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Merge tag 'for-linus-20170825' of git://git.infradead.org/linux-mtd
[mirror_ubuntu-artful-kernel.git] / drivers / target / iscsi / cxgbit / cxgbit_cm.c
CommitLineData
9730ffcb
VP		 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
85e42b04 27#include <libcxgb_cm.h>
9730ffcb
VP		 28#include "cxgbit.h"
29#include "clip_tbl.h"
30
31static 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
37static void
38cxgbit_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
51static int
52cxgbit_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 }
69out:
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
9730ffcb
VP		 76static int cxgbit_np_hashfn(const struct cxgbit_np *cnp)
77{
78 return ((unsigned long)cnp >> 10) & (NP_INFO_HASH_SIZE - 1);
79}
80
81static struct np_info *
82cxgbit_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
101static int
102cxgbit_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
119static 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
138void _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
146static int
147cxgbit_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
198static int
199cxgbit_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
231struct 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
251static 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
265static 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
276static 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
293static 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);
316out:
317 rcu_read_unlock();
318 return cdev;
319}
320
321static 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
345static 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
378static 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;
396out:
397 mutex_unlock(&cdev_list_lock);
398 return ret;
399}
400
401static 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
428int 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
470static void
471cxgbit_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
479int 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
485accept_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
520static 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
567static 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
581static 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);
597out:
598 mutex_unlock(&cdev_list_lock);
599}
600
601void 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
615static void cxgbit_send_halfclose(struct cxgbit_sock *csk)
616{
617 struct sk_buff *skb;
29fb6f42 618 u32 len = roundup(sizeof(struct cpl_close_con_req), 16);
9730ffcb
VP		 619
620 skb = alloc_skb(len, GFP_ATOMIC);
621 if (!skb)
622 return;
623
29fb6f42
VP		 624 cxgb_mk_close_con_req(skb, len, csk->tid, csk->txq_idx,
625 NULL, NULL);
9730ffcb
VP		 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
632static 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
638static 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
648static int cxgbit_send_abort_req(struct cxgbit_sock *csk)
649{
9730ffcb 650 struct sk_buff *skb;
a7e1a97f 651 u32 len = roundup(sizeof(struct cpl_abort_req), 16);
9730ffcb
VP		 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);
a7e1a97f
VP		 662 cxgb_mk_abort_req(skb, len, csk->tid, csk->txq_idx,
663 csk->com.cdev, cxgbit_abort_arp_failure);
664
9730ffcb
VP		 665 return cxgbit_l2t_send(csk->com.cdev, skb, csk->l2t);
666}
667
668void cxgbit_free_conn(struct iscsi_conn *conn)
669{
670 struct cxgbit_sock *csk = conn->context;
671 bool release = false;
672
673 pr_debug("%s: state %d\n",
674 __func__, csk->com.state);
675
676 spin_lock_bh(&csk->lock);
677 switch (csk->com.state) {
678 case CSK_STATE_ESTABLISHED:
679 if (conn->conn_state == TARG_CONN_STATE_IN_LOGOUT) {
680 csk->com.state = CSK_STATE_CLOSING;
681 cxgbit_send_halfclose(csk);
682 } else {
683 csk->com.state = CSK_STATE_ABORTING;
684 cxgbit_send_abort_req(csk);
685 }
686 break;
687 case CSK_STATE_CLOSING:
688 csk->com.state = CSK_STATE_MORIBUND;
689 cxgbit_send_halfclose(csk);
690 break;
691 case CSK_STATE_DEAD:
692 release = true;
693 break;
694 default:
695 pr_err("%s: csk %p; state %d\n",
696 __func__, csk, csk->com.state);
697 }
698 spin_unlock_bh(&csk->lock);
699
700 if (release)
701 cxgbit_put_csk(csk);
702}
703
704static void cxgbit_set_emss(struct cxgbit_sock *csk, u16 opt)
705{
706 csk->emss = csk->com.cdev->lldi.mtus[TCPOPT_MSS_G(opt)] -
707 ((csk->com.remote_addr.ss_family == AF_INET) ?
708 sizeof(struct iphdr) : sizeof(struct ipv6hdr)) -
709 sizeof(struct tcphdr);
710 csk->mss = csk->emss;
711 if (TCPOPT_TSTAMP_G(opt))
712 csk->emss -= round_up(TCPOLEN_TIMESTAMP, 4);
713 if (csk->emss < 128)
714 csk->emss = 128;
715 if (csk->emss & 7)
716 pr_info("Warning: misaligned mtu idx %u mss %u emss=%u\n",
717 TCPOPT_MSS_G(opt), csk->mss, csk->emss);
718 pr_debug("%s mss_idx %u mss %u emss=%u\n", __func__, TCPOPT_MSS_G(opt),
719 csk->mss, csk->emss);
720}
721
722static void cxgbit_free_skb(struct cxgbit_sock *csk)
723{
724 struct sk_buff *skb;
725
726 __skb_queue_purge(&csk->txq);
727 __skb_queue_purge(&csk->rxq);
728 __skb_queue_purge(&csk->backlogq);
729 __skb_queue_purge(&csk->ppodq);
730 __skb_queue_purge(&csk->skbq);
731
732 while ((skb = cxgbit_sock_dequeue_wr(csk)))
733 kfree_skb(skb);
734
735 __kfree_skb(csk->lro_hskb);
736}
737
738void _cxgbit_free_csk(struct kref *kref)
739{
740 struct cxgbit_sock *csk;
741 struct cxgbit_device *cdev;
742
743 csk = container_of(kref, struct cxgbit_sock, kref);
744
745 pr_debug("%s csk %p state %d\n", __func__, csk, csk->com.state);
746
747 if (csk->com.local_addr.ss_family == AF_INET6) {
748 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)
749 &csk->com.local_addr;
750 cxgb4_clip_release(csk->com.cdev->lldi.ports[0],
751 (const u32 *)
752 &sin6->sin6_addr.s6_addr, 1);
753 }
754
1dec4cec
GG		 755 cxgb4_remove_tid(csk->com.cdev->lldi.tids, 0, csk->tid,
756 csk->com.local_addr.ss_family);
9730ffcb
VP		 757 dst_release(csk->dst);
758 cxgb4_l2t_release(csk->l2t);
759
760 cdev = csk->com.cdev;
761 spin_lock_bh(&cdev->cskq.lock);
762 list_del(&csk->list);
763 spin_unlock_bh(&cdev->cskq.lock);
764
765 cxgbit_free_skb(csk);
766 cxgbit_put_cdev(cdev);
767
768 kfree(csk);
769}
770
9730ffcb
VP		 771static void cxgbit_set_tcp_window(struct cxgbit_sock *csk, struct port_info *pi)
772{
773 unsigned int linkspeed;
774 u8 scale;
775
776 linkspeed = pi->link_cfg.speed;
777 scale = linkspeed / SPEED_10000;
778
779#define CXGBIT_10G_RCV_WIN (256 * 1024)
780 csk->rcv_win = CXGBIT_10G_RCV_WIN;
781 if (scale)
782 csk->rcv_win *= scale;
783
784#define CXGBIT_10G_SND_WIN (256 * 1024)
785 csk->snd_win = CXGBIT_10G_SND_WIN;
786 if (scale)
787 csk->snd_win *= scale;
788
789 pr_debug("%s snd_win %d rcv_win %d\n",
790 __func__, csk->snd_win, csk->rcv_win);
791}
792
793#ifdef CONFIG_CHELSIO_T4_DCB
794static u8 cxgbit_get_iscsi_dcb_state(struct net_device *ndev)
795{
796 return ndev->dcbnl_ops->getstate(ndev);
797}
798
799static int cxgbit_select_priority(int pri_mask)
800{
801 if (!pri_mask)
802 return 0;
803
804 return (ffs(pri_mask) - 1);
805}
806
807static u8 cxgbit_get_iscsi_dcb_priority(struct net_device *ndev, u16 local_port)
808{
809 int ret;
810 u8 caps;
811
812 struct dcb_app iscsi_dcb_app = {
813 .protocol = local_port
814 };
815
816 ret = (int)ndev->dcbnl_ops->getcap(ndev, DCB_CAP_ATTR_DCBX, &caps);
817
818 if (ret)
819 return 0;
820
821 if (caps & DCB_CAP_DCBX_VER_IEEE) {
822 iscsi_dcb_app.selector = IEEE_8021QAZ_APP_SEL_ANY;
823
824 ret = dcb_ieee_getapp_mask(ndev, &iscsi_dcb_app);
825
826 } else if (caps & DCB_CAP_DCBX_VER_CEE) {
827 iscsi_dcb_app.selector = DCB_APP_IDTYPE_PORTNUM;
828
829 ret = dcb_getapp(ndev, &iscsi_dcb_app);
830 }
831
832 pr_info("iSCSI priority is set to %u\n", cxgbit_select_priority(ret));
833
834 return cxgbit_select_priority(ret);
835}
836#endif
837
838static int
839cxgbit_offload_init(struct cxgbit_sock *csk, int iptype, __u8 *peer_ip,
840 u16 local_port, struct dst_entry *dst,
841 struct cxgbit_device *cdev)
842{
843 struct neighbour *n;
844 int ret, step;
845 struct net_device *ndev;
846 u16 rxq_idx, port_id;
847#ifdef CONFIG_CHELSIO_T4_DCB
848 u8 priority = 0;
849#endif
850
851 n = dst_neigh_lookup(dst, peer_ip);
852 if (!n)
853 return -ENODEV;
854
855 rcu_read_lock();
856 ret = -ENOMEM;
857 if (n->dev->flags & IFF_LOOPBACK) {
858 if (iptype == 4)
859 ndev = cxgbit_ipv4_netdev(*(__be32 *)peer_ip);
860 else if (IS_ENABLED(CONFIG_IPV6))
861 ndev = cxgbit_ipv6_netdev((struct in6_addr *)peer_ip);
862 else
863 ndev = NULL;
864
865 if (!ndev) {
866 ret = -ENODEV;
867 goto out;
868 }
869
870 csk->l2t = cxgb4_l2t_get(cdev->lldi.l2t,
871 n, ndev, 0);
872 if (!csk->l2t)
873 goto out;
874 csk->mtu = ndev->mtu;
875 csk->tx_chan = cxgb4_port_chan(ndev);
3da1110f
VP		 876 csk->smac_idx = cxgb4_tp_smt_idx(cdev->lldi.adapter_type,
877 cxgb4_port_viid(ndev));
9730ffcb
VP		 878 step = cdev->lldi.ntxq /
879 cdev->lldi.nchan;
880 csk->txq_idx = cxgb4_port_idx(ndev) * step;
881 step = cdev->lldi.nrxq /
882 cdev->lldi.nchan;
883 csk->ctrlq_idx = cxgb4_port_idx(ndev);
884 csk->rss_qid = cdev->lldi.rxq_ids[
885 cxgb4_port_idx(ndev) * step];
886 csk->port_id = cxgb4_port_idx(ndev);
887 cxgbit_set_tcp_window(csk,
888 (struct port_info *)netdev_priv(ndev));
889 } else {
890 ndev = cxgbit_get_real_dev(n->dev);
891 if (!ndev) {
892 ret = -ENODEV;
893 goto out;
894 }
895
896#ifdef CONFIG_CHELSIO_T4_DCB
897 if (cxgbit_get_iscsi_dcb_state(ndev))
898 priority = cxgbit_get_iscsi_dcb_priority(ndev,
899 local_port);
900
901 csk->dcb_priority = priority;
902
903 csk->l2t = cxgb4_l2t_get(cdev->lldi.l2t, n, ndev, priority);
904#else
905 csk->l2t = cxgb4_l2t_get(cdev->lldi.l2t, n, ndev, 0);
906#endif
907 if (!csk->l2t)
908 goto out;
909 port_id = cxgb4_port_idx(ndev);
910 csk->mtu = dst_mtu(dst);
911 csk->tx_chan = cxgb4_port_chan(ndev);
3da1110f
VP		 912 csk->smac_idx = cxgb4_tp_smt_idx(cdev->lldi.adapter_type,
913 cxgb4_port_viid(ndev));
9730ffcb
VP		 914 step = cdev->lldi.ntxq /
915 cdev->lldi.nports;
916 csk->txq_idx = (port_id * step) +
917 (cdev->selectq[port_id][0]++ % step);
918 csk->ctrlq_idx = cxgb4_port_idx(ndev);
919 step = cdev->lldi.nrxq /
920 cdev->lldi.nports;
921 rxq_idx = (port_id * step) +
922 (cdev->selectq[port_id][1]++ % step);
923 csk->rss_qid = cdev->lldi.rxq_ids[rxq_idx];
924 csk->port_id = port_id;
925 cxgbit_set_tcp_window(csk,
926 (struct port_info *)netdev_priv(ndev));
927 }
928 ret = 0;
929out:
930 rcu_read_unlock();
931 neigh_release(n);
932 return ret;
933}
934
935int cxgbit_ofld_send(struct cxgbit_device *cdev, struct sk_buff *skb)
936{
937 int ret = 0;
938
939 if (!test_bit(CDEV_STATE_UP, &cdev->flags)) {
940 kfree_skb(skb);
941 pr_err("%s - device not up - dropping\n", __func__);
942 return -EIO;
943 }
944
945 ret = cxgb4_ofld_send(cdev->lldi.ports[0], skb);
946 if (ret < 0)
947 kfree_skb(skb);
948 return ret < 0 ? ret : 0;
949}
950
951static void cxgbit_release_tid(struct cxgbit_device *cdev, u32 tid)
952{
a1a23454 953 u32 len = roundup(sizeof(struct cpl_tid_release), 16);
9730ffcb
VP		 954 struct sk_buff *skb;
955
956 skb = alloc_skb(len, GFP_ATOMIC);
957 if (!skb)
958 return;
959
a1a23454 960 cxgb_mk_tid_release(skb, len, tid, 0);
9730ffcb
VP		 961 cxgbit_ofld_send(cdev, skb);
962}
963
964int
965cxgbit_l2t_send(struct cxgbit_device *cdev, struct sk_buff *skb,
966 struct l2t_entry *l2e)
967{
968 int ret = 0;
969
970 if (!test_bit(CDEV_STATE_UP, &cdev->flags)) {
971 kfree_skb(skb);
972 pr_err("%s - device not up - dropping\n", __func__);
973 return -EIO;
974 }
975
976 ret = cxgb4_l2t_send(cdev->lldi.ports[0], skb, l2e);
977 if (ret < 0)
978 kfree_skb(skb);
979 return ret < 0 ? ret : 0;
980}
981
9730ffcb
VP		 982static void cxgbit_send_rx_credits(struct cxgbit_sock *csk, struct sk_buff *skb)
983{
984 if (csk->com.state != CSK_STATE_ESTABLISHED) {
985 __kfree_skb(skb);
986 return;
987 }
988
989 cxgbit_ofld_send(csk->com.cdev, skb);
990}
991
992/*
993 * CPL connection rx data ack: host ->
994 * Send RX credits through an RX_DATA_ACK CPL message.
995 * Returns the number of credits sent.
996 */
997int cxgbit_rx_data_ack(struct cxgbit_sock *csk)
998{
999 struct sk_buff *skb;
6e3b6fc2
VP		 1000 u32 len = roundup(sizeof(struct cpl_rx_data_ack), 16);
1001 u32 credit_dack;
9730ffcb
VP		 1002
1003 skb = alloc_skb(len, GFP_KERNEL);
1004 if (!skb)
1005 return -1;
1006
6e3b6fc2
VP		 1007 credit_dack = RX_DACK_CHANGE_F | RX_DACK_MODE_V(1) |
1008 RX_CREDITS_V(csk->rx_credits);
9730ffcb 1009
6e3b6fc2
VP		 1010 cxgb_mk_rx_data_ack(skb, len, csk->tid, csk->ctrlq_idx,
1011 credit_dack);
9730ffcb
VP		 1012
1013 csk->rx_credits = 0;
1014
1015 spin_lock_bh(&csk->lock);
1016 if (csk->lock_owner) {
1017 cxgbit_skcb_rx_backlog_fn(skb) = cxgbit_send_rx_credits;
1018 __skb_queue_tail(&csk->backlogq, skb);
1019 spin_unlock_bh(&csk->lock);
1020 return 0;
1021 }
1022
1023 cxgbit_send_rx_credits(csk, skb);
1024 spin_unlock_bh(&csk->lock);
1025
1026 return 0;
1027}
1028
1029#define FLOWC_WR_NPARAMS_MIN 9
1030#define FLOWC_WR_NPARAMS_MAX 11
1031static int cxgbit_alloc_csk_skb(struct cxgbit_sock *csk)
1032{
1033 struct sk_buff *skb;
1034 u32 len, flowclen;
1035 u8 i;
1036
1037 flowclen = offsetof(struct fw_flowc_wr,
1038 mnemval[FLOWC_WR_NPARAMS_MAX]);
1039
1040 len = max_t(u32, sizeof(struct cpl_abort_req),
1041 sizeof(struct cpl_abort_rpl));
1042
1043 len = max(len, flowclen);
1044 len = roundup(len, 16);
1045
1046 for (i = 0; i < 3; i++) {
1047 skb = alloc_skb(len, GFP_ATOMIC);
1048 if (!skb)
1049 goto out;
1050 __skb_queue_tail(&csk->skbq, skb);
1051 }
1052
1053 skb = alloc_skb(LRO_SKB_MIN_HEADROOM, GFP_ATOMIC);
1054 if (!skb)
1055 goto out;
1056
1057 memset(skb->data, 0, LRO_SKB_MIN_HEADROOM);
1058 csk->lro_hskb = skb;
1059
1060 return 0;
1061out:
1062 __skb_queue_purge(&csk->skbq);
1063 return -ENOMEM;
1064}
1065
9730ffcb
VP		 1066static void
1067cxgbit_pass_accept_rpl(struct cxgbit_sock *csk, struct cpl_pass_accept_req *req)
1068{
1069 struct sk_buff *skb;
1070 const struct tcphdr *tcph;
1071 struct cpl_t5_pass_accept_rpl *rpl5;
d88b504e 1072 struct cxgb4_lld_info *lldi = &csk->com.cdev->lldi;
9730ffcb
VP		 1073 unsigned int len = roundup(sizeof(*rpl5), 16);
1074 unsigned int mtu_idx;
1075 u64 opt0;
1076 u32 opt2, hlen;
1077 u32 wscale;
1078 u32 win;
1079
1080 pr_debug("%s csk %p tid %u\n", __func__, csk, csk->tid);
1081
1082 skb = alloc_skb(len, GFP_ATOMIC);
1083 if (!skb) {
1084 cxgbit_put_csk(csk);
1085 return;
1086 }
1087
de77b966 1088 rpl5 = __skb_put_zero(skb, len);
9730ffcb
VP		 1089
1090 INIT_TP_WR(rpl5, csk->tid);
1091 OPCODE_TID(rpl5) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
1092 csk->tid));
44c6d069
VP		 1093 cxgb_best_mtu(csk->com.cdev->lldi.mtus, csk->mtu, &mtu_idx,
1094 req->tcpopt.tstamp,
1095 (csk->com.remote_addr.ss_family == AF_INET) ? 0 : 1);
cc516700 1096 wscale = cxgb_compute_wscale(csk->rcv_win);
9730ffcb
VP		 1097 /*
1098 * Specify the largest window that will fit in opt0. The
1099 * remainder will be specified in the rx_data_ack.
1100 */
1101 win = csk->rcv_win >> 10;
1102 if (win > RCV_BUFSIZ_M)
1103 win = RCV_BUFSIZ_M;
1104 opt0 = TCAM_BYPASS_F |
1105 WND_SCALE_V(wscale) |
1106 MSS_IDX_V(mtu_idx) |
1107 L2T_IDX_V(csk->l2t->idx) |
1108 TX_CHAN_V(csk->tx_chan) |
1109 SMAC_SEL_V(csk->smac_idx) |
1110 DSCP_V(csk->tos >> 2) |
1111 ULP_MODE_V(ULP_MODE_ISCSI) |
1112 RCV_BUFSIZ_V(win);
1113
1114 opt2 = RX_CHANNEL_V(0) |
1115 RSS_QUEUE_VALID_F | RSS_QUEUE_V(csk->rss_qid);
1116
79e57cfe
VP		 1117 if (!is_t5(lldi->adapter_type))
1118 opt2 |= RX_FC_DISABLE_F;
1119
9730ffcb
VP		 1120 if (req->tcpopt.tstamp)
1121 opt2 |= TSTAMPS_EN_F;
1122 if (req->tcpopt.sack)
1123 opt2 |= SACK_EN_F;
1124 if (wscale)
1125 opt2 |= WND_SCALE_EN_F;
1126
1127 hlen = ntohl(req->hdr_len);
d88b504e
VP		 1128
1129 if (is_t5(lldi->adapter_type))
1130 tcph = (struct tcphdr *)((u8 *)(req + 1) +
1131 ETH_HDR_LEN_G(hlen) + IP_HDR_LEN_G(hlen));
1132 else
1133 tcph = (struct tcphdr *)((u8 *)(req + 1) +
1134 T6_ETH_HDR_LEN_G(hlen) + T6_IP_HDR_LEN_G(hlen));
9730ffcb
VP		 1135
1136 if (tcph->ece && tcph->cwr)
1137 opt2 |= CCTRL_ECN_V(1);
1138
1139 opt2 |= RX_COALESCE_V(3);
1140 opt2 |= CONG_CNTRL_V(CONG_ALG_NEWRENO);
1141
1142 opt2 |= T5_ISS_F;
1143 rpl5->iss = cpu_to_be32((prandom_u32() & ~7UL) - 1);
1144
1145 opt2 |= T5_OPT_2_VALID_F;
1146
1147 rpl5->opt0 = cpu_to_be64(opt0);
1148 rpl5->opt2 = cpu_to_be32(opt2);
1149 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->ctrlq_idx);
1150 t4_set_arp_err_handler(skb, NULL, cxgbit_arp_failure_discard);
1151 cxgbit_l2t_send(csk->com.cdev, skb, csk->l2t);
1152}
1153
1154static void
1155cxgbit_pass_accept_req(struct cxgbit_device *cdev, struct sk_buff *skb)
1156{
1157 struct cxgbit_sock *csk = NULL;
1158 struct cxgbit_np *cnp;
1159 struct cpl_pass_accept_req *req = cplhdr(skb);
1160 unsigned int stid = PASS_OPEN_TID_G(ntohl(req->tos_stid));
1161 struct tid_info *t = cdev->lldi.tids;
1162 unsigned int tid = GET_TID(req);
1163 u16 peer_mss = ntohs(req->tcpopt.mss);
1164 unsigned short hdrs;
1165
1166 struct dst_entry *dst;
1167 __u8 local_ip[16], peer_ip[16];
1168 __be16 local_port, peer_port;
1169 int ret;
1170 int iptype;
1171
1172 pr_debug("%s: cdev = %p; stid = %u; tid = %u\n",
1173 __func__, cdev, stid, tid);
1174
1175 cnp = lookup_stid(t, stid);
1176 if (!cnp) {
1177 pr_err("%s connect request on invalid stid %d\n",
1178 __func__, stid);
1179 goto rel_skb;
1180 }
1181
1182 if (cnp->com.state != CSK_STATE_LISTEN) {
1183 pr_err("%s - listening parent not in CSK_STATE_LISTEN\n",
1184 __func__);
1185 goto reject;
1186 }
1187
1188 csk = lookup_tid(t, tid);
1189 if (csk) {
1190 pr_err("%s csk not null tid %u\n",
1191 __func__, tid);
1192 goto rel_skb;
1193 }
1194
85e42b04
VP		 1195 cxgb_get_4tuple(req, cdev->lldi.adapter_type, &iptype, local_ip,
1196 peer_ip, &local_port, &peer_port);
9730ffcb
VP		 1197
1198 /* Find output route */
1199 if (iptype == 4) {
1200 pr_debug("%s parent sock %p tid %u laddr %pI4 raddr %pI4 "
1201 "lport %d rport %d peer_mss %d\n"
1202 , __func__, cnp, tid,
1203 local_ip, peer_ip, ntohs(local_port),
1204 ntohs(peer_port), peer_mss);
804c2f3e
VP		 1205 dst = cxgb_find_route(&cdev->lldi, cxgbit_get_real_dev,
1206 *(__be32 *)local_ip,
1207 *(__be32 *)peer_ip,
1208 local_port, peer_port,
1209 PASS_OPEN_TOS_G(ntohl(req->tos_stid)));
9730ffcb
VP		 1210 } else {
1211 pr_debug("%s parent sock %p tid %u laddr %pI6 raddr %pI6 "
1212 "lport %d rport %d peer_mss %d\n"
1213 , __func__, cnp, tid,
1214 local_ip, peer_ip, ntohs(local_port),
1215 ntohs(peer_port), peer_mss);
95554761
VP		 1216 dst = cxgb_find_route6(&cdev->lldi, cxgbit_get_real_dev,
1217 local_ip, peer_ip,
1218 local_port, peer_port,
1219 PASS_OPEN_TOS_G(ntohl(req->tos_stid)),
1220 ((struct sockaddr_in6 *)
1221 &cnp->com.local_addr)->sin6_scope_id);
9730ffcb
VP		 1222 }
1223 if (!dst) {
1224 pr_err("%s - failed to find dst entry!\n",
1225 __func__);
1226 goto reject;
1227 }
1228
1229 csk = kzalloc(sizeof(*csk), GFP_ATOMIC);
1230 if (!csk) {
1231 dst_release(dst);
1232 goto rel_skb;
1233 }
1234
1235 ret = cxgbit_offload_init(csk, iptype, peer_ip, ntohs(local_port),
1236 dst, cdev);
1237 if (ret) {
1238 pr_err("%s - failed to allocate l2t entry!\n",
1239 __func__);
1240 dst_release(dst);
1241 kfree(csk);
1242 goto reject;
1243 }
1244
1245 kref_init(&csk->kref);
1246 init_completion(&csk->com.wr_wait.completion);
1247
1248 INIT_LIST_HEAD(&csk->accept_node);
1249
1250 hdrs = (iptype == 4 ? sizeof(struct iphdr) : sizeof(struct ipv6hdr)) +
1251 sizeof(struct tcphdr) + (req->tcpopt.tstamp ? 12 : 0);
1252 if (peer_mss && csk->mtu > (peer_mss + hdrs))
1253 csk->mtu = peer_mss + hdrs;
1254
1255 csk->com.state = CSK_STATE_CONNECTING;
1256 csk->com.cdev = cdev;
1257 csk->cnp = cnp;
1258 csk->tos = PASS_OPEN_TOS_G(ntohl(req->tos_stid));
1259 csk->dst = dst;
1260 csk->tid = tid;
1261 csk->wr_cred = cdev->lldi.wr_cred -
1262 DIV_ROUND_UP(sizeof(struct cpl_abort_req), 16);
1263 csk->wr_max_cred = csk->wr_cred;
1264 csk->wr_una_cred = 0;
1265
1266 if (iptype == 4) {
1267 struct sockaddr_in *sin = (struct sockaddr_in *)
1268 &csk->com.local_addr;
1269 sin->sin_family = AF_INET;
1270 sin->sin_port = local_port;
1271 sin->sin_addr.s_addr = *(__be32 *)local_ip;
1272
1273 sin = (struct sockaddr_in *)&csk->com.remote_addr;
1274 sin->sin_family = AF_INET;
1275 sin->sin_port = peer_port;
1276 sin->sin_addr.s_addr = *(__be32 *)peer_ip;
1277 } else {
1278 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)
1279 &csk->com.local_addr;
1280
1281 sin6->sin6_family = PF_INET6;
1282 sin6->sin6_port = local_port;
1283 memcpy(sin6->sin6_addr.s6_addr, local_ip, 16);
1284 cxgb4_clip_get(cdev->lldi.ports[0],
1285 (const u32 *)&sin6->sin6_addr.s6_addr,
1286 1);
1287
1288 sin6 = (struct sockaddr_in6 *)&csk->com.remote_addr;
1289 sin6->sin6_family = PF_INET6;
1290 sin6->sin6_port = peer_port;
1291 memcpy(sin6->sin6_addr.s6_addr, peer_ip, 16);
1292 }
1293
1294 skb_queue_head_init(&csk->rxq);
1295 skb_queue_head_init(&csk->txq);
1296 skb_queue_head_init(&csk->ppodq);
1297 skb_queue_head_init(&csk->backlogq);
1298 skb_queue_head_init(&csk->skbq);
1299 cxgbit_sock_reset_wr_list(csk);
1300 spin_lock_init(&csk->lock);
1301 init_waitqueue_head(&csk->waitq);
1302 init_waitqueue_head(&csk->ack_waitq);
1303 csk->lock_owner = false;
1304
1305 if (cxgbit_alloc_csk_skb(csk)) {
1306 dst_release(dst);
1307 kfree(csk);
1308 goto rel_skb;
1309 }
1310
1311 cxgbit_get_cdev(cdev);
1312
1313 spin_lock(&cdev->cskq.lock);
1314 list_add_tail(&csk->list, &cdev->cskq.list);
1315 spin_unlock(&cdev->cskq.lock);
1dec4cec 1316 cxgb4_insert_tid(t, csk, tid, csk->com.local_addr.ss_family);
9730ffcb
VP		 1317 cxgbit_pass_accept_rpl(csk, req);
1318 goto rel_skb;
1319
1320reject:
1321 cxgbit_release_tid(cdev, tid);
1322rel_skb:
1323 __kfree_skb(skb);
1324}
1325
1326static u32
1327cxgbit_tx_flowc_wr_credits(struct cxgbit_sock *csk, u32 *nparamsp,
1328 u32 *flowclenp)
1329{
1330 u32 nparams, flowclen16, flowclen;
1331
1332 nparams = FLOWC_WR_NPARAMS_MIN;
1333
1334 if (csk->snd_wscale)
1335 nparams++;
1336
1337#ifdef CONFIG_CHELSIO_T4_DCB
1338 nparams++;
1339#endif
1340 flowclen = offsetof(struct fw_flowc_wr, mnemval[nparams]);
1341 flowclen16 = DIV_ROUND_UP(flowclen, 16);
1342 flowclen = flowclen16 * 16;
1343 /*
1344 * Return the number of 16-byte credits used by the flowc request.
1345 * Pass back the nparams and actual flowc length if requested.
1346 */
1347 if (nparamsp)
1348 *nparamsp = nparams;
1349 if (flowclenp)
1350 *flowclenp = flowclen;
1351 return flowclen16;
1352}
1353
1354u32 cxgbit_send_tx_flowc_wr(struct cxgbit_sock *csk)
1355{
1356 struct cxgbit_device *cdev = csk->com.cdev;
1357 struct fw_flowc_wr *flowc;
1358 u32 nparams, flowclen16, flowclen;
1359 struct sk_buff *skb;
1360 u8 index;
1361
1362#ifdef CONFIG_CHELSIO_T4_DCB
1363 u16 vlan = ((struct l2t_entry *)csk->l2t)->vlan;
1364#endif
1365
1366 flowclen16 = cxgbit_tx_flowc_wr_credits(csk, &nparams, &flowclen);
1367
1368 skb = __skb_dequeue(&csk->skbq);
de77b966 1369 flowc = __skb_put_zero(skb, flowclen);
9730ffcb
VP		 1370
1371 flowc->op_to_nparams = cpu_to_be32(FW_WR_OP_V(FW_FLOWC_WR) |
1372 FW_FLOWC_WR_NPARAMS_V(nparams));
1373 flowc->flowid_len16 = cpu_to_be32(FW_WR_LEN16_V(flowclen16) |
1374 FW_WR_FLOWID_V(csk->tid));
1375 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
1376 flowc->mnemval[0].val = cpu_to_be32(FW_PFVF_CMD_PFN_V
1377 (csk->com.cdev->lldi.pf));
1378 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
1379 flowc->mnemval[1].val = cpu_to_be32(csk->tx_chan);
1380 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
1381 flowc->mnemval[2].val = cpu_to_be32(csk->tx_chan);
1382 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
1383 flowc->mnemval[3].val = cpu_to_be32(csk->rss_qid);
1384 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
1385 flowc->mnemval[4].val = cpu_to_be32(csk->snd_nxt);
1386 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
1387 flowc->mnemval[5].val = cpu_to_be32(csk->rcv_nxt);
1388 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
1389 flowc->mnemval[6].val = cpu_to_be32(csk->snd_win);
1390 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
1391 flowc->mnemval[7].val = cpu_to_be32(csk->emss);
1392
1393 flowc->mnemval[8].mnemonic = FW_FLOWC_MNEM_TXDATAPLEN_MAX;
1394 if (test_bit(CDEV_ISO_ENABLE, &cdev->flags))
1395 flowc->mnemval[8].val = cpu_to_be32(CXGBIT_MAX_ISO_PAYLOAD);
1396 else
1397 flowc->mnemval[8].val = cpu_to_be32(16384);
1398
1399 index = 9;
1400
1401 if (csk->snd_wscale) {
1402 flowc->mnemval[index].mnemonic = FW_FLOWC_MNEM_RCV_SCALE;
1403 flowc->mnemval[index].val = cpu_to_be32(csk->snd_wscale);
1404 index++;
1405 }
1406
1407#ifdef CONFIG_CHELSIO_T4_DCB
1408 flowc->mnemval[index].mnemonic = FW_FLOWC_MNEM_DCBPRIO;
1409 if (vlan == VLAN_NONE) {
1410 pr_warn("csk %u without VLAN Tag on DCB Link\n", csk->tid);
1411 flowc->mnemval[index].val = cpu_to_be32(0);
1412 } else
1413 flowc->mnemval[index].val = cpu_to_be32(
1414 (vlan & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT);
1415#endif
1416
1417 pr_debug("%s: csk %p; tx_chan = %u; rss_qid = %u; snd_seq = %u;"
1418 " rcv_seq = %u; snd_win = %u; emss = %u\n",
1419 __func__, csk, csk->tx_chan, csk->rss_qid, csk->snd_nxt,
1420 csk->rcv_nxt, csk->snd_win, csk->emss);
1421 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->txq_idx);
1422 cxgbit_ofld_send(csk->com.cdev, skb);
1423 return flowclen16;
1424}
1425
1426int cxgbit_setup_conn_digest(struct cxgbit_sock *csk)
1427{
1428 struct sk_buff *skb;
1429 struct cpl_set_tcb_field *req;
1430 u8 hcrc = csk->submode & CXGBIT_SUBMODE_HCRC;
1431 u8 dcrc = csk->submode & CXGBIT_SUBMODE_DCRC;
1432 unsigned int len = roundup(sizeof(*req), 16);
1433 int ret;
1434
1435 skb = alloc_skb(len, GFP_KERNEL);
1436 if (!skb)
1437 return -ENOMEM;
1438
1439 /* set up ulp submode */
de77b966 1440 req = __skb_put_zero(skb, len);
9730ffcb
VP		 1441
1442 INIT_TP_WR(req, csk->tid);
1443 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid));
1444 req->reply_ctrl = htons(NO_REPLY_V(0) | QUEUENO_V(csk->rss_qid));
1445 req->word_cookie = htons(0);
1446 req->mask = cpu_to_be64(0x3 << 4);
1447 req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) |
1448 (dcrc ? ULP_CRC_DATA : 0)) << 4);
1449 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->ctrlq_idx);
1450
1451 cxgbit_get_csk(csk);
1452 cxgbit_init_wr_wait(&csk->com.wr_wait);
1453
1454 cxgbit_ofld_send(csk->com.cdev, skb);
1455
1456 ret = cxgbit_wait_for_reply(csk->com.cdev,
1457 &csk->com.wr_wait,
1458 csk->tid, 5, __func__);
1459 if (ret)
1460 return -1;
1461
1462 return 0;
1463}
1464
1465int cxgbit_setup_conn_pgidx(struct cxgbit_sock *csk, u32 pg_idx)
1466{
1467 struct sk_buff *skb;
1468 struct cpl_set_tcb_field *req;
1469 unsigned int len = roundup(sizeof(*req), 16);
1470 int ret;
1471
1472 skb = alloc_skb(len, GFP_KERNEL);
1473 if (!skb)
1474 return -ENOMEM;
1475
de77b966 1476 req = __skb_put_zero(skb, len);
9730ffcb
VP		 1477
1478 INIT_TP_WR(req, csk->tid);
1479 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid));
1480 req->reply_ctrl = htons(NO_REPLY_V(0) | QUEUENO_V(csk->rss_qid));
1481 req->word_cookie = htons(0);
1482 req->mask = cpu_to_be64(0x3 << 8);
1483 req->val = cpu_to_be64(pg_idx << 8);
1484 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->ctrlq_idx);
1485
1486 cxgbit_get_csk(csk);
1487 cxgbit_init_wr_wait(&csk->com.wr_wait);
1488
1489 cxgbit_ofld_send(csk->com.cdev, skb);
1490
1491 ret = cxgbit_wait_for_reply(csk->com.cdev,
1492 &csk->com.wr_wait,
1493 csk->tid, 5, __func__);
1494 if (ret)
1495 return -1;
1496
1497 return 0;
1498}
1499
1500static void
1501cxgbit_pass_open_rpl(struct cxgbit_device *cdev, struct sk_buff *skb)
1502{
1503 struct cpl_pass_open_rpl *rpl = cplhdr(skb);
1504 struct tid_info *t = cdev->lldi.tids;
1505 unsigned int stid = GET_TID(rpl);
1506 struct cxgbit_np *cnp = lookup_stid(t, stid);
1507
1508 pr_debug("%s: cnp = %p; stid = %u; status = %d\n",
1509 __func__, cnp, stid, rpl->status);
1510
1511 if (!cnp) {
1512 pr_info("%s stid %d lookup failure\n", __func__, stid);
66b59f9b 1513 goto rel_skb;
9730ffcb
VP		 1514 }
1515
1516 cxgbit_wake_up(&cnp->com.wr_wait, __func__, rpl->status);
1517 cxgbit_put_cnp(cnp);
66b59f9b
VP		 1518rel_skb:
1519 __kfree_skb(skb);
9730ffcb
VP		 1520}
1521
1522static void
1523cxgbit_close_listsrv_rpl(struct cxgbit_device *cdev, struct sk_buff *skb)
1524{
1525 struct cpl_close_listsvr_rpl *rpl = cplhdr(skb);
1526 struct tid_info *t = cdev->lldi.tids;
1527 unsigned int stid = GET_TID(rpl);
1528 struct cxgbit_np *cnp = lookup_stid(t, stid);
1529
1530 pr_debug("%s: cnp = %p; stid = %u; status = %d\n",
1531 __func__, cnp, stid, rpl->status);
1532
1533 if (!cnp) {
1534 pr_info("%s stid %d lookup failure\n", __func__, stid);
66b59f9b 1535 goto rel_skb;
9730ffcb
VP		 1536 }
1537
1538 cxgbit_wake_up(&cnp->com.wr_wait, __func__, rpl->status);
1539 cxgbit_put_cnp(cnp);
66b59f9b
VP		 1540rel_skb:
1541 __kfree_skb(skb);
9730ffcb
VP		 1542}
1543
1544static void
1545cxgbit_pass_establish(struct cxgbit_device *cdev, struct sk_buff *skb)
1546{
1547 struct cpl_pass_establish *req = cplhdr(skb);
1548 struct tid_info *t = cdev->lldi.tids;
1549 unsigned int tid = GET_TID(req);
1550 struct cxgbit_sock *csk;
1551 struct cxgbit_np *cnp;
1552 u16 tcp_opt = be16_to_cpu(req->tcp_opt);
1553 u32 snd_isn = be32_to_cpu(req->snd_isn);
1554 u32 rcv_isn = be32_to_cpu(req->rcv_isn);
1555
1556 csk = lookup_tid(t, tid);
1557 if (unlikely(!csk)) {
1558 pr_err("can't find connection for tid %u.\n", tid);
1559 goto rel_skb;
1560 }
1561 cnp = csk->cnp;
1562
1563 pr_debug("%s: csk %p; tid %u; cnp %p\n",
1564 __func__, csk, tid, cnp);
1565
1566 csk->write_seq = snd_isn;
1567 csk->snd_una = snd_isn;
1568 csk->snd_nxt = snd_isn;
1569
1570 csk->rcv_nxt = rcv_isn;
1571
1572 if (csk->rcv_win > (RCV_BUFSIZ_M << 10))
1573 csk->rx_credits = (csk->rcv_win - (RCV_BUFSIZ_M << 10));
1574
1575 csk->snd_wscale = TCPOPT_SND_WSCALE_G(tcp_opt);
1576 cxgbit_set_emss(csk, tcp_opt);
1577 dst_confirm(csk->dst);
1578 csk->com.state = CSK_STATE_ESTABLISHED;
1579 spin_lock_bh(&cnp->np_accept_lock);
1580 list_add_tail(&csk->accept_node, &cnp->np_accept_list);
1581 spin_unlock_bh(&cnp->np_accept_lock);
1582 complete(&cnp->accept_comp);
1583rel_skb:
1584 __kfree_skb(skb);
1585}
1586
1587static void cxgbit_queue_rx_skb(struct cxgbit_sock *csk, struct sk_buff *skb)
1588{
1589 cxgbit_skcb_flags(skb) = 0;
1590 spin_lock_bh(&csk->rxq.lock);
1591 __skb_queue_tail(&csk->rxq, skb);
1592 spin_unlock_bh(&csk->rxq.lock);
1593 wake_up(&csk->waitq);
1594}
1595
1596static void cxgbit_peer_close(struct cxgbit_sock *csk, struct sk_buff *skb)
1597{
1598 pr_debug("%s: csk %p; tid %u; state %d\n",
1599 __func__, csk, csk->tid, csk->com.state);
1600
1601 switch (csk->com.state) {
1602 case CSK_STATE_ESTABLISHED:
1603 csk->com.state = CSK_STATE_CLOSING;
1604 cxgbit_queue_rx_skb(csk, skb);
1605 return;
1606 case CSK_STATE_CLOSING:
1607 /* simultaneous close */
1608 csk->com.state = CSK_STATE_MORIBUND;
1609 break;
1610 case CSK_STATE_MORIBUND:
1611 csk->com.state = CSK_STATE_DEAD;
1612 cxgbit_put_csk(csk);
1613 break;
1614 case CSK_STATE_ABORTING:
1615 break;
1616 default:
1617 pr_info("%s: cpl_peer_close in bad state %d\n",
1618 __func__, csk->com.state);
1619 }
1620
1621 __kfree_skb(skb);
1622}
1623
1624static void cxgbit_close_con_rpl(struct cxgbit_sock *csk, struct sk_buff *skb)
1625{
1626 pr_debug("%s: csk %p; tid %u; state %d\n",
1627 __func__, csk, csk->tid, csk->com.state);
1628
1629 switch (csk->com.state) {
1630 case CSK_STATE_CLOSING:
1631 csk->com.state = CSK_STATE_MORIBUND;
1632 break;
1633 case CSK_STATE_MORIBUND:
1634 csk->com.state = CSK_STATE_DEAD;
1635 cxgbit_put_csk(csk);
1636 break;
1637 case CSK_STATE_ABORTING:
1638 case CSK_STATE_DEAD:
1639 break;
1640 default:
1641 pr_info("%s: cpl_close_con_rpl in bad state %d\n",
1642 __func__, csk->com.state);
1643 }
1644
1645 __kfree_skb(skb);
1646}
1647
1648static void cxgbit_abort_req_rss(struct cxgbit_sock *csk, struct sk_buff *skb)
1649{
1650 struct cpl_abort_req_rss *hdr = cplhdr(skb);
1651 unsigned int tid = GET_TID(hdr);
9730ffcb
VP		 1652 struct sk_buff *rpl_skb;
1653 bool release = false;
1654 bool wakeup_thread = false;
052f4731 1655 u32 len = roundup(sizeof(struct cpl_abort_rpl), 16);
9730ffcb
VP		 1656
1657 pr_debug("%s: csk %p; tid %u; state %d\n",
1658 __func__, csk, tid, csk->com.state);
1659
b65eef0a 1660 if (cxgb_is_neg_adv(hdr->status)) {
9730ffcb
VP		 1661 pr_err("%s: got neg advise %d on tid %u\n",
1662 __func__, hdr->status, tid);
1663 goto rel_skb;
1664 }
1665
1666 switch (csk->com.state) {
1667 case CSK_STATE_CONNECTING:
1668 case CSK_STATE_MORIBUND:
1669 csk->com.state = CSK_STATE_DEAD;
1670 release = true;
1671 break;
1672 case CSK_STATE_ESTABLISHED:
1673 csk->com.state = CSK_STATE_DEAD;
1674 wakeup_thread = true;
1675 break;
1676 case CSK_STATE_CLOSING:
1677 csk->com.state = CSK_STATE_DEAD;
1678 if (!csk->conn)
1679 release = true;
1680 break;
1681 case CSK_STATE_ABORTING:
1682 break;
1683 default:
1684 pr_info("%s: cpl_abort_req_rss in bad state %d\n",
1685 __func__, csk->com.state);
1686 csk->com.state = CSK_STATE_DEAD;
1687 }
1688
1689 __skb_queue_purge(&csk->txq);
1690
1691 if (!test_and_set_bit(CSK_TX_DATA_SENT, &csk->com.flags))
1692 cxgbit_send_tx_flowc_wr(csk);
1693
1694 rpl_skb = __skb_dequeue(&csk->skbq);
9730ffcb 1695
052f4731 1696 cxgb_mk_abort_rpl(rpl_skb, len, csk->tid, csk->txq_idx);
9730ffcb
VP		 1697 cxgbit_ofld_send(csk->com.cdev, rpl_skb);
1698
1699 if (wakeup_thread) {
1700 cxgbit_queue_rx_skb(csk, skb);
1701 return;
1702 }
1703
1704 if (release)
1705 cxgbit_put_csk(csk);
1706rel_skb:
1707 __kfree_skb(skb);
1708}
1709
1710static void cxgbit_abort_rpl_rss(struct cxgbit_sock *csk, struct sk_buff *skb)
1711{
1712 pr_debug("%s: csk %p; tid %u; state %d\n",
1713 __func__, csk, csk->tid, csk->com.state);
1714
1715 switch (csk->com.state) {
1716 case CSK_STATE_ABORTING:
1717 csk->com.state = CSK_STATE_DEAD;
1718 cxgbit_put_csk(csk);
1719 break;
1720 default:
1721 pr_info("%s: cpl_abort_rpl_rss in state %d\n",
1722 __func__, csk->com.state);
1723 }
1724
1725 __kfree_skb(skb);
1726}
1727
1728static bool cxgbit_credit_err(const struct cxgbit_sock *csk)
1729{
1730 const struct sk_buff *skb = csk->wr_pending_head;
1731 u32 credit = 0;
1732
1733 if (unlikely(csk->wr_cred > csk->wr_max_cred)) {
1734 pr_err("csk 0x%p, tid %u, credit %u > %u\n",
1735 csk, csk->tid, csk->wr_cred, csk->wr_max_cred);
1736 return true;
1737 }
1738
1739 while (skb) {
5cadafb2 1740 credit += (__force u32)skb->csum;
9730ffcb
VP		 1741 skb = cxgbit_skcb_tx_wr_next(skb);
1742 }
1743
1744 if (unlikely((csk->wr_cred + credit) != csk->wr_max_cred)) {
1745 pr_err("csk 0x%p, tid %u, credit %u + %u != %u.\n",
1746 csk, csk->tid, csk->wr_cred,
1747 credit, csk->wr_max_cred);
1748
1749 return true;
1750 }
1751
1752 return false;
1753}
1754
1755static void cxgbit_fw4_ack(struct cxgbit_sock *csk, struct sk_buff *skb)
1756{
1757 struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)cplhdr(skb);
1758 u32 credits = rpl->credits;
1759 u32 snd_una = ntohl(rpl->snd_una);
1760
1761 csk->wr_cred += credits;
1762 if (csk->wr_una_cred > (csk->wr_max_cred - csk->wr_cred))
1763 csk->wr_una_cred = csk->wr_max_cred - csk->wr_cred;
1764
1765 while (credits) {
1766 struct sk_buff *p = cxgbit_sock_peek_wr(csk);
5cadafb2 1767 const u32 csum = (__force u32)p->csum;
9730ffcb
VP		 1768
1769 if (unlikely(!p)) {
1770 pr_err("csk 0x%p,%u, cr %u,%u+%u, empty.\n",
1771 csk, csk->tid, credits,
1772 csk->wr_cred, csk->wr_una_cred);
1773 break;
1774 }
1775
5cadafb2 1776 if (unlikely(credits < csum)) {
9730ffcb
VP		 1777 pr_warn("csk 0x%p,%u, cr %u,%u+%u, < %u.\n",
1778 csk, csk->tid,
1779 credits, csk->wr_cred, csk->wr_una_cred,
5cadafb2
BVA		 1780 csum);
1781 p->csum = (__force __wsum)(csum - credits);
9730ffcb
VP		 1782 break;
1783 }
1784
1785 cxgbit_sock_dequeue_wr(csk);
5cadafb2 1786 credits -= csum;
9730ffcb
VP		 1787 kfree_skb(p);
1788 }
1789
1790 if (unlikely(cxgbit_credit_err(csk))) {
1791 cxgbit_queue_rx_skb(csk, skb);
1792 return;
1793 }
1794
1795 if (rpl->seq_vld & CPL_FW4_ACK_FLAGS_SEQVAL) {
1796 if (unlikely(before(snd_una, csk->snd_una))) {
1797 pr_warn("csk 0x%p,%u, snd_una %u/%u.",
1798 csk, csk->tid, snd_una,
1799 csk->snd_una);
1800 goto rel_skb;
1801 }
1802
1803 if (csk->snd_una != snd_una) {
1804 csk->snd_una = snd_una;
1805 dst_confirm(csk->dst);
1806 wake_up(&csk->ack_waitq);
1807 }
1808 }
1809
1810 if (skb_queue_len(&csk->txq))
1811 cxgbit_push_tx_frames(csk);
1812
1813rel_skb:
1814 __kfree_skb(skb);
1815}
1816
1817static void cxgbit_set_tcb_rpl(struct cxgbit_device *cdev, struct sk_buff *skb)
1818{
1819 struct cxgbit_sock *csk;
1820 struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data;
1821 unsigned int tid = GET_TID(rpl);
1822 struct cxgb4_lld_info *lldi = &cdev->lldi;
1823 struct tid_info *t = lldi->tids;
1824
1825 csk = lookup_tid(t, tid);
66b59f9b 1826 if (unlikely(!csk)) {
9730ffcb 1827 pr_err("can't find connection for tid %u.\n", tid);
66b59f9b
VP		 1828 goto rel_skb;
1829 } else {
9730ffcb 1830 cxgbit_wake_up(&csk->com.wr_wait, __func__, rpl->status);
66b59f9b 1831 }
9730ffcb
VP		 1832
1833 cxgbit_put_csk(csk);
66b59f9b
VP		 1834rel_skb:
1835 __kfree_skb(skb);
9730ffcb
VP		 1836}
1837
1838static void cxgbit_rx_data(struct cxgbit_device *cdev, struct sk_buff *skb)
1839{
1840 struct cxgbit_sock *csk;
1841 struct cpl_rx_data *cpl = cplhdr(skb);
1842 unsigned int tid = GET_TID(cpl);
1843 struct cxgb4_lld_info *lldi = &cdev->lldi;
1844 struct tid_info *t = lldi->tids;
1845
1846 csk = lookup_tid(t, tid);
1847 if (unlikely(!csk)) {
1848 pr_err("can't find conn. for tid %u.\n", tid);
1849 goto rel_skb;
1850 }
1851
1852 cxgbit_queue_rx_skb(csk, skb);
1853 return;
1854rel_skb:
1855 __kfree_skb(skb);
1856}
1857
1858static void
1859__cxgbit_process_rx_cpl(struct cxgbit_sock *csk, struct sk_buff *skb)
1860{
1861 spin_lock(&csk->lock);
1862 if (csk->lock_owner) {
1863 __skb_queue_tail(&csk->backlogq, skb);
1864 spin_unlock(&csk->lock);
1865 return;
1866 }
1867
1868 cxgbit_skcb_rx_backlog_fn(skb)(csk, skb);
1869 spin_unlock(&csk->lock);
1870}
1871
1872static void cxgbit_process_rx_cpl(struct cxgbit_sock *csk, struct sk_buff *skb)
1873{
1874 cxgbit_get_csk(csk);
1875 __cxgbit_process_rx_cpl(csk, skb);
1876 cxgbit_put_csk(csk);
1877}
1878
1879static void cxgbit_rx_cpl(struct cxgbit_device *cdev, struct sk_buff *skb)
1880{
1881 struct cxgbit_sock *csk;
1882 struct cpl_tx_data *cpl = cplhdr(skb);
1883 struct cxgb4_lld_info *lldi = &cdev->lldi;
1884 struct tid_info *t = lldi->tids;
1885 unsigned int tid = GET_TID(cpl);
1886 u8 opcode = cxgbit_skcb_rx_opcode(skb);
1887 bool ref = true;
1888
1889 switch (opcode) {
1890 case CPL_FW4_ACK:
1891 cxgbit_skcb_rx_backlog_fn(skb) = cxgbit_fw4_ack;
1892 ref = false;
1893 break;
1894 case CPL_PEER_CLOSE:
1895 cxgbit_skcb_rx_backlog_fn(skb) = cxgbit_peer_close;
1896 break;
1897 case CPL_CLOSE_CON_RPL:
1898 cxgbit_skcb_rx_backlog_fn(skb) = cxgbit_close_con_rpl;
1899 break;
1900 case CPL_ABORT_REQ_RSS:
1901 cxgbit_skcb_rx_backlog_fn(skb) = cxgbit_abort_req_rss;
1902 break;
1903 case CPL_ABORT_RPL_RSS:
1904 cxgbit_skcb_rx_backlog_fn(skb) = cxgbit_abort_rpl_rss;
1905 break;
1906 default:
1907 goto rel_skb;
1908 }
1909
1910 csk = lookup_tid(t, tid);
1911 if (unlikely(!csk)) {
1912 pr_err("can't find conn. for tid %u.\n", tid);
1913 goto rel_skb;
1914 }
1915
1916 if (ref)
1917 cxgbit_process_rx_cpl(csk, skb);
1918 else
1919 __cxgbit_process_rx_cpl(csk, skb);
1920
1921 return;
1922rel_skb:
1923 __kfree_skb(skb);
1924}
1925
1926cxgbit_cplhandler_func cxgbit_cplhandlers[NUM_CPL_CMDS] = {
1927 [CPL_PASS_OPEN_RPL] = cxgbit_pass_open_rpl,
1928 [CPL_CLOSE_LISTSRV_RPL] = cxgbit_close_listsrv_rpl,
1929 [CPL_PASS_ACCEPT_REQ] = cxgbit_pass_accept_req,
1930 [CPL_PASS_ESTABLISH] = cxgbit_pass_establish,
1931 [CPL_SET_TCB_RPL] = cxgbit_set_tcb_rpl,
1932 [CPL_RX_DATA] = cxgbit_rx_data,
1933 [CPL_FW4_ACK] = cxgbit_rx_cpl,
1934 [CPL_PEER_CLOSE] = cxgbit_rx_cpl,
1935 [CPL_CLOSE_CON_RPL] = cxgbit_rx_cpl,
1936 [CPL_ABORT_REQ_RSS] = cxgbit_rx_cpl,
1937 [CPL_ABORT_RPL_RSS] = cxgbit_rx_cpl,
1938};
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