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_sa.h>
51 #include <rdma/ib_cache.h>
53 MODULE_AUTHOR("Roland Dreier");
54 MODULE_DESCRIPTION("InfiniBand subnet administration query support");
55 MODULE_LICENSE("Dual BSD/GPL");
63 struct ib_mad_agent
*agent
;
64 struct ib_sa_sm_ah
*sm_ah
;
65 struct work_struct update_task
;
71 int start_port
, end_port
;
72 struct ib_event_handler event_handler
;
73 struct ib_sa_port port
[0];
77 void (*callback
)(struct ib_sa_query
*, int, struct ib_sa_mad
*);
78 void (*release
)(struct ib_sa_query
*);
79 struct ib_sa_client
*client
;
80 struct ib_sa_port
*port
;
81 struct ib_mad_send_buf
*mad_buf
;
82 struct ib_sa_sm_ah
*sm_ah
;
86 struct ib_sa_service_query
{
87 void (*callback
)(int, struct ib_sa_service_rec
*, void *);
89 struct ib_sa_query sa_query
;
92 struct ib_sa_path_query
{
93 void (*callback
)(int, struct ib_sa_path_rec
*, void *);
95 struct ib_sa_query sa_query
;
98 struct ib_sa_mcmember_query
{
99 void (*callback
)(int, struct ib_sa_mcmember_rec
*, void *);
101 struct ib_sa_query sa_query
;
104 static void ib_sa_add_one(struct ib_device
*device
);
105 static void ib_sa_remove_one(struct ib_device
*device
);
107 static struct ib_client sa_client
= {
109 .add
= ib_sa_add_one
,
110 .remove
= ib_sa_remove_one
113 static spinlock_t idr_lock
;
114 static DEFINE_IDR(query_idr
);
116 static spinlock_t tid_lock
;
119 #define PATH_REC_FIELD(field) \
120 .struct_offset_bytes = offsetof(struct ib_sa_path_rec, field), \
121 .struct_size_bytes = sizeof ((struct ib_sa_path_rec *) 0)->field, \
122 .field_name = "sa_path_rec:" #field
124 static const struct ib_field path_rec_table
[] = {
133 { PATH_REC_FIELD(dgid
),
137 { PATH_REC_FIELD(sgid
),
141 { PATH_REC_FIELD(dlid
),
145 { PATH_REC_FIELD(slid
),
149 { PATH_REC_FIELD(raw_traffic
),
157 { PATH_REC_FIELD(flow_label
),
161 { PATH_REC_FIELD(hop_limit
),
165 { PATH_REC_FIELD(traffic_class
),
169 { PATH_REC_FIELD(reversible
),
173 { PATH_REC_FIELD(numb_path
),
177 { PATH_REC_FIELD(pkey
),
185 { PATH_REC_FIELD(sl
),
189 { PATH_REC_FIELD(mtu_selector
),
193 { PATH_REC_FIELD(mtu
),
197 { PATH_REC_FIELD(rate_selector
),
201 { PATH_REC_FIELD(rate
),
205 { PATH_REC_FIELD(packet_life_time_selector
),
209 { PATH_REC_FIELD(packet_life_time
),
213 { PATH_REC_FIELD(preference
),
223 #define MCMEMBER_REC_FIELD(field) \
224 .struct_offset_bytes = offsetof(struct ib_sa_mcmember_rec, field), \
225 .struct_size_bytes = sizeof ((struct ib_sa_mcmember_rec *) 0)->field, \
226 .field_name = "sa_mcmember_rec:" #field
228 static const struct ib_field mcmember_rec_table
[] = {
229 { MCMEMBER_REC_FIELD(mgid
),
233 { MCMEMBER_REC_FIELD(port_gid
),
237 { MCMEMBER_REC_FIELD(qkey
),
241 { MCMEMBER_REC_FIELD(mlid
),
245 { MCMEMBER_REC_FIELD(mtu_selector
),
249 { MCMEMBER_REC_FIELD(mtu
),
253 { MCMEMBER_REC_FIELD(traffic_class
),
257 { MCMEMBER_REC_FIELD(pkey
),
261 { MCMEMBER_REC_FIELD(rate_selector
),
265 { MCMEMBER_REC_FIELD(rate
),
269 { MCMEMBER_REC_FIELD(packet_life_time_selector
),
273 { MCMEMBER_REC_FIELD(packet_life_time
),
277 { MCMEMBER_REC_FIELD(sl
),
281 { MCMEMBER_REC_FIELD(flow_label
),
285 { MCMEMBER_REC_FIELD(hop_limit
),
289 { MCMEMBER_REC_FIELD(scope
),
293 { MCMEMBER_REC_FIELD(join_state
),
297 { MCMEMBER_REC_FIELD(proxy_join
),
307 #define SERVICE_REC_FIELD(field) \
308 .struct_offset_bytes = offsetof(struct ib_sa_service_rec, field), \
309 .struct_size_bytes = sizeof ((struct ib_sa_service_rec *) 0)->field, \
310 .field_name = "sa_service_rec:" #field
312 static const struct ib_field service_rec_table
[] = {
313 { SERVICE_REC_FIELD(id
),
317 { SERVICE_REC_FIELD(gid
),
321 { SERVICE_REC_FIELD(pkey
),
325 { SERVICE_REC_FIELD(lease
),
329 { SERVICE_REC_FIELD(key
),
333 { SERVICE_REC_FIELD(name
),
337 { SERVICE_REC_FIELD(data8
),
341 { SERVICE_REC_FIELD(data16
),
345 { SERVICE_REC_FIELD(data32
),
349 { SERVICE_REC_FIELD(data64
),
355 static void free_sm_ah(struct kref
*kref
)
357 struct ib_sa_sm_ah
*sm_ah
= container_of(kref
, struct ib_sa_sm_ah
, ref
);
359 ib_destroy_ah(sm_ah
->ah
);
363 static void update_sm_ah(void *port_ptr
)
365 struct ib_sa_port
*port
= port_ptr
;
366 struct ib_sa_sm_ah
*new_ah
, *old_ah
;
367 struct ib_port_attr port_attr
;
368 struct ib_ah_attr ah_attr
;
370 if (ib_query_port(port
->agent
->device
, port
->port_num
, &port_attr
)) {
371 printk(KERN_WARNING
"Couldn't query port\n");
375 new_ah
= kmalloc(sizeof *new_ah
, GFP_KERNEL
);
377 printk(KERN_WARNING
"Couldn't allocate new SM AH\n");
381 kref_init(&new_ah
->ref
);
383 memset(&ah_attr
, 0, sizeof ah_attr
);
384 ah_attr
.dlid
= port_attr
.sm_lid
;
385 ah_attr
.sl
= port_attr
.sm_sl
;
386 ah_attr
.port_num
= port
->port_num
;
388 new_ah
->ah
= ib_create_ah(port
->agent
->qp
->pd
, &ah_attr
);
389 if (IS_ERR(new_ah
->ah
)) {
390 printk(KERN_WARNING
"Couldn't create new SM AH\n");
395 spin_lock_irq(&port
->ah_lock
);
396 old_ah
= port
->sm_ah
;
397 port
->sm_ah
= new_ah
;
398 spin_unlock_irq(&port
->ah_lock
);
401 kref_put(&old_ah
->ref
, free_sm_ah
);
404 static void ib_sa_event(struct ib_event_handler
*handler
, struct ib_event
*event
)
406 if (event
->event
== IB_EVENT_PORT_ERR
||
407 event
->event
== IB_EVENT_PORT_ACTIVE
||
408 event
->event
== IB_EVENT_LID_CHANGE
||
409 event
->event
== IB_EVENT_PKEY_CHANGE
||
410 event
->event
== IB_EVENT_SM_CHANGE
||
411 event
->event
== IB_EVENT_CLIENT_REREGISTER
) {
412 struct ib_sa_device
*sa_dev
;
413 sa_dev
= container_of(handler
, typeof(*sa_dev
), event_handler
);
415 schedule_work(&sa_dev
->port
[event
->element
.port_num
-
416 sa_dev
->start_port
].update_task
);
420 void ib_sa_register_client(struct ib_sa_client
*client
)
422 atomic_set(&client
->users
, 1);
423 init_completion(&client
->comp
);
425 EXPORT_SYMBOL(ib_sa_register_client
);
427 static inline void ib_sa_client_get(struct ib_sa_client
*client
)
429 atomic_inc(&client
->users
);
432 static inline void ib_sa_client_put(struct ib_sa_client
*client
)
434 if (atomic_dec_and_test(&client
->users
))
435 complete(&client
->comp
);
438 void ib_sa_unregister_client(struct ib_sa_client
*client
)
440 ib_sa_client_put(client
);
441 wait_for_completion(&client
->comp
);
443 EXPORT_SYMBOL(ib_sa_unregister_client
);
446 * ib_sa_cancel_query - try to cancel an SA query
447 * @id:ID of query to cancel
448 * @query:query pointer to cancel
450 * Try to cancel an SA query. If the id and query don't match up or
451 * the query has already completed, nothing is done. Otherwise the
452 * query is canceled and will complete with a status of -EINTR.
454 void ib_sa_cancel_query(int id
, struct ib_sa_query
*query
)
457 struct ib_mad_agent
*agent
;
458 struct ib_mad_send_buf
*mad_buf
;
460 spin_lock_irqsave(&idr_lock
, flags
);
461 if (idr_find(&query_idr
, id
) != query
) {
462 spin_unlock_irqrestore(&idr_lock
, flags
);
465 agent
= query
->port
->agent
;
466 mad_buf
= query
->mad_buf
;
467 spin_unlock_irqrestore(&idr_lock
, flags
);
469 ib_cancel_mad(agent
, mad_buf
);
471 EXPORT_SYMBOL(ib_sa_cancel_query
);
473 int ib_init_ah_from_path(struct ib_device
*device
, u8 port_num
,
474 struct ib_sa_path_rec
*rec
, struct ib_ah_attr
*ah_attr
)
479 memset(ah_attr
, 0, sizeof *ah_attr
);
480 ah_attr
->dlid
= be16_to_cpu(rec
->dlid
);
481 ah_attr
->sl
= rec
->sl
;
482 ah_attr
->src_path_bits
= be16_to_cpu(rec
->slid
) & 0x7f;
483 ah_attr
->port_num
= port_num
;
485 if (rec
->hop_limit
> 1) {
486 ah_attr
->ah_flags
= IB_AH_GRH
;
487 ah_attr
->grh
.dgid
= rec
->dgid
;
489 ret
= ib_find_cached_gid(device
, &rec
->sgid
, &port_num
,
494 ah_attr
->grh
.sgid_index
= gid_index
;
495 ah_attr
->grh
.flow_label
= be32_to_cpu(rec
->flow_label
);
496 ah_attr
->grh
.hop_limit
= rec
->hop_limit
;
497 ah_attr
->grh
.traffic_class
= rec
->traffic_class
;
501 EXPORT_SYMBOL(ib_init_ah_from_path
);
503 static void init_mad(struct ib_sa_mad
*mad
, struct ib_mad_agent
*agent
)
507 memset(mad
, 0, sizeof *mad
);
509 mad
->mad_hdr
.base_version
= IB_MGMT_BASE_VERSION
;
510 mad
->mad_hdr
.mgmt_class
= IB_MGMT_CLASS_SUBN_ADM
;
511 mad
->mad_hdr
.class_version
= IB_SA_CLASS_VERSION
;
513 spin_lock_irqsave(&tid_lock
, flags
);
515 cpu_to_be64(((u64
) agent
->hi_tid
) << 32 | tid
++);
516 spin_unlock_irqrestore(&tid_lock
, flags
);
519 static int send_mad(struct ib_sa_query
*query
, int timeout_ms
, gfp_t gfp_mask
)
525 if (!idr_pre_get(&query_idr
, gfp_mask
))
527 spin_lock_irqsave(&idr_lock
, flags
);
528 ret
= idr_get_new(&query_idr
, query
, &id
);
529 spin_unlock_irqrestore(&idr_lock
, flags
);
535 query
->mad_buf
->timeout_ms
= timeout_ms
;
536 query
->mad_buf
->context
[0] = query
;
539 spin_lock_irqsave(&query
->port
->ah_lock
, flags
);
540 kref_get(&query
->port
->sm_ah
->ref
);
541 query
->sm_ah
= query
->port
->sm_ah
;
542 spin_unlock_irqrestore(&query
->port
->ah_lock
, flags
);
544 query
->mad_buf
->ah
= query
->sm_ah
->ah
;
546 ret
= ib_post_send_mad(query
->mad_buf
, NULL
);
548 spin_lock_irqsave(&idr_lock
, flags
);
549 idr_remove(&query_idr
, id
);
550 spin_unlock_irqrestore(&idr_lock
, flags
);
552 kref_put(&query
->sm_ah
->ref
, free_sm_ah
);
556 * It's not safe to dereference query any more, because the
557 * send may already have completed and freed the query in
560 return ret
? ret
: id
;
563 static void ib_sa_path_rec_callback(struct ib_sa_query
*sa_query
,
565 struct ib_sa_mad
*mad
)
567 struct ib_sa_path_query
*query
=
568 container_of(sa_query
, struct ib_sa_path_query
, sa_query
);
571 struct ib_sa_path_rec rec
;
573 ib_unpack(path_rec_table
, ARRAY_SIZE(path_rec_table
),
575 query
->callback(status
, &rec
, query
->context
);
577 query
->callback(status
, NULL
, query
->context
);
580 static void ib_sa_path_rec_release(struct ib_sa_query
*sa_query
)
582 kfree(container_of(sa_query
, struct ib_sa_path_query
, sa_query
));
586 * ib_sa_path_rec_get - Start a Path get query
588 * @device:device to send query on
589 * @port_num: port number to send query on
590 * @rec:Path Record to send in query
591 * @comp_mask:component mask to send in query
592 * @timeout_ms:time to wait for response
593 * @gfp_mask:GFP mask to use for internal allocations
594 * @callback:function called when query completes, times out or is
596 * @context:opaque user context passed to callback
597 * @sa_query:query context, used to cancel query
599 * Send a Path Record Get query to the SA to look up a path. The
600 * callback function will be called when the query completes (or
601 * fails); status is 0 for a successful response, -EINTR if the query
602 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
603 * occurred sending the query. The resp parameter of the callback is
604 * only valid if status is 0.
606 * If the return value of ib_sa_path_rec_get() is negative, it is an
607 * error code. Otherwise it is a query ID that can be used to cancel
610 int ib_sa_path_rec_get(struct ib_sa_client
*client
,
611 struct ib_device
*device
, u8 port_num
,
612 struct ib_sa_path_rec
*rec
,
613 ib_sa_comp_mask comp_mask
,
614 int timeout_ms
, gfp_t gfp_mask
,
615 void (*callback
)(int status
,
616 struct ib_sa_path_rec
*resp
,
619 struct ib_sa_query
**sa_query
)
621 struct ib_sa_path_query
*query
;
622 struct ib_sa_device
*sa_dev
= ib_get_client_data(device
, &sa_client
);
623 struct ib_sa_port
*port
;
624 struct ib_mad_agent
*agent
;
625 struct ib_sa_mad
*mad
;
631 port
= &sa_dev
->port
[port_num
- sa_dev
->start_port
];
634 query
= kmalloc(sizeof *query
, gfp_mask
);
638 query
->sa_query
.mad_buf
= ib_create_send_mad(agent
, 1, 0,
640 IB_MGMT_SA_DATA
, gfp_mask
);
641 if (!query
->sa_query
.mad_buf
) {
646 ib_sa_client_get(client
);
647 query
->sa_query
.client
= client
;
648 query
->callback
= callback
;
649 query
->context
= context
;
651 mad
= query
->sa_query
.mad_buf
->mad
;
652 init_mad(mad
, agent
);
654 query
->sa_query
.callback
= callback
? ib_sa_path_rec_callback
: NULL
;
655 query
->sa_query
.release
= ib_sa_path_rec_release
;
656 query
->sa_query
.port
= port
;
657 mad
->mad_hdr
.method
= IB_MGMT_METHOD_GET
;
658 mad
->mad_hdr
.attr_id
= cpu_to_be16(IB_SA_ATTR_PATH_REC
);
659 mad
->sa_hdr
.comp_mask
= comp_mask
;
661 ib_pack(path_rec_table
, ARRAY_SIZE(path_rec_table
), rec
, mad
->data
);
663 *sa_query
= &query
->sa_query
;
665 ret
= send_mad(&query
->sa_query
, timeout_ms
, gfp_mask
);
673 ib_sa_client_put(query
->sa_query
.client
);
674 ib_free_send_mad(query
->sa_query
.mad_buf
);
680 EXPORT_SYMBOL(ib_sa_path_rec_get
);
682 static void ib_sa_service_rec_callback(struct ib_sa_query
*sa_query
,
684 struct ib_sa_mad
*mad
)
686 struct ib_sa_service_query
*query
=
687 container_of(sa_query
, struct ib_sa_service_query
, sa_query
);
690 struct ib_sa_service_rec rec
;
692 ib_unpack(service_rec_table
, ARRAY_SIZE(service_rec_table
),
694 query
->callback(status
, &rec
, query
->context
);
696 query
->callback(status
, NULL
, query
->context
);
699 static void ib_sa_service_rec_release(struct ib_sa_query
*sa_query
)
701 kfree(container_of(sa_query
, struct ib_sa_service_query
, sa_query
));
705 * ib_sa_service_rec_query - Start Service Record operation
707 * @device:device to send request on
708 * @port_num: port number to send request on
709 * @method:SA method - should be get, set, or delete
710 * @rec:Service Record to send in request
711 * @comp_mask:component mask to send in request
712 * @timeout_ms:time to wait for response
713 * @gfp_mask:GFP mask to use for internal allocations
714 * @callback:function called when request completes, times out or is
716 * @context:opaque user context passed to callback
717 * @sa_query:request context, used to cancel request
719 * Send a Service Record set/get/delete to the SA to register,
720 * unregister or query a service record.
721 * The callback function will be called when the request completes (or
722 * fails); status is 0 for a successful response, -EINTR if the query
723 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
724 * occurred sending the query. The resp parameter of the callback is
725 * only valid if status is 0.
727 * If the return value of ib_sa_service_rec_query() is negative, it is an
728 * error code. Otherwise it is a request ID that can be used to cancel
731 int ib_sa_service_rec_query(struct ib_sa_client
*client
,
732 struct ib_device
*device
, u8 port_num
, u8 method
,
733 struct ib_sa_service_rec
*rec
,
734 ib_sa_comp_mask comp_mask
,
735 int timeout_ms
, gfp_t gfp_mask
,
736 void (*callback
)(int status
,
737 struct ib_sa_service_rec
*resp
,
740 struct ib_sa_query
**sa_query
)
742 struct ib_sa_service_query
*query
;
743 struct ib_sa_device
*sa_dev
= ib_get_client_data(device
, &sa_client
);
744 struct ib_sa_port
*port
;
745 struct ib_mad_agent
*agent
;
746 struct ib_sa_mad
*mad
;
752 port
= &sa_dev
->port
[port_num
- sa_dev
->start_port
];
755 if (method
!= IB_MGMT_METHOD_GET
&&
756 method
!= IB_MGMT_METHOD_SET
&&
757 method
!= IB_SA_METHOD_DELETE
)
760 query
= kmalloc(sizeof *query
, gfp_mask
);
764 query
->sa_query
.mad_buf
= ib_create_send_mad(agent
, 1, 0,
766 IB_MGMT_SA_DATA
, gfp_mask
);
767 if (!query
->sa_query
.mad_buf
) {
772 ib_sa_client_get(client
);
773 query
->sa_query
.client
= client
;
774 query
->callback
= callback
;
775 query
->context
= context
;
777 mad
= query
->sa_query
.mad_buf
->mad
;
778 init_mad(mad
, agent
);
780 query
->sa_query
.callback
= callback
? ib_sa_service_rec_callback
: NULL
;
781 query
->sa_query
.release
= ib_sa_service_rec_release
;
782 query
->sa_query
.port
= port
;
783 mad
->mad_hdr
.method
= method
;
784 mad
->mad_hdr
.attr_id
= cpu_to_be16(IB_SA_ATTR_SERVICE_REC
);
785 mad
->sa_hdr
.comp_mask
= comp_mask
;
787 ib_pack(service_rec_table
, ARRAY_SIZE(service_rec_table
),
790 *sa_query
= &query
->sa_query
;
792 ret
= send_mad(&query
->sa_query
, timeout_ms
, gfp_mask
);
800 ib_sa_client_put(query
->sa_query
.client
);
801 ib_free_send_mad(query
->sa_query
.mad_buf
);
807 EXPORT_SYMBOL(ib_sa_service_rec_query
);
809 static void ib_sa_mcmember_rec_callback(struct ib_sa_query
*sa_query
,
811 struct ib_sa_mad
*mad
)
813 struct ib_sa_mcmember_query
*query
=
814 container_of(sa_query
, struct ib_sa_mcmember_query
, sa_query
);
817 struct ib_sa_mcmember_rec rec
;
819 ib_unpack(mcmember_rec_table
, ARRAY_SIZE(mcmember_rec_table
),
821 query
->callback(status
, &rec
, query
->context
);
823 query
->callback(status
, NULL
, query
->context
);
826 static void ib_sa_mcmember_rec_release(struct ib_sa_query
*sa_query
)
828 kfree(container_of(sa_query
, struct ib_sa_mcmember_query
, sa_query
));
831 int ib_sa_mcmember_rec_query(struct ib_sa_client
*client
,
832 struct ib_device
*device
, u8 port_num
,
834 struct ib_sa_mcmember_rec
*rec
,
835 ib_sa_comp_mask comp_mask
,
836 int timeout_ms
, gfp_t gfp_mask
,
837 void (*callback
)(int status
,
838 struct ib_sa_mcmember_rec
*resp
,
841 struct ib_sa_query
**sa_query
)
843 struct ib_sa_mcmember_query
*query
;
844 struct ib_sa_device
*sa_dev
= ib_get_client_data(device
, &sa_client
);
845 struct ib_sa_port
*port
;
846 struct ib_mad_agent
*agent
;
847 struct ib_sa_mad
*mad
;
853 port
= &sa_dev
->port
[port_num
- sa_dev
->start_port
];
856 query
= kmalloc(sizeof *query
, gfp_mask
);
860 query
->sa_query
.mad_buf
= ib_create_send_mad(agent
, 1, 0,
862 IB_MGMT_SA_DATA
, gfp_mask
);
863 if (!query
->sa_query
.mad_buf
) {
868 ib_sa_client_get(client
);
869 query
->sa_query
.client
= client
;
870 query
->callback
= callback
;
871 query
->context
= context
;
873 mad
= query
->sa_query
.mad_buf
->mad
;
874 init_mad(mad
, agent
);
876 query
->sa_query
.callback
= callback
? ib_sa_mcmember_rec_callback
: NULL
;
877 query
->sa_query
.release
= ib_sa_mcmember_rec_release
;
878 query
->sa_query
.port
= port
;
879 mad
->mad_hdr
.method
= method
;
880 mad
->mad_hdr
.attr_id
= cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC
);
881 mad
->sa_hdr
.comp_mask
= comp_mask
;
883 ib_pack(mcmember_rec_table
, ARRAY_SIZE(mcmember_rec_table
),
886 *sa_query
= &query
->sa_query
;
888 ret
= send_mad(&query
->sa_query
, timeout_ms
, gfp_mask
);
896 ib_sa_client_put(query
->sa_query
.client
);
897 ib_free_send_mad(query
->sa_query
.mad_buf
);
903 EXPORT_SYMBOL(ib_sa_mcmember_rec_query
);
905 static void send_handler(struct ib_mad_agent
*agent
,
906 struct ib_mad_send_wc
*mad_send_wc
)
908 struct ib_sa_query
*query
= mad_send_wc
->send_buf
->context
[0];
912 switch (mad_send_wc
->status
) {
914 /* No callback -- already got recv */
916 case IB_WC_RESP_TIMEOUT_ERR
:
917 query
->callback(query
, -ETIMEDOUT
, NULL
);
919 case IB_WC_WR_FLUSH_ERR
:
920 query
->callback(query
, -EINTR
, NULL
);
923 query
->callback(query
, -EIO
, NULL
);
927 spin_lock_irqsave(&idr_lock
, flags
);
928 idr_remove(&query_idr
, query
->id
);
929 spin_unlock_irqrestore(&idr_lock
, flags
);
931 ib_free_send_mad(mad_send_wc
->send_buf
);
932 kref_put(&query
->sm_ah
->ref
, free_sm_ah
);
933 ib_sa_client_put(query
->client
);
934 query
->release(query
);
937 static void recv_handler(struct ib_mad_agent
*mad_agent
,
938 struct ib_mad_recv_wc
*mad_recv_wc
)
940 struct ib_sa_query
*query
;
941 struct ib_mad_send_buf
*mad_buf
;
943 mad_buf
= (void *) (unsigned long) mad_recv_wc
->wc
->wr_id
;
944 query
= mad_buf
->context
[0];
946 if (query
->callback
) {
947 if (mad_recv_wc
->wc
->status
== IB_WC_SUCCESS
)
948 query
->callback(query
,
949 mad_recv_wc
->recv_buf
.mad
->mad_hdr
.status
?
951 (struct ib_sa_mad
*) mad_recv_wc
->recv_buf
.mad
);
953 query
->callback(query
, -EIO
, NULL
);
956 ib_free_recv_mad(mad_recv_wc
);
959 static void ib_sa_add_one(struct ib_device
*device
)
961 struct ib_sa_device
*sa_dev
;
964 if (rdma_node_get_transport(device
->node_type
) != RDMA_TRANSPORT_IB
)
967 if (device
->node_type
== RDMA_NODE_IB_SWITCH
)
971 e
= device
->phys_port_cnt
;
974 sa_dev
= kmalloc(sizeof *sa_dev
+
975 (e
- s
+ 1) * sizeof (struct ib_sa_port
),
980 sa_dev
->start_port
= s
;
981 sa_dev
->end_port
= e
;
983 for (i
= 0; i
<= e
- s
; ++i
) {
984 sa_dev
->port
[i
].sm_ah
= NULL
;
985 sa_dev
->port
[i
].port_num
= i
+ s
;
986 spin_lock_init(&sa_dev
->port
[i
].ah_lock
);
988 sa_dev
->port
[i
].agent
=
989 ib_register_mad_agent(device
, i
+ s
, IB_QPT_GSI
,
990 NULL
, 0, send_handler
,
991 recv_handler
, sa_dev
);
992 if (IS_ERR(sa_dev
->port
[i
].agent
))
995 INIT_WORK(&sa_dev
->port
[i
].update_task
,
996 update_sm_ah
, &sa_dev
->port
[i
]);
999 ib_set_client_data(device
, &sa_client
, sa_dev
);
1002 * We register our event handler after everything is set up,
1003 * and then update our cached info after the event handler is
1004 * registered to avoid any problems if a port changes state
1005 * during our initialization.
1008 INIT_IB_EVENT_HANDLER(&sa_dev
->event_handler
, device
, ib_sa_event
);
1009 if (ib_register_event_handler(&sa_dev
->event_handler
))
1012 for (i
= 0; i
<= e
- s
; ++i
)
1013 update_sm_ah(&sa_dev
->port
[i
]);
1019 ib_unregister_mad_agent(sa_dev
->port
[i
].agent
);
1026 static void ib_sa_remove_one(struct ib_device
*device
)
1028 struct ib_sa_device
*sa_dev
= ib_get_client_data(device
, &sa_client
);
1034 ib_unregister_event_handler(&sa_dev
->event_handler
);
1036 flush_scheduled_work();
1038 for (i
= 0; i
<= sa_dev
->end_port
- sa_dev
->start_port
; ++i
) {
1039 ib_unregister_mad_agent(sa_dev
->port
[i
].agent
);
1040 kref_put(&sa_dev
->port
[i
].sm_ah
->ref
, free_sm_ah
);
1046 static int __init
ib_sa_init(void)
1050 spin_lock_init(&idr_lock
);
1051 spin_lock_init(&tid_lock
);
1053 get_random_bytes(&tid
, sizeof tid
);
1055 ret
= ib_register_client(&sa_client
);
1057 printk(KERN_ERR
"Couldn't register ib_sa client\n");
1062 static void __exit
ib_sa_cleanup(void)
1064 ib_unregister_client(&sa_client
);
1065 idr_destroy(&query_idr
);
1068 module_init(ib_sa_init
);
1069 module_exit(ib_sa_cleanup
);