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IB/iser: Start connection after enabling iSER
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / infiniband / core / cma.c
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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
3f168d2b
KK		 877 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
878 &ip_ver, &port, &src, &dst))
879 goto err;
880
e51060f0
SH		 881 id = rdma_create_id(listen_id->event_handler, listen_id->context,
882 listen_id->ps);
883 if (IS_ERR(id))
3f168d2b
KK		 884 goto err;
885
886 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
887 ip_ver, port, src, dst);
e51060f0
SH		 888
889 rt = &id->route;
890 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
3f168d2b
KK		 891 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
892 GFP_KERNEL);
e51060f0 893 if (!rt->path_rec)
3f168d2b 894 goto destroy_id;
e51060f0 895
e51060f0
SH		 896 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
897 if (rt->num_paths == 2)
898 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
899
900 ib_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
901 ib_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
902 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
07ebafba 903 rt->addr.dev_addr.dev_type = RDMA_NODE_IB_CA;
e51060f0
SH		 904
905 id_priv = container_of(id, struct rdma_id_private, id);
906 id_priv->state = CMA_CONNECT;
907 return id_priv;
3f168d2b
KK		 908
909destroy_id:
e51060f0 910 rdma_destroy_id(id);
3f168d2b 911err:
e51060f0
SH		 912 return NULL;
913}
914
915static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
916{
917 struct rdma_id_private *listen_id, *conn_id;
918 int offset, ret;
919
920 listen_id = cm_id->context;
921 atomic_inc(&listen_id->dev_remove);
922 if (!cma_comp(listen_id, CMA_LISTEN)) {
923 ret = -ECONNABORTED;
924 goto out;
925 }
926
927 conn_id = cma_new_id(&listen_id->id, ib_event);
928 if (!conn_id) {
929 ret = -ENOMEM;
930 goto out;
931 }
932
933 atomic_inc(&conn_id->dev_remove);
61a73c70 934 mutex_lock(&lock);
07ebafba 935 ret = cma_acquire_dev(conn_id);
61a73c70 936 mutex_unlock(&lock);
e51060f0
SH		 937 if (ret) {
938 ret = -ENODEV;
6e35aabe 939 cma_exch(conn_id, CMA_DESTROYING);
e51060f0
SH		 940 cma_release_remove(conn_id);
941 rdma_destroy_id(&conn_id->id);
942 goto out;
943 }
944
945 conn_id->cm_id.ib = cm_id;
946 cm_id->context = conn_id;
947 cm_id->cm_handler = cma_ib_handler;
948
949 offset = cma_user_data_offset(listen_id->id.ps);
950 ret = cma_notify_user(conn_id, RDMA_CM_EVENT_CONNECT_REQUEST, 0,
951 ib_event->private_data + offset,
952 IB_CM_REQ_PRIVATE_DATA_SIZE - offset);
953 if (ret) {
954 /* Destroy the CM ID by returning a non-zero value. */
955 conn_id->cm_id.ib = NULL;
956 cma_exch(conn_id, CMA_DESTROYING);
957 cma_release_remove(conn_id);
958 rdma_destroy_id(&conn_id->id);
959 }
960out:
961 cma_release_remove(listen_id);
962 return ret;
963}
964
965static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr)
966{
967 return cpu_to_be64(((u64)ps << 16) +
968 be16_to_cpu(((struct sockaddr_in *) addr)->sin_port));
969}
970
971static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr,
972 struct ib_cm_compare_data *compare)
973{
974 struct cma_hdr *cma_data, *cma_mask;
975 struct sdp_hh *sdp_data, *sdp_mask;
976 __u32 ip4_addr;
977 struct in6_addr ip6_addr;
978
979 memset(compare, 0, sizeof *compare);
980 cma_data = (void *) compare->data;
981 cma_mask = (void *) compare->mask;
982 sdp_data = (void *) compare->data;
983 sdp_mask = (void *) compare->mask;
984
985 switch (addr->sa_family) {
986 case AF_INET:
987 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
988 if (ps == RDMA_PS_SDP) {
989 sdp_set_ip_ver(sdp_data, 4);
990 sdp_set_ip_ver(sdp_mask, 0xF);
991 sdp_data->dst_addr.ip4.addr = ip4_addr;
992 sdp_mask->dst_addr.ip4.addr = ~0;
993 } else {
994 cma_set_ip_ver(cma_data, 4);
995 cma_set_ip_ver(cma_mask, 0xF);
996 cma_data->dst_addr.ip4.addr = ip4_addr;
997 cma_mask->dst_addr.ip4.addr = ~0;
998 }
999 break;
1000 case AF_INET6:
1001 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr;
1002 if (ps == RDMA_PS_SDP) {
1003 sdp_set_ip_ver(sdp_data, 6);
1004 sdp_set_ip_ver(sdp_mask, 0xF);
1005 sdp_data->dst_addr.ip6 = ip6_addr;
1006 memset(&sdp_mask->dst_addr.ip6, 0xFF,
1007 sizeof sdp_mask->dst_addr.ip6);
1008 } else {
1009 cma_set_ip_ver(cma_data, 6);
1010 cma_set_ip_ver(cma_mask, 0xF);
1011 cma_data->dst_addr.ip6 = ip6_addr;
1012 memset(&cma_mask->dst_addr.ip6, 0xFF,
1013 sizeof cma_mask->dst_addr.ip6);
1014 }
1015 break;
1016 default:
1017 break;
1018 }
1019}
1020
07ebafba
TT		 1021static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1022{
1023 struct rdma_id_private *id_priv = iw_id->context;
1024 enum rdma_cm_event_type event = 0;
1025 struct sockaddr_in *sin;
1026 int ret = 0;
1027
1028 atomic_inc(&id_priv->dev_remove);
1029
1030 switch (iw_event->event) {
1031 case IW_CM_EVENT_CLOSE:
1032 event = RDMA_CM_EVENT_DISCONNECTED;
1033 break;
1034 case IW_CM_EVENT_CONNECT_REPLY:
1035 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1036 *sin = iw_event->local_addr;
1037 sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr;
1038 *sin = iw_event->remote_addr;
1039 if (iw_event->status)
1040 event = RDMA_CM_EVENT_REJECTED;
1041 else
1042 event = RDMA_CM_EVENT_ESTABLISHED;
1043 break;
1044 case IW_CM_EVENT_ESTABLISHED:
1045 event = RDMA_CM_EVENT_ESTABLISHED;
1046 break;
1047 default:
1048 BUG_ON(1);
1049 }
1050
1051 ret = cma_notify_user(id_priv, event, iw_event->status,
1052 iw_event->private_data,
1053 iw_event->private_data_len);
1054 if (ret) {
1055 /* Destroy the CM ID by returning a non-zero value. */
1056 id_priv->cm_id.iw = NULL;
1057 cma_exch(id_priv, CMA_DESTROYING);
1058 cma_release_remove(id_priv);
1059 rdma_destroy_id(&id_priv->id);
1060 return ret;
1061 }
1062
1063 cma_release_remove(id_priv);
1064 return ret;
1065}
1066
1067static int iw_conn_req_handler(struct iw_cm_id *cm_id,
1068 struct iw_cm_event *iw_event)
1069{
1070 struct rdma_cm_id *new_cm_id;
1071 struct rdma_id_private *listen_id, *conn_id;
1072 struct sockaddr_in *sin;
1073 struct net_device *dev = NULL;
1074 int ret;
1075
1076 listen_id = cm_id->context;
1077 atomic_inc(&listen_id->dev_remove);
1078 if (!cma_comp(listen_id, CMA_LISTEN)) {
1079 ret = -ECONNABORTED;
1080 goto out;
1081 }
1082
1083 /* Create a new RDMA id for the new IW CM ID */
1084 new_cm_id = rdma_create_id(listen_id->id.event_handler,
1085 listen_id->id.context,
1086 RDMA_PS_TCP);
1087 if (!new_cm_id) {
1088 ret = -ENOMEM;
1089 goto out;
1090 }
1091 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
1092 atomic_inc(&conn_id->dev_remove);
1093 conn_id->state = CMA_CONNECT;
1094
1095 dev = ip_dev_find(iw_event->local_addr.sin_addr.s_addr);
1096 if (!dev) {
1097 ret = -EADDRNOTAVAIL;
1098 cma_release_remove(conn_id);
1099 rdma_destroy_id(new_cm_id);
1100 goto out;
1101 }
1102 ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL);
1103 if (ret) {
1104 cma_release_remove(conn_id);
1105 rdma_destroy_id(new_cm_id);
1106 goto out;
1107 }
1108
61a73c70 1109 mutex_lock(&lock);
07ebafba 1110 ret = cma_acquire_dev(conn_id);
61a73c70 1111 mutex_unlock(&lock);
07ebafba
TT		 1112 if (ret) {
1113 cma_release_remove(conn_id);
1114 rdma_destroy_id(new_cm_id);
1115 goto out;
1116 }
1117
1118 conn_id->cm_id.iw = cm_id;
1119 cm_id->context = conn_id;
1120 cm_id->cm_handler = cma_iw_handler;
1121
1122 sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr;
1123 *sin = iw_event->local_addr;
1124 sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr;
1125 *sin = iw_event->remote_addr;
1126
1127 ret = cma_notify_user(conn_id, RDMA_CM_EVENT_CONNECT_REQUEST, 0,
1128 iw_event->private_data,
1129 iw_event->private_data_len);
1130 if (ret) {
1131 /* User wants to destroy the CM ID */
1132 conn_id->cm_id.iw = NULL;
1133 cma_exch(conn_id, CMA_DESTROYING);
1134 cma_release_remove(conn_id);
1135 rdma_destroy_id(&conn_id->id);
1136 }
1137
1138out:
1139 if (dev)
1140 dev_put(dev);
1141 cma_release_remove(listen_id);
1142 return ret;
1143}
1144
e51060f0
SH		 1145static int cma_ib_listen(struct rdma_id_private *id_priv)
1146{
1147 struct ib_cm_compare_data compare_data;
1148 struct sockaddr *addr;
1149 __be64 svc_id;
1150 int ret;
1151
1152 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_req_handler,
1153 id_priv);
1154 if (IS_ERR(id_priv->cm_id.ib))
1155 return PTR_ERR(id_priv->cm_id.ib);
1156
1157 addr = &id_priv->id.route.addr.src_addr;
1158 svc_id = cma_get_service_id(id_priv->id.ps, addr);
1159 if (cma_any_addr(addr))
1160 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL);
1161 else {
1162 cma_set_compare_data(id_priv->id.ps, addr, &compare_data);
1163 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data);
1164 }
1165
1166 if (ret) {
1167 ib_destroy_cm_id(id_priv->cm_id.ib);
1168 id_priv->cm_id.ib = NULL;
1169 }
1170
1171 return ret;
1172}
1173
07ebafba
TT		 1174static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
1175{
1176 int ret;
1177 struct sockaddr_in *sin;
1178
1179 id_priv->cm_id.iw = iw_create_cm_id(id_priv->id.device,
1180 iw_conn_req_handler,
1181 id_priv);
1182 if (IS_ERR(id_priv->cm_id.iw))
1183 return PTR_ERR(id_priv->cm_id.iw);
1184
1185 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1186 id_priv->cm_id.iw->local_addr = *sin;
1187
1188 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
1189
1190 if (ret) {
1191 iw_destroy_cm_id(id_priv->cm_id.iw);
1192 id_priv->cm_id.iw = NULL;
1193 }
1194
1195 return ret;
1196}
1197
e51060f0
SH		 1198static int cma_listen_handler(struct rdma_cm_id *id,
1199 struct rdma_cm_event *event)
1200{
1201 struct rdma_id_private *id_priv = id->context;
1202
1203 id->context = id_priv->id.context;
1204 id->event_handler = id_priv->id.event_handler;
1205 return id_priv->id.event_handler(id, event);
1206}
1207
1208static void cma_listen_on_dev(struct rdma_id_private *id_priv,
1209 struct cma_device *cma_dev)
1210{
1211 struct rdma_id_private *dev_id_priv;
1212 struct rdma_cm_id *id;
1213 int ret;
1214
1215 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps);
1216 if (IS_ERR(id))
1217 return;
1218
1219 dev_id_priv = container_of(id, struct rdma_id_private, id);
1220
1221 dev_id_priv->state = CMA_ADDR_BOUND;
1222 memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr,
1223 ip_addr_size(&id_priv->id.route.addr.src_addr));
1224
1225 cma_attach_to_dev(dev_id_priv, cma_dev);
1226 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
1227
1228 ret = rdma_listen(id, id_priv->backlog);
1229 if (ret)
1230 goto err;
1231
1232 return;
1233err:
1234 cma_destroy_listen(dev_id_priv);
1235}
1236
1237static void cma_listen_on_all(struct rdma_id_private *id_priv)
1238{
1239 struct cma_device *cma_dev;
1240
1241 mutex_lock(&lock);
1242 list_add_tail(&id_priv->list, &listen_any_list);
1243 list_for_each_entry(cma_dev, &dev_list, list)
1244 cma_listen_on_dev(id_priv, cma_dev);
1245 mutex_unlock(&lock);
1246}
1247
1248static int cma_bind_any(struct rdma_cm_id *id, sa_family_t af)
1249{
1250 struct sockaddr_in addr_in;
1251
1252 memset(&addr_in, 0, sizeof addr_in);
1253 addr_in.sin_family = af;
1254 return rdma_bind_addr(id, (struct sockaddr *) &addr_in);
1255}
1256
1257int rdma_listen(struct rdma_cm_id *id, int backlog)
1258{
1259 struct rdma_id_private *id_priv;
1260 int ret;
1261
1262 id_priv = container_of(id, struct rdma_id_private, id);
1263 if (id_priv->state == CMA_IDLE) {
1264 ret = cma_bind_any(id, AF_INET);
1265 if (ret)
1266 return ret;
1267 }
1268
1269 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_LISTEN))
1270 return -EINVAL;
1271
1272 id_priv->backlog = backlog;
1273 if (id->device) {
07ebafba
TT		 1274 switch (rdma_node_get_transport(id->device->node_type)) {
1275 case RDMA_TRANSPORT_IB:
e51060f0
SH		 1276 ret = cma_ib_listen(id_priv);
1277 if (ret)
1278 goto err;
1279 break;
07ebafba
TT		 1280 case RDMA_TRANSPORT_IWARP:
1281 ret = cma_iw_listen(id_priv, backlog);
1282 if (ret)
1283 goto err;
1284 break;
e51060f0
SH		 1285 default:
1286 ret = -ENOSYS;
1287 goto err;
1288 }
1289 } else
1290 cma_listen_on_all(id_priv);
1291
1292 return 0;
1293err:
1294 id_priv->backlog = 0;
1295 cma_comp_exch(id_priv, CMA_LISTEN, CMA_ADDR_BOUND);
1296 return ret;
1297}
1298EXPORT_SYMBOL(rdma_listen);
1299
1300static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
1301 void *context)
1302{
1303 struct cma_work *work = context;
1304 struct rdma_route *route;
1305
1306 route = &work->id->id.route;
1307
1308 if (!status) {
1309 route->num_paths = 1;
1310 *route->path_rec = *path_rec;
1311 } else {
1312 work->old_state = CMA_ROUTE_QUERY;
1313 work->new_state = CMA_ADDR_RESOLVED;
1314 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
8f0472d3 1315 work->event.status = status;
e51060f0
SH		 1316 }
1317
1318 queue_work(cma_wq, &work->work);
1319}
1320
1321static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
1322 struct cma_work *work)
1323{
1324 struct rdma_dev_addr *addr = &id_priv->id.route.addr.dev_addr;
1325 struct ib_sa_path_rec path_rec;
1326
1327 memset(&path_rec, 0, sizeof path_rec);
f0ee3404
MT		 1328 ib_addr_get_sgid(addr, &path_rec.sgid);
1329 ib_addr_get_dgid(addr, &path_rec.dgid);
e51060f0
SH		 1330 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(addr));
1331 path_rec.numb_path = 1;
1332
c1a0b23b 1333 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
e51060f0
SH		 1334 id_priv->id.port_num, &path_rec,
1335 IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
1336 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH,
1337 timeout_ms, GFP_KERNEL,
1338 cma_query_handler, work, &id_priv->query);
1339
1340 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
1341}
1342
1343static void cma_work_handler(void *data)
1344{
1345 struct cma_work *work = data;
1346 struct rdma_id_private *id_priv = work->id;
1347 int destroy = 0;
1348
1349 atomic_inc(&id_priv->dev_remove);
1350 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
1351 goto out;
1352
1353 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1354 cma_exch(id_priv, CMA_DESTROYING);
1355 destroy = 1;
1356 }
1357out:
1358 cma_release_remove(id_priv);
1359 cma_deref_id(id_priv);
1360 if (destroy)
1361 rdma_destroy_id(&id_priv->id);
1362 kfree(work);
1363}
1364
1365static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
1366{
1367 struct rdma_route *route = &id_priv->id.route;
1368 struct cma_work *work;
1369 int ret;
1370
1371 work = kzalloc(sizeof *work, GFP_KERNEL);
1372 if (!work)
1373 return -ENOMEM;
1374
1375 work->id = id_priv;
1376 INIT_WORK(&work->work, cma_work_handler, work);
1377 work->old_state = CMA_ROUTE_QUERY;
1378 work->new_state = CMA_ROUTE_RESOLVED;
1379 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1380
1381 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
1382 if (!route->path_rec) {
1383 ret = -ENOMEM;
1384 goto err1;
1385 }
1386
1387 ret = cma_query_ib_route(id_priv, timeout_ms, work);
1388 if (ret)
1389 goto err2;
1390
1391 return 0;
1392err2:
1393 kfree(route->path_rec);
1394 route->path_rec = NULL;
1395err1:
1396 kfree(work);
1397 return ret;
1398}
1399
1400int rdma_set_ib_paths(struct rdma_cm_id *id,
1401 struct ib_sa_path_rec *path_rec, int num_paths)
1402{
1403 struct rdma_id_private *id_priv;
1404 int ret;
1405
1406 id_priv = container_of(id, struct rdma_id_private, id);
1407 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_RESOLVED))
1408 return -EINVAL;
1409
1410 id->route.path_rec = kmalloc(sizeof *path_rec * num_paths, GFP_KERNEL);
1411 if (!id->route.path_rec) {
1412 ret = -ENOMEM;
1413 goto err;
1414 }
1415
1416 memcpy(id->route.path_rec, path_rec, sizeof *path_rec * num_paths);
1417 return 0;
1418err:
1419 cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_ADDR_RESOLVED);
1420 return ret;
1421}
1422EXPORT_SYMBOL(rdma_set_ib_paths);
1423
07ebafba
TT		 1424static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
1425{
1426 struct cma_work *work;
1427
1428 work = kzalloc(sizeof *work, GFP_KERNEL);
1429 if (!work)
1430 return -ENOMEM;
1431
1432 work->id = id_priv;
1433 INIT_WORK(&work->work, cma_work_handler, work);
1434 work->old_state = CMA_ROUTE_QUERY;
1435 work->new_state = CMA_ROUTE_RESOLVED;
1436 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1437 queue_work(cma_wq, &work->work);
1438 return 0;
1439}
1440
e51060f0
SH		 1441int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
1442{
1443 struct rdma_id_private *id_priv;
1444 int ret;
1445
1446 id_priv = container_of(id, struct rdma_id_private, id);
1447 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_QUERY))
1448 return -EINVAL;
1449
1450 atomic_inc(&id_priv->refcount);
07ebafba
TT		 1451 switch (rdma_node_get_transport(id->device->node_type)) {
1452 case RDMA_TRANSPORT_IB:
e51060f0
SH		 1453 ret = cma_resolve_ib_route(id_priv, timeout_ms);
1454 break;
07ebafba
TT		 1455 case RDMA_TRANSPORT_IWARP:
1456 ret = cma_resolve_iw_route(id_priv, timeout_ms);
1457 break;
e51060f0
SH		 1458 default:
1459 ret = -ENOSYS;
1460 break;
1461 }
1462 if (ret)
1463 goto err;
1464
1465 return 0;
1466err:
1467 cma_comp_exch(id_priv, CMA_ROUTE_QUERY, CMA_ADDR_RESOLVED);
1468 cma_deref_id(id_priv);
1469 return ret;
1470}
1471EXPORT_SYMBOL(rdma_resolve_route);
1472
1473static int cma_bind_loopback(struct rdma_id_private *id_priv)
1474{
1475 struct cma_device *cma_dev;
1476 struct ib_port_attr port_attr;
f0ee3404 1477 union ib_gid gid;
e51060f0
SH		 1478 u16 pkey;
1479 int ret;
1480 u8 p;
1481
1482 mutex_lock(&lock);
1483 list_for_each_entry(cma_dev, &dev_list, list)
1484 for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p)
1485 if (!ib_query_port (cma_dev->device, p, &port_attr) &&
1486 port_attr.state == IB_PORT_ACTIVE)
1487 goto port_found;
1488
1489 if (!list_empty(&dev_list)) {
1490 p = 1;
1491 cma_dev = list_entry(dev_list.next, struct cma_device, list);
1492 } else {
1493 ret = -ENODEV;
1494 goto out;
1495 }
1496
1497port_found:
f0ee3404 1498 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid);
e51060f0
SH		 1499 if (ret)
1500 goto out;
1501
1502 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
1503 if (ret)
1504 goto out;
1505
f0ee3404 1506 ib_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0
SH		 1507 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
1508 id_priv->id.port_num = p;
1509 cma_attach_to_dev(id_priv, cma_dev);
1510out:
1511 mutex_unlock(&lock);
1512 return ret;
1513}
1514
1515static void addr_handler(int status, struct sockaddr *src_addr,
1516 struct rdma_dev_addr *dev_addr, void *context)
1517{
1518 struct rdma_id_private *id_priv = context;
1519 enum rdma_cm_event_type event;
1520
1521 atomic_inc(&id_priv->dev_remove);
61a73c70
SH		 1522
1523 /*
1524 * Grab mutex to block rdma_destroy_id() from removing the device while
1525 * we're trying to acquire it.
1526 */
1527 mutex_lock(&lock);
1528 if (!cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_RESOLVED)) {
1529 mutex_unlock(&lock);
1530 goto out;
1531 }
1532
1533 if (!status && !id_priv->cma_dev)
e51060f0 1534 status = cma_acquire_dev(id_priv);
61a73c70 1535 mutex_unlock(&lock);
e51060f0
SH		 1536
1537 if (status) {
61a73c70 1538 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ADDR_BOUND))
e51060f0
SH		 1539 goto out;
1540 event = RDMA_CM_EVENT_ADDR_ERROR;
1541 } else {
e51060f0
SH		 1542 memcpy(&id_priv->id.route.addr.src_addr, src_addr,
1543 ip_addr_size(src_addr));
1544 event = RDMA_CM_EVENT_ADDR_RESOLVED;
1545 }
1546
1547 if (cma_notify_user(id_priv, event, status, NULL, 0)) {
1548 cma_exch(id_priv, CMA_DESTROYING);
1549 cma_release_remove(id_priv);
1550 cma_deref_id(id_priv);
1551 rdma_destroy_id(&id_priv->id);
1552 return;
1553 }
1554out:
1555 cma_release_remove(id_priv);
1556 cma_deref_id(id_priv);
1557}
1558
1559static int cma_resolve_loopback(struct rdma_id_private *id_priv)
1560{
1561 struct cma_work *work;
1562 struct sockaddr_in *src_in, *dst_in;
f0ee3404 1563 union ib_gid gid;
e51060f0
SH		 1564 int ret;
1565
1566 work = kzalloc(sizeof *work, GFP_KERNEL);
1567 if (!work)
1568 return -ENOMEM;
1569
1570 if (!id_priv->cma_dev) {
1571 ret = cma_bind_loopback(id_priv);
1572 if (ret)
1573 goto err;
1574 }
1575
f0ee3404
MT		 1576 ib_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
1577 ib_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0
SH		 1578
1579 if (cma_zero_addr(&id_priv->id.route.addr.src_addr)) {
1580 src_in = (struct sockaddr_in *)&id_priv->id.route.addr.src_addr;
1581 dst_in = (struct sockaddr_in *)&id_priv->id.route.addr.dst_addr;
1582 src_in->sin_family = dst_in->sin_family;
1583 src_in->sin_addr.s_addr = dst_in->sin_addr.s_addr;
1584 }
1585
1586 work->id = id_priv;
1587 INIT_WORK(&work->work, cma_work_handler, work);
1588 work->old_state = CMA_ADDR_QUERY;
1589 work->new_state = CMA_ADDR_RESOLVED;
1590 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
1591 queue_work(cma_wq, &work->work);
1592 return 0;
1593err:
1594 kfree(work);
1595 return ret;
1596}
1597
1598static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
1599 struct sockaddr *dst_addr)
1600{
1601 if (src_addr && src_addr->sa_family)
1602 return rdma_bind_addr(id, src_addr);
1603 else
1604 return cma_bind_any(id, dst_addr->sa_family);
1605}
1606
1607int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
1608 struct sockaddr *dst_addr, int timeout_ms)
1609{
1610 struct rdma_id_private *id_priv;
1611 int ret;
1612
1613 id_priv = container_of(id, struct rdma_id_private, id);
1614 if (id_priv->state == CMA_IDLE) {
1615 ret = cma_bind_addr(id, src_addr, dst_addr);
1616 if (ret)
1617 return ret;
1618 }
1619
1620 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_ADDR_QUERY))
1621 return -EINVAL;
1622
1623 atomic_inc(&id_priv->refcount);
1624 memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr));
1625 if (cma_any_addr(dst_addr))
1626 ret = cma_resolve_loopback(id_priv);
1627 else
1628 ret = rdma_resolve_ip(&id->route.addr.src_addr, dst_addr,
1629 &id->route.addr.dev_addr,
1630 timeout_ms, addr_handler, id_priv);
1631 if (ret)
1632 goto err;
1633
1634 return 0;
1635err:
1636 cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_BOUND);
1637 cma_deref_id(id_priv);
1638 return ret;
1639}
1640EXPORT_SYMBOL(rdma_resolve_addr);
1641
1642static void cma_bind_port(struct rdma_bind_list *bind_list,
1643 struct rdma_id_private *id_priv)
1644{
1645 struct sockaddr_in *sin;
1646
1647 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1648 sin->sin_port = htons(bind_list->port);
1649 id_priv->bind_list = bind_list;
1650 hlist_add_head(&id_priv->node, &bind_list->owners);
1651}
1652
1653static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv,
1654 unsigned short snum)
1655{
1656 struct rdma_bind_list *bind_list;
1657 int port, start, ret;
1658
1659 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
1660 if (!bind_list)
1661 return -ENOMEM;
1662
1663 start = snum ? snum : sysctl_local_port_range[0];
1664
1665 do {
1666 ret = idr_get_new_above(ps, bind_list, start, &port);
1667 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL));
1668
1669 if (ret)
1670 goto err;
1671
1672 if ((snum && port != snum) ||
1673 (!snum && port > sysctl_local_port_range[1])) {
1674 idr_remove(ps, port);
1675 ret = -EADDRNOTAVAIL;
1676 goto err;
1677 }
1678
1679 bind_list->ps = ps;
1680 bind_list->port = (unsigned short) port;
1681 cma_bind_port(bind_list, id_priv);
1682 return 0;
1683err:
1684 kfree(bind_list);
1685 return ret;
1686}
1687
1688static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv)
1689{
1690 struct rdma_id_private *cur_id;
1691 struct sockaddr_in *sin, *cur_sin;
1692 struct rdma_bind_list *bind_list;
1693 struct hlist_node *node;
1694 unsigned short snum;
1695
1696 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1697 snum = ntohs(sin->sin_port);
1698 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
1699 return -EACCES;
1700
1701 bind_list = idr_find(ps, snum);
1702 if (!bind_list)
1703 return cma_alloc_port(ps, id_priv, snum);
1704
1705 /*
1706 * We don't support binding to any address if anyone is bound to
1707 * a specific address on the same port.
1708 */
1709 if (cma_any_addr(&id_priv->id.route.addr.src_addr))
1710 return -EADDRNOTAVAIL;
1711
1712 hlist_for_each_entry(cur_id, node, &bind_list->owners, node) {
1713 if (cma_any_addr(&cur_id->id.route.addr.src_addr))
1714 return -EADDRNOTAVAIL;
3cd96564 1715
e51060f0
SH		 1716 cur_sin = (struct sockaddr_in *) &cur_id->id.route.addr.src_addr;
1717 if (sin->sin_addr.s_addr == cur_sin->sin_addr.s_addr)
1718 return -EADDRINUSE;
1719 }
1720
1721 cma_bind_port(bind_list, id_priv);
1722 return 0;
1723}
1724
1725static int cma_get_port(struct rdma_id_private *id_priv)
1726{
1727 struct idr *ps;
1728 int ret;
1729
1730 switch (id_priv->id.ps) {
1731 case RDMA_PS_SDP:
1732 ps = &sdp_ps;
1733 break;
1734 case RDMA_PS_TCP:
1735 ps = &tcp_ps;
1736 break;
1737 default:
1738 return -EPROTONOSUPPORT;
1739 }
1740
1741 mutex_lock(&lock);
1742 if (cma_any_port(&id_priv->id.route.addr.src_addr))
1743 ret = cma_alloc_port(ps, id_priv, 0);
1744 else
1745 ret = cma_use_port(ps, id_priv);
1746 mutex_unlock(&lock);
1747
1748 return ret;
1749}
1750
1751int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
1752{
1753 struct rdma_id_private *id_priv;
1754 int ret;
1755
1756 if (addr->sa_family != AF_INET)
1757 return -EAFNOSUPPORT;
1758
1759 id_priv = container_of(id, struct rdma_id_private, id);
1760 if (!cma_comp_exch(id_priv, CMA_IDLE, CMA_ADDR_BOUND))
1761 return -EINVAL;
1762
1763 if (!cma_any_addr(addr)) {
1764 ret = rdma_translate_ip(addr, &id->route.addr.dev_addr);
61a73c70
SH		 1765 if (!ret) {
1766 mutex_lock(&lock);
e51060f0 1767 ret = cma_acquire_dev(id_priv);
61a73c70
SH		 1768 mutex_unlock(&lock);
1769 }
e51060f0
SH		 1770 if (ret)
1771 goto err;
1772 }
1773
1774 memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr));
1775 ret = cma_get_port(id_priv);
1776 if (ret)
1777 goto err;
1778
1779 return 0;
1780err:
1781 cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_IDLE);
1782 return ret;
1783}
1784EXPORT_SYMBOL(rdma_bind_addr);
1785
1786static int cma_format_hdr(void *hdr, enum rdma_port_space ps,
1787 struct rdma_route *route)
1788{
1789 struct sockaddr_in *src4, *dst4;
1790 struct cma_hdr *cma_hdr;
1791 struct sdp_hh *sdp_hdr;
1792
1793 src4 = (struct sockaddr_in *) &route->addr.src_addr;
1794 dst4 = (struct sockaddr_in *) &route->addr.dst_addr;
1795
1796 switch (ps) {
1797 case RDMA_PS_SDP:
1798 sdp_hdr = hdr;
1799 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
1800 return -EINVAL;
1801 sdp_set_ip_ver(sdp_hdr, 4);
1802 sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
1803 sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
1804 sdp_hdr->port = src4->sin_port;
1805 break;
1806 default:
1807 cma_hdr = hdr;
1808 cma_hdr->cma_version = CMA_VERSION;
1809 cma_set_ip_ver(cma_hdr, 4);
1810 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
1811 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
1812 cma_hdr->port = src4->sin_port;
1813 break;
1814 }
1815 return 0;
1816}
1817
1818static int cma_connect_ib(struct rdma_id_private *id_priv,
1819 struct rdma_conn_param *conn_param)
1820{
1821 struct ib_cm_req_param req;
1822 struct rdma_route *route;
1823 void *private_data;
1824 int offset, ret;
1825
1826 memset(&req, 0, sizeof req);
1827 offset = cma_user_data_offset(id_priv->id.ps);
1828 req.private_data_len = offset + conn_param->private_data_len;
1829 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
1830 if (!private_data)
1831 return -ENOMEM;
1832
1833 if (conn_param->private_data && conn_param->private_data_len)
1834 memcpy(private_data + offset, conn_param->private_data,
1835 conn_param->private_data_len);
1836
1837 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_ib_handler,
1838 id_priv);
1839 if (IS_ERR(id_priv->cm_id.ib)) {
1840 ret = PTR_ERR(id_priv->cm_id.ib);
1841 goto out;
1842 }
1843
1844 route = &id_priv->id.route;
1845 ret = cma_format_hdr(private_data, id_priv->id.ps, route);
1846 if (ret)
1847 goto out;
1848 req.private_data = private_data;
1849
1850 req.primary_path = &route->path_rec[0];
1851 if (route->num_paths == 2)
1852 req.alternate_path = &route->path_rec[1];
1853
1854 req.service_id = cma_get_service_id(id_priv->id.ps,
1855 &route->addr.dst_addr);
1856 req.qp_num = id_priv->qp_num;
1857 req.qp_type = id_priv->qp_type;
1858 req.starting_psn = id_priv->seq_num;
1859 req.responder_resources = conn_param->responder_resources;
1860 req.initiator_depth = conn_param->initiator_depth;
1861 req.flow_control = conn_param->flow_control;
1862 req.retry_count = conn_param->retry_count;
1863 req.rnr_retry_count = conn_param->rnr_retry_count;
1864 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
1865 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
1866 req.max_cm_retries = CMA_MAX_CM_RETRIES;
1867 req.srq = id_priv->srq ? 1 : 0;
1868
1869 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
1870out:
675a027c
KK		 1871 if (ret && !IS_ERR(id_priv->cm_id.ib)) {
1872 ib_destroy_cm_id(id_priv->cm_id.ib);
1873 id_priv->cm_id.ib = NULL;
1874 }
1875
e51060f0
SH		 1876 kfree(private_data);
1877 return ret;
1878}
1879
07ebafba
TT		 1880static int cma_connect_iw(struct rdma_id_private *id_priv,
1881 struct rdma_conn_param *conn_param)
1882{
1883 struct iw_cm_id *cm_id;
1884 struct sockaddr_in* sin;
1885 int ret;
1886 struct iw_cm_conn_param iw_param;
1887
1888 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
1889 if (IS_ERR(cm_id)) {
1890 ret = PTR_ERR(cm_id);
1891 goto out;
1892 }
1893
1894 id_priv->cm_id.iw = cm_id;
1895
1896 sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr;
1897 cm_id->local_addr = *sin;
1898
1899 sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr;
1900 cm_id->remote_addr = *sin;
1901
1902 ret = cma_modify_qp_rtr(&id_priv->id);
675a027c
KK		 1903 if (ret)
1904 goto out;
07ebafba
TT		 1905
1906 iw_param.ord = conn_param->initiator_depth;
1907 iw_param.ird = conn_param->responder_resources;
1908 iw_param.private_data = conn_param->private_data;
1909 iw_param.private_data_len = conn_param->private_data_len;
1910 if (id_priv->id.qp)
1911 iw_param.qpn = id_priv->qp_num;
1912 else
1913 iw_param.qpn = conn_param->qp_num;
1914 ret = iw_cm_connect(cm_id, &iw_param);
1915out:
675a027c
KK		 1916 if (ret && !IS_ERR(cm_id)) {
1917 iw_destroy_cm_id(cm_id);
1918 id_priv->cm_id.iw = NULL;
1919 }
07ebafba
TT		 1920 return ret;
1921}
1922
e51060f0
SH		 1923int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
1924{
1925 struct rdma_id_private *id_priv;
1926 int ret;
1927
1928 id_priv = container_of(id, struct rdma_id_private, id);
1929 if (!cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_CONNECT))
1930 return -EINVAL;
1931
1932 if (!id->qp) {
1933 id_priv->qp_num = conn_param->qp_num;
1934 id_priv->qp_type = conn_param->qp_type;
1935 id_priv->srq = conn_param->srq;
1936 }
1937
07ebafba
TT		 1938 switch (rdma_node_get_transport(id->device->node_type)) {
1939 case RDMA_TRANSPORT_IB:
e51060f0
SH		 1940 ret = cma_connect_ib(id_priv, conn_param);
1941 break;
07ebafba
TT		 1942 case RDMA_TRANSPORT_IWARP:
1943 ret = cma_connect_iw(id_priv, conn_param);
1944 break;
e51060f0
SH		 1945 default:
1946 ret = -ENOSYS;
1947 break;
1948 }
1949 if (ret)
1950 goto err;
1951
1952 return 0;
1953err:
1954 cma_comp_exch(id_priv, CMA_CONNECT, CMA_ROUTE_RESOLVED);
1955 return ret;
1956}
1957EXPORT_SYMBOL(rdma_connect);
1958
1959static int cma_accept_ib(struct rdma_id_private *id_priv,
1960 struct rdma_conn_param *conn_param)
1961{
1962 struct ib_cm_rep_param rep;
1963 int ret;
1964
1965 ret = cma_modify_qp_rtr(&id_priv->id);
1966 if (ret)
1967 return ret;
1968
1969 memset(&rep, 0, sizeof rep);
1970 rep.qp_num = id_priv->qp_num;
1971 rep.starting_psn = id_priv->seq_num;
1972 rep.private_data = conn_param->private_data;
1973 rep.private_data_len = conn_param->private_data_len;
1974 rep.responder_resources = conn_param->responder_resources;
1975 rep.initiator_depth = conn_param->initiator_depth;
1976 rep.target_ack_delay = CMA_CM_RESPONSE_TIMEOUT;
1977 rep.failover_accepted = 0;
1978 rep.flow_control = conn_param->flow_control;
1979 rep.rnr_retry_count = conn_param->rnr_retry_count;
1980 rep.srq = id_priv->srq ? 1 : 0;
1981
1982 return ib_send_cm_rep(id_priv->cm_id.ib, &rep);
1983}
1984
07ebafba
TT		 1985static int cma_accept_iw(struct rdma_id_private *id_priv,
1986 struct rdma_conn_param *conn_param)
1987{
1988 struct iw_cm_conn_param iw_param;
1989 int ret;
1990
1991 ret = cma_modify_qp_rtr(&id_priv->id);
1992 if (ret)
1993 return ret;
1994
1995 iw_param.ord = conn_param->initiator_depth;
1996 iw_param.ird = conn_param->responder_resources;
1997 iw_param.private_data = conn_param->private_data;
1998 iw_param.private_data_len = conn_param->private_data_len;
1999 if (id_priv->id.qp) {
2000 iw_param.qpn = id_priv->qp_num;
2001 } else
2002 iw_param.qpn = conn_param->qp_num;
2003
2004 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
2005}
2006
e51060f0
SH		 2007int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2008{
2009 struct rdma_id_private *id_priv;
2010 int ret;
2011
2012 id_priv = container_of(id, struct rdma_id_private, id);
2013 if (!cma_comp(id_priv, CMA_CONNECT))
2014 return -EINVAL;
2015
2016 if (!id->qp && conn_param) {
2017 id_priv->qp_num = conn_param->qp_num;
2018 id_priv->qp_type = conn_param->qp_type;
2019 id_priv->srq = conn_param->srq;
2020 }
2021
07ebafba
TT		 2022 switch (rdma_node_get_transport(id->device->node_type)) {
2023 case RDMA_TRANSPORT_IB:
e51060f0
SH		 2024 if (conn_param)
2025 ret = cma_accept_ib(id_priv, conn_param);
2026 else
2027 ret = cma_rep_recv(id_priv);
2028 break;
07ebafba
TT		 2029 case RDMA_TRANSPORT_IWARP:
2030 ret = cma_accept_iw(id_priv, conn_param);
2031 break;
e51060f0
SH		 2032 default:
2033 ret = -ENOSYS;
2034 break;
2035 }
2036
2037 if (ret)
2038 goto reject;
2039
2040 return 0;
2041reject:
2042 cma_modify_qp_err(id);
2043 rdma_reject(id, NULL, 0);
2044 return ret;
2045}
2046EXPORT_SYMBOL(rdma_accept);
2047
2048int rdma_reject(struct rdma_cm_id *id, const void *private_data,
2049 u8 private_data_len)
2050{
2051 struct rdma_id_private *id_priv;
2052 int ret;
2053
2054 id_priv = container_of(id, struct rdma_id_private, id);
2055 if (!cma_comp(id_priv, CMA_CONNECT))
2056 return -EINVAL;
2057
07ebafba
TT		 2058 switch (rdma_node_get_transport(id->device->node_type)) {
2059 case RDMA_TRANSPORT_IB:
e51060f0
SH		 2060 ret = ib_send_cm_rej(id_priv->cm_id.ib,
2061 IB_CM_REJ_CONSUMER_DEFINED, NULL, 0,
2062 private_data, private_data_len);
2063 break;
07ebafba
TT		 2064 case RDMA_TRANSPORT_IWARP:
2065 ret = iw_cm_reject(id_priv->cm_id.iw,
2066 private_data, private_data_len);
2067 break;
e51060f0
SH		 2068 default:
2069 ret = -ENOSYS;
2070 break;
2071 }
2072 return ret;
2073}
2074EXPORT_SYMBOL(rdma_reject);
2075
2076int rdma_disconnect(struct rdma_cm_id *id)
2077{
2078 struct rdma_id_private *id_priv;
2079 int ret;
2080
2081 id_priv = container_of(id, struct rdma_id_private, id);
2082 if (!cma_comp(id_priv, CMA_CONNECT) &&
2083 !cma_comp(id_priv, CMA_DISCONNECT))
2084 return -EINVAL;
2085
07ebafba
TT		 2086 switch (rdma_node_get_transport(id->device->node_type)) {
2087 case RDMA_TRANSPORT_IB:
2088 ret = cma_modify_qp_err(id);
2089 if (ret)
2090 goto out;
e51060f0
SH		 2091 /* Initiate or respond to a disconnect. */
2092 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
2093 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
2094 break;
07ebafba
TT		 2095 case RDMA_TRANSPORT_IWARP:
2096 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
2097 break;
e51060f0 2098 default:
07ebafba 2099 ret = -EINVAL;
e51060f0
SH		 2100 break;
2101 }
2102out:
2103 return ret;
2104}
2105EXPORT_SYMBOL(rdma_disconnect);
2106
2107static void cma_add_one(struct ib_device *device)
2108{
2109 struct cma_device *cma_dev;
2110 struct rdma_id_private *id_priv;
2111
2112 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
2113 if (!cma_dev)
2114 return;
2115
2116 cma_dev->device = device;
2117 cma_dev->node_guid = device->node_guid;
2118 if (!cma_dev->node_guid)
2119 goto err;
2120
2121 init_completion(&cma_dev->comp);
2122 atomic_set(&cma_dev->refcount, 1);
2123 INIT_LIST_HEAD(&cma_dev->id_list);
2124 ib_set_client_data(device, &cma_client, cma_dev);
2125
2126 mutex_lock(&lock);
2127 list_add_tail(&cma_dev->list, &dev_list);
2128 list_for_each_entry(id_priv, &listen_any_list, list)
2129 cma_listen_on_dev(id_priv, cma_dev);
2130 mutex_unlock(&lock);
2131 return;
2132err:
2133 kfree(cma_dev);
2134}
2135
2136static int cma_remove_id_dev(struct rdma_id_private *id_priv)
2137{
2138 enum cma_state state;
2139
2140 /* Record that we want to remove the device */
2141 state = cma_exch(id_priv, CMA_DEVICE_REMOVAL);
2142 if (state == CMA_DESTROYING)
2143 return 0;
2144
2145 cma_cancel_operation(id_priv, state);
2146 wait_event(id_priv->wait_remove, !atomic_read(&id_priv->dev_remove));
2147
2148 /* Check for destruction from another callback. */
2149 if (!cma_comp(id_priv, CMA_DEVICE_REMOVAL))
2150 return 0;
2151
2152 return cma_notify_user(id_priv, RDMA_CM_EVENT_DEVICE_REMOVAL,
2153 0, NULL, 0);
2154}
2155
2156static void cma_process_remove(struct cma_device *cma_dev)
2157{
e51060f0
SH		 2158 struct rdma_id_private *id_priv;
2159 int ret;
2160
e51060f0
SH		 2161 mutex_lock(&lock);
2162 while (!list_empty(&cma_dev->id_list)) {
2163 id_priv = list_entry(cma_dev->id_list.next,
2164 struct rdma_id_private, list);
2165
2166 if (cma_internal_listen(id_priv)) {
2167 cma_destroy_listen(id_priv);
2168 continue;
2169 }
2170
94de178a 2171 list_del_init(&id_priv->list);
e51060f0
SH		 2172 atomic_inc(&id_priv->refcount);
2173 mutex_unlock(&lock);
2174
2175 ret = cma_remove_id_dev(id_priv);
2176 cma_deref_id(id_priv);
2177 if (ret)
2178 rdma_destroy_id(&id_priv->id);
2179
2180 mutex_lock(&lock);
2181 }
2182 mutex_unlock(&lock);
2183
2184 cma_deref_dev(cma_dev);
2185 wait_for_completion(&cma_dev->comp);
2186}
2187
2188static void cma_remove_one(struct ib_device *device)
2189{
2190 struct cma_device *cma_dev;
2191
2192 cma_dev = ib_get_client_data(device, &cma_client);
2193 if (!cma_dev)
2194 return;
2195
2196 mutex_lock(&lock);
2197 list_del(&cma_dev->list);
2198 mutex_unlock(&lock);
2199
2200 cma_process_remove(cma_dev);
2201 kfree(cma_dev);
2202}
2203
2204static int cma_init(void)
2205{
2206 int ret;
2207
2208 cma_wq = create_singlethread_workqueue("rdma_cm_wq");
2209 if (!cma_wq)
2210 return -ENOMEM;
2211
c1a0b23b
MT		 2212 ib_sa_register_client(&sa_client);
2213
e51060f0
SH		 2214 ret = ib_register_client(&cma_client);
2215 if (ret)
2216 goto err;
2217 return 0;
2218
2219err:
c1a0b23b 2220 ib_sa_unregister_client(&sa_client);
e51060f0
SH		 2221 destroy_workqueue(cma_wq);
2222 return ret;
2223}
2224
2225static void cma_cleanup(void)
2226{
2227 ib_unregister_client(&cma_client);
c1a0b23b 2228 ib_sa_unregister_client(&sa_client);
e51060f0
SH		 2229 destroy_workqueue(cma_wq);
2230 idr_destroy(&sdp_ps);
2231 idr_destroy(&tcp_ps);
2232}
2233
2234module_init(cma_init);
2235module_exit(cma_cleanup);
kernel source for telekom puls (alcatel/mediatek)