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target: Add TFO->abort_task for aborted task resources release
[deliverable/linux.git] / drivers / infiniband / ulp / isert / ib_isert.c
CommitLineData
b8d26b3b
NB		 1/*******************************************************************************
2 * This file contains iSCSI extentions for RDMA (iSER) Verbs
3 *
4c76251e 4 * (c) Copyright 2013 Datera, Inc.
b8d26b3b
NB		 5 *
6 * Nicholas A. Bellinger <nab@linux-iscsi.org>
7 *
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.
12 *
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 ****************************************************************************/
18
19#include <linux/string.h>
20#include <linux/module.h>
21#include <linux/scatterlist.h>
22#include <linux/socket.h>
23#include <linux/in.h>
24#include <linux/in6.h>
95b60f07 25#include <linux/llist.h>
b8d26b3b
NB		 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
32#include "isert_proto.h"
33#include "ib_isert.h"
34
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
39static DEFINE_MUTEX(device_list_mutex);
40static LIST_HEAD(device_list);
41static struct workqueue_struct *isert_rx_wq;
42static struct workqueue_struct *isert_comp_wq;
b8d26b3b 43
d40945d8
VP		 44static void
45isert_unmap_cmd(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn);
46static int
47isert_map_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
48 struct isert_rdma_wr *wr);
59464ef4 49static void
a3a5a826 50isert_unreg_rdma(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn);
59464ef4 51static int
a3a5a826
SG		 52isert_reg_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
53 struct isert_rdma_wr *wr);
f93f3a70
SG		 54static int
55isert_put_response(struct iscsi_conn *conn, struct iscsi_cmd *cmd);
d40945d8 56
b8d26b3b
NB		 57static void
58isert_qp_event_callback(struct ib_event *e, void *context)
59{
60 struct isert_conn *isert_conn = (struct isert_conn *)context;
61
62 pr_err("isert_qp_event_callback event: %d\n", e->event);
63 switch (e->event) {
64 case IB_EVENT_COMM_EST:
65 rdma_notify(isert_conn->conn_cm_id, IB_EVENT_COMM_EST);
66 break;
67 case IB_EVENT_QP_LAST_WQE_REACHED:
68 pr_warn("Reached TX IB_EVENT_QP_LAST_WQE_REACHED:\n");
69 break;
70 default:
71 break;
72 }
73}
74
75static int
76isert_query_device(struct ib_device *ib_dev, struct ib_device_attr *devattr)
77{
78 int ret;
79
80 ret = ib_query_device(ib_dev, devattr);
81 if (ret) {
82 pr_err("ib_query_device() failed: %d\n", ret);
83 return ret;
84 }
85 pr_debug("devattr->max_sge: %d\n", devattr->max_sge);
86 pr_debug("devattr->max_sge_rd: %d\n", devattr->max_sge_rd);
87
88 return 0;
89}
90
91static int
d3e125da
SG		 92isert_conn_setup_qp(struct isert_conn *isert_conn, struct rdma_cm_id *cma_id,
93 u8 protection)
b8d26b3b
NB		 94{
95 struct isert_device *device = isert_conn->conn_device;
96 struct ib_qp_init_attr attr;
b8d26b3b
NB		 97 int ret, index, min_index = 0;
98
b8d26b3b
NB		 99 mutex_lock(&device_list_mutex);
100 for (index = 0; index < device->cqs_used; index++)
101 if (device->cq_active_qps[index] <
102 device->cq_active_qps[min_index])
103 min_index = index;
104 device->cq_active_qps[min_index]++;
105 pr_debug("isert_conn_setup_qp: Using min_index: %d\n", min_index);
106 mutex_unlock(&device_list_mutex);
107
108 memset(&attr, 0, sizeof(struct ib_qp_init_attr));
109 attr.event_handler = isert_qp_event_callback;
110 attr.qp_context = isert_conn;
111 attr.send_cq = device->dev_tx_cq[min_index];
112 attr.recv_cq = device->dev_rx_cq[min_index];
113 attr.cap.max_send_wr = ISERT_QP_MAX_REQ_DTOS;
114 attr.cap.max_recv_wr = ISERT_QP_MAX_RECV_DTOS;
115 /*
116 * FIXME: Use devattr.max_sge - 2 for max_send_sge as
117 * work-around for RDMA_READ..
118 */
59464ef4 119 attr.cap.max_send_sge = device->dev_attr.max_sge - 2;
b8d26b3b
NB		 120 isert_conn->max_sge = attr.cap.max_send_sge;
121
122 attr.cap.max_recv_sge = 1;
123 attr.sq_sig_type = IB_SIGNAL_REQ_WR;
124 attr.qp_type = IB_QPT_RC;
d3e125da
SG		 125 if (protection)
126 attr.create_flags |= IB_QP_CREATE_SIGNATURE_EN;
b8d26b3b
NB		 127
128 pr_debug("isert_conn_setup_qp cma_id->device: %p\n",
129 cma_id->device);
130 pr_debug("isert_conn_setup_qp conn_pd->device: %p\n",
131 isert_conn->conn_pd->device);
132
133 ret = rdma_create_qp(cma_id, isert_conn->conn_pd, &attr);
134 if (ret) {
135 pr_err("rdma_create_qp failed for cma_id %d\n", ret);
136 return ret;
137 }
138 isert_conn->conn_qp = cma_id->qp;
139 pr_debug("rdma_create_qp() returned success >>>>>>>>>>>>>>>>>>>>>>>>>.\n");
140
141 return 0;
142}
143
144static void
145isert_cq_event_callback(struct ib_event *e, void *context)
146{
147 pr_debug("isert_cq_event_callback event: %d\n", e->event);
148}
149
150static int
151isert_alloc_rx_descriptors(struct isert_conn *isert_conn)
152{
153 struct ib_device *ib_dev = isert_conn->conn_cm_id->device;
154 struct iser_rx_desc *rx_desc;
155 struct ib_sge *rx_sg;
156 u64 dma_addr;
157 int i, j;
158
159 isert_conn->conn_rx_descs = kzalloc(ISERT_QP_MAX_RECV_DTOS *
160 sizeof(struct iser_rx_desc), GFP_KERNEL);
161 if (!isert_conn->conn_rx_descs)
162 goto fail;
163
164 rx_desc = isert_conn->conn_rx_descs;
165
166 for (i = 0; i < ISERT_QP_MAX_RECV_DTOS; i++, rx_desc++) {
167 dma_addr = ib_dma_map_single(ib_dev, (void *)rx_desc,
168 ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE);
169 if (ib_dma_mapping_error(ib_dev, dma_addr))
170 goto dma_map_fail;
171
172 rx_desc->dma_addr = dma_addr;
173
174 rx_sg = &rx_desc->rx_sg;
175 rx_sg->addr = rx_desc->dma_addr;
176 rx_sg->length = ISER_RX_PAYLOAD_SIZE;
177 rx_sg->lkey = isert_conn->conn_mr->lkey;
178 }
179
180 isert_conn->conn_rx_desc_head = 0;
181 return 0;
182
183dma_map_fail:
184 rx_desc = isert_conn->conn_rx_descs;
185 for (j = 0; j < i; j++, rx_desc++) {
186 ib_dma_unmap_single(ib_dev, rx_desc->dma_addr,
187 ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE);
188 }
189 kfree(isert_conn->conn_rx_descs);
190 isert_conn->conn_rx_descs = NULL;
191fail:
192 return -ENOMEM;
193}
194
195static void
196isert_free_rx_descriptors(struct isert_conn *isert_conn)
197{
198 struct ib_device *ib_dev = isert_conn->conn_cm_id->device;
199 struct iser_rx_desc *rx_desc;
200 int i;
201
202 if (!isert_conn->conn_rx_descs)
203 return;
204
205 rx_desc = isert_conn->conn_rx_descs;
206 for (i = 0; i < ISERT_QP_MAX_RECV_DTOS; i++, rx_desc++) {
207 ib_dma_unmap_single(ib_dev, rx_desc->dma_addr,
208 ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE);
209 }
210
211 kfree(isert_conn->conn_rx_descs);
212 isert_conn->conn_rx_descs = NULL;
213}
214
2853c2b6 215static void isert_cq_tx_work(struct work_struct *);
b8d26b3b 216static void isert_cq_tx_callback(struct ib_cq *, void *);
2853c2b6 217static void isert_cq_rx_work(struct work_struct *);
b8d26b3b
NB		 218static void isert_cq_rx_callback(struct ib_cq *, void *);
219
220static int
221isert_create_device_ib_res(struct isert_device *device)
222{
223 struct ib_device *ib_dev = device->ib_device;
224 struct isert_cq_desc *cq_desc;
59464ef4 225 struct ib_device_attr *dev_attr;
b8d26b3b
NB		 226 int ret = 0, i, j;
227
59464ef4
VP		 228 dev_attr = &device->dev_attr;
229 ret = isert_query_device(ib_dev, dev_attr);
230 if (ret)
231 return ret;
232
d40945d8 233 /* asign function handlers */
59464ef4 234 if (dev_attr->device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS) {
a3a5a826
SG		 235 device->use_fastreg = 1;
236 device->reg_rdma_mem = isert_reg_rdma;
237 device->unreg_rdma_mem = isert_unreg_rdma;
59464ef4 238 } else {
a3a5a826 239 device->use_fastreg = 0;
59464ef4
VP		 240 device->reg_rdma_mem = isert_map_rdma;
241 device->unreg_rdma_mem = isert_unmap_cmd;
242 }
d40945d8 243
d3e125da
SG		 244 /* Check signature cap */
245 device->pi_capable = dev_attr->device_cap_flags &
246 IB_DEVICE_SIGNATURE_HANDOVER ? true : false;
247
b8d26b3b
NB		 248 device->cqs_used = min_t(int, num_online_cpus(),
249 device->ib_device->num_comp_vectors);
250 device->cqs_used = min(ISERT_MAX_CQ, device->cqs_used);
a3a5a826 251 pr_debug("Using %d CQs, device %s supports %d vectors support "
d3e125da 252 "Fast registration %d pi_capable %d\n",
b8d26b3b 253 device->cqs_used, device->ib_device->name,
d3e125da
SG		 254 device->ib_device->num_comp_vectors, device->use_fastreg,
255 device->pi_capable);
b8d26b3b
NB		 256 device->cq_desc = kzalloc(sizeof(struct isert_cq_desc) *
257 device->cqs_used, GFP_KERNEL);
258 if (!device->cq_desc) {
259 pr_err("Unable to allocate device->cq_desc\n");
260 return -ENOMEM;
261 }
262 cq_desc = device->cq_desc;
263
b8d26b3b
NB		 264 for (i = 0; i < device->cqs_used; i++) {
265 cq_desc[i].device = device;
266 cq_desc[i].cq_index = i;
267
2853c2b6 268 INIT_WORK(&cq_desc[i].cq_rx_work, isert_cq_rx_work);
b8d26b3b
NB		 269 device->dev_rx_cq[i] = ib_create_cq(device->ib_device,
270 isert_cq_rx_callback,
271 isert_cq_event_callback,
272 (void *)&cq_desc[i],
273 ISER_MAX_RX_CQ_LEN, i);
94a71110
WY		 274 if (IS_ERR(device->dev_rx_cq[i])) {
275 ret = PTR_ERR(device->dev_rx_cq[i]);
276 device->dev_rx_cq[i] = NULL;
b8d26b3b 277 goto out_cq;
94a71110 278 }
b8d26b3b 279
2853c2b6 280 INIT_WORK(&cq_desc[i].cq_tx_work, isert_cq_tx_work);
b8d26b3b
NB		 281 device->dev_tx_cq[i] = ib_create_cq(device->ib_device,
282 isert_cq_tx_callback,
283 isert_cq_event_callback,
284 (void *)&cq_desc[i],
285 ISER_MAX_TX_CQ_LEN, i);
94a71110
WY		 286 if (IS_ERR(device->dev_tx_cq[i])) {
287 ret = PTR_ERR(device->dev_tx_cq[i]);
288 device->dev_tx_cq[i] = NULL;
b8d26b3b 289 goto out_cq;
94a71110 290 }
b8d26b3b 291
94a71110
WY		 292 ret = ib_req_notify_cq(device->dev_rx_cq[i], IB_CQ_NEXT_COMP);
293 if (ret)
b8d26b3b
NB		 294 goto out_cq;
295
94a71110
WY		 296 ret = ib_req_notify_cq(device->dev_tx_cq[i], IB_CQ_NEXT_COMP);
297 if (ret)
b8d26b3b
NB		 298 goto out_cq;
299 }
300
b8d26b3b
NB		 301 return 0;
302
303out_cq:
304 for (j = 0; j < i; j++) {
305 cq_desc = &device->cq_desc[j];
306
307 if (device->dev_rx_cq[j]) {
308 cancel_work_sync(&cq_desc->cq_rx_work);
309 ib_destroy_cq(device->dev_rx_cq[j]);
310 }
311 if (device->dev_tx_cq[j]) {
312 cancel_work_sync(&cq_desc->cq_tx_work);
313 ib_destroy_cq(device->dev_tx_cq[j]);
314 }
315 }
b8d26b3b
NB		 316 kfree(device->cq_desc);
317
318 return ret;
319}
320
321static void
322isert_free_device_ib_res(struct isert_device *device)
323{
324 struct isert_cq_desc *cq_desc;
325 int i;
326
327 for (i = 0; i < device->cqs_used; i++) {
328 cq_desc = &device->cq_desc[i];
329
330 cancel_work_sync(&cq_desc->cq_rx_work);
331 cancel_work_sync(&cq_desc->cq_tx_work);
332 ib_destroy_cq(device->dev_rx_cq[i]);
333 ib_destroy_cq(device->dev_tx_cq[i]);
334 device->dev_rx_cq[i] = NULL;
335 device->dev_tx_cq[i] = NULL;
336 }
337
b8d26b3b
NB		 338 kfree(device->cq_desc);
339}
340
341static void
342isert_device_try_release(struct isert_device *device)
343{
344 mutex_lock(&device_list_mutex);
345 device->refcount--;
346 if (!device->refcount) {
347 isert_free_device_ib_res(device);
348 list_del(&device->dev_node);
349 kfree(device);
350 }
351 mutex_unlock(&device_list_mutex);
352}
353
354static struct isert_device *
355isert_device_find_by_ib_dev(struct rdma_cm_id *cma_id)
356{
357 struct isert_device *device;
358 int ret;
359
360 mutex_lock(&device_list_mutex);
361 list_for_each_entry(device, &device_list, dev_node) {
362 if (device->ib_device->node_guid == cma_id->device->node_guid) {
363 device->refcount++;
364 mutex_unlock(&device_list_mutex);
365 return device;
366 }
367 }
368
369 device = kzalloc(sizeof(struct isert_device), GFP_KERNEL);
370 if (!device) {
371 mutex_unlock(&device_list_mutex);
372 return ERR_PTR(-ENOMEM);
373 }
374
375 INIT_LIST_HEAD(&device->dev_node);
376
377 device->ib_device = cma_id->device;
378 ret = isert_create_device_ib_res(device);
379 if (ret) {
380 kfree(device);
381 mutex_unlock(&device_list_mutex);
382 return ERR_PTR(ret);
383 }
384
385 device->refcount++;
386 list_add_tail(&device->dev_node, &device_list);
387 mutex_unlock(&device_list_mutex);
388
389 return device;
390}
391
59464ef4 392static void
a3a5a826 393isert_conn_free_fastreg_pool(struct isert_conn *isert_conn)
59464ef4
VP		 394{
395 struct fast_reg_descriptor *fr_desc, *tmp;
396 int i = 0;
397
a3a5a826 398 if (list_empty(&isert_conn->conn_fr_pool))
59464ef4
VP		 399 return;
400
a3a5a826 401 pr_debug("Freeing conn %p fastreg pool", isert_conn);
59464ef4
VP		 402
403 list_for_each_entry_safe(fr_desc, tmp,
a3a5a826 404 &isert_conn->conn_fr_pool, list) {
59464ef4
VP		 405 list_del(&fr_desc->list);
406 ib_free_fast_reg_page_list(fr_desc->data_frpl);
407 ib_dereg_mr(fr_desc->data_mr);
d3e125da
SG		 408 if (fr_desc->pi_ctx) {
409 ib_free_fast_reg_page_list(fr_desc->pi_ctx->prot_frpl);
410 ib_dereg_mr(fr_desc->pi_ctx->prot_mr);
411 ib_destroy_mr(fr_desc->pi_ctx->sig_mr);
412 kfree(fr_desc->pi_ctx);
413 }
59464ef4
VP		 414 kfree(fr_desc);
415 ++i;
416 }
417
a3a5a826 418 if (i < isert_conn->conn_fr_pool_size)
59464ef4 419 pr_warn("Pool still has %d regions registered\n",
a3a5a826 420 isert_conn->conn_fr_pool_size - i);
59464ef4
VP		 421}
422
dc87a90f
SG		 423static int
424isert_create_fr_desc(struct ib_device *ib_device, struct ib_pd *pd,
d3e125da 425 struct fast_reg_descriptor *fr_desc, u8 protection)
dc87a90f 426{
d3e125da
SG		 427 int ret;
428
dc87a90f
SG		 429 fr_desc->data_frpl = ib_alloc_fast_reg_page_list(ib_device,
430 ISCSI_ISER_SG_TABLESIZE);
431 if (IS_ERR(fr_desc->data_frpl)) {
432 pr_err("Failed to allocate data frpl err=%ld\n",
433 PTR_ERR(fr_desc->data_frpl));
434 return PTR_ERR(fr_desc->data_frpl);
435 }
436
437 fr_desc->data_mr = ib_alloc_fast_reg_mr(pd, ISCSI_ISER_SG_TABLESIZE);
438 if (IS_ERR(fr_desc->data_mr)) {
439 pr_err("Failed to allocate data frmr err=%ld\n",
440 PTR_ERR(fr_desc->data_mr));
d3e125da
SG		 441 ret = PTR_ERR(fr_desc->data_mr);
442 goto err_data_frpl;
dc87a90f
SG		 443 }
444 pr_debug("Create fr_desc %p page_list %p\n",
445 fr_desc, fr_desc->data_frpl->page_list);
d3e125da
SG		 446 fr_desc->ind |= ISERT_DATA_KEY_VALID;
447
448 if (protection) {
449 struct ib_mr_init_attr mr_init_attr = {0};
450 struct pi_context *pi_ctx;
451
452 fr_desc->pi_ctx = kzalloc(sizeof(*fr_desc->pi_ctx), GFP_KERNEL);
453 if (!fr_desc->pi_ctx) {
454 pr_err("Failed to allocate pi context\n");
455 ret = -ENOMEM;
456 goto err_data_mr;
457 }
458 pi_ctx = fr_desc->pi_ctx;
459
460 pi_ctx->prot_frpl = ib_alloc_fast_reg_page_list(ib_device,
461 ISCSI_ISER_SG_TABLESIZE);
462 if (IS_ERR(pi_ctx->prot_frpl)) {
463 pr_err("Failed to allocate prot frpl err=%ld\n",
464 PTR_ERR(pi_ctx->prot_frpl));
465 ret = PTR_ERR(pi_ctx->prot_frpl);
466 goto err_pi_ctx;
467 }
dc87a90f 468
d3e125da
SG		 469 pi_ctx->prot_mr = ib_alloc_fast_reg_mr(pd, ISCSI_ISER_SG_TABLESIZE);
470 if (IS_ERR(pi_ctx->prot_mr)) {
471 pr_err("Failed to allocate prot frmr err=%ld\n",
472 PTR_ERR(pi_ctx->prot_mr));
473 ret = PTR_ERR(pi_ctx->prot_mr);
474 goto err_prot_frpl;
475 }
476 fr_desc->ind |= ISERT_PROT_KEY_VALID;
477
478 mr_init_attr.max_reg_descriptors = 2;
479 mr_init_attr.flags |= IB_MR_SIGNATURE_EN;
480 pi_ctx->sig_mr = ib_create_mr(pd, &mr_init_attr);
481 if (IS_ERR(pi_ctx->sig_mr)) {
482 pr_err("Failed to allocate signature enabled mr err=%ld\n",
483 PTR_ERR(pi_ctx->sig_mr));
484 ret = PTR_ERR(pi_ctx->sig_mr);
485 goto err_prot_mr;
486 }
487 fr_desc->ind |= ISERT_SIG_KEY_VALID;
488 }
489 fr_desc->ind &= ~ISERT_PROTECTED;
dc87a90f
SG		 490
491 return 0;
d3e125da
SG		 492err_prot_mr:
493 ib_dereg_mr(fr_desc->pi_ctx->prot_mr);
494err_prot_frpl:
495 ib_free_fast_reg_page_list(fr_desc->pi_ctx->prot_frpl);
496err_pi_ctx:
497 kfree(fr_desc->pi_ctx);
498err_data_mr:
499 ib_dereg_mr(fr_desc->data_mr);
500err_data_frpl:
501 ib_free_fast_reg_page_list(fr_desc->data_frpl);
502
503 return ret;
59464ef4
VP		 504}
505
506static int
d3e125da 507isert_conn_create_fastreg_pool(struct isert_conn *isert_conn, u8 pi_support)
59464ef4
VP		 508{
509 struct fast_reg_descriptor *fr_desc;
510 struct isert_device *device = isert_conn->conn_device;
f46d6a8a
NB		 511 struct se_session *se_sess = isert_conn->conn->sess->se_sess;
512 struct se_node_acl *se_nacl = se_sess->se_node_acl;
513 int i, ret, tag_num;
514 /*
515 * Setup the number of FRMRs based upon the number of tags
516 * available to session in iscsi_target_locate_portal().
517 */
518 tag_num = max_t(u32, ISCSIT_MIN_TAGS, se_nacl->queue_depth);
519 tag_num = (tag_num * 2) + ISCSIT_EXTRA_TAGS;
59464ef4 520
a3a5a826 521 isert_conn->conn_fr_pool_size = 0;
f46d6a8a 522 for (i = 0; i < tag_num; i++) {
59464ef4
VP		 523 fr_desc = kzalloc(sizeof(*fr_desc), GFP_KERNEL);
524 if (!fr_desc) {
525 pr_err("Failed to allocate fast_reg descriptor\n");
526 ret = -ENOMEM;
527 goto err;
528 }
529
dc87a90f 530 ret = isert_create_fr_desc(device->ib_device,
d3e125da
SG		 531 isert_conn->conn_pd, fr_desc,
532 pi_support);
dc87a90f
SG		 533 if (ret) {
534 pr_err("Failed to create fastreg descriptor err=%d\n",
535 ret);
a80e21b3 536 kfree(fr_desc);
59464ef4
VP		 537 goto err;
538 }
59464ef4 539
a3a5a826
SG		 540 list_add_tail(&fr_desc->list, &isert_conn->conn_fr_pool);
541 isert_conn->conn_fr_pool_size++;
59464ef4
VP		 542 }
543
a3a5a826
SG		 544 pr_debug("Creating conn %p fastreg pool size=%d",
545 isert_conn, isert_conn->conn_fr_pool_size);
59464ef4
VP		 546
547 return 0;
548
549err:
a3a5a826 550 isert_conn_free_fastreg_pool(isert_conn);
59464ef4
VP		 551 return ret;
552}
553
b8d26b3b
NB		 554static int
555isert_connect_request(struct rdma_cm_id *cma_id, struct rdma_cm_event *event)
556{
557 struct iscsi_np *np = cma_id->context;
558 struct isert_np *isert_np = np->np_context;
559 struct isert_conn *isert_conn;
560 struct isert_device *device;
561 struct ib_device *ib_dev = cma_id->device;
562 int ret = 0;
d3e125da 563 u8 pi_support = np->tpg_np->tpg->tpg_attrib.t10_pi;
b8d26b3b
NB		 564
565 pr_debug("Entering isert_connect_request cma_id: %p, context: %p\n",
566 cma_id, cma_id->context);
567
568 isert_conn = kzalloc(sizeof(struct isert_conn), GFP_KERNEL);
569 if (!isert_conn) {
570 pr_err("Unable to allocate isert_conn\n");
571 return -ENOMEM;
572 }
573 isert_conn->state = ISER_CONN_INIT;
574 INIT_LIST_HEAD(&isert_conn->conn_accept_node);
575 init_completion(&isert_conn->conn_login_comp);
defd8848
NB		 576 init_completion(&isert_conn->conn_wait);
577 init_completion(&isert_conn->conn_wait_comp_err);
b8d26b3b
NB		 578 kref_init(&isert_conn->conn_kref);
579 kref_get(&isert_conn->conn_kref);
b2cb9649 580 mutex_init(&isert_conn->conn_mutex);
59464ef4 581 spin_lock_init(&isert_conn->conn_lock);
f46d6a8a 582 INIT_LIST_HEAD(&isert_conn->conn_fr_pool);
b8d26b3b
NB		 583
584 cma_id->context = isert_conn;
585 isert_conn->conn_cm_id = cma_id;
586 isert_conn->responder_resources = event->param.conn.responder_resources;
587 isert_conn->initiator_depth = event->param.conn.initiator_depth;
588 pr_debug("Using responder_resources: %u initiator_depth: %u\n",
589 isert_conn->responder_resources, isert_conn->initiator_depth);
590
591 isert_conn->login_buf = kzalloc(ISCSI_DEF_MAX_RECV_SEG_LEN +
592 ISER_RX_LOGIN_SIZE, GFP_KERNEL);
593 if (!isert_conn->login_buf) {
594 pr_err("Unable to allocate isert_conn->login_buf\n");
595 ret = -ENOMEM;
596 goto out;
597 }
598
599 isert_conn->login_req_buf = isert_conn->login_buf;
600 isert_conn->login_rsp_buf = isert_conn->login_buf +
601 ISCSI_DEF_MAX_RECV_SEG_LEN;
602 pr_debug("Set login_buf: %p login_req_buf: %p login_rsp_buf: %p\n",
603 isert_conn->login_buf, isert_conn->login_req_buf,
604 isert_conn->login_rsp_buf);
605
606 isert_conn->login_req_dma = ib_dma_map_single(ib_dev,
607 (void *)isert_conn->login_req_buf,
608 ISCSI_DEF_MAX_RECV_SEG_LEN, DMA_FROM_DEVICE);
609
610 ret = ib_dma_mapping_error(ib_dev, isert_conn->login_req_dma);
611 if (ret) {
612 pr_err("ib_dma_mapping_error failed for login_req_dma: %d\n",
613 ret);
614 isert_conn->login_req_dma = 0;
615 goto out_login_buf;
616 }
617
618 isert_conn->login_rsp_dma = ib_dma_map_single(ib_dev,
619 (void *)isert_conn->login_rsp_buf,
620 ISER_RX_LOGIN_SIZE, DMA_TO_DEVICE);
621
622 ret = ib_dma_mapping_error(ib_dev, isert_conn->login_rsp_dma);
623 if (ret) {
624 pr_err("ib_dma_mapping_error failed for login_rsp_dma: %d\n",
625 ret);
626 isert_conn->login_rsp_dma = 0;
627 goto out_req_dma_map;
628 }
629
630 device = isert_device_find_by_ib_dev(cma_id);
631 if (IS_ERR(device)) {
632 ret = PTR_ERR(device);
633 goto out_rsp_dma_map;
634 }
635
636 isert_conn->conn_device = device;
eb6ab132
SG		 637 isert_conn->conn_pd = ib_alloc_pd(isert_conn->conn_device->ib_device);
638 if (IS_ERR(isert_conn->conn_pd)) {
639 ret = PTR_ERR(isert_conn->conn_pd);
640 pr_err("ib_alloc_pd failed for conn %p: ret=%d\n",
641 isert_conn, ret);
642 goto out_pd;
643 }
b8d26b3b 644
eb6ab132
SG		 645 isert_conn->conn_mr = ib_get_dma_mr(isert_conn->conn_pd,
646 IB_ACCESS_LOCAL_WRITE);
647 if (IS_ERR(isert_conn->conn_mr)) {
648 ret = PTR_ERR(isert_conn->conn_mr);
649 pr_err("ib_get_dma_mr failed for conn %p: ret=%d\n",
650 isert_conn, ret);
651 goto out_mr;
652 }
b8d26b3b 653
d3e125da
SG		 654 if (pi_support && !device->pi_capable) {
655 pr_err("Protection information requested but not supported\n");
656 ret = -EINVAL;
657 goto out_mr;
658 }
659
d3e125da 660 ret = isert_conn_setup_qp(isert_conn, cma_id, pi_support);
b8d26b3b
NB		 661 if (ret)
662 goto out_conn_dev;
663
664 mutex_lock(&isert_np->np_accept_mutex);
665 list_add_tail(&isert_np->np_accept_list, &isert_conn->conn_accept_node);
666 mutex_unlock(&isert_np->np_accept_mutex);
667
668 pr_debug("isert_connect_request() waking up np_accept_wq: %p\n", np);
669 wake_up(&isert_np->np_accept_wq);
670 return 0;
671
672out_conn_dev:
eb6ab132
SG		 673 ib_dereg_mr(isert_conn->conn_mr);
674out_mr:
675 ib_dealloc_pd(isert_conn->conn_pd);
676out_pd:
b8d26b3b
NB		 677 isert_device_try_release(device);
678out_rsp_dma_map:
679 ib_dma_unmap_single(ib_dev, isert_conn->login_rsp_dma,
680 ISER_RX_LOGIN_SIZE, DMA_TO_DEVICE);
681out_req_dma_map:
682 ib_dma_unmap_single(ib_dev, isert_conn->login_req_dma,
683 ISCSI_DEF_MAX_RECV_SEG_LEN, DMA_FROM_DEVICE);
684out_login_buf:
685 kfree(isert_conn->login_buf);
686out:
687 kfree(isert_conn);
688 return ret;
689}
690
691static void
692isert_connect_release(struct isert_conn *isert_conn)
693{
694 struct ib_device *ib_dev = isert_conn->conn_cm_id->device;
695 struct isert_device *device = isert_conn->conn_device;
696 int cq_index;
697
698 pr_debug("Entering isert_connect_release(): >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
699
a3a5a826
SG		 700 if (device && device->use_fastreg)
701 isert_conn_free_fastreg_pool(isert_conn);
59464ef4 702
b8d26b3b
NB		 703 if (isert_conn->conn_qp) {
704 cq_index = ((struct isert_cq_desc *)
705 isert_conn->conn_qp->recv_cq->cq_context)->cq_index;
706 pr_debug("isert_connect_release: cq_index: %d\n", cq_index);
707 isert_conn->conn_device->cq_active_qps[cq_index]--;
708
709 rdma_destroy_qp(isert_conn->conn_cm_id);
710 }
711
712 isert_free_rx_descriptors(isert_conn);
713 rdma_destroy_id(isert_conn->conn_cm_id);
714
eb6ab132
SG		 715 ib_dereg_mr(isert_conn->conn_mr);
716 ib_dealloc_pd(isert_conn->conn_pd);
717
b8d26b3b
NB		 718 if (isert_conn->login_buf) {
719 ib_dma_unmap_single(ib_dev, isert_conn->login_rsp_dma,
720 ISER_RX_LOGIN_SIZE, DMA_TO_DEVICE);
721 ib_dma_unmap_single(ib_dev, isert_conn->login_req_dma,
722 ISCSI_DEF_MAX_RECV_SEG_LEN,
723 DMA_FROM_DEVICE);
724 kfree(isert_conn->login_buf);
725 }
726 kfree(isert_conn);
727
728 if (device)
729 isert_device_try_release(device);
730
731 pr_debug("Leaving isert_connect_release >>>>>>>>>>>>\n");
732}
733
734static void
735isert_connected_handler(struct rdma_cm_id *cma_id)
736{
737 return;
738}
739
740static void
741isert_release_conn_kref(struct kref *kref)
742{
743 struct isert_conn *isert_conn = container_of(kref,
744 struct isert_conn, conn_kref);
745
746 pr_debug("Calling isert_connect_release for final kref %s/%d\n",
747 current->comm, current->pid);
748
749 isert_connect_release(isert_conn);
750}
751
752static void
753isert_put_conn(struct isert_conn *isert_conn)
754{
755 kref_put(&isert_conn->conn_kref, isert_release_conn_kref);
756}
757
758static void
759isert_disconnect_work(struct work_struct *work)
760{
761 struct isert_conn *isert_conn = container_of(work,
762 struct isert_conn, conn_logout_work);
763
764 pr_debug("isert_disconnect_work(): >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
b2cb9649 765 mutex_lock(&isert_conn->conn_mutex);
defd8848
NB		 766 if (isert_conn->state == ISER_CONN_UP)
767 isert_conn->state = ISER_CONN_TERMINATING;
b8d26b3b
NB		 768
769 if (isert_conn->post_recv_buf_count == 0 &&
770 atomic_read(&isert_conn->post_send_buf_count) == 0) {
b2cb9649
NB		 771 mutex_unlock(&isert_conn->conn_mutex);
772 goto wake_up;
773 }
774 if (!isert_conn->conn_cm_id) {
775 mutex_unlock(&isert_conn->conn_mutex);
776 isert_put_conn(isert_conn);
777 return;
b8d26b3b 778 }
b2cb9649
NB		 779 if (!isert_conn->logout_posted) {
780 pr_debug("Calling rdma_disconnect for !logout_posted from"
781 " isert_disconnect_work\n");
782 rdma_disconnect(isert_conn->conn_cm_id);
783 mutex_unlock(&isert_conn->conn_mutex);
784 iscsit_cause_connection_reinstatement(isert_conn->conn, 0);
785 goto wake_up;
b8d26b3b 786 }
b2cb9649 787 mutex_unlock(&isert_conn->conn_mutex);
b8d26b3b 788
b2cb9649 789wake_up:
defd8848 790 complete(&isert_conn->conn_wait);
b8d26b3b
NB		 791 isert_put_conn(isert_conn);
792}
793
794static void
795isert_disconnected_handler(struct rdma_cm_id *cma_id)
796{
797 struct isert_conn *isert_conn = (struct isert_conn *)cma_id->context;
798
799 INIT_WORK(&isert_conn->conn_logout_work, isert_disconnect_work);
800 schedule_work(&isert_conn->conn_logout_work);
801}
802
803static int
804isert_cma_handler(struct rdma_cm_id *cma_id, struct rdma_cm_event *event)
805{
806 int ret = 0;
807
808 pr_debug("isert_cma_handler: event %d status %d conn %p id %p\n",
809 event->event, event->status, cma_id->context, cma_id);
810
811 switch (event->event) {
812 case RDMA_CM_EVENT_CONNECT_REQUEST:
813 pr_debug("RDMA_CM_EVENT_CONNECT_REQUEST: >>>>>>>>>>>>>>>\n");
814 ret = isert_connect_request(cma_id, event);
815 break;
816 case RDMA_CM_EVENT_ESTABLISHED:
817 pr_debug("RDMA_CM_EVENT_ESTABLISHED >>>>>>>>>>>>>>\n");
818 isert_connected_handler(cma_id);
819 break;
820 case RDMA_CM_EVENT_DISCONNECTED:
821 pr_debug("RDMA_CM_EVENT_DISCONNECTED: >>>>>>>>>>>>>>\n");
822 isert_disconnected_handler(cma_id);
823 break;
824 case RDMA_CM_EVENT_DEVICE_REMOVAL:
825 case RDMA_CM_EVENT_ADDR_CHANGE:
826 break;
827 case RDMA_CM_EVENT_CONNECT_ERROR:
828 default:
829 pr_err("Unknown RDMA CMA event: %d\n", event->event);
830 break;
831 }
832
833 if (ret != 0) {
834 pr_err("isert_cma_handler failed RDMA_CM_EVENT: 0x%08x %d\n",
835 event->event, ret);
836 dump_stack();
837 }
838
839 return ret;
840}
841
842static int
843isert_post_recv(struct isert_conn *isert_conn, u32 count)
844{
845 struct ib_recv_wr *rx_wr, *rx_wr_failed;
846 int i, ret;
847 unsigned int rx_head = isert_conn->conn_rx_desc_head;
848 struct iser_rx_desc *rx_desc;
849
850 for (rx_wr = isert_conn->conn_rx_wr, i = 0; i < count; i++, rx_wr++) {
851 rx_desc = &isert_conn->conn_rx_descs[rx_head];
852 rx_wr->wr_id = (unsigned long)rx_desc;
853 rx_wr->sg_list = &rx_desc->rx_sg;
854 rx_wr->num_sge = 1;
855 rx_wr->next = rx_wr + 1;
856 rx_head = (rx_head + 1) & (ISERT_QP_MAX_RECV_DTOS - 1);
857 }
858
859 rx_wr--;
860 rx_wr->next = NULL; /* mark end of work requests list */
861
862 isert_conn->post_recv_buf_count += count;
863 ret = ib_post_recv(isert_conn->conn_qp, isert_conn->conn_rx_wr,
864 &rx_wr_failed);
865 if (ret) {
866 pr_err("ib_post_recv() failed with ret: %d\n", ret);
867 isert_conn->post_recv_buf_count -= count;
868 } else {
869 pr_debug("isert_post_recv(): Posted %d RX buffers\n", count);
870 isert_conn->conn_rx_desc_head = rx_head;
871 }
872 return ret;
873}
874
875static int
876isert_post_send(struct isert_conn *isert_conn, struct iser_tx_desc *tx_desc)
877{
878 struct ib_device *ib_dev = isert_conn->conn_cm_id->device;
879 struct ib_send_wr send_wr, *send_wr_failed;
880 int ret;
881
882 ib_dma_sync_single_for_device(ib_dev, tx_desc->dma_addr,
883 ISER_HEADERS_LEN, DMA_TO_DEVICE);
884
885 send_wr.next = NULL;
886 send_wr.wr_id = (unsigned long)tx_desc;
887 send_wr.sg_list = tx_desc->tx_sg;
888 send_wr.num_sge = tx_desc->num_sge;
889 send_wr.opcode = IB_WR_SEND;
890 send_wr.send_flags = IB_SEND_SIGNALED;
891
892 atomic_inc(&isert_conn->post_send_buf_count);
893
894 ret = ib_post_send(isert_conn->conn_qp, &send_wr, &send_wr_failed);
895 if (ret) {
896 pr_err("ib_post_send() failed, ret: %d\n", ret);
897 atomic_dec(&isert_conn->post_send_buf_count);
898 }
899
900 return ret;
901}
902
903static void
904isert_create_send_desc(struct isert_conn *isert_conn,
905 struct isert_cmd *isert_cmd,
906 struct iser_tx_desc *tx_desc)
907{
908 struct ib_device *ib_dev = isert_conn->conn_cm_id->device;
909
910 ib_dma_sync_single_for_cpu(ib_dev, tx_desc->dma_addr,
911 ISER_HEADERS_LEN, DMA_TO_DEVICE);
912
913 memset(&tx_desc->iser_header, 0, sizeof(struct iser_hdr));
914 tx_desc->iser_header.flags = ISER_VER;
915
916 tx_desc->num_sge = 1;
917 tx_desc->isert_cmd = isert_cmd;
918
919 if (tx_desc->tx_sg[0].lkey != isert_conn->conn_mr->lkey) {
920 tx_desc->tx_sg[0].lkey = isert_conn->conn_mr->lkey;
921 pr_debug("tx_desc %p lkey mismatch, fixing\n", tx_desc);
922 }
923}
924
925static int
926isert_init_tx_hdrs(struct isert_conn *isert_conn,
927 struct iser_tx_desc *tx_desc)
928{
929 struct ib_device *ib_dev = isert_conn->conn_cm_id->device;
930 u64 dma_addr;
931
932 dma_addr = ib_dma_map_single(ib_dev, (void *)tx_desc,
933 ISER_HEADERS_LEN, DMA_TO_DEVICE);
934 if (ib_dma_mapping_error(ib_dev, dma_addr)) {
935 pr_err("ib_dma_mapping_error() failed\n");
936 return -ENOMEM;
937 }
938
939 tx_desc->dma_addr = dma_addr;
940 tx_desc->tx_sg[0].addr = tx_desc->dma_addr;
941 tx_desc->tx_sg[0].length = ISER_HEADERS_LEN;
942 tx_desc->tx_sg[0].lkey = isert_conn->conn_mr->lkey;
943
944 pr_debug("isert_init_tx_hdrs: Setup tx_sg[0].addr: 0x%llx length: %u"
945 " lkey: 0x%08x\n", tx_desc->tx_sg[0].addr,
946 tx_desc->tx_sg[0].length, tx_desc->tx_sg[0].lkey);
947
948 return 0;
949}
950
951static void
95b60f07
NB		 952isert_init_send_wr(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd,
953 struct ib_send_wr *send_wr, bool coalesce)
b8d26b3b 954{
95b60f07
NB		 955 struct iser_tx_desc *tx_desc = &isert_cmd->tx_desc;
956
b8d26b3b
NB		 957 isert_cmd->rdma_wr.iser_ib_op = ISER_IB_SEND;
958 send_wr->wr_id = (unsigned long)&isert_cmd->tx_desc;
959 send_wr->opcode = IB_WR_SEND;
95b60f07 960 send_wr->sg_list = &tx_desc->tx_sg[0];
b8d26b3b 961 send_wr->num_sge = isert_cmd->tx_desc.num_sge;
95b60f07
NB		 962 /*
963 * Coalesce send completion interrupts by only setting IB_SEND_SIGNALED
964 * bit for every ISERT_COMP_BATCH_COUNT number of ib_post_send() calls.
965 */
ebbe4421
NB		 966 mutex_lock(&isert_conn->conn_mutex);
967 if (coalesce && isert_conn->state == ISER_CONN_UP &&
95b60f07 968 ++isert_conn->conn_comp_batch < ISERT_COMP_BATCH_COUNT) {
ebbe4421 969 tx_desc->llnode_active = true;
95b60f07 970 llist_add(&tx_desc->comp_llnode, &isert_conn->conn_comp_llist);
ebbe4421 971 mutex_unlock(&isert_conn->conn_mutex);
95b60f07
NB		 972 return;
973 }
974 isert_conn->conn_comp_batch = 0;
975 tx_desc->comp_llnode_batch = llist_del_all(&isert_conn->conn_comp_llist);
ebbe4421 976 mutex_unlock(&isert_conn->conn_mutex);
95b60f07
NB		 977
978 send_wr->send_flags = IB_SEND_SIGNALED;
b8d26b3b
NB		 979}
980
981static int
982isert_rdma_post_recvl(struct isert_conn *isert_conn)
983{
984 struct ib_recv_wr rx_wr, *rx_wr_fail;
985 struct ib_sge sge;
986 int ret;
987
988 memset(&sge, 0, sizeof(struct ib_sge));
989 sge.addr = isert_conn->login_req_dma;
990 sge.length = ISER_RX_LOGIN_SIZE;
991 sge.lkey = isert_conn->conn_mr->lkey;
992
993 pr_debug("Setup sge: addr: %llx length: %d 0x%08x\n",
994 sge.addr, sge.length, sge.lkey);
995
996 memset(&rx_wr, 0, sizeof(struct ib_recv_wr));
997 rx_wr.wr_id = (unsigned long)isert_conn->login_req_buf;
998 rx_wr.sg_list = &sge;
999 rx_wr.num_sge = 1;
1000
1001 isert_conn->post_recv_buf_count++;
1002 ret = ib_post_recv(isert_conn->conn_qp, &rx_wr, &rx_wr_fail);
1003 if (ret) {
1004 pr_err("ib_post_recv() failed: %d\n", ret);
1005 isert_conn->post_recv_buf_count--;
1006 }
1007
1008 pr_debug("ib_post_recv(): returned success >>>>>>>>>>>>>>>>>>>>>>>>\n");
1009 return ret;
1010}
1011
1012static int
1013isert_put_login_tx(struct iscsi_conn *conn, struct iscsi_login *login,
1014 u32 length)
1015{
1016 struct isert_conn *isert_conn = conn->context;
1017 struct ib_device *ib_dev = isert_conn->conn_cm_id->device;
1018 struct iser_tx_desc *tx_desc = &isert_conn->conn_login_tx_desc;
1019 int ret;
1020
1021 isert_create_send_desc(isert_conn, NULL, tx_desc);
1022
1023 memcpy(&tx_desc->iscsi_header, &login->rsp[0],
1024 sizeof(struct iscsi_hdr));
1025
1026 isert_init_tx_hdrs(isert_conn, tx_desc);
1027
1028 if (length > 0) {
1029 struct ib_sge *tx_dsg = &tx_desc->tx_sg[1];
1030
1031 ib_dma_sync_single_for_cpu(ib_dev, isert_conn->login_rsp_dma,
1032 length, DMA_TO_DEVICE);
1033
1034 memcpy(isert_conn->login_rsp_buf, login->rsp_buf, length);
1035
1036 ib_dma_sync_single_for_device(ib_dev, isert_conn->login_rsp_dma,
1037 length, DMA_TO_DEVICE);
1038
1039 tx_dsg->addr = isert_conn->login_rsp_dma;
1040 tx_dsg->length = length;
1041 tx_dsg->lkey = isert_conn->conn_mr->lkey;
1042 tx_desc->num_sge = 2;
1043 }
1044 if (!login->login_failed) {
1045 if (login->login_complete) {
f46d6a8a
NB		 1046 if (isert_conn->conn_device->use_fastreg) {
1047 u8 pi_support = login->np->tpg_np->tpg->tpg_attrib.t10_pi;
1048
1049 ret = isert_conn_create_fastreg_pool(isert_conn,
1050 pi_support);
1051 if (ret) {
1052 pr_err("Conn: %p failed to create"
1053 " fastreg pool\n", isert_conn);
1054 return ret;
1055 }
1056 }
1057
b8d26b3b
NB		 1058 ret = isert_alloc_rx_descriptors(isert_conn);
1059 if (ret)
1060 return ret;
1061
1062 ret = isert_post_recv(isert_conn, ISERT_MIN_POSTED_RX);
1063 if (ret)
1064 return ret;
1065
1066 isert_conn->state = ISER_CONN_UP;
1067 goto post_send;
1068 }
1069
1070 ret = isert_rdma_post_recvl(isert_conn);
1071 if (ret)
1072 return ret;
1073 }
1074post_send:
1075 ret = isert_post_send(isert_conn, tx_desc);
1076 if (ret)
1077 return ret;
1078
1079 return 0;
1080}
1081
1082static void
1083isert_rx_login_req(struct iser_rx_desc *rx_desc, int rx_buflen,
1084 struct isert_conn *isert_conn)
1085{
1086 struct iscsi_conn *conn = isert_conn->conn;
1087 struct iscsi_login *login = conn->conn_login;
1088 int size;
1089
1090 if (!login) {
1091 pr_err("conn->conn_login is NULL\n");
1092 dump_stack();
1093 return;
1094 }
1095
1096 if (login->first_request) {
1097 struct iscsi_login_req *login_req =
1098 (struct iscsi_login_req *)&rx_desc->iscsi_header;
1099 /*
1100 * Setup the initial iscsi_login values from the leading
1101 * login request PDU.
1102 */
1103 login->leading_connection = (!login_req->tsih) ? 1 : 0;
1104 login->current_stage =
1105 (login_req->flags & ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK)
1106 >> 2;
1107 login->version_min = login_req->min_version;
1108 login->version_max = login_req->max_version;
1109 memcpy(login->isid, login_req->isid, 6);
1110 login->cmd_sn = be32_to_cpu(login_req->cmdsn);
1111 login->init_task_tag = login_req->itt;
1112 login->initial_exp_statsn = be32_to_cpu(login_req->exp_statsn);
1113 login->cid = be16_to_cpu(login_req->cid);
1114 login->tsih = be16_to_cpu(login_req->tsih);
1115 }
1116
1117 memcpy(&login->req[0], (void *)&rx_desc->iscsi_header, ISCSI_HDR_LEN);
1118
1119 size = min(rx_buflen, MAX_KEY_VALUE_PAIRS);
1120 pr_debug("Using login payload size: %d, rx_buflen: %d MAX_KEY_VALUE_PAIRS: %d\n",
1121 size, rx_buflen, MAX_KEY_VALUE_PAIRS);
1122 memcpy(login->req_buf, &rx_desc->data[0], size);
1123
6faaa85f
NB		 1124 if (login->first_request) {
1125 complete(&isert_conn->conn_login_comp);
1126 return;
1127 }
1128 schedule_delayed_work(&conn->login_work, 0);
b8d26b3b
NB		 1129}
1130
b8d26b3b 1131static struct iscsi_cmd
676687c6 1132*isert_allocate_cmd(struct iscsi_conn *conn)
b8d26b3b
NB		 1133{
1134 struct isert_conn *isert_conn = (struct isert_conn *)conn->context;
1135 struct isert_cmd *isert_cmd;
d703ce2f 1136 struct iscsi_cmd *cmd;
b8d26b3b 1137
676687c6 1138 cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE);
d703ce2f
NB		 1139 if (!cmd) {
1140 pr_err("Unable to allocate iscsi_cmd + isert_cmd\n");
b8d26b3b
NB		 1141 return NULL;
1142 }
d703ce2f 1143 isert_cmd = iscsit_priv_cmd(cmd);
b8d26b3b 1144 isert_cmd->conn = isert_conn;
d703ce2f 1145 isert_cmd->iscsi_cmd = cmd;
b8d26b3b 1146
d703ce2f 1147 return cmd;
b8d26b3b
NB		 1148}
1149
1150static int
1151isert_handle_scsi_cmd(struct isert_conn *isert_conn,
d703ce2f
NB		 1152 struct isert_cmd *isert_cmd, struct iscsi_cmd *cmd,
1153 struct iser_rx_desc *rx_desc, unsigned char *buf)
b8d26b3b 1154{
b8d26b3b
NB		 1155 struct iscsi_conn *conn = isert_conn->conn;
1156 struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)buf;
1157 struct scatterlist *sg;
1158 int imm_data, imm_data_len, unsol_data, sg_nents, rc;
1159 bool dump_payload = false;
1160
1161 rc = iscsit_setup_scsi_cmd(conn, cmd, buf);
1162 if (rc < 0)
1163 return rc;
1164
1165 imm_data = cmd->immediate_data;
1166 imm_data_len = cmd->first_burst_len;
1167 unsol_data = cmd->unsolicited_data;
1168
1169 rc = iscsit_process_scsi_cmd(conn, cmd, hdr);
1170 if (rc < 0) {
1171 return 0;
1172 } else if (rc > 0) {
1173 dump_payload = true;
1174 goto sequence_cmd;
1175 }
1176
1177 if (!imm_data)
1178 return 0;
1179
1180 sg = &cmd->se_cmd.t_data_sg[0];
1181 sg_nents = max(1UL, DIV_ROUND_UP(imm_data_len, PAGE_SIZE));
1182
1183 pr_debug("Copying Immediate SG: %p sg_nents: %u from %p imm_data_len: %d\n",
1184 sg, sg_nents, &rx_desc->data[0], imm_data_len);
1185
1186 sg_copy_from_buffer(sg, sg_nents, &rx_desc->data[0], imm_data_len);
1187
1188 cmd->write_data_done += imm_data_len;
1189
1190 if (cmd->write_data_done == cmd->se_cmd.data_length) {
1191 spin_lock_bh(&cmd->istate_lock);
1192 cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT;
1193 cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT;
1194 spin_unlock_bh(&cmd->istate_lock);
1195 }
1196
1197sequence_cmd:
561bf158 1198 rc = iscsit_sequence_cmd(conn, cmd, buf, hdr->cmdsn);
b8d26b3b
NB		 1199
1200 if (!rc && dump_payload == false && unsol_data)
1201 iscsit_set_unsoliticed_dataout(cmd);
1202
b8d26b3b
NB		 1203 return 0;
1204}
1205
1206static int
1207isert_handle_iscsi_dataout(struct isert_conn *isert_conn,
1208 struct iser_rx_desc *rx_desc, unsigned char *buf)
1209{
1210 struct scatterlist *sg_start;
1211 struct iscsi_conn *conn = isert_conn->conn;
1212 struct iscsi_cmd *cmd = NULL;
1213 struct iscsi_data *hdr = (struct iscsi_data *)buf;
1214 u32 unsol_data_len = ntoh24(hdr->dlength);
1215 int rc, sg_nents, sg_off, page_off;
1216
1217 rc = iscsit_check_dataout_hdr(conn, buf, &cmd);
1218 if (rc < 0)
1219 return rc;
1220 else if (!cmd)
1221 return 0;
1222 /*
1223 * FIXME: Unexpected unsolicited_data out
1224 */
1225 if (!cmd->unsolicited_data) {
1226 pr_err("Received unexpected solicited data payload\n");
1227 dump_stack();
1228 return -1;
1229 }
1230
1231 pr_debug("Unsolicited DataOut unsol_data_len: %u, write_data_done: %u, data_length: %u\n",
1232 unsol_data_len, cmd->write_data_done, cmd->se_cmd.data_length);
1233
1234 sg_off = cmd->write_data_done / PAGE_SIZE;
1235 sg_start = &cmd->se_cmd.t_data_sg[sg_off];
1236 sg_nents = max(1UL, DIV_ROUND_UP(unsol_data_len, PAGE_SIZE));
1237 page_off = cmd->write_data_done % PAGE_SIZE;
1238 /*
1239 * FIXME: Non page-aligned unsolicited_data out
1240 */
1241 if (page_off) {
1242 pr_err("Received unexpected non-page aligned data payload\n");
1243 dump_stack();
1244 return -1;
1245 }
1246 pr_debug("Copying DataOut: sg_start: %p, sg_off: %u sg_nents: %u from %p %u\n",
1247 sg_start, sg_off, sg_nents, &rx_desc->data[0], unsol_data_len);
1248
1249 sg_copy_from_buffer(sg_start, sg_nents, &rx_desc->data[0],
1250 unsol_data_len);
1251
1252 rc = iscsit_check_dataout_payload(cmd, hdr, false);
1253 if (rc < 0)
1254 return rc;
1255
1256 return 0;
1257}
1258
778de368
NB		 1259static int
1260isert_handle_nop_out(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd,
d703ce2f
NB		 1261 struct iscsi_cmd *cmd, struct iser_rx_desc *rx_desc,
1262 unsigned char *buf)
778de368 1263{
778de368
NB		 1264 struct iscsi_conn *conn = isert_conn->conn;
1265 struct iscsi_nopout *hdr = (struct iscsi_nopout *)buf;
1266 int rc;
1267
1268 rc = iscsit_setup_nop_out(conn, cmd, hdr);
1269 if (rc < 0)
1270 return rc;
1271 /*
1272 * FIXME: Add support for NOPOUT payload using unsolicited RDMA payload
1273 */
1274
1275 return iscsit_process_nop_out(conn, cmd, hdr);
1276}
1277
adb54c29
NB		 1278static int
1279isert_handle_text_cmd(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd,
d703ce2f
NB		 1280 struct iscsi_cmd *cmd, struct iser_rx_desc *rx_desc,
1281 struct iscsi_text *hdr)
adb54c29 1282{
adb54c29
NB		 1283 struct iscsi_conn *conn = isert_conn->conn;
1284 u32 payload_length = ntoh24(hdr->dlength);
1285 int rc;
1286 unsigned char *text_in;
1287
1288 rc = iscsit_setup_text_cmd(conn, cmd, hdr);
1289 if (rc < 0)
1290 return rc;
1291
1292 text_in = kzalloc(payload_length, GFP_KERNEL);
1293 if (!text_in) {
1294 pr_err("Unable to allocate text_in of payload_length: %u\n",
1295 payload_length);
1296 return -ENOMEM;
1297 }
1298 cmd->text_in_ptr = text_in;
1299
1300 memcpy(cmd->text_in_ptr, &rx_desc->data[0], payload_length);
1301
1302 return iscsit_process_text_cmd(conn, cmd, hdr);
1303}
1304
b8d26b3b
NB		 1305static int
1306isert_rx_opcode(struct isert_conn *isert_conn, struct iser_rx_desc *rx_desc,
1307 uint32_t read_stag, uint64_t read_va,
1308 uint32_t write_stag, uint64_t write_va)
1309{
1310 struct iscsi_hdr *hdr = &rx_desc->iscsi_header;
1311 struct iscsi_conn *conn = isert_conn->conn;
ca40d24e 1312 struct iscsi_session *sess = conn->sess;
b8d26b3b
NB		 1313 struct iscsi_cmd *cmd;
1314 struct isert_cmd *isert_cmd;
1315 int ret = -EINVAL;
1316 u8 opcode = (hdr->opcode & ISCSI_OPCODE_MASK);
1317
ca40d24e
NB		 1318 if (sess->sess_ops->SessionType &&
1319 (!(opcode & ISCSI_OP_TEXT) || !(opcode & ISCSI_OP_LOGOUT))) {
1320 pr_err("Got illegal opcode: 0x%02x in SessionType=Discovery,"
1321 " ignoring\n", opcode);
1322 return 0;
1323 }
1324
b8d26b3b
NB		 1325 switch (opcode) {
1326 case ISCSI_OP_SCSI_CMD:
676687c6 1327 cmd = isert_allocate_cmd(conn);
b8d26b3b
NB		 1328 if (!cmd)
1329 break;
1330
d703ce2f 1331 isert_cmd = iscsit_priv_cmd(cmd);
b8d26b3b
NB		 1332 isert_cmd->read_stag = read_stag;
1333 isert_cmd->read_va = read_va;
1334 isert_cmd->write_stag = write_stag;
1335 isert_cmd->write_va = write_va;
1336
d703ce2f 1337 ret = isert_handle_scsi_cmd(isert_conn, isert_cmd, cmd,
b8d26b3b
NB		 1338 rx_desc, (unsigned char *)hdr);
1339 break;
1340 case ISCSI_OP_NOOP_OUT:
676687c6 1341 cmd = isert_allocate_cmd(conn);
b8d26b3b
NB		 1342 if (!cmd)
1343 break;
1344
d703ce2f
NB		 1345 isert_cmd = iscsit_priv_cmd(cmd);
1346 ret = isert_handle_nop_out(isert_conn, isert_cmd, cmd,
778de368 1347 rx_desc, (unsigned char *)hdr);
b8d26b3b
NB		 1348 break;
1349 case ISCSI_OP_SCSI_DATA_OUT:
1350 ret = isert_handle_iscsi_dataout(isert_conn, rx_desc,
1351 (unsigned char *)hdr);
1352 break;
1353 case ISCSI_OP_SCSI_TMFUNC:
676687c6 1354 cmd = isert_allocate_cmd(conn);
b8d26b3b
NB		 1355 if (!cmd)
1356 break;
1357
1358 ret = iscsit_handle_task_mgt_cmd(conn, cmd,
1359 (unsigned char *)hdr);
1360 break;
1361 case ISCSI_OP_LOGOUT:
676687c6 1362 cmd = isert_allocate_cmd(conn);
b8d26b3b
NB		 1363 if (!cmd)
1364 break;
1365
1366 ret = iscsit_handle_logout_cmd(conn, cmd, (unsigned char *)hdr);
1367 if (ret > 0)
1368 wait_for_completion_timeout(&conn->conn_logout_comp,
1369 SECONDS_FOR_LOGOUT_COMP *
1370 HZ);
1371 break;
adb54c29 1372 case ISCSI_OP_TEXT:
676687c6 1373 cmd = isert_allocate_cmd(conn);
adb54c29
NB		 1374 if (!cmd)
1375 break;
1376
d703ce2f
NB		 1377 isert_cmd = iscsit_priv_cmd(cmd);
1378 ret = isert_handle_text_cmd(isert_conn, isert_cmd, cmd,
adb54c29
NB		 1379 rx_desc, (struct iscsi_text *)hdr);
1380 break;
b8d26b3b
NB		 1381 default:
1382 pr_err("Got unknown iSCSI OpCode: 0x%02x\n", opcode);
1383 dump_stack();
1384 break;
1385 }
1386
1387 return ret;
1388}
1389
1390static void
1391isert_rx_do_work(struct iser_rx_desc *rx_desc, struct isert_conn *isert_conn)
1392{
1393 struct iser_hdr *iser_hdr = &rx_desc->iser_header;
1394 uint64_t read_va = 0, write_va = 0;
1395 uint32_t read_stag = 0, write_stag = 0;
1396 int rc;
1397
1398 switch (iser_hdr->flags & 0xF0) {
1399 case ISCSI_CTRL:
1400 if (iser_hdr->flags & ISER_RSV) {
1401 read_stag = be32_to_cpu(iser_hdr->read_stag);
1402 read_va = be64_to_cpu(iser_hdr->read_va);
1403 pr_debug("ISER_RSV: read_stag: 0x%08x read_va: 0x%16llx\n",
1404 read_stag, (unsigned long long)read_va);
1405 }
1406 if (iser_hdr->flags & ISER_WSV) {
1407 write_stag = be32_to_cpu(iser_hdr->write_stag);
1408 write_va = be64_to_cpu(iser_hdr->write_va);
1409 pr_debug("ISER_WSV: write__stag: 0x%08x write_va: 0x%16llx\n",
1410 write_stag, (unsigned long long)write_va);
1411 }
1412
1413 pr_debug("ISER ISCSI_CTRL PDU\n");
1414 break;
1415 case ISER_HELLO:
1416 pr_err("iSER Hello message\n");
1417 break;
1418 default:
1419 pr_warn("Unknown iSER hdr flags: 0x%02x\n", iser_hdr->flags);
1420 break;
1421 }
1422
1423 rc = isert_rx_opcode(isert_conn, rx_desc,
1424 read_stag, read_va, write_stag, write_va);
1425}
1426
1427static void
1428isert_rx_completion(struct iser_rx_desc *desc, struct isert_conn *isert_conn,
1429 unsigned long xfer_len)
1430{
1431 struct ib_device *ib_dev = isert_conn->conn_cm_id->device;
1432 struct iscsi_hdr *hdr;
1433 u64 rx_dma;
1434 int rx_buflen, outstanding;
1435
1436 if ((char *)desc == isert_conn->login_req_buf) {
1437 rx_dma = isert_conn->login_req_dma;
1438 rx_buflen = ISER_RX_LOGIN_SIZE;
1439 pr_debug("ISER login_buf: Using rx_dma: 0x%llx, rx_buflen: %d\n",
1440 rx_dma, rx_buflen);
1441 } else {
1442 rx_dma = desc->dma_addr;
1443 rx_buflen = ISER_RX_PAYLOAD_SIZE;
1444 pr_debug("ISER req_buf: Using rx_dma: 0x%llx, rx_buflen: %d\n",
1445 rx_dma, rx_buflen);
1446 }
1447
1448 ib_dma_sync_single_for_cpu(ib_dev, rx_dma, rx_buflen, DMA_FROM_DEVICE);
1449
1450 hdr = &desc->iscsi_header;
1451 pr_debug("iSCSI opcode: 0x%02x, ITT: 0x%08x, flags: 0x%02x dlen: %d\n",
1452 hdr->opcode, hdr->itt, hdr->flags,
1453 (int)(xfer_len - ISER_HEADERS_LEN));
1454
1455 if ((char *)desc == isert_conn->login_req_buf)
1456 isert_rx_login_req(desc, xfer_len - ISER_HEADERS_LEN,
1457 isert_conn);
1458 else
1459 isert_rx_do_work(desc, isert_conn);
1460
1461 ib_dma_sync_single_for_device(ib_dev, rx_dma, rx_buflen,
1462 DMA_FROM_DEVICE);
1463
1464 isert_conn->post_recv_buf_count--;
1465 pr_debug("iSERT: Decremented post_recv_buf_count: %d\n",
1466 isert_conn->post_recv_buf_count);
1467
1468 if ((char *)desc == isert_conn->login_req_buf)
1469 return;
1470
1471 outstanding = isert_conn->post_recv_buf_count;
1472 if (outstanding + ISERT_MIN_POSTED_RX <= ISERT_QP_MAX_RECV_DTOS) {
1473 int err, count = min(ISERT_QP_MAX_RECV_DTOS - outstanding,
1474 ISERT_MIN_POSTED_RX);
1475 err = isert_post_recv(isert_conn, count);
1476 if (err) {
1477 pr_err("isert_post_recv() count: %d failed, %d\n",
1478 count, err);
1479 }
1480 }
1481}
1482
e3d7e4c3
SG		 1483static int
1484isert_map_data_buf(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd,
1485 struct scatterlist *sg, u32 nents, u32 length, u32 offset,
1486 enum iser_ib_op_code op, struct isert_data_buf *data)
1487{
1488 struct ib_device *ib_dev = isert_conn->conn_cm_id->device;
1489
1490 data->dma_dir = op == ISER_IB_RDMA_WRITE ?
1491 DMA_TO_DEVICE : DMA_FROM_DEVICE;
1492
1493 data->len = length - offset;
1494 data->offset = offset;
1495 data->sg_off = data->offset / PAGE_SIZE;
1496
1497 data->sg = &sg[data->sg_off];
1498 data->nents = min_t(unsigned int, nents - data->sg_off,
1499 ISCSI_ISER_SG_TABLESIZE);
1500 data->len = min_t(unsigned int, data->len, ISCSI_ISER_SG_TABLESIZE *
1501 PAGE_SIZE);
1502
1503 data->dma_nents = ib_dma_map_sg(ib_dev, data->sg, data->nents,
1504 data->dma_dir);
1505 if (unlikely(!data->dma_nents)) {
1506 pr_err("Cmd: unable to dma map SGs %p\n", sg);
1507 return -EINVAL;
1508 }
1509
1510 pr_debug("Mapped cmd: %p count: %u sg: %p sg_nents: %u rdma_len %d\n",
1511 isert_cmd, data->dma_nents, data->sg, data->nents, data->len);
1512
1513 return 0;
1514}
1515
1516static void
1517isert_unmap_data_buf(struct isert_conn *isert_conn, struct isert_data_buf *data)
1518{
1519 struct ib_device *ib_dev = isert_conn->conn_cm_id->device;
1520
1521 ib_dma_unmap_sg(ib_dev, data->sg, data->nents, data->dma_dir);
1522 memset(data, 0, sizeof(*data));
1523}
1524
1525
1526
b8d26b3b
NB		 1527static void
1528isert_unmap_cmd(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn)
1529{
1530 struct isert_rdma_wr *wr = &isert_cmd->rdma_wr;
b8d26b3b 1531
90ecc6e2 1532 pr_debug("isert_unmap_cmd: %p\n", isert_cmd);
e3d7e4c3
SG		 1533
1534 if (wr->data.sg) {
90ecc6e2 1535 pr_debug("isert_unmap_cmd: %p unmap_sg op\n", isert_cmd);
e3d7e4c3 1536 isert_unmap_data_buf(isert_conn, &wr->data);
b8d26b3b
NB		 1537 }
1538
90ecc6e2
VP		 1539 if (wr->send_wr) {
1540 pr_debug("isert_unmap_cmd: %p free send_wr\n", isert_cmd);
1541 kfree(wr->send_wr);
1542 wr->send_wr = NULL;
1543 }
b8d26b3b 1544
90ecc6e2
VP		 1545 if (wr->ib_sge) {
1546 pr_debug("isert_unmap_cmd: %p free ib_sge\n", isert_cmd);
1547 kfree(wr->ib_sge);
1548 wr->ib_sge = NULL;
1549 }
b8d26b3b
NB		 1550}
1551
59464ef4 1552static void
a3a5a826 1553isert_unreg_rdma(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn)
59464ef4
VP		 1554{
1555 struct isert_rdma_wr *wr = &isert_cmd->rdma_wr;
59464ef4
VP		 1556 LIST_HEAD(unmap_list);
1557
a3a5a826 1558 pr_debug("unreg_fastreg_cmd: %p\n", isert_cmd);
59464ef4
VP		 1559
1560 if (wr->fr_desc) {
a3a5a826 1561 pr_debug("unreg_fastreg_cmd: %p free fr_desc %p\n",
59464ef4 1562 isert_cmd, wr->fr_desc);
9e961ae7
SG		 1563 if (wr->fr_desc->ind & ISERT_PROTECTED) {
1564 isert_unmap_data_buf(isert_conn, &wr->prot);
1565 wr->fr_desc->ind &= ~ISERT_PROTECTED;
1566 }
59464ef4 1567 spin_lock_bh(&isert_conn->conn_lock);
a3a5a826 1568 list_add_tail(&wr->fr_desc->list, &isert_conn->conn_fr_pool);
59464ef4
VP		 1569 spin_unlock_bh(&isert_conn->conn_lock);
1570 wr->fr_desc = NULL;
1571 }
1572
e3d7e4c3 1573 if (wr->data.sg) {
a3a5a826 1574 pr_debug("unreg_fastreg_cmd: %p unmap_sg op\n", isert_cmd);
e3d7e4c3 1575 isert_unmap_data_buf(isert_conn, &wr->data);
59464ef4
VP		 1576 }
1577
1578 wr->ib_sge = NULL;
1579 wr->send_wr = NULL;
1580}
1581
b8d26b3b
NB		 1582static void
1583isert_put_cmd(struct isert_cmd *isert_cmd)
1584{
d703ce2f 1585 struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd;
b8d26b3b 1586 struct isert_conn *isert_conn = isert_cmd->conn;
186a9647 1587 struct iscsi_conn *conn = isert_conn->conn;
d40945d8 1588 struct isert_device *device = isert_conn->conn_device;
b8d26b3b
NB		 1589
1590 pr_debug("Entering isert_put_cmd: %p\n", isert_cmd);
1591
1592 switch (cmd->iscsi_opcode) {
1593 case ISCSI_OP_SCSI_CMD:
b8d26b3b
NB		 1594 spin_lock_bh(&conn->cmd_lock);
1595 if (!list_empty(&cmd->i_conn_node))
5159d763 1596 list_del_init(&cmd->i_conn_node);
b8d26b3b
NB		 1597 spin_unlock_bh(&conn->cmd_lock);
1598
1599 if (cmd->data_direction == DMA_TO_DEVICE)
1600 iscsit_stop_dataout_timer(cmd);
1601
d40945d8 1602 device->unreg_rdma_mem(isert_cmd, isert_conn);
186a9647
NB		 1603 transport_generic_free_cmd(&cmd->se_cmd, 0);
1604 break;
b8d26b3b 1605 case ISCSI_OP_SCSI_TMFUNC:
186a9647
NB		 1606 spin_lock_bh(&conn->cmd_lock);
1607 if (!list_empty(&cmd->i_conn_node))
5159d763 1608 list_del_init(&cmd->i_conn_node);
186a9647
NB		 1609 spin_unlock_bh(&conn->cmd_lock);
1610
b8d26b3b
NB		 1611 transport_generic_free_cmd(&cmd->se_cmd, 0);
1612 break;
1613 case ISCSI_OP_REJECT:
1614 case ISCSI_OP_NOOP_OUT:
adb54c29 1615 case ISCSI_OP_TEXT:
b8d26b3b
NB		 1616 spin_lock_bh(&conn->cmd_lock);
1617 if (!list_empty(&cmd->i_conn_node))
5159d763 1618 list_del_init(&cmd->i_conn_node);
b8d26b3b
NB		 1619 spin_unlock_bh(&conn->cmd_lock);
1620
1621 /*
1622 * Handle special case for REJECT when iscsi_add_reject*() has
1623 * overwritten the original iscsi_opcode assignment, and the
1624 * associated cmd->se_cmd needs to be released.
1625 */
1626 if (cmd->se_cmd.se_tfo != NULL) {
3df8f68a
NB		 1627 pr_debug("Calling transport_generic_free_cmd from"
1628 " isert_put_cmd for 0x%02x\n",
1629 cmd->iscsi_opcode);
b8d26b3b
NB		 1630 transport_generic_free_cmd(&cmd->se_cmd, 0);
1631 break;
1632 }
1633 /*
1634 * Fall-through
1635 */
1636 default:
d703ce2f 1637 iscsit_release_cmd(cmd);
b8d26b3b
NB		 1638 break;
1639 }
1640}
1641
1642static void
1643isert_unmap_tx_desc(struct iser_tx_desc *tx_desc, struct ib_device *ib_dev)
1644{
1645 if (tx_desc->dma_addr != 0) {
1646 pr_debug("Calling ib_dma_unmap_single for tx_desc->dma_addr\n");
1647 ib_dma_unmap_single(ib_dev, tx_desc->dma_addr,
1648 ISER_HEADERS_LEN, DMA_TO_DEVICE);
1649 tx_desc->dma_addr = 0;
1650 }
1651}
1652
1653static void
1654isert_completion_put(struct iser_tx_desc *tx_desc, struct isert_cmd *isert_cmd,
1655 struct ib_device *ib_dev)
1656{
dbbc5d11
NB		 1657 if (isert_cmd->pdu_buf_dma != 0) {
1658 pr_debug("Calling ib_dma_unmap_single for isert_cmd->pdu_buf_dma\n");
1659 ib_dma_unmap_single(ib_dev, isert_cmd->pdu_buf_dma,
1660 isert_cmd->pdu_buf_len, DMA_TO_DEVICE);
1661 isert_cmd->pdu_buf_dma = 0;
b8d26b3b
NB		 1662 }
1663
1664 isert_unmap_tx_desc(tx_desc, ib_dev);
1665 isert_put_cmd(isert_cmd);
1666}
1667
96b7973e
SG		 1668static int
1669isert_check_pi_status(struct se_cmd *se_cmd, struct ib_mr *sig_mr)
1670{
1671 struct ib_mr_status mr_status;
1672 int ret;
1673
1674 ret = ib_check_mr_status(sig_mr, IB_MR_CHECK_SIG_STATUS, &mr_status);
1675 if (ret) {
1676 pr_err("ib_check_mr_status failed, ret %d\n", ret);
1677 goto fail_mr_status;
1678 }
1679
1680 if (mr_status.fail_status & IB_MR_CHECK_SIG_STATUS) {
1681 u64 sec_offset_err;
1682 u32 block_size = se_cmd->se_dev->dev_attrib.block_size + 8;
1683
1684 switch (mr_status.sig_err.err_type) {
1685 case IB_SIG_BAD_GUARD:
1686 se_cmd->pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED;
1687 break;
1688 case IB_SIG_BAD_REFTAG:
1689 se_cmd->pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED;
1690 break;
1691 case IB_SIG_BAD_APPTAG:
1692 se_cmd->pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED;
1693 break;
1694 }
1695 sec_offset_err = mr_status.sig_err.sig_err_offset;
1696 do_div(sec_offset_err, block_size);
1697 se_cmd->bad_sector = sec_offset_err + se_cmd->t_task_lba;
1698
1699 pr_err("isert: PI error found type %d at sector 0x%llx "
1700 "expected 0x%x vs actual 0x%x\n",
1701 mr_status.sig_err.err_type,
1702 (unsigned long long)se_cmd->bad_sector,
1703 mr_status.sig_err.expected,
1704 mr_status.sig_err.actual);
1705 ret = 1;
1706 }
1707
1708fail_mr_status:
1709 return ret;
1710}
1711
f93f3a70
SG		 1712static void
1713isert_completion_rdma_write(struct iser_tx_desc *tx_desc,
1714 struct isert_cmd *isert_cmd)
1715{
9e961ae7 1716 struct isert_rdma_wr *wr = &isert_cmd->rdma_wr;
f93f3a70 1717 struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd;
9e961ae7 1718 struct se_cmd *se_cmd = &cmd->se_cmd;
f93f3a70
SG		 1719 struct isert_conn *isert_conn = isert_cmd->conn;
1720 struct isert_device *device = isert_conn->conn_device;
9e961ae7
SG		 1721 int ret = 0;
1722
1723 if (wr->fr_desc && wr->fr_desc->ind & ISERT_PROTECTED) {
96b7973e
SG		 1724 ret = isert_check_pi_status(se_cmd,
1725 wr->fr_desc->pi_ctx->sig_mr);
1726 wr->fr_desc->ind &= ~ISERT_PROTECTED;
9e961ae7 1727 }
f93f3a70
SG		 1728
1729 device->unreg_rdma_mem(isert_cmd, isert_conn);
897bb2c9 1730 wr->send_wr_num = 0;
9e961ae7
SG		 1731 if (ret)
1732 transport_send_check_condition_and_sense(se_cmd,
1733 se_cmd->pi_err, 0);
1734 else
1735 isert_put_response(isert_conn->conn, cmd);
f93f3a70
SG		 1736}
1737
b8d26b3b
NB		 1738static void
1739isert_completion_rdma_read(struct iser_tx_desc *tx_desc,
1740 struct isert_cmd *isert_cmd)
1741{
1742 struct isert_rdma_wr *wr = &isert_cmd->rdma_wr;
d703ce2f 1743 struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd;
b8d26b3b 1744 struct se_cmd *se_cmd = &cmd->se_cmd;
90ecc6e2 1745 struct isert_conn *isert_conn = isert_cmd->conn;
d40945d8 1746 struct isert_device *device = isert_conn->conn_device;
5bac4b1a 1747 int ret = 0;
b8d26b3b 1748
9e961ae7 1749 if (wr->fr_desc && wr->fr_desc->ind & ISERT_PROTECTED) {
96b7973e
SG		 1750 ret = isert_check_pi_status(se_cmd,
1751 wr->fr_desc->pi_ctx->sig_mr);
1752 wr->fr_desc->ind &= ~ISERT_PROTECTED;
9e961ae7
SG		 1753 }
1754
b8d26b3b 1755 iscsit_stop_dataout_timer(cmd);
d40945d8 1756 device->unreg_rdma_mem(isert_cmd, isert_conn);
e3d7e4c3 1757 cmd->write_data_done = wr->data.len;
b6b87a1d 1758 wr->send_wr_num = 0;
b8d26b3b 1759
90ecc6e2 1760 pr_debug("Cmd: %p RDMA_READ comp calling execute_cmd\n", isert_cmd);
b8d26b3b
NB		 1761 spin_lock_bh(&cmd->istate_lock);
1762 cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT;
1763 cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT;
1764 spin_unlock_bh(&cmd->istate_lock);
1765
5bac4b1a
SG		 1766 if (ret)
1767 transport_send_check_condition_and_sense(se_cmd,
1768 se_cmd->pi_err, 0);
1769 else
1770 target_execute_cmd(se_cmd);
b8d26b3b
NB		 1771}
1772
1773static void
1774isert_do_control_comp(struct work_struct *work)
1775{
1776 struct isert_cmd *isert_cmd = container_of(work,
1777 struct isert_cmd, comp_work);
1778 struct isert_conn *isert_conn = isert_cmd->conn;
1779 struct ib_device *ib_dev = isert_conn->conn_cm_id->device;
d703ce2f 1780 struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd;
b8d26b3b
NB		 1781
1782 switch (cmd->i_state) {
1783 case ISTATE_SEND_TASKMGTRSP:
1784 pr_debug("Calling iscsit_tmr_post_handler >>>>>>>>>>>>>>>>>\n");
1785
1786 atomic_dec(&isert_conn->post_send_buf_count);
1787 iscsit_tmr_post_handler(cmd, cmd->conn);
1788
1789 cmd->i_state = ISTATE_SENT_STATUS;
1790 isert_completion_put(&isert_cmd->tx_desc, isert_cmd, ib_dev);
1791 break;
1792 case ISTATE_SEND_REJECT:
1793 pr_debug("Got isert_do_control_comp ISTATE_SEND_REJECT: >>>\n");
1794 atomic_dec(&isert_conn->post_send_buf_count);
1795
1796 cmd->i_state = ISTATE_SENT_STATUS;
b8d26b3b 1797 isert_completion_put(&isert_cmd->tx_desc, isert_cmd, ib_dev);
3df8f68a 1798 break;
b8d26b3b
NB		 1799 case ISTATE_SEND_LOGOUTRSP:
1800 pr_debug("Calling iscsit_logout_post_handler >>>>>>>>>>>>>>\n");
1801 /*
1802 * Call atomic_dec(&isert_conn->post_send_buf_count)
defd8848 1803 * from isert_wait_conn()
b8d26b3b
NB		 1804 */
1805 isert_conn->logout_posted = true;
1806 iscsit_logout_post_handler(cmd, cmd->conn);
1807 break;
adb54c29
NB		 1808 case ISTATE_SEND_TEXTRSP:
1809 atomic_dec(&isert_conn->post_send_buf_count);
1810 cmd->i_state = ISTATE_SENT_STATUS;
1811 isert_completion_put(&isert_cmd->tx_desc, isert_cmd, ib_dev);
1812 break;
b8d26b3b
NB		 1813 default:
1814 pr_err("Unknown do_control_comp i_state %d\n", cmd->i_state);
1815 dump_stack();
1816 break;
1817 }
1818}
1819
1820static void
1821isert_response_completion(struct iser_tx_desc *tx_desc,
1822 struct isert_cmd *isert_cmd,
1823 struct isert_conn *isert_conn,
1824 struct ib_device *ib_dev)
1825{
d703ce2f 1826 struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd;
b6b87a1d 1827 struct isert_rdma_wr *wr = &isert_cmd->rdma_wr;
b8d26b3b
NB		 1828
1829 if (cmd->i_state == ISTATE_SEND_TASKMGTRSP ||
3df8f68a 1830 cmd->i_state == ISTATE_SEND_LOGOUTRSP ||
adb54c29
NB		 1831 cmd->i_state == ISTATE_SEND_REJECT ||
1832 cmd->i_state == ISTATE_SEND_TEXTRSP) {
b8d26b3b
NB		 1833 isert_unmap_tx_desc(tx_desc, ib_dev);
1834
1835 INIT_WORK(&isert_cmd->comp_work, isert_do_control_comp);
1836 queue_work(isert_comp_wq, &isert_cmd->comp_work);
1837 return;
1838 }
897bb2c9
SG		 1839
1840 /**
1841 * If send_wr_num is 0 this means that we got
1842 * RDMA completion and we cleared it and we should
1843 * simply decrement the response post. else the
1844 * response is incorporated in send_wr_num, just
1845 * sub it.
1846 **/
1847 if (wr->send_wr_num)
1848 atomic_sub(wr->send_wr_num, &isert_conn->post_send_buf_count);
1849 else
1850 atomic_dec(&isert_conn->post_send_buf_count);
b8d26b3b
NB		 1851
1852 cmd->i_state = ISTATE_SENT_STATUS;
1853 isert_completion_put(tx_desc, isert_cmd, ib_dev);
1854}
1855
1856static void
95b60f07
NB		 1857__isert_send_completion(struct iser_tx_desc *tx_desc,
1858 struct isert_conn *isert_conn)
b8d26b3b
NB		 1859{
1860 struct ib_device *ib_dev = isert_conn->conn_cm_id->device;
1861 struct isert_cmd *isert_cmd = tx_desc->isert_cmd;
1862 struct isert_rdma_wr *wr;
1863
1864 if (!isert_cmd) {
1865 atomic_dec(&isert_conn->post_send_buf_count);
1866 isert_unmap_tx_desc(tx_desc, ib_dev);
1867 return;
1868 }
1869 wr = &isert_cmd->rdma_wr;
1870
1871 switch (wr->iser_ib_op) {
1872 case ISER_IB_RECV:
1873 pr_err("isert_send_completion: Got ISER_IB_RECV\n");
1874 dump_stack();
1875 break;
1876 case ISER_IB_SEND:
1877 pr_debug("isert_send_completion: Got ISER_IB_SEND\n");
1878 isert_response_completion(tx_desc, isert_cmd,
1879 isert_conn, ib_dev);
1880 break;
1881 case ISER_IB_RDMA_WRITE:
f93f3a70 1882 pr_debug("isert_send_completion: Got ISER_IB_RDMA_WRITE\n");
897bb2c9 1883 atomic_sub(wr->send_wr_num, &isert_conn->post_send_buf_count);
f93f3a70 1884 isert_completion_rdma_write(tx_desc, isert_cmd);
b8d26b3b
NB		 1885 break;
1886 case ISER_IB_RDMA_READ:
1887 pr_debug("isert_send_completion: Got ISER_IB_RDMA_READ:\n");
1888
b6b87a1d 1889 atomic_sub(wr->send_wr_num, &isert_conn->post_send_buf_count);
b8d26b3b
NB		 1890 isert_completion_rdma_read(tx_desc, isert_cmd);
1891 break;
1892 default:
1893 pr_err("Unknown wr->iser_ib_op: 0x%02x\n", wr->iser_ib_op);
1894 dump_stack();
1895 break;
1896 }
1897}
1898
95b60f07
NB		 1899static void
1900isert_send_completion(struct iser_tx_desc *tx_desc,
1901 struct isert_conn *isert_conn)
1902{
1903 struct llist_node *llnode = tx_desc->comp_llnode_batch;
1904 struct iser_tx_desc *t;
1905 /*
1906 * Drain coalesced completion llist starting from comp_llnode_batch
1907 * setup in isert_init_send_wr(), and then complete trailing tx_desc.
1908 */
1909 while (llnode) {
1910 t = llist_entry(llnode, struct iser_tx_desc, comp_llnode);
1911 llnode = llist_next(llnode);
1912 __isert_send_completion(t, isert_conn);
1913 }
1914 __isert_send_completion(tx_desc, isert_conn);
1915}
1916
ebbe4421
NB		 1917static void
1918isert_cq_drain_comp_llist(struct isert_conn *isert_conn, struct ib_device *ib_dev)
1919{
1920 struct llist_node *llnode;
1921 struct isert_rdma_wr *wr;
1922 struct iser_tx_desc *t;
1923
1924 mutex_lock(&isert_conn->conn_mutex);
1925 llnode = llist_del_all(&isert_conn->conn_comp_llist);
1926 isert_conn->conn_comp_batch = 0;
1927 mutex_unlock(&isert_conn->conn_mutex);
1928
1929 while (llnode) {
1930 t = llist_entry(llnode, struct iser_tx_desc, comp_llnode);
1931 llnode = llist_next(llnode);
1932 wr = &t->isert_cmd->rdma_wr;
1933
897bb2c9
SG		 1934 /**
1935 * If send_wr_num is 0 this means that we got
1936 * RDMA completion and we cleared it and we should
1937 * simply decrement the response post. else the
1938 * response is incorporated in send_wr_num, just
1939 * sub it.
1940 **/
1941 if (wr->send_wr_num)
1942 atomic_sub(wr->send_wr_num,
1943 &isert_conn->post_send_buf_count);
1944 else
1945 atomic_dec(&isert_conn->post_send_buf_count);
ebbe4421
NB		 1946 isert_completion_put(t, t->isert_cmd, ib_dev);
1947 }
1948}
1949
b8d26b3b 1950static void
defd8848 1951isert_cq_tx_comp_err(struct iser_tx_desc *tx_desc, struct isert_conn *isert_conn)
b8d26b3b
NB		 1952{
1953 struct ib_device *ib_dev = isert_conn->conn_cm_id->device;
defd8848 1954 struct isert_cmd *isert_cmd = tx_desc->isert_cmd;
ebbe4421
NB		 1955 struct llist_node *llnode = tx_desc->comp_llnode_batch;
1956 struct isert_rdma_wr *wr;
1957 struct iser_tx_desc *t;
1958
1959 while (llnode) {
1960 t = llist_entry(llnode, struct iser_tx_desc, comp_llnode);
1961 llnode = llist_next(llnode);
1962 wr = &t->isert_cmd->rdma_wr;
1963
897bb2c9
SG		 1964 /**
1965 * If send_wr_num is 0 this means that we got
1966 * RDMA completion and we cleared it and we should
1967 * simply decrement the response post. else the
1968 * response is incorporated in send_wr_num, just
1969 * sub it.
1970 **/
1971 if (wr->send_wr_num)
1972 atomic_sub(wr->send_wr_num,
1973 &isert_conn->post_send_buf_count);
1974 else
1975 atomic_dec(&isert_conn->post_send_buf_count);
ebbe4421
NB		 1976 isert_completion_put(t, t->isert_cmd, ib_dev);
1977 }
1978 tx_desc->comp_llnode_batch = NULL;
defd8848
NB		 1979
1980 if (!isert_cmd)
1981 isert_unmap_tx_desc(tx_desc, ib_dev);
1982 else
1983 isert_completion_put(tx_desc, isert_cmd, ib_dev);
1984}
1985
1986static void
1987isert_cq_rx_comp_err(struct isert_conn *isert_conn)
1988{
1989 struct ib_device *ib_dev = isert_conn->conn_cm_id->device;
1990 struct iscsi_conn *conn = isert_conn->conn;
b8d26b3b 1991
defd8848
NB		 1992 if (isert_conn->post_recv_buf_count)
1993 return;
b8d26b3b 1994
ebbe4421
NB		 1995 isert_cq_drain_comp_llist(isert_conn, ib_dev);
1996
defd8848
NB		 1997 if (conn->sess) {
1998 target_sess_cmd_list_set_waiting(conn->sess->se_sess);
1999 target_wait_for_sess_cmds(conn->sess->se_sess);
b8d26b3b
NB		 2000 }
2001
defd8848
NB		 2002 while (atomic_read(&isert_conn->post_send_buf_count))
2003 msleep(3000);
b8d26b3b 2004
defd8848
NB		 2005 mutex_lock(&isert_conn->conn_mutex);
2006 isert_conn->state = ISER_CONN_DOWN;
2007 mutex_unlock(&isert_conn->conn_mutex);
b2cb9649 2008
defd8848 2009 complete(&isert_conn->conn_wait_comp_err);
b8d26b3b
NB		 2010}
2011
2012static void
2013isert_cq_tx_work(struct work_struct *work)
2014{
2015 struct isert_cq_desc *cq_desc = container_of(work,
2016 struct isert_cq_desc, cq_tx_work);
2017 struct isert_device *device = cq_desc->device;
2018 int cq_index = cq_desc->cq_index;
2019 struct ib_cq *tx_cq = device->dev_tx_cq[cq_index];
2020 struct isert_conn *isert_conn;
2021 struct iser_tx_desc *tx_desc;
2022 struct ib_wc wc;
2023
2024 while (ib_poll_cq(tx_cq, 1, &wc) == 1) {
2025 tx_desc = (struct iser_tx_desc *)(unsigned long)wc.wr_id;
2026 isert_conn = wc.qp->qp_context;
2027
2028 if (wc.status == IB_WC_SUCCESS) {
2029 isert_send_completion(tx_desc, isert_conn);
2030 } else {
2031 pr_debug("TX wc.status != IB_WC_SUCCESS >>>>>>>>>>>>>>\n");
2032 pr_debug("TX wc.status: 0x%08x\n", wc.status);
c5a2adbf 2033 pr_debug("TX wc.vendor_err: 0x%08x\n", wc.vendor_err);
defd8848 2034
9bb4ca68 2035 if (wc.wr_id != ISER_FASTREG_LI_WRID) {
ebbe4421
NB		 2036 if (tx_desc->llnode_active)
2037 continue;
2038
9bb4ca68
NB		 2039 atomic_dec(&isert_conn->post_send_buf_count);
2040 isert_cq_tx_comp_err(tx_desc, isert_conn);
2041 }
b8d26b3b
NB		 2042 }
2043 }
2044
2045 ib_req_notify_cq(tx_cq, IB_CQ_NEXT_COMP);
2046}
2047
2048static void
2049isert_cq_tx_callback(struct ib_cq *cq, void *context)
2050{
2051 struct isert_cq_desc *cq_desc = (struct isert_cq_desc *)context;
2052
b8d26b3b
NB		 2053 queue_work(isert_comp_wq, &cq_desc->cq_tx_work);
2054}
2055
2056static void
2057isert_cq_rx_work(struct work_struct *work)
2058{
2059 struct isert_cq_desc *cq_desc = container_of(work,
2060 struct isert_cq_desc, cq_rx_work);
2061 struct isert_device *device = cq_desc->device;
2062 int cq_index = cq_desc->cq_index;
2063 struct ib_cq *rx_cq = device->dev_rx_cq[cq_index];
2064 struct isert_conn *isert_conn;
2065 struct iser_rx_desc *rx_desc;
2066 struct ib_wc wc;
2067 unsigned long xfer_len;
2068
2069 while (ib_poll_cq(rx_cq, 1, &wc) == 1) {
2070 rx_desc = (struct iser_rx_desc *)(unsigned long)wc.wr_id;
2071 isert_conn = wc.qp->qp_context;
2072
2073 if (wc.status == IB_WC_SUCCESS) {
2074 xfer_len = (unsigned long)wc.byte_len;
2075 isert_rx_completion(rx_desc, isert_conn, xfer_len);
2076 } else {
2077 pr_debug("RX wc.status != IB_WC_SUCCESS >>>>>>>>>>>>>>\n");
c5a2adbf 2078 if (wc.status != IB_WC_WR_FLUSH_ERR) {
b8d26b3b 2079 pr_debug("RX wc.status: 0x%08x\n", wc.status);
c5a2adbf
NB		 2080 pr_debug("RX wc.vendor_err: 0x%08x\n",
2081 wc.vendor_err);
2082 }
b8d26b3b 2083 isert_conn->post_recv_buf_count--;
defd8848 2084 isert_cq_rx_comp_err(isert_conn);
b8d26b3b
NB		 2085 }
2086 }
2087
2088 ib_req_notify_cq(rx_cq, IB_CQ_NEXT_COMP);
2089}
2090
2091static void
2092isert_cq_rx_callback(struct ib_cq *cq, void *context)
2093{
2094 struct isert_cq_desc *cq_desc = (struct isert_cq_desc *)context;
2095
b8d26b3b
NB		 2096 queue_work(isert_rx_wq, &cq_desc->cq_rx_work);
2097}
2098
2099static int
2100isert_post_response(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd)
2101{
2102 struct ib_send_wr *wr_failed;
2103 int ret;
2104
2105 atomic_inc(&isert_conn->post_send_buf_count);
2106
2107 ret = ib_post_send(isert_conn->conn_qp, &isert_cmd->tx_desc.send_wr,
2108 &wr_failed);
2109 if (ret) {
2110 pr_err("ib_post_send failed with %d\n", ret);
2111 atomic_dec(&isert_conn->post_send_buf_count);
2112 return ret;
2113 }
2114 return ret;
2115}
2116
2117static int
2118isert_put_response(struct iscsi_conn *conn, struct iscsi_cmd *cmd)
2119{
d703ce2f 2120 struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd);
b8d26b3b
NB		 2121 struct isert_conn *isert_conn = (struct isert_conn *)conn->context;
2122 struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr;
2123 struct iscsi_scsi_rsp *hdr = (struct iscsi_scsi_rsp *)
2124 &isert_cmd->tx_desc.iscsi_header;
2125
2126 isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc);
2127 iscsit_build_rsp_pdu(cmd, conn, true, hdr);
2128 isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc);
2129 /*
2130 * Attach SENSE DATA payload to iSCSI Response PDU
2131 */
2132 if (cmd->se_cmd.sense_buffer &&
2133 ((cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) ||
2134 (cmd->se_cmd.se_cmd_flags & SCF_EMULATED_TASK_SENSE))) {
2135 struct ib_device *ib_dev = isert_conn->conn_cm_id->device;
2136 struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1];
dbbc5d11 2137 u32 padding, pdu_len;
b8d26b3b
NB		 2138
2139 put_unaligned_be16(cmd->se_cmd.scsi_sense_length,
2140 cmd->sense_buffer);
2141 cmd->se_cmd.scsi_sense_length += sizeof(__be16);
2142
2143 padding = -(cmd->se_cmd.scsi_sense_length) & 3;
2144 hton24(hdr->dlength, (u32)cmd->se_cmd.scsi_sense_length);
dbbc5d11 2145 pdu_len = cmd->se_cmd.scsi_sense_length + padding;
b8d26b3b 2146
dbbc5d11
NB		 2147 isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev,
2148 (void *)cmd->sense_buffer, pdu_len,
b8d26b3b
NB		 2149 DMA_TO_DEVICE);
2150
dbbc5d11
NB		 2151 isert_cmd->pdu_buf_len = pdu_len;
2152 tx_dsg->addr = isert_cmd->pdu_buf_dma;
2153 tx_dsg->length = pdu_len;
b8d26b3b
NB		 2154 tx_dsg->lkey = isert_conn->conn_mr->lkey;
2155 isert_cmd->tx_desc.num_sge = 2;
2156 }
2157
95b60f07 2158 isert_init_send_wr(isert_conn, isert_cmd, send_wr, true);
b8d26b3b
NB		 2159
2160 pr_debug("Posting SCSI Response IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n");
2161
2162 return isert_post_response(isert_conn, isert_cmd);
2163}
2164
131e6abc
NB		 2165static void
2166isert_aborted_task(struct iscsi_conn *conn, struct iscsi_cmd *cmd)
2167{
2168 struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd);
2169 struct isert_conn *isert_conn = (struct isert_conn *)conn->context;
2170 struct isert_device *device = isert_conn->conn_device;
2171
2172 spin_lock_bh(&conn->cmd_lock);
2173 if (!list_empty(&cmd->i_conn_node))
2174 list_del_init(&cmd->i_conn_node);
2175 spin_unlock_bh(&conn->cmd_lock);
2176
2177 if (cmd->data_direction == DMA_TO_DEVICE)
2178 iscsit_stop_dataout_timer(cmd);
2179
2180 device->unreg_rdma_mem(isert_cmd, isert_conn);
2181}
2182
b8d26b3b
NB		 2183static int
2184isert_put_nopin(struct iscsi_cmd *cmd, struct iscsi_conn *conn,
2185 bool nopout_response)
2186{
d703ce2f 2187 struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd);
b8d26b3b
NB		 2188 struct isert_conn *isert_conn = (struct isert_conn *)conn->context;
2189 struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr;
2190
2191 isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc);
2192 iscsit_build_nopin_rsp(cmd, conn, (struct iscsi_nopin *)
2193 &isert_cmd->tx_desc.iscsi_header,
2194 nopout_response);
2195 isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc);
95b60f07 2196 isert_init_send_wr(isert_conn, isert_cmd, send_wr, false);
b8d26b3b 2197
8b513d0c 2198 pr_debug("Posting NOPIN Response IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n");
b8d26b3b
NB		 2199
2200 return isert_post_response(isert_conn, isert_cmd);
2201}
2202
2203static int
2204isert_put_logout_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
2205{
d703ce2f 2206 struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd);
b8d26b3b
NB		 2207 struct isert_conn *isert_conn = (struct isert_conn *)conn->context;
2208 struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr;
2209
2210 isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc);
2211 iscsit_build_logout_rsp(cmd, conn, (struct iscsi_logout_rsp *)
2212 &isert_cmd->tx_desc.iscsi_header);
2213 isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc);
95b60f07 2214 isert_init_send_wr(isert_conn, isert_cmd, send_wr, false);
b8d26b3b
NB		 2215
2216 pr_debug("Posting Logout Response IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n");
2217
2218 return isert_post_response(isert_conn, isert_cmd);
2219}
2220
2221static int
2222isert_put_tm_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
2223{
d703ce2f 2224 struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd);
b8d26b3b
NB		 2225 struct isert_conn *isert_conn = (struct isert_conn *)conn->context;
2226 struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr;
2227
2228 isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc);
2229 iscsit_build_task_mgt_rsp(cmd, conn, (struct iscsi_tm_rsp *)
2230 &isert_cmd->tx_desc.iscsi_header);
2231 isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc);
95b60f07 2232 isert_init_send_wr(isert_conn, isert_cmd, send_wr, false);
b8d26b3b
NB		 2233
2234 pr_debug("Posting Task Management Response IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n");
2235
2236 return isert_post_response(isert_conn, isert_cmd);
2237}
2238
2239static int
2240isert_put_reject(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
2241{
d703ce2f 2242 struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd);
b8d26b3b
NB		 2243 struct isert_conn *isert_conn = (struct isert_conn *)conn->context;
2244 struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr;
3df8f68a
NB		 2245 struct ib_device *ib_dev = isert_conn->conn_cm_id->device;
2246 struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1];
2247 struct iscsi_reject *hdr =
2248 (struct iscsi_reject *)&isert_cmd->tx_desc.iscsi_header;
b8d26b3b
NB		 2249
2250 isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc);
3df8f68a 2251 iscsit_build_reject(cmd, conn, hdr);
b8d26b3b 2252 isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc);
3df8f68a
NB		 2253
2254 hton24(hdr->dlength, ISCSI_HDR_LEN);
dbbc5d11 2255 isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev,
3df8f68a
NB		 2256 (void *)cmd->buf_ptr, ISCSI_HDR_LEN,
2257 DMA_TO_DEVICE);
dbbc5d11
NB		 2258 isert_cmd->pdu_buf_len = ISCSI_HDR_LEN;
2259 tx_dsg->addr = isert_cmd->pdu_buf_dma;
3df8f68a
NB		 2260 tx_dsg->length = ISCSI_HDR_LEN;
2261 tx_dsg->lkey = isert_conn->conn_mr->lkey;
2262 isert_cmd->tx_desc.num_sge = 2;
2263
95b60f07 2264 isert_init_send_wr(isert_conn, isert_cmd, send_wr, false);
b8d26b3b
NB		 2265
2266 pr_debug("Posting Reject IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n");
2267
2268 return isert_post_response(isert_conn, isert_cmd);
2269}
2270
adb54c29
NB		 2271static int
2272isert_put_text_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
2273{
d703ce2f 2274 struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd);
adb54c29
NB		 2275 struct isert_conn *isert_conn = (struct isert_conn *)conn->context;
2276 struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr;
2277 struct iscsi_text_rsp *hdr =
2278 (struct iscsi_text_rsp *)&isert_cmd->tx_desc.iscsi_header;
2279 u32 txt_rsp_len;
2280 int rc;
2281
2282 isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc);
2283 rc = iscsit_build_text_rsp(cmd, conn, hdr);
2284 if (rc < 0)
2285 return rc;
2286
2287 txt_rsp_len = rc;
2288 isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc);
2289
2290 if (txt_rsp_len) {
2291 struct ib_device *ib_dev = isert_conn->conn_cm_id->device;
2292 struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1];
2293 void *txt_rsp_buf = cmd->buf_ptr;
2294
2295 isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev,
2296 txt_rsp_buf, txt_rsp_len, DMA_TO_DEVICE);
2297
2298 isert_cmd->pdu_buf_len = txt_rsp_len;
2299 tx_dsg->addr = isert_cmd->pdu_buf_dma;
2300 tx_dsg->length = txt_rsp_len;
2301 tx_dsg->lkey = isert_conn->conn_mr->lkey;
2302 isert_cmd->tx_desc.num_sge = 2;
2303 }
95b60f07 2304 isert_init_send_wr(isert_conn, isert_cmd, send_wr, false);
adb54c29
NB		 2305
2306 pr_debug("Posting Text Response IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n");
2307
2308 return isert_post_response(isert_conn, isert_cmd);
2309}
2310
b8d26b3b
NB		 2311static int
2312isert_build_rdma_wr(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd,
2313 struct ib_sge *ib_sge, struct ib_send_wr *send_wr,
2314 u32 data_left, u32 offset)
2315{
d703ce2f 2316 struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd;
b8d26b3b
NB		 2317 struct scatterlist *sg_start, *tmp_sg;
2318 struct ib_device *ib_dev = isert_conn->conn_cm_id->device;
2319 u32 sg_off, page_off;
2320 int i = 0, sg_nents;
2321
2322 sg_off = offset / PAGE_SIZE;
2323 sg_start = &cmd->se_cmd.t_data_sg[sg_off];
2324 sg_nents = min(cmd->se_cmd.t_data_nents - sg_off, isert_conn->max_sge);
2325 page_off = offset % PAGE_SIZE;
2326
2327 send_wr->sg_list = ib_sge;
2328 send_wr->num_sge = sg_nents;
2329 send_wr->wr_id = (unsigned long)&isert_cmd->tx_desc;
2330 /*
2331 * Perform mapping of TCM scatterlist memory ib_sge dma_addr.
2332 */
2333 for_each_sg(sg_start, tmp_sg, sg_nents, i) {
2334 pr_debug("ISER RDMA from SGL dma_addr: 0x%16llx dma_len: %u, page_off: %u\n",
2335 (unsigned long long)tmp_sg->dma_address,
2336 tmp_sg->length, page_off);
2337
2338 ib_sge->addr = ib_sg_dma_address(ib_dev, tmp_sg) + page_off;
2339 ib_sge->length = min_t(u32, data_left,
2340 ib_sg_dma_len(ib_dev, tmp_sg) - page_off);
2341 ib_sge->lkey = isert_conn->conn_mr->lkey;
2342
90ecc6e2
VP		 2343 pr_debug("RDMA ib_sge: addr: 0x%16llx length: %u lkey: %08x\n",
2344 ib_sge->addr, ib_sge->length, ib_sge->lkey);
b8d26b3b
NB		 2345 page_off = 0;
2346 data_left -= ib_sge->length;
2347 ib_sge++;
2348 pr_debug("Incrementing ib_sge pointer to %p\n", ib_sge);
2349 }
2350
2351 pr_debug("Set outgoing sg_list: %p num_sg: %u from TCM SGLs\n",
2352 send_wr->sg_list, send_wr->num_sge);
2353
2354 return sg_nents;
2355}
2356
2357static int
90ecc6e2
VP		 2358isert_map_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
2359 struct isert_rdma_wr *wr)
b8d26b3b
NB		 2360{
2361 struct se_cmd *se_cmd = &cmd->se_cmd;
d703ce2f 2362 struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd);
b8d26b3b 2363 struct isert_conn *isert_conn = (struct isert_conn *)conn->context;
e3d7e4c3 2364 struct isert_data_buf *data = &wr->data;
90ecc6e2 2365 struct ib_send_wr *send_wr;
b8d26b3b 2366 struct ib_sge *ib_sge;
e3d7e4c3
SG		 2367 u32 offset, data_len, data_left, rdma_write_max, va_offset = 0;
2368 int ret = 0, i, ib_sge_cnt;
90ecc6e2 2369
e3d7e4c3 2370 isert_cmd->tx_desc.isert_cmd = isert_cmd;
b8d26b3b 2371
e3d7e4c3
SG		 2372 offset = wr->iser_ib_op == ISER_IB_RDMA_READ ? cmd->write_data_done : 0;
2373 ret = isert_map_data_buf(isert_conn, isert_cmd, se_cmd->t_data_sg,
2374 se_cmd->t_data_nents, se_cmd->data_length,
2375 offset, wr->iser_ib_op, &wr->data);
2376 if (ret)
2377 return ret;
b8d26b3b 2378
e3d7e4c3
SG		 2379 data_left = data->len;
2380 offset = data->offset;
b8d26b3b 2381
e3d7e4c3 2382 ib_sge = kzalloc(sizeof(struct ib_sge) * data->nents, GFP_KERNEL);
b8d26b3b 2383 if (!ib_sge) {
90ecc6e2 2384 pr_warn("Unable to allocate ib_sge\n");
b8d26b3b 2385 ret = -ENOMEM;
e3d7e4c3 2386 goto unmap_cmd;
b8d26b3b 2387 }
90ecc6e2 2388 wr->ib_sge = ib_sge;
b8d26b3b 2389
e3d7e4c3 2390 wr->send_wr_num = DIV_ROUND_UP(data->nents, isert_conn->max_sge);
b8d26b3b
NB		 2391 wr->send_wr = kzalloc(sizeof(struct ib_send_wr) * wr->send_wr_num,
2392 GFP_KERNEL);
2393 if (!wr->send_wr) {
90ecc6e2 2394 pr_debug("Unable to allocate wr->send_wr\n");
b8d26b3b 2395 ret = -ENOMEM;
e3d7e4c3 2396 goto unmap_cmd;
b8d26b3b 2397 }
b8d26b3b
NB		 2398
2399 wr->isert_cmd = isert_cmd;
2400 rdma_write_max = isert_conn->max_sge * PAGE_SIZE;
b8d26b3b
NB		 2401
2402 for (i = 0; i < wr->send_wr_num; i++) {
2403 send_wr = &isert_cmd->rdma_wr.send_wr[i];
2404 data_len = min(data_left, rdma_write_max);
2405
b8d26b3b 2406 send_wr->send_flags = 0;
90ecc6e2
VP		 2407 if (wr->iser_ib_op == ISER_IB_RDMA_WRITE) {
2408 send_wr->opcode = IB_WR_RDMA_WRITE;
2409 send_wr->wr.rdma.remote_addr = isert_cmd->read_va + offset;
2410 send_wr->wr.rdma.rkey = isert_cmd->read_stag;
2411 if (i + 1 == wr->send_wr_num)
2412 send_wr->next = &isert_cmd->tx_desc.send_wr;
2413 else
2414 send_wr->next = &wr->send_wr[i + 1];
2415 } else {
2416 send_wr->opcode = IB_WR_RDMA_READ;
2417 send_wr->wr.rdma.remote_addr = isert_cmd->write_va + va_offset;
2418 send_wr->wr.rdma.rkey = isert_cmd->write_stag;
2419 if (i + 1 == wr->send_wr_num)
2420 send_wr->send_flags = IB_SEND_SIGNALED;
2421 else
2422 send_wr->next = &wr->send_wr[i + 1];
2423 }
b8d26b3b
NB		 2424
2425 ib_sge_cnt = isert_build_rdma_wr(isert_conn, isert_cmd, ib_sge,
2426 send_wr, data_len, offset);
2427 ib_sge += ib_sge_cnt;
2428
b8d26b3b 2429 offset += data_len;
90ecc6e2 2430 va_offset += data_len;
b8d26b3b
NB		 2431 data_left -= data_len;
2432 }
90ecc6e2
VP		 2433
2434 return 0;
e3d7e4c3
SG		 2435unmap_cmd:
2436 isert_unmap_data_buf(isert_conn, data);
2437
90ecc6e2
VP		 2438 return ret;
2439}
2440
59464ef4
VP		 2441static int
2442isert_map_fr_pagelist(struct ib_device *ib_dev,
2443 struct scatterlist *sg_start, int sg_nents, u64 *fr_pl)
2444{
2445 u64 start_addr, end_addr, page, chunk_start = 0;
2446 struct scatterlist *tmp_sg;
2447 int i = 0, new_chunk, last_ent, n_pages;
2448
2449 n_pages = 0;
2450 new_chunk = 1;
2451 last_ent = sg_nents - 1;
2452 for_each_sg(sg_start, tmp_sg, sg_nents, i) {
2453 start_addr = ib_sg_dma_address(ib_dev, tmp_sg);
2454 if (new_chunk)
2455 chunk_start = start_addr;
2456 end_addr = start_addr + ib_sg_dma_len(ib_dev, tmp_sg);
2457
2458 pr_debug("SGL[%d] dma_addr: 0x%16llx len: %u\n",
2459 i, (unsigned long long)tmp_sg->dma_address,
2460 tmp_sg->length);
2461
2462 if ((end_addr & ~PAGE_MASK) && i < last_ent) {
2463 new_chunk = 0;
2464 continue;
2465 }
2466 new_chunk = 1;
2467
2468 page = chunk_start & PAGE_MASK;
2469 do {
2470 fr_pl[n_pages++] = page;
2471 pr_debug("Mapped page_list[%d] page_addr: 0x%16llx\n",
2472 n_pages - 1, page);
2473 page += PAGE_SIZE;
2474 } while (page < end_addr);
2475 }
2476
2477 return n_pages;
2478}
2479
2480static int
e3d7e4c3
SG		 2481isert_fast_reg_mr(struct isert_conn *isert_conn,
2482 struct fast_reg_descriptor *fr_desc,
2483 struct isert_data_buf *mem,
9e961ae7 2484 enum isert_indicator ind,
e3d7e4c3 2485 struct ib_sge *sge)
59464ef4 2486{
59464ef4 2487 struct ib_device *ib_dev = isert_conn->conn_cm_id->device;
9e961ae7
SG		 2488 struct ib_mr *mr;
2489 struct ib_fast_reg_page_list *frpl;
59464ef4
VP		 2490 struct ib_send_wr fr_wr, inv_wr;
2491 struct ib_send_wr *bad_wr, *wr = NULL;
9bd626e7
SG		 2492 int ret, pagelist_len;
2493 u32 page_off;
59464ef4 2494 u8 key;
59464ef4 2495
e3d7e4c3
SG		 2496 if (mem->dma_nents == 1) {
2497 sge->lkey = isert_conn->conn_mr->lkey;
2498 sge->addr = ib_sg_dma_address(ib_dev, &mem->sg[0]);
2499 sge->length = ib_sg_dma_len(ib_dev, &mem->sg[0]);
9e961ae7
SG		 2500 pr_debug("%s:%d sge: addr: 0x%llx length: %u lkey: %x\n",
2501 __func__, __LINE__, sge->addr, sge->length,
2502 sge->lkey);
e3d7e4c3
SG		 2503 return 0;
2504 }
2505
9e961ae7
SG		 2506 if (ind == ISERT_DATA_KEY_VALID) {
2507 /* Registering data buffer */
2508 mr = fr_desc->data_mr;
2509 frpl = fr_desc->data_frpl;
2510 } else {
2511 /* Registering protection buffer */
2512 mr = fr_desc->pi_ctx->prot_mr;
2513 frpl = fr_desc->pi_ctx->prot_frpl;
2514 }
2515
e3d7e4c3 2516 page_off = mem->offset % PAGE_SIZE;
59464ef4 2517
9bd626e7 2518 pr_debug("Use fr_desc %p sg_nents %d offset %u\n",
e3d7e4c3 2519 fr_desc, mem->nents, mem->offset);
59464ef4 2520
e3d7e4c3 2521 pagelist_len = isert_map_fr_pagelist(ib_dev, mem->sg, mem->nents,
9e961ae7 2522 &frpl->page_list[0]);
59464ef4 2523
d3e125da 2524 if (!(fr_desc->ind & ISERT_DATA_KEY_VALID)) {
59464ef4 2525 memset(&inv_wr, 0, sizeof(inv_wr));
9bb4ca68 2526 inv_wr.wr_id = ISER_FASTREG_LI_WRID;
59464ef4 2527 inv_wr.opcode = IB_WR_LOCAL_INV;
9e961ae7 2528 inv_wr.ex.invalidate_rkey = mr->rkey;
59464ef4
VP		 2529 wr = &inv_wr;
2530 /* Bump the key */
9e961ae7
SG		 2531 key = (u8)(mr->rkey & 0x000000FF);
2532 ib_update_fast_reg_key(mr, ++key);
59464ef4
VP		 2533 }
2534
2535 /* Prepare FASTREG WR */
2536 memset(&fr_wr, 0, sizeof(fr_wr));
9bb4ca68 2537 fr_wr.wr_id = ISER_FASTREG_LI_WRID;
59464ef4 2538 fr_wr.opcode = IB_WR_FAST_REG_MR;
9e961ae7
SG		 2539 fr_wr.wr.fast_reg.iova_start = frpl->page_list[0] + page_off;
2540 fr_wr.wr.fast_reg.page_list = frpl;
59464ef4
VP		 2541 fr_wr.wr.fast_reg.page_list_len = pagelist_len;
2542 fr_wr.wr.fast_reg.page_shift = PAGE_SHIFT;
e3d7e4c3 2543 fr_wr.wr.fast_reg.length = mem->len;
9e961ae7 2544 fr_wr.wr.fast_reg.rkey = mr->rkey;
59464ef4
VP		 2545 fr_wr.wr.fast_reg.access_flags = IB_ACCESS_LOCAL_WRITE;
2546
2547 if (!wr)
2548 wr = &fr_wr;
2549 else
2550 wr->next = &fr_wr;
2551
2552 ret = ib_post_send(isert_conn->conn_qp, wr, &bad_wr);
2553 if (ret) {
2554 pr_err("fast registration failed, ret:%d\n", ret);
2555 return ret;
2556 }
9e961ae7 2557 fr_desc->ind &= ~ind;
59464ef4 2558
9e961ae7
SG		 2559 sge->lkey = mr->lkey;
2560 sge->addr = frpl->page_list[0] + page_off;
e3d7e4c3 2561 sge->length = mem->len;
59464ef4 2562
9e961ae7
SG		 2563 pr_debug("%s:%d sge: addr: 0x%llx length: %u lkey: %x\n",
2564 __func__, __LINE__, sge->addr, sge->length,
2565 sge->lkey);
2566
2567 return ret;
2568}
2569
2570static inline enum ib_t10_dif_type
2571se2ib_prot_type(enum target_prot_type prot_type)
2572{
2573 switch (prot_type) {
2574 case TARGET_DIF_TYPE0_PROT:
2575 return IB_T10DIF_NONE;
2576 case TARGET_DIF_TYPE1_PROT:
2577 return IB_T10DIF_TYPE1;
2578 case TARGET_DIF_TYPE2_PROT:
2579 return IB_T10DIF_TYPE2;
2580 case TARGET_DIF_TYPE3_PROT:
2581 return IB_T10DIF_TYPE3;
2582 default:
2583 return IB_T10DIF_NONE;
2584 }
2585}
2586
2587static int
2588isert_set_sig_attrs(struct se_cmd *se_cmd, struct ib_sig_attrs *sig_attrs)
2589{
2590 enum ib_t10_dif_type ib_prot_type = se2ib_prot_type(se_cmd->prot_type);
2591
2592 sig_attrs->mem.sig_type = IB_SIG_TYPE_T10_DIF;
2593 sig_attrs->wire.sig_type = IB_SIG_TYPE_T10_DIF;
2594 sig_attrs->mem.sig.dif.pi_interval =
2595 se_cmd->se_dev->dev_attrib.block_size;
2596 sig_attrs->wire.sig.dif.pi_interval =
2597 se_cmd->se_dev->dev_attrib.block_size;
2598
2599 switch (se_cmd->prot_op) {
2600 case TARGET_PROT_DIN_INSERT:
2601 case TARGET_PROT_DOUT_STRIP:
2602 sig_attrs->mem.sig.dif.type = IB_T10DIF_NONE;
2603 sig_attrs->wire.sig.dif.type = ib_prot_type;
2604 sig_attrs->wire.sig.dif.bg_type = IB_T10DIF_CRC;
2605 sig_attrs->wire.sig.dif.ref_tag = se_cmd->reftag_seed;
2606 break;
2607 case TARGET_PROT_DOUT_INSERT:
2608 case TARGET_PROT_DIN_STRIP:
2609 sig_attrs->mem.sig.dif.type = ib_prot_type;
2610 sig_attrs->mem.sig.dif.bg_type = IB_T10DIF_CRC;
2611 sig_attrs->mem.sig.dif.ref_tag = se_cmd->reftag_seed;
2612 sig_attrs->wire.sig.dif.type = IB_T10DIF_NONE;
2613 break;
2614 case TARGET_PROT_DIN_PASS:
2615 case TARGET_PROT_DOUT_PASS:
2616 sig_attrs->mem.sig.dif.type = ib_prot_type;
2617 sig_attrs->mem.sig.dif.bg_type = IB_T10DIF_CRC;
2618 sig_attrs->mem.sig.dif.ref_tag = se_cmd->reftag_seed;
2619 sig_attrs->wire.sig.dif.type = ib_prot_type;
2620 sig_attrs->wire.sig.dif.bg_type = IB_T10DIF_CRC;
2621 sig_attrs->wire.sig.dif.ref_tag = se_cmd->reftag_seed;
2622 break;
2623 default:
2624 pr_err("Unsupported PI operation %d\n", se_cmd->prot_op);
2625 return -EINVAL;
2626 }
2627
2628 return 0;
2629}
2630
2631static inline u8
2632isert_set_prot_checks(u8 prot_checks)
2633{
2634 return (prot_checks & TARGET_DIF_CHECK_GUARD ? 0xc0 : 0) |
2635 (prot_checks & TARGET_DIF_CHECK_REFTAG ? 0x30 : 0) |
2636 (prot_checks & TARGET_DIF_CHECK_REFTAG ? 0x0f : 0);
2637}
2638
2639static int
2640isert_reg_sig_mr(struct isert_conn *isert_conn, struct se_cmd *se_cmd,
2641 struct fast_reg_descriptor *fr_desc,
2642 struct ib_sge *data_sge, struct ib_sge *prot_sge,
2643 struct ib_sge *sig_sge)
2644{
2645 struct ib_send_wr sig_wr, inv_wr;
2646 struct ib_send_wr *bad_wr, *wr = NULL;
2647 struct pi_context *pi_ctx = fr_desc->pi_ctx;
2648 struct ib_sig_attrs sig_attrs;
2649 int ret;
2650 u32 key;
2651
2652 memset(&sig_attrs, 0, sizeof(sig_attrs));
2653 ret = isert_set_sig_attrs(se_cmd, &sig_attrs);
2654 if (ret)
2655 goto err;
59464ef4 2656
9e961ae7
SG		 2657 sig_attrs.check_mask = isert_set_prot_checks(se_cmd->prot_checks);
2658
2659 if (!(fr_desc->ind & ISERT_SIG_KEY_VALID)) {
2660 memset(&inv_wr, 0, sizeof(inv_wr));
2661 inv_wr.opcode = IB_WR_LOCAL_INV;
c2caa207 2662 inv_wr.wr_id = ISER_FASTREG_LI_WRID;
9e961ae7
SG		 2663 inv_wr.ex.invalidate_rkey = pi_ctx->sig_mr->rkey;
2664 wr = &inv_wr;
2665 /* Bump the key */
2666 key = (u8)(pi_ctx->sig_mr->rkey & 0x000000FF);
2667 ib_update_fast_reg_key(pi_ctx->sig_mr, ++key);
2668 }
2669
2670 memset(&sig_wr, 0, sizeof(sig_wr));
2671 sig_wr.opcode = IB_WR_REG_SIG_MR;
c2caa207 2672 sig_wr.wr_id = ISER_FASTREG_LI_WRID;
9e961ae7
SG		 2673 sig_wr.sg_list = data_sge;
2674 sig_wr.num_sge = 1;
2675 sig_wr.wr.sig_handover.access_flags = IB_ACCESS_LOCAL_WRITE;
2676 sig_wr.wr.sig_handover.sig_attrs = &sig_attrs;
2677 sig_wr.wr.sig_handover.sig_mr = pi_ctx->sig_mr;
2678 if (se_cmd->t_prot_sg)
2679 sig_wr.wr.sig_handover.prot = prot_sge;
2680
2681 if (!wr)
2682 wr = &sig_wr;
2683 else
2684 wr->next = &sig_wr;
2685
2686 ret = ib_post_send(isert_conn->conn_qp, wr, &bad_wr);
2687 if (ret) {
2688 pr_err("fast registration failed, ret:%d\n", ret);
2689 goto err;
2690 }
2691 fr_desc->ind &= ~ISERT_SIG_KEY_VALID;
2692
2693 sig_sge->lkey = pi_ctx->sig_mr->lkey;
2694 sig_sge->addr = 0;
2695 sig_sge->length = se_cmd->data_length;
2696 if (se_cmd->prot_op != TARGET_PROT_DIN_STRIP &&
2697 se_cmd->prot_op != TARGET_PROT_DOUT_INSERT)
2698 /*
2699 * We have protection guards on the wire
2700 * so we need to set a larget transfer
2701 */
2702 sig_sge->length += se_cmd->prot_length;
2703
2704 pr_debug("sig_sge: addr: 0x%llx length: %u lkey: %x\n",
2705 sig_sge->addr, sig_sge->length,
2706 sig_sge->lkey);
2707err:
59464ef4
VP		 2708 return ret;
2709}
2710
2711static int
a3a5a826
SG		 2712isert_reg_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
2713 struct isert_rdma_wr *wr)
59464ef4
VP		 2714{
2715 struct se_cmd *se_cmd = &cmd->se_cmd;
2716 struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd);
e3d7e4c3 2717 struct isert_conn *isert_conn = conn->context;
9e961ae7 2718 struct ib_sge data_sge;
59464ef4 2719 struct ib_send_wr *send_wr;
e3d7e4c3
SG		 2720 struct fast_reg_descriptor *fr_desc = NULL;
2721 u32 offset;
2722 int ret = 0;
59464ef4
VP		 2723 unsigned long flags;
2724
e3d7e4c3 2725 isert_cmd->tx_desc.isert_cmd = isert_cmd;
59464ef4 2726
e3d7e4c3
SG		 2727 offset = wr->iser_ib_op == ISER_IB_RDMA_READ ? cmd->write_data_done : 0;
2728 ret = isert_map_data_buf(isert_conn, isert_cmd, se_cmd->t_data_sg,
2729 se_cmd->t_data_nents, se_cmd->data_length,
2730 offset, wr->iser_ib_op, &wr->data);
2731 if (ret)
2732 return ret;
59464ef4 2733
9e961ae7
SG		 2734 if (wr->data.dma_nents != 1 ||
2735 se_cmd->prot_op != TARGET_PROT_NORMAL) {
e3d7e4c3
SG		 2736 spin_lock_irqsave(&isert_conn->conn_lock, flags);
2737 fr_desc = list_first_entry(&isert_conn->conn_fr_pool,
2738 struct fast_reg_descriptor, list);
2739 list_del(&fr_desc->list);
2740 spin_unlock_irqrestore(&isert_conn->conn_lock, flags);
2741 wr->fr_desc = fr_desc;
59464ef4 2742 }
59464ef4 2743
9e961ae7
SG		 2744 ret = isert_fast_reg_mr(isert_conn, fr_desc, &wr->data,
2745 ISERT_DATA_KEY_VALID, &data_sge);
e3d7e4c3
SG		 2746 if (ret)
2747 goto unmap_cmd;
59464ef4 2748
9e961ae7
SG		 2749 if (se_cmd->prot_op != TARGET_PROT_NORMAL) {
2750 struct ib_sge prot_sge, sig_sge;
2751
2752 if (se_cmd->t_prot_sg) {
2753 ret = isert_map_data_buf(isert_conn, isert_cmd,
2754 se_cmd->t_prot_sg,
2755 se_cmd->t_prot_nents,
2756 se_cmd->prot_length,
2757 0, wr->iser_ib_op, &wr->prot);
2758 if (ret)
2759 goto unmap_cmd;
2760
2761 ret = isert_fast_reg_mr(isert_conn, fr_desc, &wr->prot,
2762 ISERT_PROT_KEY_VALID, &prot_sge);
2763 if (ret)
2764 goto unmap_prot_cmd;
2765 }
2766
2767 ret = isert_reg_sig_mr(isert_conn, se_cmd, fr_desc,
2768 &data_sge, &prot_sge, &sig_sge);
2769 if (ret)
2770 goto unmap_prot_cmd;
2771
2772 fr_desc->ind |= ISERT_PROTECTED;
2773 memcpy(&wr->s_ib_sge, &sig_sge, sizeof(sig_sge));
2774 } else
2775 memcpy(&wr->s_ib_sge, &data_sge, sizeof(data_sge));
2776
e3d7e4c3 2777 wr->ib_sge = &wr->s_ib_sge;
59464ef4
VP		 2778 wr->send_wr_num = 1;
2779 memset(&wr->s_send_wr, 0, sizeof(*send_wr));
2780 wr->send_wr = &wr->s_send_wr;
59464ef4 2781 wr->isert_cmd = isert_cmd;
59464ef4
VP		 2782
2783 send_wr = &isert_cmd->rdma_wr.s_send_wr;
e3d7e4c3 2784 send_wr->sg_list = &wr->s_ib_sge;
59464ef4
VP		 2785 send_wr->num_sge = 1;
2786 send_wr->wr_id = (unsigned long)&isert_cmd->tx_desc;
2787 if (wr->iser_ib_op == ISER_IB_RDMA_WRITE) {
2788 send_wr->opcode = IB_WR_RDMA_WRITE;
2789 send_wr->wr.rdma.remote_addr = isert_cmd->read_va;
2790 send_wr->wr.rdma.rkey = isert_cmd->read_stag;
9e961ae7
SG		 2791 send_wr->send_flags = se_cmd->prot_op == TARGET_PROT_NORMAL ?
2792 0 : IB_SEND_SIGNALED;
59464ef4
VP		 2793 } else {
2794 send_wr->opcode = IB_WR_RDMA_READ;
2795 send_wr->wr.rdma.remote_addr = isert_cmd->write_va;
2796 send_wr->wr.rdma.rkey = isert_cmd->write_stag;
2797 send_wr->send_flags = IB_SEND_SIGNALED;
2798 }
2799
e3d7e4c3 2800 return 0;
9e961ae7
SG		 2801unmap_prot_cmd:
2802 if (se_cmd->t_prot_sg)
2803 isert_unmap_data_buf(isert_conn, &wr->prot);
e3d7e4c3
SG		 2804unmap_cmd:
2805 if (fr_desc) {
f01b9f73 2806 spin_lock_irqsave(&isert_conn->conn_lock, flags);
e3d7e4c3 2807 list_add_tail(&fr_desc->list, &isert_conn->conn_fr_pool);
f01b9f73 2808 spin_unlock_irqrestore(&isert_conn->conn_lock, flags);
59464ef4 2809 }
e3d7e4c3 2810 isert_unmap_data_buf(isert_conn, &wr->data);
59464ef4 2811
59464ef4
VP		 2812 return ret;
2813}
2814
90ecc6e2
VP		 2815static int
2816isert_put_datain(struct iscsi_conn *conn, struct iscsi_cmd *cmd)
2817{
2818 struct se_cmd *se_cmd = &cmd->se_cmd;
59464ef4 2819 struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd);
90ecc6e2
VP		 2820 struct isert_rdma_wr *wr = &isert_cmd->rdma_wr;
2821 struct isert_conn *isert_conn = (struct isert_conn *)conn->context;
d40945d8 2822 struct isert_device *device = isert_conn->conn_device;
90ecc6e2
VP		 2823 struct ib_send_wr *wr_failed;
2824 int rc;
2825
2826 pr_debug("Cmd: %p RDMA_WRITE data_length: %u\n",
2827 isert_cmd, se_cmd->data_length);
2828 wr->iser_ib_op = ISER_IB_RDMA_WRITE;
d40945d8 2829 rc = device->reg_rdma_mem(conn, cmd, wr);
90ecc6e2
VP		 2830 if (rc) {
2831 pr_err("Cmd: %p failed to prepare RDMA res\n", isert_cmd);
2832 return rc;
2833 }
2834
9e961ae7
SG		 2835 if (se_cmd->prot_op == TARGET_PROT_NORMAL) {
2836 /*
2837 * Build isert_conn->tx_desc for iSCSI response PDU and attach
2838 */
2839 isert_create_send_desc(isert_conn, isert_cmd,
2840 &isert_cmd->tx_desc);
2841 iscsit_build_rsp_pdu(cmd, conn, true, (struct iscsi_scsi_rsp *)
2842 &isert_cmd->tx_desc.iscsi_header);
2843 isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc);
2844 isert_init_send_wr(isert_conn, isert_cmd,
2845 &isert_cmd->tx_desc.send_wr, true);
2846 isert_cmd->rdma_wr.s_send_wr.next = &isert_cmd->tx_desc.send_wr;
897bb2c9 2847 wr->send_wr_num += 1;
9e961ae7 2848 }
b8d26b3b 2849
897bb2c9 2850 atomic_add(wr->send_wr_num, &isert_conn->post_send_buf_count);
b8d26b3b
NB		 2851
2852 rc = ib_post_send(isert_conn->conn_qp, wr->send_wr, &wr_failed);
2853 if (rc) {
2854 pr_warn("ib_post_send() failed for IB_WR_RDMA_WRITE\n");
897bb2c9 2855 atomic_sub(wr->send_wr_num, &isert_conn->post_send_buf_count);
b8d26b3b 2856 }
9e961ae7
SG		 2857
2858 if (se_cmd->prot_op == TARGET_PROT_NORMAL)
2859 pr_debug("Cmd: %p posted RDMA_WRITE + Response for iSER Data "
2860 "READ\n", isert_cmd);
2861 else
2862 pr_debug("Cmd: %p posted RDMA_WRITE for iSER Data READ\n",
2863 isert_cmd);
b8d26b3b 2864
90ecc6e2 2865 return 1;
b8d26b3b
NB		 2866}
2867
2868static int
2869isert_get_dataout(struct iscsi_conn *conn, struct iscsi_cmd *cmd, bool recovery)
2870{
2871 struct se_cmd *se_cmd = &cmd->se_cmd;
d703ce2f 2872 struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd);
b8d26b3b
NB		 2873 struct isert_rdma_wr *wr = &isert_cmd->rdma_wr;
2874 struct isert_conn *isert_conn = (struct isert_conn *)conn->context;
d40945d8 2875 struct isert_device *device = isert_conn->conn_device;
90ecc6e2
VP		 2876 struct ib_send_wr *wr_failed;
2877 int rc;
b8d26b3b 2878
90ecc6e2
VP		 2879 pr_debug("Cmd: %p RDMA_READ data_length: %u write_data_done: %u\n",
2880 isert_cmd, se_cmd->data_length, cmd->write_data_done);
b8d26b3b 2881 wr->iser_ib_op = ISER_IB_RDMA_READ;
d40945d8 2882 rc = device->reg_rdma_mem(conn, cmd, wr);
90ecc6e2
VP		 2883 if (rc) {
2884 pr_err("Cmd: %p failed to prepare RDMA res\n", isert_cmd);
2885 return rc;
b8d26b3b
NB		 2886 }
2887
b6b87a1d 2888 atomic_add(wr->send_wr_num, &isert_conn->post_send_buf_count);
b8d26b3b
NB		 2889
2890 rc = ib_post_send(isert_conn->conn_qp, wr->send_wr, &wr_failed);
2891 if (rc) {
2892 pr_warn("ib_post_send() failed for IB_WR_RDMA_READ\n");
b6b87a1d 2893 atomic_sub(wr->send_wr_num, &isert_conn->post_send_buf_count);
b8d26b3b 2894 }
90ecc6e2
VP		 2895 pr_debug("Cmd: %p posted RDMA_READ memory for ISER Data WRITE\n",
2896 isert_cmd);
b8d26b3b 2897
90ecc6e2 2898 return 0;
b8d26b3b
NB		 2899}
2900
2901static int
2902isert_immediate_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state)
2903{
2904 int ret;
2905
2906 switch (state) {
2907 case ISTATE_SEND_NOPIN_WANT_RESPONSE:
2908 ret = isert_put_nopin(cmd, conn, false);
2909 break;
2910 default:
2911 pr_err("Unknown immediate state: 0x%02x\n", state);
2912 ret = -EINVAL;
2913 break;
2914 }
2915
2916 return ret;
2917}
2918
2919static int
2920isert_response_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state)
2921{
2922 int ret;
2923
2924 switch (state) {
2925 case ISTATE_SEND_LOGOUTRSP:
2926 ret = isert_put_logout_rsp(cmd, conn);
2927 if (!ret) {
2928 pr_debug("Returning iSER Logout -EAGAIN\n");
2929 ret = -EAGAIN;
2930 }
2931 break;
2932 case ISTATE_SEND_NOPIN:
2933 ret = isert_put_nopin(cmd, conn, true);
2934 break;
2935 case ISTATE_SEND_TASKMGTRSP:
2936 ret = isert_put_tm_rsp(cmd, conn);
2937 break;
2938 case ISTATE_SEND_REJECT:
2939 ret = isert_put_reject(cmd, conn);
2940 break;
adb54c29
NB		 2941 case ISTATE_SEND_TEXTRSP:
2942 ret = isert_put_text_rsp(cmd, conn);
2943 break;
b8d26b3b
NB		 2944 case ISTATE_SEND_STATUS:
2945 /*
2946 * Special case for sending non GOOD SCSI status from TX thread
2947 * context during pre se_cmd excecution failure.
2948 */
2949 ret = isert_put_response(conn, cmd);
2950 break;
2951 default:
2952 pr_err("Unknown response state: 0x%02x\n", state);
2953 ret = -EINVAL;
2954 break;
2955 }
2956
2957 return ret;
2958}
2959
2960static int
2961isert_setup_np(struct iscsi_np *np,
2962 struct __kernel_sockaddr_storage *ksockaddr)
2963{
2964 struct isert_np *isert_np;
2965 struct rdma_cm_id *isert_lid;
2966 struct sockaddr *sa;
2967 int ret;
2968
2969 isert_np = kzalloc(sizeof(struct isert_np), GFP_KERNEL);
2970 if (!isert_np) {
2971 pr_err("Unable to allocate struct isert_np\n");
2972 return -ENOMEM;
2973 }
2974 init_waitqueue_head(&isert_np->np_accept_wq);
2975 mutex_init(&isert_np->np_accept_mutex);
2976 INIT_LIST_HEAD(&isert_np->np_accept_list);
2977 init_completion(&isert_np->np_login_comp);
2978
2979 sa = (struct sockaddr *)ksockaddr;
2980 pr_debug("ksockaddr: %p, sa: %p\n", ksockaddr, sa);
2981 /*
2982 * Setup the np->np_sockaddr from the passed sockaddr setup
2983 * in iscsi_target_configfs.c code..
2984 */
2985 memcpy(&np->np_sockaddr, ksockaddr,
2986 sizeof(struct __kernel_sockaddr_storage));
2987
2988 isert_lid = rdma_create_id(isert_cma_handler, np, RDMA_PS_TCP,
2989 IB_QPT_RC);
2990 if (IS_ERR(isert_lid)) {
2991 pr_err("rdma_create_id() for isert_listen_handler failed: %ld\n",
2992 PTR_ERR(isert_lid));
2993 ret = PTR_ERR(isert_lid);
2994 goto out;
2995 }
2996
2997 ret = rdma_bind_addr(isert_lid, sa);
2998 if (ret) {
2999 pr_err("rdma_bind_addr() for isert_lid failed: %d\n", ret);
3000 goto out_lid;
3001 }
3002
3003 ret = rdma_listen(isert_lid, ISERT_RDMA_LISTEN_BACKLOG);
3004 if (ret) {
3005 pr_err("rdma_listen() for isert_lid failed: %d\n", ret);
3006 goto out_lid;
3007 }
3008
3009 isert_np->np_cm_id = isert_lid;
3010 np->np_context = isert_np;
3011 pr_debug("Setup isert_lid->context: %p\n", isert_lid->context);
3012
3013 return 0;
3014
3015out_lid:
3016 rdma_destroy_id(isert_lid);
3017out:
3018 kfree(isert_np);
3019 return ret;
3020}
3021
3022static int
3023isert_check_accept_queue(struct isert_np *isert_np)
3024{
3025 int empty;
3026
3027 mutex_lock(&isert_np->np_accept_mutex);
3028 empty = list_empty(&isert_np->np_accept_list);
3029 mutex_unlock(&isert_np->np_accept_mutex);
3030
3031 return empty;
3032}
3033
3034static int
3035isert_rdma_accept(struct isert_conn *isert_conn)
3036{
3037 struct rdma_cm_id *cm_id = isert_conn->conn_cm_id;
3038 struct rdma_conn_param cp;
3039 int ret;
3040
3041 memset(&cp, 0, sizeof(struct rdma_conn_param));
3042 cp.responder_resources = isert_conn->responder_resources;
3043 cp.initiator_depth = isert_conn->initiator_depth;
3044 cp.retry_count = 7;
3045 cp.rnr_retry_count = 7;
3046
3047 pr_debug("Before rdma_accept >>>>>>>>>>>>>>>>>>>>.\n");
3048
3049 ret = rdma_accept(cm_id, &cp);
3050 if (ret) {
3051 pr_err("rdma_accept() failed with: %d\n", ret);
3052 return ret;
3053 }
3054
3055 pr_debug("After rdma_accept >>>>>>>>>>>>>>>>>>>>>.\n");
3056
3057 return 0;
3058}
3059
3060static int
3061isert_get_login_rx(struct iscsi_conn *conn, struct iscsi_login *login)
3062{
3063 struct isert_conn *isert_conn = (struct isert_conn *)conn->context;
3064 int ret;
3065
3066 pr_debug("isert_get_login_rx before conn_login_comp conn: %p\n", conn);
6faaa85f
NB		 3067 /*
3068 * For login requests after the first PDU, isert_rx_login_req() will
3069 * kick schedule_delayed_work(&conn->login_work) as the packet is
3070 * received, which turns this callback from iscsi_target_do_login_rx()
3071 * into a NOP.
3072 */
3073 if (!login->first_request)
3074 return 0;
b8d26b3b
NB		 3075
3076 ret = wait_for_completion_interruptible(&isert_conn->conn_login_comp);
3077 if (ret)
3078 return ret;
3079
3080 pr_debug("isert_get_login_rx processing login->req: %p\n", login->req);
3081 return 0;
3082}
3083
3084static void
3085isert_set_conn_info(struct iscsi_np *np, struct iscsi_conn *conn,
3086 struct isert_conn *isert_conn)
3087{
3088 struct rdma_cm_id *cm_id = isert_conn->conn_cm_id;
3089 struct rdma_route *cm_route = &cm_id->route;
3090 struct sockaddr_in *sock_in;
3091 struct sockaddr_in6 *sock_in6;
3092
3093 conn->login_family = np->np_sockaddr.ss_family;
3094
3095 if (np->np_sockaddr.ss_family == AF_INET6) {
3096 sock_in6 = (struct sockaddr_in6 *)&cm_route->addr.dst_addr;
3097 snprintf(conn->login_ip, sizeof(conn->login_ip), "%pI6c",
3098 &sock_in6->sin6_addr.in6_u);
3099 conn->login_port = ntohs(sock_in6->sin6_port);
3100
3101 sock_in6 = (struct sockaddr_in6 *)&cm_route->addr.src_addr;
3102 snprintf(conn->local_ip, sizeof(conn->local_ip), "%pI6c",
3103 &sock_in6->sin6_addr.in6_u);
3104 conn->local_port = ntohs(sock_in6->sin6_port);
3105 } else {
3106 sock_in = (struct sockaddr_in *)&cm_route->addr.dst_addr;
3107 sprintf(conn->login_ip, "%pI4",
3108 &sock_in->sin_addr.s_addr);
3109 conn->login_port = ntohs(sock_in->sin_port);
3110
3111 sock_in = (struct sockaddr_in *)&cm_route->addr.src_addr;
3112 sprintf(conn->local_ip, "%pI4",
3113 &sock_in->sin_addr.s_addr);
3114 conn->local_port = ntohs(sock_in->sin_port);
3115 }
3116}
3117
3118static int
3119isert_accept_np(struct iscsi_np *np, struct iscsi_conn *conn)
3120{
3121 struct isert_np *isert_np = (struct isert_np *)np->np_context;
3122 struct isert_conn *isert_conn;
3123 int max_accept = 0, ret;
3124
3125accept_wait:
3126 ret = wait_event_interruptible(isert_np->np_accept_wq,
3127 !isert_check_accept_queue(isert_np) ||
3128 np->np_thread_state == ISCSI_NP_THREAD_RESET);
3129 if (max_accept > 5)
3130 return -ENODEV;
3131
3132 spin_lock_bh(&np->np_thread_lock);
3133 if (np->np_thread_state == ISCSI_NP_THREAD_RESET) {
3134 spin_unlock_bh(&np->np_thread_lock);
3135 pr_err("ISCSI_NP_THREAD_RESET for isert_accept_np\n");
3136 return -ENODEV;
3137 }
3138 spin_unlock_bh(&np->np_thread_lock);
3139
3140 mutex_lock(&isert_np->np_accept_mutex);
3141 if (list_empty(&isert_np->np_accept_list)) {
3142 mutex_unlock(&isert_np->np_accept_mutex);
3143 max_accept++;
3144 goto accept_wait;
3145 }
3146 isert_conn = list_first_entry(&isert_np->np_accept_list,
3147 struct isert_conn, conn_accept_node);
3148 list_del_init(&isert_conn->conn_accept_node);
3149 mutex_unlock(&isert_np->np_accept_mutex);
3150
3151 conn->context = isert_conn;
3152 isert_conn->conn = conn;
3153 max_accept = 0;
3154
3155 ret = isert_rdma_post_recvl(isert_conn);
3156 if (ret)
3157 return ret;
3158
3159 ret = isert_rdma_accept(isert_conn);
3160 if (ret)
3161 return ret;
3162
3163 isert_set_conn_info(np, conn, isert_conn);
3164
3165 pr_debug("Processing isert_accept_np: isert_conn: %p\n", isert_conn);
3166 return 0;
3167}
3168
3169static void
3170isert_free_np(struct iscsi_np *np)
3171{
3172 struct isert_np *isert_np = (struct isert_np *)np->np_context;
3173
3174 rdma_destroy_id(isert_np->np_cm_id);
3175
3176 np->np_context = NULL;
3177 kfree(isert_np);
3178}
3179
defd8848 3180static void isert_wait_conn(struct iscsi_conn *conn)
b8d26b3b
NB		 3181{
3182 struct isert_conn *isert_conn = conn->context;
3183
defd8848 3184 pr_debug("isert_wait_conn: Starting \n");
b8d26b3b
NB		 3185 /*
3186 * Decrement post_send_buf_count for special case when called
3187 * from isert_do_control_comp() -> iscsit_logout_post_handler()
3188 */
b2cb9649 3189 mutex_lock(&isert_conn->conn_mutex);
b8d26b3b
NB		 3190 if (isert_conn->logout_posted)
3191 atomic_dec(&isert_conn->post_send_buf_count);
3192
b2cb9649 3193 if (isert_conn->conn_cm_id && isert_conn->state != ISER_CONN_DOWN) {
defd8848 3194 pr_debug("Calling rdma_disconnect from isert_wait_conn\n");
b8d26b3b 3195 rdma_disconnect(isert_conn->conn_cm_id);
b2cb9649 3196 }
b8d26b3b
NB		 3197 /*
3198 * Only wait for conn_wait_comp_err if the isert_conn made it
3199 * into full feature phase..
3200 */
b2cb9649
NB		 3201 if (isert_conn->state == ISER_CONN_INIT) {
3202 mutex_unlock(&isert_conn->conn_mutex);
b2cb9649 3203 return;
b8d26b3b 3204 }
defd8848
NB		 3205 if (isert_conn->state == ISER_CONN_UP)
3206 isert_conn->state = ISER_CONN_TERMINATING;
b2cb9649 3207 mutex_unlock(&isert_conn->conn_mutex);
b8d26b3b 3208
defd8848
NB		 3209 wait_for_completion(&isert_conn->conn_wait_comp_err);
3210
3211 wait_for_completion(&isert_conn->conn_wait);
3212}
3213
3214static void isert_free_conn(struct iscsi_conn *conn)
3215{
3216 struct isert_conn *isert_conn = conn->context;
b8d26b3b
NB		 3217
3218 isert_put_conn(isert_conn);
3219}
3220
3221static struct iscsit_transport iser_target_transport = {
3222 .name = "IB/iSER",
3223 .transport_type = ISCSI_INFINIBAND,
d703ce2f 3224 .priv_size = sizeof(struct isert_cmd),
b8d26b3b
NB		 3225 .owner = THIS_MODULE,
3226 .iscsit_setup_np = isert_setup_np,
3227 .iscsit_accept_np = isert_accept_np,
3228 .iscsit_free_np = isert_free_np,
defd8848 3229 .iscsit_wait_conn = isert_wait_conn,
b8d26b3b 3230 .iscsit_free_conn = isert_free_conn,
b8d26b3b
NB		 3231 .iscsit_get_login_rx = isert_get_login_rx,
3232 .iscsit_put_login_tx = isert_put_login_tx,
3233 .iscsit_immediate_queue = isert_immediate_queue,
3234 .iscsit_response_queue = isert_response_queue,
3235 .iscsit_get_dataout = isert_get_dataout,
3236 .iscsit_queue_data_in = isert_put_datain,
3237 .iscsit_queue_status = isert_put_response,
131e6abc 3238 .iscsit_aborted_task = isert_aborted_task,
b8d26b3b
NB		 3239};
3240
3241static int __init isert_init(void)
3242{
3243 int ret;
3244
3245 isert_rx_wq = alloc_workqueue("isert_rx_wq", 0, 0);
3246 if (!isert_rx_wq) {
3247 pr_err("Unable to allocate isert_rx_wq\n");
3248 return -ENOMEM;
3249 }
3250
3251 isert_comp_wq = alloc_workqueue("isert_comp_wq", 0, 0);
3252 if (!isert_comp_wq) {
3253 pr_err("Unable to allocate isert_comp_wq\n");
3254 ret = -ENOMEM;
3255 goto destroy_rx_wq;
3256 }
3257
b8d26b3b
NB		 3258 iscsit_register_transport(&iser_target_transport);
3259 pr_debug("iSER_TARGET[0] - Loaded iser_target_transport\n");
3260 return 0;
3261
b8d26b3b
NB		 3262destroy_rx_wq:
3263 destroy_workqueue(isert_rx_wq);
3264 return ret;
3265}
3266
3267static void __exit isert_exit(void)
3268{
b8d26b3b
NB		 3269 destroy_workqueue(isert_comp_wq);
3270 destroy_workqueue(isert_rx_wq);
3271 iscsit_unregister_transport(&iser_target_transport);
3272 pr_debug("iSER_TARGET[0] - Released iser_target_transport\n");
3273}
3274
3275MODULE_DESCRIPTION("iSER-Target for mainline target infrastructure");
3276MODULE_VERSION("0.1");
3277MODULE_AUTHOR("nab@Linux-iSCSI.org");
3278MODULE_LICENSE("GPL");
3279
3280module_init(isert_init);
3281module_exit(isert_exit);
Linux kernel - Deliverables
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