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Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik...
[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;
e51060f0
SH		 66static LIST_HEAD(dev_list);
67static LIST_HEAD(listen_any_list);
68static DEFINE_MUTEX(lock);
69static struct workqueue_struct *cma_wq;
70static DEFINE_IDR(sdp_ps);
71static DEFINE_IDR(tcp_ps);
72
73struct cma_device {
74 struct list_head list;
75 struct ib_device *device;
76 __be64 node_guid;
77 struct completion comp;
78 atomic_t refcount;
79 struct list_head id_list;
80};
81
82enum cma_state {
83 CMA_IDLE,
84 CMA_ADDR_QUERY,
85 CMA_ADDR_RESOLVED,
86 CMA_ROUTE_QUERY,
87 CMA_ROUTE_RESOLVED,
88 CMA_CONNECT,
89 CMA_DISCONNECT,
90 CMA_ADDR_BOUND,
91 CMA_LISTEN,
92 CMA_DEVICE_REMOVAL,
93 CMA_DESTROYING
94};
95
96struct rdma_bind_list {
97 struct idr *ps;
98 struct hlist_head owners;
99 unsigned short port;
100};
101
102/*
103 * Device removal can occur at anytime, so we need extra handling to
104 * serialize notifying the user of device removal with other callbacks.
105 * We do this by disabling removal notification while a callback is in process,
106 * and reporting it after the callback completes.
107 */
108struct rdma_id_private {
109 struct rdma_cm_id id;
110
111 struct rdma_bind_list *bind_list;
112 struct hlist_node node;
113 struct list_head list;
114 struct list_head listen_list;
115 struct cma_device *cma_dev;
116
117 enum cma_state state;
118 spinlock_t lock;
119 struct completion comp;
120 atomic_t refcount;
121 wait_queue_head_t wait_remove;
122 atomic_t dev_remove;
123
124 int backlog;
125 int timeout_ms;
126 struct ib_sa_query *query;
127 int query_id;
128 union {
129 struct ib_cm_id *ib;
07ebafba 130 struct iw_cm_id *iw;
e51060f0
SH		 131 } cm_id;
132
133 u32 seq_num;
134 u32 qp_num;
135 enum ib_qp_type qp_type;
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;
346 qp_attr.qp_access_flags = IB_ACCESS_LOCAL_WRITE;
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;
394 id_priv->qp_type = qp->qp_type;
395 id_priv->srq = (qp->srq != NULL);
396 return 0;
397err:
398 ib_destroy_qp(qp);
399 return ret;
400}
401EXPORT_SYMBOL(rdma_create_qp);
402
403void rdma_destroy_qp(struct rdma_cm_id *id)
404{
405 ib_destroy_qp(id->qp);
406}
407EXPORT_SYMBOL(rdma_destroy_qp);
408
409static int cma_modify_qp_rtr(struct rdma_cm_id *id)
410{
411 struct ib_qp_attr qp_attr;
412 int qp_attr_mask, ret;
413
414 if (!id->qp)
415 return 0;
416
417 /* Need to update QP attributes from default values. */
418 qp_attr.qp_state = IB_QPS_INIT;
419 ret = rdma_init_qp_attr(id, &qp_attr, &qp_attr_mask);
420 if (ret)
421 return ret;
422
423 ret = ib_modify_qp(id->qp, &qp_attr, qp_attr_mask);
424 if (ret)
425 return ret;
426
427 qp_attr.qp_state = IB_QPS_RTR;
428 ret = rdma_init_qp_attr(id, &qp_attr, &qp_attr_mask);
429 if (ret)
430 return ret;
431
432 return ib_modify_qp(id->qp, &qp_attr, qp_attr_mask);
433}
434
435static int cma_modify_qp_rts(struct rdma_cm_id *id)
436{
437 struct ib_qp_attr qp_attr;
438 int qp_attr_mask, ret;
439
440 if (!id->qp)
441 return 0;
442
443 qp_attr.qp_state = IB_QPS_RTS;
444 ret = rdma_init_qp_attr(id, &qp_attr, &qp_attr_mask);
445 if (ret)
446 return ret;
447
448 return ib_modify_qp(id->qp, &qp_attr, qp_attr_mask);
449}
450
451static int cma_modify_qp_err(struct rdma_cm_id *id)
452{
453 struct ib_qp_attr qp_attr;
454
455 if (!id->qp)
456 return 0;
457
458 qp_attr.qp_state = IB_QPS_ERR;
459 return ib_modify_qp(id->qp, &qp_attr, IB_QP_STATE);
460}
461
462int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
463 int *qp_attr_mask)
464{
465 struct rdma_id_private *id_priv;
466 int ret;
467
468 id_priv = container_of(id, struct rdma_id_private, id);
07ebafba
TT		 469 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
470 case RDMA_TRANSPORT_IB:
e51060f0
SH		 471 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
472 qp_attr_mask);
473 if (qp_attr->qp_state == IB_QPS_RTR)
474 qp_attr->rq_psn = id_priv->seq_num;
475 break;
07ebafba
TT		 476 case RDMA_TRANSPORT_IWARP:
477 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
478 qp_attr_mask);
479 break;
e51060f0
SH		 480 default:
481 ret = -ENOSYS;
482 break;
483 }
484
485 return ret;
486}
487EXPORT_SYMBOL(rdma_init_qp_attr);
488
489static inline int cma_zero_addr(struct sockaddr *addr)
490{
491 struct in6_addr *ip6;
492
493 if (addr->sa_family == AF_INET)
494 return ZERONET(((struct sockaddr_in *) addr)->sin_addr.s_addr);
495 else {
496 ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr;
497 return (ip6->s6_addr32[0] | ip6->s6_addr32[1] |
5fd571cb 498 ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0;
e51060f0
SH		 499 }
500}
501
502static inline int cma_loopback_addr(struct sockaddr *addr)
503{
504 return LOOPBACK(((struct sockaddr_in *) addr)->sin_addr.s_addr);
505}
506
507static inline int cma_any_addr(struct sockaddr *addr)
508{
509 return cma_zero_addr(addr) || cma_loopback_addr(addr);
510}
511
512static inline int cma_any_port(struct sockaddr *addr)
513{
514 return !((struct sockaddr_in *) addr)->sin_port;
515}
516
517static int cma_get_net_info(void *hdr, enum rdma_port_space ps,
518 u8 *ip_ver, __u16 *port,
519 union cma_ip_addr **src, union cma_ip_addr **dst)
520{
521 switch (ps) {
522 case RDMA_PS_SDP:
523 if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) !=
524 SDP_MAJ_VERSION)
525 return -EINVAL;
526
527 *ip_ver = sdp_get_ip_ver(hdr);
528 *port = ((struct sdp_hh *) hdr)->port;
529 *src = &((struct sdp_hh *) hdr)->src_addr;
530 *dst = &((struct sdp_hh *) hdr)->dst_addr;
531 break;
532 default:
533 if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION)
534 return -EINVAL;
535
536 *ip_ver = cma_get_ip_ver(hdr);
537 *port = ((struct cma_hdr *) hdr)->port;
538 *src = &((struct cma_hdr *) hdr)->src_addr;
539 *dst = &((struct cma_hdr *) hdr)->dst_addr;
540 break;
541 }
542
543 if (*ip_ver != 4 && *ip_ver != 6)
544 return -EINVAL;
545 return 0;
546}
547
548static void cma_save_net_info(struct rdma_addr *addr,
549 struct rdma_addr *listen_addr,
550 u8 ip_ver, __u16 port,
551 union cma_ip_addr *src, union cma_ip_addr *dst)
552{
553 struct sockaddr_in *listen4, *ip4;
554 struct sockaddr_in6 *listen6, *ip6;
555
556 switch (ip_ver) {
557 case 4:
558 listen4 = (struct sockaddr_in *) &listen_addr->src_addr;
559 ip4 = (struct sockaddr_in *) &addr->src_addr;
560 ip4->sin_family = listen4->sin_family;
561 ip4->sin_addr.s_addr = dst->ip4.addr;
562 ip4->sin_port = listen4->sin_port;
563
564 ip4 = (struct sockaddr_in *) &addr->dst_addr;
565 ip4->sin_family = listen4->sin_family;
566 ip4->sin_addr.s_addr = src->ip4.addr;
567 ip4->sin_port = port;
568 break;
569 case 6:
570 listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr;
571 ip6 = (struct sockaddr_in6 *) &addr->src_addr;
572 ip6->sin6_family = listen6->sin6_family;
573 ip6->sin6_addr = dst->ip6;
574 ip6->sin6_port = listen6->sin6_port;
575
576 ip6 = (struct sockaddr_in6 *) &addr->dst_addr;
577 ip6->sin6_family = listen6->sin6_family;
578 ip6->sin6_addr = src->ip6;
579 ip6->sin6_port = port;
580 break;
581 default:
582 break;
583 }
584}
585
586static inline int cma_user_data_offset(enum rdma_port_space ps)
587{
588 switch (ps) {
589 case RDMA_PS_SDP:
590 return 0;
591 default:
592 return sizeof(struct cma_hdr);
593 }
594}
595
596static int cma_notify_user(struct rdma_id_private *id_priv,
597 enum rdma_cm_event_type type, int status,
598 void *data, u8 data_len)
599{
600 struct rdma_cm_event event;
601
602 event.event = type;
603 event.status = status;
604 event.private_data = data;
605 event.private_data_len = data_len;
606
607 return id_priv->id.event_handler(&id_priv->id, &event);
608}
609
610static void cma_cancel_route(struct rdma_id_private *id_priv)
611{
07ebafba
TT		 612 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
613 case RDMA_TRANSPORT_IB:
e51060f0
SH		 614 if (id_priv->query)
615 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
616 break;
617 default:
618 break;
619 }
620}
621
622static inline int cma_internal_listen(struct rdma_id_private *id_priv)
623{
624 return (id_priv->state == CMA_LISTEN) && id_priv->cma_dev &&
625 cma_any_addr(&id_priv->id.route.addr.src_addr);
626}
627
628static void cma_destroy_listen(struct rdma_id_private *id_priv)
629{
630 cma_exch(id_priv, CMA_DESTROYING);
631
632 if (id_priv->cma_dev) {
07ebafba
TT		 633 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
634 case RDMA_TRANSPORT_IB:
3cd96564 635 if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib))
e51060f0
SH		 636 ib_destroy_cm_id(id_priv->cm_id.ib);
637 break;
07ebafba
TT		 638 case RDMA_TRANSPORT_IWARP:
639 if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw))
640 iw_destroy_cm_id(id_priv->cm_id.iw);
641 break;
e51060f0
SH		 642 default:
643 break;
644 }
645 cma_detach_from_dev(id_priv);
646 }
647 list_del(&id_priv->listen_list);
648
649 cma_deref_id(id_priv);
650 wait_for_completion(&id_priv->comp);
651
652 kfree(id_priv);
653}
654
655static void cma_cancel_listens(struct rdma_id_private *id_priv)
656{
657 struct rdma_id_private *dev_id_priv;
658
659 mutex_lock(&lock);
660 list_del(&id_priv->list);
661
662 while (!list_empty(&id_priv->listen_list)) {
663 dev_id_priv = list_entry(id_priv->listen_list.next,
664 struct rdma_id_private, listen_list);
665 cma_destroy_listen(dev_id_priv);
666 }
667 mutex_unlock(&lock);
668}
669
670static void cma_cancel_operation(struct rdma_id_private *id_priv,
671 enum cma_state state)
672{
673 switch (state) {
674 case CMA_ADDR_QUERY:
675 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
676 break;
677 case CMA_ROUTE_QUERY:
678 cma_cancel_route(id_priv);
679 break;
680 case CMA_LISTEN:
681 if (cma_any_addr(&id_priv->id.route.addr.src_addr) &&
682 !id_priv->cma_dev)
683 cma_cancel_listens(id_priv);
684 break;
685 default:
686 break;
687 }
688}
689
690static void cma_release_port(struct rdma_id_private *id_priv)
691{
692 struct rdma_bind_list *bind_list = id_priv->bind_list;
693
694 if (!bind_list)
695 return;
696
697 mutex_lock(&lock);
698 hlist_del(&id_priv->node);
699 if (hlist_empty(&bind_list->owners)) {
700 idr_remove(bind_list->ps, bind_list->port);
701 kfree(bind_list);
702 }
703 mutex_unlock(&lock);
704}
705
706void rdma_destroy_id(struct rdma_cm_id *id)
707{
708 struct rdma_id_private *id_priv;
709 enum cma_state state;
710
711 id_priv = container_of(id, struct rdma_id_private, id);
712 state = cma_exch(id_priv, CMA_DESTROYING);
713 cma_cancel_operation(id_priv, state);
714
61a73c70 715 mutex_lock(&lock);
e51060f0 716 if (id_priv->cma_dev) {
61a73c70 717 mutex_unlock(&lock);
07ebafba
TT		 718 switch (rdma_node_get_transport(id->device->node_type)) {
719 case RDMA_TRANSPORT_IB:
3cd96564 720 if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib))
e51060f0
SH		 721 ib_destroy_cm_id(id_priv->cm_id.ib);
722 break;
07ebafba
TT		 723 case RDMA_TRANSPORT_IWARP:
724 if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw))
725 iw_destroy_cm_id(id_priv->cm_id.iw);
726 break;
e51060f0
SH		 727 default:
728 break;
729 }
3cd96564 730 mutex_lock(&lock);
e51060f0 731 cma_detach_from_dev(id_priv);
e51060f0 732 }
61a73c70 733 mutex_unlock(&lock);
e51060f0
SH		 734
735 cma_release_port(id_priv);
736 cma_deref_id(id_priv);
737 wait_for_completion(&id_priv->comp);
738
739 kfree(id_priv->id.route.path_rec);
740 kfree(id_priv);
741}
742EXPORT_SYMBOL(rdma_destroy_id);
743
744static int cma_rep_recv(struct rdma_id_private *id_priv)
745{
746 int ret;
747
748 ret = cma_modify_qp_rtr(&id_priv->id);
749 if (ret)
750 goto reject;
751
752 ret = cma_modify_qp_rts(&id_priv->id);
753 if (ret)
754 goto reject;
755
756 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
757 if (ret)
758 goto reject;
759
760 return 0;
761reject:
762 cma_modify_qp_err(&id_priv->id);
763 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
764 NULL, 0, NULL, 0);
765 return ret;
766}
767
768static int cma_verify_rep(struct rdma_id_private *id_priv, void *data)
769{
770 if (id_priv->id.ps == RDMA_PS_SDP &&
771 sdp_get_majv(((struct sdp_hah *) data)->sdp_version) !=
772 SDP_MAJ_VERSION)
773 return -EINVAL;
774
775 return 0;
776}
777
778static int cma_rtu_recv(struct rdma_id_private *id_priv)
779{
780 int ret;
781
782 ret = cma_modify_qp_rts(&id_priv->id);
783 if (ret)
784 goto reject;
785
786 return 0;
787reject:
788 cma_modify_qp_err(&id_priv->id);
789 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
790 NULL, 0, NULL, 0);
791 return ret;
792}
793
794static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
795{
796 struct rdma_id_private *id_priv = cm_id->context;
797 enum rdma_cm_event_type event;
798 u8 private_data_len = 0;
799 int ret = 0, status = 0;
800
801 atomic_inc(&id_priv->dev_remove);
802 if (!cma_comp(id_priv, CMA_CONNECT))
803 goto out;
804
805 switch (ib_event->event) {
806 case IB_CM_REQ_ERROR:
807 case IB_CM_REP_ERROR:
808 event = RDMA_CM_EVENT_UNREACHABLE;
809 status = -ETIMEDOUT;
810 break;
811 case IB_CM_REP_RECEIVED:
812 status = cma_verify_rep(id_priv, ib_event->private_data);
813 if (status)
814 event = RDMA_CM_EVENT_CONNECT_ERROR;
815 else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) {
816 status = cma_rep_recv(id_priv);
817 event = status ? RDMA_CM_EVENT_CONNECT_ERROR :
818 RDMA_CM_EVENT_ESTABLISHED;
819 } else
820 event = RDMA_CM_EVENT_CONNECT_RESPONSE;
821 private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
822 break;
823 case IB_CM_RTU_RECEIVED:
824 status = cma_rtu_recv(id_priv);
825 event = status ? RDMA_CM_EVENT_CONNECT_ERROR :
826 RDMA_CM_EVENT_ESTABLISHED;
827 break;
828 case IB_CM_DREQ_ERROR:
829 status = -ETIMEDOUT; /* fall through */
830 case IB_CM_DREQ_RECEIVED:
831 case IB_CM_DREP_RECEIVED:
832 if (!cma_comp_exch(id_priv, CMA_CONNECT, CMA_DISCONNECT))
833 goto out;
834 event = RDMA_CM_EVENT_DISCONNECTED;
835 break;
836 case IB_CM_TIMEWAIT_EXIT:
837 case IB_CM_MRA_RECEIVED:
838 /* ignore event */
839 goto out;
840 case IB_CM_REJ_RECEIVED:
841 cma_modify_qp_err(&id_priv->id);
842 status = ib_event->param.rej_rcvd.reason;
843 event = RDMA_CM_EVENT_REJECTED;
74f76fba 844 private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
e51060f0
SH		 845 break;
846 default:
847 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d",
848 ib_event->event);
849 goto out;
850 }
851
852 ret = cma_notify_user(id_priv, event, status, ib_event->private_data,
853 private_data_len);
854 if (ret) {
855 /* Destroy the CM ID by returning a non-zero value. */
856 id_priv->cm_id.ib = NULL;
857 cma_exch(id_priv, CMA_DESTROYING);
858 cma_release_remove(id_priv);
859 rdma_destroy_id(&id_priv->id);
860 return ret;
861 }
862out:
863 cma_release_remove(id_priv);
864 return ret;
865}
866
867static struct rdma_id_private *cma_new_id(struct rdma_cm_id *listen_id,
868 struct ib_cm_event *ib_event)
869{
870 struct rdma_id_private *id_priv;
871 struct rdma_cm_id *id;
872 struct rdma_route *rt;
873 union cma_ip_addr *src, *dst;
874 __u16 port;
875 u8 ip_ver;
876
877 id = rdma_create_id(listen_id->event_handler, listen_id->context,
878 listen_id->ps);
879 if (IS_ERR(id))
880 return NULL;
881
882 rt = &id->route;
883 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
884 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths, GFP_KERNEL);
885 if (!rt->path_rec)
886 goto err;
887
888 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
889 &ip_ver, &port, &src, &dst))
890 goto err;
891
892 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
893 ip_ver, port, src, dst);
894 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
895 if (rt->num_paths == 2)
896 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
897
898 ib_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
899 ib_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
900 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
07ebafba 901 rt->addr.dev_addr.dev_type = RDMA_NODE_IB_CA;
e51060f0
SH		 902
903 id_priv = container_of(id, struct rdma_id_private, id);
904 id_priv->state = CMA_CONNECT;
905 return id_priv;
906err:
907 rdma_destroy_id(id);
908 return NULL;
909}
910
911static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
912{
913 struct rdma_id_private *listen_id, *conn_id;
914 int offset, ret;
915
916 listen_id = cm_id->context;
917 atomic_inc(&listen_id->dev_remove);
918 if (!cma_comp(listen_id, CMA_LISTEN)) {
919 ret = -ECONNABORTED;
920 goto out;
921 }
922
923 conn_id = cma_new_id(&listen_id->id, ib_event);
924 if (!conn_id) {
925 ret = -ENOMEM;
926 goto out;
927 }
928
929 atomic_inc(&conn_id->dev_remove);
61a73c70 930 mutex_lock(&lock);
07ebafba 931 ret = cma_acquire_dev(conn_id);
61a73c70 932 mutex_unlock(&lock);
e51060f0
SH		 933 if (ret) {
934 ret = -ENODEV;
935 cma_release_remove(conn_id);
936 rdma_destroy_id(&conn_id->id);
937 goto out;
938 }
939
940 conn_id->cm_id.ib = cm_id;
941 cm_id->context = conn_id;
942 cm_id->cm_handler = cma_ib_handler;
943
944 offset = cma_user_data_offset(listen_id->id.ps);
945 ret = cma_notify_user(conn_id, RDMA_CM_EVENT_CONNECT_REQUEST, 0,
946 ib_event->private_data + offset,
947 IB_CM_REQ_PRIVATE_DATA_SIZE - offset);
948 if (ret) {
949 /* Destroy the CM ID by returning a non-zero value. */
950 conn_id->cm_id.ib = NULL;
951 cma_exch(conn_id, CMA_DESTROYING);
952 cma_release_remove(conn_id);
953 rdma_destroy_id(&conn_id->id);
954 }
955out:
956 cma_release_remove(listen_id);
957 return ret;
958}
959
960static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr)
961{
962 return cpu_to_be64(((u64)ps << 16) +
963 be16_to_cpu(((struct sockaddr_in *) addr)->sin_port));
964}
965
966static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr,
967 struct ib_cm_compare_data *compare)
968{
969 struct cma_hdr *cma_data, *cma_mask;
970 struct sdp_hh *sdp_data, *sdp_mask;
971 __u32 ip4_addr;
972 struct in6_addr ip6_addr;
973
974 memset(compare, 0, sizeof *compare);
975 cma_data = (void *) compare->data;
976 cma_mask = (void *) compare->mask;
977 sdp_data = (void *) compare->data;
978 sdp_mask = (void *) compare->mask;
979
980 switch (addr->sa_family) {
981 case AF_INET:
982 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
983 if (ps == RDMA_PS_SDP) {
984 sdp_set_ip_ver(sdp_data, 4);
985 sdp_set_ip_ver(sdp_mask, 0xF);
986 sdp_data->dst_addr.ip4.addr = ip4_addr;
987 sdp_mask->dst_addr.ip4.addr = ~0;
988 } else {
989 cma_set_ip_ver(cma_data, 4);
990 cma_set_ip_ver(cma_mask, 0xF);
991 cma_data->dst_addr.ip4.addr = ip4_addr;
992 cma_mask->dst_addr.ip4.addr = ~0;
993 }
994 break;
995 case AF_INET6:
996 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr;
997 if (ps == RDMA_PS_SDP) {
998 sdp_set_ip_ver(sdp_data, 6);
999 sdp_set_ip_ver(sdp_mask, 0xF);
1000 sdp_data->dst_addr.ip6 = ip6_addr;
1001 memset(&sdp_mask->dst_addr.ip6, 0xFF,
1002 sizeof sdp_mask->dst_addr.ip6);
1003 } else {
1004 cma_set_ip_ver(cma_data, 6);
1005 cma_set_ip_ver(cma_mask, 0xF);
1006 cma_data->dst_addr.ip6 = ip6_addr;
1007 memset(&cma_mask->dst_addr.ip6, 0xFF,
1008 sizeof cma_mask->dst_addr.ip6);
1009 }
1010 break;
1011 default:
1012 break;
1013 }
1014}
1015
07ebafba
TT		 1016static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1017{
1018 struct rdma_id_private *id_priv = iw_id->context;
1019 enum rdma_cm_event_type event = 0;
1020 struct sockaddr_in *sin;
1021 int ret = 0;
1022
1023 atomic_inc(&id_priv->dev_remove);
1024
1025 switch (iw_event->event) {
1026 case IW_CM_EVENT_CLOSE:
1027 event = RDMA_CM_EVENT_DISCONNECTED;
1028 break;
1029 case IW_CM_EVENT_CONNECT_REPLY:
1030 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1031 *sin = iw_event->local_addr;
1032 sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr;
1033 *sin = iw_event->remote_addr;
1034 if (iw_event->status)
1035 event = RDMA_CM_EVENT_REJECTED;
1036 else
1037 event = RDMA_CM_EVENT_ESTABLISHED;
1038 break;
1039 case IW_CM_EVENT_ESTABLISHED:
1040 event = RDMA_CM_EVENT_ESTABLISHED;
1041 break;
1042 default:
1043 BUG_ON(1);
1044 }
1045
1046 ret = cma_notify_user(id_priv, event, iw_event->status,
1047 iw_event->private_data,
1048 iw_event->private_data_len);
1049 if (ret) {
1050 /* Destroy the CM ID by returning a non-zero value. */
1051 id_priv->cm_id.iw = NULL;
1052 cma_exch(id_priv, CMA_DESTROYING);
1053 cma_release_remove(id_priv);
1054 rdma_destroy_id(&id_priv->id);
1055 return ret;
1056 }
1057
1058 cma_release_remove(id_priv);
1059 return ret;
1060}
1061
1062static int iw_conn_req_handler(struct iw_cm_id *cm_id,
1063 struct iw_cm_event *iw_event)
1064{
1065 struct rdma_cm_id *new_cm_id;
1066 struct rdma_id_private *listen_id, *conn_id;
1067 struct sockaddr_in *sin;
1068 struct net_device *dev = NULL;
1069 int ret;
1070
1071 listen_id = cm_id->context;
1072 atomic_inc(&listen_id->dev_remove);
1073 if (!cma_comp(listen_id, CMA_LISTEN)) {
1074 ret = -ECONNABORTED;
1075 goto out;
1076 }
1077
1078 /* Create a new RDMA id for the new IW CM ID */
1079 new_cm_id = rdma_create_id(listen_id->id.event_handler,
1080 listen_id->id.context,
1081 RDMA_PS_TCP);
1082 if (!new_cm_id) {
1083 ret = -ENOMEM;
1084 goto out;
1085 }
1086 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
1087 atomic_inc(&conn_id->dev_remove);
1088 conn_id->state = CMA_CONNECT;
1089
1090 dev = ip_dev_find(iw_event->local_addr.sin_addr.s_addr);
1091 if (!dev) {
1092 ret = -EADDRNOTAVAIL;
1093 cma_release_remove(conn_id);
1094 rdma_destroy_id(new_cm_id);
1095 goto out;
1096 }
1097 ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL);
1098 if (ret) {
1099 cma_release_remove(conn_id);
1100 rdma_destroy_id(new_cm_id);
1101 goto out;
1102 }
1103
61a73c70 1104 mutex_lock(&lock);
07ebafba 1105 ret = cma_acquire_dev(conn_id);
61a73c70 1106 mutex_unlock(&lock);
07ebafba
TT		 1107 if (ret) {
1108 cma_release_remove(conn_id);
1109 rdma_destroy_id(new_cm_id);
1110 goto out;
1111 }
1112
1113 conn_id->cm_id.iw = cm_id;
1114 cm_id->context = conn_id;
1115 cm_id->cm_handler = cma_iw_handler;
1116
1117 sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr;
1118 *sin = iw_event->local_addr;
1119 sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr;
1120 *sin = iw_event->remote_addr;
1121
1122 ret = cma_notify_user(conn_id, RDMA_CM_EVENT_CONNECT_REQUEST, 0,
1123 iw_event->private_data,
1124 iw_event->private_data_len);
1125 if (ret) {
1126 /* User wants to destroy the CM ID */
1127 conn_id->cm_id.iw = NULL;
1128 cma_exch(conn_id, CMA_DESTROYING);
1129 cma_release_remove(conn_id);
1130 rdma_destroy_id(&conn_id->id);
1131 }
1132
1133out:
1134 if (dev)
1135 dev_put(dev);
1136 cma_release_remove(listen_id);
1137 return ret;
1138}
1139
e51060f0
SH		 1140static int cma_ib_listen(struct rdma_id_private *id_priv)
1141{
1142 struct ib_cm_compare_data compare_data;
1143 struct sockaddr *addr;
1144 __be64 svc_id;
1145 int ret;
1146
1147 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_req_handler,
1148 id_priv);
1149 if (IS_ERR(id_priv->cm_id.ib))
1150 return PTR_ERR(id_priv->cm_id.ib);
1151
1152 addr = &id_priv->id.route.addr.src_addr;
1153 svc_id = cma_get_service_id(id_priv->id.ps, addr);
1154 if (cma_any_addr(addr))
1155 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL);
1156 else {
1157 cma_set_compare_data(id_priv->id.ps, addr, &compare_data);
1158 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data);
1159 }
1160
1161 if (ret) {
1162 ib_destroy_cm_id(id_priv->cm_id.ib);
1163 id_priv->cm_id.ib = NULL;
1164 }
1165
1166 return ret;
1167}
1168
07ebafba
TT		 1169static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
1170{
1171 int ret;
1172 struct sockaddr_in *sin;
1173
1174 id_priv->cm_id.iw = iw_create_cm_id(id_priv->id.device,
1175 iw_conn_req_handler,
1176 id_priv);
1177 if (IS_ERR(id_priv->cm_id.iw))
1178 return PTR_ERR(id_priv->cm_id.iw);
1179
1180 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1181 id_priv->cm_id.iw->local_addr = *sin;
1182
1183 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
1184
1185 if (ret) {
1186 iw_destroy_cm_id(id_priv->cm_id.iw);
1187 id_priv->cm_id.iw = NULL;
1188 }
1189
1190 return ret;
1191}
1192
e51060f0
SH		 1193static int cma_listen_handler(struct rdma_cm_id *id,
1194 struct rdma_cm_event *event)
1195{
1196 struct rdma_id_private *id_priv = id->context;
1197
1198 id->context = id_priv->id.context;
1199 id->event_handler = id_priv->id.event_handler;
1200 return id_priv->id.event_handler(id, event);
1201}
1202
1203static void cma_listen_on_dev(struct rdma_id_private *id_priv,
1204 struct cma_device *cma_dev)
1205{
1206 struct rdma_id_private *dev_id_priv;
1207 struct rdma_cm_id *id;
1208 int ret;
1209
1210 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps);
1211 if (IS_ERR(id))
1212 return;
1213
1214 dev_id_priv = container_of(id, struct rdma_id_private, id);
1215
1216 dev_id_priv->state = CMA_ADDR_BOUND;
1217 memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr,
1218 ip_addr_size(&id_priv->id.route.addr.src_addr));
1219
1220 cma_attach_to_dev(dev_id_priv, cma_dev);
1221 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
1222
1223 ret = rdma_listen(id, id_priv->backlog);
1224 if (ret)
1225 goto err;
1226
1227 return;
1228err:
1229 cma_destroy_listen(dev_id_priv);
1230}
1231
1232static void cma_listen_on_all(struct rdma_id_private *id_priv)
1233{
1234 struct cma_device *cma_dev;
1235
1236 mutex_lock(&lock);
1237 list_add_tail(&id_priv->list, &listen_any_list);
1238 list_for_each_entry(cma_dev, &dev_list, list)
1239 cma_listen_on_dev(id_priv, cma_dev);
1240 mutex_unlock(&lock);
1241}
1242
1243static int cma_bind_any(struct rdma_cm_id *id, sa_family_t af)
1244{
1245 struct sockaddr_in addr_in;
1246
1247 memset(&addr_in, 0, sizeof addr_in);
1248 addr_in.sin_family = af;
1249 return rdma_bind_addr(id, (struct sockaddr *) &addr_in);
1250}
1251
1252int rdma_listen(struct rdma_cm_id *id, int backlog)
1253{
1254 struct rdma_id_private *id_priv;
1255 int ret;
1256
1257 id_priv = container_of(id, struct rdma_id_private, id);
1258 if (id_priv->state == CMA_IDLE) {
1259 ret = cma_bind_any(id, AF_INET);
1260 if (ret)
1261 return ret;
1262 }
1263
1264 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_LISTEN))
1265 return -EINVAL;
1266
1267 id_priv->backlog = backlog;
1268 if (id->device) {
07ebafba
TT		 1269 switch (rdma_node_get_transport(id->device->node_type)) {
1270 case RDMA_TRANSPORT_IB:
e51060f0
SH		 1271 ret = cma_ib_listen(id_priv);
1272 if (ret)
1273 goto err;
1274 break;
07ebafba
TT		 1275 case RDMA_TRANSPORT_IWARP:
1276 ret = cma_iw_listen(id_priv, backlog);
1277 if (ret)
1278 goto err;
1279 break;
e51060f0
SH		 1280 default:
1281 ret = -ENOSYS;
1282 goto err;
1283 }
1284 } else
1285 cma_listen_on_all(id_priv);
1286
1287 return 0;
1288err:
1289 id_priv->backlog = 0;
1290 cma_comp_exch(id_priv, CMA_LISTEN, CMA_ADDR_BOUND);
1291 return ret;
1292}
1293EXPORT_SYMBOL(rdma_listen);
1294
1295static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
1296 void *context)
1297{
1298 struct cma_work *work = context;
1299 struct rdma_route *route;
1300
1301 route = &work->id->id.route;
1302
1303 if (!status) {
1304 route->num_paths = 1;
1305 *route->path_rec = *path_rec;
1306 } else {
1307 work->old_state = CMA_ROUTE_QUERY;
1308 work->new_state = CMA_ADDR_RESOLVED;
1309 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
1310 }
1311
1312 queue_work(cma_wq, &work->work);
1313}
1314
1315static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
1316 struct cma_work *work)
1317{
1318 struct rdma_dev_addr *addr = &id_priv->id.route.addr.dev_addr;
1319 struct ib_sa_path_rec path_rec;
1320
1321 memset(&path_rec, 0, sizeof path_rec);
f0ee3404
MT		 1322 ib_addr_get_sgid(addr, &path_rec.sgid);
1323 ib_addr_get_dgid(addr, &path_rec.dgid);
e51060f0
SH		 1324 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(addr));
1325 path_rec.numb_path = 1;
1326
c1a0b23b 1327 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
e51060f0
SH		 1328 id_priv->id.port_num, &path_rec,
1329 IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
1330 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH,
1331 timeout_ms, GFP_KERNEL,
1332 cma_query_handler, work, &id_priv->query);
1333
1334 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
1335}
1336
1337static void cma_work_handler(void *data)
1338{
1339 struct cma_work *work = data;
1340 struct rdma_id_private *id_priv = work->id;
1341 int destroy = 0;
1342
1343 atomic_inc(&id_priv->dev_remove);
1344 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
1345 goto out;
1346
1347 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1348 cma_exch(id_priv, CMA_DESTROYING);
1349 destroy = 1;
1350 }
1351out:
1352 cma_release_remove(id_priv);
1353 cma_deref_id(id_priv);
1354 if (destroy)
1355 rdma_destroy_id(&id_priv->id);
1356 kfree(work);
1357}
1358
1359static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
1360{
1361 struct rdma_route *route = &id_priv->id.route;
1362 struct cma_work *work;
1363 int ret;
1364
1365 work = kzalloc(sizeof *work, GFP_KERNEL);
1366 if (!work)
1367 return -ENOMEM;
1368
1369 work->id = id_priv;
1370 INIT_WORK(&work->work, cma_work_handler, work);
1371 work->old_state = CMA_ROUTE_QUERY;
1372 work->new_state = CMA_ROUTE_RESOLVED;
1373 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1374
1375 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
1376 if (!route->path_rec) {
1377 ret = -ENOMEM;
1378 goto err1;
1379 }
1380
1381 ret = cma_query_ib_route(id_priv, timeout_ms, work);
1382 if (ret)
1383 goto err2;
1384
1385 return 0;
1386err2:
1387 kfree(route->path_rec);
1388 route->path_rec = NULL;
1389err1:
1390 kfree(work);
1391 return ret;
1392}
1393
1394int rdma_set_ib_paths(struct rdma_cm_id *id,
1395 struct ib_sa_path_rec *path_rec, int num_paths)
1396{
1397 struct rdma_id_private *id_priv;
1398 int ret;
1399
1400 id_priv = container_of(id, struct rdma_id_private, id);
1401 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_RESOLVED))
1402 return -EINVAL;
1403
1404 id->route.path_rec = kmalloc(sizeof *path_rec * num_paths, GFP_KERNEL);
1405 if (!id->route.path_rec) {
1406 ret = -ENOMEM;
1407 goto err;
1408 }
1409
1410 memcpy(id->route.path_rec, path_rec, sizeof *path_rec * num_paths);
1411 return 0;
1412err:
1413 cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_ADDR_RESOLVED);
1414 return ret;
1415}
1416EXPORT_SYMBOL(rdma_set_ib_paths);
1417
07ebafba
TT		 1418static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
1419{
1420 struct cma_work *work;
1421
1422 work = kzalloc(sizeof *work, GFP_KERNEL);
1423 if (!work)
1424 return -ENOMEM;
1425
1426 work->id = id_priv;
1427 INIT_WORK(&work->work, cma_work_handler, work);
1428 work->old_state = CMA_ROUTE_QUERY;
1429 work->new_state = CMA_ROUTE_RESOLVED;
1430 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1431 queue_work(cma_wq, &work->work);
1432 return 0;
1433}
1434
e51060f0
SH		 1435int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
1436{
1437 struct rdma_id_private *id_priv;
1438 int ret;
1439
1440 id_priv = container_of(id, struct rdma_id_private, id);
1441 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_QUERY))
1442 return -EINVAL;
1443
1444 atomic_inc(&id_priv->refcount);
07ebafba
TT		 1445 switch (rdma_node_get_transport(id->device->node_type)) {
1446 case RDMA_TRANSPORT_IB:
e51060f0
SH		 1447 ret = cma_resolve_ib_route(id_priv, timeout_ms);
1448 break;
07ebafba
TT		 1449 case RDMA_TRANSPORT_IWARP:
1450 ret = cma_resolve_iw_route(id_priv, timeout_ms);
1451 break;
e51060f0
SH		 1452 default:
1453 ret = -ENOSYS;
1454 break;
1455 }
1456 if (ret)
1457 goto err;
1458
1459 return 0;
1460err:
1461 cma_comp_exch(id_priv, CMA_ROUTE_QUERY, CMA_ADDR_RESOLVED);
1462 cma_deref_id(id_priv);
1463 return ret;
1464}
1465EXPORT_SYMBOL(rdma_resolve_route);
1466
1467static int cma_bind_loopback(struct rdma_id_private *id_priv)
1468{
1469 struct cma_device *cma_dev;
1470 struct ib_port_attr port_attr;
f0ee3404 1471 union ib_gid gid;
e51060f0
SH		 1472 u16 pkey;
1473 int ret;
1474 u8 p;
1475
1476 mutex_lock(&lock);
1477 list_for_each_entry(cma_dev, &dev_list, list)
1478 for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p)
1479 if (!ib_query_port (cma_dev->device, p, &port_attr) &&
1480 port_attr.state == IB_PORT_ACTIVE)
1481 goto port_found;
1482
1483 if (!list_empty(&dev_list)) {
1484 p = 1;
1485 cma_dev = list_entry(dev_list.next, struct cma_device, list);
1486 } else {
1487 ret = -ENODEV;
1488 goto out;
1489 }
1490
1491port_found:
f0ee3404 1492 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid);
e51060f0
SH		 1493 if (ret)
1494 goto out;
1495
1496 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
1497 if (ret)
1498 goto out;
1499
f0ee3404 1500 ib_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0
SH		 1501 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
1502 id_priv->id.port_num = p;
1503 cma_attach_to_dev(id_priv, cma_dev);
1504out:
1505 mutex_unlock(&lock);
1506 return ret;
1507}
1508
1509static void addr_handler(int status, struct sockaddr *src_addr,
1510 struct rdma_dev_addr *dev_addr, void *context)
1511{
1512 struct rdma_id_private *id_priv = context;
1513 enum rdma_cm_event_type event;
1514
1515 atomic_inc(&id_priv->dev_remove);
61a73c70
SH		 1516
1517 /*
1518 * Grab mutex to block rdma_destroy_id() from removing the device while
1519 * we're trying to acquire it.
1520 */
1521 mutex_lock(&lock);
1522 if (!cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_RESOLVED)) {
1523 mutex_unlock(&lock);
1524 goto out;
1525 }
1526
1527 if (!status && !id_priv->cma_dev)
e51060f0 1528 status = cma_acquire_dev(id_priv);
61a73c70 1529 mutex_unlock(&lock);
e51060f0
SH		 1530
1531 if (status) {
61a73c70 1532 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ADDR_BOUND))
e51060f0
SH		 1533 goto out;
1534 event = RDMA_CM_EVENT_ADDR_ERROR;
1535 } else {
e51060f0
SH		 1536 memcpy(&id_priv->id.route.addr.src_addr, src_addr,
1537 ip_addr_size(src_addr));
1538 event = RDMA_CM_EVENT_ADDR_RESOLVED;
1539 }
1540
1541 if (cma_notify_user(id_priv, event, status, NULL, 0)) {
1542 cma_exch(id_priv, CMA_DESTROYING);
1543 cma_release_remove(id_priv);
1544 cma_deref_id(id_priv);
1545 rdma_destroy_id(&id_priv->id);
1546 return;
1547 }
1548out:
1549 cma_release_remove(id_priv);
1550 cma_deref_id(id_priv);
1551}
1552
1553static int cma_resolve_loopback(struct rdma_id_private *id_priv)
1554{
1555 struct cma_work *work;
1556 struct sockaddr_in *src_in, *dst_in;
f0ee3404 1557 union ib_gid gid;
e51060f0
SH		 1558 int ret;
1559
1560 work = kzalloc(sizeof *work, GFP_KERNEL);
1561 if (!work)
1562 return -ENOMEM;
1563
1564 if (!id_priv->cma_dev) {
1565 ret = cma_bind_loopback(id_priv);
1566 if (ret)
1567 goto err;
1568 }
1569
f0ee3404
MT		 1570 ib_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
1571 ib_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0
SH		 1572
1573 if (cma_zero_addr(&id_priv->id.route.addr.src_addr)) {
1574 src_in = (struct sockaddr_in *)&id_priv->id.route.addr.src_addr;
1575 dst_in = (struct sockaddr_in *)&id_priv->id.route.addr.dst_addr;
1576 src_in->sin_family = dst_in->sin_family;
1577 src_in->sin_addr.s_addr = dst_in->sin_addr.s_addr;
1578 }
1579
1580 work->id = id_priv;
1581 INIT_WORK(&work->work, cma_work_handler, work);
1582 work->old_state = CMA_ADDR_QUERY;
1583 work->new_state = CMA_ADDR_RESOLVED;
1584 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
1585 queue_work(cma_wq, &work->work);
1586 return 0;
1587err:
1588 kfree(work);
1589 return ret;
1590}
1591
1592static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
1593 struct sockaddr *dst_addr)
1594{
1595 if (src_addr && src_addr->sa_family)
1596 return rdma_bind_addr(id, src_addr);
1597 else
1598 return cma_bind_any(id, dst_addr->sa_family);
1599}
1600
1601int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
1602 struct sockaddr *dst_addr, int timeout_ms)
1603{
1604 struct rdma_id_private *id_priv;
1605 int ret;
1606
1607 id_priv = container_of(id, struct rdma_id_private, id);
1608 if (id_priv->state == CMA_IDLE) {
1609 ret = cma_bind_addr(id, src_addr, dst_addr);
1610 if (ret)
1611 return ret;
1612 }
1613
1614 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_ADDR_QUERY))
1615 return -EINVAL;
1616
1617 atomic_inc(&id_priv->refcount);
1618 memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr));
1619 if (cma_any_addr(dst_addr))
1620 ret = cma_resolve_loopback(id_priv);
1621 else
1622 ret = rdma_resolve_ip(&id->route.addr.src_addr, dst_addr,
1623 &id->route.addr.dev_addr,
1624 timeout_ms, addr_handler, id_priv);
1625 if (ret)
1626 goto err;
1627
1628 return 0;
1629err:
1630 cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_BOUND);
1631 cma_deref_id(id_priv);
1632 return ret;
1633}
1634EXPORT_SYMBOL(rdma_resolve_addr);
1635
1636static void cma_bind_port(struct rdma_bind_list *bind_list,
1637 struct rdma_id_private *id_priv)
1638{
1639 struct sockaddr_in *sin;
1640
1641 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1642 sin->sin_port = htons(bind_list->port);
1643 id_priv->bind_list = bind_list;
1644 hlist_add_head(&id_priv->node, &bind_list->owners);
1645}
1646
1647static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv,
1648 unsigned short snum)
1649{
1650 struct rdma_bind_list *bind_list;
1651 int port, start, ret;
1652
1653 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
1654 if (!bind_list)
1655 return -ENOMEM;
1656
1657 start = snum ? snum : sysctl_local_port_range[0];
1658
1659 do {
1660 ret = idr_get_new_above(ps, bind_list, start, &port);
1661 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL));
1662
1663 if (ret)
1664 goto err;
1665
1666 if ((snum && port != snum) ||
1667 (!snum && port > sysctl_local_port_range[1])) {
1668 idr_remove(ps, port);
1669 ret = -EADDRNOTAVAIL;
1670 goto err;
1671 }
1672
1673 bind_list->ps = ps;
1674 bind_list->port = (unsigned short) port;
1675 cma_bind_port(bind_list, id_priv);
1676 return 0;
1677err:
1678 kfree(bind_list);
1679 return ret;
1680}
1681
1682static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv)
1683{
1684 struct rdma_id_private *cur_id;
1685 struct sockaddr_in *sin, *cur_sin;
1686 struct rdma_bind_list *bind_list;
1687 struct hlist_node *node;
1688 unsigned short snum;
1689
1690 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1691 snum = ntohs(sin->sin_port);
1692 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
1693 return -EACCES;
1694
1695 bind_list = idr_find(ps, snum);
1696 if (!bind_list)
1697 return cma_alloc_port(ps, id_priv, snum);
1698
1699 /*
1700 * We don't support binding to any address if anyone is bound to
1701 * a specific address on the same port.
1702 */
1703 if (cma_any_addr(&id_priv->id.route.addr.src_addr))
1704 return -EADDRNOTAVAIL;
1705
1706 hlist_for_each_entry(cur_id, node, &bind_list->owners, node) {
1707 if (cma_any_addr(&cur_id->id.route.addr.src_addr))
1708 return -EADDRNOTAVAIL;
3cd96564 1709
e51060f0
SH		 1710 cur_sin = (struct sockaddr_in *) &cur_id->id.route.addr.src_addr;
1711 if (sin->sin_addr.s_addr == cur_sin->sin_addr.s_addr)
1712 return -EADDRINUSE;
1713 }
1714
1715 cma_bind_port(bind_list, id_priv);
1716 return 0;
1717}
1718
1719static int cma_get_port(struct rdma_id_private *id_priv)
1720{
1721 struct idr *ps;
1722 int ret;
1723
1724 switch (id_priv->id.ps) {
1725 case RDMA_PS_SDP:
1726 ps = &sdp_ps;
1727 break;
1728 case RDMA_PS_TCP:
1729 ps = &tcp_ps;
1730 break;
1731 default:
1732 return -EPROTONOSUPPORT;
1733 }
1734
1735 mutex_lock(&lock);
1736 if (cma_any_port(&id_priv->id.route.addr.src_addr))
1737 ret = cma_alloc_port(ps, id_priv, 0);
1738 else
1739 ret = cma_use_port(ps, id_priv);
1740 mutex_unlock(&lock);
1741
1742 return ret;
1743}
1744
1745int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
1746{
1747 struct rdma_id_private *id_priv;
1748 int ret;
1749
1750 if (addr->sa_family != AF_INET)
1751 return -EAFNOSUPPORT;
1752
1753 id_priv = container_of(id, struct rdma_id_private, id);
1754 if (!cma_comp_exch(id_priv, CMA_IDLE, CMA_ADDR_BOUND))
1755 return -EINVAL;
1756
1757 if (!cma_any_addr(addr)) {
1758 ret = rdma_translate_ip(addr, &id->route.addr.dev_addr);
61a73c70
SH		 1759 if (!ret) {
1760 mutex_lock(&lock);
e51060f0 1761 ret = cma_acquire_dev(id_priv);
61a73c70
SH		 1762 mutex_unlock(&lock);
1763 }
e51060f0
SH		 1764 if (ret)
1765 goto err;
1766 }
1767
1768 memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr));
1769 ret = cma_get_port(id_priv);
1770 if (ret)
1771 goto err;
1772
1773 return 0;
1774err:
1775 cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_IDLE);
1776 return ret;
1777}
1778EXPORT_SYMBOL(rdma_bind_addr);
1779
1780static int cma_format_hdr(void *hdr, enum rdma_port_space ps,
1781 struct rdma_route *route)
1782{
1783 struct sockaddr_in *src4, *dst4;
1784 struct cma_hdr *cma_hdr;
1785 struct sdp_hh *sdp_hdr;
1786
1787 src4 = (struct sockaddr_in *) &route->addr.src_addr;
1788 dst4 = (struct sockaddr_in *) &route->addr.dst_addr;
1789
1790 switch (ps) {
1791 case RDMA_PS_SDP:
1792 sdp_hdr = hdr;
1793 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
1794 return -EINVAL;
1795 sdp_set_ip_ver(sdp_hdr, 4);
1796 sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
1797 sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
1798 sdp_hdr->port = src4->sin_port;
1799 break;
1800 default:
1801 cma_hdr = hdr;
1802 cma_hdr->cma_version = CMA_VERSION;
1803 cma_set_ip_ver(cma_hdr, 4);
1804 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
1805 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
1806 cma_hdr->port = src4->sin_port;
1807 break;
1808 }
1809 return 0;
1810}
1811
1812static int cma_connect_ib(struct rdma_id_private *id_priv,
1813 struct rdma_conn_param *conn_param)
1814{
1815 struct ib_cm_req_param req;
1816 struct rdma_route *route;
1817 void *private_data;
1818 int offset, ret;
1819
1820 memset(&req, 0, sizeof req);
1821 offset = cma_user_data_offset(id_priv->id.ps);
1822 req.private_data_len = offset + conn_param->private_data_len;
1823 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
1824 if (!private_data)
1825 return -ENOMEM;
1826
1827 if (conn_param->private_data && conn_param->private_data_len)
1828 memcpy(private_data + offset, conn_param->private_data,
1829 conn_param->private_data_len);
1830
1831 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_ib_handler,
1832 id_priv);
1833 if (IS_ERR(id_priv->cm_id.ib)) {
1834 ret = PTR_ERR(id_priv->cm_id.ib);
1835 goto out;
1836 }
1837
1838 route = &id_priv->id.route;
1839 ret = cma_format_hdr(private_data, id_priv->id.ps, route);
1840 if (ret)
1841 goto out;
1842 req.private_data = private_data;
1843
1844 req.primary_path = &route->path_rec[0];
1845 if (route->num_paths == 2)
1846 req.alternate_path = &route->path_rec[1];
1847
1848 req.service_id = cma_get_service_id(id_priv->id.ps,
1849 &route->addr.dst_addr);
1850 req.qp_num = id_priv->qp_num;
1851 req.qp_type = id_priv->qp_type;
1852 req.starting_psn = id_priv->seq_num;
1853 req.responder_resources = conn_param->responder_resources;
1854 req.initiator_depth = conn_param->initiator_depth;
1855 req.flow_control = conn_param->flow_control;
1856 req.retry_count = conn_param->retry_count;
1857 req.rnr_retry_count = conn_param->rnr_retry_count;
1858 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
1859 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
1860 req.max_cm_retries = CMA_MAX_CM_RETRIES;
1861 req.srq = id_priv->srq ? 1 : 0;
1862
1863 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
1864out:
1865 kfree(private_data);
1866 return ret;
1867}
1868
07ebafba
TT		 1869static int cma_connect_iw(struct rdma_id_private *id_priv,
1870 struct rdma_conn_param *conn_param)
1871{
1872 struct iw_cm_id *cm_id;
1873 struct sockaddr_in* sin;
1874 int ret;
1875 struct iw_cm_conn_param iw_param;
1876
1877 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
1878 if (IS_ERR(cm_id)) {
1879 ret = PTR_ERR(cm_id);
1880 goto out;
1881 }
1882
1883 id_priv->cm_id.iw = cm_id;
1884
1885 sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr;
1886 cm_id->local_addr = *sin;
1887
1888 sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr;
1889 cm_id->remote_addr = *sin;
1890
1891 ret = cma_modify_qp_rtr(&id_priv->id);
1892 if (ret) {
1893 iw_destroy_cm_id(cm_id);
1894 return ret;
1895 }
1896
1897 iw_param.ord = conn_param->initiator_depth;
1898 iw_param.ird = conn_param->responder_resources;
1899 iw_param.private_data = conn_param->private_data;
1900 iw_param.private_data_len = conn_param->private_data_len;
1901 if (id_priv->id.qp)
1902 iw_param.qpn = id_priv->qp_num;
1903 else
1904 iw_param.qpn = conn_param->qp_num;
1905 ret = iw_cm_connect(cm_id, &iw_param);
1906out:
1907 return ret;
1908}
1909
e51060f0
SH		 1910int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
1911{
1912 struct rdma_id_private *id_priv;
1913 int ret;
1914
1915 id_priv = container_of(id, struct rdma_id_private, id);
1916 if (!cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_CONNECT))
1917 return -EINVAL;
1918
1919 if (!id->qp) {
1920 id_priv->qp_num = conn_param->qp_num;
1921 id_priv->qp_type = conn_param->qp_type;
1922 id_priv->srq = conn_param->srq;
1923 }
1924
07ebafba
TT		 1925 switch (rdma_node_get_transport(id->device->node_type)) {
1926 case RDMA_TRANSPORT_IB:
e51060f0
SH		 1927 ret = cma_connect_ib(id_priv, conn_param);
1928 break;
07ebafba
TT		 1929 case RDMA_TRANSPORT_IWARP:
1930 ret = cma_connect_iw(id_priv, conn_param);
1931 break;
e51060f0
SH		 1932 default:
1933 ret = -ENOSYS;
1934 break;
1935 }
1936 if (ret)
1937 goto err;
1938
1939 return 0;
1940err:
1941 cma_comp_exch(id_priv, CMA_CONNECT, CMA_ROUTE_RESOLVED);
1942 return ret;
1943}
1944EXPORT_SYMBOL(rdma_connect);
1945
1946static int cma_accept_ib(struct rdma_id_private *id_priv,
1947 struct rdma_conn_param *conn_param)
1948{
1949 struct ib_cm_rep_param rep;
1950 int ret;
1951
1952 ret = cma_modify_qp_rtr(&id_priv->id);
1953 if (ret)
1954 return ret;
1955
1956 memset(&rep, 0, sizeof rep);
1957 rep.qp_num = id_priv->qp_num;
1958 rep.starting_psn = id_priv->seq_num;
1959 rep.private_data = conn_param->private_data;
1960 rep.private_data_len = conn_param->private_data_len;
1961 rep.responder_resources = conn_param->responder_resources;
1962 rep.initiator_depth = conn_param->initiator_depth;
1963 rep.target_ack_delay = CMA_CM_RESPONSE_TIMEOUT;
1964 rep.failover_accepted = 0;
1965 rep.flow_control = conn_param->flow_control;
1966 rep.rnr_retry_count = conn_param->rnr_retry_count;
1967 rep.srq = id_priv->srq ? 1 : 0;
1968
1969 return ib_send_cm_rep(id_priv->cm_id.ib, &rep);
1970}
1971
07ebafba
TT		 1972static int cma_accept_iw(struct rdma_id_private *id_priv,
1973 struct rdma_conn_param *conn_param)
1974{
1975 struct iw_cm_conn_param iw_param;
1976 int ret;
1977
1978 ret = cma_modify_qp_rtr(&id_priv->id);
1979 if (ret)
1980 return ret;
1981
1982 iw_param.ord = conn_param->initiator_depth;
1983 iw_param.ird = conn_param->responder_resources;
1984 iw_param.private_data = conn_param->private_data;
1985 iw_param.private_data_len = conn_param->private_data_len;
1986 if (id_priv->id.qp) {
1987 iw_param.qpn = id_priv->qp_num;
1988 } else
1989 iw_param.qpn = conn_param->qp_num;
1990
1991 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
1992}
1993
e51060f0
SH		 1994int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
1995{
1996 struct rdma_id_private *id_priv;
1997 int ret;
1998
1999 id_priv = container_of(id, struct rdma_id_private, id);
2000 if (!cma_comp(id_priv, CMA_CONNECT))
2001 return -EINVAL;
2002
2003 if (!id->qp && conn_param) {
2004 id_priv->qp_num = conn_param->qp_num;
2005 id_priv->qp_type = conn_param->qp_type;
2006 id_priv->srq = conn_param->srq;
2007 }
2008
07ebafba
TT		 2009 switch (rdma_node_get_transport(id->device->node_type)) {
2010 case RDMA_TRANSPORT_IB:
e51060f0
SH		 2011 if (conn_param)
2012 ret = cma_accept_ib(id_priv, conn_param);
2013 else
2014 ret = cma_rep_recv(id_priv);
2015 break;
07ebafba
TT		 2016 case RDMA_TRANSPORT_IWARP:
2017 ret = cma_accept_iw(id_priv, conn_param);
2018 break;
e51060f0
SH		 2019 default:
2020 ret = -ENOSYS;
2021 break;
2022 }
2023
2024 if (ret)
2025 goto reject;
2026
2027 return 0;
2028reject:
2029 cma_modify_qp_err(id);
2030 rdma_reject(id, NULL, 0);
2031 return ret;
2032}
2033EXPORT_SYMBOL(rdma_accept);
2034
2035int rdma_reject(struct rdma_cm_id *id, const void *private_data,
2036 u8 private_data_len)
2037{
2038 struct rdma_id_private *id_priv;
2039 int ret;
2040
2041 id_priv = container_of(id, struct rdma_id_private, id);
2042 if (!cma_comp(id_priv, CMA_CONNECT))
2043 return -EINVAL;
2044
07ebafba
TT		 2045 switch (rdma_node_get_transport(id->device->node_type)) {
2046 case RDMA_TRANSPORT_IB:
e51060f0
SH		 2047 ret = ib_send_cm_rej(id_priv->cm_id.ib,
2048 IB_CM_REJ_CONSUMER_DEFINED, NULL, 0,
2049 private_data, private_data_len);
2050 break;
07ebafba
TT		 2051 case RDMA_TRANSPORT_IWARP:
2052 ret = iw_cm_reject(id_priv->cm_id.iw,
2053 private_data, private_data_len);
2054 break;
e51060f0
SH		 2055 default:
2056 ret = -ENOSYS;
2057 break;
2058 }
2059 return ret;
2060}
2061EXPORT_SYMBOL(rdma_reject);
2062
2063int rdma_disconnect(struct rdma_cm_id *id)
2064{
2065 struct rdma_id_private *id_priv;
2066 int ret;
2067
2068 id_priv = container_of(id, struct rdma_id_private, id);
2069 if (!cma_comp(id_priv, CMA_CONNECT) &&
2070 !cma_comp(id_priv, CMA_DISCONNECT))
2071 return -EINVAL;
2072
07ebafba
TT		 2073 switch (rdma_node_get_transport(id->device->node_type)) {
2074 case RDMA_TRANSPORT_IB:
2075 ret = cma_modify_qp_err(id);
2076 if (ret)
2077 goto out;
e51060f0
SH		 2078 /* Initiate or respond to a disconnect. */
2079 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
2080 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
2081 break;
07ebafba
TT		 2082 case RDMA_TRANSPORT_IWARP:
2083 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
2084 break;
e51060f0 2085 default:
07ebafba 2086 ret = -EINVAL;
e51060f0
SH		 2087 break;
2088 }
2089out:
2090 return ret;
2091}
2092EXPORT_SYMBOL(rdma_disconnect);
2093
2094static void cma_add_one(struct ib_device *device)
2095{
2096 struct cma_device *cma_dev;
2097 struct rdma_id_private *id_priv;
2098
2099 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
2100 if (!cma_dev)
2101 return;
2102
2103 cma_dev->device = device;
2104 cma_dev->node_guid = device->node_guid;
2105 if (!cma_dev->node_guid)
2106 goto err;
2107
2108 init_completion(&cma_dev->comp);
2109 atomic_set(&cma_dev->refcount, 1);
2110 INIT_LIST_HEAD(&cma_dev->id_list);
2111 ib_set_client_data(device, &cma_client, cma_dev);
2112
2113 mutex_lock(&lock);
2114 list_add_tail(&cma_dev->list, &dev_list);
2115 list_for_each_entry(id_priv, &listen_any_list, list)
2116 cma_listen_on_dev(id_priv, cma_dev);
2117 mutex_unlock(&lock);
2118 return;
2119err:
2120 kfree(cma_dev);
2121}
2122
2123static int cma_remove_id_dev(struct rdma_id_private *id_priv)
2124{
2125 enum cma_state state;
2126
2127 /* Record that we want to remove the device */
2128 state = cma_exch(id_priv, CMA_DEVICE_REMOVAL);
2129 if (state == CMA_DESTROYING)
2130 return 0;
2131
2132 cma_cancel_operation(id_priv, state);
2133 wait_event(id_priv->wait_remove, !atomic_read(&id_priv->dev_remove));
2134
2135 /* Check for destruction from another callback. */
2136 if (!cma_comp(id_priv, CMA_DEVICE_REMOVAL))
2137 return 0;
2138
2139 return cma_notify_user(id_priv, RDMA_CM_EVENT_DEVICE_REMOVAL,
2140 0, NULL, 0);
2141}
2142
2143static void cma_process_remove(struct cma_device *cma_dev)
2144{
2145 struct list_head remove_list;
2146 struct rdma_id_private *id_priv;
2147 int ret;
2148
2149 INIT_LIST_HEAD(&remove_list);
2150
2151 mutex_lock(&lock);
2152 while (!list_empty(&cma_dev->id_list)) {
2153 id_priv = list_entry(cma_dev->id_list.next,
2154 struct rdma_id_private, list);
2155
2156 if (cma_internal_listen(id_priv)) {
2157 cma_destroy_listen(id_priv);
2158 continue;
2159 }
2160
2161 list_del(&id_priv->list);
2162 list_add_tail(&id_priv->list, &remove_list);
2163 atomic_inc(&id_priv->refcount);
2164 mutex_unlock(&lock);
2165
2166 ret = cma_remove_id_dev(id_priv);
2167 cma_deref_id(id_priv);
2168 if (ret)
2169 rdma_destroy_id(&id_priv->id);
2170
2171 mutex_lock(&lock);
2172 }
2173 mutex_unlock(&lock);
2174
2175 cma_deref_dev(cma_dev);
2176 wait_for_completion(&cma_dev->comp);
2177}
2178
2179static void cma_remove_one(struct ib_device *device)
2180{
2181 struct cma_device *cma_dev;
2182
2183 cma_dev = ib_get_client_data(device, &cma_client);
2184 if (!cma_dev)
2185 return;
2186
2187 mutex_lock(&lock);
2188 list_del(&cma_dev->list);
2189 mutex_unlock(&lock);
2190
2191 cma_process_remove(cma_dev);
2192 kfree(cma_dev);
2193}
2194
2195static int cma_init(void)
2196{
2197 int ret;
2198
2199 cma_wq = create_singlethread_workqueue("rdma_cm_wq");
2200 if (!cma_wq)
2201 return -ENOMEM;
2202
c1a0b23b
MT		 2203 ib_sa_register_client(&sa_client);
2204
e51060f0
SH		 2205 ret = ib_register_client(&cma_client);
2206 if (ret)
2207 goto err;
2208 return 0;
2209
2210err:
c1a0b23b 2211 ib_sa_unregister_client(&sa_client);
e51060f0
SH		 2212 destroy_workqueue(cma_wq);
2213 return ret;
2214}
2215
2216static void cma_cleanup(void)
2217{
2218 ib_unregister_client(&cma_client);
c1a0b23b 2219 ib_sa_unregister_client(&sa_client);
e51060f0
SH		 2220 destroy_workqueue(cma_wq);
2221 idr_destroy(&sdp_ps);
2222 idr_destroy(&tcp_ps);
2223}
2224
2225module_init(cma_init);
2226module_exit(cma_cleanup);
kernel source for telekom puls (alcatel/mediatek)