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 init_waitqueue_head(&isert_conn
->rem_wait
);
407 kref_init(&isert_conn
->kref
);
408 mutex_init(&isert_conn
->mutex
);
409 INIT_WORK(&isert_conn
->release_work
, isert_release_work
);
413 isert_free_login_buf(struct isert_conn
*isert_conn
)
415 struct ib_device
*ib_dev
= isert_conn
->device
->ib_device
;
417 ib_dma_unmap_single(ib_dev
, isert_conn
->login_rsp_dma
,
418 ISER_RX_PAYLOAD_SIZE
, DMA_TO_DEVICE
);
419 kfree(isert_conn
->login_rsp_buf
);
421 ib_dma_unmap_single(ib_dev
, isert_conn
->login_req_dma
,
422 ISER_RX_PAYLOAD_SIZE
,
424 kfree(isert_conn
->login_req_buf
);
428 isert_alloc_login_buf(struct isert_conn
*isert_conn
,
429 struct ib_device
*ib_dev
)
433 isert_conn
->login_req_buf
= kzalloc(sizeof(*isert_conn
->login_req_buf
),
435 if (!isert_conn
->login_req_buf
) {
436 isert_err("Unable to allocate isert_conn->login_buf\n");
440 isert_conn
->login_req_dma
= ib_dma_map_single(ib_dev
,
441 isert_conn
->login_req_buf
,
442 ISER_RX_PAYLOAD_SIZE
, DMA_FROM_DEVICE
);
443 ret
= ib_dma_mapping_error(ib_dev
, isert_conn
->login_req_dma
);
445 isert_err("login_req_dma mapping error: %d\n", ret
);
446 isert_conn
->login_req_dma
= 0;
447 goto out_free_login_req_buf
;
450 isert_conn
->login_rsp_buf
= kzalloc(ISER_RX_PAYLOAD_SIZE
, GFP_KERNEL
);
451 if (!isert_conn
->login_rsp_buf
) {
453 goto out_unmap_login_req_buf
;
456 isert_conn
->login_rsp_dma
= ib_dma_map_single(ib_dev
,
457 isert_conn
->login_rsp_buf
,
458 ISER_RX_PAYLOAD_SIZE
, DMA_TO_DEVICE
);
459 ret
= ib_dma_mapping_error(ib_dev
, isert_conn
->login_rsp_dma
);
461 isert_err("login_rsp_dma mapping error: %d\n", ret
);
462 isert_conn
->login_rsp_dma
= 0;
463 goto out_free_login_rsp_buf
;
468 out_free_login_rsp_buf
:
469 kfree(isert_conn
->login_rsp_buf
);
470 out_unmap_login_req_buf
:
471 ib_dma_unmap_single(ib_dev
, isert_conn
->login_req_dma
,
472 ISER_RX_PAYLOAD_SIZE
, DMA_FROM_DEVICE
);
473 out_free_login_req_buf
:
474 kfree(isert_conn
->login_req_buf
);
479 isert_set_nego_params(struct isert_conn
*isert_conn
,
480 struct rdma_conn_param
*param
)
482 struct ib_device_attr
*attr
= &isert_conn
->device
->ib_device
->attrs
;
484 /* Set max inflight RDMA READ requests */
485 isert_conn
->initiator_depth
= min_t(u8
, param
->initiator_depth
,
486 attr
->max_qp_init_rd_atom
);
487 isert_dbg("Using initiator_depth: %u\n", isert_conn
->initiator_depth
);
489 if (param
->private_data
) {
490 u8 flags
= *(u8
*)param
->private_data
;
493 * use remote invalidation if the both initiator
494 * and the HCA support it
496 isert_conn
->snd_w_inv
= !(flags
& ISER_SEND_W_INV_NOT_SUP
) &&
497 (attr
->device_cap_flags
&
498 IB_DEVICE_MEM_MGT_EXTENSIONS
);
499 if (isert_conn
->snd_w_inv
)
500 isert_info("Using remote invalidation\n");
505 isert_connect_request(struct rdma_cm_id
*cma_id
, struct rdma_cm_event
*event
)
507 struct isert_np
*isert_np
= cma_id
->context
;
508 struct iscsi_np
*np
= isert_np
->np
;
509 struct isert_conn
*isert_conn
;
510 struct isert_device
*device
;
513 spin_lock_bh(&np
->np_thread_lock
);
515 spin_unlock_bh(&np
->np_thread_lock
);
516 isert_dbg("iscsi_np is not enabled, reject connect request\n");
517 return rdma_reject(cma_id
, NULL
, 0);
519 spin_unlock_bh(&np
->np_thread_lock
);
521 isert_dbg("cma_id: %p, portal: %p\n",
522 cma_id
, cma_id
->context
);
524 isert_conn
= kzalloc(sizeof(struct isert_conn
), GFP_KERNEL
);
528 isert_init_conn(isert_conn
);
529 isert_conn
->cm_id
= cma_id
;
531 ret
= isert_alloc_login_buf(isert_conn
, cma_id
->device
);
535 device
= isert_device_get(cma_id
);
536 if (IS_ERR(device
)) {
537 ret
= PTR_ERR(device
);
538 goto out_rsp_dma_map
;
540 isert_conn
->device
= device
;
542 isert_set_nego_params(isert_conn
, &event
->param
.conn
);
544 ret
= isert_conn_setup_qp(isert_conn
, cma_id
);
548 ret
= isert_login_post_recv(isert_conn
);
552 ret
= isert_rdma_accept(isert_conn
);
556 mutex_lock(&isert_np
->mutex
);
557 list_add_tail(&isert_conn
->node
, &isert_np
->accepted
);
558 mutex_unlock(&isert_np
->mutex
);
563 isert_device_put(device
);
565 isert_free_login_buf(isert_conn
);
568 rdma_reject(cma_id
, NULL
, 0);
573 isert_connect_release(struct isert_conn
*isert_conn
)
575 struct isert_device
*device
= isert_conn
->device
;
577 isert_dbg("conn %p\n", isert_conn
);
581 isert_free_rx_descriptors(isert_conn
);
582 if (isert_conn
->cm_id
&&
583 !isert_conn
->dev_removed
)
584 rdma_destroy_id(isert_conn
->cm_id
);
586 if (isert_conn
->qp
) {
587 struct isert_comp
*comp
= isert_conn
->qp
->recv_cq
->cq_context
;
589 isert_comp_put(comp
);
590 ib_destroy_qp(isert_conn
->qp
);
593 if (isert_conn
->login_req_buf
)
594 isert_free_login_buf(isert_conn
);
596 isert_device_put(device
);
598 if (isert_conn
->dev_removed
)
599 wake_up_interruptible(&isert_conn
->rem_wait
);
605 isert_connected_handler(struct rdma_cm_id
*cma_id
)
607 struct isert_conn
*isert_conn
= cma_id
->qp
->qp_context
;
608 struct isert_np
*isert_np
= cma_id
->context
;
610 isert_info("conn %p\n", isert_conn
);
612 mutex_lock(&isert_conn
->mutex
);
613 isert_conn
->state
= ISER_CONN_UP
;
614 kref_get(&isert_conn
->kref
);
615 mutex_unlock(&isert_conn
->mutex
);
617 mutex_lock(&isert_np
->mutex
);
618 list_move_tail(&isert_conn
->node
, &isert_np
->pending
);
619 mutex_unlock(&isert_np
->mutex
);
621 isert_info("np %p: Allow accept_np to continue\n", isert_np
);
626 isert_release_kref(struct kref
*kref
)
628 struct isert_conn
*isert_conn
= container_of(kref
,
629 struct isert_conn
, kref
);
631 isert_info("conn %p final kref %s/%d\n", isert_conn
, current
->comm
,
634 isert_connect_release(isert_conn
);
638 isert_put_conn(struct isert_conn
*isert_conn
)
640 kref_put(&isert_conn
->kref
, isert_release_kref
);
644 isert_handle_unbound_conn(struct isert_conn
*isert_conn
)
646 struct isert_np
*isert_np
= isert_conn
->cm_id
->context
;
648 mutex_lock(&isert_np
->mutex
);
649 if (!list_empty(&isert_conn
->node
)) {
651 * This means iscsi doesn't know this connection
652 * so schedule a cleanup ourselves
654 list_del_init(&isert_conn
->node
);
655 isert_put_conn(isert_conn
);
656 queue_work(isert_release_wq
, &isert_conn
->release_work
);
658 mutex_unlock(&isert_np
->mutex
);
662 * isert_conn_terminate() - Initiate connection termination
663 * @isert_conn: isert connection struct
666 * In case the connection state is BOUND, move state
667 * to TEMINATING and start teardown sequence (rdma_disconnect).
668 * In case the connection state is UP, complete flush as well.
670 * This routine must be called with mutex held. Thus it is
671 * safe to call multiple times.
674 isert_conn_terminate(struct isert_conn
*isert_conn
)
678 if (isert_conn
->state
>= ISER_CONN_TERMINATING
)
681 isert_info("Terminating conn %p state %d\n",
682 isert_conn
, isert_conn
->state
);
683 isert_conn
->state
= ISER_CONN_TERMINATING
;
684 err
= rdma_disconnect(isert_conn
->cm_id
);
686 isert_warn("Failed rdma_disconnect isert_conn %p\n",
691 isert_np_cma_handler(struct isert_np
*isert_np
,
692 enum rdma_cm_event_type event
)
694 isert_dbg("%s (%d): isert np %p\n",
695 rdma_event_msg(event
), event
, isert_np
);
698 case RDMA_CM_EVENT_DEVICE_REMOVAL
:
699 isert_np
->cm_id
= NULL
;
701 case RDMA_CM_EVENT_ADDR_CHANGE
:
702 isert_np
->cm_id
= isert_setup_id(isert_np
);
703 if (IS_ERR(isert_np
->cm_id
)) {
704 isert_err("isert np %p setup id failed: %ld\n",
705 isert_np
, PTR_ERR(isert_np
->cm_id
));
706 isert_np
->cm_id
= NULL
;
710 isert_err("isert np %p Unexpected event %d\n",
718 isert_disconnected_handler(struct rdma_cm_id
*cma_id
,
719 enum rdma_cm_event_type event
)
721 struct isert_conn
*isert_conn
= cma_id
->qp
->qp_context
;
723 mutex_lock(&isert_conn
->mutex
);
724 switch (isert_conn
->state
) {
725 case ISER_CONN_TERMINATING
:
728 isert_conn_terminate(isert_conn
);
729 ib_drain_qp(isert_conn
->qp
);
730 isert_handle_unbound_conn(isert_conn
);
732 case ISER_CONN_BOUND
:
733 case ISER_CONN_FULL_FEATURE
: /* FALLTHRU */
734 iscsit_cause_connection_reinstatement(isert_conn
->conn
, 0);
737 isert_warn("conn %p teminating in state %d\n",
738 isert_conn
, isert_conn
->state
);
740 mutex_unlock(&isert_conn
->mutex
);
746 isert_connect_error(struct rdma_cm_id
*cma_id
)
748 struct isert_conn
*isert_conn
= cma_id
->qp
->qp_context
;
750 list_del_init(&isert_conn
->node
);
751 isert_conn
->cm_id
= NULL
;
752 isert_put_conn(isert_conn
);
758 isert_cma_handler(struct rdma_cm_id
*cma_id
, struct rdma_cm_event
*event
)
760 struct isert_np
*isert_np
= cma_id
->context
;
761 struct isert_conn
*isert_conn
;
764 isert_info("%s (%d): status %d id %p np %p\n",
765 rdma_event_msg(event
->event
), event
->event
,
766 event
->status
, cma_id
, cma_id
->context
);
768 if (isert_np
->cm_id
== cma_id
)
769 return isert_np_cma_handler(cma_id
->context
, event
->event
);
771 switch (event
->event
) {
772 case RDMA_CM_EVENT_CONNECT_REQUEST
:
773 ret
= isert_connect_request(cma_id
, event
);
775 isert_err("failed handle connect request %d\n", ret
);
777 case RDMA_CM_EVENT_ESTABLISHED
:
778 isert_connected_handler(cma_id
);
780 case RDMA_CM_EVENT_ADDR_CHANGE
: /* FALLTHRU */
781 case RDMA_CM_EVENT_DISCONNECTED
: /* FALLTHRU */
782 case RDMA_CM_EVENT_TIMEWAIT_EXIT
: /* FALLTHRU */
783 ret
= isert_disconnected_handler(cma_id
, event
->event
);
785 case RDMA_CM_EVENT_DEVICE_REMOVAL
:
786 isert_conn
= cma_id
->qp
->qp_context
;
787 isert_conn
->dev_removed
= true;
788 isert_disconnected_handler(cma_id
, event
->event
);
789 wait_event_interruptible(isert_conn
->rem_wait
,
790 isert_conn
->state
== ISER_CONN_DOWN
);
793 * return non-zero from the callback to destroy
797 case RDMA_CM_EVENT_REJECTED
: /* FALLTHRU */
798 case RDMA_CM_EVENT_UNREACHABLE
: /* FALLTHRU */
799 case RDMA_CM_EVENT_CONNECT_ERROR
:
800 ret
= isert_connect_error(cma_id
);
803 isert_err("Unhandled RDMA CMA event: %d\n", event
->event
);
811 isert_post_recvm(struct isert_conn
*isert_conn
, u32 count
)
813 struct ib_recv_wr
*rx_wr
, *rx_wr_failed
;
815 struct iser_rx_desc
*rx_desc
;
817 for (rx_wr
= isert_conn
->rx_wr
, i
= 0; i
< count
; i
++, rx_wr
++) {
818 rx_desc
= &isert_conn
->rx_descs
[i
];
820 rx_wr
->wr_cqe
= &rx_desc
->rx_cqe
;
821 rx_wr
->sg_list
= &rx_desc
->rx_sg
;
823 rx_wr
->next
= rx_wr
+ 1;
826 rx_wr
->next
= NULL
; /* mark end of work requests list */
828 ret
= ib_post_recv(isert_conn
->qp
, isert_conn
->rx_wr
,
831 isert_err("ib_post_recv() failed with ret: %d\n", ret
);
837 isert_post_recv(struct isert_conn
*isert_conn
, struct iser_rx_desc
*rx_desc
)
839 struct ib_recv_wr
*rx_wr_failed
, rx_wr
;
842 rx_wr
.wr_cqe
= &rx_desc
->rx_cqe
;
843 rx_wr
.sg_list
= &rx_desc
->rx_sg
;
847 ret
= ib_post_recv(isert_conn
->qp
, &rx_wr
, &rx_wr_failed
);
849 isert_err("ib_post_recv() failed with ret: %d\n", ret
);
855 isert_login_post_send(struct isert_conn
*isert_conn
, struct iser_tx_desc
*tx_desc
)
857 struct ib_device
*ib_dev
= isert_conn
->cm_id
->device
;
858 struct ib_send_wr send_wr
, *send_wr_failed
;
861 ib_dma_sync_single_for_device(ib_dev
, tx_desc
->dma_addr
,
862 ISER_HEADERS_LEN
, DMA_TO_DEVICE
);
864 tx_desc
->tx_cqe
.done
= isert_login_send_done
;
867 send_wr
.wr_cqe
= &tx_desc
->tx_cqe
;
868 send_wr
.sg_list
= tx_desc
->tx_sg
;
869 send_wr
.num_sge
= tx_desc
->num_sge
;
870 send_wr
.opcode
= IB_WR_SEND
;
871 send_wr
.send_flags
= IB_SEND_SIGNALED
;
873 ret
= ib_post_send(isert_conn
->qp
, &send_wr
, &send_wr_failed
);
875 isert_err("ib_post_send() failed, ret: %d\n", ret
);
881 isert_create_send_desc(struct isert_conn
*isert_conn
,
882 struct isert_cmd
*isert_cmd
,
883 struct iser_tx_desc
*tx_desc
)
885 struct isert_device
*device
= isert_conn
->device
;
886 struct ib_device
*ib_dev
= device
->ib_device
;
888 ib_dma_sync_single_for_cpu(ib_dev
, tx_desc
->dma_addr
,
889 ISER_HEADERS_LEN
, DMA_TO_DEVICE
);
891 memset(&tx_desc
->iser_header
, 0, sizeof(struct iser_ctrl
));
892 tx_desc
->iser_header
.flags
= ISCSI_CTRL
;
894 tx_desc
->num_sge
= 1;
896 if (tx_desc
->tx_sg
[0].lkey
!= device
->pd
->local_dma_lkey
) {
897 tx_desc
->tx_sg
[0].lkey
= device
->pd
->local_dma_lkey
;
898 isert_dbg("tx_desc %p lkey mismatch, fixing\n", tx_desc
);
903 isert_init_tx_hdrs(struct isert_conn
*isert_conn
,
904 struct iser_tx_desc
*tx_desc
)
906 struct isert_device
*device
= isert_conn
->device
;
907 struct ib_device
*ib_dev
= device
->ib_device
;
910 dma_addr
= ib_dma_map_single(ib_dev
, (void *)tx_desc
,
911 ISER_HEADERS_LEN
, DMA_TO_DEVICE
);
912 if (ib_dma_mapping_error(ib_dev
, dma_addr
)) {
913 isert_err("ib_dma_mapping_error() failed\n");
917 tx_desc
->dma_addr
= dma_addr
;
918 tx_desc
->tx_sg
[0].addr
= tx_desc
->dma_addr
;
919 tx_desc
->tx_sg
[0].length
= ISER_HEADERS_LEN
;
920 tx_desc
->tx_sg
[0].lkey
= device
->pd
->local_dma_lkey
;
922 isert_dbg("Setup tx_sg[0].addr: 0x%llx length: %u lkey: 0x%x\n",
923 tx_desc
->tx_sg
[0].addr
, tx_desc
->tx_sg
[0].length
,
924 tx_desc
->tx_sg
[0].lkey
);
930 isert_init_send_wr(struct isert_conn
*isert_conn
, struct isert_cmd
*isert_cmd
,
931 struct ib_send_wr
*send_wr
)
933 struct iser_tx_desc
*tx_desc
= &isert_cmd
->tx_desc
;
935 tx_desc
->tx_cqe
.done
= isert_send_done
;
936 send_wr
->wr_cqe
= &tx_desc
->tx_cqe
;
938 if (isert_conn
->snd_w_inv
&& isert_cmd
->inv_rkey
) {
939 send_wr
->opcode
= IB_WR_SEND_WITH_INV
;
940 send_wr
->ex
.invalidate_rkey
= isert_cmd
->inv_rkey
;
942 send_wr
->opcode
= IB_WR_SEND
;
945 send_wr
->sg_list
= &tx_desc
->tx_sg
[0];
946 send_wr
->num_sge
= isert_cmd
->tx_desc
.num_sge
;
947 send_wr
->send_flags
= IB_SEND_SIGNALED
;
951 isert_login_post_recv(struct isert_conn
*isert_conn
)
953 struct ib_recv_wr rx_wr
, *rx_wr_fail
;
957 memset(&sge
, 0, sizeof(struct ib_sge
));
958 sge
.addr
= isert_conn
->login_req_dma
;
959 sge
.length
= ISER_RX_PAYLOAD_SIZE
;
960 sge
.lkey
= isert_conn
->device
->pd
->local_dma_lkey
;
962 isert_dbg("Setup sge: addr: %llx length: %d 0x%08x\n",
963 sge
.addr
, sge
.length
, sge
.lkey
);
965 isert_conn
->login_req_buf
->rx_cqe
.done
= isert_login_recv_done
;
967 memset(&rx_wr
, 0, sizeof(struct ib_recv_wr
));
968 rx_wr
.wr_cqe
= &isert_conn
->login_req_buf
->rx_cqe
;
969 rx_wr
.sg_list
= &sge
;
972 ret
= ib_post_recv(isert_conn
->qp
, &rx_wr
, &rx_wr_fail
);
974 isert_err("ib_post_recv() failed: %d\n", ret
);
980 isert_put_login_tx(struct iscsi_conn
*conn
, struct iscsi_login
*login
,
983 struct isert_conn
*isert_conn
= conn
->context
;
984 struct isert_device
*device
= isert_conn
->device
;
985 struct ib_device
*ib_dev
= device
->ib_device
;
986 struct iser_tx_desc
*tx_desc
= &isert_conn
->login_tx_desc
;
989 isert_create_send_desc(isert_conn
, NULL
, tx_desc
);
991 memcpy(&tx_desc
->iscsi_header
, &login
->rsp
[0],
992 sizeof(struct iscsi_hdr
));
994 isert_init_tx_hdrs(isert_conn
, tx_desc
);
997 struct ib_sge
*tx_dsg
= &tx_desc
->tx_sg
[1];
999 ib_dma_sync_single_for_cpu(ib_dev
, isert_conn
->login_rsp_dma
,
1000 length
, DMA_TO_DEVICE
);
1002 memcpy(isert_conn
->login_rsp_buf
, login
->rsp_buf
, length
);
1004 ib_dma_sync_single_for_device(ib_dev
, isert_conn
->login_rsp_dma
,
1005 length
, DMA_TO_DEVICE
);
1007 tx_dsg
->addr
= isert_conn
->login_rsp_dma
;
1008 tx_dsg
->length
= length
;
1009 tx_dsg
->lkey
= isert_conn
->device
->pd
->local_dma_lkey
;
1010 tx_desc
->num_sge
= 2;
1012 if (!login
->login_failed
) {
1013 if (login
->login_complete
) {
1014 ret
= isert_alloc_rx_descriptors(isert_conn
);
1018 ret
= isert_post_recvm(isert_conn
,
1019 ISERT_QP_MAX_RECV_DTOS
);
1023 /* Now we are in FULL_FEATURE phase */
1024 mutex_lock(&isert_conn
->mutex
);
1025 isert_conn
->state
= ISER_CONN_FULL_FEATURE
;
1026 mutex_unlock(&isert_conn
->mutex
);
1030 ret
= isert_login_post_recv(isert_conn
);
1035 ret
= isert_login_post_send(isert_conn
, tx_desc
);
1043 isert_rx_login_req(struct isert_conn
*isert_conn
)
1045 struct iser_rx_desc
*rx_desc
= isert_conn
->login_req_buf
;
1046 int rx_buflen
= isert_conn
->login_req_len
;
1047 struct iscsi_conn
*conn
= isert_conn
->conn
;
1048 struct iscsi_login
*login
= conn
->conn_login
;
1051 isert_info("conn %p\n", isert_conn
);
1053 WARN_ON_ONCE(!login
);
1055 if (login
->first_request
) {
1056 struct iscsi_login_req
*login_req
=
1057 (struct iscsi_login_req
*)&rx_desc
->iscsi_header
;
1059 * Setup the initial iscsi_login values from the leading
1060 * login request PDU.
1062 login
->leading_connection
= (!login_req
->tsih
) ? 1 : 0;
1063 login
->current_stage
=
1064 (login_req
->flags
& ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK
)
1066 login
->version_min
= login_req
->min_version
;
1067 login
->version_max
= login_req
->max_version
;
1068 memcpy(login
->isid
, login_req
->isid
, 6);
1069 login
->cmd_sn
= be32_to_cpu(login_req
->cmdsn
);
1070 login
->init_task_tag
= login_req
->itt
;
1071 login
->initial_exp_statsn
= be32_to_cpu(login_req
->exp_statsn
);
1072 login
->cid
= be16_to_cpu(login_req
->cid
);
1073 login
->tsih
= be16_to_cpu(login_req
->tsih
);
1076 memcpy(&login
->req
[0], (void *)&rx_desc
->iscsi_header
, ISCSI_HDR_LEN
);
1078 size
= min(rx_buflen
, MAX_KEY_VALUE_PAIRS
);
1079 isert_dbg("Using login payload size: %d, rx_buflen: %d "
1080 "MAX_KEY_VALUE_PAIRS: %d\n", size
, rx_buflen
,
1081 MAX_KEY_VALUE_PAIRS
);
1082 memcpy(login
->req_buf
, &rx_desc
->data
[0], size
);
1084 if (login
->first_request
) {
1085 complete(&isert_conn
->login_comp
);
1088 schedule_delayed_work(&conn
->login_work
, 0);
1091 static struct iscsi_cmd
1092 *isert_allocate_cmd(struct iscsi_conn
*conn
, struct iser_rx_desc
*rx_desc
)
1094 struct isert_conn
*isert_conn
= conn
->context
;
1095 struct isert_cmd
*isert_cmd
;
1096 struct iscsi_cmd
*cmd
;
1098 cmd
= iscsit_allocate_cmd(conn
, TASK_INTERRUPTIBLE
);
1100 isert_err("Unable to allocate iscsi_cmd + isert_cmd\n");
1103 isert_cmd
= iscsit_priv_cmd(cmd
);
1104 isert_cmd
->conn
= isert_conn
;
1105 isert_cmd
->iscsi_cmd
= cmd
;
1106 isert_cmd
->rx_desc
= rx_desc
;
1112 isert_handle_scsi_cmd(struct isert_conn
*isert_conn
,
1113 struct isert_cmd
*isert_cmd
, struct iscsi_cmd
*cmd
,
1114 struct iser_rx_desc
*rx_desc
, unsigned char *buf
)
1116 struct iscsi_conn
*conn
= isert_conn
->conn
;
1117 struct iscsi_scsi_req
*hdr
= (struct iscsi_scsi_req
*)buf
;
1118 int imm_data
, imm_data_len
, unsol_data
, sg_nents
, rc
;
1119 bool dump_payload
= false;
1120 unsigned int data_len
;
1122 rc
= iscsit_setup_scsi_cmd(conn
, cmd
, buf
);
1126 imm_data
= cmd
->immediate_data
;
1127 imm_data_len
= cmd
->first_burst_len
;
1128 unsol_data
= cmd
->unsolicited_data
;
1129 data_len
= cmd
->se_cmd
.data_length
;
1131 if (imm_data
&& imm_data_len
== data_len
)
1132 cmd
->se_cmd
.se_cmd_flags
|= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC
;
1133 rc
= iscsit_process_scsi_cmd(conn
, cmd
, hdr
);
1136 } else if (rc
> 0) {
1137 dump_payload
= true;
1144 if (imm_data_len
!= data_len
) {
1145 sg_nents
= max(1UL, DIV_ROUND_UP(imm_data_len
, PAGE_SIZE
));
1146 sg_copy_from_buffer(cmd
->se_cmd
.t_data_sg
, sg_nents
,
1147 &rx_desc
->data
[0], imm_data_len
);
1148 isert_dbg("Copy Immediate sg_nents: %u imm_data_len: %d\n",
1149 sg_nents
, imm_data_len
);
1151 sg_init_table(&isert_cmd
->sg
, 1);
1152 cmd
->se_cmd
.t_data_sg
= &isert_cmd
->sg
;
1153 cmd
->se_cmd
.t_data_nents
= 1;
1154 sg_set_buf(&isert_cmd
->sg
, &rx_desc
->data
[0], imm_data_len
);
1155 isert_dbg("Transfer Immediate imm_data_len: %d\n",
1159 cmd
->write_data_done
+= imm_data_len
;
1161 if (cmd
->write_data_done
== cmd
->se_cmd
.data_length
) {
1162 spin_lock_bh(&cmd
->istate_lock
);
1163 cmd
->cmd_flags
|= ICF_GOT_LAST_DATAOUT
;
1164 cmd
->i_state
= ISTATE_RECEIVED_LAST_DATAOUT
;
1165 spin_unlock_bh(&cmd
->istate_lock
);
1169 rc
= iscsit_sequence_cmd(conn
, cmd
, buf
, hdr
->cmdsn
);
1171 if (!rc
&& dump_payload
== false && unsol_data
)
1172 iscsit_set_unsoliticed_dataout(cmd
);
1173 else if (dump_payload
&& imm_data
)
1174 target_put_sess_cmd(&cmd
->se_cmd
);
1180 isert_handle_iscsi_dataout(struct isert_conn
*isert_conn
,
1181 struct iser_rx_desc
*rx_desc
, unsigned char *buf
)
1183 struct scatterlist
*sg_start
;
1184 struct iscsi_conn
*conn
= isert_conn
->conn
;
1185 struct iscsi_cmd
*cmd
= NULL
;
1186 struct iscsi_data
*hdr
= (struct iscsi_data
*)buf
;
1187 u32 unsol_data_len
= ntoh24(hdr
->dlength
);
1188 int rc
, sg_nents
, sg_off
, page_off
;
1190 rc
= iscsit_check_dataout_hdr(conn
, buf
, &cmd
);
1196 * FIXME: Unexpected unsolicited_data out
1198 if (!cmd
->unsolicited_data
) {
1199 isert_err("Received unexpected solicited data payload\n");
1204 isert_dbg("Unsolicited DataOut unsol_data_len: %u, "
1205 "write_data_done: %u, data_length: %u\n",
1206 unsol_data_len
, cmd
->write_data_done
,
1207 cmd
->se_cmd
.data_length
);
1209 sg_off
= cmd
->write_data_done
/ PAGE_SIZE
;
1210 sg_start
= &cmd
->se_cmd
.t_data_sg
[sg_off
];
1211 sg_nents
= max(1UL, DIV_ROUND_UP(unsol_data_len
, PAGE_SIZE
));
1212 page_off
= cmd
->write_data_done
% PAGE_SIZE
;
1214 * FIXME: Non page-aligned unsolicited_data out
1217 isert_err("unexpected non-page aligned data payload\n");
1221 isert_dbg("Copying DataOut: sg_start: %p, sg_off: %u "
1222 "sg_nents: %u from %p %u\n", sg_start
, sg_off
,
1223 sg_nents
, &rx_desc
->data
[0], unsol_data_len
);
1225 sg_copy_from_buffer(sg_start
, sg_nents
, &rx_desc
->data
[0],
1228 rc
= iscsit_check_dataout_payload(cmd
, hdr
, false);
1233 * multiple data-outs on the same command can arrive -
1234 * so post the buffer before hand
1236 rc
= isert_post_recv(isert_conn
, rx_desc
);
1238 isert_err("ib_post_recv failed with %d\n", rc
);
1245 isert_handle_nop_out(struct isert_conn
*isert_conn
, struct isert_cmd
*isert_cmd
,
1246 struct iscsi_cmd
*cmd
, struct iser_rx_desc
*rx_desc
,
1249 struct iscsi_conn
*conn
= isert_conn
->conn
;
1250 struct iscsi_nopout
*hdr
= (struct iscsi_nopout
*)buf
;
1253 rc
= iscsit_setup_nop_out(conn
, cmd
, hdr
);
1257 * FIXME: Add support for NOPOUT payload using unsolicited RDMA payload
1260 return iscsit_process_nop_out(conn
, cmd
, hdr
);
1264 isert_handle_text_cmd(struct isert_conn
*isert_conn
, struct isert_cmd
*isert_cmd
,
1265 struct iscsi_cmd
*cmd
, struct iser_rx_desc
*rx_desc
,
1266 struct iscsi_text
*hdr
)
1268 struct iscsi_conn
*conn
= isert_conn
->conn
;
1269 u32 payload_length
= ntoh24(hdr
->dlength
);
1271 unsigned char *text_in
= NULL
;
1273 rc
= iscsit_setup_text_cmd(conn
, cmd
, hdr
);
1277 if (payload_length
) {
1278 text_in
= kzalloc(payload_length
, GFP_KERNEL
);
1280 isert_err("Unable to allocate text_in of payload_length: %u\n",
1285 cmd
->text_in_ptr
= text_in
;
1287 memcpy(cmd
->text_in_ptr
, &rx_desc
->data
[0], payload_length
);
1289 return iscsit_process_text_cmd(conn
, cmd
, hdr
);
1293 isert_rx_opcode(struct isert_conn
*isert_conn
, struct iser_rx_desc
*rx_desc
,
1294 uint32_t read_stag
, uint64_t read_va
,
1295 uint32_t write_stag
, uint64_t write_va
)
1297 struct iscsi_hdr
*hdr
= &rx_desc
->iscsi_header
;
1298 struct iscsi_conn
*conn
= isert_conn
->conn
;
1299 struct iscsi_cmd
*cmd
;
1300 struct isert_cmd
*isert_cmd
;
1302 u8 opcode
= (hdr
->opcode
& ISCSI_OPCODE_MASK
);
1304 if (conn
->sess
->sess_ops
->SessionType
&&
1305 (!(opcode
& ISCSI_OP_TEXT
) || !(opcode
& ISCSI_OP_LOGOUT
))) {
1306 isert_err("Got illegal opcode: 0x%02x in SessionType=Discovery,"
1307 " ignoring\n", opcode
);
1312 case ISCSI_OP_SCSI_CMD
:
1313 cmd
= isert_allocate_cmd(conn
, rx_desc
);
1317 isert_cmd
= iscsit_priv_cmd(cmd
);
1318 isert_cmd
->read_stag
= read_stag
;
1319 isert_cmd
->read_va
= read_va
;
1320 isert_cmd
->write_stag
= write_stag
;
1321 isert_cmd
->write_va
= write_va
;
1322 isert_cmd
->inv_rkey
= read_stag
? read_stag
: write_stag
;
1324 ret
= isert_handle_scsi_cmd(isert_conn
, isert_cmd
, cmd
,
1325 rx_desc
, (unsigned char *)hdr
);
1327 case ISCSI_OP_NOOP_OUT
:
1328 cmd
= isert_allocate_cmd(conn
, rx_desc
);
1332 isert_cmd
= iscsit_priv_cmd(cmd
);
1333 ret
= isert_handle_nop_out(isert_conn
, isert_cmd
, cmd
,
1334 rx_desc
, (unsigned char *)hdr
);
1336 case ISCSI_OP_SCSI_DATA_OUT
:
1337 ret
= isert_handle_iscsi_dataout(isert_conn
, rx_desc
,
1338 (unsigned char *)hdr
);
1340 case ISCSI_OP_SCSI_TMFUNC
:
1341 cmd
= isert_allocate_cmd(conn
, rx_desc
);
1345 ret
= iscsit_handle_task_mgt_cmd(conn
, cmd
,
1346 (unsigned char *)hdr
);
1348 case ISCSI_OP_LOGOUT
:
1349 cmd
= isert_allocate_cmd(conn
, rx_desc
);
1353 ret
= iscsit_handle_logout_cmd(conn
, cmd
, (unsigned char *)hdr
);
1356 if (be32_to_cpu(hdr
->ttt
) != 0xFFFFFFFF)
1357 cmd
= iscsit_find_cmd_from_itt(conn
, hdr
->itt
);
1359 cmd
= isert_allocate_cmd(conn
, rx_desc
);
1364 isert_cmd
= iscsit_priv_cmd(cmd
);
1365 ret
= isert_handle_text_cmd(isert_conn
, isert_cmd
, cmd
,
1366 rx_desc
, (struct iscsi_text
*)hdr
);
1369 isert_err("Got unknown iSCSI OpCode: 0x%02x\n", opcode
);
1378 isert_print_wc(struct ib_wc
*wc
, const char *type
)
1380 if (wc
->status
!= IB_WC_WR_FLUSH_ERR
)
1381 isert_err("%s failure: %s (%d) vend_err %x\n", type
,
1382 ib_wc_status_msg(wc
->status
), wc
->status
,
1385 isert_dbg("%s failure: %s (%d)\n", type
,
1386 ib_wc_status_msg(wc
->status
), wc
->status
);
1390 isert_recv_done(struct ib_cq
*cq
, struct ib_wc
*wc
)
1392 struct isert_conn
*isert_conn
= wc
->qp
->qp_context
;
1393 struct ib_device
*ib_dev
= isert_conn
->cm_id
->device
;
1394 struct iser_rx_desc
*rx_desc
= cqe_to_rx_desc(wc
->wr_cqe
);
1395 struct iscsi_hdr
*hdr
= &rx_desc
->iscsi_header
;
1396 struct iser_ctrl
*iser_ctrl
= &rx_desc
->iser_header
;
1397 uint64_t read_va
= 0, write_va
= 0;
1398 uint32_t read_stag
= 0, write_stag
= 0;
1400 if (unlikely(wc
->status
!= IB_WC_SUCCESS
)) {
1401 isert_print_wc(wc
, "recv");
1402 if (wc
->status
!= IB_WC_WR_FLUSH_ERR
)
1403 iscsit_cause_connection_reinstatement(isert_conn
->conn
, 0);
1407 ib_dma_sync_single_for_cpu(ib_dev
, rx_desc
->dma_addr
,
1408 ISER_RX_PAYLOAD_SIZE
, DMA_FROM_DEVICE
);
1410 isert_dbg("DMA: 0x%llx, iSCSI opcode: 0x%02x, ITT: 0x%08x, flags: 0x%02x dlen: %d\n",
1411 rx_desc
->dma_addr
, hdr
->opcode
, hdr
->itt
, hdr
->flags
,
1412 (int)(wc
->byte_len
- ISER_HEADERS_LEN
));
1414 switch (iser_ctrl
->flags
& 0xF0) {
1416 if (iser_ctrl
->flags
& ISER_RSV
) {
1417 read_stag
= be32_to_cpu(iser_ctrl
->read_stag
);
1418 read_va
= be64_to_cpu(iser_ctrl
->read_va
);
1419 isert_dbg("ISER_RSV: read_stag: 0x%x read_va: 0x%llx\n",
1420 read_stag
, (unsigned long long)read_va
);
1422 if (iser_ctrl
->flags
& ISER_WSV
) {
1423 write_stag
= be32_to_cpu(iser_ctrl
->write_stag
);
1424 write_va
= be64_to_cpu(iser_ctrl
->write_va
);
1425 isert_dbg("ISER_WSV: write_stag: 0x%x write_va: 0x%llx\n",
1426 write_stag
, (unsigned long long)write_va
);
1429 isert_dbg("ISER ISCSI_CTRL PDU\n");
1432 isert_err("iSER Hello message\n");
1435 isert_warn("Unknown iSER hdr flags: 0x%02x\n", iser_ctrl
->flags
);
1439 isert_rx_opcode(isert_conn
, rx_desc
,
1440 read_stag
, read_va
, write_stag
, write_va
);
1442 ib_dma_sync_single_for_device(ib_dev
, rx_desc
->dma_addr
,
1443 ISER_RX_PAYLOAD_SIZE
, DMA_FROM_DEVICE
);
1447 isert_login_recv_done(struct ib_cq
*cq
, struct ib_wc
*wc
)
1449 struct isert_conn
*isert_conn
= wc
->qp
->qp_context
;
1450 struct ib_device
*ib_dev
= isert_conn
->cm_id
->device
;
1452 if (unlikely(wc
->status
!= IB_WC_SUCCESS
)) {
1453 isert_print_wc(wc
, "login recv");
1457 ib_dma_sync_single_for_cpu(ib_dev
, isert_conn
->login_req_dma
,
1458 ISER_RX_PAYLOAD_SIZE
, DMA_FROM_DEVICE
);
1460 isert_conn
->login_req_len
= wc
->byte_len
- ISER_HEADERS_LEN
;
1462 if (isert_conn
->conn
) {
1463 struct iscsi_login
*login
= isert_conn
->conn
->conn_login
;
1465 if (login
&& !login
->first_request
)
1466 isert_rx_login_req(isert_conn
);
1469 mutex_lock(&isert_conn
->mutex
);
1470 complete(&isert_conn
->login_req_comp
);
1471 mutex_unlock(&isert_conn
->mutex
);
1473 ib_dma_sync_single_for_device(ib_dev
, isert_conn
->login_req_dma
,
1474 ISER_RX_PAYLOAD_SIZE
, DMA_FROM_DEVICE
);
1478 isert_rdma_rw_ctx_destroy(struct isert_cmd
*cmd
, struct isert_conn
*conn
)
1480 struct se_cmd
*se_cmd
= &cmd
->iscsi_cmd
->se_cmd
;
1481 enum dma_data_direction dir
= target_reverse_dma_direction(se_cmd
);
1483 if (!cmd
->rw
.nr_ops
)
1486 if (isert_prot_cmd(conn
, se_cmd
)) {
1487 rdma_rw_ctx_destroy_signature(&cmd
->rw
, conn
->qp
,
1488 conn
->cm_id
->port_num
, se_cmd
->t_data_sg
,
1489 se_cmd
->t_data_nents
, se_cmd
->t_prot_sg
,
1490 se_cmd
->t_prot_nents
, dir
);
1492 rdma_rw_ctx_destroy(&cmd
->rw
, conn
->qp
, conn
->cm_id
->port_num
,
1493 se_cmd
->t_data_sg
, se_cmd
->t_data_nents
, dir
);
1500 isert_put_cmd(struct isert_cmd
*isert_cmd
, bool comp_err
)
1502 struct iscsi_cmd
*cmd
= isert_cmd
->iscsi_cmd
;
1503 struct isert_conn
*isert_conn
= isert_cmd
->conn
;
1504 struct iscsi_conn
*conn
= isert_conn
->conn
;
1505 struct iscsi_text_rsp
*hdr
;
1507 isert_dbg("Cmd %p\n", isert_cmd
);
1509 switch (cmd
->iscsi_opcode
) {
1510 case ISCSI_OP_SCSI_CMD
:
1511 spin_lock_bh(&conn
->cmd_lock
);
1512 if (!list_empty(&cmd
->i_conn_node
))
1513 list_del_init(&cmd
->i_conn_node
);
1514 spin_unlock_bh(&conn
->cmd_lock
);
1516 if (cmd
->data_direction
== DMA_TO_DEVICE
) {
1517 iscsit_stop_dataout_timer(cmd
);
1519 * Check for special case during comp_err where
1520 * WRITE_PENDING has been handed off from core,
1521 * but requires an extra target_put_sess_cmd()
1522 * before transport_generic_free_cmd() below.
1525 cmd
->se_cmd
.t_state
== TRANSPORT_WRITE_PENDING
) {
1526 struct se_cmd
*se_cmd
= &cmd
->se_cmd
;
1528 target_put_sess_cmd(se_cmd
);
1532 isert_rdma_rw_ctx_destroy(isert_cmd
, isert_conn
);
1533 transport_generic_free_cmd(&cmd
->se_cmd
, 0);
1535 case ISCSI_OP_SCSI_TMFUNC
:
1536 spin_lock_bh(&conn
->cmd_lock
);
1537 if (!list_empty(&cmd
->i_conn_node
))
1538 list_del_init(&cmd
->i_conn_node
);
1539 spin_unlock_bh(&conn
->cmd_lock
);
1541 transport_generic_free_cmd(&cmd
->se_cmd
, 0);
1543 case ISCSI_OP_REJECT
:
1544 case ISCSI_OP_NOOP_OUT
:
1546 hdr
= (struct iscsi_text_rsp
*)&isert_cmd
->tx_desc
.iscsi_header
;
1547 /* If the continue bit is on, keep the command alive */
1548 if (hdr
->flags
& ISCSI_FLAG_TEXT_CONTINUE
)
1551 spin_lock_bh(&conn
->cmd_lock
);
1552 if (!list_empty(&cmd
->i_conn_node
))
1553 list_del_init(&cmd
->i_conn_node
);
1554 spin_unlock_bh(&conn
->cmd_lock
);
1557 * Handle special case for REJECT when iscsi_add_reject*() has
1558 * overwritten the original iscsi_opcode assignment, and the
1559 * associated cmd->se_cmd needs to be released.
1561 if (cmd
->se_cmd
.se_tfo
!= NULL
) {
1562 isert_dbg("Calling transport_generic_free_cmd for 0x%02x\n",
1564 transport_generic_free_cmd(&cmd
->se_cmd
, 0);
1571 iscsit_release_cmd(cmd
);
1577 isert_unmap_tx_desc(struct iser_tx_desc
*tx_desc
, struct ib_device
*ib_dev
)
1579 if (tx_desc
->dma_addr
!= 0) {
1580 isert_dbg("unmap single for tx_desc->dma_addr\n");
1581 ib_dma_unmap_single(ib_dev
, tx_desc
->dma_addr
,
1582 ISER_HEADERS_LEN
, DMA_TO_DEVICE
);
1583 tx_desc
->dma_addr
= 0;
1588 isert_completion_put(struct iser_tx_desc
*tx_desc
, struct isert_cmd
*isert_cmd
,
1589 struct ib_device
*ib_dev
, bool comp_err
)
1591 if (isert_cmd
->pdu_buf_dma
!= 0) {
1592 isert_dbg("unmap single for isert_cmd->pdu_buf_dma\n");
1593 ib_dma_unmap_single(ib_dev
, isert_cmd
->pdu_buf_dma
,
1594 isert_cmd
->pdu_buf_len
, DMA_TO_DEVICE
);
1595 isert_cmd
->pdu_buf_dma
= 0;
1598 isert_unmap_tx_desc(tx_desc
, ib_dev
);
1599 isert_put_cmd(isert_cmd
, comp_err
);
1603 isert_check_pi_status(struct se_cmd
*se_cmd
, struct ib_mr
*sig_mr
)
1605 struct ib_mr_status mr_status
;
1608 ret
= ib_check_mr_status(sig_mr
, IB_MR_CHECK_SIG_STATUS
, &mr_status
);
1610 isert_err("ib_check_mr_status failed, ret %d\n", ret
);
1611 goto fail_mr_status
;
1614 if (mr_status
.fail_status
& IB_MR_CHECK_SIG_STATUS
) {
1616 u32 block_size
= se_cmd
->se_dev
->dev_attrib
.block_size
+ 8;
1618 switch (mr_status
.sig_err
.err_type
) {
1619 case IB_SIG_BAD_GUARD
:
1620 se_cmd
->pi_err
= TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED
;
1622 case IB_SIG_BAD_REFTAG
:
1623 se_cmd
->pi_err
= TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED
;
1625 case IB_SIG_BAD_APPTAG
:
1626 se_cmd
->pi_err
= TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED
;
1629 sec_offset_err
= mr_status
.sig_err
.sig_err_offset
;
1630 do_div(sec_offset_err
, block_size
);
1631 se_cmd
->bad_sector
= sec_offset_err
+ se_cmd
->t_task_lba
;
1633 isert_err("PI error found type %d at sector 0x%llx "
1634 "expected 0x%x vs actual 0x%x\n",
1635 mr_status
.sig_err
.err_type
,
1636 (unsigned long long)se_cmd
->bad_sector
,
1637 mr_status
.sig_err
.expected
,
1638 mr_status
.sig_err
.actual
);
1647 isert_rdma_write_done(struct ib_cq
*cq
, struct ib_wc
*wc
)
1649 struct isert_conn
*isert_conn
= wc
->qp
->qp_context
;
1650 struct isert_device
*device
= isert_conn
->device
;
1651 struct iser_tx_desc
*desc
= cqe_to_tx_desc(wc
->wr_cqe
);
1652 struct isert_cmd
*isert_cmd
= tx_desc_to_cmd(desc
);
1653 struct se_cmd
*cmd
= &isert_cmd
->iscsi_cmd
->se_cmd
;
1656 if (unlikely(wc
->status
!= IB_WC_SUCCESS
)) {
1657 isert_print_wc(wc
, "rdma write");
1658 if (wc
->status
!= IB_WC_WR_FLUSH_ERR
)
1659 iscsit_cause_connection_reinstatement(isert_conn
->conn
, 0);
1660 isert_completion_put(desc
, isert_cmd
, device
->ib_device
, true);
1664 isert_dbg("Cmd %p\n", isert_cmd
);
1666 ret
= isert_check_pi_status(cmd
, isert_cmd
->rw
.sig
->sig_mr
);
1667 isert_rdma_rw_ctx_destroy(isert_cmd
, isert_conn
);
1670 transport_send_check_condition_and_sense(cmd
, cmd
->pi_err
, 0);
1672 isert_put_response(isert_conn
->conn
, isert_cmd
->iscsi_cmd
);
1676 isert_rdma_read_done(struct ib_cq
*cq
, struct ib_wc
*wc
)
1678 struct isert_conn
*isert_conn
= wc
->qp
->qp_context
;
1679 struct isert_device
*device
= isert_conn
->device
;
1680 struct iser_tx_desc
*desc
= cqe_to_tx_desc(wc
->wr_cqe
);
1681 struct isert_cmd
*isert_cmd
= tx_desc_to_cmd(desc
);
1682 struct iscsi_cmd
*cmd
= isert_cmd
->iscsi_cmd
;
1683 struct se_cmd
*se_cmd
= &cmd
->se_cmd
;
1686 if (unlikely(wc
->status
!= IB_WC_SUCCESS
)) {
1687 isert_print_wc(wc
, "rdma read");
1688 if (wc
->status
!= IB_WC_WR_FLUSH_ERR
)
1689 iscsit_cause_connection_reinstatement(isert_conn
->conn
, 0);
1690 isert_completion_put(desc
, isert_cmd
, device
->ib_device
, true);
1694 isert_dbg("Cmd %p\n", isert_cmd
);
1696 iscsit_stop_dataout_timer(cmd
);
1698 if (isert_prot_cmd(isert_conn
, se_cmd
))
1699 ret
= isert_check_pi_status(se_cmd
, isert_cmd
->rw
.sig
->sig_mr
);
1700 isert_rdma_rw_ctx_destroy(isert_cmd
, isert_conn
);
1701 cmd
->write_data_done
= 0;
1703 isert_dbg("Cmd: %p RDMA_READ comp calling execute_cmd\n", isert_cmd
);
1704 spin_lock_bh(&cmd
->istate_lock
);
1705 cmd
->cmd_flags
|= ICF_GOT_LAST_DATAOUT
;
1706 cmd
->i_state
= ISTATE_RECEIVED_LAST_DATAOUT
;
1707 spin_unlock_bh(&cmd
->istate_lock
);
1710 target_put_sess_cmd(se_cmd
);
1711 transport_send_check_condition_and_sense(se_cmd
,
1714 target_execute_cmd(se_cmd
);
1719 isert_do_control_comp(struct work_struct
*work
)
1721 struct isert_cmd
*isert_cmd
= container_of(work
,
1722 struct isert_cmd
, comp_work
);
1723 struct isert_conn
*isert_conn
= isert_cmd
->conn
;
1724 struct ib_device
*ib_dev
= isert_conn
->cm_id
->device
;
1725 struct iscsi_cmd
*cmd
= isert_cmd
->iscsi_cmd
;
1727 isert_dbg("Cmd %p i_state %d\n", isert_cmd
, cmd
->i_state
);
1729 switch (cmd
->i_state
) {
1730 case ISTATE_SEND_TASKMGTRSP
:
1731 iscsit_tmr_post_handler(cmd
, cmd
->conn
);
1732 case ISTATE_SEND_REJECT
: /* FALLTHRU */
1733 case ISTATE_SEND_TEXTRSP
: /* FALLTHRU */
1734 cmd
->i_state
= ISTATE_SENT_STATUS
;
1735 isert_completion_put(&isert_cmd
->tx_desc
, isert_cmd
,
1738 case ISTATE_SEND_LOGOUTRSP
:
1739 iscsit_logout_post_handler(cmd
, cmd
->conn
);
1742 isert_err("Unknown i_state %d\n", cmd
->i_state
);
1749 isert_login_send_done(struct ib_cq
*cq
, struct ib_wc
*wc
)
1751 struct isert_conn
*isert_conn
= wc
->qp
->qp_context
;
1752 struct ib_device
*ib_dev
= isert_conn
->cm_id
->device
;
1753 struct iser_tx_desc
*tx_desc
= cqe_to_tx_desc(wc
->wr_cqe
);
1755 if (unlikely(wc
->status
!= IB_WC_SUCCESS
)) {
1756 isert_print_wc(wc
, "login send");
1757 if (wc
->status
!= IB_WC_WR_FLUSH_ERR
)
1758 iscsit_cause_connection_reinstatement(isert_conn
->conn
, 0);
1761 isert_unmap_tx_desc(tx_desc
, ib_dev
);
1765 isert_send_done(struct ib_cq
*cq
, struct ib_wc
*wc
)
1767 struct isert_conn
*isert_conn
= wc
->qp
->qp_context
;
1768 struct ib_device
*ib_dev
= isert_conn
->cm_id
->device
;
1769 struct iser_tx_desc
*tx_desc
= cqe_to_tx_desc(wc
->wr_cqe
);
1770 struct isert_cmd
*isert_cmd
= tx_desc_to_cmd(tx_desc
);
1772 if (unlikely(wc
->status
!= IB_WC_SUCCESS
)) {
1773 isert_print_wc(wc
, "send");
1774 if (wc
->status
!= IB_WC_WR_FLUSH_ERR
)
1775 iscsit_cause_connection_reinstatement(isert_conn
->conn
, 0);
1776 isert_completion_put(tx_desc
, isert_cmd
, ib_dev
, true);
1780 isert_dbg("Cmd %p\n", isert_cmd
);
1782 switch (isert_cmd
->iscsi_cmd
->i_state
) {
1783 case ISTATE_SEND_TASKMGTRSP
:
1784 case ISTATE_SEND_LOGOUTRSP
:
1785 case ISTATE_SEND_REJECT
:
1786 case ISTATE_SEND_TEXTRSP
:
1787 isert_unmap_tx_desc(tx_desc
, ib_dev
);
1789 INIT_WORK(&isert_cmd
->comp_work
, isert_do_control_comp
);
1790 queue_work(isert_comp_wq
, &isert_cmd
->comp_work
);
1793 isert_cmd
->iscsi_cmd
->i_state
= ISTATE_SENT_STATUS
;
1794 isert_completion_put(tx_desc
, isert_cmd
, ib_dev
, false);
1800 isert_post_response(struct isert_conn
*isert_conn
, struct isert_cmd
*isert_cmd
)
1802 struct ib_send_wr
*wr_failed
;
1805 ret
= isert_post_recv(isert_conn
, isert_cmd
->rx_desc
);
1807 isert_err("ib_post_recv failed with %d\n", ret
);
1811 ret
= ib_post_send(isert_conn
->qp
, &isert_cmd
->tx_desc
.send_wr
,
1814 isert_err("ib_post_send failed with %d\n", ret
);
1821 isert_put_response(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
)
1823 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
1824 struct isert_conn
*isert_conn
= conn
->context
;
1825 struct ib_send_wr
*send_wr
= &isert_cmd
->tx_desc
.send_wr
;
1826 struct iscsi_scsi_rsp
*hdr
= (struct iscsi_scsi_rsp
*)
1827 &isert_cmd
->tx_desc
.iscsi_header
;
1829 isert_create_send_desc(isert_conn
, isert_cmd
, &isert_cmd
->tx_desc
);
1830 iscsit_build_rsp_pdu(cmd
, conn
, true, hdr
);
1831 isert_init_tx_hdrs(isert_conn
, &isert_cmd
->tx_desc
);
1833 * Attach SENSE DATA payload to iSCSI Response PDU
1835 if (cmd
->se_cmd
.sense_buffer
&&
1836 ((cmd
->se_cmd
.se_cmd_flags
& SCF_TRANSPORT_TASK_SENSE
) ||
1837 (cmd
->se_cmd
.se_cmd_flags
& SCF_EMULATED_TASK_SENSE
))) {
1838 struct isert_device
*device
= isert_conn
->device
;
1839 struct ib_device
*ib_dev
= device
->ib_device
;
1840 struct ib_sge
*tx_dsg
= &isert_cmd
->tx_desc
.tx_sg
[1];
1841 u32 padding
, pdu_len
;
1843 put_unaligned_be16(cmd
->se_cmd
.scsi_sense_length
,
1845 cmd
->se_cmd
.scsi_sense_length
+= sizeof(__be16
);
1847 padding
= -(cmd
->se_cmd
.scsi_sense_length
) & 3;
1848 hton24(hdr
->dlength
, (u32
)cmd
->se_cmd
.scsi_sense_length
);
1849 pdu_len
= cmd
->se_cmd
.scsi_sense_length
+ padding
;
1851 isert_cmd
->pdu_buf_dma
= ib_dma_map_single(ib_dev
,
1852 (void *)cmd
->sense_buffer
, pdu_len
,
1855 isert_cmd
->pdu_buf_len
= pdu_len
;
1856 tx_dsg
->addr
= isert_cmd
->pdu_buf_dma
;
1857 tx_dsg
->length
= pdu_len
;
1858 tx_dsg
->lkey
= device
->pd
->local_dma_lkey
;
1859 isert_cmd
->tx_desc
.num_sge
= 2;
1862 isert_init_send_wr(isert_conn
, isert_cmd
, send_wr
);
1864 isert_dbg("Posting SCSI Response\n");
1866 return isert_post_response(isert_conn
, isert_cmd
);
1870 isert_aborted_task(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
)
1872 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
1873 struct isert_conn
*isert_conn
= conn
->context
;
1875 spin_lock_bh(&conn
->cmd_lock
);
1876 if (!list_empty(&cmd
->i_conn_node
))
1877 list_del_init(&cmd
->i_conn_node
);
1878 spin_unlock_bh(&conn
->cmd_lock
);
1880 if (cmd
->data_direction
== DMA_TO_DEVICE
)
1881 iscsit_stop_dataout_timer(cmd
);
1882 isert_rdma_rw_ctx_destroy(isert_cmd
, isert_conn
);
1885 static enum target_prot_op
1886 isert_get_sup_prot_ops(struct iscsi_conn
*conn
)
1888 struct isert_conn
*isert_conn
= conn
->context
;
1889 struct isert_device
*device
= isert_conn
->device
;
1891 if (conn
->tpg
->tpg_attrib
.t10_pi
) {
1892 if (device
->pi_capable
) {
1893 isert_info("conn %p PI offload enabled\n", isert_conn
);
1894 isert_conn
->pi_support
= true;
1895 return TARGET_PROT_ALL
;
1899 isert_info("conn %p PI offload disabled\n", isert_conn
);
1900 isert_conn
->pi_support
= false;
1902 return TARGET_PROT_NORMAL
;
1906 isert_put_nopin(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
,
1907 bool nopout_response
)
1909 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
1910 struct isert_conn
*isert_conn
= conn
->context
;
1911 struct ib_send_wr
*send_wr
= &isert_cmd
->tx_desc
.send_wr
;
1913 isert_create_send_desc(isert_conn
, isert_cmd
, &isert_cmd
->tx_desc
);
1914 iscsit_build_nopin_rsp(cmd
, conn
, (struct iscsi_nopin
*)
1915 &isert_cmd
->tx_desc
.iscsi_header
,
1917 isert_init_tx_hdrs(isert_conn
, &isert_cmd
->tx_desc
);
1918 isert_init_send_wr(isert_conn
, isert_cmd
, send_wr
);
1920 isert_dbg("conn %p Posting NOPIN Response\n", isert_conn
);
1922 return isert_post_response(isert_conn
, isert_cmd
);
1926 isert_put_logout_rsp(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
1928 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
1929 struct isert_conn
*isert_conn
= conn
->context
;
1930 struct ib_send_wr
*send_wr
= &isert_cmd
->tx_desc
.send_wr
;
1932 isert_create_send_desc(isert_conn
, isert_cmd
, &isert_cmd
->tx_desc
);
1933 iscsit_build_logout_rsp(cmd
, conn
, (struct iscsi_logout_rsp
*)
1934 &isert_cmd
->tx_desc
.iscsi_header
);
1935 isert_init_tx_hdrs(isert_conn
, &isert_cmd
->tx_desc
);
1936 isert_init_send_wr(isert_conn
, isert_cmd
, send_wr
);
1938 isert_dbg("conn %p Posting Logout Response\n", isert_conn
);
1940 return isert_post_response(isert_conn
, isert_cmd
);
1944 isert_put_tm_rsp(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
1946 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
1947 struct isert_conn
*isert_conn
= conn
->context
;
1948 struct ib_send_wr
*send_wr
= &isert_cmd
->tx_desc
.send_wr
;
1950 isert_create_send_desc(isert_conn
, isert_cmd
, &isert_cmd
->tx_desc
);
1951 iscsit_build_task_mgt_rsp(cmd
, conn
, (struct iscsi_tm_rsp
*)
1952 &isert_cmd
->tx_desc
.iscsi_header
);
1953 isert_init_tx_hdrs(isert_conn
, &isert_cmd
->tx_desc
);
1954 isert_init_send_wr(isert_conn
, isert_cmd
, send_wr
);
1956 isert_dbg("conn %p Posting Task Management Response\n", isert_conn
);
1958 return isert_post_response(isert_conn
, isert_cmd
);
1962 isert_put_reject(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
1964 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
1965 struct isert_conn
*isert_conn
= conn
->context
;
1966 struct ib_send_wr
*send_wr
= &isert_cmd
->tx_desc
.send_wr
;
1967 struct isert_device
*device
= isert_conn
->device
;
1968 struct ib_device
*ib_dev
= device
->ib_device
;
1969 struct ib_sge
*tx_dsg
= &isert_cmd
->tx_desc
.tx_sg
[1];
1970 struct iscsi_reject
*hdr
=
1971 (struct iscsi_reject
*)&isert_cmd
->tx_desc
.iscsi_header
;
1973 isert_create_send_desc(isert_conn
, isert_cmd
, &isert_cmd
->tx_desc
);
1974 iscsit_build_reject(cmd
, conn
, hdr
);
1975 isert_init_tx_hdrs(isert_conn
, &isert_cmd
->tx_desc
);
1977 hton24(hdr
->dlength
, ISCSI_HDR_LEN
);
1978 isert_cmd
->pdu_buf_dma
= ib_dma_map_single(ib_dev
,
1979 (void *)cmd
->buf_ptr
, ISCSI_HDR_LEN
,
1981 isert_cmd
->pdu_buf_len
= ISCSI_HDR_LEN
;
1982 tx_dsg
->addr
= isert_cmd
->pdu_buf_dma
;
1983 tx_dsg
->length
= ISCSI_HDR_LEN
;
1984 tx_dsg
->lkey
= device
->pd
->local_dma_lkey
;
1985 isert_cmd
->tx_desc
.num_sge
= 2;
1987 isert_init_send_wr(isert_conn
, isert_cmd
, send_wr
);
1989 isert_dbg("conn %p Posting Reject\n", isert_conn
);
1991 return isert_post_response(isert_conn
, isert_cmd
);
1995 isert_put_text_rsp(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
1997 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
1998 struct isert_conn
*isert_conn
= conn
->context
;
1999 struct ib_send_wr
*send_wr
= &isert_cmd
->tx_desc
.send_wr
;
2000 struct iscsi_text_rsp
*hdr
=
2001 (struct iscsi_text_rsp
*)&isert_cmd
->tx_desc
.iscsi_header
;
2005 isert_create_send_desc(isert_conn
, isert_cmd
, &isert_cmd
->tx_desc
);
2006 rc
= iscsit_build_text_rsp(cmd
, conn
, hdr
, ISCSI_INFINIBAND
);
2011 isert_init_tx_hdrs(isert_conn
, &isert_cmd
->tx_desc
);
2014 struct isert_device
*device
= isert_conn
->device
;
2015 struct ib_device
*ib_dev
= device
->ib_device
;
2016 struct ib_sge
*tx_dsg
= &isert_cmd
->tx_desc
.tx_sg
[1];
2017 void *txt_rsp_buf
= cmd
->buf_ptr
;
2019 isert_cmd
->pdu_buf_dma
= ib_dma_map_single(ib_dev
,
2020 txt_rsp_buf
, txt_rsp_len
, DMA_TO_DEVICE
);
2022 isert_cmd
->pdu_buf_len
= txt_rsp_len
;
2023 tx_dsg
->addr
= isert_cmd
->pdu_buf_dma
;
2024 tx_dsg
->length
= txt_rsp_len
;
2025 tx_dsg
->lkey
= device
->pd
->local_dma_lkey
;
2026 isert_cmd
->tx_desc
.num_sge
= 2;
2028 isert_init_send_wr(isert_conn
, isert_cmd
, send_wr
);
2030 isert_dbg("conn %p Text Response\n", isert_conn
);
2032 return isert_post_response(isert_conn
, isert_cmd
);
2036 isert_set_dif_domain(struct se_cmd
*se_cmd
, struct ib_sig_attrs
*sig_attrs
,
2037 struct ib_sig_domain
*domain
)
2039 domain
->sig_type
= IB_SIG_TYPE_T10_DIF
;
2040 domain
->sig
.dif
.bg_type
= IB_T10DIF_CRC
;
2041 domain
->sig
.dif
.pi_interval
= se_cmd
->se_dev
->dev_attrib
.block_size
;
2042 domain
->sig
.dif
.ref_tag
= se_cmd
->reftag_seed
;
2044 * At the moment we hard code those, but if in the future
2045 * the target core would like to use it, we will take it
2048 domain
->sig
.dif
.apptag_check_mask
= 0xffff;
2049 domain
->sig
.dif
.app_escape
= true;
2050 domain
->sig
.dif
.ref_escape
= true;
2051 if (se_cmd
->prot_type
== TARGET_DIF_TYPE1_PROT
||
2052 se_cmd
->prot_type
== TARGET_DIF_TYPE2_PROT
)
2053 domain
->sig
.dif
.ref_remap
= true;
2057 isert_set_sig_attrs(struct se_cmd
*se_cmd
, struct ib_sig_attrs
*sig_attrs
)
2059 memset(sig_attrs
, 0, sizeof(*sig_attrs
));
2061 switch (se_cmd
->prot_op
) {
2062 case TARGET_PROT_DIN_INSERT
:
2063 case TARGET_PROT_DOUT_STRIP
:
2064 sig_attrs
->mem
.sig_type
= IB_SIG_TYPE_NONE
;
2065 isert_set_dif_domain(se_cmd
, sig_attrs
, &sig_attrs
->wire
);
2067 case TARGET_PROT_DOUT_INSERT
:
2068 case TARGET_PROT_DIN_STRIP
:
2069 sig_attrs
->wire
.sig_type
= IB_SIG_TYPE_NONE
;
2070 isert_set_dif_domain(se_cmd
, sig_attrs
, &sig_attrs
->mem
);
2072 case TARGET_PROT_DIN_PASS
:
2073 case TARGET_PROT_DOUT_PASS
:
2074 isert_set_dif_domain(se_cmd
, sig_attrs
, &sig_attrs
->wire
);
2075 isert_set_dif_domain(se_cmd
, sig_attrs
, &sig_attrs
->mem
);
2078 isert_err("Unsupported PI operation %d\n", se_cmd
->prot_op
);
2082 sig_attrs
->check_mask
=
2083 (se_cmd
->prot_checks
& TARGET_DIF_CHECK_GUARD
? 0xc0 : 0) |
2084 (se_cmd
->prot_checks
& TARGET_DIF_CHECK_REFTAG
? 0x30 : 0) |
2085 (se_cmd
->prot_checks
& TARGET_DIF_CHECK_REFTAG
? 0x0f : 0);
2090 isert_rdma_rw_ctx_post(struct isert_cmd
*cmd
, struct isert_conn
*conn
,
2091 struct ib_cqe
*cqe
, struct ib_send_wr
*chain_wr
)
2093 struct se_cmd
*se_cmd
= &cmd
->iscsi_cmd
->se_cmd
;
2094 enum dma_data_direction dir
= target_reverse_dma_direction(se_cmd
);
2095 u8 port_num
= conn
->cm_id
->port_num
;
2100 if (dir
== DMA_FROM_DEVICE
) {
2101 addr
= cmd
->write_va
;
2102 rkey
= cmd
->write_stag
;
2103 offset
= cmd
->iscsi_cmd
->write_data_done
;
2105 addr
= cmd
->read_va
;
2106 rkey
= cmd
->read_stag
;
2110 if (isert_prot_cmd(conn
, se_cmd
)) {
2111 struct ib_sig_attrs sig_attrs
;
2113 ret
= isert_set_sig_attrs(se_cmd
, &sig_attrs
);
2117 WARN_ON_ONCE(offset
);
2118 ret
= rdma_rw_ctx_signature_init(&cmd
->rw
, conn
->qp
, port_num
,
2119 se_cmd
->t_data_sg
, se_cmd
->t_data_nents
,
2120 se_cmd
->t_prot_sg
, se_cmd
->t_prot_nents
,
2121 &sig_attrs
, addr
, rkey
, dir
);
2123 ret
= rdma_rw_ctx_init(&cmd
->rw
, conn
->qp
, port_num
,
2124 se_cmd
->t_data_sg
, se_cmd
->t_data_nents
,
2125 offset
, addr
, rkey
, dir
);
2128 isert_err("Cmd: %p failed to prepare RDMA res\n", cmd
);
2132 ret
= rdma_rw_ctx_post(&cmd
->rw
, conn
->qp
, port_num
, cqe
, chain_wr
);
2134 isert_err("Cmd: %p failed to post RDMA res\n", cmd
);
2139 isert_put_datain(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
)
2141 struct se_cmd
*se_cmd
= &cmd
->se_cmd
;
2142 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
2143 struct isert_conn
*isert_conn
= conn
->context
;
2144 struct ib_cqe
*cqe
= NULL
;
2145 struct ib_send_wr
*chain_wr
= NULL
;
2148 isert_dbg("Cmd: %p RDMA_WRITE data_length: %u\n",
2149 isert_cmd
, se_cmd
->data_length
);
2151 if (isert_prot_cmd(isert_conn
, se_cmd
)) {
2152 isert_cmd
->tx_desc
.tx_cqe
.done
= isert_rdma_write_done
;
2153 cqe
= &isert_cmd
->tx_desc
.tx_cqe
;
2156 * Build isert_conn->tx_desc for iSCSI response PDU and attach
2158 isert_create_send_desc(isert_conn
, isert_cmd
,
2159 &isert_cmd
->tx_desc
);
2160 iscsit_build_rsp_pdu(cmd
, conn
, true, (struct iscsi_scsi_rsp
*)
2161 &isert_cmd
->tx_desc
.iscsi_header
);
2162 isert_init_tx_hdrs(isert_conn
, &isert_cmd
->tx_desc
);
2163 isert_init_send_wr(isert_conn
, isert_cmd
,
2164 &isert_cmd
->tx_desc
.send_wr
);
2166 rc
= isert_post_recv(isert_conn
, isert_cmd
->rx_desc
);
2168 isert_err("ib_post_recv failed with %d\n", rc
);
2172 chain_wr
= &isert_cmd
->tx_desc
.send_wr
;
2175 isert_rdma_rw_ctx_post(isert_cmd
, isert_conn
, cqe
, chain_wr
);
2176 isert_dbg("Cmd: %p posted RDMA_WRITE for iSER Data READ\n", isert_cmd
);
2181 isert_get_dataout(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
, bool recovery
)
2183 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
2185 isert_dbg("Cmd: %p RDMA_READ data_length: %u write_data_done: %u\n",
2186 isert_cmd
, cmd
->se_cmd
.data_length
, cmd
->write_data_done
);
2188 isert_cmd
->tx_desc
.tx_cqe
.done
= isert_rdma_read_done
;
2189 isert_rdma_rw_ctx_post(isert_cmd
, conn
->context
,
2190 &isert_cmd
->tx_desc
.tx_cqe
, NULL
);
2192 isert_dbg("Cmd: %p posted RDMA_READ memory for ISER Data WRITE\n",
2198 isert_immediate_queue(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
, int state
)
2200 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
2205 spin_lock_bh(&conn
->cmd_lock
);
2206 list_del_init(&cmd
->i_conn_node
);
2207 spin_unlock_bh(&conn
->cmd_lock
);
2208 isert_put_cmd(isert_cmd
, true);
2210 case ISTATE_SEND_NOPIN_WANT_RESPONSE
:
2211 ret
= isert_put_nopin(cmd
, conn
, false);
2214 isert_err("Unknown immediate state: 0x%02x\n", state
);
2223 isert_response_queue(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
, int state
)
2225 struct isert_conn
*isert_conn
= conn
->context
;
2229 case ISTATE_SEND_LOGOUTRSP
:
2230 ret
= isert_put_logout_rsp(cmd
, conn
);
2232 isert_conn
->logout_posted
= true;
2234 case ISTATE_SEND_NOPIN
:
2235 ret
= isert_put_nopin(cmd
, conn
, true);
2237 case ISTATE_SEND_TASKMGTRSP
:
2238 ret
= isert_put_tm_rsp(cmd
, conn
);
2240 case ISTATE_SEND_REJECT
:
2241 ret
= isert_put_reject(cmd
, conn
);
2243 case ISTATE_SEND_TEXTRSP
:
2244 ret
= isert_put_text_rsp(cmd
, conn
);
2246 case ISTATE_SEND_STATUS
:
2248 * Special case for sending non GOOD SCSI status from TX thread
2249 * context during pre se_cmd excecution failure.
2251 ret
= isert_put_response(conn
, cmd
);
2254 isert_err("Unknown response state: 0x%02x\n", state
);
2263 isert_setup_id(struct isert_np
*isert_np
)
2265 struct iscsi_np
*np
= isert_np
->np
;
2266 struct rdma_cm_id
*id
;
2267 struct sockaddr
*sa
;
2270 sa
= (struct sockaddr
*)&np
->np_sockaddr
;
2271 isert_dbg("ksockaddr: %p, sa: %p\n", &np
->np_sockaddr
, sa
);
2273 id
= rdma_create_id(&init_net
, isert_cma_handler
, isert_np
,
2274 RDMA_PS_TCP
, IB_QPT_RC
);
2276 isert_err("rdma_create_id() failed: %ld\n", PTR_ERR(id
));
2280 isert_dbg("id %p context %p\n", id
, id
->context
);
2282 ret
= rdma_bind_addr(id
, sa
);
2284 isert_err("rdma_bind_addr() failed: %d\n", ret
);
2288 ret
= rdma_listen(id
, 0);
2290 isert_err("rdma_listen() failed: %d\n", ret
);
2296 rdma_destroy_id(id
);
2298 return ERR_PTR(ret
);
2302 isert_setup_np(struct iscsi_np
*np
,
2303 struct sockaddr_storage
*ksockaddr
)
2305 struct isert_np
*isert_np
;
2306 struct rdma_cm_id
*isert_lid
;
2309 isert_np
= kzalloc(sizeof(struct isert_np
), GFP_KERNEL
);
2311 isert_err("Unable to allocate struct isert_np\n");
2314 sema_init(&isert_np
->sem
, 0);
2315 mutex_init(&isert_np
->mutex
);
2316 INIT_LIST_HEAD(&isert_np
->accepted
);
2317 INIT_LIST_HEAD(&isert_np
->pending
);
2321 * Setup the np->np_sockaddr from the passed sockaddr setup
2322 * in iscsi_target_configfs.c code..
2324 memcpy(&np
->np_sockaddr
, ksockaddr
,
2325 sizeof(struct sockaddr_storage
));
2327 isert_lid
= isert_setup_id(isert_np
);
2328 if (IS_ERR(isert_lid
)) {
2329 ret
= PTR_ERR(isert_lid
);
2333 isert_np
->cm_id
= isert_lid
;
2334 np
->np_context
= isert_np
;
2345 isert_rdma_accept(struct isert_conn
*isert_conn
)
2347 struct rdma_cm_id
*cm_id
= isert_conn
->cm_id
;
2348 struct rdma_conn_param cp
;
2350 struct iser_cm_hdr rsp_hdr
;
2352 memset(&cp
, 0, sizeof(struct rdma_conn_param
));
2353 cp
.initiator_depth
= isert_conn
->initiator_depth
;
2355 cp
.rnr_retry_count
= 7;
2357 memset(&rsp_hdr
, 0, sizeof(rsp_hdr
));
2358 rsp_hdr
.flags
= ISERT_ZBVA_NOT_USED
;
2359 if (!isert_conn
->snd_w_inv
)
2360 rsp_hdr
.flags
= rsp_hdr
.flags
| ISERT_SEND_W_INV_NOT_USED
;
2361 cp
.private_data
= (void *)&rsp_hdr
;
2362 cp
.private_data_len
= sizeof(rsp_hdr
);
2364 ret
= rdma_accept(cm_id
, &cp
);
2366 isert_err("rdma_accept() failed with: %d\n", ret
);
2374 isert_get_login_rx(struct iscsi_conn
*conn
, struct iscsi_login
*login
)
2376 struct isert_conn
*isert_conn
= conn
->context
;
2379 isert_info("before login_req comp conn: %p\n", isert_conn
);
2380 ret
= wait_for_completion_interruptible(&isert_conn
->login_req_comp
);
2382 isert_err("isert_conn %p interrupted before got login req\n",
2386 reinit_completion(&isert_conn
->login_req_comp
);
2389 * For login requests after the first PDU, isert_rx_login_req() will
2390 * kick schedule_delayed_work(&conn->login_work) as the packet is
2391 * received, which turns this callback from iscsi_target_do_login_rx()
2394 if (!login
->first_request
)
2397 isert_rx_login_req(isert_conn
);
2399 isert_info("before login_comp conn: %p\n", conn
);
2400 ret
= wait_for_completion_interruptible(&isert_conn
->login_comp
);
2404 isert_info("processing login->req: %p\n", login
->req
);
2410 isert_set_conn_info(struct iscsi_np
*np
, struct iscsi_conn
*conn
,
2411 struct isert_conn
*isert_conn
)
2413 struct rdma_cm_id
*cm_id
= isert_conn
->cm_id
;
2414 struct rdma_route
*cm_route
= &cm_id
->route
;
2416 conn
->login_family
= np
->np_sockaddr
.ss_family
;
2418 conn
->login_sockaddr
= cm_route
->addr
.dst_addr
;
2419 conn
->local_sockaddr
= cm_route
->addr
.src_addr
;
2423 isert_accept_np(struct iscsi_np
*np
, struct iscsi_conn
*conn
)
2425 struct isert_np
*isert_np
= np
->np_context
;
2426 struct isert_conn
*isert_conn
;
2430 ret
= down_interruptible(&isert_np
->sem
);
2434 spin_lock_bh(&np
->np_thread_lock
);
2435 if (np
->np_thread_state
>= ISCSI_NP_THREAD_RESET
) {
2436 spin_unlock_bh(&np
->np_thread_lock
);
2437 isert_dbg("np_thread_state %d\n",
2438 np
->np_thread_state
);
2440 * No point in stalling here when np_thread
2441 * is in state RESET/SHUTDOWN/EXIT - bail
2445 spin_unlock_bh(&np
->np_thread_lock
);
2447 mutex_lock(&isert_np
->mutex
);
2448 if (list_empty(&isert_np
->pending
)) {
2449 mutex_unlock(&isert_np
->mutex
);
2452 isert_conn
= list_first_entry(&isert_np
->pending
,
2453 struct isert_conn
, node
);
2454 list_del_init(&isert_conn
->node
);
2455 mutex_unlock(&isert_np
->mutex
);
2457 conn
->context
= isert_conn
;
2458 isert_conn
->conn
= conn
;
2459 isert_conn
->state
= ISER_CONN_BOUND
;
2461 isert_set_conn_info(np
, conn
, isert_conn
);
2463 isert_dbg("Processing isert_conn: %p\n", isert_conn
);
2469 isert_free_np(struct iscsi_np
*np
)
2471 struct isert_np
*isert_np
= np
->np_context
;
2472 struct isert_conn
*isert_conn
, *n
;
2474 if (isert_np
->cm_id
)
2475 rdma_destroy_id(isert_np
->cm_id
);
2478 * FIXME: At this point we don't have a good way to insure
2479 * that at this point we don't have hanging connections that
2480 * completed RDMA establishment but didn't start iscsi login
2481 * process. So work-around this by cleaning up what ever piled
2482 * up in accepted and pending lists.
2484 mutex_lock(&isert_np
->mutex
);
2485 if (!list_empty(&isert_np
->pending
)) {
2486 isert_info("Still have isert pending connections\n");
2487 list_for_each_entry_safe(isert_conn
, n
,
2490 isert_info("cleaning isert_conn %p state (%d)\n",
2491 isert_conn
, isert_conn
->state
);
2492 isert_connect_release(isert_conn
);
2496 if (!list_empty(&isert_np
->accepted
)) {
2497 isert_info("Still have isert accepted connections\n");
2498 list_for_each_entry_safe(isert_conn
, n
,
2499 &isert_np
->accepted
,
2501 isert_info("cleaning isert_conn %p state (%d)\n",
2502 isert_conn
, isert_conn
->state
);
2503 isert_connect_release(isert_conn
);
2506 mutex_unlock(&isert_np
->mutex
);
2508 np
->np_context
= NULL
;
2512 static void isert_release_work(struct work_struct
*work
)
2514 struct isert_conn
*isert_conn
= container_of(work
,
2518 isert_info("Starting release conn %p\n", isert_conn
);
2520 mutex_lock(&isert_conn
->mutex
);
2521 isert_conn
->state
= ISER_CONN_DOWN
;
2522 mutex_unlock(&isert_conn
->mutex
);
2524 isert_info("Destroying conn %p\n", isert_conn
);
2525 isert_put_conn(isert_conn
);
2529 isert_wait4logout(struct isert_conn
*isert_conn
)
2531 struct iscsi_conn
*conn
= isert_conn
->conn
;
2533 isert_info("conn %p\n", isert_conn
);
2535 if (isert_conn
->logout_posted
) {
2536 isert_info("conn %p wait for conn_logout_comp\n", isert_conn
);
2537 wait_for_completion_timeout(&conn
->conn_logout_comp
,
2538 SECONDS_FOR_LOGOUT_COMP
* HZ
);
2543 isert_wait4cmds(struct iscsi_conn
*conn
)
2545 isert_info("iscsi_conn %p\n", conn
);
2548 target_sess_cmd_list_set_waiting(conn
->sess
->se_sess
);
2549 target_wait_for_sess_cmds(conn
->sess
->se_sess
);
2554 * isert_put_unsol_pending_cmds() - Drop commands waiting for
2555 * unsolicitate dataout
2556 * @conn: iscsi connection
2558 * We might still have commands that are waiting for unsolicited
2559 * dataouts messages. We must put the extra reference on those
2560 * before blocking on the target_wait_for_session_cmds
2563 isert_put_unsol_pending_cmds(struct iscsi_conn
*conn
)
2565 struct iscsi_cmd
*cmd
, *tmp
;
2566 static LIST_HEAD(drop_cmd_list
);
2568 spin_lock_bh(&conn
->cmd_lock
);
2569 list_for_each_entry_safe(cmd
, tmp
, &conn
->conn_cmd_list
, i_conn_node
) {
2570 if ((cmd
->cmd_flags
& ICF_NON_IMMEDIATE_UNSOLICITED_DATA
) &&
2571 (cmd
->write_data_done
< conn
->sess
->sess_ops
->FirstBurstLength
) &&
2572 (cmd
->write_data_done
< cmd
->se_cmd
.data_length
))
2573 list_move_tail(&cmd
->i_conn_node
, &drop_cmd_list
);
2575 spin_unlock_bh(&conn
->cmd_lock
);
2577 list_for_each_entry_safe(cmd
, tmp
, &drop_cmd_list
, i_conn_node
) {
2578 list_del_init(&cmd
->i_conn_node
);
2579 if (cmd
->i_state
!= ISTATE_REMOVE
) {
2580 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
2582 isert_info("conn %p dropping cmd %p\n", conn
, cmd
);
2583 isert_put_cmd(isert_cmd
, true);
2588 static void isert_wait_conn(struct iscsi_conn
*conn
)
2590 struct isert_conn
*isert_conn
= conn
->context
;
2592 isert_info("Starting conn %p\n", isert_conn
);
2594 mutex_lock(&isert_conn
->mutex
);
2595 isert_conn_terminate(isert_conn
);
2596 mutex_unlock(&isert_conn
->mutex
);
2598 ib_drain_qp(isert_conn
->qp
);
2599 isert_put_unsol_pending_cmds(conn
);
2600 isert_wait4cmds(conn
);
2601 isert_wait4logout(isert_conn
);
2603 queue_work(isert_release_wq
, &isert_conn
->release_work
);
2606 static void isert_free_conn(struct iscsi_conn
*conn
)
2608 struct isert_conn
*isert_conn
= conn
->context
;
2610 ib_drain_qp(isert_conn
->qp
);
2611 isert_put_conn(isert_conn
);
2614 static void isert_get_rx_pdu(struct iscsi_conn
*conn
)
2616 struct completion comp
;
2618 init_completion(&comp
);
2620 wait_for_completion_interruptible(&comp
);
2623 static struct iscsit_transport iser_target_transport
= {
2625 .transport_type
= ISCSI_INFINIBAND
,
2626 .rdma_shutdown
= true,
2627 .priv_size
= sizeof(struct isert_cmd
),
2628 .owner
= THIS_MODULE
,
2629 .iscsit_setup_np
= isert_setup_np
,
2630 .iscsit_accept_np
= isert_accept_np
,
2631 .iscsit_free_np
= isert_free_np
,
2632 .iscsit_wait_conn
= isert_wait_conn
,
2633 .iscsit_free_conn
= isert_free_conn
,
2634 .iscsit_get_login_rx
= isert_get_login_rx
,
2635 .iscsit_put_login_tx
= isert_put_login_tx
,
2636 .iscsit_immediate_queue
= isert_immediate_queue
,
2637 .iscsit_response_queue
= isert_response_queue
,
2638 .iscsit_get_dataout
= isert_get_dataout
,
2639 .iscsit_queue_data_in
= isert_put_datain
,
2640 .iscsit_queue_status
= isert_put_response
,
2641 .iscsit_aborted_task
= isert_aborted_task
,
2642 .iscsit_get_rx_pdu
= isert_get_rx_pdu
,
2643 .iscsit_get_sup_prot_ops
= isert_get_sup_prot_ops
,
2646 static int __init
isert_init(void)
2650 isert_comp_wq
= alloc_workqueue("isert_comp_wq",
2651 WQ_UNBOUND
| WQ_HIGHPRI
, 0);
2652 if (!isert_comp_wq
) {
2653 isert_err("Unable to allocate isert_comp_wq\n");
2658 isert_release_wq
= alloc_workqueue("isert_release_wq", WQ_UNBOUND
,
2659 WQ_UNBOUND_MAX_ACTIVE
);
2660 if (!isert_release_wq
) {
2661 isert_err("Unable to allocate isert_release_wq\n");
2663 goto destroy_comp_wq
;
2666 iscsit_register_transport(&iser_target_transport
);
2667 isert_info("iSER_TARGET[0] - Loaded iser_target_transport\n");
2672 destroy_workqueue(isert_comp_wq
);
2677 static void __exit
isert_exit(void)
2679 flush_scheduled_work();
2680 destroy_workqueue(isert_release_wq
);
2681 destroy_workqueue(isert_comp_wq
);
2682 iscsit_unregister_transport(&iser_target_transport
);
2683 isert_info("iSER_TARGET[0] - Released iser_target_transport\n");
2686 MODULE_DESCRIPTION("iSER-Target for mainline target infrastructure");
2687 MODULE_VERSION("1.0");
2688 MODULE_AUTHOR("nab@Linux-iSCSI.org");
2689 MODULE_LICENSE("GPL");
2691 module_init(isert_init
);
2692 module_exit(isert_exit
);