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[] = {
126 { PATH_REC_FIELD(service_id),
130 { PATH_REC_FIELD(dgid),
134 { PATH_REC_FIELD(sgid),
138 { PATH_REC_FIELD(dlid),
142 { PATH_REC_FIELD(slid),
146 { PATH_REC_FIELD(raw_traffic),
154 { PATH_REC_FIELD(flow_label),
158 { PATH_REC_FIELD(hop_limit),
162 { PATH_REC_FIELD(traffic_class),
166 { PATH_REC_FIELD(reversible),
170 { PATH_REC_FIELD(numb_path),
174 { PATH_REC_FIELD(pkey),
178 { PATH_REC_FIELD(qos_class),
182 { PATH_REC_FIELD(sl),
186 { PATH_REC_FIELD(mtu_selector),
190 { PATH_REC_FIELD(mtu),
194 { PATH_REC_FIELD(rate_selector),
198 { PATH_REC_FIELD(rate),
202 { PATH_REC_FIELD(packet_life_time_selector),
206 { PATH_REC_FIELD(packet_life_time),
210 { PATH_REC_FIELD(preference),
220 #define MCMEMBER_REC_FIELD(field) \
221 .struct_offset_bytes = offsetof(struct ib_sa_mcmember_rec, field), \
222 .struct_size_bytes = sizeof ((struct ib_sa_mcmember_rec *) 0)->field, \
223 .field_name = "sa_mcmember_rec:" #field
225 static const struct ib_field mcmember_rec_table[] = {
226 { MCMEMBER_REC_FIELD(mgid),
230 { MCMEMBER_REC_FIELD(port_gid),
234 { MCMEMBER_REC_FIELD(qkey),
238 { MCMEMBER_REC_FIELD(mlid),
242 { MCMEMBER_REC_FIELD(mtu_selector),
246 { MCMEMBER_REC_FIELD(mtu),
250 { MCMEMBER_REC_FIELD(traffic_class),
254 { MCMEMBER_REC_FIELD(pkey),
258 { MCMEMBER_REC_FIELD(rate_selector),
262 { MCMEMBER_REC_FIELD(rate),
266 { MCMEMBER_REC_FIELD(packet_life_time_selector),
270 { MCMEMBER_REC_FIELD(packet_life_time),
274 { MCMEMBER_REC_FIELD(sl),
278 { MCMEMBER_REC_FIELD(flow_label),
282 { MCMEMBER_REC_FIELD(hop_limit),
286 { MCMEMBER_REC_FIELD(scope),
290 { MCMEMBER_REC_FIELD(join_state),
294 { MCMEMBER_REC_FIELD(proxy_join),
304 #define SERVICE_REC_FIELD(field) \
305 .struct_offset_bytes = offsetof(struct ib_sa_service_rec, field), \
306 .struct_size_bytes = sizeof ((struct ib_sa_service_rec *) 0)->field, \
307 .field_name = "sa_service_rec:" #field
309 static const struct ib_field service_rec_table[] = {
310 { SERVICE_REC_FIELD(id),
314 { SERVICE_REC_FIELD(gid),
318 { SERVICE_REC_FIELD(pkey),
322 { SERVICE_REC_FIELD(lease),
326 { SERVICE_REC_FIELD(key),
330 { SERVICE_REC_FIELD(name),
334 { SERVICE_REC_FIELD(data8),
338 { SERVICE_REC_FIELD(data16),
342 { SERVICE_REC_FIELD(data32),
346 { SERVICE_REC_FIELD(data64),
352 static void free_sm_ah(struct kref *kref)
354 struct ib_sa_sm_ah *sm_ah = container_of(kref, struct ib_sa_sm_ah, ref);
356 ib_destroy_ah(sm_ah->ah);
360 static void update_sm_ah(struct work_struct *work)
362 struct ib_sa_port *port =
363 container_of(work, struct ib_sa_port, update_task);
364 struct ib_sa_sm_ah *new_ah, *old_ah;
365 struct ib_port_attr port_attr;
366 struct ib_ah_attr ah_attr;
368 if (ib_query_port(port->agent->device, port->port_num, &port_attr)) {
369 printk(KERN_WARNING "Couldn't query port\n");
373 new_ah = kmalloc(sizeof *new_ah, GFP_KERNEL);
375 printk(KERN_WARNING "Couldn't allocate new SM AH\n");
379 kref_init(&new_ah->ref);
380 new_ah->src_path_mask = (1 << port_attr.lmc) - 1;
382 new_ah->pkey_index = 0;
383 if (ib_find_pkey(port->agent->device, port->port_num,
384 IB_DEFAULT_PKEY_FULL, &new_ah->pkey_index))
385 printk(KERN_ERR "Couldn't find index for default PKey\n");
387 memset(&ah_attr, 0, sizeof ah_attr);
388 ah_attr.dlid = port_attr.sm_lid;
389 ah_attr.sl = port_attr.sm_sl;
390 ah_attr.port_num = port->port_num;
392 new_ah->ah = ib_create_ah(port->agent->qp->pd, &ah_attr);
393 if (IS_ERR(new_ah->ah)) {
394 printk(KERN_WARNING "Couldn't create new SM AH\n");
399 spin_lock_irq(&port->ah_lock);
400 old_ah = port->sm_ah;
401 port->sm_ah = new_ah;
402 spin_unlock_irq(&port->ah_lock);
405 kref_put(&old_ah->ref, free_sm_ah);
408 static void ib_sa_event(struct ib_event_handler *handler, struct ib_event *event)
410 if (event->event == IB_EVENT_PORT_ERR ||
411 event->event == IB_EVENT_PORT_ACTIVE ||
412 event->event == IB_EVENT_LID_CHANGE ||
413 event->event == IB_EVENT_PKEY_CHANGE ||
414 event->event == IB_EVENT_SM_CHANGE ||
415 event->event == IB_EVENT_CLIENT_REREGISTER) {
416 struct ib_sa_device *sa_dev;
417 sa_dev = container_of(handler, typeof(*sa_dev), event_handler);
419 schedule_work(&sa_dev->port[event->element.port_num -
420 sa_dev->start_port].update_task);
424 void ib_sa_register_client(struct ib_sa_client *client)
426 atomic_set(&client->users, 1);
427 init_completion(&client->comp);
429 EXPORT_SYMBOL(ib_sa_register_client);
431 void ib_sa_unregister_client(struct ib_sa_client *client)
433 ib_sa_client_put(client);
434 wait_for_completion(&client->comp);
436 EXPORT_SYMBOL(ib_sa_unregister_client);
439 * ib_sa_cancel_query - try to cancel an SA query
440 * @id:ID of query to cancel
441 * @query:query pointer to cancel
443 * Try to cancel an SA query. If the id and query don't match up or
444 * the query has already completed, nothing is done. Otherwise the
445 * query is canceled and will complete with a status of -EINTR.
447 void ib_sa_cancel_query(int id, struct ib_sa_query *query)
450 struct ib_mad_agent *agent;
451 struct ib_mad_send_buf *mad_buf;
453 spin_lock_irqsave(&idr_lock, flags);
454 if (idr_find(&query_idr, id) != query) {
455 spin_unlock_irqrestore(&idr_lock, flags);
458 agent = query->port->agent;
459 mad_buf = query->mad_buf;
460 spin_unlock_irqrestore(&idr_lock, flags);
462 ib_cancel_mad(agent, mad_buf);
464 EXPORT_SYMBOL(ib_sa_cancel_query);
466 static u8 get_src_path_mask(struct ib_device *device, u8 port_num)
468 struct ib_sa_device *sa_dev;
469 struct ib_sa_port *port;
473 sa_dev = ib_get_client_data(device, &sa_client);
477 port = &sa_dev->port[port_num - sa_dev->start_port];
478 spin_lock_irqsave(&port->ah_lock, flags);
479 src_path_mask = port->sm_ah ? port->sm_ah->src_path_mask : 0x7f;
480 spin_unlock_irqrestore(&port->ah_lock, flags);
482 return src_path_mask;
485 int ib_init_ah_from_path(struct ib_device *device, u8 port_num,
486 struct ib_sa_path_rec *rec, struct ib_ah_attr *ah_attr)
491 memset(ah_attr, 0, sizeof *ah_attr);
492 ah_attr->dlid = be16_to_cpu(rec->dlid);
493 ah_attr->sl = rec->sl;
494 ah_attr->src_path_bits = be16_to_cpu(rec->slid) &
495 get_src_path_mask(device, port_num);
496 ah_attr->port_num = port_num;
497 ah_attr->static_rate = rec->rate;
499 if (rec->hop_limit > 1) {
500 ah_attr->ah_flags = IB_AH_GRH;
501 ah_attr->grh.dgid = rec->dgid;
503 ret = ib_find_cached_gid(device, &rec->sgid, &port_num,
508 ah_attr->grh.sgid_index = gid_index;
509 ah_attr->grh.flow_label = be32_to_cpu(rec->flow_label);
510 ah_attr->grh.hop_limit = rec->hop_limit;
511 ah_attr->grh.traffic_class = rec->traffic_class;
515 EXPORT_SYMBOL(ib_init_ah_from_path);
517 static int alloc_mad(struct ib_sa_query *query, gfp_t gfp_mask)
521 spin_lock_irqsave(&query->port->ah_lock, flags);
522 kref_get(&query->port->sm_ah->ref);
523 query->sm_ah = query->port->sm_ah;
524 spin_unlock_irqrestore(&query->port->ah_lock, flags);
526 query->mad_buf = ib_create_send_mad(query->port->agent, 1,
527 query->sm_ah->pkey_index,
528 0, IB_MGMT_SA_HDR, IB_MGMT_SA_DATA,
530 if (IS_ERR(query->mad_buf)) {
531 kref_put(&query->sm_ah->ref, free_sm_ah);
535 query->mad_buf->ah = query->sm_ah->ah;
540 static void free_mad(struct ib_sa_query *query)
542 ib_free_send_mad(query->mad_buf);
543 kref_put(&query->sm_ah->ref, free_sm_ah);
546 static void init_mad(struct ib_sa_mad *mad, struct ib_mad_agent *agent)
550 memset(mad, 0, sizeof *mad);
552 mad->mad_hdr.base_version = IB_MGMT_BASE_VERSION;
553 mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM;
554 mad->mad_hdr.class_version = IB_SA_CLASS_VERSION;
556 spin_lock_irqsave(&tid_lock, flags);
558 cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++);
559 spin_unlock_irqrestore(&tid_lock, flags);
562 static int send_mad(struct ib_sa_query *query, int timeout_ms, gfp_t gfp_mask)
568 if (!idr_pre_get(&query_idr, gfp_mask))
570 spin_lock_irqsave(&idr_lock, flags);
571 ret = idr_get_new(&query_idr, query, &id);
572 spin_unlock_irqrestore(&idr_lock, flags);
578 query->mad_buf->timeout_ms = timeout_ms;
579 query->mad_buf->context[0] = query;
582 ret = ib_post_send_mad(query->mad_buf, NULL);
584 spin_lock_irqsave(&idr_lock, flags);
585 idr_remove(&query_idr, id);
586 spin_unlock_irqrestore(&idr_lock, flags);
590 * It's not safe to dereference query any more, because the
591 * send may already have completed and freed the query in
594 return ret ? ret : id;
597 static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query,
599 struct ib_sa_mad *mad)
601 struct ib_sa_path_query *query =
602 container_of(sa_query, struct ib_sa_path_query, sa_query);
605 struct ib_sa_path_rec rec;
607 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table),
609 query->callback(status, &rec, query->context);
611 query->callback(status, NULL, query->context);
614 static void ib_sa_path_rec_release(struct ib_sa_query *sa_query)
616 kfree(container_of(sa_query, struct ib_sa_path_query, sa_query));
620 * ib_sa_path_rec_get - Start a Path get query
622 * @device:device to send query on
623 * @port_num: port number to send query on
624 * @rec:Path Record to send in query
625 * @comp_mask:component mask to send in query
626 * @timeout_ms:time to wait for response
627 * @gfp_mask:GFP mask to use for internal allocations
628 * @callback:function called when query completes, times out or is
630 * @context:opaque user context passed to callback
631 * @sa_query:query context, used to cancel query
633 * Send a Path Record Get query to the SA to look up a path. The
634 * callback function will be called when the query completes (or
635 * fails); status is 0 for a successful response, -EINTR if the query
636 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
637 * occurred sending the query. The resp parameter of the callback is
638 * only valid if status is 0.
640 * If the return value of ib_sa_path_rec_get() is negative, it is an
641 * error code. Otherwise it is a query ID that can be used to cancel
644 int ib_sa_path_rec_get(struct ib_sa_client *client,
645 struct ib_device *device, u8 port_num,
646 struct ib_sa_path_rec *rec,
647 ib_sa_comp_mask comp_mask,
648 int timeout_ms, gfp_t gfp_mask,
649 void (*callback)(int status,
650 struct ib_sa_path_rec *resp,
653 struct ib_sa_query **sa_query)
655 struct ib_sa_path_query *query;
656 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
657 struct ib_sa_port *port;
658 struct ib_mad_agent *agent;
659 struct ib_sa_mad *mad;
665 port = &sa_dev->port[port_num - sa_dev->start_port];
668 query = kmalloc(sizeof *query, gfp_mask);
672 query->sa_query.port = port;
673 ret = alloc_mad(&query->sa_query, gfp_mask);
677 ib_sa_client_get(client);
678 query->sa_query.client = client;
679 query->callback = callback;
680 query->context = context;
682 mad = query->sa_query.mad_buf->mad;
683 init_mad(mad, agent);
685 query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL;
686 query->sa_query.release = ib_sa_path_rec_release;
687 mad->mad_hdr.method = IB_MGMT_METHOD_GET;
688 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC);
689 mad->sa_hdr.comp_mask = comp_mask;
691 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, mad->data);
693 *sa_query = &query->sa_query;
695 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
703 ib_sa_client_put(query->sa_query.client);
704 free_mad(&query->sa_query);
710 EXPORT_SYMBOL(ib_sa_path_rec_get);
712 static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query,
714 struct ib_sa_mad *mad)
716 struct ib_sa_service_query *query =
717 container_of(sa_query, struct ib_sa_service_query, sa_query);
720 struct ib_sa_service_rec rec;
722 ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table),
724 query->callback(status, &rec, query->context);
726 query->callback(status, NULL, query->context);
729 static void ib_sa_service_rec_release(struct ib_sa_query *sa_query)
731 kfree(container_of(sa_query, struct ib_sa_service_query, sa_query));
735 * ib_sa_service_rec_query - Start Service Record operation
737 * @device:device to send request on
738 * @port_num: port number to send request on
739 * @method:SA method - should be get, set, or delete
740 * @rec:Service Record to send in request
741 * @comp_mask:component mask to send in request
742 * @timeout_ms:time to wait for response
743 * @gfp_mask:GFP mask to use for internal allocations
744 * @callback:function called when request completes, times out or is
746 * @context:opaque user context passed to callback
747 * @sa_query:request context, used to cancel request
749 * Send a Service Record set/get/delete to the SA to register,
750 * unregister or query a service record.
751 * The callback function will be called when the request completes (or
752 * fails); status is 0 for a successful response, -EINTR if the query
753 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
754 * occurred sending the query. The resp parameter of the callback is
755 * only valid if status is 0.
757 * If the return value of ib_sa_service_rec_query() is negative, it is an
758 * error code. Otherwise it is a request ID that can be used to cancel
761 int ib_sa_service_rec_query(struct ib_sa_client *client,
762 struct ib_device *device, u8 port_num, u8 method,
763 struct ib_sa_service_rec *rec,
764 ib_sa_comp_mask comp_mask,
765 int timeout_ms, gfp_t gfp_mask,
766 void (*callback)(int status,
767 struct ib_sa_service_rec *resp,
770 struct ib_sa_query **sa_query)
772 struct ib_sa_service_query *query;
773 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
774 struct ib_sa_port *port;
775 struct ib_mad_agent *agent;
776 struct ib_sa_mad *mad;
782 port = &sa_dev->port[port_num - sa_dev->start_port];
785 if (method != IB_MGMT_METHOD_GET &&
786 method != IB_MGMT_METHOD_SET &&
787 method != IB_SA_METHOD_DELETE)
790 query = kmalloc(sizeof *query, gfp_mask);
794 query->sa_query.port = port;
795 ret = alloc_mad(&query->sa_query, gfp_mask);
799 ib_sa_client_get(client);
800 query->sa_query.client = client;
801 query->callback = callback;
802 query->context = context;
804 mad = query->sa_query.mad_buf->mad;
805 init_mad(mad, agent);
807 query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL;
808 query->sa_query.release = ib_sa_service_rec_release;
809 mad->mad_hdr.method = method;
810 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_SERVICE_REC);
811 mad->sa_hdr.comp_mask = comp_mask;
813 ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table),
816 *sa_query = &query->sa_query;
818 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
826 ib_sa_client_put(query->sa_query.client);
827 free_mad(&query->sa_query);
833 EXPORT_SYMBOL(ib_sa_service_rec_query);
835 static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query,
837 struct ib_sa_mad *mad)
839 struct ib_sa_mcmember_query *query =
840 container_of(sa_query, struct ib_sa_mcmember_query, sa_query);
843 struct ib_sa_mcmember_rec rec;
845 ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
847 query->callback(status, &rec, query->context);
849 query->callback(status, NULL, query->context);
852 static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query)
854 kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query));
857 int ib_sa_mcmember_rec_query(struct ib_sa_client *client,
858 struct ib_device *device, u8 port_num,
860 struct ib_sa_mcmember_rec *rec,
861 ib_sa_comp_mask comp_mask,
862 int timeout_ms, gfp_t gfp_mask,
863 void (*callback)(int status,
864 struct ib_sa_mcmember_rec *resp,
867 struct ib_sa_query **sa_query)
869 struct ib_sa_mcmember_query *query;
870 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
871 struct ib_sa_port *port;
872 struct ib_mad_agent *agent;
873 struct ib_sa_mad *mad;
879 port = &sa_dev->port[port_num - sa_dev->start_port];
882 query = kmalloc(sizeof *query, gfp_mask);
886 query->sa_query.port = port;
887 ret = alloc_mad(&query->sa_query, gfp_mask);
891 ib_sa_client_get(client);
892 query->sa_query.client = client;
893 query->callback = callback;
894 query->context = context;
896 mad = query->sa_query.mad_buf->mad;
897 init_mad(mad, agent);
899 query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL;
900 query->sa_query.release = ib_sa_mcmember_rec_release;
901 mad->mad_hdr.method = method;
902 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC);
903 mad->sa_hdr.comp_mask = comp_mask;
905 ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
908 *sa_query = &query->sa_query;
910 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
918 ib_sa_client_put(query->sa_query.client);
919 free_mad(&query->sa_query);
926 static void send_handler(struct ib_mad_agent *agent,
927 struct ib_mad_send_wc *mad_send_wc)
929 struct ib_sa_query *query = mad_send_wc->send_buf->context[0];
933 switch (mad_send_wc->status) {
935 /* No callback -- already got recv */
937 case IB_WC_RESP_TIMEOUT_ERR:
938 query->callback(query, -ETIMEDOUT, NULL);
940 case IB_WC_WR_FLUSH_ERR:
941 query->callback(query, -EINTR, NULL);
944 query->callback(query, -EIO, NULL);
948 spin_lock_irqsave(&idr_lock, flags);
949 idr_remove(&query_idr, query->id);
950 spin_unlock_irqrestore(&idr_lock, flags);
953 ib_sa_client_put(query->client);
954 query->release(query);
957 static void recv_handler(struct ib_mad_agent *mad_agent,
958 struct ib_mad_recv_wc *mad_recv_wc)
960 struct ib_sa_query *query;
961 struct ib_mad_send_buf *mad_buf;
963 mad_buf = (void *) (unsigned long) mad_recv_wc->wc->wr_id;
964 query = mad_buf->context[0];
966 if (query->callback) {
967 if (mad_recv_wc->wc->status == IB_WC_SUCCESS)
968 query->callback(query,
969 mad_recv_wc->recv_buf.mad->mad_hdr.status ?
971 (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad);
973 query->callback(query, -EIO, NULL);
976 ib_free_recv_mad(mad_recv_wc);
979 static void ib_sa_add_one(struct ib_device *device)
981 struct ib_sa_device *sa_dev;
984 if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB)
987 if (device->node_type == RDMA_NODE_IB_SWITCH)
991 e = device->phys_port_cnt;
994 sa_dev = kmalloc(sizeof *sa_dev +
995 (e - s + 1) * sizeof (struct ib_sa_port),
1000 sa_dev->start_port = s;
1001 sa_dev->end_port = e;
1003 for (i = 0; i <= e - s; ++i) {
1004 sa_dev->port[i].sm_ah = NULL;
1005 sa_dev->port[i].port_num = i + s;
1006 spin_lock_init(&sa_dev->port[i].ah_lock);
1008 sa_dev->port[i].agent =
1009 ib_register_mad_agent(device, i + s, IB_QPT_GSI,
1010 NULL, 0, send_handler,
1011 recv_handler, sa_dev);
1012 if (IS_ERR(sa_dev->port[i].agent))
1015 INIT_WORK(&sa_dev->port[i].update_task, update_sm_ah);
1018 ib_set_client_data(device, &sa_client, sa_dev);
1021 * We register our event handler after everything is set up,
1022 * and then update our cached info after the event handler is
1023 * registered to avoid any problems if a port changes state
1024 * during our initialization.
1027 INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event);
1028 if (ib_register_event_handler(&sa_dev->event_handler))
1031 for (i = 0; i <= e - s; ++i)
1032 update_sm_ah(&sa_dev->port[i].update_task);
1038 ib_unregister_mad_agent(sa_dev->port[i].agent);
1045 static void ib_sa_remove_one(struct ib_device *device)
1047 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1053 ib_unregister_event_handler(&sa_dev->event_handler);
1055 flush_scheduled_work();
1057 for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) {
1058 ib_unregister_mad_agent(sa_dev->port[i].agent);
1059 kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah);
1065 static int __init ib_sa_init(void)
1069 spin_lock_init(&idr_lock);
1070 spin_lock_init(&tid_lock);
1072 get_random_bytes(&tid, sizeof tid);
1074 ret = ib_register_client(&sa_client);
1076 printk(KERN_ERR "Couldn't register ib_sa client\n");
1082 printk(KERN_ERR "Couldn't initialize multicast handling\n");
1088 ib_unregister_client(&sa_client);
1093 static void __exit ib_sa_cleanup(void)
1096 ib_unregister_client(&sa_client);
1097 idr_destroy(&query_idr);
1100 module_init(ib_sa_init);
1101 module_exit(ib_sa_cleanup);