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.
7 * This Software is licensed under one of the following licenses:
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.
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.
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.
21 * Licensee has the right to choose one of the above licenses.
23 * Redistributions of source code must retain the above copyright
24 * notice and one of the license notices.
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.
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
35 #include <sys/param.h>
36 #include <sys/condvar.h>
37 #include <sys/systm.h>
38 #include <sys/kernel.h>
39 #include <sys/libkern.h>
40 #include <sys/socket.h>
41 #include <sys/module.h>
43 #include <sys/mutex.h>
44 #include <sys/rwlock.h>
45 #include <sys/queue.h>
46 #include <sys/taskqueue.h>
48 #include <sys/syslog.h>
51 #include <netinet/in.h>
52 #include <netinet/in_pcb.h>
54 #include <contrib/rdma/rdma_cm.h>
55 #include <contrib/rdma/ib_cache.h>
56 #include <contrib/rdma/ib_cm.h>
57 #include <contrib/rdma/ib_sa.h>
58 #include <contrib/rdma/iw_cm.h>
60 #define CMA_CM_RESPONSE_TIMEOUT 20
61 #define CMA_MAX_CM_RETRIES 15
63 static void cma_add_one(struct ib_device *device);
64 static void cma_remove_one(struct ib_device *device);
66 static struct ib_client cma_client = {
69 .remove = cma_remove_one
73 static struct ib_sa_client sa_client;
75 static struct rdma_addr_client addr_client;
76 static TAILQ_HEAD(, cma_device) dev_list;
77 static LIST_HEAD(, rdma_id_private) listen_any_list;
78 static struct mtx lock;
79 static struct taskqueue *cma_wq;
80 static DEFINE_KVL(sdp_ps);
81 static DEFINE_KVL(tcp_ps);
82 static DEFINE_KVL(udp_ps);
83 static DEFINE_KVL(ipoib_ps);
87 struct ib_device *device;
92 LIST_HEAD(, rdma_id_private) id_list;
93 TAILQ_ENTRY(cma_device) list;
110 struct rdma_bind_list {
112 TAILQ_HEAD(, rdma_id_private) owners;
117 * Device removal can occur at anytime, so we need extra handling to
118 * serialize notifying the user of device removal with other callbacks.
119 * We do this by disabling removal notification while a callback is in process,
120 * and reporting it after the callback completes.
122 struct rdma_id_private {
123 struct rdma_cm_id id;
125 struct rdma_bind_list *bind_list;
127 TAILQ_ENTRY(rdma_id_private) node;
128 LIST_ENTRY(rdma_id_private) list; /* listen_any_list or cma_dev.list */
129 LIST_HEAD(, rdma_id_private) listen_list; /* per-device listens */
130 LIST_ENTRY(rdma_id_private) listen_entry;
131 struct cma_device *cma_dev;
133 LIST_HEAD(, cma_multicast) mc_list;
135 enum cma_state state;
139 struct cv wait_remove;
144 struct ib_sa_query *query;
158 struct cma_multicast {
159 struct rdma_id_private *id_priv;
161 struct ib_sa_multicast *ib;
163 struct list_head list;
165 struct sockaddr addr;
166 u8 pad[sizeof(struct sockaddr_in6) -
167 sizeof(struct sockaddr)];
173 struct rdma_id_private *id;
174 enum cma_state old_state;
175 enum cma_state new_state;
176 struct rdma_cm_event event;
189 u8 ip_version; /* IP version: 7:4 */
191 union cma_ip_addr src_addr;
192 union cma_ip_addr dst_addr;
197 u8 sdp_version; /* Major version: 7:4 */
198 u8 ip_version; /* IP version: 7:4 */
199 u8 sdp_specific1[10];
202 union cma_ip_addr src_addr;
203 union cma_ip_addr dst_addr;
211 #define CMA_VERSION 0x00
212 #define SDP_MAJ_VERSION 0x2
214 static int cma_comp(struct rdma_id_private *id_priv, enum cma_state comp)
218 mtx_lock(&id_priv->lock);
219 ret = (id_priv->state == comp);
220 mtx_unlock(&id_priv->lock);
224 static int cma_comp_exch(struct rdma_id_private *id_priv,
225 enum cma_state comp, enum cma_state exch)
229 mtx_lock(&id_priv->lock);
230 if ((ret = (id_priv->state == comp)))
231 id_priv->state = exch;
232 mtx_unlock(&id_priv->lock);
236 static enum cma_state cma_exch(struct rdma_id_private *id_priv,
241 mtx_lock(&id_priv->lock);
242 old = id_priv->state;
243 id_priv->state = exch;
244 mtx_unlock(&id_priv->lock);
248 static inline u8 cma_get_ip_ver(struct cma_hdr *hdr)
250 return hdr->ip_version >> 4;
253 static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
255 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
258 static inline u8 sdp_get_majv(u8 sdp_version)
260 return sdp_version >> 4;
263 static inline u8 sdp_get_ip_ver(struct sdp_hh *hh)
265 return hh->ip_version >> 4;
268 static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver)
270 hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF);
273 static inline int cma_is_ud_ps(enum rdma_port_space ps)
275 return (ps == RDMA_PS_UDP || ps == RDMA_PS_IPOIB);
278 static void cma_attach_to_dev(struct rdma_id_private *id_priv,
279 struct cma_device *cma_dev)
281 mtx_lock(&cma_dev->lock);
283 mtx_unlock(&cma_dev->lock);
284 id_priv->cma_dev = cma_dev;
285 id_priv->id.device = cma_dev->device;
286 LIST_INSERT_HEAD(&cma_dev->id_list, id_priv, list);
289 static inline void cma_deref_dev(struct cma_device *cma_dev)
291 mtx_lock(&cma_dev->lock);
292 if (--cma_dev->refcount == 0)
293 cv_broadcast(&cma_dev->comp);
294 mtx_unlock(&cma_dev->lock);
297 static void cma_detach_from_dev(struct rdma_id_private *id_priv)
299 LIST_REMOVE(id_priv, list);
300 cma_deref_dev(id_priv->cma_dev);
301 id_priv->cma_dev = NULL;
305 static int cma_set_qkey(struct ib_device *device, u8 port_num,
306 enum rdma_port_space ps,
307 struct rdma_dev_addr *dev_addr, u32 *qkey)
309 struct ib_sa_mcmember_rec rec;
314 *qkey = RDMA_UDP_QKEY;
317 ib_addr_get_mgid(dev_addr, &rec.mgid);
318 ret = ib_sa_get_mcmember_rec(device, port_num, &rec.mgid, &rec);
319 *qkey = be32_to_cpu(rec.qkey);
328 static int cma_acquire_dev(struct rdma_id_private *id_priv)
330 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
331 struct cma_device *cma_dev;
335 switch (rdma_node_get_transport(dev_addr->dev_type)) {
337 case RDMA_TRANSPORT_IB:
338 ib_addr_get_sgid(dev_addr, &gid);
341 case RDMA_TRANSPORT_IWARP:
342 iw_addr_get_sgid(dev_addr, &gid);
348 TAILQ_FOREACH(cma_dev, &dev_list, list) {
349 ret = ib_find_cached_gid(cma_dev->device, &gid,
350 &id_priv->id.port_num, NULL);
353 ret = cma_set_qkey(cma_dev->device,
354 id_priv->id.port_num,
355 id_priv->id.ps, dev_addr,
359 cma_attach_to_dev(id_priv, cma_dev);
366 static void cma_deref_id(struct rdma_id_private *id_priv)
368 mtx_lock(&id_priv->lock);
369 if (--id_priv->refcount == 0) {
370 cv_broadcast(&id_priv->comp);
372 mtx_unlock(&id_priv->lock);
375 static int cma_disable_remove(struct rdma_id_private *id_priv,
376 enum cma_state state)
380 mtx_lock(&id_priv->lock);
381 if (id_priv->state == state) {
382 id_priv->dev_remove++;
386 mtx_unlock(&id_priv->lock);
390 static void cma_enable_remove(struct rdma_id_private *id_priv)
392 mtx_lock(&id_priv->lock);
393 if (--id_priv->dev_remove == 0)
394 cv_broadcast(&id_priv->wait_remove);
395 mtx_unlock(&id_priv->lock);
398 static int cma_has_cm_dev(struct rdma_id_private *id_priv)
400 return (id_priv->id.device && id_priv->cm_id.ib);
403 struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
404 void *context, enum rdma_port_space ps)
406 struct rdma_id_private *id_priv;
408 id_priv = malloc(sizeof *id_priv, M_DEVBUF, M_NOWAIT);
410 return ERR_PTR(-ENOMEM);
411 bzero(id_priv, sizeof *id_priv);
413 id_priv->state = CMA_IDLE;
414 id_priv->id.context = context;
415 id_priv->id.event_handler = event_handler;
417 mtx_init(&id_priv->lock, "rdma_cm_id_priv", NULL, MTX_DUPOK|MTX_DEF);
418 cv_init(&id_priv->comp, "rdma_cm_id_priv");
419 id_priv->refcount = 1;
420 cv_init(&id_priv->wait_remove, "id priv wait remove");
421 LIST_INIT(&id_priv->listen_list);
422 arc4rand(&id_priv->seq_num, sizeof id_priv->seq_num, 0);
427 static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
429 struct ib_qp_attr qp_attr;
430 int qp_attr_mask, ret;
432 qp_attr.qp_state = IB_QPS_INIT;
433 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
437 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
441 qp_attr.qp_state = IB_QPS_RTR;
442 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
446 qp_attr.qp_state = IB_QPS_RTS;
448 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
453 static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
455 struct ib_qp_attr qp_attr;
456 int qp_attr_mask, ret;
458 qp_attr.qp_state = IB_QPS_INIT;
459 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
463 return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
466 int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
467 struct ib_qp_init_attr *qp_init_attr)
469 struct rdma_id_private *id_priv;
473 id_priv = container_of(id, struct rdma_id_private, id);
474 if (id->device != pd->device)
477 qp = ib_create_qp(pd, qp_init_attr);
480 if (cma_is_ud_ps(id_priv->id.ps))
481 ret = cma_init_ud_qp(id_priv, qp);
483 ret = cma_init_conn_qp(id_priv, qp);
488 id_priv->qp_num = qp->qp_num;
489 id_priv->srq = (qp->srq != NULL);
496 void rdma_destroy_qp(struct rdma_cm_id *id)
498 ib_destroy_qp(id->qp);
501 static int cma_modify_qp_rtr(struct rdma_cm_id *id)
503 struct ib_qp_attr qp_attr;
504 int qp_attr_mask, ret;
509 /* Need to update QP attributes from default values. */
510 qp_attr.qp_state = IB_QPS_INIT;
511 ret = rdma_init_qp_attr(id, &qp_attr, &qp_attr_mask);
515 ret = ib_modify_qp(id->qp, &qp_attr, qp_attr_mask);
519 qp_attr.qp_state = IB_QPS_RTR;
520 ret = rdma_init_qp_attr(id, &qp_attr, &qp_attr_mask);
524 return ib_modify_qp(id->qp, &qp_attr, qp_attr_mask);
528 static int cma_modify_qp_rts(struct rdma_cm_id *id)
530 struct ib_qp_attr qp_attr;
531 int qp_attr_mask, ret;
536 qp_attr.qp_state = IB_QPS_RTS;
537 ret = rdma_init_qp_attr(id, &qp_attr, &qp_attr_mask);
541 return ib_modify_qp(id->qp, &qp_attr, qp_attr_mask);
545 static int cma_modify_qp_err(struct rdma_cm_id *id)
547 struct ib_qp_attr qp_attr;
552 qp_attr.qp_state = IB_QPS_ERR;
553 return ib_modify_qp(id->qp, &qp_attr, IB_QP_STATE);
557 static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
558 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
560 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
563 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
564 ib_addr_get_pkey(dev_addr),
565 &qp_attr->pkey_index);
569 qp_attr->port_num = id_priv->id.port_num;
570 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
572 if (cma_is_ud_ps(id_priv->id.ps)) {
573 qp_attr->qkey = id_priv->qkey;
574 *qp_attr_mask |= IB_QP_QKEY;
576 qp_attr->qp_access_flags = 0;
577 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
583 int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
586 struct rdma_id_private *id_priv;
589 id_priv = container_of(id, struct rdma_id_private, id);
591 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
592 case RDMA_TRANSPORT_IB:
593 if (!id_priv->cm_id.ib || cma_is_ud_ps(id_priv->id.ps))
594 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
596 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
598 if (qp_attr->qp_state == IB_QPS_RTR)
599 qp_attr->rq_psn = id_priv->seq_num;
601 case RDMA_TRANSPORT_IWARP:
603 if (!id_priv->cm_id.iw) {
604 qp_attr->qp_access_flags = IB_ACCESS_LOCAL_WRITE;
605 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
607 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
620 static inline int cma_zero_addr(struct sockaddr *addr)
622 struct in6_addr *ip6;
624 if (addr->sa_family == AF_INET)
625 return in_nullhost(((struct sockaddr_in *) addr)->sin_addr);
627 ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr;
628 return (ip6->s6_addr32[0] | ip6->s6_addr32[1] |
629 ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0;
633 static inline int cma_loopback_addr(struct sockaddr *addr)
635 return ((struct sockaddr_in *)addr)->sin_addr.s_addr == INADDR_LOOPBACK;
638 static inline int cma_any_addr(struct sockaddr *addr)
640 return cma_zero_addr(addr) || cma_loopback_addr(addr);
643 static inline __be16 cma_port(struct sockaddr *addr)
645 if (addr->sa_family == AF_INET)
646 return ((struct sockaddr_in *) addr)->sin_port;
648 return ((struct sockaddr_in6 *) addr)->sin6_port;
651 static inline int cma_any_port(struct sockaddr *addr)
653 return !cma_port(addr);
657 static 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)
663 if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) !=
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;
673 if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION)
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;
683 if (*ip_ver != 4 && *ip_ver != 6)
688 static 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)
693 struct sockaddr_in *listen4, *ip4;
694 struct sockaddr_in6 *listen6, *ip6;
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;
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;
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;
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;
727 static inline int cma_user_data_offset(enum rdma_port_space ps)
733 return sizeof(struct cma_hdr);
737 static void cma_cancel_route(struct rdma_id_private *id_priv)
740 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
741 case RDMA_TRANSPORT_IB:
743 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
751 static inline int cma_internal_listen(struct rdma_id_private *id_priv)
753 return (id_priv->state == CMA_LISTEN) && id_priv->cma_dev &&
754 cma_any_addr(&id_priv->id.route.addr.src_addr);
757 static void cma_destroy_listen(struct rdma_id_private *id_priv)
759 cma_exch(id_priv, CMA_DESTROYING);
761 if (id_priv->cma_dev) {
763 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
764 case RDMA_TRANSPORT_IB:
765 if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib))
766 ib_destroy_cm_id(id_priv->cm_id.ib);
768 case RDMA_TRANSPORT_IWARP:
770 if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw))
771 iw_destroy_cm_id(id_priv->cm_id.iw);
778 cma_detach_from_dev(id_priv);
780 LIST_REMOVE(id_priv, listen_entry);
782 cma_deref_id(id_priv);
783 mtx_lock(&id_priv->lock);
784 if (id_priv->refcount)
785 cv_wait(&id_priv->comp, &id_priv->lock);
786 mtx_unlock(&id_priv->lock);
788 free(id_priv, M_DEVBUF);
791 static void cma_cancel_listens(struct rdma_id_private *id_priv)
793 struct rdma_id_private *dev_id_priv;
796 LIST_REMOVE(id_priv, list);
798 while (!LIST_EMPTY(&id_priv->listen_list)) {
799 dev_id_priv = LIST_FIRST(&id_priv->listen_list);
800 cma_destroy_listen(dev_id_priv);
805 static void cma_cancel_operation(struct rdma_id_private *id_priv,
806 enum cma_state state)
810 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
812 case CMA_ROUTE_QUERY:
813 cma_cancel_route(id_priv);
816 if (cma_any_addr(&id_priv->id.route.addr.src_addr) &&
818 cma_cancel_listens(id_priv);
825 static void cma_release_port(struct rdma_id_private *id_priv)
827 struct rdma_bind_list *bind_list = id_priv->bind_list;
833 TAILQ_REMOVE(&bind_list->owners, id_priv, node);
834 if (TAILQ_EMPTY(&bind_list->owners)) {
835 kvl_delete(bind_list->ps, bind_list->port);
836 free(bind_list, M_DEVBUF);
840 soclose(id_priv->so);
844 static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
846 struct cma_multicast *mc;
848 while (!LIST_EMPTY(&id_priv->mc_list)) {
849 mc = LIST_FIRST(&id_priv->mc_list);
850 LIST_REMOVE(mc, list);
851 ib_sa_free_multicast(mc->multicast.ib);
857 void rdma_destroy_id(struct rdma_cm_id *id)
859 struct rdma_id_private *id_priv;
860 enum cma_state state;
862 id_priv = container_of(id, struct rdma_id_private, id);
863 state = cma_exch(id_priv, CMA_DESTROYING);
864 cma_cancel_operation(id_priv, state);
867 if (id_priv->cma_dev) {
870 switch (rdma_node_get_transport(id->device->node_type)) {
871 case RDMA_TRANSPORT_IB:
872 if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib))
873 ib_destroy_cm_id(id_priv->cm_id.ib);
875 case RDMA_TRANSPORT_IWARP:
877 if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw))
878 iw_destroy_cm_id(id_priv->cm_id.iw);
884 cma_leave_mc_groups(id_priv);
887 cma_detach_from_dev(id_priv);
890 cma_release_port(id_priv);
891 cma_deref_id(id_priv);
892 mtx_lock(&id_priv->lock);
893 PANIC_IF(id_priv->refcount < 0);
894 if (id_priv->refcount)
895 cv_wait(&id_priv->comp, &id_priv->lock);
896 mtx_unlock(&id_priv->lock);
897 free(id_priv->id.route.path_rec, M_DEVBUF);
898 free(id_priv, M_DEVBUF);
902 static int cma_rep_recv(struct rdma_id_private *id_priv)
906 ret = cma_modify_qp_rtr(&id_priv->id);
910 ret = cma_modify_qp_rts(&id_priv->id);
914 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
920 cma_modify_qp_err(&id_priv->id);
921 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
926 static int cma_verify_rep(struct rdma_id_private *id_priv, void *data)
928 if (id_priv->id.ps == RDMA_PS_SDP &&
929 sdp_get_majv(((struct sdp_hah *) data)->sdp_version) !=
936 static void cma_set_rep_event_data(struct rdma_cm_event *event,
937 struct ib_cm_rep_event_param *rep_data,
940 event->param.conn.private_data = private_data;
941 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
942 event->param.conn.responder_resources = rep_data->responder_resources;
943 event->param.conn.initiator_depth = rep_data->initiator_depth;
944 event->param.conn.flow_control = rep_data->flow_control;
945 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
946 event->param.conn.srq = rep_data->srq;
947 event->param.conn.qp_num = rep_data->remote_qpn;
950 static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
952 struct rdma_id_private *id_priv = cm_id->context;
953 struct rdma_cm_event event;
956 if (cma_disable_remove(id_priv, CMA_CONNECT))
959 memset(&event, 0, sizeof event);
960 switch (ib_event->event) {
961 case IB_CM_REQ_ERROR:
962 case IB_CM_REP_ERROR:
963 event.event = RDMA_CM_EVENT_UNREACHABLE;
964 event.status = ETIMEDOUT;
966 case IB_CM_REP_RECEIVED:
967 event.status = cma_verify_rep(id_priv, ib_event->private_data);
969 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
970 else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) {
971 event.status = cma_rep_recv(id_priv);
972 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
973 RDMA_CM_EVENT_ESTABLISHED;
975 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
976 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
977 ib_event->private_data);
979 case IB_CM_RTU_RECEIVED:
980 case IB_CM_USER_ESTABLISHED:
981 event.event = RDMA_CM_EVENT_ESTABLISHED;
983 case IB_CM_DREQ_ERROR:
984 event.status = ETIMEDOUT; /* fall through */
985 case IB_CM_DREQ_RECEIVED:
986 case IB_CM_DREP_RECEIVED:
987 if (!cma_comp_exch(id_priv, CMA_CONNECT, CMA_DISCONNECT))
989 event.event = RDMA_CM_EVENT_DISCONNECTED;
991 case IB_CM_TIMEWAIT_EXIT:
992 case IB_CM_MRA_RECEIVED:
995 case IB_CM_REJ_RECEIVED:
996 cma_modify_qp_err(&id_priv->id);
997 event.status = ib_event->param.rej_rcvd.reason;
998 event.event = RDMA_CM_EVENT_REJECTED;
999 event.param.conn.private_data = ib_event->private_data;
1000 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
1003 log(LOG_ERR, "RDMA CMA: unexpected IB CM event: %d",
1008 ret = id_priv->id.event_handler(&id_priv->id, &event);
1010 /* Destroy the CM ID by returning a non-zero value. */
1011 id_priv->cm_id.ib = NULL;
1012 cma_exch(id_priv, CMA_DESTROYING);
1013 cma_enable_remove(id_priv);
1014 rdma_destroy_id(&id_priv->id);
1018 cma_enable_remove(id_priv);
1022 static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
1023 struct ib_cm_event *ib_event)
1025 struct rdma_id_private *id_priv;
1026 struct rdma_cm_id *id;
1027 struct rdma_route *rt;
1028 union cma_ip_addr *src, *dst;
1032 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1033 &ip_ver, &port, &src, &dst))
1036 id = rdma_create_id(listen_id->event_handler, listen_id->context,
1041 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1042 ip_ver, port, src, dst);
1045 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
1046 rt->path_rec = malloc(sizeof *rt->path_rec * rt->num_paths,
1047 M_DEVBUF, M_NOWAIT);
1051 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
1052 if (rt->num_paths == 2)
1053 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1055 ib_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
1056 ib_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
1057 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
1058 rt->addr.dev_addr.dev_type = RDMA_NODE_IB_CA;
1060 id_priv = container_of(id, struct rdma_id_private, id);
1061 id_priv->state = CMA_CONNECT;
1065 rdma_destroy_id(id);
1070 static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1071 struct ib_cm_event *ib_event)
1073 struct rdma_id_private *id_priv;
1074 struct rdma_cm_id *id;
1075 union cma_ip_addr *src, *dst;
1080 id = rdma_create_id(listen_id->event_handler, listen_id->context,
1086 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1087 &ip_ver, &port, &src, &dst))
1090 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1091 ip_ver, port, src, dst);
1093 ret = rdma_translate_ip(&id->route.addr.src_addr,
1094 &id->route.addr.dev_addr);
1098 id_priv = container_of(id, struct rdma_id_private, id);
1099 id_priv->state = CMA_CONNECT;
1102 rdma_destroy_id(id);
1106 static void cma_set_req_event_data(struct rdma_cm_event *event,
1107 struct ib_cm_req_event_param *req_data,
1108 void *private_data, int offset)
1110 event->param.conn.private_data = private_data + offset;
1111 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1112 event->param.conn.responder_resources = req_data->responder_resources;
1113 event->param.conn.initiator_depth = req_data->initiator_depth;
1114 event->param.conn.flow_control = req_data->flow_control;
1115 event->param.conn.retry_count = req_data->retry_count;
1116 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1117 event->param.conn.srq = req_data->srq;
1118 event->param.conn.qp_num = req_data->remote_qpn;
1121 static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1123 struct rdma_id_private *listen_id, *conn_id;
1124 struct rdma_cm_event event;
1127 listen_id = cm_id->context;
1128 if (cma_disable_remove(listen_id, CMA_LISTEN))
1129 return (ECONNABORTED);
1131 memset(&event, 0, sizeof event);
1132 offset = cma_user_data_offset(listen_id->id.ps);
1133 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1134 if (cma_is_ud_ps(listen_id->id.ps)) {
1135 conn_id = cma_new_udp_id(&listen_id->id, ib_event);
1136 event.param.ud.private_data = ib_event->private_data + offset;
1137 event.param.ud.private_data_len =
1138 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1140 conn_id = cma_new_conn_id(&listen_id->id, ib_event);
1141 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1142 ib_event->private_data, offset);
1149 mtx_lock(&conn_id->lock);
1150 conn_id->dev_remove++;
1151 mtx_unlock(&conn_id->lock);
1153 ret = cma_acquire_dev(conn_id);
1156 goto release_conn_id;
1158 conn_id->cm_id.ib = cm_id;
1159 cm_id->context = conn_id;
1160 cm_id->cm_handler = cma_ib_handler;
1162 ret = conn_id->id.event_handler(&conn_id->id, &event);
1166 /* Destroy the CM ID by returning a non-zero value. */
1167 conn_id->cm_id.ib = NULL;
1170 cma_exch(conn_id, CMA_DESTROYING);
1171 cma_enable_remove(conn_id);
1172 rdma_destroy_id(&conn_id->id);
1175 cma_enable_remove(listen_id);
1179 static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr)
1181 return cpu_to_be64(((u64)ps << 16) + be16_to_cpu(cma_port(addr)));
1184 static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr,
1185 struct ib_cm_compare_data *compare)
1187 struct cma_hdr *cma_data, *cma_mask;
1188 struct sdp_hh *sdp_data, *sdp_mask;
1190 struct in6_addr ip6_addr;
1192 memset(compare, 0, sizeof *compare);
1193 cma_data = (void *) compare->data;
1194 cma_mask = (void *) compare->mask;
1195 sdp_data = (void *) compare->data;
1196 sdp_mask = (void *) compare->mask;
1198 switch (addr->sa_family) {
1200 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1201 if (ps == RDMA_PS_SDP) {
1202 sdp_set_ip_ver(sdp_data, 4);
1203 sdp_set_ip_ver(sdp_mask, 0xF);
1204 sdp_data->dst_addr.ip4.addr = ip4_addr;
1205 sdp_mask->dst_addr.ip4.addr = ~0;
1207 cma_set_ip_ver(cma_data, 4);
1208 cma_set_ip_ver(cma_mask, 0xF);
1209 cma_data->dst_addr.ip4.addr = ip4_addr;
1210 cma_mask->dst_addr.ip4.addr = ~0;
1214 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr;
1215 if (ps == RDMA_PS_SDP) {
1216 sdp_set_ip_ver(sdp_data, 6);
1217 sdp_set_ip_ver(sdp_mask, 0xF);
1218 sdp_data->dst_addr.ip6 = ip6_addr;
1219 memset(&sdp_mask->dst_addr.ip6, 0xFF,
1220 sizeof sdp_mask->dst_addr.ip6);
1222 cma_set_ip_ver(cma_data, 6);
1223 cma_set_ip_ver(cma_mask, 0xF);
1224 cma_data->dst_addr.ip6 = ip6_addr;
1225 memset(&cma_mask->dst_addr.ip6, 0xFF,
1226 sizeof cma_mask->dst_addr.ip6);
1233 #endif /* IB_SUPPORTED */
1235 static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1237 struct rdma_id_private *id_priv = iw_id->context;
1238 struct rdma_cm_event event;
1239 struct sockaddr_in *sin;
1242 if (cma_disable_remove(id_priv, CMA_CONNECT))
1245 memset(&event, 0, sizeof event);
1246 switch (iw_event->event) {
1247 case IW_CM_EVENT_CLOSE:
1248 event.event = RDMA_CM_EVENT_DISCONNECTED;
1250 case IW_CM_EVENT_CONNECT_REPLY:
1251 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1252 *sin = iw_event->local_addr;
1253 sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr;
1254 *sin = iw_event->remote_addr;
1255 switch ((int)iw_event->status) {
1257 event.event = RDMA_CM_EVENT_ESTABLISHED;
1261 event.event = RDMA_CM_EVENT_REJECTED;
1264 event.event = RDMA_CM_EVENT_UNREACHABLE;
1267 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1271 case IW_CM_EVENT_ESTABLISHED:
1272 event.event = RDMA_CM_EVENT_ESTABLISHED;
1275 panic("unknown event type %d", iw_event->event);
1279 event.status = iw_event->status;
1280 event.param.conn.private_data = iw_event->private_data;
1281 event.param.conn.private_data_len = iw_event->private_data_len;
1282 ret = id_priv->id.event_handler(&id_priv->id, &event);
1284 /* Destroy the CM ID by returning a non-zero value. */
1285 id_priv->cm_id.iw = NULL;
1286 cma_exch(id_priv, CMA_DESTROYING);
1287 cma_enable_remove(id_priv);
1288 rdma_destroy_id(&id_priv->id);
1292 cma_enable_remove(id_priv);
1296 static int iw_conn_req_handler(struct iw_cm_id *cm_id,
1297 struct iw_cm_event *iw_event)
1299 struct rdma_cm_id *new_cm_id;
1300 struct rdma_id_private *listen_id, *conn_id;
1301 struct sockaddr_in *sin;
1303 struct rdma_cm_event event;
1308 listen_id = cm_id->context;
1309 if (cma_disable_remove(listen_id, CMA_LISTEN))
1310 return (ECONNABORTED);
1312 /* Create a new RDMA id for the new IW CM ID */
1313 new_cm_id = rdma_create_id(listen_id->id.event_handler,
1314 listen_id->id.context,
1320 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
1321 mtx_lock(&conn_id->lock);
1322 ++conn_id->dev_remove;
1323 mtx_unlock(&conn_id->lock);
1324 conn_id->state = CMA_CONNECT;
1326 port = iw_event->local_addr.sin_port;
1327 iw_event->local_addr.sin_port = 0;
1328 ifa = ifa_ifwithaddr((struct sockaddr *)&iw_event->local_addr);
1329 iw_event->local_addr.sin_port = port;
1331 ret = EADDRNOTAVAIL;
1332 cma_enable_remove(conn_id);
1333 rdma_destroy_id(new_cm_id);
1337 ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL);
1340 cma_enable_remove(conn_id);
1341 rdma_destroy_id(new_cm_id);
1346 ret = cma_acquire_dev(conn_id);
1349 cma_enable_remove(conn_id);
1350 rdma_destroy_id(new_cm_id);
1354 conn_id->cm_id.iw = cm_id;
1355 cm_id->context = conn_id;
1356 cm_id->cm_handler = cma_iw_handler;
1358 sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr;
1359 *sin = iw_event->local_addr;
1360 sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr;
1361 *sin = iw_event->remote_addr;
1362 conn_id->so = cm_id->so;
1364 memset(&event, 0, sizeof event);
1365 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1366 event.param.conn.private_data = iw_event->private_data;
1367 event.param.conn.private_data_len = iw_event->private_data_len;
1368 ret = conn_id->id.event_handler(&conn_id->id, &event);
1370 /* User wants to destroy the CM ID */
1371 conn_id->cm_id.iw = NULL;
1372 cma_exch(conn_id, CMA_DESTROYING);
1373 cma_enable_remove(conn_id);
1374 rdma_destroy_id(&conn_id->id);
1378 cma_enable_remove(listen_id);
1383 static int cma_ib_listen(struct rdma_id_private *id_priv)
1385 struct ib_cm_compare_data compare_data;
1386 struct sockaddr *addr;
1390 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_req_handler,
1392 if (IS_ERR(id_priv->cm_id.ib))
1393 return PTR_ERR(id_priv->cm_id.ib);
1395 addr = &id_priv->id.route.addr.src_addr;
1396 svc_id = cma_get_service_id(id_priv->id.ps, addr);
1397 if (cma_any_addr(addr))
1398 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL);
1400 cma_set_compare_data(id_priv->id.ps, addr, &compare_data);
1401 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data);
1405 ib_destroy_cm_id(id_priv->cm_id.ib);
1406 id_priv->cm_id.ib = NULL;
1413 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
1416 struct sockaddr_in *sin;
1418 id_priv->cm_id.iw = iw_create_cm_id(id_priv->id.device, id_priv->so,
1419 iw_conn_req_handler, id_priv);
1420 if (IS_ERR(id_priv->cm_id.iw))
1421 return PTR_ERR(id_priv->cm_id.iw);
1423 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1424 id_priv->cm_id.iw->local_addr = *sin;
1426 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
1429 iw_destroy_cm_id(id_priv->cm_id.iw);
1430 id_priv->cm_id.iw = NULL;
1436 static int cma_listen_handler(struct rdma_cm_id *id,
1437 struct rdma_cm_event *event)
1439 struct rdma_id_private *id_priv = id->context;
1441 id->context = id_priv->id.context;
1442 id->event_handler = id_priv->id.event_handler;
1443 return id_priv->id.event_handler(id, event);
1446 static void cma_listen_on_dev(struct rdma_id_private *id_priv,
1447 struct cma_device *cma_dev)
1449 struct rdma_id_private *dev_id_priv;
1450 struct rdma_cm_id *id;
1453 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps);
1457 dev_id_priv = container_of(id, struct rdma_id_private, id);
1459 dev_id_priv->state = CMA_ADDR_BOUND;
1460 memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr,
1461 ip_addr_size(&id_priv->id.route.addr.src_addr));
1462 dev_id_priv->so = id_priv->so; /* XXX */
1464 cma_attach_to_dev(dev_id_priv, cma_dev);
1465 LIST_INSERT_HEAD(&id_priv->listen_list, dev_id_priv, listen_entry);
1467 ret = rdma_listen(id, id_priv->backlog);
1473 cma_destroy_listen(dev_id_priv);
1476 static void cma_listen_on_all(struct rdma_id_private *id_priv)
1478 struct cma_device *cma_dev;
1481 LIST_INSERT_HEAD(&listen_any_list, id_priv, list);
1482 TAILQ_FOREACH(cma_dev, &dev_list, list)
1483 cma_listen_on_dev(id_priv, cma_dev);
1487 static int cma_bind_any(struct rdma_cm_id *id, sa_family_t af)
1489 struct sockaddr_in addr_in;
1491 memset(&addr_in, 0, sizeof addr_in);
1492 addr_in.sin_family = af;
1493 addr_in.sin_len = sizeof addr_in;
1494 return rdma_bind_addr(id, (struct sockaddr *) &addr_in);
1497 int rdma_listen(struct rdma_cm_id *id, int backlog)
1499 struct rdma_id_private *id_priv;
1502 id_priv = container_of(id, struct rdma_id_private, id);
1503 if (id_priv->state == CMA_IDLE) {
1504 ret = cma_bind_any(id, AF_INET);
1509 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_LISTEN))
1512 id_priv->backlog = backlog;
1515 switch (rdma_node_get_transport(id->device->node_type)) {
1516 case RDMA_TRANSPORT_IB:
1517 ret = cma_ib_listen(id_priv);
1521 case RDMA_TRANSPORT_IWARP:
1523 ret = cma_iw_listen(id_priv, backlog);
1534 cma_listen_on_all(id_priv);
1538 id_priv->backlog = 0;
1539 cma_comp_exch(id_priv, CMA_LISTEN, CMA_ADDR_BOUND);
1544 static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
1547 struct cma_work *work = context;
1548 struct rdma_route *route;
1550 route = &work->id->id.route;
1553 route->num_paths = 1;
1554 *route->path_rec = *path_rec;
1556 work->old_state = CMA_ROUTE_QUERY;
1557 work->new_state = CMA_ADDR_RESOLVED;
1558 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
1559 work->event.status = status;
1562 taskqueue_enqueue(cma_wq, &work->task);
1565 static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
1566 struct cma_work *work)
1568 struct rdma_dev_addr *addr = &id_priv->id.route.addr.dev_addr;
1569 struct ib_sa_path_rec path_rec;
1571 memset(&path_rec, 0, sizeof path_rec);
1572 ib_addr_get_sgid(addr, &path_rec.sgid);
1573 ib_addr_get_dgid(addr, &path_rec.dgid);
1574 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(addr));
1575 path_rec.numb_path = 1;
1576 path_rec.reversible = 1;
1578 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
1579 id_priv->id.port_num, &path_rec,
1580 IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
1581 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
1582 IB_SA_PATH_REC_REVERSIBLE,
1583 timeout_ms, M_NOWAIT,
1584 cma_query_handler, work, &id_priv->query);
1586 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
1590 static void cma_work_handler(void *context, int pending)
1592 struct cma_work *work = context;
1593 struct rdma_id_private *id_priv = work->id;
1596 mtx_lock(&id_priv->lock);
1597 ++id_priv->dev_remove;
1598 mtx_unlock(&id_priv->lock);
1599 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
1602 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1603 cma_exch(id_priv, CMA_DESTROYING);
1607 cma_enable_remove(id_priv);
1608 cma_deref_id(id_priv);
1610 rdma_destroy_id(&id_priv->id);
1611 free(work, M_DEVBUF);
1615 static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
1617 struct rdma_route *route = &id_priv->id.route;
1618 struct cma_work *work;
1621 work = malloc(sizeof *work, M_DEVBUF, M_NOWAIT);
1624 bzero(work, sizeof *work);
1627 TASK_INIT(&work->task, 0, cma_work_handler, work);
1628 work->old_state = CMA_ROUTE_QUERY;
1629 work->new_state = CMA_ROUTE_RESOLVED;
1630 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1632 route->path_rec = malloc(sizeof *route->path_rec, M_DEVBUF, M_NOWAIT);
1633 if (!route->path_rec) {
1638 ret = cma_query_ib_route(id_priv, timeout_ms, work);
1644 free(route->path_rec, M_DEVBUF);
1645 route->path_rec = NULL;
1647 free(work, M_DEVBUF);
1651 int rdma_set_ib_paths(struct rdma_cm_id *id,
1652 struct ib_sa_path_rec *path_rec, int num_paths)
1654 struct rdma_id_private *id_priv;
1657 id_priv = container_of(id, struct rdma_id_private, id);
1658 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_RESOLVED))
1661 id->route.path_rec = malloc(sizeof *path_rec * num_paths, M_DEVBUF, M_NOWAIT);
1662 if (!id->route.path_rec) {
1667 memcpy(id->route.path_rec, path_rec, sizeof *path_rec * num_paths);
1670 cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_ADDR_RESOLVED);
1675 static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
1677 struct cma_work *work;
1679 work = malloc(sizeof *work, M_DEVBUF, M_NOWAIT);
1682 bzero(work, sizeof *work);
1685 TASK_INIT(&work->task, 0, cma_work_handler, work);
1686 work->old_state = CMA_ROUTE_QUERY;
1687 work->new_state = CMA_ROUTE_RESOLVED;
1688 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1689 taskqueue_enqueue(cma_wq, &work->task);
1693 int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
1695 struct rdma_id_private *id_priv;
1698 id_priv = container_of(id, struct rdma_id_private, id);
1699 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_QUERY))
1702 mtx_lock(&id_priv->lock);
1703 id_priv->refcount++;
1704 mtx_unlock(&id_priv->lock);
1706 switch (rdma_node_get_transport(id->device->node_type)) {
1707 case RDMA_TRANSPORT_IB:
1708 ret = cma_resolve_ib_route(id_priv, timeout_ms);
1710 case RDMA_TRANSPORT_IWARP:
1712 ret = cma_resolve_iw_route(id_priv, timeout_ms);
1725 cma_comp_exch(id_priv, CMA_ROUTE_QUERY, CMA_ADDR_RESOLVED);
1726 cma_deref_id(id_priv);
1730 static int cma_bind_loopback(struct rdma_id_private *id_priv)
1732 struct cma_device *cma_dev;
1733 struct ib_port_attr port_attr;
1740 if (TAILQ_EMPTY(&dev_list)) {
1744 TAILQ_FOREACH(cma_dev, &dev_list, list)
1745 for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p)
1746 if (!ib_query_port(cma_dev->device, p, &port_attr) &&
1747 port_attr.state == IB_PORT_ACTIVE)
1751 cma_dev = TAILQ_FIRST(&dev_list);
1754 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid);
1758 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
1762 ib_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
1763 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
1764 id_priv->id.port_num = p;
1765 cma_attach_to_dev(id_priv, cma_dev);
1771 static void addr_handler(int status, struct sockaddr *src_addr,
1772 struct rdma_dev_addr *dev_addr, void *context)
1774 struct rdma_id_private *id_priv = context;
1775 struct rdma_cm_event event;
1777 memset(&event, 0, sizeof event);
1778 mtx_lock(&id_priv->lock);
1779 ++id_priv->dev_remove;
1780 mtx_unlock(&id_priv->lock);
1783 * Grab mutex to block rdma_destroy_id() from removing the device while
1784 * we're trying to acquire it.
1787 if (!cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_RESOLVED)) {
1792 if (!status && !id_priv->cma_dev)
1793 status = cma_acquire_dev(id_priv);
1797 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ADDR_BOUND))
1799 event.event = RDMA_CM_EVENT_ADDR_ERROR;
1800 event.status = status;
1802 memcpy(&id_priv->id.route.addr.src_addr, src_addr,
1803 ip_addr_size(src_addr));
1804 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
1807 if (id_priv->id.event_handler(&id_priv->id, &event)) {
1808 cma_exch(id_priv, CMA_DESTROYING);
1809 cma_enable_remove(id_priv);
1810 cma_deref_id(id_priv);
1811 rdma_destroy_id(&id_priv->id);
1815 cma_enable_remove(id_priv);
1816 cma_deref_id(id_priv);
1819 static int cma_resolve_loopback(struct rdma_id_private *id_priv)
1821 struct cma_work *work;
1822 struct sockaddr_in *src_in, *dst_in;
1826 work = malloc(sizeof *work, M_DEVBUF, M_NOWAIT);
1829 bzero(work, sizeof *work);
1831 if (!id_priv->cma_dev) {
1832 ret = cma_bind_loopback(id_priv);
1837 ib_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
1838 ib_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
1840 if (cma_zero_addr(&id_priv->id.route.addr.src_addr)) {
1841 src_in = (struct sockaddr_in *)&id_priv->id.route.addr.src_addr;
1842 dst_in = (struct sockaddr_in *)&id_priv->id.route.addr.dst_addr;
1843 src_in->sin_family = dst_in->sin_family;
1844 src_in->sin_addr.s_addr = dst_in->sin_addr.s_addr;
1848 TASK_INIT(&work->task, 0, cma_work_handler, work);
1849 work->old_state = CMA_ADDR_QUERY;
1850 work->new_state = CMA_ADDR_RESOLVED;
1851 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
1852 taskqueue_enqueue(cma_wq, &work->task);
1855 free(work, M_DEVBUF);
1859 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
1860 struct sockaddr *dst_addr)
1862 if (src_addr && src_addr->sa_family)
1863 return rdma_bind_addr(id, src_addr);
1865 return cma_bind_any(id, dst_addr->sa_family);
1868 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
1869 struct sockaddr *dst_addr, int timeout_ms)
1871 struct rdma_id_private *id_priv;
1874 id_priv = container_of(id, struct rdma_id_private, id);
1875 if (id_priv->state == CMA_IDLE) {
1876 ret = cma_bind_addr(id, src_addr, dst_addr);
1881 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_ADDR_QUERY))
1884 mtx_lock(&id_priv->lock);
1885 id_priv->refcount++;
1886 mtx_unlock(&id_priv->lock);
1887 memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr));
1888 if (cma_any_addr(dst_addr))
1889 ret = cma_resolve_loopback(id_priv);
1891 ret = rdma_resolve_ip(&addr_client, &id->route.addr.src_addr,
1892 dst_addr, &id->route.addr.dev_addr,
1893 timeout_ms, addr_handler, id_priv);
1899 cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_BOUND);
1900 cma_deref_id(id_priv);
1904 static void cma_bind_port(struct rdma_bind_list *bind_list,
1905 struct rdma_id_private *id_priv)
1907 struct sockaddr_in *sin;
1909 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1910 sin->sin_port = htons(bind_list->port);
1911 id_priv->bind_list = bind_list;
1912 TAILQ_INSERT_HEAD(&bind_list->owners, id_priv, node);
1915 static int cma_alloc_port(struct kvl *ps, struct rdma_id_private *id_priv,
1916 unsigned short snum)
1918 struct rdma_bind_list *bind_list;
1921 bind_list = malloc(sizeof *bind_list, M_DEVBUF, M_NOWAIT);
1924 bzero(bind_list, sizeof *bind_list);
1927 ret = kvl_alloc_above(ps, bind_list, snum, &port);
1928 } while (ret == EAGAIN);
1934 ret = EADDRNOTAVAIL;
1939 bind_list->port = (unsigned short) port;
1940 cma_bind_port(bind_list, id_priv);
1943 kvl_delete(ps, port);
1945 free(bind_list, M_DEVBUF);
1949 static int cma_alloc_any_port(struct kvl *ps, struct rdma_id_private *id_priv)
1951 struct rdma_bind_list *bind_list;
1954 bind_list = malloc(sizeof *bind_list, M_DEVBUF, M_NOWAIT);
1957 bzero(bind_list, sizeof *bind_list);
1961 ret = kvl_alloc_above(ps, bind_list, next_port, &port);
1962 } while (ret == EAGAIN);
1967 if (port > V_ipport_lastauto) {
1968 if (next_port != V_ipport_firstauto) {
1969 kvl_delete(ps, port);
1970 next_port = V_ipport_firstauto;
1973 ret = EADDRNOTAVAIL;
1977 if (port == V_ipport_lastauto)
1978 next_port = V_ipport_firstauto;
1980 next_port = port + 1;
1983 bind_list->port = (unsigned short) port;
1984 cma_bind_port(bind_list, id_priv);
1987 kvl_delete(ps, port);
1989 free(bind_list, M_DEVBUF);
1993 static int cma_use_port(struct kvl *ps, struct rdma_id_private *id_priv)
1995 struct rdma_id_private *cur_id;
1996 struct sockaddr_in *sin, *cur_sin;
1997 struct rdma_bind_list *bind_list;
1998 unsigned short snum;
2000 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
2001 snum = ntohs(sin->sin_port);
2002 if (snum <= V_ipport_reservedhigh && snum >= V_ipport_reservedlow &&
2003 priv_check(curthread, PRIV_NETINET_RESERVEDPORT))
2006 bind_list = kvl_lookup(ps, snum);
2008 return cma_alloc_port(ps, id_priv, snum);
2011 * We don't support binding to any address if anyone is bound to
2012 * a specific address on the same port.
2014 if (cma_any_addr(&id_priv->id.route.addr.src_addr))
2015 return (EADDRNOTAVAIL);
2017 TAILQ_FOREACH(cur_id, &bind_list->owners, node) {
2018 if (cma_any_addr(&cur_id->id.route.addr.src_addr))
2019 return (EADDRNOTAVAIL);
2021 cur_sin = (struct sockaddr_in *)&cur_id->id.route.addr.src_addr;
2022 if (sin->sin_addr.s_addr == cur_sin->sin_addr.s_addr)
2023 return (EADDRINUSE);
2026 cma_bind_port(bind_list, id_priv);
2030 static int cma_get_tcp_port(struct rdma_id_private *id_priv)
2035 ret = socreate(AF_INET, &so, SOCK_STREAM, IPPROTO_TCP,
2036 curthread->td_ucred, curthread);
2038 printf("%s socreate err %d\n", __FUNCTION__, ret);
2042 ret = sobind(so, (struct sockaddr *)&id_priv->id.route.addr.src_addr,
2052 static int cma_get_port(struct rdma_id_private *id_priv)
2057 switch (id_priv->id.ps) {
2063 ret = cma_get_tcp_port(id_priv); /* Synch with native stack */
2074 return (EPROTONOSUPPORT);
2078 if (cma_any_port(&id_priv->id.route.addr.src_addr))
2079 ret = cma_alloc_any_port(ps, id_priv);
2081 ret = cma_use_port(ps, id_priv);
2087 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
2089 struct rdma_id_private *id_priv;
2092 if (addr->sa_family != AF_INET)
2093 return (EAFNOSUPPORT);
2095 id_priv = container_of(id, struct rdma_id_private, id);
2096 if (!cma_comp_exch(id_priv, CMA_IDLE, CMA_ADDR_BOUND))
2099 if (!cma_any_addr(addr)) {
2100 ret = rdma_translate_ip(addr, &id->route.addr.dev_addr);
2105 ret = cma_acquire_dev(id_priv);
2111 memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr));
2112 ret = cma_get_port(id_priv);
2118 if (!cma_any_addr(addr)) {
2120 cma_detach_from_dev(id_priv);
2124 cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_IDLE);
2129 static int cma_format_hdr(void *hdr, enum rdma_port_space ps,
2130 struct rdma_route *route)
2132 struct sockaddr_in *src4, *dst4;
2133 struct cma_hdr *cma_hdr;
2134 struct sdp_hh *sdp_hdr;
2136 src4 = (struct sockaddr_in *) &route->addr.src_addr;
2137 dst4 = (struct sockaddr_in *) &route->addr.dst_addr;
2142 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2144 sdp_set_ip_ver(sdp_hdr, 4);
2145 sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2146 sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2147 sdp_hdr->port = src4->sin_port;
2151 cma_hdr->cma_version = CMA_VERSION;
2152 cma_set_ip_ver(cma_hdr, 4);
2153 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2154 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2155 cma_hdr->port = src4->sin_port;
2161 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
2162 struct ib_cm_event *ib_event)
2164 struct rdma_id_private *id_priv = cm_id->context;
2165 struct rdma_cm_event event;
2166 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
2169 if (cma_disable_remove(id_priv, CMA_CONNECT))
2172 memset(&event, 0, sizeof event);
2173 switch (ib_event->event) {
2174 case IB_CM_SIDR_REQ_ERROR:
2175 event.event = RDMA_CM_EVENT_UNREACHABLE;
2176 event.status = ETIMEDOUT;
2178 case IB_CM_SIDR_REP_RECEIVED:
2179 event.param.ud.private_data = ib_event->private_data;
2180 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
2181 if (rep->status != IB_SIDR_SUCCESS) {
2182 event.event = RDMA_CM_EVENT_UNREACHABLE;
2183 event.status = ib_event->param.sidr_rep_rcvd.status;
2186 if (id_priv->qkey != rep->qkey) {
2187 event.event = RDMA_CM_EVENT_UNREACHABLE;
2188 event.status = EINVAL;
2191 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
2192 id_priv->id.route.path_rec,
2193 &event.param.ud.ah_attr);
2194 event.param.ud.qp_num = rep->qpn;
2195 event.param.ud.qkey = rep->qkey;
2196 event.event = RDMA_CM_EVENT_ESTABLISHED;
2200 log(LOG_ERR, "RDMA CMA: unexpected IB CM event: %d",
2205 ret = id_priv->id.event_handler(&id_priv->id, &event);
2207 /* Destroy the CM ID by returning a non-zero value. */
2208 id_priv->cm_id.ib = NULL;
2209 cma_exch(id_priv, CMA_DESTROYING);
2210 cma_enable_remove(id_priv);
2211 rdma_destroy_id(&id_priv->id);
2215 cma_enable_remove(id_priv);
2219 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
2220 struct rdma_conn_param *conn_param)
2222 struct ib_cm_sidr_req_param req;
2223 struct rdma_route *route;
2226 req.private_data_len = sizeof(struct cma_hdr) +
2227 conn_param->private_data_len;
2228 req.private_data = malloc(req.private_data_len, M_DEVBUF, M_NOWAIT);
2229 if (!req.private_data)
2231 bzero((void *)req.private_data, req.private_data_len);
2233 if (conn_param->private_data && conn_param->private_data_len)
2234 memcpy((caddr_t) req.private_data + sizeof(struct cma_hdr),
2235 conn_param->private_data, conn_param->private_data_len);
2237 route = &id_priv->id.route;
2238 ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route);
2242 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device,
2243 cma_sidr_rep_handler, id_priv);
2244 if (IS_ERR(id_priv->cm_id.ib)) {
2245 ret = PTR_ERR(id_priv->cm_id.ib);
2249 req.path = route->path_rec;
2250 req.service_id = cma_get_service_id(id_priv->id.ps,
2251 &route->addr.dst_addr);
2252 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
2253 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2255 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
2257 ib_destroy_cm_id(id_priv->cm_id.ib);
2258 id_priv->cm_id.ib = NULL;
2261 free(req.private_data, M_DEVBUF);
2265 static int cma_connect_ib(struct rdma_id_private *id_priv,
2266 struct rdma_conn_param *conn_param)
2268 struct ib_cm_req_param req;
2269 struct rdma_route *route;
2273 memset(&req, 0, sizeof req);
2274 offset = cma_user_data_offset(id_priv->id.ps);
2275 req.private_data_len = offset + conn_param->private_data_len;
2276 private_data = malloc(req.private_data_len, M_DEVBUF, M_NOWAIT);
2279 bzero(private_data, req.private_data_len);
2281 if (conn_param->private_data && conn_param->private_data_len)
2282 memcpy(private_data + offset, conn_param->private_data,
2283 conn_param->private_data_len);
2285 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_ib_handler,
2287 if (IS_ERR(id_priv->cm_id.ib)) {
2288 ret = PTR_ERR(id_priv->cm_id.ib);
2292 route = &id_priv->id.route;
2293 ret = cma_format_hdr(private_data, id_priv->id.ps, route);
2296 req.private_data = private_data;
2298 req.primary_path = &route->path_rec[0];
2299 if (route->num_paths == 2)
2300 req.alternate_path = &route->path_rec[1];
2302 req.service_id = cma_get_service_id(id_priv->id.ps,
2303 &route->addr.dst_addr);
2304 req.qp_num = id_priv->qp_num;
2305 req.qp_type = IB_QPT_RC;
2306 req.starting_psn = id_priv->seq_num;
2307 req.responder_resources = conn_param->responder_resources;
2308 req.initiator_depth = conn_param->initiator_depth;
2309 req.flow_control = conn_param->flow_control;
2310 req.retry_count = conn_param->retry_count;
2311 req.rnr_retry_count = conn_param->rnr_retry_count;
2312 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2313 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2314 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2315 req.srq = id_priv->srq ? 1 : 0;
2317 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
2319 if (ret && !IS_ERR(id_priv->cm_id.ib)) {
2320 ib_destroy_cm_id(id_priv->cm_id.ib);
2321 id_priv->cm_id.ib = NULL;
2324 free(private_data, M_DEVBUF);
2329 static int cma_connect_iw(struct rdma_id_private *id_priv,
2330 struct rdma_conn_param *conn_param)
2332 struct iw_cm_id *cm_id;
2333 struct sockaddr_in* sin;
2335 struct iw_cm_conn_param iw_param;
2337 cm_id = iw_create_cm_id(id_priv->id.device, id_priv->so,
2338 cma_iw_handler, id_priv);
2339 if (IS_ERR(cm_id)) {
2340 ret = PTR_ERR(cm_id);
2344 id_priv->cm_id.iw = cm_id;
2346 sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr;
2347 cm_id->local_addr = *sin;
2349 sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr;
2350 cm_id->remote_addr = *sin;
2352 ret = cma_modify_qp_rtr(&id_priv->id);
2356 iw_param.ord = conn_param->initiator_depth;
2357 iw_param.ird = conn_param->responder_resources;
2358 iw_param.private_data = conn_param->private_data;
2359 iw_param.private_data_len = conn_param->private_data_len;
2361 iw_param.qpn = id_priv->qp_num;
2363 iw_param.qpn = conn_param->qp_num;
2364 ret = iw_cm_connect(cm_id, &iw_param);
2366 if (ret && !IS_ERR(cm_id)) {
2367 iw_destroy_cm_id(cm_id);
2368 id_priv->cm_id.iw = NULL;
2373 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2375 struct rdma_id_private *id_priv;
2378 id_priv = container_of(id, struct rdma_id_private, id);
2379 if (!cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_CONNECT))
2383 id_priv->qp_num = conn_param->qp_num;
2384 id_priv->srq = conn_param->srq;
2388 switch (rdma_node_get_transport(id->device->node_type)) {
2389 case RDMA_TRANSPORT_IB:
2390 if (cma_is_ud_ps(id->ps))
2391 ret = cma_resolve_ib_udp(id_priv, conn_param);
2393 ret = cma_connect_ib(id_priv, conn_param);
2395 case RDMA_TRANSPORT_IWARP:
2397 ret = cma_connect_iw(id_priv, conn_param);
2410 cma_comp_exch(id_priv, CMA_CONNECT, CMA_ROUTE_RESOLVED);
2415 static int cma_accept_ib(struct rdma_id_private *id_priv,
2416 struct rdma_conn_param *conn_param)
2418 struct ib_cm_rep_param rep;
2419 struct ib_qp_attr qp_attr;
2420 int qp_attr_mask, ret;
2422 if (id_priv->id.qp) {
2423 ret = cma_modify_qp_rtr(&id_priv->id);
2427 qp_attr.qp_state = IB_QPS_RTS;
2428 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, &qp_attr,
2433 qp_attr.max_rd_atomic = conn_param->initiator_depth;
2434 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
2439 memset(&rep, 0, sizeof rep);
2440 rep.qp_num = id_priv->qp_num;
2441 rep.starting_psn = id_priv->seq_num;
2442 rep.private_data = conn_param->private_data;
2443 rep.private_data_len = conn_param->private_data_len;
2444 rep.responder_resources = conn_param->responder_resources;
2445 rep.initiator_depth = conn_param->initiator_depth;
2446 rep.target_ack_delay = CMA_CM_RESPONSE_TIMEOUT;
2447 rep.failover_accepted = 0;
2448 rep.flow_control = conn_param->flow_control;
2449 rep.rnr_retry_count = conn_param->rnr_retry_count;
2450 rep.srq = id_priv->srq ? 1 : 0;
2452 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
2458 static int cma_accept_iw(struct rdma_id_private *id_priv,
2459 struct rdma_conn_param *conn_param)
2461 struct iw_cm_conn_param iw_param;
2464 ret = cma_modify_qp_rtr(&id_priv->id);
2468 iw_param.ord = conn_param->initiator_depth;
2469 iw_param.ird = conn_param->responder_resources;
2470 iw_param.private_data = conn_param->private_data;
2471 iw_param.private_data_len = conn_param->private_data_len;
2472 if (id_priv->id.qp) {
2473 iw_param.qpn = id_priv->qp_num;
2475 iw_param.qpn = conn_param->qp_num;
2477 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
2481 static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
2482 enum ib_cm_sidr_status status,
2483 const void *private_data, int private_data_len)
2485 struct ib_cm_sidr_rep_param rep;
2487 memset(&rep, 0, sizeof rep);
2488 rep.status = status;
2489 if (status == IB_SIDR_SUCCESS) {
2490 rep.qp_num = id_priv->qp_num;
2491 rep.qkey = id_priv->qkey;
2493 rep.private_data = private_data;
2494 rep.private_data_len = private_data_len;
2496 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
2500 int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2502 struct rdma_id_private *id_priv;
2505 id_priv = container_of(id, struct rdma_id_private, id);
2506 if (!cma_comp(id_priv, CMA_CONNECT))
2509 if (!id->qp && conn_param) {
2510 id_priv->qp_num = conn_param->qp_num;
2511 id_priv->srq = conn_param->srq;
2515 switch (rdma_node_get_transport(id->device->node_type)) {
2516 case RDMA_TRANSPORT_IB:
2517 if (cma_is_ud_ps(id->ps))
2518 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
2519 conn_param->private_data,
2520 conn_param->private_data_len);
2521 else if (conn_param)
2522 ret = cma_accept_ib(id_priv, conn_param);
2524 ret = cma_rep_recv(id_priv);
2526 case RDMA_TRANSPORT_IWARP:
2528 ret = cma_accept_iw(id_priv, conn_param);
2542 cma_modify_qp_err(id);
2543 rdma_reject(id, NULL, 0);
2547 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
2549 struct rdma_id_private *id_priv;
2552 id_priv = container_of(id, struct rdma_id_private, id);
2553 if (!cma_has_cm_dev(id_priv))
2556 switch (id->device->node_type) {
2557 case RDMA_NODE_IB_CA:
2558 ret = ib_cm_notify(id_priv->cm_id.ib, event);
2570 int rdma_reject(struct rdma_cm_id *id, const void *private_data,
2571 u8 private_data_len)
2573 struct rdma_id_private *id_priv;
2576 id_priv = container_of(id, struct rdma_id_private, id);
2577 if (!cma_has_cm_dev(id_priv))
2581 switch (rdma_node_get_transport(id->device->node_type)) {
2582 case RDMA_TRANSPORT_IB:
2583 if (cma_is_ud_ps(id->ps))
2584 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT,
2585 private_data, private_data_len);
2587 ret = ib_send_cm_rej(id_priv->cm_id.ib,
2588 IB_CM_REJ_CONSUMER_DEFINED, NULL,
2589 0, private_data, private_data_len);
2591 case RDMA_TRANSPORT_IWARP:
2593 ret = iw_cm_reject(id_priv->cm_id.iw,
2594 private_data, private_data_len);
2605 int rdma_disconnect(struct rdma_cm_id *id)
2607 struct rdma_id_private *id_priv;
2610 id_priv = container_of(id, struct rdma_id_private, id);
2611 if (!cma_has_cm_dev(id_priv))
2615 switch (rdma_node_get_transport(id->device->node_type)) {
2616 case RDMA_TRANSPORT_IB:
2617 ret = cma_modify_qp_err(id);
2620 /* Initiate or respond to a disconnect. */
2621 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
2622 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
2624 case RDMA_TRANSPORT_IWARP:
2626 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
2639 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
2641 struct rdma_id_private *id_priv;
2642 struct cma_multicast *mc = multicast->context;
2643 struct rdma_cm_event event;
2646 id_priv = mc->id_priv;
2647 if (cma_disable_remove(id_priv, CMA_ADDR_BOUND) &&
2648 cma_disable_remove(id_priv, CMA_ADDR_RESOLVED))
2651 if (!status && id_priv->id.qp)
2652 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
2653 multicast->rec.mlid);
2655 memset(&event, 0, sizeof event);
2656 event.status = status;
2657 event.param.ud.private_data = mc->context;
2659 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
2660 ib_init_ah_from_mcmember(id_priv->id.device,
2661 id_priv->id.port_num, &multicast->rec,
2662 &event.param.ud.ah_attr);
2663 event.param.ud.qp_num = 0xFFFFFF;
2664 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
2666 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
2668 ret = id_priv->id.event_handler(&id_priv->id, &event);
2670 cma_exch(id_priv, CMA_DESTROYING);
2671 cma_enable_remove(id_priv);
2672 rdma_destroy_id(&id_priv->id);
2676 cma_enable_remove(id_priv);
2680 static void cma_set_mgid(struct rdma_id_private *id_priv,
2681 struct sockaddr *addr, union ib_gid *mgid)
2683 unsigned char mc_map[MAX_ADDR_LEN];
2684 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2685 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
2686 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
2688 if (cma_any_addr(addr)) {
2689 memset(mgid, 0, sizeof *mgid);
2690 } else if ((addr->sa_family == AF_INET6) &&
2691 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFF10A01B) ==
2693 /* IPv6 address is an SA assigned MGID. */
2694 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
2696 ip_ib_mc_map(sin->sin_addr.s_addr, mc_map);
2697 if (id_priv->id.ps == RDMA_PS_UDP)
2698 mc_map[7] = 0x01; /* Use RDMA CM signature */
2699 mc_map[8] = ib_addr_get_pkey(dev_addr) >> 8;
2700 mc_map[9] = (unsigned char) ib_addr_get_pkey(dev_addr);
2701 *mgid = *(union ib_gid *) (mc_map + 4);
2705 static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
2706 struct cma_multicast *mc)
2708 struct ib_sa_mcmember_rec rec;
2709 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2710 ib_sa_comp_mask comp_mask;
2713 ib_addr_get_mgid(dev_addr, &rec.mgid);
2714 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
2719 cma_set_mgid(id_priv, &mc->addr, &rec.mgid);
2720 if (id_priv->id.ps == RDMA_PS_UDP)
2721 rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
2722 ib_addr_get_sgid(dev_addr, &rec.port_gid);
2723 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
2726 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
2727 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
2728 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
2729 IB_SA_MCMEMBER_REC_FLOW_LABEL |
2730 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
2732 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
2733 id_priv->id.port_num, &rec,
2734 comp_mask, M_NOWAIT,
2735 cma_ib_mc_handler, mc);
2736 if (IS_ERR(mc->multicast.ib))
2737 return PTR_ERR(mc->multicast.ib);
2742 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
2745 struct rdma_id_private *id_priv;
2746 struct cma_multicast *mc;
2749 id_priv = container_of(id, struct rdma_id_private, id);
2750 if (!cma_comp(id_priv, CMA_ADDR_BOUND) &&
2751 !cma_comp(id_priv, CMA_ADDR_RESOLVED))
2754 mc = malloc(sizeof *mc, M_DEVBUF, M_NOWAIT);
2758 memcpy(&mc->addr, addr, ip_addr_size(addr));
2759 mc->context = context;
2760 mc->id_priv = id_priv;
2762 mtx_lock(&id_priv->lock);
2763 LIST_INSERT_HEAD(&id_priv->mc_list, mc, list);
2764 mtx_unlock(&id_priv->lock);
2766 switch (rdma_node_get_transport(id->device->node_type)) {
2767 case RDMA_TRANSPORT_IB:
2768 ret = cma_join_ib_multicast(id_priv, mc);
2776 mtx_lock(&id_priv->lock);
2777 list_del(&mc->list);
2778 mtx_unlock(&id_priv->lock);
2784 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
2786 struct rdma_id_private *id_priv;
2787 struct cma_multicast *mc;
2789 id_priv = container_of(id, struct rdma_id_private, id);
2790 mtx_lock(&id_priv->lock);
2791 LIST_FOREACH(mc, &id_priv->mc_list, list) {
2792 if (!memcmp(&mc->addr, addr, ip_addr_size(addr))) {
2793 list_del(&mc->list);
2794 mtx_unlock(&id_priv->lock);
2797 ib_detach_mcast(id->qp,
2798 &mc->multicast.ib->rec.mgid,
2799 mc->multicast.ib->rec.mlid);
2800 ib_sa_free_multicast(mc->multicast.ib, M_DEVBUF);
2805 mtx_unlock(&id_priv->lock);
2809 static void cma_add_one(struct ib_device *device)
2811 struct cma_device *cma_dev;
2812 struct rdma_id_private *id_priv;
2814 cma_dev = malloc(sizeof *cma_dev, M_DEVBUF, M_NOWAIT|M_ZERO);
2818 cma_dev->device = device;
2820 cv_init(&cma_dev->comp, "cma_device");
2821 mtx_init(&cma_dev->lock, "cma_device", NULL, MTX_DUPOK|MTX_DEF);
2822 cma_dev->refcount = 1;
2823 LIST_INIT(&cma_dev->id_list);
2824 ib_set_client_data(device, &cma_client, cma_dev);
2827 TAILQ_INSERT_TAIL(&dev_list, cma_dev, list);
2828 LIST_FOREACH(id_priv, &listen_any_list, list)
2829 cma_listen_on_dev(id_priv, cma_dev);
2833 static int cma_remove_id_dev(struct rdma_id_private *id_priv)
2835 struct rdma_cm_event event;
2836 enum cma_state state;
2838 /* Record that we want to remove the device */
2839 state = cma_exch(id_priv, CMA_DEVICE_REMOVAL);
2840 if (state == CMA_DESTROYING)
2843 cma_cancel_operation(id_priv, state);
2844 mtx_lock(&id_priv->lock);
2845 PANIC_IF(id_priv->dev_remove < 0);
2846 if (id_priv->dev_remove)
2847 cv_wait(&id_priv->wait_remove, &id_priv->lock);
2848 mtx_unlock(&id_priv->lock);
2850 /* Check for destruction from another callback. */
2851 if (!cma_comp(id_priv, CMA_DEVICE_REMOVAL))
2854 memset(&event, 0, sizeof event);
2855 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
2856 return id_priv->id.event_handler(&id_priv->id, &event);
2859 static void cma_process_remove(struct cma_device *cma_dev)
2861 struct rdma_id_private *id_priv;
2865 while (!LIST_EMPTY(&cma_dev->id_list)) {
2866 id_priv = LIST_FIRST(&cma_dev->id_list);
2868 if (cma_internal_listen(id_priv)) {
2869 cma_destroy_listen(id_priv);
2873 LIST_REMOVE(id_priv, list);
2874 mtx_lock(&id_priv->lock);
2875 id_priv->refcount++;
2876 mtx_unlock(&id_priv->lock);
2879 ret = cma_remove_id_dev(id_priv);
2880 cma_deref_id(id_priv);
2882 rdma_destroy_id(&id_priv->id);
2888 cma_deref_dev(cma_dev);
2889 mtx_lock(&cma_dev->lock);
2890 PANIC_IF(cma_dev->refcount < 0);
2891 if (cma_dev->refcount)
2892 cv_wait(&cma_dev->comp, &cma_dev->lock);
2893 mtx_unlock(&cma_dev->lock);
2896 static void cma_remove_one(struct ib_device *device)
2898 struct cma_device *cma_dev;
2900 cma_dev = ib_get_client_data(device, &cma_client);
2905 TAILQ_REMOVE(&dev_list, cma_dev, list);
2908 cma_process_remove(cma_dev);
2909 free(cma_dev, M_DEVBUF);
2912 static int cma_init(void)
2916 LIST_INIT(&listen_any_list);
2917 TAILQ_INIT(&dev_list);
2918 mtx_init(&lock, "cma_device list", NULL, MTX_DEF);
2920 arc4rand(&next_port, sizeof next_port, 0);
2921 next_port = ((unsigned int) next_port %
2922 (V_ipport_lastauto - V_ipport_firstauto)) +
2924 cma_wq = taskqueue_create("rdma_cm", M_NOWAIT, taskqueue_thread_enqueue,
2930 taskqueue_start_threads(&cma_wq, 1, PI_NET, "cma_wq thread");
2932 ib_sa_register_client(&sa_client);
2934 rdma_addr_register_client(&addr_client);
2936 ret = ib_register_client(&cma_client);
2942 rdma_addr_unregister_client(&addr_client);
2944 ib_sa_unregister_client(&sa_client);
2946 taskqueue_free(cma_wq);
2950 static void cma_cleanup(void)
2952 ib_unregister_client(&cma_client);
2953 rdma_addr_unregister_client(&addr_client);
2955 ib_sa_unregister_client(&sa_client);
2957 taskqueue_free(cma_wq);
2961 kvl_free(&ipoib_ps);
2965 cma_load(module_t mod, int cmd, void *arg)
2971 printf("Loading rdma_cma.\n");
2977 printf("Unloading rdma_cma.\n");
2990 static moduledata_t mod_data = {
2996 MODULE_VERSION(rdma_cma, 1);
2997 MODULE_DEPEND(rdma_cma, rdma_core, 1, 1, 1);
2998 MODULE_DEPEND(rdma_cma, rdma_addr, 1, 1, 1);
2999 MODULE_DEPEND(rdma_cma, rdma_iwcm, 1, 1, 1);
3000 DECLARE_MODULE(rdma_cma, mod_data, SI_SUB_EXEC, SI_ORDER_ANY);