1/* 2 * Copyright (c) 2009-2014 Chelsio, Inc. All rights reserved. 3 * 4 * This software is available to you under a choice of one of two 5 * licenses. You may choose to be licensed under the terms of the GNU 6 * General Public License (GPL) Version 2, available from the file 7 * COPYING in the main directory of this source tree, or the 8 * OpenIB.org BSD license below: 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 14 * - Redistributions of source code must retain the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer. 17 * 18 * - Redistributions in binary form must reproduce the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer in the documentation and/or other materials 21 * provided with the distribution. 22 * 23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30 * SOFTWARE. 31 */ 32#include <linux/module.h> 33#include <linux/list.h> 34#include <linux/workqueue.h> 35#include <linux/skbuff.h> 36#include <linux/timer.h> 37#include <linux/notifier.h> 38#include <linux/inetdevice.h> 39#include <linux/ip.h> 40#include <linux/tcp.h> 41#include <linux/if_vlan.h> 42 43#include <net/neighbour.h> 44#include <net/netevent.h> 45#include <net/route.h> 46#include <net/tcp.h> 47#include <net/ip6_route.h> 48#include <net/addrconf.h> 49 50#include <rdma/ib_addr.h> 51 52#include <libcxgb_cm.h> 53#include "iw_cxgb4.h" 54#include "clip_tbl.h" 55 56static char *states[] = { 57 "idle", 58 "listen", 59 "connecting", 60 "mpa_wait_req", 61 "mpa_req_sent", 62 "mpa_req_rcvd", 63 "mpa_rep_sent", 64 "fpdu_mode", 65 "aborting", 66 "closing", 67 "moribund", 68 "dead", 69 NULL, 70}; 71 72static int nocong; 73module_param(nocong, int, 0644); 74MODULE_PARM_DESC(nocong, "Turn of congestion control (default=0)"); 75 76static int enable_ecn; 77module_param(enable_ecn, int, 0644); 78MODULE_PARM_DESC(enable_ecn, "Enable ECN (default=0/disabled)"); 79 80static int dack_mode; 81module_param(dack_mode, int, 0644); 82MODULE_PARM_DESC(dack_mode, "Delayed ack mode (default=0)"); 83 84uint c4iw_max_read_depth = 32; 85module_param(c4iw_max_read_depth, int, 0644); 86MODULE_PARM_DESC(c4iw_max_read_depth, 87 "Per-connection max ORD/IRD (default=32)"); 88 89static int enable_tcp_timestamps; 90module_param(enable_tcp_timestamps, int, 0644); 91MODULE_PARM_DESC(enable_tcp_timestamps, "Enable tcp timestamps (default=0)"); 92 93static int enable_tcp_sack; 94module_param(enable_tcp_sack, int, 0644); 95MODULE_PARM_DESC(enable_tcp_sack, "Enable tcp SACK (default=0)"); 96 97static int enable_tcp_window_scaling = 1; 98module_param(enable_tcp_window_scaling, int, 0644); 99MODULE_PARM_DESC(enable_tcp_window_scaling, 100 "Enable tcp window scaling (default=1)"); 101 102static int peer2peer = 1; 103module_param(peer2peer, int, 0644); 104MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=1)"); 105 106static int p2p_type = FW_RI_INIT_P2PTYPE_READ_REQ; 107module_param(p2p_type, int, 0644); 108MODULE_PARM_DESC(p2p_type, "RDMAP opcode to use for the RTR message: " 109 "1=RDMA_READ 0=RDMA_WRITE (default 1)"); 110 111static int ep_timeout_secs = 60; 112module_param(ep_timeout_secs, int, 0644); 113MODULE_PARM_DESC(ep_timeout_secs, "CM Endpoint operation timeout " 114 "in seconds (default=60)"); 115 116static int mpa_rev = 2; 117module_param(mpa_rev, int, 0644); 118MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, " 119 "1 is RFC5044 spec compliant, 2 is IETF MPA Peer Connect Draft" 120 " compliant (default=2)"); 121 122static int markers_enabled; 123module_param(markers_enabled, int, 0644); 124MODULE_PARM_DESC(markers_enabled, "Enable MPA MARKERS (default(0)=disabled)"); 125 126static int crc_enabled = 1; 127module_param(crc_enabled, int, 0644); 128MODULE_PARM_DESC(crc_enabled, "Enable MPA CRC (default(1)=enabled)"); 129 130static int rcv_win = 256 * 1024; 131module_param(rcv_win, int, 0644); 132MODULE_PARM_DESC(rcv_win, "TCP receive window in bytes (default=256KB)"); 133 134static int snd_win = 128 * 1024; 135module_param(snd_win, int, 0644); 136MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=128KB)"); 137 138static struct workqueue_struct *workq; 139 140static struct sk_buff_head rxq; 141 142static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp); 143static void ep_timeout(struct timer_list *t); 144static void connect_reply_upcall(struct c4iw_ep *ep, int status); 145static int sched(struct c4iw_dev *dev, struct sk_buff *skb); 146 147static LIST_HEAD(timeout_list); 148static spinlock_t timeout_lock; 149 150static void deref_cm_id(struct c4iw_ep_common *epc) 151{ 152 epc->cm_id->rem_ref(epc->cm_id); 153 epc->cm_id = NULL; 154 set_bit(CM_ID_DEREFED, &epc->history); 155} 156 157static void ref_cm_id(struct c4iw_ep_common *epc) 158{ 159 set_bit(CM_ID_REFED, &epc->history); 160 epc->cm_id->add_ref(epc->cm_id); 161} 162 163static void deref_qp(struct c4iw_ep *ep) 164{ 165 c4iw_qp_rem_ref(&ep->com.qp->ibqp); 166 clear_bit(QP_REFERENCED, &ep->com.flags); 167 set_bit(QP_DEREFED, &ep->com.history); 168} 169 170static void ref_qp(struct c4iw_ep *ep) 171{ 172 set_bit(QP_REFERENCED, &ep->com.flags); 173 set_bit(QP_REFED, &ep->com.history); 174 c4iw_qp_add_ref(&ep->com.qp->ibqp); 175} 176 177static void start_ep_timer(struct c4iw_ep *ep) 178{ 179 pr_debug("ep %p\n", ep); 180 if (timer_pending(&ep->timer)) { 181 pr_err("%s timer already started! ep %p\n", 182 __func__, ep); 183 return; 184 } 185 clear_bit(TIMEOUT, &ep->com.flags); 186 c4iw_get_ep(&ep->com); 187 ep->timer.expires = jiffies + ep_timeout_secs * HZ; 188 add_timer(&ep->timer); 189} 190 191static int stop_ep_timer(struct c4iw_ep *ep) 192{ 193 pr_debug("ep %p stopping\n", ep); 194 del_timer_sync(&ep->timer); 195 if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) { 196 c4iw_put_ep(&ep->com); 197 return 0; 198 } 199 return 1; 200} 201 202static int c4iw_l2t_send(struct c4iw_rdev *rdev, struct sk_buff *skb, 203 struct l2t_entry *l2e) 204{ 205 int error = 0; 206 207 if (c4iw_fatal_error(rdev)) { 208 kfree_skb(skb); 209 pr_err("%s - device in error state - dropping\n", __func__); 210 return -EIO; 211 } 212 error = cxgb4_l2t_send(rdev->lldi.ports[0], skb, l2e); 213 if (error < 0) 214 kfree_skb(skb); 215 else if (error == NET_XMIT_DROP) 216 return -ENOMEM; 217 return error < 0 ? error : 0; 218} 219 220int c4iw_ofld_send(struct c4iw_rdev *rdev, struct sk_buff *skb) 221{ 222 int error = 0; 223 224 if (c4iw_fatal_error(rdev)) { 225 kfree_skb(skb); 226 pr_err("%s - device in error state - dropping\n", __func__); 227 return -EIO; 228 } 229 error = cxgb4_ofld_send(rdev->lldi.ports[0], skb); 230 if (error < 0) 231 kfree_skb(skb); 232 return error < 0 ? error : 0; 233} 234 235static void release_tid(struct c4iw_rdev *rdev, u32 hwtid, struct sk_buff *skb) 236{ 237 u32 len = roundup(sizeof(struct cpl_tid_release), 16); 238 239 skb = get_skb(skb, len, GFP_KERNEL); 240 if (!skb) 241 return; 242 243 cxgb_mk_tid_release(skb, len, hwtid, 0); 244 c4iw_ofld_send(rdev, skb); 245 return; 246} 247 248static void set_emss(struct c4iw_ep *ep, u16 opt) 249{ 250 ep->emss = ep->com.dev->rdev.lldi.mtus[TCPOPT_MSS_G(opt)] - 251 ((AF_INET == ep->com.remote_addr.ss_family) ? 252 sizeof(struct iphdr) : sizeof(struct ipv6hdr)) - 253 sizeof(struct tcphdr); 254 ep->mss = ep->emss; 255 if (TCPOPT_TSTAMP_G(opt)) 256 ep->emss -= round_up(TCPOLEN_TIMESTAMP, 4); 257 if (ep->emss < 128) 258 ep->emss = 128; 259 if (ep->emss & 7) 260 pr_debug("Warning: misaligned mtu idx %u mss %u emss=%u\n", 261 TCPOPT_MSS_G(opt), ep->mss, ep->emss); 262 pr_debug("mss_idx %u mss %u emss=%u\n", TCPOPT_MSS_G(opt), ep->mss, 263 ep->emss); 264} 265 266static enum c4iw_ep_state state_read(struct c4iw_ep_common *epc) 267{ 268 enum c4iw_ep_state state; 269 270 mutex_lock(&epc->mutex); 271 state = epc->state; 272 mutex_unlock(&epc->mutex); 273 return state; 274} 275 276static void __state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new) 277{ 278 epc->state = new; 279} 280 281static void state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new) 282{ 283 mutex_lock(&epc->mutex); 284 pr_debug("%s -> %s\n", states[epc->state], states[new]); 285 __state_set(epc, new); 286 mutex_unlock(&epc->mutex); 287 return; 288} 289 290static int alloc_ep_skb_list(struct sk_buff_head *ep_skb_list, int size) 291{ 292 struct sk_buff *skb; 293 unsigned int i; 294 size_t len; 295 296 len = roundup(sizeof(union cpl_wr_size), 16); 297 for (i = 0; i < size; i++) { 298 skb = alloc_skb(len, GFP_KERNEL); 299 if (!skb) 300 goto fail; 301 skb_queue_tail(ep_skb_list, skb); 302 } 303 return 0; 304fail: 305 skb_queue_purge(ep_skb_list); 306 return -ENOMEM; 307} 308 309static void *alloc_ep(int size, gfp_t gfp) 310{ 311 struct c4iw_ep_common *epc; 312 313 epc = kzalloc(size, gfp); 314 if (epc) { 315 epc->wr_waitp = c4iw_alloc_wr_wait(gfp); 316 if (!epc->wr_waitp) { 317 kfree(epc); 318 epc = NULL; 319 goto out; 320 } 321 kref_init(&epc->kref); 322 mutex_init(&epc->mutex); 323 c4iw_init_wr_wait(epc->wr_waitp); 324 } 325 pr_debug("alloc ep %p\n", epc); 326out: 327 return epc; 328} 329 330static void remove_ep_tid(struct c4iw_ep *ep) 331{ 332 unsigned long flags; 333 334 xa_lock_irqsave(&ep->com.dev->hwtids, flags); 335 __xa_erase(&ep->com.dev->hwtids, ep->hwtid); 336 if (xa_empty(&ep->com.dev->hwtids)) 337 wake_up(&ep->com.dev->wait); 338 xa_unlock_irqrestore(&ep->com.dev->hwtids, flags); 339} 340 341static int insert_ep_tid(struct c4iw_ep *ep) 342{ 343 unsigned long flags; 344 int err; 345 346 xa_lock_irqsave(&ep->com.dev->hwtids, flags); 347 err = __xa_insert(&ep->com.dev->hwtids, ep->hwtid, ep, GFP_KERNEL); 348 xa_unlock_irqrestore(&ep->com.dev->hwtids, flags); 349 350 return err; 351} 352 353/* 354 * Atomically lookup the ep ptr given the tid and grab a reference on the ep. 355 */ 356static struct c4iw_ep *get_ep_from_tid(struct c4iw_dev *dev, unsigned int tid) 357{ 358 struct c4iw_ep *ep; 359 unsigned long flags; 360 361 xa_lock_irqsave(&dev->hwtids, flags); 362 ep = xa_load(&dev->hwtids, tid); 363 if (ep) 364 c4iw_get_ep(&ep->com); 365 xa_unlock_irqrestore(&dev->hwtids, flags); 366 return ep; 367} 368 369/* 370 * Atomically lookup the ep ptr given the stid and grab a reference on the ep. 371 */ 372static struct c4iw_listen_ep *get_ep_from_stid(struct c4iw_dev *dev, 373 unsigned int stid) 374{ 375 struct c4iw_listen_ep *ep; 376 unsigned long flags; 377 378 xa_lock_irqsave(&dev->stids, flags); 379 ep = xa_load(&dev->stids, stid); 380 if (ep) 381 c4iw_get_ep(&ep->com); 382 xa_unlock_irqrestore(&dev->stids, flags); 383 return ep; 384} 385 386void _c4iw_free_ep(struct kref *kref) 387{ 388 struct c4iw_ep *ep; 389 390 ep = container_of(kref, struct c4iw_ep, com.kref); 391 pr_debug("ep %p state %s\n", ep, states[ep->com.state]); 392 if (test_bit(QP_REFERENCED, &ep->com.flags)) 393 deref_qp(ep); 394 if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) { 395 if (ep->com.remote_addr.ss_family == AF_INET6) { 396 struct sockaddr_in6 *sin6 = 397 (struct sockaddr_in6 *) 398 &ep->com.local_addr; 399 400 cxgb4_clip_release( 401 ep->com.dev->rdev.lldi.ports[0], 402 (const u32 *)&sin6->sin6_addr.s6_addr, 403 1); 404 } 405 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid, 406 ep->com.local_addr.ss_family); 407 dst_release(ep->dst); 408 cxgb4_l2t_release(ep->l2t); 409 kfree_skb(ep->mpa_skb); 410 } 411 if (!skb_queue_empty(&ep->com.ep_skb_list)) 412 skb_queue_purge(&ep->com.ep_skb_list); 413 c4iw_put_wr_wait(ep->com.wr_waitp); 414 kfree(ep); 415} 416 417static void release_ep_resources(struct c4iw_ep *ep) 418{ 419 set_bit(RELEASE_RESOURCES, &ep->com.flags); 420 421 /* 422 * If we have a hwtid, then remove it from the idr table 423 * so lookups will no longer find this endpoint. Otherwise 424 * we have a race where one thread finds the ep ptr just 425 * before the other thread is freeing the ep memory. 426 */ 427 if (ep->hwtid != -1) 428 remove_ep_tid(ep); 429 c4iw_put_ep(&ep->com); 430} 431 432static int status2errno(int status) 433{ 434 switch (status) { 435 case CPL_ERR_NONE: 436 return 0; 437 case CPL_ERR_CONN_RESET: 438 return -ECONNRESET; 439 case CPL_ERR_ARP_MISS: 440 return -EHOSTUNREACH; 441 case CPL_ERR_CONN_TIMEDOUT: 442 return -ETIMEDOUT; 443 case CPL_ERR_TCAM_FULL: 444 return -ENOMEM; 445 case CPL_ERR_CONN_EXIST: 446 return -EADDRINUSE; 447 default: 448 return -EIO; 449 } 450} 451 452/* 453 * Try and reuse skbs already allocated... 454 */ 455static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp) 456{ 457 if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) { 458 skb_trim(skb, 0); 459 skb_get(skb); 460 skb_reset_transport_header(skb); 461 } else { 462 skb = alloc_skb(len, gfp); 463 if (!skb) 464 return NULL; 465 } 466 t4_set_arp_err_handler(skb, NULL, NULL); 467 return skb; 468} 469 470static struct net_device *get_real_dev(struct net_device *egress_dev) 471{ 472 return rdma_vlan_dev_real_dev(egress_dev) ? : egress_dev; 473} 474 475static void arp_failure_discard(void *handle, struct sk_buff *skb) 476{ 477 pr_err("ARP failure\n"); 478 kfree_skb(skb); 479} 480 481static void mpa_start_arp_failure(void *handle, struct sk_buff *skb) 482{ 483 pr_err("ARP failure during MPA Negotiation - Closing Connection\n"); 484} 485 486enum { 487 NUM_FAKE_CPLS = 2, 488 FAKE_CPL_PUT_EP_SAFE = NUM_CPL_CMDS + 0, 489 FAKE_CPL_PASS_PUT_EP_SAFE = NUM_CPL_CMDS + 1, 490}; 491 492static int _put_ep_safe(struct c4iw_dev *dev, struct sk_buff *skb) 493{ 494 struct c4iw_ep *ep; 495 496 ep = *((struct c4iw_ep **)(skb->cb + 2 * sizeof(void *))); 497 release_ep_resources(ep); 498 return 0; 499} 500 501static int _put_pass_ep_safe(struct c4iw_dev *dev, struct sk_buff *skb) 502{ 503 struct c4iw_ep *ep; 504 505 ep = *((struct c4iw_ep **)(skb->cb + 2 * sizeof(void *))); 506 c4iw_put_ep(&ep->parent_ep->com); 507 release_ep_resources(ep); 508 return 0; 509} 510 511/* 512 * Fake up a special CPL opcode and call sched() so process_work() will call 513 * _put_ep_safe() in a safe context to free the ep resources. This is needed 514 * because ARP error handlers are called in an ATOMIC context, and 515 * _c4iw_free_ep() needs to block. 516 */ 517static void queue_arp_failure_cpl(struct c4iw_ep *ep, struct sk_buff *skb, 518 int cpl) 519{ 520 struct cpl_act_establish *rpl = cplhdr(skb); 521 522 /* Set our special ARP_FAILURE opcode */ 523 rpl->ot.opcode = cpl; 524 525 /* 526 * Save ep in the skb->cb area, after where sched() will save the dev 527 * ptr. 528 */ 529 *((struct c4iw_ep **)(skb->cb + 2 * sizeof(void *))) = ep; 530 sched(ep->com.dev, skb); 531} 532 533/* Handle an ARP failure for an accept */ 534static void pass_accept_rpl_arp_failure(void *handle, struct sk_buff *skb) 535{ 536 struct c4iw_ep *ep = handle; 537 538 pr_err("ARP failure during accept - tid %u - dropping connection\n", 539 ep->hwtid); 540 541 __state_set(&ep->com, DEAD); 542 queue_arp_failure_cpl(ep, skb, FAKE_CPL_PASS_PUT_EP_SAFE); 543} 544 545/* 546 * Handle an ARP failure for an active open. 547 */ 548static void act_open_req_arp_failure(void *handle, struct sk_buff *skb) 549{ 550 struct c4iw_ep *ep = handle; 551 552 pr_err("ARP failure during connect\n"); 553 connect_reply_upcall(ep, -EHOSTUNREACH); 554 __state_set(&ep->com, DEAD); 555 if (ep->com.remote_addr.ss_family == AF_INET6) { 556 struct sockaddr_in6 *sin6 = 557 (struct sockaddr_in6 *)&ep->com.local_addr; 558 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0], 559 (const u32 *)&sin6->sin6_addr.s6_addr, 1); 560 } 561 xa_erase_irq(&ep->com.dev->atids, ep->atid); 562 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid); 563 queue_arp_failure_cpl(ep, skb, FAKE_CPL_PUT_EP_SAFE); 564} 565 566/* 567 * Handle an ARP failure for a CPL_ABORT_REQ. Change it into a no RST variant 568 * and send it along. 569 */ 570static void abort_arp_failure(void *handle, struct sk_buff *skb) 571{ 572 int ret; 573 struct c4iw_ep *ep = handle; 574 struct c4iw_rdev *rdev = &ep->com.dev->rdev; 575 struct cpl_abort_req *req = cplhdr(skb); 576 577 pr_debug("rdev %p\n", rdev); 578 req->cmd = CPL_ABORT_NO_RST; 579 skb_get(skb); 580 ret = c4iw_ofld_send(rdev, skb); 581 if (ret) { 582 __state_set(&ep->com, DEAD); 583 queue_arp_failure_cpl(ep, skb, FAKE_CPL_PUT_EP_SAFE); 584 } else 585 kfree_skb(skb); 586} 587 588static int send_flowc(struct c4iw_ep *ep) 589{ 590 struct fw_flowc_wr *flowc; 591 struct sk_buff *skb = skb_dequeue(&ep->com.ep_skb_list); 592 u16 vlan = ep->l2t->vlan; 593 int nparams; 594 int flowclen, flowclen16; 595 596 if (WARN_ON(!skb)) 597 return -ENOMEM; 598 599 if (vlan == CPL_L2T_VLAN_NONE) 600 nparams = 9; 601 else 602 nparams = 10; 603 604 flowclen = offsetof(struct fw_flowc_wr, mnemval[nparams]); 605 flowclen16 = DIV_ROUND_UP(flowclen, 16); 606 flowclen = flowclen16 * 16; 607 608 flowc = __skb_put(skb, flowclen); 609 memset(flowc, 0, flowclen); 610 611 flowc->op_to_nparams = cpu_to_be32(FW_WR_OP_V(FW_FLOWC_WR) | 612 FW_FLOWC_WR_NPARAMS_V(nparams)); 613 flowc->flowid_len16 = cpu_to_be32(FW_WR_LEN16_V(flowclen16) | 614 FW_WR_FLOWID_V(ep->hwtid)); 615 616 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN; 617 flowc->mnemval[0].val = cpu_to_be32(FW_PFVF_CMD_PFN_V 618 (ep->com.dev->rdev.lldi.pf)); 619 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH; 620 flowc->mnemval[1].val = cpu_to_be32(ep->tx_chan); 621 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT; 622 flowc->mnemval[2].val = cpu_to_be32(ep->tx_chan); 623 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID; 624 flowc->mnemval[3].val = cpu_to_be32(ep->rss_qid); 625 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT; 626 flowc->mnemval[4].val = cpu_to_be32(ep->snd_seq); 627 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT; 628 flowc->mnemval[5].val = cpu_to_be32(ep->rcv_seq); 629 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF; 630 flowc->mnemval[6].val = cpu_to_be32(ep->snd_win); 631 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS; 632 flowc->mnemval[7].val = cpu_to_be32(ep->emss); 633 flowc->mnemval[8].mnemonic = FW_FLOWC_MNEM_RCV_SCALE; 634 flowc->mnemval[8].val = cpu_to_be32(ep->snd_wscale); 635 if (nparams == 10) { 636 u16 pri; 637 pri = (vlan & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT; 638 flowc->mnemval[9].mnemonic = FW_FLOWC_MNEM_SCHEDCLASS; 639 flowc->mnemval[9].val = cpu_to_be32(pri); 640 } 641 642 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx); 643 return c4iw_ofld_send(&ep->com.dev->rdev, skb); 644} 645 646static int send_halfclose(struct c4iw_ep *ep) 647{ 648 struct sk_buff *skb = skb_dequeue(&ep->com.ep_skb_list); 649 u32 wrlen = roundup(sizeof(struct cpl_close_con_req), 16); 650 651 pr_debug("ep %p tid %u\n", ep, ep->hwtid); 652 if (WARN_ON(!skb)) 653 return -ENOMEM; 654 655 cxgb_mk_close_con_req(skb, wrlen, ep->hwtid, ep->txq_idx, 656 NULL, arp_failure_discard); 657 658 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t); 659} 660 661static void read_tcb(struct c4iw_ep *ep) 662{ 663 struct sk_buff *skb; 664 struct cpl_get_tcb *req; 665 int wrlen = roundup(sizeof(*req), 16); 666 667 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); 668 if (WARN_ON(!skb)) 669 return; 670 671 set_wr_txq(skb, CPL_PRIORITY_CONTROL, ep->ctrlq_idx); 672 req = (struct cpl_get_tcb *) skb_put(skb, wrlen); 673 memset(req, 0, wrlen); 674 INIT_TP_WR(req, ep->hwtid); 675 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_GET_TCB, ep->hwtid)); 676 req->reply_ctrl = htons(REPLY_CHAN_V(0) | QUEUENO_V(ep->rss_qid)); 677 678 /* 679 * keep a ref on the ep so the tcb is not unlocked before this 680 * cpl completes. The ref is released in read_tcb_rpl(). 681 */ 682 c4iw_get_ep(&ep->com); 683 if (WARN_ON(c4iw_ofld_send(&ep->com.dev->rdev, skb))) 684 c4iw_put_ep(&ep->com); 685} 686 687static int send_abort_req(struct c4iw_ep *ep) 688{ 689 u32 wrlen = roundup(sizeof(struct cpl_abort_req), 16); 690 struct sk_buff *req_skb = skb_dequeue(&ep->com.ep_skb_list); 691 692 pr_debug("ep %p tid %u\n", ep, ep->hwtid); 693 if (WARN_ON(!req_skb)) 694 return -ENOMEM; 695 696 cxgb_mk_abort_req(req_skb, wrlen, ep->hwtid, ep->txq_idx, 697 ep, abort_arp_failure); 698 699 return c4iw_l2t_send(&ep->com.dev->rdev, req_skb, ep->l2t); 700} 701 702static int send_abort(struct c4iw_ep *ep) 703{ 704 if (!ep->com.qp || !ep->com.qp->srq) { 705 send_abort_req(ep); 706 return 0; 707 } 708 set_bit(ABORT_REQ_IN_PROGRESS, &ep->com.flags); 709 read_tcb(ep); 710 return 0; 711} 712 713static int send_connect(struct c4iw_ep *ep) 714{ 715 struct cpl_act_open_req *req = NULL; 716 struct cpl_t5_act_open_req *t5req = NULL; 717 struct cpl_t6_act_open_req *t6req = NULL; 718 struct cpl_act_open_req6 *req6 = NULL; 719 struct cpl_t5_act_open_req6 *t5req6 = NULL; 720 struct cpl_t6_act_open_req6 *t6req6 = NULL; 721 struct sk_buff *skb; 722 u64 opt0; 723 u32 opt2; 724 unsigned int mtu_idx; 725 u32 wscale; 726 int win, sizev4, sizev6, wrlen; 727 struct sockaddr_in *la = (struct sockaddr_in *) 728 &ep->com.local_addr; 729 struct sockaddr_in *ra = (struct sockaddr_in *) 730 &ep->com.remote_addr; 731 struct sockaddr_in6 *la6 = (struct sockaddr_in6 *) 732 &ep->com.local_addr; 733 struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *) 734 &ep->com.remote_addr; 735 int ret; 736 enum chip_type adapter_type = ep->com.dev->rdev.lldi.adapter_type; 737 u32 isn = (prandom_u32() & ~7UL) - 1; 738 struct net_device *netdev; 739 u64 params; 740 741 netdev = ep->com.dev->rdev.lldi.ports[0]; 742 743 switch (CHELSIO_CHIP_VERSION(adapter_type)) { 744 case CHELSIO_T4: 745 sizev4 = sizeof(struct cpl_act_open_req); 746 sizev6 = sizeof(struct cpl_act_open_req6); 747 break; 748 case CHELSIO_T5: 749 sizev4 = sizeof(struct cpl_t5_act_open_req); 750 sizev6 = sizeof(struct cpl_t5_act_open_req6); 751 break; 752 case CHELSIO_T6: 753 sizev4 = sizeof(struct cpl_t6_act_open_req); 754 sizev6 = sizeof(struct cpl_t6_act_open_req6); 755 break; 756 default: 757 pr_err("T%d Chip is not supported\n", 758 CHELSIO_CHIP_VERSION(adapter_type)); 759 return -EINVAL; 760 } 761 762 wrlen = (ep->com.remote_addr.ss_family == AF_INET) ? 763 roundup(sizev4, 16) : 764 roundup(sizev6, 16); 765 766 pr_debug("ep %p atid %u\n", ep, ep->atid); 767 768 skb = get_skb(NULL, wrlen, GFP_KERNEL); 769 if (!skb) { 770 pr_err("%s - failed to alloc skb\n", __func__); 771 return -ENOMEM; 772 } 773 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx); 774 775 cxgb_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx, 776 enable_tcp_timestamps, 777 (ep->com.remote_addr.ss_family == AF_INET) ? 0 : 1); 778 wscale = cxgb_compute_wscale(rcv_win); 779 780 /* 781 * Specify the largest window that will fit in opt0. The 782 * remainder will be specified in the rx_data_ack. 783 */ 784 win = ep->rcv_win >> 10; 785 if (win > RCV_BUFSIZ_M) 786 win = RCV_BUFSIZ_M; 787 788 opt0 = (nocong ? NO_CONG_F : 0) | 789 KEEP_ALIVE_F | 790 DELACK_F | 791 WND_SCALE_V(wscale) | 792 MSS_IDX_V(mtu_idx) | 793 L2T_IDX_V(ep->l2t->idx) | 794 TX_CHAN_V(ep->tx_chan) | 795 SMAC_SEL_V(ep->smac_idx) | 796 DSCP_V(ep->tos >> 2) | 797 ULP_MODE_V(ULP_MODE_TCPDDP) | 798 RCV_BUFSIZ_V(win); 799 opt2 = RX_CHANNEL_V(0) | 800 CCTRL_ECN_V(enable_ecn) | 801 RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid); 802 if (enable_tcp_timestamps) 803 opt2 |= TSTAMPS_EN_F; 804 if (enable_tcp_sack) 805 opt2 |= SACK_EN_F; 806 if (wscale && enable_tcp_window_scaling) 807 opt2 |= WND_SCALE_EN_F; 808 if (CHELSIO_CHIP_VERSION(adapter_type) > CHELSIO_T4) { 809 if (peer2peer) 810 isn += 4; 811 812 opt2 |= T5_OPT_2_VALID_F; 813 opt2 |= CONG_CNTRL_V(CONG_ALG_TAHOE); 814 opt2 |= T5_ISS_F; 815 } 816 817 params = cxgb4_select_ntuple(netdev, ep->l2t); 818 819 if (ep->com.remote_addr.ss_family == AF_INET6) 820 cxgb4_clip_get(ep->com.dev->rdev.lldi.ports[0], 821 (const u32 *)&la6->sin6_addr.s6_addr, 1); 822 823 t4_set_arp_err_handler(skb, ep, act_open_req_arp_failure); 824 825 if (ep->com.remote_addr.ss_family == AF_INET) { 826 switch (CHELSIO_CHIP_VERSION(adapter_type)) { 827 case CHELSIO_T4: 828 req = skb_put(skb, wrlen); 829 INIT_TP_WR(req, 0); 830 break; 831 case CHELSIO_T5: 832 t5req = skb_put(skb, wrlen); 833 INIT_TP_WR(t5req, 0); 834 req = (struct cpl_act_open_req *)t5req; 835 break; 836 case CHELSIO_T6: 837 t6req = skb_put(skb, wrlen); 838 INIT_TP_WR(t6req, 0); 839 req = (struct cpl_act_open_req *)t6req; 840 t5req = (struct cpl_t5_act_open_req *)t6req; 841 break; 842 default: 843 pr_err("T%d Chip is not supported\n", 844 CHELSIO_CHIP_VERSION(adapter_type)); 845 ret = -EINVAL; 846 goto clip_release; 847 } 848 849 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, 850 ((ep->rss_qid<<14) | ep->atid))); 851 req->local_port = la->sin_port; 852 req->peer_port = ra->sin_port; 853 req->local_ip = la->sin_addr.s_addr; 854 req->peer_ip = ra->sin_addr.s_addr; 855 req->opt0 = cpu_to_be64(opt0); 856 857 if (is_t4(ep->com.dev->rdev.lldi.adapter_type)) { 858 req->params = cpu_to_be32(params); 859 req->opt2 = cpu_to_be32(opt2); 860 } else { 861 if (is_t5(ep->com.dev->rdev.lldi.adapter_type)) { 862 t5req->params = 863 cpu_to_be64(FILTER_TUPLE_V(params)); 864 t5req->rsvd = cpu_to_be32(isn); 865 pr_debug("snd_isn %u\n", t5req->rsvd); 866 t5req->opt2 = cpu_to_be32(opt2); 867 } else { 868 t6req->params = 869 cpu_to_be64(FILTER_TUPLE_V(params)); 870 t6req->rsvd = cpu_to_be32(isn); 871 pr_debug("snd_isn %u\n", t6req->rsvd); 872 t6req->opt2 = cpu_to_be32(opt2); 873 } 874 } 875 } else { 876 switch (CHELSIO_CHIP_VERSION(adapter_type)) { 877 case CHELSIO_T4: 878 req6 = skb_put(skb, wrlen); 879 INIT_TP_WR(req6, 0); 880 break; 881 case CHELSIO_T5: 882 t5req6 = skb_put(skb, wrlen); 883 INIT_TP_WR(t5req6, 0); 884 req6 = (struct cpl_act_open_req6 *)t5req6; 885 break; 886 case CHELSIO_T6: 887 t6req6 = skb_put(skb, wrlen); 888 INIT_TP_WR(t6req6, 0); 889 req6 = (struct cpl_act_open_req6 *)t6req6; 890 t5req6 = (struct cpl_t5_act_open_req6 *)t6req6; 891 break; 892 default: 893 pr_err("T%d Chip is not supported\n", 894 CHELSIO_CHIP_VERSION(adapter_type)); 895 ret = -EINVAL; 896 goto clip_release; 897 } 898 899 OPCODE_TID(req6) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6, 900 ((ep->rss_qid<<14)|ep->atid))); 901 req6->local_port = la6->sin6_port; 902 req6->peer_port = ra6->sin6_port; 903 req6->local_ip_hi = *((__be64 *)(la6->sin6_addr.s6_addr)); 904 req6->local_ip_lo = *((__be64 *)(la6->sin6_addr.s6_addr + 8)); 905 req6->peer_ip_hi = *((__be64 *)(ra6->sin6_addr.s6_addr)); 906 req6->peer_ip_lo = *((__be64 *)(ra6->sin6_addr.s6_addr + 8)); 907 req6->opt0 = cpu_to_be64(opt0); 908 909 if (is_t4(ep->com.dev->rdev.lldi.adapter_type)) { 910 req6->params = cpu_to_be32(cxgb4_select_ntuple(netdev, 911 ep->l2t)); 912 req6->opt2 = cpu_to_be32(opt2); 913 } else { 914 if (is_t5(ep->com.dev->rdev.lldi.adapter_type)) { 915 t5req6->params = 916 cpu_to_be64(FILTER_TUPLE_V(params)); 917 t5req6->rsvd = cpu_to_be32(isn); 918 pr_debug("snd_isn %u\n", t5req6->rsvd); 919 t5req6->opt2 = cpu_to_be32(opt2); 920 } else { 921 t6req6->params = 922 cpu_to_be64(FILTER_TUPLE_V(params)); 923 t6req6->rsvd = cpu_to_be32(isn); 924 pr_debug("snd_isn %u\n", t6req6->rsvd); 925 t6req6->opt2 = cpu_to_be32(opt2); 926 } 927 928 } 929 } 930 931 set_bit(ACT_OPEN_REQ, &ep->com.history); 932 ret = c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t); 933clip_release: 934 if (ret && ep->com.remote_addr.ss_family == AF_INET6) 935 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0], 936 (const u32 *)&la6->sin6_addr.s6_addr, 1); 937 return ret; 938} 939 940static int send_mpa_req(struct c4iw_ep *ep, struct sk_buff *skb, 941 u8 mpa_rev_to_use) 942{ 943 int mpalen, wrlen, ret; 944 struct fw_ofld_tx_data_wr *req; 945 struct mpa_message *mpa; 946 struct mpa_v2_conn_params mpa_v2_params; 947 948 pr_debug("ep %p tid %u pd_len %d\n", 949 ep, ep->hwtid, ep->plen); 950 951 mpalen = sizeof(*mpa) + ep->plen; 952 if (mpa_rev_to_use == 2) 953 mpalen += sizeof(struct mpa_v2_conn_params); 954 wrlen = roundup(mpalen + sizeof(*req), 16); 955 skb = get_skb(skb, wrlen, GFP_KERNEL); 956 if (!skb) { 957 connect_reply_upcall(ep, -ENOMEM); 958 return -ENOMEM; 959 } 960 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx); 961 962 req = skb_put_zero(skb, wrlen); 963 req->op_to_immdlen = cpu_to_be32( 964 FW_WR_OP_V(FW_OFLD_TX_DATA_WR) | 965 FW_WR_COMPL_F | 966 FW_WR_IMMDLEN_V(mpalen)); 967 req->flowid_len16 = cpu_to_be32( 968 FW_WR_FLOWID_V(ep->hwtid) | 969 FW_WR_LEN16_V(wrlen >> 4)); 970 req->plen = cpu_to_be32(mpalen); 971 req->tunnel_to_proxy = cpu_to_be32( 972 FW_OFLD_TX_DATA_WR_FLUSH_F | 973 FW_OFLD_TX_DATA_WR_SHOVE_F); 974 975 mpa = (struct mpa_message *)(req + 1); 976 memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key)); 977 978 mpa->flags = 0; 979 if (crc_enabled) 980 mpa->flags |= MPA_CRC; 981 if (markers_enabled) { 982 mpa->flags |= MPA_MARKERS; 983 ep->mpa_attr.recv_marker_enabled = 1; 984 } else { 985 ep->mpa_attr.recv_marker_enabled = 0; 986 } 987 if (mpa_rev_to_use == 2) 988 mpa->flags |= MPA_ENHANCED_RDMA_CONN; 989 990 mpa->private_data_size = htons(ep->plen); 991 mpa->revision = mpa_rev_to_use; 992 if (mpa_rev_to_use == 1) { 993 ep->tried_with_mpa_v1 = 1; 994 ep->retry_with_mpa_v1 = 0; 995 } 996 997 if (mpa_rev_to_use == 2) { 998 mpa->private_data_size = 999 htons(ntohs(mpa->private_data_size) + 1000 sizeof(struct mpa_v2_conn_params)); 1001 pr_debug("initiator ird %u ord %u\n", ep->ird, 1002 ep->ord); 1003 mpa_v2_params.ird = htons((u16)ep->ird); 1004 mpa_v2_params.ord = htons((u16)ep->ord); 1005 1006 if (peer2peer) { 1007 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL); 1008 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE) 1009 mpa_v2_params.ord |= 1010 htons(MPA_V2_RDMA_WRITE_RTR); 1011 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ) 1012 mpa_v2_params.ord |= 1013 htons(MPA_V2_RDMA_READ_RTR); 1014 } 1015 memcpy(mpa->private_data, &mpa_v2_params, 1016 sizeof(struct mpa_v2_conn_params)); 1017 1018 if (ep->plen) 1019 memcpy(mpa->private_data + 1020 sizeof(struct mpa_v2_conn_params), 1021 ep->mpa_pkt + sizeof(*mpa), ep->plen); 1022 } else 1023 if (ep->plen) 1024 memcpy(mpa->private_data, 1025 ep->mpa_pkt + sizeof(*mpa), ep->plen); 1026 1027 /* 1028 * Reference the mpa skb. This ensures the data area 1029 * will remain in memory until the hw acks the tx. 1030 * Function fw4_ack() will deref it. 1031 */ 1032 skb_get(skb); 1033 t4_set_arp_err_handler(skb, NULL, arp_failure_discard); 1034 ep->mpa_skb = skb; 1035 ret = c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t); 1036 if (ret) 1037 return ret; 1038 start_ep_timer(ep); 1039 __state_set(&ep->com, MPA_REQ_SENT); 1040 ep->mpa_attr.initiator = 1; 1041 ep->snd_seq += mpalen; 1042 return ret; 1043} 1044 1045static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen) 1046{ 1047 int mpalen, wrlen; 1048 struct fw_ofld_tx_data_wr *req; 1049 struct mpa_message *mpa; 1050 struct sk_buff *skb; 1051 struct mpa_v2_conn_params mpa_v2_params; 1052 1053 pr_debug("ep %p tid %u pd_len %d\n", 1054 ep, ep->hwtid, ep->plen); 1055 1056 mpalen = sizeof(*mpa) + plen; 1057 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) 1058 mpalen += sizeof(struct mpa_v2_conn_params); 1059 wrlen = roundup(mpalen + sizeof(*req), 16); 1060 1061 skb = get_skb(NULL, wrlen, GFP_KERNEL); 1062 if (!skb) { 1063 pr_err("%s - cannot alloc skb!\n", __func__); 1064 return -ENOMEM; 1065 } 1066 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx); 1067 1068 req = skb_put_zero(skb, wrlen); 1069 req->op_to_immdlen = cpu_to_be32( 1070 FW_WR_OP_V(FW_OFLD_TX_DATA_WR) | 1071 FW_WR_COMPL_F | 1072 FW_WR_IMMDLEN_V(mpalen)); 1073 req->flowid_len16 = cpu_to_be32( 1074 FW_WR_FLOWID_V(ep->hwtid) | 1075 FW_WR_LEN16_V(wrlen >> 4)); 1076 req->plen = cpu_to_be32(mpalen); 1077 req->tunnel_to_proxy = cpu_to_be32( 1078 FW_OFLD_TX_DATA_WR_FLUSH_F | 1079 FW_OFLD_TX_DATA_WR_SHOVE_F); 1080 1081 mpa = (struct mpa_message *)(req + 1); 1082 memset(mpa, 0, sizeof(*mpa)); 1083 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key)); 1084 mpa->flags = MPA_REJECT; 1085 mpa->revision = ep->mpa_attr.version; 1086 mpa->private_data_size = htons(plen); 1087 1088 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) { 1089 mpa->flags |= MPA_ENHANCED_RDMA_CONN; 1090 mpa->private_data_size = 1091 htons(ntohs(mpa->private_data_size) + 1092 sizeof(struct mpa_v2_conn_params)); 1093 mpa_v2_params.ird = htons(((u16)ep->ird) | 1094 (peer2peer ? MPA_V2_PEER2PEER_MODEL : 1095 0)); 1096 mpa_v2_params.ord = htons(((u16)ep->ord) | (peer2peer ? 1097 (p2p_type == 1098 FW_RI_INIT_P2PTYPE_RDMA_WRITE ? 1099 MPA_V2_RDMA_WRITE_RTR : p2p_type == 1100 FW_RI_INIT_P2PTYPE_READ_REQ ? 1101 MPA_V2_RDMA_READ_RTR : 0) : 0)); 1102 memcpy(mpa->private_data, &mpa_v2_params, 1103 sizeof(struct mpa_v2_conn_params)); 1104 1105 if (ep->plen) 1106 memcpy(mpa->private_data + 1107 sizeof(struct mpa_v2_conn_params), pdata, plen); 1108 } else 1109 if (plen) 1110 memcpy(mpa->private_data, pdata, plen); 1111 1112 /* 1113 * Reference the mpa skb again. This ensures the data area 1114 * will remain in memory until the hw acks the tx. 1115 * Function fw4_ack() will deref it. 1116 */ 1117 skb_get(skb); 1118 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx); 1119 t4_set_arp_err_handler(skb, NULL, mpa_start_arp_failure); 1120 ep->mpa_skb = skb; 1121 ep->snd_seq += mpalen; 1122 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t); 1123} 1124 1125static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen) 1126{ 1127 int mpalen, wrlen; 1128 struct fw_ofld_tx_data_wr *req; 1129 struct mpa_message *mpa; 1130 struct sk_buff *skb; 1131 struct mpa_v2_conn_params mpa_v2_params; 1132 1133 pr_debug("ep %p tid %u pd_len %d\n", 1134 ep, ep->hwtid, ep->plen); 1135 1136 mpalen = sizeof(*mpa) + plen; 1137 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) 1138 mpalen += sizeof(struct mpa_v2_conn_params); 1139 wrlen = roundup(mpalen + sizeof(*req), 16); 1140 1141 skb = get_skb(NULL, wrlen, GFP_KERNEL); 1142 if (!skb) { 1143 pr_err("%s - cannot alloc skb!\n", __func__); 1144 return -ENOMEM; 1145 } 1146 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx); 1147 1148 req = skb_put_zero(skb, wrlen); 1149 req->op_to_immdlen = cpu_to_be32( 1150 FW_WR_OP_V(FW_OFLD_TX_DATA_WR) | 1151 FW_WR_COMPL_F | 1152 FW_WR_IMMDLEN_V(mpalen)); 1153 req->flowid_len16 = cpu_to_be32( 1154 FW_WR_FLOWID_V(ep->hwtid) | 1155 FW_WR_LEN16_V(wrlen >> 4)); 1156 req->plen = cpu_to_be32(mpalen); 1157 req->tunnel_to_proxy = cpu_to_be32( 1158 FW_OFLD_TX_DATA_WR_FLUSH_F | 1159 FW_OFLD_TX_DATA_WR_SHOVE_F); 1160 1161 mpa = (struct mpa_message *)(req + 1); 1162 memset(mpa, 0, sizeof(*mpa)); 1163 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key)); 1164 mpa->flags = 0; 1165 if (ep->mpa_attr.crc_enabled) 1166 mpa->flags |= MPA_CRC; 1167 if (ep->mpa_attr.recv_marker_enabled) 1168 mpa->flags |= MPA_MARKERS; 1169 mpa->revision = ep->mpa_attr.version; 1170 mpa->private_data_size = htons(plen); 1171 1172 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) { 1173 mpa->flags |= MPA_ENHANCED_RDMA_CONN; 1174 mpa->private_data_size = 1175 htons(ntohs(mpa->private_data_size) + 1176 sizeof(struct mpa_v2_conn_params)); 1177 mpa_v2_params.ird = htons((u16)ep->ird); 1178 mpa_v2_params.ord = htons((u16)ep->ord); 1179 if (peer2peer && (ep->mpa_attr.p2p_type != 1180 FW_RI_INIT_P2PTYPE_DISABLED)) { 1181 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL); 1182 1183 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE) 1184 mpa_v2_params.ord |= 1185 htons(MPA_V2_RDMA_WRITE_RTR); 1186 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ) 1187 mpa_v2_params.ord |= 1188 htons(MPA_V2_RDMA_READ_RTR); 1189 } 1190 1191 memcpy(mpa->private_data, &mpa_v2_params, 1192 sizeof(struct mpa_v2_conn_params)); 1193 1194 if (ep->plen) 1195 memcpy(mpa->private_data + 1196 sizeof(struct mpa_v2_conn_params), pdata, plen); 1197 } else 1198 if (plen) 1199 memcpy(mpa->private_data, pdata, plen); 1200 1201 /* 1202 * Reference the mpa skb. This ensures the data area 1203 * will remain in memory until the hw acks the tx. 1204 * Function fw4_ack() will deref it. 1205 */ 1206 skb_get(skb); 1207 t4_set_arp_err_handler(skb, NULL, mpa_start_arp_failure); 1208 ep->mpa_skb = skb; 1209 __state_set(&ep->com, MPA_REP_SENT); 1210 ep->snd_seq += mpalen; 1211 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t); 1212} 1213 1214static int act_establish(struct c4iw_dev *dev, struct sk_buff *skb) 1215{ 1216 struct c4iw_ep *ep; 1217 struct cpl_act_establish *req = cplhdr(skb); 1218 unsigned short tcp_opt = ntohs(req->tcp_opt); 1219 unsigned int tid = GET_TID(req); 1220 unsigned int atid = TID_TID_G(ntohl(req->tos_atid)); 1221 struct tid_info *t = dev->rdev.lldi.tids; 1222 int ret; 1223 1224 ep = lookup_atid(t, atid); 1225 1226 pr_debug("ep %p tid %u snd_isn %u rcv_isn %u\n", ep, tid, 1227 be32_to_cpu(req->snd_isn), be32_to_cpu(req->rcv_isn)); 1228 1229 mutex_lock(&ep->com.mutex); 1230 dst_confirm(ep->dst); 1231 1232 /* setup the hwtid for this connection */ 1233 ep->hwtid = tid; 1234 cxgb4_insert_tid(t, ep, tid, ep->com.local_addr.ss_family); 1235 insert_ep_tid(ep); 1236 1237 ep->snd_seq = be32_to_cpu(req->snd_isn); 1238 ep->rcv_seq = be32_to_cpu(req->rcv_isn); 1239 ep->snd_wscale = TCPOPT_SND_WSCALE_G(tcp_opt); 1240 1241 set_emss(ep, tcp_opt); 1242 1243 /* dealloc the atid */ 1244 xa_erase_irq(&ep->com.dev->atids, atid); 1245 cxgb4_free_atid(t, atid); 1246 set_bit(ACT_ESTAB, &ep->com.history); 1247 1248 /* start MPA negotiation */ 1249 ret = send_flowc(ep); 1250 if (ret) 1251 goto err; 1252 if (ep->retry_with_mpa_v1) 1253 ret = send_mpa_req(ep, skb, 1); 1254 else 1255 ret = send_mpa_req(ep, skb, mpa_rev); 1256 if (ret) 1257 goto err; 1258 mutex_unlock(&ep->com.mutex); 1259 return 0; 1260err: 1261 mutex_unlock(&ep->com.mutex); 1262 connect_reply_upcall(ep, -ENOMEM); 1263 c4iw_ep_disconnect(ep, 0, GFP_KERNEL); 1264 return 0; 1265} 1266 1267static void close_complete_upcall(struct c4iw_ep *ep, int status) 1268{ 1269 struct iw_cm_event event; 1270 1271 pr_debug("ep %p tid %u\n", ep, ep->hwtid); 1272 memset(&event, 0, sizeof(event)); 1273 event.event = IW_CM_EVENT_CLOSE; 1274 event.status = status; 1275 if (ep->com.cm_id) { 1276 pr_debug("close complete delivered ep %p cm_id %p tid %u\n", 1277 ep, ep->com.cm_id, ep->hwtid); 1278 ep->com.cm_id->event_handler(ep->com.cm_id, &event); 1279 deref_cm_id(&ep->com); 1280 set_bit(CLOSE_UPCALL, &ep->com.history); 1281 } 1282} 1283 1284static void peer_close_upcall(struct c4iw_ep *ep) 1285{ 1286 struct iw_cm_event event; 1287 1288 pr_debug("ep %p tid %u\n", ep, ep->hwtid); 1289 memset(&event, 0, sizeof(event)); 1290 event.event = IW_CM_EVENT_DISCONNECT; 1291 if (ep->com.cm_id) { 1292 pr_debug("peer close delivered ep %p cm_id %p tid %u\n", 1293 ep, ep->com.cm_id, ep->hwtid); 1294 ep->com.cm_id->event_handler(ep->com.cm_id, &event); 1295 set_bit(DISCONN_UPCALL, &ep->com.history); 1296 } 1297} 1298 1299static void peer_abort_upcall(struct c4iw_ep *ep) 1300{ 1301 struct iw_cm_event event; 1302 1303 pr_debug("ep %p tid %u\n", ep, ep->hwtid); 1304 memset(&event, 0, sizeof(event)); 1305 event.event = IW_CM_EVENT_CLOSE; 1306 event.status = -ECONNRESET; 1307 if (ep->com.cm_id) { 1308 pr_debug("abort delivered ep %p cm_id %p tid %u\n", ep, 1309 ep->com.cm_id, ep->hwtid); 1310 ep->com.cm_id->event_handler(ep->com.cm_id, &event); 1311 deref_cm_id(&ep->com); 1312 set_bit(ABORT_UPCALL, &ep->com.history); 1313 } 1314} 1315 1316static void connect_reply_upcall(struct c4iw_ep *ep, int status) 1317{ 1318 struct iw_cm_event event; 1319 1320 pr_debug("ep %p tid %u status %d\n", 1321 ep, ep->hwtid, status); 1322 memset(&event, 0, sizeof(event)); 1323 event.event = IW_CM_EVENT_CONNECT_REPLY; 1324 event.status = status; 1325 memcpy(&event.local_addr, &ep->com.local_addr, 1326 sizeof(ep->com.local_addr)); 1327 memcpy(&event.remote_addr, &ep->com.remote_addr, 1328 sizeof(ep->com.remote_addr)); 1329 1330 if ((status == 0) || (status == -ECONNREFUSED)) { 1331 if (!ep->tried_with_mpa_v1) { 1332 /* this means MPA_v2 is used */ 1333 event.ord = ep->ird; 1334 event.ird = ep->ord; 1335 event.private_data_len = ep->plen - 1336 sizeof(struct mpa_v2_conn_params); 1337 event.private_data = ep->mpa_pkt + 1338 sizeof(struct mpa_message) + 1339 sizeof(struct mpa_v2_conn_params); 1340 } else { 1341 /* this means MPA_v1 is used */ 1342 event.ord = cur_max_read_depth(ep->com.dev); 1343 event.ird = cur_max_read_depth(ep->com.dev); 1344 event.private_data_len = ep->plen; 1345 event.private_data = ep->mpa_pkt + 1346 sizeof(struct mpa_message); 1347 } 1348 } 1349 1350 pr_debug("ep %p tid %u status %d\n", ep, 1351 ep->hwtid, status); 1352 set_bit(CONN_RPL_UPCALL, &ep->com.history); 1353 ep->com.cm_id->event_handler(ep->com.cm_id, &event); 1354 1355 if (status < 0) 1356 deref_cm_id(&ep->com); 1357} 1358 1359static int connect_request_upcall(struct c4iw_ep *ep) 1360{ 1361 struct iw_cm_event event; 1362 int ret; 1363 1364 pr_debug("ep %p tid %u\n", ep, ep->hwtid); 1365 memset(&event, 0, sizeof(event)); 1366 event.event = IW_CM_EVENT_CONNECT_REQUEST; 1367 memcpy(&event.local_addr, &ep->com.local_addr, 1368 sizeof(ep->com.local_addr)); 1369 memcpy(&event.remote_addr, &ep->com.remote_addr, 1370 sizeof(ep->com.remote_addr)); 1371 event.provider_data = ep; 1372 if (!ep->tried_with_mpa_v1) { 1373 /* this means MPA_v2 is used */ 1374 event.ord = ep->ord; 1375 event.ird = ep->ird; 1376 event.private_data_len = ep->plen - 1377 sizeof(struct mpa_v2_conn_params); 1378 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message) + 1379 sizeof(struct mpa_v2_conn_params); 1380 } else { 1381 /* this means MPA_v1 is used. Send max supported */ 1382 event.ord = cur_max_read_depth(ep->com.dev); 1383 event.ird = cur_max_read_depth(ep->com.dev); 1384 event.private_data_len = ep->plen; 1385 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message); 1386 } 1387 c4iw_get_ep(&ep->com); 1388 ret = ep->parent_ep->com.cm_id->event_handler(ep->parent_ep->com.cm_id, 1389 &event); 1390 if (ret) 1391 c4iw_put_ep(&ep->com); 1392 set_bit(CONNREQ_UPCALL, &ep->com.history); 1393 c4iw_put_ep(&ep->parent_ep->com); 1394 return ret; 1395} 1396 1397static void established_upcall(struct c4iw_ep *ep) 1398{ 1399 struct iw_cm_event event; 1400 1401 pr_debug("ep %p tid %u\n", ep, ep->hwtid); 1402 memset(&event, 0, sizeof(event)); 1403 event.event = IW_CM_EVENT_ESTABLISHED; 1404 event.ird = ep->ord; 1405 event.ord = ep->ird; 1406 if (ep->com.cm_id) { 1407 pr_debug("ep %p tid %u\n", ep, ep->hwtid); 1408 ep->com.cm_id->event_handler(ep->com.cm_id, &event); 1409 set_bit(ESTAB_UPCALL, &ep->com.history); 1410 } 1411} 1412 1413static int update_rx_credits(struct c4iw_ep *ep, u32 credits) 1414{ 1415 struct sk_buff *skb; 1416 u32 wrlen = roundup(sizeof(struct cpl_rx_data_ack), 16); 1417 u32 credit_dack; 1418 1419 pr_debug("ep %p tid %u credits %u\n", 1420 ep, ep->hwtid, credits); 1421 skb = get_skb(NULL, wrlen, GFP_KERNEL); 1422 if (!skb) { 1423 pr_err("update_rx_credits - cannot alloc skb!\n"); 1424 return 0; 1425 } 1426 1427 /* 1428 * If we couldn't specify the entire rcv window at connection setup 1429 * due to the limit in the number of bits in the RCV_BUFSIZ field, 1430 * then add the overage in to the credits returned. 1431 */ 1432 if (ep->rcv_win > RCV_BUFSIZ_M * 1024) 1433 credits += ep->rcv_win - RCV_BUFSIZ_M * 1024; 1434 1435 credit_dack = credits | RX_FORCE_ACK_F | RX_DACK_CHANGE_F | 1436 RX_DACK_MODE_V(dack_mode); 1437 1438 cxgb_mk_rx_data_ack(skb, wrlen, ep->hwtid, ep->ctrlq_idx, 1439 credit_dack); 1440 1441 c4iw_ofld_send(&ep->com.dev->rdev, skb); 1442 return credits; 1443} 1444 1445#define RELAXED_IRD_NEGOTIATION 1 1446 1447/* 1448 * process_mpa_reply - process streaming mode MPA reply 1449 * 1450 * Returns: 1451 * 1452 * 0 upon success indicating a connect request was delivered to the ULP 1453 * or the mpa request is incomplete but valid so far. 1454 * 1455 * 1 if a failure requires the caller to close the connection. 1456 * 1457 * 2 if a failure requires the caller to abort the connection. 1458 */ 1459static int process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb) 1460{ 1461 struct mpa_message *mpa; 1462 struct mpa_v2_conn_params *mpa_v2_params; 1463 u16 plen; 1464 u16 resp_ird, resp_ord; 1465 u8 rtr_mismatch = 0, insuff_ird = 0; 1466 struct c4iw_qp_attributes attrs; 1467 enum c4iw_qp_attr_mask mask; 1468 int err; 1469 int disconnect = 0; 1470 1471 pr_debug("ep %p tid %u\n", ep, ep->hwtid); 1472 1473 /* 1474 * If we get more than the supported amount of private data 1475 * then we must fail this connection. 1476 */ 1477 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) { 1478 err = -EINVAL; 1479 goto err_stop_timer; 1480 } 1481 1482 /* 1483 * copy the new data into our accumulation buffer. 1484 */ 1485 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]), 1486 skb->len); 1487 ep->mpa_pkt_len += skb->len; 1488 1489 /* 1490 * if we don't even have the mpa message, then bail. 1491 */ 1492 if (ep->mpa_pkt_len < sizeof(*mpa)) 1493 return 0; 1494 mpa = (struct mpa_message *) ep->mpa_pkt; 1495 1496 /* Validate MPA header. */ 1497 if (mpa->revision > mpa_rev) { 1498 pr_err("%s MPA version mismatch. Local = %d, Received = %d\n", 1499 __func__, mpa_rev, mpa->revision); 1500 err = -EPROTO; 1501 goto err_stop_timer; 1502 } 1503 if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) { 1504 err = -EPROTO; 1505 goto err_stop_timer; 1506 } 1507 1508 plen = ntohs(mpa->private_data_size); 1509 1510 /* 1511 * Fail if there's too much private data. 1512 */ 1513 if (plen > MPA_MAX_PRIVATE_DATA) { 1514 err = -EPROTO; 1515 goto err_stop_timer; 1516 } 1517 1518 /* 1519 * If plen does not account for pkt size 1520 */ 1521 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) { 1522 err = -EPROTO; 1523 goto err_stop_timer; 1524 } 1525 1526 ep->plen = (u8) plen; 1527 1528 /* 1529 * If we don't have all the pdata yet, then bail. 1530 * We'll continue process when more data arrives. 1531 */ 1532 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen)) 1533 return 0; 1534 1535 if (mpa->flags & MPA_REJECT) { 1536 err = -ECONNREFUSED; 1537 goto err_stop_timer; 1538 } 1539 1540 /* 1541 * Stop mpa timer. If it expired, then 1542 * we ignore the MPA reply. process_timeout() 1543 * will abort the connection. 1544 */ 1545 if (stop_ep_timer(ep)) 1546 return 0; 1547 1548 /* 1549 * If we get here we have accumulated the entire mpa 1550 * start reply message including private data. And 1551 * the MPA header is valid. 1552 */ 1553 __state_set(&ep->com, FPDU_MODE); 1554 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0; 1555 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0; 1556 ep->mpa_attr.version = mpa->revision; 1557 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED; 1558 1559 if (mpa->revision == 2) { 1560 ep->mpa_attr.enhanced_rdma_conn = 1561 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0; 1562 if (ep->mpa_attr.enhanced_rdma_conn) { 1563 mpa_v2_params = (struct mpa_v2_conn_params *) 1564 (ep->mpa_pkt + sizeof(*mpa)); 1565 resp_ird = ntohs(mpa_v2_params->ird) & 1566 MPA_V2_IRD_ORD_MASK; 1567 resp_ord = ntohs(mpa_v2_params->ord) & 1568 MPA_V2_IRD_ORD_MASK; 1569 pr_debug("responder ird %u ord %u ep ird %u ord %u\n", 1570 resp_ird, resp_ord, ep->ird, ep->ord); 1571 1572 /* 1573 * This is a double-check. Ideally, below checks are 1574 * not required since ird/ord stuff has been taken 1575 * care of in c4iw_accept_cr 1576 */ 1577 if (ep->ird < resp_ord) { 1578 if (RELAXED_IRD_NEGOTIATION && resp_ord <= 1579 ep->com.dev->rdev.lldi.max_ordird_qp) 1580 ep->ird = resp_ord; 1581 else 1582 insuff_ird = 1; 1583 } else if (ep->ird > resp_ord) { 1584 ep->ird = resp_ord; 1585 } 1586 if (ep->ord > resp_ird) { 1587 if (RELAXED_IRD_NEGOTIATION) 1588 ep->ord = resp_ird; 1589 else 1590 insuff_ird = 1; 1591 } 1592 if (insuff_ird) { 1593 err = -ENOMEM; 1594 ep->ird = resp_ord; 1595 ep->ord = resp_ird; 1596 } 1597 1598 if (ntohs(mpa_v2_params->ird) & 1599 MPA_V2_PEER2PEER_MODEL) { 1600 if (ntohs(mpa_v2_params->ord) & 1601 MPA_V2_RDMA_WRITE_RTR) 1602 ep->mpa_attr.p2p_type = 1603 FW_RI_INIT_P2PTYPE_RDMA_WRITE; 1604 else if (ntohs(mpa_v2_params->ord) & 1605 MPA_V2_RDMA_READ_RTR) 1606 ep->mpa_attr.p2p_type = 1607 FW_RI_INIT_P2PTYPE_READ_REQ; 1608 } 1609 } 1610 } else if (mpa->revision == 1) 1611 if (peer2peer) 1612 ep->mpa_attr.p2p_type = p2p_type; 1613 1614 pr_debug("crc_enabled=%d, recv_marker_enabled=%d, xmit_marker_enabled=%d, version=%d p2p_type=%d local-p2p_type = %d\n", 1615 ep->mpa_attr.crc_enabled, 1616 ep->mpa_attr.recv_marker_enabled, 1617 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version, 1618 ep->mpa_attr.p2p_type, p2p_type); 1619 1620 /* 1621 * If responder's RTR does not match with that of initiator, assign 1622 * FW_RI_INIT_P2PTYPE_DISABLED in mpa attributes so that RTR is not 1623 * generated when moving QP to RTS state. 1624 * A TERM message will be sent after QP has moved to RTS state 1625 */ 1626 if ((ep->mpa_attr.version == 2) && peer2peer && 1627 (ep->mpa_attr.p2p_type != p2p_type)) { 1628 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED; 1629 rtr_mismatch = 1; 1630 } 1631 1632 attrs.mpa_attr = ep->mpa_attr; 1633 attrs.max_ird = ep->ird; 1634 attrs.max_ord = ep->ord; 1635 attrs.llp_stream_handle = ep; 1636 attrs.next_state = C4IW_QP_STATE_RTS; 1637 1638 mask = C4IW_QP_ATTR_NEXT_STATE | 1639 C4IW_QP_ATTR_LLP_STREAM_HANDLE | C4IW_QP_ATTR_MPA_ATTR | 1640 C4IW_QP_ATTR_MAX_IRD | C4IW_QP_ATTR_MAX_ORD; 1641 1642 /* bind QP and TID with INIT_WR */ 1643 err = c4iw_modify_qp(ep->com.qp->rhp, 1644 ep->com.qp, mask, &attrs, 1); 1645 if (err) 1646 goto err; 1647 1648 /* 1649 * If responder's RTR requirement did not match with what initiator 1650 * supports, generate TERM message 1651 */ 1652 if (rtr_mismatch) { 1653 pr_err("%s: RTR mismatch, sending TERM\n", __func__); 1654 attrs.layer_etype = LAYER_MPA | DDP_LLP; 1655 attrs.ecode = MPA_NOMATCH_RTR; 1656 attrs.next_state = C4IW_QP_STATE_TERMINATE; 1657 attrs.send_term = 1; 1658 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp, 1659 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1); 1660 err = -ENOMEM; 1661 disconnect = 1; 1662 goto out; 1663 } 1664 1665 /* 1666 * Generate TERM if initiator IRD is not sufficient for responder 1667 * provided ORD. Currently, we do the same behaviour even when 1668 * responder provided IRD is also not sufficient as regards to 1669 * initiator ORD. 1670 */ 1671 if (insuff_ird) { 1672 pr_err("%s: Insufficient IRD, sending TERM\n", __func__); 1673 attrs.layer_etype = LAYER_MPA | DDP_LLP; 1674 attrs.ecode = MPA_INSUFF_IRD; 1675 attrs.next_state = C4IW_QP_STATE_TERMINATE; 1676 attrs.send_term = 1; 1677 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp, 1678 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1); 1679 err = -ENOMEM; 1680 disconnect = 1; 1681 goto out; 1682 } 1683 goto out; 1684err_stop_timer: 1685 stop_ep_timer(ep); 1686err: 1687 disconnect = 2; 1688out: 1689 connect_reply_upcall(ep, err); 1690 return disconnect; 1691} 1692 1693/* 1694 * process_mpa_request - process streaming mode MPA request 1695 * 1696 * Returns: 1697 * 1698 * 0 upon success indicating a connect request was delivered to the ULP 1699 * or the mpa request is incomplete but valid so far. 1700 * 1701 * 1 if a failure requires the caller to close the connection. 1702 * 1703 * 2 if a failure requires the caller to abort the connection. 1704 */ 1705static int process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb) 1706{ 1707 struct mpa_message *mpa; 1708 struct mpa_v2_conn_params *mpa_v2_params; 1709 u16 plen; 1710 1711 pr_debug("ep %p tid %u\n", ep, ep->hwtid); 1712 1713 /* 1714 * If we get more than the supported amount of private data 1715 * then we must fail this connection. 1716 */ 1717 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) 1718 goto err_stop_timer; 1719 1720 pr_debug("enter (%s line %u)\n", __FILE__, __LINE__); 1721 1722 /* 1723 * Copy the new data into our accumulation buffer. 1724 */ 1725 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]), 1726 skb->len); 1727 ep->mpa_pkt_len += skb->len; 1728 1729 /* 1730 * If we don't even have the mpa message, then bail. 1731 * We'll continue process when more data arrives. 1732 */ 1733 if (ep->mpa_pkt_len < sizeof(*mpa)) 1734 return 0; 1735 1736 pr_debug("enter (%s line %u)\n", __FILE__, __LINE__); 1737 mpa = (struct mpa_message *) ep->mpa_pkt; 1738 1739 /* 1740 * Validate MPA Header. 1741 */ 1742 if (mpa->revision > mpa_rev) { 1743 pr_err("%s MPA version mismatch. Local = %d, Received = %d\n", 1744 __func__, mpa_rev, mpa->revision); 1745 goto err_stop_timer; 1746 } 1747 1748 if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key))) 1749 goto err_stop_timer; 1750 1751 plen = ntohs(mpa->private_data_size); 1752 1753 /* 1754 * Fail if there's too much private data. 1755 */ 1756 if (plen > MPA_MAX_PRIVATE_DATA) 1757 goto err_stop_timer; 1758 1759 /* 1760 * If plen does not account for pkt size 1761 */ 1762 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) 1763 goto err_stop_timer; 1764 ep->plen = (u8) plen; 1765 1766 /* 1767 * If we don't have all the pdata yet, then bail. 1768 */ 1769 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen)) 1770 return 0; 1771 1772 /* 1773 * If we get here we have accumulated the entire mpa 1774 * start reply message including private data. 1775 */ 1776 ep->mpa_attr.initiator = 0; 1777 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0; 1778 ep->mpa_attr.recv_marker_enabled = markers_enabled; 1779 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0; 1780 ep->mpa_attr.version = mpa->revision; 1781 if (mpa->revision == 1) 1782 ep->tried_with_mpa_v1 = 1; 1783 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED; 1784 1785 if (mpa->revision == 2) { 1786 ep->mpa_attr.enhanced_rdma_conn = 1787 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0; 1788 if (ep->mpa_attr.enhanced_rdma_conn) { 1789 mpa_v2_params = (struct mpa_v2_conn_params *) 1790 (ep->mpa_pkt + sizeof(*mpa)); 1791 ep->ird = ntohs(mpa_v2_params->ird) & 1792 MPA_V2_IRD_ORD_MASK; 1793 ep->ird = min_t(u32, ep->ird, 1794 cur_max_read_depth(ep->com.dev)); 1795 ep->ord = ntohs(mpa_v2_params->ord) & 1796 MPA_V2_IRD_ORD_MASK; 1797 ep->ord = min_t(u32, ep->ord, 1798 cur_max_read_depth(ep->com.dev)); 1799 pr_debug("initiator ird %u ord %u\n", 1800 ep->ird, ep->ord); 1801 if (ntohs(mpa_v2_params->ird) & MPA_V2_PEER2PEER_MODEL) 1802 if (peer2peer) { 1803 if (ntohs(mpa_v2_params->ord) & 1804 MPA_V2_RDMA_WRITE_RTR) 1805 ep->mpa_attr.p2p_type = 1806 FW_RI_INIT_P2PTYPE_RDMA_WRITE; 1807 else if (ntohs(mpa_v2_params->ord) & 1808 MPA_V2_RDMA_READ_RTR) 1809 ep->mpa_attr.p2p_type = 1810 FW_RI_INIT_P2PTYPE_READ_REQ; 1811 } 1812 } 1813 } else if (mpa->revision == 1) 1814 if (peer2peer) 1815 ep->mpa_attr.p2p_type = p2p_type; 1816 1817 pr_debug("crc_enabled=%d, recv_marker_enabled=%d, xmit_marker_enabled=%d, version=%d p2p_type=%d\n", 1818 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled, 1819 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version, 1820 ep->mpa_attr.p2p_type); 1821 1822 __state_set(&ep->com, MPA_REQ_RCVD); 1823 1824 /* drive upcall */ 1825 mutex_lock_nested(&ep->parent_ep->com.mutex, SINGLE_DEPTH_NESTING); 1826 if (ep->parent_ep->com.state != DEAD) { 1827 if (connect_request_upcall(ep)) 1828 goto err_unlock_parent; 1829 } else { 1830 goto err_unlock_parent; 1831 } 1832 mutex_unlock(&ep->parent_ep->com.mutex); 1833 return 0; 1834 1835err_unlock_parent: 1836 mutex_unlock(&ep->parent_ep->com.mutex); 1837 goto err_out; 1838err_stop_timer: 1839 (void)stop_ep_timer(ep); 1840err_out: 1841 return 2; 1842} 1843 1844static int rx_data(struct c4iw_dev *dev, struct sk_buff *skb) 1845{ 1846 struct c4iw_ep *ep; 1847 struct cpl_rx_data *hdr = cplhdr(skb); 1848 unsigned int dlen = ntohs(hdr->len); 1849 unsigned int tid = GET_TID(hdr); 1850 __u8 status = hdr->status; 1851 int disconnect = 0; 1852 1853 ep = get_ep_from_tid(dev, tid); 1854 if (!ep) 1855 return 0; 1856 pr_debug("ep %p tid %u dlen %u\n", ep, ep->hwtid, dlen); 1857 skb_pull(skb, sizeof(*hdr)); 1858 skb_trim(skb, dlen); 1859 mutex_lock(&ep->com.mutex); 1860 1861 switch (ep->com.state) { 1862 case MPA_REQ_SENT: 1863 update_rx_credits(ep, dlen); 1864 ep->rcv_seq += dlen; 1865 disconnect = process_mpa_reply(ep, skb); 1866 break; 1867 case MPA_REQ_WAIT: 1868 update_rx_credits(ep, dlen); 1869 ep->rcv_seq += dlen; 1870 disconnect = process_mpa_request(ep, skb); 1871 break; 1872 case FPDU_MODE: { 1873 struct c4iw_qp_attributes attrs; 1874 1875 update_rx_credits(ep, dlen); 1876 if (status) 1877 pr_err("%s Unexpected streaming data." \ 1878 " qpid %u ep %p state %d tid %u status %d\n", 1879 __func__, ep->com.qp->wq.sq.qid, ep, 1880 ep->com.state, ep->hwtid, status); 1881 attrs.next_state = C4IW_QP_STATE_TERMINATE; 1882 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp, 1883 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1); 1884 disconnect = 1; 1885 break; 1886 } 1887 default: 1888 break; 1889 } 1890 mutex_unlock(&ep->com.mutex); 1891 if (disconnect) 1892 c4iw_ep_disconnect(ep, disconnect == 2, GFP_KERNEL); 1893 c4iw_put_ep(&ep->com); 1894 return 0; 1895} 1896 1897static void complete_cached_srq_buffers(struct c4iw_ep *ep, u32 srqidx) 1898{ 1899 enum chip_type adapter_type; 1900 1901 adapter_type = ep->com.dev->rdev.lldi.adapter_type; 1902 1903 /* 1904 * If this TCB had a srq buffer cached, then we must complete 1905 * it. For user mode, that means saving the srqidx in the 1906 * user/kernel status page for this qp. For kernel mode, just 1907 * synthesize the CQE now. 1908 */ 1909 if (CHELSIO_CHIP_VERSION(adapter_type) > CHELSIO_T5 && srqidx) { 1910 if (ep->com.qp->ibqp.uobject) 1911 t4_set_wq_in_error(&ep->com.qp->wq, srqidx); 1912 else 1913 c4iw_flush_srqidx(ep->com.qp, srqidx); 1914 } 1915} 1916 1917static int abort_rpl(struct c4iw_dev *dev, struct sk_buff *skb) 1918{ 1919 u32 srqidx; 1920 struct c4iw_ep *ep; 1921 struct cpl_abort_rpl_rss6 *rpl = cplhdr(skb); 1922 int release = 0; 1923 unsigned int tid = GET_TID(rpl); 1924 1925 ep = get_ep_from_tid(dev, tid); 1926 if (!ep) { 1927 pr_warn("Abort rpl to freed endpoint\n"); 1928 return 0; 1929 } 1930 1931 if (ep->com.qp && ep->com.qp->srq) { 1932 srqidx = ABORT_RSS_SRQIDX_G(be32_to_cpu(rpl->srqidx_status)); 1933 complete_cached_srq_buffers(ep, srqidx ? srqidx : ep->srqe_idx); 1934 } 1935 1936 pr_debug("ep %p tid %u\n", ep, ep->hwtid); 1937 mutex_lock(&ep->com.mutex); 1938 switch (ep->com.state) { 1939 case ABORTING: 1940 c4iw_wake_up_noref(ep->com.wr_waitp, -ECONNRESET); 1941 __state_set(&ep->com, DEAD); 1942 release = 1; 1943 break; 1944 default: 1945 pr_err("%s ep %p state %d\n", __func__, ep, ep->com.state); 1946 break; 1947 } 1948 mutex_unlock(&ep->com.mutex); 1949 1950 if (release) { 1951 close_complete_upcall(ep, -ECONNRESET); 1952 release_ep_resources(ep); 1953 } 1954 c4iw_put_ep(&ep->com); 1955 return 0; 1956} 1957 1958static int send_fw_act_open_req(struct c4iw_ep *ep, unsigned int atid) 1959{ 1960 struct sk_buff *skb; 1961 struct fw_ofld_connection_wr *req; 1962 unsigned int mtu_idx; 1963 u32 wscale; 1964 struct sockaddr_in *sin; 1965 int win; 1966 1967 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); 1968 if (!skb) 1969 return -ENOMEM; 1970 1971 req = __skb_put_zero(skb, sizeof(*req)); 1972 req->op_compl = htonl(WR_OP_V(FW_OFLD_CONNECTION_WR)); 1973 req->len16_pkd = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*req), 16))); 1974 req->le.filter = cpu_to_be32(cxgb4_select_ntuple( 1975 ep->com.dev->rdev.lldi.ports[0], 1976 ep->l2t)); 1977 sin = (struct sockaddr_in *)&ep->com.local_addr; 1978 req->le.lport = sin->sin_port; 1979 req->le.u.ipv4.lip = sin->sin_addr.s_addr; 1980 sin = (struct sockaddr_in *)&ep->com.remote_addr; 1981 req->le.pport = sin->sin_port; 1982 req->le.u.ipv4.pip = sin->sin_addr.s_addr; 1983 req->tcb.t_state_to_astid = 1984 htonl(FW_OFLD_CONNECTION_WR_T_STATE_V(TCP_SYN_SENT) | 1985 FW_OFLD_CONNECTION_WR_ASTID_V(atid)); 1986 req->tcb.cplrxdataack_cplpassacceptrpl = 1987 htons(FW_OFLD_CONNECTION_WR_CPLRXDATAACK_F); 1988 req->tcb.tx_max = (__force __be32) jiffies; 1989 req->tcb.rcv_adv = htons(1); 1990 cxgb_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx, 1991 enable_tcp_timestamps, 1992 (ep->com.remote_addr.ss_family == AF_INET) ? 0 : 1); 1993 wscale = cxgb_compute_wscale(rcv_win); 1994 1995 /* 1996 * Specify the largest window that will fit in opt0. The 1997 * remainder will be specified in the rx_data_ack. 1998 */ 1999 win = ep->rcv_win >> 10; 2000 if (win > RCV_BUFSIZ_M) 2001 win = RCV_BUFSIZ_M; 2002 2003 req->tcb.opt0 = (__force __be64) (TCAM_BYPASS_F | 2004 (nocong ? NO_CONG_F : 0) | 2005 KEEP_ALIVE_F | 2006 DELACK_F | 2007 WND_SCALE_V(wscale) | 2008 MSS_IDX_V(mtu_idx) | 2009 L2T_IDX_V(ep->l2t->idx) | 2010 TX_CHAN_V(ep->tx_chan) | 2011 SMAC_SEL_V(ep->smac_idx) | 2012 DSCP_V(ep->tos >> 2) | 2013 ULP_MODE_V(ULP_MODE_TCPDDP) | 2014 RCV_BUFSIZ_V(win)); 2015 req->tcb.opt2 = (__force __be32) (PACE_V(1) | 2016 TX_QUEUE_V(ep->com.dev->rdev.lldi.tx_modq[ep->tx_chan]) | 2017 RX_CHANNEL_V(0) | 2018 CCTRL_ECN_V(enable_ecn) | 2019 RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid)); 2020 if (enable_tcp_timestamps) 2021 req->tcb.opt2 |= (__force __be32)TSTAMPS_EN_F; 2022 if (enable_tcp_sack) 2023 req->tcb.opt2 |= (__force __be32)SACK_EN_F; 2024 if (wscale && enable_tcp_window_scaling) 2025 req->tcb.opt2 |= (__force __be32)WND_SCALE_EN_F; 2026 req->tcb.opt0 = cpu_to_be64((__force u64)req->tcb.opt0); 2027 req->tcb.opt2 = cpu_to_be32((__force u32)req->tcb.opt2); 2028 set_wr_txq(skb, CPL_PRIORITY_CONTROL, ep->ctrlq_idx); 2029 set_bit(ACT_OFLD_CONN, &ep->com.history); 2030 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t); 2031} 2032 2033/* 2034 * Some of the error codes above implicitly indicate that there is no TID 2035 * allocated with the result of an ACT_OPEN. We use this predicate to make 2036 * that explicit. 2037 */ 2038static inline int act_open_has_tid(int status) 2039{ 2040 return (status != CPL_ERR_TCAM_PARITY && 2041 status != CPL_ERR_TCAM_MISS && 2042 status != CPL_ERR_TCAM_FULL && 2043 status != CPL_ERR_CONN_EXIST_SYNRECV && 2044 status != CPL_ERR_CONN_EXIST); 2045} 2046 2047static char *neg_adv_str(unsigned int status) 2048{ 2049 switch (status) { 2050 case CPL_ERR_RTX_NEG_ADVICE: 2051 return "Retransmit timeout"; 2052 case CPL_ERR_PERSIST_NEG_ADVICE: 2053 return "Persist timeout"; 2054 case CPL_ERR_KEEPALV_NEG_ADVICE: 2055 return "Keepalive timeout"; 2056 default: 2057 return "Unknown"; 2058 } 2059} 2060 2061static void set_tcp_window(struct c4iw_ep *ep, struct port_info *pi) 2062{ 2063 ep->snd_win = snd_win; 2064 ep->rcv_win = rcv_win; 2065 pr_debug("snd_win %d rcv_win %d\n", 2066 ep->snd_win, ep->rcv_win); 2067} 2068 2069#define ACT_OPEN_RETRY_COUNT 2 2070 2071static int import_ep(struct c4iw_ep *ep, int iptype, __u8 *peer_ip, 2072 struct dst_entry *dst, struct c4iw_dev *cdev, 2073 bool clear_mpa_v1, enum chip_type adapter_type, u8 tos) 2074{ 2075 struct neighbour *n; 2076 int err, step; 2077 struct net_device *pdev; 2078 2079 n = dst_neigh_lookup(dst, peer_ip); 2080 if (!n) 2081 return -ENODEV; 2082 2083 rcu_read_lock(); 2084 err = -ENOMEM; 2085 if (n->dev->flags & IFF_LOOPBACK) { 2086 if (iptype == 4) 2087 pdev = ip_dev_find(&init_net, *(__be32 *)peer_ip); 2088 else if (IS_ENABLED(CONFIG_IPV6)) 2089 for_each_netdev(&init_net, pdev) { 2090 if (ipv6_chk_addr(&init_net, 2091 (struct in6_addr *)peer_ip, 2092 pdev, 1)) 2093 break; 2094 } 2095 else 2096 pdev = NULL; 2097 2098 if (!pdev) { 2099 err = -ENODEV; 2100 goto out; 2101 } 2102 ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t, 2103 n, pdev, rt_tos2priority(tos)); 2104 if (!ep->l2t) { 2105 dev_put(pdev); 2106 goto out; 2107 } 2108 ep->mtu = pdev->mtu; 2109 ep->tx_chan = cxgb4_port_chan(pdev); 2110 ep->smac_idx = ((struct port_info *)netdev_priv(pdev))->smt_idx; 2111 step = cdev->rdev.lldi.ntxq / 2112 cdev->rdev.lldi.nchan; 2113 ep->txq_idx = cxgb4_port_idx(pdev) * step; 2114 step = cdev->rdev.lldi.nrxq / 2115 cdev->rdev.lldi.nchan; 2116 ep->ctrlq_idx = cxgb4_port_idx(pdev); 2117 ep->rss_qid = cdev->rdev.lldi.rxq_ids[ 2118 cxgb4_port_idx(pdev) * step]; 2119 set_tcp_window(ep, (struct port_info *)netdev_priv(pdev)); 2120 dev_put(pdev); 2121 } else { 2122 pdev = get_real_dev(n->dev); 2123 ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t, 2124 n, pdev, rt_tos2priority(tos)); 2125 if (!ep->l2t) 2126 goto out; 2127 ep->mtu = dst_mtu(dst); 2128 ep->tx_chan = cxgb4_port_chan(pdev); 2129 ep->smac_idx = ((struct port_info *)netdev_priv(pdev))->smt_idx; 2130 step = cdev->rdev.lldi.ntxq / 2131 cdev->rdev.lldi.nchan; 2132 ep->txq_idx = cxgb4_port_idx(pdev) * step; 2133 ep->ctrlq_idx = cxgb4_port_idx(pdev); 2134 step = cdev->rdev.lldi.nrxq / 2135 cdev->rdev.lldi.nchan; 2136 ep->rss_qid = cdev->rdev.lldi.rxq_ids[ 2137 cxgb4_port_idx(pdev) * step]; 2138 set_tcp_window(ep, (struct port_info *)netdev_priv(pdev)); 2139 2140 if (clear_mpa_v1) { 2141 ep->retry_with_mpa_v1 = 0; 2142 ep->tried_with_mpa_v1 = 0; 2143 } 2144 } 2145 err = 0; 2146out: 2147 rcu_read_unlock(); 2148 2149 neigh_release(n); 2150 2151 return err; 2152} 2153 2154static int c4iw_reconnect(struct c4iw_ep *ep) 2155{ 2156 int err = 0; 2157 int size = 0; 2158 struct sockaddr_in *laddr = (struct sockaddr_in *) 2159 &ep->com.cm_id->m_local_addr; 2160 struct sockaddr_in *raddr = (struct sockaddr_in *) 2161 &ep->com.cm_id->m_remote_addr; 2162 struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *) 2163 &ep->com.cm_id->m_local_addr; 2164 struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *) 2165 &ep->com.cm_id->m_remote_addr; 2166 int iptype; 2167 __u8 *ra; 2168 2169 pr_debug("qp %p cm_id %p\n", ep->com.qp, ep->com.cm_id); 2170 c4iw_init_wr_wait(ep->com.wr_waitp); 2171 2172 /* When MPA revision is different on nodes, the node with MPA_rev=2 2173 * tries to reconnect with MPA_rev 1 for the same EP through 2174 * c4iw_reconnect(), where the same EP is assigned with new tid for 2175 * further connection establishment. As we are using the same EP pointer 2176 * for reconnect, few skbs are used during the previous c4iw_connect(), 2177 * which leaves the EP with inadequate skbs for further 2178 * c4iw_reconnect(), Further causing a crash due to an empty 2179 * skb_list() during peer_abort(). Allocate skbs which is already used. 2180 */ 2181 size = (CN_MAX_CON_BUF - skb_queue_len(&ep->com.ep_skb_list)); 2182 if (alloc_ep_skb_list(&ep->com.ep_skb_list, size)) { 2183 err = -ENOMEM; 2184 goto fail1; 2185 } 2186 2187 /* 2188 * Allocate an active TID to initiate a TCP connection. 2189 */ 2190 ep->atid = cxgb4_alloc_atid(ep->com.dev->rdev.lldi.tids, ep); 2191 if (ep->atid == -1) { 2192 pr_err("%s - cannot alloc atid\n", __func__); 2193 err = -ENOMEM; 2194 goto fail2; 2195 } 2196 err = xa_insert_irq(&ep->com.dev->atids, ep->atid, ep, GFP_KERNEL); 2197 if (err) 2198 goto fail2a; 2199 2200 /* find a route */ 2201 if (ep->com.cm_id->m_local_addr.ss_family == AF_INET) { 2202 ep->dst = cxgb_find_route(&ep->com.dev->rdev.lldi, get_real_dev, 2203 laddr->sin_addr.s_addr, 2204 raddr->sin_addr.s_addr, 2205 laddr->sin_port, 2206 raddr->sin_port, ep->com.cm_id->tos); 2207 iptype = 4; 2208 ra = (__u8 *)&raddr->sin_addr; 2209 } else { 2210 ep->dst = cxgb_find_route6(&ep->com.dev->rdev.lldi, 2211 get_real_dev, 2212 laddr6->sin6_addr.s6_addr, 2213 raddr6->sin6_addr.s6_addr, 2214 laddr6->sin6_port, 2215 raddr6->sin6_port, 2216 ep->com.cm_id->tos, 2217 raddr6->sin6_scope_id); 2218 iptype = 6; 2219 ra = (__u8 *)&raddr6->sin6_addr; 2220 } 2221 if (!ep->dst) { 2222 pr_err("%s - cannot find route\n", __func__); 2223 err = -EHOSTUNREACH; 2224 goto fail3; 2225 } 2226 err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, false, 2227 ep->com.dev->rdev.lldi.adapter_type, 2228 ep->com.cm_id->tos); 2229 if (err) { 2230 pr_err("%s - cannot alloc l2e\n", __func__); 2231 goto fail4; 2232 } 2233 2234 pr_debug("txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n", 2235 ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid, 2236 ep->l2t->idx); 2237 2238 state_set(&ep->com, CONNECTING); 2239 ep->tos = ep->com.cm_id->tos; 2240 2241 /* send connect request to rnic */ 2242 err = send_connect(ep); 2243 if (!err) 2244 goto out; 2245 2246 cxgb4_l2t_release(ep->l2t); 2247fail4: 2248 dst_release(ep->dst); 2249fail3: 2250 xa_erase_irq(&ep->com.dev->atids, ep->atid); 2251fail2a: 2252 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid); 2253fail2: 2254 /* 2255 * remember to send notification to upper layer. 2256 * We are in here so the upper layer is not aware that this is 2257 * re-connect attempt and so, upper layer is still waiting for 2258 * response of 1st connect request. 2259 */ 2260 connect_reply_upcall(ep, -ECONNRESET); 2261fail1: 2262 c4iw_put_ep(&ep->com); 2263out: 2264 return err; 2265} 2266 2267static int act_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb) 2268{ 2269 struct c4iw_ep *ep; 2270 struct cpl_act_open_rpl *rpl = cplhdr(skb); 2271 unsigned int atid = TID_TID_G(AOPEN_ATID_G( 2272 ntohl(rpl->atid_status))); 2273 struct tid_info *t = dev->rdev.lldi.tids; 2274 int status = AOPEN_STATUS_G(ntohl(rpl->atid_status)); 2275 struct sockaddr_in *la; 2276 struct sockaddr_in *ra; 2277 struct sockaddr_in6 *la6; 2278 struct sockaddr_in6 *ra6; 2279 int ret = 0; 2280 2281 ep = lookup_atid(t, atid); 2282 la = (struct sockaddr_in *)&ep->com.local_addr; 2283 ra = (struct sockaddr_in *)&ep->com.remote_addr; 2284 la6 = (struct sockaddr_in6 *)&ep->com.local_addr; 2285 ra6 = (struct sockaddr_in6 *)&ep->com.remote_addr; 2286 2287 pr_debug("ep %p atid %u status %u errno %d\n", ep, atid, 2288 status, status2errno(status)); 2289 2290 if (cxgb_is_neg_adv(status)) { 2291 pr_debug("Connection problems for atid %u status %u (%s)\n", 2292 atid, status, neg_adv_str(status)); 2293 ep->stats.connect_neg_adv++; 2294 mutex_lock(&dev->rdev.stats.lock); 2295 dev->rdev.stats.neg_adv++; 2296 mutex_unlock(&dev->rdev.stats.lock); 2297 return 0; 2298 } 2299 2300 set_bit(ACT_OPEN_RPL, &ep->com.history); 2301 2302 /* 2303 * Log interesting failures. 2304 */ 2305 switch (status) { 2306 case CPL_ERR_CONN_RESET: 2307 case CPL_ERR_CONN_TIMEDOUT: 2308 break; 2309 case CPL_ERR_TCAM_FULL: 2310 mutex_lock(&dev->rdev.stats.lock); 2311 dev->rdev.stats.tcam_full++; 2312 mutex_unlock(&dev->rdev.stats.lock); 2313 if (ep->com.local_addr.ss_family == AF_INET && 2314 dev->rdev.lldi.enable_fw_ofld_conn) { 2315 ret = send_fw_act_open_req(ep, TID_TID_G(AOPEN_ATID_G( 2316 ntohl(rpl->atid_status)))); 2317 if (ret) 2318 goto fail; 2319 return 0; 2320 } 2321 break; 2322 case CPL_ERR_CONN_EXIST: 2323 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) { 2324 set_bit(ACT_RETRY_INUSE, &ep->com.history); 2325 if (ep->com.remote_addr.ss_family == AF_INET6) { 2326 struct sockaddr_in6 *sin6 = 2327 (struct sockaddr_in6 *) 2328 &ep->com.local_addr; 2329 cxgb4_clip_release( 2330 ep->com.dev->rdev.lldi.ports[0], 2331 (const u32 *) 2332 &sin6->sin6_addr.s6_addr, 1); 2333 } 2334 xa_erase_irq(&ep->com.dev->atids, atid); 2335 cxgb4_free_atid(t, atid); 2336 dst_release(ep->dst); 2337 cxgb4_l2t_release(ep->l2t); 2338 c4iw_reconnect(ep); 2339 return 0; 2340 } 2341 break; 2342 default: 2343 if (ep->com.local_addr.ss_family == AF_INET) { 2344 pr_info("Active open failure - atid %u status %u errno %d %pI4:%u->%pI4:%u\n", 2345 atid, status, status2errno(status), 2346 &la->sin_addr.s_addr, ntohs(la->sin_port), 2347 &ra->sin_addr.s_addr, ntohs(ra->sin_port)); 2348 } else { 2349 pr_info("Active open failure - atid %u status %u errno %d %pI6:%u->%pI6:%u\n", 2350 atid, status, status2errno(status), 2351 la6->sin6_addr.s6_addr, ntohs(la6->sin6_port), 2352 ra6->sin6_addr.s6_addr, ntohs(ra6->sin6_port)); 2353 } 2354 break; 2355 } 2356 2357fail: 2358 connect_reply_upcall(ep, status2errno(status)); 2359 state_set(&ep->com, DEAD); 2360 2361 if (ep->com.remote_addr.ss_family == AF_INET6) { 2362 struct sockaddr_in6 *sin6 = 2363 (struct sockaddr_in6 *)&ep->com.local_addr; 2364 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0], 2365 (const u32 *)&sin6->sin6_addr.s6_addr, 1); 2366 } 2367 if (status && act_open_has_tid(status)) 2368 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, GET_TID(rpl), 2369 ep->com.local_addr.ss_family); 2370 2371 xa_erase_irq(&ep->com.dev->atids, atid); 2372 cxgb4_free_atid(t, atid); 2373 dst_release(ep->dst); 2374 cxgb4_l2t_release(ep->l2t); 2375 c4iw_put_ep(&ep->com); 2376 2377 return 0; 2378} 2379 2380static int pass_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb) 2381{ 2382 struct cpl_pass_open_rpl *rpl = cplhdr(skb); 2383 unsigned int stid = GET_TID(rpl); 2384 struct c4iw_listen_ep *ep = get_ep_from_stid(dev, stid); 2385 2386 if (!ep) { 2387 pr_warn("%s stid %d lookup failure!\n", __func__, stid); 2388 goto out; 2389 } 2390 pr_debug("ep %p status %d error %d\n", ep, 2391 rpl->status, status2errno(rpl->status)); 2392 c4iw_wake_up_noref(ep->com.wr_waitp, status2errno(rpl->status)); 2393 c4iw_put_ep(&ep->com); 2394out: 2395 return 0; 2396} 2397 2398static int close_listsrv_rpl(struct c4iw_dev *dev, struct sk_buff *skb) 2399{ 2400 struct cpl_close_listsvr_rpl *rpl = cplhdr(skb); 2401 unsigned int stid = GET_TID(rpl); 2402 struct c4iw_listen_ep *ep = get_ep_from_stid(dev, stid); 2403 2404 if (!ep) { 2405 pr_warn("%s stid %d lookup failure!\n", __func__, stid); 2406 goto out; 2407 } 2408 pr_debug("ep %p\n", ep); 2409 c4iw_wake_up_noref(ep->com.wr_waitp, status2errno(rpl->status)); 2410 c4iw_put_ep(&ep->com); 2411out: 2412 return 0; 2413} 2414 2415static int accept_cr(struct c4iw_ep *ep, struct sk_buff *skb, 2416 struct cpl_pass_accept_req *req) 2417{ 2418 struct cpl_pass_accept_rpl *rpl; 2419 unsigned int mtu_idx; 2420 u64 opt0; 2421 u32 opt2; 2422 u32 wscale; 2423 struct cpl_t5_pass_accept_rpl *rpl5 = NULL; 2424 int win; 2425 enum chip_type adapter_type = ep->com.dev->rdev.lldi.adapter_type; 2426 2427 pr_debug("ep %p tid %u\n", ep, ep->hwtid); 2428 cxgb_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx, 2429 enable_tcp_timestamps && req->tcpopt.tstamp, 2430 (ep->com.remote_addr.ss_family == AF_INET) ? 0 : 1); 2431 wscale = cxgb_compute_wscale(rcv_win); 2432 2433 /* 2434 * Specify the largest window that will fit in opt0. The 2435 * remainder will be specified in the rx_data_ack. 2436 */ 2437 win = ep->rcv_win >> 10; 2438 if (win > RCV_BUFSIZ_M) 2439 win = RCV_BUFSIZ_M; 2440 opt0 = (nocong ? NO_CONG_F : 0) | 2441 KEEP_ALIVE_F | 2442 DELACK_F | 2443 WND_SCALE_V(wscale) | 2444 MSS_IDX_V(mtu_idx) | 2445 L2T_IDX_V(ep->l2t->idx) | 2446 TX_CHAN_V(ep->tx_chan) | 2447 SMAC_SEL_V(ep->smac_idx) | 2448 DSCP_V(ep->tos >> 2) | 2449 ULP_MODE_V(ULP_MODE_TCPDDP) | 2450 RCV_BUFSIZ_V(win); 2451 opt2 = RX_CHANNEL_V(0) | 2452 RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid); 2453 2454 if (enable_tcp_timestamps && req->tcpopt.tstamp) 2455 opt2 |= TSTAMPS_EN_F; 2456 if (enable_tcp_sack && req->tcpopt.sack) 2457 opt2 |= SACK_EN_F; 2458 if (wscale && enable_tcp_window_scaling) 2459 opt2 |= WND_SCALE_EN_F; 2460 if (enable_ecn) { 2461 const struct tcphdr *tcph; 2462 u32 hlen = ntohl(req->hdr_len); 2463 2464 if (CHELSIO_CHIP_VERSION(adapter_type) <= CHELSIO_T5) 2465 tcph = (const void *)(req + 1) + ETH_HDR_LEN_G(hlen) + 2466 IP_HDR_LEN_G(hlen); 2467 else 2468 tcph = (const void *)(req + 1) + 2469 T6_ETH_HDR_LEN_G(hlen) + T6_IP_HDR_LEN_G(hlen); 2470 if (tcph->ece && tcph->cwr) 2471 opt2 |= CCTRL_ECN_V(1); 2472 } 2473 2474 skb_get(skb); 2475 rpl = cplhdr(skb); 2476 if (!is_t4(adapter_type)) { 2477 skb_trim(skb, roundup(sizeof(*rpl5), 16)); 2478 rpl5 = (void *)rpl; 2479 INIT_TP_WR(rpl5, ep->hwtid); 2480 } else { 2481 skb_trim(skb, sizeof(*rpl)); 2482 INIT_TP_WR(rpl, ep->hwtid); 2483 } 2484 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL, 2485 ep->hwtid)); 2486 2487 if (CHELSIO_CHIP_VERSION(adapter_type) > CHELSIO_T4) { 2488 u32 isn = (prandom_u32() & ~7UL) - 1; 2489 opt2 |= T5_OPT_2_VALID_F; 2490 opt2 |= CONG_CNTRL_V(CONG_ALG_TAHOE); 2491 opt2 |= T5_ISS_F; 2492 rpl5 = (void *)rpl; 2493 memset(&rpl5->iss, 0, roundup(sizeof(*rpl5)-sizeof(*rpl), 16)); 2494 if (peer2peer) 2495 isn += 4; 2496 rpl5->iss = cpu_to_be32(isn); 2497 pr_debug("iss %u\n", be32_to_cpu(rpl5->iss)); 2498 } 2499 2500 rpl->opt0 = cpu_to_be64(opt0); 2501 rpl->opt2 = cpu_to_be32(opt2); 2502 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx); 2503 t4_set_arp_err_handler(skb, ep, pass_accept_rpl_arp_failure); 2504 2505 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t); 2506} 2507 2508static void reject_cr(struct c4iw_dev *dev, u32 hwtid, struct sk_buff *skb) 2509{ 2510 pr_debug("c4iw_dev %p tid %u\n", dev, hwtid); 2511 skb_trim(skb, sizeof(struct cpl_tid_release)); 2512 release_tid(&dev->rdev, hwtid, skb); 2513 return; 2514} 2515 2516static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb) 2517{ 2518 struct c4iw_ep *child_ep = NULL, *parent_ep; 2519 struct cpl_pass_accept_req *req = cplhdr(skb); 2520 unsigned int stid = PASS_OPEN_TID_G(ntohl(req->tos_stid)); 2521 struct tid_info *t = dev->rdev.lldi.tids; 2522 unsigned int hwtid = GET_TID(req); 2523 struct dst_entry *dst; 2524 __u8 local_ip[16], peer_ip[16]; 2525 __be16 local_port, peer_port; 2526 struct sockaddr_in6 *sin6; 2527 int err; 2528 u16 peer_mss = ntohs(req->tcpopt.mss); 2529 int iptype; 2530 unsigned short hdrs; 2531 u8 tos; 2532 2533 parent_ep = (struct c4iw_ep *)get_ep_from_stid(dev, stid); 2534 if (!parent_ep) { 2535 pr_err("%s connect request on invalid stid %d\n", 2536 __func__, stid); 2537 goto reject; 2538 } 2539 2540 if (state_read(&parent_ep->com) != LISTEN) { 2541 pr_err("%s - listening ep not in LISTEN\n", __func__); 2542 goto reject; 2543 } 2544 2545 if (parent_ep->com.cm_id->tos_set) 2546 tos = parent_ep->com.cm_id->tos; 2547 else 2548 tos = PASS_OPEN_TOS_G(ntohl(req->tos_stid)); 2549 2550 cxgb_get_4tuple(req, parent_ep->com.dev->rdev.lldi.adapter_type, 2551 &iptype, local_ip, peer_ip, &local_port, &peer_port); 2552 2553 /* Find output route */ 2554 if (iptype == 4) { 2555 pr_debug("parent ep %p hwtid %u laddr %pI4 raddr %pI4 lport %d rport %d peer_mss %d\n" 2556 , parent_ep, hwtid, 2557 local_ip, peer_ip, ntohs(local_port), 2558 ntohs(peer_port), peer_mss); 2559 dst = cxgb_find_route(&dev->rdev.lldi, get_real_dev, 2560 *(__be32 *)local_ip, *(__be32 *)peer_ip, 2561 local_port, peer_port, tos); 2562 } else { 2563 pr_debug("parent ep %p hwtid %u laddr %pI6 raddr %pI6 lport %d rport %d peer_mss %d\n" 2564 , parent_ep, hwtid, 2565 local_ip, peer_ip, ntohs(local_port), 2566 ntohs(peer_port), peer_mss); 2567 dst = cxgb_find_route6(&dev->rdev.lldi, get_real_dev, 2568 local_ip, peer_ip, local_port, peer_port, 2569 tos, 2570 ((struct sockaddr_in6 *) 2571 &parent_ep->com.local_addr)->sin6_scope_id); 2572 } 2573 if (!dst) { 2574 pr_err("%s - failed to find dst entry!\n", __func__); 2575 goto reject; 2576 } 2577 2578 child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL); 2579 if (!child_ep) { 2580 pr_err("%s - failed to allocate ep entry!\n", __func__); 2581 dst_release(dst); 2582 goto reject; 2583 } 2584 2585 err = import_ep(child_ep, iptype, peer_ip, dst, dev, false, 2586 parent_ep->com.dev->rdev.lldi.adapter_type, tos); 2587 if (err) { 2588 pr_err("%s - failed to allocate l2t entry!\n", __func__); 2589 dst_release(dst); 2590 kfree(child_ep); 2591 goto reject; 2592 } 2593 2594 hdrs = ((iptype == 4) ? sizeof(struct iphdr) : sizeof(struct ipv6hdr)) + 2595 sizeof(struct tcphdr) + 2596 ((enable_tcp_timestamps && req->tcpopt.tstamp) ? 12 : 0); 2597 if (peer_mss && child_ep->mtu > (peer_mss + hdrs)) 2598 child_ep->mtu = peer_mss + hdrs; 2599 2600 skb_queue_head_init(&child_ep->com.ep_skb_list); 2601 if (alloc_ep_skb_list(&child_ep->com.ep_skb_list, CN_MAX_CON_BUF)) 2602 goto fail; 2603 2604 state_set(&child_ep->com, CONNECTING); 2605 child_ep->com.dev = dev; 2606 child_ep->com.cm_id = NULL; 2607 2608 if (iptype == 4) { 2609 struct sockaddr_in *sin = (struct sockaddr_in *) 2610 &child_ep->com.local_addr; 2611 2612 sin->sin_family = AF_INET; 2613 sin->sin_port = local_port; 2614 sin->sin_addr.s_addr = *(__be32 *)local_ip; 2615 2616 sin = (struct sockaddr_in *)&child_ep->com.local_addr; 2617 sin->sin_family = AF_INET; 2618 sin->sin_port = ((struct sockaddr_in *) 2619 &parent_ep->com.local_addr)->sin_port; 2620 sin->sin_addr.s_addr = *(__be32 *)local_ip; 2621 2622 sin = (struct sockaddr_in *)&child_ep->com.remote_addr; 2623 sin->sin_family = AF_INET; 2624 sin->sin_port = peer_port; 2625 sin->sin_addr.s_addr = *(__be32 *)peer_ip; 2626 } else { 2627 sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr; 2628 sin6->sin6_family = PF_INET6; 2629 sin6->sin6_port = local_port; 2630 memcpy(sin6->sin6_addr.s6_addr, local_ip, 16); 2631 2632 sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr; 2633 sin6->sin6_family = PF_INET6; 2634 sin6->sin6_port = ((struct sockaddr_in6 *) 2635 &parent_ep->com.local_addr)->sin6_port; 2636 memcpy(sin6->sin6_addr.s6_addr, local_ip, 16); 2637 2638 sin6 = (struct sockaddr_in6 *)&child_ep->com.remote_addr; 2639 sin6->sin6_family = PF_INET6; 2640 sin6->sin6_port = peer_port; 2641 memcpy(sin6->sin6_addr.s6_addr, peer_ip, 16); 2642 } 2643 2644 c4iw_get_ep(&parent_ep->com); 2645 child_ep->parent_ep = parent_ep; 2646 child_ep->tos = tos; 2647 child_ep->dst = dst; 2648 child_ep->hwtid = hwtid; 2649 2650 pr_debug("tx_chan %u smac_idx %u rss_qid %u\n", 2651 child_ep->tx_chan, child_ep->smac_idx, child_ep->rss_qid); 2652 2653 timer_setup(&child_ep->timer, ep_timeout, 0); 2654 cxgb4_insert_tid(t, child_ep, hwtid, 2655 child_ep->com.local_addr.ss_family); 2656 insert_ep_tid(child_ep); 2657 if (accept_cr(child_ep, skb, req)) { 2658 c4iw_put_ep(&parent_ep->com); 2659 release_ep_resources(child_ep); 2660 } else { 2661 set_bit(PASS_ACCEPT_REQ, &child_ep->com.history); 2662 } 2663 if (iptype == 6) { 2664 sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr; 2665 cxgb4_clip_get(child_ep->com.dev->rdev.lldi.ports[0], 2666 (const u32 *)&sin6->sin6_addr.s6_addr, 1); 2667 } 2668 goto out; 2669fail: 2670 c4iw_put_ep(&child_ep->com); 2671reject: 2672 reject_cr(dev, hwtid, skb); 2673out: 2674 if (parent_ep) 2675 c4iw_put_ep(&parent_ep->com); 2676 return 0; 2677} 2678 2679static int pass_establish(struct c4iw_dev *dev, struct sk_buff *skb) 2680{ 2681 struct c4iw_ep *ep; 2682 struct cpl_pass_establish *req = cplhdr(skb); 2683 unsigned int tid = GET_TID(req); 2684 int ret; 2685 u16 tcp_opt = ntohs(req->tcp_opt); 2686 2687 ep = get_ep_from_tid(dev, tid); 2688 pr_debug("ep %p tid %u\n", ep, ep->hwtid); 2689 ep->snd_seq = be32_to_cpu(req->snd_isn); 2690 ep->rcv_seq = be32_to_cpu(req->rcv_isn); 2691 ep->snd_wscale = TCPOPT_SND_WSCALE_G(tcp_opt); 2692 2693 pr_debug("ep %p hwtid %u tcp_opt 0x%02x\n", ep, tid, tcp_opt); 2694 2695 set_emss(ep, tcp_opt); 2696 2697 dst_confirm(ep->dst); 2698 mutex_lock(&ep->com.mutex); 2699 ep->com.state = MPA_REQ_WAIT; 2700 start_ep_timer(ep); 2701 set_bit(PASS_ESTAB, &ep->com.history); 2702 ret = send_flowc(ep); 2703 mutex_unlock(&ep->com.mutex); 2704 if (ret) 2705 c4iw_ep_disconnect(ep, 1, GFP_KERNEL); 2706 c4iw_put_ep(&ep->com); 2707 2708 return 0; 2709} 2710 2711static int peer_close(struct c4iw_dev *dev, struct sk_buff *skb) 2712{ 2713 struct cpl_peer_close *hdr = cplhdr(skb); 2714 struct c4iw_ep *ep; 2715 struct c4iw_qp_attributes attrs; 2716 int disconnect = 1; 2717 int release = 0; 2718 unsigned int tid = GET_TID(hdr); 2719 int ret; 2720 2721 ep = get_ep_from_tid(dev, tid); 2722 if (!ep) 2723 return 0; 2724 2725 pr_debug("ep %p tid %u\n", ep, ep->hwtid); 2726 dst_confirm(ep->dst); 2727 2728 set_bit(PEER_CLOSE, &ep->com.history); 2729 mutex_lock(&ep->com.mutex); 2730 switch (ep->com.state) { 2731 case MPA_REQ_WAIT: 2732 __state_set(&ep->com, CLOSING); 2733 break; 2734 case MPA_REQ_SENT: 2735 __state_set(&ep->com, CLOSING); 2736 connect_reply_upcall(ep, -ECONNRESET); 2737 break; 2738 case MPA_REQ_RCVD: 2739 2740 /* 2741 * We're gonna mark this puppy DEAD, but keep 2742 * the reference on it until the ULP accepts or 2743 * rejects the CR. Also wake up anyone waiting 2744 * in rdma connection migration (see c4iw_accept_cr()). 2745 */ 2746 __state_set(&ep->com, CLOSING); 2747 pr_debug("waking up ep %p tid %u\n", ep, ep->hwtid); 2748 c4iw_wake_up_noref(ep->com.wr_waitp, -ECONNRESET); 2749 break; 2750 case MPA_REP_SENT: 2751 __state_set(&ep->com, CLOSING); 2752 pr_debug("waking up ep %p tid %u\n", ep, ep->hwtid); 2753 c4iw_wake_up_noref(ep->com.wr_waitp, -ECONNRESET); 2754 break; 2755 case FPDU_MODE: 2756 start_ep_timer(ep); 2757 __state_set(&ep->com, CLOSING); 2758 attrs.next_state = C4IW_QP_STATE_CLOSING; 2759 ret = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp, 2760 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1); 2761 if (ret != -ECONNRESET) { 2762 peer_close_upcall(ep); 2763 disconnect = 1; 2764 } 2765 break; 2766 case ABORTING: 2767 disconnect = 0; 2768 break; 2769 case CLOSING: 2770 __state_set(&ep->com, MORIBUND); 2771 disconnect = 0; 2772 break; 2773 case MORIBUND: 2774 (void)stop_ep_timer(ep); 2775 if (ep->com.cm_id && ep->com.qp) { 2776 attrs.next_state = C4IW_QP_STATE_IDLE; 2777 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp, 2778 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1); 2779 } 2780 close_complete_upcall(ep, 0); 2781 __state_set(&ep->com, DEAD); 2782 release = 1; 2783 disconnect = 0; 2784 break; 2785 case DEAD: 2786 disconnect = 0; 2787 break; 2788 default: 2789 WARN_ONCE(1, "Bad endpoint state %u\n", ep->com.state); 2790 } 2791 mutex_unlock(&ep->com.mutex); 2792 if (disconnect) 2793 c4iw_ep_disconnect(ep, 0, GFP_KERNEL); 2794 if (release) 2795 release_ep_resources(ep); 2796 c4iw_put_ep(&ep->com); 2797 return 0; 2798} 2799 2800static void finish_peer_abort(struct c4iw_dev *dev, struct c4iw_ep *ep) 2801{ 2802 complete_cached_srq_buffers(ep, ep->srqe_idx); 2803 if (ep->com.cm_id && ep->com.qp) { 2804 struct c4iw_qp_attributes attrs; 2805 2806 attrs.next_state = C4IW_QP_STATE_ERROR; 2807 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp, 2808 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1); 2809 } 2810 peer_abort_upcall(ep); 2811 release_ep_resources(ep); 2812 c4iw_put_ep(&ep->com); 2813} 2814 2815static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb) 2816{ 2817 struct cpl_abort_req_rss6 *req = cplhdr(skb); 2818 struct c4iw_ep *ep; 2819 struct sk_buff *rpl_skb; 2820 struct c4iw_qp_attributes attrs; 2821 int ret; 2822 int release = 0; 2823 unsigned int tid = GET_TID(req); 2824 u8 status; 2825 u32 srqidx; 2826 2827 u32 len = roundup(sizeof(struct cpl_abort_rpl), 16); 2828 2829 ep = get_ep_from_tid(dev, tid); 2830 if (!ep) 2831 return 0; 2832 2833 status = ABORT_RSS_STATUS_G(be32_to_cpu(req->srqidx_status)); 2834 2835 if (cxgb_is_neg_adv(status)) { 2836 pr_debug("Negative advice on abort- tid %u status %d (%s)\n", 2837 ep->hwtid, status, neg_adv_str(status)); 2838 ep->stats.abort_neg_adv++; 2839 mutex_lock(&dev->rdev.stats.lock); 2840 dev->rdev.stats.neg_adv++; 2841 mutex_unlock(&dev->rdev.stats.lock); 2842 goto deref_ep; 2843 } 2844 2845 pr_debug("ep %p tid %u state %u\n", ep, ep->hwtid, 2846 ep->com.state); 2847 set_bit(PEER_ABORT, &ep->com.history); 2848 2849 /* 2850 * Wake up any threads in rdma_init() or rdma_fini(). 2851 * However, this is not needed if com state is just 2852 * MPA_REQ_SENT 2853 */ 2854 if (ep->com.state != MPA_REQ_SENT) 2855 c4iw_wake_up_noref(ep->com.wr_waitp, -ECONNRESET); 2856 2857 mutex_lock(&ep->com.mutex); 2858 switch (ep->com.state) { 2859 case CONNECTING: 2860 c4iw_put_ep(&ep->parent_ep->com); 2861 break; 2862 case MPA_REQ_WAIT: 2863 (void)stop_ep_timer(ep); 2864 break; 2865 case MPA_REQ_SENT: 2866 (void)stop_ep_timer(ep); 2867 if (status != CPL_ERR_CONN_RESET || mpa_rev == 1 || 2868 (mpa_rev == 2 && ep->tried_with_mpa_v1)) 2869 connect_reply_upcall(ep, -ECONNRESET); 2870 else { 2871 /* 2872 * we just don't send notification upwards because we 2873 * want to retry with mpa_v1 without upper layers even 2874 * knowing it. 2875 * 2876 * do some housekeeping so as to re-initiate the 2877 * connection 2878 */ 2879 pr_info("%s: mpa_rev=%d. Retrying with mpav1\n", 2880 __func__, mpa_rev); 2881 ep->retry_with_mpa_v1 = 1; 2882 } 2883 break; 2884 case MPA_REP_SENT: 2885 break; 2886 case MPA_REQ_RCVD: 2887 break; 2888 case MORIBUND: 2889 case CLOSING: 2890 stop_ep_timer(ep); 2891 fallthrough; 2892 case FPDU_MODE: 2893 if (ep->com.qp && ep->com.qp->srq) { 2894 srqidx = ABORT_RSS_SRQIDX_G( 2895 be32_to_cpu(req->srqidx_status)); 2896 if (srqidx) { 2897 complete_cached_srq_buffers(ep, srqidx); 2898 } else { 2899 /* Hold ep ref until finish_peer_abort() */ 2900 c4iw_get_ep(&ep->com); 2901 __state_set(&ep->com, ABORTING); 2902 set_bit(PEER_ABORT_IN_PROGRESS, &ep->com.flags); 2903 read_tcb(ep); 2904 break; 2905 2906 } 2907 } 2908 2909 if (ep->com.cm_id && ep->com.qp) { 2910 attrs.next_state = C4IW_QP_STATE_ERROR; 2911 ret = c4iw_modify_qp(ep->com.qp->rhp, 2912 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE, 2913 &attrs, 1); 2914 if (ret) 2915 pr_err("%s - qp <- error failed!\n", __func__); 2916 } 2917 peer_abort_upcall(ep); 2918 break; 2919 case ABORTING: 2920 break; 2921 case DEAD: 2922 pr_warn("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__); 2923 mutex_unlock(&ep->com.mutex); 2924 goto deref_ep; 2925 default: 2926 WARN_ONCE(1, "Bad endpoint state %u\n", ep->com.state); 2927 break; 2928 } 2929 dst_confirm(ep->dst); 2930 if (ep->com.state != ABORTING) { 2931 __state_set(&ep->com, DEAD); 2932 /* we don't release if we want to retry with mpa_v1 */ 2933 if (!ep->retry_with_mpa_v1) 2934 release = 1; 2935 } 2936 mutex_unlock(&ep->com.mutex); 2937 2938 rpl_skb = skb_dequeue(&ep->com.ep_skb_list); 2939 if (WARN_ON(!rpl_skb)) { 2940 release = 1; 2941 goto out; 2942 } 2943 2944 cxgb_mk_abort_rpl(rpl_skb, len, ep->hwtid, ep->txq_idx); 2945 2946 c4iw_ofld_send(&ep->com.dev->rdev, rpl_skb); 2947out: 2948 if (release) 2949 release_ep_resources(ep); 2950 else if (ep->retry_with_mpa_v1) { 2951 if (ep->com.remote_addr.ss_family == AF_INET6) { 2952 struct sockaddr_in6 *sin6 = 2953 (struct sockaddr_in6 *) 2954 &ep->com.local_addr; 2955 cxgb4_clip_release( 2956 ep->com.dev->rdev.lldi.ports[0], 2957 (const u32 *)&sin6->sin6_addr.s6_addr, 2958 1); 2959 } 2960 xa_erase_irq(&ep->com.dev->hwtids, ep->hwtid); 2961 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid, 2962 ep->com.local_addr.ss_family); 2963 dst_release(ep->dst); 2964 cxgb4_l2t_release(ep->l2t); 2965 c4iw_reconnect(ep); 2966 } 2967 2968deref_ep: 2969 c4iw_put_ep(&ep->com); 2970 /* Dereferencing ep, referenced in peer_abort_intr() */ 2971 c4iw_put_ep(&ep->com); 2972 return 0; 2973} 2974 2975static int close_con_rpl(struct c4iw_dev *dev, struct sk_buff *skb) 2976{ 2977 struct c4iw_ep *ep; 2978 struct c4iw_qp_attributes attrs; 2979 struct cpl_close_con_rpl *rpl = cplhdr(skb); 2980 int release = 0; 2981 unsigned int tid = GET_TID(rpl); 2982 2983 ep = get_ep_from_tid(dev, tid); 2984 if (!ep) 2985 return 0; 2986 2987 pr_debug("ep %p tid %u\n", ep, ep->hwtid); 2988 2989 /* The cm_id may be null if we failed to connect */ 2990 mutex_lock(&ep->com.mutex); 2991 set_bit(CLOSE_CON_RPL, &ep->com.history); 2992 switch (ep->com.state) { 2993 case CLOSING: 2994 __state_set(&ep->com, MORIBUND); 2995 break; 2996 case MORIBUND: 2997 (void)stop_ep_timer(ep); 2998 if ((ep->com.cm_id) && (ep->com.qp)) { 2999 attrs.next_state = C4IW_QP_STATE_IDLE; 3000 c4iw_modify_qp(ep->com.qp->rhp, 3001 ep->com.qp, 3002 C4IW_QP_ATTR_NEXT_STATE, 3003 &attrs, 1); 3004 } 3005 close_complete_upcall(ep, 0); 3006 __state_set(&ep->com, DEAD); 3007 release = 1; 3008 break; 3009 case ABORTING: 3010 case DEAD: 3011 break; 3012 default: 3013 WARN_ONCE(1, "Bad endpoint state %u\n", ep->com.state); 3014 break; 3015 } 3016 mutex_unlock(&ep->com.mutex); 3017 if (release) 3018 release_ep_resources(ep); 3019 c4iw_put_ep(&ep->com); 3020 return 0; 3021} 3022 3023static int terminate(struct c4iw_dev *dev, struct sk_buff *skb) 3024{ 3025 struct cpl_rdma_terminate *rpl = cplhdr(skb); 3026 unsigned int tid = GET_TID(rpl); 3027 struct c4iw_ep *ep; 3028 struct c4iw_qp_attributes attrs; 3029 3030 ep = get_ep_from_tid(dev, tid); 3031 3032 if (ep) { 3033 if (ep->com.qp) { 3034 pr_warn("TERM received tid %u qpid %u\n", tid, 3035 ep->com.qp->wq.sq.qid); 3036 attrs.next_state = C4IW_QP_STATE_TERMINATE; 3037 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp, 3038 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1); 3039 } 3040 3041 /* As per draft-hilland-iwarp-verbs-v1.0, sec 6.2.3, 3042 * when entering the TERM state the RNIC MUST initiate a CLOSE. 3043 */ 3044 c4iw_ep_disconnect(ep, 1, GFP_KERNEL); 3045 c4iw_put_ep(&ep->com); 3046 } else 3047 pr_warn("TERM received tid %u no ep/qp\n", tid); 3048 3049 return 0; 3050} 3051 3052/* 3053 * Upcall from the adapter indicating data has been transmitted. 3054 * For us its just the single MPA request or reply. We can now free 3055 * the skb holding the mpa message. 3056 */ 3057static int fw4_ack(struct c4iw_dev *dev, struct sk_buff *skb) 3058{ 3059 struct c4iw_ep *ep; 3060 struct cpl_fw4_ack *hdr = cplhdr(skb); 3061 u8 credits = hdr->credits; 3062 unsigned int tid = GET_TID(hdr); 3063 3064 3065 ep = get_ep_from_tid(dev, tid); 3066 if (!ep) 3067 return 0; 3068 pr_debug("ep %p tid %u credits %u\n", 3069 ep, ep->hwtid, credits); 3070 if (credits == 0) { 3071 pr_debug("0 credit ack ep %p tid %u state %u\n", 3072 ep, ep->hwtid, state_read(&ep->com)); 3073 goto out; 3074 } 3075 3076 dst_confirm(ep->dst); 3077 if (ep->mpa_skb) { 3078 pr_debug("last streaming msg ack ep %p tid %u state %u initiator %u freeing skb\n", 3079 ep, ep->hwtid, state_read(&ep->com), 3080 ep->mpa_attr.initiator ? 1 : 0); 3081 mutex_lock(&ep->com.mutex); 3082 kfree_skb(ep->mpa_skb); 3083 ep->mpa_skb = NULL; 3084 if (test_bit(STOP_MPA_TIMER, &ep->com.flags)) 3085 stop_ep_timer(ep); 3086 mutex_unlock(&ep->com.mutex); 3087 } 3088out: 3089 c4iw_put_ep(&ep->com); 3090 return 0; 3091} 3092 3093int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len) 3094{ 3095 int abort; 3096 struct c4iw_ep *ep = to_ep(cm_id); 3097 3098 pr_debug("ep %p tid %u\n", ep, ep->hwtid); 3099 3100 mutex_lock(&ep->com.mutex); 3101 if (ep->com.state != MPA_REQ_RCVD) { 3102 mutex_unlock(&ep->com.mutex); 3103 c4iw_put_ep(&ep->com); 3104 return -ECONNRESET; 3105 } 3106 set_bit(ULP_REJECT, &ep->com.history); 3107 if (mpa_rev == 0) 3108 abort = 1; 3109 else 3110 abort = send_mpa_reject(ep, pdata, pdata_len); 3111 mutex_unlock(&ep->com.mutex); 3112 3113 stop_ep_timer(ep); 3114 c4iw_ep_disconnect(ep, abort != 0, GFP_KERNEL); 3115 c4iw_put_ep(&ep->com); 3116 return 0; 3117} 3118 3119int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) 3120{ 3121 int err; 3122 struct c4iw_qp_attributes attrs; 3123 enum c4iw_qp_attr_mask mask; 3124 struct c4iw_ep *ep = to_ep(cm_id); 3125 struct c4iw_dev *h = to_c4iw_dev(cm_id->device); 3126 struct c4iw_qp *qp = get_qhp(h, conn_param->qpn); 3127 int abort = 0; 3128 3129 pr_debug("ep %p tid %u\n", ep, ep->hwtid); 3130 3131 mutex_lock(&ep->com.mutex); 3132 if (ep->com.state != MPA_REQ_RCVD) { 3133 err = -ECONNRESET; 3134 goto err_out; 3135 } 3136 3137 if (!qp) { 3138 err = -EINVAL; 3139 goto err_out; 3140 } 3141 3142 set_bit(ULP_ACCEPT, &ep->com.history); 3143 if ((conn_param->ord > cur_max_read_depth(ep->com.dev)) || 3144 (conn_param->ird > cur_max_read_depth(ep->com.dev))) { 3145 err = -EINVAL; 3146 goto err_abort; 3147 } 3148 3149 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) { 3150 if (conn_param->ord > ep->ird) { 3151 if (RELAXED_IRD_NEGOTIATION) { 3152 conn_param->ord = ep->ird; 3153 } else { 3154 ep->ird = conn_param->ird; 3155 ep->ord = conn_param->ord; 3156 send_mpa_reject(ep, conn_param->private_data, 3157 conn_param->private_data_len); 3158 err = -ENOMEM; 3159 goto err_abort; 3160 } 3161 } 3162 if (conn_param->ird < ep->ord) { 3163 if (RELAXED_IRD_NEGOTIATION && 3164 ep->ord <= h->rdev.lldi.max_ordird_qp) { 3165 conn_param->ird = ep->ord; 3166 } else { 3167 err = -ENOMEM; 3168 goto err_abort; 3169 } 3170 } 3171 } 3172 ep->ird = conn_param->ird; 3173 ep->ord = conn_param->ord; 3174 3175 if (ep->mpa_attr.version == 1) { 3176 if (peer2peer && ep->ird == 0) 3177 ep->ird = 1; 3178 } else { 3179 if (peer2peer && 3180 (ep->mpa_attr.p2p_type != FW_RI_INIT_P2PTYPE_DISABLED) && 3181 (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ) && ep->ird == 0) 3182 ep->ird = 1; 3183 } 3184 3185 pr_debug("ird %d ord %d\n", ep->ird, ep->ord); 3186 3187 ep->com.cm_id = cm_id; 3188 ref_cm_id(&ep->com); 3189 ep->com.qp = qp; 3190 ref_qp(ep); 3191 3192 /* bind QP to EP and move to RTS */ 3193 attrs.mpa_attr = ep->mpa_attr; 3194 attrs.max_ird = ep->ird; 3195 attrs.max_ord = ep->ord; 3196 attrs.llp_stream_handle = ep; 3197 attrs.next_state = C4IW_QP_STATE_RTS; 3198 3199 /* bind QP and TID with INIT_WR */ 3200 mask = C4IW_QP_ATTR_NEXT_STATE | 3201 C4IW_QP_ATTR_LLP_STREAM_HANDLE | 3202 C4IW_QP_ATTR_MPA_ATTR | 3203 C4IW_QP_ATTR_MAX_IRD | 3204 C4IW_QP_ATTR_MAX_ORD; 3205 3206 err = c4iw_modify_qp(ep->com.qp->rhp, 3207 ep->com.qp, mask, &attrs, 1); 3208 if (err) 3209 goto err_deref_cm_id; 3210 3211 set_bit(STOP_MPA_TIMER, &ep->com.flags); 3212 err = send_mpa_reply(ep, conn_param->private_data, 3213 conn_param->private_data_len); 3214 if (err) 3215 goto err_deref_cm_id; 3216 3217 __state_set(&ep->com, FPDU_MODE); 3218 established_upcall(ep); 3219 mutex_unlock(&ep->com.mutex); 3220 c4iw_put_ep(&ep->com); 3221 return 0; 3222err_deref_cm_id: 3223 deref_cm_id(&ep->com); 3224err_abort: 3225 abort = 1; 3226err_out: 3227 mutex_unlock(&ep->com.mutex); 3228 if (abort) 3229 c4iw_ep_disconnect(ep, 1, GFP_KERNEL); 3230 c4iw_put_ep(&ep->com); 3231 return err; 3232} 3233 3234static int pick_local_ipaddrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id) 3235{ 3236 struct in_device *ind; 3237 int found = 0; 3238 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->m_local_addr; 3239 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->m_remote_addr; 3240 const struct in_ifaddr *ifa; 3241 3242 ind = in_dev_get(dev->rdev.lldi.ports[0]); 3243 if (!ind) 3244 return -EADDRNOTAVAIL; 3245 rcu_read_lock(); 3246 in_dev_for_each_ifa_rcu(ifa, ind) { 3247 if (ifa->ifa_flags & IFA_F_SECONDARY) 3248 continue; 3249 laddr->sin_addr.s_addr = ifa->ifa_address; 3250 raddr->sin_addr.s_addr = ifa->ifa_address; 3251 found = 1; 3252 break; 3253 } 3254 rcu_read_unlock(); 3255 3256 in_dev_put(ind); 3257 return found ? 0 : -EADDRNOTAVAIL; 3258} 3259 3260static int get_lladdr(struct net_device *dev, struct in6_addr *addr, 3261 unsigned char banned_flags) 3262{ 3263 struct inet6_dev *idev; 3264 int err = -EADDRNOTAVAIL; 3265 3266 rcu_read_lock(); 3267 idev = __in6_dev_get(dev); 3268 if (idev != NULL) { 3269 struct inet6_ifaddr *ifp; 3270 3271 read_lock_bh(&idev->lock); 3272 list_for_each_entry(ifp, &idev->addr_list, if_list) { 3273 if (ifp->scope == IFA_LINK && 3274 !(ifp->flags & banned_flags)) { 3275 memcpy(addr, &ifp->addr, 16); 3276 err = 0; 3277 break; 3278 } 3279 } 3280 read_unlock_bh(&idev->lock); 3281 } 3282 rcu_read_unlock(); 3283 return err; 3284} 3285 3286static int pick_local_ip6addrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id) 3287{ 3288 struct in6_addr addr; 3289 struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)&cm_id->m_local_addr; 3290 struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr; 3291 3292 if (!get_lladdr(dev->rdev.lldi.ports[0], &addr, IFA_F_TENTATIVE)) { 3293 memcpy(la6->sin6_addr.s6_addr, &addr, 16); 3294 memcpy(ra6->sin6_addr.s6_addr, &addr, 16); 3295 return 0; 3296 } 3297 return -EADDRNOTAVAIL; 3298} 3299 3300int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) 3301{ 3302 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device); 3303 struct c4iw_ep *ep; 3304 int err = 0; 3305 struct sockaddr_in *laddr; 3306 struct sockaddr_in *raddr; 3307 struct sockaddr_in6 *laddr6; 3308 struct sockaddr_in6 *raddr6; 3309 __u8 *ra; 3310 int iptype; 3311 3312 if ((conn_param->ord > cur_max_read_depth(dev)) || 3313 (conn_param->ird > cur_max_read_depth(dev))) { 3314 err = -EINVAL; 3315 goto out; 3316 } 3317 ep = alloc_ep(sizeof(*ep), GFP_KERNEL); 3318 if (!ep) { 3319 pr_err("%s - cannot alloc ep\n", __func__); 3320 err = -ENOMEM; 3321 goto out; 3322 } 3323 3324 skb_queue_head_init(&ep->com.ep_skb_list); 3325 if (alloc_ep_skb_list(&ep->com.ep_skb_list, CN_MAX_CON_BUF)) { 3326 err = -ENOMEM; 3327 goto fail1; 3328 } 3329 3330 timer_setup(&ep->timer, ep_timeout, 0); 3331 ep->plen = conn_param->private_data_len; 3332 if (ep->plen) 3333 memcpy(ep->mpa_pkt + sizeof(struct mpa_message), 3334 conn_param->private_data, ep->plen); 3335 ep->ird = conn_param->ird; 3336 ep->ord = conn_param->ord; 3337 3338 if (peer2peer && ep->ord == 0) 3339 ep->ord = 1; 3340 3341 ep->com.cm_id = cm_id; 3342 ref_cm_id(&ep->com); 3343 cm_id->provider_data = ep; 3344 ep->com.dev = dev; 3345 ep->com.qp = get_qhp(dev, conn_param->qpn); 3346 if (!ep->com.qp) { 3347 pr_warn("%s qpn 0x%x not found!\n", __func__, conn_param->qpn); 3348 err = -EINVAL; 3349 goto fail2; 3350 } 3351 ref_qp(ep); 3352 pr_debug("qpn 0x%x qp %p cm_id %p\n", conn_param->qpn, 3353 ep->com.qp, cm_id); 3354 3355 /* 3356 * Allocate an active TID to initiate a TCP connection. 3357 */ 3358 ep->atid = cxgb4_alloc_atid(dev->rdev.lldi.tids, ep); 3359 if (ep->atid == -1) { 3360 pr_err("%s - cannot alloc atid\n", __func__); 3361 err = -ENOMEM; 3362 goto fail2; 3363 } 3364 err = xa_insert_irq(&dev->atids, ep->atid, ep, GFP_KERNEL); 3365 if (err) 3366 goto fail5; 3367 3368 memcpy(&ep->com.local_addr, &cm_id->m_local_addr, 3369 sizeof(ep->com.local_addr)); 3370 memcpy(&ep->com.remote_addr, &cm_id->m_remote_addr, 3371 sizeof(ep->com.remote_addr)); 3372 3373 laddr = (struct sockaddr_in *)&ep->com.local_addr; 3374 raddr = (struct sockaddr_in *)&ep->com.remote_addr; 3375 laddr6 = (struct sockaddr_in6 *)&ep->com.local_addr; 3376 raddr6 = (struct sockaddr_in6 *) &ep->com.remote_addr; 3377 3378 if (cm_id->m_remote_addr.ss_family == AF_INET) { 3379 iptype = 4; 3380 ra = (__u8 *)&raddr->sin_addr; 3381 3382 /* 3383 * Handle loopback requests to INADDR_ANY. 3384 */ 3385 if (raddr->sin_addr.s_addr == htonl(INADDR_ANY)) { 3386 err = pick_local_ipaddrs(dev, cm_id); 3387 if (err) 3388 goto fail3; 3389 } 3390 3391 /* find a route */ 3392 pr_debug("saddr %pI4 sport 0x%x raddr %pI4 rport 0x%x\n", 3393 &laddr->sin_addr, ntohs(laddr->sin_port), 3394 ra, ntohs(raddr->sin_port)); 3395 ep->dst = cxgb_find_route(&dev->rdev.lldi, get_real_dev, 3396 laddr->sin_addr.s_addr, 3397 raddr->sin_addr.s_addr, 3398 laddr->sin_port, 3399 raddr->sin_port, cm_id->tos); 3400 } else { 3401 iptype = 6; 3402 ra = (__u8 *)&raddr6->sin6_addr; 3403 3404 /* 3405 * Handle loopback requests to INADDR_ANY. 3406 */ 3407 if (ipv6_addr_type(&raddr6->sin6_addr) == IPV6_ADDR_ANY) { 3408 err = pick_local_ip6addrs(dev, cm_id); 3409 if (err) 3410 goto fail3; 3411 } 3412 3413 /* find a route */ 3414 pr_debug("saddr %pI6 sport 0x%x raddr %pI6 rport 0x%x\n", 3415 laddr6->sin6_addr.s6_addr, 3416 ntohs(laddr6->sin6_port), 3417 raddr6->sin6_addr.s6_addr, ntohs(raddr6->sin6_port)); 3418 ep->dst = cxgb_find_route6(&dev->rdev.lldi, get_real_dev, 3419 laddr6->sin6_addr.s6_addr, 3420 raddr6->sin6_addr.s6_addr, 3421 laddr6->sin6_port, 3422 raddr6->sin6_port, cm_id->tos, 3423 raddr6->sin6_scope_id); 3424 } 3425 if (!ep->dst) { 3426 pr_err("%s - cannot find route\n", __func__); 3427 err = -EHOSTUNREACH; 3428 goto fail3; 3429 } 3430 3431 err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, true, 3432 ep->com.dev->rdev.lldi.adapter_type, cm_id->tos); 3433 if (err) { 3434 pr_err("%s - cannot alloc l2e\n", __func__); 3435 goto fail4; 3436 } 3437 3438 pr_debug("txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n", 3439 ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid, 3440 ep->l2t->idx); 3441 3442 state_set(&ep->com, CONNECTING); 3443 ep->tos = cm_id->tos; 3444 3445 /* send connect request to rnic */ 3446 err = send_connect(ep); 3447 if (!err) 3448 goto out; 3449 3450 cxgb4_l2t_release(ep->l2t); 3451fail4: 3452 dst_release(ep->dst); 3453fail3: 3454 xa_erase_irq(&ep->com.dev->atids, ep->atid); 3455fail5: 3456 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid); 3457fail2: 3458 skb_queue_purge(&ep->com.ep_skb_list); 3459 deref_cm_id(&ep->com); 3460fail1: 3461 c4iw_put_ep(&ep->com); 3462out: 3463 return err; 3464} 3465 3466static int create_server6(struct c4iw_dev *dev, struct c4iw_listen_ep *ep) 3467{ 3468 int err; 3469 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) 3470 &ep->com.local_addr; 3471 3472 if (ipv6_addr_type(&sin6->sin6_addr) != IPV6_ADDR_ANY) { 3473 err = cxgb4_clip_get(ep->com.dev->rdev.lldi.ports[0], 3474 (const u32 *)&sin6->sin6_addr.s6_addr, 1); 3475 if (err) 3476 return err; 3477 } 3478 c4iw_init_wr_wait(ep->com.wr_waitp); 3479 err = cxgb4_create_server6(ep->com.dev->rdev.lldi.ports[0], 3480 ep->stid, &sin6->sin6_addr, 3481 sin6->sin6_port, 3482 ep->com.dev->rdev.lldi.rxq_ids[0]); 3483 if (!err) 3484 err = c4iw_wait_for_reply(&ep->com.dev->rdev, 3485 ep->com.wr_waitp, 3486 0, 0, __func__); 3487 else if (err > 0) 3488 err = net_xmit_errno(err); 3489 if (err) { 3490 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0], 3491 (const u32 *)&sin6->sin6_addr.s6_addr, 1); 3492 pr_err("cxgb4_create_server6/filter failed err %d stid %d laddr %pI6 lport %d\n", 3493 err, ep->stid, 3494 sin6->sin6_addr.s6_addr, ntohs(sin6->sin6_port)); 3495 } 3496 return err; 3497} 3498 3499static int create_server4(struct c4iw_dev *dev, struct c4iw_listen_ep *ep) 3500{ 3501 int err; 3502 struct sockaddr_in *sin = (struct sockaddr_in *) 3503 &ep->com.local_addr; 3504 3505 if (dev->rdev.lldi.enable_fw_ofld_conn) { 3506 do { 3507 err = cxgb4_create_server_filter( 3508 ep->com.dev->rdev.lldi.ports[0], ep->stid, 3509 sin->sin_addr.s_addr, sin->sin_port, 0, 3510 ep->com.dev->rdev.lldi.rxq_ids[0], 0, 0); 3511 if (err == -EBUSY) { 3512 if (c4iw_fatal_error(&ep->com.dev->rdev)) { 3513 err = -EIO; 3514 break; 3515 } 3516 set_current_state(TASK_UNINTERRUPTIBLE); 3517 schedule_timeout(usecs_to_jiffies(100)); 3518 } 3519 } while (err == -EBUSY); 3520 } else { 3521 c4iw_init_wr_wait(ep->com.wr_waitp); 3522 err = cxgb4_create_server(ep->com.dev->rdev.lldi.ports[0], 3523 ep->stid, sin->sin_addr.s_addr, sin->sin_port, 3524 0, ep->com.dev->rdev.lldi.rxq_ids[0]); 3525 if (!err) 3526 err = c4iw_wait_for_reply(&ep->com.dev->rdev, 3527 ep->com.wr_waitp, 3528 0, 0, __func__); 3529 else if (err > 0) 3530 err = net_xmit_errno(err); 3531 } 3532 if (err) 3533 pr_err("cxgb4_create_server/filter failed err %d stid %d laddr %pI4 lport %d\n" 3534 , err, ep->stid, 3535 &sin->sin_addr, ntohs(sin->sin_port)); 3536 return err; 3537} 3538 3539int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog) 3540{ 3541 int err = 0; 3542 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device); 3543 struct c4iw_listen_ep *ep; 3544 3545 might_sleep(); 3546 3547 ep = alloc_ep(sizeof(*ep), GFP_KERNEL); 3548 if (!ep) { 3549 pr_err("%s - cannot alloc ep\n", __func__); 3550 err = -ENOMEM; 3551 goto fail1; 3552 } 3553 skb_queue_head_init(&ep->com.ep_skb_list); 3554 pr_debug("ep %p\n", ep); 3555 ep->com.cm_id = cm_id; 3556 ref_cm_id(&ep->com); 3557 ep->com.dev = dev; 3558 ep->backlog = backlog; 3559 memcpy(&ep->com.local_addr, &cm_id->m_local_addr, 3560 sizeof(ep->com.local_addr)); 3561 3562 /* 3563 * Allocate a server TID. 3564 */ 3565 if (dev->rdev.lldi.enable_fw_ofld_conn && 3566 ep->com.local_addr.ss_family == AF_INET) 3567 ep->stid = cxgb4_alloc_sftid(dev->rdev.lldi.tids, 3568 cm_id->m_local_addr.ss_family, ep); 3569 else 3570 ep->stid = cxgb4_alloc_stid(dev->rdev.lldi.tids, 3571 cm_id->m_local_addr.ss_family, ep); 3572 3573 if (ep->stid == -1) { 3574 pr_err("%s - cannot alloc stid\n", __func__); 3575 err = -ENOMEM; 3576 goto fail2; 3577 } 3578 err = xa_insert_irq(&dev->stids, ep->stid, ep, GFP_KERNEL); 3579 if (err) 3580 goto fail3; 3581 3582 state_set(&ep->com, LISTEN); 3583 if (ep->com.local_addr.ss_family == AF_INET) 3584 err = create_server4(dev, ep); 3585 else 3586 err = create_server6(dev, ep); 3587 if (!err) { 3588 cm_id->provider_data = ep; 3589 goto out; 3590 } 3591 xa_erase_irq(&ep->com.dev->stids, ep->stid); 3592fail3: 3593 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid, 3594 ep->com.local_addr.ss_family); 3595fail2: 3596 deref_cm_id(&ep->com); 3597 c4iw_put_ep(&ep->com); 3598fail1: 3599out: 3600 return err; 3601} 3602 3603int c4iw_destroy_listen(struct iw_cm_id *cm_id) 3604{ 3605 int err; 3606 struct c4iw_listen_ep *ep = to_listen_ep(cm_id); 3607 3608 pr_debug("ep %p\n", ep); 3609 3610 might_sleep(); 3611 state_set(&ep->com, DEAD); 3612 if (ep->com.dev->rdev.lldi.enable_fw_ofld_conn && 3613 ep->com.local_addr.ss_family == AF_INET) { 3614 err = cxgb4_remove_server_filter( 3615 ep->com.dev->rdev.lldi.ports[0], ep->stid, 3616 ep->com.dev->rdev.lldi.rxq_ids[0], false); 3617 } else { 3618 struct sockaddr_in6 *sin6; 3619 c4iw_init_wr_wait(ep->com.wr_waitp); 3620 err = cxgb4_remove_server( 3621 ep->com.dev->rdev.lldi.ports[0], ep->stid, 3622 ep->com.dev->rdev.lldi.rxq_ids[0], 3623 ep->com.local_addr.ss_family == AF_INET6); 3624 if (err) 3625 goto done; 3626 err = c4iw_wait_for_reply(&ep->com.dev->rdev, ep->com.wr_waitp, 3627 0, 0, __func__); 3628 sin6 = (struct sockaddr_in6 *)&ep->com.local_addr; 3629 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0], 3630 (const u32 *)&sin6->sin6_addr.s6_addr, 1); 3631 } 3632 xa_erase_irq(&ep->com.dev->stids, ep->stid); 3633 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid, 3634 ep->com.local_addr.ss_family); 3635done: 3636 deref_cm_id(&ep->com); 3637 c4iw_put_ep(&ep->com); 3638 return err; 3639} 3640 3641int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp) 3642{ 3643 int ret = 0; 3644 int close = 0; 3645 int fatal = 0; 3646 struct c4iw_rdev *rdev; 3647 3648 mutex_lock(&ep->com.mutex); 3649 3650 pr_debug("ep %p state %s, abrupt %d\n", ep, 3651 states[ep->com.state], abrupt); 3652 3653 /* 3654 * Ref the ep here in case we have fatal errors causing the 3655 * ep to be released and freed. 3656 */ 3657 c4iw_get_ep(&ep->com); 3658 3659 rdev = &ep->com.dev->rdev; 3660 if (c4iw_fatal_error(rdev)) { 3661 fatal = 1; 3662 close_complete_upcall(ep, -EIO); 3663 ep->com.state = DEAD; 3664 } 3665 switch (ep->com.state) { 3666 case MPA_REQ_WAIT: 3667 case MPA_REQ_SENT: 3668 case MPA_REQ_RCVD: 3669 case MPA_REP_SENT: 3670 case FPDU_MODE: 3671 case CONNECTING: 3672 close = 1; 3673 if (abrupt) 3674 ep->com.state = ABORTING; 3675 else { 3676 ep->com.state = CLOSING; 3677 3678 /* 3679 * if we close before we see the fw4_ack() then we fix 3680 * up the timer state since we're reusing it. 3681 */ 3682 if (ep->mpa_skb && 3683 test_bit(STOP_MPA_TIMER, &ep->com.flags)) { 3684 clear_bit(STOP_MPA_TIMER, &ep->com.flags); 3685 stop_ep_timer(ep); 3686 } 3687 start_ep_timer(ep); 3688 } 3689 set_bit(CLOSE_SENT, &ep->com.flags); 3690 break; 3691 case CLOSING: 3692 if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) { 3693 close = 1; 3694 if (abrupt) { 3695 (void)stop_ep_timer(ep); 3696 ep->com.state = ABORTING; 3697 } else 3698 ep->com.state = MORIBUND; 3699 } 3700 break; 3701 case MORIBUND: 3702 case ABORTING: 3703 case DEAD: 3704 pr_debug("ignoring disconnect ep %p state %u\n", 3705 ep, ep->com.state); 3706 break; 3707 default: 3708 WARN_ONCE(1, "Bad endpoint state %u\n", ep->com.state); 3709 break; 3710 } 3711 3712 if (close) { 3713 if (abrupt) { 3714 set_bit(EP_DISC_ABORT, &ep->com.history); 3715 ret = send_abort(ep); 3716 } else { 3717 set_bit(EP_DISC_CLOSE, &ep->com.history); 3718 ret = send_halfclose(ep); 3719 } 3720 if (ret) { 3721 set_bit(EP_DISC_FAIL, &ep->com.history); 3722 if (!abrupt) { 3723 stop_ep_timer(ep); 3724 close_complete_upcall(ep, -EIO); 3725 } 3726 if (ep->com.qp) { 3727 struct c4iw_qp_attributes attrs; 3728 3729 attrs.next_state = C4IW_QP_STATE_ERROR; 3730 ret = c4iw_modify_qp(ep->com.qp->rhp, 3731 ep->com.qp, 3732 C4IW_QP_ATTR_NEXT_STATE, 3733 &attrs, 1); 3734 if (ret) 3735 pr_err("%s - qp <- error failed!\n", 3736 __func__); 3737 } 3738 fatal = 1; 3739 } 3740 } 3741 mutex_unlock(&ep->com.mutex); 3742 c4iw_put_ep(&ep->com); 3743 if (fatal) 3744 release_ep_resources(ep); 3745 return ret; 3746} 3747 3748static void active_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb, 3749 struct cpl_fw6_msg_ofld_connection_wr_rpl *req) 3750{ 3751 struct c4iw_ep *ep; 3752 int atid = be32_to_cpu(req->tid); 3753 3754 ep = (struct c4iw_ep *)lookup_atid(dev->rdev.lldi.tids, 3755 (__force u32) req->tid); 3756 if (!ep) 3757 return; 3758 3759 switch (req->retval) { 3760 case FW_ENOMEM: 3761 set_bit(ACT_RETRY_NOMEM, &ep->com.history); 3762 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) { 3763 send_fw_act_open_req(ep, atid); 3764 return; 3765 } 3766 fallthrough; 3767 case FW_EADDRINUSE: 3768 set_bit(ACT_RETRY_INUSE, &ep->com.history); 3769 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) { 3770 send_fw_act_open_req(ep, atid); 3771 return; 3772 } 3773 break; 3774 default: 3775 pr_info("%s unexpected ofld conn wr retval %d\n", 3776 __func__, req->retval); 3777 break; 3778 } 3779 pr_err("active ofld_connect_wr failure %d atid %d\n", 3780 req->retval, atid); 3781 mutex_lock(&dev->rdev.stats.lock); 3782 dev->rdev.stats.act_ofld_conn_fails++; 3783 mutex_unlock(&dev->rdev.stats.lock); 3784 connect_reply_upcall(ep, status2errno(req->retval)); 3785 state_set(&ep->com, DEAD); 3786 if (ep->com.remote_addr.ss_family == AF_INET6) { 3787 struct sockaddr_in6 *sin6 = 3788 (struct sockaddr_in6 *)&ep->com.local_addr; 3789 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0], 3790 (const u32 *)&sin6->sin6_addr.s6_addr, 1); 3791 } 3792 xa_erase_irq(&dev->atids, atid); 3793 cxgb4_free_atid(dev->rdev.lldi.tids, atid); 3794 dst_release(ep->dst); 3795 cxgb4_l2t_release(ep->l2t); 3796 c4iw_put_ep(&ep->com); 3797} 3798 3799static void passive_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb, 3800 struct cpl_fw6_msg_ofld_connection_wr_rpl *req) 3801{ 3802 struct sk_buff *rpl_skb; 3803 struct cpl_pass_accept_req *cpl; 3804 int ret; 3805 3806 rpl_skb = (struct sk_buff *)(unsigned long)req->cookie; 3807 if (req->retval) { 3808 pr_err("%s passive open failure %d\n", __func__, req->retval); 3809 mutex_lock(&dev->rdev.stats.lock); 3810 dev->rdev.stats.pas_ofld_conn_fails++; 3811 mutex_unlock(&dev->rdev.stats.lock); 3812 kfree_skb(rpl_skb); 3813 } else { 3814 cpl = (struct cpl_pass_accept_req *)cplhdr(rpl_skb); 3815 OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ, 3816 (__force u32) htonl( 3817 (__force u32) req->tid))); 3818 ret = pass_accept_req(dev, rpl_skb); 3819 if (!ret) 3820 kfree_skb(rpl_skb); 3821 } 3822 return; 3823} 3824 3825static inline u64 t4_tcb_get_field64(__be64 *tcb, u16 word) 3826{ 3827 u64 tlo = be64_to_cpu(tcb[((31 - word) / 2)]); 3828 u64 thi = be64_to_cpu(tcb[((31 - word) / 2) - 1]); 3829 u64 t; 3830 u32 shift = 32; 3831 3832 t = (thi << shift) | (tlo >> shift); 3833 3834 return t; 3835} 3836 3837static inline u32 t4_tcb_get_field32(__be64 *tcb, u16 word, u32 mask, u32 shift) 3838{ 3839 u32 v; 3840 u64 t = be64_to_cpu(tcb[(31 - word) / 2]); 3841 3842 if (word & 0x1) 3843 shift += 32; 3844 v = (t >> shift) & mask; 3845 return v; 3846} 3847 3848static int read_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb) 3849{ 3850 struct cpl_get_tcb_rpl *rpl = cplhdr(skb); 3851 __be64 *tcb = (__be64 *)(rpl + 1); 3852 unsigned int tid = GET_TID(rpl); 3853 struct c4iw_ep *ep; 3854 u64 t_flags_64; 3855 u32 rx_pdu_out; 3856 3857 ep = get_ep_from_tid(dev, tid); 3858 if (!ep) 3859 return 0; 3860 /* Examine the TF_RX_PDU_OUT (bit 49 of the t_flags) in order to 3861 * determine if there's a rx PDU feedback event pending. 3862 * 3863 * If that bit is set, it means we'll need to re-read the TCB's 3864 * rq_start value. The final value is the one present in a TCB 3865 * with the TF_RX_PDU_OUT bit cleared. 3866 */ 3867 3868 t_flags_64 = t4_tcb_get_field64(tcb, TCB_T_FLAGS_W); 3869 rx_pdu_out = (t_flags_64 & TF_RX_PDU_OUT_V(1)) >> TF_RX_PDU_OUT_S; 3870 3871 c4iw_put_ep(&ep->com); /* from get_ep_from_tid() */ 3872 c4iw_put_ep(&ep->com); /* from read_tcb() */ 3873 3874 /* If TF_RX_PDU_OUT bit is set, re-read the TCB */ 3875 if (rx_pdu_out) { 3876 if (++ep->rx_pdu_out_cnt >= 2) { 3877 WARN_ONCE(1, "tcb re-read() reached the guard limit, finishing the cleanup\n"); 3878 goto cleanup; 3879 } 3880 read_tcb(ep); 3881 return 0; 3882 } 3883 3884 ep->srqe_idx = t4_tcb_get_field32(tcb, TCB_RQ_START_W, TCB_RQ_START_M, 3885 TCB_RQ_START_S); 3886cleanup: 3887 pr_debug("ep %p tid %u %016x\n", ep, ep->hwtid, ep->srqe_idx); 3888 3889 if (test_bit(PEER_ABORT_IN_PROGRESS, &ep->com.flags)) 3890 finish_peer_abort(dev, ep); 3891 else if (test_bit(ABORT_REQ_IN_PROGRESS, &ep->com.flags)) 3892 send_abort_req(ep); 3893 else 3894 WARN_ONCE(1, "unexpected state!"); 3895 3896 return 0; 3897} 3898 3899static int deferred_fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb) 3900{ 3901 struct cpl_fw6_msg *rpl = cplhdr(skb); 3902 struct cpl_fw6_msg_ofld_connection_wr_rpl *req; 3903 3904 switch (rpl->type) { 3905 case FW6_TYPE_CQE: 3906 c4iw_ev_dispatch(dev, (struct t4_cqe *)&rpl->data[0]); 3907 break; 3908 case FW6_TYPE_OFLD_CONNECTION_WR_RPL: 3909 req = (struct cpl_fw6_msg_ofld_connection_wr_rpl *)rpl->data; 3910 switch (req->t_state) { 3911 case TCP_SYN_SENT: 3912 active_ofld_conn_reply(dev, skb, req); 3913 break; 3914 case TCP_SYN_RECV: 3915 passive_ofld_conn_reply(dev, skb, req); 3916 break; 3917 default: 3918 pr_err("%s unexpected ofld conn wr state %d\n", 3919 __func__, req->t_state); 3920 break; 3921 } 3922 break; 3923 } 3924 return 0; 3925} 3926 3927static void build_cpl_pass_accept_req(struct sk_buff *skb, int stid , u8 tos) 3928{ 3929 __be32 l2info; 3930 __be16 hdr_len, vlantag, len; 3931 u16 eth_hdr_len; 3932 int tcp_hdr_len, ip_hdr_len; 3933 u8 intf; 3934 struct cpl_rx_pkt *cpl = cplhdr(skb); 3935 struct cpl_pass_accept_req *req; 3936 struct tcp_options_received tmp_opt; 3937 struct c4iw_dev *dev; 3938 enum chip_type type; 3939 3940 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *))); 3941 /* Store values from cpl_rx_pkt in temporary location. */ 3942 vlantag = cpl->vlan; 3943 len = cpl->len; 3944 l2info = cpl->l2info; 3945 hdr_len = cpl->hdr_len; 3946 intf = cpl->iff; 3947 3948 __skb_pull(skb, sizeof(*req) + sizeof(struct rss_header)); 3949 3950 /* 3951 * We need to parse the TCP options from SYN packet. 3952 * to generate cpl_pass_accept_req. 3953 */ 3954 memset(&tmp_opt, 0, sizeof(tmp_opt)); 3955 tcp_clear_options(&tmp_opt); 3956 tcp_parse_options(&init_net, skb, &tmp_opt, 0, NULL); 3957 3958 req = __skb_push(skb, sizeof(*req)); 3959 memset(req, 0, sizeof(*req)); 3960 req->l2info = cpu_to_be16(SYN_INTF_V(intf) | 3961 SYN_MAC_IDX_V(RX_MACIDX_G( 3962 be32_to_cpu(l2info))) | 3963 SYN_XACT_MATCH_F); 3964 type = dev->rdev.lldi.adapter_type; 3965 tcp_hdr_len = RX_TCPHDR_LEN_G(be16_to_cpu(hdr_len)); 3966 ip_hdr_len = RX_IPHDR_LEN_G(be16_to_cpu(hdr_len)); 3967 req->hdr_len = 3968 cpu_to_be32(SYN_RX_CHAN_V(RX_CHAN_G(be32_to_cpu(l2info)))); 3969 if (CHELSIO_CHIP_VERSION(type) <= CHELSIO_T5) { 3970 eth_hdr_len = is_t4(type) ? 3971 RX_ETHHDR_LEN_G(be32_to_cpu(l2info)) : 3972 RX_T5_ETHHDR_LEN_G(be32_to_cpu(l2info)); 3973 req->hdr_len |= cpu_to_be32(TCP_HDR_LEN_V(tcp_hdr_len) | 3974 IP_HDR_LEN_V(ip_hdr_len) | 3975 ETH_HDR_LEN_V(eth_hdr_len)); 3976 } else { /* T6 and later */ 3977 eth_hdr_len = RX_T6_ETHHDR_LEN_G(be32_to_cpu(l2info)); 3978 req->hdr_len |= cpu_to_be32(T6_TCP_HDR_LEN_V(tcp_hdr_len) | 3979 T6_IP_HDR_LEN_V(ip_hdr_len) | 3980 T6_ETH_HDR_LEN_V(eth_hdr_len)); 3981 } 3982 req->vlan = vlantag; 3983 req->len = len; 3984 req->tos_stid = cpu_to_be32(PASS_OPEN_TID_V(stid) | 3985 PASS_OPEN_TOS_V(tos)); 3986 req->tcpopt.mss = htons(tmp_opt.mss_clamp); 3987 if (tmp_opt.wscale_ok) 3988 req->tcpopt.wsf = tmp_opt.snd_wscale; 3989 req->tcpopt.tstamp = tmp_opt.saw_tstamp; 3990 if (tmp_opt.sack_ok) 3991 req->tcpopt.sack = 1; 3992 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ, 0)); 3993 return; 3994} 3995 3996static void send_fw_pass_open_req(struct c4iw_dev *dev, struct sk_buff *skb, 3997 __be32 laddr, __be16 lport, 3998 __be32 raddr, __be16 rport, 3999 u32 rcv_isn, u32 filter, u16 window, 4000 u32 rss_qid, u8 port_id) 4001{ 4002 struct sk_buff *req_skb; 4003 struct fw_ofld_connection_wr *req; 4004 struct cpl_pass_accept_req *cpl = cplhdr(skb); 4005 int ret; 4006 4007 req_skb = alloc_skb(sizeof(struct fw_ofld_connection_wr), GFP_KERNEL); 4008 if (!req_skb) 4009 return; 4010 req = __skb_put_zero(req_skb, sizeof(*req)); 4011 req->op_compl = htonl(WR_OP_V(FW_OFLD_CONNECTION_WR) | FW_WR_COMPL_F); 4012 req->len16_pkd = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*req), 16))); 4013 req->le.version_cpl = htonl(FW_OFLD_CONNECTION_WR_CPL_F); 4014 req->le.filter = (__force __be32) filter; 4015 req->le.lport = lport; 4016 req->le.pport = rport; 4017 req->le.u.ipv4.lip = laddr; 4018 req->le.u.ipv4.pip = raddr; 4019 req->tcb.rcv_nxt = htonl(rcv_isn + 1); 4020 req->tcb.rcv_adv = htons(window); 4021 req->tcb.t_state_to_astid = 4022 htonl(FW_OFLD_CONNECTION_WR_T_STATE_V(TCP_SYN_RECV) | 4023 FW_OFLD_CONNECTION_WR_RCV_SCALE_V(cpl->tcpopt.wsf) | 4024 FW_OFLD_CONNECTION_WR_ASTID_V( 4025 PASS_OPEN_TID_G(ntohl(cpl->tos_stid)))); 4026 4027 /* 4028 * We store the qid in opt2 which will be used by the firmware 4029 * to send us the wr response. 4030 */ 4031 req->tcb.opt2 = htonl(RSS_QUEUE_V(rss_qid)); 4032 4033 /* 4034 * We initialize the MSS index in TCB to 0xF. 4035 * So that when driver sends cpl_pass_accept_rpl 4036 * TCB picks up the correct value. If this was 0 4037 * TP will ignore any value > 0 for MSS index. 4038 */ 4039 req->tcb.opt0 = cpu_to_be64(MSS_IDX_V(0xF)); 4040 req->cookie = (uintptr_t)skb; 4041 4042 set_wr_txq(req_skb, CPL_PRIORITY_CONTROL, port_id); 4043 ret = cxgb4_ofld_send(dev->rdev.lldi.ports[0], req_skb); 4044 if (ret < 0) { 4045 pr_err("%s - cxgb4_ofld_send error %d - dropping\n", __func__, 4046 ret); 4047 kfree_skb(skb); 4048 kfree_skb(req_skb); 4049 } 4050} 4051 4052/* 4053 * Handler for CPL_RX_PKT message. Need to handle cpl_rx_pkt 4054 * messages when a filter is being used instead of server to 4055 * redirect a syn packet. When packets hit filter they are redirected 4056 * to the offload queue and driver tries to establish the connection 4057 * using firmware work request. 4058 */ 4059static int rx_pkt(struct c4iw_dev *dev, struct sk_buff *skb) 4060{ 4061 int stid; 4062 unsigned int filter; 4063 struct ethhdr *eh = NULL; 4064 struct vlan_ethhdr *vlan_eh = NULL; 4065 struct iphdr *iph; 4066 struct tcphdr *tcph; 4067 struct rss_header *rss = (void *)skb->data; 4068 struct cpl_rx_pkt *cpl = (void *)skb->data; 4069 struct cpl_pass_accept_req *req = (void *)(rss + 1); 4070 struct l2t_entry *e; 4071 struct dst_entry *dst; 4072 struct c4iw_ep *lep = NULL; 4073 u16 window; 4074 struct port_info *pi; 4075 struct net_device *pdev; 4076 u16 rss_qid, eth_hdr_len; 4077 int step; 4078 struct neighbour *neigh; 4079 4080 /* Drop all non-SYN packets */ 4081 if (!(cpl->l2info & cpu_to_be32(RXF_SYN_F))) 4082 goto reject; 4083 4084 /* 4085 * Drop all packets which did not hit the filter. 4086 * Unlikely to happen. 4087 */ 4088 if (!(rss->filter_hit && rss->filter_tid)) 4089 goto reject; 4090 4091 /* 4092 * Calculate the server tid from filter hit index from cpl_rx_pkt. 4093 */ 4094 stid = (__force int) cpu_to_be32((__force u32) rss->hash_val); 4095 4096 lep = (struct c4iw_ep *)get_ep_from_stid(dev, stid); 4097 if (!lep) { 4098 pr_warn("%s connect request on invalid stid %d\n", 4099 __func__, stid); 4100 goto reject; 4101 } 4102 4103 switch (CHELSIO_CHIP_VERSION(dev->rdev.lldi.adapter_type)) { 4104 case CHELSIO_T4: 4105 eth_hdr_len = RX_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info)); 4106 break; 4107 case CHELSIO_T5: 4108 eth_hdr_len = RX_T5_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info)); 4109 break; 4110 case CHELSIO_T6: 4111 eth_hdr_len = RX_T6_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info)); 4112 break; 4113 default: 4114 pr_err("T%d Chip is not supported\n", 4115 CHELSIO_CHIP_VERSION(dev->rdev.lldi.adapter_type)); 4116 goto reject; 4117 } 4118 4119 if (eth_hdr_len == ETH_HLEN) { 4120 eh = (struct ethhdr *)(req + 1); 4121 iph = (struct iphdr *)(eh + 1); 4122 } else { 4123 vlan_eh = (struct vlan_ethhdr *)(req + 1); 4124 iph = (struct iphdr *)(vlan_eh + 1); 4125 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), ntohs(cpl->vlan)); 4126 } 4127 4128 if (iph->version != 0x4) 4129 goto reject; 4130 4131 tcph = (struct tcphdr *)(iph + 1); 4132 skb_set_network_header(skb, (void *)iph - (void *)rss); 4133 skb_set_transport_header(skb, (void *)tcph - (void *)rss); 4134 skb_get(skb); 4135 4136 pr_debug("lip 0x%x lport %u pip 0x%x pport %u tos %d\n", 4137 ntohl(iph->daddr), ntohs(tcph->dest), ntohl(iph->saddr), 4138 ntohs(tcph->source), iph->tos); 4139 4140 dst = cxgb_find_route(&dev->rdev.lldi, get_real_dev, 4141 iph->daddr, iph->saddr, tcph->dest, 4142 tcph->source, iph->tos); 4143 if (!dst) { 4144 pr_err("%s - failed to find dst entry!\n", __func__); 4145 goto reject; 4146 } 4147 neigh = dst_neigh_lookup_skb(dst, skb); 4148 4149 if (!neigh) { 4150 pr_err("%s - failed to allocate neigh!\n", __func__); 4151 goto free_dst; 4152 } 4153 4154 if (neigh->dev->flags & IFF_LOOPBACK) { 4155 pdev = ip_dev_find(&init_net, iph->daddr); 4156 e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh, 4157 pdev, 0); 4158 pi = (struct port_info *)netdev_priv(pdev); 4159 dev_put(pdev); 4160 } else { 4161 pdev = get_real_dev(neigh->dev); 4162 e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh, 4163 pdev, 0); 4164 pi = (struct port_info *)netdev_priv(pdev); 4165 } 4166 neigh_release(neigh); 4167 if (!e) { 4168 pr_err("%s - failed to allocate l2t entry!\n", 4169 __func__); 4170 goto free_dst; 4171 } 4172 4173 step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan; 4174 rss_qid = dev->rdev.lldi.rxq_ids[pi->port_id * step]; 4175 window = (__force u16) htons((__force u16)tcph->window); 4176 4177 /* Calcuate filter portion for LE region. */ 4178 filter = (__force unsigned int) cpu_to_be32(cxgb4_select_ntuple( 4179 dev->rdev.lldi.ports[0], 4180 e)); 4181 4182 /* 4183 * Synthesize the cpl_pass_accept_req. We have everything except the 4184 * TID. Once firmware sends a reply with TID we update the TID field 4185 * in cpl and pass it through the regular cpl_pass_accept_req path. 4186 */ 4187 build_cpl_pass_accept_req(skb, stid, iph->tos); 4188 send_fw_pass_open_req(dev, skb, iph->daddr, tcph->dest, iph->saddr, 4189 tcph->source, ntohl(tcph->seq), filter, window, 4190 rss_qid, pi->port_id); 4191 cxgb4_l2t_release(e); 4192free_dst: 4193 dst_release(dst); 4194reject: 4195 if (lep) 4196 c4iw_put_ep(&lep->com); 4197 return 0; 4198} 4199 4200/* 4201 * These are the real handlers that are called from a 4202 * work queue. 4203 */ 4204static c4iw_handler_func work_handlers[NUM_CPL_CMDS + NUM_FAKE_CPLS] = { 4205 [CPL_ACT_ESTABLISH] = act_establish, 4206 [CPL_ACT_OPEN_RPL] = act_open_rpl, 4207 [CPL_RX_DATA] = rx_data, 4208 [CPL_ABORT_RPL_RSS] = abort_rpl, 4209 [CPL_ABORT_RPL] = abort_rpl, 4210 [CPL_PASS_OPEN_RPL] = pass_open_rpl, 4211 [CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl, 4212 [CPL_PASS_ACCEPT_REQ] = pass_accept_req, 4213 [CPL_PASS_ESTABLISH] = pass_establish, 4214 [CPL_PEER_CLOSE] = peer_close, 4215 [CPL_ABORT_REQ_RSS] = peer_abort, 4216 [CPL_CLOSE_CON_RPL] = close_con_rpl, 4217 [CPL_RDMA_TERMINATE] = terminate, 4218 [CPL_FW4_ACK] = fw4_ack, 4219 [CPL_GET_TCB_RPL] = read_tcb_rpl, 4220 [CPL_FW6_MSG] = deferred_fw6_msg, 4221 [CPL_RX_PKT] = rx_pkt, 4222 [FAKE_CPL_PUT_EP_SAFE] = _put_ep_safe, 4223 [FAKE_CPL_PASS_PUT_EP_SAFE] = _put_pass_ep_safe 4224}; 4225 4226static void process_timeout(struct c4iw_ep *ep) 4227{ 4228 struct c4iw_qp_attributes attrs; 4229 int abort = 1; 4230 4231 mutex_lock(&ep->com.mutex); 4232 pr_debug("ep %p tid %u state %d\n", ep, ep->hwtid, ep->com.state); 4233 set_bit(TIMEDOUT, &ep->com.history); 4234 switch (ep->com.state) { 4235 case MPA_REQ_SENT: 4236 connect_reply_upcall(ep, -ETIMEDOUT); 4237 break; 4238 case MPA_REQ_WAIT: 4239 case MPA_REQ_RCVD: 4240 case MPA_REP_SENT: 4241 case FPDU_MODE: 4242 break; 4243 case CLOSING: 4244 case MORIBUND: 4245 if (ep->com.cm_id && ep->com.qp) { 4246 attrs.next_state = C4IW_QP_STATE_ERROR; 4247 c4iw_modify_qp(ep->com.qp->rhp, 4248 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE, 4249 &attrs, 1); 4250 } 4251 close_complete_upcall(ep, -ETIMEDOUT); 4252 break; 4253 case ABORTING: 4254 case DEAD: 4255 4256 /* 4257 * These states are expected if the ep timed out at the same 4258 * time as another thread was calling stop_ep_timer(). 4259 * So we silently do nothing for these states. 4260 */ 4261 abort = 0; 4262 break; 4263 default: 4264 WARN(1, "%s unexpected state ep %p tid %u state %u\n", 4265 __func__, ep, ep->hwtid, ep->com.state); 4266 abort = 0; 4267 } 4268 mutex_unlock(&ep->com.mutex); 4269 if (abort) 4270 c4iw_ep_disconnect(ep, 1, GFP_KERNEL); 4271 c4iw_put_ep(&ep->com); 4272} 4273 4274static void process_timedout_eps(void) 4275{ 4276 struct c4iw_ep *ep; 4277 4278 spin_lock_irq(&timeout_lock); 4279 while (!list_empty(&timeout_list)) { 4280 struct list_head *tmp; 4281 4282 tmp = timeout_list.next; 4283 list_del(tmp); 4284 tmp->next = NULL; 4285 tmp->prev = NULL; 4286 spin_unlock_irq(&timeout_lock); 4287 ep = list_entry(tmp, struct c4iw_ep, entry); 4288 process_timeout(ep); 4289 spin_lock_irq(&timeout_lock); 4290 } 4291 spin_unlock_irq(&timeout_lock); 4292} 4293 4294static void process_work(struct work_struct *work) 4295{ 4296 struct sk_buff *skb = NULL; 4297 struct c4iw_dev *dev; 4298 struct cpl_act_establish *rpl; 4299 unsigned int opcode; 4300 int ret; 4301 4302 process_timedout_eps(); 4303 while ((skb = skb_dequeue(&rxq))) { 4304 rpl = cplhdr(skb); 4305 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *))); 4306 opcode = rpl->ot.opcode; 4307 4308 if (opcode >= ARRAY_SIZE(work_handlers) || 4309 !work_handlers[opcode]) { 4310 pr_err("No handler for opcode 0x%x.\n", opcode); 4311 kfree_skb(skb); 4312 } else { 4313 ret = work_handlers[opcode](dev, skb); 4314 if (!ret) 4315 kfree_skb(skb); 4316 } 4317 process_timedout_eps(); 4318 } 4319} 4320 4321static DECLARE_WORK(skb_work, process_work); 4322 4323static void ep_timeout(struct timer_list *t) 4324{ 4325 struct c4iw_ep *ep = from_timer(ep, t, timer); 4326 int kickit = 0; 4327 4328 spin_lock(&timeout_lock); 4329 if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) { 4330 /* 4331 * Only insert if it is not already on the list. 4332 */ 4333 if (!ep->entry.next) { 4334 list_add_tail(&ep->entry, &timeout_list); 4335 kickit = 1; 4336 } 4337 } 4338 spin_unlock(&timeout_lock); 4339 if (kickit) 4340 queue_work(workq, &skb_work); 4341} 4342 4343/* 4344 * All the CM events are handled on a work queue to have a safe context. 4345 */ 4346static int sched(struct c4iw_dev *dev, struct sk_buff *skb) 4347{ 4348 4349 /* 4350 * Save dev in the skb->cb area. 4351 */ 4352 *((struct c4iw_dev **) (skb->cb + sizeof(void *))) = dev; 4353 4354 /* 4355 * Queue the skb and schedule the worker thread. 4356 */ 4357 skb_queue_tail(&rxq, skb); 4358 queue_work(workq, &skb_work); 4359 return 0; 4360} 4361 4362static int set_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb) 4363{ 4364 struct cpl_set_tcb_rpl *rpl = cplhdr(skb); 4365 4366 if (rpl->status != CPL_ERR_NONE) { 4367 pr_err("Unexpected SET_TCB_RPL status %u for tid %u\n", 4368 rpl->status, GET_TID(rpl)); 4369 } 4370 kfree_skb(skb); 4371 return 0; 4372} 4373 4374static int fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb) 4375{ 4376 struct cpl_fw6_msg *rpl = cplhdr(skb); 4377 struct c4iw_wr_wait *wr_waitp; 4378 int ret; 4379 4380 pr_debug("type %u\n", rpl->type); 4381 4382 switch (rpl->type) { 4383 case FW6_TYPE_WR_RPL: 4384 ret = (int)((be64_to_cpu(rpl->data[0]) >> 8) & 0xff); 4385 wr_waitp = (struct c4iw_wr_wait *)(__force unsigned long) rpl->data[1]; 4386 pr_debug("wr_waitp %p ret %u\n", wr_waitp, ret); 4387 if (wr_waitp) 4388 c4iw_wake_up_deref(wr_waitp, ret ? -ret : 0); 4389 kfree_skb(skb); 4390 break; 4391 case FW6_TYPE_CQE: 4392 case FW6_TYPE_OFLD_CONNECTION_WR_RPL: 4393 sched(dev, skb); 4394 break; 4395 default: 4396 pr_err("%s unexpected fw6 msg type %u\n", 4397 __func__, rpl->type); 4398 kfree_skb(skb); 4399 break; 4400 } 4401 return 0; 4402} 4403 4404static int peer_abort_intr(struct c4iw_dev *dev, struct sk_buff *skb) 4405{ 4406 struct cpl_abort_req_rss *req = cplhdr(skb); 4407 struct c4iw_ep *ep; 4408 unsigned int tid = GET_TID(req); 4409 4410 ep = get_ep_from_tid(dev, tid); 4411 /* This EP will be dereferenced in peer_abort() */ 4412 if (!ep) { 4413 pr_warn("Abort on non-existent endpoint, tid %d\n", tid); 4414 kfree_skb(skb); 4415 return 0; 4416 } 4417 if (cxgb_is_neg_adv(req->status)) { 4418 pr_debug("Negative advice on abort- tid %u status %d (%s)\n", 4419 ep->hwtid, req->status, 4420 neg_adv_str(req->status)); 4421 goto out; 4422 } 4423 pr_debug("ep %p tid %u state %u\n", ep, ep->hwtid, ep->com.state); 4424 4425 c4iw_wake_up_noref(ep->com.wr_waitp, -ECONNRESET); 4426out: 4427 sched(dev, skb); 4428 return 0; 4429} 4430 4431/* 4432 * Most upcalls from the T4 Core go to sched() to 4433 * schedule the processing on a work queue. 4434 */ 4435c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS] = { 4436 [CPL_ACT_ESTABLISH] = sched, 4437 [CPL_ACT_OPEN_RPL] = sched, 4438 [CPL_RX_DATA] = sched, 4439 [CPL_ABORT_RPL_RSS] = sched, 4440 [CPL_ABORT_RPL] = sched, 4441 [CPL_PASS_OPEN_RPL] = sched, 4442 [CPL_CLOSE_LISTSRV_RPL] = sched, 4443 [CPL_PASS_ACCEPT_REQ] = sched, 4444 [CPL_PASS_ESTABLISH] = sched, 4445 [CPL_PEER_CLOSE] = sched, 4446 [CPL_CLOSE_CON_RPL] = sched, 4447 [CPL_ABORT_REQ_RSS] = peer_abort_intr, 4448 [CPL_RDMA_TERMINATE] = sched, 4449 [CPL_FW4_ACK] = sched, 4450 [CPL_SET_TCB_RPL] = set_tcb_rpl, 4451 [CPL_GET_TCB_RPL] = sched, 4452 [CPL_FW6_MSG] = fw6_msg, 4453 [CPL_RX_PKT] = sched 4454}; 4455 4456int __init c4iw_cm_init(void) 4457{ 4458 spin_lock_init(&timeout_lock); 4459 skb_queue_head_init(&rxq); 4460 4461 workq = alloc_ordered_workqueue("iw_cxgb4", WQ_MEM_RECLAIM); 4462 if (!workq) 4463 return -ENOMEM; 4464 4465 return 0; 4466} 4467 4468void c4iw_cm_term(void) 4469{ 4470 WARN_ON(!list_empty(&timeout_list)); 4471 flush_workqueue(workq); 4472 destroy_workqueue(workq); 4473} 4474