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_guidinfo_query {
98 void (*callback)(int, struct ib_sa_guidinfo_rec *, void *);
100 struct ib_sa_query sa_query;
103 struct ib_sa_mcmember_query {
104 void (*callback)(int, struct ib_sa_mcmember_rec *, void *);
106 struct ib_sa_query sa_query;
109 static void ib_sa_add_one(struct ib_device *device);
110 static void ib_sa_remove_one(struct ib_device *device);
112 static struct ib_client sa_client = {
114 .add = ib_sa_add_one,
115 .remove = ib_sa_remove_one
118 static DEFINE_SPINLOCK(idr_lock);
119 static DEFINE_IDR(query_idr);
121 static DEFINE_SPINLOCK(tid_lock);
124 #define PATH_REC_FIELD(field) \
125 .struct_offset_bytes = offsetof(struct ib_sa_path_rec, field), \
126 .struct_size_bytes = sizeof ((struct ib_sa_path_rec *) 0)->field, \
127 .field_name = "sa_path_rec:" #field
129 static const struct ib_field path_rec_table[] = {
130 { PATH_REC_FIELD(service_id),
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),
182 { PATH_REC_FIELD(qos_class),
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 #define GUIDINFO_REC_FIELD(field) \
357 .struct_offset_bytes = offsetof(struct ib_sa_guidinfo_rec, field), \
358 .struct_size_bytes = sizeof((struct ib_sa_guidinfo_rec *) 0)->field, \
359 .field_name = "sa_guidinfo_rec:" #field
361 static const struct ib_field guidinfo_rec_table[] = {
362 { GUIDINFO_REC_FIELD(lid),
366 { GUIDINFO_REC_FIELD(block_num),
370 { GUIDINFO_REC_FIELD(res1),
374 { GUIDINFO_REC_FIELD(res2),
378 { GUIDINFO_REC_FIELD(guid_info_list),
384 static void free_sm_ah(struct kref *kref)
386 struct ib_sa_sm_ah *sm_ah = container_of(kref, struct ib_sa_sm_ah, ref);
388 ib_destroy_ah(sm_ah->ah);
392 static void update_sm_ah(struct work_struct *work)
394 struct ib_sa_port *port =
395 container_of(work, struct ib_sa_port, update_task);
396 struct ib_sa_sm_ah *new_ah;
397 struct ib_port_attr port_attr;
398 struct ib_ah_attr ah_attr;
400 if (ib_query_port(port->agent->device, port->port_num, &port_attr)) {
401 printk(KERN_WARNING "Couldn't query port\n");
405 new_ah = kmalloc(sizeof *new_ah, GFP_KERNEL);
407 printk(KERN_WARNING "Couldn't allocate new SM AH\n");
411 kref_init(&new_ah->ref);
412 new_ah->src_path_mask = (1 << port_attr.lmc) - 1;
414 new_ah->pkey_index = 0;
415 if (ib_find_pkey(port->agent->device, port->port_num,
416 IB_DEFAULT_PKEY_FULL, &new_ah->pkey_index))
417 printk(KERN_ERR "Couldn't find index for default PKey\n");
419 memset(&ah_attr, 0, sizeof ah_attr);
420 ah_attr.dlid = port_attr.sm_lid;
421 ah_attr.sl = port_attr.sm_sl;
422 ah_attr.port_num = port->port_num;
424 new_ah->ah = ib_create_ah(port->agent->qp->pd, &ah_attr);
425 if (IS_ERR(new_ah->ah)) {
426 printk(KERN_WARNING "Couldn't create new SM AH\n");
431 spin_lock_irq(&port->ah_lock);
433 kref_put(&port->sm_ah->ref, free_sm_ah);
434 port->sm_ah = new_ah;
435 spin_unlock_irq(&port->ah_lock);
439 static void ib_sa_event(struct ib_event_handler *handler, struct ib_event *event)
441 if (event->event == IB_EVENT_PORT_ERR ||
442 event->event == IB_EVENT_PORT_ACTIVE ||
443 event->event == IB_EVENT_LID_CHANGE ||
444 event->event == IB_EVENT_PKEY_CHANGE ||
445 event->event == IB_EVENT_SM_CHANGE ||
446 event->event == IB_EVENT_CLIENT_REREGISTER) {
448 struct ib_sa_device *sa_dev =
449 container_of(handler, typeof(*sa_dev), event_handler);
450 struct ib_sa_port *port =
451 &sa_dev->port[event->element.port_num - sa_dev->start_port];
453 if (rdma_port_get_link_layer(handler->device, port->port_num) != IB_LINK_LAYER_INFINIBAND)
456 spin_lock_irqsave(&port->ah_lock, flags);
458 kref_put(&port->sm_ah->ref, free_sm_ah);
460 spin_unlock_irqrestore(&port->ah_lock, flags);
462 queue_work(ib_wq, &sa_dev->port[event->element.port_num -
463 sa_dev->start_port].update_task);
467 void ib_sa_register_client(struct ib_sa_client *client)
469 atomic_set(&client->users, 1);
470 init_completion(&client->comp);
472 EXPORT_SYMBOL(ib_sa_register_client);
474 void ib_sa_unregister_client(struct ib_sa_client *client)
476 ib_sa_client_put(client);
477 wait_for_completion(&client->comp);
479 EXPORT_SYMBOL(ib_sa_unregister_client);
482 * ib_sa_cancel_query - try to cancel an SA query
483 * @id:ID of query to cancel
484 * @query:query pointer to cancel
486 * Try to cancel an SA query. If the id and query don't match up or
487 * the query has already completed, nothing is done. Otherwise the
488 * query is canceled and will complete with a status of -EINTR.
490 void ib_sa_cancel_query(int id, struct ib_sa_query *query)
493 struct ib_mad_agent *agent;
494 struct ib_mad_send_buf *mad_buf;
496 spin_lock_irqsave(&idr_lock, flags);
497 if (idr_find(&query_idr, id) != query) {
498 spin_unlock_irqrestore(&idr_lock, flags);
501 agent = query->port->agent;
502 mad_buf = query->mad_buf;
503 spin_unlock_irqrestore(&idr_lock, flags);
505 ib_cancel_mad(agent, mad_buf);
507 EXPORT_SYMBOL(ib_sa_cancel_query);
509 static u8 get_src_path_mask(struct ib_device *device, u8 port_num)
511 struct ib_sa_device *sa_dev;
512 struct ib_sa_port *port;
516 sa_dev = ib_get_client_data(device, &sa_client);
520 port = &sa_dev->port[port_num - sa_dev->start_port];
521 spin_lock_irqsave(&port->ah_lock, flags);
522 src_path_mask = port->sm_ah ? port->sm_ah->src_path_mask : 0x7f;
523 spin_unlock_irqrestore(&port->ah_lock, flags);
525 return src_path_mask;
528 int ib_init_ah_from_path(struct ib_device *device, u8 port_num,
529 struct ib_sa_path_rec *rec, struct ib_ah_attr *ah_attr)
535 memset(ah_attr, 0, sizeof *ah_attr);
536 ah_attr->dlid = be16_to_cpu(rec->dlid);
537 ah_attr->sl = rec->sl;
538 ah_attr->src_path_bits = be16_to_cpu(rec->slid) &
539 get_src_path_mask(device, port_num);
540 ah_attr->port_num = port_num;
541 ah_attr->static_rate = rec->rate;
543 force_grh = rdma_port_get_link_layer(device, port_num) == IB_LINK_LAYER_ETHERNET;
545 if (rec->hop_limit > 1 || force_grh) {
546 ah_attr->ah_flags = IB_AH_GRH;
547 ah_attr->grh.dgid = rec->dgid;
549 ret = ib_find_cached_gid(device, &rec->sgid, &port_num,
554 ah_attr->grh.sgid_index = gid_index;
555 ah_attr->grh.flow_label = be32_to_cpu(rec->flow_label);
556 ah_attr->grh.hop_limit = rec->hop_limit;
557 ah_attr->grh.traffic_class = rec->traffic_class;
561 EXPORT_SYMBOL(ib_init_ah_from_path);
563 static int alloc_mad(struct ib_sa_query *query, gfp_t gfp_mask)
567 spin_lock_irqsave(&query->port->ah_lock, flags);
568 if (!query->port->sm_ah) {
569 spin_unlock_irqrestore(&query->port->ah_lock, flags);
572 kref_get(&query->port->sm_ah->ref);
573 query->sm_ah = query->port->sm_ah;
574 spin_unlock_irqrestore(&query->port->ah_lock, flags);
576 query->mad_buf = ib_create_send_mad(query->port->agent, 1,
577 query->sm_ah->pkey_index,
578 0, IB_MGMT_SA_HDR, IB_MGMT_SA_DATA,
580 if (IS_ERR(query->mad_buf)) {
581 kref_put(&query->sm_ah->ref, free_sm_ah);
585 query->mad_buf->ah = query->sm_ah->ah;
590 static void free_mad(struct ib_sa_query *query)
592 ib_free_send_mad(query->mad_buf);
593 kref_put(&query->sm_ah->ref, free_sm_ah);
596 static void init_mad(struct ib_sa_mad *mad, struct ib_mad_agent *agent)
600 memset(mad, 0, sizeof *mad);
602 mad->mad_hdr.base_version = IB_MGMT_BASE_VERSION;
603 mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM;
604 mad->mad_hdr.class_version = IB_SA_CLASS_VERSION;
606 spin_lock_irqsave(&tid_lock, flags);
608 cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++);
609 spin_unlock_irqrestore(&tid_lock, flags);
612 static int send_mad(struct ib_sa_query *query, int timeout_ms, gfp_t gfp_mask)
614 bool preload = gfp_mask & __GFP_WAIT;
619 idr_preload(gfp_mask);
620 spin_lock_irqsave(&idr_lock, flags);
622 id = idr_alloc(&query_idr, query, 0, 0, GFP_NOWAIT);
624 spin_unlock_irqrestore(&idr_lock, flags);
630 query->mad_buf->timeout_ms = timeout_ms;
631 query->mad_buf->context[0] = query;
634 ret = ib_post_send_mad(query->mad_buf, NULL);
636 spin_lock_irqsave(&idr_lock, flags);
637 idr_remove(&query_idr, id);
638 spin_unlock_irqrestore(&idr_lock, flags);
642 * It's not safe to dereference query any more, because the
643 * send may already have completed and freed the query in
646 return ret ? ret : id;
649 void ib_sa_unpack_path(void *attribute, struct ib_sa_path_rec *rec)
651 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), attribute, rec);
653 EXPORT_SYMBOL(ib_sa_unpack_path);
655 static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query,
657 struct ib_sa_mad *mad)
659 struct ib_sa_path_query *query =
660 container_of(sa_query, struct ib_sa_path_query, sa_query);
663 struct ib_sa_path_rec rec;
665 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table),
667 query->callback(status, &rec, query->context);
669 query->callback(status, NULL, query->context);
672 static void ib_sa_path_rec_release(struct ib_sa_query *sa_query)
674 kfree(container_of(sa_query, struct ib_sa_path_query, sa_query));
678 * ib_sa_path_rec_get - Start a Path get query
680 * @device:device to send query on
681 * @port_num: port number to send query on
682 * @rec:Path Record to send in query
683 * @comp_mask:component mask to send in query
684 * @timeout_ms:time to wait for response
685 * @gfp_mask:GFP mask to use for internal allocations
686 * @callback:function called when query completes, times out or is
688 * @context:opaque user context passed to callback
689 * @sa_query:query context, used to cancel query
691 * Send a Path Record Get query to the SA to look up a path. The
692 * callback function will be called when the query completes (or
693 * fails); status is 0 for a successful response, -EINTR if the query
694 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
695 * occurred sending the query. The resp parameter of the callback is
696 * only valid if status is 0.
698 * If the return value of ib_sa_path_rec_get() is negative, it is an
699 * error code. Otherwise it is a query ID that can be used to cancel
702 int ib_sa_path_rec_get(struct ib_sa_client *client,
703 struct ib_device *device, u8 port_num,
704 struct ib_sa_path_rec *rec,
705 ib_sa_comp_mask comp_mask,
706 int timeout_ms, gfp_t gfp_mask,
707 void (*callback)(int status,
708 struct ib_sa_path_rec *resp,
711 struct ib_sa_query **sa_query)
713 struct ib_sa_path_query *query;
714 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
715 struct ib_sa_port *port;
716 struct ib_mad_agent *agent;
717 struct ib_sa_mad *mad;
723 port = &sa_dev->port[port_num - sa_dev->start_port];
726 query = kmalloc(sizeof *query, gfp_mask);
730 query->sa_query.port = port;
731 ret = alloc_mad(&query->sa_query, gfp_mask);
735 ib_sa_client_get(client);
736 query->sa_query.client = client;
737 query->callback = callback;
738 query->context = context;
740 mad = query->sa_query.mad_buf->mad;
741 init_mad(mad, agent);
743 query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL;
744 query->sa_query.release = ib_sa_path_rec_release;
745 mad->mad_hdr.method = IB_MGMT_METHOD_GET;
746 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC);
747 mad->sa_hdr.comp_mask = comp_mask;
749 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, mad->data);
751 *sa_query = &query->sa_query;
753 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
761 ib_sa_client_put(query->sa_query.client);
762 free_mad(&query->sa_query);
768 EXPORT_SYMBOL(ib_sa_path_rec_get);
770 static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query,
772 struct ib_sa_mad *mad)
774 struct ib_sa_service_query *query =
775 container_of(sa_query, struct ib_sa_service_query, sa_query);
778 struct ib_sa_service_rec rec;
780 ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table),
782 query->callback(status, &rec, query->context);
784 query->callback(status, NULL, query->context);
787 static void ib_sa_service_rec_release(struct ib_sa_query *sa_query)
789 kfree(container_of(sa_query, struct ib_sa_service_query, sa_query));
793 * ib_sa_service_rec_query - Start Service Record operation
795 * @device:device to send request on
796 * @port_num: port number to send request on
797 * @method:SA method - should be get, set, or delete
798 * @rec:Service Record to send in request
799 * @comp_mask:component mask to send in request
800 * @timeout_ms:time to wait for response
801 * @gfp_mask:GFP mask to use for internal allocations
802 * @callback:function called when request completes, times out or is
804 * @context:opaque user context passed to callback
805 * @sa_query:request context, used to cancel request
807 * Send a Service Record set/get/delete to the SA to register,
808 * unregister or query a service record.
809 * The callback function will be called when the request completes (or
810 * fails); status is 0 for a successful response, -EINTR if the query
811 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
812 * occurred sending the query. The resp parameter of the callback is
813 * only valid if status is 0.
815 * If the return value of ib_sa_service_rec_query() is negative, it is an
816 * error code. Otherwise it is a request ID that can be used to cancel
819 int ib_sa_service_rec_query(struct ib_sa_client *client,
820 struct ib_device *device, u8 port_num, u8 method,
821 struct ib_sa_service_rec *rec,
822 ib_sa_comp_mask comp_mask,
823 int timeout_ms, gfp_t gfp_mask,
824 void (*callback)(int status,
825 struct ib_sa_service_rec *resp,
828 struct ib_sa_query **sa_query)
830 struct ib_sa_service_query *query;
831 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
832 struct ib_sa_port *port;
833 struct ib_mad_agent *agent;
834 struct ib_sa_mad *mad;
840 port = &sa_dev->port[port_num - sa_dev->start_port];
843 if (method != IB_MGMT_METHOD_GET &&
844 method != IB_MGMT_METHOD_SET &&
845 method != IB_SA_METHOD_DELETE)
848 query = kmalloc(sizeof *query, gfp_mask);
852 query->sa_query.port = port;
853 ret = alloc_mad(&query->sa_query, gfp_mask);
857 ib_sa_client_get(client);
858 query->sa_query.client = client;
859 query->callback = callback;
860 query->context = context;
862 mad = query->sa_query.mad_buf->mad;
863 init_mad(mad, agent);
865 query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL;
866 query->sa_query.release = ib_sa_service_rec_release;
867 mad->mad_hdr.method = method;
868 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_SERVICE_REC);
869 mad->sa_hdr.comp_mask = comp_mask;
871 ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table),
874 *sa_query = &query->sa_query;
876 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
884 ib_sa_client_put(query->sa_query.client);
885 free_mad(&query->sa_query);
891 EXPORT_SYMBOL(ib_sa_service_rec_query);
893 static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query,
895 struct ib_sa_mad *mad)
897 struct ib_sa_mcmember_query *query =
898 container_of(sa_query, struct ib_sa_mcmember_query, sa_query);
901 struct ib_sa_mcmember_rec rec;
903 ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
905 query->callback(status, &rec, query->context);
907 query->callback(status, NULL, query->context);
910 static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query)
912 kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query));
915 int ib_sa_mcmember_rec_query(struct ib_sa_client *client,
916 struct ib_device *device, u8 port_num,
918 struct ib_sa_mcmember_rec *rec,
919 ib_sa_comp_mask comp_mask,
920 int timeout_ms, gfp_t gfp_mask,
921 void (*callback)(int status,
922 struct ib_sa_mcmember_rec *resp,
925 struct ib_sa_query **sa_query)
927 struct ib_sa_mcmember_query *query;
928 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
929 struct ib_sa_port *port;
930 struct ib_mad_agent *agent;
931 struct ib_sa_mad *mad;
937 port = &sa_dev->port[port_num - sa_dev->start_port];
940 query = kmalloc(sizeof *query, gfp_mask);
944 query->sa_query.port = port;
945 ret = alloc_mad(&query->sa_query, gfp_mask);
949 ib_sa_client_get(client);
950 query->sa_query.client = client;
951 query->callback = callback;
952 query->context = context;
954 mad = query->sa_query.mad_buf->mad;
955 init_mad(mad, agent);
957 query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL;
958 query->sa_query.release = ib_sa_mcmember_rec_release;
959 mad->mad_hdr.method = method;
960 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC);
961 mad->sa_hdr.comp_mask = comp_mask;
963 ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
966 *sa_query = &query->sa_query;
968 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
976 ib_sa_client_put(query->sa_query.client);
977 free_mad(&query->sa_query);
984 /* Support GuidInfoRecord */
985 static void ib_sa_guidinfo_rec_callback(struct ib_sa_query *sa_query,
987 struct ib_sa_mad *mad)
989 struct ib_sa_guidinfo_query *query =
990 container_of(sa_query, struct ib_sa_guidinfo_query, sa_query);
993 struct ib_sa_guidinfo_rec rec;
995 ib_unpack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table),
997 query->callback(status, &rec, query->context);
999 query->callback(status, NULL, query->context);
1002 static void ib_sa_guidinfo_rec_release(struct ib_sa_query *sa_query)
1004 kfree(container_of(sa_query, struct ib_sa_guidinfo_query, sa_query));
1007 int ib_sa_guid_info_rec_query(struct ib_sa_client *client,
1008 struct ib_device *device, u8 port_num,
1009 struct ib_sa_guidinfo_rec *rec,
1010 ib_sa_comp_mask comp_mask, u8 method,
1011 int timeout_ms, gfp_t gfp_mask,
1012 void (*callback)(int status,
1013 struct ib_sa_guidinfo_rec *resp,
1016 struct ib_sa_query **sa_query)
1018 struct ib_sa_guidinfo_query *query;
1019 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1020 struct ib_sa_port *port;
1021 struct ib_mad_agent *agent;
1022 struct ib_sa_mad *mad;
1028 if (method != IB_MGMT_METHOD_GET &&
1029 method != IB_MGMT_METHOD_SET &&
1030 method != IB_SA_METHOD_DELETE) {
1034 port = &sa_dev->port[port_num - sa_dev->start_port];
1035 agent = port->agent;
1037 query = kmalloc(sizeof *query, gfp_mask);
1041 query->sa_query.port = port;
1042 ret = alloc_mad(&query->sa_query, gfp_mask);
1046 ib_sa_client_get(client);
1047 query->sa_query.client = client;
1048 query->callback = callback;
1049 query->context = context;
1051 mad = query->sa_query.mad_buf->mad;
1052 init_mad(mad, agent);
1054 query->sa_query.callback = callback ? ib_sa_guidinfo_rec_callback : NULL;
1055 query->sa_query.release = ib_sa_guidinfo_rec_release;
1057 mad->mad_hdr.method = method;
1058 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_GUID_INFO_REC);
1059 mad->sa_hdr.comp_mask = comp_mask;
1061 ib_pack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table), rec,
1064 *sa_query = &query->sa_query;
1066 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1074 ib_sa_client_put(query->sa_query.client);
1075 free_mad(&query->sa_query);
1081 EXPORT_SYMBOL(ib_sa_guid_info_rec_query);
1083 static void send_handler(struct ib_mad_agent *agent,
1084 struct ib_mad_send_wc *mad_send_wc)
1086 struct ib_sa_query *query = mad_send_wc->send_buf->context[0];
1087 unsigned long flags;
1089 if (query->callback)
1090 switch (mad_send_wc->status) {
1092 /* No callback -- already got recv */
1094 case IB_WC_RESP_TIMEOUT_ERR:
1095 query->callback(query, -ETIMEDOUT, NULL);
1097 case IB_WC_WR_FLUSH_ERR:
1098 query->callback(query, -EINTR, NULL);
1101 query->callback(query, -EIO, NULL);
1105 spin_lock_irqsave(&idr_lock, flags);
1106 idr_remove(&query_idr, query->id);
1107 spin_unlock_irqrestore(&idr_lock, flags);
1110 ib_sa_client_put(query->client);
1111 query->release(query);
1114 static void recv_handler(struct ib_mad_agent *mad_agent,
1115 struct ib_mad_recv_wc *mad_recv_wc)
1117 struct ib_sa_query *query;
1118 struct ib_mad_send_buf *mad_buf;
1120 mad_buf = (void *) (unsigned long) mad_recv_wc->wc->wr_id;
1121 query = mad_buf->context[0];
1123 if (query->callback) {
1124 if (mad_recv_wc->wc->status == IB_WC_SUCCESS)
1125 query->callback(query,
1126 mad_recv_wc->recv_buf.mad->mad_hdr.status ?
1128 (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad);
1130 query->callback(query, -EIO, NULL);
1133 ib_free_recv_mad(mad_recv_wc);
1136 static void ib_sa_add_one(struct ib_device *device)
1138 struct ib_sa_device *sa_dev;
1141 if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB)
1144 if (device->node_type == RDMA_NODE_IB_SWITCH)
1148 e = device->phys_port_cnt;
1151 sa_dev = kzalloc(sizeof *sa_dev +
1152 (e - s + 1) * sizeof (struct ib_sa_port),
1157 sa_dev->start_port = s;
1158 sa_dev->end_port = e;
1160 for (i = 0; i <= e - s; ++i) {
1161 spin_lock_init(&sa_dev->port[i].ah_lock);
1162 if (rdma_port_get_link_layer(device, i + 1) != IB_LINK_LAYER_INFINIBAND)
1165 sa_dev->port[i].sm_ah = NULL;
1166 sa_dev->port[i].port_num = i + s;
1168 sa_dev->port[i].agent =
1169 ib_register_mad_agent(device, i + s, IB_QPT_GSI,
1170 NULL, 0, send_handler,
1171 recv_handler, sa_dev);
1172 if (IS_ERR(sa_dev->port[i].agent))
1175 INIT_WORK(&sa_dev->port[i].update_task, update_sm_ah);
1178 ib_set_client_data(device, &sa_client, sa_dev);
1181 * We register our event handler after everything is set up,
1182 * and then update our cached info after the event handler is
1183 * registered to avoid any problems if a port changes state
1184 * during our initialization.
1187 INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event);
1188 if (ib_register_event_handler(&sa_dev->event_handler))
1191 for (i = 0; i <= e - s; ++i)
1192 if (rdma_port_get_link_layer(device, i + 1) == IB_LINK_LAYER_INFINIBAND)
1193 update_sm_ah(&sa_dev->port[i].update_task);
1199 if (rdma_port_get_link_layer(device, i + 1) == IB_LINK_LAYER_INFINIBAND)
1200 ib_unregister_mad_agent(sa_dev->port[i].agent);
1207 static void ib_sa_remove_one(struct ib_device *device)
1209 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1215 ib_unregister_event_handler(&sa_dev->event_handler);
1217 flush_workqueue(ib_wq);
1219 for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) {
1220 if (rdma_port_get_link_layer(device, i + 1) == IB_LINK_LAYER_INFINIBAND) {
1221 ib_unregister_mad_agent(sa_dev->port[i].agent);
1222 if (sa_dev->port[i].sm_ah)
1223 kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah);
1231 static int __init ib_sa_init(void)
1235 get_random_bytes(&tid, sizeof tid);
1237 ret = ib_register_client(&sa_client);
1239 printk(KERN_ERR "Couldn't register ib_sa client\n");
1245 printk(KERN_ERR "Couldn't initialize multicast handling\n");
1251 ib_unregister_client(&sa_client);
1256 static void __exit ib_sa_cleanup(void)
1259 ib_unregister_client(&sa_client);
1260 idr_destroy(&query_idr);
1263 module_init(ib_sa_init);
1264 module_exit(ib_sa_cleanup);