2 * Copyright (c) 2005 Cisco Systems. All rights reserved.
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 #include <linux/module.h>
34 #include <linux/init.h>
35 #include <linux/slab.h>
36 #include <linux/err.h>
37 #include <linux/string.h>
38 #include <linux/parser.h>
39 #include <linux/random.h>
40 #include <linux/jiffies.h>
42 #include <asm/atomic.h>
44 #include <scsi/scsi.h>
45 #include <scsi/scsi_device.h>
46 #include <scsi/scsi_dbg.h>
48 #include <scsi/scsi_transport_srp.h>
52 #define DRV_NAME "ib_srp"
53 #define PFX DRV_NAME ": "
54 #define DRV_VERSION "0.2"
55 #define DRV_RELDATE "November 1, 2005"
57 MODULE_AUTHOR("Roland Dreier");
58 MODULE_DESCRIPTION("InfiniBand SCSI RDMA Protocol initiator "
59 "v" DRV_VERSION
" (" DRV_RELDATE
")");
60 MODULE_LICENSE("Dual BSD/GPL");
62 static int srp_sg_tablesize
= SRP_DEF_SG_TABLESIZE
;
63 static int srp_max_iu_len
;
65 module_param(srp_sg_tablesize
, int, 0444);
66 MODULE_PARM_DESC(srp_sg_tablesize
,
67 "Max number of gather/scatter entries per I/O (default is 12, max 255)");
69 static int topspin_workarounds
= 1;
71 module_param(topspin_workarounds
, int, 0444);
72 MODULE_PARM_DESC(topspin_workarounds
,
73 "Enable workarounds for Topspin/Cisco SRP target bugs if != 0");
75 static int mellanox_workarounds
= 1;
77 module_param(mellanox_workarounds
, int, 0444);
78 MODULE_PARM_DESC(mellanox_workarounds
,
79 "Enable workarounds for Mellanox SRP target bugs if != 0");
81 static void srp_add_one(struct ib_device
*device
);
82 static void srp_remove_one(struct ib_device
*device
);
83 static void srp_recv_completion(struct ib_cq
*cq
, void *target_ptr
);
84 static void srp_send_completion(struct ib_cq
*cq
, void *target_ptr
);
85 static int srp_cm_handler(struct ib_cm_id
*cm_id
, struct ib_cm_event
*event
);
86 static struct srp_iu
*__srp_get_tx_iu(struct srp_target_port
*target
,
87 enum srp_iu_type iu_type
);
88 static int __srp_post_send(struct srp_target_port
*target
,
89 struct srp_iu
*iu
, int len
);
91 static struct scsi_transport_template
*ib_srp_transport_template
;
93 static struct ib_client srp_client
= {
96 .remove
= srp_remove_one
99 static struct ib_sa_client srp_sa_client
;
101 static inline struct srp_target_port
*host_to_target(struct Scsi_Host
*host
)
103 return (struct srp_target_port
*) host
->hostdata
;
106 static const char *srp_target_info(struct Scsi_Host
*host
)
108 return host_to_target(host
)->target_name
;
111 static int srp_target_is_topspin(struct srp_target_port
*target
)
113 static const u8 topspin_oui
[3] = { 0x00, 0x05, 0xad };
114 static const u8 cisco_oui
[3] = { 0x00, 0x1b, 0x0d };
116 return topspin_workarounds
&&
117 (!memcmp(&target
->ioc_guid
, topspin_oui
, sizeof topspin_oui
) ||
118 !memcmp(&target
->ioc_guid
, cisco_oui
, sizeof cisco_oui
));
121 static int srp_target_is_mellanox(struct srp_target_port
*target
)
123 static const u8 mellanox_oui
[3] = { 0x00, 0x02, 0xc9 };
125 return mellanox_workarounds
&&
126 !memcmp(&target
->ioc_guid
, mellanox_oui
, sizeof mellanox_oui
);
129 static struct srp_iu
*srp_alloc_iu(struct srp_host
*host
, size_t size
,
131 enum dma_data_direction direction
)
135 iu
= kmalloc(sizeof *iu
, gfp_mask
);
139 iu
->buf
= kzalloc(size
, gfp_mask
);
143 iu
->dma
= ib_dma_map_single(host
->srp_dev
->dev
, iu
->buf
, size
,
145 if (ib_dma_mapping_error(host
->srp_dev
->dev
, iu
->dma
))
149 iu
->direction
= direction
;
161 static void srp_free_iu(struct srp_host
*host
, struct srp_iu
*iu
)
166 ib_dma_unmap_single(host
->srp_dev
->dev
, iu
->dma
, iu
->size
,
172 static void srp_qp_event(struct ib_event
*event
, void *context
)
174 printk(KERN_ERR PFX
"QP event %d\n", event
->event
);
177 static int srp_init_qp(struct srp_target_port
*target
,
180 struct ib_qp_attr
*attr
;
183 attr
= kmalloc(sizeof *attr
, GFP_KERNEL
);
187 ret
= ib_find_pkey(target
->srp_host
->srp_dev
->dev
,
188 target
->srp_host
->port
,
189 be16_to_cpu(target
->path
.pkey
),
194 attr
->qp_state
= IB_QPS_INIT
;
195 attr
->qp_access_flags
= (IB_ACCESS_REMOTE_READ
|
196 IB_ACCESS_REMOTE_WRITE
);
197 attr
->port_num
= target
->srp_host
->port
;
199 ret
= ib_modify_qp(qp
, attr
,
210 static int srp_new_cm_id(struct srp_target_port
*target
)
212 struct ib_cm_id
*new_cm_id
;
214 new_cm_id
= ib_create_cm_id(target
->srp_host
->srp_dev
->dev
,
215 srp_cm_handler
, target
);
216 if (IS_ERR(new_cm_id
))
217 return PTR_ERR(new_cm_id
);
220 ib_destroy_cm_id(target
->cm_id
);
221 target
->cm_id
= new_cm_id
;
226 static int srp_create_target_ib(struct srp_target_port
*target
)
228 struct ib_qp_init_attr
*init_attr
;
231 init_attr
= kzalloc(sizeof *init_attr
, GFP_KERNEL
);
235 target
->recv_cq
= ib_create_cq(target
->srp_host
->srp_dev
->dev
,
236 srp_recv_completion
, NULL
, target
, SRP_RQ_SIZE
, 0);
237 if (IS_ERR(target
->recv_cq
)) {
238 ret
= PTR_ERR(target
->recv_cq
);
242 target
->send_cq
= ib_create_cq(target
->srp_host
->srp_dev
->dev
,
243 srp_send_completion
, NULL
, target
, SRP_SQ_SIZE
, 0);
244 if (IS_ERR(target
->send_cq
)) {
245 ret
= PTR_ERR(target
->send_cq
);
249 ib_req_notify_cq(target
->recv_cq
, IB_CQ_NEXT_COMP
);
251 init_attr
->event_handler
= srp_qp_event
;
252 init_attr
->cap
.max_send_wr
= SRP_SQ_SIZE
;
253 init_attr
->cap
.max_recv_wr
= SRP_RQ_SIZE
;
254 init_attr
->cap
.max_recv_sge
= 1;
255 init_attr
->cap
.max_send_sge
= 1;
256 init_attr
->sq_sig_type
= IB_SIGNAL_ALL_WR
;
257 init_attr
->qp_type
= IB_QPT_RC
;
258 init_attr
->send_cq
= target
->send_cq
;
259 init_attr
->recv_cq
= target
->recv_cq
;
261 target
->qp
= ib_create_qp(target
->srp_host
->srp_dev
->pd
, init_attr
);
262 if (IS_ERR(target
->qp
)) {
263 ret
= PTR_ERR(target
->qp
);
267 ret
= srp_init_qp(target
, target
->qp
);
275 ib_destroy_qp(target
->qp
);
278 ib_destroy_cq(target
->send_cq
);
281 ib_destroy_cq(target
->recv_cq
);
288 static void srp_free_target_ib(struct srp_target_port
*target
)
292 ib_destroy_qp(target
->qp
);
293 ib_destroy_cq(target
->send_cq
);
294 ib_destroy_cq(target
->recv_cq
);
296 for (i
= 0; i
< SRP_RQ_SIZE
; ++i
)
297 srp_free_iu(target
->srp_host
, target
->rx_ring
[i
]);
298 for (i
= 0; i
< SRP_SQ_SIZE
; ++i
)
299 srp_free_iu(target
->srp_host
, target
->tx_ring
[i
]);
302 static void srp_path_rec_completion(int status
,
303 struct ib_sa_path_rec
*pathrec
,
306 struct srp_target_port
*target
= target_ptr
;
308 target
->status
= status
;
310 shost_printk(KERN_ERR
, target
->scsi_host
,
311 PFX
"Got failed path rec status %d\n", status
);
313 target
->path
= *pathrec
;
314 complete(&target
->done
);
317 static int srp_lookup_path(struct srp_target_port
*target
)
319 target
->path
.numb_path
= 1;
321 init_completion(&target
->done
);
323 target
->path_query_id
= ib_sa_path_rec_get(&srp_sa_client
,
324 target
->srp_host
->srp_dev
->dev
,
325 target
->srp_host
->port
,
327 IB_SA_PATH_REC_SERVICE_ID
|
328 IB_SA_PATH_REC_DGID
|
329 IB_SA_PATH_REC_SGID
|
330 IB_SA_PATH_REC_NUMB_PATH
|
332 SRP_PATH_REC_TIMEOUT_MS
,
334 srp_path_rec_completion
,
335 target
, &target
->path_query
);
336 if (target
->path_query_id
< 0)
337 return target
->path_query_id
;
339 wait_for_completion(&target
->done
);
341 if (target
->status
< 0)
342 shost_printk(KERN_WARNING
, target
->scsi_host
,
343 PFX
"Path record query failed\n");
345 return target
->status
;
348 static int srp_send_req(struct srp_target_port
*target
)
351 struct ib_cm_req_param param
;
352 struct srp_login_req priv
;
356 req
= kzalloc(sizeof *req
, GFP_KERNEL
);
360 req
->param
.primary_path
= &target
->path
;
361 req
->param
.alternate_path
= NULL
;
362 req
->param
.service_id
= target
->service_id
;
363 req
->param
.qp_num
= target
->qp
->qp_num
;
364 req
->param
.qp_type
= target
->qp
->qp_type
;
365 req
->param
.private_data
= &req
->priv
;
366 req
->param
.private_data_len
= sizeof req
->priv
;
367 req
->param
.flow_control
= 1;
369 get_random_bytes(&req
->param
.starting_psn
, 4);
370 req
->param
.starting_psn
&= 0xffffff;
373 * Pick some arbitrary defaults here; we could make these
374 * module parameters if anyone cared about setting them.
376 req
->param
.responder_resources
= 4;
377 req
->param
.remote_cm_response_timeout
= 20;
378 req
->param
.local_cm_response_timeout
= 20;
379 req
->param
.retry_count
= 7;
380 req
->param
.rnr_retry_count
= 7;
381 req
->param
.max_cm_retries
= 15;
383 req
->priv
.opcode
= SRP_LOGIN_REQ
;
385 req
->priv
.req_it_iu_len
= cpu_to_be32(srp_max_iu_len
);
386 req
->priv
.req_buf_fmt
= cpu_to_be16(SRP_BUF_FORMAT_DIRECT
|
387 SRP_BUF_FORMAT_INDIRECT
);
389 * In the published SRP specification (draft rev. 16a), the
390 * port identifier format is 8 bytes of ID extension followed
391 * by 8 bytes of GUID. Older drafts put the two halves in the
392 * opposite order, so that the GUID comes first.
394 * Targets conforming to these obsolete drafts can be
395 * recognized by the I/O Class they report.
397 if (target
->io_class
== SRP_REV10_IB_IO_CLASS
) {
398 memcpy(req
->priv
.initiator_port_id
,
399 &target
->path
.sgid
.global
.interface_id
, 8);
400 memcpy(req
->priv
.initiator_port_id
+ 8,
401 &target
->initiator_ext
, 8);
402 memcpy(req
->priv
.target_port_id
, &target
->ioc_guid
, 8);
403 memcpy(req
->priv
.target_port_id
+ 8, &target
->id_ext
, 8);
405 memcpy(req
->priv
.initiator_port_id
,
406 &target
->initiator_ext
, 8);
407 memcpy(req
->priv
.initiator_port_id
+ 8,
408 &target
->path
.sgid
.global
.interface_id
, 8);
409 memcpy(req
->priv
.target_port_id
, &target
->id_ext
, 8);
410 memcpy(req
->priv
.target_port_id
+ 8, &target
->ioc_guid
, 8);
414 * Topspin/Cisco SRP targets will reject our login unless we
415 * zero out the first 8 bytes of our initiator port ID and set
416 * the second 8 bytes to the local node GUID.
418 if (srp_target_is_topspin(target
)) {
419 shost_printk(KERN_DEBUG
, target
->scsi_host
,
420 PFX
"Topspin/Cisco initiator port ID workaround "
421 "activated for target GUID %016llx\n",
422 (unsigned long long) be64_to_cpu(target
->ioc_guid
));
423 memset(req
->priv
.initiator_port_id
, 0, 8);
424 memcpy(req
->priv
.initiator_port_id
+ 8,
425 &target
->srp_host
->srp_dev
->dev
->node_guid
, 8);
428 status
= ib_send_cm_req(target
->cm_id
, &req
->param
);
435 static void srp_disconnect_target(struct srp_target_port
*target
)
437 /* XXX should send SRP_I_LOGOUT request */
439 init_completion(&target
->done
);
440 if (ib_send_cm_dreq(target
->cm_id
, NULL
, 0)) {
441 shost_printk(KERN_DEBUG
, target
->scsi_host
,
442 PFX
"Sending CM DREQ failed\n");
445 wait_for_completion(&target
->done
);
448 static void srp_remove_work(struct work_struct
*work
)
450 struct srp_target_port
*target
=
451 container_of(work
, struct srp_target_port
, work
);
453 spin_lock_irq(target
->scsi_host
->host_lock
);
454 if (target
->state
!= SRP_TARGET_DEAD
) {
455 spin_unlock_irq(target
->scsi_host
->host_lock
);
458 target
->state
= SRP_TARGET_REMOVED
;
459 spin_unlock_irq(target
->scsi_host
->host_lock
);
461 spin_lock(&target
->srp_host
->target_lock
);
462 list_del(&target
->list
);
463 spin_unlock(&target
->srp_host
->target_lock
);
465 srp_remove_host(target
->scsi_host
);
466 scsi_remove_host(target
->scsi_host
);
467 ib_destroy_cm_id(target
->cm_id
);
468 srp_free_target_ib(target
);
469 scsi_host_put(target
->scsi_host
);
472 static int srp_connect_target(struct srp_target_port
*target
)
477 ret
= srp_lookup_path(target
);
482 init_completion(&target
->done
);
483 ret
= srp_send_req(target
);
486 wait_for_completion(&target
->done
);
489 * The CM event handling code will set status to
490 * SRP_PORT_REDIRECT if we get a port redirect REJ
491 * back, or SRP_DLID_REDIRECT if we get a lid/qp
494 switch (target
->status
) {
498 case SRP_PORT_REDIRECT
:
499 ret
= srp_lookup_path(target
);
504 case SRP_DLID_REDIRECT
:
508 /* Our current CM id was stale, and is now in timewait.
509 * Try to reconnect with a new one.
511 if (!retries
-- || srp_new_cm_id(target
)) {
512 shost_printk(KERN_ERR
, target
->scsi_host
, PFX
513 "giving up on stale connection\n");
514 target
->status
= -ECONNRESET
;
515 return target
->status
;
518 shost_printk(KERN_ERR
, target
->scsi_host
, PFX
519 "retrying stale connection\n");
523 return target
->status
;
528 static void srp_unmap_data(struct scsi_cmnd
*scmnd
,
529 struct srp_target_port
*target
,
530 struct srp_request
*req
)
532 if (!scsi_sglist(scmnd
) ||
533 (scmnd
->sc_data_direction
!= DMA_TO_DEVICE
&&
534 scmnd
->sc_data_direction
!= DMA_FROM_DEVICE
))
538 ib_fmr_pool_unmap(req
->fmr
);
542 ib_dma_unmap_sg(target
->srp_host
->srp_dev
->dev
, scsi_sglist(scmnd
),
543 scsi_sg_count(scmnd
), scmnd
->sc_data_direction
);
546 static void srp_remove_req(struct srp_target_port
*target
, struct srp_request
*req
)
548 srp_unmap_data(req
->scmnd
, target
, req
);
549 list_move_tail(&req
->list
, &target
->free_reqs
);
552 static void srp_reset_req(struct srp_target_port
*target
, struct srp_request
*req
)
554 req
->scmnd
->result
= DID_RESET
<< 16;
555 req
->scmnd
->scsi_done(req
->scmnd
);
556 srp_remove_req(target
, req
);
559 static int srp_reconnect_target(struct srp_target_port
*target
)
561 struct ib_qp_attr qp_attr
;
562 struct srp_request
*req
, *tmp
;
566 spin_lock_irq(target
->scsi_host
->host_lock
);
567 if (target
->state
!= SRP_TARGET_LIVE
) {
568 spin_unlock_irq(target
->scsi_host
->host_lock
);
571 target
->state
= SRP_TARGET_CONNECTING
;
572 spin_unlock_irq(target
->scsi_host
->host_lock
);
574 srp_disconnect_target(target
);
576 * Now get a new local CM ID so that we avoid confusing the
577 * target in case things are really fouled up.
579 ret
= srp_new_cm_id(target
);
583 qp_attr
.qp_state
= IB_QPS_RESET
;
584 ret
= ib_modify_qp(target
->qp
, &qp_attr
, IB_QP_STATE
);
588 ret
= srp_init_qp(target
, target
->qp
);
592 while (ib_poll_cq(target
->recv_cq
, 1, &wc
) > 0)
594 while (ib_poll_cq(target
->send_cq
, 1, &wc
) > 0)
597 spin_lock_irq(target
->scsi_host
->host_lock
);
598 list_for_each_entry_safe(req
, tmp
, &target
->req_queue
, list
)
599 srp_reset_req(target
, req
);
600 spin_unlock_irq(target
->scsi_host
->host_lock
);
606 target
->qp_in_error
= 0;
607 ret
= srp_connect_target(target
);
611 spin_lock_irq(target
->scsi_host
->host_lock
);
612 if (target
->state
== SRP_TARGET_CONNECTING
) {
614 target
->state
= SRP_TARGET_LIVE
;
617 spin_unlock_irq(target
->scsi_host
->host_lock
);
622 shost_printk(KERN_ERR
, target
->scsi_host
,
623 PFX
"reconnect failed (%d), removing target port.\n", ret
);
626 * We couldn't reconnect, so kill our target port off.
627 * However, we have to defer the real removal because we might
628 * be in the context of the SCSI error handler now, which
629 * would deadlock if we call scsi_remove_host().
631 spin_lock_irq(target
->scsi_host
->host_lock
);
632 if (target
->state
== SRP_TARGET_CONNECTING
) {
633 target
->state
= SRP_TARGET_DEAD
;
634 INIT_WORK(&target
->work
, srp_remove_work
);
635 schedule_work(&target
->work
);
637 spin_unlock_irq(target
->scsi_host
->host_lock
);
642 static int srp_map_fmr(struct srp_target_port
*target
, struct scatterlist
*scat
,
643 int sg_cnt
, struct srp_request
*req
,
644 struct srp_direct_buf
*buf
)
652 struct srp_device
*dev
= target
->srp_host
->srp_dev
;
653 struct ib_device
*ibdev
= dev
->dev
;
654 struct scatterlist
*sg
;
659 if (srp_target_is_mellanox(target
) &&
660 (ib_sg_dma_address(ibdev
, &scat
[0]) & ~dev
->fmr_page_mask
))
664 scsi_for_each_sg(req
->scmnd
, sg
, sg_cnt
, i
) {
665 unsigned int dma_len
= ib_sg_dma_len(ibdev
, sg
);
667 if (ib_sg_dma_address(ibdev
, sg
) & ~dev
->fmr_page_mask
) {
673 if ((ib_sg_dma_address(ibdev
, sg
) + dma_len
) &
674 ~dev
->fmr_page_mask
) {
684 page_cnt
+= len
>> dev
->fmr_page_shift
;
685 if (page_cnt
> SRP_FMR_SIZE
)
688 dma_pages
= kmalloc(sizeof (u64
) * page_cnt
, GFP_ATOMIC
);
693 scsi_for_each_sg(req
->scmnd
, sg
, sg_cnt
, i
) {
694 unsigned int dma_len
= ib_sg_dma_len(ibdev
, sg
);
696 for (j
= 0; j
< dma_len
; j
+= dev
->fmr_page_size
)
697 dma_pages
[page_cnt
++] =
698 (ib_sg_dma_address(ibdev
, sg
) &
699 dev
->fmr_page_mask
) + j
;
702 req
->fmr
= ib_fmr_pool_map_phys(dev
->fmr_pool
,
703 dma_pages
, page_cnt
, io_addr
);
704 if (IS_ERR(req
->fmr
)) {
705 ret
= PTR_ERR(req
->fmr
);
710 buf
->va
= cpu_to_be64(ib_sg_dma_address(ibdev
, &scat
[0]) &
711 ~dev
->fmr_page_mask
);
712 buf
->key
= cpu_to_be32(req
->fmr
->fmr
->rkey
);
713 buf
->len
= cpu_to_be32(len
);
723 static int srp_map_data(struct scsi_cmnd
*scmnd
, struct srp_target_port
*target
,
724 struct srp_request
*req
)
726 struct scatterlist
*scat
;
727 struct srp_cmd
*cmd
= req
->cmd
->buf
;
728 int len
, nents
, count
;
729 u8 fmt
= SRP_DATA_DESC_DIRECT
;
730 struct srp_device
*dev
;
731 struct ib_device
*ibdev
;
733 if (!scsi_sglist(scmnd
) || scmnd
->sc_data_direction
== DMA_NONE
)
734 return sizeof (struct srp_cmd
);
736 if (scmnd
->sc_data_direction
!= DMA_FROM_DEVICE
&&
737 scmnd
->sc_data_direction
!= DMA_TO_DEVICE
) {
738 shost_printk(KERN_WARNING
, target
->scsi_host
,
739 PFX
"Unhandled data direction %d\n",
740 scmnd
->sc_data_direction
);
744 nents
= scsi_sg_count(scmnd
);
745 scat
= scsi_sglist(scmnd
);
747 dev
= target
->srp_host
->srp_dev
;
750 count
= ib_dma_map_sg(ibdev
, scat
, nents
, scmnd
->sc_data_direction
);
752 fmt
= SRP_DATA_DESC_DIRECT
;
753 len
= sizeof (struct srp_cmd
) + sizeof (struct srp_direct_buf
);
757 * The midlayer only generated a single gather/scatter
758 * entry, or DMA mapping coalesced everything to a
759 * single entry. So a direct descriptor along with
760 * the DMA MR suffices.
762 struct srp_direct_buf
*buf
= (void *) cmd
->add_data
;
764 buf
->va
= cpu_to_be64(ib_sg_dma_address(ibdev
, scat
));
765 buf
->key
= cpu_to_be32(dev
->mr
->rkey
);
766 buf
->len
= cpu_to_be32(ib_sg_dma_len(ibdev
, scat
));
767 } else if (srp_map_fmr(target
, scat
, count
, req
,
768 (void *) cmd
->add_data
)) {
770 * FMR mapping failed, and the scatterlist has more
771 * than one entry. Generate an indirect memory
774 struct srp_indirect_buf
*buf
= (void *) cmd
->add_data
;
775 struct scatterlist
*sg
;
779 fmt
= SRP_DATA_DESC_INDIRECT
;
780 len
= sizeof (struct srp_cmd
) +
781 sizeof (struct srp_indirect_buf
) +
782 count
* sizeof (struct srp_direct_buf
);
784 scsi_for_each_sg(scmnd
, sg
, count
, i
) {
785 unsigned int dma_len
= ib_sg_dma_len(ibdev
, sg
);
787 buf
->desc_list
[i
].va
=
788 cpu_to_be64(ib_sg_dma_address(ibdev
, sg
));
789 buf
->desc_list
[i
].key
=
790 cpu_to_be32(dev
->mr
->rkey
);
791 buf
->desc_list
[i
].len
= cpu_to_be32(dma_len
);
795 if (scmnd
->sc_data_direction
== DMA_TO_DEVICE
)
796 cmd
->data_out_desc_cnt
= count
;
798 cmd
->data_in_desc_cnt
= count
;
801 cpu_to_be64(req
->cmd
->dma
+ sizeof *cmd
+ sizeof *buf
);
802 buf
->table_desc
.key
=
803 cpu_to_be32(target
->srp_host
->srp_dev
->mr
->rkey
);
804 buf
->table_desc
.len
=
805 cpu_to_be32(count
* sizeof (struct srp_direct_buf
));
807 buf
->len
= cpu_to_be32(datalen
);
810 if (scmnd
->sc_data_direction
== DMA_TO_DEVICE
)
811 cmd
->buf_fmt
= fmt
<< 4;
818 static int srp_post_recv(struct srp_target_port
*target
)
823 struct ib_recv_wr wr
, *bad_wr
;
827 spin_lock_irqsave(target
->scsi_host
->host_lock
, flags
);
829 next
= target
->rx_head
& SRP_RQ_MASK
;
831 iu
= target
->rx_ring
[next
];
834 list
.length
= iu
->size
;
835 list
.lkey
= target
->srp_host
->srp_dev
->mr
->lkey
;
841 ret
= ib_post_recv(target
->qp
, &wr
, &bad_wr
);
845 spin_unlock_irqrestore(target
->scsi_host
->host_lock
, flags
);
850 static void srp_process_rsp(struct srp_target_port
*target
, struct srp_rsp
*rsp
)
852 struct srp_request
*req
;
853 struct scsi_cmnd
*scmnd
;
857 delta
= (s32
) be32_to_cpu(rsp
->req_lim_delta
);
859 spin_lock_irqsave(target
->scsi_host
->host_lock
, flags
);
861 target
->req_lim
+= delta
;
863 req
= &target
->req_ring
[rsp
->tag
& ~SRP_TAG_TSK_MGMT
];
865 if (unlikely(rsp
->tag
& SRP_TAG_TSK_MGMT
)) {
866 if (be32_to_cpu(rsp
->resp_data_len
) < 4)
867 req
->tsk_status
= -1;
869 req
->tsk_status
= rsp
->data
[3];
870 complete(&req
->done
);
874 shost_printk(KERN_ERR
, target
->scsi_host
,
875 "Null scmnd for RSP w/tag %016llx\n",
876 (unsigned long long) rsp
->tag
);
877 scmnd
->result
= rsp
->status
;
879 if (rsp
->flags
& SRP_RSP_FLAG_SNSVALID
) {
880 memcpy(scmnd
->sense_buffer
, rsp
->data
+
881 be32_to_cpu(rsp
->resp_data_len
),
882 min_t(int, be32_to_cpu(rsp
->sense_data_len
),
883 SCSI_SENSE_BUFFERSIZE
));
886 if (rsp
->flags
& (SRP_RSP_FLAG_DOOVER
| SRP_RSP_FLAG_DOUNDER
))
887 scsi_set_resid(scmnd
, be32_to_cpu(rsp
->data_out_res_cnt
));
888 else if (rsp
->flags
& (SRP_RSP_FLAG_DIOVER
| SRP_RSP_FLAG_DIUNDER
))
889 scsi_set_resid(scmnd
, be32_to_cpu(rsp
->data_in_res_cnt
));
891 if (!req
->tsk_mgmt
) {
892 scmnd
->host_scribble
= (void *) -1L;
893 scmnd
->scsi_done(scmnd
);
895 srp_remove_req(target
, req
);
900 spin_unlock_irqrestore(target
->scsi_host
->host_lock
, flags
);
903 static int srp_response_common(struct srp_target_port
*target
, s32 req_delta
,
906 struct ib_device
*dev
;
911 dev
= target
->srp_host
->srp_dev
->dev
;
913 spin_lock_irqsave(target
->scsi_host
->host_lock
, flags
);
914 target
->req_lim
+= req_delta
;
916 iu
= __srp_get_tx_iu(target
, SRP_IU_RSP
);
918 shost_printk(KERN_ERR
, target
->scsi_host
, PFX
919 "no IU available to send response\n");
923 ib_dma_sync_single_for_cpu(dev
, iu
->dma
, len
, DMA_TO_DEVICE
);
924 memcpy(iu
->buf
, rsp
, len
);
925 ib_dma_sync_single_for_device(dev
, iu
->dma
, len
, DMA_TO_DEVICE
);
927 err
= __srp_post_send(target
, iu
, len
);
929 shost_printk(KERN_ERR
, target
->scsi_host
, PFX
930 "unable to post response: %d\n", err
);
933 spin_unlock_irqrestore(target
->scsi_host
->host_lock
, flags
);
937 static void srp_process_cred_req(struct srp_target_port
*target
,
938 struct srp_cred_req
*req
)
940 struct srp_cred_rsp rsp
= {
941 .opcode
= SRP_CRED_RSP
,
944 s32 delta
= be32_to_cpu(req
->req_lim_delta
);
946 if (srp_response_common(target
, delta
, &rsp
, sizeof rsp
))
947 shost_printk(KERN_ERR
, target
->scsi_host
, PFX
948 "problems processing SRP_CRED_REQ\n");
951 static void srp_process_aer_req(struct srp_target_port
*target
,
952 struct srp_aer_req
*req
)
954 struct srp_aer_rsp rsp
= {
955 .opcode
= SRP_AER_RSP
,
958 s32 delta
= be32_to_cpu(req
->req_lim_delta
);
960 shost_printk(KERN_ERR
, target
->scsi_host
, PFX
961 "ignoring AER for LUN %llu\n", be64_to_cpu(req
->lun
));
963 if (srp_response_common(target
, delta
, &rsp
, sizeof rsp
))
964 shost_printk(KERN_ERR
, target
->scsi_host
, PFX
965 "problems processing SRP_AER_REQ\n");
968 static void srp_handle_recv(struct srp_target_port
*target
, struct ib_wc
*wc
)
970 struct ib_device
*dev
;
975 iu
= target
->rx_ring
[wc
->wr_id
];
977 dev
= target
->srp_host
->srp_dev
->dev
;
978 ib_dma_sync_single_for_cpu(dev
, iu
->dma
, target
->max_ti_iu_len
,
981 opcode
= *(u8
*) iu
->buf
;
984 shost_printk(KERN_ERR
, target
->scsi_host
,
985 PFX
"recv completion, opcode 0x%02x\n", opcode
);
986 print_hex_dump(KERN_ERR
, "", DUMP_PREFIX_OFFSET
, 8, 1,
987 iu
->buf
, wc
->byte_len
, true);
992 srp_process_rsp(target
, iu
->buf
);
996 srp_process_cred_req(target
, iu
->buf
);
1000 srp_process_aer_req(target
, iu
->buf
);
1004 /* XXX Handle target logout */
1005 shost_printk(KERN_WARNING
, target
->scsi_host
,
1006 PFX
"Got target logout request\n");
1010 shost_printk(KERN_WARNING
, target
->scsi_host
,
1011 PFX
"Unhandled SRP opcode 0x%02x\n", opcode
);
1015 ib_dma_sync_single_for_device(dev
, iu
->dma
, target
->max_ti_iu_len
,
1018 res
= srp_post_recv(target
);
1020 shost_printk(KERN_ERR
, target
->scsi_host
,
1021 PFX
"Recv failed with error code %d\n", res
);
1024 static void srp_recv_completion(struct ib_cq
*cq
, void *target_ptr
)
1026 struct srp_target_port
*target
= target_ptr
;
1029 ib_req_notify_cq(cq
, IB_CQ_NEXT_COMP
);
1030 while (ib_poll_cq(cq
, 1, &wc
) > 0) {
1032 shost_printk(KERN_ERR
, target
->scsi_host
,
1033 PFX
"failed receive status %d\n",
1035 target
->qp_in_error
= 1;
1039 srp_handle_recv(target
, &wc
);
1043 static void srp_send_completion(struct ib_cq
*cq
, void *target_ptr
)
1045 struct srp_target_port
*target
= target_ptr
;
1048 while (ib_poll_cq(cq
, 1, &wc
) > 0) {
1050 shost_printk(KERN_ERR
, target
->scsi_host
,
1051 PFX
"failed send status %d\n",
1053 target
->qp_in_error
= 1;
1062 * Must be called with target->scsi_host->host_lock held to protect
1063 * req_lim and tx_head. Lock cannot be dropped between call here and
1064 * call to __srp_post_send().
1067 * An upper limit for the number of allocated information units for each
1069 * - SRP_IU_CMD: SRP_CMD_SQ_SIZE, since the SCSI mid-layer never queues
1070 * more than Scsi_Host.can_queue requests.
1071 * - SRP_IU_TSK_MGMT: SRP_TSK_MGMT_SQ_SIZE.
1072 * - SRP_IU_RSP: 1, since a conforming SRP target never sends more than
1073 * one unanswered SRP request to an initiator.
1075 static struct srp_iu
*__srp_get_tx_iu(struct srp_target_port
*target
,
1076 enum srp_iu_type iu_type
)
1078 s32 rsv
= (iu_type
== SRP_IU_TSK_MGMT
) ? 0 : SRP_TSK_MGMT_SQ_SIZE
;
1081 srp_send_completion(target
->send_cq
, target
);
1083 if (target
->tx_head
- target
->tx_tail
>= SRP_SQ_SIZE
)
1086 /* Initiator responses to target requests do not consume credits */
1087 if (target
->req_lim
<= rsv
&& iu_type
!= SRP_IU_RSP
) {
1088 ++target
->zero_req_lim
;
1092 iu
= target
->tx_ring
[target
->tx_head
& SRP_SQ_MASK
];
1098 * Must be called with target->scsi_host->host_lock held to protect
1099 * req_lim and tx_head.
1101 static int __srp_post_send(struct srp_target_port
*target
,
1102 struct srp_iu
*iu
, int len
)
1105 struct ib_send_wr wr
, *bad_wr
;
1108 list
.addr
= iu
->dma
;
1110 list
.lkey
= target
->srp_host
->srp_dev
->mr
->lkey
;
1113 wr
.wr_id
= target
->tx_head
& SRP_SQ_MASK
;
1116 wr
.opcode
= IB_WR_SEND
;
1117 wr
.send_flags
= IB_SEND_SIGNALED
;
1119 ret
= ib_post_send(target
->qp
, &wr
, &bad_wr
);
1123 if (iu
->type
!= SRP_IU_RSP
)
1130 static int srp_queuecommand(struct scsi_cmnd
*scmnd
,
1131 void (*done
)(struct scsi_cmnd
*))
1133 struct srp_target_port
*target
= host_to_target(scmnd
->device
->host
);
1134 struct srp_request
*req
;
1136 struct srp_cmd
*cmd
;
1137 struct ib_device
*dev
;
1140 if (target
->state
== SRP_TARGET_CONNECTING
)
1143 if (target
->state
== SRP_TARGET_DEAD
||
1144 target
->state
== SRP_TARGET_REMOVED
) {
1145 scmnd
->result
= DID_BAD_TARGET
<< 16;
1150 iu
= __srp_get_tx_iu(target
, SRP_IU_CMD
);
1154 dev
= target
->srp_host
->srp_dev
->dev
;
1155 ib_dma_sync_single_for_cpu(dev
, iu
->dma
, srp_max_iu_len
,
1158 req
= list_entry(target
->free_reqs
.next
, struct srp_request
, list
);
1160 scmnd
->scsi_done
= done
;
1162 scmnd
->host_scribble
= (void *) (long) req
->index
;
1165 memset(cmd
, 0, sizeof *cmd
);
1167 cmd
->opcode
= SRP_CMD
;
1168 cmd
->lun
= cpu_to_be64((u64
) scmnd
->device
->lun
<< 48);
1169 cmd
->tag
= req
->index
;
1170 memcpy(cmd
->cdb
, scmnd
->cmnd
, scmnd
->cmd_len
);
1175 req
->tsk_mgmt
= NULL
;
1177 len
= srp_map_data(scmnd
, target
, req
);
1179 shost_printk(KERN_ERR
, target
->scsi_host
,
1180 PFX
"Failed to map data\n");
1184 ib_dma_sync_single_for_device(dev
, iu
->dma
, srp_max_iu_len
,
1187 if (__srp_post_send(target
, iu
, len
)) {
1188 shost_printk(KERN_ERR
, target
->scsi_host
, PFX
"Send failed\n");
1192 list_move_tail(&req
->list
, &target
->req_queue
);
1197 srp_unmap_data(scmnd
, target
, req
);
1200 return SCSI_MLQUEUE_HOST_BUSY
;
1203 static int srp_alloc_iu_bufs(struct srp_target_port
*target
)
1207 for (i
= 0; i
< SRP_RQ_SIZE
; ++i
) {
1208 target
->rx_ring
[i
] = srp_alloc_iu(target
->srp_host
,
1209 target
->max_ti_iu_len
,
1210 GFP_KERNEL
, DMA_FROM_DEVICE
);
1211 if (!target
->rx_ring
[i
])
1215 for (i
= 0; i
< SRP_SQ_SIZE
; ++i
) {
1216 target
->tx_ring
[i
] = srp_alloc_iu(target
->srp_host
,
1218 GFP_KERNEL
, DMA_TO_DEVICE
);
1219 if (!target
->tx_ring
[i
])
1226 for (i
= 0; i
< SRP_RQ_SIZE
; ++i
) {
1227 srp_free_iu(target
->srp_host
, target
->rx_ring
[i
]);
1228 target
->rx_ring
[i
] = NULL
;
1231 for (i
= 0; i
< SRP_SQ_SIZE
; ++i
) {
1232 srp_free_iu(target
->srp_host
, target
->tx_ring
[i
]);
1233 target
->tx_ring
[i
] = NULL
;
1239 static void srp_cm_rej_handler(struct ib_cm_id
*cm_id
,
1240 struct ib_cm_event
*event
,
1241 struct srp_target_port
*target
)
1243 struct Scsi_Host
*shost
= target
->scsi_host
;
1244 struct ib_class_port_info
*cpi
;
1247 switch (event
->param
.rej_rcvd
.reason
) {
1248 case IB_CM_REJ_PORT_CM_REDIRECT
:
1249 cpi
= event
->param
.rej_rcvd
.ari
;
1250 target
->path
.dlid
= cpi
->redirect_lid
;
1251 target
->path
.pkey
= cpi
->redirect_pkey
;
1252 cm_id
->remote_cm_qpn
= be32_to_cpu(cpi
->redirect_qp
) & 0x00ffffff;
1253 memcpy(target
->path
.dgid
.raw
, cpi
->redirect_gid
, 16);
1255 target
->status
= target
->path
.dlid
?
1256 SRP_DLID_REDIRECT
: SRP_PORT_REDIRECT
;
1259 case IB_CM_REJ_PORT_REDIRECT
:
1260 if (srp_target_is_topspin(target
)) {
1262 * Topspin/Cisco SRP gateways incorrectly send
1263 * reject reason code 25 when they mean 24
1266 memcpy(target
->path
.dgid
.raw
,
1267 event
->param
.rej_rcvd
.ari
, 16);
1269 shost_printk(KERN_DEBUG
, shost
,
1270 PFX
"Topspin/Cisco redirect to target port GID %016llx%016llx\n",
1271 (unsigned long long) be64_to_cpu(target
->path
.dgid
.global
.subnet_prefix
),
1272 (unsigned long long) be64_to_cpu(target
->path
.dgid
.global
.interface_id
));
1274 target
->status
= SRP_PORT_REDIRECT
;
1276 shost_printk(KERN_WARNING
, shost
,
1277 " REJ reason: IB_CM_REJ_PORT_REDIRECT\n");
1278 target
->status
= -ECONNRESET
;
1282 case IB_CM_REJ_DUPLICATE_LOCAL_COMM_ID
:
1283 shost_printk(KERN_WARNING
, shost
,
1284 " REJ reason: IB_CM_REJ_DUPLICATE_LOCAL_COMM_ID\n");
1285 target
->status
= -ECONNRESET
;
1288 case IB_CM_REJ_CONSUMER_DEFINED
:
1289 opcode
= *(u8
*) event
->private_data
;
1290 if (opcode
== SRP_LOGIN_REJ
) {
1291 struct srp_login_rej
*rej
= event
->private_data
;
1292 u32 reason
= be32_to_cpu(rej
->reason
);
1294 if (reason
== SRP_LOGIN_REJ_REQ_IT_IU_LENGTH_TOO_LARGE
)
1295 shost_printk(KERN_WARNING
, shost
,
1296 PFX
"SRP_LOGIN_REJ: requested max_it_iu_len too large\n");
1298 shost_printk(KERN_WARNING
, shost
,
1299 PFX
"SRP LOGIN REJECTED, reason 0x%08x\n", reason
);
1301 shost_printk(KERN_WARNING
, shost
,
1302 " REJ reason: IB_CM_REJ_CONSUMER_DEFINED,"
1303 " opcode 0x%02x\n", opcode
);
1304 target
->status
= -ECONNRESET
;
1307 case IB_CM_REJ_STALE_CONN
:
1308 shost_printk(KERN_WARNING
, shost
, " REJ reason: stale connection\n");
1309 target
->status
= SRP_STALE_CONN
;
1313 shost_printk(KERN_WARNING
, shost
, " REJ reason 0x%x\n",
1314 event
->param
.rej_rcvd
.reason
);
1315 target
->status
= -ECONNRESET
;
1319 static int srp_cm_handler(struct ib_cm_id
*cm_id
, struct ib_cm_event
*event
)
1321 struct srp_target_port
*target
= cm_id
->context
;
1322 struct ib_qp_attr
*qp_attr
= NULL
;
1328 switch (event
->event
) {
1329 case IB_CM_REQ_ERROR
:
1330 shost_printk(KERN_DEBUG
, target
->scsi_host
,
1331 PFX
"Sending CM REQ failed\n");
1333 target
->status
= -ECONNRESET
;
1336 case IB_CM_REP_RECEIVED
:
1338 opcode
= *(u8
*) event
->private_data
;
1340 if (opcode
== SRP_LOGIN_RSP
) {
1341 struct srp_login_rsp
*rsp
= event
->private_data
;
1343 target
->max_ti_iu_len
= be32_to_cpu(rsp
->max_ti_iu_len
);
1344 target
->req_lim
= be32_to_cpu(rsp
->req_lim_delta
);
1346 target
->scsi_host
->can_queue
= min(target
->req_lim
,
1347 target
->scsi_host
->can_queue
);
1349 shost_printk(KERN_WARNING
, target
->scsi_host
,
1350 PFX
"Unhandled RSP opcode %#x\n", opcode
);
1351 target
->status
= -ECONNRESET
;
1355 if (!target
->rx_ring
[0]) {
1356 target
->status
= srp_alloc_iu_bufs(target
);
1361 qp_attr
= kmalloc(sizeof *qp_attr
, GFP_KERNEL
);
1363 target
->status
= -ENOMEM
;
1367 qp_attr
->qp_state
= IB_QPS_RTR
;
1368 target
->status
= ib_cm_init_qp_attr(cm_id
, qp_attr
, &attr_mask
);
1372 target
->status
= ib_modify_qp(target
->qp
, qp_attr
, attr_mask
);
1376 for (i
= 0; i
< SRP_RQ_SIZE
; i
++) {
1377 target
->status
= srp_post_recv(target
);
1384 qp_attr
->qp_state
= IB_QPS_RTS
;
1385 target
->status
= ib_cm_init_qp_attr(cm_id
, qp_attr
, &attr_mask
);
1389 target
->status
= ib_modify_qp(target
->qp
, qp_attr
, attr_mask
);
1393 target
->status
= ib_send_cm_rtu(cm_id
, NULL
, 0);
1399 case IB_CM_REJ_RECEIVED
:
1400 shost_printk(KERN_DEBUG
, target
->scsi_host
, PFX
"REJ received\n");
1403 srp_cm_rej_handler(cm_id
, event
, target
);
1406 case IB_CM_DREQ_RECEIVED
:
1407 shost_printk(KERN_WARNING
, target
->scsi_host
,
1408 PFX
"DREQ received - connection closed\n");
1409 if (ib_send_cm_drep(cm_id
, NULL
, 0))
1410 shost_printk(KERN_ERR
, target
->scsi_host
,
1411 PFX
"Sending CM DREP failed\n");
1414 case IB_CM_TIMEWAIT_EXIT
:
1415 shost_printk(KERN_ERR
, target
->scsi_host
,
1416 PFX
"connection closed\n");
1422 case IB_CM_MRA_RECEIVED
:
1423 case IB_CM_DREQ_ERROR
:
1424 case IB_CM_DREP_RECEIVED
:
1428 shost_printk(KERN_WARNING
, target
->scsi_host
,
1429 PFX
"Unhandled CM event %d\n", event
->event
);
1434 complete(&target
->done
);
1441 static int srp_send_tsk_mgmt(struct srp_target_port
*target
,
1442 struct srp_request
*req
, u8 func
)
1445 struct srp_tsk_mgmt
*tsk_mgmt
;
1447 spin_lock_irq(target
->scsi_host
->host_lock
);
1449 if (target
->state
== SRP_TARGET_DEAD
||
1450 target
->state
== SRP_TARGET_REMOVED
) {
1451 req
->scmnd
->result
= DID_BAD_TARGET
<< 16;
1455 init_completion(&req
->done
);
1457 iu
= __srp_get_tx_iu(target
, SRP_IU_TSK_MGMT
);
1462 memset(tsk_mgmt
, 0, sizeof *tsk_mgmt
);
1464 tsk_mgmt
->opcode
= SRP_TSK_MGMT
;
1465 tsk_mgmt
->lun
= cpu_to_be64((u64
) req
->scmnd
->device
->lun
<< 48);
1466 tsk_mgmt
->tag
= req
->index
| SRP_TAG_TSK_MGMT
;
1467 tsk_mgmt
->tsk_mgmt_func
= func
;
1468 tsk_mgmt
->task_tag
= req
->index
;
1470 if (__srp_post_send(target
, iu
, sizeof *tsk_mgmt
))
1475 spin_unlock_irq(target
->scsi_host
->host_lock
);
1477 if (!wait_for_completion_timeout(&req
->done
,
1478 msecs_to_jiffies(SRP_ABORT_TIMEOUT_MS
)))
1484 spin_unlock_irq(target
->scsi_host
->host_lock
);
1488 static int srp_find_req(struct srp_target_port
*target
,
1489 struct scsi_cmnd
*scmnd
,
1490 struct srp_request
**req
)
1492 if (scmnd
->host_scribble
== (void *) -1L)
1495 *req
= &target
->req_ring
[(long) scmnd
->host_scribble
];
1500 static int srp_abort(struct scsi_cmnd
*scmnd
)
1502 struct srp_target_port
*target
= host_to_target(scmnd
->device
->host
);
1503 struct srp_request
*req
;
1506 shost_printk(KERN_ERR
, target
->scsi_host
, "SRP abort called\n");
1508 if (target
->qp_in_error
)
1510 if (srp_find_req(target
, scmnd
, &req
))
1512 if (srp_send_tsk_mgmt(target
, req
, SRP_TSK_ABORT_TASK
))
1515 spin_lock_irq(target
->scsi_host
->host_lock
);
1517 if (req
->cmd_done
) {
1518 srp_remove_req(target
, req
);
1519 scmnd
->scsi_done(scmnd
);
1520 } else if (!req
->tsk_status
) {
1521 srp_remove_req(target
, req
);
1522 scmnd
->result
= DID_ABORT
<< 16;
1526 spin_unlock_irq(target
->scsi_host
->host_lock
);
1531 static int srp_reset_device(struct scsi_cmnd
*scmnd
)
1533 struct srp_target_port
*target
= host_to_target(scmnd
->device
->host
);
1534 struct srp_request
*req
, *tmp
;
1536 shost_printk(KERN_ERR
, target
->scsi_host
, "SRP reset_device called\n");
1538 if (target
->qp_in_error
)
1540 if (srp_find_req(target
, scmnd
, &req
))
1542 if (srp_send_tsk_mgmt(target
, req
, SRP_TSK_LUN_RESET
))
1544 if (req
->tsk_status
)
1547 spin_lock_irq(target
->scsi_host
->host_lock
);
1549 list_for_each_entry_safe(req
, tmp
, &target
->req_queue
, list
)
1550 if (req
->scmnd
->device
== scmnd
->device
)
1551 srp_reset_req(target
, req
);
1553 spin_unlock_irq(target
->scsi_host
->host_lock
);
1558 static int srp_reset_host(struct scsi_cmnd
*scmnd
)
1560 struct srp_target_port
*target
= host_to_target(scmnd
->device
->host
);
1563 shost_printk(KERN_ERR
, target
->scsi_host
, PFX
"SRP reset_host called\n");
1565 if (!srp_reconnect_target(target
))
1571 static ssize_t
show_id_ext(struct device
*dev
, struct device_attribute
*attr
,
1574 struct srp_target_port
*target
= host_to_target(class_to_shost(dev
));
1576 if (target
->state
== SRP_TARGET_DEAD
||
1577 target
->state
== SRP_TARGET_REMOVED
)
1580 return sprintf(buf
, "0x%016llx\n",
1581 (unsigned long long) be64_to_cpu(target
->id_ext
));
1584 static ssize_t
show_ioc_guid(struct device
*dev
, struct device_attribute
*attr
,
1587 struct srp_target_port
*target
= host_to_target(class_to_shost(dev
));
1589 if (target
->state
== SRP_TARGET_DEAD
||
1590 target
->state
== SRP_TARGET_REMOVED
)
1593 return sprintf(buf
, "0x%016llx\n",
1594 (unsigned long long) be64_to_cpu(target
->ioc_guid
));
1597 static ssize_t
show_service_id(struct device
*dev
,
1598 struct device_attribute
*attr
, char *buf
)
1600 struct srp_target_port
*target
= host_to_target(class_to_shost(dev
));
1602 if (target
->state
== SRP_TARGET_DEAD
||
1603 target
->state
== SRP_TARGET_REMOVED
)
1606 return sprintf(buf
, "0x%016llx\n",
1607 (unsigned long long) be64_to_cpu(target
->service_id
));
1610 static ssize_t
show_pkey(struct device
*dev
, struct device_attribute
*attr
,
1613 struct srp_target_port
*target
= host_to_target(class_to_shost(dev
));
1615 if (target
->state
== SRP_TARGET_DEAD
||
1616 target
->state
== SRP_TARGET_REMOVED
)
1619 return sprintf(buf
, "0x%04x\n", be16_to_cpu(target
->path
.pkey
));
1622 static ssize_t
show_dgid(struct device
*dev
, struct device_attribute
*attr
,
1625 struct srp_target_port
*target
= host_to_target(class_to_shost(dev
));
1627 if (target
->state
== SRP_TARGET_DEAD
||
1628 target
->state
== SRP_TARGET_REMOVED
)
1631 return sprintf(buf
, "%pI6\n", target
->path
.dgid
.raw
);
1634 static ssize_t
show_orig_dgid(struct device
*dev
,
1635 struct device_attribute
*attr
, char *buf
)
1637 struct srp_target_port
*target
= host_to_target(class_to_shost(dev
));
1639 if (target
->state
== SRP_TARGET_DEAD
||
1640 target
->state
== SRP_TARGET_REMOVED
)
1643 return sprintf(buf
, "%pI6\n", target
->orig_dgid
);
1646 static ssize_t
show_req_lim(struct device
*dev
,
1647 struct device_attribute
*attr
, char *buf
)
1649 struct srp_target_port
*target
= host_to_target(class_to_shost(dev
));
1651 if (target
->state
== SRP_TARGET_DEAD
||
1652 target
->state
== SRP_TARGET_REMOVED
)
1655 return sprintf(buf
, "%d\n", target
->req_lim
);
1658 static ssize_t
show_zero_req_lim(struct device
*dev
,
1659 struct device_attribute
*attr
, char *buf
)
1661 struct srp_target_port
*target
= host_to_target(class_to_shost(dev
));
1663 if (target
->state
== SRP_TARGET_DEAD
||
1664 target
->state
== SRP_TARGET_REMOVED
)
1667 return sprintf(buf
, "%d\n", target
->zero_req_lim
);
1670 static ssize_t
show_local_ib_port(struct device
*dev
,
1671 struct device_attribute
*attr
, char *buf
)
1673 struct srp_target_port
*target
= host_to_target(class_to_shost(dev
));
1675 return sprintf(buf
, "%d\n", target
->srp_host
->port
);
1678 static ssize_t
show_local_ib_device(struct device
*dev
,
1679 struct device_attribute
*attr
, char *buf
)
1681 struct srp_target_port
*target
= host_to_target(class_to_shost(dev
));
1683 return sprintf(buf
, "%s\n", target
->srp_host
->srp_dev
->dev
->name
);
1686 static DEVICE_ATTR(id_ext
, S_IRUGO
, show_id_ext
, NULL
);
1687 static DEVICE_ATTR(ioc_guid
, S_IRUGO
, show_ioc_guid
, NULL
);
1688 static DEVICE_ATTR(service_id
, S_IRUGO
, show_service_id
, NULL
);
1689 static DEVICE_ATTR(pkey
, S_IRUGO
, show_pkey
, NULL
);
1690 static DEVICE_ATTR(dgid
, S_IRUGO
, show_dgid
, NULL
);
1691 static DEVICE_ATTR(orig_dgid
, S_IRUGO
, show_orig_dgid
, NULL
);
1692 static DEVICE_ATTR(req_lim
, S_IRUGO
, show_req_lim
, NULL
);
1693 static DEVICE_ATTR(zero_req_lim
, S_IRUGO
, show_zero_req_lim
, NULL
);
1694 static DEVICE_ATTR(local_ib_port
, S_IRUGO
, show_local_ib_port
, NULL
);
1695 static DEVICE_ATTR(local_ib_device
, S_IRUGO
, show_local_ib_device
, NULL
);
1697 static struct device_attribute
*srp_host_attrs
[] = {
1700 &dev_attr_service_id
,
1703 &dev_attr_orig_dgid
,
1705 &dev_attr_zero_req_lim
,
1706 &dev_attr_local_ib_port
,
1707 &dev_attr_local_ib_device
,
1711 static struct scsi_host_template srp_template
= {
1712 .module
= THIS_MODULE
,
1713 .name
= "InfiniBand SRP initiator",
1714 .proc_name
= DRV_NAME
,
1715 .info
= srp_target_info
,
1716 .queuecommand
= srp_queuecommand
,
1717 .eh_abort_handler
= srp_abort
,
1718 .eh_device_reset_handler
= srp_reset_device
,
1719 .eh_host_reset_handler
= srp_reset_host
,
1720 .can_queue
= SRP_CMD_SQ_SIZE
,
1722 .cmd_per_lun
= SRP_CMD_SQ_SIZE
,
1723 .use_clustering
= ENABLE_CLUSTERING
,
1724 .shost_attrs
= srp_host_attrs
1727 static int srp_add_target(struct srp_host
*host
, struct srp_target_port
*target
)
1729 struct srp_rport_identifiers ids
;
1730 struct srp_rport
*rport
;
1732 sprintf(target
->target_name
, "SRP.T10:%016llX",
1733 (unsigned long long) be64_to_cpu(target
->id_ext
));
1735 if (scsi_add_host(target
->scsi_host
, host
->srp_dev
->dev
->dma_device
))
1738 memcpy(ids
.port_id
, &target
->id_ext
, 8);
1739 memcpy(ids
.port_id
+ 8, &target
->ioc_guid
, 8);
1740 ids
.roles
= SRP_RPORT_ROLE_TARGET
;
1741 rport
= srp_rport_add(target
->scsi_host
, &ids
);
1742 if (IS_ERR(rport
)) {
1743 scsi_remove_host(target
->scsi_host
);
1744 return PTR_ERR(rport
);
1747 spin_lock(&host
->target_lock
);
1748 list_add_tail(&target
->list
, &host
->target_list
);
1749 spin_unlock(&host
->target_lock
);
1751 target
->state
= SRP_TARGET_LIVE
;
1753 scsi_scan_target(&target
->scsi_host
->shost_gendev
,
1754 0, target
->scsi_id
, SCAN_WILD_CARD
, 0);
1759 static void srp_release_dev(struct device
*dev
)
1761 struct srp_host
*host
=
1762 container_of(dev
, struct srp_host
, dev
);
1764 complete(&host
->released
);
1767 static struct class srp_class
= {
1768 .name
= "infiniband_srp",
1769 .dev_release
= srp_release_dev
1773 * Target ports are added by writing
1775 * id_ext=<SRP ID ext>,ioc_guid=<SRP IOC GUID>,dgid=<dest GID>,
1776 * pkey=<P_Key>,service_id=<service ID>
1778 * to the add_target sysfs attribute.
1782 SRP_OPT_ID_EXT
= 1 << 0,
1783 SRP_OPT_IOC_GUID
= 1 << 1,
1784 SRP_OPT_DGID
= 1 << 2,
1785 SRP_OPT_PKEY
= 1 << 3,
1786 SRP_OPT_SERVICE_ID
= 1 << 4,
1787 SRP_OPT_MAX_SECT
= 1 << 5,
1788 SRP_OPT_MAX_CMD_PER_LUN
= 1 << 6,
1789 SRP_OPT_IO_CLASS
= 1 << 7,
1790 SRP_OPT_INITIATOR_EXT
= 1 << 8,
1791 SRP_OPT_ALL
= (SRP_OPT_ID_EXT
|
1795 SRP_OPT_SERVICE_ID
),
1798 static const match_table_t srp_opt_tokens
= {
1799 { SRP_OPT_ID_EXT
, "id_ext=%s" },
1800 { SRP_OPT_IOC_GUID
, "ioc_guid=%s" },
1801 { SRP_OPT_DGID
, "dgid=%s" },
1802 { SRP_OPT_PKEY
, "pkey=%x" },
1803 { SRP_OPT_SERVICE_ID
, "service_id=%s" },
1804 { SRP_OPT_MAX_SECT
, "max_sect=%d" },
1805 { SRP_OPT_MAX_CMD_PER_LUN
, "max_cmd_per_lun=%d" },
1806 { SRP_OPT_IO_CLASS
, "io_class=%x" },
1807 { SRP_OPT_INITIATOR_EXT
, "initiator_ext=%s" },
1808 { SRP_OPT_ERR
, NULL
}
1811 static int srp_parse_options(const char *buf
, struct srp_target_port
*target
)
1813 char *options
, *sep_opt
;
1816 substring_t args
[MAX_OPT_ARGS
];
1822 options
= kstrdup(buf
, GFP_KERNEL
);
1827 while ((p
= strsep(&sep_opt
, ",")) != NULL
) {
1831 token
= match_token(p
, srp_opt_tokens
, args
);
1835 case SRP_OPT_ID_EXT
:
1836 p
= match_strdup(args
);
1841 target
->id_ext
= cpu_to_be64(simple_strtoull(p
, NULL
, 16));
1845 case SRP_OPT_IOC_GUID
:
1846 p
= match_strdup(args
);
1851 target
->ioc_guid
= cpu_to_be64(simple_strtoull(p
, NULL
, 16));
1856 p
= match_strdup(args
);
1861 if (strlen(p
) != 32) {
1862 printk(KERN_WARNING PFX
"bad dest GID parameter '%s'\n", p
);
1867 for (i
= 0; i
< 16; ++i
) {
1868 strlcpy(dgid
, p
+ i
* 2, 3);
1869 target
->path
.dgid
.raw
[i
] = simple_strtoul(dgid
, NULL
, 16);
1872 memcpy(target
->orig_dgid
, target
->path
.dgid
.raw
, 16);
1876 if (match_hex(args
, &token
)) {
1877 printk(KERN_WARNING PFX
"bad P_Key parameter '%s'\n", p
);
1880 target
->path
.pkey
= cpu_to_be16(token
);
1883 case SRP_OPT_SERVICE_ID
:
1884 p
= match_strdup(args
);
1889 target
->service_id
= cpu_to_be64(simple_strtoull(p
, NULL
, 16));
1890 target
->path
.service_id
= target
->service_id
;
1894 case SRP_OPT_MAX_SECT
:
1895 if (match_int(args
, &token
)) {
1896 printk(KERN_WARNING PFX
"bad max sect parameter '%s'\n", p
);
1899 target
->scsi_host
->max_sectors
= token
;
1902 case SRP_OPT_MAX_CMD_PER_LUN
:
1903 if (match_int(args
, &token
)) {
1904 printk(KERN_WARNING PFX
"bad max cmd_per_lun parameter '%s'\n", p
);
1907 target
->scsi_host
->cmd_per_lun
= min(token
, SRP_CMD_SQ_SIZE
);
1910 case SRP_OPT_IO_CLASS
:
1911 if (match_hex(args
, &token
)) {
1912 printk(KERN_WARNING PFX
"bad IO class parameter '%s' \n", p
);
1915 if (token
!= SRP_REV10_IB_IO_CLASS
&&
1916 token
!= SRP_REV16A_IB_IO_CLASS
) {
1917 printk(KERN_WARNING PFX
"unknown IO class parameter value"
1918 " %x specified (use %x or %x).\n",
1919 token
, SRP_REV10_IB_IO_CLASS
, SRP_REV16A_IB_IO_CLASS
);
1922 target
->io_class
= token
;
1925 case SRP_OPT_INITIATOR_EXT
:
1926 p
= match_strdup(args
);
1931 target
->initiator_ext
= cpu_to_be64(simple_strtoull(p
, NULL
, 16));
1936 printk(KERN_WARNING PFX
"unknown parameter or missing value "
1937 "'%s' in target creation request\n", p
);
1942 if ((opt_mask
& SRP_OPT_ALL
) == SRP_OPT_ALL
)
1945 for (i
= 0; i
< ARRAY_SIZE(srp_opt_tokens
); ++i
)
1946 if ((srp_opt_tokens
[i
].token
& SRP_OPT_ALL
) &&
1947 !(srp_opt_tokens
[i
].token
& opt_mask
))
1948 printk(KERN_WARNING PFX
"target creation request is "
1949 "missing parameter '%s'\n",
1950 srp_opt_tokens
[i
].pattern
);
1957 static ssize_t
srp_create_target(struct device
*dev
,
1958 struct device_attribute
*attr
,
1959 const char *buf
, size_t count
)
1961 struct srp_host
*host
=
1962 container_of(dev
, struct srp_host
, dev
);
1963 struct Scsi_Host
*target_host
;
1964 struct srp_target_port
*target
;
1968 target_host
= scsi_host_alloc(&srp_template
,
1969 sizeof (struct srp_target_port
));
1973 target_host
->transportt
= ib_srp_transport_template
;
1974 target_host
->max_lun
= SRP_MAX_LUN
;
1975 target_host
->max_cmd_len
= sizeof ((struct srp_cmd
*) (void *) 0L)->cdb
;
1977 target
= host_to_target(target_host
);
1979 target
->io_class
= SRP_REV16A_IB_IO_CLASS
;
1980 target
->scsi_host
= target_host
;
1981 target
->srp_host
= host
;
1983 INIT_LIST_HEAD(&target
->free_reqs
);
1984 INIT_LIST_HEAD(&target
->req_queue
);
1985 for (i
= 0; i
< SRP_CMD_SQ_SIZE
; ++i
) {
1986 target
->req_ring
[i
].index
= i
;
1987 list_add_tail(&target
->req_ring
[i
].list
, &target
->free_reqs
);
1990 ret
= srp_parse_options(buf
, target
);
1994 ib_query_gid(host
->srp_dev
->dev
, host
->port
, 0, &target
->path
.sgid
);
1996 shost_printk(KERN_DEBUG
, target
->scsi_host
, PFX
1997 "new target: id_ext %016llx ioc_guid %016llx pkey %04x "
1998 "service_id %016llx dgid %pI6\n",
1999 (unsigned long long) be64_to_cpu(target
->id_ext
),
2000 (unsigned long long) be64_to_cpu(target
->ioc_guid
),
2001 be16_to_cpu(target
->path
.pkey
),
2002 (unsigned long long) be64_to_cpu(target
->service_id
),
2003 target
->path
.dgid
.raw
);
2005 ret
= srp_create_target_ib(target
);
2009 ret
= srp_new_cm_id(target
);
2013 target
->qp_in_error
= 0;
2014 ret
= srp_connect_target(target
);
2016 shost_printk(KERN_ERR
, target
->scsi_host
,
2017 PFX
"Connection failed\n");
2021 ret
= srp_add_target(host
, target
);
2023 goto err_disconnect
;
2028 srp_disconnect_target(target
);
2031 ib_destroy_cm_id(target
->cm_id
);
2034 srp_free_target_ib(target
);
2037 scsi_host_put(target_host
);
2042 static DEVICE_ATTR(add_target
, S_IWUSR
, NULL
, srp_create_target
);
2044 static ssize_t
show_ibdev(struct device
*dev
, struct device_attribute
*attr
,
2047 struct srp_host
*host
= container_of(dev
, struct srp_host
, dev
);
2049 return sprintf(buf
, "%s\n", host
->srp_dev
->dev
->name
);
2052 static DEVICE_ATTR(ibdev
, S_IRUGO
, show_ibdev
, NULL
);
2054 static ssize_t
show_port(struct device
*dev
, struct device_attribute
*attr
,
2057 struct srp_host
*host
= container_of(dev
, struct srp_host
, dev
);
2059 return sprintf(buf
, "%d\n", host
->port
);
2062 static DEVICE_ATTR(port
, S_IRUGO
, show_port
, NULL
);
2064 static struct srp_host
*srp_add_port(struct srp_device
*device
, u8 port
)
2066 struct srp_host
*host
;
2068 host
= kzalloc(sizeof *host
, GFP_KERNEL
);
2072 INIT_LIST_HEAD(&host
->target_list
);
2073 spin_lock_init(&host
->target_lock
);
2074 init_completion(&host
->released
);
2075 host
->srp_dev
= device
;
2078 host
->dev
.class = &srp_class
;
2079 host
->dev
.parent
= device
->dev
->dma_device
;
2080 dev_set_name(&host
->dev
, "srp-%s-%d", device
->dev
->name
, port
);
2082 if (device_register(&host
->dev
))
2084 if (device_create_file(&host
->dev
, &dev_attr_add_target
))
2086 if (device_create_file(&host
->dev
, &dev_attr_ibdev
))
2088 if (device_create_file(&host
->dev
, &dev_attr_port
))
2094 device_unregister(&host
->dev
);
2102 static void srp_add_one(struct ib_device
*device
)
2104 struct srp_device
*srp_dev
;
2105 struct ib_device_attr
*dev_attr
;
2106 struct ib_fmr_pool_param fmr_param
;
2107 struct srp_host
*host
;
2110 dev_attr
= kmalloc(sizeof *dev_attr
, GFP_KERNEL
);
2114 if (ib_query_device(device
, dev_attr
)) {
2115 printk(KERN_WARNING PFX
"Query device failed for %s\n",
2120 srp_dev
= kmalloc(sizeof *srp_dev
, GFP_KERNEL
);
2125 * Use the smallest page size supported by the HCA, down to a
2126 * minimum of 512 bytes (which is the smallest sector that a
2127 * SCSI command will ever carry).
2129 srp_dev
->fmr_page_shift
= max(9, ffs(dev_attr
->page_size_cap
) - 1);
2130 srp_dev
->fmr_page_size
= 1 << srp_dev
->fmr_page_shift
;
2131 srp_dev
->fmr_page_mask
= ~((u64
) srp_dev
->fmr_page_size
- 1);
2133 INIT_LIST_HEAD(&srp_dev
->dev_list
);
2135 srp_dev
->dev
= device
;
2136 srp_dev
->pd
= ib_alloc_pd(device
);
2137 if (IS_ERR(srp_dev
->pd
))
2140 srp_dev
->mr
= ib_get_dma_mr(srp_dev
->pd
,
2141 IB_ACCESS_LOCAL_WRITE
|
2142 IB_ACCESS_REMOTE_READ
|
2143 IB_ACCESS_REMOTE_WRITE
);
2144 if (IS_ERR(srp_dev
->mr
))
2147 memset(&fmr_param
, 0, sizeof fmr_param
);
2148 fmr_param
.pool_size
= SRP_FMR_POOL_SIZE
;
2149 fmr_param
.dirty_watermark
= SRP_FMR_DIRTY_SIZE
;
2150 fmr_param
.cache
= 1;
2151 fmr_param
.max_pages_per_fmr
= SRP_FMR_SIZE
;
2152 fmr_param
.page_shift
= srp_dev
->fmr_page_shift
;
2153 fmr_param
.access
= (IB_ACCESS_LOCAL_WRITE
|
2154 IB_ACCESS_REMOTE_WRITE
|
2155 IB_ACCESS_REMOTE_READ
);
2157 srp_dev
->fmr_pool
= ib_create_fmr_pool(srp_dev
->pd
, &fmr_param
);
2158 if (IS_ERR(srp_dev
->fmr_pool
))
2159 srp_dev
->fmr_pool
= NULL
;
2161 if (device
->node_type
== RDMA_NODE_IB_SWITCH
) {
2166 e
= device
->phys_port_cnt
;
2169 for (p
= s
; p
<= e
; ++p
) {
2170 host
= srp_add_port(srp_dev
, p
);
2172 list_add_tail(&host
->list
, &srp_dev
->dev_list
);
2175 ib_set_client_data(device
, &srp_client
, srp_dev
);
2180 ib_dealloc_pd(srp_dev
->pd
);
2189 static void srp_remove_one(struct ib_device
*device
)
2191 struct srp_device
*srp_dev
;
2192 struct srp_host
*host
, *tmp_host
;
2193 LIST_HEAD(target_list
);
2194 struct srp_target_port
*target
, *tmp_target
;
2196 srp_dev
= ib_get_client_data(device
, &srp_client
);
2198 list_for_each_entry_safe(host
, tmp_host
, &srp_dev
->dev_list
, list
) {
2199 device_unregister(&host
->dev
);
2201 * Wait for the sysfs entry to go away, so that no new
2202 * target ports can be created.
2204 wait_for_completion(&host
->released
);
2207 * Mark all target ports as removed, so we stop queueing
2208 * commands and don't try to reconnect.
2210 spin_lock(&host
->target_lock
);
2211 list_for_each_entry(target
, &host
->target_list
, list
) {
2212 spin_lock_irq(target
->scsi_host
->host_lock
);
2213 target
->state
= SRP_TARGET_REMOVED
;
2214 spin_unlock_irq(target
->scsi_host
->host_lock
);
2216 spin_unlock(&host
->target_lock
);
2219 * Wait for any reconnection tasks that may have
2220 * started before we marked our target ports as
2221 * removed, and any target port removal tasks.
2223 flush_scheduled_work();
2225 list_for_each_entry_safe(target
, tmp_target
,
2226 &host
->target_list
, list
) {
2227 srp_remove_host(target
->scsi_host
);
2228 scsi_remove_host(target
->scsi_host
);
2229 srp_disconnect_target(target
);
2230 ib_destroy_cm_id(target
->cm_id
);
2231 srp_free_target_ib(target
);
2232 scsi_host_put(target
->scsi_host
);
2238 if (srp_dev
->fmr_pool
)
2239 ib_destroy_fmr_pool(srp_dev
->fmr_pool
);
2240 ib_dereg_mr(srp_dev
->mr
);
2241 ib_dealloc_pd(srp_dev
->pd
);
2246 static struct srp_function_template ib_srp_transport_functions
= {
2249 static int __init
srp_init_module(void)
2253 BUILD_BUG_ON_NOT_POWER_OF_2(SRP_SQ_SIZE
);
2254 BUILD_BUG_ON_NOT_POWER_OF_2(SRP_RQ_SIZE
);
2256 if (srp_sg_tablesize
> 255) {
2257 printk(KERN_WARNING PFX
"Clamping srp_sg_tablesize to 255\n");
2258 srp_sg_tablesize
= 255;
2261 ib_srp_transport_template
=
2262 srp_attach_transport(&ib_srp_transport_functions
);
2263 if (!ib_srp_transport_template
)
2266 srp_template
.sg_tablesize
= srp_sg_tablesize
;
2267 srp_max_iu_len
= (sizeof (struct srp_cmd
) +
2268 sizeof (struct srp_indirect_buf
) +
2269 srp_sg_tablesize
* 16);
2271 ret
= class_register(&srp_class
);
2273 printk(KERN_ERR PFX
"couldn't register class infiniband_srp\n");
2274 srp_release_transport(ib_srp_transport_template
);
2278 ib_sa_register_client(&srp_sa_client
);
2280 ret
= ib_register_client(&srp_client
);
2282 printk(KERN_ERR PFX
"couldn't register IB client\n");
2283 srp_release_transport(ib_srp_transport_template
);
2284 ib_sa_unregister_client(&srp_sa_client
);
2285 class_unregister(&srp_class
);
2292 static void __exit
srp_cleanup_module(void)
2294 ib_unregister_client(&srp_client
);
2295 ib_sa_unregister_client(&srp_sa_client
);
2296 class_unregister(&srp_class
);
2297 srp_release_transport(ib_srp_transport_template
);
2300 module_init(srp_init_module
);
2301 module_exit(srp_cleanup_module
);