1 /*- 2 * SPDX-License-Identifier: GPL-2.0 or Linux-OpenIB 3 * 4 * Copyright (c) 2015 - 2023 Intel Corporation 5 * 6 * This software is available to you under a choice of one of two 7 * licenses. You may choose to be licensed under the terms of the GNU 8 * General Public License (GPL) Version 2, available from the file 9 * COPYING in the main directory of this source tree, or the 10 * OpenFabrics.org BSD license below: 11 * 12 * Redistribution and use in source and binary forms, with or 13 * without modification, are permitted provided that the following 14 * conditions are met: 15 * 16 * - Redistributions of source code must retain the above 17 * copyright notice, this list of conditions and the following 18 * disclaimer. 19 * 20 * - Redistributions in binary form must reproduce the above 21 * copyright notice, this list of conditions and the following 22 * disclaimer in the documentation and/or other materials 23 * provided with the distribution. 24 * 25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 32 * SOFTWARE. 33 */ 34 35 #include "irdma_main.h" 36 37 static void irdma_cm_post_event(struct irdma_cm_event *event); 38 static void irdma_disconnect_worker(struct work_struct *work); 39 40 /** 41 * irdma_free_sqbuf - put back puda buffer if refcount is 0 42 * @vsi: The VSI structure of the device 43 * @bufp: puda buffer to free 44 */ 45 void 46 irdma_free_sqbuf(struct irdma_sc_vsi *vsi, void *bufp) 47 { 48 struct irdma_puda_buf *buf = bufp; 49 struct irdma_puda_rsrc *ilq = vsi->ilq; 50 51 if (atomic_dec_and_test(&buf->refcount)) 52 irdma_puda_ret_bufpool(ilq, buf); 53 } 54 55 /** 56 * irdma_record_ird_ord - Record IRD/ORD passed in 57 * @cm_node: connection's node 58 * @conn_ird: connection IRD 59 * @conn_ord: connection ORD 60 */ 61 static void 62 irdma_record_ird_ord(struct irdma_cm_node *cm_node, u32 conn_ird, 63 u32 conn_ord) 64 { 65 if (conn_ird > cm_node->dev->hw_attrs.max_hw_ird) 66 conn_ird = cm_node->dev->hw_attrs.max_hw_ird; 67 68 if (conn_ord > cm_node->dev->hw_attrs.max_hw_ord) 69 conn_ord = cm_node->dev->hw_attrs.max_hw_ord; 70 else if (!conn_ord && cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO) 71 conn_ord = 1; 72 cm_node->ird_size = conn_ird; 73 cm_node->ord_size = conn_ord; 74 } 75 76 /** 77 * irdma_copy_ip_ntohl - copy IP address from network to host 78 * @dst: IP address in host order 79 * @src: IP address in network order (big endian) 80 */ 81 void 82 irdma_copy_ip_ntohl(u32 *dst, __be32 *src) 83 { 84 *dst++ = ntohl(*src++); 85 *dst++ = ntohl(*src++); 86 *dst++ = ntohl(*src++); 87 *dst = ntohl(*src); 88 } 89 90 /** 91 * irdma_copy_ip_htonl - copy IP address from host to network order 92 * @dst: IP address in network order (big endian) 93 * @src: IP address in host order 94 */ 95 void 96 irdma_copy_ip_htonl(__be32 *dst, u32 *src) 97 { 98 *dst++ = htonl(*src++); 99 *dst++ = htonl(*src++); 100 *dst++ = htonl(*src++); 101 *dst = htonl(*src); 102 } 103 104 /** 105 * irdma_get_addr_info 106 * @cm_node: contains ip/tcp info 107 * @cm_info: to get a copy of the cm_node ip/tcp info 108 */ 109 static void 110 irdma_get_addr_info(struct irdma_cm_node *cm_node, 111 struct irdma_cm_info *cm_info) 112 { 113 memset(cm_info, 0, sizeof(*cm_info)); 114 cm_info->ipv4 = cm_node->ipv4; 115 cm_info->vlan_id = cm_node->vlan_id; 116 memcpy(cm_info->loc_addr, cm_node->loc_addr, sizeof(cm_info->loc_addr)); 117 memcpy(cm_info->rem_addr, cm_node->rem_addr, sizeof(cm_info->rem_addr)); 118 cm_info->loc_port = cm_node->loc_port; 119 cm_info->rem_port = cm_node->rem_port; 120 } 121 122 /** 123 * irdma_fill_sockaddr4 - fill in addr info for IPv4 connection 124 * @cm_node: connection's node 125 * @event: upper layer's cm event 126 */ 127 static inline void 128 irdma_fill_sockaddr4(struct irdma_cm_node *cm_node, 129 struct iw_cm_event *event) 130 { 131 struct sockaddr_in *laddr = (struct sockaddr_in *)&event->local_addr; 132 struct sockaddr_in *raddr = (struct sockaddr_in *)&event->remote_addr; 133 134 laddr->sin_family = AF_INET; 135 raddr->sin_family = AF_INET; 136 137 laddr->sin_port = htons(cm_node->loc_port); 138 raddr->sin_port = htons(cm_node->rem_port); 139 140 laddr->sin_addr.s_addr = htonl(cm_node->loc_addr[0]); 141 raddr->sin_addr.s_addr = htonl(cm_node->rem_addr[0]); 142 } 143 144 /** 145 * irdma_fill_sockaddr6 - fill in addr info for IPv6 connection 146 * @cm_node: connection's node 147 * @event: upper layer's cm event 148 */ 149 static inline void 150 irdma_fill_sockaddr6(struct irdma_cm_node *cm_node, 151 struct iw_cm_event *event) 152 { 153 struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)&event->local_addr; 154 struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)&event->remote_addr; 155 156 laddr6->sin6_family = AF_INET6; 157 raddr6->sin6_family = AF_INET6; 158 159 laddr6->sin6_port = htons(cm_node->loc_port); 160 raddr6->sin6_port = htons(cm_node->rem_port); 161 162 irdma_copy_ip_htonl(laddr6->sin6_addr.__u6_addr.__u6_addr32, 163 cm_node->loc_addr); 164 irdma_copy_ip_htonl(raddr6->sin6_addr.__u6_addr.__u6_addr32, 165 cm_node->rem_addr); 166 } 167 168 /** 169 * irdma_get_cmevent_info - for cm event upcall 170 * @cm_node: connection's node 171 * @cm_id: upper layers cm struct for the event 172 * @event: upper layer's cm event 173 */ 174 static inline void 175 irdma_get_cmevent_info(struct irdma_cm_node *cm_node, 176 struct iw_cm_id *cm_id, 177 struct iw_cm_event *event) 178 { 179 memcpy(&event->local_addr, &cm_id->m_local_addr, 180 sizeof(event->local_addr)); 181 memcpy(&event->remote_addr, &cm_id->m_remote_addr, 182 sizeof(event->remote_addr)); 183 if (cm_node) { 184 event->private_data = cm_node->pdata_buf; 185 event->private_data_len = (u8)cm_node->pdata.size; 186 event->ird = cm_node->ird_size; 187 event->ord = cm_node->ord_size; 188 } 189 } 190 191 /** 192 * irdma_send_cm_event - upcall cm's event handler 193 * @cm_node: connection's node 194 * @cm_id: upper layer's cm info struct 195 * @type: Event type to indicate 196 * @status: status for the event type 197 */ 198 static int 199 irdma_send_cm_event(struct irdma_cm_node *cm_node, 200 struct iw_cm_id *cm_id, 201 enum iw_cm_event_type type, int status) 202 { 203 struct iw_cm_event event = {0}; 204 205 event.event = type; 206 event.status = status; 207 208 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 209 "cm_node %p cm_id=%p state=%d accel=%d event_type=%d status=%d\n", 210 cm_node, cm_id, cm_node->accelerated, cm_node->state, type, 211 status); 212 213 switch (type) { 214 case IW_CM_EVENT_CONNECT_REQUEST: 215 if (cm_node->ipv4) 216 irdma_fill_sockaddr4(cm_node, &event); 217 else 218 irdma_fill_sockaddr6(cm_node, &event); 219 event.provider_data = cm_node; 220 event.private_data = cm_node->pdata_buf; 221 event.private_data_len = (u8)cm_node->pdata.size; 222 event.ird = cm_node->ird_size; 223 break; 224 case IW_CM_EVENT_CONNECT_REPLY: 225 irdma_get_cmevent_info(cm_node, cm_id, &event); 226 break; 227 case IW_CM_EVENT_ESTABLISHED: 228 event.ird = cm_node->ird_size; 229 event.ord = cm_node->ord_size; 230 break; 231 case IW_CM_EVENT_DISCONNECT: 232 case IW_CM_EVENT_CLOSE: 233 /* Wait if we are in RTS but havent issued the iwcm event upcall */ 234 if (!cm_node->accelerated) 235 wait_for_completion(&cm_node->establish_comp); 236 break; 237 default: 238 return -EINVAL; 239 } 240 241 return cm_id->event_handler(cm_id, &event); 242 } 243 244 /** 245 * irdma_timer_list_prep - add connection nodes to a list to perform timer tasks 246 * @cm_core: cm's core 247 * @timer_list: a timer list to which cm_node will be selected 248 */ 249 static void 250 irdma_timer_list_prep(struct irdma_cm_core *cm_core, 251 struct list_head *timer_list) 252 { 253 struct irdma_cm_node *cm_node; 254 int bkt; 255 256 HASH_FOR_EACH_RCU(cm_core->cm_hash_tbl, bkt, cm_node, list) { 257 if ((cm_node->close_entry || cm_node->send_entry) && 258 atomic_inc_not_zero(&cm_node->refcnt)) 259 list_add(&cm_node->timer_entry, timer_list); 260 } 261 } 262 263 /** 264 * irdma_create_event - create cm event 265 * @cm_node: connection's node 266 * @type: Event type to generate 267 */ 268 static struct irdma_cm_event * 269 irdma_create_event(struct irdma_cm_node *cm_node, 270 enum irdma_cm_event_type type) 271 { 272 struct irdma_cm_event *event; 273 274 if (!cm_node->cm_id) 275 return NULL; 276 277 event = kzalloc(sizeof(*event), GFP_ATOMIC); 278 279 if (!event) 280 return NULL; 281 282 event->type = type; 283 event->cm_node = cm_node; 284 memcpy(event->cm_info.rem_addr, cm_node->rem_addr, 285 sizeof(event->cm_info.rem_addr)); 286 memcpy(event->cm_info.loc_addr, cm_node->loc_addr, 287 sizeof(event->cm_info.loc_addr)); 288 event->cm_info.rem_port = cm_node->rem_port; 289 event->cm_info.loc_port = cm_node->loc_port; 290 event->cm_info.cm_id = cm_node->cm_id; 291 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 292 "node=%p event=%p type=%u dst=%x src=%x\n", cm_node, event, 293 type, event->cm_info.loc_addr[0], 294 event->cm_info.rem_addr[0]); 295 irdma_cm_post_event(event); 296 297 return event; 298 } 299 300 /** 301 * irdma_free_retrans_entry - free send entry 302 * @cm_node: connection's node 303 */ 304 static void 305 irdma_free_retrans_entry(struct irdma_cm_node *cm_node) 306 { 307 struct irdma_device *iwdev = cm_node->iwdev; 308 struct irdma_timer_entry *send_entry; 309 310 send_entry = cm_node->send_entry; 311 if (!send_entry) 312 return; 313 314 cm_node->send_entry = NULL; 315 irdma_free_sqbuf(&iwdev->vsi, send_entry->sqbuf); 316 kfree(send_entry); 317 atomic_dec(&cm_node->refcnt); 318 } 319 320 /** 321 * irdma_cleanup_retrans_entry - free send entry with lock 322 * @cm_node: connection's node 323 */ 324 static void 325 irdma_cleanup_retrans_entry(struct irdma_cm_node *cm_node) 326 { 327 unsigned long flags; 328 329 spin_lock_irqsave(&cm_node->retrans_list_lock, flags); 330 irdma_free_retrans_entry(cm_node); 331 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); 332 } 333 334 /** 335 * irdma_form_ah_cm_frame - get a free packet and build frame with address handle 336 * @cm_node: connection's node ionfo to use in frame 337 * @options: pointer to options info 338 * @hdr: pointer mpa header 339 * @pdata: pointer to private data 340 * @flags: indicates FIN or ACK 341 */ 342 static struct irdma_puda_buf * 343 irdma_form_ah_cm_frame(struct irdma_cm_node *cm_node, 344 struct irdma_kmem_info *options, 345 struct irdma_kmem_info *hdr, 346 struct irdma_mpa_priv_info *pdata, 347 u8 flags) 348 { 349 struct irdma_puda_buf *sqbuf; 350 struct irdma_sc_vsi *vsi = &cm_node->iwdev->vsi; 351 u8 *buf; 352 struct tcphdr *tcph; 353 u16 pktsize; 354 u32 opts_len = 0; 355 u32 pd_len = 0; 356 u32 hdr_len = 0; 357 358 if (!cm_node->ah || !cm_node->ah->ah_info.ah_valid) { 359 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, "AH invalid\n"); 360 return NULL; 361 } 362 363 sqbuf = irdma_puda_get_bufpool(vsi->ilq); 364 if (!sqbuf) { 365 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, "SQ buf NULL\n"); 366 return NULL; 367 } 368 369 sqbuf->ah_id = cm_node->ah->ah_info.ah_idx; 370 buf = sqbuf->mem.va; 371 if (options) 372 opts_len = (u32)options->size; 373 374 if (hdr) 375 hdr_len = hdr->size; 376 377 if (pdata) 378 pd_len = pdata->size; 379 380 pktsize = sizeof(*tcph) + opts_len + hdr_len + pd_len; 381 382 memset(buf, 0, pktsize); 383 384 sqbuf->totallen = pktsize; 385 sqbuf->tcphlen = sizeof(*tcph) + opts_len; 386 sqbuf->scratch = cm_node; 387 388 tcph = (struct tcphdr *)buf; 389 buf += sizeof(*tcph); 390 391 tcph->th_sport = htons(cm_node->loc_port); 392 tcph->th_dport = htons(cm_node->rem_port); 393 tcph->th_seq = htonl(cm_node->tcp_cntxt.loc_seq_num); 394 395 if (flags & SET_ACK) { 396 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt; 397 tcph->th_ack = htonl(cm_node->tcp_cntxt.loc_ack_num); 398 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 = from_timer(cm_core, t, tcp_timer); 1320 struct irdma_sc_vsi *vsi; 1321 u32 settimer = 0; 1322 unsigned long timetosend; 1323 unsigned long flags; 1324 struct list_head timer_list; 1325 1326 INIT_LIST_HEAD(&timer_list); 1327 1328 rcu_read_lock(); 1329 irdma_timer_list_prep(cm_core, &timer_list); 1330 rcu_read_unlock(); 1331 1332 list_for_each_safe(list_node, list_core_temp, &timer_list) { 1333 cm_node = container_of(list_node, struct irdma_cm_node, 1334 timer_entry); 1335 close_entry = cm_node->close_entry; 1336 1337 if (close_entry) { 1338 if (time_after(close_entry->timetosend, jiffies)) { 1339 if (nexttimeout > close_entry->timetosend || 1340 !settimer) { 1341 nexttimeout = close_entry->timetosend; 1342 settimer = 1; 1343 } 1344 } else { 1345 irdma_handle_close_entry(cm_node, 1); 1346 } 1347 } 1348 1349 spin_lock_irqsave(&cm_node->retrans_list_lock, flags); 1350 1351 send_entry = cm_node->send_entry; 1352 if (!send_entry) 1353 goto done; 1354 if (time_after(send_entry->timetosend, jiffies)) { 1355 if (cm_node->state != IRDMA_CM_STATE_OFFLOADED) { 1356 if (nexttimeout > send_entry->timetosend || 1357 !settimer) { 1358 nexttimeout = send_entry->timetosend; 1359 settimer = 1; 1360 } 1361 } else { 1362 irdma_free_retrans_entry(cm_node); 1363 } 1364 goto done; 1365 } 1366 1367 if (cm_node->state == IRDMA_CM_STATE_OFFLOADED || 1368 cm_node->state == IRDMA_CM_STATE_CLOSED) { 1369 irdma_free_retrans_entry(cm_node); 1370 goto done; 1371 } 1372 1373 if (!send_entry->retranscount || !send_entry->retrycount) { 1374 irdma_free_retrans_entry(cm_node); 1375 1376 spin_unlock_irqrestore(&cm_node->retrans_list_lock, 1377 flags); 1378 irdma_retrans_expired(cm_node); 1379 cm_node->state = IRDMA_CM_STATE_CLOSED; 1380 spin_lock_irqsave(&cm_node->retrans_list_lock, flags); 1381 goto done; 1382 } 1383 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); 1384 1385 vsi = &cm_node->iwdev->vsi; 1386 if (!cm_node->ack_rcvd) { 1387 atomic_inc(&send_entry->sqbuf->refcount); 1388 irdma_puda_send_buf(vsi->ilq, send_entry->sqbuf); 1389 cm_node->cm_core->stats_pkt_retrans++; 1390 } 1391 1392 spin_lock_irqsave(&cm_node->retrans_list_lock, flags); 1393 if (send_entry->send_retrans) { 1394 send_entry->retranscount--; 1395 timetosend = (IRDMA_RETRY_TIMEOUT << 1396 (IRDMA_DEFAULT_RETRANS - 1397 send_entry->retranscount)); 1398 1399 send_entry->timetosend = jiffies + 1400 min(timetosend, IRDMA_MAX_TIMEOUT); 1401 if (nexttimeout > send_entry->timetosend || !settimer) { 1402 nexttimeout = send_entry->timetosend; 1403 settimer = 1; 1404 } 1405 } else { 1406 int close_when_complete; 1407 1408 close_when_complete = send_entry->close_when_complete; 1409 irdma_free_retrans_entry(cm_node); 1410 if (close_when_complete) 1411 irdma_rem_ref_cm_node(cm_node); 1412 } 1413 done: 1414 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); 1415 irdma_rem_ref_cm_node(cm_node); 1416 } 1417 1418 if (settimer) { 1419 spin_lock_irqsave(&cm_core->ht_lock, flags); 1420 if (!timer_pending(&cm_core->tcp_timer)) { 1421 cm_core->tcp_timer.expires = nexttimeout; 1422 add_timer(&cm_core->tcp_timer); 1423 } 1424 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 1425 } 1426 } 1427 1428 /** 1429 * irdma_send_syn - send SYN packet 1430 * @cm_node: connection's node 1431 * @sendack: flag to set ACK bit or not 1432 */ 1433 int 1434 irdma_send_syn(struct irdma_cm_node *cm_node, u32 sendack) 1435 { 1436 struct irdma_puda_buf *sqbuf; 1437 int flags = SET_SYN; 1438 char optionsbuf[sizeof(struct option_mss) + 1439 sizeof(struct option_windowscale) + 1440 sizeof(struct option_base) + TCP_OPTIONS_PADDING]; 1441 struct irdma_kmem_info opts; 1442 int optionssize = 0; 1443 1444 /* Sending MSS option */ 1445 union all_known_options *options; 1446 1447 opts.addr = optionsbuf; 1448 if (!cm_node) 1449 return -EINVAL; 1450 1451 options = (union all_known_options *)&optionsbuf[optionssize]; 1452 options->mss.optionnum = OPTION_NUM_MSS; 1453 options->mss.len = sizeof(struct option_mss); 1454 options->mss.mss = htons(cm_node->tcp_cntxt.mss); 1455 optionssize += sizeof(struct option_mss); 1456 1457 options = (union all_known_options *)&optionsbuf[optionssize]; 1458 options->windowscale.optionnum = OPTION_NUM_WINDOW_SCALE; 1459 options->windowscale.len = sizeof(struct option_windowscale); 1460 options->windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale; 1461 optionssize += sizeof(struct option_windowscale); 1462 options = (union all_known_options *)&optionsbuf[optionssize]; 1463 options->eol = OPTION_NUM_EOL; 1464 optionssize += 1; 1465 1466 if (sendack) 1467 flags |= SET_ACK; 1468 1469 opts.size = optionssize; 1470 1471 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, &opts, NULL, NULL, 1472 flags); 1473 if (!sqbuf) 1474 return -ENOMEM; 1475 1476 return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 1, 1477 0); 1478 } 1479 1480 /** 1481 * irdma_send_ack - Send ACK packet 1482 * @cm_node: connection's node 1483 */ 1484 void 1485 irdma_send_ack(struct irdma_cm_node *cm_node) 1486 { 1487 struct irdma_puda_buf *sqbuf; 1488 struct irdma_sc_vsi *vsi = &cm_node->iwdev->vsi; 1489 1490 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, NULL, NULL, 1491 SET_ACK); 1492 if (sqbuf) 1493 irdma_puda_send_buf(vsi->ilq, sqbuf); 1494 } 1495 1496 /** 1497 * irdma_send_fin - Send FIN pkt 1498 * @cm_node: connection's node 1499 */ 1500 static int 1501 irdma_send_fin(struct irdma_cm_node *cm_node) 1502 { 1503 struct irdma_puda_buf *sqbuf; 1504 1505 sqbuf = cm_node->cm_core->form_cm_frame(cm_node, NULL, NULL, NULL, 1506 SET_ACK | SET_FIN); 1507 if (!sqbuf) 1508 return -ENOMEM; 1509 1510 return irdma_schedule_cm_timer(cm_node, sqbuf, IRDMA_TIMER_TYPE_SEND, 1, 1511 0); 1512 } 1513 1514 /** 1515 * irdma_find_listener - find a cm node listening on this addr-port pair 1516 * @cm_core: cm's core 1517 * @dst_addr: listener ip addr 1518 * @ipv4: flag indicating IPv4 when true 1519 * @dst_port: listener tcp port num 1520 * @vlan_id: virtual LAN ID 1521 * @listener_state: state to match with listen node's 1522 */ 1523 static struct irdma_cm_listener * 1524 irdma_find_listener(struct irdma_cm_core *cm_core, u32 *dst_addr, bool ipv4, u16 dst_port, 1525 u16 vlan_id, enum irdma_cm_listener_state listener_state) 1526 { 1527 struct irdma_cm_listener *listen_node; 1528 static const u32 ip_zero[4] = {0, 0, 0, 0}; 1529 u32 listen_addr[4]; 1530 u16 listen_port; 1531 unsigned long flags; 1532 1533 /* walk list and find cm_node associated with this session ID */ 1534 spin_lock_irqsave(&cm_core->listen_list_lock, flags); 1535 list_for_each_entry(listen_node, &cm_core->listen_list, list) { 1536 memcpy(listen_addr, listen_node->loc_addr, sizeof(listen_addr)); 1537 listen_port = listen_node->loc_port; 1538 if (listen_node->ipv4 != ipv4 || listen_port != dst_port || 1539 !(listener_state & listen_node->listener_state)) 1540 continue; 1541 /* compare node pair, return node handle if a match */ 1542 if (!memcmp(listen_addr, ip_zero, sizeof(listen_addr)) || 1543 (!memcmp(listen_addr, dst_addr, sizeof(listen_addr)) && 1544 vlan_id == listen_node->vlan_id)) { 1545 atomic_inc(&listen_node->refcnt); 1546 spin_unlock_irqrestore(&cm_core->listen_list_lock, 1547 flags); 1548 return listen_node; 1549 } 1550 } 1551 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); 1552 1553 return NULL; 1554 } 1555 1556 /** 1557 * irdma_del_multiple_qhash - Remove qhash and child listens 1558 * @iwdev: iWarp device 1559 * @cm_info: CM info for parent listen node 1560 * @cm_parent_listen_node: The parent listen node 1561 */ 1562 static int 1563 irdma_del_multiple_qhash(struct irdma_device *iwdev, 1564 struct irdma_cm_info *cm_info, 1565 struct irdma_cm_listener *cm_parent_listen_node) 1566 { 1567 struct irdma_cm_listener *child_listen_node; 1568 struct list_head *pos, *tpos; 1569 unsigned long flags; 1570 int ret = -EINVAL; 1571 1572 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags); 1573 list_for_each_safe(pos, tpos, 1574 &cm_parent_listen_node->child_listen_list) { 1575 child_listen_node = list_entry(pos, struct irdma_cm_listener, 1576 child_listen_list); 1577 if (child_listen_node->ipv4) 1578 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 1579 "removing child listen for IP=%x, port=%d, vlan=%d\n", 1580 child_listen_node->loc_addr[0], 1581 child_listen_node->loc_port, 1582 child_listen_node->vlan_id); 1583 else 1584 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 1585 "removing child listen for IP=%x:%x:%x:%x, port=%d, vlan=%d\n", 1586 IRDMA_PRINT_IP6(child_listen_node->loc_addr), 1587 child_listen_node->loc_port, 1588 child_listen_node->vlan_id); 1589 list_del(pos); 1590 memcpy(cm_info->loc_addr, child_listen_node->loc_addr, 1591 sizeof(cm_info->loc_addr)); 1592 cm_info->vlan_id = child_listen_node->vlan_id; 1593 if (child_listen_node->qhash_set) { 1594 ret = irdma_manage_qhash(iwdev, cm_info, 1595 IRDMA_QHASH_TYPE_TCP_SYN, 1596 IRDMA_QHASH_MANAGE_TYPE_DELETE, 1597 NULL, false); 1598 child_listen_node->qhash_set = false; 1599 } else { 1600 ret = 0; 1601 } 1602 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 1603 "Child listen node freed = %p\n", 1604 child_listen_node); 1605 kfree(child_listen_node); 1606 cm_parent_listen_node->cm_core->stats_listen_nodes_destroyed++; 1607 } 1608 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); 1609 1610 return ret; 1611 } 1612 1613 static u8 irdma_iw_get_vlan_prio(u32 *loc_addr, u8 prio, bool ipv4) 1614 { 1615 return prio; 1616 } 1617 1618 /** 1619 * irdma_get_vlan_mac_ipv6 - Get the vlan and mac for an IPv6 1620 * address 1621 * @addr: local IPv6 address 1622 * @vlan_id: vlan id for the given IPv6 address 1623 * @mac: mac address for the given IPv6 address 1624 * 1625 * Returns the net_device of the IPv6 address and also sets the 1626 * vlan id and mac for that address. 1627 */ 1628 void 1629 irdma_get_vlan_mac_ipv6(struct iw_cm_id *cm_id, u32 *addr, u16 *vlan_id, u8 *mac) 1630 { 1631 if_t ip_dev = NULL; 1632 struct in6_addr laddr6; 1633 struct vnet *vnet = &init_net; 1634 struct ifaddr *ifa; 1635 u16 scope_id = 0; 1636 1637 irdma_copy_ip_htonl(laddr6.__u6_addr.__u6_addr32, addr); 1638 if (vlan_id) 1639 *vlan_id = 0xFFFF; /* Match rdma_vlan_dev_vlan_id() */ 1640 if (mac) 1641 eth_zero_addr(mac); 1642 1643 if (IN6_IS_SCOPE_LINKLOCAL(&laddr6) || 1644 IN6_IS_ADDR_MC_INTFACELOCAL(&laddr6)) 1645 scope_id = ntohs(laddr6.__u6_addr.__u6_addr16[1]); 1646 1647 #ifdef VIMAGE 1648 vnet = irdma_cmid_to_vnet(cm_id); 1649 #endif 1650 ip_dev = ip6_ifp_find(vnet, laddr6, scope_id); 1651 if (ip_dev) { 1652 if (vlan_id) 1653 *vlan_id = rdma_vlan_dev_vlan_id(ip_dev); 1654 ifa = if_getifaddr(ip_dev); 1655 if (ifa && ifa->ifa_addr && mac) 1656 ether_addr_copy(mac, if_getlladdr(ip_dev)); 1657 } 1658 } 1659 1660 /** 1661 * irdma_get_vlan_ipv4 - Returns the vlan_id for IPv4 address 1662 * @addr: local IPv4 address 1663 */ 1664 u16 1665 irdma_get_vlan_ipv4(struct iw_cm_id *cm_id, u32 *addr) 1666 { 1667 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 static int 1687 irdma_manage_qhash_wait(struct irdma_pci_f *rf, struct irdma_cm_info *cm_info) 1688 { 1689 struct irdma_cqp_request *cqp_request = cm_info->cqp_request; 1690 int cnt = rf->sc_dev.hw_attrs.max_cqp_compl_wait_time_ms * CQP_TIMEOUT_THRESHOLD; 1691 u32 ret_val; 1692 1693 if (!cqp_request) 1694 return -ENOMEM; 1695 do { 1696 irdma_cqp_ce_handler(rf, &rf->ccq.sc_cq); 1697 mdelay(1); 1698 } while (!READ_ONCE(cqp_request->request_done) && --cnt); 1699 1700 ret_val = cqp_request->compl_info.op_ret_val; 1701 irdma_put_cqp_request(&rf->cqp, cqp_request); 1702 if (cnt) { 1703 if (!ret_val) 1704 return 0; 1705 return -EINVAL; 1706 } 1707 1708 return -ETIMEDOUT; 1709 } 1710 1711 /** 1712 * irdma_add_mqh_ifa_cb - Adds multiple qhashes for IPv4/IPv6 1713 * @arg: Calback argument structure from irdma_add_mqh 1714 * @ifa: Current address to compute against 1715 * @count: Current cumulative output of all callbacks in this iteration 1716 * 1717 * Adds a qhash and a child listen node for a single IPv4/IPv6 address 1718 * on the adapter and adds the associated qhash filter 1719 */ 1720 static u_int 1721 irdma_add_mqh_ifa_cb(void *arg, struct ifaddr *ifa, u_int count) 1722 { 1723 struct irdma_add_mqh_cbs *cbs = arg; 1724 struct irdma_cm_listener *child_listen_node; 1725 struct irdma_cm_info *cm_info = cbs->cm_info; 1726 struct irdma_device *iwdev = cbs->iwdev; 1727 struct irdma_cm_listener *cm_parent_listen_node = cbs->cm_listen_node; 1728 if_t ip_dev = ifa->ifa_ifp; 1729 unsigned long flags; 1730 int ret; 1731 1732 if (count) 1733 return 0; 1734 1735 child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_ATOMIC); 1736 if (!child_listen_node) { 1737 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 1738 "listener memory allocation\n"); 1739 return -ENOMEM; 1740 } 1741 1742 memcpy(child_listen_node, cm_parent_listen_node, 1743 sizeof(*child_listen_node)); 1744 cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev); 1745 child_listen_node->vlan_id = cm_info->vlan_id; 1746 if (cm_info->ipv4) { 1747 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 1748 "Allocating child CM Listener forIP=%x, vlan_id=%d, MAC=%x:%x:%x:%x:%x:%x\n", 1749 ((struct sockaddr_in *)&ifa->ifa_addr)->sin_addr.s_addr, 1750 rdma_vlan_dev_vlan_id(ip_dev), 1751 if_getlladdr(ip_dev)[0], if_getlladdr(ip_dev)[1], 1752 if_getlladdr(ip_dev)[2], if_getlladdr(ip_dev)[3], 1753 if_getlladdr(ip_dev)[4], if_getlladdr(ip_dev)[5]); 1754 child_listen_node->loc_addr[0] = 1755 ntohl(((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr); 1756 } else { 1757 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 1758 "IP=%x:%x:%x:%x, vlan_id=%d, MAC=%x:%x:%x:%x:%x:%x\n", 1759 IRDMA_PRINT_IP6(&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr), 1760 rdma_vlan_dev_vlan_id(ip_dev), 1761 if_getlladdr(ip_dev)[0], if_getlladdr(ip_dev)[1], 1762 if_getlladdr(ip_dev)[2], if_getlladdr(ip_dev)[3], 1763 if_getlladdr(ip_dev)[4], if_getlladdr(ip_dev)[5]); 1764 irdma_copy_ip_ntohl(child_listen_node->loc_addr, 1765 ((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr.__u6_addr.__u6_addr32); 1766 } 1767 memcpy(cm_info->loc_addr, child_listen_node->loc_addr, 1768 sizeof(cm_info->loc_addr)); 1769 if (!iwdev->vsi.dscp_mode) 1770 cm_info->user_pri = 1771 irdma_iw_get_vlan_prio(child_listen_node->loc_addr, 1772 cm_info->user_pri, 1773 cm_info->ipv4); 1774 ret = irdma_manage_qhash(iwdev, cm_info, 1775 IRDMA_QHASH_TYPE_TCP_SYN, 1776 IRDMA_QHASH_MANAGE_TYPE_ADD, 1777 NULL, false); 1778 if (ret) { 1779 kfree(child_listen_node); 1780 return ret; 1781 } 1782 /* wait for qhash finish */ 1783 ret = irdma_manage_qhash_wait(iwdev->rf, cm_info); 1784 if (ret) { 1785 kfree(child_listen_node); 1786 return ret; 1787 } 1788 1789 child_listen_node->qhash_set = true; 1790 spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags); 1791 list_add(&child_listen_node->child_listen_list, 1792 &cm_parent_listen_node->child_listen_list); 1793 spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); 1794 cm_parent_listen_node->cm_core->stats_listen_nodes_created++; 1795 1796 return 0; 1797 } 1798 1799 /** 1800 * irdma_add_mqh - Adds multiple qhashes 1801 * @iwdev: iWarp device 1802 * @cm_info: CM info for parent listen node 1803 * @cm_listen_node: The parent listen node 1804 */ 1805 static int 1806 irdma_add_mqh(struct irdma_device *iwdev, 1807 struct irdma_cm_info *cm_info, 1808 struct irdma_cm_listener *cm_listen_node) 1809 { 1810 struct epoch_tracker et; 1811 struct irdma_add_mqh_cbs cbs; 1812 struct if_iter iter; 1813 if_t ifp; 1814 int err = -ENOENT; 1815 1816 cbs.iwdev = iwdev; 1817 cbs.cm_info = cm_info; 1818 cbs.cm_listen_node = cm_listen_node; 1819 1820 VNET_ITERATOR_DECL(vnet_iter); 1821 1822 VNET_LIST_RLOCK(); 1823 NET_EPOCH_ENTER(et); 1824 VNET_FOREACH(vnet_iter) { 1825 CURVNET_SET_QUIET(vnet_iter); 1826 for (ifp = if_iter_start(&iter); ifp != NULL; ifp = if_iter_next(&iter)) { 1827 if (!(if_getflags(ifp) & IFF_UP)) 1828 continue; 1829 1830 if (((rdma_vlan_dev_vlan_id(ifp) >= VLAN_N_VID) || 1831 (rdma_vlan_dev_real_dev(ifp) != iwdev->netdev)) && 1832 ifp != iwdev->netdev) 1833 continue; 1834 1835 if_addr_rlock(ifp); 1836 if (cm_info->ipv4) 1837 err = if_foreach_addr_type(ifp, AF_INET, irdma_add_mqh_ifa_cb, &cbs); 1838 else 1839 err = if_foreach_addr_type(ifp, AF_INET6, irdma_add_mqh_ifa_cb, &cbs); 1840 if_addr_runlock(ifp); 1841 } 1842 if_iter_finish(&iter); 1843 CURVNET_RESTORE(); 1844 } 1845 NET_EPOCH_EXIT(et); 1846 VNET_LIST_RUNLOCK(); 1847 1848 return err; 1849 } 1850 1851 /** 1852 * irdma_reset_list_prep - add connection nodes slated for reset to list 1853 * @cm_core: cm's core 1854 * @listener: pointer to listener node 1855 * @reset_list: a list to which cm_node will be selected 1856 */ 1857 static void 1858 irdma_reset_list_prep(struct irdma_cm_core *cm_core, 1859 struct irdma_cm_listener *listener, 1860 struct list_head *reset_list) 1861 { 1862 struct irdma_cm_node *cm_node; 1863 int bkt; 1864 1865 HASH_FOR_EACH_RCU(cm_core->cm_hash_tbl, bkt, cm_node, list) { 1866 if (cm_node->listener == listener && 1867 !cm_node->accelerated && 1868 atomic_inc_not_zero(&cm_node->refcnt)) 1869 list_add(&cm_node->reset_entry, reset_list); 1870 } 1871 } 1872 1873 /** 1874 * irdma_dec_refcnt_listen - delete listener and associated cm nodes 1875 * @cm_core: cm's core 1876 * @listener: pointer to listener node 1877 * @free_hanging_nodes: to free associated cm_nodes 1878 * @apbvt_del: flag to delete the apbvt 1879 */ 1880 static int 1881 irdma_dec_refcnt_listen(struct irdma_cm_core *cm_core, 1882 struct irdma_cm_listener *listener, 1883 int free_hanging_nodes, bool apbvt_del) 1884 { 1885 struct list_head *list_pos; 1886 struct list_head *list_temp; 1887 struct irdma_cm_node *cm_node; 1888 struct list_head reset_list; 1889 struct irdma_cm_info nfo; 1890 enum irdma_cm_node_state old_state; 1891 unsigned long flags; 1892 int err; 1893 1894 /* free non-accelerated child nodes for this listener */ 1895 INIT_LIST_HEAD(&reset_list); 1896 if (free_hanging_nodes) { 1897 rcu_read_lock(); 1898 irdma_reset_list_prep(cm_core, listener, &reset_list); 1899 rcu_read_unlock(); 1900 } 1901 1902 list_for_each_safe(list_pos, list_temp, &reset_list) { 1903 cm_node = container_of(list_pos, struct irdma_cm_node, 1904 reset_entry); 1905 if (cm_node->state >= IRDMA_CM_STATE_FIN_WAIT1) { 1906 irdma_rem_ref_cm_node(cm_node); 1907 continue; 1908 } 1909 1910 irdma_cleanup_retrans_entry(cm_node); 1911 err = irdma_send_reset(cm_node); 1912 if (err) { 1913 cm_node->state = IRDMA_CM_STATE_CLOSED; 1914 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 1915 "send reset failed\n"); 1916 } else { 1917 old_state = cm_node->state; 1918 cm_node->state = IRDMA_CM_STATE_LISTENER_DESTROYED; 1919 if (old_state != IRDMA_CM_STATE_MPAREQ_RCVD) 1920 irdma_rem_ref_cm_node(cm_node); 1921 } 1922 } 1923 1924 if (atomic_dec_and_test(&listener->refcnt)) { 1925 spin_lock_irqsave(&cm_core->listen_list_lock, flags); 1926 list_del(&listener->list); 1927 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); 1928 1929 if (apbvt_del) 1930 irdma_del_apbvt(listener->iwdev, 1931 listener->apbvt_entry); 1932 memcpy(nfo.loc_addr, listener->loc_addr, sizeof(nfo.loc_addr)); 1933 nfo.loc_port = listener->loc_port; 1934 nfo.ipv4 = listener->ipv4; 1935 nfo.vlan_id = listener->vlan_id; 1936 nfo.user_pri = listener->user_pri; 1937 nfo.qh_qpid = listener->iwdev->vsi.ilq->qp_id; 1938 1939 if (!list_empty(&listener->child_listen_list)) { 1940 irdma_del_multiple_qhash(listener->iwdev, &nfo, 1941 listener); 1942 } else { 1943 if (listener->qhash_set) 1944 irdma_manage_qhash(listener->iwdev, 1945 &nfo, 1946 IRDMA_QHASH_TYPE_TCP_SYN, 1947 IRDMA_QHASH_MANAGE_TYPE_DELETE, 1948 NULL, false); 1949 } 1950 1951 cm_core->stats_listen_destroyed++; 1952 cm_core->stats_listen_nodes_destroyed++; 1953 irdma_debug(&listener->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 1954 "loc_port=0x%04x loc_addr=%x cm_listen_node=%p cm_id=%p qhash_set=%d vlan_id=%d apbvt_del=%d\n", 1955 listener->loc_port, listener->loc_addr[0], listener, 1956 listener->cm_id, listener->qhash_set, 1957 listener->vlan_id, apbvt_del); 1958 kfree(listener); 1959 listener = NULL; 1960 return 0; 1961 } 1962 1963 return -EINVAL; 1964 } 1965 1966 /** 1967 * irdma_cm_del_listen - delete a listener 1968 * @cm_core: cm's core 1969 * @listener: passive connection's listener 1970 * @apbvt_del: flag to delete apbvt 1971 */ 1972 static int 1973 irdma_cm_del_listen(struct irdma_cm_core *cm_core, 1974 struct irdma_cm_listener *listener, 1975 bool apbvt_del) 1976 { 1977 listener->listener_state = IRDMA_CM_LISTENER_PASSIVE_STATE; 1978 listener->cm_id = NULL; 1979 1980 return irdma_dec_refcnt_listen(cm_core, listener, 1, apbvt_del); 1981 } 1982 1983 /** 1984 * irdma_find_node - find a cm node that matches the reference cm node 1985 * @cm_core: cm's core 1986 * @rem_port: remote tcp port num 1987 * @rem_addr: remote ip addr 1988 * @loc_port: local tcp port num 1989 * @loc_addr: local ip addr 1990 * @vlan_id: local VLAN ID 1991 */ 1992 struct irdma_cm_node * 1993 irdma_find_node(struct irdma_cm_core *cm_core, 1994 u16 rem_port, u32 *rem_addr, u16 loc_port, 1995 u32 *loc_addr, u16 vlan_id) 1996 { 1997 struct irdma_cm_node *cm_node; 1998 u32 key = (rem_port << 16) | loc_port; 1999 2000 rcu_read_lock(); 2001 HASH_FOR_EACH_POSSIBLE_RCU(cm_core->cm_hash_tbl, cm_node, list, key) { 2002 if (cm_node->vlan_id == vlan_id && 2003 cm_node->loc_port == loc_port && cm_node->rem_port == rem_port && 2004 !memcmp(cm_node->loc_addr, loc_addr, sizeof(cm_node->loc_addr)) && 2005 !memcmp(cm_node->rem_addr, rem_addr, sizeof(cm_node->rem_addr))) { 2006 if (!atomic_inc_not_zero(&cm_node->refcnt)) 2007 goto exit; 2008 rcu_read_unlock(); 2009 return cm_node; 2010 } 2011 } 2012 2013 exit: 2014 rcu_read_unlock(); 2015 2016 /* no owner node */ 2017 return NULL; 2018 } 2019 2020 /** 2021 * irdma_add_hte_node - add a cm node to the hash table 2022 * @cm_core: cm's core 2023 * @cm_node: connection's node 2024 */ 2025 static void 2026 irdma_add_hte_node(struct irdma_cm_core *cm_core, 2027 struct irdma_cm_node *cm_node) 2028 { 2029 unsigned long flags; 2030 u32 key = (cm_node->rem_port << 16) | cm_node->loc_port; 2031 2032 spin_lock_irqsave(&cm_core->ht_lock, flags); 2033 HASH_ADD_RCU(cm_core->cm_hash_tbl, &cm_node->list, key); 2034 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 2035 } 2036 2037 /** 2038 * irdma_ipv4_is_lpb - check if loopback 2039 * @loc_addr: local addr to compare 2040 * @rem_addr: remote address 2041 */ 2042 bool 2043 irdma_ipv4_is_lpb(u32 loc_addr, u32 rem_addr) 2044 { 2045 return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr); 2046 } 2047 2048 /** 2049 * irdma_ipv6_is_lpb - check if loopback 2050 * @loc_addr: local addr to compare 2051 * @rem_addr: remote address 2052 */ 2053 bool 2054 irdma_ipv6_is_lpb(u32 *loc_addr, u32 *rem_addr) 2055 { 2056 struct in6_addr raddr6; 2057 2058 irdma_copy_ip_htonl(raddr6.__u6_addr.__u6_addr32, rem_addr); 2059 2060 return !memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6); 2061 } 2062 2063 /** 2064 * irdma_cm_create_ah - create a cm address handle 2065 * @cm_node: The connection manager node to create AH for 2066 * @wait: Provides option to wait for ah creation or not 2067 */ 2068 static int 2069 irdma_cm_create_ah(struct irdma_cm_node *cm_node, bool wait) 2070 { 2071 struct irdma_ah_info ah_info = {0}; 2072 struct irdma_device *iwdev = cm_node->iwdev; 2073 #ifdef VIMAGE 2074 struct vnet *vnet = irdma_cmid_to_vnet(cm_node->cm_id); 2075 #endif 2076 2077 ether_addr_copy(ah_info.mac_addr, if_getlladdr(iwdev->netdev)); 2078 2079 ah_info.hop_ttl = 0x40; 2080 ah_info.tc_tos = cm_node->tos; 2081 ah_info.vsi = &iwdev->vsi; 2082 2083 if (cm_node->ipv4) { 2084 ah_info.ipv4_valid = true; 2085 ah_info.dest_ip_addr[0] = cm_node->rem_addr[0]; 2086 ah_info.src_ip_addr[0] = cm_node->loc_addr[0]; 2087 CURVNET_SET_QUIET(vnet); 2088 ah_info.do_lpbk = irdma_ipv4_is_lpb(ah_info.src_ip_addr[0], 2089 ah_info.dest_ip_addr[0]); 2090 CURVNET_RESTORE(); 2091 } else { 2092 memcpy(ah_info.dest_ip_addr, cm_node->rem_addr, 2093 sizeof(ah_info.dest_ip_addr)); 2094 memcpy(ah_info.src_ip_addr, cm_node->loc_addr, 2095 sizeof(ah_info.src_ip_addr)); 2096 ah_info.do_lpbk = irdma_ipv6_is_lpb(ah_info.src_ip_addr, 2097 ah_info.dest_ip_addr); 2098 } 2099 2100 ah_info.vlan_tag = cm_node->vlan_id; 2101 if (cm_node->vlan_id < VLAN_N_VID) { 2102 ah_info.insert_vlan_tag = 1; 2103 ah_info.vlan_tag |= cm_node->user_pri << VLAN_PRIO_SHIFT; 2104 } 2105 2106 ah_info.dst_arpindex = 2107 irdma_arp_table(iwdev->rf, ah_info.dest_ip_addr, 2108 NULL, IRDMA_ARP_RESOLVE); 2109 2110 if (irdma_puda_create_ah(&iwdev->rf->sc_dev, &ah_info, wait, 2111 IRDMA_PUDA_RSRC_TYPE_ILQ, cm_node, 2112 &cm_node->ah)) 2113 return -ENOMEM; 2114 2115 return 0; 2116 } 2117 2118 /** 2119 * irdma_cm_free_ah - free a cm address handle 2120 * @cm_node: The connection manager node to create AH for 2121 */ 2122 static void 2123 irdma_cm_free_ah(struct irdma_cm_node *cm_node) 2124 { 2125 struct irdma_device *iwdev = cm_node->iwdev; 2126 2127 irdma_puda_free_ah(&iwdev->rf->sc_dev, cm_node->ah); 2128 cm_node->ah = NULL; 2129 } 2130 2131 /** 2132 * irdma_make_cm_node - create a new instance of a cm node 2133 * @cm_core: cm's core 2134 * @iwdev: iwarp device structure 2135 * @cm_info: quad info for connection 2136 * @listener: passive connection's listener 2137 */ 2138 static struct irdma_cm_node * 2139 irdma_make_cm_node(struct irdma_cm_core *cm_core, struct irdma_device *iwdev, 2140 struct irdma_cm_info *cm_info, 2141 struct irdma_cm_listener *listener) 2142 { 2143 struct irdma_cm_node *cm_node; 2144 int arpindex; 2145 if_t netdev = iwdev->netdev; 2146 2147 /* create an hte and cm_node for this instance */ 2148 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC); 2149 if (!cm_node) 2150 return NULL; 2151 2152 /* set our node specific transport info */ 2153 cm_node->ipv4 = cm_info->ipv4; 2154 cm_node->vlan_id = cm_info->vlan_id; 2155 if (cm_node->vlan_id >= VLAN_N_VID && iwdev->dcb_vlan_mode) 2156 cm_node->vlan_id = 0; 2157 cm_node->tos = cm_info->tos; 2158 cm_node->user_pri = cm_info->user_pri; 2159 if (listener) { 2160 if (listener->tos != cm_info->tos) 2161 irdma_dev_warn(&iwdev->ibdev, 2162 "application TOS[%d] and remote client TOS[%d] mismatch\n", 2163 listener->tos, cm_info->tos); 2164 if (iwdev->vsi.dscp_mode) { 2165 cm_node->user_pri = listener->user_pri; 2166 } else { 2167 cm_node->tos = max(listener->tos, cm_info->tos); 2168 cm_node->user_pri = rt_tos2priority(cm_node->tos); 2169 cm_node->user_pri = 2170 irdma_iw_get_vlan_prio(cm_info->loc_addr, 2171 cm_node->user_pri, 2172 cm_info->ipv4); 2173 } 2174 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_DCB, 2175 "listener: TOS:[%d] UP:[%d]\n", cm_node->tos, 2176 cm_node->user_pri); 2177 } 2178 memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr)); 2179 memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr)); 2180 cm_node->loc_port = cm_info->loc_port; 2181 cm_node->rem_port = cm_info->rem_port; 2182 2183 cm_node->mpa_frame_rev = IRDMA_CM_DEFAULT_MPA_VER; 2184 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO; 2185 cm_node->iwdev = iwdev; 2186 cm_node->dev = &iwdev->rf->sc_dev; 2187 2188 cm_node->ird_size = cm_node->dev->hw_attrs.max_hw_ird; 2189 cm_node->ord_size = cm_node->dev->hw_attrs.max_hw_ord; 2190 2191 cm_node->listener = listener; 2192 cm_node->cm_id = cm_info->cm_id; 2193 ether_addr_copy(cm_node->loc_mac, if_getlladdr(netdev)); 2194 spin_lock_init(&cm_node->retrans_list_lock); 2195 cm_node->ack_rcvd = false; 2196 2197 init_completion(&cm_node->establish_comp); 2198 atomic_set(&cm_node->refcnt, 1); 2199 /* associate our parent CM core */ 2200 cm_node->cm_core = cm_core; 2201 cm_node->tcp_cntxt.loc_id = IRDMA_CM_DEFAULT_LOCAL_ID; 2202 cm_node->tcp_cntxt.rcv_wscale = iwdev->rcv_wscale; 2203 cm_node->tcp_cntxt.rcv_wnd = iwdev->rcv_wnd >> cm_node->tcp_cntxt.rcv_wscale; 2204 kc_set_loc_seq_num_mss(cm_node); 2205 2206 arpindex = irdma_resolve_neigh_lpb_chk(iwdev, cm_node, cm_info); 2207 if (arpindex < 0) 2208 goto err; 2209 2210 ether_addr_copy(cm_node->rem_mac, iwdev->rf->arp_table[arpindex].mac_addr); 2211 irdma_add_hte_node(cm_core, cm_node); 2212 cm_core->stats_nodes_created++; 2213 return cm_node; 2214 2215 err: 2216 kfree(cm_node); 2217 2218 return NULL; 2219 } 2220 2221 static void 2222 irdma_destroy_connection(struct irdma_cm_node *cm_node) 2223 { 2224 struct irdma_cm_core *cm_core = cm_node->cm_core; 2225 struct irdma_qp *iwqp; 2226 struct irdma_cm_info nfo; 2227 2228 /* if the node is destroyed before connection was accelerated */ 2229 if (!cm_node->accelerated && cm_node->accept_pend) { 2230 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2231 "node destroyed before established\n"); 2232 atomic_dec(&cm_node->listener->pend_accepts_cnt); 2233 } 2234 if (cm_node->close_entry) 2235 irdma_handle_close_entry(cm_node, 0); 2236 if (cm_node->listener) { 2237 irdma_dec_refcnt_listen(cm_core, cm_node->listener, 0, true); 2238 } else { 2239 if (cm_node->apbvt_set) { 2240 irdma_del_apbvt(cm_node->iwdev, cm_node->apbvt_entry); 2241 cm_node->apbvt_set = 0; 2242 } 2243 irdma_get_addr_info(cm_node, &nfo); 2244 if (cm_node->qhash_set) { 2245 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id; 2246 irdma_manage_qhash(cm_node->iwdev, &nfo, 2247 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 2248 IRDMA_QHASH_MANAGE_TYPE_DELETE, NULL, 2249 false); 2250 cm_node->qhash_set = 0; 2251 } 2252 } 2253 2254 iwqp = cm_node->iwqp; 2255 if (iwqp) { 2256 cm_node->cm_id->rem_ref(cm_node->cm_id); 2257 cm_node->cm_id = NULL; 2258 iwqp->cm_id = NULL; 2259 irdma_qp_rem_ref(&iwqp->ibqp); 2260 cm_node->iwqp = NULL; 2261 } else if (cm_node->qhash_set) { 2262 irdma_get_addr_info(cm_node, &nfo); 2263 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id; 2264 irdma_manage_qhash(cm_node->iwdev, &nfo, 2265 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 2266 IRDMA_QHASH_MANAGE_TYPE_DELETE, NULL, false); 2267 cm_node->qhash_set = 0; 2268 } 2269 2270 cm_core->cm_free_ah(cm_node); 2271 } 2272 2273 /** 2274 * irdma_rem_ref_cm_node - destroy an instance of a cm node 2275 * @cm_node: connection's node 2276 */ 2277 void 2278 irdma_rem_ref_cm_node(struct irdma_cm_node *cm_node) 2279 { 2280 struct irdma_cm_core *cm_core = cm_node->cm_core; 2281 unsigned long flags; 2282 2283 spin_lock_irqsave(&cm_core->ht_lock, flags); 2284 2285 if (!atomic_dec_and_test(&cm_node->refcnt)) { 2286 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 2287 return; 2288 } 2289 if (cm_node->iwqp) { 2290 cm_node->iwqp->cm_node = NULL; 2291 cm_node->iwqp->cm_id = NULL; 2292 } 2293 HASH_DEL_RCU(cm_core->cm_hash_tbl, &cm_node->list); 2294 cm_node->cm_core->stats_nodes_destroyed++; 2295 2296 spin_unlock_irqrestore(&cm_core->ht_lock, flags); 2297 2298 irdma_destroy_connection(cm_node); 2299 2300 kfree_rcu(cm_node, rcu_head); 2301 } 2302 2303 /** 2304 * irdma_handle_fin_pkt - FIN packet received 2305 * @cm_node: connection's node 2306 */ 2307 static void 2308 irdma_handle_fin_pkt(struct irdma_cm_node *cm_node) 2309 { 2310 switch (cm_node->state) { 2311 case IRDMA_CM_STATE_SYN_RCVD: 2312 case IRDMA_CM_STATE_SYN_SENT: 2313 case IRDMA_CM_STATE_ESTABLISHED: 2314 case IRDMA_CM_STATE_MPAREJ_RCVD: 2315 cm_node->tcp_cntxt.rcv_nxt++; 2316 irdma_cleanup_retrans_entry(cm_node); 2317 cm_node->state = IRDMA_CM_STATE_LAST_ACK; 2318 irdma_send_fin(cm_node); 2319 break; 2320 case IRDMA_CM_STATE_MPAREQ_SENT: 2321 irdma_create_event(cm_node, IRDMA_CM_EVENT_ABORTED); 2322 cm_node->tcp_cntxt.rcv_nxt++; 2323 irdma_cleanup_retrans_entry(cm_node); 2324 cm_node->state = IRDMA_CM_STATE_CLOSED; 2325 atomic_inc(&cm_node->refcnt); 2326 irdma_send_reset(cm_node); 2327 break; 2328 case IRDMA_CM_STATE_FIN_WAIT1: 2329 cm_node->tcp_cntxt.rcv_nxt++; 2330 irdma_cleanup_retrans_entry(cm_node); 2331 cm_node->state = IRDMA_CM_STATE_CLOSING; 2332 irdma_send_ack(cm_node); 2333 /* 2334 * Wait for ACK as this is simultaneous close. After we receive ACK, do not send anything. Just rm the 2335 * node. 2336 */ 2337 break; 2338 case IRDMA_CM_STATE_FIN_WAIT2: 2339 cm_node->tcp_cntxt.rcv_nxt++; 2340 irdma_cleanup_retrans_entry(cm_node); 2341 cm_node->state = IRDMA_CM_STATE_TIME_WAIT; 2342 irdma_send_ack(cm_node); 2343 irdma_schedule_cm_timer(cm_node, NULL, IRDMA_TIMER_TYPE_CLOSE, 2344 1, 0); 2345 break; 2346 case IRDMA_CM_STATE_TIME_WAIT: 2347 cm_node->tcp_cntxt.rcv_nxt++; 2348 irdma_cleanup_retrans_entry(cm_node); 2349 cm_node->state = IRDMA_CM_STATE_CLOSED; 2350 irdma_rem_ref_cm_node(cm_node); 2351 break; 2352 case IRDMA_CM_STATE_OFFLOADED: 2353 default: 2354 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2355 "bad state node state = %d\n", cm_node->state); 2356 break; 2357 } 2358 } 2359 2360 /** 2361 * irdma_handle_rst_pkt - process received RST packet 2362 * @cm_node: connection's node 2363 * @rbuf: receive buffer 2364 */ 2365 static void 2366 irdma_handle_rst_pkt(struct irdma_cm_node *cm_node, 2367 struct irdma_puda_buf *rbuf) 2368 { 2369 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2370 "caller: %pS cm_node=%p state=%d rem_port=0x%04x loc_port=0x%04x rem_addr=%x loc_addr=%x\n", 2371 __builtin_return_address(0), cm_node, cm_node->state, 2372 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr[0], 2373 cm_node->loc_addr[0]); 2374 2375 irdma_cleanup_retrans_entry(cm_node); 2376 switch (cm_node->state) { 2377 case IRDMA_CM_STATE_SYN_SENT: 2378 case IRDMA_CM_STATE_MPAREQ_SENT: 2379 switch (cm_node->mpa_frame_rev) { 2380 case IETF_MPA_V2: 2381 /* Drop down to MPA_V1 */ 2382 cm_node->mpa_frame_rev = IETF_MPA_V1; 2383 /* send a syn and goto syn sent state */ 2384 cm_node->state = IRDMA_CM_STATE_SYN_SENT; 2385 if (irdma_send_syn(cm_node, 0)) 2386 irdma_active_open_err(cm_node, false); 2387 break; 2388 case IETF_MPA_V1: 2389 default: 2390 irdma_active_open_err(cm_node, false); 2391 break; 2392 } 2393 break; 2394 case IRDMA_CM_STATE_MPAREQ_RCVD: 2395 atomic_inc(&cm_node->passive_state); 2396 break; 2397 case IRDMA_CM_STATE_ESTABLISHED: 2398 case IRDMA_CM_STATE_SYN_RCVD: 2399 case IRDMA_CM_STATE_LISTENING: 2400 irdma_passive_open_err(cm_node, false); 2401 break; 2402 case IRDMA_CM_STATE_OFFLOADED: 2403 irdma_active_open_err(cm_node, false); 2404 break; 2405 case IRDMA_CM_STATE_CLOSED: 2406 break; 2407 case IRDMA_CM_STATE_FIN_WAIT2: 2408 case IRDMA_CM_STATE_FIN_WAIT1: 2409 case IRDMA_CM_STATE_LAST_ACK: 2410 case IRDMA_CM_STATE_TIME_WAIT: 2411 cm_node->state = IRDMA_CM_STATE_CLOSED; 2412 irdma_rem_ref_cm_node(cm_node); 2413 break; 2414 default: 2415 break; 2416 } 2417 } 2418 2419 /** 2420 * irdma_handle_rcv_mpa - Process a recv'd mpa buffer 2421 * @cm_node: connection's node 2422 * @rbuf: receive buffer 2423 */ 2424 static void 2425 irdma_handle_rcv_mpa(struct irdma_cm_node *cm_node, 2426 struct irdma_puda_buf *rbuf) 2427 { 2428 int err; 2429 int datasize = rbuf->datalen; 2430 u8 *dataloc = rbuf->data; 2431 2432 enum irdma_cm_event_type type = IRDMA_CM_EVENT_UNKNOWN; 2433 u32 res_type; 2434 2435 err = irdma_parse_mpa(cm_node, dataloc, &res_type, datasize); 2436 if (err) { 2437 if (cm_node->state == IRDMA_CM_STATE_MPAREQ_SENT) 2438 irdma_active_open_err(cm_node, true); 2439 else 2440 irdma_passive_open_err(cm_node, true); 2441 return; 2442 } 2443 2444 switch (cm_node->state) { 2445 case IRDMA_CM_STATE_ESTABLISHED: 2446 if (res_type == IRDMA_MPA_REQUEST_REJECT) 2447 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2448 "state for reject\n"); 2449 cm_node->state = IRDMA_CM_STATE_MPAREQ_RCVD; 2450 type = IRDMA_CM_EVENT_MPA_REQ; 2451 irdma_send_ack(cm_node); /* ACK received MPA request */ 2452 atomic_set(&cm_node->passive_state, 2453 IRDMA_PASSIVE_STATE_INDICATED); 2454 break; 2455 case IRDMA_CM_STATE_MPAREQ_SENT: 2456 irdma_cleanup_retrans_entry(cm_node); 2457 if (res_type == IRDMA_MPA_REQUEST_REJECT) { 2458 type = IRDMA_CM_EVENT_MPA_REJECT; 2459 cm_node->state = IRDMA_CM_STATE_MPAREJ_RCVD; 2460 } else { 2461 type = IRDMA_CM_EVENT_CONNECTED; 2462 cm_node->state = IRDMA_CM_STATE_OFFLOADED; 2463 } 2464 irdma_send_ack(cm_node); 2465 break; 2466 default: 2467 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2468 "wrong cm_node state=%d\n", cm_node->state); 2469 break; 2470 } 2471 irdma_create_event(cm_node, type); 2472 } 2473 2474 /** 2475 * irdma_check_syn - Check for error on received syn ack 2476 * @cm_node: connection's node 2477 * @tcph: pointer tcp header 2478 */ 2479 static int 2480 irdma_check_syn(struct irdma_cm_node *cm_node, struct tcphdr *tcph) 2481 { 2482 if (ntohl(tcph->th_ack) != cm_node->tcp_cntxt.loc_seq_num) { 2483 irdma_active_open_err(cm_node, true); 2484 return 1; 2485 } 2486 2487 return 0; 2488 } 2489 2490 /** 2491 * irdma_check_seq - check seq numbers if OK 2492 * @cm_node: connection's node 2493 * @tcph: pointer tcp header 2494 */ 2495 static int 2496 irdma_check_seq(struct irdma_cm_node *cm_node, struct tcphdr *tcph) 2497 { 2498 u32 seq; 2499 u32 ack_seq; 2500 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num; 2501 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt; 2502 u32 rcv_wnd; 2503 int err = 0; 2504 2505 seq = ntohl(tcph->th_seq); 2506 ack_seq = ntohl(tcph->th_ack); 2507 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd; 2508 if (ack_seq != loc_seq_num || 2509 !between(seq, rcv_nxt, (rcv_nxt + rcv_wnd))) 2510 err = -1; 2511 if (err) 2512 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2513 "seq number err\n"); 2514 2515 return err; 2516 } 2517 2518 void 2519 irdma_add_conn_est_qh(struct irdma_cm_node *cm_node) 2520 { 2521 struct irdma_cm_info nfo; 2522 2523 irdma_get_addr_info(cm_node, &nfo); 2524 nfo.qh_qpid = cm_node->iwdev->vsi.ilq->qp_id; 2525 irdma_manage_qhash(cm_node->iwdev, &nfo, 2526 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 2527 IRDMA_QHASH_MANAGE_TYPE_ADD, 2528 cm_node, false); 2529 cm_node->qhash_set = true; 2530 } 2531 2532 /** 2533 * irdma_handle_syn_pkt - is for Passive node 2534 * @cm_node: connection's node 2535 * @rbuf: receive buffer 2536 */ 2537 static void 2538 irdma_handle_syn_pkt(struct irdma_cm_node *cm_node, 2539 struct irdma_puda_buf *rbuf) 2540 { 2541 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2542 int err; 2543 u32 inc_sequence; 2544 int optionsize; 2545 2546 optionsize = (tcph->th_off << 2) - sizeof(*tcph); 2547 inc_sequence = ntohl(tcph->th_seq); 2548 2549 switch (cm_node->state) { 2550 case IRDMA_CM_STATE_SYN_SENT: 2551 case IRDMA_CM_STATE_MPAREQ_SENT: 2552 /* Rcvd syn on active open connection */ 2553 irdma_active_open_err(cm_node, 1); 2554 break; 2555 case IRDMA_CM_STATE_LISTENING: 2556 /* Passive OPEN */ 2557 if (atomic_read(&cm_node->listener->pend_accepts_cnt) > 2558 cm_node->listener->backlog) { 2559 cm_node->cm_core->stats_backlog_drops++; 2560 irdma_passive_open_err(cm_node, false); 2561 break; 2562 } 2563 err = irdma_handle_tcp_options(cm_node, tcph, optionsize, 1); 2564 if (err) { 2565 irdma_passive_open_err(cm_node, false); 2566 /* drop pkt */ 2567 break; 2568 } 2569 err = cm_node->cm_core->cm_create_ah(cm_node, false); 2570 if (err) { 2571 irdma_passive_open_err(cm_node, false); 2572 /* drop pkt */ 2573 break; 2574 } 2575 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; 2576 cm_node->accept_pend = 1; 2577 atomic_inc(&cm_node->listener->pend_accepts_cnt); 2578 2579 cm_node->state = IRDMA_CM_STATE_SYN_RCVD; 2580 break; 2581 case IRDMA_CM_STATE_CLOSED: 2582 irdma_cleanup_retrans_entry(cm_node); 2583 atomic_inc(&cm_node->refcnt); 2584 irdma_send_reset(cm_node); 2585 break; 2586 case IRDMA_CM_STATE_OFFLOADED: 2587 case IRDMA_CM_STATE_ESTABLISHED: 2588 case IRDMA_CM_STATE_FIN_WAIT1: 2589 case IRDMA_CM_STATE_FIN_WAIT2: 2590 case IRDMA_CM_STATE_MPAREQ_RCVD: 2591 case IRDMA_CM_STATE_LAST_ACK: 2592 case IRDMA_CM_STATE_CLOSING: 2593 case IRDMA_CM_STATE_UNKNOWN: 2594 default: 2595 break; 2596 } 2597 } 2598 2599 /** 2600 * irdma_handle_synack_pkt - Process SYN+ACK packet (active side) 2601 * @cm_node: connection's node 2602 * @rbuf: receive buffer 2603 */ 2604 static void 2605 irdma_handle_synack_pkt(struct irdma_cm_node *cm_node, 2606 struct irdma_puda_buf *rbuf) 2607 { 2608 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2609 int err; 2610 u32 inc_sequence; 2611 int optionsize; 2612 2613 optionsize = (tcph->th_off << 2) - sizeof(*tcph); 2614 inc_sequence = ntohl(tcph->th_seq); 2615 switch (cm_node->state) { 2616 case IRDMA_CM_STATE_SYN_SENT: 2617 irdma_cleanup_retrans_entry(cm_node); 2618 /* active open */ 2619 if (irdma_check_syn(cm_node, tcph)) { 2620 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2621 "check syn fail\n"); 2622 return; 2623 } 2624 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->th_ack); 2625 /* setup options */ 2626 err = irdma_handle_tcp_options(cm_node, tcph, optionsize, 0); 2627 if (err) { 2628 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2629 "cm_node=%p tcp_options failed\n", cm_node); 2630 break; 2631 } 2632 irdma_cleanup_retrans_entry(cm_node); 2633 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; 2634 irdma_send_ack(cm_node); /* ACK for the syn_ack */ 2635 err = irdma_send_mpa_request(cm_node); 2636 if (err) { 2637 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2638 "cm_node=%p irdma_send_mpa_request failed\n", 2639 cm_node); 2640 break; 2641 } 2642 cm_node->state = IRDMA_CM_STATE_MPAREQ_SENT; 2643 break; 2644 case IRDMA_CM_STATE_MPAREQ_RCVD: 2645 irdma_passive_open_err(cm_node, true); 2646 break; 2647 case IRDMA_CM_STATE_LISTENING: 2648 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->th_ack); 2649 irdma_cleanup_retrans_entry(cm_node); 2650 cm_node->state = IRDMA_CM_STATE_CLOSED; 2651 irdma_send_reset(cm_node); 2652 break; 2653 case IRDMA_CM_STATE_CLOSED: 2654 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->th_ack); 2655 irdma_cleanup_retrans_entry(cm_node); 2656 atomic_inc(&cm_node->refcnt); 2657 irdma_send_reset(cm_node); 2658 break; 2659 case IRDMA_CM_STATE_ESTABLISHED: 2660 case IRDMA_CM_STATE_FIN_WAIT1: 2661 case IRDMA_CM_STATE_FIN_WAIT2: 2662 case IRDMA_CM_STATE_LAST_ACK: 2663 case IRDMA_CM_STATE_OFFLOADED: 2664 case IRDMA_CM_STATE_CLOSING: 2665 case IRDMA_CM_STATE_UNKNOWN: 2666 case IRDMA_CM_STATE_MPAREQ_SENT: 2667 default: 2668 break; 2669 } 2670 } 2671 2672 /** 2673 * irdma_handle_ack_pkt - process packet with ACK 2674 * @cm_node: connection's node 2675 * @rbuf: receive buffer 2676 */ 2677 static int 2678 irdma_handle_ack_pkt(struct irdma_cm_node *cm_node, 2679 struct irdma_puda_buf *rbuf) 2680 { 2681 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2682 u32 inc_sequence; 2683 int ret; 2684 int optionsize; 2685 u32 datasize = rbuf->datalen; 2686 2687 optionsize = (tcph->th_off << 2) - sizeof(*tcph); 2688 2689 if (irdma_check_seq(cm_node, tcph)) 2690 return -EINVAL; 2691 2692 inc_sequence = ntohl(tcph->th_seq); 2693 switch (cm_node->state) { 2694 case IRDMA_CM_STATE_SYN_RCVD: 2695 irdma_cleanup_retrans_entry(cm_node); 2696 ret = irdma_handle_tcp_options(cm_node, tcph, optionsize, 1); 2697 if (ret) 2698 return ret; 2699 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->th_ack); 2700 cm_node->state = IRDMA_CM_STATE_ESTABLISHED; 2701 if (datasize) { 2702 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; 2703 irdma_handle_rcv_mpa(cm_node, rbuf); 2704 } 2705 break; 2706 case IRDMA_CM_STATE_ESTABLISHED: 2707 irdma_cleanup_retrans_entry(cm_node); 2708 if (datasize) { 2709 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; 2710 irdma_handle_rcv_mpa(cm_node, rbuf); 2711 } 2712 break; 2713 case IRDMA_CM_STATE_MPAREQ_SENT: 2714 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->th_ack); 2715 if (datasize) { 2716 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; 2717 cm_node->ack_rcvd = false; 2718 irdma_handle_rcv_mpa(cm_node, rbuf); 2719 } else { 2720 cm_node->ack_rcvd = true; 2721 } 2722 break; 2723 case IRDMA_CM_STATE_LISTENING: 2724 irdma_cleanup_retrans_entry(cm_node); 2725 cm_node->state = IRDMA_CM_STATE_CLOSED; 2726 irdma_send_reset(cm_node); 2727 break; 2728 case IRDMA_CM_STATE_CLOSED: 2729 irdma_cleanup_retrans_entry(cm_node); 2730 atomic_inc(&cm_node->refcnt); 2731 irdma_send_reset(cm_node); 2732 break; 2733 case IRDMA_CM_STATE_LAST_ACK: 2734 case IRDMA_CM_STATE_CLOSING: 2735 irdma_cleanup_retrans_entry(cm_node); 2736 cm_node->state = IRDMA_CM_STATE_CLOSED; 2737 irdma_rem_ref_cm_node(cm_node); 2738 break; 2739 case IRDMA_CM_STATE_FIN_WAIT1: 2740 irdma_cleanup_retrans_entry(cm_node); 2741 cm_node->state = IRDMA_CM_STATE_FIN_WAIT2; 2742 break; 2743 case IRDMA_CM_STATE_SYN_SENT: 2744 case IRDMA_CM_STATE_FIN_WAIT2: 2745 case IRDMA_CM_STATE_OFFLOADED: 2746 case IRDMA_CM_STATE_MPAREQ_RCVD: 2747 case IRDMA_CM_STATE_UNKNOWN: 2748 default: 2749 irdma_cleanup_retrans_entry(cm_node); 2750 break; 2751 } 2752 2753 return 0; 2754 } 2755 2756 /** 2757 * irdma_process_pkt - process cm packet 2758 * @cm_node: connection's node 2759 * @rbuf: receive buffer 2760 */ 2761 static void 2762 irdma_process_pkt(struct irdma_cm_node *cm_node, 2763 struct irdma_puda_buf *rbuf) 2764 { 2765 enum irdma_tcpip_pkt_type pkt_type = IRDMA_PKT_TYPE_UNKNOWN; 2766 struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; 2767 u32 fin_set = 0; 2768 int err; 2769 2770 if (tcp_get_flags(tcph) & TH_RST) { 2771 pkt_type = IRDMA_PKT_TYPE_RST; 2772 } else if (tcp_get_flags(tcph) & TH_SYN) { 2773 pkt_type = IRDMA_PKT_TYPE_SYN; 2774 if (tcp_get_flags(tcph) & TH_ACK) 2775 pkt_type = IRDMA_PKT_TYPE_SYNACK; 2776 } else if (tcp_get_flags(tcph) & TH_ACK) { 2777 pkt_type = IRDMA_PKT_TYPE_ACK; 2778 } 2779 if (tcp_get_flags(tcph) & TH_FIN) 2780 fin_set = 1; 2781 2782 switch (pkt_type) { 2783 case IRDMA_PKT_TYPE_SYN: 2784 irdma_handle_syn_pkt(cm_node, rbuf); 2785 break; 2786 case IRDMA_PKT_TYPE_SYNACK: 2787 irdma_handle_synack_pkt(cm_node, rbuf); 2788 break; 2789 case IRDMA_PKT_TYPE_ACK: 2790 err = irdma_handle_ack_pkt(cm_node, rbuf); 2791 if (fin_set && !err) 2792 irdma_handle_fin_pkt(cm_node); 2793 break; 2794 case IRDMA_PKT_TYPE_RST: 2795 irdma_handle_rst_pkt(cm_node, rbuf); 2796 break; 2797 default: 2798 if (fin_set && 2799 (!irdma_check_seq(cm_node, (struct tcphdr *)rbuf->tcph))) 2800 irdma_handle_fin_pkt(cm_node); 2801 break; 2802 } 2803 } 2804 2805 /** 2806 * irdma_make_listen_node - create a listen node with params 2807 * @cm_core: cm's core 2808 * @iwdev: iwarp device structure 2809 * @cm_info: quad info for connection 2810 */ 2811 static struct irdma_cm_listener * 2812 irdma_make_listen_node(struct irdma_cm_core *cm_core, 2813 struct irdma_device *iwdev, 2814 struct irdma_cm_info *cm_info) 2815 { 2816 struct irdma_cm_listener *listener; 2817 unsigned long flags; 2818 2819 /* cannot have multiple matching listeners */ 2820 listener = irdma_find_listener(cm_core, cm_info->loc_addr, cm_info->ipv4, 2821 cm_info->loc_port, cm_info->vlan_id, 2822 IRDMA_CM_LISTENER_EITHER_STATE); 2823 if (listener && 2824 listener->listener_state == IRDMA_CM_LISTENER_ACTIVE_STATE) { 2825 atomic_dec(&listener->refcnt); 2826 return NULL; 2827 } 2828 2829 if (!listener) { 2830 /* 2831 * create a CM listen node 1/2 node to compare incoming traffic to 2832 */ 2833 listener = kzalloc(sizeof(*listener), GFP_KERNEL); 2834 if (!listener) 2835 return NULL; 2836 cm_core->stats_listen_nodes_created++; 2837 memcpy(listener->loc_addr, cm_info->loc_addr, 2838 sizeof(listener->loc_addr)); 2839 listener->loc_port = cm_info->loc_port; 2840 2841 INIT_LIST_HEAD(&listener->child_listen_list); 2842 2843 atomic_set(&listener->refcnt, 1); 2844 } else { 2845 listener->reused_node = 1; 2846 } 2847 2848 listener->cm_id = cm_info->cm_id; 2849 listener->ipv4 = cm_info->ipv4; 2850 listener->vlan_id = cm_info->vlan_id; 2851 atomic_set(&listener->pend_accepts_cnt, 0); 2852 listener->cm_core = cm_core; 2853 listener->iwdev = iwdev; 2854 2855 listener->backlog = cm_info->backlog; 2856 listener->listener_state = IRDMA_CM_LISTENER_ACTIVE_STATE; 2857 2858 if (!listener->reused_node) { 2859 spin_lock_irqsave(&cm_core->listen_list_lock, flags); 2860 list_add(&listener->list, &cm_core->listen_list); 2861 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); 2862 } 2863 2864 return listener; 2865 } 2866 2867 /** 2868 * irdma_create_cm_node - make a connection node with params 2869 * @cm_core: cm's core 2870 * @iwdev: iwarp device structure 2871 * @conn_param: connection parameters 2872 * @cm_info: quad info for connection 2873 * @caller_cm_node: pointer to cm_node structure to return 2874 */ 2875 static int 2876 irdma_create_cm_node(struct irdma_cm_core *cm_core, 2877 struct irdma_device *iwdev, 2878 struct iw_cm_conn_param *conn_param, 2879 struct irdma_cm_info *cm_info, 2880 struct irdma_cm_node **caller_cm_node) 2881 { 2882 struct irdma_cm_node *cm_node; 2883 u16 private_data_len = conn_param->private_data_len; 2884 const void *private_data = conn_param->private_data; 2885 2886 /* create a CM connection node */ 2887 cm_node = irdma_make_cm_node(cm_core, iwdev, cm_info, NULL); 2888 if (!cm_node) 2889 return -ENOMEM; 2890 2891 /* set our node side to client (active) side */ 2892 cm_node->tcp_cntxt.client = 1; 2893 cm_node->tcp_cntxt.rcv_wscale = IRDMA_CM_DEFAULT_RCV_WND_SCALE; 2894 2895 irdma_record_ird_ord(cm_node, conn_param->ird, conn_param->ord); 2896 2897 cm_node->pdata.size = private_data_len; 2898 cm_node->pdata.addr = cm_node->pdata_buf; 2899 2900 memcpy(cm_node->pdata_buf, private_data, private_data_len); 2901 *caller_cm_node = cm_node; 2902 2903 return 0; 2904 } 2905 2906 /** 2907 * irdma_cm_reject - reject and teardown a connection 2908 * @cm_node: connection's node 2909 * @pdata: ptr to private data for reject 2910 * @plen: size of private data 2911 */ 2912 static int 2913 irdma_cm_reject(struct irdma_cm_node *cm_node, const void *pdata, 2914 u8 plen) 2915 { 2916 int ret; 2917 int passive_state; 2918 2919 if (cm_node->tcp_cntxt.client) 2920 return 0; 2921 2922 irdma_cleanup_retrans_entry(cm_node); 2923 2924 passive_state = atomic_add_return(1, &cm_node->passive_state); 2925 if (passive_state == IRDMA_SEND_RESET_EVENT) { 2926 cm_node->state = IRDMA_CM_STATE_CLOSED; 2927 irdma_rem_ref_cm_node(cm_node); 2928 return 0; 2929 } 2930 2931 if (cm_node->state == IRDMA_CM_STATE_LISTENER_DESTROYED) { 2932 irdma_rem_ref_cm_node(cm_node); 2933 return 0; 2934 } 2935 2936 ret = irdma_send_mpa_reject(cm_node, pdata, plen); 2937 if (!ret) 2938 return 0; 2939 2940 cm_node->state = IRDMA_CM_STATE_CLOSED; 2941 if (irdma_send_reset(cm_node)) 2942 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2943 "send reset failed\n"); 2944 2945 return ret; 2946 } 2947 2948 /** 2949 * irdma_cm_close - close of cm connection 2950 * @cm_node: connection's node 2951 */ 2952 static int 2953 irdma_cm_close(struct irdma_cm_node *cm_node) 2954 { 2955 switch (cm_node->state) { 2956 case IRDMA_CM_STATE_SYN_RCVD: 2957 case IRDMA_CM_STATE_SYN_SENT: 2958 case IRDMA_CM_STATE_ONE_SIDE_ESTABLISHED: 2959 case IRDMA_CM_STATE_ESTABLISHED: 2960 case IRDMA_CM_STATE_ACCEPTING: 2961 case IRDMA_CM_STATE_MPAREQ_SENT: 2962 case IRDMA_CM_STATE_MPAREQ_RCVD: 2963 irdma_cleanup_retrans_entry(cm_node); 2964 irdma_send_reset(cm_node); 2965 break; 2966 case IRDMA_CM_STATE_CLOSE_WAIT: 2967 cm_node->state = IRDMA_CM_STATE_LAST_ACK; 2968 irdma_send_fin(cm_node); 2969 break; 2970 case IRDMA_CM_STATE_FIN_WAIT1: 2971 case IRDMA_CM_STATE_FIN_WAIT2: 2972 case IRDMA_CM_STATE_LAST_ACK: 2973 case IRDMA_CM_STATE_TIME_WAIT: 2974 case IRDMA_CM_STATE_CLOSING: 2975 return -EINVAL; 2976 case IRDMA_CM_STATE_LISTENING: 2977 irdma_cleanup_retrans_entry(cm_node); 2978 irdma_send_reset(cm_node); 2979 break; 2980 case IRDMA_CM_STATE_MPAREJ_RCVD: 2981 case IRDMA_CM_STATE_UNKNOWN: 2982 case IRDMA_CM_STATE_INITED: 2983 case IRDMA_CM_STATE_CLOSED: 2984 case IRDMA_CM_STATE_LISTENER_DESTROYED: 2985 irdma_rem_ref_cm_node(cm_node); 2986 break; 2987 case IRDMA_CM_STATE_OFFLOADED: 2988 if (cm_node->send_entry) 2989 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 2990 "CM send_entry in OFFLOADED state\n"); 2991 irdma_rem_ref_cm_node(cm_node); 2992 break; 2993 } 2994 2995 return 0; 2996 } 2997 2998 /** 2999 * irdma_receive_ilq - recv an ETHERNET packet, and process it 3000 * through CM 3001 * @vsi: VSI structure of dev 3002 * @rbuf: receive buffer 3003 */ 3004 void 3005 irdma_receive_ilq(struct irdma_sc_vsi *vsi, struct irdma_puda_buf *rbuf) 3006 { 3007 struct irdma_cm_node *cm_node; 3008 struct irdma_cm_listener *listener; 3009 struct ip *iph; 3010 struct ip6_hdr *ip6h; 3011 struct tcphdr *tcph; 3012 struct irdma_cm_info cm_info = {0}; 3013 struct irdma_device *iwdev = vsi->back_vsi; 3014 struct irdma_cm_core *cm_core = &iwdev->cm_core; 3015 struct ether_vlan_header *ethh; 3016 u16 vtag; 3017 3018 /* if vlan, then maclen = 18 else 14 */ 3019 iph = (struct ip *)rbuf->iph; 3020 irdma_debug_buf(vsi->dev, IRDMA_DEBUG_ILQ, "RECEIVE ILQ BUFFER", 3021 rbuf->mem.va, rbuf->totallen); 3022 if (iwdev->rf->sc_dev.hw_attrs.uk_attrs.hw_rev >= IRDMA_GEN_2) { 3023 if (rbuf->vlan_valid) { 3024 vtag = rbuf->vlan_id; 3025 cm_info.user_pri = (vtag & EVL_PRI_MASK) >> 3026 VLAN_PRIO_SHIFT; 3027 cm_info.vlan_id = vtag & EVL_VLID_MASK; 3028 } else { 3029 cm_info.vlan_id = 0xFFFF; 3030 } 3031 } else { 3032 ethh = rbuf->mem.va; 3033 3034 if (ethh->evl_proto == htons(ETH_P_8021Q)) { 3035 vtag = ntohs(ethh->evl_tag); 3036 cm_info.user_pri = (vtag & EVL_PRI_MASK) >> 3037 VLAN_PRIO_SHIFT; 3038 cm_info.vlan_id = vtag & EVL_VLID_MASK; 3039 irdma_debug(&cm_core->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3040 "vlan_id=%d\n", cm_info.vlan_id); 3041 } else { 3042 cm_info.vlan_id = 0xFFFF; 3043 } 3044 } 3045 tcph = (struct tcphdr *)rbuf->tcph; 3046 3047 if (rbuf->ipv4) { 3048 cm_info.loc_addr[0] = ntohl(iph->ip_dst.s_addr); 3049 cm_info.rem_addr[0] = ntohl(iph->ip_src.s_addr); 3050 cm_info.ipv4 = true; 3051 cm_info.tos = iph->ip_tos; 3052 } else { 3053 ip6h = (struct ip6_hdr *)rbuf->iph; 3054 irdma_copy_ip_ntohl(cm_info.loc_addr, 3055 ip6h->ip6_dst.__u6_addr.__u6_addr32); 3056 irdma_copy_ip_ntohl(cm_info.rem_addr, 3057 ip6h->ip6_src.__u6_addr.__u6_addr32); 3058 cm_info.ipv4 = false; 3059 cm_info.tos = (ip6h->ip6_vfc << 4) | ip6h->ip6_flow; 3060 } 3061 cm_info.loc_port = ntohs(tcph->th_dport); 3062 cm_info.rem_port = ntohs(tcph->th_sport); 3063 cm_node = irdma_find_node(cm_core, cm_info.rem_port, cm_info.rem_addr, 3064 cm_info.loc_port, cm_info.loc_addr, cm_info.vlan_id); 3065 3066 if (!cm_node) { 3067 /* 3068 * Only type of packet accepted are for the PASSIVE open (syn only) 3069 */ 3070 if (!(tcp_get_flags(tcph) & TH_SYN) || tcp_get_flags(tcph) & TH_ACK) 3071 return; 3072 3073 listener = irdma_find_listener(cm_core, 3074 cm_info.loc_addr, 3075 cm_info.ipv4, 3076 cm_info.loc_port, 3077 cm_info.vlan_id, 3078 IRDMA_CM_LISTENER_ACTIVE_STATE); 3079 if (!listener) { 3080 cm_info.cm_id = NULL; 3081 irdma_debug(&cm_core->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3082 "no listener found\n"); 3083 return; 3084 } 3085 3086 cm_info.cm_id = listener->cm_id; 3087 cm_node = irdma_make_cm_node(cm_core, iwdev, &cm_info, 3088 listener); 3089 if (!cm_node) { 3090 irdma_debug(&cm_core->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3091 "allocate node failed\n"); 3092 atomic_dec(&listener->refcnt); 3093 return; 3094 } 3095 3096 if (!(tcp_get_flags(tcph) & (TH_RST | TH_FIN))) { 3097 cm_node->state = IRDMA_CM_STATE_LISTENING; 3098 } else { 3099 irdma_rem_ref_cm_node(cm_node); 3100 return; 3101 } 3102 3103 atomic_inc(&cm_node->refcnt); 3104 } else if (cm_node->state == IRDMA_CM_STATE_OFFLOADED) { 3105 irdma_rem_ref_cm_node(cm_node); 3106 return; 3107 } 3108 3109 irdma_process_pkt(cm_node, rbuf); 3110 irdma_rem_ref_cm_node(cm_node); 3111 } 3112 3113 static int 3114 irdma_add_qh(struct irdma_cm_node *cm_node, bool active) 3115 { 3116 if (!active) 3117 irdma_add_conn_est_qh(cm_node); 3118 return 0; 3119 } 3120 3121 static void 3122 irdma_cm_free_ah_nop(struct irdma_cm_node *cm_node) 3123 { 3124 } 3125 3126 /** 3127 * irdma_setup_cm_core - setup top level instance of a cm core 3128 * @iwdev: iwarp device structure 3129 * @rdma_ver: HW version 3130 */ 3131 int 3132 irdma_setup_cm_core(struct irdma_device *iwdev, u8 rdma_ver) 3133 { 3134 struct irdma_cm_core *cm_core = &iwdev->cm_core; 3135 3136 cm_core->iwdev = iwdev; 3137 cm_core->dev = &iwdev->rf->sc_dev; 3138 3139 /* Handles CM event work items send to Iwarp core */ 3140 cm_core->event_wq = alloc_ordered_workqueue("iwarp-event-wq", 0); 3141 if (!cm_core->event_wq) 3142 return -ENOMEM; 3143 3144 INIT_LIST_HEAD(&cm_core->listen_list); 3145 3146 timer_setup(&cm_core->tcp_timer, irdma_cm_timer_tick, 0); 3147 3148 spin_lock_init(&cm_core->ht_lock); 3149 spin_lock_init(&cm_core->listen_list_lock); 3150 spin_lock_init(&cm_core->apbvt_lock); 3151 switch (rdma_ver) { 3152 case IRDMA_GEN_1: 3153 cm_core->form_cm_frame = irdma_form_uda_cm_frame; 3154 cm_core->cm_create_ah = irdma_add_qh; 3155 cm_core->cm_free_ah = irdma_cm_free_ah_nop; 3156 break; 3157 case IRDMA_GEN_2: 3158 default: 3159 cm_core->form_cm_frame = irdma_form_ah_cm_frame; 3160 cm_core->cm_create_ah = irdma_cm_create_ah; 3161 cm_core->cm_free_ah = irdma_cm_free_ah; 3162 } 3163 3164 return 0; 3165 } 3166 3167 /** 3168 * irdma_cleanup_cm_core - deallocate a top level instance of a 3169 * cm core 3170 * @cm_core: cm's core 3171 */ 3172 void 3173 irdma_cleanup_cm_core(struct irdma_cm_core *cm_core) 3174 { 3175 if (!cm_core) 3176 return; 3177 3178 del_timer_sync(&cm_core->tcp_timer); 3179 3180 destroy_workqueue(cm_core->event_wq); 3181 cm_core->dev->ws_reset(&cm_core->iwdev->vsi); 3182 } 3183 3184 /** 3185 * irdma_init_tcp_ctx - setup qp context 3186 * @cm_node: connection's node 3187 * @tcp_info: offload info for tcp 3188 * @iwqp: associate qp for the connection 3189 */ 3190 static void 3191 irdma_init_tcp_ctx(struct irdma_cm_node *cm_node, 3192 struct irdma_tcp_offload_info *tcp_info, 3193 struct irdma_qp *iwqp) 3194 { 3195 tcp_info->ipv4 = cm_node->ipv4; 3196 tcp_info->drop_ooo_seg = !iwqp->iwdev->iw_ooo; 3197 tcp_info->wscale = true; 3198 tcp_info->ignore_tcp_opt = true; 3199 tcp_info->ignore_tcp_uns_opt = true; 3200 tcp_info->no_nagle = false; 3201 3202 tcp_info->ttl = IRDMA_DEFAULT_TTL; 3203 tcp_info->rtt_var = IRDMA_DEFAULT_RTT_VAR; 3204 tcp_info->ss_thresh = IRDMA_DEFAULT_SS_THRESH; 3205 tcp_info->rexmit_thresh = IRDMA_DEFAULT_REXMIT_THRESH; 3206 3207 tcp_info->tcp_state = IRDMA_TCP_STATE_ESTABLISHED; 3208 tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale; 3209 tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale; 3210 3211 tcp_info->snd_nxt = cm_node->tcp_cntxt.loc_seq_num; 3212 tcp_info->snd_wnd = cm_node->tcp_cntxt.snd_wnd; 3213 tcp_info->rcv_nxt = cm_node->tcp_cntxt.rcv_nxt; 3214 tcp_info->snd_max = cm_node->tcp_cntxt.loc_seq_num; 3215 3216 tcp_info->snd_una = cm_node->tcp_cntxt.loc_seq_num; 3217 tcp_info->cwnd = 2 * cm_node->tcp_cntxt.mss; 3218 tcp_info->snd_wl1 = cm_node->tcp_cntxt.rcv_nxt; 3219 tcp_info->snd_wl2 = cm_node->tcp_cntxt.loc_seq_num; 3220 tcp_info->max_snd_window = cm_node->tcp_cntxt.max_snd_wnd; 3221 tcp_info->rcv_wnd = cm_node->tcp_cntxt.rcv_wnd 3222 << cm_node->tcp_cntxt.rcv_wscale; 3223 3224 tcp_info->flow_label = 0; 3225 tcp_info->snd_mss = (u32)cm_node->tcp_cntxt.mss; 3226 tcp_info->tos = cm_node->tos; 3227 if (cm_node->vlan_id < VLAN_N_VID) { 3228 tcp_info->insert_vlan_tag = true; 3229 tcp_info->vlan_tag = cm_node->vlan_id; 3230 tcp_info->vlan_tag |= cm_node->user_pri << VLAN_PRIO_SHIFT; 3231 } 3232 tcp_info->src_port = cm_node->loc_port; 3233 tcp_info->dst_port = cm_node->rem_port; 3234 tcp_info->arp_idx = (u16)irdma_arp_table(iwqp->iwdev->rf, 3235 cm_node->rem_addr, NULL, 3236 IRDMA_ARP_RESOLVE); 3237 if (cm_node->ipv4) { 3238 tcp_info->dest_ip_addr[3] = cm_node->rem_addr[0]; 3239 tcp_info->local_ipaddr[3] = cm_node->loc_addr[0]; 3240 } else { 3241 memcpy(tcp_info->dest_ip_addr, cm_node->rem_addr, 3242 sizeof(tcp_info->dest_ip_addr)); 3243 memcpy(tcp_info->local_ipaddr, cm_node->loc_addr, 3244 sizeof(tcp_info->local_ipaddr)); 3245 } 3246 } 3247 3248 /** 3249 * irdma_cm_init_tsa_conn - setup qp for RTS 3250 * @iwqp: associate qp for the connection 3251 * @cm_node: connection's node 3252 */ 3253 static void 3254 irdma_cm_init_tsa_conn(struct irdma_qp *iwqp, 3255 struct irdma_cm_node *cm_node) 3256 { 3257 struct irdma_iwarp_offload_info *iwarp_info; 3258 struct irdma_qp_host_ctx_info *ctx_info; 3259 3260 iwarp_info = &iwqp->iwarp_info; 3261 ctx_info = &iwqp->ctx_info; 3262 3263 ctx_info->tcp_info = &iwqp->tcp_info; 3264 ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id; 3265 ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id; 3266 3267 iwarp_info->ord_size = cm_node->ord_size; 3268 iwarp_info->ird_size = cm_node->ird_size; 3269 iwarp_info->rd_en = true; 3270 iwarp_info->rdmap_ver = 1; 3271 iwarp_info->ddp_ver = 1; 3272 iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id; 3273 3274 ctx_info->tcp_info_valid = true; 3275 ctx_info->iwarp_info_valid = true; 3276 ctx_info->user_pri = cm_node->user_pri; 3277 3278 irdma_init_tcp_ctx(cm_node, &iwqp->tcp_info, iwqp); 3279 if (cm_node->snd_mark_en) { 3280 iwarp_info->snd_mark_en = true; 3281 iwarp_info->snd_mark_offset = (iwqp->tcp_info.snd_nxt & SNDMARKER_SEQNMASK) + 3282 cm_node->lsmm_size; 3283 } 3284 3285 cm_node->state = IRDMA_CM_STATE_OFFLOADED; 3286 iwqp->tcp_info.tcp_state = IRDMA_TCP_STATE_ESTABLISHED; 3287 iwqp->tcp_info.src_mac_addr_idx = iwqp->iwdev->mac_ip_table_idx; 3288 3289 if (cm_node->rcv_mark_en) { 3290 iwarp_info->rcv_mark_en = true; 3291 iwarp_info->align_hdrs = true; 3292 } 3293 3294 irdma_sc_qp_setctx(&iwqp->sc_qp, iwqp->host_ctx.va, ctx_info); 3295 3296 /* once tcp_info is set, no need to do it again */ 3297 ctx_info->tcp_info_valid = false; 3298 ctx_info->iwarp_info_valid = false; 3299 } 3300 3301 /** 3302 * irdma_cm_disconn - when a connection is being closed 3303 * @iwqp: associated qp for the connection 3304 */ 3305 void 3306 irdma_cm_disconn(struct irdma_qp *iwqp) 3307 { 3308 struct irdma_device *iwdev = iwqp->iwdev; 3309 struct disconn_work *work; 3310 unsigned long flags; 3311 3312 work = kzalloc(sizeof(*work), GFP_ATOMIC); 3313 if (!work) 3314 return; 3315 3316 spin_lock_irqsave(&iwdev->rf->qptable_lock, flags); 3317 if (!iwdev->rf->qp_table[iwqp->ibqp.qp_num]) { 3318 spin_unlock_irqrestore(&iwdev->rf->qptable_lock, flags); 3319 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3320 "qp_id %d is already freed\n", iwqp->ibqp.qp_num); 3321 kfree(work); 3322 return; 3323 } 3324 irdma_qp_add_ref(&iwqp->ibqp); 3325 spin_unlock_irqrestore(&iwdev->rf->qptable_lock, flags); 3326 3327 work->iwqp = iwqp; 3328 INIT_WORK(&work->work, irdma_disconnect_worker); 3329 queue_work(iwdev->cleanup_wq, &work->work); 3330 } 3331 3332 /** 3333 * irdma_qp_disconnect - free qp and close cm 3334 * @iwqp: associate qp for the connection 3335 */ 3336 static void 3337 irdma_qp_disconnect(struct irdma_qp *iwqp) 3338 { 3339 struct irdma_device *iwdev = iwqp->iwdev; 3340 3341 iwqp->active_conn = 0; 3342 /* close the CM node down if it is still active */ 3343 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, "Call close API\n"); 3344 irdma_cm_close(iwqp->cm_node); 3345 } 3346 3347 /** 3348 * irdma_cm_disconn_true - called by worker thread to disconnect qp 3349 * @iwqp: associate qp for the connection 3350 */ 3351 static void 3352 irdma_cm_disconn_true(struct irdma_qp *iwqp) 3353 { 3354 struct iw_cm_id *cm_id; 3355 struct irdma_device *iwdev; 3356 struct irdma_sc_qp *qp = &iwqp->sc_qp; 3357 u16 last_ae; 3358 u8 original_hw_tcp_state; 3359 u8 original_ibqp_state; 3360 int disconn_status = 0; 3361 int issue_disconn = 0; 3362 int issue_close = 0; 3363 int issue_flush = 0; 3364 unsigned long flags; 3365 int err; 3366 3367 iwdev = iwqp->iwdev; 3368 spin_lock_irqsave(&iwqp->lock, flags); 3369 if (rdma_protocol_roce(&iwdev->ibdev, 1)) { 3370 struct ib_qp_attr attr; 3371 3372 if (iwqp->flush_issued || iwqp->sc_qp.qp_uk.destroy_pending) { 3373 spin_unlock_irqrestore(&iwqp->lock, flags); 3374 return; 3375 } 3376 3377 spin_unlock_irqrestore(&iwqp->lock, flags); 3378 3379 attr.qp_state = IB_QPS_ERR; 3380 irdma_modify_qp_roce(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); 3381 irdma_ib_qp_event(iwqp, qp->event_type); 3382 return; 3383 } 3384 3385 cm_id = iwqp->cm_id; 3386 original_hw_tcp_state = iwqp->hw_tcp_state; 3387 original_ibqp_state = iwqp->ibqp_state; 3388 last_ae = iwqp->last_aeq; 3389 3390 if (qp->term_flags) { 3391 issue_disconn = 1; 3392 issue_close = 1; 3393 iwqp->cm_id = NULL; 3394 irdma_terminate_del_timer(qp); 3395 if (!iwqp->flush_issued) { 3396 iwqp->flush_issued = 1; 3397 issue_flush = 1; 3398 } 3399 } else if ((original_hw_tcp_state == IRDMA_TCP_STATE_CLOSE_WAIT) || 3400 ((original_ibqp_state == IB_QPS_RTS) && 3401 (last_ae == IRDMA_AE_LLP_CONNECTION_RESET))) { 3402 issue_disconn = 1; 3403 if (last_ae == IRDMA_AE_LLP_CONNECTION_RESET) 3404 disconn_status = -ECONNRESET; 3405 } 3406 3407 if (original_hw_tcp_state == IRDMA_TCP_STATE_CLOSED || 3408 original_hw_tcp_state == IRDMA_TCP_STATE_TIME_WAIT || 3409 last_ae == IRDMA_AE_RDMAP_ROE_BAD_LLP_CLOSE || 3410 last_ae == IRDMA_AE_BAD_CLOSE || 3411 last_ae == IRDMA_AE_LLP_CONNECTION_RESET || iwdev->rf->reset || !cm_id) { 3412 issue_close = 1; 3413 iwqp->cm_id = NULL; 3414 qp->term_flags = 0; 3415 if (!iwqp->flush_issued) { 3416 iwqp->flush_issued = 1; 3417 issue_flush = 1; 3418 } 3419 } 3420 3421 spin_unlock_irqrestore(&iwqp->lock, flags); 3422 if (issue_flush && !iwqp->sc_qp.qp_uk.destroy_pending) { 3423 irdma_flush_wqes(iwqp, IRDMA_FLUSH_SQ | IRDMA_FLUSH_RQ | 3424 IRDMA_FLUSH_WAIT); 3425 3426 if (qp->term_flags) 3427 irdma_ib_qp_event(iwqp, qp->event_type); 3428 } 3429 3430 if (!cm_id || !cm_id->event_handler) 3431 return; 3432 3433 spin_lock_irqsave(&iwdev->cm_core.ht_lock, flags); 3434 if (!iwqp->cm_node) { 3435 spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags); 3436 return; 3437 } 3438 atomic_inc(&iwqp->cm_node->refcnt); 3439 3440 spin_unlock_irqrestore(&iwdev->cm_core.ht_lock, flags); 3441 3442 if (issue_disconn) { 3443 err = irdma_send_cm_event(iwqp->cm_node, cm_id, 3444 IW_CM_EVENT_DISCONNECT, 3445 disconn_status); 3446 if (err) 3447 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3448 "disconnect event failed: - cm_id = %p\n", 3449 cm_id); 3450 } 3451 if (issue_close) { 3452 cm_id->provider_data = iwqp; 3453 err = irdma_send_cm_event(iwqp->cm_node, cm_id, 3454 IW_CM_EVENT_CLOSE, 0); 3455 if (err) 3456 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3457 "close event failed: - cm_id = %p\n", 3458 cm_id); 3459 irdma_qp_disconnect(iwqp); 3460 } 3461 irdma_rem_ref_cm_node(iwqp->cm_node); 3462 } 3463 3464 /** 3465 * irdma_disconnect_worker - worker for connection close 3466 * @work: points or disconn structure 3467 */ 3468 static void 3469 irdma_disconnect_worker(struct work_struct *work) 3470 { 3471 struct disconn_work *dwork = container_of(work, struct disconn_work, work); 3472 struct irdma_qp *iwqp = dwork->iwqp; 3473 3474 kfree(dwork); 3475 irdma_cm_disconn_true(iwqp); 3476 irdma_qp_rem_ref(&iwqp->ibqp); 3477 } 3478 3479 /** 3480 * irdma_free_lsmm_rsrc - free lsmm memory and deregister 3481 * @iwqp: associate qp for the connection 3482 */ 3483 void 3484 irdma_free_lsmm_rsrc(struct irdma_qp *iwqp) 3485 { 3486 struct irdma_device *iwdev; 3487 3488 iwdev = iwqp->iwdev; 3489 3490 if (iwqp->ietf_mem.va) { 3491 if (iwqp->lsmm_mr) 3492 iwdev->ibdev.dereg_mr(iwqp->lsmm_mr, NULL); 3493 3494 irdma_free_dma_mem(iwdev->rf->sc_dev.hw, 3495 &iwqp->ietf_mem); 3496 iwqp->ietf_mem.va = NULL; 3497 } 3498 } 3499 3500 /** 3501 * irdma_accept - registered call for connection to be accepted 3502 * @cm_id: cm information for passive connection 3503 * @conn_param: accpet parameters 3504 */ 3505 int 3506 irdma_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) 3507 { 3508 struct ib_qp *ibqp; 3509 struct irdma_qp *iwqp; 3510 struct irdma_device *iwdev; 3511 struct irdma_sc_dev *dev; 3512 struct irdma_cm_node *cm_node; 3513 struct ib_qp_attr attr = {0}; 3514 int passive_state; 3515 struct ib_mr *ibmr; 3516 struct irdma_pd *iwpd; 3517 u16 buf_len = 0; 3518 struct irdma_kmem_info accept; 3519 u64 tagged_offset; 3520 int wait_ret; 3521 int ret = 0; 3522 3523 ibqp = irdma_get_qp(cm_id->device, conn_param->qpn); 3524 if (!ibqp) 3525 return -EINVAL; 3526 3527 iwqp = to_iwqp(ibqp); 3528 iwdev = iwqp->iwdev; 3529 dev = &iwdev->rf->sc_dev; 3530 cm_node = cm_id->provider_data; 3531 3532 if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) { 3533 cm_node->ipv4 = true; 3534 cm_node->vlan_id = irdma_get_vlan_ipv4(cm_id, cm_node->loc_addr); 3535 } else { 3536 cm_node->ipv4 = false; 3537 irdma_get_vlan_mac_ipv6(cm_id, cm_node->loc_addr, &cm_node->vlan_id, 3538 NULL); 3539 } 3540 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, "Accept vlan_id=%d\n", 3541 cm_node->vlan_id); 3542 3543 if (cm_node->state == IRDMA_CM_STATE_LISTENER_DESTROYED) { 3544 ret = -EINVAL; 3545 goto error; 3546 } 3547 3548 passive_state = atomic_add_return(1, &cm_node->passive_state); 3549 if (passive_state == IRDMA_SEND_RESET_EVENT) { 3550 ret = -ECONNRESET; 3551 goto error; 3552 } 3553 3554 buf_len = conn_param->private_data_len + IRDMA_MAX_IETF_SIZE; 3555 iwqp->ietf_mem.size = buf_len; 3556 iwqp->ietf_mem.va = irdma_allocate_dma_mem(dev->hw, &iwqp->ietf_mem, 3557 iwqp->ietf_mem.size, 1); 3558 if (!iwqp->ietf_mem.va) { 3559 ret = -ENOMEM; 3560 goto error; 3561 } 3562 3563 cm_node->pdata.size = conn_param->private_data_len; 3564 accept.addr = iwqp->ietf_mem.va; 3565 accept.size = irdma_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY); 3566 memcpy((u8 *)accept.addr + accept.size, conn_param->private_data, 3567 conn_param->private_data_len); 3568 3569 if (cm_node->dev->ws_add(iwqp->sc_qp.vsi, cm_node->user_pri)) { 3570 ret = -ENOMEM; 3571 goto error; 3572 } 3573 iwqp->sc_qp.user_pri = cm_node->user_pri; 3574 irdma_qp_add_qos(&iwqp->sc_qp); 3575 if (cm_node->dev->hw_attrs.uk_attrs.hw_rev == IRDMA_GEN_2) 3576 iwdev->rf->check_fc(&iwdev->vsi, &iwqp->sc_qp); 3577 /* setup our first outgoing iWarp send WQE (the IETF frame response) */ 3578 iwpd = iwqp->iwpd; 3579 tagged_offset = (uintptr_t)iwqp->ietf_mem.va; 3580 ibmr = irdma_reg_phys_mr(&iwpd->ibpd, iwqp->ietf_mem.pa, buf_len, 3581 IB_ACCESS_LOCAL_WRITE, &tagged_offset); 3582 if (IS_ERR(ibmr)) { 3583 ret = -ENOMEM; 3584 goto error; 3585 } 3586 3587 ibmr->pd = &iwpd->ibpd; 3588 ibmr->device = iwpd->ibpd.device; 3589 iwqp->lsmm_mr = ibmr; 3590 if (iwqp->page) 3591 iwqp->sc_qp.qp_uk.sq_base = kmap_local_page(iwqp->page); 3592 3593 cm_node->lsmm_size = accept.size + conn_param->private_data_len; 3594 irdma_sc_send_lsmm(&iwqp->sc_qp, iwqp->ietf_mem.va, cm_node->lsmm_size, 3595 ibmr->lkey); 3596 3597 if (iwqp->page) 3598 kunmap_local(iwqp->sc_qp.qp_uk.sq_base); 3599 3600 iwqp->cm_id = cm_id; 3601 cm_node->cm_id = cm_id; 3602 3603 cm_id->provider_data = iwqp; 3604 iwqp->active_conn = 0; 3605 iwqp->cm_node = cm_node; 3606 cm_node->iwqp = iwqp; 3607 irdma_cm_init_tsa_conn(iwqp, cm_node); 3608 irdma_qp_add_ref(&iwqp->ibqp); 3609 cm_id->add_ref(cm_id); 3610 3611 attr.qp_state = IB_QPS_RTS; 3612 cm_node->qhash_set = false; 3613 cm_node->cm_core->cm_free_ah(cm_node); 3614 3615 irdma_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); 3616 if (dev->hw_attrs.uk_attrs.feature_flags & IRDMA_FEATURE_RTS_AE) { 3617 wait_ret = wait_event_interruptible_timeout(iwqp->waitq, 3618 iwqp->rts_ae_rcvd, 3619 IRDMA_MAX_TIMEOUT); 3620 if (!wait_ret) { 3621 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3622 "Slow Connection: cm_node=%p, loc_port=%d, rem_port=%d, cm_id=%p\n", 3623 cm_node, cm_node->loc_port, 3624 cm_node->rem_port, cm_node->cm_id); 3625 ret = -ECONNRESET; 3626 goto error; 3627 } 3628 } 3629 3630 irdma_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0); 3631 cm_node->accelerated = true; 3632 complete(&cm_node->establish_comp); 3633 3634 if (cm_node->accept_pend) { 3635 atomic_dec(&cm_node->listener->pend_accepts_cnt); 3636 cm_node->accept_pend = 0; 3637 } 3638 3639 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3640 "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", 3641 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr[0], 3642 cm_node->loc_addr[0], cm_node, cm_id, ibqp->qp_num); 3643 cm_node->cm_core->stats_accepts++; 3644 3645 return 0; 3646 error: 3647 irdma_free_lsmm_rsrc(iwqp); 3648 irdma_rem_ref_cm_node(cm_node); 3649 3650 return ret; 3651 } 3652 3653 /** 3654 * irdma_reject - registered call for connection to be rejected 3655 * @cm_id: cm information for passive connection 3656 * @pdata: private data to be sent 3657 * @pdata_len: private data length 3658 */ 3659 int 3660 irdma_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len) 3661 { 3662 struct irdma_device *iwdev; 3663 struct irdma_cm_node *cm_node; 3664 3665 cm_node = cm_id->provider_data; 3666 cm_node->pdata.size = pdata_len; 3667 3668 iwdev = to_iwdev(cm_id->device); 3669 if (!iwdev) 3670 return -EINVAL; 3671 3672 cm_node->cm_core->stats_rejects++; 3673 3674 if (pdata_len + sizeof(struct ietf_mpa_v2) > IRDMA_MAX_CM_BUF) 3675 return -EINVAL; 3676 3677 return irdma_cm_reject(cm_node, pdata, pdata_len); 3678 } 3679 3680 /** 3681 * irdma_connect - registered call for connection to be established 3682 * @cm_id: cm information for passive connection 3683 * @conn_param: Information about the connection 3684 */ 3685 int 3686 irdma_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) 3687 { 3688 struct ib_qp *ibqp; 3689 struct irdma_qp *iwqp; 3690 struct irdma_device *iwdev; 3691 struct irdma_cm_node *cm_node; 3692 struct irdma_cm_info cm_info; 3693 struct sockaddr_in *laddr; 3694 struct sockaddr_in *raddr; 3695 struct sockaddr_in6 *laddr6; 3696 struct sockaddr_in6 *raddr6; 3697 int ret = 0; 3698 3699 ibqp = irdma_get_qp(cm_id->device, conn_param->qpn); 3700 if (!ibqp) 3701 return -EINVAL; 3702 iwqp = to_iwqp(ibqp); 3703 if (!iwqp) 3704 return -EINVAL; 3705 iwdev = iwqp->iwdev; 3706 if (!iwdev) 3707 return -EINVAL; 3708 3709 laddr = (struct sockaddr_in *)&cm_id->m_local_addr; 3710 raddr = (struct sockaddr_in *)&cm_id->m_remote_addr; 3711 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr; 3712 raddr6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr; 3713 3714 if (!(laddr->sin_port) || !(raddr->sin_port)) 3715 return -EINVAL; 3716 3717 iwqp->active_conn = 1; 3718 iwqp->cm_id = NULL; 3719 cm_id->provider_data = iwqp; 3720 3721 /* set up the connection params for the node */ 3722 if (cm_id->remote_addr.ss_family == AF_INET) { 3723 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV4) 3724 return -EINVAL; 3725 3726 cm_info.ipv4 = true; 3727 memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr)); 3728 memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr)); 3729 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr); 3730 cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr); 3731 cm_info.loc_port = ntohs(laddr->sin_port); 3732 cm_info.rem_port = ntohs(raddr->sin_port); 3733 cm_info.vlan_id = irdma_get_vlan_ipv4(cm_id, cm_info.loc_addr); 3734 } else { 3735 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV6) 3736 return -EINVAL; 3737 3738 cm_info.ipv4 = false; 3739 irdma_copy_ip_ntohl(cm_info.loc_addr, 3740 laddr6->sin6_addr.__u6_addr.__u6_addr32); 3741 irdma_copy_ip_ntohl(cm_info.rem_addr, 3742 raddr6->sin6_addr.__u6_addr.__u6_addr32); 3743 cm_info.loc_port = ntohs(laddr6->sin6_port); 3744 cm_info.rem_port = ntohs(raddr6->sin6_port); 3745 irdma_get_vlan_mac_ipv6(cm_id, cm_info.loc_addr, &cm_info.vlan_id, NULL); 3746 } 3747 cm_info.cm_id = cm_id; 3748 cm_info.qh_qpid = iwdev->vsi.ilq->qp_id; 3749 cm_info.tos = cm_id->tos; 3750 if (iwdev->vsi.dscp_mode) { 3751 cm_info.user_pri = 3752 iwqp->sc_qp.vsi->dscp_map[irdma_tos2dscp(cm_info.tos)]; 3753 } else { 3754 cm_info.user_pri = rt_tos2priority(cm_id->tos); 3755 cm_info.user_pri = 3756 irdma_iw_get_vlan_prio(cm_info.loc_addr, 3757 cm_info.user_pri, 3758 cm_info.ipv4); 3759 } 3760 3761 if (iwqp->sc_qp.dev->ws_add(iwqp->sc_qp.vsi, cm_info.user_pri)) 3762 return -ENOMEM; 3763 iwqp->sc_qp.user_pri = cm_info.user_pri; 3764 irdma_qp_add_qos(&iwqp->sc_qp); 3765 if (iwdev->rf->sc_dev.hw_attrs.uk_attrs.hw_rev == IRDMA_GEN_2) 3766 iwdev->rf->check_fc(&iwdev->vsi, &iwqp->sc_qp); 3767 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_DCB, "TOS:[%d] UP:[%d]\n", 3768 cm_id->tos, cm_info.user_pri); 3769 3770 ret = irdma_create_cm_node(&iwdev->cm_core, iwdev, conn_param, &cm_info, 3771 &cm_node); 3772 if (ret) 3773 return ret; 3774 ret = cm_node->cm_core->cm_create_ah(cm_node, true); 3775 if (ret) 3776 goto err; 3777 if (irdma_manage_qhash(iwdev, &cm_info, 3778 IRDMA_QHASH_TYPE_TCP_ESTABLISHED, 3779 IRDMA_QHASH_MANAGE_TYPE_ADD, NULL, true)) { 3780 ret = -EINVAL; 3781 goto err; 3782 } 3783 cm_node->qhash_set = true; 3784 3785 cm_node->apbvt_entry = irdma_add_apbvt(iwdev, cm_info.loc_port); 3786 if (!cm_node->apbvt_entry) { 3787 ret = -EINVAL; 3788 goto err; 3789 } 3790 3791 cm_node->apbvt_set = true; 3792 iwqp->cm_node = cm_node; 3793 cm_node->iwqp = iwqp; 3794 iwqp->cm_id = cm_id; 3795 irdma_qp_add_ref(&iwqp->ibqp); 3796 cm_id->add_ref(cm_id); 3797 3798 if (cm_node->state != IRDMA_CM_STATE_OFFLOADED) { 3799 cm_node->state = IRDMA_CM_STATE_SYN_SENT; 3800 ret = irdma_send_syn(cm_node, 0); 3801 if (ret) 3802 goto err; 3803 } 3804 3805 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3806 "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", 3807 cm_node->rem_port, cm_node->loc_port, cm_node->rem_addr[0], 3808 cm_node->loc_addr[0], cm_node, cm_id, ibqp->qp_num); 3809 3810 return 0; 3811 3812 err: 3813 if (cm_info.ipv4) 3814 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3815 "connect() FAILED: dest addr=%x", 3816 cm_info.rem_addr[0]); 3817 else 3818 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3819 "connect() FAILED: dest addr=%x:%x:%x:%x", 3820 IRDMA_PRINT_IP6(cm_info.rem_addr)); 3821 irdma_rem_ref_cm_node(cm_node); 3822 iwdev->cm_core.stats_connect_errs++; 3823 3824 return ret; 3825 } 3826 3827 /** 3828 * irdma_create_listen - registered call creating listener 3829 * @cm_id: cm information for passive connection 3830 * @backlog: to max accept pending count 3831 */ 3832 int 3833 irdma_create_listen(struct iw_cm_id *cm_id, int backlog) 3834 { 3835 struct irdma_device *iwdev; 3836 struct irdma_cm_listener *cm_listen_node; 3837 struct irdma_cm_info cm_info = {0}; 3838 struct sockaddr_in *laddr; 3839 struct sockaddr_in6 *laddr6; 3840 bool wildcard = false; 3841 int err; 3842 3843 iwdev = to_iwdev(cm_id->device); 3844 if (!iwdev) 3845 return -EINVAL; 3846 3847 laddr = (struct sockaddr_in *)&cm_id->m_local_addr; 3848 laddr6 = (struct sockaddr_in6 *)&cm_id->m_local_addr; 3849 cm_info.qh_qpid = iwdev->vsi.ilq->qp_id; 3850 3851 if (laddr->sin_family == AF_INET) { 3852 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV4) 3853 return -EINVAL; 3854 3855 cm_info.ipv4 = true; 3856 cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr); 3857 cm_info.loc_port = ntohs(laddr->sin_port); 3858 3859 if (laddr->sin_addr.s_addr != htonl(INADDR_ANY)) { 3860 cm_info.vlan_id = irdma_get_vlan_ipv4(cm_id, cm_info.loc_addr); 3861 } else { 3862 cm_info.vlan_id = 0xFFFF; 3863 wildcard = true; 3864 } 3865 } else { 3866 if (iwdev->vsi.mtu < IRDMA_MIN_MTU_IPV6) 3867 return -EINVAL; 3868 3869 cm_info.ipv4 = false; 3870 irdma_copy_ip_ntohl(cm_info.loc_addr, 3871 laddr6->sin6_addr.__u6_addr.__u6_addr32); 3872 cm_info.loc_port = ntohs(laddr6->sin6_port); 3873 if (!IN6_IS_ADDR_UNSPECIFIED(&laddr6->sin6_addr)) { 3874 irdma_get_vlan_mac_ipv6(cm_id, cm_info.loc_addr, 3875 &cm_info.vlan_id, NULL); 3876 } else { 3877 cm_info.vlan_id = 0xFFFF; 3878 wildcard = true; 3879 } 3880 } 3881 3882 if (cm_info.vlan_id >= VLAN_N_VID && iwdev->dcb_vlan_mode) 3883 cm_info.vlan_id = 0; 3884 cm_info.backlog = backlog; 3885 cm_info.cm_id = cm_id; 3886 3887 cm_listen_node = irdma_make_listen_node(&iwdev->cm_core, iwdev, 3888 &cm_info); 3889 if (!cm_listen_node) { 3890 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3891 "cm_listen_node == NULL\n"); 3892 return -ENOMEM; 3893 } 3894 3895 cm_id->provider_data = cm_listen_node; 3896 3897 cm_listen_node->tos = cm_id->tos; 3898 if (iwdev->vsi.dscp_mode) 3899 cm_listen_node->user_pri = 3900 iwdev->vsi.dscp_map[irdma_tos2dscp(cm_id->tos)]; 3901 else 3902 cm_listen_node->user_pri = rt_tos2priority(cm_id->tos); 3903 cm_info.user_pri = cm_listen_node->user_pri; 3904 if (!cm_listen_node->reused_node) { 3905 if (wildcard) { 3906 err = irdma_add_mqh(iwdev, &cm_info, cm_listen_node); 3907 if (err) 3908 goto error; 3909 } else { 3910 if (!iwdev->vsi.dscp_mode) 3911 cm_info.user_pri = cm_listen_node->user_pri = 3912 irdma_iw_get_vlan_prio(cm_info.loc_addr, 3913 cm_info.user_pri, 3914 cm_info.ipv4); 3915 err = irdma_manage_qhash(iwdev, &cm_info, 3916 IRDMA_QHASH_TYPE_TCP_SYN, 3917 IRDMA_QHASH_MANAGE_TYPE_ADD, 3918 NULL, true); 3919 if (err) 3920 goto error; 3921 3922 cm_listen_node->qhash_set = true; 3923 } 3924 3925 cm_listen_node->apbvt_entry = irdma_add_apbvt(iwdev, 3926 cm_info.loc_port); 3927 if (!cm_listen_node->apbvt_entry) 3928 goto error; 3929 } 3930 cm_id->add_ref(cm_id); 3931 cm_listen_node->cm_core->stats_listen_created++; 3932 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3933 "loc_port=0x%04x loc_addr=%x cm_listen_node=%p cm_id=%p qhash_set=%d vlan_id=%d\n", 3934 cm_listen_node->loc_port, cm_listen_node->loc_addr[0], 3935 cm_listen_node, cm_listen_node->cm_id, 3936 cm_listen_node->qhash_set, cm_listen_node->vlan_id); 3937 3938 return 0; 3939 3940 error: 3941 3942 irdma_cm_del_listen(&iwdev->cm_core, cm_listen_node, false); 3943 3944 return -EINVAL; 3945 } 3946 3947 /** 3948 * irdma_destroy_listen - registered call to destroy listener 3949 * @cm_id: cm information for passive connection 3950 */ 3951 int 3952 irdma_destroy_listen(struct iw_cm_id *cm_id) 3953 { 3954 struct irdma_device *iwdev; 3955 3956 iwdev = to_iwdev(cm_id->device); 3957 if (cm_id->provider_data) 3958 irdma_cm_del_listen(&iwdev->cm_core, cm_id->provider_data, 3959 true); 3960 else 3961 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 3962 "cm_id->provider_data was NULL\n"); 3963 3964 cm_id->rem_ref(cm_id); 3965 3966 return 0; 3967 } 3968 3969 /** 3970 * irdma_iw_teardown_list_prep - add conn nodes slated for tear 3971 * down to list 3972 * @cm_core: cm's core 3973 * @teardown_list: a list to which cm_node will be selected 3974 * @ipaddr: pointer to ip address 3975 * @nfo: pointer to cm_info structure instance 3976 * @disconnect_all: flag indicating disconnect all QPs 3977 */ 3978 static void 3979 irdma_iw_teardown_list_prep(struct irdma_cm_core *cm_core, 3980 struct list_head *teardown_list, 3981 u32 *ipaddr, 3982 struct irdma_cm_info *nfo, 3983 bool disconnect_all) 3984 { 3985 struct irdma_cm_node *cm_node; 3986 int bkt; 3987 3988 HASH_FOR_EACH_RCU(cm_core->cm_hash_tbl, bkt, cm_node, list) { 3989 if ((disconnect_all || 3990 (nfo->vlan_id == cm_node->vlan_id && 3991 !memcmp(cm_node->loc_addr, ipaddr, nfo->ipv4 ? 4 : 16))) && 3992 atomic_inc_not_zero(&cm_node->refcnt)) 3993 list_add(&cm_node->teardown_entry, teardown_list); 3994 } 3995 } 3996 3997 static inline bool 3998 irdma_ip_vlan_match(u32 *ip1, u16 vlan_id1, 3999 bool check_vlan, u32 *ip2, 4000 u16 vlan_id2, bool ipv4) 4001 { 4002 return (!check_vlan || vlan_id1 == vlan_id2) && 4003 !memcmp(ip1, ip2, ipv4 ? 4 : 16); 4004 } 4005 4006 /** 4007 * irdma_roce_teardown_list_prep - add conn nodes slated for 4008 * tear down to list 4009 * @iwdev: RDMA device 4010 * @teardown_list: a list to which cm_node will be selected 4011 * @ipaddr: pointer to ip address 4012 * @nfo: pointer to cm_info structure instance 4013 * @disconnect_all: flag indicating disconnect all QPs 4014 */ 4015 static void 4016 irdma_roce_teardown_list_prep(struct irdma_device *iwdev, 4017 struct list_head *teardown_list, 4018 u32 *ipaddr, 4019 struct irdma_cm_info *nfo, 4020 bool disconnect_all) 4021 { 4022 struct irdma_sc_vsi *vsi = &iwdev->vsi; 4023 struct irdma_sc_qp *sc_qp; 4024 struct list_head *list_node; 4025 struct irdma_qp *qp; 4026 unsigned long flags; 4027 int i; 4028 4029 for (i = 0; i < IRDMA_MAX_USER_PRIORITY; i++) { 4030 mutex_lock(&vsi->qos[i].qos_mutex); 4031 list_for_each(list_node, &vsi->qos[i].qplist) { 4032 u32 qp_ip[4]; 4033 4034 sc_qp = container_of(list_node, struct irdma_sc_qp, 4035 list); 4036 if (sc_qp->qp_uk.qp_type != IRDMA_QP_TYPE_ROCE_RC) 4037 continue; 4038 4039 qp = sc_qp->qp_uk.back_qp; 4040 if (!disconnect_all) { 4041 if (nfo->ipv4) 4042 qp_ip[0] = qp->udp_info.local_ipaddr[3]; 4043 else 4044 memcpy(qp_ip, 4045 &qp->udp_info.local_ipaddr[0], 4046 sizeof(qp_ip)); 4047 } 4048 4049 if (disconnect_all || 4050 irdma_ip_vlan_match(qp_ip, 4051 qp->udp_info.vlan_tag & EVL_VLID_MASK, 4052 qp->udp_info.insert_vlan_tag, 4053 ipaddr, nfo->vlan_id, nfo->ipv4)) { 4054 spin_lock_irqsave(&iwdev->rf->qptable_lock, flags); 4055 if (iwdev->rf->qp_table[sc_qp->qp_uk.qp_id]) { 4056 irdma_qp_add_ref(&qp->ibqp); 4057 list_add(&qp->teardown_entry, teardown_list); 4058 } 4059 spin_unlock_irqrestore(&iwdev->rf->qptable_lock, flags); 4060 } 4061 } 4062 mutex_unlock(&vsi->qos[i].qos_mutex); 4063 } 4064 } 4065 4066 /** 4067 * irdma_cm_event_connected - handle connected active node 4068 * @event: the info for cm_node of connection 4069 */ 4070 static void 4071 irdma_cm_event_connected(struct irdma_cm_event *event) 4072 { 4073 struct irdma_qp *iwqp; 4074 struct irdma_device *iwdev; 4075 struct irdma_cm_node *cm_node; 4076 struct irdma_sc_dev *dev; 4077 struct ib_qp_attr attr = {0}; 4078 struct iw_cm_id *cm_id; 4079 int status; 4080 bool read0; 4081 int wait_ret = 0; 4082 4083 cm_node = event->cm_node; 4084 cm_id = cm_node->cm_id; 4085 iwqp = cm_id->provider_data; 4086 iwdev = iwqp->iwdev; 4087 dev = &iwdev->rf->sc_dev; 4088 if (iwqp->sc_qp.qp_uk.destroy_pending) { 4089 status = -ETIMEDOUT; 4090 goto error; 4091 } 4092 4093 irdma_cm_init_tsa_conn(iwqp, cm_node); 4094 read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO); 4095 if (iwqp->page) 4096 iwqp->sc_qp.qp_uk.sq_base = kmap_local_page(iwqp->page); 4097 irdma_sc_send_rtt(&iwqp->sc_qp, read0); 4098 if (iwqp->page) 4099 kunmap_local(iwqp->sc_qp.qp_uk.sq_base); 4100 4101 attr.qp_state = IB_QPS_RTS; 4102 cm_node->qhash_set = false; 4103 irdma_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); 4104 if (dev->hw_attrs.uk_attrs.feature_flags & IRDMA_FEATURE_RTS_AE) { 4105 wait_ret = wait_event_interruptible_timeout(iwqp->waitq, 4106 iwqp->rts_ae_rcvd, 4107 IRDMA_MAX_TIMEOUT); 4108 if (!wait_ret) 4109 irdma_debug(&iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 4110 "Slow Connection: cm_node=%p, loc_port=%d, rem_port=%d, cm_id=%p\n", 4111 cm_node, cm_node->loc_port, 4112 cm_node->rem_port, cm_node->cm_id); 4113 } 4114 4115 irdma_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 0); 4116 cm_node->accelerated = true; 4117 complete(&cm_node->establish_comp); 4118 cm_node->cm_core->cm_free_ah(cm_node); 4119 return; 4120 4121 error: 4122 iwqp->cm_id = NULL; 4123 cm_id->provider_data = NULL; 4124 irdma_send_cm_event(event->cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 4125 status); 4126 irdma_rem_ref_cm_node(event->cm_node); 4127 } 4128 4129 /** 4130 * irdma_cm_event_reset - handle reset 4131 * @event: the info for cm_node of connection 4132 */ 4133 static void 4134 irdma_cm_event_reset(struct irdma_cm_event *event) 4135 { 4136 struct irdma_cm_node *cm_node = event->cm_node; 4137 struct iw_cm_id *cm_id = cm_node->cm_id; 4138 struct irdma_qp *iwqp; 4139 4140 if (!cm_id) 4141 return; 4142 4143 iwqp = cm_id->provider_data; 4144 if (!iwqp) 4145 return; 4146 4147 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 4148 "reset event %p - cm_id = %p\n", event->cm_node, cm_id); 4149 iwqp->cm_id = NULL; 4150 4151 irdma_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT, 4152 -ECONNRESET); 4153 irdma_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0); 4154 } 4155 4156 /** 4157 * irdma_cm_event_handler - send event to cm upper layer 4158 * @work: pointer of cm event info. 4159 */ 4160 static void 4161 irdma_cm_event_handler(struct work_struct *work) 4162 { 4163 struct irdma_cm_event *event = container_of(work, struct irdma_cm_event, event_work); 4164 struct irdma_cm_node *cm_node; 4165 4166 if (!event || !event->cm_node || !event->cm_node->cm_core) 4167 return; 4168 4169 cm_node = event->cm_node; 4170 4171 switch (event->type) { 4172 case IRDMA_CM_EVENT_MPA_REQ: 4173 irdma_send_cm_event(cm_node, cm_node->cm_id, 4174 IW_CM_EVENT_CONNECT_REQUEST, 0); 4175 break; 4176 case IRDMA_CM_EVENT_RESET: 4177 irdma_cm_event_reset(event); 4178 break; 4179 case IRDMA_CM_EVENT_CONNECTED: 4180 if (!event->cm_node->cm_id || 4181 event->cm_node->state != IRDMA_CM_STATE_OFFLOADED) 4182 break; 4183 irdma_cm_event_connected(event); 4184 break; 4185 case IRDMA_CM_EVENT_MPA_REJECT: 4186 if (!event->cm_node->cm_id || 4187 cm_node->state == IRDMA_CM_STATE_OFFLOADED) 4188 break; 4189 irdma_send_cm_event(cm_node, cm_node->cm_id, 4190 IW_CM_EVENT_CONNECT_REPLY, -ECONNREFUSED); 4191 break; 4192 case IRDMA_CM_EVENT_ABORTED: 4193 if (!event->cm_node->cm_id || 4194 event->cm_node->state == IRDMA_CM_STATE_OFFLOADED) 4195 break; 4196 irdma_event_connect_error(event); 4197 break; 4198 default: 4199 irdma_debug(&cm_node->iwdev->rf->sc_dev, IRDMA_DEBUG_CM, 4200 "bad event type = %d\n", event->type); 4201 break; 4202 } 4203 4204 irdma_rem_ref_cm_node(event->cm_node); 4205 kfree(event); 4206 } 4207 4208 /** 4209 * irdma_cm_post_event - queue event request for worker thread 4210 * @event: cm node's info for up event call 4211 */ 4212 static void 4213 irdma_cm_post_event(struct irdma_cm_event *event) 4214 { 4215 atomic_inc(&event->cm_node->refcnt); 4216 INIT_WORK(&event->event_work, irdma_cm_event_handler); 4217 queue_work(event->cm_node->cm_core->event_wq, &event->event_work); 4218 } 4219 4220 /** 4221 * irdma_cm_teardown_connections - teardown QPs 4222 * @iwdev: device pointer 4223 * @ipaddr: Pointer to IPv4 or IPv6 address 4224 * @nfo: Connection info 4225 * @disconnect_all: flag indicating disconnect all QPs 4226 * 4227 * teardown QPs where source or destination addr matches ip addr 4228 */ 4229 static void __unused 4230 irdma_cm_teardown_connections(struct irdma_device *iwdev, 4231 u32 *ipaddr, 4232 struct irdma_cm_info *nfo, 4233 bool disconnect_all) 4234 { 4235 struct irdma_cm_core *cm_core = &iwdev->cm_core; 4236 struct list_head *list_core_temp; 4237 struct list_head *list_node; 4238 struct irdma_cm_node *cm_node; 4239 struct list_head teardown_list; 4240 struct ib_qp_attr attr; 4241 struct irdma_qp *qp; 4242 4243 INIT_LIST_HEAD(&teardown_list); 4244 4245 rcu_read_lock(); 4246 irdma_iw_teardown_list_prep(cm_core, &teardown_list, ipaddr, nfo, disconnect_all); 4247 rcu_read_unlock(); 4248 4249 attr.qp_state = IB_QPS_ERR; 4250 list_for_each_safe(list_node, list_core_temp, &teardown_list) { 4251 cm_node = container_of(list_node, struct irdma_cm_node, 4252 teardown_entry); 4253 irdma_modify_qp(&cm_node->iwqp->ibqp, &attr, IB_QP_STATE, NULL); 4254 if (iwdev->rf->reset) 4255 irdma_cm_disconn(cm_node->iwqp); 4256 irdma_rem_ref_cm_node(cm_node); 4257 } 4258 4259 if (!rdma_protocol_roce(&iwdev->ibdev, 1)) 4260 return; 4261 4262 INIT_LIST_HEAD(&teardown_list); 4263 irdma_roce_teardown_list_prep(iwdev, &teardown_list, ipaddr, nfo, disconnect_all); 4264 4265 list_for_each_safe(list_node, list_core_temp, &teardown_list) { 4266 qp = container_of(list_node, struct irdma_qp, teardown_entry); 4267 irdma_modify_qp_roce(&qp->ibqp, &attr, IB_QP_STATE, NULL); 4268 irdma_ib_qp_event(qp, IRDMA_QP_EVENT_CATASTROPHIC); 4269 irdma_qp_rem_ref(&qp->ibqp); 4270 } 4271 } 4272