2 * Copyright (c) 2004 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Voltaire, Inc. All rights reserved.
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 * $Id: sa_query.c 2811 2005-07-06 18:11:43Z halr $
36 #include <linux/module.h>
37 #include <linux/init.h>
38 #include <linux/err.h>
39 #include <linux/random.h>
40 #include <linux/spinlock.h>
41 #include <linux/slab.h>
42 #include <linux/pci.h>
43 #include <linux/dma-mapping.h>
44 #include <linux/kref.h>
45 #include <linux/idr.h>
47 #include <rdma/ib_pack.h>
48 #include <rdma/ib_sa.h>
50 MODULE_AUTHOR("Roland Dreier");
51 MODULE_DESCRIPTION("InfiniBand subnet administration query support");
52 MODULE_LICENSE("Dual BSD/GPL");
60 struct ib_mad_agent *agent;
61 struct ib_sa_sm_ah *sm_ah;
62 struct work_struct update_task;
68 int start_port, end_port;
69 struct ib_event_handler event_handler;
70 struct ib_sa_port port[0];
74 void (*callback)(struct ib_sa_query *, int, struct ib_sa_mad *);
75 void (*release)(struct ib_sa_query *);
76 struct ib_sa_port *port;
77 struct ib_sa_mad *mad;
78 struct ib_sa_sm_ah *sm_ah;
79 DECLARE_PCI_UNMAP_ADDR(mapping)
83 struct ib_sa_service_query {
84 void (*callback)(int, struct ib_sa_service_rec *, void *);
86 struct ib_sa_query sa_query;
89 struct ib_sa_path_query {
90 void (*callback)(int, struct ib_sa_path_rec *, void *);
92 struct ib_sa_query sa_query;
95 struct ib_sa_mcmember_query {
96 void (*callback)(int, struct ib_sa_mcmember_rec *, void *);
98 struct ib_sa_query sa_query;
101 static void ib_sa_add_one(struct ib_device *device);
102 static void ib_sa_remove_one(struct ib_device *device);
104 static struct ib_client sa_client = {
106 .add = ib_sa_add_one,
107 .remove = ib_sa_remove_one
110 static spinlock_t idr_lock;
111 static DEFINE_IDR(query_idr);
113 static spinlock_t tid_lock;
116 #define PATH_REC_FIELD(field) \
117 .struct_offset_bytes = offsetof(struct ib_sa_path_rec, field), \
118 .struct_size_bytes = sizeof ((struct ib_sa_path_rec *) 0)->field, \
119 .field_name = "sa_path_rec:" #field
121 static const struct ib_field path_rec_table[] = {
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),
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(void *port_ptr)
362 struct ib_sa_port *port = port_ptr;
363 struct ib_sa_sm_ah *new_ah, *old_ah;
364 struct ib_port_attr port_attr;
365 struct ib_ah_attr ah_attr;
367 if (ib_query_port(port->agent->device, port->port_num, &port_attr)) {
368 printk(KERN_WARNING "Couldn't query port\n");
372 new_ah = kmalloc(sizeof *new_ah, GFP_KERNEL);
374 printk(KERN_WARNING "Couldn't allocate new SM AH\n");
378 kref_init(&new_ah->ref);
380 memset(&ah_attr, 0, sizeof ah_attr);
381 ah_attr.dlid = port_attr.sm_lid;
382 ah_attr.sl = port_attr.sm_sl;
383 ah_attr.port_num = port->port_num;
385 new_ah->ah = ib_create_ah(port->agent->qp->pd, &ah_attr);
386 if (IS_ERR(new_ah->ah)) {
387 printk(KERN_WARNING "Couldn't create new SM AH\n");
392 spin_lock_irq(&port->ah_lock);
393 old_ah = port->sm_ah;
394 port->sm_ah = new_ah;
395 spin_unlock_irq(&port->ah_lock);
398 kref_put(&old_ah->ref, free_sm_ah);
401 static void ib_sa_event(struct ib_event_handler *handler, struct ib_event *event)
403 if (event->event == IB_EVENT_PORT_ERR ||
404 event->event == IB_EVENT_PORT_ACTIVE ||
405 event->event == IB_EVENT_LID_CHANGE ||
406 event->event == IB_EVENT_PKEY_CHANGE ||
407 event->event == IB_EVENT_SM_CHANGE) {
408 struct ib_sa_device *sa_dev;
409 sa_dev = container_of(handler, typeof(*sa_dev), event_handler);
411 schedule_work(&sa_dev->port[event->element.port_num -
412 sa_dev->start_port].update_task);
417 * ib_sa_cancel_query - try to cancel an SA query
418 * @id:ID of query to cancel
419 * @query:query pointer to cancel
421 * Try to cancel an SA query. If the id and query don't match up or
422 * the query has already completed, nothing is done. Otherwise the
423 * query is canceled and will complete with a status of -EINTR.
425 void ib_sa_cancel_query(int id, struct ib_sa_query *query)
428 struct ib_mad_agent *agent;
430 spin_lock_irqsave(&idr_lock, flags);
431 if (idr_find(&query_idr, id) != query) {
432 spin_unlock_irqrestore(&idr_lock, flags);
435 agent = query->port->agent;
436 spin_unlock_irqrestore(&idr_lock, flags);
438 ib_cancel_mad(agent, id);
440 EXPORT_SYMBOL(ib_sa_cancel_query);
442 static void init_mad(struct ib_sa_mad *mad, struct ib_mad_agent *agent)
446 memset(mad, 0, sizeof *mad);
448 mad->mad_hdr.base_version = IB_MGMT_BASE_VERSION;
449 mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM;
450 mad->mad_hdr.class_version = IB_SA_CLASS_VERSION;
452 spin_lock_irqsave(&tid_lock, flags);
454 cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++);
455 spin_unlock_irqrestore(&tid_lock, flags);
458 static int send_mad(struct ib_sa_query *query, int timeout_ms)
460 struct ib_sa_port *port = query->port;
463 struct ib_sge gather_list;
464 struct ib_send_wr *bad_wr, wr = {
465 .opcode = IB_WR_SEND,
466 .sg_list = &gather_list,
468 .send_flags = IB_SEND_SIGNALED,
471 .mad_hdr = &query->mad->mad_hdr,
473 .remote_qkey = IB_QP1_QKEY,
474 .timeout_ms = timeout_ms,
480 if (!idr_pre_get(&query_idr, GFP_ATOMIC))
482 spin_lock_irqsave(&idr_lock, flags);
483 ret = idr_get_new(&query_idr, query, &query->id);
484 spin_unlock_irqrestore(&idr_lock, flags);
490 wr.wr_id = query->id;
492 spin_lock_irqsave(&port->ah_lock, flags);
493 kref_get(&port->sm_ah->ref);
494 query->sm_ah = port->sm_ah;
495 wr.wr.ud.ah = port->sm_ah->ah;
496 spin_unlock_irqrestore(&port->ah_lock, flags);
498 gather_list.addr = dma_map_single(port->agent->device->dma_device,
500 sizeof (struct ib_sa_mad),
502 gather_list.length = sizeof (struct ib_sa_mad);
503 gather_list.lkey = port->agent->mr->lkey;
504 pci_unmap_addr_set(query, mapping, gather_list.addr);
506 ret = ib_post_send_mad(port->agent, &wr, &bad_wr);
508 dma_unmap_single(port->agent->device->dma_device,
509 pci_unmap_addr(query, mapping),
510 sizeof (struct ib_sa_mad),
512 kref_put(&query->sm_ah->ref, free_sm_ah);
513 spin_lock_irqsave(&idr_lock, flags);
514 idr_remove(&query_idr, query->id);
515 spin_unlock_irqrestore(&idr_lock, flags);
519 * It's not safe to dereference query any more, because the
520 * send may already have completed and freed the query in
521 * another context. So use wr.wr_id, which has a copy of the
524 return ret ? ret : wr.wr_id;
527 static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query,
529 struct ib_sa_mad *mad)
531 struct ib_sa_path_query *query =
532 container_of(sa_query, struct ib_sa_path_query, sa_query);
535 struct ib_sa_path_rec rec;
537 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table),
539 query->callback(status, &rec, query->context);
541 query->callback(status, NULL, query->context);
544 static void ib_sa_path_rec_release(struct ib_sa_query *sa_query)
546 kfree(sa_query->mad);
547 kfree(container_of(sa_query, struct ib_sa_path_query, sa_query));
551 * ib_sa_path_rec_get - Start a Path get query
552 * @device:device to send query on
553 * @port_num: port number to send query on
554 * @rec:Path Record to send in query
555 * @comp_mask:component mask to send in query
556 * @timeout_ms:time to wait for response
557 * @gfp_mask:GFP mask to use for internal allocations
558 * @callback:function called when query completes, times out or is
560 * @context:opaque user context passed to callback
561 * @sa_query:query context, used to cancel query
563 * Send a Path Record Get query to the SA to look up a path. The
564 * callback function will be called when the query completes (or
565 * fails); status is 0 for a successful response, -EINTR if the query
566 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
567 * occurred sending the query. The resp parameter of the callback is
568 * only valid if status is 0.
570 * If the return value of ib_sa_path_rec_get() is negative, it is an
571 * error code. Otherwise it is a query ID that can be used to cancel
574 int ib_sa_path_rec_get(struct ib_device *device, u8 port_num,
575 struct ib_sa_path_rec *rec,
576 ib_sa_comp_mask comp_mask,
577 int timeout_ms, unsigned int __nocast gfp_mask,
578 void (*callback)(int status,
579 struct ib_sa_path_rec *resp,
582 struct ib_sa_query **sa_query)
584 struct ib_sa_path_query *query;
585 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
586 struct ib_sa_port *port = &sa_dev->port[port_num - sa_dev->start_port];
587 struct ib_mad_agent *agent = port->agent;
590 query = kmalloc(sizeof *query, gfp_mask);
593 query->sa_query.mad = kmalloc(sizeof *query->sa_query.mad, gfp_mask);
594 if (!query->sa_query.mad) {
599 query->callback = callback;
600 query->context = context;
602 init_mad(query->sa_query.mad, agent);
604 query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL;
605 query->sa_query.release = ib_sa_path_rec_release;
606 query->sa_query.port = port;
607 query->sa_query.mad->mad_hdr.method = IB_MGMT_METHOD_GET;
608 query->sa_query.mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC);
609 query->sa_query.mad->sa_hdr.comp_mask = comp_mask;
611 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table),
612 rec, query->sa_query.mad->data);
614 *sa_query = &query->sa_query;
616 ret = send_mad(&query->sa_query, timeout_ms);
619 kfree(query->sa_query.mad);
625 EXPORT_SYMBOL(ib_sa_path_rec_get);
627 static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query,
629 struct ib_sa_mad *mad)
631 struct ib_sa_service_query *query =
632 container_of(sa_query, struct ib_sa_service_query, sa_query);
635 struct ib_sa_service_rec rec;
637 ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table),
639 query->callback(status, &rec, query->context);
641 query->callback(status, NULL, query->context);
644 static void ib_sa_service_rec_release(struct ib_sa_query *sa_query)
646 kfree(sa_query->mad);
647 kfree(container_of(sa_query, struct ib_sa_service_query, sa_query));
651 * ib_sa_service_rec_query - Start Service Record operation
652 * @device:device to send request on
653 * @port_num: port number to send request on
654 * @method:SA method - should be get, set, or delete
655 * @rec:Service Record to send in request
656 * @comp_mask:component mask to send in request
657 * @timeout_ms:time to wait for response
658 * @gfp_mask:GFP mask to use for internal allocations
659 * @callback:function called when request completes, times out or is
661 * @context:opaque user context passed to callback
662 * @sa_query:request context, used to cancel request
664 * Send a Service Record set/get/delete to the SA to register,
665 * unregister or query a service record.
666 * The callback function will be called when the request completes (or
667 * fails); status is 0 for a successful response, -EINTR if the query
668 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
669 * occurred sending the query. The resp parameter of the callback is
670 * only valid if status is 0.
672 * If the return value of ib_sa_service_rec_query() is negative, it is an
673 * error code. Otherwise it is a request ID that can be used to cancel
676 int ib_sa_service_rec_query(struct ib_device *device, u8 port_num, u8 method,
677 struct ib_sa_service_rec *rec,
678 ib_sa_comp_mask comp_mask,
679 int timeout_ms, unsigned int __nocast gfp_mask,
680 void (*callback)(int status,
681 struct ib_sa_service_rec *resp,
684 struct ib_sa_query **sa_query)
686 struct ib_sa_service_query *query;
687 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
688 struct ib_sa_port *port = &sa_dev->port[port_num - sa_dev->start_port];
689 struct ib_mad_agent *agent = port->agent;
692 if (method != IB_MGMT_METHOD_GET &&
693 method != IB_MGMT_METHOD_SET &&
694 method != IB_SA_METHOD_DELETE)
697 query = kmalloc(sizeof *query, gfp_mask);
700 query->sa_query.mad = kmalloc(sizeof *query->sa_query.mad, gfp_mask);
701 if (!query->sa_query.mad) {
706 query->callback = callback;
707 query->context = context;
709 init_mad(query->sa_query.mad, agent);
711 query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL;
712 query->sa_query.release = ib_sa_service_rec_release;
713 query->sa_query.port = port;
714 query->sa_query.mad->mad_hdr.method = method;
715 query->sa_query.mad->mad_hdr.attr_id =
716 cpu_to_be16(IB_SA_ATTR_SERVICE_REC);
717 query->sa_query.mad->sa_hdr.comp_mask = comp_mask;
719 ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table),
720 rec, query->sa_query.mad->data);
722 *sa_query = &query->sa_query;
724 ret = send_mad(&query->sa_query, timeout_ms);
727 kfree(query->sa_query.mad);
733 EXPORT_SYMBOL(ib_sa_service_rec_query);
735 static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query,
737 struct ib_sa_mad *mad)
739 struct ib_sa_mcmember_query *query =
740 container_of(sa_query, struct ib_sa_mcmember_query, sa_query);
743 struct ib_sa_mcmember_rec rec;
745 ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
747 query->callback(status, &rec, query->context);
749 query->callback(status, NULL, query->context);
752 static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query)
754 kfree(sa_query->mad);
755 kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query));
758 int ib_sa_mcmember_rec_query(struct ib_device *device, u8 port_num,
760 struct ib_sa_mcmember_rec *rec,
761 ib_sa_comp_mask comp_mask,
762 int timeout_ms, unsigned int __nocast gfp_mask,
763 void (*callback)(int status,
764 struct ib_sa_mcmember_rec *resp,
767 struct ib_sa_query **sa_query)
769 struct ib_sa_mcmember_query *query;
770 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
771 struct ib_sa_port *port = &sa_dev->port[port_num - sa_dev->start_port];
772 struct ib_mad_agent *agent = port->agent;
775 query = kmalloc(sizeof *query, gfp_mask);
778 query->sa_query.mad = kmalloc(sizeof *query->sa_query.mad, gfp_mask);
779 if (!query->sa_query.mad) {
784 query->callback = callback;
785 query->context = context;
787 init_mad(query->sa_query.mad, agent);
789 query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL;
790 query->sa_query.release = ib_sa_mcmember_rec_release;
791 query->sa_query.port = port;
792 query->sa_query.mad->mad_hdr.method = method;
793 query->sa_query.mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC);
794 query->sa_query.mad->sa_hdr.comp_mask = comp_mask;
796 ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
797 rec, query->sa_query.mad->data);
799 *sa_query = &query->sa_query;
801 ret = send_mad(&query->sa_query, timeout_ms);
804 kfree(query->sa_query.mad);
810 EXPORT_SYMBOL(ib_sa_mcmember_rec_query);
812 static void send_handler(struct ib_mad_agent *agent,
813 struct ib_mad_send_wc *mad_send_wc)
815 struct ib_sa_query *query;
818 spin_lock_irqsave(&idr_lock, flags);
819 query = idr_find(&query_idr, mad_send_wc->wr_id);
820 spin_unlock_irqrestore(&idr_lock, flags);
826 switch (mad_send_wc->status) {
828 /* No callback -- already got recv */
830 case IB_WC_RESP_TIMEOUT_ERR:
831 query->callback(query, -ETIMEDOUT, NULL);
833 case IB_WC_WR_FLUSH_ERR:
834 query->callback(query, -EINTR, NULL);
837 query->callback(query, -EIO, NULL);
841 dma_unmap_single(agent->device->dma_device,
842 pci_unmap_addr(query, mapping),
843 sizeof (struct ib_sa_mad),
845 kref_put(&query->sm_ah->ref, free_sm_ah);
847 query->release(query);
849 spin_lock_irqsave(&idr_lock, flags);
850 idr_remove(&query_idr, mad_send_wc->wr_id);
851 spin_unlock_irqrestore(&idr_lock, flags);
854 static void recv_handler(struct ib_mad_agent *mad_agent,
855 struct ib_mad_recv_wc *mad_recv_wc)
857 struct ib_sa_query *query;
860 spin_lock_irqsave(&idr_lock, flags);
861 query = idr_find(&query_idr, mad_recv_wc->wc->wr_id);
862 spin_unlock_irqrestore(&idr_lock, flags);
864 if (query && query->callback) {
865 if (mad_recv_wc->wc->status == IB_WC_SUCCESS)
866 query->callback(query,
867 mad_recv_wc->recv_buf.mad->mad_hdr.status ?
869 (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad);
871 query->callback(query, -EIO, NULL);
874 ib_free_recv_mad(mad_recv_wc);
877 static void ib_sa_add_one(struct ib_device *device)
879 struct ib_sa_device *sa_dev;
882 if (device->node_type == IB_NODE_SWITCH)
886 e = device->phys_port_cnt;
889 sa_dev = kmalloc(sizeof *sa_dev +
890 (e - s + 1) * sizeof (struct ib_sa_port),
895 sa_dev->start_port = s;
896 sa_dev->end_port = e;
898 for (i = 0; i <= e - s; ++i) {
899 sa_dev->port[i].sm_ah = NULL;
900 sa_dev->port[i].port_num = i + s;
901 spin_lock_init(&sa_dev->port[i].ah_lock);
903 sa_dev->port[i].agent =
904 ib_register_mad_agent(device, i + s, IB_QPT_GSI,
905 NULL, 0, send_handler,
906 recv_handler, sa_dev);
907 if (IS_ERR(sa_dev->port[i].agent))
910 INIT_WORK(&sa_dev->port[i].update_task,
911 update_sm_ah, &sa_dev->port[i]);
914 ib_set_client_data(device, &sa_client, sa_dev);
917 * We register our event handler after everything is set up,
918 * and then update our cached info after the event handler is
919 * registered to avoid any problems if a port changes state
920 * during our initialization.
923 INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event);
924 if (ib_register_event_handler(&sa_dev->event_handler))
927 for (i = 0; i <= e - s; ++i)
928 update_sm_ah(&sa_dev->port[i]);
934 ib_unregister_mad_agent(sa_dev->port[i].agent);
941 static void ib_sa_remove_one(struct ib_device *device)
943 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
949 ib_unregister_event_handler(&sa_dev->event_handler);
951 for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) {
952 ib_unregister_mad_agent(sa_dev->port[i].agent);
953 kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah);
959 static int __init ib_sa_init(void)
963 spin_lock_init(&idr_lock);
964 spin_lock_init(&tid_lock);
966 get_random_bytes(&tid, sizeof tid);
968 ret = ib_register_client(&sa_client);
970 printk(KERN_ERR "Couldn't register ib_sa client\n");
975 static void __exit ib_sa_cleanup(void)
977 ib_unregister_client(&sa_client);
980 module_init(ib_sa_init);
981 module_exit(ib_sa_cleanup);