2 * libata-scsi.c - helper library for ATA
4 * Maintained by: Tejun Heo <tj@kernel.org>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/driver-api/libata.rst
30 * Hardware documentation available from
31 * - http://www.t10.org/
32 * - http://www.t13.org/
36 #include <linux/slab.h>
37 #include <linux/kernel.h>
38 #include <linux/blkdev.h>
39 #include <linux/spinlock.h>
40 #include <linux/export.h>
41 #include <scsi/scsi.h>
42 #include <scsi/scsi_host.h>
43 #include <scsi/scsi_cmnd.h>
44 #include <scsi/scsi_eh.h>
45 #include <scsi/scsi_device.h>
46 #include <scsi/scsi_tcq.h>
47 #include <scsi/scsi_transport.h>
48 #include <linux/libata.h>
49 #include <linux/hdreg.h>
50 #include <linux/uaccess.h>
51 #include <linux/suspend.h>
52 #include <asm/unaligned.h>
53 #include <linux/ioprio.h>
56 #include "libata-transport.h"
58 #define ATA_SCSI_RBUF_SIZE 4096
60 static DEFINE_SPINLOCK(ata_scsi_rbuf_lock
);
61 static u8 ata_scsi_rbuf
[ATA_SCSI_RBUF_SIZE
];
63 typedef unsigned int (*ata_xlat_func_t
)(struct ata_queued_cmd
*qc
);
65 static struct ata_device
*__ata_scsi_find_dev(struct ata_port
*ap
,
66 const struct scsi_device
*scsidev
);
67 static struct ata_device
*ata_scsi_find_dev(struct ata_port
*ap
,
68 const struct scsi_device
*scsidev
);
70 #define RW_RECOVERY_MPAGE 0x1
71 #define RW_RECOVERY_MPAGE_LEN 12
72 #define CACHE_MPAGE 0x8
73 #define CACHE_MPAGE_LEN 20
74 #define CONTROL_MPAGE 0xa
75 #define CONTROL_MPAGE_LEN 12
76 #define ALL_MPAGES 0x3f
77 #define ALL_SUB_MPAGES 0xff
80 static const u8 def_rw_recovery_mpage
[RW_RECOVERY_MPAGE_LEN
] = {
82 RW_RECOVERY_MPAGE_LEN
- 2,
84 0, /* read retry count */
86 0, /* write retry count */
90 static const u8 def_cache_mpage
[CACHE_MPAGE_LEN
] = {
93 0, /* contains WCE, needs to be 0 for logic */
94 0, 0, 0, 0, 0, 0, 0, 0, 0,
95 0, /* contains DRA, needs to be 0 for logic */
99 static const u8 def_control_mpage
[CONTROL_MPAGE_LEN
] = {
101 CONTROL_MPAGE_LEN
- 2,
102 2, /* DSENSE=0, GLTSD=1 */
103 0, /* [QAM+QERR may be 1, see 05-359r1] */
104 0, 0, 0, 0, 0xff, 0xff,
105 0, 30 /* extended self test time, see 05-359r1 */
108 static const char *ata_lpm_policy_names
[] = {
109 [ATA_LPM_UNKNOWN
] = "max_performance",
110 [ATA_LPM_MAX_POWER
] = "max_performance",
111 [ATA_LPM_MED_POWER
] = "medium_power",
112 [ATA_LPM_MED_POWER_WITH_DIPM
] = "med_power_with_dipm",
113 [ATA_LPM_MIN_POWER
] = "min_power",
116 static ssize_t
ata_scsi_lpm_store(struct device
*device
,
117 struct device_attribute
*attr
,
118 const char *buf
, size_t count
)
120 struct Scsi_Host
*shost
= class_to_shost(device
);
121 struct ata_port
*ap
= ata_shost_to_port(shost
);
122 struct ata_link
*link
;
123 struct ata_device
*dev
;
124 enum ata_lpm_policy policy
;
127 /* UNKNOWN is internal state, iterate from MAX_POWER */
128 for (policy
= ATA_LPM_MAX_POWER
;
129 policy
< ARRAY_SIZE(ata_lpm_policy_names
); policy
++) {
130 const char *name
= ata_lpm_policy_names
[policy
];
132 if (strncmp(name
, buf
, strlen(name
)) == 0)
135 if (policy
== ARRAY_SIZE(ata_lpm_policy_names
))
138 spin_lock_irqsave(ap
->lock
, flags
);
140 ata_for_each_link(link
, ap
, EDGE
) {
141 ata_for_each_dev(dev
, &ap
->link
, ENABLED
) {
142 if (dev
->horkage
& ATA_HORKAGE_NOLPM
) {
149 ap
->target_lpm_policy
= policy
;
150 ata_port_schedule_eh(ap
);
152 spin_unlock_irqrestore(ap
->lock
, flags
);
156 static ssize_t
ata_scsi_lpm_show(struct device
*dev
,
157 struct device_attribute
*attr
, char *buf
)
159 struct Scsi_Host
*shost
= class_to_shost(dev
);
160 struct ata_port
*ap
= ata_shost_to_port(shost
);
162 if (ap
->target_lpm_policy
>= ARRAY_SIZE(ata_lpm_policy_names
))
165 return snprintf(buf
, PAGE_SIZE
, "%s\n",
166 ata_lpm_policy_names
[ap
->target_lpm_policy
]);
168 DEVICE_ATTR(link_power_management_policy
, S_IRUGO
| S_IWUSR
,
169 ata_scsi_lpm_show
, ata_scsi_lpm_store
);
170 EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy
);
172 static ssize_t
ata_scsi_park_show(struct device
*device
,
173 struct device_attribute
*attr
, char *buf
)
175 struct scsi_device
*sdev
= to_scsi_device(device
);
177 struct ata_link
*link
;
178 struct ata_device
*dev
;
180 unsigned int uninitialized_var(msecs
);
183 ap
= ata_shost_to_port(sdev
->host
);
185 spin_lock_irq(ap
->lock
);
186 dev
= ata_scsi_find_dev(ap
, sdev
);
191 if (dev
->flags
& ATA_DFLAG_NO_UNLOAD
) {
198 if (ap
->pflags
& ATA_PFLAG_EH_IN_PROGRESS
&&
199 link
->eh_context
.unloaded_mask
& (1 << dev
->devno
) &&
200 time_after(dev
->unpark_deadline
, now
))
201 msecs
= jiffies_to_msecs(dev
->unpark_deadline
- now
);
206 spin_unlock_irq(ap
->lock
);
208 return rc
? rc
: snprintf(buf
, 20, "%u\n", msecs
);
211 static ssize_t
ata_scsi_park_store(struct device
*device
,
212 struct device_attribute
*attr
,
213 const char *buf
, size_t len
)
215 struct scsi_device
*sdev
= to_scsi_device(device
);
217 struct ata_device
*dev
;
222 rc
= kstrtol(buf
, 10, &input
);
227 if (input
> ATA_TMOUT_MAX_PARK
) {
229 input
= ATA_TMOUT_MAX_PARK
;
232 ap
= ata_shost_to_port(sdev
->host
);
234 spin_lock_irqsave(ap
->lock
, flags
);
235 dev
= ata_scsi_find_dev(ap
, sdev
);
236 if (unlikely(!dev
)) {
240 if (dev
->class != ATA_DEV_ATA
&&
241 dev
->class != ATA_DEV_ZAC
) {
247 if (dev
->flags
& ATA_DFLAG_NO_UNLOAD
) {
252 dev
->unpark_deadline
= ata_deadline(jiffies
, input
);
253 dev
->link
->eh_info
.dev_action
[dev
->devno
] |= ATA_EH_PARK
;
254 ata_port_schedule_eh(ap
);
255 complete(&ap
->park_req_pending
);
259 dev
->flags
&= ~ATA_DFLAG_NO_UNLOAD
;
262 dev
->flags
|= ATA_DFLAG_NO_UNLOAD
;
267 spin_unlock_irqrestore(ap
->lock
, flags
);
269 return rc
? rc
: len
;
271 DEVICE_ATTR(unload_heads
, S_IRUGO
| S_IWUSR
,
272 ata_scsi_park_show
, ata_scsi_park_store
);
273 EXPORT_SYMBOL_GPL(dev_attr_unload_heads
);
275 static ssize_t
ata_ncq_prio_enable_show(struct device
*device
,
276 struct device_attribute
*attr
,
279 struct scsi_device
*sdev
= to_scsi_device(device
);
281 struct ata_device
*dev
;
282 bool ncq_prio_enable
;
285 ap
= ata_shost_to_port(sdev
->host
);
287 spin_lock_irq(ap
->lock
);
288 dev
= ata_scsi_find_dev(ap
, sdev
);
294 ncq_prio_enable
= dev
->flags
& ATA_DFLAG_NCQ_PRIO_ENABLE
;
297 spin_unlock_irq(ap
->lock
);
299 return rc
? rc
: snprintf(buf
, 20, "%u\n", ncq_prio_enable
);
302 static ssize_t
ata_ncq_prio_enable_store(struct device
*device
,
303 struct device_attribute
*attr
,
304 const char *buf
, size_t len
)
306 struct scsi_device
*sdev
= to_scsi_device(device
);
308 struct ata_device
*dev
;
312 rc
= kstrtol(buf
, 10, &input
);
315 if ((input
< 0) || (input
> 1))
318 ap
= ata_shost_to_port(sdev
->host
);
319 dev
= ata_scsi_find_dev(ap
, sdev
);
323 spin_lock_irq(ap
->lock
);
325 dev
->flags
|= ATA_DFLAG_NCQ_PRIO_ENABLE
;
327 dev
->flags
&= ~ATA_DFLAG_NCQ_PRIO_ENABLE
;
329 dev
->link
->eh_info
.action
|= ATA_EH_REVALIDATE
;
330 dev
->link
->eh_info
.flags
|= ATA_EHI_QUIET
;
331 ata_port_schedule_eh(ap
);
332 spin_unlock_irq(ap
->lock
);
334 ata_port_wait_eh(ap
);
337 spin_lock_irq(ap
->lock
);
338 if (!(dev
->flags
& ATA_DFLAG_NCQ_PRIO
)) {
339 dev
->flags
&= ~ATA_DFLAG_NCQ_PRIO_ENABLE
;
342 spin_unlock_irq(ap
->lock
);
345 return rc
? rc
: len
;
348 DEVICE_ATTR(ncq_prio_enable
, S_IRUGO
| S_IWUSR
,
349 ata_ncq_prio_enable_show
, ata_ncq_prio_enable_store
);
350 EXPORT_SYMBOL_GPL(dev_attr_ncq_prio_enable
);
352 void ata_scsi_set_sense(struct ata_device
*dev
, struct scsi_cmnd
*cmd
,
353 u8 sk
, u8 asc
, u8 ascq
)
355 bool d_sense
= (dev
->flags
& ATA_DFLAG_D_SENSE
);
360 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
362 scsi_build_sense_buffer(d_sense
, cmd
->sense_buffer
, sk
, asc
, ascq
);
365 void ata_scsi_set_sense_information(struct ata_device
*dev
,
366 struct scsi_cmnd
*cmd
,
367 const struct ata_taskfile
*tf
)
374 information
= ata_tf_read_block(tf
, dev
);
375 if (information
== U64_MAX
)
378 scsi_set_sense_information(cmd
->sense_buffer
,
379 SCSI_SENSE_BUFFERSIZE
, information
);
382 static void ata_scsi_set_invalid_field(struct ata_device
*dev
,
383 struct scsi_cmnd
*cmd
, u16 field
, u8 bit
)
385 ata_scsi_set_sense(dev
, cmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
386 /* "Invalid field in CDB" */
387 scsi_set_sense_field_pointer(cmd
->sense_buffer
, SCSI_SENSE_BUFFERSIZE
,
391 static void ata_scsi_set_invalid_parameter(struct ata_device
*dev
,
392 struct scsi_cmnd
*cmd
, u16 field
)
394 /* "Invalid field in parameter list" */
395 ata_scsi_set_sense(dev
, cmd
, ILLEGAL_REQUEST
, 0x26, 0x0);
396 scsi_set_sense_field_pointer(cmd
->sense_buffer
, SCSI_SENSE_BUFFERSIZE
,
401 ata_scsi_em_message_store(struct device
*dev
, struct device_attribute
*attr
,
402 const char *buf
, size_t count
)
404 struct Scsi_Host
*shost
= class_to_shost(dev
);
405 struct ata_port
*ap
= ata_shost_to_port(shost
);
406 if (ap
->ops
->em_store
&& (ap
->flags
& ATA_FLAG_EM
))
407 return ap
->ops
->em_store(ap
, buf
, count
);
412 ata_scsi_em_message_show(struct device
*dev
, struct device_attribute
*attr
,
415 struct Scsi_Host
*shost
= class_to_shost(dev
);
416 struct ata_port
*ap
= ata_shost_to_port(shost
);
418 if (ap
->ops
->em_show
&& (ap
->flags
& ATA_FLAG_EM
))
419 return ap
->ops
->em_show(ap
, buf
);
422 DEVICE_ATTR(em_message
, S_IRUGO
| S_IWUSR
,
423 ata_scsi_em_message_show
, ata_scsi_em_message_store
);
424 EXPORT_SYMBOL_GPL(dev_attr_em_message
);
427 ata_scsi_em_message_type_show(struct device
*dev
, struct device_attribute
*attr
,
430 struct Scsi_Host
*shost
= class_to_shost(dev
);
431 struct ata_port
*ap
= ata_shost_to_port(shost
);
433 return snprintf(buf
, 23, "%d\n", ap
->em_message_type
);
435 DEVICE_ATTR(em_message_type
, S_IRUGO
,
436 ata_scsi_em_message_type_show
, NULL
);
437 EXPORT_SYMBOL_GPL(dev_attr_em_message_type
);
440 ata_scsi_activity_show(struct device
*dev
, struct device_attribute
*attr
,
443 struct scsi_device
*sdev
= to_scsi_device(dev
);
444 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
445 struct ata_device
*atadev
= ata_scsi_find_dev(ap
, sdev
);
447 if (atadev
&& ap
->ops
->sw_activity_show
&&
448 (ap
->flags
& ATA_FLAG_SW_ACTIVITY
))
449 return ap
->ops
->sw_activity_show(atadev
, buf
);
454 ata_scsi_activity_store(struct device
*dev
, struct device_attribute
*attr
,
455 const char *buf
, size_t count
)
457 struct scsi_device
*sdev
= to_scsi_device(dev
);
458 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
459 struct ata_device
*atadev
= ata_scsi_find_dev(ap
, sdev
);
460 enum sw_activity val
;
463 if (atadev
&& ap
->ops
->sw_activity_store
&&
464 (ap
->flags
& ATA_FLAG_SW_ACTIVITY
)) {
465 val
= simple_strtoul(buf
, NULL
, 0);
467 case OFF
: case BLINK_ON
: case BLINK_OFF
:
468 rc
= ap
->ops
->sw_activity_store(atadev
, val
);
477 DEVICE_ATTR(sw_activity
, S_IWUSR
| S_IRUGO
, ata_scsi_activity_show
,
478 ata_scsi_activity_store
);
479 EXPORT_SYMBOL_GPL(dev_attr_sw_activity
);
481 struct device_attribute
*ata_common_sdev_attrs
[] = {
482 &dev_attr_unload_heads
,
483 &dev_attr_ncq_prio_enable
,
486 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs
);
489 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
490 * @sdev: SCSI device for which BIOS geometry is to be determined
491 * @bdev: block device associated with @sdev
492 * @capacity: capacity of SCSI device
493 * @geom: location to which geometry will be output
495 * Generic bios head/sector/cylinder calculator
496 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
497 * mapping. Some situations may arise where the disk is not
498 * bootable if this is not used.
501 * Defined by the SCSI layer. We don't really care.
506 int ata_std_bios_param(struct scsi_device
*sdev
, struct block_device
*bdev
,
507 sector_t capacity
, int geom
[])
511 sector_div(capacity
, 255*63);
518 * ata_scsi_unlock_native_capacity - unlock native capacity
519 * @sdev: SCSI device to adjust device capacity for
521 * This function is called if a partition on @sdev extends beyond
522 * the end of the device. It requests EH to unlock HPA.
525 * Defined by the SCSI layer. Might sleep.
527 void ata_scsi_unlock_native_capacity(struct scsi_device
*sdev
)
529 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
530 struct ata_device
*dev
;
533 spin_lock_irqsave(ap
->lock
, flags
);
535 dev
= ata_scsi_find_dev(ap
, sdev
);
536 if (dev
&& dev
->n_sectors
< dev
->n_native_sectors
) {
537 dev
->flags
|= ATA_DFLAG_UNLOCK_HPA
;
538 dev
->link
->eh_info
.action
|= ATA_EH_RESET
;
539 ata_port_schedule_eh(ap
);
542 spin_unlock_irqrestore(ap
->lock
, flags
);
543 ata_port_wait_eh(ap
);
547 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
549 * @sdev: SCSI device to get identify data for
550 * @arg: User buffer area for identify data
553 * Defined by the SCSI layer. We don't really care.
556 * Zero on success, negative errno on error.
558 static int ata_get_identity(struct ata_port
*ap
, struct scsi_device
*sdev
,
561 struct ata_device
*dev
= ata_scsi_find_dev(ap
, sdev
);
562 u16 __user
*dst
= arg
;
568 if (copy_to_user(dst
, dev
->id
, ATA_ID_WORDS
* sizeof(u16
)))
571 ata_id_string(dev
->id
, buf
, ATA_ID_PROD
, ATA_ID_PROD_LEN
);
572 if (copy_to_user(dst
+ ATA_ID_PROD
, buf
, ATA_ID_PROD_LEN
))
575 ata_id_string(dev
->id
, buf
, ATA_ID_FW_REV
, ATA_ID_FW_REV_LEN
);
576 if (copy_to_user(dst
+ ATA_ID_FW_REV
, buf
, ATA_ID_FW_REV_LEN
))
579 ata_id_string(dev
->id
, buf
, ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
580 if (copy_to_user(dst
+ ATA_ID_SERNO
, buf
, ATA_ID_SERNO_LEN
))
587 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
588 * @scsidev: Device to which we are issuing command
589 * @arg: User provided data for issuing command
592 * Defined by the SCSI layer. We don't really care.
595 * Zero on success, negative errno on error.
597 int ata_cmd_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
600 u8 sensebuf
[SCSI_SENSE_BUFFERSIZE
];
601 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
602 u8 args
[4], *argbuf
= NULL
;
604 enum dma_data_direction data_dir
;
605 struct scsi_sense_hdr sshdr
;
611 if (copy_from_user(args
, arg
, sizeof(args
)))
614 memset(sensebuf
, 0, sizeof(sensebuf
));
615 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
618 argsize
= ATA_SECT_SIZE
* args
[3];
619 argbuf
= kmalloc(argsize
, GFP_KERNEL
);
620 if (argbuf
== NULL
) {
625 scsi_cmd
[1] = (4 << 1); /* PIO Data-in */
626 scsi_cmd
[2] = 0x0e; /* no off.line or cc, read from dev,
627 block count in sector count field */
628 data_dir
= DMA_FROM_DEVICE
;
630 scsi_cmd
[1] = (3 << 1); /* Non-data */
631 scsi_cmd
[2] = 0x20; /* cc but no off.line or data xfer */
635 scsi_cmd
[0] = ATA_16
;
637 scsi_cmd
[4] = args
[2];
638 if (args
[0] == ATA_CMD_SMART
) { /* hack -- ide driver does this too */
639 scsi_cmd
[6] = args
[3];
640 scsi_cmd
[8] = args
[1];
644 scsi_cmd
[6] = args
[1];
646 scsi_cmd
[14] = args
[0];
648 /* Good values for timeout and retries? Values below
649 from scsi_ioctl_send_command() for default case... */
650 cmd_result
= scsi_execute(scsidev
, scsi_cmd
, data_dir
, argbuf
, argsize
,
651 sensebuf
, &sshdr
, (10*HZ
), 5, 0, 0, NULL
);
653 if (driver_byte(cmd_result
) == DRIVER_SENSE
) {/* sense data available */
654 u8
*desc
= sensebuf
+ 8;
655 cmd_result
&= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
657 /* If we set cc then ATA pass-through will cause a
658 * check condition even if no error. Filter that. */
659 if (cmd_result
& SAM_STAT_CHECK_CONDITION
) {
660 if (sshdr
.sense_key
== RECOVERED_ERROR
&&
661 sshdr
.asc
== 0 && sshdr
.ascq
== 0x1d)
662 cmd_result
&= ~SAM_STAT_CHECK_CONDITION
;
665 /* Send userspace a few ATA registers (same as drivers/ide) */
666 if (sensebuf
[0] == 0x72 && /* format is "descriptor" */
667 desc
[0] == 0x09) { /* code is "ATA Descriptor" */
668 args
[0] = desc
[13]; /* status */
669 args
[1] = desc
[3]; /* error */
670 args
[2] = desc
[5]; /* sector count (0:7) */
671 if (copy_to_user(arg
, args
, sizeof(args
)))
683 && copy_to_user(arg
+ sizeof(args
), argbuf
, argsize
))
691 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
692 * @scsidev: Device to which we are issuing command
693 * @arg: User provided data for issuing command
696 * Defined by the SCSI layer. We don't really care.
699 * Zero on success, negative errno on error.
701 int ata_task_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
704 u8 sensebuf
[SCSI_SENSE_BUFFERSIZE
];
705 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
707 struct scsi_sense_hdr sshdr
;
713 if (copy_from_user(args
, arg
, sizeof(args
)))
716 memset(sensebuf
, 0, sizeof(sensebuf
));
717 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
718 scsi_cmd
[0] = ATA_16
;
719 scsi_cmd
[1] = (3 << 1); /* Non-data */
720 scsi_cmd
[2] = 0x20; /* cc but no off.line or data xfer */
721 scsi_cmd
[4] = args
[1];
722 scsi_cmd
[6] = args
[2];
723 scsi_cmd
[8] = args
[3];
724 scsi_cmd
[10] = args
[4];
725 scsi_cmd
[12] = args
[5];
726 scsi_cmd
[13] = args
[6] & 0x4f;
727 scsi_cmd
[14] = args
[0];
729 /* Good values for timeout and retries? Values below
730 from scsi_ioctl_send_command() for default case... */
731 cmd_result
= scsi_execute(scsidev
, scsi_cmd
, DMA_NONE
, NULL
, 0,
732 sensebuf
, &sshdr
, (10*HZ
), 5, 0, 0, NULL
);
734 if (driver_byte(cmd_result
) == DRIVER_SENSE
) {/* sense data available */
735 u8
*desc
= sensebuf
+ 8;
736 cmd_result
&= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
738 /* If we set cc then ATA pass-through will cause a
739 * check condition even if no error. Filter that. */
740 if (cmd_result
& SAM_STAT_CHECK_CONDITION
) {
741 if (sshdr
.sense_key
== RECOVERED_ERROR
&&
742 sshdr
.asc
== 0 && sshdr
.ascq
== 0x1d)
743 cmd_result
&= ~SAM_STAT_CHECK_CONDITION
;
746 /* Send userspace ATA registers */
747 if (sensebuf
[0] == 0x72 && /* format is "descriptor" */
748 desc
[0] == 0x09) {/* code is "ATA Descriptor" */
749 args
[0] = desc
[13]; /* status */
750 args
[1] = desc
[3]; /* error */
751 args
[2] = desc
[5]; /* sector count (0:7) */
752 args
[3] = desc
[7]; /* lbal */
753 args
[4] = desc
[9]; /* lbam */
754 args
[5] = desc
[11]; /* lbah */
755 args
[6] = desc
[12]; /* select */
756 if (copy_to_user(arg
, args
, sizeof(args
)))
770 static int ata_ioc32(struct ata_port
*ap
)
772 if (ap
->flags
& ATA_FLAG_PIO_DMA
)
774 if (ap
->pflags
& ATA_PFLAG_PIO32
)
779 int ata_sas_scsi_ioctl(struct ata_port
*ap
, struct scsi_device
*scsidev
,
780 int cmd
, void __user
*arg
)
788 spin_lock_irqsave(ap
->lock
, flags
);
790 spin_unlock_irqrestore(ap
->lock
, flags
);
791 return put_user(val
, (unsigned long __user
*)arg
);
794 val
= (unsigned long) arg
;
796 spin_lock_irqsave(ap
->lock
, flags
);
797 if (ap
->pflags
& ATA_PFLAG_PIO32CHANGE
) {
799 ap
->pflags
|= ATA_PFLAG_PIO32
;
801 ap
->pflags
&= ~ATA_PFLAG_PIO32
;
803 if (val
!= ata_ioc32(ap
))
806 spin_unlock_irqrestore(ap
->lock
, flags
);
809 case HDIO_GET_IDENTITY
:
810 return ata_get_identity(ap
, scsidev
, arg
);
813 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
815 return ata_cmd_ioctl(scsidev
, arg
);
817 case HDIO_DRIVE_TASK
:
818 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
820 return ata_task_ioctl(scsidev
, arg
);
829 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl
);
831 int ata_scsi_ioctl(struct scsi_device
*scsidev
, int cmd
, void __user
*arg
)
833 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev
->host
),
836 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
839 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
840 * @dev: ATA device to which the new command is attached
841 * @cmd: SCSI command that originated this ATA command
843 * Obtain a reference to an unused ata_queued_cmd structure,
844 * which is the basic libata structure representing a single
845 * ATA command sent to the hardware.
847 * If a command was available, fill in the SCSI-specific
848 * portions of the structure with information on the
852 * spin_lock_irqsave(host lock)
855 * Command allocated, or %NULL if none available.
857 static struct ata_queued_cmd
*ata_scsi_qc_new(struct ata_device
*dev
,
858 struct scsi_cmnd
*cmd
)
860 struct ata_queued_cmd
*qc
;
862 qc
= ata_qc_new_init(dev
, cmd
->request
->tag
);
865 qc
->scsidone
= cmd
->scsi_done
;
867 qc
->sg
= scsi_sglist(cmd
);
868 qc
->n_elem
= scsi_sg_count(cmd
);
870 if (cmd
->request
->rq_flags
& RQF_QUIET
)
871 qc
->flags
|= ATA_QCFLAG_QUIET
;
873 cmd
->result
= (DID_OK
<< 16) | (QUEUE_FULL
<< 1);
880 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd
*qc
)
882 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
884 qc
->extrabytes
= scmd
->request
->extra_len
;
885 qc
->nbytes
= scsi_bufflen(scmd
) + qc
->extrabytes
;
889 * ata_dump_status - user friendly display of error info
890 * @id: id of the port in question
891 * @tf: ptr to filled out taskfile
893 * Decode and dump the ATA error/status registers for the user so
894 * that they have some idea what really happened at the non
895 * make-believe layer.
898 * inherited from caller
900 static void ata_dump_status(unsigned id
, struct ata_taskfile
*tf
)
902 u8 stat
= tf
->command
, err
= tf
->feature
;
904 pr_warn("ata%u: status=0x%02x { ", id
, stat
);
905 if (stat
& ATA_BUSY
) {
906 pr_cont("Busy }\n"); /* Data is not valid in this case */
908 if (stat
& ATA_DRDY
) pr_cont("DriveReady ");
909 if (stat
& ATA_DF
) pr_cont("DeviceFault ");
910 if (stat
& ATA_DSC
) pr_cont("SeekComplete ");
911 if (stat
& ATA_DRQ
) pr_cont("DataRequest ");
912 if (stat
& ATA_CORR
) pr_cont("CorrectedError ");
913 if (stat
& ATA_SENSE
) pr_cont("Sense ");
914 if (stat
& ATA_ERR
) pr_cont("Error ");
918 pr_warn("ata%u: error=0x%02x { ", id
, err
);
919 if (err
& ATA_ABORTED
) pr_cont("DriveStatusError ");
920 if (err
& ATA_ICRC
) {
921 if (err
& ATA_ABORTED
)
923 else pr_cont("Sector ");
925 if (err
& ATA_UNC
) pr_cont("UncorrectableError ");
926 if (err
& ATA_IDNF
) pr_cont("SectorIdNotFound ");
927 if (err
& ATA_TRK0NF
) pr_cont("TrackZeroNotFound ");
928 if (err
& ATA_AMNF
) pr_cont("AddrMarkNotFound ");
935 * ata_to_sense_error - convert ATA error to SCSI error
936 * @id: ATA device number
937 * @drv_stat: value contained in ATA status register
938 * @drv_err: value contained in ATA error register
939 * @sk: the sense key we'll fill out
940 * @asc: the additional sense code we'll fill out
941 * @ascq: the additional sense code qualifier we'll fill out
942 * @verbose: be verbose
944 * Converts an ATA error into a SCSI error. Fill out pointers to
945 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
946 * format sense blocks.
949 * spin_lock_irqsave(host lock)
951 static void ata_to_sense_error(unsigned id
, u8 drv_stat
, u8 drv_err
, u8
*sk
,
952 u8
*asc
, u8
*ascq
, int verbose
)
956 /* Based on the 3ware driver translation table */
957 static const unsigned char sense_table
[][4] = {
959 {0xd1, ABORTED_COMMAND
, 0x00, 0x00},
960 // Device busy Aborted command
962 {0xd0, ABORTED_COMMAND
, 0x00, 0x00},
963 // Device busy Aborted command
965 {0x61, HARDWARE_ERROR
, 0x00, 0x00},
966 // Device fault Hardware error
967 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
968 {0x84, ABORTED_COMMAND
, 0x47, 0x00},
969 // Data CRC error SCSI parity error
970 /* MC|ID|ABRT|TRK0|MARK */
971 {0x37, NOT_READY
, 0x04, 0x00},
972 // Unit offline Not ready
974 {0x09, NOT_READY
, 0x04, 0x00},
975 // Unrecovered disk error Not ready
976 /* Bad address mark */
977 {0x01, MEDIUM_ERROR
, 0x13, 0x00},
978 // Address mark not found for data field
979 /* TRK0 - Track 0 not found */
980 {0x02, HARDWARE_ERROR
, 0x00, 0x00},
982 /* Abort: 0x04 is not translated here, see below */
983 /* Media change request */
984 {0x08, NOT_READY
, 0x04, 0x00},
985 // FIXME: faking offline
986 /* SRV/IDNF - ID not found */
987 {0x10, ILLEGAL_REQUEST
, 0x21, 0x00},
988 // Logical address out of range
989 /* MC - Media Changed */
990 {0x20, UNIT_ATTENTION
, 0x28, 0x00},
991 // Not ready to ready change, medium may have changed
992 /* ECC - Uncorrectable ECC error */
993 {0x40, MEDIUM_ERROR
, 0x11, 0x04},
994 // Unrecovered read error
995 /* BBD - block marked bad */
996 {0x80, MEDIUM_ERROR
, 0x11, 0x04},
997 // Block marked bad Medium error, unrecovered read error
998 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
1000 static const unsigned char stat_table
[][4] = {
1001 /* Must be first because BUSY means no other bits valid */
1002 {0x80, ABORTED_COMMAND
, 0x47, 0x00},
1003 // Busy, fake parity for now
1004 {0x40, ILLEGAL_REQUEST
, 0x21, 0x04},
1005 // Device ready, unaligned write command
1006 {0x20, HARDWARE_ERROR
, 0x44, 0x00},
1007 // Device fault, internal target failure
1008 {0x08, ABORTED_COMMAND
, 0x47, 0x00},
1009 // Timed out in xfer, fake parity for now
1010 {0x04, RECOVERED_ERROR
, 0x11, 0x00},
1011 // Recovered ECC error Medium error, recovered
1012 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
1016 * Is this an error we can process/parse
1018 if (drv_stat
& ATA_BUSY
) {
1019 drv_err
= 0; /* Ignore the err bits, they're invalid */
1023 /* Look for drv_err */
1024 for (i
= 0; sense_table
[i
][0] != 0xFF; i
++) {
1025 /* Look for best matches first */
1026 if ((sense_table
[i
][0] & drv_err
) ==
1027 sense_table
[i
][0]) {
1028 *sk
= sense_table
[i
][1];
1029 *asc
= sense_table
[i
][2];
1030 *ascq
= sense_table
[i
][3];
1031 goto translate_done
;
1037 * Fall back to interpreting status bits. Note that if the drv_err
1038 * has only the ABRT bit set, we decode drv_stat. ABRT by itself
1039 * is not descriptive enough.
1041 for (i
= 0; stat_table
[i
][0] != 0xFF; i
++) {
1042 if (stat_table
[i
][0] & drv_stat
) {
1043 *sk
= stat_table
[i
][1];
1044 *asc
= stat_table
[i
][2];
1045 *ascq
= stat_table
[i
][3];
1046 goto translate_done
;
1051 * We need a sensible error return here, which is tricky, and one
1052 * that won't cause people to do things like return a disk wrongly.
1054 *sk
= ABORTED_COMMAND
;
1060 pr_err("ata%u: translated ATA stat/err 0x%02x/%02x to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
1061 id
, drv_stat
, drv_err
, *sk
, *asc
, *ascq
);
1066 * ata_gen_passthru_sense - Generate check condition sense block.
1067 * @qc: Command that completed.
1069 * This function is specific to the ATA descriptor format sense
1070 * block specified for the ATA pass through commands. Regardless
1071 * of whether the command errored or not, return a sense
1072 * block. Copy all controller registers into the sense
1073 * block. If there was no error, we get the request from an ATA
1074 * passthrough command, so we use the following sense data:
1075 * sk = RECOVERED ERROR
1076 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1082 static void ata_gen_passthru_sense(struct ata_queued_cmd
*qc
)
1084 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1085 struct ata_taskfile
*tf
= &qc
->result_tf
;
1086 unsigned char *sb
= cmd
->sense_buffer
;
1087 unsigned char *desc
= sb
+ 8;
1088 int verbose
= qc
->ap
->ops
->error_handler
== NULL
;
1089 u8 sense_key
, asc
, ascq
;
1091 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
1093 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
1096 * Use ata_to_sense_error() to map status register bits
1097 * onto sense key, asc & ascq.
1100 tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
1101 ata_to_sense_error(qc
->ap
->print_id
, tf
->command
, tf
->feature
,
1102 &sense_key
, &asc
, &ascq
, verbose
);
1103 ata_scsi_set_sense(qc
->dev
, cmd
, sense_key
, asc
, ascq
);
1106 * ATA PASS-THROUGH INFORMATION AVAILABLE
1107 * Always in descriptor format sense.
1109 scsi_build_sense_buffer(1, cmd
->sense_buffer
,
1110 RECOVERED_ERROR
, 0, 0x1D);
1113 if ((cmd
->sense_buffer
[0] & 0x7f) >= 0x72) {
1116 /* descriptor format */
1118 desc
= (char *)scsi_sense_desc_find(sb
, len
+ 8, 9);
1120 if (SCSI_SENSE_BUFFERSIZE
< len
+ 14)
1123 desc
= sb
+ 8 + len
;
1128 * Copy registers into sense buffer.
1131 desc
[3] = tf
->feature
; /* == error reg */
1132 desc
[5] = tf
->nsect
;
1135 desc
[11] = tf
->lbah
;
1136 desc
[12] = tf
->device
;
1137 desc
[13] = tf
->command
; /* == status reg */
1140 * Fill in Extend bit, and the high order bytes
1143 if (tf
->flags
& ATA_TFLAG_LBA48
) {
1145 desc
[4] = tf
->hob_nsect
;
1146 desc
[6] = tf
->hob_lbal
;
1147 desc
[8] = tf
->hob_lbam
;
1148 desc
[10] = tf
->hob_lbah
;
1151 /* Fixed sense format */
1152 desc
[0] = tf
->feature
;
1153 desc
[1] = tf
->command
; /* status */
1154 desc
[2] = tf
->device
;
1155 desc
[3] = tf
->nsect
;
1157 if (tf
->flags
& ATA_TFLAG_LBA48
) {
1161 if (tf
->hob_lbal
|| tf
->hob_lbam
|| tf
->hob_lbah
)
1165 desc
[10] = tf
->lbam
;
1166 desc
[11] = tf
->lbah
;
1171 * ata_gen_ata_sense - generate a SCSI fixed sense block
1172 * @qc: Command that we are erroring out
1174 * Generate sense block for a failed ATA command @qc. Descriptor
1175 * format is used to accommodate LBA48 block address.
1180 static void ata_gen_ata_sense(struct ata_queued_cmd
*qc
)
1182 struct ata_device
*dev
= qc
->dev
;
1183 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1184 struct ata_taskfile
*tf
= &qc
->result_tf
;
1185 unsigned char *sb
= cmd
->sense_buffer
;
1186 int verbose
= qc
->ap
->ops
->error_handler
== NULL
;
1188 u8 sense_key
, asc
, ascq
;
1190 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
1192 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
1194 if (ata_dev_disabled(dev
)) {
1195 /* Device disabled after error recovery */
1196 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */
1197 ata_scsi_set_sense(dev
, cmd
, NOT_READY
, 0x04, 0x21);
1200 /* Use ata_to_sense_error() to map status register bits
1201 * onto sense key, asc & ascq.
1204 tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
1205 ata_to_sense_error(qc
->ap
->print_id
, tf
->command
, tf
->feature
,
1206 &sense_key
, &asc
, &ascq
, verbose
);
1207 ata_scsi_set_sense(dev
, cmd
, sense_key
, asc
, ascq
);
1209 /* Could not decode error */
1210 ata_dev_warn(dev
, "could not decode error status 0x%x err_mask 0x%x\n",
1211 tf
->command
, qc
->err_mask
);
1212 ata_scsi_set_sense(dev
, cmd
, ABORTED_COMMAND
, 0, 0);
1216 block
= ata_tf_read_block(&qc
->result_tf
, dev
);
1217 if (block
== U64_MAX
)
1220 scsi_set_sense_information(sb
, SCSI_SENSE_BUFFERSIZE
, block
);
1223 static void ata_scsi_sdev_config(struct scsi_device
*sdev
)
1225 sdev
->use_10_for_rw
= 1;
1226 sdev
->use_10_for_ms
= 1;
1227 sdev
->no_write_same
= 1;
1229 /* Schedule policy is determined by ->qc_defer() callback and
1230 * it needs to see every deferred qc. Set dev_blocked to 1 to
1231 * prevent SCSI midlayer from automatically deferring
1234 sdev
->max_device_blocked
= 1;
1238 * atapi_drain_needed - Check whether data transfer may overflow
1239 * @rq: request to be checked
1241 * ATAPI commands which transfer variable length data to host
1242 * might overflow due to application error or hardware bug. This
1243 * function checks whether overflow should be drained and ignored
1250 * 1 if ; otherwise, 0.
1252 static int atapi_drain_needed(struct request
*rq
)
1254 if (likely(!blk_rq_is_passthrough(rq
)))
1257 if (!blk_rq_bytes(rq
) || op_is_write(req_op(rq
)))
1260 return atapi_cmd_type(scsi_req(rq
)->cmd
[0]) == ATAPI_MISC
;
1263 static int ata_scsi_dev_config(struct scsi_device
*sdev
,
1264 struct ata_device
*dev
)
1266 struct request_queue
*q
= sdev
->request_queue
;
1268 if (!ata_id_has_unload(dev
->id
))
1269 dev
->flags
|= ATA_DFLAG_NO_UNLOAD
;
1271 /* configure max sectors */
1272 blk_queue_max_hw_sectors(q
, dev
->max_sectors
);
1274 if (dev
->class == ATA_DEV_ATAPI
) {
1277 sdev
->sector_size
= ATA_SECT_SIZE
;
1279 /* set DMA padding */
1280 blk_queue_update_dma_pad(q
, ATA_DMA_PAD_SZ
- 1);
1282 /* configure draining */
1283 buf
= kmalloc(ATAPI_MAX_DRAIN
, q
->bounce_gfp
| GFP_KERNEL
);
1285 ata_dev_err(dev
, "drain buffer allocation failed\n");
1289 blk_queue_dma_drain(q
, atapi_drain_needed
, buf
, ATAPI_MAX_DRAIN
);
1291 sdev
->sector_size
= ata_id_logical_sector_size(dev
->id
);
1292 sdev
->manage_start_stop
= 1;
1296 * ata_pio_sectors() expects buffer for each sector to not cross
1297 * page boundary. Enforce it by requiring buffers to be sector
1298 * aligned, which works iff sector_size is not larger than
1299 * PAGE_SIZE. ATAPI devices also need the alignment as
1300 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1302 if (sdev
->sector_size
> PAGE_SIZE
)
1304 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1307 blk_queue_update_dma_alignment(q
, sdev
->sector_size
- 1);
1309 if (dev
->flags
& ATA_DFLAG_AN
)
1310 set_bit(SDEV_EVT_MEDIA_CHANGE
, sdev
->supported_events
);
1312 if (dev
->flags
& ATA_DFLAG_NCQ
) {
1315 depth
= min(sdev
->host
->can_queue
, ata_id_queue_depth(dev
->id
));
1316 depth
= min(ATA_MAX_QUEUE
, depth
);
1317 scsi_change_queue_depth(sdev
, depth
);
1320 blk_queue_flush_queueable(q
, false);
1322 if (dev
->flags
& ATA_DFLAG_TRUSTED
)
1323 sdev
->security_supported
= 1;
1330 * ata_scsi_slave_config - Set SCSI device attributes
1331 * @sdev: SCSI device to examine
1333 * This is called before we actually start reading
1334 * and writing to the device, to configure certain
1335 * SCSI mid-layer behaviors.
1338 * Defined by SCSI layer. We don't really care.
1341 int ata_scsi_slave_config(struct scsi_device
*sdev
)
1343 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1344 struct ata_device
*dev
= __ata_scsi_find_dev(ap
, sdev
);
1347 ata_scsi_sdev_config(sdev
);
1350 rc
= ata_scsi_dev_config(sdev
, dev
);
1356 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1357 * @sdev: SCSI device to be destroyed
1359 * @sdev is about to be destroyed for hot/warm unplugging. If
1360 * this unplugging was initiated by libata as indicated by NULL
1361 * dev->sdev, this function doesn't have to do anything.
1362 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1363 * Clear dev->sdev, schedule the device for ATA detach and invoke
1367 * Defined by SCSI layer. We don't really care.
1369 void ata_scsi_slave_destroy(struct scsi_device
*sdev
)
1371 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1372 struct request_queue
*q
= sdev
->request_queue
;
1373 unsigned long flags
;
1374 struct ata_device
*dev
;
1376 if (!ap
->ops
->error_handler
)
1379 spin_lock_irqsave(ap
->lock
, flags
);
1380 dev
= __ata_scsi_find_dev(ap
, sdev
);
1381 if (dev
&& dev
->sdev
) {
1382 /* SCSI device already in CANCEL state, no need to offline it */
1384 dev
->flags
|= ATA_DFLAG_DETACH
;
1385 ata_port_schedule_eh(ap
);
1387 spin_unlock_irqrestore(ap
->lock
, flags
);
1389 kfree(q
->dma_drain_buffer
);
1390 q
->dma_drain_buffer
= NULL
;
1391 q
->dma_drain_size
= 0;
1395 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth
1396 * @ap: ATA port to which the device change the queue depth
1397 * @sdev: SCSI device to configure queue depth for
1398 * @queue_depth: new queue depth
1400 * libsas and libata have different approaches for associating a sdev to
1404 int __ata_change_queue_depth(struct ata_port
*ap
, struct scsi_device
*sdev
,
1407 struct ata_device
*dev
;
1408 unsigned long flags
;
1410 if (queue_depth
< 1 || queue_depth
== sdev
->queue_depth
)
1411 return sdev
->queue_depth
;
1413 dev
= ata_scsi_find_dev(ap
, sdev
);
1414 if (!dev
|| !ata_dev_enabled(dev
))
1415 return sdev
->queue_depth
;
1418 spin_lock_irqsave(ap
->lock
, flags
);
1419 dev
->flags
&= ~ATA_DFLAG_NCQ_OFF
;
1420 if (queue_depth
== 1 || !ata_ncq_enabled(dev
)) {
1421 dev
->flags
|= ATA_DFLAG_NCQ_OFF
;
1424 spin_unlock_irqrestore(ap
->lock
, flags
);
1426 /* limit and apply queue depth */
1427 queue_depth
= min(queue_depth
, sdev
->host
->can_queue
);
1428 queue_depth
= min(queue_depth
, ata_id_queue_depth(dev
->id
));
1429 queue_depth
= min(queue_depth
, ATA_MAX_QUEUE
);
1431 if (sdev
->queue_depth
== queue_depth
)
1434 return scsi_change_queue_depth(sdev
, queue_depth
);
1438 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1439 * @sdev: SCSI device to configure queue depth for
1440 * @queue_depth: new queue depth
1442 * This is libata standard hostt->change_queue_depth callback.
1443 * SCSI will call into this callback when user tries to set queue
1447 * SCSI layer (we don't care)
1450 * Newly configured queue depth.
1452 int ata_scsi_change_queue_depth(struct scsi_device
*sdev
, int queue_depth
)
1454 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1456 return __ata_change_queue_depth(ap
, sdev
, queue_depth
);
1460 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1461 * @qc: Storage for translated ATA taskfile
1463 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1464 * (to start). Perhaps these commands should be preceded by
1465 * CHECK POWER MODE to see what power mode the device is already in.
1466 * [See SAT revision 5 at www.t10.org]
1469 * spin_lock_irqsave(host lock)
1472 * Zero on success, non-zero on error.
1474 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd
*qc
)
1476 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1477 struct ata_taskfile
*tf
= &qc
->tf
;
1478 const u8
*cdb
= scmd
->cmnd
;
1482 if (scmd
->cmd_len
< 5) {
1487 tf
->flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1488 tf
->protocol
= ATA_PROT_NODATA
;
1490 ; /* ignore IMMED bit, violates sat-r05 */
1495 goto invalid_fld
; /* LOEJ bit set not supported */
1497 if (((cdb
[4] >> 4) & 0xf) != 0) {
1500 goto invalid_fld
; /* power conditions not supported */
1504 tf
->nsect
= 1; /* 1 sector, lba=0 */
1506 if (qc
->dev
->flags
& ATA_DFLAG_LBA
) {
1507 tf
->flags
|= ATA_TFLAG_LBA
;
1512 tf
->device
|= ATA_LBA
;
1515 tf
->lbal
= 0x1; /* sect */
1516 tf
->lbam
= 0x0; /* cyl low */
1517 tf
->lbah
= 0x0; /* cyl high */
1520 tf
->command
= ATA_CMD_VERIFY
; /* READ VERIFY */
1522 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1523 * or S5) causing some drives to spin up and down again.
1525 if ((qc
->ap
->flags
& ATA_FLAG_NO_POWEROFF_SPINDOWN
) &&
1526 system_state
== SYSTEM_POWER_OFF
)
1529 if ((qc
->ap
->flags
& ATA_FLAG_NO_HIBERNATE_SPINDOWN
) &&
1530 system_entering_hibernation())
1533 /* Issue ATA STANDBY IMMEDIATE command */
1534 tf
->command
= ATA_CMD_STANDBYNOW1
;
1538 * Standby and Idle condition timers could be implemented but that
1539 * would require libata to implement the Power condition mode page
1540 * and allow the user to change it. Changing mode pages requires
1541 * MODE SELECT to be implemented.
1547 ata_scsi_set_invalid_field(qc
->dev
, scmd
, fp
, bp
);
1550 scmd
->result
= SAM_STAT_GOOD
;
1556 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1557 * @qc: Storage for translated ATA taskfile
1559 * Sets up an ATA taskfile to issue FLUSH CACHE or
1563 * spin_lock_irqsave(host lock)
1566 * Zero on success, non-zero on error.
1568 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd
*qc
)
1570 struct ata_taskfile
*tf
= &qc
->tf
;
1572 tf
->flags
|= ATA_TFLAG_DEVICE
;
1573 tf
->protocol
= ATA_PROT_NODATA
;
1575 if (qc
->dev
->flags
& ATA_DFLAG_FLUSH_EXT
)
1576 tf
->command
= ATA_CMD_FLUSH_EXT
;
1578 tf
->command
= ATA_CMD_FLUSH
;
1580 /* flush is critical for IO integrity, consider it an IO command */
1581 qc
->flags
|= ATA_QCFLAG_IO
;
1587 * scsi_6_lba_len - Get LBA and transfer length
1588 * @cdb: SCSI command to translate
1590 * Calculate LBA and transfer length for 6-byte commands.
1594 * @plen: the transfer length
1596 static void scsi_6_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1601 VPRINTK("six-byte command\n");
1603 lba
|= ((u64
)(cdb
[1] & 0x1f)) << 16;
1604 lba
|= ((u64
)cdb
[2]) << 8;
1605 lba
|= ((u64
)cdb
[3]);
1614 * scsi_10_lba_len - Get LBA and transfer length
1615 * @cdb: SCSI command to translate
1617 * Calculate LBA and transfer length for 10-byte commands.
1621 * @plen: the transfer length
1623 static void scsi_10_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1628 VPRINTK("ten-byte command\n");
1630 lba
|= ((u64
)cdb
[2]) << 24;
1631 lba
|= ((u64
)cdb
[3]) << 16;
1632 lba
|= ((u64
)cdb
[4]) << 8;
1633 lba
|= ((u64
)cdb
[5]);
1635 len
|= ((u32
)cdb
[7]) << 8;
1636 len
|= ((u32
)cdb
[8]);
1643 * scsi_16_lba_len - Get LBA and transfer length
1644 * @cdb: SCSI command to translate
1646 * Calculate LBA and transfer length for 16-byte commands.
1650 * @plen: the transfer length
1652 static void scsi_16_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1657 VPRINTK("sixteen-byte command\n");
1659 lba
|= ((u64
)cdb
[2]) << 56;
1660 lba
|= ((u64
)cdb
[3]) << 48;
1661 lba
|= ((u64
)cdb
[4]) << 40;
1662 lba
|= ((u64
)cdb
[5]) << 32;
1663 lba
|= ((u64
)cdb
[6]) << 24;
1664 lba
|= ((u64
)cdb
[7]) << 16;
1665 lba
|= ((u64
)cdb
[8]) << 8;
1666 lba
|= ((u64
)cdb
[9]);
1668 len
|= ((u32
)cdb
[10]) << 24;
1669 len
|= ((u32
)cdb
[11]) << 16;
1670 len
|= ((u32
)cdb
[12]) << 8;
1671 len
|= ((u32
)cdb
[13]);
1678 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1679 * @qc: Storage for translated ATA taskfile
1681 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1684 * spin_lock_irqsave(host lock)
1687 * Zero on success, non-zero on error.
1689 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd
*qc
)
1691 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1692 struct ata_taskfile
*tf
= &qc
->tf
;
1693 struct ata_device
*dev
= qc
->dev
;
1694 u64 dev_sectors
= qc
->dev
->n_sectors
;
1695 const u8
*cdb
= scmd
->cmnd
;
1700 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1701 tf
->protocol
= ATA_PROT_NODATA
;
1703 if (cdb
[0] == VERIFY
) {
1704 if (scmd
->cmd_len
< 10) {
1708 scsi_10_lba_len(cdb
, &block
, &n_block
);
1709 } else if (cdb
[0] == VERIFY_16
) {
1710 if (scmd
->cmd_len
< 16) {
1714 scsi_16_lba_len(cdb
, &block
, &n_block
);
1722 if (block
>= dev_sectors
)
1724 if ((block
+ n_block
) > dev_sectors
)
1727 if (dev
->flags
& ATA_DFLAG_LBA
) {
1728 tf
->flags
|= ATA_TFLAG_LBA
;
1730 if (lba_28_ok(block
, n_block
)) {
1732 tf
->command
= ATA_CMD_VERIFY
;
1733 tf
->device
|= (block
>> 24) & 0xf;
1734 } else if (lba_48_ok(block
, n_block
)) {
1735 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
1739 tf
->flags
|= ATA_TFLAG_LBA48
;
1740 tf
->command
= ATA_CMD_VERIFY_EXT
;
1742 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
1744 tf
->hob_lbah
= (block
>> 40) & 0xff;
1745 tf
->hob_lbam
= (block
>> 32) & 0xff;
1746 tf
->hob_lbal
= (block
>> 24) & 0xff;
1748 /* request too large even for LBA48 */
1751 tf
->nsect
= n_block
& 0xff;
1753 tf
->lbah
= (block
>> 16) & 0xff;
1754 tf
->lbam
= (block
>> 8) & 0xff;
1755 tf
->lbal
= block
& 0xff;
1757 tf
->device
|= ATA_LBA
;
1760 u32 sect
, head
, cyl
, track
;
1762 if (!lba_28_ok(block
, n_block
))
1765 /* Convert LBA to CHS */
1766 track
= (u32
)block
/ dev
->sectors
;
1767 cyl
= track
/ dev
->heads
;
1768 head
= track
% dev
->heads
;
1769 sect
= (u32
)block
% dev
->sectors
+ 1;
1771 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1772 (u32
)block
, track
, cyl
, head
, sect
);
1774 /* Check whether the converted CHS can fit.
1778 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
1781 tf
->command
= ATA_CMD_VERIFY
;
1782 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
1785 tf
->lbah
= cyl
>> 8;
1792 ata_scsi_set_invalid_field(qc
->dev
, scmd
, fp
, 0xff);
1796 ata_scsi_set_sense(qc
->dev
, scmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1797 /* "Logical Block Address out of range" */
1801 scmd
->result
= SAM_STAT_GOOD
;
1806 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1807 * @qc: Storage for translated ATA taskfile
1809 * Converts any of six SCSI read/write commands into the
1810 * ATA counterpart, including starting sector (LBA),
1811 * sector count, and taking into account the device's LBA48
1814 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1815 * %WRITE_16 are currently supported.
1818 * spin_lock_irqsave(host lock)
1821 * Zero on success, non-zero on error.
1823 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd
*qc
)
1825 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1826 const u8
*cdb
= scmd
->cmnd
;
1827 struct request
*rq
= scmd
->request
;
1828 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq
));
1829 unsigned int tf_flags
= 0;
1835 if (cdb
[0] == WRITE_10
|| cdb
[0] == WRITE_6
|| cdb
[0] == WRITE_16
)
1836 tf_flags
|= ATA_TFLAG_WRITE
;
1838 /* Calculate the SCSI LBA, transfer length and FUA. */
1842 if (unlikely(scmd
->cmd_len
< 10)) {
1846 scsi_10_lba_len(cdb
, &block
, &n_block
);
1847 if (cdb
[1] & (1 << 3))
1848 tf_flags
|= ATA_TFLAG_FUA
;
1852 if (unlikely(scmd
->cmd_len
< 6)) {
1856 scsi_6_lba_len(cdb
, &block
, &n_block
);
1858 /* for 6-byte r/w commands, transfer length 0
1859 * means 256 blocks of data, not 0 block.
1866 if (unlikely(scmd
->cmd_len
< 16)) {
1870 scsi_16_lba_len(cdb
, &block
, &n_block
);
1871 if (cdb
[1] & (1 << 3))
1872 tf_flags
|= ATA_TFLAG_FUA
;
1875 DPRINTK("no-byte command\n");
1880 /* Check and compose ATA command */
1882 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1883 * length 0 means transfer 0 block of data.
1884 * However, for ATA R/W commands, sector count 0 means
1885 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1887 * WARNING: one or two older ATA drives treat 0 as 0...
1891 qc
->flags
|= ATA_QCFLAG_IO
;
1892 qc
->nbytes
= n_block
* scmd
->device
->sector_size
;
1894 rc
= ata_build_rw_tf(&qc
->tf
, qc
->dev
, block
, n_block
, tf_flags
,
1897 if (likely(rc
== 0))
1902 /* treat all other errors as -EINVAL, fall through */
1904 ata_scsi_set_invalid_field(qc
->dev
, scmd
, fp
, 0xff);
1908 ata_scsi_set_sense(qc
->dev
, scmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1909 /* "Logical Block Address out of range" */
1913 scmd
->result
= SAM_STAT_GOOD
;
1917 static void ata_qc_done(struct ata_queued_cmd
*qc
)
1919 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1920 void (*done
)(struct scsi_cmnd
*) = qc
->scsidone
;
1926 static void ata_scsi_qc_complete(struct ata_queued_cmd
*qc
)
1928 struct ata_port
*ap
= qc
->ap
;
1929 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1930 u8
*cdb
= cmd
->cmnd
;
1931 int need_sense
= (qc
->err_mask
!= 0);
1933 /* For ATA pass thru (SAT) commands, generate a sense block if
1934 * user mandated it or if there's an error. Note that if we
1935 * generate because the user forced us to [CK_COND =1], a check
1936 * condition is generated and the ATA register values are returned
1937 * whether the command completed successfully or not. If there
1938 * was no error, we use the following sense data:
1939 * sk = RECOVERED ERROR
1940 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1942 if (((cdb
[0] == ATA_16
) || (cdb
[0] == ATA_12
)) &&
1943 ((cdb
[2] & 0x20) || need_sense
))
1944 ata_gen_passthru_sense(qc
);
1945 else if (qc
->flags
& ATA_QCFLAG_SENSE_VALID
)
1946 cmd
->result
= SAM_STAT_CHECK_CONDITION
;
1947 else if (need_sense
)
1948 ata_gen_ata_sense(qc
);
1950 cmd
->result
= SAM_STAT_GOOD
;
1952 if (need_sense
&& !ap
->ops
->error_handler
)
1953 ata_dump_status(ap
->print_id
, &qc
->result_tf
);
1959 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1960 * @dev: ATA device to which the command is addressed
1961 * @cmd: SCSI command to execute
1962 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1964 * Our ->queuecommand() function has decided that the SCSI
1965 * command issued can be directly translated into an ATA
1966 * command, rather than handled internally.
1968 * This function sets up an ata_queued_cmd structure for the
1969 * SCSI command, and sends that ata_queued_cmd to the hardware.
1971 * The xlat_func argument (actor) returns 0 if ready to execute
1972 * ATA command, else 1 to finish translation. If 1 is returned
1973 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1974 * to be set reflecting an error condition or clean (early)
1978 * spin_lock_irqsave(host lock)
1981 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1982 * needs to be deferred.
1984 static int ata_scsi_translate(struct ata_device
*dev
, struct scsi_cmnd
*cmd
,
1985 ata_xlat_func_t xlat_func
)
1987 struct ata_port
*ap
= dev
->link
->ap
;
1988 struct ata_queued_cmd
*qc
;
1993 qc
= ata_scsi_qc_new(dev
, cmd
);
1997 /* data is present; dma-map it */
1998 if (cmd
->sc_data_direction
== DMA_FROM_DEVICE
||
1999 cmd
->sc_data_direction
== DMA_TO_DEVICE
) {
2000 if (unlikely(scsi_bufflen(cmd
) < 1)) {
2001 ata_dev_warn(dev
, "WARNING: zero len r/w req\n");
2005 ata_sg_init(qc
, scsi_sglist(cmd
), scsi_sg_count(cmd
));
2007 qc
->dma_dir
= cmd
->sc_data_direction
;
2010 qc
->complete_fn
= ata_scsi_qc_complete
;
2015 if (ap
->ops
->qc_defer
) {
2016 if ((rc
= ap
->ops
->qc_defer(qc
)))
2020 /* select device, send command to hardware */
2028 cmd
->scsi_done(cmd
);
2029 DPRINTK("EXIT - early finish (good or error)\n");
2034 cmd
->result
= (DID_ERROR
<< 16);
2035 cmd
->scsi_done(cmd
);
2037 DPRINTK("EXIT - internal\n");
2042 DPRINTK("EXIT - defer\n");
2043 if (rc
== ATA_DEFER_LINK
)
2044 return SCSI_MLQUEUE_DEVICE_BUSY
;
2046 return SCSI_MLQUEUE_HOST_BUSY
;
2049 struct ata_scsi_args
{
2050 struct ata_device
*dev
;
2052 struct scsi_cmnd
*cmd
;
2056 * ata_scsi_rbuf_get - Map response buffer.
2057 * @cmd: SCSI command containing buffer to be mapped.
2058 * @flags: unsigned long variable to store irq enable status
2059 * @copy_in: copy in from user buffer
2061 * Prepare buffer for simulated SCSI commands.
2064 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
2067 * Pointer to response buffer.
2069 static void *ata_scsi_rbuf_get(struct scsi_cmnd
*cmd
, bool copy_in
,
2070 unsigned long *flags
)
2072 spin_lock_irqsave(&ata_scsi_rbuf_lock
, *flags
);
2074 memset(ata_scsi_rbuf
, 0, ATA_SCSI_RBUF_SIZE
);
2076 sg_copy_to_buffer(scsi_sglist(cmd
), scsi_sg_count(cmd
),
2077 ata_scsi_rbuf
, ATA_SCSI_RBUF_SIZE
);
2078 return ata_scsi_rbuf
;
2082 * ata_scsi_rbuf_put - Unmap response buffer.
2083 * @cmd: SCSI command containing buffer to be unmapped.
2084 * @copy_out: copy out result
2085 * @flags: @flags passed to ata_scsi_rbuf_get()
2087 * Returns rbuf buffer. The result is copied to @cmd's buffer if
2088 * @copy_back is true.
2091 * Unlocks ata_scsi_rbuf_lock.
2093 static inline void ata_scsi_rbuf_put(struct scsi_cmnd
*cmd
, bool copy_out
,
2094 unsigned long *flags
)
2097 sg_copy_from_buffer(scsi_sglist(cmd
), scsi_sg_count(cmd
),
2098 ata_scsi_rbuf
, ATA_SCSI_RBUF_SIZE
);
2099 spin_unlock_irqrestore(&ata_scsi_rbuf_lock
, *flags
);
2103 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
2104 * @args: device IDENTIFY data / SCSI command of interest.
2105 * @actor: Callback hook for desired SCSI command simulator
2107 * Takes care of the hard work of simulating a SCSI command...
2108 * Mapping the response buffer, calling the command's handler,
2109 * and handling the handler's return value. This return value
2110 * indicates whether the handler wishes the SCSI command to be
2111 * completed successfully (0), or not (in which case cmd->result
2112 * and sense buffer are assumed to be set).
2115 * spin_lock_irqsave(host lock)
2117 static void ata_scsi_rbuf_fill(struct ata_scsi_args
*args
,
2118 unsigned int (*actor
)(struct ata_scsi_args
*args
, u8
*rbuf
))
2122 struct scsi_cmnd
*cmd
= args
->cmd
;
2123 unsigned long flags
;
2125 rbuf
= ata_scsi_rbuf_get(cmd
, false, &flags
);
2126 rc
= actor(args
, rbuf
);
2127 ata_scsi_rbuf_put(cmd
, rc
== 0, &flags
);
2130 cmd
->result
= SAM_STAT_GOOD
;
2134 * ata_scsiop_inq_std - Simulate INQUIRY command
2135 * @args: device IDENTIFY data / SCSI command of interest.
2136 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2138 * Returns standard device identification data associated
2139 * with non-VPD INQUIRY command output.
2142 * spin_lock_irqsave(host lock)
2144 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args
*args
, u8
*rbuf
)
2146 static const u8 versions
[] = {
2148 0x60, /* SAM-3 (no version claimed) */
2151 0x20, /* SBC-2 (no version claimed) */
2154 0x00 /* SPC-3 (no version claimed) */
2156 static const u8 versions_zbc
[] = {
2158 0xA0, /* SAM-5 (no version claimed) */
2161 0x00, /* SBC-4 (no version claimed) */
2164 0xC0, /* SPC-5 (no version claimed) */
2173 0x5, /* claim SPC-3 version compatibility */
2183 /* set scsi removable (RMB) bit per ata bit, or if the
2184 * AHCI port says it's external (Hotplug-capable, eSATA).
2186 if (ata_id_removable(args
->id
) ||
2187 (args
->dev
->link
->ap
->pflags
& ATA_PFLAG_EXTERNAL
))
2190 if (args
->dev
->class == ATA_DEV_ZAC
) {
2192 hdr
[2] = 0x7; /* claim SPC-5 version compatibility */
2195 memcpy(rbuf
, hdr
, sizeof(hdr
));
2196 memcpy(&rbuf
[8], "ATA ", 8);
2197 ata_id_string(args
->id
, &rbuf
[16], ATA_ID_PROD
, 16);
2199 /* From SAT, use last 2 words from fw rev unless they are spaces */
2200 ata_id_string(args
->id
, &rbuf
[32], ATA_ID_FW_REV
+ 2, 4);
2201 if (strncmp(&rbuf
[32], " ", 4) == 0)
2202 ata_id_string(args
->id
, &rbuf
[32], ATA_ID_FW_REV
, 4);
2204 if (rbuf
[32] == 0 || rbuf
[32] == ' ')
2205 memcpy(&rbuf
[32], "n/a ", 4);
2207 if (ata_id_zoned_cap(args
->id
) || args
->dev
->class == ATA_DEV_ZAC
)
2208 memcpy(rbuf
+ 58, versions_zbc
, sizeof(versions_zbc
));
2210 memcpy(rbuf
+ 58, versions
, sizeof(versions
));
2216 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
2217 * @args: device IDENTIFY data / SCSI command of interest.
2218 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2220 * Returns list of inquiry VPD pages available.
2223 * spin_lock_irqsave(host lock)
2225 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args
*args
, u8
*rbuf
)
2228 static const u8 pages
[] = {
2229 0x00, /* page 0x00, this page */
2230 0x80, /* page 0x80, unit serial no page */
2231 0x83, /* page 0x83, device ident page */
2232 0x89, /* page 0x89, ata info page */
2233 0xb0, /* page 0xb0, block limits page */
2234 0xb1, /* page 0xb1, block device characteristics page */
2235 0xb2, /* page 0xb2, thin provisioning page */
2236 0xb6, /* page 0xb6, zoned block device characteristics */
2239 num_pages
= sizeof(pages
);
2240 if (!(args
->dev
->flags
& ATA_DFLAG_ZAC
))
2242 rbuf
[3] = num_pages
; /* number of supported VPD pages */
2243 memcpy(rbuf
+ 4, pages
, num_pages
);
2248 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
2249 * @args: device IDENTIFY data / SCSI command of interest.
2250 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2252 * Returns ATA device serial number.
2255 * spin_lock_irqsave(host lock)
2257 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args
*args
, u8
*rbuf
)
2259 static const u8 hdr
[] = {
2261 0x80, /* this page code */
2263 ATA_ID_SERNO_LEN
, /* page len */
2266 memcpy(rbuf
, hdr
, sizeof(hdr
));
2267 ata_id_string(args
->id
, (unsigned char *) &rbuf
[4],
2268 ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
2273 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
2274 * @args: device IDENTIFY data / SCSI command of interest.
2275 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2277 * Yields two logical unit device identification designators:
2278 * - vendor specific ASCII containing the ATA serial number
2279 * - SAT defined "t10 vendor id based" containing ASCII vendor
2280 * name ("ATA "), model and serial numbers.
2283 * spin_lock_irqsave(host lock)
2285 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args
*args
, u8
*rbuf
)
2287 const int sat_model_serial_desc_len
= 68;
2290 rbuf
[1] = 0x83; /* this page code */
2293 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2295 rbuf
[num
+ 3] = ATA_ID_SERNO_LEN
;
2297 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
,
2298 ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
2299 num
+= ATA_ID_SERNO_LEN
;
2301 /* SAT defined lu model and serial numbers descriptor */
2302 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2305 rbuf
[num
+ 3] = sat_model_serial_desc_len
;
2307 memcpy(rbuf
+ num
, "ATA ", 8);
2309 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
, ATA_ID_PROD
,
2311 num
+= ATA_ID_PROD_LEN
;
2312 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
, ATA_ID_SERNO
,
2314 num
+= ATA_ID_SERNO_LEN
;
2316 if (ata_id_has_wwn(args
->id
)) {
2317 /* SAT defined lu world wide name */
2318 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
2321 rbuf
[num
+ 3] = ATA_ID_WWN_LEN
;
2323 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
,
2324 ATA_ID_WWN
, ATA_ID_WWN_LEN
);
2325 num
+= ATA_ID_WWN_LEN
;
2327 rbuf
[3] = num
- 4; /* page len (assume less than 256 bytes) */
2332 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2333 * @args: device IDENTIFY data / SCSI command of interest.
2334 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2336 * Yields SAT-specified ATA VPD page.
2339 * spin_lock_irqsave(host lock)
2341 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args
*args
, u8
*rbuf
)
2343 struct ata_taskfile tf
;
2345 memset(&tf
, 0, sizeof(tf
));
2347 rbuf
[1] = 0x89; /* our page code */
2348 rbuf
[2] = (0x238 >> 8); /* page size fixed at 238h */
2349 rbuf
[3] = (0x238 & 0xff);
2351 memcpy(&rbuf
[8], "linux ", 8);
2352 memcpy(&rbuf
[16], "libata ", 16);
2353 memcpy(&rbuf
[32], DRV_VERSION
, 4);
2355 /* we don't store the ATA device signature, so we fake it */
2357 tf
.command
= ATA_DRDY
; /* really, this is Status reg */
2361 ata_tf_to_fis(&tf
, 0, 1, &rbuf
[36]); /* TODO: PMP? */
2362 rbuf
[36] = 0x34; /* force D2H Reg FIS (34h) */
2364 rbuf
[56] = ATA_CMD_ID_ATA
;
2366 memcpy(&rbuf
[60], &args
->id
[0], 512);
2370 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args
*args
, u8
*rbuf
)
2375 rbuf
[3] = 0x3c; /* required VPD size with unmap support */
2378 * Optimal transfer length granularity.
2380 * This is always one physical block, but for disks with a smaller
2381 * logical than physical sector size we need to figure out what the
2384 min_io_sectors
= 1 << ata_id_log2_per_physical_sector(args
->id
);
2385 put_unaligned_be16(min_io_sectors
, &rbuf
[6]);
2388 * Optimal unmap granularity.
2390 * The ATA spec doesn't even know about a granularity or alignment
2391 * for the TRIM command. We can leave away most of the unmap related
2392 * VPD page entries, but we have specifify a granularity to signal
2393 * that we support some form of unmap - in thise case via WRITE SAME
2394 * with the unmap bit set.
2396 if (ata_id_has_trim(args
->id
)) {
2397 put_unaligned_be64(65535 * ATA_MAX_TRIM_RNUM
, &rbuf
[36]);
2398 put_unaligned_be32(1, &rbuf
[28]);
2404 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args
*args
, u8
*rbuf
)
2406 int form_factor
= ata_id_form_factor(args
->id
);
2407 int media_rotation_rate
= ata_id_rotation_rate(args
->id
);
2408 u8 zoned
= ata_id_zoned_cap(args
->id
);
2412 rbuf
[4] = media_rotation_rate
>> 8;
2413 rbuf
[5] = media_rotation_rate
;
2414 rbuf
[7] = form_factor
;
2416 rbuf
[8] = (zoned
<< 4);
2421 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args
*args
, u8
*rbuf
)
2423 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2426 rbuf
[5] = 1 << 6; /* TPWS */
2431 static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args
*args
, u8
*rbuf
)
2434 * zbc-r05 SCSI Zoned Block device characteristics VPD page
2440 * URSWRZ bit is only meaningful for host-managed ZAC drives
2442 if (args
->dev
->zac_zoned_cap
& 1)
2444 put_unaligned_be32(args
->dev
->zac_zones_optimal_open
, &rbuf
[8]);
2445 put_unaligned_be32(args
->dev
->zac_zones_optimal_nonseq
, &rbuf
[12]);
2446 put_unaligned_be32(args
->dev
->zac_zones_max_open
, &rbuf
[16]);
2452 * modecpy - Prepare response for MODE SENSE
2453 * @dest: output buffer
2454 * @src: data being copied
2455 * @n: length of mode page
2456 * @changeable: whether changeable parameters are requested
2458 * Generate a generic MODE SENSE page for either current or changeable
2464 static void modecpy(u8
*dest
, const u8
*src
, int n
, bool changeable
)
2467 memcpy(dest
, src
, 2);
2468 memset(dest
+ 2, 0, n
- 2);
2470 memcpy(dest
, src
, n
);
2475 * ata_msense_caching - Simulate MODE SENSE caching info page
2476 * @id: device IDENTIFY data
2477 * @buf: output buffer
2478 * @changeable: whether changeable parameters are requested
2480 * Generate a caching info page, which conditionally indicates
2481 * write caching to the SCSI layer, depending on device
2487 static unsigned int ata_msense_caching(u16
*id
, u8
*buf
, bool changeable
)
2489 modecpy(buf
, def_cache_mpage
, sizeof(def_cache_mpage
), changeable
);
2491 buf
[2] |= (1 << 2); /* ata_mselect_caching() */
2493 buf
[2] |= (ata_id_wcache_enabled(id
) << 2); /* write cache enable */
2494 buf
[12] |= (!ata_id_rahead_enabled(id
) << 5); /* disable read ahead */
2496 return sizeof(def_cache_mpage
);
2500 * ata_msense_control - Simulate MODE SENSE control mode page
2501 * @dev: ATA device of interest
2502 * @buf: output buffer
2503 * @changeable: whether changeable parameters are requested
2505 * Generate a generic MODE SENSE control mode page.
2510 static unsigned int ata_msense_control(struct ata_device
*dev
, u8
*buf
,
2513 modecpy(buf
, def_control_mpage
, sizeof(def_control_mpage
), changeable
);
2515 buf
[2] |= (1 << 2); /* ata_mselect_control() */
2517 bool d_sense
= (dev
->flags
& ATA_DFLAG_D_SENSE
);
2519 buf
[2] |= (d_sense
<< 2); /* descriptor format sense data */
2521 return sizeof(def_control_mpage
);
2525 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2526 * @buf: output buffer
2527 * @changeable: whether changeable parameters are requested
2529 * Generate a generic MODE SENSE r/w error recovery page.
2534 static unsigned int ata_msense_rw_recovery(u8
*buf
, bool changeable
)
2536 modecpy(buf
, def_rw_recovery_mpage
, sizeof(def_rw_recovery_mpage
),
2538 return sizeof(def_rw_recovery_mpage
);
2542 * We can turn this into a real blacklist if it's needed, for now just
2543 * blacklist any Maxtor BANC1G10 revision firmware
2545 static int ata_dev_supports_fua(u16
*id
)
2547 unsigned char model
[ATA_ID_PROD_LEN
+ 1], fw
[ATA_ID_FW_REV_LEN
+ 1];
2551 if (!ata_id_has_fua(id
))
2554 ata_id_c_string(id
, model
, ATA_ID_PROD
, sizeof(model
));
2555 ata_id_c_string(id
, fw
, ATA_ID_FW_REV
, sizeof(fw
));
2557 if (strcmp(model
, "Maxtor"))
2559 if (strcmp(fw
, "BANC1G10"))
2562 return 0; /* blacklisted */
2566 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2567 * @args: device IDENTIFY data / SCSI command of interest.
2568 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2570 * Simulate MODE SENSE commands. Assume this is invoked for direct
2571 * access devices (e.g. disks) only. There should be no block
2572 * descriptor for other device types.
2575 * spin_lock_irqsave(host lock)
2577 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args
*args
, u8
*rbuf
)
2579 struct ata_device
*dev
= args
->dev
;
2580 u8
*scsicmd
= args
->cmd
->cmnd
, *p
= rbuf
;
2581 static const u8 sat_blk_desc
[] = {
2582 0, 0, 0, 0, /* number of blocks: sat unspecified */
2584 0, 0x2, 0x0 /* block length: 512 bytes */
2587 unsigned int ebd
, page_control
, six_byte
;
2588 u8 dpofua
, bp
= 0xff;
2593 six_byte
= (scsicmd
[0] == MODE_SENSE
);
2594 ebd
= !(scsicmd
[1] & 0x8); /* dbd bit inverted == edb */
2596 * LLBA bit in msense(10) ignored (compliant)
2599 page_control
= scsicmd
[2] >> 6;
2600 switch (page_control
) {
2601 case 0: /* current */
2602 case 1: /* changeable */
2603 case 2: /* defaults */
2604 break; /* supported */
2606 goto saving_not_supp
;
2614 p
+= 4 + (ebd
? 8 : 0);
2616 p
+= 8 + (ebd
? 8 : 0);
2618 pg
= scsicmd
[2] & 0x3f;
2621 * No mode subpages supported (yet) but asking for _all_
2622 * subpages may be valid
2624 if (spg
&& (spg
!= ALL_SUB_MPAGES
)) {
2630 case RW_RECOVERY_MPAGE
:
2631 p
+= ata_msense_rw_recovery(p
, page_control
== 1);
2635 p
+= ata_msense_caching(args
->id
, p
, page_control
== 1);
2639 p
+= ata_msense_control(args
->dev
, p
, page_control
== 1);
2643 p
+= ata_msense_rw_recovery(p
, page_control
== 1);
2644 p
+= ata_msense_caching(args
->id
, p
, page_control
== 1);
2645 p
+= ata_msense_control(args
->dev
, p
, page_control
== 1);
2648 default: /* invalid page code */
2654 if (ata_dev_supports_fua(args
->id
) && (dev
->flags
& ATA_DFLAG_LBA48
) &&
2655 (!(dev
->flags
& ATA_DFLAG_PIO
) || dev
->multi_count
))
2659 rbuf
[0] = p
- rbuf
- 1;
2662 rbuf
[3] = sizeof(sat_blk_desc
);
2663 memcpy(rbuf
+ 4, sat_blk_desc
, sizeof(sat_blk_desc
));
2666 unsigned int output_len
= p
- rbuf
- 2;
2668 rbuf
[0] = output_len
>> 8;
2669 rbuf
[1] = output_len
;
2672 rbuf
[7] = sizeof(sat_blk_desc
);
2673 memcpy(rbuf
+ 8, sat_blk_desc
, sizeof(sat_blk_desc
));
2679 ata_scsi_set_invalid_field(dev
, args
->cmd
, fp
, bp
);
2683 ata_scsi_set_sense(dev
, args
->cmd
, ILLEGAL_REQUEST
, 0x39, 0x0);
2684 /* "Saving parameters not supported" */
2689 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2690 * @args: device IDENTIFY data / SCSI command of interest.
2691 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2693 * Simulate READ CAPACITY commands.
2698 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args
*args
, u8
*rbuf
)
2700 struct ata_device
*dev
= args
->dev
;
2701 u64 last_lba
= dev
->n_sectors
- 1; /* LBA of the last block */
2702 u32 sector_size
; /* physical sector size in bytes */
2706 sector_size
= ata_id_logical_sector_size(dev
->id
);
2707 log2_per_phys
= ata_id_log2_per_physical_sector(dev
->id
);
2708 lowest_aligned
= ata_id_logical_sector_offset(dev
->id
, log2_per_phys
);
2712 if (args
->cmd
->cmnd
[0] == READ_CAPACITY
) {
2713 if (last_lba
>= 0xffffffffULL
)
2714 last_lba
= 0xffffffff;
2716 /* sector count, 32-bit */
2717 rbuf
[0] = last_lba
>> (8 * 3);
2718 rbuf
[1] = last_lba
>> (8 * 2);
2719 rbuf
[2] = last_lba
>> (8 * 1);
2723 rbuf
[4] = sector_size
>> (8 * 3);
2724 rbuf
[5] = sector_size
>> (8 * 2);
2725 rbuf
[6] = sector_size
>> (8 * 1);
2726 rbuf
[7] = sector_size
;
2728 /* sector count, 64-bit */
2729 rbuf
[0] = last_lba
>> (8 * 7);
2730 rbuf
[1] = last_lba
>> (8 * 6);
2731 rbuf
[2] = last_lba
>> (8 * 5);
2732 rbuf
[3] = last_lba
>> (8 * 4);
2733 rbuf
[4] = last_lba
>> (8 * 3);
2734 rbuf
[5] = last_lba
>> (8 * 2);
2735 rbuf
[6] = last_lba
>> (8 * 1);
2739 rbuf
[ 8] = sector_size
>> (8 * 3);
2740 rbuf
[ 9] = sector_size
>> (8 * 2);
2741 rbuf
[10] = sector_size
>> (8 * 1);
2742 rbuf
[11] = sector_size
;
2745 rbuf
[13] = log2_per_phys
;
2746 rbuf
[14] = (lowest_aligned
>> 8) & 0x3f;
2747 rbuf
[15] = lowest_aligned
;
2749 if (ata_id_has_trim(args
->id
) &&
2750 !(dev
->horkage
& ATA_HORKAGE_NOTRIM
)) {
2751 rbuf
[14] |= 0x80; /* LBPME */
2753 if (ata_id_has_zero_after_trim(args
->id
) &&
2754 dev
->horkage
& ATA_HORKAGE_ZERO_AFTER_TRIM
) {
2755 ata_dev_info(dev
, "Enabling discard_zeroes_data\n");
2756 rbuf
[14] |= 0x40; /* LBPRZ */
2759 if (ata_id_zoned_cap(args
->id
) ||
2760 args
->dev
->class == ATA_DEV_ZAC
)
2761 rbuf
[12] = (1 << 4); /* RC_BASIS */
2767 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2768 * @args: device IDENTIFY data / SCSI command of interest.
2769 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2771 * Simulate REPORT LUNS command.
2774 * spin_lock_irqsave(host lock)
2776 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args
*args
, u8
*rbuf
)
2779 rbuf
[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2784 static void atapi_sense_complete(struct ata_queued_cmd
*qc
)
2786 if (qc
->err_mask
&& ((qc
->err_mask
& AC_ERR_DEV
) == 0)) {
2787 /* FIXME: not quite right; we don't want the
2788 * translation of taskfile registers into
2789 * a sense descriptors, since that's only
2790 * correct for ATA, not ATAPI
2792 ata_gen_passthru_sense(qc
);
2798 /* is it pointless to prefer PIO for "safety reasons"? */
2799 static inline int ata_pio_use_silly(struct ata_port
*ap
)
2801 return (ap
->flags
& ATA_FLAG_PIO_DMA
);
2804 static void atapi_request_sense(struct ata_queued_cmd
*qc
)
2806 struct ata_port
*ap
= qc
->ap
;
2807 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2809 DPRINTK("ATAPI request sense\n");
2811 memset(cmd
->sense_buffer
, 0, SCSI_SENSE_BUFFERSIZE
);
2813 #ifdef CONFIG_ATA_SFF
2814 if (ap
->ops
->sff_tf_read
)
2815 ap
->ops
->sff_tf_read(ap
, &qc
->tf
);
2818 /* fill these in, for the case where they are -not- overwritten */
2819 cmd
->sense_buffer
[0] = 0x70;
2820 cmd
->sense_buffer
[2] = qc
->tf
.feature
>> 4;
2824 /* setup sg table and init transfer direction */
2825 sg_init_one(&qc
->sgent
, cmd
->sense_buffer
, SCSI_SENSE_BUFFERSIZE
);
2826 ata_sg_init(qc
, &qc
->sgent
, 1);
2827 qc
->dma_dir
= DMA_FROM_DEVICE
;
2829 memset(&qc
->cdb
, 0, qc
->dev
->cdb_len
);
2830 qc
->cdb
[0] = REQUEST_SENSE
;
2831 qc
->cdb
[4] = SCSI_SENSE_BUFFERSIZE
;
2833 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2834 qc
->tf
.command
= ATA_CMD_PACKET
;
2836 if (ata_pio_use_silly(ap
)) {
2837 qc
->tf
.protocol
= ATAPI_PROT_DMA
;
2838 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
2840 qc
->tf
.protocol
= ATAPI_PROT_PIO
;
2841 qc
->tf
.lbam
= SCSI_SENSE_BUFFERSIZE
;
2844 qc
->nbytes
= SCSI_SENSE_BUFFERSIZE
;
2846 qc
->complete_fn
= atapi_sense_complete
;
2854 * ATAPI devices typically report zero for their SCSI version, and sometimes
2855 * deviate from the spec WRT response data format. If SCSI version is
2856 * reported as zero like normal, then we make the following fixups:
2857 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a
2859 * 2) Ensure response data format / ATAPI information are always correct.
2861 static void atapi_fixup_inquiry(struct scsi_cmnd
*cmd
)
2865 sg_copy_to_buffer(scsi_sglist(cmd
), scsi_sg_count(cmd
), buf
, 4);
2870 sg_copy_from_buffer(scsi_sglist(cmd
), scsi_sg_count(cmd
), buf
, 4);
2873 static void atapi_qc_complete(struct ata_queued_cmd
*qc
)
2875 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2876 unsigned int err_mask
= qc
->err_mask
;
2878 VPRINTK("ENTER, err_mask 0x%X\n", err_mask
);
2880 /* handle completion from new EH */
2881 if (unlikely(qc
->ap
->ops
->error_handler
&&
2882 (err_mask
|| qc
->flags
& ATA_QCFLAG_SENSE_VALID
))) {
2884 if (!(qc
->flags
& ATA_QCFLAG_SENSE_VALID
)) {
2885 /* FIXME: not quite right; we don't want the
2886 * translation of taskfile registers into a
2887 * sense descriptors, since that's only
2888 * correct for ATA, not ATAPI
2890 ata_gen_passthru_sense(qc
);
2893 /* SCSI EH automatically locks door if sdev->locked is
2894 * set. Sometimes door lock request continues to
2895 * fail, for example, when no media is present. This
2896 * creates a loop - SCSI EH issues door lock which
2897 * fails and gets invoked again to acquire sense data
2898 * for the failed command.
2900 * If door lock fails, always clear sdev->locked to
2901 * avoid this infinite loop.
2903 * This may happen before SCSI scan is complete. Make
2904 * sure qc->dev->sdev isn't NULL before dereferencing.
2906 if (qc
->cdb
[0] == ALLOW_MEDIUM_REMOVAL
&& qc
->dev
->sdev
)
2907 qc
->dev
->sdev
->locked
= 0;
2909 qc
->scsicmd
->result
= SAM_STAT_CHECK_CONDITION
;
2914 /* successful completion or old EH failure path */
2915 if (unlikely(err_mask
& AC_ERR_DEV
)) {
2916 cmd
->result
= SAM_STAT_CHECK_CONDITION
;
2917 atapi_request_sense(qc
);
2919 } else if (unlikely(err_mask
)) {
2920 /* FIXME: not quite right; we don't want the
2921 * translation of taskfile registers into
2922 * a sense descriptors, since that's only
2923 * correct for ATA, not ATAPI
2925 ata_gen_passthru_sense(qc
);
2927 if (cmd
->cmnd
[0] == INQUIRY
&& (cmd
->cmnd
[1] & 0x03) == 0)
2928 atapi_fixup_inquiry(cmd
);
2929 cmd
->result
= SAM_STAT_GOOD
;
2935 * atapi_xlat - Initialize PACKET taskfile
2936 * @qc: command structure to be initialized
2939 * spin_lock_irqsave(host lock)
2942 * Zero on success, non-zero on failure.
2944 static unsigned int atapi_xlat(struct ata_queued_cmd
*qc
)
2946 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
2947 struct ata_device
*dev
= qc
->dev
;
2948 int nodata
= (scmd
->sc_data_direction
== DMA_NONE
);
2949 int using_pio
= !nodata
&& (dev
->flags
& ATA_DFLAG_PIO
);
2950 unsigned int nbytes
;
2952 memset(qc
->cdb
, 0, dev
->cdb_len
);
2953 memcpy(qc
->cdb
, scmd
->cmnd
, scmd
->cmd_len
);
2955 qc
->complete_fn
= atapi_qc_complete
;
2957 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2958 if (scmd
->sc_data_direction
== DMA_TO_DEVICE
) {
2959 qc
->tf
.flags
|= ATA_TFLAG_WRITE
;
2960 DPRINTK("direction: write\n");
2963 qc
->tf
.command
= ATA_CMD_PACKET
;
2964 ata_qc_set_pc_nbytes(qc
);
2966 /* check whether ATAPI DMA is safe */
2967 if (!nodata
&& !using_pio
&& atapi_check_dma(qc
))
2970 /* Some controller variants snoop this value for Packet
2971 * transfers to do state machine and FIFO management. Thus we
2972 * want to set it properly, and for DMA where it is
2973 * effectively meaningless.
2975 nbytes
= min(ata_qc_raw_nbytes(qc
), (unsigned int)63 * 1024);
2977 /* Most ATAPI devices which honor transfer chunk size don't
2978 * behave according to the spec when odd chunk size which
2979 * matches the transfer length is specified. If the number of
2980 * bytes to transfer is 2n+1. According to the spec, what
2981 * should happen is to indicate that 2n+1 is going to be
2982 * transferred and transfer 2n+2 bytes where the last byte is
2985 * In practice, this doesn't happen. ATAPI devices first
2986 * indicate and transfer 2n bytes and then indicate and
2987 * transfer 2 bytes where the last byte is padding.
2989 * This inconsistency confuses several controllers which
2990 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2991 * These controllers use actual number of transferred bytes to
2992 * update DMA poitner and transfer of 4n+2 bytes make those
2993 * controller push DMA pointer by 4n+4 bytes because SATA data
2994 * FISes are aligned to 4 bytes. This causes data corruption
2995 * and buffer overrun.
2997 * Always setting nbytes to even number solves this problem
2998 * because then ATAPI devices don't have to split data at 2n
3004 qc
->tf
.lbam
= (nbytes
& 0xFF);
3005 qc
->tf
.lbah
= (nbytes
>> 8);
3008 qc
->tf
.protocol
= ATAPI_PROT_NODATA
;
3010 qc
->tf
.protocol
= ATAPI_PROT_PIO
;
3013 qc
->tf
.protocol
= ATAPI_PROT_DMA
;
3014 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
3016 if ((dev
->flags
& ATA_DFLAG_DMADIR
) &&
3017 (scmd
->sc_data_direction
!= DMA_TO_DEVICE
))
3018 /* some SATA bridges need us to indicate data xfer direction */
3019 qc
->tf
.feature
|= ATAPI_DMADIR
;
3023 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
3024 as ATAPI tape drives don't get this right otherwise */
3028 static struct ata_device
*ata_find_dev(struct ata_port
*ap
, int devno
)
3030 if (!sata_pmp_attached(ap
)) {
3031 if (likely(devno
>= 0 &&
3032 devno
< ata_link_max_devices(&ap
->link
)))
3033 return &ap
->link
.device
[devno
];
3035 if (likely(devno
>= 0 &&
3036 devno
< ap
->nr_pmp_links
))
3037 return &ap
->pmp_link
[devno
].device
[0];
3043 static struct ata_device
*__ata_scsi_find_dev(struct ata_port
*ap
,
3044 const struct scsi_device
*scsidev
)
3048 /* skip commands not addressed to targets we simulate */
3049 if (!sata_pmp_attached(ap
)) {
3050 if (unlikely(scsidev
->channel
|| scsidev
->lun
))
3052 devno
= scsidev
->id
;
3054 if (unlikely(scsidev
->id
|| scsidev
->lun
))
3056 devno
= scsidev
->channel
;
3059 return ata_find_dev(ap
, devno
);
3063 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
3064 * @ap: ATA port to which the device is attached
3065 * @scsidev: SCSI device from which we derive the ATA device
3067 * Given various information provided in struct scsi_cmnd,
3068 * map that onto an ATA bus, and using that mapping
3069 * determine which ata_device is associated with the
3070 * SCSI command to be sent.
3073 * spin_lock_irqsave(host lock)
3076 * Associated ATA device, or %NULL if not found.
3078 static struct ata_device
*
3079 ata_scsi_find_dev(struct ata_port
*ap
, const struct scsi_device
*scsidev
)
3081 struct ata_device
*dev
= __ata_scsi_find_dev(ap
, scsidev
);
3083 if (unlikely(!dev
|| !ata_dev_enabled(dev
)))
3090 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
3091 * @byte1: Byte 1 from pass-thru CDB.
3094 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
3097 ata_scsi_map_proto(u8 byte1
)
3099 switch((byte1
& 0x1e) >> 1) {
3100 case 3: /* Non-data */
3101 return ATA_PROT_NODATA
;
3104 case 10: /* UDMA Data-in */
3105 case 11: /* UDMA Data-Out */
3106 return ATA_PROT_DMA
;
3108 case 4: /* PIO Data-in */
3109 case 5: /* PIO Data-out */
3110 return ATA_PROT_PIO
;
3112 case 12: /* FPDMA */
3113 return ATA_PROT_NCQ
;
3115 case 0: /* Hard Reset */
3117 case 8: /* Device Diagnostic */
3118 case 9: /* Device Reset */
3119 case 7: /* DMA Queued */
3120 case 15: /* Return Response Info */
3121 default: /* Reserved */
3125 return ATA_PROT_UNKNOWN
;
3129 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
3130 * @qc: command structure to be initialized
3132 * Handles either 12, 16, or 32-byte versions of the CDB.
3135 * Zero on success, non-zero on failure.
3137 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd
*qc
)
3139 struct ata_taskfile
*tf
= &(qc
->tf
);
3140 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
3141 struct ata_device
*dev
= qc
->dev
;
3142 const u8
*cdb
= scmd
->cmnd
;
3146 /* 7Fh variable length cmd means a ata pass-thru(32) */
3147 if (cdb
[0] == VARIABLE_LENGTH_CMD
)
3150 tf
->protocol
= ata_scsi_map_proto(cdb
[1 + cdb_offset
]);
3151 if (tf
->protocol
== ATA_PROT_UNKNOWN
) {
3156 if (ata_is_ncq(tf
->protocol
) && (cdb
[2 + cdb_offset
] & 0x3) == 0)
3157 tf
->protocol
= ATA_PROT_NCQ_NODATA
;
3160 tf
->flags
|= ATA_TFLAG_LBA
;
3163 * 12 and 16 byte CDBs use different offsets to
3164 * provide the various register values.
3166 if (cdb
[0] == ATA_16
) {
3168 * 16-byte CDB - may contain extended commands.
3170 * If that is the case, copy the upper byte register values.
3172 if (cdb
[1] & 0x01) {
3173 tf
->hob_feature
= cdb
[3];
3174 tf
->hob_nsect
= cdb
[5];
3175 tf
->hob_lbal
= cdb
[7];
3176 tf
->hob_lbam
= cdb
[9];
3177 tf
->hob_lbah
= cdb
[11];
3178 tf
->flags
|= ATA_TFLAG_LBA48
;
3180 tf
->flags
&= ~ATA_TFLAG_LBA48
;
3183 * Always copy low byte, device and command registers.
3185 tf
->feature
= cdb
[4];
3190 tf
->device
= cdb
[13];
3191 tf
->command
= cdb
[14];
3192 } else if (cdb
[0] == ATA_12
) {
3194 * 12-byte CDB - incapable of extended commands.
3196 tf
->flags
&= ~ATA_TFLAG_LBA48
;
3198 tf
->feature
= cdb
[3];
3203 tf
->device
= cdb
[8];
3204 tf
->command
= cdb
[9];
3207 * 32-byte CDB - may contain extended command fields.
3209 * If that is the case, copy the upper byte register values.
3211 if (cdb
[10] & 0x01) {
3212 tf
->hob_feature
= cdb
[20];
3213 tf
->hob_nsect
= cdb
[22];
3214 tf
->hob_lbal
= cdb
[16];
3215 tf
->hob_lbam
= cdb
[15];
3216 tf
->hob_lbah
= cdb
[14];
3217 tf
->flags
|= ATA_TFLAG_LBA48
;
3219 tf
->flags
&= ~ATA_TFLAG_LBA48
;
3221 tf
->feature
= cdb
[21];
3222 tf
->nsect
= cdb
[23];
3226 tf
->device
= cdb
[24];
3227 tf
->command
= cdb
[25];
3228 tf
->auxiliary
= get_unaligned_be32(&cdb
[28]);
3231 /* For NCQ commands copy the tag value */
3232 if (ata_is_ncq(tf
->protocol
))
3233 tf
->nsect
= qc
->hw_tag
<< 3;
3235 /* enforce correct master/slave bit */
3236 tf
->device
= dev
->devno
?
3237 tf
->device
| ATA_DEV1
: tf
->device
& ~ATA_DEV1
;
3239 switch (tf
->command
) {
3240 /* READ/WRITE LONG use a non-standard sect_size */
3241 case ATA_CMD_READ_LONG
:
3242 case ATA_CMD_READ_LONG_ONCE
:
3243 case ATA_CMD_WRITE_LONG
:
3244 case ATA_CMD_WRITE_LONG_ONCE
:
3245 if (tf
->protocol
!= ATA_PROT_PIO
|| tf
->nsect
!= 1) {
3249 qc
->sect_size
= scsi_bufflen(scmd
);
3252 /* commands using reported Logical Block size (e.g. 512 or 4K) */
3253 case ATA_CMD_CFA_WRITE_NE
:
3254 case ATA_CMD_CFA_TRANS_SECT
:
3255 case ATA_CMD_CFA_WRITE_MULT_NE
:
3256 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
3258 case ATA_CMD_READ_EXT
:
3259 case ATA_CMD_READ_QUEUED
:
3260 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
3261 case ATA_CMD_FPDMA_READ
:
3262 case ATA_CMD_READ_MULTI
:
3263 case ATA_CMD_READ_MULTI_EXT
:
3264 case ATA_CMD_PIO_READ
:
3265 case ATA_CMD_PIO_READ_EXT
:
3266 case ATA_CMD_READ_STREAM_DMA_EXT
:
3267 case ATA_CMD_READ_STREAM_EXT
:
3268 case ATA_CMD_VERIFY
:
3269 case ATA_CMD_VERIFY_EXT
:
3271 case ATA_CMD_WRITE_EXT
:
3272 case ATA_CMD_WRITE_FUA_EXT
:
3273 case ATA_CMD_WRITE_QUEUED
:
3274 case ATA_CMD_WRITE_QUEUED_FUA_EXT
:
3275 case ATA_CMD_FPDMA_WRITE
:
3276 case ATA_CMD_WRITE_MULTI
:
3277 case ATA_CMD_WRITE_MULTI_EXT
:
3278 case ATA_CMD_WRITE_MULTI_FUA_EXT
:
3279 case ATA_CMD_PIO_WRITE
:
3280 case ATA_CMD_PIO_WRITE_EXT
:
3281 case ATA_CMD_WRITE_STREAM_DMA_EXT
:
3282 case ATA_CMD_WRITE_STREAM_EXT
:
3283 qc
->sect_size
= scmd
->device
->sector_size
;
3286 /* Everything else uses 512 byte "sectors" */
3288 qc
->sect_size
= ATA_SECT_SIZE
;
3292 * Set flags so that all registers will be written, pass on
3293 * write indication (used for PIO/DMA setup), result TF is
3294 * copied back and we don't whine too much about its failure.
3296 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
3297 if (scmd
->sc_data_direction
== DMA_TO_DEVICE
)
3298 tf
->flags
|= ATA_TFLAG_WRITE
;
3300 qc
->flags
|= ATA_QCFLAG_RESULT_TF
| ATA_QCFLAG_QUIET
;
3303 * Set transfer length.
3305 * TODO: find out if we need to do more here to
3306 * cover scatter/gather case.
3308 ata_qc_set_pc_nbytes(qc
);
3310 /* We may not issue DMA commands if no DMA mode is set */
3311 if (tf
->protocol
== ATA_PROT_DMA
&& dev
->dma_mode
== 0) {
3316 /* We may not issue NCQ commands to devices not supporting NCQ */
3317 if (ata_is_ncq(tf
->protocol
) && !ata_ncq_enabled(dev
)) {
3322 /* sanity check for pio multi commands */
3323 if ((cdb
[1] & 0xe0) && !is_multi_taskfile(tf
)) {
3328 if (is_multi_taskfile(tf
)) {
3329 unsigned int multi_count
= 1 << (cdb
[1] >> 5);
3331 /* compare the passed through multi_count
3332 * with the cached multi_count of libata
3334 if (multi_count
!= dev
->multi_count
)
3335 ata_dev_warn(dev
, "invalid multi_count %u ignored\n",
3340 * Filter SET_FEATURES - XFER MODE command -- otherwise,
3341 * SET_FEATURES - XFER MODE must be preceded/succeeded
3342 * by an update to hardware-specific registers for each
3343 * controller (i.e. the reason for ->set_piomode(),
3344 * ->set_dmamode(), and ->post_set_mode() hooks).
3346 if (tf
->command
== ATA_CMD_SET_FEATURES
&&
3347 tf
->feature
== SETFEATURES_XFER
) {
3348 fp
= (cdb
[0] == ATA_16
) ? 4 : 3;
3353 * Filter TPM commands by default. These provide an
3354 * essentially uncontrolled encrypted "back door" between
3355 * applications and the disk. Set libata.allow_tpm=1 if you
3356 * have a real reason for wanting to use them. This ensures
3357 * that installed software cannot easily mess stuff up without
3358 * user intent. DVR type users will probably ship with this enabled
3359 * for movie content management.
3361 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
3362 * for this and should do in future but that it is not sufficient as
3363 * DCS is an optional feature set. Thus we also do the software filter
3364 * so that we comply with the TC consortium stated goal that the user
3365 * can turn off TC features of their system.
3367 if (tf
->command
>= 0x5C && tf
->command
<= 0x5F && !libata_allow_tpm
) {
3368 fp
= (cdb
[0] == ATA_16
) ? 14 : 9;
3375 ata_scsi_set_invalid_field(dev
, scmd
, fp
, 0xff);
3380 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim
3381 * @cmd: SCSI command being translated
3382 * @trmax: Maximum number of entries that will fit in sector_size bytes.
3383 * @sector: Starting sector
3384 * @count: Total Range of request in logical sectors
3386 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted
3389 * Upto 64 entries of the format:
3390 * 63:48 Range Length
3393 * Range Length of 0 is ignored.
3394 * LBA's should be sorted order and not overlap.
3396 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET
3398 * Return: Number of bytes copied into sglist.
3400 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd
*cmd
, u32 trmax
,
3401 u64 sector
, u32 count
)
3403 struct scsi_device
*sdp
= cmd
->device
;
3404 size_t len
= sdp
->sector_size
;
3408 unsigned long flags
;
3410 WARN_ON(len
> ATA_SCSI_RBUF_SIZE
);
3412 if (len
> ATA_SCSI_RBUF_SIZE
)
3413 len
= ATA_SCSI_RBUF_SIZE
;
3415 spin_lock_irqsave(&ata_scsi_rbuf_lock
, flags
);
3416 buf
= ((void *)ata_scsi_rbuf
);
3417 memset(buf
, 0, len
);
3419 u64 entry
= sector
|
3420 ((u64
)(count
> 0xffff ? 0xffff : count
) << 48);
3421 buf
[i
++] = __cpu_to_le64(entry
);
3422 if (count
<= 0xffff)
3427 r
= sg_copy_from_buffer(scsi_sglist(cmd
), scsi_sg_count(cmd
), buf
, len
);
3428 spin_unlock_irqrestore(&ata_scsi_rbuf_lock
, flags
);
3434 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same
3435 * @qc: Command to be translated
3437 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or
3438 * an SCT Write Same command.
3439 * Based on WRITE SAME has the UNMAP flag:
3441 * - When set translate to DSM TRIM
3442 * - When clear translate to SCT Write Same
3444 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd
*qc
)
3446 struct ata_taskfile
*tf
= &qc
->tf
;
3447 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
3448 struct scsi_device
*sdp
= scmd
->device
;
3449 size_t len
= sdp
->sector_size
;
3450 struct ata_device
*dev
= qc
->dev
;
3451 const u8
*cdb
= scmd
->cmnd
;
3454 const u32 trmax
= len
>> 3;
3458 u8 unmap
= cdb
[1] & 0x8;
3460 /* we may not issue DMA commands if no DMA mode is set */
3461 if (unlikely(!dev
->dma_mode
))
3462 goto invalid_opcode
;
3465 * We only allow sending this command through the block layer,
3466 * as it modifies the DATA OUT buffer, which would corrupt user
3467 * memory for SG_IO commands.
3469 if (unlikely(blk_rq_is_passthrough(scmd
->request
)))
3470 goto invalid_opcode
;
3472 if (unlikely(scmd
->cmd_len
< 16)) {
3476 scsi_16_lba_len(cdb
, &block
, &n_block
);
3479 (dev
->horkage
& ATA_HORKAGE_NOTRIM
) ||
3480 !ata_id_has_trim(dev
->id
)) {
3485 /* If the request is too large the cmd is invalid */
3486 if (n_block
> 0xffff * trmax
) {
3492 * WRITE SAME always has a sector sized buffer as payload, this
3493 * should never be a multiple entry S/G list.
3495 if (!scsi_sg_count(scmd
))
3496 goto invalid_param_len
;
3499 * size must match sector size in bytes
3500 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count)
3501 * is defined as number of 512 byte blocks to be transferred.
3504 size
= ata_format_dsm_trim_descr(scmd
, trmax
, block
, n_block
);
3506 goto invalid_param_len
;
3508 if (ata_ncq_enabled(dev
) && ata_fpdma_dsm_supported(dev
)) {
3509 /* Newer devices support queued TRIM commands */
3510 tf
->protocol
= ATA_PROT_NCQ
;
3511 tf
->command
= ATA_CMD_FPDMA_SEND
;
3512 tf
->hob_nsect
= ATA_SUBCMD_FPDMA_SEND_DSM
& 0x1f;
3513 tf
->nsect
= qc
->hw_tag
<< 3;
3514 tf
->hob_feature
= (size
/ 512) >> 8;
3515 tf
->feature
= size
/ 512;
3519 tf
->protocol
= ATA_PROT_DMA
;
3520 tf
->hob_feature
= 0;
3521 tf
->feature
= ATA_DSM_TRIM
;
3522 tf
->hob_nsect
= (size
/ 512) >> 8;
3523 tf
->nsect
= size
/ 512;
3524 tf
->command
= ATA_CMD_DSM
;
3527 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_LBA48
|
3530 ata_qc_set_pc_nbytes(qc
);
3535 ata_scsi_set_invalid_field(dev
, scmd
, fp
, bp
);
3538 /* "Parameter list length error" */
3539 ata_scsi_set_sense(dev
, scmd
, ILLEGAL_REQUEST
, 0x1a, 0x0);
3542 /* "Invalid command operation code" */
3543 ata_scsi_set_sense(dev
, scmd
, ILLEGAL_REQUEST
, 0x20, 0x0);
3548 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN
3549 * @args: device MAINTENANCE_IN data / SCSI command of interest.
3550 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
3552 * Yields a subset to satisfy scsi_report_opcode()
3555 * spin_lock_irqsave(host lock)
3557 static unsigned int ata_scsiop_maint_in(struct ata_scsi_args
*args
, u8
*rbuf
)
3559 struct ata_device
*dev
= args
->dev
;
3560 u8
*cdb
= args
->cmd
->cmnd
;
3562 unsigned int err
= 0;
3565 ata_dev_warn(dev
, "invalid command format %d\n", cdb
[2]);
3574 case SERVICE_ACTION_IN_16
:
3577 case SYNCHRONIZE_CACHE
:
3581 case TEST_UNIT_READY
:
3582 case SEND_DIAGNOSTIC
:
3583 case MAINTENANCE_IN
:
3595 case MODE_SELECT_10
:
3601 if (ata_id_zoned_cap(dev
->id
) ||
3602 dev
->class == ATA_DEV_ZAC
)
3605 case SECURITY_PROTOCOL_IN
:
3606 case SECURITY_PROTOCOL_OUT
:
3607 if (dev
->flags
& ATA_DFLAG_TRUSTED
)
3614 rbuf
[1] = supported
; /* supported */
3619 * ata_scsi_report_zones_complete - convert ATA output
3620 * @qc: command structure returning the data
3622 * Convert T-13 little-endian field representation into
3623 * T-10 big-endian field representation.
3626 static void ata_scsi_report_zones_complete(struct ata_queued_cmd
*qc
)
3628 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
3629 struct sg_mapping_iter miter
;
3630 unsigned long flags
;
3631 unsigned int bytes
= 0;
3633 sg_miter_start(&miter
, scsi_sglist(scmd
), scsi_sg_count(scmd
),
3634 SG_MITER_TO_SG
| SG_MITER_ATOMIC
);
3636 local_irq_save(flags
);
3637 while (sg_miter_next(&miter
)) {
3638 unsigned int offset
= 0;
3643 u64 max_lba
, opt_lba
;
3646 /* Swizzle header */
3648 list_length
= get_unaligned_le32(&hdr
[0]);
3649 same
= get_unaligned_le16(&hdr
[4]);
3650 max_lba
= get_unaligned_le64(&hdr
[8]);
3651 opt_lba
= get_unaligned_le64(&hdr
[16]);
3652 put_unaligned_be32(list_length
, &hdr
[0]);
3653 hdr
[4] = same
& 0xf;
3654 put_unaligned_be64(max_lba
, &hdr
[8]);
3655 put_unaligned_be64(opt_lba
, &hdr
[16]);
3659 while (offset
< miter
.length
) {
3661 u8 cond
, type
, non_seq
, reset
;
3662 u64 size
, start
, wp
;
3664 /* Swizzle zone descriptor */
3665 rec
= miter
.addr
+ offset
;
3666 type
= rec
[0] & 0xf;
3667 cond
= (rec
[1] >> 4) & 0xf;
3668 non_seq
= (rec
[1] & 2);
3669 reset
= (rec
[1] & 1);
3670 size
= get_unaligned_le64(&rec
[8]);
3671 start
= get_unaligned_le64(&rec
[16]);
3672 wp
= get_unaligned_le64(&rec
[24]);
3674 rec
[1] = (cond
<< 4) | non_seq
| reset
;
3675 put_unaligned_be64(size
, &rec
[8]);
3676 put_unaligned_be64(start
, &rec
[16]);
3677 put_unaligned_be64(wp
, &rec
[24]);
3678 WARN_ON(offset
+ 64 > miter
.length
);
3683 sg_miter_stop(&miter
);
3684 local_irq_restore(flags
);
3686 ata_scsi_qc_complete(qc
);
3689 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd
*qc
)
3691 struct ata_taskfile
*tf
= &qc
->tf
;
3692 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
3693 const u8
*cdb
= scmd
->cmnd
;
3694 u16 sect
, fp
= (u16
)-1;
3695 u8 sa
, options
, bp
= 0xff;
3699 if (unlikely(scmd
->cmd_len
< 16)) {
3700 ata_dev_warn(qc
->dev
, "invalid cdb length %d\n",
3705 scsi_16_lba_len(cdb
, &block
, &n_block
);
3706 if (n_block
!= scsi_bufflen(scmd
)) {
3707 ata_dev_warn(qc
->dev
, "non-matching transfer count (%d/%d)\n",
3708 n_block
, scsi_bufflen(scmd
));
3709 goto invalid_param_len
;
3712 if (sa
!= ZI_REPORT_ZONES
) {
3713 ata_dev_warn(qc
->dev
, "invalid service action %d\n", sa
);
3718 * ZAC allows only for transfers in 512 byte blocks,
3719 * and uses a 16 bit value for the transfer count.
3721 if ((n_block
/ 512) > 0xffff || n_block
< 512 || (n_block
% 512)) {
3722 ata_dev_warn(qc
->dev
, "invalid transfer count %d\n", n_block
);
3723 goto invalid_param_len
;
3725 sect
= n_block
/ 512;
3726 options
= cdb
[14] & 0xbf;
3728 if (ata_ncq_enabled(qc
->dev
) &&
3729 ata_fpdma_zac_mgmt_in_supported(qc
->dev
)) {
3730 tf
->protocol
= ATA_PROT_NCQ
;
3731 tf
->command
= ATA_CMD_FPDMA_RECV
;
3732 tf
->hob_nsect
= ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN
& 0x1f;
3733 tf
->nsect
= qc
->hw_tag
<< 3;
3734 tf
->feature
= sect
& 0xff;
3735 tf
->hob_feature
= (sect
>> 8) & 0xff;
3736 tf
->auxiliary
= ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES
| (options
<< 8);
3738 tf
->command
= ATA_CMD_ZAC_MGMT_IN
;
3739 tf
->feature
= ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES
;
3740 tf
->protocol
= ATA_PROT_DMA
;
3741 tf
->hob_feature
= options
;
3742 tf
->hob_nsect
= (sect
>> 8) & 0xff;
3743 tf
->nsect
= sect
& 0xff;
3745 tf
->device
= ATA_LBA
;
3746 tf
->lbah
= (block
>> 16) & 0xff;
3747 tf
->lbam
= (block
>> 8) & 0xff;
3748 tf
->lbal
= block
& 0xff;
3749 tf
->hob_lbah
= (block
>> 40) & 0xff;
3750 tf
->hob_lbam
= (block
>> 32) & 0xff;
3751 tf
->hob_lbal
= (block
>> 24) & 0xff;
3753 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_LBA48
;
3754 qc
->flags
|= ATA_QCFLAG_RESULT_TF
;
3756 ata_qc_set_pc_nbytes(qc
);
3758 qc
->complete_fn
= ata_scsi_report_zones_complete
;
3763 ata_scsi_set_invalid_field(qc
->dev
, scmd
, fp
, bp
);
3767 /* "Parameter list length error" */
3768 ata_scsi_set_sense(qc
->dev
, scmd
, ILLEGAL_REQUEST
, 0x1a, 0x0);
3772 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd
*qc
)
3774 struct ata_taskfile
*tf
= &qc
->tf
;
3775 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
3776 struct ata_device
*dev
= qc
->dev
;
3777 const u8
*cdb
= scmd
->cmnd
;
3783 if (unlikely(scmd
->cmd_len
< 16)) {
3789 if ((sa
!= ZO_CLOSE_ZONE
) && (sa
!= ZO_FINISH_ZONE
) &&
3790 (sa
!= ZO_OPEN_ZONE
) && (sa
!= ZO_RESET_WRITE_POINTER
)) {
3795 scsi_16_lba_len(cdb
, &block
, &n_block
);
3798 * ZAC MANAGEMENT OUT doesn't define any length
3800 goto invalid_param_len
;
3803 all
= cdb
[14] & 0x1;
3806 * Ignore the block address (zone ID) as defined by ZBC.
3809 } else if (block
>= dev
->n_sectors
) {
3811 * Block must be a valid zone ID (a zone start LBA).
3817 if (ata_ncq_enabled(qc
->dev
) &&
3818 ata_fpdma_zac_mgmt_out_supported(qc
->dev
)) {
3819 tf
->protocol
= ATA_PROT_NCQ_NODATA
;
3820 tf
->command
= ATA_CMD_NCQ_NON_DATA
;
3821 tf
->feature
= ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT
;
3822 tf
->nsect
= qc
->hw_tag
<< 3;
3823 tf
->auxiliary
= sa
| ((u16
)all
<< 8);
3825 tf
->protocol
= ATA_PROT_NODATA
;
3826 tf
->command
= ATA_CMD_ZAC_MGMT_OUT
;
3828 tf
->hob_feature
= all
;
3830 tf
->lbah
= (block
>> 16) & 0xff;
3831 tf
->lbam
= (block
>> 8) & 0xff;
3832 tf
->lbal
= block
& 0xff;
3833 tf
->hob_lbah
= (block
>> 40) & 0xff;
3834 tf
->hob_lbam
= (block
>> 32) & 0xff;
3835 tf
->hob_lbal
= (block
>> 24) & 0xff;
3836 tf
->device
= ATA_LBA
;
3837 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_LBA48
;
3842 ata_scsi_set_invalid_field(qc
->dev
, scmd
, fp
, 0xff);
3845 /* "Parameter list length error" */
3846 ata_scsi_set_sense(qc
->dev
, scmd
, ILLEGAL_REQUEST
, 0x1a, 0x0);
3851 * ata_mselect_caching - Simulate MODE SELECT for caching info page
3852 * @qc: Storage for translated ATA taskfile
3853 * @buf: input buffer
3854 * @len: number of valid bytes in the input buffer
3855 * @fp: out parameter for the failed field on error
3857 * Prepare a taskfile to modify caching information for the device.
3862 static int ata_mselect_caching(struct ata_queued_cmd
*qc
,
3863 const u8
*buf
, int len
, u16
*fp
)
3865 struct ata_taskfile
*tf
= &qc
->tf
;
3866 struct ata_device
*dev
= qc
->dev
;
3867 u8 mpage
[CACHE_MPAGE_LEN
];
3872 * The first two bytes of def_cache_mpage are a header, so offsets
3873 * in mpage are off by 2 compared to buf. Same for len.
3876 if (len
!= CACHE_MPAGE_LEN
- 2) {
3877 if (len
< CACHE_MPAGE_LEN
- 2)
3880 *fp
= CACHE_MPAGE_LEN
- 2;
3884 wce
= buf
[0] & (1 << 2);
3887 * Check that read-only bits are not modified.
3889 ata_msense_caching(dev
->id
, mpage
, false);
3890 for (i
= 0; i
< CACHE_MPAGE_LEN
- 2; i
++) {
3893 if (mpage
[i
+ 2] != buf
[i
]) {
3899 tf
->flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
3900 tf
->protocol
= ATA_PROT_NODATA
;
3902 tf
->command
= ATA_CMD_SET_FEATURES
;
3903 tf
->feature
= wce
? SETFEATURES_WC_ON
: SETFEATURES_WC_OFF
;
3908 * ata_mselect_control - Simulate MODE SELECT for control page
3909 * @qc: Storage for translated ATA taskfile
3910 * @buf: input buffer
3911 * @len: number of valid bytes in the input buffer
3912 * @fp: out parameter for the failed field on error
3914 * Prepare a taskfile to modify caching information for the device.
3919 static int ata_mselect_control(struct ata_queued_cmd
*qc
,
3920 const u8
*buf
, int len
, u16
*fp
)
3922 struct ata_device
*dev
= qc
->dev
;
3923 u8 mpage
[CONTROL_MPAGE_LEN
];
3928 * The first two bytes of def_control_mpage are a header, so offsets
3929 * in mpage are off by 2 compared to buf. Same for len.
3932 if (len
!= CONTROL_MPAGE_LEN
- 2) {
3933 if (len
< CONTROL_MPAGE_LEN
- 2)
3936 *fp
= CONTROL_MPAGE_LEN
- 2;
3940 d_sense
= buf
[0] & (1 << 2);
3943 * Check that read-only bits are not modified.
3945 ata_msense_control(dev
, mpage
, false);
3946 for (i
= 0; i
< CONTROL_MPAGE_LEN
- 2; i
++) {
3949 if (mpage
[2 + i
] != buf
[i
]) {
3954 if (d_sense
& (1 << 2))
3955 dev
->flags
|= ATA_DFLAG_D_SENSE
;
3957 dev
->flags
&= ~ATA_DFLAG_D_SENSE
;
3962 * ata_scsi_mode_select_xlat - Simulate MODE SELECT 6, 10 commands
3963 * @qc: Storage for translated ATA taskfile
3965 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile.
3966 * Assume this is invoked for direct access devices (e.g. disks) only.
3967 * There should be no block descriptor for other device types.
3970 * spin_lock_irqsave(host lock)
3972 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd
*qc
)
3974 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
3975 const u8
*cdb
= scmd
->cmnd
;
3978 unsigned six_byte
, pg_len
, hdr_len
, bd_len
;
3985 six_byte
= (cdb
[0] == MODE_SELECT
);
3987 if (scmd
->cmd_len
< 5) {
3995 if (scmd
->cmd_len
< 9) {
4000 len
= (cdb
[7] << 8) + cdb
[8];
4004 /* We only support PF=1, SP=0. */
4005 if ((cdb
[1] & 0x11) != 0x10) {
4007 bp
= (cdb
[1] & 0x01) ? 1 : 5;
4011 /* Test early for possible overrun. */
4012 if (!scsi_sg_count(scmd
) || scsi_sglist(scmd
)->length
< len
)
4013 goto invalid_param_len
;
4015 p
= page_address(sg_page(scsi_sglist(scmd
)));
4017 /* Move past header and block descriptors. */
4019 goto invalid_param_len
;
4024 bd_len
= (p
[6] << 8) + p
[7];
4029 goto invalid_param_len
;
4030 if (bd_len
!= 0 && bd_len
!= 8) {
4031 fp
= (six_byte
) ? 3 : 6;
4032 fp
+= bd_len
+ hdr_len
;
4041 /* Parse both possible formats for the mode page headers. */
4045 goto invalid_param_len
;
4048 pg_len
= (p
[2] << 8) | p
[3];
4053 goto invalid_param_len
;
4062 * No mode subpages supported (yet) but asking for _all_
4063 * subpages may be valid
4065 if (spg
&& (spg
!= ALL_SUB_MPAGES
)) {
4066 fp
= (p
[0] & 0x40) ? 1 : 0;
4067 fp
+= hdr_len
+ bd_len
;
4071 goto invalid_param_len
;
4075 if (ata_mselect_caching(qc
, p
, pg_len
, &fp
) < 0) {
4076 fp
+= hdr_len
+ bd_len
;
4081 if (ata_mselect_control(qc
, p
, pg_len
, &fp
) < 0) {
4082 fp
+= hdr_len
+ bd_len
;
4085 goto skip
; /* No ATA command to send */
4088 default: /* invalid page code */
4089 fp
= bd_len
+ hdr_len
;
4094 * Only one page has changeable data, so we only support setting one
4103 ata_scsi_set_invalid_field(qc
->dev
, scmd
, fp
, bp
);
4107 ata_scsi_set_invalid_parameter(qc
->dev
, scmd
, fp
);
4111 /* "Parameter list length error" */
4112 ata_scsi_set_sense(qc
->dev
, scmd
, ILLEGAL_REQUEST
, 0x1a, 0x0);
4116 scmd
->result
= SAM_STAT_GOOD
;
4120 static u8
ata_scsi_trusted_op(u32 len
, bool send
, bool dma
)
4123 return ATA_CMD_TRUSTED_NONDATA
;
4125 return dma
? ATA_CMD_TRUSTED_SND_DMA
: ATA_CMD_TRUSTED_SND
;
4127 return dma
? ATA_CMD_TRUSTED_RCV_DMA
: ATA_CMD_TRUSTED_RCV
;
4130 static unsigned int ata_scsi_security_inout_xlat(struct ata_queued_cmd
*qc
)
4132 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
4133 const u8
*cdb
= scmd
->cmnd
;
4134 struct ata_taskfile
*tf
= &qc
->tf
;
4136 bool send
= (cdb
[0] == SECURITY_PROTOCOL_OUT
);
4137 u16 spsp
= get_unaligned_be16(&cdb
[2]);
4138 u32 len
= get_unaligned_be32(&cdb
[6]);
4139 bool dma
= !(qc
->dev
->flags
& ATA_DFLAG_PIO
);
4142 * We don't support the ATA "security" protocol.
4145 ata_scsi_set_invalid_field(qc
->dev
, scmd
, 1, 0);
4149 if (cdb
[4] & 7) { /* INC_512 */
4151 ata_scsi_set_invalid_field(qc
->dev
, scmd
, 6, 0);
4155 if (len
> 0x01fffe00) {
4156 ata_scsi_set_invalid_field(qc
->dev
, scmd
, 6, 0);
4160 /* convert to the sector-based ATA addressing */
4161 len
= (len
+ 511) / 512;
4164 tf
->protocol
= dma
? ATA_PROT_DMA
: ATA_PROT_PIO
;
4165 tf
->flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
| ATA_TFLAG_LBA
;
4167 tf
->flags
|= ATA_TFLAG_WRITE
;
4168 tf
->command
= ata_scsi_trusted_op(len
, send
, dma
);
4170 tf
->lbam
= spsp
& 0xff;
4171 tf
->lbah
= spsp
>> 8;
4174 tf
->nsect
= len
& 0xff;
4175 tf
->lbal
= len
>> 8;
4178 tf
->lbah
= (1 << 7);
4181 ata_qc_set_pc_nbytes(qc
);
4186 * ata_scsi_var_len_cdb_xlat - SATL variable length CDB to Handler
4187 * @qc: Command to be translated
4189 * Translate a SCSI variable length CDB to specified commands.
4190 * It checks a service action value in CDB to call corresponding handler.
4193 * Zero on success, non-zero on failure
4196 static unsigned int ata_scsi_var_len_cdb_xlat(struct ata_queued_cmd
*qc
)
4198 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
4199 const u8
*cdb
= scmd
->cmnd
;
4200 const u16 sa
= get_unaligned_be16(&cdb
[8]);
4203 * if service action represents a ata pass-thru(32) command,
4204 * then pass it to ata_scsi_pass_thru handler.
4207 return ata_scsi_pass_thru(qc
);
4209 /* unsupported service action */
4214 * ata_get_xlat_func - check if SCSI to ATA translation is possible
4216 * @cmd: SCSI command opcode to consider
4218 * Look up the SCSI command given, and determine whether the
4219 * SCSI command is to be translated or simulated.
4222 * Pointer to translation function if possible, %NULL if not.
4225 static inline ata_xlat_func_t
ata_get_xlat_func(struct ata_device
*dev
, u8 cmd
)
4235 return ata_scsi_rw_xlat
;
4238 return ata_scsi_write_same_xlat
;
4240 case SYNCHRONIZE_CACHE
:
4241 if (ata_try_flush_cache(dev
))
4242 return ata_scsi_flush_xlat
;
4247 return ata_scsi_verify_xlat
;
4251 return ata_scsi_pass_thru
;
4253 case VARIABLE_LENGTH_CMD
:
4254 return ata_scsi_var_len_cdb_xlat
;
4257 case MODE_SELECT_10
:
4258 return ata_scsi_mode_select_xlat
;
4262 return ata_scsi_zbc_in_xlat
;
4265 return ata_scsi_zbc_out_xlat
;
4267 case SECURITY_PROTOCOL_IN
:
4268 case SECURITY_PROTOCOL_OUT
:
4269 if (!(dev
->flags
& ATA_DFLAG_TRUSTED
))
4271 return ata_scsi_security_inout_xlat
;
4274 return ata_scsi_start_stop_xlat
;
4281 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
4282 * @ap: ATA port to which the command was being sent
4283 * @cmd: SCSI command to dump
4285 * Prints the contents of a SCSI command via printk().
4288 static inline void ata_scsi_dump_cdb(struct ata_port
*ap
,
4289 struct scsi_cmnd
*cmd
)
4292 struct scsi_device
*scsidev
= cmd
->device
;
4294 DPRINTK("CDB (%u:%d,%d,%lld) %9ph\n",
4296 scsidev
->channel
, scsidev
->id
, scsidev
->lun
,
4301 static inline int __ata_scsi_queuecmd(struct scsi_cmnd
*scmd
,
4302 struct ata_device
*dev
)
4304 u8 scsi_op
= scmd
->cmnd
[0];
4305 ata_xlat_func_t xlat_func
;
4308 if (dev
->class == ATA_DEV_ATA
|| dev
->class == ATA_DEV_ZAC
) {
4309 if (unlikely(!scmd
->cmd_len
|| scmd
->cmd_len
> dev
->cdb_len
))
4312 xlat_func
= ata_get_xlat_func(dev
, scsi_op
);
4314 if (unlikely(!scmd
->cmd_len
))
4318 if (likely((scsi_op
!= ATA_16
) || !atapi_passthru16
)) {
4319 /* relay SCSI command to ATAPI device */
4320 int len
= COMMAND_SIZE(scsi_op
);
4321 if (unlikely(len
> scmd
->cmd_len
||
4322 len
> dev
->cdb_len
||
4323 scmd
->cmd_len
> ATAPI_CDB_LEN
))
4326 xlat_func
= atapi_xlat
;
4328 /* ATA_16 passthru, treat as an ATA command */
4329 if (unlikely(scmd
->cmd_len
> 16))
4332 xlat_func
= ata_get_xlat_func(dev
, scsi_op
);
4337 rc
= ata_scsi_translate(dev
, scmd
, xlat_func
);
4339 ata_scsi_simulate(dev
, scmd
);
4344 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
4345 scmd
->cmd_len
, scsi_op
, dev
->cdb_len
);
4346 scmd
->result
= DID_ERROR
<< 16;
4347 scmd
->scsi_done(scmd
);
4352 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
4353 * @shost: SCSI host of command to be sent
4354 * @cmd: SCSI command to be sent
4356 * In some cases, this function translates SCSI commands into
4357 * ATA taskfiles, and queues the taskfiles to be sent to
4358 * hardware. In other cases, this function simulates a
4359 * SCSI device by evaluating and responding to certain
4360 * SCSI commands. This creates the overall effect of
4361 * ATA and ATAPI devices appearing as SCSI devices.
4367 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
4370 int ata_scsi_queuecmd(struct Scsi_Host
*shost
, struct scsi_cmnd
*cmd
)
4372 struct ata_port
*ap
;
4373 struct ata_device
*dev
;
4374 struct scsi_device
*scsidev
= cmd
->device
;
4376 unsigned long irq_flags
;
4378 ap
= ata_shost_to_port(shost
);
4380 spin_lock_irqsave(ap
->lock
, irq_flags
);
4382 ata_scsi_dump_cdb(ap
, cmd
);
4384 dev
= ata_scsi_find_dev(ap
, scsidev
);
4386 rc
= __ata_scsi_queuecmd(cmd
, dev
);
4388 cmd
->result
= (DID_BAD_TARGET
<< 16);
4389 cmd
->scsi_done(cmd
);
4392 spin_unlock_irqrestore(ap
->lock
, irq_flags
);
4398 * ata_scsi_simulate - simulate SCSI command on ATA device
4399 * @dev: the target device
4400 * @cmd: SCSI command being sent to device.
4402 * Interprets and directly executes a select list of SCSI commands
4403 * that can be handled internally.
4406 * spin_lock_irqsave(host lock)
4409 void ata_scsi_simulate(struct ata_device
*dev
, struct scsi_cmnd
*cmd
)
4411 struct ata_scsi_args args
;
4412 const u8
*scsicmd
= cmd
->cmnd
;
4419 switch(scsicmd
[0]) {
4421 if (scsicmd
[1] & 2) /* is CmdDt set? */
4422 ata_scsi_set_invalid_field(dev
, cmd
, 1, 0xff);
4423 else if ((scsicmd
[1] & 1) == 0) /* is EVPD clear? */
4424 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_std
);
4425 else switch (scsicmd
[2]) {
4427 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_00
);
4430 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_80
);
4433 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_83
);
4436 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_89
);
4439 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_b0
);
4442 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_b1
);
4445 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_b2
);
4448 if (dev
->flags
& ATA_DFLAG_ZAC
) {
4449 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_b6
);
4454 ata_scsi_set_invalid_field(dev
, cmd
, 2, 0xff);
4461 ata_scsi_rbuf_fill(&args
, ata_scsiop_mode_sense
);
4465 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
4468 case SERVICE_ACTION_IN_16
:
4469 if ((scsicmd
[1] & 0x1f) == SAI_READ_CAPACITY_16
)
4470 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
4472 ata_scsi_set_invalid_field(dev
, cmd
, 1, 0xff);
4476 ata_scsi_rbuf_fill(&args
, ata_scsiop_report_luns
);
4480 ata_scsi_set_sense(dev
, cmd
, 0, 0, 0);
4481 cmd
->result
= (DRIVER_SENSE
<< 24);
4484 /* if we reach this, then writeback caching is disabled,
4485 * turning this into a no-op.
4487 case SYNCHRONIZE_CACHE
:
4490 /* no-op's, complete with success */
4494 case TEST_UNIT_READY
:
4497 case SEND_DIAGNOSTIC
:
4498 tmp8
= scsicmd
[1] & ~(1 << 3);
4499 if (tmp8
!= 0x4 || scsicmd
[3] || scsicmd
[4])
4500 ata_scsi_set_invalid_field(dev
, cmd
, 1, 0xff);
4503 case MAINTENANCE_IN
:
4504 if (scsicmd
[1] == MI_REPORT_SUPPORTED_OPERATION_CODES
)
4505 ata_scsi_rbuf_fill(&args
, ata_scsiop_maint_in
);
4507 ata_scsi_set_invalid_field(dev
, cmd
, 1, 0xff);
4510 /* all other commands */
4512 ata_scsi_set_sense(dev
, cmd
, ILLEGAL_REQUEST
, 0x20, 0x0);
4513 /* "Invalid command operation code" */
4517 cmd
->scsi_done(cmd
);
4520 int ata_scsi_add_hosts(struct ata_host
*host
, struct scsi_host_template
*sht
)
4524 for (i
= 0; i
< host
->n_ports
; i
++) {
4525 struct ata_port
*ap
= host
->ports
[i
];
4526 struct Scsi_Host
*shost
;
4529 shost
= scsi_host_alloc(sht
, sizeof(struct ata_port
*));
4533 shost
->eh_noresume
= 1;
4534 *(struct ata_port
**)&shost
->hostdata
[0] = ap
;
4535 ap
->scsi_host
= shost
;
4537 shost
->transportt
= ata_scsi_transport_template
;
4538 shost
->unique_id
= ap
->print_id
;
4541 shost
->max_channel
= 1;
4542 shost
->max_cmd_len
= 32;
4544 /* Schedule policy is determined by ->qc_defer()
4545 * callback and it needs to see every deferred qc.
4546 * Set host_blocked to 1 to prevent SCSI midlayer from
4547 * automatically deferring requests.
4549 shost
->max_host_blocked
= 1;
4551 rc
= scsi_add_host_with_dma(ap
->scsi_host
,
4552 &ap
->tdev
, ap
->host
->dev
);
4560 scsi_host_put(host
->ports
[i
]->scsi_host
);
4563 struct Scsi_Host
*shost
= host
->ports
[i
]->scsi_host
;
4565 scsi_remove_host(shost
);
4566 scsi_host_put(shost
);
4571 void ata_scsi_scan_host(struct ata_port
*ap
, int sync
)
4574 struct ata_device
*last_failed_dev
= NULL
;
4575 struct ata_link
*link
;
4576 struct ata_device
*dev
;
4579 ata_for_each_link(link
, ap
, EDGE
) {
4580 ata_for_each_dev(dev
, link
, ENABLED
) {
4581 struct scsi_device
*sdev
;
4582 int channel
= 0, id
= 0;
4587 if (ata_is_host_link(link
))
4590 channel
= link
->pmp
;
4592 sdev
= __scsi_add_device(ap
->scsi_host
, channel
, id
, 0,
4594 if (!IS_ERR(sdev
)) {
4596 scsi_device_put(sdev
);
4603 /* If we scanned while EH was in progress or allocation
4604 * failure occurred, scan would have failed silently. Check
4605 * whether all devices are attached.
4607 ata_for_each_link(link
, ap
, EDGE
) {
4608 ata_for_each_dev(dev
, link
, ENABLED
) {
4617 /* we're missing some SCSI devices */
4619 /* If caller requested synchrnous scan && we've made
4620 * any progress, sleep briefly and repeat.
4622 if (dev
!= last_failed_dev
) {
4624 last_failed_dev
= dev
;
4628 /* We might be failing to detect boot device, give it
4629 * a few more chances.
4637 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n");
4640 queue_delayed_work(system_long_wq
, &ap
->hotplug_task
,
4641 round_jiffies_relative(HZ
));
4645 * ata_scsi_offline_dev - offline attached SCSI device
4646 * @dev: ATA device to offline attached SCSI device for
4648 * This function is called from ata_eh_hotplug() and responsible
4649 * for taking the SCSI device attached to @dev offline. This
4650 * function is called with host lock which protects dev->sdev
4654 * spin_lock_irqsave(host lock)
4657 * 1 if attached SCSI device exists, 0 otherwise.
4659 int ata_scsi_offline_dev(struct ata_device
*dev
)
4662 scsi_device_set_state(dev
->sdev
, SDEV_OFFLINE
);
4669 * ata_scsi_remove_dev - remove attached SCSI device
4670 * @dev: ATA device to remove attached SCSI device for
4672 * This function is called from ata_eh_scsi_hotplug() and
4673 * responsible for removing the SCSI device attached to @dev.
4676 * Kernel thread context (may sleep).
4678 static void ata_scsi_remove_dev(struct ata_device
*dev
)
4680 struct ata_port
*ap
= dev
->link
->ap
;
4681 struct scsi_device
*sdev
;
4682 unsigned long flags
;
4684 /* Alas, we need to grab scan_mutex to ensure SCSI device
4685 * state doesn't change underneath us and thus
4686 * scsi_device_get() always succeeds. The mutex locking can
4687 * be removed if there is __scsi_device_get() interface which
4688 * increments reference counts regardless of device state.
4690 mutex_lock(&ap
->scsi_host
->scan_mutex
);
4691 spin_lock_irqsave(ap
->lock
, flags
);
4693 /* clearing dev->sdev is protected by host lock */
4698 /* If user initiated unplug races with us, sdev can go
4699 * away underneath us after the host lock and
4700 * scan_mutex are released. Hold onto it.
4702 if (scsi_device_get(sdev
) == 0) {
4703 /* The following ensures the attached sdev is
4704 * offline on return from ata_scsi_offline_dev()
4705 * regardless it wins or loses the race
4706 * against this function.
4708 scsi_device_set_state(sdev
, SDEV_OFFLINE
);
4715 spin_unlock_irqrestore(ap
->lock
, flags
);
4716 mutex_unlock(&ap
->scsi_host
->scan_mutex
);
4719 ata_dev_info(dev
, "detaching (SCSI %s)\n",
4720 dev_name(&sdev
->sdev_gendev
));
4722 scsi_remove_device(sdev
);
4723 scsi_device_put(sdev
);
4727 static void ata_scsi_handle_link_detach(struct ata_link
*link
)
4729 struct ata_port
*ap
= link
->ap
;
4730 struct ata_device
*dev
;
4732 ata_for_each_dev(dev
, link
, ALL
) {
4733 unsigned long flags
;
4735 if (!(dev
->flags
& ATA_DFLAG_DETACHED
))
4738 spin_lock_irqsave(ap
->lock
, flags
);
4739 dev
->flags
&= ~ATA_DFLAG_DETACHED
;
4740 spin_unlock_irqrestore(ap
->lock
, flags
);
4742 if (zpodd_dev_enabled(dev
))
4745 ata_scsi_remove_dev(dev
);
4750 * ata_scsi_media_change_notify - send media change event
4751 * @dev: Pointer to the disk device with media change event
4753 * Tell the block layer to send a media change notification
4757 * spin_lock_irqsave(host lock)
4759 void ata_scsi_media_change_notify(struct ata_device
*dev
)
4762 sdev_evt_send_simple(dev
->sdev
, SDEV_EVT_MEDIA_CHANGE
,
4767 * ata_scsi_hotplug - SCSI part of hotplug
4768 * @work: Pointer to ATA port to perform SCSI hotplug on
4770 * Perform SCSI part of hotplug. It's executed from a separate
4771 * workqueue after EH completes. This is necessary because SCSI
4772 * hot plugging requires working EH and hot unplugging is
4773 * synchronized with hot plugging with a mutex.
4776 * Kernel thread context (may sleep).
4778 void ata_scsi_hotplug(struct work_struct
*work
)
4780 struct ata_port
*ap
=
4781 container_of(work
, struct ata_port
, hotplug_task
.work
);
4784 if (ap
->pflags
& ATA_PFLAG_UNLOADING
) {
4785 DPRINTK("ENTER/EXIT - unloading\n");
4792 * The block layer suspend/resume path is fundamentally broken due
4793 * to freezable kthreads and workqueue and may deadlock if a block
4794 * device gets removed while resume is in progress. I don't know
4795 * what the solution is short of removing freezable kthreads and
4796 * workqueues altogether.
4798 * The following is an ugly hack to avoid kicking off device
4799 * removal while freezer is active. This is a joke but does avoid
4800 * this particular deadlock scenario.
4802 * https://bugzilla.kernel.org/show_bug.cgi?id=62801
4803 * http://marc.info/?l=linux-kernel&m=138695698516487
4805 #ifdef CONFIG_FREEZER
4811 mutex_lock(&ap
->scsi_scan_mutex
);
4813 /* Unplug detached devices. We cannot use link iterator here
4814 * because PMP links have to be scanned even if PMP is
4815 * currently not attached. Iterate manually.
4817 ata_scsi_handle_link_detach(&ap
->link
);
4819 for (i
= 0; i
< SATA_PMP_MAX_PORTS
; i
++)
4820 ata_scsi_handle_link_detach(&ap
->pmp_link
[i
]);
4822 /* scan for new ones */
4823 ata_scsi_scan_host(ap
, 0);
4825 mutex_unlock(&ap
->scsi_scan_mutex
);
4830 * ata_scsi_user_scan - indication for user-initiated bus scan
4831 * @shost: SCSI host to scan
4832 * @channel: Channel to scan
4836 * This function is called when user explicitly requests bus
4837 * scan. Set probe pending flag and invoke EH.
4840 * SCSI layer (we don't care)
4845 int ata_scsi_user_scan(struct Scsi_Host
*shost
, unsigned int channel
,
4846 unsigned int id
, u64 lun
)
4848 struct ata_port
*ap
= ata_shost_to_port(shost
);
4849 unsigned long flags
;
4852 if (!ap
->ops
->error_handler
)
4855 if (lun
!= SCAN_WILD_CARD
&& lun
)
4858 if (!sata_pmp_attached(ap
)) {
4859 if (channel
!= SCAN_WILD_CARD
&& channel
)
4863 if (id
!= SCAN_WILD_CARD
&& id
)
4868 spin_lock_irqsave(ap
->lock
, flags
);
4870 if (devno
== SCAN_WILD_CARD
) {
4871 struct ata_link
*link
;
4873 ata_for_each_link(link
, ap
, EDGE
) {
4874 struct ata_eh_info
*ehi
= &link
->eh_info
;
4875 ehi
->probe_mask
|= ATA_ALL_DEVICES
;
4876 ehi
->action
|= ATA_EH_RESET
;
4879 struct ata_device
*dev
= ata_find_dev(ap
, devno
);
4882 struct ata_eh_info
*ehi
= &dev
->link
->eh_info
;
4883 ehi
->probe_mask
|= 1 << dev
->devno
;
4884 ehi
->action
|= ATA_EH_RESET
;
4890 ata_port_schedule_eh(ap
);
4891 spin_unlock_irqrestore(ap
->lock
, flags
);
4892 ata_port_wait_eh(ap
);
4894 spin_unlock_irqrestore(ap
->lock
, flags
);
4900 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
4901 * @work: Pointer to ATA port to perform scsi_rescan_device()
4903 * After ATA pass thru (SAT) commands are executed successfully,
4904 * libata need to propagate the changes to SCSI layer.
4907 * Kernel thread context (may sleep).
4909 void ata_scsi_dev_rescan(struct work_struct
*work
)
4911 struct ata_port
*ap
=
4912 container_of(work
, struct ata_port
, scsi_rescan_task
);
4913 struct ata_link
*link
;
4914 struct ata_device
*dev
;
4915 unsigned long flags
;
4917 mutex_lock(&ap
->scsi_scan_mutex
);
4918 spin_lock_irqsave(ap
->lock
, flags
);
4920 ata_for_each_link(link
, ap
, EDGE
) {
4921 ata_for_each_dev(dev
, link
, ENABLED
) {
4922 struct scsi_device
*sdev
= dev
->sdev
;
4926 if (scsi_device_get(sdev
))
4929 spin_unlock_irqrestore(ap
->lock
, flags
);
4930 scsi_rescan_device(&(sdev
->sdev_gendev
));
4931 scsi_device_put(sdev
);
4932 spin_lock_irqsave(ap
->lock
, flags
);
4936 spin_unlock_irqrestore(ap
->lock
, flags
);
4937 mutex_unlock(&ap
->scsi_scan_mutex
);
4941 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
4942 * @host: ATA host container for all SAS ports
4943 * @port_info: Information from low-level host driver
4944 * @shost: SCSI host that the scsi device is attached to
4947 * PCI/etc. bus probe sem.
4950 * ata_port pointer on success / NULL on failure.
4953 struct ata_port
*ata_sas_port_alloc(struct ata_host
*host
,
4954 struct ata_port_info
*port_info
,
4955 struct Scsi_Host
*shost
)
4957 struct ata_port
*ap
;
4959 ap
= ata_port_alloc(host
);
4964 ap
->lock
= &host
->lock
;
4965 ap
->pio_mask
= port_info
->pio_mask
;
4966 ap
->mwdma_mask
= port_info
->mwdma_mask
;
4967 ap
->udma_mask
= port_info
->udma_mask
;
4968 ap
->flags
|= port_info
->flags
;
4969 ap
->ops
= port_info
->port_ops
;
4970 ap
->cbl
= ATA_CBL_SATA
;
4974 EXPORT_SYMBOL_GPL(ata_sas_port_alloc
);
4977 * ata_sas_port_start - Set port up for dma.
4978 * @ap: Port to initialize
4980 * Called just after data structures for each port are
4983 * May be used as the port_start() entry in ata_port_operations.
4986 * Inherited from caller.
4988 int ata_sas_port_start(struct ata_port
*ap
)
4991 * the port is marked as frozen at allocation time, but if we don't
4992 * have new eh, we won't thaw it
4994 if (!ap
->ops
->error_handler
)
4995 ap
->pflags
&= ~ATA_PFLAG_FROZEN
;
4998 EXPORT_SYMBOL_GPL(ata_sas_port_start
);
5001 * ata_port_stop - Undo ata_sas_port_start()
5002 * @ap: Port to shut down
5004 * May be used as the port_stop() entry in ata_port_operations.
5007 * Inherited from caller.
5010 void ata_sas_port_stop(struct ata_port
*ap
)
5013 EXPORT_SYMBOL_GPL(ata_sas_port_stop
);
5016 * ata_sas_async_probe - simply schedule probing and return
5017 * @ap: Port to probe
5019 * For batch scheduling of probe for sas attached ata devices, assumes
5020 * the port has already been through ata_sas_port_init()
5022 void ata_sas_async_probe(struct ata_port
*ap
)
5024 __ata_port_probe(ap
);
5026 EXPORT_SYMBOL_GPL(ata_sas_async_probe
);
5028 int ata_sas_sync_probe(struct ata_port
*ap
)
5030 return ata_port_probe(ap
);
5032 EXPORT_SYMBOL_GPL(ata_sas_sync_probe
);
5036 * ata_sas_port_init - Initialize a SATA device
5037 * @ap: SATA port to initialize
5040 * PCI/etc. bus probe sem.
5043 * Zero on success, non-zero on error.
5046 int ata_sas_port_init(struct ata_port
*ap
)
5048 int rc
= ap
->ops
->port_start(ap
);
5052 ap
->print_id
= atomic_inc_return(&ata_print_id
);
5055 EXPORT_SYMBOL_GPL(ata_sas_port_init
);
5057 int ata_sas_tport_add(struct device
*parent
, struct ata_port
*ap
)
5059 return ata_tport_add(parent
, ap
);
5061 EXPORT_SYMBOL_GPL(ata_sas_tport_add
);
5063 void ata_sas_tport_delete(struct ata_port
*ap
)
5065 ata_tport_delete(ap
);
5067 EXPORT_SYMBOL_GPL(ata_sas_tport_delete
);
5070 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
5071 * @ap: SATA port to destroy
5075 void ata_sas_port_destroy(struct ata_port
*ap
)
5077 if (ap
->ops
->port_stop
)
5078 ap
->ops
->port_stop(ap
);
5081 EXPORT_SYMBOL_GPL(ata_sas_port_destroy
);
5084 * ata_sas_slave_configure - Default slave_config routine for libata devices
5085 * @sdev: SCSI device to configure
5086 * @ap: ATA port to which SCSI device is attached
5092 int ata_sas_slave_configure(struct scsi_device
*sdev
, struct ata_port
*ap
)
5094 ata_scsi_sdev_config(sdev
);
5095 ata_scsi_dev_config(sdev
, ap
->link
.device
);
5098 EXPORT_SYMBOL_GPL(ata_sas_slave_configure
);
5101 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
5102 * @cmd: SCSI command to be sent
5103 * @ap: ATA port to which the command is being sent
5106 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
5110 int ata_sas_queuecmd(struct scsi_cmnd
*cmd
, struct ata_port
*ap
)
5114 ata_scsi_dump_cdb(ap
, cmd
);
5116 if (likely(ata_dev_enabled(ap
->link
.device
)))
5117 rc
= __ata_scsi_queuecmd(cmd
, ap
->link
.device
);
5119 cmd
->result
= (DID_BAD_TARGET
<< 16);
5120 cmd
->scsi_done(cmd
);
5124 EXPORT_SYMBOL_GPL(ata_sas_queuecmd
);
5126 int ata_sas_allocate_tag(struct ata_port
*ap
)
5128 unsigned int max_queue
= ap
->host
->n_tags
;
5129 unsigned int i
, tag
;
5131 for (i
= 0, tag
= ap
->sas_last_tag
+ 1; i
< max_queue
; i
++, tag
++) {
5132 tag
= tag
< max_queue
? tag
: 0;
5134 /* the last tag is reserved for internal command. */
5135 if (ata_tag_internal(tag
))
5138 if (!test_and_set_bit(tag
, &ap
->sas_tag_allocated
)) {
5139 ap
->sas_last_tag
= tag
;
5146 void ata_sas_free_tag(unsigned int tag
, struct ata_port
*ap
)
5148 clear_bit(tag
, &ap
->sas_tag_allocated
);