2 * libata-scsi.c - helper library for ATA
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
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/DocBook/libata.*
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 <scsi/scsi.h>
41 #include <scsi/scsi_host.h>
42 #include <scsi/scsi_cmnd.h>
43 #include <scsi/scsi_eh.h>
44 #include <scsi/scsi_device.h>
45 #include <scsi/scsi_tcq.h>
46 #include <scsi/scsi_transport.h>
47 #include <linux/libata.h>
48 #include <linux/hdreg.h>
49 #include <linux/uaccess.h>
50 #include <linux/suspend.h>
51 #include <asm/unaligned.h>
55 #define SECTOR_SIZE 512
56 #define ATA_SCSI_RBUF_SIZE 4096
58 static DEFINE_SPINLOCK(ata_scsi_rbuf_lock
);
59 static u8 ata_scsi_rbuf
[ATA_SCSI_RBUF_SIZE
];
61 typedef unsigned int (*ata_xlat_func_t
)(struct ata_queued_cmd
*qc
);
63 static struct ata_device
*__ata_scsi_find_dev(struct ata_port
*ap
,
64 const struct scsi_device
*scsidev
);
65 static struct ata_device
*ata_scsi_find_dev(struct ata_port
*ap
,
66 const struct scsi_device
*scsidev
);
67 static int ata_scsi_user_scan(struct Scsi_Host
*shost
, unsigned int channel
,
68 unsigned int id
, unsigned int lun
);
71 #define RW_RECOVERY_MPAGE 0x1
72 #define RW_RECOVERY_MPAGE_LEN 12
73 #define CACHE_MPAGE 0x8
74 #define CACHE_MPAGE_LEN 20
75 #define CONTROL_MPAGE 0xa
76 #define CONTROL_MPAGE_LEN 12
77 #define ALL_MPAGES 0x3f
78 #define ALL_SUB_MPAGES 0xff
81 static const u8 def_rw_recovery_mpage
[RW_RECOVERY_MPAGE_LEN
] = {
83 RW_RECOVERY_MPAGE_LEN
- 2,
85 0, /* read retry count */
87 0, /* write retry count */
91 static const u8 def_cache_mpage
[CACHE_MPAGE_LEN
] = {
94 0, /* contains WCE, needs to be 0 for logic */
95 0, 0, 0, 0, 0, 0, 0, 0, 0,
96 0, /* contains DRA, needs to be 0 for logic */
100 static const u8 def_control_mpage
[CONTROL_MPAGE_LEN
] = {
102 CONTROL_MPAGE_LEN
- 2,
103 2, /* DSENSE=0, GLTSD=1 */
104 0, /* [QAM+QERR may be 1, see 05-359r1] */
105 0, 0, 0, 0, 0xff, 0xff,
106 0, 30 /* extended self test time, see 05-359r1 */
110 * libata transport template. libata doesn't do real transport stuff.
111 * It just needs the eh_timed_out hook.
113 static struct scsi_transport_template ata_scsi_transport_template
= {
114 .eh_strategy_handler
= ata_scsi_error
,
115 .eh_timed_out
= ata_scsi_timed_out
,
116 .user_scan
= ata_scsi_user_scan
,
120 static const struct {
123 } link_pm_policy
[] = {
124 { NOT_AVAILABLE
, "max_performance" },
125 { MIN_POWER
, "min_power" },
126 { MAX_PERFORMANCE
, "max_performance" },
127 { MEDIUM_POWER
, "medium_power" },
130 static const char *ata_scsi_lpm_get(enum link_pm policy
)
134 for (i
= 0; i
< ARRAY_SIZE(link_pm_policy
); i
++)
135 if (link_pm_policy
[i
].value
== policy
)
136 return link_pm_policy
[i
].name
;
141 static ssize_t
ata_scsi_lpm_put(struct device
*dev
,
142 struct device_attribute
*attr
,
143 const char *buf
, size_t count
)
145 struct Scsi_Host
*shost
= class_to_shost(dev
);
146 struct ata_port
*ap
= ata_shost_to_port(shost
);
147 enum link_pm policy
= 0;
151 * we are skipping array location 0 on purpose - this
152 * is because a value of NOT_AVAILABLE is displayed
153 * to the user as max_performance, but when the user
154 * writes "max_performance", they actually want the
155 * value to match MAX_PERFORMANCE.
157 for (i
= 1; i
< ARRAY_SIZE(link_pm_policy
); i
++) {
158 const int len
= strlen(link_pm_policy
[i
].name
);
159 if (strncmp(link_pm_policy
[i
].name
, buf
, len
) == 0) {
160 policy
= link_pm_policy
[i
].value
;
167 ata_lpm_schedule(ap
, policy
);
172 ata_scsi_lpm_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
174 struct Scsi_Host
*shost
= class_to_shost(dev
);
175 struct ata_port
*ap
= ata_shost_to_port(shost
);
177 ata_scsi_lpm_get(ap
->pm_policy
);
182 return snprintf(buf
, 23, "%s\n", policy
);
184 DEVICE_ATTR(link_power_management_policy
, S_IRUGO
| S_IWUSR
,
185 ata_scsi_lpm_show
, ata_scsi_lpm_put
);
186 EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy
);
188 static ssize_t
ata_scsi_park_show(struct device
*device
,
189 struct device_attribute
*attr
, char *buf
)
191 struct scsi_device
*sdev
= to_scsi_device(device
);
193 struct ata_link
*link
;
194 struct ata_device
*dev
;
195 unsigned long flags
, now
;
196 unsigned int uninitialized_var(msecs
);
199 ap
= ata_shost_to_port(sdev
->host
);
201 spin_lock_irqsave(ap
->lock
, flags
);
202 dev
= ata_scsi_find_dev(ap
, sdev
);
207 if (dev
->flags
& ATA_DFLAG_NO_UNLOAD
) {
214 if (ap
->pflags
& ATA_PFLAG_EH_IN_PROGRESS
&&
215 link
->eh_context
.unloaded_mask
& (1 << dev
->devno
) &&
216 time_after(dev
->unpark_deadline
, now
))
217 msecs
= jiffies_to_msecs(dev
->unpark_deadline
- now
);
222 spin_unlock_irq(ap
->lock
);
224 return rc
? rc
: snprintf(buf
, 20, "%u\n", msecs
);
227 static ssize_t
ata_scsi_park_store(struct device
*device
,
228 struct device_attribute
*attr
,
229 const char *buf
, size_t len
)
231 struct scsi_device
*sdev
= to_scsi_device(device
);
233 struct ata_device
*dev
;
238 rc
= strict_strtol(buf
, 10, &input
);
239 if (rc
|| input
< -2)
241 if (input
> ATA_TMOUT_MAX_PARK
) {
243 input
= ATA_TMOUT_MAX_PARK
;
246 ap
= ata_shost_to_port(sdev
->host
);
248 spin_lock_irqsave(ap
->lock
, flags
);
249 dev
= ata_scsi_find_dev(ap
, sdev
);
250 if (unlikely(!dev
)) {
254 if (dev
->class != ATA_DEV_ATA
) {
260 if (dev
->flags
& ATA_DFLAG_NO_UNLOAD
) {
265 dev
->unpark_deadline
= ata_deadline(jiffies
, input
);
266 dev
->link
->eh_info
.dev_action
[dev
->devno
] |= ATA_EH_PARK
;
267 ata_port_schedule_eh(ap
);
268 complete(&ap
->park_req_pending
);
272 dev
->flags
&= ~ATA_DFLAG_NO_UNLOAD
;
275 dev
->flags
|= ATA_DFLAG_NO_UNLOAD
;
280 spin_unlock_irqrestore(ap
->lock
, flags
);
282 return rc
? rc
: len
;
284 DEVICE_ATTR(unload_heads
, S_IRUGO
| S_IWUSR
,
285 ata_scsi_park_show
, ata_scsi_park_store
);
286 EXPORT_SYMBOL_GPL(dev_attr_unload_heads
);
288 static void ata_scsi_set_sense(struct scsi_cmnd
*cmd
, u8 sk
, u8 asc
, u8 ascq
)
290 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
292 scsi_build_sense_buffer(0, cmd
->sense_buffer
, sk
, asc
, ascq
);
296 ata_scsi_em_message_store(struct device
*dev
, struct device_attribute
*attr
,
297 const char *buf
, size_t count
)
299 struct Scsi_Host
*shost
= class_to_shost(dev
);
300 struct ata_port
*ap
= ata_shost_to_port(shost
);
301 if (ap
->ops
->em_store
&& (ap
->flags
& ATA_FLAG_EM
))
302 return ap
->ops
->em_store(ap
, buf
, count
);
307 ata_scsi_em_message_show(struct device
*dev
, struct device_attribute
*attr
,
310 struct Scsi_Host
*shost
= class_to_shost(dev
);
311 struct ata_port
*ap
= ata_shost_to_port(shost
);
313 if (ap
->ops
->em_show
&& (ap
->flags
& ATA_FLAG_EM
))
314 return ap
->ops
->em_show(ap
, buf
);
317 DEVICE_ATTR(em_message
, S_IRUGO
| S_IWUSR
,
318 ata_scsi_em_message_show
, ata_scsi_em_message_store
);
319 EXPORT_SYMBOL_GPL(dev_attr_em_message
);
322 ata_scsi_em_message_type_show(struct device
*dev
, struct device_attribute
*attr
,
325 struct Scsi_Host
*shost
= class_to_shost(dev
);
326 struct ata_port
*ap
= ata_shost_to_port(shost
);
328 return snprintf(buf
, 23, "%d\n", ap
->em_message_type
);
330 DEVICE_ATTR(em_message_type
, S_IRUGO
,
331 ata_scsi_em_message_type_show
, NULL
);
332 EXPORT_SYMBOL_GPL(dev_attr_em_message_type
);
335 ata_scsi_activity_show(struct device
*dev
, struct device_attribute
*attr
,
338 struct scsi_device
*sdev
= to_scsi_device(dev
);
339 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
340 struct ata_device
*atadev
= ata_scsi_find_dev(ap
, sdev
);
342 if (ap
->ops
->sw_activity_show
&& (ap
->flags
& ATA_FLAG_SW_ACTIVITY
))
343 return ap
->ops
->sw_activity_show(atadev
, buf
);
348 ata_scsi_activity_store(struct device
*dev
, struct device_attribute
*attr
,
349 const char *buf
, size_t count
)
351 struct scsi_device
*sdev
= to_scsi_device(dev
);
352 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
353 struct ata_device
*atadev
= ata_scsi_find_dev(ap
, sdev
);
354 enum sw_activity val
;
357 if (ap
->ops
->sw_activity_store
&& (ap
->flags
& ATA_FLAG_SW_ACTIVITY
)) {
358 val
= simple_strtoul(buf
, NULL
, 0);
360 case OFF
: case BLINK_ON
: case BLINK_OFF
:
361 rc
= ap
->ops
->sw_activity_store(atadev
, val
);
370 DEVICE_ATTR(sw_activity
, S_IWUSR
| S_IRUGO
, ata_scsi_activity_show
,
371 ata_scsi_activity_store
);
372 EXPORT_SYMBOL_GPL(dev_attr_sw_activity
);
374 struct device_attribute
*ata_common_sdev_attrs
[] = {
375 &dev_attr_unload_heads
,
378 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs
);
380 static void ata_scsi_invalid_field(struct scsi_cmnd
*cmd
,
381 void (*done
)(struct scsi_cmnd
*))
383 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
384 /* "Invalid field in cbd" */
388 int ata_std_bios_param(struct scsi_device
*sdev
, struct block_device
*bdev
,
389 sector_t capacity
, int geom
[])
393 sector_div(capacity
, 255*63);
400 * ata_scsi_unlock_native_capacity - unlock native capacity
401 * @sdev: SCSI device to adjust device capacity for
403 * This function is called if a partition on @sdev extends beyond
404 * the end of the device. It requests EH to unlock HPA.
407 * Defined by the SCSI layer. Might sleep.
409 void ata_scsi_unlock_native_capacity(struct scsi_device
*sdev
)
411 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
412 struct ata_device
*dev
;
415 spin_lock_irqsave(ap
->lock
, flags
);
417 dev
= ata_scsi_find_dev(ap
, sdev
);
418 if (dev
&& dev
->n_sectors
< dev
->n_native_sectors
) {
419 dev
->flags
|= ATA_DFLAG_UNLOCK_HPA
;
420 dev
->link
->eh_info
.action
|= ATA_EH_RESET
;
421 ata_port_schedule_eh(ap
);
424 spin_unlock_irqrestore(ap
->lock
, flags
);
425 ata_port_wait_eh(ap
);
429 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
431 * @sdev: SCSI device to get identify data for
432 * @arg: User buffer area for identify data
435 * Defined by the SCSI layer. We don't really care.
438 * Zero on success, negative errno on error.
440 static int ata_get_identity(struct ata_port
*ap
, struct scsi_device
*sdev
,
443 struct ata_device
*dev
= ata_scsi_find_dev(ap
, sdev
);
444 u16 __user
*dst
= arg
;
450 if (copy_to_user(dst
, dev
->id
, ATA_ID_WORDS
* sizeof(u16
)))
453 ata_id_string(dev
->id
, buf
, ATA_ID_PROD
, ATA_ID_PROD_LEN
);
454 if (copy_to_user(dst
+ ATA_ID_PROD
, buf
, ATA_ID_PROD_LEN
))
457 ata_id_string(dev
->id
, buf
, ATA_ID_FW_REV
, ATA_ID_FW_REV_LEN
);
458 if (copy_to_user(dst
+ ATA_ID_FW_REV
, buf
, ATA_ID_FW_REV_LEN
))
461 ata_id_string(dev
->id
, buf
, ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
462 if (copy_to_user(dst
+ ATA_ID_SERNO
, buf
, ATA_ID_SERNO_LEN
))
469 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
470 * @scsidev: Device to which we are issuing command
471 * @arg: User provided data for issuing command
474 * Defined by the SCSI layer. We don't really care.
477 * Zero on success, negative errno on error.
479 int ata_cmd_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
482 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
483 u8 args
[4], *argbuf
= NULL
, *sensebuf
= NULL
;
485 enum dma_data_direction data_dir
;
491 if (copy_from_user(args
, arg
, sizeof(args
)))
494 sensebuf
= kzalloc(SCSI_SENSE_BUFFERSIZE
, GFP_NOIO
);
498 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
501 argsize
= SECTOR_SIZE
* args
[3];
502 argbuf
= kmalloc(argsize
, GFP_KERNEL
);
503 if (argbuf
== NULL
) {
508 scsi_cmd
[1] = (4 << 1); /* PIO Data-in */
509 scsi_cmd
[2] = 0x0e; /* no off.line or cc, read from dev,
510 block count in sector count field */
511 data_dir
= DMA_FROM_DEVICE
;
513 scsi_cmd
[1] = (3 << 1); /* Non-data */
514 scsi_cmd
[2] = 0x20; /* cc but no off.line or data xfer */
518 scsi_cmd
[0] = ATA_16
;
520 scsi_cmd
[4] = args
[2];
521 if (args
[0] == ATA_CMD_SMART
) { /* hack -- ide driver does this too */
522 scsi_cmd
[6] = args
[3];
523 scsi_cmd
[8] = args
[1];
527 scsi_cmd
[6] = args
[1];
529 scsi_cmd
[14] = args
[0];
531 /* Good values for timeout and retries? Values below
532 from scsi_ioctl_send_command() for default case... */
533 cmd_result
= scsi_execute(scsidev
, scsi_cmd
, data_dir
, argbuf
, argsize
,
534 sensebuf
, (10*HZ
), 5, 0, NULL
);
536 if (driver_byte(cmd_result
) == DRIVER_SENSE
) {/* sense data available */
537 u8
*desc
= sensebuf
+ 8;
538 cmd_result
&= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
540 /* If we set cc then ATA pass-through will cause a
541 * check condition even if no error. Filter that. */
542 if (cmd_result
& SAM_STAT_CHECK_CONDITION
) {
543 struct scsi_sense_hdr sshdr
;
544 scsi_normalize_sense(sensebuf
, SCSI_SENSE_BUFFERSIZE
,
546 if (sshdr
.sense_key
== 0 &&
547 sshdr
.asc
== 0 && sshdr
.ascq
== 0)
548 cmd_result
&= ~SAM_STAT_CHECK_CONDITION
;
551 /* Send userspace a few ATA registers (same as drivers/ide) */
552 if (sensebuf
[0] == 0x72 && /* format is "descriptor" */
553 desc
[0] == 0x09) { /* code is "ATA Descriptor" */
554 args
[0] = desc
[13]; /* status */
555 args
[1] = desc
[3]; /* error */
556 args
[2] = desc
[5]; /* sector count (0:7) */
557 if (copy_to_user(arg
, args
, sizeof(args
)))
569 && copy_to_user(arg
+ sizeof(args
), argbuf
, argsize
))
578 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
579 * @scsidev: Device to which we are issuing command
580 * @arg: User provided data for issuing command
583 * Defined by the SCSI layer. We don't really care.
586 * Zero on success, negative errno on error.
588 int ata_task_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
591 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
592 u8 args
[7], *sensebuf
= NULL
;
598 if (copy_from_user(args
, arg
, sizeof(args
)))
601 sensebuf
= kzalloc(SCSI_SENSE_BUFFERSIZE
, GFP_NOIO
);
605 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
606 scsi_cmd
[0] = ATA_16
;
607 scsi_cmd
[1] = (3 << 1); /* Non-data */
608 scsi_cmd
[2] = 0x20; /* cc but no off.line or data xfer */
609 scsi_cmd
[4] = args
[1];
610 scsi_cmd
[6] = args
[2];
611 scsi_cmd
[8] = args
[3];
612 scsi_cmd
[10] = args
[4];
613 scsi_cmd
[12] = args
[5];
614 scsi_cmd
[13] = args
[6] & 0x4f;
615 scsi_cmd
[14] = args
[0];
617 /* Good values for timeout and retries? Values below
618 from scsi_ioctl_send_command() for default case... */
619 cmd_result
= scsi_execute(scsidev
, scsi_cmd
, DMA_NONE
, NULL
, 0,
620 sensebuf
, (10*HZ
), 5, 0, NULL
);
622 if (driver_byte(cmd_result
) == DRIVER_SENSE
) {/* sense data available */
623 u8
*desc
= sensebuf
+ 8;
624 cmd_result
&= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
626 /* If we set cc then ATA pass-through will cause a
627 * check condition even if no error. Filter that. */
628 if (cmd_result
& SAM_STAT_CHECK_CONDITION
) {
629 struct scsi_sense_hdr sshdr
;
630 scsi_normalize_sense(sensebuf
, SCSI_SENSE_BUFFERSIZE
,
632 if (sshdr
.sense_key
== 0 &&
633 sshdr
.asc
== 0 && sshdr
.ascq
== 0)
634 cmd_result
&= ~SAM_STAT_CHECK_CONDITION
;
637 /* Send userspace ATA registers */
638 if (sensebuf
[0] == 0x72 && /* format is "descriptor" */
639 desc
[0] == 0x09) {/* code is "ATA Descriptor" */
640 args
[0] = desc
[13]; /* status */
641 args
[1] = desc
[3]; /* error */
642 args
[2] = desc
[5]; /* sector count (0:7) */
643 args
[3] = desc
[7]; /* lbal */
644 args
[4] = desc
[9]; /* lbam */
645 args
[5] = desc
[11]; /* lbah */
646 args
[6] = desc
[12]; /* select */
647 if (copy_to_user(arg
, args
, sizeof(args
)))
662 static int ata_ioc32(struct ata_port
*ap
)
664 if (ap
->flags
& ATA_FLAG_PIO_DMA
)
666 if (ap
->pflags
& ATA_PFLAG_PIO32
)
671 int ata_sas_scsi_ioctl(struct ata_port
*ap
, struct scsi_device
*scsidev
,
672 int cmd
, void __user
*arg
)
674 int val
= -EINVAL
, rc
= -EINVAL
;
678 case ATA_IOC_GET_IO32
:
679 spin_lock_irqsave(ap
->lock
, flags
);
681 spin_unlock_irqrestore(ap
->lock
, flags
);
682 if (copy_to_user(arg
, &val
, 1))
686 case ATA_IOC_SET_IO32
:
687 val
= (unsigned long) arg
;
689 spin_lock_irqsave(ap
->lock
, flags
);
690 if (ap
->pflags
& ATA_PFLAG_PIO32CHANGE
) {
692 ap
->pflags
|= ATA_PFLAG_PIO32
;
694 ap
->pflags
&= ~ATA_PFLAG_PIO32
;
696 if (val
!= ata_ioc32(ap
))
699 spin_unlock_irqrestore(ap
->lock
, flags
);
702 case HDIO_GET_IDENTITY
:
703 return ata_get_identity(ap
, scsidev
, arg
);
706 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
708 return ata_cmd_ioctl(scsidev
, arg
);
710 case HDIO_DRIVE_TASK
:
711 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
713 return ata_task_ioctl(scsidev
, arg
);
722 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl
);
724 int ata_scsi_ioctl(struct scsi_device
*scsidev
, int cmd
, void __user
*arg
)
726 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev
->host
),
729 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
732 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
733 * @dev: ATA device to which the new command is attached
734 * @cmd: SCSI command that originated this ATA command
735 * @done: SCSI command completion function
737 * Obtain a reference to an unused ata_queued_cmd structure,
738 * which is the basic libata structure representing a single
739 * ATA command sent to the hardware.
741 * If a command was available, fill in the SCSI-specific
742 * portions of the structure with information on the
746 * spin_lock_irqsave(host lock)
749 * Command allocated, or %NULL if none available.
751 static struct ata_queued_cmd
*ata_scsi_qc_new(struct ata_device
*dev
,
752 struct scsi_cmnd
*cmd
,
753 void (*done
)(struct scsi_cmnd
*))
755 struct ata_queued_cmd
*qc
;
757 qc
= ata_qc_new_init(dev
);
762 qc
->sg
= scsi_sglist(cmd
);
763 qc
->n_elem
= scsi_sg_count(cmd
);
765 cmd
->result
= (DID_OK
<< 16) | (QUEUE_FULL
<< 1);
772 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd
*qc
)
774 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
776 qc
->extrabytes
= scmd
->request
->extra_len
;
777 qc
->nbytes
= scsi_bufflen(scmd
) + qc
->extrabytes
;
781 * ata_dump_status - user friendly display of error info
782 * @id: id of the port in question
783 * @tf: ptr to filled out taskfile
785 * Decode and dump the ATA error/status registers for the user so
786 * that they have some idea what really happened at the non
787 * make-believe layer.
790 * inherited from caller
792 static void ata_dump_status(unsigned id
, struct ata_taskfile
*tf
)
794 u8 stat
= tf
->command
, err
= tf
->feature
;
796 printk(KERN_WARNING
"ata%u: status=0x%02x { ", id
, stat
);
797 if (stat
& ATA_BUSY
) {
798 printk("Busy }\n"); /* Data is not valid in this case */
800 if (stat
& 0x40) printk("DriveReady ");
801 if (stat
& 0x20) printk("DeviceFault ");
802 if (stat
& 0x10) printk("SeekComplete ");
803 if (stat
& 0x08) printk("DataRequest ");
804 if (stat
& 0x04) printk("CorrectedError ");
805 if (stat
& 0x02) printk("Index ");
806 if (stat
& 0x01) printk("Error ");
810 printk(KERN_WARNING
"ata%u: error=0x%02x { ", id
, err
);
811 if (err
& 0x04) printk("DriveStatusError ");
813 if (err
& 0x04) printk("BadCRC ");
814 else printk("Sector ");
816 if (err
& 0x40) printk("UncorrectableError ");
817 if (err
& 0x10) printk("SectorIdNotFound ");
818 if (err
& 0x02) printk("TrackZeroNotFound ");
819 if (err
& 0x01) printk("AddrMarkNotFound ");
826 * ata_to_sense_error - convert ATA error to SCSI error
827 * @id: ATA device number
828 * @drv_stat: value contained in ATA status register
829 * @drv_err: value contained in ATA error register
830 * @sk: the sense key we'll fill out
831 * @asc: the additional sense code we'll fill out
832 * @ascq: the additional sense code qualifier we'll fill out
833 * @verbose: be verbose
835 * Converts an ATA error into a SCSI error. Fill out pointers to
836 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
837 * format sense blocks.
840 * spin_lock_irqsave(host lock)
842 static void ata_to_sense_error(unsigned id
, u8 drv_stat
, u8 drv_err
, u8
*sk
,
843 u8
*asc
, u8
*ascq
, int verbose
)
847 /* Based on the 3ware driver translation table */
848 static const unsigned char sense_table
[][4] = {
850 {0xd1, ABORTED_COMMAND
, 0x00, 0x00}, // Device busy Aborted command
852 {0xd0, ABORTED_COMMAND
, 0x00, 0x00}, // Device busy Aborted command
854 {0x61, HARDWARE_ERROR
, 0x00, 0x00}, // Device fault Hardware error
855 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
856 {0x84, ABORTED_COMMAND
, 0x47, 0x00}, // Data CRC error SCSI parity error
857 /* MC|ID|ABRT|TRK0|MARK */
858 {0x37, NOT_READY
, 0x04, 0x00}, // Unit offline Not ready
860 {0x09, NOT_READY
, 0x04, 0x00}, // Unrecovered disk error Not ready
861 /* Bad address mark */
862 {0x01, MEDIUM_ERROR
, 0x13, 0x00}, // Address mark not found Address mark not found for data field
864 {0x02, HARDWARE_ERROR
, 0x00, 0x00}, // Track 0 not found Hardware error
866 {0x04, ABORTED_COMMAND
, 0x00, 0x00}, // Aborted command Aborted command
867 /* Media change request */
868 {0x08, NOT_READY
, 0x04, 0x00},
870 {0x10, ABORTED_COMMAND
, 0x14, 0x00}, // ID not found Recorded entity not found
872 {0x08, NOT_READY
, 0x04, 0x00},
874 {0x40, MEDIUM_ERROR
, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
875 /* BBD - block marked bad */
876 {0x80, MEDIUM_ERROR
, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
877 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
879 static const unsigned char stat_table
[][4] = {
880 /* Must be first because BUSY means no other bits valid */
881 {0x80, ABORTED_COMMAND
, 0x47, 0x00}, // Busy, fake parity for now
882 {0x20, HARDWARE_ERROR
, 0x00, 0x00}, // Device fault
883 {0x08, ABORTED_COMMAND
, 0x47, 0x00}, // Timed out in xfer, fake parity for now
884 {0x04, RECOVERED_ERROR
, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
885 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
889 * Is this an error we can process/parse
891 if (drv_stat
& ATA_BUSY
) {
892 drv_err
= 0; /* Ignore the err bits, they're invalid */
896 /* Look for drv_err */
897 for (i
= 0; sense_table
[i
][0] != 0xFF; i
++) {
898 /* Look for best matches first */
899 if ((sense_table
[i
][0] & drv_err
) ==
901 *sk
= sense_table
[i
][1];
902 *asc
= sense_table
[i
][2];
903 *ascq
= sense_table
[i
][3];
907 /* No immediate match */
909 printk(KERN_WARNING
"ata%u: no sense translation for "
910 "error 0x%02x\n", id
, drv_err
);
913 /* Fall back to interpreting status bits */
914 for (i
= 0; stat_table
[i
][0] != 0xFF; i
++) {
915 if (stat_table
[i
][0] & drv_stat
) {
916 *sk
= stat_table
[i
][1];
917 *asc
= stat_table
[i
][2];
918 *ascq
= stat_table
[i
][3];
922 /* No error? Undecoded? */
924 printk(KERN_WARNING
"ata%u: no sense translation for "
925 "status: 0x%02x\n", id
, drv_stat
);
927 /* We need a sensible error return here, which is tricky, and one
928 that won't cause people to do things like return a disk wrongly */
929 *sk
= ABORTED_COMMAND
;
935 printk(KERN_ERR
"ata%u: translated ATA stat/err 0x%02x/%02x "
936 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
937 id
, drv_stat
, drv_err
, *sk
, *asc
, *ascq
);
942 * ata_gen_passthru_sense - Generate check condition sense block.
943 * @qc: Command that completed.
945 * This function is specific to the ATA descriptor format sense
946 * block specified for the ATA pass through commands. Regardless
947 * of whether the command errored or not, return a sense
948 * block. Copy all controller registers into the sense
949 * block. Clear sense key, ASC & ASCQ if there is no error.
954 static void ata_gen_passthru_sense(struct ata_queued_cmd
*qc
)
956 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
957 struct ata_taskfile
*tf
= &qc
->result_tf
;
958 unsigned char *sb
= cmd
->sense_buffer
;
959 unsigned char *desc
= sb
+ 8;
960 int verbose
= qc
->ap
->ops
->error_handler
== NULL
;
962 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
964 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
967 * Use ata_to_sense_error() to map status register bits
968 * onto sense key, asc & ascq.
971 tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
972 ata_to_sense_error(qc
->ap
->print_id
, tf
->command
, tf
->feature
,
973 &sb
[1], &sb
[2], &sb
[3], verbose
);
978 * Sense data is current and format is descriptor.
984 /* set length of additional sense data */
989 * Copy registers into sense buffer.
992 desc
[3] = tf
->feature
; /* == error reg */
997 desc
[12] = tf
->device
;
998 desc
[13] = tf
->command
; /* == status reg */
1001 * Fill in Extend bit, and the high order bytes
1004 if (tf
->flags
& ATA_TFLAG_LBA48
) {
1006 desc
[4] = tf
->hob_nsect
;
1007 desc
[6] = tf
->hob_lbal
;
1008 desc
[8] = tf
->hob_lbam
;
1009 desc
[10] = tf
->hob_lbah
;
1014 * ata_gen_ata_sense - generate a SCSI fixed sense block
1015 * @qc: Command that we are erroring out
1017 * Generate sense block for a failed ATA command @qc. Descriptor
1018 * format is used to accomodate LBA48 block address.
1023 static void ata_gen_ata_sense(struct ata_queued_cmd
*qc
)
1025 struct ata_device
*dev
= qc
->dev
;
1026 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1027 struct ata_taskfile
*tf
= &qc
->result_tf
;
1028 unsigned char *sb
= cmd
->sense_buffer
;
1029 unsigned char *desc
= sb
+ 8;
1030 int verbose
= qc
->ap
->ops
->error_handler
== NULL
;
1033 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
1035 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
1037 /* sense data is current and format is descriptor */
1040 /* Use ata_to_sense_error() to map status register bits
1041 * onto sense key, asc & ascq.
1044 tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
1045 ata_to_sense_error(qc
->ap
->print_id
, tf
->command
, tf
->feature
,
1046 &sb
[1], &sb
[2], &sb
[3], verbose
);
1050 block
= ata_tf_read_block(&qc
->result_tf
, dev
);
1052 /* information sense data descriptor */
1057 desc
[2] |= 0x80; /* valid */
1058 desc
[6] = block
>> 40;
1059 desc
[7] = block
>> 32;
1060 desc
[8] = block
>> 24;
1061 desc
[9] = block
>> 16;
1062 desc
[10] = block
>> 8;
1066 static void ata_scsi_sdev_config(struct scsi_device
*sdev
)
1068 sdev
->use_10_for_rw
= 1;
1069 sdev
->use_10_for_ms
= 1;
1071 /* Schedule policy is determined by ->qc_defer() callback and
1072 * it needs to see every deferred qc. Set dev_blocked to 1 to
1073 * prevent SCSI midlayer from automatically deferring
1076 sdev
->max_device_blocked
= 1;
1080 * atapi_drain_needed - Check whether data transfer may overflow
1081 * @rq: request to be checked
1083 * ATAPI commands which transfer variable length data to host
1084 * might overflow due to application error or hardare bug. This
1085 * function checks whether overflow should be drained and ignored
1092 * 1 if ; otherwise, 0.
1094 static int atapi_drain_needed(struct request
*rq
)
1096 if (likely(rq
->cmd_type
!= REQ_TYPE_BLOCK_PC
))
1099 if (!blk_rq_bytes(rq
) || (rq
->cmd_flags
& REQ_WRITE
))
1102 return atapi_cmd_type(rq
->cmd
[0]) == ATAPI_MISC
;
1105 static int ata_scsi_dev_config(struct scsi_device
*sdev
,
1106 struct ata_device
*dev
)
1108 if (!ata_id_has_unload(dev
->id
))
1109 dev
->flags
|= ATA_DFLAG_NO_UNLOAD
;
1111 /* configure max sectors */
1112 blk_queue_max_hw_sectors(sdev
->request_queue
, dev
->max_sectors
);
1114 if (dev
->class == ATA_DEV_ATAPI
) {
1115 struct request_queue
*q
= sdev
->request_queue
;
1118 /* set the min alignment and padding */
1119 blk_queue_update_dma_alignment(sdev
->request_queue
,
1120 ATA_DMA_PAD_SZ
- 1);
1121 blk_queue_update_dma_pad(sdev
->request_queue
,
1122 ATA_DMA_PAD_SZ
- 1);
1124 /* configure draining */
1125 buf
= kmalloc(ATAPI_MAX_DRAIN
, q
->bounce_gfp
| GFP_KERNEL
);
1127 ata_dev_printk(dev
, KERN_ERR
,
1128 "drain buffer allocation failed\n");
1132 blk_queue_dma_drain(q
, atapi_drain_needed
, buf
, ATAPI_MAX_DRAIN
);
1134 /* ATA devices must be sector aligned */
1135 blk_queue_update_dma_alignment(sdev
->request_queue
,
1137 sdev
->manage_start_stop
= 1;
1140 if (dev
->flags
& ATA_DFLAG_AN
)
1141 set_bit(SDEV_EVT_MEDIA_CHANGE
, sdev
->supported_events
);
1143 if (dev
->flags
& ATA_DFLAG_NCQ
) {
1146 depth
= min(sdev
->host
->can_queue
, ata_id_queue_depth(dev
->id
));
1147 depth
= min(ATA_MAX_QUEUE
- 1, depth
);
1148 scsi_adjust_queue_depth(sdev
, MSG_SIMPLE_TAG
, depth
);
1155 * ata_scsi_slave_config - Set SCSI device attributes
1156 * @sdev: SCSI device to examine
1158 * This is called before we actually start reading
1159 * and writing to the device, to configure certain
1160 * SCSI mid-layer behaviors.
1163 * Defined by SCSI layer. We don't really care.
1166 int ata_scsi_slave_config(struct scsi_device
*sdev
)
1168 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1169 struct ata_device
*dev
= __ata_scsi_find_dev(ap
, sdev
);
1172 ata_scsi_sdev_config(sdev
);
1175 rc
= ata_scsi_dev_config(sdev
, dev
);
1181 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1182 * @sdev: SCSI device to be destroyed
1184 * @sdev is about to be destroyed for hot/warm unplugging. If
1185 * this unplugging was initiated by libata as indicated by NULL
1186 * dev->sdev, this function doesn't have to do anything.
1187 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1188 * Clear dev->sdev, schedule the device for ATA detach and invoke
1192 * Defined by SCSI layer. We don't really care.
1194 void ata_scsi_slave_destroy(struct scsi_device
*sdev
)
1196 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1197 struct request_queue
*q
= sdev
->request_queue
;
1198 unsigned long flags
;
1199 struct ata_device
*dev
;
1201 if (!ap
->ops
->error_handler
)
1204 spin_lock_irqsave(ap
->lock
, flags
);
1205 dev
= __ata_scsi_find_dev(ap
, sdev
);
1206 if (dev
&& dev
->sdev
) {
1207 /* SCSI device already in CANCEL state, no need to offline it */
1209 dev
->flags
|= ATA_DFLAG_DETACH
;
1210 ata_port_schedule_eh(ap
);
1212 spin_unlock_irqrestore(ap
->lock
, flags
);
1214 kfree(q
->dma_drain_buffer
);
1215 q
->dma_drain_buffer
= NULL
;
1216 q
->dma_drain_size
= 0;
1220 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1221 * @sdev: SCSI device to configure queue depth for
1222 * @queue_depth: new queue depth
1223 * @reason: calling context
1225 * This is libata standard hostt->change_queue_depth callback.
1226 * SCSI will call into this callback when user tries to set queue
1230 * SCSI layer (we don't care)
1233 * Newly configured queue depth.
1235 int ata_scsi_change_queue_depth(struct scsi_device
*sdev
, int queue_depth
,
1238 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1239 struct ata_device
*dev
;
1240 unsigned long flags
;
1242 if (reason
!= SCSI_QDEPTH_DEFAULT
)
1245 if (queue_depth
< 1 || queue_depth
== sdev
->queue_depth
)
1246 return sdev
->queue_depth
;
1248 dev
= ata_scsi_find_dev(ap
, sdev
);
1249 if (!dev
|| !ata_dev_enabled(dev
))
1250 return sdev
->queue_depth
;
1253 spin_lock_irqsave(ap
->lock
, flags
);
1254 dev
->flags
&= ~ATA_DFLAG_NCQ_OFF
;
1255 if (queue_depth
== 1 || !ata_ncq_enabled(dev
)) {
1256 dev
->flags
|= ATA_DFLAG_NCQ_OFF
;
1259 spin_unlock_irqrestore(ap
->lock
, flags
);
1261 /* limit and apply queue depth */
1262 queue_depth
= min(queue_depth
, sdev
->host
->can_queue
);
1263 queue_depth
= min(queue_depth
, ata_id_queue_depth(dev
->id
));
1264 queue_depth
= min(queue_depth
, ATA_MAX_QUEUE
- 1);
1266 if (sdev
->queue_depth
== queue_depth
)
1269 scsi_adjust_queue_depth(sdev
, MSG_SIMPLE_TAG
, queue_depth
);
1274 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1275 * @qc: Storage for translated ATA taskfile
1277 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1278 * (to start). Perhaps these commands should be preceded by
1279 * CHECK POWER MODE to see what power mode the device is already in.
1280 * [See SAT revision 5 at www.t10.org]
1283 * spin_lock_irqsave(host lock)
1286 * Zero on success, non-zero on error.
1288 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd
*qc
)
1290 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1291 struct ata_taskfile
*tf
= &qc
->tf
;
1292 const u8
*cdb
= scmd
->cmnd
;
1294 if (scmd
->cmd_len
< 5)
1297 tf
->flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1298 tf
->protocol
= ATA_PROT_NODATA
;
1300 ; /* ignore IMMED bit, violates sat-r05 */
1303 goto invalid_fld
; /* LOEJ bit set not supported */
1304 if (((cdb
[4] >> 4) & 0xf) != 0)
1305 goto invalid_fld
; /* power conditions not supported */
1308 tf
->nsect
= 1; /* 1 sector, lba=0 */
1310 if (qc
->dev
->flags
& ATA_DFLAG_LBA
) {
1311 tf
->flags
|= ATA_TFLAG_LBA
;
1316 tf
->device
|= ATA_LBA
;
1319 tf
->lbal
= 0x1; /* sect */
1320 tf
->lbam
= 0x0; /* cyl low */
1321 tf
->lbah
= 0x0; /* cyl high */
1324 tf
->command
= ATA_CMD_VERIFY
; /* READ VERIFY */
1326 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1327 * or S5) causing some drives to spin up and down again.
1329 if ((qc
->ap
->flags
& ATA_FLAG_NO_POWEROFF_SPINDOWN
) &&
1330 system_state
== SYSTEM_POWER_OFF
)
1333 if ((qc
->ap
->flags
& ATA_FLAG_NO_HIBERNATE_SPINDOWN
) &&
1334 system_entering_hibernation())
1337 /* Issue ATA STANDBY IMMEDIATE command */
1338 tf
->command
= ATA_CMD_STANDBYNOW1
;
1342 * Standby and Idle condition timers could be implemented but that
1343 * would require libata to implement the Power condition mode page
1344 * and allow the user to change it. Changing mode pages requires
1345 * MODE SELECT to be implemented.
1351 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1352 /* "Invalid field in cbd" */
1355 scmd
->result
= SAM_STAT_GOOD
;
1361 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1362 * @qc: Storage for translated ATA taskfile
1364 * Sets up an ATA taskfile to issue FLUSH CACHE or
1368 * spin_lock_irqsave(host lock)
1371 * Zero on success, non-zero on error.
1373 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd
*qc
)
1375 struct ata_taskfile
*tf
= &qc
->tf
;
1377 tf
->flags
|= ATA_TFLAG_DEVICE
;
1378 tf
->protocol
= ATA_PROT_NODATA
;
1380 if (qc
->dev
->flags
& ATA_DFLAG_FLUSH_EXT
)
1381 tf
->command
= ATA_CMD_FLUSH_EXT
;
1383 tf
->command
= ATA_CMD_FLUSH
;
1385 /* flush is critical for IO integrity, consider it an IO command */
1386 qc
->flags
|= ATA_QCFLAG_IO
;
1392 * scsi_6_lba_len - Get LBA and transfer length
1393 * @cdb: SCSI command to translate
1395 * Calculate LBA and transfer length for 6-byte commands.
1399 * @plen: the transfer length
1401 static void scsi_6_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1406 VPRINTK("six-byte command\n");
1408 lba
|= ((u64
)(cdb
[1] & 0x1f)) << 16;
1409 lba
|= ((u64
)cdb
[2]) << 8;
1410 lba
|= ((u64
)cdb
[3]);
1419 * scsi_10_lba_len - Get LBA and transfer length
1420 * @cdb: SCSI command to translate
1422 * Calculate LBA and transfer length for 10-byte commands.
1426 * @plen: the transfer length
1428 static void scsi_10_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1433 VPRINTK("ten-byte command\n");
1435 lba
|= ((u64
)cdb
[2]) << 24;
1436 lba
|= ((u64
)cdb
[3]) << 16;
1437 lba
|= ((u64
)cdb
[4]) << 8;
1438 lba
|= ((u64
)cdb
[5]);
1440 len
|= ((u32
)cdb
[7]) << 8;
1441 len
|= ((u32
)cdb
[8]);
1448 * scsi_16_lba_len - Get LBA and transfer length
1449 * @cdb: SCSI command to translate
1451 * Calculate LBA and transfer length for 16-byte commands.
1455 * @plen: the transfer length
1457 static void scsi_16_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1462 VPRINTK("sixteen-byte command\n");
1464 lba
|= ((u64
)cdb
[2]) << 56;
1465 lba
|= ((u64
)cdb
[3]) << 48;
1466 lba
|= ((u64
)cdb
[4]) << 40;
1467 lba
|= ((u64
)cdb
[5]) << 32;
1468 lba
|= ((u64
)cdb
[6]) << 24;
1469 lba
|= ((u64
)cdb
[7]) << 16;
1470 lba
|= ((u64
)cdb
[8]) << 8;
1471 lba
|= ((u64
)cdb
[9]);
1473 len
|= ((u32
)cdb
[10]) << 24;
1474 len
|= ((u32
)cdb
[11]) << 16;
1475 len
|= ((u32
)cdb
[12]) << 8;
1476 len
|= ((u32
)cdb
[13]);
1483 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1484 * @qc: Storage for translated ATA taskfile
1486 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1489 * spin_lock_irqsave(host lock)
1492 * Zero on success, non-zero on error.
1494 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd
*qc
)
1496 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1497 struct ata_taskfile
*tf
= &qc
->tf
;
1498 struct ata_device
*dev
= qc
->dev
;
1499 u64 dev_sectors
= qc
->dev
->n_sectors
;
1500 const u8
*cdb
= scmd
->cmnd
;
1504 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1505 tf
->protocol
= ATA_PROT_NODATA
;
1507 if (cdb
[0] == VERIFY
) {
1508 if (scmd
->cmd_len
< 10)
1510 scsi_10_lba_len(cdb
, &block
, &n_block
);
1511 } else if (cdb
[0] == VERIFY_16
) {
1512 if (scmd
->cmd_len
< 16)
1514 scsi_16_lba_len(cdb
, &block
, &n_block
);
1520 if (block
>= dev_sectors
)
1522 if ((block
+ n_block
) > dev_sectors
)
1525 if (dev
->flags
& ATA_DFLAG_LBA
) {
1526 tf
->flags
|= ATA_TFLAG_LBA
;
1528 if (lba_28_ok(block
, n_block
)) {
1530 tf
->command
= ATA_CMD_VERIFY
;
1531 tf
->device
|= (block
>> 24) & 0xf;
1532 } else if (lba_48_ok(block
, n_block
)) {
1533 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
1537 tf
->flags
|= ATA_TFLAG_LBA48
;
1538 tf
->command
= ATA_CMD_VERIFY_EXT
;
1540 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
1542 tf
->hob_lbah
= (block
>> 40) & 0xff;
1543 tf
->hob_lbam
= (block
>> 32) & 0xff;
1544 tf
->hob_lbal
= (block
>> 24) & 0xff;
1546 /* request too large even for LBA48 */
1549 tf
->nsect
= n_block
& 0xff;
1551 tf
->lbah
= (block
>> 16) & 0xff;
1552 tf
->lbam
= (block
>> 8) & 0xff;
1553 tf
->lbal
= block
& 0xff;
1555 tf
->device
|= ATA_LBA
;
1558 u32 sect
, head
, cyl
, track
;
1560 if (!lba_28_ok(block
, n_block
))
1563 /* Convert LBA to CHS */
1564 track
= (u32
)block
/ dev
->sectors
;
1565 cyl
= track
/ dev
->heads
;
1566 head
= track
% dev
->heads
;
1567 sect
= (u32
)block
% dev
->sectors
+ 1;
1569 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1570 (u32
)block
, track
, cyl
, head
, sect
);
1572 /* Check whether the converted CHS can fit.
1576 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
1579 tf
->command
= ATA_CMD_VERIFY
;
1580 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
1583 tf
->lbah
= cyl
>> 8;
1590 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1591 /* "Invalid field in cbd" */
1595 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1596 /* "Logical Block Address out of range" */
1600 scmd
->result
= SAM_STAT_GOOD
;
1605 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1606 * @qc: Storage for translated ATA taskfile
1608 * Converts any of six SCSI read/write commands into the
1609 * ATA counterpart, including starting sector (LBA),
1610 * sector count, and taking into account the device's LBA48
1613 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1614 * %WRITE_16 are currently supported.
1617 * spin_lock_irqsave(host lock)
1620 * Zero on success, non-zero on error.
1622 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd
*qc
)
1624 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1625 const u8
*cdb
= scmd
->cmnd
;
1626 unsigned int tf_flags
= 0;
1631 if (cdb
[0] == WRITE_10
|| cdb
[0] == WRITE_6
|| cdb
[0] == WRITE_16
)
1632 tf_flags
|= ATA_TFLAG_WRITE
;
1634 /* Calculate the SCSI LBA, transfer length and FUA. */
1638 if (unlikely(scmd
->cmd_len
< 10))
1640 scsi_10_lba_len(cdb
, &block
, &n_block
);
1641 if (unlikely(cdb
[1] & (1 << 3)))
1642 tf_flags
|= ATA_TFLAG_FUA
;
1646 if (unlikely(scmd
->cmd_len
< 6))
1648 scsi_6_lba_len(cdb
, &block
, &n_block
);
1650 /* for 6-byte r/w commands, transfer length 0
1651 * means 256 blocks of data, not 0 block.
1658 if (unlikely(scmd
->cmd_len
< 16))
1660 scsi_16_lba_len(cdb
, &block
, &n_block
);
1661 if (unlikely(cdb
[1] & (1 << 3)))
1662 tf_flags
|= ATA_TFLAG_FUA
;
1665 DPRINTK("no-byte command\n");
1669 /* Check and compose ATA command */
1671 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1672 * length 0 means transfer 0 block of data.
1673 * However, for ATA R/W commands, sector count 0 means
1674 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1676 * WARNING: one or two older ATA drives treat 0 as 0...
1680 qc
->flags
|= ATA_QCFLAG_IO
;
1681 qc
->nbytes
= n_block
* ATA_SECT_SIZE
;
1683 rc
= ata_build_rw_tf(&qc
->tf
, qc
->dev
, block
, n_block
, tf_flags
,
1685 if (likely(rc
== 0))
1690 /* treat all other errors as -EINVAL, fall through */
1692 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1693 /* "Invalid field in cbd" */
1697 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1698 /* "Logical Block Address out of range" */
1702 scmd
->result
= SAM_STAT_GOOD
;
1706 static void ata_scsi_qc_complete(struct ata_queued_cmd
*qc
)
1708 struct ata_port
*ap
= qc
->ap
;
1709 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1710 u8
*cdb
= cmd
->cmnd
;
1711 int need_sense
= (qc
->err_mask
!= 0);
1713 /* For ATA pass thru (SAT) commands, generate a sense block if
1714 * user mandated it or if there's an error. Note that if we
1715 * generate because the user forced us to, a check condition
1716 * is generated and the ATA register values are returned
1717 * whether the command completed successfully or not. If there
1718 * was no error, SK, ASC and ASCQ will all be zero.
1720 if (((cdb
[0] == ATA_16
) || (cdb
[0] == ATA_12
)) &&
1721 ((cdb
[2] & 0x20) || need_sense
)) {
1722 ata_gen_passthru_sense(qc
);
1725 cmd
->result
= SAM_STAT_GOOD
;
1727 /* TODO: decide which descriptor format to use
1728 * for 48b LBA devices and call that here
1729 * instead of the fixed desc, which is only
1730 * good for smaller LBA (and maybe CHS?)
1733 ata_gen_ata_sense(qc
);
1737 if (need_sense
&& !ap
->ops
->error_handler
)
1738 ata_dump_status(ap
->print_id
, &qc
->result_tf
);
1746 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1747 * @dev: ATA device to which the command is addressed
1748 * @cmd: SCSI command to execute
1749 * @done: SCSI command completion function
1750 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1752 * Our ->queuecommand() function has decided that the SCSI
1753 * command issued can be directly translated into an ATA
1754 * command, rather than handled internally.
1756 * This function sets up an ata_queued_cmd structure for the
1757 * SCSI command, and sends that ata_queued_cmd to the hardware.
1759 * The xlat_func argument (actor) returns 0 if ready to execute
1760 * ATA command, else 1 to finish translation. If 1 is returned
1761 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1762 * to be set reflecting an error condition or clean (early)
1766 * spin_lock_irqsave(host lock)
1769 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1770 * needs to be deferred.
1772 static int ata_scsi_translate(struct ata_device
*dev
, struct scsi_cmnd
*cmd
,
1773 void (*done
)(struct scsi_cmnd
*),
1774 ata_xlat_func_t xlat_func
)
1776 struct ata_port
*ap
= dev
->link
->ap
;
1777 struct ata_queued_cmd
*qc
;
1782 qc
= ata_scsi_qc_new(dev
, cmd
, done
);
1786 /* data is present; dma-map it */
1787 if (cmd
->sc_data_direction
== DMA_FROM_DEVICE
||
1788 cmd
->sc_data_direction
== DMA_TO_DEVICE
) {
1789 if (unlikely(scsi_bufflen(cmd
) < 1)) {
1790 ata_dev_printk(dev
, KERN_WARNING
,
1791 "WARNING: zero len r/w req\n");
1795 ata_sg_init(qc
, scsi_sglist(cmd
), scsi_sg_count(cmd
));
1797 qc
->dma_dir
= cmd
->sc_data_direction
;
1800 qc
->complete_fn
= ata_scsi_qc_complete
;
1805 if (ap
->ops
->qc_defer
) {
1806 if ((rc
= ap
->ops
->qc_defer(qc
)))
1810 /* select device, send command to hardware */
1819 DPRINTK("EXIT - early finish (good or error)\n");
1824 cmd
->result
= (DID_ERROR
<< 16);
1827 DPRINTK("EXIT - internal\n");
1832 DPRINTK("EXIT - defer\n");
1833 if (rc
== ATA_DEFER_LINK
)
1834 return SCSI_MLQUEUE_DEVICE_BUSY
;
1836 return SCSI_MLQUEUE_HOST_BUSY
;
1840 * ata_scsi_rbuf_get - Map response buffer.
1841 * @cmd: SCSI command containing buffer to be mapped.
1842 * @flags: unsigned long variable to store irq enable status
1843 * @copy_in: copy in from user buffer
1845 * Prepare buffer for simulated SCSI commands.
1848 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
1851 * Pointer to response buffer.
1853 static void *ata_scsi_rbuf_get(struct scsi_cmnd
*cmd
, bool copy_in
,
1854 unsigned long *flags
)
1856 spin_lock_irqsave(&ata_scsi_rbuf_lock
, *flags
);
1858 memset(ata_scsi_rbuf
, 0, ATA_SCSI_RBUF_SIZE
);
1860 sg_copy_to_buffer(scsi_sglist(cmd
), scsi_sg_count(cmd
),
1861 ata_scsi_rbuf
, ATA_SCSI_RBUF_SIZE
);
1862 return ata_scsi_rbuf
;
1866 * ata_scsi_rbuf_put - Unmap response buffer.
1867 * @cmd: SCSI command containing buffer to be unmapped.
1868 * @copy_out: copy out result
1869 * @flags: @flags passed to ata_scsi_rbuf_get()
1871 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1872 * @copy_back is true.
1875 * Unlocks ata_scsi_rbuf_lock.
1877 static inline void ata_scsi_rbuf_put(struct scsi_cmnd
*cmd
, bool copy_out
,
1878 unsigned long *flags
)
1881 sg_copy_from_buffer(scsi_sglist(cmd
), scsi_sg_count(cmd
),
1882 ata_scsi_rbuf
, ATA_SCSI_RBUF_SIZE
);
1883 spin_unlock_irqrestore(&ata_scsi_rbuf_lock
, *flags
);
1887 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1888 * @args: device IDENTIFY data / SCSI command of interest.
1889 * @actor: Callback hook for desired SCSI command simulator
1891 * Takes care of the hard work of simulating a SCSI command...
1892 * Mapping the response buffer, calling the command's handler,
1893 * and handling the handler's return value. This return value
1894 * indicates whether the handler wishes the SCSI command to be
1895 * completed successfully (0), or not (in which case cmd->result
1896 * and sense buffer are assumed to be set).
1899 * spin_lock_irqsave(host lock)
1901 static void ata_scsi_rbuf_fill(struct ata_scsi_args
*args
,
1902 unsigned int (*actor
)(struct ata_scsi_args
*args
, u8
*rbuf
))
1906 struct scsi_cmnd
*cmd
= args
->cmd
;
1907 unsigned long flags
;
1909 rbuf
= ata_scsi_rbuf_get(cmd
, false, &flags
);
1910 rc
= actor(args
, rbuf
);
1911 ata_scsi_rbuf_put(cmd
, rc
== 0, &flags
);
1914 cmd
->result
= SAM_STAT_GOOD
;
1919 * ata_scsiop_inq_std - Simulate INQUIRY command
1920 * @args: device IDENTIFY data / SCSI command of interest.
1921 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1923 * Returns standard device identification data associated
1924 * with non-VPD INQUIRY command output.
1927 * spin_lock_irqsave(host lock)
1929 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args
*args
, u8
*rbuf
)
1931 const u8 versions
[] = {
1932 0x60, /* SAM-3 (no version claimed) */
1935 0x20, /* SBC-2 (no version claimed) */
1938 0x60 /* SPC-3 (no version claimed) */
1943 0x5, /* claim SPC-3 version compatibility */
1950 /* set scsi removeable (RMB) bit per ata bit */
1951 if (ata_id_removeable(args
->id
))
1954 memcpy(rbuf
, hdr
, sizeof(hdr
));
1955 memcpy(&rbuf
[8], "ATA ", 8);
1956 ata_id_string(args
->id
, &rbuf
[16], ATA_ID_PROD
, 16);
1957 ata_id_string(args
->id
, &rbuf
[32], ATA_ID_FW_REV
, 4);
1959 if (rbuf
[32] == 0 || rbuf
[32] == ' ')
1960 memcpy(&rbuf
[32], "n/a ", 4);
1962 memcpy(rbuf
+ 59, versions
, sizeof(versions
));
1968 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1969 * @args: device IDENTIFY data / SCSI command of interest.
1970 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1972 * Returns list of inquiry VPD pages available.
1975 * spin_lock_irqsave(host lock)
1977 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args
*args
, u8
*rbuf
)
1979 const u8 pages
[] = {
1980 0x00, /* page 0x00, this page */
1981 0x80, /* page 0x80, unit serial no page */
1982 0x83, /* page 0x83, device ident page */
1983 0x89, /* page 0x89, ata info page */
1984 0xb0, /* page 0xb0, block limits page */
1985 0xb1, /* page 0xb1, block device characteristics page */
1988 rbuf
[3] = sizeof(pages
); /* number of supported VPD pages */
1989 memcpy(rbuf
+ 4, pages
, sizeof(pages
));
1994 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1995 * @args: device IDENTIFY data / SCSI command of interest.
1996 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1998 * Returns ATA device serial number.
2001 * spin_lock_irqsave(host lock)
2003 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args
*args
, u8
*rbuf
)
2007 0x80, /* this page code */
2009 ATA_ID_SERNO_LEN
, /* page len */
2012 memcpy(rbuf
, hdr
, sizeof(hdr
));
2013 ata_id_string(args
->id
, (unsigned char *) &rbuf
[4],
2014 ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
2019 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
2020 * @args: device IDENTIFY data / SCSI command of interest.
2021 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2023 * Yields two logical unit device identification designators:
2024 * - vendor specific ASCII containing the ATA serial number
2025 * - SAT defined "t10 vendor id based" containing ASCII vendor
2026 * name ("ATA "), model and serial numbers.
2029 * spin_lock_irqsave(host lock)
2031 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args
*args
, u8
*rbuf
)
2033 const int sat_model_serial_desc_len
= 68;
2036 rbuf
[1] = 0x83; /* this page code */
2039 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2041 rbuf
[num
+ 3] = ATA_ID_SERNO_LEN
;
2043 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
,
2044 ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
2045 num
+= ATA_ID_SERNO_LEN
;
2047 /* SAT defined lu model and serial numbers descriptor */
2048 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2051 rbuf
[num
+ 3] = sat_model_serial_desc_len
;
2053 memcpy(rbuf
+ num
, "ATA ", 8);
2055 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
, ATA_ID_PROD
,
2057 num
+= ATA_ID_PROD_LEN
;
2058 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
, ATA_ID_SERNO
,
2060 num
+= ATA_ID_SERNO_LEN
;
2062 rbuf
[3] = num
- 4; /* page len (assume less than 256 bytes) */
2067 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2068 * @args: device IDENTIFY data / SCSI command of interest.
2069 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2071 * Yields SAT-specified ATA VPD page.
2074 * spin_lock_irqsave(host lock)
2076 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args
*args
, u8
*rbuf
)
2078 struct ata_taskfile tf
;
2080 memset(&tf
, 0, sizeof(tf
));
2082 rbuf
[1] = 0x89; /* our page code */
2083 rbuf
[2] = (0x238 >> 8); /* page size fixed at 238h */
2084 rbuf
[3] = (0x238 & 0xff);
2086 memcpy(&rbuf
[8], "linux ", 8);
2087 memcpy(&rbuf
[16], "libata ", 16);
2088 memcpy(&rbuf
[32], DRV_VERSION
, 4);
2089 ata_id_string(args
->id
, &rbuf
[32], ATA_ID_FW_REV
, 4);
2091 /* we don't store the ATA device signature, so we fake it */
2093 tf
.command
= ATA_DRDY
; /* really, this is Status reg */
2097 ata_tf_to_fis(&tf
, 0, 1, &rbuf
[36]); /* TODO: PMP? */
2098 rbuf
[36] = 0x34; /* force D2H Reg FIS (34h) */
2100 rbuf
[56] = ATA_CMD_ID_ATA
;
2102 memcpy(&rbuf
[60], &args
->id
[0], 512);
2106 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args
*args
, u8
*rbuf
)
2111 rbuf
[3] = 0x3c; /* required VPD size with unmap support */
2114 * Optimal transfer length granularity.
2116 * This is always one physical block, but for disks with a smaller
2117 * logical than physical sector size we need to figure out what the
2120 if (ata_id_has_large_logical_sectors(args
->id
))
2121 min_io_sectors
= ata_id_logical_per_physical_sectors(args
->id
);
2124 put_unaligned_be16(min_io_sectors
, &rbuf
[6]);
2127 * Optimal unmap granularity.
2129 * The ATA spec doesn't even know about a granularity or alignment
2130 * for the TRIM command. We can leave away most of the unmap related
2131 * VPD page entries, but we have specifify a granularity to signal
2132 * that we support some form of unmap - in thise case via WRITE SAME
2133 * with the unmap bit set.
2135 if (ata_id_has_trim(args
->id
)) {
2136 put_unaligned_be32(65535 * 512 / 8, &rbuf
[20]);
2137 put_unaligned_be32(1, &rbuf
[28]);
2143 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args
*args
, u8
*rbuf
)
2145 int form_factor
= ata_id_form_factor(args
->id
);
2146 int media_rotation_rate
= ata_id_rotation_rate(args
->id
);
2150 rbuf
[4] = media_rotation_rate
>> 8;
2151 rbuf
[5] = media_rotation_rate
;
2152 rbuf
[7] = form_factor
;
2158 * ata_scsiop_noop - Command handler that simply returns success.
2159 * @args: device IDENTIFY data / SCSI command of interest.
2160 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2162 * No operation. Simply returns success to caller, to indicate
2163 * that the caller should successfully complete this SCSI command.
2166 * spin_lock_irqsave(host lock)
2168 static unsigned int ata_scsiop_noop(struct ata_scsi_args
*args
, u8
*rbuf
)
2175 * ata_msense_caching - Simulate MODE SENSE caching info page
2176 * @id: device IDENTIFY data
2177 * @buf: output buffer
2179 * Generate a caching info page, which conditionally indicates
2180 * write caching to the SCSI layer, depending on device
2186 static unsigned int ata_msense_caching(u16
*id
, u8
*buf
)
2188 memcpy(buf
, def_cache_mpage
, sizeof(def_cache_mpage
));
2189 if (ata_id_wcache_enabled(id
))
2190 buf
[2] |= (1 << 2); /* write cache enable */
2191 if (!ata_id_rahead_enabled(id
))
2192 buf
[12] |= (1 << 5); /* disable read ahead */
2193 return sizeof(def_cache_mpage
);
2197 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
2198 * @buf: output buffer
2200 * Generate a generic MODE SENSE control mode page.
2205 static unsigned int ata_msense_ctl_mode(u8
*buf
)
2207 memcpy(buf
, def_control_mpage
, sizeof(def_control_mpage
));
2208 return sizeof(def_control_mpage
);
2212 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2213 * @buf: output buffer
2215 * Generate a generic MODE SENSE r/w error recovery page.
2220 static unsigned int ata_msense_rw_recovery(u8
*buf
)
2222 memcpy(buf
, def_rw_recovery_mpage
, sizeof(def_rw_recovery_mpage
));
2223 return sizeof(def_rw_recovery_mpage
);
2227 * We can turn this into a real blacklist if it's needed, for now just
2228 * blacklist any Maxtor BANC1G10 revision firmware
2230 static int ata_dev_supports_fua(u16
*id
)
2232 unsigned char model
[ATA_ID_PROD_LEN
+ 1], fw
[ATA_ID_FW_REV_LEN
+ 1];
2236 if (!ata_id_has_fua(id
))
2239 ata_id_c_string(id
, model
, ATA_ID_PROD
, sizeof(model
));
2240 ata_id_c_string(id
, fw
, ATA_ID_FW_REV
, sizeof(fw
));
2242 if (strcmp(model
, "Maxtor"))
2244 if (strcmp(fw
, "BANC1G10"))
2247 return 0; /* blacklisted */
2251 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2252 * @args: device IDENTIFY data / SCSI command of interest.
2253 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2255 * Simulate MODE SENSE commands. Assume this is invoked for direct
2256 * access devices (e.g. disks) only. There should be no block
2257 * descriptor for other device types.
2260 * spin_lock_irqsave(host lock)
2262 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args
*args
, u8
*rbuf
)
2264 struct ata_device
*dev
= args
->dev
;
2265 u8
*scsicmd
= args
->cmd
->cmnd
, *p
= rbuf
;
2266 const u8 sat_blk_desc
[] = {
2267 0, 0, 0, 0, /* number of blocks: sat unspecified */
2269 0, 0x2, 0x0 /* block length: 512 bytes */
2272 unsigned int ebd
, page_control
, six_byte
;
2277 six_byte
= (scsicmd
[0] == MODE_SENSE
);
2278 ebd
= !(scsicmd
[1] & 0x8); /* dbd bit inverted == edb */
2280 * LLBA bit in msense(10) ignored (compliant)
2283 page_control
= scsicmd
[2] >> 6;
2284 switch (page_control
) {
2285 case 0: /* current */
2286 break; /* supported */
2288 goto saving_not_supp
;
2289 case 1: /* changeable */
2290 case 2: /* defaults */
2296 p
+= 4 + (ebd
? 8 : 0);
2298 p
+= 8 + (ebd
? 8 : 0);
2300 pg
= scsicmd
[2] & 0x3f;
2303 * No mode subpages supported (yet) but asking for _all_
2304 * subpages may be valid
2306 if (spg
&& (spg
!= ALL_SUB_MPAGES
))
2310 case RW_RECOVERY_MPAGE
:
2311 p
+= ata_msense_rw_recovery(p
);
2315 p
+= ata_msense_caching(args
->id
, p
);
2319 p
+= ata_msense_ctl_mode(p
);
2323 p
+= ata_msense_rw_recovery(p
);
2324 p
+= ata_msense_caching(args
->id
, p
);
2325 p
+= ata_msense_ctl_mode(p
);
2328 default: /* invalid page code */
2333 if (ata_dev_supports_fua(args
->id
) && (dev
->flags
& ATA_DFLAG_LBA48
) &&
2334 (!(dev
->flags
& ATA_DFLAG_PIO
) || dev
->multi_count
))
2338 rbuf
[0] = p
- rbuf
- 1;
2341 rbuf
[3] = sizeof(sat_blk_desc
);
2342 memcpy(rbuf
+ 4, sat_blk_desc
, sizeof(sat_blk_desc
));
2345 unsigned int output_len
= p
- rbuf
- 2;
2347 rbuf
[0] = output_len
>> 8;
2348 rbuf
[1] = output_len
;
2351 rbuf
[7] = sizeof(sat_blk_desc
);
2352 memcpy(rbuf
+ 8, sat_blk_desc
, sizeof(sat_blk_desc
));
2358 ata_scsi_set_sense(args
->cmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
2359 /* "Invalid field in cbd" */
2363 ata_scsi_set_sense(args
->cmd
, ILLEGAL_REQUEST
, 0x39, 0x0);
2364 /* "Saving parameters not supported" */
2369 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2370 * @args: device IDENTIFY data / SCSI command of interest.
2371 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2373 * Simulate READ CAPACITY commands.
2378 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args
*args
, u8
*rbuf
)
2380 struct ata_device
*dev
= args
->dev
;
2381 u64 last_lba
= dev
->n_sectors
- 1; /* LBA of the last block */
2382 u8 log_per_phys
= 0;
2383 u16 lowest_aligned
= 0;
2384 u16 word_106
= dev
->id
[106];
2385 u16 word_209
= dev
->id
[209];
2387 if ((word_106
& 0xc000) == 0x4000) {
2388 /* Number and offset of logical sectors per physical sector */
2389 if (word_106
& (1 << 13))
2390 log_per_phys
= word_106
& 0xf;
2391 if ((word_209
& 0xc000) == 0x4000) {
2392 u16 first
= dev
->id
[209] & 0x3fff;
2394 lowest_aligned
= (1 << log_per_phys
) - first
;
2400 if (args
->cmd
->cmnd
[0] == READ_CAPACITY
) {
2401 if (last_lba
>= 0xffffffffULL
)
2402 last_lba
= 0xffffffff;
2404 /* sector count, 32-bit */
2405 rbuf
[0] = last_lba
>> (8 * 3);
2406 rbuf
[1] = last_lba
>> (8 * 2);
2407 rbuf
[2] = last_lba
>> (8 * 1);
2411 rbuf
[6] = ATA_SECT_SIZE
>> 8;
2412 rbuf
[7] = ATA_SECT_SIZE
& 0xff;
2414 /* sector count, 64-bit */
2415 rbuf
[0] = last_lba
>> (8 * 7);
2416 rbuf
[1] = last_lba
>> (8 * 6);
2417 rbuf
[2] = last_lba
>> (8 * 5);
2418 rbuf
[3] = last_lba
>> (8 * 4);
2419 rbuf
[4] = last_lba
>> (8 * 3);
2420 rbuf
[5] = last_lba
>> (8 * 2);
2421 rbuf
[6] = last_lba
>> (8 * 1);
2425 rbuf
[10] = ATA_SECT_SIZE
>> 8;
2426 rbuf
[11] = ATA_SECT_SIZE
& 0xff;
2429 rbuf
[13] = log_per_phys
;
2430 rbuf
[14] = (lowest_aligned
>> 8) & 0x3f;
2431 rbuf
[15] = lowest_aligned
;
2433 if (ata_id_has_trim(args
->id
)) {
2434 rbuf
[14] |= 0x80; /* TPE */
2436 if (ata_id_has_zero_after_trim(args
->id
))
2437 rbuf
[14] |= 0x40; /* TPRZ */
2445 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2446 * @args: device IDENTIFY data / SCSI command of interest.
2447 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2449 * Simulate REPORT LUNS command.
2452 * spin_lock_irqsave(host lock)
2454 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args
*args
, u8
*rbuf
)
2457 rbuf
[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2462 static void atapi_sense_complete(struct ata_queued_cmd
*qc
)
2464 if (qc
->err_mask
&& ((qc
->err_mask
& AC_ERR_DEV
) == 0)) {
2465 ata_gen_passthru_sense(qc
);
2468 qc
->scsidone(qc
->scsicmd
);
2472 /* is it pointless to prefer PIO for "safety reasons"? */
2473 static inline int ata_pio_use_silly(struct ata_port
*ap
)
2475 return (ap
->flags
& ATA_FLAG_PIO_DMA
);
2478 static void atapi_request_sense(struct ata_queued_cmd
*qc
)
2480 struct ata_port
*ap
= qc
->ap
;
2481 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2483 DPRINTK("ATAPI request sense\n");
2485 memset(cmd
->sense_buffer
, 0, SCSI_SENSE_BUFFERSIZE
);
2487 #ifdef CONFIG_ATA_SFF
2488 if (ap
->ops
->sff_tf_read
)
2489 ap
->ops
->sff_tf_read(ap
, &qc
->tf
);
2492 /* fill these in, for the case where they are -not- overwritten */
2493 cmd
->sense_buffer
[0] = 0x70;
2494 cmd
->sense_buffer
[2] = qc
->tf
.feature
>> 4;
2498 /* setup sg table and init transfer direction */
2499 sg_init_one(&qc
->sgent
, cmd
->sense_buffer
, SCSI_SENSE_BUFFERSIZE
);
2500 ata_sg_init(qc
, &qc
->sgent
, 1);
2501 qc
->dma_dir
= DMA_FROM_DEVICE
;
2503 memset(&qc
->cdb
, 0, qc
->dev
->cdb_len
);
2504 qc
->cdb
[0] = REQUEST_SENSE
;
2505 qc
->cdb
[4] = SCSI_SENSE_BUFFERSIZE
;
2507 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2508 qc
->tf
.command
= ATA_CMD_PACKET
;
2510 if (ata_pio_use_silly(ap
)) {
2511 qc
->tf
.protocol
= ATAPI_PROT_DMA
;
2512 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
2514 qc
->tf
.protocol
= ATAPI_PROT_PIO
;
2515 qc
->tf
.lbam
= SCSI_SENSE_BUFFERSIZE
;
2518 qc
->nbytes
= SCSI_SENSE_BUFFERSIZE
;
2520 qc
->complete_fn
= atapi_sense_complete
;
2527 static void atapi_qc_complete(struct ata_queued_cmd
*qc
)
2529 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2530 unsigned int err_mask
= qc
->err_mask
;
2532 VPRINTK("ENTER, err_mask 0x%X\n", err_mask
);
2534 /* handle completion from new EH */
2535 if (unlikely(qc
->ap
->ops
->error_handler
&&
2536 (err_mask
|| qc
->flags
& ATA_QCFLAG_SENSE_VALID
))) {
2538 if (!(qc
->flags
& ATA_QCFLAG_SENSE_VALID
)) {
2539 ata_gen_passthru_sense(qc
);
2542 /* SCSI EH automatically locks door if sdev->locked is
2543 * set. Sometimes door lock request continues to
2544 * fail, for example, when no media is present. This
2545 * creates a loop - SCSI EH issues door lock which
2546 * fails and gets invoked again to acquire sense data
2547 * for the failed command.
2549 * If door lock fails, always clear sdev->locked to
2550 * avoid this infinite loop.
2552 * This may happen before SCSI scan is complete. Make
2553 * sure qc->dev->sdev isn't NULL before dereferencing.
2555 if (qc
->cdb
[0] == ALLOW_MEDIUM_REMOVAL
&& qc
->dev
->sdev
)
2556 qc
->dev
->sdev
->locked
= 0;
2558 qc
->scsicmd
->result
= SAM_STAT_CHECK_CONDITION
;
2564 /* successful completion or old EH failure path */
2565 if (unlikely(err_mask
& AC_ERR_DEV
)) {
2566 cmd
->result
= SAM_STAT_CHECK_CONDITION
;
2567 atapi_request_sense(qc
);
2569 } else if (unlikely(err_mask
)) {
2570 ata_gen_passthru_sense(qc
);
2572 u8
*scsicmd
= cmd
->cmnd
;
2574 if ((scsicmd
[0] == INQUIRY
) && ((scsicmd
[1] & 0x03) == 0)) {
2575 unsigned long flags
;
2578 buf
= ata_scsi_rbuf_get(cmd
, true, &flags
);
2580 /* ATAPI devices typically report zero for their SCSI version,
2581 * and sometimes deviate from the spec WRT response data
2582 * format. If SCSI version is reported as zero like normal,
2583 * then we make the following fixups: 1) Fake MMC-5 version,
2584 * to indicate to the Linux scsi midlayer this is a modern
2585 * device. 2) Ensure response data format / ATAPI information
2586 * are always correct.
2593 ata_scsi_rbuf_put(cmd
, true, &flags
);
2596 cmd
->result
= SAM_STAT_GOOD
;
2603 * atapi_xlat - Initialize PACKET taskfile
2604 * @qc: command structure to be initialized
2607 * spin_lock_irqsave(host lock)
2610 * Zero on success, non-zero on failure.
2612 static unsigned int atapi_xlat(struct ata_queued_cmd
*qc
)
2614 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
2615 struct ata_device
*dev
= qc
->dev
;
2616 int nodata
= (scmd
->sc_data_direction
== DMA_NONE
);
2617 int using_pio
= !nodata
&& (dev
->flags
& ATA_DFLAG_PIO
);
2618 unsigned int nbytes
;
2620 memset(qc
->cdb
, 0, dev
->cdb_len
);
2621 memcpy(qc
->cdb
, scmd
->cmnd
, scmd
->cmd_len
);
2623 qc
->complete_fn
= atapi_qc_complete
;
2625 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2626 if (scmd
->sc_data_direction
== DMA_TO_DEVICE
) {
2627 qc
->tf
.flags
|= ATA_TFLAG_WRITE
;
2628 DPRINTK("direction: write\n");
2631 qc
->tf
.command
= ATA_CMD_PACKET
;
2632 ata_qc_set_pc_nbytes(qc
);
2634 /* check whether ATAPI DMA is safe */
2635 if (!nodata
&& !using_pio
&& atapi_check_dma(qc
))
2638 /* Some controller variants snoop this value for Packet
2639 * transfers to do state machine and FIFO management. Thus we
2640 * want to set it properly, and for DMA where it is
2641 * effectively meaningless.
2643 nbytes
= min(ata_qc_raw_nbytes(qc
), (unsigned int)63 * 1024);
2645 /* Most ATAPI devices which honor transfer chunk size don't
2646 * behave according to the spec when odd chunk size which
2647 * matches the transfer length is specified. If the number of
2648 * bytes to transfer is 2n+1. According to the spec, what
2649 * should happen is to indicate that 2n+1 is going to be
2650 * transferred and transfer 2n+2 bytes where the last byte is
2653 * In practice, this doesn't happen. ATAPI devices first
2654 * indicate and transfer 2n bytes and then indicate and
2655 * transfer 2 bytes where the last byte is padding.
2657 * This inconsistency confuses several controllers which
2658 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2659 * These controllers use actual number of transferred bytes to
2660 * update DMA poitner and transfer of 4n+2 bytes make those
2661 * controller push DMA pointer by 4n+4 bytes because SATA data
2662 * FISes are aligned to 4 bytes. This causes data corruption
2663 * and buffer overrun.
2665 * Always setting nbytes to even number solves this problem
2666 * because then ATAPI devices don't have to split data at 2n
2672 qc
->tf
.lbam
= (nbytes
& 0xFF);
2673 qc
->tf
.lbah
= (nbytes
>> 8);
2676 qc
->tf
.protocol
= ATAPI_PROT_NODATA
;
2678 qc
->tf
.protocol
= ATAPI_PROT_PIO
;
2681 qc
->tf
.protocol
= ATAPI_PROT_DMA
;
2682 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
2684 if ((dev
->flags
& ATA_DFLAG_DMADIR
) &&
2685 (scmd
->sc_data_direction
!= DMA_TO_DEVICE
))
2686 /* some SATA bridges need us to indicate data xfer direction */
2687 qc
->tf
.feature
|= ATAPI_DMADIR
;
2694 static struct ata_device
*ata_find_dev(struct ata_port
*ap
, int devno
)
2696 if (!sata_pmp_attached(ap
)) {
2697 if (likely(devno
< ata_link_max_devices(&ap
->link
)))
2698 return &ap
->link
.device
[devno
];
2700 if (likely(devno
< ap
->nr_pmp_links
))
2701 return &ap
->pmp_link
[devno
].device
[0];
2707 static struct ata_device
*__ata_scsi_find_dev(struct ata_port
*ap
,
2708 const struct scsi_device
*scsidev
)
2712 /* skip commands not addressed to targets we simulate */
2713 if (!sata_pmp_attached(ap
)) {
2714 if (unlikely(scsidev
->channel
|| scsidev
->lun
))
2716 devno
= scsidev
->id
;
2718 if (unlikely(scsidev
->id
|| scsidev
->lun
))
2720 devno
= scsidev
->channel
;
2723 return ata_find_dev(ap
, devno
);
2727 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2728 * @ap: ATA port to which the device is attached
2729 * @scsidev: SCSI device from which we derive the ATA device
2731 * Given various information provided in struct scsi_cmnd,
2732 * map that onto an ATA bus, and using that mapping
2733 * determine which ata_device is associated with the
2734 * SCSI command to be sent.
2737 * spin_lock_irqsave(host lock)
2740 * Associated ATA device, or %NULL if not found.
2742 static struct ata_device
*
2743 ata_scsi_find_dev(struct ata_port
*ap
, const struct scsi_device
*scsidev
)
2745 struct ata_device
*dev
= __ata_scsi_find_dev(ap
, scsidev
);
2747 if (unlikely(!dev
|| !ata_dev_enabled(dev
)))
2754 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2755 * @byte1: Byte 1 from pass-thru CDB.
2758 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2761 ata_scsi_map_proto(u8 byte1
)
2763 switch((byte1
& 0x1e) >> 1) {
2764 case 3: /* Non-data */
2765 return ATA_PROT_NODATA
;
2768 case 10: /* UDMA Data-in */
2769 case 11: /* UDMA Data-Out */
2770 return ATA_PROT_DMA
;
2772 case 4: /* PIO Data-in */
2773 case 5: /* PIO Data-out */
2774 return ATA_PROT_PIO
;
2776 case 0: /* Hard Reset */
2778 case 8: /* Device Diagnostic */
2779 case 9: /* Device Reset */
2780 case 7: /* DMA Queued */
2781 case 12: /* FPDMA */
2782 case 15: /* Return Response Info */
2783 default: /* Reserved */
2787 return ATA_PROT_UNKNOWN
;
2791 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2792 * @qc: command structure to be initialized
2794 * Handles either 12 or 16-byte versions of the CDB.
2797 * Zero on success, non-zero on failure.
2799 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd
*qc
)
2801 struct ata_taskfile
*tf
= &(qc
->tf
);
2802 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
2803 struct ata_device
*dev
= qc
->dev
;
2804 const u8
*cdb
= scmd
->cmnd
;
2806 if ((tf
->protocol
= ata_scsi_map_proto(cdb
[1])) == ATA_PROT_UNKNOWN
)
2810 * 12 and 16 byte CDBs use different offsets to
2811 * provide the various register values.
2813 if (cdb
[0] == ATA_16
) {
2815 * 16-byte CDB - may contain extended commands.
2817 * If that is the case, copy the upper byte register values.
2819 if (cdb
[1] & 0x01) {
2820 tf
->hob_feature
= cdb
[3];
2821 tf
->hob_nsect
= cdb
[5];
2822 tf
->hob_lbal
= cdb
[7];
2823 tf
->hob_lbam
= cdb
[9];
2824 tf
->hob_lbah
= cdb
[11];
2825 tf
->flags
|= ATA_TFLAG_LBA48
;
2827 tf
->flags
&= ~ATA_TFLAG_LBA48
;
2830 * Always copy low byte, device and command registers.
2832 tf
->feature
= cdb
[4];
2837 tf
->device
= cdb
[13];
2838 tf
->command
= cdb
[14];
2841 * 12-byte CDB - incapable of extended commands.
2843 tf
->flags
&= ~ATA_TFLAG_LBA48
;
2845 tf
->feature
= cdb
[3];
2850 tf
->device
= cdb
[8];
2851 tf
->command
= cdb
[9];
2854 /* enforce correct master/slave bit */
2855 tf
->device
= dev
->devno
?
2856 tf
->device
| ATA_DEV1
: tf
->device
& ~ATA_DEV1
;
2858 /* READ/WRITE LONG use a non-standard sect_size */
2859 qc
->sect_size
= ATA_SECT_SIZE
;
2860 switch (tf
->command
) {
2861 case ATA_CMD_READ_LONG
:
2862 case ATA_CMD_READ_LONG_ONCE
:
2863 case ATA_CMD_WRITE_LONG
:
2864 case ATA_CMD_WRITE_LONG_ONCE
:
2865 if (tf
->protocol
!= ATA_PROT_PIO
|| tf
->nsect
!= 1)
2867 qc
->sect_size
= scsi_bufflen(scmd
);
2871 * Set flags so that all registers will be written, pass on
2872 * write indication (used for PIO/DMA setup), result TF is
2873 * copied back and we don't whine too much about its failure.
2875 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2876 if (scmd
->sc_data_direction
== DMA_TO_DEVICE
)
2877 tf
->flags
|= ATA_TFLAG_WRITE
;
2879 qc
->flags
|= ATA_QCFLAG_RESULT_TF
| ATA_QCFLAG_QUIET
;
2882 * Set transfer length.
2884 * TODO: find out if we need to do more here to
2885 * cover scatter/gather case.
2887 ata_qc_set_pc_nbytes(qc
);
2889 /* We may not issue DMA commands if no DMA mode is set */
2890 if (tf
->protocol
== ATA_PROT_DMA
&& dev
->dma_mode
== 0)
2893 /* sanity check for pio multi commands */
2894 if ((cdb
[1] & 0xe0) && !is_multi_taskfile(tf
))
2897 if (is_multi_taskfile(tf
)) {
2898 unsigned int multi_count
= 1 << (cdb
[1] >> 5);
2900 /* compare the passed through multi_count
2901 * with the cached multi_count of libata
2903 if (multi_count
!= dev
->multi_count
)
2904 ata_dev_printk(dev
, KERN_WARNING
,
2905 "invalid multi_count %u ignored\n",
2910 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2911 * SET_FEATURES - XFER MODE must be preceded/succeeded
2912 * by an update to hardware-specific registers for each
2913 * controller (i.e. the reason for ->set_piomode(),
2914 * ->set_dmamode(), and ->post_set_mode() hooks).
2916 if (tf
->command
== ATA_CMD_SET_FEATURES
&&
2917 tf
->feature
== SETFEATURES_XFER
)
2921 * Filter TPM commands by default. These provide an
2922 * essentially uncontrolled encrypted "back door" between
2923 * applications and the disk. Set libata.allow_tpm=1 if you
2924 * have a real reason for wanting to use them. This ensures
2925 * that installed software cannot easily mess stuff up without
2926 * user intent. DVR type users will probably ship with this enabled
2927 * for movie content management.
2929 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
2930 * for this and should do in future but that it is not sufficient as
2931 * DCS is an optional feature set. Thus we also do the software filter
2932 * so that we comply with the TC consortium stated goal that the user
2933 * can turn off TC features of their system.
2935 if (tf
->command
>= 0x5C && tf
->command
<= 0x5F && !libata_allow_tpm
)
2941 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x00);
2942 /* "Invalid field in cdb" */
2946 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd
*qc
)
2948 struct ata_taskfile
*tf
= &qc
->tf
;
2949 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
2950 struct ata_device
*dev
= qc
->dev
;
2951 const u8
*cdb
= scmd
->cmnd
;
2957 /* we may not issue DMA commands if no DMA mode is set */
2958 if (unlikely(!dev
->dma_mode
))
2961 if (unlikely(scmd
->cmd_len
< 16))
2963 scsi_16_lba_len(cdb
, &block
, &n_block
);
2965 /* for now we only support WRITE SAME with the unmap bit set */
2966 if (unlikely(!(cdb
[1] & 0x8)))
2970 * WRITE SAME always has a sector sized buffer as payload, this
2971 * should never be a multiple entry S/G list.
2973 if (!scsi_sg_count(scmd
))
2976 buf
= page_address(sg_page(scsi_sglist(scmd
)));
2977 size
= ata_set_lba_range_entries(buf
, 512, block
, n_block
);
2979 tf
->protocol
= ATA_PROT_DMA
;
2980 tf
->hob_feature
= 0;
2981 tf
->feature
= ATA_DSM_TRIM
;
2982 tf
->hob_nsect
= (size
/ 512) >> 8;
2983 tf
->nsect
= size
/ 512;
2984 tf
->command
= ATA_CMD_DSM
;
2985 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_LBA48
|
2988 ata_qc_set_pc_nbytes(qc
);
2993 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x00);
2994 /* "Invalid field in cdb" */
2999 * ata_get_xlat_func - check if SCSI to ATA translation is possible
3001 * @cmd: SCSI command opcode to consider
3003 * Look up the SCSI command given, and determine whether the
3004 * SCSI command is to be translated or simulated.
3007 * Pointer to translation function if possible, %NULL if not.
3010 static inline ata_xlat_func_t
ata_get_xlat_func(struct ata_device
*dev
, u8 cmd
)
3020 return ata_scsi_rw_xlat
;
3023 return ata_scsi_write_same_xlat
;
3025 case SYNCHRONIZE_CACHE
:
3026 if (ata_try_flush_cache(dev
))
3027 return ata_scsi_flush_xlat
;
3032 return ata_scsi_verify_xlat
;
3036 return ata_scsi_pass_thru
;
3039 return ata_scsi_start_stop_xlat
;
3046 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
3047 * @ap: ATA port to which the command was being sent
3048 * @cmd: SCSI command to dump
3050 * Prints the contents of a SCSI command via printk().
3053 static inline void ata_scsi_dump_cdb(struct ata_port
*ap
,
3054 struct scsi_cmnd
*cmd
)
3057 struct scsi_device
*scsidev
= cmd
->device
;
3058 u8
*scsicmd
= cmd
->cmnd
;
3060 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
3062 scsidev
->channel
, scsidev
->id
, scsidev
->lun
,
3063 scsicmd
[0], scsicmd
[1], scsicmd
[2], scsicmd
[3],
3064 scsicmd
[4], scsicmd
[5], scsicmd
[6], scsicmd
[7],
3069 static inline int __ata_scsi_queuecmd(struct scsi_cmnd
*scmd
,
3070 void (*done
)(struct scsi_cmnd
*),
3071 struct ata_device
*dev
)
3073 u8 scsi_op
= scmd
->cmnd
[0];
3074 ata_xlat_func_t xlat_func
;
3077 if (dev
->class == ATA_DEV_ATA
) {
3078 if (unlikely(!scmd
->cmd_len
|| scmd
->cmd_len
> dev
->cdb_len
))
3081 xlat_func
= ata_get_xlat_func(dev
, scsi_op
);
3083 if (unlikely(!scmd
->cmd_len
))
3087 if (likely((scsi_op
!= ATA_16
) || !atapi_passthru16
)) {
3088 /* relay SCSI command to ATAPI device */
3089 int len
= COMMAND_SIZE(scsi_op
);
3090 if (unlikely(len
> scmd
->cmd_len
|| len
> dev
->cdb_len
))
3093 xlat_func
= atapi_xlat
;
3095 /* ATA_16 passthru, treat as an ATA command */
3096 if (unlikely(scmd
->cmd_len
> 16))
3099 xlat_func
= ata_get_xlat_func(dev
, scsi_op
);
3104 rc
= ata_scsi_translate(dev
, scmd
, done
, xlat_func
);
3106 ata_scsi_simulate(dev
, scmd
, done
);
3111 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
3112 scmd
->cmd_len
, scsi_op
, dev
->cdb_len
);
3113 scmd
->result
= DID_ERROR
<< 16;
3119 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
3120 * @cmd: SCSI command to be sent
3121 * @done: Completion function, called when command is complete
3123 * In some cases, this function translates SCSI commands into
3124 * ATA taskfiles, and queues the taskfiles to be sent to
3125 * hardware. In other cases, this function simulates a
3126 * SCSI device by evaluating and responding to certain
3127 * SCSI commands. This creates the overall effect of
3128 * ATA and ATAPI devices appearing as SCSI devices.
3131 * Releases scsi-layer-held lock, and obtains host lock.
3134 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3137 int ata_scsi_queuecmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*))
3139 struct ata_port
*ap
;
3140 struct ata_device
*dev
;
3141 struct scsi_device
*scsidev
= cmd
->device
;
3142 struct Scsi_Host
*shost
= scsidev
->host
;
3145 ap
= ata_shost_to_port(shost
);
3147 spin_unlock(shost
->host_lock
);
3148 spin_lock(ap
->lock
);
3150 ata_scsi_dump_cdb(ap
, cmd
);
3152 dev
= ata_scsi_find_dev(ap
, scsidev
);
3154 rc
= __ata_scsi_queuecmd(cmd
, done
, dev
);
3156 cmd
->result
= (DID_BAD_TARGET
<< 16);
3160 spin_unlock(ap
->lock
);
3161 spin_lock(shost
->host_lock
);
3166 * ata_scsi_simulate - simulate SCSI command on ATA device
3167 * @dev: the target device
3168 * @cmd: SCSI command being sent to device.
3169 * @done: SCSI command completion function.
3171 * Interprets and directly executes a select list of SCSI commands
3172 * that can be handled internally.
3175 * spin_lock_irqsave(host lock)
3178 void ata_scsi_simulate(struct ata_device
*dev
, struct scsi_cmnd
*cmd
,
3179 void (*done
)(struct scsi_cmnd
*))
3181 struct ata_scsi_args args
;
3182 const u8
*scsicmd
= cmd
->cmnd
;
3190 switch(scsicmd
[0]) {
3191 /* TODO: worth improving? */
3193 ata_scsi_invalid_field(cmd
, done
);
3197 if (scsicmd
[1] & 2) /* is CmdDt set? */
3198 ata_scsi_invalid_field(cmd
, done
);
3199 else if ((scsicmd
[1] & 1) == 0) /* is EVPD clear? */
3200 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_std
);
3201 else switch (scsicmd
[2]) {
3203 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_00
);
3206 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_80
);
3209 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_83
);
3212 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_89
);
3215 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_b0
);
3218 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_b1
);
3221 ata_scsi_invalid_field(cmd
, done
);
3228 ata_scsi_rbuf_fill(&args
, ata_scsiop_mode_sense
);
3231 case MODE_SELECT
: /* unconditionally return */
3232 case MODE_SELECT_10
: /* bad-field-in-cdb */
3233 ata_scsi_invalid_field(cmd
, done
);
3237 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
3240 case SERVICE_ACTION_IN
:
3241 if ((scsicmd
[1] & 0x1f) == SAI_READ_CAPACITY_16
)
3242 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
3244 ata_scsi_invalid_field(cmd
, done
);
3248 ata_scsi_rbuf_fill(&args
, ata_scsiop_report_luns
);
3252 ata_scsi_set_sense(cmd
, 0, 0, 0);
3253 cmd
->result
= (DRIVER_SENSE
<< 24);
3257 /* if we reach this, then writeback caching is disabled,
3258 * turning this into a no-op.
3260 case SYNCHRONIZE_CACHE
:
3263 /* no-op's, complete with success */
3267 case TEST_UNIT_READY
:
3268 ata_scsi_rbuf_fill(&args
, ata_scsiop_noop
);
3271 case SEND_DIAGNOSTIC
:
3272 tmp8
= scsicmd
[1] & ~(1 << 3);
3273 if ((tmp8
== 0x4) && (!scsicmd
[3]) && (!scsicmd
[4]))
3274 ata_scsi_rbuf_fill(&args
, ata_scsiop_noop
);
3276 ata_scsi_invalid_field(cmd
, done
);
3279 /* all other commands */
3281 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, 0x20, 0x0);
3282 /* "Invalid command operation code" */
3288 int ata_scsi_add_hosts(struct ata_host
*host
, struct scsi_host_template
*sht
)
3292 for (i
= 0; i
< host
->n_ports
; i
++) {
3293 struct ata_port
*ap
= host
->ports
[i
];
3294 struct Scsi_Host
*shost
;
3297 shost
= scsi_host_alloc(sht
, sizeof(struct ata_port
*));
3301 *(struct ata_port
**)&shost
->hostdata
[0] = ap
;
3302 ap
->scsi_host
= shost
;
3304 shost
->transportt
= &ata_scsi_transport_template
;
3305 shost
->unique_id
= ap
->print_id
;
3308 shost
->max_channel
= 1;
3309 shost
->max_cmd_len
= 16;
3311 /* Schedule policy is determined by ->qc_defer()
3312 * callback and it needs to see every deferred qc.
3313 * Set host_blocked to 1 to prevent SCSI midlayer from
3314 * automatically deferring requests.
3316 shost
->max_host_blocked
= 1;
3318 rc
= scsi_add_host(ap
->scsi_host
, ap
->host
->dev
);
3326 scsi_host_put(host
->ports
[i
]->scsi_host
);
3329 struct Scsi_Host
*shost
= host
->ports
[i
]->scsi_host
;
3331 scsi_remove_host(shost
);
3332 scsi_host_put(shost
);
3337 void ata_scsi_scan_host(struct ata_port
*ap
, int sync
)
3340 struct ata_device
*last_failed_dev
= NULL
;
3341 struct ata_link
*link
;
3342 struct ata_device
*dev
;
3345 ata_for_each_link(link
, ap
, EDGE
) {
3346 ata_for_each_dev(dev
, link
, ENABLED
) {
3347 struct scsi_device
*sdev
;
3348 int channel
= 0, id
= 0;
3353 if (ata_is_host_link(link
))
3356 channel
= link
->pmp
;
3358 sdev
= __scsi_add_device(ap
->scsi_host
, channel
, id
, 0,
3360 if (!IS_ERR(sdev
)) {
3362 scsi_device_put(sdev
);
3367 /* If we scanned while EH was in progress or allocation
3368 * failure occurred, scan would have failed silently. Check
3369 * whether all devices are attached.
3371 ata_for_each_link(link
, ap
, EDGE
) {
3372 ata_for_each_dev(dev
, link
, ENABLED
) {
3381 /* we're missing some SCSI devices */
3383 /* If caller requested synchrnous scan && we've made
3384 * any progress, sleep briefly and repeat.
3386 if (dev
!= last_failed_dev
) {
3388 last_failed_dev
= dev
;
3392 /* We might be failing to detect boot device, give it
3393 * a few more chances.
3400 ata_port_printk(ap
, KERN_ERR
, "WARNING: synchronous SCSI scan "
3401 "failed without making any progress,\n"
3402 " switching to async\n");
3405 queue_delayed_work(system_long_wq
, &ap
->hotplug_task
,
3406 round_jiffies_relative(HZ
));
3410 * ata_scsi_offline_dev - offline attached SCSI device
3411 * @dev: ATA device to offline attached SCSI device for
3413 * This function is called from ata_eh_hotplug() and responsible
3414 * for taking the SCSI device attached to @dev offline. This
3415 * function is called with host lock which protects dev->sdev
3419 * spin_lock_irqsave(host lock)
3422 * 1 if attached SCSI device exists, 0 otherwise.
3424 int ata_scsi_offline_dev(struct ata_device
*dev
)
3427 scsi_device_set_state(dev
->sdev
, SDEV_OFFLINE
);
3434 * ata_scsi_remove_dev - remove attached SCSI device
3435 * @dev: ATA device to remove attached SCSI device for
3437 * This function is called from ata_eh_scsi_hotplug() and
3438 * responsible for removing the SCSI device attached to @dev.
3441 * Kernel thread context (may sleep).
3443 static void ata_scsi_remove_dev(struct ata_device
*dev
)
3445 struct ata_port
*ap
= dev
->link
->ap
;
3446 struct scsi_device
*sdev
;
3447 unsigned long flags
;
3449 /* Alas, we need to grab scan_mutex to ensure SCSI device
3450 * state doesn't change underneath us and thus
3451 * scsi_device_get() always succeeds. The mutex locking can
3452 * be removed if there is __scsi_device_get() interface which
3453 * increments reference counts regardless of device state.
3455 mutex_lock(&ap
->scsi_host
->scan_mutex
);
3456 spin_lock_irqsave(ap
->lock
, flags
);
3458 /* clearing dev->sdev is protected by host lock */
3463 /* If user initiated unplug races with us, sdev can go
3464 * away underneath us after the host lock and
3465 * scan_mutex are released. Hold onto it.
3467 if (scsi_device_get(sdev
) == 0) {
3468 /* The following ensures the attached sdev is
3469 * offline on return from ata_scsi_offline_dev()
3470 * regardless it wins or loses the race
3471 * against this function.
3473 scsi_device_set_state(sdev
, SDEV_OFFLINE
);
3480 spin_unlock_irqrestore(ap
->lock
, flags
);
3481 mutex_unlock(&ap
->scsi_host
->scan_mutex
);
3484 ata_dev_printk(dev
, KERN_INFO
, "detaching (SCSI %s)\n",
3485 dev_name(&sdev
->sdev_gendev
));
3487 scsi_remove_device(sdev
);
3488 scsi_device_put(sdev
);
3492 static void ata_scsi_handle_link_detach(struct ata_link
*link
)
3494 struct ata_port
*ap
= link
->ap
;
3495 struct ata_device
*dev
;
3497 ata_for_each_dev(dev
, link
, ALL
) {
3498 unsigned long flags
;
3500 if (!(dev
->flags
& ATA_DFLAG_DETACHED
))
3503 spin_lock_irqsave(ap
->lock
, flags
);
3504 dev
->flags
&= ~ATA_DFLAG_DETACHED
;
3505 spin_unlock_irqrestore(ap
->lock
, flags
);
3507 ata_scsi_remove_dev(dev
);
3512 * ata_scsi_media_change_notify - send media change event
3513 * @dev: Pointer to the disk device with media change event
3515 * Tell the block layer to send a media change notification
3519 * spin_lock_irqsave(host lock)
3521 void ata_scsi_media_change_notify(struct ata_device
*dev
)
3524 sdev_evt_send_simple(dev
->sdev
, SDEV_EVT_MEDIA_CHANGE
,
3529 * ata_scsi_hotplug - SCSI part of hotplug
3530 * @work: Pointer to ATA port to perform SCSI hotplug on
3532 * Perform SCSI part of hotplug. It's executed from a separate
3533 * workqueue after EH completes. This is necessary because SCSI
3534 * hot plugging requires working EH and hot unplugging is
3535 * synchronized with hot plugging with a mutex.
3538 * Kernel thread context (may sleep).
3540 void ata_scsi_hotplug(struct work_struct
*work
)
3542 struct ata_port
*ap
=
3543 container_of(work
, struct ata_port
, hotplug_task
.work
);
3546 if (ap
->pflags
& ATA_PFLAG_UNLOADING
) {
3547 DPRINTK("ENTER/EXIT - unloading\n");
3552 mutex_lock(&ap
->scsi_scan_mutex
);
3554 /* Unplug detached devices. We cannot use link iterator here
3555 * because PMP links have to be scanned even if PMP is
3556 * currently not attached. Iterate manually.
3558 ata_scsi_handle_link_detach(&ap
->link
);
3560 for (i
= 0; i
< SATA_PMP_MAX_PORTS
; i
++)
3561 ata_scsi_handle_link_detach(&ap
->pmp_link
[i
]);
3563 /* scan for new ones */
3564 ata_scsi_scan_host(ap
, 0);
3566 mutex_unlock(&ap
->scsi_scan_mutex
);
3571 * ata_scsi_user_scan - indication for user-initiated bus scan
3572 * @shost: SCSI host to scan
3573 * @channel: Channel to scan
3577 * This function is called when user explicitly requests bus
3578 * scan. Set probe pending flag and invoke EH.
3581 * SCSI layer (we don't care)
3586 static int ata_scsi_user_scan(struct Scsi_Host
*shost
, unsigned int channel
,
3587 unsigned int id
, unsigned int lun
)
3589 struct ata_port
*ap
= ata_shost_to_port(shost
);
3590 unsigned long flags
;
3593 if (!ap
->ops
->error_handler
)
3596 if (lun
!= SCAN_WILD_CARD
&& lun
)
3599 if (!sata_pmp_attached(ap
)) {
3600 if (channel
!= SCAN_WILD_CARD
&& channel
)
3604 if (id
!= SCAN_WILD_CARD
&& id
)
3609 spin_lock_irqsave(ap
->lock
, flags
);
3611 if (devno
== SCAN_WILD_CARD
) {
3612 struct ata_link
*link
;
3614 ata_for_each_link(link
, ap
, EDGE
) {
3615 struct ata_eh_info
*ehi
= &link
->eh_info
;
3616 ehi
->probe_mask
|= ATA_ALL_DEVICES
;
3617 ehi
->action
|= ATA_EH_RESET
;
3620 struct ata_device
*dev
= ata_find_dev(ap
, devno
);
3623 struct ata_eh_info
*ehi
= &dev
->link
->eh_info
;
3624 ehi
->probe_mask
|= 1 << dev
->devno
;
3625 ehi
->action
|= ATA_EH_RESET
;
3631 ata_port_schedule_eh(ap
);
3632 spin_unlock_irqrestore(ap
->lock
, flags
);
3633 ata_port_wait_eh(ap
);
3635 spin_unlock_irqrestore(ap
->lock
, flags
);
3641 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
3642 * @work: Pointer to ATA port to perform scsi_rescan_device()
3644 * After ATA pass thru (SAT) commands are executed successfully,
3645 * libata need to propagate the changes to SCSI layer.
3648 * Kernel thread context (may sleep).
3650 void ata_scsi_dev_rescan(struct work_struct
*work
)
3652 struct ata_port
*ap
=
3653 container_of(work
, struct ata_port
, scsi_rescan_task
);
3654 struct ata_link
*link
;
3655 struct ata_device
*dev
;
3656 unsigned long flags
;
3658 mutex_lock(&ap
->scsi_scan_mutex
);
3659 spin_lock_irqsave(ap
->lock
, flags
);
3661 ata_for_each_link(link
, ap
, EDGE
) {
3662 ata_for_each_dev(dev
, link
, ENABLED
) {
3663 struct scsi_device
*sdev
= dev
->sdev
;
3667 if (scsi_device_get(sdev
))
3670 spin_unlock_irqrestore(ap
->lock
, flags
);
3671 scsi_rescan_device(&(sdev
->sdev_gendev
));
3672 scsi_device_put(sdev
);
3673 spin_lock_irqsave(ap
->lock
, flags
);
3677 spin_unlock_irqrestore(ap
->lock
, flags
);
3678 mutex_unlock(&ap
->scsi_scan_mutex
);
3682 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
3683 * @host: ATA host container for all SAS ports
3684 * @port_info: Information from low-level host driver
3685 * @shost: SCSI host that the scsi device is attached to
3688 * PCI/etc. bus probe sem.
3691 * ata_port pointer on success / NULL on failure.
3694 struct ata_port
*ata_sas_port_alloc(struct ata_host
*host
,
3695 struct ata_port_info
*port_info
,
3696 struct Scsi_Host
*shost
)
3698 struct ata_port
*ap
;
3700 ap
= ata_port_alloc(host
);
3705 ap
->lock
= shost
->host_lock
;
3706 ap
->pio_mask
= port_info
->pio_mask
;
3707 ap
->mwdma_mask
= port_info
->mwdma_mask
;
3708 ap
->udma_mask
= port_info
->udma_mask
;
3709 ap
->flags
|= port_info
->flags
;
3710 ap
->ops
= port_info
->port_ops
;
3711 ap
->cbl
= ATA_CBL_SATA
;
3715 EXPORT_SYMBOL_GPL(ata_sas_port_alloc
);
3718 * ata_sas_port_start - Set port up for dma.
3719 * @ap: Port to initialize
3721 * Called just after data structures for each port are
3724 * May be used as the port_start() entry in ata_port_operations.
3727 * Inherited from caller.
3729 int ata_sas_port_start(struct ata_port
*ap
)
3733 EXPORT_SYMBOL_GPL(ata_sas_port_start
);
3736 * ata_port_stop - Undo ata_sas_port_start()
3737 * @ap: Port to shut down
3739 * May be used as the port_stop() entry in ata_port_operations.
3742 * Inherited from caller.
3745 void ata_sas_port_stop(struct ata_port
*ap
)
3748 EXPORT_SYMBOL_GPL(ata_sas_port_stop
);
3751 * ata_sas_port_init - Initialize a SATA device
3752 * @ap: SATA port to initialize
3755 * PCI/etc. bus probe sem.
3758 * Zero on success, non-zero on error.
3761 int ata_sas_port_init(struct ata_port
*ap
)
3763 int rc
= ap
->ops
->port_start(ap
);
3766 ap
->print_id
= ata_print_id
++;
3767 rc
= ata_bus_probe(ap
);
3772 EXPORT_SYMBOL_GPL(ata_sas_port_init
);
3775 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3776 * @ap: SATA port to destroy
3780 void ata_sas_port_destroy(struct ata_port
*ap
)
3782 if (ap
->ops
->port_stop
)
3783 ap
->ops
->port_stop(ap
);
3786 EXPORT_SYMBOL_GPL(ata_sas_port_destroy
);
3789 * ata_sas_slave_configure - Default slave_config routine for libata devices
3790 * @sdev: SCSI device to configure
3791 * @ap: ATA port to which SCSI device is attached
3797 int ata_sas_slave_configure(struct scsi_device
*sdev
, struct ata_port
*ap
)
3799 ata_scsi_sdev_config(sdev
);
3800 ata_scsi_dev_config(sdev
, ap
->link
.device
);
3803 EXPORT_SYMBOL_GPL(ata_sas_slave_configure
);
3806 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3807 * @cmd: SCSI command to be sent
3808 * @done: Completion function, called when command is complete
3809 * @ap: ATA port to which the command is being sent
3812 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3816 int ata_sas_queuecmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*),
3817 struct ata_port
*ap
)
3821 ata_scsi_dump_cdb(ap
, cmd
);
3823 if (likely(ata_dev_enabled(ap
->link
.device
)))
3824 rc
= __ata_scsi_queuecmd(cmd
, done
, ap
->link
.device
);
3826 cmd
->result
= (DID_BAD_TARGET
<< 16);
3831 EXPORT_SYMBOL_GPL(ata_sas_queuecmd
);