener forIP=%x, vlan_id=%d, MAC=%x:%x:%x:%x:%x:%x\n", 1738 ((struct sockaddr_in *)&ifa->ifa_addr)->sin_addr.s_addr, 1739 rdma_vlan_dev_vlan_id(ip_dev), 1740 if_getlladdr(ip_dev)[0], if_getlladdr(ip_dev)[1], 1741 if_getlladdr(ip_dev)[2], if_getlladdr(ip_dev)[3], 1742 if_getlladdr(ip_dev)[4], if_getlladdr(ip_dev)[5]); 1743 child_listen_node->loc_addr[0] = 1744 ntohl(((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr); 1745 } else { 1746 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 1747 "IP=%x:%x:%x:%x, vlan_id=%d, MAC=%x:%x:%x:%x:%x:%x\n", 1748 IRDMA_PRINT_IP6(&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr), 1749 rdma_vlan_dev_vlan_id(ip_dev), 1750 if_getlladdr(ip_dev)[0], if_getlladdr(ip_dev)[1], 1751 if_getlladdr(ip_dev)[2], if_getlladdr(ip_dev)[3], 1752 if_getlladdr(ip_dev)[4], if_getlladdr(ip_dev)[5]); 1753 irdma_copy_ip_ntohl(child_listen_node->loc_addr, 1754 ((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr.__u6_addr.__u6_addr32); 1755 } 1756 memcpy(cm_info->loc_addr, child_listen_node->loc_addr, 1757 sizeof(cm_info->loc_addr)); 1758 if (!iwdev->vsi.dscp_mode) 1759 cm_info->user_pri = 1760 irdma_iw_get_vlan_prio(child_listen_node->loc_addr, 1761 cm_info->user_pri, 1762 cm_info->ipv4); 1763 ret = irdma_manage_qhash(iwdev, cm_info, 1764 IRDMA_QHASH_TYPE_TCP_SYN, 1765 IRDMA_QHASH_MANAGE_TYPE_ADD, 1766 NULL, false); 1767 if (ret) { 1768 kfree(child_listen_node); 1769 return ret; 1770 } 1771 /* wait for qhash finish */ 1772 ret = irdma_manage_qhash_wait(iwdev->rf, cm_info); 1773 if (ret) { 1774 kfree(child_listen_node); 1775 return ret; 1776 } 1777 1778 child_listen_node->qhash_set = true; 1779 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags); 1780 list_add(&child_listen_node->child_listen_list, 1781 &cm_parent_listen_node->child_listen_list); 1782 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); 1783 cm_parent_listen_node->cm_core->stats_listen_nodes_created++; 1784 1785 return 0; 1786 } 1787 1788 /** 1789 * irdma_add_mqh - Adds multiple qhashes 1790 * @iwdev: iWarp device 1791 * @cm_info: CM info for parent listen node 1792 * @cm_listen_node: The parent listen node 1793 */ 1794 static int 1795 irdma_add_mqh(struct irdma_device *iwdev, 1796 struct irdma_cm_info *cm_info, 1797 struct irdma_cm_listener *cm_listen_node) 1798 { 1799 struct epoch_tracker et; 1800 struct irdma_add_mqh_cbs cbs; 1801 struct if_iter iter; 1802 if_t ifp; 1803 int err = -ENOENT; 1804 1805 cbs.iwdev = iwdev; 1806 cbs.cm_info = cm_info; 1807 cbs.cm_listen_node = cm_listen_node; 1808 1809 VNET_ITERATOR_DECL(vnet_iter); 1810 1811 VNET_LIST_RLOCK(); 1812 NET_EPOCH_ENTER(et); 1813 VNET_FOREACH(vnet_iter) { 1814 CURVNET_SET_QUIET(vnet_iter); 1815 for (ifp = if_iter_start(&iter); ifp != NULL; ifp = if_iter_next(&iter)) { 1816 if (!(if_getflags(ifp) & IFF_UP)) 1817 continue; 1818 1819 if (((rdma_vlan_dev_vlan_id(ifp) >= VLAN_N_VID) || 1820 (rdma_vlan_dev_real_dev(ifp) != iwdev->netdev)) && 1821 ifp != iwdev->netdev) 1822 continue; 1823 1824 if_addr_rlock(ifp); 1825 if (cm_info->ipv4) 1826 err = if_foreach_addr_type(ifp, AF_INET, irdma_add_mqh_ifa_cb, &cbs); 1827 else 1828 err = if_foreach_addr_type(ifp, AF_INET6, irdma_add_mqh_ifa_cb, &cbs); 1829 if_addr_runlock(ifp); 1830 } 1831 if_iter_finish(&iter); 1832 CURVNET_RESTORE(); 1833 } 1834 NET_EPOCH_EXIT(et); 1835 VNET_LIST_RUNLOCK(); 1836 1837 return err; 1838 } 1839 1840 /** 1841 * irdma_reset_list_prep - add connection nodes slated for reset to list 1842 * @cm_core: cm's core 1843 * @listener: pointer to listener node 1844 * @reset_list: a list to which cm_node will be selected 1845 */ 1846 static void 1847 irdma_reset_list_prep(struct irdma_cm_core *cm_core, 1848 struct irdma_cm_listener *listener, 1849 struct list_head *reset_list) 1850 { 1851 struct irdma_cm_node *cm_node; 1852 int bkt; 1853 1854 HASH_FOR_EACH_RCU(cm_core->cm_hash_tbl, bkt, cm_node, list) { 1855 if (cm_node->listener == listener && 1856 !cm_node->accelerated && 1857 atomic_inc_not_zero(&cm_node->refcnt)) 1858 list_add(&cm_node->reset_entry, reset_list); 1859 } 1860 } 1861 1862 /** 1863 * irdma_dec_refcnt_listen - delete listener and associated cm nodes 1864 * @cm_core: cm's core 1865 * @listener: pointer to listener node 1866 * @free_hanging_nodes: to free associated cm_nodes 1867 * @apbvt_del: flag to delete the apbvt 1868 */ 1869 static int 1870 irdma_dec_refcnt_listen(struct irdma_cm_core *cm_core, 1871 struct irdma_cm_listener *listener, 1872 int free_hanging_nodes, bool apbvt_del) 1873 { 1874 struct list_head *list_pos; 1875 struct list_head *list_temp; 1876 struct irdma_cm_node *cm_node; 1877 struct list_head reset_list; 1878 struct irdma_cm_info nfo; 1879 enum irdma_cm_node_state old_state; 1880 unsigned long flags; 1881 int err; 1882 1883 /* free non-accelerated child nodes for this listener */ 1884 INIT_LIST_HEAD(&reset_list); 1885 if (free_hanging_nodes) { 1886 rcu_read_lock(); 1887 irdma_reset_list_prep(cm_core, listener, &reset_list); 1888 rcu_read_unlock(); 1889 } 1890 1891 list_for_each_safe(list_pos, list_temp, &reset_list) { 1892 cm_node = container_of(list_pos, struct irdma_cm_node, 1893 reset_entry); 1894 if (cm_node->state >= IRDMA_CM_STATE_FIN_WAIT1) { 1895 irdma_rem_ref_cm_node(cm_node); 1896 continue; 1897 } 1898 1899 irdma_cleanup_retrans_entry(cm_node); 1900 err = irdma_send_reset(cm_node); 1901 if (err) { 1902 cm_node->state = IRDMA_CM_STATE_CLOSED; 1903 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 1904 "send reset failed\n"); 1905 } else { 1906 old_state = cm_node->state; 1907 cm_node->state = IRDMA_CM_STATE_LISTENER_DESTROYED; 1908 if (old_state != IRDMA_CM_STATE_MPAREQ_RCVD) 1909 irdma_rem_ref_cm_node(cm_node); 1910 } 1911 } 1912 1913 if (atomic_dec_and_test(&listener->refcnt)) { 1914 spin_lock_irqsave(&cm_core->listen_list_lock, flags); 1915 list_del(&listener->list); 1916 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); 1917 1918 if (apbvt_del) 1919 irdma_del_apbvt(listener->iwdev, 1920 listener->apbvt_entry); 1921 memcpy(nfo.loc_addr, listener->loc_addr, sizeof(nfo.loc_addr)); 1922 nfo.loc_port = listener->loc_port; 1923 nfo.ipv4 = listener->ipv4; 1924 nfo.vlan_id = listener->vlan_id; 1925 nfo.user_pri = listener->user_pri; 1926 nfo.qh_qpid = listener->iwdev->vsi.ilq->qp_id; 1927 1928 if (!list_empty(&listener->child_listen_list)) { 1929 irdma_del_multiple_qhash(listener->iwdev, &nfo, 1930 listener); 1931 } else { 1932 if (listener->qhash_set) 1933 irdma_manage_qhash(listener->iwdev, 1934 &nfo, 1935 IRDMA_QHASH_TYPE_TCP_SYN, 1936 IRDMA_QHASH_MANAGE_TYPE_DELETE, 1937 NULL, false); 1938 } 1939 1940 cm_core->stats_listen_destroyed++; 1941 cm_core->stats_listen_nodes_destroyed++; 1942 irdma_debug(&listener->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 1943 "loc_port=0x%04x loc_addr=%x cm_listen_node=%p cm_id=%p qhash_set=%d vlan_id=%d apbvt_del=%d\n", 1944 listener->loc_port, listener->loc_addr[0], listener, 1945 listener->cm_id, listener->qhash_set, 1946 listener->vlan_id, apbvt_del); 1947 kfree(listener); 1948 listener = NULL; 1949 return 0; 1950 } 1951 1952 return -EINVAL; 1953 } 1954 1955 /** 1956 * irdma_cm_del_listen - delete a listener 1957 * @cm_core: cm's core 1958 * @listener: passive connection's listener 1959 * @apbvt_del: flag to delete apbvt 1960 */ 1961 static int 1962 irdma_cm_del_listen(struct irdma_cm_core *cm_core, 1963 struct irdma_cm_listener *listener, 1964 bool apbvt_del) 1965 { 1966 listener->listener_state = IRDMA_CM_LISTENER_PASSIVE_STATE; 1967 listener->cm_id = NULL; 1968 1969 return irdma_dec_refcnt_listen(cm_core, listener, 1, apbvt_del); 1970 } 1971 1972 /** 1973 * irdma_find_node - find a cm node that matches the reference cm node 1974 * @cm_core: cm's core 1975 * @rem_port: remote tcp port num 1976 * @rem_addr: remote ip addr 1977 * @loc_port: local tcp port num 1978 * @loc_addr: local ip addr 1979 * @vlan_id: local VLAN ID 1980 */ 1981 struct irdma_cm_node * 1982 irdma_find_node(struct irdma_cm_core *cm_core, 1983 u16 rem_port, u32 *rem_addr, u16 loc_port, 1984 u32 *loc_addr, u16 vlan_id) 1985 { 1986 struct irdma_cm_node *cm_node; 1987 u32 key = (rem_port << 16) | loc_port; 1988 1989 rcu_read_lock(); 1990 HASH_FOR_EACH_POSSIBLE_RCU(cm_core->cm_hash_tbl, cm_node, list, key) { 1991 if (cm_node->vlan_id == vlan_id && 1992 cm_node->loc_port == loc_port && cm_node->rem_port == rem_port && 1993 !memcmp(cm_node->loc_addr, loc_addr, sizeof(cm_node->loc_addr)) && 1994 !memcmp(cm_node->rem_addr, rem_addr, sizeof(cm_node->rem_addr))) { 1995 if (!atomic_inc_not_zero(&cm_node->refcnt)) 1996 goto exit; 1997 rcu_read_unlock(); 1998 return cm_node; 1999 } 2000 } 2001 2002 exit: 2003 rcu_read_unlock(); 2004 2005 /* no owner node */ 2006 return NULL; 2007 } 2008 2009 /** 2010 * irdma_add_hte_node - add a cm node to the hash table 2011 * @cm_core: cm's core 2012 * @cm_node: connection's node 2013 */ 2014 static void 2015 irdma_add_hte_node(struct irdma_cm_core *cm_core, 2016 struct irdma_cm_node *cm_node) 2017 { 2018 unsigned long flags; 2019 u32 key = (cm_node->rem_port << 16) | cm_node->loc_port; 2020 2021 spin_lock_irqsave(&cm_core->ht_lock, flags); 2022 HASH_ADD_RCU(cm_core->cm_hash_tbl, &cm_node->list, key); 2023 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 2024 } 2025 2026 /** 2027 * irdma_ipv4_is_lpb - check if loopback 2028 * @loc_addr: local addr to compare 2029 * @rem_addr: remote address 2030 */ 2031 bool 2032 irdma_ipv4_is_lpb(u32 loc_addr, u32 rem_addr) 2033 { 2034 return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr); 2035 } 2036 2037 /** 2038 * irdma_ipv6_is_lpb - check if loopback 2039 * @loc_addr: local addr to compare 2040 * @rem_addr: remote address 2041 */ 2042 bool 2043 irdma_ipv6_is_lpb(u32 *loc_addr, u32 *rem_addr) 2044 { 2045 struct in6_addr raddr6; 2046 2047 irdma_copy_ip_htonl(raddr6.__u6_addr.__u6_addr32, rem_addr); 2048 2049 return !memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6); 2050 } 2051 2052 /** 2053 * irdma_cm_create_ah - create a cm address handle 2054 * @cm_node: The connection manager node to create AH for 2055 * @wait: Provides option to wait for ah creation or not 2056 */ 2057 static int 2058 irdma_cm_create_ah(struct irdma_cm_node *cm_node, bool wait) 2059 { 2060 struct irdma_ah_info ah_info = {0}; 2061 struct irdma_device *iwdev = cm_node->iwdev; 2062 #ifdef VIMAGE 2063 struct rdma_cm_id *rdma_id = (struct rdma_cm_id *)cm_node->cm_id->context; 2064 struct vnet *vnet = rdma_id->route.addr.dev_addr.net; 2065 #endif 2066 2067 ether_addr_copy(ah_info.mac_addr, if_getlladdr(iwdev->netdev)); 2068 2069 ah_info.hop_ttl = 0x40; 2070 ah_info.tc_tos = cm_node->tos; 2071 ah_info.vsi = &iwdev->vsi; 2072 2073 if (cm_node->ipv4) { 2074 ah_info.ipv4_valid = true; 2075 ah_info.dest_ip_addr[0] = cm_node->rem_addr[0]; 2076 ah_info.src_ip_addr[0] = cm_node->loc_addr[0]; 2077 CURVNET_SET_QUIET(vnet); 2078 ah_info.do_lpbk = irdma_ipv4_is_lpb(ah_info.src_ip_addr[0], 2079 ah_info.dest_ip_addr[0]); 2080 CURVNET_RESTORE(); 2081 } else { 2082 memcpy(ah_info.dest_ip_addr, cm_node->rem_addr, 2083 sizeof(ah_info.dest_ip_addr)); 2084 memcpy(ah_info.src_ip_addr, cm_node->loc_addr, 2085 sizeof(ah_info.src_ip_addr)); 2086 ah_info.do_lpbk = irdma_ipv6_is_lpb(ah_info.src_ip_addr, 2087 ah_info.dest_ip_addr); 2088 } 2089 2090 ah_info.vlan_tag = cm_node->vlan_id; 2091 if (cm_node->vlan_id < VLAN_N_VID) { 2092 ah_info.insert_vlan_tag = 1; 2093 ah_info.vlan_tag |= cm_node->user_pri << VLAN_PRIO_SHIFT; 2094 } 2095 2096 ah_info.dst_arpindex = 2097 irdma_arp_table(iwdev->rf, ah_info.dest_ip_addr, 2098 NULL, IRDMA_ARP_RESOLVE); 2099 2100 if (irdma_puda_create_ah(&iwdev->rf->sc_dev, &ah_info, wait, 2101 IRDMA_PUDA_RSRC_TYPE_ILQ, cm_node, 2102 &cm_node->ah)) 2103 return -ENOMEM; 2104 2105 return 0; 2106 } 2107 2108 /** 2109 * irdma_cm_free_ah - free a cm address handle 2110 * @cm_node: The connection manager node to create AH for 2111 */ 2112 static void 2113 irdma_cm_free_ah(struct irdma_cm_node *cm_node) 2114 { 2115 struct irdma_device *iwdev = cm_node->iwdev; 2116 2117 irdma_puda_free_ah(&iwdev->rf->sc_dev, cm_node->ah); 2118 cm_node->ah = NULL; 2119 } 2120 2121 /** 2122 * irdma_make_cm_node - create a new instance of a cm node 2123 * @cm_core: cm's core 2124 * @iwdev: iwarp device structure 2125 * @cm_info: quad info for connection 2126 * @listener: passive connection's listener 2127 */ 2128 static struct irdma_cm_node * 2129 irdma_make_cm_node(struct irdma_cm_core *cm_core, struct irdma_device *iwdev, 2130 struct irdma_cm_info *cm_info, 2131 struct irdma_cm_listener *listener) 2132 { 2133 struct irdma_cm_node *cm_node; 2134 int arpindex; 2135 if_t netdev = iwdev->netdev; 2136 2137 /* create an hte and cm_node for this instance */ 2138 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC); 2139 if (!cm_node) 2140 return NULL; 2141 2142 /* set our node specific transport info */ 2143 cm_node->ipv4 = cm_info->ipv4; 2144 cm_node->vlan_id = cm_info->vlan_id; 2145 if (cm_node->vlan_id >= VLAN_N_VID && iwdev->dcb_vlan_mode) 2146 cm_node->vlan_id = 0; 2147 cm_node->tos = cm_info->tos; 2148 cm_node->user_pri = cm_info->user_pri; 2149 if (listener) { 2150 if (listener->tos != cm_info->tos) 2151 irdma_dev_warn(&iwdev->ibdev, 2152 "application TOS[%d] and remote client TOS[%d] mismatch\n", 2153 listener->tos, cm_info->tos); 2154 if (iwdev->vsi.dscp_mode) { 2155 cm_node->user_pri = listener->user_pri; 2156 } else { 2157 cm_node->tos = max(listener->tos, cm_info->tos); 2158 cm_node->user_pri = rt_tos2priority(cm_node->tos); 2159 cm_node->user_pri = 2160 irdma_iw_get_vlan_prio(cm_info->loc_addr, 2161 cm_node->user_pri, 2162 cm_info->ipv4); 2163 } 2164 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_DCB, 2165 "listener: TOS:[%d] UP:[%d]\n", cm_node->tos, 2166 cm_node->user_pri); 2167 } 2168 memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr)); 2169 memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr)); 2170 cm_node->loc_port = cm_info->loc_port; 2171 cm_node->rem_port = cm_info->rem_port; 2172 2173 cm_node->mpa_frame_rev = IRDMA_CM_DEFAULT_MPA_VER; 2174 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO; 2175 cm_node->iwdev = iwdev; 2176 cm_node->dev = &iwdev->rf->sc_dev; 2177 2178 cm_node->ird_size = cm_node->dev->hw_attrs.max_hw_ird; 2179 cm_node->ord_size = cm_node->dev->hw_attrs.max_hw_ord; 2180 2181 cm_node->listener = listener; 2182 cm_node->cm_id = cm_info->cm_id; 2183 ether_addr_copy(cm_node->loc_mac, if_getlladdr(netdev)); 2184 spin_lock_init(&cm_node->retrans_list_lock); 2185 cm_node->ack_rcvd = false; 2186 2187 init_completion(&cm_node->establish_comp); 2188 atomic_set(&cm_node->refcnt, 1); 2189 /* associate our parent CM core */ 2190 cm_node->cm_core = cm_core; 2191 cm_node->tcp_cntxt.loc_id = IRDMA_CM_DEFAULT_LOCAL_ID; 2192 cm_node->tcp_cntxt.rcv_wscale = iwdev->rcv_wscale; 2193 cm_node->tcp_cntxt.rcv_wnd = iwdev->rcv_wnd >> cm_node->tcp_cntxt.rcv_wscale; 2194 kc_set_loc_seq_num_mss(cm_node); 2195 2196 arpindex = irdma_resolve_neigh_lpb_chk(iwdev, cm_node, cm_info); 2197 if (arpindex < 0) 2198 goto err; 2199 2200 ether_addr_copy(cm_node->rem_mac, iwdev->rf->arp_table[arpindex].mac_addr); 2201 irdma_add_hte_node(cm_core, cm_node); 2202 cm_core->stats_nodes_created++; 2203 return cm_node; 2204 2205 err: 2206 kfree(cm_node); 2207 2208 return NULL; 2209 } 2210 2211 static void 2212 irdma_destroy_connection(struct irdma_cm_node *cm_node) 2213 { 2214 struct irdma_cm_core *cm_core = cm_node->cm_core; 2215 struct irdma_qp *iwqp; 2216 struct irdma_cm_info nfo; 2217 2218 /* if the node is destroyed before connection was accelerated */ 2219 if (!cm_node->accelerated && cm_node->accept_pend) { 2220 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2221 "node destroyed before established\n"); 2222 atomic_dec(&cm_node->listener->pend_accepts_cnt); 2223 } 2224 if (cm_node->close_entry) 2225 irdma_handle_close_entry(cm_node, 0); 2226 if (cm_node->listener) { 2227 irdma_dec_refcnt_listen(cm_core, cm_node->listener, 0, true); 2228 } else { 2229 if (cm_node->apbvt_set) { 2230 irdma_del_apbvt(cm_node->iwdev, cm_node->apbvt_entry); 2231 cm_node->apbvt_set = 0; 2232 } 2233 irdma_get_addr_info(cm_node, &nfo); 2234 if (cm_node->qhash_set) { 2235 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id; 2236 irdma_manage_qhash(cm_node->iwdev, &nfo, 2237 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 2238 IRDMA_QHASH_MANAGE_TYPE_DELETE, NULL, 2239 false); 2240 cm_node->qhash_set = 0; 2241 } 2242 } 2243 2244 iwqp = cm_node->iwqp; 2245 if (iwqp) { 2246 cm_node->cm_id->rem_ref(cm_node->cm_id); 2247 cm_node->cm_id = NULL; 2248 iwqp->cm_id = NULL; 2249 irdma_qp_rem_ref(&iwqp->ibqp); 2250 cm_node->iwqp = NULL; 2251 } else if (cm_node->qhash_set) { 2252 irdma_get_addr_info(cm_node, &nfo); 2253 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id; 2254 irdma_manage_qhash(cm_node->iwdev, &nfo, 2255 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 2256 IRDMA_QHASH_MANAGE_TYPE_DELETE, NULL, false); 2257 cm_node->qhash_set = 0; 2258 } 2259 2260 cm_core->cm_free_ah(cm_node); 2261 } 2262 2263 /** 2264 * irdma_rem_ref_cm_node - destroy an instance of a cm node 2265 * @cm_node: connection's node 2266 */ 2267 void 2268 irdma_rem_ref_cm_node(struct irdma_cm_node *cm_node) 2269 { 2270 struct irdma_cm_core *cm_core = cm_node->cm_core; 2271 unsigned long flags; 2272 2273 spin_lock_irqsave(&cm_core->ht_lock, flags); 2274 2275 if (!atomic_dec_and_test(&cm_node->refcnt)) { 2276 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 2277 return; 2278 } 2279 if (cm_node->iwqp) { 2280 cm_node->iwqp->cm_node = NULL; 2281 cm_node->iwqp->cm_id = NULL; 2282 } 2283 HASH_DEL_RCU(cm_core->cm_hash_tbl, &cm_node->list); 2284 cm_node->cm_core->stats_nodes_destroyed++; 2285 2286 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 2287 2288 irdma_destroy_connection(cm_node); 2289 2290 kfree_rcu(cm_node, rcu_head); 2291 } 2292 2293 /** 2294 * irdma_handle_fin_pkt - FIN packet received 2295 * @cm_node: connection's node 2296 */ 2297 static void 2298 irdma_handle_fin_pkt(struct irdma_cm_node *cm_node) 2299 { 2300 switch (cm_node->state) { 2301 case IRDMA_CM_STATE_SYN_RCVD: 2302 case IRDMA_CM_STATE_SYN_SENT: 2303 case IRDMA_CM_STATE_ESTABLISHED: 2304 case IRDMA_CM_STATE_MPAREJ_RCVD: 2305 cm_node->tcp_cntxt.rcv_nxt++; 2306 irdma_cleanup_retrans_entry(cm_node); 2307 cm_node->state = IRDMA_CM_STATE_LAST_ACK; 2308 irdma_send_fin(cm_node); 2309 break; 2310 case IRDMA_CM_STATE_MPAREQ_SENT: 2311 irdma_create_event(cm_node, IRDMA_CM_EVENT_ABORTED); 2312 cm_node->tcp_cntxt.rcv_nxt++; 2313 irdma_cleanup_retrans_entry(cm_node); 2314 cm_node->state = IRDMA_CM_STATE_CLOSED; 2315 atomic_inc(&cm_node->refcnt); 2316 irdma_send_reset(cm_node); 2317 break; 2318 case IRDMA_CM_STATE_FIN_WAIT1: 2319 cm_node->tcp_cntxt.rcv_nxt++; 2320 irdma_cleanup_retrans_entry(cm_node); 2321 cm_node->state = IRDMA_CM_STATE_CLOSING; 2322 irdma_send_ack(cm_node); 2323 /* 2324 * Wait for ACK as this is simultaneous close. After we receive ACK, do not send anything. Just rm the 2325 * node. 2326 */ 2327 break; 2328 case IRDMA_CM_STATE_FIN_WAIT2: 2329 cm_node->tcp_cntxt.rcv_nxt++; 2330 irdma_cleanup_retrans_entry(cm_node); 2331 cm_node->state = IRDMA_CM_STATE_TIME_WAIT; 2332 irdma_send_ack(cm_node); 2333 irdma_schedule_cm_timer(cm_node, NULL, IRDMA_TIMER_TYPE_CLOSE, 2334 1, 0); 2335 break; 2336 case IRDMA_CM_STATE_TIME_WAIT: 2337 cm_node->tcp_cntxt.rcv_nxt++; 2338 irdma_cleanup_retrans_entry(cm_node); 2339 cm_node->state = IRDMA_CM_STATE_CLOSED; 2340 irdma_rem_ref_cm_node(cm_node); 2341 break; 2342 case IRDMA_CM_STATE_OFFLOADED: 2343 default: 2344 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2345 "bad state node state = %d\n", cm_node->state); 2346 break; 2347 } 2348 } 2349 2350 /** 2351 * irdma_handle_rst_pkt - process received RST packet 2352 * @cm_node: connection's node 2353 * @rbuf: receive buffer 2354 */ 2355 static void 2356 irdma_handle_rst_pkt(struct irdma_cm_node *cm_node, 2357 struct irdma_puda_buf *rbuf) 2358 { 2359 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2360 "caller: %pS cm_node=%p state=%d rem_port=0x%04x loc_port=0x%04x rem_addr=%x loc_addr=%x\n", 2361 __builtin_return_address(0), cm_node, cm_node->state, 2362 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr[0], 2363 cm_node->loc_addr[0]); 2364 2365 irdma_cleanup_retrans_entry(cm_node); 2366 switch (cm_node->state) { 2367 case IRDMA_CM_STATE_SYN_SENT: 2368 case IRDMA_CM_STATE_MPAREQ_SENT: 2369 switch (cm_node->mpa_frame_rev) { 2370 case IETF_MPA_V2: 2371 /* Drop down to MPA_V1 */ 2372 cm_node->mpa_frame_rev = IETF_MPA_V1; 2373 /* send a syn and goto syn sent state */ 2374 cm_node->state = IRDMA_CM_STATE_SYN_SENT; 2375 if (irdma_send_syn(cm_node, 0)) 2376 irdma_active_open_err(cm_node, false); 2377 break; 2378 case IETF_MPA_V1: 2379 default: 2380 irdma_active_open_err(cm_node, false); 2381 break; 2382 } 2383 break; 2384 case IRDMA_CM_STATE_MPAREQ_RCVD: 2385 atomic_inc(&cm_node->passive_state); 2386 break; 2387 case IRDMA_CM_STATE_ESTABLISHED: 2388 case IRDMA_CM_STATE_SYN_RCVD: 2389 case IRDMA_CM_STATE_LISTENING: 2390 irdma_passive_open_err(cm_node, false); 2391 break; 2392 case IRDMA_CM_STATE_OFFLOADED: 2393 irdma_active_open_err(cm_node, false); 2394 break; 2395 case IRDMA_CM_STATE_CLOSED: 2396 break; 2397 case IRDMA_CM_STATE_FIN_WAIT2: 2398 case IRDMA_CM_STATE_FIN_WAIT1: 2399 case IRDMA_CM_STATE_LAST_ACK: 2400 case IRDMA_CM_STATE_TIME_WAIT: 2401 cm_node->state = IRDMA_CM_STATE_CLOSED; 2402 irdma_rem_ref_cm_node(cm_node); 2403 break; 2404 default: 2405 break; 2406 } 2407 } 2408 2409 /** 2410 * irdma_handle_rcv_mpa - Process a recv'd mpa buffer 2411 * @cm_node: connection's node 2412 * @rbuf: receive buffer 2413 */ 2414 static void 2415 irdma_handle_rcv_mpa(struct irdma_cm_node *cm_node, 2416 struct irdma_puda_buf *rbuf) 2417 { 2418 int err; 2419 int datasize = rbuf->datalen; 2420 u8 *dataloc = rbuf->data; 2421 2422 enum irdma_cm_event_type type = IRDMA_CM_EVENT_UNKNOWN; 2423 u32 res_type; 2424 2425 err = irdma_parse_mpa(cm_node, dataloc, &res_type, datasize); 2426 if (err) { 2427 if (cm_node->state == IRDMA_CM_STATE_MPAREQ_SENT) 2428 irdma_active_open_err(cm_node, true); 2429 else 2430 irdma_passive_open_err(cm_node, true); 2431 return; 2432 } 2433 2434 switch (cm_node->state) { 2435 case IRDMA_CM_STATE_ESTABLISHED: 2436 if (res_type == IRDMA_MPA_REQUEST_REJECT) 2437 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2438 "state for reject\n"); 2439 cm_node->state = IRDMA_CM_STATE_MPAREQ_RCVD; 2440 type = IRDMA_CM_EVENT_MPA_REQ; 2441 irdma_send_ack(cm_node); /* ACK received MPA request */ 2442 atomic_set(&cm_node->passive_state, 2443 IRDMA_PASSIVE_STATE_INDICATED); 2444 break; 2445 case IRDMA_CM_STATE_MPAREQ_SENT: 2446 irdma_cleanup_retrans_entry(cm_node); 2447 if (res_type == IRDMA_MPA_REQUEST_REJECT) { 2448 type = IRDMA_CM_EVENT_MPA_REJECT; 2449 cm_node->state = IRDMA_CM_STATE_MPAREJ_RCVD; 2450 } else { 2451 type = IRDMA_CM_EVENT_CONNECTED; 2452 cm_node->state = IRDMA_CM_STATE_OFFLOADED; 2453 } 2454 irdma_send_ack(cm_node); 2455 break; 2456 default: 2457 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2458 "wrong cm_node state=%d\n", cm_node->state); 2459 break; 2460 } 2461 irdma_create_event(cm_node, type); 2462 } 2463 2464 /** 2465 * irdma_check_syn - Check for error on received syn ack 2466 * @cm_node: connection's node 2467 * @tcph: pointer tcp header 2468 */ 2469 static int 2470 irdma_check_syn(struct irdma_cm_node *cm_node, struct tcphdr *tcph) 2471 { 2472 if (ntohl(tcph->th_ack) != cm_node->tcp_cntxt.loc_seq_num) { 2473 irdma_active_open_err(cm_node, true); 2474 return 1; 2475 } 2476 2477 return 0; 2478 } 2479 2480 /** 2481 * irdma_check_seq - check seq numbers if OK 2482 * @cm_node: connection's node 2483 * @tcph: pointer tcp header 2484 */ 2485 static int 2486 irdma_check_seq(struct irdma_cm_node *cm_node, struct tcphdr *tcph) 2487 { 2488 u32 seq; 2489 u32 ack_seq; 2490 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num; 2491 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt; 2492 u32 rcv_wnd; 2493 int err = 0; 2494 2495 seq = ntohl(tcph->th_seq); 2496 ack_seq = ntohl(tcph->th_ack); 2497 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd; 2498 if (ack_seq != loc_seq_num || 2499 !between(seq, rcv_nxt, (rcv_nxt + rcv_wnd))) 2500 err = -1; 2501 if (err) 2502 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2503 "seq number err\n"); 2504 2505 return err; 2506 } 2507 2508 void 2509 irdma_add_conn_est_qh(struct irdma_cm_node *cm_node) 2510 { 2511 struct irdma_cm_info nfo; 2512 2513 irdma_get_addr_info(cm_node, &nfo); 2514 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id; 2515 irdma_manage_qhash(cm_node->iwdev, &nfo, 2516 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 2517 IRDMA_QHASH_MANAGE_TYPE_ADD, 2518 cm_node, false); 2519 cm_node->qhash_set = true; 2520 } 2521 2522 /** 2523 * irdma_handle_syn_pkt - is for Passive node 2524 * @cm_node: connection's node 2525 * @rbuf: receive buffer 2526 */ 2527 static void 2528 irdma_handle_syn_pkt(struct irdma_cm_node *cm_node, 2529 struct irdma_puda_buf *rbuf) 2530 { 2531 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2532 int err; 2533 u32 inc_sequence; 2534 int optionsize; 2535 2536 optionsize = (tcph->th_off << 2) - sizeof(struct tcphdr); 2537 inc_sequence = ntohl(tcph->th_seq); 2538 2539 switch (cm_node->state) { 2540 case IRDMA_CM_STATE_SYN_SENT: 2541 case IRDMA_CM_STATE_MPAREQ_SENT: 2542 /* Rcvd syn on active open connection */ 2543 irdma_active_open_err(cm_node, 1); 2544 break; 2545 case IRDMA_CM_STATE_LISTENING: 2546 /* Passive OPEN */ 2547 if (atomic_read(&cm_node->listener->pend_accepts_cnt) > 2548 cm_node->listener->backlog) { 2549 cm_node->cm_core->stats_backlog_drops++; 2550 irdma_passive_open_err(cm_node, false); 2551 break; 2552 } 2553 err = irdma_handle_tcp_options(cm_node, tcph, optionsize, 1); 2554 if (err) { 2555 irdma_passive_open_err(cm_node, false); 2556 /* drop pkt */ 2557 break; 2558 } 2559 err = cm_node->cm_core->cm_create_ah(cm_node, false); 2560 if (err) { 2561 irdma_passive_open_err(cm_node, false); 2562 /* drop pkt */ 2563 break; 2564 } 2565 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; 2566 cm_node->accept_pend = 1; 2567 atomic_inc(&cm_node->listener->pend_accepts_cnt); 2568 2569 cm_node->state = IRDMA_CM_STATE_SYN_RCVD; 2570 break; 2571 case IRDMA_CM_STATE_CLOSED: 2572 irdma_cleanup_retrans_entry(cm_node); 2573 atomic_inc(&cm_node->refcnt); 2574 irdma_send_reset(cm_node); 2575 break; 2576 case IRDMA_CM_STATE_OFFLOADED: 2577 case IRDMA_CM_STATE_ESTABLISHED: 2578 case IRDMA_CM_STATE_FIN_WAIT1: 2579 case IRDMA_CM_STATE_FIN_WAIT2: 2580 case IRDMA_CM_STATE_MPAREQ_RCVD: 2581 case IRDMA_CM_STATE_LAST_ACK: 2582 case IRDMA_CM_STATE_CLOSING: 2583 case IRDMA_CM_STATE_UNKNOWN: 2584 default: 2585 break; 2586 } 2587 } 2588 2589 /** 2590 * irdma_handle_synack_pkt - Process SYN+ACK packet (active side) 2591 * @cm_node: connection's node 2592 * @rbuf: receive buffer 2593 */ 2594 static void 2595 irdma_handle_synack_pkt(struct irdma_cm_node *cm_node, 2596 struct irdma_puda_buf *rbuf) 2597 { 2598 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2599 int err; 2600 u32 inc_sequence; 2601 int optionsize; 2602 2603 optionsize = (tcph->th_off << 2) - sizeof(struct tcphdr); 2604 inc_sequence = ntohl(tcph->th_seq); 2605 switch (cm_node->state) { 2606 case IRDMA_CM_STATE_SYN_SENT: 2607 irdma_cleanup_retrans_entry(cm_node); 2608 /* active open */ 2609 if (irdma_check_syn(cm_node, tcph)) { 2610 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2611 "check syn fail\n"); 2612 return; 2613 } 2614 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->th_ack); 2615 /* setup options */ 2616 err = irdma_handle_tcp_options(cm_node, tcph, optionsize, 0); 2617 if (err) { 2618 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2619 "cm_node=%p tcp_options failed\n", cm_node); 2620 break; 2621 } 2622 irdma_cleanup_retrans_entry(cm_node); 2623 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; 2624 irdma_send_ack(cm_node); /* ACK for the syn_ack */ 2625 err = irdma_send_mpa_request(cm_node); 2626 if (err) { 2627 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2628 "cm_node=%p irdma_send_mpa_request failed\n", 2629 cm_node); 2630 break; 2631 } 2632 cm_node->state = IRDMA_CM_STATE_MPAREQ_SENT; 2633 break; 2634 case IRDMA_CM_STATE_MPAREQ_RCVD: 2635 irdma_passive_open_err(cm_node, true); 2636 break; 2637 case IRDMA_CM_STATE_LISTENING: 2638 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->th_ack); 2639 irdma_cleanup_retrans_entry(cm_node); 2640 cm_node->state = IRDMA_CM_STATE_CLOSED; 2641 irdma_send_reset(cm_node); 2642 break; 2643 case IRDMA_CM_STATE_CLOSED: 2644 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->th_ack); 2645 irdma_cleanup_retrans_entry(cm_node); 2646 atomic_inc(&cm_node->refcnt); 2647 irdma_send_reset(cm_node); 2648 break; 2649 case IRDMA_CM_STATE_ESTABLISHED: 2650 case IRDMA_CM_STATE_FIN_WAIT1: 2651 case IRDMA_CM_STATE_FIN_WAIT2: 2652 case IRDMA_CM_STATE_LAST_ACK: 2653 case IRDMA_CM_STATE_OFFLOADED: 2654 case IRDMA_CM_STATE_CLOSING: 2655 case IRDMA_CM_STATE_UNKNOWN: 2656 case IRDMA_CM_STATE_MPAREQ_SENT: 2657 default: 2658 break; 2659 } 2660 } 2661 2662 /** 2663 * irdma_handle_ack_pkt - process packet with ACK 2664 * @cm_node: connection's node 2665 * @rbuf: receive buffer 2666 */ 2667 static int 2668 irdma_handle_ack_pkt(struct irdma_cm_node *cm_node, 2669 struct irdma_puda_buf *rbuf) 2670 { 2671 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2672 u32 inc_sequence; 2673 int ret; 2674 int optionsize; 2675 u32 datasize = rbuf->datalen; 2676 2677 optionsize = (tcph->th_off << 2) - sizeof(struct tcphdr); 2678 2679 if (irdma_check_seq(cm_node, tcph)) 2680 return -EINVAL; 2681 2682 inc_sequence = ntohl(tcph->th_seq); 2683 switch (cm_node->state) { 2684 case IRDMA_CM_STATE_SYN_RCVD: 2685 irdma_cleanup_retrans_entry(cm_node); 2686 ret = irdma_handle_tcp_options(cm_node, tcph, optionsize, 1); 2687 if (ret) 2688 return ret; 2689 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->th_ack); 2690 cm_node->state = IRDMA_CM_STATE_ESTABLISHED; 2691 if (datasize) { 2692 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; 2693 irdma_handle_rcv_mpa(cm_node, rbuf); 2694 } 2695 break; 2696 case IRDMA_CM_STATE_ESTABLISHED: 2697 irdma_cleanup_retrans_entry(cm_node); 2698 if (datasize) { 2699 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; 2700 irdma_handle_rcv_mpa(cm_node, rbuf); 2701 } 2702 break; 2703 case IRDMA_CM_STATE_MPAREQ_SENT: 2704 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->th_ack); 2705 if (datasize) { 2706 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; 2707 cm_node->ack_rcvd = false; 2708 irdma_handle_rcv_mpa(cm_node, rbuf); 2709 } else { 2710 cm_node->ack_rcvd = true; 2711 } 2712 break; 2713 case IRDMA_CM_STATE_LISTENING: 2714 irdma_cleanup_retrans_entry(cm_node); 2715 cm_node->state = IRDMA_CM_STATE_CLOSED; 2716 irdma_send_reset(cm_node); 2717 break; 2718 case IRDMA_CM_STATE_CLOSED: 2719 irdma_cleanup_retrans_entry(cm_node); 2720 atomic_inc(&cm_node->refcnt); 2721 irdma_send_reset(cm_node); 2722 break; 2723 case IRDMA_CM_STATE_LAST_ACK: 2724 case IRDMA_CM_STATE_CLOSING: 2725 irdma_cleanup_retrans_entry(cm_node); 2726 cm_node->state = IRDMA_CM_STATE_CLOSED; 2727 irdma_rem_ref_cm_node(cm_node); 2728 break; 2729 case IRDMA_CM_STATE_FIN_WAIT1: 2730 irdma_cleanup_retrans_entry(cm_node); 2731 cm_node->state = IRDMA_CM_STATE_FIN_WAIT2; 2732 break; 2733 case IRDMA_CM_STATE_SYN_SENT: 2734 case IRDMA_CM_STATE_FIN_WAIT2: 2735 case IRDMA_CM_STATE_OFFLOADED: 2736 case IRDMA_CM_STATE_MPAREQ_RCVD: 2737 case IRDMA_CM_STATE_UNKNOWN: 2738 default: 2739 irdma_cleanup_retrans_entry(cm_node); 2740 break; 2741 } 2742 2743 return 0; 2744 } 2745 2746 /** 2747 * irdma_process_pkt - process cm packet 2748 * @cm_node: connection's node 2749 * @rbuf: receive buffer 2750 */ 2751 static void 2752 irdma_process_pkt(struct irdma_cm_node *cm_node, 2753 struct irdma_puda_buf *rbuf) 2754 { 2755 enum irdma_tcpip_pkt_type pkt_type = IRDMA_PKT_TYPE_UNKNOWN; 2756 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2757 u32 fin_set = 0; 2758 int err; 2759 2760 if (tcph->th_flags & TH_RST) { 2761 pkt_type = IRDMA_PKT_TYPE_RST; 2762 } else if (tcph->th_flags & TH_SYN) { 2763 pkt_type = IRDMA_PKT_TYPE_SYN; 2764 if (tcph->th_flags & TH_ACK) 2765 pkt_type = IRDMA_PKT_TYPE_SYNACK; 2766 } else if (tcph->th_flags & TH_ACK) { 2767 pkt_type = IRDMA_PKT_TYPE_ACK; 2768 } 2769 if (tcph->th_flags & TH_FIN) 2770 fin_set = 1; 2771 2772 switch (pkt_type) { 2773 case IRDMA_PKT_TYPE_SYN: 2774 irdma_handle_syn_pkt(cm_node, rbuf); 2775 break; 2776 case IRDMA_PKT_TYPE_SYNACK: 2777 irdma_handle_synack_pkt(cm_node, rbuf); 2778 break; 2779 case IRDMA_PKT_TYPE_ACK: 2780 err = irdma_handle_ack_pkt(cm_node, rbuf); 2781 if (fin_set && !err) 2782 irdma_handle_fin_pkt(cm_node); 2783 break; 2784 case IRDMA_PKT_TYPE_RST: 2785 irdma_handle_rst_pkt(cm_node, rbuf); 2786 break; 2787 default: 2788 if (fin_set && 2789 (!irdma_check_seq(cm_node, (struct tcphdr *)rbuf->tcph))) 2790 irdma_handle_fin_pkt(cm_node); 2791 break; 2792 } 2793 } 2794 2795 /** 2796 * irdma_make_listen_node - create a listen node with params 2797 * @cm_core: cm's core 2798 * @iwdev: iwarp device structure 2799 * @cm_info: quad info for connection 2800 */ 2801 static struct irdma_cm_listener * 2802 irdma_make_listen_node(struct irdma_cm_core *cm_core, 2803 struct irdma_device *iwdev, 2804 struct irdma_cm_info *cm_info) 2805 { 2806 struct irdma_cm_listener *listener; 2807 unsigned long flags; 2808 2809 /* cannot have multiple matching listeners */ 2810 listener = irdma_find_listener(cm_core, cm_info->loc_addr, cm_info->ipv4, 2811 cm_info->loc_port, cm_info->vlan_id, 2812 IRDMA_CM_LISTENER_EITHER_STATE); 2813 if (listener && 2814 listener->listener_state == IRDMA_CM_LISTENER_ACTIVE_STATE) { 2815 atomic_dec(&listener->refcnt); 2816 return NULL; 2817 } 2818 2819 if (!listener) { 2820 /* 2821 * create a CM listen node 1/2 node to compare incoming traffic to 2822 */ 2823 listener = kzalloc(sizeof(*listener), GFP_KERNEL); 2824 if (!listener) 2825 return NULL; 2826 cm_core->stats_listen_nodes_created++; 2827 memcpy(listener->loc_addr, cm_info->loc_addr, 2828 sizeof(listener->loc_addr)); 2829 listener->loc_port = cm_info->loc_port; 2830 2831 INIT_LIST_HEAD(&listener->child_listen_list); 2832 2833 atomic_set(&listener->refcnt, 1); 2834 } else { 2835 listener->reused_node = 1; 2836 } 2837 2838 listener->cm_id = cm_info->cm_id; 2839 listener->ipv4 = cm_info->ipv4; 2840 listener->vlan_id = cm_info->vlan_id; 2841 atomic_set(&listener->pend_accepts_cnt, 0); 2842 listener->cm_core = cm_core; 2843 listener->iwdev = iwdev; 2844 2845 listener->backlog = cm_info->backlog; 2846 listener->listener_state = IRDMA_CM_LISTENER_ACTIVE_STATE; 2847 2848 if (!listener->reused_node) { 2849 spin_lock_irqsave(&cm_core->listen_list_lock, flags); 2850 list_add(&listener->list, &cm_core->listen_list); 2851 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); 2852 } 2853 2854 return listener; 2855 } 2856 2857 /** 2858 * irdma_create_cm_node - make a connection node with params 2859 * @cm_core: cm's core 2860 * @iwdev: iwarp device structure 2861 * @conn_param: connection parameters 2862 * @cm_info: quad info for connection 2863 * @caller_cm_node: pointer to cm_node structure to return 2864 */ 2865 static int 2866 irdma_create_cm_node(struct irdma_cm_core *cm_core, 2867 struct irdma_device *iwdev, 2868 struct iw_cm_conn_param *conn_param, 2869 struct irdma_cm_info *cm_info, 2870 struct irdma_cm_node **caller_cm_node) 2871 { 2872 struct irdma_cm_node *cm_node; 2873 u16 private_data_len = conn_param->private_data_len; 2874 const void *private_data = conn_param->private_data; 2875 2876 /* create a CM connection node */ 2877 cm_node = irdma_make_cm_node(cm_core, iwdev, cm_info, NULL); 2878 if (!cm_node) 2879 return -ENOMEM; 2880 2881 /* set our node side to client (active) side */ 2882 cm_node->tcp_cntxt.client = 1; 2883 cm_node->tcp_cntxt.rcv_wscale = IRDMA_CM_DEFAULT_RCV_WND_SCALE; 2884 2885 irdma_record_ird_ord(cm_node, conn_param->ird, conn_param->ord); 2886 2887 cm_node->pdata.size = private_data_len; 2888 cm_node->pdata.addr = cm_node->pdata_buf; 2889 2890 memcpy(cm_node->pdata_buf, private_data, private_data_len); 2891 *caller_cm_node = cm_node; 2892 2893 return 0; 2894 } 2895 2896 /** 2897 * irdma_cm_reject - reject and teardown a connection 2898 * @cm_node: connection's node 2899 * @pdata: ptr to private data for reject 2900 * @plen: size of private data 2901 */ 2902 static int 2903 irdma_cm_reject(struct irdma_cm_node *cm_node, const void *pdata, 2904 u8 plen) 2905 { 2906 int ret; 2907 int passive_state; 2908 2909 if (cm_node->tcp_cntxt.client) 2910 return 0; 2911 2912 irdma_cleanup_retrans_entry(cm_node); 2913 2914 passive_state = atomic_add_return(1, &cm_node->passive_state); 2915 if (passive_state == IRDMA_SEND_RESET_EVENT) { 2916 cm_node->state = IRDMA_CM_STATE_CLOSED; 2917 irdma_rem_ref_cm_node(cm_node); 2918 return 0; 2919 } 2920 2921 if (cm_node->state == IRDMA_CM_STATE_LISTENER_DESTROYED) { 2922 irdma_rem_ref_cm_node(cm_node); 2923 return 0; 2924 } 2925 2926 ret = irdma_send_mpa_reject(cm_node, pdata, plen); 2927 if (!ret) 2928 return 0; 2929 2930 cm_node->state = IRDMA_CM_STATE_CLOSED; 2931 if (irdma_send_reset(cm_node)) 2932 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2933 "send reset failed\n"); 2934 2935 return ret; 2936 } 2937 2938 /** 2939 * irdma_cm_close - close of cm connection 2940 * @cm_node: connection's node 2941 */ 2942 static int 2943 irdma_cm_close(struct irdma_cm_node *cm_node) 2944 { 2945 switch (cm_node->state) { 2946 case IRDMA_CM_STATE_SYN_RCVD: 2947 case IRDMA_CM_STATE_SYN_SENT: 2948 case IRDMA_CM_STATE_ONE_SIDE_ESTABLISHED: 2949 case IRDMA_CM_STATE_ESTABLISHED: 2950 case IRDMA_CM_STATE_ACCEPTING: 2951 case IRDMA_CM_STATE_MPAREQ_SENT: 2952 case IRDMA_CM_STATE_MPAREQ_RCVD: 2953 irdma_cleanup_retrans_entry(cm_node); 2954 irdma_send_reset(cm_node); 2955 break; 2956 case IRDMA_CM_STATE_CLOSE_WAIT: 2957 cm_node->state = IRDMA_CM_STATE_LAST_ACK; 2958 irdma_send_fin(cm_node); 2959 break; 2960 case IRDMA_CM_STATE_FIN_WAIT1: 2961 case IRDMA_CM_STATE_FIN_WAIT2: 2962 case IRDMA_CM_STATE_LAST_ACK: 2963 case IRDMA_CM_STATE_TIME_WAIT: 2964 case IRDMA_CM_STATE_CLOSING: 2965 return -EINVAL; 2966 case IRDMA_CM_STATE_LISTENING: 2967 irdma_cleanup_retrans_entry(cm_node); 2968 irdma_send_reset(cm_node); 2969 break; 2970 case IRDMA_CM_STATE_MPAREJ_RCVD: 2971 case IRDMA_CM_STATE_UNKNOWN: 2972 case IRDMA_CM_STATE_INITED: 2973 case IRDMA_CM_STATE_CLOSED: 2974 case IRDMA_CM_STATE_LISTENER_DESTROYED: 2975 irdma_rem_ref_cm_node(cm_node); 2976 break; 2977 case IRDMA_CM_STATE_OFFLOADED: 2978 if (cm_node->send_entry) 2979 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2980 "CM send_entry in OFFLOADED state\n"); 2981 irdma_rem_ref_cm_node(cm_node); 2982 break; 2983 } 2984 2985 return 0; 2986 } 2987 2988 /** 2989 * irdma_receive_ilq - recv an ETHERNET packet, and process it 2990 * through CM 2991 * @vsi: VSI structure of dev 2992 * @rbuf: receive buffer 2993 */ 2994 void 2995 irdma_receive_ilq(struct irdma_sc_vsi *vsi, struct irdma_puda_buf *rbuf) 2996 { 2997 struct irdma_cm_node *cm_node; 2998 struct irdma_cm_listener *listener; 2999 struct ip *iph; 3000 struct ip6_hdr *ip6h; 3001 struct tcphdr *tcph; 3002 struct irdma_cm_info cm_info = {0}; 3003 struct irdma_device *iwdev = vsi->back_vsi; 3004 struct irdma_cm_core *cm_core = &iwdev->cm_core; 3005 struct ether_vlan_header *ethh; 3006 u16 vtag; 3007 3008 /* if vlan, then maclen = 18 else 14 */ 3009 iph = (struct ip *)rbuf->iph; 3010 irdma_debug_buf(vsi->dev, IRDMA_DEBUG_ILQ, "RECEIVE ILQ BUFFER", 3011 rbuf->mem.va, rbuf->totallen); 3012 if (iwdev->rf->sc_dev.hw_attrs.uk_attrs.hw_rev >= IRDMA_GEN_2) { 3013 if (rbuf->vlan_valid) { 3014 vtag = rbuf->vlan_id; 3015 cm_info.user_pri = (vtag & EVL_PRI_MASK) >> 3016 VLAN_PRIO_SHIFT; 3017 cm_info.vlan_id = vtag & EVL_VLID_MASK; 3018 } else { 3019 cm_info.vlan_id = 0xFFFF; 3020 } 3021 } else { 3022 ethh = rbuf->mem.va; 3023 3024 if (ethh->evl_proto == htons(ETH_P_8021Q)) { 3025 vtag = ntohs(ethh->evl_tag); 3026 cm_info.user_pri = (vtag & EVL_PRI_MASK) >> 3027 VLAN_PRIO_SHIFT; 3028 cm_info.vlan_id = vtag & EVL_VLID_MASK; 3029 irdma_debug(&cm_core->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3030 "vlan_id=%d\n", cm_info.vlan_id); 3031 } else { 3032 cm_info.vlan_id = 0xFFFF; 3033 } 3034 } 3035 tcph = (struct tcphdr *)rbuf->tcph; 3036 3037 if (rbuf->ipv4) { 3038 cm_info.loc_addr[0] = ntohl(iph->ip_dst.s_addr); 3039 cm_info.rem_addr[0] = ntohl(iph->ip_src.s_addr); 3040 cm_info.ipv4 = true; 3041 cm_info.tos = iph->ip_tos; 3042 } else { 3043 ip6h = (struct ip6_hdr *)rbuf->iph; 3044 irdma_copy_ip_ntohl(cm_info.loc_addr, 3045 ip6h->ip6_dst.__u6_addr.__u6_addr32); 3046 irdma_copy_ip_ntohl(cm_info.rem_addr, 3047 ip6h->ip6_src.__u6_addr.__u6_addr32); 3048 cm_info.ipv4 = false; 3049 cm_info.tos = (ip6h->ip6_vfc << 4) | ip6h->ip6_flow; 3050 } 3051 cm_info.loc_port = ntohs(tcph->th_dport); 3052 cm_info.rem_port = ntohs(tcph->th_sport); 3053 cm_node = irdma_find_node(cm_core, cm_info.rem_port, cm_info.rem_addr, 3054 cm_info.loc_port, cm_info.loc_addr, cm_info.vlan_id); 3055 3056 if (!cm_node) { 3057 /* 3058 * Only type of packet accepted are for the PASSIVE open (syn only) 3059 */ 3060 if (!(tcph->th_flags & TH_SYN) || tcph->th_flags & TH_ACK) 3061 return; 3062 3063 listener = irdma_find_listener(cm_core, 3064 cm_info.loc_addr, 3065 cm_info.ipv4, 3066 cm_info.loc_port, 3067 cm_info.vlan_id, 3068 IRDMA_CM_LISTENER_ACTIVE_STATE); 3069 if (!listener) { 3070 cm_info.cm_id = NULL; 3071 irdma_debug(&cm_core->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3072 "no listener found\n"); 3073 return; 3074 } 3075 3076 cm_info.cm_id = listener->cm_id; 3077 cm_node = irdma_make_cm_node(cm_core, iwdev, &cm_info, 3078 listener); 3079 if (!cm_node) { 3080 irdma_debug(&cm_core->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3081 "allocate node failed\n"); 3082 atomic_dec(&listener->refcnt); 3083 return; 3084 } 3085 3086 if (!(tcph->th_flags & (TH_RST | TH_FIN))) { 3087 cm_node->state = IRDMA_CM_STATE_LISTENING; 3088 } else { 3089 irdma_rem_ref_cm_node(cm_node); 3090 return; 3091 } 3092 3093 atomic_inc(&cm_node->refcnt); 3094 } else if (cm_node->state == IRDMA_CM_STATE_OFFLOADED) { 3095 irdma_rem_ref_cm_node(cm_node); 3096 return; 3097 } 3098 3099 irdma_process_pkt(cm_node, rbuf); 3100 irdma_rem_ref_cm_node(cm_node); 3101 } 3102 3103 static int 3104 irdma_add_qh(struct irdma_cm_node *cm_node, bool active) 3105 { 3106 if (!active) 3107 irdma_add_conn_est_qh(cm_node); 3108 return 0; 3109 } 3110 3111 static void 3112 irdma_cm_free_ah_nop(struct irdma_cm_node *cm_node) 3113 { 3114 } 3115 3116 /** 3117 * irdma_setup_cm_core - setup top level instance of a cm core 3118 * @iwdev: iwarp device structure 3119 * @rdma_ver: HW version 3120 */ 3121 int 3122 irdma_setup_cm_core(struct irdma_device *iwdev, u8 rdma_ver) 3123 { 3124 struct irdma_cm_core *cm_core = &iwdev->cm_core; 3125 3126 cm_core->iwdev = iwdev; 3127 cm_core->dev = &iwdev->rf->sc_dev; 3128 3129 /* Handles CM event work items send to Iwarp core */ 3130 cm_core->event_wq = alloc_ordered_workqueue("iwarp-event-wq", 0); 3131 if (!cm_core->event_wq) 3132 return -ENOMEM; 3133 3134 INIT_LIST_HEAD(&cm_core->listen_list); 3135 3136 timer_setup(&cm_core->tcp_timer, irdma_cm_timer_tick, 0); 3137 3138 spin_lock_init(&cm_core->ht_lock); 3139 spin_lock_init(&cm_core->listen_list_lock); 3140 spin_lock_init(&cm_core->apbvt_lock); 3141 switch (rdma_ver) { 3142 case IRDMA_GEN_1: 3143 cm_core->form_cm_frame = irdma_form_uda_cm_frame; 3144 cm_core->cm_create_ah = irdma_add_qh; 3145 cm_core->cm_free_ah = irdma_cm_free_ah_nop; 3146 break; 3147 case IRDMA_GEN_2: 3148 default: 3149 cm_core->form_cm_frame = irdma_form_ah_cm_frame; 3150 cm_core->cm_create_ah = irdma_cm_create_ah; 3151 cm_core->cm_free_ah = irdma_cm_free_ah; 3152 } 3153 3154 return 0; 3155 } 3156 3157 /** 3158 * irdma_cleanup_cm_core - deallocate a top level instance of a 3159 * cm core 3160 * @cm_core: cm's core 3161 */ 3162 void 3163 irdma_cleanup_cm_core(struct irdma_cm_core *cm_core) 3164 { 3165 if (!cm_core) 3166 return; 3167 3168 del_timer_sync(&cm_core->tcp_timer); 3169 3170 destroy_workqueue(cm_core->event_wq); 3171 cm_core->dev->ws_reset(&cm_core->iwdev->vsi); 3172 } 3173 3174 /** 3175 * irdma_init_tcp_ctx - setup qp context 3176 * @cm_node: connection's node 3177 * @tcp_info: offload info for tcp 3178 * @iwqp: associate qp for the connection 3179 */ 3180 static void 3181 irdma_init_tcp_ctx(struct irdma_cm_node *cm_node, 3182 struct irdma_tcp_offload_info *tcp_info, 3183 struct irdma_qp *iwqp) 3184 { 3185 tcp_info->ipv4 = cm_node->ipv4; 3186 tcp_info->drop_ooo_seg = !iwqp->iwdev->iw_ooo; 3187 tcp_info->wscale = true; 3188 tcp_info->ignore_tcp_opt = true; 3189 tcp_info->ignore_tcp_uns_opt = true; 3190 tcp_info->no_nagle = false; 3191 3192 tcp_info->ttl = IRDMA_DEFAULT_TTL; 3193 tcp_info->rtt_var = IRDMA_DEFAULT_RTT_VAR; 3194 tcp_info->ss_thresh = IRDMA_DEFAULT_SS_THRESH; 3195 tcp_info->rexmit_thresh = IRDMA_DEFAULT_REXMIT_THRESH; 3196 3197 tcp_info->tcp_state = IRDMA_TCP_STATE_ESTABLISHED; 3198 tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale; 3199 tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale; 3200 3201 tcp_info->snd_nxt = cm_node->tcp_cntxt.loc_seq_num; 3202 tcp_info->snd_wnd = cm_node->tcp_cntxt.snd_wnd; 3203 tcp_info->rcv_nxt = cm_node->tcp_cntxt.rcv_nxt; 3204 tcp_info->snd_max = cm_node->tcp_cntxt.loc_seq_num; 3205 3206 tcp_info->snd_una = cm_node->tcp_cntxt.loc_seq_num; 3207 tcp_info->cwnd = 2 * cm_node->tcp_cntxt.mss; 3208 tcp_info->snd_wl1 = cm_node->tcp_cntxt.rcv_nxt; 3209 tcp_info->snd_wl2 = cm_node->tcp_cntxt.loc_seq_num; 3210 tcp_info->max_snd_window = cm_node->tcp_cntxt.max_snd_wnd; 3211 tcp_info->rcv_wnd = cm_node->tcp_cntxt.rcv_wnd 3212 << cm_node->tcp_cntxt.rcv_wscale; 3213 3214 tcp_info->flow_label = 0; 3215 tcp_info->snd_mss = (u32)cm_node->tcp_cntxt.mss; 3216 tcp_info->tos = cm_node->tos; 3217 if (cm_node->vlan_id < VLAN_N_VID) { 3218 tcp_info->insert_vlan_tag = true; 3219 tcp_info->vlan_tag = cm_node->vlan_id; 3220 tcp_info->vlan_tag |= cm_node->user_pri << VLAN_PRIO_SHIFT; 3221 } 3222 tcp_info->src_port = cm_node->loc_port; 3223 tcp_info->dst_port = cm_node->rem_port; 3224 tcp_info->arp_idx = (u16)irdma_arp_table(iwqp->iwdev->rf, 3225 cm_node->rem_addr, NULL, 3226 IRDMA_ARP_RESOLVE); 3227 if (cm_node->ipv4) { 3228 tcp_info->dest_ip_addr[3] = cm_node->rem_addr[0]; 3229 tcp_info->local_ipaddr[3] = cm_node->loc_addr[0]; 3230 } else { 3231 memcpy(tcp_info->dest_ip_addr, cm_node->rem_addr, 3232 sizeof(tcp_info->dest_ip_addr)); 3233 memcpy(tcp_info->local_ipaddr, cm_node->loc_addr, 3234 sizeof(tcp_info->local_ipaddr)); 3235 } 3236 } 3237 3238 /** 3239 * irdma_cm_init_tsa_conn - setup qp for RTS 3240 * @iwqp: associate qp for the connection 3241 * @cm_node: connection's node 3242 */ 3243 static void 3244 irdma_cm_init_tsa_conn(struct irdma_qp *iwqp, 3245 struct irdma_cm_node *cm_node) 3246 { 3247 struct irdma_iwarp_offload_info *iwarp_info; 3248 struct irdma_qp_host_ctx_info *ctx_info; 3249 3250 iwarp_info = &iwqp->iwarp_info; 3251 ctx_info = &iwqp->ctx_info; 3252 3253 ctx_info->tcp_info = &iwqp->tcp_info; 3254 ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id; 3255 ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id; 3256 3257 iwarp_info->ord_size = cm_node->ord_size; 3258 iwarp_info->ird_size = cm_node->ird_size; 3259 iwarp_info->rd_en = true; 3260 iwarp_info->rdmap_ver = 1; 3261 iwarp_info->ddp_ver = 1; 3262 iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id; 3263 3264 ctx_info->tcp_info_valid = true; 3265 ctx_info->iwarp_info_valid = true; 3266 ctx_info->user_pri = cm_node->user_pri; 3267 3268 irdma_init_tcp_ctx(cm_node, &iwqp->tcp_info, iwqp); 3269 if (cm_node->snd_mark_en) { 3270 iwarp_info->snd_mark_en = true; 3271 iwarp_info->snd_mark_offset = (iwqp->tcp_info.snd_nxt & SNDMARKER_SEQNMASK) + 3272 cm_node->lsmm_size; 3273 } 3274 3275 cm_node->state = IRDMA_CM_STATE_OFFLOADED; 3276 iwqp->tcp_info.tcp_state = IRDMA_TCP_STATE_ESTABLISHED; 3277 iwqp->tcp_info.src_mac_addr_idx = iwqp->iwdev->mac_ip_table_idx; 3278 3279 if (cm_node->rcv_mark_en) { 3280 iwarp_info->rcv_mark_en = true; 3281 iwarp_info->align_hdrs = true; 3282 } 3283 3284 irdma_sc_qp_setctx(&iwqp->sc_qp, iwqp->host_ctx.va, ctx_info); 3285 3286 /* once tcp_info is set, no need to do it again */ 3287 ctx_info->tcp_info_valid = false; 3288 ctx_info->iwarp_info_valid = false; 3289 } 3290 3291 /** 3292 * irdma_cm_disconn - when a connection is being closed 3293 * @iwqp: associated qp for the connection 3294 */ 3295 void 3296 irdma_cm_disconn(struct irdma_qp *iwqp) 3297 { 3298 struct irdma_device *iwdev = iwqp->iwdev; 3299 struct disconn_work *work; 3300 unsigned long flags; 3301 3302 work = kzalloc(sizeof(*work), GFP_ATOMIC); 3303 if (!work) 3304 return; 3305 3306 spin_lock_irqsave(&iwdev->rf->qptable_lock, flags); 3307 if (!iwdev->rf->qp_table[iwqp->ibqp.qp_num]) { 3308 spin_unlock_irqrestore(&iwdev->rf->qptable_lock, flags); 3309 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3310 "qp_id %d is already freed\n", iwqp->ibqp.qp_num); 3311 kfree(work); 3312 return; 3313 } 3314 irdma_qp_add_ref(&iwqp->ibqp); 3315 spin_unlock_irqrestore(&iwdev->rf->qptable_lock, flags); 3316 3317 work->iwqp = iwqp; 3318 INIT_WORK(&work->work, irdma_disconnect_worker); 3319 queue_work(iwdev->cleanup_wq, &work->work); 3320 } 3321 3322 /** 3323 * irdma_qp_disconnect - free qp and close cm 3324 * @iwqp: associate qp for the connection 3325 */ 3326 static void 3327 irdma_qp_disconnect(struct irdma_qp *iwqp) 3328 { 3329 struct irdma_device *iwdev = iwqp->iwdev; 3330 3331 iwqp->active_conn = 0; 3332 /* close the CM node down if it is still active */ 3333 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, "Call close API\n"); 3334 irdma_cm_close(iwqp->cm_node); 3335 } 3336 3337 /** 3338 * irdma_cm_disconn_true - called by worker thread to disconnect qp 3339 * @iwqp: associate qp for the connection 3340 */ 3341 static void 3342 irdma_cm_disconn_true(struct irdma_qp *iwqp) 3343 { 3344 struct iw_cm_id *cm_id; 3345 struct irdma_device *iwdev; 3346 struct irdma_sc_qp *qp = &iwqp->sc_qp; 3347 u16 last_ae; 3348 u8 original_hw_tcp_state; 3349 u8 original_ibqp_state; 3350 int disconn_status = 0; 3351 int issue_disconn = 0; 3352 int issue_close = 0; 3353 int issue_flush = 0; 3354 unsigned long flags; 3355 int err; 3356 3357 iwdev = iwqp->iwdev; 3358 spin_lock_irqsave(&iwqp->lock, flags); 3359 if (rdma_protocol_roce(&iwdev->ibdev, 1)) { 3360 struct ib_qp_attr attr; 3361 3362 if (iwqp->flush_issued || iwqp->sc_qp.qp_uk.destroy_pending) { 3363 spin_unlock_irqrestore(&iwqp->lock, flags); 3364 return; 3365 } 3366 3367 spin_unlock_irqrestore(&iwqp->lock, flags); 3368 3369 attr.qp_state = IB_QPS_ERR; 3370 irdma_modify_qp_roce(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); 3371 irdma_ib_qp_event(iwqp, qp->event_type); 3372 return; 3373 } 3374 3375 cm_id = iwqp->cm_id; 3376 original_hw_tcp_state = iwqp->hw_tcp_state; 3377 original_ibqp_state = iwqp->ibqp_state; 3378 last_ae = iwqp->last_aeq; 3379 3380 if (qp->term_flags) { 3381 issue_disconn = 1; 3382 issue_close = 1; 3383 iwqp->cm_id = NULL; 3384 irdma_terminate_del_timer(qp); 3385 if (!iwqp->flush_issued) { 3386 iwqp->flush_issued = 1; 3387 issue_flush = 1; 3388 } 3389 } else if ((original_hw_tcp_state == IRDMA_TCP_STATE_CLOSE_WAIT) || 3390 ((original_ibqp_state == IB_QPS_RTS) && 3391 (last_ae == IRDMA_AE_LLP_CONNECTION_RESET))) { 3392 issue_disconn = 1; 3393 if (last_ae == IRDMA_AE_LLP_CONNECTION_RESET) 3394 disconn_status = -ECONNRESET; 3395 } 3396 3397 if (original_hw_tcp_state == IRDMA_TCP_STATE_CLOSED || 3398 original_hw_tcp_state == IRDMA_TCP_STATE_TIME_WAIT || 3399 last_ae == IRDMA_AE_RDMAP_ROE_BAD_LLP_CLOSE || 3400 last_ae == IRDMA_AE_BAD_CLOSE || 3401 last_ae == IRDMA_AE_LLP_CONNECTION_RESET || iwdev->rf->reset || !cm_id) { 3402 issue_close = 1; 3403 iwqp->cm_id = NULL; 3404 qp->term_flags = 0; 3405 if (!iwqp->flush_issued) { 3406 iwqp->flush_issued = 1; 3407 issue_flush = 1; 3408 } 3409 } 3410 3411 spin_unlock_irqrestore(&iwqp->lock, flags); 3412 if (issue_flush && !iwqp->sc_qp.qp_uk.destroy_pending) { 3413 irdma_flush_wqes(iwqp, IRDMA_FLUSH_SQ | IRDMA_FLUSH_RQ | 3414 IRDMA_FLUSH_WAIT); 3415 3416 if (qp->term_flags) 3417 irdma_ib_qp_event(iwqp, qp->event_type); 3418 } 3419 3420 if (!cm_id || !cm_id->event_handler) 3421 return; 3422 3423 spin_lock_irqsave(&iwdev->cm_core.ht_lock, flags); 3424 if (!iwqp->cm_node) { 3425 spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags); 3426 return; 3427 } 3428 atomic_inc(&iwqp->cm_node->refcnt); 3429 3430 spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags); 3431 3432 if (issue_disconn) { 3433 err = irdma_send_cm_event(iwqp->cm_node, cm_id, 3434 IW_CM_EVENT_DISCONNECT, 3435 disconn_status); 3436 if (err) 3437 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3438 "disconnect event failed: - cm_id = %p\n", 3439 cm_id); 3440 } 3441 if (issue_close) { 3442 cm_id->provider_data = iwqp; 3443 err = irdma_send_cm_event(iwqp->cm_node, cm_id, 3444 IW_CM_EVENT_CLOSE, 0); 3445 if (err) 3446 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3447 "close event failed: - cm_id = %p\n", 3448 cm_id); 3449 irdma_qp_disconnect(iwqp); 3450 } 3451 irdma_rem_ref_cm_node(iwqp->cm_node); 3452 } 3453 3454 /** 3455 * irdma_disconnect_worker - worker for connection close 3456 * @work: points or disconn structure 3457 */ 3458 static void 3459 irdma_disconnect_worker(struct work_struct *work) 3460 { 3461 struct disconn_work *dwork = container_of(work, struct disconn_work, work); 3462 struct irdma_qp *iwqp = dwork->iwqp; 3463 3464 kfree(dwork); 3465 irdma_cm_disconn_true(iwqp); 3466 irdma_qp_rem_ref(&iwqp->ibqp); 3467 } 3468 3469 /** 3470 * irdma_free_lsmm_rsrc - free lsmm memory and deregister 3471 * @iwqp: associate qp for the connection 3472 */ 3473 void 3474 irdma_free_lsmm_rsrc(struct irdma_qp *iwqp) 3475 { 3476 struct irdma_device *iwdev; 3477 3478 iwdev = iwqp->iwdev; 3479 3480 if (iwqp->ietf_mem.va) { 3481 if (iwqp->lsmm_mr) 3482 iwdev->ibdev.dereg_mr(iwqp->lsmm_mr, NULL); 3483 irdma_free_dma_mem(iwdev->rf->sc_dev.hw, 3484 &iwqp->ietf_mem); 3485 iwqp->ietf_mem.va = NULL; 3486 } 3487 } 3488 3489 /** 3490 * irdma_accept - registered call for connection to be accepted 3491 * @cm_id: cm information for passive connection 3492 * @conn_param: accpet parameters 3493 */ 3494 int 3495 irdma_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) 3496 { 3497 struct ib_qp *ibqp; 3498 struct irdma_qp *iwqp; 3499 struct irdma_device *iwdev; 3500 struct irdma_sc_dev *dev; 3501 struct irdma_cm_node *cm_node; 3502 struct ib_qp_attr attr = {0}; 3503 int passive_state; 3504 struct ib_mr *ibmr; 3505 struct irdma_pd *iwpd; 3506 u16 buf_len = 0; 3507 struct irdma_kmem_info accept; 3508 u64 tagged_offset; 3509 int wait_ret; 3510 int ret = 0; 3511 3512 ibqp = irdma_get_qp(cm_id->device, conn_param->qpn); 3513 if (!ibqp) 3514 return -EINVAL; 3515 3516 iwqp = to_iwqp(ibqp); 3517 iwdev = iwqp->iwdev; 3518 dev = &iwdev->rf->sc_dev; 3519 cm_node = cm_id->provider_data; 3520 3521 if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) { 3522 cm_node->ipv4 = true; 3523 cm_node->vlan_id = irdma_get_vlan_ipv4(cm_node->loc_addr); 3524 } else { 3525 cm_node->ipv4 = false; 3526 irdma_netdev_vlan_ipv6(cm_node->loc_addr, &cm_node->vlan_id, 3527 NULL); 3528 } 3529 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, "Accept vlan_id=%d\n", 3530 cm_node->vlan_id); 3531 3532 if (cm_node->state == IRDMA_CM_STATE_LISTENER_DESTROYED) { 3533 ret = -EINVAL; 3534 goto error; 3535 } 3536 3537 passive_state = atomic_add_return(1, &cm_node->passive_state); 3538 if (passive_state == IRDMA_SEND_RESET_EVENT) { 3539 ret = -ECONNRESET; 3540 goto error; 3541 } 3542 3543 buf_len = conn_param->private_data_len + IRDMA_MAX_IETF_SIZE; 3544 iwqp->ietf_mem.size = buf_len; 3545 iwqp->ietf_mem.va = irdma_allocate_dma_mem(dev->hw, &iwqp->ietf_mem, 3546 iwqp->ietf_mem.size, 1); 3547 if (!iwqp->ietf_mem.va) { 3548 ret = -ENOMEM; 3549 goto error; 3550 } 3551 3552 cm_node->pdata.size = conn_param->private_data_len; 3553 accept.addr = iwqp->ietf_mem.va; 3554 accept.size = irdma_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY); 3555 memcpy((u8 *)accept.addr + accept.size, conn_param->private_data, 3556 conn_param->private_data_len); 3557 3558 if (cm_node->dev->ws_add(iwqp->sc_qp.vsi, cm_node->user_pri)) { 3559 ret = -ENOMEM; 3560 goto error; 3561 } 3562 iwqp->sc_qp.user_pri = cm_node->user_pri; 3563 irdma_qp_add_qos(&iwqp->sc_qp); 3564 if (cm_node->dev->hw_attrs.uk_attrs.hw_rev == IRDMA_GEN_2) 3565 iwdev->rf->check_fc(&iwdev->vsi, &iwqp->sc_qp); 3566 /* setup our first outgoing iWarp send WQE (the IETF frame response) */ 3567 iwpd = iwqp->iwpd; 3568 tagged_offset = (uintptr_t)iwqp->ietf_mem.va; 3569 ibmr = irdma_reg_phys_mr(&iwpd->ibpd, iwqp->ietf_mem.pa, buf_len, 3570 IB_ACCESS_LOCAL_WRITE, &tagged_offset); 3571 if (IS_ERR(ibmr)) { 3572 ret = -ENOMEM; 3573 goto error; 3574 } 3575 3576 ibmr->pd = &iwpd->ibpd; 3577 ibmr->device = iwpd->ibpd.device; 3578 iwqp->lsmm_mr = ibmr; 3579 if (iwqp->page) 3580 iwqp->sc_qp.qp_uk.sq_base = kmap_local_page(iwqp->page); 3581 3582 cm_node->lsmm_size = accept.size + conn_param->private_data_len; 3583 irdma_sc_send_lsmm(&iwqp->sc_qp, iwqp->ietf_mem.va, cm_node->lsmm_size, 3584 ibmr->lkey); 3585 3586 if (iwqp->page) 3587 kunmap_local(iwqp->sc_qp.qp_uk.sq_base); 3588 3589 iwqp->cm_id = cm_id; 3590 cm_node->cm_id = cm_id; 3591 3592 cm_id->provider_data = iwqp; 3593 iwqp->active_conn = 0; 3594 iwqp->cm_node = cm_node; 3595 cm_node->iwqp = iwqp; 3596 irdma_cm_init_tsa_conn(iwqp, cm_node); 3597 irdma_qp_add_ref(&iwqp->ibqp); 3598 cm_id->add_ref(cm_id); 3599 3600 attr.qp_state = IB_QPS_RTS; 3601 cm_node->qhash_set = false; 3602 cm_node->cm_core->cm_free_ah(cm_node); 3603 3604 irdma_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); 3605 if (dev->hw_attrs.uk_attrs.feature_flags & IRDMA_FEATURE_RTS_AE) { 3606 wait_ret = wait_event_interruptible_timeout(iwqp->waitq, 3607 iwqp->rts_ae_rcvd, 3608 IRDMA_MAX_TIMEOUT); 3609 if (!wait_ret) { 3610 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3611 "Slow Connection: cm_node=%p, loc_port=%d, rem_port=%d, cm_id=%p\n", 3612 cm_node, cm_node->loc_port, 3613 cm_node->rem_port, cm_node->cm_id); 3614 ret = -ECONNRESET; 3615 goto error; 3616 } 3617 } 3618 3619 irdma_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0); 3620 cm_node->accelerated = true; 3621 complete(&cm_node->establish_comp); 3622 3623 if (cm_node->accept_pend) { 3624 atomic_dec(&cm_node->listener->pend_accepts_cnt); 3625 cm_node->accept_pend = 0; 3626 } 3627 3628 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3629 "rem_port=0x%04x, loc_port=0x%04x rem_addr=%x loc_addr=%x cm_node=%p cm_id=%p qp_id=%d\n\n", 3630 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr[0], 3631 cm_node->loc_addr[0], cm_node, cm_id, ibqp->qp_num); 3632 cm_node->cm_core->stats_accepts++; 3633 3634 return 0; 3635 error: 3636 irdma_free_lsmm_rsrc(iwqp); 3637 irdma_rem_ref_cm_node(cm_node); 3638 3639 return ret; 3640 } 3641 3642 /** 3643 * irdma_reject - registered call for connection to be rejected 3644 * @cm_id: cm information for passive connection 3645 * @pdata: private data to be sent 3646 * @pdata_len: private data length 3647 */ 3648 int 3649 irdma_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len) 3650 { 3651 struct irdma_device *iwdev; 3652 struct irdma_cm_node *cm_node; 3653 3654 cm_node = cm_id->provider_data; 3655 cm_node->pdata.size = pdata_len; 3656 3657 iwdev = to_iwdev(cm_id->device); 3658 if (!iwdev) 3659 return -EINVAL; 3660 3661 cm_node->cm_core->stats_rejects++; 3662 3663 if (pdata_len + sizeof(struct ietf_mpa_v2) > IRDMA_MAX_CM_BUF) 3664 return -EINVAL; 3665 3666 return irdma_cm_reject(cm_node, pdata, pdata_len); 3667 } 3668 3669 /** 3670 * irdma_connect - registered call for connection to be established 3671 * @cm_id: cm information for passive connection 3672 * @conn_param: Information about the connection 3673 */ 3674 int 3675 irdma_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) 3676 { 3677 struct ib_qp *ibqp; 3678 struct irdma_qp *iwqp; 3679 struct irdma_device *iwdev; 3680 struct irdma_cm_node *cm_node; 3681 struct irdma_cm_info cm_info; 3682 struct sockaddr_in *laddr; 3683 struct sockaddr_in *raddr; 3684 struct sockaddr_in6 *laddr6; 3685 struct sockaddr_in6 *raddr6; 3686 int ret = 0; 3687 3688 ibqp = irdma_get_qp(cm_id->device, conn_param->qpn); 3689 if (!ibqp) 3690 return -EINVAL; 3691 iwqp = to_iwqp(ibqp); 3692 if (!iwqp) 3693 return -EINVAL; 3694 iwdev = iwqp->iwdev; 3695 if (!iwdev) 3696 return -EINVAL; 3697 3698 laddr = (struct sockaddr_in *)&cm_id->m_local_addr; 3699 raddr = (struct sockaddr_in *)&cm_id->m_remote_addr; 3700 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr; 3701 raddr6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr; 3702 3703 if (!(laddr->sin_port) || !(raddr->sin_port)) 3704 return -EINVAL; 3705 3706 iwqp->active_conn = 1; 3707 iwqp->cm_id = NULL; 3708 cm_id->provider_data = iwqp; 3709 3710 /* set up the connection params for the node */ 3711 if (cm_id->remote_addr.ss_family == AF_INET) { 3712 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV4) 3713 return -EINVAL; 3714 3715 cm_info.ipv4 = true; 3716 memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr)); 3717 memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr)); 3718 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr); 3719 cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr); 3720 cm_info.loc_port = ntohs(laddr->sin_port); 3721 cm_info.rem_port = ntohs(raddr->sin_port); 3722 cm_info.vlan_id = irdma_get_vlan_ipv4(cm_info.loc_addr); 3723 } else { 3724 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV6) 3725 return -EINVAL; 3726 3727 cm_info.ipv4 = false; 3728 irdma_copy_ip_ntohl(cm_info.loc_addr, 3729 laddr6->sin6_addr.__u6_addr.__u6_addr32); 3730 irdma_copy_ip_ntohl(cm_info.rem_addr, 3731 raddr6->sin6_addr.__u6_addr.__u6_addr32); 3732 cm_info.loc_port = ntohs(laddr6->sin6_port); 3733 cm_info.rem_port = ntohs(raddr6->sin6_port); 3734 irdma_netdev_vlan_ipv6(cm_info.loc_addr, &cm_info.vlan_id, NULL); 3735 } 3736 cm_info.cm_id = cm_id; 3737 cm_info.qh_qpid = iwdev->vsi.ilq->qp_id; 3738 cm_info.tos = cm_id->tos; 3739 if (iwdev->vsi.dscp_mode) { 3740 cm_info.user_pri = 3741 iwqp->sc_qp.vsi->dscp_map[irdma_tos2dscp(cm_info.tos)]; 3742 } else { 3743 cm_info.user_pri = rt_tos2priority(cm_id->tos); 3744 cm_info.user_pri = 3745 irdma_iw_get_vlan_prio(cm_info.loc_addr, 3746 cm_info.user_pri, 3747 cm_info.ipv4); 3748 } 3749 3750 if (iwqp->sc_qp.dev->ws_add(iwqp->sc_qp.vsi, cm_info.user_pri)) 3751 return -ENOMEM; 3752 iwqp->sc_qp.user_pri = cm_info.user_pri; 3753 irdma_qp_add_qos(&iwqp->sc_qp); 3754 if (iwdev->rf->sc_dev.hw_attrs.uk_attrs.hw_rev == IRDMA_GEN_2) 3755 iwdev->rf->check_fc(&iwdev->vsi, &iwqp->sc_qp); 3756 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_DCB, "TOS:[%d] UP:[%d]\n", 3757 cm_id->tos, cm_info.user_pri); 3758 3759 ret = irdma_create_cm_node(&iwdev->cm_core, iwdev, conn_param, &cm_info, 3760 &cm_node); 3761 if (ret) 3762 return ret; 3763 ret = cm_node->cm_core->cm_create_ah(cm_node, true); 3764 if (ret) 3765 goto err; 3766 if (irdma_manage_qhash(iwdev, &cm_info, 3767 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 3768 IRDMA_QHASH_MANAGE_TYPE_ADD, NULL, true)) { 3769 ret = -EINVAL; 3770 goto err; 3771 } 3772 cm_node->qhash_set = true; 3773 3774 cm_node->apbvt_entry = irdma_add_apbvt(iwdev, cm_info.loc_port); 3775 if (!cm_node->apbvt_entry) { 3776 ret = -EINVAL; 3777 goto err; 3778 } 3779 3780 cm_node->apbvt_set = true; 3781 iwqp->cm_node = cm_node; 3782 cm_node->iwqp = iwqp; 3783 iwqp->cm_id = cm_id; 3784 irdma_qp_add_ref(&iwqp->ibqp); 3785 cm_id->add_ref(cm_id); 3786 3787 if (cm_node->state != IRDMA_CM_STATE_OFFLOADED) { 3788 cm_node->state = IRDMA_CM_STATE_SYN_SENT; 3789 ret = irdma_send_syn(cm_node, 0); 3790 if (ret) 3791 goto err; 3792 } 3793 3794 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3795 "rem_port=0x%04x, loc_port=0x%04x rem_addr=%x loc_addr=%x cm_node=%p cm_id=%p qp_id = %d\n\n", 3796 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr[0], 3797 cm_node->loc_addr[0], cm_node, cm_id, ibqp->qp_num); 3798 3799 return 0; 3800 3801 err: 3802 if (cm_info.ipv4) 3803 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3804 "connect() FAILED: dest addr=%x", 3805 cm_info.rem_addr[0]); 3806 else 3807 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3808 "connect() FAILED: dest addr=%x:%x:%x:%x", 3809 IRDMA_PRINT_IP6(cm_info.rem_addr)); 3810 irdma_rem_ref_cm_node(cm_node); 3811 iwdev->cm_core.stats_connect_errs++; 3812 3813 return ret; 3814 } 3815 3816 /** 3817 * irdma_create_listen - registered call creating listener 3818 * @cm_id: cm information for passive connection 3819 * @backlog: to max accept pending count 3820 */ 3821 int 3822 irdma_create_listen(struct iw_cm_id *cm_id, int backlog) 3823 { 3824 struct irdma_device *iwdev; 3825 struct irdma_cm_listener *cm_listen_node; 3826 struct irdma_cm_info cm_info = {0}; 3827 struct sockaddr_in *laddr; 3828 struct sockaddr_in6 *laddr6; 3829 bool wildcard = false; 3830 int err; 3831 3832 iwdev = to_iwdev(cm_id->device); 3833 if (!iwdev) 3834 return -EINVAL; 3835 3836 laddr = (struct sockaddr_in *)&cm_id->m_local_addr; 3837 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr; 3838 cm_info.qh_qpid = iwdev->vsi.ilq->qp_id; 3839 3840 if (laddr->sin_family == AF_INET) { 3841 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV4) 3842 return -EINVAL; 3843 3844 cm_info.ipv4 = true; 3845 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr); 3846 cm_info.loc_port = ntohs(laddr->sin_port); 3847 3848 if (laddr->sin_addr.s_addr != htonl(INADDR_ANY)) { 3849 cm_info.vlan_id = irdma_get_vlan_ipv4(cm_info.loc_addr); 3850 } else { 3851 cm_info.vlan_id = 0xFFFF; 3852 wildcard = true; 3853 } 3854 } else { 3855 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV6) 3856 return -EINVAL; 3857 3858 cm_info.ipv4 = false; 3859 irdma_copy_ip_ntohl(cm_info.loc_addr, 3860 laddr6->sin6_addr.__u6_addr.__u6_addr32); 3861 cm_info.loc_port = ntohs(laddr6->sin6_port); 3862 if (!IN6_IS_ADDR_UNSPECIFIED(&laddr6->sin6_addr)) { 3863 irdma_netdev_vlan_ipv6(cm_info.loc_addr, 3864 &cm_info.vlan_id, NULL); 3865 } else { 3866 cm_info.vlan_id = 0xFFFF; 3867 wildcard = true; 3868 } 3869 } 3870 3871 if (cm_info.vlan_id >= VLAN_N_VID && iwdev->dcb_vlan_mode) 3872 cm_info.vlan_id = 0; 3873 cm_info.backlog = backlog; 3874 cm_info.cm_id = cm_id; 3875 3876 cm_listen_node = irdma_make_listen_node(&iwdev->cm_core, iwdev, 3877 &cm_info); 3878 if (!cm_listen_node) { 3879 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3880 "cm_listen_node == NULL\n"); 3881 return -ENOMEM; 3882 } 3883 3884 cm_id->provider_data = cm_listen_node; 3885 3886 cm_listen_node->tos = cm_id->tos; 3887 if (iwdev->vsi.dscp_mode) 3888 cm_listen_node->user_pri = 3889 iwdev->vsi.dscp_map[irdma_tos2dscp(cm_id->tos)]; 3890 else 3891 cm_listen_node->user_pri = rt_tos2priority(cm_id->tos); 3892 cm_info.user_pri = cm_listen_node->user_pri; 3893 if (!cm_listen_node->reused_node) { 3894 if (wildcard) { 3895 err = irdma_add_mqh(iwdev, &cm_info, cm_listen_node); 3896 if (err) 3897 goto error; 3898 } else { 3899 if (!iwdev->vsi.dscp_mode) 3900 cm_info.user_pri = cm_listen_node->user_pri = 3901 irdma_iw_get_vlan_prio(cm_info.loc_addr, 3902 cm_info.user_pri, 3903 cm_info.ipv4); 3904 err = irdma_manage_qhash(iwdev, &cm_info, 3905 IRDMA_QHASH_TYPE_TCP_SYN, 3906 IRDMA_QHASH_MANAGE_TYPE_ADD, 3907 NULL, true); 3908 if (err) 3909 goto error; 3910 3911 cm_listen_node->qhash_set = true; 3912 } 3913 3914 cm_listen_node->apbvt_entry = irdma_add_apbvt(iwdev, 3915 cm_info.loc_port); 3916 if (!cm_listen_node->apbvt_entry) 3917 goto error; 3918 } 3919 cm_id->add_ref(cm_id); 3920 cm_listen_node->cm_core->stats_listen_created++; 3921 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3922 "loc_port=0x%04x loc_addr=%x cm_listen_node=%p cm_id=%p qhash_set=%d vlan_id=%d\n", 3923 cm_listen_node->loc_port, cm_listen_node->loc_addr[0], 3924 cm_listen_node, cm_listen_node->cm_id, 3925 cm_listen_node->qhash_set, cm_listen_node->vlan_id); 3926 3927 return 0; 3928 3929 error: 3930 3931 irdma_cm_del_listen(&iwdev->cm_core, cm_listen_node, false); 3932 3933 return -EINVAL; 3934 } 3935 3936 /** 3937 * irdma_destroy_listen - registered call to destroy listener 3938 * @cm_id: cm information for passive connection 3939 */ 3940 int 3941 irdma_destroy_listen(struct iw_cm_id *cm_id) 3942 { 3943 struct irdma_device *iwdev; 3944 3945 iwdev = to_iwdev(cm_id->device); 3946 if (cm_id->provider_data) 3947 irdma_cm_del_listen(&iwdev->cm_core, cm_id->provider_data, 3948 true); 3949 else 3950 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3951 "cm_id->provider_data was NULL\n"); 3952 3953 cm_id->rem_ref(cm_id); 3954 3955 return 0; 3956 } 3957 3958 /** 3959 * irdma_iw_teardown_list_prep - add conn nodes slated for tear 3960 * down to list 3961 * @cm_core: cm's core 3962 * @teardown_list: a list to which cm_node will be selected 3963 * @ipaddr: pointer to ip address 3964 * @nfo: pointer to cm_info structure instance 3965 * @disconnect_all: flag indicating disconnect all QPs 3966 */ 3967 static void 3968 irdma_iw_teardown_list_prep(struct irdma_cm_core *cm_core, 3969 struct list_head *teardown_list, 3970 u32 *ipaddr, 3971 struct irdma_cm_info *nfo, 3972 bool disconnect_all) 3973 { 3974 struct irdma_cm_node *cm_node; 3975 int bkt; 3976 3977 HASH_FOR_EACH_RCU(cm_core->cm_hash_tbl, bkt, cm_node, list) { 3978 if ((disconnect_all || 3979 (nfo->vlan_id == cm_node->vlan_id && 3980 !memcmp(cm_node->loc_addr, ipaddr, nfo->ipv4 ? 4 : 16))) && 3981 atomic_inc_not_zero(&cm_node->refcnt)) 3982 list_add(&cm_node->teardown_entry, teardown_list); 3983 } 3984 } 3985 3986 static inline bool 3987 irdma_ip_vlan_match(u32 *ip1, u16 vlan_id1, 3988 bool check_vlan, u32 *ip2, 3989 u16 vlan_id2, bool ipv4) 3990 { 3991 return (!check_vlan || vlan_id1 == vlan_id2) && 3992 !memcmp(ip1, ip2, ipv4 ? 4 : 16); 3993 } 3994 3995 /** 3996 * irdma_roce_teardown_list_prep - add conn nodes slated for 3997 * tear down to list 3998 * @iwdev: RDMA device 3999 * @teardown_list: a list to which cm_node will be selected 4000 * @ipaddr: pointer to ip address 4001 * @nfo: pointer to cm_info structure instance 4002 * @disconnect_all: flag indicating disconnect all QPs 4003 */ 4004 static void 4005 irdma_roce_teardown_list_prep(struct irdma_device *iwdev, 4006 struct list_head *teardown_list, 4007 u32 *ipaddr, 4008 struct irdma_cm_info *nfo, 4009 bool disconnect_all) 4010 { 4011 struct irdma_sc_vsi *vsi = &iwdev->vsi; 4012 struct irdma_sc_qp *sc_qp; 4013 struct list_head *list_node; 4014 struct irdma_qp *qp; 4015 unsigned long flags; 4016 int i; 4017 4018 for (i = 0; i < IRDMA_MAX_USER_PRIORITY; i++) { 4019 mutex_lock(&vsi->qos[i].qos_mutex); 4020 list_for_each(list_node, &vsi->qos[i].qplist) { 4021 u32 qp_ip[4]; 4022 4023 sc_qp = container_of(list_node, struct irdma_sc_qp, 4024 list); 4025 if (sc_qp->qp_uk.qp_type != IRDMA_QP_TYPE_ROCE_RC) 4026 continue; 4027 4028 qp = sc_qp->qp_uk.back_qp; 4029 if (!disconnect_all) { 4030 if (nfo->ipv4) 4031 qp_ip[0] = qp->udp_info.local_ipaddr[3]; 4032 else 4033 memcpy(qp_ip, 4034 &qp->udp_info.local_ipaddr[0], 4035 sizeof(qp_ip)); 4036 } 4037 4038 if (disconnect_all || 4039 irdma_ip_vlan_match(qp_ip, 4040 qp->udp_info.vlan_tag & EVL_VLID_MASK, 4041 qp->udp_info.insert_vlan_tag, 4042 ipaddr, nfo->vlan_id, nfo->ipv4)) { 4043 spin_lock_irqsave(&iwdev->rf->qptable_lock, flags); 4044 if (iwdev->rf->qp_table[sc_qp->qp_uk.qp_id]) { 4045 irdma_qp_add_ref(&qp->ibqp); 4046 list_add(&qp->teardown_entry, teardown_list); 4047 } 4048 spin_unlock_irqrestore(&iwdev->rf->qptable_lock, flags); 4049 } 4050 } 4051 mutex_unlock(&vsi->qos[i].qos_mutex); 4052 } 4053 } 4054 4055 /** 4056 * irdma_cm_event_connected - handle connected active node 4057 * @event: the info for cm_node of connection 4058 */ 4059 static void 4060 irdma_cm_event_connected(struct irdma_cm_event *event) 4061 { 4062 struct irdma_qp *iwqp; 4063 struct irdma_device *iwdev; 4064 struct irdma_cm_node *cm_node; 4065 struct irdma_sc_dev *dev; 4066 struct ib_qp_attr attr = {0}; 4067 struct iw_cm_id *cm_id; 4068 int status; 4069 bool read0; 4070 int wait_ret = 0; 4071 4072 cm_node = event->cm_node; 4073 cm_id = cm_node->cm_id; 4074 iwqp = cm_id->provider_data; 4075 iwdev = iwqp->iwdev; 4076 dev = &iwdev->rf->sc_dev; 4077 if (iwqp->sc_qp.qp_uk.destroy_pending) { 4078 status = -ETIMEDOUT; 4079 goto error; 4080 } 4081 4082 irdma_cm_init_tsa_conn(iwqp, cm_node); 4083 read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO); 4084 if (iwqp->page) 4085 iwqp->sc_qp.qp_uk.sq_base = kmap_local_page(iwqp->page); 4086 irdma_sc_send_rtt(&iwqp->sc_qp, read0); 4087 if (iwqp->page) 4088 kunmap_local(iwqp->sc_qp.qp_uk.sq_base); 4089 4090 attr.qp_state = IB_QPS_RTS; 4091 cm_node->qhash_set = false; 4092 irdma_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); 4093 if (dev->hw_attrs.uk_attrs.feature_flags & IRDMA_FEATURE_RTS_AE) { 4094 wait_ret = wait_event_interruptible_timeout(iwqp->waitq, 4095 iwqp->rts_ae_rcvd, 4096 IRDMA_MAX_TIMEOUT); 4097 if (!wait_ret) 4098 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 4099 "Slow Connection: cm_node=%p, loc_port=%d, rem_port=%d, cm_id=%p\n", 4100 cm_node, cm_node->loc_port, 4101 cm_node->rem_port, cm_node->cm_id); 4102 } 4103 4104 irdma_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 0); 4105 cm_node->accelerated = true; 4106 complete(&cm_node->establish_comp); 4107 cm_node->cm_core->cm_free_ah(cm_node); 4108 return; 4109 4110 error: 4111 iwqp->cm_id = NULL; 4112 cm_id->provider_data = NULL; 4113 irdma_send_cm_event(event->cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 4114 status); 4115 irdma_rem_ref_cm_node(event->cm_node); 4116 } 4117 4118 /** 4119 * irdma_cm_event_reset - handle reset 4120 * @event: the info for cm_node of connection 4121 */ 4122 static void 4123 irdma_cm_event_reset(struct irdma_cm_event *event) 4124 { 4125 struct irdma_cm_node *cm_node = event->cm_node; 4126 struct iw_cm_id *cm_id = cm_node->cm_id; 4127 struct irdma_qp *iwqp; 4128 4129 if (!cm_id) 4130 return; 4131 4132 iwqp = cm_id->provider_data; 4133 if (!iwqp) 4134 return; 4135 4136 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 4137 "reset event %p - cm_id = %p\n", event->cm_node, cm_id); 4138 iwqp->cm_id = NULL; 4139 4140 irdma_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT, 4141 -ECONNRESET); 4142 irdma_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0); 4143 } 4144 4145 /** 4146 * irdma_cm_event_handler - send event to cm upper layer 4147 * @work: pointer of cm event info. 4148 */ 4149 static void 4150 irdma_cm_event_handler(struct work_struct *work) 4151 { 4152 struct irdma_cm_event *event = container_of(work, struct irdma_cm_event, event_work); 4153 struct irdma_cm_node *cm_node; 4154 4155 if (!event || !event->cm_node || !event->cm_node->cm_core) 4156 return; 4157 4158 cm_node = event->cm_node; 4159 4160 switch (event->type) { 4161 case IRDMA_CM_EVENT_MPA_REQ: 4162 irdma_send_cm_event(cm_node, cm_node->cm_id, 4163 IW_CM_EVENT_CONNECT_REQUEST, 0); 4164 break; 4165 case IRDMA_CM_EVENT_RESET: 4166 irdma_cm_event_reset(event); 4167 break; 4168 case IRDMA_CM_EVENT_CONNECTED: 4169 if (!event->cm_node->cm_id || 4170 event->cm_node->state != IRDMA_CM_STATE_OFFLOADED) 4171 break; 4172 irdma_cm_event_connected(event); 4173 break; 4174 case IRDMA_CM_EVENT_MPA_REJECT: 4175 if (!event->cm_node->cm_id || 4176 cm_node->state == IRDMA_CM_STATE_OFFLOADED) 4177 break; 4178 irdma_send_cm_event(cm_node, cm_node->cm_id, 4179 IW_CM_EVENT_CONNECT_REPLY, -ECONNREFUSED); 4180 break; 4181 case IRDMA_CM_EVENT_ABORTED: 4182 if (!event->cm_node->cm_id || 4183 event->cm_node->state == IRDMA_CM_STATE_OFFLOADED) 4184 break; 4185 irdma_event_connect_error(event); 4186 break; 4187 default: 4188 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 4189 "bad event type = %d\n", event->type); 4190 break; 4191 } 4192 4193 irdma_rem_ref_cm_node(event->cm_node); 4194 kfree(event); 4195 } 4196 4197 /** 4198 * irdma_cm_post_event - queue event request for worker thread 4199 * @event: cm node's info for up event call 4200 */ 4201 static void 4202 irdma_cm_post_event(struct irdma_cm_event *event) 4203 { 4204 atomic_inc(&event->cm_node->refcnt); 4205 INIT_WORK(&event->event_work, irdma_cm_event_handler); 4206 queue_work(event->cm_node->cm_core->event_wq, &event->event_work); 4207 } 4208 4209 /** 4210 * irdma_cm_teardown_connections - teardown QPs 4211 * @iwdev: device pointer 4212 * @ipaddr: Pointer to IPv4 or IPv6 address 4213 * @nfo: Connection info 4214 * @disconnect_all: flag indicating disconnect all QPs 4215 * 4216 * teardown QPs where source or destination addr matches ip addr 4217 */ 4218 static void __unused 4219 irdma_cm_teardown_connections(struct irdma_device *iwdev, 4220 u32 *ipaddr, 4221 struct irdma_cm_info *nfo, 4222 bool disconnect_all) 4223 { 4224 struct irdma_cm_core *cm_core = &iwdev->cm_core; 4225 struct list_head *list_core_temp; 4226 struct list_head *list_node; 4227 struct irdma_cm_node *cm_node; 4228 struct list_head teardown_list; 4229 struct ib_qp_attr attr; 4230 struct irdma_qp *qp; 4231 4232 INIT_LIST_HEAD(&teardown_list); 4233 4234 rcu_read_lock(); 4235 irdma_iw_teardown_list_prep(cm_core, &teardown_list, ipaddr, nfo, disconnect_all); 4236 rcu_read_unlock(); 4237 4238 attr.qp_state = IB_QPS_ERR; 4239 list_for_each_safe(list_node, list_core_temp, &teardown_list) { 4240 cm_node = container_of(list_node, struct irdma_cm_node, 4241 teardown_entry); 4242 irdma_modify_qp(&cm_node->iwqp->ibqp, &attr, IB_QP_STATE, NULL); 4243 if (iwdev->rf->reset) 4244 irdma_cm_disconn(cm_node->iwqp); 4245 irdma_rem_ref_cm_node(cm_node); 4246 } 4247 4248 if (!rdma_protocol_roce(&iwdev->ibdev, 1)) 4249 return; 4250 4251 INIT_LIST_HEAD(&teardown_list); 4252 irdma_roce_teardown_list_prep(iwdev, &teardown_list, ipaddr, nfo, disconnect_all); 4253 4254 list_for_each_safe(list_node, list_core_temp, &teardown_list) { 4255 qp = container_of(list_node, struct irdma_qp, teardown_entry); 4256 irdma_modify_qp_roce(&qp->ibqp, &attr, IB_QP_STATE, NULL); 4257 irdma_ib_qp_event(qp, IRDMA_QP_EVENT_CATASTROPHIC); 4258 irdma_qp_rem_ref(&qp->ibqp); 4259 } 4260 } 4261