1 /*******************************************************************************
2 * Filename: target_core_pscsi.c
4 * This file contains the generic target mode <-> Linux SCSI subsystem plugin.
6 * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc.
7 * Copyright (c) 2005, 2006, 2007 SBE, Inc.
8 * Copyright (c) 2007-2010 Rising Tide Systems
9 * Copyright (c) 2008-2010 Linux-iSCSI.org
11 * Nicholas A. Bellinger <nab@kernel.org>
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
27 ******************************************************************************/
29 #include <linux/string.h>
30 #include <linux/parser.h>
31 #include <linux/timer.h>
32 #include <linux/blkdev.h>
33 #include <linux/blk_types.h>
34 #include <linux/slab.h>
35 #include <linux/spinlock.h>
36 #include <linux/genhd.h>
37 #include <linux/cdrom.h>
38 #include <linux/ratelimit.h>
39 #include <linux/module.h>
40 #include <asm/unaligned.h>
42 #include <scsi/scsi.h>
43 #include <scsi/scsi_device.h>
44 #include <scsi/scsi_cmnd.h>
45 #include <scsi/scsi_host.h>
46 #include <scsi/scsi_tcq.h>
48 #include <target/target_core_base.h>
49 #include <target/target_core_backend.h>
51 #include "target_core_alua.h"
52 #include "target_core_pscsi.h"
54 #define ISPRINT(a) ((a >= ' ') && (a <= '~'))
56 static struct se_subsystem_api pscsi_template
;
58 static void pscsi_req_done(struct request
*, int);
60 /* pscsi_attach_hba():
62 * pscsi_get_sh() used scsi_host_lookup() to locate struct Scsi_Host.
63 * from the passed SCSI Host ID.
65 static int pscsi_attach_hba(struct se_hba
*hba
, u32 host_id
)
67 struct pscsi_hba_virt
*phv
;
69 phv
= kzalloc(sizeof(struct pscsi_hba_virt
), GFP_KERNEL
);
71 pr_err("Unable to allocate struct pscsi_hba_virt\n");
74 phv
->phv_host_id
= host_id
;
75 phv
->phv_mode
= PHV_VIRTUAL_HOST_ID
;
79 pr_debug("CORE_HBA[%d] - TCM SCSI HBA Driver %s on"
80 " Generic Target Core Stack %s\n", hba
->hba_id
,
81 PSCSI_VERSION
, TARGET_CORE_MOD_VERSION
);
82 pr_debug("CORE_HBA[%d] - Attached SCSI HBA to Generic\n",
88 static void pscsi_detach_hba(struct se_hba
*hba
)
90 struct pscsi_hba_virt
*phv
= hba
->hba_ptr
;
91 struct Scsi_Host
*scsi_host
= phv
->phv_lld_host
;
94 scsi_host_put(scsi_host
);
96 pr_debug("CORE_HBA[%d] - Detached SCSI HBA: %s from"
97 " Generic Target Core\n", hba
->hba_id
,
98 (scsi_host
->hostt
->name
) ? (scsi_host
->hostt
->name
) :
101 pr_debug("CORE_HBA[%d] - Detached Virtual SCSI HBA"
102 " from Generic Target Core\n", hba
->hba_id
);
108 static int pscsi_pmode_enable_hba(struct se_hba
*hba
, unsigned long mode_flag
)
110 struct pscsi_hba_virt
*phv
= hba
->hba_ptr
;
111 struct Scsi_Host
*sh
= phv
->phv_lld_host
;
113 * Release the struct Scsi_Host
119 phv
->phv_lld_host
= NULL
;
120 phv
->phv_mode
= PHV_VIRTUAL_HOST_ID
;
122 pr_debug("CORE_HBA[%d] - Disabled pSCSI HBA Passthrough"
123 " %s\n", hba
->hba_id
, (sh
->hostt
->name
) ?
124 (sh
->hostt
->name
) : "Unknown");
130 * Otherwise, locate struct Scsi_Host from the original passed
131 * pSCSI Host ID and enable for phba mode
133 sh
= scsi_host_lookup(phv
->phv_host_id
);
135 pr_err("pSCSI: Unable to locate SCSI Host for"
136 " phv_host_id: %d\n", phv
->phv_host_id
);
140 phv
->phv_lld_host
= sh
;
141 phv
->phv_mode
= PHV_LLD_SCSI_HOST_NO
;
143 pr_debug("CORE_HBA[%d] - Enabled pSCSI HBA Passthrough %s\n",
144 hba
->hba_id
, (sh
->hostt
->name
) ? (sh
->hostt
->name
) : "Unknown");
149 static void pscsi_tape_read_blocksize(struct se_device
*dev
,
150 struct scsi_device
*sdev
)
152 unsigned char cdb
[MAX_COMMAND_SIZE
], *buf
;
155 buf
= kzalloc(12, GFP_KERNEL
);
159 memset(cdb
, 0, MAX_COMMAND_SIZE
);
161 cdb
[4] = 0x0c; /* 12 bytes */
163 ret
= scsi_execute_req(sdev
, cdb
, DMA_FROM_DEVICE
, buf
, 12, NULL
,
169 * If MODE_SENSE still returns zero, set the default value to 1024.
171 sdev
->sector_size
= (buf
[9] << 16) | (buf
[10] << 8) | (buf
[11]);
172 if (!sdev
->sector_size
)
173 sdev
->sector_size
= 1024;
179 pscsi_set_inquiry_info(struct scsi_device
*sdev
, struct t10_wwn
*wwn
)
183 if (sdev
->inquiry_len
< INQUIRY_LEN
)
190 * Use sdev->inquiry from drivers/scsi/scsi_scan.c:scsi_alloc_sdev()
192 memcpy(&wwn
->vendor
[0], &buf
[8], sizeof(wwn
->vendor
));
193 memcpy(&wwn
->model
[0], &buf
[16], sizeof(wwn
->model
));
194 memcpy(&wwn
->revision
[0], &buf
[32], sizeof(wwn
->revision
));
198 pscsi_get_inquiry_vpd_serial(struct scsi_device
*sdev
, struct t10_wwn
*wwn
)
200 unsigned char cdb
[MAX_COMMAND_SIZE
], *buf
;
203 buf
= kzalloc(INQUIRY_VPD_SERIAL_LEN
, GFP_KERNEL
);
207 memset(cdb
, 0, MAX_COMMAND_SIZE
);
209 cdb
[1] = 0x01; /* Query VPD */
210 cdb
[2] = 0x80; /* Unit Serial Number */
211 cdb
[3] = (INQUIRY_VPD_SERIAL_LEN
>> 8) & 0xff;
212 cdb
[4] = (INQUIRY_VPD_SERIAL_LEN
& 0xff);
214 ret
= scsi_execute_req(sdev
, cdb
, DMA_FROM_DEVICE
, buf
,
215 INQUIRY_VPD_SERIAL_LEN
, NULL
, HZ
, 1, NULL
);
219 snprintf(&wwn
->unit_serial
[0], INQUIRY_VPD_SERIAL_LEN
, "%s", &buf
[4]);
221 wwn
->t10_sub_dev
->su_dev_flags
|= SDF_FIRMWARE_VPD_UNIT_SERIAL
;
232 pscsi_get_inquiry_vpd_device_ident(struct scsi_device
*sdev
,
235 unsigned char cdb
[MAX_COMMAND_SIZE
], *buf
, *page_83
;
236 int ident_len
, page_len
, off
= 4, ret
;
239 buf
= kzalloc(INQUIRY_VPD_SERIAL_LEN
, GFP_KERNEL
);
243 memset(cdb
, 0, MAX_COMMAND_SIZE
);
245 cdb
[1] = 0x01; /* Query VPD */
246 cdb
[2] = 0x83; /* Device Identifier */
247 cdb
[3] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN
>> 8) & 0xff;
248 cdb
[4] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN
& 0xff);
250 ret
= scsi_execute_req(sdev
, cdb
, DMA_FROM_DEVICE
, buf
,
251 INQUIRY_VPD_DEVICE_IDENTIFIER_LEN
,
256 page_len
= (buf
[2] << 8) | buf
[3];
257 while (page_len
> 0) {
258 /* Grab a pointer to the Identification descriptor */
260 ident_len
= page_83
[3];
262 pr_err("page_83[3]: identifier"
266 pr_debug("T10 VPD Identifer Length: %d\n", ident_len
);
268 vpd
= kzalloc(sizeof(struct t10_vpd
), GFP_KERNEL
);
270 pr_err("Unable to allocate memory for"
271 " struct t10_vpd\n");
274 INIT_LIST_HEAD(&vpd
->vpd_list
);
276 transport_set_vpd_proto_id(vpd
, page_83
);
277 transport_set_vpd_assoc(vpd
, page_83
);
279 if (transport_set_vpd_ident_type(vpd
, page_83
) < 0) {
280 off
+= (ident_len
+ 4);
281 page_len
-= (ident_len
+ 4);
285 if (transport_set_vpd_ident(vpd
, page_83
) < 0) {
286 off
+= (ident_len
+ 4);
287 page_len
-= (ident_len
+ 4);
292 list_add_tail(&vpd
->vpd_list
, &wwn
->t10_vpd_list
);
293 off
+= (ident_len
+ 4);
294 page_len
-= (ident_len
+ 4);
301 /* pscsi_add_device_to_list():
305 static struct se_device
*pscsi_add_device_to_list(
307 struct se_subsystem_dev
*se_dev
,
308 struct pscsi_dev_virt
*pdv
,
309 struct scsi_device
*sd
,
312 struct se_device
*dev
;
313 struct se_dev_limits dev_limits
;
314 struct request_queue
*q
;
315 struct queue_limits
*limits
;
317 memset(&dev_limits
, 0, sizeof(struct se_dev_limits
));
319 if (!sd
->queue_depth
) {
320 sd
->queue_depth
= PSCSI_DEFAULT_QUEUEDEPTH
;
322 pr_err("Set broken SCSI Device %d:%d:%d"
323 " queue_depth to %d\n", sd
->channel
, sd
->id
,
324 sd
->lun
, sd
->queue_depth
);
327 * Setup the local scope queue_limits from struct request_queue->limits
328 * to pass into transport_add_device_to_core_hba() as struct se_dev_limits.
330 q
= sd
->request_queue
;
331 limits
= &dev_limits
.limits
;
332 limits
->logical_block_size
= sd
->sector_size
;
333 limits
->max_hw_sectors
= min_t(int, sd
->host
->max_sectors
, queue_max_hw_sectors(q
));
334 limits
->max_sectors
= min_t(int, sd
->host
->max_sectors
, queue_max_sectors(q
));
335 dev_limits
.hw_queue_depth
= sd
->queue_depth
;
336 dev_limits
.queue_depth
= sd
->queue_depth
;
338 * Setup our standard INQUIRY info into se_dev->t10_wwn
340 pscsi_set_inquiry_info(sd
, &se_dev
->t10_wwn
);
343 * Set the pointer pdv->pdv_sd to from passed struct scsi_device,
344 * which has already been referenced with Linux SCSI code with
345 * scsi_device_get() in this file's pscsi_create_virtdevice().
347 * The passthrough operations called by the transport_add_device_*
348 * function below will require this pointer to be set for passthroug
351 * For the shutdown case in pscsi_free_device(), this struct
352 * scsi_device reference is released with Linux SCSI code
353 * scsi_device_put() and the pdv->pdv_sd cleared.
356 dev
= transport_add_device_to_core_hba(hba
, &pscsi_template
,
357 se_dev
, dev_flags
, pdv
,
358 &dev_limits
, NULL
, NULL
);
365 * Locate VPD WWN Information used for various purposes within
366 * the Storage Engine.
368 if (!pscsi_get_inquiry_vpd_serial(sd
, &se_dev
->t10_wwn
)) {
370 * If VPD Unit Serial returned GOOD status, try
371 * VPD Device Identification page (0x83).
373 pscsi_get_inquiry_vpd_device_ident(sd
, &se_dev
->t10_wwn
);
377 * For TYPE_TAPE, attempt to determine blocksize with MODE_SENSE.
379 if (sd
->type
== TYPE_TAPE
)
380 pscsi_tape_read_blocksize(dev
, sd
);
384 static void *pscsi_allocate_virtdevice(struct se_hba
*hba
, const char *name
)
386 struct pscsi_dev_virt
*pdv
;
388 pdv
= kzalloc(sizeof(struct pscsi_dev_virt
), GFP_KERNEL
);
390 pr_err("Unable to allocate memory for struct pscsi_dev_virt\n");
393 pdv
->pdv_se_hba
= hba
;
395 pr_debug("PSCSI: Allocated pdv: %p for %s\n", pdv
, name
);
400 * Called with struct Scsi_Host->host_lock called.
402 static struct se_device
*pscsi_create_type_disk(
403 struct scsi_device
*sd
,
404 struct pscsi_dev_virt
*pdv
,
405 struct se_subsystem_dev
*se_dev
,
407 __releases(sh
->host_lock
)
409 struct se_device
*dev
;
410 struct pscsi_hba_virt
*phv
= pdv
->pdv_se_hba
->hba_ptr
;
411 struct Scsi_Host
*sh
= sd
->host
;
412 struct block_device
*bd
;
415 if (scsi_device_get(sd
)) {
416 pr_err("scsi_device_get() failed for %d:%d:%d:%d\n",
417 sh
->host_no
, sd
->channel
, sd
->id
, sd
->lun
);
418 spin_unlock_irq(sh
->host_lock
);
421 spin_unlock_irq(sh
->host_lock
);
423 * Claim exclusive struct block_device access to struct scsi_device
424 * for TYPE_DISK using supplied udev_path
426 bd
= blkdev_get_by_path(se_dev
->se_dev_udev_path
,
427 FMODE_WRITE
|FMODE_READ
|FMODE_EXCL
, pdv
);
429 pr_err("pSCSI: blkdev_get_by_path() failed\n");
435 dev
= pscsi_add_device_to_list(hba
, se_dev
, pdv
, sd
, dev_flags
);
437 blkdev_put(pdv
->pdv_bd
, FMODE_WRITE
|FMODE_READ
|FMODE_EXCL
);
441 pr_debug("CORE_PSCSI[%d] - Added TYPE_DISK for %d:%d:%d:%d\n",
442 phv
->phv_host_id
, sh
->host_no
, sd
->channel
, sd
->id
, sd
->lun
);
448 * Called with struct Scsi_Host->host_lock called.
450 static struct se_device
*pscsi_create_type_rom(
451 struct scsi_device
*sd
,
452 struct pscsi_dev_virt
*pdv
,
453 struct se_subsystem_dev
*se_dev
,
455 __releases(sh
->host_lock
)
457 struct se_device
*dev
;
458 struct pscsi_hba_virt
*phv
= pdv
->pdv_se_hba
->hba_ptr
;
459 struct Scsi_Host
*sh
= sd
->host
;
462 if (scsi_device_get(sd
)) {
463 pr_err("scsi_device_get() failed for %d:%d:%d:%d\n",
464 sh
->host_no
, sd
->channel
, sd
->id
, sd
->lun
);
465 spin_unlock_irq(sh
->host_lock
);
468 spin_unlock_irq(sh
->host_lock
);
470 dev
= pscsi_add_device_to_list(hba
, se_dev
, pdv
, sd
, dev_flags
);
475 pr_debug("CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%d\n",
476 phv
->phv_host_id
, scsi_device_type(sd
->type
), sh
->host_no
,
477 sd
->channel
, sd
->id
, sd
->lun
);
483 *Called with struct Scsi_Host->host_lock called.
485 static struct se_device
*pscsi_create_type_other(
486 struct scsi_device
*sd
,
487 struct pscsi_dev_virt
*pdv
,
488 struct se_subsystem_dev
*se_dev
,
490 __releases(sh
->host_lock
)
492 struct se_device
*dev
;
493 struct pscsi_hba_virt
*phv
= pdv
->pdv_se_hba
->hba_ptr
;
494 struct Scsi_Host
*sh
= sd
->host
;
497 spin_unlock_irq(sh
->host_lock
);
498 dev
= pscsi_add_device_to_list(hba
, se_dev
, pdv
, sd
, dev_flags
);
502 pr_debug("CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%d\n",
503 phv
->phv_host_id
, scsi_device_type(sd
->type
), sh
->host_no
,
504 sd
->channel
, sd
->id
, sd
->lun
);
509 static struct se_device
*pscsi_create_virtdevice(
511 struct se_subsystem_dev
*se_dev
,
514 struct pscsi_dev_virt
*pdv
= p
;
515 struct se_device
*dev
;
516 struct scsi_device
*sd
;
517 struct pscsi_hba_virt
*phv
= hba
->hba_ptr
;
518 struct Scsi_Host
*sh
= phv
->phv_lld_host
;
519 int legacy_mode_enable
= 0;
522 pr_err("Unable to locate struct pscsi_dev_virt"
524 return ERR_PTR(-EINVAL
);
527 * If not running in PHV_LLD_SCSI_HOST_NO mode, locate the
528 * struct Scsi_Host we will need to bring the TCM/pSCSI object online
531 if (phv
->phv_mode
== PHV_LLD_SCSI_HOST_NO
) {
532 pr_err("pSCSI: Unable to locate struct"
533 " Scsi_Host for PHV_LLD_SCSI_HOST_NO\n");
534 return ERR_PTR(-ENODEV
);
537 * For the newer PHV_VIRTUAL_HOST_ID struct scsi_device
538 * reference, we enforce that udev_path has been set
540 if (!(se_dev
->su_dev_flags
& SDF_USING_UDEV_PATH
)) {
541 pr_err("pSCSI: udev_path attribute has not"
542 " been set before ENABLE=1\n");
543 return ERR_PTR(-EINVAL
);
546 * If no scsi_host_id= was passed for PHV_VIRTUAL_HOST_ID,
547 * use the original TCM hba ID to reference Linux/SCSI Host No
548 * and enable for PHV_LLD_SCSI_HOST_NO mode.
550 if (!(pdv
->pdv_flags
& PDF_HAS_VIRT_HOST_ID
)) {
551 spin_lock(&hba
->device_lock
);
552 if (!list_empty(&hba
->hba_dev_list
)) {
553 pr_err("pSCSI: Unable to set hba_mode"
554 " with active devices\n");
555 spin_unlock(&hba
->device_lock
);
556 return ERR_PTR(-EEXIST
);
558 spin_unlock(&hba
->device_lock
);
560 if (pscsi_pmode_enable_hba(hba
, 1) != 1)
561 return ERR_PTR(-ENODEV
);
563 legacy_mode_enable
= 1;
564 hba
->hba_flags
|= HBA_FLAGS_PSCSI_MODE
;
565 sh
= phv
->phv_lld_host
;
567 sh
= scsi_host_lookup(pdv
->pdv_host_id
);
569 pr_err("pSCSI: Unable to locate"
570 " pdv_host_id: %d\n", pdv
->pdv_host_id
);
575 if (phv
->phv_mode
== PHV_VIRTUAL_HOST_ID
) {
576 pr_err("pSCSI: PHV_VIRTUAL_HOST_ID set while"
577 " struct Scsi_Host exists\n");
578 return ERR_PTR(-EEXIST
);
582 spin_lock_irq(sh
->host_lock
);
583 list_for_each_entry(sd
, &sh
->__devices
, siblings
) {
584 if ((pdv
->pdv_channel_id
!= sd
->channel
) ||
585 (pdv
->pdv_target_id
!= sd
->id
) ||
586 (pdv
->pdv_lun_id
!= sd
->lun
))
589 * Functions will release the held struct scsi_host->host_lock
590 * before calling calling pscsi_add_device_to_list() to register
591 * struct scsi_device with target_core_mod.
595 dev
= pscsi_create_type_disk(sd
, pdv
, se_dev
, hba
);
598 dev
= pscsi_create_type_rom(sd
, pdv
, se_dev
, hba
);
601 dev
= pscsi_create_type_other(sd
, pdv
, se_dev
, hba
);
606 if (phv
->phv_mode
== PHV_VIRTUAL_HOST_ID
)
608 else if (legacy_mode_enable
) {
609 pscsi_pmode_enable_hba(hba
, 0);
610 hba
->hba_flags
&= ~HBA_FLAGS_PSCSI_MODE
;
613 return ERR_PTR(-ENODEV
);
617 spin_unlock_irq(sh
->host_lock
);
619 pr_err("pSCSI: Unable to locate %d:%d:%d:%d\n", sh
->host_no
,
620 pdv
->pdv_channel_id
, pdv
->pdv_target_id
, pdv
->pdv_lun_id
);
622 if (phv
->phv_mode
== PHV_VIRTUAL_HOST_ID
)
624 else if (legacy_mode_enable
) {
625 pscsi_pmode_enable_hba(hba
, 0);
626 hba
->hba_flags
&= ~HBA_FLAGS_PSCSI_MODE
;
629 return ERR_PTR(-ENODEV
);
632 /* pscsi_free_device(): (Part of se_subsystem_api_t template)
636 static void pscsi_free_device(void *p
)
638 struct pscsi_dev_virt
*pdv
= p
;
639 struct pscsi_hba_virt
*phv
= pdv
->pdv_se_hba
->hba_ptr
;
640 struct scsi_device
*sd
= pdv
->pdv_sd
;
644 * Release exclusive pSCSI internal struct block_device claim for
645 * struct scsi_device with TYPE_DISK from pscsi_create_type_disk()
647 if ((sd
->type
== TYPE_DISK
) && pdv
->pdv_bd
) {
648 blkdev_put(pdv
->pdv_bd
,
649 FMODE_WRITE
|FMODE_READ
|FMODE_EXCL
);
653 * For HBA mode PHV_LLD_SCSI_HOST_NO, release the reference
654 * to struct Scsi_Host now.
656 if ((phv
->phv_mode
== PHV_LLD_SCSI_HOST_NO
) &&
657 (phv
->phv_lld_host
!= NULL
))
658 scsi_host_put(phv
->phv_lld_host
);
660 if ((sd
->type
== TYPE_DISK
) || (sd
->type
== TYPE_ROM
))
669 static int pscsi_transport_complete(struct se_cmd
*cmd
, struct scatterlist
*sg
)
671 struct pscsi_dev_virt
*pdv
= cmd
->se_dev
->dev_ptr
;
672 struct scsi_device
*sd
= pdv
->pdv_sd
;
674 struct pscsi_plugin_task
*pt
= cmd
->priv
;
675 unsigned char *cdb
= &pt
->pscsi_cdb
[0];
677 result
= pt
->pscsi_result
;
679 * Hack to make sure that Write-Protect modepage is set if R/O mode is
682 if (((cdb
[0] == MODE_SENSE
) || (cdb
[0] == MODE_SENSE_10
)) &&
683 (status_byte(result
) << 1) == SAM_STAT_GOOD
) {
685 goto after_mode_sense
;
687 if (cmd
->se_deve
->lun_flags
& TRANSPORT_LUNFLAGS_READ_ONLY
) {
688 unsigned char *buf
= transport_kmap_data_sg(cmd
);
690 if (cdb
[0] == MODE_SENSE_10
) {
691 if (!(buf
[3] & 0x80))
694 if (!(buf
[2] & 0x80))
698 transport_kunmap_data_sg(cmd
);
703 if (sd
->type
!= TYPE_TAPE
)
704 goto after_mode_select
;
707 * Hack to correctly obtain the initiator requested blocksize for
708 * TYPE_TAPE. Since this value is dependent upon each tape media,
709 * struct scsi_device->sector_size will not contain the correct value
710 * by default, so we go ahead and set it so
711 * TRANSPORT(dev)->get_blockdev() returns the correct value to the
714 if (((cdb
[0] == MODE_SELECT
) || (cdb
[0] == MODE_SELECT_10
)) &&
715 (status_byte(result
) << 1) == SAM_STAT_GOOD
) {
720 buf
= sg_virt(&sg
[0]);
722 pr_err("Unable to get buf for scatterlist\n");
723 goto after_mode_select
;
726 if (cdb
[0] == MODE_SELECT
)
729 bdl
= (buf
[6] << 8) | (buf
[7]);
732 goto after_mode_select
;
734 if (cdb
[0] == MODE_SELECT
)
735 blocksize
= (buf
[9] << 16) | (buf
[10] << 8) |
738 blocksize
= (buf
[13] << 16) | (buf
[14] << 8) |
741 sd
->sector_size
= blocksize
;
745 if (status_byte(result
) & CHECK_CONDITION
)
752 Opt_scsi_host_id
, Opt_scsi_channel_id
, Opt_scsi_target_id
,
753 Opt_scsi_lun_id
, Opt_err
756 static match_table_t tokens
= {
757 {Opt_scsi_host_id
, "scsi_host_id=%d"},
758 {Opt_scsi_channel_id
, "scsi_channel_id=%d"},
759 {Opt_scsi_target_id
, "scsi_target_id=%d"},
760 {Opt_scsi_lun_id
, "scsi_lun_id=%d"},
764 static ssize_t
pscsi_set_configfs_dev_params(struct se_hba
*hba
,
765 struct se_subsystem_dev
*se_dev
,
769 struct pscsi_dev_virt
*pdv
= se_dev
->se_dev_su_ptr
;
770 struct pscsi_hba_virt
*phv
= hba
->hba_ptr
;
771 char *orig
, *ptr
, *opts
;
772 substring_t args
[MAX_OPT_ARGS
];
773 int ret
= 0, arg
, token
;
775 opts
= kstrdup(page
, GFP_KERNEL
);
781 while ((ptr
= strsep(&opts
, ",\n")) != NULL
) {
785 token
= match_token(ptr
, tokens
, args
);
787 case Opt_scsi_host_id
:
788 if (phv
->phv_mode
== PHV_LLD_SCSI_HOST_NO
) {
789 pr_err("PSCSI[%d]: Unable to accept"
790 " scsi_host_id while phv_mode =="
791 " PHV_LLD_SCSI_HOST_NO\n",
796 match_int(args
, &arg
);
797 pdv
->pdv_host_id
= arg
;
798 pr_debug("PSCSI[%d]: Referencing SCSI Host ID:"
799 " %d\n", phv
->phv_host_id
, pdv
->pdv_host_id
);
800 pdv
->pdv_flags
|= PDF_HAS_VIRT_HOST_ID
;
802 case Opt_scsi_channel_id
:
803 match_int(args
, &arg
);
804 pdv
->pdv_channel_id
= arg
;
805 pr_debug("PSCSI[%d]: Referencing SCSI Channel"
806 " ID: %d\n", phv
->phv_host_id
,
807 pdv
->pdv_channel_id
);
808 pdv
->pdv_flags
|= PDF_HAS_CHANNEL_ID
;
810 case Opt_scsi_target_id
:
811 match_int(args
, &arg
);
812 pdv
->pdv_target_id
= arg
;
813 pr_debug("PSCSI[%d]: Referencing SCSI Target"
814 " ID: %d\n", phv
->phv_host_id
,
816 pdv
->pdv_flags
|= PDF_HAS_TARGET_ID
;
818 case Opt_scsi_lun_id
:
819 match_int(args
, &arg
);
820 pdv
->pdv_lun_id
= arg
;
821 pr_debug("PSCSI[%d]: Referencing SCSI LUN ID:"
822 " %d\n", phv
->phv_host_id
, pdv
->pdv_lun_id
);
823 pdv
->pdv_flags
|= PDF_HAS_LUN_ID
;
832 return (!ret
) ? count
: ret
;
835 static ssize_t
pscsi_check_configfs_dev_params(
837 struct se_subsystem_dev
*se_dev
)
839 struct pscsi_dev_virt
*pdv
= se_dev
->se_dev_su_ptr
;
841 if (!(pdv
->pdv_flags
& PDF_HAS_CHANNEL_ID
) ||
842 !(pdv
->pdv_flags
& PDF_HAS_TARGET_ID
) ||
843 !(pdv
->pdv_flags
& PDF_HAS_LUN_ID
)) {
844 pr_err("Missing scsi_channel_id=, scsi_target_id= and"
845 " scsi_lun_id= parameters\n");
852 static ssize_t
pscsi_show_configfs_dev_params(struct se_hba
*hba
,
853 struct se_subsystem_dev
*se_dev
,
856 struct pscsi_hba_virt
*phv
= hba
->hba_ptr
;
857 struct pscsi_dev_virt
*pdv
= se_dev
->se_dev_su_ptr
;
858 struct scsi_device
*sd
= pdv
->pdv_sd
;
859 unsigned char host_id
[16];
863 if (phv
->phv_mode
== PHV_VIRTUAL_HOST_ID
)
864 snprintf(host_id
, 16, "%d", pdv
->pdv_host_id
);
866 snprintf(host_id
, 16, "PHBA Mode");
868 bl
= sprintf(b
, "SCSI Device Bus Location:"
869 " Channel ID: %d Target ID: %d LUN: %d Host ID: %s\n",
870 pdv
->pdv_channel_id
, pdv
->pdv_target_id
, pdv
->pdv_lun_id
,
874 bl
+= sprintf(b
+ bl
, " ");
875 bl
+= sprintf(b
+ bl
, "Vendor: ");
876 for (i
= 0; i
< 8; i
++) {
877 if (ISPRINT(sd
->vendor
[i
])) /* printable character? */
878 bl
+= sprintf(b
+ bl
, "%c", sd
->vendor
[i
]);
880 bl
+= sprintf(b
+ bl
, " ");
882 bl
+= sprintf(b
+ bl
, " Model: ");
883 for (i
= 0; i
< 16; i
++) {
884 if (ISPRINT(sd
->model
[i
])) /* printable character ? */
885 bl
+= sprintf(b
+ bl
, "%c", sd
->model
[i
]);
887 bl
+= sprintf(b
+ bl
, " ");
889 bl
+= sprintf(b
+ bl
, " Rev: ");
890 for (i
= 0; i
< 4; i
++) {
891 if (ISPRINT(sd
->rev
[i
])) /* printable character ? */
892 bl
+= sprintf(b
+ bl
, "%c", sd
->rev
[i
]);
894 bl
+= sprintf(b
+ bl
, " ");
896 bl
+= sprintf(b
+ bl
, "\n");
901 static void pscsi_bi_endio(struct bio
*bio
, int error
)
906 static inline struct bio
*pscsi_get_bio(int sg_num
)
910 * Use bio_malloc() following the comment in for bio -> struct request
911 * in block/blk-core.c:blk_make_request()
913 bio
= bio_kmalloc(GFP_KERNEL
, sg_num
);
915 pr_err("PSCSI: bio_kmalloc() failed\n");
918 bio
->bi_end_io
= pscsi_bi_endio
;
923 static int pscsi_map_sg(struct se_cmd
*cmd
, struct scatterlist
*sgl
,
924 u32 sgl_nents
, enum dma_data_direction data_direction
,
927 struct pscsi_dev_virt
*pdv
= cmd
->se_dev
->dev_ptr
;
928 struct bio
*bio
= NULL
, *tbio
= NULL
;
930 struct scatterlist
*sg
;
931 u32 data_len
= cmd
->data_length
, i
, len
, bytes
, off
;
932 int nr_pages
= (cmd
->data_length
+ sgl
[0].offset
+
933 PAGE_SIZE
- 1) >> PAGE_SHIFT
;
935 int rw
= (data_direction
== DMA_TO_DEVICE
);
939 pr_debug("PSCSI: nr_pages: %d\n", nr_pages
);
941 for_each_sg(sgl
, sg
, sgl_nents
, i
) {
946 pr_debug("PSCSI: i: %d page: %p len: %d off: %d\n", i
,
949 while (len
> 0 && data_len
> 0) {
950 bytes
= min_t(unsigned int, len
, PAGE_SIZE
- off
);
951 bytes
= min(bytes
, data_len
);
954 nr_vecs
= min_t(int, BIO_MAX_PAGES
, nr_pages
);
957 * Calls bio_kmalloc() and sets bio->bi_end_io()
959 bio
= pscsi_get_bio(nr_vecs
);
964 bio
->bi_rw
|= REQ_WRITE
;
966 pr_debug("PSCSI: Allocated bio: %p,"
967 " dir: %s nr_vecs: %d\n", bio
,
968 (rw
) ? "rw" : "r", nr_vecs
);
970 * Set *hbio pointer to handle the case:
971 * nr_pages > BIO_MAX_PAGES, where additional
972 * bios need to be added to complete a given
978 tbio
= tbio
->bi_next
= bio
;
981 pr_debug("PSCSI: Calling bio_add_pc_page() i: %d"
982 " bio: %p page: %p len: %d off: %d\n", i
, bio
,
985 rc
= bio_add_pc_page(pdv
->pdv_sd
->request_queue
,
986 bio
, page
, bytes
, off
);
990 pr_debug("PSCSI: bio->bi_vcnt: %d nr_vecs: %d\n",
991 bio
->bi_vcnt
, nr_vecs
);
993 if (bio
->bi_vcnt
> nr_vecs
) {
994 pr_debug("PSCSI: Reached bio->bi_vcnt max:"
995 " %d i: %d bio: %p, allocating another"
996 " bio\n", bio
->bi_vcnt
, i
, bio
);
998 * Clear the pointer so that another bio will
999 * be allocated with pscsi_get_bio() above, the
1000 * current bio has already been set *tbio and
1017 *hbio
= (*hbio
)->bi_next
;
1018 bio
->bi_next
= NULL
;
1019 bio_endio(bio
, 0); /* XXX: should be error */
1021 cmd
->scsi_sense_reason
= TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE
;
1025 static inline u32
pscsi_get_sectors_6(
1030 struct se_device
*dev
= cmd
->se_dev
;
1033 * Assume TYPE_DISK for non struct se_device objects.
1034 * Use 8-bit sector value.
1040 * Use 24-bit allocation length for TYPE_TAPE.
1042 if (dev
->transport
->get_device_type(dev
) == TYPE_TAPE
)
1043 return (u32
)(cdb
[2] << 16) + (cdb
[3] << 8) + cdb
[4];
1046 * Everything else assume TYPE_DISK Sector CDB location.
1047 * Use 8-bit sector value. SBC-3 says:
1049 * A TRANSFER LENGTH field set to zero specifies that 256
1050 * logical blocks shall be written. Any other value
1051 * specifies the number of logical blocks that shall be
1055 return cdb
[4] ? : 256;
1058 static inline u32
pscsi_get_sectors_10(
1063 struct se_device
*dev
= cmd
->se_dev
;
1066 * Assume TYPE_DISK for non struct se_device objects.
1067 * Use 16-bit sector value.
1073 * XXX_10 is not defined in SSC, throw an exception
1075 if (dev
->transport
->get_device_type(dev
) == TYPE_TAPE
) {
1081 * Everything else assume TYPE_DISK Sector CDB location.
1082 * Use 16-bit sector value.
1085 return (u32
)(cdb
[7] << 8) + cdb
[8];
1088 static inline u32
pscsi_get_sectors_12(
1093 struct se_device
*dev
= cmd
->se_dev
;
1096 * Assume TYPE_DISK for non struct se_device objects.
1097 * Use 32-bit sector value.
1103 * XXX_12 is not defined in SSC, throw an exception
1105 if (dev
->transport
->get_device_type(dev
) == TYPE_TAPE
) {
1111 * Everything else assume TYPE_DISK Sector CDB location.
1112 * Use 32-bit sector value.
1115 return (u32
)(cdb
[6] << 24) + (cdb
[7] << 16) + (cdb
[8] << 8) + cdb
[9];
1118 static inline u32
pscsi_get_sectors_16(
1123 struct se_device
*dev
= cmd
->se_dev
;
1126 * Assume TYPE_DISK for non struct se_device objects.
1127 * Use 32-bit sector value.
1133 * Use 24-bit allocation length for TYPE_TAPE.
1135 if (dev
->transport
->get_device_type(dev
) == TYPE_TAPE
)
1136 return (u32
)(cdb
[12] << 16) + (cdb
[13] << 8) + cdb
[14];
1139 return (u32
)(cdb
[10] << 24) + (cdb
[11] << 16) +
1140 (cdb
[12] << 8) + cdb
[13];
1144 * Used for VARIABLE_LENGTH_CDB WRITE_32 and READ_32 variants
1146 static inline u32
pscsi_get_sectors_32(
1152 * Assume TYPE_DISK for non struct se_device objects.
1153 * Use 32-bit sector value.
1155 return (u32
)(cdb
[28] << 24) + (cdb
[29] << 16) +
1156 (cdb
[30] << 8) + cdb
[31];
1160 static inline u32
pscsi_get_lba_21(unsigned char *cdb
)
1162 return ((cdb
[1] & 0x1f) << 16) | (cdb
[2] << 8) | cdb
[3];
1165 static inline u32
pscsi_get_lba_32(unsigned char *cdb
)
1167 return (cdb
[2] << 24) | (cdb
[3] << 16) | (cdb
[4] << 8) | cdb
[5];
1170 static inline unsigned long long pscsi_get_lba_64(unsigned char *cdb
)
1172 unsigned int __v1
, __v2
;
1174 __v1
= (cdb
[2] << 24) | (cdb
[3] << 16) | (cdb
[4] << 8) | cdb
[5];
1175 __v2
= (cdb
[6] << 24) | (cdb
[7] << 16) | (cdb
[8] << 8) | cdb
[9];
1177 return ((unsigned long long)__v2
) | (unsigned long long)__v1
<< 32;
1181 * For VARIABLE_LENGTH_CDB w/ 32 byte extended CDBs
1183 static inline unsigned long long pscsi_get_lba_64_ext(unsigned char *cdb
)
1185 unsigned int __v1
, __v2
;
1187 __v1
= (cdb
[12] << 24) | (cdb
[13] << 16) | (cdb
[14] << 8) | cdb
[15];
1188 __v2
= (cdb
[16] << 24) | (cdb
[17] << 16) | (cdb
[18] << 8) | cdb
[19];
1190 return ((unsigned long long)__v2
) | (unsigned long long)__v1
<< 32;
1194 static inline u32
pscsi_get_size(
1199 struct se_device
*dev
= cmd
->se_dev
;
1201 if (dev
->transport
->get_device_type(dev
) == TYPE_TAPE
) {
1202 if (cdb
[1] & 1) { /* sectors */
1203 return dev
->se_sub_dev
->se_dev_attrib
.block_size
* sectors
;
1208 pr_debug("Returning block_size: %u, sectors: %u == %u for"
1209 " %s object\n", dev
->se_sub_dev
->se_dev_attrib
.block_size
,
1210 sectors
, dev
->se_sub_dev
->se_dev_attrib
.block_size
* sectors
,
1211 dev
->transport
->name
);
1213 return dev
->se_sub_dev
->se_dev_attrib
.block_size
* sectors
;
1216 static int pscsi_parse_cdb(struct se_cmd
*cmd
, unsigned int *size
)
1218 struct se_device
*dev
= cmd
->se_dev
;
1219 struct se_subsystem_dev
*su_dev
= dev
->se_sub_dev
;
1220 unsigned char *cdb
= cmd
->t_task_cdb
;
1226 if (cmd
->se_cmd_flags
& SCF_BIDI
)
1227 goto out_unsupported_cdb
;
1231 sectors
= pscsi_get_sectors_6(cdb
, cmd
, §or_ret
);
1233 goto out_unsupported_cdb
;
1234 *size
= pscsi_get_size(sectors
, cdb
, cmd
);
1235 cmd
->t_task_lba
= pscsi_get_lba_21(cdb
);
1236 cmd
->se_cmd_flags
|= SCF_SCSI_DATA_CDB
;
1239 sectors
= pscsi_get_sectors_10(cdb
, cmd
, §or_ret
);
1241 goto out_unsupported_cdb
;
1242 *size
= pscsi_get_size(sectors
, cdb
, cmd
);
1243 cmd
->t_task_lba
= pscsi_get_lba_32(cdb
);
1244 cmd
->se_cmd_flags
|= SCF_SCSI_DATA_CDB
;
1247 sectors
= pscsi_get_sectors_12(cdb
, cmd
, §or_ret
);
1249 goto out_unsupported_cdb
;
1250 *size
= pscsi_get_size(sectors
, cdb
, cmd
);
1251 cmd
->t_task_lba
= pscsi_get_lba_32(cdb
);
1252 cmd
->se_cmd_flags
|= SCF_SCSI_DATA_CDB
;
1255 sectors
= pscsi_get_sectors_16(cdb
, cmd
, §or_ret
);
1257 goto out_unsupported_cdb
;
1258 *size
= pscsi_get_size(sectors
, cdb
, cmd
);
1259 cmd
->t_task_lba
= pscsi_get_lba_64(cdb
);
1260 cmd
->se_cmd_flags
|= SCF_SCSI_DATA_CDB
;
1263 sectors
= pscsi_get_sectors_6(cdb
, cmd
, §or_ret
);
1265 goto out_unsupported_cdb
;
1266 *size
= pscsi_get_size(sectors
, cdb
, cmd
);
1267 cmd
->t_task_lba
= pscsi_get_lba_21(cdb
);
1268 cmd
->se_cmd_flags
|= SCF_SCSI_DATA_CDB
;
1272 sectors
= pscsi_get_sectors_10(cdb
, cmd
, §or_ret
);
1274 goto out_unsupported_cdb
;
1275 *size
= pscsi_get_size(sectors
, cdb
, cmd
);
1276 cmd
->t_task_lba
= pscsi_get_lba_32(cdb
);
1278 cmd
->se_cmd_flags
|= SCF_FUA
;
1279 cmd
->se_cmd_flags
|= SCF_SCSI_DATA_CDB
;
1282 sectors
= pscsi_get_sectors_12(cdb
, cmd
, §or_ret
);
1284 goto out_unsupported_cdb
;
1285 *size
= pscsi_get_size(sectors
, cdb
, cmd
);
1286 cmd
->t_task_lba
= pscsi_get_lba_32(cdb
);
1288 cmd
->se_cmd_flags
|= SCF_FUA
;
1289 cmd
->se_cmd_flags
|= SCF_SCSI_DATA_CDB
;
1292 sectors
= pscsi_get_sectors_16(cdb
, cmd
, §or_ret
);
1294 goto out_unsupported_cdb
;
1295 *size
= pscsi_get_size(sectors
, cdb
, cmd
);
1296 cmd
->t_task_lba
= pscsi_get_lba_64(cdb
);
1298 cmd
->se_cmd_flags
|= SCF_FUA
;
1299 cmd
->se_cmd_flags
|= SCF_SCSI_DATA_CDB
;
1301 case VARIABLE_LENGTH_CMD
:
1302 service_action
= get_unaligned_be16(&cdb
[8]);
1303 switch (service_action
) {
1305 sectors
= pscsi_get_sectors_32(cdb
, cmd
, §or_ret
);
1307 goto out_unsupported_cdb
;
1310 pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not"
1312 goto out_invalid_cdb_field
;
1315 *size
= pscsi_get_size(1, cdb
, cmd
);
1316 cmd
->t_task_lba
= get_unaligned_be64(&cdb
[12]);
1319 pr_err("VARIABLE_LENGTH_CMD service action"
1320 " 0x%04x not supported\n", service_action
);
1321 goto out_unsupported_cdb
;
1324 case GPCMD_READ_BUFFER_CAPACITY
:
1325 case GPCMD_SEND_OPC
:
1326 *size
= (cdb
[7] << 8) + cdb
[8];
1328 case READ_BLOCK_LIMITS
:
1329 *size
= READ_BLOCK_LEN
;
1331 case GPCMD_GET_CONFIGURATION
:
1332 case GPCMD_READ_FORMAT_CAPACITIES
:
1333 case GPCMD_READ_DISC_INFO
:
1334 case GPCMD_READ_TRACK_RZONE_INFO
:
1335 *size
= (cdb
[7] << 8) + cdb
[8];
1337 case GPCMD_MECHANISM_STATUS
:
1338 case GPCMD_READ_DVD_STRUCTURE
:
1339 *size
= (cdb
[8] << 8) + cdb
[9];
1342 *size
= READ_POSITION_LEN
;
1345 *size
= (cdb
[6] << 16) + (cdb
[7] << 8) + cdb
[8];
1348 *size
= READ_CAP_LEN
;
1350 case READ_MEDIA_SERIAL_NUMBER
:
1351 case SERVICE_ACTION_IN
:
1352 case ACCESS_CONTROL_IN
:
1353 case ACCESS_CONTROL_OUT
:
1354 *size
= (cdb
[10] << 24) | (cdb
[11] << 16) |
1355 (cdb
[12] << 8) | cdb
[13];
1360 case READ_ELEMENT_STATUS
:
1361 *size
= 65536 * cdb
[7] + 256 * cdb
[8] + cdb
[9];
1363 case SYNCHRONIZE_CACHE
:
1364 case SYNCHRONIZE_CACHE_16
:
1366 * Extract LBA and range to be flushed for emulated SYNCHRONIZE_CACHE
1368 if (cdb
[0] == SYNCHRONIZE_CACHE
) {
1369 sectors
= pscsi_get_sectors_10(cdb
, cmd
, §or_ret
);
1370 cmd
->t_task_lba
= pscsi_get_lba_32(cdb
);
1372 sectors
= pscsi_get_sectors_16(cdb
, cmd
, §or_ret
);
1373 cmd
->t_task_lba
= pscsi_get_lba_64(cdb
);
1376 goto out_unsupported_cdb
;
1378 *size
= pscsi_get_size(sectors
, cdb
, cmd
);
1381 *size
= get_unaligned_be16(&cdb
[7]);
1384 sectors
= pscsi_get_sectors_16(cdb
, cmd
, §or_ret
);
1386 goto out_unsupported_cdb
;
1389 pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not supported\n");
1390 goto out_invalid_cdb_field
;
1393 *size
= pscsi_get_size(1, cdb
, cmd
);
1394 cmd
->t_task_lba
= get_unaligned_be64(&cdb
[2]);
1397 sectors
= pscsi_get_sectors_10(cdb
, cmd
, §or_ret
);
1399 goto out_unsupported_cdb
;
1402 pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not supported\n");
1403 goto out_invalid_cdb_field
;
1406 *size
= pscsi_get_size(1, cdb
, cmd
);
1407 cmd
->t_task_lba
= get_unaligned_be32(&cdb
[2]);
1409 case ALLOW_MEDIUM_REMOVAL
:
1416 case WRITE_FILEMARKS
:
1417 case GPCMD_CLOSE_TRACK
:
1418 case INITIALIZE_ELEMENT_STATUS
:
1419 case GPCMD_LOAD_UNLOAD
:
1420 case GPCMD_SET_SPEED
:
1424 case GET_EVENT_STATUS_NOTIFICATION
:
1425 *size
= (cdb
[7] << 8) | cdb
[8];
1428 switch (cdb
[2] & 0x3) { /* T_LENGTH */
1433 sectors
= (((cdb
[1] & 0x1) ? cdb
[3] : 0) << 8) | cdb
[4];
1436 sectors
= (((cdb
[1] & 0x1) ? cdb
[5] : 0) << 8) | cdb
[6];
1439 pr_err("T_LENGTH=0x3 not supported for ATA_16\n");
1440 goto out_invalid_cdb_field
;
1445 /* BLOCK T_TYPE: 512 or sector */
1446 *size
= sectors
* ((cdb
[2] & 0x10) ?
1447 dev
->se_sub_dev
->se_dev_attrib
.block_size
: 512);
1454 ret
= spc_parse_cdb(cmd
, size
, true);
1459 if (cmd
->se_cmd_flags
& SCF_SCSI_DATA_CDB
) {
1460 if (sectors
> su_dev
->se_dev_attrib
.fabric_max_sectors
) {
1461 printk_ratelimited(KERN_ERR
"SCSI OP %02xh with too"
1462 " big sectors %u exceeds fabric_max_sectors:"
1463 " %u\n", cdb
[0], sectors
,
1464 su_dev
->se_dev_attrib
.fabric_max_sectors
);
1465 goto out_invalid_cdb_field
;
1467 if (sectors
> su_dev
->se_dev_attrib
.hw_max_sectors
) {
1468 printk_ratelimited(KERN_ERR
"SCSI OP %02xh with too"
1469 " big sectors %u exceeds backend hw_max_sectors:"
1470 " %u\n", cdb
[0], sectors
,
1471 su_dev
->se_dev_attrib
.hw_max_sectors
);
1472 goto out_invalid_cdb_field
;
1478 out_unsupported_cdb
:
1479 cmd
->se_cmd_flags
|= SCF_SCSI_CDB_EXCEPTION
;
1480 cmd
->scsi_sense_reason
= TCM_UNSUPPORTED_SCSI_OPCODE
;
1482 out_invalid_cdb_field
:
1483 cmd
->se_cmd_flags
|= SCF_SCSI_CDB_EXCEPTION
;
1484 cmd
->scsi_sense_reason
= TCM_INVALID_CDB_FIELD
;
1489 static int pscsi_execute_cmd(struct se_cmd
*cmd
, struct scatterlist
*sgl
,
1490 u32 sgl_nents
, enum dma_data_direction data_direction
)
1492 struct pscsi_dev_virt
*pdv
= cmd
->se_dev
->dev_ptr
;
1493 struct pscsi_plugin_task
*pt
;
1494 struct request
*req
;
1499 * Dynamically alloc cdb space, since it may be larger than
1500 * TCM_MAX_COMMAND_SIZE
1502 pt
= kzalloc(sizeof(*pt
) + scsi_command_size(cmd
->t_task_cdb
), GFP_KERNEL
);
1504 cmd
->scsi_sense_reason
= TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE
;
1509 memcpy(pt
->pscsi_cdb
, cmd
->t_task_cdb
,
1510 scsi_command_size(cmd
->t_task_cdb
));
1513 req
= blk_get_request(pdv
->pdv_sd
->request_queue
,
1514 (data_direction
== DMA_TO_DEVICE
),
1516 if (!req
|| IS_ERR(req
)) {
1517 pr_err("PSCSI: blk_get_request() failed: %ld\n",
1518 req
? IS_ERR(req
) : -ENOMEM
);
1519 cmd
->scsi_sense_reason
=
1520 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE
;
1524 BUG_ON(!cmd
->data_length
);
1526 ret
= pscsi_map_sg(cmd
, sgl
, sgl_nents
, data_direction
, &hbio
);
1528 cmd
->scsi_sense_reason
=
1529 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE
;
1533 req
= blk_make_request(pdv
->pdv_sd
->request_queue
, hbio
,
1536 pr_err("pSCSI: blk_make_request() failed\n");
1541 req
->cmd_type
= REQ_TYPE_BLOCK_PC
;
1542 req
->end_io
= pscsi_req_done
;
1543 req
->end_io_data
= cmd
;
1544 req
->cmd_len
= scsi_command_size(pt
->pscsi_cdb
);
1545 req
->cmd
= &pt
->pscsi_cdb
[0];
1546 req
->sense
= &pt
->pscsi_sense
[0];
1548 if (pdv
->pdv_sd
->type
== TYPE_DISK
)
1549 req
->timeout
= PS_TIMEOUT_DISK
;
1551 req
->timeout
= PS_TIMEOUT_OTHER
;
1552 req
->retries
= PS_RETRY
;
1554 blk_execute_rq_nowait(pdv
->pdv_sd
->request_queue
, NULL
, req
,
1555 (cmd
->sam_task_attr
== MSG_HEAD_TAG
),
1562 struct bio
*bio
= hbio
;
1563 hbio
= hbio
->bi_next
;
1564 bio
->bi_next
= NULL
;
1565 bio_endio(bio
, 0); /* XXX: should be error */
1567 cmd
->scsi_sense_reason
= TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE
;
1573 static unsigned char *pscsi_get_sense_buffer(struct se_cmd
*cmd
)
1575 struct pscsi_plugin_task
*pt
= cmd
->priv
;
1577 return pt
->pscsi_sense
;
1580 /* pscsi_get_device_rev():
1584 static u32
pscsi_get_device_rev(struct se_device
*dev
)
1586 struct pscsi_dev_virt
*pdv
= dev
->dev_ptr
;
1587 struct scsi_device
*sd
= pdv
->pdv_sd
;
1589 return (sd
->scsi_level
- 1) ? sd
->scsi_level
- 1 : 1;
1592 /* pscsi_get_device_type():
1596 static u32
pscsi_get_device_type(struct se_device
*dev
)
1598 struct pscsi_dev_virt
*pdv
= dev
->dev_ptr
;
1599 struct scsi_device
*sd
= pdv
->pdv_sd
;
1604 static sector_t
pscsi_get_blocks(struct se_device
*dev
)
1606 struct pscsi_dev_virt
*pdv
= dev
->dev_ptr
;
1608 if (pdv
->pdv_bd
&& pdv
->pdv_bd
->bd_part
)
1609 return pdv
->pdv_bd
->bd_part
->nr_sects
;
1615 static void pscsi_req_done(struct request
*req
, int uptodate
)
1617 struct se_cmd
*cmd
= req
->end_io_data
;
1618 struct pscsi_plugin_task
*pt
= cmd
->priv
;
1620 pt
->pscsi_result
= req
->errors
;
1621 pt
->pscsi_resid
= req
->resid_len
;
1623 cmd
->scsi_status
= status_byte(pt
->pscsi_result
) << 1;
1624 if (cmd
->scsi_status
) {
1625 pr_debug("PSCSI Status Byte exception at cmd: %p CDB:"
1626 " 0x%02x Result: 0x%08x\n", cmd
, pt
->pscsi_cdb
[0],
1630 switch (host_byte(pt
->pscsi_result
)) {
1632 target_complete_cmd(cmd
, cmd
->scsi_status
);
1635 pr_debug("PSCSI Host Byte exception at cmd: %p CDB:"
1636 " 0x%02x Result: 0x%08x\n", cmd
, pt
->pscsi_cdb
[0],
1638 cmd
->scsi_sense_reason
= TCM_UNSUPPORTED_SCSI_OPCODE
;
1639 target_complete_cmd(cmd
, SAM_STAT_CHECK_CONDITION
);
1643 __blk_put_request(req
->q
, req
);
1647 static struct se_subsystem_api pscsi_template
= {
1649 .owner
= THIS_MODULE
,
1650 .transport_type
= TRANSPORT_PLUGIN_PHBA_PDEV
,
1651 .attach_hba
= pscsi_attach_hba
,
1652 .detach_hba
= pscsi_detach_hba
,
1653 .pmode_enable_hba
= pscsi_pmode_enable_hba
,
1654 .allocate_virtdevice
= pscsi_allocate_virtdevice
,
1655 .create_virtdevice
= pscsi_create_virtdevice
,
1656 .free_device
= pscsi_free_device
,
1657 .transport_complete
= pscsi_transport_complete
,
1658 .parse_cdb
= pscsi_parse_cdb
,
1659 .execute_cmd
= pscsi_execute_cmd
,
1660 .check_configfs_dev_params
= pscsi_check_configfs_dev_params
,
1661 .set_configfs_dev_params
= pscsi_set_configfs_dev_params
,
1662 .show_configfs_dev_params
= pscsi_show_configfs_dev_params
,
1663 .get_sense_buffer
= pscsi_get_sense_buffer
,
1664 .get_device_rev
= pscsi_get_device_rev
,
1665 .get_device_type
= pscsi_get_device_type
,
1666 .get_blocks
= pscsi_get_blocks
,
1669 static int __init
pscsi_module_init(void)
1671 return transport_subsystem_register(&pscsi_template
);
1674 static void pscsi_module_exit(void)
1676 transport_subsystem_release(&pscsi_template
);
1679 MODULE_DESCRIPTION("TCM PSCSI subsystem plugin");
1680 MODULE_AUTHOR("nab@Linux-iSCSI.org");
1681 MODULE_LICENSE("GPL");
1683 module_init(pscsi_module_init
);
1684 module_exit(pscsi_module_exit
);