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 <linux/export.h>
41 #include <scsi/scsi.h>
42 #include <scsi/scsi_host.h>
43 #include <scsi/scsi_cmnd.h>
44 #include <scsi/scsi_eh.h>
45 #include <scsi/scsi_device.h>
46 #include <scsi/scsi_tcq.h>
47 #include <scsi/scsi_transport.h>
48 #include <linux/libata.h>
49 #include <linux/hdreg.h>
50 #include <linux/uaccess.h>
51 #include <linux/suspend.h>
52 #include <asm/unaligned.h>
55 #include "libata-transport.h"
57 #define ATA_SCSI_RBUF_SIZE 4096
59 static DEFINE_SPINLOCK(ata_scsi_rbuf_lock
);
60 static u8 ata_scsi_rbuf
[ATA_SCSI_RBUF_SIZE
];
62 typedef unsigned int (*ata_xlat_func_t
)(struct ata_queued_cmd
*qc
);
64 static struct ata_device
*__ata_scsi_find_dev(struct ata_port
*ap
,
65 const struct scsi_device
*scsidev
);
66 static struct ata_device
*ata_scsi_find_dev(struct ata_port
*ap
,
67 const struct scsi_device
*scsidev
);
69 #define RW_RECOVERY_MPAGE 0x1
70 #define RW_RECOVERY_MPAGE_LEN 12
71 #define CACHE_MPAGE 0x8
72 #define CACHE_MPAGE_LEN 20
73 #define CONTROL_MPAGE 0xa
74 #define CONTROL_MPAGE_LEN 12
75 #define ALL_MPAGES 0x3f
76 #define ALL_SUB_MPAGES 0xff
79 static const u8 def_rw_recovery_mpage
[RW_RECOVERY_MPAGE_LEN
] = {
81 RW_RECOVERY_MPAGE_LEN
- 2,
83 0, /* read retry count */
85 0, /* write retry count */
89 static const u8 def_cache_mpage
[CACHE_MPAGE_LEN
] = {
92 0, /* contains WCE, needs to be 0 for logic */
93 0, 0, 0, 0, 0, 0, 0, 0, 0,
94 0, /* contains DRA, needs to be 0 for logic */
98 static const u8 def_control_mpage
[CONTROL_MPAGE_LEN
] = {
100 CONTROL_MPAGE_LEN
- 2,
101 2, /* DSENSE=0, GLTSD=1 */
102 0, /* [QAM+QERR may be 1, see 05-359r1] */
103 0, 0, 0, 0, 0xff, 0xff,
104 0, 30 /* extended self test time, see 05-359r1 */
107 static const char *ata_lpm_policy_names
[] = {
108 [ATA_LPM_UNKNOWN
] = "max_performance",
109 [ATA_LPM_MAX_POWER
] = "max_performance",
110 [ATA_LPM_MED_POWER
] = "medium_power",
111 [ATA_LPM_MIN_POWER
] = "min_power",
114 static ssize_t
ata_scsi_lpm_store(struct device
*dev
,
115 struct device_attribute
*attr
,
116 const char *buf
, size_t count
)
118 struct Scsi_Host
*shost
= class_to_shost(dev
);
119 struct ata_port
*ap
= ata_shost_to_port(shost
);
120 enum ata_lpm_policy policy
;
123 /* UNKNOWN is internal state, iterate from MAX_POWER */
124 for (policy
= ATA_LPM_MAX_POWER
;
125 policy
< ARRAY_SIZE(ata_lpm_policy_names
); policy
++) {
126 const char *name
= ata_lpm_policy_names
[policy
];
128 if (strncmp(name
, buf
, strlen(name
)) == 0)
131 if (policy
== ARRAY_SIZE(ata_lpm_policy_names
))
134 spin_lock_irqsave(ap
->lock
, flags
);
135 ap
->target_lpm_policy
= policy
;
136 ata_port_schedule_eh(ap
);
137 spin_unlock_irqrestore(ap
->lock
, flags
);
142 static ssize_t
ata_scsi_lpm_show(struct device
*dev
,
143 struct device_attribute
*attr
, char *buf
)
145 struct Scsi_Host
*shost
= class_to_shost(dev
);
146 struct ata_port
*ap
= ata_shost_to_port(shost
);
148 if (ap
->target_lpm_policy
>= ARRAY_SIZE(ata_lpm_policy_names
))
151 return snprintf(buf
, PAGE_SIZE
, "%s\n",
152 ata_lpm_policy_names
[ap
->target_lpm_policy
]);
154 DEVICE_ATTR(link_power_management_policy
, S_IRUGO
| S_IWUSR
,
155 ata_scsi_lpm_show
, ata_scsi_lpm_store
);
156 EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy
);
158 static ssize_t
ata_scsi_park_show(struct device
*device
,
159 struct device_attribute
*attr
, char *buf
)
161 struct scsi_device
*sdev
= to_scsi_device(device
);
163 struct ata_link
*link
;
164 struct ata_device
*dev
;
165 unsigned long flags
, now
;
166 unsigned int uninitialized_var(msecs
);
169 ap
= ata_shost_to_port(sdev
->host
);
171 spin_lock_irqsave(ap
->lock
, flags
);
172 dev
= ata_scsi_find_dev(ap
, sdev
);
177 if (dev
->flags
& ATA_DFLAG_NO_UNLOAD
) {
184 if (ap
->pflags
& ATA_PFLAG_EH_IN_PROGRESS
&&
185 link
->eh_context
.unloaded_mask
& (1 << dev
->devno
) &&
186 time_after(dev
->unpark_deadline
, now
))
187 msecs
= jiffies_to_msecs(dev
->unpark_deadline
- now
);
192 spin_unlock_irq(ap
->lock
);
194 return rc
? rc
: snprintf(buf
, 20, "%u\n", msecs
);
197 static ssize_t
ata_scsi_park_store(struct device
*device
,
198 struct device_attribute
*attr
,
199 const char *buf
, size_t len
)
201 struct scsi_device
*sdev
= to_scsi_device(device
);
203 struct ata_device
*dev
;
208 rc
= strict_strtol(buf
, 10, &input
);
209 if (rc
|| input
< -2)
211 if (input
> ATA_TMOUT_MAX_PARK
) {
213 input
= ATA_TMOUT_MAX_PARK
;
216 ap
= ata_shost_to_port(sdev
->host
);
218 spin_lock_irqsave(ap
->lock
, flags
);
219 dev
= ata_scsi_find_dev(ap
, sdev
);
220 if (unlikely(!dev
)) {
224 if (dev
->class != ATA_DEV_ATA
) {
230 if (dev
->flags
& ATA_DFLAG_NO_UNLOAD
) {
235 dev
->unpark_deadline
= ata_deadline(jiffies
, input
);
236 dev
->link
->eh_info
.dev_action
[dev
->devno
] |= ATA_EH_PARK
;
237 ata_port_schedule_eh(ap
);
238 complete(&ap
->park_req_pending
);
242 dev
->flags
&= ~ATA_DFLAG_NO_UNLOAD
;
245 dev
->flags
|= ATA_DFLAG_NO_UNLOAD
;
250 spin_unlock_irqrestore(ap
->lock
, flags
);
252 return rc
? rc
: len
;
254 DEVICE_ATTR(unload_heads
, S_IRUGO
| S_IWUSR
,
255 ata_scsi_park_show
, ata_scsi_park_store
);
256 EXPORT_SYMBOL_GPL(dev_attr_unload_heads
);
258 static void ata_scsi_set_sense(struct scsi_cmnd
*cmd
, u8 sk
, u8 asc
, u8 ascq
)
260 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
262 scsi_build_sense_buffer(0, cmd
->sense_buffer
, sk
, asc
, ascq
);
266 ata_scsi_em_message_store(struct device
*dev
, struct device_attribute
*attr
,
267 const char *buf
, size_t count
)
269 struct Scsi_Host
*shost
= class_to_shost(dev
);
270 struct ata_port
*ap
= ata_shost_to_port(shost
);
271 if (ap
->ops
->em_store
&& (ap
->flags
& ATA_FLAG_EM
))
272 return ap
->ops
->em_store(ap
, buf
, count
);
277 ata_scsi_em_message_show(struct device
*dev
, struct device_attribute
*attr
,
280 struct Scsi_Host
*shost
= class_to_shost(dev
);
281 struct ata_port
*ap
= ata_shost_to_port(shost
);
283 if (ap
->ops
->em_show
&& (ap
->flags
& ATA_FLAG_EM
))
284 return ap
->ops
->em_show(ap
, buf
);
287 DEVICE_ATTR(em_message
, S_IRUGO
| S_IWUSR
,
288 ata_scsi_em_message_show
, ata_scsi_em_message_store
);
289 EXPORT_SYMBOL_GPL(dev_attr_em_message
);
292 ata_scsi_em_message_type_show(struct device
*dev
, struct device_attribute
*attr
,
295 struct Scsi_Host
*shost
= class_to_shost(dev
);
296 struct ata_port
*ap
= ata_shost_to_port(shost
);
298 return snprintf(buf
, 23, "%d\n", ap
->em_message_type
);
300 DEVICE_ATTR(em_message_type
, S_IRUGO
,
301 ata_scsi_em_message_type_show
, NULL
);
302 EXPORT_SYMBOL_GPL(dev_attr_em_message_type
);
305 ata_scsi_activity_show(struct device
*dev
, struct device_attribute
*attr
,
308 struct scsi_device
*sdev
= to_scsi_device(dev
);
309 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
310 struct ata_device
*atadev
= ata_scsi_find_dev(ap
, sdev
);
312 if (ap
->ops
->sw_activity_show
&& (ap
->flags
& ATA_FLAG_SW_ACTIVITY
))
313 return ap
->ops
->sw_activity_show(atadev
, buf
);
318 ata_scsi_activity_store(struct device
*dev
, struct device_attribute
*attr
,
319 const char *buf
, size_t count
)
321 struct scsi_device
*sdev
= to_scsi_device(dev
);
322 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
323 struct ata_device
*atadev
= ata_scsi_find_dev(ap
, sdev
);
324 enum sw_activity val
;
327 if (ap
->ops
->sw_activity_store
&& (ap
->flags
& ATA_FLAG_SW_ACTIVITY
)) {
328 val
= simple_strtoul(buf
, NULL
, 0);
330 case OFF
: case BLINK_ON
: case BLINK_OFF
:
331 rc
= ap
->ops
->sw_activity_store(atadev
, val
);
340 DEVICE_ATTR(sw_activity
, S_IWUSR
| S_IRUGO
, ata_scsi_activity_show
,
341 ata_scsi_activity_store
);
342 EXPORT_SYMBOL_GPL(dev_attr_sw_activity
);
344 struct device_attribute
*ata_common_sdev_attrs
[] = {
345 &dev_attr_unload_heads
,
348 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs
);
350 static void ata_scsi_invalid_field(struct scsi_cmnd
*cmd
)
352 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
353 /* "Invalid field in cbd" */
358 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
359 * @sdev: SCSI device for which BIOS geometry is to be determined
360 * @bdev: block device associated with @sdev
361 * @capacity: capacity of SCSI device
362 * @geom: location to which geometry will be output
364 * Generic bios head/sector/cylinder calculator
365 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
366 * mapping. Some situations may arise where the disk is not
367 * bootable if this is not used.
370 * Defined by the SCSI layer. We don't really care.
375 int ata_std_bios_param(struct scsi_device
*sdev
, struct block_device
*bdev
,
376 sector_t capacity
, int geom
[])
380 sector_div(capacity
, 255*63);
387 * ata_scsi_unlock_native_capacity - unlock native capacity
388 * @sdev: SCSI device to adjust device capacity for
390 * This function is called if a partition on @sdev extends beyond
391 * the end of the device. It requests EH to unlock HPA.
394 * Defined by the SCSI layer. Might sleep.
396 void ata_scsi_unlock_native_capacity(struct scsi_device
*sdev
)
398 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
399 struct ata_device
*dev
;
402 spin_lock_irqsave(ap
->lock
, flags
);
404 dev
= ata_scsi_find_dev(ap
, sdev
);
405 if (dev
&& dev
->n_sectors
< dev
->n_native_sectors
) {
406 dev
->flags
|= ATA_DFLAG_UNLOCK_HPA
;
407 dev
->link
->eh_info
.action
|= ATA_EH_RESET
;
408 ata_port_schedule_eh(ap
);
411 spin_unlock_irqrestore(ap
->lock
, flags
);
412 ata_port_wait_eh(ap
);
416 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
418 * @sdev: SCSI device to get identify data for
419 * @arg: User buffer area for identify data
422 * Defined by the SCSI layer. We don't really care.
425 * Zero on success, negative errno on error.
427 static int ata_get_identity(struct ata_port
*ap
, struct scsi_device
*sdev
,
430 struct ata_device
*dev
= ata_scsi_find_dev(ap
, sdev
);
431 u16 __user
*dst
= arg
;
437 if (copy_to_user(dst
, dev
->id
, ATA_ID_WORDS
* sizeof(u16
)))
440 ata_id_string(dev
->id
, buf
, ATA_ID_PROD
, ATA_ID_PROD_LEN
);
441 if (copy_to_user(dst
+ ATA_ID_PROD
, buf
, ATA_ID_PROD_LEN
))
444 ata_id_string(dev
->id
, buf
, ATA_ID_FW_REV
, ATA_ID_FW_REV_LEN
);
445 if (copy_to_user(dst
+ ATA_ID_FW_REV
, buf
, ATA_ID_FW_REV_LEN
))
448 ata_id_string(dev
->id
, buf
, ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
449 if (copy_to_user(dst
+ ATA_ID_SERNO
, buf
, ATA_ID_SERNO_LEN
))
456 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
457 * @scsidev: Device to which we are issuing command
458 * @arg: User provided data for issuing command
461 * Defined by the SCSI layer. We don't really care.
464 * Zero on success, negative errno on error.
466 int ata_cmd_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
469 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
470 u8 args
[4], *argbuf
= NULL
, *sensebuf
= NULL
;
472 enum dma_data_direction data_dir
;
478 if (copy_from_user(args
, arg
, sizeof(args
)))
481 sensebuf
= kzalloc(SCSI_SENSE_BUFFERSIZE
, GFP_NOIO
);
485 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
488 argsize
= ATA_SECT_SIZE
* args
[3];
489 argbuf
= kmalloc(argsize
, GFP_KERNEL
);
490 if (argbuf
== NULL
) {
495 scsi_cmd
[1] = (4 << 1); /* PIO Data-in */
496 scsi_cmd
[2] = 0x0e; /* no off.line or cc, read from dev,
497 block count in sector count field */
498 data_dir
= DMA_FROM_DEVICE
;
500 scsi_cmd
[1] = (3 << 1); /* Non-data */
501 scsi_cmd
[2] = 0x20; /* cc but no off.line or data xfer */
505 scsi_cmd
[0] = ATA_16
;
507 scsi_cmd
[4] = args
[2];
508 if (args
[0] == ATA_CMD_SMART
) { /* hack -- ide driver does this too */
509 scsi_cmd
[6] = args
[3];
510 scsi_cmd
[8] = args
[1];
514 scsi_cmd
[6] = args
[1];
516 scsi_cmd
[14] = args
[0];
518 /* Good values for timeout and retries? Values below
519 from scsi_ioctl_send_command() for default case... */
520 cmd_result
= scsi_execute(scsidev
, scsi_cmd
, data_dir
, argbuf
, argsize
,
521 sensebuf
, (10*HZ
), 5, 0, NULL
);
523 if (driver_byte(cmd_result
) == DRIVER_SENSE
) {/* sense data available */
524 u8
*desc
= sensebuf
+ 8;
525 cmd_result
&= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
527 /* If we set cc then ATA pass-through will cause a
528 * check condition even if no error. Filter that. */
529 if (cmd_result
& SAM_STAT_CHECK_CONDITION
) {
530 struct scsi_sense_hdr sshdr
;
531 scsi_normalize_sense(sensebuf
, SCSI_SENSE_BUFFERSIZE
,
533 if (sshdr
.sense_key
== 0 &&
534 sshdr
.asc
== 0 && sshdr
.ascq
== 0)
535 cmd_result
&= ~SAM_STAT_CHECK_CONDITION
;
538 /* Send userspace a few ATA registers (same as drivers/ide) */
539 if (sensebuf
[0] == 0x72 && /* format is "descriptor" */
540 desc
[0] == 0x09) { /* code is "ATA Descriptor" */
541 args
[0] = desc
[13]; /* status */
542 args
[1] = desc
[3]; /* error */
543 args
[2] = desc
[5]; /* sector count (0:7) */
544 if (copy_to_user(arg
, args
, sizeof(args
)))
556 && copy_to_user(arg
+ sizeof(args
), argbuf
, argsize
))
565 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
566 * @scsidev: Device to which we are issuing command
567 * @arg: User provided data for issuing command
570 * Defined by the SCSI layer. We don't really care.
573 * Zero on success, negative errno on error.
575 int ata_task_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
578 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
579 u8 args
[7], *sensebuf
= NULL
;
585 if (copy_from_user(args
, arg
, sizeof(args
)))
588 sensebuf
= kzalloc(SCSI_SENSE_BUFFERSIZE
, GFP_NOIO
);
592 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
593 scsi_cmd
[0] = ATA_16
;
594 scsi_cmd
[1] = (3 << 1); /* Non-data */
595 scsi_cmd
[2] = 0x20; /* cc but no off.line or data xfer */
596 scsi_cmd
[4] = args
[1];
597 scsi_cmd
[6] = args
[2];
598 scsi_cmd
[8] = args
[3];
599 scsi_cmd
[10] = args
[4];
600 scsi_cmd
[12] = args
[5];
601 scsi_cmd
[13] = args
[6] & 0x4f;
602 scsi_cmd
[14] = args
[0];
604 /* Good values for timeout and retries? Values below
605 from scsi_ioctl_send_command() for default case... */
606 cmd_result
= scsi_execute(scsidev
, scsi_cmd
, DMA_NONE
, NULL
, 0,
607 sensebuf
, (10*HZ
), 5, 0, NULL
);
609 if (driver_byte(cmd_result
) == DRIVER_SENSE
) {/* sense data available */
610 u8
*desc
= sensebuf
+ 8;
611 cmd_result
&= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
613 /* If we set cc then ATA pass-through will cause a
614 * check condition even if no error. Filter that. */
615 if (cmd_result
& SAM_STAT_CHECK_CONDITION
) {
616 struct scsi_sense_hdr sshdr
;
617 scsi_normalize_sense(sensebuf
, SCSI_SENSE_BUFFERSIZE
,
619 if (sshdr
.sense_key
== 0 &&
620 sshdr
.asc
== 0 && sshdr
.ascq
== 0)
621 cmd_result
&= ~SAM_STAT_CHECK_CONDITION
;
624 /* Send userspace ATA registers */
625 if (sensebuf
[0] == 0x72 && /* format is "descriptor" */
626 desc
[0] == 0x09) {/* code is "ATA Descriptor" */
627 args
[0] = desc
[13]; /* status */
628 args
[1] = desc
[3]; /* error */
629 args
[2] = desc
[5]; /* sector count (0:7) */
630 args
[3] = desc
[7]; /* lbal */
631 args
[4] = desc
[9]; /* lbam */
632 args
[5] = desc
[11]; /* lbah */
633 args
[6] = desc
[12]; /* select */
634 if (copy_to_user(arg
, args
, sizeof(args
)))
649 static int ata_ioc32(struct ata_port
*ap
)
651 if (ap
->flags
& ATA_FLAG_PIO_DMA
)
653 if (ap
->pflags
& ATA_PFLAG_PIO32
)
658 int ata_sas_scsi_ioctl(struct ata_port
*ap
, struct scsi_device
*scsidev
,
659 int cmd
, void __user
*arg
)
661 int val
= -EINVAL
, rc
= -EINVAL
;
665 case ATA_IOC_GET_IO32
:
666 spin_lock_irqsave(ap
->lock
, flags
);
668 spin_unlock_irqrestore(ap
->lock
, flags
);
669 if (copy_to_user(arg
, &val
, 1))
673 case ATA_IOC_SET_IO32
:
674 val
= (unsigned long) arg
;
676 spin_lock_irqsave(ap
->lock
, flags
);
677 if (ap
->pflags
& ATA_PFLAG_PIO32CHANGE
) {
679 ap
->pflags
|= ATA_PFLAG_PIO32
;
681 ap
->pflags
&= ~ATA_PFLAG_PIO32
;
683 if (val
!= ata_ioc32(ap
))
686 spin_unlock_irqrestore(ap
->lock
, flags
);
689 case HDIO_GET_IDENTITY
:
690 return ata_get_identity(ap
, scsidev
, arg
);
693 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
695 return ata_cmd_ioctl(scsidev
, arg
);
697 case HDIO_DRIVE_TASK
:
698 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
700 return ata_task_ioctl(scsidev
, arg
);
709 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl
);
711 int ata_scsi_ioctl(struct scsi_device
*scsidev
, int cmd
, void __user
*arg
)
713 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev
->host
),
716 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
719 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
720 * @dev: ATA device to which the new command is attached
721 * @cmd: SCSI command that originated this ATA command
723 * Obtain a reference to an unused ata_queued_cmd structure,
724 * which is the basic libata structure representing a single
725 * ATA command sent to the hardware.
727 * If a command was available, fill in the SCSI-specific
728 * portions of the structure with information on the
732 * spin_lock_irqsave(host lock)
735 * Command allocated, or %NULL if none available.
737 static struct ata_queued_cmd
*ata_scsi_qc_new(struct ata_device
*dev
,
738 struct scsi_cmnd
*cmd
)
740 struct ata_queued_cmd
*qc
;
742 qc
= ata_qc_new_init(dev
);
745 qc
->scsidone
= cmd
->scsi_done
;
747 qc
->sg
= scsi_sglist(cmd
);
748 qc
->n_elem
= scsi_sg_count(cmd
);
750 cmd
->result
= (DID_OK
<< 16) | (QUEUE_FULL
<< 1);
757 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd
*qc
)
759 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
761 qc
->extrabytes
= scmd
->request
->extra_len
;
762 qc
->nbytes
= scsi_bufflen(scmd
) + qc
->extrabytes
;
766 * ata_dump_status - user friendly display of error info
767 * @id: id of the port in question
768 * @tf: ptr to filled out taskfile
770 * Decode and dump the ATA error/status registers for the user so
771 * that they have some idea what really happened at the non
772 * make-believe layer.
775 * inherited from caller
777 static void ata_dump_status(unsigned id
, struct ata_taskfile
*tf
)
779 u8 stat
= tf
->command
, err
= tf
->feature
;
781 printk(KERN_WARNING
"ata%u: status=0x%02x { ", id
, stat
);
782 if (stat
& ATA_BUSY
) {
783 printk("Busy }\n"); /* Data is not valid in this case */
785 if (stat
& 0x40) printk("DriveReady ");
786 if (stat
& 0x20) printk("DeviceFault ");
787 if (stat
& 0x10) printk("SeekComplete ");
788 if (stat
& 0x08) printk("DataRequest ");
789 if (stat
& 0x04) printk("CorrectedError ");
790 if (stat
& 0x02) printk("Index ");
791 if (stat
& 0x01) printk("Error ");
795 printk(KERN_WARNING
"ata%u: error=0x%02x { ", id
, err
);
796 if (err
& 0x04) printk("DriveStatusError ");
798 if (err
& 0x04) printk("BadCRC ");
799 else printk("Sector ");
801 if (err
& 0x40) printk("UncorrectableError ");
802 if (err
& 0x10) printk("SectorIdNotFound ");
803 if (err
& 0x02) printk("TrackZeroNotFound ");
804 if (err
& 0x01) printk("AddrMarkNotFound ");
811 * ata_to_sense_error - convert ATA error to SCSI error
812 * @id: ATA device number
813 * @drv_stat: value contained in ATA status register
814 * @drv_err: value contained in ATA error register
815 * @sk: the sense key we'll fill out
816 * @asc: the additional sense code we'll fill out
817 * @ascq: the additional sense code qualifier we'll fill out
818 * @verbose: be verbose
820 * Converts an ATA error into a SCSI error. Fill out pointers to
821 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
822 * format sense blocks.
825 * spin_lock_irqsave(host lock)
827 static void ata_to_sense_error(unsigned id
, u8 drv_stat
, u8 drv_err
, u8
*sk
,
828 u8
*asc
, u8
*ascq
, int verbose
)
832 /* Based on the 3ware driver translation table */
833 static const unsigned char sense_table
[][4] = {
835 {0xd1, ABORTED_COMMAND
, 0x00, 0x00}, // Device busy Aborted command
837 {0xd0, ABORTED_COMMAND
, 0x00, 0x00}, // Device busy Aborted command
839 {0x61, HARDWARE_ERROR
, 0x00, 0x00}, // Device fault Hardware error
840 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
841 {0x84, ABORTED_COMMAND
, 0x47, 0x00}, // Data CRC error SCSI parity error
842 /* MC|ID|ABRT|TRK0|MARK */
843 {0x37, NOT_READY
, 0x04, 0x00}, // Unit offline Not ready
845 {0x09, NOT_READY
, 0x04, 0x00}, // Unrecovered disk error Not ready
846 /* Bad address mark */
847 {0x01, MEDIUM_ERROR
, 0x13, 0x00}, // Address mark not found Address mark not found for data field
849 {0x02, HARDWARE_ERROR
, 0x00, 0x00}, // Track 0 not found Hardware error
851 {0x04, ABORTED_COMMAND
, 0x00, 0x00}, // Aborted command Aborted command
852 /* Media change request */
853 {0x08, NOT_READY
, 0x04, 0x00}, // Media change request FIXME: faking offline
855 {0x10, ABORTED_COMMAND
, 0x14, 0x00}, // ID not found Recorded entity not found
857 {0x08, NOT_READY
, 0x04, 0x00}, // Media change FIXME: faking offline
859 {0x40, MEDIUM_ERROR
, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
860 /* BBD - block marked bad */
861 {0x80, MEDIUM_ERROR
, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
862 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
864 static const unsigned char stat_table
[][4] = {
865 /* Must be first because BUSY means no other bits valid */
866 {0x80, ABORTED_COMMAND
, 0x47, 0x00}, // Busy, fake parity for now
867 {0x20, HARDWARE_ERROR
, 0x00, 0x00}, // Device fault
868 {0x08, ABORTED_COMMAND
, 0x47, 0x00}, // Timed out in xfer, fake parity for now
869 {0x04, RECOVERED_ERROR
, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
870 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
874 * Is this an error we can process/parse
876 if (drv_stat
& ATA_BUSY
) {
877 drv_err
= 0; /* Ignore the err bits, they're invalid */
881 /* Look for drv_err */
882 for (i
= 0; sense_table
[i
][0] != 0xFF; i
++) {
883 /* Look for best matches first */
884 if ((sense_table
[i
][0] & drv_err
) ==
886 *sk
= sense_table
[i
][1];
887 *asc
= sense_table
[i
][2];
888 *ascq
= sense_table
[i
][3];
892 /* No immediate match */
894 printk(KERN_WARNING
"ata%u: no sense translation for "
895 "error 0x%02x\n", id
, drv_err
);
898 /* Fall back to interpreting status bits */
899 for (i
= 0; stat_table
[i
][0] != 0xFF; i
++) {
900 if (stat_table
[i
][0] & drv_stat
) {
901 *sk
= stat_table
[i
][1];
902 *asc
= stat_table
[i
][2];
903 *ascq
= stat_table
[i
][3];
907 /* No error? Undecoded? */
909 printk(KERN_WARNING
"ata%u: no sense translation for "
910 "status: 0x%02x\n", id
, drv_stat
);
912 /* We need a sensible error return here, which is tricky, and one
913 that won't cause people to do things like return a disk wrongly */
914 *sk
= ABORTED_COMMAND
;
920 printk(KERN_ERR
"ata%u: translated ATA stat/err 0x%02x/%02x "
921 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
922 id
, drv_stat
, drv_err
, *sk
, *asc
, *ascq
);
927 * ata_gen_passthru_sense - Generate check condition sense block.
928 * @qc: Command that completed.
930 * This function is specific to the ATA descriptor format sense
931 * block specified for the ATA pass through commands. Regardless
932 * of whether the command errored or not, return a sense
933 * block. Copy all controller registers into the sense
934 * block. Clear sense key, ASC & ASCQ if there is no error.
939 static void ata_gen_passthru_sense(struct ata_queued_cmd
*qc
)
941 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
942 struct ata_taskfile
*tf
= &qc
->result_tf
;
943 unsigned char *sb
= cmd
->sense_buffer
;
944 unsigned char *desc
= sb
+ 8;
945 int verbose
= qc
->ap
->ops
->error_handler
== NULL
;
947 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
949 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
952 * Use ata_to_sense_error() to map status register bits
953 * onto sense key, asc & ascq.
956 tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
957 ata_to_sense_error(qc
->ap
->print_id
, tf
->command
, tf
->feature
,
958 &sb
[1], &sb
[2], &sb
[3], verbose
);
963 * Sense data is current and format is descriptor.
969 /* set length of additional sense data */
974 * Copy registers into sense buffer.
977 desc
[3] = tf
->feature
; /* == error reg */
982 desc
[12] = tf
->device
;
983 desc
[13] = tf
->command
; /* == status reg */
986 * Fill in Extend bit, and the high order bytes
989 if (tf
->flags
& ATA_TFLAG_LBA48
) {
991 desc
[4] = tf
->hob_nsect
;
992 desc
[6] = tf
->hob_lbal
;
993 desc
[8] = tf
->hob_lbam
;
994 desc
[10] = tf
->hob_lbah
;
999 * ata_gen_ata_sense - generate a SCSI fixed sense block
1000 * @qc: Command that we are erroring out
1002 * Generate sense block for a failed ATA command @qc. Descriptor
1003 * format is used to accommodate LBA48 block address.
1008 static void ata_gen_ata_sense(struct ata_queued_cmd
*qc
)
1010 struct ata_device
*dev
= qc
->dev
;
1011 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1012 struct ata_taskfile
*tf
= &qc
->result_tf
;
1013 unsigned char *sb
= cmd
->sense_buffer
;
1014 unsigned char *desc
= sb
+ 8;
1015 int verbose
= qc
->ap
->ops
->error_handler
== NULL
;
1018 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
1020 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
1022 /* sense data is current and format is descriptor */
1025 /* Use ata_to_sense_error() to map status register bits
1026 * onto sense key, asc & ascq.
1029 tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
1030 ata_to_sense_error(qc
->ap
->print_id
, tf
->command
, tf
->feature
,
1031 &sb
[1], &sb
[2], &sb
[3], verbose
);
1035 block
= ata_tf_read_block(&qc
->result_tf
, dev
);
1037 /* information sense data descriptor */
1042 desc
[2] |= 0x80; /* valid */
1043 desc
[6] = block
>> 40;
1044 desc
[7] = block
>> 32;
1045 desc
[8] = block
>> 24;
1046 desc
[9] = block
>> 16;
1047 desc
[10] = block
>> 8;
1051 static void ata_scsi_sdev_config(struct scsi_device
*sdev
)
1053 sdev
->use_10_for_rw
= 1;
1054 sdev
->use_10_for_ms
= 1;
1056 /* Schedule policy is determined by ->qc_defer() callback and
1057 * it needs to see every deferred qc. Set dev_blocked to 1 to
1058 * prevent SCSI midlayer from automatically deferring
1061 sdev
->max_device_blocked
= 1;
1065 * atapi_drain_needed - Check whether data transfer may overflow
1066 * @rq: request to be checked
1068 * ATAPI commands which transfer variable length data to host
1069 * might overflow due to application error or hardare bug. This
1070 * function checks whether overflow should be drained and ignored
1077 * 1 if ; otherwise, 0.
1079 static int atapi_drain_needed(struct request
*rq
)
1081 if (likely(rq
->cmd_type
!= REQ_TYPE_BLOCK_PC
))
1084 if (!blk_rq_bytes(rq
) || (rq
->cmd_flags
& REQ_WRITE
))
1087 return atapi_cmd_type(rq
->cmd
[0]) == ATAPI_MISC
;
1090 static int ata_scsi_dev_config(struct scsi_device
*sdev
,
1091 struct ata_device
*dev
)
1093 struct request_queue
*q
= sdev
->request_queue
;
1095 if (!ata_id_has_unload(dev
->id
))
1096 dev
->flags
|= ATA_DFLAG_NO_UNLOAD
;
1098 /* configure max sectors */
1099 blk_queue_max_hw_sectors(q
, dev
->max_sectors
);
1101 if (dev
->class == ATA_DEV_ATAPI
) {
1104 sdev
->sector_size
= ATA_SECT_SIZE
;
1106 /* set DMA padding */
1107 blk_queue_update_dma_pad(q
, ATA_DMA_PAD_SZ
- 1);
1109 /* configure draining */
1110 buf
= kmalloc(ATAPI_MAX_DRAIN
, q
->bounce_gfp
| GFP_KERNEL
);
1112 ata_dev_err(dev
, "drain buffer allocation failed\n");
1116 blk_queue_dma_drain(q
, atapi_drain_needed
, buf
, ATAPI_MAX_DRAIN
);
1118 sdev
->sector_size
= ata_id_logical_sector_size(dev
->id
);
1119 sdev
->manage_start_stop
= 1;
1123 * ata_pio_sectors() expects buffer for each sector to not cross
1124 * page boundary. Enforce it by requiring buffers to be sector
1125 * aligned, which works iff sector_size is not larger than
1126 * PAGE_SIZE. ATAPI devices also need the alignment as
1127 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1129 if (sdev
->sector_size
> PAGE_SIZE
)
1131 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1134 blk_queue_update_dma_alignment(q
, sdev
->sector_size
- 1);
1136 if (dev
->flags
& ATA_DFLAG_AN
)
1137 set_bit(SDEV_EVT_MEDIA_CHANGE
, sdev
->supported_events
);
1139 if (dev
->flags
& ATA_DFLAG_NCQ
) {
1142 depth
= min(sdev
->host
->can_queue
, ata_id_queue_depth(dev
->id
));
1143 depth
= min(ATA_MAX_QUEUE
- 1, depth
);
1144 scsi_adjust_queue_depth(sdev
, MSG_SIMPLE_TAG
, depth
);
1147 blk_queue_flush_queueable(q
, false);
1154 * ata_scsi_slave_config - Set SCSI device attributes
1155 * @sdev: SCSI device to examine
1157 * This is called before we actually start reading
1158 * and writing to the device, to configure certain
1159 * SCSI mid-layer behaviors.
1162 * Defined by SCSI layer. We don't really care.
1165 int ata_scsi_slave_config(struct scsi_device
*sdev
)
1167 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1168 struct ata_device
*dev
= __ata_scsi_find_dev(ap
, sdev
);
1171 ata_scsi_sdev_config(sdev
);
1174 rc
= ata_scsi_dev_config(sdev
, dev
);
1180 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1181 * @sdev: SCSI device to be destroyed
1183 * @sdev is about to be destroyed for hot/warm unplugging. If
1184 * this unplugging was initiated by libata as indicated by NULL
1185 * dev->sdev, this function doesn't have to do anything.
1186 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1187 * Clear dev->sdev, schedule the device for ATA detach and invoke
1191 * Defined by SCSI layer. We don't really care.
1193 void ata_scsi_slave_destroy(struct scsi_device
*sdev
)
1195 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1196 struct request_queue
*q
= sdev
->request_queue
;
1197 unsigned long flags
;
1198 struct ata_device
*dev
;
1200 if (!ap
->ops
->error_handler
)
1203 spin_lock_irqsave(ap
->lock
, flags
);
1204 dev
= __ata_scsi_find_dev(ap
, sdev
);
1205 if (dev
&& dev
->sdev
) {
1206 /* SCSI device already in CANCEL state, no need to offline it */
1208 dev
->flags
|= ATA_DFLAG_DETACH
;
1209 ata_port_schedule_eh(ap
);
1211 spin_unlock_irqrestore(ap
->lock
, flags
);
1213 kfree(q
->dma_drain_buffer
);
1214 q
->dma_drain_buffer
= NULL
;
1215 q
->dma_drain_size
= 0;
1219 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1220 * @sdev: SCSI device to configure queue depth for
1221 * @queue_depth: new queue depth
1222 * @reason: calling context
1224 * This is libata standard hostt->change_queue_depth callback.
1225 * SCSI will call into this callback when user tries to set queue
1229 * SCSI layer (we don't care)
1232 * Newly configured queue depth.
1234 int ata_scsi_change_queue_depth(struct scsi_device
*sdev
, int queue_depth
,
1237 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1238 struct ata_device
*dev
;
1239 unsigned long flags
;
1241 if (reason
!= SCSI_QDEPTH_DEFAULT
)
1244 if (queue_depth
< 1 || queue_depth
== sdev
->queue_depth
)
1245 return sdev
->queue_depth
;
1247 dev
= ata_scsi_find_dev(ap
, sdev
);
1248 if (!dev
|| !ata_dev_enabled(dev
))
1249 return sdev
->queue_depth
;
1252 spin_lock_irqsave(ap
->lock
, flags
);
1253 dev
->flags
&= ~ATA_DFLAG_NCQ_OFF
;
1254 if (queue_depth
== 1 || !ata_ncq_enabled(dev
)) {
1255 dev
->flags
|= ATA_DFLAG_NCQ_OFF
;
1258 spin_unlock_irqrestore(ap
->lock
, flags
);
1260 /* limit and apply queue depth */
1261 queue_depth
= min(queue_depth
, sdev
->host
->can_queue
);
1262 queue_depth
= min(queue_depth
, ata_id_queue_depth(dev
->id
));
1263 queue_depth
= min(queue_depth
, ATA_MAX_QUEUE
- 1);
1265 if (sdev
->queue_depth
== queue_depth
)
1268 scsi_adjust_queue_depth(sdev
, MSG_SIMPLE_TAG
, queue_depth
);
1273 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1274 * @qc: Storage for translated ATA taskfile
1276 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1277 * (to start). Perhaps these commands should be preceded by
1278 * CHECK POWER MODE to see what power mode the device is already in.
1279 * [See SAT revision 5 at www.t10.org]
1282 * spin_lock_irqsave(host lock)
1285 * Zero on success, non-zero on error.
1287 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd
*qc
)
1289 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1290 struct ata_taskfile
*tf
= &qc
->tf
;
1291 const u8
*cdb
= scmd
->cmnd
;
1293 if (scmd
->cmd_len
< 5)
1296 tf
->flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1297 tf
->protocol
= ATA_PROT_NODATA
;
1299 ; /* ignore IMMED bit, violates sat-r05 */
1302 goto invalid_fld
; /* LOEJ bit set not supported */
1303 if (((cdb
[4] >> 4) & 0xf) != 0)
1304 goto invalid_fld
; /* power conditions not supported */
1307 tf
->nsect
= 1; /* 1 sector, lba=0 */
1309 if (qc
->dev
->flags
& ATA_DFLAG_LBA
) {
1310 tf
->flags
|= ATA_TFLAG_LBA
;
1315 tf
->device
|= ATA_LBA
;
1318 tf
->lbal
= 0x1; /* sect */
1319 tf
->lbam
= 0x0; /* cyl low */
1320 tf
->lbah
= 0x0; /* cyl high */
1323 tf
->command
= ATA_CMD_VERIFY
; /* READ VERIFY */
1325 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1326 * or S5) causing some drives to spin up and down again.
1328 if ((qc
->ap
->flags
& ATA_FLAG_NO_POWEROFF_SPINDOWN
) &&
1329 system_state
== SYSTEM_POWER_OFF
)
1332 if ((qc
->ap
->flags
& ATA_FLAG_NO_HIBERNATE_SPINDOWN
) &&
1333 system_entering_hibernation())
1336 /* Issue ATA STANDBY IMMEDIATE command */
1337 tf
->command
= ATA_CMD_STANDBYNOW1
;
1341 * Standby and Idle condition timers could be implemented but that
1342 * would require libata to implement the Power condition mode page
1343 * and allow the user to change it. Changing mode pages requires
1344 * MODE SELECT to be implemented.
1350 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1351 /* "Invalid field in cbd" */
1354 scmd
->result
= SAM_STAT_GOOD
;
1360 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1361 * @qc: Storage for translated ATA taskfile
1363 * Sets up an ATA taskfile to issue FLUSH CACHE or
1367 * spin_lock_irqsave(host lock)
1370 * Zero on success, non-zero on error.
1372 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd
*qc
)
1374 struct ata_taskfile
*tf
= &qc
->tf
;
1376 tf
->flags
|= ATA_TFLAG_DEVICE
;
1377 tf
->protocol
= ATA_PROT_NODATA
;
1379 if (qc
->dev
->flags
& ATA_DFLAG_FLUSH_EXT
)
1380 tf
->command
= ATA_CMD_FLUSH_EXT
;
1382 tf
->command
= ATA_CMD_FLUSH
;
1384 /* flush is critical for IO integrity, consider it an IO command */
1385 qc
->flags
|= ATA_QCFLAG_IO
;
1391 * scsi_6_lba_len - Get LBA and transfer length
1392 * @cdb: SCSI command to translate
1394 * Calculate LBA and transfer length for 6-byte commands.
1398 * @plen: the transfer length
1400 static void scsi_6_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1405 VPRINTK("six-byte command\n");
1407 lba
|= ((u64
)(cdb
[1] & 0x1f)) << 16;
1408 lba
|= ((u64
)cdb
[2]) << 8;
1409 lba
|= ((u64
)cdb
[3]);
1418 * scsi_10_lba_len - Get LBA and transfer length
1419 * @cdb: SCSI command to translate
1421 * Calculate LBA and transfer length for 10-byte commands.
1425 * @plen: the transfer length
1427 static void scsi_10_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1432 VPRINTK("ten-byte command\n");
1434 lba
|= ((u64
)cdb
[2]) << 24;
1435 lba
|= ((u64
)cdb
[3]) << 16;
1436 lba
|= ((u64
)cdb
[4]) << 8;
1437 lba
|= ((u64
)cdb
[5]);
1439 len
|= ((u32
)cdb
[7]) << 8;
1440 len
|= ((u32
)cdb
[8]);
1447 * scsi_16_lba_len - Get LBA and transfer length
1448 * @cdb: SCSI command to translate
1450 * Calculate LBA and transfer length for 16-byte commands.
1454 * @plen: the transfer length
1456 static void scsi_16_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1461 VPRINTK("sixteen-byte command\n");
1463 lba
|= ((u64
)cdb
[2]) << 56;
1464 lba
|= ((u64
)cdb
[3]) << 48;
1465 lba
|= ((u64
)cdb
[4]) << 40;
1466 lba
|= ((u64
)cdb
[5]) << 32;
1467 lba
|= ((u64
)cdb
[6]) << 24;
1468 lba
|= ((u64
)cdb
[7]) << 16;
1469 lba
|= ((u64
)cdb
[8]) << 8;
1470 lba
|= ((u64
)cdb
[9]);
1472 len
|= ((u32
)cdb
[10]) << 24;
1473 len
|= ((u32
)cdb
[11]) << 16;
1474 len
|= ((u32
)cdb
[12]) << 8;
1475 len
|= ((u32
)cdb
[13]);
1482 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1483 * @qc: Storage for translated ATA taskfile
1485 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1488 * spin_lock_irqsave(host lock)
1491 * Zero on success, non-zero on error.
1493 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd
*qc
)
1495 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1496 struct ata_taskfile
*tf
= &qc
->tf
;
1497 struct ata_device
*dev
= qc
->dev
;
1498 u64 dev_sectors
= qc
->dev
->n_sectors
;
1499 const u8
*cdb
= scmd
->cmnd
;
1503 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1504 tf
->protocol
= ATA_PROT_NODATA
;
1506 if (cdb
[0] == VERIFY
) {
1507 if (scmd
->cmd_len
< 10)
1509 scsi_10_lba_len(cdb
, &block
, &n_block
);
1510 } else if (cdb
[0] == VERIFY_16
) {
1511 if (scmd
->cmd_len
< 16)
1513 scsi_16_lba_len(cdb
, &block
, &n_block
);
1519 if (block
>= dev_sectors
)
1521 if ((block
+ n_block
) > dev_sectors
)
1524 if (dev
->flags
& ATA_DFLAG_LBA
) {
1525 tf
->flags
|= ATA_TFLAG_LBA
;
1527 if (lba_28_ok(block
, n_block
)) {
1529 tf
->command
= ATA_CMD_VERIFY
;
1530 tf
->device
|= (block
>> 24) & 0xf;
1531 } else if (lba_48_ok(block
, n_block
)) {
1532 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
1536 tf
->flags
|= ATA_TFLAG_LBA48
;
1537 tf
->command
= ATA_CMD_VERIFY_EXT
;
1539 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
1541 tf
->hob_lbah
= (block
>> 40) & 0xff;
1542 tf
->hob_lbam
= (block
>> 32) & 0xff;
1543 tf
->hob_lbal
= (block
>> 24) & 0xff;
1545 /* request too large even for LBA48 */
1548 tf
->nsect
= n_block
& 0xff;
1550 tf
->lbah
= (block
>> 16) & 0xff;
1551 tf
->lbam
= (block
>> 8) & 0xff;
1552 tf
->lbal
= block
& 0xff;
1554 tf
->device
|= ATA_LBA
;
1557 u32 sect
, head
, cyl
, track
;
1559 if (!lba_28_ok(block
, n_block
))
1562 /* Convert LBA to CHS */
1563 track
= (u32
)block
/ dev
->sectors
;
1564 cyl
= track
/ dev
->heads
;
1565 head
= track
% dev
->heads
;
1566 sect
= (u32
)block
% dev
->sectors
+ 1;
1568 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1569 (u32
)block
, track
, cyl
, head
, sect
);
1571 /* Check whether the converted CHS can fit.
1575 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
1578 tf
->command
= ATA_CMD_VERIFY
;
1579 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
1582 tf
->lbah
= cyl
>> 8;
1589 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1590 /* "Invalid field in cbd" */
1594 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1595 /* "Logical Block Address out of range" */
1599 scmd
->result
= SAM_STAT_GOOD
;
1604 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1605 * @qc: Storage for translated ATA taskfile
1607 * Converts any of six SCSI read/write commands into the
1608 * ATA counterpart, including starting sector (LBA),
1609 * sector count, and taking into account the device's LBA48
1612 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1613 * %WRITE_16 are currently supported.
1616 * spin_lock_irqsave(host lock)
1619 * Zero on success, non-zero on error.
1621 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd
*qc
)
1623 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1624 const u8
*cdb
= scmd
->cmnd
;
1625 unsigned int tf_flags
= 0;
1630 if (cdb
[0] == WRITE_10
|| cdb
[0] == WRITE_6
|| cdb
[0] == WRITE_16
)
1631 tf_flags
|= ATA_TFLAG_WRITE
;
1633 /* Calculate the SCSI LBA, transfer length and FUA. */
1637 if (unlikely(scmd
->cmd_len
< 10))
1639 scsi_10_lba_len(cdb
, &block
, &n_block
);
1640 if (unlikely(cdb
[1] & (1 << 3)))
1641 tf_flags
|= ATA_TFLAG_FUA
;
1645 if (unlikely(scmd
->cmd_len
< 6))
1647 scsi_6_lba_len(cdb
, &block
, &n_block
);
1649 /* for 6-byte r/w commands, transfer length 0
1650 * means 256 blocks of data, not 0 block.
1657 if (unlikely(scmd
->cmd_len
< 16))
1659 scsi_16_lba_len(cdb
, &block
, &n_block
);
1660 if (unlikely(cdb
[1] & (1 << 3)))
1661 tf_flags
|= ATA_TFLAG_FUA
;
1664 DPRINTK("no-byte command\n");
1668 /* Check and compose ATA command */
1670 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1671 * length 0 means transfer 0 block of data.
1672 * However, for ATA R/W commands, sector count 0 means
1673 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1675 * WARNING: one or two older ATA drives treat 0 as 0...
1679 qc
->flags
|= ATA_QCFLAG_IO
;
1680 qc
->nbytes
= n_block
* scmd
->device
->sector_size
;
1682 rc
= ata_build_rw_tf(&qc
->tf
, qc
->dev
, block
, n_block
, tf_flags
,
1684 if (likely(rc
== 0))
1689 /* treat all other errors as -EINVAL, fall through */
1691 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1692 /* "Invalid field in cbd" */
1696 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1697 /* "Logical Block Address out of range" */
1701 scmd
->result
= SAM_STAT_GOOD
;
1705 static void ata_scsi_qc_complete(struct ata_queued_cmd
*qc
)
1707 struct ata_port
*ap
= qc
->ap
;
1708 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1709 u8
*cdb
= cmd
->cmnd
;
1710 int need_sense
= (qc
->err_mask
!= 0);
1712 /* For ATA pass thru (SAT) commands, generate a sense block if
1713 * user mandated it or if there's an error. Note that if we
1714 * generate because the user forced us to, a check condition
1715 * is generated and the ATA register values are returned
1716 * whether the command completed successfully or not. If there
1717 * was no error, SK, ASC and ASCQ will all be zero.
1719 if (((cdb
[0] == ATA_16
) || (cdb
[0] == ATA_12
)) &&
1720 ((cdb
[2] & 0x20) || need_sense
)) {
1721 ata_gen_passthru_sense(qc
);
1724 cmd
->result
= SAM_STAT_GOOD
;
1726 /* TODO: decide which descriptor format to use
1727 * for 48b LBA devices and call that here
1728 * instead of the fixed desc, which is only
1729 * good for smaller LBA (and maybe CHS?)
1732 ata_gen_ata_sense(qc
);
1736 if (need_sense
&& !ap
->ops
->error_handler
)
1737 ata_dump_status(ap
->print_id
, &qc
->result_tf
);
1745 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1746 * @dev: ATA device to which the command is addressed
1747 * @cmd: SCSI command to execute
1748 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1750 * Our ->queuecommand() function has decided that the SCSI
1751 * command issued can be directly translated into an ATA
1752 * command, rather than handled internally.
1754 * This function sets up an ata_queued_cmd structure for the
1755 * SCSI command, and sends that ata_queued_cmd to the hardware.
1757 * The xlat_func argument (actor) returns 0 if ready to execute
1758 * ATA command, else 1 to finish translation. If 1 is returned
1759 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1760 * to be set reflecting an error condition or clean (early)
1764 * spin_lock_irqsave(host lock)
1767 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1768 * needs to be deferred.
1770 static int ata_scsi_translate(struct ata_device
*dev
, struct scsi_cmnd
*cmd
,
1771 ata_xlat_func_t xlat_func
)
1773 struct ata_port
*ap
= dev
->link
->ap
;
1774 struct ata_queued_cmd
*qc
;
1779 qc
= ata_scsi_qc_new(dev
, cmd
);
1783 /* data is present; dma-map it */
1784 if (cmd
->sc_data_direction
== DMA_FROM_DEVICE
||
1785 cmd
->sc_data_direction
== DMA_TO_DEVICE
) {
1786 if (unlikely(scsi_bufflen(cmd
) < 1)) {
1787 ata_dev_warn(dev
, "WARNING: zero len r/w req\n");
1791 ata_sg_init(qc
, scsi_sglist(cmd
), scsi_sg_count(cmd
));
1793 qc
->dma_dir
= cmd
->sc_data_direction
;
1796 qc
->complete_fn
= ata_scsi_qc_complete
;
1801 if (ap
->ops
->qc_defer
) {
1802 if ((rc
= ap
->ops
->qc_defer(qc
)))
1806 /* select device, send command to hardware */
1814 cmd
->scsi_done(cmd
);
1815 DPRINTK("EXIT - early finish (good or error)\n");
1820 cmd
->result
= (DID_ERROR
<< 16);
1821 cmd
->scsi_done(cmd
);
1823 DPRINTK("EXIT - internal\n");
1828 DPRINTK("EXIT - defer\n");
1829 if (rc
== ATA_DEFER_LINK
)
1830 return SCSI_MLQUEUE_DEVICE_BUSY
;
1832 return SCSI_MLQUEUE_HOST_BUSY
;
1836 * ata_scsi_rbuf_get - Map response buffer.
1837 * @cmd: SCSI command containing buffer to be mapped.
1838 * @flags: unsigned long variable to store irq enable status
1839 * @copy_in: copy in from user buffer
1841 * Prepare buffer for simulated SCSI commands.
1844 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
1847 * Pointer to response buffer.
1849 static void *ata_scsi_rbuf_get(struct scsi_cmnd
*cmd
, bool copy_in
,
1850 unsigned long *flags
)
1852 spin_lock_irqsave(&ata_scsi_rbuf_lock
, *flags
);
1854 memset(ata_scsi_rbuf
, 0, ATA_SCSI_RBUF_SIZE
);
1856 sg_copy_to_buffer(scsi_sglist(cmd
), scsi_sg_count(cmd
),
1857 ata_scsi_rbuf
, ATA_SCSI_RBUF_SIZE
);
1858 return ata_scsi_rbuf
;
1862 * ata_scsi_rbuf_put - Unmap response buffer.
1863 * @cmd: SCSI command containing buffer to be unmapped.
1864 * @copy_out: copy out result
1865 * @flags: @flags passed to ata_scsi_rbuf_get()
1867 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1868 * @copy_back is true.
1871 * Unlocks ata_scsi_rbuf_lock.
1873 static inline void ata_scsi_rbuf_put(struct scsi_cmnd
*cmd
, bool copy_out
,
1874 unsigned long *flags
)
1877 sg_copy_from_buffer(scsi_sglist(cmd
), scsi_sg_count(cmd
),
1878 ata_scsi_rbuf
, ATA_SCSI_RBUF_SIZE
);
1879 spin_unlock_irqrestore(&ata_scsi_rbuf_lock
, *flags
);
1883 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1884 * @args: device IDENTIFY data / SCSI command of interest.
1885 * @actor: Callback hook for desired SCSI command simulator
1887 * Takes care of the hard work of simulating a SCSI command...
1888 * Mapping the response buffer, calling the command's handler,
1889 * and handling the handler's return value. This return value
1890 * indicates whether the handler wishes the SCSI command to be
1891 * completed successfully (0), or not (in which case cmd->result
1892 * and sense buffer are assumed to be set).
1895 * spin_lock_irqsave(host lock)
1897 static void ata_scsi_rbuf_fill(struct ata_scsi_args
*args
,
1898 unsigned int (*actor
)(struct ata_scsi_args
*args
, u8
*rbuf
))
1902 struct scsi_cmnd
*cmd
= args
->cmd
;
1903 unsigned long flags
;
1905 rbuf
= ata_scsi_rbuf_get(cmd
, false, &flags
);
1906 rc
= actor(args
, rbuf
);
1907 ata_scsi_rbuf_put(cmd
, rc
== 0, &flags
);
1910 cmd
->result
= SAM_STAT_GOOD
;
1915 * ata_scsiop_inq_std - Simulate INQUIRY command
1916 * @args: device IDENTIFY data / SCSI command of interest.
1917 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1919 * Returns standard device identification data associated
1920 * with non-VPD INQUIRY command output.
1923 * spin_lock_irqsave(host lock)
1925 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args
*args
, u8
*rbuf
)
1927 const u8 versions
[] = {
1928 0x60, /* SAM-3 (no version claimed) */
1931 0x20, /* SBC-2 (no version claimed) */
1934 0x60 /* SPC-3 (no version claimed) */
1939 0x5, /* claim SPC-3 version compatibility */
1946 /* set scsi removeable (RMB) bit per ata bit */
1947 if (ata_id_removeable(args
->id
))
1950 memcpy(rbuf
, hdr
, sizeof(hdr
));
1951 memcpy(&rbuf
[8], "ATA ", 8);
1952 ata_id_string(args
->id
, &rbuf
[16], ATA_ID_PROD
, 16);
1953 ata_id_string(args
->id
, &rbuf
[32], ATA_ID_FW_REV
, 4);
1955 if (rbuf
[32] == 0 || rbuf
[32] == ' ')
1956 memcpy(&rbuf
[32], "n/a ", 4);
1958 memcpy(rbuf
+ 59, versions
, sizeof(versions
));
1964 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1965 * @args: device IDENTIFY data / SCSI command of interest.
1966 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1968 * Returns list of inquiry VPD pages available.
1971 * spin_lock_irqsave(host lock)
1973 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args
*args
, u8
*rbuf
)
1975 const u8 pages
[] = {
1976 0x00, /* page 0x00, this page */
1977 0x80, /* page 0x80, unit serial no page */
1978 0x83, /* page 0x83, device ident page */
1979 0x89, /* page 0x89, ata info page */
1980 0xb0, /* page 0xb0, block limits page */
1981 0xb1, /* page 0xb1, block device characteristics page */
1982 0xb2, /* page 0xb2, thin provisioning page */
1985 rbuf
[3] = sizeof(pages
); /* number of supported VPD pages */
1986 memcpy(rbuf
+ 4, pages
, sizeof(pages
));
1991 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1992 * @args: device IDENTIFY data / SCSI command of interest.
1993 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1995 * Returns ATA device serial number.
1998 * spin_lock_irqsave(host lock)
2000 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args
*args
, u8
*rbuf
)
2004 0x80, /* this page code */
2006 ATA_ID_SERNO_LEN
, /* page len */
2009 memcpy(rbuf
, hdr
, sizeof(hdr
));
2010 ata_id_string(args
->id
, (unsigned char *) &rbuf
[4],
2011 ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
2016 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
2017 * @args: device IDENTIFY data / SCSI command of interest.
2018 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2020 * Yields two logical unit device identification designators:
2021 * - vendor specific ASCII containing the ATA serial number
2022 * - SAT defined "t10 vendor id based" containing ASCII vendor
2023 * name ("ATA "), model and serial numbers.
2026 * spin_lock_irqsave(host lock)
2028 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args
*args
, u8
*rbuf
)
2030 const int sat_model_serial_desc_len
= 68;
2033 rbuf
[1] = 0x83; /* this page code */
2036 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2038 rbuf
[num
+ 3] = ATA_ID_SERNO_LEN
;
2040 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
,
2041 ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
2042 num
+= ATA_ID_SERNO_LEN
;
2044 /* SAT defined lu model and serial numbers descriptor */
2045 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2048 rbuf
[num
+ 3] = sat_model_serial_desc_len
;
2050 memcpy(rbuf
+ num
, "ATA ", 8);
2052 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
, ATA_ID_PROD
,
2054 num
+= ATA_ID_PROD_LEN
;
2055 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
, ATA_ID_SERNO
,
2057 num
+= ATA_ID_SERNO_LEN
;
2059 if (ata_id_has_wwn(args
->id
)) {
2060 /* SAT defined lu world wide name */
2061 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
2064 rbuf
[num
+ 3] = ATA_ID_WWN_LEN
;
2066 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
,
2067 ATA_ID_WWN
, ATA_ID_WWN_LEN
);
2068 num
+= ATA_ID_WWN_LEN
;
2070 rbuf
[3] = num
- 4; /* page len (assume less than 256 bytes) */
2075 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2076 * @args: device IDENTIFY data / SCSI command of interest.
2077 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2079 * Yields SAT-specified ATA VPD page.
2082 * spin_lock_irqsave(host lock)
2084 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args
*args
, u8
*rbuf
)
2086 struct ata_taskfile tf
;
2088 memset(&tf
, 0, sizeof(tf
));
2090 rbuf
[1] = 0x89; /* our page code */
2091 rbuf
[2] = (0x238 >> 8); /* page size fixed at 238h */
2092 rbuf
[3] = (0x238 & 0xff);
2094 memcpy(&rbuf
[8], "linux ", 8);
2095 memcpy(&rbuf
[16], "libata ", 16);
2096 memcpy(&rbuf
[32], DRV_VERSION
, 4);
2097 ata_id_string(args
->id
, &rbuf
[32], ATA_ID_FW_REV
, 4);
2099 /* we don't store the ATA device signature, so we fake it */
2101 tf
.command
= ATA_DRDY
; /* really, this is Status reg */
2105 ata_tf_to_fis(&tf
, 0, 1, &rbuf
[36]); /* TODO: PMP? */
2106 rbuf
[36] = 0x34; /* force D2H Reg FIS (34h) */
2108 rbuf
[56] = ATA_CMD_ID_ATA
;
2110 memcpy(&rbuf
[60], &args
->id
[0], 512);
2114 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args
*args
, u8
*rbuf
)
2119 rbuf
[3] = 0x3c; /* required VPD size with unmap support */
2122 * Optimal transfer length granularity.
2124 * This is always one physical block, but for disks with a smaller
2125 * logical than physical sector size we need to figure out what the
2128 min_io_sectors
= 1 << ata_id_log2_per_physical_sector(args
->id
);
2129 put_unaligned_be16(min_io_sectors
, &rbuf
[6]);
2132 * Optimal unmap granularity.
2134 * The ATA spec doesn't even know about a granularity or alignment
2135 * for the TRIM command. We can leave away most of the unmap related
2136 * VPD page entries, but we have specifify a granularity to signal
2137 * that we support some form of unmap - in thise case via WRITE SAME
2138 * with the unmap bit set.
2140 if (ata_id_has_trim(args
->id
)) {
2141 put_unaligned_be64(65535 * 512 / 8, &rbuf
[36]);
2142 put_unaligned_be32(1, &rbuf
[28]);
2148 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args
*args
, u8
*rbuf
)
2150 int form_factor
= ata_id_form_factor(args
->id
);
2151 int media_rotation_rate
= ata_id_rotation_rate(args
->id
);
2155 rbuf
[4] = media_rotation_rate
>> 8;
2156 rbuf
[5] = media_rotation_rate
;
2157 rbuf
[7] = form_factor
;
2162 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args
*args
, u8
*rbuf
)
2164 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2167 rbuf
[5] = 1 << 6; /* TPWS */
2173 * ata_scsiop_noop - Command handler that simply returns success.
2174 * @args: device IDENTIFY data / SCSI command of interest.
2175 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2177 * No operation. Simply returns success to caller, to indicate
2178 * that the caller should successfully complete this SCSI command.
2181 * spin_lock_irqsave(host lock)
2183 static unsigned int ata_scsiop_noop(struct ata_scsi_args
*args
, u8
*rbuf
)
2190 * ata_msense_caching - Simulate MODE SENSE caching info page
2191 * @id: device IDENTIFY data
2192 * @buf: output buffer
2194 * Generate a caching info page, which conditionally indicates
2195 * write caching to the SCSI layer, depending on device
2201 static unsigned int ata_msense_caching(u16
*id
, u8
*buf
)
2203 memcpy(buf
, def_cache_mpage
, sizeof(def_cache_mpage
));
2204 if (ata_id_wcache_enabled(id
))
2205 buf
[2] |= (1 << 2); /* write cache enable */
2206 if (!ata_id_rahead_enabled(id
))
2207 buf
[12] |= (1 << 5); /* disable read ahead */
2208 return sizeof(def_cache_mpage
);
2212 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
2213 * @buf: output buffer
2215 * Generate a generic MODE SENSE control mode page.
2220 static unsigned int ata_msense_ctl_mode(u8
*buf
)
2222 memcpy(buf
, def_control_mpage
, sizeof(def_control_mpage
));
2223 return sizeof(def_control_mpage
);
2227 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2228 * @buf: output buffer
2230 * Generate a generic MODE SENSE r/w error recovery page.
2235 static unsigned int ata_msense_rw_recovery(u8
*buf
)
2237 memcpy(buf
, def_rw_recovery_mpage
, sizeof(def_rw_recovery_mpage
));
2238 return sizeof(def_rw_recovery_mpage
);
2242 * We can turn this into a real blacklist if it's needed, for now just
2243 * blacklist any Maxtor BANC1G10 revision firmware
2245 static int ata_dev_supports_fua(u16
*id
)
2247 unsigned char model
[ATA_ID_PROD_LEN
+ 1], fw
[ATA_ID_FW_REV_LEN
+ 1];
2251 if (!ata_id_has_fua(id
))
2254 ata_id_c_string(id
, model
, ATA_ID_PROD
, sizeof(model
));
2255 ata_id_c_string(id
, fw
, ATA_ID_FW_REV
, sizeof(fw
));
2257 if (strcmp(model
, "Maxtor"))
2259 if (strcmp(fw
, "BANC1G10"))
2262 return 0; /* blacklisted */
2266 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2267 * @args: device IDENTIFY data / SCSI command of interest.
2268 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2270 * Simulate MODE SENSE commands. Assume this is invoked for direct
2271 * access devices (e.g. disks) only. There should be no block
2272 * descriptor for other device types.
2275 * spin_lock_irqsave(host lock)
2277 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args
*args
, u8
*rbuf
)
2279 struct ata_device
*dev
= args
->dev
;
2280 u8
*scsicmd
= args
->cmd
->cmnd
, *p
= rbuf
;
2281 const u8 sat_blk_desc
[] = {
2282 0, 0, 0, 0, /* number of blocks: sat unspecified */
2284 0, 0x2, 0x0 /* block length: 512 bytes */
2287 unsigned int ebd
, page_control
, six_byte
;
2292 six_byte
= (scsicmd
[0] == MODE_SENSE
);
2293 ebd
= !(scsicmd
[1] & 0x8); /* dbd bit inverted == edb */
2295 * LLBA bit in msense(10) ignored (compliant)
2298 page_control
= scsicmd
[2] >> 6;
2299 switch (page_control
) {
2300 case 0: /* current */
2301 break; /* supported */
2303 goto saving_not_supp
;
2304 case 1: /* changeable */
2305 case 2: /* defaults */
2311 p
+= 4 + (ebd
? 8 : 0);
2313 p
+= 8 + (ebd
? 8 : 0);
2315 pg
= scsicmd
[2] & 0x3f;
2318 * No mode subpages supported (yet) but asking for _all_
2319 * subpages may be valid
2321 if (spg
&& (spg
!= ALL_SUB_MPAGES
))
2325 case RW_RECOVERY_MPAGE
:
2326 p
+= ata_msense_rw_recovery(p
);
2330 p
+= ata_msense_caching(args
->id
, p
);
2334 p
+= ata_msense_ctl_mode(p
);
2338 p
+= ata_msense_rw_recovery(p
);
2339 p
+= ata_msense_caching(args
->id
, p
);
2340 p
+= ata_msense_ctl_mode(p
);
2343 default: /* invalid page code */
2348 if (ata_dev_supports_fua(args
->id
) && (dev
->flags
& ATA_DFLAG_LBA48
) &&
2349 (!(dev
->flags
& ATA_DFLAG_PIO
) || dev
->multi_count
))
2353 rbuf
[0] = p
- rbuf
- 1;
2356 rbuf
[3] = sizeof(sat_blk_desc
);
2357 memcpy(rbuf
+ 4, sat_blk_desc
, sizeof(sat_blk_desc
));
2360 unsigned int output_len
= p
- rbuf
- 2;
2362 rbuf
[0] = output_len
>> 8;
2363 rbuf
[1] = output_len
;
2366 rbuf
[7] = sizeof(sat_blk_desc
);
2367 memcpy(rbuf
+ 8, sat_blk_desc
, sizeof(sat_blk_desc
));
2373 ata_scsi_set_sense(args
->cmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
2374 /* "Invalid field in cbd" */
2378 ata_scsi_set_sense(args
->cmd
, ILLEGAL_REQUEST
, 0x39, 0x0);
2379 /* "Saving parameters not supported" */
2384 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2385 * @args: device IDENTIFY data / SCSI command of interest.
2386 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2388 * Simulate READ CAPACITY commands.
2393 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args
*args
, u8
*rbuf
)
2395 struct ata_device
*dev
= args
->dev
;
2396 u64 last_lba
= dev
->n_sectors
- 1; /* LBA of the last block */
2397 u32 sector_size
; /* physical sector size in bytes */
2401 sector_size
= ata_id_logical_sector_size(dev
->id
);
2402 log2_per_phys
= ata_id_log2_per_physical_sector(dev
->id
);
2403 lowest_aligned
= ata_id_logical_sector_offset(dev
->id
, log2_per_phys
);
2407 if (args
->cmd
->cmnd
[0] == READ_CAPACITY
) {
2408 if (last_lba
>= 0xffffffffULL
)
2409 last_lba
= 0xffffffff;
2411 /* sector count, 32-bit */
2412 rbuf
[0] = last_lba
>> (8 * 3);
2413 rbuf
[1] = last_lba
>> (8 * 2);
2414 rbuf
[2] = last_lba
>> (8 * 1);
2418 rbuf
[4] = sector_size
>> (8 * 3);
2419 rbuf
[5] = sector_size
>> (8 * 2);
2420 rbuf
[6] = sector_size
>> (8 * 1);
2421 rbuf
[7] = sector_size
;
2423 /* sector count, 64-bit */
2424 rbuf
[0] = last_lba
>> (8 * 7);
2425 rbuf
[1] = last_lba
>> (8 * 6);
2426 rbuf
[2] = last_lba
>> (8 * 5);
2427 rbuf
[3] = last_lba
>> (8 * 4);
2428 rbuf
[4] = last_lba
>> (8 * 3);
2429 rbuf
[5] = last_lba
>> (8 * 2);
2430 rbuf
[6] = last_lba
>> (8 * 1);
2434 rbuf
[ 8] = sector_size
>> (8 * 3);
2435 rbuf
[ 9] = sector_size
>> (8 * 2);
2436 rbuf
[10] = sector_size
>> (8 * 1);
2437 rbuf
[11] = sector_size
;
2440 rbuf
[13] = log2_per_phys
;
2441 rbuf
[14] = (lowest_aligned
>> 8) & 0x3f;
2442 rbuf
[15] = lowest_aligned
;
2444 if (ata_id_has_trim(args
->id
)) {
2445 rbuf
[14] |= 0x80; /* TPE */
2447 if (ata_id_has_zero_after_trim(args
->id
))
2448 rbuf
[14] |= 0x40; /* TPRZ */
2456 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2457 * @args: device IDENTIFY data / SCSI command of interest.
2458 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2460 * Simulate REPORT LUNS command.
2463 * spin_lock_irqsave(host lock)
2465 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args
*args
, u8
*rbuf
)
2468 rbuf
[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2473 static void atapi_sense_complete(struct ata_queued_cmd
*qc
)
2475 if (qc
->err_mask
&& ((qc
->err_mask
& AC_ERR_DEV
) == 0)) {
2476 /* FIXME: not quite right; we don't want the
2477 * translation of taskfile registers into
2478 * a sense descriptors, since that's only
2479 * correct for ATA, not ATAPI
2481 ata_gen_passthru_sense(qc
);
2484 qc
->scsidone(qc
->scsicmd
);
2488 /* is it pointless to prefer PIO for "safety reasons"? */
2489 static inline int ata_pio_use_silly(struct ata_port
*ap
)
2491 return (ap
->flags
& ATA_FLAG_PIO_DMA
);
2494 static void atapi_request_sense(struct ata_queued_cmd
*qc
)
2496 struct ata_port
*ap
= qc
->ap
;
2497 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2499 DPRINTK("ATAPI request sense\n");
2501 /* FIXME: is this needed? */
2502 memset(cmd
->sense_buffer
, 0, SCSI_SENSE_BUFFERSIZE
);
2504 #ifdef CONFIG_ATA_SFF
2505 if (ap
->ops
->sff_tf_read
)
2506 ap
->ops
->sff_tf_read(ap
, &qc
->tf
);
2509 /* fill these in, for the case where they are -not- overwritten */
2510 cmd
->sense_buffer
[0] = 0x70;
2511 cmd
->sense_buffer
[2] = qc
->tf
.feature
>> 4;
2515 /* setup sg table and init transfer direction */
2516 sg_init_one(&qc
->sgent
, cmd
->sense_buffer
, SCSI_SENSE_BUFFERSIZE
);
2517 ata_sg_init(qc
, &qc
->sgent
, 1);
2518 qc
->dma_dir
= DMA_FROM_DEVICE
;
2520 memset(&qc
->cdb
, 0, qc
->dev
->cdb_len
);
2521 qc
->cdb
[0] = REQUEST_SENSE
;
2522 qc
->cdb
[4] = SCSI_SENSE_BUFFERSIZE
;
2524 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2525 qc
->tf
.command
= ATA_CMD_PACKET
;
2527 if (ata_pio_use_silly(ap
)) {
2528 qc
->tf
.protocol
= ATAPI_PROT_DMA
;
2529 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
2531 qc
->tf
.protocol
= ATAPI_PROT_PIO
;
2532 qc
->tf
.lbam
= SCSI_SENSE_BUFFERSIZE
;
2535 qc
->nbytes
= SCSI_SENSE_BUFFERSIZE
;
2537 qc
->complete_fn
= atapi_sense_complete
;
2544 static void atapi_qc_complete(struct ata_queued_cmd
*qc
)
2546 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2547 unsigned int err_mask
= qc
->err_mask
;
2549 VPRINTK("ENTER, err_mask 0x%X\n", err_mask
);
2551 /* handle completion from new EH */
2552 if (unlikely(qc
->ap
->ops
->error_handler
&&
2553 (err_mask
|| qc
->flags
& ATA_QCFLAG_SENSE_VALID
))) {
2555 if (!(qc
->flags
& ATA_QCFLAG_SENSE_VALID
)) {
2556 /* FIXME: not quite right; we don't want the
2557 * translation of taskfile registers into a
2558 * sense descriptors, since that's only
2559 * correct for ATA, not ATAPI
2561 ata_gen_passthru_sense(qc
);
2564 /* SCSI EH automatically locks door if sdev->locked is
2565 * set. Sometimes door lock request continues to
2566 * fail, for example, when no media is present. This
2567 * creates a loop - SCSI EH issues door lock which
2568 * fails and gets invoked again to acquire sense data
2569 * for the failed command.
2571 * If door lock fails, always clear sdev->locked to
2572 * avoid this infinite loop.
2574 * This may happen before SCSI scan is complete. Make
2575 * sure qc->dev->sdev isn't NULL before dereferencing.
2577 if (qc
->cdb
[0] == ALLOW_MEDIUM_REMOVAL
&& qc
->dev
->sdev
)
2578 qc
->dev
->sdev
->locked
= 0;
2580 qc
->scsicmd
->result
= SAM_STAT_CHECK_CONDITION
;
2586 /* successful completion or old EH failure path */
2587 if (unlikely(err_mask
& AC_ERR_DEV
)) {
2588 cmd
->result
= SAM_STAT_CHECK_CONDITION
;
2589 atapi_request_sense(qc
);
2591 } else if (unlikely(err_mask
)) {
2592 /* FIXME: not quite right; we don't want the
2593 * translation of taskfile registers into
2594 * a sense descriptors, since that's only
2595 * correct for ATA, not ATAPI
2597 ata_gen_passthru_sense(qc
);
2599 u8
*scsicmd
= cmd
->cmnd
;
2601 if ((scsicmd
[0] == INQUIRY
) && ((scsicmd
[1] & 0x03) == 0)) {
2602 unsigned long flags
;
2605 buf
= ata_scsi_rbuf_get(cmd
, true, &flags
);
2607 /* ATAPI devices typically report zero for their SCSI version,
2608 * and sometimes deviate from the spec WRT response data
2609 * format. If SCSI version is reported as zero like normal,
2610 * then we make the following fixups: 1) Fake MMC-5 version,
2611 * to indicate to the Linux scsi midlayer this is a modern
2612 * device. 2) Ensure response data format / ATAPI information
2613 * are always correct.
2620 ata_scsi_rbuf_put(cmd
, true, &flags
);
2623 cmd
->result
= SAM_STAT_GOOD
;
2630 * atapi_xlat - Initialize PACKET taskfile
2631 * @qc: command structure to be initialized
2634 * spin_lock_irqsave(host lock)
2637 * Zero on success, non-zero on failure.
2639 static unsigned int atapi_xlat(struct ata_queued_cmd
*qc
)
2641 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
2642 struct ata_device
*dev
= qc
->dev
;
2643 int nodata
= (scmd
->sc_data_direction
== DMA_NONE
);
2644 int using_pio
= !nodata
&& (dev
->flags
& ATA_DFLAG_PIO
);
2645 unsigned int nbytes
;
2647 memset(qc
->cdb
, 0, dev
->cdb_len
);
2648 memcpy(qc
->cdb
, scmd
->cmnd
, scmd
->cmd_len
);
2650 qc
->complete_fn
= atapi_qc_complete
;
2652 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2653 if (scmd
->sc_data_direction
== DMA_TO_DEVICE
) {
2654 qc
->tf
.flags
|= ATA_TFLAG_WRITE
;
2655 DPRINTK("direction: write\n");
2658 qc
->tf
.command
= ATA_CMD_PACKET
;
2659 ata_qc_set_pc_nbytes(qc
);
2661 /* check whether ATAPI DMA is safe */
2662 if (!nodata
&& !using_pio
&& atapi_check_dma(qc
))
2665 /* Some controller variants snoop this value for Packet
2666 * transfers to do state machine and FIFO management. Thus we
2667 * want to set it properly, and for DMA where it is
2668 * effectively meaningless.
2670 nbytes
= min(ata_qc_raw_nbytes(qc
), (unsigned int)63 * 1024);
2672 /* Most ATAPI devices which honor transfer chunk size don't
2673 * behave according to the spec when odd chunk size which
2674 * matches the transfer length is specified. If the number of
2675 * bytes to transfer is 2n+1. According to the spec, what
2676 * should happen is to indicate that 2n+1 is going to be
2677 * transferred and transfer 2n+2 bytes where the last byte is
2680 * In practice, this doesn't happen. ATAPI devices first
2681 * indicate and transfer 2n bytes and then indicate and
2682 * transfer 2 bytes where the last byte is padding.
2684 * This inconsistency confuses several controllers which
2685 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2686 * These controllers use actual number of transferred bytes to
2687 * update DMA poitner and transfer of 4n+2 bytes make those
2688 * controller push DMA pointer by 4n+4 bytes because SATA data
2689 * FISes are aligned to 4 bytes. This causes data corruption
2690 * and buffer overrun.
2692 * Always setting nbytes to even number solves this problem
2693 * because then ATAPI devices don't have to split data at 2n
2699 qc
->tf
.lbam
= (nbytes
& 0xFF);
2700 qc
->tf
.lbah
= (nbytes
>> 8);
2703 qc
->tf
.protocol
= ATAPI_PROT_NODATA
;
2705 qc
->tf
.protocol
= ATAPI_PROT_PIO
;
2708 qc
->tf
.protocol
= ATAPI_PROT_DMA
;
2709 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
2711 if ((dev
->flags
& ATA_DFLAG_DMADIR
) &&
2712 (scmd
->sc_data_direction
!= DMA_TO_DEVICE
))
2713 /* some SATA bridges need us to indicate data xfer direction */
2714 qc
->tf
.feature
|= ATAPI_DMADIR
;
2718 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2719 as ATAPI tape drives don't get this right otherwise */
2723 static struct ata_device
*ata_find_dev(struct ata_port
*ap
, int devno
)
2725 if (!sata_pmp_attached(ap
)) {
2726 if (likely(devno
< ata_link_max_devices(&ap
->link
)))
2727 return &ap
->link
.device
[devno
];
2729 if (likely(devno
< ap
->nr_pmp_links
))
2730 return &ap
->pmp_link
[devno
].device
[0];
2736 static struct ata_device
*__ata_scsi_find_dev(struct ata_port
*ap
,
2737 const struct scsi_device
*scsidev
)
2741 /* skip commands not addressed to targets we simulate */
2742 if (!sata_pmp_attached(ap
)) {
2743 if (unlikely(scsidev
->channel
|| scsidev
->lun
))
2745 devno
= scsidev
->id
;
2747 if (unlikely(scsidev
->id
|| scsidev
->lun
))
2749 devno
= scsidev
->channel
;
2752 return ata_find_dev(ap
, devno
);
2756 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2757 * @ap: ATA port to which the device is attached
2758 * @scsidev: SCSI device from which we derive the ATA device
2760 * Given various information provided in struct scsi_cmnd,
2761 * map that onto an ATA bus, and using that mapping
2762 * determine which ata_device is associated with the
2763 * SCSI command to be sent.
2766 * spin_lock_irqsave(host lock)
2769 * Associated ATA device, or %NULL if not found.
2771 static struct ata_device
*
2772 ata_scsi_find_dev(struct ata_port
*ap
, const struct scsi_device
*scsidev
)
2774 struct ata_device
*dev
= __ata_scsi_find_dev(ap
, scsidev
);
2776 if (unlikely(!dev
|| !ata_dev_enabled(dev
)))
2783 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2784 * @byte1: Byte 1 from pass-thru CDB.
2787 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2790 ata_scsi_map_proto(u8 byte1
)
2792 switch((byte1
& 0x1e) >> 1) {
2793 case 3: /* Non-data */
2794 return ATA_PROT_NODATA
;
2797 case 10: /* UDMA Data-in */
2798 case 11: /* UDMA Data-Out */
2799 return ATA_PROT_DMA
;
2801 case 4: /* PIO Data-in */
2802 case 5: /* PIO Data-out */
2803 return ATA_PROT_PIO
;
2805 case 0: /* Hard Reset */
2807 case 8: /* Device Diagnostic */
2808 case 9: /* Device Reset */
2809 case 7: /* DMA Queued */
2810 case 12: /* FPDMA */
2811 case 15: /* Return Response Info */
2812 default: /* Reserved */
2816 return ATA_PROT_UNKNOWN
;
2820 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2821 * @qc: command structure to be initialized
2823 * Handles either 12 or 16-byte versions of the CDB.
2826 * Zero on success, non-zero on failure.
2828 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd
*qc
)
2830 struct ata_taskfile
*tf
= &(qc
->tf
);
2831 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
2832 struct ata_device
*dev
= qc
->dev
;
2833 const u8
*cdb
= scmd
->cmnd
;
2835 if ((tf
->protocol
= ata_scsi_map_proto(cdb
[1])) == ATA_PROT_UNKNOWN
)
2839 * 12 and 16 byte CDBs use different offsets to
2840 * provide the various register values.
2842 if (cdb
[0] == ATA_16
) {
2844 * 16-byte CDB - may contain extended commands.
2846 * If that is the case, copy the upper byte register values.
2848 if (cdb
[1] & 0x01) {
2849 tf
->hob_feature
= cdb
[3];
2850 tf
->hob_nsect
= cdb
[5];
2851 tf
->hob_lbal
= cdb
[7];
2852 tf
->hob_lbam
= cdb
[9];
2853 tf
->hob_lbah
= cdb
[11];
2854 tf
->flags
|= ATA_TFLAG_LBA48
;
2856 tf
->flags
&= ~ATA_TFLAG_LBA48
;
2859 * Always copy low byte, device and command registers.
2861 tf
->feature
= cdb
[4];
2866 tf
->device
= cdb
[13];
2867 tf
->command
= cdb
[14];
2870 * 12-byte CDB - incapable of extended commands.
2872 tf
->flags
&= ~ATA_TFLAG_LBA48
;
2874 tf
->feature
= cdb
[3];
2879 tf
->device
= cdb
[8];
2880 tf
->command
= cdb
[9];
2883 /* enforce correct master/slave bit */
2884 tf
->device
= dev
->devno
?
2885 tf
->device
| ATA_DEV1
: tf
->device
& ~ATA_DEV1
;
2887 switch (tf
->command
) {
2888 /* READ/WRITE LONG use a non-standard sect_size */
2889 case ATA_CMD_READ_LONG
:
2890 case ATA_CMD_READ_LONG_ONCE
:
2891 case ATA_CMD_WRITE_LONG
:
2892 case ATA_CMD_WRITE_LONG_ONCE
:
2893 if (tf
->protocol
!= ATA_PROT_PIO
|| tf
->nsect
!= 1)
2895 qc
->sect_size
= scsi_bufflen(scmd
);
2898 /* commands using reported Logical Block size (e.g. 512 or 4K) */
2899 case ATA_CMD_CFA_WRITE_NE
:
2900 case ATA_CMD_CFA_TRANS_SECT
:
2901 case ATA_CMD_CFA_WRITE_MULT_NE
:
2902 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
2904 case ATA_CMD_READ_EXT
:
2905 case ATA_CMD_READ_QUEUED
:
2906 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
2907 case ATA_CMD_FPDMA_READ
:
2908 case ATA_CMD_READ_MULTI
:
2909 case ATA_CMD_READ_MULTI_EXT
:
2910 case ATA_CMD_PIO_READ
:
2911 case ATA_CMD_PIO_READ_EXT
:
2912 case ATA_CMD_READ_STREAM_DMA_EXT
:
2913 case ATA_CMD_READ_STREAM_EXT
:
2914 case ATA_CMD_VERIFY
:
2915 case ATA_CMD_VERIFY_EXT
:
2917 case ATA_CMD_WRITE_EXT
:
2918 case ATA_CMD_WRITE_FUA_EXT
:
2919 case ATA_CMD_WRITE_QUEUED
:
2920 case ATA_CMD_WRITE_QUEUED_FUA_EXT
:
2921 case ATA_CMD_FPDMA_WRITE
:
2922 case ATA_CMD_WRITE_MULTI
:
2923 case ATA_CMD_WRITE_MULTI_EXT
:
2924 case ATA_CMD_WRITE_MULTI_FUA_EXT
:
2925 case ATA_CMD_PIO_WRITE
:
2926 case ATA_CMD_PIO_WRITE_EXT
:
2927 case ATA_CMD_WRITE_STREAM_DMA_EXT
:
2928 case ATA_CMD_WRITE_STREAM_EXT
:
2929 qc
->sect_size
= scmd
->device
->sector_size
;
2932 /* Everything else uses 512 byte "sectors" */
2934 qc
->sect_size
= ATA_SECT_SIZE
;
2938 * Set flags so that all registers will be written, pass on
2939 * write indication (used for PIO/DMA setup), result TF is
2940 * copied back and we don't whine too much about its failure.
2942 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2943 if (scmd
->sc_data_direction
== DMA_TO_DEVICE
)
2944 tf
->flags
|= ATA_TFLAG_WRITE
;
2946 qc
->flags
|= ATA_QCFLAG_RESULT_TF
| ATA_QCFLAG_QUIET
;
2949 * Set transfer length.
2951 * TODO: find out if we need to do more here to
2952 * cover scatter/gather case.
2954 ata_qc_set_pc_nbytes(qc
);
2956 /* We may not issue DMA commands if no DMA mode is set */
2957 if (tf
->protocol
== ATA_PROT_DMA
&& dev
->dma_mode
== 0)
2960 /* sanity check for pio multi commands */
2961 if ((cdb
[1] & 0xe0) && !is_multi_taskfile(tf
))
2964 if (is_multi_taskfile(tf
)) {
2965 unsigned int multi_count
= 1 << (cdb
[1] >> 5);
2967 /* compare the passed through multi_count
2968 * with the cached multi_count of libata
2970 if (multi_count
!= dev
->multi_count
)
2971 ata_dev_warn(dev
, "invalid multi_count %u ignored\n",
2976 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2977 * SET_FEATURES - XFER MODE must be preceded/succeeded
2978 * by an update to hardware-specific registers for each
2979 * controller (i.e. the reason for ->set_piomode(),
2980 * ->set_dmamode(), and ->post_set_mode() hooks).
2982 if (tf
->command
== ATA_CMD_SET_FEATURES
&&
2983 tf
->feature
== SETFEATURES_XFER
)
2987 * Filter TPM commands by default. These provide an
2988 * essentially uncontrolled encrypted "back door" between
2989 * applications and the disk. Set libata.allow_tpm=1 if you
2990 * have a real reason for wanting to use them. This ensures
2991 * that installed software cannot easily mess stuff up without
2992 * user intent. DVR type users will probably ship with this enabled
2993 * for movie content management.
2995 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
2996 * for this and should do in future but that it is not sufficient as
2997 * DCS is an optional feature set. Thus we also do the software filter
2998 * so that we comply with the TC consortium stated goal that the user
2999 * can turn off TC features of their system.
3001 if (tf
->command
>= 0x5C && tf
->command
<= 0x5F && !libata_allow_tpm
)
3007 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x00);
3008 /* "Invalid field in cdb" */
3012 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd
*qc
)
3014 struct ata_taskfile
*tf
= &qc
->tf
;
3015 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
3016 struct ata_device
*dev
= qc
->dev
;
3017 const u8
*cdb
= scmd
->cmnd
;
3023 /* we may not issue DMA commands if no DMA mode is set */
3024 if (unlikely(!dev
->dma_mode
))
3027 if (unlikely(scmd
->cmd_len
< 16))
3029 scsi_16_lba_len(cdb
, &block
, &n_block
);
3031 /* for now we only support WRITE SAME with the unmap bit set */
3032 if (unlikely(!(cdb
[1] & 0x8)))
3036 * WRITE SAME always has a sector sized buffer as payload, this
3037 * should never be a multiple entry S/G list.
3039 if (!scsi_sg_count(scmd
))
3042 buf
= page_address(sg_page(scsi_sglist(scmd
)));
3043 size
= ata_set_lba_range_entries(buf
, 512, block
, n_block
);
3045 tf
->protocol
= ATA_PROT_DMA
;
3046 tf
->hob_feature
= 0;
3047 tf
->feature
= ATA_DSM_TRIM
;
3048 tf
->hob_nsect
= (size
/ 512) >> 8;
3049 tf
->nsect
= size
/ 512;
3050 tf
->command
= ATA_CMD_DSM
;
3051 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_LBA48
|
3054 ata_qc_set_pc_nbytes(qc
);
3059 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x00);
3060 /* "Invalid field in cdb" */
3065 * ata_get_xlat_func - check if SCSI to ATA translation is possible
3067 * @cmd: SCSI command opcode to consider
3069 * Look up the SCSI command given, and determine whether the
3070 * SCSI command is to be translated or simulated.
3073 * Pointer to translation function if possible, %NULL if not.
3076 static inline ata_xlat_func_t
ata_get_xlat_func(struct ata_device
*dev
, u8 cmd
)
3086 return ata_scsi_rw_xlat
;
3089 return ata_scsi_write_same_xlat
;
3091 case SYNCHRONIZE_CACHE
:
3092 if (ata_try_flush_cache(dev
))
3093 return ata_scsi_flush_xlat
;
3098 return ata_scsi_verify_xlat
;
3102 return ata_scsi_pass_thru
;
3105 return ata_scsi_start_stop_xlat
;
3112 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
3113 * @ap: ATA port to which the command was being sent
3114 * @cmd: SCSI command to dump
3116 * Prints the contents of a SCSI command via printk().
3119 static inline void ata_scsi_dump_cdb(struct ata_port
*ap
,
3120 struct scsi_cmnd
*cmd
)
3123 struct scsi_device
*scsidev
= cmd
->device
;
3124 u8
*scsicmd
= cmd
->cmnd
;
3126 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
3128 scsidev
->channel
, scsidev
->id
, scsidev
->lun
,
3129 scsicmd
[0], scsicmd
[1], scsicmd
[2], scsicmd
[3],
3130 scsicmd
[4], scsicmd
[5], scsicmd
[6], scsicmd
[7],
3135 static inline int __ata_scsi_queuecmd(struct scsi_cmnd
*scmd
,
3136 struct ata_device
*dev
)
3138 u8 scsi_op
= scmd
->cmnd
[0];
3139 ata_xlat_func_t xlat_func
;
3142 if (dev
->class == ATA_DEV_ATA
) {
3143 if (unlikely(!scmd
->cmd_len
|| scmd
->cmd_len
> dev
->cdb_len
))
3146 xlat_func
= ata_get_xlat_func(dev
, scsi_op
);
3148 if (unlikely(!scmd
->cmd_len
))
3152 if (likely((scsi_op
!= ATA_16
) || !atapi_passthru16
)) {
3153 /* relay SCSI command to ATAPI device */
3154 int len
= COMMAND_SIZE(scsi_op
);
3155 if (unlikely(len
> scmd
->cmd_len
|| len
> dev
->cdb_len
))
3158 xlat_func
= atapi_xlat
;
3160 /* ATA_16 passthru, treat as an ATA command */
3161 if (unlikely(scmd
->cmd_len
> 16))
3164 xlat_func
= ata_get_xlat_func(dev
, scsi_op
);
3169 rc
= ata_scsi_translate(dev
, scmd
, xlat_func
);
3171 ata_scsi_simulate(dev
, scmd
);
3176 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
3177 scmd
->cmd_len
, scsi_op
, dev
->cdb_len
);
3178 scmd
->result
= DID_ERROR
<< 16;
3179 scmd
->scsi_done(scmd
);
3184 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
3185 * @shost: SCSI host of command to be sent
3186 * @cmd: SCSI command to be sent
3188 * In some cases, this function translates SCSI commands into
3189 * ATA taskfiles, and queues the taskfiles to be sent to
3190 * hardware. In other cases, this function simulates a
3191 * SCSI device by evaluating and responding to certain
3192 * SCSI commands. This creates the overall effect of
3193 * ATA and ATAPI devices appearing as SCSI devices.
3199 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3202 int ata_scsi_queuecmd(struct Scsi_Host
*shost
, struct scsi_cmnd
*cmd
)
3204 struct ata_port
*ap
;
3205 struct ata_device
*dev
;
3206 struct scsi_device
*scsidev
= cmd
->device
;
3208 unsigned long irq_flags
;
3210 ap
= ata_shost_to_port(shost
);
3212 spin_lock_irqsave(ap
->lock
, irq_flags
);
3214 ata_scsi_dump_cdb(ap
, cmd
);
3216 dev
= ata_scsi_find_dev(ap
, scsidev
);
3218 rc
= __ata_scsi_queuecmd(cmd
, dev
);
3220 cmd
->result
= (DID_BAD_TARGET
<< 16);
3221 cmd
->scsi_done(cmd
);
3224 spin_unlock_irqrestore(ap
->lock
, irq_flags
);
3230 * ata_scsi_simulate - simulate SCSI command on ATA device
3231 * @dev: the target device
3232 * @cmd: SCSI command being sent to device.
3234 * Interprets and directly executes a select list of SCSI commands
3235 * that can be handled internally.
3238 * spin_lock_irqsave(host lock)
3241 void ata_scsi_simulate(struct ata_device
*dev
, struct scsi_cmnd
*cmd
)
3243 struct ata_scsi_args args
;
3244 const u8
*scsicmd
= cmd
->cmnd
;
3250 args
.done
= cmd
->scsi_done
;
3252 switch(scsicmd
[0]) {
3253 /* TODO: worth improving? */
3255 ata_scsi_invalid_field(cmd
);
3259 if (scsicmd
[1] & 2) /* is CmdDt set? */
3260 ata_scsi_invalid_field(cmd
);
3261 else if ((scsicmd
[1] & 1) == 0) /* is EVPD clear? */
3262 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_std
);
3263 else switch (scsicmd
[2]) {
3265 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_00
);
3268 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_80
);
3271 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_83
);
3274 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_89
);
3277 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_b0
);
3280 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_b1
);
3283 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_b2
);
3286 ata_scsi_invalid_field(cmd
);
3293 ata_scsi_rbuf_fill(&args
, ata_scsiop_mode_sense
);
3296 case MODE_SELECT
: /* unconditionally return */
3297 case MODE_SELECT_10
: /* bad-field-in-cdb */
3298 ata_scsi_invalid_field(cmd
);
3302 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
3305 case SERVICE_ACTION_IN
:
3306 if ((scsicmd
[1] & 0x1f) == SAI_READ_CAPACITY_16
)
3307 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
3309 ata_scsi_invalid_field(cmd
);
3313 ata_scsi_rbuf_fill(&args
, ata_scsiop_report_luns
);
3317 ata_scsi_set_sense(cmd
, 0, 0, 0);
3318 cmd
->result
= (DRIVER_SENSE
<< 24);
3319 cmd
->scsi_done(cmd
);
3322 /* if we reach this, then writeback caching is disabled,
3323 * turning this into a no-op.
3325 case SYNCHRONIZE_CACHE
:
3328 /* no-op's, complete with success */
3332 case TEST_UNIT_READY
:
3333 ata_scsi_rbuf_fill(&args
, ata_scsiop_noop
);
3336 case SEND_DIAGNOSTIC
:
3337 tmp8
= scsicmd
[1] & ~(1 << 3);
3338 if ((tmp8
== 0x4) && (!scsicmd
[3]) && (!scsicmd
[4]))
3339 ata_scsi_rbuf_fill(&args
, ata_scsiop_noop
);
3341 ata_scsi_invalid_field(cmd
);
3344 /* all other commands */
3346 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, 0x20, 0x0);
3347 /* "Invalid command operation code" */
3348 cmd
->scsi_done(cmd
);
3353 int ata_scsi_add_hosts(struct ata_host
*host
, struct scsi_host_template
*sht
)
3357 for (i
= 0; i
< host
->n_ports
; i
++) {
3358 struct ata_port
*ap
= host
->ports
[i
];
3359 struct Scsi_Host
*shost
;
3362 shost
= scsi_host_alloc(sht
, sizeof(struct ata_port
*));
3366 *(struct ata_port
**)&shost
->hostdata
[0] = ap
;
3367 ap
->scsi_host
= shost
;
3369 shost
->transportt
= ata_scsi_transport_template
;
3370 shost
->unique_id
= ap
->print_id
;
3373 shost
->max_channel
= 1;
3374 shost
->max_cmd_len
= 16;
3376 /* Schedule policy is determined by ->qc_defer()
3377 * callback and it needs to see every deferred qc.
3378 * Set host_blocked to 1 to prevent SCSI midlayer from
3379 * automatically deferring requests.
3381 shost
->max_host_blocked
= 1;
3383 rc
= scsi_add_host(ap
->scsi_host
, ap
->host
->dev
);
3391 scsi_host_put(host
->ports
[i
]->scsi_host
);
3394 struct Scsi_Host
*shost
= host
->ports
[i
]->scsi_host
;
3396 scsi_remove_host(shost
);
3397 scsi_host_put(shost
);
3402 void ata_scsi_scan_host(struct ata_port
*ap
, int sync
)
3405 struct ata_device
*last_failed_dev
= NULL
;
3406 struct ata_link
*link
;
3407 struct ata_device
*dev
;
3410 ata_for_each_link(link
, ap
, EDGE
) {
3411 ata_for_each_dev(dev
, link
, ENABLED
) {
3412 struct scsi_device
*sdev
;
3413 int channel
= 0, id
= 0;
3418 if (ata_is_host_link(link
))
3421 channel
= link
->pmp
;
3423 sdev
= __scsi_add_device(ap
->scsi_host
, channel
, id
, 0,
3425 if (!IS_ERR(sdev
)) {
3427 scsi_device_put(sdev
);
3434 /* If we scanned while EH was in progress or allocation
3435 * failure occurred, scan would have failed silently. Check
3436 * whether all devices are attached.
3438 ata_for_each_link(link
, ap
, EDGE
) {
3439 ata_for_each_dev(dev
, link
, ENABLED
) {
3448 /* we're missing some SCSI devices */
3450 /* If caller requested synchrnous scan && we've made
3451 * any progress, sleep briefly and repeat.
3453 if (dev
!= last_failed_dev
) {
3455 last_failed_dev
= dev
;
3459 /* We might be failing to detect boot device, give it
3460 * a few more chances.
3468 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n");
3471 queue_delayed_work(system_long_wq
, &ap
->hotplug_task
,
3472 round_jiffies_relative(HZ
));
3476 * ata_scsi_offline_dev - offline attached SCSI device
3477 * @dev: ATA device to offline attached SCSI device for
3479 * This function is called from ata_eh_hotplug() and responsible
3480 * for taking the SCSI device attached to @dev offline. This
3481 * function is called with host lock which protects dev->sdev
3485 * spin_lock_irqsave(host lock)
3488 * 1 if attached SCSI device exists, 0 otherwise.
3490 int ata_scsi_offline_dev(struct ata_device
*dev
)
3493 scsi_device_set_state(dev
->sdev
, SDEV_OFFLINE
);
3500 * ata_scsi_remove_dev - remove attached SCSI device
3501 * @dev: ATA device to remove attached SCSI device for
3503 * This function is called from ata_eh_scsi_hotplug() and
3504 * responsible for removing the SCSI device attached to @dev.
3507 * Kernel thread context (may sleep).
3509 static void ata_scsi_remove_dev(struct ata_device
*dev
)
3511 struct ata_port
*ap
= dev
->link
->ap
;
3512 struct scsi_device
*sdev
;
3513 unsigned long flags
;
3515 /* Alas, we need to grab scan_mutex to ensure SCSI device
3516 * state doesn't change underneath us and thus
3517 * scsi_device_get() always succeeds. The mutex locking can
3518 * be removed if there is __scsi_device_get() interface which
3519 * increments reference counts regardless of device state.
3521 mutex_lock(&ap
->scsi_host
->scan_mutex
);
3522 spin_lock_irqsave(ap
->lock
, flags
);
3524 /* clearing dev->sdev is protected by host lock */
3529 /* If user initiated unplug races with us, sdev can go
3530 * away underneath us after the host lock and
3531 * scan_mutex are released. Hold onto it.
3533 if (scsi_device_get(sdev
) == 0) {
3534 /* The following ensures the attached sdev is
3535 * offline on return from ata_scsi_offline_dev()
3536 * regardless it wins or loses the race
3537 * against this function.
3539 scsi_device_set_state(sdev
, SDEV_OFFLINE
);
3546 spin_unlock_irqrestore(ap
->lock
, flags
);
3547 mutex_unlock(&ap
->scsi_host
->scan_mutex
);
3550 ata_dev_info(dev
, "detaching (SCSI %s)\n",
3551 dev_name(&sdev
->sdev_gendev
));
3553 scsi_remove_device(sdev
);
3554 scsi_device_put(sdev
);
3558 static void ata_scsi_handle_link_detach(struct ata_link
*link
)
3560 struct ata_port
*ap
= link
->ap
;
3561 struct ata_device
*dev
;
3563 ata_for_each_dev(dev
, link
, ALL
) {
3564 unsigned long flags
;
3566 if (!(dev
->flags
& ATA_DFLAG_DETACHED
))
3569 spin_lock_irqsave(ap
->lock
, flags
);
3570 dev
->flags
&= ~ATA_DFLAG_DETACHED
;
3571 spin_unlock_irqrestore(ap
->lock
, flags
);
3573 ata_scsi_remove_dev(dev
);
3578 * ata_scsi_media_change_notify - send media change event
3579 * @dev: Pointer to the disk device with media change event
3581 * Tell the block layer to send a media change notification
3585 * spin_lock_irqsave(host lock)
3587 void ata_scsi_media_change_notify(struct ata_device
*dev
)
3590 sdev_evt_send_simple(dev
->sdev
, SDEV_EVT_MEDIA_CHANGE
,
3595 * ata_scsi_hotplug - SCSI part of hotplug
3596 * @work: Pointer to ATA port to perform SCSI hotplug on
3598 * Perform SCSI part of hotplug. It's executed from a separate
3599 * workqueue after EH completes. This is necessary because SCSI
3600 * hot plugging requires working EH and hot unplugging is
3601 * synchronized with hot plugging with a mutex.
3604 * Kernel thread context (may sleep).
3606 void ata_scsi_hotplug(struct work_struct
*work
)
3608 struct ata_port
*ap
=
3609 container_of(work
, struct ata_port
, hotplug_task
.work
);
3612 if (ap
->pflags
& ATA_PFLAG_UNLOADING
) {
3613 DPRINTK("ENTER/EXIT - unloading\n");
3618 mutex_lock(&ap
->scsi_scan_mutex
);
3620 /* Unplug detached devices. We cannot use link iterator here
3621 * because PMP links have to be scanned even if PMP is
3622 * currently not attached. Iterate manually.
3624 ata_scsi_handle_link_detach(&ap
->link
);
3626 for (i
= 0; i
< SATA_PMP_MAX_PORTS
; i
++)
3627 ata_scsi_handle_link_detach(&ap
->pmp_link
[i
]);
3629 /* scan for new ones */
3630 ata_scsi_scan_host(ap
, 0);
3632 mutex_unlock(&ap
->scsi_scan_mutex
);
3637 * ata_scsi_user_scan - indication for user-initiated bus scan
3638 * @shost: SCSI host to scan
3639 * @channel: Channel to scan
3643 * This function is called when user explicitly requests bus
3644 * scan. Set probe pending flag and invoke EH.
3647 * SCSI layer (we don't care)
3652 int ata_scsi_user_scan(struct Scsi_Host
*shost
, unsigned int channel
,
3653 unsigned int id
, unsigned int lun
)
3655 struct ata_port
*ap
= ata_shost_to_port(shost
);
3656 unsigned long flags
;
3659 if (!ap
->ops
->error_handler
)
3662 if (lun
!= SCAN_WILD_CARD
&& lun
)
3665 if (!sata_pmp_attached(ap
)) {
3666 if (channel
!= SCAN_WILD_CARD
&& channel
)
3670 if (id
!= SCAN_WILD_CARD
&& id
)
3675 spin_lock_irqsave(ap
->lock
, flags
);
3677 if (devno
== SCAN_WILD_CARD
) {
3678 struct ata_link
*link
;
3680 ata_for_each_link(link
, ap
, EDGE
) {
3681 struct ata_eh_info
*ehi
= &link
->eh_info
;
3682 ehi
->probe_mask
|= ATA_ALL_DEVICES
;
3683 ehi
->action
|= ATA_EH_RESET
;
3686 struct ata_device
*dev
= ata_find_dev(ap
, devno
);
3689 struct ata_eh_info
*ehi
= &dev
->link
->eh_info
;
3690 ehi
->probe_mask
|= 1 << dev
->devno
;
3691 ehi
->action
|= ATA_EH_RESET
;
3697 ata_port_schedule_eh(ap
);
3698 spin_unlock_irqrestore(ap
->lock
, flags
);
3699 ata_port_wait_eh(ap
);
3701 spin_unlock_irqrestore(ap
->lock
, flags
);
3707 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
3708 * @work: Pointer to ATA port to perform scsi_rescan_device()
3710 * After ATA pass thru (SAT) commands are executed successfully,
3711 * libata need to propagate the changes to SCSI layer.
3714 * Kernel thread context (may sleep).
3716 void ata_scsi_dev_rescan(struct work_struct
*work
)
3718 struct ata_port
*ap
=
3719 container_of(work
, struct ata_port
, scsi_rescan_task
);
3720 struct ata_link
*link
;
3721 struct ata_device
*dev
;
3722 unsigned long flags
;
3724 mutex_lock(&ap
->scsi_scan_mutex
);
3725 spin_lock_irqsave(ap
->lock
, flags
);
3727 ata_for_each_link(link
, ap
, EDGE
) {
3728 ata_for_each_dev(dev
, link
, ENABLED
) {
3729 struct scsi_device
*sdev
= dev
->sdev
;
3733 if (scsi_device_get(sdev
))
3736 spin_unlock_irqrestore(ap
->lock
, flags
);
3737 scsi_rescan_device(&(sdev
->sdev_gendev
));
3738 scsi_device_put(sdev
);
3739 spin_lock_irqsave(ap
->lock
, flags
);
3743 spin_unlock_irqrestore(ap
->lock
, flags
);
3744 mutex_unlock(&ap
->scsi_scan_mutex
);
3748 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
3749 * @host: ATA host container for all SAS ports
3750 * @port_info: Information from low-level host driver
3751 * @shost: SCSI host that the scsi device is attached to
3754 * PCI/etc. bus probe sem.
3757 * ata_port pointer on success / NULL on failure.
3760 struct ata_port
*ata_sas_port_alloc(struct ata_host
*host
,
3761 struct ata_port_info
*port_info
,
3762 struct Scsi_Host
*shost
)
3764 struct ata_port
*ap
;
3766 ap
= ata_port_alloc(host
);
3771 ap
->lock
= &host
->lock
;
3772 ap
->pio_mask
= port_info
->pio_mask
;
3773 ap
->mwdma_mask
= port_info
->mwdma_mask
;
3774 ap
->udma_mask
= port_info
->udma_mask
;
3775 ap
->flags
|= port_info
->flags
;
3776 ap
->ops
= port_info
->port_ops
;
3777 ap
->cbl
= ATA_CBL_SATA
;
3781 EXPORT_SYMBOL_GPL(ata_sas_port_alloc
);
3784 * ata_sas_port_start - Set port up for dma.
3785 * @ap: Port to initialize
3787 * Called just after data structures for each port are
3790 * May be used as the port_start() entry in ata_port_operations.
3793 * Inherited from caller.
3795 int ata_sas_port_start(struct ata_port
*ap
)
3798 * the port is marked as frozen at allocation time, but if we don't
3799 * have new eh, we won't thaw it
3801 if (!ap
->ops
->error_handler
)
3802 ap
->pflags
&= ~ATA_PFLAG_FROZEN
;
3805 EXPORT_SYMBOL_GPL(ata_sas_port_start
);
3808 * ata_port_stop - Undo ata_sas_port_start()
3809 * @ap: Port to shut down
3811 * May be used as the port_stop() entry in ata_port_operations.
3814 * Inherited from caller.
3817 void ata_sas_port_stop(struct ata_port
*ap
)
3820 EXPORT_SYMBOL_GPL(ata_sas_port_stop
);
3823 * ata_sas_port_init - Initialize a SATA device
3824 * @ap: SATA port to initialize
3827 * PCI/etc. bus probe sem.
3830 * Zero on success, non-zero on error.
3833 int ata_sas_port_init(struct ata_port
*ap
)
3835 int rc
= ap
->ops
->port_start(ap
);
3838 ap
->print_id
= ata_print_id
++;
3839 rc
= ata_port_probe(ap
);
3844 EXPORT_SYMBOL_GPL(ata_sas_port_init
);
3847 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3848 * @ap: SATA port to destroy
3852 void ata_sas_port_destroy(struct ata_port
*ap
)
3854 if (ap
->ops
->port_stop
)
3855 ap
->ops
->port_stop(ap
);
3858 EXPORT_SYMBOL_GPL(ata_sas_port_destroy
);
3861 * ata_sas_slave_configure - Default slave_config routine for libata devices
3862 * @sdev: SCSI device to configure
3863 * @ap: ATA port to which SCSI device is attached
3869 int ata_sas_slave_configure(struct scsi_device
*sdev
, struct ata_port
*ap
)
3871 ata_scsi_sdev_config(sdev
);
3872 ata_scsi_dev_config(sdev
, ap
->link
.device
);
3875 EXPORT_SYMBOL_GPL(ata_sas_slave_configure
);
3878 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3879 * @cmd: SCSI command to be sent
3880 * @ap: ATA port to which the command is being sent
3883 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3887 int ata_sas_queuecmd(struct scsi_cmnd
*cmd
, struct ata_port
*ap
)
3891 ata_scsi_dump_cdb(ap
, cmd
);
3893 if (likely(ata_dev_enabled(ap
->link
.device
)))
3894 rc
= __ata_scsi_queuecmd(cmd
, ap
->link
.device
);
3896 cmd
->result
= (DID_BAD_TARGET
<< 16);
3897 cmd
->scsi_done(cmd
);
3901 EXPORT_SYMBOL_GPL(ata_sas_queuecmd
);