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/kernel.h>
37 #include <linux/blkdev.h>
38 #include <linux/spinlock.h>
39 #include <scsi/scsi.h>
40 #include <scsi/scsi_host.h>
41 #include <scsi/scsi_cmnd.h>
42 #include <scsi/scsi_eh.h>
43 #include <scsi/scsi_device.h>
44 #include <scsi/scsi_tcq.h>
45 #include <scsi/scsi_transport.h>
46 #include <linux/libata.h>
47 #include <linux/hdreg.h>
48 #include <linux/uaccess.h>
52 #define SECTOR_SIZE 512
53 #define ATA_SCSI_RBUF_SIZE 4096
55 static DEFINE_SPINLOCK(ata_scsi_rbuf_lock
);
56 static u8 ata_scsi_rbuf
[ATA_SCSI_RBUF_SIZE
];
58 typedef unsigned int (*ata_xlat_func_t
)(struct ata_queued_cmd
*qc
);
60 static struct ata_device
*__ata_scsi_find_dev(struct ata_port
*ap
,
61 const struct scsi_device
*scsidev
);
62 static struct ata_device
*ata_scsi_find_dev(struct ata_port
*ap
,
63 const struct scsi_device
*scsidev
);
64 static int ata_scsi_user_scan(struct Scsi_Host
*shost
, unsigned int channel
,
65 unsigned int id
, unsigned int lun
);
68 #define RW_RECOVERY_MPAGE 0x1
69 #define RW_RECOVERY_MPAGE_LEN 12
70 #define CACHE_MPAGE 0x8
71 #define CACHE_MPAGE_LEN 20
72 #define CONTROL_MPAGE 0xa
73 #define CONTROL_MPAGE_LEN 12
74 #define ALL_MPAGES 0x3f
75 #define ALL_SUB_MPAGES 0xff
78 static const u8 def_rw_recovery_mpage
[RW_RECOVERY_MPAGE_LEN
] = {
80 RW_RECOVERY_MPAGE_LEN
- 2,
82 0, /* read retry count */
84 0, /* write retry count */
88 static const u8 def_cache_mpage
[CACHE_MPAGE_LEN
] = {
91 0, /* contains WCE, needs to be 0 for logic */
92 0, 0, 0, 0, 0, 0, 0, 0, 0,
93 0, /* contains DRA, needs to be 0 for logic */
97 static const u8 def_control_mpage
[CONTROL_MPAGE_LEN
] = {
99 CONTROL_MPAGE_LEN
- 2,
100 2, /* DSENSE=0, GLTSD=1 */
101 0, /* [QAM+QERR may be 1, see 05-359r1] */
102 0, 0, 0, 0, 0xff, 0xff,
103 0, 30 /* extended self test time, see 05-359r1 */
107 * libata transport template. libata doesn't do real transport stuff.
108 * It just needs the eh_timed_out hook.
110 static struct scsi_transport_template ata_scsi_transport_template
= {
111 .eh_strategy_handler
= ata_scsi_error
,
112 .eh_timed_out
= ata_scsi_timed_out
,
113 .user_scan
= ata_scsi_user_scan
,
117 static const struct {
120 } link_pm_policy
[] = {
121 { NOT_AVAILABLE
, "max_performance" },
122 { MIN_POWER
, "min_power" },
123 { MAX_PERFORMANCE
, "max_performance" },
124 { MEDIUM_POWER
, "medium_power" },
127 static const char *ata_scsi_lpm_get(enum link_pm policy
)
131 for (i
= 0; i
< ARRAY_SIZE(link_pm_policy
); i
++)
132 if (link_pm_policy
[i
].value
== policy
)
133 return link_pm_policy
[i
].name
;
138 static ssize_t
ata_scsi_lpm_put(struct device
*dev
,
139 struct device_attribute
*attr
,
140 const char *buf
, size_t count
)
142 struct Scsi_Host
*shost
= class_to_shost(dev
);
143 struct ata_port
*ap
= ata_shost_to_port(shost
);
144 enum link_pm policy
= 0;
148 * we are skipping array location 0 on purpose - this
149 * is because a value of NOT_AVAILABLE is displayed
150 * to the user as max_performance, but when the user
151 * writes "max_performance", they actually want the
152 * value to match MAX_PERFORMANCE.
154 for (i
= 1; i
< ARRAY_SIZE(link_pm_policy
); i
++) {
155 const int len
= strlen(link_pm_policy
[i
].name
);
156 if (strncmp(link_pm_policy
[i
].name
, buf
, len
) == 0 &&
158 policy
= link_pm_policy
[i
].value
;
165 ata_lpm_schedule(ap
, policy
);
170 ata_scsi_lpm_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
172 struct Scsi_Host
*shost
= class_to_shost(dev
);
173 struct ata_port
*ap
= ata_shost_to_port(shost
);
175 ata_scsi_lpm_get(ap
->pm_policy
);
180 return snprintf(buf
, 23, "%s\n", policy
);
182 DEVICE_ATTR(link_power_management_policy
, S_IRUGO
| S_IWUSR
,
183 ata_scsi_lpm_show
, ata_scsi_lpm_put
);
184 EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy
);
186 static ssize_t
ata_scsi_park_show(struct device
*device
,
187 struct device_attribute
*attr
, char *buf
)
189 struct scsi_device
*sdev
= to_scsi_device(device
);
191 struct ata_link
*link
;
192 struct ata_device
*dev
;
194 unsigned int uninitialized_var(msecs
);
197 ap
= ata_shost_to_port(sdev
->host
);
199 spin_lock_irqsave(ap
->lock
, flags
);
200 dev
= ata_scsi_find_dev(ap
, sdev
);
205 if (dev
->flags
& ATA_DFLAG_NO_UNLOAD
) {
211 if (ap
->pflags
& ATA_PFLAG_EH_IN_PROGRESS
&&
212 link
->eh_context
.unloaded_mask
& (1 << dev
->devno
) &&
213 time_after(dev
->unpark_deadline
, jiffies
))
214 msecs
= jiffies_to_msecs(dev
->unpark_deadline
- jiffies
);
219 spin_unlock_irq(ap
->lock
);
221 return rc
? rc
: snprintf(buf
, 20, "%u\n", msecs
);
224 static ssize_t
ata_scsi_park_store(struct device
*device
,
225 struct device_attribute
*attr
,
226 const char *buf
, size_t len
)
228 struct scsi_device
*sdev
= to_scsi_device(device
);
230 struct ata_device
*dev
;
235 rc
= strict_strtol(buf
, 10, &input
);
236 if (rc
|| input
< -2)
238 if (input
> ATA_TMOUT_MAX_PARK
) {
240 input
= ATA_TMOUT_MAX_PARK
;
243 ap
= ata_shost_to_port(sdev
->host
);
245 spin_lock_irqsave(ap
->lock
, flags
);
246 dev
= ata_scsi_find_dev(ap
, sdev
);
247 if (unlikely(!dev
)) {
251 if (dev
->class != ATA_DEV_ATA
) {
257 if (dev
->flags
& ATA_DFLAG_NO_UNLOAD
) {
262 dev
->unpark_deadline
= ata_deadline(jiffies
, input
);
263 dev
->link
->eh_info
.dev_action
[dev
->devno
] |= ATA_EH_PARK
;
264 ata_port_schedule_eh(ap
);
265 complete(&ap
->park_req_pending
);
269 dev
->flags
&= ~ATA_DFLAG_NO_UNLOAD
;
272 dev
->flags
|= ATA_DFLAG_NO_UNLOAD
;
277 spin_unlock_irqrestore(ap
->lock
, flags
);
279 return rc
? rc
: len
;
281 DEVICE_ATTR(unload_heads
, S_IRUGO
| S_IWUSR
,
282 ata_scsi_park_show
, ata_scsi_park_store
);
283 EXPORT_SYMBOL_GPL(dev_attr_unload_heads
);
285 static void ata_scsi_set_sense(struct scsi_cmnd
*cmd
, u8 sk
, u8 asc
, u8 ascq
)
287 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
289 scsi_build_sense_buffer(0, cmd
->sense_buffer
, sk
, asc
, ascq
);
293 ata_scsi_em_message_store(struct device
*dev
, struct device_attribute
*attr
,
294 const char *buf
, size_t count
)
296 struct Scsi_Host
*shost
= class_to_shost(dev
);
297 struct ata_port
*ap
= ata_shost_to_port(shost
);
298 if (ap
->ops
->em_store
&& (ap
->flags
& ATA_FLAG_EM
))
299 return ap
->ops
->em_store(ap
, buf
, count
);
304 ata_scsi_em_message_show(struct device
*dev
, struct device_attribute
*attr
,
307 struct Scsi_Host
*shost
= class_to_shost(dev
);
308 struct ata_port
*ap
= ata_shost_to_port(shost
);
310 if (ap
->ops
->em_show
&& (ap
->flags
& ATA_FLAG_EM
))
311 return ap
->ops
->em_show(ap
, buf
);
314 DEVICE_ATTR(em_message
, S_IRUGO
| S_IWUGO
,
315 ata_scsi_em_message_show
, ata_scsi_em_message_store
);
316 EXPORT_SYMBOL_GPL(dev_attr_em_message
);
319 ata_scsi_em_message_type_show(struct device
*dev
, struct device_attribute
*attr
,
322 struct Scsi_Host
*shost
= class_to_shost(dev
);
323 struct ata_port
*ap
= ata_shost_to_port(shost
);
325 return snprintf(buf
, 23, "%d\n", ap
->em_message_type
);
327 DEVICE_ATTR(em_message_type
, S_IRUGO
,
328 ata_scsi_em_message_type_show
, NULL
);
329 EXPORT_SYMBOL_GPL(dev_attr_em_message_type
);
332 ata_scsi_activity_show(struct device
*dev
, struct device_attribute
*attr
,
335 struct scsi_device
*sdev
= to_scsi_device(dev
);
336 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
337 struct ata_device
*atadev
= ata_scsi_find_dev(ap
, sdev
);
339 if (ap
->ops
->sw_activity_show
&& (ap
->flags
& ATA_FLAG_SW_ACTIVITY
))
340 return ap
->ops
->sw_activity_show(atadev
, buf
);
345 ata_scsi_activity_store(struct device
*dev
, struct device_attribute
*attr
,
346 const char *buf
, size_t count
)
348 struct scsi_device
*sdev
= to_scsi_device(dev
);
349 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
350 struct ata_device
*atadev
= ata_scsi_find_dev(ap
, sdev
);
351 enum sw_activity val
;
354 if (ap
->ops
->sw_activity_store
&& (ap
->flags
& ATA_FLAG_SW_ACTIVITY
)) {
355 val
= simple_strtoul(buf
, NULL
, 0);
357 case OFF
: case BLINK_ON
: case BLINK_OFF
:
358 rc
= ap
->ops
->sw_activity_store(atadev
, val
);
367 DEVICE_ATTR(sw_activity
, S_IWUGO
| S_IRUGO
, ata_scsi_activity_show
,
368 ata_scsi_activity_store
);
369 EXPORT_SYMBOL_GPL(dev_attr_sw_activity
);
371 struct device_attribute
*ata_common_sdev_attrs
[] = {
372 &dev_attr_unload_heads
,
375 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs
);
377 static void ata_scsi_invalid_field(struct scsi_cmnd
*cmd
,
378 void (*done
)(struct scsi_cmnd
*))
380 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
381 /* "Invalid field in cbd" */
386 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
387 * @sdev: SCSI device for which BIOS geometry is to be determined
388 * @bdev: block device associated with @sdev
389 * @capacity: capacity of SCSI device
390 * @geom: location to which geometry will be output
392 * Generic bios head/sector/cylinder calculator
393 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
394 * mapping. Some situations may arise where the disk is not
395 * bootable if this is not used.
398 * Defined by the SCSI layer. We don't really care.
403 int ata_std_bios_param(struct scsi_device
*sdev
, struct block_device
*bdev
,
404 sector_t capacity
, int geom
[])
408 sector_div(capacity
, 255*63);
415 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
416 * @sdev: SCSI device to get identify data for
417 * @arg: User buffer area for identify data
420 * Defined by the SCSI layer. We don't really care.
423 * Zero on success, negative errno on error.
425 static int ata_get_identity(struct scsi_device
*sdev
, void __user
*arg
)
427 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
428 struct ata_device
*dev
= ata_scsi_find_dev(ap
, sdev
);
429 u16 __user
*dst
= arg
;
435 if (copy_to_user(dst
, dev
->id
, ATA_ID_WORDS
* sizeof(u16
)))
438 ata_id_string(dev
->id
, buf
, ATA_ID_PROD
, ATA_ID_PROD_LEN
);
439 if (copy_to_user(dst
+ ATA_ID_PROD
, buf
, ATA_ID_PROD_LEN
))
442 ata_id_string(dev
->id
, buf
, ATA_ID_FW_REV
, ATA_ID_FW_REV_LEN
);
443 if (copy_to_user(dst
+ ATA_ID_FW_REV
, buf
, ATA_ID_FW_REV_LEN
))
446 ata_id_string(dev
->id
, buf
, ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
447 if (copy_to_user(dst
+ ATA_ID_SERNO
, buf
, ATA_ID_SERNO_LEN
))
454 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
455 * @scsidev: Device to which we are issuing command
456 * @arg: User provided data for issuing command
459 * Defined by the SCSI layer. We don't really care.
462 * Zero on success, negative errno on error.
464 int ata_cmd_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
467 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
468 u8 args
[4], *argbuf
= NULL
, *sensebuf
= NULL
;
470 enum dma_data_direction data_dir
;
476 if (copy_from_user(args
, arg
, sizeof(args
)))
479 sensebuf
= kzalloc(SCSI_SENSE_BUFFERSIZE
, GFP_NOIO
);
483 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
486 argsize
= SECTOR_SIZE
* args
[3];
487 argbuf
= kmalloc(argsize
, GFP_KERNEL
);
488 if (argbuf
== NULL
) {
493 scsi_cmd
[1] = (4 << 1); /* PIO Data-in */
494 scsi_cmd
[2] = 0x0e; /* no off.line or cc, read from dev,
495 block count in sector count field */
496 data_dir
= DMA_FROM_DEVICE
;
498 scsi_cmd
[1] = (3 << 1); /* Non-data */
499 scsi_cmd
[2] = 0x20; /* cc but no off.line or data xfer */
503 scsi_cmd
[0] = ATA_16
;
505 scsi_cmd
[4] = args
[2];
506 if (args
[0] == ATA_CMD_SMART
) { /* hack -- ide driver does this too */
507 scsi_cmd
[6] = args
[3];
508 scsi_cmd
[8] = args
[1];
512 scsi_cmd
[6] = args
[1];
514 scsi_cmd
[14] = args
[0];
516 /* Good values for timeout and retries? Values below
517 from scsi_ioctl_send_command() for default case... */
518 cmd_result
= scsi_execute(scsidev
, scsi_cmd
, data_dir
, argbuf
, argsize
,
519 sensebuf
, (10*HZ
), 5, 0);
521 if (driver_byte(cmd_result
) == DRIVER_SENSE
) {/* sense data available */
522 u8
*desc
= sensebuf
+ 8;
523 cmd_result
&= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
525 /* If we set cc then ATA pass-through will cause a
526 * check condition even if no error. Filter that. */
527 if (cmd_result
& SAM_STAT_CHECK_CONDITION
) {
528 struct scsi_sense_hdr sshdr
;
529 scsi_normalize_sense(sensebuf
, SCSI_SENSE_BUFFERSIZE
,
531 if (sshdr
.sense_key
== 0 &&
532 sshdr
.asc
== 0 && sshdr
.ascq
== 0)
533 cmd_result
&= ~SAM_STAT_CHECK_CONDITION
;
536 /* Send userspace a few ATA registers (same as drivers/ide) */
537 if (sensebuf
[0] == 0x72 && /* format is "descriptor" */
538 desc
[0] == 0x09) { /* code is "ATA Descriptor" */
539 args
[0] = desc
[13]; /* status */
540 args
[1] = desc
[3]; /* error */
541 args
[2] = desc
[5]; /* sector count (0:7) */
542 if (copy_to_user(arg
, args
, sizeof(args
)))
554 && copy_to_user(arg
+ sizeof(args
), argbuf
, argsize
))
563 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
564 * @scsidev: Device to which we are issuing command
565 * @arg: User provided data for issuing command
568 * Defined by the SCSI layer. We don't really care.
571 * Zero on success, negative errno on error.
573 int ata_task_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
576 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
577 u8 args
[7], *sensebuf
= NULL
;
583 if (copy_from_user(args
, arg
, sizeof(args
)))
586 sensebuf
= kzalloc(SCSI_SENSE_BUFFERSIZE
, GFP_NOIO
);
590 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
591 scsi_cmd
[0] = ATA_16
;
592 scsi_cmd
[1] = (3 << 1); /* Non-data */
593 scsi_cmd
[2] = 0x20; /* cc but no off.line or data xfer */
594 scsi_cmd
[4] = args
[1];
595 scsi_cmd
[6] = args
[2];
596 scsi_cmd
[8] = args
[3];
597 scsi_cmd
[10] = args
[4];
598 scsi_cmd
[12] = args
[5];
599 scsi_cmd
[13] = args
[6] & 0x4f;
600 scsi_cmd
[14] = args
[0];
602 /* Good values for timeout and retries? Values below
603 from scsi_ioctl_send_command() for default case... */
604 cmd_result
= scsi_execute(scsidev
, scsi_cmd
, DMA_NONE
, NULL
, 0,
605 sensebuf
, (10*HZ
), 5, 0);
607 if (driver_byte(cmd_result
) == DRIVER_SENSE
) {/* sense data available */
608 u8
*desc
= sensebuf
+ 8;
609 cmd_result
&= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
611 /* If we set cc then ATA pass-through will cause a
612 * check condition even if no error. Filter that. */
613 if (cmd_result
& SAM_STAT_CHECK_CONDITION
) {
614 struct scsi_sense_hdr sshdr
;
615 scsi_normalize_sense(sensebuf
, SCSI_SENSE_BUFFERSIZE
,
617 if (sshdr
.sense_key
== 0 &&
618 sshdr
.asc
== 0 && sshdr
.ascq
== 0)
619 cmd_result
&= ~SAM_STAT_CHECK_CONDITION
;
622 /* Send userspace ATA registers */
623 if (sensebuf
[0] == 0x72 && /* format is "descriptor" */
624 desc
[0] == 0x09) {/* code is "ATA Descriptor" */
625 args
[0] = desc
[13]; /* status */
626 args
[1] = desc
[3]; /* error */
627 args
[2] = desc
[5]; /* sector count (0:7) */
628 args
[3] = desc
[7]; /* lbal */
629 args
[4] = desc
[9]; /* lbam */
630 args
[5] = desc
[11]; /* lbah */
631 args
[6] = desc
[12]; /* select */
632 if (copy_to_user(arg
, args
, sizeof(args
)))
647 int ata_scsi_ioctl(struct scsi_device
*scsidev
, int cmd
, void __user
*arg
)
649 int val
= -EINVAL
, rc
= -EINVAL
;
652 case ATA_IOC_GET_IO32
:
654 if (copy_to_user(arg
, &val
, 1))
658 case ATA_IOC_SET_IO32
:
659 val
= (unsigned long) arg
;
664 case HDIO_GET_IDENTITY
:
665 return ata_get_identity(scsidev
, arg
);
668 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
670 return ata_cmd_ioctl(scsidev
, arg
);
672 case HDIO_DRIVE_TASK
:
673 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
675 return ata_task_ioctl(scsidev
, arg
);
686 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
687 * @dev: ATA device to which the new command is attached
688 * @cmd: SCSI command that originated this ATA command
689 * @done: SCSI command completion function
691 * Obtain a reference to an unused ata_queued_cmd structure,
692 * which is the basic libata structure representing a single
693 * ATA command sent to the hardware.
695 * If a command was available, fill in the SCSI-specific
696 * portions of the structure with information on the
700 * spin_lock_irqsave(host lock)
703 * Command allocated, or %NULL if none available.
705 static struct ata_queued_cmd
*ata_scsi_qc_new(struct ata_device
*dev
,
706 struct scsi_cmnd
*cmd
,
707 void (*done
)(struct scsi_cmnd
*))
709 struct ata_queued_cmd
*qc
;
711 if (cmd
->request
->tag
!= -1)
712 qc
= ata_qc_new_init(dev
, cmd
->request
->tag
);
714 qc
= ata_qc_new_init(dev
, 0);
720 qc
->sg
= scsi_sglist(cmd
);
721 qc
->n_elem
= scsi_sg_count(cmd
);
723 cmd
->result
= (DID_OK
<< 16) | (QUEUE_FULL
<< 1);
730 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd
*qc
)
732 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
734 qc
->extrabytes
= scmd
->request
->extra_len
;
735 qc
->nbytes
= scsi_bufflen(scmd
) + qc
->extrabytes
;
739 * ata_dump_status - user friendly display of error info
740 * @id: id of the port in question
741 * @tf: ptr to filled out taskfile
743 * Decode and dump the ATA error/status registers for the user so
744 * that they have some idea what really happened at the non
745 * make-believe layer.
748 * inherited from caller
750 static void ata_dump_status(unsigned id
, struct ata_taskfile
*tf
)
752 u8 stat
= tf
->command
, err
= tf
->feature
;
754 printk(KERN_WARNING
"ata%u: status=0x%02x { ", id
, stat
);
755 if (stat
& ATA_BUSY
) {
756 printk("Busy }\n"); /* Data is not valid in this case */
758 if (stat
& 0x40) printk("DriveReady ");
759 if (stat
& 0x20) printk("DeviceFault ");
760 if (stat
& 0x10) printk("SeekComplete ");
761 if (stat
& 0x08) printk("DataRequest ");
762 if (stat
& 0x04) printk("CorrectedError ");
763 if (stat
& 0x02) printk("Index ");
764 if (stat
& 0x01) printk("Error ");
768 printk(KERN_WARNING
"ata%u: error=0x%02x { ", id
, err
);
769 if (err
& 0x04) printk("DriveStatusError ");
771 if (err
& 0x04) printk("BadCRC ");
772 else printk("Sector ");
774 if (err
& 0x40) printk("UncorrectableError ");
775 if (err
& 0x10) printk("SectorIdNotFound ");
776 if (err
& 0x02) printk("TrackZeroNotFound ");
777 if (err
& 0x01) printk("AddrMarkNotFound ");
784 * ata_to_sense_error - convert ATA error to SCSI error
785 * @id: ATA device number
786 * @drv_stat: value contained in ATA status register
787 * @drv_err: value contained in ATA error register
788 * @sk: the sense key we'll fill out
789 * @asc: the additional sense code we'll fill out
790 * @ascq: the additional sense code qualifier we'll fill out
791 * @verbose: be verbose
793 * Converts an ATA error into a SCSI error. Fill out pointers to
794 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
795 * format sense blocks.
798 * spin_lock_irqsave(host lock)
800 static void ata_to_sense_error(unsigned id
, u8 drv_stat
, u8 drv_err
, u8
*sk
,
801 u8
*asc
, u8
*ascq
, int verbose
)
805 /* Based on the 3ware driver translation table */
806 static const unsigned char sense_table
[][4] = {
808 {0xd1, ABORTED_COMMAND
, 0x00, 0x00}, // Device busy Aborted command
810 {0xd0, ABORTED_COMMAND
, 0x00, 0x00}, // Device busy Aborted command
812 {0x61, HARDWARE_ERROR
, 0x00, 0x00}, // Device fault Hardware error
813 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
814 {0x84, ABORTED_COMMAND
, 0x47, 0x00}, // Data CRC error SCSI parity error
815 /* MC|ID|ABRT|TRK0|MARK */
816 {0x37, NOT_READY
, 0x04, 0x00}, // Unit offline Not ready
818 {0x09, NOT_READY
, 0x04, 0x00}, // Unrecovered disk error Not ready
819 /* Bad address mark */
820 {0x01, MEDIUM_ERROR
, 0x13, 0x00}, // Address mark not found Address mark not found for data field
822 {0x02, HARDWARE_ERROR
, 0x00, 0x00}, // Track 0 not found Hardware error
824 {0x04, ABORTED_COMMAND
, 0x00, 0x00}, // Aborted command Aborted command
825 /* Media change request */
826 {0x08, NOT_READY
, 0x04, 0x00}, // Media change request FIXME: faking offline
828 {0x10, ABORTED_COMMAND
, 0x14, 0x00}, // ID not found Recorded entity not found
830 {0x08, NOT_READY
, 0x04, 0x00}, // Media change FIXME: faking offline
832 {0x40, MEDIUM_ERROR
, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
833 /* BBD - block marked bad */
834 {0x80, MEDIUM_ERROR
, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
835 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
837 static const unsigned char stat_table
[][4] = {
838 /* Must be first because BUSY means no other bits valid */
839 {0x80, ABORTED_COMMAND
, 0x47, 0x00}, // Busy, fake parity for now
840 {0x20, HARDWARE_ERROR
, 0x00, 0x00}, // Device fault
841 {0x08, ABORTED_COMMAND
, 0x47, 0x00}, // Timed out in xfer, fake parity for now
842 {0x04, RECOVERED_ERROR
, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
843 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
847 * Is this an error we can process/parse
849 if (drv_stat
& ATA_BUSY
) {
850 drv_err
= 0; /* Ignore the err bits, they're invalid */
854 /* Look for drv_err */
855 for (i
= 0; sense_table
[i
][0] != 0xFF; i
++) {
856 /* Look for best matches first */
857 if ((sense_table
[i
][0] & drv_err
) ==
859 *sk
= sense_table
[i
][1];
860 *asc
= sense_table
[i
][2];
861 *ascq
= sense_table
[i
][3];
865 /* No immediate match */
867 printk(KERN_WARNING
"ata%u: no sense translation for "
868 "error 0x%02x\n", id
, drv_err
);
871 /* Fall back to interpreting status bits */
872 for (i
= 0; stat_table
[i
][0] != 0xFF; i
++) {
873 if (stat_table
[i
][0] & drv_stat
) {
874 *sk
= stat_table
[i
][1];
875 *asc
= stat_table
[i
][2];
876 *ascq
= stat_table
[i
][3];
880 /* No error? Undecoded? */
882 printk(KERN_WARNING
"ata%u: no sense translation for "
883 "status: 0x%02x\n", id
, drv_stat
);
885 /* We need a sensible error return here, which is tricky, and one
886 that won't cause people to do things like return a disk wrongly */
887 *sk
= ABORTED_COMMAND
;
893 printk(KERN_ERR
"ata%u: translated ATA stat/err 0x%02x/%02x "
894 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
895 id
, drv_stat
, drv_err
, *sk
, *asc
, *ascq
);
900 * ata_gen_passthru_sense - Generate check condition sense block.
901 * @qc: Command that completed.
903 * This function is specific to the ATA descriptor format sense
904 * block specified for the ATA pass through commands. Regardless
905 * of whether the command errored or not, return a sense
906 * block. Copy all controller registers into the sense
907 * block. Clear sense key, ASC & ASCQ if there is no error.
912 static void ata_gen_passthru_sense(struct ata_queued_cmd
*qc
)
914 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
915 struct ata_taskfile
*tf
= &qc
->result_tf
;
916 unsigned char *sb
= cmd
->sense_buffer
;
917 unsigned char *desc
= sb
+ 8;
918 int verbose
= qc
->ap
->ops
->error_handler
== NULL
;
920 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
922 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
925 * Use ata_to_sense_error() to map status register bits
926 * onto sense key, asc & ascq.
929 tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
930 ata_to_sense_error(qc
->ap
->print_id
, tf
->command
, tf
->feature
,
931 &sb
[1], &sb
[2], &sb
[3], verbose
);
936 * Sense data is current and format is descriptor.
942 /* set length of additional sense data */
947 * Copy registers into sense buffer.
950 desc
[3] = tf
->feature
; /* == error reg */
955 desc
[12] = tf
->device
;
956 desc
[13] = tf
->command
; /* == status reg */
959 * Fill in Extend bit, and the high order bytes
962 if (tf
->flags
& ATA_TFLAG_LBA48
) {
964 desc
[4] = tf
->hob_nsect
;
965 desc
[6] = tf
->hob_lbal
;
966 desc
[8] = tf
->hob_lbam
;
967 desc
[10] = tf
->hob_lbah
;
972 * ata_gen_ata_sense - generate a SCSI fixed sense block
973 * @qc: Command that we are erroring out
975 * Generate sense block for a failed ATA command @qc. Descriptor
976 * format is used to accomodate LBA48 block address.
981 static void ata_gen_ata_sense(struct ata_queued_cmd
*qc
)
983 struct ata_device
*dev
= qc
->dev
;
984 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
985 struct ata_taskfile
*tf
= &qc
->result_tf
;
986 unsigned char *sb
= cmd
->sense_buffer
;
987 unsigned char *desc
= sb
+ 8;
988 int verbose
= qc
->ap
->ops
->error_handler
== NULL
;
991 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
993 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
995 /* sense data is current and format is descriptor */
998 /* Use ata_to_sense_error() to map status register bits
999 * onto sense key, asc & ascq.
1002 tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
1003 ata_to_sense_error(qc
->ap
->print_id
, tf
->command
, tf
->feature
,
1004 &sb
[1], &sb
[2], &sb
[3], verbose
);
1008 block
= ata_tf_read_block(&qc
->result_tf
, dev
);
1010 /* information sense data descriptor */
1015 desc
[2] |= 0x80; /* valid */
1016 desc
[6] = block
>> 40;
1017 desc
[7] = block
>> 32;
1018 desc
[8] = block
>> 24;
1019 desc
[9] = block
>> 16;
1020 desc
[10] = block
>> 8;
1024 static void ata_scsi_sdev_config(struct scsi_device
*sdev
)
1026 sdev
->use_10_for_rw
= 1;
1027 sdev
->use_10_for_ms
= 1;
1029 /* Schedule policy is determined by ->qc_defer() callback and
1030 * it needs to see every deferred qc. Set dev_blocked to 1 to
1031 * prevent SCSI midlayer from automatically deferring
1034 sdev
->max_device_blocked
= 1;
1038 * atapi_drain_needed - Check whether data transfer may overflow
1039 * @rq: request to be checked
1041 * ATAPI commands which transfer variable length data to host
1042 * might overflow due to application error or hardare bug. This
1043 * function checks whether overflow should be drained and ignored
1050 * 1 if ; otherwise, 0.
1052 static int atapi_drain_needed(struct request
*rq
)
1054 if (likely(!blk_pc_request(rq
)))
1057 if (!rq
->data_len
|| (rq
->cmd_flags
& REQ_RW
))
1060 return atapi_cmd_type(rq
->cmd
[0]) == ATAPI_MISC
;
1063 static int ata_scsi_dev_config(struct scsi_device
*sdev
,
1064 struct ata_device
*dev
)
1066 if (!ata_id_has_unload(dev
->id
))
1067 dev
->flags
|= ATA_DFLAG_NO_UNLOAD
;
1069 /* configure max sectors */
1070 blk_queue_max_sectors(sdev
->request_queue
, dev
->max_sectors
);
1072 if (dev
->class == ATA_DEV_ATAPI
) {
1073 struct request_queue
*q
= sdev
->request_queue
;
1076 /* set the min alignment and padding */
1077 blk_queue_update_dma_alignment(sdev
->request_queue
,
1078 ATA_DMA_PAD_SZ
- 1);
1079 blk_queue_update_dma_pad(sdev
->request_queue
,
1080 ATA_DMA_PAD_SZ
- 1);
1082 /* configure draining */
1083 buf
= kmalloc(ATAPI_MAX_DRAIN
, q
->bounce_gfp
| GFP_KERNEL
);
1085 ata_dev_printk(dev
, KERN_ERR
,
1086 "drain buffer allocation failed\n");
1090 blk_queue_dma_drain(q
, atapi_drain_needed
, buf
, ATAPI_MAX_DRAIN
);
1092 if (ata_id_is_ssd(dev
->id
))
1093 queue_flag_set_unlocked(QUEUE_FLAG_NONROT
,
1094 sdev
->request_queue
);
1096 /* ATA devices must be sector aligned */
1097 blk_queue_update_dma_alignment(sdev
->request_queue
,
1099 sdev
->manage_start_stop
= 1;
1102 if (dev
->flags
& ATA_DFLAG_AN
)
1103 set_bit(SDEV_EVT_MEDIA_CHANGE
, sdev
->supported_events
);
1105 if (dev
->flags
& ATA_DFLAG_NCQ
) {
1108 depth
= min(sdev
->host
->can_queue
, ata_id_queue_depth(dev
->id
));
1109 depth
= min(ATA_MAX_QUEUE
- 1, depth
);
1110 scsi_set_tag_type(sdev
, MSG_SIMPLE_TAG
);
1111 scsi_activate_tcq(sdev
, depth
);
1118 * ata_scsi_slave_config - Set SCSI device attributes
1119 * @sdev: SCSI device to examine
1121 * This is called before we actually start reading
1122 * and writing to the device, to configure certain
1123 * SCSI mid-layer behaviors.
1126 * Defined by SCSI layer. We don't really care.
1129 int ata_scsi_slave_config(struct scsi_device
*sdev
)
1131 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1132 struct ata_device
*dev
= __ata_scsi_find_dev(ap
, sdev
);
1135 ata_scsi_sdev_config(sdev
);
1138 rc
= ata_scsi_dev_config(sdev
, dev
);
1144 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1145 * @sdev: SCSI device to be destroyed
1147 * @sdev is about to be destroyed for hot/warm unplugging. If
1148 * this unplugging was initiated by libata as indicated by NULL
1149 * dev->sdev, this function doesn't have to do anything.
1150 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1151 * Clear dev->sdev, schedule the device for ATA detach and invoke
1155 * Defined by SCSI layer. We don't really care.
1157 void ata_scsi_slave_destroy(struct scsi_device
*sdev
)
1159 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1160 struct request_queue
*q
= sdev
->request_queue
;
1161 unsigned long flags
;
1162 struct ata_device
*dev
;
1164 if (!ap
->ops
->error_handler
)
1167 spin_lock_irqsave(ap
->lock
, flags
);
1168 dev
= __ata_scsi_find_dev(ap
, sdev
);
1169 if (dev
&& dev
->sdev
) {
1170 /* SCSI device already in CANCEL state, no need to offline it */
1172 dev
->flags
|= ATA_DFLAG_DETACH
;
1173 ata_port_schedule_eh(ap
);
1175 spin_unlock_irqrestore(ap
->lock
, flags
);
1177 kfree(q
->dma_drain_buffer
);
1178 q
->dma_drain_buffer
= NULL
;
1179 q
->dma_drain_size
= 0;
1183 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1184 * @sdev: SCSI device to configure queue depth for
1185 * @queue_depth: new queue depth
1187 * This is libata standard hostt->change_queue_depth callback.
1188 * SCSI will call into this callback when user tries to set queue
1192 * SCSI layer (we don't care)
1195 * Newly configured queue depth.
1197 int ata_scsi_change_queue_depth(struct scsi_device
*sdev
, int queue_depth
)
1199 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1200 struct ata_device
*dev
;
1201 unsigned long flags
;
1203 if (queue_depth
< 1 || queue_depth
== sdev
->queue_depth
)
1204 return sdev
->queue_depth
;
1206 dev
= ata_scsi_find_dev(ap
, sdev
);
1207 if (!dev
|| !ata_dev_enabled(dev
))
1208 return sdev
->queue_depth
;
1211 spin_lock_irqsave(ap
->lock
, flags
);
1212 dev
->flags
&= ~ATA_DFLAG_NCQ_OFF
;
1213 if (queue_depth
== 1 || !ata_ncq_enabled(dev
)) {
1214 dev
->flags
|= ATA_DFLAG_NCQ_OFF
;
1217 spin_unlock_irqrestore(ap
->lock
, flags
);
1219 /* limit and apply queue depth */
1220 queue_depth
= min(queue_depth
, sdev
->host
->can_queue
);
1221 queue_depth
= min(queue_depth
, ata_id_queue_depth(dev
->id
));
1222 queue_depth
= min(queue_depth
, ATA_MAX_QUEUE
- 1);
1224 if (sdev
->queue_depth
== queue_depth
)
1227 scsi_adjust_queue_depth(sdev
, MSG_SIMPLE_TAG
, queue_depth
);
1231 /* XXX: for spindown warning */
1232 static void ata_delayed_done_timerfn(unsigned long arg
)
1234 struct scsi_cmnd
*scmd
= (void *)arg
;
1236 scmd
->scsi_done(scmd
);
1239 /* XXX: for spindown warning */
1240 static void ata_delayed_done(struct scsi_cmnd
*scmd
)
1242 static struct timer_list timer
;
1244 setup_timer(&timer
, ata_delayed_done_timerfn
, (unsigned long)scmd
);
1245 mod_timer(&timer
, jiffies
+ 5 * HZ
);
1249 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1250 * @qc: Storage for translated ATA taskfile
1252 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1253 * (to start). Perhaps these commands should be preceded by
1254 * CHECK POWER MODE to see what power mode the device is already in.
1255 * [See SAT revision 5 at www.t10.org]
1258 * spin_lock_irqsave(host lock)
1261 * Zero on success, non-zero on error.
1263 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd
*qc
)
1265 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1266 struct ata_taskfile
*tf
= &qc
->tf
;
1267 const u8
*cdb
= scmd
->cmnd
;
1269 if (scmd
->cmd_len
< 5)
1272 tf
->flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1273 tf
->protocol
= ATA_PROT_NODATA
;
1275 ; /* ignore IMMED bit, violates sat-r05 */
1278 goto invalid_fld
; /* LOEJ bit set not supported */
1279 if (((cdb
[4] >> 4) & 0xf) != 0)
1280 goto invalid_fld
; /* power conditions not supported */
1283 tf
->nsect
= 1; /* 1 sector, lba=0 */
1285 if (qc
->dev
->flags
& ATA_DFLAG_LBA
) {
1286 tf
->flags
|= ATA_TFLAG_LBA
;
1291 tf
->device
|= ATA_LBA
;
1294 tf
->lbal
= 0x1; /* sect */
1295 tf
->lbam
= 0x0; /* cyl low */
1296 tf
->lbah
= 0x0; /* cyl high */
1299 tf
->command
= ATA_CMD_VERIFY
; /* READ VERIFY */
1301 /* XXX: This is for backward compatibility, will be
1302 * removed. Read Documentation/feature-removal-schedule.txt
1305 if ((qc
->dev
->flags
& ATA_DFLAG_SPUNDOWN
) &&
1306 (system_state
== SYSTEM_HALT
||
1307 system_state
== SYSTEM_POWER_OFF
)) {
1308 static unsigned long warned
;
1310 if (!test_and_set_bit(0, &warned
)) {
1311 ata_dev_printk(qc
->dev
, KERN_WARNING
,
1312 "DISK MIGHT NOT BE SPUN DOWN PROPERLY. "
1313 "UPDATE SHUTDOWN UTILITY\n");
1314 ata_dev_printk(qc
->dev
, KERN_WARNING
,
1315 "For more info, visit "
1316 "http://linux-ata.org/shutdown.html\n");
1318 /* ->scsi_done is not used, use it for
1319 * delayed completion.
1321 scmd
->scsi_done
= qc
->scsidone
;
1322 qc
->scsidone
= ata_delayed_done
;
1324 scmd
->result
= SAM_STAT_GOOD
;
1328 /* Issue ATA STANDBY IMMEDIATE command */
1329 tf
->command
= ATA_CMD_STANDBYNOW1
;
1333 * Standby and Idle condition timers could be implemented but that
1334 * would require libata to implement the Power condition mode page
1335 * and allow the user to change it. Changing mode pages requires
1336 * MODE SELECT to be implemented.
1342 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1343 /* "Invalid field in cbd" */
1349 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1350 * @qc: Storage for translated ATA taskfile
1352 * Sets up an ATA taskfile to issue FLUSH CACHE or
1356 * spin_lock_irqsave(host lock)
1359 * Zero on success, non-zero on error.
1361 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd
*qc
)
1363 struct ata_taskfile
*tf
= &qc
->tf
;
1365 tf
->flags
|= ATA_TFLAG_DEVICE
;
1366 tf
->protocol
= ATA_PROT_NODATA
;
1368 if (qc
->dev
->flags
& ATA_DFLAG_FLUSH_EXT
)
1369 tf
->command
= ATA_CMD_FLUSH_EXT
;
1371 tf
->command
= ATA_CMD_FLUSH
;
1373 /* flush is critical for IO integrity, consider it an IO command */
1374 qc
->flags
|= ATA_QCFLAG_IO
;
1380 * scsi_6_lba_len - Get LBA and transfer length
1381 * @cdb: SCSI command to translate
1383 * Calculate LBA and transfer length for 6-byte commands.
1387 * @plen: the transfer length
1389 static void scsi_6_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1394 VPRINTK("six-byte command\n");
1396 lba
|= ((u64
)(cdb
[1] & 0x1f)) << 16;
1397 lba
|= ((u64
)cdb
[2]) << 8;
1398 lba
|= ((u64
)cdb
[3]);
1407 * scsi_10_lba_len - Get LBA and transfer length
1408 * @cdb: SCSI command to translate
1410 * Calculate LBA and transfer length for 10-byte commands.
1414 * @plen: the transfer length
1416 static void scsi_10_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1421 VPRINTK("ten-byte command\n");
1423 lba
|= ((u64
)cdb
[2]) << 24;
1424 lba
|= ((u64
)cdb
[3]) << 16;
1425 lba
|= ((u64
)cdb
[4]) << 8;
1426 lba
|= ((u64
)cdb
[5]);
1428 len
|= ((u32
)cdb
[7]) << 8;
1429 len
|= ((u32
)cdb
[8]);
1436 * scsi_16_lba_len - Get LBA and transfer length
1437 * @cdb: SCSI command to translate
1439 * Calculate LBA and transfer length for 16-byte commands.
1443 * @plen: the transfer length
1445 static void scsi_16_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1450 VPRINTK("sixteen-byte command\n");
1452 lba
|= ((u64
)cdb
[2]) << 56;
1453 lba
|= ((u64
)cdb
[3]) << 48;
1454 lba
|= ((u64
)cdb
[4]) << 40;
1455 lba
|= ((u64
)cdb
[5]) << 32;
1456 lba
|= ((u64
)cdb
[6]) << 24;
1457 lba
|= ((u64
)cdb
[7]) << 16;
1458 lba
|= ((u64
)cdb
[8]) << 8;
1459 lba
|= ((u64
)cdb
[9]);
1461 len
|= ((u32
)cdb
[10]) << 24;
1462 len
|= ((u32
)cdb
[11]) << 16;
1463 len
|= ((u32
)cdb
[12]) << 8;
1464 len
|= ((u32
)cdb
[13]);
1471 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1472 * @qc: Storage for translated ATA taskfile
1474 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1477 * spin_lock_irqsave(host lock)
1480 * Zero on success, non-zero on error.
1482 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd
*qc
)
1484 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1485 struct ata_taskfile
*tf
= &qc
->tf
;
1486 struct ata_device
*dev
= qc
->dev
;
1487 u64 dev_sectors
= qc
->dev
->n_sectors
;
1488 const u8
*cdb
= scmd
->cmnd
;
1492 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1493 tf
->protocol
= ATA_PROT_NODATA
;
1495 if (cdb
[0] == VERIFY
) {
1496 if (scmd
->cmd_len
< 10)
1498 scsi_10_lba_len(cdb
, &block
, &n_block
);
1499 } else if (cdb
[0] == VERIFY_16
) {
1500 if (scmd
->cmd_len
< 16)
1502 scsi_16_lba_len(cdb
, &block
, &n_block
);
1508 if (block
>= dev_sectors
)
1510 if ((block
+ n_block
) > dev_sectors
)
1513 if (dev
->flags
& ATA_DFLAG_LBA
) {
1514 tf
->flags
|= ATA_TFLAG_LBA
;
1516 if (lba_28_ok(block
, n_block
)) {
1518 tf
->command
= ATA_CMD_VERIFY
;
1519 tf
->device
|= (block
>> 24) & 0xf;
1520 } else if (lba_48_ok(block
, n_block
)) {
1521 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
1525 tf
->flags
|= ATA_TFLAG_LBA48
;
1526 tf
->command
= ATA_CMD_VERIFY_EXT
;
1528 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
1530 tf
->hob_lbah
= (block
>> 40) & 0xff;
1531 tf
->hob_lbam
= (block
>> 32) & 0xff;
1532 tf
->hob_lbal
= (block
>> 24) & 0xff;
1534 /* request too large even for LBA48 */
1537 tf
->nsect
= n_block
& 0xff;
1539 tf
->lbah
= (block
>> 16) & 0xff;
1540 tf
->lbam
= (block
>> 8) & 0xff;
1541 tf
->lbal
= block
& 0xff;
1543 tf
->device
|= ATA_LBA
;
1546 u32 sect
, head
, cyl
, track
;
1548 if (!lba_28_ok(block
, n_block
))
1551 /* Convert LBA to CHS */
1552 track
= (u32
)block
/ dev
->sectors
;
1553 cyl
= track
/ dev
->heads
;
1554 head
= track
% dev
->heads
;
1555 sect
= (u32
)block
% dev
->sectors
+ 1;
1557 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1558 (u32
)block
, track
, cyl
, head
, sect
);
1560 /* Check whether the converted CHS can fit.
1564 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
1567 tf
->command
= ATA_CMD_VERIFY
;
1568 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
1571 tf
->lbah
= cyl
>> 8;
1578 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1579 /* "Invalid field in cbd" */
1583 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1584 /* "Logical Block Address out of range" */
1588 scmd
->result
= SAM_STAT_GOOD
;
1593 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1594 * @qc: Storage for translated ATA taskfile
1596 * Converts any of six SCSI read/write commands into the
1597 * ATA counterpart, including starting sector (LBA),
1598 * sector count, and taking into account the device's LBA48
1601 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1602 * %WRITE_16 are currently supported.
1605 * spin_lock_irqsave(host lock)
1608 * Zero on success, non-zero on error.
1610 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd
*qc
)
1612 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1613 const u8
*cdb
= scmd
->cmnd
;
1614 unsigned int tf_flags
= 0;
1619 if (cdb
[0] == WRITE_10
|| cdb
[0] == WRITE_6
|| cdb
[0] == WRITE_16
)
1620 tf_flags
|= ATA_TFLAG_WRITE
;
1622 /* Calculate the SCSI LBA, transfer length and FUA. */
1626 if (unlikely(scmd
->cmd_len
< 10))
1628 scsi_10_lba_len(cdb
, &block
, &n_block
);
1629 if (unlikely(cdb
[1] & (1 << 3)))
1630 tf_flags
|= ATA_TFLAG_FUA
;
1634 if (unlikely(scmd
->cmd_len
< 6))
1636 scsi_6_lba_len(cdb
, &block
, &n_block
);
1638 /* for 6-byte r/w commands, transfer length 0
1639 * means 256 blocks of data, not 0 block.
1646 if (unlikely(scmd
->cmd_len
< 16))
1648 scsi_16_lba_len(cdb
, &block
, &n_block
);
1649 if (unlikely(cdb
[1] & (1 << 3)))
1650 tf_flags
|= ATA_TFLAG_FUA
;
1653 DPRINTK("no-byte command\n");
1657 /* Check and compose ATA command */
1659 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1660 * length 0 means transfer 0 block of data.
1661 * However, for ATA R/W commands, sector count 0 means
1662 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1664 * WARNING: one or two older ATA drives treat 0 as 0...
1668 qc
->flags
|= ATA_QCFLAG_IO
;
1669 qc
->nbytes
= n_block
* ATA_SECT_SIZE
;
1671 rc
= ata_build_rw_tf(&qc
->tf
, qc
->dev
, block
, n_block
, tf_flags
,
1673 if (likely(rc
== 0))
1678 /* treat all other errors as -EINVAL, fall through */
1680 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1681 /* "Invalid field in cbd" */
1685 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1686 /* "Logical Block Address out of range" */
1690 scmd
->result
= SAM_STAT_GOOD
;
1694 static void ata_scsi_qc_complete(struct ata_queued_cmd
*qc
)
1696 struct ata_port
*ap
= qc
->ap
;
1697 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1698 u8
*cdb
= cmd
->cmnd
;
1699 int need_sense
= (qc
->err_mask
!= 0);
1701 /* For ATA pass thru (SAT) commands, generate a sense block if
1702 * user mandated it or if there's an error. Note that if we
1703 * generate because the user forced us to, a check condition
1704 * is generated and the ATA register values are returned
1705 * whether the command completed successfully or not. If there
1706 * was no error, SK, ASC and ASCQ will all be zero.
1708 if (((cdb
[0] == ATA_16
) || (cdb
[0] == ATA_12
)) &&
1709 ((cdb
[2] & 0x20) || need_sense
)) {
1710 ata_gen_passthru_sense(qc
);
1713 cmd
->result
= SAM_STAT_GOOD
;
1715 /* TODO: decide which descriptor format to use
1716 * for 48b LBA devices and call that here
1717 * instead of the fixed desc, which is only
1718 * good for smaller LBA (and maybe CHS?)
1721 ata_gen_ata_sense(qc
);
1725 /* XXX: track spindown state for spindown skipping and warning */
1726 if (unlikely(qc
->tf
.command
== ATA_CMD_STANDBY
||
1727 qc
->tf
.command
== ATA_CMD_STANDBYNOW1
))
1728 qc
->dev
->flags
|= ATA_DFLAG_SPUNDOWN
;
1729 else if (likely(system_state
!= SYSTEM_HALT
&&
1730 system_state
!= SYSTEM_POWER_OFF
))
1731 qc
->dev
->flags
&= ~ATA_DFLAG_SPUNDOWN
;
1733 if (need_sense
&& !ap
->ops
->error_handler
)
1734 ata_dump_status(ap
->print_id
, &qc
->result_tf
);
1742 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1743 * @dev: ATA device to which the command is addressed
1744 * @cmd: SCSI command to execute
1745 * @done: SCSI command completion function
1746 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1748 * Our ->queuecommand() function has decided that the SCSI
1749 * command issued can be directly translated into an ATA
1750 * command, rather than handled internally.
1752 * This function sets up an ata_queued_cmd structure for the
1753 * SCSI command, and sends that ata_queued_cmd to the hardware.
1755 * The xlat_func argument (actor) returns 0 if ready to execute
1756 * ATA command, else 1 to finish translation. If 1 is returned
1757 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1758 * to be set reflecting an error condition or clean (early)
1762 * spin_lock_irqsave(host lock)
1765 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1766 * needs to be deferred.
1768 static int ata_scsi_translate(struct ata_device
*dev
, struct scsi_cmnd
*cmd
,
1769 void (*done
)(struct scsi_cmnd
*),
1770 ata_xlat_func_t xlat_func
)
1772 struct ata_port
*ap
= dev
->link
->ap
;
1773 struct ata_queued_cmd
*qc
;
1778 qc
= ata_scsi_qc_new(dev
, cmd
, done
);
1782 /* data is present; dma-map it */
1783 if (cmd
->sc_data_direction
== DMA_FROM_DEVICE
||
1784 cmd
->sc_data_direction
== DMA_TO_DEVICE
) {
1785 if (unlikely(scsi_bufflen(cmd
) < 1)) {
1786 ata_dev_printk(dev
, KERN_WARNING
,
1787 "WARNING: zero len r/w req\n");
1791 ata_sg_init(qc
, scsi_sglist(cmd
), scsi_sg_count(cmd
));
1793 qc
->dma_dir
= cmd
->sc_data_direction
;
1796 qc
->complete_fn
= ata_scsi_qc_complete
;
1801 if (ap
->ops
->qc_defer
) {
1802 if ((rc
= ap
->ops
->qc_defer(qc
)))
1806 /* select device, send command to hardware */
1815 DPRINTK("EXIT - early finish (good or error)\n");
1820 cmd
->result
= (DID_ERROR
<< 16);
1823 DPRINTK("EXIT - internal\n");
1828 DPRINTK("EXIT - defer\n");
1829 if (rc
== ATA_DEFER_LINK
)
1830 return SCSI_MLQUEUE_DEVICE_BUSY
;
1832 return SCSI_MLQUEUE_HOST_BUSY
;
1836 * ata_scsi_rbuf_get - Map response buffer.
1837 * @cmd: SCSI command containing buffer to be mapped.
1838 * @flags: unsigned long variable to store irq enable status
1839 * @copy_in: copy in from user buffer
1841 * Prepare buffer for simulated SCSI commands.
1844 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
1847 * Pointer to response buffer.
1849 static void *ata_scsi_rbuf_get(struct scsi_cmnd
*cmd
, bool copy_in
,
1850 unsigned long *flags
)
1852 spin_lock_irqsave(&ata_scsi_rbuf_lock
, *flags
);
1854 memset(ata_scsi_rbuf
, 0, ATA_SCSI_RBUF_SIZE
);
1856 sg_copy_to_buffer(scsi_sglist(cmd
), scsi_sg_count(cmd
),
1857 ata_scsi_rbuf
, ATA_SCSI_RBUF_SIZE
);
1858 return ata_scsi_rbuf
;
1862 * ata_scsi_rbuf_put - Unmap response buffer.
1863 * @cmd: SCSI command containing buffer to be unmapped.
1864 * @copy_out: copy out result
1865 * @flags: @flags passed to ata_scsi_rbuf_get()
1867 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1868 * @copy_back is true.
1871 * Unlocks ata_scsi_rbuf_lock.
1873 static inline void ata_scsi_rbuf_put(struct scsi_cmnd
*cmd
, bool copy_out
,
1874 unsigned long *flags
)
1877 sg_copy_from_buffer(scsi_sglist(cmd
), scsi_sg_count(cmd
),
1878 ata_scsi_rbuf
, ATA_SCSI_RBUF_SIZE
);
1879 spin_unlock_irqrestore(&ata_scsi_rbuf_lock
, *flags
);
1883 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1884 * @args: device IDENTIFY data / SCSI command of interest.
1885 * @actor: Callback hook for desired SCSI command simulator
1887 * Takes care of the hard work of simulating a SCSI command...
1888 * Mapping the response buffer, calling the command's handler,
1889 * and handling the handler's return value. This return value
1890 * indicates whether the handler wishes the SCSI command to be
1891 * completed successfully (0), or not (in which case cmd->result
1892 * and sense buffer are assumed to be set).
1895 * spin_lock_irqsave(host lock)
1897 static void ata_scsi_rbuf_fill(struct ata_scsi_args
*args
,
1898 unsigned int (*actor
)(struct ata_scsi_args
*args
, u8
*rbuf
))
1902 struct scsi_cmnd
*cmd
= args
->cmd
;
1903 unsigned long flags
;
1905 rbuf
= ata_scsi_rbuf_get(cmd
, false, &flags
);
1906 rc
= actor(args
, rbuf
);
1907 ata_scsi_rbuf_put(cmd
, rc
== 0, &flags
);
1910 cmd
->result
= SAM_STAT_GOOD
;
1915 * ata_scsiop_inq_std - Simulate INQUIRY command
1916 * @args: device IDENTIFY data / SCSI command of interest.
1917 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1919 * Returns standard device identification data associated
1920 * with non-VPD INQUIRY command output.
1923 * spin_lock_irqsave(host lock)
1925 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args
*args
, u8
*rbuf
)
1927 const u8 versions
[] = {
1928 0x60, /* SAM-3 (no version claimed) */
1931 0x20, /* SBC-2 (no version claimed) */
1934 0x60 /* SPC-3 (no version claimed) */
1939 0x5, /* claim SPC-3 version compatibility */
1946 /* set scsi removeable (RMB) bit per ata bit */
1947 if (ata_id_removeable(args
->id
))
1950 memcpy(rbuf
, hdr
, sizeof(hdr
));
1952 /* if ncq, set tags supported */
1953 if (ata_id_has_ncq(args
->id
))
1954 rbuf
[7] |= (1 << 1);
1956 memcpy(&rbuf
[8], "ATA ", 8);
1957 ata_id_string(args
->id
, &rbuf
[16], ATA_ID_PROD
, 16);
1958 ata_id_string(args
->id
, &rbuf
[32], ATA_ID_FW_REV
, 4);
1960 if (rbuf
[32] == 0 || rbuf
[32] == ' ')
1961 memcpy(&rbuf
[32], "n/a ", 4);
1963 memcpy(rbuf
+ 59, versions
, sizeof(versions
));
1969 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1970 * @args: device IDENTIFY data / SCSI command of interest.
1971 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1973 * Returns list of inquiry VPD pages available.
1976 * spin_lock_irqsave(host lock)
1978 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args
*args
, u8
*rbuf
)
1980 const u8 pages
[] = {
1981 0x00, /* page 0x00, this page */
1982 0x80, /* page 0x80, unit serial no page */
1983 0x83, /* page 0x83, device ident page */
1984 0x89, /* page 0x89, ata info 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_b1(struct ata_scsi_args
*args
, u8
*rbuf
)
2110 if (ata_id_major_version(args
->id
) > 7) {
2111 rbuf
[4] = args
->id
[217] >> 8;
2112 rbuf
[5] = args
->id
[217];
2113 rbuf
[7] = args
->id
[168] & 0xf;
2120 * ata_scsiop_noop - Command handler that simply returns success.
2121 * @args: device IDENTIFY data / SCSI command of interest.
2122 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2124 * No operation. Simply returns success to caller, to indicate
2125 * that the caller should successfully complete this SCSI command.
2128 * spin_lock_irqsave(host lock)
2130 static unsigned int ata_scsiop_noop(struct ata_scsi_args
*args
, u8
*rbuf
)
2137 * ata_msense_caching - Simulate MODE SENSE caching info page
2138 * @id: device IDENTIFY data
2139 * @buf: output buffer
2141 * Generate a caching info page, which conditionally indicates
2142 * write caching to the SCSI layer, depending on device
2148 static unsigned int ata_msense_caching(u16
*id
, u8
*buf
)
2150 memcpy(buf
, def_cache_mpage
, sizeof(def_cache_mpage
));
2151 if (ata_id_wcache_enabled(id
))
2152 buf
[2] |= (1 << 2); /* write cache enable */
2153 if (!ata_id_rahead_enabled(id
))
2154 buf
[12] |= (1 << 5); /* disable read ahead */
2155 return sizeof(def_cache_mpage
);
2159 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
2160 * @buf: output buffer
2162 * Generate a generic MODE SENSE control mode page.
2167 static unsigned int ata_msense_ctl_mode(u8
*buf
)
2169 memcpy(buf
, def_control_mpage
, sizeof(def_control_mpage
));
2170 return sizeof(def_control_mpage
);
2174 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2175 * @buf: output buffer
2177 * Generate a generic MODE SENSE r/w error recovery page.
2182 static unsigned int ata_msense_rw_recovery(u8
*buf
)
2184 memcpy(buf
, def_rw_recovery_mpage
, sizeof(def_rw_recovery_mpage
));
2185 return sizeof(def_rw_recovery_mpage
);
2189 * We can turn this into a real blacklist if it's needed, for now just
2190 * blacklist any Maxtor BANC1G10 revision firmware
2192 static int ata_dev_supports_fua(u16
*id
)
2194 unsigned char model
[ATA_ID_PROD_LEN
+ 1], fw
[ATA_ID_FW_REV_LEN
+ 1];
2198 if (!ata_id_has_fua(id
))
2201 ata_id_c_string(id
, model
, ATA_ID_PROD
, sizeof(model
));
2202 ata_id_c_string(id
, fw
, ATA_ID_FW_REV
, sizeof(fw
));
2204 if (strcmp(model
, "Maxtor"))
2206 if (strcmp(fw
, "BANC1G10"))
2209 return 0; /* blacklisted */
2213 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2214 * @args: device IDENTIFY data / SCSI command of interest.
2215 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2217 * Simulate MODE SENSE commands. Assume this is invoked for direct
2218 * access devices (e.g. disks) only. There should be no block
2219 * descriptor for other device types.
2222 * spin_lock_irqsave(host lock)
2224 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args
*args
, u8
*rbuf
)
2226 struct ata_device
*dev
= args
->dev
;
2227 u8
*scsicmd
= args
->cmd
->cmnd
, *p
= rbuf
;
2228 const u8 sat_blk_desc
[] = {
2229 0, 0, 0, 0, /* number of blocks: sat unspecified */
2231 0, 0x2, 0x0 /* block length: 512 bytes */
2234 unsigned int ebd
, page_control
, six_byte
;
2239 six_byte
= (scsicmd
[0] == MODE_SENSE
);
2240 ebd
= !(scsicmd
[1] & 0x8); /* dbd bit inverted == edb */
2242 * LLBA bit in msense(10) ignored (compliant)
2245 page_control
= scsicmd
[2] >> 6;
2246 switch (page_control
) {
2247 case 0: /* current */
2248 break; /* supported */
2250 goto saving_not_supp
;
2251 case 1: /* changeable */
2252 case 2: /* defaults */
2258 p
+= 4 + (ebd
? 8 : 0);
2260 p
+= 8 + (ebd
? 8 : 0);
2262 pg
= scsicmd
[2] & 0x3f;
2265 * No mode subpages supported (yet) but asking for _all_
2266 * subpages may be valid
2268 if (spg
&& (spg
!= ALL_SUB_MPAGES
))
2272 case RW_RECOVERY_MPAGE
:
2273 p
+= ata_msense_rw_recovery(p
);
2277 p
+= ata_msense_caching(args
->id
, p
);
2281 p
+= ata_msense_ctl_mode(p
);
2285 p
+= ata_msense_rw_recovery(p
);
2286 p
+= ata_msense_caching(args
->id
, p
);
2287 p
+= ata_msense_ctl_mode(p
);
2290 default: /* invalid page code */
2295 if (ata_dev_supports_fua(args
->id
) && (dev
->flags
& ATA_DFLAG_LBA48
) &&
2296 (!(dev
->flags
& ATA_DFLAG_PIO
) || dev
->multi_count
))
2300 rbuf
[0] = p
- rbuf
- 1;
2303 rbuf
[3] = sizeof(sat_blk_desc
);
2304 memcpy(rbuf
+ 4, sat_blk_desc
, sizeof(sat_blk_desc
));
2307 unsigned int output_len
= p
- rbuf
- 2;
2309 rbuf
[0] = output_len
>> 8;
2310 rbuf
[1] = output_len
;
2313 rbuf
[7] = sizeof(sat_blk_desc
);
2314 memcpy(rbuf
+ 8, sat_blk_desc
, sizeof(sat_blk_desc
));
2320 ata_scsi_set_sense(args
->cmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
2321 /* "Invalid field in cbd" */
2325 ata_scsi_set_sense(args
->cmd
, ILLEGAL_REQUEST
, 0x39, 0x0);
2326 /* "Saving parameters not supported" */
2331 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2332 * @args: device IDENTIFY data / SCSI command of interest.
2333 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2335 * Simulate READ CAPACITY commands.
2340 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args
*args
, u8
*rbuf
)
2342 u64 last_lba
= args
->dev
->n_sectors
- 1; /* LBA of the last block */
2346 if (args
->cmd
->cmnd
[0] == READ_CAPACITY
) {
2347 if (last_lba
>= 0xffffffffULL
)
2348 last_lba
= 0xffffffff;
2350 /* sector count, 32-bit */
2351 rbuf
[0] = last_lba
>> (8 * 3);
2352 rbuf
[1] = last_lba
>> (8 * 2);
2353 rbuf
[2] = last_lba
>> (8 * 1);
2357 rbuf
[6] = ATA_SECT_SIZE
>> 8;
2358 rbuf
[7] = ATA_SECT_SIZE
& 0xff;
2360 /* sector count, 64-bit */
2361 rbuf
[0] = last_lba
>> (8 * 7);
2362 rbuf
[1] = last_lba
>> (8 * 6);
2363 rbuf
[2] = last_lba
>> (8 * 5);
2364 rbuf
[3] = last_lba
>> (8 * 4);
2365 rbuf
[4] = last_lba
>> (8 * 3);
2366 rbuf
[5] = last_lba
>> (8 * 2);
2367 rbuf
[6] = last_lba
>> (8 * 1);
2371 rbuf
[10] = ATA_SECT_SIZE
>> 8;
2372 rbuf
[11] = ATA_SECT_SIZE
& 0xff;
2379 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2380 * @args: device IDENTIFY data / SCSI command of interest.
2381 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2383 * Simulate REPORT LUNS command.
2386 * spin_lock_irqsave(host lock)
2388 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args
*args
, u8
*rbuf
)
2391 rbuf
[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2396 static void atapi_sense_complete(struct ata_queued_cmd
*qc
)
2398 if (qc
->err_mask
&& ((qc
->err_mask
& AC_ERR_DEV
) == 0)) {
2399 /* FIXME: not quite right; we don't want the
2400 * translation of taskfile registers into
2401 * a sense descriptors, since that's only
2402 * correct for ATA, not ATAPI
2404 ata_gen_passthru_sense(qc
);
2407 qc
->scsidone(qc
->scsicmd
);
2411 /* is it pointless to prefer PIO for "safety reasons"? */
2412 static inline int ata_pio_use_silly(struct ata_port
*ap
)
2414 return (ap
->flags
& ATA_FLAG_PIO_DMA
);
2417 static void atapi_request_sense(struct ata_queued_cmd
*qc
)
2419 struct ata_port
*ap
= qc
->ap
;
2420 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2422 DPRINTK("ATAPI request sense\n");
2424 /* FIXME: is this needed? */
2425 memset(cmd
->sense_buffer
, 0, SCSI_SENSE_BUFFERSIZE
);
2427 #ifdef CONFIG_ATA_SFF
2428 if (ap
->ops
->sff_tf_read
)
2429 ap
->ops
->sff_tf_read(ap
, &qc
->tf
);
2432 /* fill these in, for the case where they are -not- overwritten */
2433 cmd
->sense_buffer
[0] = 0x70;
2434 cmd
->sense_buffer
[2] = qc
->tf
.feature
>> 4;
2438 /* setup sg table and init transfer direction */
2439 sg_init_one(&qc
->sgent
, cmd
->sense_buffer
, SCSI_SENSE_BUFFERSIZE
);
2440 ata_sg_init(qc
, &qc
->sgent
, 1);
2441 qc
->dma_dir
= DMA_FROM_DEVICE
;
2443 memset(&qc
->cdb
, 0, qc
->dev
->cdb_len
);
2444 qc
->cdb
[0] = REQUEST_SENSE
;
2445 qc
->cdb
[4] = SCSI_SENSE_BUFFERSIZE
;
2447 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2448 qc
->tf
.command
= ATA_CMD_PACKET
;
2450 if (ata_pio_use_silly(ap
)) {
2451 qc
->tf
.protocol
= ATAPI_PROT_DMA
;
2452 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
2454 qc
->tf
.protocol
= ATAPI_PROT_PIO
;
2455 qc
->tf
.lbam
= SCSI_SENSE_BUFFERSIZE
;
2458 qc
->nbytes
= SCSI_SENSE_BUFFERSIZE
;
2460 qc
->complete_fn
= atapi_sense_complete
;
2467 static void atapi_qc_complete(struct ata_queued_cmd
*qc
)
2469 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2470 unsigned int err_mask
= qc
->err_mask
;
2472 VPRINTK("ENTER, err_mask 0x%X\n", err_mask
);
2474 /* handle completion from new EH */
2475 if (unlikely(qc
->ap
->ops
->error_handler
&&
2476 (err_mask
|| qc
->flags
& ATA_QCFLAG_SENSE_VALID
))) {
2478 if (!(qc
->flags
& ATA_QCFLAG_SENSE_VALID
)) {
2479 /* FIXME: not quite right; we don't want the
2480 * translation of taskfile registers into a
2481 * sense descriptors, since that's only
2482 * correct for ATA, not ATAPI
2484 ata_gen_passthru_sense(qc
);
2487 /* SCSI EH automatically locks door if sdev->locked is
2488 * set. Sometimes door lock request continues to
2489 * fail, for example, when no media is present. This
2490 * creates a loop - SCSI EH issues door lock which
2491 * fails and gets invoked again to acquire sense data
2492 * for the failed command.
2494 * If door lock fails, always clear sdev->locked to
2495 * avoid this infinite loop.
2497 if (qc
->cdb
[0] == ALLOW_MEDIUM_REMOVAL
)
2498 qc
->dev
->sdev
->locked
= 0;
2500 qc
->scsicmd
->result
= SAM_STAT_CHECK_CONDITION
;
2506 /* successful completion or old EH failure path */
2507 if (unlikely(err_mask
& AC_ERR_DEV
)) {
2508 cmd
->result
= SAM_STAT_CHECK_CONDITION
;
2509 atapi_request_sense(qc
);
2511 } else if (unlikely(err_mask
)) {
2512 /* FIXME: not quite right; we don't want the
2513 * translation of taskfile registers into
2514 * a sense descriptors, since that's only
2515 * correct for ATA, not ATAPI
2517 ata_gen_passthru_sense(qc
);
2519 u8
*scsicmd
= cmd
->cmnd
;
2521 if ((scsicmd
[0] == INQUIRY
) && ((scsicmd
[1] & 0x03) == 0)) {
2522 unsigned long flags
;
2525 buf
= ata_scsi_rbuf_get(cmd
, true, &flags
);
2527 /* ATAPI devices typically report zero for their SCSI version,
2528 * and sometimes deviate from the spec WRT response data
2529 * format. If SCSI version is reported as zero like normal,
2530 * then we make the following fixups: 1) Fake MMC-5 version,
2531 * to indicate to the Linux scsi midlayer this is a modern
2532 * device. 2) Ensure response data format / ATAPI information
2533 * are always correct.
2540 ata_scsi_rbuf_put(cmd
, true, &flags
);
2543 cmd
->result
= SAM_STAT_GOOD
;
2550 * atapi_xlat - Initialize PACKET taskfile
2551 * @qc: command structure to be initialized
2554 * spin_lock_irqsave(host lock)
2557 * Zero on success, non-zero on failure.
2559 static unsigned int atapi_xlat(struct ata_queued_cmd
*qc
)
2561 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
2562 struct ata_device
*dev
= qc
->dev
;
2563 int nodata
= (scmd
->sc_data_direction
== DMA_NONE
);
2564 int using_pio
= !nodata
&& (dev
->flags
& ATA_DFLAG_PIO
);
2565 unsigned int nbytes
;
2567 memset(qc
->cdb
, 0, dev
->cdb_len
);
2568 memcpy(qc
->cdb
, scmd
->cmnd
, scmd
->cmd_len
);
2570 qc
->complete_fn
= atapi_qc_complete
;
2572 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2573 if (scmd
->sc_data_direction
== DMA_TO_DEVICE
) {
2574 qc
->tf
.flags
|= ATA_TFLAG_WRITE
;
2575 DPRINTK("direction: write\n");
2578 qc
->tf
.command
= ATA_CMD_PACKET
;
2579 ata_qc_set_pc_nbytes(qc
);
2581 /* check whether ATAPI DMA is safe */
2582 if (!nodata
&& !using_pio
&& atapi_check_dma(qc
))
2585 /* Some controller variants snoop this value for Packet
2586 * transfers to do state machine and FIFO management. Thus we
2587 * want to set it properly, and for DMA where it is
2588 * effectively meaningless.
2590 nbytes
= min(ata_qc_raw_nbytes(qc
), (unsigned int)63 * 1024);
2592 /* Most ATAPI devices which honor transfer chunk size don't
2593 * behave according to the spec when odd chunk size which
2594 * matches the transfer length is specified. If the number of
2595 * bytes to transfer is 2n+1. According to the spec, what
2596 * should happen is to indicate that 2n+1 is going to be
2597 * transferred and transfer 2n+2 bytes where the last byte is
2600 * In practice, this doesn't happen. ATAPI devices first
2601 * indicate and transfer 2n bytes and then indicate and
2602 * transfer 2 bytes where the last byte is padding.
2604 * This inconsistency confuses several controllers which
2605 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2606 * These controllers use actual number of transferred bytes to
2607 * update DMA poitner and transfer of 4n+2 bytes make those
2608 * controller push DMA pointer by 4n+4 bytes because SATA data
2609 * FISes are aligned to 4 bytes. This causes data corruption
2610 * and buffer overrun.
2612 * Always setting nbytes to even number solves this problem
2613 * because then ATAPI devices don't have to split data at 2n
2619 qc
->tf
.lbam
= (nbytes
& 0xFF);
2620 qc
->tf
.lbah
= (nbytes
>> 8);
2623 qc
->tf
.protocol
= ATAPI_PROT_NODATA
;
2625 qc
->tf
.protocol
= ATAPI_PROT_PIO
;
2628 qc
->tf
.protocol
= ATAPI_PROT_DMA
;
2629 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
2631 if ((dev
->flags
& ATA_DFLAG_DMADIR
) &&
2632 (scmd
->sc_data_direction
!= DMA_TO_DEVICE
))
2633 /* some SATA bridges need us to indicate data xfer direction */
2634 qc
->tf
.feature
|= ATAPI_DMADIR
;
2638 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2639 as ATAPI tape drives don't get this right otherwise */
2643 static struct ata_device
*ata_find_dev(struct ata_port
*ap
, int devno
)
2645 if (!sata_pmp_attached(ap
)) {
2646 if (likely(devno
< ata_link_max_devices(&ap
->link
)))
2647 return &ap
->link
.device
[devno
];
2649 if (likely(devno
< ap
->nr_pmp_links
))
2650 return &ap
->pmp_link
[devno
].device
[0];
2656 static struct ata_device
*__ata_scsi_find_dev(struct ata_port
*ap
,
2657 const struct scsi_device
*scsidev
)
2661 /* skip commands not addressed to targets we simulate */
2662 if (!sata_pmp_attached(ap
)) {
2663 if (unlikely(scsidev
->channel
|| scsidev
->lun
))
2665 devno
= scsidev
->id
;
2667 if (unlikely(scsidev
->id
|| scsidev
->lun
))
2669 devno
= scsidev
->channel
;
2672 return ata_find_dev(ap
, devno
);
2676 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2677 * @ap: ATA port to which the device is attached
2678 * @scsidev: SCSI device from which we derive the ATA device
2680 * Given various information provided in struct scsi_cmnd,
2681 * map that onto an ATA bus, and using that mapping
2682 * determine which ata_device is associated with the
2683 * SCSI command to be sent.
2686 * spin_lock_irqsave(host lock)
2689 * Associated ATA device, or %NULL if not found.
2691 static struct ata_device
*
2692 ata_scsi_find_dev(struct ata_port
*ap
, const struct scsi_device
*scsidev
)
2694 struct ata_device
*dev
= __ata_scsi_find_dev(ap
, scsidev
);
2696 if (unlikely(!dev
|| !ata_dev_enabled(dev
)))
2703 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2704 * @byte1: Byte 1 from pass-thru CDB.
2707 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2710 ata_scsi_map_proto(u8 byte1
)
2712 switch((byte1
& 0x1e) >> 1) {
2713 case 3: /* Non-data */
2714 return ATA_PROT_NODATA
;
2717 case 10: /* UDMA Data-in */
2718 case 11: /* UDMA Data-Out */
2719 return ATA_PROT_DMA
;
2721 case 4: /* PIO Data-in */
2722 case 5: /* PIO Data-out */
2723 return ATA_PROT_PIO
;
2725 case 0: /* Hard Reset */
2727 case 8: /* Device Diagnostic */
2728 case 9: /* Device Reset */
2729 case 7: /* DMA Queued */
2730 case 12: /* FPDMA */
2731 case 15: /* Return Response Info */
2732 default: /* Reserved */
2736 return ATA_PROT_UNKNOWN
;
2740 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2741 * @qc: command structure to be initialized
2743 * Handles either 12 or 16-byte versions of the CDB.
2746 * Zero on success, non-zero on failure.
2748 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd
*qc
)
2750 struct ata_taskfile
*tf
= &(qc
->tf
);
2751 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
2752 struct ata_device
*dev
= qc
->dev
;
2753 const u8
*cdb
= scmd
->cmnd
;
2755 if ((tf
->protocol
= ata_scsi_map_proto(cdb
[1])) == ATA_PROT_UNKNOWN
)
2759 * Filter TPM commands by default. These provide an
2760 * essentially uncontrolled encrypted "back door" between
2761 * applications and the disk. Set libata.allow_tpm=1 if you
2762 * have a real reason for wanting to use them. This ensures
2763 * that installed software cannot easily mess stuff up without
2764 * user intent. DVR type users will probably ship with this enabled
2765 * for movie content management.
2767 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
2768 * for this and should do in future but that it is not sufficient as
2769 * DCS is an optional feature set. Thus we also do the software filter
2770 * so that we comply with the TC consortium stated goal that the user
2771 * can turn off TC features of their system.
2773 if (tf
->command
>= 0x5C && tf
->command
<= 0x5F && !libata_allow_tpm
)
2776 /* We may not issue DMA commands if no DMA mode is set */
2777 if (tf
->protocol
== ATA_PROT_DMA
&& dev
->dma_mode
== 0)
2781 * 12 and 16 byte CDBs use different offsets to
2782 * provide the various register values.
2784 if (cdb
[0] == ATA_16
) {
2786 * 16-byte CDB - may contain extended commands.
2788 * If that is the case, copy the upper byte register values.
2790 if (cdb
[1] & 0x01) {
2791 tf
->hob_feature
= cdb
[3];
2792 tf
->hob_nsect
= cdb
[5];
2793 tf
->hob_lbal
= cdb
[7];
2794 tf
->hob_lbam
= cdb
[9];
2795 tf
->hob_lbah
= cdb
[11];
2796 tf
->flags
|= ATA_TFLAG_LBA48
;
2798 tf
->flags
&= ~ATA_TFLAG_LBA48
;
2801 * Always copy low byte, device and command registers.
2803 tf
->feature
= cdb
[4];
2808 tf
->device
= cdb
[13];
2809 tf
->command
= cdb
[14];
2812 * 12-byte CDB - incapable of extended commands.
2814 tf
->flags
&= ~ATA_TFLAG_LBA48
;
2816 tf
->feature
= cdb
[3];
2821 tf
->device
= cdb
[8];
2822 tf
->command
= cdb
[9];
2825 /* enforce correct master/slave bit */
2826 tf
->device
= dev
->devno
?
2827 tf
->device
| ATA_DEV1
: tf
->device
& ~ATA_DEV1
;
2829 /* sanity check for pio multi commands */
2830 if ((cdb
[1] & 0xe0) && !is_multi_taskfile(tf
))
2833 if (is_multi_taskfile(tf
)) {
2834 unsigned int multi_count
= 1 << (cdb
[1] >> 5);
2836 /* compare the passed through multi_count
2837 * with the cached multi_count of libata
2839 if (multi_count
!= dev
->multi_count
)
2840 ata_dev_printk(dev
, KERN_WARNING
,
2841 "invalid multi_count %u ignored\n",
2845 /* READ/WRITE LONG use a non-standard sect_size */
2846 qc
->sect_size
= ATA_SECT_SIZE
;
2847 switch (tf
->command
) {
2848 case ATA_CMD_READ_LONG
:
2849 case ATA_CMD_READ_LONG_ONCE
:
2850 case ATA_CMD_WRITE_LONG
:
2851 case ATA_CMD_WRITE_LONG_ONCE
:
2852 if (tf
->protocol
!= ATA_PROT_PIO
|| tf
->nsect
!= 1)
2854 qc
->sect_size
= scsi_bufflen(scmd
);
2858 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2859 * SET_FEATURES - XFER MODE must be preceded/succeeded
2860 * by an update to hardware-specific registers for each
2861 * controller (i.e. the reason for ->set_piomode(),
2862 * ->set_dmamode(), and ->post_set_mode() hooks).
2864 if ((tf
->command
== ATA_CMD_SET_FEATURES
)
2865 && (tf
->feature
== SETFEATURES_XFER
))
2869 * Set flags so that all registers will be written,
2870 * and pass on write indication (used for PIO/DMA
2873 tf
->flags
|= (ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
);
2875 if (scmd
->sc_data_direction
== DMA_TO_DEVICE
)
2876 tf
->flags
|= ATA_TFLAG_WRITE
;
2879 * Set transfer length.
2881 * TODO: find out if we need to do more here to
2882 * cover scatter/gather case.
2884 ata_qc_set_pc_nbytes(qc
);
2886 /* request result TF and be quiet about device error */
2887 qc
->flags
|= ATA_QCFLAG_RESULT_TF
| ATA_QCFLAG_QUIET
;
2892 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x00);
2893 /* "Invalid field in cdb" */
2898 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2900 * @cmd: SCSI command opcode to consider
2902 * Look up the SCSI command given, and determine whether the
2903 * SCSI command is to be translated or simulated.
2906 * Pointer to translation function if possible, %NULL if not.
2909 static inline ata_xlat_func_t
ata_get_xlat_func(struct ata_device
*dev
, u8 cmd
)
2919 return ata_scsi_rw_xlat
;
2921 case SYNCHRONIZE_CACHE
:
2922 if (ata_try_flush_cache(dev
))
2923 return ata_scsi_flush_xlat
;
2928 return ata_scsi_verify_xlat
;
2932 return ata_scsi_pass_thru
;
2935 return ata_scsi_start_stop_xlat
;
2942 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2943 * @ap: ATA port to which the command was being sent
2944 * @cmd: SCSI command to dump
2946 * Prints the contents of a SCSI command via printk().
2949 static inline void ata_scsi_dump_cdb(struct ata_port
*ap
,
2950 struct scsi_cmnd
*cmd
)
2953 struct scsi_device
*scsidev
= cmd
->device
;
2954 u8
*scsicmd
= cmd
->cmnd
;
2956 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
2958 scsidev
->channel
, scsidev
->id
, scsidev
->lun
,
2959 scsicmd
[0], scsicmd
[1], scsicmd
[2], scsicmd
[3],
2960 scsicmd
[4], scsicmd
[5], scsicmd
[6], scsicmd
[7],
2965 static inline int __ata_scsi_queuecmd(struct scsi_cmnd
*scmd
,
2966 void (*done
)(struct scsi_cmnd
*),
2967 struct ata_device
*dev
)
2969 u8 scsi_op
= scmd
->cmnd
[0];
2970 ata_xlat_func_t xlat_func
;
2973 if (dev
->class == ATA_DEV_ATA
) {
2974 if (unlikely(!scmd
->cmd_len
|| scmd
->cmd_len
> dev
->cdb_len
))
2977 xlat_func
= ata_get_xlat_func(dev
, scsi_op
);
2979 if (unlikely(!scmd
->cmd_len
))
2983 if (likely((scsi_op
!= ATA_16
) || !atapi_passthru16
)) {
2984 /* relay SCSI command to ATAPI device */
2985 int len
= COMMAND_SIZE(scsi_op
);
2986 if (unlikely(len
> scmd
->cmd_len
|| len
> dev
->cdb_len
))
2989 xlat_func
= atapi_xlat
;
2991 /* ATA_16 passthru, treat as an ATA command */
2992 if (unlikely(scmd
->cmd_len
> 16))
2995 xlat_func
= ata_get_xlat_func(dev
, scsi_op
);
3000 rc
= ata_scsi_translate(dev
, scmd
, done
, xlat_func
);
3002 ata_scsi_simulate(dev
, scmd
, done
);
3007 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
3008 scmd
->cmd_len
, scsi_op
, dev
->cdb_len
);
3009 scmd
->result
= DID_ERROR
<< 16;
3015 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
3016 * @cmd: SCSI command to be sent
3017 * @done: Completion function, called when command is complete
3019 * In some cases, this function translates SCSI commands into
3020 * ATA taskfiles, and queues the taskfiles to be sent to
3021 * hardware. In other cases, this function simulates a
3022 * SCSI device by evaluating and responding to certain
3023 * SCSI commands. This creates the overall effect of
3024 * ATA and ATAPI devices appearing as SCSI devices.
3027 * Releases scsi-layer-held lock, and obtains host lock.
3030 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3033 int ata_scsi_queuecmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*))
3035 struct ata_port
*ap
;
3036 struct ata_device
*dev
;
3037 struct scsi_device
*scsidev
= cmd
->device
;
3038 struct Scsi_Host
*shost
= scsidev
->host
;
3041 ap
= ata_shost_to_port(shost
);
3043 spin_unlock(shost
->host_lock
);
3044 spin_lock(ap
->lock
);
3046 ata_scsi_dump_cdb(ap
, cmd
);
3048 dev
= ata_scsi_find_dev(ap
, scsidev
);
3050 rc
= __ata_scsi_queuecmd(cmd
, done
, dev
);
3052 cmd
->result
= (DID_BAD_TARGET
<< 16);
3056 spin_unlock(ap
->lock
);
3057 spin_lock(shost
->host_lock
);
3062 * ata_scsi_simulate - simulate SCSI command on ATA device
3063 * @dev: the target device
3064 * @cmd: SCSI command being sent to device.
3065 * @done: SCSI command completion function.
3067 * Interprets and directly executes a select list of SCSI commands
3068 * that can be handled internally.
3071 * spin_lock_irqsave(host lock)
3074 void ata_scsi_simulate(struct ata_device
*dev
, struct scsi_cmnd
*cmd
,
3075 void (*done
)(struct scsi_cmnd
*))
3077 struct ata_scsi_args args
;
3078 const u8
*scsicmd
= cmd
->cmnd
;
3086 switch(scsicmd
[0]) {
3087 /* TODO: worth improving? */
3089 ata_scsi_invalid_field(cmd
, done
);
3093 if (scsicmd
[1] & 2) /* is CmdDt set? */
3094 ata_scsi_invalid_field(cmd
, done
);
3095 else if ((scsicmd
[1] & 1) == 0) /* is EVPD clear? */
3096 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_std
);
3097 else switch (scsicmd
[2]) {
3099 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_00
);
3102 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_80
);
3105 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_83
);
3108 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_89
);
3111 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_b1
);
3114 ata_scsi_invalid_field(cmd
, done
);
3121 ata_scsi_rbuf_fill(&args
, ata_scsiop_mode_sense
);
3124 case MODE_SELECT
: /* unconditionally return */
3125 case MODE_SELECT_10
: /* bad-field-in-cdb */
3126 ata_scsi_invalid_field(cmd
, done
);
3130 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
3133 case SERVICE_ACTION_IN
:
3134 if ((scsicmd
[1] & 0x1f) == SAI_READ_CAPACITY_16
)
3135 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
3137 ata_scsi_invalid_field(cmd
, done
);
3141 ata_scsi_rbuf_fill(&args
, ata_scsiop_report_luns
);
3145 ata_scsi_set_sense(cmd
, 0, 0, 0);
3146 cmd
->result
= (DRIVER_SENSE
<< 24);
3150 /* if we reach this, then writeback caching is disabled,
3151 * turning this into a no-op.
3153 case SYNCHRONIZE_CACHE
:
3156 /* no-op's, complete with success */
3160 case TEST_UNIT_READY
:
3161 ata_scsi_rbuf_fill(&args
, ata_scsiop_noop
);
3164 case SEND_DIAGNOSTIC
:
3165 tmp8
= scsicmd
[1] & ~(1 << 3);
3166 if ((tmp8
== 0x4) && (!scsicmd
[3]) && (!scsicmd
[4]))
3167 ata_scsi_rbuf_fill(&args
, ata_scsiop_noop
);
3169 ata_scsi_invalid_field(cmd
, done
);
3172 /* all other commands */
3174 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, 0x20, 0x0);
3175 /* "Invalid command operation code" */
3181 int ata_scsi_add_hosts(struct ata_host
*host
, struct scsi_host_template
*sht
)
3185 for (i
= 0; i
< host
->n_ports
; i
++) {
3186 struct ata_port
*ap
= host
->ports
[i
];
3187 struct Scsi_Host
*shost
;
3190 shost
= scsi_host_alloc(sht
, sizeof(struct ata_port
*));
3194 *(struct ata_port
**)&shost
->hostdata
[0] = ap
;
3195 ap
->scsi_host
= shost
;
3197 shost
->transportt
= &ata_scsi_transport_template
;
3198 shost
->unique_id
= ap
->print_id
;
3201 shost
->max_channel
= 1;
3202 shost
->max_cmd_len
= 16;
3204 /* Schedule policy is determined by ->qc_defer()
3205 * callback and it needs to see every deferred qc.
3206 * Set host_blocked to 1 to prevent SCSI midlayer from
3207 * automatically deferring requests.
3209 shost
->max_host_blocked
= 1;
3211 rc
= scsi_add_host(ap
->scsi_host
, ap
->host
->dev
);
3219 scsi_host_put(host
->ports
[i
]->scsi_host
);
3222 struct Scsi_Host
*shost
= host
->ports
[i
]->scsi_host
;
3224 scsi_remove_host(shost
);
3225 scsi_host_put(shost
);
3230 void ata_scsi_scan_host(struct ata_port
*ap
, int sync
)
3233 struct ata_device
*last_failed_dev
= NULL
;
3234 struct ata_link
*link
;
3235 struct ata_device
*dev
;
3237 if (ap
->flags
& ATA_FLAG_DISABLED
)
3241 ata_port_for_each_link(link
, ap
) {
3242 ata_link_for_each_dev(dev
, link
) {
3243 struct scsi_device
*sdev
;
3244 int channel
= 0, id
= 0;
3246 if (!ata_dev_enabled(dev
) || dev
->sdev
)
3249 if (ata_is_host_link(link
))
3252 channel
= link
->pmp
;
3254 sdev
= __scsi_add_device(ap
->scsi_host
, channel
, id
, 0,
3256 if (!IS_ERR(sdev
)) {
3258 scsi_device_put(sdev
);
3263 /* If we scanned while EH was in progress or allocation
3264 * failure occurred, scan would have failed silently. Check
3265 * whether all devices are attached.
3267 ata_port_for_each_link(link
, ap
) {
3268 ata_link_for_each_dev(dev
, link
) {
3269 if (ata_dev_enabled(dev
) && !dev
->sdev
)
3277 /* we're missing some SCSI devices */
3279 /* If caller requested synchrnous scan && we've made
3280 * any progress, sleep briefly and repeat.
3282 if (dev
!= last_failed_dev
) {
3284 last_failed_dev
= dev
;
3288 /* We might be failing to detect boot device, give it
3289 * a few more chances.
3296 ata_port_printk(ap
, KERN_ERR
, "WARNING: synchronous SCSI scan "
3297 "failed without making any progress,\n"
3298 " switching to async\n");
3301 queue_delayed_work(ata_aux_wq
, &ap
->hotplug_task
,
3302 round_jiffies_relative(HZ
));
3306 * ata_scsi_offline_dev - offline attached SCSI device
3307 * @dev: ATA device to offline attached SCSI device for
3309 * This function is called from ata_eh_hotplug() and responsible
3310 * for taking the SCSI device attached to @dev offline. This
3311 * function is called with host lock which protects dev->sdev
3315 * spin_lock_irqsave(host lock)
3318 * 1 if attached SCSI device exists, 0 otherwise.
3320 int ata_scsi_offline_dev(struct ata_device
*dev
)
3323 scsi_device_set_state(dev
->sdev
, SDEV_OFFLINE
);
3330 * ata_scsi_remove_dev - remove attached SCSI device
3331 * @dev: ATA device to remove attached SCSI device for
3333 * This function is called from ata_eh_scsi_hotplug() and
3334 * responsible for removing the SCSI device attached to @dev.
3337 * Kernel thread context (may sleep).
3339 static void ata_scsi_remove_dev(struct ata_device
*dev
)
3341 struct ata_port
*ap
= dev
->link
->ap
;
3342 struct scsi_device
*sdev
;
3343 unsigned long flags
;
3345 /* Alas, we need to grab scan_mutex to ensure SCSI device
3346 * state doesn't change underneath us and thus
3347 * scsi_device_get() always succeeds. The mutex locking can
3348 * be removed if there is __scsi_device_get() interface which
3349 * increments reference counts regardless of device state.
3351 mutex_lock(&ap
->scsi_host
->scan_mutex
);
3352 spin_lock_irqsave(ap
->lock
, flags
);
3354 /* clearing dev->sdev is protected by host lock */
3359 /* If user initiated unplug races with us, sdev can go
3360 * away underneath us after the host lock and
3361 * scan_mutex are released. Hold onto it.
3363 if (scsi_device_get(sdev
) == 0) {
3364 /* The following ensures the attached sdev is
3365 * offline on return from ata_scsi_offline_dev()
3366 * regardless it wins or loses the race
3367 * against this function.
3369 scsi_device_set_state(sdev
, SDEV_OFFLINE
);
3376 spin_unlock_irqrestore(ap
->lock
, flags
);
3377 mutex_unlock(&ap
->scsi_host
->scan_mutex
);
3380 ata_dev_printk(dev
, KERN_INFO
, "detaching (SCSI %s)\n",
3381 sdev
->sdev_gendev
.bus_id
);
3383 scsi_remove_device(sdev
);
3384 scsi_device_put(sdev
);
3388 static void ata_scsi_handle_link_detach(struct ata_link
*link
)
3390 struct ata_port
*ap
= link
->ap
;
3391 struct ata_device
*dev
;
3393 ata_link_for_each_dev(dev
, link
) {
3394 unsigned long flags
;
3396 if (!(dev
->flags
& ATA_DFLAG_DETACHED
))
3399 spin_lock_irqsave(ap
->lock
, flags
);
3400 dev
->flags
&= ~ATA_DFLAG_DETACHED
;
3401 spin_unlock_irqrestore(ap
->lock
, flags
);
3403 ata_scsi_remove_dev(dev
);
3408 * ata_scsi_media_change_notify - send media change event
3409 * @dev: Pointer to the disk device with media change event
3411 * Tell the block layer to send a media change notification
3415 * spin_lock_irqsave(host lock)
3417 void ata_scsi_media_change_notify(struct ata_device
*dev
)
3420 sdev_evt_send_simple(dev
->sdev
, SDEV_EVT_MEDIA_CHANGE
,
3425 * ata_scsi_hotplug - SCSI part of hotplug
3426 * @work: Pointer to ATA port to perform SCSI hotplug on
3428 * Perform SCSI part of hotplug. It's executed from a separate
3429 * workqueue after EH completes. This is necessary because SCSI
3430 * hot plugging requires working EH and hot unplugging is
3431 * synchronized with hot plugging with a mutex.
3434 * Kernel thread context (may sleep).
3436 void ata_scsi_hotplug(struct work_struct
*work
)
3438 struct ata_port
*ap
=
3439 container_of(work
, struct ata_port
, hotplug_task
.work
);
3442 if (ap
->pflags
& ATA_PFLAG_UNLOADING
) {
3443 DPRINTK("ENTER/EXIT - unloading\n");
3449 /* Unplug detached devices. We cannot use link iterator here
3450 * because PMP links have to be scanned even if PMP is
3451 * currently not attached. Iterate manually.
3453 ata_scsi_handle_link_detach(&ap
->link
);
3455 for (i
= 0; i
< SATA_PMP_MAX_PORTS
; i
++)
3456 ata_scsi_handle_link_detach(&ap
->pmp_link
[i
]);
3458 /* scan for new ones */
3459 ata_scsi_scan_host(ap
, 0);
3465 * ata_scsi_user_scan - indication for user-initiated bus scan
3466 * @shost: SCSI host to scan
3467 * @channel: Channel to scan
3471 * This function is called when user explicitly requests bus
3472 * scan. Set probe pending flag and invoke EH.
3475 * SCSI layer (we don't care)
3480 static int ata_scsi_user_scan(struct Scsi_Host
*shost
, unsigned int channel
,
3481 unsigned int id
, unsigned int lun
)
3483 struct ata_port
*ap
= ata_shost_to_port(shost
);
3484 unsigned long flags
;
3487 if (!ap
->ops
->error_handler
)
3490 if (lun
!= SCAN_WILD_CARD
&& lun
)
3493 if (!sata_pmp_attached(ap
)) {
3494 if (channel
!= SCAN_WILD_CARD
&& channel
)
3498 if (id
!= SCAN_WILD_CARD
&& id
)
3503 spin_lock_irqsave(ap
->lock
, flags
);
3505 if (devno
== SCAN_WILD_CARD
) {
3506 struct ata_link
*link
;
3508 ata_port_for_each_link(link
, ap
) {
3509 struct ata_eh_info
*ehi
= &link
->eh_info
;
3510 ehi
->probe_mask
|= ATA_ALL_DEVICES
;
3511 ehi
->action
|= ATA_EH_RESET
;
3514 struct ata_device
*dev
= ata_find_dev(ap
, devno
);
3517 struct ata_eh_info
*ehi
= &dev
->link
->eh_info
;
3518 ehi
->probe_mask
|= 1 << dev
->devno
;
3519 ehi
->action
|= ATA_EH_RESET
;
3525 ata_port_schedule_eh(ap
);
3526 spin_unlock_irqrestore(ap
->lock
, flags
);
3527 ata_port_wait_eh(ap
);
3529 spin_unlock_irqrestore(ap
->lock
, flags
);
3535 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
3536 * @work: Pointer to ATA port to perform scsi_rescan_device()
3538 * After ATA pass thru (SAT) commands are executed successfully,
3539 * libata need to propagate the changes to SCSI layer. This
3540 * function must be executed from ata_aux_wq such that sdev
3541 * attach/detach don't race with rescan.
3544 * Kernel thread context (may sleep).
3546 void ata_scsi_dev_rescan(struct work_struct
*work
)
3548 struct ata_port
*ap
=
3549 container_of(work
, struct ata_port
, scsi_rescan_task
);
3550 struct ata_link
*link
;
3551 struct ata_device
*dev
;
3552 unsigned long flags
;
3554 spin_lock_irqsave(ap
->lock
, flags
);
3556 ata_port_for_each_link(link
, ap
) {
3557 ata_link_for_each_dev(dev
, link
) {
3558 struct scsi_device
*sdev
= dev
->sdev
;
3560 if (!ata_dev_enabled(dev
) || !sdev
)
3562 if (scsi_device_get(sdev
))
3565 spin_unlock_irqrestore(ap
->lock
, flags
);
3566 scsi_rescan_device(&(sdev
->sdev_gendev
));
3567 scsi_device_put(sdev
);
3568 spin_lock_irqsave(ap
->lock
, flags
);
3572 spin_unlock_irqrestore(ap
->lock
, flags
);
3576 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
3577 * @host: ATA host container for all SAS ports
3578 * @port_info: Information from low-level host driver
3579 * @shost: SCSI host that the scsi device is attached to
3582 * PCI/etc. bus probe sem.
3585 * ata_port pointer on success / NULL on failure.
3588 struct ata_port
*ata_sas_port_alloc(struct ata_host
*host
,
3589 struct ata_port_info
*port_info
,
3590 struct Scsi_Host
*shost
)
3592 struct ata_port
*ap
;
3594 ap
= ata_port_alloc(host
);
3599 ap
->lock
= shost
->host_lock
;
3600 ap
->pio_mask
= port_info
->pio_mask
;
3601 ap
->mwdma_mask
= port_info
->mwdma_mask
;
3602 ap
->udma_mask
= port_info
->udma_mask
;
3603 ap
->flags
|= port_info
->flags
;
3604 ap
->ops
= port_info
->port_ops
;
3605 ap
->cbl
= ATA_CBL_SATA
;
3609 EXPORT_SYMBOL_GPL(ata_sas_port_alloc
);
3612 * ata_sas_port_start - Set port up for dma.
3613 * @ap: Port to initialize
3615 * Called just after data structures for each port are
3618 * May be used as the port_start() entry in ata_port_operations.
3621 * Inherited from caller.
3623 int ata_sas_port_start(struct ata_port
*ap
)
3627 EXPORT_SYMBOL_GPL(ata_sas_port_start
);
3630 * ata_port_stop - Undo ata_sas_port_start()
3631 * @ap: Port to shut down
3633 * May be used as the port_stop() entry in ata_port_operations.
3636 * Inherited from caller.
3639 void ata_sas_port_stop(struct ata_port
*ap
)
3642 EXPORT_SYMBOL_GPL(ata_sas_port_stop
);
3645 * ata_sas_port_init - Initialize a SATA device
3646 * @ap: SATA port to initialize
3649 * PCI/etc. bus probe sem.
3652 * Zero on success, non-zero on error.
3655 int ata_sas_port_init(struct ata_port
*ap
)
3657 int rc
= ap
->ops
->port_start(ap
);
3660 ap
->print_id
= ata_print_id
++;
3661 rc
= ata_bus_probe(ap
);
3666 EXPORT_SYMBOL_GPL(ata_sas_port_init
);
3669 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3670 * @ap: SATA port to destroy
3674 void ata_sas_port_destroy(struct ata_port
*ap
)
3676 if (ap
->ops
->port_stop
)
3677 ap
->ops
->port_stop(ap
);
3680 EXPORT_SYMBOL_GPL(ata_sas_port_destroy
);
3683 * ata_sas_slave_configure - Default slave_config routine for libata devices
3684 * @sdev: SCSI device to configure
3685 * @ap: ATA port to which SCSI device is attached
3691 int ata_sas_slave_configure(struct scsi_device
*sdev
, struct ata_port
*ap
)
3693 ata_scsi_sdev_config(sdev
);
3694 ata_scsi_dev_config(sdev
, ap
->link
.device
);
3697 EXPORT_SYMBOL_GPL(ata_sas_slave_configure
);
3700 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3701 * @cmd: SCSI command to be sent
3702 * @done: Completion function, called when command is complete
3703 * @ap: ATA port to which the command is being sent
3706 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3710 int ata_sas_queuecmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*),
3711 struct ata_port
*ap
)
3715 ata_scsi_dump_cdb(ap
, cmd
);
3717 if (likely(ata_dev_enabled(ap
->link
.device
)))
3718 rc
= __ata_scsi_queuecmd(cmd
, done
, ap
->link
.device
);
3720 cmd
->result
= (DID_BAD_TARGET
<< 16);
3725 EXPORT_SYMBOL_GPL(ata_sas_queuecmd
);