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
;
193 unsigned long flags
, now
;
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
) {
212 if (ap
->pflags
& ATA_PFLAG_EH_IN_PROGRESS
&&
213 link
->eh_context
.unloaded_mask
& (1 << dev
->devno
) &&
214 time_after(dev
->unpark_deadline
, now
))
215 msecs
= jiffies_to_msecs(dev
->unpark_deadline
- now
);
220 spin_unlock_irq(ap
->lock
);
222 return rc
? rc
: snprintf(buf
, 20, "%u\n", msecs
);
225 static ssize_t
ata_scsi_park_store(struct device
*device
,
226 struct device_attribute
*attr
,
227 const char *buf
, size_t len
)
229 struct scsi_device
*sdev
= to_scsi_device(device
);
231 struct ata_device
*dev
;
236 rc
= strict_strtol(buf
, 10, &input
);
237 if (rc
|| input
< -2)
239 if (input
> ATA_TMOUT_MAX_PARK
) {
241 input
= ATA_TMOUT_MAX_PARK
;
244 ap
= ata_shost_to_port(sdev
->host
);
246 spin_lock_irqsave(ap
->lock
, flags
);
247 dev
= ata_scsi_find_dev(ap
, sdev
);
248 if (unlikely(!dev
)) {
252 if (dev
->class != ATA_DEV_ATA
) {
258 if (dev
->flags
& ATA_DFLAG_NO_UNLOAD
) {
263 dev
->unpark_deadline
= ata_deadline(jiffies
, input
);
264 dev
->link
->eh_info
.dev_action
[dev
->devno
] |= ATA_EH_PARK
;
265 ata_port_schedule_eh(ap
);
266 complete(&ap
->park_req_pending
);
270 dev
->flags
&= ~ATA_DFLAG_NO_UNLOAD
;
273 dev
->flags
|= ATA_DFLAG_NO_UNLOAD
;
278 spin_unlock_irqrestore(ap
->lock
, flags
);
280 return rc
? rc
: len
;
282 DEVICE_ATTR(unload_heads
, S_IRUGO
| S_IWUSR
,
283 ata_scsi_park_show
, ata_scsi_park_store
);
284 EXPORT_SYMBOL_GPL(dev_attr_unload_heads
);
286 static void ata_scsi_set_sense(struct scsi_cmnd
*cmd
, u8 sk
, u8 asc
, u8 ascq
)
288 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
290 scsi_build_sense_buffer(0, cmd
->sense_buffer
, sk
, asc
, ascq
);
294 ata_scsi_em_message_store(struct device
*dev
, struct device_attribute
*attr
,
295 const char *buf
, size_t count
)
297 struct Scsi_Host
*shost
= class_to_shost(dev
);
298 struct ata_port
*ap
= ata_shost_to_port(shost
);
299 if (ap
->ops
->em_store
&& (ap
->flags
& ATA_FLAG_EM
))
300 return ap
->ops
->em_store(ap
, buf
, count
);
305 ata_scsi_em_message_show(struct device
*dev
, struct device_attribute
*attr
,
308 struct Scsi_Host
*shost
= class_to_shost(dev
);
309 struct ata_port
*ap
= ata_shost_to_port(shost
);
311 if (ap
->ops
->em_show
&& (ap
->flags
& ATA_FLAG_EM
))
312 return ap
->ops
->em_show(ap
, buf
);
315 DEVICE_ATTR(em_message
, S_IRUGO
| S_IWUGO
,
316 ata_scsi_em_message_show
, ata_scsi_em_message_store
);
317 EXPORT_SYMBOL_GPL(dev_attr_em_message
);
320 ata_scsi_em_message_type_show(struct device
*dev
, struct device_attribute
*attr
,
323 struct Scsi_Host
*shost
= class_to_shost(dev
);
324 struct ata_port
*ap
= ata_shost_to_port(shost
);
326 return snprintf(buf
, 23, "%d\n", ap
->em_message_type
);
328 DEVICE_ATTR(em_message_type
, S_IRUGO
,
329 ata_scsi_em_message_type_show
, NULL
);
330 EXPORT_SYMBOL_GPL(dev_attr_em_message_type
);
333 ata_scsi_activity_show(struct device
*dev
, struct device_attribute
*attr
,
336 struct scsi_device
*sdev
= to_scsi_device(dev
);
337 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
338 struct ata_device
*atadev
= ata_scsi_find_dev(ap
, sdev
);
340 if (ap
->ops
->sw_activity_show
&& (ap
->flags
& ATA_FLAG_SW_ACTIVITY
))
341 return ap
->ops
->sw_activity_show(atadev
, buf
);
346 ata_scsi_activity_store(struct device
*dev
, struct device_attribute
*attr
,
347 const char *buf
, size_t count
)
349 struct scsi_device
*sdev
= to_scsi_device(dev
);
350 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
351 struct ata_device
*atadev
= ata_scsi_find_dev(ap
, sdev
);
352 enum sw_activity val
;
355 if (ap
->ops
->sw_activity_store
&& (ap
->flags
& ATA_FLAG_SW_ACTIVITY
)) {
356 val
= simple_strtoul(buf
, NULL
, 0);
358 case OFF
: case BLINK_ON
: case BLINK_OFF
:
359 rc
= ap
->ops
->sw_activity_store(atadev
, val
);
368 DEVICE_ATTR(sw_activity
, S_IWUGO
| S_IRUGO
, ata_scsi_activity_show
,
369 ata_scsi_activity_store
);
370 EXPORT_SYMBOL_GPL(dev_attr_sw_activity
);
372 struct device_attribute
*ata_common_sdev_attrs
[] = {
373 &dev_attr_unload_heads
,
376 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs
);
378 static void ata_scsi_invalid_field(struct scsi_cmnd
*cmd
,
379 void (*done
)(struct scsi_cmnd
*))
381 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
382 /* "Invalid field in cbd" */
387 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
388 * @sdev: SCSI device for which BIOS geometry is to be determined
389 * @bdev: block device associated with @sdev
390 * @capacity: capacity of SCSI device
391 * @geom: location to which geometry will be output
393 * Generic bios head/sector/cylinder calculator
394 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
395 * mapping. Some situations may arise where the disk is not
396 * bootable if this is not used.
399 * Defined by the SCSI layer. We don't really care.
404 int ata_std_bios_param(struct scsi_device
*sdev
, struct block_device
*bdev
,
405 sector_t capacity
, int geom
[])
409 sector_div(capacity
, 255*63);
416 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
417 * @sdev: SCSI device to get identify data for
418 * @arg: User buffer area for identify data
421 * Defined by the SCSI layer. We don't really care.
424 * Zero on success, negative errno on error.
426 static int ata_get_identity(struct scsi_device
*sdev
, void __user
*arg
)
428 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
429 struct ata_device
*dev
= ata_scsi_find_dev(ap
, sdev
);
430 u16 __user
*dst
= arg
;
436 if (copy_to_user(dst
, dev
->id
, ATA_ID_WORDS
* sizeof(u16
)))
439 ata_id_string(dev
->id
, buf
, ATA_ID_PROD
, ATA_ID_PROD_LEN
);
440 if (copy_to_user(dst
+ ATA_ID_PROD
, buf
, ATA_ID_PROD_LEN
))
443 ata_id_string(dev
->id
, buf
, ATA_ID_FW_REV
, ATA_ID_FW_REV_LEN
);
444 if (copy_to_user(dst
+ ATA_ID_FW_REV
, buf
, ATA_ID_FW_REV_LEN
))
447 ata_id_string(dev
->id
, buf
, ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
448 if (copy_to_user(dst
+ ATA_ID_SERNO
, buf
, ATA_ID_SERNO_LEN
))
455 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
456 * @scsidev: Device to which we are issuing command
457 * @arg: User provided data for issuing command
460 * Defined by the SCSI layer. We don't really care.
463 * Zero on success, negative errno on error.
465 int ata_cmd_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
468 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
469 u8 args
[4], *argbuf
= NULL
, *sensebuf
= NULL
;
471 enum dma_data_direction data_dir
;
477 if (copy_from_user(args
, arg
, sizeof(args
)))
480 sensebuf
= kzalloc(SCSI_SENSE_BUFFERSIZE
, GFP_NOIO
);
484 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
487 argsize
= SECTOR_SIZE
* args
[3];
488 argbuf
= kmalloc(argsize
, GFP_KERNEL
);
489 if (argbuf
== NULL
) {
494 scsi_cmd
[1] = (4 << 1); /* PIO Data-in */
495 scsi_cmd
[2] = 0x0e; /* no off.line or cc, read from dev,
496 block count in sector count field */
497 data_dir
= DMA_FROM_DEVICE
;
499 scsi_cmd
[1] = (3 << 1); /* Non-data */
500 scsi_cmd
[2] = 0x20; /* cc but no off.line or data xfer */
504 scsi_cmd
[0] = ATA_16
;
506 scsi_cmd
[4] = args
[2];
507 if (args
[0] == ATA_CMD_SMART
) { /* hack -- ide driver does this too */
508 scsi_cmd
[6] = args
[3];
509 scsi_cmd
[8] = args
[1];
513 scsi_cmd
[6] = args
[1];
515 scsi_cmd
[14] = args
[0];
517 /* Good values for timeout and retries? Values below
518 from scsi_ioctl_send_command() for default case... */
519 cmd_result
= scsi_execute(scsidev
, scsi_cmd
, data_dir
, argbuf
, argsize
,
520 sensebuf
, (10*HZ
), 5, 0);
522 if (driver_byte(cmd_result
) == DRIVER_SENSE
) {/* sense data available */
523 u8
*desc
= sensebuf
+ 8;
524 cmd_result
&= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
526 /* If we set cc then ATA pass-through will cause a
527 * check condition even if no error. Filter that. */
528 if (cmd_result
& SAM_STAT_CHECK_CONDITION
) {
529 struct scsi_sense_hdr sshdr
;
530 scsi_normalize_sense(sensebuf
, SCSI_SENSE_BUFFERSIZE
,
532 if (sshdr
.sense_key
== 0 &&
533 sshdr
.asc
== 0 && sshdr
.ascq
== 0)
534 cmd_result
&= ~SAM_STAT_CHECK_CONDITION
;
537 /* Send userspace a few ATA registers (same as drivers/ide) */
538 if (sensebuf
[0] == 0x72 && /* format is "descriptor" */
539 desc
[0] == 0x09) { /* code is "ATA Descriptor" */
540 args
[0] = desc
[13]; /* status */
541 args
[1] = desc
[3]; /* error */
542 args
[2] = desc
[5]; /* sector count (0:7) */
543 if (copy_to_user(arg
, args
, sizeof(args
)))
555 && copy_to_user(arg
+ sizeof(args
), argbuf
, argsize
))
564 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
565 * @scsidev: Device to which we are issuing command
566 * @arg: User provided data for issuing command
569 * Defined by the SCSI layer. We don't really care.
572 * Zero on success, negative errno on error.
574 int ata_task_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
577 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
578 u8 args
[7], *sensebuf
= NULL
;
584 if (copy_from_user(args
, arg
, sizeof(args
)))
587 sensebuf
= kzalloc(SCSI_SENSE_BUFFERSIZE
, GFP_NOIO
);
591 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
592 scsi_cmd
[0] = ATA_16
;
593 scsi_cmd
[1] = (3 << 1); /* Non-data */
594 scsi_cmd
[2] = 0x20; /* cc but no off.line or data xfer */
595 scsi_cmd
[4] = args
[1];
596 scsi_cmd
[6] = args
[2];
597 scsi_cmd
[8] = args
[3];
598 scsi_cmd
[10] = args
[4];
599 scsi_cmd
[12] = args
[5];
600 scsi_cmd
[13] = args
[6] & 0x4f;
601 scsi_cmd
[14] = args
[0];
603 /* Good values for timeout and retries? Values below
604 from scsi_ioctl_send_command() for default case... */
605 cmd_result
= scsi_execute(scsidev
, scsi_cmd
, DMA_NONE
, NULL
, 0,
606 sensebuf
, (10*HZ
), 5, 0);
608 if (driver_byte(cmd_result
) == DRIVER_SENSE
) {/* sense data available */
609 u8
*desc
= sensebuf
+ 8;
610 cmd_result
&= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
612 /* If we set cc then ATA pass-through will cause a
613 * check condition even if no error. Filter that. */
614 if (cmd_result
& SAM_STAT_CHECK_CONDITION
) {
615 struct scsi_sense_hdr sshdr
;
616 scsi_normalize_sense(sensebuf
, SCSI_SENSE_BUFFERSIZE
,
618 if (sshdr
.sense_key
== 0 &&
619 sshdr
.asc
== 0 && sshdr
.ascq
== 0)
620 cmd_result
&= ~SAM_STAT_CHECK_CONDITION
;
623 /* Send userspace ATA registers */
624 if (sensebuf
[0] == 0x72 && /* format is "descriptor" */
625 desc
[0] == 0x09) {/* code is "ATA Descriptor" */
626 args
[0] = desc
[13]; /* status */
627 args
[1] = desc
[3]; /* error */
628 args
[2] = desc
[5]; /* sector count (0:7) */
629 args
[3] = desc
[7]; /* lbal */
630 args
[4] = desc
[9]; /* lbam */
631 args
[5] = desc
[11]; /* lbah */
632 args
[6] = desc
[12]; /* select */
633 if (copy_to_user(arg
, args
, sizeof(args
)))
648 int ata_scsi_ioctl(struct scsi_device
*scsidev
, int cmd
, void __user
*arg
)
650 int val
= -EINVAL
, rc
= -EINVAL
;
653 case ATA_IOC_GET_IO32
:
655 if (copy_to_user(arg
, &val
, 1))
659 case ATA_IOC_SET_IO32
:
660 val
= (unsigned long) arg
;
665 case HDIO_GET_IDENTITY
:
666 return ata_get_identity(scsidev
, arg
);
669 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
671 return ata_cmd_ioctl(scsidev
, arg
);
673 case HDIO_DRIVE_TASK
:
674 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
676 return ata_task_ioctl(scsidev
, arg
);
687 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
688 * @dev: ATA device to which the new command is attached
689 * @cmd: SCSI command that originated this ATA command
690 * @done: SCSI command completion function
692 * Obtain a reference to an unused ata_queued_cmd structure,
693 * which is the basic libata structure representing a single
694 * ATA command sent to the hardware.
696 * If a command was available, fill in the SCSI-specific
697 * portions of the structure with information on the
701 * spin_lock_irqsave(host lock)
704 * Command allocated, or %NULL if none available.
706 static struct ata_queued_cmd
*ata_scsi_qc_new(struct ata_device
*dev
,
707 struct scsi_cmnd
*cmd
,
708 void (*done
)(struct scsi_cmnd
*))
710 struct ata_queued_cmd
*qc
;
712 if (cmd
->request
->tag
!= -1)
713 qc
= ata_qc_new_init(dev
, cmd
->request
->tag
);
715 qc
= ata_qc_new_init(dev
, 0);
721 qc
->sg
= scsi_sglist(cmd
);
722 qc
->n_elem
= scsi_sg_count(cmd
);
724 cmd
->result
= (DID_OK
<< 16) | (QUEUE_FULL
<< 1);
731 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd
*qc
)
733 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
735 qc
->extrabytes
= scmd
->request
->extra_len
;
736 qc
->nbytes
= scsi_bufflen(scmd
) + qc
->extrabytes
;
740 * ata_dump_status - user friendly display of error info
741 * @id: id of the port in question
742 * @tf: ptr to filled out taskfile
744 * Decode and dump the ATA error/status registers for the user so
745 * that they have some idea what really happened at the non
746 * make-believe layer.
749 * inherited from caller
751 static void ata_dump_status(unsigned id
, struct ata_taskfile
*tf
)
753 u8 stat
= tf
->command
, err
= tf
->feature
;
755 printk(KERN_WARNING
"ata%u: status=0x%02x { ", id
, stat
);
756 if (stat
& ATA_BUSY
) {
757 printk("Busy }\n"); /* Data is not valid in this case */
759 if (stat
& 0x40) printk("DriveReady ");
760 if (stat
& 0x20) printk("DeviceFault ");
761 if (stat
& 0x10) printk("SeekComplete ");
762 if (stat
& 0x08) printk("DataRequest ");
763 if (stat
& 0x04) printk("CorrectedError ");
764 if (stat
& 0x02) printk("Index ");
765 if (stat
& 0x01) printk("Error ");
769 printk(KERN_WARNING
"ata%u: error=0x%02x { ", id
, err
);
770 if (err
& 0x04) printk("DriveStatusError ");
772 if (err
& 0x04) printk("BadCRC ");
773 else printk("Sector ");
775 if (err
& 0x40) printk("UncorrectableError ");
776 if (err
& 0x10) printk("SectorIdNotFound ");
777 if (err
& 0x02) printk("TrackZeroNotFound ");
778 if (err
& 0x01) printk("AddrMarkNotFound ");
785 * ata_to_sense_error - convert ATA error to SCSI error
786 * @id: ATA device number
787 * @drv_stat: value contained in ATA status register
788 * @drv_err: value contained in ATA error register
789 * @sk: the sense key we'll fill out
790 * @asc: the additional sense code we'll fill out
791 * @ascq: the additional sense code qualifier we'll fill out
792 * @verbose: be verbose
794 * Converts an ATA error into a SCSI error. Fill out pointers to
795 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
796 * format sense blocks.
799 * spin_lock_irqsave(host lock)
801 static void ata_to_sense_error(unsigned id
, u8 drv_stat
, u8 drv_err
, u8
*sk
,
802 u8
*asc
, u8
*ascq
, int verbose
)
806 /* Based on the 3ware driver translation table */
807 static const unsigned char sense_table
[][4] = {
809 {0xd1, ABORTED_COMMAND
, 0x00, 0x00}, // Device busy Aborted command
811 {0xd0, ABORTED_COMMAND
, 0x00, 0x00}, // Device busy Aborted command
813 {0x61, HARDWARE_ERROR
, 0x00, 0x00}, // Device fault Hardware error
814 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
815 {0x84, ABORTED_COMMAND
, 0x47, 0x00}, // Data CRC error SCSI parity error
816 /* MC|ID|ABRT|TRK0|MARK */
817 {0x37, NOT_READY
, 0x04, 0x00}, // Unit offline Not ready
819 {0x09, NOT_READY
, 0x04, 0x00}, // Unrecovered disk error Not ready
820 /* Bad address mark */
821 {0x01, MEDIUM_ERROR
, 0x13, 0x00}, // Address mark not found Address mark not found for data field
823 {0x02, HARDWARE_ERROR
, 0x00, 0x00}, // Track 0 not found Hardware error
825 {0x04, ABORTED_COMMAND
, 0x00, 0x00}, // Aborted command Aborted command
826 /* Media change request */
827 {0x08, NOT_READY
, 0x04, 0x00}, // Media change request FIXME: faking offline
829 {0x10, ABORTED_COMMAND
, 0x14, 0x00}, // ID not found Recorded entity not found
831 {0x08, NOT_READY
, 0x04, 0x00}, // Media change FIXME: faking offline
833 {0x40, MEDIUM_ERROR
, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
834 /* BBD - block marked bad */
835 {0x80, MEDIUM_ERROR
, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
836 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
838 static const unsigned char stat_table
[][4] = {
839 /* Must be first because BUSY means no other bits valid */
840 {0x80, ABORTED_COMMAND
, 0x47, 0x00}, // Busy, fake parity for now
841 {0x20, HARDWARE_ERROR
, 0x00, 0x00}, // Device fault
842 {0x08, ABORTED_COMMAND
, 0x47, 0x00}, // Timed out in xfer, fake parity for now
843 {0x04, RECOVERED_ERROR
, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
844 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
848 * Is this an error we can process/parse
850 if (drv_stat
& ATA_BUSY
) {
851 drv_err
= 0; /* Ignore the err bits, they're invalid */
855 /* Look for drv_err */
856 for (i
= 0; sense_table
[i
][0] != 0xFF; i
++) {
857 /* Look for best matches first */
858 if ((sense_table
[i
][0] & drv_err
) ==
860 *sk
= sense_table
[i
][1];
861 *asc
= sense_table
[i
][2];
862 *ascq
= sense_table
[i
][3];
866 /* No immediate match */
868 printk(KERN_WARNING
"ata%u: no sense translation for "
869 "error 0x%02x\n", id
, drv_err
);
872 /* Fall back to interpreting status bits */
873 for (i
= 0; stat_table
[i
][0] != 0xFF; i
++) {
874 if (stat_table
[i
][0] & drv_stat
) {
875 *sk
= stat_table
[i
][1];
876 *asc
= stat_table
[i
][2];
877 *ascq
= stat_table
[i
][3];
881 /* No error? Undecoded? */
883 printk(KERN_WARNING
"ata%u: no sense translation for "
884 "status: 0x%02x\n", id
, drv_stat
);
886 /* We need a sensible error return here, which is tricky, and one
887 that won't cause people to do things like return a disk wrongly */
888 *sk
= ABORTED_COMMAND
;
894 printk(KERN_ERR
"ata%u: translated ATA stat/err 0x%02x/%02x "
895 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
896 id
, drv_stat
, drv_err
, *sk
, *asc
, *ascq
);
901 * ata_gen_passthru_sense - Generate check condition sense block.
902 * @qc: Command that completed.
904 * This function is specific to the ATA descriptor format sense
905 * block specified for the ATA pass through commands. Regardless
906 * of whether the command errored or not, return a sense
907 * block. Copy all controller registers into the sense
908 * block. Clear sense key, ASC & ASCQ if there is no error.
913 static void ata_gen_passthru_sense(struct ata_queued_cmd
*qc
)
915 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
916 struct ata_taskfile
*tf
= &qc
->result_tf
;
917 unsigned char *sb
= cmd
->sense_buffer
;
918 unsigned char *desc
= sb
+ 8;
919 int verbose
= qc
->ap
->ops
->error_handler
== NULL
;
921 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
923 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
926 * Use ata_to_sense_error() to map status register bits
927 * onto sense key, asc & ascq.
930 tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
931 ata_to_sense_error(qc
->ap
->print_id
, tf
->command
, tf
->feature
,
932 &sb
[1], &sb
[2], &sb
[3], verbose
);
937 * Sense data is current and format is descriptor.
943 /* set length of additional sense data */
948 * Copy registers into sense buffer.
951 desc
[3] = tf
->feature
; /* == error reg */
956 desc
[12] = tf
->device
;
957 desc
[13] = tf
->command
; /* == status reg */
960 * Fill in Extend bit, and the high order bytes
963 if (tf
->flags
& ATA_TFLAG_LBA48
) {
965 desc
[4] = tf
->hob_nsect
;
966 desc
[6] = tf
->hob_lbal
;
967 desc
[8] = tf
->hob_lbam
;
968 desc
[10] = tf
->hob_lbah
;
973 * ata_gen_ata_sense - generate a SCSI fixed sense block
974 * @qc: Command that we are erroring out
976 * Generate sense block for a failed ATA command @qc. Descriptor
977 * format is used to accomodate LBA48 block address.
982 static void ata_gen_ata_sense(struct ata_queued_cmd
*qc
)
984 struct ata_device
*dev
= qc
->dev
;
985 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
986 struct ata_taskfile
*tf
= &qc
->result_tf
;
987 unsigned char *sb
= cmd
->sense_buffer
;
988 unsigned char *desc
= sb
+ 8;
989 int verbose
= qc
->ap
->ops
->error_handler
== NULL
;
992 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
994 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
996 /* sense data is current and format is descriptor */
999 /* Use ata_to_sense_error() to map status register bits
1000 * onto sense key, asc & ascq.
1003 tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
1004 ata_to_sense_error(qc
->ap
->print_id
, tf
->command
, tf
->feature
,
1005 &sb
[1], &sb
[2], &sb
[3], verbose
);
1009 block
= ata_tf_read_block(&qc
->result_tf
, dev
);
1011 /* information sense data descriptor */
1016 desc
[2] |= 0x80; /* valid */
1017 desc
[6] = block
>> 40;
1018 desc
[7] = block
>> 32;
1019 desc
[8] = block
>> 24;
1020 desc
[9] = block
>> 16;
1021 desc
[10] = block
>> 8;
1025 static void ata_scsi_sdev_config(struct scsi_device
*sdev
)
1027 sdev
->use_10_for_rw
= 1;
1028 sdev
->use_10_for_ms
= 1;
1030 /* Schedule policy is determined by ->qc_defer() callback and
1031 * it needs to see every deferred qc. Set dev_blocked to 1 to
1032 * prevent SCSI midlayer from automatically deferring
1035 sdev
->max_device_blocked
= 1;
1039 * atapi_drain_needed - Check whether data transfer may overflow
1040 * @rq: request to be checked
1042 * ATAPI commands which transfer variable length data to host
1043 * might overflow due to application error or hardare bug. This
1044 * function checks whether overflow should be drained and ignored
1051 * 1 if ; otherwise, 0.
1053 static int atapi_drain_needed(struct request
*rq
)
1055 if (likely(!blk_pc_request(rq
)))
1058 if (!rq
->data_len
|| (rq
->cmd_flags
& REQ_RW
))
1061 return atapi_cmd_type(rq
->cmd
[0]) == ATAPI_MISC
;
1064 static int ata_scsi_dev_config(struct scsi_device
*sdev
,
1065 struct ata_device
*dev
)
1067 if (!ata_id_has_unload(dev
->id
))
1068 dev
->flags
|= ATA_DFLAG_NO_UNLOAD
;
1070 /* configure max sectors */
1071 blk_queue_max_sectors(sdev
->request_queue
, dev
->max_sectors
);
1073 if (dev
->class == ATA_DEV_ATAPI
) {
1074 struct request_queue
*q
= sdev
->request_queue
;
1077 /* set the min alignment and padding */
1078 blk_queue_update_dma_alignment(sdev
->request_queue
,
1079 ATA_DMA_PAD_SZ
- 1);
1080 blk_queue_update_dma_pad(sdev
->request_queue
,
1081 ATA_DMA_PAD_SZ
- 1);
1083 /* configure draining */
1084 buf
= kmalloc(ATAPI_MAX_DRAIN
, q
->bounce_gfp
| GFP_KERNEL
);
1086 ata_dev_printk(dev
, KERN_ERR
,
1087 "drain buffer allocation failed\n");
1091 blk_queue_dma_drain(q
, atapi_drain_needed
, buf
, ATAPI_MAX_DRAIN
);
1093 if (ata_id_is_ssd(dev
->id
))
1094 queue_flag_set_unlocked(QUEUE_FLAG_NONROT
,
1095 sdev
->request_queue
);
1097 /* ATA devices must be sector aligned */
1098 blk_queue_update_dma_alignment(sdev
->request_queue
,
1100 sdev
->manage_start_stop
= 1;
1103 if (dev
->flags
& ATA_DFLAG_AN
)
1104 set_bit(SDEV_EVT_MEDIA_CHANGE
, sdev
->supported_events
);
1106 if (dev
->flags
& ATA_DFLAG_NCQ
) {
1109 depth
= min(sdev
->host
->can_queue
, ata_id_queue_depth(dev
->id
));
1110 depth
= min(ATA_MAX_QUEUE
- 1, depth
);
1113 * If this device is behind a port multiplier, we have
1114 * to share the tag map between all devices on that PMP.
1115 * Set up the shared tag map here and we get automatic.
1117 if (dev
->link
->ap
->pmp_link
)
1118 scsi_init_shared_tag_map(sdev
->host
, ATA_MAX_QUEUE
- 1);
1120 scsi_set_tag_type(sdev
, MSG_SIMPLE_TAG
);
1121 scsi_activate_tcq(sdev
, depth
);
1128 * ata_scsi_slave_config - Set SCSI device attributes
1129 * @sdev: SCSI device to examine
1131 * This is called before we actually start reading
1132 * and writing to the device, to configure certain
1133 * SCSI mid-layer behaviors.
1136 * Defined by SCSI layer. We don't really care.
1139 int ata_scsi_slave_config(struct scsi_device
*sdev
)
1141 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1142 struct ata_device
*dev
= __ata_scsi_find_dev(ap
, sdev
);
1145 ata_scsi_sdev_config(sdev
);
1148 rc
= ata_scsi_dev_config(sdev
, dev
);
1154 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1155 * @sdev: SCSI device to be destroyed
1157 * @sdev is about to be destroyed for hot/warm unplugging. If
1158 * this unplugging was initiated by libata as indicated by NULL
1159 * dev->sdev, this function doesn't have to do anything.
1160 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1161 * Clear dev->sdev, schedule the device for ATA detach and invoke
1165 * Defined by SCSI layer. We don't really care.
1167 void ata_scsi_slave_destroy(struct scsi_device
*sdev
)
1169 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1170 struct request_queue
*q
= sdev
->request_queue
;
1171 unsigned long flags
;
1172 struct ata_device
*dev
;
1174 if (!ap
->ops
->error_handler
)
1177 spin_lock_irqsave(ap
->lock
, flags
);
1178 dev
= __ata_scsi_find_dev(ap
, sdev
);
1179 if (dev
&& dev
->sdev
) {
1180 /* SCSI device already in CANCEL state, no need to offline it */
1182 dev
->flags
|= ATA_DFLAG_DETACH
;
1183 ata_port_schedule_eh(ap
);
1185 spin_unlock_irqrestore(ap
->lock
, flags
);
1187 kfree(q
->dma_drain_buffer
);
1188 q
->dma_drain_buffer
= NULL
;
1189 q
->dma_drain_size
= 0;
1193 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1194 * @sdev: SCSI device to configure queue depth for
1195 * @queue_depth: new queue depth
1197 * This is libata standard hostt->change_queue_depth callback.
1198 * SCSI will call into this callback when user tries to set queue
1202 * SCSI layer (we don't care)
1205 * Newly configured queue depth.
1207 int ata_scsi_change_queue_depth(struct scsi_device
*sdev
, int queue_depth
)
1209 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1210 struct ata_device
*dev
;
1211 unsigned long flags
;
1213 if (queue_depth
< 1 || queue_depth
== sdev
->queue_depth
)
1214 return sdev
->queue_depth
;
1216 dev
= ata_scsi_find_dev(ap
, sdev
);
1217 if (!dev
|| !ata_dev_enabled(dev
))
1218 return sdev
->queue_depth
;
1221 spin_lock_irqsave(ap
->lock
, flags
);
1222 dev
->flags
&= ~ATA_DFLAG_NCQ_OFF
;
1223 if (queue_depth
== 1 || !ata_ncq_enabled(dev
)) {
1224 dev
->flags
|= ATA_DFLAG_NCQ_OFF
;
1227 spin_unlock_irqrestore(ap
->lock
, flags
);
1229 /* limit and apply queue depth */
1230 queue_depth
= min(queue_depth
, sdev
->host
->can_queue
);
1231 queue_depth
= min(queue_depth
, ata_id_queue_depth(dev
->id
));
1232 queue_depth
= min(queue_depth
, ATA_MAX_QUEUE
- 1);
1234 if (sdev
->queue_depth
== queue_depth
)
1237 scsi_adjust_queue_depth(sdev
, MSG_SIMPLE_TAG
, queue_depth
);
1241 /* XXX: for spindown warning */
1242 static void ata_delayed_done_timerfn(unsigned long arg
)
1244 struct scsi_cmnd
*scmd
= (void *)arg
;
1246 scmd
->scsi_done(scmd
);
1249 /* XXX: for spindown warning */
1250 static void ata_delayed_done(struct scsi_cmnd
*scmd
)
1252 static struct timer_list timer
;
1254 setup_timer(&timer
, ata_delayed_done_timerfn
, (unsigned long)scmd
);
1255 mod_timer(&timer
, jiffies
+ 5 * HZ
);
1259 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1260 * @qc: Storage for translated ATA taskfile
1262 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1263 * (to start). Perhaps these commands should be preceded by
1264 * CHECK POWER MODE to see what power mode the device is already in.
1265 * [See SAT revision 5 at www.t10.org]
1268 * spin_lock_irqsave(host lock)
1271 * Zero on success, non-zero on error.
1273 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd
*qc
)
1275 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1276 struct ata_taskfile
*tf
= &qc
->tf
;
1277 const u8
*cdb
= scmd
->cmnd
;
1279 if (scmd
->cmd_len
< 5)
1282 tf
->flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1283 tf
->protocol
= ATA_PROT_NODATA
;
1285 ; /* ignore IMMED bit, violates sat-r05 */
1288 goto invalid_fld
; /* LOEJ bit set not supported */
1289 if (((cdb
[4] >> 4) & 0xf) != 0)
1290 goto invalid_fld
; /* power conditions not supported */
1293 tf
->nsect
= 1; /* 1 sector, lba=0 */
1295 if (qc
->dev
->flags
& ATA_DFLAG_LBA
) {
1296 tf
->flags
|= ATA_TFLAG_LBA
;
1301 tf
->device
|= ATA_LBA
;
1304 tf
->lbal
= 0x1; /* sect */
1305 tf
->lbam
= 0x0; /* cyl low */
1306 tf
->lbah
= 0x0; /* cyl high */
1309 tf
->command
= ATA_CMD_VERIFY
; /* READ VERIFY */
1311 /* XXX: This is for backward compatibility, will be
1312 * removed. Read Documentation/feature-removal-schedule.txt
1315 if ((qc
->dev
->flags
& ATA_DFLAG_SPUNDOWN
) &&
1316 (system_state
== SYSTEM_HALT
||
1317 system_state
== SYSTEM_POWER_OFF
)) {
1318 static unsigned long warned
;
1320 if (!test_and_set_bit(0, &warned
)) {
1321 ata_dev_printk(qc
->dev
, KERN_WARNING
,
1322 "DISK MIGHT NOT BE SPUN DOWN PROPERLY. "
1323 "UPDATE SHUTDOWN UTILITY\n");
1324 ata_dev_printk(qc
->dev
, KERN_WARNING
,
1325 "For more info, visit "
1326 "http://linux-ata.org/shutdown.html\n");
1328 /* ->scsi_done is not used, use it for
1329 * delayed completion.
1331 scmd
->scsi_done
= qc
->scsidone
;
1332 qc
->scsidone
= ata_delayed_done
;
1334 scmd
->result
= SAM_STAT_GOOD
;
1338 /* Issue ATA STANDBY IMMEDIATE command */
1339 tf
->command
= ATA_CMD_STANDBYNOW1
;
1343 * Standby and Idle condition timers could be implemented but that
1344 * would require libata to implement the Power condition mode page
1345 * and allow the user to change it. Changing mode pages requires
1346 * MODE SELECT to be implemented.
1352 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1353 /* "Invalid field in cbd" */
1359 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1360 * @qc: Storage for translated ATA taskfile
1362 * Sets up an ATA taskfile to issue FLUSH CACHE or
1366 * spin_lock_irqsave(host lock)
1369 * Zero on success, non-zero on error.
1371 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd
*qc
)
1373 struct ata_taskfile
*tf
= &qc
->tf
;
1375 tf
->flags
|= ATA_TFLAG_DEVICE
;
1376 tf
->protocol
= ATA_PROT_NODATA
;
1378 if (qc
->dev
->flags
& ATA_DFLAG_FLUSH_EXT
)
1379 tf
->command
= ATA_CMD_FLUSH_EXT
;
1381 tf
->command
= ATA_CMD_FLUSH
;
1383 /* flush is critical for IO integrity, consider it an IO command */
1384 qc
->flags
|= ATA_QCFLAG_IO
;
1390 * scsi_6_lba_len - Get LBA and transfer length
1391 * @cdb: SCSI command to translate
1393 * Calculate LBA and transfer length for 6-byte commands.
1397 * @plen: the transfer length
1399 static void scsi_6_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1404 VPRINTK("six-byte command\n");
1406 lba
|= ((u64
)(cdb
[1] & 0x1f)) << 16;
1407 lba
|= ((u64
)cdb
[2]) << 8;
1408 lba
|= ((u64
)cdb
[3]);
1417 * scsi_10_lba_len - Get LBA and transfer length
1418 * @cdb: SCSI command to translate
1420 * Calculate LBA and transfer length for 10-byte commands.
1424 * @plen: the transfer length
1426 static void scsi_10_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1431 VPRINTK("ten-byte command\n");
1433 lba
|= ((u64
)cdb
[2]) << 24;
1434 lba
|= ((u64
)cdb
[3]) << 16;
1435 lba
|= ((u64
)cdb
[4]) << 8;
1436 lba
|= ((u64
)cdb
[5]);
1438 len
|= ((u32
)cdb
[7]) << 8;
1439 len
|= ((u32
)cdb
[8]);
1446 * scsi_16_lba_len - Get LBA and transfer length
1447 * @cdb: SCSI command to translate
1449 * Calculate LBA and transfer length for 16-byte commands.
1453 * @plen: the transfer length
1455 static void scsi_16_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1460 VPRINTK("sixteen-byte command\n");
1462 lba
|= ((u64
)cdb
[2]) << 56;
1463 lba
|= ((u64
)cdb
[3]) << 48;
1464 lba
|= ((u64
)cdb
[4]) << 40;
1465 lba
|= ((u64
)cdb
[5]) << 32;
1466 lba
|= ((u64
)cdb
[6]) << 24;
1467 lba
|= ((u64
)cdb
[7]) << 16;
1468 lba
|= ((u64
)cdb
[8]) << 8;
1469 lba
|= ((u64
)cdb
[9]);
1471 len
|= ((u32
)cdb
[10]) << 24;
1472 len
|= ((u32
)cdb
[11]) << 16;
1473 len
|= ((u32
)cdb
[12]) << 8;
1474 len
|= ((u32
)cdb
[13]);
1481 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1482 * @qc: Storage for translated ATA taskfile
1484 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1487 * spin_lock_irqsave(host lock)
1490 * Zero on success, non-zero on error.
1492 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd
*qc
)
1494 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1495 struct ata_taskfile
*tf
= &qc
->tf
;
1496 struct ata_device
*dev
= qc
->dev
;
1497 u64 dev_sectors
= qc
->dev
->n_sectors
;
1498 const u8
*cdb
= scmd
->cmnd
;
1502 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1503 tf
->protocol
= ATA_PROT_NODATA
;
1505 if (cdb
[0] == VERIFY
) {
1506 if (scmd
->cmd_len
< 10)
1508 scsi_10_lba_len(cdb
, &block
, &n_block
);
1509 } else if (cdb
[0] == VERIFY_16
) {
1510 if (scmd
->cmd_len
< 16)
1512 scsi_16_lba_len(cdb
, &block
, &n_block
);
1518 if (block
>= dev_sectors
)
1520 if ((block
+ n_block
) > dev_sectors
)
1523 if (dev
->flags
& ATA_DFLAG_LBA
) {
1524 tf
->flags
|= ATA_TFLAG_LBA
;
1526 if (lba_28_ok(block
, n_block
)) {
1528 tf
->command
= ATA_CMD_VERIFY
;
1529 tf
->device
|= (block
>> 24) & 0xf;
1530 } else if (lba_48_ok(block
, n_block
)) {
1531 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
1535 tf
->flags
|= ATA_TFLAG_LBA48
;
1536 tf
->command
= ATA_CMD_VERIFY_EXT
;
1538 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
1540 tf
->hob_lbah
= (block
>> 40) & 0xff;
1541 tf
->hob_lbam
= (block
>> 32) & 0xff;
1542 tf
->hob_lbal
= (block
>> 24) & 0xff;
1544 /* request too large even for LBA48 */
1547 tf
->nsect
= n_block
& 0xff;
1549 tf
->lbah
= (block
>> 16) & 0xff;
1550 tf
->lbam
= (block
>> 8) & 0xff;
1551 tf
->lbal
= block
& 0xff;
1553 tf
->device
|= ATA_LBA
;
1556 u32 sect
, head
, cyl
, track
;
1558 if (!lba_28_ok(block
, n_block
))
1561 /* Convert LBA to CHS */
1562 track
= (u32
)block
/ dev
->sectors
;
1563 cyl
= track
/ dev
->heads
;
1564 head
= track
% dev
->heads
;
1565 sect
= (u32
)block
% dev
->sectors
+ 1;
1567 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1568 (u32
)block
, track
, cyl
, head
, sect
);
1570 /* Check whether the converted CHS can fit.
1574 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
1577 tf
->command
= ATA_CMD_VERIFY
;
1578 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
1581 tf
->lbah
= cyl
>> 8;
1588 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1589 /* "Invalid field in cbd" */
1593 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1594 /* "Logical Block Address out of range" */
1598 scmd
->result
= SAM_STAT_GOOD
;
1603 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1604 * @qc: Storage for translated ATA taskfile
1606 * Converts any of six SCSI read/write commands into the
1607 * ATA counterpart, including starting sector (LBA),
1608 * sector count, and taking into account the device's LBA48
1611 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1612 * %WRITE_16 are currently supported.
1615 * spin_lock_irqsave(host lock)
1618 * Zero on success, non-zero on error.
1620 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd
*qc
)
1622 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1623 const u8
*cdb
= scmd
->cmnd
;
1624 unsigned int tf_flags
= 0;
1629 if (cdb
[0] == WRITE_10
|| cdb
[0] == WRITE_6
|| cdb
[0] == WRITE_16
)
1630 tf_flags
|= ATA_TFLAG_WRITE
;
1632 /* Calculate the SCSI LBA, transfer length and FUA. */
1636 if (unlikely(scmd
->cmd_len
< 10))
1638 scsi_10_lba_len(cdb
, &block
, &n_block
);
1639 if (unlikely(cdb
[1] & (1 << 3)))
1640 tf_flags
|= ATA_TFLAG_FUA
;
1644 if (unlikely(scmd
->cmd_len
< 6))
1646 scsi_6_lba_len(cdb
, &block
, &n_block
);
1648 /* for 6-byte r/w commands, transfer length 0
1649 * means 256 blocks of data, not 0 block.
1656 if (unlikely(scmd
->cmd_len
< 16))
1658 scsi_16_lba_len(cdb
, &block
, &n_block
);
1659 if (unlikely(cdb
[1] & (1 << 3)))
1660 tf_flags
|= ATA_TFLAG_FUA
;
1663 DPRINTK("no-byte command\n");
1667 /* Check and compose ATA command */
1669 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1670 * length 0 means transfer 0 block of data.
1671 * However, for ATA R/W commands, sector count 0 means
1672 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1674 * WARNING: one or two older ATA drives treat 0 as 0...
1678 qc
->flags
|= ATA_QCFLAG_IO
;
1679 qc
->nbytes
= n_block
* ATA_SECT_SIZE
;
1681 rc
= ata_build_rw_tf(&qc
->tf
, qc
->dev
, block
, n_block
, tf_flags
,
1683 if (likely(rc
== 0))
1688 /* treat all other errors as -EINVAL, fall through */
1690 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1691 /* "Invalid field in cbd" */
1695 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1696 /* "Logical Block Address out of range" */
1700 scmd
->result
= SAM_STAT_GOOD
;
1704 static void ata_scsi_qc_complete(struct ata_queued_cmd
*qc
)
1706 struct ata_port
*ap
= qc
->ap
;
1707 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1708 u8
*cdb
= cmd
->cmnd
;
1709 int need_sense
= (qc
->err_mask
!= 0);
1711 /* For ATA pass thru (SAT) commands, generate a sense block if
1712 * user mandated it or if there's an error. Note that if we
1713 * generate because the user forced us to, a check condition
1714 * is generated and the ATA register values are returned
1715 * whether the command completed successfully or not. If there
1716 * was no error, SK, ASC and ASCQ will all be zero.
1718 if (((cdb
[0] == ATA_16
) || (cdb
[0] == ATA_12
)) &&
1719 ((cdb
[2] & 0x20) || need_sense
)) {
1720 ata_gen_passthru_sense(qc
);
1723 cmd
->result
= SAM_STAT_GOOD
;
1725 /* TODO: decide which descriptor format to use
1726 * for 48b LBA devices and call that here
1727 * instead of the fixed desc, which is only
1728 * good for smaller LBA (and maybe CHS?)
1731 ata_gen_ata_sense(qc
);
1735 /* XXX: track spindown state for spindown skipping and warning */
1736 if (unlikely(qc
->tf
.command
== ATA_CMD_STANDBY
||
1737 qc
->tf
.command
== ATA_CMD_STANDBYNOW1
))
1738 qc
->dev
->flags
|= ATA_DFLAG_SPUNDOWN
;
1739 else if (likely(system_state
!= SYSTEM_HALT
&&
1740 system_state
!= SYSTEM_POWER_OFF
))
1741 qc
->dev
->flags
&= ~ATA_DFLAG_SPUNDOWN
;
1743 if (need_sense
&& !ap
->ops
->error_handler
)
1744 ata_dump_status(ap
->print_id
, &qc
->result_tf
);
1752 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1753 * @dev: ATA device to which the command is addressed
1754 * @cmd: SCSI command to execute
1755 * @done: SCSI command completion function
1756 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1758 * Our ->queuecommand() function has decided that the SCSI
1759 * command issued can be directly translated into an ATA
1760 * command, rather than handled internally.
1762 * This function sets up an ata_queued_cmd structure for the
1763 * SCSI command, and sends that ata_queued_cmd to the hardware.
1765 * The xlat_func argument (actor) returns 0 if ready to execute
1766 * ATA command, else 1 to finish translation. If 1 is returned
1767 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1768 * to be set reflecting an error condition or clean (early)
1772 * spin_lock_irqsave(host lock)
1775 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1776 * needs to be deferred.
1778 static int ata_scsi_translate(struct ata_device
*dev
, struct scsi_cmnd
*cmd
,
1779 void (*done
)(struct scsi_cmnd
*),
1780 ata_xlat_func_t xlat_func
)
1782 struct ata_port
*ap
= dev
->link
->ap
;
1783 struct ata_queued_cmd
*qc
;
1788 qc
= ata_scsi_qc_new(dev
, cmd
, done
);
1792 /* data is present; dma-map it */
1793 if (cmd
->sc_data_direction
== DMA_FROM_DEVICE
||
1794 cmd
->sc_data_direction
== DMA_TO_DEVICE
) {
1795 if (unlikely(scsi_bufflen(cmd
) < 1)) {
1796 ata_dev_printk(dev
, KERN_WARNING
,
1797 "WARNING: zero len r/w req\n");
1801 ata_sg_init(qc
, scsi_sglist(cmd
), scsi_sg_count(cmd
));
1803 qc
->dma_dir
= cmd
->sc_data_direction
;
1806 qc
->complete_fn
= ata_scsi_qc_complete
;
1811 if (ap
->ops
->qc_defer
) {
1812 if ((rc
= ap
->ops
->qc_defer(qc
)))
1816 /* select device, send command to hardware */
1825 DPRINTK("EXIT - early finish (good or error)\n");
1830 cmd
->result
= (DID_ERROR
<< 16);
1833 DPRINTK("EXIT - internal\n");
1838 DPRINTK("EXIT - defer\n");
1839 if (rc
== ATA_DEFER_LINK
)
1840 return SCSI_MLQUEUE_DEVICE_BUSY
;
1842 return SCSI_MLQUEUE_HOST_BUSY
;
1846 * ata_scsi_rbuf_get - Map response buffer.
1847 * @cmd: SCSI command containing buffer to be mapped.
1848 * @flags: unsigned long variable to store irq enable status
1849 * @copy_in: copy in from user buffer
1851 * Prepare buffer for simulated SCSI commands.
1854 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
1857 * Pointer to response buffer.
1859 static void *ata_scsi_rbuf_get(struct scsi_cmnd
*cmd
, bool copy_in
,
1860 unsigned long *flags
)
1862 spin_lock_irqsave(&ata_scsi_rbuf_lock
, *flags
);
1864 memset(ata_scsi_rbuf
, 0, ATA_SCSI_RBUF_SIZE
);
1866 sg_copy_to_buffer(scsi_sglist(cmd
), scsi_sg_count(cmd
),
1867 ata_scsi_rbuf
, ATA_SCSI_RBUF_SIZE
);
1868 return ata_scsi_rbuf
;
1872 * ata_scsi_rbuf_put - Unmap response buffer.
1873 * @cmd: SCSI command containing buffer to be unmapped.
1874 * @copy_out: copy out result
1875 * @flags: @flags passed to ata_scsi_rbuf_get()
1877 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1878 * @copy_back is true.
1881 * Unlocks ata_scsi_rbuf_lock.
1883 static inline void ata_scsi_rbuf_put(struct scsi_cmnd
*cmd
, bool copy_out
,
1884 unsigned long *flags
)
1887 sg_copy_from_buffer(scsi_sglist(cmd
), scsi_sg_count(cmd
),
1888 ata_scsi_rbuf
, ATA_SCSI_RBUF_SIZE
);
1889 spin_unlock_irqrestore(&ata_scsi_rbuf_lock
, *flags
);
1893 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1894 * @args: device IDENTIFY data / SCSI command of interest.
1895 * @actor: Callback hook for desired SCSI command simulator
1897 * Takes care of the hard work of simulating a SCSI command...
1898 * Mapping the response buffer, calling the command's handler,
1899 * and handling the handler's return value. This return value
1900 * indicates whether the handler wishes the SCSI command to be
1901 * completed successfully (0), or not (in which case cmd->result
1902 * and sense buffer are assumed to be set).
1905 * spin_lock_irqsave(host lock)
1907 static void ata_scsi_rbuf_fill(struct ata_scsi_args
*args
,
1908 unsigned int (*actor
)(struct ata_scsi_args
*args
, u8
*rbuf
))
1912 struct scsi_cmnd
*cmd
= args
->cmd
;
1913 unsigned long flags
;
1915 rbuf
= ata_scsi_rbuf_get(cmd
, false, &flags
);
1916 rc
= actor(args
, rbuf
);
1917 ata_scsi_rbuf_put(cmd
, rc
== 0, &flags
);
1920 cmd
->result
= SAM_STAT_GOOD
;
1925 * ata_scsiop_inq_std - Simulate INQUIRY command
1926 * @args: device IDENTIFY data / SCSI command of interest.
1927 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1929 * Returns standard device identification data associated
1930 * with non-VPD INQUIRY command output.
1933 * spin_lock_irqsave(host lock)
1935 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args
*args
, u8
*rbuf
)
1937 const u8 versions
[] = {
1938 0x60, /* SAM-3 (no version claimed) */
1941 0x20, /* SBC-2 (no version claimed) */
1944 0x60 /* SPC-3 (no version claimed) */
1949 0x5, /* claim SPC-3 version compatibility */
1956 /* set scsi removeable (RMB) bit per ata bit */
1957 if (ata_id_removeable(args
->id
))
1960 memcpy(rbuf
, hdr
, sizeof(hdr
));
1962 /* if ncq, set tags supported */
1963 if (ata_id_has_ncq(args
->id
))
1964 rbuf
[7] |= (1 << 1);
1966 memcpy(&rbuf
[8], "ATA ", 8);
1967 ata_id_string(args
->id
, &rbuf
[16], ATA_ID_PROD
, 16);
1968 ata_id_string(args
->id
, &rbuf
[32], ATA_ID_FW_REV
, 4);
1970 if (rbuf
[32] == 0 || rbuf
[32] == ' ')
1971 memcpy(&rbuf
[32], "n/a ", 4);
1973 memcpy(rbuf
+ 59, versions
, sizeof(versions
));
1979 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1980 * @args: device IDENTIFY data / SCSI command of interest.
1981 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1983 * Returns list of inquiry VPD pages available.
1986 * spin_lock_irqsave(host lock)
1988 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args
*args
, u8
*rbuf
)
1990 const u8 pages
[] = {
1991 0x00, /* page 0x00, this page */
1992 0x80, /* page 0x80, unit serial no page */
1993 0x83, /* page 0x83, device ident page */
1994 0x89, /* page 0x89, ata info page */
1995 0xb1, /* page 0xb1, block device characteristics page */
1998 rbuf
[3] = sizeof(pages
); /* number of supported VPD pages */
1999 memcpy(rbuf
+ 4, pages
, sizeof(pages
));
2004 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
2005 * @args: device IDENTIFY data / SCSI command of interest.
2006 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2008 * Returns ATA device serial number.
2011 * spin_lock_irqsave(host lock)
2013 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args
*args
, u8
*rbuf
)
2017 0x80, /* this page code */
2019 ATA_ID_SERNO_LEN
, /* page len */
2022 memcpy(rbuf
, hdr
, sizeof(hdr
));
2023 ata_id_string(args
->id
, (unsigned char *) &rbuf
[4],
2024 ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
2029 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
2030 * @args: device IDENTIFY data / SCSI command of interest.
2031 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2033 * Yields two logical unit device identification designators:
2034 * - vendor specific ASCII containing the ATA serial number
2035 * - SAT defined "t10 vendor id based" containing ASCII vendor
2036 * name ("ATA "), model and serial numbers.
2039 * spin_lock_irqsave(host lock)
2041 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args
*args
, u8
*rbuf
)
2043 const int sat_model_serial_desc_len
= 68;
2046 rbuf
[1] = 0x83; /* this page code */
2049 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2051 rbuf
[num
+ 3] = ATA_ID_SERNO_LEN
;
2053 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
,
2054 ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
2055 num
+= ATA_ID_SERNO_LEN
;
2057 /* SAT defined lu model and serial numbers descriptor */
2058 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2061 rbuf
[num
+ 3] = sat_model_serial_desc_len
;
2063 memcpy(rbuf
+ num
, "ATA ", 8);
2065 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
, ATA_ID_PROD
,
2067 num
+= ATA_ID_PROD_LEN
;
2068 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
, ATA_ID_SERNO
,
2070 num
+= ATA_ID_SERNO_LEN
;
2072 rbuf
[3] = num
- 4; /* page len (assume less than 256 bytes) */
2077 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2078 * @args: device IDENTIFY data / SCSI command of interest.
2079 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2081 * Yields SAT-specified ATA VPD page.
2084 * spin_lock_irqsave(host lock)
2086 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args
*args
, u8
*rbuf
)
2088 struct ata_taskfile tf
;
2090 memset(&tf
, 0, sizeof(tf
));
2092 rbuf
[1] = 0x89; /* our page code */
2093 rbuf
[2] = (0x238 >> 8); /* page size fixed at 238h */
2094 rbuf
[3] = (0x238 & 0xff);
2096 memcpy(&rbuf
[8], "linux ", 8);
2097 memcpy(&rbuf
[16], "libata ", 16);
2098 memcpy(&rbuf
[32], DRV_VERSION
, 4);
2099 ata_id_string(args
->id
, &rbuf
[32], ATA_ID_FW_REV
, 4);
2101 /* we don't store the ATA device signature, so we fake it */
2103 tf
.command
= ATA_DRDY
; /* really, this is Status reg */
2107 ata_tf_to_fis(&tf
, 0, 1, &rbuf
[36]); /* TODO: PMP? */
2108 rbuf
[36] = 0x34; /* force D2H Reg FIS (34h) */
2110 rbuf
[56] = ATA_CMD_ID_ATA
;
2112 memcpy(&rbuf
[60], &args
->id
[0], 512);
2116 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args
*args
, u8
*rbuf
)
2120 if (ata_id_major_version(args
->id
) > 7) {
2121 rbuf
[4] = args
->id
[217] >> 8;
2122 rbuf
[5] = args
->id
[217];
2123 rbuf
[7] = args
->id
[168] & 0xf;
2130 * ata_scsiop_noop - Command handler that simply returns success.
2131 * @args: device IDENTIFY data / SCSI command of interest.
2132 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2134 * No operation. Simply returns success to caller, to indicate
2135 * that the caller should successfully complete this SCSI command.
2138 * spin_lock_irqsave(host lock)
2140 static unsigned int ata_scsiop_noop(struct ata_scsi_args
*args
, u8
*rbuf
)
2147 * ata_msense_caching - Simulate MODE SENSE caching info page
2148 * @id: device IDENTIFY data
2149 * @buf: output buffer
2151 * Generate a caching info page, which conditionally indicates
2152 * write caching to the SCSI layer, depending on device
2158 static unsigned int ata_msense_caching(u16
*id
, u8
*buf
)
2160 memcpy(buf
, def_cache_mpage
, sizeof(def_cache_mpage
));
2161 if (ata_id_wcache_enabled(id
))
2162 buf
[2] |= (1 << 2); /* write cache enable */
2163 if (!ata_id_rahead_enabled(id
))
2164 buf
[12] |= (1 << 5); /* disable read ahead */
2165 return sizeof(def_cache_mpage
);
2169 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
2170 * @buf: output buffer
2172 * Generate a generic MODE SENSE control mode page.
2177 static unsigned int ata_msense_ctl_mode(u8
*buf
)
2179 memcpy(buf
, def_control_mpage
, sizeof(def_control_mpage
));
2180 return sizeof(def_control_mpage
);
2184 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2185 * @buf: output buffer
2187 * Generate a generic MODE SENSE r/w error recovery page.
2192 static unsigned int ata_msense_rw_recovery(u8
*buf
)
2194 memcpy(buf
, def_rw_recovery_mpage
, sizeof(def_rw_recovery_mpage
));
2195 return sizeof(def_rw_recovery_mpage
);
2199 * We can turn this into a real blacklist if it's needed, for now just
2200 * blacklist any Maxtor BANC1G10 revision firmware
2202 static int ata_dev_supports_fua(u16
*id
)
2204 unsigned char model
[ATA_ID_PROD_LEN
+ 1], fw
[ATA_ID_FW_REV_LEN
+ 1];
2208 if (!ata_id_has_fua(id
))
2211 ata_id_c_string(id
, model
, ATA_ID_PROD
, sizeof(model
));
2212 ata_id_c_string(id
, fw
, ATA_ID_FW_REV
, sizeof(fw
));
2214 if (strcmp(model
, "Maxtor"))
2216 if (strcmp(fw
, "BANC1G10"))
2219 return 0; /* blacklisted */
2223 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2224 * @args: device IDENTIFY data / SCSI command of interest.
2225 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2227 * Simulate MODE SENSE commands. Assume this is invoked for direct
2228 * access devices (e.g. disks) only. There should be no block
2229 * descriptor for other device types.
2232 * spin_lock_irqsave(host lock)
2234 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args
*args
, u8
*rbuf
)
2236 struct ata_device
*dev
= args
->dev
;
2237 u8
*scsicmd
= args
->cmd
->cmnd
, *p
= rbuf
;
2238 const u8 sat_blk_desc
[] = {
2239 0, 0, 0, 0, /* number of blocks: sat unspecified */
2241 0, 0x2, 0x0 /* block length: 512 bytes */
2244 unsigned int ebd
, page_control
, six_byte
;
2249 six_byte
= (scsicmd
[0] == MODE_SENSE
);
2250 ebd
= !(scsicmd
[1] & 0x8); /* dbd bit inverted == edb */
2252 * LLBA bit in msense(10) ignored (compliant)
2255 page_control
= scsicmd
[2] >> 6;
2256 switch (page_control
) {
2257 case 0: /* current */
2258 break; /* supported */
2260 goto saving_not_supp
;
2261 case 1: /* changeable */
2262 case 2: /* defaults */
2268 p
+= 4 + (ebd
? 8 : 0);
2270 p
+= 8 + (ebd
? 8 : 0);
2272 pg
= scsicmd
[2] & 0x3f;
2275 * No mode subpages supported (yet) but asking for _all_
2276 * subpages may be valid
2278 if (spg
&& (spg
!= ALL_SUB_MPAGES
))
2282 case RW_RECOVERY_MPAGE
:
2283 p
+= ata_msense_rw_recovery(p
);
2287 p
+= ata_msense_caching(args
->id
, p
);
2291 p
+= ata_msense_ctl_mode(p
);
2295 p
+= ata_msense_rw_recovery(p
);
2296 p
+= ata_msense_caching(args
->id
, p
);
2297 p
+= ata_msense_ctl_mode(p
);
2300 default: /* invalid page code */
2305 if (ata_dev_supports_fua(args
->id
) && (dev
->flags
& ATA_DFLAG_LBA48
) &&
2306 (!(dev
->flags
& ATA_DFLAG_PIO
) || dev
->multi_count
))
2310 rbuf
[0] = p
- rbuf
- 1;
2313 rbuf
[3] = sizeof(sat_blk_desc
);
2314 memcpy(rbuf
+ 4, sat_blk_desc
, sizeof(sat_blk_desc
));
2317 unsigned int output_len
= p
- rbuf
- 2;
2319 rbuf
[0] = output_len
>> 8;
2320 rbuf
[1] = output_len
;
2323 rbuf
[7] = sizeof(sat_blk_desc
);
2324 memcpy(rbuf
+ 8, sat_blk_desc
, sizeof(sat_blk_desc
));
2330 ata_scsi_set_sense(args
->cmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
2331 /* "Invalid field in cbd" */
2335 ata_scsi_set_sense(args
->cmd
, ILLEGAL_REQUEST
, 0x39, 0x0);
2336 /* "Saving parameters not supported" */
2341 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2342 * @args: device IDENTIFY data / SCSI command of interest.
2343 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2345 * Simulate READ CAPACITY commands.
2350 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args
*args
, u8
*rbuf
)
2352 u64 last_lba
= args
->dev
->n_sectors
- 1; /* LBA of the last block */
2356 if (args
->cmd
->cmnd
[0] == READ_CAPACITY
) {
2357 if (last_lba
>= 0xffffffffULL
)
2358 last_lba
= 0xffffffff;
2360 /* sector count, 32-bit */
2361 rbuf
[0] = last_lba
>> (8 * 3);
2362 rbuf
[1] = last_lba
>> (8 * 2);
2363 rbuf
[2] = last_lba
>> (8 * 1);
2367 rbuf
[6] = ATA_SECT_SIZE
>> 8;
2368 rbuf
[7] = ATA_SECT_SIZE
& 0xff;
2370 /* sector count, 64-bit */
2371 rbuf
[0] = last_lba
>> (8 * 7);
2372 rbuf
[1] = last_lba
>> (8 * 6);
2373 rbuf
[2] = last_lba
>> (8 * 5);
2374 rbuf
[3] = last_lba
>> (8 * 4);
2375 rbuf
[4] = last_lba
>> (8 * 3);
2376 rbuf
[5] = last_lba
>> (8 * 2);
2377 rbuf
[6] = last_lba
>> (8 * 1);
2381 rbuf
[10] = ATA_SECT_SIZE
>> 8;
2382 rbuf
[11] = ATA_SECT_SIZE
& 0xff;
2389 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2390 * @args: device IDENTIFY data / SCSI command of interest.
2391 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2393 * Simulate REPORT LUNS command.
2396 * spin_lock_irqsave(host lock)
2398 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args
*args
, u8
*rbuf
)
2401 rbuf
[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2406 static void atapi_sense_complete(struct ata_queued_cmd
*qc
)
2408 if (qc
->err_mask
&& ((qc
->err_mask
& AC_ERR_DEV
) == 0)) {
2409 /* FIXME: not quite right; we don't want the
2410 * translation of taskfile registers into
2411 * a sense descriptors, since that's only
2412 * correct for ATA, not ATAPI
2414 ata_gen_passthru_sense(qc
);
2417 qc
->scsidone(qc
->scsicmd
);
2421 /* is it pointless to prefer PIO for "safety reasons"? */
2422 static inline int ata_pio_use_silly(struct ata_port
*ap
)
2424 return (ap
->flags
& ATA_FLAG_PIO_DMA
);
2427 static void atapi_request_sense(struct ata_queued_cmd
*qc
)
2429 struct ata_port
*ap
= qc
->ap
;
2430 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2432 DPRINTK("ATAPI request sense\n");
2434 /* FIXME: is this needed? */
2435 memset(cmd
->sense_buffer
, 0, SCSI_SENSE_BUFFERSIZE
);
2437 #ifdef CONFIG_ATA_SFF
2438 if (ap
->ops
->sff_tf_read
)
2439 ap
->ops
->sff_tf_read(ap
, &qc
->tf
);
2442 /* fill these in, for the case where they are -not- overwritten */
2443 cmd
->sense_buffer
[0] = 0x70;
2444 cmd
->sense_buffer
[2] = qc
->tf
.feature
>> 4;
2448 /* setup sg table and init transfer direction */
2449 sg_init_one(&qc
->sgent
, cmd
->sense_buffer
, SCSI_SENSE_BUFFERSIZE
);
2450 ata_sg_init(qc
, &qc
->sgent
, 1);
2451 qc
->dma_dir
= DMA_FROM_DEVICE
;
2453 memset(&qc
->cdb
, 0, qc
->dev
->cdb_len
);
2454 qc
->cdb
[0] = REQUEST_SENSE
;
2455 qc
->cdb
[4] = SCSI_SENSE_BUFFERSIZE
;
2457 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2458 qc
->tf
.command
= ATA_CMD_PACKET
;
2460 if (ata_pio_use_silly(ap
)) {
2461 qc
->tf
.protocol
= ATAPI_PROT_DMA
;
2462 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
2464 qc
->tf
.protocol
= ATAPI_PROT_PIO
;
2465 qc
->tf
.lbam
= SCSI_SENSE_BUFFERSIZE
;
2468 qc
->nbytes
= SCSI_SENSE_BUFFERSIZE
;
2470 qc
->complete_fn
= atapi_sense_complete
;
2477 static void atapi_qc_complete(struct ata_queued_cmd
*qc
)
2479 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2480 unsigned int err_mask
= qc
->err_mask
;
2482 VPRINTK("ENTER, err_mask 0x%X\n", err_mask
);
2484 /* handle completion from new EH */
2485 if (unlikely(qc
->ap
->ops
->error_handler
&&
2486 (err_mask
|| qc
->flags
& ATA_QCFLAG_SENSE_VALID
))) {
2488 if (!(qc
->flags
& ATA_QCFLAG_SENSE_VALID
)) {
2489 /* FIXME: not quite right; we don't want the
2490 * translation of taskfile registers into a
2491 * sense descriptors, since that's only
2492 * correct for ATA, not ATAPI
2494 ata_gen_passthru_sense(qc
);
2497 /* SCSI EH automatically locks door if sdev->locked is
2498 * set. Sometimes door lock request continues to
2499 * fail, for example, when no media is present. This
2500 * creates a loop - SCSI EH issues door lock which
2501 * fails and gets invoked again to acquire sense data
2502 * for the failed command.
2504 * If door lock fails, always clear sdev->locked to
2505 * avoid this infinite loop.
2507 if (qc
->cdb
[0] == ALLOW_MEDIUM_REMOVAL
)
2508 qc
->dev
->sdev
->locked
= 0;
2510 qc
->scsicmd
->result
= SAM_STAT_CHECK_CONDITION
;
2516 /* successful completion or old EH failure path */
2517 if (unlikely(err_mask
& AC_ERR_DEV
)) {
2518 cmd
->result
= SAM_STAT_CHECK_CONDITION
;
2519 atapi_request_sense(qc
);
2521 } else if (unlikely(err_mask
)) {
2522 /* FIXME: not quite right; we don't want the
2523 * translation of taskfile registers into
2524 * a sense descriptors, since that's only
2525 * correct for ATA, not ATAPI
2527 ata_gen_passthru_sense(qc
);
2529 u8
*scsicmd
= cmd
->cmnd
;
2531 if ((scsicmd
[0] == INQUIRY
) && ((scsicmd
[1] & 0x03) == 0)) {
2532 unsigned long flags
;
2535 buf
= ata_scsi_rbuf_get(cmd
, true, &flags
);
2537 /* ATAPI devices typically report zero for their SCSI version,
2538 * and sometimes deviate from the spec WRT response data
2539 * format. If SCSI version is reported as zero like normal,
2540 * then we make the following fixups: 1) Fake MMC-5 version,
2541 * to indicate to the Linux scsi midlayer this is a modern
2542 * device. 2) Ensure response data format / ATAPI information
2543 * are always correct.
2550 ata_scsi_rbuf_put(cmd
, true, &flags
);
2553 cmd
->result
= SAM_STAT_GOOD
;
2560 * atapi_xlat - Initialize PACKET taskfile
2561 * @qc: command structure to be initialized
2564 * spin_lock_irqsave(host lock)
2567 * Zero on success, non-zero on failure.
2569 static unsigned int atapi_xlat(struct ata_queued_cmd
*qc
)
2571 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
2572 struct ata_device
*dev
= qc
->dev
;
2573 int nodata
= (scmd
->sc_data_direction
== DMA_NONE
);
2574 int using_pio
= !nodata
&& (dev
->flags
& ATA_DFLAG_PIO
);
2575 unsigned int nbytes
;
2577 memset(qc
->cdb
, 0, dev
->cdb_len
);
2578 memcpy(qc
->cdb
, scmd
->cmnd
, scmd
->cmd_len
);
2580 qc
->complete_fn
= atapi_qc_complete
;
2582 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2583 if (scmd
->sc_data_direction
== DMA_TO_DEVICE
) {
2584 qc
->tf
.flags
|= ATA_TFLAG_WRITE
;
2585 DPRINTK("direction: write\n");
2588 qc
->tf
.command
= ATA_CMD_PACKET
;
2589 ata_qc_set_pc_nbytes(qc
);
2591 /* check whether ATAPI DMA is safe */
2592 if (!nodata
&& !using_pio
&& atapi_check_dma(qc
))
2595 /* Some controller variants snoop this value for Packet
2596 * transfers to do state machine and FIFO management. Thus we
2597 * want to set it properly, and for DMA where it is
2598 * effectively meaningless.
2600 nbytes
= min(ata_qc_raw_nbytes(qc
), (unsigned int)63 * 1024);
2602 /* Most ATAPI devices which honor transfer chunk size don't
2603 * behave according to the spec when odd chunk size which
2604 * matches the transfer length is specified. If the number of
2605 * bytes to transfer is 2n+1. According to the spec, what
2606 * should happen is to indicate that 2n+1 is going to be
2607 * transferred and transfer 2n+2 bytes where the last byte is
2610 * In practice, this doesn't happen. ATAPI devices first
2611 * indicate and transfer 2n bytes and then indicate and
2612 * transfer 2 bytes where the last byte is padding.
2614 * This inconsistency confuses several controllers which
2615 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2616 * These controllers use actual number of transferred bytes to
2617 * update DMA poitner and transfer of 4n+2 bytes make those
2618 * controller push DMA pointer by 4n+4 bytes because SATA data
2619 * FISes are aligned to 4 bytes. This causes data corruption
2620 * and buffer overrun.
2622 * Always setting nbytes to even number solves this problem
2623 * because then ATAPI devices don't have to split data at 2n
2629 qc
->tf
.lbam
= (nbytes
& 0xFF);
2630 qc
->tf
.lbah
= (nbytes
>> 8);
2633 qc
->tf
.protocol
= ATAPI_PROT_NODATA
;
2635 qc
->tf
.protocol
= ATAPI_PROT_PIO
;
2638 qc
->tf
.protocol
= ATAPI_PROT_DMA
;
2639 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
2641 if ((dev
->flags
& ATA_DFLAG_DMADIR
) &&
2642 (scmd
->sc_data_direction
!= DMA_TO_DEVICE
))
2643 /* some SATA bridges need us to indicate data xfer direction */
2644 qc
->tf
.feature
|= ATAPI_DMADIR
;
2648 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2649 as ATAPI tape drives don't get this right otherwise */
2653 static struct ata_device
*ata_find_dev(struct ata_port
*ap
, int devno
)
2655 if (!sata_pmp_attached(ap
)) {
2656 if (likely(devno
< ata_link_max_devices(&ap
->link
)))
2657 return &ap
->link
.device
[devno
];
2659 if (likely(devno
< ap
->nr_pmp_links
))
2660 return &ap
->pmp_link
[devno
].device
[0];
2666 static struct ata_device
*__ata_scsi_find_dev(struct ata_port
*ap
,
2667 const struct scsi_device
*scsidev
)
2671 /* skip commands not addressed to targets we simulate */
2672 if (!sata_pmp_attached(ap
)) {
2673 if (unlikely(scsidev
->channel
|| scsidev
->lun
))
2675 devno
= scsidev
->id
;
2677 if (unlikely(scsidev
->id
|| scsidev
->lun
))
2679 devno
= scsidev
->channel
;
2682 return ata_find_dev(ap
, devno
);
2686 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2687 * @ap: ATA port to which the device is attached
2688 * @scsidev: SCSI device from which we derive the ATA device
2690 * Given various information provided in struct scsi_cmnd,
2691 * map that onto an ATA bus, and using that mapping
2692 * determine which ata_device is associated with the
2693 * SCSI command to be sent.
2696 * spin_lock_irqsave(host lock)
2699 * Associated ATA device, or %NULL if not found.
2701 static struct ata_device
*
2702 ata_scsi_find_dev(struct ata_port
*ap
, const struct scsi_device
*scsidev
)
2704 struct ata_device
*dev
= __ata_scsi_find_dev(ap
, scsidev
);
2706 if (unlikely(!dev
|| !ata_dev_enabled(dev
)))
2713 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2714 * @byte1: Byte 1 from pass-thru CDB.
2717 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2720 ata_scsi_map_proto(u8 byte1
)
2722 switch((byte1
& 0x1e) >> 1) {
2723 case 3: /* Non-data */
2724 return ATA_PROT_NODATA
;
2727 case 10: /* UDMA Data-in */
2728 case 11: /* UDMA Data-Out */
2729 return ATA_PROT_DMA
;
2731 case 4: /* PIO Data-in */
2732 case 5: /* PIO Data-out */
2733 return ATA_PROT_PIO
;
2735 case 0: /* Hard Reset */
2737 case 8: /* Device Diagnostic */
2738 case 9: /* Device Reset */
2739 case 7: /* DMA Queued */
2740 case 12: /* FPDMA */
2741 case 15: /* Return Response Info */
2742 default: /* Reserved */
2746 return ATA_PROT_UNKNOWN
;
2750 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2751 * @qc: command structure to be initialized
2753 * Handles either 12 or 16-byte versions of the CDB.
2756 * Zero on success, non-zero on failure.
2758 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd
*qc
)
2760 struct ata_taskfile
*tf
= &(qc
->tf
);
2761 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
2762 struct ata_device
*dev
= qc
->dev
;
2763 const u8
*cdb
= scmd
->cmnd
;
2765 if ((tf
->protocol
= ata_scsi_map_proto(cdb
[1])) == ATA_PROT_UNKNOWN
)
2769 * Filter TPM commands by default. These provide an
2770 * essentially uncontrolled encrypted "back door" between
2771 * applications and the disk. Set libata.allow_tpm=1 if you
2772 * have a real reason for wanting to use them. This ensures
2773 * that installed software cannot easily mess stuff up without
2774 * user intent. DVR type users will probably ship with this enabled
2775 * for movie content management.
2777 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
2778 * for this and should do in future but that it is not sufficient as
2779 * DCS is an optional feature set. Thus we also do the software filter
2780 * so that we comply with the TC consortium stated goal that the user
2781 * can turn off TC features of their system.
2783 if (tf
->command
>= 0x5C && tf
->command
<= 0x5F && !libata_allow_tpm
)
2786 /* We may not issue DMA commands if no DMA mode is set */
2787 if (tf
->protocol
== ATA_PROT_DMA
&& dev
->dma_mode
== 0)
2791 * 12 and 16 byte CDBs use different offsets to
2792 * provide the various register values.
2794 if (cdb
[0] == ATA_16
) {
2796 * 16-byte CDB - may contain extended commands.
2798 * If that is the case, copy the upper byte register values.
2800 if (cdb
[1] & 0x01) {
2801 tf
->hob_feature
= cdb
[3];
2802 tf
->hob_nsect
= cdb
[5];
2803 tf
->hob_lbal
= cdb
[7];
2804 tf
->hob_lbam
= cdb
[9];
2805 tf
->hob_lbah
= cdb
[11];
2806 tf
->flags
|= ATA_TFLAG_LBA48
;
2808 tf
->flags
&= ~ATA_TFLAG_LBA48
;
2811 * Always copy low byte, device and command registers.
2813 tf
->feature
= cdb
[4];
2818 tf
->device
= cdb
[13];
2819 tf
->command
= cdb
[14];
2822 * 12-byte CDB - incapable of extended commands.
2824 tf
->flags
&= ~ATA_TFLAG_LBA48
;
2826 tf
->feature
= cdb
[3];
2831 tf
->device
= cdb
[8];
2832 tf
->command
= cdb
[9];
2835 /* enforce correct master/slave bit */
2836 tf
->device
= dev
->devno
?
2837 tf
->device
| ATA_DEV1
: tf
->device
& ~ATA_DEV1
;
2839 /* sanity check for pio multi commands */
2840 if ((cdb
[1] & 0xe0) && !is_multi_taskfile(tf
))
2843 if (is_multi_taskfile(tf
)) {
2844 unsigned int multi_count
= 1 << (cdb
[1] >> 5);
2846 /* compare the passed through multi_count
2847 * with the cached multi_count of libata
2849 if (multi_count
!= dev
->multi_count
)
2850 ata_dev_printk(dev
, KERN_WARNING
,
2851 "invalid multi_count %u ignored\n",
2855 /* READ/WRITE LONG use a non-standard sect_size */
2856 qc
->sect_size
= ATA_SECT_SIZE
;
2857 switch (tf
->command
) {
2858 case ATA_CMD_READ_LONG
:
2859 case ATA_CMD_READ_LONG_ONCE
:
2860 case ATA_CMD_WRITE_LONG
:
2861 case ATA_CMD_WRITE_LONG_ONCE
:
2862 if (tf
->protocol
!= ATA_PROT_PIO
|| tf
->nsect
!= 1)
2864 qc
->sect_size
= scsi_bufflen(scmd
);
2868 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2869 * SET_FEATURES - XFER MODE must be preceded/succeeded
2870 * by an update to hardware-specific registers for each
2871 * controller (i.e. the reason for ->set_piomode(),
2872 * ->set_dmamode(), and ->post_set_mode() hooks).
2874 if ((tf
->command
== ATA_CMD_SET_FEATURES
)
2875 && (tf
->feature
== SETFEATURES_XFER
))
2879 * Set flags so that all registers will be written,
2880 * and pass on write indication (used for PIO/DMA
2883 tf
->flags
|= (ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
);
2885 if (scmd
->sc_data_direction
== DMA_TO_DEVICE
)
2886 tf
->flags
|= ATA_TFLAG_WRITE
;
2889 * Set transfer length.
2891 * TODO: find out if we need to do more here to
2892 * cover scatter/gather case.
2894 ata_qc_set_pc_nbytes(qc
);
2896 /* request result TF and be quiet about device error */
2897 qc
->flags
|= ATA_QCFLAG_RESULT_TF
| ATA_QCFLAG_QUIET
;
2902 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x00);
2903 /* "Invalid field in cdb" */
2908 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2910 * @cmd: SCSI command opcode to consider
2912 * Look up the SCSI command given, and determine whether the
2913 * SCSI command is to be translated or simulated.
2916 * Pointer to translation function if possible, %NULL if not.
2919 static inline ata_xlat_func_t
ata_get_xlat_func(struct ata_device
*dev
, u8 cmd
)
2929 return ata_scsi_rw_xlat
;
2931 case SYNCHRONIZE_CACHE
:
2932 if (ata_try_flush_cache(dev
))
2933 return ata_scsi_flush_xlat
;
2938 return ata_scsi_verify_xlat
;
2942 return ata_scsi_pass_thru
;
2945 return ata_scsi_start_stop_xlat
;
2952 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2953 * @ap: ATA port to which the command was being sent
2954 * @cmd: SCSI command to dump
2956 * Prints the contents of a SCSI command via printk().
2959 static inline void ata_scsi_dump_cdb(struct ata_port
*ap
,
2960 struct scsi_cmnd
*cmd
)
2963 struct scsi_device
*scsidev
= cmd
->device
;
2964 u8
*scsicmd
= cmd
->cmnd
;
2966 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
2968 scsidev
->channel
, scsidev
->id
, scsidev
->lun
,
2969 scsicmd
[0], scsicmd
[1], scsicmd
[2], scsicmd
[3],
2970 scsicmd
[4], scsicmd
[5], scsicmd
[6], scsicmd
[7],
2975 static inline int __ata_scsi_queuecmd(struct scsi_cmnd
*scmd
,
2976 void (*done
)(struct scsi_cmnd
*),
2977 struct ata_device
*dev
)
2979 u8 scsi_op
= scmd
->cmnd
[0];
2980 ata_xlat_func_t xlat_func
;
2983 if (dev
->class == ATA_DEV_ATA
) {
2984 if (unlikely(!scmd
->cmd_len
|| scmd
->cmd_len
> dev
->cdb_len
))
2987 xlat_func
= ata_get_xlat_func(dev
, scsi_op
);
2989 if (unlikely(!scmd
->cmd_len
))
2993 if (likely((scsi_op
!= ATA_16
) || !atapi_passthru16
)) {
2994 /* relay SCSI command to ATAPI device */
2995 int len
= COMMAND_SIZE(scsi_op
);
2996 if (unlikely(len
> scmd
->cmd_len
|| len
> dev
->cdb_len
))
2999 xlat_func
= atapi_xlat
;
3001 /* ATA_16 passthru, treat as an ATA command */
3002 if (unlikely(scmd
->cmd_len
> 16))
3005 xlat_func
= ata_get_xlat_func(dev
, scsi_op
);
3010 rc
= ata_scsi_translate(dev
, scmd
, done
, xlat_func
);
3012 ata_scsi_simulate(dev
, scmd
, done
);
3017 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
3018 scmd
->cmd_len
, scsi_op
, dev
->cdb_len
);
3019 scmd
->result
= DID_ERROR
<< 16;
3025 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
3026 * @cmd: SCSI command to be sent
3027 * @done: Completion function, called when command is complete
3029 * In some cases, this function translates SCSI commands into
3030 * ATA taskfiles, and queues the taskfiles to be sent to
3031 * hardware. In other cases, this function simulates a
3032 * SCSI device by evaluating and responding to certain
3033 * SCSI commands. This creates the overall effect of
3034 * ATA and ATAPI devices appearing as SCSI devices.
3037 * Releases scsi-layer-held lock, and obtains host lock.
3040 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3043 int ata_scsi_queuecmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*))
3045 struct ata_port
*ap
;
3046 struct ata_device
*dev
;
3047 struct scsi_device
*scsidev
= cmd
->device
;
3048 struct Scsi_Host
*shost
= scsidev
->host
;
3051 ap
= ata_shost_to_port(shost
);
3053 spin_unlock(shost
->host_lock
);
3054 spin_lock(ap
->lock
);
3056 ata_scsi_dump_cdb(ap
, cmd
);
3058 dev
= ata_scsi_find_dev(ap
, scsidev
);
3060 rc
= __ata_scsi_queuecmd(cmd
, done
, dev
);
3062 cmd
->result
= (DID_BAD_TARGET
<< 16);
3066 spin_unlock(ap
->lock
);
3067 spin_lock(shost
->host_lock
);
3072 * ata_scsi_simulate - simulate SCSI command on ATA device
3073 * @dev: the target device
3074 * @cmd: SCSI command being sent to device.
3075 * @done: SCSI command completion function.
3077 * Interprets and directly executes a select list of SCSI commands
3078 * that can be handled internally.
3081 * spin_lock_irqsave(host lock)
3084 void ata_scsi_simulate(struct ata_device
*dev
, struct scsi_cmnd
*cmd
,
3085 void (*done
)(struct scsi_cmnd
*))
3087 struct ata_scsi_args args
;
3088 const u8
*scsicmd
= cmd
->cmnd
;
3096 switch(scsicmd
[0]) {
3097 /* TODO: worth improving? */
3099 ata_scsi_invalid_field(cmd
, done
);
3103 if (scsicmd
[1] & 2) /* is CmdDt set? */
3104 ata_scsi_invalid_field(cmd
, done
);
3105 else if ((scsicmd
[1] & 1) == 0) /* is EVPD clear? */
3106 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_std
);
3107 else switch (scsicmd
[2]) {
3109 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_00
);
3112 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_80
);
3115 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_83
);
3118 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_89
);
3121 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_b1
);
3124 ata_scsi_invalid_field(cmd
, done
);
3131 ata_scsi_rbuf_fill(&args
, ata_scsiop_mode_sense
);
3134 case MODE_SELECT
: /* unconditionally return */
3135 case MODE_SELECT_10
: /* bad-field-in-cdb */
3136 ata_scsi_invalid_field(cmd
, done
);
3140 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
3143 case SERVICE_ACTION_IN
:
3144 if ((scsicmd
[1] & 0x1f) == SAI_READ_CAPACITY_16
)
3145 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
3147 ata_scsi_invalid_field(cmd
, done
);
3151 ata_scsi_rbuf_fill(&args
, ata_scsiop_report_luns
);
3155 ata_scsi_set_sense(cmd
, 0, 0, 0);
3156 cmd
->result
= (DRIVER_SENSE
<< 24);
3160 /* if we reach this, then writeback caching is disabled,
3161 * turning this into a no-op.
3163 case SYNCHRONIZE_CACHE
:
3166 /* no-op's, complete with success */
3170 case TEST_UNIT_READY
:
3171 ata_scsi_rbuf_fill(&args
, ata_scsiop_noop
);
3174 case SEND_DIAGNOSTIC
:
3175 tmp8
= scsicmd
[1] & ~(1 << 3);
3176 if ((tmp8
== 0x4) && (!scsicmd
[3]) && (!scsicmd
[4]))
3177 ata_scsi_rbuf_fill(&args
, ata_scsiop_noop
);
3179 ata_scsi_invalid_field(cmd
, done
);
3182 /* all other commands */
3184 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, 0x20, 0x0);
3185 /* "Invalid command operation code" */
3191 int ata_scsi_add_hosts(struct ata_host
*host
, struct scsi_host_template
*sht
)
3195 for (i
= 0; i
< host
->n_ports
; i
++) {
3196 struct ata_port
*ap
= host
->ports
[i
];
3197 struct Scsi_Host
*shost
;
3200 shost
= scsi_host_alloc(sht
, sizeof(struct ata_port
*));
3204 *(struct ata_port
**)&shost
->hostdata
[0] = ap
;
3205 ap
->scsi_host
= shost
;
3207 shost
->transportt
= &ata_scsi_transport_template
;
3208 shost
->unique_id
= ap
->print_id
;
3211 shost
->max_channel
= 1;
3212 shost
->max_cmd_len
= 16;
3214 /* Schedule policy is determined by ->qc_defer()
3215 * callback and it needs to see every deferred qc.
3216 * Set host_blocked to 1 to prevent SCSI midlayer from
3217 * automatically deferring requests.
3219 shost
->max_host_blocked
= 1;
3221 rc
= scsi_add_host(ap
->scsi_host
, ap
->host
->dev
);
3229 scsi_host_put(host
->ports
[i
]->scsi_host
);
3232 struct Scsi_Host
*shost
= host
->ports
[i
]->scsi_host
;
3234 scsi_remove_host(shost
);
3235 scsi_host_put(shost
);
3240 void ata_scsi_scan_host(struct ata_port
*ap
, int sync
)
3243 struct ata_device
*last_failed_dev
= NULL
;
3244 struct ata_link
*link
;
3245 struct ata_device
*dev
;
3247 if (ap
->flags
& ATA_FLAG_DISABLED
)
3251 ata_port_for_each_link(link
, ap
) {
3252 ata_link_for_each_dev(dev
, link
) {
3253 struct scsi_device
*sdev
;
3254 int channel
= 0, id
= 0;
3256 if (!ata_dev_enabled(dev
) || dev
->sdev
)
3259 if (ata_is_host_link(link
))
3262 channel
= link
->pmp
;
3264 sdev
= __scsi_add_device(ap
->scsi_host
, channel
, id
, 0,
3266 if (!IS_ERR(sdev
)) {
3268 scsi_device_put(sdev
);
3273 /* If we scanned while EH was in progress or allocation
3274 * failure occurred, scan would have failed silently. Check
3275 * whether all devices are attached.
3277 ata_port_for_each_link(link
, ap
) {
3278 ata_link_for_each_dev(dev
, link
) {
3279 if (ata_dev_enabled(dev
) && !dev
->sdev
)
3287 /* we're missing some SCSI devices */
3289 /* If caller requested synchrnous scan && we've made
3290 * any progress, sleep briefly and repeat.
3292 if (dev
!= last_failed_dev
) {
3294 last_failed_dev
= dev
;
3298 /* We might be failing to detect boot device, give it
3299 * a few more chances.
3306 ata_port_printk(ap
, KERN_ERR
, "WARNING: synchronous SCSI scan "
3307 "failed without making any progress,\n"
3308 " switching to async\n");
3311 queue_delayed_work(ata_aux_wq
, &ap
->hotplug_task
,
3312 round_jiffies_relative(HZ
));
3316 * ata_scsi_offline_dev - offline attached SCSI device
3317 * @dev: ATA device to offline attached SCSI device for
3319 * This function is called from ata_eh_hotplug() and responsible
3320 * for taking the SCSI device attached to @dev offline. This
3321 * function is called with host lock which protects dev->sdev
3325 * spin_lock_irqsave(host lock)
3328 * 1 if attached SCSI device exists, 0 otherwise.
3330 int ata_scsi_offline_dev(struct ata_device
*dev
)
3333 scsi_device_set_state(dev
->sdev
, SDEV_OFFLINE
);
3340 * ata_scsi_remove_dev - remove attached SCSI device
3341 * @dev: ATA device to remove attached SCSI device for
3343 * This function is called from ata_eh_scsi_hotplug() and
3344 * responsible for removing the SCSI device attached to @dev.
3347 * Kernel thread context (may sleep).
3349 static void ata_scsi_remove_dev(struct ata_device
*dev
)
3351 struct ata_port
*ap
= dev
->link
->ap
;
3352 struct scsi_device
*sdev
;
3353 unsigned long flags
;
3355 /* Alas, we need to grab scan_mutex to ensure SCSI device
3356 * state doesn't change underneath us and thus
3357 * scsi_device_get() always succeeds. The mutex locking can
3358 * be removed if there is __scsi_device_get() interface which
3359 * increments reference counts regardless of device state.
3361 mutex_lock(&ap
->scsi_host
->scan_mutex
);
3362 spin_lock_irqsave(ap
->lock
, flags
);
3364 /* clearing dev->sdev is protected by host lock */
3369 /* If user initiated unplug races with us, sdev can go
3370 * away underneath us after the host lock and
3371 * scan_mutex are released. Hold onto it.
3373 if (scsi_device_get(sdev
) == 0) {
3374 /* The following ensures the attached sdev is
3375 * offline on return from ata_scsi_offline_dev()
3376 * regardless it wins or loses the race
3377 * against this function.
3379 scsi_device_set_state(sdev
, SDEV_OFFLINE
);
3386 spin_unlock_irqrestore(ap
->lock
, flags
);
3387 mutex_unlock(&ap
->scsi_host
->scan_mutex
);
3390 ata_dev_printk(dev
, KERN_INFO
, "detaching (SCSI %s)\n",
3391 sdev
->sdev_gendev
.bus_id
);
3393 scsi_remove_device(sdev
);
3394 scsi_device_put(sdev
);
3398 static void ata_scsi_handle_link_detach(struct ata_link
*link
)
3400 struct ata_port
*ap
= link
->ap
;
3401 struct ata_device
*dev
;
3403 ata_link_for_each_dev(dev
, link
) {
3404 unsigned long flags
;
3406 if (!(dev
->flags
& ATA_DFLAG_DETACHED
))
3409 spin_lock_irqsave(ap
->lock
, flags
);
3410 dev
->flags
&= ~ATA_DFLAG_DETACHED
;
3411 spin_unlock_irqrestore(ap
->lock
, flags
);
3413 ata_scsi_remove_dev(dev
);
3418 * ata_scsi_media_change_notify - send media change event
3419 * @dev: Pointer to the disk device with media change event
3421 * Tell the block layer to send a media change notification
3425 * spin_lock_irqsave(host lock)
3427 void ata_scsi_media_change_notify(struct ata_device
*dev
)
3430 sdev_evt_send_simple(dev
->sdev
, SDEV_EVT_MEDIA_CHANGE
,
3435 * ata_scsi_hotplug - SCSI part of hotplug
3436 * @work: Pointer to ATA port to perform SCSI hotplug on
3438 * Perform SCSI part of hotplug. It's executed from a separate
3439 * workqueue after EH completes. This is necessary because SCSI
3440 * hot plugging requires working EH and hot unplugging is
3441 * synchronized with hot plugging with a mutex.
3444 * Kernel thread context (may sleep).
3446 void ata_scsi_hotplug(struct work_struct
*work
)
3448 struct ata_port
*ap
=
3449 container_of(work
, struct ata_port
, hotplug_task
.work
);
3452 if (ap
->pflags
& ATA_PFLAG_UNLOADING
) {
3453 DPRINTK("ENTER/EXIT - unloading\n");
3459 /* Unplug detached devices. We cannot use link iterator here
3460 * because PMP links have to be scanned even if PMP is
3461 * currently not attached. Iterate manually.
3463 ata_scsi_handle_link_detach(&ap
->link
);
3465 for (i
= 0; i
< SATA_PMP_MAX_PORTS
; i
++)
3466 ata_scsi_handle_link_detach(&ap
->pmp_link
[i
]);
3468 /* scan for new ones */
3469 ata_scsi_scan_host(ap
, 0);
3475 * ata_scsi_user_scan - indication for user-initiated bus scan
3476 * @shost: SCSI host to scan
3477 * @channel: Channel to scan
3481 * This function is called when user explicitly requests bus
3482 * scan. Set probe pending flag and invoke EH.
3485 * SCSI layer (we don't care)
3490 static int ata_scsi_user_scan(struct Scsi_Host
*shost
, unsigned int channel
,
3491 unsigned int id
, unsigned int lun
)
3493 struct ata_port
*ap
= ata_shost_to_port(shost
);
3494 unsigned long flags
;
3497 if (!ap
->ops
->error_handler
)
3500 if (lun
!= SCAN_WILD_CARD
&& lun
)
3503 if (!sata_pmp_attached(ap
)) {
3504 if (channel
!= SCAN_WILD_CARD
&& channel
)
3508 if (id
!= SCAN_WILD_CARD
&& id
)
3513 spin_lock_irqsave(ap
->lock
, flags
);
3515 if (devno
== SCAN_WILD_CARD
) {
3516 struct ata_link
*link
;
3518 ata_port_for_each_link(link
, ap
) {
3519 struct ata_eh_info
*ehi
= &link
->eh_info
;
3520 ehi
->probe_mask
|= ATA_ALL_DEVICES
;
3521 ehi
->action
|= ATA_EH_RESET
;
3524 struct ata_device
*dev
= ata_find_dev(ap
, devno
);
3527 struct ata_eh_info
*ehi
= &dev
->link
->eh_info
;
3528 ehi
->probe_mask
|= 1 << dev
->devno
;
3529 ehi
->action
|= ATA_EH_RESET
;
3535 ata_port_schedule_eh(ap
);
3536 spin_unlock_irqrestore(ap
->lock
, flags
);
3537 ata_port_wait_eh(ap
);
3539 spin_unlock_irqrestore(ap
->lock
, flags
);
3545 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
3546 * @work: Pointer to ATA port to perform scsi_rescan_device()
3548 * After ATA pass thru (SAT) commands are executed successfully,
3549 * libata need to propagate the changes to SCSI layer. This
3550 * function must be executed from ata_aux_wq such that sdev
3551 * attach/detach don't race with rescan.
3554 * Kernel thread context (may sleep).
3556 void ata_scsi_dev_rescan(struct work_struct
*work
)
3558 struct ata_port
*ap
=
3559 container_of(work
, struct ata_port
, scsi_rescan_task
);
3560 struct ata_link
*link
;
3561 struct ata_device
*dev
;
3562 unsigned long flags
;
3564 spin_lock_irqsave(ap
->lock
, flags
);
3566 ata_port_for_each_link(link
, ap
) {
3567 ata_link_for_each_dev(dev
, link
) {
3568 struct scsi_device
*sdev
= dev
->sdev
;
3570 if (!ata_dev_enabled(dev
) || !sdev
)
3572 if (scsi_device_get(sdev
))
3575 spin_unlock_irqrestore(ap
->lock
, flags
);
3576 scsi_rescan_device(&(sdev
->sdev_gendev
));
3577 scsi_device_put(sdev
);
3578 spin_lock_irqsave(ap
->lock
, flags
);
3582 spin_unlock_irqrestore(ap
->lock
, flags
);
3586 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
3587 * @host: ATA host container for all SAS ports
3588 * @port_info: Information from low-level host driver
3589 * @shost: SCSI host that the scsi device is attached to
3592 * PCI/etc. bus probe sem.
3595 * ata_port pointer on success / NULL on failure.
3598 struct ata_port
*ata_sas_port_alloc(struct ata_host
*host
,
3599 struct ata_port_info
*port_info
,
3600 struct Scsi_Host
*shost
)
3602 struct ata_port
*ap
;
3604 ap
= ata_port_alloc(host
);
3609 ap
->lock
= shost
->host_lock
;
3610 ap
->pio_mask
= port_info
->pio_mask
;
3611 ap
->mwdma_mask
= port_info
->mwdma_mask
;
3612 ap
->udma_mask
= port_info
->udma_mask
;
3613 ap
->flags
|= port_info
->flags
;
3614 ap
->ops
= port_info
->port_ops
;
3615 ap
->cbl
= ATA_CBL_SATA
;
3619 EXPORT_SYMBOL_GPL(ata_sas_port_alloc
);
3622 * ata_sas_port_start - Set port up for dma.
3623 * @ap: Port to initialize
3625 * Called just after data structures for each port are
3628 * May be used as the port_start() entry in ata_port_operations.
3631 * Inherited from caller.
3633 int ata_sas_port_start(struct ata_port
*ap
)
3637 EXPORT_SYMBOL_GPL(ata_sas_port_start
);
3640 * ata_port_stop - Undo ata_sas_port_start()
3641 * @ap: Port to shut down
3643 * May be used as the port_stop() entry in ata_port_operations.
3646 * Inherited from caller.
3649 void ata_sas_port_stop(struct ata_port
*ap
)
3652 EXPORT_SYMBOL_GPL(ata_sas_port_stop
);
3655 * ata_sas_port_init - Initialize a SATA device
3656 * @ap: SATA port to initialize
3659 * PCI/etc. bus probe sem.
3662 * Zero on success, non-zero on error.
3665 int ata_sas_port_init(struct ata_port
*ap
)
3667 int rc
= ap
->ops
->port_start(ap
);
3670 ap
->print_id
= ata_print_id
++;
3671 rc
= ata_bus_probe(ap
);
3676 EXPORT_SYMBOL_GPL(ata_sas_port_init
);
3679 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3680 * @ap: SATA port to destroy
3684 void ata_sas_port_destroy(struct ata_port
*ap
)
3686 if (ap
->ops
->port_stop
)
3687 ap
->ops
->port_stop(ap
);
3690 EXPORT_SYMBOL_GPL(ata_sas_port_destroy
);
3693 * ata_sas_slave_configure - Default slave_config routine for libata devices
3694 * @sdev: SCSI device to configure
3695 * @ap: ATA port to which SCSI device is attached
3701 int ata_sas_slave_configure(struct scsi_device
*sdev
, struct ata_port
*ap
)
3703 ata_scsi_sdev_config(sdev
);
3704 ata_scsi_dev_config(sdev
, ap
->link
.device
);
3707 EXPORT_SYMBOL_GPL(ata_sas_slave_configure
);
3710 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3711 * @cmd: SCSI command to be sent
3712 * @done: Completion function, called when command is complete
3713 * @ap: ATA port to which the command is being sent
3716 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3720 int ata_sas_queuecmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*),
3721 struct ata_port
*ap
)
3725 ata_scsi_dump_cdb(ap
, cmd
);
3727 if (likely(ata_dev_enabled(ap
->link
.device
)))
3728 rc
= __ata_scsi_queuecmd(cmd
, done
, ap
->link
.device
);
3730 cmd
->result
= (DID_BAD_TARGET
<< 16);
3735 EXPORT_SYMBOL_GPL(ata_sas_queuecmd
);