]> git.proxmox.com Git - mirror_ubuntu-hirsute-kernel.git/blob - drivers/infiniband/hw/cxgb4/cm.c
projects / mirror_ubuntu-hirsute-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge tag 'nfsd-4.8-2' of git://linux-nfs.org/~bfields/linux
[mirror_ubuntu-hirsute-kernel.git] / drivers / infiniband / hw / cxgb4 / cm.c
1 /*
2 * Copyright (c) 2009-2014 Chelsio, Inc. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 */
32 #include <linux/module.h>
33 #include <linux/list.h>
34 #include <linux/workqueue.h>
35 #include <linux/skbuff.h>
36 #include <linux/timer.h>
37 #include <linux/notifier.h>
38 #include <linux/inetdevice.h>
39 #include <linux/ip.h>
40 #include <linux/tcp.h>
41 #include <linux/if_vlan.h>
42
43 #include <net/neighbour.h>
44 #include <net/netevent.h>
45 #include <net/route.h>
46 #include <net/tcp.h>
47 #include <net/ip6_route.h>
48 #include <net/addrconf.h>
49
50 #include <rdma/ib_addr.h>
51
52 #include "iw_cxgb4.h"
53 #include "clip_tbl.h"
54
55 static char *states[] = {
56 "idle",
57 "listen",
58 "connecting",
59 "mpa_wait_req",
60 "mpa_req_sent",
61 "mpa_req_rcvd",
62 "mpa_rep_sent",
63 "fpdu_mode",
64 "aborting",
65 "closing",
66 "moribund",
67 "dead",
68 NULL,
69 };
70
71 static int nocong;
72 module_param(nocong, int, 0644);
73 MODULE_PARM_DESC(nocong, "Turn of congestion control (default=0)");
74
75 static int enable_ecn;
76 module_param(enable_ecn, int, 0644);
77 MODULE_PARM_DESC(enable_ecn, "Enable ECN (default=0/disabled)");
78
79 static int dack_mode = 1;
80 module_param(dack_mode, int, 0644);
81 MODULE_PARM_DESC(dack_mode, "Delayed ack mode (default=1)");
82
83 uint c4iw_max_read_depth = 32;
84 module_param(c4iw_max_read_depth, int, 0644);
85 MODULE_PARM_DESC(c4iw_max_read_depth,
86 "Per-connection max ORD/IRD (default=32)");
87
88 static int enable_tcp_timestamps;
89 module_param(enable_tcp_timestamps, int, 0644);
90 MODULE_PARM_DESC(enable_tcp_timestamps, "Enable tcp timestamps (default=0)");
91
92 static int enable_tcp_sack;
93 module_param(enable_tcp_sack, int, 0644);
94 MODULE_PARM_DESC(enable_tcp_sack, "Enable tcp SACK (default=0)");
95
96 static int enable_tcp_window_scaling = 1;
97 module_param(enable_tcp_window_scaling, int, 0644);
98 MODULE_PARM_DESC(enable_tcp_window_scaling,
99 "Enable tcp window scaling (default=1)");
100
101 int c4iw_debug;
102 module_param(c4iw_debug, int, 0644);
103 MODULE_PARM_DESC(c4iw_debug, "Enable debug logging (default=0)");
104
105 static int peer2peer = 1;
106 module_param(peer2peer, int, 0644);
107 MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=1)");
108
109 static int p2p_type = FW_RI_INIT_P2PTYPE_READ_REQ;
110 module_param(p2p_type, int, 0644);
111 MODULE_PARM_DESC(p2p_type, "RDMAP opcode to use for the RTR message: "
112 "1=RDMA_READ 0=RDMA_WRITE (default 1)");
113
114 static int ep_timeout_secs = 60;
115 module_param(ep_timeout_secs, int, 0644);
116 MODULE_PARM_DESC(ep_timeout_secs, "CM Endpoint operation timeout "
117 "in seconds (default=60)");
118
119 static int mpa_rev = 2;
120 module_param(mpa_rev, int, 0644);
121 MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, "
122 "1 is RFC5044 spec compliant, 2 is IETF MPA Peer Connect Draft"
123 " compliant (default=2)");
124
125 static int markers_enabled;
126 module_param(markers_enabled, int, 0644);
127 MODULE_PARM_DESC(markers_enabled, "Enable MPA MARKERS (default(0)=disabled)");
128
129 static int crc_enabled = 1;
130 module_param(crc_enabled, int, 0644);
131 MODULE_PARM_DESC(crc_enabled, "Enable MPA CRC (default(1)=enabled)");
132
133 static int rcv_win = 256 * 1024;
134 module_param(rcv_win, int, 0644);
135 MODULE_PARM_DESC(rcv_win, "TCP receive window in bytes (default=256KB)");
136
137 static int snd_win = 128 * 1024;
138 module_param(snd_win, int, 0644);
139 MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=128KB)");
140
141 static struct workqueue_struct *workq;
142
143 static struct sk_buff_head rxq;
144
145 static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp);
146 static void ep_timeout(unsigned long arg);
147 static void connect_reply_upcall(struct c4iw_ep *ep, int status);
148 static int sched(struct c4iw_dev *dev, struct sk_buff *skb);
149
150 static LIST_HEAD(timeout_list);
151 static spinlock_t timeout_lock;
152
153 static void deref_cm_id(struct c4iw_ep_common *epc)
154 {
155 epc->cm_id->rem_ref(epc->cm_id);
156 epc->cm_id = NULL;
157 set_bit(CM_ID_DEREFED, &epc->history);
158 }
159
160 static void ref_cm_id(struct c4iw_ep_common *epc)
161 {
162 set_bit(CM_ID_REFED, &epc->history);
163 epc->cm_id->add_ref(epc->cm_id);
164 }
165
166 static void deref_qp(struct c4iw_ep *ep)
167 {
168 c4iw_qp_rem_ref(&ep->com.qp->ibqp);
169 clear_bit(QP_REFERENCED, &ep->com.flags);
170 set_bit(QP_DEREFED, &ep->com.history);
171 }
172
173 static void ref_qp(struct c4iw_ep *ep)
174 {
175 set_bit(QP_REFERENCED, &ep->com.flags);
176 set_bit(QP_REFED, &ep->com.history);
177 c4iw_qp_add_ref(&ep->com.qp->ibqp);
178 }
179
180 static void start_ep_timer(struct c4iw_ep *ep)
181 {
182 PDBG("%s ep %p\n", __func__, ep);
183 if (timer_pending(&ep->timer)) {
184 pr_err("%s timer already started! ep %p\n",
185 __func__, ep);
186 return;
187 }
188 clear_bit(TIMEOUT, &ep->com.flags);
189 c4iw_get_ep(&ep->com);
190 ep->timer.expires = jiffies + ep_timeout_secs * HZ;
191 ep->timer.data = (unsigned long)ep;
192 ep->timer.function = ep_timeout;
193 add_timer(&ep->timer);
194 }
195
196 static int stop_ep_timer(struct c4iw_ep *ep)
197 {
198 PDBG("%s ep %p stopping\n", __func__, ep);
199 del_timer_sync(&ep->timer);
200 if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
201 c4iw_put_ep(&ep->com);
202 return 0;
203 }
204 return 1;
205 }
206
207 static int c4iw_l2t_send(struct c4iw_rdev *rdev, struct sk_buff *skb,
208 struct l2t_entry *l2e)
209 {
210 int error = 0;
211
212 if (c4iw_fatal_error(rdev)) {
213 kfree_skb(skb);
214 PDBG("%s - device in error state - dropping\n", __func__);
215 return -EIO;
216 }
217 error = cxgb4_l2t_send(rdev->lldi.ports[0], skb, l2e);
218 if (error < 0)
219 kfree_skb(skb);
220 else if (error == NET_XMIT_DROP)
221 return -ENOMEM;
222 return error < 0 ? error : 0;
223 }
224
225 int c4iw_ofld_send(struct c4iw_rdev *rdev, struct sk_buff *skb)
226 {
227 int error = 0;
228
229 if (c4iw_fatal_error(rdev)) {
230 kfree_skb(skb);
231 PDBG("%s - device in error state - dropping\n", __func__);
232 return -EIO;
233 }
234 error = cxgb4_ofld_send(rdev->lldi.ports[0], skb);
235 if (error < 0)
236 kfree_skb(skb);
237 return error < 0 ? error : 0;
238 }
239
240 static void release_tid(struct c4iw_rdev *rdev, u32 hwtid, struct sk_buff *skb)
241 {
242 struct cpl_tid_release *req;
243
244 skb = get_skb(skb, sizeof *req, GFP_KERNEL);
245 if (!skb)
246 return;
247 req = (struct cpl_tid_release *) skb_put(skb, sizeof(*req));
248 INIT_TP_WR(req, hwtid);
249 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_TID_RELEASE, hwtid));
250 set_wr_txq(skb, CPL_PRIORITY_SETUP, 0);
251 c4iw_ofld_send(rdev, skb);
252 return;
253 }
254
255 static void set_emss(struct c4iw_ep *ep, u16 opt)
256 {
257 ep->emss = ep->com.dev->rdev.lldi.mtus[TCPOPT_MSS_G(opt)] -
258 ((AF_INET == ep->com.remote_addr.ss_family) ?
259 sizeof(struct iphdr) : sizeof(struct ipv6hdr)) -
260 sizeof(struct tcphdr);
261 ep->mss = ep->emss;
262 if (TCPOPT_TSTAMP_G(opt))
263 ep->emss -= round_up(TCPOLEN_TIMESTAMP, 4);
264 if (ep->emss < 128)
265 ep->emss = 128;
266 if (ep->emss & 7)
267 PDBG("Warning: misaligned mtu idx %u mss %u emss=%u\n",
268 TCPOPT_MSS_G(opt), ep->mss, ep->emss);
269 PDBG("%s mss_idx %u mss %u emss=%u\n", __func__, TCPOPT_MSS_G(opt),
270 ep->mss, ep->emss);
271 }
272
273 static enum c4iw_ep_state state_read(struct c4iw_ep_common *epc)
274 {
275 enum c4iw_ep_state state;
276
277 mutex_lock(&epc->mutex);
278 state = epc->state;
279 mutex_unlock(&epc->mutex);
280 return state;
281 }
282
283 static void __state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
284 {
285 epc->state = new;
286 }
287
288 static void state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
289 {
290 mutex_lock(&epc->mutex);
291 PDBG("%s - %s -> %s\n", __func__, states[epc->state], states[new]);
292 __state_set(epc, new);
293 mutex_unlock(&epc->mutex);
294 return;
295 }
296
297 static int alloc_ep_skb_list(struct sk_buff_head *ep_skb_list, int size)
298 {
299 struct sk_buff *skb;
300 unsigned int i;
301 size_t len;
302
303 len = roundup(sizeof(union cpl_wr_size), 16);
304 for (i = 0; i < size; i++) {
305 skb = alloc_skb(len, GFP_KERNEL);
306 if (!skb)
307 goto fail;
308 skb_queue_tail(ep_skb_list, skb);
309 }
310 return 0;
311 fail:
312 skb_queue_purge(ep_skb_list);
313 return -ENOMEM;
314 }
315
316 static void *alloc_ep(int size, gfp_t gfp)
317 {
318 struct c4iw_ep_common *epc;
319
320 epc = kzalloc(size, gfp);
321 if (epc) {
322 kref_init(&epc->kref);
323 mutex_init(&epc->mutex);
324 c4iw_init_wr_wait(&epc->wr_wait);
325 }
326 PDBG("%s alloc ep %p\n", __func__, epc);
327 return epc;
328 }
329
330 static void remove_ep_tid(struct c4iw_ep *ep)
331 {
332 unsigned long flags;
333
334 spin_lock_irqsave(&ep->com.dev->lock, flags);
335 _remove_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep->hwtid, 0);
336 if (idr_is_empty(&ep->com.dev->hwtid_idr))
337 wake_up(&ep->com.dev->wait);
338 spin_unlock_irqrestore(&ep->com.dev->lock, flags);
339 }
340
341 static void insert_ep_tid(struct c4iw_ep *ep)
342 {
343 unsigned long flags;
344
345 spin_lock_irqsave(&ep->com.dev->lock, flags);
346 _insert_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep, ep->hwtid, 0);
347 spin_unlock_irqrestore(&ep->com.dev->lock, flags);
348 }
349
350 /*
351 * Atomically lookup the ep ptr given the tid and grab a reference on the ep.
352 */
353 static struct c4iw_ep *get_ep_from_tid(struct c4iw_dev *dev, unsigned int tid)
354 {
355 struct c4iw_ep *ep;
356 unsigned long flags;
357
358 spin_lock_irqsave(&dev->lock, flags);
359 ep = idr_find(&dev->hwtid_idr, tid);
360 if (ep)
361 c4iw_get_ep(&ep->com);
362 spin_unlock_irqrestore(&dev->lock, flags);
363 return ep;
364 }
365
366 /*
367 * Atomically lookup the ep ptr given the stid and grab a reference on the ep.
368 */
369 static struct c4iw_listen_ep *get_ep_from_stid(struct c4iw_dev *dev,
370 unsigned int stid)
371 {
372 struct c4iw_listen_ep *ep;
373 unsigned long flags;
374
375 spin_lock_irqsave(&dev->lock, flags);
376 ep = idr_find(&dev->stid_idr, stid);
377 if (ep)
378 c4iw_get_ep(&ep->com);
379 spin_unlock_irqrestore(&dev->lock, flags);
380 return ep;
381 }
382
383 void _c4iw_free_ep(struct kref *kref)
384 {
385 struct c4iw_ep *ep;
386
387 ep = container_of(kref, struct c4iw_ep, com.kref);
388 PDBG("%s ep %p state %s\n", __func__, ep, states[ep->com.state]);
389 if (test_bit(QP_REFERENCED, &ep->com.flags))
390 deref_qp(ep);
391 if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) {
392 if (ep->com.remote_addr.ss_family == AF_INET6) {
393 struct sockaddr_in6 *sin6 =
394 (struct sockaddr_in6 *)
395 &ep->com.local_addr;
396
397 cxgb4_clip_release(
398 ep->com.dev->rdev.lldi.ports[0],
399 (const u32 *)&sin6->sin6_addr.s6_addr,
400 1);
401 }
402 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
403 dst_release(ep->dst);
404 cxgb4_l2t_release(ep->l2t);
405 if (ep->mpa_skb)
406 kfree_skb(ep->mpa_skb);
407 }
408 if (!skb_queue_empty(&ep->com.ep_skb_list))
409 skb_queue_purge(&ep->com.ep_skb_list);
410 kfree(ep);
411 }
412
413 static void release_ep_resources(struct c4iw_ep *ep)
414 {
415 set_bit(RELEASE_RESOURCES, &ep->com.flags);
416
417 /*
418 * If we have a hwtid, then remove it from the idr table
419 * so lookups will no longer find this endpoint. Otherwise
420 * we have a race where one thread finds the ep ptr just
421 * before the other thread is freeing the ep memory.
422 */
423 if (ep->hwtid != -1)
424 remove_ep_tid(ep);
425 c4iw_put_ep(&ep->com);
426 }
427
428 static int status2errno(int status)
429 {
430 switch (status) {
431 case CPL_ERR_NONE:
432 return 0;
433 case CPL_ERR_CONN_RESET:
434 return -ECONNRESET;
435 case CPL_ERR_ARP_MISS:
436 return -EHOSTUNREACH;
437 case CPL_ERR_CONN_TIMEDOUT:
438 return -ETIMEDOUT;
439 case CPL_ERR_TCAM_FULL:
440 return -ENOMEM;
441 case CPL_ERR_CONN_EXIST:
442 return -EADDRINUSE;
443 default:
444 return -EIO;
445 }
446 }
447
448 /*
449 * Try and reuse skbs already allocated...
450 */
451 static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp)
452 {
453 if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) {
454 skb_trim(skb, 0);
455 skb_get(skb);
456 skb_reset_transport_header(skb);
457 } else {
458 skb = alloc_skb(len, gfp);
459 }
460 t4_set_arp_err_handler(skb, NULL, NULL);
461 return skb;
462 }
463
464 static struct net_device *get_real_dev(struct net_device *egress_dev)
465 {
466 return rdma_vlan_dev_real_dev(egress_dev) ? : egress_dev;
467 }
468
469 static int our_interface(struct c4iw_dev *dev, struct net_device *egress_dev)
470 {
471 int i;
472
473 egress_dev = get_real_dev(egress_dev);
474 for (i = 0; i < dev->rdev.lldi.nports; i++)
475 if (dev->rdev.lldi.ports[i] == egress_dev)
476 return 1;
477 return 0;
478 }
479
480 static struct dst_entry *find_route6(struct c4iw_dev *dev, __u8 *local_ip,
481 __u8 *peer_ip, __be16 local_port,
482 __be16 peer_port, u8 tos,
483 __u32 sin6_scope_id)
484 {
485 struct dst_entry *dst = NULL;
486
487 if (IS_ENABLED(CONFIG_IPV6)) {
488 struct flowi6 fl6;
489
490 memset(&fl6, 0, sizeof(fl6));
491 memcpy(&fl6.daddr, peer_ip, 16);
492 memcpy(&fl6.saddr, local_ip, 16);
493 if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
494 fl6.flowi6_oif = sin6_scope_id;
495 dst = ip6_route_output(&init_net, NULL, &fl6);
496 if (!dst)
497 goto out;
498 if (!our_interface(dev, ip6_dst_idev(dst)->dev) &&
499 !(ip6_dst_idev(dst)->dev->flags & IFF_LOOPBACK)) {
500 dst_release(dst);
501 dst = NULL;
502 }
503 }
504
505 out:
506 return dst;
507 }
508
509 static struct dst_entry *find_route(struct c4iw_dev *dev, __be32 local_ip,
510 __be32 peer_ip, __be16 local_port,
511 __be16 peer_port, u8 tos)
512 {
513 struct rtable *rt;
514 struct flowi4 fl4;
515 struct neighbour *n;
516
517 rt = ip_route_output_ports(&init_net, &fl4, NULL, peer_ip, local_ip,
518 peer_port, local_port, IPPROTO_TCP,
519 tos, 0);
520 if (IS_ERR(rt))
521 return NULL;
522 n = dst_neigh_lookup(&rt->dst, &peer_ip);
523 if (!n)
524 return NULL;
525 if (!our_interface(dev, n->dev) &&
526 !(n->dev->flags & IFF_LOOPBACK)) {
527 neigh_release(n);
528 dst_release(&rt->dst);
529 return NULL;
530 }
531 neigh_release(n);
532 return &rt->dst;
533 }
534
535 static void arp_failure_discard(void *handle, struct sk_buff *skb)
536 {
537 pr_err(MOD "ARP failure\n");
538 kfree_skb(skb);
539 }
540
541 static void mpa_start_arp_failure(void *handle, struct sk_buff *skb)
542 {
543 pr_err("ARP failure during MPA Negotiation - Closing Connection\n");
544 }
545
546 enum {
547 NUM_FAKE_CPLS = 2,
548 FAKE_CPL_PUT_EP_SAFE = NUM_CPL_CMDS + 0,
549 FAKE_CPL_PASS_PUT_EP_SAFE = NUM_CPL_CMDS + 1,
550 };
551
552 static int _put_ep_safe(struct c4iw_dev *dev, struct sk_buff *skb)
553 {
554 struct c4iw_ep *ep;
555
556 ep = *((struct c4iw_ep **)(skb->cb + 2 * sizeof(void *)));
557 release_ep_resources(ep);
558 return 0;
559 }
560
561 static int _put_pass_ep_safe(struct c4iw_dev *dev, struct sk_buff *skb)
562 {
563 struct c4iw_ep *ep;
564
565 ep = *((struct c4iw_ep **)(skb->cb + 2 * sizeof(void *)));
566 c4iw_put_ep(&ep->parent_ep->com);
567 release_ep_resources(ep);
568 return 0;
569 }
570
571 /*
572 * Fake up a special CPL opcode and call sched() so process_work() will call
573 * _put_ep_safe() in a safe context to free the ep resources. This is needed
574 * because ARP error handlers are called in an ATOMIC context, and
575 * _c4iw_free_ep() needs to block.
576 */
577 static void queue_arp_failure_cpl(struct c4iw_ep *ep, struct sk_buff *skb,
578 int cpl)
579 {
580 struct cpl_act_establish *rpl = cplhdr(skb);
581
582 /* Set our special ARP_FAILURE opcode */
583 rpl->ot.opcode = cpl;
584
585 /*
586 * Save ep in the skb->cb area, after where sched() will save the dev
587 * ptr.
588 */
589 *((struct c4iw_ep **)(skb->cb + 2 * sizeof(void *))) = ep;
590 sched(ep->com.dev, skb);
591 }
592
593 /* Handle an ARP failure for an accept */
594 static void pass_accept_rpl_arp_failure(void *handle, struct sk_buff *skb)
595 {
596 struct c4iw_ep *ep = handle;
597
598 pr_err(MOD "ARP failure during accept - tid %u -dropping connection\n",
599 ep->hwtid);
600
601 __state_set(&ep->com, DEAD);
602 queue_arp_failure_cpl(ep, skb, FAKE_CPL_PASS_PUT_EP_SAFE);
603 }
604
605 /*
606 * Handle an ARP failure for an active open.
607 */
608 static void act_open_req_arp_failure(void *handle, struct sk_buff *skb)
609 {
610 struct c4iw_ep *ep = handle;
611
612 printk(KERN_ERR MOD "ARP failure during connect\n");
613 connect_reply_upcall(ep, -EHOSTUNREACH);
614 __state_set(&ep->com, DEAD);
615 if (ep->com.remote_addr.ss_family == AF_INET6) {
616 struct sockaddr_in6 *sin6 =
617 (struct sockaddr_in6 *)&ep->com.local_addr;
618 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
619 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
620 }
621 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
622 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
623 queue_arp_failure_cpl(ep, skb, FAKE_CPL_PUT_EP_SAFE);
624 }
625
626 /*
627 * Handle an ARP failure for a CPL_ABORT_REQ. Change it into a no RST variant
628 * and send it along.
629 */
630 static void abort_arp_failure(void *handle, struct sk_buff *skb)
631 {
632 int ret;
633 struct c4iw_ep *ep = handle;
634 struct c4iw_rdev *rdev = &ep->com.dev->rdev;
635 struct cpl_abort_req *req = cplhdr(skb);
636
637 PDBG("%s rdev %p\n", __func__, rdev);
638 req->cmd = CPL_ABORT_NO_RST;
639 ret = c4iw_ofld_send(rdev, skb);
640 if (ret) {
641 __state_set(&ep->com, DEAD);
642 queue_arp_failure_cpl(ep, skb, FAKE_CPL_PUT_EP_SAFE);
643 }
644 }
645
646 static int send_flowc(struct c4iw_ep *ep)
647 {
648 struct fw_flowc_wr *flowc;
649 struct sk_buff *skb = skb_dequeue(&ep->com.ep_skb_list);
650 int i;
651 u16 vlan = ep->l2t->vlan;
652 int nparams;
653
654 if (WARN_ON(!skb))
655 return -ENOMEM;
656
657 if (vlan == CPL_L2T_VLAN_NONE)
658 nparams = 8;
659 else
660 nparams = 9;
661
662 flowc = (struct fw_flowc_wr *)__skb_put(skb, FLOWC_LEN);
663
664 flowc->op_to_nparams = cpu_to_be32(FW_WR_OP_V(FW_FLOWC_WR) |
665 FW_FLOWC_WR_NPARAMS_V(nparams));
666 flowc->flowid_len16 = cpu_to_be32(FW_WR_LEN16_V(DIV_ROUND_UP(FLOWC_LEN,
667 16)) | FW_WR_FLOWID_V(ep->hwtid));
668
669 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
670 flowc->mnemval[0].val = cpu_to_be32(FW_PFVF_CMD_PFN_V
671 (ep->com.dev->rdev.lldi.pf));
672 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
673 flowc->mnemval[1].val = cpu_to_be32(ep->tx_chan);
674 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
675 flowc->mnemval[2].val = cpu_to_be32(ep->tx_chan);
676 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
677 flowc->mnemval[3].val = cpu_to_be32(ep->rss_qid);
678 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
679 flowc->mnemval[4].val = cpu_to_be32(ep->snd_seq);
680 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
681 flowc->mnemval[5].val = cpu_to_be32(ep->rcv_seq);
682 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
683 flowc->mnemval[6].val = cpu_to_be32(ep->snd_win);
684 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
685 flowc->mnemval[7].val = cpu_to_be32(ep->emss);
686 if (nparams == 9) {
687 u16 pri;
688
689 pri = (vlan & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
690 flowc->mnemval[8].mnemonic = FW_FLOWC_MNEM_SCHEDCLASS;
691 flowc->mnemval[8].val = cpu_to_be32(pri);
692 } else {
693 /* Pad WR to 16 byte boundary */
694 flowc->mnemval[8].mnemonic = 0;
695 flowc->mnemval[8].val = 0;
696 }
697 for (i = 0; i < 9; i++) {
698 flowc->mnemval[i].r4[0] = 0;
699 flowc->mnemval[i].r4[1] = 0;
700 flowc->mnemval[i].r4[2] = 0;
701 }
702
703 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
704 return c4iw_ofld_send(&ep->com.dev->rdev, skb);
705 }
706
707 static int send_halfclose(struct c4iw_ep *ep)
708 {
709 struct cpl_close_con_req *req;
710 struct sk_buff *skb = skb_dequeue(&ep->com.ep_skb_list);
711 int wrlen = roundup(sizeof *req, 16);
712
713 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
714 if (WARN_ON(!skb))
715 return -ENOMEM;
716
717 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
718 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
719 req = (struct cpl_close_con_req *) skb_put(skb, wrlen);
720 memset(req, 0, wrlen);
721 INIT_TP_WR(req, ep->hwtid);
722 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ,
723 ep->hwtid));
724 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
725 }
726
727 static int send_abort(struct c4iw_ep *ep)
728 {
729 struct cpl_abort_req *req;
730 int wrlen = roundup(sizeof *req, 16);
731 struct sk_buff *req_skb = skb_dequeue(&ep->com.ep_skb_list);
732
733 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
734 if (WARN_ON(!req_skb))
735 return -ENOMEM;
736
737 set_wr_txq(req_skb, CPL_PRIORITY_DATA, ep->txq_idx);
738 t4_set_arp_err_handler(req_skb, ep, abort_arp_failure);
739 req = (struct cpl_abort_req *)skb_put(req_skb, wrlen);
740 memset(req, 0, wrlen);
741 INIT_TP_WR(req, ep->hwtid);
742 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, ep->hwtid));
743 req->cmd = CPL_ABORT_SEND_RST;
744 return c4iw_l2t_send(&ep->com.dev->rdev, req_skb, ep->l2t);
745 }
746
747 static void best_mtu(const unsigned short *mtus, unsigned short mtu,
748 unsigned int *idx, int use_ts, int ipv6)
749 {
750 unsigned short hdr_size = (ipv6 ?
751 sizeof(struct ipv6hdr) :
752 sizeof(struct iphdr)) +
753 sizeof(struct tcphdr) +
754 (use_ts ?
755 round_up(TCPOLEN_TIMESTAMP, 4) : 0);
756 unsigned short data_size = mtu - hdr_size;
757
758 cxgb4_best_aligned_mtu(mtus, hdr_size, data_size, 8, idx);
759 }
760
761 static int send_connect(struct c4iw_ep *ep)
762 {
763 struct cpl_act_open_req *req = NULL;
764 struct cpl_t5_act_open_req *t5req = NULL;
765 struct cpl_t6_act_open_req *t6req = NULL;
766 struct cpl_act_open_req6 *req6 = NULL;
767 struct cpl_t5_act_open_req6 *t5req6 = NULL;
768 struct cpl_t6_act_open_req6 *t6req6 = NULL;
769 struct sk_buff *skb;
770 u64 opt0;
771 u32 opt2;
772 unsigned int mtu_idx;
773 int wscale;
774 int win, sizev4, sizev6, wrlen;
775 struct sockaddr_in *la = (struct sockaddr_in *)
776 &ep->com.local_addr;
777 struct sockaddr_in *ra = (struct sockaddr_in *)
778 &ep->com.remote_addr;
779 struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)
780 &ep->com.local_addr;
781 struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)
782 &ep->com.remote_addr;
783 int ret;
784 enum chip_type adapter_type = ep->com.dev->rdev.lldi.adapter_type;
785 u32 isn = (prandom_u32() & ~7UL) - 1;
786
787 switch (CHELSIO_CHIP_VERSION(adapter_type)) {
788 case CHELSIO_T4:
789 sizev4 = sizeof(struct cpl_act_open_req);
790 sizev6 = sizeof(struct cpl_act_open_req6);
791 break;
792 case CHELSIO_T5:
793 sizev4 = sizeof(struct cpl_t5_act_open_req);
794 sizev6 = sizeof(struct cpl_t5_act_open_req6);
795 break;
796 case CHELSIO_T6:
797 sizev4 = sizeof(struct cpl_t6_act_open_req);
798 sizev6 = sizeof(struct cpl_t6_act_open_req6);
799 break;
800 default:
801 pr_err("T%d Chip is not supported\n",
802 CHELSIO_CHIP_VERSION(adapter_type));
803 return -EINVAL;
804 }
805
806 wrlen = (ep->com.remote_addr.ss_family == AF_INET) ?
807 roundup(sizev4, 16) :
808 roundup(sizev6, 16);
809
810 PDBG("%s ep %p atid %u\n", __func__, ep, ep->atid);
811
812 skb = get_skb(NULL, wrlen, GFP_KERNEL);
813 if (!skb) {
814 printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
815 __func__);
816 return -ENOMEM;
817 }
818 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
819
820 best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
821 enable_tcp_timestamps,
822 (AF_INET == ep->com.remote_addr.ss_family) ? 0 : 1);
823 wscale = compute_wscale(rcv_win);
824
825 /*
826 * Specify the largest window that will fit in opt0. The
827 * remainder will be specified in the rx_data_ack.
828 */
829 win = ep->rcv_win >> 10;
830 if (win > RCV_BUFSIZ_M)
831 win = RCV_BUFSIZ_M;
832
833 opt0 = (nocong ? NO_CONG_F : 0) |
834 KEEP_ALIVE_F |
835 DELACK_F |
836 WND_SCALE_V(wscale) |
837 MSS_IDX_V(mtu_idx) |
838 L2T_IDX_V(ep->l2t->idx) |
839 TX_CHAN_V(ep->tx_chan) |
840 SMAC_SEL_V(ep->smac_idx) |
841 DSCP_V(ep->tos >> 2) |
842 ULP_MODE_V(ULP_MODE_TCPDDP) |
843 RCV_BUFSIZ_V(win);
844 opt2 = RX_CHANNEL_V(0) |
845 CCTRL_ECN_V(enable_ecn) |
846 RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid);
847 if (enable_tcp_timestamps)
848 opt2 |= TSTAMPS_EN_F;
849 if (enable_tcp_sack)
850 opt2 |= SACK_EN_F;
851 if (wscale && enable_tcp_window_scaling)
852 opt2 |= WND_SCALE_EN_F;
853 if (CHELSIO_CHIP_VERSION(adapter_type) > CHELSIO_T4) {
854 if (peer2peer)
855 isn += 4;
856
857 opt2 |= T5_OPT_2_VALID_F;
858 opt2 |= CONG_CNTRL_V(CONG_ALG_TAHOE);
859 opt2 |= T5_ISS_F;
860 }
861
862 if (ep->com.remote_addr.ss_family == AF_INET6)
863 cxgb4_clip_get(ep->com.dev->rdev.lldi.ports[0],
864 (const u32 *)&la6->sin6_addr.s6_addr, 1);
865
866 t4_set_arp_err_handler(skb, ep, act_open_req_arp_failure);
867
868 if (ep->com.remote_addr.ss_family == AF_INET) {
869 switch (CHELSIO_CHIP_VERSION(adapter_type)) {
870 case CHELSIO_T4:
871 req = (struct cpl_act_open_req *)skb_put(skb, wrlen);
872 INIT_TP_WR(req, 0);
873 break;
874 case CHELSIO_T5:
875 t5req = (struct cpl_t5_act_open_req *)skb_put(skb,
876 wrlen);
877 INIT_TP_WR(t5req, 0);
878 req = (struct cpl_act_open_req *)t5req;
879 break;
880 case CHELSIO_T6:
881 t6req = (struct cpl_t6_act_open_req *)skb_put(skb,
882 wrlen);
883 INIT_TP_WR(t6req, 0);
884 req = (struct cpl_act_open_req *)t6req;
885 t5req = (struct cpl_t5_act_open_req *)t6req;
886 break;
887 default:
888 pr_err("T%d Chip is not supported\n",
889 CHELSIO_CHIP_VERSION(adapter_type));
890 ret = -EINVAL;
891 goto clip_release;
892 }
893
894 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
895 ((ep->rss_qid<<14) | ep->atid)));
896 req->local_port = la->sin_port;
897 req->peer_port = ra->sin_port;
898 req->local_ip = la->sin_addr.s_addr;
899 req->peer_ip = ra->sin_addr.s_addr;
900 req->opt0 = cpu_to_be64(opt0);
901
902 if (is_t4(ep->com.dev->rdev.lldi.adapter_type)) {
903 req->params = cpu_to_be32(cxgb4_select_ntuple(
904 ep->com.dev->rdev.lldi.ports[0],
905 ep->l2t));
906 req->opt2 = cpu_to_be32(opt2);
907 } else {
908 t5req->params = cpu_to_be64(FILTER_TUPLE_V(
909 cxgb4_select_ntuple(
910 ep->com.dev->rdev.lldi.ports[0],
911 ep->l2t)));
912 t5req->rsvd = cpu_to_be32(isn);
913 PDBG("%s snd_isn %u\n", __func__, t5req->rsvd);
914 t5req->opt2 = cpu_to_be32(opt2);
915 }
916 } else {
917 switch (CHELSIO_CHIP_VERSION(adapter_type)) {
918 case CHELSIO_T4:
919 req6 = (struct cpl_act_open_req6 *)skb_put(skb, wrlen);
920 INIT_TP_WR(req6, 0);
921 break;
922 case CHELSIO_T5:
923 t5req6 = (struct cpl_t5_act_open_req6 *)skb_put(skb,
924 wrlen);
925 INIT_TP_WR(t5req6, 0);
926 req6 = (struct cpl_act_open_req6 *)t5req6;
927 break;
928 case CHELSIO_T6:
929 t6req6 = (struct cpl_t6_act_open_req6 *)skb_put(skb,
930 wrlen);
931 INIT_TP_WR(t6req6, 0);
932 req6 = (struct cpl_act_open_req6 *)t6req6;
933 t5req6 = (struct cpl_t5_act_open_req6 *)t6req6;
934 break;
935 default:
936 pr_err("T%d Chip is not supported\n",
937 CHELSIO_CHIP_VERSION(adapter_type));
938 ret = -EINVAL;
939 goto clip_release;
940 }
941
942 OPCODE_TID(req6) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
943 ((ep->rss_qid<<14)|ep->atid)));
944 req6->local_port = la6->sin6_port;
945 req6->peer_port = ra6->sin6_port;
946 req6->local_ip_hi = *((__be64 *)(la6->sin6_addr.s6_addr));
947 req6->local_ip_lo = *((__be64 *)(la6->sin6_addr.s6_addr + 8));
948 req6->peer_ip_hi = *((__be64 *)(ra6->sin6_addr.s6_addr));
949 req6->peer_ip_lo = *((__be64 *)(ra6->sin6_addr.s6_addr + 8));
950 req6->opt0 = cpu_to_be64(opt0);
951
952 if (is_t4(ep->com.dev->rdev.lldi.adapter_type)) {
953 req6->params = cpu_to_be32(cxgb4_select_ntuple(
954 ep->com.dev->rdev.lldi.ports[0],
955 ep->l2t));
956 req6->opt2 = cpu_to_be32(opt2);
957 } else {
958 t5req6->params = cpu_to_be64(FILTER_TUPLE_V(
959 cxgb4_select_ntuple(
960 ep->com.dev->rdev.lldi.ports[0],
961 ep->l2t)));
962 t5req6->rsvd = cpu_to_be32(isn);
963 PDBG("%s snd_isn %u\n", __func__, t5req6->rsvd);
964 t5req6->opt2 = cpu_to_be32(opt2);
965 }
966 }
967
968 set_bit(ACT_OPEN_REQ, &ep->com.history);
969 ret = c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
970 clip_release:
971 if (ret && ep->com.remote_addr.ss_family == AF_INET6)
972 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
973 (const u32 *)&la6->sin6_addr.s6_addr, 1);
974 return ret;
975 }
976
977 static int send_mpa_req(struct c4iw_ep *ep, struct sk_buff *skb,
978 u8 mpa_rev_to_use)
979 {
980 int mpalen, wrlen, ret;
981 struct fw_ofld_tx_data_wr *req;
982 struct mpa_message *mpa;
983 struct mpa_v2_conn_params mpa_v2_params;
984
985 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
986
987 BUG_ON(skb_cloned(skb));
988
989 mpalen = sizeof(*mpa) + ep->plen;
990 if (mpa_rev_to_use == 2)
991 mpalen += sizeof(struct mpa_v2_conn_params);
992 wrlen = roundup(mpalen + sizeof *req, 16);
993 skb = get_skb(skb, wrlen, GFP_KERNEL);
994 if (!skb) {
995 connect_reply_upcall(ep, -ENOMEM);
996 return -ENOMEM;
997 }
998 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
999
1000 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
1001 memset(req, 0, wrlen);
1002 req->op_to_immdlen = cpu_to_be32(
1003 FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
1004 FW_WR_COMPL_F |
1005 FW_WR_IMMDLEN_V(mpalen));
1006 req->flowid_len16 = cpu_to_be32(
1007 FW_WR_FLOWID_V(ep->hwtid) |
1008 FW_WR_LEN16_V(wrlen >> 4));
1009 req->plen = cpu_to_be32(mpalen);
1010 req->tunnel_to_proxy = cpu_to_be32(
1011 FW_OFLD_TX_DATA_WR_FLUSH_F |
1012 FW_OFLD_TX_DATA_WR_SHOVE_F);
1013
1014 mpa = (struct mpa_message *)(req + 1);
1015 memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
1016
1017 mpa->flags = 0;
1018 if (crc_enabled)
1019 mpa->flags |= MPA_CRC;
1020 if (markers_enabled) {
1021 mpa->flags |= MPA_MARKERS;
1022 ep->mpa_attr.recv_marker_enabled = 1;
1023 } else {
1024 ep->mpa_attr.recv_marker_enabled = 0;
1025 }
1026 if (mpa_rev_to_use == 2)
1027 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
1028
1029 mpa->private_data_size = htons(ep->plen);
1030 mpa->revision = mpa_rev_to_use;
1031 if (mpa_rev_to_use == 1) {
1032 ep->tried_with_mpa_v1 = 1;
1033 ep->retry_with_mpa_v1 = 0;
1034 }
1035
1036 if (mpa_rev_to_use == 2) {
1037 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
1038 sizeof (struct mpa_v2_conn_params));
1039 PDBG("%s initiator ird %u ord %u\n", __func__, ep->ird,
1040 ep->ord);
1041 mpa_v2_params.ird = htons((u16)ep->ird);
1042 mpa_v2_params.ord = htons((u16)ep->ord);
1043
1044 if (peer2peer) {
1045 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
1046 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
1047 mpa_v2_params.ord |=
1048 htons(MPA_V2_RDMA_WRITE_RTR);
1049 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
1050 mpa_v2_params.ord |=
1051 htons(MPA_V2_RDMA_READ_RTR);
1052 }
1053 memcpy(mpa->private_data, &mpa_v2_params,
1054 sizeof(struct mpa_v2_conn_params));
1055
1056 if (ep->plen)
1057 memcpy(mpa->private_data +
1058 sizeof(struct mpa_v2_conn_params),
1059 ep->mpa_pkt + sizeof(*mpa), ep->plen);
1060 } else
1061 if (ep->plen)
1062 memcpy(mpa->private_data,
1063 ep->mpa_pkt + sizeof(*mpa), ep->plen);
1064
1065 /*
1066 * Reference the mpa skb. This ensures the data area
1067 * will remain in memory until the hw acks the tx.
1068 * Function fw4_ack() will deref it.
1069 */
1070 skb_get(skb);
1071 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
1072 BUG_ON(ep->mpa_skb);
1073 ep->mpa_skb = skb;
1074 ret = c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1075 if (ret)
1076 return ret;
1077 start_ep_timer(ep);
1078 __state_set(&ep->com, MPA_REQ_SENT);
1079 ep->mpa_attr.initiator = 1;
1080 ep->snd_seq += mpalen;
1081 return ret;
1082 }
1083
1084 static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen)
1085 {
1086 int mpalen, wrlen;
1087 struct fw_ofld_tx_data_wr *req;
1088 struct mpa_message *mpa;
1089 struct sk_buff *skb;
1090 struct mpa_v2_conn_params mpa_v2_params;
1091
1092 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
1093
1094 mpalen = sizeof(*mpa) + plen;
1095 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
1096 mpalen += sizeof(struct mpa_v2_conn_params);
1097 wrlen = roundup(mpalen + sizeof *req, 16);
1098
1099 skb = get_skb(NULL, wrlen, GFP_KERNEL);
1100 if (!skb) {
1101 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
1102 return -ENOMEM;
1103 }
1104 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
1105
1106 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
1107 memset(req, 0, wrlen);
1108 req->op_to_immdlen = cpu_to_be32(
1109 FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
1110 FW_WR_COMPL_F |
1111 FW_WR_IMMDLEN_V(mpalen));
1112 req->flowid_len16 = cpu_to_be32(
1113 FW_WR_FLOWID_V(ep->hwtid) |
1114 FW_WR_LEN16_V(wrlen >> 4));
1115 req->plen = cpu_to_be32(mpalen);
1116 req->tunnel_to_proxy = cpu_to_be32(
1117 FW_OFLD_TX_DATA_WR_FLUSH_F |
1118 FW_OFLD_TX_DATA_WR_SHOVE_F);
1119
1120 mpa = (struct mpa_message *)(req + 1);
1121 memset(mpa, 0, sizeof(*mpa));
1122 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
1123 mpa->flags = MPA_REJECT;
1124 mpa->revision = ep->mpa_attr.version;
1125 mpa->private_data_size = htons(plen);
1126
1127 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
1128 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
1129 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
1130 sizeof (struct mpa_v2_conn_params));
1131 mpa_v2_params.ird = htons(((u16)ep->ird) |
1132 (peer2peer ? MPA_V2_PEER2PEER_MODEL :
1133 0));
1134 mpa_v2_params.ord = htons(((u16)ep->ord) | (peer2peer ?
1135 (p2p_type ==
1136 FW_RI_INIT_P2PTYPE_RDMA_WRITE ?
1137 MPA_V2_RDMA_WRITE_RTR : p2p_type ==
1138 FW_RI_INIT_P2PTYPE_READ_REQ ?
1139 MPA_V2_RDMA_READ_RTR : 0) : 0));
1140 memcpy(mpa->private_data, &mpa_v2_params,
1141 sizeof(struct mpa_v2_conn_params));
1142
1143 if (ep->plen)
1144 memcpy(mpa->private_data +
1145 sizeof(struct mpa_v2_conn_params), pdata, plen);
1146 } else
1147 if (plen)
1148 memcpy(mpa->private_data, pdata, plen);
1149
1150 /*
1151 * Reference the mpa skb again. This ensures the data area
1152 * will remain in memory until the hw acks the tx.
1153 * Function fw4_ack() will deref it.
1154 */
1155 skb_get(skb);
1156 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
1157 t4_set_arp_err_handler(skb, NULL, mpa_start_arp_failure);
1158 BUG_ON(ep->mpa_skb);
1159 ep->mpa_skb = skb;
1160 ep->snd_seq += mpalen;
1161 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1162 }
1163
1164 static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen)
1165 {
1166 int mpalen, wrlen;
1167 struct fw_ofld_tx_data_wr *req;
1168 struct mpa_message *mpa;
1169 struct sk_buff *skb;
1170 struct mpa_v2_conn_params mpa_v2_params;
1171
1172 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
1173
1174 mpalen = sizeof(*mpa) + plen;
1175 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
1176 mpalen += sizeof(struct mpa_v2_conn_params);
1177 wrlen = roundup(mpalen + sizeof *req, 16);
1178
1179 skb = get_skb(NULL, wrlen, GFP_KERNEL);
1180 if (!skb) {
1181 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
1182 return -ENOMEM;
1183 }
1184 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
1185
1186 req = (struct fw_ofld_tx_data_wr *) skb_put(skb, wrlen);
1187 memset(req, 0, wrlen);
1188 req->op_to_immdlen = cpu_to_be32(
1189 FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
1190 FW_WR_COMPL_F |
1191 FW_WR_IMMDLEN_V(mpalen));
1192 req->flowid_len16 = cpu_to_be32(
1193 FW_WR_FLOWID_V(ep->hwtid) |
1194 FW_WR_LEN16_V(wrlen >> 4));
1195 req->plen = cpu_to_be32(mpalen);
1196 req->tunnel_to_proxy = cpu_to_be32(
1197 FW_OFLD_TX_DATA_WR_FLUSH_F |
1198 FW_OFLD_TX_DATA_WR_SHOVE_F);
1199
1200 mpa = (struct mpa_message *)(req + 1);
1201 memset(mpa, 0, sizeof(*mpa));
1202 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
1203 mpa->flags = 0;
1204 if (ep->mpa_attr.crc_enabled)
1205 mpa->flags |= MPA_CRC;
1206 if (ep->mpa_attr.recv_marker_enabled)
1207 mpa->flags |= MPA_MARKERS;
1208 mpa->revision = ep->mpa_attr.version;
1209 mpa->private_data_size = htons(plen);
1210
1211 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
1212 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
1213 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
1214 sizeof (struct mpa_v2_conn_params));
1215 mpa_v2_params.ird = htons((u16)ep->ird);
1216 mpa_v2_params.ord = htons((u16)ep->ord);
1217 if (peer2peer && (ep->mpa_attr.p2p_type !=
1218 FW_RI_INIT_P2PTYPE_DISABLED)) {
1219 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
1220
1221 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
1222 mpa_v2_params.ord |=
1223 htons(MPA_V2_RDMA_WRITE_RTR);
1224 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
1225 mpa_v2_params.ord |=
1226 htons(MPA_V2_RDMA_READ_RTR);
1227 }
1228
1229 memcpy(mpa->private_data, &mpa_v2_params,
1230 sizeof(struct mpa_v2_conn_params));
1231
1232 if (ep->plen)
1233 memcpy(mpa->private_data +
1234 sizeof(struct mpa_v2_conn_params), pdata, plen);
1235 } else
1236 if (plen)
1237 memcpy(mpa->private_data, pdata, plen);
1238
1239 /*
1240 * Reference the mpa skb. This ensures the data area
1241 * will remain in memory until the hw acks the tx.
1242 * Function fw4_ack() will deref it.
1243 */
1244 skb_get(skb);
1245 t4_set_arp_err_handler(skb, NULL, mpa_start_arp_failure);
1246 ep->mpa_skb = skb;
1247 __state_set(&ep->com, MPA_REP_SENT);
1248 ep->snd_seq += mpalen;
1249 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1250 }
1251
1252 static int act_establish(struct c4iw_dev *dev, struct sk_buff *skb)
1253 {
1254 struct c4iw_ep *ep;
1255 struct cpl_act_establish *req = cplhdr(skb);
1256 unsigned int tid = GET_TID(req);
1257 unsigned int atid = TID_TID_G(ntohl(req->tos_atid));
1258 struct tid_info *t = dev->rdev.lldi.tids;
1259 int ret;
1260
1261 ep = lookup_atid(t, atid);
1262
1263 PDBG("%s ep %p tid %u snd_isn %u rcv_isn %u\n", __func__, ep, tid,
1264 be32_to_cpu(req->snd_isn), be32_to_cpu(req->rcv_isn));
1265
1266 mutex_lock(&ep->com.mutex);
1267 dst_confirm(ep->dst);
1268
1269 /* setup the hwtid for this connection */
1270 ep->hwtid = tid;
1271 cxgb4_insert_tid(t, ep, tid);
1272 insert_ep_tid(ep);
1273
1274 ep->snd_seq = be32_to_cpu(req->snd_isn);
1275 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
1276
1277 set_emss(ep, ntohs(req->tcp_opt));
1278
1279 /* dealloc the atid */
1280 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, atid);
1281 cxgb4_free_atid(t, atid);
1282 set_bit(ACT_ESTAB, &ep->com.history);
1283
1284 /* start MPA negotiation */
1285 ret = send_flowc(ep);
1286 if (ret)
1287 goto err;
1288 if (ep->retry_with_mpa_v1)
1289 ret = send_mpa_req(ep, skb, 1);
1290 else
1291 ret = send_mpa_req(ep, skb, mpa_rev);
1292 if (ret)
1293 goto err;
1294 mutex_unlock(&ep->com.mutex);
1295 return 0;
1296 err:
1297 mutex_unlock(&ep->com.mutex);
1298 connect_reply_upcall(ep, -ENOMEM);
1299 c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
1300 return 0;
1301 }
1302
1303 static void close_complete_upcall(struct c4iw_ep *ep, int status)
1304 {
1305 struct iw_cm_event event;
1306
1307 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1308 memset(&event, 0, sizeof(event));
1309 event.event = IW_CM_EVENT_CLOSE;
1310 event.status = status;
1311 if (ep->com.cm_id) {
1312 PDBG("close complete delivered ep %p cm_id %p tid %u\n",
1313 ep, ep->com.cm_id, ep->hwtid);
1314 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1315 deref_cm_id(&ep->com);
1316 set_bit(CLOSE_UPCALL, &ep->com.history);
1317 }
1318 }
1319
1320 static void peer_close_upcall(struct c4iw_ep *ep)
1321 {
1322 struct iw_cm_event event;
1323
1324 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1325 memset(&event, 0, sizeof(event));
1326 event.event = IW_CM_EVENT_DISCONNECT;
1327 if (ep->com.cm_id) {
1328 PDBG("peer close delivered ep %p cm_id %p tid %u\n",
1329 ep, ep->com.cm_id, ep->hwtid);
1330 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1331 set_bit(DISCONN_UPCALL, &ep->com.history);
1332 }
1333 }
1334
1335 static void peer_abort_upcall(struct c4iw_ep *ep)
1336 {
1337 struct iw_cm_event event;
1338
1339 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1340 memset(&event, 0, sizeof(event));
1341 event.event = IW_CM_EVENT_CLOSE;
1342 event.status = -ECONNRESET;
1343 if (ep->com.cm_id) {
1344 PDBG("abort delivered ep %p cm_id %p tid %u\n", ep,
1345 ep->com.cm_id, ep->hwtid);
1346 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1347 deref_cm_id(&ep->com);
1348 set_bit(ABORT_UPCALL, &ep->com.history);
1349 }
1350 }
1351
1352 static void connect_reply_upcall(struct c4iw_ep *ep, int status)
1353 {
1354 struct iw_cm_event event;
1355
1356 PDBG("%s ep %p tid %u status %d\n", __func__, ep, ep->hwtid, status);
1357 memset(&event, 0, sizeof(event));
1358 event.event = IW_CM_EVENT_CONNECT_REPLY;
1359 event.status = status;
1360 memcpy(&event.local_addr, &ep->com.local_addr,
1361 sizeof(ep->com.local_addr));
1362 memcpy(&event.remote_addr, &ep->com.remote_addr,
1363 sizeof(ep->com.remote_addr));
1364
1365 if ((status == 0) || (status == -ECONNREFUSED)) {
1366 if (!ep->tried_with_mpa_v1) {
1367 /* this means MPA_v2 is used */
1368 event.ord = ep->ird;
1369 event.ird = ep->ord;
1370 event.private_data_len = ep->plen -
1371 sizeof(struct mpa_v2_conn_params);
1372 event.private_data = ep->mpa_pkt +
1373 sizeof(struct mpa_message) +
1374 sizeof(struct mpa_v2_conn_params);
1375 } else {
1376 /* this means MPA_v1 is used */
1377 event.ord = cur_max_read_depth(ep->com.dev);
1378 event.ird = cur_max_read_depth(ep->com.dev);
1379 event.private_data_len = ep->plen;
1380 event.private_data = ep->mpa_pkt +
1381 sizeof(struct mpa_message);
1382 }
1383 }
1384
1385 PDBG("%s ep %p tid %u status %d\n", __func__, ep,
1386 ep->hwtid, status);
1387 set_bit(CONN_RPL_UPCALL, &ep->com.history);
1388 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1389
1390 if (status < 0)
1391 deref_cm_id(&ep->com);
1392 }
1393
1394 static int connect_request_upcall(struct c4iw_ep *ep)
1395 {
1396 struct iw_cm_event event;
1397 int ret;
1398
1399 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1400 memset(&event, 0, sizeof(event));
1401 event.event = IW_CM_EVENT_CONNECT_REQUEST;
1402 memcpy(&event.local_addr, &ep->com.local_addr,
1403 sizeof(ep->com.local_addr));
1404 memcpy(&event.remote_addr, &ep->com.remote_addr,
1405 sizeof(ep->com.remote_addr));
1406 event.provider_data = ep;
1407 if (!ep->tried_with_mpa_v1) {
1408 /* this means MPA_v2 is used */
1409 event.ord = ep->ord;
1410 event.ird = ep->ird;
1411 event.private_data_len = ep->plen -
1412 sizeof(struct mpa_v2_conn_params);
1413 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message) +
1414 sizeof(struct mpa_v2_conn_params);
1415 } else {
1416 /* this means MPA_v1 is used. Send max supported */
1417 event.ord = cur_max_read_depth(ep->com.dev);
1418 event.ird = cur_max_read_depth(ep->com.dev);
1419 event.private_data_len = ep->plen;
1420 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
1421 }
1422 c4iw_get_ep(&ep->com);
1423 ret = ep->parent_ep->com.cm_id->event_handler(ep->parent_ep->com.cm_id,
1424 &event);
1425 if (ret)
1426 c4iw_put_ep(&ep->com);
1427 set_bit(CONNREQ_UPCALL, &ep->com.history);
1428 c4iw_put_ep(&ep->parent_ep->com);
1429 return ret;
1430 }
1431
1432 static void established_upcall(struct c4iw_ep *ep)
1433 {
1434 struct iw_cm_event event;
1435
1436 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1437 memset(&event, 0, sizeof(event));
1438 event.event = IW_CM_EVENT_ESTABLISHED;
1439 event.ird = ep->ord;
1440 event.ord = ep->ird;
1441 if (ep->com.cm_id) {
1442 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1443 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1444 set_bit(ESTAB_UPCALL, &ep->com.history);
1445 }
1446 }
1447
1448 static int update_rx_credits(struct c4iw_ep *ep, u32 credits)
1449 {
1450 struct cpl_rx_data_ack *req;
1451 struct sk_buff *skb;
1452 int wrlen = roundup(sizeof *req, 16);
1453
1454 PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
1455 skb = get_skb(NULL, wrlen, GFP_KERNEL);
1456 if (!skb) {
1457 printk(KERN_ERR MOD "update_rx_credits - cannot alloc skb!\n");
1458 return 0;
1459 }
1460
1461 /*
1462 * If we couldn't specify the entire rcv window at connection setup
1463 * due to the limit in the number of bits in the RCV_BUFSIZ field,
1464 * then add the overage in to the credits returned.
1465 */
1466 if (ep->rcv_win > RCV_BUFSIZ_M * 1024)
1467 credits += ep->rcv_win - RCV_BUFSIZ_M * 1024;
1468
1469 req = (struct cpl_rx_data_ack *) skb_put(skb, wrlen);
1470 memset(req, 0, wrlen);
1471 INIT_TP_WR(req, ep->hwtid);
1472 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
1473 ep->hwtid));
1474 req->credit_dack = cpu_to_be32(credits | RX_FORCE_ACK_F |
1475 RX_DACK_CHANGE_F |
1476 RX_DACK_MODE_V(dack_mode));
1477 set_wr_txq(skb, CPL_PRIORITY_ACK, ep->ctrlq_idx);
1478 c4iw_ofld_send(&ep->com.dev->rdev, skb);
1479 return credits;
1480 }
1481
1482 #define RELAXED_IRD_NEGOTIATION 1
1483
1484 /*
1485 * process_mpa_reply - process streaming mode MPA reply
1486 *
1487 * Returns:
1488 *
1489 * 0 upon success indicating a connect request was delivered to the ULP
1490 * or the mpa request is incomplete but valid so far.
1491 *
1492 * 1 if a failure requires the caller to close the connection.
1493 *
1494 * 2 if a failure requires the caller to abort the connection.
1495 */
1496 static int process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
1497 {
1498 struct mpa_message *mpa;
1499 struct mpa_v2_conn_params *mpa_v2_params;
1500 u16 plen;
1501 u16 resp_ird, resp_ord;
1502 u8 rtr_mismatch = 0, insuff_ird = 0;
1503 struct c4iw_qp_attributes attrs;
1504 enum c4iw_qp_attr_mask mask;
1505 int err;
1506 int disconnect = 0;
1507
1508 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1509
1510 /*
1511 * If we get more than the supported amount of private data
1512 * then we must fail this connection.
1513 */
1514 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
1515 err = -EINVAL;
1516 goto err_stop_timer;
1517 }
1518
1519 /*
1520 * copy the new data into our accumulation buffer.
1521 */
1522 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
1523 skb->len);
1524 ep->mpa_pkt_len += skb->len;
1525
1526 /*
1527 * if we don't even have the mpa message, then bail.
1528 */
1529 if (ep->mpa_pkt_len < sizeof(*mpa))
1530 return 0;
1531 mpa = (struct mpa_message *) ep->mpa_pkt;
1532
1533 /* Validate MPA header. */
1534 if (mpa->revision > mpa_rev) {
1535 printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d,"
1536 " Received = %d\n", __func__, mpa_rev, mpa->revision);
1537 err = -EPROTO;
1538 goto err_stop_timer;
1539 }
1540 if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
1541 err = -EPROTO;
1542 goto err_stop_timer;
1543 }
1544
1545 plen = ntohs(mpa->private_data_size);
1546
1547 /*
1548 * Fail if there's too much private data.
1549 */
1550 if (plen > MPA_MAX_PRIVATE_DATA) {
1551 err = -EPROTO;
1552 goto err_stop_timer;
1553 }
1554
1555 /*
1556 * If plen does not account for pkt size
1557 */
1558 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1559 err = -EPROTO;
1560 goto err_stop_timer;
1561 }
1562
1563 ep->plen = (u8) plen;
1564
1565 /*
1566 * If we don't have all the pdata yet, then bail.
1567 * We'll continue process when more data arrives.
1568 */
1569 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1570 return 0;
1571
1572 if (mpa->flags & MPA_REJECT) {
1573 err = -ECONNREFUSED;
1574 goto err_stop_timer;
1575 }
1576
1577 /*
1578 * Stop mpa timer. If it expired, then
1579 * we ignore the MPA reply. process_timeout()
1580 * will abort the connection.
1581 */
1582 if (stop_ep_timer(ep))
1583 return 0;
1584
1585 /*
1586 * If we get here we have accumulated the entire mpa
1587 * start reply message including private data. And
1588 * the MPA header is valid.
1589 */
1590 __state_set(&ep->com, FPDU_MODE);
1591 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1592 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
1593 ep->mpa_attr.version = mpa->revision;
1594 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1595
1596 if (mpa->revision == 2) {
1597 ep->mpa_attr.enhanced_rdma_conn =
1598 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
1599 if (ep->mpa_attr.enhanced_rdma_conn) {
1600 mpa_v2_params = (struct mpa_v2_conn_params *)
1601 (ep->mpa_pkt + sizeof(*mpa));
1602 resp_ird = ntohs(mpa_v2_params->ird) &
1603 MPA_V2_IRD_ORD_MASK;
1604 resp_ord = ntohs(mpa_v2_params->ord) &
1605 MPA_V2_IRD_ORD_MASK;
1606 PDBG("%s responder ird %u ord %u ep ird %u ord %u\n",
1607 __func__, resp_ird, resp_ord, ep->ird, ep->ord);
1608
1609 /*
1610 * This is a double-check. Ideally, below checks are
1611 * not required since ird/ord stuff has been taken
1612 * care of in c4iw_accept_cr
1613 */
1614 if (ep->ird < resp_ord) {
1615 if (RELAXED_IRD_NEGOTIATION && resp_ord <=
1616 ep->com.dev->rdev.lldi.max_ordird_qp)
1617 ep->ird = resp_ord;
1618 else
1619 insuff_ird = 1;
1620 } else if (ep->ird > resp_ord) {
1621 ep->ird = resp_ord;
1622 }
1623 if (ep->ord > resp_ird) {
1624 if (RELAXED_IRD_NEGOTIATION)
1625 ep->ord = resp_ird;
1626 else
1627 insuff_ird = 1;
1628 }
1629 if (insuff_ird) {
1630 err = -ENOMEM;
1631 ep->ird = resp_ord;
1632 ep->ord = resp_ird;
1633 }
1634
1635 if (ntohs(mpa_v2_params->ird) &
1636 MPA_V2_PEER2PEER_MODEL) {
1637 if (ntohs(mpa_v2_params->ord) &
1638 MPA_V2_RDMA_WRITE_RTR)
1639 ep->mpa_attr.p2p_type =
1640 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
1641 else if (ntohs(mpa_v2_params->ord) &
1642 MPA_V2_RDMA_READ_RTR)
1643 ep->mpa_attr.p2p_type =
1644 FW_RI_INIT_P2PTYPE_READ_REQ;
1645 }
1646 }
1647 } else if (mpa->revision == 1)
1648 if (peer2peer)
1649 ep->mpa_attr.p2p_type = p2p_type;
1650
1651 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
1652 "xmit_marker_enabled=%d, version=%d p2p_type=%d local-p2p_type = "
1653 "%d\n", __func__, ep->mpa_attr.crc_enabled,
1654 ep->mpa_attr.recv_marker_enabled,
1655 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1656 ep->mpa_attr.p2p_type, p2p_type);
1657
1658 /*
1659 * If responder's RTR does not match with that of initiator, assign
1660 * FW_RI_INIT_P2PTYPE_DISABLED in mpa attributes so that RTR is not
1661 * generated when moving QP to RTS state.
1662 * A TERM message will be sent after QP has moved to RTS state
1663 */
1664 if ((ep->mpa_attr.version == 2) && peer2peer &&
1665 (ep->mpa_attr.p2p_type != p2p_type)) {
1666 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1667 rtr_mismatch = 1;
1668 }
1669
1670 attrs.mpa_attr = ep->mpa_attr;
1671 attrs.max_ird = ep->ird;
1672 attrs.max_ord = ep->ord;
1673 attrs.llp_stream_handle = ep;
1674 attrs.next_state = C4IW_QP_STATE_RTS;
1675
1676 mask = C4IW_QP_ATTR_NEXT_STATE |
1677 C4IW_QP_ATTR_LLP_STREAM_HANDLE | C4IW_QP_ATTR_MPA_ATTR |
1678 C4IW_QP_ATTR_MAX_IRD | C4IW_QP_ATTR_MAX_ORD;
1679
1680 /* bind QP and TID with INIT_WR */
1681 err = c4iw_modify_qp(ep->com.qp->rhp,
1682 ep->com.qp, mask, &attrs, 1);
1683 if (err)
1684 goto err;
1685
1686 /*
1687 * If responder's RTR requirement did not match with what initiator
1688 * supports, generate TERM message
1689 */
1690 if (rtr_mismatch) {
1691 printk(KERN_ERR "%s: RTR mismatch, sending TERM\n", __func__);
1692 attrs.layer_etype = LAYER_MPA | DDP_LLP;
1693 attrs.ecode = MPA_NOMATCH_RTR;
1694 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1695 attrs.send_term = 1;
1696 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1697 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1698 err = -ENOMEM;
1699 disconnect = 1;
1700 goto out;
1701 }
1702
1703 /*
1704 * Generate TERM if initiator IRD is not sufficient for responder
1705 * provided ORD. Currently, we do the same behaviour even when
1706 * responder provided IRD is also not sufficient as regards to
1707 * initiator ORD.
1708 */
1709 if (insuff_ird) {
1710 printk(KERN_ERR "%s: Insufficient IRD, sending TERM\n",
1711 __func__);
1712 attrs.layer_etype = LAYER_MPA | DDP_LLP;
1713 attrs.ecode = MPA_INSUFF_IRD;
1714 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1715 attrs.send_term = 1;
1716 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1717 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1718 err = -ENOMEM;
1719 disconnect = 1;
1720 goto out;
1721 }
1722 goto out;
1723 err_stop_timer:
1724 stop_ep_timer(ep);
1725 err:
1726 disconnect = 2;
1727 out:
1728 connect_reply_upcall(ep, err);
1729 return disconnect;
1730 }
1731
1732 /*
1733 * process_mpa_request - process streaming mode MPA request
1734 *
1735 * Returns:
1736 *
1737 * 0 upon success indicating a connect request was delivered to the ULP
1738 * or the mpa request is incomplete but valid so far.
1739 *
1740 * 1 if a failure requires the caller to close the connection.
1741 *
1742 * 2 if a failure requires the caller to abort the connection.
1743 */
1744 static int process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb)
1745 {
1746 struct mpa_message *mpa;
1747 struct mpa_v2_conn_params *mpa_v2_params;
1748 u16 plen;
1749
1750 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1751
1752 /*
1753 * If we get more than the supported amount of private data
1754 * then we must fail this connection.
1755 */
1756 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt))
1757 goto err_stop_timer;
1758
1759 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
1760
1761 /*
1762 * Copy the new data into our accumulation buffer.
1763 */
1764 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
1765 skb->len);
1766 ep->mpa_pkt_len += skb->len;
1767
1768 /*
1769 * If we don't even have the mpa message, then bail.
1770 * We'll continue process when more data arrives.
1771 */
1772 if (ep->mpa_pkt_len < sizeof(*mpa))
1773 return 0;
1774
1775 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
1776 mpa = (struct mpa_message *) ep->mpa_pkt;
1777
1778 /*
1779 * Validate MPA Header.
1780 */
1781 if (mpa->revision > mpa_rev) {
1782 printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d,"
1783 " Received = %d\n", __func__, mpa_rev, mpa->revision);
1784 goto err_stop_timer;
1785 }
1786
1787 if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key)))
1788 goto err_stop_timer;
1789
1790 plen = ntohs(mpa->private_data_size);
1791
1792 /*
1793 * Fail if there's too much private data.
1794 */
1795 if (plen > MPA_MAX_PRIVATE_DATA)
1796 goto err_stop_timer;
1797
1798 /*
1799 * If plen does not account for pkt size
1800 */
1801 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen))
1802 goto err_stop_timer;
1803 ep->plen = (u8) plen;
1804
1805 /*
1806 * If we don't have all the pdata yet, then bail.
1807 */
1808 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1809 return 0;
1810
1811 /*
1812 * If we get here we have accumulated the entire mpa
1813 * start reply message including private data.
1814 */
1815 ep->mpa_attr.initiator = 0;
1816 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1817 ep->mpa_attr.recv_marker_enabled = markers_enabled;
1818 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
1819 ep->mpa_attr.version = mpa->revision;
1820 if (mpa->revision == 1)
1821 ep->tried_with_mpa_v1 = 1;
1822 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1823
1824 if (mpa->revision == 2) {
1825 ep->mpa_attr.enhanced_rdma_conn =
1826 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
1827 if (ep->mpa_attr.enhanced_rdma_conn) {
1828 mpa_v2_params = (struct mpa_v2_conn_params *)
1829 (ep->mpa_pkt + sizeof(*mpa));
1830 ep->ird = ntohs(mpa_v2_params->ird) &
1831 MPA_V2_IRD_ORD_MASK;
1832 ep->ird = min_t(u32, ep->ird,
1833 cur_max_read_depth(ep->com.dev));
1834 ep->ord = ntohs(mpa_v2_params->ord) &
1835 MPA_V2_IRD_ORD_MASK;
1836 ep->ord = min_t(u32, ep->ord,
1837 cur_max_read_depth(ep->com.dev));
1838 PDBG("%s initiator ird %u ord %u\n", __func__, ep->ird,
1839 ep->ord);
1840 if (ntohs(mpa_v2_params->ird) & MPA_V2_PEER2PEER_MODEL)
1841 if (peer2peer) {
1842 if (ntohs(mpa_v2_params->ord) &
1843 MPA_V2_RDMA_WRITE_RTR)
1844 ep->mpa_attr.p2p_type =
1845 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
1846 else if (ntohs(mpa_v2_params->ord) &
1847 MPA_V2_RDMA_READ_RTR)
1848 ep->mpa_attr.p2p_type =
1849 FW_RI_INIT_P2PTYPE_READ_REQ;
1850 }
1851 }
1852 } else if (mpa->revision == 1)
1853 if (peer2peer)
1854 ep->mpa_attr.p2p_type = p2p_type;
1855
1856 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
1857 "xmit_marker_enabled=%d, version=%d p2p_type=%d\n", __func__,
1858 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
1859 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1860 ep->mpa_attr.p2p_type);
1861
1862 __state_set(&ep->com, MPA_REQ_RCVD);
1863
1864 /* drive upcall */
1865 mutex_lock_nested(&ep->parent_ep->com.mutex, SINGLE_DEPTH_NESTING);
1866 if (ep->parent_ep->com.state != DEAD) {
1867 if (connect_request_upcall(ep))
1868 goto err_unlock_parent;
1869 } else {
1870 goto err_unlock_parent;
1871 }
1872 mutex_unlock(&ep->parent_ep->com.mutex);
1873 return 0;
1874
1875 err_unlock_parent:
1876 mutex_unlock(&ep->parent_ep->com.mutex);
1877 goto err_out;
1878 err_stop_timer:
1879 (void)stop_ep_timer(ep);
1880 err_out:
1881 return 2;
1882 }
1883
1884 static int rx_data(struct c4iw_dev *dev, struct sk_buff *skb)
1885 {
1886 struct c4iw_ep *ep;
1887 struct cpl_rx_data *hdr = cplhdr(skb);
1888 unsigned int dlen = ntohs(hdr->len);
1889 unsigned int tid = GET_TID(hdr);
1890 __u8 status = hdr->status;
1891 int disconnect = 0;
1892
1893 ep = get_ep_from_tid(dev, tid);
1894 if (!ep)
1895 return 0;
1896 PDBG("%s ep %p tid %u dlen %u\n", __func__, ep, ep->hwtid, dlen);
1897 skb_pull(skb, sizeof(*hdr));
1898 skb_trim(skb, dlen);
1899 mutex_lock(&ep->com.mutex);
1900
1901 /* update RX credits */
1902 update_rx_credits(ep, dlen);
1903
1904 switch (ep->com.state) {
1905 case MPA_REQ_SENT:
1906 ep->rcv_seq += dlen;
1907 disconnect = process_mpa_reply(ep, skb);
1908 break;
1909 case MPA_REQ_WAIT:
1910 ep->rcv_seq += dlen;
1911 disconnect = process_mpa_request(ep, skb);
1912 break;
1913 case FPDU_MODE: {
1914 struct c4iw_qp_attributes attrs;
1915 BUG_ON(!ep->com.qp);
1916 if (status)
1917 pr_err("%s Unexpected streaming data." \
1918 " qpid %u ep %p state %d tid %u status %d\n",
1919 __func__, ep->com.qp->wq.sq.qid, ep,
1920 ep->com.state, ep->hwtid, status);
1921 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1922 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1923 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1924 disconnect = 1;
1925 break;
1926 }
1927 default:
1928 break;
1929 }
1930 mutex_unlock(&ep->com.mutex);
1931 if (disconnect)
1932 c4iw_ep_disconnect(ep, disconnect == 2, GFP_KERNEL);
1933 c4iw_put_ep(&ep->com);
1934 return 0;
1935 }
1936
1937 static int abort_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1938 {
1939 struct c4iw_ep *ep;
1940 struct cpl_abort_rpl_rss *rpl = cplhdr(skb);
1941 int release = 0;
1942 unsigned int tid = GET_TID(rpl);
1943
1944 ep = get_ep_from_tid(dev, tid);
1945 if (!ep) {
1946 printk(KERN_WARNING MOD "Abort rpl to freed endpoint\n");
1947 return 0;
1948 }
1949 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1950 mutex_lock(&ep->com.mutex);
1951 switch (ep->com.state) {
1952 case ABORTING:
1953 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
1954 __state_set(&ep->com, DEAD);
1955 release = 1;
1956 break;
1957 default:
1958 printk(KERN_ERR "%s ep %p state %d\n",
1959 __func__, ep, ep->com.state);
1960 break;
1961 }
1962 mutex_unlock(&ep->com.mutex);
1963
1964 if (release)
1965 release_ep_resources(ep);
1966 c4iw_put_ep(&ep->com);
1967 return 0;
1968 }
1969
1970 static int send_fw_act_open_req(struct c4iw_ep *ep, unsigned int atid)
1971 {
1972 struct sk_buff *skb;
1973 struct fw_ofld_connection_wr *req;
1974 unsigned int mtu_idx;
1975 int wscale;
1976 struct sockaddr_in *sin;
1977 int win;
1978
1979 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
1980 req = (struct fw_ofld_connection_wr *)__skb_put(skb, sizeof(*req));
1981 memset(req, 0, sizeof(*req));
1982 req->op_compl = htonl(WR_OP_V(FW_OFLD_CONNECTION_WR));
1983 req->len16_pkd = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*req), 16)));
1984 req->le.filter = cpu_to_be32(cxgb4_select_ntuple(
1985 ep->com.dev->rdev.lldi.ports[0],
1986 ep->l2t));
1987 sin = (struct sockaddr_in *)&ep->com.local_addr;
1988 req->le.lport = sin->sin_port;
1989 req->le.u.ipv4.lip = sin->sin_addr.s_addr;
1990 sin = (struct sockaddr_in *)&ep->com.remote_addr;
1991 req->le.pport = sin->sin_port;
1992 req->le.u.ipv4.pip = sin->sin_addr.s_addr;
1993 req->tcb.t_state_to_astid =
1994 htonl(FW_OFLD_CONNECTION_WR_T_STATE_V(TCP_SYN_SENT) |
1995 FW_OFLD_CONNECTION_WR_ASTID_V(atid));
1996 req->tcb.cplrxdataack_cplpassacceptrpl =
1997 htons(FW_OFLD_CONNECTION_WR_CPLRXDATAACK_F);
1998 req->tcb.tx_max = (__force __be32) jiffies;
1999 req->tcb.rcv_adv = htons(1);
2000 best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
2001 enable_tcp_timestamps,
2002 (AF_INET == ep->com.remote_addr.ss_family) ? 0 : 1);
2003 wscale = compute_wscale(rcv_win);
2004
2005 /*
2006 * Specify the largest window that will fit in opt0. The
2007 * remainder will be specified in the rx_data_ack.
2008 */
2009 win = ep->rcv_win >> 10;
2010 if (win > RCV_BUFSIZ_M)
2011 win = RCV_BUFSIZ_M;
2012
2013 req->tcb.opt0 = (__force __be64) (TCAM_BYPASS_F |
2014 (nocong ? NO_CONG_F : 0) |
2015 KEEP_ALIVE_F |
2016 DELACK_F |
2017 WND_SCALE_V(wscale) |
2018 MSS_IDX_V(mtu_idx) |
2019 L2T_IDX_V(ep->l2t->idx) |
2020 TX_CHAN_V(ep->tx_chan) |
2021 SMAC_SEL_V(ep->smac_idx) |
2022 DSCP_V(ep->tos >> 2) |
2023 ULP_MODE_V(ULP_MODE_TCPDDP) |
2024 RCV_BUFSIZ_V(win));
2025 req->tcb.opt2 = (__force __be32) (PACE_V(1) |
2026 TX_QUEUE_V(ep->com.dev->rdev.lldi.tx_modq[ep->tx_chan]) |
2027 RX_CHANNEL_V(0) |
2028 CCTRL_ECN_V(enable_ecn) |
2029 RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid));
2030 if (enable_tcp_timestamps)
2031 req->tcb.opt2 |= (__force __be32)TSTAMPS_EN_F;
2032 if (enable_tcp_sack)
2033 req->tcb.opt2 |= (__force __be32)SACK_EN_F;
2034 if (wscale && enable_tcp_window_scaling)
2035 req->tcb.opt2 |= (__force __be32)WND_SCALE_EN_F;
2036 req->tcb.opt0 = cpu_to_be64((__force u64)req->tcb.opt0);
2037 req->tcb.opt2 = cpu_to_be32((__force u32)req->tcb.opt2);
2038 set_wr_txq(skb, CPL_PRIORITY_CONTROL, ep->ctrlq_idx);
2039 set_bit(ACT_OFLD_CONN, &ep->com.history);
2040 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
2041 }
2042
2043 /*
2044 * Some of the error codes above implicitly indicate that there is no TID
2045 * allocated with the result of an ACT_OPEN. We use this predicate to make
2046 * that explicit.
2047 */
2048 static inline int act_open_has_tid(int status)
2049 {
2050 return (status != CPL_ERR_TCAM_PARITY &&
2051 status != CPL_ERR_TCAM_MISS &&
2052 status != CPL_ERR_TCAM_FULL &&
2053 status != CPL_ERR_CONN_EXIST_SYNRECV &&
2054 status != CPL_ERR_CONN_EXIST);
2055 }
2056
2057 /* Returns whether a CPL status conveys negative advice.
2058 */
2059 static int is_neg_adv(unsigned int status)
2060 {
2061 return status == CPL_ERR_RTX_NEG_ADVICE ||
2062 status == CPL_ERR_PERSIST_NEG_ADVICE ||
2063 status == CPL_ERR_KEEPALV_NEG_ADVICE;
2064 }
2065
2066 static char *neg_adv_str(unsigned int status)
2067 {
2068 switch (status) {
2069 case CPL_ERR_RTX_NEG_ADVICE:
2070 return "Retransmit timeout";
2071 case CPL_ERR_PERSIST_NEG_ADVICE:
2072 return "Persist timeout";
2073 case CPL_ERR_KEEPALV_NEG_ADVICE:
2074 return "Keepalive timeout";
2075 default:
2076 return "Unknown";
2077 }
2078 }
2079
2080 static void set_tcp_window(struct c4iw_ep *ep, struct port_info *pi)
2081 {
2082 ep->snd_win = snd_win;
2083 ep->rcv_win = rcv_win;
2084 PDBG("%s snd_win %d rcv_win %d\n", __func__, ep->snd_win, ep->rcv_win);
2085 }
2086
2087 #define ACT_OPEN_RETRY_COUNT 2
2088
2089 static int import_ep(struct c4iw_ep *ep, int iptype, __u8 *peer_ip,
2090 struct dst_entry *dst, struct c4iw_dev *cdev,
2091 bool clear_mpa_v1, enum chip_type adapter_type, u8 tos)
2092 {
2093 struct neighbour *n;
2094 int err, step;
2095 struct net_device *pdev;
2096
2097 n = dst_neigh_lookup(dst, peer_ip);
2098 if (!n)
2099 return -ENODEV;
2100
2101 rcu_read_lock();
2102 err = -ENOMEM;
2103 if (n->dev->flags & IFF_LOOPBACK) {
2104 if (iptype == 4)
2105 pdev = ip_dev_find(&init_net, *(__be32 *)peer_ip);
2106 else if (IS_ENABLED(CONFIG_IPV6))
2107 for_each_netdev(&init_net, pdev) {
2108 if (ipv6_chk_addr(&init_net,
2109 (struct in6_addr *)peer_ip,
2110 pdev, 1))
2111 break;
2112 }
2113 else
2114 pdev = NULL;
2115
2116 if (!pdev) {
2117 err = -ENODEV;
2118 goto out;
2119 }
2120 ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
2121 n, pdev, rt_tos2priority(tos));
2122 if (!ep->l2t) {
2123 dev_put(pdev);
2124 goto out;
2125 }
2126 ep->mtu = pdev->mtu;
2127 ep->tx_chan = cxgb4_port_chan(pdev);
2128 ep->smac_idx = cxgb4_tp_smt_idx(adapter_type,
2129 cxgb4_port_viid(pdev));
2130 step = cdev->rdev.lldi.ntxq /
2131 cdev->rdev.lldi.nchan;
2132 ep->txq_idx = cxgb4_port_idx(pdev) * step;
2133 step = cdev->rdev.lldi.nrxq /
2134 cdev->rdev.lldi.nchan;
2135 ep->ctrlq_idx = cxgb4_port_idx(pdev);
2136 ep->rss_qid = cdev->rdev.lldi.rxq_ids[
2137 cxgb4_port_idx(pdev) * step];
2138 set_tcp_window(ep, (struct port_info *)netdev_priv(pdev));
2139 dev_put(pdev);
2140 } else {
2141 pdev = get_real_dev(n->dev);
2142 ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
2143 n, pdev, 0);
2144 if (!ep->l2t)
2145 goto out;
2146 ep->mtu = dst_mtu(dst);
2147 ep->tx_chan = cxgb4_port_chan(pdev);
2148 ep->smac_idx = cxgb4_tp_smt_idx(adapter_type,
2149 cxgb4_port_viid(pdev));
2150 step = cdev->rdev.lldi.ntxq /
2151 cdev->rdev.lldi.nchan;
2152 ep->txq_idx = cxgb4_port_idx(pdev) * step;
2153 ep->ctrlq_idx = cxgb4_port_idx(pdev);
2154 step = cdev->rdev.lldi.nrxq /
2155 cdev->rdev.lldi.nchan;
2156 ep->rss_qid = cdev->rdev.lldi.rxq_ids[
2157 cxgb4_port_idx(pdev) * step];
2158 set_tcp_window(ep, (struct port_info *)netdev_priv(pdev));
2159
2160 if (clear_mpa_v1) {
2161 ep->retry_with_mpa_v1 = 0;
2162 ep->tried_with_mpa_v1 = 0;
2163 }
2164 }
2165 err = 0;
2166 out:
2167 rcu_read_unlock();
2168
2169 neigh_release(n);
2170
2171 return err;
2172 }
2173
2174 static int c4iw_reconnect(struct c4iw_ep *ep)
2175 {
2176 int err = 0;
2177 int size = 0;
2178 struct sockaddr_in *laddr = (struct sockaddr_in *)
2179 &ep->com.cm_id->m_local_addr;
2180 struct sockaddr_in *raddr = (struct sockaddr_in *)
2181 &ep->com.cm_id->m_remote_addr;
2182 struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)
2183 &ep->com.cm_id->m_local_addr;
2184 struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)
2185 &ep->com.cm_id->m_remote_addr;
2186 int iptype;
2187 __u8 *ra;
2188
2189 PDBG("%s qp %p cm_id %p\n", __func__, ep->com.qp, ep->com.cm_id);
2190 init_timer(&ep->timer);
2191 c4iw_init_wr_wait(&ep->com.wr_wait);
2192
2193 /* When MPA revision is different on nodes, the node with MPA_rev=2
2194 * tries to reconnect with MPA_rev 1 for the same EP through
2195 * c4iw_reconnect(), where the same EP is assigned with new tid for
2196 * further connection establishment. As we are using the same EP pointer
2197 * for reconnect, few skbs are used during the previous c4iw_connect(),
2198 * which leaves the EP with inadequate skbs for further
2199 * c4iw_reconnect(), Further causing an assert BUG_ON() due to empty
2200 * skb_list() during peer_abort(). Allocate skbs which is already used.
2201 */
2202 size = (CN_MAX_CON_BUF - skb_queue_len(&ep->com.ep_skb_list));
2203 if (alloc_ep_skb_list(&ep->com.ep_skb_list, size)) {
2204 err = -ENOMEM;
2205 goto fail1;
2206 }
2207
2208 /*
2209 * Allocate an active TID to initiate a TCP connection.
2210 */
2211 ep->atid = cxgb4_alloc_atid(ep->com.dev->rdev.lldi.tids, ep);
2212 if (ep->atid == -1) {
2213 pr_err("%s - cannot alloc atid.\n", __func__);
2214 err = -ENOMEM;
2215 goto fail2;
2216 }
2217 insert_handle(ep->com.dev, &ep->com.dev->atid_idr, ep, ep->atid);
2218
2219 /* find a route */
2220 if (ep->com.cm_id->m_local_addr.ss_family == AF_INET) {
2221 ep->dst = find_route(ep->com.dev, laddr->sin_addr.s_addr,
2222 raddr->sin_addr.s_addr, laddr->sin_port,
2223 raddr->sin_port, ep->com.cm_id->tos);
2224 iptype = 4;
2225 ra = (__u8 *)&raddr->sin_addr;
2226 } else {
2227 ep->dst = find_route6(ep->com.dev, laddr6->sin6_addr.s6_addr,
2228 raddr6->sin6_addr.s6_addr,
2229 laddr6->sin6_port, raddr6->sin6_port, 0,
2230 raddr6->sin6_scope_id);
2231 iptype = 6;
2232 ra = (__u8 *)&raddr6->sin6_addr;
2233 }
2234 if (!ep->dst) {
2235 pr_err("%s - cannot find route.\n", __func__);
2236 err = -EHOSTUNREACH;
2237 goto fail3;
2238 }
2239 err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, false,
2240 ep->com.dev->rdev.lldi.adapter_type,
2241 ep->com.cm_id->tos);
2242 if (err) {
2243 pr_err("%s - cannot alloc l2e.\n", __func__);
2244 goto fail4;
2245 }
2246
2247 PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
2248 __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
2249 ep->l2t->idx);
2250
2251 state_set(&ep->com, CONNECTING);
2252 ep->tos = ep->com.cm_id->tos;
2253
2254 /* send connect request to rnic */
2255 err = send_connect(ep);
2256 if (!err)
2257 goto out;
2258
2259 cxgb4_l2t_release(ep->l2t);
2260 fail4:
2261 dst_release(ep->dst);
2262 fail3:
2263 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
2264 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
2265 fail2:
2266 /*
2267 * remember to send notification to upper layer.
2268 * We are in here so the upper layer is not aware that this is
2269 * re-connect attempt and so, upper layer is still waiting for
2270 * response of 1st connect request.
2271 */
2272 connect_reply_upcall(ep, -ECONNRESET);
2273 fail1:
2274 c4iw_put_ep(&ep->com);
2275 out:
2276 return err;
2277 }
2278
2279 static int act_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2280 {
2281 struct c4iw_ep *ep;
2282 struct cpl_act_open_rpl *rpl = cplhdr(skb);
2283 unsigned int atid = TID_TID_G(AOPEN_ATID_G(
2284 ntohl(rpl->atid_status)));
2285 struct tid_info *t = dev->rdev.lldi.tids;
2286 int status = AOPEN_STATUS_G(ntohl(rpl->atid_status));
2287 struct sockaddr_in *la;
2288 struct sockaddr_in *ra;
2289 struct sockaddr_in6 *la6;
2290 struct sockaddr_in6 *ra6;
2291 int ret = 0;
2292
2293 ep = lookup_atid(t, atid);
2294 la = (struct sockaddr_in *)&ep->com.local_addr;
2295 ra = (struct sockaddr_in *)&ep->com.remote_addr;
2296 la6 = (struct sockaddr_in6 *)&ep->com.local_addr;
2297 ra6 = (struct sockaddr_in6 *)&ep->com.remote_addr;
2298
2299 PDBG("%s ep %p atid %u status %u errno %d\n", __func__, ep, atid,
2300 status, status2errno(status));
2301
2302 if (is_neg_adv(status)) {
2303 PDBG("%s Connection problems for atid %u status %u (%s)\n",
2304 __func__, atid, status, neg_adv_str(status));
2305 ep->stats.connect_neg_adv++;
2306 mutex_lock(&dev->rdev.stats.lock);
2307 dev->rdev.stats.neg_adv++;
2308 mutex_unlock(&dev->rdev.stats.lock);
2309 return 0;
2310 }
2311
2312 set_bit(ACT_OPEN_RPL, &ep->com.history);
2313
2314 /*
2315 * Log interesting failures.
2316 */
2317 switch (status) {
2318 case CPL_ERR_CONN_RESET:
2319 case CPL_ERR_CONN_TIMEDOUT:
2320 break;
2321 case CPL_ERR_TCAM_FULL:
2322 mutex_lock(&dev->rdev.stats.lock);
2323 dev->rdev.stats.tcam_full++;
2324 mutex_unlock(&dev->rdev.stats.lock);
2325 if (ep->com.local_addr.ss_family == AF_INET &&
2326 dev->rdev.lldi.enable_fw_ofld_conn) {
2327 ret = send_fw_act_open_req(ep, TID_TID_G(AOPEN_ATID_G(
2328 ntohl(rpl->atid_status))));
2329 if (ret)
2330 goto fail;
2331 return 0;
2332 }
2333 break;
2334 case CPL_ERR_CONN_EXIST:
2335 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
2336 set_bit(ACT_RETRY_INUSE, &ep->com.history);
2337 if (ep->com.remote_addr.ss_family == AF_INET6) {
2338 struct sockaddr_in6 *sin6 =
2339 (struct sockaddr_in6 *)
2340 &ep->com.local_addr;
2341 cxgb4_clip_release(
2342 ep->com.dev->rdev.lldi.ports[0],
2343 (const u32 *)
2344 &sin6->sin6_addr.s6_addr, 1);
2345 }
2346 remove_handle(ep->com.dev, &ep->com.dev->atid_idr,
2347 atid);
2348 cxgb4_free_atid(t, atid);
2349 dst_release(ep->dst);
2350 cxgb4_l2t_release(ep->l2t);
2351 c4iw_reconnect(ep);
2352 return 0;
2353 }
2354 break;
2355 default:
2356 if (ep->com.local_addr.ss_family == AF_INET) {
2357 pr_info("Active open failure - atid %u status %u errno %d %pI4:%u->%pI4:%u\n",
2358 atid, status, status2errno(status),
2359 &la->sin_addr.s_addr, ntohs(la->sin_port),
2360 &ra->sin_addr.s_addr, ntohs(ra->sin_port));
2361 } else {
2362 pr_info("Active open failure - atid %u status %u errno %d %pI6:%u->%pI6:%u\n",
2363 atid, status, status2errno(status),
2364 la6->sin6_addr.s6_addr, ntohs(la6->sin6_port),
2365 ra6->sin6_addr.s6_addr, ntohs(ra6->sin6_port));
2366 }
2367 break;
2368 }
2369
2370 fail:
2371 connect_reply_upcall(ep, status2errno(status));
2372 state_set(&ep->com, DEAD);
2373
2374 if (ep->com.remote_addr.ss_family == AF_INET6) {
2375 struct sockaddr_in6 *sin6 =
2376 (struct sockaddr_in6 *)&ep->com.local_addr;
2377 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
2378 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
2379 }
2380 if (status && act_open_has_tid(status))
2381 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, GET_TID(rpl));
2382
2383 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, atid);
2384 cxgb4_free_atid(t, atid);
2385 dst_release(ep->dst);
2386 cxgb4_l2t_release(ep->l2t);
2387 c4iw_put_ep(&ep->com);
2388
2389 return 0;
2390 }
2391
2392 static int pass_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2393 {
2394 struct cpl_pass_open_rpl *rpl = cplhdr(skb);
2395 unsigned int stid = GET_TID(rpl);
2396 struct c4iw_listen_ep *ep = get_ep_from_stid(dev, stid);
2397
2398 if (!ep) {
2399 PDBG("%s stid %d lookup failure!\n", __func__, stid);
2400 goto out;
2401 }
2402 PDBG("%s ep %p status %d error %d\n", __func__, ep,
2403 rpl->status, status2errno(rpl->status));
2404 c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
2405 c4iw_put_ep(&ep->com);
2406 out:
2407 return 0;
2408 }
2409
2410 static int close_listsrv_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2411 {
2412 struct cpl_close_listsvr_rpl *rpl = cplhdr(skb);
2413 unsigned int stid = GET_TID(rpl);
2414 struct c4iw_listen_ep *ep = get_ep_from_stid(dev, stid);
2415
2416 PDBG("%s ep %p\n", __func__, ep);
2417 c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
2418 c4iw_put_ep(&ep->com);
2419 return 0;
2420 }
2421
2422 static int accept_cr(struct c4iw_ep *ep, struct sk_buff *skb,
2423 struct cpl_pass_accept_req *req)
2424 {
2425 struct cpl_pass_accept_rpl *rpl;
2426 unsigned int mtu_idx;
2427 u64 opt0;
2428 u32 opt2;
2429 int wscale;
2430 struct cpl_t5_pass_accept_rpl *rpl5 = NULL;
2431 int win;
2432 enum chip_type adapter_type = ep->com.dev->rdev.lldi.adapter_type;
2433
2434 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2435 BUG_ON(skb_cloned(skb));
2436
2437 skb_get(skb);
2438 rpl = cplhdr(skb);
2439 if (!is_t4(adapter_type)) {
2440 skb_trim(skb, roundup(sizeof(*rpl5), 16));
2441 rpl5 = (void *)rpl;
2442 INIT_TP_WR(rpl5, ep->hwtid);
2443 } else {
2444 skb_trim(skb, sizeof(*rpl));
2445 INIT_TP_WR(rpl, ep->hwtid);
2446 }
2447 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
2448 ep->hwtid));
2449
2450 best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
2451 enable_tcp_timestamps && req->tcpopt.tstamp,
2452 (AF_INET == ep->com.remote_addr.ss_family) ? 0 : 1);
2453 wscale = compute_wscale(rcv_win);
2454
2455 /*
2456 * Specify the largest window that will fit in opt0. The
2457 * remainder will be specified in the rx_data_ack.
2458 */
2459 win = ep->rcv_win >> 10;
2460 if (win > RCV_BUFSIZ_M)
2461 win = RCV_BUFSIZ_M;
2462 opt0 = (nocong ? NO_CONG_F : 0) |
2463 KEEP_ALIVE_F |
2464 DELACK_F |
2465 WND_SCALE_V(wscale) |
2466 MSS_IDX_V(mtu_idx) |
2467 L2T_IDX_V(ep->l2t->idx) |
2468 TX_CHAN_V(ep->tx_chan) |
2469 SMAC_SEL_V(ep->smac_idx) |
2470 DSCP_V(ep->tos >> 2) |
2471 ULP_MODE_V(ULP_MODE_TCPDDP) |
2472 RCV_BUFSIZ_V(win);
2473 opt2 = RX_CHANNEL_V(0) |
2474 RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid);
2475
2476 if (enable_tcp_timestamps && req->tcpopt.tstamp)
2477 opt2 |= TSTAMPS_EN_F;
2478 if (enable_tcp_sack && req->tcpopt.sack)
2479 opt2 |= SACK_EN_F;
2480 if (wscale && enable_tcp_window_scaling)
2481 opt2 |= WND_SCALE_EN_F;
2482 if (enable_ecn) {
2483 const struct tcphdr *tcph;
2484 u32 hlen = ntohl(req->hdr_len);
2485
2486 if (CHELSIO_CHIP_VERSION(adapter_type) <= CHELSIO_T5)
2487 tcph = (const void *)(req + 1) + ETH_HDR_LEN_G(hlen) +
2488 IP_HDR_LEN_G(hlen);
2489 else
2490 tcph = (const void *)(req + 1) +
2491 T6_ETH_HDR_LEN_G(hlen) + T6_IP_HDR_LEN_G(hlen);
2492 if (tcph->ece && tcph->cwr)
2493 opt2 |= CCTRL_ECN_V(1);
2494 }
2495 if (CHELSIO_CHIP_VERSION(adapter_type) > CHELSIO_T4) {
2496 u32 isn = (prandom_u32() & ~7UL) - 1;
2497 opt2 |= T5_OPT_2_VALID_F;
2498 opt2 |= CONG_CNTRL_V(CONG_ALG_TAHOE);
2499 opt2 |= T5_ISS_F;
2500 rpl5 = (void *)rpl;
2501 memset(&rpl5->iss, 0, roundup(sizeof(*rpl5)-sizeof(*rpl), 16));
2502 if (peer2peer)
2503 isn += 4;
2504 rpl5->iss = cpu_to_be32(isn);
2505 PDBG("%s iss %u\n", __func__, be32_to_cpu(rpl5->iss));
2506 }
2507
2508 rpl->opt0 = cpu_to_be64(opt0);
2509 rpl->opt2 = cpu_to_be32(opt2);
2510 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
2511 t4_set_arp_err_handler(skb, ep, pass_accept_rpl_arp_failure);
2512
2513 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
2514 }
2515
2516 static void reject_cr(struct c4iw_dev *dev, u32 hwtid, struct sk_buff *skb)
2517 {
2518 PDBG("%s c4iw_dev %p tid %u\n", __func__, dev, hwtid);
2519 BUG_ON(skb_cloned(skb));
2520 skb_trim(skb, sizeof(struct cpl_tid_release));
2521 release_tid(&dev->rdev, hwtid, skb);
2522 return;
2523 }
2524
2525 static void get_4tuple(struct cpl_pass_accept_req *req, enum chip_type type,
2526 int *iptype, __u8 *local_ip, __u8 *peer_ip,
2527 __be16 *local_port, __be16 *peer_port)
2528 {
2529 int eth_len = (CHELSIO_CHIP_VERSION(type) <= CHELSIO_T5) ?
2530 ETH_HDR_LEN_G(be32_to_cpu(req->hdr_len)) :
2531 T6_ETH_HDR_LEN_G(be32_to_cpu(req->hdr_len));
2532 int ip_len = (CHELSIO_CHIP_VERSION(type) <= CHELSIO_T5) ?
2533 IP_HDR_LEN_G(be32_to_cpu(req->hdr_len)) :
2534 T6_IP_HDR_LEN_G(be32_to_cpu(req->hdr_len));
2535 struct iphdr *ip = (struct iphdr *)((u8 *)(req + 1) + eth_len);
2536 struct ipv6hdr *ip6 = (struct ipv6hdr *)((u8 *)(req + 1) + eth_len);
2537 struct tcphdr *tcp = (struct tcphdr *)
2538 ((u8 *)(req + 1) + eth_len + ip_len);
2539
2540 if (ip->version == 4) {
2541 PDBG("%s saddr 0x%x daddr 0x%x sport %u dport %u\n", __func__,
2542 ntohl(ip->saddr), ntohl(ip->daddr), ntohs(tcp->source),
2543 ntohs(tcp->dest));
2544 *iptype = 4;
2545 memcpy(peer_ip, &ip->saddr, 4);
2546 memcpy(local_ip, &ip->daddr, 4);
2547 } else {
2548 PDBG("%s saddr %pI6 daddr %pI6 sport %u dport %u\n", __func__,
2549 ip6->saddr.s6_addr, ip6->daddr.s6_addr, ntohs(tcp->source),
2550 ntohs(tcp->dest));
2551 *iptype = 6;
2552 memcpy(peer_ip, ip6->saddr.s6_addr, 16);
2553 memcpy(local_ip, ip6->daddr.s6_addr, 16);
2554 }
2555 *peer_port = tcp->source;
2556 *local_port = tcp->dest;
2557
2558 return;
2559 }
2560
2561 static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb)
2562 {
2563 struct c4iw_ep *child_ep = NULL, *parent_ep;
2564 struct cpl_pass_accept_req *req = cplhdr(skb);
2565 unsigned int stid = PASS_OPEN_TID_G(ntohl(req->tos_stid));
2566 struct tid_info *t = dev->rdev.lldi.tids;
2567 unsigned int hwtid = GET_TID(req);
2568 struct dst_entry *dst;
2569 __u8 local_ip[16], peer_ip[16];
2570 __be16 local_port, peer_port;
2571 struct sockaddr_in6 *sin6;
2572 int err;
2573 u16 peer_mss = ntohs(req->tcpopt.mss);
2574 int iptype;
2575 unsigned short hdrs;
2576 u8 tos = PASS_OPEN_TOS_G(ntohl(req->tos_stid));
2577
2578 parent_ep = (struct c4iw_ep *)get_ep_from_stid(dev, stid);
2579 if (!parent_ep) {
2580 PDBG("%s connect request on invalid stid %d\n", __func__, stid);
2581 goto reject;
2582 }
2583
2584 if (state_read(&parent_ep->com) != LISTEN) {
2585 PDBG("%s - listening ep not in LISTEN\n", __func__);
2586 goto reject;
2587 }
2588
2589 get_4tuple(req, parent_ep->com.dev->rdev.lldi.adapter_type, &iptype,
2590 local_ip, peer_ip, &local_port, &peer_port);
2591
2592 /* Find output route */
2593 if (iptype == 4) {
2594 PDBG("%s parent ep %p hwtid %u laddr %pI4 raddr %pI4 lport %d rport %d peer_mss %d\n"
2595 , __func__, parent_ep, hwtid,
2596 local_ip, peer_ip, ntohs(local_port),
2597 ntohs(peer_port), peer_mss);
2598 dst = find_route(dev, *(__be32 *)local_ip, *(__be32 *)peer_ip,
2599 local_port, peer_port,
2600 tos);
2601 } else {
2602 PDBG("%s parent ep %p hwtid %u laddr %pI6 raddr %pI6 lport %d rport %d peer_mss %d\n"
2603 , __func__, parent_ep, hwtid,
2604 local_ip, peer_ip, ntohs(local_port),
2605 ntohs(peer_port), peer_mss);
2606 dst = find_route6(dev, local_ip, peer_ip, local_port, peer_port,
2607 PASS_OPEN_TOS_G(ntohl(req->tos_stid)),
2608 ((struct sockaddr_in6 *)
2609 &parent_ep->com.local_addr)->sin6_scope_id);
2610 }
2611 if (!dst) {
2612 printk(KERN_ERR MOD "%s - failed to find dst entry!\n",
2613 __func__);
2614 goto reject;
2615 }
2616
2617 child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL);
2618 if (!child_ep) {
2619 printk(KERN_ERR MOD "%s - failed to allocate ep entry!\n",
2620 __func__);
2621 dst_release(dst);
2622 goto reject;
2623 }
2624
2625 err = import_ep(child_ep, iptype, peer_ip, dst, dev, false,
2626 parent_ep->com.dev->rdev.lldi.adapter_type, tos);
2627 if (err) {
2628 printk(KERN_ERR MOD "%s - failed to allocate l2t entry!\n",
2629 __func__);
2630 dst_release(dst);
2631 kfree(child_ep);
2632 goto reject;
2633 }
2634
2635 hdrs = sizeof(struct iphdr) + sizeof(struct tcphdr) +
2636 ((enable_tcp_timestamps && req->tcpopt.tstamp) ? 12 : 0);
2637 if (peer_mss && child_ep->mtu > (peer_mss + hdrs))
2638 child_ep->mtu = peer_mss + hdrs;
2639
2640 skb_queue_head_init(&child_ep->com.ep_skb_list);
2641 if (alloc_ep_skb_list(&child_ep->com.ep_skb_list, CN_MAX_CON_BUF))
2642 goto fail;
2643
2644 state_set(&child_ep->com, CONNECTING);
2645 child_ep->com.dev = dev;
2646 child_ep->com.cm_id = NULL;
2647
2648 if (iptype == 4) {
2649 struct sockaddr_in *sin = (struct sockaddr_in *)
2650 &child_ep->com.local_addr;
2651
2652 sin->sin_family = PF_INET;
2653 sin->sin_port = local_port;
2654 sin->sin_addr.s_addr = *(__be32 *)local_ip;
2655
2656 sin = (struct sockaddr_in *)&child_ep->com.local_addr;
2657 sin->sin_family = PF_INET;
2658 sin->sin_port = ((struct sockaddr_in *)
2659 &parent_ep->com.local_addr)->sin_port;
2660 sin->sin_addr.s_addr = *(__be32 *)local_ip;
2661
2662 sin = (struct sockaddr_in *)&child_ep->com.remote_addr;
2663 sin->sin_family = PF_INET;
2664 sin->sin_port = peer_port;
2665 sin->sin_addr.s_addr = *(__be32 *)peer_ip;
2666 } else {
2667 sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr;
2668 sin6->sin6_family = PF_INET6;
2669 sin6->sin6_port = local_port;
2670 memcpy(sin6->sin6_addr.s6_addr, local_ip, 16);
2671
2672 sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr;
2673 sin6->sin6_family = PF_INET6;
2674 sin6->sin6_port = ((struct sockaddr_in6 *)
2675 &parent_ep->com.local_addr)->sin6_port;
2676 memcpy(sin6->sin6_addr.s6_addr, local_ip, 16);
2677
2678 sin6 = (struct sockaddr_in6 *)&child_ep->com.remote_addr;
2679 sin6->sin6_family = PF_INET6;
2680 sin6->sin6_port = peer_port;
2681 memcpy(sin6->sin6_addr.s6_addr, peer_ip, 16);
2682 }
2683
2684 c4iw_get_ep(&parent_ep->com);
2685 child_ep->parent_ep = parent_ep;
2686 child_ep->tos = tos;
2687 child_ep->dst = dst;
2688 child_ep->hwtid = hwtid;
2689
2690 PDBG("%s tx_chan %u smac_idx %u rss_qid %u\n", __func__,
2691 child_ep->tx_chan, child_ep->smac_idx, child_ep->rss_qid);
2692
2693 init_timer(&child_ep->timer);
2694 cxgb4_insert_tid(t, child_ep, hwtid);
2695 insert_ep_tid(child_ep);
2696 if (accept_cr(child_ep, skb, req)) {
2697 c4iw_put_ep(&parent_ep->com);
2698 release_ep_resources(child_ep);
2699 } else {
2700 set_bit(PASS_ACCEPT_REQ, &child_ep->com.history);
2701 }
2702 if (iptype == 6) {
2703 sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr;
2704 cxgb4_clip_get(child_ep->com.dev->rdev.lldi.ports[0],
2705 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
2706 }
2707 goto out;
2708 fail:
2709 c4iw_put_ep(&child_ep->com);
2710 reject:
2711 reject_cr(dev, hwtid, skb);
2712 if (parent_ep)
2713 c4iw_put_ep(&parent_ep->com);
2714 out:
2715 return 0;
2716 }
2717
2718 static int pass_establish(struct c4iw_dev *dev, struct sk_buff *skb)
2719 {
2720 struct c4iw_ep *ep;
2721 struct cpl_pass_establish *req = cplhdr(skb);
2722 unsigned int tid = GET_TID(req);
2723 int ret;
2724
2725 ep = get_ep_from_tid(dev, tid);
2726 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2727 ep->snd_seq = be32_to_cpu(req->snd_isn);
2728 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
2729
2730 PDBG("%s ep %p hwtid %u tcp_opt 0x%02x\n", __func__, ep, tid,
2731 ntohs(req->tcp_opt));
2732
2733 set_emss(ep, ntohs(req->tcp_opt));
2734
2735 dst_confirm(ep->dst);
2736 mutex_lock(&ep->com.mutex);
2737 ep->com.state = MPA_REQ_WAIT;
2738 start_ep_timer(ep);
2739 set_bit(PASS_ESTAB, &ep->com.history);
2740 ret = send_flowc(ep);
2741 mutex_unlock(&ep->com.mutex);
2742 if (ret)
2743 c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
2744 c4iw_put_ep(&ep->com);
2745
2746 return 0;
2747 }
2748
2749 static int peer_close(struct c4iw_dev *dev, struct sk_buff *skb)
2750 {
2751 struct cpl_peer_close *hdr = cplhdr(skb);
2752 struct c4iw_ep *ep;
2753 struct c4iw_qp_attributes attrs;
2754 int disconnect = 1;
2755 int release = 0;
2756 unsigned int tid = GET_TID(hdr);
2757 int ret;
2758
2759 ep = get_ep_from_tid(dev, tid);
2760 if (!ep)
2761 return 0;
2762
2763 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2764 dst_confirm(ep->dst);
2765
2766 set_bit(PEER_CLOSE, &ep->com.history);
2767 mutex_lock(&ep->com.mutex);
2768 switch (ep->com.state) {
2769 case MPA_REQ_WAIT:
2770 __state_set(&ep->com, CLOSING);
2771 break;
2772 case MPA_REQ_SENT:
2773 __state_set(&ep->com, CLOSING);
2774 connect_reply_upcall(ep, -ECONNRESET);
2775 break;
2776 case MPA_REQ_RCVD:
2777
2778 /*
2779 * We're gonna mark this puppy DEAD, but keep
2780 * the reference on it until the ULP accepts or
2781 * rejects the CR. Also wake up anyone waiting
2782 * in rdma connection migration (see c4iw_accept_cr()).
2783 */
2784 __state_set(&ep->com, CLOSING);
2785 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
2786 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2787 break;
2788 case MPA_REP_SENT:
2789 __state_set(&ep->com, CLOSING);
2790 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
2791 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2792 break;
2793 case FPDU_MODE:
2794 start_ep_timer(ep);
2795 __state_set(&ep->com, CLOSING);
2796 attrs.next_state = C4IW_QP_STATE_CLOSING;
2797 ret = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2798 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2799 if (ret != -ECONNRESET) {
2800 peer_close_upcall(ep);
2801 disconnect = 1;
2802 }
2803 break;
2804 case ABORTING:
2805 disconnect = 0;
2806 break;
2807 case CLOSING:
2808 __state_set(&ep->com, MORIBUND);
2809 disconnect = 0;
2810 break;
2811 case MORIBUND:
2812 (void)stop_ep_timer(ep);
2813 if (ep->com.cm_id && ep->com.qp) {
2814 attrs.next_state = C4IW_QP_STATE_IDLE;
2815 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2816 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2817 }
2818 close_complete_upcall(ep, 0);
2819 __state_set(&ep->com, DEAD);
2820 release = 1;
2821 disconnect = 0;
2822 break;
2823 case DEAD:
2824 disconnect = 0;
2825 break;
2826 default:
2827 BUG_ON(1);
2828 }
2829 mutex_unlock(&ep->com.mutex);
2830 if (disconnect)
2831 c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
2832 if (release)
2833 release_ep_resources(ep);
2834 c4iw_put_ep(&ep->com);
2835 return 0;
2836 }
2837
2838 static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb)
2839 {
2840 struct cpl_abort_req_rss *req = cplhdr(skb);
2841 struct c4iw_ep *ep;
2842 struct cpl_abort_rpl *rpl;
2843 struct sk_buff *rpl_skb;
2844 struct c4iw_qp_attributes attrs;
2845 int ret;
2846 int release = 0;
2847 unsigned int tid = GET_TID(req);
2848
2849 ep = get_ep_from_tid(dev, tid);
2850 if (!ep)
2851 return 0;
2852
2853 if (is_neg_adv(req->status)) {
2854 PDBG("%s Negative advice on abort- tid %u status %d (%s)\n",
2855 __func__, ep->hwtid, req->status,
2856 neg_adv_str(req->status));
2857 ep->stats.abort_neg_adv++;
2858 mutex_lock(&dev->rdev.stats.lock);
2859 dev->rdev.stats.neg_adv++;
2860 mutex_unlock(&dev->rdev.stats.lock);
2861 goto deref_ep;
2862 }
2863 PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
2864 ep->com.state);
2865 set_bit(PEER_ABORT, &ep->com.history);
2866
2867 /*
2868 * Wake up any threads in rdma_init() or rdma_fini().
2869 * However, this is not needed if com state is just
2870 * MPA_REQ_SENT
2871 */
2872 if (ep->com.state != MPA_REQ_SENT)
2873 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2874
2875 mutex_lock(&ep->com.mutex);
2876 switch (ep->com.state) {
2877 case CONNECTING:
2878 c4iw_put_ep(&ep->parent_ep->com);
2879 break;
2880 case MPA_REQ_WAIT:
2881 (void)stop_ep_timer(ep);
2882 break;
2883 case MPA_REQ_SENT:
2884 (void)stop_ep_timer(ep);
2885 if (mpa_rev == 1 || (mpa_rev == 2 && ep->tried_with_mpa_v1))
2886 connect_reply_upcall(ep, -ECONNRESET);
2887 else {
2888 /*
2889 * we just don't send notification upwards because we
2890 * want to retry with mpa_v1 without upper layers even
2891 * knowing it.
2892 *
2893 * do some housekeeping so as to re-initiate the
2894 * connection
2895 */
2896 PDBG("%s: mpa_rev=%d. Retrying with mpav1\n", __func__,
2897 mpa_rev);
2898 ep->retry_with_mpa_v1 = 1;
2899 }
2900 break;
2901 case MPA_REP_SENT:
2902 break;
2903 case MPA_REQ_RCVD:
2904 break;
2905 case MORIBUND:
2906 case CLOSING:
2907 stop_ep_timer(ep);
2908 /*FALLTHROUGH*/
2909 case FPDU_MODE:
2910 if (ep->com.cm_id && ep->com.qp) {
2911 attrs.next_state = C4IW_QP_STATE_ERROR;
2912 ret = c4iw_modify_qp(ep->com.qp->rhp,
2913 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
2914 &attrs, 1);
2915 if (ret)
2916 printk(KERN_ERR MOD
2917 "%s - qp <- error failed!\n",
2918 __func__);
2919 }
2920 peer_abort_upcall(ep);
2921 break;
2922 case ABORTING:
2923 break;
2924 case DEAD:
2925 PDBG("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__);
2926 mutex_unlock(&ep->com.mutex);
2927 goto deref_ep;
2928 default:
2929 BUG_ON(1);
2930 break;
2931 }
2932 dst_confirm(ep->dst);
2933 if (ep->com.state != ABORTING) {
2934 __state_set(&ep->com, DEAD);
2935 /* we don't release if we want to retry with mpa_v1 */
2936 if (!ep->retry_with_mpa_v1)
2937 release = 1;
2938 }
2939 mutex_unlock(&ep->com.mutex);
2940
2941 rpl_skb = skb_dequeue(&ep->com.ep_skb_list);
2942 if (WARN_ON(!rpl_skb)) {
2943 release = 1;
2944 goto out;
2945 }
2946 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
2947 rpl = (struct cpl_abort_rpl *) skb_put(rpl_skb, sizeof(*rpl));
2948 INIT_TP_WR(rpl, ep->hwtid);
2949 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, ep->hwtid));
2950 rpl->cmd = CPL_ABORT_NO_RST;
2951 c4iw_ofld_send(&ep->com.dev->rdev, rpl_skb);
2952 out:
2953 if (release)
2954 release_ep_resources(ep);
2955 else if (ep->retry_with_mpa_v1) {
2956 if (ep->com.remote_addr.ss_family == AF_INET6) {
2957 struct sockaddr_in6 *sin6 =
2958 (struct sockaddr_in6 *)
2959 &ep->com.local_addr;
2960 cxgb4_clip_release(
2961 ep->com.dev->rdev.lldi.ports[0],
2962 (const u32 *)&sin6->sin6_addr.s6_addr,
2963 1);
2964 }
2965 remove_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep->hwtid);
2966 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
2967 dst_release(ep->dst);
2968 cxgb4_l2t_release(ep->l2t);
2969 c4iw_reconnect(ep);
2970 }
2971
2972 deref_ep:
2973 c4iw_put_ep(&ep->com);
2974 /* Dereferencing ep, referenced in peer_abort_intr() */
2975 c4iw_put_ep(&ep->com);
2976 return 0;
2977 }
2978
2979 static int close_con_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2980 {
2981 struct c4iw_ep *ep;
2982 struct c4iw_qp_attributes attrs;
2983 struct cpl_close_con_rpl *rpl = cplhdr(skb);
2984 int release = 0;
2985 unsigned int tid = GET_TID(rpl);
2986
2987 ep = get_ep_from_tid(dev, tid);
2988 if (!ep)
2989 return 0;
2990
2991 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2992 BUG_ON(!ep);
2993
2994 /* The cm_id may be null if we failed to connect */
2995 mutex_lock(&ep->com.mutex);
2996 set_bit(CLOSE_CON_RPL, &ep->com.history);
2997 switch (ep->com.state) {
2998 case CLOSING:
2999 __state_set(&ep->com, MORIBUND);
3000 break;
3001 case MORIBUND:
3002 (void)stop_ep_timer(ep);
3003 if ((ep->com.cm_id) && (ep->com.qp)) {
3004 attrs.next_state = C4IW_QP_STATE_IDLE;
3005 c4iw_modify_qp(ep->com.qp->rhp,
3006 ep->com.qp,
3007 C4IW_QP_ATTR_NEXT_STATE,
3008 &attrs, 1);
3009 }
3010 close_complete_upcall(ep, 0);
3011 __state_set(&ep->com, DEAD);
3012 release = 1;
3013 break;
3014 case ABORTING:
3015 case DEAD:
3016 break;
3017 default:
3018 BUG_ON(1);
3019 break;
3020 }
3021 mutex_unlock(&ep->com.mutex);
3022 if (release)
3023 release_ep_resources(ep);
3024 c4iw_put_ep(&ep->com);
3025 return 0;
3026 }
3027
3028 static int terminate(struct c4iw_dev *dev, struct sk_buff *skb)
3029 {
3030 struct cpl_rdma_terminate *rpl = cplhdr(skb);
3031 unsigned int tid = GET_TID(rpl);
3032 struct c4iw_ep *ep;
3033 struct c4iw_qp_attributes attrs;
3034
3035 ep = get_ep_from_tid(dev, tid);
3036 BUG_ON(!ep);
3037
3038 if (ep && ep->com.qp) {
3039 printk(KERN_WARNING MOD "TERM received tid %u qpid %u\n", tid,
3040 ep->com.qp->wq.sq.qid);
3041 attrs.next_state = C4IW_QP_STATE_TERMINATE;
3042 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
3043 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
3044 } else
3045 printk(KERN_WARNING MOD "TERM received tid %u no ep/qp\n", tid);
3046 c4iw_put_ep(&ep->com);
3047
3048 return 0;
3049 }
3050
3051 /*
3052 * Upcall from the adapter indicating data has been transmitted.
3053 * For us its just the single MPA request or reply. We can now free
3054 * the skb holding the mpa message.
3055 */
3056 static int fw4_ack(struct c4iw_dev *dev, struct sk_buff *skb)
3057 {
3058 struct c4iw_ep *ep;
3059 struct cpl_fw4_ack *hdr = cplhdr(skb);
3060 u8 credits = hdr->credits;
3061 unsigned int tid = GET_TID(hdr);
3062
3063
3064 ep = get_ep_from_tid(dev, tid);
3065 if (!ep)
3066 return 0;
3067 PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
3068 if (credits == 0) {
3069 PDBG("%s 0 credit ack ep %p tid %u state %u\n",
3070 __func__, ep, ep->hwtid, state_read(&ep->com));
3071 goto out;
3072 }
3073
3074 dst_confirm(ep->dst);
3075 if (ep->mpa_skb) {
3076 PDBG("%s last streaming msg ack ep %p tid %u state %u "
3077 "initiator %u freeing skb\n", __func__, ep, ep->hwtid,
3078 state_read(&ep->com), ep->mpa_attr.initiator ? 1 : 0);
3079 mutex_lock(&ep->com.mutex);
3080 kfree_skb(ep->mpa_skb);
3081 ep->mpa_skb = NULL;
3082 if (test_bit(STOP_MPA_TIMER, &ep->com.flags))
3083 stop_ep_timer(ep);
3084 mutex_unlock(&ep->com.mutex);
3085 }
3086 out:
3087 c4iw_put_ep(&ep->com);
3088 return 0;
3089 }
3090
3091 int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3092 {
3093 int abort;
3094 struct c4iw_ep *ep = to_ep(cm_id);
3095
3096 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
3097
3098 mutex_lock(&ep->com.mutex);
3099 if (ep->com.state != MPA_REQ_RCVD) {
3100 mutex_unlock(&ep->com.mutex);
3101 c4iw_put_ep(&ep->com);
3102 return -ECONNRESET;
3103 }
3104 set_bit(ULP_REJECT, &ep->com.history);
3105 if (mpa_rev == 0)
3106 abort = 1;
3107 else
3108 abort = send_mpa_reject(ep, pdata, pdata_len);
3109 mutex_unlock(&ep->com.mutex);
3110
3111 stop_ep_timer(ep);
3112 c4iw_ep_disconnect(ep, abort != 0, GFP_KERNEL);
3113 c4iw_put_ep(&ep->com);
3114 return 0;
3115 }
3116
3117 int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3118 {
3119 int err;
3120 struct c4iw_qp_attributes attrs;
3121 enum c4iw_qp_attr_mask mask;
3122 struct c4iw_ep *ep = to_ep(cm_id);
3123 struct c4iw_dev *h = to_c4iw_dev(cm_id->device);
3124 struct c4iw_qp *qp = get_qhp(h, conn_param->qpn);
3125 int abort = 0;
3126
3127 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
3128
3129 mutex_lock(&ep->com.mutex);
3130 if (ep->com.state != MPA_REQ_RCVD) {
3131 err = -ECONNRESET;
3132 goto err_out;
3133 }
3134
3135 BUG_ON(!qp);
3136
3137 set_bit(ULP_ACCEPT, &ep->com.history);
3138 if ((conn_param->ord > cur_max_read_depth(ep->com.dev)) ||
3139 (conn_param->ird > cur_max_read_depth(ep->com.dev))) {
3140 err = -EINVAL;
3141 goto err_abort;
3142 }
3143
3144 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
3145 if (conn_param->ord > ep->ird) {
3146 if (RELAXED_IRD_NEGOTIATION) {
3147 conn_param->ord = ep->ird;
3148 } else {
3149 ep->ird = conn_param->ird;
3150 ep->ord = conn_param->ord;
3151 send_mpa_reject(ep, conn_param->private_data,
3152 conn_param->private_data_len);
3153 err = -ENOMEM;
3154 goto err_abort;
3155 }
3156 }
3157 if (conn_param->ird < ep->ord) {
3158 if (RELAXED_IRD_NEGOTIATION &&
3159 ep->ord <= h->rdev.lldi.max_ordird_qp) {
3160 conn_param->ird = ep->ord;
3161 } else {
3162 err = -ENOMEM;
3163 goto err_abort;
3164 }
3165 }
3166 }
3167 ep->ird = conn_param->ird;
3168 ep->ord = conn_param->ord;
3169
3170 if (ep->mpa_attr.version == 1) {
3171 if (peer2peer && ep->ird == 0)
3172 ep->ird = 1;
3173 } else {
3174 if (peer2peer &&
3175 (ep->mpa_attr.p2p_type != FW_RI_INIT_P2PTYPE_DISABLED) &&
3176 (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ) && ep->ird == 0)
3177 ep->ird = 1;
3178 }
3179
3180 PDBG("%s %d ird %d ord %d\n", __func__, __LINE__, ep->ird, ep->ord);
3181
3182 ep->com.cm_id = cm_id;
3183 ref_cm_id(&ep->com);
3184 ep->com.qp = qp;
3185 ref_qp(ep);
3186
3187 /* bind QP to EP and move to RTS */
3188 attrs.mpa_attr = ep->mpa_attr;
3189 attrs.max_ird = ep->ird;
3190 attrs.max_ord = ep->ord;
3191 attrs.llp_stream_handle = ep;
3192 attrs.next_state = C4IW_QP_STATE_RTS;
3193
3194 /* bind QP and TID with INIT_WR */
3195 mask = C4IW_QP_ATTR_NEXT_STATE |
3196 C4IW_QP_ATTR_LLP_STREAM_HANDLE |
3197 C4IW_QP_ATTR_MPA_ATTR |
3198 C4IW_QP_ATTR_MAX_IRD |
3199 C4IW_QP_ATTR_MAX_ORD;
3200
3201 err = c4iw_modify_qp(ep->com.qp->rhp,
3202 ep->com.qp, mask, &attrs, 1);
3203 if (err)
3204 goto err_deref_cm_id;
3205
3206 set_bit(STOP_MPA_TIMER, &ep->com.flags);
3207 err = send_mpa_reply(ep, conn_param->private_data,
3208 conn_param->private_data_len);
3209 if (err)
3210 goto err_deref_cm_id;
3211
3212 __state_set(&ep->com, FPDU_MODE);
3213 established_upcall(ep);
3214 mutex_unlock(&ep->com.mutex);
3215 c4iw_put_ep(&ep->com);
3216 return 0;
3217 err_deref_cm_id:
3218 deref_cm_id(&ep->com);
3219 err_abort:
3220 abort = 1;
3221 err_out:
3222 mutex_unlock(&ep->com.mutex);
3223 if (abort)
3224 c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
3225 c4iw_put_ep(&ep->com);
3226 return err;
3227 }
3228
3229 static int pick_local_ipaddrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
3230 {
3231 struct in_device *ind;
3232 int found = 0;
3233 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3234 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
3235
3236 ind = in_dev_get(dev->rdev.lldi.ports[0]);
3237 if (!ind)
3238 return -EADDRNOTAVAIL;
3239 for_primary_ifa(ind) {
3240 laddr->sin_addr.s_addr = ifa->ifa_address;
3241 raddr->sin_addr.s_addr = ifa->ifa_address;
3242 found = 1;
3243 break;
3244 }
3245 endfor_ifa(ind);
3246 in_dev_put(ind);
3247 return found ? 0 : -EADDRNOTAVAIL;
3248 }
3249
3250 static int get_lladdr(struct net_device *dev, struct in6_addr *addr,
3251 unsigned char banned_flags)
3252 {
3253 struct inet6_dev *idev;
3254 int err = -EADDRNOTAVAIL;
3255
3256 rcu_read_lock();
3257 idev = __in6_dev_get(dev);
3258 if (idev != NULL) {
3259 struct inet6_ifaddr *ifp;
3260
3261 read_lock_bh(&idev->lock);
3262 list_for_each_entry(ifp, &idev->addr_list, if_list) {
3263 if (ifp->scope == IFA_LINK &&
3264 !(ifp->flags & banned_flags)) {
3265 memcpy(addr, &ifp->addr, 16);
3266 err = 0;
3267 break;
3268 }
3269 }
3270 read_unlock_bh(&idev->lock);
3271 }
3272 rcu_read_unlock();
3273 return err;
3274 }
3275
3276 static int pick_local_ip6addrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
3277 {
3278 struct in6_addr uninitialized_var(addr);
3279 struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3280 struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr;
3281
3282 if (!get_lladdr(dev->rdev.lldi.ports[0], &addr, IFA_F_TENTATIVE)) {
3283 memcpy(la6->sin6_addr.s6_addr, &addr, 16);
3284 memcpy(ra6->sin6_addr.s6_addr, &addr, 16);
3285 return 0;
3286 }
3287 return -EADDRNOTAVAIL;
3288 }
3289
3290 int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3291 {
3292 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
3293 struct c4iw_ep *ep;
3294 int err = 0;
3295 struct sockaddr_in *laddr;
3296 struct sockaddr_in *raddr;
3297 struct sockaddr_in6 *laddr6;
3298 struct sockaddr_in6 *raddr6;
3299 __u8 *ra;
3300 int iptype;
3301
3302 if ((conn_param->ord > cur_max_read_depth(dev)) ||
3303 (conn_param->ird > cur_max_read_depth(dev))) {
3304 err = -EINVAL;
3305 goto out;
3306 }
3307 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
3308 if (!ep) {
3309 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
3310 err = -ENOMEM;
3311 goto out;
3312 }
3313
3314 skb_queue_head_init(&ep->com.ep_skb_list);
3315 if (alloc_ep_skb_list(&ep->com.ep_skb_list, CN_MAX_CON_BUF)) {
3316 err = -ENOMEM;
3317 goto fail1;
3318 }
3319
3320 init_timer(&ep->timer);
3321 ep->plen = conn_param->private_data_len;
3322 if (ep->plen)
3323 memcpy(ep->mpa_pkt + sizeof(struct mpa_message),
3324 conn_param->private_data, ep->plen);
3325 ep->ird = conn_param->ird;
3326 ep->ord = conn_param->ord;
3327
3328 if (peer2peer && ep->ord == 0)
3329 ep->ord = 1;
3330
3331 ep->com.cm_id = cm_id;
3332 ref_cm_id(&ep->com);
3333 ep->com.dev = dev;
3334 ep->com.qp = get_qhp(dev, conn_param->qpn);
3335 if (!ep->com.qp) {
3336 PDBG("%s qpn 0x%x not found!\n", __func__, conn_param->qpn);
3337 err = -EINVAL;
3338 goto fail2;
3339 }
3340 ref_qp(ep);
3341 PDBG("%s qpn 0x%x qp %p cm_id %p\n", __func__, conn_param->qpn,
3342 ep->com.qp, cm_id);
3343
3344 /*
3345 * Allocate an active TID to initiate a TCP connection.
3346 */
3347 ep->atid = cxgb4_alloc_atid(dev->rdev.lldi.tids, ep);
3348 if (ep->atid == -1) {
3349 printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__);
3350 err = -ENOMEM;
3351 goto fail2;
3352 }
3353 insert_handle(dev, &dev->atid_idr, ep, ep->atid);
3354
3355 memcpy(&ep->com.local_addr, &cm_id->m_local_addr,
3356 sizeof(ep->com.local_addr));
3357 memcpy(&ep->com.remote_addr, &cm_id->m_remote_addr,
3358 sizeof(ep->com.remote_addr));
3359
3360 laddr = (struct sockaddr_in *)&ep->com.local_addr;
3361 raddr = (struct sockaddr_in *)&ep->com.remote_addr;
3362 laddr6 = (struct sockaddr_in6 *)&ep->com.local_addr;
3363 raddr6 = (struct sockaddr_in6 *) &ep->com.remote_addr;
3364
3365 if (cm_id->m_remote_addr.ss_family == AF_INET) {
3366 iptype = 4;
3367 ra = (__u8 *)&raddr->sin_addr;
3368
3369 /*
3370 * Handle loopback requests to INADDR_ANY.
3371 */
3372 if (raddr->sin_addr.s_addr == htonl(INADDR_ANY)) {
3373 err = pick_local_ipaddrs(dev, cm_id);
3374 if (err)
3375 goto fail2;
3376 }
3377
3378 /* find a route */
3379 PDBG("%s saddr %pI4 sport 0x%x raddr %pI4 rport 0x%x\n",
3380 __func__, &laddr->sin_addr, ntohs(laddr->sin_port),
3381 ra, ntohs(raddr->sin_port));
3382 ep->dst = find_route(dev, laddr->sin_addr.s_addr,
3383 raddr->sin_addr.s_addr, laddr->sin_port,
3384 raddr->sin_port, cm_id->tos);
3385 } else {
3386 iptype = 6;
3387 ra = (__u8 *)&raddr6->sin6_addr;
3388
3389 /*
3390 * Handle loopback requests to INADDR_ANY.
3391 */
3392 if (ipv6_addr_type(&raddr6->sin6_addr) == IPV6_ADDR_ANY) {
3393 err = pick_local_ip6addrs(dev, cm_id);
3394 if (err)
3395 goto fail2;
3396 }
3397
3398 /* find a route */
3399 PDBG("%s saddr %pI6 sport 0x%x raddr %pI6 rport 0x%x\n",
3400 __func__, laddr6->sin6_addr.s6_addr,
3401 ntohs(laddr6->sin6_port),
3402 raddr6->sin6_addr.s6_addr, ntohs(raddr6->sin6_port));
3403 ep->dst = find_route6(dev, laddr6->sin6_addr.s6_addr,
3404 raddr6->sin6_addr.s6_addr,
3405 laddr6->sin6_port, raddr6->sin6_port, 0,
3406 raddr6->sin6_scope_id);
3407 }
3408 if (!ep->dst) {
3409 printk(KERN_ERR MOD "%s - cannot find route.\n", __func__);
3410 err = -EHOSTUNREACH;
3411 goto fail3;
3412 }
3413
3414 err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, true,
3415 ep->com.dev->rdev.lldi.adapter_type, cm_id->tos);
3416 if (err) {
3417 printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__);
3418 goto fail4;
3419 }
3420
3421 PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
3422 __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
3423 ep->l2t->idx);
3424
3425 state_set(&ep->com, CONNECTING);
3426 ep->tos = cm_id->tos;
3427
3428 /* send connect request to rnic */
3429 err = send_connect(ep);
3430 if (!err)
3431 goto out;
3432
3433 cxgb4_l2t_release(ep->l2t);
3434 fail4:
3435 dst_release(ep->dst);
3436 fail3:
3437 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
3438 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
3439 fail2:
3440 skb_queue_purge(&ep->com.ep_skb_list);
3441 deref_cm_id(&ep->com);
3442 fail1:
3443 c4iw_put_ep(&ep->com);
3444 out:
3445 return err;
3446 }
3447
3448 static int create_server6(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
3449 {
3450 int err;
3451 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)
3452 &ep->com.local_addr;
3453
3454 if (ipv6_addr_type(&sin6->sin6_addr) != IPV6_ADDR_ANY) {
3455 err = cxgb4_clip_get(ep->com.dev->rdev.lldi.ports[0],
3456 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
3457 if (err)
3458 return err;
3459 }
3460 c4iw_init_wr_wait(&ep->com.wr_wait);
3461 err = cxgb4_create_server6(ep->com.dev->rdev.lldi.ports[0],
3462 ep->stid, &sin6->sin6_addr,
3463 sin6->sin6_port,
3464 ep->com.dev->rdev.lldi.rxq_ids[0]);
3465 if (!err)
3466 err = c4iw_wait_for_reply(&ep->com.dev->rdev,
3467 &ep->com.wr_wait,
3468 0, 0, __func__);
3469 else if (err > 0)
3470 err = net_xmit_errno(err);
3471 if (err) {
3472 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
3473 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
3474 pr_err("cxgb4_create_server6/filter failed err %d stid %d laddr %pI6 lport %d\n",
3475 err, ep->stid,
3476 sin6->sin6_addr.s6_addr, ntohs(sin6->sin6_port));
3477 }
3478 return err;
3479 }
3480
3481 static int create_server4(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
3482 {
3483 int err;
3484 struct sockaddr_in *sin = (struct sockaddr_in *)
3485 &ep->com.local_addr;
3486
3487 if (dev->rdev.lldi.enable_fw_ofld_conn) {
3488 do {
3489 err = cxgb4_create_server_filter(
3490 ep->com.dev->rdev.lldi.ports[0], ep->stid,
3491 sin->sin_addr.s_addr, sin->sin_port, 0,
3492 ep->com.dev->rdev.lldi.rxq_ids[0], 0, 0);
3493 if (err == -EBUSY) {
3494 if (c4iw_fatal_error(&ep->com.dev->rdev)) {
3495 err = -EIO;
3496 break;
3497 }
3498 set_current_state(TASK_UNINTERRUPTIBLE);
3499 schedule_timeout(usecs_to_jiffies(100));
3500 }
3501 } while (err == -EBUSY);
3502 } else {
3503 c4iw_init_wr_wait(&ep->com.wr_wait);
3504 err = cxgb4_create_server(ep->com.dev->rdev.lldi.ports[0],
3505 ep->stid, sin->sin_addr.s_addr, sin->sin_port,
3506 0, ep->com.dev->rdev.lldi.rxq_ids[0]);
3507 if (!err)
3508 err = c4iw_wait_for_reply(&ep->com.dev->rdev,
3509 &ep->com.wr_wait,
3510 0, 0, __func__);
3511 else if (err > 0)
3512 err = net_xmit_errno(err);
3513 }
3514 if (err)
3515 pr_err("cxgb4_create_server/filter failed err %d stid %d laddr %pI4 lport %d\n"
3516 , err, ep->stid,
3517 &sin->sin_addr, ntohs(sin->sin_port));
3518 return err;
3519 }
3520
3521 int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog)
3522 {
3523 int err = 0;
3524 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
3525 struct c4iw_listen_ep *ep;
3526
3527 might_sleep();
3528
3529 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
3530 if (!ep) {
3531 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
3532 err = -ENOMEM;
3533 goto fail1;
3534 }
3535 skb_queue_head_init(&ep->com.ep_skb_list);
3536 PDBG("%s ep %p\n", __func__, ep);
3537 ep->com.cm_id = cm_id;
3538 ref_cm_id(&ep->com);
3539 ep->com.dev = dev;
3540 ep->backlog = backlog;
3541 memcpy(&ep->com.local_addr, &cm_id->m_local_addr,
3542 sizeof(ep->com.local_addr));
3543
3544 /*
3545 * Allocate a server TID.
3546 */
3547 if (dev->rdev.lldi.enable_fw_ofld_conn &&
3548 ep->com.local_addr.ss_family == AF_INET)
3549 ep->stid = cxgb4_alloc_sftid(dev->rdev.lldi.tids,
3550 cm_id->m_local_addr.ss_family, ep);
3551 else
3552 ep->stid = cxgb4_alloc_stid(dev->rdev.lldi.tids,
3553 cm_id->m_local_addr.ss_family, ep);
3554
3555 if (ep->stid == -1) {
3556 printk(KERN_ERR MOD "%s - cannot alloc stid.\n", __func__);
3557 err = -ENOMEM;
3558 goto fail2;
3559 }
3560 insert_handle(dev, &dev->stid_idr, ep, ep->stid);
3561
3562 memcpy(&ep->com.local_addr, &cm_id->m_local_addr,
3563 sizeof(ep->com.local_addr));
3564
3565 state_set(&ep->com, LISTEN);
3566 if (ep->com.local_addr.ss_family == AF_INET)
3567 err = create_server4(dev, ep);
3568 else
3569 err = create_server6(dev, ep);
3570 if (!err) {
3571 cm_id->provider_data = ep;
3572 goto out;
3573 }
3574
3575 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
3576 ep->com.local_addr.ss_family);
3577 fail2:
3578 deref_cm_id(&ep->com);
3579 c4iw_put_ep(&ep->com);
3580 fail1:
3581 out:
3582 return err;
3583 }
3584
3585 int c4iw_destroy_listen(struct iw_cm_id *cm_id)
3586 {
3587 int err;
3588 struct c4iw_listen_ep *ep = to_listen_ep(cm_id);
3589
3590 PDBG("%s ep %p\n", __func__, ep);
3591
3592 might_sleep();
3593 state_set(&ep->com, DEAD);
3594 if (ep->com.dev->rdev.lldi.enable_fw_ofld_conn &&
3595 ep->com.local_addr.ss_family == AF_INET) {
3596 err = cxgb4_remove_server_filter(
3597 ep->com.dev->rdev.lldi.ports[0], ep->stid,
3598 ep->com.dev->rdev.lldi.rxq_ids[0], 0);
3599 } else {
3600 struct sockaddr_in6 *sin6;
3601 c4iw_init_wr_wait(&ep->com.wr_wait);
3602 err = cxgb4_remove_server(
3603 ep->com.dev->rdev.lldi.ports[0], ep->stid,
3604 ep->com.dev->rdev.lldi.rxq_ids[0], 0);
3605 if (err)
3606 goto done;
3607 err = c4iw_wait_for_reply(&ep->com.dev->rdev, &ep->com.wr_wait,
3608 0, 0, __func__);
3609 sin6 = (struct sockaddr_in6 *)&ep->com.local_addr;
3610 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
3611 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
3612 }
3613 remove_handle(ep->com.dev, &ep->com.dev->stid_idr, ep->stid);
3614 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
3615 ep->com.local_addr.ss_family);
3616 done:
3617 deref_cm_id(&ep->com);
3618 c4iw_put_ep(&ep->com);
3619 return err;
3620 }
3621
3622 int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp)
3623 {
3624 int ret = 0;
3625 int close = 0;
3626 int fatal = 0;
3627 struct c4iw_rdev *rdev;
3628
3629 mutex_lock(&ep->com.mutex);
3630
3631 PDBG("%s ep %p state %s, abrupt %d\n", __func__, ep,
3632 states[ep->com.state], abrupt);
3633
3634 /*
3635 * Ref the ep here in case we have fatal errors causing the
3636 * ep to be released and freed.
3637 */
3638 c4iw_get_ep(&ep->com);
3639
3640 rdev = &ep->com.dev->rdev;
3641 if (c4iw_fatal_error(rdev)) {
3642 fatal = 1;
3643 close_complete_upcall(ep, -EIO);
3644 ep->com.state = DEAD;
3645 }
3646 switch (ep->com.state) {
3647 case MPA_REQ_WAIT:
3648 case MPA_REQ_SENT:
3649 case MPA_REQ_RCVD:
3650 case MPA_REP_SENT:
3651 case FPDU_MODE:
3652 case CONNECTING:
3653 close = 1;
3654 if (abrupt)
3655 ep->com.state = ABORTING;
3656 else {
3657 ep->com.state = CLOSING;
3658
3659 /*
3660 * if we close before we see the fw4_ack() then we fix
3661 * up the timer state since we're reusing it.
3662 */
3663 if (ep->mpa_skb &&
3664 test_bit(STOP_MPA_TIMER, &ep->com.flags)) {
3665 clear_bit(STOP_MPA_TIMER, &ep->com.flags);
3666 stop_ep_timer(ep);
3667 }
3668 start_ep_timer(ep);
3669 }
3670 set_bit(CLOSE_SENT, &ep->com.flags);
3671 break;
3672 case CLOSING:
3673 if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
3674 close = 1;
3675 if (abrupt) {
3676 (void)stop_ep_timer(ep);
3677 ep->com.state = ABORTING;
3678 } else
3679 ep->com.state = MORIBUND;
3680 }
3681 break;
3682 case MORIBUND:
3683 case ABORTING:
3684 case DEAD:
3685 PDBG("%s ignoring disconnect ep %p state %u\n",
3686 __func__, ep, ep->com.state);
3687 break;
3688 default:
3689 BUG();
3690 break;
3691 }
3692
3693 if (close) {
3694 if (abrupt) {
3695 set_bit(EP_DISC_ABORT, &ep->com.history);
3696 close_complete_upcall(ep, -ECONNRESET);
3697 ret = send_abort(ep);
3698 } else {
3699 set_bit(EP_DISC_CLOSE, &ep->com.history);
3700 ret = send_halfclose(ep);
3701 }
3702 if (ret) {
3703 set_bit(EP_DISC_FAIL, &ep->com.history);
3704 if (!abrupt) {
3705 stop_ep_timer(ep);
3706 close_complete_upcall(ep, -EIO);
3707 }
3708 if (ep->com.qp) {
3709 struct c4iw_qp_attributes attrs;
3710
3711 attrs.next_state = C4IW_QP_STATE_ERROR;
3712 ret = c4iw_modify_qp(ep->com.qp->rhp,
3713 ep->com.qp,
3714 C4IW_QP_ATTR_NEXT_STATE,
3715 &attrs, 1);
3716 if (ret)
3717 pr_err(MOD
3718 "%s - qp <- error failed!\n",
3719 __func__);
3720 }
3721 fatal = 1;
3722 }
3723 }
3724 mutex_unlock(&ep->com.mutex);
3725 c4iw_put_ep(&ep->com);
3726 if (fatal)
3727 release_ep_resources(ep);
3728 return ret;
3729 }
3730
3731 static void active_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
3732 struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
3733 {
3734 struct c4iw_ep *ep;
3735 int atid = be32_to_cpu(req->tid);
3736
3737 ep = (struct c4iw_ep *)lookup_atid(dev->rdev.lldi.tids,
3738 (__force u32) req->tid);
3739 if (!ep)
3740 return;
3741
3742 switch (req->retval) {
3743 case FW_ENOMEM:
3744 set_bit(ACT_RETRY_NOMEM, &ep->com.history);
3745 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
3746 send_fw_act_open_req(ep, atid);
3747 return;
3748 }
3749 case FW_EADDRINUSE:
3750 set_bit(ACT_RETRY_INUSE, &ep->com.history);
3751 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
3752 send_fw_act_open_req(ep, atid);
3753 return;
3754 }
3755 break;
3756 default:
3757 pr_info("%s unexpected ofld conn wr retval %d\n",
3758 __func__, req->retval);
3759 break;
3760 }
3761 pr_err("active ofld_connect_wr failure %d atid %d\n",
3762 req->retval, atid);
3763 mutex_lock(&dev->rdev.stats.lock);
3764 dev->rdev.stats.act_ofld_conn_fails++;
3765 mutex_unlock(&dev->rdev.stats.lock);
3766 connect_reply_upcall(ep, status2errno(req->retval));
3767 state_set(&ep->com, DEAD);
3768 if (ep->com.remote_addr.ss_family == AF_INET6) {
3769 struct sockaddr_in6 *sin6 =
3770 (struct sockaddr_in6 *)&ep->com.local_addr;
3771 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
3772 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
3773 }
3774 remove_handle(dev, &dev->atid_idr, atid);
3775 cxgb4_free_atid(dev->rdev.lldi.tids, atid);
3776 dst_release(ep->dst);
3777 cxgb4_l2t_release(ep->l2t);
3778 c4iw_put_ep(&ep->com);
3779 }
3780
3781 static void passive_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
3782 struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
3783 {
3784 struct sk_buff *rpl_skb;
3785 struct cpl_pass_accept_req *cpl;
3786 int ret;
3787
3788 rpl_skb = (struct sk_buff *)(unsigned long)req->cookie;
3789 BUG_ON(!rpl_skb);
3790 if (req->retval) {
3791 PDBG("%s passive open failure %d\n", __func__, req->retval);
3792 mutex_lock(&dev->rdev.stats.lock);
3793 dev->rdev.stats.pas_ofld_conn_fails++;
3794 mutex_unlock(&dev->rdev.stats.lock);
3795 kfree_skb(rpl_skb);
3796 } else {
3797 cpl = (struct cpl_pass_accept_req *)cplhdr(rpl_skb);
3798 OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ,
3799 (__force u32) htonl(
3800 (__force u32) req->tid)));
3801 ret = pass_accept_req(dev, rpl_skb);
3802 if (!ret)
3803 kfree_skb(rpl_skb);
3804 }
3805 return;
3806 }
3807
3808 static int deferred_fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
3809 {
3810 struct cpl_fw6_msg *rpl = cplhdr(skb);
3811 struct cpl_fw6_msg_ofld_connection_wr_rpl *req;
3812
3813 switch (rpl->type) {
3814 case FW6_TYPE_CQE:
3815 c4iw_ev_dispatch(dev, (struct t4_cqe *)&rpl->data[0]);
3816 break;
3817 case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
3818 req = (struct cpl_fw6_msg_ofld_connection_wr_rpl *)rpl->data;
3819 switch (req->t_state) {
3820 case TCP_SYN_SENT:
3821 active_ofld_conn_reply(dev, skb, req);
3822 break;
3823 case TCP_SYN_RECV:
3824 passive_ofld_conn_reply(dev, skb, req);
3825 break;
3826 default:
3827 pr_err("%s unexpected ofld conn wr state %d\n",
3828 __func__, req->t_state);
3829 break;
3830 }
3831 break;
3832 }
3833 return 0;
3834 }
3835
3836 static void build_cpl_pass_accept_req(struct sk_buff *skb, int stid , u8 tos)
3837 {
3838 __be32 l2info;
3839 __be16 hdr_len, vlantag, len;
3840 u16 eth_hdr_len;
3841 int tcp_hdr_len, ip_hdr_len;
3842 u8 intf;
3843 struct cpl_rx_pkt *cpl = cplhdr(skb);
3844 struct cpl_pass_accept_req *req;
3845 struct tcp_options_received tmp_opt;
3846 struct c4iw_dev *dev;
3847 enum chip_type type;
3848
3849 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
3850 /* Store values from cpl_rx_pkt in temporary location. */
3851 vlantag = cpl->vlan;
3852 len = cpl->len;
3853 l2info = cpl->l2info;
3854 hdr_len = cpl->hdr_len;
3855 intf = cpl->iff;
3856
3857 __skb_pull(skb, sizeof(*req) + sizeof(struct rss_header));
3858
3859 /*
3860 * We need to parse the TCP options from SYN packet.
3861 * to generate cpl_pass_accept_req.
3862 */
3863 memset(&tmp_opt, 0, sizeof(tmp_opt));
3864 tcp_clear_options(&tmp_opt);
3865 tcp_parse_options(skb, &tmp_opt, 0, NULL);
3866
3867 req = (struct cpl_pass_accept_req *)__skb_push(skb, sizeof(*req));
3868 memset(req, 0, sizeof(*req));
3869 req->l2info = cpu_to_be16(SYN_INTF_V(intf) |
3870 SYN_MAC_IDX_V(RX_MACIDX_G(
3871 be32_to_cpu(l2info))) |
3872 SYN_XACT_MATCH_F);
3873 type = dev->rdev.lldi.adapter_type;
3874 tcp_hdr_len = RX_TCPHDR_LEN_G(be16_to_cpu(hdr_len));
3875 ip_hdr_len = RX_IPHDR_LEN_G(be16_to_cpu(hdr_len));
3876 req->hdr_len =
3877 cpu_to_be32(SYN_RX_CHAN_V(RX_CHAN_G(be32_to_cpu(l2info))));
3878 if (CHELSIO_CHIP_VERSION(type) <= CHELSIO_T5) {
3879 eth_hdr_len = is_t4(type) ?
3880 RX_ETHHDR_LEN_G(be32_to_cpu(l2info)) :
3881 RX_T5_ETHHDR_LEN_G(be32_to_cpu(l2info));
3882 req->hdr_len |= cpu_to_be32(TCP_HDR_LEN_V(tcp_hdr_len) |
3883 IP_HDR_LEN_V(ip_hdr_len) |
3884 ETH_HDR_LEN_V(eth_hdr_len));
3885 } else { /* T6 and later */
3886 eth_hdr_len = RX_T6_ETHHDR_LEN_G(be32_to_cpu(l2info));
3887 req->hdr_len |= cpu_to_be32(T6_TCP_HDR_LEN_V(tcp_hdr_len) |
3888 T6_IP_HDR_LEN_V(ip_hdr_len) |
3889 T6_ETH_HDR_LEN_V(eth_hdr_len));
3890 }
3891 req->vlan = vlantag;
3892 req->len = len;
3893 req->tos_stid = cpu_to_be32(PASS_OPEN_TID_V(stid) |
3894 PASS_OPEN_TOS_V(tos));
3895 req->tcpopt.mss = htons(tmp_opt.mss_clamp);
3896 if (tmp_opt.wscale_ok)
3897 req->tcpopt.wsf = tmp_opt.snd_wscale;
3898 req->tcpopt.tstamp = tmp_opt.saw_tstamp;
3899 if (tmp_opt.sack_ok)
3900 req->tcpopt.sack = 1;
3901 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ, 0));
3902 return;
3903 }
3904
3905 static void send_fw_pass_open_req(struct c4iw_dev *dev, struct sk_buff *skb,
3906 __be32 laddr, __be16 lport,
3907 __be32 raddr, __be16 rport,
3908 u32 rcv_isn, u32 filter, u16 window,
3909 u32 rss_qid, u8 port_id)
3910 {
3911 struct sk_buff *req_skb;
3912 struct fw_ofld_connection_wr *req;
3913 struct cpl_pass_accept_req *cpl = cplhdr(skb);
3914 int ret;
3915
3916 req_skb = alloc_skb(sizeof(struct fw_ofld_connection_wr), GFP_KERNEL);
3917 req = (struct fw_ofld_connection_wr *)__skb_put(req_skb, sizeof(*req));
3918 memset(req, 0, sizeof(*req));
3919 req->op_compl = htonl(WR_OP_V(FW_OFLD_CONNECTION_WR) | FW_WR_COMPL_F);
3920 req->len16_pkd = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*req), 16)));
3921 req->le.version_cpl = htonl(FW_OFLD_CONNECTION_WR_CPL_F);
3922 req->le.filter = (__force __be32) filter;
3923 req->le.lport = lport;
3924 req->le.pport = rport;
3925 req->le.u.ipv4.lip = laddr;
3926 req->le.u.ipv4.pip = raddr;
3927 req->tcb.rcv_nxt = htonl(rcv_isn + 1);
3928 req->tcb.rcv_adv = htons(window);
3929 req->tcb.t_state_to_astid =
3930 htonl(FW_OFLD_CONNECTION_WR_T_STATE_V(TCP_SYN_RECV) |
3931 FW_OFLD_CONNECTION_WR_RCV_SCALE_V(cpl->tcpopt.wsf) |
3932 FW_OFLD_CONNECTION_WR_ASTID_V(
3933 PASS_OPEN_TID_G(ntohl(cpl->tos_stid))));
3934
3935 /*
3936 * We store the qid in opt2 which will be used by the firmware
3937 * to send us the wr response.
3938 */
3939 req->tcb.opt2 = htonl(RSS_QUEUE_V(rss_qid));
3940
3941 /*
3942 * We initialize the MSS index in TCB to 0xF.
3943 * So that when driver sends cpl_pass_accept_rpl
3944 * TCB picks up the correct value. If this was 0
3945 * TP will ignore any value > 0 for MSS index.
3946 */
3947 req->tcb.opt0 = cpu_to_be64(MSS_IDX_V(0xF));
3948 req->cookie = (uintptr_t)skb;
3949
3950 set_wr_txq(req_skb, CPL_PRIORITY_CONTROL, port_id);
3951 ret = cxgb4_ofld_send(dev->rdev.lldi.ports[0], req_skb);
3952 if (ret < 0) {
3953 pr_err("%s - cxgb4_ofld_send error %d - dropping\n", __func__,
3954 ret);
3955 kfree_skb(skb);
3956 kfree_skb(req_skb);
3957 }
3958 }
3959
3960 /*
3961 * Handler for CPL_RX_PKT message. Need to handle cpl_rx_pkt
3962 * messages when a filter is being used instead of server to
3963 * redirect a syn packet. When packets hit filter they are redirected
3964 * to the offload queue and driver tries to establish the connection
3965 * using firmware work request.
3966 */
3967 static int rx_pkt(struct c4iw_dev *dev, struct sk_buff *skb)
3968 {
3969 int stid;
3970 unsigned int filter;
3971 struct ethhdr *eh = NULL;
3972 struct vlan_ethhdr *vlan_eh = NULL;
3973 struct iphdr *iph;
3974 struct tcphdr *tcph;
3975 struct rss_header *rss = (void *)skb->data;
3976 struct cpl_rx_pkt *cpl = (void *)skb->data;
3977 struct cpl_pass_accept_req *req = (void *)(rss + 1);
3978 struct l2t_entry *e;
3979 struct dst_entry *dst;
3980 struct c4iw_ep *lep = NULL;
3981 u16 window;
3982 struct port_info *pi;
3983 struct net_device *pdev;
3984 u16 rss_qid, eth_hdr_len;
3985 int step;
3986 u32 tx_chan;
3987 struct neighbour *neigh;
3988
3989 /* Drop all non-SYN packets */
3990 if (!(cpl->l2info & cpu_to_be32(RXF_SYN_F)))
3991 goto reject;
3992
3993 /*
3994 * Drop all packets which did not hit the filter.
3995 * Unlikely to happen.
3996 */
3997 if (!(rss->filter_hit && rss->filter_tid))
3998 goto reject;
3999
4000 /*
4001 * Calculate the server tid from filter hit index from cpl_rx_pkt.
4002 */
4003 stid = (__force int) cpu_to_be32((__force u32) rss->hash_val);
4004
4005 lep = (struct c4iw_ep *)get_ep_from_stid(dev, stid);
4006 if (!lep) {
4007 PDBG("%s connect request on invalid stid %d\n", __func__, stid);
4008 goto reject;
4009 }
4010
4011 switch (CHELSIO_CHIP_VERSION(dev->rdev.lldi.adapter_type)) {
4012 case CHELSIO_T4:
4013 eth_hdr_len = RX_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info));
4014 break;
4015 case CHELSIO_T5:
4016 eth_hdr_len = RX_T5_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info));
4017 break;
4018 case CHELSIO_T6:
4019 eth_hdr_len = RX_T6_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info));
4020 break;
4021 default:
4022 pr_err("T%d Chip is not supported\n",
4023 CHELSIO_CHIP_VERSION(dev->rdev.lldi.adapter_type));
4024 goto reject;
4025 }
4026
4027 if (eth_hdr_len == ETH_HLEN) {
4028 eh = (struct ethhdr *)(req + 1);
4029 iph = (struct iphdr *)(eh + 1);
4030 } else {
4031 vlan_eh = (struct vlan_ethhdr *)(req + 1);
4032 iph = (struct iphdr *)(vlan_eh + 1);
4033 skb->vlan_tci = ntohs(cpl->vlan);
4034 }
4035
4036 if (iph->version != 0x4)
4037 goto reject;
4038
4039 tcph = (struct tcphdr *)(iph + 1);
4040 skb_set_network_header(skb, (void *)iph - (void *)rss);
4041 skb_set_transport_header(skb, (void *)tcph - (void *)rss);
4042 skb_get(skb);
4043
4044 PDBG("%s lip 0x%x lport %u pip 0x%x pport %u tos %d\n", __func__,
4045 ntohl(iph->daddr), ntohs(tcph->dest), ntohl(iph->saddr),
4046 ntohs(tcph->source), iph->tos);
4047
4048 dst = find_route(dev, iph->daddr, iph->saddr, tcph->dest, tcph->source,
4049 iph->tos);
4050 if (!dst) {
4051 pr_err("%s - failed to find dst entry!\n",
4052 __func__);
4053 goto reject;
4054 }
4055 neigh = dst_neigh_lookup_skb(dst, skb);
4056
4057 if (!neigh) {
4058 pr_err("%s - failed to allocate neigh!\n",
4059 __func__);
4060 goto free_dst;
4061 }
4062
4063 if (neigh->dev->flags & IFF_LOOPBACK) {
4064 pdev = ip_dev_find(&init_net, iph->daddr);
4065 e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
4066 pdev, 0);
4067 pi = (struct port_info *)netdev_priv(pdev);
4068 tx_chan = cxgb4_port_chan(pdev);
4069 dev_put(pdev);
4070 } else {
4071 pdev = get_real_dev(neigh->dev);
4072 e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
4073 pdev, 0);
4074 pi = (struct port_info *)netdev_priv(pdev);
4075 tx_chan = cxgb4_port_chan(pdev);
4076 }
4077 neigh_release(neigh);
4078 if (!e) {
4079 pr_err("%s - failed to allocate l2t entry!\n",
4080 __func__);
4081 goto free_dst;
4082 }
4083
4084 step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan;
4085 rss_qid = dev->rdev.lldi.rxq_ids[pi->port_id * step];
4086 window = (__force u16) htons((__force u16)tcph->window);
4087
4088 /* Calcuate filter portion for LE region. */
4089 filter = (__force unsigned int) cpu_to_be32(cxgb4_select_ntuple(
4090 dev->rdev.lldi.ports[0],
4091 e));
4092
4093 /*
4094 * Synthesize the cpl_pass_accept_req. We have everything except the
4095 * TID. Once firmware sends a reply with TID we update the TID field
4096 * in cpl and pass it through the regular cpl_pass_accept_req path.
4097 */
4098 build_cpl_pass_accept_req(skb, stid, iph->tos);
4099 send_fw_pass_open_req(dev, skb, iph->daddr, tcph->dest, iph->saddr,
4100 tcph->source, ntohl(tcph->seq), filter, window,
4101 rss_qid, pi->port_id);
4102 cxgb4_l2t_release(e);
4103 free_dst:
4104 dst_release(dst);
4105 reject:
4106 if (lep)
4107 c4iw_put_ep(&lep->com);
4108 return 0;
4109 }
4110
4111 /*
4112 * These are the real handlers that are called from a
4113 * work queue.
4114 */
4115 static c4iw_handler_func work_handlers[NUM_CPL_CMDS + NUM_FAKE_CPLS] = {
4116 [CPL_ACT_ESTABLISH] = act_establish,
4117 [CPL_ACT_OPEN_RPL] = act_open_rpl,
4118 [CPL_RX_DATA] = rx_data,
4119 [CPL_ABORT_RPL_RSS] = abort_rpl,
4120 [CPL_ABORT_RPL] = abort_rpl,
4121 [CPL_PASS_OPEN_RPL] = pass_open_rpl,
4122 [CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl,
4123 [CPL_PASS_ACCEPT_REQ] = pass_accept_req,
4124 [CPL_PASS_ESTABLISH] = pass_establish,
4125 [CPL_PEER_CLOSE] = peer_close,
4126 [CPL_ABORT_REQ_RSS] = peer_abort,
4127 [CPL_CLOSE_CON_RPL] = close_con_rpl,
4128 [CPL_RDMA_TERMINATE] = terminate,
4129 [CPL_FW4_ACK] = fw4_ack,
4130 [CPL_FW6_MSG] = deferred_fw6_msg,
4131 [CPL_RX_PKT] = rx_pkt,
4132 [FAKE_CPL_PUT_EP_SAFE] = _put_ep_safe,
4133 [FAKE_CPL_PASS_PUT_EP_SAFE] = _put_pass_ep_safe
4134 };
4135
4136 static void process_timeout(struct c4iw_ep *ep)
4137 {
4138 struct c4iw_qp_attributes attrs;
4139 int abort = 1;
4140
4141 mutex_lock(&ep->com.mutex);
4142 PDBG("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid,
4143 ep->com.state);
4144 set_bit(TIMEDOUT, &ep->com.history);
4145 switch (ep->com.state) {
4146 case MPA_REQ_SENT:
4147 connect_reply_upcall(ep, -ETIMEDOUT);
4148 break;
4149 case MPA_REQ_WAIT:
4150 case MPA_REQ_RCVD:
4151 case MPA_REP_SENT:
4152 case FPDU_MODE:
4153 break;
4154 case CLOSING:
4155 case MORIBUND:
4156 if (ep->com.cm_id && ep->com.qp) {
4157 attrs.next_state = C4IW_QP_STATE_ERROR;
4158 c4iw_modify_qp(ep->com.qp->rhp,
4159 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
4160 &attrs, 1);
4161 }
4162 close_complete_upcall(ep, -ETIMEDOUT);
4163 break;
4164 case ABORTING:
4165 case DEAD:
4166
4167 /*
4168 * These states are expected if the ep timed out at the same
4169 * time as another thread was calling stop_ep_timer().
4170 * So we silently do nothing for these states.
4171 */
4172 abort = 0;
4173 break;
4174 default:
4175 WARN(1, "%s unexpected state ep %p tid %u state %u\n",
4176 __func__, ep, ep->hwtid, ep->com.state);
4177 abort = 0;
4178 }
4179 mutex_unlock(&ep->com.mutex);
4180 if (abort)
4181 c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
4182 c4iw_put_ep(&ep->com);
4183 }
4184
4185 static void process_timedout_eps(void)
4186 {
4187 struct c4iw_ep *ep;
4188
4189 spin_lock_irq(&timeout_lock);
4190 while (!list_empty(&timeout_list)) {
4191 struct list_head *tmp;
4192
4193 tmp = timeout_list.next;
4194 list_del(tmp);
4195 tmp->next = NULL;
4196 tmp->prev = NULL;
4197 spin_unlock_irq(&timeout_lock);
4198 ep = list_entry(tmp, struct c4iw_ep, entry);
4199 process_timeout(ep);
4200 spin_lock_irq(&timeout_lock);
4201 }
4202 spin_unlock_irq(&timeout_lock);
4203 }
4204
4205 static void process_work(struct work_struct *work)
4206 {
4207 struct sk_buff *skb = NULL;
4208 struct c4iw_dev *dev;
4209 struct cpl_act_establish *rpl;
4210 unsigned int opcode;
4211 int ret;
4212
4213 process_timedout_eps();
4214 while ((skb = skb_dequeue(&rxq))) {
4215 rpl = cplhdr(skb);
4216 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
4217 opcode = rpl->ot.opcode;
4218
4219 BUG_ON(!work_handlers[opcode]);
4220 ret = work_handlers[opcode](dev, skb);
4221 if (!ret)
4222 kfree_skb(skb);
4223 process_timedout_eps();
4224 }
4225 }
4226
4227 static DECLARE_WORK(skb_work, process_work);
4228
4229 static void ep_timeout(unsigned long arg)
4230 {
4231 struct c4iw_ep *ep = (struct c4iw_ep *)arg;
4232 int kickit = 0;
4233
4234 spin_lock(&timeout_lock);
4235 if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
4236 /*
4237 * Only insert if it is not already on the list.
4238 */
4239 if (!ep->entry.next) {
4240 list_add_tail(&ep->entry, &timeout_list);
4241 kickit = 1;
4242 }
4243 }
4244 spin_unlock(&timeout_lock);
4245 if (kickit)
4246 queue_work(workq, &skb_work);
4247 }
4248
4249 /*
4250 * All the CM events are handled on a work queue to have a safe context.
4251 */
4252 static int sched(struct c4iw_dev *dev, struct sk_buff *skb)
4253 {
4254
4255 /*
4256 * Save dev in the skb->cb area.
4257 */
4258 *((struct c4iw_dev **) (skb->cb + sizeof(void *))) = dev;
4259
4260 /*
4261 * Queue the skb and schedule the worker thread.
4262 */
4263 skb_queue_tail(&rxq, skb);
4264 queue_work(workq, &skb_work);
4265 return 0;
4266 }
4267
4268 static int set_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
4269 {
4270 struct cpl_set_tcb_rpl *rpl = cplhdr(skb);
4271
4272 if (rpl->status != CPL_ERR_NONE) {
4273 printk(KERN_ERR MOD "Unexpected SET_TCB_RPL status %u "
4274 "for tid %u\n", rpl->status, GET_TID(rpl));
4275 }
4276 kfree_skb(skb);
4277 return 0;
4278 }
4279
4280 static int fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
4281 {
4282 struct cpl_fw6_msg *rpl = cplhdr(skb);
4283 struct c4iw_wr_wait *wr_waitp;
4284 int ret;
4285
4286 PDBG("%s type %u\n", __func__, rpl->type);
4287
4288 switch (rpl->type) {
4289 case FW6_TYPE_WR_RPL:
4290 ret = (int)((be64_to_cpu(rpl->data[0]) >> 8) & 0xff);
4291 wr_waitp = (struct c4iw_wr_wait *)(__force unsigned long) rpl->data[1];
4292 PDBG("%s wr_waitp %p ret %u\n", __func__, wr_waitp, ret);
4293 if (wr_waitp)
4294 c4iw_wake_up(wr_waitp, ret ? -ret : 0);
4295 kfree_skb(skb);
4296 break;
4297 case FW6_TYPE_CQE:
4298 case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
4299 sched(dev, skb);
4300 break;
4301 default:
4302 printk(KERN_ERR MOD "%s unexpected fw6 msg type %u\n", __func__,
4303 rpl->type);
4304 kfree_skb(skb);
4305 break;
4306 }
4307 return 0;
4308 }
4309
4310 static int peer_abort_intr(struct c4iw_dev *dev, struct sk_buff *skb)
4311 {
4312 struct cpl_abort_req_rss *req = cplhdr(skb);
4313 struct c4iw_ep *ep;
4314 unsigned int tid = GET_TID(req);
4315
4316 ep = get_ep_from_tid(dev, tid);
4317 /* This EP will be dereferenced in peer_abort() */
4318 if (!ep) {
4319 printk(KERN_WARNING MOD
4320 "Abort on non-existent endpoint, tid %d\n", tid);
4321 kfree_skb(skb);
4322 return 0;
4323 }
4324 if (is_neg_adv(req->status)) {
4325 PDBG("%s Negative advice on abort- tid %u status %d (%s)\n",
4326 __func__, ep->hwtid, req->status,
4327 neg_adv_str(req->status));
4328 goto out;
4329 }
4330 PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
4331 ep->com.state);
4332
4333 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
4334 out:
4335 sched(dev, skb);
4336 return 0;
4337 }
4338
4339 /*
4340 * Most upcalls from the T4 Core go to sched() to
4341 * schedule the processing on a work queue.
4342 */
4343 c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS] = {
4344 [CPL_ACT_ESTABLISH] = sched,
4345 [CPL_ACT_OPEN_RPL] = sched,
4346 [CPL_RX_DATA] = sched,
4347 [CPL_ABORT_RPL_RSS] = sched,
4348 [CPL_ABORT_RPL] = sched,
4349 [CPL_PASS_OPEN_RPL] = sched,
4350 [CPL_CLOSE_LISTSRV_RPL] = sched,
4351 [CPL_PASS_ACCEPT_REQ] = sched,
4352 [CPL_PASS_ESTABLISH] = sched,
4353 [CPL_PEER_CLOSE] = sched,
4354 [CPL_CLOSE_CON_RPL] = sched,
4355 [CPL_ABORT_REQ_RSS] = peer_abort_intr,
4356 [CPL_RDMA_TERMINATE] = sched,
4357 [CPL_FW4_ACK] = sched,
4358 [CPL_SET_TCB_RPL] = set_tcb_rpl,
4359 [CPL_FW6_MSG] = fw6_msg,
4360 [CPL_RX_PKT] = sched
4361 };
4362
4363 int __init c4iw_cm_init(void)
4364 {
4365 spin_lock_init(&timeout_lock);
4366 skb_queue_head_init(&rxq);
4367
4368 workq = create_singlethread_workqueue("iw_cxgb4");
4369 if (!workq)
4370 return -ENOMEM;
4371
4372 return 0;
4373 }
4374
4375 void c4iw_cm_term(void)
4376 {
4377 WARN_ON(!list_empty(&timeout_list));
4378 flush_workqueue(workq);
4379 destroy_workqueue(workq);
4380 }
Ubuntu Hirsute Linux kernel mirror