1 /*******************************************************************************
2 * This file contains iSCSI extentions for RDMA (iSER) Verbs
4 * (c) Copyright 2013 Datera, Inc.
6 * Nicholas A. Bellinger <nab@linux-iscsi.org>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 ****************************************************************************/
19 #include <linux/string.h>
20 #include <linux/module.h>
21 #include <linux/scatterlist.h>
22 #include <linux/socket.h>
24 #include <linux/in6.h>
25 #include <rdma/ib_verbs.h>
26 #include <rdma/rdma_cm.h>
27 #include <target/target_core_base.h>
28 #include <target/target_core_fabric.h>
29 #include <target/iscsi/iscsi_transport.h>
30 #include <linux/semaphore.h>
34 #define ISERT_MAX_CONN 8
35 #define ISER_MAX_RX_CQ_LEN (ISERT_QP_MAX_RECV_DTOS * ISERT_MAX_CONN)
36 #define ISER_MAX_TX_CQ_LEN \
37 ((ISERT_QP_MAX_REQ_DTOS + ISCSI_DEF_XMIT_CMDS_MAX) * ISERT_MAX_CONN)
38 #define ISER_MAX_CQ_LEN (ISER_MAX_RX_CQ_LEN + ISER_MAX_TX_CQ_LEN + \
41 static int isert_debug_level
;
42 module_param_named(debug_level
, isert_debug_level
, int, 0644);
43 MODULE_PARM_DESC(debug_level
, "Enable debug tracing if > 0 (default:0)");
45 static DEFINE_MUTEX(device_list_mutex
);
46 static LIST_HEAD(device_list
);
47 static struct workqueue_struct
*isert_comp_wq
;
48 static struct workqueue_struct
*isert_release_wq
;
51 isert_put_response(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
);
53 isert_login_post_recv(struct isert_conn
*isert_conn
);
55 isert_rdma_accept(struct isert_conn
*isert_conn
);
56 struct rdma_cm_id
*isert_setup_id(struct isert_np
*isert_np
);
58 static void isert_release_work(struct work_struct
*work
);
59 static void isert_recv_done(struct ib_cq
*cq
, struct ib_wc
*wc
);
60 static void isert_send_done(struct ib_cq
*cq
, struct ib_wc
*wc
);
61 static void isert_login_recv_done(struct ib_cq
*cq
, struct ib_wc
*wc
);
62 static void isert_login_send_done(struct ib_cq
*cq
, struct ib_wc
*wc
);
65 isert_prot_cmd(struct isert_conn
*conn
, struct se_cmd
*cmd
)
67 return (conn
->pi_support
&&
68 cmd
->prot_op
!= TARGET_PROT_NORMAL
);
73 isert_qp_event_callback(struct ib_event
*e
, void *context
)
75 struct isert_conn
*isert_conn
= context
;
77 isert_err("%s (%d): conn %p\n",
78 ib_event_msg(e
->event
), e
->event
, isert_conn
);
81 case IB_EVENT_COMM_EST
:
82 rdma_notify(isert_conn
->cm_id
, IB_EVENT_COMM_EST
);
84 case IB_EVENT_QP_LAST_WQE_REACHED
:
85 isert_warn("Reached TX IB_EVENT_QP_LAST_WQE_REACHED\n");
92 static struct isert_comp
*
93 isert_comp_get(struct isert_conn
*isert_conn
)
95 struct isert_device
*device
= isert_conn
->device
;
96 struct isert_comp
*comp
;
99 mutex_lock(&device_list_mutex
);
100 for (i
= 0; i
< device
->comps_used
; i
++)
101 if (device
->comps
[i
].active_qps
<
102 device
->comps
[min
].active_qps
)
104 comp
= &device
->comps
[min
];
106 mutex_unlock(&device_list_mutex
);
108 isert_info("conn %p, using comp %p min_index: %d\n",
109 isert_conn
, comp
, min
);
115 isert_comp_put(struct isert_comp
*comp
)
117 mutex_lock(&device_list_mutex
);
119 mutex_unlock(&device_list_mutex
);
122 static struct ib_qp
*
123 isert_create_qp(struct isert_conn
*isert_conn
,
124 struct isert_comp
*comp
,
125 struct rdma_cm_id
*cma_id
)
127 struct isert_device
*device
= isert_conn
->device
;
128 struct ib_qp_init_attr attr
;
131 memset(&attr
, 0, sizeof(struct ib_qp_init_attr
));
132 attr
.event_handler
= isert_qp_event_callback
;
133 attr
.qp_context
= isert_conn
;
134 attr
.send_cq
= comp
->cq
;
135 attr
.recv_cq
= comp
->cq
;
136 attr
.cap
.max_send_wr
= ISERT_QP_MAX_REQ_DTOS
+ 1;
137 attr
.cap
.max_recv_wr
= ISERT_QP_MAX_RECV_DTOS
+ 1;
138 attr
.cap
.max_rdma_ctxs
= ISCSI_DEF_XMIT_CMDS_MAX
;
139 attr
.cap
.max_send_sge
= device
->ib_device
->attrs
.max_sge
;
140 attr
.cap
.max_recv_sge
= 1;
141 attr
.sq_sig_type
= IB_SIGNAL_REQ_WR
;
142 attr
.qp_type
= IB_QPT_RC
;
143 if (device
->pi_capable
)
144 attr
.create_flags
|= IB_QP_CREATE_SIGNATURE_EN
;
146 ret
= rdma_create_qp(cma_id
, device
->pd
, &attr
);
148 isert_err("rdma_create_qp failed for cma_id %d\n", ret
);
156 isert_conn_setup_qp(struct isert_conn
*isert_conn
, struct rdma_cm_id
*cma_id
)
158 struct isert_comp
*comp
;
161 comp
= isert_comp_get(isert_conn
);
162 isert_conn
->qp
= isert_create_qp(isert_conn
, comp
, cma_id
);
163 if (IS_ERR(isert_conn
->qp
)) {
164 ret
= PTR_ERR(isert_conn
->qp
);
170 isert_comp_put(comp
);
175 isert_alloc_rx_descriptors(struct isert_conn
*isert_conn
)
177 struct isert_device
*device
= isert_conn
->device
;
178 struct ib_device
*ib_dev
= device
->ib_device
;
179 struct iser_rx_desc
*rx_desc
;
180 struct ib_sge
*rx_sg
;
184 isert_conn
->rx_descs
= kzalloc(ISERT_QP_MAX_RECV_DTOS
*
185 sizeof(struct iser_rx_desc
), GFP_KERNEL
);
186 if (!isert_conn
->rx_descs
)
189 rx_desc
= isert_conn
->rx_descs
;
191 for (i
= 0; i
< ISERT_QP_MAX_RECV_DTOS
; i
++, rx_desc
++) {
192 dma_addr
= ib_dma_map_single(ib_dev
, (void *)rx_desc
,
193 ISER_RX_PAYLOAD_SIZE
, DMA_FROM_DEVICE
);
194 if (ib_dma_mapping_error(ib_dev
, dma_addr
))
197 rx_desc
->dma_addr
= dma_addr
;
199 rx_sg
= &rx_desc
->rx_sg
;
200 rx_sg
->addr
= rx_desc
->dma_addr
;
201 rx_sg
->length
= ISER_RX_PAYLOAD_SIZE
;
202 rx_sg
->lkey
= device
->pd
->local_dma_lkey
;
203 rx_desc
->rx_cqe
.done
= isert_recv_done
;
209 rx_desc
= isert_conn
->rx_descs
;
210 for (j
= 0; j
< i
; j
++, rx_desc
++) {
211 ib_dma_unmap_single(ib_dev
, rx_desc
->dma_addr
,
212 ISER_RX_PAYLOAD_SIZE
, DMA_FROM_DEVICE
);
214 kfree(isert_conn
->rx_descs
);
215 isert_conn
->rx_descs
= NULL
;
217 isert_err("conn %p failed to allocate rx descriptors\n", isert_conn
);
223 isert_free_rx_descriptors(struct isert_conn
*isert_conn
)
225 struct ib_device
*ib_dev
= isert_conn
->device
->ib_device
;
226 struct iser_rx_desc
*rx_desc
;
229 if (!isert_conn
->rx_descs
)
232 rx_desc
= isert_conn
->rx_descs
;
233 for (i
= 0; i
< ISERT_QP_MAX_RECV_DTOS
; i
++, rx_desc
++) {
234 ib_dma_unmap_single(ib_dev
, rx_desc
->dma_addr
,
235 ISER_RX_PAYLOAD_SIZE
, DMA_FROM_DEVICE
);
238 kfree(isert_conn
->rx_descs
);
239 isert_conn
->rx_descs
= NULL
;
243 isert_free_comps(struct isert_device
*device
)
247 for (i
= 0; i
< device
->comps_used
; i
++) {
248 struct isert_comp
*comp
= &device
->comps
[i
];
251 ib_free_cq(comp
->cq
);
253 kfree(device
->comps
);
257 isert_alloc_comps(struct isert_device
*device
)
259 int i
, max_cqe
, ret
= 0;
261 device
->comps_used
= min(ISERT_MAX_CQ
, min_t(int, num_online_cpus(),
262 device
->ib_device
->num_comp_vectors
));
264 isert_info("Using %d CQs, %s supports %d vectors support "
266 device
->comps_used
, device
->ib_device
->name
,
267 device
->ib_device
->num_comp_vectors
,
270 device
->comps
= kcalloc(device
->comps_used
, sizeof(struct isert_comp
),
272 if (!device
->comps
) {
273 isert_err("Unable to allocate completion contexts\n");
277 max_cqe
= min(ISER_MAX_CQ_LEN
, device
->ib_device
->attrs
.max_cqe
);
279 for (i
= 0; i
< device
->comps_used
; i
++) {
280 struct isert_comp
*comp
= &device
->comps
[i
];
282 comp
->device
= device
;
283 comp
->cq
= ib_alloc_cq(device
->ib_device
, comp
, max_cqe
, i
,
285 if (IS_ERR(comp
->cq
)) {
286 isert_err("Unable to allocate cq\n");
287 ret
= PTR_ERR(comp
->cq
);
295 isert_free_comps(device
);
300 isert_create_device_ib_res(struct isert_device
*device
)
302 struct ib_device
*ib_dev
= device
->ib_device
;
305 isert_dbg("devattr->max_sge: %d\n", ib_dev
->attrs
.max_sge
);
306 isert_dbg("devattr->max_sge_rd: %d\n", ib_dev
->attrs
.max_sge_rd
);
308 ret
= isert_alloc_comps(device
);
312 device
->pd
= ib_alloc_pd(ib_dev
);
313 if (IS_ERR(device
->pd
)) {
314 ret
= PTR_ERR(device
->pd
);
315 isert_err("failed to allocate pd, device %p, ret=%d\n",
320 /* Check signature cap */
321 device
->pi_capable
= ib_dev
->attrs
.device_cap_flags
&
322 IB_DEVICE_SIGNATURE_HANDOVER
? true : false;
327 isert_free_comps(device
);
335 isert_free_device_ib_res(struct isert_device
*device
)
337 isert_info("device %p\n", device
);
339 ib_dealloc_pd(device
->pd
);
340 isert_free_comps(device
);
344 isert_device_put(struct isert_device
*device
)
346 mutex_lock(&device_list_mutex
);
348 isert_info("device %p refcount %d\n", device
, device
->refcount
);
349 if (!device
->refcount
) {
350 isert_free_device_ib_res(device
);
351 list_del(&device
->dev_node
);
354 mutex_unlock(&device_list_mutex
);
357 static struct isert_device
*
358 isert_device_get(struct rdma_cm_id
*cma_id
)
360 struct isert_device
*device
;
363 mutex_lock(&device_list_mutex
);
364 list_for_each_entry(device
, &device_list
, dev_node
) {
365 if (device
->ib_device
->node_guid
== cma_id
->device
->node_guid
) {
367 isert_info("Found iser device %p refcount %d\n",
368 device
, device
->refcount
);
369 mutex_unlock(&device_list_mutex
);
374 device
= kzalloc(sizeof(struct isert_device
), GFP_KERNEL
);
376 mutex_unlock(&device_list_mutex
);
377 return ERR_PTR(-ENOMEM
);
380 INIT_LIST_HEAD(&device
->dev_node
);
382 device
->ib_device
= cma_id
->device
;
383 ret
= isert_create_device_ib_res(device
);
386 mutex_unlock(&device_list_mutex
);
391 list_add_tail(&device
->dev_node
, &device_list
);
392 isert_info("Created a new iser device %p refcount %d\n",
393 device
, device
->refcount
);
394 mutex_unlock(&device_list_mutex
);
400 isert_init_conn(struct isert_conn
*isert_conn
)
402 isert_conn
->state
= ISER_CONN_INIT
;
403 INIT_LIST_HEAD(&isert_conn
->node
);
404 init_completion(&isert_conn
->login_comp
);
405 init_completion(&isert_conn
->login_req_comp
);
406 kref_init(&isert_conn
->kref
);
407 mutex_init(&isert_conn
->mutex
);
408 INIT_WORK(&isert_conn
->release_work
, isert_release_work
);
412 isert_free_login_buf(struct isert_conn
*isert_conn
)
414 struct ib_device
*ib_dev
= isert_conn
->device
->ib_device
;
416 ib_dma_unmap_single(ib_dev
, isert_conn
->login_rsp_dma
,
417 ISER_RX_PAYLOAD_SIZE
, DMA_TO_DEVICE
);
418 kfree(isert_conn
->login_rsp_buf
);
420 ib_dma_unmap_single(ib_dev
, isert_conn
->login_req_dma
,
421 ISER_RX_PAYLOAD_SIZE
,
423 kfree(isert_conn
->login_req_buf
);
427 isert_alloc_login_buf(struct isert_conn
*isert_conn
,
428 struct ib_device
*ib_dev
)
432 isert_conn
->login_req_buf
= kzalloc(sizeof(*isert_conn
->login_req_buf
),
434 if (!isert_conn
->login_req_buf
) {
435 isert_err("Unable to allocate isert_conn->login_buf\n");
439 isert_conn
->login_req_dma
= ib_dma_map_single(ib_dev
,
440 isert_conn
->login_req_buf
,
441 ISER_RX_PAYLOAD_SIZE
, DMA_FROM_DEVICE
);
442 ret
= ib_dma_mapping_error(ib_dev
, isert_conn
->login_req_dma
);
444 isert_err("login_req_dma mapping error: %d\n", ret
);
445 isert_conn
->login_req_dma
= 0;
446 goto out_free_login_req_buf
;
449 isert_conn
->login_rsp_buf
= kzalloc(ISER_RX_PAYLOAD_SIZE
, GFP_KERNEL
);
450 if (!isert_conn
->login_rsp_buf
) {
451 isert_err("Unable to allocate isert_conn->login_rspbuf\n");
452 goto out_unmap_login_req_buf
;
455 isert_conn
->login_rsp_dma
= ib_dma_map_single(ib_dev
,
456 isert_conn
->login_rsp_buf
,
457 ISER_RX_PAYLOAD_SIZE
, DMA_TO_DEVICE
);
458 ret
= ib_dma_mapping_error(ib_dev
, isert_conn
->login_rsp_dma
);
460 isert_err("login_rsp_dma mapping error: %d\n", ret
);
461 isert_conn
->login_rsp_dma
= 0;
462 goto out_free_login_rsp_buf
;
467 out_free_login_rsp_buf
:
468 kfree(isert_conn
->login_rsp_buf
);
469 out_unmap_login_req_buf
:
470 ib_dma_unmap_single(ib_dev
, isert_conn
->login_req_dma
,
471 ISER_RX_PAYLOAD_SIZE
, DMA_FROM_DEVICE
);
472 out_free_login_req_buf
:
473 kfree(isert_conn
->login_req_buf
);
478 isert_set_nego_params(struct isert_conn
*isert_conn
,
479 struct rdma_conn_param
*param
)
481 struct ib_device_attr
*attr
= &isert_conn
->device
->ib_device
->attrs
;
483 /* Set max inflight RDMA READ requests */
484 isert_conn
->initiator_depth
= min_t(u8
, param
->initiator_depth
,
485 attr
->max_qp_init_rd_atom
);
486 isert_dbg("Using initiator_depth: %u\n", isert_conn
->initiator_depth
);
488 if (param
->private_data
) {
489 u8 flags
= *(u8
*)param
->private_data
;
492 * use remote invalidation if the both initiator
493 * and the HCA support it
495 isert_conn
->snd_w_inv
= !(flags
& ISER_SEND_W_INV_NOT_SUP
) &&
496 (attr
->device_cap_flags
&
497 IB_DEVICE_MEM_MGT_EXTENSIONS
);
498 if (isert_conn
->snd_w_inv
)
499 isert_info("Using remote invalidation\n");
504 isert_connect_request(struct rdma_cm_id
*cma_id
, struct rdma_cm_event
*event
)
506 struct isert_np
*isert_np
= cma_id
->context
;
507 struct iscsi_np
*np
= isert_np
->np
;
508 struct isert_conn
*isert_conn
;
509 struct isert_device
*device
;
512 spin_lock_bh(&np
->np_thread_lock
);
514 spin_unlock_bh(&np
->np_thread_lock
);
515 isert_dbg("iscsi_np is not enabled, reject connect request\n");
516 return rdma_reject(cma_id
, NULL
, 0);
518 spin_unlock_bh(&np
->np_thread_lock
);
520 isert_dbg("cma_id: %p, portal: %p\n",
521 cma_id
, cma_id
->context
);
523 isert_conn
= kzalloc(sizeof(struct isert_conn
), GFP_KERNEL
);
527 isert_init_conn(isert_conn
);
528 isert_conn
->cm_id
= cma_id
;
530 ret
= isert_alloc_login_buf(isert_conn
, cma_id
->device
);
534 device
= isert_device_get(cma_id
);
535 if (IS_ERR(device
)) {
536 ret
= PTR_ERR(device
);
537 goto out_rsp_dma_map
;
539 isert_conn
->device
= device
;
541 isert_set_nego_params(isert_conn
, &event
->param
.conn
);
543 ret
= isert_conn_setup_qp(isert_conn
, cma_id
);
547 ret
= isert_login_post_recv(isert_conn
);
551 ret
= isert_rdma_accept(isert_conn
);
555 mutex_lock(&isert_np
->mutex
);
556 list_add_tail(&isert_conn
->node
, &isert_np
->accepted
);
557 mutex_unlock(&isert_np
->mutex
);
562 isert_device_put(device
);
564 isert_free_login_buf(isert_conn
);
567 rdma_reject(cma_id
, NULL
, 0);
572 isert_connect_release(struct isert_conn
*isert_conn
)
574 struct isert_device
*device
= isert_conn
->device
;
576 isert_dbg("conn %p\n", isert_conn
);
580 isert_free_rx_descriptors(isert_conn
);
581 if (isert_conn
->cm_id
)
582 rdma_destroy_id(isert_conn
->cm_id
);
584 if (isert_conn
->qp
) {
585 struct isert_comp
*comp
= isert_conn
->qp
->recv_cq
->cq_context
;
587 isert_comp_put(comp
);
588 ib_destroy_qp(isert_conn
->qp
);
591 if (isert_conn
->login_req_buf
)
592 isert_free_login_buf(isert_conn
);
594 isert_device_put(device
);
600 isert_connected_handler(struct rdma_cm_id
*cma_id
)
602 struct isert_conn
*isert_conn
= cma_id
->qp
->qp_context
;
603 struct isert_np
*isert_np
= cma_id
->context
;
605 isert_info("conn %p\n", isert_conn
);
607 mutex_lock(&isert_conn
->mutex
);
608 isert_conn
->state
= ISER_CONN_UP
;
609 kref_get(&isert_conn
->kref
);
610 mutex_unlock(&isert_conn
->mutex
);
612 mutex_lock(&isert_np
->mutex
);
613 list_move_tail(&isert_conn
->node
, &isert_np
->pending
);
614 mutex_unlock(&isert_np
->mutex
);
616 isert_info("np %p: Allow accept_np to continue\n", isert_np
);
621 isert_release_kref(struct kref
*kref
)
623 struct isert_conn
*isert_conn
= container_of(kref
,
624 struct isert_conn
, kref
);
626 isert_info("conn %p final kref %s/%d\n", isert_conn
, current
->comm
,
629 isert_connect_release(isert_conn
);
633 isert_put_conn(struct isert_conn
*isert_conn
)
635 kref_put(&isert_conn
->kref
, isert_release_kref
);
639 isert_handle_unbound_conn(struct isert_conn
*isert_conn
)
641 struct isert_np
*isert_np
= isert_conn
->cm_id
->context
;
643 mutex_lock(&isert_np
->mutex
);
644 if (!list_empty(&isert_conn
->node
)) {
646 * This means iscsi doesn't know this connection
647 * so schedule a cleanup ourselves
649 list_del_init(&isert_conn
->node
);
650 isert_put_conn(isert_conn
);
651 queue_work(isert_release_wq
, &isert_conn
->release_work
);
653 mutex_unlock(&isert_np
->mutex
);
657 * isert_conn_terminate() - Initiate connection termination
658 * @isert_conn: isert connection struct
661 * In case the connection state is BOUND, move state
662 * to TEMINATING and start teardown sequence (rdma_disconnect).
663 * In case the connection state is UP, complete flush as well.
665 * This routine must be called with mutex held. Thus it is
666 * safe to call multiple times.
669 isert_conn_terminate(struct isert_conn
*isert_conn
)
673 if (isert_conn
->state
>= ISER_CONN_TERMINATING
)
676 isert_info("Terminating conn %p state %d\n",
677 isert_conn
, isert_conn
->state
);
678 isert_conn
->state
= ISER_CONN_TERMINATING
;
679 err
= rdma_disconnect(isert_conn
->cm_id
);
681 isert_warn("Failed rdma_disconnect isert_conn %p\n",
686 isert_np_cma_handler(struct isert_np
*isert_np
,
687 enum rdma_cm_event_type event
)
689 isert_dbg("%s (%d): isert np %p\n",
690 rdma_event_msg(event
), event
, isert_np
);
693 case RDMA_CM_EVENT_DEVICE_REMOVAL
:
694 isert_np
->cm_id
= NULL
;
696 case RDMA_CM_EVENT_ADDR_CHANGE
:
697 isert_np
->cm_id
= isert_setup_id(isert_np
);
698 if (IS_ERR(isert_np
->cm_id
)) {
699 isert_err("isert np %p setup id failed: %ld\n",
700 isert_np
, PTR_ERR(isert_np
->cm_id
));
701 isert_np
->cm_id
= NULL
;
705 isert_err("isert np %p Unexpected event %d\n",
713 isert_disconnected_handler(struct rdma_cm_id
*cma_id
,
714 enum rdma_cm_event_type event
)
716 struct isert_conn
*isert_conn
= cma_id
->qp
->qp_context
;
718 mutex_lock(&isert_conn
->mutex
);
719 switch (isert_conn
->state
) {
720 case ISER_CONN_TERMINATING
:
723 isert_conn_terminate(isert_conn
);
724 ib_drain_qp(isert_conn
->qp
);
725 isert_handle_unbound_conn(isert_conn
);
727 case ISER_CONN_BOUND
:
728 case ISER_CONN_FULL_FEATURE
: /* FALLTHRU */
729 iscsit_cause_connection_reinstatement(isert_conn
->conn
, 0);
732 isert_warn("conn %p teminating in state %d\n",
733 isert_conn
, isert_conn
->state
);
735 mutex_unlock(&isert_conn
->mutex
);
741 isert_connect_error(struct rdma_cm_id
*cma_id
)
743 struct isert_conn
*isert_conn
= cma_id
->qp
->qp_context
;
745 list_del_init(&isert_conn
->node
);
746 isert_conn
->cm_id
= NULL
;
747 isert_put_conn(isert_conn
);
753 isert_cma_handler(struct rdma_cm_id
*cma_id
, struct rdma_cm_event
*event
)
755 struct isert_np
*isert_np
= cma_id
->context
;
758 isert_info("%s (%d): status %d id %p np %p\n",
759 rdma_event_msg(event
->event
), event
->event
,
760 event
->status
, cma_id
, cma_id
->context
);
762 if (isert_np
->cm_id
== cma_id
)
763 return isert_np_cma_handler(cma_id
->context
, event
->event
);
765 switch (event
->event
) {
766 case RDMA_CM_EVENT_CONNECT_REQUEST
:
767 ret
= isert_connect_request(cma_id
, event
);
769 isert_err("failed handle connect request %d\n", ret
);
771 case RDMA_CM_EVENT_ESTABLISHED
:
772 isert_connected_handler(cma_id
);
774 case RDMA_CM_EVENT_ADDR_CHANGE
: /* FALLTHRU */
775 case RDMA_CM_EVENT_DISCONNECTED
: /* FALLTHRU */
776 case RDMA_CM_EVENT_DEVICE_REMOVAL
: /* FALLTHRU */
777 case RDMA_CM_EVENT_TIMEWAIT_EXIT
: /* FALLTHRU */
778 ret
= isert_disconnected_handler(cma_id
, event
->event
);
780 case RDMA_CM_EVENT_REJECTED
: /* FALLTHRU */
781 case RDMA_CM_EVENT_UNREACHABLE
: /* FALLTHRU */
782 case RDMA_CM_EVENT_CONNECT_ERROR
:
783 ret
= isert_connect_error(cma_id
);
786 isert_err("Unhandled RDMA CMA event: %d\n", event
->event
);
794 isert_post_recvm(struct isert_conn
*isert_conn
, u32 count
)
796 struct ib_recv_wr
*rx_wr
, *rx_wr_failed
;
798 struct iser_rx_desc
*rx_desc
;
800 for (rx_wr
= isert_conn
->rx_wr
, i
= 0; i
< count
; i
++, rx_wr
++) {
801 rx_desc
= &isert_conn
->rx_descs
[i
];
803 rx_wr
->wr_cqe
= &rx_desc
->rx_cqe
;
804 rx_wr
->sg_list
= &rx_desc
->rx_sg
;
806 rx_wr
->next
= rx_wr
+ 1;
809 rx_wr
->next
= NULL
; /* mark end of work requests list */
811 ret
= ib_post_recv(isert_conn
->qp
, isert_conn
->rx_wr
,
814 isert_err("ib_post_recv() failed with ret: %d\n", ret
);
820 isert_post_recv(struct isert_conn
*isert_conn
, struct iser_rx_desc
*rx_desc
)
822 struct ib_recv_wr
*rx_wr_failed
, rx_wr
;
825 rx_wr
.wr_cqe
= &rx_desc
->rx_cqe
;
826 rx_wr
.sg_list
= &rx_desc
->rx_sg
;
830 ret
= ib_post_recv(isert_conn
->qp
, &rx_wr
, &rx_wr_failed
);
832 isert_err("ib_post_recv() failed with ret: %d\n", ret
);
838 isert_login_post_send(struct isert_conn
*isert_conn
, struct iser_tx_desc
*tx_desc
)
840 struct ib_device
*ib_dev
= isert_conn
->cm_id
->device
;
841 struct ib_send_wr send_wr
, *send_wr_failed
;
844 ib_dma_sync_single_for_device(ib_dev
, tx_desc
->dma_addr
,
845 ISER_HEADERS_LEN
, DMA_TO_DEVICE
);
847 tx_desc
->tx_cqe
.done
= isert_login_send_done
;
850 send_wr
.wr_cqe
= &tx_desc
->tx_cqe
;
851 send_wr
.sg_list
= tx_desc
->tx_sg
;
852 send_wr
.num_sge
= tx_desc
->num_sge
;
853 send_wr
.opcode
= IB_WR_SEND
;
854 send_wr
.send_flags
= IB_SEND_SIGNALED
;
856 ret
= ib_post_send(isert_conn
->qp
, &send_wr
, &send_wr_failed
);
858 isert_err("ib_post_send() failed, ret: %d\n", ret
);
864 isert_create_send_desc(struct isert_conn
*isert_conn
,
865 struct isert_cmd
*isert_cmd
,
866 struct iser_tx_desc
*tx_desc
)
868 struct isert_device
*device
= isert_conn
->device
;
869 struct ib_device
*ib_dev
= device
->ib_device
;
871 ib_dma_sync_single_for_cpu(ib_dev
, tx_desc
->dma_addr
,
872 ISER_HEADERS_LEN
, DMA_TO_DEVICE
);
874 memset(&tx_desc
->iser_header
, 0, sizeof(struct iser_ctrl
));
875 tx_desc
->iser_header
.flags
= ISCSI_CTRL
;
877 tx_desc
->num_sge
= 1;
879 if (tx_desc
->tx_sg
[0].lkey
!= device
->pd
->local_dma_lkey
) {
880 tx_desc
->tx_sg
[0].lkey
= device
->pd
->local_dma_lkey
;
881 isert_dbg("tx_desc %p lkey mismatch, fixing\n", tx_desc
);
886 isert_init_tx_hdrs(struct isert_conn
*isert_conn
,
887 struct iser_tx_desc
*tx_desc
)
889 struct isert_device
*device
= isert_conn
->device
;
890 struct ib_device
*ib_dev
= device
->ib_device
;
893 dma_addr
= ib_dma_map_single(ib_dev
, (void *)tx_desc
,
894 ISER_HEADERS_LEN
, DMA_TO_DEVICE
);
895 if (ib_dma_mapping_error(ib_dev
, dma_addr
)) {
896 isert_err("ib_dma_mapping_error() failed\n");
900 tx_desc
->dma_addr
= dma_addr
;
901 tx_desc
->tx_sg
[0].addr
= tx_desc
->dma_addr
;
902 tx_desc
->tx_sg
[0].length
= ISER_HEADERS_LEN
;
903 tx_desc
->tx_sg
[0].lkey
= device
->pd
->local_dma_lkey
;
905 isert_dbg("Setup tx_sg[0].addr: 0x%llx length: %u lkey: 0x%x\n",
906 tx_desc
->tx_sg
[0].addr
, tx_desc
->tx_sg
[0].length
,
907 tx_desc
->tx_sg
[0].lkey
);
913 isert_init_send_wr(struct isert_conn
*isert_conn
, struct isert_cmd
*isert_cmd
,
914 struct ib_send_wr
*send_wr
)
916 struct iser_tx_desc
*tx_desc
= &isert_cmd
->tx_desc
;
918 tx_desc
->tx_cqe
.done
= isert_send_done
;
919 send_wr
->wr_cqe
= &tx_desc
->tx_cqe
;
921 if (isert_conn
->snd_w_inv
&& isert_cmd
->inv_rkey
) {
922 send_wr
->opcode
= IB_WR_SEND_WITH_INV
;
923 send_wr
->ex
.invalidate_rkey
= isert_cmd
->inv_rkey
;
925 send_wr
->opcode
= IB_WR_SEND
;
928 send_wr
->sg_list
= &tx_desc
->tx_sg
[0];
929 send_wr
->num_sge
= isert_cmd
->tx_desc
.num_sge
;
930 send_wr
->send_flags
= IB_SEND_SIGNALED
;
934 isert_login_post_recv(struct isert_conn
*isert_conn
)
936 struct ib_recv_wr rx_wr
, *rx_wr_fail
;
940 memset(&sge
, 0, sizeof(struct ib_sge
));
941 sge
.addr
= isert_conn
->login_req_dma
;
942 sge
.length
= ISER_RX_PAYLOAD_SIZE
;
943 sge
.lkey
= isert_conn
->device
->pd
->local_dma_lkey
;
945 isert_dbg("Setup sge: addr: %llx length: %d 0x%08x\n",
946 sge
.addr
, sge
.length
, sge
.lkey
);
948 isert_conn
->login_req_buf
->rx_cqe
.done
= isert_login_recv_done
;
950 memset(&rx_wr
, 0, sizeof(struct ib_recv_wr
));
951 rx_wr
.wr_cqe
= &isert_conn
->login_req_buf
->rx_cqe
;
952 rx_wr
.sg_list
= &sge
;
955 ret
= ib_post_recv(isert_conn
->qp
, &rx_wr
, &rx_wr_fail
);
957 isert_err("ib_post_recv() failed: %d\n", ret
);
963 isert_put_login_tx(struct iscsi_conn
*conn
, struct iscsi_login
*login
,
966 struct isert_conn
*isert_conn
= conn
->context
;
967 struct isert_device
*device
= isert_conn
->device
;
968 struct ib_device
*ib_dev
= device
->ib_device
;
969 struct iser_tx_desc
*tx_desc
= &isert_conn
->login_tx_desc
;
972 isert_create_send_desc(isert_conn
, NULL
, tx_desc
);
974 memcpy(&tx_desc
->iscsi_header
, &login
->rsp
[0],
975 sizeof(struct iscsi_hdr
));
977 isert_init_tx_hdrs(isert_conn
, tx_desc
);
980 struct ib_sge
*tx_dsg
= &tx_desc
->tx_sg
[1];
982 ib_dma_sync_single_for_cpu(ib_dev
, isert_conn
->login_rsp_dma
,
983 length
, DMA_TO_DEVICE
);
985 memcpy(isert_conn
->login_rsp_buf
, login
->rsp_buf
, length
);
987 ib_dma_sync_single_for_device(ib_dev
, isert_conn
->login_rsp_dma
,
988 length
, DMA_TO_DEVICE
);
990 tx_dsg
->addr
= isert_conn
->login_rsp_dma
;
991 tx_dsg
->length
= length
;
992 tx_dsg
->lkey
= isert_conn
->device
->pd
->local_dma_lkey
;
993 tx_desc
->num_sge
= 2;
995 if (!login
->login_failed
) {
996 if (login
->login_complete
) {
997 ret
= isert_alloc_rx_descriptors(isert_conn
);
1001 ret
= isert_post_recvm(isert_conn
,
1002 ISERT_QP_MAX_RECV_DTOS
);
1006 /* Now we are in FULL_FEATURE phase */
1007 mutex_lock(&isert_conn
->mutex
);
1008 isert_conn
->state
= ISER_CONN_FULL_FEATURE
;
1009 mutex_unlock(&isert_conn
->mutex
);
1013 ret
= isert_login_post_recv(isert_conn
);
1018 ret
= isert_login_post_send(isert_conn
, tx_desc
);
1026 isert_rx_login_req(struct isert_conn
*isert_conn
)
1028 struct iser_rx_desc
*rx_desc
= isert_conn
->login_req_buf
;
1029 int rx_buflen
= isert_conn
->login_req_len
;
1030 struct iscsi_conn
*conn
= isert_conn
->conn
;
1031 struct iscsi_login
*login
= conn
->conn_login
;
1034 isert_info("conn %p\n", isert_conn
);
1036 WARN_ON_ONCE(!login
);
1038 if (login
->first_request
) {
1039 struct iscsi_login_req
*login_req
=
1040 (struct iscsi_login_req
*)&rx_desc
->iscsi_header
;
1042 * Setup the initial iscsi_login values from the leading
1043 * login request PDU.
1045 login
->leading_connection
= (!login_req
->tsih
) ? 1 : 0;
1046 login
->current_stage
=
1047 (login_req
->flags
& ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK
)
1049 login
->version_min
= login_req
->min_version
;
1050 login
->version_max
= login_req
->max_version
;
1051 memcpy(login
->isid
, login_req
->isid
, 6);
1052 login
->cmd_sn
= be32_to_cpu(login_req
->cmdsn
);
1053 login
->init_task_tag
= login_req
->itt
;
1054 login
->initial_exp_statsn
= be32_to_cpu(login_req
->exp_statsn
);
1055 login
->cid
= be16_to_cpu(login_req
->cid
);
1056 login
->tsih
= be16_to_cpu(login_req
->tsih
);
1059 memcpy(&login
->req
[0], (void *)&rx_desc
->iscsi_header
, ISCSI_HDR_LEN
);
1061 size
= min(rx_buflen
, MAX_KEY_VALUE_PAIRS
);
1062 isert_dbg("Using login payload size: %d, rx_buflen: %d "
1063 "MAX_KEY_VALUE_PAIRS: %d\n", size
, rx_buflen
,
1064 MAX_KEY_VALUE_PAIRS
);
1065 memcpy(login
->req_buf
, &rx_desc
->data
[0], size
);
1067 if (login
->first_request
) {
1068 complete(&isert_conn
->login_comp
);
1071 schedule_delayed_work(&conn
->login_work
, 0);
1074 static struct iscsi_cmd
1075 *isert_allocate_cmd(struct iscsi_conn
*conn
, struct iser_rx_desc
*rx_desc
)
1077 struct isert_conn
*isert_conn
= conn
->context
;
1078 struct isert_cmd
*isert_cmd
;
1079 struct iscsi_cmd
*cmd
;
1081 cmd
= iscsit_allocate_cmd(conn
, TASK_INTERRUPTIBLE
);
1083 isert_err("Unable to allocate iscsi_cmd + isert_cmd\n");
1086 isert_cmd
= iscsit_priv_cmd(cmd
);
1087 isert_cmd
->conn
= isert_conn
;
1088 isert_cmd
->iscsi_cmd
= cmd
;
1089 isert_cmd
->rx_desc
= rx_desc
;
1095 isert_handle_scsi_cmd(struct isert_conn
*isert_conn
,
1096 struct isert_cmd
*isert_cmd
, struct iscsi_cmd
*cmd
,
1097 struct iser_rx_desc
*rx_desc
, unsigned char *buf
)
1099 struct iscsi_conn
*conn
= isert_conn
->conn
;
1100 struct iscsi_scsi_req
*hdr
= (struct iscsi_scsi_req
*)buf
;
1101 int imm_data
, imm_data_len
, unsol_data
, sg_nents
, rc
;
1102 bool dump_payload
= false;
1103 unsigned int data_len
;
1105 rc
= iscsit_setup_scsi_cmd(conn
, cmd
, buf
);
1109 imm_data
= cmd
->immediate_data
;
1110 imm_data_len
= cmd
->first_burst_len
;
1111 unsol_data
= cmd
->unsolicited_data
;
1112 data_len
= cmd
->se_cmd
.data_length
;
1114 if (imm_data
&& imm_data_len
== data_len
)
1115 cmd
->se_cmd
.se_cmd_flags
|= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC
;
1116 rc
= iscsit_process_scsi_cmd(conn
, cmd
, hdr
);
1119 } else if (rc
> 0) {
1120 dump_payload
= true;
1127 if (imm_data_len
!= data_len
) {
1128 sg_nents
= max(1UL, DIV_ROUND_UP(imm_data_len
, PAGE_SIZE
));
1129 sg_copy_from_buffer(cmd
->se_cmd
.t_data_sg
, sg_nents
,
1130 &rx_desc
->data
[0], imm_data_len
);
1131 isert_dbg("Copy Immediate sg_nents: %u imm_data_len: %d\n",
1132 sg_nents
, imm_data_len
);
1134 sg_init_table(&isert_cmd
->sg
, 1);
1135 cmd
->se_cmd
.t_data_sg
= &isert_cmd
->sg
;
1136 cmd
->se_cmd
.t_data_nents
= 1;
1137 sg_set_buf(&isert_cmd
->sg
, &rx_desc
->data
[0], imm_data_len
);
1138 isert_dbg("Transfer Immediate imm_data_len: %d\n",
1142 cmd
->write_data_done
+= imm_data_len
;
1144 if (cmd
->write_data_done
== cmd
->se_cmd
.data_length
) {
1145 spin_lock_bh(&cmd
->istate_lock
);
1146 cmd
->cmd_flags
|= ICF_GOT_LAST_DATAOUT
;
1147 cmd
->i_state
= ISTATE_RECEIVED_LAST_DATAOUT
;
1148 spin_unlock_bh(&cmd
->istate_lock
);
1152 rc
= iscsit_sequence_cmd(conn
, cmd
, buf
, hdr
->cmdsn
);
1154 if (!rc
&& dump_payload
== false && unsol_data
)
1155 iscsit_set_unsoliticed_dataout(cmd
);
1156 else if (dump_payload
&& imm_data
)
1157 target_put_sess_cmd(&cmd
->se_cmd
);
1163 isert_handle_iscsi_dataout(struct isert_conn
*isert_conn
,
1164 struct iser_rx_desc
*rx_desc
, unsigned char *buf
)
1166 struct scatterlist
*sg_start
;
1167 struct iscsi_conn
*conn
= isert_conn
->conn
;
1168 struct iscsi_cmd
*cmd
= NULL
;
1169 struct iscsi_data
*hdr
= (struct iscsi_data
*)buf
;
1170 u32 unsol_data_len
= ntoh24(hdr
->dlength
);
1171 int rc
, sg_nents
, sg_off
, page_off
;
1173 rc
= iscsit_check_dataout_hdr(conn
, buf
, &cmd
);
1179 * FIXME: Unexpected unsolicited_data out
1181 if (!cmd
->unsolicited_data
) {
1182 isert_err("Received unexpected solicited data payload\n");
1187 isert_dbg("Unsolicited DataOut unsol_data_len: %u, "
1188 "write_data_done: %u, data_length: %u\n",
1189 unsol_data_len
, cmd
->write_data_done
,
1190 cmd
->se_cmd
.data_length
);
1192 sg_off
= cmd
->write_data_done
/ PAGE_SIZE
;
1193 sg_start
= &cmd
->se_cmd
.t_data_sg
[sg_off
];
1194 sg_nents
= max(1UL, DIV_ROUND_UP(unsol_data_len
, PAGE_SIZE
));
1195 page_off
= cmd
->write_data_done
% PAGE_SIZE
;
1197 * FIXME: Non page-aligned unsolicited_data out
1200 isert_err("unexpected non-page aligned data payload\n");
1204 isert_dbg("Copying DataOut: sg_start: %p, sg_off: %u "
1205 "sg_nents: %u from %p %u\n", sg_start
, sg_off
,
1206 sg_nents
, &rx_desc
->data
[0], unsol_data_len
);
1208 sg_copy_from_buffer(sg_start
, sg_nents
, &rx_desc
->data
[0],
1211 rc
= iscsit_check_dataout_payload(cmd
, hdr
, false);
1216 * multiple data-outs on the same command can arrive -
1217 * so post the buffer before hand
1219 rc
= isert_post_recv(isert_conn
, rx_desc
);
1221 isert_err("ib_post_recv failed with %d\n", rc
);
1228 isert_handle_nop_out(struct isert_conn
*isert_conn
, struct isert_cmd
*isert_cmd
,
1229 struct iscsi_cmd
*cmd
, struct iser_rx_desc
*rx_desc
,
1232 struct iscsi_conn
*conn
= isert_conn
->conn
;
1233 struct iscsi_nopout
*hdr
= (struct iscsi_nopout
*)buf
;
1236 rc
= iscsit_setup_nop_out(conn
, cmd
, hdr
);
1240 * FIXME: Add support for NOPOUT payload using unsolicited RDMA payload
1243 return iscsit_process_nop_out(conn
, cmd
, hdr
);
1247 isert_handle_text_cmd(struct isert_conn
*isert_conn
, struct isert_cmd
*isert_cmd
,
1248 struct iscsi_cmd
*cmd
, struct iser_rx_desc
*rx_desc
,
1249 struct iscsi_text
*hdr
)
1251 struct iscsi_conn
*conn
= isert_conn
->conn
;
1252 u32 payload_length
= ntoh24(hdr
->dlength
);
1254 unsigned char *text_in
= NULL
;
1256 rc
= iscsit_setup_text_cmd(conn
, cmd
, hdr
);
1260 if (payload_length
) {
1261 text_in
= kzalloc(payload_length
, GFP_KERNEL
);
1263 isert_err("Unable to allocate text_in of payload_length: %u\n",
1268 cmd
->text_in_ptr
= text_in
;
1270 memcpy(cmd
->text_in_ptr
, &rx_desc
->data
[0], payload_length
);
1272 return iscsit_process_text_cmd(conn
, cmd
, hdr
);
1276 isert_rx_opcode(struct isert_conn
*isert_conn
, struct iser_rx_desc
*rx_desc
,
1277 uint32_t read_stag
, uint64_t read_va
,
1278 uint32_t write_stag
, uint64_t write_va
)
1280 struct iscsi_hdr
*hdr
= &rx_desc
->iscsi_header
;
1281 struct iscsi_conn
*conn
= isert_conn
->conn
;
1282 struct iscsi_cmd
*cmd
;
1283 struct isert_cmd
*isert_cmd
;
1285 u8 opcode
= (hdr
->opcode
& ISCSI_OPCODE_MASK
);
1287 if (conn
->sess
->sess_ops
->SessionType
&&
1288 (!(opcode
& ISCSI_OP_TEXT
) || !(opcode
& ISCSI_OP_LOGOUT
))) {
1289 isert_err("Got illegal opcode: 0x%02x in SessionType=Discovery,"
1290 " ignoring\n", opcode
);
1295 case ISCSI_OP_SCSI_CMD
:
1296 cmd
= isert_allocate_cmd(conn
, rx_desc
);
1300 isert_cmd
= iscsit_priv_cmd(cmd
);
1301 isert_cmd
->read_stag
= read_stag
;
1302 isert_cmd
->read_va
= read_va
;
1303 isert_cmd
->write_stag
= write_stag
;
1304 isert_cmd
->write_va
= write_va
;
1305 isert_cmd
->inv_rkey
= read_stag
? read_stag
: write_stag
;
1307 ret
= isert_handle_scsi_cmd(isert_conn
, isert_cmd
, cmd
,
1308 rx_desc
, (unsigned char *)hdr
);
1310 case ISCSI_OP_NOOP_OUT
:
1311 cmd
= isert_allocate_cmd(conn
, rx_desc
);
1315 isert_cmd
= iscsit_priv_cmd(cmd
);
1316 ret
= isert_handle_nop_out(isert_conn
, isert_cmd
, cmd
,
1317 rx_desc
, (unsigned char *)hdr
);
1319 case ISCSI_OP_SCSI_DATA_OUT
:
1320 ret
= isert_handle_iscsi_dataout(isert_conn
, rx_desc
,
1321 (unsigned char *)hdr
);
1323 case ISCSI_OP_SCSI_TMFUNC
:
1324 cmd
= isert_allocate_cmd(conn
, rx_desc
);
1328 ret
= iscsit_handle_task_mgt_cmd(conn
, cmd
,
1329 (unsigned char *)hdr
);
1331 case ISCSI_OP_LOGOUT
:
1332 cmd
= isert_allocate_cmd(conn
, rx_desc
);
1336 ret
= iscsit_handle_logout_cmd(conn
, cmd
, (unsigned char *)hdr
);
1339 if (be32_to_cpu(hdr
->ttt
) != 0xFFFFFFFF)
1340 cmd
= iscsit_find_cmd_from_itt(conn
, hdr
->itt
);
1342 cmd
= isert_allocate_cmd(conn
, rx_desc
);
1347 isert_cmd
= iscsit_priv_cmd(cmd
);
1348 ret
= isert_handle_text_cmd(isert_conn
, isert_cmd
, cmd
,
1349 rx_desc
, (struct iscsi_text
*)hdr
);
1352 isert_err("Got unknown iSCSI OpCode: 0x%02x\n", opcode
);
1361 isert_print_wc(struct ib_wc
*wc
, const char *type
)
1363 if (wc
->status
!= IB_WC_WR_FLUSH_ERR
)
1364 isert_err("%s failure: %s (%d) vend_err %x\n", type
,
1365 ib_wc_status_msg(wc
->status
), wc
->status
,
1368 isert_dbg("%s failure: %s (%d)\n", type
,
1369 ib_wc_status_msg(wc
->status
), wc
->status
);
1373 isert_recv_done(struct ib_cq
*cq
, struct ib_wc
*wc
)
1375 struct isert_conn
*isert_conn
= wc
->qp
->qp_context
;
1376 struct ib_device
*ib_dev
= isert_conn
->cm_id
->device
;
1377 struct iser_rx_desc
*rx_desc
= cqe_to_rx_desc(wc
->wr_cqe
);
1378 struct iscsi_hdr
*hdr
= &rx_desc
->iscsi_header
;
1379 struct iser_ctrl
*iser_ctrl
= &rx_desc
->iser_header
;
1380 uint64_t read_va
= 0, write_va
= 0;
1381 uint32_t read_stag
= 0, write_stag
= 0;
1383 if (unlikely(wc
->status
!= IB_WC_SUCCESS
)) {
1384 isert_print_wc(wc
, "recv");
1385 if (wc
->status
!= IB_WC_WR_FLUSH_ERR
)
1386 iscsit_cause_connection_reinstatement(isert_conn
->conn
, 0);
1390 ib_dma_sync_single_for_cpu(ib_dev
, rx_desc
->dma_addr
,
1391 ISER_RX_PAYLOAD_SIZE
, DMA_FROM_DEVICE
);
1393 isert_dbg("DMA: 0x%llx, iSCSI opcode: 0x%02x, ITT: 0x%08x, flags: 0x%02x dlen: %d\n",
1394 rx_desc
->dma_addr
, hdr
->opcode
, hdr
->itt
, hdr
->flags
,
1395 (int)(wc
->byte_len
- ISER_HEADERS_LEN
));
1397 switch (iser_ctrl
->flags
& 0xF0) {
1399 if (iser_ctrl
->flags
& ISER_RSV
) {
1400 read_stag
= be32_to_cpu(iser_ctrl
->read_stag
);
1401 read_va
= be64_to_cpu(iser_ctrl
->read_va
);
1402 isert_dbg("ISER_RSV: read_stag: 0x%x read_va: 0x%llx\n",
1403 read_stag
, (unsigned long long)read_va
);
1405 if (iser_ctrl
->flags
& ISER_WSV
) {
1406 write_stag
= be32_to_cpu(iser_ctrl
->write_stag
);
1407 write_va
= be64_to_cpu(iser_ctrl
->write_va
);
1408 isert_dbg("ISER_WSV: write_stag: 0x%x write_va: 0x%llx\n",
1409 write_stag
, (unsigned long long)write_va
);
1412 isert_dbg("ISER ISCSI_CTRL PDU\n");
1415 isert_err("iSER Hello message\n");
1418 isert_warn("Unknown iSER hdr flags: 0x%02x\n", iser_ctrl
->flags
);
1422 isert_rx_opcode(isert_conn
, rx_desc
,
1423 read_stag
, read_va
, write_stag
, write_va
);
1425 ib_dma_sync_single_for_device(ib_dev
, rx_desc
->dma_addr
,
1426 ISER_RX_PAYLOAD_SIZE
, DMA_FROM_DEVICE
);
1430 isert_login_recv_done(struct ib_cq
*cq
, struct ib_wc
*wc
)
1432 struct isert_conn
*isert_conn
= wc
->qp
->qp_context
;
1433 struct ib_device
*ib_dev
= isert_conn
->cm_id
->device
;
1435 if (unlikely(wc
->status
!= IB_WC_SUCCESS
)) {
1436 isert_print_wc(wc
, "login recv");
1440 ib_dma_sync_single_for_cpu(ib_dev
, isert_conn
->login_req_dma
,
1441 ISER_RX_PAYLOAD_SIZE
, DMA_FROM_DEVICE
);
1443 isert_conn
->login_req_len
= wc
->byte_len
- ISER_HEADERS_LEN
;
1445 if (isert_conn
->conn
) {
1446 struct iscsi_login
*login
= isert_conn
->conn
->conn_login
;
1448 if (login
&& !login
->first_request
)
1449 isert_rx_login_req(isert_conn
);
1452 mutex_lock(&isert_conn
->mutex
);
1453 complete(&isert_conn
->login_req_comp
);
1454 mutex_unlock(&isert_conn
->mutex
);
1456 ib_dma_sync_single_for_device(ib_dev
, isert_conn
->login_req_dma
,
1457 ISER_RX_PAYLOAD_SIZE
, DMA_FROM_DEVICE
);
1461 isert_rdma_rw_ctx_destroy(struct isert_cmd
*cmd
, struct isert_conn
*conn
)
1463 struct se_cmd
*se_cmd
= &cmd
->iscsi_cmd
->se_cmd
;
1464 enum dma_data_direction dir
= target_reverse_dma_direction(se_cmd
);
1466 if (!cmd
->rw
.nr_ops
)
1469 if (isert_prot_cmd(conn
, se_cmd
)) {
1470 rdma_rw_ctx_destroy_signature(&cmd
->rw
, conn
->qp
,
1471 conn
->cm_id
->port_num
, se_cmd
->t_data_sg
,
1472 se_cmd
->t_data_nents
, se_cmd
->t_prot_sg
,
1473 se_cmd
->t_prot_nents
, dir
);
1475 rdma_rw_ctx_destroy(&cmd
->rw
, conn
->qp
, conn
->cm_id
->port_num
,
1476 se_cmd
->t_data_sg
, se_cmd
->t_data_nents
, dir
);
1483 isert_put_cmd(struct isert_cmd
*isert_cmd
, bool comp_err
)
1485 struct iscsi_cmd
*cmd
= isert_cmd
->iscsi_cmd
;
1486 struct isert_conn
*isert_conn
= isert_cmd
->conn
;
1487 struct iscsi_conn
*conn
= isert_conn
->conn
;
1488 struct iscsi_text_rsp
*hdr
;
1490 isert_dbg("Cmd %p\n", isert_cmd
);
1492 switch (cmd
->iscsi_opcode
) {
1493 case ISCSI_OP_SCSI_CMD
:
1494 spin_lock_bh(&conn
->cmd_lock
);
1495 if (!list_empty(&cmd
->i_conn_node
))
1496 list_del_init(&cmd
->i_conn_node
);
1497 spin_unlock_bh(&conn
->cmd_lock
);
1499 if (cmd
->data_direction
== DMA_TO_DEVICE
) {
1500 iscsit_stop_dataout_timer(cmd
);
1502 * Check for special case during comp_err where
1503 * WRITE_PENDING has been handed off from core,
1504 * but requires an extra target_put_sess_cmd()
1505 * before transport_generic_free_cmd() below.
1508 cmd
->se_cmd
.t_state
== TRANSPORT_WRITE_PENDING
) {
1509 struct se_cmd
*se_cmd
= &cmd
->se_cmd
;
1511 target_put_sess_cmd(se_cmd
);
1515 isert_rdma_rw_ctx_destroy(isert_cmd
, isert_conn
);
1516 transport_generic_free_cmd(&cmd
->se_cmd
, 0);
1518 case ISCSI_OP_SCSI_TMFUNC
:
1519 spin_lock_bh(&conn
->cmd_lock
);
1520 if (!list_empty(&cmd
->i_conn_node
))
1521 list_del_init(&cmd
->i_conn_node
);
1522 spin_unlock_bh(&conn
->cmd_lock
);
1524 transport_generic_free_cmd(&cmd
->se_cmd
, 0);
1526 case ISCSI_OP_REJECT
:
1527 case ISCSI_OP_NOOP_OUT
:
1529 hdr
= (struct iscsi_text_rsp
*)&isert_cmd
->tx_desc
.iscsi_header
;
1530 /* If the continue bit is on, keep the command alive */
1531 if (hdr
->flags
& ISCSI_FLAG_TEXT_CONTINUE
)
1534 spin_lock_bh(&conn
->cmd_lock
);
1535 if (!list_empty(&cmd
->i_conn_node
))
1536 list_del_init(&cmd
->i_conn_node
);
1537 spin_unlock_bh(&conn
->cmd_lock
);
1540 * Handle special case for REJECT when iscsi_add_reject*() has
1541 * overwritten the original iscsi_opcode assignment, and the
1542 * associated cmd->se_cmd needs to be released.
1544 if (cmd
->se_cmd
.se_tfo
!= NULL
) {
1545 isert_dbg("Calling transport_generic_free_cmd for 0x%02x\n",
1547 transport_generic_free_cmd(&cmd
->se_cmd
, 0);
1554 iscsit_release_cmd(cmd
);
1560 isert_unmap_tx_desc(struct iser_tx_desc
*tx_desc
, struct ib_device
*ib_dev
)
1562 if (tx_desc
->dma_addr
!= 0) {
1563 isert_dbg("unmap single for tx_desc->dma_addr\n");
1564 ib_dma_unmap_single(ib_dev
, tx_desc
->dma_addr
,
1565 ISER_HEADERS_LEN
, DMA_TO_DEVICE
);
1566 tx_desc
->dma_addr
= 0;
1571 isert_completion_put(struct iser_tx_desc
*tx_desc
, struct isert_cmd
*isert_cmd
,
1572 struct ib_device
*ib_dev
, bool comp_err
)
1574 if (isert_cmd
->pdu_buf_dma
!= 0) {
1575 isert_dbg("unmap single for isert_cmd->pdu_buf_dma\n");
1576 ib_dma_unmap_single(ib_dev
, isert_cmd
->pdu_buf_dma
,
1577 isert_cmd
->pdu_buf_len
, DMA_TO_DEVICE
);
1578 isert_cmd
->pdu_buf_dma
= 0;
1581 isert_unmap_tx_desc(tx_desc
, ib_dev
);
1582 isert_put_cmd(isert_cmd
, comp_err
);
1586 isert_check_pi_status(struct se_cmd
*se_cmd
, struct ib_mr
*sig_mr
)
1588 struct ib_mr_status mr_status
;
1591 ret
= ib_check_mr_status(sig_mr
, IB_MR_CHECK_SIG_STATUS
, &mr_status
);
1593 isert_err("ib_check_mr_status failed, ret %d\n", ret
);
1594 goto fail_mr_status
;
1597 if (mr_status
.fail_status
& IB_MR_CHECK_SIG_STATUS
) {
1599 u32 block_size
= se_cmd
->se_dev
->dev_attrib
.block_size
+ 8;
1601 switch (mr_status
.sig_err
.err_type
) {
1602 case IB_SIG_BAD_GUARD
:
1603 se_cmd
->pi_err
= TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED
;
1605 case IB_SIG_BAD_REFTAG
:
1606 se_cmd
->pi_err
= TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED
;
1608 case IB_SIG_BAD_APPTAG
:
1609 se_cmd
->pi_err
= TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED
;
1612 sec_offset_err
= mr_status
.sig_err
.sig_err_offset
;
1613 do_div(sec_offset_err
, block_size
);
1614 se_cmd
->bad_sector
= sec_offset_err
+ se_cmd
->t_task_lba
;
1616 isert_err("PI error found type %d at sector 0x%llx "
1617 "expected 0x%x vs actual 0x%x\n",
1618 mr_status
.sig_err
.err_type
,
1619 (unsigned long long)se_cmd
->bad_sector
,
1620 mr_status
.sig_err
.expected
,
1621 mr_status
.sig_err
.actual
);
1630 isert_rdma_write_done(struct ib_cq
*cq
, struct ib_wc
*wc
)
1632 struct isert_conn
*isert_conn
= wc
->qp
->qp_context
;
1633 struct isert_device
*device
= isert_conn
->device
;
1634 struct iser_tx_desc
*desc
= cqe_to_tx_desc(wc
->wr_cqe
);
1635 struct isert_cmd
*isert_cmd
= tx_desc_to_cmd(desc
);
1636 struct se_cmd
*cmd
= &isert_cmd
->iscsi_cmd
->se_cmd
;
1639 if (unlikely(wc
->status
!= IB_WC_SUCCESS
)) {
1640 isert_print_wc(wc
, "rdma write");
1641 if (wc
->status
!= IB_WC_WR_FLUSH_ERR
)
1642 iscsit_cause_connection_reinstatement(isert_conn
->conn
, 0);
1643 isert_completion_put(desc
, isert_cmd
, device
->ib_device
, true);
1647 isert_dbg("Cmd %p\n", isert_cmd
);
1649 ret
= isert_check_pi_status(cmd
, isert_cmd
->rw
.sig
->sig_mr
);
1650 isert_rdma_rw_ctx_destroy(isert_cmd
, isert_conn
);
1653 transport_send_check_condition_and_sense(cmd
, cmd
->pi_err
, 0);
1655 isert_put_response(isert_conn
->conn
, isert_cmd
->iscsi_cmd
);
1659 isert_rdma_read_done(struct ib_cq
*cq
, struct ib_wc
*wc
)
1661 struct isert_conn
*isert_conn
= wc
->qp
->qp_context
;
1662 struct isert_device
*device
= isert_conn
->device
;
1663 struct iser_tx_desc
*desc
= cqe_to_tx_desc(wc
->wr_cqe
);
1664 struct isert_cmd
*isert_cmd
= tx_desc_to_cmd(desc
);
1665 struct iscsi_cmd
*cmd
= isert_cmd
->iscsi_cmd
;
1666 struct se_cmd
*se_cmd
= &cmd
->se_cmd
;
1669 if (unlikely(wc
->status
!= IB_WC_SUCCESS
)) {
1670 isert_print_wc(wc
, "rdma read");
1671 if (wc
->status
!= IB_WC_WR_FLUSH_ERR
)
1672 iscsit_cause_connection_reinstatement(isert_conn
->conn
, 0);
1673 isert_completion_put(desc
, isert_cmd
, device
->ib_device
, true);
1677 isert_dbg("Cmd %p\n", isert_cmd
);
1679 iscsit_stop_dataout_timer(cmd
);
1681 if (isert_prot_cmd(isert_conn
, se_cmd
))
1682 ret
= isert_check_pi_status(se_cmd
, isert_cmd
->rw
.sig
->sig_mr
);
1683 isert_rdma_rw_ctx_destroy(isert_cmd
, isert_conn
);
1684 cmd
->write_data_done
= 0;
1686 isert_dbg("Cmd: %p RDMA_READ comp calling execute_cmd\n", isert_cmd
);
1687 spin_lock_bh(&cmd
->istate_lock
);
1688 cmd
->cmd_flags
|= ICF_GOT_LAST_DATAOUT
;
1689 cmd
->i_state
= ISTATE_RECEIVED_LAST_DATAOUT
;
1690 spin_unlock_bh(&cmd
->istate_lock
);
1693 target_put_sess_cmd(se_cmd
);
1694 transport_send_check_condition_and_sense(se_cmd
,
1697 target_execute_cmd(se_cmd
);
1702 isert_do_control_comp(struct work_struct
*work
)
1704 struct isert_cmd
*isert_cmd
= container_of(work
,
1705 struct isert_cmd
, comp_work
);
1706 struct isert_conn
*isert_conn
= isert_cmd
->conn
;
1707 struct ib_device
*ib_dev
= isert_conn
->cm_id
->device
;
1708 struct iscsi_cmd
*cmd
= isert_cmd
->iscsi_cmd
;
1710 isert_dbg("Cmd %p i_state %d\n", isert_cmd
, cmd
->i_state
);
1712 switch (cmd
->i_state
) {
1713 case ISTATE_SEND_TASKMGTRSP
:
1714 iscsit_tmr_post_handler(cmd
, cmd
->conn
);
1715 case ISTATE_SEND_REJECT
: /* FALLTHRU */
1716 case ISTATE_SEND_TEXTRSP
: /* FALLTHRU */
1717 cmd
->i_state
= ISTATE_SENT_STATUS
;
1718 isert_completion_put(&isert_cmd
->tx_desc
, isert_cmd
,
1721 case ISTATE_SEND_LOGOUTRSP
:
1722 iscsit_logout_post_handler(cmd
, cmd
->conn
);
1725 isert_err("Unknown i_state %d\n", cmd
->i_state
);
1732 isert_login_send_done(struct ib_cq
*cq
, struct ib_wc
*wc
)
1734 struct isert_conn
*isert_conn
= wc
->qp
->qp_context
;
1735 struct ib_device
*ib_dev
= isert_conn
->cm_id
->device
;
1736 struct iser_tx_desc
*tx_desc
= cqe_to_tx_desc(wc
->wr_cqe
);
1738 if (unlikely(wc
->status
!= IB_WC_SUCCESS
)) {
1739 isert_print_wc(wc
, "login send");
1740 if (wc
->status
!= IB_WC_WR_FLUSH_ERR
)
1741 iscsit_cause_connection_reinstatement(isert_conn
->conn
, 0);
1744 isert_unmap_tx_desc(tx_desc
, ib_dev
);
1748 isert_send_done(struct ib_cq
*cq
, struct ib_wc
*wc
)
1750 struct isert_conn
*isert_conn
= wc
->qp
->qp_context
;
1751 struct ib_device
*ib_dev
= isert_conn
->cm_id
->device
;
1752 struct iser_tx_desc
*tx_desc
= cqe_to_tx_desc(wc
->wr_cqe
);
1753 struct isert_cmd
*isert_cmd
= tx_desc_to_cmd(tx_desc
);
1755 if (unlikely(wc
->status
!= IB_WC_SUCCESS
)) {
1756 isert_print_wc(wc
, "send");
1757 if (wc
->status
!= IB_WC_WR_FLUSH_ERR
)
1758 iscsit_cause_connection_reinstatement(isert_conn
->conn
, 0);
1759 isert_completion_put(tx_desc
, isert_cmd
, ib_dev
, true);
1763 isert_dbg("Cmd %p\n", isert_cmd
);
1765 switch (isert_cmd
->iscsi_cmd
->i_state
) {
1766 case ISTATE_SEND_TASKMGTRSP
:
1767 case ISTATE_SEND_LOGOUTRSP
:
1768 case ISTATE_SEND_REJECT
:
1769 case ISTATE_SEND_TEXTRSP
:
1770 isert_unmap_tx_desc(tx_desc
, ib_dev
);
1772 INIT_WORK(&isert_cmd
->comp_work
, isert_do_control_comp
);
1773 queue_work(isert_comp_wq
, &isert_cmd
->comp_work
);
1776 isert_cmd
->iscsi_cmd
->i_state
= ISTATE_SENT_STATUS
;
1777 isert_completion_put(tx_desc
, isert_cmd
, ib_dev
, false);
1783 isert_post_response(struct isert_conn
*isert_conn
, struct isert_cmd
*isert_cmd
)
1785 struct ib_send_wr
*wr_failed
;
1788 ret
= isert_post_recv(isert_conn
, isert_cmd
->rx_desc
);
1790 isert_err("ib_post_recv failed with %d\n", ret
);
1794 ret
= ib_post_send(isert_conn
->qp
, &isert_cmd
->tx_desc
.send_wr
,
1797 isert_err("ib_post_send failed with %d\n", ret
);
1804 isert_put_response(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
)
1806 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
1807 struct isert_conn
*isert_conn
= conn
->context
;
1808 struct ib_send_wr
*send_wr
= &isert_cmd
->tx_desc
.send_wr
;
1809 struct iscsi_scsi_rsp
*hdr
= (struct iscsi_scsi_rsp
*)
1810 &isert_cmd
->tx_desc
.iscsi_header
;
1812 isert_create_send_desc(isert_conn
, isert_cmd
, &isert_cmd
->tx_desc
);
1813 iscsit_build_rsp_pdu(cmd
, conn
, true, hdr
);
1814 isert_init_tx_hdrs(isert_conn
, &isert_cmd
->tx_desc
);
1816 * Attach SENSE DATA payload to iSCSI Response PDU
1818 if (cmd
->se_cmd
.sense_buffer
&&
1819 ((cmd
->se_cmd
.se_cmd_flags
& SCF_TRANSPORT_TASK_SENSE
) ||
1820 (cmd
->se_cmd
.se_cmd_flags
& SCF_EMULATED_TASK_SENSE
))) {
1821 struct isert_device
*device
= isert_conn
->device
;
1822 struct ib_device
*ib_dev
= device
->ib_device
;
1823 struct ib_sge
*tx_dsg
= &isert_cmd
->tx_desc
.tx_sg
[1];
1824 u32 padding
, pdu_len
;
1826 put_unaligned_be16(cmd
->se_cmd
.scsi_sense_length
,
1828 cmd
->se_cmd
.scsi_sense_length
+= sizeof(__be16
);
1830 padding
= -(cmd
->se_cmd
.scsi_sense_length
) & 3;
1831 hton24(hdr
->dlength
, (u32
)cmd
->se_cmd
.scsi_sense_length
);
1832 pdu_len
= cmd
->se_cmd
.scsi_sense_length
+ padding
;
1834 isert_cmd
->pdu_buf_dma
= ib_dma_map_single(ib_dev
,
1835 (void *)cmd
->sense_buffer
, pdu_len
,
1838 isert_cmd
->pdu_buf_len
= pdu_len
;
1839 tx_dsg
->addr
= isert_cmd
->pdu_buf_dma
;
1840 tx_dsg
->length
= pdu_len
;
1841 tx_dsg
->lkey
= device
->pd
->local_dma_lkey
;
1842 isert_cmd
->tx_desc
.num_sge
= 2;
1845 isert_init_send_wr(isert_conn
, isert_cmd
, send_wr
);
1847 isert_dbg("Posting SCSI Response\n");
1849 return isert_post_response(isert_conn
, isert_cmd
);
1853 isert_aborted_task(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
)
1855 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
1856 struct isert_conn
*isert_conn
= conn
->context
;
1858 spin_lock_bh(&conn
->cmd_lock
);
1859 if (!list_empty(&cmd
->i_conn_node
))
1860 list_del_init(&cmd
->i_conn_node
);
1861 spin_unlock_bh(&conn
->cmd_lock
);
1863 if (cmd
->data_direction
== DMA_TO_DEVICE
)
1864 iscsit_stop_dataout_timer(cmd
);
1865 isert_rdma_rw_ctx_destroy(isert_cmd
, isert_conn
);
1868 static enum target_prot_op
1869 isert_get_sup_prot_ops(struct iscsi_conn
*conn
)
1871 struct isert_conn
*isert_conn
= conn
->context
;
1872 struct isert_device
*device
= isert_conn
->device
;
1874 if (conn
->tpg
->tpg_attrib
.t10_pi
) {
1875 if (device
->pi_capable
) {
1876 isert_info("conn %p PI offload enabled\n", isert_conn
);
1877 isert_conn
->pi_support
= true;
1878 return TARGET_PROT_ALL
;
1882 isert_info("conn %p PI offload disabled\n", isert_conn
);
1883 isert_conn
->pi_support
= false;
1885 return TARGET_PROT_NORMAL
;
1889 isert_put_nopin(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
,
1890 bool nopout_response
)
1892 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
1893 struct isert_conn
*isert_conn
= conn
->context
;
1894 struct ib_send_wr
*send_wr
= &isert_cmd
->tx_desc
.send_wr
;
1896 isert_create_send_desc(isert_conn
, isert_cmd
, &isert_cmd
->tx_desc
);
1897 iscsit_build_nopin_rsp(cmd
, conn
, (struct iscsi_nopin
*)
1898 &isert_cmd
->tx_desc
.iscsi_header
,
1900 isert_init_tx_hdrs(isert_conn
, &isert_cmd
->tx_desc
);
1901 isert_init_send_wr(isert_conn
, isert_cmd
, send_wr
);
1903 isert_dbg("conn %p Posting NOPIN Response\n", isert_conn
);
1905 return isert_post_response(isert_conn
, isert_cmd
);
1909 isert_put_logout_rsp(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
1911 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
1912 struct isert_conn
*isert_conn
= conn
->context
;
1913 struct ib_send_wr
*send_wr
= &isert_cmd
->tx_desc
.send_wr
;
1915 isert_create_send_desc(isert_conn
, isert_cmd
, &isert_cmd
->tx_desc
);
1916 iscsit_build_logout_rsp(cmd
, conn
, (struct iscsi_logout_rsp
*)
1917 &isert_cmd
->tx_desc
.iscsi_header
);
1918 isert_init_tx_hdrs(isert_conn
, &isert_cmd
->tx_desc
);
1919 isert_init_send_wr(isert_conn
, isert_cmd
, send_wr
);
1921 isert_dbg("conn %p Posting Logout Response\n", isert_conn
);
1923 return isert_post_response(isert_conn
, isert_cmd
);
1927 isert_put_tm_rsp(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
1929 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
1930 struct isert_conn
*isert_conn
= conn
->context
;
1931 struct ib_send_wr
*send_wr
= &isert_cmd
->tx_desc
.send_wr
;
1933 isert_create_send_desc(isert_conn
, isert_cmd
, &isert_cmd
->tx_desc
);
1934 iscsit_build_task_mgt_rsp(cmd
, conn
, (struct iscsi_tm_rsp
*)
1935 &isert_cmd
->tx_desc
.iscsi_header
);
1936 isert_init_tx_hdrs(isert_conn
, &isert_cmd
->tx_desc
);
1937 isert_init_send_wr(isert_conn
, isert_cmd
, send_wr
);
1939 isert_dbg("conn %p Posting Task Management Response\n", isert_conn
);
1941 return isert_post_response(isert_conn
, isert_cmd
);
1945 isert_put_reject(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
1947 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
1948 struct isert_conn
*isert_conn
= conn
->context
;
1949 struct ib_send_wr
*send_wr
= &isert_cmd
->tx_desc
.send_wr
;
1950 struct isert_device
*device
= isert_conn
->device
;
1951 struct ib_device
*ib_dev
= device
->ib_device
;
1952 struct ib_sge
*tx_dsg
= &isert_cmd
->tx_desc
.tx_sg
[1];
1953 struct iscsi_reject
*hdr
=
1954 (struct iscsi_reject
*)&isert_cmd
->tx_desc
.iscsi_header
;
1956 isert_create_send_desc(isert_conn
, isert_cmd
, &isert_cmd
->tx_desc
);
1957 iscsit_build_reject(cmd
, conn
, hdr
);
1958 isert_init_tx_hdrs(isert_conn
, &isert_cmd
->tx_desc
);
1960 hton24(hdr
->dlength
, ISCSI_HDR_LEN
);
1961 isert_cmd
->pdu_buf_dma
= ib_dma_map_single(ib_dev
,
1962 (void *)cmd
->buf_ptr
, ISCSI_HDR_LEN
,
1964 isert_cmd
->pdu_buf_len
= ISCSI_HDR_LEN
;
1965 tx_dsg
->addr
= isert_cmd
->pdu_buf_dma
;
1966 tx_dsg
->length
= ISCSI_HDR_LEN
;
1967 tx_dsg
->lkey
= device
->pd
->local_dma_lkey
;
1968 isert_cmd
->tx_desc
.num_sge
= 2;
1970 isert_init_send_wr(isert_conn
, isert_cmd
, send_wr
);
1972 isert_dbg("conn %p Posting Reject\n", isert_conn
);
1974 return isert_post_response(isert_conn
, isert_cmd
);
1978 isert_put_text_rsp(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
1980 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
1981 struct isert_conn
*isert_conn
= conn
->context
;
1982 struct ib_send_wr
*send_wr
= &isert_cmd
->tx_desc
.send_wr
;
1983 struct iscsi_text_rsp
*hdr
=
1984 (struct iscsi_text_rsp
*)&isert_cmd
->tx_desc
.iscsi_header
;
1988 isert_create_send_desc(isert_conn
, isert_cmd
, &isert_cmd
->tx_desc
);
1989 rc
= iscsit_build_text_rsp(cmd
, conn
, hdr
, ISCSI_INFINIBAND
);
1994 isert_init_tx_hdrs(isert_conn
, &isert_cmd
->tx_desc
);
1997 struct isert_device
*device
= isert_conn
->device
;
1998 struct ib_device
*ib_dev
= device
->ib_device
;
1999 struct ib_sge
*tx_dsg
= &isert_cmd
->tx_desc
.tx_sg
[1];
2000 void *txt_rsp_buf
= cmd
->buf_ptr
;
2002 isert_cmd
->pdu_buf_dma
= ib_dma_map_single(ib_dev
,
2003 txt_rsp_buf
, txt_rsp_len
, DMA_TO_DEVICE
);
2005 isert_cmd
->pdu_buf_len
= txt_rsp_len
;
2006 tx_dsg
->addr
= isert_cmd
->pdu_buf_dma
;
2007 tx_dsg
->length
= txt_rsp_len
;
2008 tx_dsg
->lkey
= device
->pd
->local_dma_lkey
;
2009 isert_cmd
->tx_desc
.num_sge
= 2;
2011 isert_init_send_wr(isert_conn
, isert_cmd
, send_wr
);
2013 isert_dbg("conn %p Text Response\n", isert_conn
);
2015 return isert_post_response(isert_conn
, isert_cmd
);
2019 isert_set_dif_domain(struct se_cmd
*se_cmd
, struct ib_sig_attrs
*sig_attrs
,
2020 struct ib_sig_domain
*domain
)
2022 domain
->sig_type
= IB_SIG_TYPE_T10_DIF
;
2023 domain
->sig
.dif
.bg_type
= IB_T10DIF_CRC
;
2024 domain
->sig
.dif
.pi_interval
= se_cmd
->se_dev
->dev_attrib
.block_size
;
2025 domain
->sig
.dif
.ref_tag
= se_cmd
->reftag_seed
;
2027 * At the moment we hard code those, but if in the future
2028 * the target core would like to use it, we will take it
2031 domain
->sig
.dif
.apptag_check_mask
= 0xffff;
2032 domain
->sig
.dif
.app_escape
= true;
2033 domain
->sig
.dif
.ref_escape
= true;
2034 if (se_cmd
->prot_type
== TARGET_DIF_TYPE1_PROT
||
2035 se_cmd
->prot_type
== TARGET_DIF_TYPE2_PROT
)
2036 domain
->sig
.dif
.ref_remap
= true;
2040 isert_set_sig_attrs(struct se_cmd
*se_cmd
, struct ib_sig_attrs
*sig_attrs
)
2042 memset(sig_attrs
, 0, sizeof(*sig_attrs
));
2044 switch (se_cmd
->prot_op
) {
2045 case TARGET_PROT_DIN_INSERT
:
2046 case TARGET_PROT_DOUT_STRIP
:
2047 sig_attrs
->mem
.sig_type
= IB_SIG_TYPE_NONE
;
2048 isert_set_dif_domain(se_cmd
, sig_attrs
, &sig_attrs
->wire
);
2050 case TARGET_PROT_DOUT_INSERT
:
2051 case TARGET_PROT_DIN_STRIP
:
2052 sig_attrs
->wire
.sig_type
= IB_SIG_TYPE_NONE
;
2053 isert_set_dif_domain(se_cmd
, sig_attrs
, &sig_attrs
->mem
);
2055 case TARGET_PROT_DIN_PASS
:
2056 case TARGET_PROT_DOUT_PASS
:
2057 isert_set_dif_domain(se_cmd
, sig_attrs
, &sig_attrs
->wire
);
2058 isert_set_dif_domain(se_cmd
, sig_attrs
, &sig_attrs
->mem
);
2061 isert_err("Unsupported PI operation %d\n", se_cmd
->prot_op
);
2065 sig_attrs
->check_mask
=
2066 (se_cmd
->prot_checks
& TARGET_DIF_CHECK_GUARD
? 0xc0 : 0) |
2067 (se_cmd
->prot_checks
& TARGET_DIF_CHECK_REFTAG
? 0x30 : 0) |
2068 (se_cmd
->prot_checks
& TARGET_DIF_CHECK_REFTAG
? 0x0f : 0);
2073 isert_rdma_rw_ctx_post(struct isert_cmd
*cmd
, struct isert_conn
*conn
,
2074 struct ib_cqe
*cqe
, struct ib_send_wr
*chain_wr
)
2076 struct se_cmd
*se_cmd
= &cmd
->iscsi_cmd
->se_cmd
;
2077 enum dma_data_direction dir
= target_reverse_dma_direction(se_cmd
);
2078 u8 port_num
= conn
->cm_id
->port_num
;
2083 if (dir
== DMA_FROM_DEVICE
) {
2084 addr
= cmd
->write_va
;
2085 rkey
= cmd
->write_stag
;
2086 offset
= cmd
->iscsi_cmd
->write_data_done
;
2088 addr
= cmd
->read_va
;
2089 rkey
= cmd
->read_stag
;
2093 if (isert_prot_cmd(conn
, se_cmd
)) {
2094 struct ib_sig_attrs sig_attrs
;
2096 ret
= isert_set_sig_attrs(se_cmd
, &sig_attrs
);
2100 WARN_ON_ONCE(offset
);
2101 ret
= rdma_rw_ctx_signature_init(&cmd
->rw
, conn
->qp
, port_num
,
2102 se_cmd
->t_data_sg
, se_cmd
->t_data_nents
,
2103 se_cmd
->t_prot_sg
, se_cmd
->t_prot_nents
,
2104 &sig_attrs
, addr
, rkey
, dir
);
2106 ret
= rdma_rw_ctx_init(&cmd
->rw
, conn
->qp
, port_num
,
2107 se_cmd
->t_data_sg
, se_cmd
->t_data_nents
,
2108 offset
, addr
, rkey
, dir
);
2111 isert_err("Cmd: %p failed to prepare RDMA res\n", cmd
);
2115 ret
= rdma_rw_ctx_post(&cmd
->rw
, conn
->qp
, port_num
, cqe
, chain_wr
);
2117 isert_err("Cmd: %p failed to post RDMA res\n", cmd
);
2122 isert_put_datain(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
)
2124 struct se_cmd
*se_cmd
= &cmd
->se_cmd
;
2125 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
2126 struct isert_conn
*isert_conn
= conn
->context
;
2127 struct ib_cqe
*cqe
= NULL
;
2128 struct ib_send_wr
*chain_wr
= NULL
;
2131 isert_dbg("Cmd: %p RDMA_WRITE data_length: %u\n",
2132 isert_cmd
, se_cmd
->data_length
);
2134 if (isert_prot_cmd(isert_conn
, se_cmd
)) {
2135 isert_cmd
->tx_desc
.tx_cqe
.done
= isert_rdma_write_done
;
2136 cqe
= &isert_cmd
->tx_desc
.tx_cqe
;
2139 * Build isert_conn->tx_desc for iSCSI response PDU and attach
2141 isert_create_send_desc(isert_conn
, isert_cmd
,
2142 &isert_cmd
->tx_desc
);
2143 iscsit_build_rsp_pdu(cmd
, conn
, true, (struct iscsi_scsi_rsp
*)
2144 &isert_cmd
->tx_desc
.iscsi_header
);
2145 isert_init_tx_hdrs(isert_conn
, &isert_cmd
->tx_desc
);
2146 isert_init_send_wr(isert_conn
, isert_cmd
,
2147 &isert_cmd
->tx_desc
.send_wr
);
2149 rc
= isert_post_recv(isert_conn
, isert_cmd
->rx_desc
);
2151 isert_err("ib_post_recv failed with %d\n", rc
);
2155 chain_wr
= &isert_cmd
->tx_desc
.send_wr
;
2158 isert_rdma_rw_ctx_post(isert_cmd
, isert_conn
, cqe
, chain_wr
);
2159 isert_dbg("Cmd: %p posted RDMA_WRITE for iSER Data READ\n", isert_cmd
);
2164 isert_get_dataout(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
, bool recovery
)
2166 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
2168 isert_dbg("Cmd: %p RDMA_READ data_length: %u write_data_done: %u\n",
2169 isert_cmd
, cmd
->se_cmd
.data_length
, cmd
->write_data_done
);
2171 isert_cmd
->tx_desc
.tx_cqe
.done
= isert_rdma_read_done
;
2172 isert_rdma_rw_ctx_post(isert_cmd
, conn
->context
,
2173 &isert_cmd
->tx_desc
.tx_cqe
, NULL
);
2175 isert_dbg("Cmd: %p posted RDMA_READ memory for ISER Data WRITE\n",
2181 isert_immediate_queue(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
, int state
)
2183 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
2188 spin_lock_bh(&conn
->cmd_lock
);
2189 list_del_init(&cmd
->i_conn_node
);
2190 spin_unlock_bh(&conn
->cmd_lock
);
2191 isert_put_cmd(isert_cmd
, true);
2193 case ISTATE_SEND_NOPIN_WANT_RESPONSE
:
2194 ret
= isert_put_nopin(cmd
, conn
, false);
2197 isert_err("Unknown immediate state: 0x%02x\n", state
);
2206 isert_response_queue(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
, int state
)
2208 struct isert_conn
*isert_conn
= conn
->context
;
2212 case ISTATE_SEND_LOGOUTRSP
:
2213 ret
= isert_put_logout_rsp(cmd
, conn
);
2215 isert_conn
->logout_posted
= true;
2217 case ISTATE_SEND_NOPIN
:
2218 ret
= isert_put_nopin(cmd
, conn
, true);
2220 case ISTATE_SEND_TASKMGTRSP
:
2221 ret
= isert_put_tm_rsp(cmd
, conn
);
2223 case ISTATE_SEND_REJECT
:
2224 ret
= isert_put_reject(cmd
, conn
);
2226 case ISTATE_SEND_TEXTRSP
:
2227 ret
= isert_put_text_rsp(cmd
, conn
);
2229 case ISTATE_SEND_STATUS
:
2231 * Special case for sending non GOOD SCSI status from TX thread
2232 * context during pre se_cmd excecution failure.
2234 ret
= isert_put_response(conn
, cmd
);
2237 isert_err("Unknown response state: 0x%02x\n", state
);
2246 isert_setup_id(struct isert_np
*isert_np
)
2248 struct iscsi_np
*np
= isert_np
->np
;
2249 struct rdma_cm_id
*id
;
2250 struct sockaddr
*sa
;
2253 sa
= (struct sockaddr
*)&np
->np_sockaddr
;
2254 isert_dbg("ksockaddr: %p, sa: %p\n", &np
->np_sockaddr
, sa
);
2256 id
= rdma_create_id(&init_net
, isert_cma_handler
, isert_np
,
2257 RDMA_PS_TCP
, IB_QPT_RC
);
2259 isert_err("rdma_create_id() failed: %ld\n", PTR_ERR(id
));
2263 isert_dbg("id %p context %p\n", id
, id
->context
);
2265 ret
= rdma_bind_addr(id
, sa
);
2267 isert_err("rdma_bind_addr() failed: %d\n", ret
);
2271 ret
= rdma_listen(id
, 0);
2273 isert_err("rdma_listen() failed: %d\n", ret
);
2279 rdma_destroy_id(id
);
2281 return ERR_PTR(ret
);
2285 isert_setup_np(struct iscsi_np
*np
,
2286 struct sockaddr_storage
*ksockaddr
)
2288 struct isert_np
*isert_np
;
2289 struct rdma_cm_id
*isert_lid
;
2292 isert_np
= kzalloc(sizeof(struct isert_np
), GFP_KERNEL
);
2294 isert_err("Unable to allocate struct isert_np\n");
2297 sema_init(&isert_np
->sem
, 0);
2298 mutex_init(&isert_np
->mutex
);
2299 INIT_LIST_HEAD(&isert_np
->accepted
);
2300 INIT_LIST_HEAD(&isert_np
->pending
);
2304 * Setup the np->np_sockaddr from the passed sockaddr setup
2305 * in iscsi_target_configfs.c code..
2307 memcpy(&np
->np_sockaddr
, ksockaddr
,
2308 sizeof(struct sockaddr_storage
));
2310 isert_lid
= isert_setup_id(isert_np
);
2311 if (IS_ERR(isert_lid
)) {
2312 ret
= PTR_ERR(isert_lid
);
2316 isert_np
->cm_id
= isert_lid
;
2317 np
->np_context
= isert_np
;
2328 isert_rdma_accept(struct isert_conn
*isert_conn
)
2330 struct rdma_cm_id
*cm_id
= isert_conn
->cm_id
;
2331 struct rdma_conn_param cp
;
2333 struct iser_cm_hdr rsp_hdr
;
2335 memset(&cp
, 0, sizeof(struct rdma_conn_param
));
2336 cp
.initiator_depth
= isert_conn
->initiator_depth
;
2338 cp
.rnr_retry_count
= 7;
2340 memset(&rsp_hdr
, 0, sizeof(rsp_hdr
));
2341 rsp_hdr
.flags
= ISERT_ZBVA_NOT_USED
;
2342 if (!isert_conn
->snd_w_inv
)
2343 rsp_hdr
.flags
= rsp_hdr
.flags
| ISERT_SEND_W_INV_NOT_USED
;
2344 cp
.private_data
= (void *)&rsp_hdr
;
2345 cp
.private_data_len
= sizeof(rsp_hdr
);
2347 ret
= rdma_accept(cm_id
, &cp
);
2349 isert_err("rdma_accept() failed with: %d\n", ret
);
2357 isert_get_login_rx(struct iscsi_conn
*conn
, struct iscsi_login
*login
)
2359 struct isert_conn
*isert_conn
= conn
->context
;
2362 isert_info("before login_req comp conn: %p\n", isert_conn
);
2363 ret
= wait_for_completion_interruptible(&isert_conn
->login_req_comp
);
2365 isert_err("isert_conn %p interrupted before got login req\n",
2369 reinit_completion(&isert_conn
->login_req_comp
);
2372 * For login requests after the first PDU, isert_rx_login_req() will
2373 * kick schedule_delayed_work(&conn->login_work) as the packet is
2374 * received, which turns this callback from iscsi_target_do_login_rx()
2377 if (!login
->first_request
)
2380 isert_rx_login_req(isert_conn
);
2382 isert_info("before login_comp conn: %p\n", conn
);
2383 ret
= wait_for_completion_interruptible(&isert_conn
->login_comp
);
2387 isert_info("processing login->req: %p\n", login
->req
);
2393 isert_set_conn_info(struct iscsi_np
*np
, struct iscsi_conn
*conn
,
2394 struct isert_conn
*isert_conn
)
2396 struct rdma_cm_id
*cm_id
= isert_conn
->cm_id
;
2397 struct rdma_route
*cm_route
= &cm_id
->route
;
2399 conn
->login_family
= np
->np_sockaddr
.ss_family
;
2401 conn
->login_sockaddr
= cm_route
->addr
.dst_addr
;
2402 conn
->local_sockaddr
= cm_route
->addr
.src_addr
;
2406 isert_accept_np(struct iscsi_np
*np
, struct iscsi_conn
*conn
)
2408 struct isert_np
*isert_np
= np
->np_context
;
2409 struct isert_conn
*isert_conn
;
2413 ret
= down_interruptible(&isert_np
->sem
);
2417 spin_lock_bh(&np
->np_thread_lock
);
2418 if (np
->np_thread_state
>= ISCSI_NP_THREAD_RESET
) {
2419 spin_unlock_bh(&np
->np_thread_lock
);
2420 isert_dbg("np_thread_state %d\n",
2421 np
->np_thread_state
);
2423 * No point in stalling here when np_thread
2424 * is in state RESET/SHUTDOWN/EXIT - bail
2428 spin_unlock_bh(&np
->np_thread_lock
);
2430 mutex_lock(&isert_np
->mutex
);
2431 if (list_empty(&isert_np
->pending
)) {
2432 mutex_unlock(&isert_np
->mutex
);
2435 isert_conn
= list_first_entry(&isert_np
->pending
,
2436 struct isert_conn
, node
);
2437 list_del_init(&isert_conn
->node
);
2438 mutex_unlock(&isert_np
->mutex
);
2440 conn
->context
= isert_conn
;
2441 isert_conn
->conn
= conn
;
2442 isert_conn
->state
= ISER_CONN_BOUND
;
2444 isert_set_conn_info(np
, conn
, isert_conn
);
2446 isert_dbg("Processing isert_conn: %p\n", isert_conn
);
2452 isert_free_np(struct iscsi_np
*np
)
2454 struct isert_np
*isert_np
= np
->np_context
;
2455 struct isert_conn
*isert_conn
, *n
;
2457 if (isert_np
->cm_id
)
2458 rdma_destroy_id(isert_np
->cm_id
);
2461 * FIXME: At this point we don't have a good way to insure
2462 * that at this point we don't have hanging connections that
2463 * completed RDMA establishment but didn't start iscsi login
2464 * process. So work-around this by cleaning up what ever piled
2465 * up in accepted and pending lists.
2467 mutex_lock(&isert_np
->mutex
);
2468 if (!list_empty(&isert_np
->pending
)) {
2469 isert_info("Still have isert pending connections\n");
2470 list_for_each_entry_safe(isert_conn
, n
,
2473 isert_info("cleaning isert_conn %p state (%d)\n",
2474 isert_conn
, isert_conn
->state
);
2475 isert_connect_release(isert_conn
);
2479 if (!list_empty(&isert_np
->accepted
)) {
2480 isert_info("Still have isert accepted connections\n");
2481 list_for_each_entry_safe(isert_conn
, n
,
2482 &isert_np
->accepted
,
2484 isert_info("cleaning isert_conn %p state (%d)\n",
2485 isert_conn
, isert_conn
->state
);
2486 isert_connect_release(isert_conn
);
2489 mutex_unlock(&isert_np
->mutex
);
2491 np
->np_context
= NULL
;
2495 static void isert_release_work(struct work_struct
*work
)
2497 struct isert_conn
*isert_conn
= container_of(work
,
2501 isert_info("Starting release conn %p\n", isert_conn
);
2503 mutex_lock(&isert_conn
->mutex
);
2504 isert_conn
->state
= ISER_CONN_DOWN
;
2505 mutex_unlock(&isert_conn
->mutex
);
2507 isert_info("Destroying conn %p\n", isert_conn
);
2508 isert_put_conn(isert_conn
);
2512 isert_wait4logout(struct isert_conn
*isert_conn
)
2514 struct iscsi_conn
*conn
= isert_conn
->conn
;
2516 isert_info("conn %p\n", isert_conn
);
2518 if (isert_conn
->logout_posted
) {
2519 isert_info("conn %p wait for conn_logout_comp\n", isert_conn
);
2520 wait_for_completion_timeout(&conn
->conn_logout_comp
,
2521 SECONDS_FOR_LOGOUT_COMP
* HZ
);
2526 isert_wait4cmds(struct iscsi_conn
*conn
)
2528 isert_info("iscsi_conn %p\n", conn
);
2531 target_sess_cmd_list_set_waiting(conn
->sess
->se_sess
);
2532 target_wait_for_sess_cmds(conn
->sess
->se_sess
);
2537 * isert_put_unsol_pending_cmds() - Drop commands waiting for
2538 * unsolicitate dataout
2539 * @conn: iscsi connection
2541 * We might still have commands that are waiting for unsolicited
2542 * dataouts messages. We must put the extra reference on those
2543 * before blocking on the target_wait_for_session_cmds
2546 isert_put_unsol_pending_cmds(struct iscsi_conn
*conn
)
2548 struct iscsi_cmd
*cmd
, *tmp
;
2549 static LIST_HEAD(drop_cmd_list
);
2551 spin_lock_bh(&conn
->cmd_lock
);
2552 list_for_each_entry_safe(cmd
, tmp
, &conn
->conn_cmd_list
, i_conn_node
) {
2553 if ((cmd
->cmd_flags
& ICF_NON_IMMEDIATE_UNSOLICITED_DATA
) &&
2554 (cmd
->write_data_done
< conn
->sess
->sess_ops
->FirstBurstLength
) &&
2555 (cmd
->write_data_done
< cmd
->se_cmd
.data_length
))
2556 list_move_tail(&cmd
->i_conn_node
, &drop_cmd_list
);
2558 spin_unlock_bh(&conn
->cmd_lock
);
2560 list_for_each_entry_safe(cmd
, tmp
, &drop_cmd_list
, i_conn_node
) {
2561 list_del_init(&cmd
->i_conn_node
);
2562 if (cmd
->i_state
!= ISTATE_REMOVE
) {
2563 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
2565 isert_info("conn %p dropping cmd %p\n", conn
, cmd
);
2566 isert_put_cmd(isert_cmd
, true);
2571 static void isert_wait_conn(struct iscsi_conn
*conn
)
2573 struct isert_conn
*isert_conn
= conn
->context
;
2575 isert_info("Starting conn %p\n", isert_conn
);
2577 mutex_lock(&isert_conn
->mutex
);
2578 isert_conn_terminate(isert_conn
);
2579 mutex_unlock(&isert_conn
->mutex
);
2581 ib_drain_qp(isert_conn
->qp
);
2582 isert_put_unsol_pending_cmds(conn
);
2583 isert_wait4cmds(conn
);
2584 isert_wait4logout(isert_conn
);
2586 queue_work(isert_release_wq
, &isert_conn
->release_work
);
2589 static void isert_free_conn(struct iscsi_conn
*conn
)
2591 struct isert_conn
*isert_conn
= conn
->context
;
2593 ib_drain_qp(isert_conn
->qp
);
2594 isert_put_conn(isert_conn
);
2597 static void isert_get_rx_pdu(struct iscsi_conn
*conn
)
2599 struct completion comp
;
2601 init_completion(&comp
);
2603 wait_for_completion_interruptible(&comp
);
2606 static struct iscsit_transport iser_target_transport
= {
2608 .transport_type
= ISCSI_INFINIBAND
,
2609 .rdma_shutdown
= true,
2610 .priv_size
= sizeof(struct isert_cmd
),
2611 .owner
= THIS_MODULE
,
2612 .iscsit_setup_np
= isert_setup_np
,
2613 .iscsit_accept_np
= isert_accept_np
,
2614 .iscsit_free_np
= isert_free_np
,
2615 .iscsit_wait_conn
= isert_wait_conn
,
2616 .iscsit_free_conn
= isert_free_conn
,
2617 .iscsit_get_login_rx
= isert_get_login_rx
,
2618 .iscsit_put_login_tx
= isert_put_login_tx
,
2619 .iscsit_immediate_queue
= isert_immediate_queue
,
2620 .iscsit_response_queue
= isert_response_queue
,
2621 .iscsit_get_dataout
= isert_get_dataout
,
2622 .iscsit_queue_data_in
= isert_put_datain
,
2623 .iscsit_queue_status
= isert_put_response
,
2624 .iscsit_aborted_task
= isert_aborted_task
,
2625 .iscsit_get_rx_pdu
= isert_get_rx_pdu
,
2626 .iscsit_get_sup_prot_ops
= isert_get_sup_prot_ops
,
2629 static int __init
isert_init(void)
2633 isert_comp_wq
= alloc_workqueue("isert_comp_wq",
2634 WQ_UNBOUND
| WQ_HIGHPRI
, 0);
2635 if (!isert_comp_wq
) {
2636 isert_err("Unable to allocate isert_comp_wq\n");
2641 isert_release_wq
= alloc_workqueue("isert_release_wq", WQ_UNBOUND
,
2642 WQ_UNBOUND_MAX_ACTIVE
);
2643 if (!isert_release_wq
) {
2644 isert_err("Unable to allocate isert_release_wq\n");
2646 goto destroy_comp_wq
;
2649 iscsit_register_transport(&iser_target_transport
);
2650 isert_info("iSER_TARGET[0] - Loaded iser_target_transport\n");
2655 destroy_workqueue(isert_comp_wq
);
2660 static void __exit
isert_exit(void)
2662 flush_scheduled_work();
2663 destroy_workqueue(isert_release_wq
);
2664 destroy_workqueue(isert_comp_wq
);
2665 iscsit_unregister_transport(&iser_target_transport
);
2666 isert_info("iSER_TARGET[0] - Released iser_target_transport\n");
2669 MODULE_DESCRIPTION("iSER-Target for mainline target infrastructure");
2670 MODULE_VERSION("1.0");
2671 MODULE_AUTHOR("nab@Linux-iSCSI.org");
2672 MODULE_LICENSE("GPL");
2674 module_init(isert_init
);
2675 module_exit(isert_exit
);