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(struct timer_list *t);
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 inpcb *__inp = sotoinpcb(so); \
149 KASSERT(__inp != NULL, \
150 ("GET_LOCAL_ADDR(%s):so:%p, inp = NULL", __func__, so)); \
151 if (__inp->inp_vflag & INP_IPV4) \
152 in_getsockaddr(so, (struct sockaddr *)pladdr); \
153 else \
154 in6_getsockaddr(so, (struct sockaddr *)pladdr); \
155 } while (0)
156
157 #define GET_REMOTE_ADDR(praddr, so) \
158 do { \
159 struct inpcb *__inp = sotoinpcb(so); \
160 KASSERT(__inp != NULL, \
161 ("GET_REMOTE_ADDR(%s):so:%p, inp = NULL", __func__, so)); \
162 if (__inp->inp_vflag & INP_IPV4) \
163 in_getpeeraddr(so, (struct sockaddr *)praddr); \
164 else \
165 in6_getpeeraddr(so, (struct sockaddr *)praddr); \
166 } while (0)
167
168 static char *states[] = {
169 "idle",
170 "listen",
171 "connecting",
172 "mpa_wait_req",
173 "mpa_req_sent",
174 "mpa_req_rcvd",
175 "mpa_rep_sent",
176 "fpdu_mode",
177 "aborting",
178 "closing",
179 "moribund",
180 "dead",
181 NULL,
182 };
183
deref_cm_id(struct c4iw_ep_common * epc)184 static void deref_cm_id(struct c4iw_ep_common *epc)
185 {
186 epc->cm_id->rem_ref(epc->cm_id);
187 epc->cm_id = NULL;
188 set_bit(CM_ID_DEREFED, &epc->history);
189 }
190
ref_cm_id(struct c4iw_ep_common * epc)191 static void ref_cm_id(struct c4iw_ep_common *epc)
192 {
193 set_bit(CM_ID_REFED, &epc->history);
194 epc->cm_id->add_ref(epc->cm_id);
195 }
196
deref_qp(struct c4iw_ep * ep)197 static void deref_qp(struct c4iw_ep *ep)
198 {
199 c4iw_qp_rem_ref(&ep->com.qp->ibqp);
200 clear_bit(QP_REFERENCED, &ep->com.flags);
201 set_bit(QP_DEREFED, &ep->com.history);
202 }
203
ref_qp(struct c4iw_ep * ep)204 static void ref_qp(struct c4iw_ep *ep)
205 {
206 set_bit(QP_REFERENCED, &ep->com.flags);
207 set_bit(QP_REFED, &ep->com.history);
208 c4iw_qp_add_ref(&ep->com.qp->ibqp);
209 }
210 /* allocated per TCP port while listening */
211 struct listen_port_info {
212 uint16_t port_num; /* TCP port address */
213 struct list_head list; /* belongs to listen_port_list */
214 struct list_head lep_list; /* per port lep list */
215 uint32_t refcnt; /* number of lep's listening */
216 };
217
218 /*
219 * Following two lists are used to manage INADDR_ANY listeners:
220 * 1)listen_port_list
221 * 2)lep_list
222 *
223 * Below is the INADDR_ANY listener lists overview on a system with a two port
224 * adapter:
225 * |------------------|
226 * |listen_port_list |
227 * |------------------|
228 * |
229 * | |-----------| |-----------|
230 * | | port_num:X| | port_num:X|
231 * |--------------|-list------|-------|-list------|-------....
232 * | lep_list----| | lep_list----|
233 * | refcnt | | | refcnt | |
234 * | | | | | |
235 * | | | | | |
236 * |-----------| | |-----------| |
237 * | |
238 * | |
239 * | |
240 * | | lep1 lep2
241 * | | |----------------| |----------------|
242 * | |----| listen_ep_list |----| listen_ep_list |
243 * | |----------------| |----------------|
244 * |
245 * |
246 * | lep1 lep2
247 * | |----------------| |----------------|
248 * |---| listen_ep_list |----| listen_ep_list |
249 * |----------------| |----------------|
250 *
251 * Because of two port adapter, the number of lep's are two(lep1 & lep2) for
252 * each TCP port number.
253 *
254 * Here 'lep1' is always marked as Master lep, because solisten() is always
255 * called through first lep.
256 *
257 */
258 static struct listen_port_info *
add_ep_to_listenlist(struct c4iw_listen_ep * lep)259 add_ep_to_listenlist(struct c4iw_listen_ep *lep)
260 {
261 uint16_t port;
262 struct listen_port_info *port_info = NULL;
263 struct sockaddr_storage *laddr = &lep->com.local_addr;
264
265 port = (laddr->ss_family == AF_INET) ?
266 ((struct sockaddr_in *)laddr)->sin_port :
267 ((struct sockaddr_in6 *)laddr)->sin6_port;
268
269 mutex_lock(&listen_port_mutex);
270
271 list_for_each_entry(port_info, &listen_port_list, list)
272 if (port_info->port_num == port)
273 goto found_port;
274
275 port_info = malloc(sizeof(*port_info), M_CXGBE, M_WAITOK);
276 port_info->port_num = port;
277 port_info->refcnt = 0;
278
279 list_add_tail(&port_info->list, &listen_port_list);
280 INIT_LIST_HEAD(&port_info->lep_list);
281
282 found_port:
283 port_info->refcnt++;
284 list_add_tail(&lep->listen_ep_list, &port_info->lep_list);
285 mutex_unlock(&listen_port_mutex);
286 return port_info;
287 }
288
289 static int
rem_ep_from_listenlist(struct c4iw_listen_ep * lep)290 rem_ep_from_listenlist(struct c4iw_listen_ep *lep)
291 {
292 uint16_t port;
293 struct listen_port_info *port_info = NULL;
294 struct sockaddr_storage *laddr = &lep->com.local_addr;
295 int refcnt = 0;
296
297 port = (laddr->ss_family == AF_INET) ?
298 ((struct sockaddr_in *)laddr)->sin_port :
299 ((struct sockaddr_in6 *)laddr)->sin6_port;
300
301 mutex_lock(&listen_port_mutex);
302
303 /* get the port_info structure based on the lep's port address */
304 list_for_each_entry(port_info, &listen_port_list, list) {
305 if (port_info->port_num == port) {
306 port_info->refcnt--;
307 refcnt = port_info->refcnt;
308 /* remove the current lep from the listen list */
309 list_del(&lep->listen_ep_list);
310 if (port_info->refcnt == 0) {
311 /* Remove this entry from the list as there
312 * are no more listeners for this port_num.
313 */
314 list_del(&port_info->list);
315 kfree(port_info);
316 }
317 break;
318 }
319 }
320 mutex_unlock(&listen_port_mutex);
321 return refcnt;
322 }
323
324 /*
325 * Find the lep that belongs to the ifnet on which the SYN frame was received.
326 */
327 struct c4iw_listen_ep *
find_real_listen_ep(struct c4iw_listen_ep * master_lep,struct socket * so)328 find_real_listen_ep(struct c4iw_listen_ep *master_lep, struct socket *so)
329 {
330 struct adapter *adap = NULL;
331 struct c4iw_listen_ep *lep = NULL;
332 if_t ifp = NULL, hw_ifp = NULL;
333 struct listen_port_info *port_info = NULL;
334 int i = 0, found_portinfo = 0, found_lep = 0;
335 uint16_t port;
336
337 /*
338 * STEP 1: Figure out 'ifp' of the physical interface, not pseudo
339 * interfaces like vlan, lagg, etc..
340 * TBD: lagg support, lagg + vlan support.
341 */
342 ifp = TOEPCB(so)->l2te->ifp;
343 if (if_gettype(ifp) == IFT_L2VLAN) {
344 hw_ifp = VLAN_TRUNKDEV(ifp);
345 if (hw_ifp == NULL) {
346 CTR4(KTR_IW_CXGBE, "%s: Failed to get parent ifnet of "
347 "vlan ifnet %p, sock %p, master_lep %p",
348 __func__, ifp, so, master_lep);
349 return (NULL);
350 }
351 } else
352 hw_ifp = ifp;
353
354 /* STEP 2: Find 'port_info' with listener local port address. */
355 port = (master_lep->com.local_addr.ss_family == AF_INET) ?
356 ((struct sockaddr_in *)&master_lep->com.local_addr)->sin_port :
357 ((struct sockaddr_in6 *)&master_lep->com.local_addr)->sin6_port;
358
359
360 mutex_lock(&listen_port_mutex);
361 list_for_each_entry(port_info, &listen_port_list, list)
362 if (port_info->port_num == port) {
363 found_portinfo =1;
364 break;
365 }
366 if (!found_portinfo)
367 goto out;
368
369 /* STEP 3: Traverse through list of lep's that are bound to the current
370 * TCP port address and find the lep that belongs to the ifnet on which
371 * the SYN frame was received.
372 */
373 list_for_each_entry(lep, &port_info->lep_list, listen_ep_list) {
374 adap = lep->com.dev->rdev.adap;
375 for_each_port(adap, i) {
376 if (hw_ifp == adap->port[i]->vi[0].ifp) {
377 found_lep =1;
378 goto out;
379 }
380 }
381 }
382 out:
383 mutex_unlock(&listen_port_mutex);
384 return found_lep ? lep : (NULL);
385 }
386
process_timeout(struct c4iw_ep * ep)387 static void process_timeout(struct c4iw_ep *ep)
388 {
389 struct c4iw_qp_attributes attrs = {0};
390 int abort = 1;
391
392 CTR4(KTR_IW_CXGBE, "%s ep :%p, tid:%u, state %d", __func__,
393 ep, ep->hwtid, ep->com.state);
394 set_bit(TIMEDOUT, &ep->com.history);
395 switch (ep->com.state) {
396 case MPA_REQ_SENT:
397 connect_reply_upcall(ep, -ETIMEDOUT);
398 break;
399 case MPA_REQ_WAIT:
400 case MPA_REQ_RCVD:
401 case MPA_REP_SENT:
402 case FPDU_MODE:
403 break;
404 case CLOSING:
405 case MORIBUND:
406 if (ep->com.cm_id && ep->com.qp) {
407 attrs.next_state = C4IW_QP_STATE_ERROR;
408 c4iw_modify_qp(ep->com.dev, ep->com.qp,
409 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
410 }
411 close_complete_upcall(ep, -ETIMEDOUT);
412 break;
413 case ABORTING:
414 case DEAD:
415 /*
416 * These states are expected if the ep timed out at the same
417 * time as another thread was calling stop_ep_timer().
418 * So we silently do nothing for these states.
419 */
420 abort = 0;
421 break;
422 default:
423 CTR4(KTR_IW_CXGBE, "%s unexpected state ep %p tid %u state %u"
424 , __func__, ep, ep->hwtid, ep->com.state);
425 abort = 0;
426 }
427 if (abort)
428 c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
429 c4iw_put_ep(&ep->com);
430 return;
431 }
432
433 struct cqe_list_entry {
434 struct list_head entry;
435 struct c4iw_dev *rhp;
436 struct t4_cqe err_cqe;
437 };
438
439 static void
process_err_cqes(void)440 process_err_cqes(void)
441 {
442 unsigned long flag;
443 struct cqe_list_entry *cle;
444
445 spin_lock_irqsave(&err_cqe_lock, flag);
446 while (!list_empty(&err_cqe_list)) {
447 struct list_head *tmp;
448 tmp = err_cqe_list.next;
449 list_del(tmp);
450 tmp->next = tmp->prev = NULL;
451 spin_unlock_irqrestore(&err_cqe_lock, flag);
452 cle = list_entry(tmp, struct cqe_list_entry, entry);
453 c4iw_ev_dispatch(cle->rhp, &cle->err_cqe);
454 free(cle, M_CXGBE);
455 spin_lock_irqsave(&err_cqe_lock, flag);
456 }
457 spin_unlock_irqrestore(&err_cqe_lock, flag);
458
459 return;
460 }
461
462 static void
process_req(struct work_struct * ctx)463 process_req(struct work_struct *ctx)
464 {
465 struct c4iw_ep_common *epc;
466 unsigned long flag;
467 int ep_events;
468
469 process_err_cqes();
470 spin_lock_irqsave(&req_lock, flag);
471 while (!TAILQ_EMPTY(&req_list)) {
472 epc = TAILQ_FIRST(&req_list);
473 TAILQ_REMOVE(&req_list, epc, entry);
474 epc->entry.tqe_prev = NULL;
475 ep_events = epc->ep_events;
476 epc->ep_events = 0;
477 spin_unlock_irqrestore(&req_lock, flag);
478 mutex_lock(&epc->mutex);
479 CTR5(KTR_IW_CXGBE, "%s: so %p, ep %p, ep_state %s events 0x%x",
480 __func__, epc->so, epc, states[epc->state], ep_events);
481 if (ep_events & C4IW_EVENT_TERM)
482 process_terminate((struct c4iw_ep *)epc);
483 if (ep_events & C4IW_EVENT_TIMEOUT)
484 process_timeout((struct c4iw_ep *)epc);
485 if (ep_events & C4IW_EVENT_SOCKET)
486 process_socket_event((struct c4iw_ep *)epc);
487 mutex_unlock(&epc->mutex);
488 c4iw_put_ep(epc);
489 process_err_cqes();
490 spin_lock_irqsave(&req_lock, flag);
491 }
492 spin_unlock_irqrestore(&req_lock, flag);
493 }
494
495 /*
496 * XXX: doesn't belong here in the iWARP driver.
497 * XXX: assumes that the connection was offloaded by cxgbe/t4_tom if TF_TOE is
498 * set. Is this a valid assumption for active open?
499 */
500 static int
set_tcpinfo(struct c4iw_ep * ep)501 set_tcpinfo(struct c4iw_ep *ep)
502 {
503 struct socket *so = ep->com.so;
504 struct inpcb *inp = sotoinpcb(so);
505 struct tcpcb *tp;
506 struct toepcb *toep;
507 int rc = 0;
508
509 INP_WLOCK(inp);
510 tp = intotcpcb(inp);
511 if ((tp->t_flags & TF_TOE) == 0) {
512 rc = EINVAL;
513 log(LOG_ERR, "%s: connection not offloaded (so %p, ep %p)\n",
514 __func__, so, ep);
515 goto done;
516 }
517 toep = TOEPCB(so);
518
519 ep->hwtid = toep->tid;
520 ep->snd_seq = tp->snd_nxt;
521 ep->rcv_seq = tp->rcv_nxt;
522 done:
523 INP_WUNLOCK(inp);
524 return (rc);
525
526 }
527 static int
get_ifnet_from_raddr(struct sockaddr_storage * raddr,if_t * ifp)528 get_ifnet_from_raddr(struct sockaddr_storage *raddr, if_t *ifp)
529 {
530 int err = 0;
531 struct nhop_object *nh;
532
533 if (raddr->ss_family == AF_INET) {
534 struct sockaddr_in *raddr4 = (struct sockaddr_in *)raddr;
535
536 nh = fib4_lookup(RT_DEFAULT_FIB, raddr4->sin_addr, 0,
537 NHR_NONE, 0);
538 } else {
539 struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)raddr;
540 struct in6_addr addr6;
541 uint32_t scopeid;
542
543 memset(&addr6, 0, sizeof(addr6));
544 in6_splitscope((struct in6_addr *)&raddr6->sin6_addr,
545 &addr6, &scopeid);
546 nh = fib6_lookup(RT_DEFAULT_FIB, &addr6, scopeid,
547 NHR_NONE, 0);
548 }
549
550 if (nh == NULL)
551 err = EHOSTUNREACH;
552 else
553 *ifp = nh->nh_ifp;
554 CTR2(KTR_IW_CXGBE, "%s: return: %d", __func__, err);
555 return err;
556 }
557
558 static void
close_socket(struct socket * so)559 close_socket(struct socket *so)
560 {
561 uninit_iwarp_socket(so);
562 soclose(so);
563 }
564
565 static void
process_peer_close(struct c4iw_ep * ep)566 process_peer_close(struct c4iw_ep *ep)
567 {
568 struct c4iw_qp_attributes attrs = {0};
569 int disconnect = 1;
570 int release = 0;
571
572 CTR4(KTR_IW_CXGBE, "%s:ppcB ep %p so %p state %s", __func__, ep,
573 ep->com.so, states[ep->com.state]);
574
575 switch (ep->com.state) {
576
577 case MPA_REQ_WAIT:
578 CTR2(KTR_IW_CXGBE, "%s:ppc1 %p MPA_REQ_WAIT DEAD",
579 __func__, ep);
580 /* Fallthrough */
581 case MPA_REQ_SENT:
582 CTR2(KTR_IW_CXGBE, "%s:ppc2 %p MPA_REQ_SENT DEAD",
583 __func__, ep);
584 ep->com.state = DEAD;
585 connect_reply_upcall(ep, -ECONNABORTED);
586
587 disconnect = 0;
588 STOP_EP_TIMER(ep);
589 close_socket(ep->com.so);
590 deref_cm_id(&ep->com);
591 release = 1;
592 break;
593
594 case MPA_REQ_RCVD:
595
596 /*
597 * We're gonna mark this puppy DEAD, but keep
598 * the reference on it until the ULP accepts or
599 * rejects the CR.
600 */
601 CTR2(KTR_IW_CXGBE, "%s:ppc3 %p MPA_REQ_RCVD CLOSING",
602 __func__, ep);
603 ep->com.state = CLOSING;
604 break;
605
606 case MPA_REP_SENT:
607 CTR2(KTR_IW_CXGBE, "%s:ppc4 %p MPA_REP_SENT CLOSING",
608 __func__, ep);
609 ep->com.state = CLOSING;
610 break;
611
612 case FPDU_MODE:
613 CTR2(KTR_IW_CXGBE, "%s:ppc5 %p FPDU_MODE CLOSING",
614 __func__, ep);
615 START_EP_TIMER(ep);
616 ep->com.state = CLOSING;
617 attrs.next_state = C4IW_QP_STATE_CLOSING;
618 c4iw_modify_qp(ep->com.dev, ep->com.qp,
619 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
620 peer_close_upcall(ep);
621 break;
622
623 case ABORTING:
624 CTR2(KTR_IW_CXGBE, "%s:ppc6 %p ABORTING (disconn)",
625 __func__, ep);
626 disconnect = 0;
627 break;
628
629 case CLOSING:
630 CTR2(KTR_IW_CXGBE, "%s:ppc7 %p CLOSING MORIBUND",
631 __func__, ep);
632 ep->com.state = MORIBUND;
633 disconnect = 0;
634 break;
635
636 case MORIBUND:
637 CTR2(KTR_IW_CXGBE, "%s:ppc8 %p MORIBUND DEAD", __func__,
638 ep);
639 STOP_EP_TIMER(ep);
640 if (ep->com.cm_id && ep->com.qp) {
641 attrs.next_state = C4IW_QP_STATE_IDLE;
642 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
643 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
644 }
645 close_socket(ep->com.so);
646 close_complete_upcall(ep, 0);
647 ep->com.state = DEAD;
648 release = 1;
649 disconnect = 0;
650 break;
651
652 case DEAD:
653 CTR2(KTR_IW_CXGBE, "%s:ppc9 %p DEAD (disconn)",
654 __func__, ep);
655 disconnect = 0;
656 break;
657
658 default:
659 panic("%s: ep %p state %d", __func__, ep,
660 ep->com.state);
661 break;
662 }
663
664
665 if (disconnect) {
666
667 CTR2(KTR_IW_CXGBE, "%s:ppca %p", __func__, ep);
668 c4iw_ep_disconnect(ep, 0, M_NOWAIT);
669 }
670 if (release) {
671
672 CTR2(KTR_IW_CXGBE, "%s:ppcb %p", __func__, ep);
673 c4iw_put_ep(&ep->com);
674 }
675 CTR2(KTR_IW_CXGBE, "%s:ppcE %p", __func__, ep);
676 return;
677 }
678
679 static void
process_conn_error(struct c4iw_ep * ep)680 process_conn_error(struct c4iw_ep *ep)
681 {
682 struct c4iw_qp_attributes attrs = {0};
683 int ret;
684 int state;
685
686 state = ep->com.state;
687 CTR5(KTR_IW_CXGBE, "%s:pceB ep %p so %p so->so_error %u state %s",
688 __func__, ep, ep->com.so, ep->com.so->so_error,
689 states[ep->com.state]);
690
691 switch (state) {
692
693 case MPA_REQ_WAIT:
694 STOP_EP_TIMER(ep);
695 c4iw_put_ep(&ep->parent_ep->com);
696 break;
697
698 case MPA_REQ_SENT:
699 STOP_EP_TIMER(ep);
700 connect_reply_upcall(ep, -ECONNRESET);
701 break;
702
703 case MPA_REP_SENT:
704 ep->com.rpl_err = ECONNRESET;
705 CTR1(KTR_IW_CXGBE, "waking up ep %p", ep);
706 break;
707
708 case MPA_REQ_RCVD:
709 break;
710
711 case MORIBUND:
712 case CLOSING:
713 STOP_EP_TIMER(ep);
714 /*FALLTHROUGH*/
715 case FPDU_MODE:
716
717 if (ep->com.cm_id && ep->com.qp) {
718
719 attrs.next_state = C4IW_QP_STATE_ERROR;
720 ret = c4iw_modify_qp(ep->com.qp->rhp,
721 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
722 &attrs, 1);
723 if (ret)
724 log(LOG_ERR,
725 "%s - qp <- error failed!\n",
726 __func__);
727 }
728 peer_abort_upcall(ep);
729 break;
730
731 case ABORTING:
732 break;
733
734 case DEAD:
735 CTR2(KTR_IW_CXGBE, "%s so_error %d IN DEAD STATE!!!!",
736 __func__, ep->com.so->so_error);
737 return;
738
739 default:
740 panic("%s: ep %p state %d", __func__, ep, state);
741 break;
742 }
743
744 if (state != ABORTING) {
745 close_socket(ep->com.so);
746 ep->com.state = DEAD;
747 c4iw_put_ep(&ep->com);
748 }
749 CTR2(KTR_IW_CXGBE, "%s:pceE %p", __func__, ep);
750 return;
751 }
752
753 static void
process_close_complete(struct c4iw_ep * ep)754 process_close_complete(struct c4iw_ep *ep)
755 {
756 struct c4iw_qp_attributes attrs = {0};
757 int release = 0;
758
759 CTR4(KTR_IW_CXGBE, "%s:pccB ep %p so %p state %s", __func__, ep,
760 ep->com.so, states[ep->com.state]);
761
762 /* The cm_id may be null if we failed to connect */
763 set_bit(CLOSE_CON_RPL, &ep->com.history);
764
765 switch (ep->com.state) {
766
767 case CLOSING:
768 CTR2(KTR_IW_CXGBE, "%s:pcc1 %p CLOSING MORIBUND",
769 __func__, ep);
770 ep->com.state = MORIBUND;
771 break;
772
773 case MORIBUND:
774 CTR2(KTR_IW_CXGBE, "%s:pcc1 %p MORIBUND DEAD", __func__,
775 ep);
776 STOP_EP_TIMER(ep);
777
778 if ((ep->com.cm_id) && (ep->com.qp)) {
779
780 CTR2(KTR_IW_CXGBE, "%s:pcc2 %p QP_STATE_IDLE",
781 __func__, ep);
782 attrs.next_state = C4IW_QP_STATE_IDLE;
783 c4iw_modify_qp(ep->com.dev,
784 ep->com.qp,
785 C4IW_QP_ATTR_NEXT_STATE,
786 &attrs, 1);
787 }
788
789 close_socket(ep->com.so);
790 close_complete_upcall(ep, 0);
791 ep->com.state = DEAD;
792 release = 1;
793 break;
794
795 case ABORTING:
796 CTR2(KTR_IW_CXGBE, "%s:pcc5 %p ABORTING", __func__, ep);
797 break;
798
799 case DEAD:
800 CTR2(KTR_IW_CXGBE, "%s:pcc6 %p DEAD", __func__, ep);
801 break;
802 default:
803 CTR2(KTR_IW_CXGBE, "%s:pcc7 %p unknown ep state",
804 __func__, ep);
805 panic("%s:pcc6 %p unknown ep state", __func__, ep);
806 break;
807 }
808
809 if (release) {
810
811 CTR2(KTR_IW_CXGBE, "%s:pcc8 %p", __func__, ep);
812 release_ep_resources(ep);
813 }
814 CTR2(KTR_IW_CXGBE, "%s:pccE %p", __func__, ep);
815 return;
816 }
817
818 static void
setiwsockopt(struct socket * so)819 setiwsockopt(struct socket *so)
820 {
821 int rc;
822 struct sockopt sopt;
823 int on = 1;
824
825 sopt.sopt_dir = SOPT_SET;
826 sopt.sopt_level = IPPROTO_TCP;
827 sopt.sopt_name = TCP_NODELAY;
828 sopt.sopt_val = (caddr_t)&on;
829 sopt.sopt_valsize = sizeof on;
830 sopt.sopt_td = NULL;
831 rc = -sosetopt(so, &sopt);
832 if (rc) {
833 log(LOG_ERR, "%s: can't set TCP_NODELAY on so %p (%d)\n",
834 __func__, so, rc);
835 }
836 }
837
838 static void
init_iwarp_socket(struct socket * so,void * arg)839 init_iwarp_socket(struct socket *so, void *arg)
840 {
841 if (SOLISTENING(so)) {
842 SOLISTEN_LOCK(so);
843 solisten_upcall_set(so, c4iw_so_upcall, arg);
844 so->so_state |= SS_NBIO;
845 SOLISTEN_UNLOCK(so);
846 } else {
847 SOCKBUF_LOCK(&so->so_rcv);
848 soupcall_set(so, SO_RCV, c4iw_so_upcall, arg);
849 so->so_state |= SS_NBIO;
850 SOCKBUF_UNLOCK(&so->so_rcv);
851 }
852 }
853
854 static void
uninit_iwarp_socket(struct socket * so)855 uninit_iwarp_socket(struct socket *so)
856 {
857 if (SOLISTENING(so)) {
858 SOLISTEN_LOCK(so);
859 solisten_upcall_set(so, NULL, NULL);
860 SOLISTEN_UNLOCK(so);
861 } else {
862 SOCKBUF_LOCK(&so->so_rcv);
863 soupcall_clear(so, SO_RCV);
864 SOCKBUF_UNLOCK(&so->so_rcv);
865 }
866 }
867
868 static void
process_data(struct c4iw_ep * ep)869 process_data(struct c4iw_ep *ep)
870 {
871 int ret = 0;
872 int disconnect = 0;
873 struct c4iw_qp_attributes attrs = {0};
874
875 CTR5(KTR_IW_CXGBE, "%s: so %p, ep %p, state %s, sbused %d", __func__,
876 ep->com.so, ep, states[ep->com.state], sbused(&ep->com.so->so_rcv));
877
878 switch (ep->com.state) {
879 case MPA_REQ_SENT:
880 disconnect = process_mpa_reply(ep);
881 break;
882 case MPA_REQ_WAIT:
883 disconnect = process_mpa_request(ep);
884 if (disconnect)
885 /* Refered in process_newconn() */
886 c4iw_put_ep(&ep->parent_ep->com);
887 break;
888 case FPDU_MODE:
889 MPASS(ep->com.qp != NULL);
890 attrs.next_state = C4IW_QP_STATE_TERMINATE;
891 ret = c4iw_modify_qp(ep->com.dev, ep->com.qp,
892 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
893 if (ret != -EINPROGRESS)
894 disconnect = 1;
895 break;
896 default:
897 log(LOG_ERR, "%s: Unexpected streaming data. ep %p, "
898 "state %d, so %p, so_state 0x%x, sbused %u\n",
899 __func__, ep, ep->com.state, ep->com.so,
900 ep->com.so->so_state, sbused(&ep->com.so->so_rcv));
901 break;
902 }
903 if (disconnect)
904 c4iw_ep_disconnect(ep, disconnect == 2, GFP_KERNEL);
905
906 }
907
908 static void
process_connected(struct c4iw_ep * ep)909 process_connected(struct c4iw_ep *ep)
910 {
911 struct socket *so = ep->com.so;
912
913 if ((so->so_state & SS_ISCONNECTED) && !so->so_error) {
914 if (send_mpa_req(ep))
915 goto err;
916 } else {
917 connect_reply_upcall(ep, -so->so_error);
918 goto err;
919 }
920 return;
921 err:
922 close_socket(so);
923 ep->com.state = DEAD;
924 c4iw_put_ep(&ep->com);
925 return;
926 }
927
c4iw_zero_addr(struct sockaddr * addr)928 static inline bool c4iw_zero_addr(struct sockaddr *addr)
929 {
930 struct in6_addr *ip6;
931
932 if (addr->sa_family == AF_INET)
933 return (((struct sockaddr_in *)addr)->sin_addr.s_addr == 0);
934 else {
935 ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr;
936 return (ip6->s6_addr32[0] | ip6->s6_addr32[1] |
937 ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0;
938 }
939 }
940
941 #define _IN_LOOPBACK(i) (((in_addr_t)(i) & 0xff000000) == 0x7f000000)
c4iw_loopback_addr(struct sockaddr * addr,struct vnet * vnet)942 static inline bool c4iw_loopback_addr(struct sockaddr *addr, struct vnet *vnet)
943 {
944 bool ret;
945
946 if (addr->sa_family == AF_INET) {
947 if (vnet == NULL)
948 ret = _IN_LOOPBACK(ntohl(((struct sockaddr_in *) addr)->sin_addr.s_addr));
949 else {
950 CURVNET_SET_QUIET(vnet);
951 ret = IN_LOOPBACK(ntohl(((struct sockaddr_in *) addr)->sin_addr.s_addr));
952 CURVNET_RESTORE();
953 }
954 } else {
955 ret = IN6_IS_ADDR_LOOPBACK(&((struct sockaddr_in6 *) addr)->sin6_addr);
956 }
957 return (ret);
958 }
959 #undef _IN_LOOPBACK
960
c4iw_any_addr(struct sockaddr * addr,struct vnet * vnet)961 static inline bool c4iw_any_addr(struct sockaddr *addr, struct vnet *vnet)
962 {
963 return c4iw_zero_addr(addr) || c4iw_loopback_addr(addr, vnet);
964 }
965
966 static void
process_newconn(struct c4iw_listen_ep * master_lep,struct socket * new_so)967 process_newconn(struct c4iw_listen_ep *master_lep, struct socket *new_so)
968 {
969 struct c4iw_listen_ep *real_lep = NULL;
970 struct c4iw_ep *new_ep = NULL;
971 struct sockaddr_storage remote = { .ss_len = sizeof(remote) };
972 int ret = 0;
973
974 MPASS(new_so != NULL);
975
976 if (c4iw_any_addr((struct sockaddr *)&master_lep->com.local_addr,
977 new_so->so_vnet)) {
978 /* Here we need to find the 'real_lep' that belongs to the
979 * incomming socket's network interface, such that the newly
980 * created 'ep' can be attached to the real 'lep'.
981 */
982 real_lep = find_real_listen_ep(master_lep, new_so);
983 if (real_lep == NULL) {
984 CTR2(KTR_IW_CXGBE, "%s: Could not find the real listen "
985 "ep for sock: %p", __func__, new_so);
986 log(LOG_ERR,"%s: Could not find the real listen ep for "
987 "sock: %p\n", __func__, new_so);
988 /* FIXME: properly free the 'new_so' in failure case.
989 * Use of soabort() and soclose() are not legal
990 * here(before soaccept()).
991 */
992 return;
993 }
994 } else /* for Non-Wildcard address, master_lep is always the real_lep */
995 real_lep = master_lep;
996
997 new_ep = alloc_ep(sizeof(*new_ep), GFP_KERNEL);
998
999 CTR6(KTR_IW_CXGBE, "%s: master_lep %p, real_lep: %p, new ep %p, "
1000 "listening so %p, new so %p", __func__, master_lep, real_lep,
1001 new_ep, master_lep->com.so, new_so);
1002
1003 new_ep->com.dev = real_lep->com.dev;
1004 new_ep->com.so = new_so;
1005 new_ep->com.cm_id = NULL;
1006 new_ep->com.thread = real_lep->com.thread;
1007 new_ep->parent_ep = real_lep;
1008
1009 GET_LOCAL_ADDR(&new_ep->com.local_addr, new_so);
1010 GET_REMOTE_ADDR(&new_ep->com.remote_addr, new_so);
1011 c4iw_get_ep(&real_lep->com);
1012 timer_setup(&new_ep->timer, ep_timeout, 0);
1013 new_ep->com.state = MPA_REQ_WAIT;
1014
1015 setiwsockopt(new_so);
1016 ret = soaccept(new_so, (struct sockaddr *)&remote);
1017 if (ret != 0) {
1018 CTR4(KTR_IW_CXGBE,
1019 "%s:listen sock:%p, new sock:%p, ret:%d",
1020 __func__, master_lep->com.so, new_so, ret);
1021 soclose(new_so);
1022 c4iw_put_ep(&new_ep->com);
1023 c4iw_put_ep(&real_lep->com);
1024 return;
1025 }
1026
1027 START_EP_TIMER(new_ep);
1028
1029 /* MPA request might have been queued up on the socket already, so we
1030 * initialize the socket/upcall_handler under lock to prevent processing
1031 * MPA request on another thread(via process_req()) simultaneously.
1032 */
1033 c4iw_get_ep(&new_ep->com); /* Dereferenced at the end below, this is to
1034 avoid freeing of ep before ep unlock. */
1035 mutex_lock(&new_ep->com.mutex);
1036 init_iwarp_socket(new_so, &new_ep->com);
1037
1038 ret = process_mpa_request(new_ep);
1039 if (ret) {
1040 /* ABORT */
1041 c4iw_ep_disconnect(new_ep, 1, GFP_KERNEL);
1042 c4iw_put_ep(&real_lep->com);
1043 }
1044 mutex_unlock(&new_ep->com.mutex);
1045 c4iw_put_ep(&new_ep->com);
1046 return;
1047 }
1048
1049 static int
add_ep_to_req_list(struct c4iw_ep * ep,int new_ep_event)1050 add_ep_to_req_list(struct c4iw_ep *ep, int new_ep_event)
1051 {
1052 unsigned long flag;
1053
1054 spin_lock_irqsave(&req_lock, flag);
1055 if (ep && ep->com.so) {
1056 ep->com.ep_events |= new_ep_event;
1057 if (!ep->com.entry.tqe_prev) {
1058 c4iw_get_ep(&ep->com);
1059 TAILQ_INSERT_TAIL(&req_list, &ep->com, entry);
1060 queue_work(c4iw_taskq, &c4iw_task);
1061 }
1062 }
1063 spin_unlock_irqrestore(&req_lock, flag);
1064
1065 return (0);
1066 }
1067
1068 static int
c4iw_so_upcall(struct socket * so,void * arg,int waitflag)1069 c4iw_so_upcall(struct socket *so, void *arg, int waitflag)
1070 {
1071 struct c4iw_ep *ep = arg;
1072
1073 CTR6(KTR_IW_CXGBE,
1074 "%s: so %p, so_state 0x%x, ep %p, ep_state %s, tqe_prev %p",
1075 __func__, so, so->so_state, ep, states[ep->com.state],
1076 ep->com.entry.tqe_prev);
1077
1078 MPASS(ep->com.so == so);
1079 /*
1080 * Wake up any threads waiting in rdma_init()/rdma_fini(),
1081 * with locks held.
1082 */
1083 if (so->so_error || c4iw_stopped(&ep->com.dev->rdev))
1084 c4iw_wake_up_noref(ep->com.wr_waitp, -ECONNRESET);
1085 add_ep_to_req_list(ep, C4IW_EVENT_SOCKET);
1086
1087 return (SU_OK);
1088 }
1089
1090
1091 static int
terminate(struct sge_iq * iq,const struct rss_header * rss,struct mbuf * m)1092 terminate(struct sge_iq *iq, const struct rss_header *rss, struct mbuf *m)
1093 {
1094 struct adapter *sc = iq->adapter;
1095 const struct cpl_rdma_terminate *cpl = mtod(m, const void *);
1096 unsigned int tid = GET_TID(cpl);
1097 struct toepcb *toep = lookup_tid(sc, tid);
1098 struct socket *so;
1099 struct c4iw_ep *ep;
1100
1101 INP_WLOCK(toep->inp);
1102 so = inp_inpcbtosocket(toep->inp);
1103 ep = so->so_rcv.sb_upcallarg;
1104 INP_WUNLOCK(toep->inp);
1105
1106 CTR3(KTR_IW_CXGBE, "%s: so %p, ep %p", __func__, so, ep);
1107 add_ep_to_req_list(ep, C4IW_EVENT_TERM);
1108
1109 return 0;
1110 }
1111
1112 static void
process_socket_event(struct c4iw_ep * ep)1113 process_socket_event(struct c4iw_ep *ep)
1114 {
1115 int state = ep->com.state;
1116 struct socket *so = ep->com.so;
1117
1118 if (ep->com.state == DEAD) {
1119 CTR3(KTR_IW_CXGBE, "%s: Pending socket event discarded "
1120 "ep %p ep_state %s", __func__, ep, states[state]);
1121 return;
1122 }
1123
1124 CTR6(KTR_IW_CXGBE, "process_socket_event: so %p, so_state 0x%x, "
1125 "so_err %d, sb_state 0x%x, ep %p, ep_state %s", so, so->so_state,
1126 so->so_error, so->so_rcv.sb_state, ep, states[state]);
1127
1128 if (state == CONNECTING) {
1129 process_connected(ep);
1130 return;
1131 }
1132
1133 if (state == LISTEN) {
1134 struct c4iw_listen_ep *lep = (struct c4iw_listen_ep *)ep;
1135 struct socket *listen_so = so, *new_so = NULL;
1136 int error = 0;
1137
1138 SOLISTEN_LOCK(listen_so);
1139 do {
1140 error = solisten_dequeue(listen_so, &new_so,
1141 SOCK_NONBLOCK);
1142 if (error) {
1143 CTR4(KTR_IW_CXGBE, "%s: lep %p listen_so %p "
1144 "error %d", __func__, lep, listen_so,
1145 error);
1146 return;
1147 }
1148 process_newconn(lep, new_so);
1149
1150 /* solisten_dequeue() unlocks while return, so aquire
1151 * lock again for sol_qlen and also for next iteration.
1152 */
1153 SOLISTEN_LOCK(listen_so);
1154 } while (listen_so->sol_qlen);
1155 SOLISTEN_UNLOCK(listen_so);
1156
1157 return;
1158 }
1159
1160 /* connection error */
1161 if (so->so_error) {
1162 process_conn_error(ep);
1163 return;
1164 }
1165
1166 /* peer close */
1167 if ((so->so_rcv.sb_state & SBS_CANTRCVMORE) && state <= CLOSING) {
1168 process_peer_close(ep);
1169 /*
1170 * check whether socket disconnect event is pending before
1171 * returning. Fallthrough if yes.
1172 */
1173 if (!(so->so_state & SS_ISDISCONNECTED))
1174 return;
1175 }
1176
1177 /* close complete */
1178 if (so->so_state & SS_ISDISCONNECTED) {
1179 process_close_complete(ep);
1180 return;
1181 }
1182
1183 /* rx data */
1184 if (sbused(&ep->com.so->so_rcv)) {
1185 process_data(ep);
1186 return;
1187 }
1188
1189 /* Socket events for 'MPA Request Received' and 'Close Complete'
1190 * were already processed earlier in their previous events handlers.
1191 * Hence, these socket events are skipped.
1192 * And any other socket events must have handled above.
1193 */
1194 MPASS((ep->com.state == MPA_REQ_RCVD) || (ep->com.state == MORIBUND));
1195
1196 if ((ep->com.state != MPA_REQ_RCVD) && (ep->com.state != MORIBUND))
1197 log(LOG_ERR, "%s: Unprocessed socket event so %p, "
1198 "so_state 0x%x, so_err %d, sb_state 0x%x, ep %p, ep_state %s\n",
1199 __func__, so, so->so_state, so->so_error, so->so_rcv.sb_state,
1200 ep, states[state]);
1201
1202 }
1203
1204 SYSCTL_NODE(_hw, OID_AUTO, iw_cxgbe, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
1205 "iw_cxgbe driver parameters");
1206
1207 static int dack_mode = 0;
1208 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, dack_mode, CTLFLAG_RWTUN, &dack_mode, 0,
1209 "Delayed ack mode (default = 0)");
1210
1211 int c4iw_max_read_depth = 8;
1212 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, c4iw_max_read_depth, CTLFLAG_RWTUN, &c4iw_max_read_depth, 0,
1213 "Per-connection max ORD/IRD (default = 8)");
1214
1215 static int enable_tcp_timestamps;
1216 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, enable_tcp_timestamps, CTLFLAG_RWTUN, &enable_tcp_timestamps, 0,
1217 "Enable tcp timestamps (default = 0)");
1218
1219 static int enable_tcp_sack;
1220 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, enable_tcp_sack, CTLFLAG_RWTUN, &enable_tcp_sack, 0,
1221 "Enable tcp SACK (default = 0)");
1222
1223 static int enable_tcp_window_scaling = 1;
1224 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, enable_tcp_window_scaling, CTLFLAG_RWTUN, &enable_tcp_window_scaling, 0,
1225 "Enable tcp window scaling (default = 1)");
1226
1227 int c4iw_debug = 0;
1228 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, c4iw_debug, CTLFLAG_RWTUN, &c4iw_debug, 0,
1229 "Enable debug logging (default = 0)");
1230
1231 static int peer2peer = 1;
1232 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, peer2peer, CTLFLAG_RWTUN, &peer2peer, 0,
1233 "Support peer2peer ULPs (default = 1)");
1234
1235 static int p2p_type = FW_RI_INIT_P2PTYPE_READ_REQ;
1236 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, p2p_type, CTLFLAG_RWTUN, &p2p_type, 0,
1237 "RDMAP opcode to use for the RTR message: 1 = RDMA_READ 0 = RDMA_WRITE (default 1)");
1238
1239 static int ep_timeout_secs = 60;
1240 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, ep_timeout_secs, CTLFLAG_RWTUN, &ep_timeout_secs, 0,
1241 "CM Endpoint operation timeout in seconds (default = 60)");
1242
1243 static int mpa_rev = 1;
1244 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, mpa_rev, CTLFLAG_RWTUN, &mpa_rev, 0,
1245 "MPA Revision, 0 supports amso1100, 1 is RFC5044 spec compliant, 2 is IETF MPA Peer Connect Draft compliant (default = 1)");
1246
1247 static int markers_enabled;
1248 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, markers_enabled, CTLFLAG_RWTUN, &markers_enabled, 0,
1249 "Enable MPA MARKERS (default(0) = disabled)");
1250
1251 static int crc_enabled = 1;
1252 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, crc_enabled, CTLFLAG_RWTUN, &crc_enabled, 0,
1253 "Enable MPA CRC (default(1) = enabled)");
1254
1255 static int rcv_win = 256 * 1024;
1256 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, rcv_win, CTLFLAG_RWTUN, &rcv_win, 0,
1257 "TCP receive window in bytes (default = 256KB)");
1258
1259 static int snd_win = 128 * 1024;
1260 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, snd_win, CTLFLAG_RWTUN, &snd_win, 0,
1261 "TCP send window in bytes (default = 128KB)");
1262
1263 int use_dsgl = 1;
1264 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, use_dsgl, CTLFLAG_RWTUN, &use_dsgl, 0,
1265 "Use DSGL for PBL/FastReg (default=1)");
1266
1267 int inline_threshold = 128;
1268 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, inline_threshold, CTLFLAG_RWTUN, &inline_threshold, 0,
1269 "inline vs dsgl threshold (default=128)");
1270
1271 static int reuseaddr = 0;
1272 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, reuseaddr, CTLFLAG_RWTUN, &reuseaddr, 0,
1273 "Enable SO_REUSEADDR & SO_REUSEPORT socket options on all iWARP client connections(default = 0)");
1274
1275 static void
start_ep_timer(struct c4iw_ep * ep)1276 start_ep_timer(struct c4iw_ep *ep)
1277 {
1278
1279 if (timer_pending(&ep->timer)) {
1280 CTR2(KTR_IW_CXGBE, "%s: ep %p, already started", __func__, ep);
1281 printk(KERN_ERR "%s timer already started! ep %p\n", __func__,
1282 ep);
1283 return;
1284 }
1285 clear_bit(TIMEOUT, &ep->com.flags);
1286 c4iw_get_ep(&ep->com);
1287 ep->timer.expires = jiffies + ep_timeout_secs * HZ;
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 epc->wr_waitp = c4iw_alloc_wr_wait(gfp);
1313 if (!epc->wr_waitp) {
1314 kfree(epc);
1315 return (NULL);
1316 }
1317 kref_init(&epc->kref);
1318 mutex_init(&epc->mutex);
1319 c4iw_init_wr_wait(epc->wr_waitp);
1320
1321 return (epc);
1322 }
1323
_c4iw_free_ep(struct kref * kref)1324 void _c4iw_free_ep(struct kref *kref)
1325 {
1326 struct c4iw_ep *ep;
1327 #if defined(KTR) || defined(INVARIANTS)
1328 struct c4iw_ep_common *epc;
1329 #endif
1330
1331 ep = container_of(kref, struct c4iw_ep, com.kref);
1332 #if defined(KTR) || defined(INVARIANTS)
1333 epc = &ep->com;
1334 #endif
1335 KASSERT(!epc->entry.tqe_prev, ("%s epc %p still on req list",
1336 __func__, epc));
1337 if (test_bit(QP_REFERENCED, &ep->com.flags))
1338 deref_qp(ep);
1339 CTR4(KTR_IW_CXGBE, "%s: ep %p, history 0x%lx, flags 0x%lx",
1340 __func__, ep, epc->history, epc->flags);
1341 c4iw_put_wr_wait(ep->com.wr_waitp);
1342 kfree(ep);
1343 }
1344
release_ep_resources(struct c4iw_ep * ep)1345 static void release_ep_resources(struct c4iw_ep *ep)
1346 {
1347 CTR2(KTR_IW_CXGBE, "%s:rerB %p", __func__, ep);
1348 set_bit(RELEASE_RESOURCES, &ep->com.flags);
1349 c4iw_put_ep(&ep->com);
1350 CTR2(KTR_IW_CXGBE, "%s:rerE %p", __func__, ep);
1351 }
1352
1353 static int
send_mpa_req(struct c4iw_ep * ep)1354 send_mpa_req(struct c4iw_ep *ep)
1355 {
1356 int mpalen;
1357 struct mpa_message *mpa;
1358 struct mpa_v2_conn_params mpa_v2_params;
1359 struct mbuf *m;
1360 char mpa_rev_to_use = mpa_rev;
1361 int err = 0;
1362
1363 if (ep->retry_with_mpa_v1)
1364 mpa_rev_to_use = 1;
1365 mpalen = sizeof(*mpa) + ep->plen;
1366 if (mpa_rev_to_use == 2)
1367 mpalen += sizeof(struct mpa_v2_conn_params);
1368
1369 mpa = malloc(mpalen, M_CXGBE, M_NOWAIT);
1370 if (mpa == NULL) {
1371 err = -ENOMEM;
1372 CTR3(KTR_IW_CXGBE, "%s:smr1 ep: %p , error: %d",
1373 __func__, ep, err);
1374 goto err;
1375 }
1376
1377 memset(mpa, 0, mpalen);
1378 memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
1379 mpa->flags = (crc_enabled ? MPA_CRC : 0) |
1380 (markers_enabled ? MPA_MARKERS : 0) |
1381 (mpa_rev_to_use == 2 ? MPA_ENHANCED_RDMA_CONN : 0);
1382 mpa->private_data_size = htons(ep->plen);
1383 mpa->revision = mpa_rev_to_use;
1384
1385 if (mpa_rev_to_use == 1) {
1386 ep->tried_with_mpa_v1 = 1;
1387 ep->retry_with_mpa_v1 = 0;
1388 }
1389
1390 if (mpa_rev_to_use == 2) {
1391 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
1392 sizeof(struct mpa_v2_conn_params));
1393 mpa_v2_params.ird = htons((u16)ep->ird);
1394 mpa_v2_params.ord = htons((u16)ep->ord);
1395
1396 if (peer2peer) {
1397 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
1398
1399 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE) {
1400 mpa_v2_params.ord |=
1401 htons(MPA_V2_RDMA_WRITE_RTR);
1402 } else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ) {
1403 mpa_v2_params.ord |=
1404 htons(MPA_V2_RDMA_READ_RTR);
1405 }
1406 }
1407 memcpy(mpa->private_data, &mpa_v2_params,
1408 sizeof(struct mpa_v2_conn_params));
1409
1410 if (ep->plen) {
1411
1412 memcpy(mpa->private_data +
1413 sizeof(struct mpa_v2_conn_params),
1414 ep->mpa_pkt + sizeof(*mpa), ep->plen);
1415 }
1416 } else {
1417
1418 if (ep->plen)
1419 memcpy(mpa->private_data,
1420 ep->mpa_pkt + sizeof(*mpa), ep->plen);
1421 CTR2(KTR_IW_CXGBE, "%s:smr7 %p", __func__, ep);
1422 }
1423
1424 m = m_getm(NULL, mpalen, M_NOWAIT, MT_DATA);
1425 if (m == NULL) {
1426 err = -ENOMEM;
1427 CTR3(KTR_IW_CXGBE, "%s:smr2 ep: %p , error: %d",
1428 __func__, ep, err);
1429 free(mpa, M_CXGBE);
1430 goto err;
1431 }
1432 m_copyback(m, 0, mpalen, (void *)mpa);
1433 free(mpa, M_CXGBE);
1434
1435 err = -sosend(ep->com.so, NULL, NULL, m, NULL, MSG_DONTWAIT,
1436 ep->com.thread);
1437 if (err) {
1438 CTR3(KTR_IW_CXGBE, "%s:smr3 ep: %p , error: %d",
1439 __func__, ep, err);
1440 goto err;
1441 }
1442
1443 START_EP_TIMER(ep);
1444 ep->com.state = MPA_REQ_SENT;
1445 ep->mpa_attr.initiator = 1;
1446 CTR3(KTR_IW_CXGBE, "%s:smrE %p, error: %d", __func__, ep, err);
1447 return 0;
1448 err:
1449 connect_reply_upcall(ep, err);
1450 CTR3(KTR_IW_CXGBE, "%s:smrE %p, error: %d", __func__, ep, err);
1451 return err;
1452 }
1453
send_mpa_reject(struct c4iw_ep * ep,const void * pdata,u8 plen)1454 static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen)
1455 {
1456 int mpalen ;
1457 struct mpa_message *mpa;
1458 struct mpa_v2_conn_params mpa_v2_params;
1459 struct mbuf *m;
1460 int err;
1461
1462 CTR4(KTR_IW_CXGBE, "%s:smrejB %p %u %d", __func__, ep, ep->hwtid,
1463 ep->plen);
1464
1465 mpalen = sizeof(*mpa) + plen;
1466
1467 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
1468
1469 mpalen += sizeof(struct mpa_v2_conn_params);
1470 CTR4(KTR_IW_CXGBE, "%s:smrej1 %p %u %d", __func__, ep,
1471 ep->mpa_attr.version, mpalen);
1472 }
1473
1474 mpa = malloc(mpalen, M_CXGBE, M_NOWAIT);
1475 if (mpa == NULL)
1476 return (-ENOMEM);
1477
1478 memset(mpa, 0, mpalen);
1479 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
1480 mpa->flags = MPA_REJECT;
1481 mpa->revision = mpa_rev;
1482 mpa->private_data_size = htons(plen);
1483
1484 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
1485
1486 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
1487 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
1488 sizeof(struct mpa_v2_conn_params));
1489 mpa_v2_params.ird = htons(((u16)ep->ird) |
1490 (peer2peer ? MPA_V2_PEER2PEER_MODEL :
1491 0));
1492 mpa_v2_params.ord = htons(((u16)ep->ord) | (peer2peer ?
1493 (p2p_type ==
1494 FW_RI_INIT_P2PTYPE_RDMA_WRITE ?
1495 MPA_V2_RDMA_WRITE_RTR : p2p_type ==
1496 FW_RI_INIT_P2PTYPE_READ_REQ ?
1497 MPA_V2_RDMA_READ_RTR : 0) : 0));
1498 memcpy(mpa->private_data, &mpa_v2_params,
1499 sizeof(struct mpa_v2_conn_params));
1500
1501 if (ep->plen)
1502 memcpy(mpa->private_data +
1503 sizeof(struct mpa_v2_conn_params), pdata, plen);
1504 CTR5(KTR_IW_CXGBE, "%s:smrej3 %p %d %d %d", __func__, ep,
1505 mpa_v2_params.ird, mpa_v2_params.ord, ep->plen);
1506 } else
1507 if (plen)
1508 memcpy(mpa->private_data, pdata, plen);
1509
1510 m = m_getm(NULL, mpalen, M_NOWAIT, MT_DATA);
1511 if (m == NULL) {
1512 free(mpa, M_CXGBE);
1513 return (-ENOMEM);
1514 }
1515 m_copyback(m, 0, mpalen, (void *)mpa);
1516 free(mpa, M_CXGBE);
1517
1518 err = -sosend(ep->com.so, NULL, NULL, m, NULL, MSG_DONTWAIT, ep->com.thread);
1519 if (!err)
1520 ep->snd_seq += mpalen;
1521 CTR4(KTR_IW_CXGBE, "%s:smrejE %p %u %d", __func__, ep, ep->hwtid, err);
1522 return err;
1523 }
1524
send_mpa_reply(struct c4iw_ep * ep,const void * pdata,u8 plen)1525 static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen)
1526 {
1527 int mpalen;
1528 struct mpa_message *mpa;
1529 struct mbuf *m;
1530 struct mpa_v2_conn_params mpa_v2_params;
1531 int err;
1532
1533 CTR2(KTR_IW_CXGBE, "%s:smrepB %p", __func__, ep);
1534
1535 mpalen = sizeof(*mpa) + plen;
1536
1537 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
1538
1539 CTR3(KTR_IW_CXGBE, "%s:smrep1 %p %d", __func__, ep,
1540 ep->mpa_attr.version);
1541 mpalen += sizeof(struct mpa_v2_conn_params);
1542 }
1543
1544 mpa = malloc(mpalen, M_CXGBE, M_NOWAIT);
1545 if (mpa == NULL)
1546 return (-ENOMEM);
1547
1548 memset(mpa, 0, sizeof(*mpa));
1549 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
1550 mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) |
1551 (markers_enabled ? MPA_MARKERS : 0);
1552 mpa->revision = ep->mpa_attr.version;
1553 mpa->private_data_size = htons(plen);
1554
1555 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
1556
1557 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
1558 mpa->private_data_size +=
1559 htons(sizeof(struct mpa_v2_conn_params));
1560 mpa_v2_params.ird = htons((u16)ep->ird);
1561 mpa_v2_params.ord = htons((u16)ep->ord);
1562 CTR5(KTR_IW_CXGBE, "%s:smrep3 %p %d %d %d", __func__, ep,
1563 ep->mpa_attr.version, mpa_v2_params.ird, mpa_v2_params.ord);
1564
1565 if (peer2peer && (ep->mpa_attr.p2p_type !=
1566 FW_RI_INIT_P2PTYPE_DISABLED)) {
1567
1568 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
1569
1570 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE) {
1571
1572 mpa_v2_params.ord |=
1573 htons(MPA_V2_RDMA_WRITE_RTR);
1574 CTR5(KTR_IW_CXGBE, "%s:smrep4 %p %d %d %d",
1575 __func__, ep, p2p_type, mpa_v2_params.ird,
1576 mpa_v2_params.ord);
1577 }
1578 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ) {
1579
1580 mpa_v2_params.ord |=
1581 htons(MPA_V2_RDMA_READ_RTR);
1582 CTR5(KTR_IW_CXGBE, "%s:smrep5 %p %d %d %d",
1583 __func__, ep, p2p_type, mpa_v2_params.ird,
1584 mpa_v2_params.ord);
1585 }
1586 }
1587
1588 memcpy(mpa->private_data, &mpa_v2_params,
1589 sizeof(struct mpa_v2_conn_params));
1590
1591 if (ep->plen)
1592 memcpy(mpa->private_data +
1593 sizeof(struct mpa_v2_conn_params), pdata, plen);
1594 } else
1595 if (plen)
1596 memcpy(mpa->private_data, pdata, plen);
1597
1598 m = m_getm(NULL, mpalen, M_NOWAIT, MT_DATA);
1599 if (m == NULL) {
1600 free(mpa, M_CXGBE);
1601 return (-ENOMEM);
1602 }
1603 m_copyback(m, 0, mpalen, (void *)mpa);
1604 free(mpa, M_CXGBE);
1605
1606
1607 ep->com.state = MPA_REP_SENT;
1608 ep->snd_seq += mpalen;
1609 err = -sosend(ep->com.so, NULL, NULL, m, NULL, MSG_DONTWAIT,
1610 ep->com.thread);
1611 CTR3(KTR_IW_CXGBE, "%s:smrepE %p %d", __func__, ep, err);
1612 return err;
1613 }
1614
1615
1616
close_complete_upcall(struct c4iw_ep * ep,int status)1617 static void close_complete_upcall(struct c4iw_ep *ep, int status)
1618 {
1619 struct iw_cm_event event;
1620
1621 CTR2(KTR_IW_CXGBE, "%s:ccuB %p", __func__, ep);
1622 memset(&event, 0, sizeof(event));
1623 event.event = IW_CM_EVENT_CLOSE;
1624 event.status = status;
1625
1626 if (ep->com.cm_id) {
1627
1628 CTR2(KTR_IW_CXGBE, "%s:ccu1 %1", __func__, ep);
1629 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1630 deref_cm_id(&ep->com);
1631 set_bit(CLOSE_UPCALL, &ep->com.history);
1632 }
1633 CTR2(KTR_IW_CXGBE, "%s:ccuE %p", __func__, ep);
1634 }
1635
1636 static int
send_abort(struct c4iw_ep * ep)1637 send_abort(struct c4iw_ep *ep)
1638 {
1639 struct socket *so = ep->com.so;
1640 struct sockopt sopt;
1641 int rc;
1642 struct linger l;
1643
1644 CTR5(KTR_IW_CXGBE, "%s ep %p so %p state %s tid %d", __func__, ep, so,
1645 states[ep->com.state], ep->hwtid);
1646
1647 l.l_onoff = 1;
1648 l.l_linger = 0;
1649
1650 /* linger_time of 0 forces RST to be sent */
1651 sopt.sopt_dir = SOPT_SET;
1652 sopt.sopt_level = SOL_SOCKET;
1653 sopt.sopt_name = SO_LINGER;
1654 sopt.sopt_val = (caddr_t)&l;
1655 sopt.sopt_valsize = sizeof l;
1656 sopt.sopt_td = NULL;
1657 rc = -sosetopt(so, &sopt);
1658 if (rc != 0) {
1659 log(LOG_ERR, "%s: sosetopt(%p, linger = 0) failed with %d.\n",
1660 __func__, so, rc);
1661 }
1662
1663 uninit_iwarp_socket(so);
1664 soclose(so);
1665 set_bit(ABORT_CONN, &ep->com.history);
1666
1667 /*
1668 * TBD: iw_cxgbe driver should receive ABORT reply for every ABORT
1669 * request it has sent. But the current TOE driver is not propagating
1670 * this ABORT reply event (via do_abort_rpl) to iw_cxgbe. So as a work-
1671 * around de-refererece 'ep' here instead of doing it in abort_rpl()
1672 * handler(not yet implemented) of iw_cxgbe driver.
1673 */
1674 release_ep_resources(ep);
1675 ep->com.state = DEAD;
1676
1677 return (0);
1678 }
1679
peer_close_upcall(struct c4iw_ep * ep)1680 static void peer_close_upcall(struct c4iw_ep *ep)
1681 {
1682 struct iw_cm_event event;
1683
1684 CTR2(KTR_IW_CXGBE, "%s:pcuB %p", __func__, ep);
1685 memset(&event, 0, sizeof(event));
1686 event.event = IW_CM_EVENT_DISCONNECT;
1687
1688 if (ep->com.cm_id) {
1689
1690 CTR2(KTR_IW_CXGBE, "%s:pcu1 %p", __func__, ep);
1691 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1692 set_bit(DISCONN_UPCALL, &ep->com.history);
1693 }
1694 CTR2(KTR_IW_CXGBE, "%s:pcuE %p", __func__, ep);
1695 }
1696
peer_abort_upcall(struct c4iw_ep * ep)1697 static void peer_abort_upcall(struct c4iw_ep *ep)
1698 {
1699 struct iw_cm_event event;
1700
1701 CTR2(KTR_IW_CXGBE, "%s:pauB %p", __func__, ep);
1702 memset(&event, 0, sizeof(event));
1703 event.event = IW_CM_EVENT_CLOSE;
1704 event.status = -ECONNRESET;
1705
1706 if (ep->com.cm_id) {
1707
1708 CTR2(KTR_IW_CXGBE, "%s:pau1 %p", __func__, ep);
1709 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1710 deref_cm_id(&ep->com);
1711 set_bit(ABORT_UPCALL, &ep->com.history);
1712 }
1713 CTR2(KTR_IW_CXGBE, "%s:pauE %p", __func__, ep);
1714 }
1715
connect_reply_upcall(struct c4iw_ep * ep,int status)1716 static void connect_reply_upcall(struct c4iw_ep *ep, int status)
1717 {
1718 struct iw_cm_event event;
1719
1720 CTR3(KTR_IW_CXGBE, "%s:cruB %p, status: %d", __func__, ep, status);
1721 memset(&event, 0, sizeof(event));
1722 event.event = IW_CM_EVENT_CONNECT_REPLY;
1723 event.status = ((status == -ECONNABORTED) || (status == -EPIPE)) ?
1724 -ECONNRESET : status;
1725 event.local_addr = ep->com.local_addr;
1726 event.remote_addr = ep->com.remote_addr;
1727
1728 if ((status == 0) || (status == -ECONNREFUSED)) {
1729
1730 if (!ep->tried_with_mpa_v1) {
1731
1732 CTR2(KTR_IW_CXGBE, "%s:cru1 %p", __func__, ep);
1733 /* this means MPA_v2 is used */
1734 event.ord = ep->ird;
1735 event.ird = ep->ord;
1736 event.private_data_len = ep->plen -
1737 sizeof(struct mpa_v2_conn_params);
1738 event.private_data = ep->mpa_pkt +
1739 sizeof(struct mpa_message) +
1740 sizeof(struct mpa_v2_conn_params);
1741 } else {
1742
1743 CTR2(KTR_IW_CXGBE, "%s:cru2 %p", __func__, ep);
1744 /* this means MPA_v1 is used */
1745 event.ord = c4iw_max_read_depth;
1746 event.ird = c4iw_max_read_depth;
1747 event.private_data_len = ep->plen;
1748 event.private_data = ep->mpa_pkt +
1749 sizeof(struct mpa_message);
1750 }
1751 }
1752
1753 if (ep->com.cm_id) {
1754
1755 CTR2(KTR_IW_CXGBE, "%s:cru3 %p", __func__, ep);
1756 set_bit(CONN_RPL_UPCALL, &ep->com.history);
1757 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1758 }
1759
1760 if(status == -ECONNABORTED) {
1761
1762 CTR3(KTR_IW_CXGBE, "%s:cruE %p %d", __func__, ep, status);
1763 return;
1764 }
1765
1766 if (status < 0) {
1767
1768 CTR3(KTR_IW_CXGBE, "%s:cru4 %p %d", __func__, ep, status);
1769 deref_cm_id(&ep->com);
1770 }
1771
1772 CTR2(KTR_IW_CXGBE, "%s:cruE %p", __func__, ep);
1773 }
1774
connect_request_upcall(struct c4iw_ep * ep)1775 static int connect_request_upcall(struct c4iw_ep *ep)
1776 {
1777 struct iw_cm_event event;
1778 int ret;
1779
1780 CTR3(KTR_IW_CXGBE, "%s: ep %p, mpa_v1 %d", __func__, ep,
1781 ep->tried_with_mpa_v1);
1782
1783 memset(&event, 0, sizeof(event));
1784 event.event = IW_CM_EVENT_CONNECT_REQUEST;
1785 event.local_addr = ep->com.local_addr;
1786 event.remote_addr = ep->com.remote_addr;
1787 event.provider_data = ep;
1788
1789 if (!ep->tried_with_mpa_v1) {
1790 /* this means MPA_v2 is used */
1791 event.ord = ep->ord;
1792 event.ird = ep->ird;
1793 event.private_data_len = ep->plen -
1794 sizeof(struct mpa_v2_conn_params);
1795 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message) +
1796 sizeof(struct mpa_v2_conn_params);
1797 } else {
1798
1799 /* this means MPA_v1 is used. Send max supported */
1800 event.ord = c4iw_max_read_depth;
1801 event.ird = c4iw_max_read_depth;
1802 event.private_data_len = ep->plen;
1803 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
1804 }
1805
1806 c4iw_get_ep(&ep->com);
1807 ret = ep->parent_ep->com.cm_id->event_handler(ep->parent_ep->com.cm_id,
1808 &event);
1809 if(ret) {
1810 CTR3(KTR_IW_CXGBE, "%s: ep %p, Failure while notifying event to"
1811 " IWCM, err:%d", __func__, ep, ret);
1812 c4iw_put_ep(&ep->com);
1813 } else
1814 /* Dereference parent_ep only in success case.
1815 * In case of failure, parent_ep is dereferenced by the caller
1816 * of process_mpa_request().
1817 */
1818 c4iw_put_ep(&ep->parent_ep->com);
1819
1820 set_bit(CONNREQ_UPCALL, &ep->com.history);
1821 return ret;
1822 }
1823
established_upcall(struct c4iw_ep * ep)1824 static void established_upcall(struct c4iw_ep *ep)
1825 {
1826 struct iw_cm_event event;
1827
1828 CTR2(KTR_IW_CXGBE, "%s:euB %p", __func__, ep);
1829 memset(&event, 0, sizeof(event));
1830 event.event = IW_CM_EVENT_ESTABLISHED;
1831 event.ird = ep->ord;
1832 event.ord = ep->ird;
1833
1834 if (ep->com.cm_id) {
1835
1836 CTR2(KTR_IW_CXGBE, "%s:eu1 %p", __func__, ep);
1837 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1838 set_bit(ESTAB_UPCALL, &ep->com.history);
1839 }
1840 CTR2(KTR_IW_CXGBE, "%s:euE %p", __func__, ep);
1841 }
1842
1843
1844 #define RELAXED_IRD_NEGOTIATION 1
1845
1846 /*
1847 * process_mpa_reply - process streaming mode MPA reply
1848 *
1849 * Returns:
1850 *
1851 * 0 upon success indicating a connect request was delivered to the ULP
1852 * or the mpa request is incomplete but valid so far.
1853 *
1854 * 1 if a failure requires the caller to close the connection.
1855 *
1856 * 2 if a failure requires the caller to abort the connection.
1857 */
process_mpa_reply(struct c4iw_ep * ep)1858 static int process_mpa_reply(struct c4iw_ep *ep)
1859 {
1860 struct mpa_message *mpa;
1861 struct mpa_v2_conn_params *mpa_v2_params;
1862 u16 plen;
1863 u16 resp_ird, resp_ord;
1864 u8 rtr_mismatch = 0, insuff_ird = 0;
1865 struct c4iw_qp_attributes attrs = {0};
1866 enum c4iw_qp_attr_mask mask;
1867 int err;
1868 struct mbuf *top, *m;
1869 int flags = MSG_DONTWAIT;
1870 struct uio uio;
1871 int disconnect = 0;
1872
1873 CTR2(KTR_IW_CXGBE, "%s:pmrB %p", __func__, ep);
1874
1875 /*
1876 * Stop mpa timer. If it expired, then
1877 * we ignore the MPA reply. process_timeout()
1878 * will abort the connection.
1879 */
1880 if (STOP_EP_TIMER(ep))
1881 return 0;
1882
1883 uio.uio_resid = 1000000;
1884 uio.uio_td = ep->com.thread;
1885 err = soreceive(ep->com.so, NULL, &uio, &top, NULL, &flags);
1886
1887 if (err) {
1888
1889 if (err == EWOULDBLOCK) {
1890
1891 CTR2(KTR_IW_CXGBE, "%s:pmr1 %p", __func__, ep);
1892 START_EP_TIMER(ep);
1893 return 0;
1894 }
1895 err = -err;
1896 CTR2(KTR_IW_CXGBE, "%s:pmr2 %p", __func__, ep);
1897 goto err;
1898 }
1899
1900 if (ep->com.so->so_rcv.sb_mb) {
1901
1902 CTR2(KTR_IW_CXGBE, "%s:pmr3 %p", __func__, ep);
1903 printf("%s data after soreceive called! so %p sb_mb %p top %p\n",
1904 __func__, ep->com.so, ep->com.so->so_rcv.sb_mb, top);
1905 }
1906
1907 m = top;
1908
1909 do {
1910
1911 CTR2(KTR_IW_CXGBE, "%s:pmr4 %p", __func__, ep);
1912 /*
1913 * If we get more than the supported amount of private data
1914 * then we must fail this connection.
1915 */
1916 if (ep->mpa_pkt_len + m->m_len > sizeof(ep->mpa_pkt)) {
1917
1918 CTR3(KTR_IW_CXGBE, "%s:pmr5 %p %d", __func__, ep,
1919 ep->mpa_pkt_len + m->m_len);
1920 err = (-EINVAL);
1921 goto err_stop_timer;
1922 }
1923
1924 /*
1925 * copy the new data into our accumulation buffer.
1926 */
1927 m_copydata(m, 0, m->m_len, &(ep->mpa_pkt[ep->mpa_pkt_len]));
1928 ep->mpa_pkt_len += m->m_len;
1929 if (!m->m_next)
1930 m = m->m_nextpkt;
1931 else
1932 m = m->m_next;
1933 } while (m);
1934
1935 m_freem(top);
1936 /*
1937 * if we don't even have the mpa message, then bail.
1938 */
1939 if (ep->mpa_pkt_len < sizeof(*mpa)) {
1940 return 0;
1941 }
1942 mpa = (struct mpa_message *) ep->mpa_pkt;
1943
1944 /* Validate MPA header. */
1945 if (mpa->revision > mpa_rev) {
1946
1947 CTR4(KTR_IW_CXGBE, "%s:pmr6 %p %d %d", __func__, ep,
1948 mpa->revision, mpa_rev);
1949 printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d, "
1950 " Received = %d\n", __func__, mpa_rev, mpa->revision);
1951 err = -EPROTO;
1952 goto err_stop_timer;
1953 }
1954
1955 if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
1956
1957 CTR2(KTR_IW_CXGBE, "%s:pmr7 %p", __func__, ep);
1958 err = -EPROTO;
1959 goto err_stop_timer;
1960 }
1961
1962 plen = ntohs(mpa->private_data_size);
1963
1964 /*
1965 * Fail if there's too much private data.
1966 */
1967 if (plen > MPA_MAX_PRIVATE_DATA) {
1968
1969 CTR2(KTR_IW_CXGBE, "%s:pmr8 %p", __func__, ep);
1970 err = -EPROTO;
1971 goto err_stop_timer;
1972 }
1973
1974 /*
1975 * If plen does not account for pkt size
1976 */
1977 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1978
1979 CTR2(KTR_IW_CXGBE, "%s:pmr9 %p", __func__, ep);
1980 STOP_EP_TIMER(ep);
1981 err = -EPROTO;
1982 goto err_stop_timer;
1983 }
1984
1985 ep->plen = (u8) plen;
1986
1987 /*
1988 * If we don't have all the pdata yet, then bail.
1989 * We'll continue process when more data arrives.
1990 */
1991 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen)) {
1992
1993 CTR2(KTR_IW_CXGBE, "%s:pmra %p", __func__, ep);
1994 return 0;
1995 }
1996
1997 if (mpa->flags & MPA_REJECT) {
1998
1999 CTR2(KTR_IW_CXGBE, "%s:pmrb %p", __func__, ep);
2000 err = -ECONNREFUSED;
2001 goto err_stop_timer;
2002 }
2003
2004 /*
2005 * If we get here we have accumulated the entire mpa
2006 * start reply message including private data. And
2007 * the MPA header is valid.
2008 */
2009 ep->com.state = FPDU_MODE;
2010 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
2011 ep->mpa_attr.recv_marker_enabled = markers_enabled;
2012 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
2013 ep->mpa_attr.version = mpa->revision;
2014 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
2015
2016 if (mpa->revision == 2) {
2017
2018 CTR2(KTR_IW_CXGBE, "%s:pmrc %p", __func__, ep);
2019 ep->mpa_attr.enhanced_rdma_conn =
2020 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
2021
2022 if (ep->mpa_attr.enhanced_rdma_conn) {
2023
2024 CTR2(KTR_IW_CXGBE, "%s:pmrd %p", __func__, ep);
2025 mpa_v2_params = (struct mpa_v2_conn_params *)
2026 (ep->mpa_pkt + sizeof(*mpa));
2027 resp_ird = ntohs(mpa_v2_params->ird) &
2028 MPA_V2_IRD_ORD_MASK;
2029 resp_ord = ntohs(mpa_v2_params->ord) &
2030 MPA_V2_IRD_ORD_MASK;
2031
2032 /*
2033 * This is a double-check. Ideally, below checks are
2034 * not required since ird/ord stuff has been taken
2035 * care of in c4iw_accept_cr
2036 */
2037 if (ep->ird < resp_ord) {
2038 if (RELAXED_IRD_NEGOTIATION && resp_ord <=
2039 ep->com.dev->rdev.adap->params.max_ordird_qp)
2040 ep->ird = resp_ord;
2041 else
2042 insuff_ird = 1;
2043 } else if (ep->ird > resp_ord) {
2044 ep->ird = resp_ord;
2045 }
2046 if (ep->ord > resp_ird) {
2047 if (RELAXED_IRD_NEGOTIATION)
2048 ep->ord = resp_ird;
2049 else
2050 insuff_ird = 1;
2051 }
2052 if (insuff_ird) {
2053 err = -ENOMEM;
2054 ep->ird = resp_ord;
2055 ep->ord = resp_ird;
2056 }
2057
2058 if (ntohs(mpa_v2_params->ird) &
2059 MPA_V2_PEER2PEER_MODEL) {
2060
2061 CTR2(KTR_IW_CXGBE, "%s:pmrf %p", __func__, ep);
2062 if (ntohs(mpa_v2_params->ord) &
2063 MPA_V2_RDMA_WRITE_RTR) {
2064
2065 CTR2(KTR_IW_CXGBE, "%s:pmrg %p", __func__, ep);
2066 ep->mpa_attr.p2p_type =
2067 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
2068 }
2069 else if (ntohs(mpa_v2_params->ord) &
2070 MPA_V2_RDMA_READ_RTR) {
2071
2072 CTR2(KTR_IW_CXGBE, "%s:pmrh %p", __func__, ep);
2073 ep->mpa_attr.p2p_type =
2074 FW_RI_INIT_P2PTYPE_READ_REQ;
2075 }
2076 }
2077 }
2078 } else {
2079
2080 CTR2(KTR_IW_CXGBE, "%s:pmri %p", __func__, ep);
2081
2082 if (mpa->revision == 1) {
2083
2084 CTR2(KTR_IW_CXGBE, "%s:pmrj %p", __func__, ep);
2085
2086 if (peer2peer) {
2087
2088 CTR2(KTR_IW_CXGBE, "%s:pmrk %p", __func__, ep);
2089 ep->mpa_attr.p2p_type = p2p_type;
2090 }
2091 }
2092 }
2093
2094 if (set_tcpinfo(ep)) {
2095
2096 CTR2(KTR_IW_CXGBE, "%s:pmrl %p", __func__, ep);
2097 printf("%s set_tcpinfo error\n", __func__);
2098 err = -ECONNRESET;
2099 goto err;
2100 }
2101
2102 CTR6(KTR_IW_CXGBE, "%s - crc_enabled = %d, recv_marker_enabled = %d, "
2103 "xmit_marker_enabled = %d, version = %d p2p_type = %d", __func__,
2104 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
2105 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
2106 ep->mpa_attr.p2p_type);
2107
2108 /*
2109 * If responder's RTR does not match with that of initiator, assign
2110 * FW_RI_INIT_P2PTYPE_DISABLED in mpa attributes so that RTR is not
2111 * generated when moving QP to RTS state.
2112 * A TERM message will be sent after QP has moved to RTS state
2113 */
2114 if ((ep->mpa_attr.version == 2) && peer2peer &&
2115 (ep->mpa_attr.p2p_type != p2p_type)) {
2116
2117 CTR2(KTR_IW_CXGBE, "%s:pmrm %p", __func__, ep);
2118 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
2119 rtr_mismatch = 1;
2120 }
2121
2122
2123 //ep->ofld_txq = TOEPCB(ep->com.so)->ofld_txq;
2124 attrs.mpa_attr = ep->mpa_attr;
2125 attrs.max_ird = ep->ird;
2126 attrs.max_ord = ep->ord;
2127 attrs.llp_stream_handle = ep;
2128 attrs.next_state = C4IW_QP_STATE_RTS;
2129
2130 mask = C4IW_QP_ATTR_NEXT_STATE |
2131 C4IW_QP_ATTR_LLP_STREAM_HANDLE | C4IW_QP_ATTR_MPA_ATTR |
2132 C4IW_QP_ATTR_MAX_IRD | C4IW_QP_ATTR_MAX_ORD;
2133
2134 /* bind QP and TID with INIT_WR */
2135 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp, mask, &attrs, 1);
2136
2137 if (err) {
2138
2139 CTR2(KTR_IW_CXGBE, "%s:pmrn %p", __func__, ep);
2140 goto err;
2141 }
2142
2143 /*
2144 * If responder's RTR requirement did not match with what initiator
2145 * supports, generate TERM message
2146 */
2147 if (rtr_mismatch) {
2148
2149 CTR2(KTR_IW_CXGBE, "%s:pmro %p", __func__, ep);
2150 printk(KERN_ERR "%s: RTR mismatch, sending TERM\n", __func__);
2151 attrs.layer_etype = LAYER_MPA | DDP_LLP;
2152 attrs.ecode = MPA_NOMATCH_RTR;
2153 attrs.next_state = C4IW_QP_STATE_TERMINATE;
2154 attrs.send_term = 1;
2155 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2156 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2157 err = -ENOMEM;
2158 disconnect = 1;
2159 goto out;
2160 }
2161
2162 /*
2163 * Generate TERM if initiator IRD is not sufficient for responder
2164 * provided ORD. Currently, we do the same behaviour even when
2165 * responder provided IRD is also not sufficient as regards to
2166 * initiator ORD.
2167 */
2168 if (insuff_ird) {
2169
2170 CTR2(KTR_IW_CXGBE, "%s:pmrp %p", __func__, ep);
2171 printk(KERN_ERR "%s: Insufficient IRD, sending TERM\n",
2172 __func__);
2173 attrs.layer_etype = LAYER_MPA | DDP_LLP;
2174 attrs.ecode = MPA_INSUFF_IRD;
2175 attrs.next_state = C4IW_QP_STATE_TERMINATE;
2176 attrs.send_term = 1;
2177 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2178 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2179 err = -ENOMEM;
2180 disconnect = 1;
2181 goto out;
2182 }
2183 goto out;
2184 err_stop_timer:
2185 STOP_EP_TIMER(ep);
2186 err:
2187 disconnect = 2;
2188 out:
2189 connect_reply_upcall(ep, err);
2190 CTR2(KTR_IW_CXGBE, "%s:pmrE %p", __func__, ep);
2191 return disconnect;
2192 }
2193
2194 /*
2195 * process_mpa_request - process streaming mode MPA request
2196 *
2197 * Returns:
2198 *
2199 * 0 upon success indicating a connect request was delivered to the ULP
2200 * or the mpa request is incomplete but valid so far.
2201 *
2202 * 1 if a failure requires the caller to close the connection.
2203 *
2204 * 2 if a failure requires the caller to abort the connection.
2205 */
2206 static int
process_mpa_request(struct c4iw_ep * ep)2207 process_mpa_request(struct c4iw_ep *ep)
2208 {
2209 struct mpa_message *mpa;
2210 struct mpa_v2_conn_params *mpa_v2_params;
2211 u16 plen;
2212 int flags = MSG_DONTWAIT;
2213 int rc;
2214 struct iovec iov;
2215 struct uio uio;
2216 enum c4iw_ep_state state = ep->com.state;
2217
2218 CTR3(KTR_IW_CXGBE, "%s: ep %p, state %s", __func__, ep, states[state]);
2219
2220 if (state != MPA_REQ_WAIT)
2221 return 0;
2222
2223 iov.iov_base = &ep->mpa_pkt[ep->mpa_pkt_len];
2224 iov.iov_len = sizeof(ep->mpa_pkt) - ep->mpa_pkt_len;
2225 uio.uio_iov = &iov;
2226 uio.uio_iovcnt = 1;
2227 uio.uio_offset = 0;
2228 uio.uio_resid = sizeof(ep->mpa_pkt) - ep->mpa_pkt_len;
2229 uio.uio_segflg = UIO_SYSSPACE;
2230 uio.uio_rw = UIO_READ;
2231 uio.uio_td = NULL; /* uio.uio_td = ep->com.thread; */
2232
2233 rc = soreceive(ep->com.so, NULL, &uio, NULL, NULL, &flags);
2234 if (rc == EAGAIN)
2235 return 0;
2236 else if (rc)
2237 goto err_stop_timer;
2238
2239 KASSERT(uio.uio_offset > 0, ("%s: sorecieve on so %p read no data",
2240 __func__, ep->com.so));
2241 ep->mpa_pkt_len += uio.uio_offset;
2242
2243 /*
2244 * If we get more than the supported amount of private data then we must
2245 * fail this connection. XXX: check so_rcv->sb_cc, or peek with another
2246 * soreceive, or increase the size of mpa_pkt by 1 and abort if the last
2247 * byte is filled by the soreceive above.
2248 */
2249
2250 /* Don't even have the MPA message. Wait for more data to arrive. */
2251 if (ep->mpa_pkt_len < sizeof(*mpa))
2252 return 0;
2253 mpa = (struct mpa_message *) ep->mpa_pkt;
2254
2255 /*
2256 * Validate MPA Header.
2257 */
2258 if (mpa->revision > mpa_rev) {
2259 log(LOG_ERR, "%s: MPA version mismatch. Local = %d,"
2260 " Received = %d\n", __func__, mpa_rev, mpa->revision);
2261 goto err_stop_timer;
2262 }
2263
2264 if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key)))
2265 goto err_stop_timer;
2266
2267 /*
2268 * Fail if there's too much private data.
2269 */
2270 plen = ntohs(mpa->private_data_size);
2271 if (plen > MPA_MAX_PRIVATE_DATA)
2272 goto err_stop_timer;
2273
2274 /*
2275 * If plen does not account for pkt size
2276 */
2277 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen))
2278 goto err_stop_timer;
2279
2280 ep->plen = (u8) plen;
2281
2282 /*
2283 * If we don't have all the pdata yet, then bail.
2284 */
2285 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
2286 return 0;
2287
2288 /*
2289 * If we get here we have accumulated the entire mpa
2290 * start reply message including private data.
2291 */
2292 ep->mpa_attr.initiator = 0;
2293 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
2294 ep->mpa_attr.recv_marker_enabled = markers_enabled;
2295 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
2296 ep->mpa_attr.version = mpa->revision;
2297 if (mpa->revision == 1)
2298 ep->tried_with_mpa_v1 = 1;
2299 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
2300
2301 if (mpa->revision == 2) {
2302 ep->mpa_attr.enhanced_rdma_conn =
2303 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
2304 if (ep->mpa_attr.enhanced_rdma_conn) {
2305 mpa_v2_params = (struct mpa_v2_conn_params *)
2306 (ep->mpa_pkt + sizeof(*mpa));
2307 ep->ird = ntohs(mpa_v2_params->ird) &
2308 MPA_V2_IRD_ORD_MASK;
2309 ep->ird = min_t(u32, ep->ird,
2310 cur_max_read_depth(ep->com.dev));
2311 ep->ord = ntohs(mpa_v2_params->ord) &
2312 MPA_V2_IRD_ORD_MASK;
2313 ep->ord = min_t(u32, ep->ord,
2314 cur_max_read_depth(ep->com.dev));
2315 CTR3(KTR_IW_CXGBE, "%s initiator ird %u ord %u",
2316 __func__, ep->ird, ep->ord);
2317 if (ntohs(mpa_v2_params->ird) & MPA_V2_PEER2PEER_MODEL)
2318 if (peer2peer) {
2319 if (ntohs(mpa_v2_params->ord) &
2320 MPA_V2_RDMA_WRITE_RTR)
2321 ep->mpa_attr.p2p_type =
2322 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
2323 else if (ntohs(mpa_v2_params->ord) &
2324 MPA_V2_RDMA_READ_RTR)
2325 ep->mpa_attr.p2p_type =
2326 FW_RI_INIT_P2PTYPE_READ_REQ;
2327 }
2328 }
2329 } else if (mpa->revision == 1 && peer2peer)
2330 ep->mpa_attr.p2p_type = p2p_type;
2331
2332 if (set_tcpinfo(ep))
2333 goto err_stop_timer;
2334
2335 CTR5(KTR_IW_CXGBE, "%s: crc_enabled = %d, recv_marker_enabled = %d, "
2336 "xmit_marker_enabled = %d, version = %d", __func__,
2337 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
2338 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version);
2339
2340 ep->com.state = MPA_REQ_RCVD;
2341 STOP_EP_TIMER(ep);
2342
2343 /* drive upcall */
2344 if (ep->parent_ep->com.state != DEAD)
2345 if (connect_request_upcall(ep))
2346 goto err_out;
2347 return 0;
2348
2349 err_stop_timer:
2350 STOP_EP_TIMER(ep);
2351 err_out:
2352 return 2;
2353 }
2354
2355 /*
2356 * Upcall from the adapter indicating data has been transmitted.
2357 * For us its just the single MPA request or reply. We can now free
2358 * the skb holding the mpa message.
2359 */
c4iw_reject_cr(struct iw_cm_id * cm_id,const void * pdata,u8 pdata_len)2360 int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
2361 {
2362 #ifdef KTR
2363 int err;
2364 #endif
2365 struct c4iw_ep *ep = to_ep(cm_id);
2366 int abort = 0;
2367
2368 mutex_lock(&ep->com.mutex);
2369 CTR2(KTR_IW_CXGBE, "%s:crcB %p", __func__, ep);
2370
2371 if (ep->com.state != MPA_REQ_RCVD) {
2372 CTR2(KTR_IW_CXGBE, "%s:crc1 %p", __func__, ep);
2373 mutex_unlock(&ep->com.mutex);
2374 c4iw_put_ep(&ep->com);
2375 return -ECONNRESET;
2376 }
2377 set_bit(ULP_REJECT, &ep->com.history);
2378
2379 if (mpa_rev == 0) {
2380
2381 CTR2(KTR_IW_CXGBE, "%s:crc2 %p", __func__, ep);
2382 abort = 1;
2383 }
2384 else {
2385
2386 CTR2(KTR_IW_CXGBE, "%s:crc3 %p", __func__, ep);
2387 abort = send_mpa_reject(ep, pdata, pdata_len);
2388 }
2389 mutex_unlock(&ep->com.mutex);
2390
2391 STOP_EP_TIMER(ep);
2392 #ifdef KTR
2393 err = c4iw_ep_disconnect(ep, abort != 0, GFP_KERNEL);
2394 #else
2395 c4iw_ep_disconnect(ep, abort != 0, GFP_KERNEL);
2396 #endif
2397 c4iw_put_ep(&ep->com);
2398 CTR3(KTR_IW_CXGBE, "%s:crc4 %p, err: %d", __func__, ep, err);
2399 return 0;
2400 }
2401
c4iw_accept_cr(struct iw_cm_id * cm_id,struct iw_cm_conn_param * conn_param)2402 int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2403 {
2404 int err;
2405 struct c4iw_qp_attributes attrs = {0};
2406 enum c4iw_qp_attr_mask mask;
2407 struct c4iw_ep *ep = to_ep(cm_id);
2408 struct c4iw_dev *h = to_c4iw_dev(cm_id->device);
2409 struct c4iw_qp *qp = get_qhp(h, conn_param->qpn);
2410 int abort = 0;
2411
2412 mutex_lock(&ep->com.mutex);
2413 CTR2(KTR_IW_CXGBE, "%s:cacB %p", __func__, ep);
2414
2415 if ((ep->com.state == DEAD) ||
2416 (ep->com.state != MPA_REQ_RCVD)) {
2417
2418 CTR2(KTR_IW_CXGBE, "%s:cac1 %p", __func__, ep);
2419 err = -ECONNRESET;
2420 goto err_out;
2421 }
2422
2423 BUG_ON(!qp);
2424
2425 set_bit(ULP_ACCEPT, &ep->com.history);
2426
2427 if ((conn_param->ord > c4iw_max_read_depth) ||
2428 (conn_param->ird > c4iw_max_read_depth)) {
2429
2430 CTR2(KTR_IW_CXGBE, "%s:cac2 %p", __func__, ep);
2431 err = -EINVAL;
2432 goto err_abort;
2433 }
2434
2435 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
2436
2437 CTR2(KTR_IW_CXGBE, "%s:cac3 %p", __func__, ep);
2438
2439 if (conn_param->ord > ep->ird) {
2440 if (RELAXED_IRD_NEGOTIATION) {
2441 conn_param->ord = ep->ird;
2442 } else {
2443 ep->ird = conn_param->ird;
2444 ep->ord = conn_param->ord;
2445 send_mpa_reject(ep, conn_param->private_data,
2446 conn_param->private_data_len);
2447 err = -ENOMEM;
2448 goto err_abort;
2449 }
2450 }
2451 if (conn_param->ird < ep->ord) {
2452 if (RELAXED_IRD_NEGOTIATION &&
2453 ep->ord <= h->rdev.adap->params.max_ordird_qp) {
2454 conn_param->ird = ep->ord;
2455 } else {
2456 err = -ENOMEM;
2457 goto err_abort;
2458 }
2459 }
2460 }
2461 ep->ird = conn_param->ird;
2462 ep->ord = conn_param->ord;
2463
2464 if (ep->mpa_attr.version == 1) {
2465 if (peer2peer && ep->ird == 0)
2466 ep->ird = 1;
2467 } else {
2468 if (peer2peer &&
2469 (ep->mpa_attr.p2p_type != FW_RI_INIT_P2PTYPE_DISABLED) &&
2470 (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ) && ep->ird == 0)
2471 ep->ird = 1;
2472 }
2473
2474 CTR4(KTR_IW_CXGBE, "%s %d ird %d ord %d", __func__, __LINE__,
2475 ep->ird, ep->ord);
2476
2477 ep->com.cm_id = cm_id;
2478 ref_cm_id(&ep->com);
2479 ep->com.qp = qp;
2480 ref_qp(ep);
2481 //ep->ofld_txq = TOEPCB(ep->com.so)->ofld_txq;
2482
2483 /* bind QP to EP and move to RTS */
2484 attrs.mpa_attr = ep->mpa_attr;
2485 attrs.max_ird = ep->ird;
2486 attrs.max_ord = ep->ord;
2487 attrs.llp_stream_handle = ep;
2488 attrs.next_state = C4IW_QP_STATE_RTS;
2489
2490 /* bind QP and TID with INIT_WR */
2491 mask = C4IW_QP_ATTR_NEXT_STATE |
2492 C4IW_QP_ATTR_LLP_STREAM_HANDLE |
2493 C4IW_QP_ATTR_MPA_ATTR |
2494 C4IW_QP_ATTR_MAX_IRD |
2495 C4IW_QP_ATTR_MAX_ORD;
2496
2497 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp, mask, &attrs, 1);
2498 if (err) {
2499 CTR3(KTR_IW_CXGBE, "%s:caca %p, err: %d", __func__, ep, err);
2500 goto err_defef_cm_id;
2501 }
2502
2503 err = send_mpa_reply(ep, conn_param->private_data,
2504 conn_param->private_data_len);
2505 if (err) {
2506 CTR3(KTR_IW_CXGBE, "%s:cacb %p, err: %d", __func__, ep, err);
2507 goto err_defef_cm_id;
2508 }
2509
2510 ep->com.state = FPDU_MODE;
2511 established_upcall(ep);
2512 mutex_unlock(&ep->com.mutex);
2513 c4iw_put_ep(&ep->com);
2514 CTR2(KTR_IW_CXGBE, "%s:cacE %p", __func__, ep);
2515 return 0;
2516 err_defef_cm_id:
2517 deref_cm_id(&ep->com);
2518 err_abort:
2519 abort = 1;
2520 err_out:
2521 mutex_unlock(&ep->com.mutex);
2522 if (abort)
2523 c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
2524 c4iw_put_ep(&ep->com);
2525 CTR2(KTR_IW_CXGBE, "%s:cacE err %p", __func__, ep);
2526 return err;
2527 }
2528
2529 static int
c4iw_sock_create(struct sockaddr_storage * laddr,struct socket ** so)2530 c4iw_sock_create(struct sockaddr_storage *laddr, struct socket **so)
2531 {
2532 int ret;
2533 int size, on;
2534 struct socket *sock = NULL;
2535 struct sockopt sopt;
2536
2537 ret = sock_create_kern(laddr->ss_family,
2538 SOCK_STREAM, IPPROTO_TCP, &sock);
2539 if (ret) {
2540 CTR2(KTR_IW_CXGBE, "%s:Failed to create TCP socket. err %d",
2541 __func__, ret);
2542 return ret;
2543 }
2544
2545 if (reuseaddr) {
2546 bzero(&sopt, sizeof(struct sockopt));
2547 sopt.sopt_dir = SOPT_SET;
2548 sopt.sopt_level = SOL_SOCKET;
2549 sopt.sopt_name = SO_REUSEADDR;
2550 on = 1;
2551 sopt.sopt_val = &on;
2552 sopt.sopt_valsize = sizeof(on);
2553 ret = -sosetopt(sock, &sopt);
2554 if (ret != 0) {
2555 log(LOG_ERR, "%s: sosetopt(%p, SO_REUSEADDR) "
2556 "failed with %d.\n", __func__, sock, ret);
2557 }
2558 bzero(&sopt, sizeof(struct sockopt));
2559 sopt.sopt_dir = SOPT_SET;
2560 sopt.sopt_level = SOL_SOCKET;
2561 sopt.sopt_name = SO_REUSEPORT;
2562 on = 1;
2563 sopt.sopt_val = &on;
2564 sopt.sopt_valsize = sizeof(on);
2565 ret = -sosetopt(sock, &sopt);
2566 if (ret != 0) {
2567 log(LOG_ERR, "%s: sosetopt(%p, SO_REUSEPORT) "
2568 "failed with %d.\n", __func__, sock, ret);
2569 }
2570 }
2571
2572 ret = -sobind(sock, (struct sockaddr *)laddr, curthread);
2573 if (ret) {
2574 CTR2(KTR_IW_CXGBE, "%s:Failed to bind socket. err %p",
2575 __func__, ret);
2576 sock_release(sock);
2577 return ret;
2578 }
2579
2580 size = laddr->ss_family == AF_INET6 ?
2581 sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in);
2582 ret = sock_getname(sock, (struct sockaddr *)laddr, &size, 0);
2583 if (ret) {
2584 CTR2(KTR_IW_CXGBE, "%s:sock_getname failed. err %p",
2585 __func__, ret);
2586 sock_release(sock);
2587 return ret;
2588 }
2589
2590 *so = sock;
2591 return 0;
2592 }
2593
c4iw_connect(struct iw_cm_id * cm_id,struct iw_cm_conn_param * conn_param)2594 int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2595 {
2596 int err = 0;
2597 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
2598 struct c4iw_ep *ep = NULL;
2599 if_t nh_ifp; /* Logical egress interface */
2600 struct epoch_tracker et;
2601 #ifdef VIMAGE
2602 struct rdma_cm_id *rdma_id = (struct rdma_cm_id*)cm_id->context;
2603 struct vnet *vnet = rdma_id->route.addr.dev_addr.net;
2604 #endif
2605
2606 CTR2(KTR_IW_CXGBE, "%s:ccB %p", __func__, cm_id);
2607
2608 if (__predict_false(c4iw_stopped(&dev->rdev)))
2609 return -EIO;
2610
2611 if ((conn_param->ord > c4iw_max_read_depth) ||
2612 (conn_param->ird > c4iw_max_read_depth)) {
2613
2614 CTR2(KTR_IW_CXGBE, "%s:cc1 %p", __func__, cm_id);
2615 err = -EINVAL;
2616 goto out;
2617 }
2618 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
2619 cm_id->provider_data = ep;
2620
2621 timer_setup(&ep->timer, ep_timeout, 0);
2622 ep->plen = conn_param->private_data_len;
2623
2624 if (ep->plen) {
2625
2626 CTR2(KTR_IW_CXGBE, "%s:cc3 %p", __func__, ep);
2627 memcpy(ep->mpa_pkt + sizeof(struct mpa_message),
2628 conn_param->private_data, ep->plen);
2629 }
2630 ep->ird = conn_param->ird;
2631 ep->ord = conn_param->ord;
2632
2633 if (peer2peer && ep->ord == 0) {
2634
2635 CTR2(KTR_IW_CXGBE, "%s:cc4 %p", __func__, ep);
2636 ep->ord = 1;
2637 }
2638
2639 ep->com.dev = dev;
2640 ep->com.cm_id = cm_id;
2641 ref_cm_id(&ep->com);
2642 ep->com.qp = get_qhp(dev, conn_param->qpn);
2643
2644 if (!ep->com.qp) {
2645
2646 CTR2(KTR_IW_CXGBE, "%s:cc5 %p", __func__, ep);
2647 err = -EINVAL;
2648 goto fail;
2649 }
2650 ref_qp(ep);
2651 ep->com.thread = curthread;
2652
2653 NET_EPOCH_ENTER(et);
2654 CURVNET_SET(vnet);
2655 err = get_ifnet_from_raddr(&cm_id->remote_addr, &nh_ifp);
2656 CURVNET_RESTORE();
2657 NET_EPOCH_EXIT(et);
2658
2659 if (err) {
2660
2661 CTR2(KTR_IW_CXGBE, "%s:cc7 %p", __func__, ep);
2662 printk(KERN_ERR MOD "%s - cannot find route.\n", __func__);
2663 return -EHOSTUNREACH;
2664 }
2665
2666 if (!(if_getcapenable(nh_ifp) & IFCAP_TOE) ||
2667 TOEDEV(nh_ifp) == NULL) {
2668 err = -ENOPROTOOPT;
2669 goto fail;
2670 }
2671 ep->com.state = CONNECTING;
2672 ep->tos = 0;
2673 ep->com.local_addr = cm_id->m_local_addr;
2674 ep->com.remote_addr = cm_id->m_remote_addr;
2675
2676 err = c4iw_sock_create(&cm_id->m_local_addr, &ep->com.so);
2677 if (err)
2678 goto fail;
2679
2680 setiwsockopt(ep->com.so);
2681 init_iwarp_socket(ep->com.so, &ep->com);
2682 err = -soconnect(ep->com.so, (struct sockaddr *)&ep->com.remote_addr,
2683 ep->com.thread);
2684 if (err)
2685 goto fail_free_so;
2686 CTR2(KTR_IW_CXGBE, "%s:ccE, ep %p", __func__, ep);
2687 return 0;
2688
2689 fail_free_so:
2690 uninit_iwarp_socket(ep->com.so);
2691 ep->com.state = DEAD;
2692 sock_release(ep->com.so);
2693 fail:
2694 deref_cm_id(&ep->com);
2695 c4iw_put_ep(&ep->com);
2696 ep = NULL;
2697 out:
2698 CTR2(KTR_IW_CXGBE, "%s:ccE Error %d", __func__, err);
2699 return err;
2700 }
2701
2702 /*
2703 * iwcm->create_listen. Returns -errno on failure.
2704 */
2705 int
c4iw_create_listen(struct iw_cm_id * cm_id,int backlog)2706 c4iw_create_listen(struct iw_cm_id *cm_id, int backlog)
2707 {
2708 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
2709 struct c4iw_listen_ep *lep = NULL;
2710 struct listen_port_info *port_info = NULL;
2711 int rc = 0;
2712
2713 CTR3(KTR_IW_CXGBE, "%s: cm_id %p, backlog %d", __func__, cm_id,
2714 backlog);
2715 if (c4iw_stopped(&dev->rdev)) {
2716 CTR2(KTR_IW_CXGBE, "%s: cm_id %p, stopped", __func__, cm_id);
2717 return -EIO;
2718 }
2719 lep = alloc_ep(sizeof(*lep), GFP_KERNEL);
2720 lep->com.cm_id = cm_id;
2721 ref_cm_id(&lep->com);
2722 lep->com.dev = dev;
2723 lep->backlog = backlog;
2724 lep->com.local_addr = cm_id->m_local_addr;
2725 lep->com.thread = curthread;
2726 cm_id->provider_data = lep;
2727 lep->com.state = LISTEN;
2728
2729 /* In case of INDADDR_ANY, ibcore creates cmid for each device and
2730 * invokes iw_cxgbe listener callbacks assuming that iw_cxgbe creates
2731 * HW listeners for each device seperately. But toecore expects single
2732 * solisten() call with INADDR_ANY address to create HW listeners on
2733 * all devices for a given port number. So iw_cxgbe driver calls
2734 * solisten() only once for INADDR_ANY(usually done at first time
2735 * listener callback from ibcore). And all the subsequent INADDR_ANY
2736 * listener callbacks from ibcore(for the same port address) do not
2737 * invoke solisten() as first listener callback has already created
2738 * listeners for all other devices(via solisten).
2739 */
2740 if (c4iw_any_addr((struct sockaddr *)&lep->com.local_addr, NULL)) {
2741 port_info = add_ep_to_listenlist(lep);
2742 /* skip solisten() if refcnt > 1, as the listeners were
2743 * already created by 'Master lep'
2744 */
2745 if (port_info->refcnt > 1) {
2746 /* As there will be only one listener socket for a TCP
2747 * port, copy Master lep's socket pointer to other lep's
2748 * that are belonging to same TCP port.
2749 */
2750 struct c4iw_listen_ep *head_lep =
2751 container_of(port_info->lep_list.next,
2752 struct c4iw_listen_ep, listen_ep_list);
2753 lep->com.so = head_lep->com.so;
2754 goto out;
2755 }
2756 }
2757 rc = c4iw_sock_create(&cm_id->m_local_addr, &lep->com.so);
2758 if (rc) {
2759 CTR2(KTR_IW_CXGBE, "%s:Failed to create socket. err %d",
2760 __func__, rc);
2761 goto fail;
2762 }
2763
2764 rc = -solisten(lep->com.so, backlog, curthread);
2765 if (rc) {
2766 CTR3(KTR_IW_CXGBE, "%s:Failed to listen on sock:%p. err %d",
2767 __func__, lep->com.so, rc);
2768 goto fail_free_so;
2769 }
2770 init_iwarp_socket(lep->com.so, &lep->com);
2771 out:
2772 return 0;
2773
2774 fail_free_so:
2775 sock_release(lep->com.so);
2776 fail:
2777 if (port_info)
2778 rem_ep_from_listenlist(lep);
2779 deref_cm_id(&lep->com);
2780 c4iw_put_ep(&lep->com);
2781 return rc;
2782 }
2783
2784 int
c4iw_destroy_listen(struct iw_cm_id * cm_id)2785 c4iw_destroy_listen(struct iw_cm_id *cm_id)
2786 {
2787 struct c4iw_listen_ep *lep = to_listen_ep(cm_id);
2788
2789 mutex_lock(&lep->com.mutex);
2790 CTR3(KTR_IW_CXGBE, "%s: cm_id %p, state %s", __func__, cm_id,
2791 states[lep->com.state]);
2792
2793 lep->com.state = DEAD;
2794 if (c4iw_any_addr((struct sockaddr *)&lep->com.local_addr,
2795 lep->com.so->so_vnet)) {
2796 /* if no refcount then close listen socket */
2797 if (!rem_ep_from_listenlist(lep))
2798 close_socket(lep->com.so);
2799 } else
2800 close_socket(lep->com.so);
2801 deref_cm_id(&lep->com);
2802 mutex_unlock(&lep->com.mutex);
2803 c4iw_put_ep(&lep->com);
2804 return 0;
2805 }
2806
__c4iw_ep_disconnect(struct c4iw_ep * ep,int abrupt,gfp_t gfp)2807 int __c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp)
2808 {
2809 int ret;
2810 mutex_lock(&ep->com.mutex);
2811 ret = c4iw_ep_disconnect(ep, abrupt, gfp);
2812 mutex_unlock(&ep->com.mutex);
2813 return ret;
2814 }
2815
c4iw_ep_disconnect(struct c4iw_ep * ep,int abrupt,gfp_t gfp)2816 int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp)
2817 {
2818 int ret = 0;
2819 int close = 0;
2820 struct c4iw_rdev *rdev;
2821
2822
2823 CTR2(KTR_IW_CXGBE, "%s:cedB %p", __func__, ep);
2824
2825 rdev = &ep->com.dev->rdev;
2826
2827 if (c4iw_stopped(rdev)) {
2828 CTR3(KTR_IW_CXGBE, "%s:ced1 stopped %p %s", __func__, ep,
2829 states[ep->com.state]);
2830 if (ep->com.state != DEAD) {
2831 send_abort(ep);
2832 ep->com.state = DEAD;
2833 }
2834 close_complete_upcall(ep, -ECONNRESET);
2835 return ECONNRESET;
2836 }
2837 CTR3(KTR_IW_CXGBE, "%s:ced2 %p %s", __func__, ep,
2838 states[ep->com.state]);
2839
2840 /*
2841 * Ref the ep here in case we have fatal errors causing the
2842 * ep to be released and freed.
2843 */
2844 c4iw_get_ep(&ep->com);
2845 switch (ep->com.state) {
2846
2847 case MPA_REQ_WAIT:
2848 case MPA_REQ_SENT:
2849 case MPA_REQ_RCVD:
2850 case MPA_REP_SENT:
2851 case FPDU_MODE:
2852 close = 1;
2853 if (abrupt)
2854 ep->com.state = ABORTING;
2855 else {
2856 ep->com.state = CLOSING;
2857 START_EP_TIMER(ep);
2858 }
2859 set_bit(CLOSE_SENT, &ep->com.flags);
2860 break;
2861
2862 case CLOSING:
2863
2864 if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
2865
2866 close = 1;
2867 if (abrupt) {
2868 STOP_EP_TIMER(ep);
2869 ep->com.state = ABORTING;
2870 } else
2871 ep->com.state = MORIBUND;
2872 }
2873 break;
2874
2875 case MORIBUND:
2876 case ABORTING:
2877 case DEAD:
2878 CTR3(KTR_IW_CXGBE,
2879 "%s ignoring disconnect ep %p state %u", __func__,
2880 ep, ep->com.state);
2881 break;
2882
2883 default:
2884 BUG();
2885 break;
2886 }
2887
2888
2889 if (close) {
2890
2891 CTR2(KTR_IW_CXGBE, "%s:ced3 %p", __func__, ep);
2892
2893 if (abrupt) {
2894
2895 CTR2(KTR_IW_CXGBE, "%s:ced4 %p", __func__, ep);
2896 set_bit(EP_DISC_ABORT, &ep->com.history);
2897 close_complete_upcall(ep, -ECONNRESET);
2898 send_abort(ep);
2899 } else {
2900
2901 CTR2(KTR_IW_CXGBE, "%s:ced5 %p", __func__, ep);
2902 set_bit(EP_DISC_CLOSE, &ep->com.history);
2903
2904 if (!ep->parent_ep)
2905 ep->com.state = MORIBUND;
2906
2907 CURVNET_SET(ep->com.so->so_vnet);
2908 ret = sodisconnect(ep->com.so);
2909 CURVNET_RESTORE();
2910 if (ret) {
2911 CTR2(KTR_IW_CXGBE, "%s:ced6 %p", __func__, ep);
2912 STOP_EP_TIMER(ep);
2913 send_abort(ep);
2914 ep->com.state = DEAD;
2915 close_complete_upcall(ep, -ECONNRESET);
2916 set_bit(EP_DISC_FAIL, &ep->com.history);
2917 if (ep->com.qp) {
2918 struct c4iw_qp_attributes attrs = {0};
2919
2920 attrs.next_state = C4IW_QP_STATE_ERROR;
2921 ret = c4iw_modify_qp(
2922 ep->com.dev, ep->com.qp,
2923 C4IW_QP_ATTR_NEXT_STATE,
2924 &attrs, 1);
2925 CTR3(KTR_IW_CXGBE, "%s:ced7 %p ret %d",
2926 __func__, ep, ret);
2927 }
2928 }
2929 }
2930 }
2931 c4iw_put_ep(&ep->com);
2932 CTR2(KTR_IW_CXGBE, "%s:cedE %p", __func__, ep);
2933 return ret;
2934 }
2935
2936 #ifdef C4IW_EP_REDIRECT
c4iw_ep_redirect(void * ctx,struct dst_entry * old,struct dst_entry * new,struct l2t_entry * l2t)2937 int c4iw_ep_redirect(void *ctx, struct dst_entry *old, struct dst_entry *new,
2938 struct l2t_entry *l2t)
2939 {
2940 struct c4iw_ep *ep = ctx;
2941
2942 if (ep->dst != old)
2943 return 0;
2944
2945 PDBG("%s ep %p redirect to dst %p l2t %p\n", __func__, ep, new,
2946 l2t);
2947 dst_hold(new);
2948 cxgb4_l2t_release(ep->l2t);
2949 ep->l2t = l2t;
2950 dst_release(old);
2951 ep->dst = new;
2952 return 1;
2953 }
2954 #endif
2955
2956
2957
ep_timeout(struct timer_list * t)2958 static void ep_timeout(struct timer_list *t)
2959 {
2960 struct c4iw_ep *ep = timer_container_of(ep, t, timer);
2961
2962 if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
2963
2964 /*
2965 * Only insert if it is not already on the list.
2966 */
2967 if (!(ep->com.ep_events & C4IW_EVENT_TIMEOUT)) {
2968 CTR2(KTR_IW_CXGBE, "%s:et1 %p", __func__, ep);
2969 add_ep_to_req_list(ep, C4IW_EVENT_TIMEOUT);
2970 }
2971 }
2972 }
2973
fw6_wr_rpl(struct adapter * sc,const __be64 * rpl)2974 static int fw6_wr_rpl(struct adapter *sc, const __be64 *rpl)
2975 {
2976 uint64_t val = be64toh(*rpl);
2977 int ret;
2978 struct c4iw_wr_wait *wr_waitp;
2979
2980 ret = (int)((val >> 8) & 0xff);
2981 wr_waitp = (struct c4iw_wr_wait *)rpl[1];
2982 CTR3(KTR_IW_CXGBE, "%s wr_waitp %p ret %u", __func__, wr_waitp, ret);
2983 if (wr_waitp)
2984 c4iw_wake_up_deref(wr_waitp, ret ? -ret : 0);
2985
2986 return (0);
2987 }
2988
fw6_cqe_handler(struct adapter * sc,const __be64 * rpl)2989 static int fw6_cqe_handler(struct adapter *sc, const __be64 *rpl)
2990 {
2991 struct cqe_list_entry *cle;
2992 unsigned long flag;
2993
2994 cle = malloc(sizeof(*cle), M_CXGBE, M_NOWAIT);
2995 cle->rhp = sc->iwarp_softc;
2996 cle->err_cqe = *(const struct t4_cqe *)(&rpl[0]);
2997
2998 spin_lock_irqsave(&err_cqe_lock, flag);
2999 list_add_tail(&cle->entry, &err_cqe_list);
3000 queue_work(c4iw_taskq, &c4iw_task);
3001 spin_unlock_irqrestore(&err_cqe_lock, flag);
3002
3003 return (0);
3004 }
3005
3006 static int
process_terminate(struct c4iw_ep * ep)3007 process_terminate(struct c4iw_ep *ep)
3008 {
3009 struct c4iw_qp_attributes attrs = {0};
3010 unsigned int tid = ep->hwtid;
3011
3012 CTR2(KTR_IW_CXGBE, "%s:tB %p %d", __func__, ep);
3013
3014 if (ep && ep->com.qp) {
3015 pr_warn("TERM received tid %u qpid %u\n", tid,
3016 ep->com.qp->wq.sq.qid);
3017 attrs.next_state = C4IW_QP_STATE_TERMINATE;
3018 c4iw_modify_qp(ep->com.dev, ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
3019 &attrs, 1);
3020 } else
3021 pr_warn("TERM received tid %u no ep/qp\n", tid);
3022
3023 CTR2(KTR_IW_CXGBE, "%s:tE %p %d", __func__, ep);
3024
3025 return 0;
3026 }
3027
c4iw_cm_init(void)3028 int __init c4iw_cm_init(void)
3029 {
3030
3031 t4_register_cpl_handler(CPL_RDMA_TERMINATE, terminate);
3032 t4_register_fw_msg_handler(FW6_TYPE_WR_RPL, fw6_wr_rpl);
3033 t4_register_fw_msg_handler(FW6_TYPE_CQE, fw6_cqe_handler);
3034 t4_register_an_handler(c4iw_ev_handler);
3035
3036 TAILQ_INIT(&req_list);
3037 spin_lock_init(&req_lock);
3038 INIT_LIST_HEAD(&err_cqe_list);
3039 spin_lock_init(&err_cqe_lock);
3040
3041 INIT_WORK(&c4iw_task, process_req);
3042
3043 c4iw_taskq = create_singlethread_workqueue("iw_cxgbe");
3044 if (!c4iw_taskq)
3045 return -ENOMEM;
3046
3047 return 0;
3048 }
3049
c4iw_cm_term(void)3050 void __exit c4iw_cm_term(void)
3051 {
3052 WARN_ON(!TAILQ_EMPTY(&req_list));
3053 WARN_ON(!list_empty(&err_cqe_list));
3054 flush_workqueue(c4iw_taskq);
3055 destroy_workqueue(c4iw_taskq);
3056
3057 t4_register_cpl_handler(CPL_RDMA_TERMINATE, NULL);
3058 t4_register_fw_msg_handler(FW6_TYPE_WR_RPL, NULL);
3059 t4_register_fw_msg_handler(FW6_TYPE_CQE, NULL);
3060 t4_register_an_handler(NULL);
3061 }
3062 #endif
3063