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 void ata_scsi_set_sense(struct scsi_cmnd
*cmd
, u8 sk
, u8 asc
, u8 ascq
)
278 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
280 scsi_build_sense_buffer(0, cmd
->sense_buffer
, sk
, asc
, ascq
);
284 ata_scsi_em_message_store(struct device
*dev
, struct device_attribute
*attr
,
285 const char *buf
, size_t count
)
287 struct Scsi_Host
*shost
= class_to_shost(dev
);
288 struct ata_port
*ap
= ata_shost_to_port(shost
);
289 if (ap
->ops
->em_store
&& (ap
->flags
& ATA_FLAG_EM
))
290 return ap
->ops
->em_store(ap
, buf
, count
);
295 ata_scsi_em_message_show(struct device
*dev
, struct device_attribute
*attr
,
298 struct Scsi_Host
*shost
= class_to_shost(dev
);
299 struct ata_port
*ap
= ata_shost_to_port(shost
);
301 if (ap
->ops
->em_show
&& (ap
->flags
& ATA_FLAG_EM
))
302 return ap
->ops
->em_show(ap
, buf
);
305 DEVICE_ATTR(em_message
, S_IRUGO
| S_IWUSR
,
306 ata_scsi_em_message_show
, ata_scsi_em_message_store
);
307 EXPORT_SYMBOL_GPL(dev_attr_em_message
);
310 ata_scsi_em_message_type_show(struct device
*dev
, struct device_attribute
*attr
,
313 struct Scsi_Host
*shost
= class_to_shost(dev
);
314 struct ata_port
*ap
= ata_shost_to_port(shost
);
316 return snprintf(buf
, 23, "%d\n", ap
->em_message_type
);
318 DEVICE_ATTR(em_message_type
, S_IRUGO
,
319 ata_scsi_em_message_type_show
, NULL
);
320 EXPORT_SYMBOL_GPL(dev_attr_em_message_type
);
323 ata_scsi_activity_show(struct device
*dev
, struct device_attribute
*attr
,
326 struct scsi_device
*sdev
= to_scsi_device(dev
);
327 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
328 struct ata_device
*atadev
= ata_scsi_find_dev(ap
, sdev
);
330 if (atadev
&& ap
->ops
->sw_activity_show
&&
331 (ap
->flags
& ATA_FLAG_SW_ACTIVITY
))
332 return ap
->ops
->sw_activity_show(atadev
, buf
);
337 ata_scsi_activity_store(struct device
*dev
, struct device_attribute
*attr
,
338 const char *buf
, size_t count
)
340 struct scsi_device
*sdev
= to_scsi_device(dev
);
341 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
342 struct ata_device
*atadev
= ata_scsi_find_dev(ap
, sdev
);
343 enum sw_activity val
;
346 if (atadev
&& ap
->ops
->sw_activity_store
&&
347 (ap
->flags
& ATA_FLAG_SW_ACTIVITY
)) {
348 val
= simple_strtoul(buf
, NULL
, 0);
350 case OFF
: case BLINK_ON
: case BLINK_OFF
:
351 rc
= ap
->ops
->sw_activity_store(atadev
, val
);
360 DEVICE_ATTR(sw_activity
, S_IWUSR
| S_IRUGO
, ata_scsi_activity_show
,
361 ata_scsi_activity_store
);
362 EXPORT_SYMBOL_GPL(dev_attr_sw_activity
);
364 struct device_attribute
*ata_common_sdev_attrs
[] = {
365 &dev_attr_unload_heads
,
368 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs
);
370 static void ata_scsi_invalid_field(struct scsi_cmnd
*cmd
)
372 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
373 /* "Invalid field in cbd" */
378 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
379 * @sdev: SCSI device for which BIOS geometry is to be determined
380 * @bdev: block device associated with @sdev
381 * @capacity: capacity of SCSI device
382 * @geom: location to which geometry will be output
384 * Generic bios head/sector/cylinder calculator
385 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
386 * mapping. Some situations may arise where the disk is not
387 * bootable if this is not used.
390 * Defined by the SCSI layer. We don't really care.
395 int ata_std_bios_param(struct scsi_device
*sdev
, struct block_device
*bdev
,
396 sector_t capacity
, int geom
[])
400 sector_div(capacity
, 255*63);
407 * ata_scsi_unlock_native_capacity - unlock native capacity
408 * @sdev: SCSI device to adjust device capacity for
410 * This function is called if a partition on @sdev extends beyond
411 * the end of the device. It requests EH to unlock HPA.
414 * Defined by the SCSI layer. Might sleep.
416 void ata_scsi_unlock_native_capacity(struct scsi_device
*sdev
)
418 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
419 struct ata_device
*dev
;
422 spin_lock_irqsave(ap
->lock
, flags
);
424 dev
= ata_scsi_find_dev(ap
, sdev
);
425 if (dev
&& dev
->n_sectors
< dev
->n_native_sectors
) {
426 dev
->flags
|= ATA_DFLAG_UNLOCK_HPA
;
427 dev
->link
->eh_info
.action
|= ATA_EH_RESET
;
428 ata_port_schedule_eh(ap
);
431 spin_unlock_irqrestore(ap
->lock
, flags
);
432 ata_port_wait_eh(ap
);
436 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
438 * @sdev: SCSI device to get identify data for
439 * @arg: User buffer area for identify data
442 * Defined by the SCSI layer. We don't really care.
445 * Zero on success, negative errno on error.
447 static int ata_get_identity(struct ata_port
*ap
, struct scsi_device
*sdev
,
450 struct ata_device
*dev
= ata_scsi_find_dev(ap
, sdev
);
451 u16 __user
*dst
= arg
;
457 if (copy_to_user(dst
, dev
->id
, ATA_ID_WORDS
* sizeof(u16
)))
460 ata_id_string(dev
->id
, buf
, ATA_ID_PROD
, ATA_ID_PROD_LEN
);
461 if (copy_to_user(dst
+ ATA_ID_PROD
, buf
, ATA_ID_PROD_LEN
))
464 ata_id_string(dev
->id
, buf
, ATA_ID_FW_REV
, ATA_ID_FW_REV_LEN
);
465 if (copy_to_user(dst
+ ATA_ID_FW_REV
, buf
, ATA_ID_FW_REV_LEN
))
468 ata_id_string(dev
->id
, buf
, ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
469 if (copy_to_user(dst
+ ATA_ID_SERNO
, buf
, ATA_ID_SERNO_LEN
))
476 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
477 * @scsidev: Device to which we are issuing command
478 * @arg: User provided data for issuing command
481 * Defined by the SCSI layer. We don't really care.
484 * Zero on success, negative errno on error.
486 int ata_cmd_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
489 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
490 u8 args
[4], *argbuf
= NULL
, *sensebuf
= NULL
;
492 enum dma_data_direction data_dir
;
498 if (copy_from_user(args
, arg
, sizeof(args
)))
501 sensebuf
= kzalloc(SCSI_SENSE_BUFFERSIZE
, GFP_NOIO
);
505 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
508 argsize
= ATA_SECT_SIZE
* args
[3];
509 argbuf
= kmalloc(argsize
, GFP_KERNEL
);
510 if (argbuf
== NULL
) {
515 scsi_cmd
[1] = (4 << 1); /* PIO Data-in */
516 scsi_cmd
[2] = 0x0e; /* no off.line or cc, read from dev,
517 block count in sector count field */
518 data_dir
= DMA_FROM_DEVICE
;
520 scsi_cmd
[1] = (3 << 1); /* Non-data */
521 scsi_cmd
[2] = 0x20; /* cc but no off.line or data xfer */
525 scsi_cmd
[0] = ATA_16
;
527 scsi_cmd
[4] = args
[2];
528 if (args
[0] == ATA_CMD_SMART
) { /* hack -- ide driver does this too */
529 scsi_cmd
[6] = args
[3];
530 scsi_cmd
[8] = args
[1];
534 scsi_cmd
[6] = args
[1];
536 scsi_cmd
[14] = args
[0];
538 /* Good values for timeout and retries? Values below
539 from scsi_ioctl_send_command() for default case... */
540 cmd_result
= scsi_execute(scsidev
, scsi_cmd
, data_dir
, argbuf
, argsize
,
541 sensebuf
, (10*HZ
), 5, 0, NULL
);
543 if (driver_byte(cmd_result
) == DRIVER_SENSE
) {/* sense data available */
544 u8
*desc
= sensebuf
+ 8;
545 cmd_result
&= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
547 /* If we set cc then ATA pass-through will cause a
548 * check condition even if no error. Filter that. */
549 if (cmd_result
& SAM_STAT_CHECK_CONDITION
) {
550 struct scsi_sense_hdr sshdr
;
551 scsi_normalize_sense(sensebuf
, SCSI_SENSE_BUFFERSIZE
,
553 if (sshdr
.sense_key
== RECOVERED_ERROR
&&
554 sshdr
.asc
== 0 && sshdr
.ascq
== 0x1d)
555 cmd_result
&= ~SAM_STAT_CHECK_CONDITION
;
558 /* Send userspace a few ATA registers (same as drivers/ide) */
559 if (sensebuf
[0] == 0x72 && /* format is "descriptor" */
560 desc
[0] == 0x09) { /* code is "ATA Descriptor" */
561 args
[0] = desc
[13]; /* status */
562 args
[1] = desc
[3]; /* error */
563 args
[2] = desc
[5]; /* sector count (0:7) */
564 if (copy_to_user(arg
, args
, sizeof(args
)))
576 && copy_to_user(arg
+ sizeof(args
), argbuf
, argsize
))
585 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
586 * @scsidev: Device to which we are issuing command
587 * @arg: User provided data for issuing command
590 * Defined by the SCSI layer. We don't really care.
593 * Zero on success, negative errno on error.
595 int ata_task_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
598 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
599 u8 args
[7], *sensebuf
= NULL
;
605 if (copy_from_user(args
, arg
, sizeof(args
)))
608 sensebuf
= kzalloc(SCSI_SENSE_BUFFERSIZE
, GFP_NOIO
);
612 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
613 scsi_cmd
[0] = ATA_16
;
614 scsi_cmd
[1] = (3 << 1); /* Non-data */
615 scsi_cmd
[2] = 0x20; /* cc but no off.line or data xfer */
616 scsi_cmd
[4] = args
[1];
617 scsi_cmd
[6] = args
[2];
618 scsi_cmd
[8] = args
[3];
619 scsi_cmd
[10] = args
[4];
620 scsi_cmd
[12] = args
[5];
621 scsi_cmd
[13] = args
[6] & 0x4f;
622 scsi_cmd
[14] = args
[0];
624 /* Good values for timeout and retries? Values below
625 from scsi_ioctl_send_command() for default case... */
626 cmd_result
= scsi_execute(scsidev
, scsi_cmd
, DMA_NONE
, NULL
, 0,
627 sensebuf
, (10*HZ
), 5, 0, NULL
);
629 if (driver_byte(cmd_result
) == DRIVER_SENSE
) {/* sense data available */
630 u8
*desc
= sensebuf
+ 8;
631 cmd_result
&= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
633 /* If we set cc then ATA pass-through will cause a
634 * check condition even if no error. Filter that. */
635 if (cmd_result
& SAM_STAT_CHECK_CONDITION
) {
636 struct scsi_sense_hdr sshdr
;
637 scsi_normalize_sense(sensebuf
, SCSI_SENSE_BUFFERSIZE
,
639 if (sshdr
.sense_key
== RECOVERED_ERROR
&&
640 sshdr
.asc
== 0 && sshdr
.ascq
== 0x1d)
641 cmd_result
&= ~SAM_STAT_CHECK_CONDITION
;
644 /* Send userspace ATA registers */
645 if (sensebuf
[0] == 0x72 && /* format is "descriptor" */
646 desc
[0] == 0x09) {/* code is "ATA Descriptor" */
647 args
[0] = desc
[13]; /* status */
648 args
[1] = desc
[3]; /* error */
649 args
[2] = desc
[5]; /* sector count (0:7) */
650 args
[3] = desc
[7]; /* lbal */
651 args
[4] = desc
[9]; /* lbam */
652 args
[5] = desc
[11]; /* lbah */
653 args
[6] = desc
[12]; /* select */
654 if (copy_to_user(arg
, args
, sizeof(args
)))
669 static int ata_ioc32(struct ata_port
*ap
)
671 if (ap
->flags
& ATA_FLAG_PIO_DMA
)
673 if (ap
->pflags
& ATA_PFLAG_PIO32
)
678 int ata_sas_scsi_ioctl(struct ata_port
*ap
, struct scsi_device
*scsidev
,
679 int cmd
, void __user
*arg
)
681 int val
= -EINVAL
, rc
= -EINVAL
;
685 case ATA_IOC_GET_IO32
:
686 spin_lock_irqsave(ap
->lock
, flags
);
688 spin_unlock_irqrestore(ap
->lock
, flags
);
689 if (copy_to_user(arg
, &val
, 1))
693 case ATA_IOC_SET_IO32
:
694 val
= (unsigned long) arg
;
696 spin_lock_irqsave(ap
->lock
, flags
);
697 if (ap
->pflags
& ATA_PFLAG_PIO32CHANGE
) {
699 ap
->pflags
|= ATA_PFLAG_PIO32
;
701 ap
->pflags
&= ~ATA_PFLAG_PIO32
;
703 if (val
!= ata_ioc32(ap
))
706 spin_unlock_irqrestore(ap
->lock
, flags
);
709 case HDIO_GET_IDENTITY
:
710 return ata_get_identity(ap
, scsidev
, arg
);
713 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
715 return ata_cmd_ioctl(scsidev
, arg
);
717 case HDIO_DRIVE_TASK
:
718 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
720 return ata_task_ioctl(scsidev
, arg
);
729 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl
);
731 int ata_scsi_ioctl(struct scsi_device
*scsidev
, int cmd
, void __user
*arg
)
733 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev
->host
),
736 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
739 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
740 * @dev: ATA device to which the new command is attached
741 * @cmd: SCSI command that originated this ATA command
743 * Obtain a reference to an unused ata_queued_cmd structure,
744 * which is the basic libata structure representing a single
745 * ATA command sent to the hardware.
747 * If a command was available, fill in the SCSI-specific
748 * portions of the structure with information on the
752 * spin_lock_irqsave(host lock)
755 * Command allocated, or %NULL if none available.
757 static struct ata_queued_cmd
*ata_scsi_qc_new(struct ata_device
*dev
,
758 struct scsi_cmnd
*cmd
)
760 struct ata_queued_cmd
*qc
;
762 qc
= ata_qc_new_init(dev
, cmd
->request
->tag
);
765 qc
->scsidone
= cmd
->scsi_done
;
767 qc
->sg
= scsi_sglist(cmd
);
768 qc
->n_elem
= scsi_sg_count(cmd
);
770 cmd
->result
= (DID_OK
<< 16) | (QUEUE_FULL
<< 1);
777 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd
*qc
)
779 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
781 qc
->extrabytes
= scmd
->request
->extra_len
;
782 qc
->nbytes
= scsi_bufflen(scmd
) + qc
->extrabytes
;
786 * ata_dump_status - user friendly display of error info
787 * @id: id of the port in question
788 * @tf: ptr to filled out taskfile
790 * Decode and dump the ATA error/status registers for the user so
791 * that they have some idea what really happened at the non
792 * make-believe layer.
795 * inherited from caller
797 static void ata_dump_status(unsigned id
, struct ata_taskfile
*tf
)
799 u8 stat
= tf
->command
, err
= tf
->feature
;
801 printk(KERN_WARNING
"ata%u: status=0x%02x { ", id
, stat
);
802 if (stat
& ATA_BUSY
) {
803 printk("Busy }\n"); /* Data is not valid in this case */
805 if (stat
& ATA_DRDY
) printk("DriveReady ");
806 if (stat
& ATA_DF
) printk("DeviceFault ");
807 if (stat
& ATA_DSC
) printk("SeekComplete ");
808 if (stat
& ATA_DRQ
) printk("DataRequest ");
809 if (stat
& ATA_CORR
) printk("CorrectedError ");
810 if (stat
& ATA_SENSE
) printk("Sense ");
811 if (stat
& ATA_ERR
) printk("Error ");
815 printk(KERN_WARNING
"ata%u: error=0x%02x { ", id
, err
);
816 if (err
& ATA_ABORTED
) printk("DriveStatusError ");
817 if (err
& ATA_ICRC
) {
818 if (err
& ATA_ABORTED
)
820 else printk("Sector ");
822 if (err
& ATA_UNC
) printk("UncorrectableError ");
823 if (err
& ATA_IDNF
) printk("SectorIdNotFound ");
824 if (err
& ATA_TRK0NF
) printk("TrackZeroNotFound ");
825 if (err
& ATA_AMNF
) printk("AddrMarkNotFound ");
832 * ata_to_sense_error - convert ATA error to SCSI error
833 * @id: ATA device number
834 * @drv_stat: value contained in ATA status register
835 * @drv_err: value contained in ATA error register
836 * @sk: the sense key we'll fill out
837 * @asc: the additional sense code we'll fill out
838 * @ascq: the additional sense code qualifier we'll fill out
839 * @verbose: be verbose
841 * Converts an ATA error into a SCSI error. Fill out pointers to
842 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
843 * format sense blocks.
846 * spin_lock_irqsave(host lock)
848 static void ata_to_sense_error(unsigned id
, u8 drv_stat
, u8 drv_err
, u8
*sk
,
849 u8
*asc
, u8
*ascq
, int verbose
)
853 /* Based on the 3ware driver translation table */
854 static const unsigned char sense_table
[][4] = {
856 {0xd1, ABORTED_COMMAND
, 0x00, 0x00},
857 // Device busy Aborted command
859 {0xd0, ABORTED_COMMAND
, 0x00, 0x00},
860 // Device busy Aborted command
862 {0x61, HARDWARE_ERROR
, 0x00, 0x00},
863 // Device fault Hardware error
864 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
865 {0x84, ABORTED_COMMAND
, 0x47, 0x00},
866 // Data CRC error SCSI parity error
867 /* MC|ID|ABRT|TRK0|MARK */
868 {0x37, NOT_READY
, 0x04, 0x00},
869 // Unit offline Not ready
871 {0x09, NOT_READY
, 0x04, 0x00},
872 // Unrecovered disk error Not ready
873 /* Bad address mark */
874 {0x01, MEDIUM_ERROR
, 0x13, 0x00},
875 // Address mark not found for data field
876 /* TRK0 - Track 0 not found */
877 {0x02, HARDWARE_ERROR
, 0x00, 0x00},
879 /* Abort: 0x04 is not translated here, see below */
880 /* Media change request */
881 {0x08, NOT_READY
, 0x04, 0x00},
882 // FIXME: faking offline
883 /* SRV/IDNF - ID not found */
884 {0x10, ILLEGAL_REQUEST
, 0x21, 0x00},
885 // Logical address out of range
886 /* MC - Media Changed */
887 {0x20, UNIT_ATTENTION
, 0x28, 0x00},
888 // Not ready to ready change, medium may have changed
889 /* ECC - Uncorrectable ECC error */
890 {0x40, MEDIUM_ERROR
, 0x11, 0x04},
891 // Unrecovered read error
892 /* BBD - block marked bad */
893 {0x80, MEDIUM_ERROR
, 0x11, 0x04},
894 // Block marked bad Medium error, unrecovered read error
895 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
897 static const unsigned char stat_table
[][4] = {
898 /* Must be first because BUSY means no other bits valid */
899 {0x80, ABORTED_COMMAND
, 0x47, 0x00},
900 // Busy, fake parity for now
901 {0x40, ILLEGAL_REQUEST
, 0x21, 0x04},
902 // Device ready, unaligned write command
903 {0x20, HARDWARE_ERROR
, 0x44, 0x00},
904 // Device fault, internal target failure
905 {0x08, ABORTED_COMMAND
, 0x47, 0x00},
906 // Timed out in xfer, fake parity for now
907 {0x04, RECOVERED_ERROR
, 0x11, 0x00},
908 // Recovered ECC error Medium error, recovered
909 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
913 * Is this an error we can process/parse
915 if (drv_stat
& ATA_BUSY
) {
916 drv_err
= 0; /* Ignore the err bits, they're invalid */
920 /* Look for drv_err */
921 for (i
= 0; sense_table
[i
][0] != 0xFF; i
++) {
922 /* Look for best matches first */
923 if ((sense_table
[i
][0] & drv_err
) ==
925 *sk
= sense_table
[i
][1];
926 *asc
= sense_table
[i
][2];
927 *ascq
= sense_table
[i
][3];
934 * Fall back to interpreting status bits. Note that if the drv_err
935 * has only the ABRT bit set, we decode drv_stat. ABRT by itself
936 * is not descriptive enough.
938 for (i
= 0; stat_table
[i
][0] != 0xFF; i
++) {
939 if (stat_table
[i
][0] & drv_stat
) {
940 *sk
= stat_table
[i
][1];
941 *asc
= stat_table
[i
][2];
942 *ascq
= stat_table
[i
][3];
948 * We need a sensible error return here, which is tricky, and one
949 * that won't cause people to do things like return a disk wrongly.
951 *sk
= ABORTED_COMMAND
;
957 printk(KERN_ERR
"ata%u: translated ATA stat/err 0x%02x/%02x "
958 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
959 id
, drv_stat
, drv_err
, *sk
, *asc
, *ascq
);
964 * ata_gen_passthru_sense - Generate check condition sense block.
965 * @qc: Command that completed.
967 * This function is specific to the ATA descriptor format sense
968 * block specified for the ATA pass through commands. Regardless
969 * of whether the command errored or not, return a sense
970 * block. Copy all controller registers into the sense
971 * block. If there was no error, we get the request from an ATA
972 * passthrough command, so we use the following sense data:
973 * sk = RECOVERED ERROR
974 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
980 static void ata_gen_passthru_sense(struct ata_queued_cmd
*qc
)
982 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
983 struct ata_taskfile
*tf
= &qc
->result_tf
;
984 unsigned char *sb
= cmd
->sense_buffer
;
985 unsigned char *desc
= sb
+ 8;
986 int verbose
= qc
->ap
->ops
->error_handler
== NULL
;
988 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
990 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
993 * Use ata_to_sense_error() to map status register bits
994 * onto sense key, asc & ascq.
997 tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
998 ata_to_sense_error(qc
->ap
->print_id
, tf
->command
, tf
->feature
,
999 &sb
[1], &sb
[2], &sb
[3], verbose
);
1002 sb
[1] = RECOVERED_ERROR
;
1008 * Sense data is current and format is descriptor.
1014 /* set length of additional sense data */
1019 * Copy registers into sense buffer.
1022 desc
[3] = tf
->feature
; /* == error reg */
1023 desc
[5] = tf
->nsect
;
1026 desc
[11] = tf
->lbah
;
1027 desc
[12] = tf
->device
;
1028 desc
[13] = tf
->command
; /* == status reg */
1031 * Fill in Extend bit, and the high order bytes
1034 if (tf
->flags
& ATA_TFLAG_LBA48
) {
1036 desc
[4] = tf
->hob_nsect
;
1037 desc
[6] = tf
->hob_lbal
;
1038 desc
[8] = tf
->hob_lbam
;
1039 desc
[10] = tf
->hob_lbah
;
1044 * ata_gen_ata_sense - generate a SCSI fixed sense block
1045 * @qc: Command that we are erroring out
1047 * Generate sense block for a failed ATA command @qc. Descriptor
1048 * format is used to accommodate LBA48 block address.
1053 static void ata_gen_ata_sense(struct ata_queued_cmd
*qc
)
1055 struct ata_device
*dev
= qc
->dev
;
1056 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1057 struct ata_taskfile
*tf
= &qc
->result_tf
;
1058 unsigned char *sb
= cmd
->sense_buffer
;
1059 unsigned char *desc
= sb
+ 8;
1060 int verbose
= qc
->ap
->ops
->error_handler
== NULL
;
1063 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
1065 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
1067 /* sense data is current and format is descriptor */
1070 /* Use ata_to_sense_error() to map status register bits
1071 * onto sense key, asc & ascq.
1074 tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
1075 ata_to_sense_error(qc
->ap
->print_id
, tf
->command
, tf
->feature
,
1076 &sb
[1], &sb
[2], &sb
[3], verbose
);
1080 block
= ata_tf_read_block(&qc
->result_tf
, dev
);
1082 /* information sense data descriptor */
1087 desc
[2] |= 0x80; /* valid */
1088 desc
[6] = block
>> 40;
1089 desc
[7] = block
>> 32;
1090 desc
[8] = block
>> 24;
1091 desc
[9] = block
>> 16;
1092 desc
[10] = block
>> 8;
1096 static void ata_scsi_sdev_config(struct scsi_device
*sdev
)
1098 sdev
->use_10_for_rw
= 1;
1099 sdev
->use_10_for_ms
= 1;
1100 sdev
->no_report_opcodes
= 1;
1101 sdev
->no_write_same
= 1;
1103 /* Schedule policy is determined by ->qc_defer() callback and
1104 * it needs to see every deferred qc. Set dev_blocked to 1 to
1105 * prevent SCSI midlayer from automatically deferring
1108 sdev
->max_device_blocked
= 1;
1112 * atapi_drain_needed - Check whether data transfer may overflow
1113 * @rq: request to be checked
1115 * ATAPI commands which transfer variable length data to host
1116 * might overflow due to application error or hardare bug. This
1117 * function checks whether overflow should be drained and ignored
1124 * 1 if ; otherwise, 0.
1126 static int atapi_drain_needed(struct request
*rq
)
1128 if (likely(rq
->cmd_type
!= REQ_TYPE_BLOCK_PC
))
1131 if (!blk_rq_bytes(rq
) || (rq
->cmd_flags
& REQ_WRITE
))
1134 return atapi_cmd_type(rq
->cmd
[0]) == ATAPI_MISC
;
1137 static int ata_scsi_dev_config(struct scsi_device
*sdev
,
1138 struct ata_device
*dev
)
1140 struct request_queue
*q
= sdev
->request_queue
;
1142 if (!ata_id_has_unload(dev
->id
))
1143 dev
->flags
|= ATA_DFLAG_NO_UNLOAD
;
1145 /* configure max sectors */
1146 blk_queue_max_hw_sectors(q
, dev
->max_sectors
);
1148 if (dev
->class == ATA_DEV_ATAPI
) {
1151 sdev
->sector_size
= ATA_SECT_SIZE
;
1153 /* set DMA padding */
1154 blk_queue_update_dma_pad(q
, ATA_DMA_PAD_SZ
- 1);
1156 /* configure draining */
1157 buf
= kmalloc(ATAPI_MAX_DRAIN
, q
->bounce_gfp
| GFP_KERNEL
);
1159 ata_dev_err(dev
, "drain buffer allocation failed\n");
1163 blk_queue_dma_drain(q
, atapi_drain_needed
, buf
, ATAPI_MAX_DRAIN
);
1165 sdev
->sector_size
= ata_id_logical_sector_size(dev
->id
);
1166 sdev
->manage_start_stop
= 1;
1170 * ata_pio_sectors() expects buffer for each sector to not cross
1171 * page boundary. Enforce it by requiring buffers to be sector
1172 * aligned, which works iff sector_size is not larger than
1173 * PAGE_SIZE. ATAPI devices also need the alignment as
1174 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1176 if (sdev
->sector_size
> PAGE_SIZE
)
1178 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1181 blk_queue_update_dma_alignment(q
, sdev
->sector_size
- 1);
1183 if (dev
->flags
& ATA_DFLAG_AN
)
1184 set_bit(SDEV_EVT_MEDIA_CHANGE
, sdev
->supported_events
);
1186 if (dev
->flags
& ATA_DFLAG_NCQ
) {
1189 depth
= min(sdev
->host
->can_queue
, ata_id_queue_depth(dev
->id
));
1190 depth
= min(ATA_MAX_QUEUE
- 1, depth
);
1191 scsi_change_queue_depth(sdev
, depth
);
1194 blk_queue_flush_queueable(q
, false);
1201 * ata_scsi_slave_config - Set SCSI device attributes
1202 * @sdev: SCSI device to examine
1204 * This is called before we actually start reading
1205 * and writing to the device, to configure certain
1206 * SCSI mid-layer behaviors.
1209 * Defined by SCSI layer. We don't really care.
1212 int ata_scsi_slave_config(struct scsi_device
*sdev
)
1214 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1215 struct ata_device
*dev
= __ata_scsi_find_dev(ap
, sdev
);
1218 ata_scsi_sdev_config(sdev
);
1221 rc
= ata_scsi_dev_config(sdev
, dev
);
1227 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1228 * @sdev: SCSI device to be destroyed
1230 * @sdev is about to be destroyed for hot/warm unplugging. If
1231 * this unplugging was initiated by libata as indicated by NULL
1232 * dev->sdev, this function doesn't have to do anything.
1233 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1234 * Clear dev->sdev, schedule the device for ATA detach and invoke
1238 * Defined by SCSI layer. We don't really care.
1240 void ata_scsi_slave_destroy(struct scsi_device
*sdev
)
1242 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1243 struct request_queue
*q
= sdev
->request_queue
;
1244 unsigned long flags
;
1245 struct ata_device
*dev
;
1247 if (!ap
->ops
->error_handler
)
1250 spin_lock_irqsave(ap
->lock
, flags
);
1251 dev
= __ata_scsi_find_dev(ap
, sdev
);
1252 if (dev
&& dev
->sdev
) {
1253 /* SCSI device already in CANCEL state, no need to offline it */
1255 dev
->flags
|= ATA_DFLAG_DETACH
;
1256 ata_port_schedule_eh(ap
);
1258 spin_unlock_irqrestore(ap
->lock
, flags
);
1260 kfree(q
->dma_drain_buffer
);
1261 q
->dma_drain_buffer
= NULL
;
1262 q
->dma_drain_size
= 0;
1266 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth
1267 * @ap: ATA port to which the device change the queue depth
1268 * @sdev: SCSI device to configure queue depth for
1269 * @queue_depth: new queue depth
1271 * libsas and libata have different approaches for associating a sdev to
1275 int __ata_change_queue_depth(struct ata_port
*ap
, struct scsi_device
*sdev
,
1278 struct ata_device
*dev
;
1279 unsigned long flags
;
1281 if (queue_depth
< 1 || queue_depth
== sdev
->queue_depth
)
1282 return sdev
->queue_depth
;
1284 dev
= ata_scsi_find_dev(ap
, sdev
);
1285 if (!dev
|| !ata_dev_enabled(dev
))
1286 return sdev
->queue_depth
;
1289 spin_lock_irqsave(ap
->lock
, flags
);
1290 dev
->flags
&= ~ATA_DFLAG_NCQ_OFF
;
1291 if (queue_depth
== 1 || !ata_ncq_enabled(dev
)) {
1292 dev
->flags
|= ATA_DFLAG_NCQ_OFF
;
1295 spin_unlock_irqrestore(ap
->lock
, flags
);
1297 /* limit and apply queue depth */
1298 queue_depth
= min(queue_depth
, sdev
->host
->can_queue
);
1299 queue_depth
= min(queue_depth
, ata_id_queue_depth(dev
->id
));
1300 queue_depth
= min(queue_depth
, ATA_MAX_QUEUE
- 1);
1302 if (sdev
->queue_depth
== queue_depth
)
1305 return scsi_change_queue_depth(sdev
, queue_depth
);
1309 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1310 * @sdev: SCSI device to configure queue depth for
1311 * @queue_depth: new queue depth
1313 * This is libata standard hostt->change_queue_depth callback.
1314 * SCSI will call into this callback when user tries to set queue
1318 * SCSI layer (we don't care)
1321 * Newly configured queue depth.
1323 int ata_scsi_change_queue_depth(struct scsi_device
*sdev
, int queue_depth
)
1325 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1327 return __ata_change_queue_depth(ap
, sdev
, queue_depth
);
1331 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1332 * @qc: Storage for translated ATA taskfile
1334 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1335 * (to start). Perhaps these commands should be preceded by
1336 * CHECK POWER MODE to see what power mode the device is already in.
1337 * [See SAT revision 5 at www.t10.org]
1340 * spin_lock_irqsave(host lock)
1343 * Zero on success, non-zero on error.
1345 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd
*qc
)
1347 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1348 struct ata_taskfile
*tf
= &qc
->tf
;
1349 const u8
*cdb
= scmd
->cmnd
;
1351 if (scmd
->cmd_len
< 5)
1354 tf
->flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1355 tf
->protocol
= ATA_PROT_NODATA
;
1357 ; /* ignore IMMED bit, violates sat-r05 */
1360 goto invalid_fld
; /* LOEJ bit set not supported */
1361 if (((cdb
[4] >> 4) & 0xf) != 0)
1362 goto invalid_fld
; /* power conditions not supported */
1365 tf
->nsect
= 1; /* 1 sector, lba=0 */
1367 if (qc
->dev
->flags
& ATA_DFLAG_LBA
) {
1368 tf
->flags
|= ATA_TFLAG_LBA
;
1373 tf
->device
|= ATA_LBA
;
1376 tf
->lbal
= 0x1; /* sect */
1377 tf
->lbam
= 0x0; /* cyl low */
1378 tf
->lbah
= 0x0; /* cyl high */
1381 tf
->command
= ATA_CMD_VERIFY
; /* READ VERIFY */
1383 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1384 * or S5) causing some drives to spin up and down again.
1386 if ((qc
->ap
->flags
& ATA_FLAG_NO_POWEROFF_SPINDOWN
) &&
1387 system_state
== SYSTEM_POWER_OFF
)
1390 if ((qc
->ap
->flags
& ATA_FLAG_NO_HIBERNATE_SPINDOWN
) &&
1391 system_entering_hibernation())
1394 /* Issue ATA STANDBY IMMEDIATE command */
1395 tf
->command
= ATA_CMD_STANDBYNOW1
;
1399 * Standby and Idle condition timers could be implemented but that
1400 * would require libata to implement the Power condition mode page
1401 * and allow the user to change it. Changing mode pages requires
1402 * MODE SELECT to be implemented.
1408 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1409 /* "Invalid field in cbd" */
1412 scmd
->result
= SAM_STAT_GOOD
;
1418 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1419 * @qc: Storage for translated ATA taskfile
1421 * Sets up an ATA taskfile to issue FLUSH CACHE or
1425 * spin_lock_irqsave(host lock)
1428 * Zero on success, non-zero on error.
1430 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd
*qc
)
1432 struct ata_taskfile
*tf
= &qc
->tf
;
1434 tf
->flags
|= ATA_TFLAG_DEVICE
;
1435 tf
->protocol
= ATA_PROT_NODATA
;
1437 if (qc
->dev
->flags
& ATA_DFLAG_FLUSH_EXT
)
1438 tf
->command
= ATA_CMD_FLUSH_EXT
;
1440 tf
->command
= ATA_CMD_FLUSH
;
1442 /* flush is critical for IO integrity, consider it an IO command */
1443 qc
->flags
|= ATA_QCFLAG_IO
;
1449 * scsi_6_lba_len - Get LBA and transfer length
1450 * @cdb: SCSI command to translate
1452 * Calculate LBA and transfer length for 6-byte commands.
1456 * @plen: the transfer length
1458 static void scsi_6_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1463 VPRINTK("six-byte command\n");
1465 lba
|= ((u64
)(cdb
[1] & 0x1f)) << 16;
1466 lba
|= ((u64
)cdb
[2]) << 8;
1467 lba
|= ((u64
)cdb
[3]);
1476 * scsi_10_lba_len - Get LBA and transfer length
1477 * @cdb: SCSI command to translate
1479 * Calculate LBA and transfer length for 10-byte commands.
1483 * @plen: the transfer length
1485 static void scsi_10_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1490 VPRINTK("ten-byte command\n");
1492 lba
|= ((u64
)cdb
[2]) << 24;
1493 lba
|= ((u64
)cdb
[3]) << 16;
1494 lba
|= ((u64
)cdb
[4]) << 8;
1495 lba
|= ((u64
)cdb
[5]);
1497 len
|= ((u32
)cdb
[7]) << 8;
1498 len
|= ((u32
)cdb
[8]);
1505 * scsi_16_lba_len - Get LBA and transfer length
1506 * @cdb: SCSI command to translate
1508 * Calculate LBA and transfer length for 16-byte commands.
1512 * @plen: the transfer length
1514 static void scsi_16_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1519 VPRINTK("sixteen-byte command\n");
1521 lba
|= ((u64
)cdb
[2]) << 56;
1522 lba
|= ((u64
)cdb
[3]) << 48;
1523 lba
|= ((u64
)cdb
[4]) << 40;
1524 lba
|= ((u64
)cdb
[5]) << 32;
1525 lba
|= ((u64
)cdb
[6]) << 24;
1526 lba
|= ((u64
)cdb
[7]) << 16;
1527 lba
|= ((u64
)cdb
[8]) << 8;
1528 lba
|= ((u64
)cdb
[9]);
1530 len
|= ((u32
)cdb
[10]) << 24;
1531 len
|= ((u32
)cdb
[11]) << 16;
1532 len
|= ((u32
)cdb
[12]) << 8;
1533 len
|= ((u32
)cdb
[13]);
1540 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1541 * @qc: Storage for translated ATA taskfile
1543 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1546 * spin_lock_irqsave(host lock)
1549 * Zero on success, non-zero on error.
1551 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd
*qc
)
1553 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1554 struct ata_taskfile
*tf
= &qc
->tf
;
1555 struct ata_device
*dev
= qc
->dev
;
1556 u64 dev_sectors
= qc
->dev
->n_sectors
;
1557 const u8
*cdb
= scmd
->cmnd
;
1561 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1562 tf
->protocol
= ATA_PROT_NODATA
;
1564 if (cdb
[0] == VERIFY
) {
1565 if (scmd
->cmd_len
< 10)
1567 scsi_10_lba_len(cdb
, &block
, &n_block
);
1568 } else if (cdb
[0] == VERIFY_16
) {
1569 if (scmd
->cmd_len
< 16)
1571 scsi_16_lba_len(cdb
, &block
, &n_block
);
1577 if (block
>= dev_sectors
)
1579 if ((block
+ n_block
) > dev_sectors
)
1582 if (dev
->flags
& ATA_DFLAG_LBA
) {
1583 tf
->flags
|= ATA_TFLAG_LBA
;
1585 if (lba_28_ok(block
, n_block
)) {
1587 tf
->command
= ATA_CMD_VERIFY
;
1588 tf
->device
|= (block
>> 24) & 0xf;
1589 } else if (lba_48_ok(block
, n_block
)) {
1590 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
1594 tf
->flags
|= ATA_TFLAG_LBA48
;
1595 tf
->command
= ATA_CMD_VERIFY_EXT
;
1597 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
1599 tf
->hob_lbah
= (block
>> 40) & 0xff;
1600 tf
->hob_lbam
= (block
>> 32) & 0xff;
1601 tf
->hob_lbal
= (block
>> 24) & 0xff;
1603 /* request too large even for LBA48 */
1606 tf
->nsect
= n_block
& 0xff;
1608 tf
->lbah
= (block
>> 16) & 0xff;
1609 tf
->lbam
= (block
>> 8) & 0xff;
1610 tf
->lbal
= block
& 0xff;
1612 tf
->device
|= ATA_LBA
;
1615 u32 sect
, head
, cyl
, track
;
1617 if (!lba_28_ok(block
, n_block
))
1620 /* Convert LBA to CHS */
1621 track
= (u32
)block
/ dev
->sectors
;
1622 cyl
= track
/ dev
->heads
;
1623 head
= track
% dev
->heads
;
1624 sect
= (u32
)block
% dev
->sectors
+ 1;
1626 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1627 (u32
)block
, track
, cyl
, head
, sect
);
1629 /* Check whether the converted CHS can fit.
1633 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
1636 tf
->command
= ATA_CMD_VERIFY
;
1637 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
1640 tf
->lbah
= cyl
>> 8;
1647 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1648 /* "Invalid field in cbd" */
1652 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1653 /* "Logical Block Address out of range" */
1657 scmd
->result
= SAM_STAT_GOOD
;
1662 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1663 * @qc: Storage for translated ATA taskfile
1665 * Converts any of six SCSI read/write commands into the
1666 * ATA counterpart, including starting sector (LBA),
1667 * sector count, and taking into account the device's LBA48
1670 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1671 * %WRITE_16 are currently supported.
1674 * spin_lock_irqsave(host lock)
1677 * Zero on success, non-zero on error.
1679 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd
*qc
)
1681 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1682 const u8
*cdb
= scmd
->cmnd
;
1683 unsigned int tf_flags
= 0;
1688 if (cdb
[0] == WRITE_10
|| cdb
[0] == WRITE_6
|| cdb
[0] == WRITE_16
)
1689 tf_flags
|= ATA_TFLAG_WRITE
;
1691 /* Calculate the SCSI LBA, transfer length and FUA. */
1695 if (unlikely(scmd
->cmd_len
< 10))
1697 scsi_10_lba_len(cdb
, &block
, &n_block
);
1698 if (cdb
[1] & (1 << 3))
1699 tf_flags
|= ATA_TFLAG_FUA
;
1703 if (unlikely(scmd
->cmd_len
< 6))
1705 scsi_6_lba_len(cdb
, &block
, &n_block
);
1707 /* for 6-byte r/w commands, transfer length 0
1708 * means 256 blocks of data, not 0 block.
1715 if (unlikely(scmd
->cmd_len
< 16))
1717 scsi_16_lba_len(cdb
, &block
, &n_block
);
1718 if (cdb
[1] & (1 << 3))
1719 tf_flags
|= ATA_TFLAG_FUA
;
1722 DPRINTK("no-byte command\n");
1726 /* Check and compose ATA command */
1728 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1729 * length 0 means transfer 0 block of data.
1730 * However, for ATA R/W commands, sector count 0 means
1731 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1733 * WARNING: one or two older ATA drives treat 0 as 0...
1737 qc
->flags
|= ATA_QCFLAG_IO
;
1738 qc
->nbytes
= n_block
* scmd
->device
->sector_size
;
1740 rc
= ata_build_rw_tf(&qc
->tf
, qc
->dev
, block
, n_block
, tf_flags
,
1742 if (likely(rc
== 0))
1747 /* treat all other errors as -EINVAL, fall through */
1749 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1750 /* "Invalid field in cbd" */
1754 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1755 /* "Logical Block Address out of range" */
1759 scmd
->result
= SAM_STAT_GOOD
;
1763 static void ata_scsi_qc_complete(struct ata_queued_cmd
*qc
)
1765 struct ata_port
*ap
= qc
->ap
;
1766 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1767 u8
*cdb
= cmd
->cmnd
;
1768 int need_sense
= (qc
->err_mask
!= 0);
1770 /* For ATA pass thru (SAT) commands, generate a sense block if
1771 * user mandated it or if there's an error. Note that if we
1772 * generate because the user forced us to [CK_COND =1], a check
1773 * condition is generated and the ATA register values are returned
1774 * whether the command completed successfully or not. If there
1775 * was no error, we use the following sense data:
1776 * sk = RECOVERED ERROR
1777 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1779 if (((cdb
[0] == ATA_16
) || (cdb
[0] == ATA_12
)) &&
1780 ((cdb
[2] & 0x20) || need_sense
)) {
1781 ata_gen_passthru_sense(qc
);
1783 if (qc
->flags
& ATA_QCFLAG_SENSE_VALID
) {
1784 cmd
->result
= SAM_STAT_CHECK_CONDITION
;
1785 } else if (!need_sense
) {
1786 cmd
->result
= SAM_STAT_GOOD
;
1788 /* TODO: decide which descriptor format to use
1789 * for 48b LBA devices and call that here
1790 * instead of the fixed desc, which is only
1791 * good for smaller LBA (and maybe CHS?)
1794 ata_gen_ata_sense(qc
);
1798 if (need_sense
&& !ap
->ops
->error_handler
)
1799 ata_dump_status(ap
->print_id
, &qc
->result_tf
);
1807 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1808 * @dev: ATA device to which the command is addressed
1809 * @cmd: SCSI command to execute
1810 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1812 * Our ->queuecommand() function has decided that the SCSI
1813 * command issued can be directly translated into an ATA
1814 * command, rather than handled internally.
1816 * This function sets up an ata_queued_cmd structure for the
1817 * SCSI command, and sends that ata_queued_cmd to the hardware.
1819 * The xlat_func argument (actor) returns 0 if ready to execute
1820 * ATA command, else 1 to finish translation. If 1 is returned
1821 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1822 * to be set reflecting an error condition or clean (early)
1826 * spin_lock_irqsave(host lock)
1829 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1830 * needs to be deferred.
1832 static int ata_scsi_translate(struct ata_device
*dev
, struct scsi_cmnd
*cmd
,
1833 ata_xlat_func_t xlat_func
)
1835 struct ata_port
*ap
= dev
->link
->ap
;
1836 struct ata_queued_cmd
*qc
;
1841 qc
= ata_scsi_qc_new(dev
, cmd
);
1845 /* data is present; dma-map it */
1846 if (cmd
->sc_data_direction
== DMA_FROM_DEVICE
||
1847 cmd
->sc_data_direction
== DMA_TO_DEVICE
) {
1848 if (unlikely(scsi_bufflen(cmd
) < 1)) {
1849 ata_dev_warn(dev
, "WARNING: zero len r/w req\n");
1853 ata_sg_init(qc
, scsi_sglist(cmd
), scsi_sg_count(cmd
));
1855 qc
->dma_dir
= cmd
->sc_data_direction
;
1858 qc
->complete_fn
= ata_scsi_qc_complete
;
1863 if (ap
->ops
->qc_defer
) {
1864 if ((rc
= ap
->ops
->qc_defer(qc
)))
1868 /* select device, send command to hardware */
1876 cmd
->scsi_done(cmd
);
1877 DPRINTK("EXIT - early finish (good or error)\n");
1882 cmd
->result
= (DID_ERROR
<< 16);
1883 cmd
->scsi_done(cmd
);
1885 DPRINTK("EXIT - internal\n");
1890 DPRINTK("EXIT - defer\n");
1891 if (rc
== ATA_DEFER_LINK
)
1892 return SCSI_MLQUEUE_DEVICE_BUSY
;
1894 return SCSI_MLQUEUE_HOST_BUSY
;
1898 * ata_scsi_rbuf_get - Map response buffer.
1899 * @cmd: SCSI command containing buffer to be mapped.
1900 * @flags: unsigned long variable to store irq enable status
1901 * @copy_in: copy in from user buffer
1903 * Prepare buffer for simulated SCSI commands.
1906 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
1909 * Pointer to response buffer.
1911 static void *ata_scsi_rbuf_get(struct scsi_cmnd
*cmd
, bool copy_in
,
1912 unsigned long *flags
)
1914 spin_lock_irqsave(&ata_scsi_rbuf_lock
, *flags
);
1916 memset(ata_scsi_rbuf
, 0, ATA_SCSI_RBUF_SIZE
);
1918 sg_copy_to_buffer(scsi_sglist(cmd
), scsi_sg_count(cmd
),
1919 ata_scsi_rbuf
, ATA_SCSI_RBUF_SIZE
);
1920 return ata_scsi_rbuf
;
1924 * ata_scsi_rbuf_put - Unmap response buffer.
1925 * @cmd: SCSI command containing buffer to be unmapped.
1926 * @copy_out: copy out result
1927 * @flags: @flags passed to ata_scsi_rbuf_get()
1929 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1930 * @copy_back is true.
1933 * Unlocks ata_scsi_rbuf_lock.
1935 static inline void ata_scsi_rbuf_put(struct scsi_cmnd
*cmd
, bool copy_out
,
1936 unsigned long *flags
)
1939 sg_copy_from_buffer(scsi_sglist(cmd
), scsi_sg_count(cmd
),
1940 ata_scsi_rbuf
, ATA_SCSI_RBUF_SIZE
);
1941 spin_unlock_irqrestore(&ata_scsi_rbuf_lock
, *flags
);
1945 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1946 * @args: device IDENTIFY data / SCSI command of interest.
1947 * @actor: Callback hook for desired SCSI command simulator
1949 * Takes care of the hard work of simulating a SCSI command...
1950 * Mapping the response buffer, calling the command's handler,
1951 * and handling the handler's return value. This return value
1952 * indicates whether the handler wishes the SCSI command to be
1953 * completed successfully (0), or not (in which case cmd->result
1954 * and sense buffer are assumed to be set).
1957 * spin_lock_irqsave(host lock)
1959 static void ata_scsi_rbuf_fill(struct ata_scsi_args
*args
,
1960 unsigned int (*actor
)(struct ata_scsi_args
*args
, u8
*rbuf
))
1964 struct scsi_cmnd
*cmd
= args
->cmd
;
1965 unsigned long flags
;
1967 rbuf
= ata_scsi_rbuf_get(cmd
, false, &flags
);
1968 rc
= actor(args
, rbuf
);
1969 ata_scsi_rbuf_put(cmd
, rc
== 0, &flags
);
1972 cmd
->result
= SAM_STAT_GOOD
;
1977 * ata_scsiop_inq_std - Simulate INQUIRY command
1978 * @args: device IDENTIFY data / SCSI command of interest.
1979 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1981 * Returns standard device identification data associated
1982 * with non-VPD INQUIRY command output.
1985 * spin_lock_irqsave(host lock)
1987 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args
*args
, u8
*rbuf
)
1989 const u8 versions
[] = {
1991 0x60, /* SAM-3 (no version claimed) */
1994 0x20, /* SBC-2 (no version claimed) */
1997 0x60 /* SPC-3 (no version claimed) */
1999 const u8 versions_zbc
[] = {
2001 0xA0, /* SAM-5 (no version claimed) */
2004 0xC0, /* SBC-3 (no version claimed) */
2007 0x60, /* SPC-4 (no version claimed) */
2010 0x20, /* ZBC (no version claimed) */
2016 0x5, /* claim SPC-3 version compatibility */
2023 /* set scsi removable (RMB) bit per ata bit */
2024 if (ata_id_removable(args
->id
))
2027 if (args
->dev
->class == ATA_DEV_ZAC
) {
2029 hdr
[2] = 0x6; /* ZBC is defined in SPC-4 */
2032 memcpy(rbuf
, hdr
, sizeof(hdr
));
2033 memcpy(&rbuf
[8], "ATA ", 8);
2034 ata_id_string(args
->id
, &rbuf
[16], ATA_ID_PROD
, 16);
2036 /* From SAT, use last 2 words from fw rev unless they are spaces */
2037 ata_id_string(args
->id
, &rbuf
[32], ATA_ID_FW_REV
+ 2, 4);
2038 if (strncmp(&rbuf
[32], " ", 4) == 0)
2039 ata_id_string(args
->id
, &rbuf
[32], ATA_ID_FW_REV
, 4);
2041 if (rbuf
[32] == 0 || rbuf
[32] == ' ')
2042 memcpy(&rbuf
[32], "n/a ", 4);
2044 if (args
->dev
->class == ATA_DEV_ZAC
)
2045 memcpy(rbuf
+ 58, versions_zbc
, sizeof(versions_zbc
));
2047 memcpy(rbuf
+ 58, versions
, sizeof(versions
));
2053 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
2054 * @args: device IDENTIFY data / SCSI command of interest.
2055 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2057 * Returns list of inquiry VPD pages available.
2060 * spin_lock_irqsave(host lock)
2062 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args
*args
, u8
*rbuf
)
2064 const u8 pages
[] = {
2065 0x00, /* page 0x00, this page */
2066 0x80, /* page 0x80, unit serial no page */
2067 0x83, /* page 0x83, device ident page */
2068 0x89, /* page 0x89, ata info page */
2069 0xb0, /* page 0xb0, block limits page */
2070 0xb1, /* page 0xb1, block device characteristics page */
2071 0xb2, /* page 0xb2, thin provisioning page */
2074 rbuf
[3] = sizeof(pages
); /* number of supported VPD pages */
2075 memcpy(rbuf
+ 4, pages
, sizeof(pages
));
2080 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
2081 * @args: device IDENTIFY data / SCSI command of interest.
2082 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2084 * Returns ATA device serial number.
2087 * spin_lock_irqsave(host lock)
2089 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args
*args
, u8
*rbuf
)
2093 0x80, /* this page code */
2095 ATA_ID_SERNO_LEN
, /* page len */
2098 memcpy(rbuf
, hdr
, sizeof(hdr
));
2099 ata_id_string(args
->id
, (unsigned char *) &rbuf
[4],
2100 ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
2105 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
2106 * @args: device IDENTIFY data / SCSI command of interest.
2107 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2109 * Yields two logical unit device identification designators:
2110 * - vendor specific ASCII containing the ATA serial number
2111 * - SAT defined "t10 vendor id based" containing ASCII vendor
2112 * name ("ATA "), model and serial numbers.
2115 * spin_lock_irqsave(host lock)
2117 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args
*args
, u8
*rbuf
)
2119 const int sat_model_serial_desc_len
= 68;
2122 rbuf
[1] = 0x83; /* this page code */
2125 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2127 rbuf
[num
+ 3] = ATA_ID_SERNO_LEN
;
2129 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
,
2130 ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
2131 num
+= ATA_ID_SERNO_LEN
;
2133 /* SAT defined lu model and serial numbers descriptor */
2134 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2137 rbuf
[num
+ 3] = sat_model_serial_desc_len
;
2139 memcpy(rbuf
+ num
, "ATA ", 8);
2141 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
, ATA_ID_PROD
,
2143 num
+= ATA_ID_PROD_LEN
;
2144 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
, ATA_ID_SERNO
,
2146 num
+= ATA_ID_SERNO_LEN
;
2148 if (ata_id_has_wwn(args
->id
)) {
2149 /* SAT defined lu world wide name */
2150 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
2153 rbuf
[num
+ 3] = ATA_ID_WWN_LEN
;
2155 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
,
2156 ATA_ID_WWN
, ATA_ID_WWN_LEN
);
2157 num
+= ATA_ID_WWN_LEN
;
2159 rbuf
[3] = num
- 4; /* page len (assume less than 256 bytes) */
2164 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2165 * @args: device IDENTIFY data / SCSI command of interest.
2166 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2168 * Yields SAT-specified ATA VPD page.
2171 * spin_lock_irqsave(host lock)
2173 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args
*args
, u8
*rbuf
)
2175 struct ata_taskfile tf
;
2177 memset(&tf
, 0, sizeof(tf
));
2179 rbuf
[1] = 0x89; /* our page code */
2180 rbuf
[2] = (0x238 >> 8); /* page size fixed at 238h */
2181 rbuf
[3] = (0x238 & 0xff);
2183 memcpy(&rbuf
[8], "linux ", 8);
2184 memcpy(&rbuf
[16], "libata ", 16);
2185 memcpy(&rbuf
[32], DRV_VERSION
, 4);
2187 /* we don't store the ATA device signature, so we fake it */
2189 tf
.command
= ATA_DRDY
; /* really, this is Status reg */
2193 ata_tf_to_fis(&tf
, 0, 1, &rbuf
[36]); /* TODO: PMP? */
2194 rbuf
[36] = 0x34; /* force D2H Reg FIS (34h) */
2196 rbuf
[56] = ATA_CMD_ID_ATA
;
2198 memcpy(&rbuf
[60], &args
->id
[0], 512);
2202 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args
*args
, u8
*rbuf
)
2207 rbuf
[3] = 0x3c; /* required VPD size with unmap support */
2210 * Optimal transfer length granularity.
2212 * This is always one physical block, but for disks with a smaller
2213 * logical than physical sector size we need to figure out what the
2216 min_io_sectors
= 1 << ata_id_log2_per_physical_sector(args
->id
);
2217 put_unaligned_be16(min_io_sectors
, &rbuf
[6]);
2220 * Optimal unmap granularity.
2222 * The ATA spec doesn't even know about a granularity or alignment
2223 * for the TRIM command. We can leave away most of the unmap related
2224 * VPD page entries, but we have specifify a granularity to signal
2225 * that we support some form of unmap - in thise case via WRITE SAME
2226 * with the unmap bit set.
2228 if (ata_id_has_trim(args
->id
)) {
2229 put_unaligned_be64(65535 * 512 / 8, &rbuf
[36]);
2230 put_unaligned_be32(1, &rbuf
[28]);
2236 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args
*args
, u8
*rbuf
)
2238 int form_factor
= ata_id_form_factor(args
->id
);
2239 int media_rotation_rate
= ata_id_rotation_rate(args
->id
);
2243 rbuf
[4] = media_rotation_rate
>> 8;
2244 rbuf
[5] = media_rotation_rate
;
2245 rbuf
[7] = form_factor
;
2250 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args
*args
, u8
*rbuf
)
2252 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2255 rbuf
[5] = 1 << 6; /* TPWS */
2261 * ata_scsiop_noop - Command handler that simply returns success.
2262 * @args: device IDENTIFY data / SCSI command of interest.
2263 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2265 * No operation. Simply returns success to caller, to indicate
2266 * that the caller should successfully complete this SCSI command.
2269 * spin_lock_irqsave(host lock)
2271 static unsigned int ata_scsiop_noop(struct ata_scsi_args
*args
, u8
*rbuf
)
2278 * modecpy - Prepare response for MODE SENSE
2279 * @dest: output buffer
2280 * @src: data being copied
2281 * @n: length of mode page
2282 * @changeable: whether changeable parameters are requested
2284 * Generate a generic MODE SENSE page for either current or changeable
2290 static void modecpy(u8
*dest
, const u8
*src
, int n
, bool changeable
)
2293 memcpy(dest
, src
, 2);
2294 memset(dest
+ 2, 0, n
- 2);
2296 memcpy(dest
, src
, n
);
2301 * ata_msense_caching - Simulate MODE SENSE caching info page
2302 * @id: device IDENTIFY data
2303 * @buf: output buffer
2304 * @changeable: whether changeable parameters are requested
2306 * Generate a caching info page, which conditionally indicates
2307 * write caching to the SCSI layer, depending on device
2313 static unsigned int ata_msense_caching(u16
*id
, u8
*buf
, bool changeable
)
2315 modecpy(buf
, def_cache_mpage
, sizeof(def_cache_mpage
), changeable
);
2316 if (changeable
|| ata_id_wcache_enabled(id
))
2317 buf
[2] |= (1 << 2); /* write cache enable */
2318 if (!changeable
&& !ata_id_rahead_enabled(id
))
2319 buf
[12] |= (1 << 5); /* disable read ahead */
2320 return sizeof(def_cache_mpage
);
2324 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
2325 * @buf: output buffer
2326 * @changeable: whether changeable parameters are requested
2328 * Generate a generic MODE SENSE control mode page.
2333 static unsigned int ata_msense_ctl_mode(u8
*buf
, bool changeable
)
2335 modecpy(buf
, def_control_mpage
, sizeof(def_control_mpage
), changeable
);
2336 return sizeof(def_control_mpage
);
2340 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2341 * @buf: output buffer
2342 * @changeable: whether changeable parameters are requested
2344 * Generate a generic MODE SENSE r/w error recovery page.
2349 static unsigned int ata_msense_rw_recovery(u8
*buf
, bool changeable
)
2351 modecpy(buf
, def_rw_recovery_mpage
, sizeof(def_rw_recovery_mpage
),
2353 return sizeof(def_rw_recovery_mpage
);
2357 * We can turn this into a real blacklist if it's needed, for now just
2358 * blacklist any Maxtor BANC1G10 revision firmware
2360 static int ata_dev_supports_fua(u16
*id
)
2362 unsigned char model
[ATA_ID_PROD_LEN
+ 1], fw
[ATA_ID_FW_REV_LEN
+ 1];
2366 if (!ata_id_has_fua(id
))
2369 ata_id_c_string(id
, model
, ATA_ID_PROD
, sizeof(model
));
2370 ata_id_c_string(id
, fw
, ATA_ID_FW_REV
, sizeof(fw
));
2372 if (strcmp(model
, "Maxtor"))
2374 if (strcmp(fw
, "BANC1G10"))
2377 return 0; /* blacklisted */
2381 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2382 * @args: device IDENTIFY data / SCSI command of interest.
2383 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2385 * Simulate MODE SENSE commands. Assume this is invoked for direct
2386 * access devices (e.g. disks) only. There should be no block
2387 * descriptor for other device types.
2390 * spin_lock_irqsave(host lock)
2392 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args
*args
, u8
*rbuf
)
2394 struct ata_device
*dev
= args
->dev
;
2395 u8
*scsicmd
= args
->cmd
->cmnd
, *p
= rbuf
;
2396 const u8 sat_blk_desc
[] = {
2397 0, 0, 0, 0, /* number of blocks: sat unspecified */
2399 0, 0x2, 0x0 /* block length: 512 bytes */
2402 unsigned int ebd
, page_control
, six_byte
;
2407 six_byte
= (scsicmd
[0] == MODE_SENSE
);
2408 ebd
= !(scsicmd
[1] & 0x8); /* dbd bit inverted == edb */
2410 * LLBA bit in msense(10) ignored (compliant)
2413 page_control
= scsicmd
[2] >> 6;
2414 switch (page_control
) {
2415 case 0: /* current */
2416 case 1: /* changeable */
2417 case 2: /* defaults */
2418 break; /* supported */
2420 goto saving_not_supp
;
2426 p
+= 4 + (ebd
? 8 : 0);
2428 p
+= 8 + (ebd
? 8 : 0);
2430 pg
= scsicmd
[2] & 0x3f;
2433 * No mode subpages supported (yet) but asking for _all_
2434 * subpages may be valid
2436 if (spg
&& (spg
!= ALL_SUB_MPAGES
))
2440 case RW_RECOVERY_MPAGE
:
2441 p
+= ata_msense_rw_recovery(p
, page_control
== 1);
2445 p
+= ata_msense_caching(args
->id
, p
, page_control
== 1);
2449 p
+= ata_msense_ctl_mode(p
, page_control
== 1);
2453 p
+= ata_msense_rw_recovery(p
, page_control
== 1);
2454 p
+= ata_msense_caching(args
->id
, p
, page_control
== 1);
2455 p
+= ata_msense_ctl_mode(p
, page_control
== 1);
2458 default: /* invalid page code */
2463 if (ata_dev_supports_fua(args
->id
) && (dev
->flags
& ATA_DFLAG_LBA48
) &&
2464 (!(dev
->flags
& ATA_DFLAG_PIO
) || dev
->multi_count
))
2468 rbuf
[0] = p
- rbuf
- 1;
2471 rbuf
[3] = sizeof(sat_blk_desc
);
2472 memcpy(rbuf
+ 4, sat_blk_desc
, sizeof(sat_blk_desc
));
2475 unsigned int output_len
= p
- rbuf
- 2;
2477 rbuf
[0] = output_len
>> 8;
2478 rbuf
[1] = output_len
;
2481 rbuf
[7] = sizeof(sat_blk_desc
);
2482 memcpy(rbuf
+ 8, sat_blk_desc
, sizeof(sat_blk_desc
));
2488 ata_scsi_set_sense(args
->cmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
2489 /* "Invalid field in cbd" */
2493 ata_scsi_set_sense(args
->cmd
, ILLEGAL_REQUEST
, 0x39, 0x0);
2494 /* "Saving parameters not supported" */
2499 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2500 * @args: device IDENTIFY data / SCSI command of interest.
2501 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2503 * Simulate READ CAPACITY commands.
2508 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args
*args
, u8
*rbuf
)
2510 struct ata_device
*dev
= args
->dev
;
2511 u64 last_lba
= dev
->n_sectors
- 1; /* LBA of the last block */
2512 u32 sector_size
; /* physical sector size in bytes */
2516 sector_size
= ata_id_logical_sector_size(dev
->id
);
2517 log2_per_phys
= ata_id_log2_per_physical_sector(dev
->id
);
2518 lowest_aligned
= ata_id_logical_sector_offset(dev
->id
, log2_per_phys
);
2522 if (args
->cmd
->cmnd
[0] == READ_CAPACITY
) {
2523 if (last_lba
>= 0xffffffffULL
)
2524 last_lba
= 0xffffffff;
2526 /* sector count, 32-bit */
2527 rbuf
[0] = last_lba
>> (8 * 3);
2528 rbuf
[1] = last_lba
>> (8 * 2);
2529 rbuf
[2] = last_lba
>> (8 * 1);
2533 rbuf
[4] = sector_size
>> (8 * 3);
2534 rbuf
[5] = sector_size
>> (8 * 2);
2535 rbuf
[6] = sector_size
>> (8 * 1);
2536 rbuf
[7] = sector_size
;
2538 /* sector count, 64-bit */
2539 rbuf
[0] = last_lba
>> (8 * 7);
2540 rbuf
[1] = last_lba
>> (8 * 6);
2541 rbuf
[2] = last_lba
>> (8 * 5);
2542 rbuf
[3] = last_lba
>> (8 * 4);
2543 rbuf
[4] = last_lba
>> (8 * 3);
2544 rbuf
[5] = last_lba
>> (8 * 2);
2545 rbuf
[6] = last_lba
>> (8 * 1);
2549 rbuf
[ 8] = sector_size
>> (8 * 3);
2550 rbuf
[ 9] = sector_size
>> (8 * 2);
2551 rbuf
[10] = sector_size
>> (8 * 1);
2552 rbuf
[11] = sector_size
;
2555 rbuf
[13] = log2_per_phys
;
2556 rbuf
[14] = (lowest_aligned
>> 8) & 0x3f;
2557 rbuf
[15] = lowest_aligned
;
2559 if (ata_id_has_trim(args
->id
) &&
2560 !(dev
->horkage
& ATA_HORKAGE_NOTRIM
)) {
2561 rbuf
[14] |= 0x80; /* LBPME */
2563 if (ata_id_has_zero_after_trim(args
->id
) &&
2564 dev
->horkage
& ATA_HORKAGE_ZERO_AFTER_TRIM
) {
2565 ata_dev_info(dev
, "Enabling discard_zeroes_data\n");
2566 rbuf
[14] |= 0x40; /* LBPRZ */
2574 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2575 * @args: device IDENTIFY data / SCSI command of interest.
2576 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2578 * Simulate REPORT LUNS command.
2581 * spin_lock_irqsave(host lock)
2583 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args
*args
, u8
*rbuf
)
2586 rbuf
[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2591 static void atapi_sense_complete(struct ata_queued_cmd
*qc
)
2593 if (qc
->err_mask
&& ((qc
->err_mask
& AC_ERR_DEV
) == 0)) {
2594 /* FIXME: not quite right; we don't want the
2595 * translation of taskfile registers into
2596 * a sense descriptors, since that's only
2597 * correct for ATA, not ATAPI
2599 ata_gen_passthru_sense(qc
);
2602 qc
->scsidone(qc
->scsicmd
);
2606 /* is it pointless to prefer PIO for "safety reasons"? */
2607 static inline int ata_pio_use_silly(struct ata_port
*ap
)
2609 return (ap
->flags
& ATA_FLAG_PIO_DMA
);
2612 static void atapi_request_sense(struct ata_queued_cmd
*qc
)
2614 struct ata_port
*ap
= qc
->ap
;
2615 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2617 DPRINTK("ATAPI request sense\n");
2619 memset(cmd
->sense_buffer
, 0, SCSI_SENSE_BUFFERSIZE
);
2621 #ifdef CONFIG_ATA_SFF
2622 if (ap
->ops
->sff_tf_read
)
2623 ap
->ops
->sff_tf_read(ap
, &qc
->tf
);
2626 /* fill these in, for the case where they are -not- overwritten */
2627 cmd
->sense_buffer
[0] = 0x70;
2628 cmd
->sense_buffer
[2] = qc
->tf
.feature
>> 4;
2632 /* setup sg table and init transfer direction */
2633 sg_init_one(&qc
->sgent
, cmd
->sense_buffer
, SCSI_SENSE_BUFFERSIZE
);
2634 ata_sg_init(qc
, &qc
->sgent
, 1);
2635 qc
->dma_dir
= DMA_FROM_DEVICE
;
2637 memset(&qc
->cdb
, 0, qc
->dev
->cdb_len
);
2638 qc
->cdb
[0] = REQUEST_SENSE
;
2639 qc
->cdb
[4] = SCSI_SENSE_BUFFERSIZE
;
2641 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2642 qc
->tf
.command
= ATA_CMD_PACKET
;
2644 if (ata_pio_use_silly(ap
)) {
2645 qc
->tf
.protocol
= ATAPI_PROT_DMA
;
2646 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
2648 qc
->tf
.protocol
= ATAPI_PROT_PIO
;
2649 qc
->tf
.lbam
= SCSI_SENSE_BUFFERSIZE
;
2652 qc
->nbytes
= SCSI_SENSE_BUFFERSIZE
;
2654 qc
->complete_fn
= atapi_sense_complete
;
2661 static void atapi_qc_complete(struct ata_queued_cmd
*qc
)
2663 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2664 unsigned int err_mask
= qc
->err_mask
;
2666 VPRINTK("ENTER, err_mask 0x%X\n", err_mask
);
2668 /* handle completion from new EH */
2669 if (unlikely(qc
->ap
->ops
->error_handler
&&
2670 (err_mask
|| qc
->flags
& ATA_QCFLAG_SENSE_VALID
))) {
2672 if (!(qc
->flags
& ATA_QCFLAG_SENSE_VALID
)) {
2673 /* FIXME: not quite right; we don't want the
2674 * translation of taskfile registers into a
2675 * sense descriptors, since that's only
2676 * correct for ATA, not ATAPI
2678 ata_gen_passthru_sense(qc
);
2681 /* SCSI EH automatically locks door if sdev->locked is
2682 * set. Sometimes door lock request continues to
2683 * fail, for example, when no media is present. This
2684 * creates a loop - SCSI EH issues door lock which
2685 * fails and gets invoked again to acquire sense data
2686 * for the failed command.
2688 * If door lock fails, always clear sdev->locked to
2689 * avoid this infinite loop.
2691 * This may happen before SCSI scan is complete. Make
2692 * sure qc->dev->sdev isn't NULL before dereferencing.
2694 if (qc
->cdb
[0] == ALLOW_MEDIUM_REMOVAL
&& qc
->dev
->sdev
)
2695 qc
->dev
->sdev
->locked
= 0;
2697 qc
->scsicmd
->result
= SAM_STAT_CHECK_CONDITION
;
2703 /* successful completion or old EH failure path */
2704 if (unlikely(err_mask
& AC_ERR_DEV
)) {
2705 cmd
->result
= SAM_STAT_CHECK_CONDITION
;
2706 atapi_request_sense(qc
);
2708 } else if (unlikely(err_mask
)) {
2709 /* FIXME: not quite right; we don't want the
2710 * translation of taskfile registers into
2711 * a sense descriptors, since that's only
2712 * correct for ATA, not ATAPI
2714 ata_gen_passthru_sense(qc
);
2716 u8
*scsicmd
= cmd
->cmnd
;
2718 if ((scsicmd
[0] == INQUIRY
) && ((scsicmd
[1] & 0x03) == 0)) {
2719 unsigned long flags
;
2722 buf
= ata_scsi_rbuf_get(cmd
, true, &flags
);
2724 /* ATAPI devices typically report zero for their SCSI version,
2725 * and sometimes deviate from the spec WRT response data
2726 * format. If SCSI version is reported as zero like normal,
2727 * then we make the following fixups: 1) Fake MMC-5 version,
2728 * to indicate to the Linux scsi midlayer this is a modern
2729 * device. 2) Ensure response data format / ATAPI information
2730 * are always correct.
2737 ata_scsi_rbuf_put(cmd
, true, &flags
);
2740 cmd
->result
= SAM_STAT_GOOD
;
2747 * atapi_xlat - Initialize PACKET taskfile
2748 * @qc: command structure to be initialized
2751 * spin_lock_irqsave(host lock)
2754 * Zero on success, non-zero on failure.
2756 static unsigned int atapi_xlat(struct ata_queued_cmd
*qc
)
2758 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
2759 struct ata_device
*dev
= qc
->dev
;
2760 int nodata
= (scmd
->sc_data_direction
== DMA_NONE
);
2761 int using_pio
= !nodata
&& (dev
->flags
& ATA_DFLAG_PIO
);
2762 unsigned int nbytes
;
2764 memset(qc
->cdb
, 0, dev
->cdb_len
);
2765 memcpy(qc
->cdb
, scmd
->cmnd
, scmd
->cmd_len
);
2767 qc
->complete_fn
= atapi_qc_complete
;
2769 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2770 if (scmd
->sc_data_direction
== DMA_TO_DEVICE
) {
2771 qc
->tf
.flags
|= ATA_TFLAG_WRITE
;
2772 DPRINTK("direction: write\n");
2775 qc
->tf
.command
= ATA_CMD_PACKET
;
2776 ata_qc_set_pc_nbytes(qc
);
2778 /* check whether ATAPI DMA is safe */
2779 if (!nodata
&& !using_pio
&& atapi_check_dma(qc
))
2782 /* Some controller variants snoop this value for Packet
2783 * transfers to do state machine and FIFO management. Thus we
2784 * want to set it properly, and for DMA where it is
2785 * effectively meaningless.
2787 nbytes
= min(ata_qc_raw_nbytes(qc
), (unsigned int)63 * 1024);
2789 /* Most ATAPI devices which honor transfer chunk size don't
2790 * behave according to the spec when odd chunk size which
2791 * matches the transfer length is specified. If the number of
2792 * bytes to transfer is 2n+1. According to the spec, what
2793 * should happen is to indicate that 2n+1 is going to be
2794 * transferred and transfer 2n+2 bytes where the last byte is
2797 * In practice, this doesn't happen. ATAPI devices first
2798 * indicate and transfer 2n bytes and then indicate and
2799 * transfer 2 bytes where the last byte is padding.
2801 * This inconsistency confuses several controllers which
2802 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2803 * These controllers use actual number of transferred bytes to
2804 * update DMA poitner and transfer of 4n+2 bytes make those
2805 * controller push DMA pointer by 4n+4 bytes because SATA data
2806 * FISes are aligned to 4 bytes. This causes data corruption
2807 * and buffer overrun.
2809 * Always setting nbytes to even number solves this problem
2810 * because then ATAPI devices don't have to split data at 2n
2816 qc
->tf
.lbam
= (nbytes
& 0xFF);
2817 qc
->tf
.lbah
= (nbytes
>> 8);
2820 qc
->tf
.protocol
= ATAPI_PROT_NODATA
;
2822 qc
->tf
.protocol
= ATAPI_PROT_PIO
;
2825 qc
->tf
.protocol
= ATAPI_PROT_DMA
;
2826 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
2828 if ((dev
->flags
& ATA_DFLAG_DMADIR
) &&
2829 (scmd
->sc_data_direction
!= DMA_TO_DEVICE
))
2830 /* some SATA bridges need us to indicate data xfer direction */
2831 qc
->tf
.feature
|= ATAPI_DMADIR
;
2835 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2836 as ATAPI tape drives don't get this right otherwise */
2840 static struct ata_device
*ata_find_dev(struct ata_port
*ap
, int devno
)
2842 if (!sata_pmp_attached(ap
)) {
2843 if (likely(devno
< ata_link_max_devices(&ap
->link
)))
2844 return &ap
->link
.device
[devno
];
2846 if (likely(devno
< ap
->nr_pmp_links
))
2847 return &ap
->pmp_link
[devno
].device
[0];
2853 static struct ata_device
*__ata_scsi_find_dev(struct ata_port
*ap
,
2854 const struct scsi_device
*scsidev
)
2858 /* skip commands not addressed to targets we simulate */
2859 if (!sata_pmp_attached(ap
)) {
2860 if (unlikely(scsidev
->channel
|| scsidev
->lun
))
2862 devno
= scsidev
->id
;
2864 if (unlikely(scsidev
->id
|| scsidev
->lun
))
2866 devno
= scsidev
->channel
;
2869 return ata_find_dev(ap
, devno
);
2873 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2874 * @ap: ATA port to which the device is attached
2875 * @scsidev: SCSI device from which we derive the ATA device
2877 * Given various information provided in struct scsi_cmnd,
2878 * map that onto an ATA bus, and using that mapping
2879 * determine which ata_device is associated with the
2880 * SCSI command to be sent.
2883 * spin_lock_irqsave(host lock)
2886 * Associated ATA device, or %NULL if not found.
2888 static struct ata_device
*
2889 ata_scsi_find_dev(struct ata_port
*ap
, const struct scsi_device
*scsidev
)
2891 struct ata_device
*dev
= __ata_scsi_find_dev(ap
, scsidev
);
2893 if (unlikely(!dev
|| !ata_dev_enabled(dev
)))
2900 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2901 * @byte1: Byte 1 from pass-thru CDB.
2904 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2907 ata_scsi_map_proto(u8 byte1
)
2909 switch((byte1
& 0x1e) >> 1) {
2910 case 3: /* Non-data */
2911 return ATA_PROT_NODATA
;
2914 case 10: /* UDMA Data-in */
2915 case 11: /* UDMA Data-Out */
2916 return ATA_PROT_DMA
;
2918 case 4: /* PIO Data-in */
2919 case 5: /* PIO Data-out */
2920 return ATA_PROT_PIO
;
2922 case 0: /* Hard Reset */
2924 case 8: /* Device Diagnostic */
2925 case 9: /* Device Reset */
2926 case 7: /* DMA Queued */
2927 case 12: /* FPDMA */
2928 case 15: /* Return Response Info */
2929 default: /* Reserved */
2933 return ATA_PROT_UNKNOWN
;
2937 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2938 * @qc: command structure to be initialized
2940 * Handles either 12 or 16-byte versions of the CDB.
2943 * Zero on success, non-zero on failure.
2945 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd
*qc
)
2947 struct ata_taskfile
*tf
= &(qc
->tf
);
2948 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
2949 struct ata_device
*dev
= qc
->dev
;
2950 const u8
*cdb
= scmd
->cmnd
;
2952 if ((tf
->protocol
= ata_scsi_map_proto(cdb
[1])) == ATA_PROT_UNKNOWN
)
2956 * 12 and 16 byte CDBs use different offsets to
2957 * provide the various register values.
2959 if (cdb
[0] == ATA_16
) {
2961 * 16-byte CDB - may contain extended commands.
2963 * If that is the case, copy the upper byte register values.
2965 if (cdb
[1] & 0x01) {
2966 tf
->hob_feature
= cdb
[3];
2967 tf
->hob_nsect
= cdb
[5];
2968 tf
->hob_lbal
= cdb
[7];
2969 tf
->hob_lbam
= cdb
[9];
2970 tf
->hob_lbah
= cdb
[11];
2971 tf
->flags
|= ATA_TFLAG_LBA48
;
2973 tf
->flags
&= ~ATA_TFLAG_LBA48
;
2976 * Always copy low byte, device and command registers.
2978 tf
->feature
= cdb
[4];
2983 tf
->device
= cdb
[13];
2984 tf
->command
= cdb
[14];
2987 * 12-byte CDB - incapable of extended commands.
2989 tf
->flags
&= ~ATA_TFLAG_LBA48
;
2991 tf
->feature
= cdb
[3];
2996 tf
->device
= cdb
[8];
2997 tf
->command
= cdb
[9];
3000 /* enforce correct master/slave bit */
3001 tf
->device
= dev
->devno
?
3002 tf
->device
| ATA_DEV1
: tf
->device
& ~ATA_DEV1
;
3004 switch (tf
->command
) {
3005 /* READ/WRITE LONG use a non-standard sect_size */
3006 case ATA_CMD_READ_LONG
:
3007 case ATA_CMD_READ_LONG_ONCE
:
3008 case ATA_CMD_WRITE_LONG
:
3009 case ATA_CMD_WRITE_LONG_ONCE
:
3010 if (tf
->protocol
!= ATA_PROT_PIO
|| tf
->nsect
!= 1)
3012 qc
->sect_size
= scsi_bufflen(scmd
);
3015 /* commands using reported Logical Block size (e.g. 512 or 4K) */
3016 case ATA_CMD_CFA_WRITE_NE
:
3017 case ATA_CMD_CFA_TRANS_SECT
:
3018 case ATA_CMD_CFA_WRITE_MULT_NE
:
3019 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
3021 case ATA_CMD_READ_EXT
:
3022 case ATA_CMD_READ_QUEUED
:
3023 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
3024 case ATA_CMD_FPDMA_READ
:
3025 case ATA_CMD_READ_MULTI
:
3026 case ATA_CMD_READ_MULTI_EXT
:
3027 case ATA_CMD_PIO_READ
:
3028 case ATA_CMD_PIO_READ_EXT
:
3029 case ATA_CMD_READ_STREAM_DMA_EXT
:
3030 case ATA_CMD_READ_STREAM_EXT
:
3031 case ATA_CMD_VERIFY
:
3032 case ATA_CMD_VERIFY_EXT
:
3034 case ATA_CMD_WRITE_EXT
:
3035 case ATA_CMD_WRITE_FUA_EXT
:
3036 case ATA_CMD_WRITE_QUEUED
:
3037 case ATA_CMD_WRITE_QUEUED_FUA_EXT
:
3038 case ATA_CMD_FPDMA_WRITE
:
3039 case ATA_CMD_WRITE_MULTI
:
3040 case ATA_CMD_WRITE_MULTI_EXT
:
3041 case ATA_CMD_WRITE_MULTI_FUA_EXT
:
3042 case ATA_CMD_PIO_WRITE
:
3043 case ATA_CMD_PIO_WRITE_EXT
:
3044 case ATA_CMD_WRITE_STREAM_DMA_EXT
:
3045 case ATA_CMD_WRITE_STREAM_EXT
:
3046 qc
->sect_size
= scmd
->device
->sector_size
;
3049 /* Everything else uses 512 byte "sectors" */
3051 qc
->sect_size
= ATA_SECT_SIZE
;
3055 * Set flags so that all registers will be written, pass on
3056 * write indication (used for PIO/DMA setup), result TF is
3057 * copied back and we don't whine too much about its failure.
3059 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
3060 if (scmd
->sc_data_direction
== DMA_TO_DEVICE
)
3061 tf
->flags
|= ATA_TFLAG_WRITE
;
3063 qc
->flags
|= ATA_QCFLAG_RESULT_TF
| ATA_QCFLAG_QUIET
;
3066 * Set transfer length.
3068 * TODO: find out if we need to do more here to
3069 * cover scatter/gather case.
3071 ata_qc_set_pc_nbytes(qc
);
3073 /* We may not issue DMA commands if no DMA mode is set */
3074 if (tf
->protocol
== ATA_PROT_DMA
&& dev
->dma_mode
== 0)
3077 /* sanity check for pio multi commands */
3078 if ((cdb
[1] & 0xe0) && !is_multi_taskfile(tf
))
3081 if (is_multi_taskfile(tf
)) {
3082 unsigned int multi_count
= 1 << (cdb
[1] >> 5);
3084 /* compare the passed through multi_count
3085 * with the cached multi_count of libata
3087 if (multi_count
!= dev
->multi_count
)
3088 ata_dev_warn(dev
, "invalid multi_count %u ignored\n",
3093 * Filter SET_FEATURES - XFER MODE command -- otherwise,
3094 * SET_FEATURES - XFER MODE must be preceded/succeeded
3095 * by an update to hardware-specific registers for each
3096 * controller (i.e. the reason for ->set_piomode(),
3097 * ->set_dmamode(), and ->post_set_mode() hooks).
3099 if (tf
->command
== ATA_CMD_SET_FEATURES
&&
3100 tf
->feature
== SETFEATURES_XFER
)
3104 * Filter TPM commands by default. These provide an
3105 * essentially uncontrolled encrypted "back door" between
3106 * applications and the disk. Set libata.allow_tpm=1 if you
3107 * have a real reason for wanting to use them. This ensures
3108 * that installed software cannot easily mess stuff up without
3109 * user intent. DVR type users will probably ship with this enabled
3110 * for movie content management.
3112 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
3113 * for this and should do in future but that it is not sufficient as
3114 * DCS is an optional feature set. Thus we also do the software filter
3115 * so that we comply with the TC consortium stated goal that the user
3116 * can turn off TC features of their system.
3118 if (tf
->command
>= 0x5C && tf
->command
<= 0x5F && !libata_allow_tpm
)
3124 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x00);
3125 /* "Invalid field in cdb" */
3129 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd
*qc
)
3131 struct ata_taskfile
*tf
= &qc
->tf
;
3132 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
3133 struct ata_device
*dev
= qc
->dev
;
3134 const u8
*cdb
= scmd
->cmnd
;
3140 /* we may not issue DMA commands if no DMA mode is set */
3141 if (unlikely(!dev
->dma_mode
))
3144 if (unlikely(scmd
->cmd_len
< 16))
3146 scsi_16_lba_len(cdb
, &block
, &n_block
);
3148 /* for now we only support WRITE SAME with the unmap bit set */
3149 if (unlikely(!(cdb
[1] & 0x8)))
3153 * WRITE SAME always has a sector sized buffer as payload, this
3154 * should never be a multiple entry S/G list.
3156 if (!scsi_sg_count(scmd
))
3159 buf
= page_address(sg_page(scsi_sglist(scmd
)));
3160 size
= ata_set_lba_range_entries(buf
, 512, block
, n_block
);
3162 if (ata_ncq_enabled(dev
) && ata_fpdma_dsm_supported(dev
)) {
3163 /* Newer devices support queued TRIM commands */
3164 tf
->protocol
= ATA_PROT_NCQ
;
3165 tf
->command
= ATA_CMD_FPDMA_SEND
;
3166 tf
->hob_nsect
= ATA_SUBCMD_FPDMA_SEND_DSM
& 0x1f;
3167 tf
->nsect
= qc
->tag
<< 3;
3168 tf
->hob_feature
= (size
/ 512) >> 8;
3169 tf
->feature
= size
/ 512;
3173 tf
->protocol
= ATA_PROT_DMA
;
3174 tf
->hob_feature
= 0;
3175 tf
->feature
= ATA_DSM_TRIM
;
3176 tf
->hob_nsect
= (size
/ 512) >> 8;
3177 tf
->nsect
= size
/ 512;
3178 tf
->command
= ATA_CMD_DSM
;
3181 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_LBA48
|
3184 ata_qc_set_pc_nbytes(qc
);
3189 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x00);
3190 /* "Invalid field in cdb" */
3195 * ata_mselect_caching - Simulate MODE SELECT for caching info page
3196 * @qc: Storage for translated ATA taskfile
3197 * @buf: input buffer
3198 * @len: number of valid bytes in the input buffer
3200 * Prepare a taskfile to modify caching information for the device.
3205 static int ata_mselect_caching(struct ata_queued_cmd
*qc
,
3206 const u8
*buf
, int len
)
3208 struct ata_taskfile
*tf
= &qc
->tf
;
3209 struct ata_device
*dev
= qc
->dev
;
3210 char mpage
[CACHE_MPAGE_LEN
];
3214 * The first two bytes of def_cache_mpage are a header, so offsets
3215 * in mpage are off by 2 compared to buf. Same for len.
3218 if (len
!= CACHE_MPAGE_LEN
- 2)
3221 wce
= buf
[0] & (1 << 2);
3224 * Check that read-only bits are not modified.
3226 ata_msense_caching(dev
->id
, mpage
, false);
3227 mpage
[2] &= ~(1 << 2);
3229 if (memcmp(mpage
+ 2, buf
, CACHE_MPAGE_LEN
- 2) != 0)
3232 tf
->flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
3233 tf
->protocol
= ATA_PROT_NODATA
;
3235 tf
->command
= ATA_CMD_SET_FEATURES
;
3236 tf
->feature
= wce
? SETFEATURES_WC_ON
: SETFEATURES_WC_OFF
;
3241 * ata_scsiop_mode_select - Simulate MODE SELECT 6, 10 commands
3242 * @qc: Storage for translated ATA taskfile
3244 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile.
3245 * Assume this is invoked for direct access devices (e.g. disks) only.
3246 * There should be no block descriptor for other device types.
3249 * spin_lock_irqsave(host lock)
3251 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd
*qc
)
3253 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
3254 const u8
*cdb
= scmd
->cmnd
;
3257 unsigned six_byte
, pg_len
, hdr_len
, bd_len
;
3262 six_byte
= (cdb
[0] == MODE_SELECT
);
3264 if (scmd
->cmd_len
< 5)
3270 if (scmd
->cmd_len
< 9)
3273 len
= (cdb
[7] << 8) + cdb
[8];
3277 /* We only support PF=1, SP=0. */
3278 if ((cdb
[1] & 0x11) != 0x10)
3281 /* Test early for possible overrun. */
3282 if (!scsi_sg_count(scmd
) || scsi_sglist(scmd
)->length
< len
)
3283 goto invalid_param_len
;
3285 p
= page_address(sg_page(scsi_sglist(scmd
)));
3287 /* Move past header and block descriptors. */
3289 goto invalid_param_len
;
3294 bd_len
= (p
[6] << 8) + p
[7];
3299 goto invalid_param_len
;
3300 if (bd_len
!= 0 && bd_len
!= 8)
3308 /* Parse both possible formats for the mode page headers. */
3312 goto invalid_param_len
;
3315 pg_len
= (p
[2] << 8) | p
[3];
3320 goto invalid_param_len
;
3329 * No mode subpages supported (yet) but asking for _all_
3330 * subpages may be valid
3332 if (spg
&& (spg
!= ALL_SUB_MPAGES
))
3335 goto invalid_param_len
;
3339 if (ata_mselect_caching(qc
, p
, pg_len
) < 0)
3343 default: /* invalid page code */
3348 * Only one page has changeable data, so we only support setting one
3357 /* "Invalid field in CDB" */
3358 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
3362 /* "Invalid field in parameter list" */
3363 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x26, 0x0);
3367 /* "Parameter list length error" */
3368 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x1a, 0x0);
3372 scmd
->result
= SAM_STAT_GOOD
;
3377 * ata_get_xlat_func - check if SCSI to ATA translation is possible
3379 * @cmd: SCSI command opcode to consider
3381 * Look up the SCSI command given, and determine whether the
3382 * SCSI command is to be translated or simulated.
3385 * Pointer to translation function if possible, %NULL if not.
3388 static inline ata_xlat_func_t
ata_get_xlat_func(struct ata_device
*dev
, u8 cmd
)
3398 return ata_scsi_rw_xlat
;
3401 return ata_scsi_write_same_xlat
;
3403 case SYNCHRONIZE_CACHE
:
3404 if (ata_try_flush_cache(dev
))
3405 return ata_scsi_flush_xlat
;
3410 return ata_scsi_verify_xlat
;
3414 return ata_scsi_pass_thru
;
3417 case MODE_SELECT_10
:
3418 return ata_scsi_mode_select_xlat
;
3422 return ata_scsi_start_stop_xlat
;
3429 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
3430 * @ap: ATA port to which the command was being sent
3431 * @cmd: SCSI command to dump
3433 * Prints the contents of a SCSI command via printk().
3436 static inline void ata_scsi_dump_cdb(struct ata_port
*ap
,
3437 struct scsi_cmnd
*cmd
)
3440 struct scsi_device
*scsidev
= cmd
->device
;
3441 u8
*scsicmd
= cmd
->cmnd
;
3443 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
3445 scsidev
->channel
, scsidev
->id
, scsidev
->lun
,
3446 scsicmd
[0], scsicmd
[1], scsicmd
[2], scsicmd
[3],
3447 scsicmd
[4], scsicmd
[5], scsicmd
[6], scsicmd
[7],
3452 static inline int __ata_scsi_queuecmd(struct scsi_cmnd
*scmd
,
3453 struct ata_device
*dev
)
3455 u8 scsi_op
= scmd
->cmnd
[0];
3456 ata_xlat_func_t xlat_func
;
3459 if (dev
->class == ATA_DEV_ATA
|| dev
->class == ATA_DEV_ZAC
) {
3460 if (unlikely(!scmd
->cmd_len
|| scmd
->cmd_len
> dev
->cdb_len
))
3463 xlat_func
= ata_get_xlat_func(dev
, scsi_op
);
3465 if (unlikely(!scmd
->cmd_len
))
3469 if (likely((scsi_op
!= ATA_16
) || !atapi_passthru16
)) {
3470 /* relay SCSI command to ATAPI device */
3471 int len
= COMMAND_SIZE(scsi_op
);
3472 if (unlikely(len
> scmd
->cmd_len
|| len
> dev
->cdb_len
))
3475 xlat_func
= atapi_xlat
;
3477 /* ATA_16 passthru, treat as an ATA command */
3478 if (unlikely(scmd
->cmd_len
> 16))
3481 xlat_func
= ata_get_xlat_func(dev
, scsi_op
);
3486 rc
= ata_scsi_translate(dev
, scmd
, xlat_func
);
3488 ata_scsi_simulate(dev
, scmd
);
3493 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
3494 scmd
->cmd_len
, scsi_op
, dev
->cdb_len
);
3495 scmd
->result
= DID_ERROR
<< 16;
3496 scmd
->scsi_done(scmd
);
3501 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
3502 * @shost: SCSI host of command to be sent
3503 * @cmd: SCSI command to be sent
3505 * In some cases, this function translates SCSI commands into
3506 * ATA taskfiles, and queues the taskfiles to be sent to
3507 * hardware. In other cases, this function simulates a
3508 * SCSI device by evaluating and responding to certain
3509 * SCSI commands. This creates the overall effect of
3510 * ATA and ATAPI devices appearing as SCSI devices.
3516 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3519 int ata_scsi_queuecmd(struct Scsi_Host
*shost
, struct scsi_cmnd
*cmd
)
3521 struct ata_port
*ap
;
3522 struct ata_device
*dev
;
3523 struct scsi_device
*scsidev
= cmd
->device
;
3525 unsigned long irq_flags
;
3527 ap
= ata_shost_to_port(shost
);
3529 spin_lock_irqsave(ap
->lock
, irq_flags
);
3531 ata_scsi_dump_cdb(ap
, cmd
);
3533 dev
= ata_scsi_find_dev(ap
, scsidev
);
3535 rc
= __ata_scsi_queuecmd(cmd
, dev
);
3537 cmd
->result
= (DID_BAD_TARGET
<< 16);
3538 cmd
->scsi_done(cmd
);
3541 spin_unlock_irqrestore(ap
->lock
, irq_flags
);
3547 * ata_scsi_simulate - simulate SCSI command on ATA device
3548 * @dev: the target device
3549 * @cmd: SCSI command being sent to device.
3551 * Interprets and directly executes a select list of SCSI commands
3552 * that can be handled internally.
3555 * spin_lock_irqsave(host lock)
3558 void ata_scsi_simulate(struct ata_device
*dev
, struct scsi_cmnd
*cmd
)
3560 struct ata_scsi_args args
;
3561 const u8
*scsicmd
= cmd
->cmnd
;
3567 args
.done
= cmd
->scsi_done
;
3569 switch(scsicmd
[0]) {
3570 /* TODO: worth improving? */
3572 ata_scsi_invalid_field(cmd
);
3576 if (scsicmd
[1] & 2) /* is CmdDt set? */
3577 ata_scsi_invalid_field(cmd
);
3578 else if ((scsicmd
[1] & 1) == 0) /* is EVPD clear? */
3579 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_std
);
3580 else switch (scsicmd
[2]) {
3582 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_00
);
3585 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_80
);
3588 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_83
);
3591 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_89
);
3594 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_b0
);
3597 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_b1
);
3600 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_b2
);
3603 ata_scsi_invalid_field(cmd
);
3610 ata_scsi_rbuf_fill(&args
, ata_scsiop_mode_sense
);
3614 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
3617 case SERVICE_ACTION_IN_16
:
3618 if ((scsicmd
[1] & 0x1f) == SAI_READ_CAPACITY_16
)
3619 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
3621 ata_scsi_invalid_field(cmd
);
3625 ata_scsi_rbuf_fill(&args
, ata_scsiop_report_luns
);
3629 ata_scsi_set_sense(cmd
, 0, 0, 0);
3630 cmd
->result
= (DRIVER_SENSE
<< 24);
3631 cmd
->scsi_done(cmd
);
3634 /* if we reach this, then writeback caching is disabled,
3635 * turning this into a no-op.
3637 case SYNCHRONIZE_CACHE
:
3640 /* no-op's, complete with success */
3644 case TEST_UNIT_READY
:
3645 ata_scsi_rbuf_fill(&args
, ata_scsiop_noop
);
3648 case SEND_DIAGNOSTIC
:
3649 tmp8
= scsicmd
[1] & ~(1 << 3);
3650 if ((tmp8
== 0x4) && (!scsicmd
[3]) && (!scsicmd
[4]))
3651 ata_scsi_rbuf_fill(&args
, ata_scsiop_noop
);
3653 ata_scsi_invalid_field(cmd
);
3656 /* all other commands */
3658 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, 0x20, 0x0);
3659 /* "Invalid command operation code" */
3660 cmd
->scsi_done(cmd
);
3665 int ata_scsi_add_hosts(struct ata_host
*host
, struct scsi_host_template
*sht
)
3669 for (i
= 0; i
< host
->n_ports
; i
++) {
3670 struct ata_port
*ap
= host
->ports
[i
];
3671 struct Scsi_Host
*shost
;
3674 shost
= scsi_host_alloc(sht
, sizeof(struct ata_port
*));
3678 shost
->eh_noresume
= 1;
3679 *(struct ata_port
**)&shost
->hostdata
[0] = ap
;
3680 ap
->scsi_host
= shost
;
3682 shost
->transportt
= ata_scsi_transport_template
;
3683 shost
->unique_id
= ap
->print_id
;
3686 shost
->max_channel
= 1;
3687 shost
->max_cmd_len
= 16;
3688 shost
->no_write_same
= 1;
3690 /* Schedule policy is determined by ->qc_defer()
3691 * callback and it needs to see every deferred qc.
3692 * Set host_blocked to 1 to prevent SCSI midlayer from
3693 * automatically deferring requests.
3695 shost
->max_host_blocked
= 1;
3697 if (scsi_init_shared_tag_map(shost
, host
->n_tags
))
3700 rc
= scsi_add_host_with_dma(ap
->scsi_host
,
3701 &ap
->tdev
, ap
->host
->dev
);
3709 scsi_host_put(host
->ports
[i
]->scsi_host
);
3712 struct Scsi_Host
*shost
= host
->ports
[i
]->scsi_host
;
3714 scsi_remove_host(shost
);
3715 scsi_host_put(shost
);
3720 void ata_scsi_scan_host(struct ata_port
*ap
, int sync
)
3723 struct ata_device
*last_failed_dev
= NULL
;
3724 struct ata_link
*link
;
3725 struct ata_device
*dev
;
3728 ata_for_each_link(link
, ap
, EDGE
) {
3729 ata_for_each_dev(dev
, link
, ENABLED
) {
3730 struct scsi_device
*sdev
;
3731 int channel
= 0, id
= 0;
3736 if (ata_is_host_link(link
))
3739 channel
= link
->pmp
;
3741 sdev
= __scsi_add_device(ap
->scsi_host
, channel
, id
, 0,
3743 if (!IS_ERR(sdev
)) {
3745 scsi_device_put(sdev
);
3752 /* If we scanned while EH was in progress or allocation
3753 * failure occurred, scan would have failed silently. Check
3754 * whether all devices are attached.
3756 ata_for_each_link(link
, ap
, EDGE
) {
3757 ata_for_each_dev(dev
, link
, ENABLED
) {
3766 /* we're missing some SCSI devices */
3768 /* If caller requested synchrnous scan && we've made
3769 * any progress, sleep briefly and repeat.
3771 if (dev
!= last_failed_dev
) {
3773 last_failed_dev
= dev
;
3777 /* We might be failing to detect boot device, give it
3778 * a few more chances.
3786 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n");
3789 queue_delayed_work(system_long_wq
, &ap
->hotplug_task
,
3790 round_jiffies_relative(HZ
));
3794 * ata_scsi_offline_dev - offline attached SCSI device
3795 * @dev: ATA device to offline attached SCSI device for
3797 * This function is called from ata_eh_hotplug() and responsible
3798 * for taking the SCSI device attached to @dev offline. This
3799 * function is called with host lock which protects dev->sdev
3803 * spin_lock_irqsave(host lock)
3806 * 1 if attached SCSI device exists, 0 otherwise.
3808 int ata_scsi_offline_dev(struct ata_device
*dev
)
3811 scsi_device_set_state(dev
->sdev
, SDEV_OFFLINE
);
3818 * ata_scsi_remove_dev - remove attached SCSI device
3819 * @dev: ATA device to remove attached SCSI device for
3821 * This function is called from ata_eh_scsi_hotplug() and
3822 * responsible for removing the SCSI device attached to @dev.
3825 * Kernel thread context (may sleep).
3827 static void ata_scsi_remove_dev(struct ata_device
*dev
)
3829 struct ata_port
*ap
= dev
->link
->ap
;
3830 struct scsi_device
*sdev
;
3831 unsigned long flags
;
3833 /* Alas, we need to grab scan_mutex to ensure SCSI device
3834 * state doesn't change underneath us and thus
3835 * scsi_device_get() always succeeds. The mutex locking can
3836 * be removed if there is __scsi_device_get() interface which
3837 * increments reference counts regardless of device state.
3839 mutex_lock(&ap
->scsi_host
->scan_mutex
);
3840 spin_lock_irqsave(ap
->lock
, flags
);
3842 /* clearing dev->sdev is protected by host lock */
3847 /* If user initiated unplug races with us, sdev can go
3848 * away underneath us after the host lock and
3849 * scan_mutex are released. Hold onto it.
3851 if (scsi_device_get(sdev
) == 0) {
3852 /* The following ensures the attached sdev is
3853 * offline on return from ata_scsi_offline_dev()
3854 * regardless it wins or loses the race
3855 * against this function.
3857 scsi_device_set_state(sdev
, SDEV_OFFLINE
);
3864 spin_unlock_irqrestore(ap
->lock
, flags
);
3865 mutex_unlock(&ap
->scsi_host
->scan_mutex
);
3868 ata_dev_info(dev
, "detaching (SCSI %s)\n",
3869 dev_name(&sdev
->sdev_gendev
));
3871 scsi_remove_device(sdev
);
3872 scsi_device_put(sdev
);
3876 static void ata_scsi_handle_link_detach(struct ata_link
*link
)
3878 struct ata_port
*ap
= link
->ap
;
3879 struct ata_device
*dev
;
3881 ata_for_each_dev(dev
, link
, ALL
) {
3882 unsigned long flags
;
3884 if (!(dev
->flags
& ATA_DFLAG_DETACHED
))
3887 spin_lock_irqsave(ap
->lock
, flags
);
3888 dev
->flags
&= ~ATA_DFLAG_DETACHED
;
3889 spin_unlock_irqrestore(ap
->lock
, flags
);
3891 if (zpodd_dev_enabled(dev
))
3894 ata_scsi_remove_dev(dev
);
3899 * ata_scsi_media_change_notify - send media change event
3900 * @dev: Pointer to the disk device with media change event
3902 * Tell the block layer to send a media change notification
3906 * spin_lock_irqsave(host lock)
3908 void ata_scsi_media_change_notify(struct ata_device
*dev
)
3911 sdev_evt_send_simple(dev
->sdev
, SDEV_EVT_MEDIA_CHANGE
,
3916 * ata_scsi_hotplug - SCSI part of hotplug
3917 * @work: Pointer to ATA port to perform SCSI hotplug on
3919 * Perform SCSI part of hotplug. It's executed from a separate
3920 * workqueue after EH completes. This is necessary because SCSI
3921 * hot plugging requires working EH and hot unplugging is
3922 * synchronized with hot plugging with a mutex.
3925 * Kernel thread context (may sleep).
3927 void ata_scsi_hotplug(struct work_struct
*work
)
3929 struct ata_port
*ap
=
3930 container_of(work
, struct ata_port
, hotplug_task
.work
);
3933 if (ap
->pflags
& ATA_PFLAG_UNLOADING
) {
3934 DPRINTK("ENTER/EXIT - unloading\n");
3941 * The block layer suspend/resume path is fundamentally broken due
3942 * to freezable kthreads and workqueue and may deadlock if a block
3943 * device gets removed while resume is in progress. I don't know
3944 * what the solution is short of removing freezable kthreads and
3945 * workqueues altogether.
3947 * The following is an ugly hack to avoid kicking off device
3948 * removal while freezer is active. This is a joke but does avoid
3949 * this particular deadlock scenario.
3951 * https://bugzilla.kernel.org/show_bug.cgi?id=62801
3952 * http://marc.info/?l=linux-kernel&m=138695698516487
3954 #ifdef CONFIG_FREEZER
3960 mutex_lock(&ap
->scsi_scan_mutex
);
3962 /* Unplug detached devices. We cannot use link iterator here
3963 * because PMP links have to be scanned even if PMP is
3964 * currently not attached. Iterate manually.
3966 ata_scsi_handle_link_detach(&ap
->link
);
3968 for (i
= 0; i
< SATA_PMP_MAX_PORTS
; i
++)
3969 ata_scsi_handle_link_detach(&ap
->pmp_link
[i
]);
3971 /* scan for new ones */
3972 ata_scsi_scan_host(ap
, 0);
3974 mutex_unlock(&ap
->scsi_scan_mutex
);
3979 * ata_scsi_user_scan - indication for user-initiated bus scan
3980 * @shost: SCSI host to scan
3981 * @channel: Channel to scan
3985 * This function is called when user explicitly requests bus
3986 * scan. Set probe pending flag and invoke EH.
3989 * SCSI layer (we don't care)
3994 int ata_scsi_user_scan(struct Scsi_Host
*shost
, unsigned int channel
,
3995 unsigned int id
, u64 lun
)
3997 struct ata_port
*ap
= ata_shost_to_port(shost
);
3998 unsigned long flags
;
4001 if (!ap
->ops
->error_handler
)
4004 if (lun
!= SCAN_WILD_CARD
&& lun
)
4007 if (!sata_pmp_attached(ap
)) {
4008 if (channel
!= SCAN_WILD_CARD
&& channel
)
4012 if (id
!= SCAN_WILD_CARD
&& id
)
4017 spin_lock_irqsave(ap
->lock
, flags
);
4019 if (devno
== SCAN_WILD_CARD
) {
4020 struct ata_link
*link
;
4022 ata_for_each_link(link
, ap
, EDGE
) {
4023 struct ata_eh_info
*ehi
= &link
->eh_info
;
4024 ehi
->probe_mask
|= ATA_ALL_DEVICES
;
4025 ehi
->action
|= ATA_EH_RESET
;
4028 struct ata_device
*dev
= ata_find_dev(ap
, devno
);
4031 struct ata_eh_info
*ehi
= &dev
->link
->eh_info
;
4032 ehi
->probe_mask
|= 1 << dev
->devno
;
4033 ehi
->action
|= ATA_EH_RESET
;
4039 ata_port_schedule_eh(ap
);
4040 spin_unlock_irqrestore(ap
->lock
, flags
);
4041 ata_port_wait_eh(ap
);
4043 spin_unlock_irqrestore(ap
->lock
, flags
);
4049 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
4050 * @work: Pointer to ATA port to perform scsi_rescan_device()
4052 * After ATA pass thru (SAT) commands are executed successfully,
4053 * libata need to propagate the changes to SCSI layer.
4056 * Kernel thread context (may sleep).
4058 void ata_scsi_dev_rescan(struct work_struct
*work
)
4060 struct ata_port
*ap
=
4061 container_of(work
, struct ata_port
, scsi_rescan_task
);
4062 struct ata_link
*link
;
4063 struct ata_device
*dev
;
4064 unsigned long flags
;
4066 mutex_lock(&ap
->scsi_scan_mutex
);
4067 spin_lock_irqsave(ap
->lock
, flags
);
4069 ata_for_each_link(link
, ap
, EDGE
) {
4070 ata_for_each_dev(dev
, link
, ENABLED
) {
4071 struct scsi_device
*sdev
= dev
->sdev
;
4075 if (scsi_device_get(sdev
))
4078 spin_unlock_irqrestore(ap
->lock
, flags
);
4079 scsi_rescan_device(&(sdev
->sdev_gendev
));
4080 scsi_device_put(sdev
);
4081 spin_lock_irqsave(ap
->lock
, flags
);
4085 spin_unlock_irqrestore(ap
->lock
, flags
);
4086 mutex_unlock(&ap
->scsi_scan_mutex
);
4090 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
4091 * @host: ATA host container for all SAS ports
4092 * @port_info: Information from low-level host driver
4093 * @shost: SCSI host that the scsi device is attached to
4096 * PCI/etc. bus probe sem.
4099 * ata_port pointer on success / NULL on failure.
4102 struct ata_port
*ata_sas_port_alloc(struct ata_host
*host
,
4103 struct ata_port_info
*port_info
,
4104 struct Scsi_Host
*shost
)
4106 struct ata_port
*ap
;
4108 ap
= ata_port_alloc(host
);
4113 ap
->lock
= &host
->lock
;
4114 ap
->pio_mask
= port_info
->pio_mask
;
4115 ap
->mwdma_mask
= port_info
->mwdma_mask
;
4116 ap
->udma_mask
= port_info
->udma_mask
;
4117 ap
->flags
|= port_info
->flags
;
4118 ap
->ops
= port_info
->port_ops
;
4119 ap
->cbl
= ATA_CBL_SATA
;
4123 EXPORT_SYMBOL_GPL(ata_sas_port_alloc
);
4126 * ata_sas_port_start - Set port up for dma.
4127 * @ap: Port to initialize
4129 * Called just after data structures for each port are
4132 * May be used as the port_start() entry in ata_port_operations.
4135 * Inherited from caller.
4137 int ata_sas_port_start(struct ata_port
*ap
)
4140 * the port is marked as frozen at allocation time, but if we don't
4141 * have new eh, we won't thaw it
4143 if (!ap
->ops
->error_handler
)
4144 ap
->pflags
&= ~ATA_PFLAG_FROZEN
;
4147 EXPORT_SYMBOL_GPL(ata_sas_port_start
);
4150 * ata_port_stop - Undo ata_sas_port_start()
4151 * @ap: Port to shut down
4153 * May be used as the port_stop() entry in ata_port_operations.
4156 * Inherited from caller.
4159 void ata_sas_port_stop(struct ata_port
*ap
)
4162 EXPORT_SYMBOL_GPL(ata_sas_port_stop
);
4165 * ata_sas_async_probe - simply schedule probing and return
4166 * @ap: Port to probe
4168 * For batch scheduling of probe for sas attached ata devices, assumes
4169 * the port has already been through ata_sas_port_init()
4171 void ata_sas_async_probe(struct ata_port
*ap
)
4173 __ata_port_probe(ap
);
4175 EXPORT_SYMBOL_GPL(ata_sas_async_probe
);
4177 int ata_sas_sync_probe(struct ata_port
*ap
)
4179 return ata_port_probe(ap
);
4181 EXPORT_SYMBOL_GPL(ata_sas_sync_probe
);
4185 * ata_sas_port_init - Initialize a SATA device
4186 * @ap: SATA port to initialize
4189 * PCI/etc. bus probe sem.
4192 * Zero on success, non-zero on error.
4195 int ata_sas_port_init(struct ata_port
*ap
)
4197 int rc
= ap
->ops
->port_start(ap
);
4201 ap
->print_id
= atomic_inc_return(&ata_print_id
);
4204 EXPORT_SYMBOL_GPL(ata_sas_port_init
);
4207 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
4208 * @ap: SATA port to destroy
4212 void ata_sas_port_destroy(struct ata_port
*ap
)
4214 if (ap
->ops
->port_stop
)
4215 ap
->ops
->port_stop(ap
);
4218 EXPORT_SYMBOL_GPL(ata_sas_port_destroy
);
4221 * ata_sas_slave_configure - Default slave_config routine for libata devices
4222 * @sdev: SCSI device to configure
4223 * @ap: ATA port to which SCSI device is attached
4229 int ata_sas_slave_configure(struct scsi_device
*sdev
, struct ata_port
*ap
)
4231 ata_scsi_sdev_config(sdev
);
4232 ata_scsi_dev_config(sdev
, ap
->link
.device
);
4235 EXPORT_SYMBOL_GPL(ata_sas_slave_configure
);
4238 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
4239 * @cmd: SCSI command to be sent
4240 * @ap: ATA port to which the command is being sent
4243 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
4247 int ata_sas_queuecmd(struct scsi_cmnd
*cmd
, struct ata_port
*ap
)
4251 ata_scsi_dump_cdb(ap
, cmd
);
4253 if (likely(ata_dev_enabled(ap
->link
.device
)))
4254 rc
= __ata_scsi_queuecmd(cmd
, ap
->link
.device
);
4256 cmd
->result
= (DID_BAD_TARGET
<< 16);
4257 cmd
->scsi_done(cmd
);
4261 EXPORT_SYMBOL_GPL(ata_sas_queuecmd
);
4263 int ata_sas_allocate_tag(struct ata_port
*ap
)
4265 unsigned int max_queue
= ap
->host
->n_tags
;
4266 unsigned int i
, tag
;
4268 for (i
= 0, tag
= ap
->sas_last_tag
+ 1; i
< max_queue
; i
++, tag
++) {
4269 tag
= tag
< max_queue
? tag
: 0;
4271 /* the last tag is reserved for internal command. */
4272 if (tag
== ATA_TAG_INTERNAL
)
4275 if (!test_and_set_bit(tag
, &ap
->sas_tag_allocated
)) {
4276 ap
->sas_last_tag
= tag
;
4283 void ata_sas_free_tag(unsigned int tag
, struct ata_port
*ap
)
4285 clear_bit(tag
, &ap
->sas_tag_allocated
);