2 * Copyright (c) 2004 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Voltaire, Inc. All rights reserved.
4 * Copyright (c) 2006 Intel Corporation. All rights reserved.
6 * This software is available to you under a choice of one of two
7 * licenses. You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials
23 * provided with the distribution.
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
34 * $Id: sa_query.c 2811 2005-07-06 18:11:43Z halr $
37 #include <linux/module.h>
38 #include <linux/init.h>
39 #include <linux/err.h>
40 #include <linux/random.h>
41 #include <linux/spinlock.h>
42 #include <linux/slab.h>
43 #include <linux/pci.h>
44 #include <linux/dma-mapping.h>
45 #include <linux/kref.h>
46 #include <linux/idr.h>
47 #include <linux/workqueue.h>
49 #include <rdma/ib_pack.h>
50 #include <rdma/ib_cache.h>
53 MODULE_AUTHOR("Roland Dreier");
54 MODULE_DESCRIPTION("InfiniBand subnet administration query support");
55 MODULE_LICENSE("Dual BSD/GPL");
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 memset(&ah_attr
, 0, sizeof ah_attr
);
387 ah_attr
.dlid
= port_attr
.sm_lid
;
388 ah_attr
.sl
= port_attr
.sm_sl
;
389 ah_attr
.port_num
= port
->port_num
;
391 new_ah
->ah
= ib_create_ah(port
->agent
->qp
->pd
, &ah_attr
);
392 if (IS_ERR(new_ah
->ah
)) {
393 printk(KERN_WARNING
"Couldn't create new SM AH\n");
398 spin_lock_irq(&port
->ah_lock
);
399 old_ah
= port
->sm_ah
;
400 port
->sm_ah
= new_ah
;
401 spin_unlock_irq(&port
->ah_lock
);
404 kref_put(&old_ah
->ref
, free_sm_ah
);
407 static void ib_sa_event(struct ib_event_handler
*handler
, struct ib_event
*event
)
409 if (event
->event
== IB_EVENT_PORT_ERR
||
410 event
->event
== IB_EVENT_PORT_ACTIVE
||
411 event
->event
== IB_EVENT_LID_CHANGE
||
412 event
->event
== IB_EVENT_PKEY_CHANGE
||
413 event
->event
== IB_EVENT_SM_CHANGE
||
414 event
->event
== IB_EVENT_CLIENT_REREGISTER
) {
415 struct ib_sa_device
*sa_dev
;
416 sa_dev
= container_of(handler
, typeof(*sa_dev
), event_handler
);
418 schedule_work(&sa_dev
->port
[event
->element
.port_num
-
419 sa_dev
->start_port
].update_task
);
423 void ib_sa_register_client(struct ib_sa_client
*client
)
425 atomic_set(&client
->users
, 1);
426 init_completion(&client
->comp
);
428 EXPORT_SYMBOL(ib_sa_register_client
);
430 void ib_sa_unregister_client(struct ib_sa_client
*client
)
432 ib_sa_client_put(client
);
433 wait_for_completion(&client
->comp
);
435 EXPORT_SYMBOL(ib_sa_unregister_client
);
438 * ib_sa_cancel_query - try to cancel an SA query
439 * @id:ID of query to cancel
440 * @query:query pointer to cancel
442 * Try to cancel an SA query. If the id and query don't match up or
443 * the query has already completed, nothing is done. Otherwise the
444 * query is canceled and will complete with a status of -EINTR.
446 void ib_sa_cancel_query(int id
, struct ib_sa_query
*query
)
449 struct ib_mad_agent
*agent
;
450 struct ib_mad_send_buf
*mad_buf
;
452 spin_lock_irqsave(&idr_lock
, flags
);
453 if (idr_find(&query_idr
, id
) != query
) {
454 spin_unlock_irqrestore(&idr_lock
, flags
);
457 agent
= query
->port
->agent
;
458 mad_buf
= query
->mad_buf
;
459 spin_unlock_irqrestore(&idr_lock
, flags
);
461 ib_cancel_mad(agent
, mad_buf
);
463 EXPORT_SYMBOL(ib_sa_cancel_query
);
465 static u8
get_src_path_mask(struct ib_device
*device
, u8 port_num
)
467 struct ib_sa_device
*sa_dev
;
468 struct ib_sa_port
*port
;
472 sa_dev
= ib_get_client_data(device
, &sa_client
);
476 port
= &sa_dev
->port
[port_num
- sa_dev
->start_port
];
477 spin_lock_irqsave(&port
->ah_lock
, flags
);
478 src_path_mask
= port
->sm_ah
? port
->sm_ah
->src_path_mask
: 0x7f;
479 spin_unlock_irqrestore(&port
->ah_lock
, flags
);
481 return src_path_mask
;
484 int ib_init_ah_from_path(struct ib_device
*device
, u8 port_num
,
485 struct ib_sa_path_rec
*rec
, struct ib_ah_attr
*ah_attr
)
490 memset(ah_attr
, 0, sizeof *ah_attr
);
491 ah_attr
->dlid
= be16_to_cpu(rec
->dlid
);
492 ah_attr
->sl
= rec
->sl
;
493 ah_attr
->src_path_bits
= be16_to_cpu(rec
->slid
) &
494 get_src_path_mask(device
, port_num
);
495 ah_attr
->port_num
= port_num
;
496 ah_attr
->static_rate
= rec
->rate
;
498 if (rec
->hop_limit
> 1) {
499 ah_attr
->ah_flags
= IB_AH_GRH
;
500 ah_attr
->grh
.dgid
= rec
->dgid
;
502 ret
= ib_find_cached_gid(device
, &rec
->sgid
, &port_num
,
507 ah_attr
->grh
.sgid_index
= gid_index
;
508 ah_attr
->grh
.flow_label
= be32_to_cpu(rec
->flow_label
);
509 ah_attr
->grh
.hop_limit
= rec
->hop_limit
;
510 ah_attr
->grh
.traffic_class
= rec
->traffic_class
;
514 EXPORT_SYMBOL(ib_init_ah_from_path
);
516 static void init_mad(struct ib_sa_mad
*mad
, struct ib_mad_agent
*agent
)
520 memset(mad
, 0, sizeof *mad
);
522 mad
->mad_hdr
.base_version
= IB_MGMT_BASE_VERSION
;
523 mad
->mad_hdr
.mgmt_class
= IB_MGMT_CLASS_SUBN_ADM
;
524 mad
->mad_hdr
.class_version
= IB_SA_CLASS_VERSION
;
526 spin_lock_irqsave(&tid_lock
, flags
);
528 cpu_to_be64(((u64
) agent
->hi_tid
) << 32 | tid
++);
529 spin_unlock_irqrestore(&tid_lock
, flags
);
532 static int send_mad(struct ib_sa_query
*query
, int timeout_ms
, gfp_t gfp_mask
)
538 if (!idr_pre_get(&query_idr
, gfp_mask
))
540 spin_lock_irqsave(&idr_lock
, flags
);
541 ret
= idr_get_new(&query_idr
, query
, &id
);
542 spin_unlock_irqrestore(&idr_lock
, flags
);
548 query
->mad_buf
->timeout_ms
= timeout_ms
;
549 query
->mad_buf
->context
[0] = query
;
552 spin_lock_irqsave(&query
->port
->ah_lock
, flags
);
553 kref_get(&query
->port
->sm_ah
->ref
);
554 query
->sm_ah
= query
->port
->sm_ah
;
555 spin_unlock_irqrestore(&query
->port
->ah_lock
, flags
);
557 query
->mad_buf
->ah
= query
->sm_ah
->ah
;
559 ret
= ib_post_send_mad(query
->mad_buf
, NULL
);
561 spin_lock_irqsave(&idr_lock
, flags
);
562 idr_remove(&query_idr
, id
);
563 spin_unlock_irqrestore(&idr_lock
, flags
);
565 kref_put(&query
->sm_ah
->ref
, free_sm_ah
);
569 * It's not safe to dereference query any more, because the
570 * send may already have completed and freed the query in
573 return ret
? ret
: id
;
576 static void ib_sa_path_rec_callback(struct ib_sa_query
*sa_query
,
578 struct ib_sa_mad
*mad
)
580 struct ib_sa_path_query
*query
=
581 container_of(sa_query
, struct ib_sa_path_query
, sa_query
);
584 struct ib_sa_path_rec rec
;
586 ib_unpack(path_rec_table
, ARRAY_SIZE(path_rec_table
),
588 query
->callback(status
, &rec
, query
->context
);
590 query
->callback(status
, NULL
, query
->context
);
593 static void ib_sa_path_rec_release(struct ib_sa_query
*sa_query
)
595 kfree(container_of(sa_query
, struct ib_sa_path_query
, sa_query
));
599 * ib_sa_path_rec_get - Start a Path get query
601 * @device:device to send query on
602 * @port_num: port number to send query on
603 * @rec:Path Record to send in query
604 * @comp_mask:component mask to send in query
605 * @timeout_ms:time to wait for response
606 * @gfp_mask:GFP mask to use for internal allocations
607 * @callback:function called when query completes, times out or is
609 * @context:opaque user context passed to callback
610 * @sa_query:query context, used to cancel query
612 * Send a Path Record Get query to the SA to look up a path. The
613 * callback function will be called when the query completes (or
614 * fails); status is 0 for a successful response, -EINTR if the query
615 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
616 * occurred sending the query. The resp parameter of the callback is
617 * only valid if status is 0.
619 * If the return value of ib_sa_path_rec_get() is negative, it is an
620 * error code. Otherwise it is a query ID that can be used to cancel
623 int ib_sa_path_rec_get(struct ib_sa_client
*client
,
624 struct ib_device
*device
, u8 port_num
,
625 struct ib_sa_path_rec
*rec
,
626 ib_sa_comp_mask comp_mask
,
627 int timeout_ms
, gfp_t gfp_mask
,
628 void (*callback
)(int status
,
629 struct ib_sa_path_rec
*resp
,
632 struct ib_sa_query
**sa_query
)
634 struct ib_sa_path_query
*query
;
635 struct ib_sa_device
*sa_dev
= ib_get_client_data(device
, &sa_client
);
636 struct ib_sa_port
*port
;
637 struct ib_mad_agent
*agent
;
638 struct ib_sa_mad
*mad
;
644 port
= &sa_dev
->port
[port_num
- sa_dev
->start_port
];
647 query
= kmalloc(sizeof *query
, gfp_mask
);
651 query
->sa_query
.mad_buf
= ib_create_send_mad(agent
, 1, 0,
653 IB_MGMT_SA_DATA
, gfp_mask
);
654 if (!query
->sa_query
.mad_buf
) {
659 ib_sa_client_get(client
);
660 query
->sa_query
.client
= client
;
661 query
->callback
= callback
;
662 query
->context
= context
;
664 mad
= query
->sa_query
.mad_buf
->mad
;
665 init_mad(mad
, agent
);
667 query
->sa_query
.callback
= callback
? ib_sa_path_rec_callback
: NULL
;
668 query
->sa_query
.release
= ib_sa_path_rec_release
;
669 query
->sa_query
.port
= port
;
670 mad
->mad_hdr
.method
= IB_MGMT_METHOD_GET
;
671 mad
->mad_hdr
.attr_id
= cpu_to_be16(IB_SA_ATTR_PATH_REC
);
672 mad
->sa_hdr
.comp_mask
= comp_mask
;
674 ib_pack(path_rec_table
, ARRAY_SIZE(path_rec_table
), rec
, mad
->data
);
676 *sa_query
= &query
->sa_query
;
678 ret
= send_mad(&query
->sa_query
, timeout_ms
, gfp_mask
);
686 ib_sa_client_put(query
->sa_query
.client
);
687 ib_free_send_mad(query
->sa_query
.mad_buf
);
693 EXPORT_SYMBOL(ib_sa_path_rec_get
);
695 static void ib_sa_service_rec_callback(struct ib_sa_query
*sa_query
,
697 struct ib_sa_mad
*mad
)
699 struct ib_sa_service_query
*query
=
700 container_of(sa_query
, struct ib_sa_service_query
, sa_query
);
703 struct ib_sa_service_rec rec
;
705 ib_unpack(service_rec_table
, ARRAY_SIZE(service_rec_table
),
707 query
->callback(status
, &rec
, query
->context
);
709 query
->callback(status
, NULL
, query
->context
);
712 static void ib_sa_service_rec_release(struct ib_sa_query
*sa_query
)
714 kfree(container_of(sa_query
, struct ib_sa_service_query
, sa_query
));
718 * ib_sa_service_rec_query - Start Service Record operation
720 * @device:device to send request on
721 * @port_num: port number to send request on
722 * @method:SA method - should be get, set, or delete
723 * @rec:Service Record to send in request
724 * @comp_mask:component mask to send in request
725 * @timeout_ms:time to wait for response
726 * @gfp_mask:GFP mask to use for internal allocations
727 * @callback:function called when request completes, times out or is
729 * @context:opaque user context passed to callback
730 * @sa_query:request context, used to cancel request
732 * Send a Service Record set/get/delete to the SA to register,
733 * unregister or query a service record.
734 * The callback function will be called when the request completes (or
735 * fails); status is 0 for a successful response, -EINTR if the query
736 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
737 * occurred sending the query. The resp parameter of the callback is
738 * only valid if status is 0.
740 * If the return value of ib_sa_service_rec_query() is negative, it is an
741 * error code. Otherwise it is a request ID that can be used to cancel
744 int ib_sa_service_rec_query(struct ib_sa_client
*client
,
745 struct ib_device
*device
, u8 port_num
, u8 method
,
746 struct ib_sa_service_rec
*rec
,
747 ib_sa_comp_mask comp_mask
,
748 int timeout_ms
, gfp_t gfp_mask
,
749 void (*callback
)(int status
,
750 struct ib_sa_service_rec
*resp
,
753 struct ib_sa_query
**sa_query
)
755 struct ib_sa_service_query
*query
;
756 struct ib_sa_device
*sa_dev
= ib_get_client_data(device
, &sa_client
);
757 struct ib_sa_port
*port
;
758 struct ib_mad_agent
*agent
;
759 struct ib_sa_mad
*mad
;
765 port
= &sa_dev
->port
[port_num
- sa_dev
->start_port
];
768 if (method
!= IB_MGMT_METHOD_GET
&&
769 method
!= IB_MGMT_METHOD_SET
&&
770 method
!= IB_SA_METHOD_DELETE
)
773 query
= kmalloc(sizeof *query
, gfp_mask
);
777 query
->sa_query
.mad_buf
= ib_create_send_mad(agent
, 1, 0,
779 IB_MGMT_SA_DATA
, gfp_mask
);
780 if (!query
->sa_query
.mad_buf
) {
785 ib_sa_client_get(client
);
786 query
->sa_query
.client
= client
;
787 query
->callback
= callback
;
788 query
->context
= context
;
790 mad
= query
->sa_query
.mad_buf
->mad
;
791 init_mad(mad
, agent
);
793 query
->sa_query
.callback
= callback
? ib_sa_service_rec_callback
: NULL
;
794 query
->sa_query
.release
= ib_sa_service_rec_release
;
795 query
->sa_query
.port
= port
;
796 mad
->mad_hdr
.method
= method
;
797 mad
->mad_hdr
.attr_id
= cpu_to_be16(IB_SA_ATTR_SERVICE_REC
);
798 mad
->sa_hdr
.comp_mask
= comp_mask
;
800 ib_pack(service_rec_table
, ARRAY_SIZE(service_rec_table
),
803 *sa_query
= &query
->sa_query
;
805 ret
= send_mad(&query
->sa_query
, timeout_ms
, gfp_mask
);
813 ib_sa_client_put(query
->sa_query
.client
);
814 ib_free_send_mad(query
->sa_query
.mad_buf
);
820 EXPORT_SYMBOL(ib_sa_service_rec_query
);
822 static void ib_sa_mcmember_rec_callback(struct ib_sa_query
*sa_query
,
824 struct ib_sa_mad
*mad
)
826 struct ib_sa_mcmember_query
*query
=
827 container_of(sa_query
, struct ib_sa_mcmember_query
, sa_query
);
830 struct ib_sa_mcmember_rec rec
;
832 ib_unpack(mcmember_rec_table
, ARRAY_SIZE(mcmember_rec_table
),
834 query
->callback(status
, &rec
, query
->context
);
836 query
->callback(status
, NULL
, query
->context
);
839 static void ib_sa_mcmember_rec_release(struct ib_sa_query
*sa_query
)
841 kfree(container_of(sa_query
, struct ib_sa_mcmember_query
, sa_query
));
844 int ib_sa_mcmember_rec_query(struct ib_sa_client
*client
,
845 struct ib_device
*device
, u8 port_num
,
847 struct ib_sa_mcmember_rec
*rec
,
848 ib_sa_comp_mask comp_mask
,
849 int timeout_ms
, gfp_t gfp_mask
,
850 void (*callback
)(int status
,
851 struct ib_sa_mcmember_rec
*resp
,
854 struct ib_sa_query
**sa_query
)
856 struct ib_sa_mcmember_query
*query
;
857 struct ib_sa_device
*sa_dev
= ib_get_client_data(device
, &sa_client
);
858 struct ib_sa_port
*port
;
859 struct ib_mad_agent
*agent
;
860 struct ib_sa_mad
*mad
;
866 port
= &sa_dev
->port
[port_num
- sa_dev
->start_port
];
869 query
= kmalloc(sizeof *query
, gfp_mask
);
873 query
->sa_query
.mad_buf
= ib_create_send_mad(agent
, 1, 0,
875 IB_MGMT_SA_DATA
, gfp_mask
);
876 if (!query
->sa_query
.mad_buf
) {
881 ib_sa_client_get(client
);
882 query
->sa_query
.client
= client
;
883 query
->callback
= callback
;
884 query
->context
= context
;
886 mad
= query
->sa_query
.mad_buf
->mad
;
887 init_mad(mad
, agent
);
889 query
->sa_query
.callback
= callback
? ib_sa_mcmember_rec_callback
: NULL
;
890 query
->sa_query
.release
= ib_sa_mcmember_rec_release
;
891 query
->sa_query
.port
= port
;
892 mad
->mad_hdr
.method
= method
;
893 mad
->mad_hdr
.attr_id
= cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC
);
894 mad
->sa_hdr
.comp_mask
= comp_mask
;
896 ib_pack(mcmember_rec_table
, ARRAY_SIZE(mcmember_rec_table
),
899 *sa_query
= &query
->sa_query
;
901 ret
= send_mad(&query
->sa_query
, timeout_ms
, gfp_mask
);
909 ib_sa_client_put(query
->sa_query
.client
);
910 ib_free_send_mad(query
->sa_query
.mad_buf
);
917 static void send_handler(struct ib_mad_agent
*agent
,
918 struct ib_mad_send_wc
*mad_send_wc
)
920 struct ib_sa_query
*query
= mad_send_wc
->send_buf
->context
[0];
924 switch (mad_send_wc
->status
) {
926 /* No callback -- already got recv */
928 case IB_WC_RESP_TIMEOUT_ERR
:
929 query
->callback(query
, -ETIMEDOUT
, NULL
);
931 case IB_WC_WR_FLUSH_ERR
:
932 query
->callback(query
, -EINTR
, NULL
);
935 query
->callback(query
, -EIO
, NULL
);
939 spin_lock_irqsave(&idr_lock
, flags
);
940 idr_remove(&query_idr
, query
->id
);
941 spin_unlock_irqrestore(&idr_lock
, flags
);
943 ib_free_send_mad(mad_send_wc
->send_buf
);
944 kref_put(&query
->sm_ah
->ref
, free_sm_ah
);
945 ib_sa_client_put(query
->client
);
946 query
->release(query
);
949 static void recv_handler(struct ib_mad_agent
*mad_agent
,
950 struct ib_mad_recv_wc
*mad_recv_wc
)
952 struct ib_sa_query
*query
;
953 struct ib_mad_send_buf
*mad_buf
;
955 mad_buf
= (void *) (unsigned long) mad_recv_wc
->wc
->wr_id
;
956 query
= mad_buf
->context
[0];
958 if (query
->callback
) {
959 if (mad_recv_wc
->wc
->status
== IB_WC_SUCCESS
)
960 query
->callback(query
,
961 mad_recv_wc
->recv_buf
.mad
->mad_hdr
.status
?
963 (struct ib_sa_mad
*) mad_recv_wc
->recv_buf
.mad
);
965 query
->callback(query
, -EIO
, NULL
);
968 ib_free_recv_mad(mad_recv_wc
);
971 static void ib_sa_add_one(struct ib_device
*device
)
973 struct ib_sa_device
*sa_dev
;
976 if (rdma_node_get_transport(device
->node_type
) != RDMA_TRANSPORT_IB
)
979 if (device
->node_type
== RDMA_NODE_IB_SWITCH
)
983 e
= device
->phys_port_cnt
;
986 sa_dev
= kmalloc(sizeof *sa_dev
+
987 (e
- s
+ 1) * sizeof (struct ib_sa_port
),
992 sa_dev
->start_port
= s
;
993 sa_dev
->end_port
= e
;
995 for (i
= 0; i
<= e
- s
; ++i
) {
996 sa_dev
->port
[i
].sm_ah
= NULL
;
997 sa_dev
->port
[i
].port_num
= i
+ s
;
998 spin_lock_init(&sa_dev
->port
[i
].ah_lock
);
1000 sa_dev
->port
[i
].agent
=
1001 ib_register_mad_agent(device
, i
+ s
, IB_QPT_GSI
,
1002 NULL
, 0, send_handler
,
1003 recv_handler
, sa_dev
);
1004 if (IS_ERR(sa_dev
->port
[i
].agent
))
1007 INIT_WORK(&sa_dev
->port
[i
].update_task
, update_sm_ah
);
1010 ib_set_client_data(device
, &sa_client
, sa_dev
);
1013 * We register our event handler after everything is set up,
1014 * and then update our cached info after the event handler is
1015 * registered to avoid any problems if a port changes state
1016 * during our initialization.
1019 INIT_IB_EVENT_HANDLER(&sa_dev
->event_handler
, device
, ib_sa_event
);
1020 if (ib_register_event_handler(&sa_dev
->event_handler
))
1023 for (i
= 0; i
<= e
- s
; ++i
)
1024 update_sm_ah(&sa_dev
->port
[i
].update_task
);
1030 ib_unregister_mad_agent(sa_dev
->port
[i
].agent
);
1037 static void ib_sa_remove_one(struct ib_device
*device
)
1039 struct ib_sa_device
*sa_dev
= ib_get_client_data(device
, &sa_client
);
1045 ib_unregister_event_handler(&sa_dev
->event_handler
);
1047 flush_scheduled_work();
1049 for (i
= 0; i
<= sa_dev
->end_port
- sa_dev
->start_port
; ++i
) {
1050 ib_unregister_mad_agent(sa_dev
->port
[i
].agent
);
1051 kref_put(&sa_dev
->port
[i
].sm_ah
->ref
, free_sm_ah
);
1057 static int __init
ib_sa_init(void)
1061 spin_lock_init(&idr_lock
);
1062 spin_lock_init(&tid_lock
);
1064 get_random_bytes(&tid
, sizeof tid
);
1066 ret
= ib_register_client(&sa_client
);
1068 printk(KERN_ERR
"Couldn't register ib_sa client\n");
1074 printk(KERN_ERR
"Couldn't initialize multicast handling\n");
1080 ib_unregister_client(&sa_client
);
1085 static void __exit
ib_sa_cleanup(void)
1088 ib_unregister_client(&sa_client
);
1089 idr_destroy(&query_idr
);
1092 module_init(ib_sa_init
);
1093 module_exit(ib_sa_cleanup
);