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/dma-mapping.h>
44 #include <linux/kref.h>
45 #include <linux/idr.h>
46 #include <linux/workqueue.h>
48 #include <rdma/ib_pack.h>
49 #include <rdma/ib_cache.h>
52 MODULE_AUTHOR("Roland Dreier");
53 MODULE_DESCRIPTION("InfiniBand subnet administration query support");
54 MODULE_LICENSE("Dual BSD/GPL");
64 struct ib_mad_agent *agent;
65 struct ib_sa_sm_ah *sm_ah;
66 struct work_struct update_task;
72 int start_port, end_port;
73 struct ib_event_handler event_handler;
74 struct ib_sa_port port[0];
78 void (*callback)(struct ib_sa_query *, int, struct ib_sa_mad *);
79 void (*release)(struct ib_sa_query *);
80 struct ib_sa_client *client;
81 struct ib_sa_port *port;
82 struct ib_mad_send_buf *mad_buf;
83 struct ib_sa_sm_ah *sm_ah;
87 struct ib_sa_service_query {
88 void (*callback)(int, struct ib_sa_service_rec *, void *);
90 struct ib_sa_query sa_query;
93 struct ib_sa_path_query {
94 void (*callback)(int, struct ib_sa_path_rec *, void *);
96 struct ib_sa_query sa_query;
99 struct ib_sa_mcmember_query {
100 void (*callback)(int, struct ib_sa_mcmember_rec *, void *);
102 struct ib_sa_query sa_query;
105 static void ib_sa_add_one(struct ib_device *device);
106 static void ib_sa_remove_one(struct ib_device *device);
108 static struct ib_client sa_client = {
110 .add = ib_sa_add_one,
111 .remove = ib_sa_remove_one
114 static spinlock_t idr_lock;
115 static DEFINE_IDR(query_idr);
117 static spinlock_t tid_lock;
120 #define PATH_REC_FIELD(field) \
121 .struct_offset_bytes = offsetof(struct ib_sa_path_rec, field), \
122 .struct_size_bytes = sizeof ((struct ib_sa_path_rec *) 0)->field, \
123 .field_name = "sa_path_rec:" #field
125 static const struct ib_field path_rec_table[] = {
134 { PATH_REC_FIELD(dgid),
138 { PATH_REC_FIELD(sgid),
142 { PATH_REC_FIELD(dlid),
146 { PATH_REC_FIELD(slid),
150 { PATH_REC_FIELD(raw_traffic),
158 { PATH_REC_FIELD(flow_label),
162 { PATH_REC_FIELD(hop_limit),
166 { PATH_REC_FIELD(traffic_class),
170 { PATH_REC_FIELD(reversible),
174 { PATH_REC_FIELD(numb_path),
178 { PATH_REC_FIELD(pkey),
186 { PATH_REC_FIELD(sl),
190 { PATH_REC_FIELD(mtu_selector),
194 { PATH_REC_FIELD(mtu),
198 { PATH_REC_FIELD(rate_selector),
202 { PATH_REC_FIELD(rate),
206 { PATH_REC_FIELD(packet_life_time_selector),
210 { PATH_REC_FIELD(packet_life_time),
214 { PATH_REC_FIELD(preference),
224 #define MCMEMBER_REC_FIELD(field) \
225 .struct_offset_bytes = offsetof(struct ib_sa_mcmember_rec, field), \
226 .struct_size_bytes = sizeof ((struct ib_sa_mcmember_rec *) 0)->field, \
227 .field_name = "sa_mcmember_rec:" #field
229 static const struct ib_field mcmember_rec_table[] = {
230 { MCMEMBER_REC_FIELD(mgid),
234 { MCMEMBER_REC_FIELD(port_gid),
238 { MCMEMBER_REC_FIELD(qkey),
242 { MCMEMBER_REC_FIELD(mlid),
246 { MCMEMBER_REC_FIELD(mtu_selector),
250 { MCMEMBER_REC_FIELD(mtu),
254 { MCMEMBER_REC_FIELD(traffic_class),
258 { MCMEMBER_REC_FIELD(pkey),
262 { MCMEMBER_REC_FIELD(rate_selector),
266 { MCMEMBER_REC_FIELD(rate),
270 { MCMEMBER_REC_FIELD(packet_life_time_selector),
274 { MCMEMBER_REC_FIELD(packet_life_time),
278 { MCMEMBER_REC_FIELD(sl),
282 { MCMEMBER_REC_FIELD(flow_label),
286 { MCMEMBER_REC_FIELD(hop_limit),
290 { MCMEMBER_REC_FIELD(scope),
294 { MCMEMBER_REC_FIELD(join_state),
298 { MCMEMBER_REC_FIELD(proxy_join),
308 #define SERVICE_REC_FIELD(field) \
309 .struct_offset_bytes = offsetof(struct ib_sa_service_rec, field), \
310 .struct_size_bytes = sizeof ((struct ib_sa_service_rec *) 0)->field, \
311 .field_name = "sa_service_rec:" #field
313 static const struct ib_field service_rec_table[] = {
314 { SERVICE_REC_FIELD(id),
318 { SERVICE_REC_FIELD(gid),
322 { SERVICE_REC_FIELD(pkey),
326 { SERVICE_REC_FIELD(lease),
330 { SERVICE_REC_FIELD(key),
334 { SERVICE_REC_FIELD(name),
338 { SERVICE_REC_FIELD(data8),
342 { SERVICE_REC_FIELD(data16),
346 { SERVICE_REC_FIELD(data32),
350 { SERVICE_REC_FIELD(data64),
356 static void free_sm_ah(struct kref *kref)
358 struct ib_sa_sm_ah *sm_ah = container_of(kref, struct ib_sa_sm_ah, ref);
360 ib_destroy_ah(sm_ah->ah);
364 static void update_sm_ah(struct work_struct *work)
366 struct ib_sa_port *port =
367 container_of(work, struct ib_sa_port, update_task);
368 struct ib_sa_sm_ah *new_ah, *old_ah;
369 struct ib_port_attr port_attr;
370 struct ib_ah_attr ah_attr;
372 if (ib_query_port(port->agent->device, port->port_num, &port_attr)) {
373 printk(KERN_WARNING "Couldn't query port\n");
377 new_ah = kmalloc(sizeof *new_ah, GFP_KERNEL);
379 printk(KERN_WARNING "Couldn't allocate new SM AH\n");
383 kref_init(&new_ah->ref);
384 new_ah->src_path_mask = (1 << port_attr.lmc) - 1;
386 new_ah->pkey_index = 0;
387 if (ib_find_pkey(port->agent->device, port->port_num,
388 IB_DEFAULT_PKEY_FULL, &new_ah->pkey_index))
389 printk(KERN_ERR "Couldn't find index for default PKey\n");
391 memset(&ah_attr, 0, sizeof ah_attr);
392 ah_attr.dlid = port_attr.sm_lid;
393 ah_attr.sl = port_attr.sm_sl;
394 ah_attr.port_num = port->port_num;
396 new_ah->ah = ib_create_ah(port->agent->qp->pd, &ah_attr);
397 if (IS_ERR(new_ah->ah)) {
398 printk(KERN_WARNING "Couldn't create new SM AH\n");
403 spin_lock_irq(&port->ah_lock);
404 old_ah = port->sm_ah;
405 port->sm_ah = new_ah;
406 spin_unlock_irq(&port->ah_lock);
409 kref_put(&old_ah->ref, free_sm_ah);
412 static void ib_sa_event(struct ib_event_handler *handler, struct ib_event *event)
414 if (event->event == IB_EVENT_PORT_ERR ||
415 event->event == IB_EVENT_PORT_ACTIVE ||
416 event->event == IB_EVENT_LID_CHANGE ||
417 event->event == IB_EVENT_PKEY_CHANGE ||
418 event->event == IB_EVENT_SM_CHANGE ||
419 event->event == IB_EVENT_CLIENT_REREGISTER) {
420 struct ib_sa_device *sa_dev;
421 sa_dev = container_of(handler, typeof(*sa_dev), event_handler);
423 schedule_work(&sa_dev->port[event->element.port_num -
424 sa_dev->start_port].update_task);
428 void ib_sa_register_client(struct ib_sa_client *client)
430 atomic_set(&client->users, 1);
431 init_completion(&client->comp);
433 EXPORT_SYMBOL(ib_sa_register_client);
435 void ib_sa_unregister_client(struct ib_sa_client *client)
437 ib_sa_client_put(client);
438 wait_for_completion(&client->comp);
440 EXPORT_SYMBOL(ib_sa_unregister_client);
443 * ib_sa_cancel_query - try to cancel an SA query
444 * @id:ID of query to cancel
445 * @query:query pointer to cancel
447 * Try to cancel an SA query. If the id and query don't match up or
448 * the query has already completed, nothing is done. Otherwise the
449 * query is canceled and will complete with a status of -EINTR.
451 void ib_sa_cancel_query(int id, struct ib_sa_query *query)
454 struct ib_mad_agent *agent;
455 struct ib_mad_send_buf *mad_buf;
457 spin_lock_irqsave(&idr_lock, flags);
458 if (idr_find(&query_idr, id) != query) {
459 spin_unlock_irqrestore(&idr_lock, flags);
462 agent = query->port->agent;
463 mad_buf = query->mad_buf;
464 spin_unlock_irqrestore(&idr_lock, flags);
466 ib_cancel_mad(agent, mad_buf);
468 EXPORT_SYMBOL(ib_sa_cancel_query);
470 static u8 get_src_path_mask(struct ib_device *device, u8 port_num)
472 struct ib_sa_device *sa_dev;
473 struct ib_sa_port *port;
477 sa_dev = ib_get_client_data(device, &sa_client);
481 port = &sa_dev->port[port_num - sa_dev->start_port];
482 spin_lock_irqsave(&port->ah_lock, flags);
483 src_path_mask = port->sm_ah ? port->sm_ah->src_path_mask : 0x7f;
484 spin_unlock_irqrestore(&port->ah_lock, flags);
486 return src_path_mask;
489 int ib_init_ah_from_path(struct ib_device *device, u8 port_num,
490 struct ib_sa_path_rec *rec, struct ib_ah_attr *ah_attr)
495 memset(ah_attr, 0, sizeof *ah_attr);
496 ah_attr->dlid = be16_to_cpu(rec->dlid);
497 ah_attr->sl = rec->sl;
498 ah_attr->src_path_bits = be16_to_cpu(rec->slid) &
499 get_src_path_mask(device, port_num);
500 ah_attr->port_num = port_num;
501 ah_attr->static_rate = rec->rate;
503 if (rec->hop_limit > 1) {
504 ah_attr->ah_flags = IB_AH_GRH;
505 ah_attr->grh.dgid = rec->dgid;
507 ret = ib_find_cached_gid(device, &rec->sgid, &port_num,
512 ah_attr->grh.sgid_index = gid_index;
513 ah_attr->grh.flow_label = be32_to_cpu(rec->flow_label);
514 ah_attr->grh.hop_limit = rec->hop_limit;
515 ah_attr->grh.traffic_class = rec->traffic_class;
519 EXPORT_SYMBOL(ib_init_ah_from_path);
521 static int alloc_mad(struct ib_sa_query *query, gfp_t gfp_mask)
525 spin_lock_irqsave(&query->port->ah_lock, flags);
526 kref_get(&query->port->sm_ah->ref);
527 query->sm_ah = query->port->sm_ah;
528 spin_unlock_irqrestore(&query->port->ah_lock, flags);
530 query->mad_buf = ib_create_send_mad(query->port->agent, 1,
531 query->sm_ah->pkey_index,
532 0, IB_MGMT_SA_HDR, IB_MGMT_SA_DATA,
534 if (!query->mad_buf) {
535 kref_put(&query->sm_ah->ref, free_sm_ah);
539 query->mad_buf->ah = query->sm_ah->ah;
544 static void free_mad(struct ib_sa_query *query)
546 ib_free_send_mad(query->mad_buf);
547 kref_put(&query->sm_ah->ref, free_sm_ah);
550 static void init_mad(struct ib_sa_mad *mad, struct ib_mad_agent *agent)
554 memset(mad, 0, sizeof *mad);
556 mad->mad_hdr.base_version = IB_MGMT_BASE_VERSION;
557 mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM;
558 mad->mad_hdr.class_version = IB_SA_CLASS_VERSION;
560 spin_lock_irqsave(&tid_lock, flags);
562 cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++);
563 spin_unlock_irqrestore(&tid_lock, flags);
566 static int send_mad(struct ib_sa_query *query, int timeout_ms, gfp_t gfp_mask)
572 if (!idr_pre_get(&query_idr, gfp_mask))
574 spin_lock_irqsave(&idr_lock, flags);
575 ret = idr_get_new(&query_idr, query, &id);
576 spin_unlock_irqrestore(&idr_lock, flags);
582 query->mad_buf->timeout_ms = timeout_ms;
583 query->mad_buf->context[0] = query;
586 ret = ib_post_send_mad(query->mad_buf, NULL);
588 spin_lock_irqsave(&idr_lock, flags);
589 idr_remove(&query_idr, id);
590 spin_unlock_irqrestore(&idr_lock, flags);
594 * It's not safe to dereference query any more, because the
595 * send may already have completed and freed the query in
598 return ret ? ret : id;
601 static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query,
603 struct ib_sa_mad *mad)
605 struct ib_sa_path_query *query =
606 container_of(sa_query, struct ib_sa_path_query, sa_query);
609 struct ib_sa_path_rec rec;
611 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table),
613 query->callback(status, &rec, query->context);
615 query->callback(status, NULL, query->context);
618 static void ib_sa_path_rec_release(struct ib_sa_query *sa_query)
620 kfree(container_of(sa_query, struct ib_sa_path_query, sa_query));
624 * ib_sa_path_rec_get - Start a Path get query
626 * @device:device to send query on
627 * @port_num: port number to send query on
628 * @rec:Path Record to send in query
629 * @comp_mask:component mask to send in query
630 * @timeout_ms:time to wait for response
631 * @gfp_mask:GFP mask to use for internal allocations
632 * @callback:function called when query completes, times out or is
634 * @context:opaque user context passed to callback
635 * @sa_query:query context, used to cancel query
637 * Send a Path Record Get query to the SA to look up a path. The
638 * callback function will be called when the query completes (or
639 * fails); status is 0 for a successful response, -EINTR if the query
640 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
641 * occurred sending the query. The resp parameter of the callback is
642 * only valid if status is 0.
644 * If the return value of ib_sa_path_rec_get() is negative, it is an
645 * error code. Otherwise it is a query ID that can be used to cancel
648 int ib_sa_path_rec_get(struct ib_sa_client *client,
649 struct ib_device *device, u8 port_num,
650 struct ib_sa_path_rec *rec,
651 ib_sa_comp_mask comp_mask,
652 int timeout_ms, gfp_t gfp_mask,
653 void (*callback)(int status,
654 struct ib_sa_path_rec *resp,
657 struct ib_sa_query **sa_query)
659 struct ib_sa_path_query *query;
660 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
661 struct ib_sa_port *port;
662 struct ib_mad_agent *agent;
663 struct ib_sa_mad *mad;
669 port = &sa_dev->port[port_num - sa_dev->start_port];
672 query = kmalloc(sizeof *query, gfp_mask);
676 query->sa_query.port = port;
677 ret = alloc_mad(&query->sa_query, gfp_mask);
681 ib_sa_client_get(client);
682 query->sa_query.client = client;
683 query->callback = callback;
684 query->context = context;
686 mad = query->sa_query.mad_buf->mad;
687 init_mad(mad, agent);
689 query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL;
690 query->sa_query.release = ib_sa_path_rec_release;
691 mad->mad_hdr.method = IB_MGMT_METHOD_GET;
692 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC);
693 mad->sa_hdr.comp_mask = comp_mask;
695 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, mad->data);
697 *sa_query = &query->sa_query;
699 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
707 ib_sa_client_put(query->sa_query.client);
708 free_mad(&query->sa_query);
714 EXPORT_SYMBOL(ib_sa_path_rec_get);
716 static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query,
718 struct ib_sa_mad *mad)
720 struct ib_sa_service_query *query =
721 container_of(sa_query, struct ib_sa_service_query, sa_query);
724 struct ib_sa_service_rec rec;
726 ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table),
728 query->callback(status, &rec, query->context);
730 query->callback(status, NULL, query->context);
733 static void ib_sa_service_rec_release(struct ib_sa_query *sa_query)
735 kfree(container_of(sa_query, struct ib_sa_service_query, sa_query));
739 * ib_sa_service_rec_query - Start Service Record operation
741 * @device:device to send request on
742 * @port_num: port number to send request on
743 * @method:SA method - should be get, set, or delete
744 * @rec:Service Record to send in request
745 * @comp_mask:component mask to send in request
746 * @timeout_ms:time to wait for response
747 * @gfp_mask:GFP mask to use for internal allocations
748 * @callback:function called when request completes, times out or is
750 * @context:opaque user context passed to callback
751 * @sa_query:request context, used to cancel request
753 * Send a Service Record set/get/delete to the SA to register,
754 * unregister or query a service record.
755 * The callback function will be called when the request completes (or
756 * fails); status is 0 for a successful response, -EINTR if the query
757 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
758 * occurred sending the query. The resp parameter of the callback is
759 * only valid if status is 0.
761 * If the return value of ib_sa_service_rec_query() is negative, it is an
762 * error code. Otherwise it is a request ID that can be used to cancel
765 int ib_sa_service_rec_query(struct ib_sa_client *client,
766 struct ib_device *device, u8 port_num, u8 method,
767 struct ib_sa_service_rec *rec,
768 ib_sa_comp_mask comp_mask,
769 int timeout_ms, gfp_t gfp_mask,
770 void (*callback)(int status,
771 struct ib_sa_service_rec *resp,
774 struct ib_sa_query **sa_query)
776 struct ib_sa_service_query *query;
777 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
778 struct ib_sa_port *port;
779 struct ib_mad_agent *agent;
780 struct ib_sa_mad *mad;
786 port = &sa_dev->port[port_num - sa_dev->start_port];
789 if (method != IB_MGMT_METHOD_GET &&
790 method != IB_MGMT_METHOD_SET &&
791 method != IB_SA_METHOD_DELETE)
794 query = kmalloc(sizeof *query, gfp_mask);
798 query->sa_query.port = port;
799 ret = alloc_mad(&query->sa_query, gfp_mask);
803 ib_sa_client_get(client);
804 query->sa_query.client = client;
805 query->callback = callback;
806 query->context = context;
808 mad = query->sa_query.mad_buf->mad;
809 init_mad(mad, agent);
811 query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL;
812 query->sa_query.release = ib_sa_service_rec_release;
813 mad->mad_hdr.method = method;
814 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_SERVICE_REC);
815 mad->sa_hdr.comp_mask = comp_mask;
817 ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table),
820 *sa_query = &query->sa_query;
822 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
830 ib_sa_client_put(query->sa_query.client);
831 free_mad(&query->sa_query);
837 EXPORT_SYMBOL(ib_sa_service_rec_query);
839 static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query,
841 struct ib_sa_mad *mad)
843 struct ib_sa_mcmember_query *query =
844 container_of(sa_query, struct ib_sa_mcmember_query, sa_query);
847 struct ib_sa_mcmember_rec rec;
849 ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
851 query->callback(status, &rec, query->context);
853 query->callback(status, NULL, query->context);
856 static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query)
858 kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query));
861 int ib_sa_mcmember_rec_query(struct ib_sa_client *client,
862 struct ib_device *device, u8 port_num,
864 struct ib_sa_mcmember_rec *rec,
865 ib_sa_comp_mask comp_mask,
866 int timeout_ms, gfp_t gfp_mask,
867 void (*callback)(int status,
868 struct ib_sa_mcmember_rec *resp,
871 struct ib_sa_query **sa_query)
873 struct ib_sa_mcmember_query *query;
874 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
875 struct ib_sa_port *port;
876 struct ib_mad_agent *agent;
877 struct ib_sa_mad *mad;
883 port = &sa_dev->port[port_num - sa_dev->start_port];
886 query = kmalloc(sizeof *query, gfp_mask);
890 query->sa_query.port = port;
891 ret = alloc_mad(&query->sa_query, gfp_mask);
895 ib_sa_client_get(client);
896 query->sa_query.client = client;
897 query->callback = callback;
898 query->context = context;
900 mad = query->sa_query.mad_buf->mad;
901 init_mad(mad, agent);
903 query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL;
904 query->sa_query.release = ib_sa_mcmember_rec_release;
905 mad->mad_hdr.method = method;
906 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC);
907 mad->sa_hdr.comp_mask = comp_mask;
909 ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
912 *sa_query = &query->sa_query;
914 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
922 ib_sa_client_put(query->sa_query.client);
923 free_mad(&query->sa_query);
930 static void send_handler(struct ib_mad_agent *agent,
931 struct ib_mad_send_wc *mad_send_wc)
933 struct ib_sa_query *query = mad_send_wc->send_buf->context[0];
937 switch (mad_send_wc->status) {
939 /* No callback -- already got recv */
941 case IB_WC_RESP_TIMEOUT_ERR:
942 query->callback(query, -ETIMEDOUT, NULL);
944 case IB_WC_WR_FLUSH_ERR:
945 query->callback(query, -EINTR, NULL);
948 query->callback(query, -EIO, NULL);
952 spin_lock_irqsave(&idr_lock, flags);
953 idr_remove(&query_idr, query->id);
954 spin_unlock_irqrestore(&idr_lock, flags);
957 ib_sa_client_put(query->client);
958 query->release(query);
961 static void recv_handler(struct ib_mad_agent *mad_agent,
962 struct ib_mad_recv_wc *mad_recv_wc)
964 struct ib_sa_query *query;
965 struct ib_mad_send_buf *mad_buf;
967 mad_buf = (void *) (unsigned long) mad_recv_wc->wc->wr_id;
968 query = mad_buf->context[0];
970 if (query->callback) {
971 if (mad_recv_wc->wc->status == IB_WC_SUCCESS)
972 query->callback(query,
973 mad_recv_wc->recv_buf.mad->mad_hdr.status ?
975 (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad);
977 query->callback(query, -EIO, NULL);
980 ib_free_recv_mad(mad_recv_wc);
983 static void ib_sa_add_one(struct ib_device *device)
985 struct ib_sa_device *sa_dev;
988 if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB)
991 if (device->node_type == RDMA_NODE_IB_SWITCH)
995 e = device->phys_port_cnt;
998 sa_dev = kmalloc(sizeof *sa_dev +
999 (e - s + 1) * sizeof (struct ib_sa_port),
1004 sa_dev->start_port = s;
1005 sa_dev->end_port = e;
1007 for (i = 0; i <= e - s; ++i) {
1008 sa_dev->port[i].sm_ah = NULL;
1009 sa_dev->port[i].port_num = i + s;
1010 spin_lock_init(&sa_dev->port[i].ah_lock);
1012 sa_dev->port[i].agent =
1013 ib_register_mad_agent(device, i + s, IB_QPT_GSI,
1014 NULL, 0, send_handler,
1015 recv_handler, sa_dev);
1016 if (IS_ERR(sa_dev->port[i].agent))
1019 INIT_WORK(&sa_dev->port[i].update_task, update_sm_ah);
1022 ib_set_client_data(device, &sa_client, sa_dev);
1025 * We register our event handler after everything is set up,
1026 * and then update our cached info after the event handler is
1027 * registered to avoid any problems if a port changes state
1028 * during our initialization.
1031 INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event);
1032 if (ib_register_event_handler(&sa_dev->event_handler))
1035 for (i = 0; i <= e - s; ++i)
1036 update_sm_ah(&sa_dev->port[i].update_task);
1042 ib_unregister_mad_agent(sa_dev->port[i].agent);
1049 static void ib_sa_remove_one(struct ib_device *device)
1051 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1057 ib_unregister_event_handler(&sa_dev->event_handler);
1059 flush_scheduled_work();
1061 for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) {
1062 ib_unregister_mad_agent(sa_dev->port[i].agent);
1063 kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah);
1069 static int __init ib_sa_init(void)
1073 spin_lock_init(&idr_lock);
1074 spin_lock_init(&tid_lock);
1076 get_random_bytes(&tid, sizeof tid);
1078 ret = ib_register_client(&sa_client);
1080 printk(KERN_ERR "Couldn't register ib_sa client\n");
1086 printk(KERN_ERR "Couldn't initialize multicast handling\n");
1092 ib_unregister_client(&sa_client);
1097 static void __exit ib_sa_cleanup(void)
1100 ib_unregister_client(&sa_client);
1101 idr_destroy(&query_idr);
1104 module_init(ib_sa_init);
1105 module_exit(ib_sa_cleanup);