1 /*- 2 * SPDX-License-Identifier: GPL-2.0 or Linux-OpenIB 3 * 4 * Copyright (c) 2015 - 2025 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 tcp_set_flags(tcph, tcp_get_flags(tcph) | 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 tcp_set_flags(tcph, tcp_get_flags(tcph) | 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 tcp_set_flags(tcph, tcp_get_flags(tcph) | TH_FIN); 413 } 414 415 if (flags & SET_RST) 416 tcp_set_flags(tcph, tcp_get_flags(tcph) | 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 tcp_set_flags(tcph, tcp_get_flags(tcph) | 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 tcp_set_flags(tcph, tcp_get_flags(tcph) | 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 tcp_set_flags(tcph, tcp_get_flags(tcph) | TH_FIN); 600 } 601 602 if (flags & SET_RST) 603 tcp_set_flags(tcph, tcp_get_flags(tcph) | 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)tcp_get_flags(tcph) & 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 = timer_container_of(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 u16 vlan_id = 0xFFFF; 1668 1669 #ifdef INET 1670 if_t netdev; 1671 struct vnet *vnet = &init_net; 1672 1673 #ifdef VIMAGE 1674 vnet = irdma_cmid_to_vnet(cm_id); 1675 #endif 1676 netdev = ip_ifp_find(vnet, htonl(addr[0])); 1677 if (netdev) { 1678 vlan_id = rdma_vlan_dev_vlan_id(netdev); 1679 dev_put(netdev); 1680 } 1681 #endif 1682 1683 return vlan_id; 1684 } 1685 1686 /** 1687 * irdma_add_mqh_ifa_cb - Adds multiple qhashes for IPv4/IPv6 1688 * @arg: Calback argument structure from irdma_add_mqh 1689 * @ifa: Current address to compute against 1690 * @count: Current cumulative output of all callbacks in this iteration 1691 * 1692 * Adds a qhash and a child listen node for a single IPv4/IPv6 address 1693 * on the adapter and adds the associated qhash filter 1694 */ 1695 static u_int 1696 irdma_add_mqh_ifa_cb(void *arg, struct ifaddr *ifa, u_int count) 1697 { 1698 struct irdma_add_mqh_cbs *cbs = arg; 1699 struct irdma_cm_listener *child_listen_node; 1700 struct irdma_cm_info *cm_info = cbs->cm_info; 1701 struct irdma_device *iwdev = cbs->iwdev; 1702 struct irdma_cm_listener *cm_parent_listen_node = cbs->cm_listen_node; 1703 if_t ip_dev = ifa->ifa_ifp; 1704 unsigned long flags; 1705 int ret; 1706 1707 if (count) 1708 return 0; 1709 1710 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_ATOMIC); 1711 if (!child_listen_node) { 1712 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 1713 "listener memory allocation\n"); 1714 return -ENOMEM; 1715 } 1716 1717 memcpy(child_listen_node, cm_parent_listen_node, 1718 sizeof(*child_listen_node)); 1719 cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev); 1720 child_listen_node->vlan_id = cm_info->vlan_id; 1721 if (cm_info->ipv4) { 1722 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 1723 "Allocating child CM Listener forIP=%x, vlan_id=%d, MAC=%x:%x:%x:%x:%x:%x\n", 1724 ((struct sockaddr_in *)&ifa->ifa_addr)->sin_addr.s_addr, 1725 rdma_vlan_dev_vlan_id(ip_dev), 1726 if_getlladdr(ip_dev)[0], if_getlladdr(ip_dev)[1], 1727 if_getlladdr(ip_dev)[2], if_getlladdr(ip_dev)[3], 1728 if_getlladdr(ip_dev)[4], if_getlladdr(ip_dev)[5]); 1729 child_listen_node->loc_addr[0] = 1730 ntohl(((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr); 1731 } else { 1732 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 1733 "IP=%x:%x:%x:%x, vlan_id=%d, MAC=%x:%x:%x:%x:%x:%x\n", 1734 IRDMA_PRINT_IP6(&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr), 1735 rdma_vlan_dev_vlan_id(ip_dev), 1736 if_getlladdr(ip_dev)[0], if_getlladdr(ip_dev)[1], 1737 if_getlladdr(ip_dev)[2], if_getlladdr(ip_dev)[3], 1738 if_getlladdr(ip_dev)[4], if_getlladdr(ip_dev)[5]); 1739 irdma_copy_ip_ntohl(child_listen_node->loc_addr, 1740 ((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr.__u6_addr.__u6_addr32); 1741 } 1742 memcpy(cm_info->loc_addr, child_listen_node->loc_addr, 1743 sizeof(cm_info->loc_addr)); 1744 if (!iwdev->vsi.dscp_mode) 1745 cm_info->user_pri = 1746 irdma_iw_get_vlan_prio(child_listen_node->loc_addr, 1747 cm_info->user_pri, 1748 cm_info->ipv4); 1749 ret = irdma_add_qhash_wait_no_lock(iwdev, cm_info); 1750 if (ret) { 1751 kfree(child_listen_node); 1752 return ret; 1753 } 1754 1755 child_listen_node->qhash_set = true; 1756 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags); 1757 list_add(&child_listen_node->child_listen_list, 1758 &cm_parent_listen_node->child_listen_list); 1759 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); 1760 cm_parent_listen_node->cm_core->stats_listen_nodes_created++; 1761 1762 return 0; 1763 } 1764 1765 /** 1766 * irdma_add_mqh - Adds multiple qhashes 1767 * @iwdev: iWarp device 1768 * @cm_info: CM info for parent listen node 1769 * @cm_listen_node: The parent listen node 1770 */ 1771 static int 1772 irdma_add_mqh(struct irdma_device *iwdev, 1773 struct irdma_cm_info *cm_info, 1774 struct irdma_cm_listener *cm_listen_node) 1775 { 1776 struct epoch_tracker et; 1777 struct irdma_add_mqh_cbs cbs; 1778 struct if_iter iter; 1779 if_t ifp; 1780 int err = -ENOENT; 1781 1782 cbs.iwdev = iwdev; 1783 cbs.cm_info = cm_info; 1784 cbs.cm_listen_node = cm_listen_node; 1785 1786 VNET_ITERATOR_DECL(vnet_iter); 1787 1788 VNET_LIST_RLOCK(); 1789 NET_EPOCH_ENTER(et); 1790 VNET_FOREACH(vnet_iter) { 1791 CURVNET_SET_QUIET(vnet_iter); 1792 for (ifp = if_iter_start(&iter); ifp != NULL; ifp = if_iter_next(&iter)) { 1793 if (!(if_getflags(ifp) & IFF_UP)) 1794 continue; 1795 1796 if (((rdma_vlan_dev_vlan_id(ifp) >= VLAN_N_VID) || 1797 (rdma_vlan_dev_real_dev(ifp) != iwdev->netdev)) && 1798 ifp != iwdev->netdev) 1799 continue; 1800 1801 if_addr_rlock(ifp); 1802 if (cm_info->ipv4) 1803 err = if_foreach_addr_type(ifp, AF_INET, irdma_add_mqh_ifa_cb, &cbs); 1804 else 1805 err = if_foreach_addr_type(ifp, AF_INET6, irdma_add_mqh_ifa_cb, &cbs); 1806 if_addr_runlock(ifp); 1807 } 1808 if_iter_finish(&iter); 1809 CURVNET_RESTORE(); 1810 } 1811 NET_EPOCH_EXIT(et); 1812 VNET_LIST_RUNLOCK(); 1813 1814 return err; 1815 } 1816 1817 /** 1818 * irdma_reset_list_prep - add connection nodes slated for reset to list 1819 * @cm_core: cm's core 1820 * @listener: pointer to listener node 1821 * @reset_list: a list to which cm_node will be selected 1822 */ 1823 static void 1824 irdma_reset_list_prep(struct irdma_cm_core *cm_core, 1825 struct irdma_cm_listener *listener, 1826 struct list_head *reset_list) 1827 { 1828 struct irdma_cm_node *cm_node; 1829 int bkt; 1830 1831 HASH_FOR_EACH_RCU(cm_core->cm_hash_tbl, bkt, cm_node, list) { 1832 if (cm_node->listener == listener && 1833 !cm_node->accelerated && 1834 atomic_inc_not_zero(&cm_node->refcnt)) 1835 list_add(&cm_node->reset_entry, reset_list); 1836 } 1837 } 1838 1839 /** 1840 * irdma_dec_refcnt_listen - delete listener and associated cm nodes 1841 * @cm_core: cm's core 1842 * @listener: pointer to listener node 1843 * @free_hanging_nodes: to free associated cm_nodes 1844 * @apbvt_del: flag to delete the apbvt 1845 */ 1846 static int 1847 irdma_dec_refcnt_listen(struct irdma_cm_core *cm_core, 1848 struct irdma_cm_listener *listener, 1849 int free_hanging_nodes, bool apbvt_del) 1850 { 1851 struct list_head *list_pos; 1852 struct list_head *list_temp; 1853 struct irdma_cm_node *cm_node; 1854 struct list_head reset_list; 1855 struct irdma_cm_info nfo; 1856 enum irdma_cm_node_state old_state; 1857 unsigned long flags; 1858 int err; 1859 1860 /* free non-accelerated child nodes for this listener */ 1861 INIT_LIST_HEAD(&reset_list); 1862 if (free_hanging_nodes) { 1863 rcu_read_lock(); 1864 irdma_reset_list_prep(cm_core, listener, &reset_list); 1865 rcu_read_unlock(); 1866 } 1867 1868 list_for_each_safe(list_pos, list_temp, &reset_list) { 1869 cm_node = container_of(list_pos, struct irdma_cm_node, 1870 reset_entry); 1871 if (cm_node->state >= IRDMA_CM_STATE_FIN_WAIT1) { 1872 irdma_rem_ref_cm_node(cm_node); 1873 continue; 1874 } 1875 1876 irdma_cleanup_retrans_entry(cm_node); 1877 err = irdma_send_reset(cm_node); 1878 if (err) { 1879 cm_node->state = IRDMA_CM_STATE_CLOSED; 1880 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 1881 "send reset failed\n"); 1882 } else { 1883 old_state = cm_node->state; 1884 cm_node->state = IRDMA_CM_STATE_LISTENER_DESTROYED; 1885 if (old_state != IRDMA_CM_STATE_MPAREQ_RCVD) 1886 irdma_rem_ref_cm_node(cm_node); 1887 } 1888 } 1889 1890 if (atomic_dec_and_test(&listener->refcnt)) { 1891 spin_lock_irqsave(&cm_core->listen_list_lock, flags); 1892 list_del(&listener->list); 1893 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); 1894 1895 if (apbvt_del) 1896 irdma_del_apbvt(listener->iwdev, 1897 listener->apbvt_entry); 1898 memcpy(nfo.loc_addr, listener->loc_addr, sizeof(nfo.loc_addr)); 1899 nfo.loc_port = listener->loc_port; 1900 nfo.ipv4 = listener->ipv4; 1901 nfo.vlan_id = listener->vlan_id; 1902 nfo.user_pri = listener->user_pri; 1903 nfo.qh_qpid = listener->iwdev->vsi.ilq->qp_id; 1904 1905 if (!list_empty(&listener->child_listen_list)) { 1906 irdma_del_multiple_qhash(listener->iwdev, &nfo, 1907 listener); 1908 } else { 1909 if (listener->qhash_set) 1910 irdma_manage_qhash(listener->iwdev, 1911 &nfo, 1912 IRDMA_QHASH_TYPE_TCP_SYN, 1913 IRDMA_QHASH_MANAGE_TYPE_DELETE, 1914 NULL, false); 1915 } 1916 1917 cm_core->stats_listen_destroyed++; 1918 cm_core->stats_listen_nodes_destroyed++; 1919 irdma_debug(&listener->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 1920 "loc_port=0x%04x loc_addr=%x cm_listen_node=%p cm_id=%p qhash_set=%d vlan_id=%d apbvt_del=%d\n", 1921 listener->loc_port, listener->loc_addr[0], listener, 1922 listener->cm_id, listener->qhash_set, 1923 listener->vlan_id, apbvt_del); 1924 kfree(listener); 1925 listener = NULL; 1926 return 0; 1927 } 1928 1929 return -EINVAL; 1930 } 1931 1932 /** 1933 * irdma_cm_del_listen - delete a listener 1934 * @cm_core: cm's core 1935 * @listener: passive connection's listener 1936 * @apbvt_del: flag to delete apbvt 1937 */ 1938 static int 1939 irdma_cm_del_listen(struct irdma_cm_core *cm_core, 1940 struct irdma_cm_listener *listener, 1941 bool apbvt_del) 1942 { 1943 listener->listener_state = IRDMA_CM_LISTENER_PASSIVE_STATE; 1944 listener->cm_id = NULL; 1945 1946 return irdma_dec_refcnt_listen(cm_core, listener, 1, apbvt_del); 1947 } 1948 1949 /** 1950 * irdma_find_node - find a cm node that matches the reference cm node 1951 * @cm_core: cm's core 1952 * @rem_port: remote tcp port num 1953 * @rem_addr: remote ip addr 1954 * @loc_port: local tcp port num 1955 * @loc_addr: local ip addr 1956 * @vlan_id: local VLAN ID 1957 */ 1958 struct irdma_cm_node * 1959 irdma_find_node(struct irdma_cm_core *cm_core, 1960 u16 rem_port, u32 *rem_addr, u16 loc_port, 1961 u32 *loc_addr, u16 vlan_id) 1962 { 1963 struct irdma_cm_node *cm_node; 1964 u32 key = (rem_port << 16) | loc_port; 1965 1966 rcu_read_lock(); 1967 HASH_FOR_EACH_POSSIBLE_RCU(cm_core->cm_hash_tbl, cm_node, list, key) { 1968 if (cm_node->vlan_id == vlan_id && 1969 cm_node->loc_port == loc_port && cm_node->rem_port == rem_port && 1970 !memcmp(cm_node->loc_addr, loc_addr, sizeof(cm_node->loc_addr)) && 1971 !memcmp(cm_node->rem_addr, rem_addr, sizeof(cm_node->rem_addr))) { 1972 if (!atomic_inc_not_zero(&cm_node->refcnt)) 1973 goto exit; 1974 rcu_read_unlock(); 1975 return cm_node; 1976 } 1977 } 1978 1979 exit: 1980 rcu_read_unlock(); 1981 1982 /* no owner node */ 1983 return NULL; 1984 } 1985 1986 /** 1987 * irdma_add_hte_node - add a cm node to the hash table 1988 * @cm_core: cm's core 1989 * @cm_node: connection's node 1990 */ 1991 static void 1992 irdma_add_hte_node(struct irdma_cm_core *cm_core, 1993 struct irdma_cm_node *cm_node) 1994 { 1995 unsigned long flags; 1996 u32 key = (cm_node->rem_port << 16) | cm_node->loc_port; 1997 1998 spin_lock_irqsave(&cm_core->ht_lock, flags); 1999 HASH_ADD_RCU(cm_core->cm_hash_tbl, &cm_node->list, key); 2000 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 2001 } 2002 2003 /** 2004 * irdma_ipv4_is_lpb - check if loopback 2005 * @loc_addr: local addr to compare 2006 * @rem_addr: remote address 2007 */ 2008 bool 2009 irdma_ipv4_is_lpb(u32 loc_addr, u32 rem_addr) 2010 { 2011 return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr); 2012 } 2013 2014 /** 2015 * irdma_ipv6_is_lpb - check if loopback 2016 * @loc_addr: local addr to compare 2017 * @rem_addr: remote address 2018 */ 2019 bool 2020 irdma_ipv6_is_lpb(u32 *loc_addr, u32 *rem_addr) 2021 { 2022 struct in6_addr raddr6; 2023 2024 irdma_copy_ip_htonl(raddr6.__u6_addr.__u6_addr32, rem_addr); 2025 2026 return !memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6); 2027 } 2028 2029 /** 2030 * irdma_cm_create_ah - create a cm address handle 2031 * @cm_node: The connection manager node to create AH for 2032 * @wait: Provides option to wait for ah creation or not 2033 */ 2034 static int 2035 irdma_cm_create_ah(struct irdma_cm_node *cm_node, bool wait) 2036 { 2037 struct irdma_ah_info ah_info = {0}; 2038 struct irdma_device *iwdev = cm_node->iwdev; 2039 #ifdef VIMAGE 2040 struct vnet *vnet = irdma_cmid_to_vnet(cm_node->cm_id); 2041 #endif 2042 2043 ether_addr_copy(ah_info.mac_addr, if_getlladdr(iwdev->netdev)); 2044 2045 ah_info.hop_ttl = 0x40; 2046 ah_info.tc_tos = cm_node->tos; 2047 ah_info.vsi = &iwdev->vsi; 2048 2049 if (cm_node->ipv4) { 2050 ah_info.ipv4_valid = true; 2051 ah_info.dest_ip_addr[0] = cm_node->rem_addr[0]; 2052 ah_info.src_ip_addr[0] = cm_node->loc_addr[0]; 2053 CURVNET_SET_QUIET(vnet); 2054 ah_info.do_lpbk = irdma_ipv4_is_lpb(ah_info.src_ip_addr[0], 2055 ah_info.dest_ip_addr[0]); 2056 CURVNET_RESTORE(); 2057 } else { 2058 memcpy(ah_info.dest_ip_addr, cm_node->rem_addr, 2059 sizeof(ah_info.dest_ip_addr)); 2060 memcpy(ah_info.src_ip_addr, cm_node->loc_addr, 2061 sizeof(ah_info.src_ip_addr)); 2062 ah_info.do_lpbk = irdma_ipv6_is_lpb(ah_info.src_ip_addr, 2063 ah_info.dest_ip_addr); 2064 } 2065 2066 ah_info.vlan_tag = cm_node->vlan_id; 2067 if (cm_node->vlan_id < VLAN_N_VID) { 2068 ah_info.insert_vlan_tag = 1; 2069 ah_info.vlan_tag |= cm_node->user_pri << VLAN_PRIO_SHIFT; 2070 } 2071 2072 ah_info.dst_arpindex = 2073 irdma_arp_table(iwdev->rf, ah_info.dest_ip_addr, 2074 NULL, IRDMA_ARP_RESOLVE); 2075 2076 if (irdma_puda_create_ah(&iwdev->rf->sc_dev, &ah_info, wait, 2077 IRDMA_PUDA_RSRC_TYPE_ILQ, cm_node, 2078 &cm_node->ah)) 2079 return -ENOMEM; 2080 2081 return 0; 2082 } 2083 2084 /** 2085 * irdma_cm_free_ah - free a cm address handle 2086 * @cm_node: The connection manager node to create AH for 2087 */ 2088 static void 2089 irdma_cm_free_ah(struct irdma_cm_node *cm_node) 2090 { 2091 struct irdma_device *iwdev = cm_node->iwdev; 2092 2093 irdma_puda_free_ah(&iwdev->rf->sc_dev, cm_node->ah); 2094 cm_node->ah = NULL; 2095 } 2096 2097 /** 2098 * irdma_make_cm_node - create a new instance of a cm node 2099 * @cm_core: cm's core 2100 * @iwdev: iwarp device structure 2101 * @cm_info: quad info for connection 2102 * @listener: passive connection's listener 2103 */ 2104 static struct irdma_cm_node * 2105 irdma_make_cm_node(struct irdma_cm_core *cm_core, struct irdma_device *iwdev, 2106 struct irdma_cm_info *cm_info, 2107 struct irdma_cm_listener *listener) 2108 { 2109 struct irdma_cm_node *cm_node; 2110 int arpindex; 2111 if_t netdev = iwdev->netdev; 2112 2113 /* create an hte and cm_node for this instance */ 2114 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC); 2115 if (!cm_node) 2116 return NULL; 2117 2118 /* set our node specific transport info */ 2119 cm_node->ipv4 = cm_info->ipv4; 2120 cm_node->vlan_id = cm_info->vlan_id; 2121 if (cm_node->vlan_id >= VLAN_N_VID && iwdev->dcb_vlan_mode) 2122 cm_node->vlan_id = 0; 2123 cm_node->tos = cm_info->tos; 2124 cm_node->user_pri = cm_info->user_pri; 2125 if (listener) { 2126 if (listener->tos != cm_info->tos) 2127 irdma_dev_warn(&iwdev->ibdev, 2128 "application TOS[%d] and remote client TOS[%d] mismatch\n", 2129 listener->tos, cm_info->tos); 2130 if (iwdev->vsi.dscp_mode) { 2131 cm_node->user_pri = listener->user_pri; 2132 } else { 2133 cm_node->tos = max(listener->tos, cm_info->tos); 2134 cm_node->user_pri = rt_tos2priority(cm_node->tos); 2135 cm_node->user_pri = 2136 irdma_iw_get_vlan_prio(cm_info->loc_addr, 2137 cm_node->user_pri, 2138 cm_info->ipv4); 2139 } 2140 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_DCB, 2141 "listener: TOS:[%d] UP:[%d]\n", cm_node->tos, 2142 cm_node->user_pri); 2143 } 2144 memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr)); 2145 memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr)); 2146 cm_node->loc_port = cm_info->loc_port; 2147 cm_node->rem_port = cm_info->rem_port; 2148 2149 cm_node->mpa_frame_rev = IRDMA_CM_DEFAULT_MPA_VER; 2150 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO; 2151 cm_node->iwdev = iwdev; 2152 cm_node->dev = &iwdev->rf->sc_dev; 2153 2154 cm_node->ird_size = cm_node->dev->hw_attrs.max_hw_ird; 2155 cm_node->ord_size = cm_node->dev->hw_attrs.max_hw_ord; 2156 2157 cm_node->listener = listener; 2158 cm_node->cm_id = cm_info->cm_id; 2159 ether_addr_copy(cm_node->loc_mac, if_getlladdr(netdev)); 2160 spin_lock_init(&cm_node->retrans_list_lock); 2161 cm_node->ack_rcvd = false; 2162 2163 init_completion(&cm_node->establish_comp); 2164 atomic_set(&cm_node->refcnt, 1); 2165 /* associate our parent CM core */ 2166 cm_node->cm_core = cm_core; 2167 cm_node->tcp_cntxt.loc_id = IRDMA_CM_DEFAULT_LOCAL_ID; 2168 cm_node->tcp_cntxt.rcv_wscale = iwdev->rcv_wscale; 2169 cm_node->tcp_cntxt.rcv_wnd = iwdev->rcv_wnd >> cm_node->tcp_cntxt.rcv_wscale; 2170 kc_set_loc_seq_num_mss(cm_node); 2171 2172 arpindex = irdma_resolve_neigh_lpb_chk(iwdev, cm_node, cm_info); 2173 if (arpindex < 0) 2174 goto err; 2175 2176 ether_addr_copy(cm_node->rem_mac, iwdev->rf->arp_table[arpindex].mac_addr); 2177 irdma_add_hte_node(cm_core, cm_node); 2178 cm_core->stats_nodes_created++; 2179 return cm_node; 2180 2181 err: 2182 kfree(cm_node); 2183 2184 return NULL; 2185 } 2186 2187 static void 2188 irdma_destroy_connection(struct irdma_cm_node *cm_node) 2189 { 2190 struct irdma_cm_core *cm_core = cm_node->cm_core; 2191 struct irdma_qp *iwqp; 2192 struct irdma_cm_info nfo; 2193 2194 /* if the node is destroyed before connection was accelerated */ 2195 if (!cm_node->accelerated && cm_node->accept_pend) { 2196 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2197 "node destroyed before established\n"); 2198 atomic_dec(&cm_node->listener->pend_accepts_cnt); 2199 } 2200 if (cm_node->close_entry) 2201 irdma_handle_close_entry(cm_node, 0); 2202 if (cm_node->listener) { 2203 irdma_dec_refcnt_listen(cm_core, cm_node->listener, 0, true); 2204 } else { 2205 if (cm_node->apbvt_set) { 2206 irdma_del_apbvt(cm_node->iwdev, cm_node->apbvt_entry); 2207 cm_node->apbvt_set = 0; 2208 } 2209 irdma_get_addr_info(cm_node, &nfo); 2210 if (cm_node->qhash_set) { 2211 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id; 2212 irdma_manage_qhash(cm_node->iwdev, &nfo, 2213 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 2214 IRDMA_QHASH_MANAGE_TYPE_DELETE, NULL, 2215 false); 2216 cm_node->qhash_set = 0; 2217 } 2218 } 2219 2220 iwqp = cm_node->iwqp; 2221 if (iwqp) { 2222 cm_node->cm_id->rem_ref(cm_node->cm_id); 2223 cm_node->cm_id = NULL; 2224 iwqp->cm_id = NULL; 2225 irdma_qp_rem_ref(&iwqp->ibqp); 2226 cm_node->iwqp = NULL; 2227 } else if (cm_node->qhash_set) { 2228 irdma_get_addr_info(cm_node, &nfo); 2229 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id; 2230 irdma_manage_qhash(cm_node->iwdev, &nfo, 2231 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 2232 IRDMA_QHASH_MANAGE_TYPE_DELETE, NULL, false); 2233 cm_node->qhash_set = 0; 2234 } 2235 2236 cm_core->cm_free_ah(cm_node); 2237 } 2238 2239 /** 2240 * irdma_rem_ref_cm_node - destroy an instance of a cm node 2241 * @cm_node: connection's node 2242 */ 2243 void 2244 irdma_rem_ref_cm_node(struct irdma_cm_node *cm_node) 2245 { 2246 struct irdma_cm_core *cm_core = cm_node->cm_core; 2247 unsigned long flags; 2248 2249 spin_lock_irqsave(&cm_core->ht_lock, flags); 2250 2251 if (!atomic_dec_and_test(&cm_node->refcnt)) { 2252 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 2253 return; 2254 } 2255 if (cm_node->iwqp) { 2256 cm_node->iwqp->cm_node = NULL; 2257 cm_node->iwqp->cm_id = NULL; 2258 } 2259 HASH_DEL_RCU(cm_core->cm_hash_tbl, &cm_node->list); 2260 cm_node->cm_core->stats_nodes_destroyed++; 2261 2262 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 2263 2264 irdma_destroy_connection(cm_node); 2265 2266 kfree_rcu(cm_node, rcu_head); 2267 } 2268 2269 /** 2270 * irdma_handle_fin_pkt - FIN packet received 2271 * @cm_node: connection's node 2272 */ 2273 static void 2274 irdma_handle_fin_pkt(struct irdma_cm_node *cm_node) 2275 { 2276 switch (cm_node->state) { 2277 case IRDMA_CM_STATE_SYN_RCVD: 2278 case IRDMA_CM_STATE_SYN_SENT: 2279 case IRDMA_CM_STATE_ESTABLISHED: 2280 case IRDMA_CM_STATE_MPAREJ_RCVD: 2281 cm_node->tcp_cntxt.rcv_nxt++; 2282 irdma_cleanup_retrans_entry(cm_node); 2283 cm_node->state = IRDMA_CM_STATE_LAST_ACK; 2284 irdma_send_fin(cm_node); 2285 break; 2286 case IRDMA_CM_STATE_MPAREQ_SENT: 2287 irdma_create_event(cm_node, IRDMA_CM_EVENT_ABORTED); 2288 cm_node->tcp_cntxt.rcv_nxt++; 2289 irdma_cleanup_retrans_entry(cm_node); 2290 cm_node->state = IRDMA_CM_STATE_CLOSED; 2291 atomic_inc(&cm_node->refcnt); 2292 irdma_send_reset(cm_node); 2293 break; 2294 case IRDMA_CM_STATE_FIN_WAIT1: 2295 cm_node->tcp_cntxt.rcv_nxt++; 2296 irdma_cleanup_retrans_entry(cm_node); 2297 cm_node->state = IRDMA_CM_STATE_CLOSING; 2298 irdma_send_ack(cm_node); 2299 /* 2300 * Wait for ACK as this is simultaneous close. After we receive ACK, do not send anything. Just rm the 2301 * node. 2302 */ 2303 break; 2304 case IRDMA_CM_STATE_FIN_WAIT2: 2305 cm_node->tcp_cntxt.rcv_nxt++; 2306 irdma_cleanup_retrans_entry(cm_node); 2307 cm_node->state = IRDMA_CM_STATE_TIME_WAIT; 2308 irdma_send_ack(cm_node); 2309 irdma_schedule_cm_timer(cm_node, NULL, IRDMA_TIMER_TYPE_CLOSE, 2310 1, 0); 2311 break; 2312 case IRDMA_CM_STATE_TIME_WAIT: 2313 cm_node->tcp_cntxt.rcv_nxt++; 2314 irdma_cleanup_retrans_entry(cm_node); 2315 cm_node->state = IRDMA_CM_STATE_CLOSED; 2316 irdma_rem_ref_cm_node(cm_node); 2317 break; 2318 case IRDMA_CM_STATE_OFFLOADED: 2319 default: 2320 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2321 "bad state node state = %d\n", cm_node->state); 2322 break; 2323 } 2324 } 2325 2326 /** 2327 * irdma_handle_rst_pkt - process received RST packet 2328 * @cm_node: connection's node 2329 * @rbuf: receive buffer 2330 */ 2331 static void 2332 irdma_handle_rst_pkt(struct irdma_cm_node *cm_node, 2333 struct irdma_puda_buf *rbuf) 2334 { 2335 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2336 "caller: %pS cm_node=%p state=%d rem_port=0x%04x loc_port=0x%04x rem_addr=%x loc_addr=%x\n", 2337 __builtin_return_address(0), cm_node, cm_node->state, 2338 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr[0], 2339 cm_node->loc_addr[0]); 2340 2341 irdma_cleanup_retrans_entry(cm_node); 2342 switch (cm_node->state) { 2343 case IRDMA_CM_STATE_SYN_SENT: 2344 case IRDMA_CM_STATE_MPAREQ_SENT: 2345 switch (cm_node->mpa_frame_rev) { 2346 case IETF_MPA_V2: 2347 /* Drop down to MPA_V1 */ 2348 cm_node->mpa_frame_rev = IETF_MPA_V1; 2349 /* send a syn and goto syn sent state */ 2350 cm_node->state = IRDMA_CM_STATE_SYN_SENT; 2351 if (irdma_send_syn(cm_node, 0)) 2352 irdma_active_open_err(cm_node, false); 2353 break; 2354 case IETF_MPA_V1: 2355 default: 2356 irdma_active_open_err(cm_node, false); 2357 break; 2358 } 2359 break; 2360 case IRDMA_CM_STATE_MPAREQ_RCVD: 2361 atomic_inc(&cm_node->passive_state); 2362 break; 2363 case IRDMA_CM_STATE_ESTABLISHED: 2364 case IRDMA_CM_STATE_SYN_RCVD: 2365 case IRDMA_CM_STATE_LISTENING: 2366 irdma_passive_open_err(cm_node, false); 2367 break; 2368 case IRDMA_CM_STATE_OFFLOADED: 2369 irdma_active_open_err(cm_node, false); 2370 break; 2371 case IRDMA_CM_STATE_CLOSED: 2372 break; 2373 case IRDMA_CM_STATE_FIN_WAIT2: 2374 case IRDMA_CM_STATE_FIN_WAIT1: 2375 case IRDMA_CM_STATE_LAST_ACK: 2376 case IRDMA_CM_STATE_TIME_WAIT: 2377 cm_node->state = IRDMA_CM_STATE_CLOSED; 2378 irdma_rem_ref_cm_node(cm_node); 2379 break; 2380 default: 2381 break; 2382 } 2383 } 2384 2385 /** 2386 * irdma_handle_rcv_mpa - Process a recv'd mpa buffer 2387 * @cm_node: connection's node 2388 * @rbuf: receive buffer 2389 */ 2390 static void 2391 irdma_handle_rcv_mpa(struct irdma_cm_node *cm_node, 2392 struct irdma_puda_buf *rbuf) 2393 { 2394 int err; 2395 int datasize = rbuf->datalen; 2396 u8 *dataloc = rbuf->data; 2397 2398 enum irdma_cm_event_type type = IRDMA_CM_EVENT_UNKNOWN; 2399 u32 res_type; 2400 2401 err = irdma_parse_mpa(cm_node, dataloc, &res_type, datasize); 2402 if (err) { 2403 if (cm_node->state == IRDMA_CM_STATE_MPAREQ_SENT) 2404 irdma_active_open_err(cm_node, true); 2405 else 2406 irdma_passive_open_err(cm_node, true); 2407 return; 2408 } 2409 2410 switch (cm_node->state) { 2411 case IRDMA_CM_STATE_ESTABLISHED: 2412 if (res_type == IRDMA_MPA_REQUEST_REJECT) 2413 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2414 "state for reject\n"); 2415 cm_node->state = IRDMA_CM_STATE_MPAREQ_RCVD; 2416 type = IRDMA_CM_EVENT_MPA_REQ; 2417 irdma_send_ack(cm_node); /* ACK received MPA request */ 2418 atomic_set(&cm_node->passive_state, 2419 IRDMA_PASSIVE_STATE_INDICATED); 2420 break; 2421 case IRDMA_CM_STATE_MPAREQ_SENT: 2422 irdma_cleanup_retrans_entry(cm_node); 2423 if (res_type == IRDMA_MPA_REQUEST_REJECT) { 2424 type = IRDMA_CM_EVENT_MPA_REJECT; 2425 cm_node->state = IRDMA_CM_STATE_MPAREJ_RCVD; 2426 } else { 2427 type = IRDMA_CM_EVENT_CONNECTED; 2428 cm_node->state = IRDMA_CM_STATE_OFFLOADED; 2429 } 2430 irdma_send_ack(cm_node); 2431 break; 2432 default: 2433 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2434 "wrong cm_node state=%d\n", cm_node->state); 2435 break; 2436 } 2437 irdma_create_event(cm_node, type); 2438 } 2439 2440 /** 2441 * irdma_check_syn - Check for error on received syn ack 2442 * @cm_node: connection's node 2443 * @tcph: pointer tcp header 2444 */ 2445 static int 2446 irdma_check_syn(struct irdma_cm_node *cm_node, struct tcphdr *tcph) 2447 { 2448 if (ntohl(tcph->th_ack) != cm_node->tcp_cntxt.loc_seq_num) { 2449 irdma_active_open_err(cm_node, true); 2450 return 1; 2451 } 2452 2453 return 0; 2454 } 2455 2456 /** 2457 * irdma_check_seq - check seq numbers if OK 2458 * @cm_node: connection's node 2459 * @tcph: pointer tcp header 2460 */ 2461 static int 2462 irdma_check_seq(struct irdma_cm_node *cm_node, struct tcphdr *tcph) 2463 { 2464 u32 seq; 2465 u32 ack_seq; 2466 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num; 2467 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt; 2468 u32 rcv_wnd; 2469 int err = 0; 2470 2471 seq = ntohl(tcph->th_seq); 2472 ack_seq = ntohl(tcph->th_ack); 2473 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd; 2474 if (ack_seq != loc_seq_num || 2475 !between(seq, rcv_nxt, (rcv_nxt + rcv_wnd))) 2476 err = -1; 2477 if (err) 2478 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2479 "seq number err\n"); 2480 2481 return err; 2482 } 2483 2484 void 2485 irdma_add_conn_est_qh(struct irdma_cm_node *cm_node) 2486 { 2487 struct irdma_cm_info nfo; 2488 2489 irdma_get_addr_info(cm_node, &nfo); 2490 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id; 2491 irdma_manage_qhash(cm_node->iwdev, &nfo, 2492 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 2493 IRDMA_QHASH_MANAGE_TYPE_ADD, 2494 cm_node, false); 2495 cm_node->qhash_set = true; 2496 } 2497 2498 /** 2499 * irdma_handle_syn_pkt - is for Passive node 2500 * @cm_node: connection's node 2501 * @rbuf: receive buffer 2502 */ 2503 static void 2504 irdma_handle_syn_pkt(struct irdma_cm_node *cm_node, 2505 struct irdma_puda_buf *rbuf) 2506 { 2507 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2508 int err; 2509 u32 inc_sequence; 2510 int optionsize; 2511 2512 optionsize = (tcph->th_off << 2) - sizeof(*tcph); 2513 inc_sequence = ntohl(tcph->th_seq); 2514 2515 switch (cm_node->state) { 2516 case IRDMA_CM_STATE_SYN_SENT: 2517 case IRDMA_CM_STATE_MPAREQ_SENT: 2518 /* Rcvd syn on active open connection */ 2519 irdma_active_open_err(cm_node, 1); 2520 break; 2521 case IRDMA_CM_STATE_LISTENING: 2522 /* Passive OPEN */ 2523 if (atomic_read(&cm_node->listener->pend_accepts_cnt) > 2524 cm_node->listener->backlog) { 2525 cm_node->cm_core->stats_backlog_drops++; 2526 irdma_passive_open_err(cm_node, false); 2527 break; 2528 } 2529 err = irdma_handle_tcp_options(cm_node, tcph, optionsize, 1); 2530 if (err) { 2531 irdma_passive_open_err(cm_node, false); 2532 /* drop pkt */ 2533 break; 2534 } 2535 err = cm_node->cm_core->cm_create_ah(cm_node, false); 2536 if (err) { 2537 irdma_passive_open_err(cm_node, false); 2538 /* drop pkt */ 2539 break; 2540 } 2541 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; 2542 cm_node->accept_pend = 1; 2543 atomic_inc(&cm_node->listener->pend_accepts_cnt); 2544 2545 cm_node->state = IRDMA_CM_STATE_SYN_RCVD; 2546 break; 2547 case IRDMA_CM_STATE_CLOSED: 2548 irdma_cleanup_retrans_entry(cm_node); 2549 atomic_inc(&cm_node->refcnt); 2550 irdma_send_reset(cm_node); 2551 break; 2552 case IRDMA_CM_STATE_OFFLOADED: 2553 case IRDMA_CM_STATE_ESTABLISHED: 2554 case IRDMA_CM_STATE_FIN_WAIT1: 2555 case IRDMA_CM_STATE_FIN_WAIT2: 2556 case IRDMA_CM_STATE_MPAREQ_RCVD: 2557 case IRDMA_CM_STATE_LAST_ACK: 2558 case IRDMA_CM_STATE_CLOSING: 2559 case IRDMA_CM_STATE_UNKNOWN: 2560 default: 2561 break; 2562 } 2563 } 2564 2565 /** 2566 * irdma_handle_synack_pkt - Process SYN+ACK packet (active side) 2567 * @cm_node: connection's node 2568 * @rbuf: receive buffer 2569 */ 2570 static void 2571 irdma_handle_synack_pkt(struct irdma_cm_node *cm_node, 2572 struct irdma_puda_buf *rbuf) 2573 { 2574 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2575 int err; 2576 u32 inc_sequence; 2577 int optionsize; 2578 2579 optionsize = (tcph->th_off << 2) - sizeof(*tcph); 2580 inc_sequence = ntohl(tcph->th_seq); 2581 switch (cm_node->state) { 2582 case IRDMA_CM_STATE_SYN_SENT: 2583 irdma_cleanup_retrans_entry(cm_node); 2584 /* active open */ 2585 if (irdma_check_syn(cm_node, tcph)) { 2586 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2587 "check syn fail\n"); 2588 return; 2589 } 2590 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->th_ack); 2591 /* setup options */ 2592 err = irdma_handle_tcp_options(cm_node, tcph, optionsize, 0); 2593 if (err) { 2594 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2595 "cm_node=%p tcp_options failed\n", cm_node); 2596 break; 2597 } 2598 irdma_cleanup_retrans_entry(cm_node); 2599 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; 2600 irdma_send_ack(cm_node); /* ACK for the syn_ack */ 2601 err = irdma_send_mpa_request(cm_node); 2602 if (err) { 2603 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2604 "cm_node=%p irdma_send_mpa_request failed\n", 2605 cm_node); 2606 break; 2607 } 2608 cm_node->state = IRDMA_CM_STATE_MPAREQ_SENT; 2609 break; 2610 case IRDMA_CM_STATE_MPAREQ_RCVD: 2611 irdma_passive_open_err(cm_node, true); 2612 break; 2613 case IRDMA_CM_STATE_LISTENING: 2614 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->th_ack); 2615 irdma_cleanup_retrans_entry(cm_node); 2616 cm_node->state = IRDMA_CM_STATE_CLOSED; 2617 irdma_send_reset(cm_node); 2618 break; 2619 case IRDMA_CM_STATE_CLOSED: 2620 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->th_ack); 2621 irdma_cleanup_retrans_entry(cm_node); 2622 atomic_inc(&cm_node->refcnt); 2623 irdma_send_reset(cm_node); 2624 break; 2625 case IRDMA_CM_STATE_ESTABLISHED: 2626 case IRDMA_CM_STATE_FIN_WAIT1: 2627 case IRDMA_CM_STATE_FIN_WAIT2: 2628 case IRDMA_CM_STATE_LAST_ACK: 2629 case IRDMA_CM_STATE_OFFLOADED: 2630 case IRDMA_CM_STATE_CLOSING: 2631 case IRDMA_CM_STATE_UNKNOWN: 2632 case IRDMA_CM_STATE_MPAREQ_SENT: 2633 default: 2634 break; 2635 } 2636 } 2637 2638 /** 2639 * irdma_handle_ack_pkt - process packet with ACK 2640 * @cm_node: connection's node 2641 * @rbuf: receive buffer 2642 */ 2643 static int 2644 irdma_handle_ack_pkt(struct irdma_cm_node *cm_node, 2645 struct irdma_puda_buf *rbuf) 2646 { 2647 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2648 u32 inc_sequence; 2649 int ret; 2650 int optionsize; 2651 u32 datasize = rbuf->datalen; 2652 2653 optionsize = (tcph->th_off << 2) - sizeof(*tcph); 2654 2655 if (irdma_check_seq(cm_node, tcph)) 2656 return -EINVAL; 2657 2658 inc_sequence = ntohl(tcph->th_seq); 2659 switch (cm_node->state) { 2660 case IRDMA_CM_STATE_SYN_RCVD: 2661 irdma_cleanup_retrans_entry(cm_node); 2662 ret = irdma_handle_tcp_options(cm_node, tcph, optionsize, 1); 2663 if (ret) 2664 return ret; 2665 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->th_ack); 2666 cm_node->state = IRDMA_CM_STATE_ESTABLISHED; 2667 if (datasize) { 2668 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; 2669 irdma_handle_rcv_mpa(cm_node, rbuf); 2670 } 2671 break; 2672 case IRDMA_CM_STATE_ESTABLISHED: 2673 irdma_cleanup_retrans_entry(cm_node); 2674 if (datasize) { 2675 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; 2676 irdma_handle_rcv_mpa(cm_node, rbuf); 2677 } 2678 break; 2679 case IRDMA_CM_STATE_MPAREQ_SENT: 2680 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->th_ack); 2681 if (datasize) { 2682 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; 2683 cm_node->ack_rcvd = false; 2684 irdma_handle_rcv_mpa(cm_node, rbuf); 2685 } else { 2686 cm_node->ack_rcvd = true; 2687 } 2688 break; 2689 case IRDMA_CM_STATE_LISTENING: 2690 irdma_cleanup_retrans_entry(cm_node); 2691 cm_node->state = IRDMA_CM_STATE_CLOSED; 2692 irdma_send_reset(cm_node); 2693 break; 2694 case IRDMA_CM_STATE_CLOSED: 2695 irdma_cleanup_retrans_entry(cm_node); 2696 atomic_inc(&cm_node->refcnt); 2697 irdma_send_reset(cm_node); 2698 break; 2699 case IRDMA_CM_STATE_LAST_ACK: 2700 case IRDMA_CM_STATE_CLOSING: 2701 irdma_cleanup_retrans_entry(cm_node); 2702 cm_node->state = IRDMA_CM_STATE_CLOSED; 2703 irdma_rem_ref_cm_node(cm_node); 2704 break; 2705 case IRDMA_CM_STATE_FIN_WAIT1: 2706 irdma_cleanup_retrans_entry(cm_node); 2707 cm_node->state = IRDMA_CM_STATE_FIN_WAIT2; 2708 break; 2709 case IRDMA_CM_STATE_SYN_SENT: 2710 case IRDMA_CM_STATE_FIN_WAIT2: 2711 case IRDMA_CM_STATE_OFFLOADED: 2712 case IRDMA_CM_STATE_MPAREQ_RCVD: 2713 case IRDMA_CM_STATE_UNKNOWN: 2714 default: 2715 irdma_cleanup_retrans_entry(cm_node); 2716 break; 2717 } 2718 2719 return 0; 2720 } 2721 2722 /** 2723 * irdma_process_pkt - process cm packet 2724 * @cm_node: connection's node 2725 * @rbuf: receive buffer 2726 */ 2727 static void 2728 irdma_process_pkt(struct irdma_cm_node *cm_node, 2729 struct irdma_puda_buf *rbuf) 2730 { 2731 enum irdma_tcpip_pkt_type pkt_type = IRDMA_PKT_TYPE_UNKNOWN; 2732 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2733 u32 fin_set = 0; 2734 int err; 2735 2736 if (tcp_get_flags(tcph) & TH_RST) { 2737 pkt_type = IRDMA_PKT_TYPE_RST; 2738 } else if (tcp_get_flags(tcph) & TH_SYN) { 2739 pkt_type = IRDMA_PKT_TYPE_SYN; 2740 if (tcp_get_flags(tcph) & TH_ACK) 2741 pkt_type = IRDMA_PKT_TYPE_SYNACK; 2742 } else if (tcp_get_flags(tcph) & TH_ACK) { 2743 pkt_type = IRDMA_PKT_TYPE_ACK; 2744 } 2745 if (tcp_get_flags(tcph) & TH_FIN) 2746 fin_set = 1; 2747 2748 switch (pkt_type) { 2749 case IRDMA_PKT_TYPE_SYN: 2750 irdma_handle_syn_pkt(cm_node, rbuf); 2751 break; 2752 case IRDMA_PKT_TYPE_SYNACK: 2753 irdma_handle_synack_pkt(cm_node, rbuf); 2754 break; 2755 case IRDMA_PKT_TYPE_ACK: 2756 err = irdma_handle_ack_pkt(cm_node, rbuf); 2757 if (fin_set && !err) 2758 irdma_handle_fin_pkt(cm_node); 2759 break; 2760 case IRDMA_PKT_TYPE_RST: 2761 irdma_handle_rst_pkt(cm_node, rbuf); 2762 break; 2763 default: 2764 if (fin_set && 2765 (!irdma_check_seq(cm_node, (struct tcphdr *)rbuf->tcph))) 2766 irdma_handle_fin_pkt(cm_node); 2767 break; 2768 } 2769 } 2770 2771 /** 2772 * irdma_make_listen_node - create a listen node with params 2773 * @cm_core: cm's core 2774 * @iwdev: iwarp device structure 2775 * @cm_info: quad info for connection 2776 */ 2777 static struct irdma_cm_listener * 2778 irdma_make_listen_node(struct irdma_cm_core *cm_core, 2779 struct irdma_device *iwdev, 2780 struct irdma_cm_info *cm_info) 2781 { 2782 struct irdma_cm_listener *listener; 2783 unsigned long flags; 2784 2785 /* cannot have multiple matching listeners */ 2786 listener = irdma_find_listener(cm_core, cm_info->loc_addr, cm_info->ipv4, 2787 cm_info->loc_port, cm_info->vlan_id, 2788 IRDMA_CM_LISTENER_EITHER_STATE); 2789 if (listener && 2790 listener->listener_state == IRDMA_CM_LISTENER_ACTIVE_STATE) { 2791 atomic_dec(&listener->refcnt); 2792 return NULL; 2793 } 2794 2795 if (!listener) { 2796 /* 2797 * create a CM listen node 1/2 node to compare incoming traffic to 2798 */ 2799 listener = kzalloc(sizeof(*listener), GFP_KERNEL); 2800 if (!listener) 2801 return NULL; 2802 cm_core->stats_listen_nodes_created++; 2803 memcpy(listener->loc_addr, cm_info->loc_addr, 2804 sizeof(listener->loc_addr)); 2805 listener->loc_port = cm_info->loc_port; 2806 2807 INIT_LIST_HEAD(&listener->child_listen_list); 2808 2809 atomic_set(&listener->refcnt, 1); 2810 } else { 2811 listener->reused_node = 1; 2812 } 2813 2814 listener->cm_id = cm_info->cm_id; 2815 listener->ipv4 = cm_info->ipv4; 2816 listener->vlan_id = cm_info->vlan_id; 2817 atomic_set(&listener->pend_accepts_cnt, 0); 2818 listener->cm_core = cm_core; 2819 listener->iwdev = iwdev; 2820 2821 listener->backlog = cm_info->backlog; 2822 listener->listener_state = IRDMA_CM_LISTENER_ACTIVE_STATE; 2823 2824 if (!listener->reused_node) { 2825 spin_lock_irqsave(&cm_core->listen_list_lock, flags); 2826 list_add(&listener->list, &cm_core->listen_list); 2827 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); 2828 } 2829 2830 return listener; 2831 } 2832 2833 /** 2834 * irdma_create_cm_node - make a connection node with params 2835 * @cm_core: cm's core 2836 * @iwdev: iwarp device structure 2837 * @conn_param: connection parameters 2838 * @cm_info: quad info for connection 2839 * @caller_cm_node: pointer to cm_node structure to return 2840 */ 2841 static int 2842 irdma_create_cm_node(struct irdma_cm_core *cm_core, 2843 struct irdma_device *iwdev, 2844 struct iw_cm_conn_param *conn_param, 2845 struct irdma_cm_info *cm_info, 2846 struct irdma_cm_node **caller_cm_node) 2847 { 2848 struct irdma_cm_node *cm_node; 2849 u16 private_data_len = conn_param->private_data_len; 2850 const void *private_data = conn_param->private_data; 2851 2852 /* create a CM connection node */ 2853 cm_node = irdma_make_cm_node(cm_core, iwdev, cm_info, NULL); 2854 if (!cm_node) 2855 return -ENOMEM; 2856 2857 /* set our node side to client (active) side */ 2858 cm_node->tcp_cntxt.client = 1; 2859 cm_node->tcp_cntxt.rcv_wscale = IRDMA_CM_DEFAULT_RCV_WND_SCALE; 2860 2861 irdma_record_ird_ord(cm_node, conn_param->ird, conn_param->ord); 2862 2863 cm_node->pdata.size = private_data_len; 2864 cm_node->pdata.addr = cm_node->pdata_buf; 2865 2866 memcpy(cm_node->pdata_buf, private_data, private_data_len); 2867 *caller_cm_node = cm_node; 2868 2869 return 0; 2870 } 2871 2872 /** 2873 * irdma_cm_reject - reject and teardown a connection 2874 * @cm_node: connection's node 2875 * @pdata: ptr to private data for reject 2876 * @plen: size of private data 2877 */ 2878 static int 2879 irdma_cm_reject(struct irdma_cm_node *cm_node, const void *pdata, 2880 u8 plen) 2881 { 2882 int ret; 2883 int passive_state; 2884 2885 if (cm_node->tcp_cntxt.client) 2886 return 0; 2887 2888 irdma_cleanup_retrans_entry(cm_node); 2889 2890 passive_state = atomic_add_return(1, &cm_node->passive_state); 2891 if (passive_state == IRDMA_SEND_RESET_EVENT) { 2892 cm_node->state = IRDMA_CM_STATE_CLOSED; 2893 irdma_rem_ref_cm_node(cm_node); 2894 return 0; 2895 } 2896 2897 if (cm_node->state == IRDMA_CM_STATE_LISTENER_DESTROYED) { 2898 irdma_rem_ref_cm_node(cm_node); 2899 return 0; 2900 } 2901 2902 ret = irdma_send_mpa_reject(cm_node, pdata, plen); 2903 if (!ret) 2904 return 0; 2905 2906 cm_node->state = IRDMA_CM_STATE_CLOSED; 2907 if (irdma_send_reset(cm_node)) 2908 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2909 "send reset failed\n"); 2910 2911 return ret; 2912 } 2913 2914 /** 2915 * irdma_cm_close - close of cm connection 2916 * @cm_node: connection's node 2917 */ 2918 static int 2919 irdma_cm_close(struct irdma_cm_node *cm_node) 2920 { 2921 switch (cm_node->state) { 2922 case IRDMA_CM_STATE_SYN_RCVD: 2923 case IRDMA_CM_STATE_SYN_SENT: 2924 case IRDMA_CM_STATE_ONE_SIDE_ESTABLISHED: 2925 case IRDMA_CM_STATE_ESTABLISHED: 2926 case IRDMA_CM_STATE_ACCEPTING: 2927 case IRDMA_CM_STATE_MPAREQ_SENT: 2928 case IRDMA_CM_STATE_MPAREQ_RCVD: 2929 irdma_cleanup_retrans_entry(cm_node); 2930 irdma_send_reset(cm_node); 2931 break; 2932 case IRDMA_CM_STATE_CLOSE_WAIT: 2933 cm_node->state = IRDMA_CM_STATE_LAST_ACK; 2934 irdma_send_fin(cm_node); 2935 break; 2936 case IRDMA_CM_STATE_FIN_WAIT1: 2937 case IRDMA_CM_STATE_FIN_WAIT2: 2938 case IRDMA_CM_STATE_LAST_ACK: 2939 case IRDMA_CM_STATE_TIME_WAIT: 2940 case IRDMA_CM_STATE_CLOSING: 2941 return -EINVAL; 2942 case IRDMA_CM_STATE_LISTENING: 2943 irdma_cleanup_retrans_entry(cm_node); 2944 irdma_send_reset(cm_node); 2945 break; 2946 case IRDMA_CM_STATE_MPAREJ_RCVD: 2947 case IRDMA_CM_STATE_UNKNOWN: 2948 case IRDMA_CM_STATE_INITED: 2949 case IRDMA_CM_STATE_CLOSED: 2950 case IRDMA_CM_STATE_LISTENER_DESTROYED: 2951 irdma_rem_ref_cm_node(cm_node); 2952 break; 2953 case IRDMA_CM_STATE_OFFLOADED: 2954 if (cm_node->send_entry) 2955 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2956 "CM send_entry in OFFLOADED state\n"); 2957 irdma_rem_ref_cm_node(cm_node); 2958 break; 2959 } 2960 2961 return 0; 2962 } 2963 2964 /** 2965 * irdma_receive_ilq - recv an ETHERNET packet, and process it 2966 * through CM 2967 * @vsi: VSI structure of dev 2968 * @rbuf: receive buffer 2969 */ 2970 void 2971 irdma_receive_ilq(struct irdma_sc_vsi *vsi, struct irdma_puda_buf *rbuf) 2972 { 2973 struct irdma_cm_node *cm_node; 2974 struct irdma_cm_listener *listener; 2975 struct ip *iph; 2976 struct ip6_hdr *ip6h; 2977 struct tcphdr *tcph; 2978 struct irdma_cm_info cm_info = {0}; 2979 struct irdma_device *iwdev = vsi->back_vsi; 2980 struct irdma_cm_core *cm_core = &iwdev->cm_core; 2981 struct ether_vlan_header *ethh; 2982 u16 vtag; 2983 2984 /* if vlan, then maclen = 18 else 14 */ 2985 iph = (struct ip *)rbuf->iph; 2986 irdma_debug_buf(vsi->dev, IRDMA_DEBUG_ILQ, "RECEIVE ILQ BUFFER", 2987 rbuf->mem.va, rbuf->totallen); 2988 if (iwdev->rf->sc_dev.hw_attrs.uk_attrs.hw_rev >= IRDMA_GEN_2) { 2989 if (rbuf->vlan_valid) { 2990 vtag = rbuf->vlan_id; 2991 cm_info.user_pri = (vtag & EVL_PRI_MASK) >> 2992 VLAN_PRIO_SHIFT; 2993 cm_info.vlan_id = vtag & EVL_VLID_MASK; 2994 } else { 2995 cm_info.vlan_id = 0xFFFF; 2996 } 2997 } else { 2998 ethh = rbuf->mem.va; 2999 3000 if (ethh->evl_proto == htons(ETH_P_8021Q)) { 3001 vtag = ntohs(ethh->evl_tag); 3002 cm_info.user_pri = (vtag & EVL_PRI_MASK) >> 3003 VLAN_PRIO_SHIFT; 3004 cm_info.vlan_id = vtag & EVL_VLID_MASK; 3005 irdma_debug(&cm_core->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3006 "vlan_id=%d\n", cm_info.vlan_id); 3007 } else { 3008 cm_info.vlan_id = 0xFFFF; 3009 } 3010 } 3011 tcph = (struct tcphdr *)rbuf->tcph; 3012 3013 if (rbuf->ipv4) { 3014 cm_info.loc_addr[0] = ntohl(iph->ip_dst.s_addr); 3015 cm_info.rem_addr[0] = ntohl(iph->ip_src.s_addr); 3016 cm_info.ipv4 = true; 3017 cm_info.tos = iph->ip_tos; 3018 } else { 3019 ip6h = (struct ip6_hdr *)rbuf->iph; 3020 irdma_copy_ip_ntohl(cm_info.loc_addr, 3021 ip6h->ip6_dst.__u6_addr.__u6_addr32); 3022 irdma_copy_ip_ntohl(cm_info.rem_addr, 3023 ip6h->ip6_src.__u6_addr.__u6_addr32); 3024 cm_info.ipv4 = false; 3025 cm_info.tos = (ip6h->ip6_vfc << 4) | ip6h->ip6_flow; 3026 } 3027 cm_info.loc_port = ntohs(tcph->th_dport); 3028 cm_info.rem_port = ntohs(tcph->th_sport); 3029 cm_node = irdma_find_node(cm_core, cm_info.rem_port, cm_info.rem_addr, 3030 cm_info.loc_port, cm_info.loc_addr, cm_info.vlan_id); 3031 3032 if (!cm_node) { 3033 /* 3034 * Only type of packet accepted are for the PASSIVE open (syn only) 3035 */ 3036 if (!(tcp_get_flags(tcph) & TH_SYN) || tcp_get_flags(tcph) & TH_ACK) 3037 return; 3038 3039 listener = irdma_find_listener(cm_core, 3040 cm_info.loc_addr, 3041 cm_info.ipv4, 3042 cm_info.loc_port, 3043 cm_info.vlan_id, 3044 IRDMA_CM_LISTENER_ACTIVE_STATE); 3045 if (!listener) { 3046 cm_info.cm_id = NULL; 3047 irdma_debug(&cm_core->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3048 "no listener found\n"); 3049 return; 3050 } 3051 3052 cm_info.cm_id = listener->cm_id; 3053 cm_node = irdma_make_cm_node(cm_core, iwdev, &cm_info, 3054 listener); 3055 if (!cm_node) { 3056 irdma_debug(&cm_core->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3057 "allocate node failed\n"); 3058 atomic_dec(&listener->refcnt); 3059 return; 3060 } 3061 3062 if (!(tcp_get_flags(tcph) & (TH_RST | TH_FIN))) { 3063 cm_node->state = IRDMA_CM_STATE_LISTENING; 3064 } else { 3065 irdma_rem_ref_cm_node(cm_node); 3066 return; 3067 } 3068 3069 atomic_inc(&cm_node->refcnt); 3070 } else if (cm_node->state == IRDMA_CM_STATE_OFFLOADED) { 3071 irdma_rem_ref_cm_node(cm_node); 3072 return; 3073 } 3074 3075 irdma_process_pkt(cm_node, rbuf); 3076 irdma_rem_ref_cm_node(cm_node); 3077 } 3078 3079 static int 3080 irdma_add_qh(struct irdma_cm_node *cm_node, bool active) 3081 { 3082 if (!active) 3083 irdma_add_conn_est_qh(cm_node); 3084 return 0; 3085 } 3086 3087 static void 3088 irdma_cm_free_ah_nop(struct irdma_cm_node *cm_node) 3089 { 3090 } 3091 3092 /** 3093 * irdma_setup_cm_core - setup top level instance of a cm core 3094 * @iwdev: iwarp device structure 3095 * @rdma_ver: HW version 3096 */ 3097 int 3098 irdma_setup_cm_core(struct irdma_device *iwdev, u8 rdma_ver) 3099 { 3100 struct irdma_cm_core *cm_core = &iwdev->cm_core; 3101 3102 cm_core->iwdev = iwdev; 3103 cm_core->dev = &iwdev->rf->sc_dev; 3104 3105 /* Handles CM event work items send to Iwarp core */ 3106 cm_core->event_wq = alloc_ordered_workqueue("iwarp-event-wq", 0); 3107 if (!cm_core->event_wq) 3108 return -ENOMEM; 3109 3110 INIT_LIST_HEAD(&cm_core->listen_list); 3111 3112 timer_setup(&cm_core->tcp_timer, irdma_cm_timer_tick, 0); 3113 3114 spin_lock_init(&cm_core->ht_lock); 3115 spin_lock_init(&cm_core->listen_list_lock); 3116 spin_lock_init(&cm_core->apbvt_lock); 3117 switch (rdma_ver) { 3118 case IRDMA_GEN_1: 3119 cm_core->form_cm_frame = irdma_form_uda_cm_frame; 3120 cm_core->cm_create_ah = irdma_add_qh; 3121 cm_core->cm_free_ah = irdma_cm_free_ah_nop; 3122 break; 3123 case IRDMA_GEN_2: 3124 default: 3125 cm_core->form_cm_frame = irdma_form_ah_cm_frame; 3126 cm_core->cm_create_ah = irdma_cm_create_ah; 3127 cm_core->cm_free_ah = irdma_cm_free_ah; 3128 } 3129 3130 return 0; 3131 } 3132 3133 /** 3134 * irdma_cleanup_cm_core - deallocate a top level instance of a 3135 * cm core 3136 * @cm_core: cm's core 3137 */ 3138 void 3139 irdma_cleanup_cm_core(struct irdma_cm_core *cm_core) 3140 { 3141 if (!cm_core) 3142 return; 3143 3144 del_timer_sync(&cm_core->tcp_timer); 3145 3146 destroy_workqueue(cm_core->event_wq); 3147 cm_core->dev->ws_reset(&cm_core->iwdev->vsi); 3148 } 3149 3150 /** 3151 * irdma_init_tcp_ctx - setup qp context 3152 * @cm_node: connection's node 3153 * @tcp_info: offload info for tcp 3154 * @iwqp: associate qp for the connection 3155 */ 3156 static void 3157 irdma_init_tcp_ctx(struct irdma_cm_node *cm_node, 3158 struct irdma_tcp_offload_info *tcp_info, 3159 struct irdma_qp *iwqp) 3160 { 3161 tcp_info->ipv4 = cm_node->ipv4; 3162 tcp_info->drop_ooo_seg = !iwqp->iwdev->iw_ooo; 3163 tcp_info->wscale = true; 3164 tcp_info->ignore_tcp_opt = true; 3165 tcp_info->ignore_tcp_uns_opt = true; 3166 tcp_info->no_nagle = false; 3167 3168 tcp_info->ttl = IRDMA_DEFAULT_TTL; 3169 tcp_info->rtt_var = IRDMA_DEFAULT_RTT_VAR; 3170 tcp_info->ss_thresh = IRDMA_DEFAULT_SS_THRESH; 3171 tcp_info->rexmit_thresh = IRDMA_DEFAULT_REXMIT_THRESH; 3172 3173 tcp_info->tcp_state = IRDMA_TCP_STATE_ESTABLISHED; 3174 tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale; 3175 tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale; 3176 3177 tcp_info->snd_nxt = cm_node->tcp_cntxt.loc_seq_num; 3178 tcp_info->snd_wnd = cm_node->tcp_cntxt.snd_wnd; 3179 tcp_info->rcv_nxt = cm_node->tcp_cntxt.rcv_nxt; 3180 tcp_info->snd_max = cm_node->tcp_cntxt.loc_seq_num; 3181 3182 tcp_info->snd_una = cm_node->tcp_cntxt.loc_seq_num; 3183 tcp_info->cwnd = 2 * cm_node->tcp_cntxt.mss; 3184 tcp_info->snd_wl1 = cm_node->tcp_cntxt.rcv_nxt; 3185 tcp_info->snd_wl2 = cm_node->tcp_cntxt.loc_seq_num; 3186 tcp_info->max_snd_window = cm_node->tcp_cntxt.max_snd_wnd; 3187 tcp_info->rcv_wnd = cm_node->tcp_cntxt.rcv_wnd 3188 << cm_node->tcp_cntxt.rcv_wscale; 3189 3190 tcp_info->flow_label = 0; 3191 tcp_info->snd_mss = (u32)cm_node->tcp_cntxt.mss; 3192 tcp_info->tos = cm_node->tos; 3193 if (cm_node->vlan_id < VLAN_N_VID) { 3194 tcp_info->insert_vlan_tag = true; 3195 tcp_info->vlan_tag = cm_node->vlan_id; 3196 tcp_info->vlan_tag |= cm_node->user_pri << VLAN_PRIO_SHIFT; 3197 } 3198 tcp_info->src_port = cm_node->loc_port; 3199 tcp_info->dst_port = cm_node->rem_port; 3200 tcp_info->arp_idx = (u16)irdma_arp_table(iwqp->iwdev->rf, 3201 cm_node->rem_addr, NULL, 3202 IRDMA_ARP_RESOLVE); 3203 if (cm_node->ipv4) { 3204 tcp_info->dest_ip_addr[3] = cm_node->rem_addr[0]; 3205 tcp_info->local_ipaddr[3] = cm_node->loc_addr[0]; 3206 } else { 3207 memcpy(tcp_info->dest_ip_addr, cm_node->rem_addr, 3208 sizeof(tcp_info->dest_ip_addr)); 3209 memcpy(tcp_info->local_ipaddr, cm_node->loc_addr, 3210 sizeof(tcp_info->local_ipaddr)); 3211 } 3212 } 3213 3214 /** 3215 * irdma_cm_init_tsa_conn - setup qp for RTS 3216 * @iwqp: associate qp for the connection 3217 * @cm_node: connection's node 3218 */ 3219 static void 3220 irdma_cm_init_tsa_conn(struct irdma_qp *iwqp, 3221 struct irdma_cm_node *cm_node) 3222 { 3223 struct irdma_iwarp_offload_info *iwarp_info; 3224 struct irdma_qp_host_ctx_info *ctx_info; 3225 3226 iwarp_info = &iwqp->iwarp_info; 3227 ctx_info = &iwqp->ctx_info; 3228 3229 ctx_info->tcp_info = &iwqp->tcp_info; 3230 ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id; 3231 ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id; 3232 3233 iwarp_info->ord_size = cm_node->ord_size; 3234 iwarp_info->ird_size = cm_node->ird_size; 3235 iwarp_info->rd_en = true; 3236 iwarp_info->rdmap_ver = 1; 3237 iwarp_info->ddp_ver = 1; 3238 iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id; 3239 3240 ctx_info->tcp_info_valid = true; 3241 ctx_info->iwarp_info_valid = true; 3242 ctx_info->user_pri = cm_node->user_pri; 3243 3244 irdma_init_tcp_ctx(cm_node, &iwqp->tcp_info, iwqp); 3245 if (cm_node->snd_mark_en) { 3246 iwarp_info->snd_mark_en = true; 3247 iwarp_info->snd_mark_offset = (iwqp->tcp_info.snd_nxt & SNDMARKER_SEQNMASK) + 3248 cm_node->lsmm_size; 3249 } 3250 3251 cm_node->state = IRDMA_CM_STATE_OFFLOADED; 3252 iwqp->tcp_info.tcp_state = IRDMA_TCP_STATE_ESTABLISHED; 3253 iwqp->tcp_info.src_mac_addr_idx = iwqp->iwdev->mac_ip_table_idx; 3254 3255 if (cm_node->rcv_mark_en) { 3256 iwarp_info->rcv_mark_en = true; 3257 iwarp_info->align_hdrs = true; 3258 } 3259 3260 irdma_sc_qp_setctx(&iwqp->sc_qp, iwqp->host_ctx.va, ctx_info); 3261 3262 /* once tcp_info is set, no need to do it again */ 3263 ctx_info->tcp_info_valid = false; 3264 ctx_info->iwarp_info_valid = false; 3265 } 3266 3267 /** 3268 * irdma_cm_disconn - when a connection is being closed 3269 * @iwqp: associated qp for the connection 3270 */ 3271 void 3272 irdma_cm_disconn(struct irdma_qp *iwqp) 3273 { 3274 struct irdma_device *iwdev = iwqp->iwdev; 3275 struct disconn_work *work; 3276 unsigned long flags; 3277 3278 work = kzalloc(sizeof(*work), GFP_ATOMIC); 3279 if (!work) 3280 return; 3281 3282 spin_lock_irqsave(&iwdev->rf->qptable_lock, flags); 3283 if (!iwdev->rf->qp_table[iwqp->ibqp.qp_num]) { 3284 spin_unlock_irqrestore(&iwdev->rf->qptable_lock, flags); 3285 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3286 "qp_id %d is already freed\n", iwqp->ibqp.qp_num); 3287 kfree(work); 3288 return; 3289 } 3290 irdma_qp_add_ref(&iwqp->ibqp); 3291 spin_unlock_irqrestore(&iwdev->rf->qptable_lock, flags); 3292 3293 work->iwqp = iwqp; 3294 INIT_WORK(&work->work, irdma_disconnect_worker); 3295 queue_work(iwdev->cleanup_wq, &work->work); 3296 } 3297 3298 /** 3299 * irdma_qp_disconnect - free qp and close cm 3300 * @iwqp: associate qp for the connection 3301 */ 3302 static void 3303 irdma_qp_disconnect(struct irdma_qp *iwqp) 3304 { 3305 struct irdma_device *iwdev = iwqp->iwdev; 3306 3307 iwqp->active_conn = 0; 3308 /* close the CM node down if it is still active */ 3309 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, "Call close API\n"); 3310 irdma_cm_close(iwqp->cm_node); 3311 } 3312 3313 /** 3314 * irdma_cm_disconn_true - called by worker thread to disconnect qp 3315 * @iwqp: associate qp for the connection 3316 */ 3317 static void 3318 irdma_cm_disconn_true(struct irdma_qp *iwqp) 3319 { 3320 struct iw_cm_id *cm_id; 3321 struct irdma_device *iwdev; 3322 struct irdma_sc_qp *qp = &iwqp->sc_qp; 3323 u16 last_ae; 3324 u8 original_hw_tcp_state; 3325 u8 original_ibqp_state; 3326 int disconn_status = 0; 3327 int issue_disconn = 0; 3328 int issue_close = 0; 3329 int issue_flush = 0; 3330 unsigned long flags; 3331 int err; 3332 3333 iwdev = iwqp->iwdev; 3334 spin_lock_irqsave(&iwqp->lock, flags); 3335 if (rdma_protocol_roce(&iwdev->ibdev, 1)) { 3336 struct ib_qp_attr attr; 3337 3338 if (iwqp->flush_issued || iwqp->sc_qp.qp_uk.destroy_pending) { 3339 spin_unlock_irqrestore(&iwqp->lock, flags); 3340 return; 3341 } 3342 3343 spin_unlock_irqrestore(&iwqp->lock, flags); 3344 3345 attr.qp_state = IB_QPS_ERR; 3346 irdma_modify_qp_roce(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); 3347 irdma_ib_qp_event(iwqp, qp->event_type); 3348 return; 3349 } 3350 3351 cm_id = iwqp->cm_id; 3352 original_hw_tcp_state = iwqp->hw_tcp_state; 3353 original_ibqp_state = iwqp->ibqp_state; 3354 last_ae = iwqp->last_aeq; 3355 3356 if (qp->term_flags) { 3357 issue_disconn = 1; 3358 issue_close = 1; 3359 iwqp->cm_id = NULL; 3360 irdma_terminate_del_timer(qp); 3361 if (!iwqp->flush_issued) { 3362 iwqp->flush_issued = 1; 3363 issue_flush = 1; 3364 } 3365 } else if ((original_hw_tcp_state == IRDMA_TCP_STATE_CLOSE_WAIT) || 3366 ((original_ibqp_state == IB_QPS_RTS) && 3367 (last_ae == IRDMA_AE_LLP_CONNECTION_RESET))) { 3368 issue_disconn = 1; 3369 if (last_ae == IRDMA_AE_LLP_CONNECTION_RESET) 3370 disconn_status = -ECONNRESET; 3371 } 3372 3373 if (original_hw_tcp_state == IRDMA_TCP_STATE_CLOSED || 3374 original_hw_tcp_state == IRDMA_TCP_STATE_TIME_WAIT || 3375 last_ae == IRDMA_AE_RDMAP_ROE_BAD_LLP_CLOSE || 3376 last_ae == IRDMA_AE_BAD_CLOSE || 3377 last_ae == IRDMA_AE_LLP_CONNECTION_RESET || iwdev->rf->reset || !cm_id) { 3378 issue_close = 1; 3379 iwqp->cm_id = NULL; 3380 qp->term_flags = 0; 3381 if (!iwqp->flush_issued) { 3382 iwqp->flush_issued = 1; 3383 issue_flush = 1; 3384 } 3385 } 3386 3387 spin_unlock_irqrestore(&iwqp->lock, flags); 3388 if (issue_flush && !iwqp->sc_qp.qp_uk.destroy_pending) { 3389 irdma_flush_wqes(iwqp, IRDMA_FLUSH_SQ | IRDMA_FLUSH_RQ | 3390 IRDMA_FLUSH_WAIT); 3391 3392 if (qp->term_flags) 3393 irdma_ib_qp_event(iwqp, qp->event_type); 3394 } 3395 3396 if (!cm_id || !cm_id->event_handler) 3397 return; 3398 3399 spin_lock_irqsave(&iwdev->cm_core.ht_lock, flags); 3400 if (!iwqp->cm_node) { 3401 spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags); 3402 return; 3403 } 3404 atomic_inc(&iwqp->cm_node->refcnt); 3405 3406 spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags); 3407 3408 if (issue_disconn) { 3409 err = irdma_send_cm_event(iwqp->cm_node, cm_id, 3410 IW_CM_EVENT_DISCONNECT, 3411 disconn_status); 3412 if (err) 3413 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3414 "disconnect event failed: - cm_id = %p\n", 3415 cm_id); 3416 } 3417 if (issue_close) { 3418 cm_id->provider_data = iwqp; 3419 err = irdma_send_cm_event(iwqp->cm_node, cm_id, 3420 IW_CM_EVENT_CLOSE, 0); 3421 if (err) 3422 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3423 "close event failed: - cm_id = %p\n", 3424 cm_id); 3425 irdma_qp_disconnect(iwqp); 3426 } 3427 irdma_rem_ref_cm_node(iwqp->cm_node); 3428 } 3429 3430 /** 3431 * irdma_disconnect_worker - worker for connection close 3432 * @work: points or disconn structure 3433 */ 3434 static void 3435 irdma_disconnect_worker(struct work_struct *work) 3436 { 3437 struct disconn_work *dwork = container_of(work, struct disconn_work, work); 3438 struct irdma_qp *iwqp = dwork->iwqp; 3439 3440 kfree(dwork); 3441 irdma_cm_disconn_true(iwqp); 3442 irdma_qp_rem_ref(&iwqp->ibqp); 3443 } 3444 3445 /** 3446 * irdma_free_lsmm_rsrc - free lsmm memory and deregister 3447 * @iwqp: associate qp for the connection 3448 */ 3449 void 3450 irdma_free_lsmm_rsrc(struct irdma_qp *iwqp) 3451 { 3452 struct irdma_device *iwdev; 3453 3454 iwdev = iwqp->iwdev; 3455 3456 if (iwqp->ietf_mem.va) { 3457 if (iwqp->lsmm_mr) 3458 iwdev->ibdev.dereg_mr(iwqp->lsmm_mr, NULL); 3459 3460 irdma_free_dma_mem(iwdev->rf->sc_dev.hw, 3461 &iwqp->ietf_mem); 3462 iwqp->ietf_mem.va = NULL; 3463 } 3464 } 3465 3466 /** 3467 * irdma_accept - registered call for connection to be accepted 3468 * @cm_id: cm information for passive connection 3469 * @conn_param: accpet parameters 3470 */ 3471 int 3472 irdma_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) 3473 { 3474 struct ib_qp *ibqp; 3475 struct irdma_qp *iwqp; 3476 struct irdma_device *iwdev; 3477 struct irdma_sc_dev *dev; 3478 struct irdma_cm_node *cm_node; 3479 struct ib_qp_attr attr = {0}; 3480 int passive_state; 3481 struct ib_mr *ibmr; 3482 struct irdma_pd *iwpd; 3483 u16 buf_len = 0; 3484 struct irdma_kmem_info accept; 3485 u64 tagged_offset; 3486 int wait_ret; 3487 int ret = 0; 3488 3489 ibqp = irdma_get_qp(cm_id->device, conn_param->qpn); 3490 if (!ibqp) 3491 return -EINVAL; 3492 3493 iwqp = to_iwqp(ibqp); 3494 iwdev = iwqp->iwdev; 3495 dev = &iwdev->rf->sc_dev; 3496 cm_node = cm_id->provider_data; 3497 3498 if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) { 3499 cm_node->ipv4 = true; 3500 cm_node->vlan_id = irdma_get_vlan_ipv4(cm_id, cm_node->loc_addr); 3501 } else { 3502 cm_node->ipv4 = false; 3503 irdma_get_vlan_mac_ipv6(cm_id, cm_node->loc_addr, &cm_node->vlan_id, 3504 NULL); 3505 } 3506 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, "Accept vlan_id=%d\n", 3507 cm_node->vlan_id); 3508 3509 if (cm_node->state == IRDMA_CM_STATE_LISTENER_DESTROYED) { 3510 ret = -EINVAL; 3511 goto error; 3512 } 3513 3514 passive_state = atomic_add_return(1, &cm_node->passive_state); 3515 if (passive_state == IRDMA_SEND_RESET_EVENT) { 3516 ret = -ECONNRESET; 3517 goto error; 3518 } 3519 3520 buf_len = conn_param->private_data_len + IRDMA_MAX_IETF_SIZE; 3521 iwqp->ietf_mem.size = buf_len; 3522 iwqp->ietf_mem.va = irdma_allocate_dma_mem(dev->hw, &iwqp->ietf_mem, 3523 iwqp->ietf_mem.size, 1); 3524 if (!iwqp->ietf_mem.va) { 3525 ret = -ENOMEM; 3526 goto error; 3527 } 3528 3529 cm_node->pdata.size = conn_param->private_data_len; 3530 accept.addr = iwqp->ietf_mem.va; 3531 accept.size = irdma_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY); 3532 memcpy((u8 *)accept.addr + accept.size, conn_param->private_data, 3533 conn_param->private_data_len); 3534 3535 if (cm_node->dev->ws_add(iwqp->sc_qp.vsi, cm_node->user_pri)) { 3536 ret = -ENOMEM; 3537 goto error; 3538 } 3539 iwqp->sc_qp.user_pri = cm_node->user_pri; 3540 irdma_qp_add_qos(&iwqp->sc_qp); 3541 if (cm_node->dev->hw_attrs.uk_attrs.hw_rev == IRDMA_GEN_2) 3542 iwdev->rf->check_fc(&iwdev->vsi, &iwqp->sc_qp); 3543 /* setup our first outgoing iWarp send WQE (the IETF frame response) */ 3544 iwpd = iwqp->iwpd; 3545 tagged_offset = (uintptr_t)iwqp->ietf_mem.va; 3546 ibmr = irdma_reg_phys_mr(&iwpd->ibpd, iwqp->ietf_mem.pa, buf_len, 3547 IB_ACCESS_LOCAL_WRITE, &tagged_offset); 3548 if (IS_ERR(ibmr)) { 3549 ret = -ENOMEM; 3550 goto error; 3551 } 3552 3553 ibmr->pd = &iwpd->ibpd; 3554 ibmr->device = iwpd->ibpd.device; 3555 iwqp->lsmm_mr = ibmr; 3556 if (iwqp->page) 3557 iwqp->sc_qp.qp_uk.sq_base = kmap_local_page(iwqp->page); 3558 3559 cm_node->lsmm_size = accept.size + conn_param->private_data_len; 3560 irdma_sc_send_lsmm(&iwqp->sc_qp, iwqp->ietf_mem.va, cm_node->lsmm_size, 3561 ibmr->lkey); 3562 3563 if (iwqp->page) 3564 kunmap_local(iwqp->sc_qp.qp_uk.sq_base); 3565 3566 iwqp->cm_id = cm_id; 3567 cm_node->cm_id = cm_id; 3568 3569 cm_id->provider_data = iwqp; 3570 iwqp->active_conn = 0; 3571 iwqp->cm_node = cm_node; 3572 cm_node->iwqp = iwqp; 3573 irdma_cm_init_tsa_conn(iwqp, cm_node); 3574 irdma_qp_add_ref(&iwqp->ibqp); 3575 cm_id->add_ref(cm_id); 3576 3577 attr.qp_state = IB_QPS_RTS; 3578 cm_node->qhash_set = false; 3579 cm_node->cm_core->cm_free_ah(cm_node); 3580 3581 irdma_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); 3582 if (dev->hw_attrs.uk_attrs.feature_flags & IRDMA_FEATURE_RTS_AE) { 3583 wait_ret = wait_event_interruptible_timeout(iwqp->waitq, 3584 iwqp->rts_ae_rcvd, 3585 IRDMA_MAX_TIMEOUT); 3586 if (!wait_ret) { 3587 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3588 "Slow Connection: cm_node=%p, loc_port=%d, rem_port=%d, cm_id=%p\n", 3589 cm_node, cm_node->loc_port, 3590 cm_node->rem_port, cm_node->cm_id); 3591 ret = -ECONNRESET; 3592 goto error; 3593 } 3594 } 3595 3596 irdma_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0); 3597 cm_node->accelerated = true; 3598 complete(&cm_node->establish_comp); 3599 3600 if (cm_node->accept_pend) { 3601 atomic_dec(&cm_node->listener->pend_accepts_cnt); 3602 cm_node->accept_pend = 0; 3603 } 3604 3605 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3606 "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", 3607 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr[0], 3608 cm_node->loc_addr[0], cm_node, cm_id, ibqp->qp_num); 3609 cm_node->cm_core->stats_accepts++; 3610 3611 return 0; 3612 error: 3613 irdma_free_lsmm_rsrc(iwqp); 3614 irdma_rem_ref_cm_node(cm_node); 3615 3616 return ret; 3617 } 3618 3619 /** 3620 * irdma_reject - registered call for connection to be rejected 3621 * @cm_id: cm information for passive connection 3622 * @pdata: private data to be sent 3623 * @pdata_len: private data length 3624 */ 3625 int 3626 irdma_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len) 3627 { 3628 struct irdma_device *iwdev; 3629 struct irdma_cm_node *cm_node; 3630 3631 cm_node = cm_id->provider_data; 3632 cm_node->pdata.size = pdata_len; 3633 3634 iwdev = to_iwdev(cm_id->device); 3635 if (!iwdev) 3636 return -EINVAL; 3637 3638 cm_node->cm_core->stats_rejects++; 3639 3640 if (pdata_len + sizeof(struct ietf_mpa_v2) > IRDMA_MAX_CM_BUF) 3641 return -EINVAL; 3642 3643 return irdma_cm_reject(cm_node, pdata, pdata_len); 3644 } 3645 3646 /** 3647 * irdma_connect - registered call for connection to be established 3648 * @cm_id: cm information for passive connection 3649 * @conn_param: Information about the connection 3650 */ 3651 int 3652 irdma_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) 3653 { 3654 struct ib_qp *ibqp; 3655 struct irdma_qp *iwqp; 3656 struct irdma_device *iwdev; 3657 struct irdma_cm_node *cm_node; 3658 struct irdma_cm_info cm_info; 3659 struct sockaddr_in *laddr; 3660 struct sockaddr_in *raddr; 3661 struct sockaddr_in6 *laddr6; 3662 struct sockaddr_in6 *raddr6; 3663 int ret = 0; 3664 3665 ibqp = irdma_get_qp(cm_id->device, conn_param->qpn); 3666 if (!ibqp) 3667 return -EINVAL; 3668 iwqp = to_iwqp(ibqp); 3669 if (!iwqp) 3670 return -EINVAL; 3671 iwdev = iwqp->iwdev; 3672 if (!iwdev) 3673 return -EINVAL; 3674 3675 laddr = (struct sockaddr_in *)&cm_id->m_local_addr; 3676 raddr = (struct sockaddr_in *)&cm_id->m_remote_addr; 3677 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr; 3678 raddr6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr; 3679 3680 if (!(laddr->sin_port) || !(raddr->sin_port)) 3681 return -EINVAL; 3682 3683 iwqp->active_conn = 1; 3684 iwqp->cm_id = NULL; 3685 cm_id->provider_data = iwqp; 3686 3687 /* set up the connection params for the node */ 3688 if (cm_id->remote_addr.ss_family == AF_INET) { 3689 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV4) 3690 return -EINVAL; 3691 3692 cm_info.ipv4 = true; 3693 memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr)); 3694 memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr)); 3695 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr); 3696 cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr); 3697 cm_info.loc_port = ntohs(laddr->sin_port); 3698 cm_info.rem_port = ntohs(raddr->sin_port); 3699 cm_info.vlan_id = irdma_get_vlan_ipv4(cm_id, cm_info.loc_addr); 3700 } else { 3701 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV6) 3702 return -EINVAL; 3703 3704 cm_info.ipv4 = false; 3705 irdma_copy_ip_ntohl(cm_info.loc_addr, 3706 laddr6->sin6_addr.__u6_addr.__u6_addr32); 3707 irdma_copy_ip_ntohl(cm_info.rem_addr, 3708 raddr6->sin6_addr.__u6_addr.__u6_addr32); 3709 cm_info.loc_port = ntohs(laddr6->sin6_port); 3710 cm_info.rem_port = ntohs(raddr6->sin6_port); 3711 irdma_get_vlan_mac_ipv6(cm_id, cm_info.loc_addr, &cm_info.vlan_id, NULL); 3712 } 3713 cm_info.cm_id = cm_id; 3714 cm_info.qh_qpid = iwdev->vsi.ilq->qp_id; 3715 cm_info.tos = cm_id->tos; 3716 if (iwdev->vsi.dscp_mode) { 3717 cm_info.user_pri = 3718 iwqp->sc_qp.vsi->dscp_map[irdma_tos2dscp(cm_info.tos)]; 3719 } else { 3720 cm_info.user_pri = rt_tos2priority(cm_id->tos); 3721 cm_info.user_pri = 3722 irdma_iw_get_vlan_prio(cm_info.loc_addr, 3723 cm_info.user_pri, 3724 cm_info.ipv4); 3725 } 3726 3727 if (iwqp->sc_qp.dev->ws_add(iwqp->sc_qp.vsi, cm_info.user_pri)) 3728 return -ENOMEM; 3729 iwqp->sc_qp.user_pri = cm_info.user_pri; 3730 irdma_qp_add_qos(&iwqp->sc_qp); 3731 if (iwdev->rf->sc_dev.hw_attrs.uk_attrs.hw_rev == IRDMA_GEN_2) 3732 iwdev->rf->check_fc(&iwdev->vsi, &iwqp->sc_qp); 3733 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_DCB, "TOS:[%d] UP:[%d]\n", 3734 cm_id->tos, cm_info.user_pri); 3735 3736 ret = irdma_create_cm_node(&iwdev->cm_core, iwdev, conn_param, &cm_info, 3737 &cm_node); 3738 if (ret) 3739 return ret; 3740 ret = cm_node->cm_core->cm_create_ah(cm_node, true); 3741 if (ret) 3742 goto err; 3743 if (irdma_manage_qhash(iwdev, &cm_info, 3744 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 3745 IRDMA_QHASH_MANAGE_TYPE_ADD, NULL, true)) { 3746 ret = -EINVAL; 3747 goto err; 3748 } 3749 cm_node->qhash_set = true; 3750 3751 cm_node->apbvt_entry = irdma_add_apbvt(iwdev, cm_info.loc_port); 3752 if (!cm_node->apbvt_entry) { 3753 ret = -EINVAL; 3754 goto err; 3755 } 3756 3757 cm_node->apbvt_set = true; 3758 iwqp->cm_node = cm_node; 3759 cm_node->iwqp = iwqp; 3760 iwqp->cm_id = cm_id; 3761 irdma_qp_add_ref(&iwqp->ibqp); 3762 cm_id->add_ref(cm_id); 3763 3764 if (cm_node->state != IRDMA_CM_STATE_OFFLOADED) { 3765 cm_node->state = IRDMA_CM_STATE_SYN_SENT; 3766 ret = irdma_send_syn(cm_node, 0); 3767 if (ret) 3768 goto err; 3769 } 3770 3771 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3772 "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", 3773 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr[0], 3774 cm_node->loc_addr[0], cm_node, cm_id, ibqp->qp_num); 3775 3776 return 0; 3777 3778 err: 3779 if (cm_info.ipv4) 3780 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3781 "connect() FAILED: dest addr=%x", 3782 cm_info.rem_addr[0]); 3783 else 3784 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3785 "connect() FAILED: dest addr=%x:%x:%x:%x", 3786 IRDMA_PRINT_IP6(cm_info.rem_addr)); 3787 irdma_rem_ref_cm_node(cm_node); 3788 iwdev->cm_core.stats_connect_errs++; 3789 3790 return ret; 3791 } 3792 3793 /** 3794 * irdma_create_listen - registered call creating listener 3795 * @cm_id: cm information for passive connection 3796 * @backlog: to max accept pending count 3797 */ 3798 int 3799 irdma_create_listen(struct iw_cm_id *cm_id, int backlog) 3800 { 3801 struct irdma_device *iwdev; 3802 struct irdma_cm_listener *cm_listen_node; 3803 struct irdma_cm_info cm_info = {0}; 3804 struct sockaddr_in *laddr; 3805 struct sockaddr_in6 *laddr6; 3806 bool wildcard = false; 3807 int err; 3808 3809 iwdev = to_iwdev(cm_id->device); 3810 if (!iwdev) 3811 return -EINVAL; 3812 3813 laddr = (struct sockaddr_in *)&cm_id->m_local_addr; 3814 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr; 3815 cm_info.qh_qpid = iwdev->vsi.ilq->qp_id; 3816 3817 if (laddr->sin_family == AF_INET) { 3818 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV4) 3819 return -EINVAL; 3820 3821 cm_info.ipv4 = true; 3822 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr); 3823 cm_info.loc_port = ntohs(laddr->sin_port); 3824 3825 if (laddr->sin_addr.s_addr != htonl(INADDR_ANY)) { 3826 cm_info.vlan_id = irdma_get_vlan_ipv4(cm_id, cm_info.loc_addr); 3827 } else { 3828 cm_info.vlan_id = 0xFFFF; 3829 wildcard = true; 3830 } 3831 } else { 3832 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV6) 3833 return -EINVAL; 3834 3835 cm_info.ipv4 = false; 3836 irdma_copy_ip_ntohl(cm_info.loc_addr, 3837 laddr6->sin6_addr.__u6_addr.__u6_addr32); 3838 cm_info.loc_port = ntohs(laddr6->sin6_port); 3839 if (!IN6_IS_ADDR_UNSPECIFIED(&laddr6->sin6_addr)) { 3840 irdma_get_vlan_mac_ipv6(cm_id, cm_info.loc_addr, 3841 &cm_info.vlan_id, NULL); 3842 } else { 3843 cm_info.vlan_id = 0xFFFF; 3844 wildcard = true; 3845 } 3846 } 3847 3848 if (cm_info.vlan_id >= VLAN_N_VID && iwdev->dcb_vlan_mode) 3849 cm_info.vlan_id = 0; 3850 cm_info.backlog = backlog; 3851 cm_info.cm_id = cm_id; 3852 3853 cm_listen_node = irdma_make_listen_node(&iwdev->cm_core, iwdev, 3854 &cm_info); 3855 if (!cm_listen_node) { 3856 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3857 "cm_listen_node == NULL\n"); 3858 return -ENOMEM; 3859 } 3860 3861 cm_id->provider_data = cm_listen_node; 3862 3863 cm_listen_node->tos = cm_id->tos; 3864 if (iwdev->vsi.dscp_mode) 3865 cm_listen_node->user_pri = 3866 iwdev->vsi.dscp_map[irdma_tos2dscp(cm_id->tos)]; 3867 else 3868 cm_listen_node->user_pri = rt_tos2priority(cm_id->tos); 3869 cm_info.user_pri = cm_listen_node->user_pri; 3870 if (!cm_listen_node->reused_node) { 3871 if (wildcard) { 3872 err = irdma_add_mqh(iwdev, &cm_info, cm_listen_node); 3873 if (err) 3874 goto error; 3875 } else { 3876 if (!iwdev->vsi.dscp_mode) 3877 cm_info.user_pri = cm_listen_node->user_pri = 3878 irdma_iw_get_vlan_prio(cm_info.loc_addr, 3879 cm_info.user_pri, 3880 cm_info.ipv4); 3881 err = irdma_manage_qhash(iwdev, &cm_info, 3882 IRDMA_QHASH_TYPE_TCP_SYN, 3883 IRDMA_QHASH_MANAGE_TYPE_ADD, 3884 NULL, true); 3885 if (err) 3886 goto error; 3887 3888 cm_listen_node->qhash_set = true; 3889 } 3890 3891 cm_listen_node->apbvt_entry = irdma_add_apbvt(iwdev, 3892 cm_info.loc_port); 3893 if (!cm_listen_node->apbvt_entry) 3894 goto error; 3895 } 3896 cm_id->add_ref(cm_id); 3897 cm_listen_node->cm_core->stats_listen_created++; 3898 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3899 "loc_port=0x%04x loc_addr=%x cm_listen_node=%p cm_id=%p qhash_set=%d vlan_id=%d\n", 3900 cm_listen_node->loc_port, cm_listen_node->loc_addr[0], 3901 cm_listen_node, cm_listen_node->cm_id, 3902 cm_listen_node->qhash_set, cm_listen_node->vlan_id); 3903 3904 return 0; 3905 3906 error: 3907 3908 irdma_cm_del_listen(&iwdev->cm_core, cm_listen_node, false); 3909 3910 return -EINVAL; 3911 } 3912 3913 /** 3914 * irdma_destroy_listen - registered call to destroy listener 3915 * @cm_id: cm information for passive connection 3916 */ 3917 int 3918 irdma_destroy_listen(struct iw_cm_id *cm_id) 3919 { 3920 struct irdma_device *iwdev; 3921 3922 iwdev = to_iwdev(cm_id->device); 3923 if (cm_id->provider_data) 3924 irdma_cm_del_listen(&iwdev->cm_core, cm_id->provider_data, 3925 true); 3926 else 3927 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3928 "cm_id->provider_data was NULL\n"); 3929 3930 cm_id->rem_ref(cm_id); 3931 3932 return 0; 3933 } 3934 3935 /** 3936 * irdma_iw_teardown_list_prep - add conn nodes slated for tear 3937 * down to list 3938 * @cm_core: cm's core 3939 * @teardown_list: a list to which cm_node will be selected 3940 * @ipaddr: pointer to ip address 3941 * @nfo: pointer to cm_info structure instance 3942 * @disconnect_all: flag indicating disconnect all QPs 3943 */ 3944 static void 3945 irdma_iw_teardown_list_prep(struct irdma_cm_core *cm_core, 3946 struct list_head *teardown_list, 3947 u32 *ipaddr, 3948 struct irdma_cm_info *nfo, 3949 bool disconnect_all) 3950 { 3951 struct irdma_cm_node *cm_node; 3952 int bkt; 3953 3954 HASH_FOR_EACH_RCU(cm_core->cm_hash_tbl, bkt, cm_node, list) { 3955 if ((disconnect_all || 3956 (nfo->vlan_id == cm_node->vlan_id && 3957 !memcmp(cm_node->loc_addr, ipaddr, nfo->ipv4 ? 4 : 16))) && 3958 atomic_inc_not_zero(&cm_node->refcnt)) 3959 list_add(&cm_node->teardown_entry, teardown_list); 3960 } 3961 } 3962 3963 static inline bool 3964 irdma_ip_vlan_match(u32 *ip1, u16 vlan_id1, 3965 bool check_vlan, u32 *ip2, 3966 u16 vlan_id2, bool ipv4) 3967 { 3968 return (!check_vlan || vlan_id1 == vlan_id2) && 3969 !memcmp(ip1, ip2, ipv4 ? 4 : 16); 3970 } 3971 3972 /** 3973 * irdma_roce_teardown_list_prep - add conn nodes slated for 3974 * tear down to list 3975 * @iwdev: RDMA device 3976 * @teardown_list: a list to which cm_node will be selected 3977 * @ipaddr: pointer to ip address 3978 * @nfo: pointer to cm_info structure instance 3979 * @disconnect_all: flag indicating disconnect all QPs 3980 */ 3981 static void 3982 irdma_roce_teardown_list_prep(struct irdma_device *iwdev, 3983 struct list_head *teardown_list, 3984 u32 *ipaddr, 3985 struct irdma_cm_info *nfo, 3986 bool disconnect_all) 3987 { 3988 struct irdma_sc_vsi *vsi = &iwdev->vsi; 3989 struct irdma_sc_qp *sc_qp; 3990 struct list_head *list_node; 3991 struct irdma_qp *qp; 3992 unsigned long flags; 3993 int i; 3994 3995 for (i = 0; i < IRDMA_MAX_USER_PRIORITY; i++) { 3996 mutex_lock(&vsi->qos[i].qos_mutex); 3997 list_for_each(list_node, &vsi->qos[i].qplist) { 3998 u32 qp_ip[4]; 3999 4000 sc_qp = container_of(list_node, struct irdma_sc_qp, 4001 list); 4002 if (sc_qp->qp_uk.qp_type != IRDMA_QP_TYPE_ROCE_RC) 4003 continue; 4004 4005 qp = sc_qp->qp_uk.back_qp; 4006 if (!disconnect_all) { 4007 if (nfo->ipv4) 4008 qp_ip[0] = qp->udp_info.local_ipaddr[3]; 4009 else 4010 memcpy(qp_ip, 4011 &qp->udp_info.local_ipaddr[0], 4012 sizeof(qp_ip)); 4013 } 4014 4015 if (disconnect_all || 4016 irdma_ip_vlan_match(qp_ip, 4017 qp->udp_info.vlan_tag & EVL_VLID_MASK, 4018 qp->udp_info.insert_vlan_tag, 4019 ipaddr, nfo->vlan_id, nfo->ipv4)) { 4020 spin_lock_irqsave(&iwdev->rf->qptable_lock, flags); 4021 if (iwdev->rf->qp_table[sc_qp->qp_uk.qp_id]) { 4022 irdma_qp_add_ref(&qp->ibqp); 4023 list_add(&qp->teardown_entry, teardown_list); 4024 } 4025 spin_unlock_irqrestore(&iwdev->rf->qptable_lock, flags); 4026 } 4027 } 4028 mutex_unlock(&vsi->qos[i].qos_mutex); 4029 } 4030 } 4031 4032 /** 4033 * irdma_cm_event_connected - handle connected active node 4034 * @event: the info for cm_node of connection 4035 */ 4036 static void 4037 irdma_cm_event_connected(struct irdma_cm_event *event) 4038 { 4039 struct irdma_qp *iwqp; 4040 struct irdma_device *iwdev; 4041 struct irdma_cm_node *cm_node; 4042 struct irdma_sc_dev *dev; 4043 struct ib_qp_attr attr = {0}; 4044 struct iw_cm_id *cm_id; 4045 int status; 4046 bool read0; 4047 int wait_ret = 0; 4048 4049 cm_node = event->cm_node; 4050 cm_id = cm_node->cm_id; 4051 iwqp = cm_id->provider_data; 4052 iwdev = iwqp->iwdev; 4053 dev = &iwdev->rf->sc_dev; 4054 if (iwqp->sc_qp.qp_uk.destroy_pending) { 4055 status = -ETIMEDOUT; 4056 goto error; 4057 } 4058 4059 irdma_cm_init_tsa_conn(iwqp, cm_node); 4060 read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO); 4061 if (iwqp->page) 4062 iwqp->sc_qp.qp_uk.sq_base = kmap_local_page(iwqp->page); 4063 irdma_sc_send_rtt(&iwqp->sc_qp, read0); 4064 if (iwqp->page) 4065 kunmap_local(iwqp->sc_qp.qp_uk.sq_base); 4066 4067 attr.qp_state = IB_QPS_RTS; 4068 cm_node->qhash_set = false; 4069 irdma_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); 4070 if (dev->hw_attrs.uk_attrs.feature_flags & IRDMA_FEATURE_RTS_AE) { 4071 wait_ret = wait_event_interruptible_timeout(iwqp->waitq, 4072 iwqp->rts_ae_rcvd, 4073 IRDMA_MAX_TIMEOUT); 4074 if (!wait_ret) 4075 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 4076 "Slow Connection: cm_node=%p, loc_port=%d, rem_port=%d, cm_id=%p\n", 4077 cm_node, cm_node->loc_port, 4078 cm_node->rem_port, cm_node->cm_id); 4079 } 4080 4081 irdma_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 0); 4082 cm_node->accelerated = true; 4083 complete(&cm_node->establish_comp); 4084 cm_node->cm_core->cm_free_ah(cm_node); 4085 return; 4086 4087 error: 4088 iwqp->cm_id = NULL; 4089 cm_id->provider_data = NULL; 4090 irdma_send_cm_event(event->cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 4091 status); 4092 irdma_rem_ref_cm_node(event->cm_node); 4093 } 4094 4095 /** 4096 * irdma_cm_event_reset - handle reset 4097 * @event: the info for cm_node of connection 4098 */ 4099 static void 4100 irdma_cm_event_reset(struct irdma_cm_event *event) 4101 { 4102 struct irdma_cm_node *cm_node = event->cm_node; 4103 struct iw_cm_id *cm_id = cm_node->cm_id; 4104 struct irdma_qp *iwqp; 4105 4106 if (!cm_id) 4107 return; 4108 4109 iwqp = cm_id->provider_data; 4110 if (!iwqp) 4111 return; 4112 4113 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 4114 "reset event %p - cm_id = %p\n", event->cm_node, cm_id); 4115 iwqp->cm_id = NULL; 4116 4117 irdma_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT, 4118 -ECONNRESET); 4119 irdma_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0); 4120 } 4121 4122 /** 4123 * irdma_cm_event_handler - send event to cm upper layer 4124 * @work: pointer of cm event info. 4125 */ 4126 static void 4127 irdma_cm_event_handler(struct work_struct *work) 4128 { 4129 struct irdma_cm_event *event = container_of(work, struct irdma_cm_event, event_work); 4130 struct irdma_cm_node *cm_node; 4131 4132 if (!event || !event->cm_node || !event->cm_node->cm_core) 4133 return; 4134 4135 cm_node = event->cm_node; 4136 4137 switch (event->type) { 4138 case IRDMA_CM_EVENT_MPA_REQ: 4139 irdma_send_cm_event(cm_node, cm_node->cm_id, 4140 IW_CM_EVENT_CONNECT_REQUEST, 0); 4141 break; 4142 case IRDMA_CM_EVENT_RESET: 4143 irdma_cm_event_reset(event); 4144 break; 4145 case IRDMA_CM_EVENT_CONNECTED: 4146 if (!event->cm_node->cm_id || 4147 event->cm_node->state != IRDMA_CM_STATE_OFFLOADED) 4148 break; 4149 irdma_cm_event_connected(event); 4150 break; 4151 case IRDMA_CM_EVENT_MPA_REJECT: 4152 if (!event->cm_node->cm_id || 4153 cm_node->state == IRDMA_CM_STATE_OFFLOADED) 4154 break; 4155 irdma_send_cm_event(cm_node, cm_node->cm_id, 4156 IW_CM_EVENT_CONNECT_REPLY, -ECONNREFUSED); 4157 break; 4158 case IRDMA_CM_EVENT_ABORTED: 4159 if (!event->cm_node->cm_id || 4160 event->cm_node->state == IRDMA_CM_STATE_OFFLOADED) 4161 break; 4162 irdma_event_connect_error(event); 4163 break; 4164 default: 4165 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 4166 "bad event type = %d\n", event->type); 4167 break; 4168 } 4169 4170 irdma_rem_ref_cm_node(event->cm_node); 4171 kfree(event); 4172 } 4173 4174 /** 4175 * irdma_cm_post_event - queue event request for worker thread 4176 * @event: cm node's info for up event call 4177 */ 4178 static void 4179 irdma_cm_post_event(struct irdma_cm_event *event) 4180 { 4181 atomic_inc(&event->cm_node->refcnt); 4182 INIT_WORK(&event->event_work, irdma_cm_event_handler); 4183 queue_work(event->cm_node->cm_core->event_wq, &event->event_work); 4184 } 4185 4186 /** 4187 * irdma_cm_teardown_connections - teardown QPs 4188 * @iwdev: device pointer 4189 * @ipaddr: Pointer to IPv4 or IPv6 address 4190 * @nfo: Connection info 4191 * @disconnect_all: flag indicating disconnect all QPs 4192 * 4193 * teardown QPs where source or destination addr matches ip addr 4194 */ 4195 static void __unused 4196 irdma_cm_teardown_connections(struct irdma_device *iwdev, 4197 u32 *ipaddr, 4198 struct irdma_cm_info *nfo, 4199 bool disconnect_all) 4200 { 4201 struct irdma_cm_core *cm_core = &iwdev->cm_core; 4202 struct list_head *list_core_temp; 4203 struct list_head *list_node; 4204 struct irdma_cm_node *cm_node; 4205 struct list_head teardown_list; 4206 struct ib_qp_attr attr; 4207 struct irdma_qp *qp; 4208 4209 INIT_LIST_HEAD(&teardown_list); 4210 4211 rcu_read_lock(); 4212 irdma_iw_teardown_list_prep(cm_core, &teardown_list, ipaddr, nfo, disconnect_all); 4213 rcu_read_unlock(); 4214 4215 attr.qp_state = IB_QPS_ERR; 4216 list_for_each_safe(list_node, list_core_temp, &teardown_list) { 4217 cm_node = container_of(list_node, struct irdma_cm_node, 4218 teardown_entry); 4219 irdma_modify_qp(&cm_node->iwqp->ibqp, &attr, IB_QP_STATE, NULL); 4220 if (iwdev->rf->reset) 4221 irdma_cm_disconn(cm_node->iwqp); 4222 irdma_rem_ref_cm_node(cm_node); 4223 } 4224 4225 if (!rdma_protocol_roce(&iwdev->ibdev, 1)) 4226 return; 4227 4228 INIT_LIST_HEAD(&teardown_list); 4229 irdma_roce_teardown_list_prep(iwdev, &teardown_list, ipaddr, nfo, disconnect_all); 4230 4231 list_for_each_safe(list_node, list_core_temp, &teardown_list) { 4232 qp = container_of(list_node, struct irdma_qp, teardown_entry); 4233 irdma_modify_qp_roce(&qp->ibqp, &attr, IB_QP_STATE, NULL); 4234 irdma_ib_qp_event(qp, IRDMA_QP_EVENT_CATASTROPHIC); 4235 irdma_qp_rem_ref(&qp->ibqp); 4236 } 4237 } 4238