projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
RDMA/cma: Add locking around QP accesses
[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
dcb3f974 55#define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
e51060f0
SH		 56
57static void cma_add_one(struct ib_device *device);
58static void cma_remove_one(struct ib_device *device);
59
60static struct ib_client cma_client = {
61 .name = "cma",
62 .add = cma_add_one,
63 .remove = cma_remove_one
64};
65
c1a0b23b 66static struct ib_sa_client sa_client;
7a118df3 67static struct rdma_addr_client addr_client;
e51060f0
SH		 68static LIST_HEAD(dev_list);
69static LIST_HEAD(listen_any_list);
70static DEFINE_MUTEX(lock);
71static struct workqueue_struct *cma_wq;
72static DEFINE_IDR(sdp_ps);
73static DEFINE_IDR(tcp_ps);
628e5f6d 74static DEFINE_IDR(udp_ps);
c8f6a362 75static DEFINE_IDR(ipoib_ps);
aedec080 76static int next_port;
e51060f0
SH		 77
78struct cma_device {
79 struct list_head list;
80 struct ib_device *device;
e51060f0
SH		 81 struct completion comp;
82 atomic_t refcount;
83 struct list_head id_list;
84};
85
86enum cma_state {
87 CMA_IDLE,
88 CMA_ADDR_QUERY,
89 CMA_ADDR_RESOLVED,
90 CMA_ROUTE_QUERY,
91 CMA_ROUTE_RESOLVED,
92 CMA_CONNECT,
93 CMA_DISCONNECT,
94 CMA_ADDR_BOUND,
95 CMA_LISTEN,
96 CMA_DEVICE_REMOVAL,
97 CMA_DESTROYING
98};
99
100struct rdma_bind_list {
101 struct idr *ps;
102 struct hlist_head owners;
103 unsigned short port;
104};
105
106/*
107 * Device removal can occur at anytime, so we need extra handling to
108 * serialize notifying the user of device removal with other callbacks.
109 * We do this by disabling removal notification while a callback is in process,
110 * and reporting it after the callback completes.
111 */
112struct rdma_id_private {
113 struct rdma_cm_id id;
114
115 struct rdma_bind_list *bind_list;
116 struct hlist_node node;
117 struct list_head list;
118 struct list_head listen_list;
119 struct cma_device *cma_dev;
c8f6a362 120 struct list_head mc_list;
e51060f0
SH		 121
122 enum cma_state state;
123 spinlock_t lock;
c5483388
SH		 124 struct mutex qp_mutex;
125
e51060f0
SH		 126 struct completion comp;
127 atomic_t refcount;
128 wait_queue_head_t wait_remove;
129 atomic_t dev_remove;
130
131 int backlog;
132 int timeout_ms;
133 struct ib_sa_query *query;
134 int query_id;
135 union {
136 struct ib_cm_id *ib;
07ebafba 137 struct iw_cm_id *iw;
e51060f0
SH		 138 } cm_id;
139
140 u32 seq_num;
c8f6a362 141 u32 qkey;
e51060f0 142 u32 qp_num;
e51060f0 143 u8 srq;
a81c994d 144 u8 tos;
e51060f0
SH		 145};
146
c8f6a362
SH		 147struct cma_multicast {
148 struct rdma_id_private *id_priv;
149 union {
150 struct ib_sa_multicast *ib;
151 } multicast;
152 struct list_head list;
153 void *context;
154 struct sockaddr addr;
155 u8 pad[sizeof(struct sockaddr_in6) -
156 sizeof(struct sockaddr)];
157};
158
e51060f0
SH		 159struct cma_work {
160 struct work_struct work;
161 struct rdma_id_private *id;
162 enum cma_state old_state;
163 enum cma_state new_state;
164 struct rdma_cm_event event;
165};
166
167union cma_ip_addr {
168 struct in6_addr ip6;
169 struct {
170 __u32 pad[3];
171 __u32 addr;
172 } ip4;
173};
174
175struct cma_hdr {
176 u8 cma_version;
177 u8 ip_version; /* IP version: 7:4 */
178 __u16 port;
179 union cma_ip_addr src_addr;
180 union cma_ip_addr dst_addr;
181};
182
183struct sdp_hh {
184 u8 bsdh[16];
185 u8 sdp_version; /* Major version: 7:4 */
186 u8 ip_version; /* IP version: 7:4 */
187 u8 sdp_specific1[10];
188 __u16 port;
189 __u16 sdp_specific2;
190 union cma_ip_addr src_addr;
191 union cma_ip_addr dst_addr;
192};
193
194struct sdp_hah {
195 u8 bsdh[16];
196 u8 sdp_version;
197};
198
199#define CMA_VERSION 0x00
200#define SDP_MAJ_VERSION 0x2
201
202static int cma_comp(struct rdma_id_private *id_priv, enum cma_state comp)
203{
204 unsigned long flags;
205 int ret;
206
207 spin_lock_irqsave(&id_priv->lock, flags);
208 ret = (id_priv->state == comp);
209 spin_unlock_irqrestore(&id_priv->lock, flags);
210 return ret;
211}
212
213static int cma_comp_exch(struct rdma_id_private *id_priv,
214 enum cma_state comp, enum cma_state exch)
215{
216 unsigned long flags;
217 int ret;
218
219 spin_lock_irqsave(&id_priv->lock, flags);
220 if ((ret = (id_priv->state == comp)))
221 id_priv->state = exch;
222 spin_unlock_irqrestore(&id_priv->lock, flags);
223 return ret;
224}
225
226static enum cma_state cma_exch(struct rdma_id_private *id_priv,
227 enum cma_state exch)
228{
229 unsigned long flags;
230 enum cma_state old;
231
232 spin_lock_irqsave(&id_priv->lock, flags);
233 old = id_priv->state;
234 id_priv->state = exch;
235 spin_unlock_irqrestore(&id_priv->lock, flags);
236 return old;
237}
238
239static inline u8 cma_get_ip_ver(struct cma_hdr *hdr)
240{
241 return hdr->ip_version >> 4;
242}
243
244static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
245{
246 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
247}
248
249static inline u8 sdp_get_majv(u8 sdp_version)
250{
251 return sdp_version >> 4;
252}
253
254static inline u8 sdp_get_ip_ver(struct sdp_hh *hh)
255{
256 return hh->ip_version >> 4;
257}
258
259static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver)
260{
261 hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF);
262}
263
c8f6a362
SH		 264static inline int cma_is_ud_ps(enum rdma_port_space ps)
265{
266 return (ps == RDMA_PS_UDP || ps == RDMA_PS_IPOIB);
267}
268
e51060f0
SH		 269static void cma_attach_to_dev(struct rdma_id_private *id_priv,
270 struct cma_device *cma_dev)
271{
272 atomic_inc(&cma_dev->refcount);
273 id_priv->cma_dev = cma_dev;
274 id_priv->id.device = cma_dev->device;
275 list_add_tail(&id_priv->list, &cma_dev->id_list);
276}
277
278static inline void cma_deref_dev(struct cma_device *cma_dev)
279{
280 if (atomic_dec_and_test(&cma_dev->refcount))
281 complete(&cma_dev->comp);
282}
283
284static void cma_detach_from_dev(struct rdma_id_private *id_priv)
285{
286 list_del(&id_priv->list);
287 cma_deref_dev(id_priv->cma_dev);
288 id_priv->cma_dev = NULL;
289}
290
c8f6a362
SH		 291static int cma_set_qkey(struct ib_device *device, u8 port_num,
292 enum rdma_port_space ps,
293 struct rdma_dev_addr *dev_addr, u32 *qkey)
294{
295 struct ib_sa_mcmember_rec rec;
296 int ret = 0;
297
298 switch (ps) {
299 case RDMA_PS_UDP:
300 *qkey = RDMA_UDP_QKEY;
301 break;
302 case RDMA_PS_IPOIB:
303 ib_addr_get_mgid(dev_addr, &rec.mgid);
304 ret = ib_sa_get_mcmember_rec(device, port_num, &rec.mgid, &rec);
305 *qkey = be32_to_cpu(rec.qkey);
306 break;
307 default:
308 break;
309 }
310 return ret;
311}
312
07ebafba 313static int cma_acquire_dev(struct rdma_id_private *id_priv)
e51060f0 314{
c8f6a362 315 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
e51060f0 316 struct cma_device *cma_dev;
f0ee3404 317 union ib_gid gid;
e51060f0
SH		 318 int ret = -ENODEV;
319
c8f6a362 320 switch (rdma_node_get_transport(dev_addr->dev_type)) {
07ebafba 321 case RDMA_TRANSPORT_IB:
c8f6a362 322 ib_addr_get_sgid(dev_addr, &gid);
07ebafba
TT		 323 break;
324 case RDMA_TRANSPORT_IWARP:
c8f6a362 325 iw_addr_get_sgid(dev_addr, &gid);
07ebafba
TT		 326 break;
327 default:
328 return -ENODEV;
329 }
61a73c70 330
e51060f0 331 list_for_each_entry(cma_dev, &dev_list, list) {
f0ee3404 332 ret = ib_find_cached_gid(cma_dev->device, &gid,
e51060f0
SH		 333 &id_priv->id.port_num, NULL);
334 if (!ret) {
c8f6a362
SH		 335 ret = cma_set_qkey(cma_dev->device,
336 id_priv->id.port_num,
337 id_priv->id.ps, dev_addr,
338 &id_priv->qkey);
339 if (!ret)
340 cma_attach_to_dev(id_priv, cma_dev);
e51060f0
SH		 341 break;
342 }
343 }
e51060f0
SH		 344 return ret;
345}
346
e51060f0
SH		 347static void cma_deref_id(struct rdma_id_private *id_priv)
348{
349 if (atomic_dec_and_test(&id_priv->refcount))
350 complete(&id_priv->comp);
351}
352
8aa08602
SH		 353static int cma_disable_remove(struct rdma_id_private *id_priv,
354 enum cma_state state)
355{
356 unsigned long flags;
357 int ret;
358
359 spin_lock_irqsave(&id_priv->lock, flags);
360 if (id_priv->state == state) {
361 atomic_inc(&id_priv->dev_remove);
362 ret = 0;
363 } else
364 ret = -EINVAL;
365 spin_unlock_irqrestore(&id_priv->lock, flags);
366 return ret;
367}
368
369static void cma_enable_remove(struct rdma_id_private *id_priv)
e51060f0
SH		 370{
371 if (atomic_dec_and_test(&id_priv->dev_remove))
372 wake_up(&id_priv->wait_remove);
373}
374
6c719f5c
SH		 375static int cma_has_cm_dev(struct rdma_id_private *id_priv)
376{
377 return (id_priv->id.device && id_priv->cm_id.ib);
378}
379
e51060f0
SH		 380struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
381 void *context, enum rdma_port_space ps)
382{
383 struct rdma_id_private *id_priv;
384
385 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
386 if (!id_priv)
387 return ERR_PTR(-ENOMEM);
388
389 id_priv->state = CMA_IDLE;
390 id_priv->id.context = context;
391 id_priv->id.event_handler = event_handler;
392 id_priv->id.ps = ps;
393 spin_lock_init(&id_priv->lock);
c5483388 394 mutex_init(&id_priv->qp_mutex);
e51060f0
SH		 395 init_completion(&id_priv->comp);
396 atomic_set(&id_priv->refcount, 1);
397 init_waitqueue_head(&id_priv->wait_remove);
398 atomic_set(&id_priv->dev_remove, 0);
399 INIT_LIST_HEAD(&id_priv->listen_list);
c8f6a362 400 INIT_LIST_HEAD(&id_priv->mc_list);
e51060f0
SH		 401 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
402
403 return &id_priv->id;
404}
405EXPORT_SYMBOL(rdma_create_id);
406
c8f6a362 407static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
e51060f0
SH		 408{
409 struct ib_qp_attr qp_attr;
c8f6a362 410 int qp_attr_mask, ret;
e51060f0 411
c8f6a362
SH		 412 qp_attr.qp_state = IB_QPS_INIT;
413 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0
SH		 414 if (ret)
415 return ret;
416
c8f6a362
SH		 417 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
418 if (ret)
419 return ret;
420
421 qp_attr.qp_state = IB_QPS_RTR;
422 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
423 if (ret)
424 return ret;
425
426 qp_attr.qp_state = IB_QPS_RTS;
427 qp_attr.sq_psn = 0;
428 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
429
430 return ret;
e51060f0
SH		 431}
432
c8f6a362 433static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
07ebafba
TT		 434{
435 struct ib_qp_attr qp_attr;
c8f6a362 436 int qp_attr_mask, ret;
07ebafba
TT		 437
438 qp_attr.qp_state = IB_QPS_INIT;
c8f6a362
SH		 439 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
440 if (ret)
441 return ret;
07ebafba 442
c8f6a362 443 return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
07ebafba
TT		 444}
445
e51060f0
SH		 446int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
447 struct ib_qp_init_attr *qp_init_attr)
448{
449 struct rdma_id_private *id_priv;
450 struct ib_qp *qp;
451 int ret;
452
453 id_priv = container_of(id, struct rdma_id_private, id);
454 if (id->device != pd->device)
455 return -EINVAL;
456
457 qp = ib_create_qp(pd, qp_init_attr);
458 if (IS_ERR(qp))
459 return PTR_ERR(qp);
460
c8f6a362
SH		 461 if (cma_is_ud_ps(id_priv->id.ps))
462 ret = cma_init_ud_qp(id_priv, qp);
463 else
464 ret = cma_init_conn_qp(id_priv, qp);
e51060f0
SH		 465 if (ret)
466 goto err;
467
468 id->qp = qp;
469 id_priv->qp_num = qp->qp_num;
e51060f0
SH		 470 id_priv->srq = (qp->srq != NULL);
471 return 0;
472err:
473 ib_destroy_qp(qp);
474 return ret;
475}
476EXPORT_SYMBOL(rdma_create_qp);
477
478void rdma_destroy_qp(struct rdma_cm_id *id)
479{
c5483388
SH		 480 struct rdma_id_private *id_priv;
481
482 id_priv = container_of(id, struct rdma_id_private, id);
483 mutex_lock(&id_priv->qp_mutex);
484 ib_destroy_qp(id_priv->id.qp);
485 id_priv->id.qp = NULL;
486 mutex_unlock(&id_priv->qp_mutex);
e51060f0
SH		 487}
488EXPORT_SYMBOL(rdma_destroy_qp);
489
c5483388 490static int cma_modify_qp_rtr(struct rdma_id_private *id_priv)
e51060f0
SH		 491{
492 struct ib_qp_attr qp_attr;
493 int qp_attr_mask, ret;
494
c5483388
SH		 495 mutex_lock(&id_priv->qp_mutex);
496 if (!id_priv->id.qp) {
497 ret = 0;
498 goto out;
499 }
e51060f0
SH		 500
501 /* Need to update QP attributes from default values. */
502 qp_attr.qp_state = IB_QPS_INIT;
c5483388 503 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 504 if (ret)
c5483388 505 goto out;
e51060f0 506
c5483388 507 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
e51060f0 508 if (ret)
c5483388 509 goto out;
e51060f0
SH		 510
511 qp_attr.qp_state = IB_QPS_RTR;
c5483388 512 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 513 if (ret)
c5483388 514 goto out;
e51060f0 515
c5483388
SH		 516 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
517out:
518 mutex_unlock(&id_priv->qp_mutex);
519 return ret;
e51060f0
SH		 520}
521
c5483388 522static int cma_modify_qp_rts(struct rdma_id_private *id_priv)
e51060f0
SH		 523{
524 struct ib_qp_attr qp_attr;
525 int qp_attr_mask, ret;
526
c5483388
SH		 527 mutex_lock(&id_priv->qp_mutex);
528 if (!id_priv->id.qp) {
529 ret = 0;
530 goto out;
531 }
e51060f0
SH		 532
533 qp_attr.qp_state = IB_QPS_RTS;
c5483388 534 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 535 if (ret)
c5483388 536 goto out;
e51060f0 537
c5483388
SH		 538 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
539out:
540 mutex_unlock(&id_priv->qp_mutex);
541 return ret;
e51060f0
SH		 542}
543
c5483388 544static int cma_modify_qp_err(struct rdma_id_private *id_priv)
e51060f0
SH		 545{
546 struct ib_qp_attr qp_attr;
c5483388 547 int ret;
e51060f0 548
c5483388
SH		 549 mutex_lock(&id_priv->qp_mutex);
550 if (!id_priv->id.qp) {
551 ret = 0;
552 goto out;
553 }
e51060f0
SH		 554
555 qp_attr.qp_state = IB_QPS_ERR;
c5483388
SH		 556 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
557out:
558 mutex_unlock(&id_priv->qp_mutex);
559 return ret;
e51060f0
SH		 560}
561
c8f6a362
SH		 562static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
563 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
564{
565 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
566 int ret;
567
568 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
569 ib_addr_get_pkey(dev_addr),
570 &qp_attr->pkey_index);
571 if (ret)
572 return ret;
573
574 qp_attr->port_num = id_priv->id.port_num;
575 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
576
577 if (cma_is_ud_ps(id_priv->id.ps)) {
578 qp_attr->qkey = id_priv->qkey;
579 *qp_attr_mask |= IB_QP_QKEY;
580 } else {
581 qp_attr->qp_access_flags = 0;
582 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
583 }
584 return 0;
585}
586
e51060f0
SH		 587int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
588 int *qp_attr_mask)
589{
590 struct rdma_id_private *id_priv;
c8f6a362 591 int ret = 0;
e51060f0
SH		 592
593 id_priv = container_of(id, struct rdma_id_private, id);
07ebafba
TT		 594 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
595 case RDMA_TRANSPORT_IB:
c8f6a362
SH		 596 if (!id_priv->cm_id.ib || cma_is_ud_ps(id_priv->id.ps))
597 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
598 else
599 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
600 qp_attr_mask);
e51060f0
SH		 601 if (qp_attr->qp_state == IB_QPS_RTR)
602 qp_attr->rq_psn = id_priv->seq_num;
603 break;
07ebafba 604 case RDMA_TRANSPORT_IWARP:
c8f6a362 605 if (!id_priv->cm_id.iw) {
8f076531 606 qp_attr->qp_access_flags = 0;
c8f6a362
SH		 607 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
608 } else
609 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
610 qp_attr_mask);
07ebafba 611 break;
e51060f0
SH		 612 default:
613 ret = -ENOSYS;
614 break;
615 }
616
617 return ret;
618}
619EXPORT_SYMBOL(rdma_init_qp_attr);
620
621static inline int cma_zero_addr(struct sockaddr *addr)
622{
623 struct in6_addr *ip6;
624
625 if (addr->sa_family == AF_INET)
626 return ZERONET(((struct sockaddr_in *) addr)->sin_addr.s_addr);
627 else {
628 ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr;
629 return (ip6->s6_addr32[0] | ip6->s6_addr32[1] |
5fd571cb 630 ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0;
e51060f0
SH		 631 }
632}
633
634static inline int cma_loopback_addr(struct sockaddr *addr)
635{
636 return LOOPBACK(((struct sockaddr_in *) addr)->sin_addr.s_addr);
637}
638
639static inline int cma_any_addr(struct sockaddr *addr)
640{
641 return cma_zero_addr(addr) || cma_loopback_addr(addr);
642}
643
628e5f6d
SH		 644static inline __be16 cma_port(struct sockaddr *addr)
645{
646 if (addr->sa_family == AF_INET)
647 return ((struct sockaddr_in *) addr)->sin_port;
648 else
649 return ((struct sockaddr_in6 *) addr)->sin6_port;
650}
651
e51060f0
SH		 652static inline int cma_any_port(struct sockaddr *addr)
653{
628e5f6d 654 return !cma_port(addr);
e51060f0
SH		 655}
656
657static int cma_get_net_info(void *hdr, enum rdma_port_space ps,
658 u8 *ip_ver, __u16 *port,
659 union cma_ip_addr **src, union cma_ip_addr **dst)
660{
661 switch (ps) {
662 case RDMA_PS_SDP:
663 if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) !=
664 SDP_MAJ_VERSION)
665 return -EINVAL;
666
667 *ip_ver = sdp_get_ip_ver(hdr);
668 *port = ((struct sdp_hh *) hdr)->port;
669 *src = &((struct sdp_hh *) hdr)->src_addr;
670 *dst = &((struct sdp_hh *) hdr)->dst_addr;
671 break;
672 default:
673 if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION)
674 return -EINVAL;
675
676 *ip_ver = cma_get_ip_ver(hdr);
677 *port = ((struct cma_hdr *) hdr)->port;
678 *src = &((struct cma_hdr *) hdr)->src_addr;
679 *dst = &((struct cma_hdr *) hdr)->dst_addr;
680 break;
681 }
682
683 if (*ip_ver != 4 && *ip_ver != 6)
684 return -EINVAL;
685 return 0;
686}
687
688static void cma_save_net_info(struct rdma_addr *addr,
689 struct rdma_addr *listen_addr,
690 u8 ip_ver, __u16 port,
691 union cma_ip_addr *src, union cma_ip_addr *dst)
692{
693 struct sockaddr_in *listen4, *ip4;
694 struct sockaddr_in6 *listen6, *ip6;
695
696 switch (ip_ver) {
697 case 4:
698 listen4 = (struct sockaddr_in *) &listen_addr->src_addr;
699 ip4 = (struct sockaddr_in *) &addr->src_addr;
700 ip4->sin_family = listen4->sin_family;
701 ip4->sin_addr.s_addr = dst->ip4.addr;
702 ip4->sin_port = listen4->sin_port;
703
704 ip4 = (struct sockaddr_in *) &addr->dst_addr;
705 ip4->sin_family = listen4->sin_family;
706 ip4->sin_addr.s_addr = src->ip4.addr;
707 ip4->sin_port = port;
708 break;
709 case 6:
710 listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr;
711 ip6 = (struct sockaddr_in6 *) &addr->src_addr;
712 ip6->sin6_family = listen6->sin6_family;
713 ip6->sin6_addr = dst->ip6;
714 ip6->sin6_port = listen6->sin6_port;
715
716 ip6 = (struct sockaddr_in6 *) &addr->dst_addr;
717 ip6->sin6_family = listen6->sin6_family;
718 ip6->sin6_addr = src->ip6;
719 ip6->sin6_port = port;
720 break;
721 default:
722 break;
723 }
724}
725
726static inline int cma_user_data_offset(enum rdma_port_space ps)
727{
728 switch (ps) {
729 case RDMA_PS_SDP:
730 return 0;
731 default:
732 return sizeof(struct cma_hdr);
733 }
734}
735
e51060f0
SH		 736static void cma_cancel_route(struct rdma_id_private *id_priv)
737{
07ebafba
TT		 738 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
739 case RDMA_TRANSPORT_IB:
e51060f0
SH		 740 if (id_priv->query)
741 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
742 break;
743 default:
744 break;
745 }
746}
747
748static inline int cma_internal_listen(struct rdma_id_private *id_priv)
749{
750 return (id_priv->state == CMA_LISTEN) && id_priv->cma_dev &&
751 cma_any_addr(&id_priv->id.route.addr.src_addr);
752}
753
754static void cma_destroy_listen(struct rdma_id_private *id_priv)
755{
756 cma_exch(id_priv, CMA_DESTROYING);
757
758 if (id_priv->cma_dev) {
07ebafba
TT		 759 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
760 case RDMA_TRANSPORT_IB:
3cd96564 761 if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib))
e51060f0
SH		 762 ib_destroy_cm_id(id_priv->cm_id.ib);
763 break;
07ebafba
TT		 764 case RDMA_TRANSPORT_IWARP:
765 if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw))
766 iw_destroy_cm_id(id_priv->cm_id.iw);
767 break;
e51060f0
SH		 768 default:
769 break;
770 }
771 cma_detach_from_dev(id_priv);
772 }
773 list_del(&id_priv->listen_list);
774
775 cma_deref_id(id_priv);
776 wait_for_completion(&id_priv->comp);
777
778 kfree(id_priv);
779}
780
781static void cma_cancel_listens(struct rdma_id_private *id_priv)
782{
783 struct rdma_id_private *dev_id_priv;
784
785 mutex_lock(&lock);
786 list_del(&id_priv->list);
787
788 while (!list_empty(&id_priv->listen_list)) {
789 dev_id_priv = list_entry(id_priv->listen_list.next,
790 struct rdma_id_private, listen_list);
791 cma_destroy_listen(dev_id_priv);
792 }
793 mutex_unlock(&lock);
794}
795
796static void cma_cancel_operation(struct rdma_id_private *id_priv,
797 enum cma_state state)
798{
799 switch (state) {
800 case CMA_ADDR_QUERY:
801 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
802 break;
803 case CMA_ROUTE_QUERY:
804 cma_cancel_route(id_priv);
805 break;
806 case CMA_LISTEN:
807 if (cma_any_addr(&id_priv->id.route.addr.src_addr) &&
808 !id_priv->cma_dev)
809 cma_cancel_listens(id_priv);
810 break;
811 default:
812 break;
813 }
814}
815
816static void cma_release_port(struct rdma_id_private *id_priv)
817{
818 struct rdma_bind_list *bind_list = id_priv->bind_list;
819
820 if (!bind_list)
821 return;
822
823 mutex_lock(&lock);
824 hlist_del(&id_priv->node);
825 if (hlist_empty(&bind_list->owners)) {
826 idr_remove(bind_list->ps, bind_list->port);
827 kfree(bind_list);
828 }
829 mutex_unlock(&lock);
830}
831
c8f6a362
SH		 832static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
833{
834 struct cma_multicast *mc;
835
836 while (!list_empty(&id_priv->mc_list)) {
837 mc = container_of(id_priv->mc_list.next,
838 struct cma_multicast, list);
839 list_del(&mc->list);
840 ib_sa_free_multicast(mc->multicast.ib);
841 kfree(mc);
842 }
843}
844
e51060f0
SH		 845void rdma_destroy_id(struct rdma_cm_id *id)
846{
847 struct rdma_id_private *id_priv;
848 enum cma_state state;
849
850 id_priv = container_of(id, struct rdma_id_private, id);
851 state = cma_exch(id_priv, CMA_DESTROYING);
852 cma_cancel_operation(id_priv, state);
853
61a73c70 854 mutex_lock(&lock);
e51060f0 855 if (id_priv->cma_dev) {
61a73c70 856 mutex_unlock(&lock);
07ebafba
TT		 857 switch (rdma_node_get_transport(id->device->node_type)) {
858 case RDMA_TRANSPORT_IB:
3cd96564 859 if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib))
e51060f0
SH		 860 ib_destroy_cm_id(id_priv->cm_id.ib);
861 break;
07ebafba
TT		 862 case RDMA_TRANSPORT_IWARP:
863 if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw))
864 iw_destroy_cm_id(id_priv->cm_id.iw);
865 break;
e51060f0
SH		 866 default:
867 break;
868 }
c8f6a362 869 cma_leave_mc_groups(id_priv);
3cd96564 870 mutex_lock(&lock);
e51060f0 871 cma_detach_from_dev(id_priv);
e51060f0 872 }
61a73c70 873 mutex_unlock(&lock);
e51060f0
SH		 874
875 cma_release_port(id_priv);
876 cma_deref_id(id_priv);
877 wait_for_completion(&id_priv->comp);
878
879 kfree(id_priv->id.route.path_rec);
880 kfree(id_priv);
881}
882EXPORT_SYMBOL(rdma_destroy_id);
883
884static int cma_rep_recv(struct rdma_id_private *id_priv)
885{
886 int ret;
887
c5483388 888 ret = cma_modify_qp_rtr(id_priv);
e51060f0
SH		 889 if (ret)
890 goto reject;
891
c5483388 892 ret = cma_modify_qp_rts(id_priv);
e51060f0
SH		 893 if (ret)
894 goto reject;
895
896 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
897 if (ret)
898 goto reject;
899
900 return 0;
901reject:
c5483388 902 cma_modify_qp_err(id_priv);
e51060f0
SH		 903 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
904 NULL, 0, NULL, 0);
905 return ret;
906}
907
908static int cma_verify_rep(struct rdma_id_private *id_priv, void *data)
909{
910 if (id_priv->id.ps == RDMA_PS_SDP &&
911 sdp_get_majv(((struct sdp_hah *) data)->sdp_version) !=
912 SDP_MAJ_VERSION)
913 return -EINVAL;
914
915 return 0;
916}
917
a1b1b61f
SH		 918static void cma_set_rep_event_data(struct rdma_cm_event *event,
919 struct ib_cm_rep_event_param *rep_data,
920 void *private_data)
921{
922 event->param.conn.private_data = private_data;
923 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
924 event->param.conn.responder_resources = rep_data->responder_resources;
925 event->param.conn.initiator_depth = rep_data->initiator_depth;
926 event->param.conn.flow_control = rep_data->flow_control;
927 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
928 event->param.conn.srq = rep_data->srq;
929 event->param.conn.qp_num = rep_data->remote_qpn;
930}
931
e51060f0
SH		 932static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
933{
934 struct rdma_id_private *id_priv = cm_id->context;
a1b1b61f
SH		 935 struct rdma_cm_event event;
936 int ret = 0;
e51060f0 937
8aa08602
SH		 938 if (cma_disable_remove(id_priv, CMA_CONNECT))
939 return 0;
e51060f0 940
a1b1b61f 941 memset(&event, 0, sizeof event);
e51060f0
SH		 942 switch (ib_event->event) {
943 case IB_CM_REQ_ERROR:
944 case IB_CM_REP_ERROR:
a1b1b61f
SH		 945 event.event = RDMA_CM_EVENT_UNREACHABLE;
946 event.status = -ETIMEDOUT;
e51060f0
SH		 947 break;
948 case IB_CM_REP_RECEIVED:
a1b1b61f
SH		 949 event.status = cma_verify_rep(id_priv, ib_event->private_data);
950 if (event.status)
951 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
e51060f0 952 else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) {
a1b1b61f
SH		 953 event.status = cma_rep_recv(id_priv);
954 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
955 RDMA_CM_EVENT_ESTABLISHED;
e51060f0 956 } else
a1b1b61f
SH		 957 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
958 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
959 ib_event->private_data);
e51060f0
SH		 960 break;
961 case IB_CM_RTU_RECEIVED:
0fe313b0
SH		 962 case IB_CM_USER_ESTABLISHED:
963 event.event = RDMA_CM_EVENT_ESTABLISHED;
e51060f0
SH		 964 break;
965 case IB_CM_DREQ_ERROR:
a1b1b61f 966 event.status = -ETIMEDOUT; /* fall through */
e51060f0
SH		 967 case IB_CM_DREQ_RECEIVED:
968 case IB_CM_DREP_RECEIVED:
969 if (!cma_comp_exch(id_priv, CMA_CONNECT, CMA_DISCONNECT))
970 goto out;
a1b1b61f 971 event.event = RDMA_CM_EVENT_DISCONNECTED;
e51060f0
SH		 972 break;
973 case IB_CM_TIMEWAIT_EXIT:
974 case IB_CM_MRA_RECEIVED:
975 /* ignore event */
976 goto out;
977 case IB_CM_REJ_RECEIVED:
c5483388 978 cma_modify_qp_err(id_priv);
a1b1b61f
SH		 979 event.status = ib_event->param.rej_rcvd.reason;
980 event.event = RDMA_CM_EVENT_REJECTED;
981 event.param.conn.private_data = ib_event->private_data;
982 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
e51060f0
SH		 983 break;
984 default:
985 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d",
986 ib_event->event);
987 goto out;
988 }
989
a1b1b61f 990 ret = id_priv->id.event_handler(&id_priv->id, &event);
e51060f0
SH		 991 if (ret) {
992 /* Destroy the CM ID by returning a non-zero value. */
993 id_priv->cm_id.ib = NULL;
994 cma_exch(id_priv, CMA_DESTROYING);
8aa08602 995 cma_enable_remove(id_priv);
e51060f0
SH		 996 rdma_destroy_id(&id_priv->id);
997 return ret;
998 }
999out:
8aa08602 1000 cma_enable_remove(id_priv);
e51060f0
SH		 1001 return ret;
1002}
1003
628e5f6d
SH		 1004static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
1005 struct ib_cm_event *ib_event)
e51060f0
SH		 1006{
1007 struct rdma_id_private *id_priv;
1008 struct rdma_cm_id *id;
1009 struct rdma_route *rt;
1010 union cma_ip_addr *src, *dst;
1011 __u16 port;
1012 u8 ip_ver;
1013
3f168d2b
KK		 1014 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1015 &ip_ver, &port, &src, &dst))
1016 goto err;
1017
e51060f0
SH		 1018 id = rdma_create_id(listen_id->event_handler, listen_id->context,
1019 listen_id->ps);
1020 if (IS_ERR(id))
3f168d2b
KK		 1021 goto err;
1022
1023 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1024 ip_ver, port, src, dst);
e51060f0
SH		 1025
1026 rt = &id->route;
1027 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
3f168d2b
KK		 1028 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
1029 GFP_KERNEL);
e51060f0 1030 if (!rt->path_rec)
3f168d2b 1031 goto destroy_id;
e51060f0 1032
e51060f0
SH		 1033 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
1034 if (rt->num_paths == 2)
1035 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1036
1037 ib_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
1038 ib_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
1039 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
07ebafba 1040 rt->addr.dev_addr.dev_type = RDMA_NODE_IB_CA;
e51060f0
SH		 1041
1042 id_priv = container_of(id, struct rdma_id_private, id);
1043 id_priv->state = CMA_CONNECT;
1044 return id_priv;
3f168d2b
KK		 1045
1046destroy_id:
e51060f0 1047 rdma_destroy_id(id);
3f168d2b 1048err:
e51060f0
SH		 1049 return NULL;
1050}
1051
628e5f6d
SH		 1052static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1053 struct ib_cm_event *ib_event)
1054{
1055 struct rdma_id_private *id_priv;
1056 struct rdma_cm_id *id;
1057 union cma_ip_addr *src, *dst;
1058 __u16 port;
1059 u8 ip_ver;
1060 int ret;
1061
1062 id = rdma_create_id(listen_id->event_handler, listen_id->context,
1063 listen_id->ps);
1064 if (IS_ERR(id))
1065 return NULL;
1066
1067
1068 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1069 &ip_ver, &port, &src, &dst))
1070 goto err;
1071
1072 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1073 ip_ver, port, src, dst);
1074
1075 ret = rdma_translate_ip(&id->route.addr.src_addr,
1076 &id->route.addr.dev_addr);
1077 if (ret)
1078 goto err;
1079
1080 id_priv = container_of(id, struct rdma_id_private, id);
1081 id_priv->state = CMA_CONNECT;
1082 return id_priv;
1083err:
1084 rdma_destroy_id(id);
1085 return NULL;
1086}
1087
a1b1b61f
SH		 1088static void cma_set_req_event_data(struct rdma_cm_event *event,
1089 struct ib_cm_req_event_param *req_data,
1090 void *private_data, int offset)
1091{
1092 event->param.conn.private_data = private_data + offset;
1093 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1094 event->param.conn.responder_resources = req_data->responder_resources;
1095 event->param.conn.initiator_depth = req_data->initiator_depth;
1096 event->param.conn.flow_control = req_data->flow_control;
1097 event->param.conn.retry_count = req_data->retry_count;
1098 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1099 event->param.conn.srq = req_data->srq;
1100 event->param.conn.qp_num = req_data->remote_qpn;
1101}
1102
e51060f0
SH		 1103static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1104{
1105 struct rdma_id_private *listen_id, *conn_id;
a1b1b61f 1106 struct rdma_cm_event event;
e51060f0
SH		 1107 int offset, ret;
1108
1109 listen_id = cm_id->context;
8aa08602
SH		 1110 if (cma_disable_remove(listen_id, CMA_LISTEN))
1111 return -ECONNABORTED;
e51060f0 1112
628e5f6d
SH		 1113 memset(&event, 0, sizeof event);
1114 offset = cma_user_data_offset(listen_id->id.ps);
1115 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
c8f6a362 1116 if (cma_is_ud_ps(listen_id->id.ps)) {
628e5f6d
SH		 1117 conn_id = cma_new_udp_id(&listen_id->id, ib_event);
1118 event.param.ud.private_data = ib_event->private_data + offset;
1119 event.param.ud.private_data_len =
1120 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1121 } else {
dcb3f974 1122 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
628e5f6d
SH		 1123 conn_id = cma_new_conn_id(&listen_id->id, ib_event);
1124 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1125 ib_event->private_data, offset);
1126 }
e51060f0
SH		 1127 if (!conn_id) {
1128 ret = -ENOMEM;
1129 goto out;
1130 }
1131
1132 atomic_inc(&conn_id->dev_remove);
61a73c70 1133 mutex_lock(&lock);
07ebafba 1134 ret = cma_acquire_dev(conn_id);
61a73c70 1135 mutex_unlock(&lock);
a1a733f6
KK		 1136 if (ret)
1137 goto release_conn_id;
e51060f0
SH		 1138
1139 conn_id->cm_id.ib = cm_id;
1140 cm_id->context = conn_id;
1141 cm_id->cm_handler = cma_ib_handler;
1142
a1b1b61f 1143 ret = conn_id->id.event_handler(&conn_id->id, &event);
a1a733f6
KK		 1144 if (!ret)
1145 goto out;
1146
1147 /* Destroy the CM ID by returning a non-zero value. */
1148 conn_id->cm_id.ib = NULL;
1149
1150release_conn_id:
1151 cma_exch(conn_id, CMA_DESTROYING);
8aa08602 1152 cma_enable_remove(conn_id);
a1a733f6
KK		 1153 rdma_destroy_id(&conn_id->id);
1154
e51060f0 1155out:
8aa08602 1156 cma_enable_remove(listen_id);
e51060f0
SH		 1157 return ret;
1158}
1159
1160static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr)
1161{
628e5f6d 1162 return cpu_to_be64(((u64)ps << 16) + be16_to_cpu(cma_port(addr)));
e51060f0
SH		 1163}
1164
1165static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr,
1166 struct ib_cm_compare_data *compare)
1167{
1168 struct cma_hdr *cma_data, *cma_mask;
1169 struct sdp_hh *sdp_data, *sdp_mask;
1170 __u32 ip4_addr;
1171 struct in6_addr ip6_addr;
1172
1173 memset(compare, 0, sizeof *compare);
1174 cma_data = (void *) compare->data;
1175 cma_mask = (void *) compare->mask;
1176 sdp_data = (void *) compare->data;
1177 sdp_mask = (void *) compare->mask;
1178
1179 switch (addr->sa_family) {
1180 case AF_INET:
1181 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1182 if (ps == RDMA_PS_SDP) {
1183 sdp_set_ip_ver(sdp_data, 4);
1184 sdp_set_ip_ver(sdp_mask, 0xF);
1185 sdp_data->dst_addr.ip4.addr = ip4_addr;
1186 sdp_mask->dst_addr.ip4.addr = ~0;
1187 } else {
1188 cma_set_ip_ver(cma_data, 4);
1189 cma_set_ip_ver(cma_mask, 0xF);
1190 cma_data->dst_addr.ip4.addr = ip4_addr;
1191 cma_mask->dst_addr.ip4.addr = ~0;
1192 }
1193 break;
1194 case AF_INET6:
1195 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr;
1196 if (ps == RDMA_PS_SDP) {
1197 sdp_set_ip_ver(sdp_data, 6);
1198 sdp_set_ip_ver(sdp_mask, 0xF);
1199 sdp_data->dst_addr.ip6 = ip6_addr;
1200 memset(&sdp_mask->dst_addr.ip6, 0xFF,
1201 sizeof sdp_mask->dst_addr.ip6);
1202 } else {
1203 cma_set_ip_ver(cma_data, 6);
1204 cma_set_ip_ver(cma_mask, 0xF);
1205 cma_data->dst_addr.ip6 = ip6_addr;
1206 memset(&cma_mask->dst_addr.ip6, 0xFF,
1207 sizeof cma_mask->dst_addr.ip6);
1208 }
1209 break;
1210 default:
1211 break;
1212 }
1213}
1214
07ebafba
TT		 1215static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1216{
1217 struct rdma_id_private *id_priv = iw_id->context;
a1b1b61f 1218 struct rdma_cm_event event;
07ebafba
TT		 1219 struct sockaddr_in *sin;
1220 int ret = 0;
1221
be65f086
SH		 1222 if (cma_disable_remove(id_priv, CMA_CONNECT))
1223 return 0;
07ebafba 1224
be65f086 1225 memset(&event, 0, sizeof event);
07ebafba
TT		 1226 switch (iw_event->event) {
1227 case IW_CM_EVENT_CLOSE:
a1b1b61f 1228 event.event = RDMA_CM_EVENT_DISCONNECTED;
07ebafba
TT		 1229 break;
1230 case IW_CM_EVENT_CONNECT_REPLY:
1231 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1232 *sin = iw_event->local_addr;
1233 sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr;
1234 *sin = iw_event->remote_addr;
881a045f
SW		 1235 switch (iw_event->status) {
1236 case 0:
a1b1b61f 1237 event.event = RDMA_CM_EVENT_ESTABLISHED;
881a045f
SW		 1238 break;
1239 case -ECONNRESET:
1240 case -ECONNREFUSED:
1241 event.event = RDMA_CM_EVENT_REJECTED;
1242 break;
1243 case -ETIMEDOUT:
1244 event.event = RDMA_CM_EVENT_UNREACHABLE;
1245 break;
1246 default:
1247 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1248 break;
1249 }
07ebafba
TT		 1250 break;
1251 case IW_CM_EVENT_ESTABLISHED:
a1b1b61f 1252 event.event = RDMA_CM_EVENT_ESTABLISHED;
07ebafba
TT		 1253 break;
1254 default:
1255 BUG_ON(1);
1256 }
1257
a1b1b61f
SH		 1258 event.status = iw_event->status;
1259 event.param.conn.private_data = iw_event->private_data;
1260 event.param.conn.private_data_len = iw_event->private_data_len;
1261 ret = id_priv->id.event_handler(&id_priv->id, &event);
07ebafba
TT		 1262 if (ret) {
1263 /* Destroy the CM ID by returning a non-zero value. */
1264 id_priv->cm_id.iw = NULL;
1265 cma_exch(id_priv, CMA_DESTROYING);
8aa08602 1266 cma_enable_remove(id_priv);
07ebafba
TT		 1267 rdma_destroy_id(&id_priv->id);
1268 return ret;
1269 }
1270
8aa08602 1271 cma_enable_remove(id_priv);
07ebafba
TT		 1272 return ret;
1273}
1274
1275static int iw_conn_req_handler(struct iw_cm_id *cm_id,
1276 struct iw_cm_event *iw_event)
1277{
1278 struct rdma_cm_id *new_cm_id;
1279 struct rdma_id_private *listen_id, *conn_id;
1280 struct sockaddr_in *sin;
1281 struct net_device *dev = NULL;
a1b1b61f 1282 struct rdma_cm_event event;
07ebafba
TT		 1283 int ret;
1284
1285 listen_id = cm_id->context;
8aa08602
SH		 1286 if (cma_disable_remove(listen_id, CMA_LISTEN))
1287 return -ECONNABORTED;
07ebafba
TT		 1288
1289 /* Create a new RDMA id for the new IW CM ID */
1290 new_cm_id = rdma_create_id(listen_id->id.event_handler,
1291 listen_id->id.context,
1292 RDMA_PS_TCP);
1293 if (!new_cm_id) {
1294 ret = -ENOMEM;
1295 goto out;
1296 }
1297 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
1298 atomic_inc(&conn_id->dev_remove);
1299 conn_id->state = CMA_CONNECT;
1300
1301 dev = ip_dev_find(iw_event->local_addr.sin_addr.s_addr);
1302 if (!dev) {
1303 ret = -EADDRNOTAVAIL;
8aa08602 1304 cma_enable_remove(conn_id);
07ebafba
TT		 1305 rdma_destroy_id(new_cm_id);
1306 goto out;
1307 }
1308 ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL);
1309 if (ret) {
8aa08602 1310 cma_enable_remove(conn_id);
07ebafba
TT		 1311 rdma_destroy_id(new_cm_id);
1312 goto out;
1313 }
1314
61a73c70 1315 mutex_lock(&lock);
07ebafba 1316 ret = cma_acquire_dev(conn_id);
61a73c70 1317 mutex_unlock(&lock);
07ebafba 1318 if (ret) {
8aa08602 1319 cma_enable_remove(conn_id);
07ebafba
TT		 1320 rdma_destroy_id(new_cm_id);
1321 goto out;
1322 }
1323
1324 conn_id->cm_id.iw = cm_id;
1325 cm_id->context = conn_id;
1326 cm_id->cm_handler = cma_iw_handler;
1327
1328 sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr;
1329 *sin = iw_event->local_addr;
1330 sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr;
1331 *sin = iw_event->remote_addr;
1332
a1b1b61f
SH		 1333 memset(&event, 0, sizeof event);
1334 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1335 event.param.conn.private_data = iw_event->private_data;
1336 event.param.conn.private_data_len = iw_event->private_data_len;
1337 ret = conn_id->id.event_handler(&conn_id->id, &event);
07ebafba
TT		 1338 if (ret) {
1339 /* User wants to destroy the CM ID */
1340 conn_id->cm_id.iw = NULL;
1341 cma_exch(conn_id, CMA_DESTROYING);
8aa08602 1342 cma_enable_remove(conn_id);
07ebafba
TT		 1343 rdma_destroy_id(&conn_id->id);
1344 }
1345
1346out:
1347 if (dev)
1348 dev_put(dev);
8aa08602 1349 cma_enable_remove(listen_id);
07ebafba
TT		 1350 return ret;
1351}
1352
e51060f0
SH		 1353static int cma_ib_listen(struct rdma_id_private *id_priv)
1354{
1355 struct ib_cm_compare_data compare_data;
1356 struct sockaddr *addr;
1357 __be64 svc_id;
1358 int ret;
1359
1360 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_req_handler,
1361 id_priv);
1362 if (IS_ERR(id_priv->cm_id.ib))
1363 return PTR_ERR(id_priv->cm_id.ib);
1364
1365 addr = &id_priv->id.route.addr.src_addr;
1366 svc_id = cma_get_service_id(id_priv->id.ps, addr);
1367 if (cma_any_addr(addr))
1368 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL);
1369 else {
1370 cma_set_compare_data(id_priv->id.ps, addr, &compare_data);
1371 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data);
1372 }
1373
1374 if (ret) {
1375 ib_destroy_cm_id(id_priv->cm_id.ib);
1376 id_priv->cm_id.ib = NULL;
1377 }
1378
1379 return ret;
1380}
1381
07ebafba
TT		 1382static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
1383{
1384 int ret;
1385 struct sockaddr_in *sin;
1386
1387 id_priv->cm_id.iw = iw_create_cm_id(id_priv->id.device,
1388 iw_conn_req_handler,
1389 id_priv);
1390 if (IS_ERR(id_priv->cm_id.iw))
1391 return PTR_ERR(id_priv->cm_id.iw);
1392
1393 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1394 id_priv->cm_id.iw->local_addr = *sin;
1395
1396 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
1397
1398 if (ret) {
1399 iw_destroy_cm_id(id_priv->cm_id.iw);
1400 id_priv->cm_id.iw = NULL;
1401 }
1402
1403 return ret;
1404}
1405
e51060f0
SH		 1406static int cma_listen_handler(struct rdma_cm_id *id,
1407 struct rdma_cm_event *event)
1408{
1409 struct rdma_id_private *id_priv = id->context;
1410
1411 id->context = id_priv->id.context;
1412 id->event_handler = id_priv->id.event_handler;
1413 return id_priv->id.event_handler(id, event);
1414}
1415
1416static void cma_listen_on_dev(struct rdma_id_private *id_priv,
1417 struct cma_device *cma_dev)
1418{
1419 struct rdma_id_private *dev_id_priv;
1420 struct rdma_cm_id *id;
1421 int ret;
1422
1423 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps);
1424 if (IS_ERR(id))
1425 return;
1426
1427 dev_id_priv = container_of(id, struct rdma_id_private, id);
1428
1429 dev_id_priv->state = CMA_ADDR_BOUND;
1430 memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr,
1431 ip_addr_size(&id_priv->id.route.addr.src_addr));
1432
1433 cma_attach_to_dev(dev_id_priv, cma_dev);
1434 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
1435
1436 ret = rdma_listen(id, id_priv->backlog);
1437 if (ret)
1438 goto err;
1439
1440 return;
1441err:
1442 cma_destroy_listen(dev_id_priv);
1443}
1444
1445static void cma_listen_on_all(struct rdma_id_private *id_priv)
1446{
1447 struct cma_device *cma_dev;
1448
1449 mutex_lock(&lock);
1450 list_add_tail(&id_priv->list, &listen_any_list);
1451 list_for_each_entry(cma_dev, &dev_list, list)
1452 cma_listen_on_dev(id_priv, cma_dev);
1453 mutex_unlock(&lock);
1454}
1455
1456static int cma_bind_any(struct rdma_cm_id *id, sa_family_t af)
1457{
1458 struct sockaddr_in addr_in;
1459
1460 memset(&addr_in, 0, sizeof addr_in);
1461 addr_in.sin_family = af;
1462 return rdma_bind_addr(id, (struct sockaddr *) &addr_in);
1463}
1464
1465int rdma_listen(struct rdma_cm_id *id, int backlog)
1466{
1467 struct rdma_id_private *id_priv;
1468 int ret;
1469
1470 id_priv = container_of(id, struct rdma_id_private, id);
1471 if (id_priv->state == CMA_IDLE) {
1472 ret = cma_bind_any(id, AF_INET);
1473 if (ret)
1474 return ret;
1475 }
1476
1477 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_LISTEN))
1478 return -EINVAL;
1479
1480 id_priv->backlog = backlog;
1481 if (id->device) {
07ebafba
TT		 1482 switch (rdma_node_get_transport(id->device->node_type)) {
1483 case RDMA_TRANSPORT_IB:
e51060f0
SH		 1484 ret = cma_ib_listen(id_priv);
1485 if (ret)
1486 goto err;
1487 break;
07ebafba
TT		 1488 case RDMA_TRANSPORT_IWARP:
1489 ret = cma_iw_listen(id_priv, backlog);
1490 if (ret)
1491 goto err;
1492 break;
e51060f0
SH		 1493 default:
1494 ret = -ENOSYS;
1495 goto err;
1496 }
1497 } else
1498 cma_listen_on_all(id_priv);
1499
1500 return 0;
1501err:
1502 id_priv->backlog = 0;
1503 cma_comp_exch(id_priv, CMA_LISTEN, CMA_ADDR_BOUND);
1504 return ret;
1505}
1506EXPORT_SYMBOL(rdma_listen);
1507
a81c994d
SH		 1508void rdma_set_service_type(struct rdma_cm_id *id, int tos)
1509{
1510 struct rdma_id_private *id_priv;
1511
1512 id_priv = container_of(id, struct rdma_id_private, id);
1513 id_priv->tos = (u8) tos;
1514}
1515EXPORT_SYMBOL(rdma_set_service_type);
1516
e51060f0
SH		 1517static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
1518 void *context)
1519{
1520 struct cma_work *work = context;
1521 struct rdma_route *route;
1522
1523 route = &work->id->id.route;
1524
1525 if (!status) {
1526 route->num_paths = 1;
1527 *route->path_rec = *path_rec;
1528 } else {
1529 work->old_state = CMA_ROUTE_QUERY;
1530 work->new_state = CMA_ADDR_RESOLVED;
1531 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
8f0472d3 1532 work->event.status = status;
e51060f0
SH		 1533 }
1534
1535 queue_work(cma_wq, &work->work);
1536}
1537
1538static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
1539 struct cma_work *work)
1540{
a81c994d 1541 struct rdma_addr *addr = &id_priv->id.route.addr;
e51060f0 1542 struct ib_sa_path_rec path_rec;
a81c994d
SH		 1543 ib_sa_comp_mask comp_mask;
1544 struct sockaddr_in6 *sin6;
e51060f0
SH		 1545
1546 memset(&path_rec, 0, sizeof path_rec);
a81c994d
SH		 1547 ib_addr_get_sgid(&addr->dev_addr, &path_rec.sgid);
1548 ib_addr_get_dgid(&addr->dev_addr, &path_rec.dgid);
1549 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(&addr->dev_addr));
e51060f0 1550 path_rec.numb_path = 1;
962063e6 1551 path_rec.reversible = 1;
a81c994d
SH		 1552 path_rec.service_id = cma_get_service_id(id_priv->id.ps, &addr->dst_addr);
1553
1554 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
1555 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
1556 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
1557
1558 if (addr->src_addr.sa_family == AF_INET) {
1559 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
1560 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
1561 } else {
1562 sin6 = (struct sockaddr_in6 *) &addr->src_addr;
1563 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
1564 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
1565 }
e51060f0 1566
c1a0b23b 1567 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
a81c994d
SH		 1568 id_priv->id.port_num, &path_rec,
1569 comp_mask, timeout_ms,
1570 GFP_KERNEL, cma_query_handler,
1571 work, &id_priv->query);
e51060f0
SH		 1572
1573 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
1574}
1575
c4028958 1576static void cma_work_handler(struct work_struct *_work)
e51060f0 1577{
c4028958 1578 struct cma_work *work = container_of(_work, struct cma_work, work);
e51060f0
SH		 1579 struct rdma_id_private *id_priv = work->id;
1580 int destroy = 0;
1581
1582 atomic_inc(&id_priv->dev_remove);
1583 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
1584 goto out;
1585
1586 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1587 cma_exch(id_priv, CMA_DESTROYING);
1588 destroy = 1;
1589 }
1590out:
8aa08602 1591 cma_enable_remove(id_priv);
e51060f0
SH		 1592 cma_deref_id(id_priv);
1593 if (destroy)
1594 rdma_destroy_id(&id_priv->id);
1595 kfree(work);
1596}
1597
1598static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
1599{
1600 struct rdma_route *route = &id_priv->id.route;
1601 struct cma_work *work;
1602 int ret;
1603
1604 work = kzalloc(sizeof *work, GFP_KERNEL);
1605 if (!work)
1606 return -ENOMEM;
1607
1608 work->id = id_priv;
c4028958 1609 INIT_WORK(&work->work, cma_work_handler);
e51060f0
SH		 1610 work->old_state = CMA_ROUTE_QUERY;
1611 work->new_state = CMA_ROUTE_RESOLVED;
1612 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1613
1614 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
1615 if (!route->path_rec) {
1616 ret = -ENOMEM;
1617 goto err1;
1618 }
1619
1620 ret = cma_query_ib_route(id_priv, timeout_ms, work);
1621 if (ret)
1622 goto err2;
1623
1624 return 0;
1625err2:
1626 kfree(route->path_rec);
1627 route->path_rec = NULL;
1628err1:
1629 kfree(work);
1630 return ret;
1631}
1632
1633int rdma_set_ib_paths(struct rdma_cm_id *id,
1634 struct ib_sa_path_rec *path_rec, int num_paths)
1635{
1636 struct rdma_id_private *id_priv;
1637 int ret;
1638
1639 id_priv = container_of(id, struct rdma_id_private, id);
1640 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_RESOLVED))
1641 return -EINVAL;
1642
1643 id->route.path_rec = kmalloc(sizeof *path_rec * num_paths, GFP_KERNEL);
1644 if (!id->route.path_rec) {
1645 ret = -ENOMEM;
1646 goto err;
1647 }
1648
1649 memcpy(id->route.path_rec, path_rec, sizeof *path_rec * num_paths);
1650 return 0;
1651err:
1652 cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_ADDR_RESOLVED);
1653 return ret;
1654}
1655EXPORT_SYMBOL(rdma_set_ib_paths);
1656
07ebafba
TT		 1657static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
1658{
1659 struct cma_work *work;
1660
1661 work = kzalloc(sizeof *work, GFP_KERNEL);
1662 if (!work)
1663 return -ENOMEM;
1664
1665 work->id = id_priv;
c4028958 1666 INIT_WORK(&work->work, cma_work_handler);
07ebafba
TT		 1667 work->old_state = CMA_ROUTE_QUERY;
1668 work->new_state = CMA_ROUTE_RESOLVED;
1669 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1670 queue_work(cma_wq, &work->work);
1671 return 0;
1672}
1673
e51060f0
SH		 1674int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
1675{
1676 struct rdma_id_private *id_priv;
1677 int ret;
1678
1679 id_priv = container_of(id, struct rdma_id_private, id);
1680 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_QUERY))
1681 return -EINVAL;
1682
1683 atomic_inc(&id_priv->refcount);
07ebafba
TT		 1684 switch (rdma_node_get_transport(id->device->node_type)) {
1685 case RDMA_TRANSPORT_IB:
e51060f0
SH		 1686 ret = cma_resolve_ib_route(id_priv, timeout_ms);
1687 break;
07ebafba
TT		 1688 case RDMA_TRANSPORT_IWARP:
1689 ret = cma_resolve_iw_route(id_priv, timeout_ms);
1690 break;
e51060f0
SH		 1691 default:
1692 ret = -ENOSYS;
1693 break;
1694 }
1695 if (ret)
1696 goto err;
1697
1698 return 0;
1699err:
1700 cma_comp_exch(id_priv, CMA_ROUTE_QUERY, CMA_ADDR_RESOLVED);
1701 cma_deref_id(id_priv);
1702 return ret;
1703}
1704EXPORT_SYMBOL(rdma_resolve_route);
1705
1706static int cma_bind_loopback(struct rdma_id_private *id_priv)
1707{
1708 struct cma_device *cma_dev;
1709 struct ib_port_attr port_attr;
f0ee3404 1710 union ib_gid gid;
e51060f0
SH		 1711 u16 pkey;
1712 int ret;
1713 u8 p;
1714
1715 mutex_lock(&lock);
e82153b5
KK		 1716 if (list_empty(&dev_list)) {
1717 ret = -ENODEV;
1718 goto out;
1719 }
e51060f0
SH		 1720 list_for_each_entry(cma_dev, &dev_list, list)
1721 for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p)
e82153b5 1722 if (!ib_query_port(cma_dev->device, p, &port_attr) &&
e51060f0
SH		 1723 port_attr.state == IB_PORT_ACTIVE)
1724 goto port_found;
1725
e82153b5
KK		 1726 p = 1;
1727 cma_dev = list_entry(dev_list.next, struct cma_device, list);
e51060f0
SH		 1728
1729port_found:
f0ee3404 1730 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid);
e51060f0
SH		 1731 if (ret)
1732 goto out;
1733
1734 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
1735 if (ret)
1736 goto out;
1737
f0ee3404 1738 ib_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0
SH		 1739 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
1740 id_priv->id.port_num = p;
1741 cma_attach_to_dev(id_priv, cma_dev);
1742out:
1743 mutex_unlock(&lock);
1744 return ret;
1745}
1746
1747static void addr_handler(int status, struct sockaddr *src_addr,
1748 struct rdma_dev_addr *dev_addr, void *context)
1749{
1750 struct rdma_id_private *id_priv = context;
a1b1b61f 1751 struct rdma_cm_event event;
e51060f0 1752
a1b1b61f 1753 memset(&event, 0, sizeof event);
e51060f0 1754 atomic_inc(&id_priv->dev_remove);
61a73c70
SH		 1755
1756 /*
1757 * Grab mutex to block rdma_destroy_id() from removing the device while
1758 * we're trying to acquire it.
1759 */
1760 mutex_lock(&lock);
1761 if (!cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_RESOLVED)) {
1762 mutex_unlock(&lock);
1763 goto out;
1764 }
1765
1766 if (!status && !id_priv->cma_dev)
e51060f0 1767 status = cma_acquire_dev(id_priv);
61a73c70 1768 mutex_unlock(&lock);
e51060f0
SH		 1769
1770 if (status) {
61a73c70 1771 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ADDR_BOUND))
e51060f0 1772 goto out;
a1b1b61f
SH		 1773 event.event = RDMA_CM_EVENT_ADDR_ERROR;
1774 event.status = status;
e51060f0 1775 } else {
e51060f0
SH		 1776 memcpy(&id_priv->id.route.addr.src_addr, src_addr,
1777 ip_addr_size(src_addr));
a1b1b61f 1778 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
e51060f0
SH		 1779 }
1780
a1b1b61f 1781 if (id_priv->id.event_handler(&id_priv->id, &event)) {
e51060f0 1782 cma_exch(id_priv, CMA_DESTROYING);
8aa08602 1783 cma_enable_remove(id_priv);
e51060f0
SH		 1784 cma_deref_id(id_priv);
1785 rdma_destroy_id(&id_priv->id);
1786 return;
1787 }
1788out:
8aa08602 1789 cma_enable_remove(id_priv);
e51060f0
SH		 1790 cma_deref_id(id_priv);
1791}
1792
1793static int cma_resolve_loopback(struct rdma_id_private *id_priv)
1794{
1795 struct cma_work *work;
1796 struct sockaddr_in *src_in, *dst_in;
f0ee3404 1797 union ib_gid gid;
e51060f0
SH		 1798 int ret;
1799
1800 work = kzalloc(sizeof *work, GFP_KERNEL);
1801 if (!work)
1802 return -ENOMEM;
1803
1804 if (!id_priv->cma_dev) {
1805 ret = cma_bind_loopback(id_priv);
1806 if (ret)
1807 goto err;
1808 }
1809
f0ee3404
MT		 1810 ib_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
1811 ib_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0
SH		 1812
1813 if (cma_zero_addr(&id_priv->id.route.addr.src_addr)) {
1814 src_in = (struct sockaddr_in *)&id_priv->id.route.addr.src_addr;
1815 dst_in = (struct sockaddr_in *)&id_priv->id.route.addr.dst_addr;
1816 src_in->sin_family = dst_in->sin_family;
1817 src_in->sin_addr.s_addr = dst_in->sin_addr.s_addr;
1818 }
1819
1820 work->id = id_priv;
c4028958 1821 INIT_WORK(&work->work, cma_work_handler);
e51060f0
SH		 1822 work->old_state = CMA_ADDR_QUERY;
1823 work->new_state = CMA_ADDR_RESOLVED;
1824 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
1825 queue_work(cma_wq, &work->work);
1826 return 0;
1827err:
1828 kfree(work);
1829 return ret;
1830}
1831
1832static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
1833 struct sockaddr *dst_addr)
1834{
1835 if (src_addr && src_addr->sa_family)
1836 return rdma_bind_addr(id, src_addr);
1837 else
1838 return cma_bind_any(id, dst_addr->sa_family);
1839}
1840
1841int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
1842 struct sockaddr *dst_addr, int timeout_ms)
1843{
1844 struct rdma_id_private *id_priv;
1845 int ret;
1846
1847 id_priv = container_of(id, struct rdma_id_private, id);
1848 if (id_priv->state == CMA_IDLE) {
1849 ret = cma_bind_addr(id, src_addr, dst_addr);
1850 if (ret)
1851 return ret;
1852 }
1853
1854 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_ADDR_QUERY))
1855 return -EINVAL;
1856
1857 atomic_inc(&id_priv->refcount);
1858 memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr));
1859 if (cma_any_addr(dst_addr))
1860 ret = cma_resolve_loopback(id_priv);
1861 else
7a118df3
SH		 1862 ret = rdma_resolve_ip(&addr_client, &id->route.addr.src_addr,
1863 dst_addr, &id->route.addr.dev_addr,
e51060f0
SH		 1864 timeout_ms, addr_handler, id_priv);
1865 if (ret)
1866 goto err;
1867
1868 return 0;
1869err:
1870 cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_BOUND);
1871 cma_deref_id(id_priv);
1872 return ret;
1873}
1874EXPORT_SYMBOL(rdma_resolve_addr);
1875
1876static void cma_bind_port(struct rdma_bind_list *bind_list,
1877 struct rdma_id_private *id_priv)
1878{
1879 struct sockaddr_in *sin;
1880
1881 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1882 sin->sin_port = htons(bind_list->port);
1883 id_priv->bind_list = bind_list;
1884 hlist_add_head(&id_priv->node, &bind_list->owners);
1885}
1886
1887static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv,
1888 unsigned short snum)
1889{
1890 struct rdma_bind_list *bind_list;
aedec080 1891 int port, ret;
e51060f0 1892
cb164b8c 1893 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
e51060f0
SH		 1894 if (!bind_list)
1895 return -ENOMEM;
1896
aedec080
SH		 1897 do {
1898 ret = idr_get_new_above(ps, bind_list, snum, &port);
1899 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL));
1900
1901 if (ret)
1902 goto err1;
1903
1904 if (port != snum) {
1905 ret = -EADDRNOTAVAIL;
1906 goto err2;
1907 }
1908
1909 bind_list->ps = ps;
1910 bind_list->port = (unsigned short) port;
1911 cma_bind_port(bind_list, id_priv);
1912 return 0;
1913err2:
1914 idr_remove(ps, port);
1915err1:
1916 kfree(bind_list);
1917 return ret;
1918}
e51060f0 1919
aedec080
SH		 1920static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv)
1921{
1922 struct rdma_bind_list *bind_list;
227b60f5 1923 int port, ret, low, high;
aedec080
SH		 1924
1925 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
1926 if (!bind_list)
1927 return -ENOMEM;
1928
1929retry:
227b60f5 1930 /* FIXME: add proper port randomization per like inet_csk_get_port */
e51060f0 1931 do {
aedec080 1932 ret = idr_get_new_above(ps, bind_list, next_port, &port);
e51060f0
SH		 1933 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL));
1934
1935 if (ret)
aedec080 1936 goto err1;
e51060f0 1937
227b60f5
SH		 1938 inet_get_local_port_range(&low, &high);
1939 if (port > high) {
1940 if (next_port != low) {
aedec080 1941 idr_remove(ps, port);
227b60f5 1942 next_port = low;
aedec080
SH		 1943 goto retry;
1944 }
e51060f0 1945 ret = -EADDRNOTAVAIL;
aedec080 1946 goto err2;
e51060f0
SH		 1947 }
1948
227b60f5
SH		 1949 if (port == high)
1950 next_port = low;
aedec080
SH		 1951 else
1952 next_port = port + 1;
1953
e51060f0
SH		 1954 bind_list->ps = ps;
1955 bind_list->port = (unsigned short) port;
1956 cma_bind_port(bind_list, id_priv);
1957 return 0;
aedec080
SH		 1958err2:
1959 idr_remove(ps, port);
1960err1:
e51060f0
SH		 1961 kfree(bind_list);
1962 return ret;
1963}
1964
1965static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv)
1966{
1967 struct rdma_id_private *cur_id;
1968 struct sockaddr_in *sin, *cur_sin;
1969 struct rdma_bind_list *bind_list;
1970 struct hlist_node *node;
1971 unsigned short snum;
1972
1973 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1974 snum = ntohs(sin->sin_port);
1975 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
1976 return -EACCES;
1977
1978 bind_list = idr_find(ps, snum);
1979 if (!bind_list)
1980 return cma_alloc_port(ps, id_priv, snum);
1981
1982 /*
1983 * We don't support binding to any address if anyone is bound to
1984 * a specific address on the same port.
1985 */
1986 if (cma_any_addr(&id_priv->id.route.addr.src_addr))
1987 return -EADDRNOTAVAIL;
1988
1989 hlist_for_each_entry(cur_id, node, &bind_list->owners, node) {
1990 if (cma_any_addr(&cur_id->id.route.addr.src_addr))
1991 return -EADDRNOTAVAIL;
3cd96564 1992
e51060f0
SH		 1993 cur_sin = (struct sockaddr_in *) &cur_id->id.route.addr.src_addr;
1994 if (sin->sin_addr.s_addr == cur_sin->sin_addr.s_addr)
1995 return -EADDRINUSE;
1996 }
1997
1998 cma_bind_port(bind_list, id_priv);
1999 return 0;
2000}
2001
2002static int cma_get_port(struct rdma_id_private *id_priv)
2003{
2004 struct idr *ps;
2005 int ret;
2006
2007 switch (id_priv->id.ps) {
2008 case RDMA_PS_SDP:
2009 ps = &sdp_ps;
2010 break;
2011 case RDMA_PS_TCP:
2012 ps = &tcp_ps;
2013 break;
628e5f6d
SH		 2014 case RDMA_PS_UDP:
2015 ps = &udp_ps;
2016 break;
c8f6a362
SH		 2017 case RDMA_PS_IPOIB:
2018 ps = &ipoib_ps;
2019 break;
e51060f0
SH		 2020 default:
2021 return -EPROTONOSUPPORT;
2022 }
2023
2024 mutex_lock(&lock);
2025 if (cma_any_port(&id_priv->id.route.addr.src_addr))
aedec080 2026 ret = cma_alloc_any_port(ps, id_priv);
e51060f0
SH		 2027 else
2028 ret = cma_use_port(ps, id_priv);
2029 mutex_unlock(&lock);
2030
2031 return ret;
2032}
2033
2034int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
2035{
2036 struct rdma_id_private *id_priv;
2037 int ret;
2038
2039 if (addr->sa_family != AF_INET)
2040 return -EAFNOSUPPORT;
2041
2042 id_priv = container_of(id, struct rdma_id_private, id);
2043 if (!cma_comp_exch(id_priv, CMA_IDLE, CMA_ADDR_BOUND))
2044 return -EINVAL;
2045
2046 if (!cma_any_addr(addr)) {
2047 ret = rdma_translate_ip(addr, &id->route.addr.dev_addr);
e51060f0 2048 if (ret)
255d0c14
KK		 2049 goto err1;
2050
2051 mutex_lock(&lock);
2052 ret = cma_acquire_dev(id_priv);
2053 mutex_unlock(&lock);
2054 if (ret)
2055 goto err1;
e51060f0
SH		 2056 }
2057
2058 memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr));
2059 ret = cma_get_port(id_priv);
2060 if (ret)
255d0c14 2061 goto err2;
e51060f0
SH		 2062
2063 return 0;
255d0c14
KK		 2064err2:
2065 if (!cma_any_addr(addr)) {
2066 mutex_lock(&lock);
2067 cma_detach_from_dev(id_priv);
2068 mutex_unlock(&lock);
2069 }
2070err1:
e51060f0
SH		 2071 cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_IDLE);
2072 return ret;
2073}
2074EXPORT_SYMBOL(rdma_bind_addr);
2075
2076static int cma_format_hdr(void *hdr, enum rdma_port_space ps,
2077 struct rdma_route *route)
2078{
2079 struct sockaddr_in *src4, *dst4;
2080 struct cma_hdr *cma_hdr;
2081 struct sdp_hh *sdp_hdr;
2082
2083 src4 = (struct sockaddr_in *) &route->addr.src_addr;
2084 dst4 = (struct sockaddr_in *) &route->addr.dst_addr;
2085
2086 switch (ps) {
2087 case RDMA_PS_SDP:
2088 sdp_hdr = hdr;
2089 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2090 return -EINVAL;
2091 sdp_set_ip_ver(sdp_hdr, 4);
2092 sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2093 sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2094 sdp_hdr->port = src4->sin_port;
2095 break;
2096 default:
2097 cma_hdr = hdr;
2098 cma_hdr->cma_version = CMA_VERSION;
2099 cma_set_ip_ver(cma_hdr, 4);
2100 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2101 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2102 cma_hdr->port = src4->sin_port;
2103 break;
2104 }
2105 return 0;
2106}
2107
628e5f6d
SH		 2108static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
2109 struct ib_cm_event *ib_event)
2110{
2111 struct rdma_id_private *id_priv = cm_id->context;
2112 struct rdma_cm_event event;
2113 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
2114 int ret = 0;
2115
8aa08602
SH		 2116 if (cma_disable_remove(id_priv, CMA_CONNECT))
2117 return 0;
628e5f6d 2118
8aa08602 2119 memset(&event, 0, sizeof event);
628e5f6d
SH		 2120 switch (ib_event->event) {
2121 case IB_CM_SIDR_REQ_ERROR:
2122 event.event = RDMA_CM_EVENT_UNREACHABLE;
2123 event.status = -ETIMEDOUT;
2124 break;
2125 case IB_CM_SIDR_REP_RECEIVED:
2126 event.param.ud.private_data = ib_event->private_data;
2127 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
2128 if (rep->status != IB_SIDR_SUCCESS) {
2129 event.event = RDMA_CM_EVENT_UNREACHABLE;
2130 event.status = ib_event->param.sidr_rep_rcvd.status;
2131 break;
2132 }
c8f6a362 2133 if (id_priv->qkey != rep->qkey) {
628e5f6d
SH		 2134 event.event = RDMA_CM_EVENT_UNREACHABLE;
2135 event.status = -EINVAL;
2136 break;
2137 }
2138 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
2139 id_priv->id.route.path_rec,
2140 &event.param.ud.ah_attr);
2141 event.param.ud.qp_num = rep->qpn;
2142 event.param.ud.qkey = rep->qkey;
2143 event.event = RDMA_CM_EVENT_ESTABLISHED;
2144 event.status = 0;
2145 break;
2146 default:
2147 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d",
2148 ib_event->event);
2149 goto out;
2150 }
2151
2152 ret = id_priv->id.event_handler(&id_priv->id, &event);
2153 if (ret) {
2154 /* Destroy the CM ID by returning a non-zero value. */
2155 id_priv->cm_id.ib = NULL;
2156 cma_exch(id_priv, CMA_DESTROYING);
8aa08602 2157 cma_enable_remove(id_priv);
628e5f6d
SH		 2158 rdma_destroy_id(&id_priv->id);
2159 return ret;
2160 }
2161out:
8aa08602 2162 cma_enable_remove(id_priv);
628e5f6d
SH		 2163 return ret;
2164}
2165
2166static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
2167 struct rdma_conn_param *conn_param)
2168{
2169 struct ib_cm_sidr_req_param req;
2170 struct rdma_route *route;
2171 int ret;
2172
2173 req.private_data_len = sizeof(struct cma_hdr) +
2174 conn_param->private_data_len;
2175 req.private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2176 if (!req.private_data)
2177 return -ENOMEM;
2178
2179 if (conn_param->private_data && conn_param->private_data_len)
2180 memcpy((void *) req.private_data + sizeof(struct cma_hdr),
2181 conn_param->private_data, conn_param->private_data_len);
2182
2183 route = &id_priv->id.route;
2184 ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route);
2185 if (ret)
2186 goto out;
2187
2188 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device,
2189 cma_sidr_rep_handler, id_priv);
2190 if (IS_ERR(id_priv->cm_id.ib)) {
2191 ret = PTR_ERR(id_priv->cm_id.ib);
2192 goto out;
2193 }
2194
2195 req.path = route->path_rec;
2196 req.service_id = cma_get_service_id(id_priv->id.ps,
2197 &route->addr.dst_addr);
2198 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
2199 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2200
2201 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
2202 if (ret) {
2203 ib_destroy_cm_id(id_priv->cm_id.ib);
2204 id_priv->cm_id.ib = NULL;
2205 }
2206out:
2207 kfree(req.private_data);
2208 return ret;
2209}
2210
e51060f0
SH		 2211static int cma_connect_ib(struct rdma_id_private *id_priv,
2212 struct rdma_conn_param *conn_param)
2213{
2214 struct ib_cm_req_param req;
2215 struct rdma_route *route;
2216 void *private_data;
2217 int offset, ret;
2218
2219 memset(&req, 0, sizeof req);
2220 offset = cma_user_data_offset(id_priv->id.ps);
2221 req.private_data_len = offset + conn_param->private_data_len;
2222 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2223 if (!private_data)
2224 return -ENOMEM;
2225
2226 if (conn_param->private_data && conn_param->private_data_len)
2227 memcpy(private_data + offset, conn_param->private_data,
2228 conn_param->private_data_len);
2229
2230 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_ib_handler,
2231 id_priv);
2232 if (IS_ERR(id_priv->cm_id.ib)) {
2233 ret = PTR_ERR(id_priv->cm_id.ib);
2234 goto out;
2235 }
2236
2237 route = &id_priv->id.route;
2238 ret = cma_format_hdr(private_data, id_priv->id.ps, route);
2239 if (ret)
2240 goto out;
2241 req.private_data = private_data;
2242
2243 req.primary_path = &route->path_rec[0];
2244 if (route->num_paths == 2)
2245 req.alternate_path = &route->path_rec[1];
2246
2247 req.service_id = cma_get_service_id(id_priv->id.ps,
2248 &route->addr.dst_addr);
2249 req.qp_num = id_priv->qp_num;
9b2e9c0c 2250 req.qp_type = IB_QPT_RC;
e51060f0
SH		 2251 req.starting_psn = id_priv->seq_num;
2252 req.responder_resources = conn_param->responder_resources;
2253 req.initiator_depth = conn_param->initiator_depth;
2254 req.flow_control = conn_param->flow_control;
2255 req.retry_count = conn_param->retry_count;
2256 req.rnr_retry_count = conn_param->rnr_retry_count;
2257 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2258 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2259 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2260 req.srq = id_priv->srq ? 1 : 0;
2261
2262 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
2263out:
675a027c
KK		 2264 if (ret && !IS_ERR(id_priv->cm_id.ib)) {
2265 ib_destroy_cm_id(id_priv->cm_id.ib);
2266 id_priv->cm_id.ib = NULL;
2267 }
2268
e51060f0
SH		 2269 kfree(private_data);
2270 return ret;
2271}
2272
07ebafba
TT		 2273static int cma_connect_iw(struct rdma_id_private *id_priv,
2274 struct rdma_conn_param *conn_param)
2275{
2276 struct iw_cm_id *cm_id;
2277 struct sockaddr_in* sin;
2278 int ret;
2279 struct iw_cm_conn_param iw_param;
2280
2281 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
2282 if (IS_ERR(cm_id)) {
2283 ret = PTR_ERR(cm_id);
2284 goto out;
2285 }
2286
2287 id_priv->cm_id.iw = cm_id;
2288
2289 sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr;
2290 cm_id->local_addr = *sin;
2291
2292 sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr;
2293 cm_id->remote_addr = *sin;
2294
c5483388 2295 ret = cma_modify_qp_rtr(id_priv);
675a027c
KK		 2296 if (ret)
2297 goto out;
07ebafba
TT		 2298
2299 iw_param.ord = conn_param->initiator_depth;
2300 iw_param.ird = conn_param->responder_resources;
2301 iw_param.private_data = conn_param->private_data;
2302 iw_param.private_data_len = conn_param->private_data_len;
2303 if (id_priv->id.qp)
2304 iw_param.qpn = id_priv->qp_num;
2305 else
2306 iw_param.qpn = conn_param->qp_num;
2307 ret = iw_cm_connect(cm_id, &iw_param);
2308out:
675a027c
KK		 2309 if (ret && !IS_ERR(cm_id)) {
2310 iw_destroy_cm_id(cm_id);
2311 id_priv->cm_id.iw = NULL;
2312 }
07ebafba
TT		 2313 return ret;
2314}
2315
e51060f0
SH		 2316int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2317{
2318 struct rdma_id_private *id_priv;
2319 int ret;
2320
2321 id_priv = container_of(id, struct rdma_id_private, id);
2322 if (!cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_CONNECT))
2323 return -EINVAL;
2324
2325 if (!id->qp) {
2326 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 2327 id_priv->srq = conn_param->srq;
2328 }
2329
07ebafba
TT		 2330 switch (rdma_node_get_transport(id->device->node_type)) {
2331 case RDMA_TRANSPORT_IB:
c8f6a362 2332 if (cma_is_ud_ps(id->ps))
628e5f6d
SH		 2333 ret = cma_resolve_ib_udp(id_priv, conn_param);
2334 else
2335 ret = cma_connect_ib(id_priv, conn_param);
e51060f0 2336 break;
07ebafba
TT		 2337 case RDMA_TRANSPORT_IWARP:
2338 ret = cma_connect_iw(id_priv, conn_param);
2339 break;
e51060f0
SH		 2340 default:
2341 ret = -ENOSYS;
2342 break;
2343 }
2344 if (ret)
2345 goto err;
2346
2347 return 0;
2348err:
2349 cma_comp_exch(id_priv, CMA_CONNECT, CMA_ROUTE_RESOLVED);
2350 return ret;
2351}
2352EXPORT_SYMBOL(rdma_connect);
2353
2354static int cma_accept_ib(struct rdma_id_private *id_priv,
2355 struct rdma_conn_param *conn_param)
2356{
2357 struct ib_cm_rep_param rep;
0fe313b0
SH		 2358 struct ib_qp_attr qp_attr;
2359 int qp_attr_mask, ret;
e51060f0 2360
0fe313b0 2361 if (id_priv->id.qp) {
c5483388 2362 ret = cma_modify_qp_rtr(id_priv);
0fe313b0
SH		 2363 if (ret)
2364 goto out;
2365
2366 qp_attr.qp_state = IB_QPS_RTS;
2367 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, &qp_attr,
2368 &qp_attr_mask);
2369 if (ret)
2370 goto out;
2371
2372 qp_attr.max_rd_atomic = conn_param->initiator_depth;
2373 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
2374 if (ret)
2375 goto out;
2376 }
e51060f0
SH		 2377
2378 memset(&rep, 0, sizeof rep);
2379 rep.qp_num = id_priv->qp_num;
2380 rep.starting_psn = id_priv->seq_num;
2381 rep.private_data = conn_param->private_data;
2382 rep.private_data_len = conn_param->private_data_len;
2383 rep.responder_resources = conn_param->responder_resources;
2384 rep.initiator_depth = conn_param->initiator_depth;
e51060f0
SH		 2385 rep.failover_accepted = 0;
2386 rep.flow_control = conn_param->flow_control;
2387 rep.rnr_retry_count = conn_param->rnr_retry_count;
2388 rep.srq = id_priv->srq ? 1 : 0;
2389
0fe313b0
SH		 2390 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
2391out:
2392 return ret;
e51060f0
SH		 2393}
2394
07ebafba
TT		 2395static int cma_accept_iw(struct rdma_id_private *id_priv,
2396 struct rdma_conn_param *conn_param)
2397{
2398 struct iw_cm_conn_param iw_param;
2399 int ret;
2400
c5483388 2401 ret = cma_modify_qp_rtr(id_priv);
07ebafba
TT		 2402 if (ret)
2403 return ret;
2404
2405 iw_param.ord = conn_param->initiator_depth;
2406 iw_param.ird = conn_param->responder_resources;
2407 iw_param.private_data = conn_param->private_data;
2408 iw_param.private_data_len = conn_param->private_data_len;
2409 if (id_priv->id.qp) {
2410 iw_param.qpn = id_priv->qp_num;
2411 } else
2412 iw_param.qpn = conn_param->qp_num;
2413
2414 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
2415}
2416
628e5f6d
SH		 2417static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
2418 enum ib_cm_sidr_status status,
2419 const void *private_data, int private_data_len)
2420{
2421 struct ib_cm_sidr_rep_param rep;
2422
2423 memset(&rep, 0, sizeof rep);
2424 rep.status = status;
2425 if (status == IB_SIDR_SUCCESS) {
2426 rep.qp_num = id_priv->qp_num;
c8f6a362 2427 rep.qkey = id_priv->qkey;
628e5f6d
SH		 2428 }
2429 rep.private_data = private_data;
2430 rep.private_data_len = private_data_len;
2431
2432 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
2433}
2434
e51060f0
SH		 2435int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2436{
2437 struct rdma_id_private *id_priv;
2438 int ret;
2439
2440 id_priv = container_of(id, struct rdma_id_private, id);
2441 if (!cma_comp(id_priv, CMA_CONNECT))
2442 return -EINVAL;
2443
2444 if (!id->qp && conn_param) {
2445 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 2446 id_priv->srq = conn_param->srq;
2447 }
2448
07ebafba
TT		 2449 switch (rdma_node_get_transport(id->device->node_type)) {
2450 case RDMA_TRANSPORT_IB:
c8f6a362 2451 if (cma_is_ud_ps(id->ps))
628e5f6d
SH		 2452 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
2453 conn_param->private_data,
2454 conn_param->private_data_len);
2455 else if (conn_param)
e51060f0
SH		 2456 ret = cma_accept_ib(id_priv, conn_param);
2457 else
2458 ret = cma_rep_recv(id_priv);
2459 break;
07ebafba
TT		 2460 case RDMA_TRANSPORT_IWARP:
2461 ret = cma_accept_iw(id_priv, conn_param);
2462 break;
e51060f0
SH		 2463 default:
2464 ret = -ENOSYS;
2465 break;
2466 }
2467
2468 if (ret)
2469 goto reject;
2470
2471 return 0;
2472reject:
c5483388 2473 cma_modify_qp_err(id_priv);
e51060f0
SH		 2474 rdma_reject(id, NULL, 0);
2475 return ret;
2476}
2477EXPORT_SYMBOL(rdma_accept);
2478
0fe313b0
SH		 2479int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
2480{
2481 struct rdma_id_private *id_priv;
2482 int ret;
2483
2484 id_priv = container_of(id, struct rdma_id_private, id);
6c719f5c 2485 if (!cma_has_cm_dev(id_priv))
0fe313b0
SH		 2486 return -EINVAL;
2487
2488 switch (id->device->node_type) {
2489 case RDMA_NODE_IB_CA:
2490 ret = ib_cm_notify(id_priv->cm_id.ib, event);
2491 break;
2492 default:
2493 ret = 0;
2494 break;
2495 }
2496 return ret;
2497}
2498EXPORT_SYMBOL(rdma_notify);
2499
e51060f0
SH		 2500int rdma_reject(struct rdma_cm_id *id, const void *private_data,
2501 u8 private_data_len)
2502{
2503 struct rdma_id_private *id_priv;
2504 int ret;
2505
2506 id_priv = container_of(id, struct rdma_id_private, id);
6c719f5c 2507 if (!cma_has_cm_dev(id_priv))
e51060f0
SH		 2508 return -EINVAL;
2509
07ebafba
TT		 2510 switch (rdma_node_get_transport(id->device->node_type)) {
2511 case RDMA_TRANSPORT_IB:
c8f6a362 2512 if (cma_is_ud_ps(id->ps))
628e5f6d
SH		 2513 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT,
2514 private_data, private_data_len);
2515 else
2516 ret = ib_send_cm_rej(id_priv->cm_id.ib,
2517 IB_CM_REJ_CONSUMER_DEFINED, NULL,
2518 0, private_data, private_data_len);
e51060f0 2519 break;
07ebafba
TT		 2520 case RDMA_TRANSPORT_IWARP:
2521 ret = iw_cm_reject(id_priv->cm_id.iw,
2522 private_data, private_data_len);
2523 break;
e51060f0
SH		 2524 default:
2525 ret = -ENOSYS;
2526 break;
2527 }
2528 return ret;
2529}
2530EXPORT_SYMBOL(rdma_reject);
2531
2532int rdma_disconnect(struct rdma_cm_id *id)
2533{
2534 struct rdma_id_private *id_priv;
2535 int ret;
2536
2537 id_priv = container_of(id, struct rdma_id_private, id);
6c719f5c 2538 if (!cma_has_cm_dev(id_priv))
e51060f0
SH		 2539 return -EINVAL;
2540
07ebafba
TT		 2541 switch (rdma_node_get_transport(id->device->node_type)) {
2542 case RDMA_TRANSPORT_IB:
c5483388 2543 ret = cma_modify_qp_err(id_priv);
07ebafba
TT		 2544 if (ret)
2545 goto out;
e51060f0
SH		 2546 /* Initiate or respond to a disconnect. */
2547 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
2548 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
2549 break;
07ebafba
TT		 2550 case RDMA_TRANSPORT_IWARP:
2551 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
2552 break;
e51060f0 2553 default:
07ebafba 2554 ret = -EINVAL;
e51060f0
SH		 2555 break;
2556 }
2557out:
2558 return ret;
2559}
2560EXPORT_SYMBOL(rdma_disconnect);
2561
c8f6a362
SH		 2562static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
2563{
2564 struct rdma_id_private *id_priv;
2565 struct cma_multicast *mc = multicast->context;
2566 struct rdma_cm_event event;
2567 int ret;
2568
2569 id_priv = mc->id_priv;
8aa08602
SH		 2570 if (cma_disable_remove(id_priv, CMA_ADDR_BOUND) &&
2571 cma_disable_remove(id_priv, CMA_ADDR_RESOLVED))
2572 return 0;
c8f6a362 2573
c5483388 2574 mutex_lock(&id_priv->qp_mutex);
c8f6a362
SH		 2575 if (!status && id_priv->id.qp)
2576 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
2577 multicast->rec.mlid);
c5483388 2578 mutex_unlock(&id_priv->qp_mutex);
c8f6a362
SH		 2579
2580 memset(&event, 0, sizeof event);
2581 event.status = status;
2582 event.param.ud.private_data = mc->context;
2583 if (!status) {
2584 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
2585 ib_init_ah_from_mcmember(id_priv->id.device,
2586 id_priv->id.port_num, &multicast->rec,
2587 &event.param.ud.ah_attr);
2588 event.param.ud.qp_num = 0xFFFFFF;
2589 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
2590 } else
2591 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
2592
2593 ret = id_priv->id.event_handler(&id_priv->id, &event);
2594 if (ret) {
2595 cma_exch(id_priv, CMA_DESTROYING);
8aa08602 2596 cma_enable_remove(id_priv);
c8f6a362
SH		 2597 rdma_destroy_id(&id_priv->id);
2598 return 0;
2599 }
8aa08602
SH		 2600
2601 cma_enable_remove(id_priv);
c8f6a362
SH		 2602 return 0;
2603}
2604
2605static void cma_set_mgid(struct rdma_id_private *id_priv,
2606 struct sockaddr *addr, union ib_gid *mgid)
2607{
2608 unsigned char mc_map[MAX_ADDR_LEN];
2609 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2610 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
2611 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
2612
2613 if (cma_any_addr(addr)) {
2614 memset(mgid, 0, sizeof *mgid);
2615 } else if ((addr->sa_family == AF_INET6) &&
2616 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFF10A01B) ==
2617 0xFF10A01B)) {
2618 /* IPv6 address is an SA assigned MGID. */
2619 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
2620 } else {
2621 ip_ib_mc_map(sin->sin_addr.s_addr, mc_map);
2622 if (id_priv->id.ps == RDMA_PS_UDP)
2623 mc_map[7] = 0x01; /* Use RDMA CM signature */
2624 mc_map[8] = ib_addr_get_pkey(dev_addr) >> 8;
2625 mc_map[9] = (unsigned char) ib_addr_get_pkey(dev_addr);
2626 *mgid = *(union ib_gid *) (mc_map + 4);
2627 }
2628}
2629
2630static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
2631 struct cma_multicast *mc)
2632{
2633 struct ib_sa_mcmember_rec rec;
2634 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2635 ib_sa_comp_mask comp_mask;
2636 int ret;
2637
2638 ib_addr_get_mgid(dev_addr, &rec.mgid);
2639 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
2640 &rec.mgid, &rec);
2641 if (ret)
2642 return ret;
2643
2644 cma_set_mgid(id_priv, &mc->addr, &rec.mgid);
2645 if (id_priv->id.ps == RDMA_PS_UDP)
2646 rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
2647 ib_addr_get_sgid(dev_addr, &rec.port_gid);
2648 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
2649 rec.join_state = 1;
2650
2651 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
2652 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
2653 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
2654 IB_SA_MCMEMBER_REC_FLOW_LABEL |
2655 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
2656
2657 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
2658 id_priv->id.port_num, &rec,
2659 comp_mask, GFP_KERNEL,
2660 cma_ib_mc_handler, mc);
2661 if (IS_ERR(mc->multicast.ib))
2662 return PTR_ERR(mc->multicast.ib);
2663
2664 return 0;
2665}
2666
2667int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
2668 void *context)
2669{
2670 struct rdma_id_private *id_priv;
2671 struct cma_multicast *mc;
2672 int ret;
2673
2674 id_priv = container_of(id, struct rdma_id_private, id);
2675 if (!cma_comp(id_priv, CMA_ADDR_BOUND) &&
2676 !cma_comp(id_priv, CMA_ADDR_RESOLVED))
2677 return -EINVAL;
2678
2679 mc = kmalloc(sizeof *mc, GFP_KERNEL);
2680 if (!mc)
2681 return -ENOMEM;
2682
2683 memcpy(&mc->addr, addr, ip_addr_size(addr));
2684 mc->context = context;
2685 mc->id_priv = id_priv;
2686
2687 spin_lock(&id_priv->lock);
2688 list_add(&mc->list, &id_priv->mc_list);
2689 spin_unlock(&id_priv->lock);
2690
2691 switch (rdma_node_get_transport(id->device->node_type)) {
2692 case RDMA_TRANSPORT_IB:
2693 ret = cma_join_ib_multicast(id_priv, mc);
2694 break;
2695 default:
2696 ret = -ENOSYS;
2697 break;
2698 }
2699
2700 if (ret) {
2701 spin_lock_irq(&id_priv->lock);
2702 list_del(&mc->list);
2703 spin_unlock_irq(&id_priv->lock);
2704 kfree(mc);
2705 }
2706 return ret;
2707}
2708EXPORT_SYMBOL(rdma_join_multicast);
2709
2710void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
2711{
2712 struct rdma_id_private *id_priv;
2713 struct cma_multicast *mc;
2714
2715 id_priv = container_of(id, struct rdma_id_private, id);
2716 spin_lock_irq(&id_priv->lock);
2717 list_for_each_entry(mc, &id_priv->mc_list, list) {
2718 if (!memcmp(&mc->addr, addr, ip_addr_size(addr))) {
2719 list_del(&mc->list);
2720 spin_unlock_irq(&id_priv->lock);
2721
2722 if (id->qp)
2723 ib_detach_mcast(id->qp,
2724 &mc->multicast.ib->rec.mgid,
2725 mc->multicast.ib->rec.mlid);
2726 ib_sa_free_multicast(mc->multicast.ib);
2727 kfree(mc);
2728 return;
2729 }
2730 }
2731 spin_unlock_irq(&id_priv->lock);
2732}
2733EXPORT_SYMBOL(rdma_leave_multicast);
2734
e51060f0
SH		 2735static void cma_add_one(struct ib_device *device)
2736{
2737 struct cma_device *cma_dev;
2738 struct rdma_id_private *id_priv;
2739
2740 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
2741 if (!cma_dev)
2742 return;
2743
2744 cma_dev->device = device;
e51060f0
SH		 2745
2746 init_completion(&cma_dev->comp);
2747 atomic_set(&cma_dev->refcount, 1);
2748 INIT_LIST_HEAD(&cma_dev->id_list);
2749 ib_set_client_data(device, &cma_client, cma_dev);
2750
2751 mutex_lock(&lock);
2752 list_add_tail(&cma_dev->list, &dev_list);
2753 list_for_each_entry(id_priv, &listen_any_list, list)
2754 cma_listen_on_dev(id_priv, cma_dev);
2755 mutex_unlock(&lock);
e51060f0
SH		 2756}
2757
2758static int cma_remove_id_dev(struct rdma_id_private *id_priv)
2759{
a1b1b61f 2760 struct rdma_cm_event event;
e51060f0
SH		 2761 enum cma_state state;
2762
2763 /* Record that we want to remove the device */
2764 state = cma_exch(id_priv, CMA_DEVICE_REMOVAL);
2765 if (state == CMA_DESTROYING)
2766 return 0;
2767
2768 cma_cancel_operation(id_priv, state);
2769 wait_event(id_priv->wait_remove, !atomic_read(&id_priv->dev_remove));
2770
2771 /* Check for destruction from another callback. */
2772 if (!cma_comp(id_priv, CMA_DEVICE_REMOVAL))
2773 return 0;
2774
a1b1b61f
SH		 2775 memset(&event, 0, sizeof event);
2776 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
2777 return id_priv->id.event_handler(&id_priv->id, &event);
e51060f0
SH		 2778}
2779
2780static void cma_process_remove(struct cma_device *cma_dev)
2781{
e51060f0
SH		 2782 struct rdma_id_private *id_priv;
2783 int ret;
2784
e51060f0
SH		 2785 mutex_lock(&lock);
2786 while (!list_empty(&cma_dev->id_list)) {
2787 id_priv = list_entry(cma_dev->id_list.next,
2788 struct rdma_id_private, list);
2789
2790 if (cma_internal_listen(id_priv)) {
2791 cma_destroy_listen(id_priv);
2792 continue;
2793 }
2794
94de178a 2795 list_del_init(&id_priv->list);
e51060f0
SH		 2796 atomic_inc(&id_priv->refcount);
2797 mutex_unlock(&lock);
2798
2799 ret = cma_remove_id_dev(id_priv);
2800 cma_deref_id(id_priv);
2801 if (ret)
2802 rdma_destroy_id(&id_priv->id);
2803
2804 mutex_lock(&lock);
2805 }
2806 mutex_unlock(&lock);
2807
2808 cma_deref_dev(cma_dev);
2809 wait_for_completion(&cma_dev->comp);
2810}
2811
2812static void cma_remove_one(struct ib_device *device)
2813{
2814 struct cma_device *cma_dev;
2815
2816 cma_dev = ib_get_client_data(device, &cma_client);
2817 if (!cma_dev)
2818 return;
2819
2820 mutex_lock(&lock);
2821 list_del(&cma_dev->list);
2822 mutex_unlock(&lock);
2823
2824 cma_process_remove(cma_dev);
2825 kfree(cma_dev);
2826}
2827
2828static int cma_init(void)
2829{
227b60f5 2830 int ret, low, high;
e51060f0 2831
aedec080 2832 get_random_bytes(&next_port, sizeof next_port);
227b60f5
SH		 2833 inet_get_local_port_range(&low, &high);
2834 next_port = ((unsigned int) next_port % (high - low)) + low;
2835
c7f743a6 2836 cma_wq = create_singlethread_workqueue("rdma_cm");
e51060f0
SH		 2837 if (!cma_wq)
2838 return -ENOMEM;
2839
c1a0b23b 2840 ib_sa_register_client(&sa_client);
7a118df3 2841 rdma_addr_register_client(&addr_client);
c1a0b23b 2842
e51060f0
SH		 2843 ret = ib_register_client(&cma_client);
2844 if (ret)
2845 goto err;
2846 return 0;
2847
2848err:
7a118df3 2849 rdma_addr_unregister_client(&addr_client);
c1a0b23b 2850 ib_sa_unregister_client(&sa_client);
e51060f0
SH		 2851 destroy_workqueue(cma_wq);
2852 return ret;
2853}
2854
2855static void cma_cleanup(void)
2856{
2857 ib_unregister_client(&cma_client);
7a118df3 2858 rdma_addr_unregister_client(&addr_client);
c1a0b23b 2859 ib_sa_unregister_client(&sa_client);
e51060f0
SH		 2860 destroy_workqueue(cma_wq);
2861 idr_destroy(&sdp_ps);
2862 idr_destroy(&tcp_ps);
628e5f6d 2863 idr_destroy(&udp_ps);
c8f6a362 2864 idr_destroy(&ipoib_ps);
e51060f0
SH		 2865}
2866
2867module_init(cma_init);
2868module_exit(cma_cleanup);
kernel source for telekom puls (alcatel/mediatek)