2 * Copyright (c) 2004 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Voltaire, Inc. All rights reserved.
4 * Copyright (c) 2006 Intel Corporation. All rights reserved.
6 * This software is available to you under a choice of one of two
7 * licenses. You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials
23 * provided with the distribution.
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
35 #include <linux/module.h>
36 #include <linux/init.h>
37 #include <linux/err.h>
38 #include <linux/random.h>
39 #include <linux/spinlock.h>
40 #include <linux/slab.h>
41 #include <linux/dma-mapping.h>
42 #include <linux/kref.h>
43 #include <linux/idr.h>
44 #include <linux/workqueue.h>
46 #include <rdma/ib_pack.h>
47 #include <rdma/ib_cache.h>
50 MODULE_AUTHOR("Roland Dreier");
51 MODULE_DESCRIPTION("InfiniBand subnet administration query support");
52 MODULE_LICENSE("Dual BSD/GPL");
62 struct ib_mad_agent *agent;
63 struct ib_sa_sm_ah *sm_ah;
64 struct work_struct update_task;
70 int start_port, end_port;
71 struct ib_event_handler event_handler;
72 struct ib_sa_port port[0];
76 void (*callback)(struct ib_sa_query *, int, struct ib_sa_mad *);
77 void (*release)(struct ib_sa_query *);
78 struct ib_sa_client *client;
79 struct ib_sa_port *port;
80 struct ib_mad_send_buf *mad_buf;
81 struct ib_sa_sm_ah *sm_ah;
85 struct ib_sa_service_query {
86 void (*callback)(int, struct ib_sa_service_rec *, void *);
88 struct ib_sa_query sa_query;
91 struct ib_sa_path_query {
92 void (*callback)(int, struct ib_sa_path_rec *, void *);
94 struct ib_sa_query sa_query;
97 struct ib_sa_mcmember_query {
98 void (*callback)(int, struct ib_sa_mcmember_rec *, void *);
100 struct ib_sa_query sa_query;
103 static void ib_sa_add_one(struct ib_device *device);
104 static void ib_sa_remove_one(struct ib_device *device);
106 static struct ib_client sa_client = {
108 .add = ib_sa_add_one,
109 .remove = ib_sa_remove_one
112 static DEFINE_SPINLOCK(idr_lock);
113 static DEFINE_IDR(query_idr);
115 static DEFINE_SPINLOCK(tid_lock);
118 #define PATH_REC_FIELD(field) \
119 .struct_offset_bytes = offsetof(struct ib_sa_path_rec, field), \
120 .struct_size_bytes = sizeof ((struct ib_sa_path_rec *) 0)->field, \
121 .field_name = "sa_path_rec:" #field
123 static const struct ib_field path_rec_table[] = {
124 { PATH_REC_FIELD(service_id),
128 { PATH_REC_FIELD(dgid),
132 { PATH_REC_FIELD(sgid),
136 { PATH_REC_FIELD(dlid),
140 { PATH_REC_FIELD(slid),
144 { PATH_REC_FIELD(raw_traffic),
152 { PATH_REC_FIELD(flow_label),
156 { PATH_REC_FIELD(hop_limit),
160 { PATH_REC_FIELD(traffic_class),
164 { PATH_REC_FIELD(reversible),
168 { PATH_REC_FIELD(numb_path),
172 { PATH_REC_FIELD(pkey),
176 { PATH_REC_FIELD(qos_class),
180 { PATH_REC_FIELD(sl),
184 { PATH_REC_FIELD(mtu_selector),
188 { PATH_REC_FIELD(mtu),
192 { PATH_REC_FIELD(rate_selector),
196 { PATH_REC_FIELD(rate),
200 { PATH_REC_FIELD(packet_life_time_selector),
204 { PATH_REC_FIELD(packet_life_time),
208 { PATH_REC_FIELD(preference),
218 #define MCMEMBER_REC_FIELD(field) \
219 .struct_offset_bytes = offsetof(struct ib_sa_mcmember_rec, field), \
220 .struct_size_bytes = sizeof ((struct ib_sa_mcmember_rec *) 0)->field, \
221 .field_name = "sa_mcmember_rec:" #field
223 static const struct ib_field mcmember_rec_table[] = {
224 { MCMEMBER_REC_FIELD(mgid),
228 { MCMEMBER_REC_FIELD(port_gid),
232 { MCMEMBER_REC_FIELD(qkey),
236 { MCMEMBER_REC_FIELD(mlid),
240 { MCMEMBER_REC_FIELD(mtu_selector),
244 { MCMEMBER_REC_FIELD(mtu),
248 { MCMEMBER_REC_FIELD(traffic_class),
252 { MCMEMBER_REC_FIELD(pkey),
256 { MCMEMBER_REC_FIELD(rate_selector),
260 { MCMEMBER_REC_FIELD(rate),
264 { MCMEMBER_REC_FIELD(packet_life_time_selector),
268 { MCMEMBER_REC_FIELD(packet_life_time),
272 { MCMEMBER_REC_FIELD(sl),
276 { MCMEMBER_REC_FIELD(flow_label),
280 { MCMEMBER_REC_FIELD(hop_limit),
284 { MCMEMBER_REC_FIELD(scope),
288 { MCMEMBER_REC_FIELD(join_state),
292 { MCMEMBER_REC_FIELD(proxy_join),
302 #define SERVICE_REC_FIELD(field) \
303 .struct_offset_bytes = offsetof(struct ib_sa_service_rec, field), \
304 .struct_size_bytes = sizeof ((struct ib_sa_service_rec *) 0)->field, \
305 .field_name = "sa_service_rec:" #field
307 static const struct ib_field service_rec_table[] = {
308 { SERVICE_REC_FIELD(id),
312 { SERVICE_REC_FIELD(gid),
316 { SERVICE_REC_FIELD(pkey),
320 { SERVICE_REC_FIELD(lease),
324 { SERVICE_REC_FIELD(key),
328 { SERVICE_REC_FIELD(name),
332 { SERVICE_REC_FIELD(data8),
336 { SERVICE_REC_FIELD(data16),
340 { SERVICE_REC_FIELD(data32),
344 { SERVICE_REC_FIELD(data64),
350 static void free_sm_ah(struct kref *kref)
352 struct ib_sa_sm_ah *sm_ah = container_of(kref, struct ib_sa_sm_ah, ref);
354 ib_destroy_ah(sm_ah->ah);
358 static void update_sm_ah(struct work_struct *work)
360 struct ib_sa_port *port =
361 container_of(work, struct ib_sa_port, update_task);
362 struct ib_sa_sm_ah *new_ah;
363 struct ib_port_attr port_attr;
364 struct ib_ah_attr ah_attr;
366 if (ib_query_port(port->agent->device, port->port_num, &port_attr)) {
367 printk(KERN_WARNING "Couldn't query port\n");
371 new_ah = kmalloc(sizeof *new_ah, GFP_KERNEL);
373 printk(KERN_WARNING "Couldn't allocate new SM AH\n");
377 kref_init(&new_ah->ref);
378 new_ah->src_path_mask = (1 << port_attr.lmc) - 1;
380 new_ah->pkey_index = 0;
381 if (ib_find_pkey(port->agent->device, port->port_num,
382 IB_DEFAULT_PKEY_FULL, &new_ah->pkey_index))
383 printk(KERN_ERR "Couldn't find index for default PKey\n");
385 memset(&ah_attr, 0, sizeof ah_attr);
386 ah_attr.dlid = port_attr.sm_lid;
387 ah_attr.sl = port_attr.sm_sl;
388 ah_attr.port_num = port->port_num;
390 new_ah->ah = ib_create_ah(port->agent->qp->pd, &ah_attr);
391 if (IS_ERR(new_ah->ah)) {
392 printk(KERN_WARNING "Couldn't create new SM AH\n");
397 spin_lock_irq(&port->ah_lock);
399 kref_put(&port->sm_ah->ref, free_sm_ah);
400 port->sm_ah = new_ah;
401 spin_unlock_irq(&port->ah_lock);
405 static void ib_sa_event(struct ib_event_handler *handler, struct ib_event *event)
407 if (event->event == IB_EVENT_PORT_ERR ||
408 event->event == IB_EVENT_PORT_ACTIVE ||
409 event->event == IB_EVENT_LID_CHANGE ||
410 event->event == IB_EVENT_PKEY_CHANGE ||
411 event->event == IB_EVENT_SM_CHANGE ||
412 event->event == IB_EVENT_CLIENT_REREGISTER) {
414 struct ib_sa_device *sa_dev =
415 container_of(handler, typeof(*sa_dev), event_handler);
416 struct ib_sa_port *port =
417 &sa_dev->port[event->element.port_num - sa_dev->start_port];
419 spin_lock_irqsave(&port->ah_lock, flags);
421 kref_put(&port->sm_ah->ref, free_sm_ah);
423 spin_unlock_irqrestore(&port->ah_lock, flags);
425 schedule_work(&sa_dev->port[event->element.port_num -
426 sa_dev->start_port].update_task);
430 void ib_sa_register_client(struct ib_sa_client *client)
432 atomic_set(&client->users, 1);
433 init_completion(&client->comp);
435 EXPORT_SYMBOL(ib_sa_register_client);
437 void ib_sa_unregister_client(struct ib_sa_client *client)
439 ib_sa_client_put(client);
440 wait_for_completion(&client->comp);
442 EXPORT_SYMBOL(ib_sa_unregister_client);
445 * ib_sa_cancel_query - try to cancel an SA query
446 * @id:ID of query to cancel
447 * @query:query pointer to cancel
449 * Try to cancel an SA query. If the id and query don't match up or
450 * the query has already completed, nothing is done. Otherwise the
451 * query is canceled and will complete with a status of -EINTR.
453 void ib_sa_cancel_query(int id, struct ib_sa_query *query)
456 struct ib_mad_agent *agent;
457 struct ib_mad_send_buf *mad_buf;
459 spin_lock_irqsave(&idr_lock, flags);
460 if (idr_find(&query_idr, id) != query) {
461 spin_unlock_irqrestore(&idr_lock, flags);
464 agent = query->port->agent;
465 mad_buf = query->mad_buf;
466 spin_unlock_irqrestore(&idr_lock, flags);
468 ib_cancel_mad(agent, mad_buf);
470 EXPORT_SYMBOL(ib_sa_cancel_query);
472 static u8 get_src_path_mask(struct ib_device *device, u8 port_num)
474 struct ib_sa_device *sa_dev;
475 struct ib_sa_port *port;
479 sa_dev = ib_get_client_data(device, &sa_client);
483 port = &sa_dev->port[port_num - sa_dev->start_port];
484 spin_lock_irqsave(&port->ah_lock, flags);
485 src_path_mask = port->sm_ah ? port->sm_ah->src_path_mask : 0x7f;
486 spin_unlock_irqrestore(&port->ah_lock, flags);
488 return src_path_mask;
491 int ib_init_ah_from_path(struct ib_device *device, u8 port_num,
492 struct ib_sa_path_rec *rec, struct ib_ah_attr *ah_attr)
497 memset(ah_attr, 0, sizeof *ah_attr);
498 ah_attr->dlid = be16_to_cpu(rec->dlid);
499 ah_attr->sl = rec->sl;
500 ah_attr->src_path_bits = be16_to_cpu(rec->slid) &
501 get_src_path_mask(device, port_num);
502 ah_attr->port_num = port_num;
503 ah_attr->static_rate = rec->rate;
505 if (rec->hop_limit > 1) {
506 ah_attr->ah_flags = IB_AH_GRH;
507 ah_attr->grh.dgid = rec->dgid;
509 ret = ib_find_cached_gid(device, &rec->sgid, &port_num,
514 ah_attr->grh.sgid_index = gid_index;
515 ah_attr->grh.flow_label = be32_to_cpu(rec->flow_label);
516 ah_attr->grh.hop_limit = rec->hop_limit;
517 ah_attr->grh.traffic_class = rec->traffic_class;
521 EXPORT_SYMBOL(ib_init_ah_from_path);
523 static int alloc_mad(struct ib_sa_query *query, gfp_t gfp_mask)
527 spin_lock_irqsave(&query->port->ah_lock, flags);
528 if (!query->port->sm_ah) {
529 spin_unlock_irqrestore(&query->port->ah_lock, flags);
532 kref_get(&query->port->sm_ah->ref);
533 query->sm_ah = query->port->sm_ah;
534 spin_unlock_irqrestore(&query->port->ah_lock, flags);
536 query->mad_buf = ib_create_send_mad(query->port->agent, 1,
537 query->sm_ah->pkey_index,
538 0, IB_MGMT_SA_HDR, IB_MGMT_SA_DATA,
540 if (IS_ERR(query->mad_buf)) {
541 kref_put(&query->sm_ah->ref, free_sm_ah);
545 query->mad_buf->ah = query->sm_ah->ah;
550 static void free_mad(struct ib_sa_query *query)
552 ib_free_send_mad(query->mad_buf);
553 kref_put(&query->sm_ah->ref, free_sm_ah);
556 static void init_mad(struct ib_sa_mad *mad, struct ib_mad_agent *agent)
560 memset(mad, 0, sizeof *mad);
562 mad->mad_hdr.base_version = IB_MGMT_BASE_VERSION;
563 mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM;
564 mad->mad_hdr.class_version = IB_SA_CLASS_VERSION;
566 spin_lock_irqsave(&tid_lock, flags);
568 cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++);
569 spin_unlock_irqrestore(&tid_lock, flags);
572 static int send_mad(struct ib_sa_query *query, int timeout_ms, gfp_t gfp_mask)
578 if (!idr_pre_get(&query_idr, gfp_mask))
580 spin_lock_irqsave(&idr_lock, flags);
581 ret = idr_get_new(&query_idr, query, &id);
582 spin_unlock_irqrestore(&idr_lock, flags);
588 query->mad_buf->timeout_ms = timeout_ms;
589 query->mad_buf->context[0] = query;
592 ret = ib_post_send_mad(query->mad_buf, NULL);
594 spin_lock_irqsave(&idr_lock, flags);
595 idr_remove(&query_idr, id);
596 spin_unlock_irqrestore(&idr_lock, flags);
600 * It's not safe to dereference query any more, because the
601 * send may already have completed and freed the query in
604 return ret ? ret : id;
607 void ib_sa_unpack_path(void *attribute, struct ib_sa_path_rec *rec)
609 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), attribute, rec);
611 EXPORT_SYMBOL(ib_sa_unpack_path);
613 static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query,
615 struct ib_sa_mad *mad)
617 struct ib_sa_path_query *query =
618 container_of(sa_query, struct ib_sa_path_query, sa_query);
621 struct ib_sa_path_rec rec;
623 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table),
625 query->callback(status, &rec, query->context);
627 query->callback(status, NULL, query->context);
630 static void ib_sa_path_rec_release(struct ib_sa_query *sa_query)
632 kfree(container_of(sa_query, struct ib_sa_path_query, sa_query));
636 * ib_sa_path_rec_get - Start a Path get query
638 * @device:device to send query on
639 * @port_num: port number to send query on
640 * @rec:Path Record to send in query
641 * @comp_mask:component mask to send in query
642 * @timeout_ms:time to wait for response
643 * @gfp_mask:GFP mask to use for internal allocations
644 * @callback:function called when query completes, times out or is
646 * @context:opaque user context passed to callback
647 * @sa_query:query context, used to cancel query
649 * Send a Path Record Get query to the SA to look up a path. The
650 * callback function will be called when the query completes (or
651 * fails); status is 0 for a successful response, -EINTR if the query
652 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
653 * occurred sending the query. The resp parameter of the callback is
654 * only valid if status is 0.
656 * If the return value of ib_sa_path_rec_get() is negative, it is an
657 * error code. Otherwise it is a query ID that can be used to cancel
660 int ib_sa_path_rec_get(struct ib_sa_client *client,
661 struct ib_device *device, u8 port_num,
662 struct ib_sa_path_rec *rec,
663 ib_sa_comp_mask comp_mask,
664 int timeout_ms, gfp_t gfp_mask,
665 void (*callback)(int status,
666 struct ib_sa_path_rec *resp,
669 struct ib_sa_query **sa_query)
671 struct ib_sa_path_query *query;
672 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
673 struct ib_sa_port *port;
674 struct ib_mad_agent *agent;
675 struct ib_sa_mad *mad;
681 port = &sa_dev->port[port_num - sa_dev->start_port];
684 query = kmalloc(sizeof *query, gfp_mask);
688 query->sa_query.port = port;
689 ret = alloc_mad(&query->sa_query, gfp_mask);
693 ib_sa_client_get(client);
694 query->sa_query.client = client;
695 query->callback = callback;
696 query->context = context;
698 mad = query->sa_query.mad_buf->mad;
699 init_mad(mad, agent);
701 query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL;
702 query->sa_query.release = ib_sa_path_rec_release;
703 mad->mad_hdr.method = IB_MGMT_METHOD_GET;
704 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC);
705 mad->sa_hdr.comp_mask = comp_mask;
707 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, mad->data);
709 *sa_query = &query->sa_query;
711 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
719 ib_sa_client_put(query->sa_query.client);
720 free_mad(&query->sa_query);
726 EXPORT_SYMBOL(ib_sa_path_rec_get);
728 static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query,
730 struct ib_sa_mad *mad)
732 struct ib_sa_service_query *query =
733 container_of(sa_query, struct ib_sa_service_query, sa_query);
736 struct ib_sa_service_rec rec;
738 ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table),
740 query->callback(status, &rec, query->context);
742 query->callback(status, NULL, query->context);
745 static void ib_sa_service_rec_release(struct ib_sa_query *sa_query)
747 kfree(container_of(sa_query, struct ib_sa_service_query, sa_query));
751 * ib_sa_service_rec_query - Start Service Record operation
753 * @device:device to send request on
754 * @port_num: port number to send request on
755 * @method:SA method - should be get, set, or delete
756 * @rec:Service Record to send in request
757 * @comp_mask:component mask to send in request
758 * @timeout_ms:time to wait for response
759 * @gfp_mask:GFP mask to use for internal allocations
760 * @callback:function called when request completes, times out or is
762 * @context:opaque user context passed to callback
763 * @sa_query:request context, used to cancel request
765 * Send a Service Record set/get/delete to the SA to register,
766 * unregister or query a service record.
767 * The callback function will be called when the request completes (or
768 * fails); status is 0 for a successful response, -EINTR if the query
769 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
770 * occurred sending the query. The resp parameter of the callback is
771 * only valid if status is 0.
773 * If the return value of ib_sa_service_rec_query() is negative, it is an
774 * error code. Otherwise it is a request ID that can be used to cancel
777 int ib_sa_service_rec_query(struct ib_sa_client *client,
778 struct ib_device *device, u8 port_num, u8 method,
779 struct ib_sa_service_rec *rec,
780 ib_sa_comp_mask comp_mask,
781 int timeout_ms, gfp_t gfp_mask,
782 void (*callback)(int status,
783 struct ib_sa_service_rec *resp,
786 struct ib_sa_query **sa_query)
788 struct ib_sa_service_query *query;
789 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
790 struct ib_sa_port *port;
791 struct ib_mad_agent *agent;
792 struct ib_sa_mad *mad;
798 port = &sa_dev->port[port_num - sa_dev->start_port];
801 if (method != IB_MGMT_METHOD_GET &&
802 method != IB_MGMT_METHOD_SET &&
803 method != IB_SA_METHOD_DELETE)
806 query = kmalloc(sizeof *query, gfp_mask);
810 query->sa_query.port = port;
811 ret = alloc_mad(&query->sa_query, gfp_mask);
815 ib_sa_client_get(client);
816 query->sa_query.client = client;
817 query->callback = callback;
818 query->context = context;
820 mad = query->sa_query.mad_buf->mad;
821 init_mad(mad, agent);
823 query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL;
824 query->sa_query.release = ib_sa_service_rec_release;
825 mad->mad_hdr.method = method;
826 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_SERVICE_REC);
827 mad->sa_hdr.comp_mask = comp_mask;
829 ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table),
832 *sa_query = &query->sa_query;
834 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
842 ib_sa_client_put(query->sa_query.client);
843 free_mad(&query->sa_query);
849 EXPORT_SYMBOL(ib_sa_service_rec_query);
851 static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query,
853 struct ib_sa_mad *mad)
855 struct ib_sa_mcmember_query *query =
856 container_of(sa_query, struct ib_sa_mcmember_query, sa_query);
859 struct ib_sa_mcmember_rec rec;
861 ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
863 query->callback(status, &rec, query->context);
865 query->callback(status, NULL, query->context);
868 static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query)
870 kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query));
873 int ib_sa_mcmember_rec_query(struct ib_sa_client *client,
874 struct ib_device *device, u8 port_num,
876 struct ib_sa_mcmember_rec *rec,
877 ib_sa_comp_mask comp_mask,
878 int timeout_ms, gfp_t gfp_mask,
879 void (*callback)(int status,
880 struct ib_sa_mcmember_rec *resp,
883 struct ib_sa_query **sa_query)
885 struct ib_sa_mcmember_query *query;
886 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
887 struct ib_sa_port *port;
888 struct ib_mad_agent *agent;
889 struct ib_sa_mad *mad;
895 port = &sa_dev->port[port_num - sa_dev->start_port];
898 query = kmalloc(sizeof *query, gfp_mask);
902 query->sa_query.port = port;
903 ret = alloc_mad(&query->sa_query, gfp_mask);
907 ib_sa_client_get(client);
908 query->sa_query.client = client;
909 query->callback = callback;
910 query->context = context;
912 mad = query->sa_query.mad_buf->mad;
913 init_mad(mad, agent);
915 query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL;
916 query->sa_query.release = ib_sa_mcmember_rec_release;
917 mad->mad_hdr.method = method;
918 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC);
919 mad->sa_hdr.comp_mask = comp_mask;
921 ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
924 *sa_query = &query->sa_query;
926 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
934 ib_sa_client_put(query->sa_query.client);
935 free_mad(&query->sa_query);
942 static void send_handler(struct ib_mad_agent *agent,
943 struct ib_mad_send_wc *mad_send_wc)
945 struct ib_sa_query *query = mad_send_wc->send_buf->context[0];
949 switch (mad_send_wc->status) {
951 /* No callback -- already got recv */
953 case IB_WC_RESP_TIMEOUT_ERR:
954 query->callback(query, -ETIMEDOUT, NULL);
956 case IB_WC_WR_FLUSH_ERR:
957 query->callback(query, -EINTR, NULL);
960 query->callback(query, -EIO, NULL);
964 spin_lock_irqsave(&idr_lock, flags);
965 idr_remove(&query_idr, query->id);
966 spin_unlock_irqrestore(&idr_lock, flags);
969 ib_sa_client_put(query->client);
970 query->release(query);
973 static void recv_handler(struct ib_mad_agent *mad_agent,
974 struct ib_mad_recv_wc *mad_recv_wc)
976 struct ib_sa_query *query;
977 struct ib_mad_send_buf *mad_buf;
979 mad_buf = (void *) (unsigned long) mad_recv_wc->wc->wr_id;
980 query = mad_buf->context[0];
982 if (query->callback) {
983 if (mad_recv_wc->wc->status == IB_WC_SUCCESS)
984 query->callback(query,
985 mad_recv_wc->recv_buf.mad->mad_hdr.status ?
987 (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad);
989 query->callback(query, -EIO, NULL);
992 ib_free_recv_mad(mad_recv_wc);
995 static void ib_sa_add_one(struct ib_device *device)
997 struct ib_sa_device *sa_dev;
1000 if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB)
1003 if (device->node_type == RDMA_NODE_IB_SWITCH)
1007 e = device->phys_port_cnt;
1010 sa_dev = kmalloc(sizeof *sa_dev +
1011 (e - s + 1) * sizeof (struct ib_sa_port),
1016 sa_dev->start_port = s;
1017 sa_dev->end_port = e;
1019 for (i = 0; i <= e - s; ++i) {
1020 sa_dev->port[i].sm_ah = NULL;
1021 sa_dev->port[i].port_num = i + s;
1022 spin_lock_init(&sa_dev->port[i].ah_lock);
1024 sa_dev->port[i].agent =
1025 ib_register_mad_agent(device, i + s, IB_QPT_GSI,
1026 NULL, 0, send_handler,
1027 recv_handler, sa_dev);
1028 if (IS_ERR(sa_dev->port[i].agent))
1031 INIT_WORK(&sa_dev->port[i].update_task, update_sm_ah);
1034 ib_set_client_data(device, &sa_client, sa_dev);
1037 * We register our event handler after everything is set up,
1038 * and then update our cached info after the event handler is
1039 * registered to avoid any problems if a port changes state
1040 * during our initialization.
1043 INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event);
1044 if (ib_register_event_handler(&sa_dev->event_handler))
1047 for (i = 0; i <= e - s; ++i)
1048 update_sm_ah(&sa_dev->port[i].update_task);
1054 ib_unregister_mad_agent(sa_dev->port[i].agent);
1061 static void ib_sa_remove_one(struct ib_device *device)
1063 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1069 ib_unregister_event_handler(&sa_dev->event_handler);
1071 flush_scheduled_work();
1073 for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) {
1074 ib_unregister_mad_agent(sa_dev->port[i].agent);
1075 if (sa_dev->port[i].sm_ah)
1076 kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah);
1082 static int __init ib_sa_init(void)
1086 get_random_bytes(&tid, sizeof tid);
1088 ret = ib_register_client(&sa_client);
1090 printk(KERN_ERR "Couldn't register ib_sa client\n");
1096 printk(KERN_ERR "Couldn't initialize multicast handling\n");
1102 ib_unregister_client(&sa_client);
1107 static void __exit ib_sa_cleanup(void)
1110 ib_unregister_client(&sa_client);
1111 idr_destroy(&query_idr);
1114 module_init(ib_sa_init);
1115 module_exit(ib_sa_cleanup);