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
34 * $Id: sa_query.c 2811 2005-07-06 18:11:43Z halr $
37 #include <linux/module.h>
38 #include <linux/init.h>
39 #include <linux/err.h>
40 #include <linux/random.h>
41 #include <linux/spinlock.h>
42 #include <linux/slab.h>
43 #include <linux/pci.h>
44 #include <linux/dma-mapping.h>
45 #include <linux/kref.h>
46 #include <linux/idr.h>
47 #include <linux/workqueue.h>
49 #include <rdma/ib_pack.h>
50 #include <rdma/ib_cache.h>
53 MODULE_AUTHOR("Roland Dreier");
54 MODULE_DESCRIPTION("InfiniBand subnet administration query support");
55 MODULE_LICENSE("Dual BSD/GPL");
63 struct ib_mad_agent *agent;
64 struct ib_sa_sm_ah *sm_ah;
65 struct work_struct update_task;
71 int start_port, end_port;
72 struct ib_event_handler event_handler;
73 struct ib_sa_port port[0];
77 void (*callback)(struct ib_sa_query *, int, struct ib_sa_mad *);
78 void (*release)(struct ib_sa_query *);
79 struct ib_sa_client *client;
80 struct ib_sa_port *port;
81 struct ib_mad_send_buf *mad_buf;
82 struct ib_sa_sm_ah *sm_ah;
86 struct ib_sa_service_query {
87 void (*callback)(int, struct ib_sa_service_rec *, void *);
89 struct ib_sa_query sa_query;
92 struct ib_sa_path_query {
93 void (*callback)(int, struct ib_sa_path_rec *, void *);
95 struct ib_sa_query sa_query;
98 struct ib_sa_mcmember_query {
99 void (*callback)(int, struct ib_sa_mcmember_rec *, void *);
101 struct ib_sa_query sa_query;
104 static void ib_sa_add_one(struct ib_device *device);
105 static void ib_sa_remove_one(struct ib_device *device);
107 static struct ib_client sa_client = {
109 .add = ib_sa_add_one,
110 .remove = ib_sa_remove_one
113 static spinlock_t idr_lock;
114 static DEFINE_IDR(query_idr);
116 static spinlock_t tid_lock;
119 #define PATH_REC_FIELD(field) \
120 .struct_offset_bytes = offsetof(struct ib_sa_path_rec, field), \
121 .struct_size_bytes = sizeof ((struct ib_sa_path_rec *) 0)->field, \
122 .field_name = "sa_path_rec:" #field
124 static const struct ib_field path_rec_table[] = {
133 { PATH_REC_FIELD(dgid),
137 { PATH_REC_FIELD(sgid),
141 { PATH_REC_FIELD(dlid),
145 { PATH_REC_FIELD(slid),
149 { PATH_REC_FIELD(raw_traffic),
157 { PATH_REC_FIELD(flow_label),
161 { PATH_REC_FIELD(hop_limit),
165 { PATH_REC_FIELD(traffic_class),
169 { PATH_REC_FIELD(reversible),
173 { PATH_REC_FIELD(numb_path),
177 { PATH_REC_FIELD(pkey),
185 { PATH_REC_FIELD(sl),
189 { PATH_REC_FIELD(mtu_selector),
193 { PATH_REC_FIELD(mtu),
197 { PATH_REC_FIELD(rate_selector),
201 { PATH_REC_FIELD(rate),
205 { PATH_REC_FIELD(packet_life_time_selector),
209 { PATH_REC_FIELD(packet_life_time),
213 { PATH_REC_FIELD(preference),
223 #define MCMEMBER_REC_FIELD(field) \
224 .struct_offset_bytes = offsetof(struct ib_sa_mcmember_rec, field), \
225 .struct_size_bytes = sizeof ((struct ib_sa_mcmember_rec *) 0)->field, \
226 .field_name = "sa_mcmember_rec:" #field
228 static const struct ib_field mcmember_rec_table[] = {
229 { MCMEMBER_REC_FIELD(mgid),
233 { MCMEMBER_REC_FIELD(port_gid),
237 { MCMEMBER_REC_FIELD(qkey),
241 { MCMEMBER_REC_FIELD(mlid),
245 { MCMEMBER_REC_FIELD(mtu_selector),
249 { MCMEMBER_REC_FIELD(mtu),
253 { MCMEMBER_REC_FIELD(traffic_class),
257 { MCMEMBER_REC_FIELD(pkey),
261 { MCMEMBER_REC_FIELD(rate_selector),
265 { MCMEMBER_REC_FIELD(rate),
269 { MCMEMBER_REC_FIELD(packet_life_time_selector),
273 { MCMEMBER_REC_FIELD(packet_life_time),
277 { MCMEMBER_REC_FIELD(sl),
281 { MCMEMBER_REC_FIELD(flow_label),
285 { MCMEMBER_REC_FIELD(hop_limit),
289 { MCMEMBER_REC_FIELD(scope),
293 { MCMEMBER_REC_FIELD(join_state),
297 { MCMEMBER_REC_FIELD(proxy_join),
307 #define SERVICE_REC_FIELD(field) \
308 .struct_offset_bytes = offsetof(struct ib_sa_service_rec, field), \
309 .struct_size_bytes = sizeof ((struct ib_sa_service_rec *) 0)->field, \
310 .field_name = "sa_service_rec:" #field
312 static const struct ib_field service_rec_table[] = {
313 { SERVICE_REC_FIELD(id),
317 { SERVICE_REC_FIELD(gid),
321 { SERVICE_REC_FIELD(pkey),
325 { SERVICE_REC_FIELD(lease),
329 { SERVICE_REC_FIELD(key),
333 { SERVICE_REC_FIELD(name),
337 { SERVICE_REC_FIELD(data8),
341 { SERVICE_REC_FIELD(data16),
345 { SERVICE_REC_FIELD(data32),
349 { SERVICE_REC_FIELD(data64),
355 static void free_sm_ah(struct kref *kref)
357 struct ib_sa_sm_ah *sm_ah = container_of(kref, struct ib_sa_sm_ah, ref);
359 ib_destroy_ah(sm_ah->ah);
363 static void update_sm_ah(struct work_struct *work)
365 struct ib_sa_port *port =
366 container_of(work, struct ib_sa_port, update_task);
367 struct ib_sa_sm_ah *new_ah, *old_ah;
368 struct ib_port_attr port_attr;
369 struct ib_ah_attr ah_attr;
371 if (ib_query_port(port->agent->device, port->port_num, &port_attr)) {
372 printk(KERN_WARNING "Couldn't query port\n");
376 new_ah = kmalloc(sizeof *new_ah, GFP_KERNEL);
378 printk(KERN_WARNING "Couldn't allocate new SM AH\n");
382 kref_init(&new_ah->ref);
384 memset(&ah_attr, 0, sizeof ah_attr);
385 ah_attr.dlid = port_attr.sm_lid;
386 ah_attr.sl = port_attr.sm_sl;
387 ah_attr.port_num = port->port_num;
389 new_ah->ah = ib_create_ah(port->agent->qp->pd, &ah_attr);
390 if (IS_ERR(new_ah->ah)) {
391 printk(KERN_WARNING "Couldn't create new SM AH\n");
396 spin_lock_irq(&port->ah_lock);
397 old_ah = port->sm_ah;
398 port->sm_ah = new_ah;
399 spin_unlock_irq(&port->ah_lock);
402 kref_put(&old_ah->ref, free_sm_ah);
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) {
413 struct ib_sa_device *sa_dev;
414 sa_dev = container_of(handler, typeof(*sa_dev), event_handler);
416 schedule_work(&sa_dev->port[event->element.port_num -
417 sa_dev->start_port].update_task);
421 void ib_sa_register_client(struct ib_sa_client *client)
423 atomic_set(&client->users, 1);
424 init_completion(&client->comp);
426 EXPORT_SYMBOL(ib_sa_register_client);
428 void ib_sa_unregister_client(struct ib_sa_client *client)
430 ib_sa_client_put(client);
431 wait_for_completion(&client->comp);
433 EXPORT_SYMBOL(ib_sa_unregister_client);
436 * ib_sa_cancel_query - try to cancel an SA query
437 * @id:ID of query to cancel
438 * @query:query pointer to cancel
440 * Try to cancel an SA query. If the id and query don't match up or
441 * the query has already completed, nothing is done. Otherwise the
442 * query is canceled and will complete with a status of -EINTR.
444 void ib_sa_cancel_query(int id, struct ib_sa_query *query)
447 struct ib_mad_agent *agent;
448 struct ib_mad_send_buf *mad_buf;
450 spin_lock_irqsave(&idr_lock, flags);
451 if (idr_find(&query_idr, id) != query) {
452 spin_unlock_irqrestore(&idr_lock, flags);
455 agent = query->port->agent;
456 mad_buf = query->mad_buf;
457 spin_unlock_irqrestore(&idr_lock, flags);
459 ib_cancel_mad(agent, mad_buf);
461 EXPORT_SYMBOL(ib_sa_cancel_query);
463 int ib_init_ah_from_path(struct ib_device *device, u8 port_num,
464 struct ib_sa_path_rec *rec, struct ib_ah_attr *ah_attr)
469 memset(ah_attr, 0, sizeof *ah_attr);
470 ah_attr->dlid = be16_to_cpu(rec->dlid);
471 ah_attr->sl = rec->sl;
472 ah_attr->src_path_bits = be16_to_cpu(rec->slid) & 0x7f;
473 ah_attr->port_num = port_num;
475 if (rec->hop_limit > 1) {
476 ah_attr->ah_flags = IB_AH_GRH;
477 ah_attr->grh.dgid = rec->dgid;
479 ret = ib_find_cached_gid(device, &rec->sgid, &port_num,
484 ah_attr->grh.sgid_index = gid_index;
485 ah_attr->grh.flow_label = be32_to_cpu(rec->flow_label);
486 ah_attr->grh.hop_limit = rec->hop_limit;
487 ah_attr->grh.traffic_class = rec->traffic_class;
491 EXPORT_SYMBOL(ib_init_ah_from_path);
493 static void init_mad(struct ib_sa_mad *mad, struct ib_mad_agent *agent)
497 memset(mad, 0, sizeof *mad);
499 mad->mad_hdr.base_version = IB_MGMT_BASE_VERSION;
500 mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM;
501 mad->mad_hdr.class_version = IB_SA_CLASS_VERSION;
503 spin_lock_irqsave(&tid_lock, flags);
505 cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++);
506 spin_unlock_irqrestore(&tid_lock, flags);
509 static int send_mad(struct ib_sa_query *query, int timeout_ms, gfp_t gfp_mask)
515 if (!idr_pre_get(&query_idr, gfp_mask))
517 spin_lock_irqsave(&idr_lock, flags);
518 ret = idr_get_new(&query_idr, query, &id);
519 spin_unlock_irqrestore(&idr_lock, flags);
525 query->mad_buf->timeout_ms = timeout_ms;
526 query->mad_buf->context[0] = query;
529 spin_lock_irqsave(&query->port->ah_lock, flags);
530 kref_get(&query->port->sm_ah->ref);
531 query->sm_ah = query->port->sm_ah;
532 spin_unlock_irqrestore(&query->port->ah_lock, flags);
534 query->mad_buf->ah = query->sm_ah->ah;
536 ret = ib_post_send_mad(query->mad_buf, NULL);
538 spin_lock_irqsave(&idr_lock, flags);
539 idr_remove(&query_idr, id);
540 spin_unlock_irqrestore(&idr_lock, flags);
542 kref_put(&query->sm_ah->ref, free_sm_ah);
546 * It's not safe to dereference query any more, because the
547 * send may already have completed and freed the query in
550 return ret ? ret : id;
553 static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query,
555 struct ib_sa_mad *mad)
557 struct ib_sa_path_query *query =
558 container_of(sa_query, struct ib_sa_path_query, sa_query);
561 struct ib_sa_path_rec rec;
563 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table),
565 query->callback(status, &rec, query->context);
567 query->callback(status, NULL, query->context);
570 static void ib_sa_path_rec_release(struct ib_sa_query *sa_query)
572 kfree(container_of(sa_query, struct ib_sa_path_query, sa_query));
576 * ib_sa_path_rec_get - Start a Path get query
578 * @device:device to send query on
579 * @port_num: port number to send query on
580 * @rec:Path Record to send in query
581 * @comp_mask:component mask to send in query
582 * @timeout_ms:time to wait for response
583 * @gfp_mask:GFP mask to use for internal allocations
584 * @callback:function called when query completes, times out or is
586 * @context:opaque user context passed to callback
587 * @sa_query:query context, used to cancel query
589 * Send a Path Record Get query to the SA to look up a path. The
590 * callback function will be called when the query completes (or
591 * fails); status is 0 for a successful response, -EINTR if the query
592 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
593 * occurred sending the query. The resp parameter of the callback is
594 * only valid if status is 0.
596 * If the return value of ib_sa_path_rec_get() is negative, it is an
597 * error code. Otherwise it is a query ID that can be used to cancel
600 int ib_sa_path_rec_get(struct ib_sa_client *client,
601 struct ib_device *device, u8 port_num,
602 struct ib_sa_path_rec *rec,
603 ib_sa_comp_mask comp_mask,
604 int timeout_ms, gfp_t gfp_mask,
605 void (*callback)(int status,
606 struct ib_sa_path_rec *resp,
609 struct ib_sa_query **sa_query)
611 struct ib_sa_path_query *query;
612 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
613 struct ib_sa_port *port;
614 struct ib_mad_agent *agent;
615 struct ib_sa_mad *mad;
621 port = &sa_dev->port[port_num - sa_dev->start_port];
624 query = kmalloc(sizeof *query, gfp_mask);
628 query->sa_query.mad_buf = ib_create_send_mad(agent, 1, 0,
630 IB_MGMT_SA_DATA, gfp_mask);
631 if (!query->sa_query.mad_buf) {
636 ib_sa_client_get(client);
637 query->sa_query.client = client;
638 query->callback = callback;
639 query->context = context;
641 mad = query->sa_query.mad_buf->mad;
642 init_mad(mad, agent);
644 query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL;
645 query->sa_query.release = ib_sa_path_rec_release;
646 query->sa_query.port = port;
647 mad->mad_hdr.method = IB_MGMT_METHOD_GET;
648 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC);
649 mad->sa_hdr.comp_mask = comp_mask;
651 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, mad->data);
653 *sa_query = &query->sa_query;
655 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
663 ib_sa_client_put(query->sa_query.client);
664 ib_free_send_mad(query->sa_query.mad_buf);
670 EXPORT_SYMBOL(ib_sa_path_rec_get);
672 static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query,
674 struct ib_sa_mad *mad)
676 struct ib_sa_service_query *query =
677 container_of(sa_query, struct ib_sa_service_query, sa_query);
680 struct ib_sa_service_rec rec;
682 ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table),
684 query->callback(status, &rec, query->context);
686 query->callback(status, NULL, query->context);
689 static void ib_sa_service_rec_release(struct ib_sa_query *sa_query)
691 kfree(container_of(sa_query, struct ib_sa_service_query, sa_query));
695 * ib_sa_service_rec_query - Start Service Record operation
697 * @device:device to send request on
698 * @port_num: port number to send request on
699 * @method:SA method - should be get, set, or delete
700 * @rec:Service Record to send in request
701 * @comp_mask:component mask to send in request
702 * @timeout_ms:time to wait for response
703 * @gfp_mask:GFP mask to use for internal allocations
704 * @callback:function called when request completes, times out or is
706 * @context:opaque user context passed to callback
707 * @sa_query:request context, used to cancel request
709 * Send a Service Record set/get/delete to the SA to register,
710 * unregister or query a service record.
711 * The callback function will be called when the request completes (or
712 * fails); status is 0 for a successful response, -EINTR if the query
713 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
714 * occurred sending the query. The resp parameter of the callback is
715 * only valid if status is 0.
717 * If the return value of ib_sa_service_rec_query() is negative, it is an
718 * error code. Otherwise it is a request ID that can be used to cancel
721 int ib_sa_service_rec_query(struct ib_sa_client *client,
722 struct ib_device *device, u8 port_num, u8 method,
723 struct ib_sa_service_rec *rec,
724 ib_sa_comp_mask comp_mask,
725 int timeout_ms, gfp_t gfp_mask,
726 void (*callback)(int status,
727 struct ib_sa_service_rec *resp,
730 struct ib_sa_query **sa_query)
732 struct ib_sa_service_query *query;
733 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
734 struct ib_sa_port *port;
735 struct ib_mad_agent *agent;
736 struct ib_sa_mad *mad;
742 port = &sa_dev->port[port_num - sa_dev->start_port];
745 if (method != IB_MGMT_METHOD_GET &&
746 method != IB_MGMT_METHOD_SET &&
747 method != IB_SA_METHOD_DELETE)
750 query = kmalloc(sizeof *query, gfp_mask);
754 query->sa_query.mad_buf = ib_create_send_mad(agent, 1, 0,
756 IB_MGMT_SA_DATA, gfp_mask);
757 if (!query->sa_query.mad_buf) {
762 ib_sa_client_get(client);
763 query->sa_query.client = client;
764 query->callback = callback;
765 query->context = context;
767 mad = query->sa_query.mad_buf->mad;
768 init_mad(mad, agent);
770 query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL;
771 query->sa_query.release = ib_sa_service_rec_release;
772 query->sa_query.port = port;
773 mad->mad_hdr.method = method;
774 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_SERVICE_REC);
775 mad->sa_hdr.comp_mask = comp_mask;
777 ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table),
780 *sa_query = &query->sa_query;
782 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
790 ib_sa_client_put(query->sa_query.client);
791 ib_free_send_mad(query->sa_query.mad_buf);
797 EXPORT_SYMBOL(ib_sa_service_rec_query);
799 static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query,
801 struct ib_sa_mad *mad)
803 struct ib_sa_mcmember_query *query =
804 container_of(sa_query, struct ib_sa_mcmember_query, sa_query);
807 struct ib_sa_mcmember_rec rec;
809 ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
811 query->callback(status, &rec, query->context);
813 query->callback(status, NULL, query->context);
816 static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query)
818 kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query));
821 int ib_sa_mcmember_rec_query(struct ib_sa_client *client,
822 struct ib_device *device, u8 port_num,
824 struct ib_sa_mcmember_rec *rec,
825 ib_sa_comp_mask comp_mask,
826 int timeout_ms, gfp_t gfp_mask,
827 void (*callback)(int status,
828 struct ib_sa_mcmember_rec *resp,
831 struct ib_sa_query **sa_query)
833 struct ib_sa_mcmember_query *query;
834 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
835 struct ib_sa_port *port;
836 struct ib_mad_agent *agent;
837 struct ib_sa_mad *mad;
843 port = &sa_dev->port[port_num - sa_dev->start_port];
846 query = kmalloc(sizeof *query, gfp_mask);
850 query->sa_query.mad_buf = ib_create_send_mad(agent, 1, 0,
852 IB_MGMT_SA_DATA, gfp_mask);
853 if (!query->sa_query.mad_buf) {
858 ib_sa_client_get(client);
859 query->sa_query.client = client;
860 query->callback = callback;
861 query->context = context;
863 mad = query->sa_query.mad_buf->mad;
864 init_mad(mad, agent);
866 query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL;
867 query->sa_query.release = ib_sa_mcmember_rec_release;
868 query->sa_query.port = port;
869 mad->mad_hdr.method = method;
870 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC);
871 mad->sa_hdr.comp_mask = comp_mask;
873 ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
876 *sa_query = &query->sa_query;
878 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
886 ib_sa_client_put(query->sa_query.client);
887 ib_free_send_mad(query->sa_query.mad_buf);
894 static void send_handler(struct ib_mad_agent *agent,
895 struct ib_mad_send_wc *mad_send_wc)
897 struct ib_sa_query *query = mad_send_wc->send_buf->context[0];
901 switch (mad_send_wc->status) {
903 /* No callback -- already got recv */
905 case IB_WC_RESP_TIMEOUT_ERR:
906 query->callback(query, -ETIMEDOUT, NULL);
908 case IB_WC_WR_FLUSH_ERR:
909 query->callback(query, -EINTR, NULL);
912 query->callback(query, -EIO, NULL);
916 spin_lock_irqsave(&idr_lock, flags);
917 idr_remove(&query_idr, query->id);
918 spin_unlock_irqrestore(&idr_lock, flags);
920 ib_free_send_mad(mad_send_wc->send_buf);
921 kref_put(&query->sm_ah->ref, free_sm_ah);
922 ib_sa_client_put(query->client);
923 query->release(query);
926 static void recv_handler(struct ib_mad_agent *mad_agent,
927 struct ib_mad_recv_wc *mad_recv_wc)
929 struct ib_sa_query *query;
930 struct ib_mad_send_buf *mad_buf;
932 mad_buf = (void *) (unsigned long) mad_recv_wc->wc->wr_id;
933 query = mad_buf->context[0];
935 if (query->callback) {
936 if (mad_recv_wc->wc->status == IB_WC_SUCCESS)
937 query->callback(query,
938 mad_recv_wc->recv_buf.mad->mad_hdr.status ?
940 (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad);
942 query->callback(query, -EIO, NULL);
945 ib_free_recv_mad(mad_recv_wc);
948 static void ib_sa_add_one(struct ib_device *device)
950 struct ib_sa_device *sa_dev;
953 if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB)
956 if (device->node_type == RDMA_NODE_IB_SWITCH)
960 e = device->phys_port_cnt;
963 sa_dev = kmalloc(sizeof *sa_dev +
964 (e - s + 1) * sizeof (struct ib_sa_port),
969 sa_dev->start_port = s;
970 sa_dev->end_port = e;
972 for (i = 0; i <= e - s; ++i) {
973 sa_dev->port[i].sm_ah = NULL;
974 sa_dev->port[i].port_num = i + s;
975 spin_lock_init(&sa_dev->port[i].ah_lock);
977 sa_dev->port[i].agent =
978 ib_register_mad_agent(device, i + s, IB_QPT_GSI,
979 NULL, 0, send_handler,
980 recv_handler, sa_dev);
981 if (IS_ERR(sa_dev->port[i].agent))
984 INIT_WORK(&sa_dev->port[i].update_task, update_sm_ah);
987 ib_set_client_data(device, &sa_client, sa_dev);
990 * We register our event handler after everything is set up,
991 * and then update our cached info after the event handler is
992 * registered to avoid any problems if a port changes state
993 * during our initialization.
996 INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event);
997 if (ib_register_event_handler(&sa_dev->event_handler))
1000 for (i = 0; i <= e - s; ++i)
1001 update_sm_ah(&sa_dev->port[i].update_task);
1007 ib_unregister_mad_agent(sa_dev->port[i].agent);
1014 static void ib_sa_remove_one(struct ib_device *device)
1016 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1022 ib_unregister_event_handler(&sa_dev->event_handler);
1024 flush_scheduled_work();
1026 for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) {
1027 ib_unregister_mad_agent(sa_dev->port[i].agent);
1028 kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah);
1034 static int __init ib_sa_init(void)
1038 spin_lock_init(&idr_lock);
1039 spin_lock_init(&tid_lock);
1041 get_random_bytes(&tid, sizeof tid);
1043 ret = ib_register_client(&sa_client);
1045 printk(KERN_ERR "Couldn't register ib_sa client\n");
1051 printk(KERN_ERR "Couldn't initialize multicast handling\n");
1057 ib_unregister_client(&sa_client);
1062 static void __exit ib_sa_cleanup(void)
1065 ib_unregister_client(&sa_client);
1066 idr_destroy(&query_idr);
1069 module_init(ib_sa_init);
1070 module_exit(ib_sa_cleanup);