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RDMA/cma: Allow early transition to RTS to handle lost CM messages
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / infiniband / core / cma.c
CommitLineData
e51060f0
SH		 1/*
2 * Copyright (c) 2005 Voltaire Inc. All rights reserved.
3 * Copyright (c) 2002-2005, Network Appliance, Inc. All rights reserved.
4 * Copyright (c) 1999-2005, Mellanox Technologies, Inc. All rights reserved.
5 * Copyright (c) 2005-2006 Intel Corporation. All rights reserved.
6 *
7 * This Software is licensed under one of the following licenses:
8 *
9 * 1) under the terms of the "Common Public License 1.0" a copy of which is
10 * available from the Open Source Initiative, see
11 * http://www.opensource.org/licenses/cpl.php.
12 *
13 * 2) under the terms of the "The BSD License" a copy of which is
14 * available from the Open Source Initiative, see
15 * http://www.opensource.org/licenses/bsd-license.php.
16 *
17 * 3) under the terms of the "GNU General Public License (GPL) Version 2" a
18 * copy of which is available from the Open Source Initiative, see
19 * http://www.opensource.org/licenses/gpl-license.php.
20 *
21 * Licensee has the right to choose one of the above licenses.
22 *
23 * Redistributions of source code must retain the above copyright
24 * notice and one of the license notices.
25 *
26 * Redistributions in binary form must reproduce both the above copyright
27 * notice, one of the license notices in the documentation
28 * and/or other materials provided with the distribution.
29 *
30 */
31
32#include <linux/completion.h>
33#include <linux/in.h>
34#include <linux/in6.h>
35#include <linux/mutex.h>
36#include <linux/random.h>
37#include <linux/idr.h>
07ebafba 38#include <linux/inetdevice.h>
e51060f0
SH		 39
40#include <net/tcp.h>
41
42#include <rdma/rdma_cm.h>
43#include <rdma/rdma_cm_ib.h>
44#include <rdma/ib_cache.h>
45#include <rdma/ib_cm.h>
46#include <rdma/ib_sa.h>
07ebafba 47#include <rdma/iw_cm.h>
e51060f0
SH		 48
49MODULE_AUTHOR("Sean Hefty");
50MODULE_DESCRIPTION("Generic RDMA CM Agent");
51MODULE_LICENSE("Dual BSD/GPL");
52
53#define CMA_CM_RESPONSE_TIMEOUT 20
d5bb7599 54#define CMA_MAX_CM_RETRIES 15
e51060f0
SH		 55
56static void cma_add_one(struct ib_device *device);
57static void cma_remove_one(struct ib_device *device);
58
59static struct ib_client cma_client = {
60 .name = "cma",
61 .add = cma_add_one,
62 .remove = cma_remove_one
63};
64
c1a0b23b 65static struct ib_sa_client sa_client;
7a118df3 66static struct rdma_addr_client addr_client;
e51060f0
SH		 67static LIST_HEAD(dev_list);
68static LIST_HEAD(listen_any_list);
69static DEFINE_MUTEX(lock);
70static struct workqueue_struct *cma_wq;
71static DEFINE_IDR(sdp_ps);
72static DEFINE_IDR(tcp_ps);
73
74struct cma_device {
75 struct list_head list;
76 struct ib_device *device;
77 __be64 node_guid;
78 struct completion comp;
79 atomic_t refcount;
80 struct list_head id_list;
81};
82
83enum cma_state {
84 CMA_IDLE,
85 CMA_ADDR_QUERY,
86 CMA_ADDR_RESOLVED,
87 CMA_ROUTE_QUERY,
88 CMA_ROUTE_RESOLVED,
89 CMA_CONNECT,
90 CMA_DISCONNECT,
91 CMA_ADDR_BOUND,
92 CMA_LISTEN,
93 CMA_DEVICE_REMOVAL,
94 CMA_DESTROYING
95};
96
97struct rdma_bind_list {
98 struct idr *ps;
99 struct hlist_head owners;
100 unsigned short port;
101};
102
103/*
104 * Device removal can occur at anytime, so we need extra handling to
105 * serialize notifying the user of device removal with other callbacks.
106 * We do this by disabling removal notification while a callback is in process,
107 * and reporting it after the callback completes.
108 */
109struct rdma_id_private {
110 struct rdma_cm_id id;
111
112 struct rdma_bind_list *bind_list;
113 struct hlist_node node;
114 struct list_head list;
115 struct list_head listen_list;
116 struct cma_device *cma_dev;
117
118 enum cma_state state;
119 spinlock_t lock;
120 struct completion comp;
121 atomic_t refcount;
122 wait_queue_head_t wait_remove;
123 atomic_t dev_remove;
124
125 int backlog;
126 int timeout_ms;
127 struct ib_sa_query *query;
128 int query_id;
129 union {
130 struct ib_cm_id *ib;
07ebafba 131 struct iw_cm_id *iw;
e51060f0
SH		 132 } cm_id;
133
134 u32 seq_num;
135 u32 qp_num;
e51060f0
SH		 136 u8 srq;
137};
138
139struct cma_work {
140 struct work_struct work;
141 struct rdma_id_private *id;
142 enum cma_state old_state;
143 enum cma_state new_state;
144 struct rdma_cm_event event;
145};
146
147union cma_ip_addr {
148 struct in6_addr ip6;
149 struct {
150 __u32 pad[3];
151 __u32 addr;
152 } ip4;
153};
154
155struct cma_hdr {
156 u8 cma_version;
157 u8 ip_version; /* IP version: 7:4 */
158 __u16 port;
159 union cma_ip_addr src_addr;
160 union cma_ip_addr dst_addr;
161};
162
163struct sdp_hh {
164 u8 bsdh[16];
165 u8 sdp_version; /* Major version: 7:4 */
166 u8 ip_version; /* IP version: 7:4 */
167 u8 sdp_specific1[10];
168 __u16 port;
169 __u16 sdp_specific2;
170 union cma_ip_addr src_addr;
171 union cma_ip_addr dst_addr;
172};
173
174struct sdp_hah {
175 u8 bsdh[16];
176 u8 sdp_version;
177};
178
179#define CMA_VERSION 0x00
180#define SDP_MAJ_VERSION 0x2
181
182static int cma_comp(struct rdma_id_private *id_priv, enum cma_state comp)
183{
184 unsigned long flags;
185 int ret;
186
187 spin_lock_irqsave(&id_priv->lock, flags);
188 ret = (id_priv->state == comp);
189 spin_unlock_irqrestore(&id_priv->lock, flags);
190 return ret;
191}
192
193static int cma_comp_exch(struct rdma_id_private *id_priv,
194 enum cma_state comp, enum cma_state exch)
195{
196 unsigned long flags;
197 int ret;
198
199 spin_lock_irqsave(&id_priv->lock, flags);
200 if ((ret = (id_priv->state == comp)))
201 id_priv->state = exch;
202 spin_unlock_irqrestore(&id_priv->lock, flags);
203 return ret;
204}
205
206static enum cma_state cma_exch(struct rdma_id_private *id_priv,
207 enum cma_state exch)
208{
209 unsigned long flags;
210 enum cma_state old;
211
212 spin_lock_irqsave(&id_priv->lock, flags);
213 old = id_priv->state;
214 id_priv->state = exch;
215 spin_unlock_irqrestore(&id_priv->lock, flags);
216 return old;
217}
218
219static inline u8 cma_get_ip_ver(struct cma_hdr *hdr)
220{
221 return hdr->ip_version >> 4;
222}
223
224static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
225{
226 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
227}
228
229static inline u8 sdp_get_majv(u8 sdp_version)
230{
231 return sdp_version >> 4;
232}
233
234static inline u8 sdp_get_ip_ver(struct sdp_hh *hh)
235{
236 return hh->ip_version >> 4;
237}
238
239static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver)
240{
241 hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF);
242}
243
244static void cma_attach_to_dev(struct rdma_id_private *id_priv,
245 struct cma_device *cma_dev)
246{
247 atomic_inc(&cma_dev->refcount);
248 id_priv->cma_dev = cma_dev;
249 id_priv->id.device = cma_dev->device;
250 list_add_tail(&id_priv->list, &cma_dev->id_list);
251}
252
253static inline void cma_deref_dev(struct cma_device *cma_dev)
254{
255 if (atomic_dec_and_test(&cma_dev->refcount))
256 complete(&cma_dev->comp);
257}
258
259static void cma_detach_from_dev(struct rdma_id_private *id_priv)
260{
261 list_del(&id_priv->list);
262 cma_deref_dev(id_priv->cma_dev);
263 id_priv->cma_dev = NULL;
264}
265
07ebafba 266static int cma_acquire_dev(struct rdma_id_private *id_priv)
e51060f0 267{
07ebafba 268 enum rdma_node_type dev_type = id_priv->id.route.addr.dev_addr.dev_type;
e51060f0 269 struct cma_device *cma_dev;
f0ee3404 270 union ib_gid gid;
e51060f0
SH		 271 int ret = -ENODEV;
272
07ebafba
TT		 273 switch (rdma_node_get_transport(dev_type)) {
274 case RDMA_TRANSPORT_IB:
275 ib_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
276 break;
277 case RDMA_TRANSPORT_IWARP:
278 iw_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
279 break;
280 default:
281 return -ENODEV;
282 }
61a73c70 283
e51060f0 284 list_for_each_entry(cma_dev, &dev_list, list) {
f0ee3404 285 ret = ib_find_cached_gid(cma_dev->device, &gid,
e51060f0
SH		 286 &id_priv->id.port_num, NULL);
287 if (!ret) {
288 cma_attach_to_dev(id_priv, cma_dev);
289 break;
290 }
291 }
e51060f0
SH		 292 return ret;
293}
294
e51060f0
SH		 295static void cma_deref_id(struct rdma_id_private *id_priv)
296{
297 if (atomic_dec_and_test(&id_priv->refcount))
298 complete(&id_priv->comp);
299}
300
301static void cma_release_remove(struct rdma_id_private *id_priv)
302{
303 if (atomic_dec_and_test(&id_priv->dev_remove))
304 wake_up(&id_priv->wait_remove);
305}
306
307struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
308 void *context, enum rdma_port_space ps)
309{
310 struct rdma_id_private *id_priv;
311
312 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
313 if (!id_priv)
314 return ERR_PTR(-ENOMEM);
315
316 id_priv->state = CMA_IDLE;
317 id_priv->id.context = context;
318 id_priv->id.event_handler = event_handler;
319 id_priv->id.ps = ps;
320 spin_lock_init(&id_priv->lock);
321 init_completion(&id_priv->comp);
322 atomic_set(&id_priv->refcount, 1);
323 init_waitqueue_head(&id_priv->wait_remove);
324 atomic_set(&id_priv->dev_remove, 0);
325 INIT_LIST_HEAD(&id_priv->listen_list);
326 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
327
328 return &id_priv->id;
329}
330EXPORT_SYMBOL(rdma_create_id);
331
332static int cma_init_ib_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
333{
334 struct ib_qp_attr qp_attr;
335 struct rdma_dev_addr *dev_addr;
336 int ret;
337
338 dev_addr = &id_priv->id.route.addr.dev_addr;
339 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
340 ib_addr_get_pkey(dev_addr),
341 &qp_attr.pkey_index);
342 if (ret)
343 return ret;
344
345 qp_attr.qp_state = IB_QPS_INIT;
e31353ea 346 qp_attr.qp_access_flags = 0;
e51060f0
SH		 347 qp_attr.port_num = id_priv->id.port_num;
348 return ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_ACCESS_FLAGS |
349 IB_QP_PKEY_INDEX | IB_QP_PORT);
350}
351
07ebafba
TT		 352static int cma_init_iw_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
353{
354 struct ib_qp_attr qp_attr;
355
356 qp_attr.qp_state = IB_QPS_INIT;
357 qp_attr.qp_access_flags = IB_ACCESS_LOCAL_WRITE;
358
359 return ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_ACCESS_FLAGS);
360}
361
e51060f0
SH		 362int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
363 struct ib_qp_init_attr *qp_init_attr)
364{
365 struct rdma_id_private *id_priv;
366 struct ib_qp *qp;
367 int ret;
368
369 id_priv = container_of(id, struct rdma_id_private, id);
370 if (id->device != pd->device)
371 return -EINVAL;
372
373 qp = ib_create_qp(pd, qp_init_attr);
374 if (IS_ERR(qp))
375 return PTR_ERR(qp);
376
07ebafba
TT		 377 switch (rdma_node_get_transport(id->device->node_type)) {
378 case RDMA_TRANSPORT_IB:
e51060f0
SH		 379 ret = cma_init_ib_qp(id_priv, qp);
380 break;
07ebafba
TT		 381 case RDMA_TRANSPORT_IWARP:
382 ret = cma_init_iw_qp(id_priv, qp);
383 break;
e51060f0
SH		 384 default:
385 ret = -ENOSYS;
386 break;
387 }
388
389 if (ret)
390 goto err;
391
392 id->qp = qp;
393 id_priv->qp_num = qp->qp_num;
e51060f0
SH		 394 id_priv->srq = (qp->srq != NULL);
395 return 0;
396err:
397 ib_destroy_qp(qp);
398 return ret;
399}
400EXPORT_SYMBOL(rdma_create_qp);
401
402void rdma_destroy_qp(struct rdma_cm_id *id)
403{
404 ib_destroy_qp(id->qp);
405}
406EXPORT_SYMBOL(rdma_destroy_qp);
407
408static int cma_modify_qp_rtr(struct rdma_cm_id *id)
409{
410 struct ib_qp_attr qp_attr;
411 int qp_attr_mask, ret;
412
413 if (!id->qp)
414 return 0;
415
416 /* Need to update QP attributes from default values. */
417 qp_attr.qp_state = IB_QPS_INIT;
418 ret = rdma_init_qp_attr(id, &qp_attr, &qp_attr_mask);
419 if (ret)
420 return ret;
421
422 ret = ib_modify_qp(id->qp, &qp_attr, qp_attr_mask);
423 if (ret)
424 return ret;
425
426 qp_attr.qp_state = IB_QPS_RTR;
427 ret = rdma_init_qp_attr(id, &qp_attr, &qp_attr_mask);
428 if (ret)
429 return ret;
430
431 return ib_modify_qp(id->qp, &qp_attr, qp_attr_mask);
432}
433
434static int cma_modify_qp_rts(struct rdma_cm_id *id)
435{
436 struct ib_qp_attr qp_attr;
437 int qp_attr_mask, ret;
438
439 if (!id->qp)
440 return 0;
441
442 qp_attr.qp_state = IB_QPS_RTS;
443 ret = rdma_init_qp_attr(id, &qp_attr, &qp_attr_mask);
444 if (ret)
445 return ret;
446
447 return ib_modify_qp(id->qp, &qp_attr, qp_attr_mask);
448}
449
450static int cma_modify_qp_err(struct rdma_cm_id *id)
451{
452 struct ib_qp_attr qp_attr;
453
454 if (!id->qp)
455 return 0;
456
457 qp_attr.qp_state = IB_QPS_ERR;
458 return ib_modify_qp(id->qp, &qp_attr, IB_QP_STATE);
459}
460
461int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
462 int *qp_attr_mask)
463{
464 struct rdma_id_private *id_priv;
465 int ret;
466
467 id_priv = container_of(id, struct rdma_id_private, id);
07ebafba
TT		 468 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
469 case RDMA_TRANSPORT_IB:
e51060f0
SH		 470 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
471 qp_attr_mask);
472 if (qp_attr->qp_state == IB_QPS_RTR)
473 qp_attr->rq_psn = id_priv->seq_num;
474 break;
07ebafba
TT		 475 case RDMA_TRANSPORT_IWARP:
476 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
477 qp_attr_mask);
478 break;
e51060f0
SH		 479 default:
480 ret = -ENOSYS;
481 break;
482 }
483
484 return ret;
485}
486EXPORT_SYMBOL(rdma_init_qp_attr);
487
488static inline int cma_zero_addr(struct sockaddr *addr)
489{
490 struct in6_addr *ip6;
491
492 if (addr->sa_family == AF_INET)
493 return ZERONET(((struct sockaddr_in *) addr)->sin_addr.s_addr);
494 else {
495 ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr;
496 return (ip6->s6_addr32[0] | ip6->s6_addr32[1] |
5fd571cb 497 ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0;
e51060f0
SH		 498 }
499}
500
501static inline int cma_loopback_addr(struct sockaddr *addr)
502{
503 return LOOPBACK(((struct sockaddr_in *) addr)->sin_addr.s_addr);
504}
505
506static inline int cma_any_addr(struct sockaddr *addr)
507{
508 return cma_zero_addr(addr) || cma_loopback_addr(addr);
509}
510
511static inline int cma_any_port(struct sockaddr *addr)
512{
513 return !((struct sockaddr_in *) addr)->sin_port;
514}
515
516static int cma_get_net_info(void *hdr, enum rdma_port_space ps,
517 u8 *ip_ver, __u16 *port,
518 union cma_ip_addr **src, union cma_ip_addr **dst)
519{
520 switch (ps) {
521 case RDMA_PS_SDP:
522 if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) !=
523 SDP_MAJ_VERSION)
524 return -EINVAL;
525
526 *ip_ver = sdp_get_ip_ver(hdr);
527 *port = ((struct sdp_hh *) hdr)->port;
528 *src = &((struct sdp_hh *) hdr)->src_addr;
529 *dst = &((struct sdp_hh *) hdr)->dst_addr;
530 break;
531 default:
532 if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION)
533 return -EINVAL;
534
535 *ip_ver = cma_get_ip_ver(hdr);
536 *port = ((struct cma_hdr *) hdr)->port;
537 *src = &((struct cma_hdr *) hdr)->src_addr;
538 *dst = &((struct cma_hdr *) hdr)->dst_addr;
539 break;
540 }
541
542 if (*ip_ver != 4 && *ip_ver != 6)
543 return -EINVAL;
544 return 0;
545}
546
547static void cma_save_net_info(struct rdma_addr *addr,
548 struct rdma_addr *listen_addr,
549 u8 ip_ver, __u16 port,
550 union cma_ip_addr *src, union cma_ip_addr *dst)
551{
552 struct sockaddr_in *listen4, *ip4;
553 struct sockaddr_in6 *listen6, *ip6;
554
555 switch (ip_ver) {
556 case 4:
557 listen4 = (struct sockaddr_in *) &listen_addr->src_addr;
558 ip4 = (struct sockaddr_in *) &addr->src_addr;
559 ip4->sin_family = listen4->sin_family;
560 ip4->sin_addr.s_addr = dst->ip4.addr;
561 ip4->sin_port = listen4->sin_port;
562
563 ip4 = (struct sockaddr_in *) &addr->dst_addr;
564 ip4->sin_family = listen4->sin_family;
565 ip4->sin_addr.s_addr = src->ip4.addr;
566 ip4->sin_port = port;
567 break;
568 case 6:
569 listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr;
570 ip6 = (struct sockaddr_in6 *) &addr->src_addr;
571 ip6->sin6_family = listen6->sin6_family;
572 ip6->sin6_addr = dst->ip6;
573 ip6->sin6_port = listen6->sin6_port;
574
575 ip6 = (struct sockaddr_in6 *) &addr->dst_addr;
576 ip6->sin6_family = listen6->sin6_family;
577 ip6->sin6_addr = src->ip6;
578 ip6->sin6_port = port;
579 break;
580 default:
581 break;
582 }
583}
584
585static inline int cma_user_data_offset(enum rdma_port_space ps)
586{
587 switch (ps) {
588 case RDMA_PS_SDP:
589 return 0;
590 default:
591 return sizeof(struct cma_hdr);
592 }
593}
594
e51060f0
SH		 595static void cma_cancel_route(struct rdma_id_private *id_priv)
596{
07ebafba
TT		 597 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
598 case RDMA_TRANSPORT_IB:
e51060f0
SH		 599 if (id_priv->query)
600 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
601 break;
602 default:
603 break;
604 }
605}
606
607static inline int cma_internal_listen(struct rdma_id_private *id_priv)
608{
609 return (id_priv->state == CMA_LISTEN) && id_priv->cma_dev &&
610 cma_any_addr(&id_priv->id.route.addr.src_addr);
611}
612
613static void cma_destroy_listen(struct rdma_id_private *id_priv)
614{
615 cma_exch(id_priv, CMA_DESTROYING);
616
617 if (id_priv->cma_dev) {
07ebafba
TT		 618 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
619 case RDMA_TRANSPORT_IB:
3cd96564 620 if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib))
e51060f0
SH		 621 ib_destroy_cm_id(id_priv->cm_id.ib);
622 break;
07ebafba
TT		 623 case RDMA_TRANSPORT_IWARP:
624 if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw))
625 iw_destroy_cm_id(id_priv->cm_id.iw);
626 break;
e51060f0
SH		 627 default:
628 break;
629 }
630 cma_detach_from_dev(id_priv);
631 }
632 list_del(&id_priv->listen_list);
633
634 cma_deref_id(id_priv);
635 wait_for_completion(&id_priv->comp);
636
637 kfree(id_priv);
638}
639
640static void cma_cancel_listens(struct rdma_id_private *id_priv)
641{
642 struct rdma_id_private *dev_id_priv;
643
644 mutex_lock(&lock);
645 list_del(&id_priv->list);
646
647 while (!list_empty(&id_priv->listen_list)) {
648 dev_id_priv = list_entry(id_priv->listen_list.next,
649 struct rdma_id_private, listen_list);
650 cma_destroy_listen(dev_id_priv);
651 }
652 mutex_unlock(&lock);
653}
654
655static void cma_cancel_operation(struct rdma_id_private *id_priv,
656 enum cma_state state)
657{
658 switch (state) {
659 case CMA_ADDR_QUERY:
660 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
661 break;
662 case CMA_ROUTE_QUERY:
663 cma_cancel_route(id_priv);
664 break;
665 case CMA_LISTEN:
666 if (cma_any_addr(&id_priv->id.route.addr.src_addr) &&
667 !id_priv->cma_dev)
668 cma_cancel_listens(id_priv);
669 break;
670 default:
671 break;
672 }
673}
674
675static void cma_release_port(struct rdma_id_private *id_priv)
676{
677 struct rdma_bind_list *bind_list = id_priv->bind_list;
678
679 if (!bind_list)
680 return;
681
682 mutex_lock(&lock);
683 hlist_del(&id_priv->node);
684 if (hlist_empty(&bind_list->owners)) {
685 idr_remove(bind_list->ps, bind_list->port);
686 kfree(bind_list);
687 }
688 mutex_unlock(&lock);
689}
690
691void rdma_destroy_id(struct rdma_cm_id *id)
692{
693 struct rdma_id_private *id_priv;
694 enum cma_state state;
695
696 id_priv = container_of(id, struct rdma_id_private, id);
697 state = cma_exch(id_priv, CMA_DESTROYING);
698 cma_cancel_operation(id_priv, state);
699
61a73c70 700 mutex_lock(&lock);
e51060f0 701 if (id_priv->cma_dev) {
61a73c70 702 mutex_unlock(&lock);
07ebafba
TT		 703 switch (rdma_node_get_transport(id->device->node_type)) {
704 case RDMA_TRANSPORT_IB:
3cd96564 705 if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib))
e51060f0
SH		 706 ib_destroy_cm_id(id_priv->cm_id.ib);
707 break;
07ebafba
TT		 708 case RDMA_TRANSPORT_IWARP:
709 if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw))
710 iw_destroy_cm_id(id_priv->cm_id.iw);
711 break;
e51060f0
SH		 712 default:
713 break;
714 }
3cd96564 715 mutex_lock(&lock);
e51060f0 716 cma_detach_from_dev(id_priv);
e51060f0 717 }
61a73c70 718 mutex_unlock(&lock);
e51060f0
SH		 719
720 cma_release_port(id_priv);
721 cma_deref_id(id_priv);
722 wait_for_completion(&id_priv->comp);
723
724 kfree(id_priv->id.route.path_rec);
725 kfree(id_priv);
726}
727EXPORT_SYMBOL(rdma_destroy_id);
728
729static int cma_rep_recv(struct rdma_id_private *id_priv)
730{
731 int ret;
732
733 ret = cma_modify_qp_rtr(&id_priv->id);
734 if (ret)
735 goto reject;
736
737 ret = cma_modify_qp_rts(&id_priv->id);
738 if (ret)
739 goto reject;
740
741 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
742 if (ret)
743 goto reject;
744
745 return 0;
746reject:
747 cma_modify_qp_err(&id_priv->id);
748 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
749 NULL, 0, NULL, 0);
750 return ret;
751}
752
753static int cma_verify_rep(struct rdma_id_private *id_priv, void *data)
754{
755 if (id_priv->id.ps == RDMA_PS_SDP &&
756 sdp_get_majv(((struct sdp_hah *) data)->sdp_version) !=
757 SDP_MAJ_VERSION)
758 return -EINVAL;
759
760 return 0;
761}
762
a1b1b61f
SH		 763static void cma_set_rep_event_data(struct rdma_cm_event *event,
764 struct ib_cm_rep_event_param *rep_data,
765 void *private_data)
766{
767 event->param.conn.private_data = private_data;
768 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
769 event->param.conn.responder_resources = rep_data->responder_resources;
770 event->param.conn.initiator_depth = rep_data->initiator_depth;
771 event->param.conn.flow_control = rep_data->flow_control;
772 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
773 event->param.conn.srq = rep_data->srq;
774 event->param.conn.qp_num = rep_data->remote_qpn;
775}
776
e51060f0
SH		 777static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
778{
779 struct rdma_id_private *id_priv = cm_id->context;
a1b1b61f
SH		 780 struct rdma_cm_event event;
781 int ret = 0;
e51060f0
SH		 782
783 atomic_inc(&id_priv->dev_remove);
784 if (!cma_comp(id_priv, CMA_CONNECT))
785 goto out;
786
a1b1b61f 787 memset(&event, 0, sizeof event);
e51060f0
SH		 788 switch (ib_event->event) {
789 case IB_CM_REQ_ERROR:
790 case IB_CM_REP_ERROR:
a1b1b61f
SH		 791 event.event = RDMA_CM_EVENT_UNREACHABLE;
792 event.status = -ETIMEDOUT;
e51060f0
SH		 793 break;
794 case IB_CM_REP_RECEIVED:
a1b1b61f
SH		 795 event.status = cma_verify_rep(id_priv, ib_event->private_data);
796 if (event.status)
797 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
e51060f0 798 else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) {
a1b1b61f
SH		 799 event.status = cma_rep_recv(id_priv);
800 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
801 RDMA_CM_EVENT_ESTABLISHED;
e51060f0 802 } else
a1b1b61f
SH		 803 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
804 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
805 ib_event->private_data);
e51060f0
SH		 806 break;
807 case IB_CM_RTU_RECEIVED:
0fe313b0
SH		 808 case IB_CM_USER_ESTABLISHED:
809 event.event = RDMA_CM_EVENT_ESTABLISHED;
e51060f0
SH		 810 break;
811 case IB_CM_DREQ_ERROR:
a1b1b61f 812 event.status = -ETIMEDOUT; /* fall through */
e51060f0
SH		 813 case IB_CM_DREQ_RECEIVED:
814 case IB_CM_DREP_RECEIVED:
815 if (!cma_comp_exch(id_priv, CMA_CONNECT, CMA_DISCONNECT))
816 goto out;
a1b1b61f 817 event.event = RDMA_CM_EVENT_DISCONNECTED;
e51060f0
SH		 818 break;
819 case IB_CM_TIMEWAIT_EXIT:
820 case IB_CM_MRA_RECEIVED:
821 /* ignore event */
822 goto out;
823 case IB_CM_REJ_RECEIVED:
824 cma_modify_qp_err(&id_priv->id);
a1b1b61f
SH		 825 event.status = ib_event->param.rej_rcvd.reason;
826 event.event = RDMA_CM_EVENT_REJECTED;
827 event.param.conn.private_data = ib_event->private_data;
828 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
e51060f0
SH		 829 break;
830 default:
831 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d",
832 ib_event->event);
833 goto out;
834 }
835
a1b1b61f 836 ret = id_priv->id.event_handler(&id_priv->id, &event);
e51060f0
SH		 837 if (ret) {
838 /* Destroy the CM ID by returning a non-zero value. */
839 id_priv->cm_id.ib = NULL;
840 cma_exch(id_priv, CMA_DESTROYING);
841 cma_release_remove(id_priv);
842 rdma_destroy_id(&id_priv->id);
843 return ret;
844 }
845out:
846 cma_release_remove(id_priv);
847 return ret;
848}
849
850static struct rdma_id_private *cma_new_id(struct rdma_cm_id *listen_id,
851 struct ib_cm_event *ib_event)
852{
853 struct rdma_id_private *id_priv;
854 struct rdma_cm_id *id;
855 struct rdma_route *rt;
856 union cma_ip_addr *src, *dst;
857 __u16 port;
858 u8 ip_ver;
859
3f168d2b
KK		 860 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
861 &ip_ver, &port, &src, &dst))
862 goto err;
863
e51060f0
SH		 864 id = rdma_create_id(listen_id->event_handler, listen_id->context,
865 listen_id->ps);
866 if (IS_ERR(id))
3f168d2b
KK		 867 goto err;
868
869 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
870 ip_ver, port, src, dst);
e51060f0
SH		 871
872 rt = &id->route;
873 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
3f168d2b
KK		 874 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
875 GFP_KERNEL);
e51060f0 876 if (!rt->path_rec)
3f168d2b 877 goto destroy_id;
e51060f0 878
e51060f0
SH		 879 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
880 if (rt->num_paths == 2)
881 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
882
883 ib_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
884 ib_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
885 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
07ebafba 886 rt->addr.dev_addr.dev_type = RDMA_NODE_IB_CA;
e51060f0
SH		 887
888 id_priv = container_of(id, struct rdma_id_private, id);
889 id_priv->state = CMA_CONNECT;
890 return id_priv;
3f168d2b
KK		 891
892destroy_id:
e51060f0 893 rdma_destroy_id(id);
3f168d2b 894err:
e51060f0
SH		 895 return NULL;
896}
897
a1b1b61f
SH		 898static void cma_set_req_event_data(struct rdma_cm_event *event,
899 struct ib_cm_req_event_param *req_data,
900 void *private_data, int offset)
901{
902 event->param.conn.private_data = private_data + offset;
903 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
904 event->param.conn.responder_resources = req_data->responder_resources;
905 event->param.conn.initiator_depth = req_data->initiator_depth;
906 event->param.conn.flow_control = req_data->flow_control;
907 event->param.conn.retry_count = req_data->retry_count;
908 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
909 event->param.conn.srq = req_data->srq;
910 event->param.conn.qp_num = req_data->remote_qpn;
911}
912
e51060f0
SH		 913static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
914{
915 struct rdma_id_private *listen_id, *conn_id;
a1b1b61f 916 struct rdma_cm_event event;
e51060f0
SH		 917 int offset, ret;
918
919 listen_id = cm_id->context;
920 atomic_inc(&listen_id->dev_remove);
921 if (!cma_comp(listen_id, CMA_LISTEN)) {
922 ret = -ECONNABORTED;
923 goto out;
924 }
925
926 conn_id = cma_new_id(&listen_id->id, ib_event);
927 if (!conn_id) {
928 ret = -ENOMEM;
929 goto out;
930 }
931
932 atomic_inc(&conn_id->dev_remove);
61a73c70 933 mutex_lock(&lock);
07ebafba 934 ret = cma_acquire_dev(conn_id);
61a73c70 935 mutex_unlock(&lock);
a1a733f6
KK		 936 if (ret)
937 goto release_conn_id;
e51060f0
SH		 938
939 conn_id->cm_id.ib = cm_id;
940 cm_id->context = conn_id;
941 cm_id->cm_handler = cma_ib_handler;
942
943 offset = cma_user_data_offset(listen_id->id.ps);
a1b1b61f
SH		 944 memset(&event, 0, sizeof event);
945 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
946 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
947 ib_event->private_data, offset);
948 ret = conn_id->id.event_handler(&conn_id->id, &event);
a1a733f6
KK		 949 if (!ret)
950 goto out;
951
952 /* Destroy the CM ID by returning a non-zero value. */
953 conn_id->cm_id.ib = NULL;
954
955release_conn_id:
956 cma_exch(conn_id, CMA_DESTROYING);
957 cma_release_remove(conn_id);
958 rdma_destroy_id(&conn_id->id);
959
e51060f0
SH		 960out:
961 cma_release_remove(listen_id);
962 return ret;
963}
964
965static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr)
966{
967 return cpu_to_be64(((u64)ps << 16) +
968 be16_to_cpu(((struct sockaddr_in *) addr)->sin_port));
969}
970
971static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr,
972 struct ib_cm_compare_data *compare)
973{
974 struct cma_hdr *cma_data, *cma_mask;
975 struct sdp_hh *sdp_data, *sdp_mask;
976 __u32 ip4_addr;
977 struct in6_addr ip6_addr;
978
979 memset(compare, 0, sizeof *compare);
980 cma_data = (void *) compare->data;
981 cma_mask = (void *) compare->mask;
982 sdp_data = (void *) compare->data;
983 sdp_mask = (void *) compare->mask;
984
985 switch (addr->sa_family) {
986 case AF_INET:
987 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
988 if (ps == RDMA_PS_SDP) {
989 sdp_set_ip_ver(sdp_data, 4);
990 sdp_set_ip_ver(sdp_mask, 0xF);
991 sdp_data->dst_addr.ip4.addr = ip4_addr;
992 sdp_mask->dst_addr.ip4.addr = ~0;
993 } else {
994 cma_set_ip_ver(cma_data, 4);
995 cma_set_ip_ver(cma_mask, 0xF);
996 cma_data->dst_addr.ip4.addr = ip4_addr;
997 cma_mask->dst_addr.ip4.addr = ~0;
998 }
999 break;
1000 case AF_INET6:
1001 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr;
1002 if (ps == RDMA_PS_SDP) {
1003 sdp_set_ip_ver(sdp_data, 6);
1004 sdp_set_ip_ver(sdp_mask, 0xF);
1005 sdp_data->dst_addr.ip6 = ip6_addr;
1006 memset(&sdp_mask->dst_addr.ip6, 0xFF,
1007 sizeof sdp_mask->dst_addr.ip6);
1008 } else {
1009 cma_set_ip_ver(cma_data, 6);
1010 cma_set_ip_ver(cma_mask, 0xF);
1011 cma_data->dst_addr.ip6 = ip6_addr;
1012 memset(&cma_mask->dst_addr.ip6, 0xFF,
1013 sizeof cma_mask->dst_addr.ip6);
1014 }
1015 break;
1016 default:
1017 break;
1018 }
1019}
1020
07ebafba
TT		 1021static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1022{
1023 struct rdma_id_private *id_priv = iw_id->context;
a1b1b61f 1024 struct rdma_cm_event event;
07ebafba
TT		 1025 struct sockaddr_in *sin;
1026 int ret = 0;
1027
a1b1b61f 1028 memset(&event, 0, sizeof event);
07ebafba
TT		 1029 atomic_inc(&id_priv->dev_remove);
1030
1031 switch (iw_event->event) {
1032 case IW_CM_EVENT_CLOSE:
a1b1b61f 1033 event.event = RDMA_CM_EVENT_DISCONNECTED;
07ebafba
TT		 1034 break;
1035 case IW_CM_EVENT_CONNECT_REPLY:
1036 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1037 *sin = iw_event->local_addr;
1038 sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr;
1039 *sin = iw_event->remote_addr;
1040 if (iw_event->status)
a1b1b61f 1041 event.event = RDMA_CM_EVENT_REJECTED;
07ebafba 1042 else
a1b1b61f 1043 event.event = RDMA_CM_EVENT_ESTABLISHED;
07ebafba
TT		 1044 break;
1045 case IW_CM_EVENT_ESTABLISHED:
a1b1b61f 1046 event.event = RDMA_CM_EVENT_ESTABLISHED;
07ebafba
TT		 1047 break;
1048 default:
1049 BUG_ON(1);
1050 }
1051
a1b1b61f
SH		 1052 event.status = iw_event->status;
1053 event.param.conn.private_data = iw_event->private_data;
1054 event.param.conn.private_data_len = iw_event->private_data_len;
1055 ret = id_priv->id.event_handler(&id_priv->id, &event);
07ebafba
TT		 1056 if (ret) {
1057 /* Destroy the CM ID by returning a non-zero value. */
1058 id_priv->cm_id.iw = NULL;
1059 cma_exch(id_priv, CMA_DESTROYING);
1060 cma_release_remove(id_priv);
1061 rdma_destroy_id(&id_priv->id);
1062 return ret;
1063 }
1064
1065 cma_release_remove(id_priv);
1066 return ret;
1067}
1068
1069static int iw_conn_req_handler(struct iw_cm_id *cm_id,
1070 struct iw_cm_event *iw_event)
1071{
1072 struct rdma_cm_id *new_cm_id;
1073 struct rdma_id_private *listen_id, *conn_id;
1074 struct sockaddr_in *sin;
1075 struct net_device *dev = NULL;
a1b1b61f 1076 struct rdma_cm_event event;
07ebafba
TT		 1077 int ret;
1078
1079 listen_id = cm_id->context;
1080 atomic_inc(&listen_id->dev_remove);
1081 if (!cma_comp(listen_id, CMA_LISTEN)) {
1082 ret = -ECONNABORTED;
1083 goto out;
1084 }
1085
1086 /* Create a new RDMA id for the new IW CM ID */
1087 new_cm_id = rdma_create_id(listen_id->id.event_handler,
1088 listen_id->id.context,
1089 RDMA_PS_TCP);
1090 if (!new_cm_id) {
1091 ret = -ENOMEM;
1092 goto out;
1093 }
1094 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
1095 atomic_inc(&conn_id->dev_remove);
1096 conn_id->state = CMA_CONNECT;
1097
1098 dev = ip_dev_find(iw_event->local_addr.sin_addr.s_addr);
1099 if (!dev) {
1100 ret = -EADDRNOTAVAIL;
1101 cma_release_remove(conn_id);
1102 rdma_destroy_id(new_cm_id);
1103 goto out;
1104 }
1105 ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL);
1106 if (ret) {
1107 cma_release_remove(conn_id);
1108 rdma_destroy_id(new_cm_id);
1109 goto out;
1110 }
1111
61a73c70 1112 mutex_lock(&lock);
07ebafba 1113 ret = cma_acquire_dev(conn_id);
61a73c70 1114 mutex_unlock(&lock);
07ebafba
TT		 1115 if (ret) {
1116 cma_release_remove(conn_id);
1117 rdma_destroy_id(new_cm_id);
1118 goto out;
1119 }
1120
1121 conn_id->cm_id.iw = cm_id;
1122 cm_id->context = conn_id;
1123 cm_id->cm_handler = cma_iw_handler;
1124
1125 sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr;
1126 *sin = iw_event->local_addr;
1127 sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr;
1128 *sin = iw_event->remote_addr;
1129
a1b1b61f
SH		 1130 memset(&event, 0, sizeof event);
1131 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1132 event.param.conn.private_data = iw_event->private_data;
1133 event.param.conn.private_data_len = iw_event->private_data_len;
1134 ret = conn_id->id.event_handler(&conn_id->id, &event);
07ebafba
TT		 1135 if (ret) {
1136 /* User wants to destroy the CM ID */
1137 conn_id->cm_id.iw = NULL;
1138 cma_exch(conn_id, CMA_DESTROYING);
1139 cma_release_remove(conn_id);
1140 rdma_destroy_id(&conn_id->id);
1141 }
1142
1143out:
1144 if (dev)
1145 dev_put(dev);
1146 cma_release_remove(listen_id);
1147 return ret;
1148}
1149
e51060f0
SH		 1150static int cma_ib_listen(struct rdma_id_private *id_priv)
1151{
1152 struct ib_cm_compare_data compare_data;
1153 struct sockaddr *addr;
1154 __be64 svc_id;
1155 int ret;
1156
1157 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_req_handler,
1158 id_priv);
1159 if (IS_ERR(id_priv->cm_id.ib))
1160 return PTR_ERR(id_priv->cm_id.ib);
1161
1162 addr = &id_priv->id.route.addr.src_addr;
1163 svc_id = cma_get_service_id(id_priv->id.ps, addr);
1164 if (cma_any_addr(addr))
1165 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL);
1166 else {
1167 cma_set_compare_data(id_priv->id.ps, addr, &compare_data);
1168 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data);
1169 }
1170
1171 if (ret) {
1172 ib_destroy_cm_id(id_priv->cm_id.ib);
1173 id_priv->cm_id.ib = NULL;
1174 }
1175
1176 return ret;
1177}
1178
07ebafba
TT		 1179static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
1180{
1181 int ret;
1182 struct sockaddr_in *sin;
1183
1184 id_priv->cm_id.iw = iw_create_cm_id(id_priv->id.device,
1185 iw_conn_req_handler,
1186 id_priv);
1187 if (IS_ERR(id_priv->cm_id.iw))
1188 return PTR_ERR(id_priv->cm_id.iw);
1189
1190 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1191 id_priv->cm_id.iw->local_addr = *sin;
1192
1193 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
1194
1195 if (ret) {
1196 iw_destroy_cm_id(id_priv->cm_id.iw);
1197 id_priv->cm_id.iw = NULL;
1198 }
1199
1200 return ret;
1201}
1202
e51060f0
SH		 1203static int cma_listen_handler(struct rdma_cm_id *id,
1204 struct rdma_cm_event *event)
1205{
1206 struct rdma_id_private *id_priv = id->context;
1207
1208 id->context = id_priv->id.context;
1209 id->event_handler = id_priv->id.event_handler;
1210 return id_priv->id.event_handler(id, event);
1211}
1212
1213static void cma_listen_on_dev(struct rdma_id_private *id_priv,
1214 struct cma_device *cma_dev)
1215{
1216 struct rdma_id_private *dev_id_priv;
1217 struct rdma_cm_id *id;
1218 int ret;
1219
1220 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps);
1221 if (IS_ERR(id))
1222 return;
1223
1224 dev_id_priv = container_of(id, struct rdma_id_private, id);
1225
1226 dev_id_priv->state = CMA_ADDR_BOUND;
1227 memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr,
1228 ip_addr_size(&id_priv->id.route.addr.src_addr));
1229
1230 cma_attach_to_dev(dev_id_priv, cma_dev);
1231 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
1232
1233 ret = rdma_listen(id, id_priv->backlog);
1234 if (ret)
1235 goto err;
1236
1237 return;
1238err:
1239 cma_destroy_listen(dev_id_priv);
1240}
1241
1242static void cma_listen_on_all(struct rdma_id_private *id_priv)
1243{
1244 struct cma_device *cma_dev;
1245
1246 mutex_lock(&lock);
1247 list_add_tail(&id_priv->list, &listen_any_list);
1248 list_for_each_entry(cma_dev, &dev_list, list)
1249 cma_listen_on_dev(id_priv, cma_dev);
1250 mutex_unlock(&lock);
1251}
1252
1253static int cma_bind_any(struct rdma_cm_id *id, sa_family_t af)
1254{
1255 struct sockaddr_in addr_in;
1256
1257 memset(&addr_in, 0, sizeof addr_in);
1258 addr_in.sin_family = af;
1259 return rdma_bind_addr(id, (struct sockaddr *) &addr_in);
1260}
1261
1262int rdma_listen(struct rdma_cm_id *id, int backlog)
1263{
1264 struct rdma_id_private *id_priv;
1265 int ret;
1266
1267 id_priv = container_of(id, struct rdma_id_private, id);
1268 if (id_priv->state == CMA_IDLE) {
1269 ret = cma_bind_any(id, AF_INET);
1270 if (ret)
1271 return ret;
1272 }
1273
1274 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_LISTEN))
1275 return -EINVAL;
1276
1277 id_priv->backlog = backlog;
1278 if (id->device) {
07ebafba
TT		 1279 switch (rdma_node_get_transport(id->device->node_type)) {
1280 case RDMA_TRANSPORT_IB:
e51060f0
SH		 1281 ret = cma_ib_listen(id_priv);
1282 if (ret)
1283 goto err;
1284 break;
07ebafba
TT		 1285 case RDMA_TRANSPORT_IWARP:
1286 ret = cma_iw_listen(id_priv, backlog);
1287 if (ret)
1288 goto err;
1289 break;
e51060f0
SH		 1290 default:
1291 ret = -ENOSYS;
1292 goto err;
1293 }
1294 } else
1295 cma_listen_on_all(id_priv);
1296
1297 return 0;
1298err:
1299 id_priv->backlog = 0;
1300 cma_comp_exch(id_priv, CMA_LISTEN, CMA_ADDR_BOUND);
1301 return ret;
1302}
1303EXPORT_SYMBOL(rdma_listen);
1304
1305static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
1306 void *context)
1307{
1308 struct cma_work *work = context;
1309 struct rdma_route *route;
1310
1311 route = &work->id->id.route;
1312
1313 if (!status) {
1314 route->num_paths = 1;
1315 *route->path_rec = *path_rec;
1316 } else {
1317 work->old_state = CMA_ROUTE_QUERY;
1318 work->new_state = CMA_ADDR_RESOLVED;
1319 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
8f0472d3 1320 work->event.status = status;
e51060f0
SH		 1321 }
1322
1323 queue_work(cma_wq, &work->work);
1324}
1325
1326static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
1327 struct cma_work *work)
1328{
1329 struct rdma_dev_addr *addr = &id_priv->id.route.addr.dev_addr;
1330 struct ib_sa_path_rec path_rec;
1331
1332 memset(&path_rec, 0, sizeof path_rec);
f0ee3404
MT		 1333 ib_addr_get_sgid(addr, &path_rec.sgid);
1334 ib_addr_get_dgid(addr, &path_rec.dgid);
e51060f0
SH		 1335 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(addr));
1336 path_rec.numb_path = 1;
1337
c1a0b23b 1338 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
e51060f0
SH		 1339 id_priv->id.port_num, &path_rec,
1340 IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
1341 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH,
1342 timeout_ms, GFP_KERNEL,
1343 cma_query_handler, work, &id_priv->query);
1344
1345 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
1346}
1347
c4028958 1348static void cma_work_handler(struct work_struct *_work)
e51060f0 1349{
c4028958 1350 struct cma_work *work = container_of(_work, struct cma_work, work);
e51060f0
SH		 1351 struct rdma_id_private *id_priv = work->id;
1352 int destroy = 0;
1353
1354 atomic_inc(&id_priv->dev_remove);
1355 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
1356 goto out;
1357
1358 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1359 cma_exch(id_priv, CMA_DESTROYING);
1360 destroy = 1;
1361 }
1362out:
1363 cma_release_remove(id_priv);
1364 cma_deref_id(id_priv);
1365 if (destroy)
1366 rdma_destroy_id(&id_priv->id);
1367 kfree(work);
1368}
1369
1370static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
1371{
1372 struct rdma_route *route = &id_priv->id.route;
1373 struct cma_work *work;
1374 int ret;
1375
1376 work = kzalloc(sizeof *work, GFP_KERNEL);
1377 if (!work)
1378 return -ENOMEM;
1379
1380 work->id = id_priv;
c4028958 1381 INIT_WORK(&work->work, cma_work_handler);
e51060f0
SH		 1382 work->old_state = CMA_ROUTE_QUERY;
1383 work->new_state = CMA_ROUTE_RESOLVED;
1384 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1385
1386 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
1387 if (!route->path_rec) {
1388 ret = -ENOMEM;
1389 goto err1;
1390 }
1391
1392 ret = cma_query_ib_route(id_priv, timeout_ms, work);
1393 if (ret)
1394 goto err2;
1395
1396 return 0;
1397err2:
1398 kfree(route->path_rec);
1399 route->path_rec = NULL;
1400err1:
1401 kfree(work);
1402 return ret;
1403}
1404
1405int rdma_set_ib_paths(struct rdma_cm_id *id,
1406 struct ib_sa_path_rec *path_rec, int num_paths)
1407{
1408 struct rdma_id_private *id_priv;
1409 int ret;
1410
1411 id_priv = container_of(id, struct rdma_id_private, id);
1412 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_RESOLVED))
1413 return -EINVAL;
1414
1415 id->route.path_rec = kmalloc(sizeof *path_rec * num_paths, GFP_KERNEL);
1416 if (!id->route.path_rec) {
1417 ret = -ENOMEM;
1418 goto err;
1419 }
1420
1421 memcpy(id->route.path_rec, path_rec, sizeof *path_rec * num_paths);
1422 return 0;
1423err:
1424 cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_ADDR_RESOLVED);
1425 return ret;
1426}
1427EXPORT_SYMBOL(rdma_set_ib_paths);
1428
07ebafba
TT		 1429static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
1430{
1431 struct cma_work *work;
1432
1433 work = kzalloc(sizeof *work, GFP_KERNEL);
1434 if (!work)
1435 return -ENOMEM;
1436
1437 work->id = id_priv;
c4028958 1438 INIT_WORK(&work->work, cma_work_handler);
07ebafba
TT		 1439 work->old_state = CMA_ROUTE_QUERY;
1440 work->new_state = CMA_ROUTE_RESOLVED;
1441 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1442 queue_work(cma_wq, &work->work);
1443 return 0;
1444}
1445
e51060f0
SH		 1446int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
1447{
1448 struct rdma_id_private *id_priv;
1449 int ret;
1450
1451 id_priv = container_of(id, struct rdma_id_private, id);
1452 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_QUERY))
1453 return -EINVAL;
1454
1455 atomic_inc(&id_priv->refcount);
07ebafba
TT		 1456 switch (rdma_node_get_transport(id->device->node_type)) {
1457 case RDMA_TRANSPORT_IB:
e51060f0
SH		 1458 ret = cma_resolve_ib_route(id_priv, timeout_ms);
1459 break;
07ebafba
TT		 1460 case RDMA_TRANSPORT_IWARP:
1461 ret = cma_resolve_iw_route(id_priv, timeout_ms);
1462 break;
e51060f0
SH		 1463 default:
1464 ret = -ENOSYS;
1465 break;
1466 }
1467 if (ret)
1468 goto err;
1469
1470 return 0;
1471err:
1472 cma_comp_exch(id_priv, CMA_ROUTE_QUERY, CMA_ADDR_RESOLVED);
1473 cma_deref_id(id_priv);
1474 return ret;
1475}
1476EXPORT_SYMBOL(rdma_resolve_route);
1477
1478static int cma_bind_loopback(struct rdma_id_private *id_priv)
1479{
1480 struct cma_device *cma_dev;
1481 struct ib_port_attr port_attr;
f0ee3404 1482 union ib_gid gid;
e51060f0
SH		 1483 u16 pkey;
1484 int ret;
1485 u8 p;
1486
1487 mutex_lock(&lock);
e82153b5
KK		 1488 if (list_empty(&dev_list)) {
1489 ret = -ENODEV;
1490 goto out;
1491 }
e51060f0
SH		 1492 list_for_each_entry(cma_dev, &dev_list, list)
1493 for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p)
e82153b5 1494 if (!ib_query_port(cma_dev->device, p, &port_attr) &&
e51060f0
SH		 1495 port_attr.state == IB_PORT_ACTIVE)
1496 goto port_found;
1497
e82153b5
KK		 1498 p = 1;
1499 cma_dev = list_entry(dev_list.next, struct cma_device, list);
e51060f0
SH		 1500
1501port_found:
f0ee3404 1502 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid);
e51060f0
SH		 1503 if (ret)
1504 goto out;
1505
1506 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
1507 if (ret)
1508 goto out;
1509
f0ee3404 1510 ib_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0
SH		 1511 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
1512 id_priv->id.port_num = p;
1513 cma_attach_to_dev(id_priv, cma_dev);
1514out:
1515 mutex_unlock(&lock);
1516 return ret;
1517}
1518
1519static void addr_handler(int status, struct sockaddr *src_addr,
1520 struct rdma_dev_addr *dev_addr, void *context)
1521{
1522 struct rdma_id_private *id_priv = context;
a1b1b61f 1523 struct rdma_cm_event event;
e51060f0 1524
a1b1b61f 1525 memset(&event, 0, sizeof event);
e51060f0 1526 atomic_inc(&id_priv->dev_remove);
61a73c70
SH		 1527
1528 /*
1529 * Grab mutex to block rdma_destroy_id() from removing the device while
1530 * we're trying to acquire it.
1531 */
1532 mutex_lock(&lock);
1533 if (!cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_RESOLVED)) {
1534 mutex_unlock(&lock);
1535 goto out;
1536 }
1537
1538 if (!status && !id_priv->cma_dev)
e51060f0 1539 status = cma_acquire_dev(id_priv);
61a73c70 1540 mutex_unlock(&lock);
e51060f0
SH		 1541
1542 if (status) {
61a73c70 1543 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ADDR_BOUND))
e51060f0 1544 goto out;
a1b1b61f
SH		 1545 event.event = RDMA_CM_EVENT_ADDR_ERROR;
1546 event.status = status;
e51060f0 1547 } else {
e51060f0
SH		 1548 memcpy(&id_priv->id.route.addr.src_addr, src_addr,
1549 ip_addr_size(src_addr));
a1b1b61f 1550 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
e51060f0
SH		 1551 }
1552
a1b1b61f 1553 if (id_priv->id.event_handler(&id_priv->id, &event)) {
e51060f0
SH		 1554 cma_exch(id_priv, CMA_DESTROYING);
1555 cma_release_remove(id_priv);
1556 cma_deref_id(id_priv);
1557 rdma_destroy_id(&id_priv->id);
1558 return;
1559 }
1560out:
1561 cma_release_remove(id_priv);
1562 cma_deref_id(id_priv);
1563}
1564
1565static int cma_resolve_loopback(struct rdma_id_private *id_priv)
1566{
1567 struct cma_work *work;
1568 struct sockaddr_in *src_in, *dst_in;
f0ee3404 1569 union ib_gid gid;
e51060f0
SH		 1570 int ret;
1571
1572 work = kzalloc(sizeof *work, GFP_KERNEL);
1573 if (!work)
1574 return -ENOMEM;
1575
1576 if (!id_priv->cma_dev) {
1577 ret = cma_bind_loopback(id_priv);
1578 if (ret)
1579 goto err;
1580 }
1581
f0ee3404
MT		 1582 ib_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
1583 ib_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0
SH		 1584
1585 if (cma_zero_addr(&id_priv->id.route.addr.src_addr)) {
1586 src_in = (struct sockaddr_in *)&id_priv->id.route.addr.src_addr;
1587 dst_in = (struct sockaddr_in *)&id_priv->id.route.addr.dst_addr;
1588 src_in->sin_family = dst_in->sin_family;
1589 src_in->sin_addr.s_addr = dst_in->sin_addr.s_addr;
1590 }
1591
1592 work->id = id_priv;
c4028958 1593 INIT_WORK(&work->work, cma_work_handler);
e51060f0
SH		 1594 work->old_state = CMA_ADDR_QUERY;
1595 work->new_state = CMA_ADDR_RESOLVED;
1596 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
1597 queue_work(cma_wq, &work->work);
1598 return 0;
1599err:
1600 kfree(work);
1601 return ret;
1602}
1603
1604static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
1605 struct sockaddr *dst_addr)
1606{
1607 if (src_addr && src_addr->sa_family)
1608 return rdma_bind_addr(id, src_addr);
1609 else
1610 return cma_bind_any(id, dst_addr->sa_family);
1611}
1612
1613int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
1614 struct sockaddr *dst_addr, int timeout_ms)
1615{
1616 struct rdma_id_private *id_priv;
1617 int ret;
1618
1619 id_priv = container_of(id, struct rdma_id_private, id);
1620 if (id_priv->state == CMA_IDLE) {
1621 ret = cma_bind_addr(id, src_addr, dst_addr);
1622 if (ret)
1623 return ret;
1624 }
1625
1626 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_ADDR_QUERY))
1627 return -EINVAL;
1628
1629 atomic_inc(&id_priv->refcount);
1630 memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr));
1631 if (cma_any_addr(dst_addr))
1632 ret = cma_resolve_loopback(id_priv);
1633 else
7a118df3
SH		 1634 ret = rdma_resolve_ip(&addr_client, &id->route.addr.src_addr,
1635 dst_addr, &id->route.addr.dev_addr,
e51060f0
SH		 1636 timeout_ms, addr_handler, id_priv);
1637 if (ret)
1638 goto err;
1639
1640 return 0;
1641err:
1642 cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_BOUND);
1643 cma_deref_id(id_priv);
1644 return ret;
1645}
1646EXPORT_SYMBOL(rdma_resolve_addr);
1647
1648static void cma_bind_port(struct rdma_bind_list *bind_list,
1649 struct rdma_id_private *id_priv)
1650{
1651 struct sockaddr_in *sin;
1652
1653 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1654 sin->sin_port = htons(bind_list->port);
1655 id_priv->bind_list = bind_list;
1656 hlist_add_head(&id_priv->node, &bind_list->owners);
1657}
1658
1659static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv,
1660 unsigned short snum)
1661{
1662 struct rdma_bind_list *bind_list;
1663 int port, start, ret;
1664
1665 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
1666 if (!bind_list)
1667 return -ENOMEM;
1668
1669 start = snum ? snum : sysctl_local_port_range[0];
1670
1671 do {
1672 ret = idr_get_new_above(ps, bind_list, start, &port);
1673 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL));
1674
1675 if (ret)
1676 goto err;
1677
1678 if ((snum && port != snum) ||
1679 (!snum && port > sysctl_local_port_range[1])) {
1680 idr_remove(ps, port);
1681 ret = -EADDRNOTAVAIL;
1682 goto err;
1683 }
1684
1685 bind_list->ps = ps;
1686 bind_list->port = (unsigned short) port;
1687 cma_bind_port(bind_list, id_priv);
1688 return 0;
1689err:
1690 kfree(bind_list);
1691 return ret;
1692}
1693
1694static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv)
1695{
1696 struct rdma_id_private *cur_id;
1697 struct sockaddr_in *sin, *cur_sin;
1698 struct rdma_bind_list *bind_list;
1699 struct hlist_node *node;
1700 unsigned short snum;
1701
1702 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1703 snum = ntohs(sin->sin_port);
1704 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
1705 return -EACCES;
1706
1707 bind_list = idr_find(ps, snum);
1708 if (!bind_list)
1709 return cma_alloc_port(ps, id_priv, snum);
1710
1711 /*
1712 * We don't support binding to any address if anyone is bound to
1713 * a specific address on the same port.
1714 */
1715 if (cma_any_addr(&id_priv->id.route.addr.src_addr))
1716 return -EADDRNOTAVAIL;
1717
1718 hlist_for_each_entry(cur_id, node, &bind_list->owners, node) {
1719 if (cma_any_addr(&cur_id->id.route.addr.src_addr))
1720 return -EADDRNOTAVAIL;
3cd96564 1721
e51060f0
SH		 1722 cur_sin = (struct sockaddr_in *) &cur_id->id.route.addr.src_addr;
1723 if (sin->sin_addr.s_addr == cur_sin->sin_addr.s_addr)
1724 return -EADDRINUSE;
1725 }
1726
1727 cma_bind_port(bind_list, id_priv);
1728 return 0;
1729}
1730
1731static int cma_get_port(struct rdma_id_private *id_priv)
1732{
1733 struct idr *ps;
1734 int ret;
1735
1736 switch (id_priv->id.ps) {
1737 case RDMA_PS_SDP:
1738 ps = &sdp_ps;
1739 break;
1740 case RDMA_PS_TCP:
1741 ps = &tcp_ps;
1742 break;
1743 default:
1744 return -EPROTONOSUPPORT;
1745 }
1746
1747 mutex_lock(&lock);
1748 if (cma_any_port(&id_priv->id.route.addr.src_addr))
1749 ret = cma_alloc_port(ps, id_priv, 0);
1750 else
1751 ret = cma_use_port(ps, id_priv);
1752 mutex_unlock(&lock);
1753
1754 return ret;
1755}
1756
1757int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
1758{
1759 struct rdma_id_private *id_priv;
1760 int ret;
1761
1762 if (addr->sa_family != AF_INET)
1763 return -EAFNOSUPPORT;
1764
1765 id_priv = container_of(id, struct rdma_id_private, id);
1766 if (!cma_comp_exch(id_priv, CMA_IDLE, CMA_ADDR_BOUND))
1767 return -EINVAL;
1768
1769 if (!cma_any_addr(addr)) {
1770 ret = rdma_translate_ip(addr, &id->route.addr.dev_addr);
e51060f0 1771 if (ret)
255d0c14
KK		 1772 goto err1;
1773
1774 mutex_lock(&lock);
1775 ret = cma_acquire_dev(id_priv);
1776 mutex_unlock(&lock);
1777 if (ret)
1778 goto err1;
e51060f0
SH		 1779 }
1780
1781 memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr));
1782 ret = cma_get_port(id_priv);
1783 if (ret)
255d0c14 1784 goto err2;
e51060f0
SH		 1785
1786 return 0;
255d0c14
KK		 1787err2:
1788 if (!cma_any_addr(addr)) {
1789 mutex_lock(&lock);
1790 cma_detach_from_dev(id_priv);
1791 mutex_unlock(&lock);
1792 }
1793err1:
e51060f0
SH		 1794 cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_IDLE);
1795 return ret;
1796}
1797EXPORT_SYMBOL(rdma_bind_addr);
1798
1799static int cma_format_hdr(void *hdr, enum rdma_port_space ps,
1800 struct rdma_route *route)
1801{
1802 struct sockaddr_in *src4, *dst4;
1803 struct cma_hdr *cma_hdr;
1804 struct sdp_hh *sdp_hdr;
1805
1806 src4 = (struct sockaddr_in *) &route->addr.src_addr;
1807 dst4 = (struct sockaddr_in *) &route->addr.dst_addr;
1808
1809 switch (ps) {
1810 case RDMA_PS_SDP:
1811 sdp_hdr = hdr;
1812 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
1813 return -EINVAL;
1814 sdp_set_ip_ver(sdp_hdr, 4);
1815 sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
1816 sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
1817 sdp_hdr->port = src4->sin_port;
1818 break;
1819 default:
1820 cma_hdr = hdr;
1821 cma_hdr->cma_version = CMA_VERSION;
1822 cma_set_ip_ver(cma_hdr, 4);
1823 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
1824 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
1825 cma_hdr->port = src4->sin_port;
1826 break;
1827 }
1828 return 0;
1829}
1830
1831static int cma_connect_ib(struct rdma_id_private *id_priv,
1832 struct rdma_conn_param *conn_param)
1833{
1834 struct ib_cm_req_param req;
1835 struct rdma_route *route;
1836 void *private_data;
1837 int offset, ret;
1838
1839 memset(&req, 0, sizeof req);
1840 offset = cma_user_data_offset(id_priv->id.ps);
1841 req.private_data_len = offset + conn_param->private_data_len;
1842 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
1843 if (!private_data)
1844 return -ENOMEM;
1845
1846 if (conn_param->private_data && conn_param->private_data_len)
1847 memcpy(private_data + offset, conn_param->private_data,
1848 conn_param->private_data_len);
1849
1850 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_ib_handler,
1851 id_priv);
1852 if (IS_ERR(id_priv->cm_id.ib)) {
1853 ret = PTR_ERR(id_priv->cm_id.ib);
1854 goto out;
1855 }
1856
1857 route = &id_priv->id.route;
1858 ret = cma_format_hdr(private_data, id_priv->id.ps, route);
1859 if (ret)
1860 goto out;
1861 req.private_data = private_data;
1862
1863 req.primary_path = &route->path_rec[0];
1864 if (route->num_paths == 2)
1865 req.alternate_path = &route->path_rec[1];
1866
1867 req.service_id = cma_get_service_id(id_priv->id.ps,
1868 &route->addr.dst_addr);
1869 req.qp_num = id_priv->qp_num;
9b2e9c0c 1870 req.qp_type = IB_QPT_RC;
e51060f0
SH		 1871 req.starting_psn = id_priv->seq_num;
1872 req.responder_resources = conn_param->responder_resources;
1873 req.initiator_depth = conn_param->initiator_depth;
1874 req.flow_control = conn_param->flow_control;
1875 req.retry_count = conn_param->retry_count;
1876 req.rnr_retry_count = conn_param->rnr_retry_count;
1877 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
1878 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
1879 req.max_cm_retries = CMA_MAX_CM_RETRIES;
1880 req.srq = id_priv->srq ? 1 : 0;
1881
1882 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
1883out:
675a027c
KK		 1884 if (ret && !IS_ERR(id_priv->cm_id.ib)) {
1885 ib_destroy_cm_id(id_priv->cm_id.ib);
1886 id_priv->cm_id.ib = NULL;
1887 }
1888
e51060f0
SH		 1889 kfree(private_data);
1890 return ret;
1891}
1892
07ebafba
TT		 1893static int cma_connect_iw(struct rdma_id_private *id_priv,
1894 struct rdma_conn_param *conn_param)
1895{
1896 struct iw_cm_id *cm_id;
1897 struct sockaddr_in* sin;
1898 int ret;
1899 struct iw_cm_conn_param iw_param;
1900
1901 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
1902 if (IS_ERR(cm_id)) {
1903 ret = PTR_ERR(cm_id);
1904 goto out;
1905 }
1906
1907 id_priv->cm_id.iw = cm_id;
1908
1909 sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr;
1910 cm_id->local_addr = *sin;
1911
1912 sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr;
1913 cm_id->remote_addr = *sin;
1914
1915 ret = cma_modify_qp_rtr(&id_priv->id);
675a027c
KK		 1916 if (ret)
1917 goto out;
07ebafba
TT		 1918
1919 iw_param.ord = conn_param->initiator_depth;
1920 iw_param.ird = conn_param->responder_resources;
1921 iw_param.private_data = conn_param->private_data;
1922 iw_param.private_data_len = conn_param->private_data_len;
1923 if (id_priv->id.qp)
1924 iw_param.qpn = id_priv->qp_num;
1925 else
1926 iw_param.qpn = conn_param->qp_num;
1927 ret = iw_cm_connect(cm_id, &iw_param);
1928out:
675a027c
KK		 1929 if (ret && !IS_ERR(cm_id)) {
1930 iw_destroy_cm_id(cm_id);
1931 id_priv->cm_id.iw = NULL;
1932 }
07ebafba
TT		 1933 return ret;
1934}
1935
e51060f0
SH		 1936int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
1937{
1938 struct rdma_id_private *id_priv;
1939 int ret;
1940
1941 id_priv = container_of(id, struct rdma_id_private, id);
1942 if (!cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_CONNECT))
1943 return -EINVAL;
1944
1945 if (!id->qp) {
1946 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 1947 id_priv->srq = conn_param->srq;
1948 }
1949
07ebafba
TT		 1950 switch (rdma_node_get_transport(id->device->node_type)) {
1951 case RDMA_TRANSPORT_IB:
e51060f0
SH		 1952 ret = cma_connect_ib(id_priv, conn_param);
1953 break;
07ebafba
TT		 1954 case RDMA_TRANSPORT_IWARP:
1955 ret = cma_connect_iw(id_priv, conn_param);
1956 break;
e51060f0
SH		 1957 default:
1958 ret = -ENOSYS;
1959 break;
1960 }
1961 if (ret)
1962 goto err;
1963
1964 return 0;
1965err:
1966 cma_comp_exch(id_priv, CMA_CONNECT, CMA_ROUTE_RESOLVED);
1967 return ret;
1968}
1969EXPORT_SYMBOL(rdma_connect);
1970
1971static int cma_accept_ib(struct rdma_id_private *id_priv,
1972 struct rdma_conn_param *conn_param)
1973{
1974 struct ib_cm_rep_param rep;
0fe313b0
SH		 1975 struct ib_qp_attr qp_attr;
1976 int qp_attr_mask, ret;
e51060f0 1977
0fe313b0
SH		 1978 if (id_priv->id.qp) {
1979 ret = cma_modify_qp_rtr(&id_priv->id);
1980 if (ret)
1981 goto out;
1982
1983 qp_attr.qp_state = IB_QPS_RTS;
1984 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, &qp_attr,
1985 &qp_attr_mask);
1986 if (ret)
1987 goto out;
1988
1989 qp_attr.max_rd_atomic = conn_param->initiator_depth;
1990 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
1991 if (ret)
1992 goto out;
1993 }
e51060f0
SH		 1994
1995 memset(&rep, 0, sizeof rep);
1996 rep.qp_num = id_priv->qp_num;
1997 rep.starting_psn = id_priv->seq_num;
1998 rep.private_data = conn_param->private_data;
1999 rep.private_data_len = conn_param->private_data_len;
2000 rep.responder_resources = conn_param->responder_resources;
2001 rep.initiator_depth = conn_param->initiator_depth;
2002 rep.target_ack_delay = CMA_CM_RESPONSE_TIMEOUT;
2003 rep.failover_accepted = 0;
2004 rep.flow_control = conn_param->flow_control;
2005 rep.rnr_retry_count = conn_param->rnr_retry_count;
2006 rep.srq = id_priv->srq ? 1 : 0;
2007
0fe313b0
SH		 2008 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
2009out:
2010 return ret;
e51060f0
SH		 2011}
2012
07ebafba
TT		 2013static int cma_accept_iw(struct rdma_id_private *id_priv,
2014 struct rdma_conn_param *conn_param)
2015{
2016 struct iw_cm_conn_param iw_param;
2017 int ret;
2018
2019 ret = cma_modify_qp_rtr(&id_priv->id);
2020 if (ret)
2021 return ret;
2022
2023 iw_param.ord = conn_param->initiator_depth;
2024 iw_param.ird = conn_param->responder_resources;
2025 iw_param.private_data = conn_param->private_data;
2026 iw_param.private_data_len = conn_param->private_data_len;
2027 if (id_priv->id.qp) {
2028 iw_param.qpn = id_priv->qp_num;
2029 } else
2030 iw_param.qpn = conn_param->qp_num;
2031
2032 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
2033}
2034
e51060f0
SH		 2035int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2036{
2037 struct rdma_id_private *id_priv;
2038 int ret;
2039
2040 id_priv = container_of(id, struct rdma_id_private, id);
2041 if (!cma_comp(id_priv, CMA_CONNECT))
2042 return -EINVAL;
2043
2044 if (!id->qp && conn_param) {
2045 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 2046 id_priv->srq = conn_param->srq;
2047 }
2048
07ebafba
TT		 2049 switch (rdma_node_get_transport(id->device->node_type)) {
2050 case RDMA_TRANSPORT_IB:
e51060f0
SH		 2051 if (conn_param)
2052 ret = cma_accept_ib(id_priv, conn_param);
2053 else
2054 ret = cma_rep_recv(id_priv);
2055 break;
07ebafba
TT		 2056 case RDMA_TRANSPORT_IWARP:
2057 ret = cma_accept_iw(id_priv, conn_param);
2058 break;
e51060f0
SH		 2059 default:
2060 ret = -ENOSYS;
2061 break;
2062 }
2063
2064 if (ret)
2065 goto reject;
2066
2067 return 0;
2068reject:
2069 cma_modify_qp_err(id);
2070 rdma_reject(id, NULL, 0);
2071 return ret;
2072}
2073EXPORT_SYMBOL(rdma_accept);
2074
0fe313b0
SH		 2075int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
2076{
2077 struct rdma_id_private *id_priv;
2078 int ret;
2079
2080 id_priv = container_of(id, struct rdma_id_private, id);
2081 if (!cma_comp(id_priv, CMA_CONNECT))
2082 return -EINVAL;
2083
2084 switch (id->device->node_type) {
2085 case RDMA_NODE_IB_CA:
2086 ret = ib_cm_notify(id_priv->cm_id.ib, event);
2087 break;
2088 default:
2089 ret = 0;
2090 break;
2091 }
2092 return ret;
2093}
2094EXPORT_SYMBOL(rdma_notify);
2095
e51060f0
SH		 2096int rdma_reject(struct rdma_cm_id *id, const void *private_data,
2097 u8 private_data_len)
2098{
2099 struct rdma_id_private *id_priv;
2100 int ret;
2101
2102 id_priv = container_of(id, struct rdma_id_private, id);
2103 if (!cma_comp(id_priv, CMA_CONNECT))
2104 return -EINVAL;
2105
07ebafba
TT		 2106 switch (rdma_node_get_transport(id->device->node_type)) {
2107 case RDMA_TRANSPORT_IB:
e51060f0
SH		 2108 ret = ib_send_cm_rej(id_priv->cm_id.ib,
2109 IB_CM_REJ_CONSUMER_DEFINED, NULL, 0,
2110 private_data, private_data_len);
2111 break;
07ebafba
TT		 2112 case RDMA_TRANSPORT_IWARP:
2113 ret = iw_cm_reject(id_priv->cm_id.iw,
2114 private_data, private_data_len);
2115 break;
e51060f0
SH		 2116 default:
2117 ret = -ENOSYS;
2118 break;
2119 }
2120 return ret;
2121}
2122EXPORT_SYMBOL(rdma_reject);
2123
2124int rdma_disconnect(struct rdma_cm_id *id)
2125{
2126 struct rdma_id_private *id_priv;
2127 int ret;
2128
2129 id_priv = container_of(id, struct rdma_id_private, id);
2130 if (!cma_comp(id_priv, CMA_CONNECT) &&
2131 !cma_comp(id_priv, CMA_DISCONNECT))
2132 return -EINVAL;
2133
07ebafba
TT		 2134 switch (rdma_node_get_transport(id->device->node_type)) {
2135 case RDMA_TRANSPORT_IB:
2136 ret = cma_modify_qp_err(id);
2137 if (ret)
2138 goto out;
e51060f0
SH		 2139 /* Initiate or respond to a disconnect. */
2140 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
2141 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
2142 break;
07ebafba
TT		 2143 case RDMA_TRANSPORT_IWARP:
2144 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
2145 break;
e51060f0 2146 default:
07ebafba 2147 ret = -EINVAL;
e51060f0
SH		 2148 break;
2149 }
2150out:
2151 return ret;
2152}
2153EXPORT_SYMBOL(rdma_disconnect);
2154
2155static void cma_add_one(struct ib_device *device)
2156{
2157 struct cma_device *cma_dev;
2158 struct rdma_id_private *id_priv;
2159
2160 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
2161 if (!cma_dev)
2162 return;
2163
2164 cma_dev->device = device;
2165 cma_dev->node_guid = device->node_guid;
e51060f0
SH		 2166
2167 init_completion(&cma_dev->comp);
2168 atomic_set(&cma_dev->refcount, 1);
2169 INIT_LIST_HEAD(&cma_dev->id_list);
2170 ib_set_client_data(device, &cma_client, cma_dev);
2171
2172 mutex_lock(&lock);
2173 list_add_tail(&cma_dev->list, &dev_list);
2174 list_for_each_entry(id_priv, &listen_any_list, list)
2175 cma_listen_on_dev(id_priv, cma_dev);
2176 mutex_unlock(&lock);
e51060f0
SH		 2177}
2178
2179static int cma_remove_id_dev(struct rdma_id_private *id_priv)
2180{
a1b1b61f 2181 struct rdma_cm_event event;
e51060f0
SH		 2182 enum cma_state state;
2183
2184 /* Record that we want to remove the device */
2185 state = cma_exch(id_priv, CMA_DEVICE_REMOVAL);
2186 if (state == CMA_DESTROYING)
2187 return 0;
2188
2189 cma_cancel_operation(id_priv, state);
2190 wait_event(id_priv->wait_remove, !atomic_read(&id_priv->dev_remove));
2191
2192 /* Check for destruction from another callback. */
2193 if (!cma_comp(id_priv, CMA_DEVICE_REMOVAL))
2194 return 0;
2195
a1b1b61f
SH		 2196 memset(&event, 0, sizeof event);
2197 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
2198 return id_priv->id.event_handler(&id_priv->id, &event);
e51060f0
SH		 2199}
2200
2201static void cma_process_remove(struct cma_device *cma_dev)
2202{
e51060f0
SH		 2203 struct rdma_id_private *id_priv;
2204 int ret;
2205
e51060f0
SH		 2206 mutex_lock(&lock);
2207 while (!list_empty(&cma_dev->id_list)) {
2208 id_priv = list_entry(cma_dev->id_list.next,
2209 struct rdma_id_private, list);
2210
2211 if (cma_internal_listen(id_priv)) {
2212 cma_destroy_listen(id_priv);
2213 continue;
2214 }
2215
94de178a 2216 list_del_init(&id_priv->list);
e51060f0
SH		 2217 atomic_inc(&id_priv->refcount);
2218 mutex_unlock(&lock);
2219
2220 ret = cma_remove_id_dev(id_priv);
2221 cma_deref_id(id_priv);
2222 if (ret)
2223 rdma_destroy_id(&id_priv->id);
2224
2225 mutex_lock(&lock);
2226 }
2227 mutex_unlock(&lock);
2228
2229 cma_deref_dev(cma_dev);
2230 wait_for_completion(&cma_dev->comp);
2231}
2232
2233static void cma_remove_one(struct ib_device *device)
2234{
2235 struct cma_device *cma_dev;
2236
2237 cma_dev = ib_get_client_data(device, &cma_client);
2238 if (!cma_dev)
2239 return;
2240
2241 mutex_lock(&lock);
2242 list_del(&cma_dev->list);
2243 mutex_unlock(&lock);
2244
2245 cma_process_remove(cma_dev);
2246 kfree(cma_dev);
2247}
2248
2249static int cma_init(void)
2250{
2251 int ret;
2252
2253 cma_wq = create_singlethread_workqueue("rdma_cm_wq");
2254 if (!cma_wq)
2255 return -ENOMEM;
2256
c1a0b23b 2257 ib_sa_register_client(&sa_client);
7a118df3 2258 rdma_addr_register_client(&addr_client);
c1a0b23b 2259
e51060f0
SH		 2260 ret = ib_register_client(&cma_client);
2261 if (ret)
2262 goto err;
2263 return 0;
2264
2265err:
7a118df3 2266 rdma_addr_unregister_client(&addr_client);
c1a0b23b 2267 ib_sa_unregister_client(&sa_client);
e51060f0
SH		 2268 destroy_workqueue(cma_wq);
2269 return ret;
2270}
2271
2272static void cma_cleanup(void)
2273{
2274 ib_unregister_client(&cma_client);
7a118df3 2275 rdma_addr_unregister_client(&addr_client);
c1a0b23b 2276 ib_sa_unregister_client(&sa_client);
e51060f0
SH		 2277 destroy_workqueue(cma_wq);
2278 idr_destroy(&sdp_ps);
2279 idr_destroy(&tcp_ps);
2280}
2281
2282module_init(cma_init);
2283module_exit(cma_cleanup);
kernel source for telekom puls (alcatel/mediatek)