2 * libata-scsi.c - helper library for ATA
4 * Maintained by: Tejun Heo <tj@kernel.org>
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
*device
,
115 struct device_attribute
*attr
,
116 const char *buf
, size_t count
)
118 struct Scsi_Host
*shost
= class_to_shost(device
);
119 struct ata_port
*ap
= ata_shost_to_port(shost
);
120 struct ata_link
*link
;
121 struct ata_device
*dev
;
122 enum ata_lpm_policy policy
;
125 /* UNKNOWN is internal state, iterate from MAX_POWER */
126 for (policy
= ATA_LPM_MAX_POWER
;
127 policy
< ARRAY_SIZE(ata_lpm_policy_names
); policy
++) {
128 const char *name
= ata_lpm_policy_names
[policy
];
130 if (strncmp(name
, buf
, strlen(name
)) == 0)
133 if (policy
== ARRAY_SIZE(ata_lpm_policy_names
))
136 spin_lock_irqsave(ap
->lock
, flags
);
138 ata_for_each_link(link
, ap
, EDGE
) {
139 ata_for_each_dev(dev
, &ap
->link
, ENABLED
) {
140 if (dev
->horkage
& ATA_HORKAGE_NOLPM
) {
147 ap
->target_lpm_policy
= policy
;
148 ata_port_schedule_eh(ap
);
150 spin_unlock_irqrestore(ap
->lock
, flags
);
154 static ssize_t
ata_scsi_lpm_show(struct device
*dev
,
155 struct device_attribute
*attr
, char *buf
)
157 struct Scsi_Host
*shost
= class_to_shost(dev
);
158 struct ata_port
*ap
= ata_shost_to_port(shost
);
160 if (ap
->target_lpm_policy
>= ARRAY_SIZE(ata_lpm_policy_names
))
163 return snprintf(buf
, PAGE_SIZE
, "%s\n",
164 ata_lpm_policy_names
[ap
->target_lpm_policy
]);
166 DEVICE_ATTR(link_power_management_policy
, S_IRUGO
| S_IWUSR
,
167 ata_scsi_lpm_show
, ata_scsi_lpm_store
);
168 EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy
);
170 static ssize_t
ata_scsi_park_show(struct device
*device
,
171 struct device_attribute
*attr
, char *buf
)
173 struct scsi_device
*sdev
= to_scsi_device(device
);
175 struct ata_link
*link
;
176 struct ata_device
*dev
;
177 unsigned long flags
, now
;
178 unsigned int uninitialized_var(msecs
);
181 ap
= ata_shost_to_port(sdev
->host
);
183 spin_lock_irqsave(ap
->lock
, flags
);
184 dev
= ata_scsi_find_dev(ap
, sdev
);
189 if (dev
->flags
& ATA_DFLAG_NO_UNLOAD
) {
196 if (ap
->pflags
& ATA_PFLAG_EH_IN_PROGRESS
&&
197 link
->eh_context
.unloaded_mask
& (1 << dev
->devno
) &&
198 time_after(dev
->unpark_deadline
, now
))
199 msecs
= jiffies_to_msecs(dev
->unpark_deadline
- now
);
204 spin_unlock_irq(ap
->lock
);
206 return rc
? rc
: snprintf(buf
, 20, "%u\n", msecs
);
209 static ssize_t
ata_scsi_park_store(struct device
*device
,
210 struct device_attribute
*attr
,
211 const char *buf
, size_t len
)
213 struct scsi_device
*sdev
= to_scsi_device(device
);
215 struct ata_device
*dev
;
220 rc
= kstrtol(buf
, 10, &input
);
225 if (input
> ATA_TMOUT_MAX_PARK
) {
227 input
= ATA_TMOUT_MAX_PARK
;
230 ap
= ata_shost_to_port(sdev
->host
);
232 spin_lock_irqsave(ap
->lock
, flags
);
233 dev
= ata_scsi_find_dev(ap
, sdev
);
234 if (unlikely(!dev
)) {
238 if (dev
->class != ATA_DEV_ATA
&&
239 dev
->class != ATA_DEV_ZAC
) {
245 if (dev
->flags
& ATA_DFLAG_NO_UNLOAD
) {
250 dev
->unpark_deadline
= ata_deadline(jiffies
, input
);
251 dev
->link
->eh_info
.dev_action
[dev
->devno
] |= ATA_EH_PARK
;
252 ata_port_schedule_eh(ap
);
253 complete(&ap
->park_req_pending
);
257 dev
->flags
&= ~ATA_DFLAG_NO_UNLOAD
;
260 dev
->flags
|= ATA_DFLAG_NO_UNLOAD
;
265 spin_unlock_irqrestore(ap
->lock
, flags
);
267 return rc
? rc
: len
;
269 DEVICE_ATTR(unload_heads
, S_IRUGO
| S_IWUSR
,
270 ata_scsi_park_show
, ata_scsi_park_store
);
271 EXPORT_SYMBOL_GPL(dev_attr_unload_heads
);
273 static void ata_scsi_set_sense(struct scsi_cmnd
*cmd
, u8 sk
, u8 asc
, u8 ascq
)
275 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
277 scsi_build_sense_buffer(0, cmd
->sense_buffer
, sk
, asc
, ascq
);
281 ata_scsi_em_message_store(struct device
*dev
, struct device_attribute
*attr
,
282 const char *buf
, size_t count
)
284 struct Scsi_Host
*shost
= class_to_shost(dev
);
285 struct ata_port
*ap
= ata_shost_to_port(shost
);
286 if (ap
->ops
->em_store
&& (ap
->flags
& ATA_FLAG_EM
))
287 return ap
->ops
->em_store(ap
, buf
, count
);
292 ata_scsi_em_message_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 if (ap
->ops
->em_show
&& (ap
->flags
& ATA_FLAG_EM
))
299 return ap
->ops
->em_show(ap
, buf
);
302 DEVICE_ATTR(em_message
, S_IRUGO
| S_IWUSR
,
303 ata_scsi_em_message_show
, ata_scsi_em_message_store
);
304 EXPORT_SYMBOL_GPL(dev_attr_em_message
);
307 ata_scsi_em_message_type_show(struct device
*dev
, struct device_attribute
*attr
,
310 struct Scsi_Host
*shost
= class_to_shost(dev
);
311 struct ata_port
*ap
= ata_shost_to_port(shost
);
313 return snprintf(buf
, 23, "%d\n", ap
->em_message_type
);
315 DEVICE_ATTR(em_message_type
, S_IRUGO
,
316 ata_scsi_em_message_type_show
, NULL
);
317 EXPORT_SYMBOL_GPL(dev_attr_em_message_type
);
320 ata_scsi_activity_show(struct device
*dev
, struct device_attribute
*attr
,
323 struct scsi_device
*sdev
= to_scsi_device(dev
);
324 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
325 struct ata_device
*atadev
= ata_scsi_find_dev(ap
, sdev
);
327 if (atadev
&& ap
->ops
->sw_activity_show
&&
328 (ap
->flags
& ATA_FLAG_SW_ACTIVITY
))
329 return ap
->ops
->sw_activity_show(atadev
, buf
);
334 ata_scsi_activity_store(struct device
*dev
, struct device_attribute
*attr
,
335 const char *buf
, size_t count
)
337 struct scsi_device
*sdev
= to_scsi_device(dev
);
338 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
339 struct ata_device
*atadev
= ata_scsi_find_dev(ap
, sdev
);
340 enum sw_activity val
;
343 if (atadev
&& ap
->ops
->sw_activity_store
&&
344 (ap
->flags
& ATA_FLAG_SW_ACTIVITY
)) {
345 val
= simple_strtoul(buf
, NULL
, 0);
347 case OFF
: case BLINK_ON
: case BLINK_OFF
:
348 rc
= ap
->ops
->sw_activity_store(atadev
, val
);
357 DEVICE_ATTR(sw_activity
, S_IWUSR
| S_IRUGO
, ata_scsi_activity_show
,
358 ata_scsi_activity_store
);
359 EXPORT_SYMBOL_GPL(dev_attr_sw_activity
);
361 struct device_attribute
*ata_common_sdev_attrs
[] = {
362 &dev_attr_unload_heads
,
365 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs
);
367 static void ata_scsi_invalid_field(struct scsi_cmnd
*cmd
)
369 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
370 /* "Invalid field in cbd" */
375 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
376 * @sdev: SCSI device for which BIOS geometry is to be determined
377 * @bdev: block device associated with @sdev
378 * @capacity: capacity of SCSI device
379 * @geom: location to which geometry will be output
381 * Generic bios head/sector/cylinder calculator
382 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
383 * mapping. Some situations may arise where the disk is not
384 * bootable if this is not used.
387 * Defined by the SCSI layer. We don't really care.
392 int ata_std_bios_param(struct scsi_device
*sdev
, struct block_device
*bdev
,
393 sector_t capacity
, int geom
[])
397 sector_div(capacity
, 255*63);
404 * ata_scsi_unlock_native_capacity - unlock native capacity
405 * @sdev: SCSI device to adjust device capacity for
407 * This function is called if a partition on @sdev extends beyond
408 * the end of the device. It requests EH to unlock HPA.
411 * Defined by the SCSI layer. Might sleep.
413 void ata_scsi_unlock_native_capacity(struct scsi_device
*sdev
)
415 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
416 struct ata_device
*dev
;
419 spin_lock_irqsave(ap
->lock
, flags
);
421 dev
= ata_scsi_find_dev(ap
, sdev
);
422 if (dev
&& dev
->n_sectors
< dev
->n_native_sectors
) {
423 dev
->flags
|= ATA_DFLAG_UNLOCK_HPA
;
424 dev
->link
->eh_info
.action
|= ATA_EH_RESET
;
425 ata_port_schedule_eh(ap
);
428 spin_unlock_irqrestore(ap
->lock
, flags
);
429 ata_port_wait_eh(ap
);
433 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
435 * @sdev: SCSI device to get identify data for
436 * @arg: User buffer area for identify data
439 * Defined by the SCSI layer. We don't really care.
442 * Zero on success, negative errno on error.
444 static int ata_get_identity(struct ata_port
*ap
, struct scsi_device
*sdev
,
447 struct ata_device
*dev
= ata_scsi_find_dev(ap
, sdev
);
448 u16 __user
*dst
= arg
;
454 if (copy_to_user(dst
, dev
->id
, ATA_ID_WORDS
* sizeof(u16
)))
457 ata_id_string(dev
->id
, buf
, ATA_ID_PROD
, ATA_ID_PROD_LEN
);
458 if (copy_to_user(dst
+ ATA_ID_PROD
, buf
, ATA_ID_PROD_LEN
))
461 ata_id_string(dev
->id
, buf
, ATA_ID_FW_REV
, ATA_ID_FW_REV_LEN
);
462 if (copy_to_user(dst
+ ATA_ID_FW_REV
, buf
, ATA_ID_FW_REV_LEN
))
465 ata_id_string(dev
->id
, buf
, ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
466 if (copy_to_user(dst
+ ATA_ID_SERNO
, buf
, ATA_ID_SERNO_LEN
))
473 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
474 * @scsidev: Device to which we are issuing command
475 * @arg: User provided data for issuing command
478 * Defined by the SCSI layer. We don't really care.
481 * Zero on success, negative errno on error.
483 int ata_cmd_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
486 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
487 u8 args
[4], *argbuf
= NULL
, *sensebuf
= NULL
;
489 enum dma_data_direction data_dir
;
495 if (copy_from_user(args
, arg
, sizeof(args
)))
498 sensebuf
= kzalloc(SCSI_SENSE_BUFFERSIZE
, GFP_NOIO
);
502 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
505 argsize
= ATA_SECT_SIZE
* args
[3];
506 argbuf
= kmalloc(argsize
, GFP_KERNEL
);
507 if (argbuf
== NULL
) {
512 scsi_cmd
[1] = (4 << 1); /* PIO Data-in */
513 scsi_cmd
[2] = 0x0e; /* no off.line or cc, read from dev,
514 block count in sector count field */
515 data_dir
= DMA_FROM_DEVICE
;
517 scsi_cmd
[1] = (3 << 1); /* Non-data */
518 scsi_cmd
[2] = 0x20; /* cc but no off.line or data xfer */
522 scsi_cmd
[0] = ATA_16
;
524 scsi_cmd
[4] = args
[2];
525 if (args
[0] == ATA_CMD_SMART
) { /* hack -- ide driver does this too */
526 scsi_cmd
[6] = args
[3];
527 scsi_cmd
[8] = args
[1];
531 scsi_cmd
[6] = args
[1];
533 scsi_cmd
[14] = args
[0];
535 /* Good values for timeout and retries? Values below
536 from scsi_ioctl_send_command() for default case... */
537 cmd_result
= scsi_execute(scsidev
, scsi_cmd
, data_dir
, argbuf
, argsize
,
538 sensebuf
, (10*HZ
), 5, 0, NULL
);
540 if (driver_byte(cmd_result
) == DRIVER_SENSE
) {/* sense data available */
541 u8
*desc
= sensebuf
+ 8;
542 cmd_result
&= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
544 /* If we set cc then ATA pass-through will cause a
545 * check condition even if no error. Filter that. */
546 if (cmd_result
& SAM_STAT_CHECK_CONDITION
) {
547 struct scsi_sense_hdr sshdr
;
548 scsi_normalize_sense(sensebuf
, SCSI_SENSE_BUFFERSIZE
,
550 if (sshdr
.sense_key
== RECOVERED_ERROR
&&
551 sshdr
.asc
== 0 && sshdr
.ascq
== 0x1d)
552 cmd_result
&= ~SAM_STAT_CHECK_CONDITION
;
555 /* Send userspace a few ATA registers (same as drivers/ide) */
556 if (sensebuf
[0] == 0x72 && /* format is "descriptor" */
557 desc
[0] == 0x09) { /* code is "ATA Descriptor" */
558 args
[0] = desc
[13]; /* status */
559 args
[1] = desc
[3]; /* error */
560 args
[2] = desc
[5]; /* sector count (0:7) */
561 if (copy_to_user(arg
, args
, sizeof(args
)))
573 && copy_to_user(arg
+ sizeof(args
), argbuf
, argsize
))
582 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
583 * @scsidev: Device to which we are issuing command
584 * @arg: User provided data for issuing command
587 * Defined by the SCSI layer. We don't really care.
590 * Zero on success, negative errno on error.
592 int ata_task_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
595 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
596 u8 args
[7], *sensebuf
= NULL
;
602 if (copy_from_user(args
, arg
, sizeof(args
)))
605 sensebuf
= kzalloc(SCSI_SENSE_BUFFERSIZE
, GFP_NOIO
);
609 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
610 scsi_cmd
[0] = ATA_16
;
611 scsi_cmd
[1] = (3 << 1); /* Non-data */
612 scsi_cmd
[2] = 0x20; /* cc but no off.line or data xfer */
613 scsi_cmd
[4] = args
[1];
614 scsi_cmd
[6] = args
[2];
615 scsi_cmd
[8] = args
[3];
616 scsi_cmd
[10] = args
[4];
617 scsi_cmd
[12] = args
[5];
618 scsi_cmd
[13] = args
[6] & 0x4f;
619 scsi_cmd
[14] = args
[0];
621 /* Good values for timeout and retries? Values below
622 from scsi_ioctl_send_command() for default case... */
623 cmd_result
= scsi_execute(scsidev
, scsi_cmd
, DMA_NONE
, NULL
, 0,
624 sensebuf
, (10*HZ
), 5, 0, NULL
);
626 if (driver_byte(cmd_result
) == DRIVER_SENSE
) {/* sense data available */
627 u8
*desc
= sensebuf
+ 8;
628 cmd_result
&= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
630 /* If we set cc then ATA pass-through will cause a
631 * check condition even if no error. Filter that. */
632 if (cmd_result
& SAM_STAT_CHECK_CONDITION
) {
633 struct scsi_sense_hdr sshdr
;
634 scsi_normalize_sense(sensebuf
, SCSI_SENSE_BUFFERSIZE
,
636 if (sshdr
.sense_key
== RECOVERED_ERROR
&&
637 sshdr
.asc
== 0 && sshdr
.ascq
== 0x1d)
638 cmd_result
&= ~SAM_STAT_CHECK_CONDITION
;
641 /* Send userspace ATA registers */
642 if (sensebuf
[0] == 0x72 && /* format is "descriptor" */
643 desc
[0] == 0x09) {/* code is "ATA Descriptor" */
644 args
[0] = desc
[13]; /* status */
645 args
[1] = desc
[3]; /* error */
646 args
[2] = desc
[5]; /* sector count (0:7) */
647 args
[3] = desc
[7]; /* lbal */
648 args
[4] = desc
[9]; /* lbam */
649 args
[5] = desc
[11]; /* lbah */
650 args
[6] = desc
[12]; /* select */
651 if (copy_to_user(arg
, args
, sizeof(args
)))
666 static int ata_ioc32(struct ata_port
*ap
)
668 if (ap
->flags
& ATA_FLAG_PIO_DMA
)
670 if (ap
->pflags
& ATA_PFLAG_PIO32
)
675 int ata_sas_scsi_ioctl(struct ata_port
*ap
, struct scsi_device
*scsidev
,
676 int cmd
, void __user
*arg
)
684 spin_lock_irqsave(ap
->lock
, flags
);
686 spin_unlock_irqrestore(ap
->lock
, flags
);
687 return put_user(val
, (unsigned long __user
*)arg
);
690 val
= (unsigned long) arg
;
692 spin_lock_irqsave(ap
->lock
, flags
);
693 if (ap
->pflags
& ATA_PFLAG_PIO32CHANGE
) {
695 ap
->pflags
|= ATA_PFLAG_PIO32
;
697 ap
->pflags
&= ~ATA_PFLAG_PIO32
;
699 if (val
!= ata_ioc32(ap
))
702 spin_unlock_irqrestore(ap
->lock
, flags
);
705 case HDIO_GET_IDENTITY
:
706 return ata_get_identity(ap
, scsidev
, arg
);
709 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
711 return ata_cmd_ioctl(scsidev
, arg
);
713 case HDIO_DRIVE_TASK
:
714 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
716 return ata_task_ioctl(scsidev
, arg
);
725 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl
);
727 int ata_scsi_ioctl(struct scsi_device
*scsidev
, int cmd
, void __user
*arg
)
729 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev
->host
),
732 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
735 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
736 * @dev: ATA device to which the new command is attached
737 * @cmd: SCSI command that originated this ATA command
739 * Obtain a reference to an unused ata_queued_cmd structure,
740 * which is the basic libata structure representing a single
741 * ATA command sent to the hardware.
743 * If a command was available, fill in the SCSI-specific
744 * portions of the structure with information on the
748 * spin_lock_irqsave(host lock)
751 * Command allocated, or %NULL if none available.
753 static struct ata_queued_cmd
*ata_scsi_qc_new(struct ata_device
*dev
,
754 struct scsi_cmnd
*cmd
)
756 struct ata_queued_cmd
*qc
;
758 qc
= ata_qc_new_init(dev
, cmd
->request
->tag
);
761 qc
->scsidone
= cmd
->scsi_done
;
763 qc
->sg
= scsi_sglist(cmd
);
764 qc
->n_elem
= scsi_sg_count(cmd
);
766 cmd
->result
= (DID_OK
<< 16) | (QUEUE_FULL
<< 1);
773 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd
*qc
)
775 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
777 qc
->extrabytes
= scmd
->request
->extra_len
;
778 qc
->nbytes
= scsi_bufflen(scmd
) + qc
->extrabytes
;
782 * ata_dump_status - user friendly display of error info
783 * @id: id of the port in question
784 * @tf: ptr to filled out taskfile
786 * Decode and dump the ATA error/status registers for the user so
787 * that they have some idea what really happened at the non
788 * make-believe layer.
791 * inherited from caller
793 static void ata_dump_status(unsigned id
, struct ata_taskfile
*tf
)
795 u8 stat
= tf
->command
, err
= tf
->feature
;
797 printk(KERN_WARNING
"ata%u: status=0x%02x { ", id
, stat
);
798 if (stat
& ATA_BUSY
) {
799 printk("Busy }\n"); /* Data is not valid in this case */
801 if (stat
& ATA_DRDY
) printk("DriveReady ");
802 if (stat
& ATA_DF
) printk("DeviceFault ");
803 if (stat
& ATA_DSC
) printk("SeekComplete ");
804 if (stat
& ATA_DRQ
) printk("DataRequest ");
805 if (stat
& ATA_CORR
) printk("CorrectedError ");
806 if (stat
& ATA_SENSE
) printk("Sense ");
807 if (stat
& ATA_ERR
) printk("Error ");
811 printk(KERN_WARNING
"ata%u: error=0x%02x { ", id
, err
);
812 if (err
& ATA_ABORTED
) printk("DriveStatusError ");
813 if (err
& ATA_ICRC
) {
814 if (err
& ATA_ABORTED
)
816 else printk("Sector ");
818 if (err
& ATA_UNC
) printk("UncorrectableError ");
819 if (err
& ATA_IDNF
) printk("SectorIdNotFound ");
820 if (err
& ATA_TRK0NF
) printk("TrackZeroNotFound ");
821 if (err
& ATA_AMNF
) printk("AddrMarkNotFound ");
828 * ata_to_sense_error - convert ATA error to SCSI error
829 * @id: ATA device number
830 * @drv_stat: value contained in ATA status register
831 * @drv_err: value contained in ATA error register
832 * @sk: the sense key we'll fill out
833 * @asc: the additional sense code we'll fill out
834 * @ascq: the additional sense code qualifier we'll fill out
835 * @verbose: be verbose
837 * Converts an ATA error into a SCSI error. Fill out pointers to
838 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
839 * format sense blocks.
842 * spin_lock_irqsave(host lock)
844 static void ata_to_sense_error(unsigned id
, u8 drv_stat
, u8 drv_err
, u8
*sk
,
845 u8
*asc
, u8
*ascq
, int verbose
)
849 /* Based on the 3ware driver translation table */
850 static const unsigned char sense_table
[][4] = {
852 {0xd1, ABORTED_COMMAND
, 0x00, 0x00},
853 // Device busy Aborted command
855 {0xd0, ABORTED_COMMAND
, 0x00, 0x00},
856 // Device busy Aborted command
858 {0x61, HARDWARE_ERROR
, 0x00, 0x00},
859 // Device fault Hardware error
860 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
861 {0x84, ABORTED_COMMAND
, 0x47, 0x00},
862 // Data CRC error SCSI parity error
863 /* MC|ID|ABRT|TRK0|MARK */
864 {0x37, NOT_READY
, 0x04, 0x00},
865 // Unit offline Not ready
867 {0x09, NOT_READY
, 0x04, 0x00},
868 // Unrecovered disk error Not ready
869 /* Bad address mark */
870 {0x01, MEDIUM_ERROR
, 0x13, 0x00},
871 // Address mark not found for data field
872 /* TRK0 - Track 0 not found */
873 {0x02, HARDWARE_ERROR
, 0x00, 0x00},
875 /* Abort: 0x04 is not translated here, see below */
876 /* Media change request */
877 {0x08, NOT_READY
, 0x04, 0x00},
878 // FIXME: faking offline
879 /* SRV/IDNF - ID not found */
880 {0x10, ILLEGAL_REQUEST
, 0x21, 0x00},
881 // Logical address out of range
882 /* MC - Media Changed */
883 {0x20, UNIT_ATTENTION
, 0x28, 0x00},
884 // Not ready to ready change, medium may have changed
885 /* ECC - Uncorrectable ECC error */
886 {0x40, MEDIUM_ERROR
, 0x11, 0x04},
887 // Unrecovered read error
888 /* BBD - block marked bad */
889 {0x80, MEDIUM_ERROR
, 0x11, 0x04},
890 // Block marked bad Medium error, unrecovered read error
891 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
893 static const unsigned char stat_table
[][4] = {
894 /* Must be first because BUSY means no other bits valid */
895 {0x80, ABORTED_COMMAND
, 0x47, 0x00},
896 // Busy, fake parity for now
897 {0x40, ILLEGAL_REQUEST
, 0x21, 0x04},
898 // Device ready, unaligned write command
899 {0x20, HARDWARE_ERROR
, 0x44, 0x00},
900 // Device fault, internal target failure
901 {0x08, ABORTED_COMMAND
, 0x47, 0x00},
902 // Timed out in xfer, fake parity for now
903 {0x04, RECOVERED_ERROR
, 0x11, 0x00},
904 // Recovered ECC error Medium error, recovered
905 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
909 * Is this an error we can process/parse
911 if (drv_stat
& ATA_BUSY
) {
912 drv_err
= 0; /* Ignore the err bits, they're invalid */
916 /* Look for drv_err */
917 for (i
= 0; sense_table
[i
][0] != 0xFF; i
++) {
918 /* Look for best matches first */
919 if ((sense_table
[i
][0] & drv_err
) ==
921 *sk
= sense_table
[i
][1];
922 *asc
= sense_table
[i
][2];
923 *ascq
= sense_table
[i
][3];
930 * Fall back to interpreting status bits. Note that if the drv_err
931 * has only the ABRT bit set, we decode drv_stat. ABRT by itself
932 * is not descriptive enough.
934 for (i
= 0; stat_table
[i
][0] != 0xFF; i
++) {
935 if (stat_table
[i
][0] & drv_stat
) {
936 *sk
= stat_table
[i
][1];
937 *asc
= stat_table
[i
][2];
938 *ascq
= stat_table
[i
][3];
944 * We need a sensible error return here, which is tricky, and one
945 * that won't cause people to do things like return a disk wrongly.
947 *sk
= ABORTED_COMMAND
;
953 printk(KERN_ERR
"ata%u: translated ATA stat/err 0x%02x/%02x "
954 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
955 id
, drv_stat
, drv_err
, *sk
, *asc
, *ascq
);
960 * ata_gen_passthru_sense - Generate check condition sense block.
961 * @qc: Command that completed.
963 * This function is specific to the ATA descriptor format sense
964 * block specified for the ATA pass through commands. Regardless
965 * of whether the command errored or not, return a sense
966 * block. Copy all controller registers into the sense
967 * block. If there was no error, we get the request from an ATA
968 * passthrough command, so we use the following sense data:
969 * sk = RECOVERED ERROR
970 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
976 static void ata_gen_passthru_sense(struct ata_queued_cmd
*qc
)
978 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
979 struct ata_taskfile
*tf
= &qc
->result_tf
;
980 unsigned char *sb
= cmd
->sense_buffer
;
981 unsigned char *desc
= sb
+ 8;
982 int verbose
= qc
->ap
->ops
->error_handler
== NULL
;
984 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
986 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
989 * Use ata_to_sense_error() to map status register bits
990 * onto sense key, asc & ascq.
993 tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
994 ata_to_sense_error(qc
->ap
->print_id
, tf
->command
, tf
->feature
,
995 &sb
[1], &sb
[2], &sb
[3], verbose
);
998 sb
[1] = RECOVERED_ERROR
;
1004 * Sense data is current and format is descriptor.
1010 /* set length of additional sense data */
1015 * Copy registers into sense buffer.
1018 desc
[3] = tf
->feature
; /* == error reg */
1019 desc
[5] = tf
->nsect
;
1022 desc
[11] = tf
->lbah
;
1023 desc
[12] = tf
->device
;
1024 desc
[13] = tf
->command
; /* == status reg */
1027 * Fill in Extend bit, and the high order bytes
1030 if (tf
->flags
& ATA_TFLAG_LBA48
) {
1032 desc
[4] = tf
->hob_nsect
;
1033 desc
[6] = tf
->hob_lbal
;
1034 desc
[8] = tf
->hob_lbam
;
1035 desc
[10] = tf
->hob_lbah
;
1040 * ata_gen_ata_sense - generate a SCSI fixed sense block
1041 * @qc: Command that we are erroring out
1043 * Generate sense block for a failed ATA command @qc. Descriptor
1044 * format is used to accommodate LBA48 block address.
1049 static void ata_gen_ata_sense(struct ata_queued_cmd
*qc
)
1051 struct ata_device
*dev
= qc
->dev
;
1052 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1053 struct ata_taskfile
*tf
= &qc
->result_tf
;
1054 unsigned char *sb
= cmd
->sense_buffer
;
1055 unsigned char *desc
= sb
+ 8;
1056 int verbose
= qc
->ap
->ops
->error_handler
== NULL
;
1059 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
1061 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
1063 /* sense data is current and format is descriptor */
1066 /* Use ata_to_sense_error() to map status register bits
1067 * onto sense key, asc & ascq.
1070 tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
1071 ata_to_sense_error(qc
->ap
->print_id
, tf
->command
, tf
->feature
,
1072 &sb
[1], &sb
[2], &sb
[3], verbose
);
1076 block
= ata_tf_read_block(&qc
->result_tf
, dev
);
1078 /* information sense data descriptor */
1083 desc
[2] |= 0x80; /* valid */
1084 desc
[6] = block
>> 40;
1085 desc
[7] = block
>> 32;
1086 desc
[8] = block
>> 24;
1087 desc
[9] = block
>> 16;
1088 desc
[10] = block
>> 8;
1092 static void ata_scsi_sdev_config(struct scsi_device
*sdev
)
1094 sdev
->use_10_for_rw
= 1;
1095 sdev
->use_10_for_ms
= 1;
1096 sdev
->no_report_opcodes
= 1;
1097 sdev
->no_write_same
= 1;
1099 /* Schedule policy is determined by ->qc_defer() callback and
1100 * it needs to see every deferred qc. Set dev_blocked to 1 to
1101 * prevent SCSI midlayer from automatically deferring
1104 sdev
->max_device_blocked
= 1;
1108 * atapi_drain_needed - Check whether data transfer may overflow
1109 * @rq: request to be checked
1111 * ATAPI commands which transfer variable length data to host
1112 * might overflow due to application error or hardare bug. This
1113 * function checks whether overflow should be drained and ignored
1120 * 1 if ; otherwise, 0.
1122 static int atapi_drain_needed(struct request
*rq
)
1124 if (likely(rq
->cmd_type
!= REQ_TYPE_BLOCK_PC
))
1127 if (!blk_rq_bytes(rq
) || (rq
->cmd_flags
& REQ_WRITE
))
1130 return atapi_cmd_type(rq
->cmd
[0]) == ATAPI_MISC
;
1133 static int ata_scsi_dev_config(struct scsi_device
*sdev
,
1134 struct ata_device
*dev
)
1136 struct request_queue
*q
= sdev
->request_queue
;
1138 if (!ata_id_has_unload(dev
->id
))
1139 dev
->flags
|= ATA_DFLAG_NO_UNLOAD
;
1141 /* configure max sectors */
1142 blk_queue_max_hw_sectors(q
, dev
->max_sectors
);
1144 if (dev
->class == ATA_DEV_ATAPI
) {
1147 sdev
->sector_size
= ATA_SECT_SIZE
;
1149 /* set DMA padding */
1150 blk_queue_update_dma_pad(q
, ATA_DMA_PAD_SZ
- 1);
1152 /* configure draining */
1153 buf
= kmalloc(ATAPI_MAX_DRAIN
, q
->bounce_gfp
| GFP_KERNEL
);
1155 ata_dev_err(dev
, "drain buffer allocation failed\n");
1159 blk_queue_dma_drain(q
, atapi_drain_needed
, buf
, ATAPI_MAX_DRAIN
);
1161 sdev
->sector_size
= ata_id_logical_sector_size(dev
->id
);
1162 sdev
->manage_start_stop
= 1;
1166 * ata_pio_sectors() expects buffer for each sector to not cross
1167 * page boundary. Enforce it by requiring buffers to be sector
1168 * aligned, which works iff sector_size is not larger than
1169 * PAGE_SIZE. ATAPI devices also need the alignment as
1170 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1172 if (sdev
->sector_size
> PAGE_SIZE
)
1174 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1177 blk_queue_update_dma_alignment(q
, sdev
->sector_size
- 1);
1179 if (dev
->flags
& ATA_DFLAG_AN
)
1180 set_bit(SDEV_EVT_MEDIA_CHANGE
, sdev
->supported_events
);
1182 if (dev
->flags
& ATA_DFLAG_NCQ
) {
1185 depth
= min(sdev
->host
->can_queue
, ata_id_queue_depth(dev
->id
));
1186 depth
= min(ATA_MAX_QUEUE
- 1, depth
);
1187 scsi_change_queue_depth(sdev
, depth
);
1190 blk_queue_flush_queueable(q
, false);
1197 * ata_scsi_slave_config - Set SCSI device attributes
1198 * @sdev: SCSI device to examine
1200 * This is called before we actually start reading
1201 * and writing to the device, to configure certain
1202 * SCSI mid-layer behaviors.
1205 * Defined by SCSI layer. We don't really care.
1208 int ata_scsi_slave_config(struct scsi_device
*sdev
)
1210 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1211 struct ata_device
*dev
= __ata_scsi_find_dev(ap
, sdev
);
1214 ata_scsi_sdev_config(sdev
);
1217 rc
= ata_scsi_dev_config(sdev
, dev
);
1223 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1224 * @sdev: SCSI device to be destroyed
1226 * @sdev is about to be destroyed for hot/warm unplugging. If
1227 * this unplugging was initiated by libata as indicated by NULL
1228 * dev->sdev, this function doesn't have to do anything.
1229 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1230 * Clear dev->sdev, schedule the device for ATA detach and invoke
1234 * Defined by SCSI layer. We don't really care.
1236 void ata_scsi_slave_destroy(struct scsi_device
*sdev
)
1238 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1239 struct request_queue
*q
= sdev
->request_queue
;
1240 unsigned long flags
;
1241 struct ata_device
*dev
;
1243 if (!ap
->ops
->error_handler
)
1246 spin_lock_irqsave(ap
->lock
, flags
);
1247 dev
= __ata_scsi_find_dev(ap
, sdev
);
1248 if (dev
&& dev
->sdev
) {
1249 /* SCSI device already in CANCEL state, no need to offline it */
1251 dev
->flags
|= ATA_DFLAG_DETACH
;
1252 ata_port_schedule_eh(ap
);
1254 spin_unlock_irqrestore(ap
->lock
, flags
);
1256 kfree(q
->dma_drain_buffer
);
1257 q
->dma_drain_buffer
= NULL
;
1258 q
->dma_drain_size
= 0;
1262 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth
1263 * @ap: ATA port to which the device change the queue depth
1264 * @sdev: SCSI device to configure queue depth for
1265 * @queue_depth: new queue depth
1267 * libsas and libata have different approaches for associating a sdev to
1271 int __ata_change_queue_depth(struct ata_port
*ap
, struct scsi_device
*sdev
,
1274 struct ata_device
*dev
;
1275 unsigned long flags
;
1277 if (queue_depth
< 1 || queue_depth
== sdev
->queue_depth
)
1278 return sdev
->queue_depth
;
1280 dev
= ata_scsi_find_dev(ap
, sdev
);
1281 if (!dev
|| !ata_dev_enabled(dev
))
1282 return sdev
->queue_depth
;
1285 spin_lock_irqsave(ap
->lock
, flags
);
1286 dev
->flags
&= ~ATA_DFLAG_NCQ_OFF
;
1287 if (queue_depth
== 1 || !ata_ncq_enabled(dev
)) {
1288 dev
->flags
|= ATA_DFLAG_NCQ_OFF
;
1291 spin_unlock_irqrestore(ap
->lock
, flags
);
1293 /* limit and apply queue depth */
1294 queue_depth
= min(queue_depth
, sdev
->host
->can_queue
);
1295 queue_depth
= min(queue_depth
, ata_id_queue_depth(dev
->id
));
1296 queue_depth
= min(queue_depth
, ATA_MAX_QUEUE
- 1);
1298 if (sdev
->queue_depth
== queue_depth
)
1301 return scsi_change_queue_depth(sdev
, queue_depth
);
1305 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1306 * @sdev: SCSI device to configure queue depth for
1307 * @queue_depth: new queue depth
1309 * This is libata standard hostt->change_queue_depth callback.
1310 * SCSI will call into this callback when user tries to set queue
1314 * SCSI layer (we don't care)
1317 * Newly configured queue depth.
1319 int ata_scsi_change_queue_depth(struct scsi_device
*sdev
, int queue_depth
)
1321 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1323 return __ata_change_queue_depth(ap
, sdev
, queue_depth
);
1327 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1328 * @qc: Storage for translated ATA taskfile
1330 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1331 * (to start). Perhaps these commands should be preceded by
1332 * CHECK POWER MODE to see what power mode the device is already in.
1333 * [See SAT revision 5 at www.t10.org]
1336 * spin_lock_irqsave(host lock)
1339 * Zero on success, non-zero on error.
1341 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd
*qc
)
1343 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1344 struct ata_taskfile
*tf
= &qc
->tf
;
1345 const u8
*cdb
= scmd
->cmnd
;
1347 if (scmd
->cmd_len
< 5)
1350 tf
->flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1351 tf
->protocol
= ATA_PROT_NODATA
;
1353 ; /* ignore IMMED bit, violates sat-r05 */
1356 goto invalid_fld
; /* LOEJ bit set not supported */
1357 if (((cdb
[4] >> 4) & 0xf) != 0)
1358 goto invalid_fld
; /* power conditions not supported */
1361 tf
->nsect
= 1; /* 1 sector, lba=0 */
1363 if (qc
->dev
->flags
& ATA_DFLAG_LBA
) {
1364 tf
->flags
|= ATA_TFLAG_LBA
;
1369 tf
->device
|= ATA_LBA
;
1372 tf
->lbal
= 0x1; /* sect */
1373 tf
->lbam
= 0x0; /* cyl low */
1374 tf
->lbah
= 0x0; /* cyl high */
1377 tf
->command
= ATA_CMD_VERIFY
; /* READ VERIFY */
1379 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1380 * or S5) causing some drives to spin up and down again.
1382 if ((qc
->ap
->flags
& ATA_FLAG_NO_POWEROFF_SPINDOWN
) &&
1383 system_state
== SYSTEM_POWER_OFF
)
1386 if ((qc
->ap
->flags
& ATA_FLAG_NO_HIBERNATE_SPINDOWN
) &&
1387 system_entering_hibernation())
1390 /* Issue ATA STANDBY IMMEDIATE command */
1391 tf
->command
= ATA_CMD_STANDBYNOW1
;
1395 * Standby and Idle condition timers could be implemented but that
1396 * would require libata to implement the Power condition mode page
1397 * and allow the user to change it. Changing mode pages requires
1398 * MODE SELECT to be implemented.
1404 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1405 /* "Invalid field in cbd" */
1408 scmd
->result
= SAM_STAT_GOOD
;
1414 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1415 * @qc: Storage for translated ATA taskfile
1417 * Sets up an ATA taskfile to issue FLUSH CACHE or
1421 * spin_lock_irqsave(host lock)
1424 * Zero on success, non-zero on error.
1426 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd
*qc
)
1428 struct ata_taskfile
*tf
= &qc
->tf
;
1430 tf
->flags
|= ATA_TFLAG_DEVICE
;
1431 tf
->protocol
= ATA_PROT_NODATA
;
1433 if (qc
->dev
->flags
& ATA_DFLAG_FLUSH_EXT
)
1434 tf
->command
= ATA_CMD_FLUSH_EXT
;
1436 tf
->command
= ATA_CMD_FLUSH
;
1438 /* flush is critical for IO integrity, consider it an IO command */
1439 qc
->flags
|= ATA_QCFLAG_IO
;
1445 * scsi_6_lba_len - Get LBA and transfer length
1446 * @cdb: SCSI command to translate
1448 * Calculate LBA and transfer length for 6-byte commands.
1452 * @plen: the transfer length
1454 static void scsi_6_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1459 VPRINTK("six-byte command\n");
1461 lba
|= ((u64
)(cdb
[1] & 0x1f)) << 16;
1462 lba
|= ((u64
)cdb
[2]) << 8;
1463 lba
|= ((u64
)cdb
[3]);
1472 * scsi_10_lba_len - Get LBA and transfer length
1473 * @cdb: SCSI command to translate
1475 * Calculate LBA and transfer length for 10-byte commands.
1479 * @plen: the transfer length
1481 static void scsi_10_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1486 VPRINTK("ten-byte command\n");
1488 lba
|= ((u64
)cdb
[2]) << 24;
1489 lba
|= ((u64
)cdb
[3]) << 16;
1490 lba
|= ((u64
)cdb
[4]) << 8;
1491 lba
|= ((u64
)cdb
[5]);
1493 len
|= ((u32
)cdb
[7]) << 8;
1494 len
|= ((u32
)cdb
[8]);
1501 * scsi_16_lba_len - Get LBA and transfer length
1502 * @cdb: SCSI command to translate
1504 * Calculate LBA and transfer length for 16-byte commands.
1508 * @plen: the transfer length
1510 static void scsi_16_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1515 VPRINTK("sixteen-byte command\n");
1517 lba
|= ((u64
)cdb
[2]) << 56;
1518 lba
|= ((u64
)cdb
[3]) << 48;
1519 lba
|= ((u64
)cdb
[4]) << 40;
1520 lba
|= ((u64
)cdb
[5]) << 32;
1521 lba
|= ((u64
)cdb
[6]) << 24;
1522 lba
|= ((u64
)cdb
[7]) << 16;
1523 lba
|= ((u64
)cdb
[8]) << 8;
1524 lba
|= ((u64
)cdb
[9]);
1526 len
|= ((u32
)cdb
[10]) << 24;
1527 len
|= ((u32
)cdb
[11]) << 16;
1528 len
|= ((u32
)cdb
[12]) << 8;
1529 len
|= ((u32
)cdb
[13]);
1536 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1537 * @qc: Storage for translated ATA taskfile
1539 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1542 * spin_lock_irqsave(host lock)
1545 * Zero on success, non-zero on error.
1547 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd
*qc
)
1549 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1550 struct ata_taskfile
*tf
= &qc
->tf
;
1551 struct ata_device
*dev
= qc
->dev
;
1552 u64 dev_sectors
= qc
->dev
->n_sectors
;
1553 const u8
*cdb
= scmd
->cmnd
;
1557 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1558 tf
->protocol
= ATA_PROT_NODATA
;
1560 if (cdb
[0] == VERIFY
) {
1561 if (scmd
->cmd_len
< 10)
1563 scsi_10_lba_len(cdb
, &block
, &n_block
);
1564 } else if (cdb
[0] == VERIFY_16
) {
1565 if (scmd
->cmd_len
< 16)
1567 scsi_16_lba_len(cdb
, &block
, &n_block
);
1573 if (block
>= dev_sectors
)
1575 if ((block
+ n_block
) > dev_sectors
)
1578 if (dev
->flags
& ATA_DFLAG_LBA
) {
1579 tf
->flags
|= ATA_TFLAG_LBA
;
1581 if (lba_28_ok(block
, n_block
)) {
1583 tf
->command
= ATA_CMD_VERIFY
;
1584 tf
->device
|= (block
>> 24) & 0xf;
1585 } else if (lba_48_ok(block
, n_block
)) {
1586 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
1590 tf
->flags
|= ATA_TFLAG_LBA48
;
1591 tf
->command
= ATA_CMD_VERIFY_EXT
;
1593 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
1595 tf
->hob_lbah
= (block
>> 40) & 0xff;
1596 tf
->hob_lbam
= (block
>> 32) & 0xff;
1597 tf
->hob_lbal
= (block
>> 24) & 0xff;
1599 /* request too large even for LBA48 */
1602 tf
->nsect
= n_block
& 0xff;
1604 tf
->lbah
= (block
>> 16) & 0xff;
1605 tf
->lbam
= (block
>> 8) & 0xff;
1606 tf
->lbal
= block
& 0xff;
1608 tf
->device
|= ATA_LBA
;
1611 u32 sect
, head
, cyl
, track
;
1613 if (!lba_28_ok(block
, n_block
))
1616 /* Convert LBA to CHS */
1617 track
= (u32
)block
/ dev
->sectors
;
1618 cyl
= track
/ dev
->heads
;
1619 head
= track
% dev
->heads
;
1620 sect
= (u32
)block
% dev
->sectors
+ 1;
1622 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1623 (u32
)block
, track
, cyl
, head
, sect
);
1625 /* Check whether the converted CHS can fit.
1629 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
1632 tf
->command
= ATA_CMD_VERIFY
;
1633 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
1636 tf
->lbah
= cyl
>> 8;
1643 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1644 /* "Invalid field in cbd" */
1648 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1649 /* "Logical Block Address out of range" */
1653 scmd
->result
= SAM_STAT_GOOD
;
1658 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1659 * @qc: Storage for translated ATA taskfile
1661 * Converts any of six SCSI read/write commands into the
1662 * ATA counterpart, including starting sector (LBA),
1663 * sector count, and taking into account the device's LBA48
1666 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1667 * %WRITE_16 are currently supported.
1670 * spin_lock_irqsave(host lock)
1673 * Zero on success, non-zero on error.
1675 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd
*qc
)
1677 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1678 const u8
*cdb
= scmd
->cmnd
;
1679 unsigned int tf_flags
= 0;
1684 if (cdb
[0] == WRITE_10
|| cdb
[0] == WRITE_6
|| cdb
[0] == WRITE_16
)
1685 tf_flags
|= ATA_TFLAG_WRITE
;
1687 /* Calculate the SCSI LBA, transfer length and FUA. */
1691 if (unlikely(scmd
->cmd_len
< 10))
1693 scsi_10_lba_len(cdb
, &block
, &n_block
);
1694 if (cdb
[1] & (1 << 3))
1695 tf_flags
|= ATA_TFLAG_FUA
;
1699 if (unlikely(scmd
->cmd_len
< 6))
1701 scsi_6_lba_len(cdb
, &block
, &n_block
);
1703 /* for 6-byte r/w commands, transfer length 0
1704 * means 256 blocks of data, not 0 block.
1711 if (unlikely(scmd
->cmd_len
< 16))
1713 scsi_16_lba_len(cdb
, &block
, &n_block
);
1714 if (cdb
[1] & (1 << 3))
1715 tf_flags
|= ATA_TFLAG_FUA
;
1718 DPRINTK("no-byte command\n");
1722 /* Check and compose ATA command */
1724 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1725 * length 0 means transfer 0 block of data.
1726 * However, for ATA R/W commands, sector count 0 means
1727 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1729 * WARNING: one or two older ATA drives treat 0 as 0...
1733 qc
->flags
|= ATA_QCFLAG_IO
;
1734 qc
->nbytes
= n_block
* scmd
->device
->sector_size
;
1736 rc
= ata_build_rw_tf(&qc
->tf
, qc
->dev
, block
, n_block
, tf_flags
,
1738 if (likely(rc
== 0))
1743 /* treat all other errors as -EINVAL, fall through */
1745 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1746 /* "Invalid field in cbd" */
1750 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1751 /* "Logical Block Address out of range" */
1755 scmd
->result
= SAM_STAT_GOOD
;
1759 static void ata_qc_done(struct ata_queued_cmd
*qc
)
1761 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1762 void (*done
)(struct scsi_cmnd
*) = qc
->scsidone
;
1768 static void ata_scsi_qc_complete(struct ata_queued_cmd
*qc
)
1770 struct ata_port
*ap
= qc
->ap
;
1771 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1772 u8
*cdb
= cmd
->cmnd
;
1773 int need_sense
= (qc
->err_mask
!= 0);
1775 /* For ATA pass thru (SAT) commands, generate a sense block if
1776 * user mandated it or if there's an error. Note that if we
1777 * generate because the user forced us to [CK_COND =1], a check
1778 * condition is generated and the ATA register values are returned
1779 * whether the command completed successfully or not. If there
1780 * was no error, we use the following sense data:
1781 * sk = RECOVERED ERROR
1782 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1784 if (((cdb
[0] == ATA_16
) || (cdb
[0] == ATA_12
)) &&
1785 ((cdb
[2] & 0x20) || need_sense
))
1786 ata_gen_passthru_sense(qc
);
1787 else if (need_sense
)
1788 ata_gen_ata_sense(qc
);
1790 cmd
->result
= SAM_STAT_GOOD
;
1792 if (need_sense
&& !ap
->ops
->error_handler
)
1793 ata_dump_status(ap
->print_id
, &qc
->result_tf
);
1799 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1800 * @dev: ATA device to which the command is addressed
1801 * @cmd: SCSI command to execute
1802 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1804 * Our ->queuecommand() function has decided that the SCSI
1805 * command issued can be directly translated into an ATA
1806 * command, rather than handled internally.
1808 * This function sets up an ata_queued_cmd structure for the
1809 * SCSI command, and sends that ata_queued_cmd to the hardware.
1811 * The xlat_func argument (actor) returns 0 if ready to execute
1812 * ATA command, else 1 to finish translation. If 1 is returned
1813 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1814 * to be set reflecting an error condition or clean (early)
1818 * spin_lock_irqsave(host lock)
1821 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1822 * needs to be deferred.
1824 static int ata_scsi_translate(struct ata_device
*dev
, struct scsi_cmnd
*cmd
,
1825 ata_xlat_func_t xlat_func
)
1827 struct ata_port
*ap
= dev
->link
->ap
;
1828 struct ata_queued_cmd
*qc
;
1833 qc
= ata_scsi_qc_new(dev
, cmd
);
1837 /* data is present; dma-map it */
1838 if (cmd
->sc_data_direction
== DMA_FROM_DEVICE
||
1839 cmd
->sc_data_direction
== DMA_TO_DEVICE
) {
1840 if (unlikely(scsi_bufflen(cmd
) < 1)) {
1841 ata_dev_warn(dev
, "WARNING: zero len r/w req\n");
1845 ata_sg_init(qc
, scsi_sglist(cmd
), scsi_sg_count(cmd
));
1847 qc
->dma_dir
= cmd
->sc_data_direction
;
1850 qc
->complete_fn
= ata_scsi_qc_complete
;
1855 if (ap
->ops
->qc_defer
) {
1856 if ((rc
= ap
->ops
->qc_defer(qc
)))
1860 /* select device, send command to hardware */
1868 cmd
->scsi_done(cmd
);
1869 DPRINTK("EXIT - early finish (good or error)\n");
1874 cmd
->result
= (DID_ERROR
<< 16);
1875 cmd
->scsi_done(cmd
);
1877 DPRINTK("EXIT - internal\n");
1882 DPRINTK("EXIT - defer\n");
1883 if (rc
== ATA_DEFER_LINK
)
1884 return SCSI_MLQUEUE_DEVICE_BUSY
;
1886 return SCSI_MLQUEUE_HOST_BUSY
;
1890 * ata_scsi_rbuf_get - Map response buffer.
1891 * @cmd: SCSI command containing buffer to be mapped.
1892 * @flags: unsigned long variable to store irq enable status
1893 * @copy_in: copy in from user buffer
1895 * Prepare buffer for simulated SCSI commands.
1898 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
1901 * Pointer to response buffer.
1903 static void *ata_scsi_rbuf_get(struct scsi_cmnd
*cmd
, bool copy_in
,
1904 unsigned long *flags
)
1906 spin_lock_irqsave(&ata_scsi_rbuf_lock
, *flags
);
1908 memset(ata_scsi_rbuf
, 0, ATA_SCSI_RBUF_SIZE
);
1910 sg_copy_to_buffer(scsi_sglist(cmd
), scsi_sg_count(cmd
),
1911 ata_scsi_rbuf
, ATA_SCSI_RBUF_SIZE
);
1912 return ata_scsi_rbuf
;
1916 * ata_scsi_rbuf_put - Unmap response buffer.
1917 * @cmd: SCSI command containing buffer to be unmapped.
1918 * @copy_out: copy out result
1919 * @flags: @flags passed to ata_scsi_rbuf_get()
1921 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1922 * @copy_back is true.
1925 * Unlocks ata_scsi_rbuf_lock.
1927 static inline void ata_scsi_rbuf_put(struct scsi_cmnd
*cmd
, bool copy_out
,
1928 unsigned long *flags
)
1931 sg_copy_from_buffer(scsi_sglist(cmd
), scsi_sg_count(cmd
),
1932 ata_scsi_rbuf
, ATA_SCSI_RBUF_SIZE
);
1933 spin_unlock_irqrestore(&ata_scsi_rbuf_lock
, *flags
);
1937 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1938 * @args: device IDENTIFY data / SCSI command of interest.
1939 * @actor: Callback hook for desired SCSI command simulator
1941 * Takes care of the hard work of simulating a SCSI command...
1942 * Mapping the response buffer, calling the command's handler,
1943 * and handling the handler's return value. This return value
1944 * indicates whether the handler wishes the SCSI command to be
1945 * completed successfully (0), or not (in which case cmd->result
1946 * and sense buffer are assumed to be set).
1949 * spin_lock_irqsave(host lock)
1951 static void ata_scsi_rbuf_fill(struct ata_scsi_args
*args
,
1952 unsigned int (*actor
)(struct ata_scsi_args
*args
, u8
*rbuf
))
1956 struct scsi_cmnd
*cmd
= args
->cmd
;
1957 unsigned long flags
;
1959 rbuf
= ata_scsi_rbuf_get(cmd
, false, &flags
);
1960 rc
= actor(args
, rbuf
);
1961 ata_scsi_rbuf_put(cmd
, rc
== 0, &flags
);
1964 cmd
->result
= SAM_STAT_GOOD
;
1969 * ata_scsiop_inq_std - Simulate INQUIRY command
1970 * @args: device IDENTIFY data / SCSI command of interest.
1971 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1973 * Returns standard device identification data associated
1974 * with non-VPD INQUIRY command output.
1977 * spin_lock_irqsave(host lock)
1979 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args
*args
, u8
*rbuf
)
1981 const u8 versions
[] = {
1983 0x60, /* SAM-3 (no version claimed) */
1986 0x20, /* SBC-2 (no version claimed) */
1989 0x60 /* SPC-3 (no version claimed) */
1991 const u8 versions_zbc
[] = {
1993 0xA0, /* SAM-5 (no version claimed) */
1996 0xC0, /* SBC-3 (no version claimed) */
1999 0x60, /* SPC-4 (no version claimed) */
2002 0x20, /* ZBC (no version claimed) */
2008 0x5, /* claim SPC-3 version compatibility */
2015 /* set scsi removable (RMB) bit per ata bit, or if the
2016 * AHCI port says it's external (Hotplug-capable, eSATA).
2018 if (ata_id_removable(args
->id
) ||
2019 (args
->dev
->link
->ap
->pflags
& ATA_PFLAG_EXTERNAL
))
2022 if (args
->dev
->class == ATA_DEV_ZAC
) {
2024 hdr
[2] = 0x6; /* ZBC is defined in SPC-4 */
2027 memcpy(rbuf
, hdr
, sizeof(hdr
));
2028 memcpy(&rbuf
[8], "ATA ", 8);
2029 ata_id_string(args
->id
, &rbuf
[16], ATA_ID_PROD
, 16);
2031 /* From SAT, use last 2 words from fw rev unless they are spaces */
2032 ata_id_string(args
->id
, &rbuf
[32], ATA_ID_FW_REV
+ 2, 4);
2033 if (strncmp(&rbuf
[32], " ", 4) == 0)
2034 ata_id_string(args
->id
, &rbuf
[32], ATA_ID_FW_REV
, 4);
2036 if (rbuf
[32] == 0 || rbuf
[32] == ' ')
2037 memcpy(&rbuf
[32], "n/a ", 4);
2039 if (args
->dev
->class == ATA_DEV_ZAC
)
2040 memcpy(rbuf
+ 58, versions_zbc
, sizeof(versions_zbc
));
2042 memcpy(rbuf
+ 58, versions
, sizeof(versions
));
2048 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
2049 * @args: device IDENTIFY data / SCSI command of interest.
2050 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2052 * Returns list of inquiry VPD pages available.
2055 * spin_lock_irqsave(host lock)
2057 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args
*args
, u8
*rbuf
)
2059 const u8 pages
[] = {
2060 0x00, /* page 0x00, this page */
2061 0x80, /* page 0x80, unit serial no page */
2062 0x83, /* page 0x83, device ident page */
2063 0x89, /* page 0x89, ata info page */
2064 0xb0, /* page 0xb0, block limits page */
2065 0xb1, /* page 0xb1, block device characteristics page */
2066 0xb2, /* page 0xb2, thin provisioning page */
2069 rbuf
[3] = sizeof(pages
); /* number of supported VPD pages */
2070 memcpy(rbuf
+ 4, pages
, sizeof(pages
));
2075 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
2076 * @args: device IDENTIFY data / SCSI command of interest.
2077 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2079 * Returns ATA device serial number.
2082 * spin_lock_irqsave(host lock)
2084 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args
*args
, u8
*rbuf
)
2088 0x80, /* this page code */
2090 ATA_ID_SERNO_LEN
, /* page len */
2093 memcpy(rbuf
, hdr
, sizeof(hdr
));
2094 ata_id_string(args
->id
, (unsigned char *) &rbuf
[4],
2095 ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
2100 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
2101 * @args: device IDENTIFY data / SCSI command of interest.
2102 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2104 * Yields two logical unit device identification designators:
2105 * - vendor specific ASCII containing the ATA serial number
2106 * - SAT defined "t10 vendor id based" containing ASCII vendor
2107 * name ("ATA "), model and serial numbers.
2110 * spin_lock_irqsave(host lock)
2112 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args
*args
, u8
*rbuf
)
2114 const int sat_model_serial_desc_len
= 68;
2117 rbuf
[1] = 0x83; /* this page code */
2120 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2122 rbuf
[num
+ 3] = ATA_ID_SERNO_LEN
;
2124 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
,
2125 ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
2126 num
+= ATA_ID_SERNO_LEN
;
2128 /* SAT defined lu model and serial numbers descriptor */
2129 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2132 rbuf
[num
+ 3] = sat_model_serial_desc_len
;
2134 memcpy(rbuf
+ num
, "ATA ", 8);
2136 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
, ATA_ID_PROD
,
2138 num
+= ATA_ID_PROD_LEN
;
2139 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
, ATA_ID_SERNO
,
2141 num
+= ATA_ID_SERNO_LEN
;
2143 if (ata_id_has_wwn(args
->id
)) {
2144 /* SAT defined lu world wide name */
2145 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
2148 rbuf
[num
+ 3] = ATA_ID_WWN_LEN
;
2150 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
,
2151 ATA_ID_WWN
, ATA_ID_WWN_LEN
);
2152 num
+= ATA_ID_WWN_LEN
;
2154 rbuf
[3] = num
- 4; /* page len (assume less than 256 bytes) */
2159 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2160 * @args: device IDENTIFY data / SCSI command of interest.
2161 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2163 * Yields SAT-specified ATA VPD page.
2166 * spin_lock_irqsave(host lock)
2168 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args
*args
, u8
*rbuf
)
2170 struct ata_taskfile tf
;
2172 memset(&tf
, 0, sizeof(tf
));
2174 rbuf
[1] = 0x89; /* our page code */
2175 rbuf
[2] = (0x238 >> 8); /* page size fixed at 238h */
2176 rbuf
[3] = (0x238 & 0xff);
2178 memcpy(&rbuf
[8], "linux ", 8);
2179 memcpy(&rbuf
[16], "libata ", 16);
2180 memcpy(&rbuf
[32], DRV_VERSION
, 4);
2182 /* we don't store the ATA device signature, so we fake it */
2184 tf
.command
= ATA_DRDY
; /* really, this is Status reg */
2188 ata_tf_to_fis(&tf
, 0, 1, &rbuf
[36]); /* TODO: PMP? */
2189 rbuf
[36] = 0x34; /* force D2H Reg FIS (34h) */
2191 rbuf
[56] = ATA_CMD_ID_ATA
;
2193 memcpy(&rbuf
[60], &args
->id
[0], 512);
2197 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args
*args
, u8
*rbuf
)
2202 rbuf
[3] = 0x3c; /* required VPD size with unmap support */
2205 * Optimal transfer length granularity.
2207 * This is always one physical block, but for disks with a smaller
2208 * logical than physical sector size we need to figure out what the
2211 min_io_sectors
= 1 << ata_id_log2_per_physical_sector(args
->id
);
2212 put_unaligned_be16(min_io_sectors
, &rbuf
[6]);
2215 * Optimal unmap granularity.
2217 * The ATA spec doesn't even know about a granularity or alignment
2218 * for the TRIM command. We can leave away most of the unmap related
2219 * VPD page entries, but we have specifify a granularity to signal
2220 * that we support some form of unmap - in thise case via WRITE SAME
2221 * with the unmap bit set.
2223 if (ata_id_has_trim(args
->id
)) {
2224 put_unaligned_be64(65535 * 512 / 8, &rbuf
[36]);
2225 put_unaligned_be32(1, &rbuf
[28]);
2231 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args
*args
, u8
*rbuf
)
2233 int form_factor
= ata_id_form_factor(args
->id
);
2234 int media_rotation_rate
= ata_id_rotation_rate(args
->id
);
2238 rbuf
[4] = media_rotation_rate
>> 8;
2239 rbuf
[5] = media_rotation_rate
;
2240 rbuf
[7] = form_factor
;
2245 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args
*args
, u8
*rbuf
)
2247 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2250 rbuf
[5] = 1 << 6; /* TPWS */
2256 * ata_scsiop_noop - Command handler that simply returns success.
2257 * @args: device IDENTIFY data / SCSI command of interest.
2258 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2260 * No operation. Simply returns success to caller, to indicate
2261 * that the caller should successfully complete this SCSI command.
2264 * spin_lock_irqsave(host lock)
2266 static unsigned int ata_scsiop_noop(struct ata_scsi_args
*args
, u8
*rbuf
)
2273 * modecpy - Prepare response for MODE SENSE
2274 * @dest: output buffer
2275 * @src: data being copied
2276 * @n: length of mode page
2277 * @changeable: whether changeable parameters are requested
2279 * Generate a generic MODE SENSE page for either current or changeable
2285 static void modecpy(u8
*dest
, const u8
*src
, int n
, bool changeable
)
2288 memcpy(dest
, src
, 2);
2289 memset(dest
+ 2, 0, n
- 2);
2291 memcpy(dest
, src
, n
);
2296 * ata_msense_caching - Simulate MODE SENSE caching info page
2297 * @id: device IDENTIFY data
2298 * @buf: output buffer
2299 * @changeable: whether changeable parameters are requested
2301 * Generate a caching info page, which conditionally indicates
2302 * write caching to the SCSI layer, depending on device
2308 static unsigned int ata_msense_caching(u16
*id
, u8
*buf
, bool changeable
)
2310 modecpy(buf
, def_cache_mpage
, sizeof(def_cache_mpage
), changeable
);
2311 if (changeable
|| ata_id_wcache_enabled(id
))
2312 buf
[2] |= (1 << 2); /* write cache enable */
2313 if (!changeable
&& !ata_id_rahead_enabled(id
))
2314 buf
[12] |= (1 << 5); /* disable read ahead */
2315 return sizeof(def_cache_mpage
);
2319 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
2320 * @buf: output buffer
2321 * @changeable: whether changeable parameters are requested
2323 * Generate a generic MODE SENSE control mode page.
2328 static unsigned int ata_msense_ctl_mode(u8
*buf
, bool changeable
)
2330 modecpy(buf
, def_control_mpage
, sizeof(def_control_mpage
), changeable
);
2331 return sizeof(def_control_mpage
);
2335 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2336 * @buf: output buffer
2337 * @changeable: whether changeable parameters are requested
2339 * Generate a generic MODE SENSE r/w error recovery page.
2344 static unsigned int ata_msense_rw_recovery(u8
*buf
, bool changeable
)
2346 modecpy(buf
, def_rw_recovery_mpage
, sizeof(def_rw_recovery_mpage
),
2348 return sizeof(def_rw_recovery_mpage
);
2352 * We can turn this into a real blacklist if it's needed, for now just
2353 * blacklist any Maxtor BANC1G10 revision firmware
2355 static int ata_dev_supports_fua(u16
*id
)
2357 unsigned char model
[ATA_ID_PROD_LEN
+ 1], fw
[ATA_ID_FW_REV_LEN
+ 1];
2361 if (!ata_id_has_fua(id
))
2364 ata_id_c_string(id
, model
, ATA_ID_PROD
, sizeof(model
));
2365 ata_id_c_string(id
, fw
, ATA_ID_FW_REV
, sizeof(fw
));
2367 if (strcmp(model
, "Maxtor"))
2369 if (strcmp(fw
, "BANC1G10"))
2372 return 0; /* blacklisted */
2376 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2377 * @args: device IDENTIFY data / SCSI command of interest.
2378 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2380 * Simulate MODE SENSE commands. Assume this is invoked for direct
2381 * access devices (e.g. disks) only. There should be no block
2382 * descriptor for other device types.
2385 * spin_lock_irqsave(host lock)
2387 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args
*args
, u8
*rbuf
)
2389 struct ata_device
*dev
= args
->dev
;
2390 u8
*scsicmd
= args
->cmd
->cmnd
, *p
= rbuf
;
2391 const u8 sat_blk_desc
[] = {
2392 0, 0, 0, 0, /* number of blocks: sat unspecified */
2394 0, 0x2, 0x0 /* block length: 512 bytes */
2397 unsigned int ebd
, page_control
, six_byte
;
2402 six_byte
= (scsicmd
[0] == MODE_SENSE
);
2403 ebd
= !(scsicmd
[1] & 0x8); /* dbd bit inverted == edb */
2405 * LLBA bit in msense(10) ignored (compliant)
2408 page_control
= scsicmd
[2] >> 6;
2409 switch (page_control
) {
2410 case 0: /* current */
2411 case 1: /* changeable */
2412 case 2: /* defaults */
2413 break; /* supported */
2415 goto saving_not_supp
;
2421 p
+= 4 + (ebd
? 8 : 0);
2423 p
+= 8 + (ebd
? 8 : 0);
2425 pg
= scsicmd
[2] & 0x3f;
2428 * No mode subpages supported (yet) but asking for _all_
2429 * subpages may be valid
2431 if (spg
&& (spg
!= ALL_SUB_MPAGES
))
2435 case RW_RECOVERY_MPAGE
:
2436 p
+= ata_msense_rw_recovery(p
, page_control
== 1);
2440 p
+= ata_msense_caching(args
->id
, p
, page_control
== 1);
2444 p
+= ata_msense_ctl_mode(p
, page_control
== 1);
2448 p
+= ata_msense_rw_recovery(p
, page_control
== 1);
2449 p
+= ata_msense_caching(args
->id
, p
, page_control
== 1);
2450 p
+= ata_msense_ctl_mode(p
, page_control
== 1);
2453 default: /* invalid page code */
2458 if (ata_dev_supports_fua(args
->id
) && (dev
->flags
& ATA_DFLAG_LBA48
) &&
2459 (!(dev
->flags
& ATA_DFLAG_PIO
) || dev
->multi_count
))
2463 rbuf
[0] = p
- rbuf
- 1;
2466 rbuf
[3] = sizeof(sat_blk_desc
);
2467 memcpy(rbuf
+ 4, sat_blk_desc
, sizeof(sat_blk_desc
));
2470 unsigned int output_len
= p
- rbuf
- 2;
2472 rbuf
[0] = output_len
>> 8;
2473 rbuf
[1] = output_len
;
2476 rbuf
[7] = sizeof(sat_blk_desc
);
2477 memcpy(rbuf
+ 8, sat_blk_desc
, sizeof(sat_blk_desc
));
2483 ata_scsi_set_sense(args
->cmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
2484 /* "Invalid field in cbd" */
2488 ata_scsi_set_sense(args
->cmd
, ILLEGAL_REQUEST
, 0x39, 0x0);
2489 /* "Saving parameters not supported" */
2494 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2495 * @args: device IDENTIFY data / SCSI command of interest.
2496 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2498 * Simulate READ CAPACITY commands.
2503 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args
*args
, u8
*rbuf
)
2505 struct ata_device
*dev
= args
->dev
;
2506 u64 last_lba
= dev
->n_sectors
- 1; /* LBA of the last block */
2507 u32 sector_size
; /* physical sector size in bytes */
2511 sector_size
= ata_id_logical_sector_size(dev
->id
);
2512 log2_per_phys
= ata_id_log2_per_physical_sector(dev
->id
);
2513 lowest_aligned
= ata_id_logical_sector_offset(dev
->id
, log2_per_phys
);
2517 if (args
->cmd
->cmnd
[0] == READ_CAPACITY
) {
2518 if (last_lba
>= 0xffffffffULL
)
2519 last_lba
= 0xffffffff;
2521 /* sector count, 32-bit */
2522 rbuf
[0] = last_lba
>> (8 * 3);
2523 rbuf
[1] = last_lba
>> (8 * 2);
2524 rbuf
[2] = last_lba
>> (8 * 1);
2528 rbuf
[4] = sector_size
>> (8 * 3);
2529 rbuf
[5] = sector_size
>> (8 * 2);
2530 rbuf
[6] = sector_size
>> (8 * 1);
2531 rbuf
[7] = sector_size
;
2533 /* sector count, 64-bit */
2534 rbuf
[0] = last_lba
>> (8 * 7);
2535 rbuf
[1] = last_lba
>> (8 * 6);
2536 rbuf
[2] = last_lba
>> (8 * 5);
2537 rbuf
[3] = last_lba
>> (8 * 4);
2538 rbuf
[4] = last_lba
>> (8 * 3);
2539 rbuf
[5] = last_lba
>> (8 * 2);
2540 rbuf
[6] = last_lba
>> (8 * 1);
2544 rbuf
[ 8] = sector_size
>> (8 * 3);
2545 rbuf
[ 9] = sector_size
>> (8 * 2);
2546 rbuf
[10] = sector_size
>> (8 * 1);
2547 rbuf
[11] = sector_size
;
2550 rbuf
[13] = log2_per_phys
;
2551 rbuf
[14] = (lowest_aligned
>> 8) & 0x3f;
2552 rbuf
[15] = lowest_aligned
;
2554 if (ata_id_has_trim(args
->id
) &&
2555 !(dev
->horkage
& ATA_HORKAGE_NOTRIM
)) {
2556 rbuf
[14] |= 0x80; /* LBPME */
2558 if (ata_id_has_zero_after_trim(args
->id
) &&
2559 dev
->horkage
& ATA_HORKAGE_ZERO_AFTER_TRIM
) {
2560 ata_dev_info(dev
, "Enabling discard_zeroes_data\n");
2561 rbuf
[14] |= 0x40; /* LBPRZ */
2569 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2570 * @args: device IDENTIFY data / SCSI command of interest.
2571 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2573 * Simulate REPORT LUNS command.
2576 * spin_lock_irqsave(host lock)
2578 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args
*args
, u8
*rbuf
)
2581 rbuf
[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2586 static void atapi_sense_complete(struct ata_queued_cmd
*qc
)
2588 if (qc
->err_mask
&& ((qc
->err_mask
& AC_ERR_DEV
) == 0)) {
2589 /* FIXME: not quite right; we don't want the
2590 * translation of taskfile registers into
2591 * a sense descriptors, since that's only
2592 * correct for ATA, not ATAPI
2594 ata_gen_passthru_sense(qc
);
2600 /* is it pointless to prefer PIO for "safety reasons"? */
2601 static inline int ata_pio_use_silly(struct ata_port
*ap
)
2603 return (ap
->flags
& ATA_FLAG_PIO_DMA
);
2606 static void atapi_request_sense(struct ata_queued_cmd
*qc
)
2608 struct ata_port
*ap
= qc
->ap
;
2609 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2611 DPRINTK("ATAPI request sense\n");
2613 memset(cmd
->sense_buffer
, 0, SCSI_SENSE_BUFFERSIZE
);
2615 #ifdef CONFIG_ATA_SFF
2616 if (ap
->ops
->sff_tf_read
)
2617 ap
->ops
->sff_tf_read(ap
, &qc
->tf
);
2620 /* fill these in, for the case where they are -not- overwritten */
2621 cmd
->sense_buffer
[0] = 0x70;
2622 cmd
->sense_buffer
[2] = qc
->tf
.feature
>> 4;
2626 /* setup sg table and init transfer direction */
2627 sg_init_one(&qc
->sgent
, cmd
->sense_buffer
, SCSI_SENSE_BUFFERSIZE
);
2628 ata_sg_init(qc
, &qc
->sgent
, 1);
2629 qc
->dma_dir
= DMA_FROM_DEVICE
;
2631 memset(&qc
->cdb
, 0, qc
->dev
->cdb_len
);
2632 qc
->cdb
[0] = REQUEST_SENSE
;
2633 qc
->cdb
[4] = SCSI_SENSE_BUFFERSIZE
;
2635 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2636 qc
->tf
.command
= ATA_CMD_PACKET
;
2638 if (ata_pio_use_silly(ap
)) {
2639 qc
->tf
.protocol
= ATAPI_PROT_DMA
;
2640 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
2642 qc
->tf
.protocol
= ATAPI_PROT_PIO
;
2643 qc
->tf
.lbam
= SCSI_SENSE_BUFFERSIZE
;
2646 qc
->nbytes
= SCSI_SENSE_BUFFERSIZE
;
2648 qc
->complete_fn
= atapi_sense_complete
;
2655 static void atapi_qc_complete(struct ata_queued_cmd
*qc
)
2657 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2658 unsigned int err_mask
= qc
->err_mask
;
2660 VPRINTK("ENTER, err_mask 0x%X\n", err_mask
);
2662 /* handle completion from new EH */
2663 if (unlikely(qc
->ap
->ops
->error_handler
&&
2664 (err_mask
|| qc
->flags
& ATA_QCFLAG_SENSE_VALID
))) {
2666 if (!(qc
->flags
& ATA_QCFLAG_SENSE_VALID
)) {
2667 /* FIXME: not quite right; we don't want the
2668 * translation of taskfile registers into a
2669 * sense descriptors, since that's only
2670 * correct for ATA, not ATAPI
2672 ata_gen_passthru_sense(qc
);
2675 /* SCSI EH automatically locks door if sdev->locked is
2676 * set. Sometimes door lock request continues to
2677 * fail, for example, when no media is present. This
2678 * creates a loop - SCSI EH issues door lock which
2679 * fails and gets invoked again to acquire sense data
2680 * for the failed command.
2682 * If door lock fails, always clear sdev->locked to
2683 * avoid this infinite loop.
2685 * This may happen before SCSI scan is complete. Make
2686 * sure qc->dev->sdev isn't NULL before dereferencing.
2688 if (qc
->cdb
[0] == ALLOW_MEDIUM_REMOVAL
&& qc
->dev
->sdev
)
2689 qc
->dev
->sdev
->locked
= 0;
2691 qc
->scsicmd
->result
= SAM_STAT_CHECK_CONDITION
;
2696 /* successful completion or old EH failure path */
2697 if (unlikely(err_mask
& AC_ERR_DEV
)) {
2698 cmd
->result
= SAM_STAT_CHECK_CONDITION
;
2699 atapi_request_sense(qc
);
2701 } else if (unlikely(err_mask
)) {
2702 /* FIXME: not quite right; we don't want the
2703 * translation of taskfile registers into
2704 * a sense descriptors, since that's only
2705 * correct for ATA, not ATAPI
2707 ata_gen_passthru_sense(qc
);
2709 u8
*scsicmd
= cmd
->cmnd
;
2711 if ((scsicmd
[0] == INQUIRY
) && ((scsicmd
[1] & 0x03) == 0)) {
2712 unsigned long flags
;
2715 buf
= ata_scsi_rbuf_get(cmd
, true, &flags
);
2717 /* ATAPI devices typically report zero for their SCSI version,
2718 * and sometimes deviate from the spec WRT response data
2719 * format. If SCSI version is reported as zero like normal,
2720 * then we make the following fixups: 1) Fake MMC-5 version,
2721 * to indicate to the Linux scsi midlayer this is a modern
2722 * device. 2) Ensure response data format / ATAPI information
2723 * are always correct.
2730 ata_scsi_rbuf_put(cmd
, true, &flags
);
2733 cmd
->result
= SAM_STAT_GOOD
;
2739 * atapi_xlat - Initialize PACKET taskfile
2740 * @qc: command structure to be initialized
2743 * spin_lock_irqsave(host lock)
2746 * Zero on success, non-zero on failure.
2748 static unsigned int atapi_xlat(struct ata_queued_cmd
*qc
)
2750 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
2751 struct ata_device
*dev
= qc
->dev
;
2752 int nodata
= (scmd
->sc_data_direction
== DMA_NONE
);
2753 int using_pio
= !nodata
&& (dev
->flags
& ATA_DFLAG_PIO
);
2754 unsigned int nbytes
;
2756 memset(qc
->cdb
, 0, dev
->cdb_len
);
2757 memcpy(qc
->cdb
, scmd
->cmnd
, scmd
->cmd_len
);
2759 qc
->complete_fn
= atapi_qc_complete
;
2761 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2762 if (scmd
->sc_data_direction
== DMA_TO_DEVICE
) {
2763 qc
->tf
.flags
|= ATA_TFLAG_WRITE
;
2764 DPRINTK("direction: write\n");
2767 qc
->tf
.command
= ATA_CMD_PACKET
;
2768 ata_qc_set_pc_nbytes(qc
);
2770 /* check whether ATAPI DMA is safe */
2771 if (!nodata
&& !using_pio
&& atapi_check_dma(qc
))
2774 /* Some controller variants snoop this value for Packet
2775 * transfers to do state machine and FIFO management. Thus we
2776 * want to set it properly, and for DMA where it is
2777 * effectively meaningless.
2779 nbytes
= min(ata_qc_raw_nbytes(qc
), (unsigned int)63 * 1024);
2781 /* Most ATAPI devices which honor transfer chunk size don't
2782 * behave according to the spec when odd chunk size which
2783 * matches the transfer length is specified. If the number of
2784 * bytes to transfer is 2n+1. According to the spec, what
2785 * should happen is to indicate that 2n+1 is going to be
2786 * transferred and transfer 2n+2 bytes where the last byte is
2789 * In practice, this doesn't happen. ATAPI devices first
2790 * indicate and transfer 2n bytes and then indicate and
2791 * transfer 2 bytes where the last byte is padding.
2793 * This inconsistency confuses several controllers which
2794 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2795 * These controllers use actual number of transferred bytes to
2796 * update DMA poitner and transfer of 4n+2 bytes make those
2797 * controller push DMA pointer by 4n+4 bytes because SATA data
2798 * FISes are aligned to 4 bytes. This causes data corruption
2799 * and buffer overrun.
2801 * Always setting nbytes to even number solves this problem
2802 * because then ATAPI devices don't have to split data at 2n
2808 qc
->tf
.lbam
= (nbytes
& 0xFF);
2809 qc
->tf
.lbah
= (nbytes
>> 8);
2812 qc
->tf
.protocol
= ATAPI_PROT_NODATA
;
2814 qc
->tf
.protocol
= ATAPI_PROT_PIO
;
2817 qc
->tf
.protocol
= ATAPI_PROT_DMA
;
2818 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
2820 if ((dev
->flags
& ATA_DFLAG_DMADIR
) &&
2821 (scmd
->sc_data_direction
!= DMA_TO_DEVICE
))
2822 /* some SATA bridges need us to indicate data xfer direction */
2823 qc
->tf
.feature
|= ATAPI_DMADIR
;
2827 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2828 as ATAPI tape drives don't get this right otherwise */
2832 static struct ata_device
*ata_find_dev(struct ata_port
*ap
, int devno
)
2834 if (!sata_pmp_attached(ap
)) {
2835 if (likely(devno
>= 0 &&
2836 devno
< ata_link_max_devices(&ap
->link
)))
2837 return &ap
->link
.device
[devno
];
2839 if (likely(devno
>= 0 &&
2840 devno
< ap
->nr_pmp_links
))
2841 return &ap
->pmp_link
[devno
].device
[0];
2847 static struct ata_device
*__ata_scsi_find_dev(struct ata_port
*ap
,
2848 const struct scsi_device
*scsidev
)
2852 /* skip commands not addressed to targets we simulate */
2853 if (!sata_pmp_attached(ap
)) {
2854 if (unlikely(scsidev
->channel
|| scsidev
->lun
))
2856 devno
= scsidev
->id
;
2858 if (unlikely(scsidev
->id
|| scsidev
->lun
))
2860 devno
= scsidev
->channel
;
2863 return ata_find_dev(ap
, devno
);
2867 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2868 * @ap: ATA port to which the device is attached
2869 * @scsidev: SCSI device from which we derive the ATA device
2871 * Given various information provided in struct scsi_cmnd,
2872 * map that onto an ATA bus, and using that mapping
2873 * determine which ata_device is associated with the
2874 * SCSI command to be sent.
2877 * spin_lock_irqsave(host lock)
2880 * Associated ATA device, or %NULL if not found.
2882 static struct ata_device
*
2883 ata_scsi_find_dev(struct ata_port
*ap
, const struct scsi_device
*scsidev
)
2885 struct ata_device
*dev
= __ata_scsi_find_dev(ap
, scsidev
);
2887 if (unlikely(!dev
|| !ata_dev_enabled(dev
)))
2894 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2895 * @byte1: Byte 1 from pass-thru CDB.
2898 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2901 ata_scsi_map_proto(u8 byte1
)
2903 switch((byte1
& 0x1e) >> 1) {
2904 case 3: /* Non-data */
2905 return ATA_PROT_NODATA
;
2908 case 10: /* UDMA Data-in */
2909 case 11: /* UDMA Data-Out */
2910 return ATA_PROT_DMA
;
2912 case 4: /* PIO Data-in */
2913 case 5: /* PIO Data-out */
2914 return ATA_PROT_PIO
;
2916 case 12: /* FPDMA */
2917 return ATA_PROT_NCQ
;
2919 case 0: /* Hard Reset */
2921 case 8: /* Device Diagnostic */
2922 case 9: /* Device Reset */
2923 case 7: /* DMA Queued */
2924 case 15: /* Return Response Info */
2925 default: /* Reserved */
2929 return ATA_PROT_UNKNOWN
;
2933 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2934 * @qc: command structure to be initialized
2936 * Handles either 12 or 16-byte versions of the CDB.
2939 * Zero on success, non-zero on failure.
2941 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd
*qc
)
2943 struct ata_taskfile
*tf
= &(qc
->tf
);
2944 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
2945 struct ata_device
*dev
= qc
->dev
;
2946 const u8
*cdb
= scmd
->cmnd
;
2948 if ((tf
->protocol
= ata_scsi_map_proto(cdb
[1])) == ATA_PROT_UNKNOWN
)
2952 tf
->flags
|= ATA_TFLAG_LBA
;
2955 * 12 and 16 byte CDBs use different offsets to
2956 * provide the various register values.
2958 if (cdb
[0] == ATA_16
) {
2960 * 16-byte CDB - may contain extended commands.
2962 * If that is the case, copy the upper byte register values.
2964 if (cdb
[1] & 0x01) {
2965 tf
->hob_feature
= cdb
[3];
2966 tf
->hob_nsect
= cdb
[5];
2967 tf
->hob_lbal
= cdb
[7];
2968 tf
->hob_lbam
= cdb
[9];
2969 tf
->hob_lbah
= cdb
[11];
2970 tf
->flags
|= ATA_TFLAG_LBA48
;
2972 tf
->flags
&= ~ATA_TFLAG_LBA48
;
2975 * Always copy low byte, device and command registers.
2977 tf
->feature
= cdb
[4];
2982 tf
->device
= cdb
[13];
2983 tf
->command
= cdb
[14];
2986 * 12-byte CDB - incapable of extended commands.
2988 tf
->flags
&= ~ATA_TFLAG_LBA48
;
2990 tf
->feature
= cdb
[3];
2995 tf
->device
= cdb
[8];
2996 tf
->command
= cdb
[9];
2999 /* For NCQ commands with FPDMA protocol, copy the tag value */
3000 if (tf
->protocol
== ATA_PROT_NCQ
)
3001 tf
->nsect
= qc
->tag
<< 3;
3003 /* enforce correct master/slave bit */
3004 tf
->device
= dev
->devno
?
3005 tf
->device
| ATA_DEV1
: tf
->device
& ~ATA_DEV1
;
3007 switch (tf
->command
) {
3008 /* READ/WRITE LONG use a non-standard sect_size */
3009 case ATA_CMD_READ_LONG
:
3010 case ATA_CMD_READ_LONG_ONCE
:
3011 case ATA_CMD_WRITE_LONG
:
3012 case ATA_CMD_WRITE_LONG_ONCE
:
3013 if (tf
->protocol
!= ATA_PROT_PIO
|| tf
->nsect
!= 1)
3015 qc
->sect_size
= scsi_bufflen(scmd
);
3018 /* commands using reported Logical Block size (e.g. 512 or 4K) */
3019 case ATA_CMD_CFA_WRITE_NE
:
3020 case ATA_CMD_CFA_TRANS_SECT
:
3021 case ATA_CMD_CFA_WRITE_MULT_NE
:
3022 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
3024 case ATA_CMD_READ_EXT
:
3025 case ATA_CMD_READ_QUEUED
:
3026 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
3027 case ATA_CMD_FPDMA_READ
:
3028 case ATA_CMD_READ_MULTI
:
3029 case ATA_CMD_READ_MULTI_EXT
:
3030 case ATA_CMD_PIO_READ
:
3031 case ATA_CMD_PIO_READ_EXT
:
3032 case ATA_CMD_READ_STREAM_DMA_EXT
:
3033 case ATA_CMD_READ_STREAM_EXT
:
3034 case ATA_CMD_VERIFY
:
3035 case ATA_CMD_VERIFY_EXT
:
3037 case ATA_CMD_WRITE_EXT
:
3038 case ATA_CMD_WRITE_FUA_EXT
:
3039 case ATA_CMD_WRITE_QUEUED
:
3040 case ATA_CMD_WRITE_QUEUED_FUA_EXT
:
3041 case ATA_CMD_FPDMA_WRITE
:
3042 case ATA_CMD_WRITE_MULTI
:
3043 case ATA_CMD_WRITE_MULTI_EXT
:
3044 case ATA_CMD_WRITE_MULTI_FUA_EXT
:
3045 case ATA_CMD_PIO_WRITE
:
3046 case ATA_CMD_PIO_WRITE_EXT
:
3047 case ATA_CMD_WRITE_STREAM_DMA_EXT
:
3048 case ATA_CMD_WRITE_STREAM_EXT
:
3049 qc
->sect_size
= scmd
->device
->sector_size
;
3052 /* Everything else uses 512 byte "sectors" */
3054 qc
->sect_size
= ATA_SECT_SIZE
;
3058 * Set flags so that all registers will be written, pass on
3059 * write indication (used for PIO/DMA setup), result TF is
3060 * copied back and we don't whine too much about its failure.
3062 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
3063 if (scmd
->sc_data_direction
== DMA_TO_DEVICE
)
3064 tf
->flags
|= ATA_TFLAG_WRITE
;
3066 qc
->flags
|= ATA_QCFLAG_RESULT_TF
| ATA_QCFLAG_QUIET
;
3069 * Set transfer length.
3071 * TODO: find out if we need to do more here to
3072 * cover scatter/gather case.
3074 ata_qc_set_pc_nbytes(qc
);
3076 /* We may not issue DMA commands if no DMA mode is set */
3077 if (tf
->protocol
== ATA_PROT_DMA
&& dev
->dma_mode
== 0)
3080 /* sanity check for pio multi commands */
3081 if ((cdb
[1] & 0xe0) && !is_multi_taskfile(tf
))
3084 if (is_multi_taskfile(tf
)) {
3085 unsigned int multi_count
= 1 << (cdb
[1] >> 5);
3087 /* compare the passed through multi_count
3088 * with the cached multi_count of libata
3090 if (multi_count
!= dev
->multi_count
)
3091 ata_dev_warn(dev
, "invalid multi_count %u ignored\n",
3096 * Filter SET_FEATURES - XFER MODE command -- otherwise,
3097 * SET_FEATURES - XFER MODE must be preceded/succeeded
3098 * by an update to hardware-specific registers for each
3099 * controller (i.e. the reason for ->set_piomode(),
3100 * ->set_dmamode(), and ->post_set_mode() hooks).
3102 if (tf
->command
== ATA_CMD_SET_FEATURES
&&
3103 tf
->feature
== SETFEATURES_XFER
)
3107 * Filter TPM commands by default. These provide an
3108 * essentially uncontrolled encrypted "back door" between
3109 * applications and the disk. Set libata.allow_tpm=1 if you
3110 * have a real reason for wanting to use them. This ensures
3111 * that installed software cannot easily mess stuff up without
3112 * user intent. DVR type users will probably ship with this enabled
3113 * for movie content management.
3115 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
3116 * for this and should do in future but that it is not sufficient as
3117 * DCS is an optional feature set. Thus we also do the software filter
3118 * so that we comply with the TC consortium stated goal that the user
3119 * can turn off TC features of their system.
3121 if (tf
->command
>= 0x5C && tf
->command
<= 0x5F && !libata_allow_tpm
)
3127 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x00);
3128 /* "Invalid field in cdb" */
3132 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd
*qc
)
3134 struct ata_taskfile
*tf
= &qc
->tf
;
3135 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
3136 struct ata_device
*dev
= qc
->dev
;
3137 const u8
*cdb
= scmd
->cmnd
;
3143 /* we may not issue DMA commands if no DMA mode is set */
3144 if (unlikely(!dev
->dma_mode
))
3147 if (unlikely(scmd
->cmd_len
< 16))
3149 scsi_16_lba_len(cdb
, &block
, &n_block
);
3151 /* for now we only support WRITE SAME with the unmap bit set */
3152 if (unlikely(!(cdb
[1] & 0x8)))
3156 * WRITE SAME always has a sector sized buffer as payload, this
3157 * should never be a multiple entry S/G list.
3159 if (!scsi_sg_count(scmd
))
3162 buf
= page_address(sg_page(scsi_sglist(scmd
)));
3163 size
= ata_set_lba_range_entries(buf
, 512, block
, n_block
);
3165 if (ata_ncq_enabled(dev
) && ata_fpdma_dsm_supported(dev
)) {
3166 /* Newer devices support queued TRIM commands */
3167 tf
->protocol
= ATA_PROT_NCQ
;
3168 tf
->command
= ATA_CMD_FPDMA_SEND
;
3169 tf
->hob_nsect
= ATA_SUBCMD_FPDMA_SEND_DSM
& 0x1f;
3170 tf
->nsect
= qc
->tag
<< 3;
3171 tf
->hob_feature
= (size
/ 512) >> 8;
3172 tf
->feature
= size
/ 512;
3176 tf
->protocol
= ATA_PROT_DMA
;
3177 tf
->hob_feature
= 0;
3178 tf
->feature
= ATA_DSM_TRIM
;
3179 tf
->hob_nsect
= (size
/ 512) >> 8;
3180 tf
->nsect
= size
/ 512;
3181 tf
->command
= ATA_CMD_DSM
;
3184 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_LBA48
|
3187 ata_qc_set_pc_nbytes(qc
);
3192 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x00);
3193 /* "Invalid field in cdb" */
3198 * ata_mselect_caching - Simulate MODE SELECT for caching info page
3199 * @qc: Storage for translated ATA taskfile
3200 * @buf: input buffer
3201 * @len: number of valid bytes in the input buffer
3203 * Prepare a taskfile to modify caching information for the device.
3208 static int ata_mselect_caching(struct ata_queued_cmd
*qc
,
3209 const u8
*buf
, int len
)
3211 struct ata_taskfile
*tf
= &qc
->tf
;
3212 struct ata_device
*dev
= qc
->dev
;
3213 char mpage
[CACHE_MPAGE_LEN
];
3217 * The first two bytes of def_cache_mpage are a header, so offsets
3218 * in mpage are off by 2 compared to buf. Same for len.
3221 if (len
!= CACHE_MPAGE_LEN
- 2)
3224 wce
= buf
[0] & (1 << 2);
3227 * Check that read-only bits are not modified.
3229 ata_msense_caching(dev
->id
, mpage
, false);
3230 mpage
[2] &= ~(1 << 2);
3232 if (memcmp(mpage
+ 2, buf
, CACHE_MPAGE_LEN
- 2) != 0)
3235 tf
->flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
3236 tf
->protocol
= ATA_PROT_NODATA
;
3238 tf
->command
= ATA_CMD_SET_FEATURES
;
3239 tf
->feature
= wce
? SETFEATURES_WC_ON
: SETFEATURES_WC_OFF
;
3244 * ata_scsiop_mode_select - Simulate MODE SELECT 6, 10 commands
3245 * @qc: Storage for translated ATA taskfile
3247 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile.
3248 * Assume this is invoked for direct access devices (e.g. disks) only.
3249 * There should be no block descriptor for other device types.
3252 * spin_lock_irqsave(host lock)
3254 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd
*qc
)
3256 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
3257 const u8
*cdb
= scmd
->cmnd
;
3260 unsigned six_byte
, pg_len
, hdr_len
, bd_len
;
3265 six_byte
= (cdb
[0] == MODE_SELECT
);
3267 if (scmd
->cmd_len
< 5)
3273 if (scmd
->cmd_len
< 9)
3276 len
= (cdb
[7] << 8) + cdb
[8];
3280 /* We only support PF=1, SP=0. */
3281 if ((cdb
[1] & 0x11) != 0x10)
3284 /* Test early for possible overrun. */
3285 if (!scsi_sg_count(scmd
) || scsi_sglist(scmd
)->length
< len
)
3286 goto invalid_param_len
;
3288 p
= page_address(sg_page(scsi_sglist(scmd
)));
3290 /* Move past header and block descriptors. */
3292 goto invalid_param_len
;
3297 bd_len
= (p
[6] << 8) + p
[7];
3302 goto invalid_param_len
;
3303 if (bd_len
!= 0 && bd_len
!= 8)
3311 /* Parse both possible formats for the mode page headers. */
3315 goto invalid_param_len
;
3318 pg_len
= (p
[2] << 8) | p
[3];
3323 goto invalid_param_len
;
3332 * No mode subpages supported (yet) but asking for _all_
3333 * subpages may be valid
3335 if (spg
&& (spg
!= ALL_SUB_MPAGES
))
3338 goto invalid_param_len
;
3342 if (ata_mselect_caching(qc
, p
, pg_len
) < 0)
3346 default: /* invalid page code */
3351 * Only one page has changeable data, so we only support setting one
3360 /* "Invalid field in CDB" */
3361 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
3365 /* "Invalid field in parameter list" */
3366 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x26, 0x0);
3370 /* "Parameter list length error" */
3371 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x1a, 0x0);
3375 scmd
->result
= SAM_STAT_GOOD
;
3380 * ata_get_xlat_func - check if SCSI to ATA translation is possible
3382 * @cmd: SCSI command opcode to consider
3384 * Look up the SCSI command given, and determine whether the
3385 * SCSI command is to be translated or simulated.
3388 * Pointer to translation function if possible, %NULL if not.
3391 static inline ata_xlat_func_t
ata_get_xlat_func(struct ata_device
*dev
, u8 cmd
)
3401 return ata_scsi_rw_xlat
;
3404 return ata_scsi_write_same_xlat
;
3406 case SYNCHRONIZE_CACHE
:
3407 if (ata_try_flush_cache(dev
))
3408 return ata_scsi_flush_xlat
;
3413 return ata_scsi_verify_xlat
;
3417 return ata_scsi_pass_thru
;
3420 case MODE_SELECT_10
:
3421 return ata_scsi_mode_select_xlat
;
3425 return ata_scsi_start_stop_xlat
;
3432 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
3433 * @ap: ATA port to which the command was being sent
3434 * @cmd: SCSI command to dump
3436 * Prints the contents of a SCSI command via printk().
3439 static inline void ata_scsi_dump_cdb(struct ata_port
*ap
,
3440 struct scsi_cmnd
*cmd
)
3443 struct scsi_device
*scsidev
= cmd
->device
;
3444 u8
*scsicmd
= cmd
->cmnd
;
3446 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
3448 scsidev
->channel
, scsidev
->id
, scsidev
->lun
,
3449 scsicmd
[0], scsicmd
[1], scsicmd
[2], scsicmd
[3],
3450 scsicmd
[4], scsicmd
[5], scsicmd
[6], scsicmd
[7],
3455 static inline int __ata_scsi_queuecmd(struct scsi_cmnd
*scmd
,
3456 struct ata_device
*dev
)
3458 u8 scsi_op
= scmd
->cmnd
[0];
3459 ata_xlat_func_t xlat_func
;
3462 if (dev
->class == ATA_DEV_ATA
|| dev
->class == ATA_DEV_ZAC
) {
3463 if (unlikely(!scmd
->cmd_len
|| scmd
->cmd_len
> dev
->cdb_len
))
3466 xlat_func
= ata_get_xlat_func(dev
, scsi_op
);
3468 if (unlikely(!scmd
->cmd_len
))
3472 if (likely((scsi_op
!= ATA_16
) || !atapi_passthru16
)) {
3473 /* relay SCSI command to ATAPI device */
3474 int len
= COMMAND_SIZE(scsi_op
);
3475 if (unlikely(len
> scmd
->cmd_len
||
3476 len
> dev
->cdb_len
||
3477 scmd
->cmd_len
> ATAPI_CDB_LEN
))
3480 xlat_func
= atapi_xlat
;
3482 /* ATA_16 passthru, treat as an ATA command */
3483 if (unlikely(scmd
->cmd_len
> 16))
3486 xlat_func
= ata_get_xlat_func(dev
, scsi_op
);
3491 rc
= ata_scsi_translate(dev
, scmd
, xlat_func
);
3493 ata_scsi_simulate(dev
, scmd
);
3498 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
3499 scmd
->cmd_len
, scsi_op
, dev
->cdb_len
);
3500 scmd
->result
= DID_ERROR
<< 16;
3501 scmd
->scsi_done(scmd
);
3506 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
3507 * @shost: SCSI host of command to be sent
3508 * @cmd: SCSI command to be sent
3510 * In some cases, this function translates SCSI commands into
3511 * ATA taskfiles, and queues the taskfiles to be sent to
3512 * hardware. In other cases, this function simulates a
3513 * SCSI device by evaluating and responding to certain
3514 * SCSI commands. This creates the overall effect of
3515 * ATA and ATAPI devices appearing as SCSI devices.
3521 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3524 int ata_scsi_queuecmd(struct Scsi_Host
*shost
, struct scsi_cmnd
*cmd
)
3526 struct ata_port
*ap
;
3527 struct ata_device
*dev
;
3528 struct scsi_device
*scsidev
= cmd
->device
;
3530 unsigned long irq_flags
;
3532 ap
= ata_shost_to_port(shost
);
3534 spin_lock_irqsave(ap
->lock
, irq_flags
);
3536 ata_scsi_dump_cdb(ap
, cmd
);
3538 dev
= ata_scsi_find_dev(ap
, scsidev
);
3540 rc
= __ata_scsi_queuecmd(cmd
, dev
);
3542 cmd
->result
= (DID_BAD_TARGET
<< 16);
3543 cmd
->scsi_done(cmd
);
3546 spin_unlock_irqrestore(ap
->lock
, irq_flags
);
3552 * ata_scsi_simulate - simulate SCSI command on ATA device
3553 * @dev: the target device
3554 * @cmd: SCSI command being sent to device.
3556 * Interprets and directly executes a select list of SCSI commands
3557 * that can be handled internally.
3560 * spin_lock_irqsave(host lock)
3563 void ata_scsi_simulate(struct ata_device
*dev
, struct scsi_cmnd
*cmd
)
3565 struct ata_scsi_args args
;
3566 const u8
*scsicmd
= cmd
->cmnd
;
3572 args
.done
= cmd
->scsi_done
;
3574 switch(scsicmd
[0]) {
3575 /* TODO: worth improving? */
3577 ata_scsi_invalid_field(cmd
);
3581 if (scsicmd
[1] & 2) /* is CmdDt set? */
3582 ata_scsi_invalid_field(cmd
);
3583 else if ((scsicmd
[1] & 1) == 0) /* is EVPD clear? */
3584 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_std
);
3585 else switch (scsicmd
[2]) {
3587 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_00
);
3590 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_80
);
3593 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_83
);
3596 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_89
);
3599 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_b0
);
3602 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_b1
);
3605 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_b2
);
3608 ata_scsi_invalid_field(cmd
);
3615 ata_scsi_rbuf_fill(&args
, ata_scsiop_mode_sense
);
3619 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
3622 case SERVICE_ACTION_IN_16
:
3623 if ((scsicmd
[1] & 0x1f) == SAI_READ_CAPACITY_16
)
3624 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
3626 ata_scsi_invalid_field(cmd
);
3630 ata_scsi_rbuf_fill(&args
, ata_scsiop_report_luns
);
3634 ata_scsi_set_sense(cmd
, 0, 0, 0);
3635 cmd
->result
= (DRIVER_SENSE
<< 24);
3636 cmd
->scsi_done(cmd
);
3639 /* if we reach this, then writeback caching is disabled,
3640 * turning this into a no-op.
3642 case SYNCHRONIZE_CACHE
:
3645 /* no-op's, complete with success */
3649 case TEST_UNIT_READY
:
3650 ata_scsi_rbuf_fill(&args
, ata_scsiop_noop
);
3653 case SEND_DIAGNOSTIC
:
3654 tmp8
= scsicmd
[1] & ~(1 << 3);
3655 if ((tmp8
== 0x4) && (!scsicmd
[3]) && (!scsicmd
[4]))
3656 ata_scsi_rbuf_fill(&args
, ata_scsiop_noop
);
3658 ata_scsi_invalid_field(cmd
);
3661 /* all other commands */
3663 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, 0x20, 0x0);
3664 /* "Invalid command operation code" */
3665 cmd
->scsi_done(cmd
);
3670 int ata_scsi_add_hosts(struct ata_host
*host
, struct scsi_host_template
*sht
)
3674 for (i
= 0; i
< host
->n_ports
; i
++) {
3675 struct ata_port
*ap
= host
->ports
[i
];
3676 struct Scsi_Host
*shost
;
3679 shost
= scsi_host_alloc(sht
, sizeof(struct ata_port
*));
3683 shost
->eh_noresume
= 1;
3684 *(struct ata_port
**)&shost
->hostdata
[0] = ap
;
3685 ap
->scsi_host
= shost
;
3687 shost
->transportt
= ata_scsi_transport_template
;
3688 shost
->unique_id
= ap
->print_id
;
3691 shost
->max_channel
= 1;
3692 shost
->max_cmd_len
= 16;
3693 shost
->no_write_same
= 1;
3695 /* Schedule policy is determined by ->qc_defer()
3696 * callback and it needs to see every deferred qc.
3697 * Set host_blocked to 1 to prevent SCSI midlayer from
3698 * automatically deferring requests.
3700 shost
->max_host_blocked
= 1;
3702 rc
= scsi_add_host_with_dma(ap
->scsi_host
,
3703 &ap
->tdev
, ap
->host
->dev
);
3711 scsi_host_put(host
->ports
[i
]->scsi_host
);
3714 struct Scsi_Host
*shost
= host
->ports
[i
]->scsi_host
;
3716 scsi_remove_host(shost
);
3717 scsi_host_put(shost
);
3722 void ata_scsi_scan_host(struct ata_port
*ap
, int sync
)
3725 struct ata_device
*last_failed_dev
= NULL
;
3726 struct ata_link
*link
;
3727 struct ata_device
*dev
;
3730 ata_for_each_link(link
, ap
, EDGE
) {
3731 ata_for_each_dev(dev
, link
, ENABLED
) {
3732 struct scsi_device
*sdev
;
3733 int channel
= 0, id
= 0;
3738 if (ata_is_host_link(link
))
3741 channel
= link
->pmp
;
3743 sdev
= __scsi_add_device(ap
->scsi_host
, channel
, id
, 0,
3745 if (!IS_ERR(sdev
)) {
3747 scsi_device_put(sdev
);
3754 /* If we scanned while EH was in progress or allocation
3755 * failure occurred, scan would have failed silently. Check
3756 * whether all devices are attached.
3758 ata_for_each_link(link
, ap
, EDGE
) {
3759 ata_for_each_dev(dev
, link
, ENABLED
) {
3768 /* we're missing some SCSI devices */
3770 /* If caller requested synchrnous scan && we've made
3771 * any progress, sleep briefly and repeat.
3773 if (dev
!= last_failed_dev
) {
3775 last_failed_dev
= dev
;
3779 /* We might be failing to detect boot device, give it
3780 * a few more chances.
3788 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n");
3791 queue_delayed_work(system_long_wq
, &ap
->hotplug_task
,
3792 round_jiffies_relative(HZ
));
3796 * ata_scsi_offline_dev - offline attached SCSI device
3797 * @dev: ATA device to offline attached SCSI device for
3799 * This function is called from ata_eh_hotplug() and responsible
3800 * for taking the SCSI device attached to @dev offline. This
3801 * function is called with host lock which protects dev->sdev
3805 * spin_lock_irqsave(host lock)
3808 * 1 if attached SCSI device exists, 0 otherwise.
3810 int ata_scsi_offline_dev(struct ata_device
*dev
)
3813 scsi_device_set_state(dev
->sdev
, SDEV_OFFLINE
);
3820 * ata_scsi_remove_dev - remove attached SCSI device
3821 * @dev: ATA device to remove attached SCSI device for
3823 * This function is called from ata_eh_scsi_hotplug() and
3824 * responsible for removing the SCSI device attached to @dev.
3827 * Kernel thread context (may sleep).
3829 static void ata_scsi_remove_dev(struct ata_device
*dev
)
3831 struct ata_port
*ap
= dev
->link
->ap
;
3832 struct scsi_device
*sdev
;
3833 unsigned long flags
;
3835 /* Alas, we need to grab scan_mutex to ensure SCSI device
3836 * state doesn't change underneath us and thus
3837 * scsi_device_get() always succeeds. The mutex locking can
3838 * be removed if there is __scsi_device_get() interface which
3839 * increments reference counts regardless of device state.
3841 mutex_lock(&ap
->scsi_host
->scan_mutex
);
3842 spin_lock_irqsave(ap
->lock
, flags
);
3844 /* clearing dev->sdev is protected by host lock */
3849 /* If user initiated unplug races with us, sdev can go
3850 * away underneath us after the host lock and
3851 * scan_mutex are released. Hold onto it.
3853 if (scsi_device_get(sdev
) == 0) {
3854 /* The following ensures the attached sdev is
3855 * offline on return from ata_scsi_offline_dev()
3856 * regardless it wins or loses the race
3857 * against this function.
3859 scsi_device_set_state(sdev
, SDEV_OFFLINE
);
3866 spin_unlock_irqrestore(ap
->lock
, flags
);
3867 mutex_unlock(&ap
->scsi_host
->scan_mutex
);
3870 ata_dev_info(dev
, "detaching (SCSI %s)\n",
3871 dev_name(&sdev
->sdev_gendev
));
3873 scsi_remove_device(sdev
);
3874 scsi_device_put(sdev
);
3878 static void ata_scsi_handle_link_detach(struct ata_link
*link
)
3880 struct ata_port
*ap
= link
->ap
;
3881 struct ata_device
*dev
;
3883 ata_for_each_dev(dev
, link
, ALL
) {
3884 unsigned long flags
;
3886 if (!(dev
->flags
& ATA_DFLAG_DETACHED
))
3889 spin_lock_irqsave(ap
->lock
, flags
);
3890 dev
->flags
&= ~ATA_DFLAG_DETACHED
;
3891 spin_unlock_irqrestore(ap
->lock
, flags
);
3893 if (zpodd_dev_enabled(dev
))
3896 ata_scsi_remove_dev(dev
);
3901 * ata_scsi_media_change_notify - send media change event
3902 * @dev: Pointer to the disk device with media change event
3904 * Tell the block layer to send a media change notification
3908 * spin_lock_irqsave(host lock)
3910 void ata_scsi_media_change_notify(struct ata_device
*dev
)
3913 sdev_evt_send_simple(dev
->sdev
, SDEV_EVT_MEDIA_CHANGE
,
3918 * ata_scsi_hotplug - SCSI part of hotplug
3919 * @work: Pointer to ATA port to perform SCSI hotplug on
3921 * Perform SCSI part of hotplug. It's executed from a separate
3922 * workqueue after EH completes. This is necessary because SCSI
3923 * hot plugging requires working EH and hot unplugging is
3924 * synchronized with hot plugging with a mutex.
3927 * Kernel thread context (may sleep).
3929 void ata_scsi_hotplug(struct work_struct
*work
)
3931 struct ata_port
*ap
=
3932 container_of(work
, struct ata_port
, hotplug_task
.work
);
3935 if (ap
->pflags
& ATA_PFLAG_UNLOADING
) {
3936 DPRINTK("ENTER/EXIT - unloading\n");
3943 * The block layer suspend/resume path is fundamentally broken due
3944 * to freezable kthreads and workqueue and may deadlock if a block
3945 * device gets removed while resume is in progress. I don't know
3946 * what the solution is short of removing freezable kthreads and
3947 * workqueues altogether.
3949 * The following is an ugly hack to avoid kicking off device
3950 * removal while freezer is active. This is a joke but does avoid
3951 * this particular deadlock scenario.
3953 * https://bugzilla.kernel.org/show_bug.cgi?id=62801
3954 * http://marc.info/?l=linux-kernel&m=138695698516487
3956 #ifdef CONFIG_FREEZER
3962 mutex_lock(&ap
->scsi_scan_mutex
);
3964 /* Unplug detached devices. We cannot use link iterator here
3965 * because PMP links have to be scanned even if PMP is
3966 * currently not attached. Iterate manually.
3968 ata_scsi_handle_link_detach(&ap
->link
);
3970 for (i
= 0; i
< SATA_PMP_MAX_PORTS
; i
++)
3971 ata_scsi_handle_link_detach(&ap
->pmp_link
[i
]);
3973 /* scan for new ones */
3974 ata_scsi_scan_host(ap
, 0);
3976 mutex_unlock(&ap
->scsi_scan_mutex
);
3981 * ata_scsi_user_scan - indication for user-initiated bus scan
3982 * @shost: SCSI host to scan
3983 * @channel: Channel to scan
3987 * This function is called when user explicitly requests bus
3988 * scan. Set probe pending flag and invoke EH.
3991 * SCSI layer (we don't care)
3996 int ata_scsi_user_scan(struct Scsi_Host
*shost
, unsigned int channel
,
3997 unsigned int id
, u64 lun
)
3999 struct ata_port
*ap
= ata_shost_to_port(shost
);
4000 unsigned long flags
;
4003 if (!ap
->ops
->error_handler
)
4006 if (lun
!= SCAN_WILD_CARD
&& lun
)
4009 if (!sata_pmp_attached(ap
)) {
4010 if (channel
!= SCAN_WILD_CARD
&& channel
)
4014 if (id
!= SCAN_WILD_CARD
&& id
)
4019 spin_lock_irqsave(ap
->lock
, flags
);
4021 if (devno
== SCAN_WILD_CARD
) {
4022 struct ata_link
*link
;
4024 ata_for_each_link(link
, ap
, EDGE
) {
4025 struct ata_eh_info
*ehi
= &link
->eh_info
;
4026 ehi
->probe_mask
|= ATA_ALL_DEVICES
;
4027 ehi
->action
|= ATA_EH_RESET
;
4030 struct ata_device
*dev
= ata_find_dev(ap
, devno
);
4033 struct ata_eh_info
*ehi
= &dev
->link
->eh_info
;
4034 ehi
->probe_mask
|= 1 << dev
->devno
;
4035 ehi
->action
|= ATA_EH_RESET
;
4041 ata_port_schedule_eh(ap
);
4042 spin_unlock_irqrestore(ap
->lock
, flags
);
4043 ata_port_wait_eh(ap
);
4045 spin_unlock_irqrestore(ap
->lock
, flags
);
4051 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
4052 * @work: Pointer to ATA port to perform scsi_rescan_device()
4054 * After ATA pass thru (SAT) commands are executed successfully,
4055 * libata need to propagate the changes to SCSI layer.
4058 * Kernel thread context (may sleep).
4060 void ata_scsi_dev_rescan(struct work_struct
*work
)
4062 struct ata_port
*ap
=
4063 container_of(work
, struct ata_port
, scsi_rescan_task
);
4064 struct ata_link
*link
;
4065 struct ata_device
*dev
;
4066 unsigned long flags
;
4068 mutex_lock(&ap
->scsi_scan_mutex
);
4069 spin_lock_irqsave(ap
->lock
, flags
);
4071 ata_for_each_link(link
, ap
, EDGE
) {
4072 ata_for_each_dev(dev
, link
, ENABLED
) {
4073 struct scsi_device
*sdev
= dev
->sdev
;
4077 if (scsi_device_get(sdev
))
4080 spin_unlock_irqrestore(ap
->lock
, flags
);
4081 scsi_rescan_device(&(sdev
->sdev_gendev
));
4082 scsi_device_put(sdev
);
4083 spin_lock_irqsave(ap
->lock
, flags
);
4087 spin_unlock_irqrestore(ap
->lock
, flags
);
4088 mutex_unlock(&ap
->scsi_scan_mutex
);
4092 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
4093 * @host: ATA host container for all SAS ports
4094 * @port_info: Information from low-level host driver
4095 * @shost: SCSI host that the scsi device is attached to
4098 * PCI/etc. bus probe sem.
4101 * ata_port pointer on success / NULL on failure.
4104 struct ata_port
*ata_sas_port_alloc(struct ata_host
*host
,
4105 struct ata_port_info
*port_info
,
4106 struct Scsi_Host
*shost
)
4108 struct ata_port
*ap
;
4110 ap
= ata_port_alloc(host
);
4115 ap
->lock
= &host
->lock
;
4116 ap
->pio_mask
= port_info
->pio_mask
;
4117 ap
->mwdma_mask
= port_info
->mwdma_mask
;
4118 ap
->udma_mask
= port_info
->udma_mask
;
4119 ap
->flags
|= port_info
->flags
;
4120 ap
->ops
= port_info
->port_ops
;
4121 ap
->cbl
= ATA_CBL_SATA
;
4125 EXPORT_SYMBOL_GPL(ata_sas_port_alloc
);
4128 * ata_sas_port_start - Set port up for dma.
4129 * @ap: Port to initialize
4131 * Called just after data structures for each port are
4134 * May be used as the port_start() entry in ata_port_operations.
4137 * Inherited from caller.
4139 int ata_sas_port_start(struct ata_port
*ap
)
4142 * the port is marked as frozen at allocation time, but if we don't
4143 * have new eh, we won't thaw it
4145 if (!ap
->ops
->error_handler
)
4146 ap
->pflags
&= ~ATA_PFLAG_FROZEN
;
4149 EXPORT_SYMBOL_GPL(ata_sas_port_start
);
4152 * ata_port_stop - Undo ata_sas_port_start()
4153 * @ap: Port to shut down
4155 * May be used as the port_stop() entry in ata_port_operations.
4158 * Inherited from caller.
4161 void ata_sas_port_stop(struct ata_port
*ap
)
4164 EXPORT_SYMBOL_GPL(ata_sas_port_stop
);
4167 * ata_sas_async_probe - simply schedule probing and return
4168 * @ap: Port to probe
4170 * For batch scheduling of probe for sas attached ata devices, assumes
4171 * the port has already been through ata_sas_port_init()
4173 void ata_sas_async_probe(struct ata_port
*ap
)
4175 __ata_port_probe(ap
);
4177 EXPORT_SYMBOL_GPL(ata_sas_async_probe
);
4179 int ata_sas_sync_probe(struct ata_port
*ap
)
4181 return ata_port_probe(ap
);
4183 EXPORT_SYMBOL_GPL(ata_sas_sync_probe
);
4187 * ata_sas_port_init - Initialize a SATA device
4188 * @ap: SATA port to initialize
4191 * PCI/etc. bus probe sem.
4194 * Zero on success, non-zero on error.
4197 int ata_sas_port_init(struct ata_port
*ap
)
4199 int rc
= ap
->ops
->port_start(ap
);
4203 ap
->print_id
= atomic_inc_return(&ata_print_id
);
4206 EXPORT_SYMBOL_GPL(ata_sas_port_init
);
4209 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
4210 * @ap: SATA port to destroy
4214 void ata_sas_port_destroy(struct ata_port
*ap
)
4216 if (ap
->ops
->port_stop
)
4217 ap
->ops
->port_stop(ap
);
4220 EXPORT_SYMBOL_GPL(ata_sas_port_destroy
);
4223 * ata_sas_slave_configure - Default slave_config routine for libata devices
4224 * @sdev: SCSI device to configure
4225 * @ap: ATA port to which SCSI device is attached
4231 int ata_sas_slave_configure(struct scsi_device
*sdev
, struct ata_port
*ap
)
4233 ata_scsi_sdev_config(sdev
);
4234 ata_scsi_dev_config(sdev
, ap
->link
.device
);
4237 EXPORT_SYMBOL_GPL(ata_sas_slave_configure
);
4240 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
4241 * @cmd: SCSI command to be sent
4242 * @ap: ATA port to which the command is being sent
4245 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
4249 int ata_sas_queuecmd(struct scsi_cmnd
*cmd
, struct ata_port
*ap
)
4253 ata_scsi_dump_cdb(ap
, cmd
);
4255 if (likely(ata_dev_enabled(ap
->link
.device
)))
4256 rc
= __ata_scsi_queuecmd(cmd
, ap
->link
.device
);
4258 cmd
->result
= (DID_BAD_TARGET
<< 16);
4259 cmd
->scsi_done(cmd
);
4263 EXPORT_SYMBOL_GPL(ata_sas_queuecmd
);
4265 int ata_sas_allocate_tag(struct ata_port
*ap
)
4267 unsigned int max_queue
= ap
->host
->n_tags
;
4268 unsigned int i
, tag
;
4270 for (i
= 0, tag
= ap
->sas_last_tag
+ 1; i
< max_queue
; i
++, tag
++) {
4271 tag
= tag
< max_queue
? tag
: 0;
4273 /* the last tag is reserved for internal command. */
4274 if (tag
== ATA_TAG_INTERNAL
)
4277 if (!test_and_set_bit(tag
, &ap
->sas_tag_allocated
)) {
4278 ap
->sas_last_tag
= tag
;
4285 void ata_sas_free_tag(unsigned int tag
, struct ata_port
*ap
)
4287 clear_bit(tag
, &ap
->sas_tag_allocated
);