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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
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
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
495
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
601static void __cxgbit_free_conn(struct cxgbit_sock *csk);
602
603void cxgbit_free_np(struct iscsi_np *np)
604{
605 struct cxgbit_np *cnp = np->np_context;
606 struct cxgbit_sock *csk, *tmp;
607
608 cnp->com.state = CSK_STATE_DEAD;
609 if (cnp->com.cdev)
610 cxgbit_free_cdev_np(cnp);
611 else
612 cxgbit_free_all_np(cnp);
613
614 spin_lock_bh(&cnp->np_accept_lock);
615 list_for_each_entry_safe(csk, tmp, &cnp->np_accept_list, accept_node) {
616 list_del_init(&csk->accept_node);
617 __cxgbit_free_conn(csk);
618 }
619 spin_unlock_bh(&cnp->np_accept_lock);
620
621 np->np_context = NULL;
622 cxgbit_put_cnp(cnp);
623}
624
625static void cxgbit_send_halfclose(struct cxgbit_sock *csk)
626{
627 struct sk_buff *skb;
628 u32 len = roundup(sizeof(struct cpl_close_con_req), 16);
629
630 skb = alloc_skb(len, GFP_ATOMIC);
631 if (!skb)
632 return;
633
634 cxgb_mk_close_con_req(skb, len, csk->tid, csk->txq_idx,
635 NULL, NULL);
636
637 cxgbit_skcb_flags(skb) |= SKCBF_TX_FLAG_COMPL;
638 __skb_queue_tail(&csk->txq, skb);
639 cxgbit_push_tx_frames(csk);
640}
641
642static void cxgbit_arp_failure_discard(void *handle, struct sk_buff *skb)
643{
644 struct cxgbit_sock *csk = handle;
645
646 pr_debug("%s cxgbit_device %p\n", __func__, handle);
647 kfree_skb(skb);
648 cxgbit_put_csk(csk);
649}
650
651static void cxgbit_abort_arp_failure(void *handle, struct sk_buff *skb)
652{
653 struct cxgbit_device *cdev = handle;
654 struct cpl_abort_req *req = cplhdr(skb);
655
656 pr_debug("%s cdev %p\n", __func__, cdev);
657 req->cmd = CPL_ABORT_NO_RST;
658 cxgbit_ofld_send(cdev, skb);
659}
660
661static int cxgbit_send_abort_req(struct cxgbit_sock *csk)
662{
663 struct sk_buff *skb;
664 u32 len = roundup(sizeof(struct cpl_abort_req), 16);
665
666 pr_debug("%s: csk %p tid %u; state %d\n",
667 __func__, csk, csk->tid, csk->com.state);
668
669 __skb_queue_purge(&csk->txq);
670
671 if (!test_and_set_bit(CSK_TX_DATA_SENT, &csk->com.flags))
672 cxgbit_send_tx_flowc_wr(csk);
673
674 skb = __skb_dequeue(&csk->skbq);
675 cxgb_mk_abort_req(skb, len, csk->tid, csk->txq_idx,
676 csk->com.cdev, cxgbit_abort_arp_failure);
677
678 return cxgbit_l2t_send(csk->com.cdev, skb, csk->l2t);
679}
680
681static void
682__cxgbit_abort_conn(struct cxgbit_sock *csk, struct sk_buff *skb)
683{
684 __kfree_skb(skb);
685
686 if (csk->com.state != CSK_STATE_ESTABLISHED)
687 goto no_abort;
688
689 set_bit(CSK_ABORT_RPL_WAIT, &csk->com.flags);
690 csk->com.state = CSK_STATE_ABORTING;
691
692 cxgbit_send_abort_req(csk);
693
694 return;
695
696no_abort:
697 cxgbit_wake_up(&csk->com.wr_wait, __func__, CPL_ERR_NONE);
698 cxgbit_put_csk(csk);
699}
700
701void cxgbit_abort_conn(struct cxgbit_sock *csk)
702{
703 struct sk_buff *skb = alloc_skb(0, GFP_KERNEL | __GFP_NOFAIL);
704
705 cxgbit_get_csk(csk);
706 cxgbit_init_wr_wait(&csk->com.wr_wait);
707
708 spin_lock_bh(&csk->lock);
709 if (csk->lock_owner) {
710 cxgbit_skcb_rx_backlog_fn(skb) = __cxgbit_abort_conn;
711 __skb_queue_tail(&csk->backlogq, skb);
712 } else {
713 __cxgbit_abort_conn(csk, skb);
714 }
715 spin_unlock_bh(&csk->lock);
716
717 cxgbit_wait_for_reply(csk->com.cdev, &csk->com.wr_wait,
718 csk->tid, 600, __func__);
719}
720
721static void __cxgbit_free_conn(struct cxgbit_sock *csk)
722{
723 struct iscsi_conn *conn = csk->conn;
724 bool release = false;
725
726 pr_debug("%s: state %d\n",
727 __func__, csk->com.state);
728
729 spin_lock_bh(&csk->lock);
730 switch (csk->com.state) {
731 case CSK_STATE_ESTABLISHED:
732 if (conn && (conn->conn_state == TARG_CONN_STATE_IN_LOGOUT)) {
733 csk->com.state = CSK_STATE_CLOSING;
734 cxgbit_send_halfclose(csk);
735 } else {
736 csk->com.state = CSK_STATE_ABORTING;
737 cxgbit_send_abort_req(csk);
738 }
739 break;
740 case CSK_STATE_CLOSING:
741 csk->com.state = CSK_STATE_MORIBUND;
742 cxgbit_send_halfclose(csk);
743 break;
744 case CSK_STATE_DEAD:
745 release = true;
746 break;
747 default:
748 pr_err("%s: csk %p; state %d\n",
749 __func__, csk, csk->com.state);
750 }
751 spin_unlock_bh(&csk->lock);
752
753 if (release)
754 cxgbit_put_csk(csk);
755}
756
757void cxgbit_free_conn(struct iscsi_conn *conn)
758{
759 __cxgbit_free_conn(conn->context);
760}
761
762static void cxgbit_set_emss(struct cxgbit_sock *csk, u16 opt)
763{
764 csk->emss = csk->com.cdev->lldi.mtus[TCPOPT_MSS_G(opt)] -
765 ((csk->com.remote_addr.ss_family == AF_INET) ?
766 sizeof(struct iphdr) : sizeof(struct ipv6hdr)) -
767 sizeof(struct tcphdr);
768 csk->mss = csk->emss;
769 if (TCPOPT_TSTAMP_G(opt))
770 csk->emss -= round_up(TCPOLEN_TIMESTAMP, 4);
771 if (csk->emss < 128)
772 csk->emss = 128;
773 if (csk->emss & 7)
774 pr_info("Warning: misaligned mtu idx %u mss %u emss=%u\n",
775 TCPOPT_MSS_G(opt), csk->mss, csk->emss);
776 pr_debug("%s mss_idx %u mss %u emss=%u\n", __func__, TCPOPT_MSS_G(opt),
777 csk->mss, csk->emss);
778}
779
780static void cxgbit_free_skb(struct cxgbit_sock *csk)
781{
782 struct sk_buff *skb;
783
784 __skb_queue_purge(&csk->txq);
785 __skb_queue_purge(&csk->rxq);
786 __skb_queue_purge(&csk->backlogq);
787 __skb_queue_purge(&csk->ppodq);
788 __skb_queue_purge(&csk->skbq);
789
790 while ((skb = cxgbit_sock_dequeue_wr(csk)))
791 kfree_skb(skb);
792
793 __kfree_skb(csk->lro_hskb);
794}
795
796void _cxgbit_free_csk(struct kref *kref)
797{
798 struct cxgbit_sock *csk;
799 struct cxgbit_device *cdev;
800
801 csk = container_of(kref, struct cxgbit_sock, kref);
802
803 pr_debug("%s csk %p state %d\n", __func__, csk, csk->com.state);
804
805 if (csk->com.local_addr.ss_family == AF_INET6) {
806 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)
807 &csk->com.local_addr;
808 cxgb4_clip_release(csk->com.cdev->lldi.ports[0],
809 (const u32 *)
810 &sin6->sin6_addr.s6_addr, 1);
811 }
812
813 cxgb4_remove_tid(csk->com.cdev->lldi.tids, 0, csk->tid,
814 csk->com.local_addr.ss_family);
815 dst_release(csk->dst);
816 cxgb4_l2t_release(csk->l2t);
817
818 cdev = csk->com.cdev;
819 spin_lock_bh(&cdev->cskq.lock);
820 list_del(&csk->list);
821 spin_unlock_bh(&cdev->cskq.lock);
822
823 cxgbit_free_skb(csk);
824 cxgbit_put_cnp(csk->cnp);
825 cxgbit_put_cdev(cdev);
826
827 kfree(csk);
828}
829
830static void cxgbit_set_tcp_window(struct cxgbit_sock *csk, struct port_info *pi)
831{
832 unsigned int linkspeed;
833 u8 scale;
834
835 linkspeed = pi->link_cfg.speed;
836 scale = linkspeed / SPEED_10000;
837
838#define CXGBIT_10G_RCV_WIN (256 * 1024)
839 csk->rcv_win = CXGBIT_10G_RCV_WIN;
840 if (scale)
841 csk->rcv_win *= scale;
842
843#define CXGBIT_10G_SND_WIN (256 * 1024)
844 csk->snd_win = CXGBIT_10G_SND_WIN;
845 if (scale)
846 csk->snd_win *= scale;
847
848 pr_debug("%s snd_win %d rcv_win %d\n",
849 __func__, csk->snd_win, csk->rcv_win);
850}
851
852#ifdef CONFIG_CHELSIO_T4_DCB
853static u8 cxgbit_get_iscsi_dcb_state(struct net_device *ndev)
854{
855 return ndev->dcbnl_ops->getstate(ndev);
856}
857
858static int cxgbit_select_priority(int pri_mask)
859{
860 if (!pri_mask)
861 return 0;
862
863 return (ffs(pri_mask) - 1);
864}
865
866static u8 cxgbit_get_iscsi_dcb_priority(struct net_device *ndev, u16 local_port)
867{
868 int ret;
869 u8 caps;
870
871 struct dcb_app iscsi_dcb_app = {
872 .protocol = local_port
873 };
874
875 ret = (int)ndev->dcbnl_ops->getcap(ndev, DCB_CAP_ATTR_DCBX, &caps);
876
877 if (ret)
878 return 0;
879
880 if (caps & DCB_CAP_DCBX_VER_IEEE) {
881 iscsi_dcb_app.selector = IEEE_8021QAZ_APP_SEL_STREAM;
882 ret = dcb_ieee_getapp_mask(ndev, &iscsi_dcb_app);
883 if (!ret) {
884 iscsi_dcb_app.selector = IEEE_8021QAZ_APP_SEL_ANY;
885 ret = dcb_ieee_getapp_mask(ndev, &iscsi_dcb_app);
886 }
887 } else if (caps & DCB_CAP_DCBX_VER_CEE) {
888 iscsi_dcb_app.selector = DCB_APP_IDTYPE_PORTNUM;
889
890 ret = dcb_getapp(ndev, &iscsi_dcb_app);
891 }
892
893 pr_info("iSCSI priority is set to %u\n", cxgbit_select_priority(ret));
894
895 return cxgbit_select_priority(ret);
896}
897#endif
898
899static int
900cxgbit_offload_init(struct cxgbit_sock *csk, int iptype, __u8 *peer_ip,
901 u16 local_port, struct dst_entry *dst,
902 struct cxgbit_device *cdev)
903{
904 struct neighbour *n;
905 int ret, step;
906 struct net_device *ndev;
907 u16 rxq_idx, port_id;
908#ifdef CONFIG_CHELSIO_T4_DCB
909 u8 priority = 0;
910#endif
911
912 n = dst_neigh_lookup(dst, peer_ip);
913 if (!n)
914 return -ENODEV;
915
916 rcu_read_lock();
917 if (!(n->nud_state & NUD_VALID))
918 neigh_event_send(n, NULL);
919
920 ret = -ENOMEM;
921 if (n->dev->flags & IFF_LOOPBACK) {
922 if (iptype == 4)
923 ndev = cxgbit_ipv4_netdev(*(__be32 *)peer_ip);
924 else if (IS_ENABLED(CONFIG_IPV6))
925 ndev = cxgbit_ipv6_netdev((struct in6_addr *)peer_ip);
926 else
927 ndev = NULL;
928
929 if (!ndev) {
930 ret = -ENODEV;
931 goto out;
932 }
933
934 csk->l2t = cxgb4_l2t_get(cdev->lldi.l2t,
935 n, ndev, 0);
936 if (!csk->l2t)
937 goto out;
938 csk->mtu = ndev->mtu;
939 csk->tx_chan = cxgb4_port_chan(ndev);
940 csk->smac_idx =
941 ((struct port_info *)netdev_priv(ndev))->smt_idx;
942 step = cdev->lldi.ntxq /
943 cdev->lldi.nchan;
944 csk->txq_idx = cxgb4_port_idx(ndev) * step;
945 step = cdev->lldi.nrxq /
946 cdev->lldi.nchan;
947 csk->ctrlq_idx = cxgb4_port_idx(ndev);
948 csk->rss_qid = cdev->lldi.rxq_ids[
949 cxgb4_port_idx(ndev) * step];
950 csk->port_id = cxgb4_port_idx(ndev);
951 cxgbit_set_tcp_window(csk,
952 (struct port_info *)netdev_priv(ndev));
953 } else {
954 ndev = cxgbit_get_real_dev(n->dev);
955 if (!ndev) {
956 ret = -ENODEV;
957 goto out;
958 }
959
960#ifdef CONFIG_CHELSIO_T4_DCB
961 if (cxgbit_get_iscsi_dcb_state(ndev))
962 priority = cxgbit_get_iscsi_dcb_priority(ndev,
963 local_port);
964
965 csk->dcb_priority = priority;
966
967 csk->l2t = cxgb4_l2t_get(cdev->lldi.l2t, n, ndev, priority);
968#else
969 csk->l2t = cxgb4_l2t_get(cdev->lldi.l2t, n, ndev, 0);
970#endif
971 if (!csk->l2t)
972 goto out;
973 port_id = cxgb4_port_idx(ndev);
974 csk->mtu = dst_mtu(dst);
975 csk->tx_chan = cxgb4_port_chan(ndev);
976 csk->smac_idx =
977 ((struct port_info *)netdev_priv(ndev))->smt_idx;
978 step = cdev->lldi.ntxq /
979 cdev->lldi.nports;
980 csk->txq_idx = (port_id * step) +
981 (cdev->selectq[port_id][0]++ % step);
982 csk->ctrlq_idx = cxgb4_port_idx(ndev);
983 step = cdev->lldi.nrxq /
984 cdev->lldi.nports;
985 rxq_idx = (port_id * step) +
986 (cdev->selectq[port_id][1]++ % step);
987 csk->rss_qid = cdev->lldi.rxq_ids[rxq_idx];
988 csk->port_id = port_id;
989 cxgbit_set_tcp_window(csk,
990 (struct port_info *)netdev_priv(ndev));
991 }
992 ret = 0;
993out:
994 rcu_read_unlock();
995 neigh_release(n);
996 return ret;
997}
998
999int cxgbit_ofld_send(struct cxgbit_device *cdev, struct sk_buff *skb)
1000{
1001 int ret = 0;
1002
1003 if (!test_bit(CDEV_STATE_UP, &cdev->flags)) {
1004 kfree_skb(skb);
1005 pr_err("%s - device not up - dropping\n", __func__);
1006 return -EIO;
1007 }
1008
1009 ret = cxgb4_ofld_send(cdev->lldi.ports[0], skb);
1010 if (ret < 0)
1011 kfree_skb(skb);
1012 return ret < 0 ? ret : 0;
1013}
1014
1015static void cxgbit_release_tid(struct cxgbit_device *cdev, u32 tid)
1016{
1017 u32 len = roundup(sizeof(struct cpl_tid_release), 16);
1018 struct sk_buff *skb;
1019
1020 skb = alloc_skb(len, GFP_ATOMIC);
1021 if (!skb)
1022 return;
1023
1024 cxgb_mk_tid_release(skb, len, tid, 0);
1025 cxgbit_ofld_send(cdev, skb);
1026}
1027
1028int
1029cxgbit_l2t_send(struct cxgbit_device *cdev, struct sk_buff *skb,
1030 struct l2t_entry *l2e)
1031{
1032 int ret = 0;
1033
1034 if (!test_bit(CDEV_STATE_UP, &cdev->flags)) {
1035 kfree_skb(skb);
1036 pr_err("%s - device not up - dropping\n", __func__);
1037 return -EIO;
1038 }
1039
1040 ret = cxgb4_l2t_send(cdev->lldi.ports[0], skb, l2e);
1041 if (ret < 0)
1042 kfree_skb(skb);
1043 return ret < 0 ? ret : 0;
1044}
1045
1046static void cxgbit_send_rx_credits(struct cxgbit_sock *csk, struct sk_buff *skb)
1047{
1048 if (csk->com.state != CSK_STATE_ESTABLISHED) {
1049 __kfree_skb(skb);
1050 return;
1051 }
1052
1053 cxgbit_ofld_send(csk->com.cdev, skb);
1054}
1055
1056
1057
1058
1059
1060
1061int cxgbit_rx_data_ack(struct cxgbit_sock *csk)
1062{
1063 struct sk_buff *skb;
1064 u32 len = roundup(sizeof(struct cpl_rx_data_ack), 16);
1065 u32 credit_dack;
1066
1067 skb = alloc_skb(len, GFP_KERNEL);
1068 if (!skb)
1069 return -1;
1070
1071 credit_dack = RX_DACK_CHANGE_F | RX_DACK_MODE_V(1) |
1072 RX_CREDITS_V(csk->rx_credits);
1073
1074 cxgb_mk_rx_data_ack(skb, len, csk->tid, csk->ctrlq_idx,
1075 credit_dack);
1076
1077 csk->rx_credits = 0;
1078
1079 spin_lock_bh(&csk->lock);
1080 if (csk->lock_owner) {
1081 cxgbit_skcb_rx_backlog_fn(skb) = cxgbit_send_rx_credits;
1082 __skb_queue_tail(&csk->backlogq, skb);
1083 spin_unlock_bh(&csk->lock);
1084 return 0;
1085 }
1086
1087 cxgbit_send_rx_credits(csk, skb);
1088 spin_unlock_bh(&csk->lock);
1089
1090 return 0;
1091}
1092
1093#define FLOWC_WR_NPARAMS_MIN 9
1094#define FLOWC_WR_NPARAMS_MAX 11
1095static int cxgbit_alloc_csk_skb(struct cxgbit_sock *csk)
1096{
1097 struct sk_buff *skb;
1098 u32 len, flowclen;
1099 u8 i;
1100
1101 flowclen = offsetof(struct fw_flowc_wr,
1102 mnemval[FLOWC_WR_NPARAMS_MAX]);
1103
1104 len = max_t(u32, sizeof(struct cpl_abort_req),
1105 sizeof(struct cpl_abort_rpl));
1106
1107 len = max(len, flowclen);
1108 len = roundup(len, 16);
1109
1110 for (i = 0; i < 3; i++) {
1111 skb = alloc_skb(len, GFP_ATOMIC);
1112 if (!skb)
1113 goto out;
1114 __skb_queue_tail(&csk->skbq, skb);
1115 }
1116
1117 skb = alloc_skb(LRO_SKB_MIN_HEADROOM, GFP_ATOMIC);
1118 if (!skb)
1119 goto out;
1120
1121 memset(skb->data, 0, LRO_SKB_MIN_HEADROOM);
1122 csk->lro_hskb = skb;
1123
1124 return 0;
1125out:
1126 __skb_queue_purge(&csk->skbq);
1127 return -ENOMEM;
1128}
1129
1130static void
1131cxgbit_pass_accept_rpl(struct cxgbit_sock *csk, struct cpl_pass_accept_req *req)
1132{
1133 struct sk_buff *skb;
1134 const struct tcphdr *tcph;
1135 struct cpl_t5_pass_accept_rpl *rpl5;
1136 struct cxgb4_lld_info *lldi = &csk->com.cdev->lldi;
1137 unsigned int len = roundup(sizeof(*rpl5), 16);
1138 unsigned int mtu_idx;
1139 u64 opt0;
1140 u32 opt2, hlen;
1141 u32 wscale;
1142 u32 win;
1143
1144 pr_debug("%s csk %p tid %u\n", __func__, csk, csk->tid);
1145
1146 skb = alloc_skb(len, GFP_ATOMIC);
1147 if (!skb) {
1148 cxgbit_put_csk(csk);
1149 return;
1150 }
1151
1152 rpl5 = __skb_put_zero(skb, len);
1153
1154 INIT_TP_WR(rpl5, csk->tid);
1155 OPCODE_TID(rpl5) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
1156 csk->tid));
1157 cxgb_best_mtu(csk->com.cdev->lldi.mtus, csk->mtu, &mtu_idx,
1158 req->tcpopt.tstamp,
1159 (csk->com.remote_addr.ss_family == AF_INET) ? 0 : 1);
1160 wscale = cxgb_compute_wscale(csk->rcv_win);
1161
1162
1163
1164
1165 win = csk->rcv_win >> 10;
1166 if (win > RCV_BUFSIZ_M)
1167 win = RCV_BUFSIZ_M;
1168 opt0 = TCAM_BYPASS_F |
1169 WND_SCALE_V(wscale) |
1170 MSS_IDX_V(mtu_idx) |
1171 L2T_IDX_V(csk->l2t->idx) |
1172 TX_CHAN_V(csk->tx_chan) |
1173 SMAC_SEL_V(csk->smac_idx) |
1174 DSCP_V(csk->tos >> 2) |
1175 ULP_MODE_V(ULP_MODE_ISCSI) |
1176 RCV_BUFSIZ_V(win);
1177
1178 opt2 = RX_CHANNEL_V(0) |
1179 RSS_QUEUE_VALID_F | RSS_QUEUE_V(csk->rss_qid);
1180
1181 if (!is_t5(lldi->adapter_type))
1182 opt2 |= RX_FC_DISABLE_F;
1183
1184 if (req->tcpopt.tstamp)
1185 opt2 |= TSTAMPS_EN_F;
1186 if (req->tcpopt.sack)
1187 opt2 |= SACK_EN_F;
1188 if (wscale)
1189 opt2 |= WND_SCALE_EN_F;
1190
1191 hlen = ntohl(req->hdr_len);
1192
1193 if (is_t5(lldi->adapter_type))
1194 tcph = (struct tcphdr *)((u8 *)(req + 1) +
1195 ETH_HDR_LEN_G(hlen) + IP_HDR_LEN_G(hlen));
1196 else
1197 tcph = (struct tcphdr *)((u8 *)(req + 1) +
1198 T6_ETH_HDR_LEN_G(hlen) + T6_IP_HDR_LEN_G(hlen));
1199
1200 if (tcph->ece && tcph->cwr)
1201 opt2 |= CCTRL_ECN_V(1);
1202
1203 opt2 |= RX_COALESCE_V(3);
1204 opt2 |= CONG_CNTRL_V(CONG_ALG_NEWRENO);
1205
1206 opt2 |= T5_ISS_F;
1207 rpl5->iss = cpu_to_be32((prandom_u32() & ~7UL) - 1);
1208
1209 opt2 |= T5_OPT_2_VALID_F;
1210
1211 rpl5->opt0 = cpu_to_be64(opt0);
1212 rpl5->opt2 = cpu_to_be32(opt2);
1213 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->ctrlq_idx);
1214 t4_set_arp_err_handler(skb, csk, cxgbit_arp_failure_discard);
1215 cxgbit_l2t_send(csk->com.cdev, skb, csk->l2t);
1216}
1217
1218static void
1219cxgbit_pass_accept_req(struct cxgbit_device *cdev, struct sk_buff *skb)
1220{
1221 struct cxgbit_sock *csk = NULL;
1222 struct cxgbit_np *cnp;
1223 struct cpl_pass_accept_req *req = cplhdr(skb);
1224 unsigned int stid = PASS_OPEN_TID_G(ntohl(req->tos_stid));
1225 struct tid_info *t = cdev->lldi.tids;
1226 unsigned int tid = GET_TID(req);
1227 u16 peer_mss = ntohs(req->tcpopt.mss);
1228 unsigned short hdrs;
1229
1230 struct dst_entry *dst;
1231 __u8 local_ip[16], peer_ip[16];
1232 __be16 local_port, peer_port;
1233 int ret;
1234 int iptype;
1235
1236 pr_debug("%s: cdev = %p; stid = %u; tid = %u\n",
1237 __func__, cdev, stid, tid);
1238
1239 cnp = lookup_stid(t, stid);
1240 if (!cnp) {
1241 pr_err("%s connect request on invalid stid %d\n",
1242 __func__, stid);
1243 goto rel_skb;
1244 }
1245
1246 if (cnp->com.state != CSK_STATE_LISTEN) {
1247 pr_err("%s - listening parent not in CSK_STATE_LISTEN\n",
1248 __func__);
1249 goto reject;
1250 }
1251
1252 csk = lookup_tid(t, tid);
1253 if (csk) {
1254 pr_err("%s csk not null tid %u\n",
1255 __func__, tid);
1256 goto rel_skb;
1257 }
1258
1259 cxgb_get_4tuple(req, cdev->lldi.adapter_type, &iptype, local_ip,
1260 peer_ip, &local_port, &peer_port);
1261
1262
1263 if (iptype == 4) {
1264 pr_debug("%s parent sock %p tid %u laddr %pI4 raddr %pI4 "
1265 "lport %d rport %d peer_mss %d\n"
1266 , __func__, cnp, tid,
1267 local_ip, peer_ip, ntohs(local_port),
1268 ntohs(peer_port), peer_mss);
1269 dst = cxgb_find_route(&cdev->lldi, cxgbit_get_real_dev,
1270 *(__be32 *)local_ip,
1271 *(__be32 *)peer_ip,
1272 local_port, peer_port,
1273 PASS_OPEN_TOS_G(ntohl(req->tos_stid)));
1274 } else {
1275 pr_debug("%s parent sock %p tid %u laddr %pI6 raddr %pI6 "
1276 "lport %d rport %d peer_mss %d\n"
1277 , __func__, cnp, tid,
1278 local_ip, peer_ip, ntohs(local_port),
1279 ntohs(peer_port), peer_mss);
1280 dst = cxgb_find_route6(&cdev->lldi, cxgbit_get_real_dev,
1281 local_ip, peer_ip,
1282 local_port, peer_port,
1283 PASS_OPEN_TOS_G(ntohl(req->tos_stid)),
1284 ((struct sockaddr_in6 *)
1285 &cnp->com.local_addr)->sin6_scope_id);
1286 }
1287 if (!dst) {
1288 pr_err("%s - failed to find dst entry!\n",
1289 __func__);
1290 goto reject;
1291 }
1292
1293 csk = kzalloc(sizeof(*csk), GFP_ATOMIC);
1294 if (!csk) {
1295 dst_release(dst);
1296 goto rel_skb;
1297 }
1298
1299 ret = cxgbit_offload_init(csk, iptype, peer_ip, ntohs(local_port),
1300 dst, cdev);
1301 if (ret) {
1302 pr_err("%s - failed to allocate l2t entry!\n",
1303 __func__);
1304 dst_release(dst);
1305 kfree(csk);
1306 goto reject;
1307 }
1308
1309 kref_init(&csk->kref);
1310 init_completion(&csk->com.wr_wait.completion);
1311
1312 INIT_LIST_HEAD(&csk->accept_node);
1313
1314 hdrs = (iptype == 4 ? sizeof(struct iphdr) : sizeof(struct ipv6hdr)) +
1315 sizeof(struct tcphdr) + (req->tcpopt.tstamp ? 12 : 0);
1316 if (peer_mss && csk->mtu > (peer_mss + hdrs))
1317 csk->mtu = peer_mss + hdrs;
1318
1319 csk->com.state = CSK_STATE_CONNECTING;
1320 csk->com.cdev = cdev;
1321 csk->cnp = cnp;
1322 csk->tos = PASS_OPEN_TOS_G(ntohl(req->tos_stid));
1323 csk->dst = dst;
1324 csk->tid = tid;
1325 csk->wr_cred = cdev->lldi.wr_cred -
1326 DIV_ROUND_UP(sizeof(struct cpl_abort_req), 16);
1327 csk->wr_max_cred = csk->wr_cred;
1328 csk->wr_una_cred = 0;
1329
1330 if (iptype == 4) {
1331 struct sockaddr_in *sin = (struct sockaddr_in *)
1332 &csk->com.local_addr;
1333 sin->sin_family = AF_INET;
1334 sin->sin_port = local_port;
1335 sin->sin_addr.s_addr = *(__be32 *)local_ip;
1336
1337 sin = (struct sockaddr_in *)&csk->com.remote_addr;
1338 sin->sin_family = AF_INET;
1339 sin->sin_port = peer_port;
1340 sin->sin_addr.s_addr = *(__be32 *)peer_ip;
1341 } else {
1342 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)
1343 &csk->com.local_addr;
1344
1345 sin6->sin6_family = PF_INET6;
1346 sin6->sin6_port = local_port;
1347 memcpy(sin6->sin6_addr.s6_addr, local_ip, 16);
1348 cxgb4_clip_get(cdev->lldi.ports[0],
1349 (const u32 *)&sin6->sin6_addr.s6_addr,
1350 1);
1351
1352 sin6 = (struct sockaddr_in6 *)&csk->com.remote_addr;
1353 sin6->sin6_family = PF_INET6;
1354 sin6->sin6_port = peer_port;
1355 memcpy(sin6->sin6_addr.s6_addr, peer_ip, 16);
1356 }
1357
1358 skb_queue_head_init(&csk->rxq);
1359 skb_queue_head_init(&csk->txq);
1360 skb_queue_head_init(&csk->ppodq);
1361 skb_queue_head_init(&csk->backlogq);
1362 skb_queue_head_init(&csk->skbq);
1363 cxgbit_sock_reset_wr_list(csk);
1364 spin_lock_init(&csk->lock);
1365 init_waitqueue_head(&csk->waitq);
1366 csk->lock_owner = false;
1367
1368 if (cxgbit_alloc_csk_skb(csk)) {
1369 dst_release(dst);
1370 kfree(csk);
1371 goto rel_skb;
1372 }
1373
1374 cxgbit_get_cnp(cnp);
1375 cxgbit_get_cdev(cdev);
1376
1377 spin_lock(&cdev->cskq.lock);
1378 list_add_tail(&csk->list, &cdev->cskq.list);
1379 spin_unlock(&cdev->cskq.lock);
1380 cxgb4_insert_tid(t, csk, tid, csk->com.local_addr.ss_family);
1381 cxgbit_pass_accept_rpl(csk, req);
1382 goto rel_skb;
1383
1384reject:
1385 cxgbit_release_tid(cdev, tid);
1386rel_skb:
1387 __kfree_skb(skb);
1388}
1389
1390static u32
1391cxgbit_tx_flowc_wr_credits(struct cxgbit_sock *csk, u32 *nparamsp,
1392 u32 *flowclenp)
1393{
1394 u32 nparams, flowclen16, flowclen;
1395
1396 nparams = FLOWC_WR_NPARAMS_MIN;
1397
1398 if (csk->snd_wscale)
1399 nparams++;
1400
1401#ifdef CONFIG_CHELSIO_T4_DCB
1402 nparams++;
1403#endif
1404 flowclen = offsetof(struct fw_flowc_wr, mnemval[nparams]);
1405 flowclen16 = DIV_ROUND_UP(flowclen, 16);
1406 flowclen = flowclen16 * 16;
1407
1408
1409
1410
1411 if (nparamsp)
1412 *nparamsp = nparams;
1413 if (flowclenp)
1414 *flowclenp = flowclen;
1415 return flowclen16;
1416}
1417
1418u32 cxgbit_send_tx_flowc_wr(struct cxgbit_sock *csk)
1419{
1420 struct cxgbit_device *cdev = csk->com.cdev;
1421 struct fw_flowc_wr *flowc;
1422 u32 nparams, flowclen16, flowclen;
1423 struct sk_buff *skb;
1424 u8 index;
1425
1426#ifdef CONFIG_CHELSIO_T4_DCB
1427 u16 vlan = ((struct l2t_entry *)csk->l2t)->vlan;
1428#endif
1429
1430 flowclen16 = cxgbit_tx_flowc_wr_credits(csk, &nparams, &flowclen);
1431
1432 skb = __skb_dequeue(&csk->skbq);
1433 flowc = __skb_put_zero(skb, flowclen);
1434
1435 flowc->op_to_nparams = cpu_to_be32(FW_WR_OP_V(FW_FLOWC_WR) |
1436 FW_FLOWC_WR_NPARAMS_V(nparams));
1437 flowc->flowid_len16 = cpu_to_be32(FW_WR_LEN16_V(flowclen16) |
1438 FW_WR_FLOWID_V(csk->tid));
1439 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
1440 flowc->mnemval[0].val = cpu_to_be32(FW_PFVF_CMD_PFN_V
1441 (csk->com.cdev->lldi.pf));
1442 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
1443 flowc->mnemval[1].val = cpu_to_be32(csk->tx_chan);
1444 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
1445 flowc->mnemval[2].val = cpu_to_be32(csk->tx_chan);
1446 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
1447 flowc->mnemval[3].val = cpu_to_be32(csk->rss_qid);
1448 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
1449 flowc->mnemval[4].val = cpu_to_be32(csk->snd_nxt);
1450 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
1451 flowc->mnemval[5].val = cpu_to_be32(csk->rcv_nxt);
1452 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
1453 flowc->mnemval[6].val = cpu_to_be32(csk->snd_win);
1454 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
1455 flowc->mnemval[7].val = cpu_to_be32(csk->emss);
1456
1457 flowc->mnemval[8].mnemonic = FW_FLOWC_MNEM_TXDATAPLEN_MAX;
1458 if (test_bit(CDEV_ISO_ENABLE, &cdev->flags))
1459 flowc->mnemval[8].val = cpu_to_be32(CXGBIT_MAX_ISO_PAYLOAD);
1460 else
1461 flowc->mnemval[8].val = cpu_to_be32(16384);
1462
1463 index = 9;
1464
1465 if (csk->snd_wscale) {
1466 flowc->mnemval[index].mnemonic = FW_FLOWC_MNEM_RCV_SCALE;
1467 flowc->mnemval[index].val = cpu_to_be32(csk->snd_wscale);
1468 index++;
1469 }
1470
1471#ifdef CONFIG_CHELSIO_T4_DCB
1472 flowc->mnemval[index].mnemonic = FW_FLOWC_MNEM_DCBPRIO;
1473 if (vlan == VLAN_NONE) {
1474 pr_warn("csk %u without VLAN Tag on DCB Link\n", csk->tid);
1475 flowc->mnemval[index].val = cpu_to_be32(0);
1476 } else
1477 flowc->mnemval[index].val = cpu_to_be32(
1478 (vlan & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT);
1479#endif
1480
1481 pr_debug("%s: csk %p; tx_chan = %u; rss_qid = %u; snd_seq = %u;"
1482 " rcv_seq = %u; snd_win = %u; emss = %u\n",
1483 __func__, csk, csk->tx_chan, csk->rss_qid, csk->snd_nxt,
1484 csk->rcv_nxt, csk->snd_win, csk->emss);
1485 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->txq_idx);
1486 cxgbit_ofld_send(csk->com.cdev, skb);
1487 return flowclen16;
1488}
1489
1490static int
1491cxgbit_send_tcb_skb(struct cxgbit_sock *csk, struct sk_buff *skb)
1492{
1493 spin_lock_bh(&csk->lock);
1494 if (unlikely(csk->com.state != CSK_STATE_ESTABLISHED)) {
1495 spin_unlock_bh(&csk->lock);
1496 pr_err("%s: csk 0x%p, tid %u, state %u\n",
1497 __func__, csk, csk->tid, csk->com.state);
1498 __kfree_skb(skb);
1499 return -1;
1500 }
1501
1502 cxgbit_get_csk(csk);
1503 cxgbit_init_wr_wait(&csk->com.wr_wait);
1504 cxgbit_ofld_send(csk->com.cdev, skb);
1505 spin_unlock_bh(&csk->lock);
1506
1507 return 0;
1508}
1509
1510int cxgbit_setup_conn_digest(struct cxgbit_sock *csk)
1511{
1512 struct sk_buff *skb;
1513 struct cpl_set_tcb_field *req;
1514 u8 hcrc = csk->submode & CXGBIT_SUBMODE_HCRC;
1515 u8 dcrc = csk->submode & CXGBIT_SUBMODE_DCRC;
1516 unsigned int len = roundup(sizeof(*req), 16);
1517 int ret;
1518
1519 skb = alloc_skb(len, GFP_KERNEL);
1520 if (!skb)
1521 return -ENOMEM;
1522
1523
1524 req = __skb_put_zero(skb, len);
1525
1526 INIT_TP_WR(req, csk->tid);
1527 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid));
1528 req->reply_ctrl = htons(NO_REPLY_V(0) | QUEUENO_V(csk->rss_qid));
1529 req->word_cookie = htons(0);
1530 req->mask = cpu_to_be64(0x3 << 4);
1531 req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) |
1532 (dcrc ? ULP_CRC_DATA : 0)) << 4);
1533 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->ctrlq_idx);
1534
1535 if (cxgbit_send_tcb_skb(csk, skb))
1536 return -1;
1537
1538 ret = cxgbit_wait_for_reply(csk->com.cdev,
1539 &csk->com.wr_wait,
1540 csk->tid, 5, __func__);
1541 if (ret)
1542 return -1;
1543
1544 return 0;
1545}
1546
1547int cxgbit_setup_conn_pgidx(struct cxgbit_sock *csk, u32 pg_idx)
1548{
1549 struct sk_buff *skb;
1550 struct cpl_set_tcb_field *req;
1551 unsigned int len = roundup(sizeof(*req), 16);
1552 int ret;
1553
1554 skb = alloc_skb(len, GFP_KERNEL);
1555 if (!skb)
1556 return -ENOMEM;
1557
1558 req = __skb_put_zero(skb, len);
1559
1560 INIT_TP_WR(req, csk->tid);
1561 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid));
1562 req->reply_ctrl = htons(NO_REPLY_V(0) | QUEUENO_V(csk->rss_qid));
1563 req->word_cookie = htons(0);
1564 req->mask = cpu_to_be64(0x3 << 8);
1565 req->val = cpu_to_be64(pg_idx << 8);
1566 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->ctrlq_idx);
1567
1568 if (cxgbit_send_tcb_skb(csk, skb))
1569 return -1;
1570
1571 ret = cxgbit_wait_for_reply(csk->com.cdev,
1572 &csk->com.wr_wait,
1573 csk->tid, 5, __func__);
1574 if (ret)
1575 return -1;
1576
1577 return 0;
1578}
1579
1580static void
1581cxgbit_pass_open_rpl(struct cxgbit_device *cdev, struct sk_buff *skb)
1582{
1583 struct cpl_pass_open_rpl *rpl = cplhdr(skb);
1584 struct tid_info *t = cdev->lldi.tids;
1585 unsigned int stid = GET_TID(rpl);
1586 struct cxgbit_np *cnp = lookup_stid(t, stid);
1587
1588 pr_debug("%s: cnp = %p; stid = %u; status = %d\n",
1589 __func__, cnp, stid, rpl->status);
1590
1591 if (!cnp) {
1592 pr_info("%s stid %d lookup failure\n", __func__, stid);
1593 goto rel_skb;
1594 }
1595
1596 cxgbit_wake_up(&cnp->com.wr_wait, __func__, rpl->status);
1597 cxgbit_put_cnp(cnp);
1598rel_skb:
1599 __kfree_skb(skb);
1600}
1601
1602static void
1603cxgbit_close_listsrv_rpl(struct cxgbit_device *cdev, struct sk_buff *skb)
1604{
1605 struct cpl_close_listsvr_rpl *rpl = cplhdr(skb);
1606 struct tid_info *t = cdev->lldi.tids;
1607 unsigned int stid = GET_TID(rpl);
1608 struct cxgbit_np *cnp = lookup_stid(t, stid);
1609
1610 pr_debug("%s: cnp = %p; stid = %u; status = %d\n",
1611 __func__, cnp, stid, rpl->status);
1612
1613 if (!cnp) {
1614 pr_info("%s stid %d lookup failure\n", __func__, stid);
1615 goto rel_skb;
1616 }
1617
1618 cxgbit_wake_up(&cnp->com.wr_wait, __func__, rpl->status);
1619 cxgbit_put_cnp(cnp);
1620rel_skb:
1621 __kfree_skb(skb);
1622}
1623
1624static void
1625cxgbit_pass_establish(struct cxgbit_device *cdev, struct sk_buff *skb)
1626{
1627 struct cpl_pass_establish *req = cplhdr(skb);
1628 struct tid_info *t = cdev->lldi.tids;
1629 unsigned int tid = GET_TID(req);
1630 struct cxgbit_sock *csk;
1631 struct cxgbit_np *cnp;
1632 u16 tcp_opt = be16_to_cpu(req->tcp_opt);
1633 u32 snd_isn = be32_to_cpu(req->snd_isn);
1634 u32 rcv_isn = be32_to_cpu(req->rcv_isn);
1635
1636 csk = lookup_tid(t, tid);
1637 if (unlikely(!csk)) {
1638 pr_err("can't find connection for tid %u.\n", tid);
1639 goto rel_skb;
1640 }
1641 cnp = csk->cnp;
1642
1643 pr_debug("%s: csk %p; tid %u; cnp %p\n",
1644 __func__, csk, tid, cnp);
1645
1646 csk->write_seq = snd_isn;
1647 csk->snd_una = snd_isn;
1648 csk->snd_nxt = snd_isn;
1649
1650 csk->rcv_nxt = rcv_isn;
1651
1652 if (csk->rcv_win > (RCV_BUFSIZ_M << 10))
1653 csk->rx_credits = (csk->rcv_win - (RCV_BUFSIZ_M << 10));
1654
1655 csk->snd_wscale = TCPOPT_SND_WSCALE_G(tcp_opt);
1656 cxgbit_set_emss(csk, tcp_opt);
1657 dst_confirm(csk->dst);
1658 csk->com.state = CSK_STATE_ESTABLISHED;
1659 spin_lock_bh(&cnp->np_accept_lock);
1660 list_add_tail(&csk->accept_node, &cnp->np_accept_list);
1661 spin_unlock_bh(&cnp->np_accept_lock);
1662 complete(&cnp->accept_comp);
1663rel_skb:
1664 __kfree_skb(skb);
1665}
1666
1667static void cxgbit_queue_rx_skb(struct cxgbit_sock *csk, struct sk_buff *skb)
1668{
1669 cxgbit_skcb_flags(skb) = 0;
1670 spin_lock_bh(&csk->rxq.lock);
1671 __skb_queue_tail(&csk->rxq, skb);
1672 spin_unlock_bh(&csk->rxq.lock);
1673 wake_up(&csk->waitq);
1674}
1675
1676static void cxgbit_peer_close(struct cxgbit_sock *csk, struct sk_buff *skb)
1677{
1678 pr_debug("%s: csk %p; tid %u; state %d\n",
1679 __func__, csk, csk->tid, csk->com.state);
1680
1681 switch (csk->com.state) {
1682 case CSK_STATE_ESTABLISHED:
1683 csk->com.state = CSK_STATE_CLOSING;
1684 cxgbit_queue_rx_skb(csk, skb);
1685 return;
1686 case CSK_STATE_CLOSING:
1687
1688 csk->com.state = CSK_STATE_MORIBUND;
1689 break;
1690 case CSK_STATE_MORIBUND:
1691 csk->com.state = CSK_STATE_DEAD;
1692 cxgbit_put_csk(csk);
1693 break;
1694 case CSK_STATE_ABORTING:
1695 break;
1696 default:
1697 pr_info("%s: cpl_peer_close in bad state %d\n",
1698 __func__, csk->com.state);
1699 }
1700
1701 __kfree_skb(skb);
1702}
1703
1704static void cxgbit_close_con_rpl(struct cxgbit_sock *csk, struct sk_buff *skb)
1705{
1706 pr_debug("%s: csk %p; tid %u; state %d\n",
1707 __func__, csk, csk->tid, csk->com.state);
1708
1709 switch (csk->com.state) {
1710 case CSK_STATE_CLOSING:
1711 csk->com.state = CSK_STATE_MORIBUND;
1712 break;
1713 case CSK_STATE_MORIBUND:
1714 csk->com.state = CSK_STATE_DEAD;
1715 cxgbit_put_csk(csk);
1716 break;
1717 case CSK_STATE_ABORTING:
1718 case CSK_STATE_DEAD:
1719 break;
1720 default:
1721 pr_info("%s: cpl_close_con_rpl in bad state %d\n",
1722 __func__, csk->com.state);
1723 }
1724
1725 __kfree_skb(skb);
1726}
1727
1728static void cxgbit_abort_req_rss(struct cxgbit_sock *csk, struct sk_buff *skb)
1729{
1730 struct cpl_abort_req_rss *hdr = cplhdr(skb);
1731 unsigned int tid = GET_TID(hdr);
1732 struct sk_buff *rpl_skb;
1733 bool release = false;
1734 bool wakeup_thread = false;
1735 u32 len = roundup(sizeof(struct cpl_abort_rpl), 16);
1736
1737 pr_debug("%s: csk %p; tid %u; state %d\n",
1738 __func__, csk, tid, csk->com.state);
1739
1740 if (cxgb_is_neg_adv(hdr->status)) {
1741 pr_err("%s: got neg advise %d on tid %u\n",
1742 __func__, hdr->status, tid);
1743 goto rel_skb;
1744 }
1745
1746 switch (csk->com.state) {
1747 case CSK_STATE_CONNECTING:
1748 case CSK_STATE_MORIBUND:
1749 csk->com.state = CSK_STATE_DEAD;
1750 release = true;
1751 break;
1752 case CSK_STATE_ESTABLISHED:
1753 csk->com.state = CSK_STATE_DEAD;
1754 wakeup_thread = true;
1755 break;
1756 case CSK_STATE_CLOSING:
1757 csk->com.state = CSK_STATE_DEAD;
1758 if (!csk->conn)
1759 release = true;
1760 break;
1761 case CSK_STATE_ABORTING:
1762 break;
1763 default:
1764 pr_info("%s: cpl_abort_req_rss in bad state %d\n",
1765 __func__, csk->com.state);
1766 csk->com.state = CSK_STATE_DEAD;
1767 }
1768
1769 __skb_queue_purge(&csk->txq);
1770
1771 if (!test_and_set_bit(CSK_TX_DATA_SENT, &csk->com.flags))
1772 cxgbit_send_tx_flowc_wr(csk);
1773
1774 rpl_skb = __skb_dequeue(&csk->skbq);
1775
1776 cxgb_mk_abort_rpl(rpl_skb, len, csk->tid, csk->txq_idx);
1777 cxgbit_ofld_send(csk->com.cdev, rpl_skb);
1778
1779 if (wakeup_thread) {
1780 cxgbit_queue_rx_skb(csk, skb);
1781 return;
1782 }
1783
1784 if (release)
1785 cxgbit_put_csk(csk);
1786rel_skb:
1787 __kfree_skb(skb);
1788}
1789
1790static void cxgbit_abort_rpl_rss(struct cxgbit_sock *csk, struct sk_buff *skb)
1791{
1792 struct cpl_abort_rpl_rss *rpl = cplhdr(skb);
1793
1794 pr_debug("%s: csk %p; tid %u; state %d\n",
1795 __func__, csk, csk->tid, csk->com.state);
1796
1797 switch (csk->com.state) {
1798 case CSK_STATE_ABORTING:
1799 csk->com.state = CSK_STATE_DEAD;
1800 if (test_bit(CSK_ABORT_RPL_WAIT, &csk->com.flags))
1801 cxgbit_wake_up(&csk->com.wr_wait, __func__,
1802 rpl->status);
1803 cxgbit_put_csk(csk);
1804 break;
1805 default:
1806 pr_info("%s: cpl_abort_rpl_rss in state %d\n",
1807 __func__, csk->com.state);
1808 }
1809
1810 __kfree_skb(skb);
1811}
1812
1813static bool cxgbit_credit_err(const struct cxgbit_sock *csk)
1814{
1815 const struct sk_buff *skb = csk->wr_pending_head;
1816 u32 credit = 0;
1817
1818 if (unlikely(csk->wr_cred > csk->wr_max_cred)) {
1819 pr_err("csk 0x%p, tid %u, credit %u > %u\n",
1820 csk, csk->tid, csk->wr_cred, csk->wr_max_cred);
1821 return true;
1822 }
1823
1824 while (skb) {
1825 credit += (__force u32)skb->csum;
1826 skb = cxgbit_skcb_tx_wr_next(skb);
1827 }
1828
1829 if (unlikely((csk->wr_cred + credit) != csk->wr_max_cred)) {
1830 pr_err("csk 0x%p, tid %u, credit %u + %u != %u.\n",
1831 csk, csk->tid, csk->wr_cred,
1832 credit, csk->wr_max_cred);
1833
1834 return true;
1835 }
1836
1837 return false;
1838}
1839
1840static void cxgbit_fw4_ack(struct cxgbit_sock *csk, struct sk_buff *skb)
1841{
1842 struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)cplhdr(skb);
1843 u32 credits = rpl->credits;
1844 u32 snd_una = ntohl(rpl->snd_una);
1845
1846 csk->wr_cred += credits;
1847 if (csk->wr_una_cred > (csk->wr_max_cred - csk->wr_cred))
1848 csk->wr_una_cred = csk->wr_max_cred - csk->wr_cred;
1849
1850 while (credits) {
1851 struct sk_buff *p = cxgbit_sock_peek_wr(csk);
1852 u32 csum;
1853
1854 if (unlikely(!p)) {
1855 pr_err("csk 0x%p,%u, cr %u,%u+%u, empty.\n",
1856 csk, csk->tid, credits,
1857 csk->wr_cred, csk->wr_una_cred);
1858 break;
1859 }
1860
1861 csum = (__force u32)p->csum;
1862 if (unlikely(credits < csum)) {
1863 pr_warn("csk 0x%p,%u, cr %u,%u+%u, < %u.\n",
1864 csk, csk->tid,
1865 credits, csk->wr_cred, csk->wr_una_cred,
1866 csum);
1867 p->csum = (__force __wsum)(csum - credits);
1868 break;
1869 }
1870
1871 cxgbit_sock_dequeue_wr(csk);
1872 credits -= csum;
1873 kfree_skb(p);
1874 }
1875
1876 if (unlikely(cxgbit_credit_err(csk))) {
1877 cxgbit_queue_rx_skb(csk, skb);
1878 return;
1879 }
1880
1881 if (rpl->seq_vld & CPL_FW4_ACK_FLAGS_SEQVAL) {
1882 if (unlikely(before(snd_una, csk->snd_una))) {
1883 pr_warn("csk 0x%p,%u, snd_una %u/%u.",
1884 csk, csk->tid, snd_una,
1885 csk->snd_una);
1886 goto rel_skb;
1887 }
1888
1889 if (csk->snd_una != snd_una) {
1890 csk->snd_una = snd_una;
1891 dst_confirm(csk->dst);
1892 }
1893 }
1894
1895 if (skb_queue_len(&csk->txq))
1896 cxgbit_push_tx_frames(csk);
1897
1898rel_skb:
1899 __kfree_skb(skb);
1900}
1901
1902static void cxgbit_set_tcb_rpl(struct cxgbit_device *cdev, struct sk_buff *skb)
1903{
1904 struct cxgbit_sock *csk;
1905 struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data;
1906 unsigned int tid = GET_TID(rpl);
1907 struct cxgb4_lld_info *lldi = &cdev->lldi;
1908 struct tid_info *t = lldi->tids;
1909
1910 csk = lookup_tid(t, tid);
1911 if (unlikely(!csk)) {
1912 pr_err("can't find connection for tid %u.\n", tid);
1913 goto rel_skb;
1914 } else {
1915 cxgbit_wake_up(&csk->com.wr_wait, __func__, rpl->status);
1916 }
1917
1918 cxgbit_put_csk(csk);
1919rel_skb:
1920 __kfree_skb(skb);
1921}
1922
1923static void cxgbit_rx_data(struct cxgbit_device *cdev, struct sk_buff *skb)
1924{
1925 struct cxgbit_sock *csk;
1926 struct cpl_rx_data *cpl = cplhdr(skb);
1927 unsigned int tid = GET_TID(cpl);
1928 struct cxgb4_lld_info *lldi = &cdev->lldi;
1929 struct tid_info *t = lldi->tids;
1930
1931 csk = lookup_tid(t, tid);
1932 if (unlikely(!csk)) {
1933 pr_err("can't find conn. for tid %u.\n", tid);
1934 goto rel_skb;
1935 }
1936
1937 cxgbit_queue_rx_skb(csk, skb);
1938 return;
1939rel_skb:
1940 __kfree_skb(skb);
1941}
1942
1943static void
1944__cxgbit_process_rx_cpl(struct cxgbit_sock *csk, struct sk_buff *skb)
1945{
1946 spin_lock(&csk->lock);
1947 if (csk->lock_owner) {
1948 __skb_queue_tail(&csk->backlogq, skb);
1949 spin_unlock(&csk->lock);
1950 return;
1951 }
1952
1953 cxgbit_skcb_rx_backlog_fn(skb)(csk, skb);
1954 spin_unlock(&csk->lock);
1955}
1956
1957static void cxgbit_process_rx_cpl(struct cxgbit_sock *csk, struct sk_buff *skb)
1958{
1959 cxgbit_get_csk(csk);
1960 __cxgbit_process_rx_cpl(csk, skb);
1961 cxgbit_put_csk(csk);
1962}
1963
1964static void cxgbit_rx_cpl(struct cxgbit_device *cdev, struct sk_buff *skb)
1965{
1966 struct cxgbit_sock *csk;
1967 struct cpl_tx_data *cpl = cplhdr(skb);
1968 struct cxgb4_lld_info *lldi = &cdev->lldi;
1969 struct tid_info *t = lldi->tids;
1970 unsigned int tid = GET_TID(cpl);
1971 u8 opcode = cxgbit_skcb_rx_opcode(skb);
1972 bool ref = true;
1973
1974 switch (opcode) {
1975 case CPL_FW4_ACK:
1976 cxgbit_skcb_rx_backlog_fn(skb) = cxgbit_fw4_ack;
1977 ref = false;
1978 break;
1979 case CPL_PEER_CLOSE:
1980 cxgbit_skcb_rx_backlog_fn(skb) = cxgbit_peer_close;
1981 break;
1982 case CPL_CLOSE_CON_RPL:
1983 cxgbit_skcb_rx_backlog_fn(skb) = cxgbit_close_con_rpl;
1984 break;
1985 case CPL_ABORT_REQ_RSS:
1986 cxgbit_skcb_rx_backlog_fn(skb) = cxgbit_abort_req_rss;
1987 break;
1988 case CPL_ABORT_RPL_RSS:
1989 cxgbit_skcb_rx_backlog_fn(skb) = cxgbit_abort_rpl_rss;
1990 break;
1991 default:
1992 goto rel_skb;
1993 }
1994
1995 csk = lookup_tid(t, tid);
1996 if (unlikely(!csk)) {
1997 pr_err("can't find conn. for tid %u.\n", tid);
1998 goto rel_skb;
1999 }
2000
2001 if (ref)
2002 cxgbit_process_rx_cpl(csk, skb);
2003 else
2004 __cxgbit_process_rx_cpl(csk, skb);
2005
2006 return;
2007rel_skb:
2008 __kfree_skb(skb);
2009}
2010
2011cxgbit_cplhandler_func cxgbit_cplhandlers[NUM_CPL_CMDS] = {
2012 [CPL_PASS_OPEN_RPL] = cxgbit_pass_open_rpl,
2013 [CPL_CLOSE_LISTSRV_RPL] = cxgbit_close_listsrv_rpl,
2014 [CPL_PASS_ACCEPT_REQ] = cxgbit_pass_accept_req,
2015 [CPL_PASS_ESTABLISH] = cxgbit_pass_establish,
2016 [CPL_SET_TCB_RPL] = cxgbit_set_tcb_rpl,
2017 [CPL_RX_DATA] = cxgbit_rx_data,
2018 [CPL_FW4_ACK] = cxgbit_rx_cpl,
2019 [CPL_PEER_CLOSE] = cxgbit_rx_cpl,
2020 [CPL_CLOSE_CON_RPL] = cxgbit_rx_cpl,
2021 [CPL_ABORT_REQ_RSS] = cxgbit_rx_cpl,
2022 [CPL_ABORT_RPL_RSS] = cxgbit_rx_cpl,
2023};
2024
