2 * Copyright (c) 2004, 2005, 2006 Voltaire, Inc. All rights reserved.
3 * Copyright (c) 2013-2014 Mellanox Technologies. All rights reserved.
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 #include <linux/kernel.h>
34 #include <linux/slab.h>
36 #include <linux/scatterlist.h>
37 #include <linux/kfifo.h>
38 #include <scsi/scsi_cmnd.h>
39 #include <scsi/scsi_host.h>
41 #include "iscsi_iser.h"
43 /* Register user buffer memory and initialize passive rdma
44 * dto descriptor. Data size is stored in
45 * task->data[ISER_DIR_IN].data_len, Protection size
46 * os stored in task->prot[ISER_DIR_IN].data_len
48 static int iser_prepare_read_cmd(struct iscsi_task *task)
51 struct iscsi_iser_task *iser_task = task->dd_data;
52 struct iser_device *device = iser_task->iser_conn->ib_conn.device;
53 struct iser_regd_buf *regd_buf;
55 struct iser_hdr *hdr = &iser_task->desc.iser_header;
56 struct iser_data_buf *buf_in = &iser_task->data[ISER_DIR_IN];
58 err = iser_dma_map_task_data(iser_task,
65 if (scsi_prot_sg_count(iser_task->sc)) {
66 struct iser_data_buf *pbuf_in = &iser_task->prot[ISER_DIR_IN];
68 err = iser_dma_map_task_data(iser_task,
76 err = device->iser_reg_rdma_mem(iser_task, ISER_DIR_IN);
78 iser_err("Failed to set up Data-IN RDMA\n");
81 regd_buf = &iser_task->rdma_regd[ISER_DIR_IN];
83 hdr->flags |= ISER_RSV;
84 hdr->read_stag = cpu_to_be32(regd_buf->reg.rkey);
85 hdr->read_va = cpu_to_be64(regd_buf->reg.va);
87 iser_dbg("Cmd itt:%d READ tags RKEY:%#.4X VA:%#llX\n",
88 task->itt, regd_buf->reg.rkey,
89 (unsigned long long)regd_buf->reg.va);
94 /* Register user buffer memory and initialize passive rdma
95 * dto descriptor. Data size is stored in
96 * task->data[ISER_DIR_OUT].data_len, Protection size
97 * is stored at task->prot[ISER_DIR_OUT].data_len
100 iser_prepare_write_cmd(struct iscsi_task *task,
102 unsigned int unsol_sz,
105 struct iscsi_iser_task *iser_task = task->dd_data;
106 struct iser_device *device = iser_task->iser_conn->ib_conn.device;
107 struct iser_regd_buf *regd_buf;
109 struct iser_hdr *hdr = &iser_task->desc.iser_header;
110 struct iser_data_buf *buf_out = &iser_task->data[ISER_DIR_OUT];
111 struct ib_sge *tx_dsg = &iser_task->desc.tx_sg[1];
113 err = iser_dma_map_task_data(iser_task,
120 if (scsi_prot_sg_count(iser_task->sc)) {
121 struct iser_data_buf *pbuf_out = &iser_task->prot[ISER_DIR_OUT];
123 err = iser_dma_map_task_data(iser_task,
131 err = device->iser_reg_rdma_mem(iser_task, ISER_DIR_OUT);
133 iser_err("Failed to register write cmd RDMA mem\n");
137 regd_buf = &iser_task->rdma_regd[ISER_DIR_OUT];
139 if (unsol_sz < edtl) {
140 hdr->flags |= ISER_WSV;
141 hdr->write_stag = cpu_to_be32(regd_buf->reg.rkey);
142 hdr->write_va = cpu_to_be64(regd_buf->reg.va + unsol_sz);
144 iser_dbg("Cmd itt:%d, WRITE tags, RKEY:%#.4X "
145 "VA:%#llX + unsol:%d\n",
146 task->itt, regd_buf->reg.rkey,
147 (unsigned long long)regd_buf->reg.va, unsol_sz);
151 iser_dbg("Cmd itt:%d, WRITE, adding imm.data sz: %d\n",
153 tx_dsg->addr = regd_buf->reg.va;
154 tx_dsg->length = imm_sz;
155 tx_dsg->lkey = regd_buf->reg.lkey;
156 iser_task->desc.num_sge = 2;
162 /* creates a new tx descriptor and adds header regd buffer */
163 static void iser_create_send_desc(struct iser_conn *iser_conn,
164 struct iser_tx_desc *tx_desc)
166 struct iser_device *device = iser_conn->ib_conn.device;
168 ib_dma_sync_single_for_cpu(device->ib_device,
169 tx_desc->dma_addr, ISER_HEADERS_LEN, DMA_TO_DEVICE);
171 memset(&tx_desc->iser_header, 0, sizeof(struct iser_hdr));
172 tx_desc->iser_header.flags = ISER_VER;
174 tx_desc->num_sge = 1;
176 if (tx_desc->tx_sg[0].lkey != device->mr->lkey) {
177 tx_desc->tx_sg[0].lkey = device->mr->lkey;
178 iser_dbg("sdesc %p lkey mismatch, fixing\n", tx_desc);
182 static void iser_free_login_buf(struct iser_conn *iser_conn)
184 struct iser_device *device = iser_conn->ib_conn.device;
186 if (!iser_conn->login_buf)
189 if (iser_conn->login_req_dma)
190 ib_dma_unmap_single(device->ib_device,
191 iser_conn->login_req_dma,
192 ISCSI_DEF_MAX_RECV_SEG_LEN, DMA_TO_DEVICE);
194 if (iser_conn->login_resp_dma)
195 ib_dma_unmap_single(device->ib_device,
196 iser_conn->login_resp_dma,
197 ISER_RX_LOGIN_SIZE, DMA_FROM_DEVICE);
199 kfree(iser_conn->login_buf);
201 /* make sure we never redo any unmapping */
202 iser_conn->login_req_dma = 0;
203 iser_conn->login_resp_dma = 0;
204 iser_conn->login_buf = NULL;
207 static int iser_alloc_login_buf(struct iser_conn *iser_conn)
209 struct iser_device *device = iser_conn->ib_conn.device;
210 int req_err, resp_err;
212 BUG_ON(device == NULL);
214 iser_conn->login_buf = kmalloc(ISCSI_DEF_MAX_RECV_SEG_LEN +
215 ISER_RX_LOGIN_SIZE, GFP_KERNEL);
216 if (!iser_conn->login_buf)
219 iser_conn->login_req_buf = iser_conn->login_buf;
220 iser_conn->login_resp_buf = iser_conn->login_buf +
221 ISCSI_DEF_MAX_RECV_SEG_LEN;
223 iser_conn->login_req_dma = ib_dma_map_single(device->ib_device,
224 iser_conn->login_req_buf,
225 ISCSI_DEF_MAX_RECV_SEG_LEN,
228 iser_conn->login_resp_dma = ib_dma_map_single(device->ib_device,
229 iser_conn->login_resp_buf,
233 req_err = ib_dma_mapping_error(device->ib_device,
234 iser_conn->login_req_dma);
235 resp_err = ib_dma_mapping_error(device->ib_device,
236 iser_conn->login_resp_dma);
238 if (req_err || resp_err) {
240 iser_conn->login_req_dma = 0;
242 iser_conn->login_resp_dma = 0;
248 iser_free_login_buf(iser_conn);
251 iser_err("unable to alloc or map login buf\n");
255 int iser_alloc_rx_descriptors(struct iser_conn *iser_conn,
256 struct iscsi_session *session)
260 struct iser_rx_desc *rx_desc;
261 struct ib_sge *rx_sg;
262 struct ib_conn *ib_conn = &iser_conn->ib_conn;
263 struct iser_device *device = ib_conn->device;
265 iser_conn->qp_max_recv_dtos = session->cmds_max;
266 iser_conn->qp_max_recv_dtos_mask = session->cmds_max - 1; /* cmds_max is 2^N */
267 iser_conn->min_posted_rx = iser_conn->qp_max_recv_dtos >> 2;
269 if (device->iser_alloc_rdma_reg_res(ib_conn, session->scsi_cmds_max))
270 goto create_rdma_reg_res_failed;
272 if (iser_alloc_login_buf(iser_conn))
273 goto alloc_login_buf_fail;
275 iser_conn->num_rx_descs = session->cmds_max;
276 iser_conn->rx_descs = kmalloc(iser_conn->num_rx_descs *
277 sizeof(struct iser_rx_desc), GFP_KERNEL);
278 if (!iser_conn->rx_descs)
279 goto rx_desc_alloc_fail;
281 rx_desc = iser_conn->rx_descs;
283 for (i = 0; i < iser_conn->qp_max_recv_dtos; i++, rx_desc++) {
284 dma_addr = ib_dma_map_single(device->ib_device, (void *)rx_desc,
285 ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE);
286 if (ib_dma_mapping_error(device->ib_device, dma_addr))
287 goto rx_desc_dma_map_failed;
289 rx_desc->dma_addr = dma_addr;
291 rx_sg = &rx_desc->rx_sg;
292 rx_sg->addr = rx_desc->dma_addr;
293 rx_sg->length = ISER_RX_PAYLOAD_SIZE;
294 rx_sg->lkey = device->mr->lkey;
297 iser_conn->rx_desc_head = 0;
300 rx_desc_dma_map_failed:
301 rx_desc = iser_conn->rx_descs;
302 for (j = 0; j < i; j++, rx_desc++)
303 ib_dma_unmap_single(device->ib_device, rx_desc->dma_addr,
304 ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE);
305 kfree(iser_conn->rx_descs);
306 iser_conn->rx_descs = NULL;
308 iser_free_login_buf(iser_conn);
309 alloc_login_buf_fail:
310 device->iser_free_rdma_reg_res(ib_conn);
311 create_rdma_reg_res_failed:
312 iser_err("failed allocating rx descriptors / data buffers\n");
316 void iser_free_rx_descriptors(struct iser_conn *iser_conn)
319 struct iser_rx_desc *rx_desc;
320 struct ib_conn *ib_conn = &iser_conn->ib_conn;
321 struct iser_device *device = ib_conn->device;
323 if (!iser_conn->rx_descs)
326 if (device->iser_free_rdma_reg_res)
327 device->iser_free_rdma_reg_res(ib_conn);
329 rx_desc = iser_conn->rx_descs;
330 for (i = 0; i < iser_conn->qp_max_recv_dtos; i++, rx_desc++)
331 ib_dma_unmap_single(device->ib_device, rx_desc->dma_addr,
332 ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE);
333 kfree(iser_conn->rx_descs);
334 /* make sure we never redo any unmapping */
335 iser_conn->rx_descs = NULL;
338 iser_free_login_buf(iser_conn);
341 static int iser_post_rx_bufs(struct iscsi_conn *conn, struct iscsi_hdr *req)
343 struct iser_conn *iser_conn = conn->dd_data;
344 struct ib_conn *ib_conn = &iser_conn->ib_conn;
345 struct iscsi_session *session = conn->session;
347 iser_dbg("req op %x flags %x\n", req->opcode, req->flags);
348 /* check if this is the last login - going to full feature phase */
349 if ((req->flags & ISCSI_FULL_FEATURE_PHASE) != ISCSI_FULL_FEATURE_PHASE)
353 * Check that there is one posted recv buffer
354 * (for the last login response).
356 WARN_ON(ib_conn->post_recv_buf_count != 1);
358 if (session->discovery_sess) {
359 iser_info("Discovery session, re-using login RX buffer\n");
362 iser_info("Normal session, posting batch of RX %d buffers\n",
363 iser_conn->min_posted_rx);
365 /* Initial post receive buffers */
366 if (iser_post_recvm(iser_conn, iser_conn->min_posted_rx))
372 static inline bool iser_signal_comp(u8 sig_count)
374 return ((sig_count % ISER_SIGNAL_CMD_COUNT) == 0);
378 * iser_send_command - send command PDU
380 int iser_send_command(struct iscsi_conn *conn,
381 struct iscsi_task *task)
383 struct iser_conn *iser_conn = conn->dd_data;
384 struct iscsi_iser_task *iser_task = task->dd_data;
387 struct iser_data_buf *data_buf, *prot_buf;
388 struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)task->hdr;
389 struct scsi_cmnd *sc = task->sc;
390 struct iser_tx_desc *tx_desc = &iser_task->desc;
391 u8 sig_count = ++iser_conn->ib_conn.sig_count;
393 edtl = ntohl(hdr->data_length);
395 /* build the tx desc regd header and add it to the tx desc dto */
396 tx_desc->type = ISCSI_TX_SCSI_COMMAND;
397 iser_create_send_desc(iser_conn, tx_desc);
399 if (hdr->flags & ISCSI_FLAG_CMD_READ) {
400 data_buf = &iser_task->data[ISER_DIR_IN];
401 prot_buf = &iser_task->prot[ISER_DIR_IN];
403 data_buf = &iser_task->data[ISER_DIR_OUT];
404 prot_buf = &iser_task->prot[ISER_DIR_OUT];
407 if (scsi_sg_count(sc)) { /* using a scatter list */
408 data_buf->buf = scsi_sglist(sc);
409 data_buf->size = scsi_sg_count(sc);
411 data_buf->data_len = scsi_bufflen(sc);
413 if (scsi_prot_sg_count(sc)) {
414 prot_buf->buf = scsi_prot_sglist(sc);
415 prot_buf->size = scsi_prot_sg_count(sc);
416 prot_buf->data_len = data_buf->data_len >>
417 ilog2(sc->device->sector_size) * 8;
420 if (hdr->flags & ISCSI_FLAG_CMD_READ) {
421 err = iser_prepare_read_cmd(task);
423 goto send_command_error;
425 if (hdr->flags & ISCSI_FLAG_CMD_WRITE) {
426 err = iser_prepare_write_cmd(task,
429 task->unsol_r2t.data_length,
432 goto send_command_error;
435 iser_task->status = ISER_TASK_STATUS_STARTED;
437 err = iser_post_send(&iser_conn->ib_conn, tx_desc,
438 iser_signal_comp(sig_count));
443 iser_err("conn %p failed task->itt %d err %d\n",conn, task->itt, err);
448 * iser_send_data_out - send data out PDU
450 int iser_send_data_out(struct iscsi_conn *conn,
451 struct iscsi_task *task,
452 struct iscsi_data *hdr)
454 struct iser_conn *iser_conn = conn->dd_data;
455 struct iscsi_iser_task *iser_task = task->dd_data;
456 struct iser_tx_desc *tx_desc = NULL;
457 struct iser_regd_buf *regd_buf;
458 unsigned long buf_offset;
459 unsigned long data_seg_len;
462 struct ib_sge *tx_dsg;
464 itt = (__force uint32_t)hdr->itt;
465 data_seg_len = ntoh24(hdr->dlength);
466 buf_offset = ntohl(hdr->offset);
468 iser_dbg("%s itt %d dseg_len %d offset %d\n",
469 __func__,(int)itt,(int)data_seg_len,(int)buf_offset);
471 tx_desc = kmem_cache_zalloc(ig.desc_cache, GFP_ATOMIC);
472 if (tx_desc == NULL) {
473 iser_err("Failed to alloc desc for post dataout\n");
477 tx_desc->type = ISCSI_TX_DATAOUT;
478 tx_desc->iser_header.flags = ISER_VER;
479 memcpy(&tx_desc->iscsi_header, hdr, sizeof(struct iscsi_hdr));
481 /* build the tx desc */
482 iser_initialize_task_headers(task, tx_desc);
484 regd_buf = &iser_task->rdma_regd[ISER_DIR_OUT];
485 tx_dsg = &tx_desc->tx_sg[1];
486 tx_dsg->addr = regd_buf->reg.va + buf_offset;
487 tx_dsg->length = data_seg_len;
488 tx_dsg->lkey = regd_buf->reg.lkey;
489 tx_desc->num_sge = 2;
491 if (buf_offset + data_seg_len > iser_task->data[ISER_DIR_OUT].data_len) {
492 iser_err("Offset:%ld & DSL:%ld in Data-Out "
493 "inconsistent with total len:%ld, itt:%d\n",
494 buf_offset, data_seg_len,
495 iser_task->data[ISER_DIR_OUT].data_len, itt);
497 goto send_data_out_error;
499 iser_dbg("data-out itt: %d, offset: %ld, sz: %ld\n",
500 itt, buf_offset, data_seg_len);
503 err = iser_post_send(&iser_conn->ib_conn, tx_desc, true);
508 kmem_cache_free(ig.desc_cache, tx_desc);
509 iser_err("conn %p failed err %d\n",conn, err);
513 int iser_send_control(struct iscsi_conn *conn,
514 struct iscsi_task *task)
516 struct iser_conn *iser_conn = conn->dd_data;
517 struct iscsi_iser_task *iser_task = task->dd_data;
518 struct iser_tx_desc *mdesc = &iser_task->desc;
519 unsigned long data_seg_len;
521 struct iser_device *device;
523 /* build the tx desc regd header and add it to the tx desc dto */
524 mdesc->type = ISCSI_TX_CONTROL;
525 iser_create_send_desc(iser_conn, mdesc);
527 device = iser_conn->ib_conn.device;
529 data_seg_len = ntoh24(task->hdr->dlength);
531 if (data_seg_len > 0) {
532 struct ib_sge *tx_dsg = &mdesc->tx_sg[1];
533 if (task != conn->login_task) {
534 iser_err("data present on non login task!!!\n");
535 goto send_control_error;
538 ib_dma_sync_single_for_cpu(device->ib_device,
539 iser_conn->login_req_dma, task->data_count,
542 memcpy(iser_conn->login_req_buf, task->data, task->data_count);
544 ib_dma_sync_single_for_device(device->ib_device,
545 iser_conn->login_req_dma, task->data_count,
548 tx_dsg->addr = iser_conn->login_req_dma;
549 tx_dsg->length = task->data_count;
550 tx_dsg->lkey = device->mr->lkey;
554 if (task == conn->login_task) {
555 iser_dbg("op %x dsl %lx, posting login rx buffer\n",
556 task->hdr->opcode, data_seg_len);
557 err = iser_post_recvl(iser_conn);
559 goto send_control_error;
560 err = iser_post_rx_bufs(conn, task->hdr);
562 goto send_control_error;
565 err = iser_post_send(&iser_conn->ib_conn, mdesc, true);
570 iser_err("conn %p failed err %d\n",conn, err);
575 * iser_rcv_dto_completion - recv DTO completion
577 void iser_rcv_completion(struct iser_rx_desc *rx_desc,
578 unsigned long rx_xfer_len,
579 struct ib_conn *ib_conn)
581 struct iser_conn *iser_conn = container_of(ib_conn, struct iser_conn,
583 struct iscsi_hdr *hdr;
585 int rx_buflen, outstanding, count, err;
587 /* differentiate between login to all other PDUs */
588 if ((char *)rx_desc == iser_conn->login_resp_buf) {
589 rx_dma = iser_conn->login_resp_dma;
590 rx_buflen = ISER_RX_LOGIN_SIZE;
592 rx_dma = rx_desc->dma_addr;
593 rx_buflen = ISER_RX_PAYLOAD_SIZE;
596 ib_dma_sync_single_for_cpu(ib_conn->device->ib_device, rx_dma,
597 rx_buflen, DMA_FROM_DEVICE);
599 hdr = &rx_desc->iscsi_header;
601 iser_dbg("op 0x%x itt 0x%x dlen %d\n", hdr->opcode,
602 hdr->itt, (int)(rx_xfer_len - ISER_HEADERS_LEN));
604 iscsi_iser_recv(iser_conn->iscsi_conn, hdr, rx_desc->data,
605 rx_xfer_len - ISER_HEADERS_LEN);
607 ib_dma_sync_single_for_device(ib_conn->device->ib_device, rx_dma,
608 rx_buflen, DMA_FROM_DEVICE);
610 /* decrementing conn->post_recv_buf_count only --after-- freeing the *
611 * task eliminates the need to worry on tasks which are completed in *
612 * parallel to the execution of iser_conn_term. So the code that waits *
613 * for the posted rx bufs refcount to become zero handles everything */
614 ib_conn->post_recv_buf_count--;
616 if (rx_dma == iser_conn->login_resp_dma)
619 outstanding = ib_conn->post_recv_buf_count;
620 if (outstanding + iser_conn->min_posted_rx <= iser_conn->qp_max_recv_dtos) {
621 count = min(iser_conn->qp_max_recv_dtos - outstanding,
622 iser_conn->min_posted_rx);
623 err = iser_post_recvm(iser_conn, count);
625 iser_err("posting %d rx bufs err %d\n", count, err);
629 void iser_snd_completion(struct iser_tx_desc *tx_desc,
630 struct ib_conn *ib_conn)
632 struct iscsi_task *task;
633 struct iser_device *device = ib_conn->device;
635 if (tx_desc->type == ISCSI_TX_DATAOUT) {
636 ib_dma_unmap_single(device->ib_device, tx_desc->dma_addr,
637 ISER_HEADERS_LEN, DMA_TO_DEVICE);
638 kmem_cache_free(ig.desc_cache, tx_desc);
642 if (tx_desc && tx_desc->type == ISCSI_TX_CONTROL) {
643 /* this arithmetic is legal by libiscsi dd_data allocation */
644 task = (void *) ((long)(void *)tx_desc -
645 sizeof(struct iscsi_task));
646 if (task->hdr->itt == RESERVED_ITT)
647 iscsi_put_task(task);
651 void iser_task_rdma_init(struct iscsi_iser_task *iser_task)
654 iser_task->status = ISER_TASK_STATUS_INIT;
656 iser_task->dir[ISER_DIR_IN] = 0;
657 iser_task->dir[ISER_DIR_OUT] = 0;
659 iser_task->data[ISER_DIR_IN].data_len = 0;
660 iser_task->data[ISER_DIR_OUT].data_len = 0;
662 iser_task->prot[ISER_DIR_IN].data_len = 0;
663 iser_task->prot[ISER_DIR_OUT].data_len = 0;
665 memset(&iser_task->rdma_regd[ISER_DIR_IN], 0,
666 sizeof(struct iser_regd_buf));
667 memset(&iser_task->rdma_regd[ISER_DIR_OUT], 0,
668 sizeof(struct iser_regd_buf));
671 void iser_task_rdma_finalize(struct iscsi_iser_task *iser_task)
673 struct iser_device *device = iser_task->iser_conn->ib_conn.device;
674 int is_rdma_data_aligned = 1;
675 int is_rdma_prot_aligned = 1;
676 int prot_count = scsi_prot_sg_count(iser_task->sc);
678 /* if we were reading, copy back to unaligned sglist,
679 * anyway dma_unmap and free the copy
681 if (iser_task->data_copy[ISER_DIR_IN].copy_buf != NULL) {
682 is_rdma_data_aligned = 0;
683 iser_finalize_rdma_unaligned_sg(iser_task,
684 &iser_task->data[ISER_DIR_IN],
685 &iser_task->data_copy[ISER_DIR_IN],
689 if (iser_task->data_copy[ISER_DIR_OUT].copy_buf != NULL) {
690 is_rdma_data_aligned = 0;
691 iser_finalize_rdma_unaligned_sg(iser_task,
692 &iser_task->data[ISER_DIR_OUT],
693 &iser_task->data_copy[ISER_DIR_OUT],
697 if (iser_task->prot_copy[ISER_DIR_IN].copy_buf != NULL) {
698 is_rdma_prot_aligned = 0;
699 iser_finalize_rdma_unaligned_sg(iser_task,
700 &iser_task->prot[ISER_DIR_IN],
701 &iser_task->prot_copy[ISER_DIR_IN],
705 if (iser_task->prot_copy[ISER_DIR_OUT].copy_buf != NULL) {
706 is_rdma_prot_aligned = 0;
707 iser_finalize_rdma_unaligned_sg(iser_task,
708 &iser_task->prot[ISER_DIR_OUT],
709 &iser_task->prot_copy[ISER_DIR_OUT],
713 if (iser_task->dir[ISER_DIR_IN]) {
714 device->iser_unreg_rdma_mem(iser_task, ISER_DIR_IN);
715 if (is_rdma_data_aligned)
716 iser_dma_unmap_task_data(iser_task,
717 &iser_task->data[ISER_DIR_IN]);
718 if (prot_count && is_rdma_prot_aligned)
719 iser_dma_unmap_task_data(iser_task,
720 &iser_task->prot[ISER_DIR_IN]);
723 if (iser_task->dir[ISER_DIR_OUT]) {
724 device->iser_unreg_rdma_mem(iser_task, ISER_DIR_OUT);
725 if (is_rdma_data_aligned)
726 iser_dma_unmap_task_data(iser_task,
727 &iser_task->data[ISER_DIR_OUT]);
728 if (prot_count && is_rdma_prot_aligned)
729 iser_dma_unmap_task_data(iser_task,
730 &iser_task->prot[ISER_DIR_OUT]);