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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 <libcxgb_cm.h>
53#include "iw_cxgb4.h"
54#include "clip_tbl.h"
55
56static char *states[] = {
57 "idle",
58 "listen",
59 "connecting",
60 "mpa_wait_req",
61 "mpa_req_sent",
62 "mpa_req_rcvd",
63 "mpa_rep_sent",
64 "fpdu_mode",
65 "aborting",
66 "closing",
67 "moribund",
68 "dead",
69 NULL,
70};
71
72static int nocong;
73module_param(nocong, int, 0644);
74MODULE_PARM_DESC(nocong, "Turn of congestion control (default=0)");
75
76static int enable_ecn;
77module_param(enable_ecn, int, 0644);
78MODULE_PARM_DESC(enable_ecn, "Enable ECN (default=0/disabled)");
79
80static int dack_mode;
81module_param(dack_mode, int, 0644);
82MODULE_PARM_DESC(dack_mode, "Delayed ack mode (default=0)");
83
84uint c4iw_max_read_depth = 32;
85module_param(c4iw_max_read_depth, int, 0644);
86MODULE_PARM_DESC(c4iw_max_read_depth,
87 "Per-connection max ORD/IRD (default=32)");
88
89static int enable_tcp_timestamps;
90module_param(enable_tcp_timestamps, int, 0644);
91MODULE_PARM_DESC(enable_tcp_timestamps, "Enable tcp timestamps (default=0)");
92
93static int enable_tcp_sack;
94module_param(enable_tcp_sack, int, 0644);
95MODULE_PARM_DESC(enable_tcp_sack, "Enable tcp SACK (default=0)");
96
97static int enable_tcp_window_scaling = 1;
98module_param(enable_tcp_window_scaling, int, 0644);
99MODULE_PARM_DESC(enable_tcp_window_scaling,
100 "Enable tcp window scaling (default=1)");
101
102static int peer2peer = 1;
103module_param(peer2peer, int, 0644);
104MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=1)");
105
106static int p2p_type = FW_RI_INIT_P2PTYPE_READ_REQ;
107module_param(p2p_type, int, 0644);
108MODULE_PARM_DESC(p2p_type, "RDMAP opcode to use for the RTR message: "
109 "1=RDMA_READ 0=RDMA_WRITE (default 1)");
110
111static int ep_timeout_secs = 60;
112module_param(ep_timeout_secs, int, 0644);
113MODULE_PARM_DESC(ep_timeout_secs, "CM Endpoint operation timeout "
114 "in seconds (default=60)");
115
116static int mpa_rev = 2;
117module_param(mpa_rev, int, 0644);
118MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, "
119 "1 is RFC5044 spec compliant, 2 is IETF MPA Peer Connect Draft"
120 " compliant (default=2)");
121
122static int markers_enabled;
123module_param(markers_enabled, int, 0644);
124MODULE_PARM_DESC(markers_enabled, "Enable MPA MARKERS (default(0)=disabled)");
125
126static int crc_enabled = 1;
127module_param(crc_enabled, int, 0644);
128MODULE_PARM_DESC(crc_enabled, "Enable MPA CRC (default(1)=enabled)");
129
130static int rcv_win = 256 * 1024;
131module_param(rcv_win, int, 0644);
132MODULE_PARM_DESC(rcv_win, "TCP receive window in bytes (default=256KB)");
133
134static int snd_win = 128 * 1024;
135module_param(snd_win, int, 0644);
136MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=128KB)");
137
138static struct workqueue_struct *workq;
139
140static struct sk_buff_head rxq;
141
142static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp);
143static void ep_timeout(struct timer_list *t);
144static void connect_reply_upcall(struct c4iw_ep *ep, int status);
145static int sched(struct c4iw_dev *dev, struct sk_buff *skb);
146
147static LIST_HEAD(timeout_list);
148static DEFINE_SPINLOCK(timeout_lock);
149
150static void deref_cm_id(struct c4iw_ep_common *epc)
151{
152 epc->cm_id->rem_ref(epc->cm_id);
153 epc->cm_id = NULL;
154 set_bit(CM_ID_DEREFED, &epc->history);
155}
156
157static void ref_cm_id(struct c4iw_ep_common *epc)
158{
159 set_bit(CM_ID_REFED, &epc->history);
160 epc->cm_id->add_ref(epc->cm_id);
161}
162
163static void deref_qp(struct c4iw_ep *ep)
164{
165 c4iw_qp_rem_ref(&ep->com.qp->ibqp);
166 clear_bit(QP_REFERENCED, &ep->com.flags);
167 set_bit(QP_DEREFED, &ep->com.history);
168}
169
170static void ref_qp(struct c4iw_ep *ep)
171{
172 set_bit(QP_REFERENCED, &ep->com.flags);
173 set_bit(QP_REFED, &ep->com.history);
174 c4iw_qp_add_ref(&ep->com.qp->ibqp);
175}
176
177static void start_ep_timer(struct c4iw_ep *ep)
178{
179 pr_debug("ep %p\n", ep);
180 if (timer_pending(&ep->timer)) {
181 pr_err("%s timer already started! ep %p\n",
182 __func__, ep);
183 return;
184 }
185 clear_bit(TIMEOUT, &ep->com.flags);
186 c4iw_get_ep(&ep->com);
187 ep->timer.expires = jiffies + ep_timeout_secs * HZ;
188 add_timer(&ep->timer);
189}
190
191static int stop_ep_timer(struct c4iw_ep *ep)
192{
193 pr_debug("ep %p stopping\n", ep);
194 del_timer_sync(&ep->timer);
195 if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
196 c4iw_put_ep(&ep->com);
197 return 0;
198 }
199 return 1;
200}
201
202static int c4iw_l2t_send(struct c4iw_rdev *rdev, struct sk_buff *skb,
203 struct l2t_entry *l2e)
204{
205 int error = 0;
206
207 if (c4iw_fatal_error(rdev)) {
208 kfree_skb(skb);
209 pr_err("%s - device in error state - dropping\n", __func__);
210 return -EIO;
211 }
212 error = cxgb4_l2t_send(rdev->lldi.ports[0], skb, l2e);
213 if (error < 0)
214 kfree_skb(skb);
215 else if (error == NET_XMIT_DROP)
216 return -ENOMEM;
217 return error < 0 ? error : 0;
218}
219
220int c4iw_ofld_send(struct c4iw_rdev *rdev, struct sk_buff *skb)
221{
222 int error = 0;
223
224 if (c4iw_fatal_error(rdev)) {
225 kfree_skb(skb);
226 pr_err("%s - device in error state - dropping\n", __func__);
227 return -EIO;
228 }
229 error = cxgb4_ofld_send(rdev->lldi.ports[0], skb);
230 if (error < 0)
231 kfree_skb(skb);
232 return error < 0 ? error : 0;
233}
234
235static void release_tid(struct c4iw_rdev *rdev, u32 hwtid, struct sk_buff *skb)
236{
237 u32 len = roundup(sizeof(struct cpl_tid_release), 16);
238
239 skb = get_skb(skb, len, GFP_KERNEL);
240 if (!skb)
241 return;
242
243 cxgb_mk_tid_release(skb, len, hwtid, 0);
244 c4iw_ofld_send(rdev, skb);
245 return;
246}
247
248static void set_emss(struct c4iw_ep *ep, u16 opt)
249{
250 ep->emss = ep->com.dev->rdev.lldi.mtus[TCPOPT_MSS_G(opt)] -
251 ((AF_INET == ep->com.remote_addr.ss_family) ?
252 sizeof(struct iphdr) : sizeof(struct ipv6hdr)) -
253 sizeof(struct tcphdr);
254 ep->mss = ep->emss;
255 if (TCPOPT_TSTAMP_G(opt))
256 ep->emss -= round_up(TCPOLEN_TIMESTAMP, 4);
257 if (ep->emss < 128)
258 ep->emss = 128;
259 if (ep->emss & 7)
260 pr_debug("Warning: misaligned mtu idx %u mss %u emss=%u\n",
261 TCPOPT_MSS_G(opt), ep->mss, ep->emss);
262 pr_debug("mss_idx %u mss %u emss=%u\n", TCPOPT_MSS_G(opt), ep->mss,
263 ep->emss);
264}
265
266static enum c4iw_ep_state state_read(struct c4iw_ep_common *epc)
267{
268 enum c4iw_ep_state state;
269
270 mutex_lock(&epc->mutex);
271 state = epc->state;
272 mutex_unlock(&epc->mutex);
273 return state;
274}
275
276static void __state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
277{
278 epc->state = new;
279}
280
281static void state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
282{
283 mutex_lock(&epc->mutex);
284 pr_debug("%s -> %s\n", states[epc->state], states[new]);
285 __state_set(epc, new);
286 mutex_unlock(&epc->mutex);
287 return;
288}
289
290static int alloc_ep_skb_list(struct sk_buff_head *ep_skb_list, int size)
291{
292 struct sk_buff *skb;
293 unsigned int i;
294 size_t len;
295
296 len = roundup(sizeof(union cpl_wr_size), 16);
297 for (i = 0; i < size; i++) {
298 skb = alloc_skb(len, GFP_KERNEL);
299 if (!skb)
300 goto fail;
301 skb_queue_tail(ep_skb_list, skb);
302 }
303 return 0;
304fail:
305 skb_queue_purge(ep_skb_list);
306 return -ENOMEM;
307}
308
309static void *alloc_ep(int size, gfp_t gfp)
310{
311 struct c4iw_ep_common *epc;
312
313 epc = kzalloc(size, gfp);
314 if (epc) {
315 epc->wr_waitp = c4iw_alloc_wr_wait(gfp);
316 if (!epc->wr_waitp) {
317 kfree(epc);
318 epc = NULL;
319 goto out;
320 }
321 kref_init(&epc->kref);
322 mutex_init(&epc->mutex);
323 c4iw_init_wr_wait(epc->wr_waitp);
324 }
325 pr_debug("alloc ep %p\n", epc);
326out:
327 return epc;
328}
329
330static void remove_ep_tid(struct c4iw_ep *ep)
331{
332 unsigned long flags;
333
334 xa_lock_irqsave(&ep->com.dev->hwtids, flags);
335 __xa_erase(&ep->com.dev->hwtids, ep->hwtid);
336 if (xa_empty(&ep->com.dev->hwtids))
337 wake_up(&ep->com.dev->wait);
338 xa_unlock_irqrestore(&ep->com.dev->hwtids, flags);
339}
340
341static int insert_ep_tid(struct c4iw_ep *ep)
342{
343 unsigned long flags;
344 int err;
345
346 xa_lock_irqsave(&ep->com.dev->hwtids, flags);
347 err = __xa_insert(&ep->com.dev->hwtids, ep->hwtid, ep, GFP_KERNEL);
348 xa_unlock_irqrestore(&ep->com.dev->hwtids, flags);
349
350 return err;
351}
352
353/*
354 * Atomically lookup the ep ptr given the tid and grab a reference on the ep.
355 */
356static struct c4iw_ep *get_ep_from_tid(struct c4iw_dev *dev, unsigned int tid)
357{
358 struct c4iw_ep *ep;
359 unsigned long flags;
360
361 xa_lock_irqsave(&dev->hwtids, flags);
362 ep = xa_load(&dev->hwtids, tid);
363 if (ep)
364 c4iw_get_ep(&ep->com);
365 xa_unlock_irqrestore(&dev->hwtids, flags);
366 return ep;
367}
368
369/*
370 * Atomically lookup the ep ptr given the stid and grab a reference on the ep.
371 */
372static struct c4iw_listen_ep *get_ep_from_stid(struct c4iw_dev *dev,
373 unsigned int stid)
374{
375 struct c4iw_listen_ep *ep;
376 unsigned long flags;
377
378 xa_lock_irqsave(&dev->stids, flags);
379 ep = xa_load(&dev->stids, stid);
380 if (ep)
381 c4iw_get_ep(&ep->com);
382 xa_unlock_irqrestore(&dev->stids, flags);
383 return ep;
384}
385
386void _c4iw_free_ep(struct kref *kref)
387{
388 struct c4iw_ep *ep;
389
390 ep = container_of(kref, struct c4iw_ep, com.kref);
391 pr_debug("ep %p state %s\n", ep, states[ep->com.state]);
392 if (test_bit(QP_REFERENCED, &ep->com.flags))
393 deref_qp(ep);
394 if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) {
395 if (ep->com.remote_addr.ss_family == AF_INET6) {
396 struct sockaddr_in6 *sin6 =
397 (struct sockaddr_in6 *)
398 &ep->com.local_addr;
399
400 cxgb4_clip_release(
401 ep->com.dev->rdev.lldi.ports[0],
402 (const u32 *)&sin6->sin6_addr.s6_addr,
403 1);
404 }
405 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid,
406 ep->com.local_addr.ss_family);
407 dst_release(ep->dst);
408 cxgb4_l2t_release(ep->l2t);
409 kfree_skb(ep->mpa_skb);
410 }
411 if (!skb_queue_empty(&ep->com.ep_skb_list))
412 skb_queue_purge(&ep->com.ep_skb_list);
413 c4iw_put_wr_wait(ep->com.wr_waitp);
414 kfree(ep);
415}
416
417static void release_ep_resources(struct c4iw_ep *ep)
418{
419 set_bit(RELEASE_RESOURCES, &ep->com.flags);
420
421 /*
422 * If we have a hwtid, then remove it from the idr table
423 * so lookups will no longer find this endpoint. Otherwise
424 * we have a race where one thread finds the ep ptr just
425 * before the other thread is freeing the ep memory.
426 */
427 if (ep->hwtid != -1)
428 remove_ep_tid(ep);
429 c4iw_put_ep(&ep->com);
430}
431
432static int status2errno(int status)
433{
434 switch (status) {
435 case CPL_ERR_NONE:
436 return 0;
437 case CPL_ERR_CONN_RESET:
438 return -ECONNRESET;
439 case CPL_ERR_ARP_MISS:
440 return -EHOSTUNREACH;
441 case CPL_ERR_CONN_TIMEDOUT:
442 return -ETIMEDOUT;
443 case CPL_ERR_TCAM_FULL:
444 return -ENOMEM;
445 case CPL_ERR_CONN_EXIST:
446 return -EADDRINUSE;
447 default:
448 return -EIO;
449 }
450}
451
452/*
453 * Try and reuse skbs already allocated...
454 */
455static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp)
456{
457 if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) {
458 skb_trim(skb, 0);
459 skb_get(skb);
460 skb_reset_transport_header(skb);
461 } else {
462 skb = alloc_skb(len, gfp);
463 if (!skb)
464 return NULL;
465 }
466 t4_set_arp_err_handler(skb, NULL, NULL);
467 return skb;
468}
469
470static struct net_device *get_real_dev(struct net_device *egress_dev)
471{
472 return rdma_vlan_dev_real_dev(egress_dev) ? : egress_dev;
473}
474
475static void arp_failure_discard(void *handle, struct sk_buff *skb)
476{
477 pr_err("ARP failure\n");
478 kfree_skb(skb);
479}
480
481static void mpa_start_arp_failure(void *handle, struct sk_buff *skb)
482{
483 pr_err("ARP failure during MPA Negotiation - Closing Connection\n");
484}
485
486enum {
487 NUM_FAKE_CPLS = 2,
488 FAKE_CPL_PUT_EP_SAFE = NUM_CPL_CMDS + 0,
489 FAKE_CPL_PASS_PUT_EP_SAFE = NUM_CPL_CMDS + 1,
490};
491
492static int _put_ep_safe(struct c4iw_dev *dev, struct sk_buff *skb)
493{
494 struct c4iw_ep *ep;
495
496 ep = *((struct c4iw_ep **)(skb->cb + 2 * sizeof(void *)));
497 release_ep_resources(ep);
498 return 0;
499}
500
501static int _put_pass_ep_safe(struct c4iw_dev *dev, struct sk_buff *skb)
502{
503 struct c4iw_ep *ep;
504
505 ep = *((struct c4iw_ep **)(skb->cb + 2 * sizeof(void *)));
506 c4iw_put_ep(&ep->parent_ep->com);
507 release_ep_resources(ep);
508 return 0;
509}
510
511/*
512 * Fake up a special CPL opcode and call sched() so process_work() will call
513 * _put_ep_safe() in a safe context to free the ep resources. This is needed
514 * because ARP error handlers are called in an ATOMIC context, and
515 * _c4iw_free_ep() needs to block.
516 */
517static void queue_arp_failure_cpl(struct c4iw_ep *ep, struct sk_buff *skb,
518 int cpl)
519{
520 struct cpl_act_establish *rpl = cplhdr(skb);
521
522 /* Set our special ARP_FAILURE opcode */
523 rpl->ot.opcode = cpl;
524
525 /*
526 * Save ep in the skb->cb area, after where sched() will save the dev
527 * ptr.
528 */
529 *((struct c4iw_ep **)(skb->cb + 2 * sizeof(void *))) = ep;
530 sched(ep->com.dev, skb);
531}
532
533/* Handle an ARP failure for an accept */
534static void pass_accept_rpl_arp_failure(void *handle, struct sk_buff *skb)
535{
536 struct c4iw_ep *ep = handle;
537
538 pr_err("ARP failure during accept - tid %u - dropping connection\n",
539 ep->hwtid);
540
541 __state_set(&ep->com, DEAD);
542 queue_arp_failure_cpl(ep, skb, FAKE_CPL_PASS_PUT_EP_SAFE);
543}
544
545/*
546 * Handle an ARP failure for an active open.
547 */
548static void act_open_req_arp_failure(void *handle, struct sk_buff *skb)
549{
550 struct c4iw_ep *ep = handle;
551
552 pr_err("ARP failure during connect\n");
553 connect_reply_upcall(ep, -EHOSTUNREACH);
554 __state_set(&ep->com, DEAD);
555 if (ep->com.remote_addr.ss_family == AF_INET6) {
556 struct sockaddr_in6 *sin6 =
557 (struct sockaddr_in6 *)&ep->com.local_addr;
558 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
559 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
560 }
561 xa_erase_irq(&ep->com.dev->atids, ep->atid);
562 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
563 queue_arp_failure_cpl(ep, skb, FAKE_CPL_PUT_EP_SAFE);
564}
565
566/*
567 * Handle an ARP failure for a CPL_ABORT_REQ. Change it into a no RST variant
568 * and send it along.
569 */
570static void abort_arp_failure(void *handle, struct sk_buff *skb)
571{
572 int ret;
573 struct c4iw_ep *ep = handle;
574 struct c4iw_rdev *rdev = &ep->com.dev->rdev;
575 struct cpl_abort_req *req = cplhdr(skb);
576
577 pr_debug("rdev %p\n", rdev);
578 req->cmd = CPL_ABORT_NO_RST;
579 skb_get(skb);
580 ret = c4iw_ofld_send(rdev, skb);
581 if (ret) {
582 __state_set(&ep->com, DEAD);
583 queue_arp_failure_cpl(ep, skb, FAKE_CPL_PUT_EP_SAFE);
584 } else
585 kfree_skb(skb);
586}
587
588static int send_flowc(struct c4iw_ep *ep)
589{
590 struct fw_flowc_wr *flowc;
591 struct sk_buff *skb = skb_dequeue(&ep->com.ep_skb_list);
592 u16 vlan = ep->l2t->vlan;
593 int nparams;
594 int flowclen, flowclen16;
595
596 if (WARN_ON(!skb))
597 return -ENOMEM;
598
599 if (vlan == CPL_L2T_VLAN_NONE)
600 nparams = 9;
601 else
602 nparams = 10;
603
604 flowclen = offsetof(struct fw_flowc_wr, mnemval[nparams]);
605 flowclen16 = DIV_ROUND_UP(flowclen, 16);
606 flowclen = flowclen16 * 16;
607
608 flowc = __skb_put(skb, flowclen);
609 memset(flowc, 0, flowclen);
610
611 flowc->op_to_nparams = cpu_to_be32(FW_WR_OP_V(FW_FLOWC_WR) |
612 FW_FLOWC_WR_NPARAMS_V(nparams));
613 flowc->flowid_len16 = cpu_to_be32(FW_WR_LEN16_V(flowclen16) |
614 FW_WR_FLOWID_V(ep->hwtid));
615
616 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
617 flowc->mnemval[0].val = cpu_to_be32(FW_PFVF_CMD_PFN_V
618 (ep->com.dev->rdev.lldi.pf));
619 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
620 flowc->mnemval[1].val = cpu_to_be32(ep->tx_chan);
621 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
622 flowc->mnemval[2].val = cpu_to_be32(ep->tx_chan);
623 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
624 flowc->mnemval[3].val = cpu_to_be32(ep->rss_qid);
625 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
626 flowc->mnemval[4].val = cpu_to_be32(ep->snd_seq);
627 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
628 flowc->mnemval[5].val = cpu_to_be32(ep->rcv_seq);
629 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
630 flowc->mnemval[6].val = cpu_to_be32(ep->snd_win);
631 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
632 flowc->mnemval[7].val = cpu_to_be32(ep->emss);
633 flowc->mnemval[8].mnemonic = FW_FLOWC_MNEM_RCV_SCALE;
634 flowc->mnemval[8].val = cpu_to_be32(ep->snd_wscale);
635 if (nparams == 10) {
636 u16 pri;
637 pri = (vlan & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
638 flowc->mnemval[9].mnemonic = FW_FLOWC_MNEM_SCHEDCLASS;
639 flowc->mnemval[9].val = cpu_to_be32(pri);
640 }
641
642 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
643 return c4iw_ofld_send(&ep->com.dev->rdev, skb);
644}
645
646static int send_halfclose(struct c4iw_ep *ep)
647{
648 struct sk_buff *skb = skb_dequeue(&ep->com.ep_skb_list);
649 u32 wrlen = roundup(sizeof(struct cpl_close_con_req), 16);
650
651 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
652 if (WARN_ON(!skb))
653 return -ENOMEM;
654
655 cxgb_mk_close_con_req(skb, wrlen, ep->hwtid, ep->txq_idx,
656 NULL, arp_failure_discard);
657
658 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
659}
660
661static void read_tcb(struct c4iw_ep *ep)
662{
663 struct sk_buff *skb;
664 struct cpl_get_tcb *req;
665 int wrlen = roundup(sizeof(*req), 16);
666
667 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
668 if (WARN_ON(!skb))
669 return;
670
671 set_wr_txq(skb, CPL_PRIORITY_CONTROL, ep->ctrlq_idx);
672 req = (struct cpl_get_tcb *) skb_put(skb, wrlen);
673 memset(req, 0, wrlen);
674 INIT_TP_WR(req, ep->hwtid);
675 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_GET_TCB, ep->hwtid));
676 req->reply_ctrl = htons(REPLY_CHAN_V(0) | QUEUENO_V(ep->rss_qid));
677
678 /*
679 * keep a ref on the ep so the tcb is not unlocked before this
680 * cpl completes. The ref is released in read_tcb_rpl().
681 */
682 c4iw_get_ep(&ep->com);
683 if (WARN_ON(c4iw_ofld_send(&ep->com.dev->rdev, skb)))
684 c4iw_put_ep(&ep->com);
685}
686
687static int send_abort_req(struct c4iw_ep *ep)
688{
689 u32 wrlen = roundup(sizeof(struct cpl_abort_req), 16);
690 struct sk_buff *req_skb = skb_dequeue(&ep->com.ep_skb_list);
691
692 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
693 if (WARN_ON(!req_skb))
694 return -ENOMEM;
695
696 cxgb_mk_abort_req(req_skb, wrlen, ep->hwtid, ep->txq_idx,
697 ep, abort_arp_failure);
698
699 return c4iw_l2t_send(&ep->com.dev->rdev, req_skb, ep->l2t);
700}
701
702static int send_abort(struct c4iw_ep *ep)
703{
704 if (!ep->com.qp || !ep->com.qp->srq) {
705 send_abort_req(ep);
706 return 0;
707 }
708 set_bit(ABORT_REQ_IN_PROGRESS, &ep->com.flags);
709 read_tcb(ep);
710 return 0;
711}
712
713static int send_connect(struct c4iw_ep *ep)
714{
715 struct cpl_act_open_req *req = NULL;
716 struct cpl_t5_act_open_req *t5req = NULL;
717 struct cpl_t6_act_open_req *t6req = NULL;
718 struct cpl_act_open_req6 *req6 = NULL;
719 struct cpl_t5_act_open_req6 *t5req6 = NULL;
720 struct cpl_t6_act_open_req6 *t6req6 = NULL;
721 struct sk_buff *skb;
722 u64 opt0;
723 u32 opt2;
724 unsigned int mtu_idx;
725 u32 wscale;
726 int win, sizev4, sizev6, wrlen;
727 struct sockaddr_in *la = (struct sockaddr_in *)
728 &ep->com.local_addr;
729 struct sockaddr_in *ra = (struct sockaddr_in *)
730 &ep->com.remote_addr;
731 struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)
732 &ep->com.local_addr;
733 struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)
734 &ep->com.remote_addr;
735 int ret;
736 enum chip_type adapter_type = ep->com.dev->rdev.lldi.adapter_type;
737 u32 isn = (get_random_u32() & ~7UL) - 1;
738 struct net_device *netdev;
739 u64 params;
740
741 netdev = ep->com.dev->rdev.lldi.ports[0];
742
743 switch (CHELSIO_CHIP_VERSION(adapter_type)) {
744 case CHELSIO_T4:
745 sizev4 = sizeof(struct cpl_act_open_req);
746 sizev6 = sizeof(struct cpl_act_open_req6);
747 break;
748 case CHELSIO_T5:
749 sizev4 = sizeof(struct cpl_t5_act_open_req);
750 sizev6 = sizeof(struct cpl_t5_act_open_req6);
751 break;
752 case CHELSIO_T6:
753 sizev4 = sizeof(struct cpl_t6_act_open_req);
754 sizev6 = sizeof(struct cpl_t6_act_open_req6);
755 break;
756 default:
757 pr_err("T%d Chip is not supported\n",
758 CHELSIO_CHIP_VERSION(adapter_type));
759 return -EINVAL;
760 }
761
762 wrlen = (ep->com.remote_addr.ss_family == AF_INET) ?
763 roundup(sizev4, 16) :
764 roundup(sizev6, 16);
765
766 pr_debug("ep %p atid %u\n", ep, ep->atid);
767
768 skb = get_skb(NULL, wrlen, GFP_KERNEL);
769 if (!skb) {
770 pr_err("%s - failed to alloc skb\n", __func__);
771 return -ENOMEM;
772 }
773 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
774
775 cxgb_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
776 enable_tcp_timestamps,
777 (ep->com.remote_addr.ss_family == AF_INET) ? 0 : 1);
778 wscale = cxgb_compute_wscale(rcv_win);
779
780 /*
781 * Specify the largest window that will fit in opt0. The
782 * remainder will be specified in the rx_data_ack.
783 */
784 win = ep->rcv_win >> 10;
785 if (win > RCV_BUFSIZ_M)
786 win = RCV_BUFSIZ_M;
787
788 opt0 = (nocong ? NO_CONG_F : 0) |
789 KEEP_ALIVE_F |
790 DELACK_F |
791 WND_SCALE_V(wscale) |
792 MSS_IDX_V(mtu_idx) |
793 L2T_IDX_V(ep->l2t->idx) |
794 TX_CHAN_V(ep->tx_chan) |
795 SMAC_SEL_V(ep->smac_idx) |
796 DSCP_V(ep->tos >> 2) |
797 ULP_MODE_V(ULP_MODE_TCPDDP) |
798 RCV_BUFSIZ_V(win);
799 opt2 = RX_CHANNEL_V(0) |
800 CCTRL_ECN_V(enable_ecn) |
801 RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid);
802 if (enable_tcp_timestamps)
803 opt2 |= TSTAMPS_EN_F;
804 if (enable_tcp_sack)
805 opt2 |= SACK_EN_F;
806 if (wscale && enable_tcp_window_scaling)
807 opt2 |= WND_SCALE_EN_F;
808 if (CHELSIO_CHIP_VERSION(adapter_type) > CHELSIO_T4) {
809 if (peer2peer)
810 isn += 4;
811
812 opt2 |= T5_OPT_2_VALID_F;
813 opt2 |= CONG_CNTRL_V(CONG_ALG_TAHOE);
814 opt2 |= T5_ISS_F;
815 }
816
817 params = cxgb4_select_ntuple(netdev, ep->l2t);
818
819 if (ep->com.remote_addr.ss_family == AF_INET6)
820 cxgb4_clip_get(ep->com.dev->rdev.lldi.ports[0],
821 (const u32 *)&la6->sin6_addr.s6_addr, 1);
822
823 t4_set_arp_err_handler(skb, ep, act_open_req_arp_failure);
824
825 if (ep->com.remote_addr.ss_family == AF_INET) {
826 switch (CHELSIO_CHIP_VERSION(adapter_type)) {
827 case CHELSIO_T4:
828 req = skb_put(skb, wrlen);
829 INIT_TP_WR(req, 0);
830 break;
831 case CHELSIO_T5:
832 t5req = skb_put(skb, wrlen);
833 INIT_TP_WR(t5req, 0);
834 req = (struct cpl_act_open_req *)t5req;
835 break;
836 case CHELSIO_T6:
837 t6req = skb_put(skb, wrlen);
838 INIT_TP_WR(t6req, 0);
839 req = (struct cpl_act_open_req *)t6req;
840 t5req = (struct cpl_t5_act_open_req *)t6req;
841 break;
842 default:
843 pr_err("T%d Chip is not supported\n",
844 CHELSIO_CHIP_VERSION(adapter_type));
845 ret = -EINVAL;
846 goto clip_release;
847 }
848
849 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
850 ((ep->rss_qid<<14) | ep->atid)));
851 req->local_port = la->sin_port;
852 req->peer_port = ra->sin_port;
853 req->local_ip = la->sin_addr.s_addr;
854 req->peer_ip = ra->sin_addr.s_addr;
855 req->opt0 = cpu_to_be64(opt0);
856
857 if (is_t4(ep->com.dev->rdev.lldi.adapter_type)) {
858 req->params = cpu_to_be32(params);
859 req->opt2 = cpu_to_be32(opt2);
860 } else {
861 if (is_t5(ep->com.dev->rdev.lldi.adapter_type)) {
862 t5req->params =
863 cpu_to_be64(FILTER_TUPLE_V(params));
864 t5req->rsvd = cpu_to_be32(isn);
865 pr_debug("snd_isn %u\n", t5req->rsvd);
866 t5req->opt2 = cpu_to_be32(opt2);
867 } else {
868 t6req->params =
869 cpu_to_be64(FILTER_TUPLE_V(params));
870 t6req->rsvd = cpu_to_be32(isn);
871 pr_debug("snd_isn %u\n", t6req->rsvd);
872 t6req->opt2 = cpu_to_be32(opt2);
873 }
874 }
875 } else {
876 switch (CHELSIO_CHIP_VERSION(adapter_type)) {
877 case CHELSIO_T4:
878 req6 = skb_put(skb, wrlen);
879 INIT_TP_WR(req6, 0);
880 break;
881 case CHELSIO_T5:
882 t5req6 = skb_put(skb, wrlen);
883 INIT_TP_WR(t5req6, 0);
884 req6 = (struct cpl_act_open_req6 *)t5req6;
885 break;
886 case CHELSIO_T6:
887 t6req6 = skb_put(skb, wrlen);
888 INIT_TP_WR(t6req6, 0);
889 req6 = (struct cpl_act_open_req6 *)t6req6;
890 t5req6 = (struct cpl_t5_act_open_req6 *)t6req6;
891 break;
892 default:
893 pr_err("T%d Chip is not supported\n",
894 CHELSIO_CHIP_VERSION(adapter_type));
895 ret = -EINVAL;
896 goto clip_release;
897 }
898
899 OPCODE_TID(req6) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
900 ((ep->rss_qid<<14)|ep->atid)));
901 req6->local_port = la6->sin6_port;
902 req6->peer_port = ra6->sin6_port;
903 req6->local_ip_hi = *((__be64 *)(la6->sin6_addr.s6_addr));
904 req6->local_ip_lo = *((__be64 *)(la6->sin6_addr.s6_addr + 8));
905 req6->peer_ip_hi = *((__be64 *)(ra6->sin6_addr.s6_addr));
906 req6->peer_ip_lo = *((__be64 *)(ra6->sin6_addr.s6_addr + 8));
907 req6->opt0 = cpu_to_be64(opt0);
908
909 if (is_t4(ep->com.dev->rdev.lldi.adapter_type)) {
910 req6->params = cpu_to_be32(cxgb4_select_ntuple(netdev,
911 ep->l2t));
912 req6->opt2 = cpu_to_be32(opt2);
913 } else {
914 if (is_t5(ep->com.dev->rdev.lldi.adapter_type)) {
915 t5req6->params =
916 cpu_to_be64(FILTER_TUPLE_V(params));
917 t5req6->rsvd = cpu_to_be32(isn);
918 pr_debug("snd_isn %u\n", t5req6->rsvd);
919 t5req6->opt2 = cpu_to_be32(opt2);
920 } else {
921 t6req6->params =
922 cpu_to_be64(FILTER_TUPLE_V(params));
923 t6req6->rsvd = cpu_to_be32(isn);
924 pr_debug("snd_isn %u\n", t6req6->rsvd);
925 t6req6->opt2 = cpu_to_be32(opt2);
926 }
927
928 }
929 }
930
931 set_bit(ACT_OPEN_REQ, &ep->com.history);
932 ret = c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
933clip_release:
934 if (ret && ep->com.remote_addr.ss_family == AF_INET6)
935 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
936 (const u32 *)&la6->sin6_addr.s6_addr, 1);
937 return ret;
938}
939
940static int send_mpa_req(struct c4iw_ep *ep, struct sk_buff *skb,
941 u8 mpa_rev_to_use)
942{
943 int mpalen, wrlen, ret;
944 struct fw_ofld_tx_data_wr *req;
945 struct mpa_message *mpa;
946 struct mpa_v2_conn_params mpa_v2_params;
947
948 pr_debug("ep %p tid %u pd_len %d\n",
949 ep, ep->hwtid, ep->plen);
950
951 mpalen = sizeof(*mpa) + ep->plen;
952 if (mpa_rev_to_use == 2)
953 mpalen += sizeof(struct mpa_v2_conn_params);
954 wrlen = roundup(mpalen + sizeof(*req), 16);
955 skb = get_skb(skb, wrlen, GFP_KERNEL);
956 if (!skb) {
957 connect_reply_upcall(ep, -ENOMEM);
958 return -ENOMEM;
959 }
960 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
961
962 req = skb_put_zero(skb, wrlen);
963 req->op_to_immdlen = cpu_to_be32(
964 FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
965 FW_WR_COMPL_F |
966 FW_WR_IMMDLEN_V(mpalen));
967 req->flowid_len16 = cpu_to_be32(
968 FW_WR_FLOWID_V(ep->hwtid) |
969 FW_WR_LEN16_V(wrlen >> 4));
970 req->plen = cpu_to_be32(mpalen);
971 req->tunnel_to_proxy = cpu_to_be32(
972 FW_OFLD_TX_DATA_WR_FLUSH_F |
973 FW_OFLD_TX_DATA_WR_SHOVE_F);
974
975 mpa = (struct mpa_message *)(req + 1);
976 memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
977
978 mpa->flags = 0;
979 if (crc_enabled)
980 mpa->flags |= MPA_CRC;
981 if (markers_enabled) {
982 mpa->flags |= MPA_MARKERS;
983 ep->mpa_attr.recv_marker_enabled = 1;
984 } else {
985 ep->mpa_attr.recv_marker_enabled = 0;
986 }
987 if (mpa_rev_to_use == 2)
988 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
989
990 mpa->private_data_size = htons(ep->plen);
991 mpa->revision = mpa_rev_to_use;
992 if (mpa_rev_to_use == 1) {
993 ep->tried_with_mpa_v1 = 1;
994 ep->retry_with_mpa_v1 = 0;
995 }
996
997 if (mpa_rev_to_use == 2) {
998 mpa->private_data_size =
999 htons(ntohs(mpa->private_data_size) +
1000 sizeof(struct mpa_v2_conn_params));
1001 pr_debug("initiator ird %u ord %u\n", ep->ird,
1002 ep->ord);
1003 mpa_v2_params.ird = htons((u16)ep->ird);
1004 mpa_v2_params.ord = htons((u16)ep->ord);
1005
1006 if (peer2peer) {
1007 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
1008 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
1009 mpa_v2_params.ord |=
1010 htons(MPA_V2_RDMA_WRITE_RTR);
1011 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
1012 mpa_v2_params.ord |=
1013 htons(MPA_V2_RDMA_READ_RTR);
1014 }
1015 memcpy(mpa->private_data, &mpa_v2_params,
1016 sizeof(struct mpa_v2_conn_params));
1017
1018 if (ep->plen)
1019 memcpy(mpa->private_data +
1020 sizeof(struct mpa_v2_conn_params),
1021 ep->mpa_pkt + sizeof(*mpa), ep->plen);
1022 } else
1023 if (ep->plen)
1024 memcpy(mpa->private_data,
1025 ep->mpa_pkt + sizeof(*mpa), ep->plen);
1026
1027 /*
1028 * Reference the mpa skb. This ensures the data area
1029 * will remain in memory until the hw acks the tx.
1030 * Function fw4_ack() will deref it.
1031 */
1032 skb_get(skb);
1033 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
1034 ep->mpa_skb = skb;
1035 ret = c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1036 if (ret)
1037 return ret;
1038 start_ep_timer(ep);
1039 __state_set(&ep->com, MPA_REQ_SENT);
1040 ep->mpa_attr.initiator = 1;
1041 ep->snd_seq += mpalen;
1042 return ret;
1043}
1044
1045static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen)
1046{
1047 int mpalen, wrlen;
1048 struct fw_ofld_tx_data_wr *req;
1049 struct mpa_message *mpa;
1050 struct sk_buff *skb;
1051 struct mpa_v2_conn_params mpa_v2_params;
1052
1053 pr_debug("ep %p tid %u pd_len %d\n",
1054 ep, ep->hwtid, ep->plen);
1055
1056 mpalen = sizeof(*mpa) + plen;
1057 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
1058 mpalen += sizeof(struct mpa_v2_conn_params);
1059 wrlen = roundup(mpalen + sizeof(*req), 16);
1060
1061 skb = get_skb(NULL, wrlen, GFP_KERNEL);
1062 if (!skb) {
1063 pr_err("%s - cannot alloc skb!\n", __func__);
1064 return -ENOMEM;
1065 }
1066 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
1067
1068 req = skb_put_zero(skb, wrlen);
1069 req->op_to_immdlen = cpu_to_be32(
1070 FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
1071 FW_WR_COMPL_F |
1072 FW_WR_IMMDLEN_V(mpalen));
1073 req->flowid_len16 = cpu_to_be32(
1074 FW_WR_FLOWID_V(ep->hwtid) |
1075 FW_WR_LEN16_V(wrlen >> 4));
1076 req->plen = cpu_to_be32(mpalen);
1077 req->tunnel_to_proxy = cpu_to_be32(
1078 FW_OFLD_TX_DATA_WR_FLUSH_F |
1079 FW_OFLD_TX_DATA_WR_SHOVE_F);
1080
1081 mpa = (struct mpa_message *)(req + 1);
1082 memset(mpa, 0, sizeof(*mpa));
1083 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
1084 mpa->flags = MPA_REJECT;
1085 mpa->revision = ep->mpa_attr.version;
1086 mpa->private_data_size = htons(plen);
1087
1088 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
1089 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
1090 mpa->private_data_size =
1091 htons(ntohs(mpa->private_data_size) +
1092 sizeof(struct mpa_v2_conn_params));
1093 mpa_v2_params.ird = htons(((u16)ep->ird) |
1094 (peer2peer ? MPA_V2_PEER2PEER_MODEL :
1095 0));
1096 mpa_v2_params.ord = htons(((u16)ep->ord) | (peer2peer ?
1097 (p2p_type ==
1098 FW_RI_INIT_P2PTYPE_RDMA_WRITE ?
1099 MPA_V2_RDMA_WRITE_RTR : p2p_type ==
1100 FW_RI_INIT_P2PTYPE_READ_REQ ?
1101 MPA_V2_RDMA_READ_RTR : 0) : 0));
1102 memcpy(mpa->private_data, &mpa_v2_params,
1103 sizeof(struct mpa_v2_conn_params));
1104
1105 if (ep->plen)
1106 memcpy(mpa->private_data +
1107 sizeof(struct mpa_v2_conn_params), pdata, plen);
1108 } else
1109 if (plen)
1110 memcpy(mpa->private_data, pdata, plen);
1111
1112 /*
1113 * Reference the mpa skb again. This ensures the data area
1114 * will remain in memory until the hw acks the tx.
1115 * Function fw4_ack() will deref it.
1116 */
1117 skb_get(skb);
1118 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
1119 t4_set_arp_err_handler(skb, NULL, mpa_start_arp_failure);
1120 ep->mpa_skb = skb;
1121 ep->snd_seq += mpalen;
1122 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1123}
1124
1125static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen)
1126{
1127 int mpalen, wrlen;
1128 struct fw_ofld_tx_data_wr *req;
1129 struct mpa_message *mpa;
1130 struct sk_buff *skb;
1131 struct mpa_v2_conn_params mpa_v2_params;
1132
1133 pr_debug("ep %p tid %u pd_len %d\n",
1134 ep, ep->hwtid, ep->plen);
1135
1136 mpalen = sizeof(*mpa) + plen;
1137 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
1138 mpalen += sizeof(struct mpa_v2_conn_params);
1139 wrlen = roundup(mpalen + sizeof(*req), 16);
1140
1141 skb = get_skb(NULL, wrlen, GFP_KERNEL);
1142 if (!skb) {
1143 pr_err("%s - cannot alloc skb!\n", __func__);
1144 return -ENOMEM;
1145 }
1146 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
1147
1148 req = skb_put_zero(skb, wrlen);
1149 req->op_to_immdlen = cpu_to_be32(
1150 FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
1151 FW_WR_COMPL_F |
1152 FW_WR_IMMDLEN_V(mpalen));
1153 req->flowid_len16 = cpu_to_be32(
1154 FW_WR_FLOWID_V(ep->hwtid) |
1155 FW_WR_LEN16_V(wrlen >> 4));
1156 req->plen = cpu_to_be32(mpalen);
1157 req->tunnel_to_proxy = cpu_to_be32(
1158 FW_OFLD_TX_DATA_WR_FLUSH_F |
1159 FW_OFLD_TX_DATA_WR_SHOVE_F);
1160
1161 mpa = (struct mpa_message *)(req + 1);
1162 memset(mpa, 0, sizeof(*mpa));
1163 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
1164 mpa->flags = 0;
1165 if (ep->mpa_attr.crc_enabled)
1166 mpa->flags |= MPA_CRC;
1167 if (ep->mpa_attr.recv_marker_enabled)
1168 mpa->flags |= MPA_MARKERS;
1169 mpa->revision = ep->mpa_attr.version;
1170 mpa->private_data_size = htons(plen);
1171
1172 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
1173 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
1174 mpa->private_data_size =
1175 htons(ntohs(mpa->private_data_size) +
1176 sizeof(struct mpa_v2_conn_params));
1177 mpa_v2_params.ird = htons((u16)ep->ird);
1178 mpa_v2_params.ord = htons((u16)ep->ord);
1179 if (peer2peer && (ep->mpa_attr.p2p_type !=
1180 FW_RI_INIT_P2PTYPE_DISABLED)) {
1181 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
1182
1183 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
1184 mpa_v2_params.ord |=
1185 htons(MPA_V2_RDMA_WRITE_RTR);
1186 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
1187 mpa_v2_params.ord |=
1188 htons(MPA_V2_RDMA_READ_RTR);
1189 }
1190
1191 memcpy(mpa->private_data, &mpa_v2_params,
1192 sizeof(struct mpa_v2_conn_params));
1193
1194 if (ep->plen)
1195 memcpy(mpa->private_data +
1196 sizeof(struct mpa_v2_conn_params), pdata, plen);
1197 } else
1198 if (plen)
1199 memcpy(mpa->private_data, pdata, plen);
1200
1201 /*
1202 * Reference the mpa skb. This ensures the data area
1203 * will remain in memory until the hw acks the tx.
1204 * Function fw4_ack() will deref it.
1205 */
1206 skb_get(skb);
1207 t4_set_arp_err_handler(skb, NULL, mpa_start_arp_failure);
1208 ep->mpa_skb = skb;
1209 __state_set(&ep->com, MPA_REP_SENT);
1210 ep->snd_seq += mpalen;
1211 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1212}
1213
1214static int act_establish(struct c4iw_dev *dev, struct sk_buff *skb)
1215{
1216 struct c4iw_ep *ep;
1217 struct cpl_act_establish *req = cplhdr(skb);
1218 unsigned short tcp_opt = ntohs(req->tcp_opt);
1219 unsigned int tid = GET_TID(req);
1220 unsigned int atid = TID_TID_G(ntohl(req->tos_atid));
1221 struct tid_info *t = dev->rdev.lldi.tids;
1222 int ret;
1223
1224 ep = lookup_atid(t, atid);
1225
1226 pr_debug("ep %p tid %u snd_isn %u rcv_isn %u\n", ep, tid,
1227 be32_to_cpu(req->snd_isn), be32_to_cpu(req->rcv_isn));
1228
1229 mutex_lock(&ep->com.mutex);
1230 dst_confirm(ep->dst);
1231
1232 /* setup the hwtid for this connection */
1233 ep->hwtid = tid;
1234 cxgb4_insert_tid(t, ep, tid, ep->com.local_addr.ss_family);
1235 insert_ep_tid(ep);
1236
1237 ep->snd_seq = be32_to_cpu(req->snd_isn);
1238 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
1239 ep->snd_wscale = TCPOPT_SND_WSCALE_G(tcp_opt);
1240
1241 set_emss(ep, tcp_opt);
1242
1243 /* dealloc the atid */
1244 xa_erase_irq(&ep->com.dev->atids, atid);
1245 cxgb4_free_atid(t, atid);
1246 set_bit(ACT_ESTAB, &ep->com.history);
1247
1248 /* start MPA negotiation */
1249 ret = send_flowc(ep);
1250 if (ret)
1251 goto err;
1252 if (ep->retry_with_mpa_v1)
1253 ret = send_mpa_req(ep, skb, 1);
1254 else
1255 ret = send_mpa_req(ep, skb, mpa_rev);
1256 if (ret)
1257 goto err;
1258 mutex_unlock(&ep->com.mutex);
1259 return 0;
1260err:
1261 mutex_unlock(&ep->com.mutex);
1262 connect_reply_upcall(ep, -ENOMEM);
1263 c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
1264 return 0;
1265}
1266
1267static void close_complete_upcall(struct c4iw_ep *ep, int status)
1268{
1269 struct iw_cm_event event;
1270
1271 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
1272 memset(&event, 0, sizeof(event));
1273 event.event = IW_CM_EVENT_CLOSE;
1274 event.status = status;
1275 if (ep->com.cm_id) {
1276 pr_debug("close complete delivered ep %p cm_id %p tid %u\n",
1277 ep, ep->com.cm_id, ep->hwtid);
1278 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1279 deref_cm_id(&ep->com);
1280 set_bit(CLOSE_UPCALL, &ep->com.history);
1281 }
1282}
1283
1284static void peer_close_upcall(struct c4iw_ep *ep)
1285{
1286 struct iw_cm_event event;
1287
1288 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
1289 memset(&event, 0, sizeof(event));
1290 event.event = IW_CM_EVENT_DISCONNECT;
1291 if (ep->com.cm_id) {
1292 pr_debug("peer close delivered ep %p cm_id %p tid %u\n",
1293 ep, ep->com.cm_id, ep->hwtid);
1294 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1295 set_bit(DISCONN_UPCALL, &ep->com.history);
1296 }
1297}
1298
1299static void peer_abort_upcall(struct c4iw_ep *ep)
1300{
1301 struct iw_cm_event event;
1302
1303 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
1304 memset(&event, 0, sizeof(event));
1305 event.event = IW_CM_EVENT_CLOSE;
1306 event.status = -ECONNRESET;
1307 if (ep->com.cm_id) {
1308 pr_debug("abort delivered ep %p cm_id %p tid %u\n", ep,
1309 ep->com.cm_id, ep->hwtid);
1310 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1311 deref_cm_id(&ep->com);
1312 set_bit(ABORT_UPCALL, &ep->com.history);
1313 }
1314}
1315
1316static void connect_reply_upcall(struct c4iw_ep *ep, int status)
1317{
1318 struct iw_cm_event event;
1319
1320 pr_debug("ep %p tid %u status %d\n",
1321 ep, ep->hwtid, status);
1322 memset(&event, 0, sizeof(event));
1323 event.event = IW_CM_EVENT_CONNECT_REPLY;
1324 event.status = status;
1325 memcpy(&event.local_addr, &ep->com.local_addr,
1326 sizeof(ep->com.local_addr));
1327 memcpy(&event.remote_addr, &ep->com.remote_addr,
1328 sizeof(ep->com.remote_addr));
1329
1330 if ((status == 0) || (status == -ECONNREFUSED)) {
1331 if (!ep->tried_with_mpa_v1) {
1332 /* this means MPA_v2 is used */
1333 event.ord = ep->ird;
1334 event.ird = ep->ord;
1335 event.private_data_len = ep->plen -
1336 sizeof(struct mpa_v2_conn_params);
1337 event.private_data = ep->mpa_pkt +
1338 sizeof(struct mpa_message) +
1339 sizeof(struct mpa_v2_conn_params);
1340 } else {
1341 /* this means MPA_v1 is used */
1342 event.ord = cur_max_read_depth(ep->com.dev);
1343 event.ird = cur_max_read_depth(ep->com.dev);
1344 event.private_data_len = ep->plen;
1345 event.private_data = ep->mpa_pkt +
1346 sizeof(struct mpa_message);
1347 }
1348 }
1349
1350 pr_debug("ep %p tid %u status %d\n", ep,
1351 ep->hwtid, status);
1352 set_bit(CONN_RPL_UPCALL, &ep->com.history);
1353 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1354
1355 if (status < 0)
1356 deref_cm_id(&ep->com);
1357}
1358
1359static int connect_request_upcall(struct c4iw_ep *ep)
1360{
1361 struct iw_cm_event event;
1362 int ret;
1363
1364 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
1365 memset(&event, 0, sizeof(event));
1366 event.event = IW_CM_EVENT_CONNECT_REQUEST;
1367 memcpy(&event.local_addr, &ep->com.local_addr,
1368 sizeof(ep->com.local_addr));
1369 memcpy(&event.remote_addr, &ep->com.remote_addr,
1370 sizeof(ep->com.remote_addr));
1371 event.provider_data = ep;
1372 if (!ep->tried_with_mpa_v1) {
1373 /* this means MPA_v2 is used */
1374 event.ord = ep->ord;
1375 event.ird = ep->ird;
1376 event.private_data_len = ep->plen -
1377 sizeof(struct mpa_v2_conn_params);
1378 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message) +
1379 sizeof(struct mpa_v2_conn_params);
1380 } else {
1381 /* this means MPA_v1 is used. Send max supported */
1382 event.ord = cur_max_read_depth(ep->com.dev);
1383 event.ird = cur_max_read_depth(ep->com.dev);
1384 event.private_data_len = ep->plen;
1385 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
1386 }
1387 c4iw_get_ep(&ep->com);
1388 ret = ep->parent_ep->com.cm_id->event_handler(ep->parent_ep->com.cm_id,
1389 &event);
1390 if (ret)
1391 c4iw_put_ep(&ep->com);
1392 set_bit(CONNREQ_UPCALL, &ep->com.history);
1393 c4iw_put_ep(&ep->parent_ep->com);
1394 return ret;
1395}
1396
1397static void established_upcall(struct c4iw_ep *ep)
1398{
1399 struct iw_cm_event event;
1400
1401 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
1402 memset(&event, 0, sizeof(event));
1403 event.event = IW_CM_EVENT_ESTABLISHED;
1404 event.ird = ep->ord;
1405 event.ord = ep->ird;
1406 if (ep->com.cm_id) {
1407 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
1408 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1409 set_bit(ESTAB_UPCALL, &ep->com.history);
1410 }
1411}
1412
1413static int update_rx_credits(struct c4iw_ep *ep, u32 credits)
1414{
1415 struct sk_buff *skb;
1416 u32 wrlen = roundup(sizeof(struct cpl_rx_data_ack), 16);
1417 u32 credit_dack;
1418
1419 pr_debug("ep %p tid %u credits %u\n",
1420 ep, ep->hwtid, credits);
1421 skb = get_skb(NULL, wrlen, GFP_KERNEL);
1422 if (!skb) {
1423 pr_err("update_rx_credits - cannot alloc skb!\n");
1424 return 0;
1425 }
1426
1427 /*
1428 * If we couldn't specify the entire rcv window at connection setup
1429 * due to the limit in the number of bits in the RCV_BUFSIZ field,
1430 * then add the overage in to the credits returned.
1431 */
1432 if (ep->rcv_win > RCV_BUFSIZ_M * 1024)
1433 credits += ep->rcv_win - RCV_BUFSIZ_M * 1024;
1434
1435 credit_dack = credits | RX_FORCE_ACK_F | RX_DACK_CHANGE_F |
1436 RX_DACK_MODE_V(dack_mode);
1437
1438 cxgb_mk_rx_data_ack(skb, wrlen, ep->hwtid, ep->ctrlq_idx,
1439 credit_dack);
1440
1441 c4iw_ofld_send(&ep->com.dev->rdev, skb);
1442 return credits;
1443}
1444
1445#define RELAXED_IRD_NEGOTIATION 1
1446
1447/*
1448 * process_mpa_reply - process streaming mode MPA reply
1449 *
1450 * Returns:
1451 *
1452 * 0 upon success indicating a connect request was delivered to the ULP
1453 * or the mpa request is incomplete but valid so far.
1454 *
1455 * 1 if a failure requires the caller to close the connection.
1456 *
1457 * 2 if a failure requires the caller to abort the connection.
1458 */
1459static int process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
1460{
1461 struct mpa_message *mpa;
1462 struct mpa_v2_conn_params *mpa_v2_params;
1463 u16 plen;
1464 u16 resp_ird, resp_ord;
1465 u8 rtr_mismatch = 0, insuff_ird = 0;
1466 struct c4iw_qp_attributes attrs;
1467 enum c4iw_qp_attr_mask mask;
1468 int err;
1469 int disconnect = 0;
1470
1471 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
1472
1473 /*
1474 * If we get more than the supported amount of private data
1475 * then we must fail this connection.
1476 */
1477 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
1478 err = -EINVAL;
1479 goto err_stop_timer;
1480 }
1481
1482 /*
1483 * copy the new data into our accumulation buffer.
1484 */
1485 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
1486 skb->len);
1487 ep->mpa_pkt_len += skb->len;
1488
1489 /*
1490 * if we don't even have the mpa message, then bail.
1491 */
1492 if (ep->mpa_pkt_len < sizeof(*mpa))
1493 return 0;
1494 mpa = (struct mpa_message *) ep->mpa_pkt;
1495
1496 /* Validate MPA header. */
1497 if (mpa->revision > mpa_rev) {
1498 pr_err("%s MPA version mismatch. Local = %d, Received = %d\n",
1499 __func__, mpa_rev, mpa->revision);
1500 err = -EPROTO;
1501 goto err_stop_timer;
1502 }
1503 if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
1504 err = -EPROTO;
1505 goto err_stop_timer;
1506 }
1507
1508 plen = ntohs(mpa->private_data_size);
1509
1510 /*
1511 * Fail if there's too much private data.
1512 */
1513 if (plen > MPA_MAX_PRIVATE_DATA) {
1514 err = -EPROTO;
1515 goto err_stop_timer;
1516 }
1517
1518 /*
1519 * If plen does not account for pkt size
1520 */
1521 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1522 err = -EPROTO;
1523 goto err_stop_timer;
1524 }
1525
1526 ep->plen = (u8) plen;
1527
1528 /*
1529 * If we don't have all the pdata yet, then bail.
1530 * We'll continue process when more data arrives.
1531 */
1532 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1533 return 0;
1534
1535 if (mpa->flags & MPA_REJECT) {
1536 err = -ECONNREFUSED;
1537 goto err_stop_timer;
1538 }
1539
1540 /*
1541 * Stop mpa timer. If it expired, then
1542 * we ignore the MPA reply. process_timeout()
1543 * will abort the connection.
1544 */
1545 if (stop_ep_timer(ep))
1546 return 0;
1547
1548 /*
1549 * If we get here we have accumulated the entire mpa
1550 * start reply message including private data. And
1551 * the MPA header is valid.
1552 */
1553 __state_set(&ep->com, FPDU_MODE);
1554 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1555 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
1556 ep->mpa_attr.version = mpa->revision;
1557 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1558
1559 if (mpa->revision == 2) {
1560 ep->mpa_attr.enhanced_rdma_conn =
1561 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
1562 if (ep->mpa_attr.enhanced_rdma_conn) {
1563 mpa_v2_params = (struct mpa_v2_conn_params *)
1564 (ep->mpa_pkt + sizeof(*mpa));
1565 resp_ird = ntohs(mpa_v2_params->ird) &
1566 MPA_V2_IRD_ORD_MASK;
1567 resp_ord = ntohs(mpa_v2_params->ord) &
1568 MPA_V2_IRD_ORD_MASK;
1569 pr_debug("responder ird %u ord %u ep ird %u ord %u\n",
1570 resp_ird, resp_ord, ep->ird, ep->ord);
1571
1572 /*
1573 * This is a double-check. Ideally, below checks are
1574 * not required since ird/ord stuff has been taken
1575 * care of in c4iw_accept_cr
1576 */
1577 if (ep->ird < resp_ord) {
1578 if (RELAXED_IRD_NEGOTIATION && resp_ord <=
1579 ep->com.dev->rdev.lldi.max_ordird_qp)
1580 ep->ird = resp_ord;
1581 else
1582 insuff_ird = 1;
1583 } else if (ep->ird > resp_ord) {
1584 ep->ird = resp_ord;
1585 }
1586 if (ep->ord > resp_ird) {
1587 if (RELAXED_IRD_NEGOTIATION)
1588 ep->ord = resp_ird;
1589 else
1590 insuff_ird = 1;
1591 }
1592 if (insuff_ird) {
1593 err = -ENOMEM;
1594 ep->ird = resp_ord;
1595 ep->ord = resp_ird;
1596 }
1597
1598 if (ntohs(mpa_v2_params->ird) &
1599 MPA_V2_PEER2PEER_MODEL) {
1600 if (ntohs(mpa_v2_params->ord) &
1601 MPA_V2_RDMA_WRITE_RTR)
1602 ep->mpa_attr.p2p_type =
1603 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
1604 else if (ntohs(mpa_v2_params->ord) &
1605 MPA_V2_RDMA_READ_RTR)
1606 ep->mpa_attr.p2p_type =
1607 FW_RI_INIT_P2PTYPE_READ_REQ;
1608 }
1609 }
1610 } else if (mpa->revision == 1)
1611 if (peer2peer)
1612 ep->mpa_attr.p2p_type = p2p_type;
1613
1614 pr_debug("crc_enabled=%d, recv_marker_enabled=%d, xmit_marker_enabled=%d, version=%d p2p_type=%d local-p2p_type = %d\n",
1615 ep->mpa_attr.crc_enabled,
1616 ep->mpa_attr.recv_marker_enabled,
1617 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1618 ep->mpa_attr.p2p_type, p2p_type);
1619
1620 /*
1621 * If responder's RTR does not match with that of initiator, assign
1622 * FW_RI_INIT_P2PTYPE_DISABLED in mpa attributes so that RTR is not
1623 * generated when moving QP to RTS state.
1624 * A TERM message will be sent after QP has moved to RTS state
1625 */
1626 if ((ep->mpa_attr.version == 2) && peer2peer &&
1627 (ep->mpa_attr.p2p_type != p2p_type)) {
1628 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1629 rtr_mismatch = 1;
1630 }
1631
1632 attrs.mpa_attr = ep->mpa_attr;
1633 attrs.max_ird = ep->ird;
1634 attrs.max_ord = ep->ord;
1635 attrs.llp_stream_handle = ep;
1636 attrs.next_state = C4IW_QP_STATE_RTS;
1637
1638 mask = C4IW_QP_ATTR_NEXT_STATE |
1639 C4IW_QP_ATTR_LLP_STREAM_HANDLE | C4IW_QP_ATTR_MPA_ATTR |
1640 C4IW_QP_ATTR_MAX_IRD | C4IW_QP_ATTR_MAX_ORD;
1641
1642 /* bind QP and TID with INIT_WR */
1643 err = c4iw_modify_qp(ep->com.qp->rhp,
1644 ep->com.qp, mask, &attrs, 1);
1645 if (err)
1646 goto err;
1647
1648 /*
1649 * If responder's RTR requirement did not match with what initiator
1650 * supports, generate TERM message
1651 */
1652 if (rtr_mismatch) {
1653 pr_err("%s: RTR mismatch, sending TERM\n", __func__);
1654 attrs.layer_etype = LAYER_MPA | DDP_LLP;
1655 attrs.ecode = MPA_NOMATCH_RTR;
1656 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1657 attrs.send_term = 1;
1658 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1659 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1660 err = -ENOMEM;
1661 disconnect = 1;
1662 goto out;
1663 }
1664
1665 /*
1666 * Generate TERM if initiator IRD is not sufficient for responder
1667 * provided ORD. Currently, we do the same behaviour even when
1668 * responder provided IRD is also not sufficient as regards to
1669 * initiator ORD.
1670 */
1671 if (insuff_ird) {
1672 pr_err("%s: Insufficient IRD, sending TERM\n", __func__);
1673 attrs.layer_etype = LAYER_MPA | DDP_LLP;
1674 attrs.ecode = MPA_INSUFF_IRD;
1675 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1676 attrs.send_term = 1;
1677 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1678 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1679 err = -ENOMEM;
1680 disconnect = 1;
1681 goto out;
1682 }
1683 goto out;
1684err_stop_timer:
1685 stop_ep_timer(ep);
1686err:
1687 disconnect = 2;
1688out:
1689 connect_reply_upcall(ep, err);
1690 return disconnect;
1691}
1692
1693/*
1694 * process_mpa_request - process streaming mode MPA request
1695 *
1696 * Returns:
1697 *
1698 * 0 upon success indicating a connect request was delivered to the ULP
1699 * or the mpa request is incomplete but valid so far.
1700 *
1701 * 1 if a failure requires the caller to close the connection.
1702 *
1703 * 2 if a failure requires the caller to abort the connection.
1704 */
1705static int process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb)
1706{
1707 struct mpa_message *mpa;
1708 struct mpa_v2_conn_params *mpa_v2_params;
1709 u16 plen;
1710
1711 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
1712
1713 /*
1714 * If we get more than the supported amount of private data
1715 * then we must fail this connection.
1716 */
1717 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt))
1718 goto err_stop_timer;
1719
1720 pr_debug("enter (%s line %u)\n", __FILE__, __LINE__);
1721
1722 /*
1723 * Copy the new data into our accumulation buffer.
1724 */
1725 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
1726 skb->len);
1727 ep->mpa_pkt_len += skb->len;
1728
1729 /*
1730 * If we don't even have the mpa message, then bail.
1731 * We'll continue process when more data arrives.
1732 */
1733 if (ep->mpa_pkt_len < sizeof(*mpa))
1734 return 0;
1735
1736 pr_debug("enter (%s line %u)\n", __FILE__, __LINE__);
1737 mpa = (struct mpa_message *) ep->mpa_pkt;
1738
1739 /*
1740 * Validate MPA Header.
1741 */
1742 if (mpa->revision > mpa_rev) {
1743 pr_err("%s MPA version mismatch. Local = %d, Received = %d\n",
1744 __func__, mpa_rev, mpa->revision);
1745 goto err_stop_timer;
1746 }
1747
1748 if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key)))
1749 goto err_stop_timer;
1750
1751 plen = ntohs(mpa->private_data_size);
1752
1753 /*
1754 * Fail if there's too much private data.
1755 */
1756 if (plen > MPA_MAX_PRIVATE_DATA)
1757 goto err_stop_timer;
1758
1759 /*
1760 * If plen does not account for pkt size
1761 */
1762 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen))
1763 goto err_stop_timer;
1764 ep->plen = (u8) plen;
1765
1766 /*
1767 * If we don't have all the pdata yet, then bail.
1768 */
1769 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1770 return 0;
1771
1772 /*
1773 * If we get here we have accumulated the entire mpa
1774 * start reply message including private data.
1775 */
1776 ep->mpa_attr.initiator = 0;
1777 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1778 ep->mpa_attr.recv_marker_enabled = markers_enabled;
1779 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
1780 ep->mpa_attr.version = mpa->revision;
1781 if (mpa->revision == 1)
1782 ep->tried_with_mpa_v1 = 1;
1783 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1784
1785 if (mpa->revision == 2) {
1786 ep->mpa_attr.enhanced_rdma_conn =
1787 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
1788 if (ep->mpa_attr.enhanced_rdma_conn) {
1789 mpa_v2_params = (struct mpa_v2_conn_params *)
1790 (ep->mpa_pkt + sizeof(*mpa));
1791 ep->ird = ntohs(mpa_v2_params->ird) &
1792 MPA_V2_IRD_ORD_MASK;
1793 ep->ird = min_t(u32, ep->ird,
1794 cur_max_read_depth(ep->com.dev));
1795 ep->ord = ntohs(mpa_v2_params->ord) &
1796 MPA_V2_IRD_ORD_MASK;
1797 ep->ord = min_t(u32, ep->ord,
1798 cur_max_read_depth(ep->com.dev));
1799 pr_debug("initiator ird %u ord %u\n",
1800 ep->ird, ep->ord);
1801 if (ntohs(mpa_v2_params->ird) & MPA_V2_PEER2PEER_MODEL)
1802 if (peer2peer) {
1803 if (ntohs(mpa_v2_params->ord) &
1804 MPA_V2_RDMA_WRITE_RTR)
1805 ep->mpa_attr.p2p_type =
1806 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
1807 else if (ntohs(mpa_v2_params->ord) &
1808 MPA_V2_RDMA_READ_RTR)
1809 ep->mpa_attr.p2p_type =
1810 FW_RI_INIT_P2PTYPE_READ_REQ;
1811 }
1812 }
1813 } else if (mpa->revision == 1)
1814 if (peer2peer)
1815 ep->mpa_attr.p2p_type = p2p_type;
1816
1817 pr_debug("crc_enabled=%d, recv_marker_enabled=%d, xmit_marker_enabled=%d, version=%d p2p_type=%d\n",
1818 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
1819 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1820 ep->mpa_attr.p2p_type);
1821
1822 __state_set(&ep->com, MPA_REQ_RCVD);
1823
1824 /* drive upcall */
1825 mutex_lock_nested(&ep->parent_ep->com.mutex, SINGLE_DEPTH_NESTING);
1826 if (ep->parent_ep->com.state != DEAD) {
1827 if (connect_request_upcall(ep))
1828 goto err_unlock_parent;
1829 } else {
1830 goto err_unlock_parent;
1831 }
1832 mutex_unlock(&ep->parent_ep->com.mutex);
1833 return 0;
1834
1835err_unlock_parent:
1836 mutex_unlock(&ep->parent_ep->com.mutex);
1837 goto err_out;
1838err_stop_timer:
1839 (void)stop_ep_timer(ep);
1840err_out:
1841 return 2;
1842}
1843
1844static int rx_data(struct c4iw_dev *dev, struct sk_buff *skb)
1845{
1846 struct c4iw_ep *ep;
1847 struct cpl_rx_data *hdr = cplhdr(skb);
1848 unsigned int dlen = ntohs(hdr->len);
1849 unsigned int tid = GET_TID(hdr);
1850 __u8 status = hdr->status;
1851 int disconnect = 0;
1852
1853 ep = get_ep_from_tid(dev, tid);
1854 if (!ep)
1855 return 0;
1856 pr_debug("ep %p tid %u dlen %u\n", ep, ep->hwtid, dlen);
1857 skb_pull(skb, sizeof(*hdr));
1858 skb_trim(skb, dlen);
1859 mutex_lock(&ep->com.mutex);
1860
1861 switch (ep->com.state) {
1862 case MPA_REQ_SENT:
1863 update_rx_credits(ep, dlen);
1864 ep->rcv_seq += dlen;
1865 disconnect = process_mpa_reply(ep, skb);
1866 break;
1867 case MPA_REQ_WAIT:
1868 update_rx_credits(ep, dlen);
1869 ep->rcv_seq += dlen;
1870 disconnect = process_mpa_request(ep, skb);
1871 break;
1872 case FPDU_MODE: {
1873 struct c4iw_qp_attributes attrs;
1874
1875 update_rx_credits(ep, dlen);
1876 if (status)
1877 pr_err("%s Unexpected streaming data." \
1878 " qpid %u ep %p state %d tid %u status %d\n",
1879 __func__, ep->com.qp->wq.sq.qid, ep,
1880 ep->com.state, ep->hwtid, status);
1881 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1882 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1883 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1884 disconnect = 1;
1885 break;
1886 }
1887 default:
1888 break;
1889 }
1890 mutex_unlock(&ep->com.mutex);
1891 if (disconnect)
1892 c4iw_ep_disconnect(ep, disconnect == 2, GFP_KERNEL);
1893 c4iw_put_ep(&ep->com);
1894 return 0;
1895}
1896
1897static void complete_cached_srq_buffers(struct c4iw_ep *ep, u32 srqidx)
1898{
1899 enum chip_type adapter_type;
1900
1901 adapter_type = ep->com.dev->rdev.lldi.adapter_type;
1902
1903 /*
1904 * If this TCB had a srq buffer cached, then we must complete
1905 * it. For user mode, that means saving the srqidx in the
1906 * user/kernel status page for this qp. For kernel mode, just
1907 * synthesize the CQE now.
1908 */
1909 if (CHELSIO_CHIP_VERSION(adapter_type) > CHELSIO_T5 && srqidx) {
1910 if (ep->com.qp->ibqp.uobject)
1911 t4_set_wq_in_error(&ep->com.qp->wq, srqidx);
1912 else
1913 c4iw_flush_srqidx(ep->com.qp, srqidx);
1914 }
1915}
1916
1917static int abort_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1918{
1919 u32 srqidx;
1920 struct c4iw_ep *ep;
1921 struct cpl_abort_rpl_rss6 *rpl = cplhdr(skb);
1922 int release = 0;
1923 unsigned int tid = GET_TID(rpl);
1924
1925 ep = get_ep_from_tid(dev, tid);
1926 if (!ep) {
1927 pr_warn("Abort rpl to freed endpoint\n");
1928 return 0;
1929 }
1930
1931 if (ep->com.qp && ep->com.qp->srq) {
1932 srqidx = ABORT_RSS_SRQIDX_G(be32_to_cpu(rpl->srqidx_status));
1933 complete_cached_srq_buffers(ep, srqidx ? srqidx : ep->srqe_idx);
1934 }
1935
1936 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
1937 mutex_lock(&ep->com.mutex);
1938 switch (ep->com.state) {
1939 case ABORTING:
1940 c4iw_wake_up_noref(ep->com.wr_waitp, -ECONNRESET);
1941 __state_set(&ep->com, DEAD);
1942 release = 1;
1943 break;
1944 default:
1945 pr_err("%s ep %p state %d\n", __func__, ep, ep->com.state);
1946 break;
1947 }
1948 mutex_unlock(&ep->com.mutex);
1949
1950 if (release) {
1951 close_complete_upcall(ep, -ECONNRESET);
1952 release_ep_resources(ep);
1953 }
1954 c4iw_put_ep(&ep->com);
1955 return 0;
1956}
1957
1958static int send_fw_act_open_req(struct c4iw_ep *ep, unsigned int atid)
1959{
1960 struct sk_buff *skb;
1961 struct fw_ofld_connection_wr *req;
1962 unsigned int mtu_idx;
1963 u32 wscale;
1964 struct sockaddr_in *sin;
1965 int win;
1966
1967 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
1968 if (!skb)
1969 return -ENOMEM;
1970
1971 req = __skb_put_zero(skb, sizeof(*req));
1972 req->op_compl = htonl(WR_OP_V(FW_OFLD_CONNECTION_WR));
1973 req->len16_pkd = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*req), 16)));
1974 req->le.filter = cpu_to_be32(cxgb4_select_ntuple(
1975 ep->com.dev->rdev.lldi.ports[0],
1976 ep->l2t));
1977 sin = (struct sockaddr_in *)&ep->com.local_addr;
1978 req->le.lport = sin->sin_port;
1979 req->le.u.ipv4.lip = sin->sin_addr.s_addr;
1980 sin = (struct sockaddr_in *)&ep->com.remote_addr;
1981 req->le.pport = sin->sin_port;
1982 req->le.u.ipv4.pip = sin->sin_addr.s_addr;
1983 req->tcb.t_state_to_astid =
1984 htonl(FW_OFLD_CONNECTION_WR_T_STATE_V(TCP_SYN_SENT) |
1985 FW_OFLD_CONNECTION_WR_ASTID_V(atid));
1986 req->tcb.cplrxdataack_cplpassacceptrpl =
1987 htons(FW_OFLD_CONNECTION_WR_CPLRXDATAACK_F);
1988 req->tcb.tx_max = (__force __be32) jiffies;
1989 req->tcb.rcv_adv = htons(1);
1990 cxgb_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
1991 enable_tcp_timestamps,
1992 (ep->com.remote_addr.ss_family == AF_INET) ? 0 : 1);
1993 wscale = cxgb_compute_wscale(rcv_win);
1994
1995 /*
1996 * Specify the largest window that will fit in opt0. The
1997 * remainder will be specified in the rx_data_ack.
1998 */
1999 win = ep->rcv_win >> 10;
2000 if (win > RCV_BUFSIZ_M)
2001 win = RCV_BUFSIZ_M;
2002
2003 req->tcb.opt0 = (__force __be64) (TCAM_BYPASS_F |
2004 (nocong ? NO_CONG_F : 0) |
2005 KEEP_ALIVE_F |
2006 DELACK_F |
2007 WND_SCALE_V(wscale) |
2008 MSS_IDX_V(mtu_idx) |
2009 L2T_IDX_V(ep->l2t->idx) |
2010 TX_CHAN_V(ep->tx_chan) |
2011 SMAC_SEL_V(ep->smac_idx) |
2012 DSCP_V(ep->tos >> 2) |
2013 ULP_MODE_V(ULP_MODE_TCPDDP) |
2014 RCV_BUFSIZ_V(win));
2015 req->tcb.opt2 = (__force __be32) (PACE_V(1) |
2016 TX_QUEUE_V(ep->com.dev->rdev.lldi.tx_modq[ep->tx_chan]) |
2017 RX_CHANNEL_V(0) |
2018 CCTRL_ECN_V(enable_ecn) |
2019 RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid));
2020 if (enable_tcp_timestamps)
2021 req->tcb.opt2 |= (__force __be32)TSTAMPS_EN_F;
2022 if (enable_tcp_sack)
2023 req->tcb.opt2 |= (__force __be32)SACK_EN_F;
2024 if (wscale && enable_tcp_window_scaling)
2025 req->tcb.opt2 |= (__force __be32)WND_SCALE_EN_F;
2026 req->tcb.opt0 = cpu_to_be64((__force u64)req->tcb.opt0);
2027 req->tcb.opt2 = cpu_to_be32((__force u32)req->tcb.opt2);
2028 set_wr_txq(skb, CPL_PRIORITY_CONTROL, ep->ctrlq_idx);
2029 set_bit(ACT_OFLD_CONN, &ep->com.history);
2030 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
2031}
2032
2033/*
2034 * Some of the error codes above implicitly indicate that there is no TID
2035 * allocated with the result of an ACT_OPEN. We use this predicate to make
2036 * that explicit.
2037 */
2038static inline int act_open_has_tid(int status)
2039{
2040 return (status != CPL_ERR_TCAM_PARITY &&
2041 status != CPL_ERR_TCAM_MISS &&
2042 status != CPL_ERR_TCAM_FULL &&
2043 status != CPL_ERR_CONN_EXIST_SYNRECV &&
2044 status != CPL_ERR_CONN_EXIST);
2045}
2046
2047static char *neg_adv_str(unsigned int status)
2048{
2049 switch (status) {
2050 case CPL_ERR_RTX_NEG_ADVICE:
2051 return "Retransmit timeout";
2052 case CPL_ERR_PERSIST_NEG_ADVICE:
2053 return "Persist timeout";
2054 case CPL_ERR_KEEPALV_NEG_ADVICE:
2055 return "Keepalive timeout";
2056 default:
2057 return "Unknown";
2058 }
2059}
2060
2061static void set_tcp_window(struct c4iw_ep *ep, struct port_info *pi)
2062{
2063 ep->snd_win = snd_win;
2064 ep->rcv_win = rcv_win;
2065 pr_debug("snd_win %d rcv_win %d\n",
2066 ep->snd_win, ep->rcv_win);
2067}
2068
2069#define ACT_OPEN_RETRY_COUNT 2
2070
2071static int import_ep(struct c4iw_ep *ep, int iptype, __u8 *peer_ip,
2072 struct dst_entry *dst, struct c4iw_dev *cdev,
2073 bool clear_mpa_v1, enum chip_type adapter_type, u8 tos)
2074{
2075 struct neighbour *n;
2076 int err, step;
2077 struct net_device *pdev;
2078
2079 n = dst_neigh_lookup(dst, peer_ip);
2080 if (!n)
2081 return -ENODEV;
2082
2083 rcu_read_lock();
2084 err = -ENOMEM;
2085 if (n->dev->flags & IFF_LOOPBACK) {
2086 if (iptype == 4)
2087 pdev = ip_dev_find(&init_net, *(__be32 *)peer_ip);
2088 else if (IS_ENABLED(CONFIG_IPV6))
2089 for_each_netdev(&init_net, pdev) {
2090 if (ipv6_chk_addr(&init_net,
2091 (struct in6_addr *)peer_ip,
2092 pdev, 1))
2093 break;
2094 }
2095 else
2096 pdev = NULL;
2097
2098 if (!pdev) {
2099 err = -ENODEV;
2100 goto out;
2101 }
2102 ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
2103 n, pdev, rt_tos2priority(tos));
2104 if (!ep->l2t) {
2105 dev_put(pdev);
2106 goto out;
2107 }
2108 ep->mtu = pdev->mtu;
2109 ep->tx_chan = cxgb4_port_chan(pdev);
2110 ep->smac_idx = ((struct port_info *)netdev_priv(pdev))->smt_idx;
2111 step = cdev->rdev.lldi.ntxq /
2112 cdev->rdev.lldi.nchan;
2113 ep->txq_idx = cxgb4_port_idx(pdev) * step;
2114 step = cdev->rdev.lldi.nrxq /
2115 cdev->rdev.lldi.nchan;
2116 ep->ctrlq_idx = cxgb4_port_idx(pdev);
2117 ep->rss_qid = cdev->rdev.lldi.rxq_ids[
2118 cxgb4_port_idx(pdev) * step];
2119 set_tcp_window(ep, (struct port_info *)netdev_priv(pdev));
2120 dev_put(pdev);
2121 } else {
2122 pdev = get_real_dev(n->dev);
2123 ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
2124 n, pdev, rt_tos2priority(tos));
2125 if (!ep->l2t)
2126 goto out;
2127 ep->mtu = dst_mtu(dst);
2128 ep->tx_chan = cxgb4_port_chan(pdev);
2129 ep->smac_idx = ((struct port_info *)netdev_priv(pdev))->smt_idx;
2130 step = cdev->rdev.lldi.ntxq /
2131 cdev->rdev.lldi.nchan;
2132 ep->txq_idx = cxgb4_port_idx(pdev) * step;
2133 ep->ctrlq_idx = cxgb4_port_idx(pdev);
2134 step = cdev->rdev.lldi.nrxq /
2135 cdev->rdev.lldi.nchan;
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
2140 if (clear_mpa_v1) {
2141 ep->retry_with_mpa_v1 = 0;
2142 ep->tried_with_mpa_v1 = 0;
2143 }
2144 }
2145 err = 0;
2146out:
2147 rcu_read_unlock();
2148
2149 neigh_release(n);
2150
2151 return err;
2152}
2153
2154static int c4iw_reconnect(struct c4iw_ep *ep)
2155{
2156 int err = 0;
2157 int size = 0;
2158 struct sockaddr_in *laddr = (struct sockaddr_in *)
2159 &ep->com.cm_id->m_local_addr;
2160 struct sockaddr_in *raddr = (struct sockaddr_in *)
2161 &ep->com.cm_id->m_remote_addr;
2162 struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)
2163 &ep->com.cm_id->m_local_addr;
2164 struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)
2165 &ep->com.cm_id->m_remote_addr;
2166 int iptype;
2167 __u8 *ra;
2168
2169 pr_debug("qp %p cm_id %p\n", ep->com.qp, ep->com.cm_id);
2170 c4iw_init_wr_wait(ep->com.wr_waitp);
2171
2172 /* When MPA revision is different on nodes, the node with MPA_rev=2
2173 * tries to reconnect with MPA_rev 1 for the same EP through
2174 * c4iw_reconnect(), where the same EP is assigned with new tid for
2175 * further connection establishment. As we are using the same EP pointer
2176 * for reconnect, few skbs are used during the previous c4iw_connect(),
2177 * which leaves the EP with inadequate skbs for further
2178 * c4iw_reconnect(), Further causing a crash due to an empty
2179 * skb_list() during peer_abort(). Allocate skbs which is already used.
2180 */
2181 size = (CN_MAX_CON_BUF - skb_queue_len(&ep->com.ep_skb_list));
2182 if (alloc_ep_skb_list(&ep->com.ep_skb_list, size)) {
2183 err = -ENOMEM;
2184 goto fail1;
2185 }
2186
2187 /*
2188 * Allocate an active TID to initiate a TCP connection.
2189 */
2190 ep->atid = cxgb4_alloc_atid(ep->com.dev->rdev.lldi.tids, ep);
2191 if (ep->atid == -1) {
2192 pr_err("%s - cannot alloc atid\n", __func__);
2193 err = -ENOMEM;
2194 goto fail2;
2195 }
2196 err = xa_insert_irq(&ep->com.dev->atids, ep->atid, ep, GFP_KERNEL);
2197 if (err)
2198 goto fail2a;
2199
2200 /* find a route */
2201 if (ep->com.cm_id->m_local_addr.ss_family == AF_INET) {
2202 ep->dst = cxgb_find_route(&ep->com.dev->rdev.lldi, get_real_dev,
2203 laddr->sin_addr.s_addr,
2204 raddr->sin_addr.s_addr,
2205 laddr->sin_port,
2206 raddr->sin_port, ep->com.cm_id->tos);
2207 iptype = 4;
2208 ra = (__u8 *)&raddr->sin_addr;
2209 } else {
2210 ep->dst = cxgb_find_route6(&ep->com.dev->rdev.lldi,
2211 get_real_dev,
2212 laddr6->sin6_addr.s6_addr,
2213 raddr6->sin6_addr.s6_addr,
2214 laddr6->sin6_port,
2215 raddr6->sin6_port,
2216 ep->com.cm_id->tos,
2217 raddr6->sin6_scope_id);
2218 iptype = 6;
2219 ra = (__u8 *)&raddr6->sin6_addr;
2220 }
2221 if (!ep->dst) {
2222 pr_err("%s - cannot find route\n", __func__);
2223 err = -EHOSTUNREACH;
2224 goto fail3;
2225 }
2226 err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, false,
2227 ep->com.dev->rdev.lldi.adapter_type,
2228 ep->com.cm_id->tos);
2229 if (err) {
2230 pr_err("%s - cannot alloc l2e\n", __func__);
2231 goto fail4;
2232 }
2233
2234 pr_debug("txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
2235 ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
2236 ep->l2t->idx);
2237
2238 state_set(&ep->com, CONNECTING);
2239 ep->tos = ep->com.cm_id->tos;
2240
2241 /* send connect request to rnic */
2242 err = send_connect(ep);
2243 if (!err)
2244 goto out;
2245
2246 cxgb4_l2t_release(ep->l2t);
2247fail4:
2248 dst_release(ep->dst);
2249fail3:
2250 xa_erase_irq(&ep->com.dev->atids, ep->atid);
2251fail2a:
2252 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
2253fail2:
2254 /*
2255 * remember to send notification to upper layer.
2256 * We are in here so the upper layer is not aware that this is
2257 * re-connect attempt and so, upper layer is still waiting for
2258 * response of 1st connect request.
2259 */
2260 connect_reply_upcall(ep, -ECONNRESET);
2261fail1:
2262 c4iw_put_ep(&ep->com);
2263out:
2264 return err;
2265}
2266
2267static int act_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2268{
2269 struct c4iw_ep *ep;
2270 struct cpl_act_open_rpl *rpl = cplhdr(skb);
2271 unsigned int atid = TID_TID_G(AOPEN_ATID_G(
2272 ntohl(rpl->atid_status)));
2273 struct tid_info *t = dev->rdev.lldi.tids;
2274 int status = AOPEN_STATUS_G(ntohl(rpl->atid_status));
2275 struct sockaddr_in *la;
2276 struct sockaddr_in *ra;
2277 struct sockaddr_in6 *la6;
2278 struct sockaddr_in6 *ra6;
2279 int ret = 0;
2280
2281 ep = lookup_atid(t, atid);
2282 la = (struct sockaddr_in *)&ep->com.local_addr;
2283 ra = (struct sockaddr_in *)&ep->com.remote_addr;
2284 la6 = (struct sockaddr_in6 *)&ep->com.local_addr;
2285 ra6 = (struct sockaddr_in6 *)&ep->com.remote_addr;
2286
2287 pr_debug("ep %p atid %u status %u errno %d\n", ep, atid,
2288 status, status2errno(status));
2289
2290 if (cxgb_is_neg_adv(status)) {
2291 pr_debug("Connection problems for atid %u status %u (%s)\n",
2292 atid, status, neg_adv_str(status));
2293 ep->stats.connect_neg_adv++;
2294 mutex_lock(&dev->rdev.stats.lock);
2295 dev->rdev.stats.neg_adv++;
2296 mutex_unlock(&dev->rdev.stats.lock);
2297 return 0;
2298 }
2299
2300 set_bit(ACT_OPEN_RPL, &ep->com.history);
2301
2302 /*
2303 * Log interesting failures.
2304 */
2305 switch (status) {
2306 case CPL_ERR_CONN_RESET:
2307 case CPL_ERR_CONN_TIMEDOUT:
2308 break;
2309 case CPL_ERR_TCAM_FULL:
2310 mutex_lock(&dev->rdev.stats.lock);
2311 dev->rdev.stats.tcam_full++;
2312 mutex_unlock(&dev->rdev.stats.lock);
2313 if (ep->com.local_addr.ss_family == AF_INET &&
2314 dev->rdev.lldi.enable_fw_ofld_conn) {
2315 ret = send_fw_act_open_req(ep, TID_TID_G(AOPEN_ATID_G(
2316 ntohl(rpl->atid_status))));
2317 if (ret)
2318 goto fail;
2319 return 0;
2320 }
2321 break;
2322 case CPL_ERR_CONN_EXIST:
2323 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
2324 set_bit(ACT_RETRY_INUSE, &ep->com.history);
2325 if (ep->com.remote_addr.ss_family == AF_INET6) {
2326 struct sockaddr_in6 *sin6 =
2327 (struct sockaddr_in6 *)
2328 &ep->com.local_addr;
2329 cxgb4_clip_release(
2330 ep->com.dev->rdev.lldi.ports[0],
2331 (const u32 *)
2332 &sin6->sin6_addr.s6_addr, 1);
2333 }
2334 xa_erase_irq(&ep->com.dev->atids, atid);
2335 cxgb4_free_atid(t, atid);
2336 dst_release(ep->dst);
2337 cxgb4_l2t_release(ep->l2t);
2338 c4iw_reconnect(ep);
2339 return 0;
2340 }
2341 break;
2342 default:
2343 if (ep->com.local_addr.ss_family == AF_INET) {
2344 pr_info("Active open failure - atid %u status %u errno %d %pI4:%u->%pI4:%u\n",
2345 atid, status, status2errno(status),
2346 &la->sin_addr.s_addr, ntohs(la->sin_port),
2347 &ra->sin_addr.s_addr, ntohs(ra->sin_port));
2348 } else {
2349 pr_info("Active open failure - atid %u status %u errno %d %pI6:%u->%pI6:%u\n",
2350 atid, status, status2errno(status),
2351 la6->sin6_addr.s6_addr, ntohs(la6->sin6_port),
2352 ra6->sin6_addr.s6_addr, ntohs(ra6->sin6_port));
2353 }
2354 break;
2355 }
2356
2357fail:
2358 connect_reply_upcall(ep, status2errno(status));
2359 state_set(&ep->com, DEAD);
2360
2361 if (ep->com.remote_addr.ss_family == AF_INET6) {
2362 struct sockaddr_in6 *sin6 =
2363 (struct sockaddr_in6 *)&ep->com.local_addr;
2364 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
2365 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
2366 }
2367 if (status && act_open_has_tid(status))
2368 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, GET_TID(rpl),
2369 ep->com.local_addr.ss_family);
2370
2371 xa_erase_irq(&ep->com.dev->atids, atid);
2372 cxgb4_free_atid(t, atid);
2373 dst_release(ep->dst);
2374 cxgb4_l2t_release(ep->l2t);
2375 c4iw_put_ep(&ep->com);
2376
2377 return 0;
2378}
2379
2380static int pass_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2381{
2382 struct cpl_pass_open_rpl *rpl = cplhdr(skb);
2383 unsigned int stid = GET_TID(rpl);
2384 struct c4iw_listen_ep *ep = get_ep_from_stid(dev, stid);
2385
2386 if (!ep) {
2387 pr_warn("%s stid %d lookup failure!\n", __func__, stid);
2388 goto out;
2389 }
2390 pr_debug("ep %p status %d error %d\n", ep,
2391 rpl->status, status2errno(rpl->status));
2392 c4iw_wake_up_noref(ep->com.wr_waitp, status2errno(rpl->status));
2393 c4iw_put_ep(&ep->com);
2394out:
2395 return 0;
2396}
2397
2398static int close_listsrv_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2399{
2400 struct cpl_close_listsvr_rpl *rpl = cplhdr(skb);
2401 unsigned int stid = GET_TID(rpl);
2402 struct c4iw_listen_ep *ep = get_ep_from_stid(dev, stid);
2403
2404 if (!ep) {
2405 pr_warn("%s stid %d lookup failure!\n", __func__, stid);
2406 goto out;
2407 }
2408 pr_debug("ep %p\n", ep);
2409 c4iw_wake_up_noref(ep->com.wr_waitp, status2errno(rpl->status));
2410 c4iw_put_ep(&ep->com);
2411out:
2412 return 0;
2413}
2414
2415static int accept_cr(struct c4iw_ep *ep, struct sk_buff *skb,
2416 struct cpl_pass_accept_req *req)
2417{
2418 struct cpl_pass_accept_rpl *rpl;
2419 unsigned int mtu_idx;
2420 u64 opt0;
2421 u32 opt2;
2422 u32 wscale;
2423 struct cpl_t5_pass_accept_rpl *rpl5 = NULL;
2424 int win;
2425 enum chip_type adapter_type = ep->com.dev->rdev.lldi.adapter_type;
2426
2427 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
2428 cxgb_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
2429 enable_tcp_timestamps && req->tcpopt.tstamp,
2430 (ep->com.remote_addr.ss_family == AF_INET) ? 0 : 1);
2431 wscale = cxgb_compute_wscale(rcv_win);
2432
2433 /*
2434 * Specify the largest window that will fit in opt0. The
2435 * remainder will be specified in the rx_data_ack.
2436 */
2437 win = ep->rcv_win >> 10;
2438 if (win > RCV_BUFSIZ_M)
2439 win = RCV_BUFSIZ_M;
2440 opt0 = (nocong ? NO_CONG_F : 0) |
2441 KEEP_ALIVE_F |
2442 DELACK_F |
2443 WND_SCALE_V(wscale) |
2444 MSS_IDX_V(mtu_idx) |
2445 L2T_IDX_V(ep->l2t->idx) |
2446 TX_CHAN_V(ep->tx_chan) |
2447 SMAC_SEL_V(ep->smac_idx) |
2448 DSCP_V(ep->tos >> 2) |
2449 ULP_MODE_V(ULP_MODE_TCPDDP) |
2450 RCV_BUFSIZ_V(win);
2451 opt2 = RX_CHANNEL_V(0) |
2452 RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid);
2453
2454 if (enable_tcp_timestamps && req->tcpopt.tstamp)
2455 opt2 |= TSTAMPS_EN_F;
2456 if (enable_tcp_sack && req->tcpopt.sack)
2457 opt2 |= SACK_EN_F;
2458 if (wscale && enable_tcp_window_scaling)
2459 opt2 |= WND_SCALE_EN_F;
2460 if (enable_ecn) {
2461 const struct tcphdr *tcph;
2462 u32 hlen = ntohl(req->hdr_len);
2463
2464 if (CHELSIO_CHIP_VERSION(adapter_type) <= CHELSIO_T5)
2465 tcph = (const void *)(req + 1) + ETH_HDR_LEN_G(hlen) +
2466 IP_HDR_LEN_G(hlen);
2467 else
2468 tcph = (const void *)(req + 1) +
2469 T6_ETH_HDR_LEN_G(hlen) + T6_IP_HDR_LEN_G(hlen);
2470 if (tcph->ece && tcph->cwr)
2471 opt2 |= CCTRL_ECN_V(1);
2472 }
2473
2474 if (!is_t4(adapter_type)) {
2475 u32 isn = (get_random_u32() & ~7UL) - 1;
2476
2477 skb = get_skb(skb, roundup(sizeof(*rpl5), 16), GFP_KERNEL);
2478 rpl5 = __skb_put_zero(skb, roundup(sizeof(*rpl5), 16));
2479 rpl = (void *)rpl5;
2480 INIT_TP_WR_CPL(rpl5, CPL_PASS_ACCEPT_RPL, ep->hwtid);
2481 opt2 |= T5_OPT_2_VALID_F;
2482 opt2 |= CONG_CNTRL_V(CONG_ALG_TAHOE);
2483 opt2 |= T5_ISS_F;
2484 if (peer2peer)
2485 isn += 4;
2486 rpl5->iss = cpu_to_be32(isn);
2487 pr_debug("iss %u\n", be32_to_cpu(rpl5->iss));
2488 } else {
2489 skb = get_skb(skb, sizeof(*rpl), GFP_KERNEL);
2490 rpl = __skb_put_zero(skb, sizeof(*rpl));
2491 INIT_TP_WR_CPL(rpl, CPL_PASS_ACCEPT_RPL, ep->hwtid);
2492 }
2493
2494 rpl->opt0 = cpu_to_be64(opt0);
2495 rpl->opt2 = cpu_to_be32(opt2);
2496 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
2497 t4_set_arp_err_handler(skb, ep, pass_accept_rpl_arp_failure);
2498
2499 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
2500}
2501
2502static void reject_cr(struct c4iw_dev *dev, u32 hwtid, struct sk_buff *skb)
2503{
2504 pr_debug("c4iw_dev %p tid %u\n", dev, hwtid);
2505 skb_trim(skb, sizeof(struct cpl_tid_release));
2506 release_tid(&dev->rdev, hwtid, skb);
2507 return;
2508}
2509
2510static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb)
2511{
2512 struct c4iw_ep *child_ep = NULL, *parent_ep;
2513 struct cpl_pass_accept_req *req = cplhdr(skb);
2514 unsigned int stid = PASS_OPEN_TID_G(ntohl(req->tos_stid));
2515 struct tid_info *t = dev->rdev.lldi.tids;
2516 unsigned int hwtid = GET_TID(req);
2517 struct dst_entry *dst;
2518 __u8 local_ip[16], peer_ip[16];
2519 __be16 local_port, peer_port;
2520 struct sockaddr_in6 *sin6;
2521 int err;
2522 u16 peer_mss = ntohs(req->tcpopt.mss);
2523 int iptype;
2524 unsigned short hdrs;
2525 u8 tos;
2526
2527 parent_ep = (struct c4iw_ep *)get_ep_from_stid(dev, stid);
2528 if (!parent_ep) {
2529 pr_err("%s connect request on invalid stid %d\n",
2530 __func__, stid);
2531 goto reject;
2532 }
2533
2534 if (state_read(&parent_ep->com) != LISTEN) {
2535 pr_err("%s - listening ep not in LISTEN\n", __func__);
2536 goto reject;
2537 }
2538
2539 if (parent_ep->com.cm_id->tos_set)
2540 tos = parent_ep->com.cm_id->tos;
2541 else
2542 tos = PASS_OPEN_TOS_G(ntohl(req->tos_stid));
2543
2544 cxgb_get_4tuple(req, parent_ep->com.dev->rdev.lldi.adapter_type,
2545 &iptype, local_ip, peer_ip, &local_port, &peer_port);
2546
2547 /* Find output route */
2548 if (iptype == 4) {
2549 pr_debug("parent ep %p hwtid %u laddr %pI4 raddr %pI4 lport %d rport %d peer_mss %d\n"
2550 , parent_ep, hwtid,
2551 local_ip, peer_ip, ntohs(local_port),
2552 ntohs(peer_port), peer_mss);
2553 dst = cxgb_find_route(&dev->rdev.lldi, get_real_dev,
2554 *(__be32 *)local_ip, *(__be32 *)peer_ip,
2555 local_port, peer_port, tos);
2556 } else {
2557 pr_debug("parent ep %p hwtid %u laddr %pI6 raddr %pI6 lport %d rport %d peer_mss %d\n"
2558 , parent_ep, hwtid,
2559 local_ip, peer_ip, ntohs(local_port),
2560 ntohs(peer_port), peer_mss);
2561 dst = cxgb_find_route6(&dev->rdev.lldi, get_real_dev,
2562 local_ip, peer_ip, local_port, peer_port,
2563 tos,
2564 ((struct sockaddr_in6 *)
2565 &parent_ep->com.local_addr)->sin6_scope_id);
2566 }
2567 if (!dst) {
2568 pr_err("%s - failed to find dst entry!\n", __func__);
2569 goto reject;
2570 }
2571
2572 child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL);
2573 if (!child_ep) {
2574 pr_err("%s - failed to allocate ep entry!\n", __func__);
2575 dst_release(dst);
2576 goto reject;
2577 }
2578
2579 err = import_ep(child_ep, iptype, peer_ip, dst, dev, false,
2580 parent_ep->com.dev->rdev.lldi.adapter_type, tos);
2581 if (err) {
2582 pr_err("%s - failed to allocate l2t entry!\n", __func__);
2583 dst_release(dst);
2584 kfree(child_ep);
2585 goto reject;
2586 }
2587
2588 hdrs = ((iptype == 4) ? sizeof(struct iphdr) : sizeof(struct ipv6hdr)) +
2589 sizeof(struct tcphdr) +
2590 ((enable_tcp_timestamps && req->tcpopt.tstamp) ? 12 : 0);
2591 if (peer_mss && child_ep->mtu > (peer_mss + hdrs))
2592 child_ep->mtu = peer_mss + hdrs;
2593
2594 skb_queue_head_init(&child_ep->com.ep_skb_list);
2595 if (alloc_ep_skb_list(&child_ep->com.ep_skb_list, CN_MAX_CON_BUF))
2596 goto fail;
2597
2598 state_set(&child_ep->com, CONNECTING);
2599 child_ep->com.dev = dev;
2600 child_ep->com.cm_id = NULL;
2601
2602 if (iptype == 4) {
2603 struct sockaddr_in *sin = (struct sockaddr_in *)
2604 &child_ep->com.local_addr;
2605
2606 sin->sin_family = AF_INET;
2607 sin->sin_port = local_port;
2608 sin->sin_addr.s_addr = *(__be32 *)local_ip;
2609
2610 sin = (struct sockaddr_in *)&child_ep->com.local_addr;
2611 sin->sin_family = AF_INET;
2612 sin->sin_port = ((struct sockaddr_in *)
2613 &parent_ep->com.local_addr)->sin_port;
2614 sin->sin_addr.s_addr = *(__be32 *)local_ip;
2615
2616 sin = (struct sockaddr_in *)&child_ep->com.remote_addr;
2617 sin->sin_family = AF_INET;
2618 sin->sin_port = peer_port;
2619 sin->sin_addr.s_addr = *(__be32 *)peer_ip;
2620 } else {
2621 sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr;
2622 sin6->sin6_family = PF_INET6;
2623 sin6->sin6_port = local_port;
2624 memcpy(sin6->sin6_addr.s6_addr, local_ip, 16);
2625
2626 sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr;
2627 sin6->sin6_family = PF_INET6;
2628 sin6->sin6_port = ((struct sockaddr_in6 *)
2629 &parent_ep->com.local_addr)->sin6_port;
2630 memcpy(sin6->sin6_addr.s6_addr, local_ip, 16);
2631
2632 sin6 = (struct sockaddr_in6 *)&child_ep->com.remote_addr;
2633 sin6->sin6_family = PF_INET6;
2634 sin6->sin6_port = peer_port;
2635 memcpy(sin6->sin6_addr.s6_addr, peer_ip, 16);
2636 }
2637
2638 c4iw_get_ep(&parent_ep->com);
2639 child_ep->parent_ep = parent_ep;
2640 child_ep->tos = tos;
2641 child_ep->dst = dst;
2642 child_ep->hwtid = hwtid;
2643
2644 pr_debug("tx_chan %u smac_idx %u rss_qid %u\n",
2645 child_ep->tx_chan, child_ep->smac_idx, child_ep->rss_qid);
2646
2647 timer_setup(&child_ep->timer, ep_timeout, 0);
2648 cxgb4_insert_tid(t, child_ep, hwtid,
2649 child_ep->com.local_addr.ss_family);
2650 insert_ep_tid(child_ep);
2651 if (accept_cr(child_ep, skb, req)) {
2652 c4iw_put_ep(&parent_ep->com);
2653 release_ep_resources(child_ep);
2654 } else {
2655 set_bit(PASS_ACCEPT_REQ, &child_ep->com.history);
2656 }
2657 if (iptype == 6) {
2658 sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr;
2659 cxgb4_clip_get(child_ep->com.dev->rdev.lldi.ports[0],
2660 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
2661 }
2662 goto out;
2663fail:
2664 c4iw_put_ep(&child_ep->com);
2665reject:
2666 reject_cr(dev, hwtid, skb);
2667out:
2668 if (parent_ep)
2669 c4iw_put_ep(&parent_ep->com);
2670 return 0;
2671}
2672
2673static int pass_establish(struct c4iw_dev *dev, struct sk_buff *skb)
2674{
2675 struct c4iw_ep *ep;
2676 struct cpl_pass_establish *req = cplhdr(skb);
2677 unsigned int tid = GET_TID(req);
2678 int ret;
2679 u16 tcp_opt = ntohs(req->tcp_opt);
2680
2681 ep = get_ep_from_tid(dev, tid);
2682 if (!ep)
2683 return 0;
2684
2685 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
2686 ep->snd_seq = be32_to_cpu(req->snd_isn);
2687 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
2688 ep->snd_wscale = TCPOPT_SND_WSCALE_G(tcp_opt);
2689
2690 pr_debug("ep %p hwtid %u tcp_opt 0x%02x\n", ep, tid, tcp_opt);
2691
2692 set_emss(ep, tcp_opt);
2693
2694 dst_confirm(ep->dst);
2695 mutex_lock(&ep->com.mutex);
2696 ep->com.state = MPA_REQ_WAIT;
2697 start_ep_timer(ep);
2698 set_bit(PASS_ESTAB, &ep->com.history);
2699 ret = send_flowc(ep);
2700 mutex_unlock(&ep->com.mutex);
2701 if (ret)
2702 c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
2703 c4iw_put_ep(&ep->com);
2704
2705 return 0;
2706}
2707
2708static int peer_close(struct c4iw_dev *dev, struct sk_buff *skb)
2709{
2710 struct cpl_peer_close *hdr = cplhdr(skb);
2711 struct c4iw_ep *ep;
2712 struct c4iw_qp_attributes attrs;
2713 int disconnect = 1;
2714 int release = 0;
2715 unsigned int tid = GET_TID(hdr);
2716 int ret;
2717
2718 ep = get_ep_from_tid(dev, tid);
2719 if (!ep)
2720 return 0;
2721
2722 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
2723 dst_confirm(ep->dst);
2724
2725 set_bit(PEER_CLOSE, &ep->com.history);
2726 mutex_lock(&ep->com.mutex);
2727 switch (ep->com.state) {
2728 case MPA_REQ_WAIT:
2729 __state_set(&ep->com, CLOSING);
2730 break;
2731 case MPA_REQ_SENT:
2732 __state_set(&ep->com, CLOSING);
2733 connect_reply_upcall(ep, -ECONNRESET);
2734 break;
2735 case MPA_REQ_RCVD:
2736
2737 /*
2738 * We're gonna mark this puppy DEAD, but keep
2739 * the reference on it until the ULP accepts or
2740 * rejects the CR. Also wake up anyone waiting
2741 * in rdma connection migration (see c4iw_accept_cr()).
2742 */
2743 __state_set(&ep->com, CLOSING);
2744 pr_debug("waking up ep %p tid %u\n", ep, ep->hwtid);
2745 c4iw_wake_up_noref(ep->com.wr_waitp, -ECONNRESET);
2746 break;
2747 case MPA_REP_SENT:
2748 __state_set(&ep->com, CLOSING);
2749 pr_debug("waking up ep %p tid %u\n", ep, ep->hwtid);
2750 c4iw_wake_up_noref(ep->com.wr_waitp, -ECONNRESET);
2751 break;
2752 case FPDU_MODE:
2753 start_ep_timer(ep);
2754 __state_set(&ep->com, CLOSING);
2755 attrs.next_state = C4IW_QP_STATE_CLOSING;
2756 ret = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2757 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2758 if (ret != -ECONNRESET) {
2759 peer_close_upcall(ep);
2760 disconnect = 1;
2761 }
2762 break;
2763 case ABORTING:
2764 disconnect = 0;
2765 break;
2766 case CLOSING:
2767 __state_set(&ep->com, MORIBUND);
2768 disconnect = 0;
2769 break;
2770 case MORIBUND:
2771 (void)stop_ep_timer(ep);
2772 if (ep->com.cm_id && ep->com.qp) {
2773 attrs.next_state = C4IW_QP_STATE_IDLE;
2774 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2775 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2776 }
2777 close_complete_upcall(ep, 0);
2778 __state_set(&ep->com, DEAD);
2779 release = 1;
2780 disconnect = 0;
2781 break;
2782 case DEAD:
2783 disconnect = 0;
2784 break;
2785 default:
2786 WARN_ONCE(1, "Bad endpoint state %u\n", ep->com.state);
2787 }
2788 mutex_unlock(&ep->com.mutex);
2789 if (disconnect)
2790 c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
2791 if (release)
2792 release_ep_resources(ep);
2793 c4iw_put_ep(&ep->com);
2794 return 0;
2795}
2796
2797static void finish_peer_abort(struct c4iw_dev *dev, struct c4iw_ep *ep)
2798{
2799 complete_cached_srq_buffers(ep, ep->srqe_idx);
2800 if (ep->com.cm_id && ep->com.qp) {
2801 struct c4iw_qp_attributes attrs;
2802
2803 attrs.next_state = C4IW_QP_STATE_ERROR;
2804 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2805 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2806 }
2807 peer_abort_upcall(ep);
2808 release_ep_resources(ep);
2809 c4iw_put_ep(&ep->com);
2810}
2811
2812static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb)
2813{
2814 struct cpl_abort_req_rss6 *req = cplhdr(skb);
2815 struct c4iw_ep *ep;
2816 struct sk_buff *rpl_skb;
2817 struct c4iw_qp_attributes attrs;
2818 int ret;
2819 int release = 0;
2820 unsigned int tid = GET_TID(req);
2821 u8 status;
2822 u32 srqidx;
2823
2824 u32 len = roundup(sizeof(struct cpl_abort_rpl), 16);
2825
2826 ep = get_ep_from_tid(dev, tid);
2827 if (!ep)
2828 return 0;
2829
2830 status = ABORT_RSS_STATUS_G(be32_to_cpu(req->srqidx_status));
2831
2832 if (cxgb_is_neg_adv(status)) {
2833 pr_debug("Negative advice on abort- tid %u status %d (%s)\n",
2834 ep->hwtid, status, neg_adv_str(status));
2835 ep->stats.abort_neg_adv++;
2836 mutex_lock(&dev->rdev.stats.lock);
2837 dev->rdev.stats.neg_adv++;
2838 mutex_unlock(&dev->rdev.stats.lock);
2839 goto deref_ep;
2840 }
2841
2842 pr_debug("ep %p tid %u state %u\n", ep, ep->hwtid,
2843 ep->com.state);
2844 set_bit(PEER_ABORT, &ep->com.history);
2845
2846 /*
2847 * Wake up any threads in rdma_init() or rdma_fini().
2848 * However, this is not needed if com state is just
2849 * MPA_REQ_SENT
2850 */
2851 if (ep->com.state != MPA_REQ_SENT)
2852 c4iw_wake_up_noref(ep->com.wr_waitp, -ECONNRESET);
2853
2854 mutex_lock(&ep->com.mutex);
2855 switch (ep->com.state) {
2856 case CONNECTING:
2857 c4iw_put_ep(&ep->parent_ep->com);
2858 break;
2859 case MPA_REQ_WAIT:
2860 (void)stop_ep_timer(ep);
2861 break;
2862 case MPA_REQ_SENT:
2863 (void)stop_ep_timer(ep);
2864 if (status != CPL_ERR_CONN_RESET || mpa_rev == 1 ||
2865 (mpa_rev == 2 && ep->tried_with_mpa_v1))
2866 connect_reply_upcall(ep, -ECONNRESET);
2867 else {
2868 /*
2869 * we just don't send notification upwards because we
2870 * want to retry with mpa_v1 without upper layers even
2871 * knowing it.
2872 *
2873 * do some housekeeping so as to re-initiate the
2874 * connection
2875 */
2876 pr_info("%s: mpa_rev=%d. Retrying with mpav1\n",
2877 __func__, mpa_rev);
2878 ep->retry_with_mpa_v1 = 1;
2879 }
2880 break;
2881 case MPA_REP_SENT:
2882 break;
2883 case MPA_REQ_RCVD:
2884 break;
2885 case MORIBUND:
2886 case CLOSING:
2887 stop_ep_timer(ep);
2888 fallthrough;
2889 case FPDU_MODE:
2890 if (ep->com.qp && ep->com.qp->srq) {
2891 srqidx = ABORT_RSS_SRQIDX_G(
2892 be32_to_cpu(req->srqidx_status));
2893 if (srqidx) {
2894 complete_cached_srq_buffers(ep, srqidx);
2895 } else {
2896 /* Hold ep ref until finish_peer_abort() */
2897 c4iw_get_ep(&ep->com);
2898 __state_set(&ep->com, ABORTING);
2899 set_bit(PEER_ABORT_IN_PROGRESS, &ep->com.flags);
2900 read_tcb(ep);
2901 break;
2902
2903 }
2904 }
2905
2906 if (ep->com.cm_id && ep->com.qp) {
2907 attrs.next_state = C4IW_QP_STATE_ERROR;
2908 ret = c4iw_modify_qp(ep->com.qp->rhp,
2909 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
2910 &attrs, 1);
2911 if (ret)
2912 pr_err("%s - qp <- error failed!\n", __func__);
2913 }
2914 peer_abort_upcall(ep);
2915 break;
2916 case ABORTING:
2917 break;
2918 case DEAD:
2919 pr_warn("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__);
2920 mutex_unlock(&ep->com.mutex);
2921 goto deref_ep;
2922 default:
2923 WARN_ONCE(1, "Bad endpoint state %u\n", ep->com.state);
2924 break;
2925 }
2926 dst_confirm(ep->dst);
2927 if (ep->com.state != ABORTING) {
2928 __state_set(&ep->com, DEAD);
2929 /* we don't release if we want to retry with mpa_v1 */
2930 if (!ep->retry_with_mpa_v1)
2931 release = 1;
2932 }
2933 mutex_unlock(&ep->com.mutex);
2934
2935 rpl_skb = skb_dequeue(&ep->com.ep_skb_list);
2936 if (WARN_ON(!rpl_skb)) {
2937 release = 1;
2938 goto out;
2939 }
2940
2941 cxgb_mk_abort_rpl(rpl_skb, len, ep->hwtid, ep->txq_idx);
2942
2943 c4iw_ofld_send(&ep->com.dev->rdev, rpl_skb);
2944out:
2945 if (release)
2946 release_ep_resources(ep);
2947 else if (ep->retry_with_mpa_v1) {
2948 if (ep->com.remote_addr.ss_family == AF_INET6) {
2949 struct sockaddr_in6 *sin6 =
2950 (struct sockaddr_in6 *)
2951 &ep->com.local_addr;
2952 cxgb4_clip_release(
2953 ep->com.dev->rdev.lldi.ports[0],
2954 (const u32 *)&sin6->sin6_addr.s6_addr,
2955 1);
2956 }
2957 xa_erase_irq(&ep->com.dev->hwtids, ep->hwtid);
2958 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid,
2959 ep->com.local_addr.ss_family);
2960 dst_release(ep->dst);
2961 cxgb4_l2t_release(ep->l2t);
2962 c4iw_reconnect(ep);
2963 }
2964
2965deref_ep:
2966 c4iw_put_ep(&ep->com);
2967 /* Dereferencing ep, referenced in peer_abort_intr() */
2968 c4iw_put_ep(&ep->com);
2969 return 0;
2970}
2971
2972static int close_con_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2973{
2974 struct c4iw_ep *ep;
2975 struct c4iw_qp_attributes attrs;
2976 struct cpl_close_con_rpl *rpl = cplhdr(skb);
2977 int release = 0;
2978 unsigned int tid = GET_TID(rpl);
2979
2980 ep = get_ep_from_tid(dev, tid);
2981 if (!ep)
2982 return 0;
2983
2984 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
2985
2986 /* The cm_id may be null if we failed to connect */
2987 mutex_lock(&ep->com.mutex);
2988 set_bit(CLOSE_CON_RPL, &ep->com.history);
2989 switch (ep->com.state) {
2990 case CLOSING:
2991 __state_set(&ep->com, MORIBUND);
2992 break;
2993 case MORIBUND:
2994 (void)stop_ep_timer(ep);
2995 if ((ep->com.cm_id) && (ep->com.qp)) {
2996 attrs.next_state = C4IW_QP_STATE_IDLE;
2997 c4iw_modify_qp(ep->com.qp->rhp,
2998 ep->com.qp,
2999 C4IW_QP_ATTR_NEXT_STATE,
3000 &attrs, 1);
3001 }
3002 close_complete_upcall(ep, 0);
3003 __state_set(&ep->com, DEAD);
3004 release = 1;
3005 break;
3006 case ABORTING:
3007 case DEAD:
3008 break;
3009 default:
3010 WARN_ONCE(1, "Bad endpoint state %u\n", ep->com.state);
3011 break;
3012 }
3013 mutex_unlock(&ep->com.mutex);
3014 if (release)
3015 release_ep_resources(ep);
3016 c4iw_put_ep(&ep->com);
3017 return 0;
3018}
3019
3020static int terminate(struct c4iw_dev *dev, struct sk_buff *skb)
3021{
3022 struct cpl_rdma_terminate *rpl = cplhdr(skb);
3023 unsigned int tid = GET_TID(rpl);
3024 struct c4iw_ep *ep;
3025 struct c4iw_qp_attributes attrs;
3026
3027 ep = get_ep_from_tid(dev, tid);
3028
3029 if (ep) {
3030 if (ep->com.qp) {
3031 pr_warn("TERM received tid %u qpid %u\n", tid,
3032 ep->com.qp->wq.sq.qid);
3033 attrs.next_state = C4IW_QP_STATE_TERMINATE;
3034 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
3035 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
3036 }
3037
3038 /* As per draft-hilland-iwarp-verbs-v1.0, sec 6.2.3,
3039 * when entering the TERM state the RNIC MUST initiate a CLOSE.
3040 */
3041 c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
3042 c4iw_put_ep(&ep->com);
3043 } else
3044 pr_warn("TERM received tid %u no ep/qp\n", tid);
3045
3046 return 0;
3047}
3048
3049/*
3050 * Upcall from the adapter indicating data has been transmitted.
3051 * For us its just the single MPA request or reply. We can now free
3052 * the skb holding the mpa message.
3053 */
3054static int fw4_ack(struct c4iw_dev *dev, struct sk_buff *skb)
3055{
3056 struct c4iw_ep *ep;
3057 struct cpl_fw4_ack *hdr = cplhdr(skb);
3058 u8 credits = hdr->credits;
3059 unsigned int tid = GET_TID(hdr);
3060
3061
3062 ep = get_ep_from_tid(dev, tid);
3063 if (!ep)
3064 return 0;
3065 pr_debug("ep %p tid %u credits %u\n",
3066 ep, ep->hwtid, credits);
3067 if (credits == 0) {
3068 pr_debug("0 credit ack ep %p tid %u state %u\n",
3069 ep, ep->hwtid, state_read(&ep->com));
3070 goto out;
3071 }
3072
3073 dst_confirm(ep->dst);
3074 if (ep->mpa_skb) {
3075 pr_debug("last streaming msg ack ep %p tid %u state %u initiator %u freeing skb\n",
3076 ep, ep->hwtid, state_read(&ep->com),
3077 ep->mpa_attr.initiator ? 1 : 0);
3078 mutex_lock(&ep->com.mutex);
3079 kfree_skb(ep->mpa_skb);
3080 ep->mpa_skb = NULL;
3081 if (test_bit(STOP_MPA_TIMER, &ep->com.flags))
3082 stop_ep_timer(ep);
3083 mutex_unlock(&ep->com.mutex);
3084 }
3085out:
3086 c4iw_put_ep(&ep->com);
3087 return 0;
3088}
3089
3090int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3091{
3092 int abort;
3093 struct c4iw_ep *ep = to_ep(cm_id);
3094
3095 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
3096
3097 mutex_lock(&ep->com.mutex);
3098 if (ep->com.state != MPA_REQ_RCVD) {
3099 mutex_unlock(&ep->com.mutex);
3100 c4iw_put_ep(&ep->com);
3101 return -ECONNRESET;
3102 }
3103 set_bit(ULP_REJECT, &ep->com.history);
3104 if (mpa_rev == 0)
3105 abort = 1;
3106 else
3107 abort = send_mpa_reject(ep, pdata, pdata_len);
3108 mutex_unlock(&ep->com.mutex);
3109
3110 stop_ep_timer(ep);
3111 c4iw_ep_disconnect(ep, abort != 0, GFP_KERNEL);
3112 c4iw_put_ep(&ep->com);
3113 return 0;
3114}
3115
3116int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3117{
3118 int err;
3119 struct c4iw_qp_attributes attrs;
3120 enum c4iw_qp_attr_mask mask;
3121 struct c4iw_ep *ep = to_ep(cm_id);
3122 struct c4iw_dev *h = to_c4iw_dev(cm_id->device);
3123 struct c4iw_qp *qp = get_qhp(h, conn_param->qpn);
3124 int abort = 0;
3125
3126 pr_debug("ep %p tid %u\n", ep, ep->hwtid);
3127
3128 mutex_lock(&ep->com.mutex);
3129 if (ep->com.state != MPA_REQ_RCVD) {
3130 err = -ECONNRESET;
3131 goto err_out;
3132 }
3133
3134 if (!qp) {
3135 err = -EINVAL;
3136 goto err_out;
3137 }
3138
3139 set_bit(ULP_ACCEPT, &ep->com.history);
3140 if ((conn_param->ord > cur_max_read_depth(ep->com.dev)) ||
3141 (conn_param->ird > cur_max_read_depth(ep->com.dev))) {
3142 err = -EINVAL;
3143 goto err_abort;
3144 }
3145
3146 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
3147 if (conn_param->ord > ep->ird) {
3148 if (RELAXED_IRD_NEGOTIATION) {
3149 conn_param->ord = ep->ird;
3150 } else {
3151 ep->ird = conn_param->ird;
3152 ep->ord = conn_param->ord;
3153 send_mpa_reject(ep, conn_param->private_data,
3154 conn_param->private_data_len);
3155 err = -ENOMEM;
3156 goto err_abort;
3157 }
3158 }
3159 if (conn_param->ird < ep->ord) {
3160 if (RELAXED_IRD_NEGOTIATION &&
3161 ep->ord <= h->rdev.lldi.max_ordird_qp) {
3162 conn_param->ird = ep->ord;
3163 } else {
3164 err = -ENOMEM;
3165 goto err_abort;
3166 }
3167 }
3168 }
3169 ep->ird = conn_param->ird;
3170 ep->ord = conn_param->ord;
3171
3172 if (ep->mpa_attr.version == 1) {
3173 if (peer2peer && ep->ird == 0)
3174 ep->ird = 1;
3175 } else {
3176 if (peer2peer &&
3177 (ep->mpa_attr.p2p_type != FW_RI_INIT_P2PTYPE_DISABLED) &&
3178 (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ) && ep->ird == 0)
3179 ep->ird = 1;
3180 }
3181
3182 pr_debug("ird %d ord %d\n", ep->ird, ep->ord);
3183
3184 ep->com.cm_id = cm_id;
3185 ref_cm_id(&ep->com);
3186 ep->com.qp = qp;
3187 ref_qp(ep);
3188
3189 /* bind QP to EP and move to RTS */
3190 attrs.mpa_attr = ep->mpa_attr;
3191 attrs.max_ird = ep->ird;
3192 attrs.max_ord = ep->ord;
3193 attrs.llp_stream_handle = ep;
3194 attrs.next_state = C4IW_QP_STATE_RTS;
3195
3196 /* bind QP and TID with INIT_WR */
3197 mask = C4IW_QP_ATTR_NEXT_STATE |
3198 C4IW_QP_ATTR_LLP_STREAM_HANDLE |
3199 C4IW_QP_ATTR_MPA_ATTR |
3200 C4IW_QP_ATTR_MAX_IRD |
3201 C4IW_QP_ATTR_MAX_ORD;
3202
3203 err = c4iw_modify_qp(ep->com.qp->rhp,
3204 ep->com.qp, mask, &attrs, 1);
3205 if (err)
3206 goto err_deref_cm_id;
3207
3208 set_bit(STOP_MPA_TIMER, &ep->com.flags);
3209 err = send_mpa_reply(ep, conn_param->private_data,
3210 conn_param->private_data_len);
3211 if (err)
3212 goto err_deref_cm_id;
3213
3214 __state_set(&ep->com, FPDU_MODE);
3215 established_upcall(ep);
3216 mutex_unlock(&ep->com.mutex);
3217 c4iw_put_ep(&ep->com);
3218 return 0;
3219err_deref_cm_id:
3220 deref_cm_id(&ep->com);
3221err_abort:
3222 abort = 1;
3223err_out:
3224 mutex_unlock(&ep->com.mutex);
3225 if (abort)
3226 c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
3227 c4iw_put_ep(&ep->com);
3228 return err;
3229}
3230
3231static int pick_local_ipaddrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
3232{
3233 struct in_device *ind;
3234 int found = 0;
3235 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
3236 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
3237 const struct in_ifaddr *ifa;
3238
3239 ind = in_dev_get(dev->rdev.lldi.ports[0]);
3240 if (!ind)
3241 return -EADDRNOTAVAIL;
3242 rcu_read_lock();
3243 in_dev_for_each_ifa_rcu(ifa, ind) {
3244 if (ifa->ifa_flags & IFA_F_SECONDARY)
3245 continue;
3246 laddr->sin_addr.s_addr = ifa->ifa_address;
3247 raddr->sin_addr.s_addr = ifa->ifa_address;
3248 found = 1;
3249 break;
3250 }
3251 rcu_read_unlock();
3252
3253 in_dev_put(ind);
3254 return found ? 0 : -EADDRNOTAVAIL;
3255}
3256
3257static int get_lladdr(struct net_device *dev, struct in6_addr *addr,
3258 unsigned char banned_flags)
3259{
3260 struct inet6_dev *idev;
3261 int err = -EADDRNOTAVAIL;
3262
3263 rcu_read_lock();
3264 idev = __in6_dev_get(dev);
3265 if (idev != NULL) {
3266 struct inet6_ifaddr *ifp;
3267
3268 read_lock_bh(&idev->lock);
3269 list_for_each_entry(ifp, &idev->addr_list, if_list) {
3270 if (ifp->scope == IFA_LINK &&
3271 !(ifp->flags & banned_flags)) {
3272 memcpy(addr, &ifp->addr, 16);
3273 err = 0;
3274 break;
3275 }
3276 }
3277 read_unlock_bh(&idev->lock);
3278 }
3279 rcu_read_unlock();
3280 return err;
3281}
3282
3283static int pick_local_ip6addrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
3284{
3285 struct in6_addr addr;
3286 struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
3287 struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr;
3288
3289 if (!get_lladdr(dev->rdev.lldi.ports[0], &addr, IFA_F_TENTATIVE)) {
3290 memcpy(la6->sin6_addr.s6_addr, &addr, 16);
3291 memcpy(ra6->sin6_addr.s6_addr, &addr, 16);
3292 return 0;
3293 }
3294 return -EADDRNOTAVAIL;
3295}
3296
3297int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3298{
3299 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
3300 struct c4iw_ep *ep;
3301 int err = 0;
3302 struct sockaddr_in *laddr;
3303 struct sockaddr_in *raddr;
3304 struct sockaddr_in6 *laddr6;
3305 struct sockaddr_in6 *raddr6;
3306 __u8 *ra;
3307 int iptype;
3308
3309 if ((conn_param->ord > cur_max_read_depth(dev)) ||
3310 (conn_param->ird > cur_max_read_depth(dev))) {
3311 err = -EINVAL;
3312 goto out;
3313 }
3314 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
3315 if (!ep) {
3316 pr_err("%s - cannot alloc ep\n", __func__);
3317 err = -ENOMEM;
3318 goto out;
3319 }
3320
3321 skb_queue_head_init(&ep->com.ep_skb_list);
3322 if (alloc_ep_skb_list(&ep->com.ep_skb_list, CN_MAX_CON_BUF)) {
3323 err = -ENOMEM;
3324 goto fail1;
3325 }
3326
3327 timer_setup(&ep->timer, ep_timeout, 0);
3328 ep->plen = conn_param->private_data_len;
3329 if (ep->plen)
3330 memcpy(ep->mpa_pkt + sizeof(struct mpa_message),
3331 conn_param->private_data, ep->plen);
3332 ep->ird = conn_param->ird;
3333 ep->ord = conn_param->ord;
3334
3335 if (peer2peer && ep->ord == 0)
3336 ep->ord = 1;
3337
3338 ep->com.cm_id = cm_id;
3339 ref_cm_id(&ep->com);
3340 cm_id->provider_data = ep;
3341 ep->com.dev = dev;
3342 ep->com.qp = get_qhp(dev, conn_param->qpn);
3343 if (!ep->com.qp) {
3344 pr_warn("%s qpn 0x%x not found!\n", __func__, conn_param->qpn);
3345 err = -EINVAL;
3346 goto fail2;
3347 }
3348 ref_qp(ep);
3349 pr_debug("qpn 0x%x qp %p cm_id %p\n", conn_param->qpn,
3350 ep->com.qp, cm_id);
3351
3352 /*
3353 * Allocate an active TID to initiate a TCP connection.
3354 */
3355 ep->atid = cxgb4_alloc_atid(dev->rdev.lldi.tids, ep);
3356 if (ep->atid == -1) {
3357 pr_err("%s - cannot alloc atid\n", __func__);
3358 err = -ENOMEM;
3359 goto fail2;
3360 }
3361 err = xa_insert_irq(&dev->atids, ep->atid, ep, GFP_KERNEL);
3362 if (err)
3363 goto fail5;
3364
3365 memcpy(&ep->com.local_addr, &cm_id->m_local_addr,
3366 sizeof(ep->com.local_addr));
3367 memcpy(&ep->com.remote_addr, &cm_id->m_remote_addr,
3368 sizeof(ep->com.remote_addr));
3369
3370 laddr = (struct sockaddr_in *)&ep->com.local_addr;
3371 raddr = (struct sockaddr_in *)&ep->com.remote_addr;
3372 laddr6 = (struct sockaddr_in6 *)&ep->com.local_addr;
3373 raddr6 = (struct sockaddr_in6 *) &ep->com.remote_addr;
3374
3375 if (cm_id->m_remote_addr.ss_family == AF_INET) {
3376 iptype = 4;
3377 ra = (__u8 *)&raddr->sin_addr;
3378
3379 /*
3380 * Handle loopback requests to INADDR_ANY.
3381 */
3382 if (raddr->sin_addr.s_addr == htonl(INADDR_ANY)) {
3383 err = pick_local_ipaddrs(dev, cm_id);
3384 if (err)
3385 goto fail3;
3386 }
3387
3388 /* find a route */
3389 pr_debug("saddr %pI4 sport 0x%x raddr %pI4 rport 0x%x\n",
3390 &laddr->sin_addr, ntohs(laddr->sin_port),
3391 ra, ntohs(raddr->sin_port));
3392 ep->dst = cxgb_find_route(&dev->rdev.lldi, get_real_dev,
3393 laddr->sin_addr.s_addr,
3394 raddr->sin_addr.s_addr,
3395 laddr->sin_port,
3396 raddr->sin_port, cm_id->tos);
3397 } else {
3398 iptype = 6;
3399 ra = (__u8 *)&raddr6->sin6_addr;
3400
3401 /*
3402 * Handle loopback requests to INADDR_ANY.
3403 */
3404 if (ipv6_addr_type(&raddr6->sin6_addr) == IPV6_ADDR_ANY) {
3405 err = pick_local_ip6addrs(dev, cm_id);
3406 if (err)
3407 goto fail3;
3408 }
3409
3410 /* find a route */
3411 pr_debug("saddr %pI6 sport 0x%x raddr %pI6 rport 0x%x\n",
3412 laddr6->sin6_addr.s6_addr,
3413 ntohs(laddr6->sin6_port),
3414 raddr6->sin6_addr.s6_addr, ntohs(raddr6->sin6_port));
3415 ep->dst = cxgb_find_route6(&dev->rdev.lldi, get_real_dev,
3416 laddr6->sin6_addr.s6_addr,
3417 raddr6->sin6_addr.s6_addr,
3418 laddr6->sin6_port,
3419 raddr6->sin6_port, cm_id->tos,
3420 raddr6->sin6_scope_id);
3421 }
3422 if (!ep->dst) {
3423 pr_err("%s - cannot find route\n", __func__);
3424 err = -EHOSTUNREACH;
3425 goto fail3;
3426 }
3427
3428 err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, true,
3429 ep->com.dev->rdev.lldi.adapter_type, cm_id->tos);
3430 if (err) {
3431 pr_err("%s - cannot alloc l2e\n", __func__);
3432 goto fail4;
3433 }
3434
3435 pr_debug("txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
3436 ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
3437 ep->l2t->idx);
3438
3439 state_set(&ep->com, CONNECTING);
3440 ep->tos = cm_id->tos;
3441
3442 /* send connect request to rnic */
3443 err = send_connect(ep);
3444 if (!err)
3445 goto out;
3446
3447 cxgb4_l2t_release(ep->l2t);
3448fail4:
3449 dst_release(ep->dst);
3450fail3:
3451 xa_erase_irq(&ep->com.dev->atids, ep->atid);
3452fail5:
3453 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
3454fail2:
3455 skb_queue_purge(&ep->com.ep_skb_list);
3456 deref_cm_id(&ep->com);
3457fail1:
3458 c4iw_put_ep(&ep->com);
3459out:
3460 return err;
3461}
3462
3463static int create_server6(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
3464{
3465 int err;
3466 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)
3467 &ep->com.local_addr;
3468
3469 if (ipv6_addr_type(&sin6->sin6_addr) != IPV6_ADDR_ANY) {
3470 err = cxgb4_clip_get(ep->com.dev->rdev.lldi.ports[0],
3471 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
3472 if (err)
3473 return err;
3474 }
3475 c4iw_init_wr_wait(ep->com.wr_waitp);
3476 err = cxgb4_create_server6(ep->com.dev->rdev.lldi.ports[0],
3477 ep->stid, &sin6->sin6_addr,
3478 sin6->sin6_port,
3479 ep->com.dev->rdev.lldi.rxq_ids[0]);
3480 if (!err)
3481 err = c4iw_wait_for_reply(&ep->com.dev->rdev,
3482 ep->com.wr_waitp,
3483 0, 0, __func__);
3484 else if (err > 0)
3485 err = net_xmit_errno(err);
3486 if (err) {
3487 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
3488 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
3489 pr_err("cxgb4_create_server6/filter failed err %d stid %d laddr %pI6 lport %d\n",
3490 err, ep->stid,
3491 sin6->sin6_addr.s6_addr, ntohs(sin6->sin6_port));
3492 }
3493 return err;
3494}
3495
3496static int create_server4(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
3497{
3498 int err;
3499 struct sockaddr_in *sin = (struct sockaddr_in *)
3500 &ep->com.local_addr;
3501
3502 if (dev->rdev.lldi.enable_fw_ofld_conn) {
3503 do {
3504 err = cxgb4_create_server_filter(
3505 ep->com.dev->rdev.lldi.ports[0], ep->stid,
3506 sin->sin_addr.s_addr, sin->sin_port, 0,
3507 ep->com.dev->rdev.lldi.rxq_ids[0], 0, 0);
3508 if (err == -EBUSY) {
3509 if (c4iw_fatal_error(&ep->com.dev->rdev)) {
3510 err = -EIO;
3511 break;
3512 }
3513 set_current_state(TASK_UNINTERRUPTIBLE);
3514 schedule_timeout(usecs_to_jiffies(100));
3515 }
3516 } while (err == -EBUSY);
3517 } else {
3518 c4iw_init_wr_wait(ep->com.wr_waitp);
3519 err = cxgb4_create_server(ep->com.dev->rdev.lldi.ports[0],
3520 ep->stid, sin->sin_addr.s_addr, sin->sin_port,
3521 0, ep->com.dev->rdev.lldi.rxq_ids[0]);
3522 if (!err)
3523 err = c4iw_wait_for_reply(&ep->com.dev->rdev,
3524 ep->com.wr_waitp,
3525 0, 0, __func__);
3526 else if (err > 0)
3527 err = net_xmit_errno(err);
3528 }
3529 if (err)
3530 pr_err("cxgb4_create_server/filter failed err %d stid %d laddr %pI4 lport %d\n"
3531 , err, ep->stid,
3532 &sin->sin_addr, ntohs(sin->sin_port));
3533 return err;
3534}
3535
3536int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog)
3537{
3538 int err = 0;
3539 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
3540 struct c4iw_listen_ep *ep;
3541
3542 might_sleep();
3543
3544 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
3545 if (!ep) {
3546 pr_err("%s - cannot alloc ep\n", __func__);
3547 err = -ENOMEM;
3548 goto fail1;
3549 }
3550 skb_queue_head_init(&ep->com.ep_skb_list);
3551 pr_debug("ep %p\n", ep);
3552 ep->com.cm_id = cm_id;
3553 ref_cm_id(&ep->com);
3554 ep->com.dev = dev;
3555 ep->backlog = backlog;
3556 memcpy(&ep->com.local_addr, &cm_id->m_local_addr,
3557 sizeof(ep->com.local_addr));
3558
3559 /*
3560 * Allocate a server TID.
3561 */
3562 if (dev->rdev.lldi.enable_fw_ofld_conn &&
3563 ep->com.local_addr.ss_family == AF_INET)
3564 ep->stid = cxgb4_alloc_sftid(dev->rdev.lldi.tids,
3565 cm_id->m_local_addr.ss_family, ep);
3566 else
3567 ep->stid = cxgb4_alloc_stid(dev->rdev.lldi.tids,
3568 cm_id->m_local_addr.ss_family, ep);
3569
3570 if (ep->stid == -1) {
3571 pr_err("%s - cannot alloc stid\n", __func__);
3572 err = -ENOMEM;
3573 goto fail2;
3574 }
3575 err = xa_insert_irq(&dev->stids, ep->stid, ep, GFP_KERNEL);
3576 if (err)
3577 goto fail3;
3578
3579 state_set(&ep->com, LISTEN);
3580 if (ep->com.local_addr.ss_family == AF_INET)
3581 err = create_server4(dev, ep);
3582 else
3583 err = create_server6(dev, ep);
3584 if (!err) {
3585 cm_id->provider_data = ep;
3586 goto out;
3587 }
3588 xa_erase_irq(&ep->com.dev->stids, ep->stid);
3589fail3:
3590 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
3591 ep->com.local_addr.ss_family);
3592fail2:
3593 deref_cm_id(&ep->com);
3594 c4iw_put_ep(&ep->com);
3595fail1:
3596out:
3597 return err;
3598}
3599
3600int c4iw_destroy_listen(struct iw_cm_id *cm_id)
3601{
3602 int err;
3603 struct c4iw_listen_ep *ep = to_listen_ep(cm_id);
3604
3605 pr_debug("ep %p\n", ep);
3606
3607 might_sleep();
3608 state_set(&ep->com, DEAD);
3609 if (ep->com.dev->rdev.lldi.enable_fw_ofld_conn &&
3610 ep->com.local_addr.ss_family == AF_INET) {
3611 err = cxgb4_remove_server_filter(
3612 ep->com.dev->rdev.lldi.ports[0], ep->stid,
3613 ep->com.dev->rdev.lldi.rxq_ids[0], false);
3614 } else {
3615 struct sockaddr_in6 *sin6;
3616 c4iw_init_wr_wait(ep->com.wr_waitp);
3617 err = cxgb4_remove_server(
3618 ep->com.dev->rdev.lldi.ports[0], ep->stid,
3619 ep->com.dev->rdev.lldi.rxq_ids[0],
3620 ep->com.local_addr.ss_family == AF_INET6);
3621 if (err)
3622 goto done;
3623 err = c4iw_wait_for_reply(&ep->com.dev->rdev, ep->com.wr_waitp,
3624 0, 0, __func__);
3625 sin6 = (struct sockaddr_in6 *)&ep->com.local_addr;
3626 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
3627 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
3628 }
3629 xa_erase_irq(&ep->com.dev->stids, ep->stid);
3630 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
3631 ep->com.local_addr.ss_family);
3632done:
3633 deref_cm_id(&ep->com);
3634 c4iw_put_ep(&ep->com);
3635 return err;
3636}
3637
3638int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp)
3639{
3640 int ret = 0;
3641 int close = 0;
3642 int fatal = 0;
3643 struct c4iw_rdev *rdev;
3644
3645 mutex_lock(&ep->com.mutex);
3646
3647 pr_debug("ep %p state %s, abrupt %d\n", ep,
3648 states[ep->com.state], abrupt);
3649
3650 /*
3651 * Ref the ep here in case we have fatal errors causing the
3652 * ep to be released and freed.
3653 */
3654 c4iw_get_ep(&ep->com);
3655
3656 rdev = &ep->com.dev->rdev;
3657 if (c4iw_fatal_error(rdev)) {
3658 fatal = 1;
3659 close_complete_upcall(ep, -EIO);
3660 ep->com.state = DEAD;
3661 }
3662 switch (ep->com.state) {
3663 case MPA_REQ_WAIT:
3664 case MPA_REQ_SENT:
3665 case MPA_REQ_RCVD:
3666 case MPA_REP_SENT:
3667 case FPDU_MODE:
3668 case CONNECTING:
3669 close = 1;
3670 if (abrupt)
3671 ep->com.state = ABORTING;
3672 else {
3673 ep->com.state = CLOSING;
3674
3675 /*
3676 * if we close before we see the fw4_ack() then we fix
3677 * up the timer state since we're reusing it.
3678 */
3679 if (ep->mpa_skb &&
3680 test_bit(STOP_MPA_TIMER, &ep->com.flags)) {
3681 clear_bit(STOP_MPA_TIMER, &ep->com.flags);
3682 stop_ep_timer(ep);
3683 }
3684 start_ep_timer(ep);
3685 }
3686 set_bit(CLOSE_SENT, &ep->com.flags);
3687 break;
3688 case CLOSING:
3689 if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
3690 close = 1;
3691 if (abrupt) {
3692 (void)stop_ep_timer(ep);
3693 ep->com.state = ABORTING;
3694 } else
3695 ep->com.state = MORIBUND;
3696 }
3697 break;
3698 case MORIBUND:
3699 case ABORTING:
3700 case DEAD:
3701 pr_debug("ignoring disconnect ep %p state %u\n",
3702 ep, ep->com.state);
3703 break;
3704 default:
3705 WARN_ONCE(1, "Bad endpoint state %u\n", ep->com.state);
3706 break;
3707 }
3708
3709 if (close) {
3710 if (abrupt) {
3711 set_bit(EP_DISC_ABORT, &ep->com.history);
3712 ret = send_abort(ep);
3713 } else {
3714 set_bit(EP_DISC_CLOSE, &ep->com.history);
3715 ret = send_halfclose(ep);
3716 }
3717 if (ret) {
3718 set_bit(EP_DISC_FAIL, &ep->com.history);
3719 if (!abrupt) {
3720 stop_ep_timer(ep);
3721 close_complete_upcall(ep, -EIO);
3722 }
3723 if (ep->com.qp) {
3724 struct c4iw_qp_attributes attrs;
3725
3726 attrs.next_state = C4IW_QP_STATE_ERROR;
3727 ret = c4iw_modify_qp(ep->com.qp->rhp,
3728 ep->com.qp,
3729 C4IW_QP_ATTR_NEXT_STATE,
3730 &attrs, 1);
3731 if (ret)
3732 pr_err("%s - qp <- error failed!\n",
3733 __func__);
3734 }
3735 fatal = 1;
3736 }
3737 }
3738 mutex_unlock(&ep->com.mutex);
3739 c4iw_put_ep(&ep->com);
3740 if (fatal)
3741 release_ep_resources(ep);
3742 return ret;
3743}
3744
3745static void active_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
3746 struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
3747{
3748 struct c4iw_ep *ep;
3749 int atid = be32_to_cpu(req->tid);
3750
3751 ep = (struct c4iw_ep *)lookup_atid(dev->rdev.lldi.tids,
3752 (__force u32) req->tid);
3753 if (!ep)
3754 return;
3755
3756 switch (req->retval) {
3757 case FW_ENOMEM:
3758 set_bit(ACT_RETRY_NOMEM, &ep->com.history);
3759 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
3760 send_fw_act_open_req(ep, atid);
3761 return;
3762 }
3763 fallthrough;
3764 case FW_EADDRINUSE:
3765 set_bit(ACT_RETRY_INUSE, &ep->com.history);
3766 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
3767 send_fw_act_open_req(ep, atid);
3768 return;
3769 }
3770 break;
3771 default:
3772 pr_info("%s unexpected ofld conn wr retval %d\n",
3773 __func__, req->retval);
3774 break;
3775 }
3776 pr_err("active ofld_connect_wr failure %d atid %d\n",
3777 req->retval, atid);
3778 mutex_lock(&dev->rdev.stats.lock);
3779 dev->rdev.stats.act_ofld_conn_fails++;
3780 mutex_unlock(&dev->rdev.stats.lock);
3781 connect_reply_upcall(ep, status2errno(req->retval));
3782 state_set(&ep->com, DEAD);
3783 if (ep->com.remote_addr.ss_family == AF_INET6) {
3784 struct sockaddr_in6 *sin6 =
3785 (struct sockaddr_in6 *)&ep->com.local_addr;
3786 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
3787 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
3788 }
3789 xa_erase_irq(&dev->atids, atid);
3790 cxgb4_free_atid(dev->rdev.lldi.tids, atid);
3791 dst_release(ep->dst);
3792 cxgb4_l2t_release(ep->l2t);
3793 c4iw_put_ep(&ep->com);
3794}
3795
3796static void passive_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
3797 struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
3798{
3799 struct sk_buff *rpl_skb;
3800 struct cpl_pass_accept_req *cpl;
3801 int ret;
3802
3803 rpl_skb = (struct sk_buff *)(unsigned long)req->cookie;
3804 if (req->retval) {
3805 pr_err("%s passive open failure %d\n", __func__, req->retval);
3806 mutex_lock(&dev->rdev.stats.lock);
3807 dev->rdev.stats.pas_ofld_conn_fails++;
3808 mutex_unlock(&dev->rdev.stats.lock);
3809 kfree_skb(rpl_skb);
3810 } else {
3811 cpl = (struct cpl_pass_accept_req *)cplhdr(rpl_skb);
3812 OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ,
3813 (__force u32) htonl(
3814 (__force u32) req->tid)));
3815 ret = pass_accept_req(dev, rpl_skb);
3816 if (!ret)
3817 kfree_skb(rpl_skb);
3818 }
3819 return;
3820}
3821
3822static inline u64 t4_tcb_get_field64(__be64 *tcb, u16 word)
3823{
3824 u64 tlo = be64_to_cpu(tcb[((31 - word) / 2)]);
3825 u64 thi = be64_to_cpu(tcb[((31 - word) / 2) - 1]);
3826 u64 t;
3827 u32 shift = 32;
3828
3829 t = (thi << shift) | (tlo >> shift);
3830
3831 return t;
3832}
3833
3834static inline u32 t4_tcb_get_field32(__be64 *tcb, u16 word, u32 mask, u32 shift)
3835{
3836 u32 v;
3837 u64 t = be64_to_cpu(tcb[(31 - word) / 2]);
3838
3839 if (word & 0x1)
3840 shift += 32;
3841 v = (t >> shift) & mask;
3842 return v;
3843}
3844
3845static int read_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
3846{
3847 struct cpl_get_tcb_rpl *rpl = cplhdr(skb);
3848 __be64 *tcb = (__be64 *)(rpl + 1);
3849 unsigned int tid = GET_TID(rpl);
3850 struct c4iw_ep *ep;
3851 u64 t_flags_64;
3852 u32 rx_pdu_out;
3853
3854 ep = get_ep_from_tid(dev, tid);
3855 if (!ep)
3856 return 0;
3857 /* Examine the TF_RX_PDU_OUT (bit 49 of the t_flags) in order to
3858 * determine if there's a rx PDU feedback event pending.
3859 *
3860 * If that bit is set, it means we'll need to re-read the TCB's
3861 * rq_start value. The final value is the one present in a TCB
3862 * with the TF_RX_PDU_OUT bit cleared.
3863 */
3864
3865 t_flags_64 = t4_tcb_get_field64(tcb, TCB_T_FLAGS_W);
3866 rx_pdu_out = (t_flags_64 & TF_RX_PDU_OUT_V(1)) >> TF_RX_PDU_OUT_S;
3867
3868 c4iw_put_ep(&ep->com); /* from get_ep_from_tid() */
3869 c4iw_put_ep(&ep->com); /* from read_tcb() */
3870
3871 /* If TF_RX_PDU_OUT bit is set, re-read the TCB */
3872 if (rx_pdu_out) {
3873 if (++ep->rx_pdu_out_cnt >= 2) {
3874 WARN_ONCE(1, "tcb re-read() reached the guard limit, finishing the cleanup\n");
3875 goto cleanup;
3876 }
3877 read_tcb(ep);
3878 return 0;
3879 }
3880
3881 ep->srqe_idx = t4_tcb_get_field32(tcb, TCB_RQ_START_W, TCB_RQ_START_M,
3882 TCB_RQ_START_S);
3883cleanup:
3884 pr_debug("ep %p tid %u %016x\n", ep, ep->hwtid, ep->srqe_idx);
3885
3886 if (test_bit(PEER_ABORT_IN_PROGRESS, &ep->com.flags))
3887 finish_peer_abort(dev, ep);
3888 else if (test_bit(ABORT_REQ_IN_PROGRESS, &ep->com.flags))
3889 send_abort_req(ep);
3890 else
3891 WARN_ONCE(1, "unexpected state!");
3892
3893 return 0;
3894}
3895
3896static int deferred_fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
3897{
3898 struct cpl_fw6_msg *rpl = cplhdr(skb);
3899 struct cpl_fw6_msg_ofld_connection_wr_rpl *req;
3900
3901 switch (rpl->type) {
3902 case FW6_TYPE_CQE:
3903 c4iw_ev_dispatch(dev, (struct t4_cqe *)&rpl->data[0]);
3904 break;
3905 case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
3906 req = (struct cpl_fw6_msg_ofld_connection_wr_rpl *)rpl->data;
3907 switch (req->t_state) {
3908 case TCP_SYN_SENT:
3909 active_ofld_conn_reply(dev, skb, req);
3910 break;
3911 case TCP_SYN_RECV:
3912 passive_ofld_conn_reply(dev, skb, req);
3913 break;
3914 default:
3915 pr_err("%s unexpected ofld conn wr state %d\n",
3916 __func__, req->t_state);
3917 break;
3918 }
3919 break;
3920 }
3921 return 0;
3922}
3923
3924static void build_cpl_pass_accept_req(struct sk_buff *skb, int stid , u8 tos)
3925{
3926 __be32 l2info;
3927 __be16 hdr_len, vlantag, len;
3928 u16 eth_hdr_len;
3929 int tcp_hdr_len, ip_hdr_len;
3930 u8 intf;
3931 struct cpl_rx_pkt *cpl = cplhdr(skb);
3932 struct cpl_pass_accept_req *req;
3933 struct tcp_options_received tmp_opt;
3934 struct c4iw_dev *dev;
3935 enum chip_type type;
3936
3937 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
3938 /* Store values from cpl_rx_pkt in temporary location. */
3939 vlantag = cpl->vlan;
3940 len = cpl->len;
3941 l2info = cpl->l2info;
3942 hdr_len = cpl->hdr_len;
3943 intf = cpl->iff;
3944
3945 __skb_pull(skb, sizeof(*req) + sizeof(struct rss_header));
3946
3947 /*
3948 * We need to parse the TCP options from SYN packet.
3949 * to generate cpl_pass_accept_req.
3950 */
3951 memset(&tmp_opt, 0, sizeof(tmp_opt));
3952 tcp_clear_options(&tmp_opt);
3953 tcp_parse_options(&init_net, skb, &tmp_opt, 0, NULL);
3954
3955 req = __skb_push(skb, sizeof(*req));
3956 memset(req, 0, sizeof(*req));
3957 req->l2info = cpu_to_be16(SYN_INTF_V(intf) |
3958 SYN_MAC_IDX_V(RX_MACIDX_G(
3959 be32_to_cpu(l2info))) |
3960 SYN_XACT_MATCH_F);
3961 type = dev->rdev.lldi.adapter_type;
3962 tcp_hdr_len = RX_TCPHDR_LEN_G(be16_to_cpu(hdr_len));
3963 ip_hdr_len = RX_IPHDR_LEN_G(be16_to_cpu(hdr_len));
3964 req->hdr_len =
3965 cpu_to_be32(SYN_RX_CHAN_V(RX_CHAN_G(be32_to_cpu(l2info))));
3966 if (CHELSIO_CHIP_VERSION(type) <= CHELSIO_T5) {
3967 eth_hdr_len = is_t4(type) ?
3968 RX_ETHHDR_LEN_G(be32_to_cpu(l2info)) :
3969 RX_T5_ETHHDR_LEN_G(be32_to_cpu(l2info));
3970 req->hdr_len |= cpu_to_be32(TCP_HDR_LEN_V(tcp_hdr_len) |
3971 IP_HDR_LEN_V(ip_hdr_len) |
3972 ETH_HDR_LEN_V(eth_hdr_len));
3973 } else { /* T6 and later */
3974 eth_hdr_len = RX_T6_ETHHDR_LEN_G(be32_to_cpu(l2info));
3975 req->hdr_len |= cpu_to_be32(T6_TCP_HDR_LEN_V(tcp_hdr_len) |
3976 T6_IP_HDR_LEN_V(ip_hdr_len) |
3977 T6_ETH_HDR_LEN_V(eth_hdr_len));
3978 }
3979 req->vlan = vlantag;
3980 req->len = len;
3981 req->tos_stid = cpu_to_be32(PASS_OPEN_TID_V(stid) |
3982 PASS_OPEN_TOS_V(tos));
3983 req->tcpopt.mss = htons(tmp_opt.mss_clamp);
3984 if (tmp_opt.wscale_ok)
3985 req->tcpopt.wsf = tmp_opt.snd_wscale;
3986 req->tcpopt.tstamp = tmp_opt.saw_tstamp;
3987 if (tmp_opt.sack_ok)
3988 req->tcpopt.sack = 1;
3989 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ, 0));
3990 return;
3991}
3992
3993static void send_fw_pass_open_req(struct c4iw_dev *dev, struct sk_buff *skb,
3994 __be32 laddr, __be16 lport,
3995 __be32 raddr, __be16 rport,
3996 u32 rcv_isn, u32 filter, u16 window,
3997 u32 rss_qid, u8 port_id)
3998{
3999 struct sk_buff *req_skb;
4000 struct fw_ofld_connection_wr *req;
4001 struct cpl_pass_accept_req *cpl = cplhdr(skb);
4002 int ret;
4003
4004 req_skb = alloc_skb(sizeof(struct fw_ofld_connection_wr), GFP_KERNEL);
4005 if (!req_skb)
4006 return;
4007 req = __skb_put_zero(req_skb, sizeof(*req));
4008 req->op_compl = htonl(WR_OP_V(FW_OFLD_CONNECTION_WR) | FW_WR_COMPL_F);
4009 req->len16_pkd = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*req), 16)));
4010 req->le.version_cpl = htonl(FW_OFLD_CONNECTION_WR_CPL_F);
4011 req->le.filter = (__force __be32) filter;
4012 req->le.lport = lport;
4013 req->le.pport = rport;
4014 req->le.u.ipv4.lip = laddr;
4015 req->le.u.ipv4.pip = raddr;
4016 req->tcb.rcv_nxt = htonl(rcv_isn + 1);
4017 req->tcb.rcv_adv = htons(window);
4018 req->tcb.t_state_to_astid =
4019 htonl(FW_OFLD_CONNECTION_WR_T_STATE_V(TCP_SYN_RECV) |
4020 FW_OFLD_CONNECTION_WR_RCV_SCALE_V(cpl->tcpopt.wsf) |
4021 FW_OFLD_CONNECTION_WR_ASTID_V(
4022 PASS_OPEN_TID_G(ntohl(cpl->tos_stid))));
4023
4024 /*
4025 * We store the qid in opt2 which will be used by the firmware
4026 * to send us the wr response.
4027 */
4028 req->tcb.opt2 = htonl(RSS_QUEUE_V(rss_qid));
4029
4030 /*
4031 * We initialize the MSS index in TCB to 0xF.
4032 * So that when driver sends cpl_pass_accept_rpl
4033 * TCB picks up the correct value. If this was 0
4034 * TP will ignore any value > 0 for MSS index.
4035 */
4036 req->tcb.opt0 = cpu_to_be64(MSS_IDX_V(0xF));
4037 req->cookie = (uintptr_t)skb;
4038
4039 set_wr_txq(req_skb, CPL_PRIORITY_CONTROL, port_id);
4040 ret = cxgb4_ofld_send(dev->rdev.lldi.ports[0], req_skb);
4041 if (ret < 0) {
4042 pr_err("%s - cxgb4_ofld_send error %d - dropping\n", __func__,
4043 ret);
4044 kfree_skb(skb);
4045 kfree_skb(req_skb);
4046 }
4047}
4048
4049/*
4050 * Handler for CPL_RX_PKT message. Need to handle cpl_rx_pkt
4051 * messages when a filter is being used instead of server to
4052 * redirect a syn packet. When packets hit filter they are redirected
4053 * to the offload queue and driver tries to establish the connection
4054 * using firmware work request.
4055 */
4056static int rx_pkt(struct c4iw_dev *dev, struct sk_buff *skb)
4057{
4058 int stid;
4059 unsigned int filter;
4060 struct ethhdr *eh = NULL;
4061 struct vlan_ethhdr *vlan_eh = NULL;
4062 struct iphdr *iph;
4063 struct tcphdr *tcph;
4064 struct rss_header *rss = (void *)skb->data;
4065 struct cpl_rx_pkt *cpl = (void *)skb->data;
4066 struct cpl_pass_accept_req *req = (void *)(rss + 1);
4067 struct l2t_entry *e;
4068 struct dst_entry *dst;
4069 struct c4iw_ep *lep = NULL;
4070 u16 window;
4071 struct port_info *pi;
4072 struct net_device *pdev;
4073 u16 rss_qid, eth_hdr_len;
4074 int step;
4075 struct neighbour *neigh;
4076
4077 /* Drop all non-SYN packets */
4078 if (!(cpl->l2info & cpu_to_be32(RXF_SYN_F)))
4079 goto reject;
4080
4081 /*
4082 * Drop all packets which did not hit the filter.
4083 * Unlikely to happen.
4084 */
4085 if (!(rss->filter_hit && rss->filter_tid))
4086 goto reject;
4087
4088 /*
4089 * Calculate the server tid from filter hit index from cpl_rx_pkt.
4090 */
4091 stid = (__force int) cpu_to_be32((__force u32) rss->hash_val);
4092
4093 lep = (struct c4iw_ep *)get_ep_from_stid(dev, stid);
4094 if (!lep) {
4095 pr_warn("%s connect request on invalid stid %d\n",
4096 __func__, stid);
4097 goto reject;
4098 }
4099
4100 switch (CHELSIO_CHIP_VERSION(dev->rdev.lldi.adapter_type)) {
4101 case CHELSIO_T4:
4102 eth_hdr_len = RX_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info));
4103 break;
4104 case CHELSIO_T5:
4105 eth_hdr_len = RX_T5_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info));
4106 break;
4107 case CHELSIO_T6:
4108 eth_hdr_len = RX_T6_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info));
4109 break;
4110 default:
4111 pr_err("T%d Chip is not supported\n",
4112 CHELSIO_CHIP_VERSION(dev->rdev.lldi.adapter_type));
4113 goto reject;
4114 }
4115
4116 if (eth_hdr_len == ETH_HLEN) {
4117 eh = (struct ethhdr *)(req + 1);
4118 iph = (struct iphdr *)(eh + 1);
4119 } else {
4120 vlan_eh = (struct vlan_ethhdr *)(req + 1);
4121 iph = (struct iphdr *)(vlan_eh + 1);
4122 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), ntohs(cpl->vlan));
4123 }
4124
4125 if (iph->version != 0x4)
4126 goto reject;
4127
4128 tcph = (struct tcphdr *)(iph + 1);
4129 skb_set_network_header(skb, (void *)iph - (void *)rss);
4130 skb_set_transport_header(skb, (void *)tcph - (void *)rss);
4131 skb_get(skb);
4132
4133 pr_debug("lip 0x%x lport %u pip 0x%x pport %u tos %d\n",
4134 ntohl(iph->daddr), ntohs(tcph->dest), ntohl(iph->saddr),
4135 ntohs(tcph->source), iph->tos);
4136
4137 dst = cxgb_find_route(&dev->rdev.lldi, get_real_dev,
4138 iph->daddr, iph->saddr, tcph->dest,
4139 tcph->source, iph->tos);
4140 if (!dst) {
4141 pr_err("%s - failed to find dst entry!\n", __func__);
4142 goto reject;
4143 }
4144 neigh = dst_neigh_lookup_skb(dst, skb);
4145
4146 if (!neigh) {
4147 pr_err("%s - failed to allocate neigh!\n", __func__);
4148 goto free_dst;
4149 }
4150
4151 if (neigh->dev->flags & IFF_LOOPBACK) {
4152 pdev = ip_dev_find(&init_net, iph->daddr);
4153 if (!pdev) {
4154 pr_err("%s - failed to find device!\n", __func__);
4155 goto free_dst;
4156 }
4157 e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
4158 pdev, 0);
4159 pi = (struct port_info *)netdev_priv(pdev);
4160 dev_put(pdev);
4161 } else {
4162 pdev = get_real_dev(neigh->dev);
4163 e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
4164 pdev, 0);
4165 pi = (struct port_info *)netdev_priv(pdev);
4166 }
4167 neigh_release(neigh);
4168 if (!e) {
4169 pr_err("%s - failed to allocate l2t entry!\n",
4170 __func__);
4171 goto free_dst;
4172 }
4173
4174 step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan;
4175 rss_qid = dev->rdev.lldi.rxq_ids[pi->port_id * step];
4176 window = (__force u16) htons((__force u16)tcph->window);
4177
4178 /* Calcuate filter portion for LE region. */
4179 filter = (__force unsigned int) cpu_to_be32(cxgb4_select_ntuple(
4180 dev->rdev.lldi.ports[0],
4181 e));
4182
4183 /*
4184 * Synthesize the cpl_pass_accept_req. We have everything except the
4185 * TID. Once firmware sends a reply with TID we update the TID field
4186 * in cpl and pass it through the regular cpl_pass_accept_req path.
4187 */
4188 build_cpl_pass_accept_req(skb, stid, iph->tos);
4189 send_fw_pass_open_req(dev, skb, iph->daddr, tcph->dest, iph->saddr,
4190 tcph->source, ntohl(tcph->seq), filter, window,
4191 rss_qid, pi->port_id);
4192 cxgb4_l2t_release(e);
4193free_dst:
4194 dst_release(dst);
4195reject:
4196 if (lep)
4197 c4iw_put_ep(&lep->com);
4198 return 0;
4199}
4200
4201/*
4202 * These are the real handlers that are called from a
4203 * work queue.
4204 */
4205static c4iw_handler_func work_handlers[NUM_CPL_CMDS + NUM_FAKE_CPLS] = {
4206 [CPL_ACT_ESTABLISH] = act_establish,
4207 [CPL_ACT_OPEN_RPL] = act_open_rpl,
4208 [CPL_RX_DATA] = rx_data,
4209 [CPL_ABORT_RPL_RSS] = abort_rpl,
4210 [CPL_ABORT_RPL] = abort_rpl,
4211 [CPL_PASS_OPEN_RPL] = pass_open_rpl,
4212 [CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl,
4213 [CPL_PASS_ACCEPT_REQ] = pass_accept_req,
4214 [CPL_PASS_ESTABLISH] = pass_establish,
4215 [CPL_PEER_CLOSE] = peer_close,
4216 [CPL_ABORT_REQ_RSS] = peer_abort,
4217 [CPL_CLOSE_CON_RPL] = close_con_rpl,
4218 [CPL_RDMA_TERMINATE] = terminate,
4219 [CPL_FW4_ACK] = fw4_ack,
4220 [CPL_GET_TCB_RPL] = read_tcb_rpl,
4221 [CPL_FW6_MSG] = deferred_fw6_msg,
4222 [CPL_RX_PKT] = rx_pkt,
4223 [FAKE_CPL_PUT_EP_SAFE] = _put_ep_safe,
4224 [FAKE_CPL_PASS_PUT_EP_SAFE] = _put_pass_ep_safe
4225};
4226
4227static void process_timeout(struct c4iw_ep *ep)
4228{
4229 struct c4iw_qp_attributes attrs;
4230 int abort = 1;
4231
4232 mutex_lock(&ep->com.mutex);
4233 pr_debug("ep %p tid %u state %d\n", ep, ep->hwtid, ep->com.state);
4234 set_bit(TIMEDOUT, &ep->com.history);
4235 switch (ep->com.state) {
4236 case MPA_REQ_SENT:
4237 connect_reply_upcall(ep, -ETIMEDOUT);
4238 break;
4239 case MPA_REQ_WAIT:
4240 case MPA_REQ_RCVD:
4241 case MPA_REP_SENT:
4242 case FPDU_MODE:
4243 break;
4244 case CLOSING:
4245 case MORIBUND:
4246 if (ep->com.cm_id && ep->com.qp) {
4247 attrs.next_state = C4IW_QP_STATE_ERROR;
4248 c4iw_modify_qp(ep->com.qp->rhp,
4249 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
4250 &attrs, 1);
4251 }
4252 close_complete_upcall(ep, -ETIMEDOUT);
4253 break;
4254 case ABORTING:
4255 case DEAD:
4256
4257 /*
4258 * These states are expected if the ep timed out at the same
4259 * time as another thread was calling stop_ep_timer().
4260 * So we silently do nothing for these states.
4261 */
4262 abort = 0;
4263 break;
4264 default:
4265 WARN(1, "%s unexpected state ep %p tid %u state %u\n",
4266 __func__, ep, ep->hwtid, ep->com.state);
4267 abort = 0;
4268 }
4269 mutex_unlock(&ep->com.mutex);
4270 if (abort)
4271 c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
4272 c4iw_put_ep(&ep->com);
4273}
4274
4275static void process_timedout_eps(void)
4276{
4277 struct c4iw_ep *ep;
4278
4279 spin_lock_irq(&timeout_lock);
4280 while (!list_empty(&timeout_list)) {
4281 struct list_head *tmp;
4282
4283 tmp = timeout_list.next;
4284 list_del(tmp);
4285 tmp->next = NULL;
4286 tmp->prev = NULL;
4287 spin_unlock_irq(&timeout_lock);
4288 ep = list_entry(tmp, struct c4iw_ep, entry);
4289 process_timeout(ep);
4290 spin_lock_irq(&timeout_lock);
4291 }
4292 spin_unlock_irq(&timeout_lock);
4293}
4294
4295static void process_work(struct work_struct *work)
4296{
4297 struct sk_buff *skb = NULL;
4298 struct c4iw_dev *dev;
4299 struct cpl_act_establish *rpl;
4300 unsigned int opcode;
4301 int ret;
4302
4303 process_timedout_eps();
4304 while ((skb = skb_dequeue(&rxq))) {
4305 rpl = cplhdr(skb);
4306 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
4307 opcode = rpl->ot.opcode;
4308
4309 if (opcode >= ARRAY_SIZE(work_handlers) ||
4310 !work_handlers[opcode]) {
4311 pr_err("No handler for opcode 0x%x.\n", opcode);
4312 kfree_skb(skb);
4313 } else {
4314 ret = work_handlers[opcode](dev, skb);
4315 if (!ret)
4316 kfree_skb(skb);
4317 }
4318 process_timedout_eps();
4319 }
4320}
4321
4322static DECLARE_WORK(skb_work, process_work);
4323
4324static void ep_timeout(struct timer_list *t)
4325{
4326 struct c4iw_ep *ep = from_timer(ep, t, timer);
4327 int kickit = 0;
4328
4329 spin_lock(&timeout_lock);
4330 if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
4331 /*
4332 * Only insert if it is not already on the list.
4333 */
4334 if (!ep->entry.next) {
4335 list_add_tail(&ep->entry, &timeout_list);
4336 kickit = 1;
4337 }
4338 }
4339 spin_unlock(&timeout_lock);
4340 if (kickit)
4341 queue_work(workq, &skb_work);
4342}
4343
4344/*
4345 * All the CM events are handled on a work queue to have a safe context.
4346 */
4347static int sched(struct c4iw_dev *dev, struct sk_buff *skb)
4348{
4349
4350 /*
4351 * Save dev in the skb->cb area.
4352 */
4353 *((struct c4iw_dev **) (skb->cb + sizeof(void *))) = dev;
4354
4355 /*
4356 * Queue the skb and schedule the worker thread.
4357 */
4358 skb_queue_tail(&rxq, skb);
4359 queue_work(workq, &skb_work);
4360 return 0;
4361}
4362
4363static int set_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
4364{
4365 struct cpl_set_tcb_rpl *rpl = cplhdr(skb);
4366
4367 if (rpl->status != CPL_ERR_NONE) {
4368 pr_err("Unexpected SET_TCB_RPL status %u for tid %u\n",
4369 rpl->status, GET_TID(rpl));
4370 }
4371 kfree_skb(skb);
4372 return 0;
4373}
4374
4375static int fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
4376{
4377 struct cpl_fw6_msg *rpl = cplhdr(skb);
4378 struct c4iw_wr_wait *wr_waitp;
4379 int ret;
4380
4381 pr_debug("type %u\n", rpl->type);
4382
4383 switch (rpl->type) {
4384 case FW6_TYPE_WR_RPL:
4385 ret = (int)((be64_to_cpu(rpl->data[0]) >> 8) & 0xff);
4386 wr_waitp = (struct c4iw_wr_wait *)(__force unsigned long) rpl->data[1];
4387 pr_debug("wr_waitp %p ret %u\n", wr_waitp, ret);
4388 if (wr_waitp)
4389 c4iw_wake_up_deref(wr_waitp, ret ? -ret : 0);
4390 kfree_skb(skb);
4391 break;
4392 case FW6_TYPE_CQE:
4393 case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
4394 sched(dev, skb);
4395 break;
4396 default:
4397 pr_err("%s unexpected fw6 msg type %u\n",
4398 __func__, rpl->type);
4399 kfree_skb(skb);
4400 break;
4401 }
4402 return 0;
4403}
4404
4405static int peer_abort_intr(struct c4iw_dev *dev, struct sk_buff *skb)
4406{
4407 struct cpl_abort_req_rss *req = cplhdr(skb);
4408 struct c4iw_ep *ep;
4409 unsigned int tid = GET_TID(req);
4410
4411 ep = get_ep_from_tid(dev, tid);
4412 /* This EP will be dereferenced in peer_abort() */
4413 if (!ep) {
4414 pr_warn("Abort on non-existent endpoint, tid %d\n", tid);
4415 kfree_skb(skb);
4416 return 0;
4417 }
4418 if (cxgb_is_neg_adv(req->status)) {
4419 pr_debug("Negative advice on abort- tid %u status %d (%s)\n",
4420 ep->hwtid, req->status,
4421 neg_adv_str(req->status));
4422 goto out;
4423 }
4424 pr_debug("ep %p tid %u state %u\n", ep, ep->hwtid, ep->com.state);
4425
4426 c4iw_wake_up_noref(ep->com.wr_waitp, -ECONNRESET);
4427out:
4428 sched(dev, skb);
4429 return 0;
4430}
4431
4432/*
4433 * Most upcalls from the T4 Core go to sched() to
4434 * schedule the processing on a work queue.
4435 */
4436c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS] = {
4437 [CPL_ACT_ESTABLISH] = sched,
4438 [CPL_ACT_OPEN_RPL] = sched,
4439 [CPL_RX_DATA] = sched,
4440 [CPL_ABORT_RPL_RSS] = sched,
4441 [CPL_ABORT_RPL] = sched,
4442 [CPL_PASS_OPEN_RPL] = sched,
4443 [CPL_CLOSE_LISTSRV_RPL] = sched,
4444 [CPL_PASS_ACCEPT_REQ] = sched,
4445 [CPL_PASS_ESTABLISH] = sched,
4446 [CPL_PEER_CLOSE] = sched,
4447 [CPL_CLOSE_CON_RPL] = sched,
4448 [CPL_ABORT_REQ_RSS] = peer_abort_intr,
4449 [CPL_RDMA_TERMINATE] = sched,
4450 [CPL_FW4_ACK] = sched,
4451 [CPL_SET_TCB_RPL] = set_tcb_rpl,
4452 [CPL_GET_TCB_RPL] = sched,
4453 [CPL_FW6_MSG] = fw6_msg,
4454 [CPL_RX_PKT] = sched
4455};
4456
4457int __init c4iw_cm_init(void)
4458{
4459 skb_queue_head_init(&rxq);
4460
4461 workq = alloc_ordered_workqueue("iw_cxgb4", WQ_MEM_RECLAIM);
4462 if (!workq)
4463 return -ENOMEM;
4464
4465 return 0;
4466}
4467
4468void c4iw_cm_term(void)
4469{
4470 WARN_ON(!list_empty(&timeout_list));
4471 destroy_workqueue(workq);
4472}
1/*
2 * Copyright (c) 2009-2010 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 "iw_cxgb4.h"
51
52static char *states[] = {
53 "idle",
54 "listen",
55 "connecting",
56 "mpa_wait_req",
57 "mpa_req_sent",
58 "mpa_req_rcvd",
59 "mpa_rep_sent",
60 "fpdu_mode",
61 "aborting",
62 "closing",
63 "moribund",
64 "dead",
65 NULL,
66};
67
68static int nocong;
69module_param(nocong, int, 0644);
70MODULE_PARM_DESC(nocong, "Turn of congestion control (default=0)");
71
72static int enable_ecn;
73module_param(enable_ecn, int, 0644);
74MODULE_PARM_DESC(enable_ecn, "Enable ECN (default=0/disabled)");
75
76static int dack_mode = 1;
77module_param(dack_mode, int, 0644);
78MODULE_PARM_DESC(dack_mode, "Delayed ack mode (default=1)");
79
80int c4iw_max_read_depth = 8;
81module_param(c4iw_max_read_depth, int, 0644);
82MODULE_PARM_DESC(c4iw_max_read_depth, "Per-connection max ORD/IRD (default=8)");
83
84static int enable_tcp_timestamps;
85module_param(enable_tcp_timestamps, int, 0644);
86MODULE_PARM_DESC(enable_tcp_timestamps, "Enable tcp timestamps (default=0)");
87
88static int enable_tcp_sack;
89module_param(enable_tcp_sack, int, 0644);
90MODULE_PARM_DESC(enable_tcp_sack, "Enable tcp SACK (default=0)");
91
92static int enable_tcp_window_scaling = 1;
93module_param(enable_tcp_window_scaling, int, 0644);
94MODULE_PARM_DESC(enable_tcp_window_scaling,
95 "Enable tcp window scaling (default=1)");
96
97int c4iw_debug;
98module_param(c4iw_debug, int, 0644);
99MODULE_PARM_DESC(c4iw_debug, "Enable debug logging (default=0)");
100
101static int peer2peer = 1;
102module_param(peer2peer, int, 0644);
103MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=1)");
104
105static int p2p_type = FW_RI_INIT_P2PTYPE_READ_REQ;
106module_param(p2p_type, int, 0644);
107MODULE_PARM_DESC(p2p_type, "RDMAP opcode to use for the RTR message: "
108 "1=RDMA_READ 0=RDMA_WRITE (default 1)");
109
110static int ep_timeout_secs = 60;
111module_param(ep_timeout_secs, int, 0644);
112MODULE_PARM_DESC(ep_timeout_secs, "CM Endpoint operation timeout "
113 "in seconds (default=60)");
114
115static int mpa_rev = 1;
116module_param(mpa_rev, int, 0644);
117MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, "
118 "1 is RFC0544 spec compliant, 2 is IETF MPA Peer Connect Draft"
119 " compliant (default=1)");
120
121static int markers_enabled;
122module_param(markers_enabled, int, 0644);
123MODULE_PARM_DESC(markers_enabled, "Enable MPA MARKERS (default(0)=disabled)");
124
125static int crc_enabled = 1;
126module_param(crc_enabled, int, 0644);
127MODULE_PARM_DESC(crc_enabled, "Enable MPA CRC (default(1)=enabled)");
128
129static int rcv_win = 256 * 1024;
130module_param(rcv_win, int, 0644);
131MODULE_PARM_DESC(rcv_win, "TCP receive window in bytes (default=256KB)");
132
133static int snd_win = 128 * 1024;
134module_param(snd_win, int, 0644);
135MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=128KB)");
136
137static struct workqueue_struct *workq;
138
139static struct sk_buff_head rxq;
140
141static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp);
142static void ep_timeout(unsigned long arg);
143static void connect_reply_upcall(struct c4iw_ep *ep, int status);
144
145static LIST_HEAD(timeout_list);
146static spinlock_t timeout_lock;
147
148static void deref_qp(struct c4iw_ep *ep)
149{
150 c4iw_qp_rem_ref(&ep->com.qp->ibqp);
151 clear_bit(QP_REFERENCED, &ep->com.flags);
152}
153
154static void ref_qp(struct c4iw_ep *ep)
155{
156 set_bit(QP_REFERENCED, &ep->com.flags);
157 c4iw_qp_add_ref(&ep->com.qp->ibqp);
158}
159
160static void start_ep_timer(struct c4iw_ep *ep)
161{
162 PDBG("%s ep %p\n", __func__, ep);
163 if (timer_pending(&ep->timer)) {
164 pr_err("%s timer already started! ep %p\n",
165 __func__, ep);
166 return;
167 }
168 clear_bit(TIMEOUT, &ep->com.flags);
169 c4iw_get_ep(&ep->com);
170 ep->timer.expires = jiffies + ep_timeout_secs * HZ;
171 ep->timer.data = (unsigned long)ep;
172 ep->timer.function = ep_timeout;
173 add_timer(&ep->timer);
174}
175
176static int stop_ep_timer(struct c4iw_ep *ep)
177{
178 PDBG("%s ep %p stopping\n", __func__, ep);
179 del_timer_sync(&ep->timer);
180 if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
181 c4iw_put_ep(&ep->com);
182 return 0;
183 }
184 return 1;
185}
186
187static int c4iw_l2t_send(struct c4iw_rdev *rdev, struct sk_buff *skb,
188 struct l2t_entry *l2e)
189{
190 int error = 0;
191
192 if (c4iw_fatal_error(rdev)) {
193 kfree_skb(skb);
194 PDBG("%s - device in error state - dropping\n", __func__);
195 return -EIO;
196 }
197 error = cxgb4_l2t_send(rdev->lldi.ports[0], skb, l2e);
198 if (error < 0)
199 kfree_skb(skb);
200 return error < 0 ? error : 0;
201}
202
203int c4iw_ofld_send(struct c4iw_rdev *rdev, struct sk_buff *skb)
204{
205 int error = 0;
206
207 if (c4iw_fatal_error(rdev)) {
208 kfree_skb(skb);
209 PDBG("%s - device in error state - dropping\n", __func__);
210 return -EIO;
211 }
212 error = cxgb4_ofld_send(rdev->lldi.ports[0], skb);
213 if (error < 0)
214 kfree_skb(skb);
215 return error < 0 ? error : 0;
216}
217
218static void release_tid(struct c4iw_rdev *rdev, u32 hwtid, struct sk_buff *skb)
219{
220 struct cpl_tid_release *req;
221
222 skb = get_skb(skb, sizeof *req, GFP_KERNEL);
223 if (!skb)
224 return;
225 req = (struct cpl_tid_release *) skb_put(skb, sizeof(*req));
226 INIT_TP_WR(req, hwtid);
227 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_TID_RELEASE, hwtid));
228 set_wr_txq(skb, CPL_PRIORITY_SETUP, 0);
229 c4iw_ofld_send(rdev, skb);
230 return;
231}
232
233static void set_emss(struct c4iw_ep *ep, u16 opt)
234{
235 ep->emss = ep->com.dev->rdev.lldi.mtus[GET_TCPOPT_MSS(opt)] - 40;
236 ep->mss = ep->emss;
237 if (GET_TCPOPT_TSTAMP(opt))
238 ep->emss -= 12;
239 if (ep->emss < 128)
240 ep->emss = 128;
241 PDBG("%s mss_idx %u mss %u emss=%u\n", __func__, GET_TCPOPT_MSS(opt),
242 ep->mss, ep->emss);
243}
244
245static enum c4iw_ep_state state_read(struct c4iw_ep_common *epc)
246{
247 enum c4iw_ep_state state;
248
249 mutex_lock(&epc->mutex);
250 state = epc->state;
251 mutex_unlock(&epc->mutex);
252 return state;
253}
254
255static void __state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
256{
257 epc->state = new;
258}
259
260static void state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
261{
262 mutex_lock(&epc->mutex);
263 PDBG("%s - %s -> %s\n", __func__, states[epc->state], states[new]);
264 __state_set(epc, new);
265 mutex_unlock(&epc->mutex);
266 return;
267}
268
269static void *alloc_ep(int size, gfp_t gfp)
270{
271 struct c4iw_ep_common *epc;
272
273 epc = kzalloc(size, gfp);
274 if (epc) {
275 kref_init(&epc->kref);
276 mutex_init(&epc->mutex);
277 c4iw_init_wr_wait(&epc->wr_wait);
278 }
279 PDBG("%s alloc ep %p\n", __func__, epc);
280 return epc;
281}
282
283void _c4iw_free_ep(struct kref *kref)
284{
285 struct c4iw_ep *ep;
286
287 ep = container_of(kref, struct c4iw_ep, com.kref);
288 PDBG("%s ep %p state %s\n", __func__, ep, states[state_read(&ep->com)]);
289 if (test_bit(QP_REFERENCED, &ep->com.flags))
290 deref_qp(ep);
291 if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) {
292 remove_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep->hwtid);
293 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
294 dst_release(ep->dst);
295 cxgb4_l2t_release(ep->l2t);
296 }
297 kfree(ep);
298}
299
300static void release_ep_resources(struct c4iw_ep *ep)
301{
302 set_bit(RELEASE_RESOURCES, &ep->com.flags);
303 c4iw_put_ep(&ep->com);
304}
305
306static int status2errno(int status)
307{
308 switch (status) {
309 case CPL_ERR_NONE:
310 return 0;
311 case CPL_ERR_CONN_RESET:
312 return -ECONNRESET;
313 case CPL_ERR_ARP_MISS:
314 return -EHOSTUNREACH;
315 case CPL_ERR_CONN_TIMEDOUT:
316 return -ETIMEDOUT;
317 case CPL_ERR_TCAM_FULL:
318 return -ENOMEM;
319 case CPL_ERR_CONN_EXIST:
320 return -EADDRINUSE;
321 default:
322 return -EIO;
323 }
324}
325
326/*
327 * Try and reuse skbs already allocated...
328 */
329static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp)
330{
331 if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) {
332 skb_trim(skb, 0);
333 skb_get(skb);
334 skb_reset_transport_header(skb);
335 } else {
336 skb = alloc_skb(len, gfp);
337 }
338 t4_set_arp_err_handler(skb, NULL, NULL);
339 return skb;
340}
341
342static struct net_device *get_real_dev(struct net_device *egress_dev)
343{
344 struct net_device *phys_dev = egress_dev;
345 if (egress_dev->priv_flags & IFF_802_1Q_VLAN)
346 phys_dev = vlan_dev_real_dev(egress_dev);
347 return phys_dev;
348}
349
350static int our_interface(struct c4iw_dev *dev, struct net_device *egress_dev)
351{
352 int i;
353
354 egress_dev = get_real_dev(egress_dev);
355 for (i = 0; i < dev->rdev.lldi.nports; i++)
356 if (dev->rdev.lldi.ports[i] == egress_dev)
357 return 1;
358 return 0;
359}
360
361static struct dst_entry *find_route6(struct c4iw_dev *dev, __u8 *local_ip,
362 __u8 *peer_ip, __be16 local_port,
363 __be16 peer_port, u8 tos,
364 __u32 sin6_scope_id)
365{
366 struct dst_entry *dst = NULL;
367
368 if (IS_ENABLED(CONFIG_IPV6)) {
369 struct flowi6 fl6;
370
371 memset(&fl6, 0, sizeof(fl6));
372 memcpy(&fl6.daddr, peer_ip, 16);
373 memcpy(&fl6.saddr, local_ip, 16);
374 if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
375 fl6.flowi6_oif = sin6_scope_id;
376 dst = ip6_route_output(&init_net, NULL, &fl6);
377 if (!dst)
378 goto out;
379 if (!our_interface(dev, ip6_dst_idev(dst)->dev) &&
380 !(ip6_dst_idev(dst)->dev->flags & IFF_LOOPBACK)) {
381 dst_release(dst);
382 dst = NULL;
383 }
384 }
385
386out:
387 return dst;
388}
389
390static struct dst_entry *find_route(struct c4iw_dev *dev, __be32 local_ip,
391 __be32 peer_ip, __be16 local_port,
392 __be16 peer_port, u8 tos)
393{
394 struct rtable *rt;
395 struct flowi4 fl4;
396 struct neighbour *n;
397
398 rt = ip_route_output_ports(&init_net, &fl4, NULL, peer_ip, local_ip,
399 peer_port, local_port, IPPROTO_TCP,
400 tos, 0);
401 if (IS_ERR(rt))
402 return NULL;
403 n = dst_neigh_lookup(&rt->dst, &peer_ip);
404 if (!n)
405 return NULL;
406 if (!our_interface(dev, n->dev) &&
407 !(n->dev->flags & IFF_LOOPBACK)) {
408 dst_release(&rt->dst);
409 return NULL;
410 }
411 neigh_release(n);
412 return &rt->dst;
413}
414
415static void arp_failure_discard(void *handle, struct sk_buff *skb)
416{
417 PDBG("%s c4iw_dev %p\n", __func__, handle);
418 kfree_skb(skb);
419}
420
421/*
422 * Handle an ARP failure for an active open.
423 */
424static void act_open_req_arp_failure(void *handle, struct sk_buff *skb)
425{
426 printk(KERN_ERR MOD "ARP failure duing connect\n");
427 kfree_skb(skb);
428}
429
430/*
431 * Handle an ARP failure for a CPL_ABORT_REQ. Change it into a no RST variant
432 * and send it along.
433 */
434static void abort_arp_failure(void *handle, struct sk_buff *skb)
435{
436 struct c4iw_rdev *rdev = handle;
437 struct cpl_abort_req *req = cplhdr(skb);
438
439 PDBG("%s rdev %p\n", __func__, rdev);
440 req->cmd = CPL_ABORT_NO_RST;
441 c4iw_ofld_send(rdev, skb);
442}
443
444static void send_flowc(struct c4iw_ep *ep, struct sk_buff *skb)
445{
446 unsigned int flowclen = 80;
447 struct fw_flowc_wr *flowc;
448 int i;
449
450 skb = get_skb(skb, flowclen, GFP_KERNEL);
451 flowc = (struct fw_flowc_wr *)__skb_put(skb, flowclen);
452
453 flowc->op_to_nparams = cpu_to_be32(FW_WR_OP(FW_FLOWC_WR) |
454 FW_FLOWC_WR_NPARAMS(8));
455 flowc->flowid_len16 = cpu_to_be32(FW_WR_LEN16(DIV_ROUND_UP(flowclen,
456 16)) | FW_WR_FLOWID(ep->hwtid));
457
458 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
459 flowc->mnemval[0].val = cpu_to_be32(PCI_FUNC(ep->com.dev->rdev.lldi.pdev->devfn) << 8);
460 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
461 flowc->mnemval[1].val = cpu_to_be32(ep->tx_chan);
462 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
463 flowc->mnemval[2].val = cpu_to_be32(ep->tx_chan);
464 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
465 flowc->mnemval[3].val = cpu_to_be32(ep->rss_qid);
466 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
467 flowc->mnemval[4].val = cpu_to_be32(ep->snd_seq);
468 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
469 flowc->mnemval[5].val = cpu_to_be32(ep->rcv_seq);
470 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
471 flowc->mnemval[6].val = cpu_to_be32(snd_win);
472 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
473 flowc->mnemval[7].val = cpu_to_be32(ep->emss);
474 /* Pad WR to 16 byte boundary */
475 flowc->mnemval[8].mnemonic = 0;
476 flowc->mnemval[8].val = 0;
477 for (i = 0; i < 9; i++) {
478 flowc->mnemval[i].r4[0] = 0;
479 flowc->mnemval[i].r4[1] = 0;
480 flowc->mnemval[i].r4[2] = 0;
481 }
482
483 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
484 c4iw_ofld_send(&ep->com.dev->rdev, skb);
485}
486
487static int send_halfclose(struct c4iw_ep *ep, gfp_t gfp)
488{
489 struct cpl_close_con_req *req;
490 struct sk_buff *skb;
491 int wrlen = roundup(sizeof *req, 16);
492
493 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
494 skb = get_skb(NULL, wrlen, gfp);
495 if (!skb) {
496 printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
497 return -ENOMEM;
498 }
499 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
500 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
501 req = (struct cpl_close_con_req *) skb_put(skb, wrlen);
502 memset(req, 0, wrlen);
503 INIT_TP_WR(req, ep->hwtid);
504 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ,
505 ep->hwtid));
506 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
507}
508
509static int send_abort(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
510{
511 struct cpl_abort_req *req;
512 int wrlen = roundup(sizeof *req, 16);
513
514 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
515 skb = get_skb(skb, wrlen, gfp);
516 if (!skb) {
517 printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
518 __func__);
519 return -ENOMEM;
520 }
521 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
522 t4_set_arp_err_handler(skb, &ep->com.dev->rdev, abort_arp_failure);
523 req = (struct cpl_abort_req *) skb_put(skb, wrlen);
524 memset(req, 0, wrlen);
525 INIT_TP_WR(req, ep->hwtid);
526 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, ep->hwtid));
527 req->cmd = CPL_ABORT_SEND_RST;
528 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
529}
530
531static int send_connect(struct c4iw_ep *ep)
532{
533 struct cpl_act_open_req *req;
534 struct cpl_t5_act_open_req *t5_req;
535 struct cpl_act_open_req6 *req6;
536 struct cpl_t5_act_open_req6 *t5_req6;
537 struct sk_buff *skb;
538 u64 opt0;
539 u32 opt2;
540 unsigned int mtu_idx;
541 int wscale;
542 int wrlen;
543 int sizev4 = is_t4(ep->com.dev->rdev.lldi.adapter_type) ?
544 sizeof(struct cpl_act_open_req) :
545 sizeof(struct cpl_t5_act_open_req);
546 int sizev6 = is_t4(ep->com.dev->rdev.lldi.adapter_type) ?
547 sizeof(struct cpl_act_open_req6) :
548 sizeof(struct cpl_t5_act_open_req6);
549 struct sockaddr_in *la = (struct sockaddr_in *)&ep->com.local_addr;
550 struct sockaddr_in *ra = (struct sockaddr_in *)&ep->com.remote_addr;
551 struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)&ep->com.local_addr;
552 struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)&ep->com.remote_addr;
553
554 wrlen = (ep->com.remote_addr.ss_family == AF_INET) ?
555 roundup(sizev4, 16) :
556 roundup(sizev6, 16);
557
558 PDBG("%s ep %p atid %u\n", __func__, ep, ep->atid);
559
560 skb = get_skb(NULL, wrlen, GFP_KERNEL);
561 if (!skb) {
562 printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
563 __func__);
564 return -ENOMEM;
565 }
566 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
567
568 cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
569 wscale = compute_wscale(rcv_win);
570 opt0 = (nocong ? NO_CONG(1) : 0) |
571 KEEP_ALIVE(1) |
572 DELACK(1) |
573 WND_SCALE(wscale) |
574 MSS_IDX(mtu_idx) |
575 L2T_IDX(ep->l2t->idx) |
576 TX_CHAN(ep->tx_chan) |
577 SMAC_SEL(ep->smac_idx) |
578 DSCP(ep->tos) |
579 ULP_MODE(ULP_MODE_TCPDDP) |
580 RCV_BUFSIZ(rcv_win>>10);
581 opt2 = RX_CHANNEL(0) |
582 CCTRL_ECN(enable_ecn) |
583 RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid);
584 if (enable_tcp_timestamps)
585 opt2 |= TSTAMPS_EN(1);
586 if (enable_tcp_sack)
587 opt2 |= SACK_EN(1);
588 if (wscale && enable_tcp_window_scaling)
589 opt2 |= WND_SCALE_EN(1);
590 if (is_t5(ep->com.dev->rdev.lldi.adapter_type)) {
591 opt2 |= T5_OPT_2_VALID;
592 opt2 |= V_CONG_CNTRL(CONG_ALG_TAHOE);
593 }
594 t4_set_arp_err_handler(skb, NULL, act_open_req_arp_failure);
595
596 if (is_t4(ep->com.dev->rdev.lldi.adapter_type)) {
597 if (ep->com.remote_addr.ss_family == AF_INET) {
598 req = (struct cpl_act_open_req *) skb_put(skb, wrlen);
599 INIT_TP_WR(req, 0);
600 OPCODE_TID(req) = cpu_to_be32(
601 MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
602 ((ep->rss_qid << 14) | ep->atid)));
603 req->local_port = la->sin_port;
604 req->peer_port = ra->sin_port;
605 req->local_ip = la->sin_addr.s_addr;
606 req->peer_ip = ra->sin_addr.s_addr;
607 req->opt0 = cpu_to_be64(opt0);
608 req->params = cpu_to_be32(cxgb4_select_ntuple(
609 ep->com.dev->rdev.lldi.ports[0],
610 ep->l2t));
611 req->opt2 = cpu_to_be32(opt2);
612 } else {
613 req6 = (struct cpl_act_open_req6 *)skb_put(skb, wrlen);
614
615 INIT_TP_WR(req6, 0);
616 OPCODE_TID(req6) = cpu_to_be32(
617 MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
618 ((ep->rss_qid<<14)|ep->atid)));
619 req6->local_port = la6->sin6_port;
620 req6->peer_port = ra6->sin6_port;
621 req6->local_ip_hi = *((__be64 *)
622 (la6->sin6_addr.s6_addr));
623 req6->local_ip_lo = *((__be64 *)
624 (la6->sin6_addr.s6_addr + 8));
625 req6->peer_ip_hi = *((__be64 *)
626 (ra6->sin6_addr.s6_addr));
627 req6->peer_ip_lo = *((__be64 *)
628 (ra6->sin6_addr.s6_addr + 8));
629 req6->opt0 = cpu_to_be64(opt0);
630 req6->params = cpu_to_be32(cxgb4_select_ntuple(
631 ep->com.dev->rdev.lldi.ports[0],
632 ep->l2t));
633 req6->opt2 = cpu_to_be32(opt2);
634 }
635 } else {
636 if (ep->com.remote_addr.ss_family == AF_INET) {
637 t5_req = (struct cpl_t5_act_open_req *)
638 skb_put(skb, wrlen);
639 INIT_TP_WR(t5_req, 0);
640 OPCODE_TID(t5_req) = cpu_to_be32(
641 MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
642 ((ep->rss_qid << 14) | ep->atid)));
643 t5_req->local_port = la->sin_port;
644 t5_req->peer_port = ra->sin_port;
645 t5_req->local_ip = la->sin_addr.s_addr;
646 t5_req->peer_ip = ra->sin_addr.s_addr;
647 t5_req->opt0 = cpu_to_be64(opt0);
648 t5_req->params = cpu_to_be64(V_FILTER_TUPLE(
649 cxgb4_select_ntuple(
650 ep->com.dev->rdev.lldi.ports[0],
651 ep->l2t)));
652 t5_req->opt2 = cpu_to_be32(opt2);
653 } else {
654 t5_req6 = (struct cpl_t5_act_open_req6 *)
655 skb_put(skb, wrlen);
656 INIT_TP_WR(t5_req6, 0);
657 OPCODE_TID(t5_req6) = cpu_to_be32(
658 MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
659 ((ep->rss_qid<<14)|ep->atid)));
660 t5_req6->local_port = la6->sin6_port;
661 t5_req6->peer_port = ra6->sin6_port;
662 t5_req6->local_ip_hi = *((__be64 *)
663 (la6->sin6_addr.s6_addr));
664 t5_req6->local_ip_lo = *((__be64 *)
665 (la6->sin6_addr.s6_addr + 8));
666 t5_req6->peer_ip_hi = *((__be64 *)
667 (ra6->sin6_addr.s6_addr));
668 t5_req6->peer_ip_lo = *((__be64 *)
669 (ra6->sin6_addr.s6_addr + 8));
670 t5_req6->opt0 = cpu_to_be64(opt0);
671 t5_req6->params = (__force __be64)cpu_to_be32(
672 cxgb4_select_ntuple(
673 ep->com.dev->rdev.lldi.ports[0],
674 ep->l2t));
675 t5_req6->opt2 = cpu_to_be32(opt2);
676 }
677 }
678
679 set_bit(ACT_OPEN_REQ, &ep->com.history);
680 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
681}
682
683static void send_mpa_req(struct c4iw_ep *ep, struct sk_buff *skb,
684 u8 mpa_rev_to_use)
685{
686 int mpalen, wrlen;
687 struct fw_ofld_tx_data_wr *req;
688 struct mpa_message *mpa;
689 struct mpa_v2_conn_params mpa_v2_params;
690
691 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
692
693 BUG_ON(skb_cloned(skb));
694
695 mpalen = sizeof(*mpa) + ep->plen;
696 if (mpa_rev_to_use == 2)
697 mpalen += sizeof(struct mpa_v2_conn_params);
698 wrlen = roundup(mpalen + sizeof *req, 16);
699 skb = get_skb(skb, wrlen, GFP_KERNEL);
700 if (!skb) {
701 connect_reply_upcall(ep, -ENOMEM);
702 return;
703 }
704 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
705
706 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
707 memset(req, 0, wrlen);
708 req->op_to_immdlen = cpu_to_be32(
709 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
710 FW_WR_COMPL(1) |
711 FW_WR_IMMDLEN(mpalen));
712 req->flowid_len16 = cpu_to_be32(
713 FW_WR_FLOWID(ep->hwtid) |
714 FW_WR_LEN16(wrlen >> 4));
715 req->plen = cpu_to_be32(mpalen);
716 req->tunnel_to_proxy = cpu_to_be32(
717 FW_OFLD_TX_DATA_WR_FLUSH(1) |
718 FW_OFLD_TX_DATA_WR_SHOVE(1));
719
720 mpa = (struct mpa_message *)(req + 1);
721 memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
722 mpa->flags = (crc_enabled ? MPA_CRC : 0) |
723 (markers_enabled ? MPA_MARKERS : 0) |
724 (mpa_rev_to_use == 2 ? MPA_ENHANCED_RDMA_CONN : 0);
725 mpa->private_data_size = htons(ep->plen);
726 mpa->revision = mpa_rev_to_use;
727 if (mpa_rev_to_use == 1) {
728 ep->tried_with_mpa_v1 = 1;
729 ep->retry_with_mpa_v1 = 0;
730 }
731
732 if (mpa_rev_to_use == 2) {
733 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
734 sizeof (struct mpa_v2_conn_params));
735 mpa_v2_params.ird = htons((u16)ep->ird);
736 mpa_v2_params.ord = htons((u16)ep->ord);
737
738 if (peer2peer) {
739 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
740 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
741 mpa_v2_params.ord |=
742 htons(MPA_V2_RDMA_WRITE_RTR);
743 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
744 mpa_v2_params.ord |=
745 htons(MPA_V2_RDMA_READ_RTR);
746 }
747 memcpy(mpa->private_data, &mpa_v2_params,
748 sizeof(struct mpa_v2_conn_params));
749
750 if (ep->plen)
751 memcpy(mpa->private_data +
752 sizeof(struct mpa_v2_conn_params),
753 ep->mpa_pkt + sizeof(*mpa), ep->plen);
754 } else
755 if (ep->plen)
756 memcpy(mpa->private_data,
757 ep->mpa_pkt + sizeof(*mpa), ep->plen);
758
759 /*
760 * Reference the mpa skb. This ensures the data area
761 * will remain in memory until the hw acks the tx.
762 * Function fw4_ack() will deref it.
763 */
764 skb_get(skb);
765 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
766 BUG_ON(ep->mpa_skb);
767 ep->mpa_skb = skb;
768 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
769 start_ep_timer(ep);
770 __state_set(&ep->com, MPA_REQ_SENT);
771 ep->mpa_attr.initiator = 1;
772 ep->snd_seq += mpalen;
773 return;
774}
775
776static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen)
777{
778 int mpalen, wrlen;
779 struct fw_ofld_tx_data_wr *req;
780 struct mpa_message *mpa;
781 struct sk_buff *skb;
782 struct mpa_v2_conn_params mpa_v2_params;
783
784 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
785
786 mpalen = sizeof(*mpa) + plen;
787 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
788 mpalen += sizeof(struct mpa_v2_conn_params);
789 wrlen = roundup(mpalen + sizeof *req, 16);
790
791 skb = get_skb(NULL, wrlen, GFP_KERNEL);
792 if (!skb) {
793 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
794 return -ENOMEM;
795 }
796 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
797
798 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
799 memset(req, 0, wrlen);
800 req->op_to_immdlen = cpu_to_be32(
801 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
802 FW_WR_COMPL(1) |
803 FW_WR_IMMDLEN(mpalen));
804 req->flowid_len16 = cpu_to_be32(
805 FW_WR_FLOWID(ep->hwtid) |
806 FW_WR_LEN16(wrlen >> 4));
807 req->plen = cpu_to_be32(mpalen);
808 req->tunnel_to_proxy = cpu_to_be32(
809 FW_OFLD_TX_DATA_WR_FLUSH(1) |
810 FW_OFLD_TX_DATA_WR_SHOVE(1));
811
812 mpa = (struct mpa_message *)(req + 1);
813 memset(mpa, 0, sizeof(*mpa));
814 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
815 mpa->flags = MPA_REJECT;
816 mpa->revision = ep->mpa_attr.version;
817 mpa->private_data_size = htons(plen);
818
819 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
820 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
821 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
822 sizeof (struct mpa_v2_conn_params));
823 mpa_v2_params.ird = htons(((u16)ep->ird) |
824 (peer2peer ? MPA_V2_PEER2PEER_MODEL :
825 0));
826 mpa_v2_params.ord = htons(((u16)ep->ord) | (peer2peer ?
827 (p2p_type ==
828 FW_RI_INIT_P2PTYPE_RDMA_WRITE ?
829 MPA_V2_RDMA_WRITE_RTR : p2p_type ==
830 FW_RI_INIT_P2PTYPE_READ_REQ ?
831 MPA_V2_RDMA_READ_RTR : 0) : 0));
832 memcpy(mpa->private_data, &mpa_v2_params,
833 sizeof(struct mpa_v2_conn_params));
834
835 if (ep->plen)
836 memcpy(mpa->private_data +
837 sizeof(struct mpa_v2_conn_params), pdata, plen);
838 } else
839 if (plen)
840 memcpy(mpa->private_data, pdata, plen);
841
842 /*
843 * Reference the mpa skb again. This ensures the data area
844 * will remain in memory until the hw acks the tx.
845 * Function fw4_ack() will deref it.
846 */
847 skb_get(skb);
848 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
849 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
850 BUG_ON(ep->mpa_skb);
851 ep->mpa_skb = skb;
852 ep->snd_seq += mpalen;
853 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
854}
855
856static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen)
857{
858 int mpalen, wrlen;
859 struct fw_ofld_tx_data_wr *req;
860 struct mpa_message *mpa;
861 struct sk_buff *skb;
862 struct mpa_v2_conn_params mpa_v2_params;
863
864 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
865
866 mpalen = sizeof(*mpa) + plen;
867 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
868 mpalen += sizeof(struct mpa_v2_conn_params);
869 wrlen = roundup(mpalen + sizeof *req, 16);
870
871 skb = get_skb(NULL, wrlen, GFP_KERNEL);
872 if (!skb) {
873 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
874 return -ENOMEM;
875 }
876 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
877
878 req = (struct fw_ofld_tx_data_wr *) skb_put(skb, wrlen);
879 memset(req, 0, wrlen);
880 req->op_to_immdlen = cpu_to_be32(
881 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
882 FW_WR_COMPL(1) |
883 FW_WR_IMMDLEN(mpalen));
884 req->flowid_len16 = cpu_to_be32(
885 FW_WR_FLOWID(ep->hwtid) |
886 FW_WR_LEN16(wrlen >> 4));
887 req->plen = cpu_to_be32(mpalen);
888 req->tunnel_to_proxy = cpu_to_be32(
889 FW_OFLD_TX_DATA_WR_FLUSH(1) |
890 FW_OFLD_TX_DATA_WR_SHOVE(1));
891
892 mpa = (struct mpa_message *)(req + 1);
893 memset(mpa, 0, sizeof(*mpa));
894 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
895 mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) |
896 (markers_enabled ? MPA_MARKERS : 0);
897 mpa->revision = ep->mpa_attr.version;
898 mpa->private_data_size = htons(plen);
899
900 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
901 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
902 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
903 sizeof (struct mpa_v2_conn_params));
904 mpa_v2_params.ird = htons((u16)ep->ird);
905 mpa_v2_params.ord = htons((u16)ep->ord);
906 if (peer2peer && (ep->mpa_attr.p2p_type !=
907 FW_RI_INIT_P2PTYPE_DISABLED)) {
908 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
909
910 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
911 mpa_v2_params.ord |=
912 htons(MPA_V2_RDMA_WRITE_RTR);
913 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
914 mpa_v2_params.ord |=
915 htons(MPA_V2_RDMA_READ_RTR);
916 }
917
918 memcpy(mpa->private_data, &mpa_v2_params,
919 sizeof(struct mpa_v2_conn_params));
920
921 if (ep->plen)
922 memcpy(mpa->private_data +
923 sizeof(struct mpa_v2_conn_params), pdata, plen);
924 } else
925 if (plen)
926 memcpy(mpa->private_data, pdata, plen);
927
928 /*
929 * Reference the mpa skb. This ensures the data area
930 * will remain in memory until the hw acks the tx.
931 * Function fw4_ack() will deref it.
932 */
933 skb_get(skb);
934 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
935 ep->mpa_skb = skb;
936 __state_set(&ep->com, MPA_REP_SENT);
937 ep->snd_seq += mpalen;
938 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
939}
940
941static int act_establish(struct c4iw_dev *dev, struct sk_buff *skb)
942{
943 struct c4iw_ep *ep;
944 struct cpl_act_establish *req = cplhdr(skb);
945 unsigned int tid = GET_TID(req);
946 unsigned int atid = GET_TID_TID(ntohl(req->tos_atid));
947 struct tid_info *t = dev->rdev.lldi.tids;
948
949 ep = lookup_atid(t, atid);
950
951 PDBG("%s ep %p tid %u snd_isn %u rcv_isn %u\n", __func__, ep, tid,
952 be32_to_cpu(req->snd_isn), be32_to_cpu(req->rcv_isn));
953
954 mutex_lock(&ep->com.mutex);
955 dst_confirm(ep->dst);
956
957 /* setup the hwtid for this connection */
958 ep->hwtid = tid;
959 cxgb4_insert_tid(t, ep, tid);
960 insert_handle(dev, &dev->hwtid_idr, ep, ep->hwtid);
961
962 ep->snd_seq = be32_to_cpu(req->snd_isn);
963 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
964
965 set_emss(ep, ntohs(req->tcp_opt));
966
967 /* dealloc the atid */
968 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, atid);
969 cxgb4_free_atid(t, atid);
970 set_bit(ACT_ESTAB, &ep->com.history);
971
972 /* start MPA negotiation */
973 send_flowc(ep, NULL);
974 if (ep->retry_with_mpa_v1)
975 send_mpa_req(ep, skb, 1);
976 else
977 send_mpa_req(ep, skb, mpa_rev);
978 mutex_unlock(&ep->com.mutex);
979 return 0;
980}
981
982static void close_complete_upcall(struct c4iw_ep *ep, int status)
983{
984 struct iw_cm_event event;
985
986 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
987 memset(&event, 0, sizeof(event));
988 event.event = IW_CM_EVENT_CLOSE;
989 event.status = status;
990 if (ep->com.cm_id) {
991 PDBG("close complete delivered ep %p cm_id %p tid %u\n",
992 ep, ep->com.cm_id, ep->hwtid);
993 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
994 ep->com.cm_id->rem_ref(ep->com.cm_id);
995 ep->com.cm_id = NULL;
996 set_bit(CLOSE_UPCALL, &ep->com.history);
997 }
998}
999
1000static int abort_connection(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
1001{
1002 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1003 __state_set(&ep->com, ABORTING);
1004 set_bit(ABORT_CONN, &ep->com.history);
1005 return send_abort(ep, skb, gfp);
1006}
1007
1008static void peer_close_upcall(struct c4iw_ep *ep)
1009{
1010 struct iw_cm_event event;
1011
1012 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1013 memset(&event, 0, sizeof(event));
1014 event.event = IW_CM_EVENT_DISCONNECT;
1015 if (ep->com.cm_id) {
1016 PDBG("peer close delivered ep %p cm_id %p tid %u\n",
1017 ep, ep->com.cm_id, ep->hwtid);
1018 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1019 set_bit(DISCONN_UPCALL, &ep->com.history);
1020 }
1021}
1022
1023static void peer_abort_upcall(struct c4iw_ep *ep)
1024{
1025 struct iw_cm_event event;
1026
1027 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1028 memset(&event, 0, sizeof(event));
1029 event.event = IW_CM_EVENT_CLOSE;
1030 event.status = -ECONNRESET;
1031 if (ep->com.cm_id) {
1032 PDBG("abort delivered ep %p cm_id %p tid %u\n", ep,
1033 ep->com.cm_id, ep->hwtid);
1034 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1035 ep->com.cm_id->rem_ref(ep->com.cm_id);
1036 ep->com.cm_id = NULL;
1037 set_bit(ABORT_UPCALL, &ep->com.history);
1038 }
1039}
1040
1041static void connect_reply_upcall(struct c4iw_ep *ep, int status)
1042{
1043 struct iw_cm_event event;
1044
1045 PDBG("%s ep %p tid %u status %d\n", __func__, ep, ep->hwtid, status);
1046 memset(&event, 0, sizeof(event));
1047 event.event = IW_CM_EVENT_CONNECT_REPLY;
1048 event.status = status;
1049 memcpy(&event.local_addr, &ep->com.local_addr,
1050 sizeof(ep->com.local_addr));
1051 memcpy(&event.remote_addr, &ep->com.remote_addr,
1052 sizeof(ep->com.remote_addr));
1053
1054 if ((status == 0) || (status == -ECONNREFUSED)) {
1055 if (!ep->tried_with_mpa_v1) {
1056 /* this means MPA_v2 is used */
1057 event.private_data_len = ep->plen -
1058 sizeof(struct mpa_v2_conn_params);
1059 event.private_data = ep->mpa_pkt +
1060 sizeof(struct mpa_message) +
1061 sizeof(struct mpa_v2_conn_params);
1062 } else {
1063 /* this means MPA_v1 is used */
1064 event.private_data_len = ep->plen;
1065 event.private_data = ep->mpa_pkt +
1066 sizeof(struct mpa_message);
1067 }
1068 }
1069
1070 PDBG("%s ep %p tid %u status %d\n", __func__, ep,
1071 ep->hwtid, status);
1072 set_bit(CONN_RPL_UPCALL, &ep->com.history);
1073 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1074
1075 if (status < 0) {
1076 ep->com.cm_id->rem_ref(ep->com.cm_id);
1077 ep->com.cm_id = NULL;
1078 }
1079}
1080
1081static int connect_request_upcall(struct c4iw_ep *ep)
1082{
1083 struct iw_cm_event event;
1084 int ret;
1085
1086 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1087 memset(&event, 0, sizeof(event));
1088 event.event = IW_CM_EVENT_CONNECT_REQUEST;
1089 memcpy(&event.local_addr, &ep->com.local_addr,
1090 sizeof(ep->com.local_addr));
1091 memcpy(&event.remote_addr, &ep->com.remote_addr,
1092 sizeof(ep->com.remote_addr));
1093 event.provider_data = ep;
1094 if (!ep->tried_with_mpa_v1) {
1095 /* this means MPA_v2 is used */
1096 event.ord = ep->ord;
1097 event.ird = ep->ird;
1098 event.private_data_len = ep->plen -
1099 sizeof(struct mpa_v2_conn_params);
1100 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message) +
1101 sizeof(struct mpa_v2_conn_params);
1102 } else {
1103 /* this means MPA_v1 is used. Send max supported */
1104 event.ord = c4iw_max_read_depth;
1105 event.ird = c4iw_max_read_depth;
1106 event.private_data_len = ep->plen;
1107 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
1108 }
1109 c4iw_get_ep(&ep->com);
1110 ret = ep->parent_ep->com.cm_id->event_handler(ep->parent_ep->com.cm_id,
1111 &event);
1112 if (ret)
1113 c4iw_put_ep(&ep->com);
1114 set_bit(CONNREQ_UPCALL, &ep->com.history);
1115 c4iw_put_ep(&ep->parent_ep->com);
1116 return ret;
1117}
1118
1119static void established_upcall(struct c4iw_ep *ep)
1120{
1121 struct iw_cm_event event;
1122
1123 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1124 memset(&event, 0, sizeof(event));
1125 event.event = IW_CM_EVENT_ESTABLISHED;
1126 event.ird = ep->ird;
1127 event.ord = ep->ord;
1128 if (ep->com.cm_id) {
1129 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1130 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1131 set_bit(ESTAB_UPCALL, &ep->com.history);
1132 }
1133}
1134
1135static int update_rx_credits(struct c4iw_ep *ep, u32 credits)
1136{
1137 struct cpl_rx_data_ack *req;
1138 struct sk_buff *skb;
1139 int wrlen = roundup(sizeof *req, 16);
1140
1141 PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
1142 skb = get_skb(NULL, wrlen, GFP_KERNEL);
1143 if (!skb) {
1144 printk(KERN_ERR MOD "update_rx_credits - cannot alloc skb!\n");
1145 return 0;
1146 }
1147
1148 req = (struct cpl_rx_data_ack *) skb_put(skb, wrlen);
1149 memset(req, 0, wrlen);
1150 INIT_TP_WR(req, ep->hwtid);
1151 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
1152 ep->hwtid));
1153 req->credit_dack = cpu_to_be32(credits | RX_FORCE_ACK(1) |
1154 F_RX_DACK_CHANGE |
1155 V_RX_DACK_MODE(dack_mode));
1156 set_wr_txq(skb, CPL_PRIORITY_ACK, ep->ctrlq_idx);
1157 c4iw_ofld_send(&ep->com.dev->rdev, skb);
1158 return credits;
1159}
1160
1161static int process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
1162{
1163 struct mpa_message *mpa;
1164 struct mpa_v2_conn_params *mpa_v2_params;
1165 u16 plen;
1166 u16 resp_ird, resp_ord;
1167 u8 rtr_mismatch = 0, insuff_ird = 0;
1168 struct c4iw_qp_attributes attrs;
1169 enum c4iw_qp_attr_mask mask;
1170 int err;
1171 int disconnect = 0;
1172
1173 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1174
1175 /*
1176 * Stop mpa timer. If it expired, then
1177 * we ignore the MPA reply. process_timeout()
1178 * will abort the connection.
1179 */
1180 if (stop_ep_timer(ep))
1181 return 0;
1182
1183 /*
1184 * If we get more than the supported amount of private data
1185 * then we must fail this connection.
1186 */
1187 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
1188 err = -EINVAL;
1189 goto err;
1190 }
1191
1192 /*
1193 * copy the new data into our accumulation buffer.
1194 */
1195 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
1196 skb->len);
1197 ep->mpa_pkt_len += skb->len;
1198
1199 /*
1200 * if we don't even have the mpa message, then bail.
1201 */
1202 if (ep->mpa_pkt_len < sizeof(*mpa))
1203 return 0;
1204 mpa = (struct mpa_message *) ep->mpa_pkt;
1205
1206 /* Validate MPA header. */
1207 if (mpa->revision > mpa_rev) {
1208 printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d,"
1209 " Received = %d\n", __func__, mpa_rev, mpa->revision);
1210 err = -EPROTO;
1211 goto err;
1212 }
1213 if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
1214 err = -EPROTO;
1215 goto err;
1216 }
1217
1218 plen = ntohs(mpa->private_data_size);
1219
1220 /*
1221 * Fail if there's too much private data.
1222 */
1223 if (plen > MPA_MAX_PRIVATE_DATA) {
1224 err = -EPROTO;
1225 goto err;
1226 }
1227
1228 /*
1229 * If plen does not account for pkt size
1230 */
1231 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1232 err = -EPROTO;
1233 goto err;
1234 }
1235
1236 ep->plen = (u8) plen;
1237
1238 /*
1239 * If we don't have all the pdata yet, then bail.
1240 * We'll continue process when more data arrives.
1241 */
1242 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1243 return 0;
1244
1245 if (mpa->flags & MPA_REJECT) {
1246 err = -ECONNREFUSED;
1247 goto err;
1248 }
1249
1250 /*
1251 * If we get here we have accumulated the entire mpa
1252 * start reply message including private data. And
1253 * the MPA header is valid.
1254 */
1255 __state_set(&ep->com, FPDU_MODE);
1256 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1257 ep->mpa_attr.recv_marker_enabled = markers_enabled;
1258 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
1259 ep->mpa_attr.version = mpa->revision;
1260 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1261
1262 if (mpa->revision == 2) {
1263 ep->mpa_attr.enhanced_rdma_conn =
1264 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
1265 if (ep->mpa_attr.enhanced_rdma_conn) {
1266 mpa_v2_params = (struct mpa_v2_conn_params *)
1267 (ep->mpa_pkt + sizeof(*mpa));
1268 resp_ird = ntohs(mpa_v2_params->ird) &
1269 MPA_V2_IRD_ORD_MASK;
1270 resp_ord = ntohs(mpa_v2_params->ord) &
1271 MPA_V2_IRD_ORD_MASK;
1272
1273 /*
1274 * This is a double-check. Ideally, below checks are
1275 * not required since ird/ord stuff has been taken
1276 * care of in c4iw_accept_cr
1277 */
1278 if ((ep->ird < resp_ord) || (ep->ord > resp_ird)) {
1279 err = -ENOMEM;
1280 ep->ird = resp_ord;
1281 ep->ord = resp_ird;
1282 insuff_ird = 1;
1283 }
1284
1285 if (ntohs(mpa_v2_params->ird) &
1286 MPA_V2_PEER2PEER_MODEL) {
1287 if (ntohs(mpa_v2_params->ord) &
1288 MPA_V2_RDMA_WRITE_RTR)
1289 ep->mpa_attr.p2p_type =
1290 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
1291 else if (ntohs(mpa_v2_params->ord) &
1292 MPA_V2_RDMA_READ_RTR)
1293 ep->mpa_attr.p2p_type =
1294 FW_RI_INIT_P2PTYPE_READ_REQ;
1295 }
1296 }
1297 } else if (mpa->revision == 1)
1298 if (peer2peer)
1299 ep->mpa_attr.p2p_type = p2p_type;
1300
1301 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
1302 "xmit_marker_enabled=%d, version=%d p2p_type=%d local-p2p_type = "
1303 "%d\n", __func__, ep->mpa_attr.crc_enabled,
1304 ep->mpa_attr.recv_marker_enabled,
1305 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1306 ep->mpa_attr.p2p_type, p2p_type);
1307
1308 /*
1309 * If responder's RTR does not match with that of initiator, assign
1310 * FW_RI_INIT_P2PTYPE_DISABLED in mpa attributes so that RTR is not
1311 * generated when moving QP to RTS state.
1312 * A TERM message will be sent after QP has moved to RTS state
1313 */
1314 if ((ep->mpa_attr.version == 2) && peer2peer &&
1315 (ep->mpa_attr.p2p_type != p2p_type)) {
1316 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1317 rtr_mismatch = 1;
1318 }
1319
1320 attrs.mpa_attr = ep->mpa_attr;
1321 attrs.max_ird = ep->ird;
1322 attrs.max_ord = ep->ord;
1323 attrs.llp_stream_handle = ep;
1324 attrs.next_state = C4IW_QP_STATE_RTS;
1325
1326 mask = C4IW_QP_ATTR_NEXT_STATE |
1327 C4IW_QP_ATTR_LLP_STREAM_HANDLE | C4IW_QP_ATTR_MPA_ATTR |
1328 C4IW_QP_ATTR_MAX_IRD | C4IW_QP_ATTR_MAX_ORD;
1329
1330 /* bind QP and TID with INIT_WR */
1331 err = c4iw_modify_qp(ep->com.qp->rhp,
1332 ep->com.qp, mask, &attrs, 1);
1333 if (err)
1334 goto err;
1335
1336 /*
1337 * If responder's RTR requirement did not match with what initiator
1338 * supports, generate TERM message
1339 */
1340 if (rtr_mismatch) {
1341 printk(KERN_ERR "%s: RTR mismatch, sending TERM\n", __func__);
1342 attrs.layer_etype = LAYER_MPA | DDP_LLP;
1343 attrs.ecode = MPA_NOMATCH_RTR;
1344 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1345 attrs.send_term = 1;
1346 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1347 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1348 err = -ENOMEM;
1349 disconnect = 1;
1350 goto out;
1351 }
1352
1353 /*
1354 * Generate TERM if initiator IRD is not sufficient for responder
1355 * provided ORD. Currently, we do the same behaviour even when
1356 * responder provided IRD is also not sufficient as regards to
1357 * initiator ORD.
1358 */
1359 if (insuff_ird) {
1360 printk(KERN_ERR "%s: Insufficient IRD, sending TERM\n",
1361 __func__);
1362 attrs.layer_etype = LAYER_MPA | DDP_LLP;
1363 attrs.ecode = MPA_INSUFF_IRD;
1364 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1365 attrs.send_term = 1;
1366 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1367 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1368 err = -ENOMEM;
1369 disconnect = 1;
1370 goto out;
1371 }
1372 goto out;
1373err:
1374 __state_set(&ep->com, ABORTING);
1375 send_abort(ep, skb, GFP_KERNEL);
1376out:
1377 connect_reply_upcall(ep, err);
1378 return disconnect;
1379}
1380
1381static void process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb)
1382{
1383 struct mpa_message *mpa;
1384 struct mpa_v2_conn_params *mpa_v2_params;
1385 u16 plen;
1386
1387 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1388
1389 /*
1390 * If we get more than the supported amount of private data
1391 * then we must fail this connection.
1392 */
1393 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
1394 (void)stop_ep_timer(ep);
1395 abort_connection(ep, skb, GFP_KERNEL);
1396 return;
1397 }
1398
1399 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
1400
1401 /*
1402 * Copy the new data into our accumulation buffer.
1403 */
1404 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
1405 skb->len);
1406 ep->mpa_pkt_len += skb->len;
1407
1408 /*
1409 * If we don't even have the mpa message, then bail.
1410 * We'll continue process when more data arrives.
1411 */
1412 if (ep->mpa_pkt_len < sizeof(*mpa))
1413 return;
1414
1415 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
1416 mpa = (struct mpa_message *) ep->mpa_pkt;
1417
1418 /*
1419 * Validate MPA Header.
1420 */
1421 if (mpa->revision > mpa_rev) {
1422 printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d,"
1423 " Received = %d\n", __func__, mpa_rev, mpa->revision);
1424 (void)stop_ep_timer(ep);
1425 abort_connection(ep, skb, GFP_KERNEL);
1426 return;
1427 }
1428
1429 if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key))) {
1430 (void)stop_ep_timer(ep);
1431 abort_connection(ep, skb, GFP_KERNEL);
1432 return;
1433 }
1434
1435 plen = ntohs(mpa->private_data_size);
1436
1437 /*
1438 * Fail if there's too much private data.
1439 */
1440 if (plen > MPA_MAX_PRIVATE_DATA) {
1441 (void)stop_ep_timer(ep);
1442 abort_connection(ep, skb, GFP_KERNEL);
1443 return;
1444 }
1445
1446 /*
1447 * If plen does not account for pkt size
1448 */
1449 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1450 (void)stop_ep_timer(ep);
1451 abort_connection(ep, skb, GFP_KERNEL);
1452 return;
1453 }
1454 ep->plen = (u8) plen;
1455
1456 /*
1457 * If we don't have all the pdata yet, then bail.
1458 */
1459 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1460 return;
1461
1462 /*
1463 * If we get here we have accumulated the entire mpa
1464 * start reply message including private data.
1465 */
1466 ep->mpa_attr.initiator = 0;
1467 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1468 ep->mpa_attr.recv_marker_enabled = markers_enabled;
1469 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
1470 ep->mpa_attr.version = mpa->revision;
1471 if (mpa->revision == 1)
1472 ep->tried_with_mpa_v1 = 1;
1473 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1474
1475 if (mpa->revision == 2) {
1476 ep->mpa_attr.enhanced_rdma_conn =
1477 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
1478 if (ep->mpa_attr.enhanced_rdma_conn) {
1479 mpa_v2_params = (struct mpa_v2_conn_params *)
1480 (ep->mpa_pkt + sizeof(*mpa));
1481 ep->ird = ntohs(mpa_v2_params->ird) &
1482 MPA_V2_IRD_ORD_MASK;
1483 ep->ord = ntohs(mpa_v2_params->ord) &
1484 MPA_V2_IRD_ORD_MASK;
1485 if (ntohs(mpa_v2_params->ird) & MPA_V2_PEER2PEER_MODEL)
1486 if (peer2peer) {
1487 if (ntohs(mpa_v2_params->ord) &
1488 MPA_V2_RDMA_WRITE_RTR)
1489 ep->mpa_attr.p2p_type =
1490 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
1491 else if (ntohs(mpa_v2_params->ord) &
1492 MPA_V2_RDMA_READ_RTR)
1493 ep->mpa_attr.p2p_type =
1494 FW_RI_INIT_P2PTYPE_READ_REQ;
1495 }
1496 }
1497 } else if (mpa->revision == 1)
1498 if (peer2peer)
1499 ep->mpa_attr.p2p_type = p2p_type;
1500
1501 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
1502 "xmit_marker_enabled=%d, version=%d p2p_type=%d\n", __func__,
1503 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
1504 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1505 ep->mpa_attr.p2p_type);
1506
1507 /*
1508 * If the endpoint timer already expired, then we ignore
1509 * the start request. process_timeout() will abort
1510 * the connection.
1511 */
1512 if (!stop_ep_timer(ep)) {
1513 __state_set(&ep->com, MPA_REQ_RCVD);
1514
1515 /* drive upcall */
1516 mutex_lock(&ep->parent_ep->com.mutex);
1517 if (ep->parent_ep->com.state != DEAD) {
1518 if (connect_request_upcall(ep))
1519 abort_connection(ep, skb, GFP_KERNEL);
1520 } else {
1521 abort_connection(ep, skb, GFP_KERNEL);
1522 }
1523 mutex_unlock(&ep->parent_ep->com.mutex);
1524 }
1525 return;
1526}
1527
1528static int rx_data(struct c4iw_dev *dev, struct sk_buff *skb)
1529{
1530 struct c4iw_ep *ep;
1531 struct cpl_rx_data *hdr = cplhdr(skb);
1532 unsigned int dlen = ntohs(hdr->len);
1533 unsigned int tid = GET_TID(hdr);
1534 struct tid_info *t = dev->rdev.lldi.tids;
1535 __u8 status = hdr->status;
1536 int disconnect = 0;
1537
1538 ep = lookup_tid(t, tid);
1539 if (!ep)
1540 return 0;
1541 PDBG("%s ep %p tid %u dlen %u\n", __func__, ep, ep->hwtid, dlen);
1542 skb_pull(skb, sizeof(*hdr));
1543 skb_trim(skb, dlen);
1544 mutex_lock(&ep->com.mutex);
1545
1546 /* update RX credits */
1547 update_rx_credits(ep, dlen);
1548
1549 switch (ep->com.state) {
1550 case MPA_REQ_SENT:
1551 ep->rcv_seq += dlen;
1552 disconnect = process_mpa_reply(ep, skb);
1553 break;
1554 case MPA_REQ_WAIT:
1555 ep->rcv_seq += dlen;
1556 process_mpa_request(ep, skb);
1557 break;
1558 case FPDU_MODE: {
1559 struct c4iw_qp_attributes attrs;
1560 BUG_ON(!ep->com.qp);
1561 if (status)
1562 pr_err("%s Unexpected streaming data." \
1563 " qpid %u ep %p state %d tid %u status %d\n",
1564 __func__, ep->com.qp->wq.sq.qid, ep,
1565 ep->com.state, ep->hwtid, status);
1566 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1567 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1568 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1569 disconnect = 1;
1570 break;
1571 }
1572 default:
1573 break;
1574 }
1575 mutex_unlock(&ep->com.mutex);
1576 if (disconnect)
1577 c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
1578 return 0;
1579}
1580
1581static int abort_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1582{
1583 struct c4iw_ep *ep;
1584 struct cpl_abort_rpl_rss *rpl = cplhdr(skb);
1585 int release = 0;
1586 unsigned int tid = GET_TID(rpl);
1587 struct tid_info *t = dev->rdev.lldi.tids;
1588
1589 ep = lookup_tid(t, tid);
1590 if (!ep) {
1591 printk(KERN_WARNING MOD "Abort rpl to freed endpoint\n");
1592 return 0;
1593 }
1594 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1595 mutex_lock(&ep->com.mutex);
1596 switch (ep->com.state) {
1597 case ABORTING:
1598 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
1599 __state_set(&ep->com, DEAD);
1600 release = 1;
1601 break;
1602 default:
1603 printk(KERN_ERR "%s ep %p state %d\n",
1604 __func__, ep, ep->com.state);
1605 break;
1606 }
1607 mutex_unlock(&ep->com.mutex);
1608
1609 if (release)
1610 release_ep_resources(ep);
1611 return 0;
1612}
1613
1614static void send_fw_act_open_req(struct c4iw_ep *ep, unsigned int atid)
1615{
1616 struct sk_buff *skb;
1617 struct fw_ofld_connection_wr *req;
1618 unsigned int mtu_idx;
1619 int wscale;
1620 struct sockaddr_in *sin;
1621
1622 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
1623 req = (struct fw_ofld_connection_wr *)__skb_put(skb, sizeof(*req));
1624 memset(req, 0, sizeof(*req));
1625 req->op_compl = htonl(V_WR_OP(FW_OFLD_CONNECTION_WR));
1626 req->len16_pkd = htonl(FW_WR_LEN16(DIV_ROUND_UP(sizeof(*req), 16)));
1627 req->le.filter = cpu_to_be32(cxgb4_select_ntuple(
1628 ep->com.dev->rdev.lldi.ports[0],
1629 ep->l2t));
1630 sin = (struct sockaddr_in *)&ep->com.local_addr;
1631 req->le.lport = sin->sin_port;
1632 req->le.u.ipv4.lip = sin->sin_addr.s_addr;
1633 sin = (struct sockaddr_in *)&ep->com.remote_addr;
1634 req->le.pport = sin->sin_port;
1635 req->le.u.ipv4.pip = sin->sin_addr.s_addr;
1636 req->tcb.t_state_to_astid =
1637 htonl(V_FW_OFLD_CONNECTION_WR_T_STATE(TCP_SYN_SENT) |
1638 V_FW_OFLD_CONNECTION_WR_ASTID(atid));
1639 req->tcb.cplrxdataack_cplpassacceptrpl =
1640 htons(F_FW_OFLD_CONNECTION_WR_CPLRXDATAACK);
1641 req->tcb.tx_max = (__force __be32) jiffies;
1642 req->tcb.rcv_adv = htons(1);
1643 cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
1644 wscale = compute_wscale(rcv_win);
1645 req->tcb.opt0 = (__force __be64) (TCAM_BYPASS(1) |
1646 (nocong ? NO_CONG(1) : 0) |
1647 KEEP_ALIVE(1) |
1648 DELACK(1) |
1649 WND_SCALE(wscale) |
1650 MSS_IDX(mtu_idx) |
1651 L2T_IDX(ep->l2t->idx) |
1652 TX_CHAN(ep->tx_chan) |
1653 SMAC_SEL(ep->smac_idx) |
1654 DSCP(ep->tos) |
1655 ULP_MODE(ULP_MODE_TCPDDP) |
1656 RCV_BUFSIZ(rcv_win >> 10));
1657 req->tcb.opt2 = (__force __be32) (PACE(1) |
1658 TX_QUEUE(ep->com.dev->rdev.lldi.tx_modq[ep->tx_chan]) |
1659 RX_CHANNEL(0) |
1660 CCTRL_ECN(enable_ecn) |
1661 RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid));
1662 if (enable_tcp_timestamps)
1663 req->tcb.opt2 |= (__force __be32) TSTAMPS_EN(1);
1664 if (enable_tcp_sack)
1665 req->tcb.opt2 |= (__force __be32) SACK_EN(1);
1666 if (wscale && enable_tcp_window_scaling)
1667 req->tcb.opt2 |= (__force __be32) WND_SCALE_EN(1);
1668 req->tcb.opt0 = cpu_to_be64((__force u64) req->tcb.opt0);
1669 req->tcb.opt2 = cpu_to_be32((__force u32) req->tcb.opt2);
1670 set_wr_txq(skb, CPL_PRIORITY_CONTROL, ep->ctrlq_idx);
1671 set_bit(ACT_OFLD_CONN, &ep->com.history);
1672 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1673}
1674
1675/*
1676 * Return whether a failed active open has allocated a TID
1677 */
1678static inline int act_open_has_tid(int status)
1679{
1680 return status != CPL_ERR_TCAM_FULL && status != CPL_ERR_CONN_EXIST &&
1681 status != CPL_ERR_ARP_MISS;
1682}
1683
1684/* Returns whether a CPL status conveys negative advice.
1685 */
1686static int is_neg_adv(unsigned int status)
1687{
1688 return status == CPL_ERR_RTX_NEG_ADVICE ||
1689 status == CPL_ERR_PERSIST_NEG_ADVICE ||
1690 status == CPL_ERR_KEEPALV_NEG_ADVICE;
1691}
1692
1693#define ACT_OPEN_RETRY_COUNT 2
1694
1695static int import_ep(struct c4iw_ep *ep, int iptype, __u8 *peer_ip,
1696 struct dst_entry *dst, struct c4iw_dev *cdev,
1697 bool clear_mpa_v1)
1698{
1699 struct neighbour *n;
1700 int err, step;
1701 struct net_device *pdev;
1702
1703 n = dst_neigh_lookup(dst, peer_ip);
1704 if (!n)
1705 return -ENODEV;
1706
1707 rcu_read_lock();
1708 err = -ENOMEM;
1709 if (n->dev->flags & IFF_LOOPBACK) {
1710 if (iptype == 4)
1711 pdev = ip_dev_find(&init_net, *(__be32 *)peer_ip);
1712 else if (IS_ENABLED(CONFIG_IPV6))
1713 for_each_netdev(&init_net, pdev) {
1714 if (ipv6_chk_addr(&init_net,
1715 (struct in6_addr *)peer_ip,
1716 pdev, 1))
1717 break;
1718 }
1719 else
1720 pdev = NULL;
1721
1722 if (!pdev) {
1723 err = -ENODEV;
1724 goto out;
1725 }
1726 ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
1727 n, pdev, 0);
1728 if (!ep->l2t)
1729 goto out;
1730 ep->mtu = pdev->mtu;
1731 ep->tx_chan = cxgb4_port_chan(pdev);
1732 ep->smac_idx = (cxgb4_port_viid(pdev) & 0x7F) << 1;
1733 step = cdev->rdev.lldi.ntxq /
1734 cdev->rdev.lldi.nchan;
1735 ep->txq_idx = cxgb4_port_idx(pdev) * step;
1736 step = cdev->rdev.lldi.nrxq /
1737 cdev->rdev.lldi.nchan;
1738 ep->ctrlq_idx = cxgb4_port_idx(pdev);
1739 ep->rss_qid = cdev->rdev.lldi.rxq_ids[
1740 cxgb4_port_idx(pdev) * step];
1741 dev_put(pdev);
1742 } else {
1743 pdev = get_real_dev(n->dev);
1744 ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
1745 n, pdev, 0);
1746 if (!ep->l2t)
1747 goto out;
1748 ep->mtu = dst_mtu(dst);
1749 ep->tx_chan = cxgb4_port_chan(n->dev);
1750 ep->smac_idx = (cxgb4_port_viid(n->dev) & 0x7F) << 1;
1751 step = cdev->rdev.lldi.ntxq /
1752 cdev->rdev.lldi.nchan;
1753 ep->txq_idx = cxgb4_port_idx(n->dev) * step;
1754 ep->ctrlq_idx = cxgb4_port_idx(n->dev);
1755 step = cdev->rdev.lldi.nrxq /
1756 cdev->rdev.lldi.nchan;
1757 ep->rss_qid = cdev->rdev.lldi.rxq_ids[
1758 cxgb4_port_idx(n->dev) * step];
1759
1760 if (clear_mpa_v1) {
1761 ep->retry_with_mpa_v1 = 0;
1762 ep->tried_with_mpa_v1 = 0;
1763 }
1764 }
1765 err = 0;
1766out:
1767 rcu_read_unlock();
1768
1769 neigh_release(n);
1770
1771 return err;
1772}
1773
1774static int c4iw_reconnect(struct c4iw_ep *ep)
1775{
1776 int err = 0;
1777 struct sockaddr_in *laddr = (struct sockaddr_in *)
1778 &ep->com.cm_id->local_addr;
1779 struct sockaddr_in *raddr = (struct sockaddr_in *)
1780 &ep->com.cm_id->remote_addr;
1781 struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)
1782 &ep->com.cm_id->local_addr;
1783 struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)
1784 &ep->com.cm_id->remote_addr;
1785 int iptype;
1786 __u8 *ra;
1787
1788 PDBG("%s qp %p cm_id %p\n", __func__, ep->com.qp, ep->com.cm_id);
1789 init_timer(&ep->timer);
1790
1791 /*
1792 * Allocate an active TID to initiate a TCP connection.
1793 */
1794 ep->atid = cxgb4_alloc_atid(ep->com.dev->rdev.lldi.tids, ep);
1795 if (ep->atid == -1) {
1796 pr_err("%s - cannot alloc atid.\n", __func__);
1797 err = -ENOMEM;
1798 goto fail2;
1799 }
1800 insert_handle(ep->com.dev, &ep->com.dev->atid_idr, ep, ep->atid);
1801
1802 /* find a route */
1803 if (ep->com.cm_id->local_addr.ss_family == AF_INET) {
1804 ep->dst = find_route(ep->com.dev, laddr->sin_addr.s_addr,
1805 raddr->sin_addr.s_addr, laddr->sin_port,
1806 raddr->sin_port, 0);
1807 iptype = 4;
1808 ra = (__u8 *)&raddr->sin_addr;
1809 } else {
1810 ep->dst = find_route6(ep->com.dev, laddr6->sin6_addr.s6_addr,
1811 raddr6->sin6_addr.s6_addr,
1812 laddr6->sin6_port, raddr6->sin6_port, 0,
1813 raddr6->sin6_scope_id);
1814 iptype = 6;
1815 ra = (__u8 *)&raddr6->sin6_addr;
1816 }
1817 if (!ep->dst) {
1818 pr_err("%s - cannot find route.\n", __func__);
1819 err = -EHOSTUNREACH;
1820 goto fail3;
1821 }
1822 err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, false);
1823 if (err) {
1824 pr_err("%s - cannot alloc l2e.\n", __func__);
1825 goto fail4;
1826 }
1827
1828 PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
1829 __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
1830 ep->l2t->idx);
1831
1832 state_set(&ep->com, CONNECTING);
1833 ep->tos = 0;
1834
1835 /* send connect request to rnic */
1836 err = send_connect(ep);
1837 if (!err)
1838 goto out;
1839
1840 cxgb4_l2t_release(ep->l2t);
1841fail4:
1842 dst_release(ep->dst);
1843fail3:
1844 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
1845 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
1846fail2:
1847 /*
1848 * remember to send notification to upper layer.
1849 * We are in here so the upper layer is not aware that this is
1850 * re-connect attempt and so, upper layer is still waiting for
1851 * response of 1st connect request.
1852 */
1853 connect_reply_upcall(ep, -ECONNRESET);
1854 c4iw_put_ep(&ep->com);
1855out:
1856 return err;
1857}
1858
1859static int act_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1860{
1861 struct c4iw_ep *ep;
1862 struct cpl_act_open_rpl *rpl = cplhdr(skb);
1863 unsigned int atid = GET_TID_TID(GET_AOPEN_ATID(
1864 ntohl(rpl->atid_status)));
1865 struct tid_info *t = dev->rdev.lldi.tids;
1866 int status = GET_AOPEN_STATUS(ntohl(rpl->atid_status));
1867 struct sockaddr_in *la;
1868 struct sockaddr_in *ra;
1869 struct sockaddr_in6 *la6;
1870 struct sockaddr_in6 *ra6;
1871
1872 ep = lookup_atid(t, atid);
1873 la = (struct sockaddr_in *)&ep->com.local_addr;
1874 ra = (struct sockaddr_in *)&ep->com.remote_addr;
1875 la6 = (struct sockaddr_in6 *)&ep->com.local_addr;
1876 ra6 = (struct sockaddr_in6 *)&ep->com.remote_addr;
1877
1878 PDBG("%s ep %p atid %u status %u errno %d\n", __func__, ep, atid,
1879 status, status2errno(status));
1880
1881 if (is_neg_adv(status)) {
1882 printk(KERN_WARNING MOD "Connection problems for atid %u\n",
1883 atid);
1884 return 0;
1885 }
1886
1887 set_bit(ACT_OPEN_RPL, &ep->com.history);
1888
1889 /*
1890 * Log interesting failures.
1891 */
1892 switch (status) {
1893 case CPL_ERR_CONN_RESET:
1894 case CPL_ERR_CONN_TIMEDOUT:
1895 break;
1896 case CPL_ERR_TCAM_FULL:
1897 mutex_lock(&dev->rdev.stats.lock);
1898 dev->rdev.stats.tcam_full++;
1899 mutex_unlock(&dev->rdev.stats.lock);
1900 if (ep->com.local_addr.ss_family == AF_INET &&
1901 dev->rdev.lldi.enable_fw_ofld_conn) {
1902 send_fw_act_open_req(ep,
1903 GET_TID_TID(GET_AOPEN_ATID(
1904 ntohl(rpl->atid_status))));
1905 return 0;
1906 }
1907 break;
1908 case CPL_ERR_CONN_EXIST:
1909 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
1910 set_bit(ACT_RETRY_INUSE, &ep->com.history);
1911 remove_handle(ep->com.dev, &ep->com.dev->atid_idr,
1912 atid);
1913 cxgb4_free_atid(t, atid);
1914 dst_release(ep->dst);
1915 cxgb4_l2t_release(ep->l2t);
1916 c4iw_reconnect(ep);
1917 return 0;
1918 }
1919 break;
1920 default:
1921 if (ep->com.local_addr.ss_family == AF_INET) {
1922 pr_info("Active open failure - atid %u status %u errno %d %pI4:%u->%pI4:%u\n",
1923 atid, status, status2errno(status),
1924 &la->sin_addr.s_addr, ntohs(la->sin_port),
1925 &ra->sin_addr.s_addr, ntohs(ra->sin_port));
1926 } else {
1927 pr_info("Active open failure - atid %u status %u errno %d %pI6:%u->%pI6:%u\n",
1928 atid, status, status2errno(status),
1929 la6->sin6_addr.s6_addr, ntohs(la6->sin6_port),
1930 ra6->sin6_addr.s6_addr, ntohs(ra6->sin6_port));
1931 }
1932 break;
1933 }
1934
1935 connect_reply_upcall(ep, status2errno(status));
1936 state_set(&ep->com, DEAD);
1937
1938 if (status && act_open_has_tid(status))
1939 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, GET_TID(rpl));
1940
1941 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, atid);
1942 cxgb4_free_atid(t, atid);
1943 dst_release(ep->dst);
1944 cxgb4_l2t_release(ep->l2t);
1945 c4iw_put_ep(&ep->com);
1946
1947 return 0;
1948}
1949
1950static int pass_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1951{
1952 struct cpl_pass_open_rpl *rpl = cplhdr(skb);
1953 struct tid_info *t = dev->rdev.lldi.tids;
1954 unsigned int stid = GET_TID(rpl);
1955 struct c4iw_listen_ep *ep = lookup_stid(t, stid);
1956
1957 if (!ep) {
1958 PDBG("%s stid %d lookup failure!\n", __func__, stid);
1959 goto out;
1960 }
1961 PDBG("%s ep %p status %d error %d\n", __func__, ep,
1962 rpl->status, status2errno(rpl->status));
1963 c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
1964
1965out:
1966 return 0;
1967}
1968
1969static int close_listsrv_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1970{
1971 struct cpl_close_listsvr_rpl *rpl = cplhdr(skb);
1972 struct tid_info *t = dev->rdev.lldi.tids;
1973 unsigned int stid = GET_TID(rpl);
1974 struct c4iw_listen_ep *ep = lookup_stid(t, stid);
1975
1976 PDBG("%s ep %p\n", __func__, ep);
1977 c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
1978 return 0;
1979}
1980
1981static void accept_cr(struct c4iw_ep *ep, struct sk_buff *skb,
1982 struct cpl_pass_accept_req *req)
1983{
1984 struct cpl_pass_accept_rpl *rpl;
1985 unsigned int mtu_idx;
1986 u64 opt0;
1987 u32 opt2;
1988 int wscale;
1989
1990 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1991 BUG_ON(skb_cloned(skb));
1992 skb_trim(skb, sizeof(*rpl));
1993 skb_get(skb);
1994 cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
1995 wscale = compute_wscale(rcv_win);
1996 opt0 = (nocong ? NO_CONG(1) : 0) |
1997 KEEP_ALIVE(1) |
1998 DELACK(1) |
1999 WND_SCALE(wscale) |
2000 MSS_IDX(mtu_idx) |
2001 L2T_IDX(ep->l2t->idx) |
2002 TX_CHAN(ep->tx_chan) |
2003 SMAC_SEL(ep->smac_idx) |
2004 DSCP(ep->tos >> 2) |
2005 ULP_MODE(ULP_MODE_TCPDDP) |
2006 RCV_BUFSIZ(rcv_win>>10);
2007 opt2 = RX_CHANNEL(0) |
2008 RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid);
2009
2010 if (enable_tcp_timestamps && req->tcpopt.tstamp)
2011 opt2 |= TSTAMPS_EN(1);
2012 if (enable_tcp_sack && req->tcpopt.sack)
2013 opt2 |= SACK_EN(1);
2014 if (wscale && enable_tcp_window_scaling)
2015 opt2 |= WND_SCALE_EN(1);
2016 if (enable_ecn) {
2017 const struct tcphdr *tcph;
2018 u32 hlen = ntohl(req->hdr_len);
2019
2020 tcph = (const void *)(req + 1) + G_ETH_HDR_LEN(hlen) +
2021 G_IP_HDR_LEN(hlen);
2022 if (tcph->ece && tcph->cwr)
2023 opt2 |= CCTRL_ECN(1);
2024 }
2025 if (is_t5(ep->com.dev->rdev.lldi.adapter_type)) {
2026 opt2 |= T5_OPT_2_VALID;
2027 opt2 |= V_CONG_CNTRL(CONG_ALG_TAHOE);
2028 }
2029
2030 rpl = cplhdr(skb);
2031 INIT_TP_WR(rpl, ep->hwtid);
2032 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
2033 ep->hwtid));
2034 rpl->opt0 = cpu_to_be64(opt0);
2035 rpl->opt2 = cpu_to_be32(opt2);
2036 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
2037 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
2038 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
2039
2040 return;
2041}
2042
2043static void reject_cr(struct c4iw_dev *dev, u32 hwtid, struct sk_buff *skb)
2044{
2045 PDBG("%s c4iw_dev %p tid %u\n", __func__, dev, hwtid);
2046 BUG_ON(skb_cloned(skb));
2047 skb_trim(skb, sizeof(struct cpl_tid_release));
2048 skb_get(skb);
2049 release_tid(&dev->rdev, hwtid, skb);
2050 return;
2051}
2052
2053static void get_4tuple(struct cpl_pass_accept_req *req, int *iptype,
2054 __u8 *local_ip, __u8 *peer_ip,
2055 __be16 *local_port, __be16 *peer_port)
2056{
2057 int eth_len = G_ETH_HDR_LEN(be32_to_cpu(req->hdr_len));
2058 int ip_len = G_IP_HDR_LEN(be32_to_cpu(req->hdr_len));
2059 struct iphdr *ip = (struct iphdr *)((u8 *)(req + 1) + eth_len);
2060 struct ipv6hdr *ip6 = (struct ipv6hdr *)((u8 *)(req + 1) + eth_len);
2061 struct tcphdr *tcp = (struct tcphdr *)
2062 ((u8 *)(req + 1) + eth_len + ip_len);
2063
2064 if (ip->version == 4) {
2065 PDBG("%s saddr 0x%x daddr 0x%x sport %u dport %u\n", __func__,
2066 ntohl(ip->saddr), ntohl(ip->daddr), ntohs(tcp->source),
2067 ntohs(tcp->dest));
2068 *iptype = 4;
2069 memcpy(peer_ip, &ip->saddr, 4);
2070 memcpy(local_ip, &ip->daddr, 4);
2071 } else {
2072 PDBG("%s saddr %pI6 daddr %pI6 sport %u dport %u\n", __func__,
2073 ip6->saddr.s6_addr, ip6->daddr.s6_addr, ntohs(tcp->source),
2074 ntohs(tcp->dest));
2075 *iptype = 6;
2076 memcpy(peer_ip, ip6->saddr.s6_addr, 16);
2077 memcpy(local_ip, ip6->daddr.s6_addr, 16);
2078 }
2079 *peer_port = tcp->source;
2080 *local_port = tcp->dest;
2081
2082 return;
2083}
2084
2085static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb)
2086{
2087 struct c4iw_ep *child_ep = NULL, *parent_ep;
2088 struct cpl_pass_accept_req *req = cplhdr(skb);
2089 unsigned int stid = GET_POPEN_TID(ntohl(req->tos_stid));
2090 struct tid_info *t = dev->rdev.lldi.tids;
2091 unsigned int hwtid = GET_TID(req);
2092 struct dst_entry *dst;
2093 __u8 local_ip[16], peer_ip[16];
2094 __be16 local_port, peer_port;
2095 int err;
2096 u16 peer_mss = ntohs(req->tcpopt.mss);
2097 int iptype;
2098
2099 parent_ep = lookup_stid(t, stid);
2100 if (!parent_ep) {
2101 PDBG("%s connect request on invalid stid %d\n", __func__, stid);
2102 goto reject;
2103 }
2104
2105 if (state_read(&parent_ep->com) != LISTEN) {
2106 printk(KERN_ERR "%s - listening ep not in LISTEN\n",
2107 __func__);
2108 goto reject;
2109 }
2110
2111 get_4tuple(req, &iptype, local_ip, peer_ip, &local_port, &peer_port);
2112
2113 /* Find output route */
2114 if (iptype == 4) {
2115 PDBG("%s parent ep %p hwtid %u laddr %pI4 raddr %pI4 lport %d rport %d peer_mss %d\n"
2116 , __func__, parent_ep, hwtid,
2117 local_ip, peer_ip, ntohs(local_port),
2118 ntohs(peer_port), peer_mss);
2119 dst = find_route(dev, *(__be32 *)local_ip, *(__be32 *)peer_ip,
2120 local_port, peer_port,
2121 GET_POPEN_TOS(ntohl(req->tos_stid)));
2122 } else {
2123 PDBG("%s parent ep %p hwtid %u laddr %pI6 raddr %pI6 lport %d rport %d peer_mss %d\n"
2124 , __func__, parent_ep, hwtid,
2125 local_ip, peer_ip, ntohs(local_port),
2126 ntohs(peer_port), peer_mss);
2127 dst = find_route6(dev, local_ip, peer_ip, local_port, peer_port,
2128 PASS_OPEN_TOS(ntohl(req->tos_stid)),
2129 ((struct sockaddr_in6 *)
2130 &parent_ep->com.local_addr)->sin6_scope_id);
2131 }
2132 if (!dst) {
2133 printk(KERN_ERR MOD "%s - failed to find dst entry!\n",
2134 __func__);
2135 goto reject;
2136 }
2137
2138 child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL);
2139 if (!child_ep) {
2140 printk(KERN_ERR MOD "%s - failed to allocate ep entry!\n",
2141 __func__);
2142 dst_release(dst);
2143 goto reject;
2144 }
2145
2146 err = import_ep(child_ep, iptype, peer_ip, dst, dev, false);
2147 if (err) {
2148 printk(KERN_ERR MOD "%s - failed to allocate l2t entry!\n",
2149 __func__);
2150 dst_release(dst);
2151 kfree(child_ep);
2152 goto reject;
2153 }
2154
2155 if (peer_mss && child_ep->mtu > (peer_mss + 40))
2156 child_ep->mtu = peer_mss + 40;
2157
2158 state_set(&child_ep->com, CONNECTING);
2159 child_ep->com.dev = dev;
2160 child_ep->com.cm_id = NULL;
2161 if (iptype == 4) {
2162 struct sockaddr_in *sin = (struct sockaddr_in *)
2163 &child_ep->com.local_addr;
2164 sin->sin_family = PF_INET;
2165 sin->sin_port = local_port;
2166 sin->sin_addr.s_addr = *(__be32 *)local_ip;
2167 sin = (struct sockaddr_in *)&child_ep->com.remote_addr;
2168 sin->sin_family = PF_INET;
2169 sin->sin_port = peer_port;
2170 sin->sin_addr.s_addr = *(__be32 *)peer_ip;
2171 } else {
2172 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)
2173 &child_ep->com.local_addr;
2174 sin6->sin6_family = PF_INET6;
2175 sin6->sin6_port = local_port;
2176 memcpy(sin6->sin6_addr.s6_addr, local_ip, 16);
2177 sin6 = (struct sockaddr_in6 *)&child_ep->com.remote_addr;
2178 sin6->sin6_family = PF_INET6;
2179 sin6->sin6_port = peer_port;
2180 memcpy(sin6->sin6_addr.s6_addr, peer_ip, 16);
2181 }
2182 c4iw_get_ep(&parent_ep->com);
2183 child_ep->parent_ep = parent_ep;
2184 child_ep->tos = GET_POPEN_TOS(ntohl(req->tos_stid));
2185 child_ep->dst = dst;
2186 child_ep->hwtid = hwtid;
2187
2188 PDBG("%s tx_chan %u smac_idx %u rss_qid %u\n", __func__,
2189 child_ep->tx_chan, child_ep->smac_idx, child_ep->rss_qid);
2190
2191 init_timer(&child_ep->timer);
2192 cxgb4_insert_tid(t, child_ep, hwtid);
2193 insert_handle(dev, &dev->hwtid_idr, child_ep, child_ep->hwtid);
2194 accept_cr(child_ep, skb, req);
2195 set_bit(PASS_ACCEPT_REQ, &child_ep->com.history);
2196 goto out;
2197reject:
2198 reject_cr(dev, hwtid, skb);
2199out:
2200 return 0;
2201}
2202
2203static int pass_establish(struct c4iw_dev *dev, struct sk_buff *skb)
2204{
2205 struct c4iw_ep *ep;
2206 struct cpl_pass_establish *req = cplhdr(skb);
2207 struct tid_info *t = dev->rdev.lldi.tids;
2208 unsigned int tid = GET_TID(req);
2209
2210 ep = lookup_tid(t, tid);
2211 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2212 ep->snd_seq = be32_to_cpu(req->snd_isn);
2213 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
2214
2215 PDBG("%s ep %p hwtid %u tcp_opt 0x%02x\n", __func__, ep, tid,
2216 ntohs(req->tcp_opt));
2217
2218 set_emss(ep, ntohs(req->tcp_opt));
2219
2220 dst_confirm(ep->dst);
2221 state_set(&ep->com, MPA_REQ_WAIT);
2222 start_ep_timer(ep);
2223 send_flowc(ep, skb);
2224 set_bit(PASS_ESTAB, &ep->com.history);
2225
2226 return 0;
2227}
2228
2229static int peer_close(struct c4iw_dev *dev, struct sk_buff *skb)
2230{
2231 struct cpl_peer_close *hdr = cplhdr(skb);
2232 struct c4iw_ep *ep;
2233 struct c4iw_qp_attributes attrs;
2234 int disconnect = 1;
2235 int release = 0;
2236 struct tid_info *t = dev->rdev.lldi.tids;
2237 unsigned int tid = GET_TID(hdr);
2238 int ret;
2239
2240 ep = lookup_tid(t, tid);
2241 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2242 dst_confirm(ep->dst);
2243
2244 set_bit(PEER_CLOSE, &ep->com.history);
2245 mutex_lock(&ep->com.mutex);
2246 switch (ep->com.state) {
2247 case MPA_REQ_WAIT:
2248 __state_set(&ep->com, CLOSING);
2249 break;
2250 case MPA_REQ_SENT:
2251 __state_set(&ep->com, CLOSING);
2252 connect_reply_upcall(ep, -ECONNRESET);
2253 break;
2254 case MPA_REQ_RCVD:
2255
2256 /*
2257 * We're gonna mark this puppy DEAD, but keep
2258 * the reference on it until the ULP accepts or
2259 * rejects the CR. Also wake up anyone waiting
2260 * in rdma connection migration (see c4iw_accept_cr()).
2261 */
2262 __state_set(&ep->com, CLOSING);
2263 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
2264 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2265 break;
2266 case MPA_REP_SENT:
2267 __state_set(&ep->com, CLOSING);
2268 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
2269 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2270 break;
2271 case FPDU_MODE:
2272 start_ep_timer(ep);
2273 __state_set(&ep->com, CLOSING);
2274 attrs.next_state = C4IW_QP_STATE_CLOSING;
2275 ret = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2276 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2277 if (ret != -ECONNRESET) {
2278 peer_close_upcall(ep);
2279 disconnect = 1;
2280 }
2281 break;
2282 case ABORTING:
2283 disconnect = 0;
2284 break;
2285 case CLOSING:
2286 __state_set(&ep->com, MORIBUND);
2287 disconnect = 0;
2288 break;
2289 case MORIBUND:
2290 (void)stop_ep_timer(ep);
2291 if (ep->com.cm_id && ep->com.qp) {
2292 attrs.next_state = C4IW_QP_STATE_IDLE;
2293 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2294 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2295 }
2296 close_complete_upcall(ep, 0);
2297 __state_set(&ep->com, DEAD);
2298 release = 1;
2299 disconnect = 0;
2300 break;
2301 case DEAD:
2302 disconnect = 0;
2303 break;
2304 default:
2305 BUG_ON(1);
2306 }
2307 mutex_unlock(&ep->com.mutex);
2308 if (disconnect)
2309 c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
2310 if (release)
2311 release_ep_resources(ep);
2312 return 0;
2313}
2314
2315static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb)
2316{
2317 struct cpl_abort_req_rss *req = cplhdr(skb);
2318 struct c4iw_ep *ep;
2319 struct cpl_abort_rpl *rpl;
2320 struct sk_buff *rpl_skb;
2321 struct c4iw_qp_attributes attrs;
2322 int ret;
2323 int release = 0;
2324 struct tid_info *t = dev->rdev.lldi.tids;
2325 unsigned int tid = GET_TID(req);
2326
2327 ep = lookup_tid(t, tid);
2328 if (is_neg_adv(req->status)) {
2329 PDBG("%s neg_adv_abort ep %p tid %u\n", __func__, ep,
2330 ep->hwtid);
2331 return 0;
2332 }
2333 PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
2334 ep->com.state);
2335 set_bit(PEER_ABORT, &ep->com.history);
2336
2337 /*
2338 * Wake up any threads in rdma_init() or rdma_fini().
2339 * However, this is not needed if com state is just
2340 * MPA_REQ_SENT
2341 */
2342 if (ep->com.state != MPA_REQ_SENT)
2343 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2344
2345 mutex_lock(&ep->com.mutex);
2346 switch (ep->com.state) {
2347 case CONNECTING:
2348 break;
2349 case MPA_REQ_WAIT:
2350 (void)stop_ep_timer(ep);
2351 break;
2352 case MPA_REQ_SENT:
2353 (void)stop_ep_timer(ep);
2354 if (mpa_rev == 1 || (mpa_rev == 2 && ep->tried_with_mpa_v1))
2355 connect_reply_upcall(ep, -ECONNRESET);
2356 else {
2357 /*
2358 * we just don't send notification upwards because we
2359 * want to retry with mpa_v1 without upper layers even
2360 * knowing it.
2361 *
2362 * do some housekeeping so as to re-initiate the
2363 * connection
2364 */
2365 PDBG("%s: mpa_rev=%d. Retrying with mpav1\n", __func__,
2366 mpa_rev);
2367 ep->retry_with_mpa_v1 = 1;
2368 }
2369 break;
2370 case MPA_REP_SENT:
2371 break;
2372 case MPA_REQ_RCVD:
2373 break;
2374 case MORIBUND:
2375 case CLOSING:
2376 stop_ep_timer(ep);
2377 /*FALLTHROUGH*/
2378 case FPDU_MODE:
2379 if (ep->com.cm_id && ep->com.qp) {
2380 attrs.next_state = C4IW_QP_STATE_ERROR;
2381 ret = c4iw_modify_qp(ep->com.qp->rhp,
2382 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
2383 &attrs, 1);
2384 if (ret)
2385 printk(KERN_ERR MOD
2386 "%s - qp <- error failed!\n",
2387 __func__);
2388 }
2389 peer_abort_upcall(ep);
2390 break;
2391 case ABORTING:
2392 break;
2393 case DEAD:
2394 PDBG("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__);
2395 mutex_unlock(&ep->com.mutex);
2396 return 0;
2397 default:
2398 BUG_ON(1);
2399 break;
2400 }
2401 dst_confirm(ep->dst);
2402 if (ep->com.state != ABORTING) {
2403 __state_set(&ep->com, DEAD);
2404 /* we don't release if we want to retry with mpa_v1 */
2405 if (!ep->retry_with_mpa_v1)
2406 release = 1;
2407 }
2408 mutex_unlock(&ep->com.mutex);
2409
2410 rpl_skb = get_skb(skb, sizeof(*rpl), GFP_KERNEL);
2411 if (!rpl_skb) {
2412 printk(KERN_ERR MOD "%s - cannot allocate skb!\n",
2413 __func__);
2414 release = 1;
2415 goto out;
2416 }
2417 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
2418 rpl = (struct cpl_abort_rpl *) skb_put(rpl_skb, sizeof(*rpl));
2419 INIT_TP_WR(rpl, ep->hwtid);
2420 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, ep->hwtid));
2421 rpl->cmd = CPL_ABORT_NO_RST;
2422 c4iw_ofld_send(&ep->com.dev->rdev, rpl_skb);
2423out:
2424 if (release)
2425 release_ep_resources(ep);
2426 else if (ep->retry_with_mpa_v1) {
2427 remove_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep->hwtid);
2428 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
2429 dst_release(ep->dst);
2430 cxgb4_l2t_release(ep->l2t);
2431 c4iw_reconnect(ep);
2432 }
2433
2434 return 0;
2435}
2436
2437static int close_con_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2438{
2439 struct c4iw_ep *ep;
2440 struct c4iw_qp_attributes attrs;
2441 struct cpl_close_con_rpl *rpl = cplhdr(skb);
2442 int release = 0;
2443 struct tid_info *t = dev->rdev.lldi.tids;
2444 unsigned int tid = GET_TID(rpl);
2445
2446 ep = lookup_tid(t, tid);
2447
2448 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2449 BUG_ON(!ep);
2450
2451 /* The cm_id may be null if we failed to connect */
2452 mutex_lock(&ep->com.mutex);
2453 switch (ep->com.state) {
2454 case CLOSING:
2455 __state_set(&ep->com, MORIBUND);
2456 break;
2457 case MORIBUND:
2458 (void)stop_ep_timer(ep);
2459 if ((ep->com.cm_id) && (ep->com.qp)) {
2460 attrs.next_state = C4IW_QP_STATE_IDLE;
2461 c4iw_modify_qp(ep->com.qp->rhp,
2462 ep->com.qp,
2463 C4IW_QP_ATTR_NEXT_STATE,
2464 &attrs, 1);
2465 }
2466 close_complete_upcall(ep, 0);
2467 __state_set(&ep->com, DEAD);
2468 release = 1;
2469 break;
2470 case ABORTING:
2471 case DEAD:
2472 break;
2473 default:
2474 BUG_ON(1);
2475 break;
2476 }
2477 mutex_unlock(&ep->com.mutex);
2478 if (release)
2479 release_ep_resources(ep);
2480 return 0;
2481}
2482
2483static int terminate(struct c4iw_dev *dev, struct sk_buff *skb)
2484{
2485 struct cpl_rdma_terminate *rpl = cplhdr(skb);
2486 struct tid_info *t = dev->rdev.lldi.tids;
2487 unsigned int tid = GET_TID(rpl);
2488 struct c4iw_ep *ep;
2489 struct c4iw_qp_attributes attrs;
2490
2491 ep = lookup_tid(t, tid);
2492 BUG_ON(!ep);
2493
2494 if (ep && ep->com.qp) {
2495 printk(KERN_WARNING MOD "TERM received tid %u qpid %u\n", tid,
2496 ep->com.qp->wq.sq.qid);
2497 attrs.next_state = C4IW_QP_STATE_TERMINATE;
2498 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2499 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2500 } else
2501 printk(KERN_WARNING MOD "TERM received tid %u no ep/qp\n", tid);
2502
2503 return 0;
2504}
2505
2506/*
2507 * Upcall from the adapter indicating data has been transmitted.
2508 * For us its just the single MPA request or reply. We can now free
2509 * the skb holding the mpa message.
2510 */
2511static int fw4_ack(struct c4iw_dev *dev, struct sk_buff *skb)
2512{
2513 struct c4iw_ep *ep;
2514 struct cpl_fw4_ack *hdr = cplhdr(skb);
2515 u8 credits = hdr->credits;
2516 unsigned int tid = GET_TID(hdr);
2517 struct tid_info *t = dev->rdev.lldi.tids;
2518
2519
2520 ep = lookup_tid(t, tid);
2521 PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
2522 if (credits == 0) {
2523 PDBG("%s 0 credit ack ep %p tid %u state %u\n",
2524 __func__, ep, ep->hwtid, state_read(&ep->com));
2525 return 0;
2526 }
2527
2528 dst_confirm(ep->dst);
2529 if (ep->mpa_skb) {
2530 PDBG("%s last streaming msg ack ep %p tid %u state %u "
2531 "initiator %u freeing skb\n", __func__, ep, ep->hwtid,
2532 state_read(&ep->com), ep->mpa_attr.initiator ? 1 : 0);
2533 kfree_skb(ep->mpa_skb);
2534 ep->mpa_skb = NULL;
2535 }
2536 return 0;
2537}
2538
2539int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
2540{
2541 int err = 0;
2542 int disconnect = 0;
2543 struct c4iw_ep *ep = to_ep(cm_id);
2544 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2545
2546 mutex_lock(&ep->com.mutex);
2547 if (ep->com.state == DEAD) {
2548 mutex_unlock(&ep->com.mutex);
2549 c4iw_put_ep(&ep->com);
2550 return -ECONNRESET;
2551 }
2552 set_bit(ULP_REJECT, &ep->com.history);
2553 BUG_ON(ep->com.state != MPA_REQ_RCVD);
2554 if (mpa_rev == 0)
2555 abort_connection(ep, NULL, GFP_KERNEL);
2556 else {
2557 err = send_mpa_reject(ep, pdata, pdata_len);
2558 disconnect = 1;
2559 }
2560 mutex_unlock(&ep->com.mutex);
2561 if (disconnect)
2562 err = c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
2563 c4iw_put_ep(&ep->com);
2564 return 0;
2565}
2566
2567int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2568{
2569 int err;
2570 struct c4iw_qp_attributes attrs;
2571 enum c4iw_qp_attr_mask mask;
2572 struct c4iw_ep *ep = to_ep(cm_id);
2573 struct c4iw_dev *h = to_c4iw_dev(cm_id->device);
2574 struct c4iw_qp *qp = get_qhp(h, conn_param->qpn);
2575
2576 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2577
2578 mutex_lock(&ep->com.mutex);
2579 if (ep->com.state == DEAD) {
2580 err = -ECONNRESET;
2581 goto err;
2582 }
2583
2584 BUG_ON(ep->com.state != MPA_REQ_RCVD);
2585 BUG_ON(!qp);
2586
2587 set_bit(ULP_ACCEPT, &ep->com.history);
2588 if ((conn_param->ord > c4iw_max_read_depth) ||
2589 (conn_param->ird > c4iw_max_read_depth)) {
2590 abort_connection(ep, NULL, GFP_KERNEL);
2591 err = -EINVAL;
2592 goto err;
2593 }
2594
2595 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
2596 if (conn_param->ord > ep->ird) {
2597 ep->ird = conn_param->ird;
2598 ep->ord = conn_param->ord;
2599 send_mpa_reject(ep, conn_param->private_data,
2600 conn_param->private_data_len);
2601 abort_connection(ep, NULL, GFP_KERNEL);
2602 err = -ENOMEM;
2603 goto err;
2604 }
2605 if (conn_param->ird > ep->ord) {
2606 if (!ep->ord)
2607 conn_param->ird = 1;
2608 else {
2609 abort_connection(ep, NULL, GFP_KERNEL);
2610 err = -ENOMEM;
2611 goto err;
2612 }
2613 }
2614
2615 }
2616 ep->ird = conn_param->ird;
2617 ep->ord = conn_param->ord;
2618
2619 if (ep->mpa_attr.version != 2)
2620 if (peer2peer && ep->ird == 0)
2621 ep->ird = 1;
2622
2623 PDBG("%s %d ird %d ord %d\n", __func__, __LINE__, ep->ird, ep->ord);
2624
2625 cm_id->add_ref(cm_id);
2626 ep->com.cm_id = cm_id;
2627 ep->com.qp = qp;
2628 ref_qp(ep);
2629
2630 /* bind QP to EP and move to RTS */
2631 attrs.mpa_attr = ep->mpa_attr;
2632 attrs.max_ird = ep->ird;
2633 attrs.max_ord = ep->ord;
2634 attrs.llp_stream_handle = ep;
2635 attrs.next_state = C4IW_QP_STATE_RTS;
2636
2637 /* bind QP and TID with INIT_WR */
2638 mask = C4IW_QP_ATTR_NEXT_STATE |
2639 C4IW_QP_ATTR_LLP_STREAM_HANDLE |
2640 C4IW_QP_ATTR_MPA_ATTR |
2641 C4IW_QP_ATTR_MAX_IRD |
2642 C4IW_QP_ATTR_MAX_ORD;
2643
2644 err = c4iw_modify_qp(ep->com.qp->rhp,
2645 ep->com.qp, mask, &attrs, 1);
2646 if (err)
2647 goto err1;
2648 err = send_mpa_reply(ep, conn_param->private_data,
2649 conn_param->private_data_len);
2650 if (err)
2651 goto err1;
2652
2653 __state_set(&ep->com, FPDU_MODE);
2654 established_upcall(ep);
2655 mutex_unlock(&ep->com.mutex);
2656 c4iw_put_ep(&ep->com);
2657 return 0;
2658err1:
2659 ep->com.cm_id = NULL;
2660 cm_id->rem_ref(cm_id);
2661err:
2662 mutex_unlock(&ep->com.mutex);
2663 c4iw_put_ep(&ep->com);
2664 return err;
2665}
2666
2667static int pick_local_ipaddrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
2668{
2669 struct in_device *ind;
2670 int found = 0;
2671 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
2672 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr;
2673
2674 ind = in_dev_get(dev->rdev.lldi.ports[0]);
2675 if (!ind)
2676 return -EADDRNOTAVAIL;
2677 for_primary_ifa(ind) {
2678 laddr->sin_addr.s_addr = ifa->ifa_address;
2679 raddr->sin_addr.s_addr = ifa->ifa_address;
2680 found = 1;
2681 break;
2682 }
2683 endfor_ifa(ind);
2684 in_dev_put(ind);
2685 return found ? 0 : -EADDRNOTAVAIL;
2686}
2687
2688static int get_lladdr(struct net_device *dev, struct in6_addr *addr,
2689 unsigned char banned_flags)
2690{
2691 struct inet6_dev *idev;
2692 int err = -EADDRNOTAVAIL;
2693
2694 rcu_read_lock();
2695 idev = __in6_dev_get(dev);
2696 if (idev != NULL) {
2697 struct inet6_ifaddr *ifp;
2698
2699 read_lock_bh(&idev->lock);
2700 list_for_each_entry(ifp, &idev->addr_list, if_list) {
2701 if (ifp->scope == IFA_LINK &&
2702 !(ifp->flags & banned_flags)) {
2703 memcpy(addr, &ifp->addr, 16);
2704 err = 0;
2705 break;
2706 }
2707 }
2708 read_unlock_bh(&idev->lock);
2709 }
2710 rcu_read_unlock();
2711 return err;
2712}
2713
2714static int pick_local_ip6addrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
2715{
2716 struct in6_addr uninitialized_var(addr);
2717 struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)&cm_id->local_addr;
2718 struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)&cm_id->remote_addr;
2719
2720 if (get_lladdr(dev->rdev.lldi.ports[0], &addr, IFA_F_TENTATIVE)) {
2721 memcpy(la6->sin6_addr.s6_addr, &addr, 16);
2722 memcpy(ra6->sin6_addr.s6_addr, &addr, 16);
2723 return 0;
2724 }
2725 return -EADDRNOTAVAIL;
2726}
2727
2728int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2729{
2730 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
2731 struct c4iw_ep *ep;
2732 int err = 0;
2733 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
2734 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr;
2735 struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)&cm_id->local_addr;
2736 struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)
2737 &cm_id->remote_addr;
2738 __u8 *ra;
2739 int iptype;
2740
2741 if ((conn_param->ord > c4iw_max_read_depth) ||
2742 (conn_param->ird > c4iw_max_read_depth)) {
2743 err = -EINVAL;
2744 goto out;
2745 }
2746 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
2747 if (!ep) {
2748 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
2749 err = -ENOMEM;
2750 goto out;
2751 }
2752 init_timer(&ep->timer);
2753 ep->plen = conn_param->private_data_len;
2754 if (ep->plen)
2755 memcpy(ep->mpa_pkt + sizeof(struct mpa_message),
2756 conn_param->private_data, ep->plen);
2757 ep->ird = conn_param->ird;
2758 ep->ord = conn_param->ord;
2759
2760 if (peer2peer && ep->ord == 0)
2761 ep->ord = 1;
2762
2763 cm_id->add_ref(cm_id);
2764 ep->com.dev = dev;
2765 ep->com.cm_id = cm_id;
2766 ep->com.qp = get_qhp(dev, conn_param->qpn);
2767 if (!ep->com.qp) {
2768 PDBG("%s qpn 0x%x not found!\n", __func__, conn_param->qpn);
2769 err = -EINVAL;
2770 goto fail2;
2771 }
2772 ref_qp(ep);
2773 PDBG("%s qpn 0x%x qp %p cm_id %p\n", __func__, conn_param->qpn,
2774 ep->com.qp, cm_id);
2775
2776 /*
2777 * Allocate an active TID to initiate a TCP connection.
2778 */
2779 ep->atid = cxgb4_alloc_atid(dev->rdev.lldi.tids, ep);
2780 if (ep->atid == -1) {
2781 printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__);
2782 err = -ENOMEM;
2783 goto fail2;
2784 }
2785 insert_handle(dev, &dev->atid_idr, ep, ep->atid);
2786
2787 if (cm_id->remote_addr.ss_family == AF_INET) {
2788 iptype = 4;
2789 ra = (__u8 *)&raddr->sin_addr;
2790
2791 /*
2792 * Handle loopback requests to INADDR_ANY.
2793 */
2794 if ((__force int)raddr->sin_addr.s_addr == INADDR_ANY) {
2795 err = pick_local_ipaddrs(dev, cm_id);
2796 if (err)
2797 goto fail2;
2798 }
2799
2800 /* find a route */
2801 PDBG("%s saddr %pI4 sport 0x%x raddr %pI4 rport 0x%x\n",
2802 __func__, &laddr->sin_addr, ntohs(laddr->sin_port),
2803 ra, ntohs(raddr->sin_port));
2804 ep->dst = find_route(dev, laddr->sin_addr.s_addr,
2805 raddr->sin_addr.s_addr, laddr->sin_port,
2806 raddr->sin_port, 0);
2807 } else {
2808 iptype = 6;
2809 ra = (__u8 *)&raddr6->sin6_addr;
2810
2811 /*
2812 * Handle loopback requests to INADDR_ANY.
2813 */
2814 if (ipv6_addr_type(&raddr6->sin6_addr) == IPV6_ADDR_ANY) {
2815 err = pick_local_ip6addrs(dev, cm_id);
2816 if (err)
2817 goto fail2;
2818 }
2819
2820 /* find a route */
2821 PDBG("%s saddr %pI6 sport 0x%x raddr %pI6 rport 0x%x\n",
2822 __func__, laddr6->sin6_addr.s6_addr,
2823 ntohs(laddr6->sin6_port),
2824 raddr6->sin6_addr.s6_addr, ntohs(raddr6->sin6_port));
2825 ep->dst = find_route6(dev, laddr6->sin6_addr.s6_addr,
2826 raddr6->sin6_addr.s6_addr,
2827 laddr6->sin6_port, raddr6->sin6_port, 0,
2828 raddr6->sin6_scope_id);
2829 }
2830 if (!ep->dst) {
2831 printk(KERN_ERR MOD "%s - cannot find route.\n", __func__);
2832 err = -EHOSTUNREACH;
2833 goto fail3;
2834 }
2835
2836 err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, true);
2837 if (err) {
2838 printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__);
2839 goto fail4;
2840 }
2841
2842 PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
2843 __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
2844 ep->l2t->idx);
2845
2846 state_set(&ep->com, CONNECTING);
2847 ep->tos = 0;
2848 memcpy(&ep->com.local_addr, &cm_id->local_addr,
2849 sizeof(ep->com.local_addr));
2850 memcpy(&ep->com.remote_addr, &cm_id->remote_addr,
2851 sizeof(ep->com.remote_addr));
2852
2853 /* send connect request to rnic */
2854 err = send_connect(ep);
2855 if (!err)
2856 goto out;
2857
2858 cxgb4_l2t_release(ep->l2t);
2859fail4:
2860 dst_release(ep->dst);
2861fail3:
2862 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
2863 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
2864fail2:
2865 cm_id->rem_ref(cm_id);
2866 c4iw_put_ep(&ep->com);
2867out:
2868 return err;
2869}
2870
2871static int create_server6(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
2872{
2873 int err;
2874 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&ep->com.local_addr;
2875
2876 c4iw_init_wr_wait(&ep->com.wr_wait);
2877 err = cxgb4_create_server6(ep->com.dev->rdev.lldi.ports[0],
2878 ep->stid, &sin6->sin6_addr,
2879 sin6->sin6_port,
2880 ep->com.dev->rdev.lldi.rxq_ids[0]);
2881 if (!err)
2882 err = c4iw_wait_for_reply(&ep->com.dev->rdev,
2883 &ep->com.wr_wait,
2884 0, 0, __func__);
2885 if (err)
2886 pr_err("cxgb4_create_server6/filter failed err %d stid %d laddr %pI6 lport %d\n",
2887 err, ep->stid,
2888 sin6->sin6_addr.s6_addr, ntohs(sin6->sin6_port));
2889 return err;
2890}
2891
2892static int create_server4(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
2893{
2894 int err;
2895 struct sockaddr_in *sin = (struct sockaddr_in *)&ep->com.local_addr;
2896
2897 if (dev->rdev.lldi.enable_fw_ofld_conn) {
2898 do {
2899 err = cxgb4_create_server_filter(
2900 ep->com.dev->rdev.lldi.ports[0], ep->stid,
2901 sin->sin_addr.s_addr, sin->sin_port, 0,
2902 ep->com.dev->rdev.lldi.rxq_ids[0], 0, 0);
2903 if (err == -EBUSY) {
2904 set_current_state(TASK_UNINTERRUPTIBLE);
2905 schedule_timeout(usecs_to_jiffies(100));
2906 }
2907 } while (err == -EBUSY);
2908 } else {
2909 c4iw_init_wr_wait(&ep->com.wr_wait);
2910 err = cxgb4_create_server(ep->com.dev->rdev.lldi.ports[0],
2911 ep->stid, sin->sin_addr.s_addr, sin->sin_port,
2912 0, ep->com.dev->rdev.lldi.rxq_ids[0]);
2913 if (!err)
2914 err = c4iw_wait_for_reply(&ep->com.dev->rdev,
2915 &ep->com.wr_wait,
2916 0, 0, __func__);
2917 }
2918 if (err)
2919 pr_err("cxgb4_create_server/filter failed err %d stid %d laddr %pI4 lport %d\n"
2920 , err, ep->stid,
2921 &sin->sin_addr, ntohs(sin->sin_port));
2922 return err;
2923}
2924
2925int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog)
2926{
2927 int err = 0;
2928 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
2929 struct c4iw_listen_ep *ep;
2930
2931 might_sleep();
2932
2933 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
2934 if (!ep) {
2935 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
2936 err = -ENOMEM;
2937 goto fail1;
2938 }
2939 PDBG("%s ep %p\n", __func__, ep);
2940 cm_id->add_ref(cm_id);
2941 ep->com.cm_id = cm_id;
2942 ep->com.dev = dev;
2943 ep->backlog = backlog;
2944 memcpy(&ep->com.local_addr, &cm_id->local_addr,
2945 sizeof(ep->com.local_addr));
2946
2947 /*
2948 * Allocate a server TID.
2949 */
2950 if (dev->rdev.lldi.enable_fw_ofld_conn &&
2951 ep->com.local_addr.ss_family == AF_INET)
2952 ep->stid = cxgb4_alloc_sftid(dev->rdev.lldi.tids,
2953 cm_id->local_addr.ss_family, ep);
2954 else
2955 ep->stid = cxgb4_alloc_stid(dev->rdev.lldi.tids,
2956 cm_id->local_addr.ss_family, ep);
2957
2958 if (ep->stid == -1) {
2959 printk(KERN_ERR MOD "%s - cannot alloc stid.\n", __func__);
2960 err = -ENOMEM;
2961 goto fail2;
2962 }
2963 insert_handle(dev, &dev->stid_idr, ep, ep->stid);
2964 state_set(&ep->com, LISTEN);
2965 if (ep->com.local_addr.ss_family == AF_INET)
2966 err = create_server4(dev, ep);
2967 else
2968 err = create_server6(dev, ep);
2969 if (!err) {
2970 cm_id->provider_data = ep;
2971 goto out;
2972 }
2973 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
2974 ep->com.local_addr.ss_family);
2975fail2:
2976 cm_id->rem_ref(cm_id);
2977 c4iw_put_ep(&ep->com);
2978fail1:
2979out:
2980 return err;
2981}
2982
2983int c4iw_destroy_listen(struct iw_cm_id *cm_id)
2984{
2985 int err;
2986 struct c4iw_listen_ep *ep = to_listen_ep(cm_id);
2987
2988 PDBG("%s ep %p\n", __func__, ep);
2989
2990 might_sleep();
2991 state_set(&ep->com, DEAD);
2992 if (ep->com.dev->rdev.lldi.enable_fw_ofld_conn &&
2993 ep->com.local_addr.ss_family == AF_INET) {
2994 err = cxgb4_remove_server_filter(
2995 ep->com.dev->rdev.lldi.ports[0], ep->stid,
2996 ep->com.dev->rdev.lldi.rxq_ids[0], 0);
2997 } else {
2998 c4iw_init_wr_wait(&ep->com.wr_wait);
2999 err = cxgb4_remove_server(
3000 ep->com.dev->rdev.lldi.ports[0], ep->stid,
3001 ep->com.dev->rdev.lldi.rxq_ids[0], 0);
3002 if (err)
3003 goto done;
3004 err = c4iw_wait_for_reply(&ep->com.dev->rdev, &ep->com.wr_wait,
3005 0, 0, __func__);
3006 }
3007 remove_handle(ep->com.dev, &ep->com.dev->stid_idr, ep->stid);
3008 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
3009 ep->com.local_addr.ss_family);
3010done:
3011 cm_id->rem_ref(cm_id);
3012 c4iw_put_ep(&ep->com);
3013 return err;
3014}
3015
3016int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp)
3017{
3018 int ret = 0;
3019 int close = 0;
3020 int fatal = 0;
3021 struct c4iw_rdev *rdev;
3022
3023 mutex_lock(&ep->com.mutex);
3024
3025 PDBG("%s ep %p state %s, abrupt %d\n", __func__, ep,
3026 states[ep->com.state], abrupt);
3027
3028 rdev = &ep->com.dev->rdev;
3029 if (c4iw_fatal_error(rdev)) {
3030 fatal = 1;
3031 close_complete_upcall(ep, -EIO);
3032 ep->com.state = DEAD;
3033 }
3034 switch (ep->com.state) {
3035 case MPA_REQ_WAIT:
3036 case MPA_REQ_SENT:
3037 case MPA_REQ_RCVD:
3038 case MPA_REP_SENT:
3039 case FPDU_MODE:
3040 close = 1;
3041 if (abrupt)
3042 ep->com.state = ABORTING;
3043 else {
3044 ep->com.state = CLOSING;
3045 start_ep_timer(ep);
3046 }
3047 set_bit(CLOSE_SENT, &ep->com.flags);
3048 break;
3049 case CLOSING:
3050 if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
3051 close = 1;
3052 if (abrupt) {
3053 (void)stop_ep_timer(ep);
3054 ep->com.state = ABORTING;
3055 } else
3056 ep->com.state = MORIBUND;
3057 }
3058 break;
3059 case MORIBUND:
3060 case ABORTING:
3061 case DEAD:
3062 PDBG("%s ignoring disconnect ep %p state %u\n",
3063 __func__, ep, ep->com.state);
3064 break;
3065 default:
3066 BUG();
3067 break;
3068 }
3069
3070 if (close) {
3071 if (abrupt) {
3072 set_bit(EP_DISC_ABORT, &ep->com.history);
3073 close_complete_upcall(ep, -ECONNRESET);
3074 ret = send_abort(ep, NULL, gfp);
3075 } else {
3076 set_bit(EP_DISC_CLOSE, &ep->com.history);
3077 ret = send_halfclose(ep, gfp);
3078 }
3079 if (ret)
3080 fatal = 1;
3081 }
3082 mutex_unlock(&ep->com.mutex);
3083 if (fatal)
3084 release_ep_resources(ep);
3085 return ret;
3086}
3087
3088static void active_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
3089 struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
3090{
3091 struct c4iw_ep *ep;
3092 int atid = be32_to_cpu(req->tid);
3093
3094 ep = (struct c4iw_ep *)lookup_atid(dev->rdev.lldi.tids,
3095 (__force u32) req->tid);
3096 if (!ep)
3097 return;
3098
3099 switch (req->retval) {
3100 case FW_ENOMEM:
3101 set_bit(ACT_RETRY_NOMEM, &ep->com.history);
3102 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
3103 send_fw_act_open_req(ep, atid);
3104 return;
3105 }
3106 case FW_EADDRINUSE:
3107 set_bit(ACT_RETRY_INUSE, &ep->com.history);
3108 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
3109 send_fw_act_open_req(ep, atid);
3110 return;
3111 }
3112 break;
3113 default:
3114 pr_info("%s unexpected ofld conn wr retval %d\n",
3115 __func__, req->retval);
3116 break;
3117 }
3118 pr_err("active ofld_connect_wr failure %d atid %d\n",
3119 req->retval, atid);
3120 mutex_lock(&dev->rdev.stats.lock);
3121 dev->rdev.stats.act_ofld_conn_fails++;
3122 mutex_unlock(&dev->rdev.stats.lock);
3123 connect_reply_upcall(ep, status2errno(req->retval));
3124 state_set(&ep->com, DEAD);
3125 remove_handle(dev, &dev->atid_idr, atid);
3126 cxgb4_free_atid(dev->rdev.lldi.tids, atid);
3127 dst_release(ep->dst);
3128 cxgb4_l2t_release(ep->l2t);
3129 c4iw_put_ep(&ep->com);
3130}
3131
3132static void passive_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
3133 struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
3134{
3135 struct sk_buff *rpl_skb;
3136 struct cpl_pass_accept_req *cpl;
3137 int ret;
3138
3139 rpl_skb = (struct sk_buff *)(unsigned long)req->cookie;
3140 BUG_ON(!rpl_skb);
3141 if (req->retval) {
3142 PDBG("%s passive open failure %d\n", __func__, req->retval);
3143 mutex_lock(&dev->rdev.stats.lock);
3144 dev->rdev.stats.pas_ofld_conn_fails++;
3145 mutex_unlock(&dev->rdev.stats.lock);
3146 kfree_skb(rpl_skb);
3147 } else {
3148 cpl = (struct cpl_pass_accept_req *)cplhdr(rpl_skb);
3149 OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ,
3150 (__force u32) htonl(
3151 (__force u32) req->tid)));
3152 ret = pass_accept_req(dev, rpl_skb);
3153 if (!ret)
3154 kfree_skb(rpl_skb);
3155 }
3156 return;
3157}
3158
3159static int deferred_fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
3160{
3161 struct cpl_fw6_msg *rpl = cplhdr(skb);
3162 struct cpl_fw6_msg_ofld_connection_wr_rpl *req;
3163
3164 switch (rpl->type) {
3165 case FW6_TYPE_CQE:
3166 c4iw_ev_dispatch(dev, (struct t4_cqe *)&rpl->data[0]);
3167 break;
3168 case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
3169 req = (struct cpl_fw6_msg_ofld_connection_wr_rpl *)rpl->data;
3170 switch (req->t_state) {
3171 case TCP_SYN_SENT:
3172 active_ofld_conn_reply(dev, skb, req);
3173 break;
3174 case TCP_SYN_RECV:
3175 passive_ofld_conn_reply(dev, skb, req);
3176 break;
3177 default:
3178 pr_err("%s unexpected ofld conn wr state %d\n",
3179 __func__, req->t_state);
3180 break;
3181 }
3182 break;
3183 }
3184 return 0;
3185}
3186
3187static void build_cpl_pass_accept_req(struct sk_buff *skb, int stid , u8 tos)
3188{
3189 u32 l2info;
3190 u16 vlantag, len, hdr_len, eth_hdr_len;
3191 u8 intf;
3192 struct cpl_rx_pkt *cpl = cplhdr(skb);
3193 struct cpl_pass_accept_req *req;
3194 struct tcp_options_received tmp_opt;
3195 struct c4iw_dev *dev;
3196
3197 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
3198 /* Store values from cpl_rx_pkt in temporary location. */
3199 vlantag = (__force u16) cpl->vlan;
3200 len = (__force u16) cpl->len;
3201 l2info = (__force u32) cpl->l2info;
3202 hdr_len = (__force u16) cpl->hdr_len;
3203 intf = cpl->iff;
3204
3205 __skb_pull(skb, sizeof(*req) + sizeof(struct rss_header));
3206
3207 /*
3208 * We need to parse the TCP options from SYN packet.
3209 * to generate cpl_pass_accept_req.
3210 */
3211 memset(&tmp_opt, 0, sizeof(tmp_opt));
3212 tcp_clear_options(&tmp_opt);
3213 tcp_parse_options(skb, &tmp_opt, 0, NULL);
3214
3215 req = (struct cpl_pass_accept_req *)__skb_push(skb, sizeof(*req));
3216 memset(req, 0, sizeof(*req));
3217 req->l2info = cpu_to_be16(V_SYN_INTF(intf) |
3218 V_SYN_MAC_IDX(G_RX_MACIDX(
3219 (__force int) htonl(l2info))) |
3220 F_SYN_XACT_MATCH);
3221 eth_hdr_len = is_t4(dev->rdev.lldi.adapter_type) ?
3222 G_RX_ETHHDR_LEN((__force int) htonl(l2info)) :
3223 G_RX_T5_ETHHDR_LEN((__force int) htonl(l2info));
3224 req->hdr_len = cpu_to_be32(V_SYN_RX_CHAN(G_RX_CHAN(
3225 (__force int) htonl(l2info))) |
3226 V_TCP_HDR_LEN(G_RX_TCPHDR_LEN(
3227 (__force int) htons(hdr_len))) |
3228 V_IP_HDR_LEN(G_RX_IPHDR_LEN(
3229 (__force int) htons(hdr_len))) |
3230 V_ETH_HDR_LEN(G_RX_ETHHDR_LEN(eth_hdr_len)));
3231 req->vlan = (__force __be16) vlantag;
3232 req->len = (__force __be16) len;
3233 req->tos_stid = cpu_to_be32(PASS_OPEN_TID(stid) |
3234 PASS_OPEN_TOS(tos));
3235 req->tcpopt.mss = htons(tmp_opt.mss_clamp);
3236 if (tmp_opt.wscale_ok)
3237 req->tcpopt.wsf = tmp_opt.snd_wscale;
3238 req->tcpopt.tstamp = tmp_opt.saw_tstamp;
3239 if (tmp_opt.sack_ok)
3240 req->tcpopt.sack = 1;
3241 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ, 0));
3242 return;
3243}
3244
3245static void send_fw_pass_open_req(struct c4iw_dev *dev, struct sk_buff *skb,
3246 __be32 laddr, __be16 lport,
3247 __be32 raddr, __be16 rport,
3248 u32 rcv_isn, u32 filter, u16 window,
3249 u32 rss_qid, u8 port_id)
3250{
3251 struct sk_buff *req_skb;
3252 struct fw_ofld_connection_wr *req;
3253 struct cpl_pass_accept_req *cpl = cplhdr(skb);
3254 int ret;
3255
3256 req_skb = alloc_skb(sizeof(struct fw_ofld_connection_wr), GFP_KERNEL);
3257 req = (struct fw_ofld_connection_wr *)__skb_put(req_skb, sizeof(*req));
3258 memset(req, 0, sizeof(*req));
3259 req->op_compl = htonl(V_WR_OP(FW_OFLD_CONNECTION_WR) | FW_WR_COMPL(1));
3260 req->len16_pkd = htonl(FW_WR_LEN16(DIV_ROUND_UP(sizeof(*req), 16)));
3261 req->le.version_cpl = htonl(F_FW_OFLD_CONNECTION_WR_CPL);
3262 req->le.filter = (__force __be32) filter;
3263 req->le.lport = lport;
3264 req->le.pport = rport;
3265 req->le.u.ipv4.lip = laddr;
3266 req->le.u.ipv4.pip = raddr;
3267 req->tcb.rcv_nxt = htonl(rcv_isn + 1);
3268 req->tcb.rcv_adv = htons(window);
3269 req->tcb.t_state_to_astid =
3270 htonl(V_FW_OFLD_CONNECTION_WR_T_STATE(TCP_SYN_RECV) |
3271 V_FW_OFLD_CONNECTION_WR_RCV_SCALE(cpl->tcpopt.wsf) |
3272 V_FW_OFLD_CONNECTION_WR_ASTID(
3273 GET_PASS_OPEN_TID(ntohl(cpl->tos_stid))));
3274
3275 /*
3276 * We store the qid in opt2 which will be used by the firmware
3277 * to send us the wr response.
3278 */
3279 req->tcb.opt2 = htonl(V_RSS_QUEUE(rss_qid));
3280
3281 /*
3282 * We initialize the MSS index in TCB to 0xF.
3283 * So that when driver sends cpl_pass_accept_rpl
3284 * TCB picks up the correct value. If this was 0
3285 * TP will ignore any value > 0 for MSS index.
3286 */
3287 req->tcb.opt0 = cpu_to_be64(V_MSS_IDX(0xF));
3288 req->cookie = (unsigned long)skb;
3289
3290 set_wr_txq(req_skb, CPL_PRIORITY_CONTROL, port_id);
3291 ret = cxgb4_ofld_send(dev->rdev.lldi.ports[0], req_skb);
3292 if (ret < 0) {
3293 pr_err("%s - cxgb4_ofld_send error %d - dropping\n", __func__,
3294 ret);
3295 kfree_skb(skb);
3296 kfree_skb(req_skb);
3297 }
3298}
3299
3300/*
3301 * Handler for CPL_RX_PKT message. Need to handle cpl_rx_pkt
3302 * messages when a filter is being used instead of server to
3303 * redirect a syn packet. When packets hit filter they are redirected
3304 * to the offload queue and driver tries to establish the connection
3305 * using firmware work request.
3306 */
3307static int rx_pkt(struct c4iw_dev *dev, struct sk_buff *skb)
3308{
3309 int stid;
3310 unsigned int filter;
3311 struct ethhdr *eh = NULL;
3312 struct vlan_ethhdr *vlan_eh = NULL;
3313 struct iphdr *iph;
3314 struct tcphdr *tcph;
3315 struct rss_header *rss = (void *)skb->data;
3316 struct cpl_rx_pkt *cpl = (void *)skb->data;
3317 struct cpl_pass_accept_req *req = (void *)(rss + 1);
3318 struct l2t_entry *e;
3319 struct dst_entry *dst;
3320 struct c4iw_ep *lep;
3321 u16 window;
3322 struct port_info *pi;
3323 struct net_device *pdev;
3324 u16 rss_qid, eth_hdr_len;
3325 int step;
3326 u32 tx_chan;
3327 struct neighbour *neigh;
3328
3329 /* Drop all non-SYN packets */
3330 if (!(cpl->l2info & cpu_to_be32(F_RXF_SYN)))
3331 goto reject;
3332
3333 /*
3334 * Drop all packets which did not hit the filter.
3335 * Unlikely to happen.
3336 */
3337 if (!(rss->filter_hit && rss->filter_tid))
3338 goto reject;
3339
3340 /*
3341 * Calculate the server tid from filter hit index from cpl_rx_pkt.
3342 */
3343 stid = (__force int) cpu_to_be32((__force u32) rss->hash_val);
3344
3345 lep = (struct c4iw_ep *)lookup_stid(dev->rdev.lldi.tids, stid);
3346 if (!lep) {
3347 PDBG("%s connect request on invalid stid %d\n", __func__, stid);
3348 goto reject;
3349 }
3350
3351 eth_hdr_len = is_t4(dev->rdev.lldi.adapter_type) ?
3352 G_RX_ETHHDR_LEN(htonl(cpl->l2info)) :
3353 G_RX_T5_ETHHDR_LEN(htonl(cpl->l2info));
3354 if (eth_hdr_len == ETH_HLEN) {
3355 eh = (struct ethhdr *)(req + 1);
3356 iph = (struct iphdr *)(eh + 1);
3357 } else {
3358 vlan_eh = (struct vlan_ethhdr *)(req + 1);
3359 iph = (struct iphdr *)(vlan_eh + 1);
3360 skb->vlan_tci = ntohs(cpl->vlan);
3361 }
3362
3363 if (iph->version != 0x4)
3364 goto reject;
3365
3366 tcph = (struct tcphdr *)(iph + 1);
3367 skb_set_network_header(skb, (void *)iph - (void *)rss);
3368 skb_set_transport_header(skb, (void *)tcph - (void *)rss);
3369 skb_get(skb);
3370
3371 PDBG("%s lip 0x%x lport %u pip 0x%x pport %u tos %d\n", __func__,
3372 ntohl(iph->daddr), ntohs(tcph->dest), ntohl(iph->saddr),
3373 ntohs(tcph->source), iph->tos);
3374
3375 dst = find_route(dev, iph->daddr, iph->saddr, tcph->dest, tcph->source,
3376 iph->tos);
3377 if (!dst) {
3378 pr_err("%s - failed to find dst entry!\n",
3379 __func__);
3380 goto reject;
3381 }
3382 neigh = dst_neigh_lookup_skb(dst, skb);
3383
3384 if (!neigh) {
3385 pr_err("%s - failed to allocate neigh!\n",
3386 __func__);
3387 goto free_dst;
3388 }
3389
3390 if (neigh->dev->flags & IFF_LOOPBACK) {
3391 pdev = ip_dev_find(&init_net, iph->daddr);
3392 e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
3393 pdev, 0);
3394 pi = (struct port_info *)netdev_priv(pdev);
3395 tx_chan = cxgb4_port_chan(pdev);
3396 dev_put(pdev);
3397 } else {
3398 pdev = get_real_dev(neigh->dev);
3399 e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
3400 pdev, 0);
3401 pi = (struct port_info *)netdev_priv(pdev);
3402 tx_chan = cxgb4_port_chan(pdev);
3403 }
3404 neigh_release(neigh);
3405 if (!e) {
3406 pr_err("%s - failed to allocate l2t entry!\n",
3407 __func__);
3408 goto free_dst;
3409 }
3410
3411 step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan;
3412 rss_qid = dev->rdev.lldi.rxq_ids[pi->port_id * step];
3413 window = (__force u16) htons((__force u16)tcph->window);
3414
3415 /* Calcuate filter portion for LE region. */
3416 filter = (__force unsigned int) cpu_to_be32(cxgb4_select_ntuple(
3417 dev->rdev.lldi.ports[0],
3418 e));
3419
3420 /*
3421 * Synthesize the cpl_pass_accept_req. We have everything except the
3422 * TID. Once firmware sends a reply with TID we update the TID field
3423 * in cpl and pass it through the regular cpl_pass_accept_req path.
3424 */
3425 build_cpl_pass_accept_req(skb, stid, iph->tos);
3426 send_fw_pass_open_req(dev, skb, iph->daddr, tcph->dest, iph->saddr,
3427 tcph->source, ntohl(tcph->seq), filter, window,
3428 rss_qid, pi->port_id);
3429 cxgb4_l2t_release(e);
3430free_dst:
3431 dst_release(dst);
3432reject:
3433 return 0;
3434}
3435
3436/*
3437 * These are the real handlers that are called from a
3438 * work queue.
3439 */
3440static c4iw_handler_func work_handlers[NUM_CPL_CMDS] = {
3441 [CPL_ACT_ESTABLISH] = act_establish,
3442 [CPL_ACT_OPEN_RPL] = act_open_rpl,
3443 [CPL_RX_DATA] = rx_data,
3444 [CPL_ABORT_RPL_RSS] = abort_rpl,
3445 [CPL_ABORT_RPL] = abort_rpl,
3446 [CPL_PASS_OPEN_RPL] = pass_open_rpl,
3447 [CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl,
3448 [CPL_PASS_ACCEPT_REQ] = pass_accept_req,
3449 [CPL_PASS_ESTABLISH] = pass_establish,
3450 [CPL_PEER_CLOSE] = peer_close,
3451 [CPL_ABORT_REQ_RSS] = peer_abort,
3452 [CPL_CLOSE_CON_RPL] = close_con_rpl,
3453 [CPL_RDMA_TERMINATE] = terminate,
3454 [CPL_FW4_ACK] = fw4_ack,
3455 [CPL_FW6_MSG] = deferred_fw6_msg,
3456 [CPL_RX_PKT] = rx_pkt
3457};
3458
3459static void process_timeout(struct c4iw_ep *ep)
3460{
3461 struct c4iw_qp_attributes attrs;
3462 int abort = 1;
3463
3464 mutex_lock(&ep->com.mutex);
3465 PDBG("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid,
3466 ep->com.state);
3467 set_bit(TIMEDOUT, &ep->com.history);
3468 switch (ep->com.state) {
3469 case MPA_REQ_SENT:
3470 __state_set(&ep->com, ABORTING);
3471 connect_reply_upcall(ep, -ETIMEDOUT);
3472 break;
3473 case MPA_REQ_WAIT:
3474 __state_set(&ep->com, ABORTING);
3475 break;
3476 case CLOSING:
3477 case MORIBUND:
3478 if (ep->com.cm_id && ep->com.qp) {
3479 attrs.next_state = C4IW_QP_STATE_ERROR;
3480 c4iw_modify_qp(ep->com.qp->rhp,
3481 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
3482 &attrs, 1);
3483 }
3484 __state_set(&ep->com, ABORTING);
3485 close_complete_upcall(ep, -ETIMEDOUT);
3486 break;
3487 case ABORTING:
3488 case DEAD:
3489
3490 /*
3491 * These states are expected if the ep timed out at the same
3492 * time as another thread was calling stop_ep_timer().
3493 * So we silently do nothing for these states.
3494 */
3495 abort = 0;
3496 break;
3497 default:
3498 WARN(1, "%s unexpected state ep %p tid %u state %u\n",
3499 __func__, ep, ep->hwtid, ep->com.state);
3500 abort = 0;
3501 }
3502 if (abort)
3503 abort_connection(ep, NULL, GFP_KERNEL);
3504 mutex_unlock(&ep->com.mutex);
3505 c4iw_put_ep(&ep->com);
3506}
3507
3508static void process_timedout_eps(void)
3509{
3510 struct c4iw_ep *ep;
3511
3512 spin_lock_irq(&timeout_lock);
3513 while (!list_empty(&timeout_list)) {
3514 struct list_head *tmp;
3515
3516 tmp = timeout_list.next;
3517 list_del(tmp);
3518 tmp->next = NULL;
3519 tmp->prev = NULL;
3520 spin_unlock_irq(&timeout_lock);
3521 ep = list_entry(tmp, struct c4iw_ep, entry);
3522 process_timeout(ep);
3523 spin_lock_irq(&timeout_lock);
3524 }
3525 spin_unlock_irq(&timeout_lock);
3526}
3527
3528static void process_work(struct work_struct *work)
3529{
3530 struct sk_buff *skb = NULL;
3531 struct c4iw_dev *dev;
3532 struct cpl_act_establish *rpl;
3533 unsigned int opcode;
3534 int ret;
3535
3536 process_timedout_eps();
3537 while ((skb = skb_dequeue(&rxq))) {
3538 rpl = cplhdr(skb);
3539 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
3540 opcode = rpl->ot.opcode;
3541
3542 BUG_ON(!work_handlers[opcode]);
3543 ret = work_handlers[opcode](dev, skb);
3544 if (!ret)
3545 kfree_skb(skb);
3546 process_timedout_eps();
3547 }
3548}
3549
3550static DECLARE_WORK(skb_work, process_work);
3551
3552static void ep_timeout(unsigned long arg)
3553{
3554 struct c4iw_ep *ep = (struct c4iw_ep *)arg;
3555 int kickit = 0;
3556
3557 spin_lock(&timeout_lock);
3558 if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
3559 /*
3560 * Only insert if it is not already on the list.
3561 */
3562 if (!ep->entry.next) {
3563 list_add_tail(&ep->entry, &timeout_list);
3564 kickit = 1;
3565 }
3566 }
3567 spin_unlock(&timeout_lock);
3568 if (kickit)
3569 queue_work(workq, &skb_work);
3570}
3571
3572/*
3573 * All the CM events are handled on a work queue to have a safe context.
3574 */
3575static int sched(struct c4iw_dev *dev, struct sk_buff *skb)
3576{
3577
3578 /*
3579 * Save dev in the skb->cb area.
3580 */
3581 *((struct c4iw_dev **) (skb->cb + sizeof(void *))) = dev;
3582
3583 /*
3584 * Queue the skb and schedule the worker thread.
3585 */
3586 skb_queue_tail(&rxq, skb);
3587 queue_work(workq, &skb_work);
3588 return 0;
3589}
3590
3591static int set_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
3592{
3593 struct cpl_set_tcb_rpl *rpl = cplhdr(skb);
3594
3595 if (rpl->status != CPL_ERR_NONE) {
3596 printk(KERN_ERR MOD "Unexpected SET_TCB_RPL status %u "
3597 "for tid %u\n", rpl->status, GET_TID(rpl));
3598 }
3599 kfree_skb(skb);
3600 return 0;
3601}
3602
3603static int fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
3604{
3605 struct cpl_fw6_msg *rpl = cplhdr(skb);
3606 struct c4iw_wr_wait *wr_waitp;
3607 int ret;
3608
3609 PDBG("%s type %u\n", __func__, rpl->type);
3610
3611 switch (rpl->type) {
3612 case FW6_TYPE_WR_RPL:
3613 ret = (int)((be64_to_cpu(rpl->data[0]) >> 8) & 0xff);
3614 wr_waitp = (struct c4iw_wr_wait *)(__force unsigned long) rpl->data[1];
3615 PDBG("%s wr_waitp %p ret %u\n", __func__, wr_waitp, ret);
3616 if (wr_waitp)
3617 c4iw_wake_up(wr_waitp, ret ? -ret : 0);
3618 kfree_skb(skb);
3619 break;
3620 case FW6_TYPE_CQE:
3621 case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
3622 sched(dev, skb);
3623 break;
3624 default:
3625 printk(KERN_ERR MOD "%s unexpected fw6 msg type %u\n", __func__,
3626 rpl->type);
3627 kfree_skb(skb);
3628 break;
3629 }
3630 return 0;
3631}
3632
3633static int peer_abort_intr(struct c4iw_dev *dev, struct sk_buff *skb)
3634{
3635 struct cpl_abort_req_rss *req = cplhdr(skb);
3636 struct c4iw_ep *ep;
3637 struct tid_info *t = dev->rdev.lldi.tids;
3638 unsigned int tid = GET_TID(req);
3639
3640 ep = lookup_tid(t, tid);
3641 if (!ep) {
3642 printk(KERN_WARNING MOD
3643 "Abort on non-existent endpoint, tid %d\n", tid);
3644 kfree_skb(skb);
3645 return 0;
3646 }
3647 if (is_neg_adv(req->status)) {
3648 PDBG("%s neg_adv_abort ep %p tid %u\n", __func__, ep,
3649 ep->hwtid);
3650 kfree_skb(skb);
3651 return 0;
3652 }
3653 PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
3654 ep->com.state);
3655
3656 /*
3657 * Wake up any threads in rdma_init() or rdma_fini().
3658 * However, if we are on MPAv2 and want to retry with MPAv1
3659 * then, don't wake up yet.
3660 */
3661 if (mpa_rev == 2 && !ep->tried_with_mpa_v1) {
3662 if (ep->com.state != MPA_REQ_SENT)
3663 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
3664 } else
3665 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
3666 sched(dev, skb);
3667 return 0;
3668}
3669
3670/*
3671 * Most upcalls from the T4 Core go to sched() to
3672 * schedule the processing on a work queue.
3673 */
3674c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS] = {
3675 [CPL_ACT_ESTABLISH] = sched,
3676 [CPL_ACT_OPEN_RPL] = sched,
3677 [CPL_RX_DATA] = sched,
3678 [CPL_ABORT_RPL_RSS] = sched,
3679 [CPL_ABORT_RPL] = sched,
3680 [CPL_PASS_OPEN_RPL] = sched,
3681 [CPL_CLOSE_LISTSRV_RPL] = sched,
3682 [CPL_PASS_ACCEPT_REQ] = sched,
3683 [CPL_PASS_ESTABLISH] = sched,
3684 [CPL_PEER_CLOSE] = sched,
3685 [CPL_CLOSE_CON_RPL] = sched,
3686 [CPL_ABORT_REQ_RSS] = peer_abort_intr,
3687 [CPL_RDMA_TERMINATE] = sched,
3688 [CPL_FW4_ACK] = sched,
3689 [CPL_SET_TCB_RPL] = set_tcb_rpl,
3690 [CPL_FW6_MSG] = fw6_msg,
3691 [CPL_RX_PKT] = sched
3692};
3693
3694int __init c4iw_cm_init(void)
3695{
3696 spin_lock_init(&timeout_lock);
3697 skb_queue_head_init(&rxq);
3698
3699 workq = create_singlethread_workqueue("iw_cxgb4");
3700 if (!workq)
3701 return -ENOMEM;
3702
3703 return 0;
3704}
3705
3706void __exit c4iw_cm_term(void)
3707{
3708 WARN_ON(!list_empty(&timeout_list));
3709 flush_workqueue(workq);
3710 destroy_workqueue(workq);
3711}