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 <linux/llist.h>
26 #include <rdma/ib_verbs.h>
27 #include <rdma/rdma_cm.h>
28 #include <target/target_core_base.h>
29 #include <target/target_core_fabric.h>
30 #include <target/iscsi/iscsi_transport.h>
31 #include <linux/semaphore.h>
33 #include "isert_proto.h"
36 #define ISERT_MAX_CONN 8
37 #define ISER_MAX_RX_CQ_LEN (ISERT_QP_MAX_RECV_DTOS * ISERT_MAX_CONN)
38 #define ISER_MAX_TX_CQ_LEN (ISERT_QP_MAX_REQ_DTOS * ISERT_MAX_CONN)
40 static DEFINE_MUTEX(device_list_mutex
);
41 static LIST_HEAD(device_list
);
42 static struct workqueue_struct
*isert_rx_wq
;
43 static struct workqueue_struct
*isert_comp_wq
;
46 isert_unmap_cmd(struct isert_cmd
*isert_cmd
, struct isert_conn
*isert_conn
);
48 isert_map_rdma(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
49 struct isert_rdma_wr
*wr
);
51 isert_unreg_rdma(struct isert_cmd
*isert_cmd
, struct isert_conn
*isert_conn
);
53 isert_reg_rdma(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
54 struct isert_rdma_wr
*wr
);
56 isert_put_response(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
);
59 isert_qp_event_callback(struct ib_event
*e
, void *context
)
61 struct isert_conn
*isert_conn
= (struct isert_conn
*)context
;
63 pr_err("isert_qp_event_callback event: %d\n", e
->event
);
65 case IB_EVENT_COMM_EST
:
66 rdma_notify(isert_conn
->conn_cm_id
, IB_EVENT_COMM_EST
);
68 case IB_EVENT_QP_LAST_WQE_REACHED
:
69 pr_warn("Reached TX IB_EVENT_QP_LAST_WQE_REACHED:\n");
77 isert_query_device(struct ib_device
*ib_dev
, struct ib_device_attr
*devattr
)
81 ret
= ib_query_device(ib_dev
, devattr
);
83 pr_err("ib_query_device() failed: %d\n", ret
);
86 pr_debug("devattr->max_sge: %d\n", devattr
->max_sge
);
87 pr_debug("devattr->max_sge_rd: %d\n", devattr
->max_sge_rd
);
93 isert_conn_setup_qp(struct isert_conn
*isert_conn
, struct rdma_cm_id
*cma_id
,
96 struct isert_device
*device
= isert_conn
->conn_device
;
97 struct ib_qp_init_attr attr
;
98 int ret
, index
, min_index
= 0;
100 mutex_lock(&device_list_mutex
);
101 for (index
= 0; index
< device
->cqs_used
; index
++)
102 if (device
->cq_active_qps
[index
] <
103 device
->cq_active_qps
[min_index
])
105 device
->cq_active_qps
[min_index
]++;
106 pr_debug("isert_conn_setup_qp: Using min_index: %d\n", min_index
);
107 mutex_unlock(&device_list_mutex
);
109 memset(&attr
, 0, sizeof(struct ib_qp_init_attr
));
110 attr
.event_handler
= isert_qp_event_callback
;
111 attr
.qp_context
= isert_conn
;
112 attr
.send_cq
= device
->dev_tx_cq
[min_index
];
113 attr
.recv_cq
= device
->dev_rx_cq
[min_index
];
114 attr
.cap
.max_send_wr
= ISERT_QP_MAX_REQ_DTOS
;
115 attr
.cap
.max_recv_wr
= ISERT_QP_MAX_RECV_DTOS
;
117 * FIXME: Use devattr.max_sge - 2 for max_send_sge as
118 * work-around for RDMA_READ..
120 attr
.cap
.max_send_sge
= device
->dev_attr
.max_sge
- 2;
121 isert_conn
->max_sge
= attr
.cap
.max_send_sge
;
123 attr
.cap
.max_recv_sge
= 1;
124 attr
.sq_sig_type
= IB_SIGNAL_REQ_WR
;
125 attr
.qp_type
= IB_QPT_RC
;
127 attr
.create_flags
|= IB_QP_CREATE_SIGNATURE_EN
;
129 pr_debug("isert_conn_setup_qp cma_id->device: %p\n",
131 pr_debug("isert_conn_setup_qp conn_pd->device: %p\n",
132 isert_conn
->conn_pd
->device
);
134 ret
= rdma_create_qp(cma_id
, isert_conn
->conn_pd
, &attr
);
136 pr_err("rdma_create_qp failed for cma_id %d\n", ret
);
139 isert_conn
->conn_qp
= cma_id
->qp
;
140 pr_debug("rdma_create_qp() returned success >>>>>>>>>>>>>>>>>>>>>>>>>.\n");
146 isert_cq_event_callback(struct ib_event
*e
, void *context
)
148 pr_debug("isert_cq_event_callback event: %d\n", e
->event
);
152 isert_alloc_rx_descriptors(struct isert_conn
*isert_conn
)
154 struct ib_device
*ib_dev
= isert_conn
->conn_cm_id
->device
;
155 struct iser_rx_desc
*rx_desc
;
156 struct ib_sge
*rx_sg
;
160 isert_conn
->conn_rx_descs
= kzalloc(ISERT_QP_MAX_RECV_DTOS
*
161 sizeof(struct iser_rx_desc
), GFP_KERNEL
);
162 if (!isert_conn
->conn_rx_descs
)
165 rx_desc
= isert_conn
->conn_rx_descs
;
167 for (i
= 0; i
< ISERT_QP_MAX_RECV_DTOS
; i
++, rx_desc
++) {
168 dma_addr
= ib_dma_map_single(ib_dev
, (void *)rx_desc
,
169 ISER_RX_PAYLOAD_SIZE
, DMA_FROM_DEVICE
);
170 if (ib_dma_mapping_error(ib_dev
, dma_addr
))
173 rx_desc
->dma_addr
= dma_addr
;
175 rx_sg
= &rx_desc
->rx_sg
;
176 rx_sg
->addr
= rx_desc
->dma_addr
;
177 rx_sg
->length
= ISER_RX_PAYLOAD_SIZE
;
178 rx_sg
->lkey
= isert_conn
->conn_mr
->lkey
;
181 isert_conn
->conn_rx_desc_head
= 0;
185 rx_desc
= isert_conn
->conn_rx_descs
;
186 for (j
= 0; j
< i
; j
++, rx_desc
++) {
187 ib_dma_unmap_single(ib_dev
, rx_desc
->dma_addr
,
188 ISER_RX_PAYLOAD_SIZE
, DMA_FROM_DEVICE
);
190 kfree(isert_conn
->conn_rx_descs
);
191 isert_conn
->conn_rx_descs
= NULL
;
197 isert_free_rx_descriptors(struct isert_conn
*isert_conn
)
199 struct ib_device
*ib_dev
= isert_conn
->conn_cm_id
->device
;
200 struct iser_rx_desc
*rx_desc
;
203 if (!isert_conn
->conn_rx_descs
)
206 rx_desc
= isert_conn
->conn_rx_descs
;
207 for (i
= 0; i
< ISERT_QP_MAX_RECV_DTOS
; i
++, rx_desc
++) {
208 ib_dma_unmap_single(ib_dev
, rx_desc
->dma_addr
,
209 ISER_RX_PAYLOAD_SIZE
, DMA_FROM_DEVICE
);
212 kfree(isert_conn
->conn_rx_descs
);
213 isert_conn
->conn_rx_descs
= NULL
;
216 static void isert_cq_tx_work(struct work_struct
*);
217 static void isert_cq_tx_callback(struct ib_cq
*, void *);
218 static void isert_cq_rx_work(struct work_struct
*);
219 static void isert_cq_rx_callback(struct ib_cq
*, void *);
222 isert_create_device_ib_res(struct isert_device
*device
)
224 struct ib_device
*ib_dev
= device
->ib_device
;
225 struct isert_cq_desc
*cq_desc
;
226 struct ib_device_attr
*dev_attr
;
229 dev_attr
= &device
->dev_attr
;
230 ret
= isert_query_device(ib_dev
, dev_attr
);
234 /* asign function handlers */
235 if (dev_attr
->device_cap_flags
& IB_DEVICE_MEM_MGT_EXTENSIONS
&&
236 dev_attr
->device_cap_flags
& IB_DEVICE_SIGNATURE_HANDOVER
) {
237 device
->use_fastreg
= 1;
238 device
->reg_rdma_mem
= isert_reg_rdma
;
239 device
->unreg_rdma_mem
= isert_unreg_rdma
;
241 device
->use_fastreg
= 0;
242 device
->reg_rdma_mem
= isert_map_rdma
;
243 device
->unreg_rdma_mem
= isert_unmap_cmd
;
246 /* Check signature cap */
247 device
->pi_capable
= dev_attr
->device_cap_flags
&
248 IB_DEVICE_SIGNATURE_HANDOVER
? true : false;
250 device
->cqs_used
= min_t(int, num_online_cpus(),
251 device
->ib_device
->num_comp_vectors
);
252 device
->cqs_used
= min(ISERT_MAX_CQ
, device
->cqs_used
);
253 pr_debug("Using %d CQs, device %s supports %d vectors support "
254 "Fast registration %d pi_capable %d\n",
255 device
->cqs_used
, device
->ib_device
->name
,
256 device
->ib_device
->num_comp_vectors
, device
->use_fastreg
,
258 device
->cq_desc
= kzalloc(sizeof(struct isert_cq_desc
) *
259 device
->cqs_used
, GFP_KERNEL
);
260 if (!device
->cq_desc
) {
261 pr_err("Unable to allocate device->cq_desc\n");
264 cq_desc
= device
->cq_desc
;
266 for (i
= 0; i
< device
->cqs_used
; i
++) {
267 cq_desc
[i
].device
= device
;
268 cq_desc
[i
].cq_index
= i
;
270 INIT_WORK(&cq_desc
[i
].cq_rx_work
, isert_cq_rx_work
);
271 device
->dev_rx_cq
[i
] = ib_create_cq(device
->ib_device
,
272 isert_cq_rx_callback
,
273 isert_cq_event_callback
,
275 ISER_MAX_RX_CQ_LEN
, i
);
276 if (IS_ERR(device
->dev_rx_cq
[i
])) {
277 ret
= PTR_ERR(device
->dev_rx_cq
[i
]);
278 device
->dev_rx_cq
[i
] = NULL
;
282 INIT_WORK(&cq_desc
[i
].cq_tx_work
, isert_cq_tx_work
);
283 device
->dev_tx_cq
[i
] = ib_create_cq(device
->ib_device
,
284 isert_cq_tx_callback
,
285 isert_cq_event_callback
,
287 ISER_MAX_TX_CQ_LEN
, i
);
288 if (IS_ERR(device
->dev_tx_cq
[i
])) {
289 ret
= PTR_ERR(device
->dev_tx_cq
[i
]);
290 device
->dev_tx_cq
[i
] = NULL
;
294 ret
= ib_req_notify_cq(device
->dev_rx_cq
[i
], IB_CQ_NEXT_COMP
);
298 ret
= ib_req_notify_cq(device
->dev_tx_cq
[i
], IB_CQ_NEXT_COMP
);
306 for (j
= 0; j
< i
; j
++) {
307 cq_desc
= &device
->cq_desc
[j
];
309 if (device
->dev_rx_cq
[j
]) {
310 cancel_work_sync(&cq_desc
->cq_rx_work
);
311 ib_destroy_cq(device
->dev_rx_cq
[j
]);
313 if (device
->dev_tx_cq
[j
]) {
314 cancel_work_sync(&cq_desc
->cq_tx_work
);
315 ib_destroy_cq(device
->dev_tx_cq
[j
]);
318 kfree(device
->cq_desc
);
324 isert_free_device_ib_res(struct isert_device
*device
)
326 struct isert_cq_desc
*cq_desc
;
329 for (i
= 0; i
< device
->cqs_used
; i
++) {
330 cq_desc
= &device
->cq_desc
[i
];
332 cancel_work_sync(&cq_desc
->cq_rx_work
);
333 cancel_work_sync(&cq_desc
->cq_tx_work
);
334 ib_destroy_cq(device
->dev_rx_cq
[i
]);
335 ib_destroy_cq(device
->dev_tx_cq
[i
]);
336 device
->dev_rx_cq
[i
] = NULL
;
337 device
->dev_tx_cq
[i
] = NULL
;
340 kfree(device
->cq_desc
);
344 isert_device_try_release(struct isert_device
*device
)
346 mutex_lock(&device_list_mutex
);
348 if (!device
->refcount
) {
349 isert_free_device_ib_res(device
);
350 list_del(&device
->dev_node
);
353 mutex_unlock(&device_list_mutex
);
356 static struct isert_device
*
357 isert_device_find_by_ib_dev(struct rdma_cm_id
*cma_id
)
359 struct isert_device
*device
;
362 mutex_lock(&device_list_mutex
);
363 list_for_each_entry(device
, &device_list
, dev_node
) {
364 if (device
->ib_device
->node_guid
== cma_id
->device
->node_guid
) {
366 mutex_unlock(&device_list_mutex
);
371 device
= kzalloc(sizeof(struct isert_device
), GFP_KERNEL
);
373 mutex_unlock(&device_list_mutex
);
374 return ERR_PTR(-ENOMEM
);
377 INIT_LIST_HEAD(&device
->dev_node
);
379 device
->ib_device
= cma_id
->device
;
380 ret
= isert_create_device_ib_res(device
);
383 mutex_unlock(&device_list_mutex
);
388 list_add_tail(&device
->dev_node
, &device_list
);
389 mutex_unlock(&device_list_mutex
);
395 isert_conn_free_fastreg_pool(struct isert_conn
*isert_conn
)
397 struct fast_reg_descriptor
*fr_desc
, *tmp
;
400 if (list_empty(&isert_conn
->conn_fr_pool
))
403 pr_debug("Freeing conn %p fastreg pool", isert_conn
);
405 list_for_each_entry_safe(fr_desc
, tmp
,
406 &isert_conn
->conn_fr_pool
, list
) {
407 list_del(&fr_desc
->list
);
408 ib_free_fast_reg_page_list(fr_desc
->data_frpl
);
409 ib_dereg_mr(fr_desc
->data_mr
);
410 if (fr_desc
->pi_ctx
) {
411 ib_free_fast_reg_page_list(fr_desc
->pi_ctx
->prot_frpl
);
412 ib_dereg_mr(fr_desc
->pi_ctx
->prot_mr
);
413 ib_destroy_mr(fr_desc
->pi_ctx
->sig_mr
);
414 kfree(fr_desc
->pi_ctx
);
420 if (i
< isert_conn
->conn_fr_pool_size
)
421 pr_warn("Pool still has %d regions registered\n",
422 isert_conn
->conn_fr_pool_size
- i
);
426 isert_create_fr_desc(struct ib_device
*ib_device
, struct ib_pd
*pd
,
427 struct fast_reg_descriptor
*fr_desc
, u8 protection
)
431 fr_desc
->data_frpl
= ib_alloc_fast_reg_page_list(ib_device
,
432 ISCSI_ISER_SG_TABLESIZE
);
433 if (IS_ERR(fr_desc
->data_frpl
)) {
434 pr_err("Failed to allocate data frpl err=%ld\n",
435 PTR_ERR(fr_desc
->data_frpl
));
436 return PTR_ERR(fr_desc
->data_frpl
);
439 fr_desc
->data_mr
= ib_alloc_fast_reg_mr(pd
, ISCSI_ISER_SG_TABLESIZE
);
440 if (IS_ERR(fr_desc
->data_mr
)) {
441 pr_err("Failed to allocate data frmr err=%ld\n",
442 PTR_ERR(fr_desc
->data_mr
));
443 ret
= PTR_ERR(fr_desc
->data_mr
);
446 pr_debug("Create fr_desc %p page_list %p\n",
447 fr_desc
, fr_desc
->data_frpl
->page_list
);
448 fr_desc
->ind
|= ISERT_DATA_KEY_VALID
;
451 struct ib_mr_init_attr mr_init_attr
= {0};
452 struct pi_context
*pi_ctx
;
454 fr_desc
->pi_ctx
= kzalloc(sizeof(*fr_desc
->pi_ctx
), GFP_KERNEL
);
455 if (!fr_desc
->pi_ctx
) {
456 pr_err("Failed to allocate pi context\n");
460 pi_ctx
= fr_desc
->pi_ctx
;
462 pi_ctx
->prot_frpl
= ib_alloc_fast_reg_page_list(ib_device
,
463 ISCSI_ISER_SG_TABLESIZE
);
464 if (IS_ERR(pi_ctx
->prot_frpl
)) {
465 pr_err("Failed to allocate prot frpl err=%ld\n",
466 PTR_ERR(pi_ctx
->prot_frpl
));
467 ret
= PTR_ERR(pi_ctx
->prot_frpl
);
471 pi_ctx
->prot_mr
= ib_alloc_fast_reg_mr(pd
, ISCSI_ISER_SG_TABLESIZE
);
472 if (IS_ERR(pi_ctx
->prot_mr
)) {
473 pr_err("Failed to allocate prot frmr err=%ld\n",
474 PTR_ERR(pi_ctx
->prot_mr
));
475 ret
= PTR_ERR(pi_ctx
->prot_mr
);
478 fr_desc
->ind
|= ISERT_PROT_KEY_VALID
;
480 mr_init_attr
.max_reg_descriptors
= 2;
481 mr_init_attr
.flags
|= IB_MR_SIGNATURE_EN
;
482 pi_ctx
->sig_mr
= ib_create_mr(pd
, &mr_init_attr
);
483 if (IS_ERR(pi_ctx
->sig_mr
)) {
484 pr_err("Failed to allocate signature enabled mr err=%ld\n",
485 PTR_ERR(pi_ctx
->sig_mr
));
486 ret
= PTR_ERR(pi_ctx
->sig_mr
);
489 fr_desc
->ind
|= ISERT_SIG_KEY_VALID
;
491 fr_desc
->ind
&= ~ISERT_PROTECTED
;
495 ib_dereg_mr(fr_desc
->pi_ctx
->prot_mr
);
497 ib_free_fast_reg_page_list(fr_desc
->pi_ctx
->prot_frpl
);
499 kfree(fr_desc
->pi_ctx
);
501 ib_dereg_mr(fr_desc
->data_mr
);
503 ib_free_fast_reg_page_list(fr_desc
->data_frpl
);
509 isert_conn_create_fastreg_pool(struct isert_conn
*isert_conn
, u8 pi_support
)
511 struct fast_reg_descriptor
*fr_desc
;
512 struct isert_device
*device
= isert_conn
->conn_device
;
513 struct se_session
*se_sess
= isert_conn
->conn
->sess
->se_sess
;
514 struct se_node_acl
*se_nacl
= se_sess
->se_node_acl
;
517 * Setup the number of FRMRs based upon the number of tags
518 * available to session in iscsi_target_locate_portal().
520 tag_num
= max_t(u32
, ISCSIT_MIN_TAGS
, se_nacl
->queue_depth
);
521 tag_num
= (tag_num
* 2) + ISCSIT_EXTRA_TAGS
;
523 isert_conn
->conn_fr_pool_size
= 0;
524 for (i
= 0; i
< tag_num
; i
++) {
525 fr_desc
= kzalloc(sizeof(*fr_desc
), GFP_KERNEL
);
527 pr_err("Failed to allocate fast_reg descriptor\n");
532 ret
= isert_create_fr_desc(device
->ib_device
,
533 isert_conn
->conn_pd
, fr_desc
,
536 pr_err("Failed to create fastreg descriptor err=%d\n",
542 list_add_tail(&fr_desc
->list
, &isert_conn
->conn_fr_pool
);
543 isert_conn
->conn_fr_pool_size
++;
546 pr_debug("Creating conn %p fastreg pool size=%d",
547 isert_conn
, isert_conn
->conn_fr_pool_size
);
552 isert_conn_free_fastreg_pool(isert_conn
);
557 isert_connect_request(struct rdma_cm_id
*cma_id
, struct rdma_cm_event
*event
)
559 struct iscsi_np
*np
= cma_id
->context
;
560 struct isert_np
*isert_np
= np
->np_context
;
561 struct isert_conn
*isert_conn
;
562 struct isert_device
*device
;
563 struct ib_device
*ib_dev
= cma_id
->device
;
567 spin_lock_bh(&np
->np_thread_lock
);
569 spin_unlock_bh(&np
->np_thread_lock
);
570 pr_debug("iscsi_np is not enabled, reject connect request\n");
571 return rdma_reject(cma_id
, NULL
, 0);
573 spin_unlock_bh(&np
->np_thread_lock
);
575 pr_debug("Entering isert_connect_request cma_id: %p, context: %p\n",
576 cma_id
, cma_id
->context
);
578 isert_conn
= kzalloc(sizeof(struct isert_conn
), GFP_KERNEL
);
580 pr_err("Unable to allocate isert_conn\n");
583 isert_conn
->state
= ISER_CONN_INIT
;
584 INIT_LIST_HEAD(&isert_conn
->conn_accept_node
);
585 init_completion(&isert_conn
->conn_login_comp
);
586 init_completion(&isert_conn
->conn_wait
);
587 init_completion(&isert_conn
->conn_wait_comp_err
);
588 kref_init(&isert_conn
->conn_kref
);
589 kref_get(&isert_conn
->conn_kref
);
590 mutex_init(&isert_conn
->conn_mutex
);
591 spin_lock_init(&isert_conn
->conn_lock
);
592 INIT_LIST_HEAD(&isert_conn
->conn_fr_pool
);
594 cma_id
->context
= isert_conn
;
595 isert_conn
->conn_cm_id
= cma_id
;
596 isert_conn
->responder_resources
= event
->param
.conn
.responder_resources
;
597 isert_conn
->initiator_depth
= event
->param
.conn
.initiator_depth
;
598 pr_debug("Using responder_resources: %u initiator_depth: %u\n",
599 isert_conn
->responder_resources
, isert_conn
->initiator_depth
);
601 isert_conn
->login_buf
= kzalloc(ISCSI_DEF_MAX_RECV_SEG_LEN
+
602 ISER_RX_LOGIN_SIZE
, GFP_KERNEL
);
603 if (!isert_conn
->login_buf
) {
604 pr_err("Unable to allocate isert_conn->login_buf\n");
609 isert_conn
->login_req_buf
= isert_conn
->login_buf
;
610 isert_conn
->login_rsp_buf
= isert_conn
->login_buf
+
611 ISCSI_DEF_MAX_RECV_SEG_LEN
;
612 pr_debug("Set login_buf: %p login_req_buf: %p login_rsp_buf: %p\n",
613 isert_conn
->login_buf
, isert_conn
->login_req_buf
,
614 isert_conn
->login_rsp_buf
);
616 isert_conn
->login_req_dma
= ib_dma_map_single(ib_dev
,
617 (void *)isert_conn
->login_req_buf
,
618 ISCSI_DEF_MAX_RECV_SEG_LEN
, DMA_FROM_DEVICE
);
620 ret
= ib_dma_mapping_error(ib_dev
, isert_conn
->login_req_dma
);
622 pr_err("ib_dma_mapping_error failed for login_req_dma: %d\n",
624 isert_conn
->login_req_dma
= 0;
628 isert_conn
->login_rsp_dma
= ib_dma_map_single(ib_dev
,
629 (void *)isert_conn
->login_rsp_buf
,
630 ISER_RX_LOGIN_SIZE
, DMA_TO_DEVICE
);
632 ret
= ib_dma_mapping_error(ib_dev
, isert_conn
->login_rsp_dma
);
634 pr_err("ib_dma_mapping_error failed for login_rsp_dma: %d\n",
636 isert_conn
->login_rsp_dma
= 0;
637 goto out_req_dma_map
;
640 device
= isert_device_find_by_ib_dev(cma_id
);
641 if (IS_ERR(device
)) {
642 ret
= PTR_ERR(device
);
643 goto out_rsp_dma_map
;
646 isert_conn
->conn_device
= device
;
647 isert_conn
->conn_pd
= ib_alloc_pd(isert_conn
->conn_device
->ib_device
);
648 if (IS_ERR(isert_conn
->conn_pd
)) {
649 ret
= PTR_ERR(isert_conn
->conn_pd
);
650 pr_err("ib_alloc_pd failed for conn %p: ret=%d\n",
655 isert_conn
->conn_mr
= ib_get_dma_mr(isert_conn
->conn_pd
,
656 IB_ACCESS_LOCAL_WRITE
);
657 if (IS_ERR(isert_conn
->conn_mr
)) {
658 ret
= PTR_ERR(isert_conn
->conn_mr
);
659 pr_err("ib_get_dma_mr failed for conn %p: ret=%d\n",
664 pi_support
= np
->tpg_np
->tpg
->tpg_attrib
.t10_pi
;
665 if (pi_support
&& !device
->pi_capable
) {
666 pr_err("Protection information requested but not supported, "
667 "rejecting connect request\n");
668 ret
= rdma_reject(cma_id
, NULL
, 0);
672 ret
= isert_conn_setup_qp(isert_conn
, cma_id
, pi_support
);
676 mutex_lock(&isert_np
->np_accept_mutex
);
677 list_add_tail(&isert_conn
->conn_accept_node
, &isert_np
->np_accept_list
);
678 mutex_unlock(&isert_np
->np_accept_mutex
);
680 pr_debug("isert_connect_request() up np_sem np: %p\n", np
);
681 up(&isert_np
->np_sem
);
685 ib_dereg_mr(isert_conn
->conn_mr
);
687 ib_dealloc_pd(isert_conn
->conn_pd
);
689 isert_device_try_release(device
);
691 ib_dma_unmap_single(ib_dev
, isert_conn
->login_rsp_dma
,
692 ISER_RX_LOGIN_SIZE
, DMA_TO_DEVICE
);
694 ib_dma_unmap_single(ib_dev
, isert_conn
->login_req_dma
,
695 ISCSI_DEF_MAX_RECV_SEG_LEN
, DMA_FROM_DEVICE
);
697 kfree(isert_conn
->login_buf
);
704 isert_connect_release(struct isert_conn
*isert_conn
)
706 struct ib_device
*ib_dev
= isert_conn
->conn_cm_id
->device
;
707 struct isert_device
*device
= isert_conn
->conn_device
;
710 pr_debug("Entering isert_connect_release(): >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
712 if (device
&& device
->use_fastreg
)
713 isert_conn_free_fastreg_pool(isert_conn
);
715 if (isert_conn
->conn_qp
) {
716 cq_index
= ((struct isert_cq_desc
*)
717 isert_conn
->conn_qp
->recv_cq
->cq_context
)->cq_index
;
718 pr_debug("isert_connect_release: cq_index: %d\n", cq_index
);
719 isert_conn
->conn_device
->cq_active_qps
[cq_index
]--;
721 rdma_destroy_qp(isert_conn
->conn_cm_id
);
724 isert_free_rx_descriptors(isert_conn
);
725 rdma_destroy_id(isert_conn
->conn_cm_id
);
727 ib_dereg_mr(isert_conn
->conn_mr
);
728 ib_dealloc_pd(isert_conn
->conn_pd
);
730 if (isert_conn
->login_buf
) {
731 ib_dma_unmap_single(ib_dev
, isert_conn
->login_rsp_dma
,
732 ISER_RX_LOGIN_SIZE
, DMA_TO_DEVICE
);
733 ib_dma_unmap_single(ib_dev
, isert_conn
->login_req_dma
,
734 ISCSI_DEF_MAX_RECV_SEG_LEN
,
736 kfree(isert_conn
->login_buf
);
741 isert_device_try_release(device
);
743 pr_debug("Leaving isert_connect_release >>>>>>>>>>>>\n");
747 isert_connected_handler(struct rdma_cm_id
*cma_id
)
753 isert_release_conn_kref(struct kref
*kref
)
755 struct isert_conn
*isert_conn
= container_of(kref
,
756 struct isert_conn
, conn_kref
);
758 pr_debug("Calling isert_connect_release for final kref %s/%d\n",
759 current
->comm
, current
->pid
);
761 isert_connect_release(isert_conn
);
765 isert_put_conn(struct isert_conn
*isert_conn
)
767 kref_put(&isert_conn
->conn_kref
, isert_release_conn_kref
);
771 isert_disconnect_work(struct work_struct
*work
)
773 struct isert_conn
*isert_conn
= container_of(work
,
774 struct isert_conn
, conn_logout_work
);
776 pr_debug("isert_disconnect_work(): >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
777 mutex_lock(&isert_conn
->conn_mutex
);
778 if (isert_conn
->state
== ISER_CONN_UP
)
779 isert_conn
->state
= ISER_CONN_TERMINATING
;
781 if (isert_conn
->post_recv_buf_count
== 0 &&
782 atomic_read(&isert_conn
->post_send_buf_count
) == 0) {
783 mutex_unlock(&isert_conn
->conn_mutex
);
786 if (!isert_conn
->conn_cm_id
) {
787 mutex_unlock(&isert_conn
->conn_mutex
);
788 isert_put_conn(isert_conn
);
792 if (isert_conn
->disconnect
) {
793 /* Send DREQ/DREP towards our initiator */
794 rdma_disconnect(isert_conn
->conn_cm_id
);
797 mutex_unlock(&isert_conn
->conn_mutex
);
800 complete(&isert_conn
->conn_wait
);
801 isert_put_conn(isert_conn
);
805 isert_disconnected_handler(struct rdma_cm_id
*cma_id
, bool disconnect
)
807 struct isert_conn
*isert_conn
= (struct isert_conn
*)cma_id
->context
;
809 isert_conn
->disconnect
= disconnect
;
810 INIT_WORK(&isert_conn
->conn_logout_work
, isert_disconnect_work
);
811 schedule_work(&isert_conn
->conn_logout_work
);
815 isert_cma_handler(struct rdma_cm_id
*cma_id
, struct rdma_cm_event
*event
)
818 bool disconnect
= false;
820 pr_debug("isert_cma_handler: event %d status %d conn %p id %p\n",
821 event
->event
, event
->status
, cma_id
->context
, cma_id
);
823 switch (event
->event
) {
824 case RDMA_CM_EVENT_CONNECT_REQUEST
:
825 ret
= isert_connect_request(cma_id
, event
);
827 case RDMA_CM_EVENT_ESTABLISHED
:
828 isert_connected_handler(cma_id
);
830 case RDMA_CM_EVENT_ADDR_CHANGE
: /* FALLTHRU */
831 case RDMA_CM_EVENT_DISCONNECTED
: /* FALLTHRU */
832 case RDMA_CM_EVENT_DEVICE_REMOVAL
: /* FALLTHRU */
834 case RDMA_CM_EVENT_TIMEWAIT_EXIT
: /* FALLTHRU */
835 isert_disconnected_handler(cma_id
, disconnect
);
837 case RDMA_CM_EVENT_CONNECT_ERROR
:
839 pr_err("Unhandled RDMA CMA event: %d\n", event
->event
);
844 pr_err("isert_cma_handler failed RDMA_CM_EVENT: 0x%08x %d\n",
853 isert_post_recv(struct isert_conn
*isert_conn
, u32 count
)
855 struct ib_recv_wr
*rx_wr
, *rx_wr_failed
;
857 unsigned int rx_head
= isert_conn
->conn_rx_desc_head
;
858 struct iser_rx_desc
*rx_desc
;
860 for (rx_wr
= isert_conn
->conn_rx_wr
, i
= 0; i
< count
; i
++, rx_wr
++) {
861 rx_desc
= &isert_conn
->conn_rx_descs
[rx_head
];
862 rx_wr
->wr_id
= (unsigned long)rx_desc
;
863 rx_wr
->sg_list
= &rx_desc
->rx_sg
;
865 rx_wr
->next
= rx_wr
+ 1;
866 rx_head
= (rx_head
+ 1) & (ISERT_QP_MAX_RECV_DTOS
- 1);
870 rx_wr
->next
= NULL
; /* mark end of work requests list */
872 isert_conn
->post_recv_buf_count
+= count
;
873 ret
= ib_post_recv(isert_conn
->conn_qp
, isert_conn
->conn_rx_wr
,
876 pr_err("ib_post_recv() failed with ret: %d\n", ret
);
877 isert_conn
->post_recv_buf_count
-= count
;
879 pr_debug("isert_post_recv(): Posted %d RX buffers\n", count
);
880 isert_conn
->conn_rx_desc_head
= rx_head
;
886 isert_post_send(struct isert_conn
*isert_conn
, struct iser_tx_desc
*tx_desc
)
888 struct ib_device
*ib_dev
= isert_conn
->conn_cm_id
->device
;
889 struct ib_send_wr send_wr
, *send_wr_failed
;
892 ib_dma_sync_single_for_device(ib_dev
, tx_desc
->dma_addr
,
893 ISER_HEADERS_LEN
, DMA_TO_DEVICE
);
896 send_wr
.wr_id
= (unsigned long)tx_desc
;
897 send_wr
.sg_list
= tx_desc
->tx_sg
;
898 send_wr
.num_sge
= tx_desc
->num_sge
;
899 send_wr
.opcode
= IB_WR_SEND
;
900 send_wr
.send_flags
= IB_SEND_SIGNALED
;
902 atomic_inc(&isert_conn
->post_send_buf_count
);
904 ret
= ib_post_send(isert_conn
->conn_qp
, &send_wr
, &send_wr_failed
);
906 pr_err("ib_post_send() failed, ret: %d\n", ret
);
907 atomic_dec(&isert_conn
->post_send_buf_count
);
914 isert_create_send_desc(struct isert_conn
*isert_conn
,
915 struct isert_cmd
*isert_cmd
,
916 struct iser_tx_desc
*tx_desc
)
918 struct ib_device
*ib_dev
= isert_conn
->conn_cm_id
->device
;
920 ib_dma_sync_single_for_cpu(ib_dev
, tx_desc
->dma_addr
,
921 ISER_HEADERS_LEN
, DMA_TO_DEVICE
);
923 memset(&tx_desc
->iser_header
, 0, sizeof(struct iser_hdr
));
924 tx_desc
->iser_header
.flags
= ISER_VER
;
926 tx_desc
->num_sge
= 1;
927 tx_desc
->isert_cmd
= isert_cmd
;
929 if (tx_desc
->tx_sg
[0].lkey
!= isert_conn
->conn_mr
->lkey
) {
930 tx_desc
->tx_sg
[0].lkey
= isert_conn
->conn_mr
->lkey
;
931 pr_debug("tx_desc %p lkey mismatch, fixing\n", tx_desc
);
936 isert_init_tx_hdrs(struct isert_conn
*isert_conn
,
937 struct iser_tx_desc
*tx_desc
)
939 struct ib_device
*ib_dev
= isert_conn
->conn_cm_id
->device
;
942 dma_addr
= ib_dma_map_single(ib_dev
, (void *)tx_desc
,
943 ISER_HEADERS_LEN
, DMA_TO_DEVICE
);
944 if (ib_dma_mapping_error(ib_dev
, dma_addr
)) {
945 pr_err("ib_dma_mapping_error() failed\n");
949 tx_desc
->dma_addr
= dma_addr
;
950 tx_desc
->tx_sg
[0].addr
= tx_desc
->dma_addr
;
951 tx_desc
->tx_sg
[0].length
= ISER_HEADERS_LEN
;
952 tx_desc
->tx_sg
[0].lkey
= isert_conn
->conn_mr
->lkey
;
954 pr_debug("isert_init_tx_hdrs: Setup tx_sg[0].addr: 0x%llx length: %u"
955 " lkey: 0x%08x\n", tx_desc
->tx_sg
[0].addr
,
956 tx_desc
->tx_sg
[0].length
, tx_desc
->tx_sg
[0].lkey
);
962 isert_init_send_wr(struct isert_conn
*isert_conn
, struct isert_cmd
*isert_cmd
,
963 struct ib_send_wr
*send_wr
, bool coalesce
)
965 struct iser_tx_desc
*tx_desc
= &isert_cmd
->tx_desc
;
967 isert_cmd
->rdma_wr
.iser_ib_op
= ISER_IB_SEND
;
968 send_wr
->wr_id
= (unsigned long)&isert_cmd
->tx_desc
;
969 send_wr
->opcode
= IB_WR_SEND
;
970 send_wr
->sg_list
= &tx_desc
->tx_sg
[0];
971 send_wr
->num_sge
= isert_cmd
->tx_desc
.num_sge
;
973 * Coalesce send completion interrupts by only setting IB_SEND_SIGNALED
974 * bit for every ISERT_COMP_BATCH_COUNT number of ib_post_send() calls.
976 mutex_lock(&isert_conn
->conn_mutex
);
977 if (coalesce
&& isert_conn
->state
== ISER_CONN_UP
&&
978 ++isert_conn
->conn_comp_batch
< ISERT_COMP_BATCH_COUNT
) {
979 tx_desc
->llnode_active
= true;
980 llist_add(&tx_desc
->comp_llnode
, &isert_conn
->conn_comp_llist
);
981 mutex_unlock(&isert_conn
->conn_mutex
);
984 isert_conn
->conn_comp_batch
= 0;
985 tx_desc
->comp_llnode_batch
= llist_del_all(&isert_conn
->conn_comp_llist
);
986 mutex_unlock(&isert_conn
->conn_mutex
);
988 send_wr
->send_flags
= IB_SEND_SIGNALED
;
992 isert_rdma_post_recvl(struct isert_conn
*isert_conn
)
994 struct ib_recv_wr rx_wr
, *rx_wr_fail
;
998 memset(&sge
, 0, sizeof(struct ib_sge
));
999 sge
.addr
= isert_conn
->login_req_dma
;
1000 sge
.length
= ISER_RX_LOGIN_SIZE
;
1001 sge
.lkey
= isert_conn
->conn_mr
->lkey
;
1003 pr_debug("Setup sge: addr: %llx length: %d 0x%08x\n",
1004 sge
.addr
, sge
.length
, sge
.lkey
);
1006 memset(&rx_wr
, 0, sizeof(struct ib_recv_wr
));
1007 rx_wr
.wr_id
= (unsigned long)isert_conn
->login_req_buf
;
1008 rx_wr
.sg_list
= &sge
;
1011 isert_conn
->post_recv_buf_count
++;
1012 ret
= ib_post_recv(isert_conn
->conn_qp
, &rx_wr
, &rx_wr_fail
);
1014 pr_err("ib_post_recv() failed: %d\n", ret
);
1015 isert_conn
->post_recv_buf_count
--;
1018 pr_debug("ib_post_recv(): returned success >>>>>>>>>>>>>>>>>>>>>>>>\n");
1023 isert_put_login_tx(struct iscsi_conn
*conn
, struct iscsi_login
*login
,
1026 struct isert_conn
*isert_conn
= conn
->context
;
1027 struct ib_device
*ib_dev
= isert_conn
->conn_cm_id
->device
;
1028 struct iser_tx_desc
*tx_desc
= &isert_conn
->conn_login_tx_desc
;
1031 isert_create_send_desc(isert_conn
, NULL
, tx_desc
);
1033 memcpy(&tx_desc
->iscsi_header
, &login
->rsp
[0],
1034 sizeof(struct iscsi_hdr
));
1036 isert_init_tx_hdrs(isert_conn
, tx_desc
);
1039 struct ib_sge
*tx_dsg
= &tx_desc
->tx_sg
[1];
1041 ib_dma_sync_single_for_cpu(ib_dev
, isert_conn
->login_rsp_dma
,
1042 length
, DMA_TO_DEVICE
);
1044 memcpy(isert_conn
->login_rsp_buf
, login
->rsp_buf
, length
);
1046 ib_dma_sync_single_for_device(ib_dev
, isert_conn
->login_rsp_dma
,
1047 length
, DMA_TO_DEVICE
);
1049 tx_dsg
->addr
= isert_conn
->login_rsp_dma
;
1050 tx_dsg
->length
= length
;
1051 tx_dsg
->lkey
= isert_conn
->conn_mr
->lkey
;
1052 tx_desc
->num_sge
= 2;
1054 if (!login
->login_failed
) {
1055 if (login
->login_complete
) {
1056 if (!conn
->sess
->sess_ops
->SessionType
&&
1057 isert_conn
->conn_device
->use_fastreg
) {
1058 /* Normal Session and fastreg is used */
1059 u8 pi_support
= login
->np
->tpg_np
->tpg
->tpg_attrib
.t10_pi
;
1061 ret
= isert_conn_create_fastreg_pool(isert_conn
,
1064 pr_err("Conn: %p failed to create"
1065 " fastreg pool\n", isert_conn
);
1070 ret
= isert_alloc_rx_descriptors(isert_conn
);
1074 ret
= isert_post_recv(isert_conn
, ISERT_MIN_POSTED_RX
);
1078 isert_conn
->state
= ISER_CONN_UP
;
1082 ret
= isert_rdma_post_recvl(isert_conn
);
1087 ret
= isert_post_send(isert_conn
, tx_desc
);
1095 isert_rx_login_req(struct iser_rx_desc
*rx_desc
, int rx_buflen
,
1096 struct isert_conn
*isert_conn
)
1098 struct iscsi_conn
*conn
= isert_conn
->conn
;
1099 struct iscsi_login
*login
= conn
->conn_login
;
1103 pr_err("conn->conn_login is NULL\n");
1108 if (login
->first_request
) {
1109 struct iscsi_login_req
*login_req
=
1110 (struct iscsi_login_req
*)&rx_desc
->iscsi_header
;
1112 * Setup the initial iscsi_login values from the leading
1113 * login request PDU.
1115 login
->leading_connection
= (!login_req
->tsih
) ? 1 : 0;
1116 login
->current_stage
=
1117 (login_req
->flags
& ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK
)
1119 login
->version_min
= login_req
->min_version
;
1120 login
->version_max
= login_req
->max_version
;
1121 memcpy(login
->isid
, login_req
->isid
, 6);
1122 login
->cmd_sn
= be32_to_cpu(login_req
->cmdsn
);
1123 login
->init_task_tag
= login_req
->itt
;
1124 login
->initial_exp_statsn
= be32_to_cpu(login_req
->exp_statsn
);
1125 login
->cid
= be16_to_cpu(login_req
->cid
);
1126 login
->tsih
= be16_to_cpu(login_req
->tsih
);
1129 memcpy(&login
->req
[0], (void *)&rx_desc
->iscsi_header
, ISCSI_HDR_LEN
);
1131 size
= min(rx_buflen
, MAX_KEY_VALUE_PAIRS
);
1132 pr_debug("Using login payload size: %d, rx_buflen: %d MAX_KEY_VALUE_PAIRS: %d\n",
1133 size
, rx_buflen
, MAX_KEY_VALUE_PAIRS
);
1134 memcpy(login
->req_buf
, &rx_desc
->data
[0], size
);
1136 if (login
->first_request
) {
1137 complete(&isert_conn
->conn_login_comp
);
1140 schedule_delayed_work(&conn
->login_work
, 0);
1143 static struct iscsi_cmd
1144 *isert_allocate_cmd(struct iscsi_conn
*conn
)
1146 struct isert_conn
*isert_conn
= (struct isert_conn
*)conn
->context
;
1147 struct isert_cmd
*isert_cmd
;
1148 struct iscsi_cmd
*cmd
;
1150 cmd
= iscsit_allocate_cmd(conn
, TASK_INTERRUPTIBLE
);
1152 pr_err("Unable to allocate iscsi_cmd + isert_cmd\n");
1155 isert_cmd
= iscsit_priv_cmd(cmd
);
1156 isert_cmd
->conn
= isert_conn
;
1157 isert_cmd
->iscsi_cmd
= cmd
;
1163 isert_handle_scsi_cmd(struct isert_conn
*isert_conn
,
1164 struct isert_cmd
*isert_cmd
, struct iscsi_cmd
*cmd
,
1165 struct iser_rx_desc
*rx_desc
, unsigned char *buf
)
1167 struct iscsi_conn
*conn
= isert_conn
->conn
;
1168 struct iscsi_scsi_req
*hdr
= (struct iscsi_scsi_req
*)buf
;
1169 struct scatterlist
*sg
;
1170 int imm_data
, imm_data_len
, unsol_data
, sg_nents
, rc
;
1171 bool dump_payload
= false;
1173 rc
= iscsit_setup_scsi_cmd(conn
, cmd
, buf
);
1177 imm_data
= cmd
->immediate_data
;
1178 imm_data_len
= cmd
->first_burst_len
;
1179 unsol_data
= cmd
->unsolicited_data
;
1181 rc
= iscsit_process_scsi_cmd(conn
, cmd
, hdr
);
1184 } else if (rc
> 0) {
1185 dump_payload
= true;
1192 sg
= &cmd
->se_cmd
.t_data_sg
[0];
1193 sg_nents
= max(1UL, DIV_ROUND_UP(imm_data_len
, PAGE_SIZE
));
1195 pr_debug("Copying Immediate SG: %p sg_nents: %u from %p imm_data_len: %d\n",
1196 sg
, sg_nents
, &rx_desc
->data
[0], imm_data_len
);
1198 sg_copy_from_buffer(sg
, sg_nents
, &rx_desc
->data
[0], imm_data_len
);
1200 cmd
->write_data_done
+= imm_data_len
;
1202 if (cmd
->write_data_done
== cmd
->se_cmd
.data_length
) {
1203 spin_lock_bh(&cmd
->istate_lock
);
1204 cmd
->cmd_flags
|= ICF_GOT_LAST_DATAOUT
;
1205 cmd
->i_state
= ISTATE_RECEIVED_LAST_DATAOUT
;
1206 spin_unlock_bh(&cmd
->istate_lock
);
1210 rc
= iscsit_sequence_cmd(conn
, cmd
, buf
, hdr
->cmdsn
);
1212 if (!rc
&& dump_payload
== false && unsol_data
)
1213 iscsit_set_unsoliticed_dataout(cmd
);
1214 else if (dump_payload
&& imm_data
)
1215 target_put_sess_cmd(conn
->sess
->se_sess
, &cmd
->se_cmd
);
1221 isert_handle_iscsi_dataout(struct isert_conn
*isert_conn
,
1222 struct iser_rx_desc
*rx_desc
, unsigned char *buf
)
1224 struct scatterlist
*sg_start
;
1225 struct iscsi_conn
*conn
= isert_conn
->conn
;
1226 struct iscsi_cmd
*cmd
= NULL
;
1227 struct iscsi_data
*hdr
= (struct iscsi_data
*)buf
;
1228 u32 unsol_data_len
= ntoh24(hdr
->dlength
);
1229 int rc
, sg_nents
, sg_off
, page_off
;
1231 rc
= iscsit_check_dataout_hdr(conn
, buf
, &cmd
);
1237 * FIXME: Unexpected unsolicited_data out
1239 if (!cmd
->unsolicited_data
) {
1240 pr_err("Received unexpected solicited data payload\n");
1245 pr_debug("Unsolicited DataOut unsol_data_len: %u, write_data_done: %u, data_length: %u\n",
1246 unsol_data_len
, cmd
->write_data_done
, cmd
->se_cmd
.data_length
);
1248 sg_off
= cmd
->write_data_done
/ PAGE_SIZE
;
1249 sg_start
= &cmd
->se_cmd
.t_data_sg
[sg_off
];
1250 sg_nents
= max(1UL, DIV_ROUND_UP(unsol_data_len
, PAGE_SIZE
));
1251 page_off
= cmd
->write_data_done
% PAGE_SIZE
;
1253 * FIXME: Non page-aligned unsolicited_data out
1256 pr_err("Received unexpected non-page aligned data payload\n");
1260 pr_debug("Copying DataOut: sg_start: %p, sg_off: %u sg_nents: %u from %p %u\n",
1261 sg_start
, sg_off
, sg_nents
, &rx_desc
->data
[0], unsol_data_len
);
1263 sg_copy_from_buffer(sg_start
, sg_nents
, &rx_desc
->data
[0],
1266 rc
= iscsit_check_dataout_payload(cmd
, hdr
, false);
1274 isert_handle_nop_out(struct isert_conn
*isert_conn
, struct isert_cmd
*isert_cmd
,
1275 struct iscsi_cmd
*cmd
, struct iser_rx_desc
*rx_desc
,
1278 struct iscsi_conn
*conn
= isert_conn
->conn
;
1279 struct iscsi_nopout
*hdr
= (struct iscsi_nopout
*)buf
;
1282 rc
= iscsit_setup_nop_out(conn
, cmd
, hdr
);
1286 * FIXME: Add support for NOPOUT payload using unsolicited RDMA payload
1289 return iscsit_process_nop_out(conn
, cmd
, hdr
);
1293 isert_handle_text_cmd(struct isert_conn
*isert_conn
, struct isert_cmd
*isert_cmd
,
1294 struct iscsi_cmd
*cmd
, struct iser_rx_desc
*rx_desc
,
1295 struct iscsi_text
*hdr
)
1297 struct iscsi_conn
*conn
= isert_conn
->conn
;
1298 u32 payload_length
= ntoh24(hdr
->dlength
);
1300 unsigned char *text_in
;
1302 rc
= iscsit_setup_text_cmd(conn
, cmd
, hdr
);
1306 text_in
= kzalloc(payload_length
, GFP_KERNEL
);
1308 pr_err("Unable to allocate text_in of payload_length: %u\n",
1312 cmd
->text_in_ptr
= text_in
;
1314 memcpy(cmd
->text_in_ptr
, &rx_desc
->data
[0], payload_length
);
1316 return iscsit_process_text_cmd(conn
, cmd
, hdr
);
1320 isert_rx_opcode(struct isert_conn
*isert_conn
, struct iser_rx_desc
*rx_desc
,
1321 uint32_t read_stag
, uint64_t read_va
,
1322 uint32_t write_stag
, uint64_t write_va
)
1324 struct iscsi_hdr
*hdr
= &rx_desc
->iscsi_header
;
1325 struct iscsi_conn
*conn
= isert_conn
->conn
;
1326 struct iscsi_session
*sess
= conn
->sess
;
1327 struct iscsi_cmd
*cmd
;
1328 struct isert_cmd
*isert_cmd
;
1330 u8 opcode
= (hdr
->opcode
& ISCSI_OPCODE_MASK
);
1332 if (sess
->sess_ops
->SessionType
&&
1333 (!(opcode
& ISCSI_OP_TEXT
) || !(opcode
& ISCSI_OP_LOGOUT
))) {
1334 pr_err("Got illegal opcode: 0x%02x in SessionType=Discovery,"
1335 " ignoring\n", opcode
);
1340 case ISCSI_OP_SCSI_CMD
:
1341 cmd
= isert_allocate_cmd(conn
);
1345 isert_cmd
= iscsit_priv_cmd(cmd
);
1346 isert_cmd
->read_stag
= read_stag
;
1347 isert_cmd
->read_va
= read_va
;
1348 isert_cmd
->write_stag
= write_stag
;
1349 isert_cmd
->write_va
= write_va
;
1351 ret
= isert_handle_scsi_cmd(isert_conn
, isert_cmd
, cmd
,
1352 rx_desc
, (unsigned char *)hdr
);
1354 case ISCSI_OP_NOOP_OUT
:
1355 cmd
= isert_allocate_cmd(conn
);
1359 isert_cmd
= iscsit_priv_cmd(cmd
);
1360 ret
= isert_handle_nop_out(isert_conn
, isert_cmd
, cmd
,
1361 rx_desc
, (unsigned char *)hdr
);
1363 case ISCSI_OP_SCSI_DATA_OUT
:
1364 ret
= isert_handle_iscsi_dataout(isert_conn
, rx_desc
,
1365 (unsigned char *)hdr
);
1367 case ISCSI_OP_SCSI_TMFUNC
:
1368 cmd
= isert_allocate_cmd(conn
);
1372 ret
= iscsit_handle_task_mgt_cmd(conn
, cmd
,
1373 (unsigned char *)hdr
);
1375 case ISCSI_OP_LOGOUT
:
1376 cmd
= isert_allocate_cmd(conn
);
1380 ret
= iscsit_handle_logout_cmd(conn
, cmd
, (unsigned char *)hdr
);
1382 wait_for_completion_timeout(&conn
->conn_logout_comp
,
1383 SECONDS_FOR_LOGOUT_COMP
*
1387 cmd
= isert_allocate_cmd(conn
);
1391 isert_cmd
= iscsit_priv_cmd(cmd
);
1392 ret
= isert_handle_text_cmd(isert_conn
, isert_cmd
, cmd
,
1393 rx_desc
, (struct iscsi_text
*)hdr
);
1396 pr_err("Got unknown iSCSI OpCode: 0x%02x\n", opcode
);
1405 isert_rx_do_work(struct iser_rx_desc
*rx_desc
, struct isert_conn
*isert_conn
)
1407 struct iser_hdr
*iser_hdr
= &rx_desc
->iser_header
;
1408 uint64_t read_va
= 0, write_va
= 0;
1409 uint32_t read_stag
= 0, write_stag
= 0;
1412 switch (iser_hdr
->flags
& 0xF0) {
1414 if (iser_hdr
->flags
& ISER_RSV
) {
1415 read_stag
= be32_to_cpu(iser_hdr
->read_stag
);
1416 read_va
= be64_to_cpu(iser_hdr
->read_va
);
1417 pr_debug("ISER_RSV: read_stag: 0x%08x read_va: 0x%16llx\n",
1418 read_stag
, (unsigned long long)read_va
);
1420 if (iser_hdr
->flags
& ISER_WSV
) {
1421 write_stag
= be32_to_cpu(iser_hdr
->write_stag
);
1422 write_va
= be64_to_cpu(iser_hdr
->write_va
);
1423 pr_debug("ISER_WSV: write__stag: 0x%08x write_va: 0x%16llx\n",
1424 write_stag
, (unsigned long long)write_va
);
1427 pr_debug("ISER ISCSI_CTRL PDU\n");
1430 pr_err("iSER Hello message\n");
1433 pr_warn("Unknown iSER hdr flags: 0x%02x\n", iser_hdr
->flags
);
1437 rc
= isert_rx_opcode(isert_conn
, rx_desc
,
1438 read_stag
, read_va
, write_stag
, write_va
);
1442 isert_rx_completion(struct iser_rx_desc
*desc
, struct isert_conn
*isert_conn
,
1443 unsigned long xfer_len
)
1445 struct ib_device
*ib_dev
= isert_conn
->conn_cm_id
->device
;
1446 struct iscsi_hdr
*hdr
;
1448 int rx_buflen
, outstanding
;
1450 if ((char *)desc
== isert_conn
->login_req_buf
) {
1451 rx_dma
= isert_conn
->login_req_dma
;
1452 rx_buflen
= ISER_RX_LOGIN_SIZE
;
1453 pr_debug("ISER login_buf: Using rx_dma: 0x%llx, rx_buflen: %d\n",
1456 rx_dma
= desc
->dma_addr
;
1457 rx_buflen
= ISER_RX_PAYLOAD_SIZE
;
1458 pr_debug("ISER req_buf: Using rx_dma: 0x%llx, rx_buflen: %d\n",
1462 ib_dma_sync_single_for_cpu(ib_dev
, rx_dma
, rx_buflen
, DMA_FROM_DEVICE
);
1464 hdr
= &desc
->iscsi_header
;
1465 pr_debug("iSCSI opcode: 0x%02x, ITT: 0x%08x, flags: 0x%02x dlen: %d\n",
1466 hdr
->opcode
, hdr
->itt
, hdr
->flags
,
1467 (int)(xfer_len
- ISER_HEADERS_LEN
));
1469 if ((char *)desc
== isert_conn
->login_req_buf
)
1470 isert_rx_login_req(desc
, xfer_len
- ISER_HEADERS_LEN
,
1473 isert_rx_do_work(desc
, isert_conn
);
1475 ib_dma_sync_single_for_device(ib_dev
, rx_dma
, rx_buflen
,
1478 isert_conn
->post_recv_buf_count
--;
1479 pr_debug("iSERT: Decremented post_recv_buf_count: %d\n",
1480 isert_conn
->post_recv_buf_count
);
1482 if ((char *)desc
== isert_conn
->login_req_buf
)
1485 outstanding
= isert_conn
->post_recv_buf_count
;
1486 if (outstanding
+ ISERT_MIN_POSTED_RX
<= ISERT_QP_MAX_RECV_DTOS
) {
1487 int err
, count
= min(ISERT_QP_MAX_RECV_DTOS
- outstanding
,
1488 ISERT_MIN_POSTED_RX
);
1489 err
= isert_post_recv(isert_conn
, count
);
1491 pr_err("isert_post_recv() count: %d failed, %d\n",
1498 isert_map_data_buf(struct isert_conn
*isert_conn
, struct isert_cmd
*isert_cmd
,
1499 struct scatterlist
*sg
, u32 nents
, u32 length
, u32 offset
,
1500 enum iser_ib_op_code op
, struct isert_data_buf
*data
)
1502 struct ib_device
*ib_dev
= isert_conn
->conn_cm_id
->device
;
1504 data
->dma_dir
= op
== ISER_IB_RDMA_WRITE
?
1505 DMA_TO_DEVICE
: DMA_FROM_DEVICE
;
1507 data
->len
= length
- offset
;
1508 data
->offset
= offset
;
1509 data
->sg_off
= data
->offset
/ PAGE_SIZE
;
1511 data
->sg
= &sg
[data
->sg_off
];
1512 data
->nents
= min_t(unsigned int, nents
- data
->sg_off
,
1513 ISCSI_ISER_SG_TABLESIZE
);
1514 data
->len
= min_t(unsigned int, data
->len
, ISCSI_ISER_SG_TABLESIZE
*
1517 data
->dma_nents
= ib_dma_map_sg(ib_dev
, data
->sg
, data
->nents
,
1519 if (unlikely(!data
->dma_nents
)) {
1520 pr_err("Cmd: unable to dma map SGs %p\n", sg
);
1524 pr_debug("Mapped cmd: %p count: %u sg: %p sg_nents: %u rdma_len %d\n",
1525 isert_cmd
, data
->dma_nents
, data
->sg
, data
->nents
, data
->len
);
1531 isert_unmap_data_buf(struct isert_conn
*isert_conn
, struct isert_data_buf
*data
)
1533 struct ib_device
*ib_dev
= isert_conn
->conn_cm_id
->device
;
1535 ib_dma_unmap_sg(ib_dev
, data
->sg
, data
->nents
, data
->dma_dir
);
1536 memset(data
, 0, sizeof(*data
));
1542 isert_unmap_cmd(struct isert_cmd
*isert_cmd
, struct isert_conn
*isert_conn
)
1544 struct isert_rdma_wr
*wr
= &isert_cmd
->rdma_wr
;
1546 pr_debug("isert_unmap_cmd: %p\n", isert_cmd
);
1549 pr_debug("isert_unmap_cmd: %p unmap_sg op\n", isert_cmd
);
1550 isert_unmap_data_buf(isert_conn
, &wr
->data
);
1554 pr_debug("isert_unmap_cmd: %p free send_wr\n", isert_cmd
);
1560 pr_debug("isert_unmap_cmd: %p free ib_sge\n", isert_cmd
);
1567 isert_unreg_rdma(struct isert_cmd
*isert_cmd
, struct isert_conn
*isert_conn
)
1569 struct isert_rdma_wr
*wr
= &isert_cmd
->rdma_wr
;
1570 LIST_HEAD(unmap_list
);
1572 pr_debug("unreg_fastreg_cmd: %p\n", isert_cmd
);
1575 pr_debug("unreg_fastreg_cmd: %p free fr_desc %p\n",
1576 isert_cmd
, wr
->fr_desc
);
1577 if (wr
->fr_desc
->ind
& ISERT_PROTECTED
) {
1578 isert_unmap_data_buf(isert_conn
, &wr
->prot
);
1579 wr
->fr_desc
->ind
&= ~ISERT_PROTECTED
;
1581 spin_lock_bh(&isert_conn
->conn_lock
);
1582 list_add_tail(&wr
->fr_desc
->list
, &isert_conn
->conn_fr_pool
);
1583 spin_unlock_bh(&isert_conn
->conn_lock
);
1588 pr_debug("unreg_fastreg_cmd: %p unmap_sg op\n", isert_cmd
);
1589 isert_unmap_data_buf(isert_conn
, &wr
->data
);
1597 isert_put_cmd(struct isert_cmd
*isert_cmd
, bool comp_err
)
1599 struct iscsi_cmd
*cmd
= isert_cmd
->iscsi_cmd
;
1600 struct isert_conn
*isert_conn
= isert_cmd
->conn
;
1601 struct iscsi_conn
*conn
= isert_conn
->conn
;
1602 struct isert_device
*device
= isert_conn
->conn_device
;
1604 pr_debug("Entering isert_put_cmd: %p\n", isert_cmd
);
1606 switch (cmd
->iscsi_opcode
) {
1607 case ISCSI_OP_SCSI_CMD
:
1608 spin_lock_bh(&conn
->cmd_lock
);
1609 if (!list_empty(&cmd
->i_conn_node
))
1610 list_del_init(&cmd
->i_conn_node
);
1611 spin_unlock_bh(&conn
->cmd_lock
);
1613 if (cmd
->data_direction
== DMA_TO_DEVICE
) {
1614 iscsit_stop_dataout_timer(cmd
);
1616 * Check for special case during comp_err where
1617 * WRITE_PENDING has been handed off from core,
1618 * but requires an extra target_put_sess_cmd()
1619 * before transport_generic_free_cmd() below.
1622 cmd
->se_cmd
.t_state
== TRANSPORT_WRITE_PENDING
) {
1623 struct se_cmd
*se_cmd
= &cmd
->se_cmd
;
1625 target_put_sess_cmd(se_cmd
->se_sess
, se_cmd
);
1629 device
->unreg_rdma_mem(isert_cmd
, isert_conn
);
1630 transport_generic_free_cmd(&cmd
->se_cmd
, 0);
1632 case ISCSI_OP_SCSI_TMFUNC
:
1633 spin_lock_bh(&conn
->cmd_lock
);
1634 if (!list_empty(&cmd
->i_conn_node
))
1635 list_del_init(&cmd
->i_conn_node
);
1636 spin_unlock_bh(&conn
->cmd_lock
);
1638 transport_generic_free_cmd(&cmd
->se_cmd
, 0);
1640 case ISCSI_OP_REJECT
:
1641 case ISCSI_OP_NOOP_OUT
:
1643 spin_lock_bh(&conn
->cmd_lock
);
1644 if (!list_empty(&cmd
->i_conn_node
))
1645 list_del_init(&cmd
->i_conn_node
);
1646 spin_unlock_bh(&conn
->cmd_lock
);
1649 * Handle special case for REJECT when iscsi_add_reject*() has
1650 * overwritten the original iscsi_opcode assignment, and the
1651 * associated cmd->se_cmd needs to be released.
1653 if (cmd
->se_cmd
.se_tfo
!= NULL
) {
1654 pr_debug("Calling transport_generic_free_cmd from"
1655 " isert_put_cmd for 0x%02x\n",
1657 transport_generic_free_cmd(&cmd
->se_cmd
, 0);
1664 iscsit_release_cmd(cmd
);
1670 isert_unmap_tx_desc(struct iser_tx_desc
*tx_desc
, struct ib_device
*ib_dev
)
1672 if (tx_desc
->dma_addr
!= 0) {
1673 pr_debug("Calling ib_dma_unmap_single for tx_desc->dma_addr\n");
1674 ib_dma_unmap_single(ib_dev
, tx_desc
->dma_addr
,
1675 ISER_HEADERS_LEN
, DMA_TO_DEVICE
);
1676 tx_desc
->dma_addr
= 0;
1681 isert_completion_put(struct iser_tx_desc
*tx_desc
, struct isert_cmd
*isert_cmd
,
1682 struct ib_device
*ib_dev
, bool comp_err
)
1684 if (isert_cmd
->pdu_buf_dma
!= 0) {
1685 pr_debug("Calling ib_dma_unmap_single for isert_cmd->pdu_buf_dma\n");
1686 ib_dma_unmap_single(ib_dev
, isert_cmd
->pdu_buf_dma
,
1687 isert_cmd
->pdu_buf_len
, DMA_TO_DEVICE
);
1688 isert_cmd
->pdu_buf_dma
= 0;
1691 isert_unmap_tx_desc(tx_desc
, ib_dev
);
1692 isert_put_cmd(isert_cmd
, comp_err
);
1696 isert_check_pi_status(struct se_cmd
*se_cmd
, struct ib_mr
*sig_mr
)
1698 struct ib_mr_status mr_status
;
1701 ret
= ib_check_mr_status(sig_mr
, IB_MR_CHECK_SIG_STATUS
, &mr_status
);
1703 pr_err("ib_check_mr_status failed, ret %d\n", ret
);
1704 goto fail_mr_status
;
1707 if (mr_status
.fail_status
& IB_MR_CHECK_SIG_STATUS
) {
1709 u32 block_size
= se_cmd
->se_dev
->dev_attrib
.block_size
+ 8;
1711 switch (mr_status
.sig_err
.err_type
) {
1712 case IB_SIG_BAD_GUARD
:
1713 se_cmd
->pi_err
= TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED
;
1715 case IB_SIG_BAD_REFTAG
:
1716 se_cmd
->pi_err
= TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED
;
1718 case IB_SIG_BAD_APPTAG
:
1719 se_cmd
->pi_err
= TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED
;
1722 sec_offset_err
= mr_status
.sig_err
.sig_err_offset
;
1723 do_div(sec_offset_err
, block_size
);
1724 se_cmd
->bad_sector
= sec_offset_err
+ se_cmd
->t_task_lba
;
1726 pr_err("isert: PI error found type %d at sector 0x%llx "
1727 "expected 0x%x vs actual 0x%x\n",
1728 mr_status
.sig_err
.err_type
,
1729 (unsigned long long)se_cmd
->bad_sector
,
1730 mr_status
.sig_err
.expected
,
1731 mr_status
.sig_err
.actual
);
1740 isert_completion_rdma_write(struct iser_tx_desc
*tx_desc
,
1741 struct isert_cmd
*isert_cmd
)
1743 struct isert_rdma_wr
*wr
= &isert_cmd
->rdma_wr
;
1744 struct iscsi_cmd
*cmd
= isert_cmd
->iscsi_cmd
;
1745 struct se_cmd
*se_cmd
= &cmd
->se_cmd
;
1746 struct isert_conn
*isert_conn
= isert_cmd
->conn
;
1747 struct isert_device
*device
= isert_conn
->conn_device
;
1750 if (wr
->fr_desc
&& wr
->fr_desc
->ind
& ISERT_PROTECTED
) {
1751 ret
= isert_check_pi_status(se_cmd
,
1752 wr
->fr_desc
->pi_ctx
->sig_mr
);
1753 wr
->fr_desc
->ind
&= ~ISERT_PROTECTED
;
1756 device
->unreg_rdma_mem(isert_cmd
, isert_conn
);
1757 wr
->send_wr_num
= 0;
1759 transport_send_check_condition_and_sense(se_cmd
,
1762 isert_put_response(isert_conn
->conn
, cmd
);
1766 isert_completion_rdma_read(struct iser_tx_desc
*tx_desc
,
1767 struct isert_cmd
*isert_cmd
)
1769 struct isert_rdma_wr
*wr
= &isert_cmd
->rdma_wr
;
1770 struct iscsi_cmd
*cmd
= isert_cmd
->iscsi_cmd
;
1771 struct se_cmd
*se_cmd
= &cmd
->se_cmd
;
1772 struct isert_conn
*isert_conn
= isert_cmd
->conn
;
1773 struct isert_device
*device
= isert_conn
->conn_device
;
1776 if (wr
->fr_desc
&& wr
->fr_desc
->ind
& ISERT_PROTECTED
) {
1777 ret
= isert_check_pi_status(se_cmd
,
1778 wr
->fr_desc
->pi_ctx
->sig_mr
);
1779 wr
->fr_desc
->ind
&= ~ISERT_PROTECTED
;
1782 iscsit_stop_dataout_timer(cmd
);
1783 device
->unreg_rdma_mem(isert_cmd
, isert_conn
);
1784 cmd
->write_data_done
= wr
->data
.len
;
1785 wr
->send_wr_num
= 0;
1787 pr_debug("Cmd: %p RDMA_READ comp calling execute_cmd\n", isert_cmd
);
1788 spin_lock_bh(&cmd
->istate_lock
);
1789 cmd
->cmd_flags
|= ICF_GOT_LAST_DATAOUT
;
1790 cmd
->i_state
= ISTATE_RECEIVED_LAST_DATAOUT
;
1791 spin_unlock_bh(&cmd
->istate_lock
);
1794 transport_send_check_condition_and_sense(se_cmd
,
1797 target_execute_cmd(se_cmd
);
1801 isert_do_control_comp(struct work_struct
*work
)
1803 struct isert_cmd
*isert_cmd
= container_of(work
,
1804 struct isert_cmd
, comp_work
);
1805 struct isert_conn
*isert_conn
= isert_cmd
->conn
;
1806 struct ib_device
*ib_dev
= isert_conn
->conn_cm_id
->device
;
1807 struct iscsi_cmd
*cmd
= isert_cmd
->iscsi_cmd
;
1809 switch (cmd
->i_state
) {
1810 case ISTATE_SEND_TASKMGTRSP
:
1811 pr_debug("Calling iscsit_tmr_post_handler >>>>>>>>>>>>>>>>>\n");
1813 atomic_dec(&isert_conn
->post_send_buf_count
);
1814 iscsit_tmr_post_handler(cmd
, cmd
->conn
);
1816 cmd
->i_state
= ISTATE_SENT_STATUS
;
1817 isert_completion_put(&isert_cmd
->tx_desc
, isert_cmd
, ib_dev
, false);
1819 case ISTATE_SEND_REJECT
:
1820 pr_debug("Got isert_do_control_comp ISTATE_SEND_REJECT: >>>\n");
1821 atomic_dec(&isert_conn
->post_send_buf_count
);
1823 cmd
->i_state
= ISTATE_SENT_STATUS
;
1824 isert_completion_put(&isert_cmd
->tx_desc
, isert_cmd
, ib_dev
, false);
1826 case ISTATE_SEND_LOGOUTRSP
:
1827 pr_debug("Calling iscsit_logout_post_handler >>>>>>>>>>>>>>\n");
1829 atomic_dec(&isert_conn
->post_send_buf_count
);
1830 iscsit_logout_post_handler(cmd
, cmd
->conn
);
1832 case ISTATE_SEND_TEXTRSP
:
1833 atomic_dec(&isert_conn
->post_send_buf_count
);
1834 cmd
->i_state
= ISTATE_SENT_STATUS
;
1835 isert_completion_put(&isert_cmd
->tx_desc
, isert_cmd
, ib_dev
, false);
1838 pr_err("Unknown do_control_comp i_state %d\n", cmd
->i_state
);
1845 isert_response_completion(struct iser_tx_desc
*tx_desc
,
1846 struct isert_cmd
*isert_cmd
,
1847 struct isert_conn
*isert_conn
,
1848 struct ib_device
*ib_dev
)
1850 struct iscsi_cmd
*cmd
= isert_cmd
->iscsi_cmd
;
1851 struct isert_rdma_wr
*wr
= &isert_cmd
->rdma_wr
;
1853 if (cmd
->i_state
== ISTATE_SEND_TASKMGTRSP
||
1854 cmd
->i_state
== ISTATE_SEND_LOGOUTRSP
||
1855 cmd
->i_state
== ISTATE_SEND_REJECT
||
1856 cmd
->i_state
== ISTATE_SEND_TEXTRSP
) {
1857 isert_unmap_tx_desc(tx_desc
, ib_dev
);
1859 INIT_WORK(&isert_cmd
->comp_work
, isert_do_control_comp
);
1860 queue_work(isert_comp_wq
, &isert_cmd
->comp_work
);
1865 * If send_wr_num is 0 this means that we got
1866 * RDMA completion and we cleared it and we should
1867 * simply decrement the response post. else the
1868 * response is incorporated in send_wr_num, just
1871 if (wr
->send_wr_num
)
1872 atomic_sub(wr
->send_wr_num
, &isert_conn
->post_send_buf_count
);
1874 atomic_dec(&isert_conn
->post_send_buf_count
);
1876 cmd
->i_state
= ISTATE_SENT_STATUS
;
1877 isert_completion_put(tx_desc
, isert_cmd
, ib_dev
, false);
1881 __isert_send_completion(struct iser_tx_desc
*tx_desc
,
1882 struct isert_conn
*isert_conn
)
1884 struct ib_device
*ib_dev
= isert_conn
->conn_cm_id
->device
;
1885 struct isert_cmd
*isert_cmd
= tx_desc
->isert_cmd
;
1886 struct isert_rdma_wr
*wr
;
1889 atomic_dec(&isert_conn
->post_send_buf_count
);
1890 isert_unmap_tx_desc(tx_desc
, ib_dev
);
1893 wr
= &isert_cmd
->rdma_wr
;
1895 switch (wr
->iser_ib_op
) {
1897 pr_err("isert_send_completion: Got ISER_IB_RECV\n");
1901 pr_debug("isert_send_completion: Got ISER_IB_SEND\n");
1902 isert_response_completion(tx_desc
, isert_cmd
,
1903 isert_conn
, ib_dev
);
1905 case ISER_IB_RDMA_WRITE
:
1906 pr_debug("isert_send_completion: Got ISER_IB_RDMA_WRITE\n");
1907 atomic_sub(wr
->send_wr_num
, &isert_conn
->post_send_buf_count
);
1908 isert_completion_rdma_write(tx_desc
, isert_cmd
);
1910 case ISER_IB_RDMA_READ
:
1911 pr_debug("isert_send_completion: Got ISER_IB_RDMA_READ:\n");
1913 atomic_sub(wr
->send_wr_num
, &isert_conn
->post_send_buf_count
);
1914 isert_completion_rdma_read(tx_desc
, isert_cmd
);
1917 pr_err("Unknown wr->iser_ib_op: 0x%02x\n", wr
->iser_ib_op
);
1924 isert_send_completion(struct iser_tx_desc
*tx_desc
,
1925 struct isert_conn
*isert_conn
)
1927 struct llist_node
*llnode
= tx_desc
->comp_llnode_batch
;
1928 struct iser_tx_desc
*t
;
1930 * Drain coalesced completion llist starting from comp_llnode_batch
1931 * setup in isert_init_send_wr(), and then complete trailing tx_desc.
1934 t
= llist_entry(llnode
, struct iser_tx_desc
, comp_llnode
);
1935 llnode
= llist_next(llnode
);
1936 __isert_send_completion(t
, isert_conn
);
1938 __isert_send_completion(tx_desc
, isert_conn
);
1942 isert_cq_drain_comp_llist(struct isert_conn
*isert_conn
, struct ib_device
*ib_dev
)
1944 struct llist_node
*llnode
;
1945 struct isert_rdma_wr
*wr
;
1946 struct iser_tx_desc
*t
;
1948 mutex_lock(&isert_conn
->conn_mutex
);
1949 llnode
= llist_del_all(&isert_conn
->conn_comp_llist
);
1950 isert_conn
->conn_comp_batch
= 0;
1951 mutex_unlock(&isert_conn
->conn_mutex
);
1954 t
= llist_entry(llnode
, struct iser_tx_desc
, comp_llnode
);
1955 llnode
= llist_next(llnode
);
1956 wr
= &t
->isert_cmd
->rdma_wr
;
1959 * If send_wr_num is 0 this means that we got
1960 * RDMA completion and we cleared it and we should
1961 * simply decrement the response post. else the
1962 * response is incorporated in send_wr_num, just
1965 if (wr
->send_wr_num
)
1966 atomic_sub(wr
->send_wr_num
,
1967 &isert_conn
->post_send_buf_count
);
1969 atomic_dec(&isert_conn
->post_send_buf_count
);
1971 isert_completion_put(t
, t
->isert_cmd
, ib_dev
, true);
1976 isert_cq_tx_comp_err(struct iser_tx_desc
*tx_desc
, struct isert_conn
*isert_conn
)
1978 struct ib_device
*ib_dev
= isert_conn
->conn_cm_id
->device
;
1979 struct isert_cmd
*isert_cmd
= tx_desc
->isert_cmd
;
1980 struct llist_node
*llnode
= tx_desc
->comp_llnode_batch
;
1981 struct isert_rdma_wr
*wr
;
1982 struct iser_tx_desc
*t
;
1985 t
= llist_entry(llnode
, struct iser_tx_desc
, comp_llnode
);
1986 llnode
= llist_next(llnode
);
1987 wr
= &t
->isert_cmd
->rdma_wr
;
1990 * If send_wr_num is 0 this means that we got
1991 * RDMA completion and we cleared it and we should
1992 * simply decrement the response post. else the
1993 * response is incorporated in send_wr_num, just
1996 if (wr
->send_wr_num
)
1997 atomic_sub(wr
->send_wr_num
,
1998 &isert_conn
->post_send_buf_count
);
2000 atomic_dec(&isert_conn
->post_send_buf_count
);
2002 isert_completion_put(t
, t
->isert_cmd
, ib_dev
, true);
2004 tx_desc
->comp_llnode_batch
= NULL
;
2007 isert_unmap_tx_desc(tx_desc
, ib_dev
);
2009 isert_completion_put(tx_desc
, isert_cmd
, ib_dev
, true);
2013 isert_cq_rx_comp_err(struct isert_conn
*isert_conn
)
2015 struct ib_device
*ib_dev
= isert_conn
->conn_cm_id
->device
;
2016 struct iscsi_conn
*conn
= isert_conn
->conn
;
2018 if (isert_conn
->post_recv_buf_count
)
2021 isert_cq_drain_comp_llist(isert_conn
, ib_dev
);
2024 target_sess_cmd_list_set_waiting(conn
->sess
->se_sess
);
2025 target_wait_for_sess_cmds(conn
->sess
->se_sess
);
2028 while (atomic_read(&isert_conn
->post_send_buf_count
))
2031 mutex_lock(&isert_conn
->conn_mutex
);
2032 isert_conn
->state
= ISER_CONN_DOWN
;
2033 mutex_unlock(&isert_conn
->conn_mutex
);
2035 iscsit_cause_connection_reinstatement(isert_conn
->conn
, 0);
2037 complete(&isert_conn
->conn_wait_comp_err
);
2041 isert_cq_tx_work(struct work_struct
*work
)
2043 struct isert_cq_desc
*cq_desc
= container_of(work
,
2044 struct isert_cq_desc
, cq_tx_work
);
2045 struct isert_device
*device
= cq_desc
->device
;
2046 int cq_index
= cq_desc
->cq_index
;
2047 struct ib_cq
*tx_cq
= device
->dev_tx_cq
[cq_index
];
2048 struct isert_conn
*isert_conn
;
2049 struct iser_tx_desc
*tx_desc
;
2052 while (ib_poll_cq(tx_cq
, 1, &wc
) == 1) {
2053 tx_desc
= (struct iser_tx_desc
*)(unsigned long)wc
.wr_id
;
2054 isert_conn
= wc
.qp
->qp_context
;
2056 if (wc
.status
== IB_WC_SUCCESS
) {
2057 isert_send_completion(tx_desc
, isert_conn
);
2059 pr_debug("TX wc.status != IB_WC_SUCCESS >>>>>>>>>>>>>>\n");
2060 pr_debug("TX wc.status: 0x%08x\n", wc
.status
);
2061 pr_debug("TX wc.vendor_err: 0x%08x\n", wc
.vendor_err
);
2063 if (wc
.wr_id
!= ISER_FASTREG_LI_WRID
) {
2064 if (tx_desc
->llnode_active
)
2067 atomic_dec(&isert_conn
->post_send_buf_count
);
2068 isert_cq_tx_comp_err(tx_desc
, isert_conn
);
2073 ib_req_notify_cq(tx_cq
, IB_CQ_NEXT_COMP
);
2077 isert_cq_tx_callback(struct ib_cq
*cq
, void *context
)
2079 struct isert_cq_desc
*cq_desc
= (struct isert_cq_desc
*)context
;
2081 queue_work(isert_comp_wq
, &cq_desc
->cq_tx_work
);
2085 isert_cq_rx_work(struct work_struct
*work
)
2087 struct isert_cq_desc
*cq_desc
= container_of(work
,
2088 struct isert_cq_desc
, cq_rx_work
);
2089 struct isert_device
*device
= cq_desc
->device
;
2090 int cq_index
= cq_desc
->cq_index
;
2091 struct ib_cq
*rx_cq
= device
->dev_rx_cq
[cq_index
];
2092 struct isert_conn
*isert_conn
;
2093 struct iser_rx_desc
*rx_desc
;
2095 unsigned long xfer_len
;
2097 while (ib_poll_cq(rx_cq
, 1, &wc
) == 1) {
2098 rx_desc
= (struct iser_rx_desc
*)(unsigned long)wc
.wr_id
;
2099 isert_conn
= wc
.qp
->qp_context
;
2101 if (wc
.status
== IB_WC_SUCCESS
) {
2102 xfer_len
= (unsigned long)wc
.byte_len
;
2103 isert_rx_completion(rx_desc
, isert_conn
, xfer_len
);
2105 pr_debug("RX wc.status != IB_WC_SUCCESS >>>>>>>>>>>>>>\n");
2106 if (wc
.status
!= IB_WC_WR_FLUSH_ERR
) {
2107 pr_debug("RX wc.status: 0x%08x\n", wc
.status
);
2108 pr_debug("RX wc.vendor_err: 0x%08x\n",
2111 isert_conn
->post_recv_buf_count
--;
2112 isert_cq_rx_comp_err(isert_conn
);
2116 ib_req_notify_cq(rx_cq
, IB_CQ_NEXT_COMP
);
2120 isert_cq_rx_callback(struct ib_cq
*cq
, void *context
)
2122 struct isert_cq_desc
*cq_desc
= (struct isert_cq_desc
*)context
;
2124 queue_work(isert_rx_wq
, &cq_desc
->cq_rx_work
);
2128 isert_post_response(struct isert_conn
*isert_conn
, struct isert_cmd
*isert_cmd
)
2130 struct ib_send_wr
*wr_failed
;
2133 atomic_inc(&isert_conn
->post_send_buf_count
);
2135 ret
= ib_post_send(isert_conn
->conn_qp
, &isert_cmd
->tx_desc
.send_wr
,
2138 pr_err("ib_post_send failed with %d\n", ret
);
2139 atomic_dec(&isert_conn
->post_send_buf_count
);
2146 isert_put_response(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
)
2148 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
2149 struct isert_conn
*isert_conn
= (struct isert_conn
*)conn
->context
;
2150 struct ib_send_wr
*send_wr
= &isert_cmd
->tx_desc
.send_wr
;
2151 struct iscsi_scsi_rsp
*hdr
= (struct iscsi_scsi_rsp
*)
2152 &isert_cmd
->tx_desc
.iscsi_header
;
2154 isert_create_send_desc(isert_conn
, isert_cmd
, &isert_cmd
->tx_desc
);
2155 iscsit_build_rsp_pdu(cmd
, conn
, true, hdr
);
2156 isert_init_tx_hdrs(isert_conn
, &isert_cmd
->tx_desc
);
2158 * Attach SENSE DATA payload to iSCSI Response PDU
2160 if (cmd
->se_cmd
.sense_buffer
&&
2161 ((cmd
->se_cmd
.se_cmd_flags
& SCF_TRANSPORT_TASK_SENSE
) ||
2162 (cmd
->se_cmd
.se_cmd_flags
& SCF_EMULATED_TASK_SENSE
))) {
2163 struct ib_device
*ib_dev
= isert_conn
->conn_cm_id
->device
;
2164 struct ib_sge
*tx_dsg
= &isert_cmd
->tx_desc
.tx_sg
[1];
2165 u32 padding
, pdu_len
;
2167 put_unaligned_be16(cmd
->se_cmd
.scsi_sense_length
,
2169 cmd
->se_cmd
.scsi_sense_length
+= sizeof(__be16
);
2171 padding
= -(cmd
->se_cmd
.scsi_sense_length
) & 3;
2172 hton24(hdr
->dlength
, (u32
)cmd
->se_cmd
.scsi_sense_length
);
2173 pdu_len
= cmd
->se_cmd
.scsi_sense_length
+ padding
;
2175 isert_cmd
->pdu_buf_dma
= ib_dma_map_single(ib_dev
,
2176 (void *)cmd
->sense_buffer
, pdu_len
,
2179 isert_cmd
->pdu_buf_len
= pdu_len
;
2180 tx_dsg
->addr
= isert_cmd
->pdu_buf_dma
;
2181 tx_dsg
->length
= pdu_len
;
2182 tx_dsg
->lkey
= isert_conn
->conn_mr
->lkey
;
2183 isert_cmd
->tx_desc
.num_sge
= 2;
2186 isert_init_send_wr(isert_conn
, isert_cmd
, send_wr
, true);
2188 pr_debug("Posting SCSI Response IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n");
2190 return isert_post_response(isert_conn
, isert_cmd
);
2194 isert_aborted_task(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
)
2196 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
2197 struct isert_conn
*isert_conn
= (struct isert_conn
*)conn
->context
;
2198 struct isert_device
*device
= isert_conn
->conn_device
;
2200 spin_lock_bh(&conn
->cmd_lock
);
2201 if (!list_empty(&cmd
->i_conn_node
))
2202 list_del_init(&cmd
->i_conn_node
);
2203 spin_unlock_bh(&conn
->cmd_lock
);
2205 if (cmd
->data_direction
== DMA_TO_DEVICE
)
2206 iscsit_stop_dataout_timer(cmd
);
2208 device
->unreg_rdma_mem(isert_cmd
, isert_conn
);
2211 static enum target_prot_op
2212 isert_get_sup_prot_ops(struct iscsi_conn
*conn
)
2214 struct isert_conn
*isert_conn
= (struct isert_conn
*)conn
->context
;
2215 struct isert_device
*device
= isert_conn
->conn_device
;
2217 if (device
->pi_capable
)
2218 return TARGET_PROT_ALL
;
2220 return TARGET_PROT_NORMAL
;
2224 isert_put_nopin(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
,
2225 bool nopout_response
)
2227 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
2228 struct isert_conn
*isert_conn
= (struct isert_conn
*)conn
->context
;
2229 struct ib_send_wr
*send_wr
= &isert_cmd
->tx_desc
.send_wr
;
2231 isert_create_send_desc(isert_conn
, isert_cmd
, &isert_cmd
->tx_desc
);
2232 iscsit_build_nopin_rsp(cmd
, conn
, (struct iscsi_nopin
*)
2233 &isert_cmd
->tx_desc
.iscsi_header
,
2235 isert_init_tx_hdrs(isert_conn
, &isert_cmd
->tx_desc
);
2236 isert_init_send_wr(isert_conn
, isert_cmd
, send_wr
, false);
2238 pr_debug("Posting NOPIN Response IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n");
2240 return isert_post_response(isert_conn
, isert_cmd
);
2244 isert_put_logout_rsp(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
2246 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
2247 struct isert_conn
*isert_conn
= (struct isert_conn
*)conn
->context
;
2248 struct ib_send_wr
*send_wr
= &isert_cmd
->tx_desc
.send_wr
;
2250 isert_create_send_desc(isert_conn
, isert_cmd
, &isert_cmd
->tx_desc
);
2251 iscsit_build_logout_rsp(cmd
, conn
, (struct iscsi_logout_rsp
*)
2252 &isert_cmd
->tx_desc
.iscsi_header
);
2253 isert_init_tx_hdrs(isert_conn
, &isert_cmd
->tx_desc
);
2254 isert_init_send_wr(isert_conn
, isert_cmd
, send_wr
, false);
2256 pr_debug("Posting Logout Response IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n");
2258 return isert_post_response(isert_conn
, isert_cmd
);
2262 isert_put_tm_rsp(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
2264 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
2265 struct isert_conn
*isert_conn
= (struct isert_conn
*)conn
->context
;
2266 struct ib_send_wr
*send_wr
= &isert_cmd
->tx_desc
.send_wr
;
2268 isert_create_send_desc(isert_conn
, isert_cmd
, &isert_cmd
->tx_desc
);
2269 iscsit_build_task_mgt_rsp(cmd
, conn
, (struct iscsi_tm_rsp
*)
2270 &isert_cmd
->tx_desc
.iscsi_header
);
2271 isert_init_tx_hdrs(isert_conn
, &isert_cmd
->tx_desc
);
2272 isert_init_send_wr(isert_conn
, isert_cmd
, send_wr
, false);
2274 pr_debug("Posting Task Management Response IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n");
2276 return isert_post_response(isert_conn
, isert_cmd
);
2280 isert_put_reject(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
2282 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
2283 struct isert_conn
*isert_conn
= (struct isert_conn
*)conn
->context
;
2284 struct ib_send_wr
*send_wr
= &isert_cmd
->tx_desc
.send_wr
;
2285 struct ib_device
*ib_dev
= isert_conn
->conn_cm_id
->device
;
2286 struct ib_sge
*tx_dsg
= &isert_cmd
->tx_desc
.tx_sg
[1];
2287 struct iscsi_reject
*hdr
=
2288 (struct iscsi_reject
*)&isert_cmd
->tx_desc
.iscsi_header
;
2290 isert_create_send_desc(isert_conn
, isert_cmd
, &isert_cmd
->tx_desc
);
2291 iscsit_build_reject(cmd
, conn
, hdr
);
2292 isert_init_tx_hdrs(isert_conn
, &isert_cmd
->tx_desc
);
2294 hton24(hdr
->dlength
, ISCSI_HDR_LEN
);
2295 isert_cmd
->pdu_buf_dma
= ib_dma_map_single(ib_dev
,
2296 (void *)cmd
->buf_ptr
, ISCSI_HDR_LEN
,
2298 isert_cmd
->pdu_buf_len
= ISCSI_HDR_LEN
;
2299 tx_dsg
->addr
= isert_cmd
->pdu_buf_dma
;
2300 tx_dsg
->length
= ISCSI_HDR_LEN
;
2301 tx_dsg
->lkey
= isert_conn
->conn_mr
->lkey
;
2302 isert_cmd
->tx_desc
.num_sge
= 2;
2304 isert_init_send_wr(isert_conn
, isert_cmd
, send_wr
, false);
2306 pr_debug("Posting Reject IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n");
2308 return isert_post_response(isert_conn
, isert_cmd
);
2312 isert_put_text_rsp(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
2314 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
2315 struct isert_conn
*isert_conn
= (struct isert_conn
*)conn
->context
;
2316 struct ib_send_wr
*send_wr
= &isert_cmd
->tx_desc
.send_wr
;
2317 struct iscsi_text_rsp
*hdr
=
2318 (struct iscsi_text_rsp
*)&isert_cmd
->tx_desc
.iscsi_header
;
2322 isert_create_send_desc(isert_conn
, isert_cmd
, &isert_cmd
->tx_desc
);
2323 rc
= iscsit_build_text_rsp(cmd
, conn
, hdr
, ISCSI_INFINIBAND
);
2328 isert_init_tx_hdrs(isert_conn
, &isert_cmd
->tx_desc
);
2331 struct ib_device
*ib_dev
= isert_conn
->conn_cm_id
->device
;
2332 struct ib_sge
*tx_dsg
= &isert_cmd
->tx_desc
.tx_sg
[1];
2333 void *txt_rsp_buf
= cmd
->buf_ptr
;
2335 isert_cmd
->pdu_buf_dma
= ib_dma_map_single(ib_dev
,
2336 txt_rsp_buf
, txt_rsp_len
, DMA_TO_DEVICE
);
2338 isert_cmd
->pdu_buf_len
= txt_rsp_len
;
2339 tx_dsg
->addr
= isert_cmd
->pdu_buf_dma
;
2340 tx_dsg
->length
= txt_rsp_len
;
2341 tx_dsg
->lkey
= isert_conn
->conn_mr
->lkey
;
2342 isert_cmd
->tx_desc
.num_sge
= 2;
2344 isert_init_send_wr(isert_conn
, isert_cmd
, send_wr
, false);
2346 pr_debug("Posting Text Response IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n");
2348 return isert_post_response(isert_conn
, isert_cmd
);
2352 isert_build_rdma_wr(struct isert_conn
*isert_conn
, struct isert_cmd
*isert_cmd
,
2353 struct ib_sge
*ib_sge
, struct ib_send_wr
*send_wr
,
2354 u32 data_left
, u32 offset
)
2356 struct iscsi_cmd
*cmd
= isert_cmd
->iscsi_cmd
;
2357 struct scatterlist
*sg_start
, *tmp_sg
;
2358 struct ib_device
*ib_dev
= isert_conn
->conn_cm_id
->device
;
2359 u32 sg_off
, page_off
;
2360 int i
= 0, sg_nents
;
2362 sg_off
= offset
/ PAGE_SIZE
;
2363 sg_start
= &cmd
->se_cmd
.t_data_sg
[sg_off
];
2364 sg_nents
= min(cmd
->se_cmd
.t_data_nents
- sg_off
, isert_conn
->max_sge
);
2365 page_off
= offset
% PAGE_SIZE
;
2367 send_wr
->sg_list
= ib_sge
;
2368 send_wr
->num_sge
= sg_nents
;
2369 send_wr
->wr_id
= (unsigned long)&isert_cmd
->tx_desc
;
2371 * Perform mapping of TCM scatterlist memory ib_sge dma_addr.
2373 for_each_sg(sg_start
, tmp_sg
, sg_nents
, i
) {
2374 pr_debug("ISER RDMA from SGL dma_addr: 0x%16llx dma_len: %u, page_off: %u\n",
2375 (unsigned long long)tmp_sg
->dma_address
,
2376 tmp_sg
->length
, page_off
);
2378 ib_sge
->addr
= ib_sg_dma_address(ib_dev
, tmp_sg
) + page_off
;
2379 ib_sge
->length
= min_t(u32
, data_left
,
2380 ib_sg_dma_len(ib_dev
, tmp_sg
) - page_off
);
2381 ib_sge
->lkey
= isert_conn
->conn_mr
->lkey
;
2383 pr_debug("RDMA ib_sge: addr: 0x%16llx length: %u lkey: %08x\n",
2384 ib_sge
->addr
, ib_sge
->length
, ib_sge
->lkey
);
2386 data_left
-= ib_sge
->length
;
2388 pr_debug("Incrementing ib_sge pointer to %p\n", ib_sge
);
2391 pr_debug("Set outgoing sg_list: %p num_sg: %u from TCM SGLs\n",
2392 send_wr
->sg_list
, send_wr
->num_sge
);
2398 isert_map_rdma(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
2399 struct isert_rdma_wr
*wr
)
2401 struct se_cmd
*se_cmd
= &cmd
->se_cmd
;
2402 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
2403 struct isert_conn
*isert_conn
= (struct isert_conn
*)conn
->context
;
2404 struct isert_data_buf
*data
= &wr
->data
;
2405 struct ib_send_wr
*send_wr
;
2406 struct ib_sge
*ib_sge
;
2407 u32 offset
, data_len
, data_left
, rdma_write_max
, va_offset
= 0;
2408 int ret
= 0, i
, ib_sge_cnt
;
2410 isert_cmd
->tx_desc
.isert_cmd
= isert_cmd
;
2412 offset
= wr
->iser_ib_op
== ISER_IB_RDMA_READ
? cmd
->write_data_done
: 0;
2413 ret
= isert_map_data_buf(isert_conn
, isert_cmd
, se_cmd
->t_data_sg
,
2414 se_cmd
->t_data_nents
, se_cmd
->data_length
,
2415 offset
, wr
->iser_ib_op
, &wr
->data
);
2419 data_left
= data
->len
;
2420 offset
= data
->offset
;
2422 ib_sge
= kzalloc(sizeof(struct ib_sge
) * data
->nents
, GFP_KERNEL
);
2424 pr_warn("Unable to allocate ib_sge\n");
2428 wr
->ib_sge
= ib_sge
;
2430 wr
->send_wr_num
= DIV_ROUND_UP(data
->nents
, isert_conn
->max_sge
);
2431 wr
->send_wr
= kzalloc(sizeof(struct ib_send_wr
) * wr
->send_wr_num
,
2434 pr_debug("Unable to allocate wr->send_wr\n");
2439 wr
->isert_cmd
= isert_cmd
;
2440 rdma_write_max
= isert_conn
->max_sge
* PAGE_SIZE
;
2442 for (i
= 0; i
< wr
->send_wr_num
; i
++) {
2443 send_wr
= &isert_cmd
->rdma_wr
.send_wr
[i
];
2444 data_len
= min(data_left
, rdma_write_max
);
2446 send_wr
->send_flags
= 0;
2447 if (wr
->iser_ib_op
== ISER_IB_RDMA_WRITE
) {
2448 send_wr
->opcode
= IB_WR_RDMA_WRITE
;
2449 send_wr
->wr
.rdma
.remote_addr
= isert_cmd
->read_va
+ offset
;
2450 send_wr
->wr
.rdma
.rkey
= isert_cmd
->read_stag
;
2451 if (i
+ 1 == wr
->send_wr_num
)
2452 send_wr
->next
= &isert_cmd
->tx_desc
.send_wr
;
2454 send_wr
->next
= &wr
->send_wr
[i
+ 1];
2456 send_wr
->opcode
= IB_WR_RDMA_READ
;
2457 send_wr
->wr
.rdma
.remote_addr
= isert_cmd
->write_va
+ va_offset
;
2458 send_wr
->wr
.rdma
.rkey
= isert_cmd
->write_stag
;
2459 if (i
+ 1 == wr
->send_wr_num
)
2460 send_wr
->send_flags
= IB_SEND_SIGNALED
;
2462 send_wr
->next
= &wr
->send_wr
[i
+ 1];
2465 ib_sge_cnt
= isert_build_rdma_wr(isert_conn
, isert_cmd
, ib_sge
,
2466 send_wr
, data_len
, offset
);
2467 ib_sge
+= ib_sge_cnt
;
2470 va_offset
+= data_len
;
2471 data_left
-= data_len
;
2476 isert_unmap_data_buf(isert_conn
, data
);
2482 isert_map_fr_pagelist(struct ib_device
*ib_dev
,
2483 struct scatterlist
*sg_start
, int sg_nents
, u64
*fr_pl
)
2485 u64 start_addr
, end_addr
, page
, chunk_start
= 0;
2486 struct scatterlist
*tmp_sg
;
2487 int i
= 0, new_chunk
, last_ent
, n_pages
;
2491 last_ent
= sg_nents
- 1;
2492 for_each_sg(sg_start
, tmp_sg
, sg_nents
, i
) {
2493 start_addr
= ib_sg_dma_address(ib_dev
, tmp_sg
);
2495 chunk_start
= start_addr
;
2496 end_addr
= start_addr
+ ib_sg_dma_len(ib_dev
, tmp_sg
);
2498 pr_debug("SGL[%d] dma_addr: 0x%16llx len: %u\n",
2499 i
, (unsigned long long)tmp_sg
->dma_address
,
2502 if ((end_addr
& ~PAGE_MASK
) && i
< last_ent
) {
2508 page
= chunk_start
& PAGE_MASK
;
2510 fr_pl
[n_pages
++] = page
;
2511 pr_debug("Mapped page_list[%d] page_addr: 0x%16llx\n",
2514 } while (page
< end_addr
);
2521 isert_fast_reg_mr(struct isert_conn
*isert_conn
,
2522 struct fast_reg_descriptor
*fr_desc
,
2523 struct isert_data_buf
*mem
,
2524 enum isert_indicator ind
,
2527 struct ib_device
*ib_dev
= isert_conn
->conn_cm_id
->device
;
2529 struct ib_fast_reg_page_list
*frpl
;
2530 struct ib_send_wr fr_wr
, inv_wr
;
2531 struct ib_send_wr
*bad_wr
, *wr
= NULL
;
2532 int ret
, pagelist_len
;
2536 if (mem
->dma_nents
== 1) {
2537 sge
->lkey
= isert_conn
->conn_mr
->lkey
;
2538 sge
->addr
= ib_sg_dma_address(ib_dev
, &mem
->sg
[0]);
2539 sge
->length
= ib_sg_dma_len(ib_dev
, &mem
->sg
[0]);
2540 pr_debug("%s:%d sge: addr: 0x%llx length: %u lkey: %x\n",
2541 __func__
, __LINE__
, sge
->addr
, sge
->length
,
2546 if (ind
== ISERT_DATA_KEY_VALID
) {
2547 /* Registering data buffer */
2548 mr
= fr_desc
->data_mr
;
2549 frpl
= fr_desc
->data_frpl
;
2551 /* Registering protection buffer */
2552 mr
= fr_desc
->pi_ctx
->prot_mr
;
2553 frpl
= fr_desc
->pi_ctx
->prot_frpl
;
2556 page_off
= mem
->offset
% PAGE_SIZE
;
2558 pr_debug("Use fr_desc %p sg_nents %d offset %u\n",
2559 fr_desc
, mem
->nents
, mem
->offset
);
2561 pagelist_len
= isert_map_fr_pagelist(ib_dev
, mem
->sg
, mem
->nents
,
2562 &frpl
->page_list
[0]);
2564 if (!(fr_desc
->ind
& ISERT_DATA_KEY_VALID
)) {
2565 memset(&inv_wr
, 0, sizeof(inv_wr
));
2566 inv_wr
.wr_id
= ISER_FASTREG_LI_WRID
;
2567 inv_wr
.opcode
= IB_WR_LOCAL_INV
;
2568 inv_wr
.ex
.invalidate_rkey
= mr
->rkey
;
2571 key
= (u8
)(mr
->rkey
& 0x000000FF);
2572 ib_update_fast_reg_key(mr
, ++key
);
2575 /* Prepare FASTREG WR */
2576 memset(&fr_wr
, 0, sizeof(fr_wr
));
2577 fr_wr
.wr_id
= ISER_FASTREG_LI_WRID
;
2578 fr_wr
.opcode
= IB_WR_FAST_REG_MR
;
2579 fr_wr
.wr
.fast_reg
.iova_start
= frpl
->page_list
[0] + page_off
;
2580 fr_wr
.wr
.fast_reg
.page_list
= frpl
;
2581 fr_wr
.wr
.fast_reg
.page_list_len
= pagelist_len
;
2582 fr_wr
.wr
.fast_reg
.page_shift
= PAGE_SHIFT
;
2583 fr_wr
.wr
.fast_reg
.length
= mem
->len
;
2584 fr_wr
.wr
.fast_reg
.rkey
= mr
->rkey
;
2585 fr_wr
.wr
.fast_reg
.access_flags
= IB_ACCESS_LOCAL_WRITE
;
2592 ret
= ib_post_send(isert_conn
->conn_qp
, wr
, &bad_wr
);
2594 pr_err("fast registration failed, ret:%d\n", ret
);
2597 fr_desc
->ind
&= ~ind
;
2599 sge
->lkey
= mr
->lkey
;
2600 sge
->addr
= frpl
->page_list
[0] + page_off
;
2601 sge
->length
= mem
->len
;
2603 pr_debug("%s:%d sge: addr: 0x%llx length: %u lkey: %x\n",
2604 __func__
, __LINE__
, sge
->addr
, sge
->length
,
2610 static inline enum ib_t10_dif_type
2611 se2ib_prot_type(enum target_prot_type prot_type
)
2613 switch (prot_type
) {
2614 case TARGET_DIF_TYPE0_PROT
:
2615 return IB_T10DIF_NONE
;
2616 case TARGET_DIF_TYPE1_PROT
:
2617 return IB_T10DIF_TYPE1
;
2618 case TARGET_DIF_TYPE2_PROT
:
2619 return IB_T10DIF_TYPE2
;
2620 case TARGET_DIF_TYPE3_PROT
:
2621 return IB_T10DIF_TYPE3
;
2623 return IB_T10DIF_NONE
;
2628 isert_set_sig_attrs(struct se_cmd
*se_cmd
, struct ib_sig_attrs
*sig_attrs
)
2630 enum ib_t10_dif_type ib_prot_type
= se2ib_prot_type(se_cmd
->prot_type
);
2632 sig_attrs
->mem
.sig_type
= IB_SIG_TYPE_T10_DIF
;
2633 sig_attrs
->wire
.sig_type
= IB_SIG_TYPE_T10_DIF
;
2634 sig_attrs
->mem
.sig
.dif
.pi_interval
=
2635 se_cmd
->se_dev
->dev_attrib
.block_size
;
2636 sig_attrs
->wire
.sig
.dif
.pi_interval
=
2637 se_cmd
->se_dev
->dev_attrib
.block_size
;
2639 switch (se_cmd
->prot_op
) {
2640 case TARGET_PROT_DIN_INSERT
:
2641 case TARGET_PROT_DOUT_STRIP
:
2642 sig_attrs
->mem
.sig
.dif
.type
= IB_T10DIF_NONE
;
2643 sig_attrs
->wire
.sig
.dif
.type
= ib_prot_type
;
2644 sig_attrs
->wire
.sig
.dif
.bg_type
= IB_T10DIF_CRC
;
2645 sig_attrs
->wire
.sig
.dif
.ref_tag
= se_cmd
->reftag_seed
;
2647 case TARGET_PROT_DOUT_INSERT
:
2648 case TARGET_PROT_DIN_STRIP
:
2649 sig_attrs
->mem
.sig
.dif
.type
= ib_prot_type
;
2650 sig_attrs
->mem
.sig
.dif
.bg_type
= IB_T10DIF_CRC
;
2651 sig_attrs
->mem
.sig
.dif
.ref_tag
= se_cmd
->reftag_seed
;
2652 sig_attrs
->wire
.sig
.dif
.type
= IB_T10DIF_NONE
;
2654 case TARGET_PROT_DIN_PASS
:
2655 case TARGET_PROT_DOUT_PASS
:
2656 sig_attrs
->mem
.sig
.dif
.type
= ib_prot_type
;
2657 sig_attrs
->mem
.sig
.dif
.bg_type
= IB_T10DIF_CRC
;
2658 sig_attrs
->mem
.sig
.dif
.ref_tag
= se_cmd
->reftag_seed
;
2659 sig_attrs
->wire
.sig
.dif
.type
= ib_prot_type
;
2660 sig_attrs
->wire
.sig
.dif
.bg_type
= IB_T10DIF_CRC
;
2661 sig_attrs
->wire
.sig
.dif
.ref_tag
= se_cmd
->reftag_seed
;
2664 pr_err("Unsupported PI operation %d\n", se_cmd
->prot_op
);
2672 isert_set_prot_checks(u8 prot_checks
)
2674 return (prot_checks
& TARGET_DIF_CHECK_GUARD
? 0xc0 : 0) |
2675 (prot_checks
& TARGET_DIF_CHECK_REFTAG
? 0x30 : 0) |
2676 (prot_checks
& TARGET_DIF_CHECK_REFTAG
? 0x0f : 0);
2680 isert_reg_sig_mr(struct isert_conn
*isert_conn
, struct se_cmd
*se_cmd
,
2681 struct fast_reg_descriptor
*fr_desc
,
2682 struct ib_sge
*data_sge
, struct ib_sge
*prot_sge
,
2683 struct ib_sge
*sig_sge
)
2685 struct ib_send_wr sig_wr
, inv_wr
;
2686 struct ib_send_wr
*bad_wr
, *wr
= NULL
;
2687 struct pi_context
*pi_ctx
= fr_desc
->pi_ctx
;
2688 struct ib_sig_attrs sig_attrs
;
2692 memset(&sig_attrs
, 0, sizeof(sig_attrs
));
2693 ret
= isert_set_sig_attrs(se_cmd
, &sig_attrs
);
2697 sig_attrs
.check_mask
= isert_set_prot_checks(se_cmd
->prot_checks
);
2699 if (!(fr_desc
->ind
& ISERT_SIG_KEY_VALID
)) {
2700 memset(&inv_wr
, 0, sizeof(inv_wr
));
2701 inv_wr
.opcode
= IB_WR_LOCAL_INV
;
2702 inv_wr
.wr_id
= ISER_FASTREG_LI_WRID
;
2703 inv_wr
.ex
.invalidate_rkey
= pi_ctx
->sig_mr
->rkey
;
2706 key
= (u8
)(pi_ctx
->sig_mr
->rkey
& 0x000000FF);
2707 ib_update_fast_reg_key(pi_ctx
->sig_mr
, ++key
);
2710 memset(&sig_wr
, 0, sizeof(sig_wr
));
2711 sig_wr
.opcode
= IB_WR_REG_SIG_MR
;
2712 sig_wr
.wr_id
= ISER_FASTREG_LI_WRID
;
2713 sig_wr
.sg_list
= data_sge
;
2715 sig_wr
.wr
.sig_handover
.access_flags
= IB_ACCESS_LOCAL_WRITE
;
2716 sig_wr
.wr
.sig_handover
.sig_attrs
= &sig_attrs
;
2717 sig_wr
.wr
.sig_handover
.sig_mr
= pi_ctx
->sig_mr
;
2718 if (se_cmd
->t_prot_sg
)
2719 sig_wr
.wr
.sig_handover
.prot
= prot_sge
;
2726 ret
= ib_post_send(isert_conn
->conn_qp
, wr
, &bad_wr
);
2728 pr_err("fast registration failed, ret:%d\n", ret
);
2731 fr_desc
->ind
&= ~ISERT_SIG_KEY_VALID
;
2733 sig_sge
->lkey
= pi_ctx
->sig_mr
->lkey
;
2735 sig_sge
->length
= se_cmd
->data_length
;
2736 if (se_cmd
->prot_op
!= TARGET_PROT_DIN_STRIP
&&
2737 se_cmd
->prot_op
!= TARGET_PROT_DOUT_INSERT
)
2739 * We have protection guards on the wire
2740 * so we need to set a larget transfer
2742 sig_sge
->length
+= se_cmd
->prot_length
;
2744 pr_debug("sig_sge: addr: 0x%llx length: %u lkey: %x\n",
2745 sig_sge
->addr
, sig_sge
->length
,
2752 isert_reg_rdma(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
2753 struct isert_rdma_wr
*wr
)
2755 struct se_cmd
*se_cmd
= &cmd
->se_cmd
;
2756 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
2757 struct isert_conn
*isert_conn
= conn
->context
;
2758 struct ib_sge data_sge
;
2759 struct ib_send_wr
*send_wr
;
2760 struct fast_reg_descriptor
*fr_desc
= NULL
;
2763 unsigned long flags
;
2765 isert_cmd
->tx_desc
.isert_cmd
= isert_cmd
;
2767 offset
= wr
->iser_ib_op
== ISER_IB_RDMA_READ
? cmd
->write_data_done
: 0;
2768 ret
= isert_map_data_buf(isert_conn
, isert_cmd
, se_cmd
->t_data_sg
,
2769 se_cmd
->t_data_nents
, se_cmd
->data_length
,
2770 offset
, wr
->iser_ib_op
, &wr
->data
);
2774 if (wr
->data
.dma_nents
!= 1 ||
2775 se_cmd
->prot_op
!= TARGET_PROT_NORMAL
) {
2776 spin_lock_irqsave(&isert_conn
->conn_lock
, flags
);
2777 fr_desc
= list_first_entry(&isert_conn
->conn_fr_pool
,
2778 struct fast_reg_descriptor
, list
);
2779 list_del(&fr_desc
->list
);
2780 spin_unlock_irqrestore(&isert_conn
->conn_lock
, flags
);
2781 wr
->fr_desc
= fr_desc
;
2784 ret
= isert_fast_reg_mr(isert_conn
, fr_desc
, &wr
->data
,
2785 ISERT_DATA_KEY_VALID
, &data_sge
);
2789 if (se_cmd
->prot_op
!= TARGET_PROT_NORMAL
) {
2790 struct ib_sge prot_sge
, sig_sge
;
2792 if (se_cmd
->t_prot_sg
) {
2793 ret
= isert_map_data_buf(isert_conn
, isert_cmd
,
2795 se_cmd
->t_prot_nents
,
2796 se_cmd
->prot_length
,
2797 0, wr
->iser_ib_op
, &wr
->prot
);
2801 ret
= isert_fast_reg_mr(isert_conn
, fr_desc
, &wr
->prot
,
2802 ISERT_PROT_KEY_VALID
, &prot_sge
);
2804 goto unmap_prot_cmd
;
2807 ret
= isert_reg_sig_mr(isert_conn
, se_cmd
, fr_desc
,
2808 &data_sge
, &prot_sge
, &sig_sge
);
2810 goto unmap_prot_cmd
;
2812 fr_desc
->ind
|= ISERT_PROTECTED
;
2813 memcpy(&wr
->s_ib_sge
, &sig_sge
, sizeof(sig_sge
));
2815 memcpy(&wr
->s_ib_sge
, &data_sge
, sizeof(data_sge
));
2817 wr
->ib_sge
= &wr
->s_ib_sge
;
2818 wr
->send_wr_num
= 1;
2819 memset(&wr
->s_send_wr
, 0, sizeof(*send_wr
));
2820 wr
->send_wr
= &wr
->s_send_wr
;
2821 wr
->isert_cmd
= isert_cmd
;
2823 send_wr
= &isert_cmd
->rdma_wr
.s_send_wr
;
2824 send_wr
->sg_list
= &wr
->s_ib_sge
;
2825 send_wr
->num_sge
= 1;
2826 send_wr
->wr_id
= (unsigned long)&isert_cmd
->tx_desc
;
2827 if (wr
->iser_ib_op
== ISER_IB_RDMA_WRITE
) {
2828 send_wr
->opcode
= IB_WR_RDMA_WRITE
;
2829 send_wr
->wr
.rdma
.remote_addr
= isert_cmd
->read_va
;
2830 send_wr
->wr
.rdma
.rkey
= isert_cmd
->read_stag
;
2831 send_wr
->send_flags
= se_cmd
->prot_op
== TARGET_PROT_NORMAL
?
2832 0 : IB_SEND_SIGNALED
;
2834 send_wr
->opcode
= IB_WR_RDMA_READ
;
2835 send_wr
->wr
.rdma
.remote_addr
= isert_cmd
->write_va
;
2836 send_wr
->wr
.rdma
.rkey
= isert_cmd
->write_stag
;
2837 send_wr
->send_flags
= IB_SEND_SIGNALED
;
2842 if (se_cmd
->t_prot_sg
)
2843 isert_unmap_data_buf(isert_conn
, &wr
->prot
);
2846 spin_lock_irqsave(&isert_conn
->conn_lock
, flags
);
2847 list_add_tail(&fr_desc
->list
, &isert_conn
->conn_fr_pool
);
2848 spin_unlock_irqrestore(&isert_conn
->conn_lock
, flags
);
2850 isert_unmap_data_buf(isert_conn
, &wr
->data
);
2856 isert_put_datain(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
)
2858 struct se_cmd
*se_cmd
= &cmd
->se_cmd
;
2859 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
2860 struct isert_rdma_wr
*wr
= &isert_cmd
->rdma_wr
;
2861 struct isert_conn
*isert_conn
= (struct isert_conn
*)conn
->context
;
2862 struct isert_device
*device
= isert_conn
->conn_device
;
2863 struct ib_send_wr
*wr_failed
;
2866 pr_debug("Cmd: %p RDMA_WRITE data_length: %u\n",
2867 isert_cmd
, se_cmd
->data_length
);
2868 wr
->iser_ib_op
= ISER_IB_RDMA_WRITE
;
2869 rc
= device
->reg_rdma_mem(conn
, cmd
, wr
);
2871 pr_err("Cmd: %p failed to prepare RDMA res\n", isert_cmd
);
2875 if (se_cmd
->prot_op
== TARGET_PROT_NORMAL
) {
2877 * Build isert_conn->tx_desc for iSCSI response PDU and attach
2879 isert_create_send_desc(isert_conn
, isert_cmd
,
2880 &isert_cmd
->tx_desc
);
2881 iscsit_build_rsp_pdu(cmd
, conn
, true, (struct iscsi_scsi_rsp
*)
2882 &isert_cmd
->tx_desc
.iscsi_header
);
2883 isert_init_tx_hdrs(isert_conn
, &isert_cmd
->tx_desc
);
2884 isert_init_send_wr(isert_conn
, isert_cmd
,
2885 &isert_cmd
->tx_desc
.send_wr
, true);
2886 isert_cmd
->rdma_wr
.s_send_wr
.next
= &isert_cmd
->tx_desc
.send_wr
;
2887 wr
->send_wr_num
+= 1;
2890 atomic_add(wr
->send_wr_num
, &isert_conn
->post_send_buf_count
);
2892 rc
= ib_post_send(isert_conn
->conn_qp
, wr
->send_wr
, &wr_failed
);
2894 pr_warn("ib_post_send() failed for IB_WR_RDMA_WRITE\n");
2895 atomic_sub(wr
->send_wr_num
, &isert_conn
->post_send_buf_count
);
2898 if (se_cmd
->prot_op
== TARGET_PROT_NORMAL
)
2899 pr_debug("Cmd: %p posted RDMA_WRITE + Response for iSER Data "
2900 "READ\n", isert_cmd
);
2902 pr_debug("Cmd: %p posted RDMA_WRITE for iSER Data READ\n",
2909 isert_get_dataout(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
, bool recovery
)
2911 struct se_cmd
*se_cmd
= &cmd
->se_cmd
;
2912 struct isert_cmd
*isert_cmd
= iscsit_priv_cmd(cmd
);
2913 struct isert_rdma_wr
*wr
= &isert_cmd
->rdma_wr
;
2914 struct isert_conn
*isert_conn
= (struct isert_conn
*)conn
->context
;
2915 struct isert_device
*device
= isert_conn
->conn_device
;
2916 struct ib_send_wr
*wr_failed
;
2919 pr_debug("Cmd: %p RDMA_READ data_length: %u write_data_done: %u\n",
2920 isert_cmd
, se_cmd
->data_length
, cmd
->write_data_done
);
2921 wr
->iser_ib_op
= ISER_IB_RDMA_READ
;
2922 rc
= device
->reg_rdma_mem(conn
, cmd
, wr
);
2924 pr_err("Cmd: %p failed to prepare RDMA res\n", isert_cmd
);
2928 atomic_add(wr
->send_wr_num
, &isert_conn
->post_send_buf_count
);
2930 rc
= ib_post_send(isert_conn
->conn_qp
, wr
->send_wr
, &wr_failed
);
2932 pr_warn("ib_post_send() failed for IB_WR_RDMA_READ\n");
2933 atomic_sub(wr
->send_wr_num
, &isert_conn
->post_send_buf_count
);
2935 pr_debug("Cmd: %p posted RDMA_READ memory for ISER Data WRITE\n",
2942 isert_immediate_queue(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
, int state
)
2947 case ISTATE_SEND_NOPIN_WANT_RESPONSE
:
2948 ret
= isert_put_nopin(cmd
, conn
, false);
2951 pr_err("Unknown immediate state: 0x%02x\n", state
);
2960 isert_response_queue(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
, int state
)
2965 case ISTATE_SEND_LOGOUTRSP
:
2966 ret
= isert_put_logout_rsp(cmd
, conn
);
2968 pr_debug("Returning iSER Logout -EAGAIN\n");
2972 case ISTATE_SEND_NOPIN
:
2973 ret
= isert_put_nopin(cmd
, conn
, true);
2975 case ISTATE_SEND_TASKMGTRSP
:
2976 ret
= isert_put_tm_rsp(cmd
, conn
);
2978 case ISTATE_SEND_REJECT
:
2979 ret
= isert_put_reject(cmd
, conn
);
2981 case ISTATE_SEND_TEXTRSP
:
2982 ret
= isert_put_text_rsp(cmd
, conn
);
2984 case ISTATE_SEND_STATUS
:
2986 * Special case for sending non GOOD SCSI status from TX thread
2987 * context during pre se_cmd excecution failure.
2989 ret
= isert_put_response(conn
, cmd
);
2992 pr_err("Unknown response state: 0x%02x\n", state
);
3001 isert_setup_np(struct iscsi_np
*np
,
3002 struct __kernel_sockaddr_storage
*ksockaddr
)
3004 struct isert_np
*isert_np
;
3005 struct rdma_cm_id
*isert_lid
;
3006 struct sockaddr
*sa
;
3009 isert_np
= kzalloc(sizeof(struct isert_np
), GFP_KERNEL
);
3011 pr_err("Unable to allocate struct isert_np\n");
3014 sema_init(&isert_np
->np_sem
, 0);
3015 mutex_init(&isert_np
->np_accept_mutex
);
3016 INIT_LIST_HEAD(&isert_np
->np_accept_list
);
3017 init_completion(&isert_np
->np_login_comp
);
3019 sa
= (struct sockaddr
*)ksockaddr
;
3020 pr_debug("ksockaddr: %p, sa: %p\n", ksockaddr
, sa
);
3022 * Setup the np->np_sockaddr from the passed sockaddr setup
3023 * in iscsi_target_configfs.c code..
3025 memcpy(&np
->np_sockaddr
, ksockaddr
,
3026 sizeof(struct __kernel_sockaddr_storage
));
3028 isert_lid
= rdma_create_id(isert_cma_handler
, np
, RDMA_PS_TCP
,
3030 if (IS_ERR(isert_lid
)) {
3031 pr_err("rdma_create_id() for isert_listen_handler failed: %ld\n",
3032 PTR_ERR(isert_lid
));
3033 ret
= PTR_ERR(isert_lid
);
3037 ret
= rdma_bind_addr(isert_lid
, sa
);
3039 pr_err("rdma_bind_addr() for isert_lid failed: %d\n", ret
);
3043 ret
= rdma_listen(isert_lid
, ISERT_RDMA_LISTEN_BACKLOG
);
3045 pr_err("rdma_listen() for isert_lid failed: %d\n", ret
);
3049 isert_np
->np_cm_id
= isert_lid
;
3050 np
->np_context
= isert_np
;
3051 pr_debug("Setup isert_lid->context: %p\n", isert_lid
->context
);
3056 rdma_destroy_id(isert_lid
);
3063 isert_rdma_accept(struct isert_conn
*isert_conn
)
3065 struct rdma_cm_id
*cm_id
= isert_conn
->conn_cm_id
;
3066 struct rdma_conn_param cp
;
3069 memset(&cp
, 0, sizeof(struct rdma_conn_param
));
3070 cp
.responder_resources
= isert_conn
->responder_resources
;
3071 cp
.initiator_depth
= isert_conn
->initiator_depth
;
3073 cp
.rnr_retry_count
= 7;
3075 pr_debug("Before rdma_accept >>>>>>>>>>>>>>>>>>>>.\n");
3077 ret
= rdma_accept(cm_id
, &cp
);
3079 pr_err("rdma_accept() failed with: %d\n", ret
);
3083 pr_debug("After rdma_accept >>>>>>>>>>>>>>>>>>>>>.\n");
3089 isert_get_login_rx(struct iscsi_conn
*conn
, struct iscsi_login
*login
)
3091 struct isert_conn
*isert_conn
= (struct isert_conn
*)conn
->context
;
3094 pr_debug("isert_get_login_rx before conn_login_comp conn: %p\n", conn
);
3096 * For login requests after the first PDU, isert_rx_login_req() will
3097 * kick schedule_delayed_work(&conn->login_work) as the packet is
3098 * received, which turns this callback from iscsi_target_do_login_rx()
3101 if (!login
->first_request
)
3104 ret
= wait_for_completion_interruptible(&isert_conn
->conn_login_comp
);
3108 pr_debug("isert_get_login_rx processing login->req: %p\n", login
->req
);
3113 isert_set_conn_info(struct iscsi_np
*np
, struct iscsi_conn
*conn
,
3114 struct isert_conn
*isert_conn
)
3116 struct rdma_cm_id
*cm_id
= isert_conn
->conn_cm_id
;
3117 struct rdma_route
*cm_route
= &cm_id
->route
;
3118 struct sockaddr_in
*sock_in
;
3119 struct sockaddr_in6
*sock_in6
;
3121 conn
->login_family
= np
->np_sockaddr
.ss_family
;
3123 if (np
->np_sockaddr
.ss_family
== AF_INET6
) {
3124 sock_in6
= (struct sockaddr_in6
*)&cm_route
->addr
.dst_addr
;
3125 snprintf(conn
->login_ip
, sizeof(conn
->login_ip
), "%pI6c",
3126 &sock_in6
->sin6_addr
.in6_u
);
3127 conn
->login_port
= ntohs(sock_in6
->sin6_port
);
3129 sock_in6
= (struct sockaddr_in6
*)&cm_route
->addr
.src_addr
;
3130 snprintf(conn
->local_ip
, sizeof(conn
->local_ip
), "%pI6c",
3131 &sock_in6
->sin6_addr
.in6_u
);
3132 conn
->local_port
= ntohs(sock_in6
->sin6_port
);
3134 sock_in
= (struct sockaddr_in
*)&cm_route
->addr
.dst_addr
;
3135 sprintf(conn
->login_ip
, "%pI4",
3136 &sock_in
->sin_addr
.s_addr
);
3137 conn
->login_port
= ntohs(sock_in
->sin_port
);
3139 sock_in
= (struct sockaddr_in
*)&cm_route
->addr
.src_addr
;
3140 sprintf(conn
->local_ip
, "%pI4",
3141 &sock_in
->sin_addr
.s_addr
);
3142 conn
->local_port
= ntohs(sock_in
->sin_port
);
3147 isert_accept_np(struct iscsi_np
*np
, struct iscsi_conn
*conn
)
3149 struct isert_np
*isert_np
= (struct isert_np
*)np
->np_context
;
3150 struct isert_conn
*isert_conn
;
3151 int max_accept
= 0, ret
;
3154 ret
= down_interruptible(&isert_np
->np_sem
);
3158 spin_lock_bh(&np
->np_thread_lock
);
3159 if (np
->np_thread_state
>= ISCSI_NP_THREAD_RESET
) {
3160 spin_unlock_bh(&np
->np_thread_lock
);
3161 pr_debug("np_thread_state %d for isert_accept_np\n",
3162 np
->np_thread_state
);
3164 * No point in stalling here when np_thread
3165 * is in state RESET/SHUTDOWN/EXIT - bail
3169 spin_unlock_bh(&np
->np_thread_lock
);
3171 mutex_lock(&isert_np
->np_accept_mutex
);
3172 if (list_empty(&isert_np
->np_accept_list
)) {
3173 mutex_unlock(&isert_np
->np_accept_mutex
);
3177 isert_conn
= list_first_entry(&isert_np
->np_accept_list
,
3178 struct isert_conn
, conn_accept_node
);
3179 list_del_init(&isert_conn
->conn_accept_node
);
3180 mutex_unlock(&isert_np
->np_accept_mutex
);
3182 conn
->context
= isert_conn
;
3183 isert_conn
->conn
= conn
;
3186 ret
= isert_rdma_post_recvl(isert_conn
);
3190 ret
= isert_rdma_accept(isert_conn
);
3194 isert_set_conn_info(np
, conn
, isert_conn
);
3196 pr_debug("Processing isert_accept_np: isert_conn: %p\n", isert_conn
);
3201 isert_free_np(struct iscsi_np
*np
)
3203 struct isert_np
*isert_np
= (struct isert_np
*)np
->np_context
;
3205 rdma_destroy_id(isert_np
->np_cm_id
);
3207 np
->np_context
= NULL
;
3211 static void isert_wait_conn(struct iscsi_conn
*conn
)
3213 struct isert_conn
*isert_conn
= conn
->context
;
3215 pr_debug("isert_wait_conn: Starting \n");
3217 mutex_lock(&isert_conn
->conn_mutex
);
3218 if (isert_conn
->conn_cm_id
) {
3219 pr_debug("Calling rdma_disconnect from isert_wait_conn\n");
3220 rdma_disconnect(isert_conn
->conn_cm_id
);
3223 * Only wait for conn_wait_comp_err if the isert_conn made it
3224 * into full feature phase..
3226 if (isert_conn
->state
== ISER_CONN_INIT
) {
3227 mutex_unlock(&isert_conn
->conn_mutex
);
3230 if (isert_conn
->state
== ISER_CONN_UP
)
3231 isert_conn
->state
= ISER_CONN_TERMINATING
;
3232 mutex_unlock(&isert_conn
->conn_mutex
);
3234 wait_for_completion(&isert_conn
->conn_wait_comp_err
);
3236 wait_for_completion(&isert_conn
->conn_wait
);
3239 static void isert_free_conn(struct iscsi_conn
*conn
)
3241 struct isert_conn
*isert_conn
= conn
->context
;
3243 isert_put_conn(isert_conn
);
3246 static struct iscsit_transport iser_target_transport
= {
3248 .transport_type
= ISCSI_INFINIBAND
,
3249 .priv_size
= sizeof(struct isert_cmd
),
3250 .owner
= THIS_MODULE
,
3251 .iscsit_setup_np
= isert_setup_np
,
3252 .iscsit_accept_np
= isert_accept_np
,
3253 .iscsit_free_np
= isert_free_np
,
3254 .iscsit_wait_conn
= isert_wait_conn
,
3255 .iscsit_free_conn
= isert_free_conn
,
3256 .iscsit_get_login_rx
= isert_get_login_rx
,
3257 .iscsit_put_login_tx
= isert_put_login_tx
,
3258 .iscsit_immediate_queue
= isert_immediate_queue
,
3259 .iscsit_response_queue
= isert_response_queue
,
3260 .iscsit_get_dataout
= isert_get_dataout
,
3261 .iscsit_queue_data_in
= isert_put_datain
,
3262 .iscsit_queue_status
= isert_put_response
,
3263 .iscsit_aborted_task
= isert_aborted_task
,
3264 .iscsit_get_sup_prot_ops
= isert_get_sup_prot_ops
,
3267 static int __init
isert_init(void)
3271 isert_rx_wq
= alloc_workqueue("isert_rx_wq", 0, 0);
3273 pr_err("Unable to allocate isert_rx_wq\n");
3277 isert_comp_wq
= alloc_workqueue("isert_comp_wq", 0, 0);
3278 if (!isert_comp_wq
) {
3279 pr_err("Unable to allocate isert_comp_wq\n");
3284 iscsit_register_transport(&iser_target_transport
);
3285 pr_debug("iSER_TARGET[0] - Loaded iser_target_transport\n");
3289 destroy_workqueue(isert_rx_wq
);
3293 static void __exit
isert_exit(void)
3295 flush_scheduled_work();
3296 destroy_workqueue(isert_comp_wq
);
3297 destroy_workqueue(isert_rx_wq
);
3298 iscsit_unregister_transport(&iser_target_transport
);
3299 pr_debug("iSER_TARGET[0] - Released iser_target_transport\n");
3302 MODULE_DESCRIPTION("iSER-Target for mainline target infrastructure");
3303 MODULE_VERSION("0.1");
3304 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3305 MODULE_LICENSE("GPL");
3307 module_init(isert_init
);
3308 module_exit(isert_exit
);