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>
46 #include <linux/workqueue.h>
48 #include <rdma/ib_pack.h>
49 #include <rdma/ib_sa.h>
50 #include <rdma/ib_cache.h>
52 MODULE_AUTHOR("Roland Dreier");
53 MODULE_DESCRIPTION("InfiniBand subnet administration query support");
54 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_port
*port
;
79 struct ib_mad_send_buf
*mad_buf
;
80 struct ib_sa_sm_ah
*sm_ah
;
84 struct ib_sa_service_query
{
85 void (*callback
)(int, struct ib_sa_service_rec
*, void *);
87 struct ib_sa_query sa_query
;
90 struct ib_sa_path_query
{
91 void (*callback
)(int, struct ib_sa_path_rec
*, void *);
93 struct ib_sa_query sa_query
;
96 struct ib_sa_mcmember_query
{
97 void (*callback
)(int, struct ib_sa_mcmember_rec
*, void *);
99 struct ib_sa_query sa_query
;
102 static void ib_sa_add_one(struct ib_device
*device
);
103 static void ib_sa_remove_one(struct ib_device
*device
);
105 static struct ib_client sa_client
= {
107 .add
= ib_sa_add_one
,
108 .remove
= ib_sa_remove_one
111 static spinlock_t idr_lock
;
112 static DEFINE_IDR(query_idr
);
114 static spinlock_t tid_lock
;
117 #define PATH_REC_FIELD(field) \
118 .struct_offset_bytes = offsetof(struct ib_sa_path_rec, field), \
119 .struct_size_bytes = sizeof ((struct ib_sa_path_rec *) 0)->field, \
120 .field_name = "sa_path_rec:" #field
122 static const struct ib_field path_rec_table
[] = {
131 { PATH_REC_FIELD(dgid
),
135 { PATH_REC_FIELD(sgid
),
139 { PATH_REC_FIELD(dlid
),
143 { PATH_REC_FIELD(slid
),
147 { PATH_REC_FIELD(raw_traffic
),
155 { PATH_REC_FIELD(flow_label
),
159 { PATH_REC_FIELD(hop_limit
),
163 { PATH_REC_FIELD(traffic_class
),
167 { PATH_REC_FIELD(reversible
),
171 { PATH_REC_FIELD(numb_path
),
175 { PATH_REC_FIELD(pkey
),
183 { PATH_REC_FIELD(sl
),
187 { PATH_REC_FIELD(mtu_selector
),
191 { PATH_REC_FIELD(mtu
),
195 { PATH_REC_FIELD(rate_selector
),
199 { PATH_REC_FIELD(rate
),
203 { PATH_REC_FIELD(packet_life_time_selector
),
207 { PATH_REC_FIELD(packet_life_time
),
211 { PATH_REC_FIELD(preference
),
221 #define MCMEMBER_REC_FIELD(field) \
222 .struct_offset_bytes = offsetof(struct ib_sa_mcmember_rec, field), \
223 .struct_size_bytes = sizeof ((struct ib_sa_mcmember_rec *) 0)->field, \
224 .field_name = "sa_mcmember_rec:" #field
226 static const struct ib_field mcmember_rec_table
[] = {
227 { MCMEMBER_REC_FIELD(mgid
),
231 { MCMEMBER_REC_FIELD(port_gid
),
235 { MCMEMBER_REC_FIELD(qkey
),
239 { MCMEMBER_REC_FIELD(mlid
),
243 { MCMEMBER_REC_FIELD(mtu_selector
),
247 { MCMEMBER_REC_FIELD(mtu
),
251 { MCMEMBER_REC_FIELD(traffic_class
),
255 { MCMEMBER_REC_FIELD(pkey
),
259 { MCMEMBER_REC_FIELD(rate_selector
),
263 { MCMEMBER_REC_FIELD(rate
),
267 { MCMEMBER_REC_FIELD(packet_life_time_selector
),
271 { MCMEMBER_REC_FIELD(packet_life_time
),
275 { MCMEMBER_REC_FIELD(sl
),
279 { MCMEMBER_REC_FIELD(flow_label
),
283 { MCMEMBER_REC_FIELD(hop_limit
),
287 { MCMEMBER_REC_FIELD(scope
),
291 { MCMEMBER_REC_FIELD(join_state
),
295 { MCMEMBER_REC_FIELD(proxy_join
),
305 #define SERVICE_REC_FIELD(field) \
306 .struct_offset_bytes = offsetof(struct ib_sa_service_rec, field), \
307 .struct_size_bytes = sizeof ((struct ib_sa_service_rec *) 0)->field, \
308 .field_name = "sa_service_rec:" #field
310 static const struct ib_field service_rec_table
[] = {
311 { SERVICE_REC_FIELD(id
),
315 { SERVICE_REC_FIELD(gid
),
319 { SERVICE_REC_FIELD(pkey
),
323 { SERVICE_REC_FIELD(lease
),
327 { SERVICE_REC_FIELD(key
),
331 { SERVICE_REC_FIELD(name
),
335 { SERVICE_REC_FIELD(data8
),
339 { SERVICE_REC_FIELD(data16
),
343 { SERVICE_REC_FIELD(data32
),
347 { SERVICE_REC_FIELD(data64
),
353 static void free_sm_ah(struct kref
*kref
)
355 struct ib_sa_sm_ah
*sm_ah
= container_of(kref
, struct ib_sa_sm_ah
, ref
);
357 ib_destroy_ah(sm_ah
->ah
);
361 static void update_sm_ah(void *port_ptr
)
363 struct ib_sa_port
*port
= port_ptr
;
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
);
381 memset(&ah_attr
, 0, sizeof ah_attr
);
382 ah_attr
.dlid
= port_attr
.sm_lid
;
383 ah_attr
.sl
= port_attr
.sm_sl
;
384 ah_attr
.port_num
= port
->port_num
;
386 new_ah
->ah
= ib_create_ah(port
->agent
->qp
->pd
, &ah_attr
);
387 if (IS_ERR(new_ah
->ah
)) {
388 printk(KERN_WARNING
"Couldn't create new SM AH\n");
393 spin_lock_irq(&port
->ah_lock
);
394 old_ah
= port
->sm_ah
;
395 port
->sm_ah
= new_ah
;
396 spin_unlock_irq(&port
->ah_lock
);
399 kref_put(&old_ah
->ref
, free_sm_ah
);
402 static void ib_sa_event(struct ib_event_handler
*handler
, struct ib_event
*event
)
404 if (event
->event
== IB_EVENT_PORT_ERR
||
405 event
->event
== IB_EVENT_PORT_ACTIVE
||
406 event
->event
== IB_EVENT_LID_CHANGE
||
407 event
->event
== IB_EVENT_PKEY_CHANGE
||
408 event
->event
== IB_EVENT_SM_CHANGE
||
409 event
->event
== IB_EVENT_CLIENT_REREGISTER
) {
410 struct ib_sa_device
*sa_dev
;
411 sa_dev
= container_of(handler
, typeof(*sa_dev
), event_handler
);
413 schedule_work(&sa_dev
->port
[event
->element
.port_num
-
414 sa_dev
->start_port
].update_task
);
419 * ib_sa_cancel_query - try to cancel an SA query
420 * @id:ID of query to cancel
421 * @query:query pointer to cancel
423 * Try to cancel an SA query. If the id and query don't match up or
424 * the query has already completed, nothing is done. Otherwise the
425 * query is canceled and will complete with a status of -EINTR.
427 void ib_sa_cancel_query(int id
, struct ib_sa_query
*query
)
430 struct ib_mad_agent
*agent
;
431 struct ib_mad_send_buf
*mad_buf
;
433 spin_lock_irqsave(&idr_lock
, flags
);
434 if (idr_find(&query_idr
, id
) != query
) {
435 spin_unlock_irqrestore(&idr_lock
, flags
);
438 agent
= query
->port
->agent
;
439 mad_buf
= query
->mad_buf
;
440 spin_unlock_irqrestore(&idr_lock
, flags
);
442 ib_cancel_mad(agent
, mad_buf
);
444 EXPORT_SYMBOL(ib_sa_cancel_query
);
446 int ib_init_ah_from_path(struct ib_device
*device
, u8 port_num
,
447 struct ib_sa_path_rec
*rec
, struct ib_ah_attr
*ah_attr
)
452 memset(ah_attr
, 0, sizeof *ah_attr
);
453 ah_attr
->dlid
= be16_to_cpu(rec
->dlid
);
454 ah_attr
->sl
= rec
->sl
;
455 ah_attr
->src_path_bits
= be16_to_cpu(rec
->slid
) & 0x7f;
456 ah_attr
->port_num
= port_num
;
458 if (rec
->hop_limit
> 1) {
459 ah_attr
->ah_flags
= IB_AH_GRH
;
460 ah_attr
->grh
.dgid
= rec
->dgid
;
462 ret
= ib_find_cached_gid(device
, &rec
->sgid
, &port_num
,
467 ah_attr
->grh
.sgid_index
= gid_index
;
468 ah_attr
->grh
.flow_label
= be32_to_cpu(rec
->flow_label
);
469 ah_attr
->grh
.hop_limit
= rec
->hop_limit
;
470 ah_attr
->grh
.traffic_class
= rec
->traffic_class
;
474 EXPORT_SYMBOL(ib_init_ah_from_path
);
476 static void init_mad(struct ib_sa_mad
*mad
, struct ib_mad_agent
*agent
)
480 memset(mad
, 0, sizeof *mad
);
482 mad
->mad_hdr
.base_version
= IB_MGMT_BASE_VERSION
;
483 mad
->mad_hdr
.mgmt_class
= IB_MGMT_CLASS_SUBN_ADM
;
484 mad
->mad_hdr
.class_version
= IB_SA_CLASS_VERSION
;
486 spin_lock_irqsave(&tid_lock
, flags
);
488 cpu_to_be64(((u64
) agent
->hi_tid
) << 32 | tid
++);
489 spin_unlock_irqrestore(&tid_lock
, flags
);
492 static int send_mad(struct ib_sa_query
*query
, int timeout_ms
, gfp_t gfp_mask
)
498 if (!idr_pre_get(&query_idr
, gfp_mask
))
500 spin_lock_irqsave(&idr_lock
, flags
);
501 ret
= idr_get_new(&query_idr
, query
, &id
);
502 spin_unlock_irqrestore(&idr_lock
, flags
);
508 query
->mad_buf
->timeout_ms
= timeout_ms
;
509 query
->mad_buf
->context
[0] = query
;
512 spin_lock_irqsave(&query
->port
->ah_lock
, flags
);
513 kref_get(&query
->port
->sm_ah
->ref
);
514 query
->sm_ah
= query
->port
->sm_ah
;
515 spin_unlock_irqrestore(&query
->port
->ah_lock
, flags
);
517 query
->mad_buf
->ah
= query
->sm_ah
->ah
;
519 ret
= ib_post_send_mad(query
->mad_buf
, NULL
);
521 spin_lock_irqsave(&idr_lock
, flags
);
522 idr_remove(&query_idr
, id
);
523 spin_unlock_irqrestore(&idr_lock
, flags
);
525 kref_put(&query
->sm_ah
->ref
, free_sm_ah
);
529 * It's not safe to dereference query any more, because the
530 * send may already have completed and freed the query in
533 return ret
? ret
: id
;
536 static void ib_sa_path_rec_callback(struct ib_sa_query
*sa_query
,
538 struct ib_sa_mad
*mad
)
540 struct ib_sa_path_query
*query
=
541 container_of(sa_query
, struct ib_sa_path_query
, sa_query
);
544 struct ib_sa_path_rec rec
;
546 ib_unpack(path_rec_table
, ARRAY_SIZE(path_rec_table
),
548 query
->callback(status
, &rec
, query
->context
);
550 query
->callback(status
, NULL
, query
->context
);
553 static void ib_sa_path_rec_release(struct ib_sa_query
*sa_query
)
555 kfree(container_of(sa_query
, struct ib_sa_path_query
, sa_query
));
559 * ib_sa_path_rec_get - Start a Path get query
560 * @device:device to send query on
561 * @port_num: port number to send query on
562 * @rec:Path Record to send in query
563 * @comp_mask:component mask to send in query
564 * @timeout_ms:time to wait for response
565 * @gfp_mask:GFP mask to use for internal allocations
566 * @callback:function called when query completes, times out or is
568 * @context:opaque user context passed to callback
569 * @sa_query:query context, used to cancel query
571 * Send a Path Record Get query to the SA to look up a path. The
572 * callback function will be called when the query completes (or
573 * fails); status is 0 for a successful response, -EINTR if the query
574 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
575 * occurred sending the query. The resp parameter of the callback is
576 * only valid if status is 0.
578 * If the return value of ib_sa_path_rec_get() is negative, it is an
579 * error code. Otherwise it is a query ID that can be used to cancel
582 int ib_sa_path_rec_get(struct ib_device
*device
, u8 port_num
,
583 struct ib_sa_path_rec
*rec
,
584 ib_sa_comp_mask comp_mask
,
585 int timeout_ms
, gfp_t gfp_mask
,
586 void (*callback
)(int status
,
587 struct ib_sa_path_rec
*resp
,
590 struct ib_sa_query
**sa_query
)
592 struct ib_sa_path_query
*query
;
593 struct ib_sa_device
*sa_dev
= ib_get_client_data(device
, &sa_client
);
594 struct ib_sa_port
*port
;
595 struct ib_mad_agent
*agent
;
596 struct ib_sa_mad
*mad
;
602 port
= &sa_dev
->port
[port_num
- sa_dev
->start_port
];
605 query
= kmalloc(sizeof *query
, gfp_mask
);
609 query
->sa_query
.mad_buf
= ib_create_send_mad(agent
, 1, 0,
611 IB_MGMT_SA_DATA
, gfp_mask
);
612 if (!query
->sa_query
.mad_buf
) {
617 query
->callback
= callback
;
618 query
->context
= context
;
620 mad
= query
->sa_query
.mad_buf
->mad
;
621 init_mad(mad
, agent
);
623 query
->sa_query
.callback
= callback
? ib_sa_path_rec_callback
: NULL
;
624 query
->sa_query
.release
= ib_sa_path_rec_release
;
625 query
->sa_query
.port
= port
;
626 mad
->mad_hdr
.method
= IB_MGMT_METHOD_GET
;
627 mad
->mad_hdr
.attr_id
= cpu_to_be16(IB_SA_ATTR_PATH_REC
);
628 mad
->sa_hdr
.comp_mask
= comp_mask
;
630 ib_pack(path_rec_table
, ARRAY_SIZE(path_rec_table
), rec
, mad
->data
);
632 *sa_query
= &query
->sa_query
;
634 ret
= send_mad(&query
->sa_query
, timeout_ms
, gfp_mask
);
642 ib_free_send_mad(query
->sa_query
.mad_buf
);
648 EXPORT_SYMBOL(ib_sa_path_rec_get
);
650 static void ib_sa_service_rec_callback(struct ib_sa_query
*sa_query
,
652 struct ib_sa_mad
*mad
)
654 struct ib_sa_service_query
*query
=
655 container_of(sa_query
, struct ib_sa_service_query
, sa_query
);
658 struct ib_sa_service_rec rec
;
660 ib_unpack(service_rec_table
, ARRAY_SIZE(service_rec_table
),
662 query
->callback(status
, &rec
, query
->context
);
664 query
->callback(status
, NULL
, query
->context
);
667 static void ib_sa_service_rec_release(struct ib_sa_query
*sa_query
)
669 kfree(container_of(sa_query
, struct ib_sa_service_query
, sa_query
));
673 * ib_sa_service_rec_query - Start Service Record operation
674 * @device:device to send request on
675 * @port_num: port number to send request on
676 * @method:SA method - should be get, set, or delete
677 * @rec:Service Record to send in request
678 * @comp_mask:component mask to send in request
679 * @timeout_ms:time to wait for response
680 * @gfp_mask:GFP mask to use for internal allocations
681 * @callback:function called when request completes, times out or is
683 * @context:opaque user context passed to callback
684 * @sa_query:request context, used to cancel request
686 * Send a Service Record set/get/delete to the SA to register,
687 * unregister or query a service record.
688 * The callback function will be called when the request completes (or
689 * fails); status is 0 for a successful response, -EINTR if the query
690 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
691 * occurred sending the query. The resp parameter of the callback is
692 * only valid if status is 0.
694 * If the return value of ib_sa_service_rec_query() is negative, it is an
695 * error code. Otherwise it is a request ID that can be used to cancel
698 int ib_sa_service_rec_query(struct ib_device
*device
, u8 port_num
, u8 method
,
699 struct ib_sa_service_rec
*rec
,
700 ib_sa_comp_mask comp_mask
,
701 int timeout_ms
, gfp_t gfp_mask
,
702 void (*callback
)(int status
,
703 struct ib_sa_service_rec
*resp
,
706 struct ib_sa_query
**sa_query
)
708 struct ib_sa_service_query
*query
;
709 struct ib_sa_device
*sa_dev
= ib_get_client_data(device
, &sa_client
);
710 struct ib_sa_port
*port
;
711 struct ib_mad_agent
*agent
;
712 struct ib_sa_mad
*mad
;
718 port
= &sa_dev
->port
[port_num
- sa_dev
->start_port
];
721 if (method
!= IB_MGMT_METHOD_GET
&&
722 method
!= IB_MGMT_METHOD_SET
&&
723 method
!= IB_SA_METHOD_DELETE
)
726 query
= kmalloc(sizeof *query
, gfp_mask
);
730 query
->sa_query
.mad_buf
= ib_create_send_mad(agent
, 1, 0,
732 IB_MGMT_SA_DATA
, gfp_mask
);
733 if (!query
->sa_query
.mad_buf
) {
738 query
->callback
= callback
;
739 query
->context
= context
;
741 mad
= query
->sa_query
.mad_buf
->mad
;
742 init_mad(mad
, agent
);
744 query
->sa_query
.callback
= callback
? ib_sa_service_rec_callback
: NULL
;
745 query
->sa_query
.release
= ib_sa_service_rec_release
;
746 query
->sa_query
.port
= port
;
747 mad
->mad_hdr
.method
= method
;
748 mad
->mad_hdr
.attr_id
= cpu_to_be16(IB_SA_ATTR_SERVICE_REC
);
749 mad
->sa_hdr
.comp_mask
= comp_mask
;
751 ib_pack(service_rec_table
, ARRAY_SIZE(service_rec_table
),
754 *sa_query
= &query
->sa_query
;
756 ret
= send_mad(&query
->sa_query
, timeout_ms
, gfp_mask
);
764 ib_free_send_mad(query
->sa_query
.mad_buf
);
770 EXPORT_SYMBOL(ib_sa_service_rec_query
);
772 static void ib_sa_mcmember_rec_callback(struct ib_sa_query
*sa_query
,
774 struct ib_sa_mad
*mad
)
776 struct ib_sa_mcmember_query
*query
=
777 container_of(sa_query
, struct ib_sa_mcmember_query
, sa_query
);
780 struct ib_sa_mcmember_rec rec
;
782 ib_unpack(mcmember_rec_table
, ARRAY_SIZE(mcmember_rec_table
),
784 query
->callback(status
, &rec
, query
->context
);
786 query
->callback(status
, NULL
, query
->context
);
789 static void ib_sa_mcmember_rec_release(struct ib_sa_query
*sa_query
)
791 kfree(container_of(sa_query
, struct ib_sa_mcmember_query
, sa_query
));
794 int ib_sa_mcmember_rec_query(struct ib_device
*device
, u8 port_num
,
796 struct ib_sa_mcmember_rec
*rec
,
797 ib_sa_comp_mask comp_mask
,
798 int timeout_ms
, gfp_t gfp_mask
,
799 void (*callback
)(int status
,
800 struct ib_sa_mcmember_rec
*resp
,
803 struct ib_sa_query
**sa_query
)
805 struct ib_sa_mcmember_query
*query
;
806 struct ib_sa_device
*sa_dev
= ib_get_client_data(device
, &sa_client
);
807 struct ib_sa_port
*port
;
808 struct ib_mad_agent
*agent
;
809 struct ib_sa_mad
*mad
;
815 port
= &sa_dev
->port
[port_num
- sa_dev
->start_port
];
818 query
= kmalloc(sizeof *query
, gfp_mask
);
822 query
->sa_query
.mad_buf
= ib_create_send_mad(agent
, 1, 0,
824 IB_MGMT_SA_DATA
, gfp_mask
);
825 if (!query
->sa_query
.mad_buf
) {
830 query
->callback
= callback
;
831 query
->context
= context
;
833 mad
= query
->sa_query
.mad_buf
->mad
;
834 init_mad(mad
, agent
);
836 query
->sa_query
.callback
= callback
? ib_sa_mcmember_rec_callback
: NULL
;
837 query
->sa_query
.release
= ib_sa_mcmember_rec_release
;
838 query
->sa_query
.port
= port
;
839 mad
->mad_hdr
.method
= method
;
840 mad
->mad_hdr
.attr_id
= cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC
);
841 mad
->sa_hdr
.comp_mask
= comp_mask
;
843 ib_pack(mcmember_rec_table
, ARRAY_SIZE(mcmember_rec_table
),
846 *sa_query
= &query
->sa_query
;
848 ret
= send_mad(&query
->sa_query
, timeout_ms
, gfp_mask
);
856 ib_free_send_mad(query
->sa_query
.mad_buf
);
862 EXPORT_SYMBOL(ib_sa_mcmember_rec_query
);
864 static void send_handler(struct ib_mad_agent
*agent
,
865 struct ib_mad_send_wc
*mad_send_wc
)
867 struct ib_sa_query
*query
= mad_send_wc
->send_buf
->context
[0];
871 switch (mad_send_wc
->status
) {
873 /* No callback -- already got recv */
875 case IB_WC_RESP_TIMEOUT_ERR
:
876 query
->callback(query
, -ETIMEDOUT
, NULL
);
878 case IB_WC_WR_FLUSH_ERR
:
879 query
->callback(query
, -EINTR
, NULL
);
882 query
->callback(query
, -EIO
, NULL
);
886 spin_lock_irqsave(&idr_lock
, flags
);
887 idr_remove(&query_idr
, query
->id
);
888 spin_unlock_irqrestore(&idr_lock
, flags
);
890 ib_free_send_mad(mad_send_wc
->send_buf
);
891 kref_put(&query
->sm_ah
->ref
, free_sm_ah
);
892 query
->release(query
);
895 static void recv_handler(struct ib_mad_agent
*mad_agent
,
896 struct ib_mad_recv_wc
*mad_recv_wc
)
898 struct ib_sa_query
*query
;
899 struct ib_mad_send_buf
*mad_buf
;
901 mad_buf
= (void *) (unsigned long) mad_recv_wc
->wc
->wr_id
;
902 query
= mad_buf
->context
[0];
904 if (query
->callback
) {
905 if (mad_recv_wc
->wc
->status
== IB_WC_SUCCESS
)
906 query
->callback(query
,
907 mad_recv_wc
->recv_buf
.mad
->mad_hdr
.status
?
909 (struct ib_sa_mad
*) mad_recv_wc
->recv_buf
.mad
);
911 query
->callback(query
, -EIO
, NULL
);
914 ib_free_recv_mad(mad_recv_wc
);
917 static void ib_sa_add_one(struct ib_device
*device
)
919 struct ib_sa_device
*sa_dev
;
922 if (device
->node_type
== IB_NODE_SWITCH
)
926 e
= device
->phys_port_cnt
;
929 sa_dev
= kmalloc(sizeof *sa_dev
+
930 (e
- s
+ 1) * sizeof (struct ib_sa_port
),
935 sa_dev
->start_port
= s
;
936 sa_dev
->end_port
= e
;
938 for (i
= 0; i
<= e
- s
; ++i
) {
939 sa_dev
->port
[i
].sm_ah
= NULL
;
940 sa_dev
->port
[i
].port_num
= i
+ s
;
941 spin_lock_init(&sa_dev
->port
[i
].ah_lock
);
943 sa_dev
->port
[i
].agent
=
944 ib_register_mad_agent(device
, i
+ s
, IB_QPT_GSI
,
945 NULL
, 0, send_handler
,
946 recv_handler
, sa_dev
);
947 if (IS_ERR(sa_dev
->port
[i
].agent
))
950 INIT_WORK(&sa_dev
->port
[i
].update_task
,
951 update_sm_ah
, &sa_dev
->port
[i
]);
954 ib_set_client_data(device
, &sa_client
, sa_dev
);
957 * We register our event handler after everything is set up,
958 * and then update our cached info after the event handler is
959 * registered to avoid any problems if a port changes state
960 * during our initialization.
963 INIT_IB_EVENT_HANDLER(&sa_dev
->event_handler
, device
, ib_sa_event
);
964 if (ib_register_event_handler(&sa_dev
->event_handler
))
967 for (i
= 0; i
<= e
- s
; ++i
)
968 update_sm_ah(&sa_dev
->port
[i
]);
974 ib_unregister_mad_agent(sa_dev
->port
[i
].agent
);
981 static void ib_sa_remove_one(struct ib_device
*device
)
983 struct ib_sa_device
*sa_dev
= ib_get_client_data(device
, &sa_client
);
989 ib_unregister_event_handler(&sa_dev
->event_handler
);
991 flush_scheduled_work();
993 for (i
= 0; i
<= sa_dev
->end_port
- sa_dev
->start_port
; ++i
) {
994 ib_unregister_mad_agent(sa_dev
->port
[i
].agent
);
995 kref_put(&sa_dev
->port
[i
].sm_ah
->ref
, free_sm_ah
);
1001 static int __init
ib_sa_init(void)
1005 spin_lock_init(&idr_lock
);
1006 spin_lock_init(&tid_lock
);
1008 get_random_bytes(&tid
, sizeof tid
);
1010 ret
= ib_register_client(&sa_client
);
1012 printk(KERN_ERR
"Couldn't register ib_sa client\n");
1017 static void __exit
ib_sa_cleanup(void)
1019 ib_unregister_client(&sa_client
);
1020 idr_destroy(&query_idr
);
1023 module_init(ib_sa_init
);
1024 module_exit(ib_sa_cleanup
);