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