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 *)(so_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 struct ifnet **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 struct ifnet *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 (ifp->if_type == 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,struct ifnet ** ifp)534 get_ifnet_from_raddr(struct sockaddr_storage *raddr, struct ifnet **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 int 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
c4iw_loopback_addr(struct sockaddr * addr)947 static inline int c4iw_loopback_addr(struct sockaddr *addr)
948 {
949 if (addr->sa_family == AF_INET)
950 return IN_LOOPBACK(
951 ntohl(((struct sockaddr_in *) addr)->sin_addr.s_addr));
952 else
953 return IN6_IS_ADDR_LOOPBACK(
954 &((struct sockaddr_in6 *) addr)->sin6_addr);
955 }
956
c4iw_any_addr(struct sockaddr * addr)957 static inline int c4iw_any_addr(struct sockaddr *addr)
958 {
959 return c4iw_zero_addr(addr) || c4iw_loopback_addr(addr);
960 }
961
962 static void
process_newconn(struct c4iw_listen_ep * master_lep,struct socket * new_so)963 process_newconn(struct c4iw_listen_ep *master_lep, struct socket *new_so)
964 {
965 struct c4iw_listen_ep *real_lep = NULL;
966 struct c4iw_ep *new_ep = NULL;
967 struct sockaddr_in *remote = NULL;
968 int ret = 0;
969
970 MPASS(new_so != NULL);
971
972 if (c4iw_any_addr((struct sockaddr *)&master_lep->com.local_addr)) {
973 /* Here we need to find the 'real_lep' that belongs to the
974 * incomming socket's network interface, such that the newly
975 * created 'ep' can be attached to the real 'lep'.
976 */
977 real_lep = find_real_listen_ep(master_lep, new_so);
978 if (real_lep == NULL) {
979 CTR2(KTR_IW_CXGBE, "%s: Could not find the real listen "
980 "ep for sock: %p", __func__, new_so);
981 log(LOG_ERR,"%s: Could not find the real listen ep for "
982 "sock: %p\n", __func__, new_so);
983 /* FIXME: properly free the 'new_so' in failure case.
984 * Use of soabort() and soclose() are not legal
985 * here(before soaccept()).
986 */
987 return;
988 }
989 } else /* for Non-Wildcard address, master_lep is always the real_lep */
990 real_lep = master_lep;
991
992 new_ep = alloc_ep(sizeof(*new_ep), GFP_KERNEL);
993
994 CTR6(KTR_IW_CXGBE, "%s: master_lep %p, real_lep: %p, new ep %p, "
995 "listening so %p, new so %p", __func__, master_lep, real_lep,
996 new_ep, master_lep->com.so, new_so);
997
998 new_ep->com.dev = real_lep->com.dev;
999 new_ep->com.so = new_so;
1000 new_ep->com.cm_id = NULL;
1001 new_ep->com.thread = real_lep->com.thread;
1002 new_ep->parent_ep = real_lep;
1003
1004 GET_LOCAL_ADDR(&new_ep->com.local_addr, new_so);
1005 GET_REMOTE_ADDR(&new_ep->com.remote_addr, new_so);
1006 c4iw_get_ep(&real_lep->com);
1007 init_timer(&new_ep->timer);
1008 new_ep->com.state = MPA_REQ_WAIT;
1009
1010 setiwsockopt(new_so);
1011 ret = soaccept(new_so, (struct sockaddr **)&remote);
1012 if (ret != 0) {
1013 CTR4(KTR_IW_CXGBE,
1014 "%s:listen sock:%p, new sock:%p, ret:%d",
1015 __func__, master_lep->com.so, new_so, ret);
1016 if (remote != NULL)
1017 free(remote, M_SONAME);
1018 soclose(new_so);
1019 c4iw_put_ep(&new_ep->com);
1020 c4iw_put_ep(&real_lep->com);
1021 return;
1022 }
1023 free(remote, M_SONAME);
1024
1025 START_EP_TIMER(new_ep);
1026
1027 /* MPA request might have been queued up on the socket already, so we
1028 * initialize the socket/upcall_handler under lock to prevent processing
1029 * MPA request on another thread(via process_req()) simultaneously.
1030 */
1031 c4iw_get_ep(&new_ep->com); /* Dereferenced at the end below, this is to
1032 avoid freeing of ep before ep unlock. */
1033 mutex_lock(&new_ep->com.mutex);
1034 init_iwarp_socket(new_so, &new_ep->com);
1035
1036 ret = process_mpa_request(new_ep);
1037 if (ret) {
1038 /* ABORT */
1039 c4iw_ep_disconnect(new_ep, 1, GFP_KERNEL);
1040 c4iw_put_ep(&real_lep->com);
1041 }
1042 mutex_unlock(&new_ep->com.mutex);
1043 c4iw_put_ep(&new_ep->com);
1044 return;
1045 }
1046
1047 static int
add_ep_to_req_list(struct c4iw_ep * ep,int new_ep_event)1048 add_ep_to_req_list(struct c4iw_ep *ep, int new_ep_event)
1049 {
1050 unsigned long flag;
1051
1052 spin_lock_irqsave(&req_lock, flag);
1053 if (ep && ep->com.so) {
1054 ep->com.ep_events |= new_ep_event;
1055 if (!ep->com.entry.tqe_prev) {
1056 c4iw_get_ep(&ep->com);
1057 TAILQ_INSERT_TAIL(&req_list, &ep->com, entry);
1058 queue_work(c4iw_taskq, &c4iw_task);
1059 }
1060 }
1061 spin_unlock_irqrestore(&req_lock, flag);
1062
1063 return (0);
1064 }
1065
1066 static int
c4iw_so_upcall(struct socket * so,void * arg,int waitflag)1067 c4iw_so_upcall(struct socket *so, void *arg, int waitflag)
1068 {
1069 struct c4iw_ep *ep = arg;
1070
1071 CTR6(KTR_IW_CXGBE,
1072 "%s: so %p, so_state 0x%x, ep %p, ep_state %s, tqe_prev %p",
1073 __func__, so, so->so_state, ep, states[ep->com.state],
1074 ep->com.entry.tqe_prev);
1075
1076 MPASS(ep->com.so == so);
1077 /*
1078 * Wake up any threads waiting in rdma_init()/rdma_fini(),
1079 * with locks held.
1080 */
1081 if (so->so_error || (ep->com.dev->rdev.flags & T4_FATAL_ERROR))
1082 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
1083 add_ep_to_req_list(ep, C4IW_EVENT_SOCKET);
1084
1085 return (SU_OK);
1086 }
1087
1088
1089 static int
terminate(struct sge_iq * iq,const struct rss_header * rss,struct mbuf * m)1090 terminate(struct sge_iq *iq, const struct rss_header *rss, struct mbuf *m)
1091 {
1092 struct adapter *sc = iq->adapter;
1093 const struct cpl_rdma_terminate *cpl = mtod(m, const void *);
1094 unsigned int tid = GET_TID(cpl);
1095 struct toepcb *toep = lookup_tid(sc, tid);
1096 struct socket *so;
1097 struct c4iw_ep *ep;
1098
1099 INP_WLOCK(toep->inp);
1100 so = inp_inpcbtosocket(toep->inp);
1101 ep = so->so_rcv.sb_upcallarg;
1102 INP_WUNLOCK(toep->inp);
1103
1104 CTR3(KTR_IW_CXGBE, "%s: so %p, ep %p", __func__, so, ep);
1105 add_ep_to_req_list(ep, C4IW_EVENT_TERM);
1106
1107 return 0;
1108 }
1109
1110 static void
process_socket_event(struct c4iw_ep * ep)1111 process_socket_event(struct c4iw_ep *ep)
1112 {
1113 int state = ep->com.state;
1114 struct socket *so = ep->com.so;
1115
1116 if (ep->com.state == DEAD) {
1117 CTR3(KTR_IW_CXGBE, "%s: Pending socket event discarded "
1118 "ep %p ep_state %s", __func__, ep, states[state]);
1119 return;
1120 }
1121
1122 CTR6(KTR_IW_CXGBE, "process_socket_event: so %p, so_state 0x%x, "
1123 "so_err %d, sb_state 0x%x, ep %p, ep_state %s", so, so->so_state,
1124 so->so_error, so->so_rcv.sb_state, ep, states[state]);
1125
1126 if (state == CONNECTING) {
1127 process_connected(ep);
1128 return;
1129 }
1130
1131 if (state == LISTEN) {
1132 struct c4iw_listen_ep *lep = (struct c4iw_listen_ep *)ep;
1133 struct socket *listen_so = so, *new_so = NULL;
1134 int error = 0;
1135
1136 SOLISTEN_LOCK(listen_so);
1137 do {
1138 error = solisten_dequeue(listen_so, &new_so,
1139 SOCK_NONBLOCK);
1140 if (error) {
1141 CTR4(KTR_IW_CXGBE, "%s: lep %p listen_so %p "
1142 "error %d", __func__, lep, listen_so,
1143 error);
1144 return;
1145 }
1146 process_newconn(lep, new_so);
1147
1148 /* solisten_dequeue() unlocks while return, so aquire
1149 * lock again for sol_qlen and also for next iteration.
1150 */
1151 SOLISTEN_LOCK(listen_so);
1152 } while (listen_so->sol_qlen);
1153 SOLISTEN_UNLOCK(listen_so);
1154
1155 return;
1156 }
1157
1158 /* connection error */
1159 if (so->so_error) {
1160 process_conn_error(ep);
1161 return;
1162 }
1163
1164 /* peer close */
1165 if ((so->so_rcv.sb_state & SBS_CANTRCVMORE) && state <= CLOSING) {
1166 process_peer_close(ep);
1167 /*
1168 * check whether socket disconnect event is pending before
1169 * returning. Fallthrough if yes.
1170 */
1171 if (!(so->so_state & SS_ISDISCONNECTED))
1172 return;
1173 }
1174
1175 /* close complete */
1176 if (so->so_state & SS_ISDISCONNECTED) {
1177 process_close_complete(ep);
1178 return;
1179 }
1180
1181 /* rx data */
1182 if (sbused(&ep->com.so->so_rcv)) {
1183 process_data(ep);
1184 return;
1185 }
1186
1187 /* Socket events for 'MPA Request Received' and 'Close Complete'
1188 * were already processed earlier in their previous events handlers.
1189 * Hence, these socket events are skipped.
1190 * And any other socket events must have handled above.
1191 */
1192 MPASS((ep->com.state == MPA_REQ_RCVD) || (ep->com.state == MORIBUND));
1193
1194 if ((ep->com.state != MPA_REQ_RCVD) && (ep->com.state != MORIBUND))
1195 log(LOG_ERR, "%s: Unprocessed socket event so %p, "
1196 "so_state 0x%x, so_err %d, sb_state 0x%x, ep %p, ep_state %s\n",
1197 __func__, so, so->so_state, so->so_error, so->so_rcv.sb_state,
1198 ep, states[state]);
1199
1200 }
1201
1202 SYSCTL_NODE(_hw, OID_AUTO, iw_cxgbe, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
1203 "iw_cxgbe driver parameters");
1204
1205 static int dack_mode = 0;
1206 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, dack_mode, CTLFLAG_RWTUN, &dack_mode, 0,
1207 "Delayed ack mode (default = 0)");
1208
1209 int c4iw_max_read_depth = 8;
1210 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, c4iw_max_read_depth, CTLFLAG_RWTUN, &c4iw_max_read_depth, 0,
1211 "Per-connection max ORD/IRD (default = 8)");
1212
1213 static int enable_tcp_timestamps;
1214 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, enable_tcp_timestamps, CTLFLAG_RWTUN, &enable_tcp_timestamps, 0,
1215 "Enable tcp timestamps (default = 0)");
1216
1217 static int enable_tcp_sack;
1218 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, enable_tcp_sack, CTLFLAG_RWTUN, &enable_tcp_sack, 0,
1219 "Enable tcp SACK (default = 0)");
1220
1221 static int enable_tcp_window_scaling = 1;
1222 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, enable_tcp_window_scaling, CTLFLAG_RWTUN, &enable_tcp_window_scaling, 0,
1223 "Enable tcp window scaling (default = 1)");
1224
1225 int c4iw_debug = 0;
1226 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, c4iw_debug, CTLFLAG_RWTUN, &c4iw_debug, 0,
1227 "Enable debug logging (default = 0)");
1228
1229 static int peer2peer = 1;
1230 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, peer2peer, CTLFLAG_RWTUN, &peer2peer, 0,
1231 "Support peer2peer ULPs (default = 1)");
1232
1233 static int p2p_type = FW_RI_INIT_P2PTYPE_READ_REQ;
1234 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, p2p_type, CTLFLAG_RWTUN, &p2p_type, 0,
1235 "RDMAP opcode to use for the RTR message: 1 = RDMA_READ 0 = RDMA_WRITE (default 1)");
1236
1237 static int ep_timeout_secs = 60;
1238 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, ep_timeout_secs, CTLFLAG_RWTUN, &ep_timeout_secs, 0,
1239 "CM Endpoint operation timeout in seconds (default = 60)");
1240
1241 static int mpa_rev = 1;
1242 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, mpa_rev, CTLFLAG_RWTUN, &mpa_rev, 0,
1243 "MPA Revision, 0 supports amso1100, 1 is RFC5044 spec compliant, 2 is IETF MPA Peer Connect Draft compliant (default = 1)");
1244
1245 static int markers_enabled;
1246 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, markers_enabled, CTLFLAG_RWTUN, &markers_enabled, 0,
1247 "Enable MPA MARKERS (default(0) = disabled)");
1248
1249 static int crc_enabled = 1;
1250 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, crc_enabled, CTLFLAG_RWTUN, &crc_enabled, 0,
1251 "Enable MPA CRC (default(1) = enabled)");
1252
1253 static int rcv_win = 256 * 1024;
1254 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, rcv_win, CTLFLAG_RWTUN, &rcv_win, 0,
1255 "TCP receive window in bytes (default = 256KB)");
1256
1257 static int snd_win = 128 * 1024;
1258 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, snd_win, CTLFLAG_RWTUN, &snd_win, 0,
1259 "TCP send window in bytes (default = 128KB)");
1260
1261 int use_dsgl = 1;
1262 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, use_dsgl, CTLFLAG_RWTUN, &use_dsgl, 0,
1263 "Use DSGL for PBL/FastReg (default=1)");
1264
1265 int inline_threshold = 128;
1266 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, inline_threshold, CTLFLAG_RWTUN, &inline_threshold, 0,
1267 "inline vs dsgl threshold (default=128)");
1268
1269 static int reuseaddr = 0;
1270 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, reuseaddr, CTLFLAG_RWTUN, &reuseaddr, 0,
1271 "Enable SO_REUSEADDR & SO_REUSEPORT socket options on all iWARP client connections(default = 0)");
1272
1273 static void
start_ep_timer(struct c4iw_ep * ep)1274 start_ep_timer(struct c4iw_ep *ep)
1275 {
1276
1277 if (timer_pending(&ep->timer)) {
1278 CTR2(KTR_IW_CXGBE, "%s: ep %p, already started", __func__, ep);
1279 printk(KERN_ERR "%s timer already started! ep %p\n", __func__,
1280 ep);
1281 return;
1282 }
1283 clear_bit(TIMEOUT, &ep->com.flags);
1284 c4iw_get_ep(&ep->com);
1285 ep->timer.expires = jiffies + ep_timeout_secs * HZ;
1286 ep->timer.data = (unsigned long)ep;
1287 ep->timer.function = ep_timeout;
1288 add_timer(&ep->timer);
1289 }
1290
1291 static int
stop_ep_timer(struct c4iw_ep * ep)1292 stop_ep_timer(struct c4iw_ep *ep)
1293 {
1294
1295 del_timer_sync(&ep->timer);
1296 if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
1297 c4iw_put_ep(&ep->com);
1298 return 0;
1299 }
1300 return 1;
1301 }
1302
1303 static void *
alloc_ep(int size,gfp_t gfp)1304 alloc_ep(int size, gfp_t gfp)
1305 {
1306 struct c4iw_ep_common *epc;
1307
1308 epc = kzalloc(size, gfp);
1309 if (epc == NULL)
1310 return (NULL);
1311
1312 kref_init(&epc->kref);
1313 mutex_init(&epc->mutex);
1314 c4iw_init_wr_wait(&epc->wr_wait);
1315
1316 return (epc);
1317 }
1318
_c4iw_free_ep(struct kref * kref)1319 void _c4iw_free_ep(struct kref *kref)
1320 {
1321 struct c4iw_ep *ep;
1322 #if defined(KTR) || defined(INVARIANTS)
1323 struct c4iw_ep_common *epc;
1324 #endif
1325
1326 ep = container_of(kref, struct c4iw_ep, com.kref);
1327 #if defined(KTR) || defined(INVARIANTS)
1328 epc = &ep->com;
1329 #endif
1330 KASSERT(!epc->entry.tqe_prev, ("%s epc %p still on req list",
1331 __func__, epc));
1332 if (test_bit(QP_REFERENCED, &ep->com.flags))
1333 deref_qp(ep);
1334 CTR4(KTR_IW_CXGBE, "%s: ep %p, history 0x%lx, flags 0x%lx",
1335 __func__, ep, epc->history, epc->flags);
1336 kfree(ep);
1337 }
1338
release_ep_resources(struct c4iw_ep * ep)1339 static void release_ep_resources(struct c4iw_ep *ep)
1340 {
1341 CTR2(KTR_IW_CXGBE, "%s:rerB %p", __func__, ep);
1342 set_bit(RELEASE_RESOURCES, &ep->com.flags);
1343 c4iw_put_ep(&ep->com);
1344 CTR2(KTR_IW_CXGBE, "%s:rerE %p", __func__, ep);
1345 }
1346
1347 static int
send_mpa_req(struct c4iw_ep * ep)1348 send_mpa_req(struct c4iw_ep *ep)
1349 {
1350 int mpalen;
1351 struct mpa_message *mpa;
1352 struct mpa_v2_conn_params mpa_v2_params;
1353 struct mbuf *m;
1354 char mpa_rev_to_use = mpa_rev;
1355 int err = 0;
1356
1357 if (ep->retry_with_mpa_v1)
1358 mpa_rev_to_use = 1;
1359 mpalen = sizeof(*mpa) + ep->plen;
1360 if (mpa_rev_to_use == 2)
1361 mpalen += sizeof(struct mpa_v2_conn_params);
1362
1363 mpa = malloc(mpalen, M_CXGBE, M_NOWAIT);
1364 if (mpa == NULL) {
1365 err = -ENOMEM;
1366 CTR3(KTR_IW_CXGBE, "%s:smr1 ep: %p , error: %d",
1367 __func__, ep, err);
1368 goto err;
1369 }
1370
1371 memset(mpa, 0, mpalen);
1372 memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
1373 mpa->flags = (crc_enabled ? MPA_CRC : 0) |
1374 (markers_enabled ? MPA_MARKERS : 0) |
1375 (mpa_rev_to_use == 2 ? MPA_ENHANCED_RDMA_CONN : 0);
1376 mpa->private_data_size = htons(ep->plen);
1377 mpa->revision = mpa_rev_to_use;
1378
1379 if (mpa_rev_to_use == 1) {
1380 ep->tried_with_mpa_v1 = 1;
1381 ep->retry_with_mpa_v1 = 0;
1382 }
1383
1384 if (mpa_rev_to_use == 2) {
1385 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
1386 sizeof(struct mpa_v2_conn_params));
1387 mpa_v2_params.ird = htons((u16)ep->ird);
1388 mpa_v2_params.ord = htons((u16)ep->ord);
1389
1390 if (peer2peer) {
1391 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
1392
1393 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE) {
1394 mpa_v2_params.ord |=
1395 htons(MPA_V2_RDMA_WRITE_RTR);
1396 } else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ) {
1397 mpa_v2_params.ord |=
1398 htons(MPA_V2_RDMA_READ_RTR);
1399 }
1400 }
1401 memcpy(mpa->private_data, &mpa_v2_params,
1402 sizeof(struct mpa_v2_conn_params));
1403
1404 if (ep->plen) {
1405
1406 memcpy(mpa->private_data +
1407 sizeof(struct mpa_v2_conn_params),
1408 ep->mpa_pkt + sizeof(*mpa), ep->plen);
1409 }
1410 } else {
1411
1412 if (ep->plen)
1413 memcpy(mpa->private_data,
1414 ep->mpa_pkt + sizeof(*mpa), ep->plen);
1415 CTR2(KTR_IW_CXGBE, "%s:smr7 %p", __func__, ep);
1416 }
1417
1418 m = m_getm(NULL, mpalen, M_NOWAIT, MT_DATA);
1419 if (m == NULL) {
1420 err = -ENOMEM;
1421 CTR3(KTR_IW_CXGBE, "%s:smr2 ep: %p , error: %d",
1422 __func__, ep, err);
1423 free(mpa, M_CXGBE);
1424 goto err;
1425 }
1426 m_copyback(m, 0, mpalen, (void *)mpa);
1427 free(mpa, M_CXGBE);
1428
1429 err = -sosend(ep->com.so, NULL, NULL, m, NULL, MSG_DONTWAIT,
1430 ep->com.thread);
1431 if (err) {
1432 CTR3(KTR_IW_CXGBE, "%s:smr3 ep: %p , error: %d",
1433 __func__, ep, err);
1434 goto err;
1435 }
1436
1437 START_EP_TIMER(ep);
1438 ep->com.state = MPA_REQ_SENT;
1439 ep->mpa_attr.initiator = 1;
1440 CTR3(KTR_IW_CXGBE, "%s:smrE %p, error: %d", __func__, ep, err);
1441 return 0;
1442 err:
1443 connect_reply_upcall(ep, err);
1444 CTR3(KTR_IW_CXGBE, "%s:smrE %p, error: %d", __func__, ep, err);
1445 return err;
1446 }
1447
send_mpa_reject(struct c4iw_ep * ep,const void * pdata,u8 plen)1448 static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen)
1449 {
1450 int mpalen ;
1451 struct mpa_message *mpa;
1452 struct mpa_v2_conn_params mpa_v2_params;
1453 struct mbuf *m;
1454 int err;
1455
1456 CTR4(KTR_IW_CXGBE, "%s:smrejB %p %u %d", __func__, ep, ep->hwtid,
1457 ep->plen);
1458
1459 mpalen = sizeof(*mpa) + plen;
1460
1461 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
1462
1463 mpalen += sizeof(struct mpa_v2_conn_params);
1464 CTR4(KTR_IW_CXGBE, "%s:smrej1 %p %u %d", __func__, ep,
1465 ep->mpa_attr.version, mpalen);
1466 }
1467
1468 mpa = malloc(mpalen, M_CXGBE, M_NOWAIT);
1469 if (mpa == NULL)
1470 return (-ENOMEM);
1471
1472 memset(mpa, 0, mpalen);
1473 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
1474 mpa->flags = MPA_REJECT;
1475 mpa->revision = mpa_rev;
1476 mpa->private_data_size = htons(plen);
1477
1478 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
1479
1480 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
1481 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
1482 sizeof(struct mpa_v2_conn_params));
1483 mpa_v2_params.ird = htons(((u16)ep->ird) |
1484 (peer2peer ? MPA_V2_PEER2PEER_MODEL :
1485 0));
1486 mpa_v2_params.ord = htons(((u16)ep->ord) | (peer2peer ?
1487 (p2p_type ==
1488 FW_RI_INIT_P2PTYPE_RDMA_WRITE ?
1489 MPA_V2_RDMA_WRITE_RTR : p2p_type ==
1490 FW_RI_INIT_P2PTYPE_READ_REQ ?
1491 MPA_V2_RDMA_READ_RTR : 0) : 0));
1492 memcpy(mpa->private_data, &mpa_v2_params,
1493 sizeof(struct mpa_v2_conn_params));
1494
1495 if (ep->plen)
1496 memcpy(mpa->private_data +
1497 sizeof(struct mpa_v2_conn_params), pdata, plen);
1498 CTR5(KTR_IW_CXGBE, "%s:smrej3 %p %d %d %d", __func__, ep,
1499 mpa_v2_params.ird, mpa_v2_params.ord, ep->plen);
1500 } else
1501 if (plen)
1502 memcpy(mpa->private_data, pdata, plen);
1503
1504 m = m_getm(NULL, mpalen, M_NOWAIT, MT_DATA);
1505 if (m == NULL) {
1506 free(mpa, M_CXGBE);
1507 return (-ENOMEM);
1508 }
1509 m_copyback(m, 0, mpalen, (void *)mpa);
1510 free(mpa, M_CXGBE);
1511
1512 err = -sosend(ep->com.so, NULL, NULL, m, NULL, MSG_DONTWAIT, ep->com.thread);
1513 if (!err)
1514 ep->snd_seq += mpalen;
1515 CTR4(KTR_IW_CXGBE, "%s:smrejE %p %u %d", __func__, ep, ep->hwtid, err);
1516 return err;
1517 }
1518
send_mpa_reply(struct c4iw_ep * ep,const void * pdata,u8 plen)1519 static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen)
1520 {
1521 int mpalen;
1522 struct mpa_message *mpa;
1523 struct mbuf *m;
1524 struct mpa_v2_conn_params mpa_v2_params;
1525 int err;
1526
1527 CTR2(KTR_IW_CXGBE, "%s:smrepB %p", __func__, ep);
1528
1529 mpalen = sizeof(*mpa) + plen;
1530
1531 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
1532
1533 CTR3(KTR_IW_CXGBE, "%s:smrep1 %p %d", __func__, ep,
1534 ep->mpa_attr.version);
1535 mpalen += sizeof(struct mpa_v2_conn_params);
1536 }
1537
1538 mpa = malloc(mpalen, M_CXGBE, M_NOWAIT);
1539 if (mpa == NULL)
1540 return (-ENOMEM);
1541
1542 memset(mpa, 0, sizeof(*mpa));
1543 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
1544 mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) |
1545 (markers_enabled ? MPA_MARKERS : 0);
1546 mpa->revision = ep->mpa_attr.version;
1547 mpa->private_data_size = htons(plen);
1548
1549 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
1550
1551 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
1552 mpa->private_data_size +=
1553 htons(sizeof(struct mpa_v2_conn_params));
1554 mpa_v2_params.ird = htons((u16)ep->ird);
1555 mpa_v2_params.ord = htons((u16)ep->ord);
1556 CTR5(KTR_IW_CXGBE, "%s:smrep3 %p %d %d %d", __func__, ep,
1557 ep->mpa_attr.version, mpa_v2_params.ird, mpa_v2_params.ord);
1558
1559 if (peer2peer && (ep->mpa_attr.p2p_type !=
1560 FW_RI_INIT_P2PTYPE_DISABLED)) {
1561
1562 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
1563
1564 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE) {
1565
1566 mpa_v2_params.ord |=
1567 htons(MPA_V2_RDMA_WRITE_RTR);
1568 CTR5(KTR_IW_CXGBE, "%s:smrep4 %p %d %d %d",
1569 __func__, ep, p2p_type, mpa_v2_params.ird,
1570 mpa_v2_params.ord);
1571 }
1572 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ) {
1573
1574 mpa_v2_params.ord |=
1575 htons(MPA_V2_RDMA_READ_RTR);
1576 CTR5(KTR_IW_CXGBE, "%s:smrep5 %p %d %d %d",
1577 __func__, ep, p2p_type, mpa_v2_params.ird,
1578 mpa_v2_params.ord);
1579 }
1580 }
1581
1582 memcpy(mpa->private_data, &mpa_v2_params,
1583 sizeof(struct mpa_v2_conn_params));
1584
1585 if (ep->plen)
1586 memcpy(mpa->private_data +
1587 sizeof(struct mpa_v2_conn_params), pdata, plen);
1588 } else
1589 if (plen)
1590 memcpy(mpa->private_data, pdata, plen);
1591
1592 m = m_getm(NULL, mpalen, M_NOWAIT, MT_DATA);
1593 if (m == NULL) {
1594 free(mpa, M_CXGBE);
1595 return (-ENOMEM);
1596 }
1597 m_copyback(m, 0, mpalen, (void *)mpa);
1598 free(mpa, M_CXGBE);
1599
1600
1601 ep->com.state = MPA_REP_SENT;
1602 ep->snd_seq += mpalen;
1603 err = -sosend(ep->com.so, NULL, NULL, m, NULL, MSG_DONTWAIT,
1604 ep->com.thread);
1605 CTR3(KTR_IW_CXGBE, "%s:smrepE %p %d", __func__, ep, err);
1606 return err;
1607 }
1608
1609
1610
close_complete_upcall(struct c4iw_ep * ep,int status)1611 static void close_complete_upcall(struct c4iw_ep *ep, int status)
1612 {
1613 struct iw_cm_event event;
1614
1615 CTR2(KTR_IW_CXGBE, "%s:ccuB %p", __func__, ep);
1616 memset(&event, 0, sizeof(event));
1617 event.event = IW_CM_EVENT_CLOSE;
1618 event.status = status;
1619
1620 if (ep->com.cm_id) {
1621
1622 CTR2(KTR_IW_CXGBE, "%s:ccu1 %1", __func__, ep);
1623 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1624 deref_cm_id(&ep->com);
1625 set_bit(CLOSE_UPCALL, &ep->com.history);
1626 }
1627 CTR2(KTR_IW_CXGBE, "%s:ccuE %p", __func__, ep);
1628 }
1629
1630 static int
send_abort(struct c4iw_ep * ep)1631 send_abort(struct c4iw_ep *ep)
1632 {
1633 struct socket *so = ep->com.so;
1634 struct sockopt sopt;
1635 int rc;
1636 struct linger l;
1637
1638 CTR5(KTR_IW_CXGBE, "%s ep %p so %p state %s tid %d", __func__, ep, so,
1639 states[ep->com.state], ep->hwtid);
1640
1641 l.l_onoff = 1;
1642 l.l_linger = 0;
1643
1644 /* linger_time of 0 forces RST to be sent */
1645 sopt.sopt_dir = SOPT_SET;
1646 sopt.sopt_level = SOL_SOCKET;
1647 sopt.sopt_name = SO_LINGER;
1648 sopt.sopt_val = (caddr_t)&l;
1649 sopt.sopt_valsize = sizeof l;
1650 sopt.sopt_td = NULL;
1651 rc = -sosetopt(so, &sopt);
1652 if (rc != 0) {
1653 log(LOG_ERR, "%s: sosetopt(%p, linger = 0) failed with %d.\n",
1654 __func__, so, rc);
1655 }
1656
1657 uninit_iwarp_socket(so);
1658 soclose(so);
1659 set_bit(ABORT_CONN, &ep->com.history);
1660
1661 /*
1662 * TBD: iw_cxgbe driver should receive ABORT reply for every ABORT
1663 * request it has sent. But the current TOE driver is not propagating
1664 * this ABORT reply event (via do_abort_rpl) to iw_cxgbe. So as a work-
1665 * around de-refererece 'ep' here instead of doing it in abort_rpl()
1666 * handler(not yet implemented) of iw_cxgbe driver.
1667 */
1668 release_ep_resources(ep);
1669 ep->com.state = DEAD;
1670
1671 return (0);
1672 }
1673
peer_close_upcall(struct c4iw_ep * ep)1674 static void peer_close_upcall(struct c4iw_ep *ep)
1675 {
1676 struct iw_cm_event event;
1677
1678 CTR2(KTR_IW_CXGBE, "%s:pcuB %p", __func__, ep);
1679 memset(&event, 0, sizeof(event));
1680 event.event = IW_CM_EVENT_DISCONNECT;
1681
1682 if (ep->com.cm_id) {
1683
1684 CTR2(KTR_IW_CXGBE, "%s:pcu1 %p", __func__, ep);
1685 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1686 set_bit(DISCONN_UPCALL, &ep->com.history);
1687 }
1688 CTR2(KTR_IW_CXGBE, "%s:pcuE %p", __func__, ep);
1689 }
1690
peer_abort_upcall(struct c4iw_ep * ep)1691 static void peer_abort_upcall(struct c4iw_ep *ep)
1692 {
1693 struct iw_cm_event event;
1694
1695 CTR2(KTR_IW_CXGBE, "%s:pauB %p", __func__, ep);
1696 memset(&event, 0, sizeof(event));
1697 event.event = IW_CM_EVENT_CLOSE;
1698 event.status = -ECONNRESET;
1699
1700 if (ep->com.cm_id) {
1701
1702 CTR2(KTR_IW_CXGBE, "%s:pau1 %p", __func__, ep);
1703 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1704 deref_cm_id(&ep->com);
1705 set_bit(ABORT_UPCALL, &ep->com.history);
1706 }
1707 CTR2(KTR_IW_CXGBE, "%s:pauE %p", __func__, ep);
1708 }
1709
connect_reply_upcall(struct c4iw_ep * ep,int status)1710 static void connect_reply_upcall(struct c4iw_ep *ep, int status)
1711 {
1712 struct iw_cm_event event;
1713
1714 CTR3(KTR_IW_CXGBE, "%s:cruB %p, status: %d", __func__, ep, status);
1715 memset(&event, 0, sizeof(event));
1716 event.event = IW_CM_EVENT_CONNECT_REPLY;
1717 event.status = ((status == -ECONNABORTED) || (status == -EPIPE)) ?
1718 -ECONNRESET : status;
1719 event.local_addr = ep->com.local_addr;
1720 event.remote_addr = ep->com.remote_addr;
1721
1722 if ((status == 0) || (status == -ECONNREFUSED)) {
1723
1724 if (!ep->tried_with_mpa_v1) {
1725
1726 CTR2(KTR_IW_CXGBE, "%s:cru1 %p", __func__, ep);
1727 /* this means MPA_v2 is used */
1728 event.ord = ep->ird;
1729 event.ird = ep->ord;
1730 event.private_data_len = ep->plen -
1731 sizeof(struct mpa_v2_conn_params);
1732 event.private_data = ep->mpa_pkt +
1733 sizeof(struct mpa_message) +
1734 sizeof(struct mpa_v2_conn_params);
1735 } else {
1736
1737 CTR2(KTR_IW_CXGBE, "%s:cru2 %p", __func__, ep);
1738 /* this means MPA_v1 is used */
1739 event.ord = c4iw_max_read_depth;
1740 event.ird = c4iw_max_read_depth;
1741 event.private_data_len = ep->plen;
1742 event.private_data = ep->mpa_pkt +
1743 sizeof(struct mpa_message);
1744 }
1745 }
1746
1747 if (ep->com.cm_id) {
1748
1749 CTR2(KTR_IW_CXGBE, "%s:cru3 %p", __func__, ep);
1750 set_bit(CONN_RPL_UPCALL, &ep->com.history);
1751 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1752 }
1753
1754 if(status == -ECONNABORTED) {
1755
1756 CTR3(KTR_IW_CXGBE, "%s:cruE %p %d", __func__, ep, status);
1757 return;
1758 }
1759
1760 if (status < 0) {
1761
1762 CTR3(KTR_IW_CXGBE, "%s:cru4 %p %d", __func__, ep, status);
1763 deref_cm_id(&ep->com);
1764 }
1765
1766 CTR2(KTR_IW_CXGBE, "%s:cruE %p", __func__, ep);
1767 }
1768
connect_request_upcall(struct c4iw_ep * ep)1769 static int connect_request_upcall(struct c4iw_ep *ep)
1770 {
1771 struct iw_cm_event event;
1772 int ret;
1773
1774 CTR3(KTR_IW_CXGBE, "%s: ep %p, mpa_v1 %d", __func__, ep,
1775 ep->tried_with_mpa_v1);
1776
1777 memset(&event, 0, sizeof(event));
1778 event.event = IW_CM_EVENT_CONNECT_REQUEST;
1779 event.local_addr = ep->com.local_addr;
1780 event.remote_addr = ep->com.remote_addr;
1781 event.provider_data = ep;
1782
1783 if (!ep->tried_with_mpa_v1) {
1784 /* this means MPA_v2 is used */
1785 event.ord = ep->ord;
1786 event.ird = ep->ird;
1787 event.private_data_len = ep->plen -
1788 sizeof(struct mpa_v2_conn_params);
1789 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message) +
1790 sizeof(struct mpa_v2_conn_params);
1791 } else {
1792
1793 /* this means MPA_v1 is used. Send max supported */
1794 event.ord = c4iw_max_read_depth;
1795 event.ird = c4iw_max_read_depth;
1796 event.private_data_len = ep->plen;
1797 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
1798 }
1799
1800 c4iw_get_ep(&ep->com);
1801 ret = ep->parent_ep->com.cm_id->event_handler(ep->parent_ep->com.cm_id,
1802 &event);
1803 if(ret) {
1804 CTR3(KTR_IW_CXGBE, "%s: ep %p, Failure while notifying event to"
1805 " IWCM, err:%d", __func__, ep, ret);
1806 c4iw_put_ep(&ep->com);
1807 } else
1808 /* Dereference parent_ep only in success case.
1809 * In case of failure, parent_ep is dereferenced by the caller
1810 * of process_mpa_request().
1811 */
1812 c4iw_put_ep(&ep->parent_ep->com);
1813
1814 set_bit(CONNREQ_UPCALL, &ep->com.history);
1815 return ret;
1816 }
1817
established_upcall(struct c4iw_ep * ep)1818 static void established_upcall(struct c4iw_ep *ep)
1819 {
1820 struct iw_cm_event event;
1821
1822 CTR2(KTR_IW_CXGBE, "%s:euB %p", __func__, ep);
1823 memset(&event, 0, sizeof(event));
1824 event.event = IW_CM_EVENT_ESTABLISHED;
1825 event.ird = ep->ord;
1826 event.ord = ep->ird;
1827
1828 if (ep->com.cm_id) {
1829
1830 CTR2(KTR_IW_CXGBE, "%s:eu1 %p", __func__, ep);
1831 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1832 set_bit(ESTAB_UPCALL, &ep->com.history);
1833 }
1834 CTR2(KTR_IW_CXGBE, "%s:euE %p", __func__, ep);
1835 }
1836
1837
1838 #define RELAXED_IRD_NEGOTIATION 1
1839
1840 /*
1841 * process_mpa_reply - process streaming mode MPA reply
1842 *
1843 * Returns:
1844 *
1845 * 0 upon success indicating a connect request was delivered to the ULP
1846 * or the mpa request is incomplete but valid so far.
1847 *
1848 * 1 if a failure requires the caller to close the connection.
1849 *
1850 * 2 if a failure requires the caller to abort the connection.
1851 */
process_mpa_reply(struct c4iw_ep * ep)1852 static int process_mpa_reply(struct c4iw_ep *ep)
1853 {
1854 struct mpa_message *mpa;
1855 struct mpa_v2_conn_params *mpa_v2_params;
1856 u16 plen;
1857 u16 resp_ird, resp_ord;
1858 u8 rtr_mismatch = 0, insuff_ird = 0;
1859 struct c4iw_qp_attributes attrs = {0};
1860 enum c4iw_qp_attr_mask mask;
1861 int err;
1862 struct mbuf *top, *m;
1863 int flags = MSG_DONTWAIT;
1864 struct uio uio;
1865 int disconnect = 0;
1866
1867 CTR2(KTR_IW_CXGBE, "%s:pmrB %p", __func__, ep);
1868
1869 /*
1870 * Stop mpa timer. If it expired, then
1871 * we ignore the MPA reply. process_timeout()
1872 * will abort the connection.
1873 */
1874 if (STOP_EP_TIMER(ep))
1875 return 0;
1876
1877 uio.uio_resid = 1000000;
1878 uio.uio_td = ep->com.thread;
1879 err = soreceive(ep->com.so, NULL, &uio, &top, NULL, &flags);
1880
1881 if (err) {
1882
1883 if (err == EWOULDBLOCK) {
1884
1885 CTR2(KTR_IW_CXGBE, "%s:pmr1 %p", __func__, ep);
1886 START_EP_TIMER(ep);
1887 return 0;
1888 }
1889 err = -err;
1890 CTR2(KTR_IW_CXGBE, "%s:pmr2 %p", __func__, ep);
1891 goto err;
1892 }
1893
1894 if (ep->com.so->so_rcv.sb_mb) {
1895
1896 CTR2(KTR_IW_CXGBE, "%s:pmr3 %p", __func__, ep);
1897 printf("%s data after soreceive called! so %p sb_mb %p top %p\n",
1898 __func__, ep->com.so, ep->com.so->so_rcv.sb_mb, top);
1899 }
1900
1901 m = top;
1902
1903 do {
1904
1905 CTR2(KTR_IW_CXGBE, "%s:pmr4 %p", __func__, ep);
1906 /*
1907 * If we get more than the supported amount of private data
1908 * then we must fail this connection.
1909 */
1910 if (ep->mpa_pkt_len + m->m_len > sizeof(ep->mpa_pkt)) {
1911
1912 CTR3(KTR_IW_CXGBE, "%s:pmr5 %p %d", __func__, ep,
1913 ep->mpa_pkt_len + m->m_len);
1914 err = (-EINVAL);
1915 goto err_stop_timer;
1916 }
1917
1918 /*
1919 * copy the new data into our accumulation buffer.
1920 */
1921 m_copydata(m, 0, m->m_len, &(ep->mpa_pkt[ep->mpa_pkt_len]));
1922 ep->mpa_pkt_len += m->m_len;
1923 if (!m->m_next)
1924 m = m->m_nextpkt;
1925 else
1926 m = m->m_next;
1927 } while (m);
1928
1929 m_freem(top);
1930 /*
1931 * if we don't even have the mpa message, then bail.
1932 */
1933 if (ep->mpa_pkt_len < sizeof(*mpa)) {
1934 return 0;
1935 }
1936 mpa = (struct mpa_message *) ep->mpa_pkt;
1937
1938 /* Validate MPA header. */
1939 if (mpa->revision > mpa_rev) {
1940
1941 CTR4(KTR_IW_CXGBE, "%s:pmr6 %p %d %d", __func__, ep,
1942 mpa->revision, mpa_rev);
1943 printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d, "
1944 " Received = %d\n", __func__, mpa_rev, mpa->revision);
1945 err = -EPROTO;
1946 goto err_stop_timer;
1947 }
1948
1949 if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
1950
1951 CTR2(KTR_IW_CXGBE, "%s:pmr7 %p", __func__, ep);
1952 err = -EPROTO;
1953 goto err_stop_timer;
1954 }
1955
1956 plen = ntohs(mpa->private_data_size);
1957
1958 /*
1959 * Fail if there's too much private data.
1960 */
1961 if (plen > MPA_MAX_PRIVATE_DATA) {
1962
1963 CTR2(KTR_IW_CXGBE, "%s:pmr8 %p", __func__, ep);
1964 err = -EPROTO;
1965 goto err_stop_timer;
1966 }
1967
1968 /*
1969 * If plen does not account for pkt size
1970 */
1971 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1972
1973 CTR2(KTR_IW_CXGBE, "%s:pmr9 %p", __func__, ep);
1974 STOP_EP_TIMER(ep);
1975 err = -EPROTO;
1976 goto err_stop_timer;
1977 }
1978
1979 ep->plen = (u8) plen;
1980
1981 /*
1982 * If we don't have all the pdata yet, then bail.
1983 * We'll continue process when more data arrives.
1984 */
1985 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen)) {
1986
1987 CTR2(KTR_IW_CXGBE, "%s:pmra %p", __func__, ep);
1988 return 0;
1989 }
1990
1991 if (mpa->flags & MPA_REJECT) {
1992
1993 CTR2(KTR_IW_CXGBE, "%s:pmrb %p", __func__, ep);
1994 err = -ECONNREFUSED;
1995 goto err_stop_timer;
1996 }
1997
1998 /*
1999 * If we get here we have accumulated the entire mpa
2000 * start reply message including private data. And
2001 * the MPA header is valid.
2002 */
2003 ep->com.state = FPDU_MODE;
2004 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
2005 ep->mpa_attr.recv_marker_enabled = markers_enabled;
2006 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
2007 ep->mpa_attr.version = mpa->revision;
2008 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
2009
2010 if (mpa->revision == 2) {
2011
2012 CTR2(KTR_IW_CXGBE, "%s:pmrc %p", __func__, ep);
2013 ep->mpa_attr.enhanced_rdma_conn =
2014 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
2015
2016 if (ep->mpa_attr.enhanced_rdma_conn) {
2017
2018 CTR2(KTR_IW_CXGBE, "%s:pmrd %p", __func__, ep);
2019 mpa_v2_params = (struct mpa_v2_conn_params *)
2020 (ep->mpa_pkt + sizeof(*mpa));
2021 resp_ird = ntohs(mpa_v2_params->ird) &
2022 MPA_V2_IRD_ORD_MASK;
2023 resp_ord = ntohs(mpa_v2_params->ord) &
2024 MPA_V2_IRD_ORD_MASK;
2025
2026 /*
2027 * This is a double-check. Ideally, below checks are
2028 * not required since ird/ord stuff has been taken
2029 * care of in c4iw_accept_cr
2030 */
2031 if (ep->ird < resp_ord) {
2032 if (RELAXED_IRD_NEGOTIATION && resp_ord <=
2033 ep->com.dev->rdev.adap->params.max_ordird_qp)
2034 ep->ird = resp_ord;
2035 else
2036 insuff_ird = 1;
2037 } else if (ep->ird > resp_ord) {
2038 ep->ird = resp_ord;
2039 }
2040 if (ep->ord > resp_ird) {
2041 if (RELAXED_IRD_NEGOTIATION)
2042 ep->ord = resp_ird;
2043 else
2044 insuff_ird = 1;
2045 }
2046 if (insuff_ird) {
2047 err = -ENOMEM;
2048 ep->ird = resp_ord;
2049 ep->ord = resp_ird;
2050 }
2051
2052 if (ntohs(mpa_v2_params->ird) &
2053 MPA_V2_PEER2PEER_MODEL) {
2054
2055 CTR2(KTR_IW_CXGBE, "%s:pmrf %p", __func__, ep);
2056 if (ntohs(mpa_v2_params->ord) &
2057 MPA_V2_RDMA_WRITE_RTR) {
2058
2059 CTR2(KTR_IW_CXGBE, "%s:pmrg %p", __func__, ep);
2060 ep->mpa_attr.p2p_type =
2061 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
2062 }
2063 else if (ntohs(mpa_v2_params->ord) &
2064 MPA_V2_RDMA_READ_RTR) {
2065
2066 CTR2(KTR_IW_CXGBE, "%s:pmrh %p", __func__, ep);
2067 ep->mpa_attr.p2p_type =
2068 FW_RI_INIT_P2PTYPE_READ_REQ;
2069 }
2070 }
2071 }
2072 } else {
2073
2074 CTR2(KTR_IW_CXGBE, "%s:pmri %p", __func__, ep);
2075
2076 if (mpa->revision == 1) {
2077
2078 CTR2(KTR_IW_CXGBE, "%s:pmrj %p", __func__, ep);
2079
2080 if (peer2peer) {
2081
2082 CTR2(KTR_IW_CXGBE, "%s:pmrk %p", __func__, ep);
2083 ep->mpa_attr.p2p_type = p2p_type;
2084 }
2085 }
2086 }
2087
2088 if (set_tcpinfo(ep)) {
2089
2090 CTR2(KTR_IW_CXGBE, "%s:pmrl %p", __func__, ep);
2091 printf("%s set_tcpinfo error\n", __func__);
2092 err = -ECONNRESET;
2093 goto err;
2094 }
2095
2096 CTR6(KTR_IW_CXGBE, "%s - crc_enabled = %d, recv_marker_enabled = %d, "
2097 "xmit_marker_enabled = %d, version = %d p2p_type = %d", __func__,
2098 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
2099 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
2100 ep->mpa_attr.p2p_type);
2101
2102 /*
2103 * If responder's RTR does not match with that of initiator, assign
2104 * FW_RI_INIT_P2PTYPE_DISABLED in mpa attributes so that RTR is not
2105 * generated when moving QP to RTS state.
2106 * A TERM message will be sent after QP has moved to RTS state
2107 */
2108 if ((ep->mpa_attr.version == 2) && peer2peer &&
2109 (ep->mpa_attr.p2p_type != p2p_type)) {
2110
2111 CTR2(KTR_IW_CXGBE, "%s:pmrm %p", __func__, ep);
2112 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
2113 rtr_mismatch = 1;
2114 }
2115
2116
2117 //ep->ofld_txq = TOEPCB(ep->com.so)->ofld_txq;
2118 attrs.mpa_attr = ep->mpa_attr;
2119 attrs.max_ird = ep->ird;
2120 attrs.max_ord = ep->ord;
2121 attrs.llp_stream_handle = ep;
2122 attrs.next_state = C4IW_QP_STATE_RTS;
2123
2124 mask = C4IW_QP_ATTR_NEXT_STATE |
2125 C4IW_QP_ATTR_LLP_STREAM_HANDLE | C4IW_QP_ATTR_MPA_ATTR |
2126 C4IW_QP_ATTR_MAX_IRD | C4IW_QP_ATTR_MAX_ORD;
2127
2128 /* bind QP and TID with INIT_WR */
2129 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp, mask, &attrs, 1);
2130
2131 if (err) {
2132
2133 CTR2(KTR_IW_CXGBE, "%s:pmrn %p", __func__, ep);
2134 goto err;
2135 }
2136
2137 /*
2138 * If responder's RTR requirement did not match with what initiator
2139 * supports, generate TERM message
2140 */
2141 if (rtr_mismatch) {
2142
2143 CTR2(KTR_IW_CXGBE, "%s:pmro %p", __func__, ep);
2144 printk(KERN_ERR "%s: RTR mismatch, sending TERM\n", __func__);
2145 attrs.layer_etype = LAYER_MPA | DDP_LLP;
2146 attrs.ecode = MPA_NOMATCH_RTR;
2147 attrs.next_state = C4IW_QP_STATE_TERMINATE;
2148 attrs.send_term = 1;
2149 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2150 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2151 err = -ENOMEM;
2152 disconnect = 1;
2153 goto out;
2154 }
2155
2156 /*
2157 * Generate TERM if initiator IRD is not sufficient for responder
2158 * provided ORD. Currently, we do the same behaviour even when
2159 * responder provided IRD is also not sufficient as regards to
2160 * initiator ORD.
2161 */
2162 if (insuff_ird) {
2163
2164 CTR2(KTR_IW_CXGBE, "%s:pmrp %p", __func__, ep);
2165 printk(KERN_ERR "%s: Insufficient IRD, sending TERM\n",
2166 __func__);
2167 attrs.layer_etype = LAYER_MPA | DDP_LLP;
2168 attrs.ecode = MPA_INSUFF_IRD;
2169 attrs.next_state = C4IW_QP_STATE_TERMINATE;
2170 attrs.send_term = 1;
2171 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2172 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2173 err = -ENOMEM;
2174 disconnect = 1;
2175 goto out;
2176 }
2177 goto out;
2178 err_stop_timer:
2179 STOP_EP_TIMER(ep);
2180 err:
2181 disconnect = 2;
2182 out:
2183 connect_reply_upcall(ep, err);
2184 CTR2(KTR_IW_CXGBE, "%s:pmrE %p", __func__, ep);
2185 return disconnect;
2186 }
2187
2188 /*
2189 * process_mpa_request - process streaming mode MPA request
2190 *
2191 * Returns:
2192 *
2193 * 0 upon success indicating a connect request was delivered to the ULP
2194 * or the mpa request is incomplete but valid so far.
2195 *
2196 * 1 if a failure requires the caller to close the connection.
2197 *
2198 * 2 if a failure requires the caller to abort the connection.
2199 */
2200 static int
process_mpa_request(struct c4iw_ep * ep)2201 process_mpa_request(struct c4iw_ep *ep)
2202 {
2203 struct mpa_message *mpa;
2204 struct mpa_v2_conn_params *mpa_v2_params;
2205 u16 plen;
2206 int flags = MSG_DONTWAIT;
2207 int rc;
2208 struct iovec iov;
2209 struct uio uio;
2210 enum c4iw_ep_state state = ep->com.state;
2211
2212 CTR3(KTR_IW_CXGBE, "%s: ep %p, state %s", __func__, ep, states[state]);
2213
2214 if (state != MPA_REQ_WAIT)
2215 return 0;
2216
2217 iov.iov_base = &ep->mpa_pkt[ep->mpa_pkt_len];
2218 iov.iov_len = sizeof(ep->mpa_pkt) - ep->mpa_pkt_len;
2219 uio.uio_iov = &iov;
2220 uio.uio_iovcnt = 1;
2221 uio.uio_offset = 0;
2222 uio.uio_resid = sizeof(ep->mpa_pkt) - ep->mpa_pkt_len;
2223 uio.uio_segflg = UIO_SYSSPACE;
2224 uio.uio_rw = UIO_READ;
2225 uio.uio_td = NULL; /* uio.uio_td = ep->com.thread; */
2226
2227 rc = soreceive(ep->com.so, NULL, &uio, NULL, NULL, &flags);
2228 if (rc == EAGAIN)
2229 return 0;
2230 else if (rc)
2231 goto err_stop_timer;
2232
2233 KASSERT(uio.uio_offset > 0, ("%s: sorecieve on so %p read no data",
2234 __func__, ep->com.so));
2235 ep->mpa_pkt_len += uio.uio_offset;
2236
2237 /*
2238 * If we get more than the supported amount of private data then we must
2239 * fail this connection. XXX: check so_rcv->sb_cc, or peek with another
2240 * soreceive, or increase the size of mpa_pkt by 1 and abort if the last
2241 * byte is filled by the soreceive above.
2242 */
2243
2244 /* Don't even have the MPA message. Wait for more data to arrive. */
2245 if (ep->mpa_pkt_len < sizeof(*mpa))
2246 return 0;
2247 mpa = (struct mpa_message *) ep->mpa_pkt;
2248
2249 /*
2250 * Validate MPA Header.
2251 */
2252 if (mpa->revision > mpa_rev) {
2253 log(LOG_ERR, "%s: MPA version mismatch. Local = %d,"
2254 " Received = %d\n", __func__, mpa_rev, mpa->revision);
2255 goto err_stop_timer;
2256 }
2257
2258 if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key)))
2259 goto err_stop_timer;
2260
2261 /*
2262 * Fail if there's too much private data.
2263 */
2264 plen = ntohs(mpa->private_data_size);
2265 if (plen > MPA_MAX_PRIVATE_DATA)
2266 goto err_stop_timer;
2267
2268 /*
2269 * If plen does not account for pkt size
2270 */
2271 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen))
2272 goto err_stop_timer;
2273
2274 ep->plen = (u8) plen;
2275
2276 /*
2277 * If we don't have all the pdata yet, then bail.
2278 */
2279 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
2280 return 0;
2281
2282 /*
2283 * If we get here we have accumulated the entire mpa
2284 * start reply message including private data.
2285 */
2286 ep->mpa_attr.initiator = 0;
2287 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
2288 ep->mpa_attr.recv_marker_enabled = markers_enabled;
2289 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
2290 ep->mpa_attr.version = mpa->revision;
2291 if (mpa->revision == 1)
2292 ep->tried_with_mpa_v1 = 1;
2293 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
2294
2295 if (mpa->revision == 2) {
2296 ep->mpa_attr.enhanced_rdma_conn =
2297 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
2298 if (ep->mpa_attr.enhanced_rdma_conn) {
2299 mpa_v2_params = (struct mpa_v2_conn_params *)
2300 (ep->mpa_pkt + sizeof(*mpa));
2301 ep->ird = ntohs(mpa_v2_params->ird) &
2302 MPA_V2_IRD_ORD_MASK;
2303 ep->ird = min_t(u32, ep->ird,
2304 cur_max_read_depth(ep->com.dev));
2305 ep->ord = ntohs(mpa_v2_params->ord) &
2306 MPA_V2_IRD_ORD_MASK;
2307 ep->ord = min_t(u32, ep->ord,
2308 cur_max_read_depth(ep->com.dev));
2309 CTR3(KTR_IW_CXGBE, "%s initiator ird %u ord %u",
2310 __func__, ep->ird, ep->ord);
2311 if (ntohs(mpa_v2_params->ird) & MPA_V2_PEER2PEER_MODEL)
2312 if (peer2peer) {
2313 if (ntohs(mpa_v2_params->ord) &
2314 MPA_V2_RDMA_WRITE_RTR)
2315 ep->mpa_attr.p2p_type =
2316 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
2317 else if (ntohs(mpa_v2_params->ord) &
2318 MPA_V2_RDMA_READ_RTR)
2319 ep->mpa_attr.p2p_type =
2320 FW_RI_INIT_P2PTYPE_READ_REQ;
2321 }
2322 }
2323 } else if (mpa->revision == 1 && peer2peer)
2324 ep->mpa_attr.p2p_type = p2p_type;
2325
2326 if (set_tcpinfo(ep))
2327 goto err_stop_timer;
2328
2329 CTR5(KTR_IW_CXGBE, "%s: crc_enabled = %d, recv_marker_enabled = %d, "
2330 "xmit_marker_enabled = %d, version = %d", __func__,
2331 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
2332 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version);
2333
2334 ep->com.state = MPA_REQ_RCVD;
2335 STOP_EP_TIMER(ep);
2336
2337 /* drive upcall */
2338 if (ep->parent_ep->com.state != DEAD)
2339 if (connect_request_upcall(ep))
2340 goto err_out;
2341 return 0;
2342
2343 err_stop_timer:
2344 STOP_EP_TIMER(ep);
2345 err_out:
2346 return 2;
2347 }
2348
2349 /*
2350 * Upcall from the adapter indicating data has been transmitted.
2351 * For us its just the single MPA request or reply. We can now free
2352 * the skb holding the mpa message.
2353 */
c4iw_reject_cr(struct iw_cm_id * cm_id,const void * pdata,u8 pdata_len)2354 int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
2355 {
2356 #ifdef KTR
2357 int err;
2358 #endif
2359 struct c4iw_ep *ep = to_ep(cm_id);
2360 int abort = 0;
2361
2362 mutex_lock(&ep->com.mutex);
2363 CTR2(KTR_IW_CXGBE, "%s:crcB %p", __func__, ep);
2364
2365 if ((ep->com.state == DEAD) ||
2366 (ep->com.state != MPA_REQ_RCVD)) {
2367
2368 CTR2(KTR_IW_CXGBE, "%s:crc1 %p", __func__, ep);
2369 mutex_unlock(&ep->com.mutex);
2370 c4iw_put_ep(&ep->com);
2371 return -ECONNRESET;
2372 }
2373 set_bit(ULP_REJECT, &ep->com.history);
2374
2375 if (mpa_rev == 0) {
2376
2377 CTR2(KTR_IW_CXGBE, "%s:crc2 %p", __func__, ep);
2378 abort = 1;
2379 }
2380 else {
2381
2382 CTR2(KTR_IW_CXGBE, "%s:crc3 %p", __func__, ep);
2383 abort = send_mpa_reject(ep, pdata, pdata_len);
2384 }
2385 STOP_EP_TIMER(ep);
2386 #ifdef KTR
2387 err = c4iw_ep_disconnect(ep, abort != 0, GFP_KERNEL);
2388 #else
2389 c4iw_ep_disconnect(ep, abort != 0, GFP_KERNEL);
2390 #endif
2391 mutex_unlock(&ep->com.mutex);
2392 c4iw_put_ep(&ep->com);
2393 CTR3(KTR_IW_CXGBE, "%s:crc4 %p, err: %d", __func__, ep, err);
2394 return 0;
2395 }
2396
c4iw_accept_cr(struct iw_cm_id * cm_id,struct iw_cm_conn_param * conn_param)2397 int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2398 {
2399 int err;
2400 struct c4iw_qp_attributes attrs = {0};
2401 enum c4iw_qp_attr_mask mask;
2402 struct c4iw_ep *ep = to_ep(cm_id);
2403 struct c4iw_dev *h = to_c4iw_dev(cm_id->device);
2404 struct c4iw_qp *qp = get_qhp(h, conn_param->qpn);
2405 int abort = 0;
2406
2407 mutex_lock(&ep->com.mutex);
2408 CTR2(KTR_IW_CXGBE, "%s:cacB %p", __func__, ep);
2409
2410 if ((ep->com.state == DEAD) ||
2411 (ep->com.state != MPA_REQ_RCVD)) {
2412
2413 CTR2(KTR_IW_CXGBE, "%s:cac1 %p", __func__, ep);
2414 err = -ECONNRESET;
2415 goto err_out;
2416 }
2417
2418 BUG_ON(!qp);
2419
2420 set_bit(ULP_ACCEPT, &ep->com.history);
2421
2422 if ((conn_param->ord > c4iw_max_read_depth) ||
2423 (conn_param->ird > c4iw_max_read_depth)) {
2424
2425 CTR2(KTR_IW_CXGBE, "%s:cac2 %p", __func__, ep);
2426 err = -EINVAL;
2427 goto err_abort;
2428 }
2429
2430 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
2431
2432 CTR2(KTR_IW_CXGBE, "%s:cac3 %p", __func__, ep);
2433
2434 if (conn_param->ord > ep->ird) {
2435 if (RELAXED_IRD_NEGOTIATION) {
2436 conn_param->ord = ep->ird;
2437 } else {
2438 ep->ird = conn_param->ird;
2439 ep->ord = conn_param->ord;
2440 send_mpa_reject(ep, conn_param->private_data,
2441 conn_param->private_data_len);
2442 err = -ENOMEM;
2443 goto err_abort;
2444 }
2445 }
2446 if (conn_param->ird < ep->ord) {
2447 if (RELAXED_IRD_NEGOTIATION &&
2448 ep->ord <= h->rdev.adap->params.max_ordird_qp) {
2449 conn_param->ird = ep->ord;
2450 } else {
2451 err = -ENOMEM;
2452 goto err_abort;
2453 }
2454 }
2455 }
2456 ep->ird = conn_param->ird;
2457 ep->ord = conn_param->ord;
2458
2459 if (ep->mpa_attr.version == 1) {
2460 if (peer2peer && ep->ird == 0)
2461 ep->ird = 1;
2462 } else {
2463 if (peer2peer &&
2464 (ep->mpa_attr.p2p_type != FW_RI_INIT_P2PTYPE_DISABLED) &&
2465 (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ) && ep->ird == 0)
2466 ep->ird = 1;
2467 }
2468
2469 CTR4(KTR_IW_CXGBE, "%s %d ird %d ord %d", __func__, __LINE__,
2470 ep->ird, ep->ord);
2471
2472 ep->com.cm_id = cm_id;
2473 ref_cm_id(&ep->com);
2474 ep->com.qp = qp;
2475 ref_qp(ep);
2476 //ep->ofld_txq = TOEPCB(ep->com.so)->ofld_txq;
2477
2478 /* bind QP to EP and move to RTS */
2479 attrs.mpa_attr = ep->mpa_attr;
2480 attrs.max_ird = ep->ird;
2481 attrs.max_ord = ep->ord;
2482 attrs.llp_stream_handle = ep;
2483 attrs.next_state = C4IW_QP_STATE_RTS;
2484
2485 /* bind QP and TID with INIT_WR */
2486 mask = C4IW_QP_ATTR_NEXT_STATE |
2487 C4IW_QP_ATTR_LLP_STREAM_HANDLE |
2488 C4IW_QP_ATTR_MPA_ATTR |
2489 C4IW_QP_ATTR_MAX_IRD |
2490 C4IW_QP_ATTR_MAX_ORD;
2491
2492 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp, mask, &attrs, 1);
2493 if (err) {
2494 CTR3(KTR_IW_CXGBE, "%s:caca %p, err: %d", __func__, ep, err);
2495 goto err_defef_cm_id;
2496 }
2497
2498 err = send_mpa_reply(ep, conn_param->private_data,
2499 conn_param->private_data_len);
2500 if (err) {
2501 CTR3(KTR_IW_CXGBE, "%s:cacb %p, err: %d", __func__, ep, err);
2502 goto err_defef_cm_id;
2503 }
2504
2505 ep->com.state = FPDU_MODE;
2506 established_upcall(ep);
2507 mutex_unlock(&ep->com.mutex);
2508 c4iw_put_ep(&ep->com);
2509 CTR2(KTR_IW_CXGBE, "%s:cacE %p", __func__, ep);
2510 return 0;
2511 err_defef_cm_id:
2512 deref_cm_id(&ep->com);
2513 err_abort:
2514 abort = 1;
2515 err_out:
2516 if (abort)
2517 c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
2518 mutex_unlock(&ep->com.mutex);
2519 c4iw_put_ep(&ep->com);
2520 CTR2(KTR_IW_CXGBE, "%s:cacE err %p", __func__, ep);
2521 return err;
2522 }
2523
2524 static int
c4iw_sock_create(struct sockaddr_storage * laddr,struct socket ** so)2525 c4iw_sock_create(struct sockaddr_storage *laddr, struct socket **so)
2526 {
2527 int ret;
2528 int size, on;
2529 struct socket *sock = NULL;
2530 struct sockopt sopt;
2531
2532 ret = sock_create_kern(laddr->ss_family,
2533 SOCK_STREAM, IPPROTO_TCP, &sock);
2534 if (ret) {
2535 CTR2(KTR_IW_CXGBE, "%s:Failed to create TCP socket. err %d",
2536 __func__, ret);
2537 return ret;
2538 }
2539
2540 if (reuseaddr) {
2541 bzero(&sopt, sizeof(struct sockopt));
2542 sopt.sopt_dir = SOPT_SET;
2543 sopt.sopt_level = SOL_SOCKET;
2544 sopt.sopt_name = SO_REUSEADDR;
2545 on = 1;
2546 sopt.sopt_val = &on;
2547 sopt.sopt_valsize = sizeof(on);
2548 ret = -sosetopt(sock, &sopt);
2549 if (ret != 0) {
2550 log(LOG_ERR, "%s: sosetopt(%p, SO_REUSEADDR) "
2551 "failed with %d.\n", __func__, sock, ret);
2552 }
2553 bzero(&sopt, sizeof(struct sockopt));
2554 sopt.sopt_dir = SOPT_SET;
2555 sopt.sopt_level = SOL_SOCKET;
2556 sopt.sopt_name = SO_REUSEPORT;
2557 on = 1;
2558 sopt.sopt_val = &on;
2559 sopt.sopt_valsize = sizeof(on);
2560 ret = -sosetopt(sock, &sopt);
2561 if (ret != 0) {
2562 log(LOG_ERR, "%s: sosetopt(%p, SO_REUSEPORT) "
2563 "failed with %d.\n", __func__, sock, ret);
2564 }
2565 }
2566
2567 ret = -sobind(sock, (struct sockaddr *)laddr, curthread);
2568 if (ret) {
2569 CTR2(KTR_IW_CXGBE, "%s:Failed to bind socket. err %p",
2570 __func__, ret);
2571 sock_release(sock);
2572 return ret;
2573 }
2574
2575 size = laddr->ss_family == AF_INET6 ?
2576 sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in);
2577 ret = sock_getname(sock, (struct sockaddr *)laddr, &size, 0);
2578 if (ret) {
2579 CTR2(KTR_IW_CXGBE, "%s:sock_getname failed. err %p",
2580 __func__, ret);
2581 sock_release(sock);
2582 return ret;
2583 }
2584
2585 *so = sock;
2586 return 0;
2587 }
2588
c4iw_connect(struct iw_cm_id * cm_id,struct iw_cm_conn_param * conn_param)2589 int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2590 {
2591 int err = 0;
2592 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
2593 struct c4iw_ep *ep = NULL;
2594 struct ifnet *nh_ifp; /* Logical egress interface */
2595 struct epoch_tracker et;
2596 #ifdef VIMAGE
2597 struct rdma_cm_id *rdma_id = (struct rdma_cm_id*)cm_id->context;
2598 struct vnet *vnet = rdma_id->route.addr.dev_addr.net;
2599 #endif
2600
2601 CTR2(KTR_IW_CXGBE, "%s:ccB %p", __func__, cm_id);
2602
2603
2604 if ((conn_param->ord > c4iw_max_read_depth) ||
2605 (conn_param->ird > c4iw_max_read_depth)) {
2606
2607 CTR2(KTR_IW_CXGBE, "%s:cc1 %p", __func__, cm_id);
2608 err = -EINVAL;
2609 goto out;
2610 }
2611 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
2612 cm_id->provider_data = ep;
2613
2614 init_timer(&ep->timer);
2615 ep->plen = conn_param->private_data_len;
2616
2617 if (ep->plen) {
2618
2619 CTR2(KTR_IW_CXGBE, "%s:cc3 %p", __func__, ep);
2620 memcpy(ep->mpa_pkt + sizeof(struct mpa_message),
2621 conn_param->private_data, ep->plen);
2622 }
2623 ep->ird = conn_param->ird;
2624 ep->ord = conn_param->ord;
2625
2626 if (peer2peer && ep->ord == 0) {
2627
2628 CTR2(KTR_IW_CXGBE, "%s:cc4 %p", __func__, ep);
2629 ep->ord = 1;
2630 }
2631
2632 ep->com.dev = dev;
2633 ep->com.cm_id = cm_id;
2634 ref_cm_id(&ep->com);
2635 ep->com.qp = get_qhp(dev, conn_param->qpn);
2636
2637 if (!ep->com.qp) {
2638
2639 CTR2(KTR_IW_CXGBE, "%s:cc5 %p", __func__, ep);
2640 err = -EINVAL;
2641 goto fail;
2642 }
2643 ref_qp(ep);
2644 ep->com.thread = curthread;
2645
2646 NET_EPOCH_ENTER(et);
2647 CURVNET_SET(vnet);
2648 err = get_ifnet_from_raddr(&cm_id->remote_addr, &nh_ifp);
2649 CURVNET_RESTORE();
2650 NET_EPOCH_EXIT(et);
2651
2652 if (err) {
2653
2654 CTR2(KTR_IW_CXGBE, "%s:cc7 %p", __func__, ep);
2655 printk(KERN_ERR MOD "%s - cannot find route.\n", __func__);
2656 err = EHOSTUNREACH;
2657 return err;
2658 }
2659
2660 if (!(nh_ifp->if_capenable & IFCAP_TOE) ||
2661 TOEDEV(nh_ifp) == NULL) {
2662 err = -ENOPROTOOPT;
2663 goto fail;
2664 }
2665 ep->com.state = CONNECTING;
2666 ep->tos = 0;
2667 ep->com.local_addr = cm_id->local_addr;
2668 ep->com.remote_addr = cm_id->remote_addr;
2669
2670 err = c4iw_sock_create(&cm_id->local_addr, &ep->com.so);
2671 if (err)
2672 goto fail;
2673
2674 setiwsockopt(ep->com.so);
2675 init_iwarp_socket(ep->com.so, &ep->com);
2676 err = -soconnect(ep->com.so, (struct sockaddr *)&ep->com.remote_addr,
2677 ep->com.thread);
2678 if (err)
2679 goto fail_free_so;
2680 CTR2(KTR_IW_CXGBE, "%s:ccE, ep %p", __func__, ep);
2681 return 0;
2682
2683 fail_free_so:
2684 uninit_iwarp_socket(ep->com.so);
2685 ep->com.state = DEAD;
2686 sock_release(ep->com.so);
2687 fail:
2688 deref_cm_id(&ep->com);
2689 c4iw_put_ep(&ep->com);
2690 ep = NULL;
2691 out:
2692 CTR2(KTR_IW_CXGBE, "%s:ccE Error %d", __func__, err);
2693 return err;
2694 }
2695
2696 /*
2697 * iwcm->create_listen. Returns -errno on failure.
2698 */
2699 int
c4iw_create_listen(struct iw_cm_id * cm_id,int backlog)2700 c4iw_create_listen(struct iw_cm_id *cm_id, int backlog)
2701 {
2702 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
2703 struct c4iw_listen_ep *lep = NULL;
2704 struct listen_port_info *port_info = NULL;
2705 int rc = 0;
2706
2707 CTR3(KTR_IW_CXGBE, "%s: cm_id %p, backlog %s", __func__, cm_id,
2708 backlog);
2709 if (c4iw_fatal_error(&dev->rdev)) {
2710 CTR2(KTR_IW_CXGBE, "%s: cm_id %p, fatal error", __func__,
2711 cm_id);
2712 return -EIO;
2713 }
2714 lep = alloc_ep(sizeof(*lep), GFP_KERNEL);
2715 lep->com.cm_id = cm_id;
2716 ref_cm_id(&lep->com);
2717 lep->com.dev = dev;
2718 lep->backlog = backlog;
2719 lep->com.local_addr = cm_id->local_addr;
2720 lep->com.thread = curthread;
2721 cm_id->provider_data = lep;
2722 lep->com.state = LISTEN;
2723
2724 /* In case of INDADDR_ANY, ibcore creates cmid for each device and
2725 * invokes iw_cxgbe listener callbacks assuming that iw_cxgbe creates
2726 * HW listeners for each device seperately. But toecore expects single
2727 * solisten() call with INADDR_ANY address to create HW listeners on
2728 * all devices for a given port number. So iw_cxgbe driver calls
2729 * solisten() only once for INADDR_ANY(usually done at first time
2730 * listener callback from ibcore). And all the subsequent INADDR_ANY
2731 * listener callbacks from ibcore(for the same port address) do not
2732 * invoke solisten() as first listener callback has already created
2733 * listeners for all other devices(via solisten).
2734 */
2735 if (c4iw_any_addr((struct sockaddr *)&lep->com.local_addr)) {
2736 port_info = add_ep_to_listenlist(lep);
2737 /* skip solisten() if refcnt > 1, as the listeners were
2738 * already created by 'Master lep'
2739 */
2740 if (port_info->refcnt > 1) {
2741 /* As there will be only one listener socket for a TCP
2742 * port, copy Master lep's socket pointer to other lep's
2743 * that are belonging to same TCP port.
2744 */
2745 struct c4iw_listen_ep *head_lep =
2746 container_of(port_info->lep_list.next,
2747 struct c4iw_listen_ep, listen_ep_list);
2748 lep->com.so = head_lep->com.so;
2749 goto out;
2750 }
2751 }
2752 rc = c4iw_sock_create(&cm_id->local_addr, &lep->com.so);
2753 if (rc) {
2754 CTR2(KTR_IW_CXGBE, "%s:Failed to create socket. err %d",
2755 __func__, rc);
2756 goto fail;
2757 }
2758
2759 rc = -solisten(lep->com.so, backlog, curthread);
2760 if (rc) {
2761 CTR3(KTR_IW_CXGBE, "%s:Failed to listen on sock:%p. err %d",
2762 __func__, lep->com.so, rc);
2763 goto fail_free_so;
2764 }
2765 init_iwarp_socket(lep->com.so, &lep->com);
2766 out:
2767 return 0;
2768
2769 fail_free_so:
2770 sock_release(lep->com.so);
2771 fail:
2772 if (port_info)
2773 rem_ep_from_listenlist(lep);
2774 deref_cm_id(&lep->com);
2775 c4iw_put_ep(&lep->com);
2776 return rc;
2777 }
2778
2779 int
c4iw_destroy_listen(struct iw_cm_id * cm_id)2780 c4iw_destroy_listen(struct iw_cm_id *cm_id)
2781 {
2782 struct c4iw_listen_ep *lep = to_listen_ep(cm_id);
2783
2784 mutex_lock(&lep->com.mutex);
2785 CTR3(KTR_IW_CXGBE, "%s: cm_id %p, state %s", __func__, cm_id,
2786 states[lep->com.state]);
2787
2788 lep->com.state = DEAD;
2789 if (c4iw_any_addr((struct sockaddr *)&lep->com.local_addr)) {
2790 /* if no refcount then close listen socket */
2791 if (!rem_ep_from_listenlist(lep))
2792 close_socket(lep->com.so);
2793 } else
2794 close_socket(lep->com.so);
2795 deref_cm_id(&lep->com);
2796 mutex_unlock(&lep->com.mutex);
2797 c4iw_put_ep(&lep->com);
2798 return 0;
2799 }
2800
__c4iw_ep_disconnect(struct c4iw_ep * ep,int abrupt,gfp_t gfp)2801 int __c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp)
2802 {
2803 int ret;
2804 mutex_lock(&ep->com.mutex);
2805 ret = c4iw_ep_disconnect(ep, abrupt, gfp);
2806 mutex_unlock(&ep->com.mutex);
2807 return ret;
2808 }
2809
c4iw_ep_disconnect(struct c4iw_ep * ep,int abrupt,gfp_t gfp)2810 int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp)
2811 {
2812 int ret = 0;
2813 int close = 0;
2814 struct c4iw_rdev *rdev;
2815
2816
2817 CTR2(KTR_IW_CXGBE, "%s:cedB %p", __func__, ep);
2818
2819 rdev = &ep->com.dev->rdev;
2820
2821 if (c4iw_fatal_error(rdev)) {
2822 CTR3(KTR_IW_CXGBE, "%s:ced1 fatal error %p %s", __func__, ep,
2823 states[ep->com.state]);
2824 if (ep->com.state != DEAD) {
2825 send_abort(ep);
2826 ep->com.state = DEAD;
2827 }
2828 close_complete_upcall(ep, -ECONNRESET);
2829 return ECONNRESET;
2830 }
2831 CTR3(KTR_IW_CXGBE, "%s:ced2 %p %s", __func__, ep,
2832 states[ep->com.state]);
2833
2834 /*
2835 * Ref the ep here in case we have fatal errors causing the
2836 * ep to be released and freed.
2837 */
2838 c4iw_get_ep(&ep->com);
2839 switch (ep->com.state) {
2840
2841 case MPA_REQ_WAIT:
2842 case MPA_REQ_SENT:
2843 case MPA_REQ_RCVD:
2844 case MPA_REP_SENT:
2845 case FPDU_MODE:
2846 close = 1;
2847 if (abrupt)
2848 ep->com.state = ABORTING;
2849 else {
2850 ep->com.state = CLOSING;
2851 START_EP_TIMER(ep);
2852 }
2853 set_bit(CLOSE_SENT, &ep->com.flags);
2854 break;
2855
2856 case CLOSING:
2857
2858 if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
2859
2860 close = 1;
2861 if (abrupt) {
2862 STOP_EP_TIMER(ep);
2863 ep->com.state = ABORTING;
2864 } else
2865 ep->com.state = MORIBUND;
2866 }
2867 break;
2868
2869 case MORIBUND:
2870 case ABORTING:
2871 case DEAD:
2872 CTR3(KTR_IW_CXGBE,
2873 "%s ignoring disconnect ep %p state %u", __func__,
2874 ep, ep->com.state);
2875 break;
2876
2877 default:
2878 BUG();
2879 break;
2880 }
2881
2882
2883 if (close) {
2884
2885 CTR2(KTR_IW_CXGBE, "%s:ced3 %p", __func__, ep);
2886
2887 if (abrupt) {
2888
2889 CTR2(KTR_IW_CXGBE, "%s:ced4 %p", __func__, ep);
2890 set_bit(EP_DISC_ABORT, &ep->com.history);
2891 close_complete_upcall(ep, -ECONNRESET);
2892 send_abort(ep);
2893 } else {
2894
2895 CTR2(KTR_IW_CXGBE, "%s:ced5 %p", __func__, ep);
2896 set_bit(EP_DISC_CLOSE, &ep->com.history);
2897
2898 if (!ep->parent_ep)
2899 ep->com.state = MORIBUND;
2900
2901 CURVNET_SET(ep->com.so->so_vnet);
2902 ret = sodisconnect(ep->com.so);
2903 CURVNET_RESTORE();
2904 if (ret) {
2905 CTR2(KTR_IW_CXGBE, "%s:ced6 %p", __func__, ep);
2906 STOP_EP_TIMER(ep);
2907 send_abort(ep);
2908 ep->com.state = DEAD;
2909 close_complete_upcall(ep, -ECONNRESET);
2910 set_bit(EP_DISC_FAIL, &ep->com.history);
2911 if (ep->com.qp) {
2912 struct c4iw_qp_attributes attrs = {0};
2913
2914 attrs.next_state = C4IW_QP_STATE_ERROR;
2915 ret = c4iw_modify_qp(
2916 ep->com.dev, ep->com.qp,
2917 C4IW_QP_ATTR_NEXT_STATE,
2918 &attrs, 1);
2919 CTR3(KTR_IW_CXGBE, "%s:ced7 %p ret %d",
2920 __func__, ep, ret);
2921 }
2922 }
2923 }
2924 }
2925 c4iw_put_ep(&ep->com);
2926 CTR2(KTR_IW_CXGBE, "%s:cedE %p", __func__, ep);
2927 return ret;
2928 }
2929
2930 #ifdef C4IW_EP_REDIRECT
c4iw_ep_redirect(void * ctx,struct dst_entry * old,struct dst_entry * new,struct l2t_entry * l2t)2931 int c4iw_ep_redirect(void *ctx, struct dst_entry *old, struct dst_entry *new,
2932 struct l2t_entry *l2t)
2933 {
2934 struct c4iw_ep *ep = ctx;
2935
2936 if (ep->dst != old)
2937 return 0;
2938
2939 PDBG("%s ep %p redirect to dst %p l2t %p\n", __func__, ep, new,
2940 l2t);
2941 dst_hold(new);
2942 cxgb4_l2t_release(ep->l2t);
2943 ep->l2t = l2t;
2944 dst_release(old);
2945 ep->dst = new;
2946 return 1;
2947 }
2948 #endif
2949
2950
2951
ep_timeout(unsigned long arg)2952 static void ep_timeout(unsigned long arg)
2953 {
2954 struct c4iw_ep *ep = (struct c4iw_ep *)arg;
2955
2956 if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
2957
2958 /*
2959 * Only insert if it is not already on the list.
2960 */
2961 if (!(ep->com.ep_events & C4IW_EVENT_TIMEOUT)) {
2962 CTR2(KTR_IW_CXGBE, "%s:et1 %p", __func__, ep);
2963 add_ep_to_req_list(ep, C4IW_EVENT_TIMEOUT);
2964 }
2965 }
2966 }
2967
fw6_wr_rpl(struct adapter * sc,const __be64 * rpl)2968 static int fw6_wr_rpl(struct adapter *sc, const __be64 *rpl)
2969 {
2970 uint64_t val = be64toh(*rpl);
2971 int ret;
2972 struct c4iw_wr_wait *wr_waitp;
2973
2974 ret = (int)((val >> 8) & 0xff);
2975 wr_waitp = (struct c4iw_wr_wait *)rpl[1];
2976 CTR3(KTR_IW_CXGBE, "%s wr_waitp %p ret %u", __func__, wr_waitp, ret);
2977 if (wr_waitp)
2978 c4iw_wake_up(wr_waitp, ret ? -ret : 0);
2979
2980 return (0);
2981 }
2982
fw6_cqe_handler(struct adapter * sc,const __be64 * rpl)2983 static int fw6_cqe_handler(struct adapter *sc, const __be64 *rpl)
2984 {
2985 struct cqe_list_entry *cle;
2986 unsigned long flag;
2987
2988 cle = malloc(sizeof(*cle), M_CXGBE, M_NOWAIT);
2989 cle->rhp = sc->iwarp_softc;
2990 cle->err_cqe = *(const struct t4_cqe *)(&rpl[0]);
2991
2992 spin_lock_irqsave(&err_cqe_lock, flag);
2993 list_add_tail(&cle->entry, &err_cqe_list);
2994 queue_work(c4iw_taskq, &c4iw_task);
2995 spin_unlock_irqrestore(&err_cqe_lock, flag);
2996
2997 return (0);
2998 }
2999
3000 static int
process_terminate(struct c4iw_ep * ep)3001 process_terminate(struct c4iw_ep *ep)
3002 {
3003 struct c4iw_qp_attributes attrs = {0};
3004
3005 CTR2(KTR_IW_CXGBE, "%s:tB %p %d", __func__, ep);
3006
3007 if (ep && ep->com.qp) {
3008
3009 printk(KERN_WARNING MOD "TERM received tid %u qpid %u\n",
3010 ep->hwtid, ep->com.qp->wq.sq.qid);
3011 attrs.next_state = C4IW_QP_STATE_TERMINATE;
3012 c4iw_modify_qp(ep->com.dev, ep->com.qp, C4IW_QP_ATTR_NEXT_STATE, &attrs,
3013 1);
3014 } else
3015 printk(KERN_WARNING MOD "TERM received tid %u no ep/qp\n",
3016 ep->hwtid);
3017 CTR2(KTR_IW_CXGBE, "%s:tE %p %d", __func__, ep);
3018
3019 return 0;
3020 }
3021
c4iw_cm_init(void)3022 int __init c4iw_cm_init(void)
3023 {
3024
3025 t4_register_cpl_handler(CPL_RDMA_TERMINATE, terminate);
3026 t4_register_fw_msg_handler(FW6_TYPE_WR_RPL, fw6_wr_rpl);
3027 t4_register_fw_msg_handler(FW6_TYPE_CQE, fw6_cqe_handler);
3028 t4_register_an_handler(c4iw_ev_handler);
3029
3030 TAILQ_INIT(&req_list);
3031 spin_lock_init(&req_lock);
3032 INIT_LIST_HEAD(&err_cqe_list);
3033 spin_lock_init(&err_cqe_lock);
3034
3035 INIT_WORK(&c4iw_task, process_req);
3036
3037 c4iw_taskq = create_singlethread_workqueue("iw_cxgbe");
3038 if (!c4iw_taskq)
3039 return -ENOMEM;
3040
3041 return 0;
3042 }
3043
c4iw_cm_term(void)3044 void __exit c4iw_cm_term(void)
3045 {
3046 WARN_ON(!TAILQ_EMPTY(&req_list));
3047 WARN_ON(!list_empty(&err_cqe_list));
3048 flush_workqueue(c4iw_taskq);
3049 destroy_workqueue(c4iw_taskq);
3050
3051 t4_register_cpl_handler(CPL_RDMA_TERMINATE, NULL);
3052 t4_register_fw_msg_handler(FW6_TYPE_WR_RPL, NULL);
3053 t4_register_fw_msg_handler(FW6_TYPE_CQE, NULL);
3054 t4_register_an_handler(NULL);
3055 }
3056 #endif
3057