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>
32 #include "isert_proto.h"
35 #define ISERT_MAX_CONN 8
36 #define ISER_MAX_RX_CQ_LEN (ISERT_QP_MAX_RECV_DTOS * ISERT_MAX_CONN)
37 #define ISER_MAX_TX_CQ_LEN (ISERT_QP_MAX_REQ_DTOS * 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_unmap_cmd(struct isert_cmd
*isert_cmd
, struct isert_conn
*isert_conn
);
53 isert_map_rdma(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
54 struct isert_rdma_wr
*wr
);
56 isert_unreg_rdma(struct isert_cmd
*isert_cmd
, struct isert_conn
*isert_conn
);
58 isert_reg_rdma(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
59 struct isert_rdma_wr
*wr
);
61 isert_put_response(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
);
63 isert_rdma_post_recvl(struct isert_conn
*isert_conn
);
65 isert_rdma_accept(struct isert_conn
*isert_conn
);
66 struct rdma_cm_id
*isert_setup_id(struct isert_np
*isert_np
);
68 static void isert_release_work(struct work_struct
*work
);
71 isert_prot_cmd(struct isert_conn
*conn
, struct se_cmd
*cmd
)
73 return (conn
->pi_support
&&
74 cmd
->prot_op
!= TARGET_PROT_NORMAL
);
79 isert_qp_event_callback(struct ib_event
*e
, void *context
)
81 struct isert_conn
*isert_conn
= context
;
83 isert_err("%s (%d): conn %p\n",
84 ib_event_msg(e
->event
), e
->event
, isert_conn
);
87 case IB_EVENT_COMM_EST
:
88 rdma_notify(isert_conn
->cm_id
, IB_EVENT_COMM_EST
);
90 case IB_EVENT_QP_LAST_WQE_REACHED
:
91 isert_warn("Reached TX IB_EVENT_QP_LAST_WQE_REACHED\n");
99 isert_query_device(struct ib_device
*ib_dev
, struct ib_device_attr
*devattr
)
103 ret
= ib_query_device(ib_dev
, devattr
);
105 isert_err("ib_query_device() failed: %d\n", ret
);
108 isert_dbg("devattr->max_sge: %d\n", devattr
->max_sge
);
109 isert_dbg("devattr->max_sge_rd: %d\n", devattr
->max_sge_rd
);
114 static struct isert_comp
*
115 isert_comp_get(struct isert_conn
*isert_conn
)
117 struct isert_device
*device
= isert_conn
->device
;
118 struct isert_comp
*comp
;
121 mutex_lock(&device_list_mutex
);
122 for (i
= 0; i
< device
->comps_used
; i
++)
123 if (device
->comps
[i
].active_qps
<
124 device
->comps
[min
].active_qps
)
126 comp
= &device
->comps
[min
];
128 mutex_unlock(&device_list_mutex
);
130 isert_info("conn %p, using comp %p min_index: %d\n",
131 isert_conn
, comp
, min
);
137 isert_comp_put(struct isert_comp
*comp
)
139 mutex_lock(&device_list_mutex
);
141 mutex_unlock(&device_list_mutex
);
144 static struct ib_qp
*
145 isert_create_qp(struct isert_conn
*isert_conn
,
146 struct isert_comp
*comp
,
147 struct rdma_cm_id
*cma_id
)
149 struct isert_device
*device
= isert_conn
->device
;
150 struct ib_qp_init_attr attr
;
153 memset(&attr
, 0, sizeof(struct ib_qp_init_attr
));
154 attr
.event_handler
= isert_qp_event_callback
;
155 attr
.qp_context
= isert_conn
;
156 attr
.send_cq
= comp
->cq
;
157 attr
.recv_cq
= comp
->cq
;
158 attr
.cap
.max_send_wr
= ISERT_QP_MAX_REQ_DTOS
;
159 attr
.cap
.max_recv_wr
= ISERT_QP_MAX_RECV_DTOS
+ 1;
161 * FIXME: Use devattr.max_sge - 2 for max_send_sge as
162 * work-around for RDMA_READs with ConnectX-2.
164 * Also, still make sure to have at least two SGEs for
165 * outgoing control PDU responses.
167 attr
.cap
.max_send_sge
= max(2, device
->dev_attr
.max_sge
- 2);
168 isert_conn
->max_sge
= attr
.cap
.max_send_sge
;
170 attr
.cap
.max_recv_sge
= 1;
171 attr
.sq_sig_type
= IB_SIGNAL_REQ_WR
;
172 attr
.qp_type
= IB_QPT_RC
;
173 if (device
->pi_capable
)
174 attr
.create_flags
|= IB_QP_CREATE_SIGNATURE_EN
;
176 ret
= rdma_create_qp(cma_id
, device
->pd
, &attr
);
178 isert_err("rdma_create_qp failed for cma_id %d\n", ret
);
186 isert_conn_setup_qp(struct isert_conn
*isert_conn
, struct rdma_cm_id
*cma_id
)
188 struct isert_comp
*comp
;
191 comp
= isert_comp_get(isert_conn
);
192 isert_conn
->qp
= isert_create_qp(isert_conn
, comp
, cma_id
);
193 if (IS_ERR(isert_conn
->qp
)) {
194 ret
= PTR_ERR(isert_conn
->qp
);
200 isert_comp_put(comp
);
205 isert_cq_event_callback(struct ib_event
*e
, void *context
)
207 isert_dbg("event: %d\n", e
->event
);
211 isert_alloc_rx_descriptors(struct isert_conn
*isert_conn
)
213 struct isert_device
*device
= isert_conn
->device
;
214 struct ib_device
*ib_dev
= device
->ib_device
;
215 struct iser_rx_desc
*rx_desc
;
216 struct ib_sge
*rx_sg
;
220 isert_conn
->rx_descs
= kzalloc(ISERT_QP_MAX_RECV_DTOS
*
221 sizeof(struct iser_rx_desc
), GFP_KERNEL
);
222 if (!isert_conn
->rx_descs
)
225 rx_desc
= isert_conn
->rx_descs
;
227 for (i
= 0; i
< ISERT_QP_MAX_RECV_DTOS
; i
++, rx_desc
++) {
228 dma_addr
= ib_dma_map_single(ib_dev
, (void *)rx_desc
,
229 ISER_RX_PAYLOAD_SIZE
, DMA_FROM_DEVICE
);
230 if (ib_dma_mapping_error(ib_dev
, dma_addr
))
233 rx_desc
->dma_addr
= dma_addr
;
235 rx_sg
= &rx_desc
->rx_sg
;
236 rx_sg
->addr
= rx_desc
->dma_addr
;
237 rx_sg
->length
= ISER_RX_PAYLOAD_SIZE
;
238 rx_sg
->lkey
= device
->mr
->lkey
;
241 isert_conn
->rx_desc_head
= 0;
246 rx_desc
= isert_conn
->rx_descs
;
247 for (j
= 0; j
< i
; j
++, rx_desc
++) {
248 ib_dma_unmap_single(ib_dev
, rx_desc
->dma_addr
,
249 ISER_RX_PAYLOAD_SIZE
, DMA_FROM_DEVICE
);
251 kfree(isert_conn
->rx_descs
);
252 isert_conn
->rx_descs
= NULL
;
254 isert_err("conn %p failed to allocate rx descriptors\n", isert_conn
);
260 isert_free_rx_descriptors(struct isert_conn
*isert_conn
)
262 struct ib_device
*ib_dev
= isert_conn
->device
->ib_device
;
263 struct iser_rx_desc
*rx_desc
;
266 if (!isert_conn
->rx_descs
)
269 rx_desc
= isert_conn
->rx_descs
;
270 for (i
= 0; i
< ISERT_QP_MAX_RECV_DTOS
; i
++, rx_desc
++) {
271 ib_dma_unmap_single(ib_dev
, rx_desc
->dma_addr
,
272 ISER_RX_PAYLOAD_SIZE
, DMA_FROM_DEVICE
);
275 kfree(isert_conn
->rx_descs
);
276 isert_conn
->rx_descs
= NULL
;
279 static void isert_cq_work(struct work_struct
*);
280 static void isert_cq_callback(struct ib_cq
*, void *);
283 isert_free_comps(struct isert_device
*device
)
287 for (i
= 0; i
< device
->comps_used
; i
++) {
288 struct isert_comp
*comp
= &device
->comps
[i
];
291 cancel_work_sync(&comp
->work
);
292 ib_destroy_cq(comp
->cq
);
295 kfree(device
->comps
);
299 isert_alloc_comps(struct isert_device
*device
,
300 struct ib_device_attr
*attr
)
302 int i
, max_cqe
, ret
= 0;
304 device
->comps_used
= min(ISERT_MAX_CQ
, min_t(int, num_online_cpus(),
305 device
->ib_device
->num_comp_vectors
));
307 isert_info("Using %d CQs, %s supports %d vectors support "
308 "Fast registration %d pi_capable %d\n",
309 device
->comps_used
, device
->ib_device
->name
,
310 device
->ib_device
->num_comp_vectors
, device
->use_fastreg
,
313 device
->comps
= kcalloc(device
->comps_used
, sizeof(struct isert_comp
),
315 if (!device
->comps
) {
316 isert_err("Unable to allocate completion contexts\n");
320 max_cqe
= min(ISER_MAX_CQ_LEN
, attr
->max_cqe
);
322 for (i
= 0; i
< device
->comps_used
; i
++) {
323 struct ib_cq_init_attr cq_attr
= {};
324 struct isert_comp
*comp
= &device
->comps
[i
];
326 comp
->device
= device
;
327 INIT_WORK(&comp
->work
, isert_cq_work
);
328 cq_attr
.cqe
= max_cqe
;
329 cq_attr
.comp_vector
= i
;
330 comp
->cq
= ib_create_cq(device
->ib_device
,
332 isert_cq_event_callback
,
335 if (IS_ERR(comp
->cq
)) {
336 isert_err("Unable to allocate cq\n");
337 ret
= PTR_ERR(comp
->cq
);
342 ret
= ib_req_notify_cq(comp
->cq
, IB_CQ_NEXT_COMP
);
349 isert_free_comps(device
);
354 isert_create_device_ib_res(struct isert_device
*device
)
356 struct ib_device_attr
*dev_attr
;
359 dev_attr
= &device
->dev_attr
;
360 ret
= isert_query_device(device
->ib_device
, dev_attr
);
364 /* asign function handlers */
365 if (dev_attr
->device_cap_flags
& IB_DEVICE_MEM_MGT_EXTENSIONS
&&
366 dev_attr
->device_cap_flags
& IB_DEVICE_SIGNATURE_HANDOVER
) {
367 device
->use_fastreg
= 1;
368 device
->reg_rdma_mem
= isert_reg_rdma
;
369 device
->unreg_rdma_mem
= isert_unreg_rdma
;
371 device
->use_fastreg
= 0;
372 device
->reg_rdma_mem
= isert_map_rdma
;
373 device
->unreg_rdma_mem
= isert_unmap_cmd
;
376 ret
= isert_alloc_comps(device
, dev_attr
);
380 device
->pd
= ib_alloc_pd(device
->ib_device
);
381 if (IS_ERR(device
->pd
)) {
382 ret
= PTR_ERR(device
->pd
);
383 isert_err("failed to allocate pd, device %p, ret=%d\n",
388 device
->mr
= ib_get_dma_mr(device
->pd
, IB_ACCESS_LOCAL_WRITE
);
389 if (IS_ERR(device
->mr
)) {
390 ret
= PTR_ERR(device
->mr
);
391 isert_err("failed to create dma mr, device %p, ret=%d\n",
396 /* Check signature cap */
397 device
->pi_capable
= dev_attr
->device_cap_flags
&
398 IB_DEVICE_SIGNATURE_HANDOVER
? true : false;
403 ib_dealloc_pd(device
->pd
);
405 isert_free_comps(device
);
410 isert_free_device_ib_res(struct isert_device
*device
)
412 isert_info("device %p\n", device
);
414 ib_dereg_mr(device
->mr
);
415 ib_dealloc_pd(device
->pd
);
416 isert_free_comps(device
);
420 isert_device_put(struct isert_device
*device
)
422 mutex_lock(&device_list_mutex
);
424 isert_info("device %p refcount %d\n", device
, device
->refcount
);
425 if (!device
->refcount
) {
426 isert_free_device_ib_res(device
);
427 list_del(&device
->dev_node
);
430 mutex_unlock(&device_list_mutex
);
433 static struct isert_device
*
434 isert_device_get(struct rdma_cm_id
*cma_id
)
436 struct isert_device
*device
;
439 mutex_lock(&device_list_mutex
);
440 list_for_each_entry(device
, &device_list
, dev_node
) {
441 if (device
->ib_device
->node_guid
== cma_id
->device
->node_guid
) {
443 isert_info("Found iser device %p refcount %d\n",
444 device
, device
->refcount
);
445 mutex_unlock(&device_list_mutex
);
450 device
= kzalloc(sizeof(struct isert_device
), GFP_KERNEL
);
452 mutex_unlock(&device_list_mutex
);
453 return ERR_PTR(-ENOMEM
);
456 INIT_LIST_HEAD(&device
->dev_node
);
458 device
->ib_device
= cma_id
->device
;
459 ret
= isert_create_device_ib_res(device
);
462 mutex_unlock(&device_list_mutex
);
467 list_add_tail(&device
->dev_node
, &device_list
);
468 isert_info("Created a new iser device %p refcount %d\n",
469 device
, device
->refcount
);
470 mutex_unlock(&device_list_mutex
);
476 isert_conn_free_fastreg_pool(struct isert_conn
*isert_conn
)
478 struct fast_reg_descriptor
*fr_desc
, *tmp
;
481 if (list_empty(&isert_conn
->fr_pool
))
484 isert_info("Freeing conn %p fastreg pool", isert_conn
);
486 list_for_each_entry_safe(fr_desc
, tmp
,
487 &isert_conn
->fr_pool
, list
) {
488 list_del(&fr_desc
->list
);
489 ib_free_fast_reg_page_list(fr_desc
->data_frpl
);
490 ib_dereg_mr(fr_desc
->data_mr
);
491 if (fr_desc
->pi_ctx
) {
492 ib_free_fast_reg_page_list(fr_desc
->pi_ctx
->prot_frpl
);
493 ib_dereg_mr(fr_desc
->pi_ctx
->prot_mr
);
494 ib_dereg_mr(fr_desc
->pi_ctx
->sig_mr
);
495 kfree(fr_desc
->pi_ctx
);
501 if (i
< isert_conn
->fr_pool_size
)
502 isert_warn("Pool still has %d regions registered\n",
503 isert_conn
->fr_pool_size
- i
);
507 isert_create_pi_ctx(struct fast_reg_descriptor
*desc
,
508 struct ib_device
*device
,
511 struct pi_context
*pi_ctx
;
514 pi_ctx
= kzalloc(sizeof(*desc
->pi_ctx
), GFP_KERNEL
);
516 isert_err("Failed to allocate pi context\n");
520 pi_ctx
->prot_frpl
= ib_alloc_fast_reg_page_list(device
,
521 ISCSI_ISER_SG_TABLESIZE
);
522 if (IS_ERR(pi_ctx
->prot_frpl
)) {
523 isert_err("Failed to allocate prot frpl err=%ld\n",
524 PTR_ERR(pi_ctx
->prot_frpl
));
525 ret
= PTR_ERR(pi_ctx
->prot_frpl
);
529 pi_ctx
->prot_mr
= ib_alloc_fast_reg_mr(pd
, ISCSI_ISER_SG_TABLESIZE
);
530 if (IS_ERR(pi_ctx
->prot_mr
)) {
531 isert_err("Failed to allocate prot frmr err=%ld\n",
532 PTR_ERR(pi_ctx
->prot_mr
));
533 ret
= PTR_ERR(pi_ctx
->prot_mr
);
536 desc
->ind
|= ISERT_PROT_KEY_VALID
;
538 pi_ctx
->sig_mr
= ib_alloc_mr(pd
, IB_MR_TYPE_SIGNATURE
, 2);
539 if (IS_ERR(pi_ctx
->sig_mr
)) {
540 isert_err("Failed to allocate signature enabled mr err=%ld\n",
541 PTR_ERR(pi_ctx
->sig_mr
));
542 ret
= PTR_ERR(pi_ctx
->sig_mr
);
546 desc
->pi_ctx
= pi_ctx
;
547 desc
->ind
|= ISERT_SIG_KEY_VALID
;
548 desc
->ind
&= ~ISERT_PROTECTED
;
553 ib_dereg_mr(pi_ctx
->prot_mr
);
555 ib_free_fast_reg_page_list(pi_ctx
->prot_frpl
);
563 isert_create_fr_desc(struct ib_device
*ib_device
, struct ib_pd
*pd
,
564 struct fast_reg_descriptor
*fr_desc
)
568 fr_desc
->data_frpl
= ib_alloc_fast_reg_page_list(ib_device
,
569 ISCSI_ISER_SG_TABLESIZE
);
570 if (IS_ERR(fr_desc
->data_frpl
)) {
571 isert_err("Failed to allocate data frpl err=%ld\n",
572 PTR_ERR(fr_desc
->data_frpl
));
573 return PTR_ERR(fr_desc
->data_frpl
);
576 fr_desc
->data_mr
= ib_alloc_fast_reg_mr(pd
, ISCSI_ISER_SG_TABLESIZE
);
577 if (IS_ERR(fr_desc
->data_mr
)) {
578 isert_err("Failed to allocate data frmr err=%ld\n",
579 PTR_ERR(fr_desc
->data_mr
));
580 ret
= PTR_ERR(fr_desc
->data_mr
);
583 fr_desc
->ind
|= ISERT_DATA_KEY_VALID
;
585 isert_dbg("Created fr_desc %p\n", fr_desc
);
590 ib_free_fast_reg_page_list(fr_desc
->data_frpl
);
596 isert_conn_create_fastreg_pool(struct isert_conn
*isert_conn
)
598 struct fast_reg_descriptor
*fr_desc
;
599 struct isert_device
*device
= isert_conn
->device
;
600 struct se_session
*se_sess
= isert_conn
->conn
->sess
->se_sess
;
601 struct se_node_acl
*se_nacl
= se_sess
->se_node_acl
;
604 * Setup the number of FRMRs based upon the number of tags
605 * available to session in iscsi_target_locate_portal().
607 tag_num
= max_t(u32
, ISCSIT_MIN_TAGS
, se_nacl
->queue_depth
);
608 tag_num
= (tag_num
* 2) + ISCSIT_EXTRA_TAGS
;
610 isert_conn
->fr_pool_size
= 0;
611 for (i
= 0; i
< tag_num
; i
++) {
612 fr_desc
= kzalloc(sizeof(*fr_desc
), GFP_KERNEL
);
614 isert_err("Failed to allocate fast_reg descriptor\n");
619 ret
= isert_create_fr_desc(device
->ib_device
,
620 device
->pd
, fr_desc
);
622 isert_err("Failed to create fastreg descriptor err=%d\n",
628 list_add_tail(&fr_desc
->list
, &isert_conn
->fr_pool
);
629 isert_conn
->fr_pool_size
++;
632 isert_dbg("Creating conn %p fastreg pool size=%d",
633 isert_conn
, isert_conn
->fr_pool_size
);
638 isert_conn_free_fastreg_pool(isert_conn
);
643 isert_init_conn(struct isert_conn
*isert_conn
)
645 isert_conn
->state
= ISER_CONN_INIT
;
646 INIT_LIST_HEAD(&isert_conn
->accept_node
);
647 init_completion(&isert_conn
->login_comp
);
648 init_completion(&isert_conn
->login_req_comp
);
649 init_completion(&isert_conn
->wait
);
650 kref_init(&isert_conn
->kref
);
651 mutex_init(&isert_conn
->mutex
);
652 spin_lock_init(&isert_conn
->pool_lock
);
653 INIT_LIST_HEAD(&isert_conn
->fr_pool
);
654 INIT_WORK(&isert_conn
->release_work
, isert_release_work
);
658 isert_free_login_buf(struct isert_conn
*isert_conn
)
660 struct ib_device
*ib_dev
= isert_conn
->device
->ib_device
;
662 ib_dma_unmap_single(ib_dev
, isert_conn
->login_rsp_dma
,
663 ISER_RX_LOGIN_SIZE
, DMA_TO_DEVICE
);
664 ib_dma_unmap_single(ib_dev
, isert_conn
->login_req_dma
,
665 ISCSI_DEF_MAX_RECV_SEG_LEN
,
667 kfree(isert_conn
->login_buf
);
671 isert_alloc_login_buf(struct isert_conn
*isert_conn
,
672 struct ib_device
*ib_dev
)
676 isert_conn
->login_buf
= kzalloc(ISCSI_DEF_MAX_RECV_SEG_LEN
+
677 ISER_RX_LOGIN_SIZE
, GFP_KERNEL
);
678 if (!isert_conn
->login_buf
) {
679 isert_err("Unable to allocate isert_conn->login_buf\n");
683 isert_conn
->login_req_buf
= isert_conn
->login_buf
;
684 isert_conn
->login_rsp_buf
= isert_conn
->login_buf
+
685 ISCSI_DEF_MAX_RECV_SEG_LEN
;
687 isert_dbg("Set login_buf: %p login_req_buf: %p login_rsp_buf: %p\n",
688 isert_conn
->login_buf
, isert_conn
->login_req_buf
,
689 isert_conn
->login_rsp_buf
);
691 isert_conn
->login_req_dma
= ib_dma_map_single(ib_dev
,
692 (void *)isert_conn
->login_req_buf
,
693 ISCSI_DEF_MAX_RECV_SEG_LEN
, DMA_FROM_DEVICE
);
695 ret
= ib_dma_mapping_error(ib_dev
, isert_conn
->login_req_dma
);
697 isert_err("login_req_dma mapping error: %d\n", ret
);
698 isert_conn
->login_req_dma
= 0;
702 isert_conn
->login_rsp_dma
= ib_dma_map_single(ib_dev
,
703 (void *)isert_conn
->login_rsp_buf
,
704 ISER_RX_LOGIN_SIZE
, DMA_TO_DEVICE
);
706 ret
= ib_dma_mapping_error(ib_dev
, isert_conn
->login_rsp_dma
);
708 isert_err("login_rsp_dma mapping error: %d\n", ret
);
709 isert_conn
->login_rsp_dma
= 0;
710 goto out_req_dma_map
;
716 ib_dma_unmap_single(ib_dev
, isert_conn
->login_req_dma
,
717 ISCSI_DEF_MAX_RECV_SEG_LEN
, DMA_FROM_DEVICE
);
719 kfree(isert_conn
->login_buf
);
724 isert_connect_request(struct rdma_cm_id
*cma_id
, struct rdma_cm_event
*event
)
726 struct isert_np
*isert_np
= cma_id
->context
;
727 struct iscsi_np
*np
= isert_np
->np
;
728 struct isert_conn
*isert_conn
;
729 struct isert_device
*device
;
732 spin_lock_bh(&np
->np_thread_lock
);
734 spin_unlock_bh(&np
->np_thread_lock
);
735 isert_dbg("iscsi_np is not enabled, reject connect request\n");
736 return rdma_reject(cma_id
, NULL
, 0);
738 spin_unlock_bh(&np
->np_thread_lock
);
740 isert_dbg("cma_id: %p, portal: %p\n",
741 cma_id
, cma_id
->context
);
743 isert_conn
= kzalloc(sizeof(struct isert_conn
), GFP_KERNEL
);
747 isert_init_conn(isert_conn
);
748 isert_conn
->cm_id
= cma_id
;
750 ret
= isert_alloc_login_buf(isert_conn
, cma_id
->device
);
754 device
= isert_device_get(cma_id
);
755 if (IS_ERR(device
)) {
756 ret
= PTR_ERR(device
);
757 goto out_rsp_dma_map
;
759 isert_conn
->device
= device
;
761 /* Set max inflight RDMA READ requests */
762 isert_conn
->initiator_depth
= min_t(u8
,
763 event
->param
.conn
.initiator_depth
,
764 device
->dev_attr
.max_qp_init_rd_atom
);
765 isert_dbg("Using initiator_depth: %u\n", isert_conn
->initiator_depth
);
767 ret
= isert_conn_setup_qp(isert_conn
, cma_id
);
771 ret
= isert_rdma_post_recvl(isert_conn
);
775 * Obtain the second reference now before isert_rdma_accept() to
776 * ensure that any initiator generated REJECT CM event that occurs
777 * asynchronously won't drop the last reference until the error path
778 * in iscsi_target_login_sess_out() does it's ->iscsit_free_conn() ->
779 * isert_free_conn() -> isert_put_conn() -> kref_put().
781 if (!kref_get_unless_zero(&isert_conn
->kref
)) {
782 isert_warn("conn %p connect_release is running\n", isert_conn
);
786 ret
= isert_rdma_accept(isert_conn
);
790 mutex_lock(&isert_np
->np_accept_mutex
);
791 list_add_tail(&isert_conn
->accept_node
, &isert_np
->np_accept_list
);
792 mutex_unlock(&isert_np
->np_accept_mutex
);
794 isert_info("np %p: Allow accept_np to continue\n", np
);
795 up(&isert_np
->np_sem
);
799 isert_device_put(device
);
801 isert_free_login_buf(isert_conn
);
804 rdma_reject(cma_id
, NULL
, 0);
809 isert_connect_release(struct isert_conn
*isert_conn
)
811 struct isert_device
*device
= isert_conn
->device
;
813 isert_dbg("conn %p\n", isert_conn
);
817 if (device
->use_fastreg
)
818 isert_conn_free_fastreg_pool(isert_conn
);
820 isert_free_rx_descriptors(isert_conn
);
821 if (isert_conn
->cm_id
)
822 rdma_destroy_id(isert_conn
->cm_id
);
824 if (isert_conn
->qp
) {
825 struct isert_comp
*comp
= isert_conn
->qp
->recv_cq
->cq_context
;
827 isert_comp_put(comp
);
828 ib_destroy_qp(isert_conn
->qp
);
831 if (isert_conn
->login_buf
)
832 isert_free_login_buf(isert_conn
);
834 isert_device_put(device
);
840 isert_connected_handler(struct rdma_cm_id
*cma_id
)
842 struct isert_conn
*isert_conn
= cma_id
->qp
->qp_context
;
844 isert_info("conn %p\n", isert_conn
);
846 mutex_lock(&isert_conn
->mutex
);
847 if (isert_conn
->state
!= ISER_CONN_FULL_FEATURE
)
848 isert_conn
->state
= ISER_CONN_UP
;
849 mutex_unlock(&isert_conn
->mutex
);
853 isert_release_kref(struct kref
*kref
)
855 struct isert_conn
*isert_conn
= container_of(kref
,
856 struct isert_conn
, kref
);
858 isert_info("conn %p final kref %s/%d\n", isert_conn
, current
->comm
,
861 isert_connect_release(isert_conn
);
865 isert_put_conn(struct isert_conn
*isert_conn
)
867 kref_put(&isert_conn
->kref
, isert_release_kref
);
871 * isert_conn_terminate() - Initiate connection termination
872 * @isert_conn: isert connection struct
875 * In case the connection state is FULL_FEATURE, move state
876 * to TEMINATING and start teardown sequence (rdma_disconnect).
877 * In case the connection state is UP, complete flush as well.
879 * This routine must be called with mutex held. Thus it is
880 * safe to call multiple times.
883 isert_conn_terminate(struct isert_conn
*isert_conn
)
887 switch (isert_conn
->state
) {
888 case ISER_CONN_TERMINATING
:
891 case ISER_CONN_FULL_FEATURE
: /* FALLTHRU */
892 isert_info("Terminating conn %p state %d\n",
893 isert_conn
, isert_conn
->state
);
894 isert_conn
->state
= ISER_CONN_TERMINATING
;
895 err
= rdma_disconnect(isert_conn
->cm_id
);
897 isert_warn("Failed rdma_disconnect isert_conn %p\n",
901 isert_warn("conn %p teminating in state %d\n",
902 isert_conn
, isert_conn
->state
);
907 isert_np_cma_handler(struct isert_np
*isert_np
,
908 enum rdma_cm_event_type event
)
910 isert_dbg("%s (%d): isert np %p\n",
911 rdma_event_msg(event
), event
, isert_np
);
914 case RDMA_CM_EVENT_DEVICE_REMOVAL
:
915 isert_np
->np_cm_id
= NULL
;
917 case RDMA_CM_EVENT_ADDR_CHANGE
:
918 isert_np
->np_cm_id
= isert_setup_id(isert_np
);
919 if (IS_ERR(isert_np
->np_cm_id
)) {
920 isert_err("isert np %p setup id failed: %ld\n",
921 isert_np
, PTR_ERR(isert_np
->np_cm_id
));
922 isert_np
->np_cm_id
= NULL
;
926 isert_err("isert np %p Unexpected event %d\n",
934 isert_disconnected_handler(struct rdma_cm_id
*cma_id
,
935 enum rdma_cm_event_type event
)
937 struct isert_np
*isert_np
= cma_id
->context
;
938 struct isert_conn
*isert_conn
;
939 bool terminating
= false;
941 if (isert_np
->np_cm_id
== cma_id
)
942 return isert_np_cma_handler(cma_id
->context
, event
);
944 isert_conn
= cma_id
->qp
->qp_context
;
946 mutex_lock(&isert_conn
->mutex
);
947 terminating
= (isert_conn
->state
== ISER_CONN_TERMINATING
);
948 isert_conn_terminate(isert_conn
);
949 mutex_unlock(&isert_conn
->mutex
);
951 isert_info("conn %p completing wait\n", isert_conn
);
952 complete(&isert_conn
->wait
);
957 mutex_lock(&isert_np
->np_accept_mutex
);
958 if (!list_empty(&isert_conn
->accept_node
)) {
959 list_del_init(&isert_conn
->accept_node
);
960 isert_put_conn(isert_conn
);
961 queue_work(isert_release_wq
, &isert_conn
->release_work
);
963 mutex_unlock(&isert_np
->np_accept_mutex
);
970 isert_connect_error(struct rdma_cm_id
*cma_id
)
972 struct isert_conn
*isert_conn
= cma_id
->qp
->qp_context
;
974 isert_conn
->cm_id
= NULL
;
975 isert_put_conn(isert_conn
);
981 isert_cma_handler(struct rdma_cm_id
*cma_id
, struct rdma_cm_event
*event
)
985 isert_info("%s (%d): status %d id %p np %p\n",
986 rdma_event_msg(event
->event
), event
->event
,
987 event
->status
, cma_id
, cma_id
->context
);
989 switch (event
->event
) {
990 case RDMA_CM_EVENT_CONNECT_REQUEST
:
991 ret
= isert_connect_request(cma_id
, event
);
993 isert_err("failed handle connect request %d\n", ret
);
995 case RDMA_CM_EVENT_ESTABLISHED
:
996 isert_connected_handler(cma_id
);
998 case RDMA_CM_EVENT_ADDR_CHANGE
: /* FALLTHRU */
999 case RDMA_CM_EVENT_DISCONNECTED
: /* FALLTHRU */
1000 case RDMA_CM_EVENT_DEVICE_REMOVAL
: /* FALLTHRU */
1001 case RDMA_CM_EVENT_TIMEWAIT_EXIT
: /* FALLTHRU */
1002 ret
= isert_disconnected_handler(cma_id
, event
->event
);
1004 case RDMA_CM_EVENT_REJECTED
: /* FALLTHRU */
1005 case RDMA_CM_EVENT_UNREACHABLE
: /* FALLTHRU */
1006 case RDMA_CM_EVENT_CONNECT_ERROR
:
1007 ret
= isert_connect_error(cma_id
);
1010 isert_err("Unhandled RDMA CMA event: %d\n", event
->event
);
1018 isert_post_recv(struct isert_conn
*isert_conn
, u32 count
)
1020 struct ib_recv_wr
*rx_wr
, *rx_wr_failed
;
1022 unsigned int rx_head
= isert_conn
->rx_desc_head
;
1023 struct iser_rx_desc
*rx_desc
;
1025 for (rx_wr
= isert_conn
->rx_wr
, i
= 0; i
< count
; i
++, rx_wr
++) {
1026 rx_desc
= &isert_conn
->rx_descs
[rx_head
];
1027 rx_wr
->wr_id
= (uintptr_t)rx_desc
;
1028 rx_wr
->sg_list
= &rx_desc
->rx_sg
;
1030 rx_wr
->next
= rx_wr
+ 1;
1031 rx_head
= (rx_head
+ 1) & (ISERT_QP_MAX_RECV_DTOS
- 1);
1035 rx_wr
->next
= NULL
; /* mark end of work requests list */
1037 isert_conn
->post_recv_buf_count
+= count
;
1038 ret
= ib_post_recv(isert_conn
->qp
, isert_conn
->rx_wr
,
1041 isert_err("ib_post_recv() failed with ret: %d\n", ret
);
1042 isert_conn
->post_recv_buf_count
-= count
;
1044 isert_dbg("Posted %d RX buffers\n", count
);
1045 isert_conn
->rx_desc_head
= rx_head
;
1051 isert_post_send(struct isert_conn
*isert_conn
, struct iser_tx_desc
*tx_desc
)
1053 struct ib_device
*ib_dev
= isert_conn
->cm_id
->device
;
1054 struct ib_send_wr send_wr
, *send_wr_failed
;
1057 ib_dma_sync_single_for_device(ib_dev
, tx_desc
->dma_addr
,
1058 ISER_HEADERS_LEN
, DMA_TO_DEVICE
);
1060 send_wr
.next
= NULL
;
1061 send_wr
.wr_id
= (uintptr_t)tx_desc
;
1062 send_wr
.sg_list
= tx_desc
->tx_sg
;
1063 send_wr
.num_sge
= tx_desc
->num_sge
;
1064 send_wr
.opcode
= IB_WR_SEND
;
1065 send_wr
.send_flags
= IB_SEND_SIGNALED
;
1067 ret
= ib_post_send(isert_conn
->qp
, &send_wr
, &send_wr_failed
);
1069 isert_err("ib_post_send() failed, ret: %d\n", ret
);
1075 isert_create_send_desc(struct isert_conn
*isert_conn
,
1076 struct isert_cmd
*isert_cmd
,
1077 struct iser_tx_desc
*tx_desc
)
1079 struct isert_device
*device
= isert_conn
->device
;
1080 struct ib_device
*ib_dev
= device
->ib_device
;
1082 ib_dma_sync_single_for_cpu(ib_dev
, tx_desc
->dma_addr
,
1083 ISER_HEADERS_LEN
, DMA_TO_DEVICE
);
1085 memset(&tx_desc
->iser_header
, 0, sizeof(struct iser_hdr
));
1086 tx_desc
->iser_header
.flags
= ISER_VER
;
1088 tx_desc
->num_sge
= 1;
1089 tx_desc
->isert_cmd
= isert_cmd
;
1091 if (tx_desc
->tx_sg
[0].lkey
!= device
->mr
->lkey
) {
1092 tx_desc
->tx_sg
[0].lkey
= device
->mr
->lkey
;
1093 isert_dbg("tx_desc %p lkey mismatch, fixing\n", tx_desc
);
1098 isert_init_tx_hdrs(struct isert_conn
*isert_conn
,
1099 struct iser_tx_desc
*tx_desc
)
1101 struct isert_device
*device
= isert_conn
->device
;
1102 struct ib_device
*ib_dev
= device
->ib_device
;
1105 dma_addr
= ib_dma_map_single(ib_dev
, (void *)tx_desc
,
1106 ISER_HEADERS_LEN
, DMA_TO_DEVICE
);
1107 if (ib_dma_mapping_error(ib_dev
, dma_addr
)) {
1108 isert_err("ib_dma_mapping_error() failed\n");
1112 tx_desc
->dma_addr
= dma_addr
;
1113 tx_desc
->tx_sg
[0].addr
= tx_desc
->dma_addr
;
1114 tx_desc
->tx_sg
[0].length
= ISER_HEADERS_LEN
;
1115 tx_desc
->tx_sg
[0].lkey
= device
->mr
->lkey
;
1117 isert_dbg("Setup tx_sg[0].addr: 0x%llx length: %u lkey: 0x%x\n",
1118 tx_desc
->tx_sg
[0].addr
, tx_desc
->tx_sg
[0].length
,
1119 tx_desc
->tx_sg
[0].lkey
);
1125 isert_init_send_wr(struct isert_conn
*isert_conn
, struct isert_cmd
*isert_cmd
,
1126 struct ib_send_wr
*send_wr
)
1128 struct iser_tx_desc
*tx_desc
= &isert_cmd
->tx_desc
;
1130 isert_cmd
->rdma_wr
.iser_ib_op
= ISER_IB_SEND
;
1131 send_wr
->wr_id
= (uintptr_t)&isert_cmd
->tx_desc
;
1132 send_wr
->opcode
= IB_WR_SEND
;
1133 send_wr
->sg_list
= &tx_desc
->tx_sg
[0];
1134 send_wr
->num_sge
= isert_cmd
->tx_desc
.num_sge
;
1135 send_wr
->send_flags
= IB_SEND_SIGNALED
;
1139 isert_rdma_post_recvl(struct isert_conn
*isert_conn
)
1141 struct ib_recv_wr rx_wr
, *rx_wr_fail
;
1145 memset(&sge
, 0, sizeof(struct ib_sge
));
1146 sge
.addr
= isert_conn
->login_req_dma
;
1147 sge
.length
= ISER_RX_LOGIN_SIZE
;
1148 sge
.lkey
= isert_conn
->device
->mr
->lkey
;
1150 isert_dbg("Setup sge: addr: %llx length: %d 0x%08x\n",
1151 sge
.addr
, sge
.length
, sge
.lkey
);
1153 memset(&rx_wr
, 0, sizeof(struct ib_recv_wr
));
1154 rx_wr
.wr_id
= (uintptr_t)isert_conn
->login_req_buf
;
1155 rx_wr
.sg_list
= &sge
;
1158 isert_conn
->post_recv_buf_count
++;
1159 ret
= ib_post_recv(isert_conn
->qp
, &rx_wr
, &rx_wr_fail
);
1161 isert_err("ib_post_recv() failed: %d\n", ret
);
1162 isert_conn
->post_recv_buf_count
--;
1169 isert_put_login_tx(struct iscsi_conn
*conn
, struct iscsi_login
*login
,
1172 struct isert_conn
*isert_conn
= conn
->context
;
1173 struct isert_device
*device
= isert_conn
->device
;
1174 struct ib_device
*ib_dev
= device
->ib_device
;
1175 struct iser_tx_desc
*tx_desc
= &isert_conn
->login_tx_desc
;
1178 isert_create_send_desc(isert_conn
, NULL
, tx_desc
);
1180 memcpy(&tx_desc
->iscsi_header
, &login
->rsp
[0],
1181 sizeof(struct iscsi_hdr
));
1183 isert_init_tx_hdrs(isert_conn
, tx_desc
);
1186 struct ib_sge
*tx_dsg
= &tx_desc
->tx_sg
[1];
1188 ib_dma_sync_single_for_cpu(ib_dev
, isert_conn
->login_rsp_dma
,
1189 length
, DMA_TO_DEVICE
);
1191 memcpy(isert_conn
->login_rsp_buf
, login
->rsp_buf
, length
);
1193 ib_dma_sync_single_for_device(ib_dev
, isert_conn
->login_rsp_dma
,
1194 length
, DMA_TO_DEVICE
);
1196 tx_dsg
->addr
= isert_conn
->login_rsp_dma
;
1197 tx_dsg
->length
= length
;
1198 tx_dsg
->lkey
= isert_conn
->device
->mr
->lkey
;
1199 tx_desc
->num_sge
= 2;
1201 if (!login
->login_failed
) {
1202 if (login
->login_complete
) {
1203 if (!conn
->sess
->sess_ops
->SessionType
&&
1204 isert_conn
->device
->use_fastreg
) {
1205 ret
= isert_conn_create_fastreg_pool(isert_conn
);
1207 isert_err("Conn: %p failed to create"
1208 " fastreg pool\n", isert_conn
);
1213 ret
= isert_alloc_rx_descriptors(isert_conn
);
1217 ret
= isert_post_recv(isert_conn
, ISERT_MIN_POSTED_RX
);
1221 /* Now we are in FULL_FEATURE phase */
1222 mutex_lock(&isert_conn
->mutex
);
1223 isert_conn
->state
= ISER_CONN_FULL_FEATURE
;
1224 mutex_unlock(&isert_conn
->mutex
);
1228 ret
= isert_rdma_post_recvl(isert_conn
);
1233 ret
= isert_post_send(isert_conn
, tx_desc
);
1241 isert_rx_login_req(struct isert_conn
*isert_conn
)
1243 struct iser_rx_desc
*rx_desc
= (void *)isert_conn
->login_req_buf
;
1244 int rx_buflen
= isert_conn
->login_req_len
;
1245 struct iscsi_conn
*conn
= isert_conn
->conn
;
1246 struct iscsi_login
*login
= conn
->conn_login
;
1249 isert_info("conn %p\n", isert_conn
);
1251 WARN_ON_ONCE(!login
);
1253 if (login
->first_request
) {
1254 struct iscsi_login_req
*login_req
=
1255 (struct iscsi_login_req
*)&rx_desc
->iscsi_header
;
1257 * Setup the initial iscsi_login values from the leading
1258 * login request PDU.
1260 login
->leading_connection
= (!login_req
->tsih
) ? 1 : 0;
1261 login
->current_stage
=
1262 (login_req
->flags
& ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK
)
1264 login
->version_min
= login_req
->min_version
;
1265 login
->version_max
= login_req
->max_version
;
1266 memcpy(login
->isid
, login_req
->isid
, 6);
1267 login
->cmd_sn
= be32_to_cpu(login_req
->cmdsn
);
1268 login
->init_task_tag
= login_req
->itt
;
1269 login
->initial_exp_statsn
= be32_to_cpu(login_req
->exp_statsn
);
1270 login
->cid
= be16_to_cpu(login_req
->cid
);
1271 login
->tsih
= be16_to_cpu(login_req
->tsih
);
1274 memcpy(&login
->req
[0], (void *)&rx_desc
->iscsi_header
, ISCSI_HDR_LEN
);
1276 size
= min(rx_buflen
, MAX_KEY_VALUE_PAIRS
);
1277 isert_dbg("Using login payload size: %d, rx_buflen: %d "
1278 "MAX_KEY_VALUE_PAIRS: %d\n", size
, rx_buflen
,
1279 MAX_KEY_VALUE_PAIRS
);
1280 memcpy(login
->req_buf
, &rx_desc
->data
[0], size
);
1282 if (login
->first_request
) {
1283 complete(&isert_conn
->login_comp
);
1286 schedule_delayed_work(&conn
->login_work
, 0);
1289 static struct iscsi_cmd
1290 *isert_allocate_cmd(struct iscsi_conn
*conn
)
1292 struct isert_conn
*isert_conn
= conn
->context
;
1293 struct isert_cmd
*isert_cmd
;
1294 struct iscsi_cmd
*cmd
;
1296 cmd
= iscsit_allocate_cmd(conn
, TASK_INTERRUPTIBLE
);
1298 isert_err("Unable to allocate iscsi_cmd + isert_cmd\n");
1301 isert_cmd
= iscsit_priv_cmd(cmd
);
1302 isert_cmd
->conn
= isert_conn
;
1303 isert_cmd
->iscsi_cmd
= cmd
;
1309 isert_handle_scsi_cmd(struct isert_conn
*isert_conn
,
1310 struct isert_cmd
*isert_cmd
, struct iscsi_cmd
*cmd
,
1311 struct iser_rx_desc
*rx_desc
, unsigned char *buf
)
1313 struct iscsi_conn
*conn
= isert_conn
->conn
;
1314 struct iscsi_scsi_req
*hdr
= (struct iscsi_scsi_req
*)buf
;
1315 struct scatterlist
*sg
;
1316 int imm_data
, imm_data_len
, unsol_data
, sg_nents
, rc
;
1317 bool dump_payload
= false;
1319 rc
= iscsit_setup_scsi_cmd(conn
, cmd
, buf
);
1323 imm_data
= cmd
->immediate_data
;
1324 imm_data_len
= cmd
->first_burst_len
;
1325 unsol_data
= cmd
->unsolicited_data
;
1327 rc
= iscsit_process_scsi_cmd(conn
, cmd
, hdr
);
1330 } else if (rc
> 0) {
1331 dump_payload
= true;
1338 sg
= &cmd
->se_cmd
.t_data_sg
[0];
1339 sg_nents
= max(1UL, DIV_ROUND_UP(imm_data_len
, PAGE_SIZE
));
1341 isert_dbg("Copying Immediate SG: %p sg_nents: %u from %p imm_data_len: %d\n",
1342 sg
, sg_nents
, &rx_desc
->data
[0], imm_data_len
);
1344 sg_copy_from_buffer(sg
, sg_nents
, &rx_desc
->data
[0], imm_data_len
);
1346 cmd
->write_data_done
+= imm_data_len
;
1348 if (cmd
->write_data_done
== cmd
->se_cmd
.data_length
) {
1349 spin_lock_bh(&cmd
->istate_lock
);
1350 cmd
->cmd_flags
|= ICF_GOT_LAST_DATAOUT
;
1351 cmd
->i_state
= ISTATE_RECEIVED_LAST_DATAOUT
;
1352 spin_unlock_bh(&cmd
->istate_lock
);
1356 rc
= iscsit_sequence_cmd(conn
, cmd
, buf
, hdr
->cmdsn
);
1358 if (!rc
&& dump_payload
== false && unsol_data
)
1359 iscsit_set_unsoliticed_dataout(cmd
);
1360 else if (dump_payload
&& imm_data
)
1361 target_put_sess_cmd(&cmd
->se_cmd
);
1367 isert_handle_iscsi_dataout(struct isert_conn
*isert_conn
,
1368 struct iser_rx_desc
*rx_desc
, unsigned char *buf
)
1370 struct scatterlist
*sg_start
;
1371 struct iscsi_conn
*conn
= isert_conn
->conn
;
1372 struct iscsi_cmd
*cmd
= NULL
;
1373 struct iscsi_data
*hdr
= (struct iscsi_data
*)buf
;
1374 u32 unsol_data_len
= ntoh24(hdr
->dlength
);
1375 int rc
, sg_nents
, sg_off
, page_off
;
1377 rc
= iscsit_check_dataout_hdr(conn
, buf
, &cmd
);
1383 * FIXME: Unexpected unsolicited_data out
1385 if (!cmd
->unsolicited_data
) {
1386 isert_err("Received unexpected solicited data payload\n");
1391 isert_dbg("Unsolicited DataOut unsol_data_len: %u, "
1392 "write_data_done: %u, data_length: %u\n",
1393 unsol_data_len
, cmd
->write_data_done
,
1394 cmd
->se_cmd
.data_length
);
1396 sg_off
= cmd
->write_data_done
/ PAGE_SIZE
;
1397 sg_start
= &cmd
->se_cmd
.t_data_sg
[sg_off
];
1398 sg_nents
= max(1UL, DIV_ROUND_UP(unsol_data_len
, PAGE_SIZE
));
1399 page_off
= cmd
->write_data_done
% PAGE_SIZE
;
1401 * FIXME: Non page-aligned unsolicited_data out
1404 isert_err("unexpected non-page aligned data payload\n");
1408 isert_dbg("Copying DataOut: sg_start: %p, sg_off: %u "
1409 "sg_nents: %u from %p %u\n", sg_start
, sg_off
,
1410 sg_nents
, &rx_desc
->data
[0], unsol_data_len
);
1412 sg_copy_from_buffer(sg_start
, sg_nents
, &rx_desc
->data
[0],
1415 rc
= iscsit_check_dataout_payload(cmd
, hdr
, false);
1423 isert_handle_nop_out(struct isert_conn
*isert_conn
, struct isert_cmd
*isert_cmd
,
1424 struct iscsi_cmd
*cmd
, struct iser_rx_desc
*rx_desc
,
1427 struct iscsi_conn
*conn
= isert_conn
->conn
;
1428 struct iscsi_nopout
*hdr
= (struct iscsi_nopout
*)buf
;
1431 rc
= iscsit_setup_nop_out(conn
, cmd
, hdr
);
1435 * FIXME: Add support for NOPOUT payload using unsolicited RDMA payload
1438 return iscsit_process_nop_out(conn
, cmd
, hdr
);
1442 isert_handle_text_cmd(struct isert_conn
*isert_conn
, struct isert_cmd
*isert_cmd
,
1443 struct iscsi_cmd
*cmd
, struct iser_rx_desc
*rx_desc
,
1444 struct iscsi_text
*hdr
)
1446 struct iscsi_conn
*conn
= isert_conn
->conn
;
1447 u32 payload_length
= ntoh24(hdr
->dlength
);
1449 unsigned char *text_in
= NULL
;
1451 rc
= iscsit_setup_text_cmd(conn
, cmd
, hdr
);
1455 if (payload_length
) {
1456 text_in
= kzalloc(payload_length
, GFP_KERNEL
);
1458 isert_err("Unable to allocate text_in of payload_length: %u\n",
1463 cmd
->text_in_ptr
= text_in
;
1465 memcpy(cmd
->text_in_ptr
, &rx_desc
->data
[0], payload_length
);
1467 return iscsit_process_text_cmd(conn
, cmd
, hdr
);
1471 isert_rx_opcode(struct isert_conn
*isert_conn
, struct iser_rx_desc
*rx_desc
,
1472 uint32_t read_stag
, uint64_t read_va
,
1473 uint32_t write_stag
, uint64_t write_va
)
1475 struct iscsi_hdr
*hdr
= &rx_desc
->iscsi_header
;
1476 struct iscsi_conn
*conn
= isert_conn
->conn
;
1477 struct iscsi_cmd
*cmd
;
1478 struct isert_cmd
*isert_cmd
;
1480 u8 opcode
= (hdr
->opcode
& ISCSI_OPCODE_MASK
);
1482 if (conn
->sess
->sess_ops
->SessionType
&&
1483 (!(opcode
& ISCSI_OP_TEXT
) || !(opcode
& ISCSI_OP_LOGOUT
))) {
1484 isert_err("Got illegal opcode: 0x%02x in SessionType=Discovery,"
1485 " ignoring\n", opcode
);
1490 case ISCSI_OP_SCSI_CMD
:
1491 cmd
= isert_allocate_cmd(conn
);
1495 isert_cmd
= iscsit_priv_cmd(cmd
);
1496 isert_cmd
->read_stag
= read_stag
;
1497 isert_cmd
->read_va
= read_va
;
1498 isert_cmd
->write_stag
= write_stag
;
1499 isert_cmd
->write_va
= write_va
;
1501 ret
= isert_handle_scsi_cmd(isert_conn
, isert_cmd
, cmd
,
1502 rx_desc
, (unsigned char *)hdr
);
1504 case ISCSI_OP_NOOP_OUT
:
1505 cmd
= isert_allocate_cmd(conn
);
1509 isert_cmd
= iscsit_priv_cmd(cmd
);
1510 ret
= isert_handle_nop_out(isert_conn
, isert_cmd
, cmd
,
1511 rx_desc
, (unsigned char *)hdr
);
1513 case ISCSI_OP_SCSI_DATA_OUT
:
1514 ret
= isert_handle_iscsi_dataout(isert_conn
, rx_desc
,
1515 (unsigned char *)hdr
);
1517 case ISCSI_OP_SCSI_TMFUNC
:
1518 cmd
= isert_allocate_cmd(conn
);
1522 ret
= iscsit_handle_task_mgt_cmd(conn
, cmd
,
1523 (unsigned char *)hdr
);
1525 case ISCSI_OP_LOGOUT
:
1526 cmd
= isert_allocate_cmd(conn
);
1530 ret
= iscsit_handle_logout_cmd(conn
, cmd
, (unsigned char *)hdr
);
1533 if (be32_to_cpu(hdr
->ttt
) != 0xFFFFFFFF) {
1534 cmd
= iscsit_find_cmd_from_itt(conn
, hdr
->itt
);
1538 cmd
= isert_allocate_cmd(conn
);
1543 isert_cmd
= iscsit_priv_cmd(cmd
);
1544 ret
= isert_handle_text_cmd(isert_conn
, isert_cmd
, cmd
,
1545 rx_desc
, (struct iscsi_text
*)hdr
);
1548 isert_err("Got unknown iSCSI OpCode: 0x%02x\n", opcode
);
1557 isert_rx_do_work(struct iser_rx_desc
*rx_desc
, struct isert_conn
*isert_conn
)
1559 struct iser_hdr
*iser_hdr
= &rx_desc
->iser_header
;
1560 uint64_t read_va
= 0, write_va
= 0;
1561 uint32_t read_stag
= 0, write_stag
= 0;
1564 switch (iser_hdr
->flags
& 0xF0) {
1566 if (iser_hdr
->flags
& ISER_RSV
) {
1567 read_stag
= be32_to_cpu(iser_hdr
->read_stag
);
1568 read_va
= be64_to_cpu(iser_hdr
->read_va
);
1569 isert_dbg("ISER_RSV: read_stag: 0x%x read_va: 0x%llx\n",
1570 read_stag
, (unsigned long long)read_va
);
1572 if (iser_hdr
->flags
& ISER_WSV
) {
1573 write_stag
= be32_to_cpu(iser_hdr
->write_stag
);
1574 write_va
= be64_to_cpu(iser_hdr
->write_va
);
1575 isert_dbg("ISER_WSV: write_stag: 0x%x write_va: 0x%llx\n",
1576 write_stag
, (unsigned long long)write_va
);
1579 isert_dbg("ISER ISCSI_CTRL PDU\n");
1582 isert_err("iSER Hello message\n");
1585 isert_warn("Unknown iSER hdr flags: 0x%02x\n", iser_hdr
->flags
);
1589 rc
= isert_rx_opcode(isert_conn
, rx_desc
,
1590 read_stag
, read_va
, write_stag
, write_va
);
1594 isert_rcv_completion(struct iser_rx_desc
*desc
,
1595 struct isert_conn
*isert_conn
,
1598 struct ib_device
*ib_dev
= isert_conn
->cm_id
->device
;
1599 struct iscsi_hdr
*hdr
;
1601 int rx_buflen
, outstanding
;
1603 if ((char *)desc
== isert_conn
->login_req_buf
) {
1604 rx_dma
= isert_conn
->login_req_dma
;
1605 rx_buflen
= ISER_RX_LOGIN_SIZE
;
1606 isert_dbg("login_buf: Using rx_dma: 0x%llx, rx_buflen: %d\n",
1609 rx_dma
= desc
->dma_addr
;
1610 rx_buflen
= ISER_RX_PAYLOAD_SIZE
;
1611 isert_dbg("req_buf: Using rx_dma: 0x%llx, rx_buflen: %d\n",
1615 ib_dma_sync_single_for_cpu(ib_dev
, rx_dma
, rx_buflen
, DMA_FROM_DEVICE
);
1617 hdr
= &desc
->iscsi_header
;
1618 isert_dbg("iSCSI opcode: 0x%02x, ITT: 0x%08x, flags: 0x%02x dlen: %d\n",
1619 hdr
->opcode
, hdr
->itt
, hdr
->flags
,
1620 (int)(xfer_len
- ISER_HEADERS_LEN
));
1622 if ((char *)desc
== isert_conn
->login_req_buf
) {
1623 isert_conn
->login_req_len
= xfer_len
- ISER_HEADERS_LEN
;
1624 if (isert_conn
->conn
) {
1625 struct iscsi_login
*login
= isert_conn
->conn
->conn_login
;
1627 if (login
&& !login
->first_request
)
1628 isert_rx_login_req(isert_conn
);
1630 mutex_lock(&isert_conn
->mutex
);
1631 complete(&isert_conn
->login_req_comp
);
1632 mutex_unlock(&isert_conn
->mutex
);
1634 isert_rx_do_work(desc
, isert_conn
);
1637 ib_dma_sync_single_for_device(ib_dev
, rx_dma
, rx_buflen
,
1640 isert_conn
->post_recv_buf_count
--;
1641 isert_dbg("Decremented post_recv_buf_count: %d\n",
1642 isert_conn
->post_recv_buf_count
);
1644 if ((char *)desc
== isert_conn
->login_req_buf
)
1647 outstanding
= isert_conn
->post_recv_buf_count
;
1648 if (outstanding
+ ISERT_MIN_POSTED_RX
<= ISERT_QP_MAX_RECV_DTOS
) {
1649 int err
, count
= min(ISERT_QP_MAX_RECV_DTOS
- outstanding
,
1650 ISERT_MIN_POSTED_RX
);
1651 err
= isert_post_recv(isert_conn
, count
);
1653 isert_err("isert_post_recv() count: %d failed, %d\n",
1660 isert_map_data_buf(struct isert_conn
*isert_conn
, struct isert_cmd
*isert_cmd
,
1661 struct scatterlist
*sg
, u32 nents
, u32 length
, u32 offset
,
1662 enum iser_ib_op_code op
, struct isert_data_buf
*data
)
1664 struct ib_device
*ib_dev
= isert_conn
->cm_id
->device
;
1666 data
->dma_dir
= op
== ISER_IB_RDMA_WRITE
?
1667 DMA_TO_DEVICE
: DMA_FROM_DEVICE
;
1669 data
->len
= length
- offset
;
1670 data
->offset
= offset
;
1671 data
->sg_off
= data
->offset
/ PAGE_SIZE
;
1673 data
->sg
= &sg
[data
->sg_off
];
1674 data
->nents
= min_t(unsigned int, nents
- data
->sg_off
,
1675 ISCSI_ISER_SG_TABLESIZE
);
1676 data
->len
= min_t(unsigned int, data
->len
, ISCSI_ISER_SG_TABLESIZE
*
1679 data
->dma_nents
= ib_dma_map_sg(ib_dev
, data
->sg
, data
->nents
,
1681 if (unlikely(!data
->dma_nents
)) {
1682 isert_err("Cmd: unable to dma map SGs %p\n", sg
);
1686 isert_dbg("Mapped cmd: %p count: %u sg: %p sg_nents: %u rdma_len %d\n",
1687 isert_cmd
, data
->dma_nents
, data
->sg
, data
->nents
, data
->len
);
1693 isert_unmap_data_buf(struct isert_conn
*isert_conn
, struct isert_data_buf
*data
)
1695 struct ib_device
*ib_dev
= isert_conn
->cm_id
->device
;
1697 ib_dma_unmap_sg(ib_dev
, data
->sg
, data
->nents
, data
->dma_dir
);
1698 memset(data
, 0, sizeof(*data
));
1704 isert_unmap_cmd(struct isert_cmd
*isert_cmd
, struct isert_conn
*isert_conn
)
1706 struct isert_rdma_wr
*wr
= &isert_cmd
->rdma_wr
;
1708 isert_dbg("Cmd %p\n", isert_cmd
);
1711 isert_dbg("Cmd %p unmap_sg op\n", isert_cmd
);
1712 isert_unmap_data_buf(isert_conn
, &wr
->data
);
1716 isert_dbg("Cmd %p free send_wr\n", isert_cmd
);
1722 isert_dbg("Cmd %p free ib_sge\n", isert_cmd
);
1729 isert_unreg_rdma(struct isert_cmd
*isert_cmd
, struct isert_conn
*isert_conn
)
1731 struct isert_rdma_wr
*wr
= &isert_cmd
->rdma_wr
;
1733 isert_dbg("Cmd %p\n", isert_cmd
);
1736 isert_dbg("Cmd %p free fr_desc %p\n", isert_cmd
, wr
->fr_desc
);
1737 if (wr
->fr_desc
->ind
& ISERT_PROTECTED
) {
1738 isert_unmap_data_buf(isert_conn
, &wr
->prot
);
1739 wr
->fr_desc
->ind
&= ~ISERT_PROTECTED
;
1741 spin_lock_bh(&isert_conn
->pool_lock
);
1742 list_add_tail(&wr
->fr_desc
->list
, &isert_conn
->fr_pool
);
1743 spin_unlock_bh(&isert_conn
->pool_lock
);
1748 isert_dbg("Cmd %p unmap_sg op\n", isert_cmd
);
1749 isert_unmap_data_buf(isert_conn
, &wr
->data
);
1757 isert_put_cmd(struct isert_cmd
*isert_cmd
, bool comp_err
)
1759 struct iscsi_cmd
*cmd
= isert_cmd
->iscsi_cmd
;
1760 struct isert_conn
*isert_conn
= isert_cmd
->conn
;
1761 struct iscsi_conn
*conn
= isert_conn
->conn
;
1762 struct isert_device
*device
= isert_conn
->device
;
1763 struct iscsi_text_rsp
*hdr
;
1765 isert_dbg("Cmd %p\n", isert_cmd
);
1767 switch (cmd
->iscsi_opcode
) {
1768 case ISCSI_OP_SCSI_CMD
:
1769 spin_lock_bh(&conn
->cmd_lock
);
1770 if (!list_empty(&cmd
->i_conn_node
))
1771 list_del_init(&cmd
->i_conn_node
);
1772 spin_unlock_bh(&conn
->cmd_lock
);
1774 if (cmd
->data_direction
== DMA_TO_DEVICE
) {
1775 iscsit_stop_dataout_timer(cmd
);
1777 * Check for special case during comp_err where
1778 * WRITE_PENDING has been handed off from core,
1779 * but requires an extra target_put_sess_cmd()
1780 * before transport_generic_free_cmd() below.
1783 cmd
->se_cmd
.t_state
== TRANSPORT_WRITE_PENDING
) {
1784 struct se_cmd
*se_cmd
= &cmd
->se_cmd
;
1786 target_put_sess_cmd(se_cmd
);
1790 device
->unreg_rdma_mem(isert_cmd
, isert_conn
);
1791 transport_generic_free_cmd(&cmd
->se_cmd
, 0);
1793 case ISCSI_OP_SCSI_TMFUNC
:
1794 spin_lock_bh(&conn
->cmd_lock
);
1795 if (!list_empty(&cmd
->i_conn_node
))
1796 list_del_init(&cmd
->i_conn_node
);
1797 spin_unlock_bh(&conn
->cmd_lock
);
1799 transport_generic_free_cmd(&cmd
->se_cmd
, 0);
1801 case ISCSI_OP_REJECT
:
1802 case ISCSI_OP_NOOP_OUT
:
1804 hdr
= (struct iscsi_text_rsp
*)&isert_cmd
->tx_desc
.iscsi_header
;
1805 /* If the continue bit is on, keep the command alive */
1806 if (hdr
->flags
& ISCSI_FLAG_TEXT_CONTINUE
)
1809 spin_lock_bh(&conn
->cmd_lock
);
1810 if (!list_empty(&cmd
->i_conn_node
))
1811 list_del_init(&cmd
->i_conn_node
);
1812 spin_unlock_bh(&conn
->cmd_lock
);
1815 * Handle special case for REJECT when iscsi_add_reject*() has
1816 * overwritten the original iscsi_opcode assignment, and the
1817 * associated cmd->se_cmd needs to be released.
1819 if (cmd
->se_cmd
.se_tfo
!= NULL
) {
1820 isert_dbg("Calling transport_generic_free_cmd for 0x%02x\n",
1822 transport_generic_free_cmd(&cmd
->se_cmd
, 0);
1829 iscsit_release_cmd(cmd
);
1835 isert_unmap_tx_desc(struct iser_tx_desc
*tx_desc
, struct ib_device
*ib_dev
)
1837 if (tx_desc
->dma_addr
!= 0) {
1838 isert_dbg("unmap single for tx_desc->dma_addr\n");
1839 ib_dma_unmap_single(ib_dev
, tx_desc
->dma_addr
,
1840 ISER_HEADERS_LEN
, DMA_TO_DEVICE
);
1841 tx_desc
->dma_addr
= 0;
1846 isert_completion_put(struct iser_tx_desc
*tx_desc
, struct isert_cmd
*isert_cmd
,
1847 struct ib_device
*ib_dev
, bool comp_err
)
1849 if (isert_cmd
->pdu_buf_dma
!= 0) {
1850 isert_dbg("unmap single for isert_cmd->pdu_buf_dma\n");
1851 ib_dma_unmap_single(ib_dev
, isert_cmd
->pdu_buf_dma
,
1852 isert_cmd
->pdu_buf_len
, DMA_TO_DEVICE
);
1853 isert_cmd
->pdu_buf_dma
= 0;
1856 isert_unmap_tx_desc(tx_desc
, ib_dev
);
1857 isert_put_cmd(isert_cmd
, comp_err
);
1861 isert_check_pi_status(struct se_cmd
*se_cmd
, struct ib_mr
*sig_mr
)
1863 struct ib_mr_status mr_status
;
1866 ret
= ib_check_mr_status(sig_mr
, IB_MR_CHECK_SIG_STATUS
, &mr_status
);
1868 isert_err("ib_check_mr_status failed, ret %d\n", ret
);
1869 goto fail_mr_status
;
1872 if (mr_status
.fail_status
& IB_MR_CHECK_SIG_STATUS
) {
1874 u32 block_size
= se_cmd
->se_dev
->dev_attrib
.block_size
+ 8;
1876 switch (mr_status
.sig_err
.err_type
) {
1877 case IB_SIG_BAD_GUARD
:
1878 se_cmd
->pi_err
= TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED
;
1880 case IB_SIG_BAD_REFTAG
:
1881 se_cmd
->pi_err
= TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED
;
1883 case IB_SIG_BAD_APPTAG
:
1884 se_cmd
->pi_err
= TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED
;
1887 sec_offset_err
= mr_status
.sig_err
.sig_err_offset
;
1888 do_div(sec_offset_err
, block_size
);
1889 se_cmd
->bad_sector
= sec_offset_err
+ se_cmd
->t_task_lba
;
1891 isert_err("PI error found type %d at sector 0x%llx "
1892 "expected 0x%x vs actual 0x%x\n",
1893 mr_status
.sig_err
.err_type
,
1894 (unsigned long long)se_cmd
->bad_sector
,
1895 mr_status
.sig_err
.expected
,
1896 mr_status
.sig_err
.actual
);
1905 isert_completion_rdma_write(struct iser_tx_desc
*tx_desc
,
1906 struct isert_cmd
*isert_cmd
)
1908 struct isert_rdma_wr
*wr
= &isert_cmd
->rdma_wr
;
1909 struct iscsi_cmd
*cmd
= isert_cmd
->iscsi_cmd
;
1910 struct se_cmd
*se_cmd
= &cmd
->se_cmd
;
1911 struct isert_conn
*isert_conn
= isert_cmd
->conn
;
1912 struct isert_device
*device
= isert_conn
->device
;
1915 if (wr
->fr_desc
&& wr
->fr_desc
->ind
& ISERT_PROTECTED
) {
1916 ret
= isert_check_pi_status(se_cmd
,
1917 wr
->fr_desc
->pi_ctx
->sig_mr
);
1918 wr
->fr_desc
->ind
&= ~ISERT_PROTECTED
;
1921 device
->unreg_rdma_mem(isert_cmd
, isert_conn
);
1922 wr
->send_wr_num
= 0;
1924 transport_send_check_condition_and_sense(se_cmd
,
1927 isert_put_response(isert_conn
->conn
, cmd
);
1931 isert_completion_rdma_read(struct iser_tx_desc
*tx_desc
,
1932 struct isert_cmd
*isert_cmd
)
1934 struct isert_rdma_wr
*wr
= &isert_cmd
->rdma_wr
;
1935 struct iscsi_cmd
*cmd
= isert_cmd
->iscsi_cmd
;
1936 struct se_cmd
*se_cmd
= &cmd
->se_cmd
;
1937 struct isert_conn
*isert_conn
= isert_cmd
->conn
;
1938 struct isert_device
*device
= isert_conn
->device
;
1941 if (wr
->fr_desc
&& wr
->fr_desc
->ind
& ISERT_PROTECTED
) {
1942 ret
= isert_check_pi_status(se_cmd
,
1943 wr
->fr_desc
->pi_ctx
->sig_mr
);
1944 wr
->fr_desc
->ind
&= ~ISERT_PROTECTED
;
1947 iscsit_stop_dataout_timer(cmd
);
1948 device
->unreg_rdma_mem(isert_cmd
, isert_conn
);
1949 cmd
->write_data_done
= wr
->data
.len
;
1950 wr
->send_wr_num
= 0;
1952 isert_dbg("Cmd: %p RDMA_READ comp calling execute_cmd\n", isert_cmd
);
1953 spin_lock_bh(&cmd
->istate_lock
);
1954 cmd
->cmd_flags
|= ICF_GOT_LAST_DATAOUT
;
1955 cmd
->i_state
= ISTATE_RECEIVED_LAST_DATAOUT
;
1956 spin_unlock_bh(&cmd
->istate_lock
);
1959 target_put_sess_cmd(se_cmd
);
1960 transport_send_check_condition_and_sense(se_cmd
,
1963 target_execute_cmd(se_cmd
);
1968 isert_do_control_comp(struct work_struct
*work
)
1970 struct isert_cmd
*isert_cmd
= container_of(work
,
1971 struct isert_cmd
, comp_work
);
1972 struct isert_conn
*isert_conn
= isert_cmd
->conn
;
1973 struct ib_device
*ib_dev
= isert_conn
->cm_id
->device
;
1974 struct iscsi_cmd
*cmd
= isert_cmd
->iscsi_cmd
;
1976 isert_dbg("Cmd %p i_state %d\n", isert_cmd
, cmd
->i_state
);
1978 switch (cmd
->i_state
) {
1979 case ISTATE_SEND_TASKMGTRSP
:
1980 iscsit_tmr_post_handler(cmd
, cmd
->conn
);
1981 case ISTATE_SEND_REJECT
: /* FALLTHRU */
1982 case ISTATE_SEND_TEXTRSP
: /* FALLTHRU */
1983 cmd
->i_state
= ISTATE_SENT_STATUS
;
1984 isert_completion_put(&isert_cmd
->tx_desc
, isert_cmd
,
1987 case ISTATE_SEND_LOGOUTRSP
:
1988 iscsit_logout_post_handler(cmd
, cmd
->conn
);
1991 isert_err("Unknown i_state %d\n", cmd
->i_state
);
1998 isert_response_completion(struct iser_tx_desc
*tx_desc
,
1999 struct isert_cmd
*isert_cmd
,
2000 struct isert_conn
*isert_conn
,
2001 struct ib_device
*ib_dev
)
2003 struct iscsi_cmd
*cmd
= isert_cmd
->iscsi_cmd
;
2005 if (cmd
->i_state
== ISTATE_SEND_TASKMGTRSP
||
2006 cmd
->i_state
== ISTATE_SEND_LOGOUTRSP
||
2007 cmd
->i_state
== ISTATE_SEND_REJECT
||
2008 cmd
->i_state
== ISTATE_SEND_TEXTRSP
) {
2009 isert_unmap_tx_desc(tx_desc
, ib_dev
);
2011 INIT_WORK(&isert_cmd
->comp_work
, isert_do_control_comp
);
2012 queue_work(isert_comp_wq
, &isert_cmd
->comp_work
);
2016 cmd
->i_state
= ISTATE_SENT_STATUS
;
2017 isert_completion_put(tx_desc
, isert_cmd
, ib_dev
, false);
2021 isert_snd_completion(struct iser_tx_desc
*tx_desc
,
2022 struct isert_conn
*isert_conn
)
2024 struct ib_device
*ib_dev
= isert_conn
->cm_id
->device
;
2025 struct isert_cmd
*isert_cmd
= tx_desc
->isert_cmd
;
2026 struct isert_rdma_wr
*wr
;
2029 isert_unmap_tx_desc(tx_desc
, ib_dev
);
2032 wr
= &isert_cmd
->rdma_wr
;
2034 isert_dbg("Cmd %p iser_ib_op %d\n", isert_cmd
, wr
->iser_ib_op
);
2036 switch (wr
->iser_ib_op
) {
2038 isert_response_completion(tx_desc
, isert_cmd
,
2039 isert_conn
, ib_dev
);
2041 case ISER_IB_RDMA_WRITE
:
2042 isert_completion_rdma_write(tx_desc
, isert_cmd
);
2044 case ISER_IB_RDMA_READ
:
2045 isert_completion_rdma_read(tx_desc
, isert_cmd
);
2048 isert_err("Unknown wr->iser_ib_op: 0x%x\n", wr
->iser_ib_op
);
2055 * is_isert_tx_desc() - Indicate if the completion wr_id
2056 * is a TX descriptor or not.
2057 * @isert_conn: iser connection
2058 * @wr_id: completion WR identifier
2060 * Since we cannot rely on wc opcode in FLUSH errors
2061 * we must work around it by checking if the wr_id address
2062 * falls in the iser connection rx_descs buffer. If so
2063 * it is an RX descriptor, otherwize it is a TX.
2066 is_isert_tx_desc(struct isert_conn
*isert_conn
, void *wr_id
)
2068 void *start
= isert_conn
->rx_descs
;
2069 int len
= ISERT_QP_MAX_RECV_DTOS
* sizeof(*isert_conn
->rx_descs
);
2071 if (wr_id
>= start
&& wr_id
< start
+ len
)
2078 isert_cq_comp_err(struct isert_conn
*isert_conn
, struct ib_wc
*wc
)
2080 if (wc
->wr_id
== ISER_BEACON_WRID
) {
2081 isert_info("conn %p completing wait_comp_err\n",
2083 complete(&isert_conn
->wait_comp_err
);
2084 } else if (is_isert_tx_desc(isert_conn
, (void *)(uintptr_t)wc
->wr_id
)) {
2085 struct ib_device
*ib_dev
= isert_conn
->cm_id
->device
;
2086 struct isert_cmd
*isert_cmd
;
2087 struct iser_tx_desc
*desc
;
2089 desc
= (struct iser_tx_desc
*)(uintptr_t)wc
->wr_id
;
2090 isert_cmd
= desc
->isert_cmd
;
2092 isert_unmap_tx_desc(desc
, ib_dev
);
2094 isert_completion_put(desc
, isert_cmd
, ib_dev
, true);
2096 isert_conn
->post_recv_buf_count
--;
2097 if (!isert_conn
->post_recv_buf_count
)
2098 iscsit_cause_connection_reinstatement(isert_conn
->conn
, 0);
2103 isert_handle_wc(struct ib_wc
*wc
)
2105 struct isert_conn
*isert_conn
;
2106 struct iser_tx_desc
*tx_desc
;
2107 struct iser_rx_desc
*rx_desc
;
2109 isert_conn
= wc
->qp
->qp_context
;
2110 if (likely(wc
->status
== IB_WC_SUCCESS
)) {
2111 if (wc
->opcode
== IB_WC_RECV
) {
2112 rx_desc
= (struct iser_rx_desc
*)(uintptr_t)wc
->wr_id
;
2113 isert_rcv_completion(rx_desc
, isert_conn
, wc
->byte_len
);
2115 tx_desc
= (struct iser_tx_desc
*)(uintptr_t)wc
->wr_id
;
2116 isert_snd_completion(tx_desc
, isert_conn
);
2119 if (wc
->status
!= IB_WC_WR_FLUSH_ERR
)
2120 isert_err("%s (%d): wr id %llx vend_err %x\n",
2121 ib_wc_status_msg(wc
->status
), wc
->status
,
2122 wc
->wr_id
, wc
->vendor_err
);
2124 isert_dbg("%s (%d): wr id %llx\n",
2125 ib_wc_status_msg(wc
->status
), wc
->status
,
2128 if (wc
->wr_id
!= ISER_FASTREG_LI_WRID
)
2129 isert_cq_comp_err(isert_conn
, wc
);
2134 isert_cq_work(struct work_struct
*work
)
2136 enum { isert_poll_budget
= 65536 };
2137 struct isert_comp
*comp
= container_of(work
, struct isert_comp
,
2139 struct ib_wc
*const wcs
= comp
->wcs
;
2140 int i
, n
, completed
= 0;
2142 while ((n
= ib_poll_cq(comp
->cq
, ARRAY_SIZE(comp
->wcs
), wcs
)) > 0) {
2143 for (i
= 0; i
< n
; i
++)
2144 isert_handle_wc(&wcs
[i
]);
2147 if (completed
>= isert_poll_budget
)
2151 ib_req_notify_cq(comp
->cq
, IB_CQ_NEXT_COMP
);
2155 isert_cq_callback(struct ib_cq
*cq
, void *context
)
2157 struct isert_comp
*comp
= context
;
2159 queue_work(isert_comp_wq
, &comp
->work
);
2163 isert_post_response(struct isert_conn
*isert_conn
, struct isert_cmd
*isert_cmd
)
2165 struct ib_send_wr
*wr_failed
;
2168 ret
= ib_post_send(isert_conn
->qp
, &isert_cmd
->tx_desc
.send_wr
,
2171 isert_err("ib_post_send failed with %d\n", ret
);
2178 isert_put_response(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
)
2180 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
2181 struct isert_conn
*isert_conn
= conn
->context
;
2182 struct ib_send_wr
*send_wr
= &isert_cmd
->tx_desc
.send_wr
;
2183 struct iscsi_scsi_rsp
*hdr
= (struct iscsi_scsi_rsp
*)
2184 &isert_cmd
->tx_desc
.iscsi_header
;
2186 isert_create_send_desc(isert_conn
, isert_cmd
, &isert_cmd
->tx_desc
);
2187 iscsit_build_rsp_pdu(cmd
, conn
, true, hdr
);
2188 isert_init_tx_hdrs(isert_conn
, &isert_cmd
->tx_desc
);
2190 * Attach SENSE DATA payload to iSCSI Response PDU
2192 if (cmd
->se_cmd
.sense_buffer
&&
2193 ((cmd
->se_cmd
.se_cmd_flags
& SCF_TRANSPORT_TASK_SENSE
) ||
2194 (cmd
->se_cmd
.se_cmd_flags
& SCF_EMULATED_TASK_SENSE
))) {
2195 struct isert_device
*device
= isert_conn
->device
;
2196 struct ib_device
*ib_dev
= device
->ib_device
;
2197 struct ib_sge
*tx_dsg
= &isert_cmd
->tx_desc
.tx_sg
[1];
2198 u32 padding
, pdu_len
;
2200 put_unaligned_be16(cmd
->se_cmd
.scsi_sense_length
,
2202 cmd
->se_cmd
.scsi_sense_length
+= sizeof(__be16
);
2204 padding
= -(cmd
->se_cmd
.scsi_sense_length
) & 3;
2205 hton24(hdr
->dlength
, (u32
)cmd
->se_cmd
.scsi_sense_length
);
2206 pdu_len
= cmd
->se_cmd
.scsi_sense_length
+ padding
;
2208 isert_cmd
->pdu_buf_dma
= ib_dma_map_single(ib_dev
,
2209 (void *)cmd
->sense_buffer
, pdu_len
,
2212 isert_cmd
->pdu_buf_len
= pdu_len
;
2213 tx_dsg
->addr
= isert_cmd
->pdu_buf_dma
;
2214 tx_dsg
->length
= pdu_len
;
2215 tx_dsg
->lkey
= device
->mr
->lkey
;
2216 isert_cmd
->tx_desc
.num_sge
= 2;
2219 isert_init_send_wr(isert_conn
, isert_cmd
, send_wr
);
2221 isert_dbg("Posting SCSI Response\n");
2223 return isert_post_response(isert_conn
, isert_cmd
);
2227 isert_aborted_task(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
)
2229 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
2230 struct isert_conn
*isert_conn
= conn
->context
;
2231 struct isert_device
*device
= isert_conn
->device
;
2233 spin_lock_bh(&conn
->cmd_lock
);
2234 if (!list_empty(&cmd
->i_conn_node
))
2235 list_del_init(&cmd
->i_conn_node
);
2236 spin_unlock_bh(&conn
->cmd_lock
);
2238 if (cmd
->data_direction
== DMA_TO_DEVICE
)
2239 iscsit_stop_dataout_timer(cmd
);
2241 device
->unreg_rdma_mem(isert_cmd
, isert_conn
);
2244 static enum target_prot_op
2245 isert_get_sup_prot_ops(struct iscsi_conn
*conn
)
2247 struct isert_conn
*isert_conn
= conn
->context
;
2248 struct isert_device
*device
= isert_conn
->device
;
2250 if (conn
->tpg
->tpg_attrib
.t10_pi
) {
2251 if (device
->pi_capable
) {
2252 isert_info("conn %p PI offload enabled\n", isert_conn
);
2253 isert_conn
->pi_support
= true;
2254 return TARGET_PROT_ALL
;
2258 isert_info("conn %p PI offload disabled\n", isert_conn
);
2259 isert_conn
->pi_support
= false;
2261 return TARGET_PROT_NORMAL
;
2265 isert_put_nopin(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
,
2266 bool nopout_response
)
2268 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
2269 struct isert_conn
*isert_conn
= conn
->context
;
2270 struct ib_send_wr
*send_wr
= &isert_cmd
->tx_desc
.send_wr
;
2272 isert_create_send_desc(isert_conn
, isert_cmd
, &isert_cmd
->tx_desc
);
2273 iscsit_build_nopin_rsp(cmd
, conn
, (struct iscsi_nopin
*)
2274 &isert_cmd
->tx_desc
.iscsi_header
,
2276 isert_init_tx_hdrs(isert_conn
, &isert_cmd
->tx_desc
);
2277 isert_init_send_wr(isert_conn
, isert_cmd
, send_wr
);
2279 isert_dbg("conn %p Posting NOPIN Response\n", isert_conn
);
2281 return isert_post_response(isert_conn
, isert_cmd
);
2285 isert_put_logout_rsp(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
2287 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
2288 struct isert_conn
*isert_conn
= conn
->context
;
2289 struct ib_send_wr
*send_wr
= &isert_cmd
->tx_desc
.send_wr
;
2291 isert_create_send_desc(isert_conn
, isert_cmd
, &isert_cmd
->tx_desc
);
2292 iscsit_build_logout_rsp(cmd
, conn
, (struct iscsi_logout_rsp
*)
2293 &isert_cmd
->tx_desc
.iscsi_header
);
2294 isert_init_tx_hdrs(isert_conn
, &isert_cmd
->tx_desc
);
2295 isert_init_send_wr(isert_conn
, isert_cmd
, send_wr
);
2297 isert_dbg("conn %p Posting Logout Response\n", isert_conn
);
2299 return isert_post_response(isert_conn
, isert_cmd
);
2303 isert_put_tm_rsp(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
2305 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
2306 struct isert_conn
*isert_conn
= conn
->context
;
2307 struct ib_send_wr
*send_wr
= &isert_cmd
->tx_desc
.send_wr
;
2309 isert_create_send_desc(isert_conn
, isert_cmd
, &isert_cmd
->tx_desc
);
2310 iscsit_build_task_mgt_rsp(cmd
, conn
, (struct iscsi_tm_rsp
*)
2311 &isert_cmd
->tx_desc
.iscsi_header
);
2312 isert_init_tx_hdrs(isert_conn
, &isert_cmd
->tx_desc
);
2313 isert_init_send_wr(isert_conn
, isert_cmd
, send_wr
);
2315 isert_dbg("conn %p Posting Task Management Response\n", isert_conn
);
2317 return isert_post_response(isert_conn
, isert_cmd
);
2321 isert_put_reject(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
2323 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
2324 struct isert_conn
*isert_conn
= conn
->context
;
2325 struct ib_send_wr
*send_wr
= &isert_cmd
->tx_desc
.send_wr
;
2326 struct isert_device
*device
= isert_conn
->device
;
2327 struct ib_device
*ib_dev
= device
->ib_device
;
2328 struct ib_sge
*tx_dsg
= &isert_cmd
->tx_desc
.tx_sg
[1];
2329 struct iscsi_reject
*hdr
=
2330 (struct iscsi_reject
*)&isert_cmd
->tx_desc
.iscsi_header
;
2332 isert_create_send_desc(isert_conn
, isert_cmd
, &isert_cmd
->tx_desc
);
2333 iscsit_build_reject(cmd
, conn
, hdr
);
2334 isert_init_tx_hdrs(isert_conn
, &isert_cmd
->tx_desc
);
2336 hton24(hdr
->dlength
, ISCSI_HDR_LEN
);
2337 isert_cmd
->pdu_buf_dma
= ib_dma_map_single(ib_dev
,
2338 (void *)cmd
->buf_ptr
, ISCSI_HDR_LEN
,
2340 isert_cmd
->pdu_buf_len
= ISCSI_HDR_LEN
;
2341 tx_dsg
->addr
= isert_cmd
->pdu_buf_dma
;
2342 tx_dsg
->length
= ISCSI_HDR_LEN
;
2343 tx_dsg
->lkey
= device
->mr
->lkey
;
2344 isert_cmd
->tx_desc
.num_sge
= 2;
2346 isert_init_send_wr(isert_conn
, isert_cmd
, send_wr
);
2348 isert_dbg("conn %p Posting Reject\n", isert_conn
);
2350 return isert_post_response(isert_conn
, isert_cmd
);
2354 isert_put_text_rsp(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
2356 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
2357 struct isert_conn
*isert_conn
= conn
->context
;
2358 struct ib_send_wr
*send_wr
= &isert_cmd
->tx_desc
.send_wr
;
2359 struct iscsi_text_rsp
*hdr
=
2360 (struct iscsi_text_rsp
*)&isert_cmd
->tx_desc
.iscsi_header
;
2364 isert_create_send_desc(isert_conn
, isert_cmd
, &isert_cmd
->tx_desc
);
2365 rc
= iscsit_build_text_rsp(cmd
, conn
, hdr
, ISCSI_INFINIBAND
);
2370 isert_init_tx_hdrs(isert_conn
, &isert_cmd
->tx_desc
);
2373 struct isert_device
*device
= isert_conn
->device
;
2374 struct ib_device
*ib_dev
= device
->ib_device
;
2375 struct ib_sge
*tx_dsg
= &isert_cmd
->tx_desc
.tx_sg
[1];
2376 void *txt_rsp_buf
= cmd
->buf_ptr
;
2378 isert_cmd
->pdu_buf_dma
= ib_dma_map_single(ib_dev
,
2379 txt_rsp_buf
, txt_rsp_len
, DMA_TO_DEVICE
);
2381 isert_cmd
->pdu_buf_len
= txt_rsp_len
;
2382 tx_dsg
->addr
= isert_cmd
->pdu_buf_dma
;
2383 tx_dsg
->length
= txt_rsp_len
;
2384 tx_dsg
->lkey
= device
->mr
->lkey
;
2385 isert_cmd
->tx_desc
.num_sge
= 2;
2387 isert_init_send_wr(isert_conn
, isert_cmd
, send_wr
);
2389 isert_dbg("conn %p Text Response\n", isert_conn
);
2391 return isert_post_response(isert_conn
, isert_cmd
);
2395 isert_build_rdma_wr(struct isert_conn
*isert_conn
, struct isert_cmd
*isert_cmd
,
2396 struct ib_sge
*ib_sge
, struct ib_send_wr
*send_wr
,
2397 u32 data_left
, u32 offset
)
2399 struct iscsi_cmd
*cmd
= isert_cmd
->iscsi_cmd
;
2400 struct scatterlist
*sg_start
, *tmp_sg
;
2401 struct isert_device
*device
= isert_conn
->device
;
2402 struct ib_device
*ib_dev
= device
->ib_device
;
2403 u32 sg_off
, page_off
;
2404 int i
= 0, sg_nents
;
2406 sg_off
= offset
/ PAGE_SIZE
;
2407 sg_start
= &cmd
->se_cmd
.t_data_sg
[sg_off
];
2408 sg_nents
= min(cmd
->se_cmd
.t_data_nents
- sg_off
, isert_conn
->max_sge
);
2409 page_off
= offset
% PAGE_SIZE
;
2411 send_wr
->sg_list
= ib_sge
;
2412 send_wr
->wr_id
= (uintptr_t)&isert_cmd
->tx_desc
;
2414 * Perform mapping of TCM scatterlist memory ib_sge dma_addr.
2416 for_each_sg(sg_start
, tmp_sg
, sg_nents
, i
) {
2417 isert_dbg("RDMA from SGL dma_addr: 0x%llx dma_len: %u, "
2419 (unsigned long long)tmp_sg
->dma_address
,
2420 tmp_sg
->length
, page_off
);
2422 ib_sge
->addr
= ib_sg_dma_address(ib_dev
, tmp_sg
) + page_off
;
2423 ib_sge
->length
= min_t(u32
, data_left
,
2424 ib_sg_dma_len(ib_dev
, tmp_sg
) - page_off
);
2425 ib_sge
->lkey
= device
->mr
->lkey
;
2427 isert_dbg("RDMA ib_sge: addr: 0x%llx length: %u lkey: %x\n",
2428 ib_sge
->addr
, ib_sge
->length
, ib_sge
->lkey
);
2430 data_left
-= ib_sge
->length
;
2434 isert_dbg("Incrementing ib_sge pointer to %p\n", ib_sge
);
2437 send_wr
->num_sge
= ++i
;
2438 isert_dbg("Set outgoing sg_list: %p num_sg: %u from TCM SGLs\n",
2439 send_wr
->sg_list
, send_wr
->num_sge
);
2441 return send_wr
->num_sge
;
2445 isert_map_rdma(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
2446 struct isert_rdma_wr
*wr
)
2448 struct se_cmd
*se_cmd
= &cmd
->se_cmd
;
2449 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
2450 struct isert_conn
*isert_conn
= conn
->context
;
2451 struct isert_data_buf
*data
= &wr
->data
;
2452 struct ib_send_wr
*send_wr
;
2453 struct ib_sge
*ib_sge
;
2454 u32 offset
, data_len
, data_left
, rdma_write_max
, va_offset
= 0;
2455 int ret
= 0, i
, ib_sge_cnt
;
2457 isert_cmd
->tx_desc
.isert_cmd
= isert_cmd
;
2459 offset
= wr
->iser_ib_op
== ISER_IB_RDMA_READ
? cmd
->write_data_done
: 0;
2460 ret
= isert_map_data_buf(isert_conn
, isert_cmd
, se_cmd
->t_data_sg
,
2461 se_cmd
->t_data_nents
, se_cmd
->data_length
,
2462 offset
, wr
->iser_ib_op
, &wr
->data
);
2466 data_left
= data
->len
;
2467 offset
= data
->offset
;
2469 ib_sge
= kzalloc(sizeof(struct ib_sge
) * data
->nents
, GFP_KERNEL
);
2471 isert_warn("Unable to allocate ib_sge\n");
2475 wr
->ib_sge
= ib_sge
;
2477 wr
->send_wr_num
= DIV_ROUND_UP(data
->nents
, isert_conn
->max_sge
);
2478 wr
->send_wr
= kzalloc(sizeof(struct ib_send_wr
) * wr
->send_wr_num
,
2481 isert_dbg("Unable to allocate wr->send_wr\n");
2486 wr
->isert_cmd
= isert_cmd
;
2487 rdma_write_max
= isert_conn
->max_sge
* PAGE_SIZE
;
2489 for (i
= 0; i
< wr
->send_wr_num
; i
++) {
2490 send_wr
= &isert_cmd
->rdma_wr
.send_wr
[i
];
2491 data_len
= min(data_left
, rdma_write_max
);
2493 send_wr
->send_flags
= 0;
2494 if (wr
->iser_ib_op
== ISER_IB_RDMA_WRITE
) {
2495 send_wr
->opcode
= IB_WR_RDMA_WRITE
;
2496 send_wr
->wr
.rdma
.remote_addr
= isert_cmd
->read_va
+ offset
;
2497 send_wr
->wr
.rdma
.rkey
= isert_cmd
->read_stag
;
2498 if (i
+ 1 == wr
->send_wr_num
)
2499 send_wr
->next
= &isert_cmd
->tx_desc
.send_wr
;
2501 send_wr
->next
= &wr
->send_wr
[i
+ 1];
2503 send_wr
->opcode
= IB_WR_RDMA_READ
;
2504 send_wr
->wr
.rdma
.remote_addr
= isert_cmd
->write_va
+ va_offset
;
2505 send_wr
->wr
.rdma
.rkey
= isert_cmd
->write_stag
;
2506 if (i
+ 1 == wr
->send_wr_num
)
2507 send_wr
->send_flags
= IB_SEND_SIGNALED
;
2509 send_wr
->next
= &wr
->send_wr
[i
+ 1];
2512 ib_sge_cnt
= isert_build_rdma_wr(isert_conn
, isert_cmd
, ib_sge
,
2513 send_wr
, data_len
, offset
);
2514 ib_sge
+= ib_sge_cnt
;
2517 va_offset
+= data_len
;
2518 data_left
-= data_len
;
2523 isert_unmap_data_buf(isert_conn
, data
);
2529 isert_map_fr_pagelist(struct ib_device
*ib_dev
,
2530 struct scatterlist
*sg_start
, int sg_nents
, u64
*fr_pl
)
2532 u64 start_addr
, end_addr
, page
, chunk_start
= 0;
2533 struct scatterlist
*tmp_sg
;
2534 int i
= 0, new_chunk
, last_ent
, n_pages
;
2538 last_ent
= sg_nents
- 1;
2539 for_each_sg(sg_start
, tmp_sg
, sg_nents
, i
) {
2540 start_addr
= ib_sg_dma_address(ib_dev
, tmp_sg
);
2542 chunk_start
= start_addr
;
2543 end_addr
= start_addr
+ ib_sg_dma_len(ib_dev
, tmp_sg
);
2545 isert_dbg("SGL[%d] dma_addr: 0x%llx len: %u\n",
2546 i
, (unsigned long long)tmp_sg
->dma_address
,
2549 if ((end_addr
& ~PAGE_MASK
) && i
< last_ent
) {
2555 page
= chunk_start
& PAGE_MASK
;
2557 fr_pl
[n_pages
++] = page
;
2558 isert_dbg("Mapped page_list[%d] page_addr: 0x%llx\n",
2561 } while (page
< end_addr
);
2568 isert_inv_rkey(struct ib_send_wr
*inv_wr
, struct ib_mr
*mr
)
2572 memset(inv_wr
, 0, sizeof(*inv_wr
));
2573 inv_wr
->wr_id
= ISER_FASTREG_LI_WRID
;
2574 inv_wr
->opcode
= IB_WR_LOCAL_INV
;
2575 inv_wr
->ex
.invalidate_rkey
= mr
->rkey
;
2578 rkey
= ib_inc_rkey(mr
->rkey
);
2579 ib_update_fast_reg_key(mr
, rkey
);
2583 isert_fast_reg_mr(struct isert_conn
*isert_conn
,
2584 struct fast_reg_descriptor
*fr_desc
,
2585 struct isert_data_buf
*mem
,
2586 enum isert_indicator ind
,
2589 struct isert_device
*device
= isert_conn
->device
;
2590 struct ib_device
*ib_dev
= device
->ib_device
;
2592 struct ib_fast_reg_page_list
*frpl
;
2593 struct ib_send_wr fr_wr
, inv_wr
;
2594 struct ib_send_wr
*bad_wr
, *wr
= NULL
;
2595 int ret
, pagelist_len
;
2598 if (mem
->dma_nents
== 1) {
2599 sge
->lkey
= device
->mr
->lkey
;
2600 sge
->addr
= ib_sg_dma_address(ib_dev
, &mem
->sg
[0]);
2601 sge
->length
= ib_sg_dma_len(ib_dev
, &mem
->sg
[0]);
2602 isert_dbg("sge: addr: 0x%llx length: %u lkey: %x\n",
2603 sge
->addr
, sge
->length
, sge
->lkey
);
2607 if (ind
== ISERT_DATA_KEY_VALID
) {
2608 /* Registering data buffer */
2609 mr
= fr_desc
->data_mr
;
2610 frpl
= fr_desc
->data_frpl
;
2612 /* Registering protection buffer */
2613 mr
= fr_desc
->pi_ctx
->prot_mr
;
2614 frpl
= fr_desc
->pi_ctx
->prot_frpl
;
2617 page_off
= mem
->offset
% PAGE_SIZE
;
2619 isert_dbg("Use fr_desc %p sg_nents %d offset %u\n",
2620 fr_desc
, mem
->nents
, mem
->offset
);
2622 pagelist_len
= isert_map_fr_pagelist(ib_dev
, mem
->sg
, mem
->nents
,
2623 &frpl
->page_list
[0]);
2625 if (!(fr_desc
->ind
& ind
)) {
2626 isert_inv_rkey(&inv_wr
, mr
);
2630 /* Prepare FASTREG WR */
2631 memset(&fr_wr
, 0, sizeof(fr_wr
));
2632 fr_wr
.wr_id
= ISER_FASTREG_LI_WRID
;
2633 fr_wr
.opcode
= IB_WR_FAST_REG_MR
;
2634 fr_wr
.wr
.fast_reg
.iova_start
= frpl
->page_list
[0] + page_off
;
2635 fr_wr
.wr
.fast_reg
.page_list
= frpl
;
2636 fr_wr
.wr
.fast_reg
.page_list_len
= pagelist_len
;
2637 fr_wr
.wr
.fast_reg
.page_shift
= PAGE_SHIFT
;
2638 fr_wr
.wr
.fast_reg
.length
= mem
->len
;
2639 fr_wr
.wr
.fast_reg
.rkey
= mr
->rkey
;
2640 fr_wr
.wr
.fast_reg
.access_flags
= IB_ACCESS_LOCAL_WRITE
;
2647 ret
= ib_post_send(isert_conn
->qp
, wr
, &bad_wr
);
2649 isert_err("fast registration failed, ret:%d\n", ret
);
2652 fr_desc
->ind
&= ~ind
;
2654 sge
->lkey
= mr
->lkey
;
2655 sge
->addr
= frpl
->page_list
[0] + page_off
;
2656 sge
->length
= mem
->len
;
2658 isert_dbg("sge: addr: 0x%llx length: %u lkey: %x\n",
2659 sge
->addr
, sge
->length
, sge
->lkey
);
2665 isert_set_dif_domain(struct se_cmd
*se_cmd
, struct ib_sig_attrs
*sig_attrs
,
2666 struct ib_sig_domain
*domain
)
2668 domain
->sig_type
= IB_SIG_TYPE_T10_DIF
;
2669 domain
->sig
.dif
.bg_type
= IB_T10DIF_CRC
;
2670 domain
->sig
.dif
.pi_interval
= se_cmd
->se_dev
->dev_attrib
.block_size
;
2671 domain
->sig
.dif
.ref_tag
= se_cmd
->reftag_seed
;
2673 * At the moment we hard code those, but if in the future
2674 * the target core would like to use it, we will take it
2677 domain
->sig
.dif
.apptag_check_mask
= 0xffff;
2678 domain
->sig
.dif
.app_escape
= true;
2679 domain
->sig
.dif
.ref_escape
= true;
2680 if (se_cmd
->prot_type
== TARGET_DIF_TYPE1_PROT
||
2681 se_cmd
->prot_type
== TARGET_DIF_TYPE2_PROT
)
2682 domain
->sig
.dif
.ref_remap
= true;
2686 isert_set_sig_attrs(struct se_cmd
*se_cmd
, struct ib_sig_attrs
*sig_attrs
)
2688 switch (se_cmd
->prot_op
) {
2689 case TARGET_PROT_DIN_INSERT
:
2690 case TARGET_PROT_DOUT_STRIP
:
2691 sig_attrs
->mem
.sig_type
= IB_SIG_TYPE_NONE
;
2692 isert_set_dif_domain(se_cmd
, sig_attrs
, &sig_attrs
->wire
);
2694 case TARGET_PROT_DOUT_INSERT
:
2695 case TARGET_PROT_DIN_STRIP
:
2696 sig_attrs
->wire
.sig_type
= IB_SIG_TYPE_NONE
;
2697 isert_set_dif_domain(se_cmd
, sig_attrs
, &sig_attrs
->mem
);
2699 case TARGET_PROT_DIN_PASS
:
2700 case TARGET_PROT_DOUT_PASS
:
2701 isert_set_dif_domain(se_cmd
, sig_attrs
, &sig_attrs
->wire
);
2702 isert_set_dif_domain(se_cmd
, sig_attrs
, &sig_attrs
->mem
);
2705 isert_err("Unsupported PI operation %d\n", se_cmd
->prot_op
);
2713 isert_set_prot_checks(u8 prot_checks
)
2715 return (prot_checks
& TARGET_DIF_CHECK_GUARD
? 0xc0 : 0) |
2716 (prot_checks
& TARGET_DIF_CHECK_REFTAG
? 0x30 : 0) |
2717 (prot_checks
& TARGET_DIF_CHECK_REFTAG
? 0x0f : 0);
2721 isert_reg_sig_mr(struct isert_conn
*isert_conn
,
2722 struct se_cmd
*se_cmd
,
2723 struct isert_rdma_wr
*rdma_wr
,
2724 struct fast_reg_descriptor
*fr_desc
)
2726 struct ib_send_wr sig_wr
, inv_wr
;
2727 struct ib_send_wr
*bad_wr
, *wr
= NULL
;
2728 struct pi_context
*pi_ctx
= fr_desc
->pi_ctx
;
2729 struct ib_sig_attrs sig_attrs
;
2732 memset(&sig_attrs
, 0, sizeof(sig_attrs
));
2733 ret
= isert_set_sig_attrs(se_cmd
, &sig_attrs
);
2737 sig_attrs
.check_mask
= isert_set_prot_checks(se_cmd
->prot_checks
);
2739 if (!(fr_desc
->ind
& ISERT_SIG_KEY_VALID
)) {
2740 isert_inv_rkey(&inv_wr
, pi_ctx
->sig_mr
);
2744 memset(&sig_wr
, 0, sizeof(sig_wr
));
2745 sig_wr
.opcode
= IB_WR_REG_SIG_MR
;
2746 sig_wr
.wr_id
= ISER_FASTREG_LI_WRID
;
2747 sig_wr
.sg_list
= &rdma_wr
->ib_sg
[DATA
];
2749 sig_wr
.wr
.sig_handover
.access_flags
= IB_ACCESS_LOCAL_WRITE
;
2750 sig_wr
.wr
.sig_handover
.sig_attrs
= &sig_attrs
;
2751 sig_wr
.wr
.sig_handover
.sig_mr
= pi_ctx
->sig_mr
;
2752 if (se_cmd
->t_prot_sg
)
2753 sig_wr
.wr
.sig_handover
.prot
= &rdma_wr
->ib_sg
[PROT
];
2760 ret
= ib_post_send(isert_conn
->qp
, wr
, &bad_wr
);
2762 isert_err("fast registration failed, ret:%d\n", ret
);
2765 fr_desc
->ind
&= ~ISERT_SIG_KEY_VALID
;
2767 rdma_wr
->ib_sg
[SIG
].lkey
= pi_ctx
->sig_mr
->lkey
;
2768 rdma_wr
->ib_sg
[SIG
].addr
= 0;
2769 rdma_wr
->ib_sg
[SIG
].length
= se_cmd
->data_length
;
2770 if (se_cmd
->prot_op
!= TARGET_PROT_DIN_STRIP
&&
2771 se_cmd
->prot_op
!= TARGET_PROT_DOUT_INSERT
)
2773 * We have protection guards on the wire
2774 * so we need to set a larget transfer
2776 rdma_wr
->ib_sg
[SIG
].length
+= se_cmd
->prot_length
;
2778 isert_dbg("sig_sge: addr: 0x%llx length: %u lkey: %x\n",
2779 rdma_wr
->ib_sg
[SIG
].addr
, rdma_wr
->ib_sg
[SIG
].length
,
2780 rdma_wr
->ib_sg
[SIG
].lkey
);
2786 isert_handle_prot_cmd(struct isert_conn
*isert_conn
,
2787 struct isert_cmd
*isert_cmd
,
2788 struct isert_rdma_wr
*wr
)
2790 struct isert_device
*device
= isert_conn
->device
;
2791 struct se_cmd
*se_cmd
= &isert_cmd
->iscsi_cmd
->se_cmd
;
2794 if (!wr
->fr_desc
->pi_ctx
) {
2795 ret
= isert_create_pi_ctx(wr
->fr_desc
,
2799 isert_err("conn %p failed to allocate pi_ctx\n",
2805 if (se_cmd
->t_prot_sg
) {
2806 ret
= isert_map_data_buf(isert_conn
, isert_cmd
,
2808 se_cmd
->t_prot_nents
,
2809 se_cmd
->prot_length
,
2810 0, wr
->iser_ib_op
, &wr
->prot
);
2812 isert_err("conn %p failed to map protection buffer\n",
2817 memset(&wr
->ib_sg
[PROT
], 0, sizeof(wr
->ib_sg
[PROT
]));
2818 ret
= isert_fast_reg_mr(isert_conn
, wr
->fr_desc
, &wr
->prot
,
2819 ISERT_PROT_KEY_VALID
, &wr
->ib_sg
[PROT
]);
2821 isert_err("conn %p failed to fast reg mr\n",
2823 goto unmap_prot_cmd
;
2827 ret
= isert_reg_sig_mr(isert_conn
, se_cmd
, wr
, wr
->fr_desc
);
2829 isert_err("conn %p failed to fast reg mr\n",
2831 goto unmap_prot_cmd
;
2833 wr
->fr_desc
->ind
|= ISERT_PROTECTED
;
2838 if (se_cmd
->t_prot_sg
)
2839 isert_unmap_data_buf(isert_conn
, &wr
->prot
);
2845 isert_reg_rdma(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
2846 struct isert_rdma_wr
*wr
)
2848 struct se_cmd
*se_cmd
= &cmd
->se_cmd
;
2849 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
2850 struct isert_conn
*isert_conn
= conn
->context
;
2851 struct fast_reg_descriptor
*fr_desc
= NULL
;
2852 struct ib_send_wr
*send_wr
;
2853 struct ib_sge
*ib_sg
;
2856 unsigned long flags
;
2858 isert_cmd
->tx_desc
.isert_cmd
= isert_cmd
;
2860 offset
= wr
->iser_ib_op
== ISER_IB_RDMA_READ
? cmd
->write_data_done
: 0;
2861 ret
= isert_map_data_buf(isert_conn
, isert_cmd
, se_cmd
->t_data_sg
,
2862 se_cmd
->t_data_nents
, se_cmd
->data_length
,
2863 offset
, wr
->iser_ib_op
, &wr
->data
);
2867 if (wr
->data
.dma_nents
!= 1 || isert_prot_cmd(isert_conn
, se_cmd
)) {
2868 spin_lock_irqsave(&isert_conn
->pool_lock
, flags
);
2869 fr_desc
= list_first_entry(&isert_conn
->fr_pool
,
2870 struct fast_reg_descriptor
, list
);
2871 list_del(&fr_desc
->list
);
2872 spin_unlock_irqrestore(&isert_conn
->pool_lock
, flags
);
2873 wr
->fr_desc
= fr_desc
;
2876 ret
= isert_fast_reg_mr(isert_conn
, fr_desc
, &wr
->data
,
2877 ISERT_DATA_KEY_VALID
, &wr
->ib_sg
[DATA
]);
2881 if (isert_prot_cmd(isert_conn
, se_cmd
)) {
2882 ret
= isert_handle_prot_cmd(isert_conn
, isert_cmd
, wr
);
2886 ib_sg
= &wr
->ib_sg
[SIG
];
2888 ib_sg
= &wr
->ib_sg
[DATA
];
2891 memcpy(&wr
->s_ib_sge
, ib_sg
, sizeof(*ib_sg
));
2892 wr
->ib_sge
= &wr
->s_ib_sge
;
2893 wr
->send_wr_num
= 1;
2894 memset(&wr
->s_send_wr
, 0, sizeof(*send_wr
));
2895 wr
->send_wr
= &wr
->s_send_wr
;
2896 wr
->isert_cmd
= isert_cmd
;
2898 send_wr
= &isert_cmd
->rdma_wr
.s_send_wr
;
2899 send_wr
->sg_list
= &wr
->s_ib_sge
;
2900 send_wr
->num_sge
= 1;
2901 send_wr
->wr_id
= (uintptr_t)&isert_cmd
->tx_desc
;
2902 if (wr
->iser_ib_op
== ISER_IB_RDMA_WRITE
) {
2903 send_wr
->opcode
= IB_WR_RDMA_WRITE
;
2904 send_wr
->wr
.rdma
.remote_addr
= isert_cmd
->read_va
;
2905 send_wr
->wr
.rdma
.rkey
= isert_cmd
->read_stag
;
2906 send_wr
->send_flags
= !isert_prot_cmd(isert_conn
, se_cmd
) ?
2907 0 : IB_SEND_SIGNALED
;
2909 send_wr
->opcode
= IB_WR_RDMA_READ
;
2910 send_wr
->wr
.rdma
.remote_addr
= isert_cmd
->write_va
;
2911 send_wr
->wr
.rdma
.rkey
= isert_cmd
->write_stag
;
2912 send_wr
->send_flags
= IB_SEND_SIGNALED
;
2919 spin_lock_irqsave(&isert_conn
->pool_lock
, flags
);
2920 list_add_tail(&fr_desc
->list
, &isert_conn
->fr_pool
);
2921 spin_unlock_irqrestore(&isert_conn
->pool_lock
, flags
);
2923 isert_unmap_data_buf(isert_conn
, &wr
->data
);
2929 isert_put_datain(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
)
2931 struct se_cmd
*se_cmd
= &cmd
->se_cmd
;
2932 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
2933 struct isert_rdma_wr
*wr
= &isert_cmd
->rdma_wr
;
2934 struct isert_conn
*isert_conn
= conn
->context
;
2935 struct isert_device
*device
= isert_conn
->device
;
2936 struct ib_send_wr
*wr_failed
;
2939 isert_dbg("Cmd: %p RDMA_WRITE data_length: %u\n",
2940 isert_cmd
, se_cmd
->data_length
);
2942 wr
->iser_ib_op
= ISER_IB_RDMA_WRITE
;
2943 rc
= device
->reg_rdma_mem(conn
, cmd
, wr
);
2945 isert_err("Cmd: %p failed to prepare RDMA res\n", isert_cmd
);
2949 if (!isert_prot_cmd(isert_conn
, se_cmd
)) {
2951 * Build isert_conn->tx_desc for iSCSI response PDU and attach
2953 isert_create_send_desc(isert_conn
, isert_cmd
,
2954 &isert_cmd
->tx_desc
);
2955 iscsit_build_rsp_pdu(cmd
, conn
, true, (struct iscsi_scsi_rsp
*)
2956 &isert_cmd
->tx_desc
.iscsi_header
);
2957 isert_init_tx_hdrs(isert_conn
, &isert_cmd
->tx_desc
);
2958 isert_init_send_wr(isert_conn
, isert_cmd
,
2959 &isert_cmd
->tx_desc
.send_wr
);
2960 isert_cmd
->rdma_wr
.s_send_wr
.next
= &isert_cmd
->tx_desc
.send_wr
;
2961 wr
->send_wr_num
+= 1;
2964 rc
= ib_post_send(isert_conn
->qp
, wr
->send_wr
, &wr_failed
);
2966 isert_warn("ib_post_send() failed for IB_WR_RDMA_WRITE\n");
2968 if (!isert_prot_cmd(isert_conn
, se_cmd
))
2969 isert_dbg("Cmd: %p posted RDMA_WRITE + Response for iSER Data "
2970 "READ\n", isert_cmd
);
2972 isert_dbg("Cmd: %p posted RDMA_WRITE for iSER Data READ\n",
2979 isert_get_dataout(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
, bool recovery
)
2981 struct se_cmd
*se_cmd
= &cmd
->se_cmd
;
2982 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
2983 struct isert_rdma_wr
*wr
= &isert_cmd
->rdma_wr
;
2984 struct isert_conn
*isert_conn
= conn
->context
;
2985 struct isert_device
*device
= isert_conn
->device
;
2986 struct ib_send_wr
*wr_failed
;
2989 isert_dbg("Cmd: %p RDMA_READ data_length: %u write_data_done: %u\n",
2990 isert_cmd
, se_cmd
->data_length
, cmd
->write_data_done
);
2991 wr
->iser_ib_op
= ISER_IB_RDMA_READ
;
2992 rc
= device
->reg_rdma_mem(conn
, cmd
, wr
);
2994 isert_err("Cmd: %p failed to prepare RDMA res\n", isert_cmd
);
2998 rc
= ib_post_send(isert_conn
->qp
, wr
->send_wr
, &wr_failed
);
3000 isert_warn("ib_post_send() failed for IB_WR_RDMA_READ\n");
3002 isert_dbg("Cmd: %p posted RDMA_READ memory for ISER Data WRITE\n",
3009 isert_immediate_queue(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
, int state
)
3014 case ISTATE_SEND_NOPIN_WANT_RESPONSE
:
3015 ret
= isert_put_nopin(cmd
, conn
, false);
3018 isert_err("Unknown immediate state: 0x%02x\n", state
);
3027 isert_response_queue(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
, int state
)
3029 struct isert_conn
*isert_conn
= conn
->context
;
3033 case ISTATE_SEND_LOGOUTRSP
:
3034 ret
= isert_put_logout_rsp(cmd
, conn
);
3036 isert_conn
->logout_posted
= true;
3038 case ISTATE_SEND_NOPIN
:
3039 ret
= isert_put_nopin(cmd
, conn
, true);
3041 case ISTATE_SEND_TASKMGTRSP
:
3042 ret
= isert_put_tm_rsp(cmd
, conn
);
3044 case ISTATE_SEND_REJECT
:
3045 ret
= isert_put_reject(cmd
, conn
);
3047 case ISTATE_SEND_TEXTRSP
:
3048 ret
= isert_put_text_rsp(cmd
, conn
);
3050 case ISTATE_SEND_STATUS
:
3052 * Special case for sending non GOOD SCSI status from TX thread
3053 * context during pre se_cmd excecution failure.
3055 ret
= isert_put_response(conn
, cmd
);
3058 isert_err("Unknown response state: 0x%02x\n", state
);
3067 isert_setup_id(struct isert_np
*isert_np
)
3069 struct iscsi_np
*np
= isert_np
->np
;
3070 struct rdma_cm_id
*id
;
3071 struct sockaddr
*sa
;
3074 sa
= (struct sockaddr
*)&np
->np_sockaddr
;
3075 isert_dbg("ksockaddr: %p, sa: %p\n", &np
->np_sockaddr
, sa
);
3077 id
= rdma_create_id(isert_cma_handler
, isert_np
,
3078 RDMA_PS_TCP
, IB_QPT_RC
);
3080 isert_err("rdma_create_id() failed: %ld\n", PTR_ERR(id
));
3084 isert_dbg("id %p context %p\n", id
, id
->context
);
3086 ret
= rdma_bind_addr(id
, sa
);
3088 isert_err("rdma_bind_addr() failed: %d\n", ret
);
3092 ret
= rdma_listen(id
, 0);
3094 isert_err("rdma_listen() failed: %d\n", ret
);
3100 rdma_destroy_id(id
);
3102 return ERR_PTR(ret
);
3106 isert_setup_np(struct iscsi_np
*np
,
3107 struct __kernel_sockaddr_storage
*ksockaddr
)
3109 struct isert_np
*isert_np
;
3110 struct rdma_cm_id
*isert_lid
;
3113 isert_np
= kzalloc(sizeof(struct isert_np
), GFP_KERNEL
);
3115 isert_err("Unable to allocate struct isert_np\n");
3118 sema_init(&isert_np
->np_sem
, 0);
3119 mutex_init(&isert_np
->np_accept_mutex
);
3120 INIT_LIST_HEAD(&isert_np
->np_accept_list
);
3121 init_completion(&isert_np
->np_login_comp
);
3125 * Setup the np->np_sockaddr from the passed sockaddr setup
3126 * in iscsi_target_configfs.c code..
3128 memcpy(&np
->np_sockaddr
, ksockaddr
,
3129 sizeof(struct __kernel_sockaddr_storage
));
3131 isert_lid
= isert_setup_id(isert_np
);
3132 if (IS_ERR(isert_lid
)) {
3133 ret
= PTR_ERR(isert_lid
);
3137 isert_np
->np_cm_id
= isert_lid
;
3138 np
->np_context
= isert_np
;
3149 isert_rdma_accept(struct isert_conn
*isert_conn
)
3151 struct rdma_cm_id
*cm_id
= isert_conn
->cm_id
;
3152 struct rdma_conn_param cp
;
3155 memset(&cp
, 0, sizeof(struct rdma_conn_param
));
3156 cp
.initiator_depth
= isert_conn
->initiator_depth
;
3158 cp
.rnr_retry_count
= 7;
3160 ret
= rdma_accept(cm_id
, &cp
);
3162 isert_err("rdma_accept() failed with: %d\n", ret
);
3170 isert_get_login_rx(struct iscsi_conn
*conn
, struct iscsi_login
*login
)
3172 struct isert_conn
*isert_conn
= conn
->context
;
3175 isert_info("before login_req comp conn: %p\n", isert_conn
);
3176 ret
= wait_for_completion_interruptible(&isert_conn
->login_req_comp
);
3178 isert_err("isert_conn %p interrupted before got login req\n",
3182 reinit_completion(&isert_conn
->login_req_comp
);
3185 * For login requests after the first PDU, isert_rx_login_req() will
3186 * kick schedule_delayed_work(&conn->login_work) as the packet is
3187 * received, which turns this callback from iscsi_target_do_login_rx()
3190 if (!login
->first_request
)
3193 isert_rx_login_req(isert_conn
);
3195 isert_info("before login_comp conn: %p\n", conn
);
3196 ret
= wait_for_completion_interruptible(&isert_conn
->login_comp
);
3200 isert_info("processing login->req: %p\n", login
->req
);
3206 isert_set_conn_info(struct iscsi_np
*np
, struct iscsi_conn
*conn
,
3207 struct isert_conn
*isert_conn
)
3209 struct rdma_cm_id
*cm_id
= isert_conn
->cm_id
;
3210 struct rdma_route
*cm_route
= &cm_id
->route
;
3211 struct sockaddr_in
*sock_in
;
3212 struct sockaddr_in6
*sock_in6
;
3214 conn
->login_family
= np
->np_sockaddr
.ss_family
;
3216 if (np
->np_sockaddr
.ss_family
== AF_INET6
) {
3217 sock_in6
= (struct sockaddr_in6
*)&cm_route
->addr
.dst_addr
;
3218 snprintf(conn
->login_ip
, sizeof(conn
->login_ip
), "%pI6c",
3219 &sock_in6
->sin6_addr
.in6_u
);
3220 conn
->login_port
= ntohs(sock_in6
->sin6_port
);
3222 sock_in6
= (struct sockaddr_in6
*)&cm_route
->addr
.src_addr
;
3223 snprintf(conn
->local_ip
, sizeof(conn
->local_ip
), "%pI6c",
3224 &sock_in6
->sin6_addr
.in6_u
);
3225 conn
->local_port
= ntohs(sock_in6
->sin6_port
);
3227 sock_in
= (struct sockaddr_in
*)&cm_route
->addr
.dst_addr
;
3228 sprintf(conn
->login_ip
, "%pI4",
3229 &sock_in
->sin_addr
.s_addr
);
3230 conn
->login_port
= ntohs(sock_in
->sin_port
);
3232 sock_in
= (struct sockaddr_in
*)&cm_route
->addr
.src_addr
;
3233 sprintf(conn
->local_ip
, "%pI4",
3234 &sock_in
->sin_addr
.s_addr
);
3235 conn
->local_port
= ntohs(sock_in
->sin_port
);
3240 isert_accept_np(struct iscsi_np
*np
, struct iscsi_conn
*conn
)
3242 struct isert_np
*isert_np
= np
->np_context
;
3243 struct isert_conn
*isert_conn
;
3247 ret
= down_interruptible(&isert_np
->np_sem
);
3251 spin_lock_bh(&np
->np_thread_lock
);
3252 if (np
->np_thread_state
>= ISCSI_NP_THREAD_RESET
) {
3253 spin_unlock_bh(&np
->np_thread_lock
);
3254 isert_dbg("np_thread_state %d\n",
3255 np
->np_thread_state
);
3257 * No point in stalling here when np_thread
3258 * is in state RESET/SHUTDOWN/EXIT - bail
3262 spin_unlock_bh(&np
->np_thread_lock
);
3264 mutex_lock(&isert_np
->np_accept_mutex
);
3265 if (list_empty(&isert_np
->np_accept_list
)) {
3266 mutex_unlock(&isert_np
->np_accept_mutex
);
3269 isert_conn
= list_first_entry(&isert_np
->np_accept_list
,
3270 struct isert_conn
, accept_node
);
3271 list_del_init(&isert_conn
->accept_node
);
3272 mutex_unlock(&isert_np
->np_accept_mutex
);
3274 conn
->context
= isert_conn
;
3275 isert_conn
->conn
= conn
;
3277 isert_set_conn_info(np
, conn
, isert_conn
);
3279 isert_dbg("Processing isert_conn: %p\n", isert_conn
);
3285 isert_free_np(struct iscsi_np
*np
)
3287 struct isert_np
*isert_np
= np
->np_context
;
3288 struct isert_conn
*isert_conn
, *n
;
3290 if (isert_np
->np_cm_id
)
3291 rdma_destroy_id(isert_np
->np_cm_id
);
3294 * FIXME: At this point we don't have a good way to insure
3295 * that at this point we don't have hanging connections that
3296 * completed RDMA establishment but didn't start iscsi login
3297 * process. So work-around this by cleaning up what ever piled
3298 * up in np_accept_list.
3300 mutex_lock(&isert_np
->np_accept_mutex
);
3301 if (!list_empty(&isert_np
->np_accept_list
)) {
3302 isert_info("Still have isert connections, cleaning up...\n");
3303 list_for_each_entry_safe(isert_conn
, n
,
3304 &isert_np
->np_accept_list
,
3306 isert_info("cleaning isert_conn %p state (%d)\n",
3307 isert_conn
, isert_conn
->state
);
3308 isert_connect_release(isert_conn
);
3311 mutex_unlock(&isert_np
->np_accept_mutex
);
3313 np
->np_context
= NULL
;
3317 static void isert_release_work(struct work_struct
*work
)
3319 struct isert_conn
*isert_conn
= container_of(work
,
3323 isert_info("Starting release conn %p\n", isert_conn
);
3325 wait_for_completion(&isert_conn
->wait
);
3327 mutex_lock(&isert_conn
->mutex
);
3328 isert_conn
->state
= ISER_CONN_DOWN
;
3329 mutex_unlock(&isert_conn
->mutex
);
3331 isert_info("Destroying conn %p\n", isert_conn
);
3332 isert_put_conn(isert_conn
);
3336 isert_wait4logout(struct isert_conn
*isert_conn
)
3338 struct iscsi_conn
*conn
= isert_conn
->conn
;
3340 isert_info("conn %p\n", isert_conn
);
3342 if (isert_conn
->logout_posted
) {
3343 isert_info("conn %p wait for conn_logout_comp\n", isert_conn
);
3344 wait_for_completion_timeout(&conn
->conn_logout_comp
,
3345 SECONDS_FOR_LOGOUT_COMP
* HZ
);
3350 isert_wait4cmds(struct iscsi_conn
*conn
)
3352 isert_info("iscsi_conn %p\n", conn
);
3355 target_sess_cmd_list_set_waiting(conn
->sess
->se_sess
);
3356 target_wait_for_sess_cmds(conn
->sess
->se_sess
);
3361 isert_wait4flush(struct isert_conn
*isert_conn
)
3363 struct ib_recv_wr
*bad_wr
;
3365 isert_info("conn %p\n", isert_conn
);
3367 init_completion(&isert_conn
->wait_comp_err
);
3368 isert_conn
->beacon
.wr_id
= ISER_BEACON_WRID
;
3369 /* post an indication that all flush errors were consumed */
3370 if (ib_post_recv(isert_conn
->qp
, &isert_conn
->beacon
, &bad_wr
)) {
3371 isert_err("conn %p failed to post beacon", isert_conn
);
3375 wait_for_completion(&isert_conn
->wait_comp_err
);
3378 static void isert_wait_conn(struct iscsi_conn
*conn
)
3380 struct isert_conn
*isert_conn
= conn
->context
;
3382 isert_info("Starting conn %p\n", isert_conn
);
3384 mutex_lock(&isert_conn
->mutex
);
3386 * Only wait for wait_comp_err if the isert_conn made it
3387 * into full feature phase..
3389 if (isert_conn
->state
== ISER_CONN_INIT
) {
3390 mutex_unlock(&isert_conn
->mutex
);
3393 isert_conn_terminate(isert_conn
);
3394 mutex_unlock(&isert_conn
->mutex
);
3396 isert_wait4cmds(conn
);
3397 isert_wait4flush(isert_conn
);
3398 isert_wait4logout(isert_conn
);
3400 queue_work(isert_release_wq
, &isert_conn
->release_work
);
3403 static void isert_free_conn(struct iscsi_conn
*conn
)
3405 struct isert_conn
*isert_conn
= conn
->context
;
3407 isert_wait4flush(isert_conn
);
3408 isert_put_conn(isert_conn
);
3411 static struct iscsit_transport iser_target_transport
= {
3413 .transport_type
= ISCSI_INFINIBAND
,
3414 .priv_size
= sizeof(struct isert_cmd
),
3415 .owner
= THIS_MODULE
,
3416 .iscsit_setup_np
= isert_setup_np
,
3417 .iscsit_accept_np
= isert_accept_np
,
3418 .iscsit_free_np
= isert_free_np
,
3419 .iscsit_wait_conn
= isert_wait_conn
,
3420 .iscsit_free_conn
= isert_free_conn
,
3421 .iscsit_get_login_rx
= isert_get_login_rx
,
3422 .iscsit_put_login_tx
= isert_put_login_tx
,
3423 .iscsit_immediate_queue
= isert_immediate_queue
,
3424 .iscsit_response_queue
= isert_response_queue
,
3425 .iscsit_get_dataout
= isert_get_dataout
,
3426 .iscsit_queue_data_in
= isert_put_datain
,
3427 .iscsit_queue_status
= isert_put_response
,
3428 .iscsit_aborted_task
= isert_aborted_task
,
3429 .iscsit_get_sup_prot_ops
= isert_get_sup_prot_ops
,
3432 static int __init
isert_init(void)
3436 isert_comp_wq
= alloc_workqueue("isert_comp_wq",
3437 WQ_UNBOUND
| WQ_HIGHPRI
, 0);
3438 if (!isert_comp_wq
) {
3439 isert_err("Unable to allocate isert_comp_wq\n");
3444 isert_release_wq
= alloc_workqueue("isert_release_wq", WQ_UNBOUND
,
3445 WQ_UNBOUND_MAX_ACTIVE
);
3446 if (!isert_release_wq
) {
3447 isert_err("Unable to allocate isert_release_wq\n");
3449 goto destroy_comp_wq
;
3452 iscsit_register_transport(&iser_target_transport
);
3453 isert_info("iSER_TARGET[0] - Loaded iser_target_transport\n");
3458 destroy_workqueue(isert_comp_wq
);
3463 static void __exit
isert_exit(void)
3465 flush_scheduled_work();
3466 destroy_workqueue(isert_release_wq
);
3467 destroy_workqueue(isert_comp_wq
);
3468 iscsit_unregister_transport(&iser_target_transport
);
3469 isert_info("iSER_TARGET[0] - Released iser_target_transport\n");
3472 MODULE_DESCRIPTION("iSER-Target for mainline target infrastructure");
3473 MODULE_VERSION("1.0");
3474 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3475 MODULE_LICENSE("GPL");
3477 module_init(isert_init
);
3478 module_exit(isert_exit
);