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
);
87 static struct scsi_transport_template
*ib_srp_transport_template
;
89 static struct ib_client srp_client
= {
92 .remove
= srp_remove_one
95 static struct ib_sa_client srp_sa_client
;
97 static inline struct srp_target_port
*host_to_target(struct Scsi_Host
*host
)
99 return (struct srp_target_port
*) host
->hostdata
;
102 static const char *srp_target_info(struct Scsi_Host
*host
)
104 return host_to_target(host
)->target_name
;
107 static int srp_target_is_topspin(struct srp_target_port
*target
)
109 static const u8 topspin_oui
[3] = { 0x00, 0x05, 0xad };
110 static const u8 cisco_oui
[3] = { 0x00, 0x1b, 0x0d };
112 return topspin_workarounds
&&
113 (!memcmp(&target
->ioc_guid
, topspin_oui
, sizeof topspin_oui
) ||
114 !memcmp(&target
->ioc_guid
, cisco_oui
, sizeof cisco_oui
));
117 static int srp_target_is_mellanox(struct srp_target_port
*target
)
119 static const u8 mellanox_oui
[3] = { 0x00, 0x02, 0xc9 };
121 return mellanox_workarounds
&&
122 !memcmp(&target
->ioc_guid
, mellanox_oui
, sizeof mellanox_oui
);
125 static struct srp_iu
*srp_alloc_iu(struct srp_host
*host
, size_t size
,
127 enum dma_data_direction direction
)
131 iu
= kmalloc(sizeof *iu
, gfp_mask
);
135 iu
->buf
= kzalloc(size
, gfp_mask
);
139 iu
->dma
= ib_dma_map_single(host
->srp_dev
->dev
, iu
->buf
, size
,
141 if (ib_dma_mapping_error(host
->srp_dev
->dev
, iu
->dma
))
145 iu
->direction
= direction
;
157 static void srp_free_iu(struct srp_host
*host
, struct srp_iu
*iu
)
162 ib_dma_unmap_single(host
->srp_dev
->dev
, iu
->dma
, iu
->size
,
168 static void srp_qp_event(struct ib_event
*event
, void *context
)
170 printk(KERN_ERR PFX
"QP event %d\n", event
->event
);
173 static int srp_init_qp(struct srp_target_port
*target
,
176 struct ib_qp_attr
*attr
;
179 attr
= kmalloc(sizeof *attr
, GFP_KERNEL
);
183 ret
= ib_find_pkey(target
->srp_host
->srp_dev
->dev
,
184 target
->srp_host
->port
,
185 be16_to_cpu(target
->path
.pkey
),
190 attr
->qp_state
= IB_QPS_INIT
;
191 attr
->qp_access_flags
= (IB_ACCESS_REMOTE_READ
|
192 IB_ACCESS_REMOTE_WRITE
);
193 attr
->port_num
= target
->srp_host
->port
;
195 ret
= ib_modify_qp(qp
, attr
,
206 static int srp_new_cm_id(struct srp_target_port
*target
)
208 struct ib_cm_id
*new_cm_id
;
210 new_cm_id
= ib_create_cm_id(target
->srp_host
->srp_dev
->dev
,
211 srp_cm_handler
, target
);
212 if (IS_ERR(new_cm_id
))
213 return PTR_ERR(new_cm_id
);
216 ib_destroy_cm_id(target
->cm_id
);
217 target
->cm_id
= new_cm_id
;
222 static int srp_create_target_ib(struct srp_target_port
*target
)
224 struct ib_qp_init_attr
*init_attr
;
227 init_attr
= kzalloc(sizeof *init_attr
, GFP_KERNEL
);
231 target
->recv_cq
= ib_create_cq(target
->srp_host
->srp_dev
->dev
,
232 srp_recv_completion
, NULL
, target
, SRP_RQ_SIZE
, 0);
233 if (IS_ERR(target
->recv_cq
)) {
234 ret
= PTR_ERR(target
->recv_cq
);
238 target
->send_cq
= ib_create_cq(target
->srp_host
->srp_dev
->dev
,
239 srp_send_completion
, NULL
, target
, SRP_SQ_SIZE
, 0);
240 if (IS_ERR(target
->send_cq
)) {
241 ret
= PTR_ERR(target
->send_cq
);
245 ib_req_notify_cq(target
->recv_cq
, IB_CQ_NEXT_COMP
);
247 init_attr
->event_handler
= srp_qp_event
;
248 init_attr
->cap
.max_send_wr
= SRP_SQ_SIZE
;
249 init_attr
->cap
.max_recv_wr
= SRP_RQ_SIZE
;
250 init_attr
->cap
.max_recv_sge
= 1;
251 init_attr
->cap
.max_send_sge
= 1;
252 init_attr
->sq_sig_type
= IB_SIGNAL_ALL_WR
;
253 init_attr
->qp_type
= IB_QPT_RC
;
254 init_attr
->send_cq
= target
->send_cq
;
255 init_attr
->recv_cq
= target
->recv_cq
;
257 target
->qp
= ib_create_qp(target
->srp_host
->srp_dev
->pd
, init_attr
);
258 if (IS_ERR(target
->qp
)) {
259 ret
= PTR_ERR(target
->qp
);
263 ret
= srp_init_qp(target
, target
->qp
);
271 ib_destroy_qp(target
->qp
);
274 ib_destroy_cq(target
->send_cq
);
277 ib_destroy_cq(target
->recv_cq
);
284 static void srp_free_target_ib(struct srp_target_port
*target
)
288 ib_destroy_qp(target
->qp
);
289 ib_destroy_cq(target
->send_cq
);
290 ib_destroy_cq(target
->recv_cq
);
292 for (i
= 0; i
< SRP_RQ_SIZE
; ++i
)
293 srp_free_iu(target
->srp_host
, target
->rx_ring
[i
]);
294 for (i
= 0; i
< SRP_SQ_SIZE
; ++i
)
295 srp_free_iu(target
->srp_host
, target
->tx_ring
[i
]);
298 static void srp_path_rec_completion(int status
,
299 struct ib_sa_path_rec
*pathrec
,
302 struct srp_target_port
*target
= target_ptr
;
304 target
->status
= status
;
306 shost_printk(KERN_ERR
, target
->scsi_host
,
307 PFX
"Got failed path rec status %d\n", status
);
309 target
->path
= *pathrec
;
310 complete(&target
->done
);
313 static int srp_lookup_path(struct srp_target_port
*target
)
315 target
->path
.numb_path
= 1;
317 init_completion(&target
->done
);
319 target
->path_query_id
= ib_sa_path_rec_get(&srp_sa_client
,
320 target
->srp_host
->srp_dev
->dev
,
321 target
->srp_host
->port
,
323 IB_SA_PATH_REC_SERVICE_ID
|
324 IB_SA_PATH_REC_DGID
|
325 IB_SA_PATH_REC_SGID
|
326 IB_SA_PATH_REC_NUMB_PATH
|
328 SRP_PATH_REC_TIMEOUT_MS
,
330 srp_path_rec_completion
,
331 target
, &target
->path_query
);
332 if (target
->path_query_id
< 0)
333 return target
->path_query_id
;
335 wait_for_completion(&target
->done
);
337 if (target
->status
< 0)
338 shost_printk(KERN_WARNING
, target
->scsi_host
,
339 PFX
"Path record query failed\n");
341 return target
->status
;
344 static int srp_send_req(struct srp_target_port
*target
)
347 struct ib_cm_req_param param
;
348 struct srp_login_req priv
;
352 req
= kzalloc(sizeof *req
, GFP_KERNEL
);
356 req
->param
.primary_path
= &target
->path
;
357 req
->param
.alternate_path
= NULL
;
358 req
->param
.service_id
= target
->service_id
;
359 req
->param
.qp_num
= target
->qp
->qp_num
;
360 req
->param
.qp_type
= target
->qp
->qp_type
;
361 req
->param
.private_data
= &req
->priv
;
362 req
->param
.private_data_len
= sizeof req
->priv
;
363 req
->param
.flow_control
= 1;
365 get_random_bytes(&req
->param
.starting_psn
, 4);
366 req
->param
.starting_psn
&= 0xffffff;
369 * Pick some arbitrary defaults here; we could make these
370 * module parameters if anyone cared about setting them.
372 req
->param
.responder_resources
= 4;
373 req
->param
.remote_cm_response_timeout
= 20;
374 req
->param
.local_cm_response_timeout
= 20;
375 req
->param
.retry_count
= 7;
376 req
->param
.rnr_retry_count
= 7;
377 req
->param
.max_cm_retries
= 15;
379 req
->priv
.opcode
= SRP_LOGIN_REQ
;
381 req
->priv
.req_it_iu_len
= cpu_to_be32(srp_max_iu_len
);
382 req
->priv
.req_buf_fmt
= cpu_to_be16(SRP_BUF_FORMAT_DIRECT
|
383 SRP_BUF_FORMAT_INDIRECT
);
385 * In the published SRP specification (draft rev. 16a), the
386 * port identifier format is 8 bytes of ID extension followed
387 * by 8 bytes of GUID. Older drafts put the two halves in the
388 * opposite order, so that the GUID comes first.
390 * Targets conforming to these obsolete drafts can be
391 * recognized by the I/O Class they report.
393 if (target
->io_class
== SRP_REV10_IB_IO_CLASS
) {
394 memcpy(req
->priv
.initiator_port_id
,
395 &target
->path
.sgid
.global
.interface_id
, 8);
396 memcpy(req
->priv
.initiator_port_id
+ 8,
397 &target
->initiator_ext
, 8);
398 memcpy(req
->priv
.target_port_id
, &target
->ioc_guid
, 8);
399 memcpy(req
->priv
.target_port_id
+ 8, &target
->id_ext
, 8);
401 memcpy(req
->priv
.initiator_port_id
,
402 &target
->initiator_ext
, 8);
403 memcpy(req
->priv
.initiator_port_id
+ 8,
404 &target
->path
.sgid
.global
.interface_id
, 8);
405 memcpy(req
->priv
.target_port_id
, &target
->id_ext
, 8);
406 memcpy(req
->priv
.target_port_id
+ 8, &target
->ioc_guid
, 8);
410 * Topspin/Cisco SRP targets will reject our login unless we
411 * zero out the first 8 bytes of our initiator port ID and set
412 * the second 8 bytes to the local node GUID.
414 if (srp_target_is_topspin(target
)) {
415 shost_printk(KERN_DEBUG
, target
->scsi_host
,
416 PFX
"Topspin/Cisco initiator port ID workaround "
417 "activated for target GUID %016llx\n",
418 (unsigned long long) be64_to_cpu(target
->ioc_guid
));
419 memset(req
->priv
.initiator_port_id
, 0, 8);
420 memcpy(req
->priv
.initiator_port_id
+ 8,
421 &target
->srp_host
->srp_dev
->dev
->node_guid
, 8);
424 status
= ib_send_cm_req(target
->cm_id
, &req
->param
);
431 static void srp_disconnect_target(struct srp_target_port
*target
)
433 /* XXX should send SRP_I_LOGOUT request */
435 init_completion(&target
->done
);
436 if (ib_send_cm_dreq(target
->cm_id
, NULL
, 0)) {
437 shost_printk(KERN_DEBUG
, target
->scsi_host
,
438 PFX
"Sending CM DREQ failed\n");
441 wait_for_completion(&target
->done
);
444 static bool srp_change_state(struct srp_target_port
*target
,
445 enum srp_target_state old
,
446 enum srp_target_state
new)
448 bool changed
= false;
450 spin_lock_irq(target
->scsi_host
->host_lock
);
451 if (target
->state
== old
) {
455 spin_unlock_irq(target
->scsi_host
->host_lock
);
459 static void srp_remove_work(struct work_struct
*work
)
461 struct srp_target_port
*target
=
462 container_of(work
, struct srp_target_port
, work
);
464 if (!srp_change_state(target
, SRP_TARGET_DEAD
, SRP_TARGET_REMOVED
))
467 spin_lock(&target
->srp_host
->target_lock
);
468 list_del(&target
->list
);
469 spin_unlock(&target
->srp_host
->target_lock
);
471 srp_remove_host(target
->scsi_host
);
472 scsi_remove_host(target
->scsi_host
);
473 ib_destroy_cm_id(target
->cm_id
);
474 srp_free_target_ib(target
);
475 scsi_host_put(target
->scsi_host
);
478 static int srp_connect_target(struct srp_target_port
*target
)
483 ret
= srp_lookup_path(target
);
488 init_completion(&target
->done
);
489 ret
= srp_send_req(target
);
492 wait_for_completion(&target
->done
);
495 * The CM event handling code will set status to
496 * SRP_PORT_REDIRECT if we get a port redirect REJ
497 * back, or SRP_DLID_REDIRECT if we get a lid/qp
500 switch (target
->status
) {
504 case SRP_PORT_REDIRECT
:
505 ret
= srp_lookup_path(target
);
510 case SRP_DLID_REDIRECT
:
514 /* Our current CM id was stale, and is now in timewait.
515 * Try to reconnect with a new one.
517 if (!retries
-- || srp_new_cm_id(target
)) {
518 shost_printk(KERN_ERR
, target
->scsi_host
, PFX
519 "giving up on stale connection\n");
520 target
->status
= -ECONNRESET
;
521 return target
->status
;
524 shost_printk(KERN_ERR
, target
->scsi_host
, PFX
525 "retrying stale connection\n");
529 return target
->status
;
534 static void srp_unmap_data(struct scsi_cmnd
*scmnd
,
535 struct srp_target_port
*target
,
536 struct srp_request
*req
)
538 if (!scsi_sglist(scmnd
) ||
539 (scmnd
->sc_data_direction
!= DMA_TO_DEVICE
&&
540 scmnd
->sc_data_direction
!= DMA_FROM_DEVICE
))
544 ib_fmr_pool_unmap(req
->fmr
);
548 ib_dma_unmap_sg(target
->srp_host
->srp_dev
->dev
, scsi_sglist(scmnd
),
549 scsi_sg_count(scmnd
), scmnd
->sc_data_direction
);
552 static void srp_remove_req(struct srp_target_port
*target
, struct srp_request
*req
)
554 srp_unmap_data(req
->scmnd
, target
, req
);
556 list_add_tail(&req
->list
, &target
->free_reqs
);
559 static void srp_reset_req(struct srp_target_port
*target
, struct srp_request
*req
)
561 req
->scmnd
->result
= DID_RESET
<< 16;
562 req
->scmnd
->scsi_done(req
->scmnd
);
563 srp_remove_req(target
, req
);
566 static int srp_reconnect_target(struct srp_target_port
*target
)
568 struct ib_qp_attr qp_attr
;
572 if (!srp_change_state(target
, SRP_TARGET_LIVE
, SRP_TARGET_CONNECTING
))
575 srp_disconnect_target(target
);
577 * Now get a new local CM ID so that we avoid confusing the
578 * target in case things are really fouled up.
580 ret
= srp_new_cm_id(target
);
584 qp_attr
.qp_state
= IB_QPS_RESET
;
585 ret
= ib_modify_qp(target
->qp
, &qp_attr
, IB_QP_STATE
);
589 ret
= srp_init_qp(target
, target
->qp
);
593 while (ib_poll_cq(target
->recv_cq
, 1, &wc
) > 0)
595 while (ib_poll_cq(target
->send_cq
, 1, &wc
) > 0)
598 spin_lock_irq(target
->scsi_host
->host_lock
);
599 for (i
= 0; i
< SRP_CMD_SQ_SIZE
; ++i
) {
600 struct srp_request
*req
= &target
->req_ring
[i
];
602 srp_reset_req(target
, req
);
604 spin_unlock_irq(target
->scsi_host
->host_lock
);
606 INIT_LIST_HEAD(&target
->free_tx
);
607 for (i
= 0; i
< SRP_SQ_SIZE
; ++i
)
608 list_add(&target
->tx_ring
[i
]->list
, &target
->free_tx
);
610 target
->qp_in_error
= 0;
611 ret
= srp_connect_target(target
);
615 if (!srp_change_state(target
, SRP_TARGET_CONNECTING
, SRP_TARGET_LIVE
))
621 shost_printk(KERN_ERR
, target
->scsi_host
,
622 PFX
"reconnect failed (%d), removing target port.\n", ret
);
625 * We couldn't reconnect, so kill our target port off.
626 * However, we have to defer the real removal because we
627 * are in the context of the SCSI error handler now, which
628 * will deadlock if we call scsi_remove_host().
630 * Schedule our work inside the lock to avoid a race with
631 * the flush_scheduled_work() in srp_remove_one().
633 spin_lock_irq(target
->scsi_host
->host_lock
);
634 if (target
->state
== SRP_TARGET_CONNECTING
) {
635 target
->state
= SRP_TARGET_DEAD
;
636 INIT_WORK(&target
->work
, srp_remove_work
);
637 schedule_work(&target
->work
);
639 spin_unlock_irq(target
->scsi_host
->host_lock
);
644 static int srp_map_fmr(struct srp_target_port
*target
, struct scatterlist
*scat
,
645 int sg_cnt
, struct srp_request
*req
,
646 struct srp_direct_buf
*buf
)
654 struct srp_device
*dev
= target
->srp_host
->srp_dev
;
655 struct ib_device
*ibdev
= dev
->dev
;
656 struct scatterlist
*sg
;
661 if (srp_target_is_mellanox(target
) &&
662 (ib_sg_dma_address(ibdev
, &scat
[0]) & ~dev
->fmr_page_mask
))
666 scsi_for_each_sg(req
->scmnd
, sg
, sg_cnt
, i
) {
667 unsigned int dma_len
= ib_sg_dma_len(ibdev
, sg
);
669 if (ib_sg_dma_address(ibdev
, sg
) & ~dev
->fmr_page_mask
) {
675 if ((ib_sg_dma_address(ibdev
, sg
) + dma_len
) &
676 ~dev
->fmr_page_mask
) {
686 page_cnt
+= len
>> dev
->fmr_page_shift
;
687 if (page_cnt
> SRP_FMR_SIZE
)
690 dma_pages
= kmalloc(sizeof (u64
) * page_cnt
, GFP_ATOMIC
);
695 scsi_for_each_sg(req
->scmnd
, sg
, sg_cnt
, i
) {
696 unsigned int dma_len
= ib_sg_dma_len(ibdev
, sg
);
698 for (j
= 0; j
< dma_len
; j
+= dev
->fmr_page_size
)
699 dma_pages
[page_cnt
++] =
700 (ib_sg_dma_address(ibdev
, sg
) &
701 dev
->fmr_page_mask
) + j
;
704 req
->fmr
= ib_fmr_pool_map_phys(dev
->fmr_pool
,
705 dma_pages
, page_cnt
, io_addr
);
706 if (IS_ERR(req
->fmr
)) {
707 ret
= PTR_ERR(req
->fmr
);
712 buf
->va
= cpu_to_be64(ib_sg_dma_address(ibdev
, &scat
[0]) &
713 ~dev
->fmr_page_mask
);
714 buf
->key
= cpu_to_be32(req
->fmr
->fmr
->rkey
);
715 buf
->len
= cpu_to_be32(len
);
725 static int srp_map_data(struct scsi_cmnd
*scmnd
, struct srp_target_port
*target
,
726 struct srp_request
*req
)
728 struct scatterlist
*scat
;
729 struct srp_cmd
*cmd
= req
->cmd
->buf
;
730 int len
, nents
, count
;
731 u8 fmt
= SRP_DATA_DESC_DIRECT
;
732 struct srp_device
*dev
;
733 struct ib_device
*ibdev
;
735 if (!scsi_sglist(scmnd
) || scmnd
->sc_data_direction
== DMA_NONE
)
736 return sizeof (struct srp_cmd
);
738 if (scmnd
->sc_data_direction
!= DMA_FROM_DEVICE
&&
739 scmnd
->sc_data_direction
!= DMA_TO_DEVICE
) {
740 shost_printk(KERN_WARNING
, target
->scsi_host
,
741 PFX
"Unhandled data direction %d\n",
742 scmnd
->sc_data_direction
);
746 nents
= scsi_sg_count(scmnd
);
747 scat
= scsi_sglist(scmnd
);
749 dev
= target
->srp_host
->srp_dev
;
752 count
= ib_dma_map_sg(ibdev
, scat
, nents
, scmnd
->sc_data_direction
);
754 fmt
= SRP_DATA_DESC_DIRECT
;
755 len
= sizeof (struct srp_cmd
) + sizeof (struct srp_direct_buf
);
759 * The midlayer only generated a single gather/scatter
760 * entry, or DMA mapping coalesced everything to a
761 * single entry. So a direct descriptor along with
762 * the DMA MR suffices.
764 struct srp_direct_buf
*buf
= (void *) cmd
->add_data
;
766 buf
->va
= cpu_to_be64(ib_sg_dma_address(ibdev
, scat
));
767 buf
->key
= cpu_to_be32(dev
->mr
->rkey
);
768 buf
->len
= cpu_to_be32(ib_sg_dma_len(ibdev
, scat
));
769 } else if (srp_map_fmr(target
, scat
, count
, req
,
770 (void *) cmd
->add_data
)) {
772 * FMR mapping failed, and the scatterlist has more
773 * than one entry. Generate an indirect memory
776 struct srp_indirect_buf
*buf
= (void *) cmd
->add_data
;
777 struct scatterlist
*sg
;
781 fmt
= SRP_DATA_DESC_INDIRECT
;
782 len
= sizeof (struct srp_cmd
) +
783 sizeof (struct srp_indirect_buf
) +
784 count
* sizeof (struct srp_direct_buf
);
786 scsi_for_each_sg(scmnd
, sg
, count
, i
) {
787 unsigned int dma_len
= ib_sg_dma_len(ibdev
, sg
);
789 buf
->desc_list
[i
].va
=
790 cpu_to_be64(ib_sg_dma_address(ibdev
, sg
));
791 buf
->desc_list
[i
].key
=
792 cpu_to_be32(dev
->mr
->rkey
);
793 buf
->desc_list
[i
].len
= cpu_to_be32(dma_len
);
797 if (scmnd
->sc_data_direction
== DMA_TO_DEVICE
)
798 cmd
->data_out_desc_cnt
= count
;
800 cmd
->data_in_desc_cnt
= count
;
803 cpu_to_be64(req
->cmd
->dma
+ sizeof *cmd
+ sizeof *buf
);
804 buf
->table_desc
.key
=
805 cpu_to_be32(target
->srp_host
->srp_dev
->mr
->rkey
);
806 buf
->table_desc
.len
=
807 cpu_to_be32(count
* sizeof (struct srp_direct_buf
));
809 buf
->len
= cpu_to_be32(datalen
);
812 if (scmnd
->sc_data_direction
== DMA_TO_DEVICE
)
813 cmd
->buf_fmt
= fmt
<< 4;
821 * Return an IU and possible credit to the free pool
823 static void srp_put_tx_iu(struct srp_target_port
*target
, struct srp_iu
*iu
,
824 enum srp_iu_type iu_type
)
828 spin_lock_irqsave(target
->scsi_host
->host_lock
, flags
);
829 list_add(&iu
->list
, &target
->free_tx
);
830 if (iu_type
!= SRP_IU_RSP
)
832 spin_unlock_irqrestore(target
->scsi_host
->host_lock
, flags
);
836 * Must be called with target->scsi_host->host_lock held to protect
837 * req_lim and free_tx. If IU is not sent, it must be returned using
841 * An upper limit for the number of allocated information units for each
843 * - SRP_IU_CMD: SRP_CMD_SQ_SIZE, since the SCSI mid-layer never queues
844 * more than Scsi_Host.can_queue requests.
845 * - SRP_IU_TSK_MGMT: SRP_TSK_MGMT_SQ_SIZE.
846 * - SRP_IU_RSP: 1, since a conforming SRP target never sends more than
847 * one unanswered SRP request to an initiator.
849 static struct srp_iu
*__srp_get_tx_iu(struct srp_target_port
*target
,
850 enum srp_iu_type iu_type
)
852 s32 rsv
= (iu_type
== SRP_IU_TSK_MGMT
) ? 0 : SRP_TSK_MGMT_SQ_SIZE
;
855 srp_send_completion(target
->send_cq
, target
);
857 if (list_empty(&target
->free_tx
))
860 /* Initiator responses to target requests do not consume credits */
861 if (iu_type
!= SRP_IU_RSP
) {
862 if (target
->req_lim
<= rsv
) {
863 ++target
->zero_req_lim
;
870 iu
= list_first_entry(&target
->free_tx
, struct srp_iu
, list
);
875 static int srp_post_send(struct srp_target_port
*target
,
876 struct srp_iu
*iu
, int len
)
879 struct ib_send_wr wr
, *bad_wr
;
883 list
.lkey
= target
->srp_host
->srp_dev
->mr
->lkey
;
886 wr
.wr_id
= (uintptr_t) iu
;
889 wr
.opcode
= IB_WR_SEND
;
890 wr
.send_flags
= IB_SEND_SIGNALED
;
892 return ib_post_send(target
->qp
, &wr
, &bad_wr
);
895 static int srp_post_recv(struct srp_target_port
*target
, struct srp_iu
*iu
)
897 struct ib_recv_wr wr
, *bad_wr
;
901 list
.length
= iu
->size
;
902 list
.lkey
= target
->srp_host
->srp_dev
->mr
->lkey
;
905 wr
.wr_id
= (uintptr_t) iu
;
909 return ib_post_recv(target
->qp
, &wr
, &bad_wr
);
912 static void srp_process_rsp(struct srp_target_port
*target
, struct srp_rsp
*rsp
)
914 struct srp_request
*req
;
915 struct scsi_cmnd
*scmnd
;
919 delta
= (s32
) be32_to_cpu(rsp
->req_lim_delta
);
921 spin_lock_irqsave(target
->scsi_host
->host_lock
, flags
);
923 target
->req_lim
+= delta
;
925 if (unlikely(rsp
->tag
& SRP_TAG_TSK_MGMT
)) {
926 target
->tsk_mgmt_status
= -1;
927 if (be32_to_cpu(rsp
->resp_data_len
) >= 4)
928 target
->tsk_mgmt_status
= rsp
->data
[3];
929 complete(&target
->tsk_mgmt_done
);
931 req
= &target
->req_ring
[rsp
->tag
];
934 shost_printk(KERN_ERR
, target
->scsi_host
,
935 "Null scmnd for RSP w/tag %016llx\n",
936 (unsigned long long) rsp
->tag
);
937 scmnd
->result
= rsp
->status
;
939 if (rsp
->flags
& SRP_RSP_FLAG_SNSVALID
) {
940 memcpy(scmnd
->sense_buffer
, rsp
->data
+
941 be32_to_cpu(rsp
->resp_data_len
),
942 min_t(int, be32_to_cpu(rsp
->sense_data_len
),
943 SCSI_SENSE_BUFFERSIZE
));
946 if (rsp
->flags
& (SRP_RSP_FLAG_DOOVER
| SRP_RSP_FLAG_DOUNDER
))
947 scsi_set_resid(scmnd
, be32_to_cpu(rsp
->data_out_res_cnt
));
948 else if (rsp
->flags
& (SRP_RSP_FLAG_DIOVER
| SRP_RSP_FLAG_DIUNDER
))
949 scsi_set_resid(scmnd
, be32_to_cpu(rsp
->data_in_res_cnt
));
951 scmnd
->host_scribble
= NULL
;
952 scmnd
->scsi_done(scmnd
);
953 srp_remove_req(target
, req
);
956 spin_unlock_irqrestore(target
->scsi_host
->host_lock
, flags
);
959 static int srp_response_common(struct srp_target_port
*target
, s32 req_delta
,
962 struct ib_device
*dev
= target
->srp_host
->srp_dev
->dev
;
967 spin_lock_irqsave(target
->scsi_host
->host_lock
, flags
);
968 target
->req_lim
+= req_delta
;
969 iu
= __srp_get_tx_iu(target
, SRP_IU_RSP
);
970 spin_unlock_irqrestore(target
->scsi_host
->host_lock
, flags
);
973 shost_printk(KERN_ERR
, target
->scsi_host
, PFX
974 "no IU available to send response\n");
978 ib_dma_sync_single_for_cpu(dev
, iu
->dma
, len
, DMA_TO_DEVICE
);
979 memcpy(iu
->buf
, rsp
, len
);
980 ib_dma_sync_single_for_device(dev
, iu
->dma
, len
, DMA_TO_DEVICE
);
982 err
= srp_post_send(target
, iu
, len
);
984 shost_printk(KERN_ERR
, target
->scsi_host
, PFX
985 "unable to post response: %d\n", err
);
986 srp_put_tx_iu(target
, iu
, SRP_IU_RSP
);
992 static void srp_process_cred_req(struct srp_target_port
*target
,
993 struct srp_cred_req
*req
)
995 struct srp_cred_rsp rsp
= {
996 .opcode
= SRP_CRED_RSP
,
999 s32 delta
= be32_to_cpu(req
->req_lim_delta
);
1001 if (srp_response_common(target
, delta
, &rsp
, sizeof rsp
))
1002 shost_printk(KERN_ERR
, target
->scsi_host
, PFX
1003 "problems processing SRP_CRED_REQ\n");
1006 static void srp_process_aer_req(struct srp_target_port
*target
,
1007 struct srp_aer_req
*req
)
1009 struct srp_aer_rsp rsp
= {
1010 .opcode
= SRP_AER_RSP
,
1013 s32 delta
= be32_to_cpu(req
->req_lim_delta
);
1015 shost_printk(KERN_ERR
, target
->scsi_host
, PFX
1016 "ignoring AER for LUN %llu\n", be64_to_cpu(req
->lun
));
1018 if (srp_response_common(target
, delta
, &rsp
, sizeof rsp
))
1019 shost_printk(KERN_ERR
, target
->scsi_host
, PFX
1020 "problems processing SRP_AER_REQ\n");
1023 static void srp_handle_recv(struct srp_target_port
*target
, struct ib_wc
*wc
)
1025 struct ib_device
*dev
= target
->srp_host
->srp_dev
->dev
;
1026 struct srp_iu
*iu
= (struct srp_iu
*) wc
->wr_id
;
1030 ib_dma_sync_single_for_cpu(dev
, iu
->dma
, target
->max_ti_iu_len
,
1033 opcode
= *(u8
*) iu
->buf
;
1036 shost_printk(KERN_ERR
, target
->scsi_host
,
1037 PFX
"recv completion, opcode 0x%02x\n", opcode
);
1038 print_hex_dump(KERN_ERR
, "", DUMP_PREFIX_OFFSET
, 8, 1,
1039 iu
->buf
, wc
->byte_len
, true);
1044 srp_process_rsp(target
, iu
->buf
);
1048 srp_process_cred_req(target
, iu
->buf
);
1052 srp_process_aer_req(target
, iu
->buf
);
1056 /* XXX Handle target logout */
1057 shost_printk(KERN_WARNING
, target
->scsi_host
,
1058 PFX
"Got target logout request\n");
1062 shost_printk(KERN_WARNING
, target
->scsi_host
,
1063 PFX
"Unhandled SRP opcode 0x%02x\n", opcode
);
1067 ib_dma_sync_single_for_device(dev
, iu
->dma
, target
->max_ti_iu_len
,
1070 res
= srp_post_recv(target
, iu
);
1072 shost_printk(KERN_ERR
, target
->scsi_host
,
1073 PFX
"Recv failed with error code %d\n", res
);
1076 static void srp_recv_completion(struct ib_cq
*cq
, void *target_ptr
)
1078 struct srp_target_port
*target
= target_ptr
;
1081 ib_req_notify_cq(cq
, IB_CQ_NEXT_COMP
);
1082 while (ib_poll_cq(cq
, 1, &wc
) > 0) {
1084 shost_printk(KERN_ERR
, target
->scsi_host
,
1085 PFX
"failed receive status %d\n",
1087 target
->qp_in_error
= 1;
1091 srp_handle_recv(target
, &wc
);
1095 static void srp_send_completion(struct ib_cq
*cq
, void *target_ptr
)
1097 struct srp_target_port
*target
= target_ptr
;
1101 while (ib_poll_cq(cq
, 1, &wc
) > 0) {
1103 shost_printk(KERN_ERR
, target
->scsi_host
,
1104 PFX
"failed send status %d\n",
1106 target
->qp_in_error
= 1;
1110 iu
= (struct srp_iu
*) wc
.wr_id
;
1111 list_add(&iu
->list
, &target
->free_tx
);
1115 static int srp_queuecommand(struct Scsi_Host
*shost
, struct scsi_cmnd
*scmnd
)
1117 struct srp_target_port
*target
= host_to_target(shost
);
1118 struct srp_request
*req
;
1120 struct srp_cmd
*cmd
;
1121 struct ib_device
*dev
;
1122 unsigned long flags
;
1125 if (target
->state
== SRP_TARGET_CONNECTING
)
1128 if (target
->state
== SRP_TARGET_DEAD
||
1129 target
->state
== SRP_TARGET_REMOVED
) {
1130 scmnd
->result
= DID_BAD_TARGET
<< 16;
1131 scmnd
->scsi_done(scmnd
);
1135 spin_lock_irqsave(shost
->host_lock
, flags
);
1136 iu
= __srp_get_tx_iu(target
, SRP_IU_CMD
);
1138 req
= list_first_entry(&target
->free_reqs
, struct srp_request
,
1140 list_del(&req
->list
);
1142 spin_unlock_irqrestore(shost
->host_lock
, flags
);
1147 dev
= target
->srp_host
->srp_dev
->dev
;
1148 ib_dma_sync_single_for_cpu(dev
, iu
->dma
, srp_max_iu_len
,
1152 scmnd
->host_scribble
= (void *) req
;
1155 memset(cmd
, 0, sizeof *cmd
);
1157 cmd
->opcode
= SRP_CMD
;
1158 cmd
->lun
= cpu_to_be64((u64
) scmnd
->device
->lun
<< 48);
1159 cmd
->tag
= req
->index
;
1160 memcpy(cmd
->cdb
, scmnd
->cmnd
, scmnd
->cmd_len
);
1165 len
= srp_map_data(scmnd
, target
, req
);
1167 shost_printk(KERN_ERR
, target
->scsi_host
,
1168 PFX
"Failed to map data\n");
1172 ib_dma_sync_single_for_device(dev
, iu
->dma
, srp_max_iu_len
,
1175 if (srp_post_send(target
, iu
, len
)) {
1176 shost_printk(KERN_ERR
, target
->scsi_host
, PFX
"Send failed\n");
1183 srp_unmap_data(scmnd
, target
, req
);
1186 srp_put_tx_iu(target
, iu
, SRP_IU_CMD
);
1188 spin_lock_irqsave(shost
->host_lock
, flags
);
1189 list_add(&req
->list
, &target
->free_reqs
);
1190 spin_unlock_irqrestore(shost
->host_lock
, flags
);
1193 return SCSI_MLQUEUE_HOST_BUSY
;
1196 static int srp_alloc_iu_bufs(struct srp_target_port
*target
)
1200 for (i
= 0; i
< SRP_RQ_SIZE
; ++i
) {
1201 target
->rx_ring
[i
] = srp_alloc_iu(target
->srp_host
,
1202 target
->max_ti_iu_len
,
1203 GFP_KERNEL
, DMA_FROM_DEVICE
);
1204 if (!target
->rx_ring
[i
])
1208 for (i
= 0; i
< SRP_SQ_SIZE
; ++i
) {
1209 target
->tx_ring
[i
] = srp_alloc_iu(target
->srp_host
,
1211 GFP_KERNEL
, DMA_TO_DEVICE
);
1212 if (!target
->tx_ring
[i
])
1215 list_add(&target
->tx_ring
[i
]->list
, &target
->free_tx
);
1221 for (i
= 0; i
< SRP_RQ_SIZE
; ++i
) {
1222 srp_free_iu(target
->srp_host
, target
->rx_ring
[i
]);
1223 target
->rx_ring
[i
] = NULL
;
1226 for (i
= 0; i
< SRP_SQ_SIZE
; ++i
) {
1227 srp_free_iu(target
->srp_host
, target
->tx_ring
[i
]);
1228 target
->tx_ring
[i
] = NULL
;
1234 static void srp_cm_rej_handler(struct ib_cm_id
*cm_id
,
1235 struct ib_cm_event
*event
,
1236 struct srp_target_port
*target
)
1238 struct Scsi_Host
*shost
= target
->scsi_host
;
1239 struct ib_class_port_info
*cpi
;
1242 switch (event
->param
.rej_rcvd
.reason
) {
1243 case IB_CM_REJ_PORT_CM_REDIRECT
:
1244 cpi
= event
->param
.rej_rcvd
.ari
;
1245 target
->path
.dlid
= cpi
->redirect_lid
;
1246 target
->path
.pkey
= cpi
->redirect_pkey
;
1247 cm_id
->remote_cm_qpn
= be32_to_cpu(cpi
->redirect_qp
) & 0x00ffffff;
1248 memcpy(target
->path
.dgid
.raw
, cpi
->redirect_gid
, 16);
1250 target
->status
= target
->path
.dlid
?
1251 SRP_DLID_REDIRECT
: SRP_PORT_REDIRECT
;
1254 case IB_CM_REJ_PORT_REDIRECT
:
1255 if (srp_target_is_topspin(target
)) {
1257 * Topspin/Cisco SRP gateways incorrectly send
1258 * reject reason code 25 when they mean 24
1261 memcpy(target
->path
.dgid
.raw
,
1262 event
->param
.rej_rcvd
.ari
, 16);
1264 shost_printk(KERN_DEBUG
, shost
,
1265 PFX
"Topspin/Cisco redirect to target port GID %016llx%016llx\n",
1266 (unsigned long long) be64_to_cpu(target
->path
.dgid
.global
.subnet_prefix
),
1267 (unsigned long long) be64_to_cpu(target
->path
.dgid
.global
.interface_id
));
1269 target
->status
= SRP_PORT_REDIRECT
;
1271 shost_printk(KERN_WARNING
, shost
,
1272 " REJ reason: IB_CM_REJ_PORT_REDIRECT\n");
1273 target
->status
= -ECONNRESET
;
1277 case IB_CM_REJ_DUPLICATE_LOCAL_COMM_ID
:
1278 shost_printk(KERN_WARNING
, shost
,
1279 " REJ reason: IB_CM_REJ_DUPLICATE_LOCAL_COMM_ID\n");
1280 target
->status
= -ECONNRESET
;
1283 case IB_CM_REJ_CONSUMER_DEFINED
:
1284 opcode
= *(u8
*) event
->private_data
;
1285 if (opcode
== SRP_LOGIN_REJ
) {
1286 struct srp_login_rej
*rej
= event
->private_data
;
1287 u32 reason
= be32_to_cpu(rej
->reason
);
1289 if (reason
== SRP_LOGIN_REJ_REQ_IT_IU_LENGTH_TOO_LARGE
)
1290 shost_printk(KERN_WARNING
, shost
,
1291 PFX
"SRP_LOGIN_REJ: requested max_it_iu_len too large\n");
1293 shost_printk(KERN_WARNING
, shost
,
1294 PFX
"SRP LOGIN REJECTED, reason 0x%08x\n", reason
);
1296 shost_printk(KERN_WARNING
, shost
,
1297 " REJ reason: IB_CM_REJ_CONSUMER_DEFINED,"
1298 " opcode 0x%02x\n", opcode
);
1299 target
->status
= -ECONNRESET
;
1302 case IB_CM_REJ_STALE_CONN
:
1303 shost_printk(KERN_WARNING
, shost
, " REJ reason: stale connection\n");
1304 target
->status
= SRP_STALE_CONN
;
1308 shost_printk(KERN_WARNING
, shost
, " REJ reason 0x%x\n",
1309 event
->param
.rej_rcvd
.reason
);
1310 target
->status
= -ECONNRESET
;
1314 static int srp_cm_handler(struct ib_cm_id
*cm_id
, struct ib_cm_event
*event
)
1316 struct srp_target_port
*target
= cm_id
->context
;
1317 struct ib_qp_attr
*qp_attr
= NULL
;
1323 switch (event
->event
) {
1324 case IB_CM_REQ_ERROR
:
1325 shost_printk(KERN_DEBUG
, target
->scsi_host
,
1326 PFX
"Sending CM REQ failed\n");
1328 target
->status
= -ECONNRESET
;
1331 case IB_CM_REP_RECEIVED
:
1333 opcode
= *(u8
*) event
->private_data
;
1335 if (opcode
== SRP_LOGIN_RSP
) {
1336 struct srp_login_rsp
*rsp
= event
->private_data
;
1338 target
->max_ti_iu_len
= be32_to_cpu(rsp
->max_ti_iu_len
);
1339 target
->req_lim
= be32_to_cpu(rsp
->req_lim_delta
);
1342 * Reserve credits for task management so we don't
1343 * bounce requests back to the SCSI mid-layer.
1345 target
->scsi_host
->can_queue
1346 = min(target
->req_lim
- SRP_TSK_MGMT_SQ_SIZE
,
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 struct srp_iu
*iu
= target
->rx_ring
[i
];
1378 target
->status
= srp_post_recv(target
, iu
);
1385 qp_attr
->qp_state
= IB_QPS_RTS
;
1386 target
->status
= ib_cm_init_qp_attr(cm_id
, qp_attr
, &attr_mask
);
1390 target
->status
= ib_modify_qp(target
->qp
, qp_attr
, attr_mask
);
1394 target
->status
= ib_send_cm_rtu(cm_id
, NULL
, 0);
1400 case IB_CM_REJ_RECEIVED
:
1401 shost_printk(KERN_DEBUG
, target
->scsi_host
, PFX
"REJ received\n");
1404 srp_cm_rej_handler(cm_id
, event
, target
);
1407 case IB_CM_DREQ_RECEIVED
:
1408 shost_printk(KERN_WARNING
, target
->scsi_host
,
1409 PFX
"DREQ received - connection closed\n");
1410 if (ib_send_cm_drep(cm_id
, NULL
, 0))
1411 shost_printk(KERN_ERR
, target
->scsi_host
,
1412 PFX
"Sending CM DREP failed\n");
1415 case IB_CM_TIMEWAIT_EXIT
:
1416 shost_printk(KERN_ERR
, target
->scsi_host
,
1417 PFX
"connection closed\n");
1423 case IB_CM_MRA_RECEIVED
:
1424 case IB_CM_DREQ_ERROR
:
1425 case IB_CM_DREP_RECEIVED
:
1429 shost_printk(KERN_WARNING
, target
->scsi_host
,
1430 PFX
"Unhandled CM event %d\n", event
->event
);
1435 complete(&target
->done
);
1442 static int srp_send_tsk_mgmt(struct srp_target_port
*target
,
1443 u64 req_tag
, unsigned int lun
, u8 func
)
1445 struct ib_device
*dev
= target
->srp_host
->srp_dev
->dev
;
1447 struct srp_tsk_mgmt
*tsk_mgmt
;
1449 if (target
->state
== SRP_TARGET_DEAD
||
1450 target
->state
== SRP_TARGET_REMOVED
)
1453 init_completion(&target
->tsk_mgmt_done
);
1455 spin_lock_irq(target
->scsi_host
->host_lock
);
1456 iu
= __srp_get_tx_iu(target
, SRP_IU_TSK_MGMT
);
1457 spin_unlock_irq(target
->scsi_host
->host_lock
);
1462 ib_dma_sync_single_for_cpu(dev
, iu
->dma
, sizeof *tsk_mgmt
,
1465 memset(tsk_mgmt
, 0, sizeof *tsk_mgmt
);
1467 tsk_mgmt
->opcode
= SRP_TSK_MGMT
;
1468 tsk_mgmt
->lun
= cpu_to_be64((u64
) lun
<< 48);
1469 tsk_mgmt
->tag
= req_tag
| SRP_TAG_TSK_MGMT
;
1470 tsk_mgmt
->tsk_mgmt_func
= func
;
1471 tsk_mgmt
->task_tag
= req_tag
;
1473 ib_dma_sync_single_for_device(dev
, iu
->dma
, sizeof *tsk_mgmt
,
1475 if (srp_post_send(target
, iu
, sizeof *tsk_mgmt
)) {
1476 srp_put_tx_iu(target
, iu
, SRP_IU_TSK_MGMT
);
1480 if (!wait_for_completion_timeout(&target
->tsk_mgmt_done
,
1481 msecs_to_jiffies(SRP_ABORT_TIMEOUT_MS
)))
1487 static int srp_abort(struct scsi_cmnd
*scmnd
)
1489 struct srp_target_port
*target
= host_to_target(scmnd
->device
->host
);
1490 struct srp_request
*req
= (struct srp_request
*) scmnd
->host_scribble
;
1493 shost_printk(KERN_ERR
, target
->scsi_host
, "SRP abort called\n");
1495 if (!req
|| target
->qp_in_error
)
1497 if (srp_send_tsk_mgmt(target
, req
->index
, scmnd
->device
->lun
,
1498 SRP_TSK_ABORT_TASK
))
1501 spin_lock_irq(target
->scsi_host
->host_lock
);
1504 if (!target
->tsk_mgmt_status
) {
1505 srp_remove_req(target
, req
);
1506 scmnd
->result
= DID_ABORT
<< 16;
1511 spin_unlock_irq(target
->scsi_host
->host_lock
);
1516 static int srp_reset_device(struct scsi_cmnd
*scmnd
)
1518 struct srp_target_port
*target
= host_to_target(scmnd
->device
->host
);
1521 shost_printk(KERN_ERR
, target
->scsi_host
, "SRP reset_device called\n");
1523 if (target
->qp_in_error
)
1525 if (srp_send_tsk_mgmt(target
, SRP_TAG_NO_REQ
, scmnd
->device
->lun
,
1528 if (target
->tsk_mgmt_status
)
1531 spin_lock_irq(target
->scsi_host
->host_lock
);
1533 for (i
= 0; i
< SRP_CMD_SQ_SIZE
; ++i
) {
1534 struct srp_request
*req
= &target
->req_ring
[i
];
1535 if (req
->scmnd
&& req
->scmnd
->device
== scmnd
->device
)
1536 srp_reset_req(target
, req
);
1539 spin_unlock_irq(target
->scsi_host
->host_lock
);
1544 static int srp_reset_host(struct scsi_cmnd
*scmnd
)
1546 struct srp_target_port
*target
= host_to_target(scmnd
->device
->host
);
1549 shost_printk(KERN_ERR
, target
->scsi_host
, PFX
"SRP reset_host called\n");
1551 if (!srp_reconnect_target(target
))
1557 static ssize_t
show_id_ext(struct device
*dev
, struct device_attribute
*attr
,
1560 struct srp_target_port
*target
= host_to_target(class_to_shost(dev
));
1562 if (target
->state
== SRP_TARGET_DEAD
||
1563 target
->state
== SRP_TARGET_REMOVED
)
1566 return sprintf(buf
, "0x%016llx\n",
1567 (unsigned long long) be64_to_cpu(target
->id_ext
));
1570 static ssize_t
show_ioc_guid(struct device
*dev
, struct device_attribute
*attr
,
1573 struct srp_target_port
*target
= host_to_target(class_to_shost(dev
));
1575 if (target
->state
== SRP_TARGET_DEAD
||
1576 target
->state
== SRP_TARGET_REMOVED
)
1579 return sprintf(buf
, "0x%016llx\n",
1580 (unsigned long long) be64_to_cpu(target
->ioc_guid
));
1583 static ssize_t
show_service_id(struct device
*dev
,
1584 struct device_attribute
*attr
, char *buf
)
1586 struct srp_target_port
*target
= host_to_target(class_to_shost(dev
));
1588 if (target
->state
== SRP_TARGET_DEAD
||
1589 target
->state
== SRP_TARGET_REMOVED
)
1592 return sprintf(buf
, "0x%016llx\n",
1593 (unsigned long long) be64_to_cpu(target
->service_id
));
1596 static ssize_t
show_pkey(struct device
*dev
, struct device_attribute
*attr
,
1599 struct srp_target_port
*target
= host_to_target(class_to_shost(dev
));
1601 if (target
->state
== SRP_TARGET_DEAD
||
1602 target
->state
== SRP_TARGET_REMOVED
)
1605 return sprintf(buf
, "0x%04x\n", be16_to_cpu(target
->path
.pkey
));
1608 static ssize_t
show_dgid(struct device
*dev
, struct device_attribute
*attr
,
1611 struct srp_target_port
*target
= host_to_target(class_to_shost(dev
));
1613 if (target
->state
== SRP_TARGET_DEAD
||
1614 target
->state
== SRP_TARGET_REMOVED
)
1617 return sprintf(buf
, "%pI6\n", target
->path
.dgid
.raw
);
1620 static ssize_t
show_orig_dgid(struct device
*dev
,
1621 struct device_attribute
*attr
, char *buf
)
1623 struct srp_target_port
*target
= host_to_target(class_to_shost(dev
));
1625 if (target
->state
== SRP_TARGET_DEAD
||
1626 target
->state
== SRP_TARGET_REMOVED
)
1629 return sprintf(buf
, "%pI6\n", target
->orig_dgid
);
1632 static ssize_t
show_req_lim(struct device
*dev
,
1633 struct device_attribute
*attr
, char *buf
)
1635 struct srp_target_port
*target
= host_to_target(class_to_shost(dev
));
1637 if (target
->state
== SRP_TARGET_DEAD
||
1638 target
->state
== SRP_TARGET_REMOVED
)
1641 return sprintf(buf
, "%d\n", target
->req_lim
);
1644 static ssize_t
show_zero_req_lim(struct device
*dev
,
1645 struct device_attribute
*attr
, char *buf
)
1647 struct srp_target_port
*target
= host_to_target(class_to_shost(dev
));
1649 if (target
->state
== SRP_TARGET_DEAD
||
1650 target
->state
== SRP_TARGET_REMOVED
)
1653 return sprintf(buf
, "%d\n", target
->zero_req_lim
);
1656 static ssize_t
show_local_ib_port(struct device
*dev
,
1657 struct device_attribute
*attr
, char *buf
)
1659 struct srp_target_port
*target
= host_to_target(class_to_shost(dev
));
1661 return sprintf(buf
, "%d\n", target
->srp_host
->port
);
1664 static ssize_t
show_local_ib_device(struct device
*dev
,
1665 struct device_attribute
*attr
, char *buf
)
1667 struct srp_target_port
*target
= host_to_target(class_to_shost(dev
));
1669 return sprintf(buf
, "%s\n", target
->srp_host
->srp_dev
->dev
->name
);
1672 static DEVICE_ATTR(id_ext
, S_IRUGO
, show_id_ext
, NULL
);
1673 static DEVICE_ATTR(ioc_guid
, S_IRUGO
, show_ioc_guid
, NULL
);
1674 static DEVICE_ATTR(service_id
, S_IRUGO
, show_service_id
, NULL
);
1675 static DEVICE_ATTR(pkey
, S_IRUGO
, show_pkey
, NULL
);
1676 static DEVICE_ATTR(dgid
, S_IRUGO
, show_dgid
, NULL
);
1677 static DEVICE_ATTR(orig_dgid
, S_IRUGO
, show_orig_dgid
, NULL
);
1678 static DEVICE_ATTR(req_lim
, S_IRUGO
, show_req_lim
, NULL
);
1679 static DEVICE_ATTR(zero_req_lim
, S_IRUGO
, show_zero_req_lim
, NULL
);
1680 static DEVICE_ATTR(local_ib_port
, S_IRUGO
, show_local_ib_port
, NULL
);
1681 static DEVICE_ATTR(local_ib_device
, S_IRUGO
, show_local_ib_device
, NULL
);
1683 static struct device_attribute
*srp_host_attrs
[] = {
1686 &dev_attr_service_id
,
1689 &dev_attr_orig_dgid
,
1691 &dev_attr_zero_req_lim
,
1692 &dev_attr_local_ib_port
,
1693 &dev_attr_local_ib_device
,
1697 static struct scsi_host_template srp_template
= {
1698 .module
= THIS_MODULE
,
1699 .name
= "InfiniBand SRP initiator",
1700 .proc_name
= DRV_NAME
,
1701 .info
= srp_target_info
,
1702 .queuecommand
= srp_queuecommand
,
1703 .eh_abort_handler
= srp_abort
,
1704 .eh_device_reset_handler
= srp_reset_device
,
1705 .eh_host_reset_handler
= srp_reset_host
,
1706 .can_queue
= SRP_CMD_SQ_SIZE
,
1708 .cmd_per_lun
= SRP_CMD_SQ_SIZE
,
1709 .use_clustering
= ENABLE_CLUSTERING
,
1710 .shost_attrs
= srp_host_attrs
1713 static int srp_add_target(struct srp_host
*host
, struct srp_target_port
*target
)
1715 struct srp_rport_identifiers ids
;
1716 struct srp_rport
*rport
;
1718 sprintf(target
->target_name
, "SRP.T10:%016llX",
1719 (unsigned long long) be64_to_cpu(target
->id_ext
));
1721 if (scsi_add_host(target
->scsi_host
, host
->srp_dev
->dev
->dma_device
))
1724 memcpy(ids
.port_id
, &target
->id_ext
, 8);
1725 memcpy(ids
.port_id
+ 8, &target
->ioc_guid
, 8);
1726 ids
.roles
= SRP_RPORT_ROLE_TARGET
;
1727 rport
= srp_rport_add(target
->scsi_host
, &ids
);
1728 if (IS_ERR(rport
)) {
1729 scsi_remove_host(target
->scsi_host
);
1730 return PTR_ERR(rport
);
1733 spin_lock(&host
->target_lock
);
1734 list_add_tail(&target
->list
, &host
->target_list
);
1735 spin_unlock(&host
->target_lock
);
1737 target
->state
= SRP_TARGET_LIVE
;
1739 scsi_scan_target(&target
->scsi_host
->shost_gendev
,
1740 0, target
->scsi_id
, SCAN_WILD_CARD
, 0);
1745 static void srp_release_dev(struct device
*dev
)
1747 struct srp_host
*host
=
1748 container_of(dev
, struct srp_host
, dev
);
1750 complete(&host
->released
);
1753 static struct class srp_class
= {
1754 .name
= "infiniband_srp",
1755 .dev_release
= srp_release_dev
1759 * Target ports are added by writing
1761 * id_ext=<SRP ID ext>,ioc_guid=<SRP IOC GUID>,dgid=<dest GID>,
1762 * pkey=<P_Key>,service_id=<service ID>
1764 * to the add_target sysfs attribute.
1768 SRP_OPT_ID_EXT
= 1 << 0,
1769 SRP_OPT_IOC_GUID
= 1 << 1,
1770 SRP_OPT_DGID
= 1 << 2,
1771 SRP_OPT_PKEY
= 1 << 3,
1772 SRP_OPT_SERVICE_ID
= 1 << 4,
1773 SRP_OPT_MAX_SECT
= 1 << 5,
1774 SRP_OPT_MAX_CMD_PER_LUN
= 1 << 6,
1775 SRP_OPT_IO_CLASS
= 1 << 7,
1776 SRP_OPT_INITIATOR_EXT
= 1 << 8,
1777 SRP_OPT_ALL
= (SRP_OPT_ID_EXT
|
1781 SRP_OPT_SERVICE_ID
),
1784 static const match_table_t srp_opt_tokens
= {
1785 { SRP_OPT_ID_EXT
, "id_ext=%s" },
1786 { SRP_OPT_IOC_GUID
, "ioc_guid=%s" },
1787 { SRP_OPT_DGID
, "dgid=%s" },
1788 { SRP_OPT_PKEY
, "pkey=%x" },
1789 { SRP_OPT_SERVICE_ID
, "service_id=%s" },
1790 { SRP_OPT_MAX_SECT
, "max_sect=%d" },
1791 { SRP_OPT_MAX_CMD_PER_LUN
, "max_cmd_per_lun=%d" },
1792 { SRP_OPT_IO_CLASS
, "io_class=%x" },
1793 { SRP_OPT_INITIATOR_EXT
, "initiator_ext=%s" },
1794 { SRP_OPT_ERR
, NULL
}
1797 static int srp_parse_options(const char *buf
, struct srp_target_port
*target
)
1799 char *options
, *sep_opt
;
1802 substring_t args
[MAX_OPT_ARGS
];
1808 options
= kstrdup(buf
, GFP_KERNEL
);
1813 while ((p
= strsep(&sep_opt
, ",")) != NULL
) {
1817 token
= match_token(p
, srp_opt_tokens
, args
);
1821 case SRP_OPT_ID_EXT
:
1822 p
= match_strdup(args
);
1827 target
->id_ext
= cpu_to_be64(simple_strtoull(p
, NULL
, 16));
1831 case SRP_OPT_IOC_GUID
:
1832 p
= match_strdup(args
);
1837 target
->ioc_guid
= cpu_to_be64(simple_strtoull(p
, NULL
, 16));
1842 p
= match_strdup(args
);
1847 if (strlen(p
) != 32) {
1848 printk(KERN_WARNING PFX
"bad dest GID parameter '%s'\n", p
);
1853 for (i
= 0; i
< 16; ++i
) {
1854 strlcpy(dgid
, p
+ i
* 2, 3);
1855 target
->path
.dgid
.raw
[i
] = simple_strtoul(dgid
, NULL
, 16);
1858 memcpy(target
->orig_dgid
, target
->path
.dgid
.raw
, 16);
1862 if (match_hex(args
, &token
)) {
1863 printk(KERN_WARNING PFX
"bad P_Key parameter '%s'\n", p
);
1866 target
->path
.pkey
= cpu_to_be16(token
);
1869 case SRP_OPT_SERVICE_ID
:
1870 p
= match_strdup(args
);
1875 target
->service_id
= cpu_to_be64(simple_strtoull(p
, NULL
, 16));
1876 target
->path
.service_id
= target
->service_id
;
1880 case SRP_OPT_MAX_SECT
:
1881 if (match_int(args
, &token
)) {
1882 printk(KERN_WARNING PFX
"bad max sect parameter '%s'\n", p
);
1885 target
->scsi_host
->max_sectors
= token
;
1888 case SRP_OPT_MAX_CMD_PER_LUN
:
1889 if (match_int(args
, &token
)) {
1890 printk(KERN_WARNING PFX
"bad max cmd_per_lun parameter '%s'\n", p
);
1893 target
->scsi_host
->cmd_per_lun
= min(token
, SRP_CMD_SQ_SIZE
);
1896 case SRP_OPT_IO_CLASS
:
1897 if (match_hex(args
, &token
)) {
1898 printk(KERN_WARNING PFX
"bad IO class parameter '%s' \n", p
);
1901 if (token
!= SRP_REV10_IB_IO_CLASS
&&
1902 token
!= SRP_REV16A_IB_IO_CLASS
) {
1903 printk(KERN_WARNING PFX
"unknown IO class parameter value"
1904 " %x specified (use %x or %x).\n",
1905 token
, SRP_REV10_IB_IO_CLASS
, SRP_REV16A_IB_IO_CLASS
);
1908 target
->io_class
= token
;
1911 case SRP_OPT_INITIATOR_EXT
:
1912 p
= match_strdup(args
);
1917 target
->initiator_ext
= cpu_to_be64(simple_strtoull(p
, NULL
, 16));
1922 printk(KERN_WARNING PFX
"unknown parameter or missing value "
1923 "'%s' in target creation request\n", p
);
1928 if ((opt_mask
& SRP_OPT_ALL
) == SRP_OPT_ALL
)
1931 for (i
= 0; i
< ARRAY_SIZE(srp_opt_tokens
); ++i
)
1932 if ((srp_opt_tokens
[i
].token
& SRP_OPT_ALL
) &&
1933 !(srp_opt_tokens
[i
].token
& opt_mask
))
1934 printk(KERN_WARNING PFX
"target creation request is "
1935 "missing parameter '%s'\n",
1936 srp_opt_tokens
[i
].pattern
);
1943 static ssize_t
srp_create_target(struct device
*dev
,
1944 struct device_attribute
*attr
,
1945 const char *buf
, size_t count
)
1947 struct srp_host
*host
=
1948 container_of(dev
, struct srp_host
, dev
);
1949 struct Scsi_Host
*target_host
;
1950 struct srp_target_port
*target
;
1954 target_host
= scsi_host_alloc(&srp_template
,
1955 sizeof (struct srp_target_port
));
1959 target_host
->transportt
= ib_srp_transport_template
;
1960 target_host
->max_lun
= SRP_MAX_LUN
;
1961 target_host
->max_cmd_len
= sizeof ((struct srp_cmd
*) (void *) 0L)->cdb
;
1963 target
= host_to_target(target_host
);
1965 target
->io_class
= SRP_REV16A_IB_IO_CLASS
;
1966 target
->scsi_host
= target_host
;
1967 target
->srp_host
= host
;
1969 INIT_LIST_HEAD(&target
->free_tx
);
1970 INIT_LIST_HEAD(&target
->free_reqs
);
1971 for (i
= 0; i
< SRP_CMD_SQ_SIZE
; ++i
) {
1972 target
->req_ring
[i
].index
= i
;
1973 list_add_tail(&target
->req_ring
[i
].list
, &target
->free_reqs
);
1976 ret
= srp_parse_options(buf
, target
);
1980 ib_query_gid(host
->srp_dev
->dev
, host
->port
, 0, &target
->path
.sgid
);
1982 shost_printk(KERN_DEBUG
, target
->scsi_host
, PFX
1983 "new target: id_ext %016llx ioc_guid %016llx pkey %04x "
1984 "service_id %016llx dgid %pI6\n",
1985 (unsigned long long) be64_to_cpu(target
->id_ext
),
1986 (unsigned long long) be64_to_cpu(target
->ioc_guid
),
1987 be16_to_cpu(target
->path
.pkey
),
1988 (unsigned long long) be64_to_cpu(target
->service_id
),
1989 target
->path
.dgid
.raw
);
1991 ret
= srp_create_target_ib(target
);
1995 ret
= srp_new_cm_id(target
);
1999 target
->qp_in_error
= 0;
2000 ret
= srp_connect_target(target
);
2002 shost_printk(KERN_ERR
, target
->scsi_host
,
2003 PFX
"Connection failed\n");
2007 ret
= srp_add_target(host
, target
);
2009 goto err_disconnect
;
2014 srp_disconnect_target(target
);
2017 ib_destroy_cm_id(target
->cm_id
);
2020 srp_free_target_ib(target
);
2023 scsi_host_put(target_host
);
2028 static DEVICE_ATTR(add_target
, S_IWUSR
, NULL
, srp_create_target
);
2030 static ssize_t
show_ibdev(struct device
*dev
, struct device_attribute
*attr
,
2033 struct srp_host
*host
= container_of(dev
, struct srp_host
, dev
);
2035 return sprintf(buf
, "%s\n", host
->srp_dev
->dev
->name
);
2038 static DEVICE_ATTR(ibdev
, S_IRUGO
, show_ibdev
, NULL
);
2040 static ssize_t
show_port(struct device
*dev
, struct device_attribute
*attr
,
2043 struct srp_host
*host
= container_of(dev
, struct srp_host
, dev
);
2045 return sprintf(buf
, "%d\n", host
->port
);
2048 static DEVICE_ATTR(port
, S_IRUGO
, show_port
, NULL
);
2050 static struct srp_host
*srp_add_port(struct srp_device
*device
, u8 port
)
2052 struct srp_host
*host
;
2054 host
= kzalloc(sizeof *host
, GFP_KERNEL
);
2058 INIT_LIST_HEAD(&host
->target_list
);
2059 spin_lock_init(&host
->target_lock
);
2060 init_completion(&host
->released
);
2061 host
->srp_dev
= device
;
2064 host
->dev
.class = &srp_class
;
2065 host
->dev
.parent
= device
->dev
->dma_device
;
2066 dev_set_name(&host
->dev
, "srp-%s-%d", device
->dev
->name
, port
);
2068 if (device_register(&host
->dev
))
2070 if (device_create_file(&host
->dev
, &dev_attr_add_target
))
2072 if (device_create_file(&host
->dev
, &dev_attr_ibdev
))
2074 if (device_create_file(&host
->dev
, &dev_attr_port
))
2080 device_unregister(&host
->dev
);
2088 static void srp_add_one(struct ib_device
*device
)
2090 struct srp_device
*srp_dev
;
2091 struct ib_device_attr
*dev_attr
;
2092 struct ib_fmr_pool_param fmr_param
;
2093 struct srp_host
*host
;
2096 dev_attr
= kmalloc(sizeof *dev_attr
, GFP_KERNEL
);
2100 if (ib_query_device(device
, dev_attr
)) {
2101 printk(KERN_WARNING PFX
"Query device failed for %s\n",
2106 srp_dev
= kmalloc(sizeof *srp_dev
, GFP_KERNEL
);
2111 * Use the smallest page size supported by the HCA, down to a
2112 * minimum of 512 bytes (which is the smallest sector that a
2113 * SCSI command will ever carry).
2115 srp_dev
->fmr_page_shift
= max(9, ffs(dev_attr
->page_size_cap
) - 1);
2116 srp_dev
->fmr_page_size
= 1 << srp_dev
->fmr_page_shift
;
2117 srp_dev
->fmr_page_mask
= ~((u64
) srp_dev
->fmr_page_size
- 1);
2119 INIT_LIST_HEAD(&srp_dev
->dev_list
);
2121 srp_dev
->dev
= device
;
2122 srp_dev
->pd
= ib_alloc_pd(device
);
2123 if (IS_ERR(srp_dev
->pd
))
2126 srp_dev
->mr
= ib_get_dma_mr(srp_dev
->pd
,
2127 IB_ACCESS_LOCAL_WRITE
|
2128 IB_ACCESS_REMOTE_READ
|
2129 IB_ACCESS_REMOTE_WRITE
);
2130 if (IS_ERR(srp_dev
->mr
))
2133 memset(&fmr_param
, 0, sizeof fmr_param
);
2134 fmr_param
.pool_size
= SRP_FMR_POOL_SIZE
;
2135 fmr_param
.dirty_watermark
= SRP_FMR_DIRTY_SIZE
;
2136 fmr_param
.cache
= 1;
2137 fmr_param
.max_pages_per_fmr
= SRP_FMR_SIZE
;
2138 fmr_param
.page_shift
= srp_dev
->fmr_page_shift
;
2139 fmr_param
.access
= (IB_ACCESS_LOCAL_WRITE
|
2140 IB_ACCESS_REMOTE_WRITE
|
2141 IB_ACCESS_REMOTE_READ
);
2143 srp_dev
->fmr_pool
= ib_create_fmr_pool(srp_dev
->pd
, &fmr_param
);
2144 if (IS_ERR(srp_dev
->fmr_pool
))
2145 srp_dev
->fmr_pool
= NULL
;
2147 if (device
->node_type
== RDMA_NODE_IB_SWITCH
) {
2152 e
= device
->phys_port_cnt
;
2155 for (p
= s
; p
<= e
; ++p
) {
2156 host
= srp_add_port(srp_dev
, p
);
2158 list_add_tail(&host
->list
, &srp_dev
->dev_list
);
2161 ib_set_client_data(device
, &srp_client
, srp_dev
);
2166 ib_dealloc_pd(srp_dev
->pd
);
2175 static void srp_remove_one(struct ib_device
*device
)
2177 struct srp_device
*srp_dev
;
2178 struct srp_host
*host
, *tmp_host
;
2179 LIST_HEAD(target_list
);
2180 struct srp_target_port
*target
, *tmp_target
;
2182 srp_dev
= ib_get_client_data(device
, &srp_client
);
2184 list_for_each_entry_safe(host
, tmp_host
, &srp_dev
->dev_list
, list
) {
2185 device_unregister(&host
->dev
);
2187 * Wait for the sysfs entry to go away, so that no new
2188 * target ports can be created.
2190 wait_for_completion(&host
->released
);
2193 * Mark all target ports as removed, so we stop queueing
2194 * commands and don't try to reconnect.
2196 spin_lock(&host
->target_lock
);
2197 list_for_each_entry(target
, &host
->target_list
, list
) {
2198 spin_lock_irq(target
->scsi_host
->host_lock
);
2199 target
->state
= SRP_TARGET_REMOVED
;
2200 spin_unlock_irq(target
->scsi_host
->host_lock
);
2202 spin_unlock(&host
->target_lock
);
2205 * Wait for any reconnection tasks that may have
2206 * started before we marked our target ports as
2207 * removed, and any target port removal tasks.
2209 flush_scheduled_work();
2211 list_for_each_entry_safe(target
, tmp_target
,
2212 &host
->target_list
, list
) {
2213 srp_remove_host(target
->scsi_host
);
2214 scsi_remove_host(target
->scsi_host
);
2215 srp_disconnect_target(target
);
2216 ib_destroy_cm_id(target
->cm_id
);
2217 srp_free_target_ib(target
);
2218 scsi_host_put(target
->scsi_host
);
2224 if (srp_dev
->fmr_pool
)
2225 ib_destroy_fmr_pool(srp_dev
->fmr_pool
);
2226 ib_dereg_mr(srp_dev
->mr
);
2227 ib_dealloc_pd(srp_dev
->pd
);
2232 static struct srp_function_template ib_srp_transport_functions
= {
2235 static int __init
srp_init_module(void)
2239 BUILD_BUG_ON(FIELD_SIZEOF(struct ib_wc
, wr_id
) < sizeof(void *));
2241 if (srp_sg_tablesize
> 255) {
2242 printk(KERN_WARNING PFX
"Clamping srp_sg_tablesize to 255\n");
2243 srp_sg_tablesize
= 255;
2246 ib_srp_transport_template
=
2247 srp_attach_transport(&ib_srp_transport_functions
);
2248 if (!ib_srp_transport_template
)
2251 srp_template
.sg_tablesize
= srp_sg_tablesize
;
2252 srp_max_iu_len
= (sizeof (struct srp_cmd
) +
2253 sizeof (struct srp_indirect_buf
) +
2254 srp_sg_tablesize
* 16);
2256 ret
= class_register(&srp_class
);
2258 printk(KERN_ERR PFX
"couldn't register class infiniband_srp\n");
2259 srp_release_transport(ib_srp_transport_template
);
2263 ib_sa_register_client(&srp_sa_client
);
2265 ret
= ib_register_client(&srp_client
);
2267 printk(KERN_ERR PFX
"couldn't register IB client\n");
2268 srp_release_transport(ib_srp_transport_template
);
2269 ib_sa_unregister_client(&srp_sa_client
);
2270 class_unregister(&srp_class
);
2277 static void __exit
srp_cleanup_module(void)
2279 ib_unregister_client(&srp_client
);
2280 ib_sa_unregister_client(&srp_sa_client
);
2281 class_unregister(&srp_class
);
2282 srp_release_transport(ib_srp_transport_template
);
2285 module_init(srp_init_module
);
2286 module_exit(srp_cleanup_module
);