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 static void __cxgbit_free_conn(struct cxgbit_sock *csk); 602 603 void cxgbit_free_np(struct iscsi_np *np) 604 { 605 struct cxgbit_np *cnp = np->np_context; 606 struct cxgbit_sock *csk, *tmp; 607 608 cnp->com.state = CSK_STATE_DEAD; 609 if (cnp->com.cdev) 610 cxgbit_free_cdev_np(cnp); 611 else 612 cxgbit_free_all_np(cnp); 613 614 spin_lock_bh(&cnp->np_accept_lock); 615 list_for_each_entry_safe(csk, tmp, &cnp->np_accept_list, accept_node) { 616 list_del_init(&csk->accept_node); 617 __cxgbit_free_conn(csk); 618 } 619 spin_unlock_bh(&cnp->np_accept_lock); 620 621 np->np_context = NULL; 622 cxgbit_put_cnp(cnp); 623 } 624 625 static void cxgbit_send_halfclose(struct cxgbit_sock *csk) 626 { 627 struct sk_buff *skb; 628 u32 len = roundup(sizeof(struct cpl_close_con_req), 16); 629 630 skb = alloc_skb(len, GFP_ATOMIC); 631 if (!skb) 632 return; 633 634 cxgb_mk_close_con_req(skb, len, csk->tid, csk->txq_idx, 635 NULL, NULL); 636 637 cxgbit_skcb_flags(skb) |= SKCBF_TX_FLAG_COMPL; 638 __skb_queue_tail(&csk->txq, skb); 639 cxgbit_push_tx_frames(csk); 640 } 641 642 static void cxgbit_arp_failure_discard(void *handle, struct sk_buff *skb) 643 { 644 pr_debug("%s cxgbit_device %p\n", __func__, handle); 645 kfree_skb(skb); 646 } 647 648 static void cxgbit_abort_arp_failure(void *handle, struct sk_buff *skb) 649 { 650 struct cxgbit_device *cdev = handle; 651 struct cpl_abort_req *req = cplhdr(skb); 652 653 pr_debug("%s cdev %p\n", __func__, cdev); 654 req->cmd = CPL_ABORT_NO_RST; 655 cxgbit_ofld_send(cdev, skb); 656 } 657 658 static int cxgbit_send_abort_req(struct cxgbit_sock *csk) 659 { 660 struct sk_buff *skb; 661 u32 len = roundup(sizeof(struct cpl_abort_req), 16); 662 663 pr_debug("%s: csk %p tid %u; state %d\n", 664 __func__, csk, csk->tid, csk->com.state); 665 666 __skb_queue_purge(&csk->txq); 667 668 if (!test_and_set_bit(CSK_TX_DATA_SENT, &csk->com.flags)) 669 cxgbit_send_tx_flowc_wr(csk); 670 671 skb = __skb_dequeue(&csk->skbq); 672 cxgb_mk_abort_req(skb, len, csk->tid, csk->txq_idx, 673 csk->com.cdev, cxgbit_abort_arp_failure); 674 675 return cxgbit_l2t_send(csk->com.cdev, skb, csk->l2t); 676 } 677 678 static void 679 __cxgbit_abort_conn(struct cxgbit_sock *csk, struct sk_buff *skb) 680 { 681 __kfree_skb(skb); 682 683 if (csk->com.state != CSK_STATE_ESTABLISHED) 684 goto no_abort; 685 686 set_bit(CSK_ABORT_RPL_WAIT, &csk->com.flags); 687 csk->com.state = CSK_STATE_ABORTING; 688 689 cxgbit_send_abort_req(csk); 690 691 return; 692 693 no_abort: 694 cxgbit_wake_up(&csk->com.wr_wait, __func__, CPL_ERR_NONE); 695 cxgbit_put_csk(csk); 696 } 697 698 void cxgbit_abort_conn(struct cxgbit_sock *csk) 699 { 700 struct sk_buff *skb = alloc_skb(0, GFP_KERNEL | __GFP_NOFAIL); 701 702 cxgbit_get_csk(csk); 703 cxgbit_init_wr_wait(&csk->com.wr_wait); 704 705 spin_lock_bh(&csk->lock); 706 if (csk->lock_owner) { 707 cxgbit_skcb_rx_backlog_fn(skb) = __cxgbit_abort_conn; 708 __skb_queue_tail(&csk->backlogq, skb); 709 } else { 710 __cxgbit_abort_conn(csk, skb); 711 } 712 spin_unlock_bh(&csk->lock); 713 714 cxgbit_wait_for_reply(csk->com.cdev, &csk->com.wr_wait, 715 csk->tid, 600, __func__); 716 } 717 718 static void __cxgbit_free_conn(struct cxgbit_sock *csk) 719 { 720 struct iscsi_conn *conn = csk->conn; 721 bool release = false; 722 723 pr_debug("%s: state %d\n", 724 __func__, csk->com.state); 725 726 spin_lock_bh(&csk->lock); 727 switch (csk->com.state) { 728 case CSK_STATE_ESTABLISHED: 729 if (conn && (conn->conn_state == TARG_CONN_STATE_IN_LOGOUT)) { 730 csk->com.state = CSK_STATE_CLOSING; 731 cxgbit_send_halfclose(csk); 732 } else { 733 csk->com.state = CSK_STATE_ABORTING; 734 cxgbit_send_abort_req(csk); 735 } 736 break; 737 case CSK_STATE_CLOSING: 738 csk->com.state = CSK_STATE_MORIBUND; 739 cxgbit_send_halfclose(csk); 740 break; 741 case CSK_STATE_DEAD: 742 release = true; 743 break; 744 default: 745 pr_err("%s: csk %p; state %d\n", 746 __func__, csk, csk->com.state); 747 } 748 spin_unlock_bh(&csk->lock); 749 750 if (release) 751 cxgbit_put_csk(csk); 752 } 753 754 void cxgbit_free_conn(struct iscsi_conn *conn) 755 { 756 __cxgbit_free_conn(conn->context); 757 } 758 759 static void cxgbit_set_emss(struct cxgbit_sock *csk, u16 opt) 760 { 761 csk->emss = csk->com.cdev->lldi.mtus[TCPOPT_MSS_G(opt)] - 762 ((csk->com.remote_addr.ss_family == AF_INET) ? 763 sizeof(struct iphdr) : sizeof(struct ipv6hdr)) - 764 sizeof(struct tcphdr); 765 csk->mss = csk->emss; 766 if (TCPOPT_TSTAMP_G(opt)) 767 csk->emss -= round_up(TCPOLEN_TIMESTAMP, 4); 768 if (csk->emss < 128) 769 csk->emss = 128; 770 if (csk->emss & 7) 771 pr_info("Warning: misaligned mtu idx %u mss %u emss=%u\n", 772 TCPOPT_MSS_G(opt), csk->mss, csk->emss); 773 pr_debug("%s mss_idx %u mss %u emss=%u\n", __func__, TCPOPT_MSS_G(opt), 774 csk->mss, csk->emss); 775 } 776 777 static void cxgbit_free_skb(struct cxgbit_sock *csk) 778 { 779 struct sk_buff *skb; 780 781 __skb_queue_purge(&csk->txq); 782 __skb_queue_purge(&csk->rxq); 783 __skb_queue_purge(&csk->backlogq); 784 __skb_queue_purge(&csk->ppodq); 785 __skb_queue_purge(&csk->skbq); 786 787 while ((skb = cxgbit_sock_dequeue_wr(csk))) 788 kfree_skb(skb); 789 790 __kfree_skb(csk->lro_hskb); 791 } 792 793 void _cxgbit_free_csk(struct kref *kref) 794 { 795 struct cxgbit_sock *csk; 796 struct cxgbit_device *cdev; 797 798 csk = container_of(kref, struct cxgbit_sock, kref); 799 800 pr_debug("%s csk %p state %d\n", __func__, csk, csk->com.state); 801 802 if (csk->com.local_addr.ss_family == AF_INET6) { 803 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) 804 &csk->com.local_addr; 805 cxgb4_clip_release(csk->com.cdev->lldi.ports[0], 806 (const u32 *) 807 &sin6->sin6_addr.s6_addr, 1); 808 } 809 810 cxgb4_remove_tid(csk->com.cdev->lldi.tids, 0, csk->tid, 811 csk->com.local_addr.ss_family); 812 dst_release(csk->dst); 813 cxgb4_l2t_release(csk->l2t); 814 815 cdev = csk->com.cdev; 816 spin_lock_bh(&cdev->cskq.lock); 817 list_del(&csk->list); 818 spin_unlock_bh(&cdev->cskq.lock); 819 820 cxgbit_free_skb(csk); 821 cxgbit_put_cnp(csk->cnp); 822 cxgbit_put_cdev(cdev); 823 824 kfree(csk); 825 } 826 827 static void cxgbit_set_tcp_window(struct cxgbit_sock *csk, struct port_info *pi) 828 { 829 unsigned int linkspeed; 830 u8 scale; 831 832 linkspeed = pi->link_cfg.speed; 833 scale = linkspeed / SPEED_10000; 834 835 #define CXGBIT_10G_RCV_WIN (256 * 1024) 836 csk->rcv_win = CXGBIT_10G_RCV_WIN; 837 if (scale) 838 csk->rcv_win *= scale; 839 840 #define CXGBIT_10G_SND_WIN (256 * 1024) 841 csk->snd_win = CXGBIT_10G_SND_WIN; 842 if (scale) 843 csk->snd_win *= scale; 844 845 pr_debug("%s snd_win %d rcv_win %d\n", 846 __func__, csk->snd_win, csk->rcv_win); 847 } 848 849 #ifdef CONFIG_CHELSIO_T4_DCB 850 static u8 cxgbit_get_iscsi_dcb_state(struct net_device *ndev) 851 { 852 return ndev->dcbnl_ops->getstate(ndev); 853 } 854 855 static int cxgbit_select_priority(int pri_mask) 856 { 857 if (!pri_mask) 858 return 0; 859 860 return (ffs(pri_mask) - 1); 861 } 862 863 static u8 cxgbit_get_iscsi_dcb_priority(struct net_device *ndev, u16 local_port) 864 { 865 int ret; 866 u8 caps; 867 868 struct dcb_app iscsi_dcb_app = { 869 .protocol = local_port 870 }; 871 872 ret = (int)ndev->dcbnl_ops->getcap(ndev, DCB_CAP_ATTR_DCBX, &caps); 873 874 if (ret) 875 return 0; 876 877 if (caps & DCB_CAP_DCBX_VER_IEEE) { 878 iscsi_dcb_app.selector = IEEE_8021QAZ_APP_SEL_ANY; 879 880 ret = dcb_ieee_getapp_mask(ndev, &iscsi_dcb_app); 881 882 } else if (caps & DCB_CAP_DCBX_VER_CEE) { 883 iscsi_dcb_app.selector = DCB_APP_IDTYPE_PORTNUM; 884 885 ret = dcb_getapp(ndev, &iscsi_dcb_app); 886 } 887 888 pr_info("iSCSI priority is set to %u\n", cxgbit_select_priority(ret)); 889 890 return cxgbit_select_priority(ret); 891 } 892 #endif 893 894 static int 895 cxgbit_offload_init(struct cxgbit_sock *csk, int iptype, __u8 *peer_ip, 896 u16 local_port, struct dst_entry *dst, 897 struct cxgbit_device *cdev) 898 { 899 struct neighbour *n; 900 int ret, step; 901 struct net_device *ndev; 902 u16 rxq_idx, port_id; 903 #ifdef CONFIG_CHELSIO_T4_DCB 904 u8 priority = 0; 905 #endif 906 907 n = dst_neigh_lookup(dst, peer_ip); 908 if (!n) 909 return -ENODEV; 910 911 rcu_read_lock(); 912 if (!(n->nud_state & NUD_VALID)) 913 neigh_event_send(n, NULL); 914 915 ret = -ENOMEM; 916 if (n->dev->flags & IFF_LOOPBACK) { 917 if (iptype == 4) 918 ndev = cxgbit_ipv4_netdev(*(__be32 *)peer_ip); 919 else if (IS_ENABLED(CONFIG_IPV6)) 920 ndev = cxgbit_ipv6_netdev((struct in6_addr *)peer_ip); 921 else 922 ndev = NULL; 923 924 if (!ndev) { 925 ret = -ENODEV; 926 goto out; 927 } 928 929 csk->l2t = cxgb4_l2t_get(cdev->lldi.l2t, 930 n, ndev, 0); 931 if (!csk->l2t) 932 goto out; 933 csk->mtu = ndev->mtu; 934 csk->tx_chan = cxgb4_port_chan(ndev); 935 csk->smac_idx = cxgb4_tp_smt_idx(cdev->lldi.adapter_type, 936 cxgb4_port_viid(ndev)); 937 step = cdev->lldi.ntxq / 938 cdev->lldi.nchan; 939 csk->txq_idx = cxgb4_port_idx(ndev) * step; 940 step = cdev->lldi.nrxq / 941 cdev->lldi.nchan; 942 csk->ctrlq_idx = cxgb4_port_idx(ndev); 943 csk->rss_qid = cdev->lldi.rxq_ids[ 944 cxgb4_port_idx(ndev) * step]; 945 csk->port_id = cxgb4_port_idx(ndev); 946 cxgbit_set_tcp_window(csk, 947 (struct port_info *)netdev_priv(ndev)); 948 } else { 949 ndev = cxgbit_get_real_dev(n->dev); 950 if (!ndev) { 951 ret = -ENODEV; 952 goto out; 953 } 954 955 #ifdef CONFIG_CHELSIO_T4_DCB 956 if (cxgbit_get_iscsi_dcb_state(ndev)) 957 priority = cxgbit_get_iscsi_dcb_priority(ndev, 958 local_port); 959 960 csk->dcb_priority = priority; 961 962 csk->l2t = cxgb4_l2t_get(cdev->lldi.l2t, n, ndev, priority); 963 #else 964 csk->l2t = cxgb4_l2t_get(cdev->lldi.l2t, n, ndev, 0); 965 #endif 966 if (!csk->l2t) 967 goto out; 968 port_id = cxgb4_port_idx(ndev); 969 csk->mtu = dst_mtu(dst); 970 csk->tx_chan = cxgb4_port_chan(ndev); 971 csk->smac_idx = cxgb4_tp_smt_idx(cdev->lldi.adapter_type, 972 cxgb4_port_viid(ndev)); 973 step = cdev->lldi.ntxq / 974 cdev->lldi.nports; 975 csk->txq_idx = (port_id * step) + 976 (cdev->selectq[port_id][0]++ % step); 977 csk->ctrlq_idx = cxgb4_port_idx(ndev); 978 step = cdev->lldi.nrxq / 979 cdev->lldi.nports; 980 rxq_idx = (port_id * step) + 981 (cdev->selectq[port_id][1]++ % step); 982 csk->rss_qid = cdev->lldi.rxq_ids[rxq_idx]; 983 csk->port_id = port_id; 984 cxgbit_set_tcp_window(csk, 985 (struct port_info *)netdev_priv(ndev)); 986 } 987 ret = 0; 988 out: 989 rcu_read_unlock(); 990 neigh_release(n); 991 return ret; 992 } 993 994 int cxgbit_ofld_send(struct cxgbit_device *cdev, struct sk_buff *skb) 995 { 996 int ret = 0; 997 998 if (!test_bit(CDEV_STATE_UP, &cdev->flags)) { 999 kfree_skb(skb); 1000 pr_err("%s - device not up - dropping\n", __func__); 1001 return -EIO; 1002 } 1003 1004 ret = cxgb4_ofld_send(cdev->lldi.ports[0], skb); 1005 if (ret < 0) 1006 kfree_skb(skb); 1007 return ret < 0 ? ret : 0; 1008 } 1009 1010 static void cxgbit_release_tid(struct cxgbit_device *cdev, u32 tid) 1011 { 1012 u32 len = roundup(sizeof(struct cpl_tid_release), 16); 1013 struct sk_buff *skb; 1014 1015 skb = alloc_skb(len, GFP_ATOMIC); 1016 if (!skb) 1017 return; 1018 1019 cxgb_mk_tid_release(skb, len, tid, 0); 1020 cxgbit_ofld_send(cdev, skb); 1021 } 1022 1023 int 1024 cxgbit_l2t_send(struct cxgbit_device *cdev, struct sk_buff *skb, 1025 struct l2t_entry *l2e) 1026 { 1027 int ret = 0; 1028 1029 if (!test_bit(CDEV_STATE_UP, &cdev->flags)) { 1030 kfree_skb(skb); 1031 pr_err("%s - device not up - dropping\n", __func__); 1032 return -EIO; 1033 } 1034 1035 ret = cxgb4_l2t_send(cdev->lldi.ports[0], skb, l2e); 1036 if (ret < 0) 1037 kfree_skb(skb); 1038 return ret < 0 ? ret : 0; 1039 } 1040 1041 static void cxgbit_send_rx_credits(struct cxgbit_sock *csk, struct sk_buff *skb) 1042 { 1043 if (csk->com.state != CSK_STATE_ESTABLISHED) { 1044 __kfree_skb(skb); 1045 return; 1046 } 1047 1048 cxgbit_ofld_send(csk->com.cdev, skb); 1049 } 1050 1051 /* 1052 * CPL connection rx data ack: host -> 1053 * Send RX credits through an RX_DATA_ACK CPL message. 1054 * Returns the number of credits sent. 1055 */ 1056 int cxgbit_rx_data_ack(struct cxgbit_sock *csk) 1057 { 1058 struct sk_buff *skb; 1059 u32 len = roundup(sizeof(struct cpl_rx_data_ack), 16); 1060 u32 credit_dack; 1061 1062 skb = alloc_skb(len, GFP_KERNEL); 1063 if (!skb) 1064 return -1; 1065 1066 credit_dack = RX_DACK_CHANGE_F | RX_DACK_MODE_V(1) | 1067 RX_CREDITS_V(csk->rx_credits); 1068 1069 cxgb_mk_rx_data_ack(skb, len, csk->tid, csk->ctrlq_idx, 1070 credit_dack); 1071 1072 csk->rx_credits = 0; 1073 1074 spin_lock_bh(&csk->lock); 1075 if (csk->lock_owner) { 1076 cxgbit_skcb_rx_backlog_fn(skb) = cxgbit_send_rx_credits; 1077 __skb_queue_tail(&csk->backlogq, skb); 1078 spin_unlock_bh(&csk->lock); 1079 return 0; 1080 } 1081 1082 cxgbit_send_rx_credits(csk, skb); 1083 spin_unlock_bh(&csk->lock); 1084 1085 return 0; 1086 } 1087 1088 #define FLOWC_WR_NPARAMS_MIN 9 1089 #define FLOWC_WR_NPARAMS_MAX 11 1090 static int cxgbit_alloc_csk_skb(struct cxgbit_sock *csk) 1091 { 1092 struct sk_buff *skb; 1093 u32 len, flowclen; 1094 u8 i; 1095 1096 flowclen = offsetof(struct fw_flowc_wr, 1097 mnemval[FLOWC_WR_NPARAMS_MAX]); 1098 1099 len = max_t(u32, sizeof(struct cpl_abort_req), 1100 sizeof(struct cpl_abort_rpl)); 1101 1102 len = max(len, flowclen); 1103 len = roundup(len, 16); 1104 1105 for (i = 0; i < 3; i++) { 1106 skb = alloc_skb(len, GFP_ATOMIC); 1107 if (!skb) 1108 goto out; 1109 __skb_queue_tail(&csk->skbq, skb); 1110 } 1111 1112 skb = alloc_skb(LRO_SKB_MIN_HEADROOM, GFP_ATOMIC); 1113 if (!skb) 1114 goto out; 1115 1116 memset(skb->data, 0, LRO_SKB_MIN_HEADROOM); 1117 csk->lro_hskb = skb; 1118 1119 return 0; 1120 out: 1121 __skb_queue_purge(&csk->skbq); 1122 return -ENOMEM; 1123 } 1124 1125 static void 1126 cxgbit_pass_accept_rpl(struct cxgbit_sock *csk, struct cpl_pass_accept_req *req) 1127 { 1128 struct sk_buff *skb; 1129 const struct tcphdr *tcph; 1130 struct cpl_t5_pass_accept_rpl *rpl5; 1131 struct cxgb4_lld_info *lldi = &csk->com.cdev->lldi; 1132 unsigned int len = roundup(sizeof(*rpl5), 16); 1133 unsigned int mtu_idx; 1134 u64 opt0; 1135 u32 opt2, hlen; 1136 u32 wscale; 1137 u32 win; 1138 1139 pr_debug("%s csk %p tid %u\n", __func__, csk, csk->tid); 1140 1141 skb = alloc_skb(len, GFP_ATOMIC); 1142 if (!skb) { 1143 cxgbit_put_csk(csk); 1144 return; 1145 } 1146 1147 rpl5 = __skb_put_zero(skb, len); 1148 1149 INIT_TP_WR(rpl5, csk->tid); 1150 OPCODE_TID(rpl5) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL, 1151 csk->tid)); 1152 cxgb_best_mtu(csk->com.cdev->lldi.mtus, csk->mtu, &mtu_idx, 1153 req->tcpopt.tstamp, 1154 (csk->com.remote_addr.ss_family == AF_INET) ? 0 : 1); 1155 wscale = cxgb_compute_wscale(csk->rcv_win); 1156 /* 1157 * Specify the largest window that will fit in opt0. The 1158 * remainder will be specified in the rx_data_ack. 1159 */ 1160 win = csk->rcv_win >> 10; 1161 if (win > RCV_BUFSIZ_M) 1162 win = RCV_BUFSIZ_M; 1163 opt0 = TCAM_BYPASS_F | 1164 WND_SCALE_V(wscale) | 1165 MSS_IDX_V(mtu_idx) | 1166 L2T_IDX_V(csk->l2t->idx) | 1167 TX_CHAN_V(csk->tx_chan) | 1168 SMAC_SEL_V(csk->smac_idx) | 1169 DSCP_V(csk->tos >> 2) | 1170 ULP_MODE_V(ULP_MODE_ISCSI) | 1171 RCV_BUFSIZ_V(win); 1172 1173 opt2 = RX_CHANNEL_V(0) | 1174 RSS_QUEUE_VALID_F | RSS_QUEUE_V(csk->rss_qid); 1175 1176 if (!is_t5(lldi->adapter_type)) 1177 opt2 |= RX_FC_DISABLE_F; 1178 1179 if (req->tcpopt.tstamp) 1180 opt2 |= TSTAMPS_EN_F; 1181 if (req->tcpopt.sack) 1182 opt2 |= SACK_EN_F; 1183 if (wscale) 1184 opt2 |= WND_SCALE_EN_F; 1185 1186 hlen = ntohl(req->hdr_len); 1187 1188 if (is_t5(lldi->adapter_type)) 1189 tcph = (struct tcphdr *)((u8 *)(req + 1) + 1190 ETH_HDR_LEN_G(hlen) + IP_HDR_LEN_G(hlen)); 1191 else 1192 tcph = (struct tcphdr *)((u8 *)(req + 1) + 1193 T6_ETH_HDR_LEN_G(hlen) + T6_IP_HDR_LEN_G(hlen)); 1194 1195 if (tcph->ece && tcph->cwr) 1196 opt2 |= CCTRL_ECN_V(1); 1197 1198 opt2 |= RX_COALESCE_V(3); 1199 opt2 |= CONG_CNTRL_V(CONG_ALG_NEWRENO); 1200 1201 opt2 |= T5_ISS_F; 1202 rpl5->iss = cpu_to_be32((prandom_u32() & ~7UL) - 1); 1203 1204 opt2 |= T5_OPT_2_VALID_F; 1205 1206 rpl5->opt0 = cpu_to_be64(opt0); 1207 rpl5->opt2 = cpu_to_be32(opt2); 1208 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->ctrlq_idx); 1209 t4_set_arp_err_handler(skb, NULL, cxgbit_arp_failure_discard); 1210 cxgbit_l2t_send(csk->com.cdev, skb, csk->l2t); 1211 } 1212 1213 static void 1214 cxgbit_pass_accept_req(struct cxgbit_device *cdev, struct sk_buff *skb) 1215 { 1216 struct cxgbit_sock *csk = NULL; 1217 struct cxgbit_np *cnp; 1218 struct cpl_pass_accept_req *req = cplhdr(skb); 1219 unsigned int stid = PASS_OPEN_TID_G(ntohl(req->tos_stid)); 1220 struct tid_info *t = cdev->lldi.tids; 1221 unsigned int tid = GET_TID(req); 1222 u16 peer_mss = ntohs(req->tcpopt.mss); 1223 unsigned short hdrs; 1224 1225 struct dst_entry *dst; 1226 __u8 local_ip[16], peer_ip[16]; 1227 __be16 local_port, peer_port; 1228 int ret; 1229 int iptype; 1230 1231 pr_debug("%s: cdev = %p; stid = %u; tid = %u\n", 1232 __func__, cdev, stid, tid); 1233 1234 cnp = lookup_stid(t, stid); 1235 if (!cnp) { 1236 pr_err("%s connect request on invalid stid %d\n", 1237 __func__, stid); 1238 goto rel_skb; 1239 } 1240 1241 if (cnp->com.state != CSK_STATE_LISTEN) { 1242 pr_err("%s - listening parent not in CSK_STATE_LISTEN\n", 1243 __func__); 1244 goto reject; 1245 } 1246 1247 csk = lookup_tid(t, tid); 1248 if (csk) { 1249 pr_err("%s csk not null tid %u\n", 1250 __func__, tid); 1251 goto rel_skb; 1252 } 1253 1254 cxgb_get_4tuple(req, cdev->lldi.adapter_type, &iptype, local_ip, 1255 peer_ip, &local_port, &peer_port); 1256 1257 /* Find output route */ 1258 if (iptype == 4) { 1259 pr_debug("%s parent sock %p tid %u laddr %pI4 raddr %pI4 " 1260 "lport %d rport %d peer_mss %d\n" 1261 , __func__, cnp, tid, 1262 local_ip, peer_ip, ntohs(local_port), 1263 ntohs(peer_port), peer_mss); 1264 dst = cxgb_find_route(&cdev->lldi, cxgbit_get_real_dev, 1265 *(__be32 *)local_ip, 1266 *(__be32 *)peer_ip, 1267 local_port, peer_port, 1268 PASS_OPEN_TOS_G(ntohl(req->tos_stid))); 1269 } else { 1270 pr_debug("%s parent sock %p tid %u laddr %pI6 raddr %pI6 " 1271 "lport %d rport %d peer_mss %d\n" 1272 , __func__, cnp, tid, 1273 local_ip, peer_ip, ntohs(local_port), 1274 ntohs(peer_port), peer_mss); 1275 dst = cxgb_find_route6(&cdev->lldi, cxgbit_get_real_dev, 1276 local_ip, peer_ip, 1277 local_port, peer_port, 1278 PASS_OPEN_TOS_G(ntohl(req->tos_stid)), 1279 ((struct sockaddr_in6 *) 1280 &cnp->com.local_addr)->sin6_scope_id); 1281 } 1282 if (!dst) { 1283 pr_err("%s - failed to find dst entry!\n", 1284 __func__); 1285 goto reject; 1286 } 1287 1288 csk = kzalloc(sizeof(*csk), GFP_ATOMIC); 1289 if (!csk) { 1290 dst_release(dst); 1291 goto rel_skb; 1292 } 1293 1294 ret = cxgbit_offload_init(csk, iptype, peer_ip, ntohs(local_port), 1295 dst, cdev); 1296 if (ret) { 1297 pr_err("%s - failed to allocate l2t entry!\n", 1298 __func__); 1299 dst_release(dst); 1300 kfree(csk); 1301 goto reject; 1302 } 1303 1304 kref_init(&csk->kref); 1305 init_completion(&csk->com.wr_wait.completion); 1306 1307 INIT_LIST_HEAD(&csk->accept_node); 1308 1309 hdrs = (iptype == 4 ? sizeof(struct iphdr) : sizeof(struct ipv6hdr)) + 1310 sizeof(struct tcphdr) + (req->tcpopt.tstamp ? 12 : 0); 1311 if (peer_mss && csk->mtu > (peer_mss + hdrs)) 1312 csk->mtu = peer_mss + hdrs; 1313 1314 csk->com.state = CSK_STATE_CONNECTING; 1315 csk->com.cdev = cdev; 1316 csk->cnp = cnp; 1317 csk->tos = PASS_OPEN_TOS_G(ntohl(req->tos_stid)); 1318 csk->dst = dst; 1319 csk->tid = tid; 1320 csk->wr_cred = cdev->lldi.wr_cred - 1321 DIV_ROUND_UP(sizeof(struct cpl_abort_req), 16); 1322 csk->wr_max_cred = csk->wr_cred; 1323 csk->wr_una_cred = 0; 1324 1325 if (iptype == 4) { 1326 struct sockaddr_in *sin = (struct sockaddr_in *) 1327 &csk->com.local_addr; 1328 sin->sin_family = AF_INET; 1329 sin->sin_port = local_port; 1330 sin->sin_addr.s_addr = *(__be32 *)local_ip; 1331 1332 sin = (struct sockaddr_in *)&csk->com.remote_addr; 1333 sin->sin_family = AF_INET; 1334 sin->sin_port = peer_port; 1335 sin->sin_addr.s_addr = *(__be32 *)peer_ip; 1336 } else { 1337 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) 1338 &csk->com.local_addr; 1339 1340 sin6->sin6_family = PF_INET6; 1341 sin6->sin6_port = local_port; 1342 memcpy(sin6->sin6_addr.s6_addr, local_ip, 16); 1343 cxgb4_clip_get(cdev->lldi.ports[0], 1344 (const u32 *)&sin6->sin6_addr.s6_addr, 1345 1); 1346 1347 sin6 = (struct sockaddr_in6 *)&csk->com.remote_addr; 1348 sin6->sin6_family = PF_INET6; 1349 sin6->sin6_port = peer_port; 1350 memcpy(sin6->sin6_addr.s6_addr, peer_ip, 16); 1351 } 1352 1353 skb_queue_head_init(&csk->rxq); 1354 skb_queue_head_init(&csk->txq); 1355 skb_queue_head_init(&csk->ppodq); 1356 skb_queue_head_init(&csk->backlogq); 1357 skb_queue_head_init(&csk->skbq); 1358 cxgbit_sock_reset_wr_list(csk); 1359 spin_lock_init(&csk->lock); 1360 init_waitqueue_head(&csk->waitq); 1361 init_waitqueue_head(&csk->ack_waitq); 1362 csk->lock_owner = false; 1363 1364 if (cxgbit_alloc_csk_skb(csk)) { 1365 dst_release(dst); 1366 kfree(csk); 1367 goto rel_skb; 1368 } 1369 1370 cxgbit_get_cnp(cnp); 1371 cxgbit_get_cdev(cdev); 1372 1373 spin_lock(&cdev->cskq.lock); 1374 list_add_tail(&csk->list, &cdev->cskq.list); 1375 spin_unlock(&cdev->cskq.lock); 1376 cxgb4_insert_tid(t, csk, tid, csk->com.local_addr.ss_family); 1377 cxgbit_pass_accept_rpl(csk, req); 1378 goto rel_skb; 1379 1380 reject: 1381 cxgbit_release_tid(cdev, tid); 1382 rel_skb: 1383 __kfree_skb(skb); 1384 } 1385 1386 static u32 1387 cxgbit_tx_flowc_wr_credits(struct cxgbit_sock *csk, u32 *nparamsp, 1388 u32 *flowclenp) 1389 { 1390 u32 nparams, flowclen16, flowclen; 1391 1392 nparams = FLOWC_WR_NPARAMS_MIN; 1393 1394 if (csk->snd_wscale) 1395 nparams++; 1396 1397 #ifdef CONFIG_CHELSIO_T4_DCB 1398 nparams++; 1399 #endif 1400 flowclen = offsetof(struct fw_flowc_wr, mnemval[nparams]); 1401 flowclen16 = DIV_ROUND_UP(flowclen, 16); 1402 flowclen = flowclen16 * 16; 1403 /* 1404 * Return the number of 16-byte credits used by the flowc request. 1405 * Pass back the nparams and actual flowc length if requested. 1406 */ 1407 if (nparamsp) 1408 *nparamsp = nparams; 1409 if (flowclenp) 1410 *flowclenp = flowclen; 1411 return flowclen16; 1412 } 1413 1414 u32 cxgbit_send_tx_flowc_wr(struct cxgbit_sock *csk) 1415 { 1416 struct cxgbit_device *cdev = csk->com.cdev; 1417 struct fw_flowc_wr *flowc; 1418 u32 nparams, flowclen16, flowclen; 1419 struct sk_buff *skb; 1420 u8 index; 1421 1422 #ifdef CONFIG_CHELSIO_T4_DCB 1423 u16 vlan = ((struct l2t_entry *)csk->l2t)->vlan; 1424 #endif 1425 1426 flowclen16 = cxgbit_tx_flowc_wr_credits(csk, &nparams, &flowclen); 1427 1428 skb = __skb_dequeue(&csk->skbq); 1429 flowc = __skb_put_zero(skb, flowclen); 1430 1431 flowc->op_to_nparams = cpu_to_be32(FW_WR_OP_V(FW_FLOWC_WR) | 1432 FW_FLOWC_WR_NPARAMS_V(nparams)); 1433 flowc->flowid_len16 = cpu_to_be32(FW_WR_LEN16_V(flowclen16) | 1434 FW_WR_FLOWID_V(csk->tid)); 1435 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN; 1436 flowc->mnemval[0].val = cpu_to_be32(FW_PFVF_CMD_PFN_V 1437 (csk->com.cdev->lldi.pf)); 1438 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH; 1439 flowc->mnemval[1].val = cpu_to_be32(csk->tx_chan); 1440 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT; 1441 flowc->mnemval[2].val = cpu_to_be32(csk->tx_chan); 1442 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID; 1443 flowc->mnemval[3].val = cpu_to_be32(csk->rss_qid); 1444 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT; 1445 flowc->mnemval[4].val = cpu_to_be32(csk->snd_nxt); 1446 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT; 1447 flowc->mnemval[5].val = cpu_to_be32(csk->rcv_nxt); 1448 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF; 1449 flowc->mnemval[6].val = cpu_to_be32(csk->snd_win); 1450 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS; 1451 flowc->mnemval[7].val = cpu_to_be32(csk->emss); 1452 1453 flowc->mnemval[8].mnemonic = FW_FLOWC_MNEM_TXDATAPLEN_MAX; 1454 if (test_bit(CDEV_ISO_ENABLE, &cdev->flags)) 1455 flowc->mnemval[8].val = cpu_to_be32(CXGBIT_MAX_ISO_PAYLOAD); 1456 else 1457 flowc->mnemval[8].val = cpu_to_be32(16384); 1458 1459 index = 9; 1460 1461 if (csk->snd_wscale) { 1462 flowc->mnemval[index].mnemonic = FW_FLOWC_MNEM_RCV_SCALE; 1463 flowc->mnemval[index].val = cpu_to_be32(csk->snd_wscale); 1464 index++; 1465 } 1466 1467 #ifdef CONFIG_CHELSIO_T4_DCB 1468 flowc->mnemval[index].mnemonic = FW_FLOWC_MNEM_DCBPRIO; 1469 if (vlan == VLAN_NONE) { 1470 pr_warn("csk %u without VLAN Tag on DCB Link\n", csk->tid); 1471 flowc->mnemval[index].val = cpu_to_be32(0); 1472 } else 1473 flowc->mnemval[index].val = cpu_to_be32( 1474 (vlan & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT); 1475 #endif 1476 1477 pr_debug("%s: csk %p; tx_chan = %u; rss_qid = %u; snd_seq = %u;" 1478 " rcv_seq = %u; snd_win = %u; emss = %u\n", 1479 __func__, csk, csk->tx_chan, csk->rss_qid, csk->snd_nxt, 1480 csk->rcv_nxt, csk->snd_win, csk->emss); 1481 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->txq_idx); 1482 cxgbit_ofld_send(csk->com.cdev, skb); 1483 return flowclen16; 1484 } 1485 1486 int cxgbit_setup_conn_digest(struct cxgbit_sock *csk) 1487 { 1488 struct sk_buff *skb; 1489 struct cpl_set_tcb_field *req; 1490 u8 hcrc = csk->submode & CXGBIT_SUBMODE_HCRC; 1491 u8 dcrc = csk->submode & CXGBIT_SUBMODE_DCRC; 1492 unsigned int len = roundup(sizeof(*req), 16); 1493 int ret; 1494 1495 skb = alloc_skb(len, GFP_KERNEL); 1496 if (!skb) 1497 return -ENOMEM; 1498 1499 /* set up ulp submode */ 1500 req = __skb_put_zero(skb, len); 1501 1502 INIT_TP_WR(req, csk->tid); 1503 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid)); 1504 req->reply_ctrl = htons(NO_REPLY_V(0) | QUEUENO_V(csk->rss_qid)); 1505 req->word_cookie = htons(0); 1506 req->mask = cpu_to_be64(0x3 << 4); 1507 req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) | 1508 (dcrc ? ULP_CRC_DATA : 0)) << 4); 1509 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->ctrlq_idx); 1510 1511 cxgbit_get_csk(csk); 1512 cxgbit_init_wr_wait(&csk->com.wr_wait); 1513 1514 cxgbit_ofld_send(csk->com.cdev, skb); 1515 1516 ret = cxgbit_wait_for_reply(csk->com.cdev, 1517 &csk->com.wr_wait, 1518 csk->tid, 5, __func__); 1519 if (ret) 1520 return -1; 1521 1522 return 0; 1523 } 1524 1525 int cxgbit_setup_conn_pgidx(struct cxgbit_sock *csk, u32 pg_idx) 1526 { 1527 struct sk_buff *skb; 1528 struct cpl_set_tcb_field *req; 1529 unsigned int len = roundup(sizeof(*req), 16); 1530 int ret; 1531 1532 skb = alloc_skb(len, GFP_KERNEL); 1533 if (!skb) 1534 return -ENOMEM; 1535 1536 req = __skb_put_zero(skb, len); 1537 1538 INIT_TP_WR(req, csk->tid); 1539 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid)); 1540 req->reply_ctrl = htons(NO_REPLY_V(0) | QUEUENO_V(csk->rss_qid)); 1541 req->word_cookie = htons(0); 1542 req->mask = cpu_to_be64(0x3 << 8); 1543 req->val = cpu_to_be64(pg_idx << 8); 1544 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->ctrlq_idx); 1545 1546 cxgbit_get_csk(csk); 1547 cxgbit_init_wr_wait(&csk->com.wr_wait); 1548 1549 cxgbit_ofld_send(csk->com.cdev, skb); 1550 1551 ret = cxgbit_wait_for_reply(csk->com.cdev, 1552 &csk->com.wr_wait, 1553 csk->tid, 5, __func__); 1554 if (ret) 1555 return -1; 1556 1557 return 0; 1558 } 1559 1560 static void 1561 cxgbit_pass_open_rpl(struct cxgbit_device *cdev, struct sk_buff *skb) 1562 { 1563 struct cpl_pass_open_rpl *rpl = cplhdr(skb); 1564 struct tid_info *t = cdev->lldi.tids; 1565 unsigned int stid = GET_TID(rpl); 1566 struct cxgbit_np *cnp = lookup_stid(t, stid); 1567 1568 pr_debug("%s: cnp = %p; stid = %u; status = %d\n", 1569 __func__, cnp, stid, rpl->status); 1570 1571 if (!cnp) { 1572 pr_info("%s stid %d lookup failure\n", __func__, stid); 1573 goto rel_skb; 1574 } 1575 1576 cxgbit_wake_up(&cnp->com.wr_wait, __func__, rpl->status); 1577 cxgbit_put_cnp(cnp); 1578 rel_skb: 1579 __kfree_skb(skb); 1580 } 1581 1582 static void 1583 cxgbit_close_listsrv_rpl(struct cxgbit_device *cdev, struct sk_buff *skb) 1584 { 1585 struct cpl_close_listsvr_rpl *rpl = cplhdr(skb); 1586 struct tid_info *t = cdev->lldi.tids; 1587 unsigned int stid = GET_TID(rpl); 1588 struct cxgbit_np *cnp = lookup_stid(t, stid); 1589 1590 pr_debug("%s: cnp = %p; stid = %u; status = %d\n", 1591 __func__, cnp, stid, rpl->status); 1592 1593 if (!cnp) { 1594 pr_info("%s stid %d lookup failure\n", __func__, stid); 1595 goto rel_skb; 1596 } 1597 1598 cxgbit_wake_up(&cnp->com.wr_wait, __func__, rpl->status); 1599 cxgbit_put_cnp(cnp); 1600 rel_skb: 1601 __kfree_skb(skb); 1602 } 1603 1604 static void 1605 cxgbit_pass_establish(struct cxgbit_device *cdev, struct sk_buff *skb) 1606 { 1607 struct cpl_pass_establish *req = cplhdr(skb); 1608 struct tid_info *t = cdev->lldi.tids; 1609 unsigned int tid = GET_TID(req); 1610 struct cxgbit_sock *csk; 1611 struct cxgbit_np *cnp; 1612 u16 tcp_opt = be16_to_cpu(req->tcp_opt); 1613 u32 snd_isn = be32_to_cpu(req->snd_isn); 1614 u32 rcv_isn = be32_to_cpu(req->rcv_isn); 1615 1616 csk = lookup_tid(t, tid); 1617 if (unlikely(!csk)) { 1618 pr_err("can't find connection for tid %u.\n", tid); 1619 goto rel_skb; 1620 } 1621 cnp = csk->cnp; 1622 1623 pr_debug("%s: csk %p; tid %u; cnp %p\n", 1624 __func__, csk, tid, cnp); 1625 1626 csk->write_seq = snd_isn; 1627 csk->snd_una = snd_isn; 1628 csk->snd_nxt = snd_isn; 1629 1630 csk->rcv_nxt = rcv_isn; 1631 1632 if (csk->rcv_win > (RCV_BUFSIZ_M << 10)) 1633 csk->rx_credits = (csk->rcv_win - (RCV_BUFSIZ_M << 10)); 1634 1635 csk->snd_wscale = TCPOPT_SND_WSCALE_G(tcp_opt); 1636 cxgbit_set_emss(csk, tcp_opt); 1637 dst_confirm(csk->dst); 1638 csk->com.state = CSK_STATE_ESTABLISHED; 1639 spin_lock_bh(&cnp->np_accept_lock); 1640 list_add_tail(&csk->accept_node, &cnp->np_accept_list); 1641 spin_unlock_bh(&cnp->np_accept_lock); 1642 complete(&cnp->accept_comp); 1643 rel_skb: 1644 __kfree_skb(skb); 1645 } 1646 1647 static void cxgbit_queue_rx_skb(struct cxgbit_sock *csk, struct sk_buff *skb) 1648 { 1649 cxgbit_skcb_flags(skb) = 0; 1650 spin_lock_bh(&csk->rxq.lock); 1651 __skb_queue_tail(&csk->rxq, skb); 1652 spin_unlock_bh(&csk->rxq.lock); 1653 wake_up(&csk->waitq); 1654 } 1655 1656 static void cxgbit_peer_close(struct cxgbit_sock *csk, struct sk_buff *skb) 1657 { 1658 pr_debug("%s: csk %p; tid %u; state %d\n", 1659 __func__, csk, csk->tid, csk->com.state); 1660 1661 switch (csk->com.state) { 1662 case CSK_STATE_ESTABLISHED: 1663 csk->com.state = CSK_STATE_CLOSING; 1664 cxgbit_queue_rx_skb(csk, skb); 1665 return; 1666 case CSK_STATE_CLOSING: 1667 /* simultaneous close */ 1668 csk->com.state = CSK_STATE_MORIBUND; 1669 break; 1670 case CSK_STATE_MORIBUND: 1671 csk->com.state = CSK_STATE_DEAD; 1672 cxgbit_put_csk(csk); 1673 break; 1674 case CSK_STATE_ABORTING: 1675 break; 1676 default: 1677 pr_info("%s: cpl_peer_close in bad state %d\n", 1678 __func__, csk->com.state); 1679 } 1680 1681 __kfree_skb(skb); 1682 } 1683 1684 static void cxgbit_close_con_rpl(struct cxgbit_sock *csk, struct sk_buff *skb) 1685 { 1686 pr_debug("%s: csk %p; tid %u; state %d\n", 1687 __func__, csk, csk->tid, csk->com.state); 1688 1689 switch (csk->com.state) { 1690 case CSK_STATE_CLOSING: 1691 csk->com.state = CSK_STATE_MORIBUND; 1692 break; 1693 case CSK_STATE_MORIBUND: 1694 csk->com.state = CSK_STATE_DEAD; 1695 cxgbit_put_csk(csk); 1696 break; 1697 case CSK_STATE_ABORTING: 1698 case CSK_STATE_DEAD: 1699 break; 1700 default: 1701 pr_info("%s: cpl_close_con_rpl in bad state %d\n", 1702 __func__, csk->com.state); 1703 } 1704 1705 __kfree_skb(skb); 1706 } 1707 1708 static void cxgbit_abort_req_rss(struct cxgbit_sock *csk, struct sk_buff *skb) 1709 { 1710 struct cpl_abort_req_rss *hdr = cplhdr(skb); 1711 unsigned int tid = GET_TID(hdr); 1712 struct sk_buff *rpl_skb; 1713 bool release = false; 1714 bool wakeup_thread = false; 1715 u32 len = roundup(sizeof(struct cpl_abort_rpl), 16); 1716 1717 pr_debug("%s: csk %p; tid %u; state %d\n", 1718 __func__, csk, tid, csk->com.state); 1719 1720 if (cxgb_is_neg_adv(hdr->status)) { 1721 pr_err("%s: got neg advise %d on tid %u\n", 1722 __func__, hdr->status, tid); 1723 goto rel_skb; 1724 } 1725 1726 switch (csk->com.state) { 1727 case CSK_STATE_CONNECTING: 1728 case CSK_STATE_MORIBUND: 1729 csk->com.state = CSK_STATE_DEAD; 1730 release = true; 1731 break; 1732 case CSK_STATE_ESTABLISHED: 1733 csk->com.state = CSK_STATE_DEAD; 1734 wakeup_thread = true; 1735 break; 1736 case CSK_STATE_CLOSING: 1737 csk->com.state = CSK_STATE_DEAD; 1738 if (!csk->conn) 1739 release = true; 1740 break; 1741 case CSK_STATE_ABORTING: 1742 break; 1743 default: 1744 pr_info("%s: cpl_abort_req_rss in bad state %d\n", 1745 __func__, csk->com.state); 1746 csk->com.state = CSK_STATE_DEAD; 1747 } 1748 1749 __skb_queue_purge(&csk->txq); 1750 1751 if (!test_and_set_bit(CSK_TX_DATA_SENT, &csk->com.flags)) 1752 cxgbit_send_tx_flowc_wr(csk); 1753 1754 rpl_skb = __skb_dequeue(&csk->skbq); 1755 1756 cxgb_mk_abort_rpl(rpl_skb, len, csk->tid, csk->txq_idx); 1757 cxgbit_ofld_send(csk->com.cdev, rpl_skb); 1758 1759 if (wakeup_thread) { 1760 cxgbit_queue_rx_skb(csk, skb); 1761 return; 1762 } 1763 1764 if (release) 1765 cxgbit_put_csk(csk); 1766 rel_skb: 1767 __kfree_skb(skb); 1768 } 1769 1770 static void cxgbit_abort_rpl_rss(struct cxgbit_sock *csk, struct sk_buff *skb) 1771 { 1772 struct cpl_abort_rpl_rss *rpl = cplhdr(skb); 1773 1774 pr_debug("%s: csk %p; tid %u; state %d\n", 1775 __func__, csk, csk->tid, csk->com.state); 1776 1777 switch (csk->com.state) { 1778 case CSK_STATE_ABORTING: 1779 csk->com.state = CSK_STATE_DEAD; 1780 if (test_bit(CSK_ABORT_RPL_WAIT, &csk->com.flags)) 1781 cxgbit_wake_up(&csk->com.wr_wait, __func__, 1782 rpl->status); 1783 cxgbit_put_csk(csk); 1784 break; 1785 default: 1786 pr_info("%s: cpl_abort_rpl_rss in state %d\n", 1787 __func__, csk->com.state); 1788 } 1789 1790 __kfree_skb(skb); 1791 } 1792 1793 static bool cxgbit_credit_err(const struct cxgbit_sock *csk) 1794 { 1795 const struct sk_buff *skb = csk->wr_pending_head; 1796 u32 credit = 0; 1797 1798 if (unlikely(csk->wr_cred > csk->wr_max_cred)) { 1799 pr_err("csk 0x%p, tid %u, credit %u > %u\n", 1800 csk, csk->tid, csk->wr_cred, csk->wr_max_cred); 1801 return true; 1802 } 1803 1804 while (skb) { 1805 credit += (__force u32)skb->csum; 1806 skb = cxgbit_skcb_tx_wr_next(skb); 1807 } 1808 1809 if (unlikely((csk->wr_cred + credit) != csk->wr_max_cred)) { 1810 pr_err("csk 0x%p, tid %u, credit %u + %u != %u.\n", 1811 csk, csk->tid, csk->wr_cred, 1812 credit, csk->wr_max_cred); 1813 1814 return true; 1815 } 1816 1817 return false; 1818 } 1819 1820 static void cxgbit_fw4_ack(struct cxgbit_sock *csk, struct sk_buff *skb) 1821 { 1822 struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)cplhdr(skb); 1823 u32 credits = rpl->credits; 1824 u32 snd_una = ntohl(rpl->snd_una); 1825 1826 csk->wr_cred += credits; 1827 if (csk->wr_una_cred > (csk->wr_max_cred - csk->wr_cred)) 1828 csk->wr_una_cred = csk->wr_max_cred - csk->wr_cred; 1829 1830 while (credits) { 1831 struct sk_buff *p = cxgbit_sock_peek_wr(csk); 1832 const u32 csum = (__force u32)p->csum; 1833 1834 if (unlikely(!p)) { 1835 pr_err("csk 0x%p,%u, cr %u,%u+%u, empty.\n", 1836 csk, csk->tid, credits, 1837 csk->wr_cred, csk->wr_una_cred); 1838 break; 1839 } 1840 1841 if (unlikely(credits < csum)) { 1842 pr_warn("csk 0x%p,%u, cr %u,%u+%u, < %u.\n", 1843 csk, csk->tid, 1844 credits, csk->wr_cred, csk->wr_una_cred, 1845 csum); 1846 p->csum = (__force __wsum)(csum - credits); 1847 break; 1848 } 1849 1850 cxgbit_sock_dequeue_wr(csk); 1851 credits -= csum; 1852 kfree_skb(p); 1853 } 1854 1855 if (unlikely(cxgbit_credit_err(csk))) { 1856 cxgbit_queue_rx_skb(csk, skb); 1857 return; 1858 } 1859 1860 if (rpl->seq_vld & CPL_FW4_ACK_FLAGS_SEQVAL) { 1861 if (unlikely(before(snd_una, csk->snd_una))) { 1862 pr_warn("csk 0x%p,%u, snd_una %u/%u.", 1863 csk, csk->tid, snd_una, 1864 csk->snd_una); 1865 goto rel_skb; 1866 } 1867 1868 if (csk->snd_una != snd_una) { 1869 csk->snd_una = snd_una; 1870 dst_confirm(csk->dst); 1871 wake_up(&csk->ack_waitq); 1872 } 1873 } 1874 1875 if (skb_queue_len(&csk->txq)) 1876 cxgbit_push_tx_frames(csk); 1877 1878 rel_skb: 1879 __kfree_skb(skb); 1880 } 1881 1882 static void cxgbit_set_tcb_rpl(struct cxgbit_device *cdev, struct sk_buff *skb) 1883 { 1884 struct cxgbit_sock *csk; 1885 struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data; 1886 unsigned int tid = GET_TID(rpl); 1887 struct cxgb4_lld_info *lldi = &cdev->lldi; 1888 struct tid_info *t = lldi->tids; 1889 1890 csk = lookup_tid(t, tid); 1891 if (unlikely(!csk)) { 1892 pr_err("can't find connection for tid %u.\n", tid); 1893 goto rel_skb; 1894 } else { 1895 cxgbit_wake_up(&csk->com.wr_wait, __func__, rpl->status); 1896 } 1897 1898 cxgbit_put_csk(csk); 1899 rel_skb: 1900 __kfree_skb(skb); 1901 } 1902 1903 static void cxgbit_rx_data(struct cxgbit_device *cdev, struct sk_buff *skb) 1904 { 1905 struct cxgbit_sock *csk; 1906 struct cpl_rx_data *cpl = cplhdr(skb); 1907 unsigned int tid = GET_TID(cpl); 1908 struct cxgb4_lld_info *lldi = &cdev->lldi; 1909 struct tid_info *t = lldi->tids; 1910 1911 csk = lookup_tid(t, tid); 1912 if (unlikely(!csk)) { 1913 pr_err("can't find conn. for tid %u.\n", tid); 1914 goto rel_skb; 1915 } 1916 1917 cxgbit_queue_rx_skb(csk, skb); 1918 return; 1919 rel_skb: 1920 __kfree_skb(skb); 1921 } 1922 1923 static void 1924 __cxgbit_process_rx_cpl(struct cxgbit_sock *csk, struct sk_buff *skb) 1925 { 1926 spin_lock(&csk->lock); 1927 if (csk->lock_owner) { 1928 __skb_queue_tail(&csk->backlogq, skb); 1929 spin_unlock(&csk->lock); 1930 return; 1931 } 1932 1933 cxgbit_skcb_rx_backlog_fn(skb)(csk, skb); 1934 spin_unlock(&csk->lock); 1935 } 1936 1937 static void cxgbit_process_rx_cpl(struct cxgbit_sock *csk, struct sk_buff *skb) 1938 { 1939 cxgbit_get_csk(csk); 1940 __cxgbit_process_rx_cpl(csk, skb); 1941 cxgbit_put_csk(csk); 1942 } 1943 1944 static void cxgbit_rx_cpl(struct cxgbit_device *cdev, struct sk_buff *skb) 1945 { 1946 struct cxgbit_sock *csk; 1947 struct cpl_tx_data *cpl = cplhdr(skb); 1948 struct cxgb4_lld_info *lldi = &cdev->lldi; 1949 struct tid_info *t = lldi->tids; 1950 unsigned int tid = GET_TID(cpl); 1951 u8 opcode = cxgbit_skcb_rx_opcode(skb); 1952 bool ref = true; 1953 1954 switch (opcode) { 1955 case CPL_FW4_ACK: 1956 cxgbit_skcb_rx_backlog_fn(skb) = cxgbit_fw4_ack; 1957 ref = false; 1958 break; 1959 case CPL_PEER_CLOSE: 1960 cxgbit_skcb_rx_backlog_fn(skb) = cxgbit_peer_close; 1961 break; 1962 case CPL_CLOSE_CON_RPL: 1963 cxgbit_skcb_rx_backlog_fn(skb) = cxgbit_close_con_rpl; 1964 break; 1965 case CPL_ABORT_REQ_RSS: 1966 cxgbit_skcb_rx_backlog_fn(skb) = cxgbit_abort_req_rss; 1967 break; 1968 case CPL_ABORT_RPL_RSS: 1969 cxgbit_skcb_rx_backlog_fn(skb) = cxgbit_abort_rpl_rss; 1970 break; 1971 default: 1972 goto rel_skb; 1973 } 1974 1975 csk = lookup_tid(t, tid); 1976 if (unlikely(!csk)) { 1977 pr_err("can't find conn. for tid %u.\n", tid); 1978 goto rel_skb; 1979 } 1980 1981 if (ref) 1982 cxgbit_process_rx_cpl(csk, skb); 1983 else 1984 __cxgbit_process_rx_cpl(csk, skb); 1985 1986 return; 1987 rel_skb: 1988 __kfree_skb(skb); 1989 } 1990 1991 cxgbit_cplhandler_func cxgbit_cplhandlers[NUM_CPL_CMDS] = { 1992 [CPL_PASS_OPEN_RPL] = cxgbit_pass_open_rpl, 1993 [CPL_CLOSE_LISTSRV_RPL] = cxgbit_close_listsrv_rpl, 1994 [CPL_PASS_ACCEPT_REQ] = cxgbit_pass_accept_req, 1995 [CPL_PASS_ESTABLISH] = cxgbit_pass_establish, 1996 [CPL_SET_TCB_RPL] = cxgbit_set_tcb_rpl, 1997 [CPL_RX_DATA] = cxgbit_rx_data, 1998 [CPL_FW4_ACK] = cxgbit_rx_cpl, 1999 [CPL_PEER_CLOSE] = cxgbit_rx_cpl, 2000 [CPL_CLOSE_CON_RPL] = cxgbit_rx_cpl, 2001 [CPL_ABORT_REQ_RSS] = cxgbit_rx_cpl, 2002 [CPL_ABORT_RPL_RSS] = cxgbit_rx_cpl, 2003 }; 2004