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Linux 4.19-rc7
[linux-2.6/btrfs-unstable.git] / drivers / target / iscsi / cxgbit / cxgbit_cm.c
blob8de16016b6de90441c2892367f1b1d9b949382c3
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 };
(deprecated) Btrfs devel tree