2 * libata-scsi.c - helper library for ATA
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * Hardware documentation available from
31 * - http://www.t10.org/
32 * - http://www.t13.org/
36 #include <linux/slab.h>
37 #include <linux/kernel.h>
38 #include <linux/blkdev.h>
39 #include <linux/spinlock.h>
40 #include <scsi/scsi.h>
41 #include <scsi/scsi_host.h>
42 #include <scsi/scsi_cmnd.h>
43 #include <scsi/scsi_eh.h>
44 #include <scsi/scsi_device.h>
45 #include <scsi/scsi_tcq.h>
46 #include <scsi/scsi_transport.h>
47 #include <linux/libata.h>
48 #include <linux/hdreg.h>
49 #include <linux/uaccess.h>
50 #include <linux/suspend.h>
51 #include <asm/unaligned.h>
55 #define SECTOR_SIZE 512
56 #define ATA_SCSI_RBUF_SIZE 4096
58 static DEFINE_SPINLOCK(ata_scsi_rbuf_lock
);
59 static u8 ata_scsi_rbuf
[ATA_SCSI_RBUF_SIZE
];
61 typedef unsigned int (*ata_xlat_func_t
)(struct ata_queued_cmd
*qc
);
63 static struct ata_device
*__ata_scsi_find_dev(struct ata_port
*ap
,
64 const struct scsi_device
*scsidev
);
65 static struct ata_device
*ata_scsi_find_dev(struct ata_port
*ap
,
66 const struct scsi_device
*scsidev
);
67 static int ata_scsi_user_scan(struct Scsi_Host
*shost
, unsigned int channel
,
68 unsigned int id
, unsigned int lun
);
71 #define RW_RECOVERY_MPAGE 0x1
72 #define RW_RECOVERY_MPAGE_LEN 12
73 #define CACHE_MPAGE 0x8
74 #define CACHE_MPAGE_LEN 20
75 #define CONTROL_MPAGE 0xa
76 #define CONTROL_MPAGE_LEN 12
77 #define ALL_MPAGES 0x3f
78 #define ALL_SUB_MPAGES 0xff
81 static const u8 def_rw_recovery_mpage
[RW_RECOVERY_MPAGE_LEN
] = {
83 RW_RECOVERY_MPAGE_LEN
- 2,
85 0, /* read retry count */
87 0, /* write retry count */
91 static const u8 def_cache_mpage
[CACHE_MPAGE_LEN
] = {
94 0, /* contains WCE, needs to be 0 for logic */
95 0, 0, 0, 0, 0, 0, 0, 0, 0,
96 0, /* contains DRA, needs to be 0 for logic */
100 static const u8 def_control_mpage
[CONTROL_MPAGE_LEN
] = {
102 CONTROL_MPAGE_LEN
- 2,
103 2, /* DSENSE=0, GLTSD=1 */
104 0, /* [QAM+QERR may be 1, see 05-359r1] */
105 0, 0, 0, 0, 0xff, 0xff,
106 0, 30 /* extended self test time, see 05-359r1 */
110 * libata transport template. libata doesn't do real transport stuff.
111 * It just needs the eh_timed_out hook.
113 static struct scsi_transport_template ata_scsi_transport_template
= {
114 .eh_strategy_handler
= ata_scsi_error
,
115 .eh_timed_out
= ata_scsi_timed_out
,
116 .user_scan
= ata_scsi_user_scan
,
120 static const struct {
123 } link_pm_policy
[] = {
124 { NOT_AVAILABLE
, "max_performance" },
125 { MIN_POWER
, "min_power" },
126 { MAX_PERFORMANCE
, "max_performance" },
127 { MEDIUM_POWER
, "medium_power" },
130 static const char *ata_scsi_lpm_get(enum link_pm policy
)
134 for (i
= 0; i
< ARRAY_SIZE(link_pm_policy
); i
++)
135 if (link_pm_policy
[i
].value
== policy
)
136 return link_pm_policy
[i
].name
;
141 static ssize_t
ata_scsi_lpm_put(struct device
*dev
,
142 struct device_attribute
*attr
,
143 const char *buf
, size_t count
)
145 struct Scsi_Host
*shost
= class_to_shost(dev
);
146 struct ata_port
*ap
= ata_shost_to_port(shost
);
147 enum link_pm policy
= 0;
151 * we are skipping array location 0 on purpose - this
152 * is because a value of NOT_AVAILABLE is displayed
153 * to the user as max_performance, but when the user
154 * writes "max_performance", they actually want the
155 * value to match MAX_PERFORMANCE.
157 for (i
= 1; i
< ARRAY_SIZE(link_pm_policy
); i
++) {
158 const int len
= strlen(link_pm_policy
[i
].name
);
159 if (strncmp(link_pm_policy
[i
].name
, buf
, len
) == 0) {
160 policy
= link_pm_policy
[i
].value
;
167 ata_lpm_schedule(ap
, policy
);
172 ata_scsi_lpm_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
174 struct Scsi_Host
*shost
= class_to_shost(dev
);
175 struct ata_port
*ap
= ata_shost_to_port(shost
);
177 ata_scsi_lpm_get(ap
->pm_policy
);
182 return snprintf(buf
, 23, "%s\n", policy
);
184 DEVICE_ATTR(link_power_management_policy
, S_IRUGO
| S_IWUSR
,
185 ata_scsi_lpm_show
, ata_scsi_lpm_put
);
186 EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy
);
188 static ssize_t
ata_scsi_park_show(struct device
*device
,
189 struct device_attribute
*attr
, char *buf
)
191 struct scsi_device
*sdev
= to_scsi_device(device
);
193 struct ata_link
*link
;
194 struct ata_device
*dev
;
195 unsigned long flags
, now
;
196 unsigned int uninitialized_var(msecs
);
199 ap
= ata_shost_to_port(sdev
->host
);
201 spin_lock_irqsave(ap
->lock
, flags
);
202 dev
= ata_scsi_find_dev(ap
, sdev
);
207 if (dev
->flags
& ATA_DFLAG_NO_UNLOAD
) {
214 if (ap
->pflags
& ATA_PFLAG_EH_IN_PROGRESS
&&
215 link
->eh_context
.unloaded_mask
& (1 << dev
->devno
) &&
216 time_after(dev
->unpark_deadline
, now
))
217 msecs
= jiffies_to_msecs(dev
->unpark_deadline
- now
);
222 spin_unlock_irq(ap
->lock
);
224 return rc
? rc
: snprintf(buf
, 20, "%u\n", msecs
);
227 static ssize_t
ata_scsi_park_store(struct device
*device
,
228 struct device_attribute
*attr
,
229 const char *buf
, size_t len
)
231 struct scsi_device
*sdev
= to_scsi_device(device
);
233 struct ata_device
*dev
;
238 rc
= strict_strtol(buf
, 10, &input
);
239 if (rc
|| input
< -2)
241 if (input
> ATA_TMOUT_MAX_PARK
) {
243 input
= ATA_TMOUT_MAX_PARK
;
246 ap
= ata_shost_to_port(sdev
->host
);
248 spin_lock_irqsave(ap
->lock
, flags
);
249 dev
= ata_scsi_find_dev(ap
, sdev
);
250 if (unlikely(!dev
)) {
254 if (dev
->class != ATA_DEV_ATA
) {
260 if (dev
->flags
& ATA_DFLAG_NO_UNLOAD
) {
265 dev
->unpark_deadline
= ata_deadline(jiffies
, input
);
266 dev
->link
->eh_info
.dev_action
[dev
->devno
] |= ATA_EH_PARK
;
267 ata_port_schedule_eh(ap
);
268 complete(&ap
->park_req_pending
);
272 dev
->flags
&= ~ATA_DFLAG_NO_UNLOAD
;
275 dev
->flags
|= ATA_DFLAG_NO_UNLOAD
;
280 spin_unlock_irqrestore(ap
->lock
, flags
);
282 return rc
? rc
: len
;
284 DEVICE_ATTR(unload_heads
, S_IRUGO
| S_IWUSR
,
285 ata_scsi_park_show
, ata_scsi_park_store
);
286 EXPORT_SYMBOL_GPL(dev_attr_unload_heads
);
288 static void ata_scsi_set_sense(struct scsi_cmnd
*cmd
, u8 sk
, u8 asc
, u8 ascq
)
290 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
292 scsi_build_sense_buffer(0, cmd
->sense_buffer
, sk
, asc
, ascq
);
296 ata_scsi_em_message_store(struct device
*dev
, struct device_attribute
*attr
,
297 const char *buf
, size_t count
)
299 struct Scsi_Host
*shost
= class_to_shost(dev
);
300 struct ata_port
*ap
= ata_shost_to_port(shost
);
301 if (ap
->ops
->em_store
&& (ap
->flags
& ATA_FLAG_EM
))
302 return ap
->ops
->em_store(ap
, buf
, count
);
307 ata_scsi_em_message_show(struct device
*dev
, struct device_attribute
*attr
,
310 struct Scsi_Host
*shost
= class_to_shost(dev
);
311 struct ata_port
*ap
= ata_shost_to_port(shost
);
313 if (ap
->ops
->em_show
&& (ap
->flags
& ATA_FLAG_EM
))
314 return ap
->ops
->em_show(ap
, buf
);
317 DEVICE_ATTR(em_message
, S_IRUGO
| S_IWUSR
,
318 ata_scsi_em_message_show
, ata_scsi_em_message_store
);
319 EXPORT_SYMBOL_GPL(dev_attr_em_message
);
322 ata_scsi_em_message_type_show(struct device
*dev
, struct device_attribute
*attr
,
325 struct Scsi_Host
*shost
= class_to_shost(dev
);
326 struct ata_port
*ap
= ata_shost_to_port(shost
);
328 return snprintf(buf
, 23, "%d\n", ap
->em_message_type
);
330 DEVICE_ATTR(em_message_type
, S_IRUGO
,
331 ata_scsi_em_message_type_show
, NULL
);
332 EXPORT_SYMBOL_GPL(dev_attr_em_message_type
);
335 ata_scsi_activity_show(struct device
*dev
, struct device_attribute
*attr
,
338 struct scsi_device
*sdev
= to_scsi_device(dev
);
339 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
340 struct ata_device
*atadev
= ata_scsi_find_dev(ap
, sdev
);
342 if (ap
->ops
->sw_activity_show
&& (ap
->flags
& ATA_FLAG_SW_ACTIVITY
))
343 return ap
->ops
->sw_activity_show(atadev
, buf
);
348 ata_scsi_activity_store(struct device
*dev
, struct device_attribute
*attr
,
349 const char *buf
, size_t count
)
351 struct scsi_device
*sdev
= to_scsi_device(dev
);
352 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
353 struct ata_device
*atadev
= ata_scsi_find_dev(ap
, sdev
);
354 enum sw_activity val
;
357 if (ap
->ops
->sw_activity_store
&& (ap
->flags
& ATA_FLAG_SW_ACTIVITY
)) {
358 val
= simple_strtoul(buf
, NULL
, 0);
360 case OFF
: case BLINK_ON
: case BLINK_OFF
:
361 rc
= ap
->ops
->sw_activity_store(atadev
, val
);
370 DEVICE_ATTR(sw_activity
, S_IWUSR
| S_IRUGO
, ata_scsi_activity_show
,
371 ata_scsi_activity_store
);
372 EXPORT_SYMBOL_GPL(dev_attr_sw_activity
);
374 struct device_attribute
*ata_common_sdev_attrs
[] = {
375 &dev_attr_unload_heads
,
378 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs
);
380 static void ata_scsi_invalid_field(struct scsi_cmnd
*cmd
,
381 void (*done
)(struct scsi_cmnd
*))
383 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
384 /* "Invalid field in cbd" */
389 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
390 * @sdev: SCSI device for which BIOS geometry is to be determined
391 * @bdev: block device associated with @sdev
392 * @capacity: capacity of SCSI device
393 * @geom: location to which geometry will be output
395 * Generic bios head/sector/cylinder calculator
396 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
397 * mapping. Some situations may arise where the disk is not
398 * bootable if this is not used.
401 * Defined by the SCSI layer. We don't really care.
406 int ata_std_bios_param(struct scsi_device
*sdev
, struct block_device
*bdev
,
407 sector_t capacity
, int geom
[])
411 sector_div(capacity
, 255*63);
418 * ata_scsi_unlock_native_capacity - unlock native capacity
419 * @sdev: SCSI device to adjust device capacity for
421 * This function is called if a partition on @sdev extends beyond
422 * the end of the device. It requests EH to unlock HPA.
425 * Defined by the SCSI layer. Might sleep.
427 void ata_scsi_unlock_native_capacity(struct scsi_device
*sdev
)
429 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
430 struct ata_device
*dev
;
433 spin_lock_irqsave(ap
->lock
, flags
);
435 dev
= ata_scsi_find_dev(ap
, sdev
);
436 if (dev
&& dev
->n_sectors
< dev
->n_native_sectors
) {
437 dev
->flags
|= ATA_DFLAG_UNLOCK_HPA
;
438 dev
->link
->eh_info
.action
|= ATA_EH_RESET
;
439 ata_port_schedule_eh(ap
);
442 spin_unlock_irqrestore(ap
->lock
, flags
);
443 ata_port_wait_eh(ap
);
447 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
449 * @sdev: SCSI device to get identify data for
450 * @arg: User buffer area for identify data
453 * Defined by the SCSI layer. We don't really care.
456 * Zero on success, negative errno on error.
458 static int ata_get_identity(struct ata_port
*ap
, struct scsi_device
*sdev
,
461 struct ata_device
*dev
= ata_scsi_find_dev(ap
, sdev
);
462 u16 __user
*dst
= arg
;
468 if (copy_to_user(dst
, dev
->id
, ATA_ID_WORDS
* sizeof(u16
)))
471 ata_id_string(dev
->id
, buf
, ATA_ID_PROD
, ATA_ID_PROD_LEN
);
472 if (copy_to_user(dst
+ ATA_ID_PROD
, buf
, ATA_ID_PROD_LEN
))
475 ata_id_string(dev
->id
, buf
, ATA_ID_FW_REV
, ATA_ID_FW_REV_LEN
);
476 if (copy_to_user(dst
+ ATA_ID_FW_REV
, buf
, ATA_ID_FW_REV_LEN
))
479 ata_id_string(dev
->id
, buf
, ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
480 if (copy_to_user(dst
+ ATA_ID_SERNO
, buf
, ATA_ID_SERNO_LEN
))
487 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
488 * @scsidev: Device to which we are issuing command
489 * @arg: User provided data for issuing command
492 * Defined by the SCSI layer. We don't really care.
495 * Zero on success, negative errno on error.
497 int ata_cmd_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
500 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
501 u8 args
[4], *argbuf
= NULL
, *sensebuf
= NULL
;
503 enum dma_data_direction data_dir
;
509 if (copy_from_user(args
, arg
, sizeof(args
)))
512 sensebuf
= kzalloc(SCSI_SENSE_BUFFERSIZE
, GFP_NOIO
);
516 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
519 argsize
= SECTOR_SIZE
* args
[3];
520 argbuf
= kmalloc(argsize
, GFP_KERNEL
);
521 if (argbuf
== NULL
) {
526 scsi_cmd
[1] = (4 << 1); /* PIO Data-in */
527 scsi_cmd
[2] = 0x0e; /* no off.line or cc, read from dev,
528 block count in sector count field */
529 data_dir
= DMA_FROM_DEVICE
;
531 scsi_cmd
[1] = (3 << 1); /* Non-data */
532 scsi_cmd
[2] = 0x20; /* cc but no off.line or data xfer */
536 scsi_cmd
[0] = ATA_16
;
538 scsi_cmd
[4] = args
[2];
539 if (args
[0] == ATA_CMD_SMART
) { /* hack -- ide driver does this too */
540 scsi_cmd
[6] = args
[3];
541 scsi_cmd
[8] = args
[1];
545 scsi_cmd
[6] = args
[1];
547 scsi_cmd
[14] = args
[0];
549 /* Good values for timeout and retries? Values below
550 from scsi_ioctl_send_command() for default case... */
551 cmd_result
= scsi_execute(scsidev
, scsi_cmd
, data_dir
, argbuf
, argsize
,
552 sensebuf
, (10*HZ
), 5, 0, NULL
);
554 if (driver_byte(cmd_result
) == DRIVER_SENSE
) {/* sense data available */
555 u8
*desc
= sensebuf
+ 8;
556 cmd_result
&= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
558 /* If we set cc then ATA pass-through will cause a
559 * check condition even if no error. Filter that. */
560 if (cmd_result
& SAM_STAT_CHECK_CONDITION
) {
561 struct scsi_sense_hdr sshdr
;
562 scsi_normalize_sense(sensebuf
, SCSI_SENSE_BUFFERSIZE
,
564 if (sshdr
.sense_key
== 0 &&
565 sshdr
.asc
== 0 && sshdr
.ascq
== 0)
566 cmd_result
&= ~SAM_STAT_CHECK_CONDITION
;
569 /* Send userspace a few ATA registers (same as drivers/ide) */
570 if (sensebuf
[0] == 0x72 && /* format is "descriptor" */
571 desc
[0] == 0x09) { /* code is "ATA Descriptor" */
572 args
[0] = desc
[13]; /* status */
573 args
[1] = desc
[3]; /* error */
574 args
[2] = desc
[5]; /* sector count (0:7) */
575 if (copy_to_user(arg
, args
, sizeof(args
)))
587 && copy_to_user(arg
+ sizeof(args
), argbuf
, argsize
))
596 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
597 * @scsidev: Device to which we are issuing command
598 * @arg: User provided data for issuing command
601 * Defined by the SCSI layer. We don't really care.
604 * Zero on success, negative errno on error.
606 int ata_task_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
609 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
610 u8 args
[7], *sensebuf
= NULL
;
616 if (copy_from_user(args
, arg
, sizeof(args
)))
619 sensebuf
= kzalloc(SCSI_SENSE_BUFFERSIZE
, GFP_NOIO
);
623 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
624 scsi_cmd
[0] = ATA_16
;
625 scsi_cmd
[1] = (3 << 1); /* Non-data */
626 scsi_cmd
[2] = 0x20; /* cc but no off.line or data xfer */
627 scsi_cmd
[4] = args
[1];
628 scsi_cmd
[6] = args
[2];
629 scsi_cmd
[8] = args
[3];
630 scsi_cmd
[10] = args
[4];
631 scsi_cmd
[12] = args
[5];
632 scsi_cmd
[13] = args
[6] & 0x4f;
633 scsi_cmd
[14] = args
[0];
635 /* Good values for timeout and retries? Values below
636 from scsi_ioctl_send_command() for default case... */
637 cmd_result
= scsi_execute(scsidev
, scsi_cmd
, DMA_NONE
, NULL
, 0,
638 sensebuf
, (10*HZ
), 5, 0, NULL
);
640 if (driver_byte(cmd_result
) == DRIVER_SENSE
) {/* sense data available */
641 u8
*desc
= sensebuf
+ 8;
642 cmd_result
&= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
644 /* If we set cc then ATA pass-through will cause a
645 * check condition even if no error. Filter that. */
646 if (cmd_result
& SAM_STAT_CHECK_CONDITION
) {
647 struct scsi_sense_hdr sshdr
;
648 scsi_normalize_sense(sensebuf
, SCSI_SENSE_BUFFERSIZE
,
650 if (sshdr
.sense_key
== 0 &&
651 sshdr
.asc
== 0 && sshdr
.ascq
== 0)
652 cmd_result
&= ~SAM_STAT_CHECK_CONDITION
;
655 /* Send userspace ATA registers */
656 if (sensebuf
[0] == 0x72 && /* format is "descriptor" */
657 desc
[0] == 0x09) {/* code is "ATA Descriptor" */
658 args
[0] = desc
[13]; /* status */
659 args
[1] = desc
[3]; /* error */
660 args
[2] = desc
[5]; /* sector count (0:7) */
661 args
[3] = desc
[7]; /* lbal */
662 args
[4] = desc
[9]; /* lbam */
663 args
[5] = desc
[11]; /* lbah */
664 args
[6] = desc
[12]; /* select */
665 if (copy_to_user(arg
, args
, sizeof(args
)))
680 static int ata_ioc32(struct ata_port
*ap
)
682 if (ap
->flags
& ATA_FLAG_PIO_DMA
)
684 if (ap
->pflags
& ATA_PFLAG_PIO32
)
689 int ata_sas_scsi_ioctl(struct ata_port
*ap
, struct scsi_device
*scsidev
,
690 int cmd
, void __user
*arg
)
692 int val
= -EINVAL
, rc
= -EINVAL
;
696 case ATA_IOC_GET_IO32
:
697 spin_lock_irqsave(ap
->lock
, flags
);
699 spin_unlock_irqrestore(ap
->lock
, flags
);
700 if (copy_to_user(arg
, &val
, 1))
704 case ATA_IOC_SET_IO32
:
705 val
= (unsigned long) arg
;
707 spin_lock_irqsave(ap
->lock
, flags
);
708 if (ap
->pflags
& ATA_PFLAG_PIO32CHANGE
) {
710 ap
->pflags
|= ATA_PFLAG_PIO32
;
712 ap
->pflags
&= ~ATA_PFLAG_PIO32
;
714 if (val
!= ata_ioc32(ap
))
717 spin_unlock_irqrestore(ap
->lock
, flags
);
720 case HDIO_GET_IDENTITY
:
721 return ata_get_identity(ap
, scsidev
, arg
);
724 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
726 return ata_cmd_ioctl(scsidev
, arg
);
728 case HDIO_DRIVE_TASK
:
729 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
731 return ata_task_ioctl(scsidev
, arg
);
740 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl
);
742 int ata_scsi_ioctl(struct scsi_device
*scsidev
, int cmd
, void __user
*arg
)
744 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev
->host
),
747 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
750 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
751 * @dev: ATA device to which the new command is attached
752 * @cmd: SCSI command that originated this ATA command
753 * @done: SCSI command completion function
755 * Obtain a reference to an unused ata_queued_cmd structure,
756 * which is the basic libata structure representing a single
757 * ATA command sent to the hardware.
759 * If a command was available, fill in the SCSI-specific
760 * portions of the structure with information on the
764 * spin_lock_irqsave(host lock)
767 * Command allocated, or %NULL if none available.
769 static struct ata_queued_cmd
*ata_scsi_qc_new(struct ata_device
*dev
,
770 struct scsi_cmnd
*cmd
,
771 void (*done
)(struct scsi_cmnd
*))
773 struct ata_queued_cmd
*qc
;
775 qc
= ata_qc_new_init(dev
);
780 qc
->sg
= scsi_sglist(cmd
);
781 qc
->n_elem
= scsi_sg_count(cmd
);
783 cmd
->result
= (DID_OK
<< 16) | (QUEUE_FULL
<< 1);
790 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd
*qc
)
792 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
794 qc
->extrabytes
= scmd
->request
->extra_len
;
795 qc
->nbytes
= scsi_bufflen(scmd
) + qc
->extrabytes
;
799 * ata_dump_status - user friendly display of error info
800 * @id: id of the port in question
801 * @tf: ptr to filled out taskfile
803 * Decode and dump the ATA error/status registers for the user so
804 * that they have some idea what really happened at the non
805 * make-believe layer.
808 * inherited from caller
810 static void ata_dump_status(unsigned id
, struct ata_taskfile
*tf
)
812 u8 stat
= tf
->command
, err
= tf
->feature
;
814 printk(KERN_WARNING
"ata%u: status=0x%02x { ", id
, stat
);
815 if (stat
& ATA_BUSY
) {
816 printk("Busy }\n"); /* Data is not valid in this case */
818 if (stat
& 0x40) printk("DriveReady ");
819 if (stat
& 0x20) printk("DeviceFault ");
820 if (stat
& 0x10) printk("SeekComplete ");
821 if (stat
& 0x08) printk("DataRequest ");
822 if (stat
& 0x04) printk("CorrectedError ");
823 if (stat
& 0x02) printk("Index ");
824 if (stat
& 0x01) printk("Error ");
828 printk(KERN_WARNING
"ata%u: error=0x%02x { ", id
, err
);
829 if (err
& 0x04) printk("DriveStatusError ");
831 if (err
& 0x04) printk("BadCRC ");
832 else printk("Sector ");
834 if (err
& 0x40) printk("UncorrectableError ");
835 if (err
& 0x10) printk("SectorIdNotFound ");
836 if (err
& 0x02) printk("TrackZeroNotFound ");
837 if (err
& 0x01) printk("AddrMarkNotFound ");
844 * ata_to_sense_error - convert ATA error to SCSI error
845 * @id: ATA device number
846 * @drv_stat: value contained in ATA status register
847 * @drv_err: value contained in ATA error register
848 * @sk: the sense key we'll fill out
849 * @asc: the additional sense code we'll fill out
850 * @ascq: the additional sense code qualifier we'll fill out
851 * @verbose: be verbose
853 * Converts an ATA error into a SCSI error. Fill out pointers to
854 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
855 * format sense blocks.
858 * spin_lock_irqsave(host lock)
860 static void ata_to_sense_error(unsigned id
, u8 drv_stat
, u8 drv_err
, u8
*sk
,
861 u8
*asc
, u8
*ascq
, int verbose
)
865 /* Based on the 3ware driver translation table */
866 static const unsigned char sense_table
[][4] = {
868 {0xd1, ABORTED_COMMAND
, 0x00, 0x00}, // Device busy Aborted command
870 {0xd0, ABORTED_COMMAND
, 0x00, 0x00}, // Device busy Aborted command
872 {0x61, HARDWARE_ERROR
, 0x00, 0x00}, // Device fault Hardware error
873 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
874 {0x84, ABORTED_COMMAND
, 0x47, 0x00}, // Data CRC error SCSI parity error
875 /* MC|ID|ABRT|TRK0|MARK */
876 {0x37, NOT_READY
, 0x04, 0x00}, // Unit offline Not ready
878 {0x09, NOT_READY
, 0x04, 0x00}, // Unrecovered disk error Not ready
879 /* Bad address mark */
880 {0x01, MEDIUM_ERROR
, 0x13, 0x00}, // Address mark not found Address mark not found for data field
882 {0x02, HARDWARE_ERROR
, 0x00, 0x00}, // Track 0 not found Hardware error
884 {0x04, ABORTED_COMMAND
, 0x00, 0x00}, // Aborted command Aborted command
885 /* Media change request */
886 {0x08, NOT_READY
, 0x04, 0x00}, // Media change request FIXME: faking offline
888 {0x10, ABORTED_COMMAND
, 0x14, 0x00}, // ID not found Recorded entity not found
890 {0x08, NOT_READY
, 0x04, 0x00}, // Media change FIXME: faking offline
892 {0x40, MEDIUM_ERROR
, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
893 /* BBD - block marked bad */
894 {0x80, MEDIUM_ERROR
, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
895 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
897 static const unsigned char stat_table
[][4] = {
898 /* Must be first because BUSY means no other bits valid */
899 {0x80, ABORTED_COMMAND
, 0x47, 0x00}, // Busy, fake parity for now
900 {0x20, HARDWARE_ERROR
, 0x00, 0x00}, // Device fault
901 {0x08, ABORTED_COMMAND
, 0x47, 0x00}, // Timed out in xfer, fake parity for now
902 {0x04, RECOVERED_ERROR
, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
903 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
907 * Is this an error we can process/parse
909 if (drv_stat
& ATA_BUSY
) {
910 drv_err
= 0; /* Ignore the err bits, they're invalid */
914 /* Look for drv_err */
915 for (i
= 0; sense_table
[i
][0] != 0xFF; i
++) {
916 /* Look for best matches first */
917 if ((sense_table
[i
][0] & drv_err
) ==
919 *sk
= sense_table
[i
][1];
920 *asc
= sense_table
[i
][2];
921 *ascq
= sense_table
[i
][3];
925 /* No immediate match */
927 printk(KERN_WARNING
"ata%u: no sense translation for "
928 "error 0x%02x\n", id
, drv_err
);
931 /* Fall back to interpreting status bits */
932 for (i
= 0; stat_table
[i
][0] != 0xFF; i
++) {
933 if (stat_table
[i
][0] & drv_stat
) {
934 *sk
= stat_table
[i
][1];
935 *asc
= stat_table
[i
][2];
936 *ascq
= stat_table
[i
][3];
940 /* No error? Undecoded? */
942 printk(KERN_WARNING
"ata%u: no sense translation for "
943 "status: 0x%02x\n", id
, drv_stat
);
945 /* We need a sensible error return here, which is tricky, and one
946 that won't cause people to do things like return a disk wrongly */
947 *sk
= ABORTED_COMMAND
;
953 printk(KERN_ERR
"ata%u: translated ATA stat/err 0x%02x/%02x "
954 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
955 id
, drv_stat
, drv_err
, *sk
, *asc
, *ascq
);
960 * ata_gen_passthru_sense - Generate check condition sense block.
961 * @qc: Command that completed.
963 * This function is specific to the ATA descriptor format sense
964 * block specified for the ATA pass through commands. Regardless
965 * of whether the command errored or not, return a sense
966 * block. Copy all controller registers into the sense
967 * block. Clear sense key, ASC & ASCQ if there is no error.
972 static void ata_gen_passthru_sense(struct ata_queued_cmd
*qc
)
974 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
975 struct ata_taskfile
*tf
= &qc
->result_tf
;
976 unsigned char *sb
= cmd
->sense_buffer
;
977 unsigned char *desc
= sb
+ 8;
978 int verbose
= qc
->ap
->ops
->error_handler
== NULL
;
980 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
982 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
985 * Use ata_to_sense_error() to map status register bits
986 * onto sense key, asc & ascq.
989 tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
990 ata_to_sense_error(qc
->ap
->print_id
, tf
->command
, tf
->feature
,
991 &sb
[1], &sb
[2], &sb
[3], verbose
);
996 * Sense data is current and format is descriptor.
1002 /* set length of additional sense data */
1007 * Copy registers into sense buffer.
1010 desc
[3] = tf
->feature
; /* == error reg */
1011 desc
[5] = tf
->nsect
;
1014 desc
[11] = tf
->lbah
;
1015 desc
[12] = tf
->device
;
1016 desc
[13] = tf
->command
; /* == status reg */
1019 * Fill in Extend bit, and the high order bytes
1022 if (tf
->flags
& ATA_TFLAG_LBA48
) {
1024 desc
[4] = tf
->hob_nsect
;
1025 desc
[6] = tf
->hob_lbal
;
1026 desc
[8] = tf
->hob_lbam
;
1027 desc
[10] = tf
->hob_lbah
;
1032 * ata_gen_ata_sense - generate a SCSI fixed sense block
1033 * @qc: Command that we are erroring out
1035 * Generate sense block for a failed ATA command @qc. Descriptor
1036 * format is used to accomodate LBA48 block address.
1041 static void ata_gen_ata_sense(struct ata_queued_cmd
*qc
)
1043 struct ata_device
*dev
= qc
->dev
;
1044 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1045 struct ata_taskfile
*tf
= &qc
->result_tf
;
1046 unsigned char *sb
= cmd
->sense_buffer
;
1047 unsigned char *desc
= sb
+ 8;
1048 int verbose
= qc
->ap
->ops
->error_handler
== NULL
;
1051 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
1053 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
1055 /* sense data is current and format is descriptor */
1058 /* Use ata_to_sense_error() to map status register bits
1059 * onto sense key, asc & ascq.
1062 tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
1063 ata_to_sense_error(qc
->ap
->print_id
, tf
->command
, tf
->feature
,
1064 &sb
[1], &sb
[2], &sb
[3], verbose
);
1068 block
= ata_tf_read_block(&qc
->result_tf
, dev
);
1070 /* information sense data descriptor */
1075 desc
[2] |= 0x80; /* valid */
1076 desc
[6] = block
>> 40;
1077 desc
[7] = block
>> 32;
1078 desc
[8] = block
>> 24;
1079 desc
[9] = block
>> 16;
1080 desc
[10] = block
>> 8;
1084 static void ata_scsi_sdev_config(struct scsi_device
*sdev
)
1086 sdev
->use_10_for_rw
= 1;
1087 sdev
->use_10_for_ms
= 1;
1089 /* Schedule policy is determined by ->qc_defer() callback and
1090 * it needs to see every deferred qc. Set dev_blocked to 1 to
1091 * prevent SCSI midlayer from automatically deferring
1094 sdev
->max_device_blocked
= 1;
1098 * atapi_drain_needed - Check whether data transfer may overflow
1099 * @rq: request to be checked
1101 * ATAPI commands which transfer variable length data to host
1102 * might overflow due to application error or hardare bug. This
1103 * function checks whether overflow should be drained and ignored
1110 * 1 if ; otherwise, 0.
1112 static int atapi_drain_needed(struct request
*rq
)
1114 if (likely(!blk_pc_request(rq
)))
1117 if (!blk_rq_bytes(rq
) || (rq
->cmd_flags
& REQ_RW
))
1120 return atapi_cmd_type(rq
->cmd
[0]) == ATAPI_MISC
;
1123 static int ata_scsi_dev_config(struct scsi_device
*sdev
,
1124 struct ata_device
*dev
)
1126 if (!ata_id_has_unload(dev
->id
))
1127 dev
->flags
|= ATA_DFLAG_NO_UNLOAD
;
1129 /* configure max sectors */
1130 blk_queue_max_hw_sectors(sdev
->request_queue
, dev
->max_sectors
);
1132 sdev
->sector_size
= ATA_SECT_SIZE
;
1134 if (dev
->class == ATA_DEV_ATAPI
) {
1135 struct request_queue
*q
= sdev
->request_queue
;
1138 /* set DMA padding */
1139 blk_queue_update_dma_pad(sdev
->request_queue
,
1140 ATA_DMA_PAD_SZ
- 1);
1142 /* configure draining */
1143 buf
= kmalloc(ATAPI_MAX_DRAIN
, q
->bounce_gfp
| GFP_KERNEL
);
1145 ata_dev_printk(dev
, KERN_ERR
,
1146 "drain buffer allocation failed\n");
1150 blk_queue_dma_drain(q
, atapi_drain_needed
, buf
, ATAPI_MAX_DRAIN
);
1152 sdev
->manage_start_stop
= 1;
1156 * ata_pio_sectors() expects buffer for each sector to not cross
1157 * page boundary. Enforce it by requiring buffers to be sector
1158 * aligned, which works iff sector_size is not larger than
1159 * PAGE_SIZE. ATAPI devices also need the alignment as
1160 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1162 if (sdev
->sector_size
> PAGE_SIZE
)
1163 ata_dev_printk(dev
, KERN_WARNING
,
1164 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1167 blk_queue_update_dma_alignment(sdev
->request_queue
,
1168 sdev
->sector_size
- 1);
1170 if (dev
->flags
& ATA_DFLAG_AN
)
1171 set_bit(SDEV_EVT_MEDIA_CHANGE
, sdev
->supported_events
);
1173 if (dev
->flags
& ATA_DFLAG_NCQ
) {
1176 depth
= min(sdev
->host
->can_queue
, ata_id_queue_depth(dev
->id
));
1177 depth
= min(ATA_MAX_QUEUE
- 1, depth
);
1178 scsi_adjust_queue_depth(sdev
, MSG_SIMPLE_TAG
, depth
);
1185 * ata_scsi_slave_config - Set SCSI device attributes
1186 * @sdev: SCSI device to examine
1188 * This is called before we actually start reading
1189 * and writing to the device, to configure certain
1190 * SCSI mid-layer behaviors.
1193 * Defined by SCSI layer. We don't really care.
1196 int ata_scsi_slave_config(struct scsi_device
*sdev
)
1198 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1199 struct ata_device
*dev
= __ata_scsi_find_dev(ap
, sdev
);
1202 ata_scsi_sdev_config(sdev
);
1205 rc
= ata_scsi_dev_config(sdev
, dev
);
1211 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1212 * @sdev: SCSI device to be destroyed
1214 * @sdev is about to be destroyed for hot/warm unplugging. If
1215 * this unplugging was initiated by libata as indicated by NULL
1216 * dev->sdev, this function doesn't have to do anything.
1217 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1218 * Clear dev->sdev, schedule the device for ATA detach and invoke
1222 * Defined by SCSI layer. We don't really care.
1224 void ata_scsi_slave_destroy(struct scsi_device
*sdev
)
1226 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1227 struct request_queue
*q
= sdev
->request_queue
;
1228 unsigned long flags
;
1229 struct ata_device
*dev
;
1231 if (!ap
->ops
->error_handler
)
1234 spin_lock_irqsave(ap
->lock
, flags
);
1235 dev
= __ata_scsi_find_dev(ap
, sdev
);
1236 if (dev
&& dev
->sdev
) {
1237 /* SCSI device already in CANCEL state, no need to offline it */
1239 dev
->flags
|= ATA_DFLAG_DETACH
;
1240 ata_port_schedule_eh(ap
);
1242 spin_unlock_irqrestore(ap
->lock
, flags
);
1244 kfree(q
->dma_drain_buffer
);
1245 q
->dma_drain_buffer
= NULL
;
1246 q
->dma_drain_size
= 0;
1250 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1251 * @sdev: SCSI device to configure queue depth for
1252 * @queue_depth: new queue depth
1253 * @reason: calling context
1255 * This is libata standard hostt->change_queue_depth callback.
1256 * SCSI will call into this callback when user tries to set queue
1260 * SCSI layer (we don't care)
1263 * Newly configured queue depth.
1265 int ata_scsi_change_queue_depth(struct scsi_device
*sdev
, int queue_depth
,
1268 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1269 struct ata_device
*dev
;
1270 unsigned long flags
;
1272 if (reason
!= SCSI_QDEPTH_DEFAULT
)
1275 if (queue_depth
< 1 || queue_depth
== sdev
->queue_depth
)
1276 return sdev
->queue_depth
;
1278 dev
= ata_scsi_find_dev(ap
, sdev
);
1279 if (!dev
|| !ata_dev_enabled(dev
))
1280 return sdev
->queue_depth
;
1283 spin_lock_irqsave(ap
->lock
, flags
);
1284 dev
->flags
&= ~ATA_DFLAG_NCQ_OFF
;
1285 if (queue_depth
== 1 || !ata_ncq_enabled(dev
)) {
1286 dev
->flags
|= ATA_DFLAG_NCQ_OFF
;
1289 spin_unlock_irqrestore(ap
->lock
, flags
);
1291 /* limit and apply queue depth */
1292 queue_depth
= min(queue_depth
, sdev
->host
->can_queue
);
1293 queue_depth
= min(queue_depth
, ata_id_queue_depth(dev
->id
));
1294 queue_depth
= min(queue_depth
, ATA_MAX_QUEUE
- 1);
1296 if (sdev
->queue_depth
== queue_depth
)
1299 scsi_adjust_queue_depth(sdev
, MSG_SIMPLE_TAG
, queue_depth
);
1304 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1305 * @qc: Storage for translated ATA taskfile
1307 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1308 * (to start). Perhaps these commands should be preceded by
1309 * CHECK POWER MODE to see what power mode the device is already in.
1310 * [See SAT revision 5 at www.t10.org]
1313 * spin_lock_irqsave(host lock)
1316 * Zero on success, non-zero on error.
1318 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd
*qc
)
1320 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1321 struct ata_taskfile
*tf
= &qc
->tf
;
1322 const u8
*cdb
= scmd
->cmnd
;
1324 if (scmd
->cmd_len
< 5)
1327 tf
->flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1328 tf
->protocol
= ATA_PROT_NODATA
;
1330 ; /* ignore IMMED bit, violates sat-r05 */
1333 goto invalid_fld
; /* LOEJ bit set not supported */
1334 if (((cdb
[4] >> 4) & 0xf) != 0)
1335 goto invalid_fld
; /* power conditions not supported */
1338 tf
->nsect
= 1; /* 1 sector, lba=0 */
1340 if (qc
->dev
->flags
& ATA_DFLAG_LBA
) {
1341 tf
->flags
|= ATA_TFLAG_LBA
;
1346 tf
->device
|= ATA_LBA
;
1349 tf
->lbal
= 0x1; /* sect */
1350 tf
->lbam
= 0x0; /* cyl low */
1351 tf
->lbah
= 0x0; /* cyl high */
1354 tf
->command
= ATA_CMD_VERIFY
; /* READ VERIFY */
1356 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1357 * or S5) causing some drives to spin up and down again.
1359 if ((qc
->ap
->flags
& ATA_FLAG_NO_POWEROFF_SPINDOWN
) &&
1360 system_state
== SYSTEM_POWER_OFF
)
1363 if ((qc
->ap
->flags
& ATA_FLAG_NO_HIBERNATE_SPINDOWN
) &&
1364 system_entering_hibernation())
1367 /* Issue ATA STANDBY IMMEDIATE command */
1368 tf
->command
= ATA_CMD_STANDBYNOW1
;
1372 * Standby and Idle condition timers could be implemented but that
1373 * would require libata to implement the Power condition mode page
1374 * and allow the user to change it. Changing mode pages requires
1375 * MODE SELECT to be implemented.
1381 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1382 /* "Invalid field in cbd" */
1385 scmd
->result
= SAM_STAT_GOOD
;
1391 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1392 * @qc: Storage for translated ATA taskfile
1394 * Sets up an ATA taskfile to issue FLUSH CACHE or
1398 * spin_lock_irqsave(host lock)
1401 * Zero on success, non-zero on error.
1403 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd
*qc
)
1405 struct ata_taskfile
*tf
= &qc
->tf
;
1407 tf
->flags
|= ATA_TFLAG_DEVICE
;
1408 tf
->protocol
= ATA_PROT_NODATA
;
1410 if (qc
->dev
->flags
& ATA_DFLAG_FLUSH_EXT
)
1411 tf
->command
= ATA_CMD_FLUSH_EXT
;
1413 tf
->command
= ATA_CMD_FLUSH
;
1415 /* flush is critical for IO integrity, consider it an IO command */
1416 qc
->flags
|= ATA_QCFLAG_IO
;
1422 * scsi_6_lba_len - Get LBA and transfer length
1423 * @cdb: SCSI command to translate
1425 * Calculate LBA and transfer length for 6-byte commands.
1429 * @plen: the transfer length
1431 static void scsi_6_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1436 VPRINTK("six-byte command\n");
1438 lba
|= ((u64
)(cdb
[1] & 0x1f)) << 16;
1439 lba
|= ((u64
)cdb
[2]) << 8;
1440 lba
|= ((u64
)cdb
[3]);
1449 * scsi_10_lba_len - Get LBA and transfer length
1450 * @cdb: SCSI command to translate
1452 * Calculate LBA and transfer length for 10-byte commands.
1456 * @plen: the transfer length
1458 static void scsi_10_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1463 VPRINTK("ten-byte command\n");
1465 lba
|= ((u64
)cdb
[2]) << 24;
1466 lba
|= ((u64
)cdb
[3]) << 16;
1467 lba
|= ((u64
)cdb
[4]) << 8;
1468 lba
|= ((u64
)cdb
[5]);
1470 len
|= ((u32
)cdb
[7]) << 8;
1471 len
|= ((u32
)cdb
[8]);
1478 * scsi_16_lba_len - Get LBA and transfer length
1479 * @cdb: SCSI command to translate
1481 * Calculate LBA and transfer length for 16-byte commands.
1485 * @plen: the transfer length
1487 static void scsi_16_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1492 VPRINTK("sixteen-byte command\n");
1494 lba
|= ((u64
)cdb
[2]) << 56;
1495 lba
|= ((u64
)cdb
[3]) << 48;
1496 lba
|= ((u64
)cdb
[4]) << 40;
1497 lba
|= ((u64
)cdb
[5]) << 32;
1498 lba
|= ((u64
)cdb
[6]) << 24;
1499 lba
|= ((u64
)cdb
[7]) << 16;
1500 lba
|= ((u64
)cdb
[8]) << 8;
1501 lba
|= ((u64
)cdb
[9]);
1503 len
|= ((u32
)cdb
[10]) << 24;
1504 len
|= ((u32
)cdb
[11]) << 16;
1505 len
|= ((u32
)cdb
[12]) << 8;
1506 len
|= ((u32
)cdb
[13]);
1513 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1514 * @qc: Storage for translated ATA taskfile
1516 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1519 * spin_lock_irqsave(host lock)
1522 * Zero on success, non-zero on error.
1524 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd
*qc
)
1526 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1527 struct ata_taskfile
*tf
= &qc
->tf
;
1528 struct ata_device
*dev
= qc
->dev
;
1529 u64 dev_sectors
= qc
->dev
->n_sectors
;
1530 const u8
*cdb
= scmd
->cmnd
;
1534 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1535 tf
->protocol
= ATA_PROT_NODATA
;
1537 if (cdb
[0] == VERIFY
) {
1538 if (scmd
->cmd_len
< 10)
1540 scsi_10_lba_len(cdb
, &block
, &n_block
);
1541 } else if (cdb
[0] == VERIFY_16
) {
1542 if (scmd
->cmd_len
< 16)
1544 scsi_16_lba_len(cdb
, &block
, &n_block
);
1550 if (block
>= dev_sectors
)
1552 if ((block
+ n_block
) > dev_sectors
)
1555 if (dev
->flags
& ATA_DFLAG_LBA
) {
1556 tf
->flags
|= ATA_TFLAG_LBA
;
1558 if (lba_28_ok(block
, n_block
)) {
1560 tf
->command
= ATA_CMD_VERIFY
;
1561 tf
->device
|= (block
>> 24) & 0xf;
1562 } else if (lba_48_ok(block
, n_block
)) {
1563 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
1567 tf
->flags
|= ATA_TFLAG_LBA48
;
1568 tf
->command
= ATA_CMD_VERIFY_EXT
;
1570 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
1572 tf
->hob_lbah
= (block
>> 40) & 0xff;
1573 tf
->hob_lbam
= (block
>> 32) & 0xff;
1574 tf
->hob_lbal
= (block
>> 24) & 0xff;
1576 /* request too large even for LBA48 */
1579 tf
->nsect
= n_block
& 0xff;
1581 tf
->lbah
= (block
>> 16) & 0xff;
1582 tf
->lbam
= (block
>> 8) & 0xff;
1583 tf
->lbal
= block
& 0xff;
1585 tf
->device
|= ATA_LBA
;
1588 u32 sect
, head
, cyl
, track
;
1590 if (!lba_28_ok(block
, n_block
))
1593 /* Convert LBA to CHS */
1594 track
= (u32
)block
/ dev
->sectors
;
1595 cyl
= track
/ dev
->heads
;
1596 head
= track
% dev
->heads
;
1597 sect
= (u32
)block
% dev
->sectors
+ 1;
1599 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1600 (u32
)block
, track
, cyl
, head
, sect
);
1602 /* Check whether the converted CHS can fit.
1606 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
1609 tf
->command
= ATA_CMD_VERIFY
;
1610 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
1613 tf
->lbah
= cyl
>> 8;
1620 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1621 /* "Invalid field in cbd" */
1625 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1626 /* "Logical Block Address out of range" */
1630 scmd
->result
= SAM_STAT_GOOD
;
1635 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1636 * @qc: Storage for translated ATA taskfile
1638 * Converts any of six SCSI read/write commands into the
1639 * ATA counterpart, including starting sector (LBA),
1640 * sector count, and taking into account the device's LBA48
1643 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1644 * %WRITE_16 are currently supported.
1647 * spin_lock_irqsave(host lock)
1650 * Zero on success, non-zero on error.
1652 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd
*qc
)
1654 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1655 const u8
*cdb
= scmd
->cmnd
;
1656 unsigned int tf_flags
= 0;
1661 if (cdb
[0] == WRITE_10
|| cdb
[0] == WRITE_6
|| cdb
[0] == WRITE_16
)
1662 tf_flags
|= ATA_TFLAG_WRITE
;
1664 /* Calculate the SCSI LBA, transfer length and FUA. */
1668 if (unlikely(scmd
->cmd_len
< 10))
1670 scsi_10_lba_len(cdb
, &block
, &n_block
);
1671 if (unlikely(cdb
[1] & (1 << 3)))
1672 tf_flags
|= ATA_TFLAG_FUA
;
1676 if (unlikely(scmd
->cmd_len
< 6))
1678 scsi_6_lba_len(cdb
, &block
, &n_block
);
1680 /* for 6-byte r/w commands, transfer length 0
1681 * means 256 blocks of data, not 0 block.
1688 if (unlikely(scmd
->cmd_len
< 16))
1690 scsi_16_lba_len(cdb
, &block
, &n_block
);
1691 if (unlikely(cdb
[1] & (1 << 3)))
1692 tf_flags
|= ATA_TFLAG_FUA
;
1695 DPRINTK("no-byte command\n");
1699 /* Check and compose ATA command */
1701 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1702 * length 0 means transfer 0 block of data.
1703 * However, for ATA R/W commands, sector count 0 means
1704 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1706 * WARNING: one or two older ATA drives treat 0 as 0...
1710 qc
->flags
|= ATA_QCFLAG_IO
;
1711 qc
->nbytes
= n_block
* ATA_SECT_SIZE
;
1713 rc
= ata_build_rw_tf(&qc
->tf
, qc
->dev
, block
, n_block
, tf_flags
,
1715 if (likely(rc
== 0))
1720 /* treat all other errors as -EINVAL, fall through */
1722 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1723 /* "Invalid field in cbd" */
1727 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1728 /* "Logical Block Address out of range" */
1732 scmd
->result
= SAM_STAT_GOOD
;
1736 static void ata_scsi_qc_complete(struct ata_queued_cmd
*qc
)
1738 struct ata_port
*ap
= qc
->ap
;
1739 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1740 u8
*cdb
= cmd
->cmnd
;
1741 int need_sense
= (qc
->err_mask
!= 0);
1743 /* For ATA pass thru (SAT) commands, generate a sense block if
1744 * user mandated it or if there's an error. Note that if we
1745 * generate because the user forced us to, a check condition
1746 * is generated and the ATA register values are returned
1747 * whether the command completed successfully or not. If there
1748 * was no error, SK, ASC and ASCQ will all be zero.
1750 if (((cdb
[0] == ATA_16
) || (cdb
[0] == ATA_12
)) &&
1751 ((cdb
[2] & 0x20) || need_sense
)) {
1752 ata_gen_passthru_sense(qc
);
1755 cmd
->result
= SAM_STAT_GOOD
;
1757 /* TODO: decide which descriptor format to use
1758 * for 48b LBA devices and call that here
1759 * instead of the fixed desc, which is only
1760 * good for smaller LBA (and maybe CHS?)
1763 ata_gen_ata_sense(qc
);
1767 if (need_sense
&& !ap
->ops
->error_handler
)
1768 ata_dump_status(ap
->print_id
, &qc
->result_tf
);
1776 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1777 * @dev: ATA device to which the command is addressed
1778 * @cmd: SCSI command to execute
1779 * @done: SCSI command completion function
1780 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1782 * Our ->queuecommand() function has decided that the SCSI
1783 * command issued can be directly translated into an ATA
1784 * command, rather than handled internally.
1786 * This function sets up an ata_queued_cmd structure for the
1787 * SCSI command, and sends that ata_queued_cmd to the hardware.
1789 * The xlat_func argument (actor) returns 0 if ready to execute
1790 * ATA command, else 1 to finish translation. If 1 is returned
1791 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1792 * to be set reflecting an error condition or clean (early)
1796 * spin_lock_irqsave(host lock)
1799 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1800 * needs to be deferred.
1802 static int ata_scsi_translate(struct ata_device
*dev
, struct scsi_cmnd
*cmd
,
1803 void (*done
)(struct scsi_cmnd
*),
1804 ata_xlat_func_t xlat_func
)
1806 struct ata_port
*ap
= dev
->link
->ap
;
1807 struct ata_queued_cmd
*qc
;
1812 qc
= ata_scsi_qc_new(dev
, cmd
, done
);
1816 /* data is present; dma-map it */
1817 if (cmd
->sc_data_direction
== DMA_FROM_DEVICE
||
1818 cmd
->sc_data_direction
== DMA_TO_DEVICE
) {
1819 if (unlikely(scsi_bufflen(cmd
) < 1)) {
1820 ata_dev_printk(dev
, KERN_WARNING
,
1821 "WARNING: zero len r/w req\n");
1825 ata_sg_init(qc
, scsi_sglist(cmd
), scsi_sg_count(cmd
));
1827 qc
->dma_dir
= cmd
->sc_data_direction
;
1830 qc
->complete_fn
= ata_scsi_qc_complete
;
1835 if (ap
->ops
->qc_defer
) {
1836 if ((rc
= ap
->ops
->qc_defer(qc
)))
1840 /* select device, send command to hardware */
1849 DPRINTK("EXIT - early finish (good or error)\n");
1854 cmd
->result
= (DID_ERROR
<< 16);
1857 DPRINTK("EXIT - internal\n");
1862 DPRINTK("EXIT - defer\n");
1863 if (rc
== ATA_DEFER_LINK
)
1864 return SCSI_MLQUEUE_DEVICE_BUSY
;
1866 return SCSI_MLQUEUE_HOST_BUSY
;
1870 * ata_scsi_rbuf_get - Map response buffer.
1871 * @cmd: SCSI command containing buffer to be mapped.
1872 * @flags: unsigned long variable to store irq enable status
1873 * @copy_in: copy in from user buffer
1875 * Prepare buffer for simulated SCSI commands.
1878 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
1881 * Pointer to response buffer.
1883 static void *ata_scsi_rbuf_get(struct scsi_cmnd
*cmd
, bool copy_in
,
1884 unsigned long *flags
)
1886 spin_lock_irqsave(&ata_scsi_rbuf_lock
, *flags
);
1888 memset(ata_scsi_rbuf
, 0, ATA_SCSI_RBUF_SIZE
);
1890 sg_copy_to_buffer(scsi_sglist(cmd
), scsi_sg_count(cmd
),
1891 ata_scsi_rbuf
, ATA_SCSI_RBUF_SIZE
);
1892 return ata_scsi_rbuf
;
1896 * ata_scsi_rbuf_put - Unmap response buffer.
1897 * @cmd: SCSI command containing buffer to be unmapped.
1898 * @copy_out: copy out result
1899 * @flags: @flags passed to ata_scsi_rbuf_get()
1901 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1902 * @copy_back is true.
1905 * Unlocks ata_scsi_rbuf_lock.
1907 static inline void ata_scsi_rbuf_put(struct scsi_cmnd
*cmd
, bool copy_out
,
1908 unsigned long *flags
)
1911 sg_copy_from_buffer(scsi_sglist(cmd
), scsi_sg_count(cmd
),
1912 ata_scsi_rbuf
, ATA_SCSI_RBUF_SIZE
);
1913 spin_unlock_irqrestore(&ata_scsi_rbuf_lock
, *flags
);
1917 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1918 * @args: device IDENTIFY data / SCSI command of interest.
1919 * @actor: Callback hook for desired SCSI command simulator
1921 * Takes care of the hard work of simulating a SCSI command...
1922 * Mapping the response buffer, calling the command's handler,
1923 * and handling the handler's return value. This return value
1924 * indicates whether the handler wishes the SCSI command to be
1925 * completed successfully (0), or not (in which case cmd->result
1926 * and sense buffer are assumed to be set).
1929 * spin_lock_irqsave(host lock)
1931 static void ata_scsi_rbuf_fill(struct ata_scsi_args
*args
,
1932 unsigned int (*actor
)(struct ata_scsi_args
*args
, u8
*rbuf
))
1936 struct scsi_cmnd
*cmd
= args
->cmd
;
1937 unsigned long flags
;
1939 rbuf
= ata_scsi_rbuf_get(cmd
, false, &flags
);
1940 rc
= actor(args
, rbuf
);
1941 ata_scsi_rbuf_put(cmd
, rc
== 0, &flags
);
1944 cmd
->result
= SAM_STAT_GOOD
;
1949 * ata_scsiop_inq_std - Simulate INQUIRY command
1950 * @args: device IDENTIFY data / SCSI command of interest.
1951 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1953 * Returns standard device identification data associated
1954 * with non-VPD INQUIRY command output.
1957 * spin_lock_irqsave(host lock)
1959 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args
*args
, u8
*rbuf
)
1961 const u8 versions
[] = {
1962 0x60, /* SAM-3 (no version claimed) */
1965 0x20, /* SBC-2 (no version claimed) */
1968 0x60 /* SPC-3 (no version claimed) */
1973 0x5, /* claim SPC-3 version compatibility */
1980 /* set scsi removeable (RMB) bit per ata bit */
1981 if (ata_id_removeable(args
->id
))
1984 memcpy(rbuf
, hdr
, sizeof(hdr
));
1985 memcpy(&rbuf
[8], "ATA ", 8);
1986 ata_id_string(args
->id
, &rbuf
[16], ATA_ID_PROD
, 16);
1987 ata_id_string(args
->id
, &rbuf
[32], ATA_ID_FW_REV
, 4);
1989 if (rbuf
[32] == 0 || rbuf
[32] == ' ')
1990 memcpy(&rbuf
[32], "n/a ", 4);
1992 memcpy(rbuf
+ 59, versions
, sizeof(versions
));
1998 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1999 * @args: device IDENTIFY data / SCSI command of interest.
2000 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2002 * Returns list of inquiry VPD pages available.
2005 * spin_lock_irqsave(host lock)
2007 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args
*args
, u8
*rbuf
)
2009 const u8 pages
[] = {
2010 0x00, /* page 0x00, this page */
2011 0x80, /* page 0x80, unit serial no page */
2012 0x83, /* page 0x83, device ident page */
2013 0x89, /* page 0x89, ata info page */
2014 0xb0, /* page 0xb0, block limits page */
2015 0xb1, /* page 0xb1, block device characteristics page */
2018 rbuf
[3] = sizeof(pages
); /* number of supported VPD pages */
2019 memcpy(rbuf
+ 4, pages
, sizeof(pages
));
2024 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
2025 * @args: device IDENTIFY data / SCSI command of interest.
2026 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2028 * Returns ATA device serial number.
2031 * spin_lock_irqsave(host lock)
2033 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args
*args
, u8
*rbuf
)
2037 0x80, /* this page code */
2039 ATA_ID_SERNO_LEN
, /* page len */
2042 memcpy(rbuf
, hdr
, sizeof(hdr
));
2043 ata_id_string(args
->id
, (unsigned char *) &rbuf
[4],
2044 ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
2049 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
2050 * @args: device IDENTIFY data / SCSI command of interest.
2051 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2053 * Yields two logical unit device identification designators:
2054 * - vendor specific ASCII containing the ATA serial number
2055 * - SAT defined "t10 vendor id based" containing ASCII vendor
2056 * name ("ATA "), model and serial numbers.
2059 * spin_lock_irqsave(host lock)
2061 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args
*args
, u8
*rbuf
)
2063 const int sat_model_serial_desc_len
= 68;
2066 rbuf
[1] = 0x83; /* this page code */
2069 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2071 rbuf
[num
+ 3] = ATA_ID_SERNO_LEN
;
2073 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
,
2074 ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
2075 num
+= ATA_ID_SERNO_LEN
;
2077 /* SAT defined lu model and serial numbers descriptor */
2078 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2081 rbuf
[num
+ 3] = sat_model_serial_desc_len
;
2083 memcpy(rbuf
+ num
, "ATA ", 8);
2085 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
, ATA_ID_PROD
,
2087 num
+= ATA_ID_PROD_LEN
;
2088 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
, ATA_ID_SERNO
,
2090 num
+= ATA_ID_SERNO_LEN
;
2092 rbuf
[3] = num
- 4; /* page len (assume less than 256 bytes) */
2097 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2098 * @args: device IDENTIFY data / SCSI command of interest.
2099 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2101 * Yields SAT-specified ATA VPD page.
2104 * spin_lock_irqsave(host lock)
2106 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args
*args
, u8
*rbuf
)
2108 struct ata_taskfile tf
;
2110 memset(&tf
, 0, sizeof(tf
));
2112 rbuf
[1] = 0x89; /* our page code */
2113 rbuf
[2] = (0x238 >> 8); /* page size fixed at 238h */
2114 rbuf
[3] = (0x238 & 0xff);
2116 memcpy(&rbuf
[8], "linux ", 8);
2117 memcpy(&rbuf
[16], "libata ", 16);
2118 memcpy(&rbuf
[32], DRV_VERSION
, 4);
2119 ata_id_string(args
->id
, &rbuf
[32], ATA_ID_FW_REV
, 4);
2121 /* we don't store the ATA device signature, so we fake it */
2123 tf
.command
= ATA_DRDY
; /* really, this is Status reg */
2127 ata_tf_to_fis(&tf
, 0, 1, &rbuf
[36]); /* TODO: PMP? */
2128 rbuf
[36] = 0x34; /* force D2H Reg FIS (34h) */
2130 rbuf
[56] = ATA_CMD_ID_ATA
;
2132 memcpy(&rbuf
[60], &args
->id
[0], 512);
2136 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args
*args
, u8
*rbuf
)
2141 rbuf
[3] = 0x3c; /* required VPD size with unmap support */
2144 * Optimal transfer length granularity.
2146 * This is always one physical block, but for disks with a smaller
2147 * logical than physical sector size we need to figure out what the
2150 if (ata_id_has_large_logical_sectors(args
->id
))
2151 min_io_sectors
= ata_id_logical_per_physical_sectors(args
->id
);
2154 put_unaligned_be16(min_io_sectors
, &rbuf
[6]);
2157 * Optimal unmap granularity.
2159 * The ATA spec doesn't even know about a granularity or alignment
2160 * for the TRIM command. We can leave away most of the unmap related
2161 * VPD page entries, but we have specifify a granularity to signal
2162 * that we support some form of unmap - in thise case via WRITE SAME
2163 * with the unmap bit set.
2165 if (ata_id_has_trim(args
->id
)) {
2166 put_unaligned_be32(65535 * 512 / 8, &rbuf
[20]);
2167 put_unaligned_be32(1, &rbuf
[28]);
2173 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args
*args
, u8
*rbuf
)
2175 int form_factor
= ata_id_form_factor(args
->id
);
2176 int media_rotation_rate
= ata_id_rotation_rate(args
->id
);
2180 rbuf
[4] = media_rotation_rate
>> 8;
2181 rbuf
[5] = media_rotation_rate
;
2182 rbuf
[7] = form_factor
;
2188 * ata_scsiop_noop - Command handler that simply returns success.
2189 * @args: device IDENTIFY data / SCSI command of interest.
2190 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2192 * No operation. Simply returns success to caller, to indicate
2193 * that the caller should successfully complete this SCSI command.
2196 * spin_lock_irqsave(host lock)
2198 static unsigned int ata_scsiop_noop(struct ata_scsi_args
*args
, u8
*rbuf
)
2205 * ata_msense_caching - Simulate MODE SENSE caching info page
2206 * @id: device IDENTIFY data
2207 * @buf: output buffer
2209 * Generate a caching info page, which conditionally indicates
2210 * write caching to the SCSI layer, depending on device
2216 static unsigned int ata_msense_caching(u16
*id
, u8
*buf
)
2218 memcpy(buf
, def_cache_mpage
, sizeof(def_cache_mpage
));
2219 if (ata_id_wcache_enabled(id
))
2220 buf
[2] |= (1 << 2); /* write cache enable */
2221 if (!ata_id_rahead_enabled(id
))
2222 buf
[12] |= (1 << 5); /* disable read ahead */
2223 return sizeof(def_cache_mpage
);
2227 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
2228 * @buf: output buffer
2230 * Generate a generic MODE SENSE control mode page.
2235 static unsigned int ata_msense_ctl_mode(u8
*buf
)
2237 memcpy(buf
, def_control_mpage
, sizeof(def_control_mpage
));
2238 return sizeof(def_control_mpage
);
2242 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2243 * @buf: output buffer
2245 * Generate a generic MODE SENSE r/w error recovery page.
2250 static unsigned int ata_msense_rw_recovery(u8
*buf
)
2252 memcpy(buf
, def_rw_recovery_mpage
, sizeof(def_rw_recovery_mpage
));
2253 return sizeof(def_rw_recovery_mpage
);
2257 * We can turn this into a real blacklist if it's needed, for now just
2258 * blacklist any Maxtor BANC1G10 revision firmware
2260 static int ata_dev_supports_fua(u16
*id
)
2262 unsigned char model
[ATA_ID_PROD_LEN
+ 1], fw
[ATA_ID_FW_REV_LEN
+ 1];
2266 if (!ata_id_has_fua(id
))
2269 ata_id_c_string(id
, model
, ATA_ID_PROD
, sizeof(model
));
2270 ata_id_c_string(id
, fw
, ATA_ID_FW_REV
, sizeof(fw
));
2272 if (strcmp(model
, "Maxtor"))
2274 if (strcmp(fw
, "BANC1G10"))
2277 return 0; /* blacklisted */
2281 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2282 * @args: device IDENTIFY data / SCSI command of interest.
2283 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2285 * Simulate MODE SENSE commands. Assume this is invoked for direct
2286 * access devices (e.g. disks) only. There should be no block
2287 * descriptor for other device types.
2290 * spin_lock_irqsave(host lock)
2292 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args
*args
, u8
*rbuf
)
2294 struct ata_device
*dev
= args
->dev
;
2295 u8
*scsicmd
= args
->cmd
->cmnd
, *p
= rbuf
;
2296 const u8 sat_blk_desc
[] = {
2297 0, 0, 0, 0, /* number of blocks: sat unspecified */
2299 0, 0x2, 0x0 /* block length: 512 bytes */
2302 unsigned int ebd
, page_control
, six_byte
;
2307 six_byte
= (scsicmd
[0] == MODE_SENSE
);
2308 ebd
= !(scsicmd
[1] & 0x8); /* dbd bit inverted == edb */
2310 * LLBA bit in msense(10) ignored (compliant)
2313 page_control
= scsicmd
[2] >> 6;
2314 switch (page_control
) {
2315 case 0: /* current */
2316 break; /* supported */
2318 goto saving_not_supp
;
2319 case 1: /* changeable */
2320 case 2: /* defaults */
2326 p
+= 4 + (ebd
? 8 : 0);
2328 p
+= 8 + (ebd
? 8 : 0);
2330 pg
= scsicmd
[2] & 0x3f;
2333 * No mode subpages supported (yet) but asking for _all_
2334 * subpages may be valid
2336 if (spg
&& (spg
!= ALL_SUB_MPAGES
))
2340 case RW_RECOVERY_MPAGE
:
2341 p
+= ata_msense_rw_recovery(p
);
2345 p
+= ata_msense_caching(args
->id
, p
);
2349 p
+= ata_msense_ctl_mode(p
);
2353 p
+= ata_msense_rw_recovery(p
);
2354 p
+= ata_msense_caching(args
->id
, p
);
2355 p
+= ata_msense_ctl_mode(p
);
2358 default: /* invalid page code */
2363 if (ata_dev_supports_fua(args
->id
) && (dev
->flags
& ATA_DFLAG_LBA48
) &&
2364 (!(dev
->flags
& ATA_DFLAG_PIO
) || dev
->multi_count
))
2368 rbuf
[0] = p
- rbuf
- 1;
2371 rbuf
[3] = sizeof(sat_blk_desc
);
2372 memcpy(rbuf
+ 4, sat_blk_desc
, sizeof(sat_blk_desc
));
2375 unsigned int output_len
= p
- rbuf
- 2;
2377 rbuf
[0] = output_len
>> 8;
2378 rbuf
[1] = output_len
;
2381 rbuf
[7] = sizeof(sat_blk_desc
);
2382 memcpy(rbuf
+ 8, sat_blk_desc
, sizeof(sat_blk_desc
));
2388 ata_scsi_set_sense(args
->cmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
2389 /* "Invalid field in cbd" */
2393 ata_scsi_set_sense(args
->cmd
, ILLEGAL_REQUEST
, 0x39, 0x0);
2394 /* "Saving parameters not supported" */
2399 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2400 * @args: device IDENTIFY data / SCSI command of interest.
2401 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2403 * Simulate READ CAPACITY commands.
2408 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args
*args
, u8
*rbuf
)
2410 struct ata_device
*dev
= args
->dev
;
2411 u64 last_lba
= dev
->n_sectors
- 1; /* LBA of the last block */
2412 u8 log_per_phys
= 0;
2413 u16 lowest_aligned
= 0;
2414 u16 word_106
= dev
->id
[106];
2415 u16 word_209
= dev
->id
[209];
2417 if ((word_106
& 0xc000) == 0x4000) {
2418 /* Number and offset of logical sectors per physical sector */
2419 if (word_106
& (1 << 13))
2420 log_per_phys
= word_106
& 0xf;
2421 if ((word_209
& 0xc000) == 0x4000) {
2422 u16 first
= dev
->id
[209] & 0x3fff;
2424 lowest_aligned
= (1 << log_per_phys
) - first
;
2430 if (args
->cmd
->cmnd
[0] == READ_CAPACITY
) {
2431 if (last_lba
>= 0xffffffffULL
)
2432 last_lba
= 0xffffffff;
2434 /* sector count, 32-bit */
2435 rbuf
[0] = last_lba
>> (8 * 3);
2436 rbuf
[1] = last_lba
>> (8 * 2);
2437 rbuf
[2] = last_lba
>> (8 * 1);
2441 rbuf
[6] = ATA_SECT_SIZE
>> 8;
2442 rbuf
[7] = ATA_SECT_SIZE
& 0xff;
2444 /* sector count, 64-bit */
2445 rbuf
[0] = last_lba
>> (8 * 7);
2446 rbuf
[1] = last_lba
>> (8 * 6);
2447 rbuf
[2] = last_lba
>> (8 * 5);
2448 rbuf
[3] = last_lba
>> (8 * 4);
2449 rbuf
[4] = last_lba
>> (8 * 3);
2450 rbuf
[5] = last_lba
>> (8 * 2);
2451 rbuf
[6] = last_lba
>> (8 * 1);
2455 rbuf
[10] = ATA_SECT_SIZE
>> 8;
2456 rbuf
[11] = ATA_SECT_SIZE
& 0xff;
2459 rbuf
[13] = log_per_phys
;
2460 rbuf
[14] = (lowest_aligned
>> 8) & 0x3f;
2461 rbuf
[15] = lowest_aligned
;
2463 if (ata_id_has_trim(args
->id
)) {
2464 rbuf
[14] |= 0x80; /* TPE */
2466 if (ata_id_has_zero_after_trim(args
->id
))
2467 rbuf
[14] |= 0x40; /* TPRZ */
2475 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2476 * @args: device IDENTIFY data / SCSI command of interest.
2477 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2479 * Simulate REPORT LUNS command.
2482 * spin_lock_irqsave(host lock)
2484 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args
*args
, u8
*rbuf
)
2487 rbuf
[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2492 static void atapi_sense_complete(struct ata_queued_cmd
*qc
)
2494 if (qc
->err_mask
&& ((qc
->err_mask
& AC_ERR_DEV
) == 0)) {
2495 /* FIXME: not quite right; we don't want the
2496 * translation of taskfile registers into
2497 * a sense descriptors, since that's only
2498 * correct for ATA, not ATAPI
2500 ata_gen_passthru_sense(qc
);
2503 qc
->scsidone(qc
->scsicmd
);
2507 /* is it pointless to prefer PIO for "safety reasons"? */
2508 static inline int ata_pio_use_silly(struct ata_port
*ap
)
2510 return (ap
->flags
& ATA_FLAG_PIO_DMA
);
2513 static void atapi_request_sense(struct ata_queued_cmd
*qc
)
2515 struct ata_port
*ap
= qc
->ap
;
2516 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2518 DPRINTK("ATAPI request sense\n");
2520 /* FIXME: is this needed? */
2521 memset(cmd
->sense_buffer
, 0, SCSI_SENSE_BUFFERSIZE
);
2523 #ifdef CONFIG_ATA_SFF
2524 if (ap
->ops
->sff_tf_read
)
2525 ap
->ops
->sff_tf_read(ap
, &qc
->tf
);
2528 /* fill these in, for the case where they are -not- overwritten */
2529 cmd
->sense_buffer
[0] = 0x70;
2530 cmd
->sense_buffer
[2] = qc
->tf
.feature
>> 4;
2534 /* setup sg table and init transfer direction */
2535 sg_init_one(&qc
->sgent
, cmd
->sense_buffer
, SCSI_SENSE_BUFFERSIZE
);
2536 ata_sg_init(qc
, &qc
->sgent
, 1);
2537 qc
->dma_dir
= DMA_FROM_DEVICE
;
2539 memset(&qc
->cdb
, 0, qc
->dev
->cdb_len
);
2540 qc
->cdb
[0] = REQUEST_SENSE
;
2541 qc
->cdb
[4] = SCSI_SENSE_BUFFERSIZE
;
2543 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2544 qc
->tf
.command
= ATA_CMD_PACKET
;
2546 if (ata_pio_use_silly(ap
)) {
2547 qc
->tf
.protocol
= ATAPI_PROT_DMA
;
2548 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
2550 qc
->tf
.protocol
= ATAPI_PROT_PIO
;
2551 qc
->tf
.lbam
= SCSI_SENSE_BUFFERSIZE
;
2554 qc
->nbytes
= SCSI_SENSE_BUFFERSIZE
;
2556 qc
->complete_fn
= atapi_sense_complete
;
2563 static void atapi_qc_complete(struct ata_queued_cmd
*qc
)
2565 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2566 unsigned int err_mask
= qc
->err_mask
;
2568 VPRINTK("ENTER, err_mask 0x%X\n", err_mask
);
2570 /* handle completion from new EH */
2571 if (unlikely(qc
->ap
->ops
->error_handler
&&
2572 (err_mask
|| qc
->flags
& ATA_QCFLAG_SENSE_VALID
))) {
2574 if (!(qc
->flags
& ATA_QCFLAG_SENSE_VALID
)) {
2575 /* FIXME: not quite right; we don't want the
2576 * translation of taskfile registers into a
2577 * sense descriptors, since that's only
2578 * correct for ATA, not ATAPI
2580 ata_gen_passthru_sense(qc
);
2583 /* SCSI EH automatically locks door if sdev->locked is
2584 * set. Sometimes door lock request continues to
2585 * fail, for example, when no media is present. This
2586 * creates a loop - SCSI EH issues door lock which
2587 * fails and gets invoked again to acquire sense data
2588 * for the failed command.
2590 * If door lock fails, always clear sdev->locked to
2591 * avoid this infinite loop.
2593 * This may happen before SCSI scan is complete. Make
2594 * sure qc->dev->sdev isn't NULL before dereferencing.
2596 if (qc
->cdb
[0] == ALLOW_MEDIUM_REMOVAL
&& qc
->dev
->sdev
)
2597 qc
->dev
->sdev
->locked
= 0;
2599 qc
->scsicmd
->result
= SAM_STAT_CHECK_CONDITION
;
2605 /* successful completion or old EH failure path */
2606 if (unlikely(err_mask
& AC_ERR_DEV
)) {
2607 cmd
->result
= SAM_STAT_CHECK_CONDITION
;
2608 atapi_request_sense(qc
);
2610 } else if (unlikely(err_mask
)) {
2611 /* FIXME: not quite right; we don't want the
2612 * translation of taskfile registers into
2613 * a sense descriptors, since that's only
2614 * correct for ATA, not ATAPI
2616 ata_gen_passthru_sense(qc
);
2618 u8
*scsicmd
= cmd
->cmnd
;
2620 if ((scsicmd
[0] == INQUIRY
) && ((scsicmd
[1] & 0x03) == 0)) {
2621 unsigned long flags
;
2624 buf
= ata_scsi_rbuf_get(cmd
, true, &flags
);
2626 /* ATAPI devices typically report zero for their SCSI version,
2627 * and sometimes deviate from the spec WRT response data
2628 * format. If SCSI version is reported as zero like normal,
2629 * then we make the following fixups: 1) Fake MMC-5 version,
2630 * to indicate to the Linux scsi midlayer this is a modern
2631 * device. 2) Ensure response data format / ATAPI information
2632 * are always correct.
2639 ata_scsi_rbuf_put(cmd
, true, &flags
);
2642 cmd
->result
= SAM_STAT_GOOD
;
2649 * atapi_xlat - Initialize PACKET taskfile
2650 * @qc: command structure to be initialized
2653 * spin_lock_irqsave(host lock)
2656 * Zero on success, non-zero on failure.
2658 static unsigned int atapi_xlat(struct ata_queued_cmd
*qc
)
2660 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
2661 struct ata_device
*dev
= qc
->dev
;
2662 int nodata
= (scmd
->sc_data_direction
== DMA_NONE
);
2663 int using_pio
= !nodata
&& (dev
->flags
& ATA_DFLAG_PIO
);
2664 unsigned int nbytes
;
2666 memset(qc
->cdb
, 0, dev
->cdb_len
);
2667 memcpy(qc
->cdb
, scmd
->cmnd
, scmd
->cmd_len
);
2669 qc
->complete_fn
= atapi_qc_complete
;
2671 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2672 if (scmd
->sc_data_direction
== DMA_TO_DEVICE
) {
2673 qc
->tf
.flags
|= ATA_TFLAG_WRITE
;
2674 DPRINTK("direction: write\n");
2677 qc
->tf
.command
= ATA_CMD_PACKET
;
2678 ata_qc_set_pc_nbytes(qc
);
2680 /* check whether ATAPI DMA is safe */
2681 if (!nodata
&& !using_pio
&& atapi_check_dma(qc
))
2684 /* Some controller variants snoop this value for Packet
2685 * transfers to do state machine and FIFO management. Thus we
2686 * want to set it properly, and for DMA where it is
2687 * effectively meaningless.
2689 nbytes
= min(ata_qc_raw_nbytes(qc
), (unsigned int)63 * 1024);
2691 /* Most ATAPI devices which honor transfer chunk size don't
2692 * behave according to the spec when odd chunk size which
2693 * matches the transfer length is specified. If the number of
2694 * bytes to transfer is 2n+1. According to the spec, what
2695 * should happen is to indicate that 2n+1 is going to be
2696 * transferred and transfer 2n+2 bytes where the last byte is
2699 * In practice, this doesn't happen. ATAPI devices first
2700 * indicate and transfer 2n bytes and then indicate and
2701 * transfer 2 bytes where the last byte is padding.
2703 * This inconsistency confuses several controllers which
2704 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2705 * These controllers use actual number of transferred bytes to
2706 * update DMA poitner and transfer of 4n+2 bytes make those
2707 * controller push DMA pointer by 4n+4 bytes because SATA data
2708 * FISes are aligned to 4 bytes. This causes data corruption
2709 * and buffer overrun.
2711 * Always setting nbytes to even number solves this problem
2712 * because then ATAPI devices don't have to split data at 2n
2718 qc
->tf
.lbam
= (nbytes
& 0xFF);
2719 qc
->tf
.lbah
= (nbytes
>> 8);
2722 qc
->tf
.protocol
= ATAPI_PROT_NODATA
;
2724 qc
->tf
.protocol
= ATAPI_PROT_PIO
;
2727 qc
->tf
.protocol
= ATAPI_PROT_DMA
;
2728 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
2730 if ((dev
->flags
& ATA_DFLAG_DMADIR
) &&
2731 (scmd
->sc_data_direction
!= DMA_TO_DEVICE
))
2732 /* some SATA bridges need us to indicate data xfer direction */
2733 qc
->tf
.feature
|= ATAPI_DMADIR
;
2737 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2738 as ATAPI tape drives don't get this right otherwise */
2742 static struct ata_device
*ata_find_dev(struct ata_port
*ap
, int devno
)
2744 if (!sata_pmp_attached(ap
)) {
2745 if (likely(devno
< ata_link_max_devices(&ap
->link
)))
2746 return &ap
->link
.device
[devno
];
2748 if (likely(devno
< ap
->nr_pmp_links
))
2749 return &ap
->pmp_link
[devno
].device
[0];
2755 static struct ata_device
*__ata_scsi_find_dev(struct ata_port
*ap
,
2756 const struct scsi_device
*scsidev
)
2760 /* skip commands not addressed to targets we simulate */
2761 if (!sata_pmp_attached(ap
)) {
2762 if (unlikely(scsidev
->channel
|| scsidev
->lun
))
2764 devno
= scsidev
->id
;
2766 if (unlikely(scsidev
->id
|| scsidev
->lun
))
2768 devno
= scsidev
->channel
;
2771 return ata_find_dev(ap
, devno
);
2775 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2776 * @ap: ATA port to which the device is attached
2777 * @scsidev: SCSI device from which we derive the ATA device
2779 * Given various information provided in struct scsi_cmnd,
2780 * map that onto an ATA bus, and using that mapping
2781 * determine which ata_device is associated with the
2782 * SCSI command to be sent.
2785 * spin_lock_irqsave(host lock)
2788 * Associated ATA device, or %NULL if not found.
2790 static struct ata_device
*
2791 ata_scsi_find_dev(struct ata_port
*ap
, const struct scsi_device
*scsidev
)
2793 struct ata_device
*dev
= __ata_scsi_find_dev(ap
, scsidev
);
2795 if (unlikely(!dev
|| !ata_dev_enabled(dev
)))
2802 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2803 * @byte1: Byte 1 from pass-thru CDB.
2806 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2809 ata_scsi_map_proto(u8 byte1
)
2811 switch((byte1
& 0x1e) >> 1) {
2812 case 3: /* Non-data */
2813 return ATA_PROT_NODATA
;
2816 case 10: /* UDMA Data-in */
2817 case 11: /* UDMA Data-Out */
2818 return ATA_PROT_DMA
;
2820 case 4: /* PIO Data-in */
2821 case 5: /* PIO Data-out */
2822 return ATA_PROT_PIO
;
2824 case 0: /* Hard Reset */
2826 case 8: /* Device Diagnostic */
2827 case 9: /* Device Reset */
2828 case 7: /* DMA Queued */
2829 case 12: /* FPDMA */
2830 case 15: /* Return Response Info */
2831 default: /* Reserved */
2835 return ATA_PROT_UNKNOWN
;
2839 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2840 * @qc: command structure to be initialized
2842 * Handles either 12 or 16-byte versions of the CDB.
2845 * Zero on success, non-zero on failure.
2847 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd
*qc
)
2849 struct ata_taskfile
*tf
= &(qc
->tf
);
2850 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
2851 struct ata_device
*dev
= qc
->dev
;
2852 const u8
*cdb
= scmd
->cmnd
;
2854 if ((tf
->protocol
= ata_scsi_map_proto(cdb
[1])) == ATA_PROT_UNKNOWN
)
2858 * 12 and 16 byte CDBs use different offsets to
2859 * provide the various register values.
2861 if (cdb
[0] == ATA_16
) {
2863 * 16-byte CDB - may contain extended commands.
2865 * If that is the case, copy the upper byte register values.
2867 if (cdb
[1] & 0x01) {
2868 tf
->hob_feature
= cdb
[3];
2869 tf
->hob_nsect
= cdb
[5];
2870 tf
->hob_lbal
= cdb
[7];
2871 tf
->hob_lbam
= cdb
[9];
2872 tf
->hob_lbah
= cdb
[11];
2873 tf
->flags
|= ATA_TFLAG_LBA48
;
2875 tf
->flags
&= ~ATA_TFLAG_LBA48
;
2878 * Always copy low byte, device and command registers.
2880 tf
->feature
= cdb
[4];
2885 tf
->device
= cdb
[13];
2886 tf
->command
= cdb
[14];
2889 * 12-byte CDB - incapable of extended commands.
2891 tf
->flags
&= ~ATA_TFLAG_LBA48
;
2893 tf
->feature
= cdb
[3];
2898 tf
->device
= cdb
[8];
2899 tf
->command
= cdb
[9];
2902 /* enforce correct master/slave bit */
2903 tf
->device
= dev
->devno
?
2904 tf
->device
| ATA_DEV1
: tf
->device
& ~ATA_DEV1
;
2906 /* READ/WRITE LONG use a non-standard sect_size */
2907 qc
->sect_size
= ATA_SECT_SIZE
;
2908 switch (tf
->command
) {
2909 case ATA_CMD_READ_LONG
:
2910 case ATA_CMD_READ_LONG_ONCE
:
2911 case ATA_CMD_WRITE_LONG
:
2912 case ATA_CMD_WRITE_LONG_ONCE
:
2913 if (tf
->protocol
!= ATA_PROT_PIO
|| tf
->nsect
!= 1)
2915 qc
->sect_size
= scsi_bufflen(scmd
);
2919 * Set flags so that all registers will be written, pass on
2920 * write indication (used for PIO/DMA setup), result TF is
2921 * copied back and we don't whine too much about its failure.
2923 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2924 if (scmd
->sc_data_direction
== DMA_TO_DEVICE
)
2925 tf
->flags
|= ATA_TFLAG_WRITE
;
2927 qc
->flags
|= ATA_QCFLAG_RESULT_TF
| ATA_QCFLAG_QUIET
;
2930 * Set transfer length.
2932 * TODO: find out if we need to do more here to
2933 * cover scatter/gather case.
2935 ata_qc_set_pc_nbytes(qc
);
2937 /* We may not issue DMA commands if no DMA mode is set */
2938 if (tf
->protocol
== ATA_PROT_DMA
&& dev
->dma_mode
== 0)
2941 /* sanity check for pio multi commands */
2942 if ((cdb
[1] & 0xe0) && !is_multi_taskfile(tf
))
2945 if (is_multi_taskfile(tf
)) {
2946 unsigned int multi_count
= 1 << (cdb
[1] >> 5);
2948 /* compare the passed through multi_count
2949 * with the cached multi_count of libata
2951 if (multi_count
!= dev
->multi_count
)
2952 ata_dev_printk(dev
, KERN_WARNING
,
2953 "invalid multi_count %u ignored\n",
2958 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2959 * SET_FEATURES - XFER MODE must be preceded/succeeded
2960 * by an update to hardware-specific registers for each
2961 * controller (i.e. the reason for ->set_piomode(),
2962 * ->set_dmamode(), and ->post_set_mode() hooks).
2964 if (tf
->command
== ATA_CMD_SET_FEATURES
&&
2965 tf
->feature
== SETFEATURES_XFER
)
2969 * Filter TPM commands by default. These provide an
2970 * essentially uncontrolled encrypted "back door" between
2971 * applications and the disk. Set libata.allow_tpm=1 if you
2972 * have a real reason for wanting to use them. This ensures
2973 * that installed software cannot easily mess stuff up without
2974 * user intent. DVR type users will probably ship with this enabled
2975 * for movie content management.
2977 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
2978 * for this and should do in future but that it is not sufficient as
2979 * DCS is an optional feature set. Thus we also do the software filter
2980 * so that we comply with the TC consortium stated goal that the user
2981 * can turn off TC features of their system.
2983 if (tf
->command
>= 0x5C && tf
->command
<= 0x5F && !libata_allow_tpm
)
2989 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x00);
2990 /* "Invalid field in cdb" */
2994 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd
*qc
)
2996 struct ata_taskfile
*tf
= &qc
->tf
;
2997 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
2998 struct ata_device
*dev
= qc
->dev
;
2999 const u8
*cdb
= scmd
->cmnd
;
3005 /* we may not issue DMA commands if no DMA mode is set */
3006 if (unlikely(!dev
->dma_mode
))
3009 if (unlikely(scmd
->cmd_len
< 16))
3011 scsi_16_lba_len(cdb
, &block
, &n_block
);
3013 /* for now we only support WRITE SAME with the unmap bit set */
3014 if (unlikely(!(cdb
[1] & 0x8)))
3018 * WRITE SAME always has a sector sized buffer as payload, this
3019 * should never be a multiple entry S/G list.
3021 if (!scsi_sg_count(scmd
))
3024 buf
= page_address(sg_page(scsi_sglist(scmd
)));
3025 size
= ata_set_lba_range_entries(buf
, 512, block
, n_block
);
3027 tf
->protocol
= ATA_PROT_DMA
;
3028 tf
->hob_feature
= 0;
3029 tf
->feature
= ATA_DSM_TRIM
;
3030 tf
->hob_nsect
= (size
/ 512) >> 8;
3031 tf
->nsect
= size
/ 512;
3032 tf
->command
= ATA_CMD_DSM
;
3033 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_LBA48
|
3036 ata_qc_set_pc_nbytes(qc
);
3041 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x00);
3042 /* "Invalid field in cdb" */
3047 * ata_get_xlat_func - check if SCSI to ATA translation is possible
3049 * @cmd: SCSI command opcode to consider
3051 * Look up the SCSI command given, and determine whether the
3052 * SCSI command is to be translated or simulated.
3055 * Pointer to translation function if possible, %NULL if not.
3058 static inline ata_xlat_func_t
ata_get_xlat_func(struct ata_device
*dev
, u8 cmd
)
3068 return ata_scsi_rw_xlat
;
3071 return ata_scsi_write_same_xlat
;
3073 case SYNCHRONIZE_CACHE
:
3074 if (ata_try_flush_cache(dev
))
3075 return ata_scsi_flush_xlat
;
3080 return ata_scsi_verify_xlat
;
3084 return ata_scsi_pass_thru
;
3087 return ata_scsi_start_stop_xlat
;
3094 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
3095 * @ap: ATA port to which the command was being sent
3096 * @cmd: SCSI command to dump
3098 * Prints the contents of a SCSI command via printk().
3101 static inline void ata_scsi_dump_cdb(struct ata_port
*ap
,
3102 struct scsi_cmnd
*cmd
)
3105 struct scsi_device
*scsidev
= cmd
->device
;
3106 u8
*scsicmd
= cmd
->cmnd
;
3108 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
3110 scsidev
->channel
, scsidev
->id
, scsidev
->lun
,
3111 scsicmd
[0], scsicmd
[1], scsicmd
[2], scsicmd
[3],
3112 scsicmd
[4], scsicmd
[5], scsicmd
[6], scsicmd
[7],
3117 static inline int __ata_scsi_queuecmd(struct scsi_cmnd
*scmd
,
3118 void (*done
)(struct scsi_cmnd
*),
3119 struct ata_device
*dev
)
3121 u8 scsi_op
= scmd
->cmnd
[0];
3122 ata_xlat_func_t xlat_func
;
3125 if (dev
->class == ATA_DEV_ATA
) {
3126 if (unlikely(!scmd
->cmd_len
|| scmd
->cmd_len
> dev
->cdb_len
))
3129 xlat_func
= ata_get_xlat_func(dev
, scsi_op
);
3131 if (unlikely(!scmd
->cmd_len
))
3135 if (likely((scsi_op
!= ATA_16
) || !atapi_passthru16
)) {
3136 /* relay SCSI command to ATAPI device */
3137 int len
= COMMAND_SIZE(scsi_op
);
3138 if (unlikely(len
> scmd
->cmd_len
|| len
> dev
->cdb_len
))
3141 xlat_func
= atapi_xlat
;
3143 /* ATA_16 passthru, treat as an ATA command */
3144 if (unlikely(scmd
->cmd_len
> 16))
3147 xlat_func
= ata_get_xlat_func(dev
, scsi_op
);
3152 rc
= ata_scsi_translate(dev
, scmd
, done
, xlat_func
);
3154 ata_scsi_simulate(dev
, scmd
, done
);
3159 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
3160 scmd
->cmd_len
, scsi_op
, dev
->cdb_len
);
3161 scmd
->result
= DID_ERROR
<< 16;
3167 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
3168 * @cmd: SCSI command to be sent
3169 * @done: Completion function, called when command is complete
3171 * In some cases, this function translates SCSI commands into
3172 * ATA taskfiles, and queues the taskfiles to be sent to
3173 * hardware. In other cases, this function simulates a
3174 * SCSI device by evaluating and responding to certain
3175 * SCSI commands. This creates the overall effect of
3176 * ATA and ATAPI devices appearing as SCSI devices.
3179 * Releases scsi-layer-held lock, and obtains host lock.
3182 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3185 int ata_scsi_queuecmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*))
3187 struct ata_port
*ap
;
3188 struct ata_device
*dev
;
3189 struct scsi_device
*scsidev
= cmd
->device
;
3190 struct Scsi_Host
*shost
= scsidev
->host
;
3193 ap
= ata_shost_to_port(shost
);
3195 spin_unlock(shost
->host_lock
);
3196 spin_lock(ap
->lock
);
3198 ata_scsi_dump_cdb(ap
, cmd
);
3200 dev
= ata_scsi_find_dev(ap
, scsidev
);
3202 rc
= __ata_scsi_queuecmd(cmd
, done
, dev
);
3204 cmd
->result
= (DID_BAD_TARGET
<< 16);
3208 spin_unlock(ap
->lock
);
3209 spin_lock(shost
->host_lock
);
3214 * ata_scsi_simulate - simulate SCSI command on ATA device
3215 * @dev: the target device
3216 * @cmd: SCSI command being sent to device.
3217 * @done: SCSI command completion function.
3219 * Interprets and directly executes a select list of SCSI commands
3220 * that can be handled internally.
3223 * spin_lock_irqsave(host lock)
3226 void ata_scsi_simulate(struct ata_device
*dev
, struct scsi_cmnd
*cmd
,
3227 void (*done
)(struct scsi_cmnd
*))
3229 struct ata_scsi_args args
;
3230 const u8
*scsicmd
= cmd
->cmnd
;
3238 switch(scsicmd
[0]) {
3239 /* TODO: worth improving? */
3241 ata_scsi_invalid_field(cmd
, done
);
3245 if (scsicmd
[1] & 2) /* is CmdDt set? */
3246 ata_scsi_invalid_field(cmd
, done
);
3247 else if ((scsicmd
[1] & 1) == 0) /* is EVPD clear? */
3248 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_std
);
3249 else switch (scsicmd
[2]) {
3251 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_00
);
3254 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_80
);
3257 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_83
);
3260 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_89
);
3263 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_b0
);
3266 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_b1
);
3269 ata_scsi_invalid_field(cmd
, done
);
3276 ata_scsi_rbuf_fill(&args
, ata_scsiop_mode_sense
);
3279 case MODE_SELECT
: /* unconditionally return */
3280 case MODE_SELECT_10
: /* bad-field-in-cdb */
3281 ata_scsi_invalid_field(cmd
, done
);
3285 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
3288 case SERVICE_ACTION_IN
:
3289 if ((scsicmd
[1] & 0x1f) == SAI_READ_CAPACITY_16
)
3290 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
3292 ata_scsi_invalid_field(cmd
, done
);
3296 ata_scsi_rbuf_fill(&args
, ata_scsiop_report_luns
);
3300 ata_scsi_set_sense(cmd
, 0, 0, 0);
3301 cmd
->result
= (DRIVER_SENSE
<< 24);
3305 /* if we reach this, then writeback caching is disabled,
3306 * turning this into a no-op.
3308 case SYNCHRONIZE_CACHE
:
3311 /* no-op's, complete with success */
3315 case TEST_UNIT_READY
:
3316 ata_scsi_rbuf_fill(&args
, ata_scsiop_noop
);
3319 case SEND_DIAGNOSTIC
:
3320 tmp8
= scsicmd
[1] & ~(1 << 3);
3321 if ((tmp8
== 0x4) && (!scsicmd
[3]) && (!scsicmd
[4]))
3322 ata_scsi_rbuf_fill(&args
, ata_scsiop_noop
);
3324 ata_scsi_invalid_field(cmd
, done
);
3327 /* all other commands */
3329 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, 0x20, 0x0);
3330 /* "Invalid command operation code" */
3336 int ata_scsi_add_hosts(struct ata_host
*host
, struct scsi_host_template
*sht
)
3340 for (i
= 0; i
< host
->n_ports
; i
++) {
3341 struct ata_port
*ap
= host
->ports
[i
];
3342 struct Scsi_Host
*shost
;
3345 shost
= scsi_host_alloc(sht
, sizeof(struct ata_port
*));
3349 *(struct ata_port
**)&shost
->hostdata
[0] = ap
;
3350 ap
->scsi_host
= shost
;
3352 shost
->transportt
= &ata_scsi_transport_template
;
3353 shost
->unique_id
= ap
->print_id
;
3356 shost
->max_channel
= 1;
3357 shost
->max_cmd_len
= 16;
3359 /* Schedule policy is determined by ->qc_defer()
3360 * callback and it needs to see every deferred qc.
3361 * Set host_blocked to 1 to prevent SCSI midlayer from
3362 * automatically deferring requests.
3364 shost
->max_host_blocked
= 1;
3366 rc
= scsi_add_host(ap
->scsi_host
, ap
->host
->dev
);
3374 scsi_host_put(host
->ports
[i
]->scsi_host
);
3377 struct Scsi_Host
*shost
= host
->ports
[i
]->scsi_host
;
3379 scsi_remove_host(shost
);
3380 scsi_host_put(shost
);
3385 void ata_scsi_scan_host(struct ata_port
*ap
, int sync
)
3388 struct ata_device
*last_failed_dev
= NULL
;
3389 struct ata_link
*link
;
3390 struct ata_device
*dev
;
3393 ata_for_each_link(link
, ap
, EDGE
) {
3394 ata_for_each_dev(dev
, link
, ENABLED
) {
3395 struct scsi_device
*sdev
;
3396 int channel
= 0, id
= 0;
3401 if (ata_is_host_link(link
))
3404 channel
= link
->pmp
;
3406 sdev
= __scsi_add_device(ap
->scsi_host
, channel
, id
, 0,
3408 if (!IS_ERR(sdev
)) {
3410 scsi_device_put(sdev
);
3415 /* If we scanned while EH was in progress or allocation
3416 * failure occurred, scan would have failed silently. Check
3417 * whether all devices are attached.
3419 ata_for_each_link(link
, ap
, EDGE
) {
3420 ata_for_each_dev(dev
, link
, ENABLED
) {
3429 /* we're missing some SCSI devices */
3431 /* If caller requested synchrnous scan && we've made
3432 * any progress, sleep briefly and repeat.
3434 if (dev
!= last_failed_dev
) {
3436 last_failed_dev
= dev
;
3440 /* We might be failing to detect boot device, give it
3441 * a few more chances.
3448 ata_port_printk(ap
, KERN_ERR
, "WARNING: synchronous SCSI scan "
3449 "failed without making any progress,\n"
3450 " switching to async\n");
3453 queue_delayed_work(ata_aux_wq
, &ap
->hotplug_task
,
3454 round_jiffies_relative(HZ
));
3458 * ata_scsi_offline_dev - offline attached SCSI device
3459 * @dev: ATA device to offline attached SCSI device for
3461 * This function is called from ata_eh_hotplug() and responsible
3462 * for taking the SCSI device attached to @dev offline. This
3463 * function is called with host lock which protects dev->sdev
3467 * spin_lock_irqsave(host lock)
3470 * 1 if attached SCSI device exists, 0 otherwise.
3472 int ata_scsi_offline_dev(struct ata_device
*dev
)
3475 scsi_device_set_state(dev
->sdev
, SDEV_OFFLINE
);
3482 * ata_scsi_remove_dev - remove attached SCSI device
3483 * @dev: ATA device to remove attached SCSI device for
3485 * This function is called from ata_eh_scsi_hotplug() and
3486 * responsible for removing the SCSI device attached to @dev.
3489 * Kernel thread context (may sleep).
3491 static void ata_scsi_remove_dev(struct ata_device
*dev
)
3493 struct ata_port
*ap
= dev
->link
->ap
;
3494 struct scsi_device
*sdev
;
3495 unsigned long flags
;
3497 /* Alas, we need to grab scan_mutex to ensure SCSI device
3498 * state doesn't change underneath us and thus
3499 * scsi_device_get() always succeeds. The mutex locking can
3500 * be removed if there is __scsi_device_get() interface which
3501 * increments reference counts regardless of device state.
3503 mutex_lock(&ap
->scsi_host
->scan_mutex
);
3504 spin_lock_irqsave(ap
->lock
, flags
);
3506 /* clearing dev->sdev is protected by host lock */
3511 /* If user initiated unplug races with us, sdev can go
3512 * away underneath us after the host lock and
3513 * scan_mutex are released. Hold onto it.
3515 if (scsi_device_get(sdev
) == 0) {
3516 /* The following ensures the attached sdev is
3517 * offline on return from ata_scsi_offline_dev()
3518 * regardless it wins or loses the race
3519 * against this function.
3521 scsi_device_set_state(sdev
, SDEV_OFFLINE
);
3528 spin_unlock_irqrestore(ap
->lock
, flags
);
3529 mutex_unlock(&ap
->scsi_host
->scan_mutex
);
3532 ata_dev_printk(dev
, KERN_INFO
, "detaching (SCSI %s)\n",
3533 dev_name(&sdev
->sdev_gendev
));
3535 scsi_remove_device(sdev
);
3536 scsi_device_put(sdev
);
3540 static void ata_scsi_handle_link_detach(struct ata_link
*link
)
3542 struct ata_port
*ap
= link
->ap
;
3543 struct ata_device
*dev
;
3545 ata_for_each_dev(dev
, link
, ALL
) {
3546 unsigned long flags
;
3548 if (!(dev
->flags
& ATA_DFLAG_DETACHED
))
3551 spin_lock_irqsave(ap
->lock
, flags
);
3552 dev
->flags
&= ~ATA_DFLAG_DETACHED
;
3553 spin_unlock_irqrestore(ap
->lock
, flags
);
3555 ata_scsi_remove_dev(dev
);
3560 * ata_scsi_media_change_notify - send media change event
3561 * @dev: Pointer to the disk device with media change event
3563 * Tell the block layer to send a media change notification
3567 * spin_lock_irqsave(host lock)
3569 void ata_scsi_media_change_notify(struct ata_device
*dev
)
3572 sdev_evt_send_simple(dev
->sdev
, SDEV_EVT_MEDIA_CHANGE
,
3577 * ata_scsi_hotplug - SCSI part of hotplug
3578 * @work: Pointer to ATA port to perform SCSI hotplug on
3580 * Perform SCSI part of hotplug. It's executed from a separate
3581 * workqueue after EH completes. This is necessary because SCSI
3582 * hot plugging requires working EH and hot unplugging is
3583 * synchronized with hot plugging with a mutex.
3586 * Kernel thread context (may sleep).
3588 void ata_scsi_hotplug(struct work_struct
*work
)
3590 struct ata_port
*ap
=
3591 container_of(work
, struct ata_port
, hotplug_task
.work
);
3594 if (ap
->pflags
& ATA_PFLAG_UNLOADING
) {
3595 DPRINTK("ENTER/EXIT - unloading\n");
3601 /* Unplug detached devices. We cannot use link iterator here
3602 * because PMP links have to be scanned even if PMP is
3603 * currently not attached. Iterate manually.
3605 ata_scsi_handle_link_detach(&ap
->link
);
3607 for (i
= 0; i
< SATA_PMP_MAX_PORTS
; i
++)
3608 ata_scsi_handle_link_detach(&ap
->pmp_link
[i
]);
3610 /* scan for new ones */
3611 ata_scsi_scan_host(ap
, 0);
3617 * ata_scsi_user_scan - indication for user-initiated bus scan
3618 * @shost: SCSI host to scan
3619 * @channel: Channel to scan
3623 * This function is called when user explicitly requests bus
3624 * scan. Set probe pending flag and invoke EH.
3627 * SCSI layer (we don't care)
3632 static int ata_scsi_user_scan(struct Scsi_Host
*shost
, unsigned int channel
,
3633 unsigned int id
, unsigned int lun
)
3635 struct ata_port
*ap
= ata_shost_to_port(shost
);
3636 unsigned long flags
;
3639 if (!ap
->ops
->error_handler
)
3642 if (lun
!= SCAN_WILD_CARD
&& lun
)
3645 if (!sata_pmp_attached(ap
)) {
3646 if (channel
!= SCAN_WILD_CARD
&& channel
)
3650 if (id
!= SCAN_WILD_CARD
&& id
)
3655 spin_lock_irqsave(ap
->lock
, flags
);
3657 if (devno
== SCAN_WILD_CARD
) {
3658 struct ata_link
*link
;
3660 ata_for_each_link(link
, ap
, EDGE
) {
3661 struct ata_eh_info
*ehi
= &link
->eh_info
;
3662 ehi
->probe_mask
|= ATA_ALL_DEVICES
;
3663 ehi
->action
|= ATA_EH_RESET
;
3666 struct ata_device
*dev
= ata_find_dev(ap
, devno
);
3669 struct ata_eh_info
*ehi
= &dev
->link
->eh_info
;
3670 ehi
->probe_mask
|= 1 << dev
->devno
;
3671 ehi
->action
|= ATA_EH_RESET
;
3677 ata_port_schedule_eh(ap
);
3678 spin_unlock_irqrestore(ap
->lock
, flags
);
3679 ata_port_wait_eh(ap
);
3681 spin_unlock_irqrestore(ap
->lock
, flags
);
3687 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
3688 * @work: Pointer to ATA port to perform scsi_rescan_device()
3690 * After ATA pass thru (SAT) commands are executed successfully,
3691 * libata need to propagate the changes to SCSI layer. This
3692 * function must be executed from ata_aux_wq such that sdev
3693 * attach/detach don't race with rescan.
3696 * Kernel thread context (may sleep).
3698 void ata_scsi_dev_rescan(struct work_struct
*work
)
3700 struct ata_port
*ap
=
3701 container_of(work
, struct ata_port
, scsi_rescan_task
);
3702 struct ata_link
*link
;
3703 struct ata_device
*dev
;
3704 unsigned long flags
;
3706 spin_lock_irqsave(ap
->lock
, flags
);
3708 ata_for_each_link(link
, ap
, EDGE
) {
3709 ata_for_each_dev(dev
, link
, ENABLED
) {
3710 struct scsi_device
*sdev
= dev
->sdev
;
3714 if (scsi_device_get(sdev
))
3717 spin_unlock_irqrestore(ap
->lock
, flags
);
3718 scsi_rescan_device(&(sdev
->sdev_gendev
));
3719 scsi_device_put(sdev
);
3720 spin_lock_irqsave(ap
->lock
, flags
);
3724 spin_unlock_irqrestore(ap
->lock
, flags
);
3728 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
3729 * @host: ATA host container for all SAS ports
3730 * @port_info: Information from low-level host driver
3731 * @shost: SCSI host that the scsi device is attached to
3734 * PCI/etc. bus probe sem.
3737 * ata_port pointer on success / NULL on failure.
3740 struct ata_port
*ata_sas_port_alloc(struct ata_host
*host
,
3741 struct ata_port_info
*port_info
,
3742 struct Scsi_Host
*shost
)
3744 struct ata_port
*ap
;
3746 ap
= ata_port_alloc(host
);
3751 ap
->lock
= shost
->host_lock
;
3752 ap
->pio_mask
= port_info
->pio_mask
;
3753 ap
->mwdma_mask
= port_info
->mwdma_mask
;
3754 ap
->udma_mask
= port_info
->udma_mask
;
3755 ap
->flags
|= port_info
->flags
;
3756 ap
->ops
= port_info
->port_ops
;
3757 ap
->cbl
= ATA_CBL_SATA
;
3761 EXPORT_SYMBOL_GPL(ata_sas_port_alloc
);
3764 * ata_sas_port_start - Set port up for dma.
3765 * @ap: Port to initialize
3767 * Called just after data structures for each port are
3770 * May be used as the port_start() entry in ata_port_operations.
3773 * Inherited from caller.
3775 int ata_sas_port_start(struct ata_port
*ap
)
3779 EXPORT_SYMBOL_GPL(ata_sas_port_start
);
3782 * ata_port_stop - Undo ata_sas_port_start()
3783 * @ap: Port to shut down
3785 * May be used as the port_stop() entry in ata_port_operations.
3788 * Inherited from caller.
3791 void ata_sas_port_stop(struct ata_port
*ap
)
3794 EXPORT_SYMBOL_GPL(ata_sas_port_stop
);
3797 * ata_sas_port_init - Initialize a SATA device
3798 * @ap: SATA port to initialize
3801 * PCI/etc. bus probe sem.
3804 * Zero on success, non-zero on error.
3807 int ata_sas_port_init(struct ata_port
*ap
)
3809 int rc
= ap
->ops
->port_start(ap
);
3812 ap
->print_id
= ata_print_id
++;
3813 rc
= ata_bus_probe(ap
);
3818 EXPORT_SYMBOL_GPL(ata_sas_port_init
);
3821 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3822 * @ap: SATA port to destroy
3826 void ata_sas_port_destroy(struct ata_port
*ap
)
3828 if (ap
->ops
->port_stop
)
3829 ap
->ops
->port_stop(ap
);
3832 EXPORT_SYMBOL_GPL(ata_sas_port_destroy
);
3835 * ata_sas_slave_configure - Default slave_config routine for libata devices
3836 * @sdev: SCSI device to configure
3837 * @ap: ATA port to which SCSI device is attached
3843 int ata_sas_slave_configure(struct scsi_device
*sdev
, struct ata_port
*ap
)
3845 ata_scsi_sdev_config(sdev
);
3846 ata_scsi_dev_config(sdev
, ap
->link
.device
);
3849 EXPORT_SYMBOL_GPL(ata_sas_slave_configure
);
3852 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3853 * @cmd: SCSI command to be sent
3854 * @done: Completion function, called when command is complete
3855 * @ap: ATA port to which the command is being sent
3858 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3862 int ata_sas_queuecmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*),
3863 struct ata_port
*ap
)
3867 ata_scsi_dump_cdb(ap
, cmd
);
3869 if (likely(ata_dev_enabled(ap
->link
.device
)))
3870 rc
= __ata_scsi_queuecmd(cmd
, done
, ap
->link
.device
);
3872 cmd
->result
= (DID_BAD_TARGET
<< 16);
3877 EXPORT_SYMBOL_GPL(ata_sas_queuecmd
);