1 /* 2 * Copyright (c) 2016 Chelsio Communications, Inc. 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License version 2 as 6 * published by the Free Software Foundation. 7 */ 8 9 #include <linux/module.h> 10 #include <linux/list.h> 11 #include <linux/workqueue.h> 12 #include <linux/skbuff.h> 13 #include <linux/timer.h> 14 #include <linux/notifier.h> 15 #include <linux/inetdevice.h> 16 #include <linux/ip.h> 17 #include <linux/tcp.h> 18 #include <linux/if_vlan.h> 19 20 #include <net/neighbour.h> 21 #include <net/netevent.h> 22 #include <net/route.h> 23 #include <net/tcp.h> 24 #include <net/ip6_route.h> 25 #include <net/addrconf.h> 26 27 #include <libcxgb_cm.h> 28 #include "cxgbit.h" 29 #include "clip_tbl.h" 30 31 static void cxgbit_init_wr_wait(struct cxgbit_wr_wait *wr_waitp) 32 { 33 wr_waitp->ret = 0; 34 reinit_completion(&wr_waitp->completion); 35 } 36 37 static void 38 cxgbit_wake_up(struct cxgbit_wr_wait *wr_waitp, const char *func, u8 ret) 39 { 40 if (ret == CPL_ERR_NONE) 41 wr_waitp->ret = 0; 42 else 43 wr_waitp->ret = -EIO; 44 45 if (wr_waitp->ret) 46 pr_err("%s: err:%u", func, ret); 47 48 complete(&wr_waitp->completion); 49 } 50 51 static int 52 cxgbit_wait_for_reply(struct cxgbit_device *cdev, 53 struct cxgbit_wr_wait *wr_waitp, u32 tid, u32 timeout, 54 const char *func) 55 { 56 int ret; 57 58 if (!test_bit(CDEV_STATE_UP, &cdev->flags)) { 59 wr_waitp->ret = -EIO; 60 goto out; 61 } 62 63 ret = wait_for_completion_timeout(&wr_waitp->completion, timeout * HZ); 64 if (!ret) { 65 pr_info("%s - Device %s not responding tid %u\n", 66 func, pci_name(cdev->lldi.pdev), tid); 67 wr_waitp->ret = -ETIMEDOUT; 68 } 69 out: 70 if (wr_waitp->ret) 71 pr_info("%s: FW reply %d tid %u\n", 72 pci_name(cdev->lldi.pdev), wr_waitp->ret, tid); 73 return wr_waitp->ret; 74 } 75 76 static int cxgbit_np_hashfn(const struct cxgbit_np *cnp) 77 { 78 return ((unsigned long)cnp >> 10) & (NP_INFO_HASH_SIZE - 1); 79 } 80 81 static struct np_info * 82 cxgbit_np_hash_add(struct cxgbit_device *cdev, struct cxgbit_np *cnp, 83 unsigned int stid) 84 { 85 struct np_info *p = kzalloc(sizeof(*p), GFP_KERNEL); 86 87 if (p) { 88 int bucket = cxgbit_np_hashfn(cnp); 89 90 p->cnp = cnp; 91 p->stid = stid; 92 spin_lock(&cdev->np_lock); 93 p->next = cdev->np_hash_tab[bucket]; 94 cdev->np_hash_tab[bucket] = p; 95 spin_unlock(&cdev->np_lock); 96 } 97 98 return p; 99 } 100 101 static int 102 cxgbit_np_hash_find(struct cxgbit_device *cdev, struct cxgbit_np *cnp) 103 { 104 int stid = -1, bucket = cxgbit_np_hashfn(cnp); 105 struct np_info *p; 106 107 spin_lock(&cdev->np_lock); 108 for (p = cdev->np_hash_tab[bucket]; p; p = p->next) { 109 if (p->cnp == cnp) { 110 stid = p->stid; 111 break; 112 } 113 } 114 spin_unlock(&cdev->np_lock); 115 116 return stid; 117 } 118 119 static int cxgbit_np_hash_del(struct cxgbit_device *cdev, struct cxgbit_np *cnp) 120 { 121 int stid = -1, bucket = cxgbit_np_hashfn(cnp); 122 struct np_info *p, **prev = &cdev->np_hash_tab[bucket]; 123 124 spin_lock(&cdev->np_lock); 125 for (p = *prev; p; prev = &p->next, p = p->next) { 126 if (p->cnp == cnp) { 127 stid = p->stid; 128 *prev = p->next; 129 kfree(p); 130 break; 131 } 132 } 133 spin_unlock(&cdev->np_lock); 134 135 return stid; 136 } 137 138 void _cxgbit_free_cnp(struct kref *kref) 139 { 140 struct cxgbit_np *cnp; 141 142 cnp = container_of(kref, struct cxgbit_np, kref); 143 kfree(cnp); 144 } 145 146 static int 147 cxgbit_create_server6(struct cxgbit_device *cdev, unsigned int stid, 148 struct cxgbit_np *cnp) 149 { 150 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) 151 &cnp->com.local_addr; 152 int addr_type; 153 int ret; 154 155 pr_debug("%s: dev = %s; stid = %u; sin6_port = %u\n", 156 __func__, cdev->lldi.ports[0]->name, stid, sin6->sin6_port); 157 158 addr_type = ipv6_addr_type((const struct in6_addr *) 159 &sin6->sin6_addr); 160 if (addr_type != IPV6_ADDR_ANY) { 161 ret = cxgb4_clip_get(cdev->lldi.ports[0], 162 (const u32 *)&sin6->sin6_addr.s6_addr, 1); 163 if (ret) { 164 pr_err("Unable to find clip table entry. laddr %pI6. Error:%d.\n", 165 sin6->sin6_addr.s6_addr, ret); 166 return -ENOMEM; 167 } 168 } 169 170 cxgbit_get_cnp(cnp); 171 cxgbit_init_wr_wait(&cnp->com.wr_wait); 172 173 ret = cxgb4_create_server6(cdev->lldi.ports[0], 174 stid, &sin6->sin6_addr, 175 sin6->sin6_port, 176 cdev->lldi.rxq_ids[0]); 177 if (!ret) 178 ret = cxgbit_wait_for_reply(cdev, &cnp->com.wr_wait, 179 0, 10, __func__); 180 else if (ret > 0) 181 ret = net_xmit_errno(ret); 182 else 183 cxgbit_put_cnp(cnp); 184 185 if (ret) { 186 if (ret != -ETIMEDOUT) 187 cxgb4_clip_release(cdev->lldi.ports[0], 188 (const u32 *)&sin6->sin6_addr.s6_addr, 1); 189 190 pr_err("create server6 err %d stid %d laddr %pI6 lport %d\n", 191 ret, stid, sin6->sin6_addr.s6_addr, 192 ntohs(sin6->sin6_port)); 193 } 194 195 return ret; 196 } 197 198 static int 199 cxgbit_create_server4(struct cxgbit_device *cdev, unsigned int stid, 200 struct cxgbit_np *cnp) 201 { 202 struct sockaddr_in *sin = (struct sockaddr_in *) 203 &cnp->com.local_addr; 204 int ret; 205 206 pr_debug("%s: dev = %s; stid = %u; sin_port = %u\n", 207 __func__, cdev->lldi.ports[0]->name, stid, sin->sin_port); 208 209 cxgbit_get_cnp(cnp); 210 cxgbit_init_wr_wait(&cnp->com.wr_wait); 211 212 ret = cxgb4_create_server(cdev->lldi.ports[0], 213 stid, sin->sin_addr.s_addr, 214 sin->sin_port, 0, 215 cdev->lldi.rxq_ids[0]); 216 if (!ret) 217 ret = cxgbit_wait_for_reply(cdev, 218 &cnp->com.wr_wait, 219 0, 10, __func__); 220 else if (ret > 0) 221 ret = net_xmit_errno(ret); 222 else 223 cxgbit_put_cnp(cnp); 224 225 if (ret) 226 pr_err("create server failed err %d stid %d laddr %pI4 lport %d\n", 227 ret, stid, &sin->sin_addr, ntohs(sin->sin_port)); 228 return ret; 229 } 230 231 struct cxgbit_device *cxgbit_find_device(struct net_device *ndev, u8 *port_id) 232 { 233 struct cxgbit_device *cdev; 234 u8 i; 235 236 list_for_each_entry(cdev, &cdev_list_head, list) { 237 struct cxgb4_lld_info *lldi = &cdev->lldi; 238 239 for (i = 0; i < lldi->nports; i++) { 240 if (lldi->ports[i] == ndev) { 241 if (port_id) 242 *port_id = i; 243 return cdev; 244 } 245 } 246 } 247 248 return NULL; 249 } 250 251 static struct net_device *cxgbit_get_real_dev(struct net_device *ndev) 252 { 253 if (ndev->priv_flags & IFF_BONDING) { 254 pr_err("Bond devices are not supported. Interface:%s\n", 255 ndev->name); 256 return NULL; 257 } 258 259 if (is_vlan_dev(ndev)) 260 return vlan_dev_real_dev(ndev); 261 262 return ndev; 263 } 264 265 static struct net_device *cxgbit_ipv4_netdev(__be32 saddr) 266 { 267 struct net_device *ndev; 268 269 ndev = __ip_dev_find(&init_net, saddr, false); 270 if (!ndev) 271 return NULL; 272 273 return cxgbit_get_real_dev(ndev); 274 } 275 276 static struct net_device *cxgbit_ipv6_netdev(struct in6_addr *addr6) 277 { 278 struct net_device *ndev = NULL; 279 bool found = false; 280 281 if (IS_ENABLED(CONFIG_IPV6)) { 282 for_each_netdev_rcu(&init_net, ndev) 283 if (ipv6_chk_addr(&init_net, addr6, ndev, 1)) { 284 found = true; 285 break; 286 } 287 } 288 if (!found) 289 return NULL; 290 return cxgbit_get_real_dev(ndev); 291 } 292 293 static struct cxgbit_device *cxgbit_find_np_cdev(struct cxgbit_np *cnp) 294 { 295 struct sockaddr_storage *sockaddr = &cnp->com.local_addr; 296 int ss_family = sockaddr->ss_family; 297 struct net_device *ndev = NULL; 298 struct cxgbit_device *cdev = NULL; 299 300 rcu_read_lock(); 301 if (ss_family == AF_INET) { 302 struct sockaddr_in *sin; 303 304 sin = (struct sockaddr_in *)sockaddr; 305 ndev = cxgbit_ipv4_netdev(sin->sin_addr.s_addr); 306 } else if (ss_family == AF_INET6) { 307 struct sockaddr_in6 *sin6; 308 309 sin6 = (struct sockaddr_in6 *)sockaddr; 310 ndev = cxgbit_ipv6_netdev(&sin6->sin6_addr); 311 } 312 if (!ndev) 313 goto out; 314 315 cdev = cxgbit_find_device(ndev, NULL); 316 out: 317 rcu_read_unlock(); 318 return cdev; 319 } 320 321 static bool cxgbit_inaddr_any(struct cxgbit_np *cnp) 322 { 323 struct sockaddr_storage *sockaddr = &cnp->com.local_addr; 324 int ss_family = sockaddr->ss_family; 325 int addr_type; 326 327 if (ss_family == AF_INET) { 328 struct sockaddr_in *sin; 329 330 sin = (struct sockaddr_in *)sockaddr; 331 if (sin->sin_addr.s_addr == htonl(INADDR_ANY)) 332 return true; 333 } else if (ss_family == AF_INET6) { 334 struct sockaddr_in6 *sin6; 335 336 sin6 = (struct sockaddr_in6 *)sockaddr; 337 addr_type = ipv6_addr_type((const struct in6_addr *) 338 &sin6->sin6_addr); 339 if (addr_type == IPV6_ADDR_ANY) 340 return true; 341 } 342 return false; 343 } 344 345 static int 346 __cxgbit_setup_cdev_np(struct cxgbit_device *cdev, struct cxgbit_np *cnp) 347 { 348 int stid, ret; 349 int ss_family = cnp->com.local_addr.ss_family; 350 351 if (!test_bit(CDEV_STATE_UP, &cdev->flags)) 352 return -EINVAL; 353 354 stid = cxgb4_alloc_stid(cdev->lldi.tids, ss_family, cnp); 355 if (stid < 0) 356 return -EINVAL; 357 358 if (!cxgbit_np_hash_add(cdev, cnp, stid)) { 359 cxgb4_free_stid(cdev->lldi.tids, stid, ss_family); 360 return -EINVAL; 361 } 362 363 if (ss_family == AF_INET) 364 ret = cxgbit_create_server4(cdev, stid, cnp); 365 else 366 ret = cxgbit_create_server6(cdev, stid, cnp); 367 368 if (ret) { 369 if (ret != -ETIMEDOUT) 370 cxgb4_free_stid(cdev->lldi.tids, stid, 371 ss_family); 372 cxgbit_np_hash_del(cdev, cnp); 373 return ret; 374 } 375 return ret; 376 } 377 378 static int cxgbit_setup_cdev_np(struct cxgbit_np *cnp) 379 { 380 struct cxgbit_device *cdev; 381 int ret = -1; 382 383 mutex_lock(&cdev_list_lock); 384 cdev = cxgbit_find_np_cdev(cnp); 385 if (!cdev) 386 goto out; 387 388 if (cxgbit_np_hash_find(cdev, cnp) >= 0) 389 goto out; 390 391 if (__cxgbit_setup_cdev_np(cdev, cnp)) 392 goto out; 393 394 cnp->com.cdev = cdev; 395 ret = 0; 396 out: 397 mutex_unlock(&cdev_list_lock); 398 return ret; 399 } 400 401 static int cxgbit_setup_all_np(struct cxgbit_np *cnp) 402 { 403 struct cxgbit_device *cdev; 404 int ret; 405 u32 count = 0; 406 407 mutex_lock(&cdev_list_lock); 408 list_for_each_entry(cdev, &cdev_list_head, list) { 409 if (cxgbit_np_hash_find(cdev, cnp) >= 0) { 410 mutex_unlock(&cdev_list_lock); 411 return -1; 412 } 413 } 414 415 list_for_each_entry(cdev, &cdev_list_head, list) { 416 ret = __cxgbit_setup_cdev_np(cdev, cnp); 417 if (ret == -ETIMEDOUT) 418 break; 419 if (ret != 0) 420 continue; 421 count++; 422 } 423 mutex_unlock(&cdev_list_lock); 424 425 return count ? 0 : -1; 426 } 427 428 int cxgbit_setup_np(struct iscsi_np *np, struct sockaddr_storage *ksockaddr) 429 { 430 struct cxgbit_np *cnp; 431 int ret; 432 433 if ((ksockaddr->ss_family != AF_INET) && 434 (ksockaddr->ss_family != AF_INET6)) 435 return -EINVAL; 436 437 cnp = kzalloc(sizeof(*cnp), GFP_KERNEL); 438 if (!cnp) 439 return -ENOMEM; 440 441 init_waitqueue_head(&cnp->accept_wait); 442 init_completion(&cnp->com.wr_wait.completion); 443 init_completion(&cnp->accept_comp); 444 INIT_LIST_HEAD(&cnp->np_accept_list); 445 spin_lock_init(&cnp->np_accept_lock); 446 kref_init(&cnp->kref); 447 memcpy(&np->np_sockaddr, ksockaddr, 448 sizeof(struct sockaddr_storage)); 449 memcpy(&cnp->com.local_addr, &np->np_sockaddr, 450 sizeof(cnp->com.local_addr)); 451 452 cnp->np = np; 453 cnp->com.cdev = NULL; 454 455 if (cxgbit_inaddr_any(cnp)) 456 ret = cxgbit_setup_all_np(cnp); 457 else 458 ret = cxgbit_setup_cdev_np(cnp); 459 460 if (ret) { 461 cxgbit_put_cnp(cnp); 462 return -EINVAL; 463 } 464 465 np->np_context = cnp; 466 cnp->com.state = CSK_STATE_LISTEN; 467 return 0; 468 } 469 470 static void 471 cxgbit_set_conn_info(struct iscsi_np *np, struct iscsi_conn *conn, 472 struct cxgbit_sock *csk) 473 { 474 conn->login_family = np->np_sockaddr.ss_family; 475 conn->login_sockaddr = csk->com.remote_addr; 476 conn->local_sockaddr = csk->com.local_addr; 477 } 478 479 int cxgbit_accept_np(struct iscsi_np *np, struct iscsi_conn *conn) 480 { 481 struct cxgbit_np *cnp = np->np_context; 482 struct cxgbit_sock *csk; 483 int ret = 0; 484 485 accept_wait: 486 ret = wait_for_completion_interruptible(&cnp->accept_comp); 487 if (ret) 488 return -ENODEV; 489 490 spin_lock_bh(&np->np_thread_lock); 491 if (np->np_thread_state >= ISCSI_NP_THREAD_RESET) { 492 spin_unlock_bh(&np->np_thread_lock); 493 /** 494 * No point in stalling here when np_thread 495 * is in state RESET/SHUTDOWN/EXIT - bail 496 **/ 497 return -ENODEV; 498 } 499 spin_unlock_bh(&np->np_thread_lock); 500 501 spin_lock_bh(&cnp->np_accept_lock); 502 if (list_empty(&cnp->np_accept_list)) { 503 spin_unlock_bh(&cnp->np_accept_lock); 504 goto accept_wait; 505 } 506 507 csk = list_first_entry(&cnp->np_accept_list, 508 struct cxgbit_sock, 509 accept_node); 510 511 list_del_init(&csk->accept_node); 512 spin_unlock_bh(&cnp->np_accept_lock); 513 conn->context = csk; 514 csk->conn = conn; 515 516 cxgbit_set_conn_info(np, conn, csk); 517 return 0; 518 } 519 520 static int 521 __cxgbit_free_cdev_np(struct cxgbit_device *cdev, struct cxgbit_np *cnp) 522 { 523 int stid, ret; 524 bool ipv6 = false; 525 526 stid = cxgbit_np_hash_del(cdev, cnp); 527 if (stid < 0) 528 return -EINVAL; 529 if (!test_bit(CDEV_STATE_UP, &cdev->flags)) 530 return -EINVAL; 531 532 if (cnp->np->np_sockaddr.ss_family == AF_INET6) 533 ipv6 = true; 534 535 cxgbit_get_cnp(cnp); 536 cxgbit_init_wr_wait(&cnp->com.wr_wait); 537 ret = cxgb4_remove_server(cdev->lldi.ports[0], stid, 538 cdev->lldi.rxq_ids[0], ipv6); 539 540 if (ret > 0) 541 ret = net_xmit_errno(ret); 542 543 if (ret) { 544 cxgbit_put_cnp(cnp); 545 return ret; 546 } 547 548 ret = cxgbit_wait_for_reply(cdev, &cnp->com.wr_wait, 549 0, 10, __func__); 550 if (ret == -ETIMEDOUT) 551 return ret; 552 553 if (ipv6 && cnp->com.cdev) { 554 struct sockaddr_in6 *sin6; 555 556 sin6 = (struct sockaddr_in6 *)&cnp->com.local_addr; 557 cxgb4_clip_release(cdev->lldi.ports[0], 558 (const u32 *)&sin6->sin6_addr.s6_addr, 559 1); 560 } 561 562 cxgb4_free_stid(cdev->lldi.tids, stid, 563 cnp->com.local_addr.ss_family); 564 return 0; 565 } 566 567 static void cxgbit_free_all_np(struct cxgbit_np *cnp) 568 { 569 struct cxgbit_device *cdev; 570 int ret; 571 572 mutex_lock(&cdev_list_lock); 573 list_for_each_entry(cdev, &cdev_list_head, list) { 574 ret = __cxgbit_free_cdev_np(cdev, cnp); 575 if (ret == -ETIMEDOUT) 576 break; 577 } 578 mutex_unlock(&cdev_list_lock); 579 } 580 581 static void cxgbit_free_cdev_np(struct cxgbit_np *cnp) 582 { 583 struct cxgbit_device *cdev; 584 bool found = false; 585 586 mutex_lock(&cdev_list_lock); 587 list_for_each_entry(cdev, &cdev_list_head, list) { 588 if (cdev == cnp->com.cdev) { 589 found = true; 590 break; 591 } 592 } 593 if (!found) 594 goto out; 595 596 __cxgbit_free_cdev_np(cdev, cnp); 597 out: 598 mutex_unlock(&cdev_list_lock); 599 } 600 601 void cxgbit_free_np(struct iscsi_np *np) 602 { 603 struct cxgbit_np *cnp = np->np_context; 604 605 cnp->com.state = CSK_STATE_DEAD; 606 if (cnp->com.cdev) 607 cxgbit_free_cdev_np(cnp); 608 else 609 cxgbit_free_all_np(cnp); 610 611 np->np_context = NULL; 612 cxgbit_put_cnp(cnp); 613 } 614 615 static void cxgbit_send_halfclose(struct cxgbit_sock *csk) 616 { 617 struct sk_buff *skb; 618 u32 len = roundup(sizeof(struct cpl_close_con_req), 16); 619 620 skb = alloc_skb(len, GFP_ATOMIC); 621 if (!skb) 622 return; 623 624 cxgb_mk_close_con_req(skb, len, csk->tid, csk->txq_idx, 625 NULL, NULL); 626 627 cxgbit_skcb_flags(skb) |= SKCBF_TX_FLAG_COMPL; 628 __skb_queue_tail(&csk->txq, skb); 629 cxgbit_push_tx_frames(csk); 630 } 631 632 static void cxgbit_arp_failure_discard(void *handle, struct sk_buff *skb) 633 { 634 pr_debug("%s cxgbit_device %p\n", __func__, handle); 635 kfree_skb(skb); 636 } 637 638 static void cxgbit_abort_arp_failure(void *handle, struct sk_buff *skb) 639 { 640 struct cxgbit_device *cdev = handle; 641 struct cpl_abort_req *req = cplhdr(skb); 642 643 pr_debug("%s cdev %p\n", __func__, cdev); 644 req->cmd = CPL_ABORT_NO_RST; 645 cxgbit_ofld_send(cdev, skb); 646 } 647 648 static int cxgbit_send_abort_req(struct cxgbit_sock *csk) 649 { 650 struct sk_buff *skb; 651 u32 len = roundup(sizeof(struct cpl_abort_req), 16); 652 653 pr_debug("%s: csk %p tid %u; state %d\n", 654 __func__, csk, csk->tid, csk->com.state); 655 656 __skb_queue_purge(&csk->txq); 657 658 if (!test_and_set_bit(CSK_TX_DATA_SENT, &csk->com.flags)) 659 cxgbit_send_tx_flowc_wr(csk); 660 661 skb = __skb_dequeue(&csk->skbq); 662 cxgb_mk_abort_req(skb, len, csk->tid, csk->txq_idx, 663 csk->com.cdev, cxgbit_abort_arp_failure); 664 665 return cxgbit_l2t_send(csk->com.cdev, skb, csk->l2t); 666 } 667 668 void cxgbit_free_conn(struct iscsi_conn *conn) 669 { 670 struct cxgbit_sock *csk = conn->context; 671 bool release = false; 672 673 pr_debug("%s: state %d\n", 674 __func__, csk->com.state); 675 676 spin_lock_bh(&csk->lock); 677 switch (csk->com.state) { 678 case CSK_STATE_ESTABLISHED: 679 if (conn->conn_state == TARG_CONN_STATE_IN_LOGOUT) { 680 csk->com.state = CSK_STATE_CLOSING; 681 cxgbit_send_halfclose(csk); 682 } else { 683 csk->com.state = CSK_STATE_ABORTING; 684 cxgbit_send_abort_req(csk); 685 } 686 break; 687 case CSK_STATE_CLOSING: 688 csk->com.state = CSK_STATE_MORIBUND; 689 cxgbit_send_halfclose(csk); 690 break; 691 case CSK_STATE_DEAD: 692 release = true; 693 break; 694 default: 695 pr_err("%s: csk %p; state %d\n", 696 __func__, csk, csk->com.state); 697 } 698 spin_unlock_bh(&csk->lock); 699 700 if (release) 701 cxgbit_put_csk(csk); 702 } 703 704 static void cxgbit_set_emss(struct cxgbit_sock *csk, u16 opt) 705 { 706 csk->emss = csk->com.cdev->lldi.mtus[TCPOPT_MSS_G(opt)] - 707 ((csk->com.remote_addr.ss_family == AF_INET) ? 708 sizeof(struct iphdr) : sizeof(struct ipv6hdr)) - 709 sizeof(struct tcphdr); 710 csk->mss = csk->emss; 711 if (TCPOPT_TSTAMP_G(opt)) 712 csk->emss -= round_up(TCPOLEN_TIMESTAMP, 4); 713 if (csk->emss < 128) 714 csk->emss = 128; 715 if (csk->emss & 7) 716 pr_info("Warning: misaligned mtu idx %u mss %u emss=%u\n", 717 TCPOPT_MSS_G(opt), csk->mss, csk->emss); 718 pr_debug("%s mss_idx %u mss %u emss=%u\n", __func__, TCPOPT_MSS_G(opt), 719 csk->mss, csk->emss); 720 } 721 722 static void cxgbit_free_skb(struct cxgbit_sock *csk) 723 { 724 struct sk_buff *skb; 725 726 __skb_queue_purge(&csk->txq); 727 __skb_queue_purge(&csk->rxq); 728 __skb_queue_purge(&csk->backlogq); 729 __skb_queue_purge(&csk->ppodq); 730 __skb_queue_purge(&csk->skbq); 731 732 while ((skb = cxgbit_sock_dequeue_wr(csk))) 733 kfree_skb(skb); 734 735 __kfree_skb(csk->lro_hskb); 736 } 737 738 void _cxgbit_free_csk(struct kref *kref) 739 { 740 struct cxgbit_sock *csk; 741 struct cxgbit_device *cdev; 742 743 csk = container_of(kref, struct cxgbit_sock, kref); 744 745 pr_debug("%s csk %p state %d\n", __func__, csk, csk->com.state); 746 747 if (csk->com.local_addr.ss_family == AF_INET6) { 748 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) 749 &csk->com.local_addr; 750 cxgb4_clip_release(csk->com.cdev->lldi.ports[0], 751 (const u32 *) 752 &sin6->sin6_addr.s6_addr, 1); 753 } 754 755 cxgb4_remove_tid(csk->com.cdev->lldi.tids, 0, csk->tid, 756 csk->com.local_addr.ss_family); 757 dst_release(csk->dst); 758 cxgb4_l2t_release(csk->l2t); 759 760 cdev = csk->com.cdev; 761 spin_lock_bh(&cdev->cskq.lock); 762 list_del(&csk->list); 763 spin_unlock_bh(&cdev->cskq.lock); 764 765 cxgbit_free_skb(csk); 766 cxgbit_put_cdev(cdev); 767 768 kfree(csk); 769 } 770 771 static void cxgbit_set_tcp_window(struct cxgbit_sock *csk, struct port_info *pi) 772 { 773 unsigned int linkspeed; 774 u8 scale; 775 776 linkspeed = pi->link_cfg.speed; 777 scale = linkspeed / SPEED_10000; 778 779 #define CXGBIT_10G_RCV_WIN (256 * 1024) 780 csk->rcv_win = CXGBIT_10G_RCV_WIN; 781 if (scale) 782 csk->rcv_win *= scale; 783 784 #define CXGBIT_10G_SND_WIN (256 * 1024) 785 csk->snd_win = CXGBIT_10G_SND_WIN; 786 if (scale) 787 csk->snd_win *= scale; 788 789 pr_debug("%s snd_win %d rcv_win %d\n", 790 __func__, csk->snd_win, csk->rcv_win); 791 } 792 793 #ifdef CONFIG_CHELSIO_T4_DCB 794 static u8 cxgbit_get_iscsi_dcb_state(struct net_device *ndev) 795 { 796 return ndev->dcbnl_ops->getstate(ndev); 797 } 798 799 static int cxgbit_select_priority(int pri_mask) 800 { 801 if (!pri_mask) 802 return 0; 803 804 return (ffs(pri_mask) - 1); 805 } 806 807 static u8 cxgbit_get_iscsi_dcb_priority(struct net_device *ndev, u16 local_port) 808 { 809 int ret; 810 u8 caps; 811 812 struct dcb_app iscsi_dcb_app = { 813 .protocol = local_port 814 }; 815 816 ret = (int)ndev->dcbnl_ops->getcap(ndev, DCB_CAP_ATTR_DCBX, &caps); 817 818 if (ret) 819 return 0; 820 821 if (caps & DCB_CAP_DCBX_VER_IEEE) { 822 iscsi_dcb_app.selector = IEEE_8021QAZ_APP_SEL_ANY; 823 824 ret = dcb_ieee_getapp_mask(ndev, &iscsi_dcb_app); 825 826 } else if (caps & DCB_CAP_DCBX_VER_CEE) { 827 iscsi_dcb_app.selector = DCB_APP_IDTYPE_PORTNUM; 828 829 ret = dcb_getapp(ndev, &iscsi_dcb_app); 830 } 831 832 pr_info("iSCSI priority is set to %u\n", cxgbit_select_priority(ret)); 833 834 return cxgbit_select_priority(ret); 835 } 836 #endif 837 838 static int 839 cxgbit_offload_init(struct cxgbit_sock *csk, int iptype, __u8 *peer_ip, 840 u16 local_port, struct dst_entry *dst, 841 struct cxgbit_device *cdev) 842 { 843 struct neighbour *n; 844 int ret, step; 845 struct net_device *ndev; 846 u16 rxq_idx, port_id; 847 #ifdef CONFIG_CHELSIO_T4_DCB 848 u8 priority = 0; 849 #endif 850 851 n = dst_neigh_lookup(dst, peer_ip); 852 if (!n) 853 return -ENODEV; 854 855 rcu_read_lock(); 856 ret = -ENOMEM; 857 if (n->dev->flags & IFF_LOOPBACK) { 858 if (iptype == 4) 859 ndev = cxgbit_ipv4_netdev(*(__be32 *)peer_ip); 860 else if (IS_ENABLED(CONFIG_IPV6)) 861 ndev = cxgbit_ipv6_netdev((struct in6_addr *)peer_ip); 862 else 863 ndev = NULL; 864 865 if (!ndev) { 866 ret = -ENODEV; 867 goto out; 868 } 869 870 csk->l2t = cxgb4_l2t_get(cdev->lldi.l2t, 871 n, ndev, 0); 872 if (!csk->l2t) 873 goto out; 874 csk->mtu = ndev->mtu; 875 csk->tx_chan = cxgb4_port_chan(ndev); 876 csk->smac_idx = cxgb4_tp_smt_idx(cdev->lldi.adapter_type, 877 cxgb4_port_viid(ndev)); 878 step = cdev->lldi.ntxq / 879 cdev->lldi.nchan; 880 csk->txq_idx = cxgb4_port_idx(ndev) * step; 881 step = cdev->lldi.nrxq / 882 cdev->lldi.nchan; 883 csk->ctrlq_idx = cxgb4_port_idx(ndev); 884 csk->rss_qid = cdev->lldi.rxq_ids[ 885 cxgb4_port_idx(ndev) * step]; 886 csk->port_id = cxgb4_port_idx(ndev); 887 cxgbit_set_tcp_window(csk, 888 (struct port_info *)netdev_priv(ndev)); 889 } else { 890 ndev = cxgbit_get_real_dev(n->dev); 891 if (!ndev) { 892 ret = -ENODEV; 893 goto out; 894 } 895 896 #ifdef CONFIG_CHELSIO_T4_DCB 897 if (cxgbit_get_iscsi_dcb_state(ndev)) 898 priority = cxgbit_get_iscsi_dcb_priority(ndev, 899 local_port); 900 901 csk->dcb_priority = priority; 902 903 csk->l2t = cxgb4_l2t_get(cdev->lldi.l2t, n, ndev, priority); 904 #else 905 csk->l2t = cxgb4_l2t_get(cdev->lldi.l2t, n, ndev, 0); 906 #endif 907 if (!csk->l2t) 908 goto out; 909 port_id = cxgb4_port_idx(ndev); 910 csk->mtu = dst_mtu(dst); 911 csk->tx_chan = cxgb4_port_chan(ndev); 912 csk->smac_idx = cxgb4_tp_smt_idx(cdev->lldi.adapter_type, 913 cxgb4_port_viid(ndev)); 914 step = cdev->lldi.ntxq / 915 cdev->lldi.nports; 916 csk->txq_idx = (port_id * step) + 917 (cdev->selectq[port_id][0]++ % step); 918 csk->ctrlq_idx = cxgb4_port_idx(ndev); 919 step = cdev->lldi.nrxq / 920 cdev->lldi.nports; 921 rxq_idx = (port_id * step) + 922 (cdev->selectq[port_id][1]++ % step); 923 csk->rss_qid = cdev->lldi.rxq_ids[rxq_idx]; 924 csk->port_id = port_id; 925 cxgbit_set_tcp_window(csk, 926 (struct port_info *)netdev_priv(ndev)); 927 } 928 ret = 0; 929 out: 930 rcu_read_unlock(); 931 neigh_release(n); 932 return ret; 933 } 934 935 int cxgbit_ofld_send(struct cxgbit_device *cdev, struct sk_buff *skb) 936 { 937 int ret = 0; 938 939 if (!test_bit(CDEV_STATE_UP, &cdev->flags)) { 940 kfree_skb(skb); 941 pr_err("%s - device not up - dropping\n", __func__); 942 return -EIO; 943 } 944 945 ret = cxgb4_ofld_send(cdev->lldi.ports[0], skb); 946 if (ret < 0) 947 kfree_skb(skb); 948 return ret < 0 ? ret : 0; 949 } 950 951 static void cxgbit_release_tid(struct cxgbit_device *cdev, u32 tid) 952 { 953 u32 len = roundup(sizeof(struct cpl_tid_release), 16); 954 struct sk_buff *skb; 955 956 skb = alloc_skb(len, GFP_ATOMIC); 957 if (!skb) 958 return; 959 960 cxgb_mk_tid_release(skb, len, tid, 0); 961 cxgbit_ofld_send(cdev, skb); 962 } 963 964 int 965 cxgbit_l2t_send(struct cxgbit_device *cdev, struct sk_buff *skb, 966 struct l2t_entry *l2e) 967 { 968 int ret = 0; 969 970 if (!test_bit(CDEV_STATE_UP, &cdev->flags)) { 971 kfree_skb(skb); 972 pr_err("%s - device not up - dropping\n", __func__); 973 return -EIO; 974 } 975 976 ret = cxgb4_l2t_send(cdev->lldi.ports[0], skb, l2e); 977 if (ret < 0) 978 kfree_skb(skb); 979 return ret < 0 ? ret : 0; 980 } 981 982 static void cxgbit_send_rx_credits(struct cxgbit_sock *csk, struct sk_buff *skb) 983 { 984 if (csk->com.state != CSK_STATE_ESTABLISHED) { 985 __kfree_skb(skb); 986 return; 987 } 988 989 cxgbit_ofld_send(csk->com.cdev, skb); 990 } 991 992 /* 993 * CPL connection rx data ack: host -> 994 * Send RX credits through an RX_DATA_ACK CPL message. 995 * Returns the number of credits sent. 996 */ 997 int cxgbit_rx_data_ack(struct cxgbit_sock *csk) 998 { 999 struct sk_buff *skb; 1000 u32 len = roundup(sizeof(struct cpl_rx_data_ack), 16); 1001 u32 credit_dack; 1002 1003 skb = alloc_skb(len, GFP_KERNEL); 1004 if (!skb) 1005 return -1; 1006 1007 credit_dack = RX_DACK_CHANGE_F | RX_DACK_MODE_V(1) | 1008 RX_CREDITS_V(csk->rx_credits); 1009 1010 cxgb_mk_rx_data_ack(skb, len, csk->tid, csk->ctrlq_idx, 1011 credit_dack); 1012 1013 csk->rx_credits = 0; 1014 1015 spin_lock_bh(&csk->lock); 1016 if (csk->lock_owner) { 1017 cxgbit_skcb_rx_backlog_fn(skb) = cxgbit_send_rx_credits; 1018 __skb_queue_tail(&csk->backlogq, skb); 1019 spin_unlock_bh(&csk->lock); 1020 return 0; 1021 } 1022 1023 cxgbit_send_rx_credits(csk, skb); 1024 spin_unlock_bh(&csk->lock); 1025 1026 return 0; 1027 } 1028 1029 #define FLOWC_WR_NPARAMS_MIN 9 1030 #define FLOWC_WR_NPARAMS_MAX 11 1031 static int cxgbit_alloc_csk_skb(struct cxgbit_sock *csk) 1032 { 1033 struct sk_buff *skb; 1034 u32 len, flowclen; 1035 u8 i; 1036 1037 flowclen = offsetof(struct fw_flowc_wr, 1038 mnemval[FLOWC_WR_NPARAMS_MAX]); 1039 1040 len = max_t(u32, sizeof(struct cpl_abort_req), 1041 sizeof(struct cpl_abort_rpl)); 1042 1043 len = max(len, flowclen); 1044 len = roundup(len, 16); 1045 1046 for (i = 0; i < 3; i++) { 1047 skb = alloc_skb(len, GFP_ATOMIC); 1048 if (!skb) 1049 goto out; 1050 __skb_queue_tail(&csk->skbq, skb); 1051 } 1052 1053 skb = alloc_skb(LRO_SKB_MIN_HEADROOM, GFP_ATOMIC); 1054 if (!skb) 1055 goto out; 1056 1057 memset(skb->data, 0, LRO_SKB_MIN_HEADROOM); 1058 csk->lro_hskb = skb; 1059 1060 return 0; 1061 out: 1062 __skb_queue_purge(&csk->skbq); 1063 return -ENOMEM; 1064 } 1065 1066 static void 1067 cxgbit_pass_accept_rpl(struct cxgbit_sock *csk, struct cpl_pass_accept_req *req) 1068 { 1069 struct sk_buff *skb; 1070 const struct tcphdr *tcph; 1071 struct cpl_t5_pass_accept_rpl *rpl5; 1072 struct cxgb4_lld_info *lldi = &csk->com.cdev->lldi; 1073 unsigned int len = roundup(sizeof(*rpl5), 16); 1074 unsigned int mtu_idx; 1075 u64 opt0; 1076 u32 opt2, hlen; 1077 u32 wscale; 1078 u32 win; 1079 1080 pr_debug("%s csk %p tid %u\n", __func__, csk, csk->tid); 1081 1082 skb = alloc_skb(len, GFP_ATOMIC); 1083 if (!skb) { 1084 cxgbit_put_csk(csk); 1085 return; 1086 } 1087 1088 rpl5 = __skb_put_zero(skb, len); 1089 1090 INIT_TP_WR(rpl5, csk->tid); 1091 OPCODE_TID(rpl5) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL, 1092 csk->tid)); 1093 cxgb_best_mtu(csk->com.cdev->lldi.mtus, csk->mtu, &mtu_idx, 1094 req->tcpopt.tstamp, 1095 (csk->com.remote_addr.ss_family == AF_INET) ? 0 : 1); 1096 wscale = cxgb_compute_wscale(csk->rcv_win); 1097 /* 1098 * Specify the largest window that will fit in opt0. The 1099 * remainder will be specified in the rx_data_ack. 1100 */ 1101 win = csk->rcv_win >> 10; 1102 if (win > RCV_BUFSIZ_M) 1103 win = RCV_BUFSIZ_M; 1104 opt0 = TCAM_BYPASS_F | 1105 WND_SCALE_V(wscale) | 1106 MSS_IDX_V(mtu_idx) | 1107 L2T_IDX_V(csk->l2t->idx) | 1108 TX_CHAN_V(csk->tx_chan) | 1109 SMAC_SEL_V(csk->smac_idx) | 1110 DSCP_V(csk->tos >> 2) | 1111 ULP_MODE_V(ULP_MODE_ISCSI) | 1112 RCV_BUFSIZ_V(win); 1113 1114 opt2 = RX_CHANNEL_V(0) | 1115 RSS_QUEUE_VALID_F | RSS_QUEUE_V(csk->rss_qid); 1116 1117 if (!is_t5(lldi->adapter_type)) 1118 opt2 |= RX_FC_DISABLE_F; 1119 1120 if (req->tcpopt.tstamp) 1121 opt2 |= TSTAMPS_EN_F; 1122 if (req->tcpopt.sack) 1123 opt2 |= SACK_EN_F; 1124 if (wscale) 1125 opt2 |= WND_SCALE_EN_F; 1126 1127 hlen = ntohl(req->hdr_len); 1128 1129 if (is_t5(lldi->adapter_type)) 1130 tcph = (struct tcphdr *)((u8 *)(req + 1) + 1131 ETH_HDR_LEN_G(hlen) + IP_HDR_LEN_G(hlen)); 1132 else 1133 tcph = (struct tcphdr *)((u8 *)(req + 1) + 1134 T6_ETH_HDR_LEN_G(hlen) + T6_IP_HDR_LEN_G(hlen)); 1135 1136 if (tcph->ece && tcph->cwr) 1137 opt2 |= CCTRL_ECN_V(1); 1138 1139 opt2 |= RX_COALESCE_V(3); 1140 opt2 |= CONG_CNTRL_V(CONG_ALG_NEWRENO); 1141 1142 opt2 |= T5_ISS_F; 1143 rpl5->iss = cpu_to_be32((prandom_u32() & ~7UL) - 1); 1144 1145 opt2 |= T5_OPT_2_VALID_F; 1146 1147 rpl5->opt0 = cpu_to_be64(opt0); 1148 rpl5->opt2 = cpu_to_be32(opt2); 1149 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->ctrlq_idx); 1150 t4_set_arp_err_handler(skb, NULL, cxgbit_arp_failure_discard); 1151 cxgbit_l2t_send(csk->com.cdev, skb, csk->l2t); 1152 } 1153 1154 static void 1155 cxgbit_pass_accept_req(struct cxgbit_device *cdev, struct sk_buff *skb) 1156 { 1157 struct cxgbit_sock *csk = NULL; 1158 struct cxgbit_np *cnp; 1159 struct cpl_pass_accept_req *req = cplhdr(skb); 1160 unsigned int stid = PASS_OPEN_TID_G(ntohl(req->tos_stid)); 1161 struct tid_info *t = cdev->lldi.tids; 1162 unsigned int tid = GET_TID(req); 1163 u16 peer_mss = ntohs(req->tcpopt.mss); 1164 unsigned short hdrs; 1165 1166 struct dst_entry *dst; 1167 __u8 local_ip[16], peer_ip[16]; 1168 __be16 local_port, peer_port; 1169 int ret; 1170 int iptype; 1171 1172 pr_debug("%s: cdev = %p; stid = %u; tid = %u\n", 1173 __func__, cdev, stid, tid); 1174 1175 cnp = lookup_stid(t, stid); 1176 if (!cnp) { 1177 pr_err("%s connect request on invalid stid %d\n", 1178 __func__, stid); 1179 goto rel_skb; 1180 } 1181 1182 if (cnp->com.state != CSK_STATE_LISTEN) { 1183 pr_err("%s - listening parent not in CSK_STATE_LISTEN\n", 1184 __func__); 1185 goto reject; 1186 } 1187 1188 csk = lookup_tid(t, tid); 1189 if (csk) { 1190 pr_err("%s csk not null tid %u\n", 1191 __func__, tid); 1192 goto rel_skb; 1193 } 1194 1195 cxgb_get_4tuple(req, cdev->lldi.adapter_type, &iptype, local_ip, 1196 peer_ip, &local_port, &peer_port); 1197 1198 /* Find output route */ 1199 if (iptype == 4) { 1200 pr_debug("%s parent sock %p tid %u laddr %pI4 raddr %pI4 " 1201 "lport %d rport %d peer_mss %d\n" 1202 , __func__, cnp, tid, 1203 local_ip, peer_ip, ntohs(local_port), 1204 ntohs(peer_port), peer_mss); 1205 dst = cxgb_find_route(&cdev->lldi, cxgbit_get_real_dev, 1206 *(__be32 *)local_ip, 1207 *(__be32 *)peer_ip, 1208 local_port, peer_port, 1209 PASS_OPEN_TOS_G(ntohl(req->tos_stid))); 1210 } else { 1211 pr_debug("%s parent sock %p tid %u laddr %pI6 raddr %pI6 " 1212 "lport %d rport %d peer_mss %d\n" 1213 , __func__, cnp, tid, 1214 local_ip, peer_ip, ntohs(local_port), 1215 ntohs(peer_port), peer_mss); 1216 dst = cxgb_find_route6(&cdev->lldi, cxgbit_get_real_dev, 1217 local_ip, peer_ip, 1218 local_port, peer_port, 1219 PASS_OPEN_TOS_G(ntohl(req->tos_stid)), 1220 ((struct sockaddr_in6 *) 1221 &cnp->com.local_addr)->sin6_scope_id); 1222 } 1223 if (!dst) { 1224 pr_err("%s - failed to find dst entry!\n", 1225 __func__); 1226 goto reject; 1227 } 1228 1229 csk = kzalloc(sizeof(*csk), GFP_ATOMIC); 1230 if (!csk) { 1231 dst_release(dst); 1232 goto rel_skb; 1233 } 1234 1235 ret = cxgbit_offload_init(csk, iptype, peer_ip, ntohs(local_port), 1236 dst, cdev); 1237 if (ret) { 1238 pr_err("%s - failed to allocate l2t entry!\n", 1239 __func__); 1240 dst_release(dst); 1241 kfree(csk); 1242 goto reject; 1243 } 1244 1245 kref_init(&csk->kref); 1246 init_completion(&csk->com.wr_wait.completion); 1247 1248 INIT_LIST_HEAD(&csk->accept_node); 1249 1250 hdrs = (iptype == 4 ? sizeof(struct iphdr) : sizeof(struct ipv6hdr)) + 1251 sizeof(struct tcphdr) + (req->tcpopt.tstamp ? 12 : 0); 1252 if (peer_mss && csk->mtu > (peer_mss + hdrs)) 1253 csk->mtu = peer_mss + hdrs; 1254 1255 csk->com.state = CSK_STATE_CONNECTING; 1256 csk->com.cdev = cdev; 1257 csk->cnp = cnp; 1258 csk->tos = PASS_OPEN_TOS_G(ntohl(req->tos_stid)); 1259 csk->dst = dst; 1260 csk->tid = tid; 1261 csk->wr_cred = cdev->lldi.wr_cred - 1262 DIV_ROUND_UP(sizeof(struct cpl_abort_req), 16); 1263 csk->wr_max_cred = csk->wr_cred; 1264 csk->wr_una_cred = 0; 1265 1266 if (iptype == 4) { 1267 struct sockaddr_in *sin = (struct sockaddr_in *) 1268 &csk->com.local_addr; 1269 sin->sin_family = AF_INET; 1270 sin->sin_port = local_port; 1271 sin->sin_addr.s_addr = *(__be32 *)local_ip; 1272 1273 sin = (struct sockaddr_in *)&csk->com.remote_addr; 1274 sin->sin_family = AF_INET; 1275 sin->sin_port = peer_port; 1276 sin->sin_addr.s_addr = *(__be32 *)peer_ip; 1277 } else { 1278 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) 1279 &csk->com.local_addr; 1280 1281 sin6->sin6_family = PF_INET6; 1282 sin6->sin6_port = local_port; 1283 memcpy(sin6->sin6_addr.s6_addr, local_ip, 16); 1284 cxgb4_clip_get(cdev->lldi.ports[0], 1285 (const u32 *)&sin6->sin6_addr.s6_addr, 1286 1); 1287 1288 sin6 = (struct sockaddr_in6 *)&csk->com.remote_addr; 1289 sin6->sin6_family = PF_INET6; 1290 sin6->sin6_port = peer_port; 1291 memcpy(sin6->sin6_addr.s6_addr, peer_ip, 16); 1292 } 1293 1294 skb_queue_head_init(&csk->rxq); 1295 skb_queue_head_init(&csk->txq); 1296 skb_queue_head_init(&csk->ppodq); 1297 skb_queue_head_init(&csk->backlogq); 1298 skb_queue_head_init(&csk->skbq); 1299 cxgbit_sock_reset_wr_list(csk); 1300 spin_lock_init(&csk->lock); 1301 init_waitqueue_head(&csk->waitq); 1302 init_waitqueue_head(&csk->ack_waitq); 1303 csk->lock_owner = false; 1304 1305 if (cxgbit_alloc_csk_skb(csk)) { 1306 dst_release(dst); 1307 kfree(csk); 1308 goto rel_skb; 1309 } 1310 1311 cxgbit_get_cdev(cdev); 1312 1313 spin_lock(&cdev->cskq.lock); 1314 list_add_tail(&csk->list, &cdev->cskq.list); 1315 spin_unlock(&cdev->cskq.lock); 1316 cxgb4_insert_tid(t, csk, tid, csk->com.local_addr.ss_family); 1317 cxgbit_pass_accept_rpl(csk, req); 1318 goto rel_skb; 1319 1320 reject: 1321 cxgbit_release_tid(cdev, tid); 1322 rel_skb: 1323 __kfree_skb(skb); 1324 } 1325 1326 static u32 1327 cxgbit_tx_flowc_wr_credits(struct cxgbit_sock *csk, u32 *nparamsp, 1328 u32 *flowclenp) 1329 { 1330 u32 nparams, flowclen16, flowclen; 1331 1332 nparams = FLOWC_WR_NPARAMS_MIN; 1333 1334 if (csk->snd_wscale) 1335 nparams++; 1336 1337 #ifdef CONFIG_CHELSIO_T4_DCB 1338 nparams++; 1339 #endif 1340 flowclen = offsetof(struct fw_flowc_wr, mnemval[nparams]); 1341 flowclen16 = DIV_ROUND_UP(flowclen, 16); 1342 flowclen = flowclen16 * 16; 1343 /* 1344 * Return the number of 16-byte credits used by the flowc request. 1345 * Pass back the nparams and actual flowc length if requested. 1346 */ 1347 if (nparamsp) 1348 *nparamsp = nparams; 1349 if (flowclenp) 1350 *flowclenp = flowclen; 1351 return flowclen16; 1352 } 1353 1354 u32 cxgbit_send_tx_flowc_wr(struct cxgbit_sock *csk) 1355 { 1356 struct cxgbit_device *cdev = csk->com.cdev; 1357 struct fw_flowc_wr *flowc; 1358 u32 nparams, flowclen16, flowclen; 1359 struct sk_buff *skb; 1360 u8 index; 1361 1362 #ifdef CONFIG_CHELSIO_T4_DCB 1363 u16 vlan = ((struct l2t_entry *)csk->l2t)->vlan; 1364 #endif 1365 1366 flowclen16 = cxgbit_tx_flowc_wr_credits(csk, &nparams, &flowclen); 1367 1368 skb = __skb_dequeue(&csk->skbq); 1369 flowc = __skb_put_zero(skb, flowclen); 1370 1371 flowc->op_to_nparams = cpu_to_be32(FW_WR_OP_V(FW_FLOWC_WR) | 1372 FW_FLOWC_WR_NPARAMS_V(nparams)); 1373 flowc->flowid_len16 = cpu_to_be32(FW_WR_LEN16_V(flowclen16) | 1374 FW_WR_FLOWID_V(csk->tid)); 1375 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN; 1376 flowc->mnemval[0].val = cpu_to_be32(FW_PFVF_CMD_PFN_V 1377 (csk->com.cdev->lldi.pf)); 1378 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH; 1379 flowc->mnemval[1].val = cpu_to_be32(csk->tx_chan); 1380 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT; 1381 flowc->mnemval[2].val = cpu_to_be32(csk->tx_chan); 1382 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID; 1383 flowc->mnemval[3].val = cpu_to_be32(csk->rss_qid); 1384 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT; 1385 flowc->mnemval[4].val = cpu_to_be32(csk->snd_nxt); 1386 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT; 1387 flowc->mnemval[5].val = cpu_to_be32(csk->rcv_nxt); 1388 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF; 1389 flowc->mnemval[6].val = cpu_to_be32(csk->snd_win); 1390 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS; 1391 flowc->mnemval[7].val = cpu_to_be32(csk->emss); 1392 1393 flowc->mnemval[8].mnemonic = FW_FLOWC_MNEM_TXDATAPLEN_MAX; 1394 if (test_bit(CDEV_ISO_ENABLE, &cdev->flags)) 1395 flowc->mnemval[8].val = cpu_to_be32(CXGBIT_MAX_ISO_PAYLOAD); 1396 else 1397 flowc->mnemval[8].val = cpu_to_be32(16384); 1398 1399 index = 9; 1400 1401 if (csk->snd_wscale) { 1402 flowc->mnemval[index].mnemonic = FW_FLOWC_MNEM_RCV_SCALE; 1403 flowc->mnemval[index].val = cpu_to_be32(csk->snd_wscale); 1404 index++; 1405 } 1406 1407 #ifdef CONFIG_CHELSIO_T4_DCB 1408 flowc->mnemval[index].mnemonic = FW_FLOWC_MNEM_DCBPRIO; 1409 if (vlan == VLAN_NONE) { 1410 pr_warn("csk %u without VLAN Tag on DCB Link\n", csk->tid); 1411 flowc->mnemval[index].val = cpu_to_be32(0); 1412 } else 1413 flowc->mnemval[index].val = cpu_to_be32( 1414 (vlan & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT); 1415 #endif 1416 1417 pr_debug("%s: csk %p; tx_chan = %u; rss_qid = %u; snd_seq = %u;" 1418 " rcv_seq = %u; snd_win = %u; emss = %u\n", 1419 __func__, csk, csk->tx_chan, csk->rss_qid, csk->snd_nxt, 1420 csk->rcv_nxt, csk->snd_win, csk->emss); 1421 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->txq_idx); 1422 cxgbit_ofld_send(csk->com.cdev, skb); 1423 return flowclen16; 1424 } 1425 1426 int cxgbit_setup_conn_digest(struct cxgbit_sock *csk) 1427 { 1428 struct sk_buff *skb; 1429 struct cpl_set_tcb_field *req; 1430 u8 hcrc = csk->submode & CXGBIT_SUBMODE_HCRC; 1431 u8 dcrc = csk->submode & CXGBIT_SUBMODE_DCRC; 1432 unsigned int len = roundup(sizeof(*req), 16); 1433 int ret; 1434 1435 skb = alloc_skb(len, GFP_KERNEL); 1436 if (!skb) 1437 return -ENOMEM; 1438 1439 /* set up ulp submode */ 1440 req = __skb_put_zero(skb, len); 1441 1442 INIT_TP_WR(req, csk->tid); 1443 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid)); 1444 req->reply_ctrl = htons(NO_REPLY_V(0) | QUEUENO_V(csk->rss_qid)); 1445 req->word_cookie = htons(0); 1446 req->mask = cpu_to_be64(0x3 << 4); 1447 req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) | 1448 (dcrc ? ULP_CRC_DATA : 0)) << 4); 1449 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->ctrlq_idx); 1450 1451 cxgbit_get_csk(csk); 1452 cxgbit_init_wr_wait(&csk->com.wr_wait); 1453 1454 cxgbit_ofld_send(csk->com.cdev, skb); 1455 1456 ret = cxgbit_wait_for_reply(csk->com.cdev, 1457 &csk->com.wr_wait, 1458 csk->tid, 5, __func__); 1459 if (ret) 1460 return -1; 1461 1462 return 0; 1463 } 1464 1465 int cxgbit_setup_conn_pgidx(struct cxgbit_sock *csk, u32 pg_idx) 1466 { 1467 struct sk_buff *skb; 1468 struct cpl_set_tcb_field *req; 1469 unsigned int len = roundup(sizeof(*req), 16); 1470 int ret; 1471 1472 skb = alloc_skb(len, GFP_KERNEL); 1473 if (!skb) 1474 return -ENOMEM; 1475 1476 req = __skb_put_zero(skb, len); 1477 1478 INIT_TP_WR(req, csk->tid); 1479 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid)); 1480 req->reply_ctrl = htons(NO_REPLY_V(0) | QUEUENO_V(csk->rss_qid)); 1481 req->word_cookie = htons(0); 1482 req->mask = cpu_to_be64(0x3 << 8); 1483 req->val = cpu_to_be64(pg_idx << 8); 1484 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->ctrlq_idx); 1485 1486 cxgbit_get_csk(csk); 1487 cxgbit_init_wr_wait(&csk->com.wr_wait); 1488 1489 cxgbit_ofld_send(csk->com.cdev, skb); 1490 1491 ret = cxgbit_wait_for_reply(csk->com.cdev, 1492 &csk->com.wr_wait, 1493 csk->tid, 5, __func__); 1494 if (ret) 1495 return -1; 1496 1497 return 0; 1498 } 1499 1500 static void 1501 cxgbit_pass_open_rpl(struct cxgbit_device *cdev, struct sk_buff *skb) 1502 { 1503 struct cpl_pass_open_rpl *rpl = cplhdr(skb); 1504 struct tid_info *t = cdev->lldi.tids; 1505 unsigned int stid = GET_TID(rpl); 1506 struct cxgbit_np *cnp = lookup_stid(t, stid); 1507 1508 pr_debug("%s: cnp = %p; stid = %u; status = %d\n", 1509 __func__, cnp, stid, rpl->status); 1510 1511 if (!cnp) { 1512 pr_info("%s stid %d lookup failure\n", __func__, stid); 1513 return; 1514 } 1515 1516 cxgbit_wake_up(&cnp->com.wr_wait, __func__, rpl->status); 1517 cxgbit_put_cnp(cnp); 1518 } 1519 1520 static void 1521 cxgbit_close_listsrv_rpl(struct cxgbit_device *cdev, struct sk_buff *skb) 1522 { 1523 struct cpl_close_listsvr_rpl *rpl = cplhdr(skb); 1524 struct tid_info *t = cdev->lldi.tids; 1525 unsigned int stid = GET_TID(rpl); 1526 struct cxgbit_np *cnp = lookup_stid(t, stid); 1527 1528 pr_debug("%s: cnp = %p; stid = %u; status = %d\n", 1529 __func__, cnp, stid, rpl->status); 1530 1531 if (!cnp) { 1532 pr_info("%s stid %d lookup failure\n", __func__, stid); 1533 return; 1534 } 1535 1536 cxgbit_wake_up(&cnp->com.wr_wait, __func__, rpl->status); 1537 cxgbit_put_cnp(cnp); 1538 } 1539 1540 static void 1541 cxgbit_pass_establish(struct cxgbit_device *cdev, struct sk_buff *skb) 1542 { 1543 struct cpl_pass_establish *req = cplhdr(skb); 1544 struct tid_info *t = cdev->lldi.tids; 1545 unsigned int tid = GET_TID(req); 1546 struct cxgbit_sock *csk; 1547 struct cxgbit_np *cnp; 1548 u16 tcp_opt = be16_to_cpu(req->tcp_opt); 1549 u32 snd_isn = be32_to_cpu(req->snd_isn); 1550 u32 rcv_isn = be32_to_cpu(req->rcv_isn); 1551 1552 csk = lookup_tid(t, tid); 1553 if (unlikely(!csk)) { 1554 pr_err("can't find connection for tid %u.\n", tid); 1555 goto rel_skb; 1556 } 1557 cnp = csk->cnp; 1558 1559 pr_debug("%s: csk %p; tid %u; cnp %p\n", 1560 __func__, csk, tid, cnp); 1561 1562 csk->write_seq = snd_isn; 1563 csk->snd_una = snd_isn; 1564 csk->snd_nxt = snd_isn; 1565 1566 csk->rcv_nxt = rcv_isn; 1567 1568 if (csk->rcv_win > (RCV_BUFSIZ_M << 10)) 1569 csk->rx_credits = (csk->rcv_win - (RCV_BUFSIZ_M << 10)); 1570 1571 csk->snd_wscale = TCPOPT_SND_WSCALE_G(tcp_opt); 1572 cxgbit_set_emss(csk, tcp_opt); 1573 dst_confirm(csk->dst); 1574 csk->com.state = CSK_STATE_ESTABLISHED; 1575 spin_lock_bh(&cnp->np_accept_lock); 1576 list_add_tail(&csk->accept_node, &cnp->np_accept_list); 1577 spin_unlock_bh(&cnp->np_accept_lock); 1578 complete(&cnp->accept_comp); 1579 rel_skb: 1580 __kfree_skb(skb); 1581 } 1582 1583 static void cxgbit_queue_rx_skb(struct cxgbit_sock *csk, struct sk_buff *skb) 1584 { 1585 cxgbit_skcb_flags(skb) = 0; 1586 spin_lock_bh(&csk->rxq.lock); 1587 __skb_queue_tail(&csk->rxq, skb); 1588 spin_unlock_bh(&csk->rxq.lock); 1589 wake_up(&csk->waitq); 1590 } 1591 1592 static void cxgbit_peer_close(struct cxgbit_sock *csk, struct sk_buff *skb) 1593 { 1594 pr_debug("%s: csk %p; tid %u; state %d\n", 1595 __func__, csk, csk->tid, csk->com.state); 1596 1597 switch (csk->com.state) { 1598 case CSK_STATE_ESTABLISHED: 1599 csk->com.state = CSK_STATE_CLOSING; 1600 cxgbit_queue_rx_skb(csk, skb); 1601 return; 1602 case CSK_STATE_CLOSING: 1603 /* simultaneous close */ 1604 csk->com.state = CSK_STATE_MORIBUND; 1605 break; 1606 case CSK_STATE_MORIBUND: 1607 csk->com.state = CSK_STATE_DEAD; 1608 cxgbit_put_csk(csk); 1609 break; 1610 case CSK_STATE_ABORTING: 1611 break; 1612 default: 1613 pr_info("%s: cpl_peer_close in bad state %d\n", 1614 __func__, csk->com.state); 1615 } 1616 1617 __kfree_skb(skb); 1618 } 1619 1620 static void cxgbit_close_con_rpl(struct cxgbit_sock *csk, struct sk_buff *skb) 1621 { 1622 pr_debug("%s: csk %p; tid %u; state %d\n", 1623 __func__, csk, csk->tid, csk->com.state); 1624 1625 switch (csk->com.state) { 1626 case CSK_STATE_CLOSING: 1627 csk->com.state = CSK_STATE_MORIBUND; 1628 break; 1629 case CSK_STATE_MORIBUND: 1630 csk->com.state = CSK_STATE_DEAD; 1631 cxgbit_put_csk(csk); 1632 break; 1633 case CSK_STATE_ABORTING: 1634 case CSK_STATE_DEAD: 1635 break; 1636 default: 1637 pr_info("%s: cpl_close_con_rpl in bad state %d\n", 1638 __func__, csk->com.state); 1639 } 1640 1641 __kfree_skb(skb); 1642 } 1643 1644 static void cxgbit_abort_req_rss(struct cxgbit_sock *csk, struct sk_buff *skb) 1645 { 1646 struct cpl_abort_req_rss *hdr = cplhdr(skb); 1647 unsigned int tid = GET_TID(hdr); 1648 struct sk_buff *rpl_skb; 1649 bool release = false; 1650 bool wakeup_thread = false; 1651 u32 len = roundup(sizeof(struct cpl_abort_rpl), 16); 1652 1653 pr_debug("%s: csk %p; tid %u; state %d\n", 1654 __func__, csk, tid, csk->com.state); 1655 1656 if (cxgb_is_neg_adv(hdr->status)) { 1657 pr_err("%s: got neg advise %d on tid %u\n", 1658 __func__, hdr->status, tid); 1659 goto rel_skb; 1660 } 1661 1662 switch (csk->com.state) { 1663 case CSK_STATE_CONNECTING: 1664 case CSK_STATE_MORIBUND: 1665 csk->com.state = CSK_STATE_DEAD; 1666 release = true; 1667 break; 1668 case CSK_STATE_ESTABLISHED: 1669 csk->com.state = CSK_STATE_DEAD; 1670 wakeup_thread = true; 1671 break; 1672 case CSK_STATE_CLOSING: 1673 csk->com.state = CSK_STATE_DEAD; 1674 if (!csk->conn) 1675 release = true; 1676 break; 1677 case CSK_STATE_ABORTING: 1678 break; 1679 default: 1680 pr_info("%s: cpl_abort_req_rss in bad state %d\n", 1681 __func__, csk->com.state); 1682 csk->com.state = CSK_STATE_DEAD; 1683 } 1684 1685 __skb_queue_purge(&csk->txq); 1686 1687 if (!test_and_set_bit(CSK_TX_DATA_SENT, &csk->com.flags)) 1688 cxgbit_send_tx_flowc_wr(csk); 1689 1690 rpl_skb = __skb_dequeue(&csk->skbq); 1691 1692 cxgb_mk_abort_rpl(rpl_skb, len, csk->tid, csk->txq_idx); 1693 cxgbit_ofld_send(csk->com.cdev, rpl_skb); 1694 1695 if (wakeup_thread) { 1696 cxgbit_queue_rx_skb(csk, skb); 1697 return; 1698 } 1699 1700 if (release) 1701 cxgbit_put_csk(csk); 1702 rel_skb: 1703 __kfree_skb(skb); 1704 } 1705 1706 static void cxgbit_abort_rpl_rss(struct cxgbit_sock *csk, struct sk_buff *skb) 1707 { 1708 pr_debug("%s: csk %p; tid %u; state %d\n", 1709 __func__, csk, csk->tid, csk->com.state); 1710 1711 switch (csk->com.state) { 1712 case CSK_STATE_ABORTING: 1713 csk->com.state = CSK_STATE_DEAD; 1714 cxgbit_put_csk(csk); 1715 break; 1716 default: 1717 pr_info("%s: cpl_abort_rpl_rss in state %d\n", 1718 __func__, csk->com.state); 1719 } 1720 1721 __kfree_skb(skb); 1722 } 1723 1724 static bool cxgbit_credit_err(const struct cxgbit_sock *csk) 1725 { 1726 const struct sk_buff *skb = csk->wr_pending_head; 1727 u32 credit = 0; 1728 1729 if (unlikely(csk->wr_cred > csk->wr_max_cred)) { 1730 pr_err("csk 0x%p, tid %u, credit %u > %u\n", 1731 csk, csk->tid, csk->wr_cred, csk->wr_max_cred); 1732 return true; 1733 } 1734 1735 while (skb) { 1736 credit += (__force u32)skb->csum; 1737 skb = cxgbit_skcb_tx_wr_next(skb); 1738 } 1739 1740 if (unlikely((csk->wr_cred + credit) != csk->wr_max_cred)) { 1741 pr_err("csk 0x%p, tid %u, credit %u + %u != %u.\n", 1742 csk, csk->tid, csk->wr_cred, 1743 credit, csk->wr_max_cred); 1744 1745 return true; 1746 } 1747 1748 return false; 1749 } 1750 1751 static void cxgbit_fw4_ack(struct cxgbit_sock *csk, struct sk_buff *skb) 1752 { 1753 struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)cplhdr(skb); 1754 u32 credits = rpl->credits; 1755 u32 snd_una = ntohl(rpl->snd_una); 1756 1757 csk->wr_cred += credits; 1758 if (csk->wr_una_cred > (csk->wr_max_cred - csk->wr_cred)) 1759 csk->wr_una_cred = csk->wr_max_cred - csk->wr_cred; 1760 1761 while (credits) { 1762 struct sk_buff *p = cxgbit_sock_peek_wr(csk); 1763 const u32 csum = (__force u32)p->csum; 1764 1765 if (unlikely(!p)) { 1766 pr_err("csk 0x%p,%u, cr %u,%u+%u, empty.\n", 1767 csk, csk->tid, credits, 1768 csk->wr_cred, csk->wr_una_cred); 1769 break; 1770 } 1771 1772 if (unlikely(credits < csum)) { 1773 pr_warn("csk 0x%p,%u, cr %u,%u+%u, < %u.\n", 1774 csk, csk->tid, 1775 credits, csk->wr_cred, csk->wr_una_cred, 1776 csum); 1777 p->csum = (__force __wsum)(csum - credits); 1778 break; 1779 } 1780 1781 cxgbit_sock_dequeue_wr(csk); 1782 credits -= csum; 1783 kfree_skb(p); 1784 } 1785 1786 if (unlikely(cxgbit_credit_err(csk))) { 1787 cxgbit_queue_rx_skb(csk, skb); 1788 return; 1789 } 1790 1791 if (rpl->seq_vld & CPL_FW4_ACK_FLAGS_SEQVAL) { 1792 if (unlikely(before(snd_una, csk->snd_una))) { 1793 pr_warn("csk 0x%p,%u, snd_una %u/%u.", 1794 csk, csk->tid, snd_una, 1795 csk->snd_una); 1796 goto rel_skb; 1797 } 1798 1799 if (csk->snd_una != snd_una) { 1800 csk->snd_una = snd_una; 1801 dst_confirm(csk->dst); 1802 wake_up(&csk->ack_waitq); 1803 } 1804 } 1805 1806 if (skb_queue_len(&csk->txq)) 1807 cxgbit_push_tx_frames(csk); 1808 1809 rel_skb: 1810 __kfree_skb(skb); 1811 } 1812 1813 static void cxgbit_set_tcb_rpl(struct cxgbit_device *cdev, struct sk_buff *skb) 1814 { 1815 struct cxgbit_sock *csk; 1816 struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data; 1817 unsigned int tid = GET_TID(rpl); 1818 struct cxgb4_lld_info *lldi = &cdev->lldi; 1819 struct tid_info *t = lldi->tids; 1820 1821 csk = lookup_tid(t, tid); 1822 if (unlikely(!csk)) 1823 pr_err("can't find connection for tid %u.\n", tid); 1824 else 1825 cxgbit_wake_up(&csk->com.wr_wait, __func__, rpl->status); 1826 1827 cxgbit_put_csk(csk); 1828 } 1829 1830 static void cxgbit_rx_data(struct cxgbit_device *cdev, struct sk_buff *skb) 1831 { 1832 struct cxgbit_sock *csk; 1833 struct cpl_rx_data *cpl = cplhdr(skb); 1834 unsigned int tid = GET_TID(cpl); 1835 struct cxgb4_lld_info *lldi = &cdev->lldi; 1836 struct tid_info *t = lldi->tids; 1837 1838 csk = lookup_tid(t, tid); 1839 if (unlikely(!csk)) { 1840 pr_err("can't find conn. for tid %u.\n", tid); 1841 goto rel_skb; 1842 } 1843 1844 cxgbit_queue_rx_skb(csk, skb); 1845 return; 1846 rel_skb: 1847 __kfree_skb(skb); 1848 } 1849 1850 static void 1851 __cxgbit_process_rx_cpl(struct cxgbit_sock *csk, struct sk_buff *skb) 1852 { 1853 spin_lock(&csk->lock); 1854 if (csk->lock_owner) { 1855 __skb_queue_tail(&csk->backlogq, skb); 1856 spin_unlock(&csk->lock); 1857 return; 1858 } 1859 1860 cxgbit_skcb_rx_backlog_fn(skb)(csk, skb); 1861 spin_unlock(&csk->lock); 1862 } 1863 1864 static void cxgbit_process_rx_cpl(struct cxgbit_sock *csk, struct sk_buff *skb) 1865 { 1866 cxgbit_get_csk(csk); 1867 __cxgbit_process_rx_cpl(csk, skb); 1868 cxgbit_put_csk(csk); 1869 } 1870 1871 static void cxgbit_rx_cpl(struct cxgbit_device *cdev, struct sk_buff *skb) 1872 { 1873 struct cxgbit_sock *csk; 1874 struct cpl_tx_data *cpl = cplhdr(skb); 1875 struct cxgb4_lld_info *lldi = &cdev->lldi; 1876 struct tid_info *t = lldi->tids; 1877 unsigned int tid = GET_TID(cpl); 1878 u8 opcode = cxgbit_skcb_rx_opcode(skb); 1879 bool ref = true; 1880 1881 switch (opcode) { 1882 case CPL_FW4_ACK: 1883 cxgbit_skcb_rx_backlog_fn(skb) = cxgbit_fw4_ack; 1884 ref = false; 1885 break; 1886 case CPL_PEER_CLOSE: 1887 cxgbit_skcb_rx_backlog_fn(skb) = cxgbit_peer_close; 1888 break; 1889 case CPL_CLOSE_CON_RPL: 1890 cxgbit_skcb_rx_backlog_fn(skb) = cxgbit_close_con_rpl; 1891 break; 1892 case CPL_ABORT_REQ_RSS: 1893 cxgbit_skcb_rx_backlog_fn(skb) = cxgbit_abort_req_rss; 1894 break; 1895 case CPL_ABORT_RPL_RSS: 1896 cxgbit_skcb_rx_backlog_fn(skb) = cxgbit_abort_rpl_rss; 1897 break; 1898 default: 1899 goto rel_skb; 1900 } 1901 1902 csk = lookup_tid(t, tid); 1903 if (unlikely(!csk)) { 1904 pr_err("can't find conn. for tid %u.\n", tid); 1905 goto rel_skb; 1906 } 1907 1908 if (ref) 1909 cxgbit_process_rx_cpl(csk, skb); 1910 else 1911 __cxgbit_process_rx_cpl(csk, skb); 1912 1913 return; 1914 rel_skb: 1915 __kfree_skb(skb); 1916 } 1917 1918 cxgbit_cplhandler_func cxgbit_cplhandlers[NUM_CPL_CMDS] = { 1919 [CPL_PASS_OPEN_RPL] = cxgbit_pass_open_rpl, 1920 [CPL_CLOSE_LISTSRV_RPL] = cxgbit_close_listsrv_rpl, 1921 [CPL_PASS_ACCEPT_REQ] = cxgbit_pass_accept_req, 1922 [CPL_PASS_ESTABLISH] = cxgbit_pass_establish, 1923 [CPL_SET_TCB_RPL] = cxgbit_set_tcb_rpl, 1924 [CPL_RX_DATA] = cxgbit_rx_data, 1925 [CPL_FW4_ACK] = cxgbit_rx_cpl, 1926 [CPL_PEER_CLOSE] = cxgbit_rx_cpl, 1927 [CPL_CLOSE_CON_RPL] = cxgbit_rx_cpl, 1928 [CPL_ABORT_REQ_RSS] = cxgbit_rx_cpl, 1929 [CPL_ABORT_RPL_RSS] = cxgbit_rx_cpl, 1930 }; 1931