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(*mpa_frame)) { 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(*mpa_frame); 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 1444 /* Sending MSS option */ 1445 union all_known_options *options; 1446 1447 opts.addr = optionsbuf; 1448 if (!cm_node) 1449 return -EINVAL; 1450 1451 options = (union all_known_options *)&optionsbuf[optionssize]; 1452 options->mss.optionnum = OPTION_NUM_MSS; 1453 options->mss.len = sizeof(struct option_mss); 1454 options->mss.mss = htons(cm_node->tcp_cntxt.mss); 1455 optionssize += sizeof(struct option_mss); 1456 1457 options = (union all_known_options *)&optionsbuf[optionssize]; 1458 options->windowscale.optionnum = OPTION_NUM_WINDOW_SCALE; 1459 options->windowscale.len = sizeof(struct option_windowscale); 1460 options->windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale; 1461 optionssize += sizeof(struct option_windowscale); 1462 options = (union all_known_options *)&optionsbuf[optionssize]; 1463 options->eol = OPTION_NUM_EOL; 1464 optionssize += 1; 1465 1466 if (sendack) 1467 flags |= SET_ACK; 1468 1469 opts.size = optionssize; 1470 1471 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, &opts, NULL, NULL, 1472 flags); 1473 if (!sqbuf) 1474 return -ENOMEM; 1475 1476 return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 1, 1477 0); 1478 } 1479 1480 /** 1481 * irdma_send_ack - Send ACK packet 1482 * @cm_node: connection's node 1483 */ 1484 void 1485 irdma_send_ack(struct irdma_cm_node *cm_node) 1486 { 1487 struct irdma_puda_buf *sqbuf; 1488 struct irdma_sc_vsi *vsi = &cm_node->iwdev->vsi; 1489 1490 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, NULL, NULL, 1491 SET_ACK); 1492 if (sqbuf) 1493 irdma_puda_send_buf(vsi->ilq, sqbuf); 1494 } 1495 1496 /** 1497 * irdma_send_fin - Send FIN pkt 1498 * @cm_node: connection's node 1499 */ 1500 static int 1501 irdma_send_fin(struct irdma_cm_node *cm_node) 1502 { 1503 struct irdma_puda_buf *sqbuf; 1504 1505 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, NULL, NULL, 1506 SET_ACK | SET_FIN); 1507 if (!sqbuf) 1508 return -ENOMEM; 1509 1510 return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 1, 1511 0); 1512 } 1513 1514 /** 1515 * irdma_find_listener - find a cm node listening on this addr-port pair 1516 * @cm_core: cm's core 1517 * @dst_addr: listener ip addr 1518 * @ipv4: flag indicating IPv4 when true 1519 * @dst_port: listener tcp port num 1520 * @vlan_id: virtual LAN ID 1521 * @listener_state: state to match with listen node's 1522 */ 1523 static struct irdma_cm_listener * 1524 irdma_find_listener(struct irdma_cm_core *cm_core, u32 *dst_addr, bool ipv4, u16 dst_port, 1525 u16 vlan_id, enum irdma_cm_listener_state listener_state) 1526 { 1527 struct irdma_cm_listener *listen_node; 1528 static const u32 ip_zero[4] = {0, 0, 0, 0}; 1529 u32 listen_addr[4]; 1530 u16 listen_port; 1531 unsigned long flags; 1532 1533 /* walk list and find cm_node associated with this session ID */ 1534 spin_lock_irqsave(&cm_core->listen_list_lock, flags); 1535 list_for_each_entry(listen_node, &cm_core->listen_list, list) { 1536 memcpy(listen_addr, listen_node->loc_addr, sizeof(listen_addr)); 1537 listen_port = listen_node->loc_port; 1538 if (listen_node->ipv4 != ipv4 || listen_port != dst_port || 1539 !(listener_state & listen_node->listener_state)) 1540 continue; 1541 /* compare node pair, return node handle if a match */ 1542 if (!memcmp(listen_addr, ip_zero, sizeof(listen_addr)) || 1543 (!memcmp(listen_addr, dst_addr, sizeof(listen_addr)) && 1544 vlan_id == listen_node->vlan_id)) { 1545 atomic_inc(&listen_node->refcnt); 1546 spin_unlock_irqrestore(&cm_core->listen_list_lock, 1547 flags); 1548 return listen_node; 1549 } 1550 } 1551 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); 1552 1553 return NULL; 1554 } 1555 1556 /** 1557 * irdma_del_multiple_qhash - Remove qhash and child listens 1558 * @iwdev: iWarp device 1559 * @cm_info: CM info for parent listen node 1560 * @cm_parent_listen_node: The parent listen node 1561 */ 1562 static int 1563 irdma_del_multiple_qhash(struct irdma_device *iwdev, 1564 struct irdma_cm_info *cm_info, 1565 struct irdma_cm_listener *cm_parent_listen_node) 1566 { 1567 struct irdma_cm_listener *child_listen_node; 1568 struct list_head *pos, *tpos; 1569 unsigned long flags; 1570 int ret = -EINVAL; 1571 1572 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags); 1573 list_for_each_safe(pos, tpos, 1574 &cm_parent_listen_node->child_listen_list) { 1575 child_listen_node = list_entry(pos, struct irdma_cm_listener, 1576 child_listen_list); 1577 if (child_listen_node->ipv4) 1578 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 1579 "removing child listen for IP=%x, port=%d, vlan=%d\n", 1580 child_listen_node->loc_addr[0], 1581 child_listen_node->loc_port, 1582 child_listen_node->vlan_id); 1583 else 1584 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 1585 "removing child listen for IP=%x:%x:%x:%x, port=%d, vlan=%d\n", 1586 IRDMA_PRINT_IP6(child_listen_node->loc_addr), 1587 child_listen_node->loc_port, 1588 child_listen_node->vlan_id); 1589 list_del(pos); 1590 memcpy(cm_info->loc_addr, child_listen_node->loc_addr, 1591 sizeof(cm_info->loc_addr)); 1592 cm_info->vlan_id = child_listen_node->vlan_id; 1593 if (child_listen_node->qhash_set) { 1594 ret = irdma_manage_qhash(iwdev, cm_info, 1595 IRDMA_QHASH_TYPE_TCP_SYN, 1596 IRDMA_QHASH_MANAGE_TYPE_DELETE, 1597 NULL, false); 1598 child_listen_node->qhash_set = false; 1599 } else { 1600 ret = 0; 1601 } 1602 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 1603 "Child listen node freed = %p\n", 1604 child_listen_node); 1605 kfree(child_listen_node); 1606 cm_parent_listen_node->cm_core->stats_listen_nodes_destroyed++; 1607 } 1608 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); 1609 1610 return ret; 1611 } 1612 1613 static u8 irdma_iw_get_vlan_prio(u32 *loc_addr, u8 prio, bool ipv4) 1614 { 1615 return prio; 1616 } 1617 1618 /** 1619 * irdma_get_vlan_mac_ipv6 - Get the vlan and mac for an IPv6 1620 * address 1621 * @addr: local IPv6 address 1622 * @vlan_id: vlan id for the given IPv6 address 1623 * @mac: mac address for the given IPv6 address 1624 * 1625 * Returns the net_device of the IPv6 address and also sets the 1626 * vlan id and mac for that address. 1627 */ 1628 void 1629 irdma_get_vlan_mac_ipv6(struct iw_cm_id *cm_id, u32 *addr, u16 *vlan_id, u8 *mac) 1630 { 1631 if_t ip_dev = NULL; 1632 struct in6_addr laddr6; 1633 struct vnet *vnet = &init_net; 1634 struct ifaddr *ifa; 1635 u16 scope_id = 0; 1636 1637 irdma_copy_ip_htonl(laddr6.__u6_addr.__u6_addr32, addr); 1638 if (vlan_id) 1639 *vlan_id = 0xFFFF; /* Match rdma_vlan_dev_vlan_id() */ 1640 if (mac) 1641 eth_zero_addr(mac); 1642 1643 if (IN6_IS_SCOPE_LINKLOCAL(&laddr6) || 1644 IN6_IS_ADDR_MC_INTFACELOCAL(&laddr6)) 1645 scope_id = ntohs(laddr6.__u6_addr.__u6_addr16[1]); 1646 1647 #ifdef VIMAGE 1648 vnet = irdma_cmid_to_vnet(cm_id); 1649 #endif 1650 ip_dev = ip6_ifp_find(vnet, laddr6, scope_id); 1651 if (ip_dev) { 1652 if (vlan_id) 1653 *vlan_id = rdma_vlan_dev_vlan_id(ip_dev); 1654 ifa = if_getifaddr(ip_dev); 1655 if (ifa && ifa->ifa_addr && mac) 1656 ether_addr_copy(mac, if_getlladdr(ip_dev)); 1657 } 1658 } 1659 1660 /** 1661 * irdma_get_vlan_ipv4 - Returns the vlan_id for IPv4 address 1662 * @addr: local IPv4 address 1663 */ 1664 u16 1665 irdma_get_vlan_ipv4(struct iw_cm_id *cm_id, u32 *addr) 1666 { 1667 if_t netdev; 1668 struct vnet *vnet = &init_net; 1669 u16 vlan_id = 0xFFFF; 1670 1671 #ifdef VIMAGE 1672 vnet = irdma_cmid_to_vnet(cm_id); 1673 #endif 1674 netdev = ip_ifp_find(vnet, htonl(addr[0])); 1675 if (netdev) { 1676 vlan_id = rdma_vlan_dev_vlan_id(netdev); 1677 dev_put(netdev); 1678 } 1679 1680 return vlan_id; 1681 } 1682 1683 static int 1684 irdma_manage_qhash_wait(struct irdma_pci_f *rf, struct irdma_cm_info *cm_info) 1685 { 1686 struct irdma_cqp_request *cqp_request = cm_info->cqp_request; 1687 int cnt = rf->sc_dev.hw_attrs.max_cqp_compl_wait_time_ms * CQP_TIMEOUT_THRESHOLD; 1688 u32 ret_val; 1689 1690 if (!cqp_request) 1691 return -ENOMEM; 1692 do { 1693 irdma_cqp_ce_handler(rf, &rf->ccq.sc_cq); 1694 mdelay(1); 1695 } while (!READ_ONCE(cqp_request->request_done) && --cnt); 1696 1697 ret_val = cqp_request->compl_info.op_ret_val; 1698 irdma_put_cqp_request(&rf->cqp, cqp_request); 1699 if (cnt) { 1700 if (!ret_val) 1701 return 0; 1702 return -EINVAL; 1703 } 1704 1705 return -ETIMEDOUT; 1706 } 1707 1708 /** 1709 * irdma_add_mqh_ifa_cb - Adds multiple qhashes for IPv4/IPv6 1710 * @arg: Calback argument structure from irdma_add_mqh 1711 * @ifa: Current address to compute against 1712 * @count: Current cumulative output of all callbacks in this iteration 1713 * 1714 * Adds a qhash and a child listen node for a single IPv4/IPv6 address 1715 * on the adapter and adds the associated qhash filter 1716 */ 1717 static u_int 1718 irdma_add_mqh_ifa_cb(void *arg, struct ifaddr *ifa, u_int count) 1719 { 1720 struct irdma_add_mqh_cbs *cbs = arg; 1721 struct irdma_cm_listener *child_listen_node; 1722 struct irdma_cm_info *cm_info = cbs->cm_info; 1723 struct irdma_device *iwdev = cbs->iwdev; 1724 struct irdma_cm_listener *cm_parent_listen_node = cbs->cm_listen_node; 1725 if_t ip_dev = ifa->ifa_ifp; 1726 unsigned long flags; 1727 int ret; 1728 1729 if (count) 1730 return 0; 1731 1732 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_ATOMIC); 1733 if (!child_listen_node) { 1734 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 1735 "listener memory allocation\n"); 1736 return -ENOMEM; 1737 } 1738 1739 memcpy(child_listen_node, cm_parent_listen_node, 1740 sizeof(*child_listen_node)); 1741 cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev); 1742 child_listen_node->vlan_id = cm_info->vlan_id; 1743 if (cm_info->ipv4) { 1744 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 1745 "Allocating child CM Listener forIP=%x, vlan_id=%d, MAC=%x:%x:%x:%x:%x:%x\n", 1746 ((struct sockaddr_in *)&ifa->ifa_addr)->sin_addr.s_addr, 1747 rdma_vlan_dev_vlan_id(ip_dev), 1748 if_getlladdr(ip_dev)[0], if_getlladdr(ip_dev)[1], 1749 if_getlladdr(ip_dev)[2], if_getlladdr(ip_dev)[3], 1750 if_getlladdr(ip_dev)[4], if_getlladdr(ip_dev)[5]); 1751 child_listen_node->loc_addr[0] = 1752 ntohl(((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr); 1753 } else { 1754 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 1755 "IP=%x:%x:%x:%x, vlan_id=%d, MAC=%x:%x:%x:%x:%x:%x\n", 1756 IRDMA_PRINT_IP6(&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr), 1757 rdma_vlan_dev_vlan_id(ip_dev), 1758 if_getlladdr(ip_dev)[0], if_getlladdr(ip_dev)[1], 1759 if_getlladdr(ip_dev)[2], if_getlladdr(ip_dev)[3], 1760 if_getlladdr(ip_dev)[4], if_getlladdr(ip_dev)[5]); 1761 irdma_copy_ip_ntohl(child_listen_node->loc_addr, 1762 ((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr.__u6_addr.__u6_addr32); 1763 } 1764 memcpy(cm_info->loc_addr, child_listen_node->loc_addr, 1765 sizeof(cm_info->loc_addr)); 1766 if (!iwdev->vsi.dscp_mode) 1767 cm_info->user_pri = 1768 irdma_iw_get_vlan_prio(child_listen_node->loc_addr, 1769 cm_info->user_pri, 1770 cm_info->ipv4); 1771 ret = irdma_manage_qhash(iwdev, cm_info, 1772 IRDMA_QHASH_TYPE_TCP_SYN, 1773 IRDMA_QHASH_MANAGE_TYPE_ADD, 1774 NULL, false); 1775 if (ret) { 1776 kfree(child_listen_node); 1777 return ret; 1778 } 1779 /* wait for qhash finish */ 1780 ret = irdma_manage_qhash_wait(iwdev->rf, cm_info); 1781 if (ret) { 1782 kfree(child_listen_node); 1783 return ret; 1784 } 1785 1786 child_listen_node->qhash_set = true; 1787 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags); 1788 list_add(&child_listen_node->child_listen_list, 1789 &cm_parent_listen_node->child_listen_list); 1790 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); 1791 cm_parent_listen_node->cm_core->stats_listen_nodes_created++; 1792 1793 return 0; 1794 } 1795 1796 /** 1797 * irdma_add_mqh - Adds multiple qhashes 1798 * @iwdev: iWarp device 1799 * @cm_info: CM info for parent listen node 1800 * @cm_listen_node: The parent listen node 1801 */ 1802 static int 1803 irdma_add_mqh(struct irdma_device *iwdev, 1804 struct irdma_cm_info *cm_info, 1805 struct irdma_cm_listener *cm_listen_node) 1806 { 1807 struct epoch_tracker et; 1808 struct irdma_add_mqh_cbs cbs; 1809 struct if_iter iter; 1810 if_t ifp; 1811 int err = -ENOENT; 1812 1813 cbs.iwdev = iwdev; 1814 cbs.cm_info = cm_info; 1815 cbs.cm_listen_node = cm_listen_node; 1816 1817 VNET_ITERATOR_DECL(vnet_iter); 1818 1819 VNET_LIST_RLOCK(); 1820 NET_EPOCH_ENTER(et); 1821 VNET_FOREACH(vnet_iter) { 1822 CURVNET_SET_QUIET(vnet_iter); 1823 for (ifp = if_iter_start(&iter); ifp != NULL; ifp = if_iter_next(&iter)) { 1824 if (!(if_getflags(ifp) & IFF_UP)) 1825 continue; 1826 1827 if (((rdma_vlan_dev_vlan_id(ifp) >= VLAN_N_VID) || 1828 (rdma_vlan_dev_real_dev(ifp) != iwdev->netdev)) && 1829 ifp != iwdev->netdev) 1830 continue; 1831 1832 if_addr_rlock(ifp); 1833 if (cm_info->ipv4) 1834 err = if_foreach_addr_type(ifp, AF_INET, irdma_add_mqh_ifa_cb, &cbs); 1835 else 1836 err = if_foreach_addr_type(ifp, AF_INET6, irdma_add_mqh_ifa_cb, &cbs); 1837 if_addr_runlock(ifp); 1838 } 1839 if_iter_finish(&iter); 1840 CURVNET_RESTORE(); 1841 } 1842 NET_EPOCH_EXIT(et); 1843 VNET_LIST_RUNLOCK(); 1844 1845 return err; 1846 } 1847 1848 /** 1849 * irdma_reset_list_prep - add connection nodes slated for reset to list 1850 * @cm_core: cm's core 1851 * @listener: pointer to listener node 1852 * @reset_list: a list to which cm_node will be selected 1853 */ 1854 static void 1855 irdma_reset_list_prep(struct irdma_cm_core *cm_core, 1856 struct irdma_cm_listener *listener, 1857 struct list_head *reset_list) 1858 { 1859 struct irdma_cm_node *cm_node; 1860 int bkt; 1861 1862 HASH_FOR_EACH_RCU(cm_core->cm_hash_tbl, bkt, cm_node, list) { 1863 if (cm_node->listener == listener && 1864 !cm_node->accelerated && 1865 atomic_inc_not_zero(&cm_node->refcnt)) 1866 list_add(&cm_node->reset_entry, reset_list); 1867 } 1868 } 1869 1870 /** 1871 * irdma_dec_refcnt_listen - delete listener and associated cm nodes 1872 * @cm_core: cm's core 1873 * @listener: pointer to listener node 1874 * @free_hanging_nodes: to free associated cm_nodes 1875 * @apbvt_del: flag to delete the apbvt 1876 */ 1877 static int 1878 irdma_dec_refcnt_listen(struct irdma_cm_core *cm_core, 1879 struct irdma_cm_listener *listener, 1880 int free_hanging_nodes, bool apbvt_del) 1881 { 1882 struct list_head *list_pos; 1883 struct list_head *list_temp; 1884 struct irdma_cm_node *cm_node; 1885 struct list_head reset_list; 1886 struct irdma_cm_info nfo; 1887 enum irdma_cm_node_state old_state; 1888 unsigned long flags; 1889 int err; 1890 1891 /* free non-accelerated child nodes for this listener */ 1892 INIT_LIST_HEAD(&reset_list); 1893 if (free_hanging_nodes) { 1894 rcu_read_lock(); 1895 irdma_reset_list_prep(cm_core, listener, &reset_list); 1896 rcu_read_unlock(); 1897 } 1898 1899 list_for_each_safe(list_pos, list_temp, &reset_list) { 1900 cm_node = container_of(list_pos, struct irdma_cm_node, 1901 reset_entry); 1902 if (cm_node->state >= IRDMA_CM_STATE_FIN_WAIT1) { 1903 irdma_rem_ref_cm_node(cm_node); 1904 continue; 1905 } 1906 1907 irdma_cleanup_retrans_entry(cm_node); 1908 err = irdma_send_reset(cm_node); 1909 if (err) { 1910 cm_node->state = IRDMA_CM_STATE_CLOSED; 1911 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 1912 "send reset failed\n"); 1913 } else { 1914 old_state = cm_node->state; 1915 cm_node->state = IRDMA_CM_STATE_LISTENER_DESTROYED; 1916 if (old_state != IRDMA_CM_STATE_MPAREQ_RCVD) 1917 irdma_rem_ref_cm_node(cm_node); 1918 } 1919 } 1920 1921 if (atomic_dec_and_test(&listener->refcnt)) { 1922 spin_lock_irqsave(&cm_core->listen_list_lock, flags); 1923 list_del(&listener->list); 1924 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); 1925 1926 if (apbvt_del) 1927 irdma_del_apbvt(listener->iwdev, 1928 listener->apbvt_entry); 1929 memcpy(nfo.loc_addr, listener->loc_addr, sizeof(nfo.loc_addr)); 1930 nfo.loc_port = listener->loc_port; 1931 nfo.ipv4 = listener->ipv4; 1932 nfo.vlan_id = listener->vlan_id; 1933 nfo.user_pri = listener->user_pri; 1934 nfo.qh_qpid = listener->iwdev->vsi.ilq->qp_id; 1935 1936 if (!list_empty(&listener->child_listen_list)) { 1937 irdma_del_multiple_qhash(listener->iwdev, &nfo, 1938 listener); 1939 } else { 1940 if (listener->qhash_set) 1941 irdma_manage_qhash(listener->iwdev, 1942 &nfo, 1943 IRDMA_QHASH_TYPE_TCP_SYN, 1944 IRDMA_QHASH_MANAGE_TYPE_DELETE, 1945 NULL, false); 1946 } 1947 1948 cm_core->stats_listen_destroyed++; 1949 cm_core->stats_listen_nodes_destroyed++; 1950 irdma_debug(&listener->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 1951 "loc_port=0x%04x loc_addr=%x cm_listen_node=%p cm_id=%p qhash_set=%d vlan_id=%d apbvt_del=%d\n", 1952 listener->loc_port, listener->loc_addr[0], listener, 1953 listener->cm_id, listener->qhash_set, 1954 listener->vlan_id, apbvt_del); 1955 kfree(listener); 1956 listener = NULL; 1957 return 0; 1958 } 1959 1960 return -EINVAL; 1961 } 1962 1963 /** 1964 * irdma_cm_del_listen - delete a listener 1965 * @cm_core: cm's core 1966 * @listener: passive connection's listener 1967 * @apbvt_del: flag to delete apbvt 1968 */ 1969 static int 1970 irdma_cm_del_listen(struct irdma_cm_core *cm_core, 1971 struct irdma_cm_listener *listener, 1972 bool apbvt_del) 1973 { 1974 listener->listener_state = IRDMA_CM_LISTENER_PASSIVE_STATE; 1975 listener->cm_id = NULL; 1976 1977 return irdma_dec_refcnt_listen(cm_core, listener, 1, apbvt_del); 1978 } 1979 1980 /** 1981 * irdma_find_node - find a cm node that matches the reference cm node 1982 * @cm_core: cm's core 1983 * @rem_port: remote tcp port num 1984 * @rem_addr: remote ip addr 1985 * @loc_port: local tcp port num 1986 * @loc_addr: local ip addr 1987 * @vlan_id: local VLAN ID 1988 */ 1989 struct irdma_cm_node * 1990 irdma_find_node(struct irdma_cm_core *cm_core, 1991 u16 rem_port, u32 *rem_addr, u16 loc_port, 1992 u32 *loc_addr, u16 vlan_id) 1993 { 1994 struct irdma_cm_node *cm_node; 1995 u32 key = (rem_port << 16) | loc_port; 1996 1997 rcu_read_lock(); 1998 HASH_FOR_EACH_POSSIBLE_RCU(cm_core->cm_hash_tbl, cm_node, list, key) { 1999 if (cm_node->vlan_id == vlan_id && 2000 cm_node->loc_port == loc_port && cm_node->rem_port == rem_port && 2001 !memcmp(cm_node->loc_addr, loc_addr, sizeof(cm_node->loc_addr)) && 2002 !memcmp(cm_node->rem_addr, rem_addr, sizeof(cm_node->rem_addr))) { 2003 if (!atomic_inc_not_zero(&cm_node->refcnt)) 2004 goto exit; 2005 rcu_read_unlock(); 2006 return cm_node; 2007 } 2008 } 2009 2010 exit: 2011 rcu_read_unlock(); 2012 2013 /* no owner node */ 2014 return NULL; 2015 } 2016 2017 /** 2018 * irdma_add_hte_node - add a cm node to the hash table 2019 * @cm_core: cm's core 2020 * @cm_node: connection's node 2021 */ 2022 static void 2023 irdma_add_hte_node(struct irdma_cm_core *cm_core, 2024 struct irdma_cm_node *cm_node) 2025 { 2026 unsigned long flags; 2027 u32 key = (cm_node->rem_port << 16) | cm_node->loc_port; 2028 2029 spin_lock_irqsave(&cm_core->ht_lock, flags); 2030 HASH_ADD_RCU(cm_core->cm_hash_tbl, &cm_node->list, key); 2031 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 2032 } 2033 2034 /** 2035 * irdma_ipv4_is_lpb - check if loopback 2036 * @loc_addr: local addr to compare 2037 * @rem_addr: remote address 2038 */ 2039 bool 2040 irdma_ipv4_is_lpb(u32 loc_addr, u32 rem_addr) 2041 { 2042 return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr); 2043 } 2044 2045 /** 2046 * irdma_ipv6_is_lpb - check if loopback 2047 * @loc_addr: local addr to compare 2048 * @rem_addr: remote address 2049 */ 2050 bool 2051 irdma_ipv6_is_lpb(u32 *loc_addr, u32 *rem_addr) 2052 { 2053 struct in6_addr raddr6; 2054 2055 irdma_copy_ip_htonl(raddr6.__u6_addr.__u6_addr32, rem_addr); 2056 2057 return !memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6); 2058 } 2059 2060 /** 2061 * irdma_cm_create_ah - create a cm address handle 2062 * @cm_node: The connection manager node to create AH for 2063 * @wait: Provides option to wait for ah creation or not 2064 */ 2065 static int 2066 irdma_cm_create_ah(struct irdma_cm_node *cm_node, bool wait) 2067 { 2068 struct irdma_ah_info ah_info = {0}; 2069 struct irdma_device *iwdev = cm_node->iwdev; 2070 #ifdef VIMAGE 2071 struct vnet *vnet = irdma_cmid_to_vnet(cm_node->cm_id); 2072 #endif 2073 2074 ether_addr_copy(ah_info.mac_addr, if_getlladdr(iwdev->netdev)); 2075 2076 ah_info.hop_ttl = 0x40; 2077 ah_info.tc_tos = cm_node->tos; 2078 ah_info.vsi = &iwdev->vsi; 2079 2080 if (cm_node->ipv4) { 2081 ah_info.ipv4_valid = true; 2082 ah_info.dest_ip_addr[0] = cm_node->rem_addr[0]; 2083 ah_info.src_ip_addr[0] = cm_node->loc_addr[0]; 2084 CURVNET_SET_QUIET(vnet); 2085 ah_info.do_lpbk = irdma_ipv4_is_lpb(ah_info.src_ip_addr[0], 2086 ah_info.dest_ip_addr[0]); 2087 CURVNET_RESTORE(); 2088 } else { 2089 memcpy(ah_info.dest_ip_addr, cm_node->rem_addr, 2090 sizeof(ah_info.dest_ip_addr)); 2091 memcpy(ah_info.src_ip_addr, cm_node->loc_addr, 2092 sizeof(ah_info.src_ip_addr)); 2093 ah_info.do_lpbk = irdma_ipv6_is_lpb(ah_info.src_ip_addr, 2094 ah_info.dest_ip_addr); 2095 } 2096 2097 ah_info.vlan_tag = cm_node->vlan_id; 2098 if (cm_node->vlan_id < VLAN_N_VID) { 2099 ah_info.insert_vlan_tag = 1; 2100 ah_info.vlan_tag |= cm_node->user_pri << VLAN_PRIO_SHIFT; 2101 } 2102 2103 ah_info.dst_arpindex = 2104 irdma_arp_table(iwdev->rf, ah_info.dest_ip_addr, 2105 NULL, IRDMA_ARP_RESOLVE); 2106 2107 if (irdma_puda_create_ah(&iwdev->rf->sc_dev, &ah_info, wait, 2108 IRDMA_PUDA_RSRC_TYPE_ILQ, cm_node, 2109 &cm_node->ah)) 2110 return -ENOMEM; 2111 2112 return 0; 2113 } 2114 2115 /** 2116 * irdma_cm_free_ah - free a cm address handle 2117 * @cm_node: The connection manager node to create AH for 2118 */ 2119 static void 2120 irdma_cm_free_ah(struct irdma_cm_node *cm_node) 2121 { 2122 struct irdma_device *iwdev = cm_node->iwdev; 2123 2124 irdma_puda_free_ah(&iwdev->rf->sc_dev, cm_node->ah); 2125 cm_node->ah = NULL; 2126 } 2127 2128 /** 2129 * irdma_make_cm_node - create a new instance of a cm node 2130 * @cm_core: cm's core 2131 * @iwdev: iwarp device structure 2132 * @cm_info: quad info for connection 2133 * @listener: passive connection's listener 2134 */ 2135 static struct irdma_cm_node * 2136 irdma_make_cm_node(struct irdma_cm_core *cm_core, struct irdma_device *iwdev, 2137 struct irdma_cm_info *cm_info, 2138 struct irdma_cm_listener *listener) 2139 { 2140 struct irdma_cm_node *cm_node; 2141 int arpindex; 2142 if_t netdev = iwdev->netdev; 2143 2144 /* create an hte and cm_node for this instance */ 2145 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC); 2146 if (!cm_node) 2147 return NULL; 2148 2149 /* set our node specific transport info */ 2150 cm_node->ipv4 = cm_info->ipv4; 2151 cm_node->vlan_id = cm_info->vlan_id; 2152 if (cm_node->vlan_id >= VLAN_N_VID && iwdev->dcb_vlan_mode) 2153 cm_node->vlan_id = 0; 2154 cm_node->tos = cm_info->tos; 2155 cm_node->user_pri = cm_info->user_pri; 2156 if (listener) { 2157 if (listener->tos != cm_info->tos) 2158 irdma_dev_warn(&iwdev->ibdev, 2159 "application TOS[%d] and remote client TOS[%d] mismatch\n", 2160 listener->tos, cm_info->tos); 2161 if (iwdev->vsi.dscp_mode) { 2162 cm_node->user_pri = listener->user_pri; 2163 } else { 2164 cm_node->tos = max(listener->tos, cm_info->tos); 2165 cm_node->user_pri = rt_tos2priority(cm_node->tos); 2166 cm_node->user_pri = 2167 irdma_iw_get_vlan_prio(cm_info->loc_addr, 2168 cm_node->user_pri, 2169 cm_info->ipv4); 2170 } 2171 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_DCB, 2172 "listener: TOS:[%d] UP:[%d]\n", cm_node->tos, 2173 cm_node->user_pri); 2174 } 2175 memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr)); 2176 memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr)); 2177 cm_node->loc_port = cm_info->loc_port; 2178 cm_node->rem_port = cm_info->rem_port; 2179 2180 cm_node->mpa_frame_rev = IRDMA_CM_DEFAULT_MPA_VER; 2181 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO; 2182 cm_node->iwdev = iwdev; 2183 cm_node->dev = &iwdev->rf->sc_dev; 2184 2185 cm_node->ird_size = cm_node->dev->hw_attrs.max_hw_ird; 2186 cm_node->ord_size = cm_node->dev->hw_attrs.max_hw_ord; 2187 2188 cm_node->listener = listener; 2189 cm_node->cm_id = cm_info->cm_id; 2190 ether_addr_copy(cm_node->loc_mac, if_getlladdr(netdev)); 2191 spin_lock_init(&cm_node->retrans_list_lock); 2192 cm_node->ack_rcvd = false; 2193 2194 init_completion(&cm_node->establish_comp); 2195 atomic_set(&cm_node->refcnt, 1); 2196 /* associate our parent CM core */ 2197 cm_node->cm_core = cm_core; 2198 cm_node->tcp_cntxt.loc_id = IRDMA_CM_DEFAULT_LOCAL_ID; 2199 cm_node->tcp_cntxt.rcv_wscale = iwdev->rcv_wscale; 2200 cm_node->tcp_cntxt.rcv_wnd = iwdev->rcv_wnd >> cm_node->tcp_cntxt.rcv_wscale; 2201 kc_set_loc_seq_num_mss(cm_node); 2202 2203 arpindex = irdma_resolve_neigh_lpb_chk(iwdev, cm_node, cm_info); 2204 if (arpindex < 0) 2205 goto err; 2206 2207 ether_addr_copy(cm_node->rem_mac, iwdev->rf->arp_table[arpindex].mac_addr); 2208 irdma_add_hte_node(cm_core, cm_node); 2209 cm_core->stats_nodes_created++; 2210 return cm_node; 2211 2212 err: 2213 kfree(cm_node); 2214 2215 return NULL; 2216 } 2217 2218 static void 2219 irdma_destroy_connection(struct irdma_cm_node *cm_node) 2220 { 2221 struct irdma_cm_core *cm_core = cm_node->cm_core; 2222 struct irdma_qp *iwqp; 2223 struct irdma_cm_info nfo; 2224 2225 /* if the node is destroyed before connection was accelerated */ 2226 if (!cm_node->accelerated && cm_node->accept_pend) { 2227 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2228 "node destroyed before established\n"); 2229 atomic_dec(&cm_node->listener->pend_accepts_cnt); 2230 } 2231 if (cm_node->close_entry) 2232 irdma_handle_close_entry(cm_node, 0); 2233 if (cm_node->listener) { 2234 irdma_dec_refcnt_listen(cm_core, cm_node->listener, 0, true); 2235 } else { 2236 if (cm_node->apbvt_set) { 2237 irdma_del_apbvt(cm_node->iwdev, cm_node->apbvt_entry); 2238 cm_node->apbvt_set = 0; 2239 } 2240 irdma_get_addr_info(cm_node, &nfo); 2241 if (cm_node->qhash_set) { 2242 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id; 2243 irdma_manage_qhash(cm_node->iwdev, &nfo, 2244 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 2245 IRDMA_QHASH_MANAGE_TYPE_DELETE, NULL, 2246 false); 2247 cm_node->qhash_set = 0; 2248 } 2249 } 2250 2251 iwqp = cm_node->iwqp; 2252 if (iwqp) { 2253 cm_node->cm_id->rem_ref(cm_node->cm_id); 2254 cm_node->cm_id = NULL; 2255 iwqp->cm_id = NULL; 2256 irdma_qp_rem_ref(&iwqp->ibqp); 2257 cm_node->iwqp = NULL; 2258 } else if (cm_node->qhash_set) { 2259 irdma_get_addr_info(cm_node, &nfo); 2260 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id; 2261 irdma_manage_qhash(cm_node->iwdev, &nfo, 2262 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 2263 IRDMA_QHASH_MANAGE_TYPE_DELETE, NULL, false); 2264 cm_node->qhash_set = 0; 2265 } 2266 2267 cm_core->cm_free_ah(cm_node); 2268 } 2269 2270 /** 2271 * irdma_rem_ref_cm_node - destroy an instance of a cm node 2272 * @cm_node: connection's node 2273 */ 2274 void 2275 irdma_rem_ref_cm_node(struct irdma_cm_node *cm_node) 2276 { 2277 struct irdma_cm_core *cm_core = cm_node->cm_core; 2278 unsigned long flags; 2279 2280 spin_lock_irqsave(&cm_core->ht_lock, flags); 2281 2282 if (!atomic_dec_and_test(&cm_node->refcnt)) { 2283 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 2284 return; 2285 } 2286 if (cm_node->iwqp) { 2287 cm_node->iwqp->cm_node = NULL; 2288 cm_node->iwqp->cm_id = NULL; 2289 } 2290 HASH_DEL_RCU(cm_core->cm_hash_tbl, &cm_node->list); 2291 cm_node->cm_core->stats_nodes_destroyed++; 2292 2293 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 2294 2295 irdma_destroy_connection(cm_node); 2296 2297 kfree_rcu(cm_node, rcu_head); 2298 } 2299 2300 /** 2301 * irdma_handle_fin_pkt - FIN packet received 2302 * @cm_node: connection's node 2303 */ 2304 static void 2305 irdma_handle_fin_pkt(struct irdma_cm_node *cm_node) 2306 { 2307 switch (cm_node->state) { 2308 case IRDMA_CM_STATE_SYN_RCVD: 2309 case IRDMA_CM_STATE_SYN_SENT: 2310 case IRDMA_CM_STATE_ESTABLISHED: 2311 case IRDMA_CM_STATE_MPAREJ_RCVD: 2312 cm_node->tcp_cntxt.rcv_nxt++; 2313 irdma_cleanup_retrans_entry(cm_node); 2314 cm_node->state = IRDMA_CM_STATE_LAST_ACK; 2315 irdma_send_fin(cm_node); 2316 break; 2317 case IRDMA_CM_STATE_MPAREQ_SENT: 2318 irdma_create_event(cm_node, IRDMA_CM_EVENT_ABORTED); 2319 cm_node->tcp_cntxt.rcv_nxt++; 2320 irdma_cleanup_retrans_entry(cm_node); 2321 cm_node->state = IRDMA_CM_STATE_CLOSED; 2322 atomic_inc(&cm_node->refcnt); 2323 irdma_send_reset(cm_node); 2324 break; 2325 case IRDMA_CM_STATE_FIN_WAIT1: 2326 cm_node->tcp_cntxt.rcv_nxt++; 2327 irdma_cleanup_retrans_entry(cm_node); 2328 cm_node->state = IRDMA_CM_STATE_CLOSING; 2329 irdma_send_ack(cm_node); 2330 /* 2331 * Wait for ACK as this is simultaneous close. After we receive ACK, do not send anything. Just rm the 2332 * node. 2333 */ 2334 break; 2335 case IRDMA_CM_STATE_FIN_WAIT2: 2336 cm_node->tcp_cntxt.rcv_nxt++; 2337 irdma_cleanup_retrans_entry(cm_node); 2338 cm_node->state = IRDMA_CM_STATE_TIME_WAIT; 2339 irdma_send_ack(cm_node); 2340 irdma_schedule_cm_timer(cm_node, NULL, IRDMA_TIMER_TYPE_CLOSE, 2341 1, 0); 2342 break; 2343 case IRDMA_CM_STATE_TIME_WAIT: 2344 cm_node->tcp_cntxt.rcv_nxt++; 2345 irdma_cleanup_retrans_entry(cm_node); 2346 cm_node->state = IRDMA_CM_STATE_CLOSED; 2347 irdma_rem_ref_cm_node(cm_node); 2348 break; 2349 case IRDMA_CM_STATE_OFFLOADED: 2350 default: 2351 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2352 "bad state node state = %d\n", cm_node->state); 2353 break; 2354 } 2355 } 2356 2357 /** 2358 * irdma_handle_rst_pkt - process received RST packet 2359 * @cm_node: connection's node 2360 * @rbuf: receive buffer 2361 */ 2362 static void 2363 irdma_handle_rst_pkt(struct irdma_cm_node *cm_node, 2364 struct irdma_puda_buf *rbuf) 2365 { 2366 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2367 "caller: %pS cm_node=%p state=%d rem_port=0x%04x loc_port=0x%04x rem_addr=%x loc_addr=%x\n", 2368 __builtin_return_address(0), cm_node, cm_node->state, 2369 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr[0], 2370 cm_node->loc_addr[0]); 2371 2372 irdma_cleanup_retrans_entry(cm_node); 2373 switch (cm_node->state) { 2374 case IRDMA_CM_STATE_SYN_SENT: 2375 case IRDMA_CM_STATE_MPAREQ_SENT: 2376 switch (cm_node->mpa_frame_rev) { 2377 case IETF_MPA_V2: 2378 /* Drop down to MPA_V1 */ 2379 cm_node->mpa_frame_rev = IETF_MPA_V1; 2380 /* send a syn and goto syn sent state */ 2381 cm_node->state = IRDMA_CM_STATE_SYN_SENT; 2382 if (irdma_send_syn(cm_node, 0)) 2383 irdma_active_open_err(cm_node, false); 2384 break; 2385 case IETF_MPA_V1: 2386 default: 2387 irdma_active_open_err(cm_node, false); 2388 break; 2389 } 2390 break; 2391 case IRDMA_CM_STATE_MPAREQ_RCVD: 2392 atomic_inc(&cm_node->passive_state); 2393 break; 2394 case IRDMA_CM_STATE_ESTABLISHED: 2395 case IRDMA_CM_STATE_SYN_RCVD: 2396 case IRDMA_CM_STATE_LISTENING: 2397 irdma_passive_open_err(cm_node, false); 2398 break; 2399 case IRDMA_CM_STATE_OFFLOADED: 2400 irdma_active_open_err(cm_node, false); 2401 break; 2402 case IRDMA_CM_STATE_CLOSED: 2403 break; 2404 case IRDMA_CM_STATE_FIN_WAIT2: 2405 case IRDMA_CM_STATE_FIN_WAIT1: 2406 case IRDMA_CM_STATE_LAST_ACK: 2407 case IRDMA_CM_STATE_TIME_WAIT: 2408 cm_node->state = IRDMA_CM_STATE_CLOSED; 2409 irdma_rem_ref_cm_node(cm_node); 2410 break; 2411 default: 2412 break; 2413 } 2414 } 2415 2416 /** 2417 * irdma_handle_rcv_mpa - Process a recv'd mpa buffer 2418 * @cm_node: connection's node 2419 * @rbuf: receive buffer 2420 */ 2421 static void 2422 irdma_handle_rcv_mpa(struct irdma_cm_node *cm_node, 2423 struct irdma_puda_buf *rbuf) 2424 { 2425 int err; 2426 int datasize = rbuf->datalen; 2427 u8 *dataloc = rbuf->data; 2428 2429 enum irdma_cm_event_type type = IRDMA_CM_EVENT_UNKNOWN; 2430 u32 res_type; 2431 2432 err = irdma_parse_mpa(cm_node, dataloc, &res_type, datasize); 2433 if (err) { 2434 if (cm_node->state == IRDMA_CM_STATE_MPAREQ_SENT) 2435 irdma_active_open_err(cm_node, true); 2436 else 2437 irdma_passive_open_err(cm_node, true); 2438 return; 2439 } 2440 2441 switch (cm_node->state) { 2442 case IRDMA_CM_STATE_ESTABLISHED: 2443 if (res_type == IRDMA_MPA_REQUEST_REJECT) 2444 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2445 "state for reject\n"); 2446 cm_node->state = IRDMA_CM_STATE_MPAREQ_RCVD; 2447 type = IRDMA_CM_EVENT_MPA_REQ; 2448 irdma_send_ack(cm_node); /* ACK received MPA request */ 2449 atomic_set(&cm_node->passive_state, 2450 IRDMA_PASSIVE_STATE_INDICATED); 2451 break; 2452 case IRDMA_CM_STATE_MPAREQ_SENT: 2453 irdma_cleanup_retrans_entry(cm_node); 2454 if (res_type == IRDMA_MPA_REQUEST_REJECT) { 2455 type = IRDMA_CM_EVENT_MPA_REJECT; 2456 cm_node->state = IRDMA_CM_STATE_MPAREJ_RCVD; 2457 } else { 2458 type = IRDMA_CM_EVENT_CONNECTED; 2459 cm_node->state = IRDMA_CM_STATE_OFFLOADED; 2460 } 2461 irdma_send_ack(cm_node); 2462 break; 2463 default: 2464 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2465 "wrong cm_node state=%d\n", cm_node->state); 2466 break; 2467 } 2468 irdma_create_event(cm_node, type); 2469 } 2470 2471 /** 2472 * irdma_check_syn - Check for error on received syn ack 2473 * @cm_node: connection's node 2474 * @tcph: pointer tcp header 2475 */ 2476 static int 2477 irdma_check_syn(struct irdma_cm_node *cm_node, struct tcphdr *tcph) 2478 { 2479 if (ntohl(tcph->th_ack) != cm_node->tcp_cntxt.loc_seq_num) { 2480 irdma_active_open_err(cm_node, true); 2481 return 1; 2482 } 2483 2484 return 0; 2485 } 2486 2487 /** 2488 * irdma_check_seq - check seq numbers if OK 2489 * @cm_node: connection's node 2490 * @tcph: pointer tcp header 2491 */ 2492 static int 2493 irdma_check_seq(struct irdma_cm_node *cm_node, struct tcphdr *tcph) 2494 { 2495 u32 seq; 2496 u32 ack_seq; 2497 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num; 2498 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt; 2499 u32 rcv_wnd; 2500 int err = 0; 2501 2502 seq = ntohl(tcph->th_seq); 2503 ack_seq = ntohl(tcph->th_ack); 2504 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd; 2505 if (ack_seq != loc_seq_num || 2506 !between(seq, rcv_nxt, (rcv_nxt + rcv_wnd))) 2507 err = -1; 2508 if (err) 2509 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2510 "seq number err\n"); 2511 2512 return err; 2513 } 2514 2515 void 2516 irdma_add_conn_est_qh(struct irdma_cm_node *cm_node) 2517 { 2518 struct irdma_cm_info nfo; 2519 2520 irdma_get_addr_info(cm_node, &nfo); 2521 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id; 2522 irdma_manage_qhash(cm_node->iwdev, &nfo, 2523 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 2524 IRDMA_QHASH_MANAGE_TYPE_ADD, 2525 cm_node, false); 2526 cm_node->qhash_set = true; 2527 } 2528 2529 /** 2530 * irdma_handle_syn_pkt - is for Passive node 2531 * @cm_node: connection's node 2532 * @rbuf: receive buffer 2533 */ 2534 static void 2535 irdma_handle_syn_pkt(struct irdma_cm_node *cm_node, 2536 struct irdma_puda_buf *rbuf) 2537 { 2538 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2539 int err; 2540 u32 inc_sequence; 2541 int optionsize; 2542 2543 optionsize = (tcph->th_off << 2) - sizeof(*tcph); 2544 inc_sequence = ntohl(tcph->th_seq); 2545 2546 switch (cm_node->state) { 2547 case IRDMA_CM_STATE_SYN_SENT: 2548 case IRDMA_CM_STATE_MPAREQ_SENT: 2549 /* Rcvd syn on active open connection */ 2550 irdma_active_open_err(cm_node, 1); 2551 break; 2552 case IRDMA_CM_STATE_LISTENING: 2553 /* Passive OPEN */ 2554 if (atomic_read(&cm_node->listener->pend_accepts_cnt) > 2555 cm_node->listener->backlog) { 2556 cm_node->cm_core->stats_backlog_drops++; 2557 irdma_passive_open_err(cm_node, false); 2558 break; 2559 } 2560 err = irdma_handle_tcp_options(cm_node, tcph, optionsize, 1); 2561 if (err) { 2562 irdma_passive_open_err(cm_node, false); 2563 /* drop pkt */ 2564 break; 2565 } 2566 err = cm_node->cm_core->cm_create_ah(cm_node, false); 2567 if (err) { 2568 irdma_passive_open_err(cm_node, false); 2569 /* drop pkt */ 2570 break; 2571 } 2572 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; 2573 cm_node->accept_pend = 1; 2574 atomic_inc(&cm_node->listener->pend_accepts_cnt); 2575 2576 cm_node->state = IRDMA_CM_STATE_SYN_RCVD; 2577 break; 2578 case IRDMA_CM_STATE_CLOSED: 2579 irdma_cleanup_retrans_entry(cm_node); 2580 atomic_inc(&cm_node->refcnt); 2581 irdma_send_reset(cm_node); 2582 break; 2583 case IRDMA_CM_STATE_OFFLOADED: 2584 case IRDMA_CM_STATE_ESTABLISHED: 2585 case IRDMA_CM_STATE_FIN_WAIT1: 2586 case IRDMA_CM_STATE_FIN_WAIT2: 2587 case IRDMA_CM_STATE_MPAREQ_RCVD: 2588 case IRDMA_CM_STATE_LAST_ACK: 2589 case IRDMA_CM_STATE_CLOSING: 2590 case IRDMA_CM_STATE_UNKNOWN: 2591 default: 2592 break; 2593 } 2594 } 2595 2596 /** 2597 * irdma_handle_synack_pkt - Process SYN+ACK packet (active side) 2598 * @cm_node: connection's node 2599 * @rbuf: receive buffer 2600 */ 2601 static void 2602 irdma_handle_synack_pkt(struct irdma_cm_node *cm_node, 2603 struct irdma_puda_buf *rbuf) 2604 { 2605 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2606 int err; 2607 u32 inc_sequence; 2608 int optionsize; 2609 2610 optionsize = (tcph->th_off << 2) - sizeof(*tcph); 2611 inc_sequence = ntohl(tcph->th_seq); 2612 switch (cm_node->state) { 2613 case IRDMA_CM_STATE_SYN_SENT: 2614 irdma_cleanup_retrans_entry(cm_node); 2615 /* active open */ 2616 if (irdma_check_syn(cm_node, tcph)) { 2617 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2618 "check syn fail\n"); 2619 return; 2620 } 2621 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->th_ack); 2622 /* setup options */ 2623 err = irdma_handle_tcp_options(cm_node, tcph, optionsize, 0); 2624 if (err) { 2625 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2626 "cm_node=%p tcp_options failed\n", cm_node); 2627 break; 2628 } 2629 irdma_cleanup_retrans_entry(cm_node); 2630 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; 2631 irdma_send_ack(cm_node); /* ACK for the syn_ack */ 2632 err = irdma_send_mpa_request(cm_node); 2633 if (err) { 2634 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2635 "cm_node=%p irdma_send_mpa_request failed\n", 2636 cm_node); 2637 break; 2638 } 2639 cm_node->state = IRDMA_CM_STATE_MPAREQ_SENT; 2640 break; 2641 case IRDMA_CM_STATE_MPAREQ_RCVD: 2642 irdma_passive_open_err(cm_node, true); 2643 break; 2644 case IRDMA_CM_STATE_LISTENING: 2645 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->th_ack); 2646 irdma_cleanup_retrans_entry(cm_node); 2647 cm_node->state = IRDMA_CM_STATE_CLOSED; 2648 irdma_send_reset(cm_node); 2649 break; 2650 case IRDMA_CM_STATE_CLOSED: 2651 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->th_ack); 2652 irdma_cleanup_retrans_entry(cm_node); 2653 atomic_inc(&cm_node->refcnt); 2654 irdma_send_reset(cm_node); 2655 break; 2656 case IRDMA_CM_STATE_ESTABLISHED: 2657 case IRDMA_CM_STATE_FIN_WAIT1: 2658 case IRDMA_CM_STATE_FIN_WAIT2: 2659 case IRDMA_CM_STATE_LAST_ACK: 2660 case IRDMA_CM_STATE_OFFLOADED: 2661 case IRDMA_CM_STATE_CLOSING: 2662 case IRDMA_CM_STATE_UNKNOWN: 2663 case IRDMA_CM_STATE_MPAREQ_SENT: 2664 default: 2665 break; 2666 } 2667 } 2668 2669 /** 2670 * irdma_handle_ack_pkt - process packet with ACK 2671 * @cm_node: connection's node 2672 * @rbuf: receive buffer 2673 */ 2674 static int 2675 irdma_handle_ack_pkt(struct irdma_cm_node *cm_node, 2676 struct irdma_puda_buf *rbuf) 2677 { 2678 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2679 u32 inc_sequence; 2680 int ret; 2681 int optionsize; 2682 u32 datasize = rbuf->datalen; 2683 2684 optionsize = (tcph->th_off << 2) - sizeof(*tcph); 2685 2686 if (irdma_check_seq(cm_node, tcph)) 2687 return -EINVAL; 2688 2689 inc_sequence = ntohl(tcph->th_seq); 2690 switch (cm_node->state) { 2691 case IRDMA_CM_STATE_SYN_RCVD: 2692 irdma_cleanup_retrans_entry(cm_node); 2693 ret = irdma_handle_tcp_options(cm_node, tcph, optionsize, 1); 2694 if (ret) 2695 return ret; 2696 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->th_ack); 2697 cm_node->state = IRDMA_CM_STATE_ESTABLISHED; 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_ESTABLISHED: 2704 irdma_cleanup_retrans_entry(cm_node); 2705 if (datasize) { 2706 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; 2707 irdma_handle_rcv_mpa(cm_node, rbuf); 2708 } 2709 break; 2710 case IRDMA_CM_STATE_MPAREQ_SENT: 2711 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->th_ack); 2712 if (datasize) { 2713 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; 2714 cm_node->ack_rcvd = false; 2715 irdma_handle_rcv_mpa(cm_node, rbuf); 2716 } else { 2717 cm_node->ack_rcvd = true; 2718 } 2719 break; 2720 case IRDMA_CM_STATE_LISTENING: 2721 irdma_cleanup_retrans_entry(cm_node); 2722 cm_node->state = IRDMA_CM_STATE_CLOSED; 2723 irdma_send_reset(cm_node); 2724 break; 2725 case IRDMA_CM_STATE_CLOSED: 2726 irdma_cleanup_retrans_entry(cm_node); 2727 atomic_inc(&cm_node->refcnt); 2728 irdma_send_reset(cm_node); 2729 break; 2730 case IRDMA_CM_STATE_LAST_ACK: 2731 case IRDMA_CM_STATE_CLOSING: 2732 irdma_cleanup_retrans_entry(cm_node); 2733 cm_node->state = IRDMA_CM_STATE_CLOSED; 2734 irdma_rem_ref_cm_node(cm_node); 2735 break; 2736 case IRDMA_CM_STATE_FIN_WAIT1: 2737 irdma_cleanup_retrans_entry(cm_node); 2738 cm_node->state = IRDMA_CM_STATE_FIN_WAIT2; 2739 break; 2740 case IRDMA_CM_STATE_SYN_SENT: 2741 case IRDMA_CM_STATE_FIN_WAIT2: 2742 case IRDMA_CM_STATE_OFFLOADED: 2743 case IRDMA_CM_STATE_MPAREQ_RCVD: 2744 case IRDMA_CM_STATE_UNKNOWN: 2745 default: 2746 irdma_cleanup_retrans_entry(cm_node); 2747 break; 2748 } 2749 2750 return 0; 2751 } 2752 2753 /** 2754 * irdma_process_pkt - process cm packet 2755 * @cm_node: connection's node 2756 * @rbuf: receive buffer 2757 */ 2758 static void 2759 irdma_process_pkt(struct irdma_cm_node *cm_node, 2760 struct irdma_puda_buf *rbuf) 2761 { 2762 enum irdma_tcpip_pkt_type pkt_type = IRDMA_PKT_TYPE_UNKNOWN; 2763 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2764 u32 fin_set = 0; 2765 int err; 2766 2767 if (tcph->th_flags & TH_RST) { 2768 pkt_type = IRDMA_PKT_TYPE_RST; 2769 } else if (tcph->th_flags & TH_SYN) { 2770 pkt_type = IRDMA_PKT_TYPE_SYN; 2771 if (tcph->th_flags & TH_ACK) 2772 pkt_type = IRDMA_PKT_TYPE_SYNACK; 2773 } else if (tcph->th_flags & TH_ACK) { 2774 pkt_type = IRDMA_PKT_TYPE_ACK; 2775 } 2776 if (tcph->th_flags & TH_FIN) 2777 fin_set = 1; 2778 2779 switch (pkt_type) { 2780 case IRDMA_PKT_TYPE_SYN: 2781 irdma_handle_syn_pkt(cm_node, rbuf); 2782 break; 2783 case IRDMA_PKT_TYPE_SYNACK: 2784 irdma_handle_synack_pkt(cm_node, rbuf); 2785 break; 2786 case IRDMA_PKT_TYPE_ACK: 2787 err = irdma_handle_ack_pkt(cm_node, rbuf); 2788 if (fin_set && !err) 2789 irdma_handle_fin_pkt(cm_node); 2790 break; 2791 case IRDMA_PKT_TYPE_RST: 2792 irdma_handle_rst_pkt(cm_node, rbuf); 2793 break; 2794 default: 2795 if (fin_set && 2796 (!irdma_check_seq(cm_node, (struct tcphdr *)rbuf->tcph))) 2797 irdma_handle_fin_pkt(cm_node); 2798 break; 2799 } 2800 } 2801 2802 /** 2803 * irdma_make_listen_node - create a listen node with params 2804 * @cm_core: cm's core 2805 * @iwdev: iwarp device structure 2806 * @cm_info: quad info for connection 2807 */ 2808 static struct irdma_cm_listener * 2809 irdma_make_listen_node(struct irdma_cm_core *cm_core, 2810 struct irdma_device *iwdev, 2811 struct irdma_cm_info *cm_info) 2812 { 2813 struct irdma_cm_listener *listener; 2814 unsigned long flags; 2815 2816 /* cannot have multiple matching listeners */ 2817 listener = irdma_find_listener(cm_core, cm_info->loc_addr, cm_info->ipv4, 2818 cm_info->loc_port, cm_info->vlan_id, 2819 IRDMA_CM_LISTENER_EITHER_STATE); 2820 if (listener && 2821 listener->listener_state == IRDMA_CM_LISTENER_ACTIVE_STATE) { 2822 atomic_dec(&listener->refcnt); 2823 return NULL; 2824 } 2825 2826 if (!listener) { 2827 /* 2828 * create a CM listen node 1/2 node to compare incoming traffic to 2829 */ 2830 listener = kzalloc(sizeof(*listener), GFP_KERNEL); 2831 if (!listener) 2832 return NULL; 2833 cm_core->stats_listen_nodes_created++; 2834 memcpy(listener->loc_addr, cm_info->loc_addr, 2835 sizeof(listener->loc_addr)); 2836 listener->loc_port = cm_info->loc_port; 2837 2838 INIT_LIST_HEAD(&listener->child_listen_list); 2839 2840 atomic_set(&listener->refcnt, 1); 2841 } else { 2842 listener->reused_node = 1; 2843 } 2844 2845 listener->cm_id = cm_info->cm_id; 2846 listener->ipv4 = cm_info->ipv4; 2847 listener->vlan_id = cm_info->vlan_id; 2848 atomic_set(&listener->pend_accepts_cnt, 0); 2849 listener->cm_core = cm_core; 2850 listener->iwdev = iwdev; 2851 2852 listener->backlog = cm_info->backlog; 2853 listener->listener_state = IRDMA_CM_LISTENER_ACTIVE_STATE; 2854 2855 if (!listener->reused_node) { 2856 spin_lock_irqsave(&cm_core->listen_list_lock, flags); 2857 list_add(&listener->list, &cm_core->listen_list); 2858 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); 2859 } 2860 2861 return listener; 2862 } 2863 2864 /** 2865 * irdma_create_cm_node - make a connection node with params 2866 * @cm_core: cm's core 2867 * @iwdev: iwarp device structure 2868 * @conn_param: connection parameters 2869 * @cm_info: quad info for connection 2870 * @caller_cm_node: pointer to cm_node structure to return 2871 */ 2872 static int 2873 irdma_create_cm_node(struct irdma_cm_core *cm_core, 2874 struct irdma_device *iwdev, 2875 struct iw_cm_conn_param *conn_param, 2876 struct irdma_cm_info *cm_info, 2877 struct irdma_cm_node **caller_cm_node) 2878 { 2879 struct irdma_cm_node *cm_node; 2880 u16 private_data_len = conn_param->private_data_len; 2881 const void *private_data = conn_param->private_data; 2882 2883 /* create a CM connection node */ 2884 cm_node = irdma_make_cm_node(cm_core, iwdev, cm_info, NULL); 2885 if (!cm_node) 2886 return -ENOMEM; 2887 2888 /* set our node side to client (active) side */ 2889 cm_node->tcp_cntxt.client = 1; 2890 cm_node->tcp_cntxt.rcv_wscale = IRDMA_CM_DEFAULT_RCV_WND_SCALE; 2891 2892 irdma_record_ird_ord(cm_node, conn_param->ird, conn_param->ord); 2893 2894 cm_node->pdata.size = private_data_len; 2895 cm_node->pdata.addr = cm_node->pdata_buf; 2896 2897 memcpy(cm_node->pdata_buf, private_data, private_data_len); 2898 *caller_cm_node = cm_node; 2899 2900 return 0; 2901 } 2902 2903 /** 2904 * irdma_cm_reject - reject and teardown a connection 2905 * @cm_node: connection's node 2906 * @pdata: ptr to private data for reject 2907 * @plen: size of private data 2908 */ 2909 static int 2910 irdma_cm_reject(struct irdma_cm_node *cm_node, const void *pdata, 2911 u8 plen) 2912 { 2913 int ret; 2914 int passive_state; 2915 2916 if (cm_node->tcp_cntxt.client) 2917 return 0; 2918 2919 irdma_cleanup_retrans_entry(cm_node); 2920 2921 passive_state = atomic_add_return(1, &cm_node->passive_state); 2922 if (passive_state == IRDMA_SEND_RESET_EVENT) { 2923 cm_node->state = IRDMA_CM_STATE_CLOSED; 2924 irdma_rem_ref_cm_node(cm_node); 2925 return 0; 2926 } 2927 2928 if (cm_node->state == IRDMA_CM_STATE_LISTENER_DESTROYED) { 2929 irdma_rem_ref_cm_node(cm_node); 2930 return 0; 2931 } 2932 2933 ret = irdma_send_mpa_reject(cm_node, pdata, plen); 2934 if (!ret) 2935 return 0; 2936 2937 cm_node->state = IRDMA_CM_STATE_CLOSED; 2938 if (irdma_send_reset(cm_node)) 2939 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2940 "send reset failed\n"); 2941 2942 return ret; 2943 } 2944 2945 /** 2946 * irdma_cm_close - close of cm connection 2947 * @cm_node: connection's node 2948 */ 2949 static int 2950 irdma_cm_close(struct irdma_cm_node *cm_node) 2951 { 2952 switch (cm_node->state) { 2953 case IRDMA_CM_STATE_SYN_RCVD: 2954 case IRDMA_CM_STATE_SYN_SENT: 2955 case IRDMA_CM_STATE_ONE_SIDE_ESTABLISHED: 2956 case IRDMA_CM_STATE_ESTABLISHED: 2957 case IRDMA_CM_STATE_ACCEPTING: 2958 case IRDMA_CM_STATE_MPAREQ_SENT: 2959 case IRDMA_CM_STATE_MPAREQ_RCVD: 2960 irdma_cleanup_retrans_entry(cm_node); 2961 irdma_send_reset(cm_node); 2962 break; 2963 case IRDMA_CM_STATE_CLOSE_WAIT: 2964 cm_node->state = IRDMA_CM_STATE_LAST_ACK; 2965 irdma_send_fin(cm_node); 2966 break; 2967 case IRDMA_CM_STATE_FIN_WAIT1: 2968 case IRDMA_CM_STATE_FIN_WAIT2: 2969 case IRDMA_CM_STATE_LAST_ACK: 2970 case IRDMA_CM_STATE_TIME_WAIT: 2971 case IRDMA_CM_STATE_CLOSING: 2972 return -EINVAL; 2973 case IRDMA_CM_STATE_LISTENING: 2974 irdma_cleanup_retrans_entry(cm_node); 2975 irdma_send_reset(cm_node); 2976 break; 2977 case IRDMA_CM_STATE_MPAREJ_RCVD: 2978 case IRDMA_CM_STATE_UNKNOWN: 2979 case IRDMA_CM_STATE_INITED: 2980 case IRDMA_CM_STATE_CLOSED: 2981 case IRDMA_CM_STATE_LISTENER_DESTROYED: 2982 irdma_rem_ref_cm_node(cm_node); 2983 break; 2984 case IRDMA_CM_STATE_OFFLOADED: 2985 if (cm_node->send_entry) 2986 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2987 "CM send_entry in OFFLOADED state\n"); 2988 irdma_rem_ref_cm_node(cm_node); 2989 break; 2990 } 2991 2992 return 0; 2993 } 2994 2995 /** 2996 * irdma_receive_ilq - recv an ETHERNET packet, and process it 2997 * through CM 2998 * @vsi: VSI structure of dev 2999 * @rbuf: receive buffer 3000 */ 3001 void 3002 irdma_receive_ilq(struct irdma_sc_vsi *vsi, struct irdma_puda_buf *rbuf) 3003 { 3004 struct irdma_cm_node *cm_node; 3005 struct irdma_cm_listener *listener; 3006 struct ip *iph; 3007 struct ip6_hdr *ip6h; 3008 struct tcphdr *tcph; 3009 struct irdma_cm_info cm_info = {0}; 3010 struct irdma_device *iwdev = vsi->back_vsi; 3011 struct irdma_cm_core *cm_core = &iwdev->cm_core; 3012 struct ether_vlan_header *ethh; 3013 u16 vtag; 3014 3015 /* if vlan, then maclen = 18 else 14 */ 3016 iph = (struct ip *)rbuf->iph; 3017 irdma_debug_buf(vsi->dev, IRDMA_DEBUG_ILQ, "RECEIVE ILQ BUFFER", 3018 rbuf->mem.va, rbuf->totallen); 3019 if (iwdev->rf->sc_dev.hw_attrs.uk_attrs.hw_rev >= IRDMA_GEN_2) { 3020 if (rbuf->vlan_valid) { 3021 vtag = rbuf->vlan_id; 3022 cm_info.user_pri = (vtag & EVL_PRI_MASK) >> 3023 VLAN_PRIO_SHIFT; 3024 cm_info.vlan_id = vtag & EVL_VLID_MASK; 3025 } else { 3026 cm_info.vlan_id = 0xFFFF; 3027 } 3028 } else { 3029 ethh = rbuf->mem.va; 3030 3031 if (ethh->evl_proto == htons(ETH_P_8021Q)) { 3032 vtag = ntohs(ethh->evl_tag); 3033 cm_info.user_pri = (vtag & EVL_PRI_MASK) >> 3034 VLAN_PRIO_SHIFT; 3035 cm_info.vlan_id = vtag & EVL_VLID_MASK; 3036 irdma_debug(&cm_core->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3037 "vlan_id=%d\n", cm_info.vlan_id); 3038 } else { 3039 cm_info.vlan_id = 0xFFFF; 3040 } 3041 } 3042 tcph = (struct tcphdr *)rbuf->tcph; 3043 3044 if (rbuf->ipv4) { 3045 cm_info.loc_addr[0] = ntohl(iph->ip_dst.s_addr); 3046 cm_info.rem_addr[0] = ntohl(iph->ip_src.s_addr); 3047 cm_info.ipv4 = true; 3048 cm_info.tos = iph->ip_tos; 3049 } else { 3050 ip6h = (struct ip6_hdr *)rbuf->iph; 3051 irdma_copy_ip_ntohl(cm_info.loc_addr, 3052 ip6h->ip6_dst.__u6_addr.__u6_addr32); 3053 irdma_copy_ip_ntohl(cm_info.rem_addr, 3054 ip6h->ip6_src.__u6_addr.__u6_addr32); 3055 cm_info.ipv4 = false; 3056 cm_info.tos = (ip6h->ip6_vfc << 4) | ip6h->ip6_flow; 3057 } 3058 cm_info.loc_port = ntohs(tcph->th_dport); 3059 cm_info.rem_port = ntohs(tcph->th_sport); 3060 cm_node = irdma_find_node(cm_core, cm_info.rem_port, cm_info.rem_addr, 3061 cm_info.loc_port, cm_info.loc_addr, cm_info.vlan_id); 3062 3063 if (!cm_node) { 3064 /* 3065 * Only type of packet accepted are for the PASSIVE open (syn only) 3066 */ 3067 if (!(tcph->th_flags & TH_SYN) || tcph->th_flags & TH_ACK) 3068 return; 3069 3070 listener = irdma_find_listener(cm_core, 3071 cm_info.loc_addr, 3072 cm_info.ipv4, 3073 cm_info.loc_port, 3074 cm_info.vlan_id, 3075 IRDMA_CM_LISTENER_ACTIVE_STATE); 3076 if (!listener) { 3077 cm_info.cm_id = NULL; 3078 irdma_debug(&cm_core->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3079 "no listener found\n"); 3080 return; 3081 } 3082 3083 cm_info.cm_id = listener->cm_id; 3084 cm_node = irdma_make_cm_node(cm_core, iwdev, &cm_info, 3085 listener); 3086 if (!cm_node) { 3087 irdma_debug(&cm_core->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3088 "allocate node failed\n"); 3089 atomic_dec(&listener->refcnt); 3090 return; 3091 } 3092 3093 if (!(tcph->th_flags & (TH_RST | TH_FIN))) { 3094 cm_node->state = IRDMA_CM_STATE_LISTENING; 3095 } else { 3096 irdma_rem_ref_cm_node(cm_node); 3097 return; 3098 } 3099 3100 atomic_inc(&cm_node->refcnt); 3101 } else if (cm_node->state == IRDMA_CM_STATE_OFFLOADED) { 3102 irdma_rem_ref_cm_node(cm_node); 3103 return; 3104 } 3105 3106 irdma_process_pkt(cm_node, rbuf); 3107 irdma_rem_ref_cm_node(cm_node); 3108 } 3109 3110 static int 3111 irdma_add_qh(struct irdma_cm_node *cm_node, bool active) 3112 { 3113 if (!active) 3114 irdma_add_conn_est_qh(cm_node); 3115 return 0; 3116 } 3117 3118 static void 3119 irdma_cm_free_ah_nop(struct irdma_cm_node *cm_node) 3120 { 3121 } 3122 3123 /** 3124 * irdma_setup_cm_core - setup top level instance of a cm core 3125 * @iwdev: iwarp device structure 3126 * @rdma_ver: HW version 3127 */ 3128 int 3129 irdma_setup_cm_core(struct irdma_device *iwdev, u8 rdma_ver) 3130 { 3131 struct irdma_cm_core *cm_core = &iwdev->cm_core; 3132 3133 cm_core->iwdev = iwdev; 3134 cm_core->dev = &iwdev->rf->sc_dev; 3135 3136 /* Handles CM event work items send to Iwarp core */ 3137 cm_core->event_wq = alloc_ordered_workqueue("iwarp-event-wq", 0); 3138 if (!cm_core->event_wq) 3139 return -ENOMEM; 3140 3141 INIT_LIST_HEAD(&cm_core->listen_list); 3142 3143 timer_setup(&cm_core->tcp_timer, irdma_cm_timer_tick, 0); 3144 3145 spin_lock_init(&cm_core->ht_lock); 3146 spin_lock_init(&cm_core->listen_list_lock); 3147 spin_lock_init(&cm_core->apbvt_lock); 3148 switch (rdma_ver) { 3149 case IRDMA_GEN_1: 3150 cm_core->form_cm_frame = irdma_form_uda_cm_frame; 3151 cm_core->cm_create_ah = irdma_add_qh; 3152 cm_core->cm_free_ah = irdma_cm_free_ah_nop; 3153 break; 3154 case IRDMA_GEN_2: 3155 default: 3156 cm_core->form_cm_frame = irdma_form_ah_cm_frame; 3157 cm_core->cm_create_ah = irdma_cm_create_ah; 3158 cm_core->cm_free_ah = irdma_cm_free_ah; 3159 } 3160 3161 return 0; 3162 } 3163 3164 /** 3165 * irdma_cleanup_cm_core - deallocate a top level instance of a 3166 * cm core 3167 * @cm_core: cm's core 3168 */ 3169 void 3170 irdma_cleanup_cm_core(struct irdma_cm_core *cm_core) 3171 { 3172 if (!cm_core) 3173 return; 3174 3175 del_timer_sync(&cm_core->tcp_timer); 3176 3177 destroy_workqueue(cm_core->event_wq); 3178 cm_core->dev->ws_reset(&cm_core->iwdev->vsi); 3179 } 3180 3181 /** 3182 * irdma_init_tcp_ctx - setup qp context 3183 * @cm_node: connection's node 3184 * @tcp_info: offload info for tcp 3185 * @iwqp: associate qp for the connection 3186 */ 3187 static void 3188 irdma_init_tcp_ctx(struct irdma_cm_node *cm_node, 3189 struct irdma_tcp_offload_info *tcp_info, 3190 struct irdma_qp *iwqp) 3191 { 3192 tcp_info->ipv4 = cm_node->ipv4; 3193 tcp_info->drop_ooo_seg = !iwqp->iwdev->iw_ooo; 3194 tcp_info->wscale = true; 3195 tcp_info->ignore_tcp_opt = true; 3196 tcp_info->ignore_tcp_uns_opt = true; 3197 tcp_info->no_nagle = false; 3198 3199 tcp_info->ttl = IRDMA_DEFAULT_TTL; 3200 tcp_info->rtt_var = IRDMA_DEFAULT_RTT_VAR; 3201 tcp_info->ss_thresh = IRDMA_DEFAULT_SS_THRESH; 3202 tcp_info->rexmit_thresh = IRDMA_DEFAULT_REXMIT_THRESH; 3203 3204 tcp_info->tcp_state = IRDMA_TCP_STATE_ESTABLISHED; 3205 tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale; 3206 tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale; 3207 3208 tcp_info->snd_nxt = cm_node->tcp_cntxt.loc_seq_num; 3209 tcp_info->snd_wnd = cm_node->tcp_cntxt.snd_wnd; 3210 tcp_info->rcv_nxt = cm_node->tcp_cntxt.rcv_nxt; 3211 tcp_info->snd_max = cm_node->tcp_cntxt.loc_seq_num; 3212 3213 tcp_info->snd_una = cm_node->tcp_cntxt.loc_seq_num; 3214 tcp_info->cwnd = 2 * cm_node->tcp_cntxt.mss; 3215 tcp_info->snd_wl1 = cm_node->tcp_cntxt.rcv_nxt; 3216 tcp_info->snd_wl2 = cm_node->tcp_cntxt.loc_seq_num; 3217 tcp_info->max_snd_window = cm_node->tcp_cntxt.max_snd_wnd; 3218 tcp_info->rcv_wnd = cm_node->tcp_cntxt.rcv_wnd 3219 << cm_node->tcp_cntxt.rcv_wscale; 3220 3221 tcp_info->flow_label = 0; 3222 tcp_info->snd_mss = (u32)cm_node->tcp_cntxt.mss; 3223 tcp_info->tos = cm_node->tos; 3224 if (cm_node->vlan_id < VLAN_N_VID) { 3225 tcp_info->insert_vlan_tag = true; 3226 tcp_info->vlan_tag = cm_node->vlan_id; 3227 tcp_info->vlan_tag |= cm_node->user_pri << VLAN_PRIO_SHIFT; 3228 } 3229 tcp_info->src_port = cm_node->loc_port; 3230 tcp_info->dst_port = cm_node->rem_port; 3231 tcp_info->arp_idx = (u16)irdma_arp_table(iwqp->iwdev->rf, 3232 cm_node->rem_addr, NULL, 3233 IRDMA_ARP_RESOLVE); 3234 if (cm_node->ipv4) { 3235 tcp_info->dest_ip_addr[3] = cm_node->rem_addr[0]; 3236 tcp_info->local_ipaddr[3] = cm_node->loc_addr[0]; 3237 } else { 3238 memcpy(tcp_info->dest_ip_addr, cm_node->rem_addr, 3239 sizeof(tcp_info->dest_ip_addr)); 3240 memcpy(tcp_info->local_ipaddr, cm_node->loc_addr, 3241 sizeof(tcp_info->local_ipaddr)); 3242 } 3243 } 3244 3245 /** 3246 * irdma_cm_init_tsa_conn - setup qp for RTS 3247 * @iwqp: associate qp for the connection 3248 * @cm_node: connection's node 3249 */ 3250 static void 3251 irdma_cm_init_tsa_conn(struct irdma_qp *iwqp, 3252 struct irdma_cm_node *cm_node) 3253 { 3254 struct irdma_iwarp_offload_info *iwarp_info; 3255 struct irdma_qp_host_ctx_info *ctx_info; 3256 3257 iwarp_info = &iwqp->iwarp_info; 3258 ctx_info = &iwqp->ctx_info; 3259 3260 ctx_info->tcp_info = &iwqp->tcp_info; 3261 ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id; 3262 ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id; 3263 3264 iwarp_info->ord_size = cm_node->ord_size; 3265 iwarp_info->ird_size = cm_node->ird_size; 3266 iwarp_info->rd_en = true; 3267 iwarp_info->rdmap_ver = 1; 3268 iwarp_info->ddp_ver = 1; 3269 iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id; 3270 3271 ctx_info->tcp_info_valid = true; 3272 ctx_info->iwarp_info_valid = true; 3273 ctx_info->user_pri = cm_node->user_pri; 3274 3275 irdma_init_tcp_ctx(cm_node, &iwqp->tcp_info, iwqp); 3276 if (cm_node->snd_mark_en) { 3277 iwarp_info->snd_mark_en = true; 3278 iwarp_info->snd_mark_offset = (iwqp->tcp_info.snd_nxt & SNDMARKER_SEQNMASK) + 3279 cm_node->lsmm_size; 3280 } 3281 3282 cm_node->state = IRDMA_CM_STATE_OFFLOADED; 3283 iwqp->tcp_info.tcp_state = IRDMA_TCP_STATE_ESTABLISHED; 3284 iwqp->tcp_info.src_mac_addr_idx = iwqp->iwdev->mac_ip_table_idx; 3285 3286 if (cm_node->rcv_mark_en) { 3287 iwarp_info->rcv_mark_en = true; 3288 iwarp_info->align_hdrs = true; 3289 } 3290 3291 irdma_sc_qp_setctx(&iwqp->sc_qp, iwqp->host_ctx.va, ctx_info); 3292 3293 /* once tcp_info is set, no need to do it again */ 3294 ctx_info->tcp_info_valid = false; 3295 ctx_info->iwarp_info_valid = false; 3296 } 3297 3298 /** 3299 * irdma_cm_disconn - when a connection is being closed 3300 * @iwqp: associated qp for the connection 3301 */ 3302 void 3303 irdma_cm_disconn(struct irdma_qp *iwqp) 3304 { 3305 struct irdma_device *iwdev = iwqp->iwdev; 3306 struct disconn_work *work; 3307 unsigned long flags; 3308 3309 work = kzalloc(sizeof(*work), GFP_ATOMIC); 3310 if (!work) 3311 return; 3312 3313 spin_lock_irqsave(&iwdev->rf->qptable_lock, flags); 3314 if (!iwdev->rf->qp_table[iwqp->ibqp.qp_num]) { 3315 spin_unlock_irqrestore(&iwdev->rf->qptable_lock, flags); 3316 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3317 "qp_id %d is already freed\n", iwqp->ibqp.qp_num); 3318 kfree(work); 3319 return; 3320 } 3321 irdma_qp_add_ref(&iwqp->ibqp); 3322 spin_unlock_irqrestore(&iwdev->rf->qptable_lock, flags); 3323 3324 work->iwqp = iwqp; 3325 INIT_WORK(&work->work, irdma_disconnect_worker); 3326 queue_work(iwdev->cleanup_wq, &work->work); 3327 } 3328 3329 /** 3330 * irdma_qp_disconnect - free qp and close cm 3331 * @iwqp: associate qp for the connection 3332 */ 3333 static void 3334 irdma_qp_disconnect(struct irdma_qp *iwqp) 3335 { 3336 struct irdma_device *iwdev = iwqp->iwdev; 3337 3338 iwqp->active_conn = 0; 3339 /* close the CM node down if it is still active */ 3340 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, "Call close API\n"); 3341 irdma_cm_close(iwqp->cm_node); 3342 } 3343 3344 /** 3345 * irdma_cm_disconn_true - called by worker thread to disconnect qp 3346 * @iwqp: associate qp for the connection 3347 */ 3348 static void 3349 irdma_cm_disconn_true(struct irdma_qp *iwqp) 3350 { 3351 struct iw_cm_id *cm_id; 3352 struct irdma_device *iwdev; 3353 struct irdma_sc_qp *qp = &iwqp->sc_qp; 3354 u16 last_ae; 3355 u8 original_hw_tcp_state; 3356 u8 original_ibqp_state; 3357 int disconn_status = 0; 3358 int issue_disconn = 0; 3359 int issue_close = 0; 3360 int issue_flush = 0; 3361 unsigned long flags; 3362 int err; 3363 3364 iwdev = iwqp->iwdev; 3365 spin_lock_irqsave(&iwqp->lock, flags); 3366 if (rdma_protocol_roce(&iwdev->ibdev, 1)) { 3367 struct ib_qp_attr attr; 3368 3369 if (iwqp->flush_issued || iwqp->sc_qp.qp_uk.destroy_pending) { 3370 spin_unlock_irqrestore(&iwqp->lock, flags); 3371 return; 3372 } 3373 3374 spin_unlock_irqrestore(&iwqp->lock, flags); 3375 3376 attr.qp_state = IB_QPS_ERR; 3377 irdma_modify_qp_roce(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); 3378 irdma_ib_qp_event(iwqp, qp->event_type); 3379 return; 3380 } 3381 3382 cm_id = iwqp->cm_id; 3383 original_hw_tcp_state = iwqp->hw_tcp_state; 3384 original_ibqp_state = iwqp->ibqp_state; 3385 last_ae = iwqp->last_aeq; 3386 3387 if (qp->term_flags) { 3388 issue_disconn = 1; 3389 issue_close = 1; 3390 iwqp->cm_id = NULL; 3391 irdma_terminate_del_timer(qp); 3392 if (!iwqp->flush_issued) { 3393 iwqp->flush_issued = 1; 3394 issue_flush = 1; 3395 } 3396 } else if ((original_hw_tcp_state == IRDMA_TCP_STATE_CLOSE_WAIT) || 3397 ((original_ibqp_state == IB_QPS_RTS) && 3398 (last_ae == IRDMA_AE_LLP_CONNECTION_RESET))) { 3399 issue_disconn = 1; 3400 if (last_ae == IRDMA_AE_LLP_CONNECTION_RESET) 3401 disconn_status = -ECONNRESET; 3402 } 3403 3404 if (original_hw_tcp_state == IRDMA_TCP_STATE_CLOSED || 3405 original_hw_tcp_state == IRDMA_TCP_STATE_TIME_WAIT || 3406 last_ae == IRDMA_AE_RDMAP_ROE_BAD_LLP_CLOSE || 3407 last_ae == IRDMA_AE_BAD_CLOSE || 3408 last_ae == IRDMA_AE_LLP_CONNECTION_RESET || iwdev->rf->reset || !cm_id) { 3409 issue_close = 1; 3410 iwqp->cm_id = NULL; 3411 qp->term_flags = 0; 3412 if (!iwqp->flush_issued) { 3413 iwqp->flush_issued = 1; 3414 issue_flush = 1; 3415 } 3416 } 3417 3418 spin_unlock_irqrestore(&iwqp->lock, flags); 3419 if (issue_flush && !iwqp->sc_qp.qp_uk.destroy_pending) { 3420 irdma_flush_wqes(iwqp, IRDMA_FLUSH_SQ | IRDMA_FLUSH_RQ | 3421 IRDMA_FLUSH_WAIT); 3422 3423 if (qp->term_flags) 3424 irdma_ib_qp_event(iwqp, qp->event_type); 3425 } 3426 3427 if (!cm_id || !cm_id->event_handler) 3428 return; 3429 3430 spin_lock_irqsave(&iwdev->cm_core.ht_lock, flags); 3431 if (!iwqp->cm_node) { 3432 spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags); 3433 return; 3434 } 3435 atomic_inc(&iwqp->cm_node->refcnt); 3436 3437 spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags); 3438 3439 if (issue_disconn) { 3440 err = irdma_send_cm_event(iwqp->cm_node, cm_id, 3441 IW_CM_EVENT_DISCONNECT, 3442 disconn_status); 3443 if (err) 3444 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3445 "disconnect event failed: - cm_id = %p\n", 3446 cm_id); 3447 } 3448 if (issue_close) { 3449 cm_id->provider_data = iwqp; 3450 err = irdma_send_cm_event(iwqp->cm_node, cm_id, 3451 IW_CM_EVENT_CLOSE, 0); 3452 if (err) 3453 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3454 "close event failed: - cm_id = %p\n", 3455 cm_id); 3456 irdma_qp_disconnect(iwqp); 3457 } 3458 irdma_rem_ref_cm_node(iwqp->cm_node); 3459 } 3460 3461 /** 3462 * irdma_disconnect_worker - worker for connection close 3463 * @work: points or disconn structure 3464 */ 3465 static void 3466 irdma_disconnect_worker(struct work_struct *work) 3467 { 3468 struct disconn_work *dwork = container_of(work, struct disconn_work, work); 3469 struct irdma_qp *iwqp = dwork->iwqp; 3470 3471 kfree(dwork); 3472 irdma_cm_disconn_true(iwqp); 3473 irdma_qp_rem_ref(&iwqp->ibqp); 3474 } 3475 3476 /** 3477 * irdma_free_lsmm_rsrc - free lsmm memory and deregister 3478 * @iwqp: associate qp for the connection 3479 */ 3480 void 3481 irdma_free_lsmm_rsrc(struct irdma_qp *iwqp) 3482 { 3483 struct irdma_device *iwdev; 3484 3485 iwdev = iwqp->iwdev; 3486 3487 if (iwqp->ietf_mem.va) { 3488 if (iwqp->lsmm_mr) 3489 iwdev->ibdev.dereg_mr(iwqp->lsmm_mr, NULL); 3490 3491 irdma_free_dma_mem(iwdev->rf->sc_dev.hw, 3492 &iwqp->ietf_mem); 3493 iwqp->ietf_mem.va = NULL; 3494 } 3495 } 3496 3497 /** 3498 * irdma_accept - registered call for connection to be accepted 3499 * @cm_id: cm information for passive connection 3500 * @conn_param: accpet parameters 3501 */ 3502 int 3503 irdma_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) 3504 { 3505 struct ib_qp *ibqp; 3506 struct irdma_qp *iwqp; 3507 struct irdma_device *iwdev; 3508 struct irdma_sc_dev *dev; 3509 struct irdma_cm_node *cm_node; 3510 struct ib_qp_attr attr = {0}; 3511 int passive_state; 3512 struct ib_mr *ibmr; 3513 struct irdma_pd *iwpd; 3514 u16 buf_len = 0; 3515 struct irdma_kmem_info accept; 3516 u64 tagged_offset; 3517 int wait_ret; 3518 int ret = 0; 3519 3520 ibqp = irdma_get_qp(cm_id->device, conn_param->qpn); 3521 if (!ibqp) 3522 return -EINVAL; 3523 3524 iwqp = to_iwqp(ibqp); 3525 iwdev = iwqp->iwdev; 3526 dev = &iwdev->rf->sc_dev; 3527 cm_node = cm_id->provider_data; 3528 3529 if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) { 3530 cm_node->ipv4 = true; 3531 cm_node->vlan_id = irdma_get_vlan_ipv4(cm_id, cm_node->loc_addr); 3532 } else { 3533 cm_node->ipv4 = false; 3534 irdma_get_vlan_mac_ipv6(cm_id, cm_node->loc_addr, &cm_node->vlan_id, 3535 NULL); 3536 } 3537 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, "Accept vlan_id=%d\n", 3538 cm_node->vlan_id); 3539 3540 if (cm_node->state == IRDMA_CM_STATE_LISTENER_DESTROYED) { 3541 ret = -EINVAL; 3542 goto error; 3543 } 3544 3545 passive_state = atomic_add_return(1, &cm_node->passive_state); 3546 if (passive_state == IRDMA_SEND_RESET_EVENT) { 3547 ret = -ECONNRESET; 3548 goto error; 3549 } 3550 3551 buf_len = conn_param->private_data_len + IRDMA_MAX_IETF_SIZE; 3552 iwqp->ietf_mem.size = buf_len; 3553 iwqp->ietf_mem.va = irdma_allocate_dma_mem(dev->hw, &iwqp->ietf_mem, 3554 iwqp->ietf_mem.size, 1); 3555 if (!iwqp->ietf_mem.va) { 3556 ret = -ENOMEM; 3557 goto error; 3558 } 3559 3560 cm_node->pdata.size = conn_param->private_data_len; 3561 accept.addr = iwqp->ietf_mem.va; 3562 accept.size = irdma_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY); 3563 memcpy((u8 *)accept.addr + accept.size, conn_param->private_data, 3564 conn_param->private_data_len); 3565 3566 if (cm_node->dev->ws_add(iwqp->sc_qp.vsi, cm_node->user_pri)) { 3567 ret = -ENOMEM; 3568 goto error; 3569 } 3570 iwqp->sc_qp.user_pri = cm_node->user_pri; 3571 irdma_qp_add_qos(&iwqp->sc_qp); 3572 if (cm_node->dev->hw_attrs.uk_attrs.hw_rev == IRDMA_GEN_2) 3573 iwdev->rf->check_fc(&iwdev->vsi, &iwqp->sc_qp); 3574 /* setup our first outgoing iWarp send WQE (the IETF frame response) */ 3575 iwpd = iwqp->iwpd; 3576 tagged_offset = (uintptr_t)iwqp->ietf_mem.va; 3577 ibmr = irdma_reg_phys_mr(&iwpd->ibpd, iwqp->ietf_mem.pa, buf_len, 3578 IB_ACCESS_LOCAL_WRITE, &tagged_offset); 3579 if (IS_ERR(ibmr)) { 3580 ret = -ENOMEM; 3581 goto error; 3582 } 3583 3584 ibmr->pd = &iwpd->ibpd; 3585 ibmr->device = iwpd->ibpd.device; 3586 iwqp->lsmm_mr = ibmr; 3587 if (iwqp->page) 3588 iwqp->sc_qp.qp_uk.sq_base = kmap_local_page(iwqp->page); 3589 3590 cm_node->lsmm_size = accept.size + conn_param->private_data_len; 3591 irdma_sc_send_lsmm(&iwqp->sc_qp, iwqp->ietf_mem.va, cm_node->lsmm_size, 3592 ibmr->lkey); 3593 3594 if (iwqp->page) 3595 kunmap_local(iwqp->sc_qp.qp_uk.sq_base); 3596 3597 iwqp->cm_id = cm_id; 3598 cm_node->cm_id = cm_id; 3599 3600 cm_id->provider_data = iwqp; 3601 iwqp->active_conn = 0; 3602 iwqp->cm_node = cm_node; 3603 cm_node->iwqp = iwqp; 3604 irdma_cm_init_tsa_conn(iwqp, cm_node); 3605 irdma_qp_add_ref(&iwqp->ibqp); 3606 cm_id->add_ref(cm_id); 3607 3608 attr.qp_state = IB_QPS_RTS; 3609 cm_node->qhash_set = false; 3610 cm_node->cm_core->cm_free_ah(cm_node); 3611 3612 irdma_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); 3613 if (dev->hw_attrs.uk_attrs.feature_flags & IRDMA_FEATURE_RTS_AE) { 3614 wait_ret = wait_event_interruptible_timeout(iwqp->waitq, 3615 iwqp->rts_ae_rcvd, 3616 IRDMA_MAX_TIMEOUT); 3617 if (!wait_ret) { 3618 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3619 "Slow Connection: cm_node=%p, loc_port=%d, rem_port=%d, cm_id=%p\n", 3620 cm_node, cm_node->loc_port, 3621 cm_node->rem_port, cm_node->cm_id); 3622 ret = -ECONNRESET; 3623 goto error; 3624 } 3625 } 3626 3627 irdma_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0); 3628 cm_node->accelerated = true; 3629 complete(&cm_node->establish_comp); 3630 3631 if (cm_node->accept_pend) { 3632 atomic_dec(&cm_node->listener->pend_accepts_cnt); 3633 cm_node->accept_pend = 0; 3634 } 3635 3636 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3637 "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", 3638 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr[0], 3639 cm_node->loc_addr[0], cm_node, cm_id, ibqp->qp_num); 3640 cm_node->cm_core->stats_accepts++; 3641 3642 return 0; 3643 error: 3644 irdma_free_lsmm_rsrc(iwqp); 3645 irdma_rem_ref_cm_node(cm_node); 3646 3647 return ret; 3648 } 3649 3650 /** 3651 * irdma_reject - registered call for connection to be rejected 3652 * @cm_id: cm information for passive connection 3653 * @pdata: private data to be sent 3654 * @pdata_len: private data length 3655 */ 3656 int 3657 irdma_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len) 3658 { 3659 struct irdma_device *iwdev; 3660 struct irdma_cm_node *cm_node; 3661 3662 cm_node = cm_id->provider_data; 3663 cm_node->pdata.size = pdata_len; 3664 3665 iwdev = to_iwdev(cm_id->device); 3666 if (!iwdev) 3667 return -EINVAL; 3668 3669 cm_node->cm_core->stats_rejects++; 3670 3671 if (pdata_len + sizeof(struct ietf_mpa_v2) > IRDMA_MAX_CM_BUF) 3672 return -EINVAL; 3673 3674 return irdma_cm_reject(cm_node, pdata, pdata_len); 3675 } 3676 3677 /** 3678 * irdma_connect - registered call for connection to be established 3679 * @cm_id: cm information for passive connection 3680 * @conn_param: Information about the connection 3681 */ 3682 int 3683 irdma_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) 3684 { 3685 struct ib_qp *ibqp; 3686 struct irdma_qp *iwqp; 3687 struct irdma_device *iwdev; 3688 struct irdma_cm_node *cm_node; 3689 struct irdma_cm_info cm_info; 3690 struct sockaddr_in *laddr; 3691 struct sockaddr_in *raddr; 3692 struct sockaddr_in6 *laddr6; 3693 struct sockaddr_in6 *raddr6; 3694 int ret = 0; 3695 3696 ibqp = irdma_get_qp(cm_id->device, conn_param->qpn); 3697 if (!ibqp) 3698 return -EINVAL; 3699 iwqp = to_iwqp(ibqp); 3700 if (!iwqp) 3701 return -EINVAL; 3702 iwdev = iwqp->iwdev; 3703 if (!iwdev) 3704 return -EINVAL; 3705 3706 laddr = (struct sockaddr_in *)&cm_id->m_local_addr; 3707 raddr = (struct sockaddr_in *)&cm_id->m_remote_addr; 3708 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr; 3709 raddr6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr; 3710 3711 if (!(laddr->sin_port) || !(raddr->sin_port)) 3712 return -EINVAL; 3713 3714 iwqp->active_conn = 1; 3715 iwqp->cm_id = NULL; 3716 cm_id->provider_data = iwqp; 3717 3718 /* set up the connection params for the node */ 3719 if (cm_id->remote_addr.ss_family == AF_INET) { 3720 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV4) 3721 return -EINVAL; 3722 3723 cm_info.ipv4 = true; 3724 memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr)); 3725 memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr)); 3726 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr); 3727 cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr); 3728 cm_info.loc_port = ntohs(laddr->sin_port); 3729 cm_info.rem_port = ntohs(raddr->sin_port); 3730 cm_info.vlan_id = irdma_get_vlan_ipv4(cm_id, cm_info.loc_addr); 3731 } else { 3732 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV6) 3733 return -EINVAL; 3734 3735 cm_info.ipv4 = false; 3736 irdma_copy_ip_ntohl(cm_info.loc_addr, 3737 laddr6->sin6_addr.__u6_addr.__u6_addr32); 3738 irdma_copy_ip_ntohl(cm_info.rem_addr, 3739 raddr6->sin6_addr.__u6_addr.__u6_addr32); 3740 cm_info.loc_port = ntohs(laddr6->sin6_port); 3741 cm_info.rem_port = ntohs(raddr6->sin6_port); 3742 irdma_get_vlan_mac_ipv6(cm_id, cm_info.loc_addr, &cm_info.vlan_id, NULL); 3743 } 3744 cm_info.cm_id = cm_id; 3745 cm_info.qh_qpid = iwdev->vsi.ilq->qp_id; 3746 cm_info.tos = cm_id->tos; 3747 if (iwdev->vsi.dscp_mode) { 3748 cm_info.user_pri = 3749 iwqp->sc_qp.vsi->dscp_map[irdma_tos2dscp(cm_info.tos)]; 3750 } else { 3751 cm_info.user_pri = rt_tos2priority(cm_id->tos); 3752 cm_info.user_pri = 3753 irdma_iw_get_vlan_prio(cm_info.loc_addr, 3754 cm_info.user_pri, 3755 cm_info.ipv4); 3756 } 3757 3758 if (iwqp->sc_qp.dev->ws_add(iwqp->sc_qp.vsi, cm_info.user_pri)) 3759 return -ENOMEM; 3760 iwqp->sc_qp.user_pri = cm_info.user_pri; 3761 irdma_qp_add_qos(&iwqp->sc_qp); 3762 if (iwdev->rf->sc_dev.hw_attrs.uk_attrs.hw_rev == IRDMA_GEN_2) 3763 iwdev->rf->check_fc(&iwdev->vsi, &iwqp->sc_qp); 3764 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_DCB, "TOS:[%d] UP:[%d]\n", 3765 cm_id->tos, cm_info.user_pri); 3766 3767 ret = irdma_create_cm_node(&iwdev->cm_core, iwdev, conn_param, &cm_info, 3768 &cm_node); 3769 if (ret) 3770 return ret; 3771 ret = cm_node->cm_core->cm_create_ah(cm_node, true); 3772 if (ret) 3773 goto err; 3774 if (irdma_manage_qhash(iwdev, &cm_info, 3775 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 3776 IRDMA_QHASH_MANAGE_TYPE_ADD, NULL, true)) { 3777 ret = -EINVAL; 3778 goto err; 3779 } 3780 cm_node->qhash_set = true; 3781 3782 cm_node->apbvt_entry = irdma_add_apbvt(iwdev, cm_info.loc_port); 3783 if (!cm_node->apbvt_entry) { 3784 ret = -EINVAL; 3785 goto err; 3786 } 3787 3788 cm_node->apbvt_set = true; 3789 iwqp->cm_node = cm_node; 3790 cm_node->iwqp = iwqp; 3791 iwqp->cm_id = cm_id; 3792 irdma_qp_add_ref(&iwqp->ibqp); 3793 cm_id->add_ref(cm_id); 3794 3795 if (cm_node->state != IRDMA_CM_STATE_OFFLOADED) { 3796 cm_node->state = IRDMA_CM_STATE_SYN_SENT; 3797 ret = irdma_send_syn(cm_node, 0); 3798 if (ret) 3799 goto err; 3800 } 3801 3802 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3803 "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", 3804 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr[0], 3805 cm_node->loc_addr[0], cm_node, cm_id, ibqp->qp_num); 3806 3807 return 0; 3808 3809 err: 3810 if (cm_info.ipv4) 3811 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3812 "connect() FAILED: dest addr=%x", 3813 cm_info.rem_addr[0]); 3814 else 3815 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3816 "connect() FAILED: dest addr=%x:%x:%x:%x", 3817 IRDMA_PRINT_IP6(cm_info.rem_addr)); 3818 irdma_rem_ref_cm_node(cm_node); 3819 iwdev->cm_core.stats_connect_errs++; 3820 3821 return ret; 3822 } 3823 3824 /** 3825 * irdma_create_listen - registered call creating listener 3826 * @cm_id: cm information for passive connection 3827 * @backlog: to max accept pending count 3828 */ 3829 int 3830 irdma_create_listen(struct iw_cm_id *cm_id, int backlog) 3831 { 3832 struct irdma_device *iwdev; 3833 struct irdma_cm_listener *cm_listen_node; 3834 struct irdma_cm_info cm_info = {0}; 3835 struct sockaddr_in *laddr; 3836 struct sockaddr_in6 *laddr6; 3837 bool wildcard = false; 3838 int err; 3839 3840 iwdev = to_iwdev(cm_id->device); 3841 if (!iwdev) 3842 return -EINVAL; 3843 3844 laddr = (struct sockaddr_in *)&cm_id->m_local_addr; 3845 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr; 3846 cm_info.qh_qpid = iwdev->vsi.ilq->qp_id; 3847 3848 if (laddr->sin_family == AF_INET) { 3849 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV4) 3850 return -EINVAL; 3851 3852 cm_info.ipv4 = true; 3853 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr); 3854 cm_info.loc_port = ntohs(laddr->sin_port); 3855 3856 if (laddr->sin_addr.s_addr != htonl(INADDR_ANY)) { 3857 cm_info.vlan_id = irdma_get_vlan_ipv4(cm_id, cm_info.loc_addr); 3858 } else { 3859 cm_info.vlan_id = 0xFFFF; 3860 wildcard = true; 3861 } 3862 } else { 3863 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV6) 3864 return -EINVAL; 3865 3866 cm_info.ipv4 = false; 3867 irdma_copy_ip_ntohl(cm_info.loc_addr, 3868 laddr6->sin6_addr.__u6_addr.__u6_addr32); 3869 cm_info.loc_port = ntohs(laddr6->sin6_port); 3870 if (!IN6_IS_ADDR_UNSPECIFIED(&laddr6->sin6_addr)) { 3871 irdma_get_vlan_mac_ipv6(cm_id, cm_info.loc_addr, 3872 &cm_info.vlan_id, NULL); 3873 } else { 3874 cm_info.vlan_id = 0xFFFF; 3875 wildcard = true; 3876 } 3877 } 3878 3879 if (cm_info.vlan_id >= VLAN_N_VID && iwdev->dcb_vlan_mode) 3880 cm_info.vlan_id = 0; 3881 cm_info.backlog = backlog; 3882 cm_info.cm_id = cm_id; 3883 3884 cm_listen_node = irdma_make_listen_node(&iwdev->cm_core, iwdev, 3885 &cm_info); 3886 if (!cm_listen_node) { 3887 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3888 "cm_listen_node == NULL\n"); 3889 return -ENOMEM; 3890 } 3891 3892 cm_id->provider_data = cm_listen_node; 3893 3894 cm_listen_node->tos = cm_id->tos; 3895 if (iwdev->vsi.dscp_mode) 3896 cm_listen_node->user_pri = 3897 iwdev->vsi.dscp_map[irdma_tos2dscp(cm_id->tos)]; 3898 else 3899 cm_listen_node->user_pri = rt_tos2priority(cm_id->tos); 3900 cm_info.user_pri = cm_listen_node->user_pri; 3901 if (!cm_listen_node->reused_node) { 3902 if (wildcard) { 3903 err = irdma_add_mqh(iwdev, &cm_info, cm_listen_node); 3904 if (err) 3905 goto error; 3906 } else { 3907 if (!iwdev->vsi.dscp_mode) 3908 cm_info.user_pri = cm_listen_node->user_pri = 3909 irdma_iw_get_vlan_prio(cm_info.loc_addr, 3910 cm_info.user_pri, 3911 cm_info.ipv4); 3912 err = irdma_manage_qhash(iwdev, &cm_info, 3913 IRDMA_QHASH_TYPE_TCP_SYN, 3914 IRDMA_QHASH_MANAGE_TYPE_ADD, 3915 NULL, true); 3916 if (err) 3917 goto error; 3918 3919 cm_listen_node->qhash_set = true; 3920 } 3921 3922 cm_listen_node->apbvt_entry = irdma_add_apbvt(iwdev, 3923 cm_info.loc_port); 3924 if (!cm_listen_node->apbvt_entry) 3925 goto error; 3926 } 3927 cm_id->add_ref(cm_id); 3928 cm_listen_node->cm_core->stats_listen_created++; 3929 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3930 "loc_port=0x%04x loc_addr=%x cm_listen_node=%p cm_id=%p qhash_set=%d vlan_id=%d\n", 3931 cm_listen_node->loc_port, cm_listen_node->loc_addr[0], 3932 cm_listen_node, cm_listen_node->cm_id, 3933 cm_listen_node->qhash_set, cm_listen_node->vlan_id); 3934 3935 return 0; 3936 3937 error: 3938 3939 irdma_cm_del_listen(&iwdev->cm_core, cm_listen_node, false); 3940 3941 return -EINVAL; 3942 } 3943 3944 /** 3945 * irdma_destroy_listen - registered call to destroy listener 3946 * @cm_id: cm information for passive connection 3947 */ 3948 int 3949 irdma_destroy_listen(struct iw_cm_id *cm_id) 3950 { 3951 struct irdma_device *iwdev; 3952 3953 iwdev = to_iwdev(cm_id->device); 3954 if (cm_id->provider_data) 3955 irdma_cm_del_listen(&iwdev->cm_core, cm_id->provider_data, 3956 true); 3957 else 3958 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3959 "cm_id->provider_data was NULL\n"); 3960 3961 cm_id->rem_ref(cm_id); 3962 3963 return 0; 3964 } 3965 3966 /** 3967 * irdma_iw_teardown_list_prep - add conn nodes slated for tear 3968 * down to list 3969 * @cm_core: cm's core 3970 * @teardown_list: a list to which cm_node will be selected 3971 * @ipaddr: pointer to ip address 3972 * @nfo: pointer to cm_info structure instance 3973 * @disconnect_all: flag indicating disconnect all QPs 3974 */ 3975 static void 3976 irdma_iw_teardown_list_prep(struct irdma_cm_core *cm_core, 3977 struct list_head *teardown_list, 3978 u32 *ipaddr, 3979 struct irdma_cm_info *nfo, 3980 bool disconnect_all) 3981 { 3982 struct irdma_cm_node *cm_node; 3983 int bkt; 3984 3985 HASH_FOR_EACH_RCU(cm_core->cm_hash_tbl, bkt, cm_node, list) { 3986 if ((disconnect_all || 3987 (nfo->vlan_id == cm_node->vlan_id && 3988 !memcmp(cm_node->loc_addr, ipaddr, nfo->ipv4 ? 4 : 16))) && 3989 atomic_inc_not_zero(&cm_node->refcnt)) 3990 list_add(&cm_node->teardown_entry, teardown_list); 3991 } 3992 } 3993 3994 static inline bool 3995 irdma_ip_vlan_match(u32 *ip1, u16 vlan_id1, 3996 bool check_vlan, u32 *ip2, 3997 u16 vlan_id2, bool ipv4) 3998 { 3999 return (!check_vlan || vlan_id1 == vlan_id2) && 4000 !memcmp(ip1, ip2, ipv4 ? 4 : 16); 4001 } 4002 4003 /** 4004 * irdma_roce_teardown_list_prep - add conn nodes slated for 4005 * tear down to list 4006 * @iwdev: RDMA device 4007 * @teardown_list: a list to which cm_node will be selected 4008 * @ipaddr: pointer to ip address 4009 * @nfo: pointer to cm_info structure instance 4010 * @disconnect_all: flag indicating disconnect all QPs 4011 */ 4012 static void 4013 irdma_roce_teardown_list_prep(struct irdma_device *iwdev, 4014 struct list_head *teardown_list, 4015 u32 *ipaddr, 4016 struct irdma_cm_info *nfo, 4017 bool disconnect_all) 4018 { 4019 struct irdma_sc_vsi *vsi = &iwdev->vsi; 4020 struct irdma_sc_qp *sc_qp; 4021 struct list_head *list_node; 4022 struct irdma_qp *qp; 4023 unsigned long flags; 4024 int i; 4025 4026 for (i = 0; i < IRDMA_MAX_USER_PRIORITY; i++) { 4027 mutex_lock(&vsi->qos[i].qos_mutex); 4028 list_for_each(list_node, &vsi->qos[i].qplist) { 4029 u32 qp_ip[4]; 4030 4031 sc_qp = container_of(list_node, struct irdma_sc_qp, 4032 list); 4033 if (sc_qp->qp_uk.qp_type != IRDMA_QP_TYPE_ROCE_RC) 4034 continue; 4035 4036 qp = sc_qp->qp_uk.back_qp; 4037 if (!disconnect_all) { 4038 if (nfo->ipv4) 4039 qp_ip[0] = qp->udp_info.local_ipaddr[3]; 4040 else 4041 memcpy(qp_ip, 4042 &qp->udp_info.local_ipaddr[0], 4043 sizeof(qp_ip)); 4044 } 4045 4046 if (disconnect_all || 4047 irdma_ip_vlan_match(qp_ip, 4048 qp->udp_info.vlan_tag & EVL_VLID_MASK, 4049 qp->udp_info.insert_vlan_tag, 4050 ipaddr, nfo->vlan_id, nfo->ipv4)) { 4051 spin_lock_irqsave(&iwdev->rf->qptable_lock, flags); 4052 if (iwdev->rf->qp_table[sc_qp->qp_uk.qp_id]) { 4053 irdma_qp_add_ref(&qp->ibqp); 4054 list_add(&qp->teardown_entry, teardown_list); 4055 } 4056 spin_unlock_irqrestore(&iwdev->rf->qptable_lock, flags); 4057 } 4058 } 4059 mutex_unlock(&vsi->qos[i].qos_mutex); 4060 } 4061 } 4062 4063 /** 4064 * irdma_cm_event_connected - handle connected active node 4065 * @event: the info for cm_node of connection 4066 */ 4067 static void 4068 irdma_cm_event_connected(struct irdma_cm_event *event) 4069 { 4070 struct irdma_qp *iwqp; 4071 struct irdma_device *iwdev; 4072 struct irdma_cm_node *cm_node; 4073 struct irdma_sc_dev *dev; 4074 struct ib_qp_attr attr = {0}; 4075 struct iw_cm_id *cm_id; 4076 int status; 4077 bool read0; 4078 int wait_ret = 0; 4079 4080 cm_node = event->cm_node; 4081 cm_id = cm_node->cm_id; 4082 iwqp = cm_id->provider_data; 4083 iwdev = iwqp->iwdev; 4084 dev = &iwdev->rf->sc_dev; 4085 if (iwqp->sc_qp.qp_uk.destroy_pending) { 4086 status = -ETIMEDOUT; 4087 goto error; 4088 } 4089 4090 irdma_cm_init_tsa_conn(iwqp, cm_node); 4091 read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO); 4092 if (iwqp->page) 4093 iwqp->sc_qp.qp_uk.sq_base = kmap_local_page(iwqp->page); 4094 irdma_sc_send_rtt(&iwqp->sc_qp, read0); 4095 if (iwqp->page) 4096 kunmap_local(iwqp->sc_qp.qp_uk.sq_base); 4097 4098 attr.qp_state = IB_QPS_RTS; 4099 cm_node->qhash_set = false; 4100 irdma_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); 4101 if (dev->hw_attrs.uk_attrs.feature_flags & IRDMA_FEATURE_RTS_AE) { 4102 wait_ret = wait_event_interruptible_timeout(iwqp->waitq, 4103 iwqp->rts_ae_rcvd, 4104 IRDMA_MAX_TIMEOUT); 4105 if (!wait_ret) 4106 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 4107 "Slow Connection: cm_node=%p, loc_port=%d, rem_port=%d, cm_id=%p\n", 4108 cm_node, cm_node->loc_port, 4109 cm_node->rem_port, cm_node->cm_id); 4110 } 4111 4112 irdma_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 0); 4113 cm_node->accelerated = true; 4114 complete(&cm_node->establish_comp); 4115 cm_node->cm_core->cm_free_ah(cm_node); 4116 return; 4117 4118 error: 4119 iwqp->cm_id = NULL; 4120 cm_id->provider_data = NULL; 4121 irdma_send_cm_event(event->cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 4122 status); 4123 irdma_rem_ref_cm_node(event->cm_node); 4124 } 4125 4126 /** 4127 * irdma_cm_event_reset - handle reset 4128 * @event: the info for cm_node of connection 4129 */ 4130 static void 4131 irdma_cm_event_reset(struct irdma_cm_event *event) 4132 { 4133 struct irdma_cm_node *cm_node = event->cm_node; 4134 struct iw_cm_id *cm_id = cm_node->cm_id; 4135 struct irdma_qp *iwqp; 4136 4137 if (!cm_id) 4138 return; 4139 4140 iwqp = cm_id->provider_data; 4141 if (!iwqp) 4142 return; 4143 4144 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 4145 "reset event %p - cm_id = %p\n", event->cm_node, cm_id); 4146 iwqp->cm_id = NULL; 4147 4148 irdma_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT, 4149 -ECONNRESET); 4150 irdma_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0); 4151 } 4152 4153 /** 4154 * irdma_cm_event_handler - send event to cm upper layer 4155 * @work: pointer of cm event info. 4156 */ 4157 static void 4158 irdma_cm_event_handler(struct work_struct *work) 4159 { 4160 struct irdma_cm_event *event = container_of(work, struct irdma_cm_event, event_work); 4161 struct irdma_cm_node *cm_node; 4162 4163 if (!event || !event->cm_node || !event->cm_node->cm_core) 4164 return; 4165 4166 cm_node = event->cm_node; 4167 4168 switch (event->type) { 4169 case IRDMA_CM_EVENT_MPA_REQ: 4170 irdma_send_cm_event(cm_node, cm_node->cm_id, 4171 IW_CM_EVENT_CONNECT_REQUEST, 0); 4172 break; 4173 case IRDMA_CM_EVENT_RESET: 4174 irdma_cm_event_reset(event); 4175 break; 4176 case IRDMA_CM_EVENT_CONNECTED: 4177 if (!event->cm_node->cm_id || 4178 event->cm_node->state != IRDMA_CM_STATE_OFFLOADED) 4179 break; 4180 irdma_cm_event_connected(event); 4181 break; 4182 case IRDMA_CM_EVENT_MPA_REJECT: 4183 if (!event->cm_node->cm_id || 4184 cm_node->state == IRDMA_CM_STATE_OFFLOADED) 4185 break; 4186 irdma_send_cm_event(cm_node, cm_node->cm_id, 4187 IW_CM_EVENT_CONNECT_REPLY, -ECONNREFUSED); 4188 break; 4189 case IRDMA_CM_EVENT_ABORTED: 4190 if (!event->cm_node->cm_id || 4191 event->cm_node->state == IRDMA_CM_STATE_OFFLOADED) 4192 break; 4193 irdma_event_connect_error(event); 4194 break; 4195 default: 4196 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 4197 "bad event type = %d\n", event->type); 4198 break; 4199 } 4200 4201 irdma_rem_ref_cm_node(event->cm_node); 4202 kfree(event); 4203 } 4204 4205 /** 4206 * irdma_cm_post_event - queue event request for worker thread 4207 * @event: cm node's info for up event call 4208 */ 4209 static void 4210 irdma_cm_post_event(struct irdma_cm_event *event) 4211 { 4212 atomic_inc(&event->cm_node->refcnt); 4213 INIT_WORK(&event->event_work, irdma_cm_event_handler); 4214 queue_work(event->cm_node->cm_core->event_wq, &event->event_work); 4215 } 4216 4217 /** 4218 * irdma_cm_teardown_connections - teardown QPs 4219 * @iwdev: device pointer 4220 * @ipaddr: Pointer to IPv4 or IPv6 address 4221 * @nfo: Connection info 4222 * @disconnect_all: flag indicating disconnect all QPs 4223 * 4224 * teardown QPs where source or destination addr matches ip addr 4225 */ 4226 static void __unused 4227 irdma_cm_teardown_connections(struct irdma_device *iwdev, 4228 u32 *ipaddr, 4229 struct irdma_cm_info *nfo, 4230 bool disconnect_all) 4231 { 4232 struct irdma_cm_core *cm_core = &iwdev->cm_core; 4233 struct list_head *list_core_temp; 4234 struct list_head *list_node; 4235 struct irdma_cm_node *cm_node; 4236 struct list_head teardown_list; 4237 struct ib_qp_attr attr; 4238 struct irdma_qp *qp; 4239 4240 INIT_LIST_HEAD(&teardown_list); 4241 4242 rcu_read_lock(); 4243 irdma_iw_teardown_list_prep(cm_core, &teardown_list, ipaddr, nfo, disconnect_all); 4244 rcu_read_unlock(); 4245 4246 attr.qp_state = IB_QPS_ERR; 4247 list_for_each_safe(list_node, list_core_temp, &teardown_list) { 4248 cm_node = container_of(list_node, struct irdma_cm_node, 4249 teardown_entry); 4250 irdma_modify_qp(&cm_node->iwqp->ibqp, &attr, IB_QP_STATE, NULL); 4251 if (iwdev->rf->reset) 4252 irdma_cm_disconn(cm_node->iwqp); 4253 irdma_rem_ref_cm_node(cm_node); 4254 } 4255 4256 if (!rdma_protocol_roce(&iwdev->ibdev, 1)) 4257 return; 4258 4259 INIT_LIST_HEAD(&teardown_list); 4260 irdma_roce_teardown_list_prep(iwdev, &teardown_list, ipaddr, nfo, disconnect_all); 4261 4262 list_for_each_safe(list_node, list_core_temp, &teardown_list) { 4263 qp = container_of(list_node, struct irdma_qp, teardown_entry); 4264 irdma_modify_qp_roce(&qp->ibqp, &attr, IB_QP_STATE, NULL); 4265 irdma_ib_qp_event(qp, IRDMA_QP_EVENT_CATASTROPHIC); 4266 irdma_qp_rem_ref(&qp->ibqp); 4267 } 4268 } 4269