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Merge remote-tracking branch 'origin/master'
[unleashed/lotheac.git] / usr / src / uts / common / io / ib / clients / rdsv3 / rdsv3_impl.c
blob3e23ddf5bb8ff38135642dacb25475d69808c8cc
1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
23 */
24 #include <sys/types.h>
25 #include <sys/stream.h>
26 #include <sys/dlpi.h>
27 #include <sys/stropts.h>
28 #include <sys/strsun.h>
29 #include <sys/sysmacros.h>
30 #include <sys/strlog.h>
31 #include <sys/ddi.h>
32 #include <sys/cmn_err.h>
33 #include <sys/socket.h>
34 #include <net/if.h>
35 #include <net/if_types.h>
36 #include <netinet/in.h>
37 #include <sys/ethernet.h>
38 #include <inet/arp.h>
39 #include <inet/ip.h>
40 #include <inet/ip6.h>
41 #include <inet/ip_ire.h>
42 #include <inet/ip_if.h>
43 #include <inet/ip_ftable.h>
44
45 #include <sys/sunddi.h>
46 #include <sys/ksynch.h>
47
48 #include <sys/rds.h>
49 #include <sys/socket.h>
50 #include <sys/socketvar.h>
51 #include <sys/sockio.h>
52 #include <sys/sysmacros.h>
53 #include <inet/common.h>
54 #include <inet/ip.h>
55 #include <net/if_types.h>
56
57 #include <sys/ib/clients/rdsv3/rdsv3.h>
58 #include <sys/ib/clients/rdsv3/rdma.h>
59 #include <sys/ib/clients/rdsv3/ib.h>
60 #include <sys/ib/clients/rdsv3/rdsv3_impl.h>
61 #include <sys/ib/clients/rdsv3/rdsv3_debug.h>
62
63 #include <sys/dls.h>
64 #include <sys/mac.h>
65 #include <sys/mac_client.h>
66 #include <sys/mac_provider.h>
67 #include <sys/mac_client_priv.h>
68
69 ddi_taskq_t *rdsv3_taskq = NULL;
70 extern kmem_cache_t *rdsv3_alloc_cache;
71
72 extern unsigned int ip_ocsum(ushort_t *address, int halfword_count,
73 unsigned int sum);
74
75 /*
76 * Check if the IP interface named by `lifrp' is RDS-capable.
77 */
78 boolean_t
79 rdsv3_capable_interface(struct lifreq *lifrp)
80 {
81 char ifname[LIFNAMSIZ];
82 char drv[MAXLINKNAMELEN];
83 uint_t ppa;
84 char *cp;
85
86 RDSV3_DPRINTF4("rdsv3_capable_interface", "Enter");
87
88 if (lifrp->lifr_type == IFT_IB)
89 return (B_TRUE);
90
91 /*
92 * Strip off the logical interface portion before getting
93 * intimate with the name.
94 */
95 (void) strlcpy(ifname, lifrp->lifr_name, LIFNAMSIZ);
96 if ((cp = strchr(ifname, ':')) != NULL)
97 *cp = '\0';
98
99 if (strcmp("lo0", ifname) == 0) {
100 /*
101 * loopback is considered RDS-capable
102 */
103 return (B_TRUE);
104 }
105
106 return (ddi_parse(ifname, drv, &ppa) == DDI_SUCCESS &&
107 rdsv3_if_lookup_by_name(drv));
108 }
109
110 int
111 rdsv3_do_ip_ioctl(ksocket_t so4, void **ipaddrs, int *size, int *nifs)
112 {
113 struct lifnum lifn;
114 struct lifconf lifc;
115 struct lifreq *lp, *rlp, lifr;
116 int rval = 0;
117 int numifs;
118 int bufsize, rbufsize;
119 void *buf, *rbuf;
120 int i, j, n, rc;
121
122 *ipaddrs = NULL;
123 *size = 0;
124 *nifs = 0;
125
126 RDSV3_DPRINTF4("rdsv3_do_ip_ioctl", "Enter");
127
128 retry_count:
129 /* snapshot the current number of interfaces */
130 lifn.lifn_family = PF_UNSPEC;
131 lifn.lifn_flags = LIFC_NOXMIT | LIFC_TEMPORARY | LIFC_ALLZONES;
132 lifn.lifn_count = 0;
133 rval = ksocket_ioctl(so4, SIOCGLIFNUM, (intptr_t)&lifn, &rval,
134 CRED());
135 if (rval != 0) {
136 RDSV3_DPRINTF2("rdsv3_do_ip_ioctl",
137 "ksocket_ioctl returned: %d", rval);
138 return (rval);
139 }
140
141 numifs = lifn.lifn_count;
142 if (numifs <= 0) {
143 RDSV3_DPRINTF2("rdsv3_do_ip_ioctl", "No interfaces found");
144 return (0);
145 }
146
147 /* allocate extra room in case more interfaces appear */
148 numifs += 10;
149
150 /* get the interface names and ip addresses */
151 bufsize = numifs * sizeof (struct lifreq);
152 buf = kmem_alloc(bufsize, KM_SLEEP);
153
154 lifc.lifc_family = AF_UNSPEC;
155 lifc.lifc_flags = LIFC_NOXMIT | LIFC_TEMPORARY | LIFC_ALLZONES;
156 lifc.lifc_len = bufsize;
157 lifc.lifc_buf = buf;
158 rc = ksocket_ioctl(so4, SIOCGLIFCONF, (intptr_t)&lifc, &rval, CRED());
159 if (rc != 0) {
160 RDSV3_DPRINTF2("rdsv3_do_ip_ioctl", "SIOCGLIFCONF failed");
161 kmem_free(buf, bufsize);
162 return (rc);
163 }
164 /* if our extra room is used up, try again */
165 if (bufsize <= lifc.lifc_len) {
166 kmem_free(buf, bufsize);
167 buf = NULL;
168 goto retry_count;
169 }
170 /* calc actual number of ifconfs */
171 n = lifc.lifc_len / sizeof (struct lifreq);
172
173 /*
174 * Count the RDS interfaces
175 */
176 for (i = 0, j = 0, lp = lifc.lifc_req; i < n; i++, lp++) {
177
178 /*
179 * Copy as the SIOCGLIFFLAGS ioctl is destructive
180 */
181 bcopy(lp, &lifr, sizeof (struct lifreq));
182 /*
183 * fetch the flags using the socket of the correct family
184 */
185 switch (lifr.lifr_addr.ss_family) {
186 case AF_INET:
187 rc = ksocket_ioctl(so4, SIOCGLIFFLAGS, (intptr_t)&lifr,
188 &rval, CRED());
189 break;
190 default:
191 continue;
192 }
193
194 if (rc != 0) continue;
195
196 /*
197 * If we got the flags, skip uninteresting
198 * interfaces based on flags
199 */
200 if ((lifr.lifr_flags & IFF_UP) != IFF_UP)
201 continue;
202 if (lifr.lifr_flags &
203 (IFF_ANYCAST|IFF_NOLOCAL|IFF_DEPRECATED))
204 continue;
205 if (!rdsv3_capable_interface(&lifr))
206 continue;
207 j++;
208 }
209
210 if (j <= 0) {
211 RDSV3_DPRINTF2("rdsv3_do_ip_ioctl", "No RDS interfaces");
212 kmem_free(buf, bufsize);
213 return (rval);
214 }
215
216 numifs = j;
217
218 /* This is the buffer we pass back */
219 rbufsize = numifs * sizeof (struct lifreq);
220 rbuf = kmem_alloc(rbufsize, KM_SLEEP);
221 rlp = (struct lifreq *)rbuf;
222
223 /*
224 * Examine the array of interfaces and filter uninteresting ones
225 */
226 for (i = 0, lp = lifc.lifc_req; i < n; i++, lp++) {
227
228 /*
229 * Copy the address as the SIOCGLIFFLAGS ioctl is destructive
230 */
231 bcopy(lp, &lifr, sizeof (struct lifreq));
232 /*
233 * fetch the flags using the socket of the correct family
234 */
235 switch (lifr.lifr_addr.ss_family) {
236 case AF_INET:
237 rc = ksocket_ioctl(so4, SIOCGLIFFLAGS, (intptr_t)&lifr,
238 &rval, CRED());
239 break;
240 default:
241 continue;
242 }
243
244
245 if (rc != 0) {
246 RDSV3_DPRINTF2("rdsv3_do_ip_ioctl",
247 "ksocket_ioctl failed" " for %s", lifr.lifr_name);
248 continue;
249 }
250
251 /*
252 * If we got the flags, skip uninteresting
253 * interfaces based on flags
254 */
255 if ((lifr.lifr_flags & IFF_UP) != IFF_UP)
256 continue;
257 if (lifr.lifr_flags &
258 (IFF_ANYCAST|IFF_NOLOCAL|IFF_DEPRECATED))
259 continue;
260 if (!rdsv3_capable_interface(&lifr))
261 continue;
262
263 /* save the record */
264 bcopy(lp, rlp, sizeof (struct lifreq));
265 rlp->lifr_addr.ss_family = AF_INET_OFFLOAD;
266 rlp++;
267 }
268
269 kmem_free(buf, bufsize);
270
271 *ipaddrs = rbuf;
272 *size = rbufsize;
273 *nifs = numifs;
274
275 RDSV3_DPRINTF4("rdsv3_do_ip_ioctl", "Return");
276
277 return (rval);
278 }
279
280 /*
281 * Check if the IP interface named by `ifrp' is RDS-capable.
282 */
283 boolean_t
284 rdsv3_capable_interface_old(struct ifreq *ifrp)
285 {
286 char ifname[IFNAMSIZ];
287 char drv[MAXLINKNAMELEN];
288 uint_t ppa;
289 char *cp;
290
291 RDSV3_DPRINTF4("rdsv3_capable_interface_old", "Enter");
292
293 /*
294 * Strip off the logical interface portion before getting
295 * intimate with the name.
296 */
297 (void) strlcpy(ifname, ifrp->ifr_name, IFNAMSIZ);
298 if ((cp = strchr(ifname, ':')) != NULL)
299 *cp = '\0';
300
301 RDSV3_DPRINTF4("rdsv3_capable_interface_old", "ifname: %s", ifname);
302
303 if ((strcmp("lo0", ifname) == 0) ||
304 (strncmp("ibd", ifname, 3) == 0)) {
305 /*
306 * loopback and IB are considered RDS-capable
307 */
308 return (B_TRUE);
309 }
310
311 return (ddi_parse(ifname, drv, &ppa) == DDI_SUCCESS &&
312 rdsv3_if_lookup_by_name(drv));
313 }
314
315 int
316 rdsv3_do_ip_ioctl_old(ksocket_t so4, void **ipaddrs, int *size, int *nifs)
317 {
318 uint_t ifn;
319 struct ifconf ifc;
320 struct ifreq *lp, *rlp, ifr;
321 int rval = 0;
322 int numifs;
323 int bufsize, rbufsize;
324 void *buf, *rbuf;
325 int i, j, n, rc;
326
327 *ipaddrs = NULL;
328 *size = 0;
329 *nifs = 0;
330
331 RDSV3_DPRINTF4("rdsv3_do_ip_ioctl_old", "Enter");
332
333 retry_count:
334 rval = ksocket_ioctl(so4, SIOCGIFNUM, (intptr_t)&ifn, &rval,
335 CRED());
336 if (rval != 0) {
337 RDSV3_DPRINTF2("rdsv3_do_ip_ioctl_old",
338 "ksocket_ioctl(SIOCGIFNUM) returned: %d", rval);
339 return (rval);
340 }
341
342 numifs = ifn;
343 if (numifs <= 0) {
344 RDSV3_DPRINTF2("rdsv3_do_ip_ioctl_old", "No interfaces found");
345 return (0);
346 }
347
348 /* allocate extra room in case more interfaces appear */
349 numifs += 10;
350
351 /* get the interface names and ip addresses */
352 bufsize = numifs * sizeof (struct ifreq);
353 buf = kmem_alloc(bufsize, KM_SLEEP);
354
355 ifc.ifc_len = bufsize;
356 ifc.ifc_buf = buf;
357 rc = ksocket_ioctl(so4, SIOCGIFCONF, (intptr_t)&ifc, &rval, CRED());
358 if (rc != 0) {
359 RDSV3_DPRINTF2("rdsv3_do_ip_ioctl_old",
360 "SIOCGLIFCONF failed: %d", rc);
361 kmem_free(buf, bufsize);
362 return (rc);
363 }
364 /* if our extra room is used up, try again */
365 if (bufsize <= ifc.ifc_len) {
366 kmem_free(buf, bufsize);
367 buf = NULL;
368 goto retry_count;
369 }
370 /* calc actual number of ifconfs */
371 n = ifc.ifc_len / sizeof (struct ifreq);
372
373 /*
374 * Count the RDS interfaces
375 */
376 for (i = 0, j = 0, lp = ifc.ifc_req; i < n; i++, lp++) {
377
378 /*
379 * Copy as the SIOCGIFFLAGS ioctl is destructive
380 */
381 bcopy(lp, &ifr, sizeof (struct ifreq));
382 /*
383 * fetch the flags using the socket of the correct family
384 */
385 switch (ifr.ifr_addr.sa_family) {
386 case AF_INET:
387 rc = ksocket_ioctl(so4, SIOCGIFFLAGS, (intptr_t)&ifr,
388 &rval, CRED());
389 break;
390 default:
391 continue;
392 }
393
394 if (rc != 0) continue;
395
396 RDSV3_DPRINTF2("rdsv3_do_ip_ioctl_old",
397 "1. ifr_name: %s, flags: %d", ifr.ifr_name,
398 (ushort_t)ifr.ifr_flags);
399
400 /*
401 * If we got the flags, skip uninteresting
402 * interfaces based on flags
403 */
404 if ((((ushort_t)ifr.ifr_flags) & IFF_UP) != IFF_UP)
405 continue;
406 RDSV3_DPRINTF2("rdsv3_do_ip_ioctl_old",
407 "2. ifr_name: %s, flags: %d", ifr.ifr_name,
408 (ushort_t)ifr.ifr_flags);
409 if (((ushort_t)ifr.ifr_flags) &
410 (IFF_ANYCAST|IFF_NOLOCAL|IFF_DEPRECATED))
411 continue;
412 RDSV3_DPRINTF2("rdsv3_do_ip_ioctl_old",
413 "3. ifr_name: %s, flags: %d", ifr.ifr_name,
414 (ushort_t)ifr.ifr_flags);
415 if (!rdsv3_capable_interface_old(&ifr))
416 continue;
417 RDSV3_DPRINTF2("rdsv3_do_ip_ioctl_old",
418 "4. ifr_name: %s, flags: %d", ifr.ifr_name,
419 (ushort_t)ifr.ifr_flags);
420 j++;
421 }
422
423 if (j <= 0) {
424 RDSV3_DPRINTF2("rdsv3_do_ip_ioctl_old", "No RDS interfaces");
425 kmem_free(buf, bufsize);
426 return (rval);
427 }
428
429 numifs = j;
430
431 /* This is the buffer we pass back */
432 rbufsize = numifs * sizeof (struct ifreq);
433 rbuf = kmem_alloc(rbufsize, KM_SLEEP);
434 rlp = (struct ifreq *)rbuf;
435
436 /*
437 * Examine the array of interfaces and filter uninteresting ones
438 */
439 for (i = 0, lp = ifc.ifc_req; i < n; i++, lp++) {
440
441 /*
442 * Copy the address as the SIOCGIFFLAGS ioctl is destructive
443 */
444 bcopy(lp, &ifr, sizeof (struct ifreq));
445 /*
446 * fetch the flags using the socket of the correct family
447 */
448 switch (ifr.ifr_addr.sa_family) {
449 case AF_INET:
450 rc = ksocket_ioctl(so4, SIOCGIFFLAGS, (intptr_t)&ifr,
451 &rval, CRED());
452 break;
453 default:
454 continue;
455 }
456
457
458 if (rc != 0) {
459 RDSV3_DPRINTF2("rdsv3_do_ip_ioctl_old",
460 "ksocket_ioctl failed: %d for %s",
461 rc, ifr.ifr_name);
462 continue;
463 }
464
465 /*
466 * If we got the flags, skip uninteresting
467 * interfaces based on flags
468 */
469 if ((((ushort_t)ifr.ifr_flags) & IFF_UP) != IFF_UP)
470 continue;
471 if (((ushort_t)ifr.ifr_flags) &
472 (IFF_ANYCAST|IFF_NOLOCAL|IFF_DEPRECATED))
473 continue;
474 if (!rdsv3_capable_interface_old(&ifr))
475 continue;
476
477 /* save the record */
478 bcopy(lp, rlp, sizeof (struct ifreq));
479 rlp->ifr_addr.sa_family = AF_INET_OFFLOAD;
480 rlp++;
481 }
482
483 kmem_free(buf, bufsize);
484
485 *ipaddrs = rbuf;
486 *size = rbufsize;
487 *nifs = numifs;
488
489 RDSV3_DPRINTF4("rdsv3_do_ip_ioctl_old", "Return");
490
491 return (rval);
492 }
493
494 boolean_t
495 rdsv3_isloopback(ipaddr_t addr)
496 {
497 ip_stack_t *ipst;
498
499 ipst = netstack_find_by_zoneid(GLOBAL_ZONEID)->netstack_ip;
500 ASSERT(ipst != NULL);
501 if (ip_type_v4(addr, ipst) != IRE_LOOPBACK) {
502 netstack_rele(ipst->ips_netstack);
503 return (B_FALSE);
504 }
505 netstack_rele(ipst->ips_netstack);
506 return (B_TRUE);
507 }
508
509 /*
510 * Work Queue Implementation
511 */
512
513 #define RDSV3_WQ_THREAD_IDLE 0
514 #define RDSV3_WQ_THREAD_RUNNING 1
515 #define RDSV3_WQ_THREAD_FLUSHING 2
516 #define RDSV3_WQ_THREAD_EXITING 3
517
518 /* worker thread */
519 void
520 rdsv3_worker_thread(void *arg)
521 {
522 rdsv3_workqueue_struct_t *wq = arg;
523 rdsv3_work_t *work;
524
525 RDSV3_DPRINTF4("rdsv3_worker_thread", "Enter(wq: 0x%p)", wq);
526
527 mutex_enter(&wq->wq_lock);
528 work = list_remove_head(&wq->wq_queue);
529 while (work) {
530 mutex_exit(&wq->wq_lock);
531
532 /* process work */
533 work->func(work);
534
535 mutex_enter(&wq->wq_lock);
536 work = list_remove_head(&wq->wq_queue);
537 }
538
539 /* No more work, go home, until called again */
540 if (wq->wq_state != RDSV3_WQ_THREAD_EXITING) {
541 wq->wq_state = RDSV3_WQ_THREAD_IDLE;
542 }
543 mutex_exit(&wq->wq_lock);
544
545 RDSV3_DPRINTF4("rdsv3_worker_thread", "Return(wq: 0x%p)", wq);
546 }
547
548 /* XXX */
549 void
550 rdsv3_flush_workqueue(rdsv3_workqueue_struct_t *wq)
551 {
552 RDSV3_DPRINTF4("rdsv3_flush_workqueue", "Enter(wq: %p)", wq);
553
554 mutex_enter(&wq->wq_lock);
555 switch (wq->wq_state) {
556 case RDSV3_WQ_THREAD_IDLE:
557 /* nothing to do */
558 ASSERT(list_is_empty(&wq->wq_queue));
559 break;
560
561 case RDSV3_WQ_THREAD_RUNNING:
562 wq->wq_state = RDSV3_WQ_THREAD_FLUSHING;
563 /* FALLTHRU */
564 case RDSV3_WQ_THREAD_FLUSHING:
565 /* already flushing, wait until the flushing is complete */
566 do {
567 mutex_exit(&wq->wq_lock);
568 ddi_sleep(1);
569 mutex_enter(&wq->wq_lock);
570 } while (wq->wq_state == RDSV3_WQ_THREAD_FLUSHING);
571 break;
572 case RDSV3_WQ_THREAD_EXITING:
573 mutex_exit(&wq->wq_lock);
574 rdsv3_worker_thread(wq);
575 return;
576 }
577 mutex_exit(&wq->wq_lock);
578
579 RDSV3_DPRINTF4("rdsv3_flush_workqueue", "Return(wq: %p)", wq);
580 }
581
582 void
583 rdsv3_queue_work(rdsv3_workqueue_struct_t *wq, rdsv3_work_t *wp)
584 {
585 RDSV3_DPRINTF4("rdsv3_queue_work", "Enter(wq: %p, wp: %p)", wq, wp);
586
587 mutex_enter(&wq->wq_lock);
588
589 if (list_link_active(&wp->work_item)) {
590 /* This is already in the queue, ignore this call */
591 mutex_exit(&wq->wq_lock);
592 RDSV3_DPRINTF3("rdsv3_queue_work", "already queued: %p", wp);
593 return;
594 }
595
596 switch (wq->wq_state) {
597 case RDSV3_WQ_THREAD_RUNNING:
598 list_insert_tail(&wq->wq_queue, wp);
599 mutex_exit(&wq->wq_lock);
600 break;
601
602 case RDSV3_WQ_THREAD_FLUSHING:
603 do {
604 mutex_exit(&wq->wq_lock);
605 ddi_sleep(1);
606 mutex_enter(&wq->wq_lock);
607 } while (wq->wq_state == RDSV3_WQ_THREAD_FLUSHING);
608
609 if (wq->wq_state == RDSV3_WQ_THREAD_RUNNING) {
610 list_insert_tail(&wq->wq_queue, wp);
611 mutex_exit(&wq->wq_lock);
612 break;
613 }
614 /* FALLTHRU */
615
616 case RDSV3_WQ_THREAD_IDLE:
617 list_insert_tail(&wq->wq_queue, wp);
618 wq->wq_state = RDSV3_WQ_THREAD_RUNNING;
619 mutex_exit(&wq->wq_lock);
620
621 (void) ddi_taskq_dispatch(rdsv3_taskq, rdsv3_worker_thread, wq,
622 DDI_SLEEP);
623 break;
624
625 case RDSV3_WQ_THREAD_EXITING:
626 mutex_exit(&wq->wq_lock);
627 break;
628 }
629
630 RDSV3_DPRINTF4("rdsv3_queue_work", "Return(wq: %p, wp: %p)", wq, wp);
631 }
632
633 /* timeout handler for delayed work queuing */
634 void
635 rdsv3_work_timeout_handler(void *arg)
636 {
637 rdsv3_delayed_work_t *dwp = (rdsv3_delayed_work_t *)arg;
638
639 RDSV3_DPRINTF4("rdsv3_work_timeout_handler",
640 "Enter(wq: %p, wp: %p)", dwp->wq, &dwp->work);
641
642 mutex_enter(&dwp->lock);
643 dwp->timeid = 0;
644 mutex_exit(&dwp->lock);
645
646 mutex_enter(&dwp->wq->wq_lock);
647 dwp->wq->wq_pending--;
648 if (dwp->wq->wq_state == RDSV3_WQ_THREAD_EXITING) {
649 mutex_exit(&dwp->wq->wq_lock);
650 return;
651 }
652 mutex_exit(&dwp->wq->wq_lock);
653
654 rdsv3_queue_work(dwp->wq, &dwp->work);
655
656 RDSV3_DPRINTF4("rdsv3_work_timeout_handler",
657 "Return(wq: %p, wp: %p)", dwp->wq, &dwp->work);
658 }
659
660 void
661 rdsv3_queue_delayed_work(rdsv3_workqueue_struct_t *wq,
662 rdsv3_delayed_work_t *dwp, uint_t delay)
663 {
664 RDSV3_DPRINTF4("rdsv3_queue_delayed_work",
665 "Enter(wq: %p, wp: %p)", wq, dwp);
666
667 if (delay == 0) {
668 rdsv3_queue_work(wq, &dwp->work);
669 return;
670 }
671
672 mutex_enter(&wq->wq_lock);
673 if (wq->wq_state == RDSV3_WQ_THREAD_EXITING) {
674 mutex_exit(&wq->wq_lock);
675 RDSV3_DPRINTF4("rdsv3_queue_delayed_work",
676 "WQ exiting - don't queue (wq: %p, wp: %p)", wq, dwp);
677 return;
678 }
679 wq->wq_pending++;
680 mutex_exit(&wq->wq_lock);
681
682 mutex_enter(&dwp->lock);
683 if (dwp->timeid == 0) {
684 dwp->wq = wq;
685 dwp->timeid = timeout(rdsv3_work_timeout_handler, dwp,
686 jiffies + (delay * rdsv3_one_sec_in_hz));
687 mutex_exit(&dwp->lock);
688 } else {
689 mutex_exit(&dwp->lock);
690 RDSV3_DPRINTF4("rdsv3_queue_delayed_work", "Already queued: %p",
691 dwp);
692 mutex_enter(&wq->wq_lock);
693 wq->wq_pending--;
694 mutex_exit(&wq->wq_lock);
695 }
696
697 RDSV3_DPRINTF4("rdsv3_queue_delayed_work",
698 "Return(wq: %p, wp: %p)", wq, dwp);
699 }
700
701 void
702 rdsv3_cancel_delayed_work(rdsv3_delayed_work_t *dwp)
703 {
704 RDSV3_DPRINTF4("rdsv3_cancel_delayed_work",
705 "Enter(wq: %p, dwp: %p)", dwp->wq, dwp);
706
707 mutex_enter(&dwp->lock);
708 if (dwp->timeid != 0) {
709 (void) untimeout(dwp->timeid);
710 dwp->timeid = 0;
711 } else {
712 RDSV3_DPRINTF4("rdsv3_cancel_delayed_work",
713 "Nothing to cancel (wq: %p, dwp: %p)", dwp->wq, dwp);
714 mutex_exit(&dwp->lock);
715 return;
716 }
717 mutex_exit(&dwp->lock);
718
719 mutex_enter(&dwp->wq->wq_lock);
720 dwp->wq->wq_pending--;
721 mutex_exit(&dwp->wq->wq_lock);
722
723 RDSV3_DPRINTF4("rdsv3_cancel_delayed_work",
724 "Return(wq: %p, dwp: %p)", dwp->wq, dwp);
725 }
726
727 void
728 rdsv3_destroy_task_workqueue(rdsv3_workqueue_struct_t *wq)
729 {
730 RDSV3_DPRINTF2("rdsv3_destroy_workqueue", "Enter");
731
732 ASSERT(wq);
733
734 mutex_enter(&wq->wq_lock);
735 wq->wq_state = RDSV3_WQ_THREAD_EXITING;
736
737 while (wq->wq_pending > 0) {
738 mutex_exit(&wq->wq_lock);
739 ddi_sleep(1);
740 mutex_enter(&wq->wq_lock);
741 };
742 mutex_exit(&wq->wq_lock);
743
744 rdsv3_flush_workqueue(wq);
745
746 list_destroy(&wq->wq_queue);
747 mutex_destroy(&wq->wq_lock);
748 kmem_free(wq, sizeof (rdsv3_workqueue_struct_t));
749
750 ASSERT(rdsv3_taskq);
751 ddi_taskq_destroy(rdsv3_taskq);
752
753 wq = NULL;
754 rdsv3_taskq = NULL;
755
756 RDSV3_DPRINTF2("rdsv3_destroy_workqueue", "Return");
757 }
758
759 /* ARGSUSED */
760 void
761 rdsv3_rdma_init_worker(struct rdsv3_work_s *work)
762 {
763 rdsv3_rdma_init();
764 }
765
766 #define RDSV3_NUM_TASKQ_THREADS 1
767 rdsv3_workqueue_struct_t *
768 rdsv3_create_task_workqueue(char *name)
769 {
770 rdsv3_workqueue_struct_t *wq;
771
772 RDSV3_DPRINTF2("create_singlethread_workqueue", "Enter (dip: %p)",
773 rdsv3_dev_info);
774
775 rdsv3_taskq = ddi_taskq_create(rdsv3_dev_info, name,
776 RDSV3_NUM_TASKQ_THREADS, TASKQ_DEFAULTPRI, 0);
777 if (rdsv3_taskq == NULL) {
778 RDSV3_DPRINTF2(__FILE__,
779 "ddi_taskq_create failed for rdsv3_taskq");
780 return (NULL);
781 }
782
783 wq = kmem_zalloc(sizeof (rdsv3_workqueue_struct_t), KM_NOSLEEP);
784 if (wq == NULL) {
785 RDSV3_DPRINTF2(__FILE__, "kmem_zalloc failed for wq");
786 ddi_taskq_destroy(rdsv3_taskq);
787 return (NULL);
788 }
789
790 list_create(&wq->wq_queue, sizeof (struct rdsv3_work_s),
791 offsetof(struct rdsv3_work_s, work_item));
792 mutex_init(&wq->wq_lock, NULL, MUTEX_DRIVER, NULL);
793 wq->wq_state = RDSV3_WQ_THREAD_IDLE;
794 wq->wq_pending = 0;
795 rdsv3_one_sec_in_hz = drv_usectohz(1000000);
796
797 RDSV3_DPRINTF2("create_singlethread_workqueue", "Return");
798
799 return (wq);
800 }
801
802 /*
803 * Implementation for struct sock
804 */
805
806 void
807 rdsv3_sock_exit_data(struct rsock *sk)
808 {
809 struct rdsv3_sock *rs = sk->sk_protinfo;
810
811 RDSV3_DPRINTF4("rdsv3_sock_exit_data", "rs: %p sk: %p", rs, sk);
812
813 ASSERT(rs != NULL);
814 ASSERT(rdsv3_sk_sock_flag(sk, SOCK_DEAD));
815
816 rs->rs_sk = NULL;
817
818 list_destroy(&rs->rs_send_queue);
819 list_destroy(&rs->rs_notify_queue);
820 list_destroy(&rs->rs_recv_queue);
821
822 rw_destroy(&rs->rs_recv_lock);
823 mutex_destroy(&rs->rs_lock);
824
825 mutex_destroy(&rs->rs_rdma_lock);
826 avl_destroy(&rs->rs_rdma_keys);
827
828 mutex_destroy(&rs->rs_conn_lock);
829 mutex_destroy(&rs->rs_congested_lock);
830 cv_destroy(&rs->rs_congested_cv);
831
832 rdsv3_exit_waitqueue(sk->sk_sleep);
833 kmem_free(sk->sk_sleep, sizeof (rdsv3_wait_queue_t));
834 mutex_destroy(&sk->sk_lock);
835
836 kmem_cache_free(rdsv3_alloc_cache, sk);
837 RDSV3_DPRINTF4("rdsv3_sock_exit_data", "rs: %p sk: %p", rs, sk);
838 }
839
840 /* XXX - figure out right values */
841 #define RDSV3_RECV_HIWATER (256 * 1024)
842 #define RDSV3_RECV_LOWATER 128
843 #define RDSV3_XMIT_HIWATER (256 * 1024)
844 #define RDSV3_XMIT_LOWATER 1024
845
846 struct rsock *
847 rdsv3_sk_alloc()
848 {
849 struct rsock *sk;
850
851 sk = kmem_cache_alloc(rdsv3_alloc_cache, KM_SLEEP);
852 if (sk == NULL) {
853 RDSV3_DPRINTF2("rdsv3_create", "kmem_cache_alloc failed");
854 return (NULL);
855 }
856
857 bzero(sk, sizeof (struct rsock) + sizeof (struct rdsv3_sock));
858 return (sk);
859 }
860
861 void
862 rdsv3_sock_init_data(struct rsock *sk)
863 {
864 sk->sk_sleep = kmem_zalloc(sizeof (rdsv3_wait_queue_t), KM_SLEEP);
865 rdsv3_init_waitqueue(sk->sk_sleep);
866
867 mutex_init(&sk->sk_lock, NULL, MUTEX_DRIVER, NULL);
868 sk->sk_refcount = 1;
869 sk->sk_protinfo = (struct rdsv3_sock *)(sk + 1);
870 sk->sk_sndbuf = RDSV3_XMIT_HIWATER;
871 sk->sk_rcvbuf = RDSV3_RECV_HIWATER;
872 }
873
874 /*
875 * Connection cache
876 */
877 /* ARGSUSED */
878 int
879 rdsv3_conn_constructor(void *buf, void *arg, int kmflags)
880 {
881 struct rdsv3_connection *conn = buf;
882
883 bzero(conn, sizeof (struct rdsv3_connection));
884
885 conn->c_next_tx_seq = 1;
886 mutex_init(&conn->c_lock, NULL, MUTEX_DRIVER, NULL);
887 mutex_init(&conn->c_send_lock, NULL, MUTEX_DRIVER, NULL);
888 conn->c_send_generation = 1;
889 conn->c_senders = 0;
890
891 list_create(&conn->c_send_queue, sizeof (struct rdsv3_message),
892 offsetof(struct rdsv3_message, m_conn_item));
893 list_create(&conn->c_retrans, sizeof (struct rdsv3_message),
894 offsetof(struct rdsv3_message, m_conn_item));
895 return (0);
896 }
897
898 /* ARGSUSED */
899 void
900 rdsv3_conn_destructor(void *buf, void *arg)
901 {
902 struct rdsv3_connection *conn = buf;
903
904 ASSERT(list_is_empty(&conn->c_send_queue));
905 ASSERT(list_is_empty(&conn->c_retrans));
906 list_destroy(&conn->c_send_queue);
907 list_destroy(&conn->c_retrans);
908 mutex_destroy(&conn->c_send_lock);
909 mutex_destroy(&conn->c_lock);
910 }
911
912 int
913 rdsv3_conn_compare(const void *conn1, const void *conn2)
914 {
915 uint32_be_t laddr1, faddr1, laddr2, faddr2;
916
917 laddr1 = ((rdsv3_conn_info_t *)conn1)->c_laddr;
918 laddr2 = ((struct rdsv3_connection *)conn2)->c_laddr;
919
920 if (laddr1 == laddr2) {
921 faddr1 = ((rdsv3_conn_info_t *)conn1)->c_faddr;
922 faddr2 = ((struct rdsv3_connection *)conn2)->c_faddr;
923 if (faddr1 == faddr2)
924 return (0);
925 if (faddr1 < faddr2)
926 return (-1);
927 return (1);
928 }
929
930 if (laddr1 < laddr2)
931 return (-1);
932
933 return (1);
934 }
935
936 /* rdsv3_ib_incoming cache */
937 /* ARGSUSED */
938 int
939 rdsv3_ib_inc_constructor(void *buf, void *arg, int kmflags)
940 {
941 list_create(&((struct rdsv3_ib_incoming *)buf)->ii_frags,
942 sizeof (struct rdsv3_page_frag),
943 offsetof(struct rdsv3_page_frag, f_item));
944
945 return (0);
946 }
947
948 /* ARGSUSED */
949 void
950 rdsv3_ib_inc_destructor(void *buf, void *arg)
951 {
952 list_destroy(&((struct rdsv3_ib_incoming *)buf)->ii_frags);
953 }
954
955 /* ib_frag_slab cache */
956 /* ARGSUSED */
957 int
958 rdsv3_ib_frag_constructor(void *buf, void *arg, int kmflags)
959 {
960 struct rdsv3_page_frag *frag = (struct rdsv3_page_frag *)buf;
961 struct rdsv3_ib_device *rds_ibdev = (struct rdsv3_ib_device *)arg;
962 ibt_iov_attr_t iov_attr;
963 ibt_iov_t iov_arr[1];
964 ibt_all_wr_t wr;
965
966 bzero(frag, sizeof (struct rdsv3_page_frag));
967 list_link_init(&frag->f_item);
968
969 frag->f_page = kmem_alloc(PAGE_SIZE, kmflags);
970 if (frag->f_page == NULL) {
971 RDSV3_DPRINTF2("rdsv3_ib_frag_constructor",
972 "kmem_alloc for %d failed", PAGE_SIZE);
973 return (-1);
974 }
975 frag->f_offset = 0;
976
977 iov_attr.iov_as = NULL;
978 iov_attr.iov = &iov_arr[0];
979 iov_attr.iov_buf = NULL;
980 iov_attr.iov_list_len = 1;
981 iov_attr.iov_wr_nds = 1;
982 iov_attr.iov_lso_hdr_sz = 0;
983 iov_attr.iov_flags = IBT_IOV_SLEEP | IBT_IOV_RECV;
984
985 iov_arr[0].iov_addr = frag->f_page;
986 iov_arr[0].iov_len = PAGE_SIZE;
987
988 wr.recv.wr_nds = 1;
989 wr.recv.wr_sgl = &frag->f_sge;
990
991 if (ibt_map_mem_iov(ib_get_ibt_hca_hdl(rds_ibdev->dev),
992 &iov_attr, &wr, &frag->f_mapped) != IBT_SUCCESS) {
993 RDSV3_DPRINTF2("rdsv3_ib_frag_constructor",
994 "ibt_map_mem_iov failed");
995 kmem_free(frag->f_page, PAGE_SIZE);
996 return (-1);
997 }
998
999 return (0);
1000 }
1001
1002 /* ARGSUSED */
1003 void
1004 rdsv3_ib_frag_destructor(void *buf, void *arg)
1005 {
1006 struct rdsv3_page_frag *frag = (struct rdsv3_page_frag *)buf;
1007 struct rdsv3_ib_device *rds_ibdev = (struct rdsv3_ib_device *)arg;
1008
1009 /* unmap the page */
1010 if (ibt_unmap_mem_iov(ib_get_ibt_hca_hdl(rds_ibdev->dev),
1011 frag->f_mapped) != IBT_SUCCESS)
1012 RDSV3_DPRINTF2("rdsv3_ib_frag_destructor",
1013 "ibt_unmap_mem_iov failed");
1014
1015 /* free the page */
1016 kmem_free(frag->f_page, PAGE_SIZE);
1017 }
1018
1019 /* loop.c */
1020 extern kmutex_t loop_conns_lock;
1021 extern list_t loop_conns;
1022
1023 struct rdsv3_loop_connection
1024 {
1025 struct list_node loop_node;
1026 struct rdsv3_connection *conn;
1027 };
1028
1029 void
1030 rdsv3_loop_init(void)
1031 {
1032 list_create(&loop_conns, sizeof (struct rdsv3_loop_connection),
1033 offsetof(struct rdsv3_loop_connection, loop_node));
1034 mutex_init(&loop_conns_lock, NULL, MUTEX_DRIVER, NULL);
1035 }
1036
1037 /* rdma.c */
1038 /* IB Rkey is used here for comparison */
1039 int
1040 rdsv3_mr_compare(const void *mr1, const void *mr2)
1041 {
1042 uint32_t key1 = *(uint32_t *)mr1;
1043 uint32_t key2 = ((struct rdsv3_mr *)mr2)->r_key;
1044
1045 if (key1 < key2)
1046 return (-1);
1047 if (key1 > key2)
1048 return (1);
1049 return (0);
1050 }
1051
1052 /* transport.c */
1053 extern struct rdsv3_transport *transports[];
1054 extern krwlock_t trans_sem;
1055
1056 void
1057 rdsv3_trans_exit(void)
1058 {
1059 struct rdsv3_transport *trans;
1060 int i;
1061
1062 RDSV3_DPRINTF2("rdsv3_trans_exit", "Enter");
1063
1064 /* currently, only IB transport */
1065 rw_enter(&trans_sem, RW_READER);
1066 trans = NULL;
1067 for (i = 0; i < RDS_TRANS_COUNT; i++) {
1068 if (transports[i]) {
1069 trans = transports[i];
1070 break;
1071 }
1072 }
1073 rw_exit(&trans_sem);
1074
1075 /* trans->exit() will remove the trans from the list */
1076 if (trans)
1077 trans->exit();
1078
1079 rw_destroy(&trans_sem);
1080
1081 RDSV3_DPRINTF2("rdsv3_trans_exit", "Return");
1082 }
1083
1084 void
1085 rdsv3_trans_init()
1086 {
1087 RDSV3_DPRINTF2("rdsv3_trans_init", "Enter");
1088
1089 rw_init(&trans_sem, NULL, RW_DRIVER, NULL);
1090
1091 RDSV3_DPRINTF2("rdsv3_trans_init", "Return");
1092 }
1093
1094 int
1095 rdsv3_put_cmsg(struct msghdr *msg, int level, int type, size_t size,
1096 void *payload)
1097 {
1098 struct cmsghdr *cp;
1099 char *bp;
1100 size_t cmlen;
1101 size_t cmspace;
1102 size_t bufsz;
1103
1104 RDSV3_DPRINTF4("rdsv3_put_cmsg",
1105 "Enter(msg: %p level: %d type: %d sz: %d)",
1106 msg, level, type, size);
1107
1108 if (msg == NULL || msg->msg_controllen == 0) {
1109 return (0);
1110 }
1111 /* check for first cmsg or this is another cmsg to be appended */
1112 if (msg->msg_control == NULL)
1113 msg->msg_controllen = 0;
1114
1115 cmlen = CMSG_LEN(size);
1116 cmspace = CMSG_SPACE(size);
1117 bufsz = msg->msg_controllen + cmspace;
1118
1119 /* extend the existing cmsg to append the next cmsg */
1120 bp = kmem_alloc(bufsz, KM_SLEEP);
1121 if (msg->msg_control) {
1122 bcopy(msg->msg_control, bp, msg->msg_controllen);
1123 kmem_free(msg->msg_control, (size_t)msg->msg_controllen);
1124 }
1125
1126 /* assign payload the proper cmsg location */
1127 cp = (struct cmsghdr *)(bp + msg->msg_controllen);
1128 cp->cmsg_len = cmlen;
1129 cp->cmsg_level = level;
1130 cp->cmsg_type = type;
1131
1132 bcopy(payload, CMSG_DATA(cp), cmlen -
1133 (unsigned int)_CMSG_DATA_ALIGN(sizeof (struct cmsghdr)));
1134
1135 msg->msg_control = bp;
1136 msg->msg_controllen = bufsz;
1137
1138 RDSV3_DPRINTF4("rdsv3_put_cmsg", "Return(cmsg_len: %d)", cp->cmsg_len);
1139
1140 return (0);
1141 }
1142
1143 /* ARGSUSED */
1144 int
1145 rdsv3_verify_bind_address(ipaddr_t addr)
1146 {
1147 return (1);
1148 }
1149
1150 /* checksum */
1151 uint16_t
1152 rdsv3_ip_fast_csum(void *hdr, size_t length)
1153 {
1154 return (0xffff &
1155 (uint16_t)(~ip_ocsum((ushort_t *)hdr, (int)length <<1, 0)));
1156 }
1157
1158 /* scatterlist implementation */
1159 /* ARGSUSED */
1160 caddr_t
1161 rdsv3_ib_sg_dma_address(ib_device_t *dev, struct rdsv3_scatterlist *scat,
1162 uint_t offset)
1163 {
1164 return (0);
1165 }
1166
1167 uint_t
1168 rdsv3_ib_dma_map_sg(struct ib_device *dev, struct rdsv3_scatterlist *scat,
1169 uint_t num)
1170 {
1171 struct rdsv3_scatterlist *s, *first;
1172 ibt_iov_t *iov;
1173 ibt_wr_ds_t *sgl;
1174 ibt_iov_attr_t iov_attr;
1175 ibt_send_wr_t swr;
1176 uint_t i;
1177
1178 RDSV3_DPRINTF4("rdsv3_ib_dma_map_sg", "scat %p, num: %d", scat, num);
1179
1180 s = first = &scat[0];
1181 ASSERT(first->mihdl == NULL);
1182
1183 iov = kmem_alloc(num * sizeof (ibt_iov_t), KM_SLEEP);
1184 sgl = kmem_zalloc((num * 2) * sizeof (ibt_wr_ds_t), KM_SLEEP);
1185
1186 for (i = 0; i < num; i++, s++) {
1187 iov[i].iov_addr = s->vaddr;
1188 iov[i].iov_len = s->length;
1189 }
1190
1191 iov_attr.iov_as = NULL;
1192 iov_attr.iov = iov;
1193 iov_attr.iov_buf = NULL;
1194 iov_attr.iov_list_len = num;
1195 iov_attr.iov_wr_nds = num * 2;
1196 iov_attr.iov_lso_hdr_sz = 0;
1197 iov_attr.iov_flags = IBT_IOV_SLEEP;
1198
1199 swr.wr_sgl = sgl;
1200
1201 i = ibt_map_mem_iov(ib_get_ibt_hca_hdl(dev),
1202 &iov_attr, (ibt_all_wr_t *)&swr, &first->mihdl);
1203 kmem_free(iov, num * sizeof (ibt_iov_t));
1204 if (i != IBT_SUCCESS) {
1205 RDSV3_DPRINTF2("rdsv3_ib_dma_map_sg",
1206 "ibt_map_mem_iov returned: %d", i);
1207 return (0);
1208 }
1209
1210 s = first;
1211 for (i = 0; i < num; i++, s++, sgl++) {
1212 s->sgl = sgl;
1213 }
1214
1215 return (num);
1216 }
1217
1218 void
1219 rdsv3_ib_dma_unmap_sg(ib_device_t *dev, struct rdsv3_scatterlist *scat,
1220 uint_t num)
1221 {
1222 /* Zero length messages have no scatter gather entries */
1223 if (num != 0) {
1224 ASSERT(scat->mihdl != NULL);
1225 ASSERT(scat->sgl != NULL);
1226
1227 (void) ibt_unmap_mem_iov(ib_get_ibt_hca_hdl(dev), scat->mihdl);
1228
1229 kmem_free(scat->sgl, (num * 2) * sizeof (ibt_wr_ds_t));
1230 scat->sgl = NULL;
1231 scat->mihdl = NULL;
1232 }
1233 }
1234
1235 int
1236 rdsv3_ib_alloc_hdrs(ib_device_t *dev, struct rdsv3_ib_connection *ic)
1237 {
1238 caddr_t addr;
1239 size_t size;
1240 ibt_mr_attr_t mr_attr;
1241 ibt_mr_desc_t mr_desc;
1242 ibt_mr_hdl_t mr_hdl;
1243 int ret;
1244
1245 RDSV3_DPRINTF4("rdsv3_ib_alloc_hdrs", "Enter(dev: %p)", dev);
1246
1247 ASSERT(ic->i_mr == NULL);
1248
1249 size = (ic->i_send_ring.w_nr + ic->i_recv_ring.w_nr + 1) *
1250 sizeof (struct rdsv3_header);
1251
1252 addr = kmem_zalloc(size, KM_NOSLEEP);
1253 if (addr == NULL)
1254 return (-1);
1255
1256 mr_attr.mr_vaddr = (ib_vaddr_t)(uintptr_t)addr;
1257 mr_attr.mr_len = size;
1258 mr_attr.mr_as = NULL;
1259 mr_attr.mr_flags = IBT_MR_ENABLE_LOCAL_WRITE;
1260 ret = ibt_register_mr(ib_get_ibt_hca_hdl(dev), RDSV3_PD2PDHDL(ic->i_pd),
1261 &mr_attr, &mr_hdl, &mr_desc);
1262 if (ret != IBT_SUCCESS) {
1263 RDSV3_DPRINTF2("rdsv3_ib_alloc_hdrs",
1264 "ibt_register_mr returned: " "%d", ret);
1265 return (-1);
1266 }
1267
1268 ic->i_mr = kmem_alloc(sizeof (struct rdsv3_hdrs_mr), KM_SLEEP);
1269 ic->i_mr->addr = addr;
1270 ic->i_mr->size = size;
1271 ic->i_mr->hdl = mr_hdl;
1272 ic->i_mr->lkey = mr_desc.md_lkey;
1273
1274 ic->i_send_hdrs = (struct rdsv3_header *)addr;
1275 ic->i_send_hdrs_dma = (uint64_t)(uintptr_t)addr;
1276
1277 ic->i_recv_hdrs = (struct rdsv3_header *)(addr +
1278 (ic->i_send_ring.w_nr * sizeof (struct rdsv3_header)));
1279 ic->i_recv_hdrs_dma = (uint64_t)(uintptr_t)(addr +
1280 (ic->i_send_ring.w_nr * sizeof (struct rdsv3_header)));
1281
1282 ic->i_ack = (struct rdsv3_header *)(addr +
1283 ((ic->i_send_ring.w_nr + ic->i_recv_ring.w_nr) *
1284 sizeof (struct rdsv3_header)));
1285 ic->i_ack_dma = (uint64_t)(uintptr_t)(addr +
1286 ((ic->i_send_ring.w_nr + ic->i_recv_ring.w_nr) *
1287 sizeof (struct rdsv3_header)));
1288
1289 RDSV3_DPRINTF4("rdsv3_ib_alloc_hdrs", "Return(dev: %p)", dev);
1290
1291 return (0);
1292 }
1293
1294 void
1295 rdsv3_ib_free_hdrs(ib_device_t *dev, struct rdsv3_ib_connection *ic)
1296 {
1297 RDSV3_DPRINTF4("rdsv3_ib_free_hdrs", "Enter(dev: %p)", dev);
1298 ASSERT(ic->i_mr != NULL);
1299
1300 ic->i_send_hdrs = NULL;
1301 ic->i_send_hdrs_dma = (uintptr_t)NULL;
1302
1303 ic->i_recv_hdrs = NULL;
1304 ic->i_recv_hdrs_dma = (uintptr_t)NULL;
1305
1306 ic->i_ack = NULL;
1307 ic->i_ack_dma = (uintptr_t)NULL;
1308
1309 (void) ibt_deregister_mr(ib_get_ibt_hca_hdl(dev), ic->i_mr->hdl);
1310
1311 kmem_free(ic->i_mr->addr, ic->i_mr->size);
1312 kmem_free(ic->i_mr, sizeof (struct rdsv3_hdrs_mr));
1313
1314 ic->i_mr = NULL;
1315 RDSV3_DPRINTF4("rdsv3_ib_free_hdrs", "Return(dev: %p)", dev);
1316 }
1317
1318 /*
1319 * atomic_add_unless - add unless the number is a given value
1320 * @v: pointer of type atomic_t
1321 * @a: the amount to add to v...
1322 * @u: ...unless v is equal to u.
1323 *
1324 * Atomically adds @a to @v, so long as it was not @u.
1325 * Returns non-zero if @v was not @u, and zero otherwise.
1326 */
1327 int
1328 atomic_add_unless(atomic_t *v, uint_t a, ulong_t u)
1329 {
1330 uint_t c, old;
1331
1332 c = *v;
1333 while (c != u && (old = atomic_cas_uint(v, c, c + a)) != c) {
1334 c = old;
1335 }
1336 return ((ulong_t)c != u);
1337 }