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_WITH_PARTIAL
] = "min_power_with_partial",
114 [ATA_LPM_MIN_POWER
] = "min_power",
117 static ssize_t
ata_scsi_lpm_store(struct device
*device
,
118 struct device_attribute
*attr
,
119 const char *buf
, size_t count
)
121 struct Scsi_Host
*shost
= class_to_shost(device
);
122 struct ata_port
*ap
= ata_shost_to_port(shost
);
123 struct ata_link
*link
;
124 struct ata_device
*dev
;
125 enum ata_lpm_policy policy
;
128 /* UNKNOWN is internal state, iterate from MAX_POWER */
129 for (policy
= ATA_LPM_MAX_POWER
;
130 policy
< ARRAY_SIZE(ata_lpm_policy_names
); policy
++) {
131 const char *name
= ata_lpm_policy_names
[policy
];
133 if (strncmp(name
, buf
, strlen(name
)) == 0)
136 if (policy
== ARRAY_SIZE(ata_lpm_policy_names
))
139 spin_lock_irqsave(ap
->lock
, flags
);
141 ata_for_each_link(link
, ap
, EDGE
) {
142 ata_for_each_dev(dev
, &ap
->link
, ENABLED
) {
143 if (dev
->horkage
& ATA_HORKAGE_NOLPM
) {
150 ap
->target_lpm_policy
= policy
;
151 ata_port_schedule_eh(ap
);
153 spin_unlock_irqrestore(ap
->lock
, flags
);
157 static ssize_t
ata_scsi_lpm_show(struct device
*dev
,
158 struct device_attribute
*attr
, char *buf
)
160 struct Scsi_Host
*shost
= class_to_shost(dev
);
161 struct ata_port
*ap
= ata_shost_to_port(shost
);
163 if (ap
->target_lpm_policy
>= ARRAY_SIZE(ata_lpm_policy_names
))
166 return snprintf(buf
, PAGE_SIZE
, "%s\n",
167 ata_lpm_policy_names
[ap
->target_lpm_policy
]);
169 DEVICE_ATTR(link_power_management_policy
, S_IRUGO
| S_IWUSR
,
170 ata_scsi_lpm_show
, ata_scsi_lpm_store
);
171 EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy
);
173 static ssize_t
ata_scsi_park_show(struct device
*device
,
174 struct device_attribute
*attr
, char *buf
)
176 struct scsi_device
*sdev
= to_scsi_device(device
);
178 struct ata_link
*link
;
179 struct ata_device
*dev
;
181 unsigned int uninitialized_var(msecs
);
184 ap
= ata_shost_to_port(sdev
->host
);
186 spin_lock_irq(ap
->lock
);
187 dev
= ata_scsi_find_dev(ap
, sdev
);
192 if (dev
->flags
& ATA_DFLAG_NO_UNLOAD
) {
199 if (ap
->pflags
& ATA_PFLAG_EH_IN_PROGRESS
&&
200 link
->eh_context
.unloaded_mask
& (1 << dev
->devno
) &&
201 time_after(dev
->unpark_deadline
, now
))
202 msecs
= jiffies_to_msecs(dev
->unpark_deadline
- now
);
207 spin_unlock_irq(ap
->lock
);
209 return rc
? rc
: snprintf(buf
, 20, "%u\n", msecs
);
212 static ssize_t
ata_scsi_park_store(struct device
*device
,
213 struct device_attribute
*attr
,
214 const char *buf
, size_t len
)
216 struct scsi_device
*sdev
= to_scsi_device(device
);
218 struct ata_device
*dev
;
223 rc
= kstrtol(buf
, 10, &input
);
228 if (input
> ATA_TMOUT_MAX_PARK
) {
230 input
= ATA_TMOUT_MAX_PARK
;
233 ap
= ata_shost_to_port(sdev
->host
);
235 spin_lock_irqsave(ap
->lock
, flags
);
236 dev
= ata_scsi_find_dev(ap
, sdev
);
237 if (unlikely(!dev
)) {
241 if (dev
->class != ATA_DEV_ATA
&&
242 dev
->class != ATA_DEV_ZAC
) {
248 if (dev
->flags
& ATA_DFLAG_NO_UNLOAD
) {
253 dev
->unpark_deadline
= ata_deadline(jiffies
, input
);
254 dev
->link
->eh_info
.dev_action
[dev
->devno
] |= ATA_EH_PARK
;
255 ata_port_schedule_eh(ap
);
256 complete(&ap
->park_req_pending
);
260 dev
->flags
&= ~ATA_DFLAG_NO_UNLOAD
;
263 dev
->flags
|= ATA_DFLAG_NO_UNLOAD
;
268 spin_unlock_irqrestore(ap
->lock
, flags
);
270 return rc
? rc
: len
;
272 DEVICE_ATTR(unload_heads
, S_IRUGO
| S_IWUSR
,
273 ata_scsi_park_show
, ata_scsi_park_store
);
274 EXPORT_SYMBOL_GPL(dev_attr_unload_heads
);
276 static ssize_t
ata_ncq_prio_enable_show(struct device
*device
,
277 struct device_attribute
*attr
,
280 struct scsi_device
*sdev
= to_scsi_device(device
);
282 struct ata_device
*dev
;
283 bool ncq_prio_enable
;
286 ap
= ata_shost_to_port(sdev
->host
);
288 spin_lock_irq(ap
->lock
);
289 dev
= ata_scsi_find_dev(ap
, sdev
);
295 ncq_prio_enable
= dev
->flags
& ATA_DFLAG_NCQ_PRIO_ENABLE
;
298 spin_unlock_irq(ap
->lock
);
300 return rc
? rc
: snprintf(buf
, 20, "%u\n", ncq_prio_enable
);
303 static ssize_t
ata_ncq_prio_enable_store(struct device
*device
,
304 struct device_attribute
*attr
,
305 const char *buf
, size_t len
)
307 struct scsi_device
*sdev
= to_scsi_device(device
);
309 struct ata_device
*dev
;
313 rc
= kstrtol(buf
, 10, &input
);
316 if ((input
< 0) || (input
> 1))
319 ap
= ata_shost_to_port(sdev
->host
);
320 dev
= ata_scsi_find_dev(ap
, sdev
);
324 spin_lock_irq(ap
->lock
);
326 dev
->flags
|= ATA_DFLAG_NCQ_PRIO_ENABLE
;
328 dev
->flags
&= ~ATA_DFLAG_NCQ_PRIO_ENABLE
;
330 dev
->link
->eh_info
.action
|= ATA_EH_REVALIDATE
;
331 dev
->link
->eh_info
.flags
|= ATA_EHI_QUIET
;
332 ata_port_schedule_eh(ap
);
333 spin_unlock_irq(ap
->lock
);
335 ata_port_wait_eh(ap
);
338 spin_lock_irq(ap
->lock
);
339 if (!(dev
->flags
& ATA_DFLAG_NCQ_PRIO
)) {
340 dev
->flags
&= ~ATA_DFLAG_NCQ_PRIO_ENABLE
;
343 spin_unlock_irq(ap
->lock
);
346 return rc
? rc
: len
;
349 DEVICE_ATTR(ncq_prio_enable
, S_IRUGO
| S_IWUSR
,
350 ata_ncq_prio_enable_show
, ata_ncq_prio_enable_store
);
351 EXPORT_SYMBOL_GPL(dev_attr_ncq_prio_enable
);
353 void ata_scsi_set_sense(struct ata_device
*dev
, struct scsi_cmnd
*cmd
,
354 u8 sk
, u8 asc
, u8 ascq
)
356 bool d_sense
= (dev
->flags
& ATA_DFLAG_D_SENSE
);
361 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
363 scsi_build_sense_buffer(d_sense
, cmd
->sense_buffer
, sk
, asc
, ascq
);
366 void ata_scsi_set_sense_information(struct ata_device
*dev
,
367 struct scsi_cmnd
*cmd
,
368 const struct ata_taskfile
*tf
)
375 information
= ata_tf_read_block(tf
, dev
);
376 if (information
== U64_MAX
)
379 scsi_set_sense_information(cmd
->sense_buffer
,
380 SCSI_SENSE_BUFFERSIZE
, information
);
383 static void ata_scsi_set_invalid_field(struct ata_device
*dev
,
384 struct scsi_cmnd
*cmd
, u16 field
, u8 bit
)
386 ata_scsi_set_sense(dev
, cmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
387 /* "Invalid field in CDB" */
388 scsi_set_sense_field_pointer(cmd
->sense_buffer
, SCSI_SENSE_BUFFERSIZE
,
392 static void ata_scsi_set_invalid_parameter(struct ata_device
*dev
,
393 struct scsi_cmnd
*cmd
, u16 field
)
395 /* "Invalid field in parameter list" */
396 ata_scsi_set_sense(dev
, cmd
, ILLEGAL_REQUEST
, 0x26, 0x0);
397 scsi_set_sense_field_pointer(cmd
->sense_buffer
, SCSI_SENSE_BUFFERSIZE
,
402 ata_scsi_em_message_store(struct device
*dev
, struct device_attribute
*attr
,
403 const char *buf
, size_t count
)
405 struct Scsi_Host
*shost
= class_to_shost(dev
);
406 struct ata_port
*ap
= ata_shost_to_port(shost
);
407 if (ap
->ops
->em_store
&& (ap
->flags
& ATA_FLAG_EM
))
408 return ap
->ops
->em_store(ap
, buf
, count
);
413 ata_scsi_em_message_show(struct device
*dev
, struct device_attribute
*attr
,
416 struct Scsi_Host
*shost
= class_to_shost(dev
);
417 struct ata_port
*ap
= ata_shost_to_port(shost
);
419 if (ap
->ops
->em_show
&& (ap
->flags
& ATA_FLAG_EM
))
420 return ap
->ops
->em_show(ap
, buf
);
423 DEVICE_ATTR(em_message
, S_IRUGO
| S_IWUSR
,
424 ata_scsi_em_message_show
, ata_scsi_em_message_store
);
425 EXPORT_SYMBOL_GPL(dev_attr_em_message
);
428 ata_scsi_em_message_type_show(struct device
*dev
, struct device_attribute
*attr
,
431 struct Scsi_Host
*shost
= class_to_shost(dev
);
432 struct ata_port
*ap
= ata_shost_to_port(shost
);
434 return snprintf(buf
, 23, "%d\n", ap
->em_message_type
);
436 DEVICE_ATTR(em_message_type
, S_IRUGO
,
437 ata_scsi_em_message_type_show
, NULL
);
438 EXPORT_SYMBOL_GPL(dev_attr_em_message_type
);
441 ata_scsi_activity_show(struct device
*dev
, struct device_attribute
*attr
,
444 struct scsi_device
*sdev
= to_scsi_device(dev
);
445 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
446 struct ata_device
*atadev
= ata_scsi_find_dev(ap
, sdev
);
448 if (atadev
&& ap
->ops
->sw_activity_show
&&
449 (ap
->flags
& ATA_FLAG_SW_ACTIVITY
))
450 return ap
->ops
->sw_activity_show(atadev
, buf
);
455 ata_scsi_activity_store(struct device
*dev
, struct device_attribute
*attr
,
456 const char *buf
, size_t count
)
458 struct scsi_device
*sdev
= to_scsi_device(dev
);
459 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
460 struct ata_device
*atadev
= ata_scsi_find_dev(ap
, sdev
);
461 enum sw_activity val
;
464 if (atadev
&& ap
->ops
->sw_activity_store
&&
465 (ap
->flags
& ATA_FLAG_SW_ACTIVITY
)) {
466 val
= simple_strtoul(buf
, NULL
, 0);
468 case OFF
: case BLINK_ON
: case BLINK_OFF
:
469 rc
= ap
->ops
->sw_activity_store(atadev
, val
);
478 DEVICE_ATTR(sw_activity
, S_IWUSR
| S_IRUGO
, ata_scsi_activity_show
,
479 ata_scsi_activity_store
);
480 EXPORT_SYMBOL_GPL(dev_attr_sw_activity
);
482 struct device_attribute
*ata_common_sdev_attrs
[] = {
483 &dev_attr_unload_heads
,
484 &dev_attr_ncq_prio_enable
,
487 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs
);
490 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
491 * @sdev: SCSI device for which BIOS geometry is to be determined
492 * @bdev: block device associated with @sdev
493 * @capacity: capacity of SCSI device
494 * @geom: location to which geometry will be output
496 * Generic bios head/sector/cylinder calculator
497 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
498 * mapping. Some situations may arise where the disk is not
499 * bootable if this is not used.
502 * Defined by the SCSI layer. We don't really care.
507 int ata_std_bios_param(struct scsi_device
*sdev
, struct block_device
*bdev
,
508 sector_t capacity
, int geom
[])
512 sector_div(capacity
, 255*63);
519 * ata_scsi_unlock_native_capacity - unlock native capacity
520 * @sdev: SCSI device to adjust device capacity for
522 * This function is called if a partition on @sdev extends beyond
523 * the end of the device. It requests EH to unlock HPA.
526 * Defined by the SCSI layer. Might sleep.
528 void ata_scsi_unlock_native_capacity(struct scsi_device
*sdev
)
530 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
531 struct ata_device
*dev
;
534 spin_lock_irqsave(ap
->lock
, flags
);
536 dev
= ata_scsi_find_dev(ap
, sdev
);
537 if (dev
&& dev
->n_sectors
< dev
->n_native_sectors
) {
538 dev
->flags
|= ATA_DFLAG_UNLOCK_HPA
;
539 dev
->link
->eh_info
.action
|= ATA_EH_RESET
;
540 ata_port_schedule_eh(ap
);
543 spin_unlock_irqrestore(ap
->lock
, flags
);
544 ata_port_wait_eh(ap
);
548 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
550 * @sdev: SCSI device to get identify data for
551 * @arg: User buffer area for identify data
554 * Defined by the SCSI layer. We don't really care.
557 * Zero on success, negative errno on error.
559 static int ata_get_identity(struct ata_port
*ap
, struct scsi_device
*sdev
,
562 struct ata_device
*dev
= ata_scsi_find_dev(ap
, sdev
);
563 u16 __user
*dst
= arg
;
569 if (copy_to_user(dst
, dev
->id
, ATA_ID_WORDS
* sizeof(u16
)))
572 ata_id_string(dev
->id
, buf
, ATA_ID_PROD
, ATA_ID_PROD_LEN
);
573 if (copy_to_user(dst
+ ATA_ID_PROD
, buf
, ATA_ID_PROD_LEN
))
576 ata_id_string(dev
->id
, buf
, ATA_ID_FW_REV
, ATA_ID_FW_REV_LEN
);
577 if (copy_to_user(dst
+ ATA_ID_FW_REV
, buf
, ATA_ID_FW_REV_LEN
))
580 ata_id_string(dev
->id
, buf
, ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
581 if (copy_to_user(dst
+ ATA_ID_SERNO
, buf
, ATA_ID_SERNO_LEN
))
588 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
589 * @scsidev: Device to which we are issuing command
590 * @arg: User provided data for issuing command
593 * Defined by the SCSI layer. We don't really care.
596 * Zero on success, negative errno on error.
598 int ata_cmd_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
601 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
602 u8 args
[4], *argbuf
= NULL
, *sensebuf
= NULL
;
604 enum dma_data_direction data_dir
;
605 struct scsi_sense_hdr sshdr
;
611 if (copy_from_user(args
, arg
, sizeof(args
)))
614 sensebuf
= kzalloc(SCSI_SENSE_BUFFERSIZE
, GFP_NOIO
);
618 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
621 argsize
= ATA_SECT_SIZE
* args
[3];
622 argbuf
= kmalloc(argsize
, GFP_KERNEL
);
623 if (argbuf
== NULL
) {
628 scsi_cmd
[1] = (4 << 1); /* PIO Data-in */
629 scsi_cmd
[2] = 0x0e; /* no off.line or cc, read from dev,
630 block count in sector count field */
631 data_dir
= DMA_FROM_DEVICE
;
633 scsi_cmd
[1] = (3 << 1); /* Non-data */
634 scsi_cmd
[2] = 0x20; /* cc but no off.line or data xfer */
638 scsi_cmd
[0] = ATA_16
;
640 scsi_cmd
[4] = args
[2];
641 if (args
[0] == ATA_CMD_SMART
) { /* hack -- ide driver does this too */
642 scsi_cmd
[6] = args
[3];
643 scsi_cmd
[8] = args
[1];
647 scsi_cmd
[6] = args
[1];
649 scsi_cmd
[14] = args
[0];
651 /* Good values for timeout and retries? Values below
652 from scsi_ioctl_send_command() for default case... */
653 cmd_result
= scsi_execute(scsidev
, scsi_cmd
, data_dir
, argbuf
, argsize
,
654 sensebuf
, &sshdr
, (10*HZ
), 5, 0, 0, NULL
);
656 if (driver_byte(cmd_result
) == DRIVER_SENSE
) {/* sense data available */
657 u8
*desc
= sensebuf
+ 8;
658 cmd_result
&= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
660 /* If we set cc then ATA pass-through will cause a
661 * check condition even if no error. Filter that. */
662 if (cmd_result
& SAM_STAT_CHECK_CONDITION
) {
663 if (sshdr
.sense_key
== RECOVERED_ERROR
&&
664 sshdr
.asc
== 0 && sshdr
.ascq
== 0x1d)
665 cmd_result
&= ~SAM_STAT_CHECK_CONDITION
;
668 /* Send userspace a few ATA registers (same as drivers/ide) */
669 if (sensebuf
[0] == 0x72 && /* format is "descriptor" */
670 desc
[0] == 0x09) { /* code is "ATA Descriptor" */
671 args
[0] = desc
[13]; /* status */
672 args
[1] = desc
[3]; /* error */
673 args
[2] = desc
[5]; /* sector count (0:7) */
674 if (copy_to_user(arg
, args
, sizeof(args
)))
686 && copy_to_user(arg
+ sizeof(args
), argbuf
, argsize
))
695 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
696 * @scsidev: Device to which we are issuing command
697 * @arg: User provided data for issuing command
700 * Defined by the SCSI layer. We don't really care.
703 * Zero on success, negative errno on error.
705 int ata_task_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
708 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
709 u8 args
[7], *sensebuf
= NULL
;
710 struct scsi_sense_hdr sshdr
;
716 if (copy_from_user(args
, arg
, sizeof(args
)))
719 sensebuf
= kzalloc(SCSI_SENSE_BUFFERSIZE
, GFP_NOIO
);
723 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
724 scsi_cmd
[0] = ATA_16
;
725 scsi_cmd
[1] = (3 << 1); /* Non-data */
726 scsi_cmd
[2] = 0x20; /* cc but no off.line or data xfer */
727 scsi_cmd
[4] = args
[1];
728 scsi_cmd
[6] = args
[2];
729 scsi_cmd
[8] = args
[3];
730 scsi_cmd
[10] = args
[4];
731 scsi_cmd
[12] = args
[5];
732 scsi_cmd
[13] = args
[6] & 0x4f;
733 scsi_cmd
[14] = args
[0];
735 /* Good values for timeout and retries? Values below
736 from scsi_ioctl_send_command() for default case... */
737 cmd_result
= scsi_execute(scsidev
, scsi_cmd
, DMA_NONE
, NULL
, 0,
738 sensebuf
, &sshdr
, (10*HZ
), 5, 0, 0, NULL
);
740 if (driver_byte(cmd_result
) == DRIVER_SENSE
) {/* sense data available */
741 u8
*desc
= sensebuf
+ 8;
742 cmd_result
&= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
744 /* If we set cc then ATA pass-through will cause a
745 * check condition even if no error. Filter that. */
746 if (cmd_result
& SAM_STAT_CHECK_CONDITION
) {
747 if (sshdr
.sense_key
== RECOVERED_ERROR
&&
748 sshdr
.asc
== 0 && sshdr
.ascq
== 0x1d)
749 cmd_result
&= ~SAM_STAT_CHECK_CONDITION
;
752 /* Send userspace ATA registers */
753 if (sensebuf
[0] == 0x72 && /* format is "descriptor" */
754 desc
[0] == 0x09) {/* code is "ATA Descriptor" */
755 args
[0] = desc
[13]; /* status */
756 args
[1] = desc
[3]; /* error */
757 args
[2] = desc
[5]; /* sector count (0:7) */
758 args
[3] = desc
[7]; /* lbal */
759 args
[4] = desc
[9]; /* lbam */
760 args
[5] = desc
[11]; /* lbah */
761 args
[6] = desc
[12]; /* select */
762 if (copy_to_user(arg
, args
, sizeof(args
)))
777 static int ata_ioc32(struct ata_port
*ap
)
779 if (ap
->flags
& ATA_FLAG_PIO_DMA
)
781 if (ap
->pflags
& ATA_PFLAG_PIO32
)
786 int ata_sas_scsi_ioctl(struct ata_port
*ap
, struct scsi_device
*scsidev
,
787 int cmd
, void __user
*arg
)
795 spin_lock_irqsave(ap
->lock
, flags
);
797 spin_unlock_irqrestore(ap
->lock
, flags
);
798 return put_user(val
, (unsigned long __user
*)arg
);
801 val
= (unsigned long) arg
;
803 spin_lock_irqsave(ap
->lock
, flags
);
804 if (ap
->pflags
& ATA_PFLAG_PIO32CHANGE
) {
806 ap
->pflags
|= ATA_PFLAG_PIO32
;
808 ap
->pflags
&= ~ATA_PFLAG_PIO32
;
810 if (val
!= ata_ioc32(ap
))
813 spin_unlock_irqrestore(ap
->lock
, flags
);
816 case HDIO_GET_IDENTITY
:
817 return ata_get_identity(ap
, scsidev
, arg
);
820 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
822 return ata_cmd_ioctl(scsidev
, arg
);
824 case HDIO_DRIVE_TASK
:
825 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
827 return ata_task_ioctl(scsidev
, arg
);
836 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl
);
838 int ata_scsi_ioctl(struct scsi_device
*scsidev
, int cmd
, void __user
*arg
)
840 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev
->host
),
843 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
846 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
847 * @dev: ATA device to which the new command is attached
848 * @cmd: SCSI command that originated this ATA command
850 * Obtain a reference to an unused ata_queued_cmd structure,
851 * which is the basic libata structure representing a single
852 * ATA command sent to the hardware.
854 * If a command was available, fill in the SCSI-specific
855 * portions of the structure with information on the
859 * spin_lock_irqsave(host lock)
862 * Command allocated, or %NULL if none available.
864 static struct ata_queued_cmd
*ata_scsi_qc_new(struct ata_device
*dev
,
865 struct scsi_cmnd
*cmd
)
867 struct ata_queued_cmd
*qc
;
869 qc
= ata_qc_new_init(dev
, cmd
->request
->tag
);
872 qc
->scsidone
= cmd
->scsi_done
;
874 qc
->sg
= scsi_sglist(cmd
);
875 qc
->n_elem
= scsi_sg_count(cmd
);
877 cmd
->result
= (DID_OK
<< 16) | (QUEUE_FULL
<< 1);
884 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd
*qc
)
886 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
888 qc
->extrabytes
= scmd
->request
->extra_len
;
889 qc
->nbytes
= scsi_bufflen(scmd
) + qc
->extrabytes
;
893 * ata_dump_status - user friendly display of error info
894 * @id: id of the port in question
895 * @tf: ptr to filled out taskfile
897 * Decode and dump the ATA error/status registers for the user so
898 * that they have some idea what really happened at the non
899 * make-believe layer.
902 * inherited from caller
904 static void ata_dump_status(unsigned id
, struct ata_taskfile
*tf
)
906 u8 stat
= tf
->command
, err
= tf
->feature
;
908 pr_warn("ata%u: status=0x%02x { ", id
, stat
);
909 if (stat
& ATA_BUSY
) {
910 pr_cont("Busy }\n"); /* Data is not valid in this case */
912 if (stat
& ATA_DRDY
) pr_cont("DriveReady ");
913 if (stat
& ATA_DF
) pr_cont("DeviceFault ");
914 if (stat
& ATA_DSC
) pr_cont("SeekComplete ");
915 if (stat
& ATA_DRQ
) pr_cont("DataRequest ");
916 if (stat
& ATA_CORR
) pr_cont("CorrectedError ");
917 if (stat
& ATA_SENSE
) pr_cont("Sense ");
918 if (stat
& ATA_ERR
) pr_cont("Error ");
922 pr_warn("ata%u: error=0x%02x { ", id
, err
);
923 if (err
& ATA_ABORTED
) pr_cont("DriveStatusError ");
924 if (err
& ATA_ICRC
) {
925 if (err
& ATA_ABORTED
)
927 else pr_cont("Sector ");
929 if (err
& ATA_UNC
) pr_cont("UncorrectableError ");
930 if (err
& ATA_IDNF
) pr_cont("SectorIdNotFound ");
931 if (err
& ATA_TRK0NF
) pr_cont("TrackZeroNotFound ");
932 if (err
& ATA_AMNF
) pr_cont("AddrMarkNotFound ");
939 * ata_to_sense_error - convert ATA error to SCSI error
940 * @id: ATA device number
941 * @drv_stat: value contained in ATA status register
942 * @drv_err: value contained in ATA error register
943 * @sk: the sense key we'll fill out
944 * @asc: the additional sense code we'll fill out
945 * @ascq: the additional sense code qualifier we'll fill out
946 * @verbose: be verbose
948 * Converts an ATA error into a SCSI error. Fill out pointers to
949 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
950 * format sense blocks.
953 * spin_lock_irqsave(host lock)
955 static void ata_to_sense_error(unsigned id
, u8 drv_stat
, u8 drv_err
, u8
*sk
,
956 u8
*asc
, u8
*ascq
, int verbose
)
960 /* Based on the 3ware driver translation table */
961 static const unsigned char sense_table
[][4] = {
963 {0xd1, ABORTED_COMMAND
, 0x00, 0x00},
964 // Device busy Aborted command
966 {0xd0, ABORTED_COMMAND
, 0x00, 0x00},
967 // Device busy Aborted command
969 {0x61, HARDWARE_ERROR
, 0x00, 0x00},
970 // Device fault Hardware error
971 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
972 {0x84, ABORTED_COMMAND
, 0x47, 0x00},
973 // Data CRC error SCSI parity error
974 /* MC|ID|ABRT|TRK0|MARK */
975 {0x37, NOT_READY
, 0x04, 0x00},
976 // Unit offline Not ready
978 {0x09, NOT_READY
, 0x04, 0x00},
979 // Unrecovered disk error Not ready
980 /* Bad address mark */
981 {0x01, MEDIUM_ERROR
, 0x13, 0x00},
982 // Address mark not found for data field
983 /* TRK0 - Track 0 not found */
984 {0x02, HARDWARE_ERROR
, 0x00, 0x00},
986 /* Abort: 0x04 is not translated here, see below */
987 /* Media change request */
988 {0x08, NOT_READY
, 0x04, 0x00},
989 // FIXME: faking offline
990 /* SRV/IDNF - ID not found */
991 {0x10, ILLEGAL_REQUEST
, 0x21, 0x00},
992 // Logical address out of range
993 /* MC - Media Changed */
994 {0x20, UNIT_ATTENTION
, 0x28, 0x00},
995 // Not ready to ready change, medium may have changed
996 /* ECC - Uncorrectable ECC error */
997 {0x40, MEDIUM_ERROR
, 0x11, 0x04},
998 // Unrecovered read error
999 /* BBD - block marked bad */
1000 {0x80, MEDIUM_ERROR
, 0x11, 0x04},
1001 // Block marked bad Medium error, unrecovered read error
1002 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
1004 static const unsigned char stat_table
[][4] = {
1005 /* Must be first because BUSY means no other bits valid */
1006 {0x80, ABORTED_COMMAND
, 0x47, 0x00},
1007 // Busy, fake parity for now
1008 {0x40, ILLEGAL_REQUEST
, 0x21, 0x04},
1009 // Device ready, unaligned write command
1010 {0x20, HARDWARE_ERROR
, 0x44, 0x00},
1011 // Device fault, internal target failure
1012 {0x08, ABORTED_COMMAND
, 0x47, 0x00},
1013 // Timed out in xfer, fake parity for now
1014 {0x04, RECOVERED_ERROR
, 0x11, 0x00},
1015 // Recovered ECC error Medium error, recovered
1016 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
1020 * Is this an error we can process/parse
1022 if (drv_stat
& ATA_BUSY
) {
1023 drv_err
= 0; /* Ignore the err bits, they're invalid */
1027 /* Look for drv_err */
1028 for (i
= 0; sense_table
[i
][0] != 0xFF; i
++) {
1029 /* Look for best matches first */
1030 if ((sense_table
[i
][0] & drv_err
) ==
1031 sense_table
[i
][0]) {
1032 *sk
= sense_table
[i
][1];
1033 *asc
= sense_table
[i
][2];
1034 *ascq
= sense_table
[i
][3];
1035 goto translate_done
;
1041 * Fall back to interpreting status bits. Note that if the drv_err
1042 * has only the ABRT bit set, we decode drv_stat. ABRT by itself
1043 * is not descriptive enough.
1045 for (i
= 0; stat_table
[i
][0] != 0xFF; i
++) {
1046 if (stat_table
[i
][0] & drv_stat
) {
1047 *sk
= stat_table
[i
][1];
1048 *asc
= stat_table
[i
][2];
1049 *ascq
= stat_table
[i
][3];
1050 goto translate_done
;
1055 * We need a sensible error return here, which is tricky, and one
1056 * that won't cause people to do things like return a disk wrongly.
1058 *sk
= ABORTED_COMMAND
;
1064 pr_err("ata%u: translated ATA stat/err 0x%02x/%02x to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
1065 id
, drv_stat
, drv_err
, *sk
, *asc
, *ascq
);
1070 * ata_gen_passthru_sense - Generate check condition sense block.
1071 * @qc: Command that completed.
1073 * This function is specific to the ATA descriptor format sense
1074 * block specified for the ATA pass through commands. Regardless
1075 * of whether the command errored or not, return a sense
1076 * block. Copy all controller registers into the sense
1077 * block. If there was no error, we get the request from an ATA
1078 * passthrough command, so we use the following sense data:
1079 * sk = RECOVERED ERROR
1080 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1086 static void ata_gen_passthru_sense(struct ata_queued_cmd
*qc
)
1088 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1089 struct ata_taskfile
*tf
= &qc
->result_tf
;
1090 unsigned char *sb
= cmd
->sense_buffer
;
1091 unsigned char *desc
= sb
+ 8;
1092 int verbose
= qc
->ap
->ops
->error_handler
== NULL
;
1093 u8 sense_key
, asc
, ascq
;
1095 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
1097 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
1100 * Use ata_to_sense_error() to map status register bits
1101 * onto sense key, asc & ascq.
1104 tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
1105 ata_to_sense_error(qc
->ap
->print_id
, tf
->command
, tf
->feature
,
1106 &sense_key
, &asc
, &ascq
, verbose
);
1107 ata_scsi_set_sense(qc
->dev
, cmd
, sense_key
, asc
, ascq
);
1110 * ATA PASS-THROUGH INFORMATION AVAILABLE
1111 * Always in descriptor format sense.
1113 scsi_build_sense_buffer(1, cmd
->sense_buffer
,
1114 RECOVERED_ERROR
, 0, 0x1D);
1117 if ((cmd
->sense_buffer
[0] & 0x7f) >= 0x72) {
1120 /* descriptor format */
1122 desc
= (char *)scsi_sense_desc_find(sb
, len
+ 8, 9);
1124 if (SCSI_SENSE_BUFFERSIZE
< len
+ 14)
1127 desc
= sb
+ 8 + len
;
1132 * Copy registers into sense buffer.
1135 desc
[3] = tf
->feature
; /* == error reg */
1136 desc
[5] = tf
->nsect
;
1139 desc
[11] = tf
->lbah
;
1140 desc
[12] = tf
->device
;
1141 desc
[13] = tf
->command
; /* == status reg */
1144 * Fill in Extend bit, and the high order bytes
1147 if (tf
->flags
& ATA_TFLAG_LBA48
) {
1149 desc
[4] = tf
->hob_nsect
;
1150 desc
[6] = tf
->hob_lbal
;
1151 desc
[8] = tf
->hob_lbam
;
1152 desc
[10] = tf
->hob_lbah
;
1155 /* Fixed sense format */
1156 desc
[0] = tf
->feature
;
1157 desc
[1] = tf
->command
; /* status */
1158 desc
[2] = tf
->device
;
1159 desc
[3] = tf
->nsect
;
1161 if (tf
->flags
& ATA_TFLAG_LBA48
) {
1165 if (tf
->hob_lbal
|| tf
->hob_lbam
|| tf
->hob_lbah
)
1169 desc
[10] = tf
->lbam
;
1170 desc
[11] = tf
->lbah
;
1175 * ata_gen_ata_sense - generate a SCSI fixed sense block
1176 * @qc: Command that we are erroring out
1178 * Generate sense block for a failed ATA command @qc. Descriptor
1179 * format is used to accommodate LBA48 block address.
1184 static void ata_gen_ata_sense(struct ata_queued_cmd
*qc
)
1186 struct ata_device
*dev
= qc
->dev
;
1187 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1188 struct ata_taskfile
*tf
= &qc
->result_tf
;
1189 unsigned char *sb
= cmd
->sense_buffer
;
1190 int verbose
= qc
->ap
->ops
->error_handler
== NULL
;
1192 u8 sense_key
, asc
, ascq
;
1194 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
1196 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
1198 if (ata_dev_disabled(dev
)) {
1199 /* Device disabled after error recovery */
1200 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */
1201 ata_scsi_set_sense(dev
, cmd
, NOT_READY
, 0x04, 0x21);
1204 /* Use ata_to_sense_error() to map status register bits
1205 * onto sense key, asc & ascq.
1208 tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
1209 ata_to_sense_error(qc
->ap
->print_id
, tf
->command
, tf
->feature
,
1210 &sense_key
, &asc
, &ascq
, verbose
);
1211 ata_scsi_set_sense(dev
, cmd
, sense_key
, asc
, ascq
);
1213 /* Could not decode error */
1214 ata_dev_warn(dev
, "could not decode error status 0x%x err_mask 0x%x\n",
1215 tf
->command
, qc
->err_mask
);
1216 ata_scsi_set_sense(dev
, cmd
, ABORTED_COMMAND
, 0, 0);
1220 block
= ata_tf_read_block(&qc
->result_tf
, dev
);
1221 if (block
== U64_MAX
)
1224 scsi_set_sense_information(sb
, SCSI_SENSE_BUFFERSIZE
, block
);
1227 static void ata_scsi_sdev_config(struct scsi_device
*sdev
)
1229 sdev
->use_10_for_rw
= 1;
1230 sdev
->use_10_for_ms
= 1;
1231 sdev
->no_write_same
= 1;
1233 /* Schedule policy is determined by ->qc_defer() callback and
1234 * it needs to see every deferred qc. Set dev_blocked to 1 to
1235 * prevent SCSI midlayer from automatically deferring
1238 sdev
->max_device_blocked
= 1;
1242 * atapi_drain_needed - Check whether data transfer may overflow
1243 * @rq: request to be checked
1245 * ATAPI commands which transfer variable length data to host
1246 * might overflow due to application error or hardware bug. This
1247 * function checks whether overflow should be drained and ignored
1254 * 1 if ; otherwise, 0.
1256 static int atapi_drain_needed(struct request
*rq
)
1258 if (likely(!blk_rq_is_passthrough(rq
)))
1261 if (!blk_rq_bytes(rq
) || op_is_write(req_op(rq
)))
1264 return atapi_cmd_type(scsi_req(rq
)->cmd
[0]) == ATAPI_MISC
;
1267 static int ata_scsi_dev_config(struct scsi_device
*sdev
,
1268 struct ata_device
*dev
)
1270 struct request_queue
*q
= sdev
->request_queue
;
1272 if (!ata_id_has_unload(dev
->id
))
1273 dev
->flags
|= ATA_DFLAG_NO_UNLOAD
;
1275 /* configure max sectors */
1276 blk_queue_max_hw_sectors(q
, dev
->max_sectors
);
1278 if (dev
->class == ATA_DEV_ATAPI
) {
1281 sdev
->sector_size
= ATA_SECT_SIZE
;
1283 /* set DMA padding */
1284 blk_queue_update_dma_pad(q
, ATA_DMA_PAD_SZ
- 1);
1286 /* configure draining */
1287 buf
= kmalloc(ATAPI_MAX_DRAIN
, q
->bounce_gfp
| GFP_KERNEL
);
1289 ata_dev_err(dev
, "drain buffer allocation failed\n");
1293 blk_queue_dma_drain(q
, atapi_drain_needed
, buf
, ATAPI_MAX_DRAIN
);
1295 sdev
->sector_size
= ata_id_logical_sector_size(dev
->id
);
1296 sdev
->manage_start_stop
= 1;
1300 * ata_pio_sectors() expects buffer for each sector to not cross
1301 * page boundary. Enforce it by requiring buffers to be sector
1302 * aligned, which works iff sector_size is not larger than
1303 * PAGE_SIZE. ATAPI devices also need the alignment as
1304 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1306 if (sdev
->sector_size
> PAGE_SIZE
)
1308 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1311 blk_queue_update_dma_alignment(q
, sdev
->sector_size
- 1);
1313 if (dev
->flags
& ATA_DFLAG_AN
)
1314 set_bit(SDEV_EVT_MEDIA_CHANGE
, sdev
->supported_events
);
1316 if (dev
->flags
& ATA_DFLAG_NCQ
) {
1319 depth
= min(sdev
->host
->can_queue
, ata_id_queue_depth(dev
->id
));
1320 depth
= min(ATA_MAX_QUEUE
- 1, depth
);
1321 scsi_change_queue_depth(sdev
, depth
);
1324 blk_queue_flush_queueable(q
, false);
1326 if (dev
->flags
& ATA_DFLAG_TRUSTED
)
1327 sdev
->security_supported
= 1;
1334 * ata_scsi_slave_config - Set SCSI device attributes
1335 * @sdev: SCSI device to examine
1337 * This is called before we actually start reading
1338 * and writing to the device, to configure certain
1339 * SCSI mid-layer behaviors.
1342 * Defined by SCSI layer. We don't really care.
1345 int ata_scsi_slave_config(struct scsi_device
*sdev
)
1347 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1348 struct ata_device
*dev
= __ata_scsi_find_dev(ap
, sdev
);
1351 ata_scsi_sdev_config(sdev
);
1354 rc
= ata_scsi_dev_config(sdev
, dev
);
1360 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1361 * @sdev: SCSI device to be destroyed
1363 * @sdev is about to be destroyed for hot/warm unplugging. If
1364 * this unplugging was initiated by libata as indicated by NULL
1365 * dev->sdev, this function doesn't have to do anything.
1366 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1367 * Clear dev->sdev, schedule the device for ATA detach and invoke
1371 * Defined by SCSI layer. We don't really care.
1373 void ata_scsi_slave_destroy(struct scsi_device
*sdev
)
1375 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1376 struct request_queue
*q
= sdev
->request_queue
;
1377 unsigned long flags
;
1378 struct ata_device
*dev
;
1380 if (!ap
->ops
->error_handler
)
1383 spin_lock_irqsave(ap
->lock
, flags
);
1384 dev
= __ata_scsi_find_dev(ap
, sdev
);
1385 if (dev
&& dev
->sdev
) {
1386 /* SCSI device already in CANCEL state, no need to offline it */
1388 dev
->flags
|= ATA_DFLAG_DETACH
;
1389 ata_port_schedule_eh(ap
);
1391 spin_unlock_irqrestore(ap
->lock
, flags
);
1393 kfree(q
->dma_drain_buffer
);
1394 q
->dma_drain_buffer
= NULL
;
1395 q
->dma_drain_size
= 0;
1399 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth
1400 * @ap: ATA port to which the device change the queue depth
1401 * @sdev: SCSI device to configure queue depth for
1402 * @queue_depth: new queue depth
1404 * libsas and libata have different approaches for associating a sdev to
1408 int __ata_change_queue_depth(struct ata_port
*ap
, struct scsi_device
*sdev
,
1411 struct ata_device
*dev
;
1412 unsigned long flags
;
1414 if (queue_depth
< 1 || queue_depth
== sdev
->queue_depth
)
1415 return sdev
->queue_depth
;
1417 dev
= ata_scsi_find_dev(ap
, sdev
);
1418 if (!dev
|| !ata_dev_enabled(dev
))
1419 return sdev
->queue_depth
;
1422 spin_lock_irqsave(ap
->lock
, flags
);
1423 dev
->flags
&= ~ATA_DFLAG_NCQ_OFF
;
1424 if (queue_depth
== 1 || !ata_ncq_enabled(dev
)) {
1425 dev
->flags
|= ATA_DFLAG_NCQ_OFF
;
1428 spin_unlock_irqrestore(ap
->lock
, flags
);
1430 /* limit and apply queue depth */
1431 queue_depth
= min(queue_depth
, sdev
->host
->can_queue
);
1432 queue_depth
= min(queue_depth
, ata_id_queue_depth(dev
->id
));
1433 queue_depth
= min(queue_depth
, ATA_MAX_QUEUE
- 1);
1435 if (sdev
->queue_depth
== queue_depth
)
1438 return scsi_change_queue_depth(sdev
, queue_depth
);
1442 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1443 * @sdev: SCSI device to configure queue depth for
1444 * @queue_depth: new queue depth
1446 * This is libata standard hostt->change_queue_depth callback.
1447 * SCSI will call into this callback when user tries to set queue
1451 * SCSI layer (we don't care)
1454 * Newly configured queue depth.
1456 int ata_scsi_change_queue_depth(struct scsi_device
*sdev
, int queue_depth
)
1458 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1460 return __ata_change_queue_depth(ap
, sdev
, queue_depth
);
1464 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1465 * @qc: Storage for translated ATA taskfile
1467 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1468 * (to start). Perhaps these commands should be preceded by
1469 * CHECK POWER MODE to see what power mode the device is already in.
1470 * [See SAT revision 5 at www.t10.org]
1473 * spin_lock_irqsave(host lock)
1476 * Zero on success, non-zero on error.
1478 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd
*qc
)
1480 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1481 struct ata_taskfile
*tf
= &qc
->tf
;
1482 const u8
*cdb
= scmd
->cmnd
;
1486 if (scmd
->cmd_len
< 5) {
1491 tf
->flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1492 tf
->protocol
= ATA_PROT_NODATA
;
1494 ; /* ignore IMMED bit, violates sat-r05 */
1499 goto invalid_fld
; /* LOEJ bit set not supported */
1501 if (((cdb
[4] >> 4) & 0xf) != 0) {
1504 goto invalid_fld
; /* power conditions not supported */
1508 tf
->nsect
= 1; /* 1 sector, lba=0 */
1510 if (qc
->dev
->flags
& ATA_DFLAG_LBA
) {
1511 tf
->flags
|= ATA_TFLAG_LBA
;
1516 tf
->device
|= ATA_LBA
;
1519 tf
->lbal
= 0x1; /* sect */
1520 tf
->lbam
= 0x0; /* cyl low */
1521 tf
->lbah
= 0x0; /* cyl high */
1524 tf
->command
= ATA_CMD_VERIFY
; /* READ VERIFY */
1526 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1527 * or S5) causing some drives to spin up and down again.
1529 if ((qc
->ap
->flags
& ATA_FLAG_NO_POWEROFF_SPINDOWN
) &&
1530 system_state
== SYSTEM_POWER_OFF
)
1533 if ((qc
->ap
->flags
& ATA_FLAG_NO_HIBERNATE_SPINDOWN
) &&
1534 system_entering_hibernation())
1537 /* Issue ATA STANDBY IMMEDIATE command */
1538 tf
->command
= ATA_CMD_STANDBYNOW1
;
1542 * Standby and Idle condition timers could be implemented but that
1543 * would require libata to implement the Power condition mode page
1544 * and allow the user to change it. Changing mode pages requires
1545 * MODE SELECT to be implemented.
1551 ata_scsi_set_invalid_field(qc
->dev
, scmd
, fp
, bp
);
1554 scmd
->result
= SAM_STAT_GOOD
;
1560 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1561 * @qc: Storage for translated ATA taskfile
1563 * Sets up an ATA taskfile to issue FLUSH CACHE or
1567 * spin_lock_irqsave(host lock)
1570 * Zero on success, non-zero on error.
1572 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd
*qc
)
1574 struct ata_taskfile
*tf
= &qc
->tf
;
1576 tf
->flags
|= ATA_TFLAG_DEVICE
;
1577 tf
->protocol
= ATA_PROT_NODATA
;
1579 if (qc
->dev
->flags
& ATA_DFLAG_FLUSH_EXT
)
1580 tf
->command
= ATA_CMD_FLUSH_EXT
;
1582 tf
->command
= ATA_CMD_FLUSH
;
1584 /* flush is critical for IO integrity, consider it an IO command */
1585 qc
->flags
|= ATA_QCFLAG_IO
;
1591 * scsi_6_lba_len - Get LBA and transfer length
1592 * @cdb: SCSI command to translate
1594 * Calculate LBA and transfer length for 6-byte commands.
1598 * @plen: the transfer length
1600 static void scsi_6_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1605 VPRINTK("six-byte command\n");
1607 lba
|= ((u64
)(cdb
[1] & 0x1f)) << 16;
1608 lba
|= ((u64
)cdb
[2]) << 8;
1609 lba
|= ((u64
)cdb
[3]);
1618 * scsi_10_lba_len - Get LBA and transfer length
1619 * @cdb: SCSI command to translate
1621 * Calculate LBA and transfer length for 10-byte commands.
1625 * @plen: the transfer length
1627 static void scsi_10_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1632 VPRINTK("ten-byte command\n");
1634 lba
|= ((u64
)cdb
[2]) << 24;
1635 lba
|= ((u64
)cdb
[3]) << 16;
1636 lba
|= ((u64
)cdb
[4]) << 8;
1637 lba
|= ((u64
)cdb
[5]);
1639 len
|= ((u32
)cdb
[7]) << 8;
1640 len
|= ((u32
)cdb
[8]);
1647 * scsi_16_lba_len - Get LBA and transfer length
1648 * @cdb: SCSI command to translate
1650 * Calculate LBA and transfer length for 16-byte commands.
1654 * @plen: the transfer length
1656 static void scsi_16_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1661 VPRINTK("sixteen-byte command\n");
1663 lba
|= ((u64
)cdb
[2]) << 56;
1664 lba
|= ((u64
)cdb
[3]) << 48;
1665 lba
|= ((u64
)cdb
[4]) << 40;
1666 lba
|= ((u64
)cdb
[5]) << 32;
1667 lba
|= ((u64
)cdb
[6]) << 24;
1668 lba
|= ((u64
)cdb
[7]) << 16;
1669 lba
|= ((u64
)cdb
[8]) << 8;
1670 lba
|= ((u64
)cdb
[9]);
1672 len
|= ((u32
)cdb
[10]) << 24;
1673 len
|= ((u32
)cdb
[11]) << 16;
1674 len
|= ((u32
)cdb
[12]) << 8;
1675 len
|= ((u32
)cdb
[13]);
1682 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1683 * @qc: Storage for translated ATA taskfile
1685 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1688 * spin_lock_irqsave(host lock)
1691 * Zero on success, non-zero on error.
1693 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd
*qc
)
1695 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1696 struct ata_taskfile
*tf
= &qc
->tf
;
1697 struct ata_device
*dev
= qc
->dev
;
1698 u64 dev_sectors
= qc
->dev
->n_sectors
;
1699 const u8
*cdb
= scmd
->cmnd
;
1704 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1705 tf
->protocol
= ATA_PROT_NODATA
;
1707 if (cdb
[0] == VERIFY
) {
1708 if (scmd
->cmd_len
< 10) {
1712 scsi_10_lba_len(cdb
, &block
, &n_block
);
1713 } else if (cdb
[0] == VERIFY_16
) {
1714 if (scmd
->cmd_len
< 16) {
1718 scsi_16_lba_len(cdb
, &block
, &n_block
);
1726 if (block
>= dev_sectors
)
1728 if ((block
+ n_block
) > dev_sectors
)
1731 if (dev
->flags
& ATA_DFLAG_LBA
) {
1732 tf
->flags
|= ATA_TFLAG_LBA
;
1734 if (lba_28_ok(block
, n_block
)) {
1736 tf
->command
= ATA_CMD_VERIFY
;
1737 tf
->device
|= (block
>> 24) & 0xf;
1738 } else if (lba_48_ok(block
, n_block
)) {
1739 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
1743 tf
->flags
|= ATA_TFLAG_LBA48
;
1744 tf
->command
= ATA_CMD_VERIFY_EXT
;
1746 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
1748 tf
->hob_lbah
= (block
>> 40) & 0xff;
1749 tf
->hob_lbam
= (block
>> 32) & 0xff;
1750 tf
->hob_lbal
= (block
>> 24) & 0xff;
1752 /* request too large even for LBA48 */
1755 tf
->nsect
= n_block
& 0xff;
1757 tf
->lbah
= (block
>> 16) & 0xff;
1758 tf
->lbam
= (block
>> 8) & 0xff;
1759 tf
->lbal
= block
& 0xff;
1761 tf
->device
|= ATA_LBA
;
1764 u32 sect
, head
, cyl
, track
;
1766 if (!lba_28_ok(block
, n_block
))
1769 /* Convert LBA to CHS */
1770 track
= (u32
)block
/ dev
->sectors
;
1771 cyl
= track
/ dev
->heads
;
1772 head
= track
% dev
->heads
;
1773 sect
= (u32
)block
% dev
->sectors
+ 1;
1775 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1776 (u32
)block
, track
, cyl
, head
, sect
);
1778 /* Check whether the converted CHS can fit.
1782 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
1785 tf
->command
= ATA_CMD_VERIFY
;
1786 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
1789 tf
->lbah
= cyl
>> 8;
1796 ata_scsi_set_invalid_field(qc
->dev
, scmd
, fp
, 0xff);
1800 ata_scsi_set_sense(qc
->dev
, scmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1801 /* "Logical Block Address out of range" */
1805 scmd
->result
= SAM_STAT_GOOD
;
1809 static bool ata_check_nblocks(struct scsi_cmnd
*scmd
, u32 n_blocks
)
1811 struct request
*rq
= scmd
->request
;
1814 if (!blk_rq_is_passthrough(rq
))
1817 req_blocks
= blk_rq_bytes(rq
) / scmd
->device
->sector_size
;
1818 if (n_blocks
> req_blocks
)
1825 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1826 * @qc: Storage for translated ATA taskfile
1828 * Converts any of six SCSI read/write commands into the
1829 * ATA counterpart, including starting sector (LBA),
1830 * sector count, and taking into account the device's LBA48
1833 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1834 * %WRITE_16 are currently supported.
1837 * spin_lock_irqsave(host lock)
1840 * Zero on success, non-zero on error.
1842 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd
*qc
)
1844 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1845 const u8
*cdb
= scmd
->cmnd
;
1846 struct request
*rq
= scmd
->request
;
1847 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq
));
1848 unsigned int tf_flags
= 0;
1854 if (cdb
[0] == WRITE_10
|| cdb
[0] == WRITE_6
|| cdb
[0] == WRITE_16
)
1855 tf_flags
|= ATA_TFLAG_WRITE
;
1857 /* Calculate the SCSI LBA, transfer length and FUA. */
1861 if (unlikely(scmd
->cmd_len
< 10)) {
1865 scsi_10_lba_len(cdb
, &block
, &n_block
);
1866 if (cdb
[1] & (1 << 3))
1867 tf_flags
|= ATA_TFLAG_FUA
;
1868 if (!ata_check_nblocks(scmd
, n_block
))
1873 if (unlikely(scmd
->cmd_len
< 6)) {
1877 scsi_6_lba_len(cdb
, &block
, &n_block
);
1879 /* for 6-byte r/w commands, transfer length 0
1880 * means 256 blocks of data, not 0 block.
1884 if (!ata_check_nblocks(scmd
, n_block
))
1889 if (unlikely(scmd
->cmd_len
< 16)) {
1893 scsi_16_lba_len(cdb
, &block
, &n_block
);
1894 if (cdb
[1] & (1 << 3))
1895 tf_flags
|= ATA_TFLAG_FUA
;
1896 if (!ata_check_nblocks(scmd
, n_block
))
1900 DPRINTK("no-byte command\n");
1905 /* Check and compose ATA command */
1907 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1908 * length 0 means transfer 0 block of data.
1909 * However, for ATA R/W commands, sector count 0 means
1910 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1912 * WARNING: one or two older ATA drives treat 0 as 0...
1916 qc
->flags
|= ATA_QCFLAG_IO
;
1917 qc
->nbytes
= n_block
* scmd
->device
->sector_size
;
1919 rc
= ata_build_rw_tf(&qc
->tf
, qc
->dev
, block
, n_block
, tf_flags
,
1922 if (likely(rc
== 0))
1927 /* treat all other errors as -EINVAL, fall through */
1929 ata_scsi_set_invalid_field(qc
->dev
, scmd
, fp
, 0xff);
1933 ata_scsi_set_sense(qc
->dev
, scmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1934 /* "Logical Block Address out of range" */
1938 scmd
->result
= SAM_STAT_GOOD
;
1942 static void ata_qc_done(struct ata_queued_cmd
*qc
)
1944 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1945 void (*done
)(struct scsi_cmnd
*) = qc
->scsidone
;
1951 static void ata_scsi_qc_complete(struct ata_queued_cmd
*qc
)
1953 struct ata_port
*ap
= qc
->ap
;
1954 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1955 u8
*cdb
= cmd
->cmnd
;
1956 int need_sense
= (qc
->err_mask
!= 0);
1958 /* For ATA pass thru (SAT) commands, generate a sense block if
1959 * user mandated it or if there's an error. Note that if we
1960 * generate because the user forced us to [CK_COND =1], a check
1961 * condition is generated and the ATA register values are returned
1962 * whether the command completed successfully or not. If there
1963 * was no error, we use the following sense data:
1964 * sk = RECOVERED ERROR
1965 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1967 if (((cdb
[0] == ATA_16
) || (cdb
[0] == ATA_12
)) &&
1968 ((cdb
[2] & 0x20) || need_sense
))
1969 ata_gen_passthru_sense(qc
);
1970 else if (qc
->flags
& ATA_QCFLAG_SENSE_VALID
)
1971 cmd
->result
= SAM_STAT_CHECK_CONDITION
;
1972 else if (need_sense
)
1973 ata_gen_ata_sense(qc
);
1975 cmd
->result
= SAM_STAT_GOOD
;
1977 if (need_sense
&& !ap
->ops
->error_handler
)
1978 ata_dump_status(ap
->print_id
, &qc
->result_tf
);
1984 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1985 * @dev: ATA device to which the command is addressed
1986 * @cmd: SCSI command to execute
1987 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1989 * Our ->queuecommand() function has decided that the SCSI
1990 * command issued can be directly translated into an ATA
1991 * command, rather than handled internally.
1993 * This function sets up an ata_queued_cmd structure for the
1994 * SCSI command, and sends that ata_queued_cmd to the hardware.
1996 * The xlat_func argument (actor) returns 0 if ready to execute
1997 * ATA command, else 1 to finish translation. If 1 is returned
1998 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1999 * to be set reflecting an error condition or clean (early)
2003 * spin_lock_irqsave(host lock)
2006 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
2007 * needs to be deferred.
2009 static int ata_scsi_translate(struct ata_device
*dev
, struct scsi_cmnd
*cmd
,
2010 ata_xlat_func_t xlat_func
)
2012 struct ata_port
*ap
= dev
->link
->ap
;
2013 struct ata_queued_cmd
*qc
;
2018 qc
= ata_scsi_qc_new(dev
, cmd
);
2022 /* data is present; dma-map it */
2023 if (cmd
->sc_data_direction
== DMA_FROM_DEVICE
||
2024 cmd
->sc_data_direction
== DMA_TO_DEVICE
) {
2025 if (unlikely(scsi_bufflen(cmd
) < 1)) {
2026 ata_dev_warn(dev
, "WARNING: zero len r/w req\n");
2030 ata_sg_init(qc
, scsi_sglist(cmd
), scsi_sg_count(cmd
));
2032 qc
->dma_dir
= cmd
->sc_data_direction
;
2035 qc
->complete_fn
= ata_scsi_qc_complete
;
2040 if (ap
->ops
->qc_defer
) {
2041 if ((rc
= ap
->ops
->qc_defer(qc
)))
2045 /* select device, send command to hardware */
2053 cmd
->scsi_done(cmd
);
2054 DPRINTK("EXIT - early finish (good or error)\n");
2059 cmd
->result
= (DID_ERROR
<< 16);
2060 cmd
->scsi_done(cmd
);
2062 DPRINTK("EXIT - internal\n");
2067 DPRINTK("EXIT - defer\n");
2068 if (rc
== ATA_DEFER_LINK
)
2069 return SCSI_MLQUEUE_DEVICE_BUSY
;
2071 return SCSI_MLQUEUE_HOST_BUSY
;
2074 struct ata_scsi_args
{
2075 struct ata_device
*dev
;
2077 struct scsi_cmnd
*cmd
;
2081 * ata_scsi_rbuf_get - Map response buffer.
2082 * @cmd: SCSI command containing buffer to be mapped.
2083 * @flags: unsigned long variable to store irq enable status
2084 * @copy_in: copy in from user buffer
2086 * Prepare buffer for simulated SCSI commands.
2089 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
2092 * Pointer to response buffer.
2094 static void *ata_scsi_rbuf_get(struct scsi_cmnd
*cmd
, bool copy_in
,
2095 unsigned long *flags
)
2097 spin_lock_irqsave(&ata_scsi_rbuf_lock
, *flags
);
2099 memset(ata_scsi_rbuf
, 0, ATA_SCSI_RBUF_SIZE
);
2101 sg_copy_to_buffer(scsi_sglist(cmd
), scsi_sg_count(cmd
),
2102 ata_scsi_rbuf
, ATA_SCSI_RBUF_SIZE
);
2103 return ata_scsi_rbuf
;
2107 * ata_scsi_rbuf_put - Unmap response buffer.
2108 * @cmd: SCSI command containing buffer to be unmapped.
2109 * @copy_out: copy out result
2110 * @flags: @flags passed to ata_scsi_rbuf_get()
2112 * Returns rbuf buffer. The result is copied to @cmd's buffer if
2113 * @copy_back is true.
2116 * Unlocks ata_scsi_rbuf_lock.
2118 static inline void ata_scsi_rbuf_put(struct scsi_cmnd
*cmd
, bool copy_out
,
2119 unsigned long *flags
)
2122 sg_copy_from_buffer(scsi_sglist(cmd
), scsi_sg_count(cmd
),
2123 ata_scsi_rbuf
, ATA_SCSI_RBUF_SIZE
);
2124 spin_unlock_irqrestore(&ata_scsi_rbuf_lock
, *flags
);
2128 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
2129 * @args: device IDENTIFY data / SCSI command of interest.
2130 * @actor: Callback hook for desired SCSI command simulator
2132 * Takes care of the hard work of simulating a SCSI command...
2133 * Mapping the response buffer, calling the command's handler,
2134 * and handling the handler's return value. This return value
2135 * indicates whether the handler wishes the SCSI command to be
2136 * completed successfully (0), or not (in which case cmd->result
2137 * and sense buffer are assumed to be set).
2140 * spin_lock_irqsave(host lock)
2142 static void ata_scsi_rbuf_fill(struct ata_scsi_args
*args
,
2143 unsigned int (*actor
)(struct ata_scsi_args
*args
, u8
*rbuf
))
2147 struct scsi_cmnd
*cmd
= args
->cmd
;
2148 unsigned long flags
;
2150 rbuf
= ata_scsi_rbuf_get(cmd
, false, &flags
);
2151 rc
= actor(args
, rbuf
);
2152 ata_scsi_rbuf_put(cmd
, rc
== 0, &flags
);
2155 cmd
->result
= SAM_STAT_GOOD
;
2159 * ata_scsiop_inq_std - Simulate INQUIRY command
2160 * @args: device IDENTIFY data / SCSI command of interest.
2161 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2163 * Returns standard device identification data associated
2164 * with non-VPD INQUIRY command output.
2167 * spin_lock_irqsave(host lock)
2169 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args
*args
, u8
*rbuf
)
2171 static const u8 versions
[] = {
2173 0x60, /* SAM-3 (no version claimed) */
2176 0x20, /* SBC-2 (no version claimed) */
2179 0x00 /* SPC-3 (no version claimed) */
2181 static const u8 versions_zbc
[] = {
2183 0xA0, /* SAM-5 (no version claimed) */
2186 0x00, /* SBC-4 (no version claimed) */
2189 0xC0, /* SPC-5 (no version claimed) */
2198 0x5, /* claim SPC-3 version compatibility */
2208 /* set scsi removable (RMB) bit per ata bit, or if the
2209 * AHCI port says it's external (Hotplug-capable, eSATA).
2211 if (ata_id_removable(args
->id
) ||
2212 (args
->dev
->link
->ap
->pflags
& ATA_PFLAG_EXTERNAL
))
2215 if (args
->dev
->class == ATA_DEV_ZAC
) {
2217 hdr
[2] = 0x7; /* claim SPC-5 version compatibility */
2220 memcpy(rbuf
, hdr
, sizeof(hdr
));
2221 memcpy(&rbuf
[8], "ATA ", 8);
2222 ata_id_string(args
->id
, &rbuf
[16], ATA_ID_PROD
, 16);
2224 /* From SAT, use last 2 words from fw rev unless they are spaces */
2225 ata_id_string(args
->id
, &rbuf
[32], ATA_ID_FW_REV
+ 2, 4);
2226 if (strncmp(&rbuf
[32], " ", 4) == 0)
2227 ata_id_string(args
->id
, &rbuf
[32], ATA_ID_FW_REV
, 4);
2229 if (rbuf
[32] == 0 || rbuf
[32] == ' ')
2230 memcpy(&rbuf
[32], "n/a ", 4);
2232 if (ata_id_zoned_cap(args
->id
) || args
->dev
->class == ATA_DEV_ZAC
)
2233 memcpy(rbuf
+ 58, versions_zbc
, sizeof(versions_zbc
));
2235 memcpy(rbuf
+ 58, versions
, sizeof(versions
));
2241 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
2242 * @args: device IDENTIFY data / SCSI command of interest.
2243 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2245 * Returns list of inquiry VPD pages available.
2248 * spin_lock_irqsave(host lock)
2250 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args
*args
, u8
*rbuf
)
2253 static const u8 pages
[] = {
2254 0x00, /* page 0x00, this page */
2255 0x80, /* page 0x80, unit serial no page */
2256 0x83, /* page 0x83, device ident page */
2257 0x89, /* page 0x89, ata info page */
2258 0xb0, /* page 0xb0, block limits page */
2259 0xb1, /* page 0xb1, block device characteristics page */
2260 0xb2, /* page 0xb2, thin provisioning page */
2261 0xb6, /* page 0xb6, zoned block device characteristics */
2264 num_pages
= sizeof(pages
);
2265 if (!(args
->dev
->flags
& ATA_DFLAG_ZAC
))
2267 rbuf
[3] = num_pages
; /* number of supported VPD pages */
2268 memcpy(rbuf
+ 4, pages
, num_pages
);
2273 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
2274 * @args: device IDENTIFY data / SCSI command of interest.
2275 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2277 * Returns ATA device serial number.
2280 * spin_lock_irqsave(host lock)
2282 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args
*args
, u8
*rbuf
)
2284 static const u8 hdr
[] = {
2286 0x80, /* this page code */
2288 ATA_ID_SERNO_LEN
, /* page len */
2291 memcpy(rbuf
, hdr
, sizeof(hdr
));
2292 ata_id_string(args
->id
, (unsigned char *) &rbuf
[4],
2293 ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
2298 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
2299 * @args: device IDENTIFY data / SCSI command of interest.
2300 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2302 * Yields two logical unit device identification designators:
2303 * - vendor specific ASCII containing the ATA serial number
2304 * - SAT defined "t10 vendor id based" containing ASCII vendor
2305 * name ("ATA "), model and serial numbers.
2308 * spin_lock_irqsave(host lock)
2310 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args
*args
, u8
*rbuf
)
2312 const int sat_model_serial_desc_len
= 68;
2315 rbuf
[1] = 0x83; /* this page code */
2318 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2320 rbuf
[num
+ 3] = ATA_ID_SERNO_LEN
;
2322 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
,
2323 ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
2324 num
+= ATA_ID_SERNO_LEN
;
2326 /* SAT defined lu model and serial numbers descriptor */
2327 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2330 rbuf
[num
+ 3] = sat_model_serial_desc_len
;
2332 memcpy(rbuf
+ num
, "ATA ", 8);
2334 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
, ATA_ID_PROD
,
2336 num
+= ATA_ID_PROD_LEN
;
2337 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
, ATA_ID_SERNO
,
2339 num
+= ATA_ID_SERNO_LEN
;
2341 if (ata_id_has_wwn(args
->id
)) {
2342 /* SAT defined lu world wide name */
2343 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
2346 rbuf
[num
+ 3] = ATA_ID_WWN_LEN
;
2348 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
,
2349 ATA_ID_WWN
, ATA_ID_WWN_LEN
);
2350 num
+= ATA_ID_WWN_LEN
;
2352 rbuf
[3] = num
- 4; /* page len (assume less than 256 bytes) */
2357 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2358 * @args: device IDENTIFY data / SCSI command of interest.
2359 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2361 * Yields SAT-specified ATA VPD page.
2364 * spin_lock_irqsave(host lock)
2366 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args
*args
, u8
*rbuf
)
2368 struct ata_taskfile tf
;
2370 memset(&tf
, 0, sizeof(tf
));
2372 rbuf
[1] = 0x89; /* our page code */
2373 rbuf
[2] = (0x238 >> 8); /* page size fixed at 238h */
2374 rbuf
[3] = (0x238 & 0xff);
2376 memcpy(&rbuf
[8], "linux ", 8);
2377 memcpy(&rbuf
[16], "libata ", 16);
2378 memcpy(&rbuf
[32], DRV_VERSION
, 4);
2380 /* we don't store the ATA device signature, so we fake it */
2382 tf
.command
= ATA_DRDY
; /* really, this is Status reg */
2386 ata_tf_to_fis(&tf
, 0, 1, &rbuf
[36]); /* TODO: PMP? */
2387 rbuf
[36] = 0x34; /* force D2H Reg FIS (34h) */
2389 rbuf
[56] = ATA_CMD_ID_ATA
;
2391 memcpy(&rbuf
[60], &args
->id
[0], 512);
2395 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args
*args
, u8
*rbuf
)
2400 rbuf
[3] = 0x3c; /* required VPD size with unmap support */
2403 * Optimal transfer length granularity.
2405 * This is always one physical block, but for disks with a smaller
2406 * logical than physical sector size we need to figure out what the
2409 min_io_sectors
= 1 << ata_id_log2_per_physical_sector(args
->id
);
2410 put_unaligned_be16(min_io_sectors
, &rbuf
[6]);
2413 * Optimal unmap granularity.
2415 * The ATA spec doesn't even know about a granularity or alignment
2416 * for the TRIM command. We can leave away most of the unmap related
2417 * VPD page entries, but we have specifify a granularity to signal
2418 * that we support some form of unmap - in thise case via WRITE SAME
2419 * with the unmap bit set.
2421 if (ata_id_has_trim(args
->id
)) {
2422 put_unaligned_be64(65535 * ATA_MAX_TRIM_RNUM
, &rbuf
[36]);
2423 put_unaligned_be32(1, &rbuf
[28]);
2429 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args
*args
, u8
*rbuf
)
2431 int form_factor
= ata_id_form_factor(args
->id
);
2432 int media_rotation_rate
= ata_id_rotation_rate(args
->id
);
2433 u8 zoned
= ata_id_zoned_cap(args
->id
);
2437 rbuf
[4] = media_rotation_rate
>> 8;
2438 rbuf
[5] = media_rotation_rate
;
2439 rbuf
[7] = form_factor
;
2441 rbuf
[8] = (zoned
<< 4);
2446 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args
*args
, u8
*rbuf
)
2448 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2451 rbuf
[5] = 1 << 6; /* TPWS */
2456 static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args
*args
, u8
*rbuf
)
2459 * zbc-r05 SCSI Zoned Block device characteristics VPD page
2465 * URSWRZ bit is only meaningful for host-managed ZAC drives
2467 if (args
->dev
->zac_zoned_cap
& 1)
2469 put_unaligned_be32(args
->dev
->zac_zones_optimal_open
, &rbuf
[8]);
2470 put_unaligned_be32(args
->dev
->zac_zones_optimal_nonseq
, &rbuf
[12]);
2471 put_unaligned_be32(args
->dev
->zac_zones_max_open
, &rbuf
[16]);
2477 * modecpy - Prepare response for MODE SENSE
2478 * @dest: output buffer
2479 * @src: data being copied
2480 * @n: length of mode page
2481 * @changeable: whether changeable parameters are requested
2483 * Generate a generic MODE SENSE page for either current or changeable
2489 static void modecpy(u8
*dest
, const u8
*src
, int n
, bool changeable
)
2492 memcpy(dest
, src
, 2);
2493 memset(dest
+ 2, 0, n
- 2);
2495 memcpy(dest
, src
, n
);
2500 * ata_msense_caching - Simulate MODE SENSE caching info page
2501 * @id: device IDENTIFY data
2502 * @buf: output buffer
2503 * @changeable: whether changeable parameters are requested
2505 * Generate a caching info page, which conditionally indicates
2506 * write caching to the SCSI layer, depending on device
2512 static unsigned int ata_msense_caching(u16
*id
, u8
*buf
, bool changeable
)
2514 modecpy(buf
, def_cache_mpage
, sizeof(def_cache_mpage
), changeable
);
2516 buf
[2] |= (1 << 2); /* ata_mselect_caching() */
2518 buf
[2] |= (ata_id_wcache_enabled(id
) << 2); /* write cache enable */
2519 buf
[12] |= (!ata_id_rahead_enabled(id
) << 5); /* disable read ahead */
2521 return sizeof(def_cache_mpage
);
2525 * ata_msense_control - Simulate MODE SENSE control mode page
2526 * @dev: ATA device of interest
2527 * @buf: output buffer
2528 * @changeable: whether changeable parameters are requested
2530 * Generate a generic MODE SENSE control mode page.
2535 static unsigned int ata_msense_control(struct ata_device
*dev
, u8
*buf
,
2538 modecpy(buf
, def_control_mpage
, sizeof(def_control_mpage
), changeable
);
2540 buf
[2] |= (1 << 2); /* ata_mselect_control() */
2542 bool d_sense
= (dev
->flags
& ATA_DFLAG_D_SENSE
);
2544 buf
[2] |= (d_sense
<< 2); /* descriptor format sense data */
2546 return sizeof(def_control_mpage
);
2550 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2551 * @buf: output buffer
2552 * @changeable: whether changeable parameters are requested
2554 * Generate a generic MODE SENSE r/w error recovery page.
2559 static unsigned int ata_msense_rw_recovery(u8
*buf
, bool changeable
)
2561 modecpy(buf
, def_rw_recovery_mpage
, sizeof(def_rw_recovery_mpage
),
2563 return sizeof(def_rw_recovery_mpage
);
2567 * We can turn this into a real blacklist if it's needed, for now just
2568 * blacklist any Maxtor BANC1G10 revision firmware
2570 static int ata_dev_supports_fua(u16
*id
)
2572 unsigned char model
[ATA_ID_PROD_LEN
+ 1], fw
[ATA_ID_FW_REV_LEN
+ 1];
2576 if (!ata_id_has_fua(id
))
2579 ata_id_c_string(id
, model
, ATA_ID_PROD
, sizeof(model
));
2580 ata_id_c_string(id
, fw
, ATA_ID_FW_REV
, sizeof(fw
));
2582 if (strcmp(model
, "Maxtor"))
2584 if (strcmp(fw
, "BANC1G10"))
2587 return 0; /* blacklisted */
2591 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2592 * @args: device IDENTIFY data / SCSI command of interest.
2593 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2595 * Simulate MODE SENSE commands. Assume this is invoked for direct
2596 * access devices (e.g. disks) only. There should be no block
2597 * descriptor for other device types.
2600 * spin_lock_irqsave(host lock)
2602 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args
*args
, u8
*rbuf
)
2604 struct ata_device
*dev
= args
->dev
;
2605 u8
*scsicmd
= args
->cmd
->cmnd
, *p
= rbuf
;
2606 static const u8 sat_blk_desc
[] = {
2607 0, 0, 0, 0, /* number of blocks: sat unspecified */
2609 0, 0x2, 0x0 /* block length: 512 bytes */
2612 unsigned int ebd
, page_control
, six_byte
;
2613 u8 dpofua
, bp
= 0xff;
2618 six_byte
= (scsicmd
[0] == MODE_SENSE
);
2619 ebd
= !(scsicmd
[1] & 0x8); /* dbd bit inverted == edb */
2621 * LLBA bit in msense(10) ignored (compliant)
2624 page_control
= scsicmd
[2] >> 6;
2625 switch (page_control
) {
2626 case 0: /* current */
2627 case 1: /* changeable */
2628 case 2: /* defaults */
2629 break; /* supported */
2631 goto saving_not_supp
;
2639 p
+= 4 + (ebd
? 8 : 0);
2641 p
+= 8 + (ebd
? 8 : 0);
2643 pg
= scsicmd
[2] & 0x3f;
2646 * No mode subpages supported (yet) but asking for _all_
2647 * subpages may be valid
2649 if (spg
&& (spg
!= ALL_SUB_MPAGES
)) {
2655 case RW_RECOVERY_MPAGE
:
2656 p
+= ata_msense_rw_recovery(p
, page_control
== 1);
2660 p
+= ata_msense_caching(args
->id
, p
, page_control
== 1);
2664 p
+= ata_msense_control(args
->dev
, p
, page_control
== 1);
2668 p
+= ata_msense_rw_recovery(p
, page_control
== 1);
2669 p
+= ata_msense_caching(args
->id
, p
, page_control
== 1);
2670 p
+= ata_msense_control(args
->dev
, p
, page_control
== 1);
2673 default: /* invalid page code */
2679 if (ata_dev_supports_fua(args
->id
) && (dev
->flags
& ATA_DFLAG_LBA48
) &&
2680 (!(dev
->flags
& ATA_DFLAG_PIO
) || dev
->multi_count
))
2684 rbuf
[0] = p
- rbuf
- 1;
2687 rbuf
[3] = sizeof(sat_blk_desc
);
2688 memcpy(rbuf
+ 4, sat_blk_desc
, sizeof(sat_blk_desc
));
2691 unsigned int output_len
= p
- rbuf
- 2;
2693 rbuf
[0] = output_len
>> 8;
2694 rbuf
[1] = output_len
;
2697 rbuf
[7] = sizeof(sat_blk_desc
);
2698 memcpy(rbuf
+ 8, sat_blk_desc
, sizeof(sat_blk_desc
));
2704 ata_scsi_set_invalid_field(dev
, args
->cmd
, fp
, bp
);
2708 ata_scsi_set_sense(dev
, args
->cmd
, ILLEGAL_REQUEST
, 0x39, 0x0);
2709 /* "Saving parameters not supported" */
2714 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2715 * @args: device IDENTIFY data / SCSI command of interest.
2716 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2718 * Simulate READ CAPACITY commands.
2723 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args
*args
, u8
*rbuf
)
2725 struct ata_device
*dev
= args
->dev
;
2726 u64 last_lba
= dev
->n_sectors
- 1; /* LBA of the last block */
2727 u32 sector_size
; /* physical sector size in bytes */
2731 sector_size
= ata_id_logical_sector_size(dev
->id
);
2732 log2_per_phys
= ata_id_log2_per_physical_sector(dev
->id
);
2733 lowest_aligned
= ata_id_logical_sector_offset(dev
->id
, log2_per_phys
);
2737 if (args
->cmd
->cmnd
[0] == READ_CAPACITY
) {
2738 if (last_lba
>= 0xffffffffULL
)
2739 last_lba
= 0xffffffff;
2741 /* sector count, 32-bit */
2742 rbuf
[0] = last_lba
>> (8 * 3);
2743 rbuf
[1] = last_lba
>> (8 * 2);
2744 rbuf
[2] = last_lba
>> (8 * 1);
2748 rbuf
[4] = sector_size
>> (8 * 3);
2749 rbuf
[5] = sector_size
>> (8 * 2);
2750 rbuf
[6] = sector_size
>> (8 * 1);
2751 rbuf
[7] = sector_size
;
2753 /* sector count, 64-bit */
2754 rbuf
[0] = last_lba
>> (8 * 7);
2755 rbuf
[1] = last_lba
>> (8 * 6);
2756 rbuf
[2] = last_lba
>> (8 * 5);
2757 rbuf
[3] = last_lba
>> (8 * 4);
2758 rbuf
[4] = last_lba
>> (8 * 3);
2759 rbuf
[5] = last_lba
>> (8 * 2);
2760 rbuf
[6] = last_lba
>> (8 * 1);
2764 rbuf
[ 8] = sector_size
>> (8 * 3);
2765 rbuf
[ 9] = sector_size
>> (8 * 2);
2766 rbuf
[10] = sector_size
>> (8 * 1);
2767 rbuf
[11] = sector_size
;
2770 rbuf
[13] = log2_per_phys
;
2771 rbuf
[14] = (lowest_aligned
>> 8) & 0x3f;
2772 rbuf
[15] = lowest_aligned
;
2774 if (ata_id_has_trim(args
->id
) &&
2775 !(dev
->horkage
& ATA_HORKAGE_NOTRIM
)) {
2776 rbuf
[14] |= 0x80; /* LBPME */
2778 if (ata_id_has_zero_after_trim(args
->id
) &&
2779 dev
->horkage
& ATA_HORKAGE_ZERO_AFTER_TRIM
) {
2780 ata_dev_info(dev
, "Enabling discard_zeroes_data\n");
2781 rbuf
[14] |= 0x40; /* LBPRZ */
2784 if (ata_id_zoned_cap(args
->id
) ||
2785 args
->dev
->class == ATA_DEV_ZAC
)
2786 rbuf
[12] = (1 << 4); /* RC_BASIS */
2792 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2793 * @args: device IDENTIFY data / SCSI command of interest.
2794 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2796 * Simulate REPORT LUNS command.
2799 * spin_lock_irqsave(host lock)
2801 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args
*args
, u8
*rbuf
)
2804 rbuf
[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2809 static void atapi_sense_complete(struct ata_queued_cmd
*qc
)
2811 if (qc
->err_mask
&& ((qc
->err_mask
& AC_ERR_DEV
) == 0)) {
2812 /* FIXME: not quite right; we don't want the
2813 * translation of taskfile registers into
2814 * a sense descriptors, since that's only
2815 * correct for ATA, not ATAPI
2817 ata_gen_passthru_sense(qc
);
2823 /* is it pointless to prefer PIO for "safety reasons"? */
2824 static inline int ata_pio_use_silly(struct ata_port
*ap
)
2826 return (ap
->flags
& ATA_FLAG_PIO_DMA
);
2829 static void atapi_request_sense(struct ata_queued_cmd
*qc
)
2831 struct ata_port
*ap
= qc
->ap
;
2832 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2834 DPRINTK("ATAPI request sense\n");
2836 memset(cmd
->sense_buffer
, 0, SCSI_SENSE_BUFFERSIZE
);
2838 #ifdef CONFIG_ATA_SFF
2839 if (ap
->ops
->sff_tf_read
)
2840 ap
->ops
->sff_tf_read(ap
, &qc
->tf
);
2843 /* fill these in, for the case where they are -not- overwritten */
2844 cmd
->sense_buffer
[0] = 0x70;
2845 cmd
->sense_buffer
[2] = qc
->tf
.feature
>> 4;
2849 /* setup sg table and init transfer direction */
2850 sg_init_one(&qc
->sgent
, cmd
->sense_buffer
, SCSI_SENSE_BUFFERSIZE
);
2851 ata_sg_init(qc
, &qc
->sgent
, 1);
2852 qc
->dma_dir
= DMA_FROM_DEVICE
;
2854 memset(&qc
->cdb
, 0, qc
->dev
->cdb_len
);
2855 qc
->cdb
[0] = REQUEST_SENSE
;
2856 qc
->cdb
[4] = SCSI_SENSE_BUFFERSIZE
;
2858 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2859 qc
->tf
.command
= ATA_CMD_PACKET
;
2861 if (ata_pio_use_silly(ap
)) {
2862 qc
->tf
.protocol
= ATAPI_PROT_DMA
;
2863 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
2865 qc
->tf
.protocol
= ATAPI_PROT_PIO
;
2866 qc
->tf
.lbam
= SCSI_SENSE_BUFFERSIZE
;
2869 qc
->nbytes
= SCSI_SENSE_BUFFERSIZE
;
2871 qc
->complete_fn
= atapi_sense_complete
;
2879 * ATAPI devices typically report zero for their SCSI version, and sometimes
2880 * deviate from the spec WRT response data format. If SCSI version is
2881 * reported as zero like normal, then we make the following fixups:
2882 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a
2884 * 2) Ensure response data format / ATAPI information are always correct.
2886 static void atapi_fixup_inquiry(struct scsi_cmnd
*cmd
)
2890 sg_copy_to_buffer(scsi_sglist(cmd
), scsi_sg_count(cmd
), buf
, 4);
2895 sg_copy_from_buffer(scsi_sglist(cmd
), scsi_sg_count(cmd
), buf
, 4);
2898 static void atapi_qc_complete(struct ata_queued_cmd
*qc
)
2900 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2901 unsigned int err_mask
= qc
->err_mask
;
2903 VPRINTK("ENTER, err_mask 0x%X\n", err_mask
);
2905 /* handle completion from new EH */
2906 if (unlikely(qc
->ap
->ops
->error_handler
&&
2907 (err_mask
|| qc
->flags
& ATA_QCFLAG_SENSE_VALID
))) {
2909 if (!(qc
->flags
& ATA_QCFLAG_SENSE_VALID
)) {
2910 /* FIXME: not quite right; we don't want the
2911 * translation of taskfile registers into a
2912 * sense descriptors, since that's only
2913 * correct for ATA, not ATAPI
2915 ata_gen_passthru_sense(qc
);
2918 /* SCSI EH automatically locks door if sdev->locked is
2919 * set. Sometimes door lock request continues to
2920 * fail, for example, when no media is present. This
2921 * creates a loop - SCSI EH issues door lock which
2922 * fails and gets invoked again to acquire sense data
2923 * for the failed command.
2925 * If door lock fails, always clear sdev->locked to
2926 * avoid this infinite loop.
2928 * This may happen before SCSI scan is complete. Make
2929 * sure qc->dev->sdev isn't NULL before dereferencing.
2931 if (qc
->cdb
[0] == ALLOW_MEDIUM_REMOVAL
&& qc
->dev
->sdev
)
2932 qc
->dev
->sdev
->locked
= 0;
2934 qc
->scsicmd
->result
= SAM_STAT_CHECK_CONDITION
;
2939 /* successful completion or old EH failure path */
2940 if (unlikely(err_mask
& AC_ERR_DEV
)) {
2941 cmd
->result
= SAM_STAT_CHECK_CONDITION
;
2942 atapi_request_sense(qc
);
2944 } else if (unlikely(err_mask
)) {
2945 /* FIXME: not quite right; we don't want the
2946 * translation of taskfile registers into
2947 * a sense descriptors, since that's only
2948 * correct for ATA, not ATAPI
2950 ata_gen_passthru_sense(qc
);
2952 if (cmd
->cmnd
[0] == INQUIRY
&& (cmd
->cmnd
[1] & 0x03) == 0)
2953 atapi_fixup_inquiry(cmd
);
2954 cmd
->result
= SAM_STAT_GOOD
;
2960 * atapi_xlat - Initialize PACKET taskfile
2961 * @qc: command structure to be initialized
2964 * spin_lock_irqsave(host lock)
2967 * Zero on success, non-zero on failure.
2969 static unsigned int atapi_xlat(struct ata_queued_cmd
*qc
)
2971 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
2972 struct ata_device
*dev
= qc
->dev
;
2973 int nodata
= (scmd
->sc_data_direction
== DMA_NONE
);
2974 int using_pio
= !nodata
&& (dev
->flags
& ATA_DFLAG_PIO
);
2975 unsigned int nbytes
;
2977 memset(qc
->cdb
, 0, dev
->cdb_len
);
2978 memcpy(qc
->cdb
, scmd
->cmnd
, scmd
->cmd_len
);
2980 qc
->complete_fn
= atapi_qc_complete
;
2982 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2983 if (scmd
->sc_data_direction
== DMA_TO_DEVICE
) {
2984 qc
->tf
.flags
|= ATA_TFLAG_WRITE
;
2985 DPRINTK("direction: write\n");
2988 qc
->tf
.command
= ATA_CMD_PACKET
;
2989 ata_qc_set_pc_nbytes(qc
);
2991 /* check whether ATAPI DMA is safe */
2992 if (!nodata
&& !using_pio
&& atapi_check_dma(qc
))
2995 /* Some controller variants snoop this value for Packet
2996 * transfers to do state machine and FIFO management. Thus we
2997 * want to set it properly, and for DMA where it is
2998 * effectively meaningless.
3000 nbytes
= min(ata_qc_raw_nbytes(qc
), (unsigned int)63 * 1024);
3002 /* Most ATAPI devices which honor transfer chunk size don't
3003 * behave according to the spec when odd chunk size which
3004 * matches the transfer length is specified. If the number of
3005 * bytes to transfer is 2n+1. According to the spec, what
3006 * should happen is to indicate that 2n+1 is going to be
3007 * transferred and transfer 2n+2 bytes where the last byte is
3010 * In practice, this doesn't happen. ATAPI devices first
3011 * indicate and transfer 2n bytes and then indicate and
3012 * transfer 2 bytes where the last byte is padding.
3014 * This inconsistency confuses several controllers which
3015 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
3016 * These controllers use actual number of transferred bytes to
3017 * update DMA poitner and transfer of 4n+2 bytes make those
3018 * controller push DMA pointer by 4n+4 bytes because SATA data
3019 * FISes are aligned to 4 bytes. This causes data corruption
3020 * and buffer overrun.
3022 * Always setting nbytes to even number solves this problem
3023 * because then ATAPI devices don't have to split data at 2n
3029 qc
->tf
.lbam
= (nbytes
& 0xFF);
3030 qc
->tf
.lbah
= (nbytes
>> 8);
3033 qc
->tf
.protocol
= ATAPI_PROT_NODATA
;
3035 qc
->tf
.protocol
= ATAPI_PROT_PIO
;
3038 qc
->tf
.protocol
= ATAPI_PROT_DMA
;
3039 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
3041 if ((dev
->flags
& ATA_DFLAG_DMADIR
) &&
3042 (scmd
->sc_data_direction
!= DMA_TO_DEVICE
))
3043 /* some SATA bridges need us to indicate data xfer direction */
3044 qc
->tf
.feature
|= ATAPI_DMADIR
;
3048 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
3049 as ATAPI tape drives don't get this right otherwise */
3053 static struct ata_device
*ata_find_dev(struct ata_port
*ap
, int devno
)
3055 if (!sata_pmp_attached(ap
)) {
3056 if (likely(devno
>= 0 &&
3057 devno
< ata_link_max_devices(&ap
->link
)))
3058 return &ap
->link
.device
[devno
];
3060 if (likely(devno
>= 0 &&
3061 devno
< ap
->nr_pmp_links
))
3062 return &ap
->pmp_link
[devno
].device
[0];
3068 static struct ata_device
*__ata_scsi_find_dev(struct ata_port
*ap
,
3069 const struct scsi_device
*scsidev
)
3073 /* skip commands not addressed to targets we simulate */
3074 if (!sata_pmp_attached(ap
)) {
3075 if (unlikely(scsidev
->channel
|| scsidev
->lun
))
3077 devno
= scsidev
->id
;
3079 if (unlikely(scsidev
->id
|| scsidev
->lun
))
3081 devno
= scsidev
->channel
;
3084 return ata_find_dev(ap
, devno
);
3088 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
3089 * @ap: ATA port to which the device is attached
3090 * @scsidev: SCSI device from which we derive the ATA device
3092 * Given various information provided in struct scsi_cmnd,
3093 * map that onto an ATA bus, and using that mapping
3094 * determine which ata_device is associated with the
3095 * SCSI command to be sent.
3098 * spin_lock_irqsave(host lock)
3101 * Associated ATA device, or %NULL if not found.
3103 static struct ata_device
*
3104 ata_scsi_find_dev(struct ata_port
*ap
, const struct scsi_device
*scsidev
)
3106 struct ata_device
*dev
= __ata_scsi_find_dev(ap
, scsidev
);
3108 if (unlikely(!dev
|| !ata_dev_enabled(dev
)))
3115 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
3116 * @byte1: Byte 1 from pass-thru CDB.
3119 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
3122 ata_scsi_map_proto(u8 byte1
)
3124 switch((byte1
& 0x1e) >> 1) {
3125 case 3: /* Non-data */
3126 return ATA_PROT_NODATA
;
3129 case 10: /* UDMA Data-in */
3130 case 11: /* UDMA Data-Out */
3131 return ATA_PROT_DMA
;
3133 case 4: /* PIO Data-in */
3134 case 5: /* PIO Data-out */
3135 return ATA_PROT_PIO
;
3137 case 12: /* FPDMA */
3138 return ATA_PROT_NCQ
;
3140 case 0: /* Hard Reset */
3142 case 8: /* Device Diagnostic */
3143 case 9: /* Device Reset */
3144 case 7: /* DMA Queued */
3145 case 15: /* Return Response Info */
3146 default: /* Reserved */
3150 return ATA_PROT_UNKNOWN
;
3154 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
3155 * @qc: command structure to be initialized
3157 * Handles either 12, 16, or 32-byte versions of the CDB.
3160 * Zero on success, non-zero on failure.
3162 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd
*qc
)
3164 struct ata_taskfile
*tf
= &(qc
->tf
);
3165 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
3166 struct ata_device
*dev
= qc
->dev
;
3167 const u8
*cdb
= scmd
->cmnd
;
3171 /* 7Fh variable length cmd means a ata pass-thru(32) */
3172 if (cdb
[0] == VARIABLE_LENGTH_CMD
)
3175 tf
->protocol
= ata_scsi_map_proto(cdb
[1 + cdb_offset
]);
3176 if (tf
->protocol
== ATA_PROT_UNKNOWN
) {
3181 if (ata_is_ncq(tf
->protocol
) && (cdb
[2 + cdb_offset
] & 0x3) == 0)
3182 tf
->protocol
= ATA_PROT_NCQ_NODATA
;
3185 tf
->flags
|= ATA_TFLAG_LBA
;
3188 * 12 and 16 byte CDBs use different offsets to
3189 * provide the various register values.
3191 if (cdb
[0] == ATA_16
) {
3193 * 16-byte CDB - may contain extended commands.
3195 * If that is the case, copy the upper byte register values.
3197 if (cdb
[1] & 0x01) {
3198 tf
->hob_feature
= cdb
[3];
3199 tf
->hob_nsect
= cdb
[5];
3200 tf
->hob_lbal
= cdb
[7];
3201 tf
->hob_lbam
= cdb
[9];
3202 tf
->hob_lbah
= cdb
[11];
3203 tf
->flags
|= ATA_TFLAG_LBA48
;
3205 tf
->flags
&= ~ATA_TFLAG_LBA48
;
3208 * Always copy low byte, device and command registers.
3210 tf
->feature
= cdb
[4];
3215 tf
->device
= cdb
[13];
3216 tf
->command
= cdb
[14];
3217 } else if (cdb
[0] == ATA_12
) {
3219 * 12-byte CDB - incapable of extended commands.
3221 tf
->flags
&= ~ATA_TFLAG_LBA48
;
3223 tf
->feature
= cdb
[3];
3228 tf
->device
= cdb
[8];
3229 tf
->command
= cdb
[9];
3232 * 32-byte CDB - may contain extended command fields.
3234 * If that is the case, copy the upper byte register values.
3236 if (cdb
[10] & 0x01) {
3237 tf
->hob_feature
= cdb
[20];
3238 tf
->hob_nsect
= cdb
[22];
3239 tf
->hob_lbal
= cdb
[16];
3240 tf
->hob_lbam
= cdb
[15];
3241 tf
->hob_lbah
= cdb
[14];
3242 tf
->flags
|= ATA_TFLAG_LBA48
;
3244 tf
->flags
&= ~ATA_TFLAG_LBA48
;
3246 tf
->feature
= cdb
[21];
3247 tf
->nsect
= cdb
[23];
3251 tf
->device
= cdb
[24];
3252 tf
->command
= cdb
[25];
3253 tf
->auxiliary
= get_unaligned_be32(&cdb
[28]);
3256 /* For NCQ commands copy the tag value */
3257 if (ata_is_ncq(tf
->protocol
))
3258 tf
->nsect
= qc
->tag
<< 3;
3260 /* enforce correct master/slave bit */
3261 tf
->device
= dev
->devno
?
3262 tf
->device
| ATA_DEV1
: tf
->device
& ~ATA_DEV1
;
3264 switch (tf
->command
) {
3265 /* READ/WRITE LONG use a non-standard sect_size */
3266 case ATA_CMD_READ_LONG
:
3267 case ATA_CMD_READ_LONG_ONCE
:
3268 case ATA_CMD_WRITE_LONG
:
3269 case ATA_CMD_WRITE_LONG_ONCE
:
3270 if (tf
->protocol
!= ATA_PROT_PIO
|| tf
->nsect
!= 1) {
3274 qc
->sect_size
= scsi_bufflen(scmd
);
3277 /* commands using reported Logical Block size (e.g. 512 or 4K) */
3278 case ATA_CMD_CFA_WRITE_NE
:
3279 case ATA_CMD_CFA_TRANS_SECT
:
3280 case ATA_CMD_CFA_WRITE_MULT_NE
:
3281 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
3283 case ATA_CMD_READ_EXT
:
3284 case ATA_CMD_READ_QUEUED
:
3285 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
3286 case ATA_CMD_FPDMA_READ
:
3287 case ATA_CMD_READ_MULTI
:
3288 case ATA_CMD_READ_MULTI_EXT
:
3289 case ATA_CMD_PIO_READ
:
3290 case ATA_CMD_PIO_READ_EXT
:
3291 case ATA_CMD_READ_STREAM_DMA_EXT
:
3292 case ATA_CMD_READ_STREAM_EXT
:
3293 case ATA_CMD_VERIFY
:
3294 case ATA_CMD_VERIFY_EXT
:
3296 case ATA_CMD_WRITE_EXT
:
3297 case ATA_CMD_WRITE_FUA_EXT
:
3298 case ATA_CMD_WRITE_QUEUED
:
3299 case ATA_CMD_WRITE_QUEUED_FUA_EXT
:
3300 case ATA_CMD_FPDMA_WRITE
:
3301 case ATA_CMD_WRITE_MULTI
:
3302 case ATA_CMD_WRITE_MULTI_EXT
:
3303 case ATA_CMD_WRITE_MULTI_FUA_EXT
:
3304 case ATA_CMD_PIO_WRITE
:
3305 case ATA_CMD_PIO_WRITE_EXT
:
3306 case ATA_CMD_WRITE_STREAM_DMA_EXT
:
3307 case ATA_CMD_WRITE_STREAM_EXT
:
3308 qc
->sect_size
= scmd
->device
->sector_size
;
3311 /* Everything else uses 512 byte "sectors" */
3313 qc
->sect_size
= ATA_SECT_SIZE
;
3317 * Set flags so that all registers will be written, pass on
3318 * write indication (used for PIO/DMA setup), result TF is
3319 * copied back and we don't whine too much about its failure.
3321 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
3322 if (scmd
->sc_data_direction
== DMA_TO_DEVICE
)
3323 tf
->flags
|= ATA_TFLAG_WRITE
;
3325 qc
->flags
|= ATA_QCFLAG_RESULT_TF
| ATA_QCFLAG_QUIET
;
3328 * Set transfer length.
3330 * TODO: find out if we need to do more here to
3331 * cover scatter/gather case.
3333 ata_qc_set_pc_nbytes(qc
);
3335 /* We may not issue DMA commands if no DMA mode is set */
3336 if (tf
->protocol
== ATA_PROT_DMA
&& dev
->dma_mode
== 0) {
3341 /* We may not issue NCQ commands to devices not supporting NCQ */
3342 if (ata_is_ncq(tf
->protocol
) && !ata_ncq_enabled(dev
)) {
3347 /* sanity check for pio multi commands */
3348 if ((cdb
[1] & 0xe0) && !is_multi_taskfile(tf
)) {
3353 if (is_multi_taskfile(tf
)) {
3354 unsigned int multi_count
= 1 << (cdb
[1] >> 5);
3356 /* compare the passed through multi_count
3357 * with the cached multi_count of libata
3359 if (multi_count
!= dev
->multi_count
)
3360 ata_dev_warn(dev
, "invalid multi_count %u ignored\n",
3365 * Filter SET_FEATURES - XFER MODE command -- otherwise,
3366 * SET_FEATURES - XFER MODE must be preceded/succeeded
3367 * by an update to hardware-specific registers for each
3368 * controller (i.e. the reason for ->set_piomode(),
3369 * ->set_dmamode(), and ->post_set_mode() hooks).
3371 if (tf
->command
== ATA_CMD_SET_FEATURES
&&
3372 tf
->feature
== SETFEATURES_XFER
) {
3373 fp
= (cdb
[0] == ATA_16
) ? 4 : 3;
3378 * Filter TPM commands by default. These provide an
3379 * essentially uncontrolled encrypted "back door" between
3380 * applications and the disk. Set libata.allow_tpm=1 if you
3381 * have a real reason for wanting to use them. This ensures
3382 * that installed software cannot easily mess stuff up without
3383 * user intent. DVR type users will probably ship with this enabled
3384 * for movie content management.
3386 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
3387 * for this and should do in future but that it is not sufficient as
3388 * DCS is an optional feature set. Thus we also do the software filter
3389 * so that we comply with the TC consortium stated goal that the user
3390 * can turn off TC features of their system.
3392 if (tf
->command
>= 0x5C && tf
->command
<= 0x5F && !libata_allow_tpm
) {
3393 fp
= (cdb
[0] == ATA_16
) ? 14 : 9;
3400 ata_scsi_set_invalid_field(dev
, scmd
, fp
, 0xff);
3405 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim
3406 * @cmd: SCSI command being translated
3407 * @trmax: Maximum number of entries that will fit in sector_size bytes.
3408 * @sector: Starting sector
3409 * @count: Total Range of request in logical sectors
3411 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted
3414 * Upto 64 entries of the format:
3415 * 63:48 Range Length
3418 * Range Length of 0 is ignored.
3419 * LBA's should be sorted order and not overlap.
3421 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET
3423 * Return: Number of bytes copied into sglist.
3425 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd
*cmd
, u32 trmax
,
3426 u64 sector
, u32 count
)
3428 struct scsi_device
*sdp
= cmd
->device
;
3429 size_t len
= sdp
->sector_size
;
3433 unsigned long flags
;
3435 WARN_ON(len
> ATA_SCSI_RBUF_SIZE
);
3437 if (len
> ATA_SCSI_RBUF_SIZE
)
3438 len
= ATA_SCSI_RBUF_SIZE
;
3440 spin_lock_irqsave(&ata_scsi_rbuf_lock
, flags
);
3441 buf
= ((void *)ata_scsi_rbuf
);
3442 memset(buf
, 0, len
);
3444 u64 entry
= sector
|
3445 ((u64
)(count
> 0xffff ? 0xffff : count
) << 48);
3446 buf
[i
++] = __cpu_to_le64(entry
);
3447 if (count
<= 0xffff)
3452 r
= sg_copy_from_buffer(scsi_sglist(cmd
), scsi_sg_count(cmd
), buf
, len
);
3453 spin_unlock_irqrestore(&ata_scsi_rbuf_lock
, flags
);
3459 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same
3460 * @qc: Command to be translated
3462 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or
3463 * an SCT Write Same command.
3464 * Based on WRITE SAME has the UNMAP flag:
3466 * - When set translate to DSM TRIM
3467 * - When clear translate to SCT Write Same
3469 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd
*qc
)
3471 struct ata_taskfile
*tf
= &qc
->tf
;
3472 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
3473 struct scsi_device
*sdp
= scmd
->device
;
3474 size_t len
= sdp
->sector_size
;
3475 struct ata_device
*dev
= qc
->dev
;
3476 const u8
*cdb
= scmd
->cmnd
;
3479 const u32 trmax
= len
>> 3;
3483 u8 unmap
= cdb
[1] & 0x8;
3485 /* we may not issue DMA commands if no DMA mode is set */
3486 if (unlikely(!dev
->dma_mode
))
3487 goto invalid_opcode
;
3490 * We only allow sending this command through the block layer,
3491 * as it modifies the DATA OUT buffer, which would corrupt user
3492 * memory for SG_IO commands.
3494 if (unlikely(blk_rq_is_passthrough(scmd
->request
)))
3495 goto invalid_opcode
;
3497 if (unlikely(scmd
->cmd_len
< 16)) {
3501 scsi_16_lba_len(cdb
, &block
, &n_block
);
3504 (dev
->horkage
& ATA_HORKAGE_NOTRIM
) ||
3505 !ata_id_has_trim(dev
->id
)) {
3510 /* If the request is too large the cmd is invalid */
3511 if (n_block
> 0xffff * trmax
) {
3517 * WRITE SAME always has a sector sized buffer as payload, this
3518 * should never be a multiple entry S/G list.
3520 if (!scsi_sg_count(scmd
))
3521 goto invalid_param_len
;
3524 * size must match sector size in bytes
3525 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count)
3526 * is defined as number of 512 byte blocks to be transferred.
3529 size
= ata_format_dsm_trim_descr(scmd
, trmax
, block
, n_block
);
3531 goto invalid_param_len
;
3533 if (ata_ncq_enabled(dev
) && ata_fpdma_dsm_supported(dev
)) {
3534 /* Newer devices support queued TRIM commands */
3535 tf
->protocol
= ATA_PROT_NCQ
;
3536 tf
->command
= ATA_CMD_FPDMA_SEND
;
3537 tf
->hob_nsect
= ATA_SUBCMD_FPDMA_SEND_DSM
& 0x1f;
3538 tf
->nsect
= qc
->tag
<< 3;
3539 tf
->hob_feature
= (size
/ 512) >> 8;
3540 tf
->feature
= size
/ 512;
3544 tf
->protocol
= ATA_PROT_DMA
;
3545 tf
->hob_feature
= 0;
3546 tf
->feature
= ATA_DSM_TRIM
;
3547 tf
->hob_nsect
= (size
/ 512) >> 8;
3548 tf
->nsect
= size
/ 512;
3549 tf
->command
= ATA_CMD_DSM
;
3552 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_LBA48
|
3555 ata_qc_set_pc_nbytes(qc
);
3560 ata_scsi_set_invalid_field(dev
, scmd
, fp
, bp
);
3563 /* "Parameter list length error" */
3564 ata_scsi_set_sense(dev
, scmd
, ILLEGAL_REQUEST
, 0x1a, 0x0);
3567 /* "Invalid command operation code" */
3568 ata_scsi_set_sense(dev
, scmd
, ILLEGAL_REQUEST
, 0x20, 0x0);
3573 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN
3574 * @args: device MAINTENANCE_IN data / SCSI command of interest.
3575 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
3577 * Yields a subset to satisfy scsi_report_opcode()
3580 * spin_lock_irqsave(host lock)
3582 static unsigned int ata_scsiop_maint_in(struct ata_scsi_args
*args
, u8
*rbuf
)
3584 struct ata_device
*dev
= args
->dev
;
3585 u8
*cdb
= args
->cmd
->cmnd
;
3587 unsigned int err
= 0;
3590 ata_dev_warn(dev
, "invalid command format %d\n", cdb
[2]);
3599 case SERVICE_ACTION_IN_16
:
3602 case SYNCHRONIZE_CACHE
:
3606 case TEST_UNIT_READY
:
3607 case SEND_DIAGNOSTIC
:
3608 case MAINTENANCE_IN
:
3620 case MODE_SELECT_10
:
3626 if (ata_id_zoned_cap(dev
->id
) ||
3627 dev
->class == ATA_DEV_ZAC
)
3630 case SECURITY_PROTOCOL_IN
:
3631 case SECURITY_PROTOCOL_OUT
:
3632 if (dev
->flags
& ATA_DFLAG_TRUSTED
)
3639 rbuf
[1] = supported
; /* supported */
3644 * ata_scsi_report_zones_complete - convert ATA output
3645 * @qc: command structure returning the data
3647 * Convert T-13 little-endian field representation into
3648 * T-10 big-endian field representation.
3651 static void ata_scsi_report_zones_complete(struct ata_queued_cmd
*qc
)
3653 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
3654 struct sg_mapping_iter miter
;
3655 unsigned long flags
;
3656 unsigned int bytes
= 0;
3658 sg_miter_start(&miter
, scsi_sglist(scmd
), scsi_sg_count(scmd
),
3659 SG_MITER_TO_SG
| SG_MITER_ATOMIC
);
3661 local_irq_save(flags
);
3662 while (sg_miter_next(&miter
)) {
3663 unsigned int offset
= 0;
3668 u64 max_lba
, opt_lba
;
3671 /* Swizzle header */
3673 list_length
= get_unaligned_le32(&hdr
[0]);
3674 same
= get_unaligned_le16(&hdr
[4]);
3675 max_lba
= get_unaligned_le64(&hdr
[8]);
3676 opt_lba
= get_unaligned_le64(&hdr
[16]);
3677 put_unaligned_be32(list_length
, &hdr
[0]);
3678 hdr
[4] = same
& 0xf;
3679 put_unaligned_be64(max_lba
, &hdr
[8]);
3680 put_unaligned_be64(opt_lba
, &hdr
[16]);
3684 while (offset
< miter
.length
) {
3686 u8 cond
, type
, non_seq
, reset
;
3687 u64 size
, start
, wp
;
3689 /* Swizzle zone descriptor */
3690 rec
= miter
.addr
+ offset
;
3691 type
= rec
[0] & 0xf;
3692 cond
= (rec
[1] >> 4) & 0xf;
3693 non_seq
= (rec
[1] & 2);
3694 reset
= (rec
[1] & 1);
3695 size
= get_unaligned_le64(&rec
[8]);
3696 start
= get_unaligned_le64(&rec
[16]);
3697 wp
= get_unaligned_le64(&rec
[24]);
3699 rec
[1] = (cond
<< 4) | non_seq
| reset
;
3700 put_unaligned_be64(size
, &rec
[8]);
3701 put_unaligned_be64(start
, &rec
[16]);
3702 put_unaligned_be64(wp
, &rec
[24]);
3703 WARN_ON(offset
+ 64 > miter
.length
);
3708 sg_miter_stop(&miter
);
3709 local_irq_restore(flags
);
3711 ata_scsi_qc_complete(qc
);
3714 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd
*qc
)
3716 struct ata_taskfile
*tf
= &qc
->tf
;
3717 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
3718 const u8
*cdb
= scmd
->cmnd
;
3719 u16 sect
, fp
= (u16
)-1;
3720 u8 sa
, options
, bp
= 0xff;
3724 if (unlikely(scmd
->cmd_len
< 16)) {
3725 ata_dev_warn(qc
->dev
, "invalid cdb length %d\n",
3730 scsi_16_lba_len(cdb
, &block
, &n_block
);
3731 if (n_block
!= scsi_bufflen(scmd
)) {
3732 ata_dev_warn(qc
->dev
, "non-matching transfer count (%d/%d)\n",
3733 n_block
, scsi_bufflen(scmd
));
3734 goto invalid_param_len
;
3737 if (sa
!= ZI_REPORT_ZONES
) {
3738 ata_dev_warn(qc
->dev
, "invalid service action %d\n", sa
);
3743 * ZAC allows only for transfers in 512 byte blocks,
3744 * and uses a 16 bit value for the transfer count.
3746 if ((n_block
/ 512) > 0xffff || n_block
< 512 || (n_block
% 512)) {
3747 ata_dev_warn(qc
->dev
, "invalid transfer count %d\n", n_block
);
3748 goto invalid_param_len
;
3750 sect
= n_block
/ 512;
3751 options
= cdb
[14] & 0xbf;
3753 if (ata_ncq_enabled(qc
->dev
) &&
3754 ata_fpdma_zac_mgmt_in_supported(qc
->dev
)) {
3755 tf
->protocol
= ATA_PROT_NCQ
;
3756 tf
->command
= ATA_CMD_FPDMA_RECV
;
3757 tf
->hob_nsect
= ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN
& 0x1f;
3758 tf
->nsect
= qc
->tag
<< 3;
3759 tf
->feature
= sect
& 0xff;
3760 tf
->hob_feature
= (sect
>> 8) & 0xff;
3761 tf
->auxiliary
= ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES
| (options
<< 8);
3763 tf
->command
= ATA_CMD_ZAC_MGMT_IN
;
3764 tf
->feature
= ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES
;
3765 tf
->protocol
= ATA_PROT_DMA
;
3766 tf
->hob_feature
= options
;
3767 tf
->hob_nsect
= (sect
>> 8) & 0xff;
3768 tf
->nsect
= sect
& 0xff;
3770 tf
->device
= ATA_LBA
;
3771 tf
->lbah
= (block
>> 16) & 0xff;
3772 tf
->lbam
= (block
>> 8) & 0xff;
3773 tf
->lbal
= block
& 0xff;
3774 tf
->hob_lbah
= (block
>> 40) & 0xff;
3775 tf
->hob_lbam
= (block
>> 32) & 0xff;
3776 tf
->hob_lbal
= (block
>> 24) & 0xff;
3778 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_LBA48
;
3779 qc
->flags
|= ATA_QCFLAG_RESULT_TF
;
3781 ata_qc_set_pc_nbytes(qc
);
3783 qc
->complete_fn
= ata_scsi_report_zones_complete
;
3788 ata_scsi_set_invalid_field(qc
->dev
, scmd
, fp
, bp
);
3792 /* "Parameter list length error" */
3793 ata_scsi_set_sense(qc
->dev
, scmd
, ILLEGAL_REQUEST
, 0x1a, 0x0);
3797 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd
*qc
)
3799 struct ata_taskfile
*tf
= &qc
->tf
;
3800 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
3801 struct ata_device
*dev
= qc
->dev
;
3802 const u8
*cdb
= scmd
->cmnd
;
3808 if (unlikely(scmd
->cmd_len
< 16)) {
3814 if ((sa
!= ZO_CLOSE_ZONE
) && (sa
!= ZO_FINISH_ZONE
) &&
3815 (sa
!= ZO_OPEN_ZONE
) && (sa
!= ZO_RESET_WRITE_POINTER
)) {
3820 scsi_16_lba_len(cdb
, &block
, &n_block
);
3823 * ZAC MANAGEMENT OUT doesn't define any length
3825 goto invalid_param_len
;
3828 all
= cdb
[14] & 0x1;
3831 * Ignore the block address (zone ID) as defined by ZBC.
3834 } else if (block
>= dev
->n_sectors
) {
3836 * Block must be a valid zone ID (a zone start LBA).
3842 if (ata_ncq_enabled(qc
->dev
) &&
3843 ata_fpdma_zac_mgmt_out_supported(qc
->dev
)) {
3844 tf
->protocol
= ATA_PROT_NCQ_NODATA
;
3845 tf
->command
= ATA_CMD_NCQ_NON_DATA
;
3846 tf
->feature
= ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT
;
3847 tf
->nsect
= qc
->tag
<< 3;
3848 tf
->auxiliary
= sa
| ((u16
)all
<< 8);
3850 tf
->protocol
= ATA_PROT_NODATA
;
3851 tf
->command
= ATA_CMD_ZAC_MGMT_OUT
;
3853 tf
->hob_feature
= all
;
3855 tf
->lbah
= (block
>> 16) & 0xff;
3856 tf
->lbam
= (block
>> 8) & 0xff;
3857 tf
->lbal
= block
& 0xff;
3858 tf
->hob_lbah
= (block
>> 40) & 0xff;
3859 tf
->hob_lbam
= (block
>> 32) & 0xff;
3860 tf
->hob_lbal
= (block
>> 24) & 0xff;
3861 tf
->device
= ATA_LBA
;
3862 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_LBA48
;
3867 ata_scsi_set_invalid_field(qc
->dev
, scmd
, fp
, 0xff);
3870 /* "Parameter list length error" */
3871 ata_scsi_set_sense(qc
->dev
, scmd
, ILLEGAL_REQUEST
, 0x1a, 0x0);
3876 * ata_mselect_caching - Simulate MODE SELECT for caching info page
3877 * @qc: Storage for translated ATA taskfile
3878 * @buf: input buffer
3879 * @len: number of valid bytes in the input buffer
3880 * @fp: out parameter for the failed field on error
3882 * Prepare a taskfile to modify caching information for the device.
3887 static int ata_mselect_caching(struct ata_queued_cmd
*qc
,
3888 const u8
*buf
, int len
, u16
*fp
)
3890 struct ata_taskfile
*tf
= &qc
->tf
;
3891 struct ata_device
*dev
= qc
->dev
;
3892 u8 mpage
[CACHE_MPAGE_LEN
];
3897 * The first two bytes of def_cache_mpage are a header, so offsets
3898 * in mpage are off by 2 compared to buf. Same for len.
3901 if (len
!= CACHE_MPAGE_LEN
- 2) {
3902 if (len
< CACHE_MPAGE_LEN
- 2)
3905 *fp
= CACHE_MPAGE_LEN
- 2;
3909 wce
= buf
[0] & (1 << 2);
3912 * Check that read-only bits are not modified.
3914 ata_msense_caching(dev
->id
, mpage
, false);
3915 for (i
= 0; i
< CACHE_MPAGE_LEN
- 2; i
++) {
3918 if (mpage
[i
+ 2] != buf
[i
]) {
3924 tf
->flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
3925 tf
->protocol
= ATA_PROT_NODATA
;
3927 tf
->command
= ATA_CMD_SET_FEATURES
;
3928 tf
->feature
= wce
? SETFEATURES_WC_ON
: SETFEATURES_WC_OFF
;
3933 * ata_mselect_control - Simulate MODE SELECT for control page
3934 * @qc: Storage for translated ATA taskfile
3935 * @buf: input buffer
3936 * @len: number of valid bytes in the input buffer
3937 * @fp: out parameter for the failed field on error
3939 * Prepare a taskfile to modify caching information for the device.
3944 static int ata_mselect_control(struct ata_queued_cmd
*qc
,
3945 const u8
*buf
, int len
, u16
*fp
)
3947 struct ata_device
*dev
= qc
->dev
;
3948 u8 mpage
[CONTROL_MPAGE_LEN
];
3953 * The first two bytes of def_control_mpage are a header, so offsets
3954 * in mpage are off by 2 compared to buf. Same for len.
3957 if (len
!= CONTROL_MPAGE_LEN
- 2) {
3958 if (len
< CONTROL_MPAGE_LEN
- 2)
3961 *fp
= CONTROL_MPAGE_LEN
- 2;
3965 d_sense
= buf
[0] & (1 << 2);
3968 * Check that read-only bits are not modified.
3970 ata_msense_control(dev
, mpage
, false);
3971 for (i
= 0; i
< CONTROL_MPAGE_LEN
- 2; i
++) {
3974 if (mpage
[2 + i
] != buf
[i
]) {
3979 if (d_sense
& (1 << 2))
3980 dev
->flags
|= ATA_DFLAG_D_SENSE
;
3982 dev
->flags
&= ~ATA_DFLAG_D_SENSE
;
3987 * ata_scsi_mode_select_xlat - Simulate MODE SELECT 6, 10 commands
3988 * @qc: Storage for translated ATA taskfile
3990 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile.
3991 * Assume this is invoked for direct access devices (e.g. disks) only.
3992 * There should be no block descriptor for other device types.
3995 * spin_lock_irqsave(host lock)
3997 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd
*qc
)
3999 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
4000 const u8
*cdb
= scmd
->cmnd
;
4003 unsigned six_byte
, pg_len
, hdr_len
, bd_len
;
4010 six_byte
= (cdb
[0] == MODE_SELECT
);
4012 if (scmd
->cmd_len
< 5) {
4020 if (scmd
->cmd_len
< 9) {
4025 len
= (cdb
[7] << 8) + cdb
[8];
4029 /* We only support PF=1, SP=0. */
4030 if ((cdb
[1] & 0x11) != 0x10) {
4032 bp
= (cdb
[1] & 0x01) ? 1 : 5;
4036 /* Test early for possible overrun. */
4037 if (!scsi_sg_count(scmd
) || scsi_sglist(scmd
)->length
< len
)
4038 goto invalid_param_len
;
4040 p
= page_address(sg_page(scsi_sglist(scmd
)));
4042 /* Move past header and block descriptors. */
4044 goto invalid_param_len
;
4049 bd_len
= (p
[6] << 8) + p
[7];
4054 goto invalid_param_len
;
4055 if (bd_len
!= 0 && bd_len
!= 8) {
4056 fp
= (six_byte
) ? 3 : 6;
4057 fp
+= bd_len
+ hdr_len
;
4066 /* Parse both possible formats for the mode page headers. */
4070 goto invalid_param_len
;
4073 pg_len
= (p
[2] << 8) | p
[3];
4078 goto invalid_param_len
;
4087 * No mode subpages supported (yet) but asking for _all_
4088 * subpages may be valid
4090 if (spg
&& (spg
!= ALL_SUB_MPAGES
)) {
4091 fp
= (p
[0] & 0x40) ? 1 : 0;
4092 fp
+= hdr_len
+ bd_len
;
4096 goto invalid_param_len
;
4100 if (ata_mselect_caching(qc
, p
, pg_len
, &fp
) < 0) {
4101 fp
+= hdr_len
+ bd_len
;
4106 if (ata_mselect_control(qc
, p
, pg_len
, &fp
) < 0) {
4107 fp
+= hdr_len
+ bd_len
;
4110 goto skip
; /* No ATA command to send */
4113 default: /* invalid page code */
4114 fp
= bd_len
+ hdr_len
;
4119 * Only one page has changeable data, so we only support setting one
4128 ata_scsi_set_invalid_field(qc
->dev
, scmd
, fp
, bp
);
4132 ata_scsi_set_invalid_parameter(qc
->dev
, scmd
, fp
);
4136 /* "Parameter list length error" */
4137 ata_scsi_set_sense(qc
->dev
, scmd
, ILLEGAL_REQUEST
, 0x1a, 0x0);
4141 scmd
->result
= SAM_STAT_GOOD
;
4145 static u8
ata_scsi_trusted_op(u32 len
, bool send
, bool dma
)
4148 return ATA_CMD_TRUSTED_NONDATA
;
4150 return dma
? ATA_CMD_TRUSTED_SND_DMA
: ATA_CMD_TRUSTED_SND
;
4152 return dma
? ATA_CMD_TRUSTED_RCV_DMA
: ATA_CMD_TRUSTED_RCV
;
4155 static unsigned int ata_scsi_security_inout_xlat(struct ata_queued_cmd
*qc
)
4157 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
4158 const u8
*cdb
= scmd
->cmnd
;
4159 struct ata_taskfile
*tf
= &qc
->tf
;
4161 bool send
= (cdb
[0] == SECURITY_PROTOCOL_OUT
);
4162 u16 spsp
= get_unaligned_be16(&cdb
[2]);
4163 u32 len
= get_unaligned_be32(&cdb
[6]);
4164 bool dma
= !(qc
->dev
->flags
& ATA_DFLAG_PIO
);
4167 * We don't support the ATA "security" protocol.
4170 ata_scsi_set_invalid_field(qc
->dev
, scmd
, 1, 0);
4174 if (cdb
[4] & 7) { /* INC_512 */
4176 ata_scsi_set_invalid_field(qc
->dev
, scmd
, 6, 0);
4180 if (len
> 0x01fffe00) {
4181 ata_scsi_set_invalid_field(qc
->dev
, scmd
, 6, 0);
4185 /* convert to the sector-based ATA addressing */
4186 len
= (len
+ 511) / 512;
4189 tf
->protocol
= dma
? ATA_PROT_DMA
: ATA_PROT_PIO
;
4190 tf
->flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
| ATA_TFLAG_LBA
;
4192 tf
->flags
|= ATA_TFLAG_WRITE
;
4193 tf
->command
= ata_scsi_trusted_op(len
, send
, dma
);
4195 tf
->lbam
= spsp
& 0xff;
4196 tf
->lbah
= spsp
>> 8;
4199 tf
->nsect
= len
& 0xff;
4200 tf
->lbal
= len
>> 8;
4203 tf
->lbah
= (1 << 7);
4206 ata_qc_set_pc_nbytes(qc
);
4211 * ata_scsi_var_len_cdb_xlat - SATL variable length CDB to Handler
4212 * @qc: Command to be translated
4214 * Translate a SCSI variable length CDB to specified commands.
4215 * It checks a service action value in CDB to call corresponding handler.
4218 * Zero on success, non-zero on failure
4221 static unsigned int ata_scsi_var_len_cdb_xlat(struct ata_queued_cmd
*qc
)
4223 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
4224 const u8
*cdb
= scmd
->cmnd
;
4225 const u16 sa
= get_unaligned_be16(&cdb
[8]);
4228 * if service action represents a ata pass-thru(32) command,
4229 * then pass it to ata_scsi_pass_thru handler.
4232 return ata_scsi_pass_thru(qc
);
4234 /* unsupported service action */
4239 * ata_get_xlat_func - check if SCSI to ATA translation is possible
4241 * @cmd: SCSI command opcode to consider
4243 * Look up the SCSI command given, and determine whether the
4244 * SCSI command is to be translated or simulated.
4247 * Pointer to translation function if possible, %NULL if not.
4250 static inline ata_xlat_func_t
ata_get_xlat_func(struct ata_device
*dev
, u8 cmd
)
4260 return ata_scsi_rw_xlat
;
4263 return ata_scsi_write_same_xlat
;
4265 case SYNCHRONIZE_CACHE
:
4266 if (ata_try_flush_cache(dev
))
4267 return ata_scsi_flush_xlat
;
4272 return ata_scsi_verify_xlat
;
4276 return ata_scsi_pass_thru
;
4278 case VARIABLE_LENGTH_CMD
:
4279 return ata_scsi_var_len_cdb_xlat
;
4282 case MODE_SELECT_10
:
4283 return ata_scsi_mode_select_xlat
;
4287 return ata_scsi_zbc_in_xlat
;
4290 return ata_scsi_zbc_out_xlat
;
4292 case SECURITY_PROTOCOL_IN
:
4293 case SECURITY_PROTOCOL_OUT
:
4294 if (!(dev
->flags
& ATA_DFLAG_TRUSTED
))
4296 return ata_scsi_security_inout_xlat
;
4299 return ata_scsi_start_stop_xlat
;
4306 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
4307 * @ap: ATA port to which the command was being sent
4308 * @cmd: SCSI command to dump
4310 * Prints the contents of a SCSI command via printk().
4313 static inline void ata_scsi_dump_cdb(struct ata_port
*ap
,
4314 struct scsi_cmnd
*cmd
)
4317 struct scsi_device
*scsidev
= cmd
->device
;
4319 DPRINTK("CDB (%u:%d,%d,%lld) %9ph\n",
4321 scsidev
->channel
, scsidev
->id
, scsidev
->lun
,
4326 static inline int __ata_scsi_queuecmd(struct scsi_cmnd
*scmd
,
4327 struct ata_device
*dev
)
4329 u8 scsi_op
= scmd
->cmnd
[0];
4330 ata_xlat_func_t xlat_func
;
4333 if (dev
->class == ATA_DEV_ATA
|| dev
->class == ATA_DEV_ZAC
) {
4334 if (unlikely(!scmd
->cmd_len
|| scmd
->cmd_len
> dev
->cdb_len
))
4337 xlat_func
= ata_get_xlat_func(dev
, scsi_op
);
4339 if (unlikely(!scmd
->cmd_len
))
4343 if (likely((scsi_op
!= ATA_16
) || !atapi_passthru16
)) {
4344 /* relay SCSI command to ATAPI device */
4345 int len
= COMMAND_SIZE(scsi_op
);
4346 if (unlikely(len
> scmd
->cmd_len
||
4347 len
> dev
->cdb_len
||
4348 scmd
->cmd_len
> ATAPI_CDB_LEN
))
4351 xlat_func
= atapi_xlat
;
4353 /* ATA_16 passthru, treat as an ATA command */
4354 if (unlikely(scmd
->cmd_len
> 16))
4357 xlat_func
= ata_get_xlat_func(dev
, scsi_op
);
4362 rc
= ata_scsi_translate(dev
, scmd
, xlat_func
);
4364 ata_scsi_simulate(dev
, scmd
);
4369 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
4370 scmd
->cmd_len
, scsi_op
, dev
->cdb_len
);
4371 scmd
->result
= DID_ERROR
<< 16;
4372 scmd
->scsi_done(scmd
);
4377 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
4378 * @shost: SCSI host of command to be sent
4379 * @cmd: SCSI command to be sent
4381 * In some cases, this function translates SCSI commands into
4382 * ATA taskfiles, and queues the taskfiles to be sent to
4383 * hardware. In other cases, this function simulates a
4384 * SCSI device by evaluating and responding to certain
4385 * SCSI commands. This creates the overall effect of
4386 * ATA and ATAPI devices appearing as SCSI devices.
4392 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
4395 int ata_scsi_queuecmd(struct Scsi_Host
*shost
, struct scsi_cmnd
*cmd
)
4397 struct ata_port
*ap
;
4398 struct ata_device
*dev
;
4399 struct scsi_device
*scsidev
= cmd
->device
;
4401 unsigned long irq_flags
;
4403 ap
= ata_shost_to_port(shost
);
4405 spin_lock_irqsave(ap
->lock
, irq_flags
);
4407 ata_scsi_dump_cdb(ap
, cmd
);
4409 dev
= ata_scsi_find_dev(ap
, scsidev
);
4411 rc
= __ata_scsi_queuecmd(cmd
, dev
);
4413 cmd
->result
= (DID_BAD_TARGET
<< 16);
4414 cmd
->scsi_done(cmd
);
4417 spin_unlock_irqrestore(ap
->lock
, irq_flags
);
4423 * ata_scsi_simulate - simulate SCSI command on ATA device
4424 * @dev: the target device
4425 * @cmd: SCSI command being sent to device.
4427 * Interprets and directly executes a select list of SCSI commands
4428 * that can be handled internally.
4431 * spin_lock_irqsave(host lock)
4434 void ata_scsi_simulate(struct ata_device
*dev
, struct scsi_cmnd
*cmd
)
4436 struct ata_scsi_args args
;
4437 const u8
*scsicmd
= cmd
->cmnd
;
4444 switch(scsicmd
[0]) {
4446 if (scsicmd
[1] & 2) /* is CmdDt set? */
4447 ata_scsi_set_invalid_field(dev
, cmd
, 1, 0xff);
4448 else if ((scsicmd
[1] & 1) == 0) /* is EVPD clear? */
4449 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_std
);
4450 else switch (scsicmd
[2]) {
4452 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_00
);
4455 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_80
);
4458 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_83
);
4461 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_89
);
4464 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_b0
);
4467 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_b1
);
4470 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_b2
);
4473 if (dev
->flags
& ATA_DFLAG_ZAC
) {
4474 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_b6
);
4479 ata_scsi_set_invalid_field(dev
, cmd
, 2, 0xff);
4486 ata_scsi_rbuf_fill(&args
, ata_scsiop_mode_sense
);
4490 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
4493 case SERVICE_ACTION_IN_16
:
4494 if ((scsicmd
[1] & 0x1f) == SAI_READ_CAPACITY_16
)
4495 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
4497 ata_scsi_set_invalid_field(dev
, cmd
, 1, 0xff);
4501 ata_scsi_rbuf_fill(&args
, ata_scsiop_report_luns
);
4505 ata_scsi_set_sense(dev
, cmd
, 0, 0, 0);
4506 cmd
->result
= (DRIVER_SENSE
<< 24);
4509 /* if we reach this, then writeback caching is disabled,
4510 * turning this into a no-op.
4512 case SYNCHRONIZE_CACHE
:
4515 /* no-op's, complete with success */
4519 case TEST_UNIT_READY
:
4522 case SEND_DIAGNOSTIC
:
4523 tmp8
= scsicmd
[1] & ~(1 << 3);
4524 if (tmp8
!= 0x4 || scsicmd
[3] || scsicmd
[4])
4525 ata_scsi_set_invalid_field(dev
, cmd
, 1, 0xff);
4528 case MAINTENANCE_IN
:
4529 if (scsicmd
[1] == MI_REPORT_SUPPORTED_OPERATION_CODES
)
4530 ata_scsi_rbuf_fill(&args
, ata_scsiop_maint_in
);
4532 ata_scsi_set_invalid_field(dev
, cmd
, 1, 0xff);
4535 /* all other commands */
4537 ata_scsi_set_sense(dev
, cmd
, ILLEGAL_REQUEST
, 0x20, 0x0);
4538 /* "Invalid command operation code" */
4542 cmd
->scsi_done(cmd
);
4545 int ata_scsi_add_hosts(struct ata_host
*host
, struct scsi_host_template
*sht
)
4549 for (i
= 0; i
< host
->n_ports
; i
++) {
4550 struct ata_port
*ap
= host
->ports
[i
];
4551 struct Scsi_Host
*shost
;
4554 shost
= scsi_host_alloc(sht
, sizeof(struct ata_port
*));
4558 shost
->eh_noresume
= 1;
4559 *(struct ata_port
**)&shost
->hostdata
[0] = ap
;
4560 ap
->scsi_host
= shost
;
4562 shost
->transportt
= ata_scsi_transport_template
;
4563 shost
->unique_id
= ap
->print_id
;
4566 shost
->max_channel
= 1;
4567 shost
->max_cmd_len
= 32;
4569 /* Schedule policy is determined by ->qc_defer()
4570 * callback and it needs to see every deferred qc.
4571 * Set host_blocked to 1 to prevent SCSI midlayer from
4572 * automatically deferring requests.
4574 shost
->max_host_blocked
= 1;
4576 rc
= scsi_add_host_with_dma(ap
->scsi_host
,
4577 &ap
->tdev
, ap
->host
->dev
);
4585 scsi_host_put(host
->ports
[i
]->scsi_host
);
4588 struct Scsi_Host
*shost
= host
->ports
[i
]->scsi_host
;
4590 scsi_remove_host(shost
);
4591 scsi_host_put(shost
);
4596 void ata_scsi_scan_host(struct ata_port
*ap
, int sync
)
4599 struct ata_device
*last_failed_dev
= NULL
;
4600 struct ata_link
*link
;
4601 struct ata_device
*dev
;
4604 ata_for_each_link(link
, ap
, EDGE
) {
4605 ata_for_each_dev(dev
, link
, ENABLED
) {
4606 struct scsi_device
*sdev
;
4607 int channel
= 0, id
= 0;
4612 if (ata_is_host_link(link
))
4615 channel
= link
->pmp
;
4617 sdev
= __scsi_add_device(ap
->scsi_host
, channel
, id
, 0,
4619 if (!IS_ERR(sdev
)) {
4621 scsi_device_put(sdev
);
4628 /* If we scanned while EH was in progress or allocation
4629 * failure occurred, scan would have failed silently. Check
4630 * whether all devices are attached.
4632 ata_for_each_link(link
, ap
, EDGE
) {
4633 ata_for_each_dev(dev
, link
, ENABLED
) {
4642 /* we're missing some SCSI devices */
4644 /* If caller requested synchrnous scan && we've made
4645 * any progress, sleep briefly and repeat.
4647 if (dev
!= last_failed_dev
) {
4649 last_failed_dev
= dev
;
4653 /* We might be failing to detect boot device, give it
4654 * a few more chances.
4662 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n");
4665 queue_delayed_work(system_long_wq
, &ap
->hotplug_task
,
4666 round_jiffies_relative(HZ
));
4670 * ata_scsi_offline_dev - offline attached SCSI device
4671 * @dev: ATA device to offline attached SCSI device for
4673 * This function is called from ata_eh_hotplug() and responsible
4674 * for taking the SCSI device attached to @dev offline. This
4675 * function is called with host lock which protects dev->sdev
4679 * spin_lock_irqsave(host lock)
4682 * 1 if attached SCSI device exists, 0 otherwise.
4684 int ata_scsi_offline_dev(struct ata_device
*dev
)
4687 scsi_device_set_state(dev
->sdev
, SDEV_OFFLINE
);
4694 * ata_scsi_remove_dev - remove attached SCSI device
4695 * @dev: ATA device to remove attached SCSI device for
4697 * This function is called from ata_eh_scsi_hotplug() and
4698 * responsible for removing the SCSI device attached to @dev.
4701 * Kernel thread context (may sleep).
4703 static void ata_scsi_remove_dev(struct ata_device
*dev
)
4705 struct ata_port
*ap
= dev
->link
->ap
;
4706 struct scsi_device
*sdev
;
4707 unsigned long flags
;
4709 /* Alas, we need to grab scan_mutex to ensure SCSI device
4710 * state doesn't change underneath us and thus
4711 * scsi_device_get() always succeeds. The mutex locking can
4712 * be removed if there is __scsi_device_get() interface which
4713 * increments reference counts regardless of device state.
4715 mutex_lock(&ap
->scsi_host
->scan_mutex
);
4716 spin_lock_irqsave(ap
->lock
, flags
);
4718 /* clearing dev->sdev is protected by host lock */
4723 /* If user initiated unplug races with us, sdev can go
4724 * away underneath us after the host lock and
4725 * scan_mutex are released. Hold onto it.
4727 if (scsi_device_get(sdev
) == 0) {
4728 /* The following ensures the attached sdev is
4729 * offline on return from ata_scsi_offline_dev()
4730 * regardless it wins or loses the race
4731 * against this function.
4733 scsi_device_set_state(sdev
, SDEV_OFFLINE
);
4740 spin_unlock_irqrestore(ap
->lock
, flags
);
4741 mutex_unlock(&ap
->scsi_host
->scan_mutex
);
4744 ata_dev_info(dev
, "detaching (SCSI %s)\n",
4745 dev_name(&sdev
->sdev_gendev
));
4747 scsi_remove_device(sdev
);
4748 scsi_device_put(sdev
);
4752 static void ata_scsi_handle_link_detach(struct ata_link
*link
)
4754 struct ata_port
*ap
= link
->ap
;
4755 struct ata_device
*dev
;
4757 ata_for_each_dev(dev
, link
, ALL
) {
4758 unsigned long flags
;
4760 if (!(dev
->flags
& ATA_DFLAG_DETACHED
))
4763 spin_lock_irqsave(ap
->lock
, flags
);
4764 dev
->flags
&= ~ATA_DFLAG_DETACHED
;
4765 spin_unlock_irqrestore(ap
->lock
, flags
);
4767 if (zpodd_dev_enabled(dev
))
4770 ata_scsi_remove_dev(dev
);
4775 * ata_scsi_media_change_notify - send media change event
4776 * @dev: Pointer to the disk device with media change event
4778 * Tell the block layer to send a media change notification
4782 * spin_lock_irqsave(host lock)
4784 void ata_scsi_media_change_notify(struct ata_device
*dev
)
4787 sdev_evt_send_simple(dev
->sdev
, SDEV_EVT_MEDIA_CHANGE
,
4792 * ata_scsi_hotplug - SCSI part of hotplug
4793 * @work: Pointer to ATA port to perform SCSI hotplug on
4795 * Perform SCSI part of hotplug. It's executed from a separate
4796 * workqueue after EH completes. This is necessary because SCSI
4797 * hot plugging requires working EH and hot unplugging is
4798 * synchronized with hot plugging with a mutex.
4801 * Kernel thread context (may sleep).
4803 void ata_scsi_hotplug(struct work_struct
*work
)
4805 struct ata_port
*ap
=
4806 container_of(work
, struct ata_port
, hotplug_task
.work
);
4809 if (ap
->pflags
& ATA_PFLAG_UNLOADING
) {
4810 DPRINTK("ENTER/EXIT - unloading\n");
4817 * The block layer suspend/resume path is fundamentally broken due
4818 * to freezable kthreads and workqueue and may deadlock if a block
4819 * device gets removed while resume is in progress. I don't know
4820 * what the solution is short of removing freezable kthreads and
4821 * workqueues altogether.
4823 * The following is an ugly hack to avoid kicking off device
4824 * removal while freezer is active. This is a joke but does avoid
4825 * this particular deadlock scenario.
4827 * https://bugzilla.kernel.org/show_bug.cgi?id=62801
4828 * http://marc.info/?l=linux-kernel&m=138695698516487
4830 #ifdef CONFIG_FREEZER
4836 mutex_lock(&ap
->scsi_scan_mutex
);
4838 /* Unplug detached devices. We cannot use link iterator here
4839 * because PMP links have to be scanned even if PMP is
4840 * currently not attached. Iterate manually.
4842 ata_scsi_handle_link_detach(&ap
->link
);
4844 for (i
= 0; i
< SATA_PMP_MAX_PORTS
; i
++)
4845 ata_scsi_handle_link_detach(&ap
->pmp_link
[i
]);
4847 /* scan for new ones */
4848 ata_scsi_scan_host(ap
, 0);
4850 mutex_unlock(&ap
->scsi_scan_mutex
);
4855 * ata_scsi_user_scan - indication for user-initiated bus scan
4856 * @shost: SCSI host to scan
4857 * @channel: Channel to scan
4861 * This function is called when user explicitly requests bus
4862 * scan. Set probe pending flag and invoke EH.
4865 * SCSI layer (we don't care)
4870 int ata_scsi_user_scan(struct Scsi_Host
*shost
, unsigned int channel
,
4871 unsigned int id
, u64 lun
)
4873 struct ata_port
*ap
= ata_shost_to_port(shost
);
4874 unsigned long flags
;
4877 if (!ap
->ops
->error_handler
)
4880 if (lun
!= SCAN_WILD_CARD
&& lun
)
4883 if (!sata_pmp_attached(ap
)) {
4884 if (channel
!= SCAN_WILD_CARD
&& channel
)
4888 if (id
!= SCAN_WILD_CARD
&& id
)
4893 spin_lock_irqsave(ap
->lock
, flags
);
4895 if (devno
== SCAN_WILD_CARD
) {
4896 struct ata_link
*link
;
4898 ata_for_each_link(link
, ap
, EDGE
) {
4899 struct ata_eh_info
*ehi
= &link
->eh_info
;
4900 ehi
->probe_mask
|= ATA_ALL_DEVICES
;
4901 ehi
->action
|= ATA_EH_RESET
;
4904 struct ata_device
*dev
= ata_find_dev(ap
, devno
);
4907 struct ata_eh_info
*ehi
= &dev
->link
->eh_info
;
4908 ehi
->probe_mask
|= 1 << dev
->devno
;
4909 ehi
->action
|= ATA_EH_RESET
;
4915 ata_port_schedule_eh(ap
);
4916 spin_unlock_irqrestore(ap
->lock
, flags
);
4917 ata_port_wait_eh(ap
);
4919 spin_unlock_irqrestore(ap
->lock
, flags
);
4925 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
4926 * @work: Pointer to ATA port to perform scsi_rescan_device()
4928 * After ATA pass thru (SAT) commands are executed successfully,
4929 * libata need to propagate the changes to SCSI layer.
4932 * Kernel thread context (may sleep).
4934 void ata_scsi_dev_rescan(struct work_struct
*work
)
4936 struct ata_port
*ap
=
4937 container_of(work
, struct ata_port
, scsi_rescan_task
);
4938 struct ata_link
*link
;
4939 struct ata_device
*dev
;
4940 unsigned long flags
;
4942 mutex_lock(&ap
->scsi_scan_mutex
);
4943 spin_lock_irqsave(ap
->lock
, flags
);
4945 ata_for_each_link(link
, ap
, EDGE
) {
4946 ata_for_each_dev(dev
, link
, ENABLED
) {
4947 struct scsi_device
*sdev
= dev
->sdev
;
4951 if (scsi_device_get(sdev
))
4954 spin_unlock_irqrestore(ap
->lock
, flags
);
4955 scsi_rescan_device(&(sdev
->sdev_gendev
));
4956 scsi_device_put(sdev
);
4957 spin_lock_irqsave(ap
->lock
, flags
);
4961 spin_unlock_irqrestore(ap
->lock
, flags
);
4962 mutex_unlock(&ap
->scsi_scan_mutex
);
4966 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
4967 * @host: ATA host container for all SAS ports
4968 * @port_info: Information from low-level host driver
4969 * @shost: SCSI host that the scsi device is attached to
4972 * PCI/etc. bus probe sem.
4975 * ata_port pointer on success / NULL on failure.
4978 struct ata_port
*ata_sas_port_alloc(struct ata_host
*host
,
4979 struct ata_port_info
*port_info
,
4980 struct Scsi_Host
*shost
)
4982 struct ata_port
*ap
;
4984 ap
= ata_port_alloc(host
);
4989 ap
->lock
= &host
->lock
;
4990 ap
->pio_mask
= port_info
->pio_mask
;
4991 ap
->mwdma_mask
= port_info
->mwdma_mask
;
4992 ap
->udma_mask
= port_info
->udma_mask
;
4993 ap
->flags
|= port_info
->flags
;
4994 ap
->ops
= port_info
->port_ops
;
4995 ap
->cbl
= ATA_CBL_SATA
;
4999 EXPORT_SYMBOL_GPL(ata_sas_port_alloc
);
5002 * ata_sas_port_start - Set port up for dma.
5003 * @ap: Port to initialize
5005 * Called just after data structures for each port are
5008 * May be used as the port_start() entry in ata_port_operations.
5011 * Inherited from caller.
5013 int ata_sas_port_start(struct ata_port
*ap
)
5016 * the port is marked as frozen at allocation time, but if we don't
5017 * have new eh, we won't thaw it
5019 if (!ap
->ops
->error_handler
)
5020 ap
->pflags
&= ~ATA_PFLAG_FROZEN
;
5023 EXPORT_SYMBOL_GPL(ata_sas_port_start
);
5026 * ata_port_stop - Undo ata_sas_port_start()
5027 * @ap: Port to shut down
5029 * May be used as the port_stop() entry in ata_port_operations.
5032 * Inherited from caller.
5035 void ata_sas_port_stop(struct ata_port
*ap
)
5038 EXPORT_SYMBOL_GPL(ata_sas_port_stop
);
5041 * ata_sas_async_probe - simply schedule probing and return
5042 * @ap: Port to probe
5044 * For batch scheduling of probe for sas attached ata devices, assumes
5045 * the port has already been through ata_sas_port_init()
5047 void ata_sas_async_probe(struct ata_port
*ap
)
5049 __ata_port_probe(ap
);
5051 EXPORT_SYMBOL_GPL(ata_sas_async_probe
);
5053 int ata_sas_sync_probe(struct ata_port
*ap
)
5055 return ata_port_probe(ap
);
5057 EXPORT_SYMBOL_GPL(ata_sas_sync_probe
);
5061 * ata_sas_port_init - Initialize a SATA device
5062 * @ap: SATA port to initialize
5065 * PCI/etc. bus probe sem.
5068 * Zero on success, non-zero on error.
5071 int ata_sas_port_init(struct ata_port
*ap
)
5073 int rc
= ap
->ops
->port_start(ap
);
5077 ap
->print_id
= atomic_inc_return(&ata_print_id
);
5080 EXPORT_SYMBOL_GPL(ata_sas_port_init
);
5083 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
5084 * @ap: SATA port to destroy
5088 void ata_sas_port_destroy(struct ata_port
*ap
)
5090 if (ap
->ops
->port_stop
)
5091 ap
->ops
->port_stop(ap
);
5094 EXPORT_SYMBOL_GPL(ata_sas_port_destroy
);
5097 * ata_sas_slave_configure - Default slave_config routine for libata devices
5098 * @sdev: SCSI device to configure
5099 * @ap: ATA port to which SCSI device is attached
5105 int ata_sas_slave_configure(struct scsi_device
*sdev
, struct ata_port
*ap
)
5107 ata_scsi_sdev_config(sdev
);
5108 ata_scsi_dev_config(sdev
, ap
->link
.device
);
5111 EXPORT_SYMBOL_GPL(ata_sas_slave_configure
);
5114 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
5115 * @cmd: SCSI command to be sent
5116 * @ap: ATA port to which the command is being sent
5119 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
5123 int ata_sas_queuecmd(struct scsi_cmnd
*cmd
, struct ata_port
*ap
)
5127 ata_scsi_dump_cdb(ap
, cmd
);
5129 if (likely(ata_dev_enabled(ap
->link
.device
)))
5130 rc
= __ata_scsi_queuecmd(cmd
, ap
->link
.device
);
5132 cmd
->result
= (DID_BAD_TARGET
<< 16);
5133 cmd
->scsi_done(cmd
);
5137 EXPORT_SYMBOL_GPL(ata_sas_queuecmd
);
5139 int ata_sas_allocate_tag(struct ata_port
*ap
)
5141 unsigned int max_queue
= ap
->host
->n_tags
;
5142 unsigned int i
, tag
;
5144 for (i
= 0, tag
= ap
->sas_last_tag
+ 1; i
< max_queue
; i
++, tag
++) {
5145 tag
= tag
< max_queue
? tag
: 0;
5147 /* the last tag is reserved for internal command. */
5148 if (tag
== ATA_TAG_INTERNAL
)
5151 if (!test_and_set_bit(tag
, &ap
->sas_tag_allocated
)) {
5152 ap
->sas_last_tag
= tag
;
5159 void ata_sas_free_tag(unsigned int tag
, struct ata_port
*ap
)
5161 clear_bit(tag
, &ap
->sas_tag_allocated
);