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IPoIB: Refactor completion handling
[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
65static LIST_HEAD(dev_list);
66static LIST_HEAD(listen_any_list);
67static DEFINE_MUTEX(lock);
68static struct workqueue_struct *cma_wq;
69static DEFINE_IDR(sdp_ps);
70static DEFINE_IDR(tcp_ps);
71
72struct cma_device {
73 struct list_head list;
74 struct ib_device *device;
75 __be64 node_guid;
76 struct completion comp;
77 atomic_t refcount;
78 struct list_head id_list;
79};
80
81enum cma_state {
82 CMA_IDLE,
83 CMA_ADDR_QUERY,
84 CMA_ADDR_RESOLVED,
85 CMA_ROUTE_QUERY,
86 CMA_ROUTE_RESOLVED,
87 CMA_CONNECT,
88 CMA_DISCONNECT,
89 CMA_ADDR_BOUND,
90 CMA_LISTEN,
91 CMA_DEVICE_REMOVAL,
92 CMA_DESTROYING
93};
94
95struct rdma_bind_list {
96 struct idr *ps;
97 struct hlist_head owners;
98 unsigned short port;
99};
100
101/*
102 * Device removal can occur at anytime, so we need extra handling to
103 * serialize notifying the user of device removal with other callbacks.
104 * We do this by disabling removal notification while a callback is in process,
105 * and reporting it after the callback completes.
106 */
107struct rdma_id_private {
108 struct rdma_cm_id id;
109
110 struct rdma_bind_list *bind_list;
111 struct hlist_node node;
112 struct list_head list;
113 struct list_head listen_list;
114 struct cma_device *cma_dev;
115
116 enum cma_state state;
117 spinlock_t lock;
118 struct completion comp;
119 atomic_t refcount;
120 wait_queue_head_t wait_remove;
121 atomic_t dev_remove;
122
123 int backlog;
124 int timeout_ms;
125 struct ib_sa_query *query;
126 int query_id;
127 union {
128 struct ib_cm_id *ib;
07ebafba 129 struct iw_cm_id *iw;
e51060f0
SH		 130 } cm_id;
131
132 u32 seq_num;
133 u32 qp_num;
134 enum ib_qp_type qp_type;
135 u8 srq;
136};
137
138struct cma_work {
139 struct work_struct work;
140 struct rdma_id_private *id;
141 enum cma_state old_state;
142 enum cma_state new_state;
143 struct rdma_cm_event event;
144};
145
146union cma_ip_addr {
147 struct in6_addr ip6;
148 struct {
149 __u32 pad[3];
150 __u32 addr;
151 } ip4;
152};
153
154struct cma_hdr {
155 u8 cma_version;
156 u8 ip_version; /* IP version: 7:4 */
157 __u16 port;
158 union cma_ip_addr src_addr;
159 union cma_ip_addr dst_addr;
160};
161
162struct sdp_hh {
163 u8 bsdh[16];
164 u8 sdp_version; /* Major version: 7:4 */
165 u8 ip_version; /* IP version: 7:4 */
166 u8 sdp_specific1[10];
167 __u16 port;
168 __u16 sdp_specific2;
169 union cma_ip_addr src_addr;
170 union cma_ip_addr dst_addr;
171};
172
173struct sdp_hah {
174 u8 bsdh[16];
175 u8 sdp_version;
176};
177
178#define CMA_VERSION 0x00
179#define SDP_MAJ_VERSION 0x2
180
181static int cma_comp(struct rdma_id_private *id_priv, enum cma_state comp)
182{
183 unsigned long flags;
184 int ret;
185
186 spin_lock_irqsave(&id_priv->lock, flags);
187 ret = (id_priv->state == comp);
188 spin_unlock_irqrestore(&id_priv->lock, flags);
189 return ret;
190}
191
192static int cma_comp_exch(struct rdma_id_private *id_priv,
193 enum cma_state comp, enum cma_state exch)
194{
195 unsigned long flags;
196 int ret;
197
198 spin_lock_irqsave(&id_priv->lock, flags);
199 if ((ret = (id_priv->state == comp)))
200 id_priv->state = exch;
201 spin_unlock_irqrestore(&id_priv->lock, flags);
202 return ret;
203}
204
205static enum cma_state cma_exch(struct rdma_id_private *id_priv,
206 enum cma_state exch)
207{
208 unsigned long flags;
209 enum cma_state old;
210
211 spin_lock_irqsave(&id_priv->lock, flags);
212 old = id_priv->state;
213 id_priv->state = exch;
214 spin_unlock_irqrestore(&id_priv->lock, flags);
215 return old;
216}
217
218static inline u8 cma_get_ip_ver(struct cma_hdr *hdr)
219{
220 return hdr->ip_version >> 4;
221}
222
223static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
224{
225 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
226}
227
228static inline u8 sdp_get_majv(u8 sdp_version)
229{
230 return sdp_version >> 4;
231}
232
233static inline u8 sdp_get_ip_ver(struct sdp_hh *hh)
234{
235 return hh->ip_version >> 4;
236}
237
238static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver)
239{
240 hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF);
241}
242
243static void cma_attach_to_dev(struct rdma_id_private *id_priv,
244 struct cma_device *cma_dev)
245{
246 atomic_inc(&cma_dev->refcount);
247 id_priv->cma_dev = cma_dev;
248 id_priv->id.device = cma_dev->device;
249 list_add_tail(&id_priv->list, &cma_dev->id_list);
250}
251
252static inline void cma_deref_dev(struct cma_device *cma_dev)
253{
254 if (atomic_dec_and_test(&cma_dev->refcount))
255 complete(&cma_dev->comp);
256}
257
258static void cma_detach_from_dev(struct rdma_id_private *id_priv)
259{
260 list_del(&id_priv->list);
261 cma_deref_dev(id_priv->cma_dev);
262 id_priv->cma_dev = NULL;
263}
264
07ebafba 265static int cma_acquire_dev(struct rdma_id_private *id_priv)
e51060f0 266{
07ebafba 267 enum rdma_node_type dev_type = id_priv->id.route.addr.dev_addr.dev_type;
e51060f0 268 struct cma_device *cma_dev;
f0ee3404 269 union ib_gid gid;
e51060f0
SH		 270 int ret = -ENODEV;
271
07ebafba
TT		 272 switch (rdma_node_get_transport(dev_type)) {
273 case RDMA_TRANSPORT_IB:
274 ib_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
275 break;
276 case RDMA_TRANSPORT_IWARP:
277 iw_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
278 break;
279 default:
280 return -ENODEV;
281 }
61a73c70 282
e51060f0 283 list_for_each_entry(cma_dev, &dev_list, list) {
f0ee3404 284 ret = ib_find_cached_gid(cma_dev->device, &gid,
e51060f0
SH		 285 &id_priv->id.port_num, NULL);
286 if (!ret) {
287 cma_attach_to_dev(id_priv, cma_dev);
288 break;
289 }
290 }
e51060f0
SH		 291 return ret;
292}
293
e51060f0
SH		 294static void cma_deref_id(struct rdma_id_private *id_priv)
295{
296 if (atomic_dec_and_test(&id_priv->refcount))
297 complete(&id_priv->comp);
298}
299
300static void cma_release_remove(struct rdma_id_private *id_priv)
301{
302 if (atomic_dec_and_test(&id_priv->dev_remove))
303 wake_up(&id_priv->wait_remove);
304}
305
306struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
307 void *context, enum rdma_port_space ps)
308{
309 struct rdma_id_private *id_priv;
310
311 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
312 if (!id_priv)
313 return ERR_PTR(-ENOMEM);
314
315 id_priv->state = CMA_IDLE;
316 id_priv->id.context = context;
317 id_priv->id.event_handler = event_handler;
318 id_priv->id.ps = ps;
319 spin_lock_init(&id_priv->lock);
320 init_completion(&id_priv->comp);
321 atomic_set(&id_priv->refcount, 1);
322 init_waitqueue_head(&id_priv->wait_remove);
323 atomic_set(&id_priv->dev_remove, 0);
324 INIT_LIST_HEAD(&id_priv->listen_list);
325 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
326
327 return &id_priv->id;
328}
329EXPORT_SYMBOL(rdma_create_id);
330
331static int cma_init_ib_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
332{
333 struct ib_qp_attr qp_attr;
334 struct rdma_dev_addr *dev_addr;
335 int ret;
336
337 dev_addr = &id_priv->id.route.addr.dev_addr;
338 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
339 ib_addr_get_pkey(dev_addr),
340 &qp_attr.pkey_index);
341 if (ret)
342 return ret;
343
344 qp_attr.qp_state = IB_QPS_INIT;
345 qp_attr.qp_access_flags = IB_ACCESS_LOCAL_WRITE;
346 qp_attr.port_num = id_priv->id.port_num;
347 return ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_ACCESS_FLAGS |
348 IB_QP_PKEY_INDEX | IB_QP_PORT);
349}
350
07ebafba
TT		 351static int cma_init_iw_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
352{
353 struct ib_qp_attr qp_attr;
354
355 qp_attr.qp_state = IB_QPS_INIT;
356 qp_attr.qp_access_flags = IB_ACCESS_LOCAL_WRITE;
357
358 return ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_ACCESS_FLAGS);
359}
360
e51060f0
SH		 361int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
362 struct ib_qp_init_attr *qp_init_attr)
363{
364 struct rdma_id_private *id_priv;
365 struct ib_qp *qp;
366 int ret;
367
368 id_priv = container_of(id, struct rdma_id_private, id);
369 if (id->device != pd->device)
370 return -EINVAL;
371
372 qp = ib_create_qp(pd, qp_init_attr);
373 if (IS_ERR(qp))
374 return PTR_ERR(qp);
375
07ebafba
TT		 376 switch (rdma_node_get_transport(id->device->node_type)) {
377 case RDMA_TRANSPORT_IB:
e51060f0
SH		 378 ret = cma_init_ib_qp(id_priv, qp);
379 break;
07ebafba
TT		 380 case RDMA_TRANSPORT_IWARP:
381 ret = cma_init_iw_qp(id_priv, qp);
382 break;
e51060f0
SH		 383 default:
384 ret = -ENOSYS;
385 break;
386 }
387
388 if (ret)
389 goto err;
390
391 id->qp = qp;
392 id_priv->qp_num = qp->qp_num;
393 id_priv->qp_type = qp->qp_type;
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
595static int cma_notify_user(struct rdma_id_private *id_priv,
596 enum rdma_cm_event_type type, int status,
597 void *data, u8 data_len)
598{
599 struct rdma_cm_event event;
600
601 event.event = type;
602 event.status = status;
603 event.private_data = data;
604 event.private_data_len = data_len;
605
606 return id_priv->id.event_handler(&id_priv->id, &event);
607}
608
609static void cma_cancel_route(struct rdma_id_private *id_priv)
610{
07ebafba
TT		 611 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
612 case RDMA_TRANSPORT_IB:
e51060f0
SH		 613 if (id_priv->query)
614 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
615 break;
616 default:
617 break;
618 }
619}
620
621static inline int cma_internal_listen(struct rdma_id_private *id_priv)
622{
623 return (id_priv->state == CMA_LISTEN) && id_priv->cma_dev &&
624 cma_any_addr(&id_priv->id.route.addr.src_addr);
625}
626
627static void cma_destroy_listen(struct rdma_id_private *id_priv)
628{
629 cma_exch(id_priv, CMA_DESTROYING);
630
631 if (id_priv->cma_dev) {
07ebafba
TT		 632 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
633 case RDMA_TRANSPORT_IB:
3cd96564 634 if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib))
e51060f0
SH		 635 ib_destroy_cm_id(id_priv->cm_id.ib);
636 break;
07ebafba
TT		 637 case RDMA_TRANSPORT_IWARP:
638 if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw))
639 iw_destroy_cm_id(id_priv->cm_id.iw);
640 break;
e51060f0
SH		 641 default:
642 break;
643 }
644 cma_detach_from_dev(id_priv);
645 }
646 list_del(&id_priv->listen_list);
647
648 cma_deref_id(id_priv);
649 wait_for_completion(&id_priv->comp);
650
651 kfree(id_priv);
652}
653
654static void cma_cancel_listens(struct rdma_id_private *id_priv)
655{
656 struct rdma_id_private *dev_id_priv;
657
658 mutex_lock(&lock);
659 list_del(&id_priv->list);
660
661 while (!list_empty(&id_priv->listen_list)) {
662 dev_id_priv = list_entry(id_priv->listen_list.next,
663 struct rdma_id_private, listen_list);
664 cma_destroy_listen(dev_id_priv);
665 }
666 mutex_unlock(&lock);
667}
668
669static void cma_cancel_operation(struct rdma_id_private *id_priv,
670 enum cma_state state)
671{
672 switch (state) {
673 case CMA_ADDR_QUERY:
674 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
675 break;
676 case CMA_ROUTE_QUERY:
677 cma_cancel_route(id_priv);
678 break;
679 case CMA_LISTEN:
680 if (cma_any_addr(&id_priv->id.route.addr.src_addr) &&
681 !id_priv->cma_dev)
682 cma_cancel_listens(id_priv);
683 break;
684 default:
685 break;
686 }
687}
688
689static void cma_release_port(struct rdma_id_private *id_priv)
690{
691 struct rdma_bind_list *bind_list = id_priv->bind_list;
692
693 if (!bind_list)
694 return;
695
696 mutex_lock(&lock);
697 hlist_del(&id_priv->node);
698 if (hlist_empty(&bind_list->owners)) {
699 idr_remove(bind_list->ps, bind_list->port);
700 kfree(bind_list);
701 }
702 mutex_unlock(&lock);
703}
704
705void rdma_destroy_id(struct rdma_cm_id *id)
706{
707 struct rdma_id_private *id_priv;
708 enum cma_state state;
709
710 id_priv = container_of(id, struct rdma_id_private, id);
711 state = cma_exch(id_priv, CMA_DESTROYING);
712 cma_cancel_operation(id_priv, state);
713
61a73c70 714 mutex_lock(&lock);
e51060f0 715 if (id_priv->cma_dev) {
61a73c70 716 mutex_unlock(&lock);
07ebafba
TT		 717 switch (rdma_node_get_transport(id->device->node_type)) {
718 case RDMA_TRANSPORT_IB:
3cd96564 719 if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib))
e51060f0
SH		 720 ib_destroy_cm_id(id_priv->cm_id.ib);
721 break;
07ebafba
TT		 722 case RDMA_TRANSPORT_IWARP:
723 if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw))
724 iw_destroy_cm_id(id_priv->cm_id.iw);
725 break;
e51060f0
SH		 726 default:
727 break;
728 }
3cd96564 729 mutex_lock(&lock);
e51060f0 730 cma_detach_from_dev(id_priv);
e51060f0 731 }
61a73c70 732 mutex_unlock(&lock);
e51060f0
SH		 733
734 cma_release_port(id_priv);
735 cma_deref_id(id_priv);
736 wait_for_completion(&id_priv->comp);
737
738 kfree(id_priv->id.route.path_rec);
739 kfree(id_priv);
740}
741EXPORT_SYMBOL(rdma_destroy_id);
742
743static int cma_rep_recv(struct rdma_id_private *id_priv)
744{
745 int ret;
746
747 ret = cma_modify_qp_rtr(&id_priv->id);
748 if (ret)
749 goto reject;
750
751 ret = cma_modify_qp_rts(&id_priv->id);
752 if (ret)
753 goto reject;
754
755 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
756 if (ret)
757 goto reject;
758
759 return 0;
760reject:
761 cma_modify_qp_err(&id_priv->id);
762 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
763 NULL, 0, NULL, 0);
764 return ret;
765}
766
767static int cma_verify_rep(struct rdma_id_private *id_priv, void *data)
768{
769 if (id_priv->id.ps == RDMA_PS_SDP &&
770 sdp_get_majv(((struct sdp_hah *) data)->sdp_version) !=
771 SDP_MAJ_VERSION)
772 return -EINVAL;
773
774 return 0;
775}
776
777static int cma_rtu_recv(struct rdma_id_private *id_priv)
778{
779 int ret;
780
781 ret = cma_modify_qp_rts(&id_priv->id);
782 if (ret)
783 goto reject;
784
785 return 0;
786reject:
787 cma_modify_qp_err(&id_priv->id);
788 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
789 NULL, 0, NULL, 0);
790 return ret;
791}
792
793static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
794{
795 struct rdma_id_private *id_priv = cm_id->context;
796 enum rdma_cm_event_type event;
797 u8 private_data_len = 0;
798 int ret = 0, status = 0;
799
800 atomic_inc(&id_priv->dev_remove);
801 if (!cma_comp(id_priv, CMA_CONNECT))
802 goto out;
803
804 switch (ib_event->event) {
805 case IB_CM_REQ_ERROR:
806 case IB_CM_REP_ERROR:
807 event = RDMA_CM_EVENT_UNREACHABLE;
808 status = -ETIMEDOUT;
809 break;
810 case IB_CM_REP_RECEIVED:
811 status = cma_verify_rep(id_priv, ib_event->private_data);
812 if (status)
813 event = RDMA_CM_EVENT_CONNECT_ERROR;
814 else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) {
815 status = cma_rep_recv(id_priv);
816 event = status ? RDMA_CM_EVENT_CONNECT_ERROR :
817 RDMA_CM_EVENT_ESTABLISHED;
818 } else
819 event = RDMA_CM_EVENT_CONNECT_RESPONSE;
820 private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
821 break;
822 case IB_CM_RTU_RECEIVED:
823 status = cma_rtu_recv(id_priv);
824 event = status ? RDMA_CM_EVENT_CONNECT_ERROR :
825 RDMA_CM_EVENT_ESTABLISHED;
826 break;
827 case IB_CM_DREQ_ERROR:
828 status = -ETIMEDOUT; /* fall through */
829 case IB_CM_DREQ_RECEIVED:
830 case IB_CM_DREP_RECEIVED:
831 if (!cma_comp_exch(id_priv, CMA_CONNECT, CMA_DISCONNECT))
832 goto out;
833 event = RDMA_CM_EVENT_DISCONNECTED;
834 break;
835 case IB_CM_TIMEWAIT_EXIT:
836 case IB_CM_MRA_RECEIVED:
837 /* ignore event */
838 goto out;
839 case IB_CM_REJ_RECEIVED:
840 cma_modify_qp_err(&id_priv->id);
841 status = ib_event->param.rej_rcvd.reason;
842 event = RDMA_CM_EVENT_REJECTED;
74f76fba 843 private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
e51060f0
SH		 844 break;
845 default:
846 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d",
847 ib_event->event);
848 goto out;
849 }
850
851 ret = cma_notify_user(id_priv, event, status, ib_event->private_data,
852 private_data_len);
853 if (ret) {
854 /* Destroy the CM ID by returning a non-zero value. */
855 id_priv->cm_id.ib = NULL;
856 cma_exch(id_priv, CMA_DESTROYING);
857 cma_release_remove(id_priv);
858 rdma_destroy_id(&id_priv->id);
859 return ret;
860 }
861out:
862 cma_release_remove(id_priv);
863 return ret;
864}
865
866static struct rdma_id_private *cma_new_id(struct rdma_cm_id *listen_id,
867 struct ib_cm_event *ib_event)
868{
869 struct rdma_id_private *id_priv;
870 struct rdma_cm_id *id;
871 struct rdma_route *rt;
872 union cma_ip_addr *src, *dst;
873 __u16 port;
874 u8 ip_ver;
875
876 id = rdma_create_id(listen_id->event_handler, listen_id->context,
877 listen_id->ps);
878 if (IS_ERR(id))
879 return NULL;
880
881 rt = &id->route;
882 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
883 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths, GFP_KERNEL);
884 if (!rt->path_rec)
885 goto err;
886
887 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
888 &ip_ver, &port, &src, &dst))
889 goto err;
890
891 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
892 ip_ver, port, src, dst);
893 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
894 if (rt->num_paths == 2)
895 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
896
897 ib_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
898 ib_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
899 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
07ebafba 900 rt->addr.dev_addr.dev_type = RDMA_NODE_IB_CA;
e51060f0
SH		 901
902 id_priv = container_of(id, struct rdma_id_private, id);
903 id_priv->state = CMA_CONNECT;
904 return id_priv;
905err:
906 rdma_destroy_id(id);
907 return NULL;
908}
909
910static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
911{
912 struct rdma_id_private *listen_id, *conn_id;
913 int offset, ret;
914
915 listen_id = cm_id->context;
916 atomic_inc(&listen_id->dev_remove);
917 if (!cma_comp(listen_id, CMA_LISTEN)) {
918 ret = -ECONNABORTED;
919 goto out;
920 }
921
922 conn_id = cma_new_id(&listen_id->id, ib_event);
923 if (!conn_id) {
924 ret = -ENOMEM;
925 goto out;
926 }
927
928 atomic_inc(&conn_id->dev_remove);
61a73c70 929 mutex_lock(&lock);
07ebafba 930 ret = cma_acquire_dev(conn_id);
61a73c70 931 mutex_unlock(&lock);
e51060f0
SH		 932 if (ret) {
933 ret = -ENODEV;
934 cma_release_remove(conn_id);
935 rdma_destroy_id(&conn_id->id);
936 goto out;
937 }
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);
944 ret = cma_notify_user(conn_id, RDMA_CM_EVENT_CONNECT_REQUEST, 0,
945 ib_event->private_data + offset,
946 IB_CM_REQ_PRIVATE_DATA_SIZE - offset);
947 if (ret) {
948 /* Destroy the CM ID by returning a non-zero value. */
949 conn_id->cm_id.ib = NULL;
950 cma_exch(conn_id, CMA_DESTROYING);
951 cma_release_remove(conn_id);
952 rdma_destroy_id(&conn_id->id);
953 }
954out:
955 cma_release_remove(listen_id);
956 return ret;
957}
958
959static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr)
960{
961 return cpu_to_be64(((u64)ps << 16) +
962 be16_to_cpu(((struct sockaddr_in *) addr)->sin_port));
963}
964
965static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr,
966 struct ib_cm_compare_data *compare)
967{
968 struct cma_hdr *cma_data, *cma_mask;
969 struct sdp_hh *sdp_data, *sdp_mask;
970 __u32 ip4_addr;
971 struct in6_addr ip6_addr;
972
973 memset(compare, 0, sizeof *compare);
974 cma_data = (void *) compare->data;
975 cma_mask = (void *) compare->mask;
976 sdp_data = (void *) compare->data;
977 sdp_mask = (void *) compare->mask;
978
979 switch (addr->sa_family) {
980 case AF_INET:
981 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
982 if (ps == RDMA_PS_SDP) {
983 sdp_set_ip_ver(sdp_data, 4);
984 sdp_set_ip_ver(sdp_mask, 0xF);
985 sdp_data->dst_addr.ip4.addr = ip4_addr;
986 sdp_mask->dst_addr.ip4.addr = ~0;
987 } else {
988 cma_set_ip_ver(cma_data, 4);
989 cma_set_ip_ver(cma_mask, 0xF);
990 cma_data->dst_addr.ip4.addr = ip4_addr;
991 cma_mask->dst_addr.ip4.addr = ~0;
992 }
993 break;
994 case AF_INET6:
995 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr;
996 if (ps == RDMA_PS_SDP) {
997 sdp_set_ip_ver(sdp_data, 6);
998 sdp_set_ip_ver(sdp_mask, 0xF);
999 sdp_data->dst_addr.ip6 = ip6_addr;
1000 memset(&sdp_mask->dst_addr.ip6, 0xFF,
1001 sizeof sdp_mask->dst_addr.ip6);
1002 } else {
1003 cma_set_ip_ver(cma_data, 6);
1004 cma_set_ip_ver(cma_mask, 0xF);
1005 cma_data->dst_addr.ip6 = ip6_addr;
1006 memset(&cma_mask->dst_addr.ip6, 0xFF,
1007 sizeof cma_mask->dst_addr.ip6);
1008 }
1009 break;
1010 default:
1011 break;
1012 }
1013}
1014
07ebafba
TT		 1015static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1016{
1017 struct rdma_id_private *id_priv = iw_id->context;
1018 enum rdma_cm_event_type event = 0;
1019 struct sockaddr_in *sin;
1020 int ret = 0;
1021
1022 atomic_inc(&id_priv->dev_remove);
1023
1024 switch (iw_event->event) {
1025 case IW_CM_EVENT_CLOSE:
1026 event = RDMA_CM_EVENT_DISCONNECTED;
1027 break;
1028 case IW_CM_EVENT_CONNECT_REPLY:
1029 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1030 *sin = iw_event->local_addr;
1031 sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr;
1032 *sin = iw_event->remote_addr;
1033 if (iw_event->status)
1034 event = RDMA_CM_EVENT_REJECTED;
1035 else
1036 event = RDMA_CM_EVENT_ESTABLISHED;
1037 break;
1038 case IW_CM_EVENT_ESTABLISHED:
1039 event = RDMA_CM_EVENT_ESTABLISHED;
1040 break;
1041 default:
1042 BUG_ON(1);
1043 }
1044
1045 ret = cma_notify_user(id_priv, event, iw_event->status,
1046 iw_event->private_data,
1047 iw_event->private_data_len);
1048 if (ret) {
1049 /* Destroy the CM ID by returning a non-zero value. */
1050 id_priv->cm_id.iw = NULL;
1051 cma_exch(id_priv, CMA_DESTROYING);
1052 cma_release_remove(id_priv);
1053 rdma_destroy_id(&id_priv->id);
1054 return ret;
1055 }
1056
1057 cma_release_remove(id_priv);
1058 return ret;
1059}
1060
1061static int iw_conn_req_handler(struct iw_cm_id *cm_id,
1062 struct iw_cm_event *iw_event)
1063{
1064 struct rdma_cm_id *new_cm_id;
1065 struct rdma_id_private *listen_id, *conn_id;
1066 struct sockaddr_in *sin;
1067 struct net_device *dev = NULL;
1068 int ret;
1069
1070 listen_id = cm_id->context;
1071 atomic_inc(&listen_id->dev_remove);
1072 if (!cma_comp(listen_id, CMA_LISTEN)) {
1073 ret = -ECONNABORTED;
1074 goto out;
1075 }
1076
1077 /* Create a new RDMA id for the new IW CM ID */
1078 new_cm_id = rdma_create_id(listen_id->id.event_handler,
1079 listen_id->id.context,
1080 RDMA_PS_TCP);
1081 if (!new_cm_id) {
1082 ret = -ENOMEM;
1083 goto out;
1084 }
1085 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
1086 atomic_inc(&conn_id->dev_remove);
1087 conn_id->state = CMA_CONNECT;
1088
1089 dev = ip_dev_find(iw_event->local_addr.sin_addr.s_addr);
1090 if (!dev) {
1091 ret = -EADDRNOTAVAIL;
1092 cma_release_remove(conn_id);
1093 rdma_destroy_id(new_cm_id);
1094 goto out;
1095 }
1096 ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL);
1097 if (ret) {
1098 cma_release_remove(conn_id);
1099 rdma_destroy_id(new_cm_id);
1100 goto out;
1101 }
1102
61a73c70 1103 mutex_lock(&lock);
07ebafba 1104 ret = cma_acquire_dev(conn_id);
61a73c70 1105 mutex_unlock(&lock);
07ebafba
TT		 1106 if (ret) {
1107 cma_release_remove(conn_id);
1108 rdma_destroy_id(new_cm_id);
1109 goto out;
1110 }
1111
1112 conn_id->cm_id.iw = cm_id;
1113 cm_id->context = conn_id;
1114 cm_id->cm_handler = cma_iw_handler;
1115
1116 sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr;
1117 *sin = iw_event->local_addr;
1118 sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr;
1119 *sin = iw_event->remote_addr;
1120
1121 ret = cma_notify_user(conn_id, RDMA_CM_EVENT_CONNECT_REQUEST, 0,
1122 iw_event->private_data,
1123 iw_event->private_data_len);
1124 if (ret) {
1125 /* User wants to destroy the CM ID */
1126 conn_id->cm_id.iw = NULL;
1127 cma_exch(conn_id, CMA_DESTROYING);
1128 cma_release_remove(conn_id);
1129 rdma_destroy_id(&conn_id->id);
1130 }
1131
1132out:
1133 if (dev)
1134 dev_put(dev);
1135 cma_release_remove(listen_id);
1136 return ret;
1137}
1138
e51060f0
SH		 1139static int cma_ib_listen(struct rdma_id_private *id_priv)
1140{
1141 struct ib_cm_compare_data compare_data;
1142 struct sockaddr *addr;
1143 __be64 svc_id;
1144 int ret;
1145
1146 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_req_handler,
1147 id_priv);
1148 if (IS_ERR(id_priv->cm_id.ib))
1149 return PTR_ERR(id_priv->cm_id.ib);
1150
1151 addr = &id_priv->id.route.addr.src_addr;
1152 svc_id = cma_get_service_id(id_priv->id.ps, addr);
1153 if (cma_any_addr(addr))
1154 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL);
1155 else {
1156 cma_set_compare_data(id_priv->id.ps, addr, &compare_data);
1157 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data);
1158 }
1159
1160 if (ret) {
1161 ib_destroy_cm_id(id_priv->cm_id.ib);
1162 id_priv->cm_id.ib = NULL;
1163 }
1164
1165 return ret;
1166}
1167
07ebafba
TT		 1168static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
1169{
1170 int ret;
1171 struct sockaddr_in *sin;
1172
1173 id_priv->cm_id.iw = iw_create_cm_id(id_priv->id.device,
1174 iw_conn_req_handler,
1175 id_priv);
1176 if (IS_ERR(id_priv->cm_id.iw))
1177 return PTR_ERR(id_priv->cm_id.iw);
1178
1179 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1180 id_priv->cm_id.iw->local_addr = *sin;
1181
1182 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
1183
1184 if (ret) {
1185 iw_destroy_cm_id(id_priv->cm_id.iw);
1186 id_priv->cm_id.iw = NULL;
1187 }
1188
1189 return ret;
1190}
1191
e51060f0
SH		 1192static int cma_listen_handler(struct rdma_cm_id *id,
1193 struct rdma_cm_event *event)
1194{
1195 struct rdma_id_private *id_priv = id->context;
1196
1197 id->context = id_priv->id.context;
1198 id->event_handler = id_priv->id.event_handler;
1199 return id_priv->id.event_handler(id, event);
1200}
1201
1202static void cma_listen_on_dev(struct rdma_id_private *id_priv,
1203 struct cma_device *cma_dev)
1204{
1205 struct rdma_id_private *dev_id_priv;
1206 struct rdma_cm_id *id;
1207 int ret;
1208
1209 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps);
1210 if (IS_ERR(id))
1211 return;
1212
1213 dev_id_priv = container_of(id, struct rdma_id_private, id);
1214
1215 dev_id_priv->state = CMA_ADDR_BOUND;
1216 memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr,
1217 ip_addr_size(&id_priv->id.route.addr.src_addr));
1218
1219 cma_attach_to_dev(dev_id_priv, cma_dev);
1220 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
1221
1222 ret = rdma_listen(id, id_priv->backlog);
1223 if (ret)
1224 goto err;
1225
1226 return;
1227err:
1228 cma_destroy_listen(dev_id_priv);
1229}
1230
1231static void cma_listen_on_all(struct rdma_id_private *id_priv)
1232{
1233 struct cma_device *cma_dev;
1234
1235 mutex_lock(&lock);
1236 list_add_tail(&id_priv->list, &listen_any_list);
1237 list_for_each_entry(cma_dev, &dev_list, list)
1238 cma_listen_on_dev(id_priv, cma_dev);
1239 mutex_unlock(&lock);
1240}
1241
1242static int cma_bind_any(struct rdma_cm_id *id, sa_family_t af)
1243{
1244 struct sockaddr_in addr_in;
1245
1246 memset(&addr_in, 0, sizeof addr_in);
1247 addr_in.sin_family = af;
1248 return rdma_bind_addr(id, (struct sockaddr *) &addr_in);
1249}
1250
1251int rdma_listen(struct rdma_cm_id *id, int backlog)
1252{
1253 struct rdma_id_private *id_priv;
1254 int ret;
1255
1256 id_priv = container_of(id, struct rdma_id_private, id);
1257 if (id_priv->state == CMA_IDLE) {
1258 ret = cma_bind_any(id, AF_INET);
1259 if (ret)
1260 return ret;
1261 }
1262
1263 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_LISTEN))
1264 return -EINVAL;
1265
1266 id_priv->backlog = backlog;
1267 if (id->device) {
07ebafba
TT		 1268 switch (rdma_node_get_transport(id->device->node_type)) {
1269 case RDMA_TRANSPORT_IB:
e51060f0
SH		 1270 ret = cma_ib_listen(id_priv);
1271 if (ret)
1272 goto err;
1273 break;
07ebafba
TT		 1274 case RDMA_TRANSPORT_IWARP:
1275 ret = cma_iw_listen(id_priv, backlog);
1276 if (ret)
1277 goto err;
1278 break;
e51060f0
SH		 1279 default:
1280 ret = -ENOSYS;
1281 goto err;
1282 }
1283 } else
1284 cma_listen_on_all(id_priv);
1285
1286 return 0;
1287err:
1288 id_priv->backlog = 0;
1289 cma_comp_exch(id_priv, CMA_LISTEN, CMA_ADDR_BOUND);
1290 return ret;
1291}
1292EXPORT_SYMBOL(rdma_listen);
1293
1294static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
1295 void *context)
1296{
1297 struct cma_work *work = context;
1298 struct rdma_route *route;
1299
1300 route = &work->id->id.route;
1301
1302 if (!status) {
1303 route->num_paths = 1;
1304 *route->path_rec = *path_rec;
1305 } else {
1306 work->old_state = CMA_ROUTE_QUERY;
1307 work->new_state = CMA_ADDR_RESOLVED;
1308 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
1309 }
1310
1311 queue_work(cma_wq, &work->work);
1312}
1313
1314static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
1315 struct cma_work *work)
1316{
1317 struct rdma_dev_addr *addr = &id_priv->id.route.addr.dev_addr;
1318 struct ib_sa_path_rec path_rec;
1319
1320 memset(&path_rec, 0, sizeof path_rec);
f0ee3404
MT		 1321 ib_addr_get_sgid(addr, &path_rec.sgid);
1322 ib_addr_get_dgid(addr, &path_rec.dgid);
e51060f0
SH		 1323 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(addr));
1324 path_rec.numb_path = 1;
1325
1326 id_priv->query_id = ib_sa_path_rec_get(id_priv->id.device,
1327 id_priv->id.port_num, &path_rec,
1328 IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
1329 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH,
1330 timeout_ms, GFP_KERNEL,
1331 cma_query_handler, work, &id_priv->query);
1332
1333 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
1334}
1335
1336static void cma_work_handler(void *data)
1337{
1338 struct cma_work *work = data;
1339 struct rdma_id_private *id_priv = work->id;
1340 int destroy = 0;
1341
1342 atomic_inc(&id_priv->dev_remove);
1343 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
1344 goto out;
1345
1346 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1347 cma_exch(id_priv, CMA_DESTROYING);
1348 destroy = 1;
1349 }
1350out:
1351 cma_release_remove(id_priv);
1352 cma_deref_id(id_priv);
1353 if (destroy)
1354 rdma_destroy_id(&id_priv->id);
1355 kfree(work);
1356}
1357
1358static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
1359{
1360 struct rdma_route *route = &id_priv->id.route;
1361 struct cma_work *work;
1362 int ret;
1363
1364 work = kzalloc(sizeof *work, GFP_KERNEL);
1365 if (!work)
1366 return -ENOMEM;
1367
1368 work->id = id_priv;
1369 INIT_WORK(&work->work, cma_work_handler, work);
1370 work->old_state = CMA_ROUTE_QUERY;
1371 work->new_state = CMA_ROUTE_RESOLVED;
1372 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1373
1374 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
1375 if (!route->path_rec) {
1376 ret = -ENOMEM;
1377 goto err1;
1378 }
1379
1380 ret = cma_query_ib_route(id_priv, timeout_ms, work);
1381 if (ret)
1382 goto err2;
1383
1384 return 0;
1385err2:
1386 kfree(route->path_rec);
1387 route->path_rec = NULL;
1388err1:
1389 kfree(work);
1390 return ret;
1391}
1392
1393int rdma_set_ib_paths(struct rdma_cm_id *id,
1394 struct ib_sa_path_rec *path_rec, int num_paths)
1395{
1396 struct rdma_id_private *id_priv;
1397 int ret;
1398
1399 id_priv = container_of(id, struct rdma_id_private, id);
1400 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_RESOLVED))
1401 return -EINVAL;
1402
1403 id->route.path_rec = kmalloc(sizeof *path_rec * num_paths, GFP_KERNEL);
1404 if (!id->route.path_rec) {
1405 ret = -ENOMEM;
1406 goto err;
1407 }
1408
1409 memcpy(id->route.path_rec, path_rec, sizeof *path_rec * num_paths);
1410 return 0;
1411err:
1412 cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_ADDR_RESOLVED);
1413 return ret;
1414}
1415EXPORT_SYMBOL(rdma_set_ib_paths);
1416
07ebafba
TT		 1417static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
1418{
1419 struct cma_work *work;
1420
1421 work = kzalloc(sizeof *work, GFP_KERNEL);
1422 if (!work)
1423 return -ENOMEM;
1424
1425 work->id = id_priv;
1426 INIT_WORK(&work->work, cma_work_handler, work);
1427 work->old_state = CMA_ROUTE_QUERY;
1428 work->new_state = CMA_ROUTE_RESOLVED;
1429 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1430 queue_work(cma_wq, &work->work);
1431 return 0;
1432}
1433
e51060f0
SH		 1434int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
1435{
1436 struct rdma_id_private *id_priv;
1437 int ret;
1438
1439 id_priv = container_of(id, struct rdma_id_private, id);
1440 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_QUERY))
1441 return -EINVAL;
1442
1443 atomic_inc(&id_priv->refcount);
07ebafba
TT		 1444 switch (rdma_node_get_transport(id->device->node_type)) {
1445 case RDMA_TRANSPORT_IB:
e51060f0
SH		 1446 ret = cma_resolve_ib_route(id_priv, timeout_ms);
1447 break;
07ebafba
TT		 1448 case RDMA_TRANSPORT_IWARP:
1449 ret = cma_resolve_iw_route(id_priv, timeout_ms);
1450 break;
e51060f0
SH		 1451 default:
1452 ret = -ENOSYS;
1453 break;
1454 }
1455 if (ret)
1456 goto err;
1457
1458 return 0;
1459err:
1460 cma_comp_exch(id_priv, CMA_ROUTE_QUERY, CMA_ADDR_RESOLVED);
1461 cma_deref_id(id_priv);
1462 return ret;
1463}
1464EXPORT_SYMBOL(rdma_resolve_route);
1465
1466static int cma_bind_loopback(struct rdma_id_private *id_priv)
1467{
1468 struct cma_device *cma_dev;
1469 struct ib_port_attr port_attr;
f0ee3404 1470 union ib_gid gid;
e51060f0
SH		 1471 u16 pkey;
1472 int ret;
1473 u8 p;
1474
1475 mutex_lock(&lock);
1476 list_for_each_entry(cma_dev, &dev_list, list)
1477 for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p)
1478 if (!ib_query_port (cma_dev->device, p, &port_attr) &&
1479 port_attr.state == IB_PORT_ACTIVE)
1480 goto port_found;
1481
1482 if (!list_empty(&dev_list)) {
1483 p = 1;
1484 cma_dev = list_entry(dev_list.next, struct cma_device, list);
1485 } else {
1486 ret = -ENODEV;
1487 goto out;
1488 }
1489
1490port_found:
f0ee3404 1491 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid);
e51060f0
SH		 1492 if (ret)
1493 goto out;
1494
1495 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
1496 if (ret)
1497 goto out;
1498
f0ee3404 1499 ib_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0
SH		 1500 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
1501 id_priv->id.port_num = p;
1502 cma_attach_to_dev(id_priv, cma_dev);
1503out:
1504 mutex_unlock(&lock);
1505 return ret;
1506}
1507
1508static void addr_handler(int status, struct sockaddr *src_addr,
1509 struct rdma_dev_addr *dev_addr, void *context)
1510{
1511 struct rdma_id_private *id_priv = context;
1512 enum rdma_cm_event_type event;
1513
1514 atomic_inc(&id_priv->dev_remove);
61a73c70
SH		 1515
1516 /*
1517 * Grab mutex to block rdma_destroy_id() from removing the device while
1518 * we're trying to acquire it.
1519 */
1520 mutex_lock(&lock);
1521 if (!cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_RESOLVED)) {
1522 mutex_unlock(&lock);
1523 goto out;
1524 }
1525
1526 if (!status && !id_priv->cma_dev)
e51060f0 1527 status = cma_acquire_dev(id_priv);
61a73c70 1528 mutex_unlock(&lock);
e51060f0
SH		 1529
1530 if (status) {
61a73c70 1531 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ADDR_BOUND))
e51060f0
SH		 1532 goto out;
1533 event = RDMA_CM_EVENT_ADDR_ERROR;
1534 } else {
e51060f0
SH		 1535 memcpy(&id_priv->id.route.addr.src_addr, src_addr,
1536 ip_addr_size(src_addr));
1537 event = RDMA_CM_EVENT_ADDR_RESOLVED;
1538 }
1539
1540 if (cma_notify_user(id_priv, event, status, NULL, 0)) {
1541 cma_exch(id_priv, CMA_DESTROYING);
1542 cma_release_remove(id_priv);
1543 cma_deref_id(id_priv);
1544 rdma_destroy_id(&id_priv->id);
1545 return;
1546 }
1547out:
1548 cma_release_remove(id_priv);
1549 cma_deref_id(id_priv);
1550}
1551
1552static int cma_resolve_loopback(struct rdma_id_private *id_priv)
1553{
1554 struct cma_work *work;
1555 struct sockaddr_in *src_in, *dst_in;
f0ee3404 1556 union ib_gid gid;
e51060f0
SH		 1557 int ret;
1558
1559 work = kzalloc(sizeof *work, GFP_KERNEL);
1560 if (!work)
1561 return -ENOMEM;
1562
1563 if (!id_priv->cma_dev) {
1564 ret = cma_bind_loopback(id_priv);
1565 if (ret)
1566 goto err;
1567 }
1568
f0ee3404
MT		 1569 ib_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
1570 ib_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0
SH		 1571
1572 if (cma_zero_addr(&id_priv->id.route.addr.src_addr)) {
1573 src_in = (struct sockaddr_in *)&id_priv->id.route.addr.src_addr;
1574 dst_in = (struct sockaddr_in *)&id_priv->id.route.addr.dst_addr;
1575 src_in->sin_family = dst_in->sin_family;
1576 src_in->sin_addr.s_addr = dst_in->sin_addr.s_addr;
1577 }
1578
1579 work->id = id_priv;
1580 INIT_WORK(&work->work, cma_work_handler, work);
1581 work->old_state = CMA_ADDR_QUERY;
1582 work->new_state = CMA_ADDR_RESOLVED;
1583 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
1584 queue_work(cma_wq, &work->work);
1585 return 0;
1586err:
1587 kfree(work);
1588 return ret;
1589}
1590
1591static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
1592 struct sockaddr *dst_addr)
1593{
1594 if (src_addr && src_addr->sa_family)
1595 return rdma_bind_addr(id, src_addr);
1596 else
1597 return cma_bind_any(id, dst_addr->sa_family);
1598}
1599
1600int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
1601 struct sockaddr *dst_addr, int timeout_ms)
1602{
1603 struct rdma_id_private *id_priv;
1604 int ret;
1605
1606 id_priv = container_of(id, struct rdma_id_private, id);
1607 if (id_priv->state == CMA_IDLE) {
1608 ret = cma_bind_addr(id, src_addr, dst_addr);
1609 if (ret)
1610 return ret;
1611 }
1612
1613 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_ADDR_QUERY))
1614 return -EINVAL;
1615
1616 atomic_inc(&id_priv->refcount);
1617 memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr));
1618 if (cma_any_addr(dst_addr))
1619 ret = cma_resolve_loopback(id_priv);
1620 else
1621 ret = rdma_resolve_ip(&id->route.addr.src_addr, dst_addr,
1622 &id->route.addr.dev_addr,
1623 timeout_ms, addr_handler, id_priv);
1624 if (ret)
1625 goto err;
1626
1627 return 0;
1628err:
1629 cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_BOUND);
1630 cma_deref_id(id_priv);
1631 return ret;
1632}
1633EXPORT_SYMBOL(rdma_resolve_addr);
1634
1635static void cma_bind_port(struct rdma_bind_list *bind_list,
1636 struct rdma_id_private *id_priv)
1637{
1638 struct sockaddr_in *sin;
1639
1640 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1641 sin->sin_port = htons(bind_list->port);
1642 id_priv->bind_list = bind_list;
1643 hlist_add_head(&id_priv->node, &bind_list->owners);
1644}
1645
1646static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv,
1647 unsigned short snum)
1648{
1649 struct rdma_bind_list *bind_list;
1650 int port, start, ret;
1651
1652 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
1653 if (!bind_list)
1654 return -ENOMEM;
1655
1656 start = snum ? snum : sysctl_local_port_range[0];
1657
1658 do {
1659 ret = idr_get_new_above(ps, bind_list, start, &port);
1660 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL));
1661
1662 if (ret)
1663 goto err;
1664
1665 if ((snum && port != snum) ||
1666 (!snum && port > sysctl_local_port_range[1])) {
1667 idr_remove(ps, port);
1668 ret = -EADDRNOTAVAIL;
1669 goto err;
1670 }
1671
1672 bind_list->ps = ps;
1673 bind_list->port = (unsigned short) port;
1674 cma_bind_port(bind_list, id_priv);
1675 return 0;
1676err:
1677 kfree(bind_list);
1678 return ret;
1679}
1680
1681static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv)
1682{
1683 struct rdma_id_private *cur_id;
1684 struct sockaddr_in *sin, *cur_sin;
1685 struct rdma_bind_list *bind_list;
1686 struct hlist_node *node;
1687 unsigned short snum;
1688
1689 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1690 snum = ntohs(sin->sin_port);
1691 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
1692 return -EACCES;
1693
1694 bind_list = idr_find(ps, snum);
1695 if (!bind_list)
1696 return cma_alloc_port(ps, id_priv, snum);
1697
1698 /*
1699 * We don't support binding to any address if anyone is bound to
1700 * a specific address on the same port.
1701 */
1702 if (cma_any_addr(&id_priv->id.route.addr.src_addr))
1703 return -EADDRNOTAVAIL;
1704
1705 hlist_for_each_entry(cur_id, node, &bind_list->owners, node) {
1706 if (cma_any_addr(&cur_id->id.route.addr.src_addr))
1707 return -EADDRNOTAVAIL;
3cd96564 1708
e51060f0
SH		 1709 cur_sin = (struct sockaddr_in *) &cur_id->id.route.addr.src_addr;
1710 if (sin->sin_addr.s_addr == cur_sin->sin_addr.s_addr)
1711 return -EADDRINUSE;
1712 }
1713
1714 cma_bind_port(bind_list, id_priv);
1715 return 0;
1716}
1717
1718static int cma_get_port(struct rdma_id_private *id_priv)
1719{
1720 struct idr *ps;
1721 int ret;
1722
1723 switch (id_priv->id.ps) {
1724 case RDMA_PS_SDP:
1725 ps = &sdp_ps;
1726 break;
1727 case RDMA_PS_TCP:
1728 ps = &tcp_ps;
1729 break;
1730 default:
1731 return -EPROTONOSUPPORT;
1732 }
1733
1734 mutex_lock(&lock);
1735 if (cma_any_port(&id_priv->id.route.addr.src_addr))
1736 ret = cma_alloc_port(ps, id_priv, 0);
1737 else
1738 ret = cma_use_port(ps, id_priv);
1739 mutex_unlock(&lock);
1740
1741 return ret;
1742}
1743
1744int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
1745{
1746 struct rdma_id_private *id_priv;
1747 int ret;
1748
1749 if (addr->sa_family != AF_INET)
1750 return -EAFNOSUPPORT;
1751
1752 id_priv = container_of(id, struct rdma_id_private, id);
1753 if (!cma_comp_exch(id_priv, CMA_IDLE, CMA_ADDR_BOUND))
1754 return -EINVAL;
1755
1756 if (!cma_any_addr(addr)) {
1757 ret = rdma_translate_ip(addr, &id->route.addr.dev_addr);
61a73c70
SH		 1758 if (!ret) {
1759 mutex_lock(&lock);
e51060f0 1760 ret = cma_acquire_dev(id_priv);
61a73c70
SH		 1761 mutex_unlock(&lock);
1762 }
e51060f0
SH		 1763 if (ret)
1764 goto err;
1765 }
1766
1767 memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr));
1768 ret = cma_get_port(id_priv);
1769 if (ret)
1770 goto err;
1771
1772 return 0;
1773err:
1774 cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_IDLE);
1775 return ret;
1776}
1777EXPORT_SYMBOL(rdma_bind_addr);
1778
1779static int cma_format_hdr(void *hdr, enum rdma_port_space ps,
1780 struct rdma_route *route)
1781{
1782 struct sockaddr_in *src4, *dst4;
1783 struct cma_hdr *cma_hdr;
1784 struct sdp_hh *sdp_hdr;
1785
1786 src4 = (struct sockaddr_in *) &route->addr.src_addr;
1787 dst4 = (struct sockaddr_in *) &route->addr.dst_addr;
1788
1789 switch (ps) {
1790 case RDMA_PS_SDP:
1791 sdp_hdr = hdr;
1792 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
1793 return -EINVAL;
1794 sdp_set_ip_ver(sdp_hdr, 4);
1795 sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
1796 sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
1797 sdp_hdr->port = src4->sin_port;
1798 break;
1799 default:
1800 cma_hdr = hdr;
1801 cma_hdr->cma_version = CMA_VERSION;
1802 cma_set_ip_ver(cma_hdr, 4);
1803 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
1804 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
1805 cma_hdr->port = src4->sin_port;
1806 break;
1807 }
1808 return 0;
1809}
1810
1811static int cma_connect_ib(struct rdma_id_private *id_priv,
1812 struct rdma_conn_param *conn_param)
1813{
1814 struct ib_cm_req_param req;
1815 struct rdma_route *route;
1816 void *private_data;
1817 int offset, ret;
1818
1819 memset(&req, 0, sizeof req);
1820 offset = cma_user_data_offset(id_priv->id.ps);
1821 req.private_data_len = offset + conn_param->private_data_len;
1822 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
1823 if (!private_data)
1824 return -ENOMEM;
1825
1826 if (conn_param->private_data && conn_param->private_data_len)
1827 memcpy(private_data + offset, conn_param->private_data,
1828 conn_param->private_data_len);
1829
1830 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_ib_handler,
1831 id_priv);
1832 if (IS_ERR(id_priv->cm_id.ib)) {
1833 ret = PTR_ERR(id_priv->cm_id.ib);
1834 goto out;
1835 }
1836
1837 route = &id_priv->id.route;
1838 ret = cma_format_hdr(private_data, id_priv->id.ps, route);
1839 if (ret)
1840 goto out;
1841 req.private_data = private_data;
1842
1843 req.primary_path = &route->path_rec[0];
1844 if (route->num_paths == 2)
1845 req.alternate_path = &route->path_rec[1];
1846
1847 req.service_id = cma_get_service_id(id_priv->id.ps,
1848 &route->addr.dst_addr);
1849 req.qp_num = id_priv->qp_num;
1850 req.qp_type = id_priv->qp_type;
1851 req.starting_psn = id_priv->seq_num;
1852 req.responder_resources = conn_param->responder_resources;
1853 req.initiator_depth = conn_param->initiator_depth;
1854 req.flow_control = conn_param->flow_control;
1855 req.retry_count = conn_param->retry_count;
1856 req.rnr_retry_count = conn_param->rnr_retry_count;
1857 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
1858 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
1859 req.max_cm_retries = CMA_MAX_CM_RETRIES;
1860 req.srq = id_priv->srq ? 1 : 0;
1861
1862 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
1863out:
1864 kfree(private_data);
1865 return ret;
1866}
1867
07ebafba
TT		 1868static int cma_connect_iw(struct rdma_id_private *id_priv,
1869 struct rdma_conn_param *conn_param)
1870{
1871 struct iw_cm_id *cm_id;
1872 struct sockaddr_in* sin;
1873 int ret;
1874 struct iw_cm_conn_param iw_param;
1875
1876 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
1877 if (IS_ERR(cm_id)) {
1878 ret = PTR_ERR(cm_id);
1879 goto out;
1880 }
1881
1882 id_priv->cm_id.iw = cm_id;
1883
1884 sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr;
1885 cm_id->local_addr = *sin;
1886
1887 sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr;
1888 cm_id->remote_addr = *sin;
1889
1890 ret = cma_modify_qp_rtr(&id_priv->id);
1891 if (ret) {
1892 iw_destroy_cm_id(cm_id);
1893 return ret;
1894 }
1895
1896 iw_param.ord = conn_param->initiator_depth;
1897 iw_param.ird = conn_param->responder_resources;
1898 iw_param.private_data = conn_param->private_data;
1899 iw_param.private_data_len = conn_param->private_data_len;
1900 if (id_priv->id.qp)
1901 iw_param.qpn = id_priv->qp_num;
1902 else
1903 iw_param.qpn = conn_param->qp_num;
1904 ret = iw_cm_connect(cm_id, &iw_param);
1905out:
1906 return ret;
1907}
1908
e51060f0
SH		 1909int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
1910{
1911 struct rdma_id_private *id_priv;
1912 int ret;
1913
1914 id_priv = container_of(id, struct rdma_id_private, id);
1915 if (!cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_CONNECT))
1916 return -EINVAL;
1917
1918 if (!id->qp) {
1919 id_priv->qp_num = conn_param->qp_num;
1920 id_priv->qp_type = conn_param->qp_type;
1921 id_priv->srq = conn_param->srq;
1922 }
1923
07ebafba
TT		 1924 switch (rdma_node_get_transport(id->device->node_type)) {
1925 case RDMA_TRANSPORT_IB:
e51060f0
SH		 1926 ret = cma_connect_ib(id_priv, conn_param);
1927 break;
07ebafba
TT		 1928 case RDMA_TRANSPORT_IWARP:
1929 ret = cma_connect_iw(id_priv, conn_param);
1930 break;
e51060f0
SH		 1931 default:
1932 ret = -ENOSYS;
1933 break;
1934 }
1935 if (ret)
1936 goto err;
1937
1938 return 0;
1939err:
1940 cma_comp_exch(id_priv, CMA_CONNECT, CMA_ROUTE_RESOLVED);
1941 return ret;
1942}
1943EXPORT_SYMBOL(rdma_connect);
1944
1945static int cma_accept_ib(struct rdma_id_private *id_priv,
1946 struct rdma_conn_param *conn_param)
1947{
1948 struct ib_cm_rep_param rep;
1949 int ret;
1950
1951 ret = cma_modify_qp_rtr(&id_priv->id);
1952 if (ret)
1953 return ret;
1954
1955 memset(&rep, 0, sizeof rep);
1956 rep.qp_num = id_priv->qp_num;
1957 rep.starting_psn = id_priv->seq_num;
1958 rep.private_data = conn_param->private_data;
1959 rep.private_data_len = conn_param->private_data_len;
1960 rep.responder_resources = conn_param->responder_resources;
1961 rep.initiator_depth = conn_param->initiator_depth;
1962 rep.target_ack_delay = CMA_CM_RESPONSE_TIMEOUT;
1963 rep.failover_accepted = 0;
1964 rep.flow_control = conn_param->flow_control;
1965 rep.rnr_retry_count = conn_param->rnr_retry_count;
1966 rep.srq = id_priv->srq ? 1 : 0;
1967
1968 return ib_send_cm_rep(id_priv->cm_id.ib, &rep);
1969}
1970
07ebafba
TT		 1971static int cma_accept_iw(struct rdma_id_private *id_priv,
1972 struct rdma_conn_param *conn_param)
1973{
1974 struct iw_cm_conn_param iw_param;
1975 int ret;
1976
1977 ret = cma_modify_qp_rtr(&id_priv->id);
1978 if (ret)
1979 return ret;
1980
1981 iw_param.ord = conn_param->initiator_depth;
1982 iw_param.ird = conn_param->responder_resources;
1983 iw_param.private_data = conn_param->private_data;
1984 iw_param.private_data_len = conn_param->private_data_len;
1985 if (id_priv->id.qp) {
1986 iw_param.qpn = id_priv->qp_num;
1987 } else
1988 iw_param.qpn = conn_param->qp_num;
1989
1990 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
1991}
1992
e51060f0
SH		 1993int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
1994{
1995 struct rdma_id_private *id_priv;
1996 int ret;
1997
1998 id_priv = container_of(id, struct rdma_id_private, id);
1999 if (!cma_comp(id_priv, CMA_CONNECT))
2000 return -EINVAL;
2001
2002 if (!id->qp && conn_param) {
2003 id_priv->qp_num = conn_param->qp_num;
2004 id_priv->qp_type = conn_param->qp_type;
2005 id_priv->srq = conn_param->srq;
2006 }
2007
07ebafba
TT		 2008 switch (rdma_node_get_transport(id->device->node_type)) {
2009 case RDMA_TRANSPORT_IB:
e51060f0
SH		 2010 if (conn_param)
2011 ret = cma_accept_ib(id_priv, conn_param);
2012 else
2013 ret = cma_rep_recv(id_priv);
2014 break;
07ebafba
TT		 2015 case RDMA_TRANSPORT_IWARP:
2016 ret = cma_accept_iw(id_priv, conn_param);
2017 break;
e51060f0
SH		 2018 default:
2019 ret = -ENOSYS;
2020 break;
2021 }
2022
2023 if (ret)
2024 goto reject;
2025
2026 return 0;
2027reject:
2028 cma_modify_qp_err(id);
2029 rdma_reject(id, NULL, 0);
2030 return ret;
2031}
2032EXPORT_SYMBOL(rdma_accept);
2033
2034int rdma_reject(struct rdma_cm_id *id, const void *private_data,
2035 u8 private_data_len)
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
07ebafba
TT		 2044 switch (rdma_node_get_transport(id->device->node_type)) {
2045 case RDMA_TRANSPORT_IB:
e51060f0
SH		 2046 ret = ib_send_cm_rej(id_priv->cm_id.ib,
2047 IB_CM_REJ_CONSUMER_DEFINED, NULL, 0,
2048 private_data, private_data_len);
2049 break;
07ebafba
TT		 2050 case RDMA_TRANSPORT_IWARP:
2051 ret = iw_cm_reject(id_priv->cm_id.iw,
2052 private_data, private_data_len);
2053 break;
e51060f0
SH		 2054 default:
2055 ret = -ENOSYS;
2056 break;
2057 }
2058 return ret;
2059}
2060EXPORT_SYMBOL(rdma_reject);
2061
2062int rdma_disconnect(struct rdma_cm_id *id)
2063{
2064 struct rdma_id_private *id_priv;
2065 int ret;
2066
2067 id_priv = container_of(id, struct rdma_id_private, id);
2068 if (!cma_comp(id_priv, CMA_CONNECT) &&
2069 !cma_comp(id_priv, CMA_DISCONNECT))
2070 return -EINVAL;
2071
07ebafba
TT		 2072 switch (rdma_node_get_transport(id->device->node_type)) {
2073 case RDMA_TRANSPORT_IB:
2074 ret = cma_modify_qp_err(id);
2075 if (ret)
2076 goto out;
e51060f0
SH		 2077 /* Initiate or respond to a disconnect. */
2078 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
2079 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
2080 break;
07ebafba
TT		 2081 case RDMA_TRANSPORT_IWARP:
2082 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
2083 break;
e51060f0 2084 default:
07ebafba 2085 ret = -EINVAL;
e51060f0
SH		 2086 break;
2087 }
2088out:
2089 return ret;
2090}
2091EXPORT_SYMBOL(rdma_disconnect);
2092
2093static void cma_add_one(struct ib_device *device)
2094{
2095 struct cma_device *cma_dev;
2096 struct rdma_id_private *id_priv;
2097
2098 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
2099 if (!cma_dev)
2100 return;
2101
2102 cma_dev->device = device;
2103 cma_dev->node_guid = device->node_guid;
2104 if (!cma_dev->node_guid)
2105 goto err;
2106
2107 init_completion(&cma_dev->comp);
2108 atomic_set(&cma_dev->refcount, 1);
2109 INIT_LIST_HEAD(&cma_dev->id_list);
2110 ib_set_client_data(device, &cma_client, cma_dev);
2111
2112 mutex_lock(&lock);
2113 list_add_tail(&cma_dev->list, &dev_list);
2114 list_for_each_entry(id_priv, &listen_any_list, list)
2115 cma_listen_on_dev(id_priv, cma_dev);
2116 mutex_unlock(&lock);
2117 return;
2118err:
2119 kfree(cma_dev);
2120}
2121
2122static int cma_remove_id_dev(struct rdma_id_private *id_priv)
2123{
2124 enum cma_state state;
2125
2126 /* Record that we want to remove the device */
2127 state = cma_exch(id_priv, CMA_DEVICE_REMOVAL);
2128 if (state == CMA_DESTROYING)
2129 return 0;
2130
2131 cma_cancel_operation(id_priv, state);
2132 wait_event(id_priv->wait_remove, !atomic_read(&id_priv->dev_remove));
2133
2134 /* Check for destruction from another callback. */
2135 if (!cma_comp(id_priv, CMA_DEVICE_REMOVAL))
2136 return 0;
2137
2138 return cma_notify_user(id_priv, RDMA_CM_EVENT_DEVICE_REMOVAL,
2139 0, NULL, 0);
2140}
2141
2142static void cma_process_remove(struct cma_device *cma_dev)
2143{
2144 struct list_head remove_list;
2145 struct rdma_id_private *id_priv;
2146 int ret;
2147
2148 INIT_LIST_HEAD(&remove_list);
2149
2150 mutex_lock(&lock);
2151 while (!list_empty(&cma_dev->id_list)) {
2152 id_priv = list_entry(cma_dev->id_list.next,
2153 struct rdma_id_private, list);
2154
2155 if (cma_internal_listen(id_priv)) {
2156 cma_destroy_listen(id_priv);
2157 continue;
2158 }
2159
2160 list_del(&id_priv->list);
2161 list_add_tail(&id_priv->list, &remove_list);
2162 atomic_inc(&id_priv->refcount);
2163 mutex_unlock(&lock);
2164
2165 ret = cma_remove_id_dev(id_priv);
2166 cma_deref_id(id_priv);
2167 if (ret)
2168 rdma_destroy_id(&id_priv->id);
2169
2170 mutex_lock(&lock);
2171 }
2172 mutex_unlock(&lock);
2173
2174 cma_deref_dev(cma_dev);
2175 wait_for_completion(&cma_dev->comp);
2176}
2177
2178static void cma_remove_one(struct ib_device *device)
2179{
2180 struct cma_device *cma_dev;
2181
2182 cma_dev = ib_get_client_data(device, &cma_client);
2183 if (!cma_dev)
2184 return;
2185
2186 mutex_lock(&lock);
2187 list_del(&cma_dev->list);
2188 mutex_unlock(&lock);
2189
2190 cma_process_remove(cma_dev);
2191 kfree(cma_dev);
2192}
2193
2194static int cma_init(void)
2195{
2196 int ret;
2197
2198 cma_wq = create_singlethread_workqueue("rdma_cm_wq");
2199 if (!cma_wq)
2200 return -ENOMEM;
2201
2202 ret = ib_register_client(&cma_client);
2203 if (ret)
2204 goto err;
2205 return 0;
2206
2207err:
2208 destroy_workqueue(cma_wq);
2209 return ret;
2210}
2211
2212static void cma_cleanup(void)
2213{
2214 ib_unregister_client(&cma_client);
2215 destroy_workqueue(cma_wq);
2216 idr_destroy(&sdp_ps);
2217 idr_destroy(&tcp_ps);
2218}
2219
2220module_init(cma_init);
2221module_exit(cma_cleanup);
kernel source for telekom puls (alcatel/mediatek)