1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (c) 2016 Chelsio Communications, Inc.
4 */
5
6 #include <linux/module.h>
7 #include <linux/list.h>
8 #include <linux/workqueue.h>
9 #include <linux/skbuff.h>
10 #include <linux/timer.h>
11 #include <linux/notifier.h>
12 #include <linux/inetdevice.h>
13 #include <linux/ip.h>
14 #include <linux/tcp.h>
15 #include <linux/if_vlan.h>
16
17 #include <net/neighbour.h>
18 #include <net/netevent.h>
19 #include <net/route.h>
20 #include <net/tcp.h>
21 #include <net/ip6_route.h>
22 #include <net/addrconf.h>
23
24 #include <libcxgb_cm.h>
25 #include "cxgbit.h"
26 #include "clip_tbl.h"
27
cxgbit_init_wr_wait(struct cxgbit_wr_wait * wr_waitp)28 static void cxgbit_init_wr_wait(struct cxgbit_wr_wait *wr_waitp)
29 {
30 wr_waitp->ret = 0;
31 reinit_completion(&wr_waitp->completion);
32 }
33
34 static void
cxgbit_wake_up(struct cxgbit_wr_wait * wr_waitp,const char * func,u8 ret)35 cxgbit_wake_up(struct cxgbit_wr_wait *wr_waitp, const char *func, u8 ret)
36 {
37 if (ret == CPL_ERR_NONE)
38 wr_waitp->ret = 0;
39 else
40 wr_waitp->ret = -EIO;
41
42 if (wr_waitp->ret)
43 pr_err("%s: err:%u", func, ret);
44
45 complete(&wr_waitp->completion);
46 }
47
48 static int
cxgbit_wait_for_reply(struct cxgbit_device * cdev,struct cxgbit_wr_wait * wr_waitp,u32 tid,u32 timeout,const char * func)49 cxgbit_wait_for_reply(struct cxgbit_device *cdev,
50 struct cxgbit_wr_wait *wr_waitp, u32 tid, u32 timeout,
51 const char *func)
52 {
53 int ret;
54
55 if (!test_bit(CDEV_STATE_UP, &cdev->flags)) {
56 wr_waitp->ret = -EIO;
57 goto out;
58 }
59
60 ret = wait_for_completion_timeout(&wr_waitp->completion, timeout * HZ);
61 if (!ret) {
62 pr_info("%s - Device %s not responding tid %u\n",
63 func, pci_name(cdev->lldi.pdev), tid);
64 wr_waitp->ret = -ETIMEDOUT;
65 }
66 out:
67 if (wr_waitp->ret)
68 pr_info("%s: FW reply %d tid %u\n",
69 pci_name(cdev->lldi.pdev), wr_waitp->ret, tid);
70 return wr_waitp->ret;
71 }
72
cxgbit_np_hashfn(const struct cxgbit_np * cnp)73 static int cxgbit_np_hashfn(const struct cxgbit_np *cnp)
74 {
75 return ((unsigned long)cnp >> 10) & (NP_INFO_HASH_SIZE - 1);
76 }
77
78 static struct np_info *
cxgbit_np_hash_add(struct cxgbit_device * cdev,struct cxgbit_np * cnp,unsigned int stid)79 cxgbit_np_hash_add(struct cxgbit_device *cdev, struct cxgbit_np *cnp,
80 unsigned int stid)
81 {
82 struct np_info *p = kzalloc(sizeof(*p), GFP_KERNEL);
83
84 if (p) {
85 int bucket = cxgbit_np_hashfn(cnp);
86
87 p->cnp = cnp;
88 p->stid = stid;
89 spin_lock(&cdev->np_lock);
90 p->next = cdev->np_hash_tab[bucket];
91 cdev->np_hash_tab[bucket] = p;
92 spin_unlock(&cdev->np_lock);
93 }
94
95 return p;
96 }
97
98 static int
cxgbit_np_hash_find(struct cxgbit_device * cdev,struct cxgbit_np * cnp)99 cxgbit_np_hash_find(struct cxgbit_device *cdev, struct cxgbit_np *cnp)
100 {
101 int stid = -1, bucket = cxgbit_np_hashfn(cnp);
102 struct np_info *p;
103
104 spin_lock(&cdev->np_lock);
105 for (p = cdev->np_hash_tab[bucket]; p; p = p->next) {
106 if (p->cnp == cnp) {
107 stid = p->stid;
108 break;
109 }
110 }
111 spin_unlock(&cdev->np_lock);
112
113 return stid;
114 }
115
cxgbit_np_hash_del(struct cxgbit_device * cdev,struct cxgbit_np * cnp)116 static int cxgbit_np_hash_del(struct cxgbit_device *cdev, struct cxgbit_np *cnp)
117 {
118 int stid = -1, bucket = cxgbit_np_hashfn(cnp);
119 struct np_info *p, **prev = &cdev->np_hash_tab[bucket];
120
121 spin_lock(&cdev->np_lock);
122 for (p = *prev; p; prev = &p->next, p = p->next) {
123 if (p->cnp == cnp) {
124 stid = p->stid;
125 *prev = p->next;
126 kfree(p);
127 break;
128 }
129 }
130 spin_unlock(&cdev->np_lock);
131
132 return stid;
133 }
134
_cxgbit_free_cnp(struct kref * kref)135 void _cxgbit_free_cnp(struct kref *kref)
136 {
137 struct cxgbit_np *cnp;
138
139 cnp = container_of(kref, struct cxgbit_np, kref);
140 kfree(cnp);
141 }
142
143 static int
cxgbit_create_server6(struct cxgbit_device * cdev,unsigned int stid,struct cxgbit_np * cnp)144 cxgbit_create_server6(struct cxgbit_device *cdev, unsigned int stid,
145 struct cxgbit_np *cnp)
146 {
147 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)
148 &cnp->com.local_addr;
149 int addr_type;
150 int ret;
151
152 pr_debug("%s: dev = %s; stid = %u; sin6_port = %u\n",
153 __func__, cdev->lldi.ports[0]->name, stid, sin6->sin6_port);
154
155 addr_type = ipv6_addr_type((const struct in6_addr *)
156 &sin6->sin6_addr);
157 if (addr_type != IPV6_ADDR_ANY) {
158 ret = cxgb4_clip_get(cdev->lldi.ports[0],
159 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
160 if (ret) {
161 pr_err("Unable to find clip table entry. laddr %pI6. Error:%d.\n",
162 sin6->sin6_addr.s6_addr, ret);
163 return -ENOMEM;
164 }
165 }
166
167 cxgbit_get_cnp(cnp);
168 cxgbit_init_wr_wait(&cnp->com.wr_wait);
169
170 ret = cxgb4_create_server6(cdev->lldi.ports[0],
171 stid, &sin6->sin6_addr,
172 sin6->sin6_port,
173 cdev->lldi.rxq_ids[0]);
174 if (!ret)
175 ret = cxgbit_wait_for_reply(cdev, &cnp->com.wr_wait,
176 0, 10, __func__);
177 else if (ret > 0)
178 ret = net_xmit_errno(ret);
179 else
180 cxgbit_put_cnp(cnp);
181
182 if (ret) {
183 if (ret != -ETIMEDOUT)
184 cxgb4_clip_release(cdev->lldi.ports[0],
185 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
186
187 pr_err("create server6 err %d stid %d laddr %pI6 lport %d\n",
188 ret, stid, sin6->sin6_addr.s6_addr,
189 ntohs(sin6->sin6_port));
190 }
191
192 return ret;
193 }
194
195 static int
cxgbit_create_server4(struct cxgbit_device * cdev,unsigned int stid,struct cxgbit_np * cnp)196 cxgbit_create_server4(struct cxgbit_device *cdev, unsigned int stid,
197 struct cxgbit_np *cnp)
198 {
199 struct sockaddr_in *sin = (struct sockaddr_in *)
200 &cnp->com.local_addr;
201 int ret;
202
203 pr_debug("%s: dev = %s; stid = %u; sin_port = %u\n",
204 __func__, cdev->lldi.ports[0]->name, stid, sin->sin_port);
205
206 cxgbit_get_cnp(cnp);
207 cxgbit_init_wr_wait(&cnp->com.wr_wait);
208
209 ret = cxgb4_create_server(cdev->lldi.ports[0],
210 stid, sin->sin_addr.s_addr,
211 sin->sin_port, 0,
212 cdev->lldi.rxq_ids[0]);
213 if (!ret)
214 ret = cxgbit_wait_for_reply(cdev,
215 &cnp->com.wr_wait,
216 0, 10, __func__);
217 else if (ret > 0)
218 ret = net_xmit_errno(ret);
219 else
220 cxgbit_put_cnp(cnp);
221
222 if (ret)
223 pr_err("create server failed err %d stid %d laddr %pI4 lport %d\n",
224 ret, stid, &sin->sin_addr, ntohs(sin->sin_port));
225 return ret;
226 }
227
cxgbit_find_device(struct net_device * ndev,u8 * port_id)228 struct cxgbit_device *cxgbit_find_device(struct net_device *ndev, u8 *port_id)
229 {
230 struct cxgbit_device *cdev;
231 u8 i;
232
233 list_for_each_entry(cdev, &cdev_list_head, list) {
234 struct cxgb4_lld_info *lldi = &cdev->lldi;
235
236 for (i = 0; i < lldi->nports; i++) {
237 if (lldi->ports[i] == ndev) {
238 if (port_id)
239 *port_id = i;
240 return cdev;
241 }
242 }
243 }
244
245 return NULL;
246 }
247
cxgbit_get_real_dev(struct net_device * ndev)248 static struct net_device *cxgbit_get_real_dev(struct net_device *ndev)
249 {
250 if (ndev->priv_flags & IFF_BONDING) {
251 pr_err("Bond devices are not supported. Interface:%s\n",
252 ndev->name);
253 return NULL;
254 }
255
256 if (is_vlan_dev(ndev))
257 return vlan_dev_real_dev(ndev);
258
259 return ndev;
260 }
261
cxgbit_ipv4_netdev(__be32 saddr)262 static struct net_device *cxgbit_ipv4_netdev(__be32 saddr)
263 {
264 struct net_device *ndev;
265
266 ndev = __ip_dev_find(&init_net, saddr, false);
267 if (!ndev)
268 return NULL;
269
270 return cxgbit_get_real_dev(ndev);
271 }
272
cxgbit_ipv6_netdev(struct in6_addr * addr6)273 static struct net_device *cxgbit_ipv6_netdev(struct in6_addr *addr6)
274 {
275 struct net_device *ndev = NULL;
276 bool found = false;
277
278 if (IS_ENABLED(CONFIG_IPV6)) {
279 for_each_netdev_rcu(&init_net, ndev)
280 if (ipv6_chk_addr(&init_net, addr6, ndev, 1)) {
281 found = true;
282 break;
283 }
284 }
285 if (!found)
286 return NULL;
287 return cxgbit_get_real_dev(ndev);
288 }
289
cxgbit_find_np_cdev(struct cxgbit_np * cnp)290 static struct cxgbit_device *cxgbit_find_np_cdev(struct cxgbit_np *cnp)
291 {
292 struct sockaddr_storage *sockaddr = &cnp->com.local_addr;
293 int ss_family = sockaddr->ss_family;
294 struct net_device *ndev = NULL;
295 struct cxgbit_device *cdev = NULL;
296
297 rcu_read_lock();
298 if (ss_family == AF_INET) {
299 struct sockaddr_in *sin;
300
301 sin = (struct sockaddr_in *)sockaddr;
302 ndev = cxgbit_ipv4_netdev(sin->sin_addr.s_addr);
303 } else if (ss_family == AF_INET6) {
304 struct sockaddr_in6 *sin6;
305
306 sin6 = (struct sockaddr_in6 *)sockaddr;
307 ndev = cxgbit_ipv6_netdev(&sin6->sin6_addr);
308 }
309 if (!ndev)
310 goto out;
311
312 cdev = cxgbit_find_device(ndev, NULL);
313 out:
314 rcu_read_unlock();
315 return cdev;
316 }
317
cxgbit_inaddr_any(struct cxgbit_np * cnp)318 static bool cxgbit_inaddr_any(struct cxgbit_np *cnp)
319 {
320 struct sockaddr_storage *sockaddr = &cnp->com.local_addr;
321 int ss_family = sockaddr->ss_family;
322 int addr_type;
323
324 if (ss_family == AF_INET) {
325 struct sockaddr_in *sin;
326
327 sin = (struct sockaddr_in *)sockaddr;
328 if (sin->sin_addr.s_addr == htonl(INADDR_ANY))
329 return true;
330 } else if (ss_family == AF_INET6) {
331 struct sockaddr_in6 *sin6;
332
333 sin6 = (struct sockaddr_in6 *)sockaddr;
334 addr_type = ipv6_addr_type((const struct in6_addr *)
335 &sin6->sin6_addr);
336 if (addr_type == IPV6_ADDR_ANY)
337 return true;
338 }
339 return false;
340 }
341
342 static int
__cxgbit_setup_cdev_np(struct cxgbit_device * cdev,struct cxgbit_np * cnp)343 __cxgbit_setup_cdev_np(struct cxgbit_device *cdev, struct cxgbit_np *cnp)
344 {
345 int stid, ret;
346 int ss_family = cnp->com.local_addr.ss_family;
347
348 if (!test_bit(CDEV_STATE_UP, &cdev->flags))
349 return -EINVAL;
350
351 stid = cxgb4_alloc_stid(cdev->lldi.tids, ss_family, cnp);
352 if (stid < 0)
353 return -EINVAL;
354
355 if (!cxgbit_np_hash_add(cdev, cnp, stid)) {
356 cxgb4_free_stid(cdev->lldi.tids, stid, ss_family);
357 return -EINVAL;
358 }
359
360 if (ss_family == AF_INET)
361 ret = cxgbit_create_server4(cdev, stid, cnp);
362 else
363 ret = cxgbit_create_server6(cdev, stid, cnp);
364
365 if (ret) {
366 if (ret != -ETIMEDOUT)
367 cxgb4_free_stid(cdev->lldi.tids, stid,
368 ss_family);
369 cxgbit_np_hash_del(cdev, cnp);
370 return ret;
371 }
372 return ret;
373 }
374
cxgbit_setup_cdev_np(struct cxgbit_np * cnp)375 static int cxgbit_setup_cdev_np(struct cxgbit_np *cnp)
376 {
377 struct cxgbit_device *cdev;
378 int ret = -1;
379
380 mutex_lock(&cdev_list_lock);
381 cdev = cxgbit_find_np_cdev(cnp);
382 if (!cdev)
383 goto out;
384
385 if (cxgbit_np_hash_find(cdev, cnp) >= 0)
386 goto out;
387
388 if (__cxgbit_setup_cdev_np(cdev, cnp))
389 goto out;
390
391 cnp->com.cdev = cdev;
392 ret = 0;
393 out:
394 mutex_unlock(&cdev_list_lock);
395 return ret;
396 }
397
cxgbit_setup_all_np(struct cxgbit_np * cnp)398 static int cxgbit_setup_all_np(struct cxgbit_np *cnp)
399 {
400 struct cxgbit_device *cdev;
401 int ret;
402 u32 count = 0;
403
404 mutex_lock(&cdev_list_lock);
405 list_for_each_entry(cdev, &cdev_list_head, list) {
406 if (cxgbit_np_hash_find(cdev, cnp) >= 0) {
407 mutex_unlock(&cdev_list_lock);
408 return -1;
409 }
410 }
411
412 list_for_each_entry(cdev, &cdev_list_head, list) {
413 ret = __cxgbit_setup_cdev_np(cdev, cnp);
414 if (ret == -ETIMEDOUT)
415 break;
416 if (ret != 0)
417 continue;
418 count++;
419 }
420 mutex_unlock(&cdev_list_lock);
421
422 return count ? 0 : -1;
423 }
424
cxgbit_setup_np(struct iscsi_np * np,struct sockaddr_storage * ksockaddr)425 int cxgbit_setup_np(struct iscsi_np *np, struct sockaddr_storage *ksockaddr)
426 {
427 struct cxgbit_np *cnp;
428 int ret;
429
430 if ((ksockaddr->ss_family != AF_INET) &&
431 (ksockaddr->ss_family != AF_INET6))
432 return -EINVAL;
433
434 cnp = kzalloc(sizeof(*cnp), GFP_KERNEL);
435 if (!cnp)
436 return -ENOMEM;
437
438 init_waitqueue_head(&cnp->accept_wait);
439 init_completion(&cnp->com.wr_wait.completion);
440 init_completion(&cnp->accept_comp);
441 INIT_LIST_HEAD(&cnp->np_accept_list);
442 spin_lock_init(&cnp->np_accept_lock);
443 kref_init(&cnp->kref);
444 memcpy(&np->np_sockaddr, ksockaddr,
445 sizeof(struct sockaddr_storage));
446 memcpy(&cnp->com.local_addr, &np->np_sockaddr,
447 sizeof(cnp->com.local_addr));
448
449 cnp->np = np;
450 cnp->com.cdev = NULL;
451
452 if (cxgbit_inaddr_any(cnp))
453 ret = cxgbit_setup_all_np(cnp);
454 else
455 ret = cxgbit_setup_cdev_np(cnp);
456
457 if (ret) {
458 cxgbit_put_cnp(cnp);
459 return -EINVAL;
460 }
461
462 np->np_context = cnp;
463 cnp->com.state = CSK_STATE_LISTEN;
464 return 0;
465 }
466
467 static void
cxgbit_set_conn_info(struct iscsi_np * np,struct iscsit_conn * conn,struct cxgbit_sock * csk)468 cxgbit_set_conn_info(struct iscsi_np *np, struct iscsit_conn *conn,
469 struct cxgbit_sock *csk)
470 {
471 conn->login_family = np->np_sockaddr.ss_family;
472 conn->login_sockaddr = csk->com.remote_addr;
473 conn->local_sockaddr = csk->com.local_addr;
474 }
475
cxgbit_accept_np(struct iscsi_np * np,struct iscsit_conn * conn)476 int cxgbit_accept_np(struct iscsi_np *np, struct iscsit_conn *conn)
477 {
478 struct cxgbit_np *cnp = np->np_context;
479 struct cxgbit_sock *csk;
480 int ret = 0;
481
482 accept_wait:
483 ret = wait_for_completion_interruptible(&cnp->accept_comp);
484 if (ret)
485 return -ENODEV;
486
487 spin_lock_bh(&np->np_thread_lock);
488 if (np->np_thread_state >= ISCSI_NP_THREAD_RESET) {
489 spin_unlock_bh(&np->np_thread_lock);
490 /**
491 * No point in stalling here when np_thread
492 * is in state RESET/SHUTDOWN/EXIT - bail
493 **/
494 return -ENODEV;
495 }
496 spin_unlock_bh(&np->np_thread_lock);
497
498 spin_lock_bh(&cnp->np_accept_lock);
499 if (list_empty(&cnp->np_accept_list)) {
500 spin_unlock_bh(&cnp->np_accept_lock);
501 goto accept_wait;
502 }
503
504 csk = list_first_entry(&cnp->np_accept_list,
505 struct cxgbit_sock,
506 accept_node);
507
508 list_del_init(&csk->accept_node);
509 spin_unlock_bh(&cnp->np_accept_lock);
510 conn->context = csk;
511 csk->conn = conn;
512
513 cxgbit_set_conn_info(np, conn, csk);
514 return 0;
515 }
516
517 static int
__cxgbit_free_cdev_np(struct cxgbit_device * cdev,struct cxgbit_np * cnp)518 __cxgbit_free_cdev_np(struct cxgbit_device *cdev, struct cxgbit_np *cnp)
519 {
520 int stid, ret;
521 bool ipv6 = false;
522
523 stid = cxgbit_np_hash_del(cdev, cnp);
524 if (stid < 0)
525 return -EINVAL;
526 if (!test_bit(CDEV_STATE_UP, &cdev->flags))
527 return -EINVAL;
528
529 if (cnp->np->np_sockaddr.ss_family == AF_INET6)
530 ipv6 = true;
531
532 cxgbit_get_cnp(cnp);
533 cxgbit_init_wr_wait(&cnp->com.wr_wait);
534 ret = cxgb4_remove_server(cdev->lldi.ports[0], stid,
535 cdev->lldi.rxq_ids[0], ipv6);
536
537 if (ret > 0)
538 ret = net_xmit_errno(ret);
539
540 if (ret) {
541 cxgbit_put_cnp(cnp);
542 return ret;
543 }
544
545 ret = cxgbit_wait_for_reply(cdev, &cnp->com.wr_wait,
546 0, 10, __func__);
547 if (ret == -ETIMEDOUT)
548 return ret;
549
550 if (ipv6 && cnp->com.cdev) {
551 struct sockaddr_in6 *sin6;
552
553 sin6 = (struct sockaddr_in6 *)&cnp->com.local_addr;
554 cxgb4_clip_release(cdev->lldi.ports[0],
555 (const u32 *)&sin6->sin6_addr.s6_addr,
556 1);
557 }
558
559 cxgb4_free_stid(cdev->lldi.tids, stid,
560 cnp->com.local_addr.ss_family);
561 return 0;
562 }
563
cxgbit_free_all_np(struct cxgbit_np * cnp)564 static void cxgbit_free_all_np(struct cxgbit_np *cnp)
565 {
566 struct cxgbit_device *cdev;
567 int ret;
568
569 mutex_lock(&cdev_list_lock);
570 list_for_each_entry(cdev, &cdev_list_head, list) {
571 ret = __cxgbit_free_cdev_np(cdev, cnp);
572 if (ret == -ETIMEDOUT)
573 break;
574 }
575 mutex_unlock(&cdev_list_lock);
576 }
577
cxgbit_free_cdev_np(struct cxgbit_np * cnp)578 static void cxgbit_free_cdev_np(struct cxgbit_np *cnp)
579 {
580 struct cxgbit_device *cdev;
581 bool found = false;
582
583 mutex_lock(&cdev_list_lock);
584 list_for_each_entry(cdev, &cdev_list_head, list) {
585 if (cdev == cnp->com.cdev) {
586 found = true;
587 break;
588 }
589 }
590 if (!found)
591 goto out;
592
593 __cxgbit_free_cdev_np(cdev, cnp);
594 out:
595 mutex_unlock(&cdev_list_lock);
596 }
597
598 static void __cxgbit_free_conn(struct cxgbit_sock *csk);
599
cxgbit_free_np(struct iscsi_np * np)600 void cxgbit_free_np(struct iscsi_np *np)
601 {
602 struct cxgbit_np *cnp = np->np_context;
603 struct cxgbit_sock *csk, *tmp;
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 spin_lock_bh(&cnp->np_accept_lock);
612 list_for_each_entry_safe(csk, tmp, &cnp->np_accept_list, accept_node) {
613 list_del_init(&csk->accept_node);
614 __cxgbit_free_conn(csk);
615 }
616 spin_unlock_bh(&cnp->np_accept_lock);
617
618 np->np_context = NULL;
619 cxgbit_put_cnp(cnp);
620 }
621
cxgbit_send_halfclose(struct cxgbit_sock * csk)622 static void cxgbit_send_halfclose(struct cxgbit_sock *csk)
623 {
624 struct sk_buff *skb;
625 u32 len = roundup(sizeof(struct cpl_close_con_req), 16);
626
627 skb = alloc_skb(len, GFP_ATOMIC);
628 if (!skb)
629 return;
630
631 cxgb_mk_close_con_req(skb, len, csk->tid, csk->txq_idx,
632 NULL, NULL);
633
634 cxgbit_skcb_flags(skb) |= SKCBF_TX_FLAG_COMPL;
635 __skb_queue_tail(&csk->txq, skb);
636 cxgbit_push_tx_frames(csk);
637 }
638
cxgbit_arp_failure_discard(void * handle,struct sk_buff * skb)639 static void cxgbit_arp_failure_discard(void *handle, struct sk_buff *skb)
640 {
641 struct cxgbit_sock *csk = handle;
642
643 pr_debug("%s cxgbit_device %p\n", __func__, handle);
644 kfree_skb(skb);
645 cxgbit_put_csk(csk);
646 }
647
cxgbit_abort_arp_failure(void * handle,struct sk_buff * skb)648 static void cxgbit_abort_arp_failure(void *handle, struct sk_buff *skb)
649 {
650 struct cxgbit_device *cdev = handle;
651 struct cpl_abort_req *req = cplhdr(skb);
652
653 pr_debug("%s cdev %p\n", __func__, cdev);
654 req->cmd = CPL_ABORT_NO_RST;
655 cxgbit_ofld_send(cdev, skb);
656 }
657
cxgbit_send_abort_req(struct cxgbit_sock * csk)658 static int cxgbit_send_abort_req(struct cxgbit_sock *csk)
659 {
660 struct sk_buff *skb;
661 u32 len = roundup(sizeof(struct cpl_abort_req), 16);
662
663 pr_debug("%s: csk %p tid %u; state %d\n",
664 __func__, csk, csk->tid, csk->com.state);
665
666 __skb_queue_purge(&csk->txq);
667
668 if (!test_and_set_bit(CSK_TX_DATA_SENT, &csk->com.flags))
669 cxgbit_send_tx_flowc_wr(csk);
670
671 skb = __skb_dequeue(&csk->skbq);
672 cxgb_mk_abort_req(skb, len, csk->tid, csk->txq_idx,
673 csk->com.cdev, cxgbit_abort_arp_failure);
674
675 return cxgbit_l2t_send(csk->com.cdev, skb, csk->l2t);
676 }
677
678 static void
__cxgbit_abort_conn(struct cxgbit_sock * csk,struct sk_buff * skb)679 __cxgbit_abort_conn(struct cxgbit_sock *csk, struct sk_buff *skb)
680 {
681 __kfree_skb(skb);
682
683 if (csk->com.state != CSK_STATE_ESTABLISHED)
684 goto no_abort;
685
686 set_bit(CSK_ABORT_RPL_WAIT, &csk->com.flags);
687 csk->com.state = CSK_STATE_ABORTING;
688
689 cxgbit_send_abort_req(csk);
690
691 return;
692
693 no_abort:
694 cxgbit_wake_up(&csk->com.wr_wait, __func__, CPL_ERR_NONE);
695 cxgbit_put_csk(csk);
696 }
697
cxgbit_abort_conn(struct cxgbit_sock * csk)698 void cxgbit_abort_conn(struct cxgbit_sock *csk)
699 {
700 struct sk_buff *skb = alloc_skb(0, GFP_KERNEL | __GFP_NOFAIL);
701
702 cxgbit_get_csk(csk);
703 cxgbit_init_wr_wait(&csk->com.wr_wait);
704
705 spin_lock_bh(&csk->lock);
706 if (csk->lock_owner) {
707 cxgbit_skcb_rx_backlog_fn(skb) = __cxgbit_abort_conn;
708 __skb_queue_tail(&csk->backlogq, skb);
709 } else {
710 __cxgbit_abort_conn(csk, skb);
711 }
712 spin_unlock_bh(&csk->lock);
713
714 cxgbit_wait_for_reply(csk->com.cdev, &csk->com.wr_wait,
715 csk->tid, 600, __func__);
716 }
717
__cxgbit_free_conn(struct cxgbit_sock * csk)718 static void __cxgbit_free_conn(struct cxgbit_sock *csk)
719 {
720 struct iscsit_conn *conn = csk->conn;
721 bool release = false;
722
723 pr_debug("%s: state %d\n",
724 __func__, csk->com.state);
725
726 spin_lock_bh(&csk->lock);
727 switch (csk->com.state) {
728 case CSK_STATE_ESTABLISHED:
729 if (conn && (conn->conn_state == TARG_CONN_STATE_IN_LOGOUT)) {
730 csk->com.state = CSK_STATE_CLOSING;
731 cxgbit_send_halfclose(csk);
732 } else {
733 csk->com.state = CSK_STATE_ABORTING;
734 cxgbit_send_abort_req(csk);
735 }
736 break;
737 case CSK_STATE_CLOSING:
738 csk->com.state = CSK_STATE_MORIBUND;
739 cxgbit_send_halfclose(csk);
740 break;
741 case CSK_STATE_DEAD:
742 release = true;
743 break;
744 default:
745 pr_err("%s: csk %p; state %d\n",
746 __func__, csk, csk->com.state);
747 }
748 spin_unlock_bh(&csk->lock);
749
750 if (release)
751 cxgbit_put_csk(csk);
752 }
753
cxgbit_free_conn(struct iscsit_conn * conn)754 void cxgbit_free_conn(struct iscsit_conn *conn)
755 {
756 __cxgbit_free_conn(conn->context);
757 }
758
cxgbit_set_emss(struct cxgbit_sock * csk,u16 opt)759 static void cxgbit_set_emss(struct cxgbit_sock *csk, u16 opt)
760 {
761 csk->emss = csk->com.cdev->lldi.mtus[TCPOPT_MSS_G(opt)] -
762 ((csk->com.remote_addr.ss_family == AF_INET) ?
763 sizeof(struct iphdr) : sizeof(struct ipv6hdr)) -
764 sizeof(struct tcphdr);
765 csk->mss = csk->emss;
766 if (TCPOPT_TSTAMP_G(opt))
767 csk->emss -= round_up(TCPOLEN_TIMESTAMP, 4);
768 if (csk->emss < 128)
769 csk->emss = 128;
770 if (csk->emss & 7)
771 pr_info("Warning: misaligned mtu idx %u mss %u emss=%u\n",
772 TCPOPT_MSS_G(opt), csk->mss, csk->emss);
773 pr_debug("%s mss_idx %u mss %u emss=%u\n", __func__, TCPOPT_MSS_G(opt),
774 csk->mss, csk->emss);
775 }
776
cxgbit_free_skb(struct cxgbit_sock * csk)777 static void cxgbit_free_skb(struct cxgbit_sock *csk)
778 {
779 struct sk_buff *skb;
780
781 __skb_queue_purge(&csk->txq);
782 __skb_queue_purge(&csk->rxq);
783 __skb_queue_purge(&csk->backlogq);
784 __skb_queue_purge(&csk->ppodq);
785 __skb_queue_purge(&csk->skbq);
786
787 while ((skb = cxgbit_sock_dequeue_wr(csk)))
788 kfree_skb(skb);
789
790 __kfree_skb(csk->lro_hskb);
791 }
792
_cxgbit_free_csk(struct kref * kref)793 void _cxgbit_free_csk(struct kref *kref)
794 {
795 struct cxgbit_sock *csk;
796 struct cxgbit_device *cdev;
797
798 csk = container_of(kref, struct cxgbit_sock, kref);
799
800 pr_debug("%s csk %p state %d\n", __func__, csk, csk->com.state);
801
802 if (csk->com.local_addr.ss_family == AF_INET6) {
803 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)
804 &csk->com.local_addr;
805 cxgb4_clip_release(csk->com.cdev->lldi.ports[0],
806 (const u32 *)
807 &sin6->sin6_addr.s6_addr, 1);
808 }
809
810 cxgb4_remove_tid(csk->com.cdev->lldi.tids, 0, csk->tid,
811 csk->com.local_addr.ss_family);
812 dst_release(csk->dst);
813 cxgb4_l2t_release(csk->l2t);
814
815 cdev = csk->com.cdev;
816 spin_lock_bh(&cdev->cskq.lock);
817 list_del(&csk->list);
818 spin_unlock_bh(&cdev->cskq.lock);
819
820 cxgbit_free_skb(csk);
821 cxgbit_put_cnp(csk->cnp);
822 cxgbit_put_cdev(cdev);
823
824 kfree(csk);
825 }
826
cxgbit_set_tcp_window(struct cxgbit_sock * csk,struct port_info * pi)827 static void cxgbit_set_tcp_window(struct cxgbit_sock *csk, struct port_info *pi)
828 {
829 unsigned int linkspeed;
830 u8 scale;
831
832 linkspeed = pi->link_cfg.speed;
833 scale = linkspeed / SPEED_10000;
834
835 #define CXGBIT_10G_RCV_WIN (256 * 1024)
836 csk->rcv_win = CXGBIT_10G_RCV_WIN;
837 if (scale)
838 csk->rcv_win *= scale;
839 csk->rcv_win = min(csk->rcv_win, RCV_BUFSIZ_M << 10);
840
841 #define CXGBIT_10G_SND_WIN (256 * 1024)
842 csk->snd_win = CXGBIT_10G_SND_WIN;
843 if (scale)
844 csk->snd_win *= scale;
845 csk->snd_win = min(csk->snd_win, 512U * 1024);
846
847 pr_debug("%s snd_win %d rcv_win %d\n",
848 __func__, csk->snd_win, csk->rcv_win);
849 }
850
851 #ifdef CONFIG_CHELSIO_T4_DCB
cxgbit_get_iscsi_dcb_state(struct net_device * ndev)852 static u8 cxgbit_get_iscsi_dcb_state(struct net_device *ndev)
853 {
854 return ndev->dcbnl_ops->getstate(ndev);
855 }
856
cxgbit_select_priority(int pri_mask)857 static int cxgbit_select_priority(int pri_mask)
858 {
859 if (!pri_mask)
860 return 0;
861
862 return (ffs(pri_mask) - 1);
863 }
864
cxgbit_get_iscsi_dcb_priority(struct net_device * ndev,u16 local_port)865 static u8 cxgbit_get_iscsi_dcb_priority(struct net_device *ndev, u16 local_port)
866 {
867 int ret;
868 u8 caps;
869
870 struct dcb_app iscsi_dcb_app = {
871 .protocol = local_port
872 };
873
874 ret = (int)ndev->dcbnl_ops->getcap(ndev, DCB_CAP_ATTR_DCBX, &caps);
875
876 if (ret)
877 return 0;
878
879 if (caps & DCB_CAP_DCBX_VER_IEEE) {
880 iscsi_dcb_app.selector = IEEE_8021QAZ_APP_SEL_STREAM;
881 ret = dcb_ieee_getapp_mask(ndev, &iscsi_dcb_app);
882 if (!ret) {
883 iscsi_dcb_app.selector = IEEE_8021QAZ_APP_SEL_ANY;
884 ret = dcb_ieee_getapp_mask(ndev, &iscsi_dcb_app);
885 }
886 } else if (caps & DCB_CAP_DCBX_VER_CEE) {
887 iscsi_dcb_app.selector = DCB_APP_IDTYPE_PORTNUM;
888
889 ret = dcb_getapp(ndev, &iscsi_dcb_app);
890 }
891
892 pr_info("iSCSI priority is set to %u\n", cxgbit_select_priority(ret));
893
894 return cxgbit_select_priority(ret);
895 }
896 #endif
897
898 static int
cxgbit_offload_init(struct cxgbit_sock * csk,int iptype,__u8 * peer_ip,u16 local_port,struct dst_entry * dst,struct cxgbit_device * cdev)899 cxgbit_offload_init(struct cxgbit_sock *csk, int iptype, __u8 *peer_ip,
900 u16 local_port, struct dst_entry *dst,
901 struct cxgbit_device *cdev)
902 {
903 struct neighbour *n;
904 int ret, step;
905 struct net_device *ndev;
906 u16 rxq_idx, port_id;
907 #ifdef CONFIG_CHELSIO_T4_DCB
908 u8 priority = 0;
909 #endif
910
911 n = dst_neigh_lookup(dst, peer_ip);
912 if (!n)
913 return -ENODEV;
914
915 rcu_read_lock();
916 if (!(n->nud_state & NUD_VALID))
917 neigh_event_send(n, NULL);
918
919 ret = -ENOMEM;
920 if (n->dev->flags & IFF_LOOPBACK) {
921 if (iptype == 4)
922 ndev = cxgbit_ipv4_netdev(*(__be32 *)peer_ip);
923 else if (IS_ENABLED(CONFIG_IPV6))
924 ndev = cxgbit_ipv6_netdev((struct in6_addr *)peer_ip);
925 else
926 ndev = NULL;
927
928 if (!ndev) {
929 ret = -ENODEV;
930 goto out;
931 }
932
933 csk->l2t = cxgb4_l2t_get(cdev->lldi.l2t,
934 n, ndev, 0);
935 if (!csk->l2t)
936 goto out;
937 csk->mtu = ndev->mtu;
938 csk->tx_chan = cxgb4_port_chan(ndev);
939 csk->smac_idx =
940 ((struct port_info *)netdev_priv(ndev))->smt_idx;
941 step = cdev->lldi.ntxq /
942 cdev->lldi.nchan;
943 csk->txq_idx = cxgb4_port_idx(ndev) * step;
944 step = cdev->lldi.nrxq /
945 cdev->lldi.nchan;
946 csk->ctrlq_idx = cxgb4_port_idx(ndev);
947 csk->rss_qid = cdev->lldi.rxq_ids[
948 cxgb4_port_idx(ndev) * step];
949 csk->port_id = cxgb4_port_idx(ndev);
950 cxgbit_set_tcp_window(csk,
951 (struct port_info *)netdev_priv(ndev));
952 } else {
953 ndev = cxgbit_get_real_dev(n->dev);
954 if (!ndev) {
955 ret = -ENODEV;
956 goto out;
957 }
958
959 #ifdef CONFIG_CHELSIO_T4_DCB
960 if (cxgbit_get_iscsi_dcb_state(ndev))
961 priority = cxgbit_get_iscsi_dcb_priority(ndev,
962 local_port);
963
964 csk->dcb_priority = priority;
965
966 csk->l2t = cxgb4_l2t_get(cdev->lldi.l2t, n, ndev, priority);
967 #else
968 csk->l2t = cxgb4_l2t_get(cdev->lldi.l2t, n, ndev, 0);
969 #endif
970 if (!csk->l2t)
971 goto out;
972 port_id = cxgb4_port_idx(ndev);
973 csk->mtu = dst_mtu(dst);
974 csk->tx_chan = cxgb4_port_chan(ndev);
975 csk->smac_idx =
976 ((struct port_info *)netdev_priv(ndev))->smt_idx;
977 step = cdev->lldi.ntxq /
978 cdev->lldi.nports;
979 csk->txq_idx = (port_id * step) +
980 (cdev->selectq[port_id][0]++ % step);
981 csk->ctrlq_idx = cxgb4_port_idx(ndev);
982 step = cdev->lldi.nrxq /
983 cdev->lldi.nports;
984 rxq_idx = (port_id * step) +
985 (cdev->selectq[port_id][1]++ % step);
986 csk->rss_qid = cdev->lldi.rxq_ids[rxq_idx];
987 csk->port_id = port_id;
988 cxgbit_set_tcp_window(csk,
989 (struct port_info *)netdev_priv(ndev));
990 }
991 ret = 0;
992 out:
993 rcu_read_unlock();
994 neigh_release(n);
995 return ret;
996 }
997
cxgbit_ofld_send(struct cxgbit_device * cdev,struct sk_buff * skb)998 int cxgbit_ofld_send(struct cxgbit_device *cdev, struct sk_buff *skb)
999 {
1000 int ret = 0;
1001
1002 if (!test_bit(CDEV_STATE_UP, &cdev->flags)) {
1003 kfree_skb(skb);
1004 pr_err("%s - device not up - dropping\n", __func__);
1005 return -EIO;
1006 }
1007
1008 ret = cxgb4_ofld_send(cdev->lldi.ports[0], skb);
1009 if (ret < 0)
1010 kfree_skb(skb);
1011 return ret < 0 ? ret : 0;
1012 }
1013
cxgbit_release_tid(struct cxgbit_device * cdev,u32 tid)1014 static void cxgbit_release_tid(struct cxgbit_device *cdev, u32 tid)
1015 {
1016 u32 len = roundup(sizeof(struct cpl_tid_release), 16);
1017 struct sk_buff *skb;
1018
1019 skb = alloc_skb(len, GFP_ATOMIC);
1020 if (!skb)
1021 return;
1022
1023 cxgb_mk_tid_release(skb, len, tid, 0);
1024 cxgbit_ofld_send(cdev, skb);
1025 }
1026
1027 int
cxgbit_l2t_send(struct cxgbit_device * cdev,struct sk_buff * skb,struct l2t_entry * l2e)1028 cxgbit_l2t_send(struct cxgbit_device *cdev, struct sk_buff *skb,
1029 struct l2t_entry *l2e)
1030 {
1031 int ret = 0;
1032
1033 if (!test_bit(CDEV_STATE_UP, &cdev->flags)) {
1034 kfree_skb(skb);
1035 pr_err("%s - device not up - dropping\n", __func__);
1036 return -EIO;
1037 }
1038
1039 ret = cxgb4_l2t_send(cdev->lldi.ports[0], skb, l2e);
1040 if (ret < 0)
1041 kfree_skb(skb);
1042 return ret < 0 ? ret : 0;
1043 }
1044
cxgbit_send_rx_credits(struct cxgbit_sock * csk,struct sk_buff * skb)1045 static void cxgbit_send_rx_credits(struct cxgbit_sock *csk, struct sk_buff *skb)
1046 {
1047 if (csk->com.state != CSK_STATE_ESTABLISHED) {
1048 __kfree_skb(skb);
1049 return;
1050 }
1051
1052 cxgbit_ofld_send(csk->com.cdev, skb);
1053 }
1054
1055 /*
1056 * CPL connection rx data ack: host ->
1057 * Send RX credits through an RX_DATA_ACK CPL message.
1058 * Returns the number of credits sent.
1059 */
cxgbit_rx_data_ack(struct cxgbit_sock * csk)1060 int cxgbit_rx_data_ack(struct cxgbit_sock *csk)
1061 {
1062 struct sk_buff *skb;
1063 u32 len = roundup(sizeof(struct cpl_rx_data_ack), 16);
1064 u32 credit_dack;
1065
1066 skb = alloc_skb(len, GFP_KERNEL);
1067 if (!skb)
1068 return -1;
1069
1070 credit_dack = RX_DACK_CHANGE_F | RX_DACK_MODE_V(3) |
1071 RX_CREDITS_V(csk->rx_credits);
1072
1073 cxgb_mk_rx_data_ack(skb, len, csk->tid, csk->ctrlq_idx,
1074 credit_dack);
1075
1076 csk->rx_credits = 0;
1077
1078 spin_lock_bh(&csk->lock);
1079 if (csk->lock_owner) {
1080 cxgbit_skcb_rx_backlog_fn(skb) = cxgbit_send_rx_credits;
1081 __skb_queue_tail(&csk->backlogq, skb);
1082 spin_unlock_bh(&csk->lock);
1083 return 0;
1084 }
1085
1086 cxgbit_send_rx_credits(csk, skb);
1087 spin_unlock_bh(&csk->lock);
1088
1089 return 0;
1090 }
1091
1092 #define FLOWC_WR_NPARAMS_MIN 9
1093 #define FLOWC_WR_NPARAMS_MAX 11
cxgbit_alloc_csk_skb(struct cxgbit_sock * csk)1094 static int cxgbit_alloc_csk_skb(struct cxgbit_sock *csk)
1095 {
1096 struct sk_buff *skb;
1097 u32 len, flowclen;
1098 u8 i;
1099
1100 flowclen = offsetof(struct fw_flowc_wr,
1101 mnemval[FLOWC_WR_NPARAMS_MAX]);
1102
1103 len = max_t(u32, sizeof(struct cpl_abort_req),
1104 sizeof(struct cpl_abort_rpl));
1105
1106 len = max(len, flowclen);
1107 len = roundup(len, 16);
1108
1109 for (i = 0; i < 3; i++) {
1110 skb = alloc_skb(len, GFP_ATOMIC);
1111 if (!skb)
1112 goto out;
1113 __skb_queue_tail(&csk->skbq, skb);
1114 }
1115
1116 skb = alloc_skb(LRO_SKB_MIN_HEADROOM, GFP_ATOMIC);
1117 if (!skb)
1118 goto out;
1119
1120 memset(skb->data, 0, LRO_SKB_MIN_HEADROOM);
1121 csk->lro_hskb = skb;
1122
1123 return 0;
1124 out:
1125 __skb_queue_purge(&csk->skbq);
1126 return -ENOMEM;
1127 }
1128
1129 static void
cxgbit_pass_accept_rpl(struct cxgbit_sock * csk,struct cpl_pass_accept_req * req)1130 cxgbit_pass_accept_rpl(struct cxgbit_sock *csk, struct cpl_pass_accept_req *req)
1131 {
1132 struct sk_buff *skb;
1133 const struct tcphdr *tcph;
1134 struct cpl_t5_pass_accept_rpl *rpl5;
1135 struct cxgb4_lld_info *lldi = &csk->com.cdev->lldi;
1136 unsigned int len = roundup(sizeof(*rpl5), 16);
1137 unsigned int mtu_idx;
1138 u64 opt0;
1139 u32 opt2, hlen;
1140 u32 wscale;
1141 u32 win;
1142
1143 pr_debug("%s csk %p tid %u\n", __func__, csk, csk->tid);
1144
1145 skb = alloc_skb(len, GFP_ATOMIC);
1146 if (!skb) {
1147 cxgbit_put_csk(csk);
1148 return;
1149 }
1150
1151 rpl5 = __skb_put_zero(skb, len);
1152
1153 INIT_TP_WR(rpl5, csk->tid);
1154 OPCODE_TID(rpl5) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
1155 csk->tid));
1156 cxgb_best_mtu(csk->com.cdev->lldi.mtus, csk->mtu, &mtu_idx,
1157 req->tcpopt.tstamp,
1158 (csk->com.remote_addr.ss_family == AF_INET) ? 0 : 1);
1159 wscale = cxgb_compute_wscale(csk->rcv_win);
1160 /*
1161 * Specify the largest window that will fit in opt0. The
1162 * remainder will be specified in the rx_data_ack.
1163 */
1164 win = csk->rcv_win >> 10;
1165 if (win > RCV_BUFSIZ_M)
1166 win = RCV_BUFSIZ_M;
1167 opt0 = TCAM_BYPASS_F |
1168 WND_SCALE_V(wscale) |
1169 MSS_IDX_V(mtu_idx) |
1170 L2T_IDX_V(csk->l2t->idx) |
1171 TX_CHAN_V(csk->tx_chan) |
1172 SMAC_SEL_V(csk->smac_idx) |
1173 DSCP_V(csk->tos >> 2) |
1174 ULP_MODE_V(ULP_MODE_ISCSI) |
1175 RCV_BUFSIZ_V(win);
1176
1177 opt2 = RX_CHANNEL_V(0) |
1178 RSS_QUEUE_VALID_F | RSS_QUEUE_V(csk->rss_qid);
1179
1180 if (!is_t5(lldi->adapter_type))
1181 opt2 |= RX_FC_DISABLE_F;
1182
1183 if (req->tcpopt.tstamp)
1184 opt2 |= TSTAMPS_EN_F;
1185 if (req->tcpopt.sack)
1186 opt2 |= SACK_EN_F;
1187 if (wscale)
1188 opt2 |= WND_SCALE_EN_F;
1189
1190 hlen = ntohl(req->hdr_len);
1191
1192 if (is_t5(lldi->adapter_type))
1193 tcph = (struct tcphdr *)((u8 *)(req + 1) +
1194 ETH_HDR_LEN_G(hlen) + IP_HDR_LEN_G(hlen));
1195 else
1196 tcph = (struct tcphdr *)((u8 *)(req + 1) +
1197 T6_ETH_HDR_LEN_G(hlen) + T6_IP_HDR_LEN_G(hlen));
1198
1199 if (tcph->ece && tcph->cwr)
1200 opt2 |= CCTRL_ECN_V(1);
1201
1202 opt2 |= CONG_CNTRL_V(CONG_ALG_NEWRENO);
1203
1204 opt2 |= T5_ISS_F;
1205 rpl5->iss = cpu_to_be32((get_random_u32() & ~7UL) - 1);
1206
1207 opt2 |= T5_OPT_2_VALID_F;
1208
1209 rpl5->opt0 = cpu_to_be64(opt0);
1210 rpl5->opt2 = cpu_to_be32(opt2);
1211 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->ctrlq_idx);
1212 t4_set_arp_err_handler(skb, csk, cxgbit_arp_failure_discard);
1213 cxgbit_l2t_send(csk->com.cdev, skb, csk->l2t);
1214 }
1215
1216 static void
cxgbit_pass_accept_req(struct cxgbit_device * cdev,struct sk_buff * skb)1217 cxgbit_pass_accept_req(struct cxgbit_device *cdev, struct sk_buff *skb)
1218 {
1219 struct cxgbit_sock *csk = NULL;
1220 struct cxgbit_np *cnp;
1221 struct cpl_pass_accept_req *req = cplhdr(skb);
1222 unsigned int stid = PASS_OPEN_TID_G(ntohl(req->tos_stid));
1223 struct tid_info *t = cdev->lldi.tids;
1224 unsigned int tid = GET_TID(req);
1225 u16 peer_mss = ntohs(req->tcpopt.mss);
1226 unsigned short hdrs;
1227
1228 struct dst_entry *dst;
1229 __u8 local_ip[16], peer_ip[16];
1230 __be16 local_port, peer_port;
1231 int ret;
1232 int iptype;
1233
1234 pr_debug("%s: cdev = %p; stid = %u; tid = %u\n",
1235 __func__, cdev, stid, tid);
1236
1237 cnp = lookup_stid(t, stid);
1238 if (!cnp) {
1239 pr_err("%s connect request on invalid stid %d\n",
1240 __func__, stid);
1241 goto rel_skb;
1242 }
1243
1244 if (cnp->com.state != CSK_STATE_LISTEN) {
1245 pr_err("%s - listening parent not in CSK_STATE_LISTEN\n",
1246 __func__);
1247 goto reject;
1248 }
1249
1250 csk = lookup_tid(t, tid);
1251 if (csk) {
1252 pr_err("%s csk not null tid %u\n",
1253 __func__, tid);
1254 goto rel_skb;
1255 }
1256
1257 cxgb_get_4tuple(req, cdev->lldi.adapter_type, &iptype, local_ip,
1258 peer_ip, &local_port, &peer_port);
1259
1260 /* Find output route */
1261 if (iptype == 4) {
1262 pr_debug("%s parent sock %p tid %u laddr %pI4 raddr %pI4 "
1263 "lport %d rport %d peer_mss %d\n"
1264 , __func__, cnp, tid,
1265 local_ip, peer_ip, ntohs(local_port),
1266 ntohs(peer_port), peer_mss);
1267 dst = cxgb_find_route(&cdev->lldi, cxgbit_get_real_dev,
1268 *(__be32 *)local_ip,
1269 *(__be32 *)peer_ip,
1270 local_port, peer_port,
1271 PASS_OPEN_TOS_G(ntohl(req->tos_stid)));
1272 } else {
1273 pr_debug("%s parent sock %p tid %u laddr %pI6 raddr %pI6 "
1274 "lport %d rport %d peer_mss %d\n"
1275 , __func__, cnp, tid,
1276 local_ip, peer_ip, ntohs(local_port),
1277 ntohs(peer_port), peer_mss);
1278 dst = cxgb_find_route6(&cdev->lldi, cxgbit_get_real_dev,
1279 local_ip, peer_ip,
1280 local_port, peer_port,
1281 PASS_OPEN_TOS_G(ntohl(req->tos_stid)),
1282 ((struct sockaddr_in6 *)
1283 &cnp->com.local_addr)->sin6_scope_id);
1284 }
1285 if (!dst) {
1286 pr_err("%s - failed to find dst entry!\n",
1287 __func__);
1288 goto reject;
1289 }
1290
1291 csk = kzalloc(sizeof(*csk), GFP_ATOMIC);
1292 if (!csk) {
1293 dst_release(dst);
1294 goto rel_skb;
1295 }
1296
1297 ret = cxgbit_offload_init(csk, iptype, peer_ip, ntohs(local_port),
1298 dst, cdev);
1299 if (ret) {
1300 pr_err("%s - failed to allocate l2t entry!\n",
1301 __func__);
1302 dst_release(dst);
1303 kfree(csk);
1304 goto reject;
1305 }
1306
1307 kref_init(&csk->kref);
1308 init_completion(&csk->com.wr_wait.completion);
1309
1310 INIT_LIST_HEAD(&csk->accept_node);
1311
1312 hdrs = (iptype == 4 ? sizeof(struct iphdr) : sizeof(struct ipv6hdr)) +
1313 sizeof(struct tcphdr) + (req->tcpopt.tstamp ? 12 : 0);
1314 if (peer_mss && csk->mtu > (peer_mss + hdrs))
1315 csk->mtu = peer_mss + hdrs;
1316
1317 csk->com.state = CSK_STATE_CONNECTING;
1318 csk->com.cdev = cdev;
1319 csk->cnp = cnp;
1320 csk->tos = PASS_OPEN_TOS_G(ntohl(req->tos_stid));
1321 csk->dst = dst;
1322 csk->tid = tid;
1323 csk->wr_cred = cdev->lldi.wr_cred -
1324 DIV_ROUND_UP(sizeof(struct cpl_abort_req), 16);
1325 csk->wr_max_cred = csk->wr_cred;
1326 csk->wr_una_cred = 0;
1327
1328 if (iptype == 4) {
1329 struct sockaddr_in *sin = (struct sockaddr_in *)
1330 &csk->com.local_addr;
1331 sin->sin_family = AF_INET;
1332 sin->sin_port = local_port;
1333 sin->sin_addr.s_addr = *(__be32 *)local_ip;
1334
1335 sin = (struct sockaddr_in *)&csk->com.remote_addr;
1336 sin->sin_family = AF_INET;
1337 sin->sin_port = peer_port;
1338 sin->sin_addr.s_addr = *(__be32 *)peer_ip;
1339 } else {
1340 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)
1341 &csk->com.local_addr;
1342
1343 sin6->sin6_family = PF_INET6;
1344 sin6->sin6_port = local_port;
1345 memcpy(sin6->sin6_addr.s6_addr, local_ip, 16);
1346 cxgb4_clip_get(cdev->lldi.ports[0],
1347 (const u32 *)&sin6->sin6_addr.s6_addr,
1348 1);
1349
1350 sin6 = (struct sockaddr_in6 *)&csk->com.remote_addr;
1351 sin6->sin6_family = PF_INET6;
1352 sin6->sin6_port = peer_port;
1353 memcpy(sin6->sin6_addr.s6_addr, peer_ip, 16);
1354 }
1355
1356 skb_queue_head_init(&csk->rxq);
1357 skb_queue_head_init(&csk->txq);
1358 skb_queue_head_init(&csk->ppodq);
1359 skb_queue_head_init(&csk->backlogq);
1360 skb_queue_head_init(&csk->skbq);
1361 cxgbit_sock_reset_wr_list(csk);
1362 spin_lock_init(&csk->lock);
1363 init_waitqueue_head(&csk->waitq);
1364 csk->lock_owner = false;
1365
1366 if (cxgbit_alloc_csk_skb(csk)) {
1367 dst_release(dst);
1368 kfree(csk);
1369 goto rel_skb;
1370 }
1371
1372 cxgbit_get_cnp(cnp);
1373 cxgbit_get_cdev(cdev);
1374
1375 spin_lock(&cdev->cskq.lock);
1376 list_add_tail(&csk->list, &cdev->cskq.list);
1377 spin_unlock(&cdev->cskq.lock);
1378 cxgb4_insert_tid(t, csk, tid, csk->com.local_addr.ss_family);
1379 cxgbit_pass_accept_rpl(csk, req);
1380 goto rel_skb;
1381
1382 reject:
1383 cxgbit_release_tid(cdev, tid);
1384 rel_skb:
1385 __kfree_skb(skb);
1386 }
1387
1388 static u32
cxgbit_tx_flowc_wr_credits(struct cxgbit_sock * csk,u32 * nparamsp,u32 * flowclenp)1389 cxgbit_tx_flowc_wr_credits(struct cxgbit_sock *csk, u32 *nparamsp,
1390 u32 *flowclenp)
1391 {
1392 u32 nparams, flowclen16, flowclen;
1393
1394 nparams = FLOWC_WR_NPARAMS_MIN;
1395
1396 if (csk->snd_wscale)
1397 nparams++;
1398
1399 #ifdef CONFIG_CHELSIO_T4_DCB
1400 nparams++;
1401 #endif
1402 flowclen = offsetof(struct fw_flowc_wr, mnemval[nparams]);
1403 flowclen16 = DIV_ROUND_UP(flowclen, 16);
1404 flowclen = flowclen16 * 16;
1405 /*
1406 * Return the number of 16-byte credits used by the flowc request.
1407 * Pass back the nparams and actual flowc length if requested.
1408 */
1409 if (nparamsp)
1410 *nparamsp = nparams;
1411 if (flowclenp)
1412 *flowclenp = flowclen;
1413 return flowclen16;
1414 }
1415
cxgbit_send_tx_flowc_wr(struct cxgbit_sock * csk)1416 u32 cxgbit_send_tx_flowc_wr(struct cxgbit_sock *csk)
1417 {
1418 struct cxgbit_device *cdev = csk->com.cdev;
1419 struct fw_flowc_wr *flowc;
1420 u32 nparams, flowclen16, flowclen;
1421 struct sk_buff *skb;
1422 u8 index;
1423
1424 #ifdef CONFIG_CHELSIO_T4_DCB
1425 u16 vlan = ((struct l2t_entry *)csk->l2t)->vlan;
1426 #endif
1427
1428 flowclen16 = cxgbit_tx_flowc_wr_credits(csk, &nparams, &flowclen);
1429
1430 skb = __skb_dequeue(&csk->skbq);
1431 flowc = __skb_put_zero(skb, flowclen);
1432
1433 flowc->op_to_nparams = cpu_to_be32(FW_WR_OP_V(FW_FLOWC_WR) |
1434 FW_FLOWC_WR_NPARAMS_V(nparams));
1435 flowc->flowid_len16 = cpu_to_be32(FW_WR_LEN16_V(flowclen16) |
1436 FW_WR_FLOWID_V(csk->tid));
1437 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
1438 flowc->mnemval[0].val = cpu_to_be32(FW_PFVF_CMD_PFN_V
1439 (csk->com.cdev->lldi.pf));
1440 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
1441 flowc->mnemval[1].val = cpu_to_be32(csk->tx_chan);
1442 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
1443 flowc->mnemval[2].val = cpu_to_be32(csk->tx_chan);
1444 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
1445 flowc->mnemval[3].val = cpu_to_be32(csk->rss_qid);
1446 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
1447 flowc->mnemval[4].val = cpu_to_be32(csk->snd_nxt);
1448 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
1449 flowc->mnemval[5].val = cpu_to_be32(csk->rcv_nxt);
1450 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
1451 flowc->mnemval[6].val = cpu_to_be32(csk->snd_win);
1452 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
1453 flowc->mnemval[7].val = cpu_to_be32(csk->emss);
1454
1455 flowc->mnemval[8].mnemonic = FW_FLOWC_MNEM_TXDATAPLEN_MAX;
1456 if (test_bit(CDEV_ISO_ENABLE, &cdev->flags))
1457 flowc->mnemval[8].val = cpu_to_be32(CXGBIT_MAX_ISO_PAYLOAD);
1458 else
1459 flowc->mnemval[8].val = cpu_to_be32(16384);
1460
1461 index = 9;
1462
1463 if (csk->snd_wscale) {
1464 flowc->mnemval[index].mnemonic = FW_FLOWC_MNEM_RCV_SCALE;
1465 flowc->mnemval[index].val = cpu_to_be32(csk->snd_wscale);
1466 index++;
1467 }
1468
1469 #ifdef CONFIG_CHELSIO_T4_DCB
1470 flowc->mnemval[index].mnemonic = FW_FLOWC_MNEM_DCBPRIO;
1471 if (vlan == VLAN_NONE) {
1472 pr_warn("csk %u without VLAN Tag on DCB Link\n", csk->tid);
1473 flowc->mnemval[index].val = cpu_to_be32(0);
1474 } else
1475 flowc->mnemval[index].val = cpu_to_be32(
1476 (vlan & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT);
1477 #endif
1478
1479 pr_debug("%s: csk %p; tx_chan = %u; rss_qid = %u; snd_seq = %u;"
1480 " rcv_seq = %u; snd_win = %u; emss = %u\n",
1481 __func__, csk, csk->tx_chan, csk->rss_qid, csk->snd_nxt,
1482 csk->rcv_nxt, csk->snd_win, csk->emss);
1483 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->txq_idx);
1484 cxgbit_ofld_send(csk->com.cdev, skb);
1485 return flowclen16;
1486 }
1487
1488 static int
cxgbit_send_tcb_skb(struct cxgbit_sock * csk,struct sk_buff * skb)1489 cxgbit_send_tcb_skb(struct cxgbit_sock *csk, struct sk_buff *skb)
1490 {
1491 spin_lock_bh(&csk->lock);
1492 if (unlikely(csk->com.state != CSK_STATE_ESTABLISHED)) {
1493 spin_unlock_bh(&csk->lock);
1494 pr_err("%s: csk 0x%p, tid %u, state %u\n",
1495 __func__, csk, csk->tid, csk->com.state);
1496 __kfree_skb(skb);
1497 return -1;
1498 }
1499
1500 cxgbit_get_csk(csk);
1501 cxgbit_init_wr_wait(&csk->com.wr_wait);
1502 cxgbit_ofld_send(csk->com.cdev, skb);
1503 spin_unlock_bh(&csk->lock);
1504
1505 return 0;
1506 }
1507
cxgbit_setup_conn_digest(struct cxgbit_sock * csk)1508 int cxgbit_setup_conn_digest(struct cxgbit_sock *csk)
1509 {
1510 struct sk_buff *skb;
1511 struct cpl_set_tcb_field *req;
1512 u8 hcrc = csk->submode & CXGBIT_SUBMODE_HCRC;
1513 u8 dcrc = csk->submode & CXGBIT_SUBMODE_DCRC;
1514 unsigned int len = roundup(sizeof(*req), 16);
1515 int ret;
1516
1517 skb = alloc_skb(len, GFP_KERNEL);
1518 if (!skb)
1519 return -ENOMEM;
1520
1521 /* set up ulp submode */
1522 req = __skb_put_zero(skb, len);
1523
1524 INIT_TP_WR(req, csk->tid);
1525 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid));
1526 req->reply_ctrl = htons(NO_REPLY_V(0) | QUEUENO_V(csk->rss_qid));
1527 req->word_cookie = htons(0);
1528 req->mask = cpu_to_be64(0x3 << 4);
1529 req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) |
1530 (dcrc ? ULP_CRC_DATA : 0)) << 4);
1531 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->ctrlq_idx);
1532
1533 if (cxgbit_send_tcb_skb(csk, skb))
1534 return -1;
1535
1536 ret = cxgbit_wait_for_reply(csk->com.cdev,
1537 &csk->com.wr_wait,
1538 csk->tid, 5, __func__);
1539 if (ret)
1540 return -1;
1541
1542 return 0;
1543 }
1544
cxgbit_setup_conn_pgidx(struct cxgbit_sock * csk,u32 pg_idx)1545 int cxgbit_setup_conn_pgidx(struct cxgbit_sock *csk, u32 pg_idx)
1546 {
1547 struct sk_buff *skb;
1548 struct cpl_set_tcb_field *req;
1549 unsigned int len = roundup(sizeof(*req), 16);
1550 int ret;
1551
1552 skb = alloc_skb(len, GFP_KERNEL);
1553 if (!skb)
1554 return -ENOMEM;
1555
1556 req = __skb_put_zero(skb, len);
1557
1558 INIT_TP_WR(req, csk->tid);
1559 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid));
1560 req->reply_ctrl = htons(NO_REPLY_V(0) | QUEUENO_V(csk->rss_qid));
1561 req->word_cookie = htons(0);
1562 req->mask = cpu_to_be64(0x3 << 8);
1563 req->val = cpu_to_be64(pg_idx << 8);
1564 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->ctrlq_idx);
1565
1566 if (cxgbit_send_tcb_skb(csk, skb))
1567 return -1;
1568
1569 ret = cxgbit_wait_for_reply(csk->com.cdev,
1570 &csk->com.wr_wait,
1571 csk->tid, 5, __func__);
1572 if (ret)
1573 return -1;
1574
1575 return 0;
1576 }
1577
1578 static void
cxgbit_pass_open_rpl(struct cxgbit_device * cdev,struct sk_buff * skb)1579 cxgbit_pass_open_rpl(struct cxgbit_device *cdev, struct sk_buff *skb)
1580 {
1581 struct cpl_pass_open_rpl *rpl = cplhdr(skb);
1582 struct tid_info *t = cdev->lldi.tids;
1583 unsigned int stid = GET_TID(rpl);
1584 struct cxgbit_np *cnp = lookup_stid(t, stid);
1585
1586 pr_debug("%s: cnp = %p; stid = %u; status = %d\n",
1587 __func__, cnp, stid, rpl->status);
1588
1589 if (!cnp) {
1590 pr_info("%s stid %d lookup failure\n", __func__, stid);
1591 goto rel_skb;
1592 }
1593
1594 cxgbit_wake_up(&cnp->com.wr_wait, __func__, rpl->status);
1595 cxgbit_put_cnp(cnp);
1596 rel_skb:
1597 __kfree_skb(skb);
1598 }
1599
1600 static void
cxgbit_close_listsrv_rpl(struct cxgbit_device * cdev,struct sk_buff * skb)1601 cxgbit_close_listsrv_rpl(struct cxgbit_device *cdev, struct sk_buff *skb)
1602 {
1603 struct cpl_close_listsvr_rpl *rpl = cplhdr(skb);
1604 struct tid_info *t = cdev->lldi.tids;
1605 unsigned int stid = GET_TID(rpl);
1606 struct cxgbit_np *cnp = lookup_stid(t, stid);
1607
1608 pr_debug("%s: cnp = %p; stid = %u; status = %d\n",
1609 __func__, cnp, stid, rpl->status);
1610
1611 if (!cnp) {
1612 pr_info("%s stid %d lookup failure\n", __func__, stid);
1613 goto rel_skb;
1614 }
1615
1616 cxgbit_wake_up(&cnp->com.wr_wait, __func__, rpl->status);
1617 cxgbit_put_cnp(cnp);
1618 rel_skb:
1619 __kfree_skb(skb);
1620 }
1621
1622 static void
cxgbit_pass_establish(struct cxgbit_device * cdev,struct sk_buff * skb)1623 cxgbit_pass_establish(struct cxgbit_device *cdev, struct sk_buff *skb)
1624 {
1625 struct cpl_pass_establish *req = cplhdr(skb);
1626 struct tid_info *t = cdev->lldi.tids;
1627 unsigned int tid = GET_TID(req);
1628 struct cxgbit_sock *csk;
1629 struct cxgbit_np *cnp;
1630 u16 tcp_opt = be16_to_cpu(req->tcp_opt);
1631 u32 snd_isn = be32_to_cpu(req->snd_isn);
1632 u32 rcv_isn = be32_to_cpu(req->rcv_isn);
1633
1634 csk = lookup_tid(t, tid);
1635 if (unlikely(!csk)) {
1636 pr_err("can't find connection for tid %u.\n", tid);
1637 goto rel_skb;
1638 }
1639 cnp = csk->cnp;
1640
1641 pr_debug("%s: csk %p; tid %u; cnp %p\n",
1642 __func__, csk, tid, cnp);
1643
1644 csk->write_seq = snd_isn;
1645 csk->snd_una = snd_isn;
1646 csk->snd_nxt = snd_isn;
1647
1648 csk->rcv_nxt = rcv_isn;
1649
1650 csk->snd_wscale = TCPOPT_SND_WSCALE_G(tcp_opt);
1651 cxgbit_set_emss(csk, tcp_opt);
1652 dst_confirm(csk->dst);
1653 csk->com.state = CSK_STATE_ESTABLISHED;
1654 spin_lock_bh(&cnp->np_accept_lock);
1655 list_add_tail(&csk->accept_node, &cnp->np_accept_list);
1656 spin_unlock_bh(&cnp->np_accept_lock);
1657 complete(&cnp->accept_comp);
1658 rel_skb:
1659 __kfree_skb(skb);
1660 }
1661
cxgbit_queue_rx_skb(struct cxgbit_sock * csk,struct sk_buff * skb)1662 static void cxgbit_queue_rx_skb(struct cxgbit_sock *csk, struct sk_buff *skb)
1663 {
1664 cxgbit_skcb_flags(skb) = 0;
1665 spin_lock_bh(&csk->rxq.lock);
1666 __skb_queue_tail(&csk->rxq, skb);
1667 spin_unlock_bh(&csk->rxq.lock);
1668 wake_up(&csk->waitq);
1669 }
1670
cxgbit_peer_close(struct cxgbit_sock * csk,struct sk_buff * skb)1671 static void cxgbit_peer_close(struct cxgbit_sock *csk, struct sk_buff *skb)
1672 {
1673 pr_debug("%s: csk %p; tid %u; state %d\n",
1674 __func__, csk, csk->tid, csk->com.state);
1675
1676 switch (csk->com.state) {
1677 case CSK_STATE_ESTABLISHED:
1678 csk->com.state = CSK_STATE_CLOSING;
1679 cxgbit_queue_rx_skb(csk, skb);
1680 return;
1681 case CSK_STATE_CLOSING:
1682 /* simultaneous close */
1683 csk->com.state = CSK_STATE_MORIBUND;
1684 break;
1685 case CSK_STATE_MORIBUND:
1686 csk->com.state = CSK_STATE_DEAD;
1687 cxgbit_put_csk(csk);
1688 break;
1689 case CSK_STATE_ABORTING:
1690 break;
1691 default:
1692 pr_info("%s: cpl_peer_close in bad state %d\n",
1693 __func__, csk->com.state);
1694 }
1695
1696 __kfree_skb(skb);
1697 }
1698
cxgbit_close_con_rpl(struct cxgbit_sock * csk,struct sk_buff * skb)1699 static void cxgbit_close_con_rpl(struct cxgbit_sock *csk, struct sk_buff *skb)
1700 {
1701 pr_debug("%s: csk %p; tid %u; state %d\n",
1702 __func__, csk, csk->tid, csk->com.state);
1703
1704 switch (csk->com.state) {
1705 case CSK_STATE_CLOSING:
1706 csk->com.state = CSK_STATE_MORIBUND;
1707 break;
1708 case CSK_STATE_MORIBUND:
1709 csk->com.state = CSK_STATE_DEAD;
1710 cxgbit_put_csk(csk);
1711 break;
1712 case CSK_STATE_ABORTING:
1713 case CSK_STATE_DEAD:
1714 break;
1715 default:
1716 pr_info("%s: cpl_close_con_rpl in bad state %d\n",
1717 __func__, csk->com.state);
1718 }
1719
1720 __kfree_skb(skb);
1721 }
1722
cxgbit_abort_req_rss(struct cxgbit_sock * csk,struct sk_buff * skb)1723 static void cxgbit_abort_req_rss(struct cxgbit_sock *csk, struct sk_buff *skb)
1724 {
1725 struct cpl_abort_req_rss *hdr = cplhdr(skb);
1726 unsigned int tid = GET_TID(hdr);
1727 struct sk_buff *rpl_skb;
1728 bool release = false;
1729 bool wakeup_thread = false;
1730 u32 len = roundup(sizeof(struct cpl_abort_rpl), 16);
1731
1732 pr_debug("%s: csk %p; tid %u; state %d\n",
1733 __func__, csk, tid, csk->com.state);
1734
1735 if (cxgb_is_neg_adv(hdr->status)) {
1736 pr_err("%s: got neg advise %d on tid %u\n",
1737 __func__, hdr->status, tid);
1738 goto rel_skb;
1739 }
1740
1741 switch (csk->com.state) {
1742 case CSK_STATE_CONNECTING:
1743 case CSK_STATE_MORIBUND:
1744 csk->com.state = CSK_STATE_DEAD;
1745 release = true;
1746 break;
1747 case CSK_STATE_ESTABLISHED:
1748 csk->com.state = CSK_STATE_DEAD;
1749 wakeup_thread = true;
1750 break;
1751 case CSK_STATE_CLOSING:
1752 csk->com.state = CSK_STATE_DEAD;
1753 if (!csk->conn)
1754 release = true;
1755 break;
1756 case CSK_STATE_ABORTING:
1757 break;
1758 default:
1759 pr_info("%s: cpl_abort_req_rss in bad state %d\n",
1760 __func__, csk->com.state);
1761 csk->com.state = CSK_STATE_DEAD;
1762 }
1763
1764 __skb_queue_purge(&csk->txq);
1765
1766 if (!test_and_set_bit(CSK_TX_DATA_SENT, &csk->com.flags))
1767 cxgbit_send_tx_flowc_wr(csk);
1768
1769 rpl_skb = __skb_dequeue(&csk->skbq);
1770
1771 cxgb_mk_abort_rpl(rpl_skb, len, csk->tid, csk->txq_idx);
1772 cxgbit_ofld_send(csk->com.cdev, rpl_skb);
1773
1774 if (wakeup_thread) {
1775 cxgbit_queue_rx_skb(csk, skb);
1776 return;
1777 }
1778
1779 if (release)
1780 cxgbit_put_csk(csk);
1781 rel_skb:
1782 __kfree_skb(skb);
1783 }
1784
cxgbit_abort_rpl_rss(struct cxgbit_sock * csk,struct sk_buff * skb)1785 static void cxgbit_abort_rpl_rss(struct cxgbit_sock *csk, struct sk_buff *skb)
1786 {
1787 struct cpl_abort_rpl_rss *rpl = cplhdr(skb);
1788
1789 pr_debug("%s: csk %p; tid %u; state %d\n",
1790 __func__, csk, csk->tid, csk->com.state);
1791
1792 switch (csk->com.state) {
1793 case CSK_STATE_ABORTING:
1794 csk->com.state = CSK_STATE_DEAD;
1795 if (test_bit(CSK_ABORT_RPL_WAIT, &csk->com.flags))
1796 cxgbit_wake_up(&csk->com.wr_wait, __func__,
1797 rpl->status);
1798 cxgbit_put_csk(csk);
1799 break;
1800 default:
1801 pr_info("%s: cpl_abort_rpl_rss in state %d\n",
1802 __func__, csk->com.state);
1803 }
1804
1805 __kfree_skb(skb);
1806 }
1807
cxgbit_credit_err(const struct cxgbit_sock * csk)1808 static bool cxgbit_credit_err(const struct cxgbit_sock *csk)
1809 {
1810 const struct sk_buff *skb = csk->wr_pending_head;
1811 u32 credit = 0;
1812
1813 if (unlikely(csk->wr_cred > csk->wr_max_cred)) {
1814 pr_err("csk 0x%p, tid %u, credit %u > %u\n",
1815 csk, csk->tid, csk->wr_cred, csk->wr_max_cred);
1816 return true;
1817 }
1818
1819 while (skb) {
1820 credit += (__force u32)skb->csum;
1821 skb = cxgbit_skcb_tx_wr_next(skb);
1822 }
1823
1824 if (unlikely((csk->wr_cred + credit) != csk->wr_max_cred)) {
1825 pr_err("csk 0x%p, tid %u, credit %u + %u != %u.\n",
1826 csk, csk->tid, csk->wr_cred,
1827 credit, csk->wr_max_cred);
1828
1829 return true;
1830 }
1831
1832 return false;
1833 }
1834
cxgbit_fw4_ack(struct cxgbit_sock * csk,struct sk_buff * skb)1835 static void cxgbit_fw4_ack(struct cxgbit_sock *csk, struct sk_buff *skb)
1836 {
1837 struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)cplhdr(skb);
1838 u32 credits = rpl->credits;
1839 u32 snd_una = ntohl(rpl->snd_una);
1840
1841 csk->wr_cred += credits;
1842 if (csk->wr_una_cred > (csk->wr_max_cred - csk->wr_cred))
1843 csk->wr_una_cred = csk->wr_max_cred - csk->wr_cred;
1844
1845 while (credits) {
1846 struct sk_buff *p = cxgbit_sock_peek_wr(csk);
1847 u32 csum;
1848
1849 if (unlikely(!p)) {
1850 pr_err("csk 0x%p,%u, cr %u,%u+%u, empty.\n",
1851 csk, csk->tid, credits,
1852 csk->wr_cred, csk->wr_una_cred);
1853 break;
1854 }
1855
1856 csum = (__force u32)p->csum;
1857 if (unlikely(credits < csum)) {
1858 pr_warn("csk 0x%p,%u, cr %u,%u+%u, < %u.\n",
1859 csk, csk->tid,
1860 credits, csk->wr_cred, csk->wr_una_cred,
1861 csum);
1862 p->csum = (__force __wsum)(csum - credits);
1863 break;
1864 }
1865
1866 cxgbit_sock_dequeue_wr(csk);
1867 credits -= csum;
1868 kfree_skb(p);
1869 }
1870
1871 if (unlikely(cxgbit_credit_err(csk))) {
1872 cxgbit_queue_rx_skb(csk, skb);
1873 return;
1874 }
1875
1876 if (rpl->seq_vld & CPL_FW4_ACK_FLAGS_SEQVAL) {
1877 if (unlikely(before(snd_una, csk->snd_una))) {
1878 pr_warn("csk 0x%p,%u, snd_una %u/%u.",
1879 csk, csk->tid, snd_una,
1880 csk->snd_una);
1881 goto rel_skb;
1882 }
1883
1884 if (csk->snd_una != snd_una) {
1885 csk->snd_una = snd_una;
1886 dst_confirm(csk->dst);
1887 }
1888 }
1889
1890 if (skb_queue_len(&csk->txq))
1891 cxgbit_push_tx_frames(csk);
1892
1893 rel_skb:
1894 __kfree_skb(skb);
1895 }
1896
cxgbit_set_tcb_rpl(struct cxgbit_device * cdev,struct sk_buff * skb)1897 static void cxgbit_set_tcb_rpl(struct cxgbit_device *cdev, struct sk_buff *skb)
1898 {
1899 struct cxgbit_sock *csk;
1900 struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data;
1901 unsigned int tid = GET_TID(rpl);
1902 struct cxgb4_lld_info *lldi = &cdev->lldi;
1903 struct tid_info *t = lldi->tids;
1904
1905 csk = lookup_tid(t, tid);
1906 if (unlikely(!csk)) {
1907 pr_err("can't find connection for tid %u.\n", tid);
1908 goto rel_skb;
1909 } else {
1910 cxgbit_wake_up(&csk->com.wr_wait, __func__, rpl->status);
1911 }
1912
1913 cxgbit_put_csk(csk);
1914 rel_skb:
1915 __kfree_skb(skb);
1916 }
1917
cxgbit_rx_data(struct cxgbit_device * cdev,struct sk_buff * skb)1918 static void cxgbit_rx_data(struct cxgbit_device *cdev, struct sk_buff *skb)
1919 {
1920 struct cxgbit_sock *csk;
1921 struct cpl_rx_data *cpl = cplhdr(skb);
1922 unsigned int tid = GET_TID(cpl);
1923 struct cxgb4_lld_info *lldi = &cdev->lldi;
1924 struct tid_info *t = lldi->tids;
1925
1926 csk = lookup_tid(t, tid);
1927 if (unlikely(!csk)) {
1928 pr_err("can't find conn. for tid %u.\n", tid);
1929 goto rel_skb;
1930 }
1931
1932 cxgbit_queue_rx_skb(csk, skb);
1933 return;
1934 rel_skb:
1935 __kfree_skb(skb);
1936 }
1937
1938 static void
__cxgbit_process_rx_cpl(struct cxgbit_sock * csk,struct sk_buff * skb)1939 __cxgbit_process_rx_cpl(struct cxgbit_sock *csk, struct sk_buff *skb)
1940 {
1941 spin_lock(&csk->lock);
1942 if (csk->lock_owner) {
1943 __skb_queue_tail(&csk->backlogq, skb);
1944 spin_unlock(&csk->lock);
1945 return;
1946 }
1947
1948 cxgbit_skcb_rx_backlog_fn(skb)(csk, skb);
1949 spin_unlock(&csk->lock);
1950 }
1951
cxgbit_process_rx_cpl(struct cxgbit_sock * csk,struct sk_buff * skb)1952 static void cxgbit_process_rx_cpl(struct cxgbit_sock *csk, struct sk_buff *skb)
1953 {
1954 cxgbit_get_csk(csk);
1955 __cxgbit_process_rx_cpl(csk, skb);
1956 cxgbit_put_csk(csk);
1957 }
1958
cxgbit_rx_cpl(struct cxgbit_device * cdev,struct sk_buff * skb)1959 static void cxgbit_rx_cpl(struct cxgbit_device *cdev, struct sk_buff *skb)
1960 {
1961 struct cxgbit_sock *csk;
1962 struct cpl_tx_data *cpl = cplhdr(skb);
1963 struct cxgb4_lld_info *lldi = &cdev->lldi;
1964 struct tid_info *t = lldi->tids;
1965 unsigned int tid = GET_TID(cpl);
1966 u8 opcode = cxgbit_skcb_rx_opcode(skb);
1967 bool ref = true;
1968
1969 switch (opcode) {
1970 case CPL_FW4_ACK:
1971 cxgbit_skcb_rx_backlog_fn(skb) = cxgbit_fw4_ack;
1972 ref = false;
1973 break;
1974 case CPL_PEER_CLOSE:
1975 cxgbit_skcb_rx_backlog_fn(skb) = cxgbit_peer_close;
1976 break;
1977 case CPL_CLOSE_CON_RPL:
1978 cxgbit_skcb_rx_backlog_fn(skb) = cxgbit_close_con_rpl;
1979 break;
1980 case CPL_ABORT_REQ_RSS:
1981 cxgbit_skcb_rx_backlog_fn(skb) = cxgbit_abort_req_rss;
1982 break;
1983 case CPL_ABORT_RPL_RSS:
1984 cxgbit_skcb_rx_backlog_fn(skb) = cxgbit_abort_rpl_rss;
1985 break;
1986 default:
1987 goto rel_skb;
1988 }
1989
1990 csk = lookup_tid(t, tid);
1991 if (unlikely(!csk)) {
1992 pr_err("can't find conn. for tid %u.\n", tid);
1993 goto rel_skb;
1994 }
1995
1996 if (ref)
1997 cxgbit_process_rx_cpl(csk, skb);
1998 else
1999 __cxgbit_process_rx_cpl(csk, skb);
2000
2001 return;
2002 rel_skb:
2003 __kfree_skb(skb);
2004 }
2005
2006 cxgbit_cplhandler_func cxgbit_cplhandlers[NUM_CPL_CMDS] = {
2007 [CPL_PASS_OPEN_RPL] = cxgbit_pass_open_rpl,
2008 [CPL_CLOSE_LISTSRV_RPL] = cxgbit_close_listsrv_rpl,
2009 [CPL_PASS_ACCEPT_REQ] = cxgbit_pass_accept_req,
2010 [CPL_PASS_ESTABLISH] = cxgbit_pass_establish,
2011 [CPL_SET_TCB_RPL] = cxgbit_set_tcb_rpl,
2012 [CPL_RX_DATA] = cxgbit_rx_data,
2013 [CPL_FW4_ACK] = cxgbit_rx_cpl,
2014 [CPL_PEER_CLOSE] = cxgbit_rx_cpl,
2015 [CPL_CLOSE_CON_RPL] = cxgbit_rx_cpl,
2016 [CPL_ABORT_REQ_RSS] = cxgbit_rx_cpl,
2017 [CPL_ABORT_RPL_RSS] = cxgbit_rx_cpl,
2018 };
2019