1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2009-2013, 2016 Chelsio, Inc. All rights reserved.
5 *
6 * This software is available to you under a choice of one of two
7 * licenses. You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
11 *
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
14 * conditions are met:
15 *
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
18 * disclaimer.
19 *
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials
23 * provided with the distribution.
24 *
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 * SOFTWARE.
33 */
34 #include <sys/cdefs.h>
35 #include "opt_inet.h"
36
37 #ifdef TCP_OFFLOAD
38 #include <sys/types.h>
39 #include <sys/malloc.h>
40 #include <sys/socket.h>
41 #include <sys/socketvar.h>
42 #include <sys/sockio.h>
43 #include <sys/taskqueue.h>
44 #include <netinet/in.h>
45 #include <net/route.h>
46 #include <net/route/nhop.h>
47
48 #include <netinet/in_systm.h>
49 #include <netinet/in_pcb.h>
50 #include <netinet6/in6_pcb.h>
51 #include <netinet/ip.h>
52 #include <netinet/in_fib.h>
53 #include <netinet6/in6_fib.h>
54 #include <netinet6/scope6_var.h>
55 #include <netinet/ip_var.h>
56 #include <netinet/tcp_var.h>
57 #include <netinet/tcp.h>
58 #include <netinet/tcpip.h>
59
60 #include <netinet/toecore.h>
61
62 struct sge_iq;
63 struct rss_header;
64 struct cpl_set_tcb_rpl;
65 #include <linux/types.h>
66 #include "offload.h"
67 #include "tom/t4_tom.h"
68
69 #define TOEPCB(so) ((struct toepcb *)(sototcpcb((so))->t_toe))
70
71 #include "iw_cxgbe.h"
72 #include <linux/module.h>
73 #include <linux/workqueue.h>
74 #include <linux/if_vlan.h>
75 #include <net/netevent.h>
76 #include <rdma/rdma_cm.h>
77
78 static spinlock_t req_lock;
79 static TAILQ_HEAD(c4iw_ep_list, c4iw_ep_common) req_list;
80 static struct work_struct c4iw_task;
81 static struct workqueue_struct *c4iw_taskq;
82 static LIST_HEAD(err_cqe_list);
83 static spinlock_t err_cqe_lock;
84 static LIST_HEAD(listen_port_list);
85 static DEFINE_MUTEX(listen_port_mutex);
86
87 static void process_req(struct work_struct *ctx);
88 static void start_ep_timer(struct c4iw_ep *ep);
89 static int stop_ep_timer(struct c4iw_ep *ep);
90 static int set_tcpinfo(struct c4iw_ep *ep);
91 static void process_timeout(struct c4iw_ep *ep);
92 static void process_err_cqes(void);
93 static void *alloc_ep(int size, gfp_t flags);
94 static void close_socket(struct socket *so);
95 static int send_mpa_req(struct c4iw_ep *ep);
96 static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen);
97 static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen);
98 static void close_complete_upcall(struct c4iw_ep *ep, int status);
99 static int send_abort(struct c4iw_ep *ep);
100 static void peer_close_upcall(struct c4iw_ep *ep);
101 static void peer_abort_upcall(struct c4iw_ep *ep);
102 static void connect_reply_upcall(struct c4iw_ep *ep, int status);
103 static int connect_request_upcall(struct c4iw_ep *ep);
104 static void established_upcall(struct c4iw_ep *ep);
105 static int process_mpa_reply(struct c4iw_ep *ep);
106 static int process_mpa_request(struct c4iw_ep *ep);
107 static void process_peer_close(struct c4iw_ep *ep);
108 static void process_conn_error(struct c4iw_ep *ep);
109 static void process_close_complete(struct c4iw_ep *ep);
110 static void ep_timeout(unsigned long arg);
111 static void setiwsockopt(struct socket *so);
112 static void init_iwarp_socket(struct socket *so, void *arg);
113 static void uninit_iwarp_socket(struct socket *so);
114 static void process_data(struct c4iw_ep *ep);
115 static void process_connected(struct c4iw_ep *ep);
116 static int c4iw_so_upcall(struct socket *so, void *arg, int waitflag);
117 static void process_socket_event(struct c4iw_ep *ep);
118 static void release_ep_resources(struct c4iw_ep *ep);
119 static int process_terminate(struct c4iw_ep *ep);
120 static int terminate(struct sge_iq *iq, const struct rss_header *rss,
121 struct mbuf *m);
122 static int add_ep_to_req_list(struct c4iw_ep *ep, int ep_events);
123 static struct listen_port_info *
124 add_ep_to_listenlist(struct c4iw_listen_ep *lep);
125 static int rem_ep_from_listenlist(struct c4iw_listen_ep *lep);
126 static struct c4iw_listen_ep *
127 find_real_listen_ep(struct c4iw_listen_ep *master_lep, struct socket *so);
128 static int get_ifnet_from_raddr(struct sockaddr_storage *raddr,
129 if_t *ifp);
130 static void process_newconn(struct c4iw_listen_ep *master_lep,
131 struct socket *new_so);
132 #define START_EP_TIMER(ep) \
133 do { \
134 CTR3(KTR_IW_CXGBE, "start_ep_timer (%s:%d) ep %p", \
135 __func__, __LINE__, (ep)); \
136 start_ep_timer(ep); \
137 } while (0)
138
139 #define STOP_EP_TIMER(ep) \
140 ({ \
141 CTR3(KTR_IW_CXGBE, "stop_ep_timer (%s:%d) ep %p", \
142 __func__, __LINE__, (ep)); \
143 stop_ep_timer(ep); \
144 })
145
146 #define GET_LOCAL_ADDR(pladdr, so) \
147 do { \
148 struct sockaddr_storage *__a = NULL; \
149 struct inpcb *__inp = sotoinpcb(so); \
150 KASSERT(__inp != NULL, \
151 ("GET_LOCAL_ADDR(%s):so:%p, inp = NULL", __func__, so)); \
152 if (__inp->inp_vflag & INP_IPV4) \
153 in_getsockaddr(so, (struct sockaddr **)&__a); \
154 else \
155 in6_getsockaddr(so, (struct sockaddr **)&__a); \
156 *(pladdr) = *__a; \
157 free(__a, M_SONAME); \
158 } while (0)
159
160 #define GET_REMOTE_ADDR(praddr, so) \
161 do { \
162 struct sockaddr_storage *__a = NULL; \
163 struct inpcb *__inp = sotoinpcb(so); \
164 KASSERT(__inp != NULL, \
165 ("GET_REMOTE_ADDR(%s):so:%p, inp = NULL", __func__, so)); \
166 if (__inp->inp_vflag & INP_IPV4) \
167 in_getpeeraddr(so, (struct sockaddr **)&__a); \
168 else \
169 in6_getpeeraddr(so, (struct sockaddr **)&__a); \
170 *(praddr) = *__a; \
171 free(__a, M_SONAME); \
172 } while (0)
173
174 static char *states[] = {
175 "idle",
176 "listen",
177 "connecting",
178 "mpa_wait_req",
179 "mpa_req_sent",
180 "mpa_req_rcvd",
181 "mpa_rep_sent",
182 "fpdu_mode",
183 "aborting",
184 "closing",
185 "moribund",
186 "dead",
187 NULL,
188 };
189
deref_cm_id(struct c4iw_ep_common * epc)190 static void deref_cm_id(struct c4iw_ep_common *epc)
191 {
192 epc->cm_id->rem_ref(epc->cm_id);
193 epc->cm_id = NULL;
194 set_bit(CM_ID_DEREFED, &epc->history);
195 }
196
ref_cm_id(struct c4iw_ep_common * epc)197 static void ref_cm_id(struct c4iw_ep_common *epc)
198 {
199 set_bit(CM_ID_REFED, &epc->history);
200 epc->cm_id->add_ref(epc->cm_id);
201 }
202
deref_qp(struct c4iw_ep * ep)203 static void deref_qp(struct c4iw_ep *ep)
204 {
205 c4iw_qp_rem_ref(&ep->com.qp->ibqp);
206 clear_bit(QP_REFERENCED, &ep->com.flags);
207 set_bit(QP_DEREFED, &ep->com.history);
208 }
209
ref_qp(struct c4iw_ep * ep)210 static void ref_qp(struct c4iw_ep *ep)
211 {
212 set_bit(QP_REFERENCED, &ep->com.flags);
213 set_bit(QP_REFED, &ep->com.history);
214 c4iw_qp_add_ref(&ep->com.qp->ibqp);
215 }
216 /* allocated per TCP port while listening */
217 struct listen_port_info {
218 uint16_t port_num; /* TCP port address */
219 struct list_head list; /* belongs to listen_port_list */
220 struct list_head lep_list; /* per port lep list */
221 uint32_t refcnt; /* number of lep's listening */
222 };
223
224 /*
225 * Following two lists are used to manage INADDR_ANY listeners:
226 * 1)listen_port_list
227 * 2)lep_list
228 *
229 * Below is the INADDR_ANY listener lists overview on a system with a two port
230 * adapter:
231 * |------------------|
232 * |listen_port_list |
233 * |------------------|
234 * |
235 * | |-----------| |-----------|
236 * | | port_num:X| | port_num:X|
237 * |--------------|-list------|-------|-list------|-------....
238 * | lep_list----| | lep_list----|
239 * | refcnt | | | refcnt | |
240 * | | | | | |
241 * | | | | | |
242 * |-----------| | |-----------| |
243 * | |
244 * | |
245 * | |
246 * | | lep1 lep2
247 * | | |----------------| |----------------|
248 * | |----| listen_ep_list |----| listen_ep_list |
249 * | |----------------| |----------------|
250 * |
251 * |
252 * | lep1 lep2
253 * | |----------------| |----------------|
254 * |---| listen_ep_list |----| listen_ep_list |
255 * |----------------| |----------------|
256 *
257 * Because of two port adapter, the number of lep's are two(lep1 & lep2) for
258 * each TCP port number.
259 *
260 * Here 'lep1' is always marked as Master lep, because solisten() is always
261 * called through first lep.
262 *
263 */
264 static struct listen_port_info *
add_ep_to_listenlist(struct c4iw_listen_ep * lep)265 add_ep_to_listenlist(struct c4iw_listen_ep *lep)
266 {
267 uint16_t port;
268 struct listen_port_info *port_info = NULL;
269 struct sockaddr_storage *laddr = &lep->com.local_addr;
270
271 port = (laddr->ss_family == AF_INET) ?
272 ((struct sockaddr_in *)laddr)->sin_port :
273 ((struct sockaddr_in6 *)laddr)->sin6_port;
274
275 mutex_lock(&listen_port_mutex);
276
277 list_for_each_entry(port_info, &listen_port_list, list)
278 if (port_info->port_num == port)
279 goto found_port;
280
281 port_info = malloc(sizeof(*port_info), M_CXGBE, M_WAITOK);
282 port_info->port_num = port;
283 port_info->refcnt = 0;
284
285 list_add_tail(&port_info->list, &listen_port_list);
286 INIT_LIST_HEAD(&port_info->lep_list);
287
288 found_port:
289 port_info->refcnt++;
290 list_add_tail(&lep->listen_ep_list, &port_info->lep_list);
291 mutex_unlock(&listen_port_mutex);
292 return port_info;
293 }
294
295 static int
rem_ep_from_listenlist(struct c4iw_listen_ep * lep)296 rem_ep_from_listenlist(struct c4iw_listen_ep *lep)
297 {
298 uint16_t port;
299 struct listen_port_info *port_info = NULL;
300 struct sockaddr_storage *laddr = &lep->com.local_addr;
301 int refcnt = 0;
302
303 port = (laddr->ss_family == AF_INET) ?
304 ((struct sockaddr_in *)laddr)->sin_port :
305 ((struct sockaddr_in6 *)laddr)->sin6_port;
306
307 mutex_lock(&listen_port_mutex);
308
309 /* get the port_info structure based on the lep's port address */
310 list_for_each_entry(port_info, &listen_port_list, list) {
311 if (port_info->port_num == port) {
312 port_info->refcnt--;
313 refcnt = port_info->refcnt;
314 /* remove the current lep from the listen list */
315 list_del(&lep->listen_ep_list);
316 if (port_info->refcnt == 0) {
317 /* Remove this entry from the list as there
318 * are no more listeners for this port_num.
319 */
320 list_del(&port_info->list);
321 kfree(port_info);
322 }
323 break;
324 }
325 }
326 mutex_unlock(&listen_port_mutex);
327 return refcnt;
328 }
329
330 /*
331 * Find the lep that belongs to the ifnet on which the SYN frame was received.
332 */
333 struct c4iw_listen_ep *
find_real_listen_ep(struct c4iw_listen_ep * master_lep,struct socket * so)334 find_real_listen_ep(struct c4iw_listen_ep *master_lep, struct socket *so)
335 {
336 struct adapter *adap = NULL;
337 struct c4iw_listen_ep *lep = NULL;
338 if_t ifp = NULL, hw_ifp = NULL;
339 struct listen_port_info *port_info = NULL;
340 int i = 0, found_portinfo = 0, found_lep = 0;
341 uint16_t port;
342
343 /*
344 * STEP 1: Figure out 'ifp' of the physical interface, not pseudo
345 * interfaces like vlan, lagg, etc..
346 * TBD: lagg support, lagg + vlan support.
347 */
348 ifp = TOEPCB(so)->l2te->ifp;
349 if (if_gettype(ifp) == IFT_L2VLAN) {
350 hw_ifp = VLAN_TRUNKDEV(ifp);
351 if (hw_ifp == NULL) {
352 CTR4(KTR_IW_CXGBE, "%s: Failed to get parent ifnet of "
353 "vlan ifnet %p, sock %p, master_lep %p",
354 __func__, ifp, so, master_lep);
355 return (NULL);
356 }
357 } else
358 hw_ifp = ifp;
359
360 /* STEP 2: Find 'port_info' with listener local port address. */
361 port = (master_lep->com.local_addr.ss_family == AF_INET) ?
362 ((struct sockaddr_in *)&master_lep->com.local_addr)->sin_port :
363 ((struct sockaddr_in6 *)&master_lep->com.local_addr)->sin6_port;
364
365
366 mutex_lock(&listen_port_mutex);
367 list_for_each_entry(port_info, &listen_port_list, list)
368 if (port_info->port_num == port) {
369 found_portinfo =1;
370 break;
371 }
372 if (!found_portinfo)
373 goto out;
374
375 /* STEP 3: Traverse through list of lep's that are bound to the current
376 * TCP port address and find the lep that belongs to the ifnet on which
377 * the SYN frame was received.
378 */
379 list_for_each_entry(lep, &port_info->lep_list, listen_ep_list) {
380 adap = lep->com.dev->rdev.adap;
381 for_each_port(adap, i) {
382 if (hw_ifp == adap->port[i]->vi[0].ifp) {
383 found_lep =1;
384 goto out;
385 }
386 }
387 }
388 out:
389 mutex_unlock(&listen_port_mutex);
390 return found_lep ? lep : (NULL);
391 }
392
process_timeout(struct c4iw_ep * ep)393 static void process_timeout(struct c4iw_ep *ep)
394 {
395 struct c4iw_qp_attributes attrs = {0};
396 int abort = 1;
397
398 CTR4(KTR_IW_CXGBE, "%s ep :%p, tid:%u, state %d", __func__,
399 ep, ep->hwtid, ep->com.state);
400 set_bit(TIMEDOUT, &ep->com.history);
401 switch (ep->com.state) {
402 case MPA_REQ_SENT:
403 connect_reply_upcall(ep, -ETIMEDOUT);
404 break;
405 case MPA_REQ_WAIT:
406 case MPA_REQ_RCVD:
407 case MPA_REP_SENT:
408 case FPDU_MODE:
409 break;
410 case CLOSING:
411 case MORIBUND:
412 if (ep->com.cm_id && ep->com.qp) {
413 attrs.next_state = C4IW_QP_STATE_ERROR;
414 c4iw_modify_qp(ep->com.dev, ep->com.qp,
415 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
416 }
417 close_complete_upcall(ep, -ETIMEDOUT);
418 break;
419 case ABORTING:
420 case DEAD:
421 /*
422 * These states are expected if the ep timed out at the same
423 * time as another thread was calling stop_ep_timer().
424 * So we silently do nothing for these states.
425 */
426 abort = 0;
427 break;
428 default:
429 CTR4(KTR_IW_CXGBE, "%s unexpected state ep %p tid %u state %u"
430 , __func__, ep, ep->hwtid, ep->com.state);
431 abort = 0;
432 }
433 if (abort)
434 c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
435 c4iw_put_ep(&ep->com);
436 return;
437 }
438
439 struct cqe_list_entry {
440 struct list_head entry;
441 struct c4iw_dev *rhp;
442 struct t4_cqe err_cqe;
443 };
444
445 static void
process_err_cqes(void)446 process_err_cqes(void)
447 {
448 unsigned long flag;
449 struct cqe_list_entry *cle;
450
451 spin_lock_irqsave(&err_cqe_lock, flag);
452 while (!list_empty(&err_cqe_list)) {
453 struct list_head *tmp;
454 tmp = err_cqe_list.next;
455 list_del(tmp);
456 tmp->next = tmp->prev = NULL;
457 spin_unlock_irqrestore(&err_cqe_lock, flag);
458 cle = list_entry(tmp, struct cqe_list_entry, entry);
459 c4iw_ev_dispatch(cle->rhp, &cle->err_cqe);
460 free(cle, M_CXGBE);
461 spin_lock_irqsave(&err_cqe_lock, flag);
462 }
463 spin_unlock_irqrestore(&err_cqe_lock, flag);
464
465 return;
466 }
467
468 static void
process_req(struct work_struct * ctx)469 process_req(struct work_struct *ctx)
470 {
471 struct c4iw_ep_common *epc;
472 unsigned long flag;
473 int ep_events;
474
475 process_err_cqes();
476 spin_lock_irqsave(&req_lock, flag);
477 while (!TAILQ_EMPTY(&req_list)) {
478 epc = TAILQ_FIRST(&req_list);
479 TAILQ_REMOVE(&req_list, epc, entry);
480 epc->entry.tqe_prev = NULL;
481 ep_events = epc->ep_events;
482 epc->ep_events = 0;
483 spin_unlock_irqrestore(&req_lock, flag);
484 mutex_lock(&epc->mutex);
485 CTR5(KTR_IW_CXGBE, "%s: so %p, ep %p, ep_state %s events 0x%x",
486 __func__, epc->so, epc, states[epc->state], ep_events);
487 if (ep_events & C4IW_EVENT_TERM)
488 process_terminate((struct c4iw_ep *)epc);
489 if (ep_events & C4IW_EVENT_TIMEOUT)
490 process_timeout((struct c4iw_ep *)epc);
491 if (ep_events & C4IW_EVENT_SOCKET)
492 process_socket_event((struct c4iw_ep *)epc);
493 mutex_unlock(&epc->mutex);
494 c4iw_put_ep(epc);
495 process_err_cqes();
496 spin_lock_irqsave(&req_lock, flag);
497 }
498 spin_unlock_irqrestore(&req_lock, flag);
499 }
500
501 /*
502 * XXX: doesn't belong here in the iWARP driver.
503 * XXX: assumes that the connection was offloaded by cxgbe/t4_tom if TF_TOE is
504 * set. Is this a valid assumption for active open?
505 */
506 static int
set_tcpinfo(struct c4iw_ep * ep)507 set_tcpinfo(struct c4iw_ep *ep)
508 {
509 struct socket *so = ep->com.so;
510 struct inpcb *inp = sotoinpcb(so);
511 struct tcpcb *tp;
512 struct toepcb *toep;
513 int rc = 0;
514
515 INP_WLOCK(inp);
516 tp = intotcpcb(inp);
517 if ((tp->t_flags & TF_TOE) == 0) {
518 rc = EINVAL;
519 log(LOG_ERR, "%s: connection not offloaded (so %p, ep %p)\n",
520 __func__, so, ep);
521 goto done;
522 }
523 toep = TOEPCB(so);
524
525 ep->hwtid = toep->tid;
526 ep->snd_seq = tp->snd_nxt;
527 ep->rcv_seq = tp->rcv_nxt;
528 done:
529 INP_WUNLOCK(inp);
530 return (rc);
531
532 }
533 static int
get_ifnet_from_raddr(struct sockaddr_storage * raddr,if_t * ifp)534 get_ifnet_from_raddr(struct sockaddr_storage *raddr, if_t *ifp)
535 {
536 int err = 0;
537 struct nhop_object *nh;
538
539 if (raddr->ss_family == AF_INET) {
540 struct sockaddr_in *raddr4 = (struct sockaddr_in *)raddr;
541
542 nh = fib4_lookup(RT_DEFAULT_FIB, raddr4->sin_addr, 0,
543 NHR_NONE, 0);
544 } else {
545 struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)raddr;
546 struct in6_addr addr6;
547 uint32_t scopeid;
548
549 memset(&addr6, 0, sizeof(addr6));
550 in6_splitscope((struct in6_addr *)&raddr6->sin6_addr,
551 &addr6, &scopeid);
552 nh = fib6_lookup(RT_DEFAULT_FIB, &addr6, scopeid,
553 NHR_NONE, 0);
554 }
555
556 if (nh == NULL)
557 err = EHOSTUNREACH;
558 else
559 *ifp = nh->nh_ifp;
560 CTR2(KTR_IW_CXGBE, "%s: return: %d", __func__, err);
561 return err;
562 }
563
564 static void
close_socket(struct socket * so)565 close_socket(struct socket *so)
566 {
567 uninit_iwarp_socket(so);
568 soclose(so);
569 }
570
571 static void
process_peer_close(struct c4iw_ep * ep)572 process_peer_close(struct c4iw_ep *ep)
573 {
574 struct c4iw_qp_attributes attrs = {0};
575 int disconnect = 1;
576 int release = 0;
577
578 CTR4(KTR_IW_CXGBE, "%s:ppcB ep %p so %p state %s", __func__, ep,
579 ep->com.so, states[ep->com.state]);
580
581 switch (ep->com.state) {
582
583 case MPA_REQ_WAIT:
584 CTR2(KTR_IW_CXGBE, "%s:ppc1 %p MPA_REQ_WAIT DEAD",
585 __func__, ep);
586 /* Fallthrough */
587 case MPA_REQ_SENT:
588 CTR2(KTR_IW_CXGBE, "%s:ppc2 %p MPA_REQ_SENT DEAD",
589 __func__, ep);
590 ep->com.state = DEAD;
591 connect_reply_upcall(ep, -ECONNABORTED);
592
593 disconnect = 0;
594 STOP_EP_TIMER(ep);
595 close_socket(ep->com.so);
596 deref_cm_id(&ep->com);
597 release = 1;
598 break;
599
600 case MPA_REQ_RCVD:
601
602 /*
603 * We're gonna mark this puppy DEAD, but keep
604 * the reference on it until the ULP accepts or
605 * rejects the CR.
606 */
607 CTR2(KTR_IW_CXGBE, "%s:ppc3 %p MPA_REQ_RCVD CLOSING",
608 __func__, ep);
609 ep->com.state = CLOSING;
610 break;
611
612 case MPA_REP_SENT:
613 CTR2(KTR_IW_CXGBE, "%s:ppc4 %p MPA_REP_SENT CLOSING",
614 __func__, ep);
615 ep->com.state = CLOSING;
616 break;
617
618 case FPDU_MODE:
619 CTR2(KTR_IW_CXGBE, "%s:ppc5 %p FPDU_MODE CLOSING",
620 __func__, ep);
621 START_EP_TIMER(ep);
622 ep->com.state = CLOSING;
623 attrs.next_state = C4IW_QP_STATE_CLOSING;
624 c4iw_modify_qp(ep->com.dev, ep->com.qp,
625 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
626 peer_close_upcall(ep);
627 break;
628
629 case ABORTING:
630 CTR2(KTR_IW_CXGBE, "%s:ppc6 %p ABORTING (disconn)",
631 __func__, ep);
632 disconnect = 0;
633 break;
634
635 case CLOSING:
636 CTR2(KTR_IW_CXGBE, "%s:ppc7 %p CLOSING MORIBUND",
637 __func__, ep);
638 ep->com.state = MORIBUND;
639 disconnect = 0;
640 break;
641
642 case MORIBUND:
643 CTR2(KTR_IW_CXGBE, "%s:ppc8 %p MORIBUND DEAD", __func__,
644 ep);
645 STOP_EP_TIMER(ep);
646 if (ep->com.cm_id && ep->com.qp) {
647 attrs.next_state = C4IW_QP_STATE_IDLE;
648 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
649 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
650 }
651 close_socket(ep->com.so);
652 close_complete_upcall(ep, 0);
653 ep->com.state = DEAD;
654 release = 1;
655 disconnect = 0;
656 break;
657
658 case DEAD:
659 CTR2(KTR_IW_CXGBE, "%s:ppc9 %p DEAD (disconn)",
660 __func__, ep);
661 disconnect = 0;
662 break;
663
664 default:
665 panic("%s: ep %p state %d", __func__, ep,
666 ep->com.state);
667 break;
668 }
669
670
671 if (disconnect) {
672
673 CTR2(KTR_IW_CXGBE, "%s:ppca %p", __func__, ep);
674 c4iw_ep_disconnect(ep, 0, M_NOWAIT);
675 }
676 if (release) {
677
678 CTR2(KTR_IW_CXGBE, "%s:ppcb %p", __func__, ep);
679 c4iw_put_ep(&ep->com);
680 }
681 CTR2(KTR_IW_CXGBE, "%s:ppcE %p", __func__, ep);
682 return;
683 }
684
685 static void
process_conn_error(struct c4iw_ep * ep)686 process_conn_error(struct c4iw_ep *ep)
687 {
688 struct c4iw_qp_attributes attrs = {0};
689 int ret;
690 int state;
691
692 state = ep->com.state;
693 CTR5(KTR_IW_CXGBE, "%s:pceB ep %p so %p so->so_error %u state %s",
694 __func__, ep, ep->com.so, ep->com.so->so_error,
695 states[ep->com.state]);
696
697 switch (state) {
698
699 case MPA_REQ_WAIT:
700 STOP_EP_TIMER(ep);
701 c4iw_put_ep(&ep->parent_ep->com);
702 break;
703
704 case MPA_REQ_SENT:
705 STOP_EP_TIMER(ep);
706 connect_reply_upcall(ep, -ECONNRESET);
707 break;
708
709 case MPA_REP_SENT:
710 ep->com.rpl_err = ECONNRESET;
711 CTR1(KTR_IW_CXGBE, "waking up ep %p", ep);
712 break;
713
714 case MPA_REQ_RCVD:
715 break;
716
717 case MORIBUND:
718 case CLOSING:
719 STOP_EP_TIMER(ep);
720 /*FALLTHROUGH*/
721 case FPDU_MODE:
722
723 if (ep->com.cm_id && ep->com.qp) {
724
725 attrs.next_state = C4IW_QP_STATE_ERROR;
726 ret = c4iw_modify_qp(ep->com.qp->rhp,
727 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
728 &attrs, 1);
729 if (ret)
730 log(LOG_ERR,
731 "%s - qp <- error failed!\n",
732 __func__);
733 }
734 peer_abort_upcall(ep);
735 break;
736
737 case ABORTING:
738 break;
739
740 case DEAD:
741 CTR2(KTR_IW_CXGBE, "%s so_error %d IN DEAD STATE!!!!",
742 __func__, ep->com.so->so_error);
743 return;
744
745 default:
746 panic("%s: ep %p state %d", __func__, ep, state);
747 break;
748 }
749
750 if (state != ABORTING) {
751 close_socket(ep->com.so);
752 ep->com.state = DEAD;
753 c4iw_put_ep(&ep->com);
754 }
755 CTR2(KTR_IW_CXGBE, "%s:pceE %p", __func__, ep);
756 return;
757 }
758
759 static void
process_close_complete(struct c4iw_ep * ep)760 process_close_complete(struct c4iw_ep *ep)
761 {
762 struct c4iw_qp_attributes attrs = {0};
763 int release = 0;
764
765 CTR4(KTR_IW_CXGBE, "%s:pccB ep %p so %p state %s", __func__, ep,
766 ep->com.so, states[ep->com.state]);
767
768 /* The cm_id may be null if we failed to connect */
769 set_bit(CLOSE_CON_RPL, &ep->com.history);
770
771 switch (ep->com.state) {
772
773 case CLOSING:
774 CTR2(KTR_IW_CXGBE, "%s:pcc1 %p CLOSING MORIBUND",
775 __func__, ep);
776 ep->com.state = MORIBUND;
777 break;
778
779 case MORIBUND:
780 CTR2(KTR_IW_CXGBE, "%s:pcc1 %p MORIBUND DEAD", __func__,
781 ep);
782 STOP_EP_TIMER(ep);
783
784 if ((ep->com.cm_id) && (ep->com.qp)) {
785
786 CTR2(KTR_IW_CXGBE, "%s:pcc2 %p QP_STATE_IDLE",
787 __func__, ep);
788 attrs.next_state = C4IW_QP_STATE_IDLE;
789 c4iw_modify_qp(ep->com.dev,
790 ep->com.qp,
791 C4IW_QP_ATTR_NEXT_STATE,
792 &attrs, 1);
793 }
794
795 close_socket(ep->com.so);
796 close_complete_upcall(ep, 0);
797 ep->com.state = DEAD;
798 release = 1;
799 break;
800
801 case ABORTING:
802 CTR2(KTR_IW_CXGBE, "%s:pcc5 %p ABORTING", __func__, ep);
803 break;
804
805 case DEAD:
806 CTR2(KTR_IW_CXGBE, "%s:pcc6 %p DEAD", __func__, ep);
807 break;
808 default:
809 CTR2(KTR_IW_CXGBE, "%s:pcc7 %p unknown ep state",
810 __func__, ep);
811 panic("%s:pcc6 %p unknown ep state", __func__, ep);
812 break;
813 }
814
815 if (release) {
816
817 CTR2(KTR_IW_CXGBE, "%s:pcc8 %p", __func__, ep);
818 release_ep_resources(ep);
819 }
820 CTR2(KTR_IW_CXGBE, "%s:pccE %p", __func__, ep);
821 return;
822 }
823
824 static void
setiwsockopt(struct socket * so)825 setiwsockopt(struct socket *so)
826 {
827 int rc;
828 struct sockopt sopt;
829 int on = 1;
830
831 sopt.sopt_dir = SOPT_SET;
832 sopt.sopt_level = IPPROTO_TCP;
833 sopt.sopt_name = TCP_NODELAY;
834 sopt.sopt_val = (caddr_t)&on;
835 sopt.sopt_valsize = sizeof on;
836 sopt.sopt_td = NULL;
837 rc = -sosetopt(so, &sopt);
838 if (rc) {
839 log(LOG_ERR, "%s: can't set TCP_NODELAY on so %p (%d)\n",
840 __func__, so, rc);
841 }
842 }
843
844 static void
init_iwarp_socket(struct socket * so,void * arg)845 init_iwarp_socket(struct socket *so, void *arg)
846 {
847 if (SOLISTENING(so)) {
848 SOLISTEN_LOCK(so);
849 solisten_upcall_set(so, c4iw_so_upcall, arg);
850 so->so_state |= SS_NBIO;
851 SOLISTEN_UNLOCK(so);
852 } else {
853 SOCKBUF_LOCK(&so->so_rcv);
854 soupcall_set(so, SO_RCV, c4iw_so_upcall, arg);
855 so->so_state |= SS_NBIO;
856 SOCKBUF_UNLOCK(&so->so_rcv);
857 }
858 }
859
860 static void
uninit_iwarp_socket(struct socket * so)861 uninit_iwarp_socket(struct socket *so)
862 {
863 if (SOLISTENING(so)) {
864 SOLISTEN_LOCK(so);
865 solisten_upcall_set(so, NULL, NULL);
866 SOLISTEN_UNLOCK(so);
867 } else {
868 SOCKBUF_LOCK(&so->so_rcv);
869 soupcall_clear(so, SO_RCV);
870 SOCKBUF_UNLOCK(&so->so_rcv);
871 }
872 }
873
874 static void
process_data(struct c4iw_ep * ep)875 process_data(struct c4iw_ep *ep)
876 {
877 int ret = 0;
878 int disconnect = 0;
879 struct c4iw_qp_attributes attrs = {0};
880
881 CTR5(KTR_IW_CXGBE, "%s: so %p, ep %p, state %s, sbused %d", __func__,
882 ep->com.so, ep, states[ep->com.state], sbused(&ep->com.so->so_rcv));
883
884 switch (ep->com.state) {
885 case MPA_REQ_SENT:
886 disconnect = process_mpa_reply(ep);
887 break;
888 case MPA_REQ_WAIT:
889 disconnect = process_mpa_request(ep);
890 if (disconnect)
891 /* Refered in process_newconn() */
892 c4iw_put_ep(&ep->parent_ep->com);
893 break;
894 case FPDU_MODE:
895 MPASS(ep->com.qp != NULL);
896 attrs.next_state = C4IW_QP_STATE_TERMINATE;
897 ret = c4iw_modify_qp(ep->com.dev, ep->com.qp,
898 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
899 if (ret != -EINPROGRESS)
900 disconnect = 1;
901 break;
902 default:
903 log(LOG_ERR, "%s: Unexpected streaming data. ep %p, "
904 "state %d, so %p, so_state 0x%x, sbused %u\n",
905 __func__, ep, ep->com.state, ep->com.so,
906 ep->com.so->so_state, sbused(&ep->com.so->so_rcv));
907 break;
908 }
909 if (disconnect)
910 c4iw_ep_disconnect(ep, disconnect == 2, GFP_KERNEL);
911
912 }
913
914 static void
process_connected(struct c4iw_ep * ep)915 process_connected(struct c4iw_ep *ep)
916 {
917 struct socket *so = ep->com.so;
918
919 if ((so->so_state & SS_ISCONNECTED) && !so->so_error) {
920 if (send_mpa_req(ep))
921 goto err;
922 } else {
923 connect_reply_upcall(ep, -so->so_error);
924 goto err;
925 }
926 return;
927 err:
928 close_socket(so);
929 ep->com.state = DEAD;
930 c4iw_put_ep(&ep->com);
931 return;
932 }
933
c4iw_zero_addr(struct sockaddr * addr)934 static inline bool c4iw_zero_addr(struct sockaddr *addr)
935 {
936 struct in6_addr *ip6;
937
938 if (addr->sa_family == AF_INET)
939 return (((struct sockaddr_in *)addr)->sin_addr.s_addr == 0);
940 else {
941 ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr;
942 return (ip6->s6_addr32[0] | ip6->s6_addr32[1] |
943 ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0;
944 }
945 }
946
947 #define _IN_LOOPBACK(i) (((in_addr_t)(i) & 0xff000000) == 0x7f000000)
c4iw_loopback_addr(struct sockaddr * addr,struct vnet * vnet)948 static inline bool c4iw_loopback_addr(struct sockaddr *addr, struct vnet *vnet)
949 {
950 bool ret;
951
952 if (addr->sa_family == AF_INET) {
953 if (vnet == NULL)
954 ret = _IN_LOOPBACK(ntohl(((struct sockaddr_in *) addr)->sin_addr.s_addr));
955 else {
956 CURVNET_SET_QUIET(vnet);
957 ret = IN_LOOPBACK(ntohl(((struct sockaddr_in *) addr)->sin_addr.s_addr));
958 CURVNET_RESTORE();
959 }
960 } else {
961 ret = IN6_IS_ADDR_LOOPBACK(&((struct sockaddr_in6 *) addr)->sin6_addr);
962 }
963 return (ret);
964 }
965 #undef _IN_LOOPBACK
966
c4iw_any_addr(struct sockaddr * addr,struct vnet * vnet)967 static inline bool c4iw_any_addr(struct sockaddr *addr, struct vnet *vnet)
968 {
969 return c4iw_zero_addr(addr) || c4iw_loopback_addr(addr, vnet);
970 }
971
972 static void
process_newconn(struct c4iw_listen_ep * master_lep,struct socket * new_so)973 process_newconn(struct c4iw_listen_ep *master_lep, struct socket *new_so)
974 {
975 struct c4iw_listen_ep *real_lep = NULL;
976 struct c4iw_ep *new_ep = NULL;
977 struct sockaddr_in *remote = NULL;
978 int ret = 0;
979
980 MPASS(new_so != NULL);
981
982 if (c4iw_any_addr((struct sockaddr *)&master_lep->com.local_addr,
983 new_so->so_vnet)) {
984 /* Here we need to find the 'real_lep' that belongs to the
985 * incomming socket's network interface, such that the newly
986 * created 'ep' can be attached to the real 'lep'.
987 */
988 real_lep = find_real_listen_ep(master_lep, new_so);
989 if (real_lep == NULL) {
990 CTR2(KTR_IW_CXGBE, "%s: Could not find the real listen "
991 "ep for sock: %p", __func__, new_so);
992 log(LOG_ERR,"%s: Could not find the real listen ep for "
993 "sock: %p\n", __func__, new_so);
994 /* FIXME: properly free the 'new_so' in failure case.
995 * Use of soabort() and soclose() are not legal
996 * here(before soaccept()).
997 */
998 return;
999 }
1000 } else /* for Non-Wildcard address, master_lep is always the real_lep */
1001 real_lep = master_lep;
1002
1003 new_ep = alloc_ep(sizeof(*new_ep), GFP_KERNEL);
1004
1005 CTR6(KTR_IW_CXGBE, "%s: master_lep %p, real_lep: %p, new ep %p, "
1006 "listening so %p, new so %p", __func__, master_lep, real_lep,
1007 new_ep, master_lep->com.so, new_so);
1008
1009 new_ep->com.dev = real_lep->com.dev;
1010 new_ep->com.so = new_so;
1011 new_ep->com.cm_id = NULL;
1012 new_ep->com.thread = real_lep->com.thread;
1013 new_ep->parent_ep = real_lep;
1014
1015 GET_LOCAL_ADDR(&new_ep->com.local_addr, new_so);
1016 GET_REMOTE_ADDR(&new_ep->com.remote_addr, new_so);
1017 c4iw_get_ep(&real_lep->com);
1018 init_timer(&new_ep->timer);
1019 new_ep->com.state = MPA_REQ_WAIT;
1020
1021 setiwsockopt(new_so);
1022 ret = soaccept(new_so, (struct sockaddr **)&remote);
1023 if (ret != 0) {
1024 CTR4(KTR_IW_CXGBE,
1025 "%s:listen sock:%p, new sock:%p, ret:%d",
1026 __func__, master_lep->com.so, new_so, ret);
1027 if (remote != NULL)
1028 free(remote, M_SONAME);
1029 soclose(new_so);
1030 c4iw_put_ep(&new_ep->com);
1031 c4iw_put_ep(&real_lep->com);
1032 return;
1033 }
1034 free(remote, M_SONAME);
1035
1036 START_EP_TIMER(new_ep);
1037
1038 /* MPA request might have been queued up on the socket already, so we
1039 * initialize the socket/upcall_handler under lock to prevent processing
1040 * MPA request on another thread(via process_req()) simultaneously.
1041 */
1042 c4iw_get_ep(&new_ep->com); /* Dereferenced at the end below, this is to
1043 avoid freeing of ep before ep unlock. */
1044 mutex_lock(&new_ep->com.mutex);
1045 init_iwarp_socket(new_so, &new_ep->com);
1046
1047 ret = process_mpa_request(new_ep);
1048 if (ret) {
1049 /* ABORT */
1050 c4iw_ep_disconnect(new_ep, 1, GFP_KERNEL);
1051 c4iw_put_ep(&real_lep->com);
1052 }
1053 mutex_unlock(&new_ep->com.mutex);
1054 c4iw_put_ep(&new_ep->com);
1055 return;
1056 }
1057
1058 static int
add_ep_to_req_list(struct c4iw_ep * ep,int new_ep_event)1059 add_ep_to_req_list(struct c4iw_ep *ep, int new_ep_event)
1060 {
1061 unsigned long flag;
1062
1063 spin_lock_irqsave(&req_lock, flag);
1064 if (ep && ep->com.so) {
1065 ep->com.ep_events |= new_ep_event;
1066 if (!ep->com.entry.tqe_prev) {
1067 c4iw_get_ep(&ep->com);
1068 TAILQ_INSERT_TAIL(&req_list, &ep->com, entry);
1069 queue_work(c4iw_taskq, &c4iw_task);
1070 }
1071 }
1072 spin_unlock_irqrestore(&req_lock, flag);
1073
1074 return (0);
1075 }
1076
1077 static int
c4iw_so_upcall(struct socket * so,void * arg,int waitflag)1078 c4iw_so_upcall(struct socket *so, void *arg, int waitflag)
1079 {
1080 struct c4iw_ep *ep = arg;
1081
1082 CTR6(KTR_IW_CXGBE,
1083 "%s: so %p, so_state 0x%x, ep %p, ep_state %s, tqe_prev %p",
1084 __func__, so, so->so_state, ep, states[ep->com.state],
1085 ep->com.entry.tqe_prev);
1086
1087 MPASS(ep->com.so == so);
1088 /*
1089 * Wake up any threads waiting in rdma_init()/rdma_fini(),
1090 * with locks held.
1091 */
1092 if (so->so_error || c4iw_stopped(&ep->com.dev->rdev))
1093 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
1094 add_ep_to_req_list(ep, C4IW_EVENT_SOCKET);
1095
1096 return (SU_OK);
1097 }
1098
1099
1100 static int
terminate(struct sge_iq * iq,const struct rss_header * rss,struct mbuf * m)1101 terminate(struct sge_iq *iq, const struct rss_header *rss, struct mbuf *m)
1102 {
1103 struct adapter *sc = iq->adapter;
1104 const struct cpl_rdma_terminate *cpl = mtod(m, const void *);
1105 unsigned int tid = GET_TID(cpl);
1106 struct toepcb *toep = lookup_tid(sc, tid);
1107 struct socket *so;
1108 struct c4iw_ep *ep;
1109
1110 INP_WLOCK(toep->inp);
1111 so = inp_inpcbtosocket(toep->inp);
1112 ep = so->so_rcv.sb_upcallarg;
1113 INP_WUNLOCK(toep->inp);
1114
1115 CTR3(KTR_IW_CXGBE, "%s: so %p, ep %p", __func__, so, ep);
1116 add_ep_to_req_list(ep, C4IW_EVENT_TERM);
1117
1118 return 0;
1119 }
1120
1121 static void
process_socket_event(struct c4iw_ep * ep)1122 process_socket_event(struct c4iw_ep *ep)
1123 {
1124 int state = ep->com.state;
1125 struct socket *so = ep->com.so;
1126
1127 if (ep->com.state == DEAD) {
1128 CTR3(KTR_IW_CXGBE, "%s: Pending socket event discarded "
1129 "ep %p ep_state %s", __func__, ep, states[state]);
1130 return;
1131 }
1132
1133 CTR6(KTR_IW_CXGBE, "process_socket_event: so %p, so_state 0x%x, "
1134 "so_err %d, sb_state 0x%x, ep %p, ep_state %s", so, so->so_state,
1135 so->so_error, so->so_rcv.sb_state, ep, states[state]);
1136
1137 if (state == CONNECTING) {
1138 process_connected(ep);
1139 return;
1140 }
1141
1142 if (state == LISTEN) {
1143 struct c4iw_listen_ep *lep = (struct c4iw_listen_ep *)ep;
1144 struct socket *listen_so = so, *new_so = NULL;
1145 int error = 0;
1146
1147 SOLISTEN_LOCK(listen_so);
1148 do {
1149 error = solisten_dequeue(listen_so, &new_so,
1150 SOCK_NONBLOCK);
1151 if (error) {
1152 CTR4(KTR_IW_CXGBE, "%s: lep %p listen_so %p "
1153 "error %d", __func__, lep, listen_so,
1154 error);
1155 return;
1156 }
1157 process_newconn(lep, new_so);
1158
1159 /* solisten_dequeue() unlocks while return, so aquire
1160 * lock again for sol_qlen and also for next iteration.
1161 */
1162 SOLISTEN_LOCK(listen_so);
1163 } while (listen_so->sol_qlen);
1164 SOLISTEN_UNLOCK(listen_so);
1165
1166 return;
1167 }
1168
1169 /* connection error */
1170 if (so->so_error) {
1171 process_conn_error(ep);
1172 return;
1173 }
1174
1175 /* peer close */
1176 if ((so->so_rcv.sb_state & SBS_CANTRCVMORE) && state <= CLOSING) {
1177 process_peer_close(ep);
1178 /*
1179 * check whether socket disconnect event is pending before
1180 * returning. Fallthrough if yes.
1181 */
1182 if (!(so->so_state & SS_ISDISCONNECTED))
1183 return;
1184 }
1185
1186 /* close complete */
1187 if (so->so_state & SS_ISDISCONNECTED) {
1188 process_close_complete(ep);
1189 return;
1190 }
1191
1192 /* rx data */
1193 if (sbused(&ep->com.so->so_rcv)) {
1194 process_data(ep);
1195 return;
1196 }
1197
1198 /* Socket events for 'MPA Request Received' and 'Close Complete'
1199 * were already processed earlier in their previous events handlers.
1200 * Hence, these socket events are skipped.
1201 * And any other socket events must have handled above.
1202 */
1203 MPASS((ep->com.state == MPA_REQ_RCVD) || (ep->com.state == MORIBUND));
1204
1205 if ((ep->com.state != MPA_REQ_RCVD) && (ep->com.state != MORIBUND))
1206 log(LOG_ERR, "%s: Unprocessed socket event so %p, "
1207 "so_state 0x%x, so_err %d, sb_state 0x%x, ep %p, ep_state %s\n",
1208 __func__, so, so->so_state, so->so_error, so->so_rcv.sb_state,
1209 ep, states[state]);
1210
1211 }
1212
1213 SYSCTL_NODE(_hw, OID_AUTO, iw_cxgbe, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
1214 "iw_cxgbe driver parameters");
1215
1216 static int dack_mode = 0;
1217 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, dack_mode, CTLFLAG_RWTUN, &dack_mode, 0,
1218 "Delayed ack mode (default = 0)");
1219
1220 int c4iw_max_read_depth = 8;
1221 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, c4iw_max_read_depth, CTLFLAG_RWTUN, &c4iw_max_read_depth, 0,
1222 "Per-connection max ORD/IRD (default = 8)");
1223
1224 static int enable_tcp_timestamps;
1225 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, enable_tcp_timestamps, CTLFLAG_RWTUN, &enable_tcp_timestamps, 0,
1226 "Enable tcp timestamps (default = 0)");
1227
1228 static int enable_tcp_sack;
1229 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, enable_tcp_sack, CTLFLAG_RWTUN, &enable_tcp_sack, 0,
1230 "Enable tcp SACK (default = 0)");
1231
1232 static int enable_tcp_window_scaling = 1;
1233 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, enable_tcp_window_scaling, CTLFLAG_RWTUN, &enable_tcp_window_scaling, 0,
1234 "Enable tcp window scaling (default = 1)");
1235
1236 int c4iw_debug = 0;
1237 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, c4iw_debug, CTLFLAG_RWTUN, &c4iw_debug, 0,
1238 "Enable debug logging (default = 0)");
1239
1240 static int peer2peer = 1;
1241 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, peer2peer, CTLFLAG_RWTUN, &peer2peer, 0,
1242 "Support peer2peer ULPs (default = 1)");
1243
1244 static int p2p_type = FW_RI_INIT_P2PTYPE_READ_REQ;
1245 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, p2p_type, CTLFLAG_RWTUN, &p2p_type, 0,
1246 "RDMAP opcode to use for the RTR message: 1 = RDMA_READ 0 = RDMA_WRITE (default 1)");
1247
1248 static int ep_timeout_secs = 60;
1249 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, ep_timeout_secs, CTLFLAG_RWTUN, &ep_timeout_secs, 0,
1250 "CM Endpoint operation timeout in seconds (default = 60)");
1251
1252 static int mpa_rev = 1;
1253 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, mpa_rev, CTLFLAG_RWTUN, &mpa_rev, 0,
1254 "MPA Revision, 0 supports amso1100, 1 is RFC5044 spec compliant, 2 is IETF MPA Peer Connect Draft compliant (default = 1)");
1255
1256 static int markers_enabled;
1257 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, markers_enabled, CTLFLAG_RWTUN, &markers_enabled, 0,
1258 "Enable MPA MARKERS (default(0) = disabled)");
1259
1260 static int crc_enabled = 1;
1261 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, crc_enabled, CTLFLAG_RWTUN, &crc_enabled, 0,
1262 "Enable MPA CRC (default(1) = enabled)");
1263
1264 static int rcv_win = 256 * 1024;
1265 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, rcv_win, CTLFLAG_RWTUN, &rcv_win, 0,
1266 "TCP receive window in bytes (default = 256KB)");
1267
1268 static int snd_win = 128 * 1024;
1269 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, snd_win, CTLFLAG_RWTUN, &snd_win, 0,
1270 "TCP send window in bytes (default = 128KB)");
1271
1272 int use_dsgl = 1;
1273 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, use_dsgl, CTLFLAG_RWTUN, &use_dsgl, 0,
1274 "Use DSGL for PBL/FastReg (default=1)");
1275
1276 int inline_threshold = 128;
1277 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, inline_threshold, CTLFLAG_RWTUN, &inline_threshold, 0,
1278 "inline vs dsgl threshold (default=128)");
1279
1280 static int reuseaddr = 0;
1281 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, reuseaddr, CTLFLAG_RWTUN, &reuseaddr, 0,
1282 "Enable SO_REUSEADDR & SO_REUSEPORT socket options on all iWARP client connections(default = 0)");
1283
1284 static void
start_ep_timer(struct c4iw_ep * ep)1285 start_ep_timer(struct c4iw_ep *ep)
1286 {
1287
1288 if (timer_pending(&ep->timer)) {
1289 CTR2(KTR_IW_CXGBE, "%s: ep %p, already started", __func__, ep);
1290 printk(KERN_ERR "%s timer already started! ep %p\n", __func__,
1291 ep);
1292 return;
1293 }
1294 clear_bit(TIMEOUT, &ep->com.flags);
1295 c4iw_get_ep(&ep->com);
1296 ep->timer.expires = jiffies + ep_timeout_secs * HZ;
1297 ep->timer.data = (unsigned long)ep;
1298 ep->timer.function = ep_timeout;
1299 add_timer(&ep->timer);
1300 }
1301
1302 static int
stop_ep_timer(struct c4iw_ep * ep)1303 stop_ep_timer(struct c4iw_ep *ep)
1304 {
1305
1306 del_timer_sync(&ep->timer);
1307 if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
1308 c4iw_put_ep(&ep->com);
1309 return 0;
1310 }
1311 return 1;
1312 }
1313
1314 static void *
alloc_ep(int size,gfp_t gfp)1315 alloc_ep(int size, gfp_t gfp)
1316 {
1317 struct c4iw_ep_common *epc;
1318
1319 epc = kzalloc(size, gfp);
1320 if (epc == NULL)
1321 return (NULL);
1322
1323 kref_init(&epc->kref);
1324 mutex_init(&epc->mutex);
1325 c4iw_init_wr_wait(&epc->wr_wait);
1326
1327 return (epc);
1328 }
1329
_c4iw_free_ep(struct kref * kref)1330 void _c4iw_free_ep(struct kref *kref)
1331 {
1332 struct c4iw_ep *ep;
1333 #if defined(KTR) || defined(INVARIANTS)
1334 struct c4iw_ep_common *epc;
1335 #endif
1336
1337 ep = container_of(kref, struct c4iw_ep, com.kref);
1338 #if defined(KTR) || defined(INVARIANTS)
1339 epc = &ep->com;
1340 #endif
1341 KASSERT(!epc->entry.tqe_prev, ("%s epc %p still on req list",
1342 __func__, epc));
1343 if (test_bit(QP_REFERENCED, &ep->com.flags))
1344 deref_qp(ep);
1345 CTR4(KTR_IW_CXGBE, "%s: ep %p, history 0x%lx, flags 0x%lx",
1346 __func__, ep, epc->history, epc->flags);
1347 kfree(ep);
1348 }
1349
release_ep_resources(struct c4iw_ep * ep)1350 static void release_ep_resources(struct c4iw_ep *ep)
1351 {
1352 CTR2(KTR_IW_CXGBE, "%s:rerB %p", __func__, ep);
1353 set_bit(RELEASE_RESOURCES, &ep->com.flags);
1354 c4iw_put_ep(&ep->com);
1355 CTR2(KTR_IW_CXGBE, "%s:rerE %p", __func__, ep);
1356 }
1357
1358 static int
send_mpa_req(struct c4iw_ep * ep)1359 send_mpa_req(struct c4iw_ep *ep)
1360 {
1361 int mpalen;
1362 struct mpa_message *mpa;
1363 struct mpa_v2_conn_params mpa_v2_params;
1364 struct mbuf *m;
1365 char mpa_rev_to_use = mpa_rev;
1366 int err = 0;
1367
1368 if (ep->retry_with_mpa_v1)
1369 mpa_rev_to_use = 1;
1370 mpalen = sizeof(*mpa) + ep->plen;
1371 if (mpa_rev_to_use == 2)
1372 mpalen += sizeof(struct mpa_v2_conn_params);
1373
1374 mpa = malloc(mpalen, M_CXGBE, M_NOWAIT);
1375 if (mpa == NULL) {
1376 err = -ENOMEM;
1377 CTR3(KTR_IW_CXGBE, "%s:smr1 ep: %p , error: %d",
1378 __func__, ep, err);
1379 goto err;
1380 }
1381
1382 memset(mpa, 0, mpalen);
1383 memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
1384 mpa->flags = (crc_enabled ? MPA_CRC : 0) |
1385 (markers_enabled ? MPA_MARKERS : 0) |
1386 (mpa_rev_to_use == 2 ? MPA_ENHANCED_RDMA_CONN : 0);
1387 mpa->private_data_size = htons(ep->plen);
1388 mpa->revision = mpa_rev_to_use;
1389
1390 if (mpa_rev_to_use == 1) {
1391 ep->tried_with_mpa_v1 = 1;
1392 ep->retry_with_mpa_v1 = 0;
1393 }
1394
1395 if (mpa_rev_to_use == 2) {
1396 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
1397 sizeof(struct mpa_v2_conn_params));
1398 mpa_v2_params.ird = htons((u16)ep->ird);
1399 mpa_v2_params.ord = htons((u16)ep->ord);
1400
1401 if (peer2peer) {
1402 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
1403
1404 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE) {
1405 mpa_v2_params.ord |=
1406 htons(MPA_V2_RDMA_WRITE_RTR);
1407 } else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ) {
1408 mpa_v2_params.ord |=
1409 htons(MPA_V2_RDMA_READ_RTR);
1410 }
1411 }
1412 memcpy(mpa->private_data, &mpa_v2_params,
1413 sizeof(struct mpa_v2_conn_params));
1414
1415 if (ep->plen) {
1416
1417 memcpy(mpa->private_data +
1418 sizeof(struct mpa_v2_conn_params),
1419 ep->mpa_pkt + sizeof(*mpa), ep->plen);
1420 }
1421 } else {
1422
1423 if (ep->plen)
1424 memcpy(mpa->private_data,
1425 ep->mpa_pkt + sizeof(*mpa), ep->plen);
1426 CTR2(KTR_IW_CXGBE, "%s:smr7 %p", __func__, ep);
1427 }
1428
1429 m = m_getm(NULL, mpalen, M_NOWAIT, MT_DATA);
1430 if (m == NULL) {
1431 err = -ENOMEM;
1432 CTR3(KTR_IW_CXGBE, "%s:smr2 ep: %p , error: %d",
1433 __func__, ep, err);
1434 free(mpa, M_CXGBE);
1435 goto err;
1436 }
1437 m_copyback(m, 0, mpalen, (void *)mpa);
1438 free(mpa, M_CXGBE);
1439
1440 err = -sosend(ep->com.so, NULL, NULL, m, NULL, MSG_DONTWAIT,
1441 ep->com.thread);
1442 if (err) {
1443 CTR3(KTR_IW_CXGBE, "%s:smr3 ep: %p , error: %d",
1444 __func__, ep, err);
1445 goto err;
1446 }
1447
1448 START_EP_TIMER(ep);
1449 ep->com.state = MPA_REQ_SENT;
1450 ep->mpa_attr.initiator = 1;
1451 CTR3(KTR_IW_CXGBE, "%s:smrE %p, error: %d", __func__, ep, err);
1452 return 0;
1453 err:
1454 connect_reply_upcall(ep, err);
1455 CTR3(KTR_IW_CXGBE, "%s:smrE %p, error: %d", __func__, ep, err);
1456 return err;
1457 }
1458
send_mpa_reject(struct c4iw_ep * ep,const void * pdata,u8 plen)1459 static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen)
1460 {
1461 int mpalen ;
1462 struct mpa_message *mpa;
1463 struct mpa_v2_conn_params mpa_v2_params;
1464 struct mbuf *m;
1465 int err;
1466
1467 CTR4(KTR_IW_CXGBE, "%s:smrejB %p %u %d", __func__, ep, ep->hwtid,
1468 ep->plen);
1469
1470 mpalen = sizeof(*mpa) + plen;
1471
1472 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
1473
1474 mpalen += sizeof(struct mpa_v2_conn_params);
1475 CTR4(KTR_IW_CXGBE, "%s:smrej1 %p %u %d", __func__, ep,
1476 ep->mpa_attr.version, mpalen);
1477 }
1478
1479 mpa = malloc(mpalen, M_CXGBE, M_NOWAIT);
1480 if (mpa == NULL)
1481 return (-ENOMEM);
1482
1483 memset(mpa, 0, mpalen);
1484 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
1485 mpa->flags = MPA_REJECT;
1486 mpa->revision = mpa_rev;
1487 mpa->private_data_size = htons(plen);
1488
1489 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
1490
1491 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
1492 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
1493 sizeof(struct mpa_v2_conn_params));
1494 mpa_v2_params.ird = htons(((u16)ep->ird) |
1495 (peer2peer ? MPA_V2_PEER2PEER_MODEL :
1496 0));
1497 mpa_v2_params.ord = htons(((u16)ep->ord) | (peer2peer ?
1498 (p2p_type ==
1499 FW_RI_INIT_P2PTYPE_RDMA_WRITE ?
1500 MPA_V2_RDMA_WRITE_RTR : p2p_type ==
1501 FW_RI_INIT_P2PTYPE_READ_REQ ?
1502 MPA_V2_RDMA_READ_RTR : 0) : 0));
1503 memcpy(mpa->private_data, &mpa_v2_params,
1504 sizeof(struct mpa_v2_conn_params));
1505
1506 if (ep->plen)
1507 memcpy(mpa->private_data +
1508 sizeof(struct mpa_v2_conn_params), pdata, plen);
1509 CTR5(KTR_IW_CXGBE, "%s:smrej3 %p %d %d %d", __func__, ep,
1510 mpa_v2_params.ird, mpa_v2_params.ord, ep->plen);
1511 } else
1512 if (plen)
1513 memcpy(mpa->private_data, pdata, plen);
1514
1515 m = m_getm(NULL, mpalen, M_NOWAIT, MT_DATA);
1516 if (m == NULL) {
1517 free(mpa, M_CXGBE);
1518 return (-ENOMEM);
1519 }
1520 m_copyback(m, 0, mpalen, (void *)mpa);
1521 free(mpa, M_CXGBE);
1522
1523 err = -sosend(ep->com.so, NULL, NULL, m, NULL, MSG_DONTWAIT, ep->com.thread);
1524 if (!err)
1525 ep->snd_seq += mpalen;
1526 CTR4(KTR_IW_CXGBE, "%s:smrejE %p %u %d", __func__, ep, ep->hwtid, err);
1527 return err;
1528 }
1529
send_mpa_reply(struct c4iw_ep * ep,const void * pdata,u8 plen)1530 static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen)
1531 {
1532 int mpalen;
1533 struct mpa_message *mpa;
1534 struct mbuf *m;
1535 struct mpa_v2_conn_params mpa_v2_params;
1536 int err;
1537
1538 CTR2(KTR_IW_CXGBE, "%s:smrepB %p", __func__, ep);
1539
1540 mpalen = sizeof(*mpa) + plen;
1541
1542 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
1543
1544 CTR3(KTR_IW_CXGBE, "%s:smrep1 %p %d", __func__, ep,
1545 ep->mpa_attr.version);
1546 mpalen += sizeof(struct mpa_v2_conn_params);
1547 }
1548
1549 mpa = malloc(mpalen, M_CXGBE, M_NOWAIT);
1550 if (mpa == NULL)
1551 return (-ENOMEM);
1552
1553 memset(mpa, 0, sizeof(*mpa));
1554 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
1555 mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) |
1556 (markers_enabled ? MPA_MARKERS : 0);
1557 mpa->revision = ep->mpa_attr.version;
1558 mpa->private_data_size = htons(plen);
1559
1560 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
1561
1562 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
1563 mpa->private_data_size +=
1564 htons(sizeof(struct mpa_v2_conn_params));
1565 mpa_v2_params.ird = htons((u16)ep->ird);
1566 mpa_v2_params.ord = htons((u16)ep->ord);
1567 CTR5(KTR_IW_CXGBE, "%s:smrep3 %p %d %d %d", __func__, ep,
1568 ep->mpa_attr.version, mpa_v2_params.ird, mpa_v2_params.ord);
1569
1570 if (peer2peer && (ep->mpa_attr.p2p_type !=
1571 FW_RI_INIT_P2PTYPE_DISABLED)) {
1572
1573 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
1574
1575 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE) {
1576
1577 mpa_v2_params.ord |=
1578 htons(MPA_V2_RDMA_WRITE_RTR);
1579 CTR5(KTR_IW_CXGBE, "%s:smrep4 %p %d %d %d",
1580 __func__, ep, p2p_type, mpa_v2_params.ird,
1581 mpa_v2_params.ord);
1582 }
1583 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ) {
1584
1585 mpa_v2_params.ord |=
1586 htons(MPA_V2_RDMA_READ_RTR);
1587 CTR5(KTR_IW_CXGBE, "%s:smrep5 %p %d %d %d",
1588 __func__, ep, p2p_type, mpa_v2_params.ird,
1589 mpa_v2_params.ord);
1590 }
1591 }
1592
1593 memcpy(mpa->private_data, &mpa_v2_params,
1594 sizeof(struct mpa_v2_conn_params));
1595
1596 if (ep->plen)
1597 memcpy(mpa->private_data +
1598 sizeof(struct mpa_v2_conn_params), pdata, plen);
1599 } else
1600 if (plen)
1601 memcpy(mpa->private_data, pdata, plen);
1602
1603 m = m_getm(NULL, mpalen, M_NOWAIT, MT_DATA);
1604 if (m == NULL) {
1605 free(mpa, M_CXGBE);
1606 return (-ENOMEM);
1607 }
1608 m_copyback(m, 0, mpalen, (void *)mpa);
1609 free(mpa, M_CXGBE);
1610
1611
1612 ep->com.state = MPA_REP_SENT;
1613 ep->snd_seq += mpalen;
1614 err = -sosend(ep->com.so, NULL, NULL, m, NULL, MSG_DONTWAIT,
1615 ep->com.thread);
1616 CTR3(KTR_IW_CXGBE, "%s:smrepE %p %d", __func__, ep, err);
1617 return err;
1618 }
1619
1620
1621
close_complete_upcall(struct c4iw_ep * ep,int status)1622 static void close_complete_upcall(struct c4iw_ep *ep, int status)
1623 {
1624 struct iw_cm_event event;
1625
1626 CTR2(KTR_IW_CXGBE, "%s:ccuB %p", __func__, ep);
1627 memset(&event, 0, sizeof(event));
1628 event.event = IW_CM_EVENT_CLOSE;
1629 event.status = status;
1630
1631 if (ep->com.cm_id) {
1632
1633 CTR2(KTR_IW_CXGBE, "%s:ccu1 %1", __func__, ep);
1634 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1635 deref_cm_id(&ep->com);
1636 set_bit(CLOSE_UPCALL, &ep->com.history);
1637 }
1638 CTR2(KTR_IW_CXGBE, "%s:ccuE %p", __func__, ep);
1639 }
1640
1641 static int
send_abort(struct c4iw_ep * ep)1642 send_abort(struct c4iw_ep *ep)
1643 {
1644 struct socket *so = ep->com.so;
1645 struct sockopt sopt;
1646 int rc;
1647 struct linger l;
1648
1649 CTR5(KTR_IW_CXGBE, "%s ep %p so %p state %s tid %d", __func__, ep, so,
1650 states[ep->com.state], ep->hwtid);
1651
1652 l.l_onoff = 1;
1653 l.l_linger = 0;
1654
1655 /* linger_time of 0 forces RST to be sent */
1656 sopt.sopt_dir = SOPT_SET;
1657 sopt.sopt_level = SOL_SOCKET;
1658 sopt.sopt_name = SO_LINGER;
1659 sopt.sopt_val = (caddr_t)&l;
1660 sopt.sopt_valsize = sizeof l;
1661 sopt.sopt_td = NULL;
1662 rc = -sosetopt(so, &sopt);
1663 if (rc != 0) {
1664 log(LOG_ERR, "%s: sosetopt(%p, linger = 0) failed with %d.\n",
1665 __func__, so, rc);
1666 }
1667
1668 uninit_iwarp_socket(so);
1669 soclose(so);
1670 set_bit(ABORT_CONN, &ep->com.history);
1671
1672 /*
1673 * TBD: iw_cxgbe driver should receive ABORT reply for every ABORT
1674 * request it has sent. But the current TOE driver is not propagating
1675 * this ABORT reply event (via do_abort_rpl) to iw_cxgbe. So as a work-
1676 * around de-refererece 'ep' here instead of doing it in abort_rpl()
1677 * handler(not yet implemented) of iw_cxgbe driver.
1678 */
1679 release_ep_resources(ep);
1680 ep->com.state = DEAD;
1681
1682 return (0);
1683 }
1684
peer_close_upcall(struct c4iw_ep * ep)1685 static void peer_close_upcall(struct c4iw_ep *ep)
1686 {
1687 struct iw_cm_event event;
1688
1689 CTR2(KTR_IW_CXGBE, "%s:pcuB %p", __func__, ep);
1690 memset(&event, 0, sizeof(event));
1691 event.event = IW_CM_EVENT_DISCONNECT;
1692
1693 if (ep->com.cm_id) {
1694
1695 CTR2(KTR_IW_CXGBE, "%s:pcu1 %p", __func__, ep);
1696 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1697 set_bit(DISCONN_UPCALL, &ep->com.history);
1698 }
1699 CTR2(KTR_IW_CXGBE, "%s:pcuE %p", __func__, ep);
1700 }
1701
peer_abort_upcall(struct c4iw_ep * ep)1702 static void peer_abort_upcall(struct c4iw_ep *ep)
1703 {
1704 struct iw_cm_event event;
1705
1706 CTR2(KTR_IW_CXGBE, "%s:pauB %p", __func__, ep);
1707 memset(&event, 0, sizeof(event));
1708 event.event = IW_CM_EVENT_CLOSE;
1709 event.status = -ECONNRESET;
1710
1711 if (ep->com.cm_id) {
1712
1713 CTR2(KTR_IW_CXGBE, "%s:pau1 %p", __func__, ep);
1714 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1715 deref_cm_id(&ep->com);
1716 set_bit(ABORT_UPCALL, &ep->com.history);
1717 }
1718 CTR2(KTR_IW_CXGBE, "%s:pauE %p", __func__, ep);
1719 }
1720
connect_reply_upcall(struct c4iw_ep * ep,int status)1721 static void connect_reply_upcall(struct c4iw_ep *ep, int status)
1722 {
1723 struct iw_cm_event event;
1724
1725 CTR3(KTR_IW_CXGBE, "%s:cruB %p, status: %d", __func__, ep, status);
1726 memset(&event, 0, sizeof(event));
1727 event.event = IW_CM_EVENT_CONNECT_REPLY;
1728 event.status = ((status == -ECONNABORTED) || (status == -EPIPE)) ?
1729 -ECONNRESET : status;
1730 event.local_addr = ep->com.local_addr;
1731 event.remote_addr = ep->com.remote_addr;
1732
1733 if ((status == 0) || (status == -ECONNREFUSED)) {
1734
1735 if (!ep->tried_with_mpa_v1) {
1736
1737 CTR2(KTR_IW_CXGBE, "%s:cru1 %p", __func__, ep);
1738 /* this means MPA_v2 is used */
1739 event.ord = ep->ird;
1740 event.ird = ep->ord;
1741 event.private_data_len = ep->plen -
1742 sizeof(struct mpa_v2_conn_params);
1743 event.private_data = ep->mpa_pkt +
1744 sizeof(struct mpa_message) +
1745 sizeof(struct mpa_v2_conn_params);
1746 } else {
1747
1748 CTR2(KTR_IW_CXGBE, "%s:cru2 %p", __func__, ep);
1749 /* this means MPA_v1 is used */
1750 event.ord = c4iw_max_read_depth;
1751 event.ird = c4iw_max_read_depth;
1752 event.private_data_len = ep->plen;
1753 event.private_data = ep->mpa_pkt +
1754 sizeof(struct mpa_message);
1755 }
1756 }
1757
1758 if (ep->com.cm_id) {
1759
1760 CTR2(KTR_IW_CXGBE, "%s:cru3 %p", __func__, ep);
1761 set_bit(CONN_RPL_UPCALL, &ep->com.history);
1762 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1763 }
1764
1765 if(status == -ECONNABORTED) {
1766
1767 CTR3(KTR_IW_CXGBE, "%s:cruE %p %d", __func__, ep, status);
1768 return;
1769 }
1770
1771 if (status < 0) {
1772
1773 CTR3(KTR_IW_CXGBE, "%s:cru4 %p %d", __func__, ep, status);
1774 deref_cm_id(&ep->com);
1775 }
1776
1777 CTR2(KTR_IW_CXGBE, "%s:cruE %p", __func__, ep);
1778 }
1779
connect_request_upcall(struct c4iw_ep * ep)1780 static int connect_request_upcall(struct c4iw_ep *ep)
1781 {
1782 struct iw_cm_event event;
1783 int ret;
1784
1785 CTR3(KTR_IW_CXGBE, "%s: ep %p, mpa_v1 %d", __func__, ep,
1786 ep->tried_with_mpa_v1);
1787
1788 memset(&event, 0, sizeof(event));
1789 event.event = IW_CM_EVENT_CONNECT_REQUEST;
1790 event.local_addr = ep->com.local_addr;
1791 event.remote_addr = ep->com.remote_addr;
1792 event.provider_data = ep;
1793
1794 if (!ep->tried_with_mpa_v1) {
1795 /* this means MPA_v2 is used */
1796 event.ord = ep->ord;
1797 event.ird = ep->ird;
1798 event.private_data_len = ep->plen -
1799 sizeof(struct mpa_v2_conn_params);
1800 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message) +
1801 sizeof(struct mpa_v2_conn_params);
1802 } else {
1803
1804 /* this means MPA_v1 is used. Send max supported */
1805 event.ord = c4iw_max_read_depth;
1806 event.ird = c4iw_max_read_depth;
1807 event.private_data_len = ep->plen;
1808 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
1809 }
1810
1811 c4iw_get_ep(&ep->com);
1812 ret = ep->parent_ep->com.cm_id->event_handler(ep->parent_ep->com.cm_id,
1813 &event);
1814 if(ret) {
1815 CTR3(KTR_IW_CXGBE, "%s: ep %p, Failure while notifying event to"
1816 " IWCM, err:%d", __func__, ep, ret);
1817 c4iw_put_ep(&ep->com);
1818 } else
1819 /* Dereference parent_ep only in success case.
1820 * In case of failure, parent_ep is dereferenced by the caller
1821 * of process_mpa_request().
1822 */
1823 c4iw_put_ep(&ep->parent_ep->com);
1824
1825 set_bit(CONNREQ_UPCALL, &ep->com.history);
1826 return ret;
1827 }
1828
established_upcall(struct c4iw_ep * ep)1829 static void established_upcall(struct c4iw_ep *ep)
1830 {
1831 struct iw_cm_event event;
1832
1833 CTR2(KTR_IW_CXGBE, "%s:euB %p", __func__, ep);
1834 memset(&event, 0, sizeof(event));
1835 event.event = IW_CM_EVENT_ESTABLISHED;
1836 event.ird = ep->ord;
1837 event.ord = ep->ird;
1838
1839 if (ep->com.cm_id) {
1840
1841 CTR2(KTR_IW_CXGBE, "%s:eu1 %p", __func__, ep);
1842 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1843 set_bit(ESTAB_UPCALL, &ep->com.history);
1844 }
1845 CTR2(KTR_IW_CXGBE, "%s:euE %p", __func__, ep);
1846 }
1847
1848
1849 #define RELAXED_IRD_NEGOTIATION 1
1850
1851 /*
1852 * process_mpa_reply - process streaming mode MPA reply
1853 *
1854 * Returns:
1855 *
1856 * 0 upon success indicating a connect request was delivered to the ULP
1857 * or the mpa request is incomplete but valid so far.
1858 *
1859 * 1 if a failure requires the caller to close the connection.
1860 *
1861 * 2 if a failure requires the caller to abort the connection.
1862 */
process_mpa_reply(struct c4iw_ep * ep)1863 static int process_mpa_reply(struct c4iw_ep *ep)
1864 {
1865 struct mpa_message *mpa;
1866 struct mpa_v2_conn_params *mpa_v2_params;
1867 u16 plen;
1868 u16 resp_ird, resp_ord;
1869 u8 rtr_mismatch = 0, insuff_ird = 0;
1870 struct c4iw_qp_attributes attrs = {0};
1871 enum c4iw_qp_attr_mask mask;
1872 int err;
1873 struct mbuf *top, *m;
1874 int flags = MSG_DONTWAIT;
1875 struct uio uio;
1876 int disconnect = 0;
1877
1878 CTR2(KTR_IW_CXGBE, "%s:pmrB %p", __func__, ep);
1879
1880 /*
1881 * Stop mpa timer. If it expired, then
1882 * we ignore the MPA reply. process_timeout()
1883 * will abort the connection.
1884 */
1885 if (STOP_EP_TIMER(ep))
1886 return 0;
1887
1888 uio.uio_resid = 1000000;
1889 uio.uio_td = ep->com.thread;
1890 err = soreceive(ep->com.so, NULL, &uio, &top, NULL, &flags);
1891
1892 if (err) {
1893
1894 if (err == EWOULDBLOCK) {
1895
1896 CTR2(KTR_IW_CXGBE, "%s:pmr1 %p", __func__, ep);
1897 START_EP_TIMER(ep);
1898 return 0;
1899 }
1900 err = -err;
1901 CTR2(KTR_IW_CXGBE, "%s:pmr2 %p", __func__, ep);
1902 goto err;
1903 }
1904
1905 if (ep->com.so->so_rcv.sb_mb) {
1906
1907 CTR2(KTR_IW_CXGBE, "%s:pmr3 %p", __func__, ep);
1908 printf("%s data after soreceive called! so %p sb_mb %p top %p\n",
1909 __func__, ep->com.so, ep->com.so->so_rcv.sb_mb, top);
1910 }
1911
1912 m = top;
1913
1914 do {
1915
1916 CTR2(KTR_IW_CXGBE, "%s:pmr4 %p", __func__, ep);
1917 /*
1918 * If we get more than the supported amount of private data
1919 * then we must fail this connection.
1920 */
1921 if (ep->mpa_pkt_len + m->m_len > sizeof(ep->mpa_pkt)) {
1922
1923 CTR3(KTR_IW_CXGBE, "%s:pmr5 %p %d", __func__, ep,
1924 ep->mpa_pkt_len + m->m_len);
1925 err = (-EINVAL);
1926 goto err_stop_timer;
1927 }
1928
1929 /*
1930 * copy the new data into our accumulation buffer.
1931 */
1932 m_copydata(m, 0, m->m_len, &(ep->mpa_pkt[ep->mpa_pkt_len]));
1933 ep->mpa_pkt_len += m->m_len;
1934 if (!m->m_next)
1935 m = m->m_nextpkt;
1936 else
1937 m = m->m_next;
1938 } while (m);
1939
1940 m_freem(top);
1941 /*
1942 * if we don't even have the mpa message, then bail.
1943 */
1944 if (ep->mpa_pkt_len < sizeof(*mpa)) {
1945 return 0;
1946 }
1947 mpa = (struct mpa_message *) ep->mpa_pkt;
1948
1949 /* Validate MPA header. */
1950 if (mpa->revision > mpa_rev) {
1951
1952 CTR4(KTR_IW_CXGBE, "%s:pmr6 %p %d %d", __func__, ep,
1953 mpa->revision, mpa_rev);
1954 printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d, "
1955 " Received = %d\n", __func__, mpa_rev, mpa->revision);
1956 err = -EPROTO;
1957 goto err_stop_timer;
1958 }
1959
1960 if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
1961
1962 CTR2(KTR_IW_CXGBE, "%s:pmr7 %p", __func__, ep);
1963 err = -EPROTO;
1964 goto err_stop_timer;
1965 }
1966
1967 plen = ntohs(mpa->private_data_size);
1968
1969 /*
1970 * Fail if there's too much private data.
1971 */
1972 if (plen > MPA_MAX_PRIVATE_DATA) {
1973
1974 CTR2(KTR_IW_CXGBE, "%s:pmr8 %p", __func__, ep);
1975 err = -EPROTO;
1976 goto err_stop_timer;
1977 }
1978
1979 /*
1980 * If plen does not account for pkt size
1981 */
1982 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1983
1984 CTR2(KTR_IW_CXGBE, "%s:pmr9 %p", __func__, ep);
1985 STOP_EP_TIMER(ep);
1986 err = -EPROTO;
1987 goto err_stop_timer;
1988 }
1989
1990 ep->plen = (u8) plen;
1991
1992 /*
1993 * If we don't have all the pdata yet, then bail.
1994 * We'll continue process when more data arrives.
1995 */
1996 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen)) {
1997
1998 CTR2(KTR_IW_CXGBE, "%s:pmra %p", __func__, ep);
1999 return 0;
2000 }
2001
2002 if (mpa->flags & MPA_REJECT) {
2003
2004 CTR2(KTR_IW_CXGBE, "%s:pmrb %p", __func__, ep);
2005 err = -ECONNREFUSED;
2006 goto err_stop_timer;
2007 }
2008
2009 /*
2010 * If we get here we have accumulated the entire mpa
2011 * start reply message including private data. And
2012 * the MPA header is valid.
2013 */
2014 ep->com.state = FPDU_MODE;
2015 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
2016 ep->mpa_attr.recv_marker_enabled = markers_enabled;
2017 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
2018 ep->mpa_attr.version = mpa->revision;
2019 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
2020
2021 if (mpa->revision == 2) {
2022
2023 CTR2(KTR_IW_CXGBE, "%s:pmrc %p", __func__, ep);
2024 ep->mpa_attr.enhanced_rdma_conn =
2025 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
2026
2027 if (ep->mpa_attr.enhanced_rdma_conn) {
2028
2029 CTR2(KTR_IW_CXGBE, "%s:pmrd %p", __func__, ep);
2030 mpa_v2_params = (struct mpa_v2_conn_params *)
2031 (ep->mpa_pkt + sizeof(*mpa));
2032 resp_ird = ntohs(mpa_v2_params->ird) &
2033 MPA_V2_IRD_ORD_MASK;
2034 resp_ord = ntohs(mpa_v2_params->ord) &
2035 MPA_V2_IRD_ORD_MASK;
2036
2037 /*
2038 * This is a double-check. Ideally, below checks are
2039 * not required since ird/ord stuff has been taken
2040 * care of in c4iw_accept_cr
2041 */
2042 if (ep->ird < resp_ord) {
2043 if (RELAXED_IRD_NEGOTIATION && resp_ord <=
2044 ep->com.dev->rdev.adap->params.max_ordird_qp)
2045 ep->ird = resp_ord;
2046 else
2047 insuff_ird = 1;
2048 } else if (ep->ird > resp_ord) {
2049 ep->ird = resp_ord;
2050 }
2051 if (ep->ord > resp_ird) {
2052 if (RELAXED_IRD_NEGOTIATION)
2053 ep->ord = resp_ird;
2054 else
2055 insuff_ird = 1;
2056 }
2057 if (insuff_ird) {
2058 err = -ENOMEM;
2059 ep->ird = resp_ord;
2060 ep->ord = resp_ird;
2061 }
2062
2063 if (ntohs(mpa_v2_params->ird) &
2064 MPA_V2_PEER2PEER_MODEL) {
2065
2066 CTR2(KTR_IW_CXGBE, "%s:pmrf %p", __func__, ep);
2067 if (ntohs(mpa_v2_params->ord) &
2068 MPA_V2_RDMA_WRITE_RTR) {
2069
2070 CTR2(KTR_IW_CXGBE, "%s:pmrg %p", __func__, ep);
2071 ep->mpa_attr.p2p_type =
2072 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
2073 }
2074 else if (ntohs(mpa_v2_params->ord) &
2075 MPA_V2_RDMA_READ_RTR) {
2076
2077 CTR2(KTR_IW_CXGBE, "%s:pmrh %p", __func__, ep);
2078 ep->mpa_attr.p2p_type =
2079 FW_RI_INIT_P2PTYPE_READ_REQ;
2080 }
2081 }
2082 }
2083 } else {
2084
2085 CTR2(KTR_IW_CXGBE, "%s:pmri %p", __func__, ep);
2086
2087 if (mpa->revision == 1) {
2088
2089 CTR2(KTR_IW_CXGBE, "%s:pmrj %p", __func__, ep);
2090
2091 if (peer2peer) {
2092
2093 CTR2(KTR_IW_CXGBE, "%s:pmrk %p", __func__, ep);
2094 ep->mpa_attr.p2p_type = p2p_type;
2095 }
2096 }
2097 }
2098
2099 if (set_tcpinfo(ep)) {
2100
2101 CTR2(KTR_IW_CXGBE, "%s:pmrl %p", __func__, ep);
2102 printf("%s set_tcpinfo error\n", __func__);
2103 err = -ECONNRESET;
2104 goto err;
2105 }
2106
2107 CTR6(KTR_IW_CXGBE, "%s - crc_enabled = %d, recv_marker_enabled = %d, "
2108 "xmit_marker_enabled = %d, version = %d p2p_type = %d", __func__,
2109 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
2110 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
2111 ep->mpa_attr.p2p_type);
2112
2113 /*
2114 * If responder's RTR does not match with that of initiator, assign
2115 * FW_RI_INIT_P2PTYPE_DISABLED in mpa attributes so that RTR is not
2116 * generated when moving QP to RTS state.
2117 * A TERM message will be sent after QP has moved to RTS state
2118 */
2119 if ((ep->mpa_attr.version == 2) && peer2peer &&
2120 (ep->mpa_attr.p2p_type != p2p_type)) {
2121
2122 CTR2(KTR_IW_CXGBE, "%s:pmrm %p", __func__, ep);
2123 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
2124 rtr_mismatch = 1;
2125 }
2126
2127
2128 //ep->ofld_txq = TOEPCB(ep->com.so)->ofld_txq;
2129 attrs.mpa_attr = ep->mpa_attr;
2130 attrs.max_ird = ep->ird;
2131 attrs.max_ord = ep->ord;
2132 attrs.llp_stream_handle = ep;
2133 attrs.next_state = C4IW_QP_STATE_RTS;
2134
2135 mask = C4IW_QP_ATTR_NEXT_STATE |
2136 C4IW_QP_ATTR_LLP_STREAM_HANDLE | C4IW_QP_ATTR_MPA_ATTR |
2137 C4IW_QP_ATTR_MAX_IRD | C4IW_QP_ATTR_MAX_ORD;
2138
2139 /* bind QP and TID with INIT_WR */
2140 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp, mask, &attrs, 1);
2141
2142 if (err) {
2143
2144 CTR2(KTR_IW_CXGBE, "%s:pmrn %p", __func__, ep);
2145 goto err;
2146 }
2147
2148 /*
2149 * If responder's RTR requirement did not match with what initiator
2150 * supports, generate TERM message
2151 */
2152 if (rtr_mismatch) {
2153
2154 CTR2(KTR_IW_CXGBE, "%s:pmro %p", __func__, ep);
2155 printk(KERN_ERR "%s: RTR mismatch, sending TERM\n", __func__);
2156 attrs.layer_etype = LAYER_MPA | DDP_LLP;
2157 attrs.ecode = MPA_NOMATCH_RTR;
2158 attrs.next_state = C4IW_QP_STATE_TERMINATE;
2159 attrs.send_term = 1;
2160 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2161 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2162 err = -ENOMEM;
2163 disconnect = 1;
2164 goto out;
2165 }
2166
2167 /*
2168 * Generate TERM if initiator IRD is not sufficient for responder
2169 * provided ORD. Currently, we do the same behaviour even when
2170 * responder provided IRD is also not sufficient as regards to
2171 * initiator ORD.
2172 */
2173 if (insuff_ird) {
2174
2175 CTR2(KTR_IW_CXGBE, "%s:pmrp %p", __func__, ep);
2176 printk(KERN_ERR "%s: Insufficient IRD, sending TERM\n",
2177 __func__);
2178 attrs.layer_etype = LAYER_MPA | DDP_LLP;
2179 attrs.ecode = MPA_INSUFF_IRD;
2180 attrs.next_state = C4IW_QP_STATE_TERMINATE;
2181 attrs.send_term = 1;
2182 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2183 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2184 err = -ENOMEM;
2185 disconnect = 1;
2186 goto out;
2187 }
2188 goto out;
2189 err_stop_timer:
2190 STOP_EP_TIMER(ep);
2191 err:
2192 disconnect = 2;
2193 out:
2194 connect_reply_upcall(ep, err);
2195 CTR2(KTR_IW_CXGBE, "%s:pmrE %p", __func__, ep);
2196 return disconnect;
2197 }
2198
2199 /*
2200 * process_mpa_request - process streaming mode MPA request
2201 *
2202 * Returns:
2203 *
2204 * 0 upon success indicating a connect request was delivered to the ULP
2205 * or the mpa request is incomplete but valid so far.
2206 *
2207 * 1 if a failure requires the caller to close the connection.
2208 *
2209 * 2 if a failure requires the caller to abort the connection.
2210 */
2211 static int
process_mpa_request(struct c4iw_ep * ep)2212 process_mpa_request(struct c4iw_ep *ep)
2213 {
2214 struct mpa_message *mpa;
2215 struct mpa_v2_conn_params *mpa_v2_params;
2216 u16 plen;
2217 int flags = MSG_DONTWAIT;
2218 int rc;
2219 struct iovec iov;
2220 struct uio uio;
2221 enum c4iw_ep_state state = ep->com.state;
2222
2223 CTR3(KTR_IW_CXGBE, "%s: ep %p, state %s", __func__, ep, states[state]);
2224
2225 if (state != MPA_REQ_WAIT)
2226 return 0;
2227
2228 iov.iov_base = &ep->mpa_pkt[ep->mpa_pkt_len];
2229 iov.iov_len = sizeof(ep->mpa_pkt) - ep->mpa_pkt_len;
2230 uio.uio_iov = &iov;
2231 uio.uio_iovcnt = 1;
2232 uio.uio_offset = 0;
2233 uio.uio_resid = sizeof(ep->mpa_pkt) - ep->mpa_pkt_len;
2234 uio.uio_segflg = UIO_SYSSPACE;
2235 uio.uio_rw = UIO_READ;
2236 uio.uio_td = NULL; /* uio.uio_td = ep->com.thread; */
2237
2238 rc = soreceive(ep->com.so, NULL, &uio, NULL, NULL, &flags);
2239 if (rc == EAGAIN)
2240 return 0;
2241 else if (rc)
2242 goto err_stop_timer;
2243
2244 KASSERT(uio.uio_offset > 0, ("%s: sorecieve on so %p read no data",
2245 __func__, ep->com.so));
2246 ep->mpa_pkt_len += uio.uio_offset;
2247
2248 /*
2249 * If we get more than the supported amount of private data then we must
2250 * fail this connection. XXX: check so_rcv->sb_cc, or peek with another
2251 * soreceive, or increase the size of mpa_pkt by 1 and abort if the last
2252 * byte is filled by the soreceive above.
2253 */
2254
2255 /* Don't even have the MPA message. Wait for more data to arrive. */
2256 if (ep->mpa_pkt_len < sizeof(*mpa))
2257 return 0;
2258 mpa = (struct mpa_message *) ep->mpa_pkt;
2259
2260 /*
2261 * Validate MPA Header.
2262 */
2263 if (mpa->revision > mpa_rev) {
2264 log(LOG_ERR, "%s: MPA version mismatch. Local = %d,"
2265 " Received = %d\n", __func__, mpa_rev, mpa->revision);
2266 goto err_stop_timer;
2267 }
2268
2269 if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key)))
2270 goto err_stop_timer;
2271
2272 /*
2273 * Fail if there's too much private data.
2274 */
2275 plen = ntohs(mpa->private_data_size);
2276 if (plen > MPA_MAX_PRIVATE_DATA)
2277 goto err_stop_timer;
2278
2279 /*
2280 * If plen does not account for pkt size
2281 */
2282 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen))
2283 goto err_stop_timer;
2284
2285 ep->plen = (u8) plen;
2286
2287 /*
2288 * If we don't have all the pdata yet, then bail.
2289 */
2290 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
2291 return 0;
2292
2293 /*
2294 * If we get here we have accumulated the entire mpa
2295 * start reply message including private data.
2296 */
2297 ep->mpa_attr.initiator = 0;
2298 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
2299 ep->mpa_attr.recv_marker_enabled = markers_enabled;
2300 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
2301 ep->mpa_attr.version = mpa->revision;
2302 if (mpa->revision == 1)
2303 ep->tried_with_mpa_v1 = 1;
2304 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
2305
2306 if (mpa->revision == 2) {
2307 ep->mpa_attr.enhanced_rdma_conn =
2308 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
2309 if (ep->mpa_attr.enhanced_rdma_conn) {
2310 mpa_v2_params = (struct mpa_v2_conn_params *)
2311 (ep->mpa_pkt + sizeof(*mpa));
2312 ep->ird = ntohs(mpa_v2_params->ird) &
2313 MPA_V2_IRD_ORD_MASK;
2314 ep->ird = min_t(u32, ep->ird,
2315 cur_max_read_depth(ep->com.dev));
2316 ep->ord = ntohs(mpa_v2_params->ord) &
2317 MPA_V2_IRD_ORD_MASK;
2318 ep->ord = min_t(u32, ep->ord,
2319 cur_max_read_depth(ep->com.dev));
2320 CTR3(KTR_IW_CXGBE, "%s initiator ird %u ord %u",
2321 __func__, ep->ird, ep->ord);
2322 if (ntohs(mpa_v2_params->ird) & MPA_V2_PEER2PEER_MODEL)
2323 if (peer2peer) {
2324 if (ntohs(mpa_v2_params->ord) &
2325 MPA_V2_RDMA_WRITE_RTR)
2326 ep->mpa_attr.p2p_type =
2327 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
2328 else if (ntohs(mpa_v2_params->ord) &
2329 MPA_V2_RDMA_READ_RTR)
2330 ep->mpa_attr.p2p_type =
2331 FW_RI_INIT_P2PTYPE_READ_REQ;
2332 }
2333 }
2334 } else if (mpa->revision == 1 && peer2peer)
2335 ep->mpa_attr.p2p_type = p2p_type;
2336
2337 if (set_tcpinfo(ep))
2338 goto err_stop_timer;
2339
2340 CTR5(KTR_IW_CXGBE, "%s: crc_enabled = %d, recv_marker_enabled = %d, "
2341 "xmit_marker_enabled = %d, version = %d", __func__,
2342 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
2343 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version);
2344
2345 ep->com.state = MPA_REQ_RCVD;
2346 STOP_EP_TIMER(ep);
2347
2348 /* drive upcall */
2349 if (ep->parent_ep->com.state != DEAD)
2350 if (connect_request_upcall(ep))
2351 goto err_out;
2352 return 0;
2353
2354 err_stop_timer:
2355 STOP_EP_TIMER(ep);
2356 err_out:
2357 return 2;
2358 }
2359
2360 /*
2361 * Upcall from the adapter indicating data has been transmitted.
2362 * For us its just the single MPA request or reply. We can now free
2363 * the skb holding the mpa message.
2364 */
c4iw_reject_cr(struct iw_cm_id * cm_id,const void * pdata,u8 pdata_len)2365 int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
2366 {
2367 #ifdef KTR
2368 int err;
2369 #endif
2370 struct c4iw_ep *ep = to_ep(cm_id);
2371 int abort = 0;
2372
2373 mutex_lock(&ep->com.mutex);
2374 CTR2(KTR_IW_CXGBE, "%s:crcB %p", __func__, ep);
2375
2376 if ((ep->com.state == DEAD) ||
2377 (ep->com.state != MPA_REQ_RCVD)) {
2378
2379 CTR2(KTR_IW_CXGBE, "%s:crc1 %p", __func__, ep);
2380 mutex_unlock(&ep->com.mutex);
2381 c4iw_put_ep(&ep->com);
2382 return -ECONNRESET;
2383 }
2384 set_bit(ULP_REJECT, &ep->com.history);
2385
2386 if (mpa_rev == 0) {
2387
2388 CTR2(KTR_IW_CXGBE, "%s:crc2 %p", __func__, ep);
2389 abort = 1;
2390 }
2391 else {
2392
2393 CTR2(KTR_IW_CXGBE, "%s:crc3 %p", __func__, ep);
2394 abort = send_mpa_reject(ep, pdata, pdata_len);
2395 }
2396 STOP_EP_TIMER(ep);
2397 #ifdef KTR
2398 err = c4iw_ep_disconnect(ep, abort != 0, GFP_KERNEL);
2399 #else
2400 c4iw_ep_disconnect(ep, abort != 0, GFP_KERNEL);
2401 #endif
2402 mutex_unlock(&ep->com.mutex);
2403 c4iw_put_ep(&ep->com);
2404 CTR3(KTR_IW_CXGBE, "%s:crc4 %p, err: %d", __func__, ep, err);
2405 return 0;
2406 }
2407
c4iw_accept_cr(struct iw_cm_id * cm_id,struct iw_cm_conn_param * conn_param)2408 int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2409 {
2410 int err;
2411 struct c4iw_qp_attributes attrs = {0};
2412 enum c4iw_qp_attr_mask mask;
2413 struct c4iw_ep *ep = to_ep(cm_id);
2414 struct c4iw_dev *h = to_c4iw_dev(cm_id->device);
2415 struct c4iw_qp *qp = get_qhp(h, conn_param->qpn);
2416 int abort = 0;
2417
2418 mutex_lock(&ep->com.mutex);
2419 CTR2(KTR_IW_CXGBE, "%s:cacB %p", __func__, ep);
2420
2421 if ((ep->com.state == DEAD) ||
2422 (ep->com.state != MPA_REQ_RCVD)) {
2423
2424 CTR2(KTR_IW_CXGBE, "%s:cac1 %p", __func__, ep);
2425 err = -ECONNRESET;
2426 goto err_out;
2427 }
2428
2429 BUG_ON(!qp);
2430
2431 set_bit(ULP_ACCEPT, &ep->com.history);
2432
2433 if ((conn_param->ord > c4iw_max_read_depth) ||
2434 (conn_param->ird > c4iw_max_read_depth)) {
2435
2436 CTR2(KTR_IW_CXGBE, "%s:cac2 %p", __func__, ep);
2437 err = -EINVAL;
2438 goto err_abort;
2439 }
2440
2441 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
2442
2443 CTR2(KTR_IW_CXGBE, "%s:cac3 %p", __func__, ep);
2444
2445 if (conn_param->ord > ep->ird) {
2446 if (RELAXED_IRD_NEGOTIATION) {
2447 conn_param->ord = ep->ird;
2448 } else {
2449 ep->ird = conn_param->ird;
2450 ep->ord = conn_param->ord;
2451 send_mpa_reject(ep, conn_param->private_data,
2452 conn_param->private_data_len);
2453 err = -ENOMEM;
2454 goto err_abort;
2455 }
2456 }
2457 if (conn_param->ird < ep->ord) {
2458 if (RELAXED_IRD_NEGOTIATION &&
2459 ep->ord <= h->rdev.adap->params.max_ordird_qp) {
2460 conn_param->ird = ep->ord;
2461 } else {
2462 err = -ENOMEM;
2463 goto err_abort;
2464 }
2465 }
2466 }
2467 ep->ird = conn_param->ird;
2468 ep->ord = conn_param->ord;
2469
2470 if (ep->mpa_attr.version == 1) {
2471 if (peer2peer && ep->ird == 0)
2472 ep->ird = 1;
2473 } else {
2474 if (peer2peer &&
2475 (ep->mpa_attr.p2p_type != FW_RI_INIT_P2PTYPE_DISABLED) &&
2476 (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ) && ep->ird == 0)
2477 ep->ird = 1;
2478 }
2479
2480 CTR4(KTR_IW_CXGBE, "%s %d ird %d ord %d", __func__, __LINE__,
2481 ep->ird, ep->ord);
2482
2483 ep->com.cm_id = cm_id;
2484 ref_cm_id(&ep->com);
2485 ep->com.qp = qp;
2486 ref_qp(ep);
2487 //ep->ofld_txq = TOEPCB(ep->com.so)->ofld_txq;
2488
2489 /* bind QP to EP and move to RTS */
2490 attrs.mpa_attr = ep->mpa_attr;
2491 attrs.max_ird = ep->ird;
2492 attrs.max_ord = ep->ord;
2493 attrs.llp_stream_handle = ep;
2494 attrs.next_state = C4IW_QP_STATE_RTS;
2495
2496 /* bind QP and TID with INIT_WR */
2497 mask = C4IW_QP_ATTR_NEXT_STATE |
2498 C4IW_QP_ATTR_LLP_STREAM_HANDLE |
2499 C4IW_QP_ATTR_MPA_ATTR |
2500 C4IW_QP_ATTR_MAX_IRD |
2501 C4IW_QP_ATTR_MAX_ORD;
2502
2503 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp, mask, &attrs, 1);
2504 if (err) {
2505 CTR3(KTR_IW_CXGBE, "%s:caca %p, err: %d", __func__, ep, err);
2506 goto err_defef_cm_id;
2507 }
2508
2509 err = send_mpa_reply(ep, conn_param->private_data,
2510 conn_param->private_data_len);
2511 if (err) {
2512 CTR3(KTR_IW_CXGBE, "%s:cacb %p, err: %d", __func__, ep, err);
2513 goto err_defef_cm_id;
2514 }
2515
2516 ep->com.state = FPDU_MODE;
2517 established_upcall(ep);
2518 mutex_unlock(&ep->com.mutex);
2519 c4iw_put_ep(&ep->com);
2520 CTR2(KTR_IW_CXGBE, "%s:cacE %p", __func__, ep);
2521 return 0;
2522 err_defef_cm_id:
2523 deref_cm_id(&ep->com);
2524 err_abort:
2525 abort = 1;
2526 err_out:
2527 if (abort)
2528 c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
2529 mutex_unlock(&ep->com.mutex);
2530 c4iw_put_ep(&ep->com);
2531 CTR2(KTR_IW_CXGBE, "%s:cacE err %p", __func__, ep);
2532 return err;
2533 }
2534
2535 static int
c4iw_sock_create(struct sockaddr_storage * laddr,struct socket ** so)2536 c4iw_sock_create(struct sockaddr_storage *laddr, struct socket **so)
2537 {
2538 int ret;
2539 int size, on;
2540 struct socket *sock = NULL;
2541 struct sockopt sopt;
2542
2543 ret = sock_create_kern(laddr->ss_family,
2544 SOCK_STREAM, IPPROTO_TCP, &sock);
2545 if (ret) {
2546 CTR2(KTR_IW_CXGBE, "%s:Failed to create TCP socket. err %d",
2547 __func__, ret);
2548 return ret;
2549 }
2550
2551 if (reuseaddr) {
2552 bzero(&sopt, sizeof(struct sockopt));
2553 sopt.sopt_dir = SOPT_SET;
2554 sopt.sopt_level = SOL_SOCKET;
2555 sopt.sopt_name = SO_REUSEADDR;
2556 on = 1;
2557 sopt.sopt_val = &on;
2558 sopt.sopt_valsize = sizeof(on);
2559 ret = -sosetopt(sock, &sopt);
2560 if (ret != 0) {
2561 log(LOG_ERR, "%s: sosetopt(%p, SO_REUSEADDR) "
2562 "failed with %d.\n", __func__, sock, ret);
2563 }
2564 bzero(&sopt, sizeof(struct sockopt));
2565 sopt.sopt_dir = SOPT_SET;
2566 sopt.sopt_level = SOL_SOCKET;
2567 sopt.sopt_name = SO_REUSEPORT;
2568 on = 1;
2569 sopt.sopt_val = &on;
2570 sopt.sopt_valsize = sizeof(on);
2571 ret = -sosetopt(sock, &sopt);
2572 if (ret != 0) {
2573 log(LOG_ERR, "%s: sosetopt(%p, SO_REUSEPORT) "
2574 "failed with %d.\n", __func__, sock, ret);
2575 }
2576 }
2577
2578 ret = -sobind(sock, (struct sockaddr *)laddr, curthread);
2579 if (ret) {
2580 CTR2(KTR_IW_CXGBE, "%s:Failed to bind socket. err %p",
2581 __func__, ret);
2582 sock_release(sock);
2583 return ret;
2584 }
2585
2586 size = laddr->ss_family == AF_INET6 ?
2587 sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in);
2588 ret = sock_getname(sock, (struct sockaddr *)laddr, &size, 0);
2589 if (ret) {
2590 CTR2(KTR_IW_CXGBE, "%s:sock_getname failed. err %p",
2591 __func__, ret);
2592 sock_release(sock);
2593 return ret;
2594 }
2595
2596 *so = sock;
2597 return 0;
2598 }
2599
c4iw_connect(struct iw_cm_id * cm_id,struct iw_cm_conn_param * conn_param)2600 int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2601 {
2602 int err = 0;
2603 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
2604 struct c4iw_ep *ep = NULL;
2605 if_t nh_ifp; /* Logical egress interface */
2606 struct epoch_tracker et;
2607 #ifdef VIMAGE
2608 struct rdma_cm_id *rdma_id = (struct rdma_cm_id*)cm_id->context;
2609 struct vnet *vnet = rdma_id->route.addr.dev_addr.net;
2610 #endif
2611
2612 CTR2(KTR_IW_CXGBE, "%s:ccB %p", __func__, cm_id);
2613
2614 if (__predict_false(c4iw_stopped(&dev->rdev)))
2615 return -EIO;
2616
2617 if ((conn_param->ord > c4iw_max_read_depth) ||
2618 (conn_param->ird > c4iw_max_read_depth)) {
2619
2620 CTR2(KTR_IW_CXGBE, "%s:cc1 %p", __func__, cm_id);
2621 err = -EINVAL;
2622 goto out;
2623 }
2624 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
2625 cm_id->provider_data = ep;
2626
2627 init_timer(&ep->timer);
2628 ep->plen = conn_param->private_data_len;
2629
2630 if (ep->plen) {
2631
2632 CTR2(KTR_IW_CXGBE, "%s:cc3 %p", __func__, ep);
2633 memcpy(ep->mpa_pkt + sizeof(struct mpa_message),
2634 conn_param->private_data, ep->plen);
2635 }
2636 ep->ird = conn_param->ird;
2637 ep->ord = conn_param->ord;
2638
2639 if (peer2peer && ep->ord == 0) {
2640
2641 CTR2(KTR_IW_CXGBE, "%s:cc4 %p", __func__, ep);
2642 ep->ord = 1;
2643 }
2644
2645 ep->com.dev = dev;
2646 ep->com.cm_id = cm_id;
2647 ref_cm_id(&ep->com);
2648 ep->com.qp = get_qhp(dev, conn_param->qpn);
2649
2650 if (!ep->com.qp) {
2651
2652 CTR2(KTR_IW_CXGBE, "%s:cc5 %p", __func__, ep);
2653 err = -EINVAL;
2654 goto fail;
2655 }
2656 ref_qp(ep);
2657 ep->com.thread = curthread;
2658
2659 NET_EPOCH_ENTER(et);
2660 CURVNET_SET(vnet);
2661 err = get_ifnet_from_raddr(&cm_id->remote_addr, &nh_ifp);
2662 CURVNET_RESTORE();
2663 NET_EPOCH_EXIT(et);
2664
2665 if (err) {
2666
2667 CTR2(KTR_IW_CXGBE, "%s:cc7 %p", __func__, ep);
2668 printk(KERN_ERR MOD "%s - cannot find route.\n", __func__);
2669 return -EHOSTUNREACH;
2670 }
2671
2672 if (!(if_getcapenable(nh_ifp) & IFCAP_TOE) ||
2673 TOEDEV(nh_ifp) == NULL) {
2674 err = -ENOPROTOOPT;
2675 goto fail;
2676 }
2677 ep->com.state = CONNECTING;
2678 ep->tos = 0;
2679 ep->com.local_addr = cm_id->local_addr;
2680 ep->com.remote_addr = cm_id->remote_addr;
2681
2682 err = c4iw_sock_create(&cm_id->local_addr, &ep->com.so);
2683 if (err)
2684 goto fail;
2685
2686 setiwsockopt(ep->com.so);
2687 init_iwarp_socket(ep->com.so, &ep->com);
2688 err = -soconnect(ep->com.so, (struct sockaddr *)&ep->com.remote_addr,
2689 ep->com.thread);
2690 if (err)
2691 goto fail_free_so;
2692 CTR2(KTR_IW_CXGBE, "%s:ccE, ep %p", __func__, ep);
2693 return 0;
2694
2695 fail_free_so:
2696 uninit_iwarp_socket(ep->com.so);
2697 ep->com.state = DEAD;
2698 sock_release(ep->com.so);
2699 fail:
2700 deref_cm_id(&ep->com);
2701 c4iw_put_ep(&ep->com);
2702 ep = NULL;
2703 out:
2704 CTR2(KTR_IW_CXGBE, "%s:ccE Error %d", __func__, err);
2705 return err;
2706 }
2707
2708 /*
2709 * iwcm->create_listen. Returns -errno on failure.
2710 */
2711 int
c4iw_create_listen(struct iw_cm_id * cm_id,int backlog)2712 c4iw_create_listen(struct iw_cm_id *cm_id, int backlog)
2713 {
2714 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
2715 struct c4iw_listen_ep *lep = NULL;
2716 struct listen_port_info *port_info = NULL;
2717 int rc = 0;
2718
2719 CTR3(KTR_IW_CXGBE, "%s: cm_id %p, backlog %d", __func__, cm_id,
2720 backlog);
2721 if (c4iw_stopped(&dev->rdev)) {
2722 CTR2(KTR_IW_CXGBE, "%s: cm_id %p, stopped", __func__, cm_id);
2723 return -EIO;
2724 }
2725 lep = alloc_ep(sizeof(*lep), GFP_KERNEL);
2726 lep->com.cm_id = cm_id;
2727 ref_cm_id(&lep->com);
2728 lep->com.dev = dev;
2729 lep->backlog = backlog;
2730 lep->com.local_addr = cm_id->local_addr;
2731 lep->com.thread = curthread;
2732 cm_id->provider_data = lep;
2733 lep->com.state = LISTEN;
2734
2735 /* In case of INDADDR_ANY, ibcore creates cmid for each device and
2736 * invokes iw_cxgbe listener callbacks assuming that iw_cxgbe creates
2737 * HW listeners for each device seperately. But toecore expects single
2738 * solisten() call with INADDR_ANY address to create HW listeners on
2739 * all devices for a given port number. So iw_cxgbe driver calls
2740 * solisten() only once for INADDR_ANY(usually done at first time
2741 * listener callback from ibcore). And all the subsequent INADDR_ANY
2742 * listener callbacks from ibcore(for the same port address) do not
2743 * invoke solisten() as first listener callback has already created
2744 * listeners for all other devices(via solisten).
2745 */
2746 if (c4iw_any_addr((struct sockaddr *)&lep->com.local_addr, NULL)) {
2747 port_info = add_ep_to_listenlist(lep);
2748 /* skip solisten() if refcnt > 1, as the listeners were
2749 * already created by 'Master lep'
2750 */
2751 if (port_info->refcnt > 1) {
2752 /* As there will be only one listener socket for a TCP
2753 * port, copy Master lep's socket pointer to other lep's
2754 * that are belonging to same TCP port.
2755 */
2756 struct c4iw_listen_ep *head_lep =
2757 container_of(port_info->lep_list.next,
2758 struct c4iw_listen_ep, listen_ep_list);
2759 lep->com.so = head_lep->com.so;
2760 goto out;
2761 }
2762 }
2763 rc = c4iw_sock_create(&cm_id->local_addr, &lep->com.so);
2764 if (rc) {
2765 CTR2(KTR_IW_CXGBE, "%s:Failed to create socket. err %d",
2766 __func__, rc);
2767 goto fail;
2768 }
2769
2770 rc = -solisten(lep->com.so, backlog, curthread);
2771 if (rc) {
2772 CTR3(KTR_IW_CXGBE, "%s:Failed to listen on sock:%p. err %d",
2773 __func__, lep->com.so, rc);
2774 goto fail_free_so;
2775 }
2776 init_iwarp_socket(lep->com.so, &lep->com);
2777 out:
2778 return 0;
2779
2780 fail_free_so:
2781 sock_release(lep->com.so);
2782 fail:
2783 if (port_info)
2784 rem_ep_from_listenlist(lep);
2785 deref_cm_id(&lep->com);
2786 c4iw_put_ep(&lep->com);
2787 return rc;
2788 }
2789
2790 int
c4iw_destroy_listen(struct iw_cm_id * cm_id)2791 c4iw_destroy_listen(struct iw_cm_id *cm_id)
2792 {
2793 struct c4iw_listen_ep *lep = to_listen_ep(cm_id);
2794
2795 mutex_lock(&lep->com.mutex);
2796 CTR3(KTR_IW_CXGBE, "%s: cm_id %p, state %s", __func__, cm_id,
2797 states[lep->com.state]);
2798
2799 lep->com.state = DEAD;
2800 if (c4iw_any_addr((struct sockaddr *)&lep->com.local_addr,
2801 lep->com.so->so_vnet)) {
2802 /* if no refcount then close listen socket */
2803 if (!rem_ep_from_listenlist(lep))
2804 close_socket(lep->com.so);
2805 } else
2806 close_socket(lep->com.so);
2807 deref_cm_id(&lep->com);
2808 mutex_unlock(&lep->com.mutex);
2809 c4iw_put_ep(&lep->com);
2810 return 0;
2811 }
2812
__c4iw_ep_disconnect(struct c4iw_ep * ep,int abrupt,gfp_t gfp)2813 int __c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp)
2814 {
2815 int ret;
2816 mutex_lock(&ep->com.mutex);
2817 ret = c4iw_ep_disconnect(ep, abrupt, gfp);
2818 mutex_unlock(&ep->com.mutex);
2819 return ret;
2820 }
2821
c4iw_ep_disconnect(struct c4iw_ep * ep,int abrupt,gfp_t gfp)2822 int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp)
2823 {
2824 int ret = 0;
2825 int close = 0;
2826 struct c4iw_rdev *rdev;
2827
2828
2829 CTR2(KTR_IW_CXGBE, "%s:cedB %p", __func__, ep);
2830
2831 rdev = &ep->com.dev->rdev;
2832
2833 if (c4iw_stopped(rdev)) {
2834 CTR3(KTR_IW_CXGBE, "%s:ced1 stopped %p %s", __func__, ep,
2835 states[ep->com.state]);
2836 if (ep->com.state != DEAD) {
2837 send_abort(ep);
2838 ep->com.state = DEAD;
2839 }
2840 close_complete_upcall(ep, -ECONNRESET);
2841 return ECONNRESET;
2842 }
2843 CTR3(KTR_IW_CXGBE, "%s:ced2 %p %s", __func__, ep,
2844 states[ep->com.state]);
2845
2846 /*
2847 * Ref the ep here in case we have fatal errors causing the
2848 * ep to be released and freed.
2849 */
2850 c4iw_get_ep(&ep->com);
2851 switch (ep->com.state) {
2852
2853 case MPA_REQ_WAIT:
2854 case MPA_REQ_SENT:
2855 case MPA_REQ_RCVD:
2856 case MPA_REP_SENT:
2857 case FPDU_MODE:
2858 close = 1;
2859 if (abrupt)
2860 ep->com.state = ABORTING;
2861 else {
2862 ep->com.state = CLOSING;
2863 START_EP_TIMER(ep);
2864 }
2865 set_bit(CLOSE_SENT, &ep->com.flags);
2866 break;
2867
2868 case CLOSING:
2869
2870 if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
2871
2872 close = 1;
2873 if (abrupt) {
2874 STOP_EP_TIMER(ep);
2875 ep->com.state = ABORTING;
2876 } else
2877 ep->com.state = MORIBUND;
2878 }
2879 break;
2880
2881 case MORIBUND:
2882 case ABORTING:
2883 case DEAD:
2884 CTR3(KTR_IW_CXGBE,
2885 "%s ignoring disconnect ep %p state %u", __func__,
2886 ep, ep->com.state);
2887 break;
2888
2889 default:
2890 BUG();
2891 break;
2892 }
2893
2894
2895 if (close) {
2896
2897 CTR2(KTR_IW_CXGBE, "%s:ced3 %p", __func__, ep);
2898
2899 if (abrupt) {
2900
2901 CTR2(KTR_IW_CXGBE, "%s:ced4 %p", __func__, ep);
2902 set_bit(EP_DISC_ABORT, &ep->com.history);
2903 close_complete_upcall(ep, -ECONNRESET);
2904 send_abort(ep);
2905 } else {
2906
2907 CTR2(KTR_IW_CXGBE, "%s:ced5 %p", __func__, ep);
2908 set_bit(EP_DISC_CLOSE, &ep->com.history);
2909
2910 if (!ep->parent_ep)
2911 ep->com.state = MORIBUND;
2912
2913 CURVNET_SET(ep->com.so->so_vnet);
2914 ret = sodisconnect(ep->com.so);
2915 CURVNET_RESTORE();
2916 if (ret) {
2917 CTR2(KTR_IW_CXGBE, "%s:ced6 %p", __func__, ep);
2918 STOP_EP_TIMER(ep);
2919 send_abort(ep);
2920 ep->com.state = DEAD;
2921 close_complete_upcall(ep, -ECONNRESET);
2922 set_bit(EP_DISC_FAIL, &ep->com.history);
2923 if (ep->com.qp) {
2924 struct c4iw_qp_attributes attrs = {0};
2925
2926 attrs.next_state = C4IW_QP_STATE_ERROR;
2927 ret = c4iw_modify_qp(
2928 ep->com.dev, ep->com.qp,
2929 C4IW_QP_ATTR_NEXT_STATE,
2930 &attrs, 1);
2931 CTR3(KTR_IW_CXGBE, "%s:ced7 %p ret %d",
2932 __func__, ep, ret);
2933 }
2934 }
2935 }
2936 }
2937 c4iw_put_ep(&ep->com);
2938 CTR2(KTR_IW_CXGBE, "%s:cedE %p", __func__, ep);
2939 return ret;
2940 }
2941
2942 #ifdef C4IW_EP_REDIRECT
c4iw_ep_redirect(void * ctx,struct dst_entry * old,struct dst_entry * new,struct l2t_entry * l2t)2943 int c4iw_ep_redirect(void *ctx, struct dst_entry *old, struct dst_entry *new,
2944 struct l2t_entry *l2t)
2945 {
2946 struct c4iw_ep *ep = ctx;
2947
2948 if (ep->dst != old)
2949 return 0;
2950
2951 PDBG("%s ep %p redirect to dst %p l2t %p\n", __func__, ep, new,
2952 l2t);
2953 dst_hold(new);
2954 cxgb4_l2t_release(ep->l2t);
2955 ep->l2t = l2t;
2956 dst_release(old);
2957 ep->dst = new;
2958 return 1;
2959 }
2960 #endif
2961
2962
2963
ep_timeout(unsigned long arg)2964 static void ep_timeout(unsigned long arg)
2965 {
2966 struct c4iw_ep *ep = (struct c4iw_ep *)arg;
2967
2968 if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
2969
2970 /*
2971 * Only insert if it is not already on the list.
2972 */
2973 if (!(ep->com.ep_events & C4IW_EVENT_TIMEOUT)) {
2974 CTR2(KTR_IW_CXGBE, "%s:et1 %p", __func__, ep);
2975 add_ep_to_req_list(ep, C4IW_EVENT_TIMEOUT);
2976 }
2977 }
2978 }
2979
fw6_wr_rpl(struct adapter * sc,const __be64 * rpl)2980 static int fw6_wr_rpl(struct adapter *sc, const __be64 *rpl)
2981 {
2982 uint64_t val = be64toh(*rpl);
2983 int ret;
2984 struct c4iw_wr_wait *wr_waitp;
2985
2986 ret = (int)((val >> 8) & 0xff);
2987 wr_waitp = (struct c4iw_wr_wait *)rpl[1];
2988 CTR3(KTR_IW_CXGBE, "%s wr_waitp %p ret %u", __func__, wr_waitp, ret);
2989 if (wr_waitp)
2990 c4iw_wake_up(wr_waitp, ret ? -ret : 0);
2991
2992 return (0);
2993 }
2994
fw6_cqe_handler(struct adapter * sc,const __be64 * rpl)2995 static int fw6_cqe_handler(struct adapter *sc, const __be64 *rpl)
2996 {
2997 struct cqe_list_entry *cle;
2998 unsigned long flag;
2999
3000 cle = malloc(sizeof(*cle), M_CXGBE, M_NOWAIT);
3001 cle->rhp = sc->iwarp_softc;
3002 cle->err_cqe = *(const struct t4_cqe *)(&rpl[0]);
3003
3004 spin_lock_irqsave(&err_cqe_lock, flag);
3005 list_add_tail(&cle->entry, &err_cqe_list);
3006 queue_work(c4iw_taskq, &c4iw_task);
3007 spin_unlock_irqrestore(&err_cqe_lock, flag);
3008
3009 return (0);
3010 }
3011
3012 static int
process_terminate(struct c4iw_ep * ep)3013 process_terminate(struct c4iw_ep *ep)
3014 {
3015 struct c4iw_qp_attributes attrs = {0};
3016
3017 CTR2(KTR_IW_CXGBE, "%s:tB %p %d", __func__, ep);
3018
3019 if (ep && ep->com.qp) {
3020
3021 printk(KERN_WARNING MOD "TERM received tid %u qpid %u\n",
3022 ep->hwtid, ep->com.qp->wq.sq.qid);
3023 attrs.next_state = C4IW_QP_STATE_TERMINATE;
3024 c4iw_modify_qp(ep->com.dev, ep->com.qp, C4IW_QP_ATTR_NEXT_STATE, &attrs,
3025 1);
3026 } else
3027 printk(KERN_WARNING MOD "TERM received tid %u no ep/qp\n",
3028 ep->hwtid);
3029 CTR2(KTR_IW_CXGBE, "%s:tE %p %d", __func__, ep);
3030
3031 return 0;
3032 }
3033
c4iw_cm_init(void)3034 int __init c4iw_cm_init(void)
3035 {
3036
3037 t4_register_cpl_handler(CPL_RDMA_TERMINATE, terminate);
3038 t4_register_fw_msg_handler(FW6_TYPE_WR_RPL, fw6_wr_rpl);
3039 t4_register_fw_msg_handler(FW6_TYPE_CQE, fw6_cqe_handler);
3040 t4_register_an_handler(c4iw_ev_handler);
3041
3042 TAILQ_INIT(&req_list);
3043 spin_lock_init(&req_lock);
3044 INIT_LIST_HEAD(&err_cqe_list);
3045 spin_lock_init(&err_cqe_lock);
3046
3047 INIT_WORK(&c4iw_task, process_req);
3048
3049 c4iw_taskq = create_singlethread_workqueue("iw_cxgbe");
3050 if (!c4iw_taskq)
3051 return -ENOMEM;
3052
3053 return 0;
3054 }
3055
c4iw_cm_term(void)3056 void __exit c4iw_cm_term(void)
3057 {
3058 WARN_ON(!TAILQ_EMPTY(&req_list));
3059 WARN_ON(!list_empty(&err_cqe_list));
3060 flush_workqueue(c4iw_taskq);
3061 destroy_workqueue(c4iw_taskq);
3062
3063 t4_register_cpl_handler(CPL_RDMA_TERMINATE, NULL);
3064 t4_register_fw_msg_handler(FW6_TYPE_WR_RPL, NULL);
3065 t4_register_fw_msg_handler(FW6_TYPE_CQE, NULL);
3066 t4_register_an_handler(NULL);
3067 }
3068 #endif
3069