1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * libata-scsi.c - helper library for ATA
5 * Maintained by: Tejun Heo <tj@kernel.org>
6 * Please ALWAYS copy linux-ide@vger.kernel.org
9 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
10 * Copyright 2003-2004 Jeff Garzik
12 * libata documentation is available via 'make {ps|pdf}docs',
13 * as Documentation/driver-api/libata.rst
15 * Hardware documentation available from
16 * - http://www.t10.org/
17 * - http://www.t13.org/
20 #include <linux/slab.h>
21 #include <linux/kernel.h>
22 #include <linux/blkdev.h>
23 #include <linux/spinlock.h>
24 #include <linux/export.h>
25 #include <scsi/scsi.h>
26 #include <scsi/scsi_host.h>
27 #include <scsi/scsi_cmnd.h>
28 #include <scsi/scsi_eh.h>
29 #include <scsi/scsi_device.h>
30 #include <scsi/scsi_tcq.h>
31 #include <scsi/scsi_transport.h>
32 #include <linux/libata.h>
33 #include <linux/hdreg.h>
34 #include <linux/uaccess.h>
35 #include <linux/suspend.h>
36 #include <asm/unaligned.h>
37 #include <linux/ioprio.h>
40 #include "libata-transport.h"
42 #define ATA_SCSI_RBUF_SIZE 4096
44 static DEFINE_SPINLOCK(ata_scsi_rbuf_lock
);
45 static u8 ata_scsi_rbuf
[ATA_SCSI_RBUF_SIZE
];
47 typedef unsigned int (*ata_xlat_func_t
)(struct ata_queued_cmd
*qc
);
49 static struct ata_device
*__ata_scsi_find_dev(struct ata_port
*ap
,
50 const struct scsi_device
*scsidev
);
51 static struct ata_device
*ata_scsi_find_dev(struct ata_port
*ap
,
52 const struct scsi_device
*scsidev
);
54 #define RW_RECOVERY_MPAGE 0x1
55 #define RW_RECOVERY_MPAGE_LEN 12
56 #define CACHE_MPAGE 0x8
57 #define CACHE_MPAGE_LEN 20
58 #define CONTROL_MPAGE 0xa
59 #define CONTROL_MPAGE_LEN 12
60 #define ALL_MPAGES 0x3f
61 #define ALL_SUB_MPAGES 0xff
64 static const u8 def_rw_recovery_mpage
[RW_RECOVERY_MPAGE_LEN
] = {
66 RW_RECOVERY_MPAGE_LEN
- 2,
68 0, /* read retry count */
70 0, /* write retry count */
74 static const u8 def_cache_mpage
[CACHE_MPAGE_LEN
] = {
77 0, /* contains WCE, needs to be 0 for logic */
78 0, 0, 0, 0, 0, 0, 0, 0, 0,
79 0, /* contains DRA, needs to be 0 for logic */
83 static const u8 def_control_mpage
[CONTROL_MPAGE_LEN
] = {
85 CONTROL_MPAGE_LEN
- 2,
86 2, /* DSENSE=0, GLTSD=1 */
87 0, /* [QAM+QERR may be 1, see 05-359r1] */
88 0, 0, 0, 0, 0xff, 0xff,
89 0, 30 /* extended self test time, see 05-359r1 */
92 static const char *ata_lpm_policy_names
[] = {
93 [ATA_LPM_UNKNOWN
] = "max_performance",
94 [ATA_LPM_MAX_POWER
] = "max_performance",
95 [ATA_LPM_MED_POWER
] = "medium_power",
96 [ATA_LPM_MED_POWER_WITH_DIPM
] = "med_power_with_dipm",
97 [ATA_LPM_MIN_POWER_WITH_PARTIAL
] = "min_power_with_partial",
98 [ATA_LPM_MIN_POWER
] = "min_power",
101 static ssize_t
ata_scsi_lpm_store(struct device
*device
,
102 struct device_attribute
*attr
,
103 const char *buf
, size_t count
)
105 struct Scsi_Host
*shost
= class_to_shost(device
);
106 struct ata_port
*ap
= ata_shost_to_port(shost
);
107 struct ata_link
*link
;
108 struct ata_device
*dev
;
109 enum ata_lpm_policy policy
;
112 /* UNKNOWN is internal state, iterate from MAX_POWER */
113 for (policy
= ATA_LPM_MAX_POWER
;
114 policy
< ARRAY_SIZE(ata_lpm_policy_names
); policy
++) {
115 const char *name
= ata_lpm_policy_names
[policy
];
117 if (strncmp(name
, buf
, strlen(name
)) == 0)
120 if (policy
== ARRAY_SIZE(ata_lpm_policy_names
))
123 spin_lock_irqsave(ap
->lock
, flags
);
125 ata_for_each_link(link
, ap
, EDGE
) {
126 ata_for_each_dev(dev
, &ap
->link
, ENABLED
) {
127 if (dev
->horkage
& ATA_HORKAGE_NOLPM
) {
134 ap
->target_lpm_policy
= policy
;
135 ata_port_schedule_eh(ap
);
137 spin_unlock_irqrestore(ap
->lock
, flags
);
141 static ssize_t
ata_scsi_lpm_show(struct device
*dev
,
142 struct device_attribute
*attr
, char *buf
)
144 struct Scsi_Host
*shost
= class_to_shost(dev
);
145 struct ata_port
*ap
= ata_shost_to_port(shost
);
147 if (ap
->target_lpm_policy
>= ARRAY_SIZE(ata_lpm_policy_names
))
150 return snprintf(buf
, PAGE_SIZE
, "%s\n",
151 ata_lpm_policy_names
[ap
->target_lpm_policy
]);
153 DEVICE_ATTR(link_power_management_policy
, S_IRUGO
| S_IWUSR
,
154 ata_scsi_lpm_show
, ata_scsi_lpm_store
);
155 EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy
);
157 static ssize_t
ata_scsi_park_show(struct device
*device
,
158 struct device_attribute
*attr
, char *buf
)
160 struct scsi_device
*sdev
= to_scsi_device(device
);
162 struct ata_link
*link
;
163 struct ata_device
*dev
;
165 unsigned int uninitialized_var(msecs
);
168 ap
= ata_shost_to_port(sdev
->host
);
170 spin_lock_irq(ap
->lock
);
171 dev
= ata_scsi_find_dev(ap
, sdev
);
176 if (dev
->flags
& ATA_DFLAG_NO_UNLOAD
) {
183 if (ap
->pflags
& ATA_PFLAG_EH_IN_PROGRESS
&&
184 link
->eh_context
.unloaded_mask
& (1 << dev
->devno
) &&
185 time_after(dev
->unpark_deadline
, now
))
186 msecs
= jiffies_to_msecs(dev
->unpark_deadline
- now
);
191 spin_unlock_irq(ap
->lock
);
193 return rc
? rc
: snprintf(buf
, 20, "%u\n", msecs
);
196 static ssize_t
ata_scsi_park_store(struct device
*device
,
197 struct device_attribute
*attr
,
198 const char *buf
, size_t len
)
200 struct scsi_device
*sdev
= to_scsi_device(device
);
202 struct ata_device
*dev
;
207 rc
= kstrtol(buf
, 10, &input
);
212 if (input
> ATA_TMOUT_MAX_PARK
) {
214 input
= ATA_TMOUT_MAX_PARK
;
217 ap
= ata_shost_to_port(sdev
->host
);
219 spin_lock_irqsave(ap
->lock
, flags
);
220 dev
= ata_scsi_find_dev(ap
, sdev
);
221 if (unlikely(!dev
)) {
225 if (dev
->class != ATA_DEV_ATA
&&
226 dev
->class != ATA_DEV_ZAC
) {
232 if (dev
->flags
& ATA_DFLAG_NO_UNLOAD
) {
237 dev
->unpark_deadline
= ata_deadline(jiffies
, input
);
238 dev
->link
->eh_info
.dev_action
[dev
->devno
] |= ATA_EH_PARK
;
239 ata_port_schedule_eh(ap
);
240 complete(&ap
->park_req_pending
);
244 dev
->flags
&= ~ATA_DFLAG_NO_UNLOAD
;
247 dev
->flags
|= ATA_DFLAG_NO_UNLOAD
;
252 spin_unlock_irqrestore(ap
->lock
, flags
);
254 return rc
? rc
: len
;
256 DEVICE_ATTR(unload_heads
, S_IRUGO
| S_IWUSR
,
257 ata_scsi_park_show
, ata_scsi_park_store
);
258 EXPORT_SYMBOL_GPL(dev_attr_unload_heads
);
260 static ssize_t
ata_ncq_prio_enable_show(struct device
*device
,
261 struct device_attribute
*attr
,
264 struct scsi_device
*sdev
= to_scsi_device(device
);
266 struct ata_device
*dev
;
267 bool ncq_prio_enable
;
270 ap
= ata_shost_to_port(sdev
->host
);
272 spin_lock_irq(ap
->lock
);
273 dev
= ata_scsi_find_dev(ap
, sdev
);
279 ncq_prio_enable
= dev
->flags
& ATA_DFLAG_NCQ_PRIO_ENABLE
;
282 spin_unlock_irq(ap
->lock
);
284 return rc
? rc
: snprintf(buf
, 20, "%u\n", ncq_prio_enable
);
287 static ssize_t
ata_ncq_prio_enable_store(struct device
*device
,
288 struct device_attribute
*attr
,
289 const char *buf
, size_t len
)
291 struct scsi_device
*sdev
= to_scsi_device(device
);
293 struct ata_device
*dev
;
297 rc
= kstrtol(buf
, 10, &input
);
300 if ((input
< 0) || (input
> 1))
303 ap
= ata_shost_to_port(sdev
->host
);
304 dev
= ata_scsi_find_dev(ap
, sdev
);
308 spin_lock_irq(ap
->lock
);
310 dev
->flags
|= ATA_DFLAG_NCQ_PRIO_ENABLE
;
312 dev
->flags
&= ~ATA_DFLAG_NCQ_PRIO_ENABLE
;
314 dev
->link
->eh_info
.action
|= ATA_EH_REVALIDATE
;
315 dev
->link
->eh_info
.flags
|= ATA_EHI_QUIET
;
316 ata_port_schedule_eh(ap
);
317 spin_unlock_irq(ap
->lock
);
319 ata_port_wait_eh(ap
);
322 spin_lock_irq(ap
->lock
);
323 if (!(dev
->flags
& ATA_DFLAG_NCQ_PRIO
)) {
324 dev
->flags
&= ~ATA_DFLAG_NCQ_PRIO_ENABLE
;
327 spin_unlock_irq(ap
->lock
);
330 return rc
? rc
: len
;
333 DEVICE_ATTR(ncq_prio_enable
, S_IRUGO
| S_IWUSR
,
334 ata_ncq_prio_enable_show
, ata_ncq_prio_enable_store
);
335 EXPORT_SYMBOL_GPL(dev_attr_ncq_prio_enable
);
337 void ata_scsi_set_sense(struct ata_device
*dev
, struct scsi_cmnd
*cmd
,
338 u8 sk
, u8 asc
, u8 ascq
)
340 bool d_sense
= (dev
->flags
& ATA_DFLAG_D_SENSE
);
345 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
347 scsi_build_sense_buffer(d_sense
, cmd
->sense_buffer
, sk
, asc
, ascq
);
350 void ata_scsi_set_sense_information(struct ata_device
*dev
,
351 struct scsi_cmnd
*cmd
,
352 const struct ata_taskfile
*tf
)
359 information
= ata_tf_read_block(tf
, dev
);
360 if (information
== U64_MAX
)
363 scsi_set_sense_information(cmd
->sense_buffer
,
364 SCSI_SENSE_BUFFERSIZE
, information
);
367 static void ata_scsi_set_invalid_field(struct ata_device
*dev
,
368 struct scsi_cmnd
*cmd
, u16 field
, u8 bit
)
370 ata_scsi_set_sense(dev
, cmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
371 /* "Invalid field in CDB" */
372 scsi_set_sense_field_pointer(cmd
->sense_buffer
, SCSI_SENSE_BUFFERSIZE
,
376 static void ata_scsi_set_invalid_parameter(struct ata_device
*dev
,
377 struct scsi_cmnd
*cmd
, u16 field
)
379 /* "Invalid field in parameter list" */
380 ata_scsi_set_sense(dev
, cmd
, ILLEGAL_REQUEST
, 0x26, 0x0);
381 scsi_set_sense_field_pointer(cmd
->sense_buffer
, SCSI_SENSE_BUFFERSIZE
,
386 ata_scsi_em_message_store(struct device
*dev
, struct device_attribute
*attr
,
387 const char *buf
, size_t count
)
389 struct Scsi_Host
*shost
= class_to_shost(dev
);
390 struct ata_port
*ap
= ata_shost_to_port(shost
);
391 if (ap
->ops
->em_store
&& (ap
->flags
& ATA_FLAG_EM
))
392 return ap
->ops
->em_store(ap
, buf
, count
);
397 ata_scsi_em_message_show(struct device
*dev
, struct device_attribute
*attr
,
400 struct Scsi_Host
*shost
= class_to_shost(dev
);
401 struct ata_port
*ap
= ata_shost_to_port(shost
);
403 if (ap
->ops
->em_show
&& (ap
->flags
& ATA_FLAG_EM
))
404 return ap
->ops
->em_show(ap
, buf
);
407 DEVICE_ATTR(em_message
, S_IRUGO
| S_IWUSR
,
408 ata_scsi_em_message_show
, ata_scsi_em_message_store
);
409 EXPORT_SYMBOL_GPL(dev_attr_em_message
);
412 ata_scsi_em_message_type_show(struct device
*dev
, struct device_attribute
*attr
,
415 struct Scsi_Host
*shost
= class_to_shost(dev
);
416 struct ata_port
*ap
= ata_shost_to_port(shost
);
418 return snprintf(buf
, 23, "%d\n", ap
->em_message_type
);
420 DEVICE_ATTR(em_message_type
, S_IRUGO
,
421 ata_scsi_em_message_type_show
, NULL
);
422 EXPORT_SYMBOL_GPL(dev_attr_em_message_type
);
425 ata_scsi_activity_show(struct device
*dev
, struct device_attribute
*attr
,
428 struct scsi_device
*sdev
= to_scsi_device(dev
);
429 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
430 struct ata_device
*atadev
= ata_scsi_find_dev(ap
, sdev
);
432 if (atadev
&& ap
->ops
->sw_activity_show
&&
433 (ap
->flags
& ATA_FLAG_SW_ACTIVITY
))
434 return ap
->ops
->sw_activity_show(atadev
, buf
);
439 ata_scsi_activity_store(struct device
*dev
, struct device_attribute
*attr
,
440 const char *buf
, size_t count
)
442 struct scsi_device
*sdev
= to_scsi_device(dev
);
443 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
444 struct ata_device
*atadev
= ata_scsi_find_dev(ap
, sdev
);
445 enum sw_activity val
;
448 if (atadev
&& ap
->ops
->sw_activity_store
&&
449 (ap
->flags
& ATA_FLAG_SW_ACTIVITY
)) {
450 val
= simple_strtoul(buf
, NULL
, 0);
452 case OFF
: case BLINK_ON
: case BLINK_OFF
:
453 rc
= ap
->ops
->sw_activity_store(atadev
, val
);
462 DEVICE_ATTR(sw_activity
, S_IWUSR
| S_IRUGO
, ata_scsi_activity_show
,
463 ata_scsi_activity_store
);
464 EXPORT_SYMBOL_GPL(dev_attr_sw_activity
);
466 struct device_attribute
*ata_common_sdev_attrs
[] = {
467 &dev_attr_unload_heads
,
468 &dev_attr_ncq_prio_enable
,
471 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs
);
474 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
475 * @sdev: SCSI device for which BIOS geometry is to be determined
476 * @bdev: block device associated with @sdev
477 * @capacity: capacity of SCSI device
478 * @geom: location to which geometry will be output
480 * Generic bios head/sector/cylinder calculator
481 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
482 * mapping. Some situations may arise where the disk is not
483 * bootable if this is not used.
486 * Defined by the SCSI layer. We don't really care.
491 int ata_std_bios_param(struct scsi_device
*sdev
, struct block_device
*bdev
,
492 sector_t capacity
, int geom
[])
496 sector_div(capacity
, 255*63);
503 * ata_scsi_unlock_native_capacity - unlock native capacity
504 * @sdev: SCSI device to adjust device capacity for
506 * This function is called if a partition on @sdev extends beyond
507 * the end of the device. It requests EH to unlock HPA.
510 * Defined by the SCSI layer. Might sleep.
512 void ata_scsi_unlock_native_capacity(struct scsi_device
*sdev
)
514 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
515 struct ata_device
*dev
;
518 spin_lock_irqsave(ap
->lock
, flags
);
520 dev
= ata_scsi_find_dev(ap
, sdev
);
521 if (dev
&& dev
->n_sectors
< dev
->n_native_sectors
) {
522 dev
->flags
|= ATA_DFLAG_UNLOCK_HPA
;
523 dev
->link
->eh_info
.action
|= ATA_EH_RESET
;
524 ata_port_schedule_eh(ap
);
527 spin_unlock_irqrestore(ap
->lock
, flags
);
528 ata_port_wait_eh(ap
);
532 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
534 * @sdev: SCSI device to get identify data for
535 * @arg: User buffer area for identify data
538 * Defined by the SCSI layer. We don't really care.
541 * Zero on success, negative errno on error.
543 static int ata_get_identity(struct ata_port
*ap
, struct scsi_device
*sdev
,
546 struct ata_device
*dev
= ata_scsi_find_dev(ap
, sdev
);
547 u16 __user
*dst
= arg
;
553 if (copy_to_user(dst
, dev
->id
, ATA_ID_WORDS
* sizeof(u16
)))
556 ata_id_string(dev
->id
, buf
, ATA_ID_PROD
, ATA_ID_PROD_LEN
);
557 if (copy_to_user(dst
+ ATA_ID_PROD
, buf
, ATA_ID_PROD_LEN
))
560 ata_id_string(dev
->id
, buf
, ATA_ID_FW_REV
, ATA_ID_FW_REV_LEN
);
561 if (copy_to_user(dst
+ ATA_ID_FW_REV
, buf
, ATA_ID_FW_REV_LEN
))
564 ata_id_string(dev
->id
, buf
, ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
565 if (copy_to_user(dst
+ ATA_ID_SERNO
, buf
, ATA_ID_SERNO_LEN
))
572 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
573 * @scsidev: Device to which we are issuing command
574 * @arg: User provided data for issuing command
577 * Defined by the SCSI layer. We don't really care.
580 * Zero on success, negative errno on error.
582 int ata_cmd_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
585 u8 sensebuf
[SCSI_SENSE_BUFFERSIZE
];
586 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
587 u8 args
[4], *argbuf
= NULL
;
589 enum dma_data_direction data_dir
;
590 struct scsi_sense_hdr sshdr
;
596 if (copy_from_user(args
, arg
, sizeof(args
)))
599 memset(sensebuf
, 0, sizeof(sensebuf
));
600 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
603 argsize
= ATA_SECT_SIZE
* args
[3];
604 argbuf
= kmalloc(argsize
, GFP_KERNEL
);
605 if (argbuf
== NULL
) {
610 scsi_cmd
[1] = (4 << 1); /* PIO Data-in */
611 scsi_cmd
[2] = 0x0e; /* no off.line or cc, read from dev,
612 block count in sector count field */
613 data_dir
= DMA_FROM_DEVICE
;
615 scsi_cmd
[1] = (3 << 1); /* Non-data */
616 scsi_cmd
[2] = 0x20; /* cc but no off.line or data xfer */
620 scsi_cmd
[0] = ATA_16
;
622 scsi_cmd
[4] = args
[2];
623 if (args
[0] == ATA_CMD_SMART
) { /* hack -- ide driver does this too */
624 scsi_cmd
[6] = args
[3];
625 scsi_cmd
[8] = args
[1];
626 scsi_cmd
[10] = ATA_SMART_LBAM_PASS
;
627 scsi_cmd
[12] = ATA_SMART_LBAH_PASS
;
629 scsi_cmd
[6] = args
[1];
631 scsi_cmd
[14] = args
[0];
633 /* Good values for timeout and retries? Values below
634 from scsi_ioctl_send_command() for default case... */
635 cmd_result
= scsi_execute(scsidev
, scsi_cmd
, data_dir
, argbuf
, argsize
,
636 sensebuf
, &sshdr
, (10*HZ
), 5, 0, 0, NULL
);
638 if (driver_byte(cmd_result
) == DRIVER_SENSE
) {/* sense data available */
639 u8
*desc
= sensebuf
+ 8;
640 cmd_result
&= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
642 /* If we set cc then ATA pass-through will cause a
643 * check condition even if no error. Filter that. */
644 if (cmd_result
& SAM_STAT_CHECK_CONDITION
) {
645 if (sshdr
.sense_key
== RECOVERED_ERROR
&&
646 sshdr
.asc
== 0 && sshdr
.ascq
== 0x1d)
647 cmd_result
&= ~SAM_STAT_CHECK_CONDITION
;
650 /* Send userspace a few ATA registers (same as drivers/ide) */
651 if (sensebuf
[0] == 0x72 && /* format is "descriptor" */
652 desc
[0] == 0x09) { /* code is "ATA Descriptor" */
653 args
[0] = desc
[13]; /* status */
654 args
[1] = desc
[3]; /* error */
655 args
[2] = desc
[5]; /* sector count (0:7) */
656 if (copy_to_user(arg
, args
, sizeof(args
)))
668 && copy_to_user(arg
+ sizeof(args
), argbuf
, argsize
))
676 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
677 * @scsidev: Device to which we are issuing command
678 * @arg: User provided data for issuing command
681 * Defined by the SCSI layer. We don't really care.
684 * Zero on success, negative errno on error.
686 int ata_task_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
689 u8 sensebuf
[SCSI_SENSE_BUFFERSIZE
];
690 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
692 struct scsi_sense_hdr sshdr
;
698 if (copy_from_user(args
, arg
, sizeof(args
)))
701 memset(sensebuf
, 0, sizeof(sensebuf
));
702 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
703 scsi_cmd
[0] = ATA_16
;
704 scsi_cmd
[1] = (3 << 1); /* Non-data */
705 scsi_cmd
[2] = 0x20; /* cc but no off.line or data xfer */
706 scsi_cmd
[4] = args
[1];
707 scsi_cmd
[6] = args
[2];
708 scsi_cmd
[8] = args
[3];
709 scsi_cmd
[10] = args
[4];
710 scsi_cmd
[12] = args
[5];
711 scsi_cmd
[13] = args
[6] & 0x4f;
712 scsi_cmd
[14] = args
[0];
714 /* Good values for timeout and retries? Values below
715 from scsi_ioctl_send_command() for default case... */
716 cmd_result
= scsi_execute(scsidev
, scsi_cmd
, DMA_NONE
, NULL
, 0,
717 sensebuf
, &sshdr
, (10*HZ
), 5, 0, 0, NULL
);
719 if (driver_byte(cmd_result
) == DRIVER_SENSE
) {/* sense data available */
720 u8
*desc
= sensebuf
+ 8;
721 cmd_result
&= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
723 /* If we set cc then ATA pass-through will cause a
724 * check condition even if no error. Filter that. */
725 if (cmd_result
& SAM_STAT_CHECK_CONDITION
) {
726 if (sshdr
.sense_key
== RECOVERED_ERROR
&&
727 sshdr
.asc
== 0 && sshdr
.ascq
== 0x1d)
728 cmd_result
&= ~SAM_STAT_CHECK_CONDITION
;
731 /* Send userspace ATA registers */
732 if (sensebuf
[0] == 0x72 && /* format is "descriptor" */
733 desc
[0] == 0x09) {/* code is "ATA Descriptor" */
734 args
[0] = desc
[13]; /* status */
735 args
[1] = desc
[3]; /* error */
736 args
[2] = desc
[5]; /* sector count (0:7) */
737 args
[3] = desc
[7]; /* lbal */
738 args
[4] = desc
[9]; /* lbam */
739 args
[5] = desc
[11]; /* lbah */
740 args
[6] = desc
[12]; /* select */
741 if (copy_to_user(arg
, args
, sizeof(args
)))
755 static int ata_ioc32(struct ata_port
*ap
)
757 if (ap
->flags
& ATA_FLAG_PIO_DMA
)
759 if (ap
->pflags
& ATA_PFLAG_PIO32
)
764 int ata_sas_scsi_ioctl(struct ata_port
*ap
, struct scsi_device
*scsidev
,
765 unsigned int cmd
, void __user
*arg
)
773 spin_lock_irqsave(ap
->lock
, flags
);
775 spin_unlock_irqrestore(ap
->lock
, flags
);
776 return put_user(val
, (unsigned long __user
*)arg
);
779 val
= (unsigned long) arg
;
781 spin_lock_irqsave(ap
->lock
, flags
);
782 if (ap
->pflags
& ATA_PFLAG_PIO32CHANGE
) {
784 ap
->pflags
|= ATA_PFLAG_PIO32
;
786 ap
->pflags
&= ~ATA_PFLAG_PIO32
;
788 if (val
!= ata_ioc32(ap
))
791 spin_unlock_irqrestore(ap
->lock
, flags
);
794 case HDIO_GET_IDENTITY
:
795 return ata_get_identity(ap
, scsidev
, arg
);
798 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
800 return ata_cmd_ioctl(scsidev
, arg
);
802 case HDIO_DRIVE_TASK
:
803 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
805 return ata_task_ioctl(scsidev
, arg
);
814 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl
);
816 int ata_scsi_ioctl(struct scsi_device
*scsidev
, unsigned int cmd
,
819 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev
->host
),
822 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
825 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
826 * @dev: ATA device to which the new command is attached
827 * @cmd: SCSI command that originated this ATA command
829 * Obtain a reference to an unused ata_queued_cmd structure,
830 * which is the basic libata structure representing a single
831 * ATA command sent to the hardware.
833 * If a command was available, fill in the SCSI-specific
834 * portions of the structure with information on the
838 * spin_lock_irqsave(host lock)
841 * Command allocated, or %NULL if none available.
843 static struct ata_queued_cmd
*ata_scsi_qc_new(struct ata_device
*dev
,
844 struct scsi_cmnd
*cmd
)
846 struct ata_queued_cmd
*qc
;
848 qc
= ata_qc_new_init(dev
, cmd
->request
->tag
);
851 qc
->scsidone
= cmd
->scsi_done
;
853 qc
->sg
= scsi_sglist(cmd
);
854 qc
->n_elem
= scsi_sg_count(cmd
);
856 if (cmd
->request
->rq_flags
& RQF_QUIET
)
857 qc
->flags
|= ATA_QCFLAG_QUIET
;
859 cmd
->result
= (DID_OK
<< 16) | (QUEUE_FULL
<< 1);
866 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd
*qc
)
868 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
870 qc
->extrabytes
= scmd
->request
->extra_len
;
871 qc
->nbytes
= scsi_bufflen(scmd
) + qc
->extrabytes
;
875 * ata_dump_status - user friendly display of error info
876 * @id: id of the port in question
877 * @tf: ptr to filled out taskfile
879 * Decode and dump the ATA error/status registers for the user so
880 * that they have some idea what really happened at the non
881 * make-believe layer.
884 * inherited from caller
886 static void ata_dump_status(unsigned id
, struct ata_taskfile
*tf
)
888 u8 stat
= tf
->command
, err
= tf
->feature
;
890 pr_warn("ata%u: status=0x%02x { ", id
, stat
);
891 if (stat
& ATA_BUSY
) {
892 pr_cont("Busy }\n"); /* Data is not valid in this case */
894 if (stat
& ATA_DRDY
) pr_cont("DriveReady ");
895 if (stat
& ATA_DF
) pr_cont("DeviceFault ");
896 if (stat
& ATA_DSC
) pr_cont("SeekComplete ");
897 if (stat
& ATA_DRQ
) pr_cont("DataRequest ");
898 if (stat
& ATA_CORR
) pr_cont("CorrectedError ");
899 if (stat
& ATA_SENSE
) pr_cont("Sense ");
900 if (stat
& ATA_ERR
) pr_cont("Error ");
904 pr_warn("ata%u: error=0x%02x { ", id
, err
);
905 if (err
& ATA_ABORTED
) pr_cont("DriveStatusError ");
906 if (err
& ATA_ICRC
) {
907 if (err
& ATA_ABORTED
)
909 else pr_cont("Sector ");
911 if (err
& ATA_UNC
) pr_cont("UncorrectableError ");
912 if (err
& ATA_IDNF
) pr_cont("SectorIdNotFound ");
913 if (err
& ATA_TRK0NF
) pr_cont("TrackZeroNotFound ");
914 if (err
& ATA_AMNF
) pr_cont("AddrMarkNotFound ");
921 * ata_to_sense_error - convert ATA error to SCSI error
922 * @id: ATA device number
923 * @drv_stat: value contained in ATA status register
924 * @drv_err: value contained in ATA error register
925 * @sk: the sense key we'll fill out
926 * @asc: the additional sense code we'll fill out
927 * @ascq: the additional sense code qualifier we'll fill out
928 * @verbose: be verbose
930 * Converts an ATA error into a SCSI error. Fill out pointers to
931 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
932 * format sense blocks.
935 * spin_lock_irqsave(host lock)
937 static void ata_to_sense_error(unsigned id
, u8 drv_stat
, u8 drv_err
, u8
*sk
,
938 u8
*asc
, u8
*ascq
, int verbose
)
942 /* Based on the 3ware driver translation table */
943 static const unsigned char sense_table
[][4] = {
945 {0xd1, ABORTED_COMMAND
, 0x00, 0x00},
946 // Device busy Aborted command
948 {0xd0, ABORTED_COMMAND
, 0x00, 0x00},
949 // Device busy Aborted command
951 {0x61, HARDWARE_ERROR
, 0x00, 0x00},
952 // Device fault Hardware error
953 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
954 {0x84, ABORTED_COMMAND
, 0x47, 0x00},
955 // Data CRC error SCSI parity error
956 /* MC|ID|ABRT|TRK0|MARK */
957 {0x37, NOT_READY
, 0x04, 0x00},
958 // Unit offline Not ready
960 {0x09, NOT_READY
, 0x04, 0x00},
961 // Unrecovered disk error Not ready
962 /* Bad address mark */
963 {0x01, MEDIUM_ERROR
, 0x13, 0x00},
964 // Address mark not found for data field
965 /* TRK0 - Track 0 not found */
966 {0x02, HARDWARE_ERROR
, 0x00, 0x00},
968 /* Abort: 0x04 is not translated here, see below */
969 /* Media change request */
970 {0x08, NOT_READY
, 0x04, 0x00},
971 // FIXME: faking offline
972 /* SRV/IDNF - ID not found */
973 {0x10, ILLEGAL_REQUEST
, 0x21, 0x00},
974 // Logical address out of range
975 /* MC - Media Changed */
976 {0x20, UNIT_ATTENTION
, 0x28, 0x00},
977 // Not ready to ready change, medium may have changed
978 /* ECC - Uncorrectable ECC error */
979 {0x40, MEDIUM_ERROR
, 0x11, 0x04},
980 // Unrecovered read error
981 /* BBD - block marked bad */
982 {0x80, MEDIUM_ERROR
, 0x11, 0x04},
983 // Block marked bad Medium error, unrecovered read error
984 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
986 static const unsigned char stat_table
[][4] = {
987 /* Must be first because BUSY means no other bits valid */
988 {0x80, ABORTED_COMMAND
, 0x47, 0x00},
989 // Busy, fake parity for now
990 {0x40, ILLEGAL_REQUEST
, 0x21, 0x04},
991 // Device ready, unaligned write command
992 {0x20, HARDWARE_ERROR
, 0x44, 0x00},
993 // Device fault, internal target failure
994 {0x08, ABORTED_COMMAND
, 0x47, 0x00},
995 // Timed out in xfer, fake parity for now
996 {0x04, RECOVERED_ERROR
, 0x11, 0x00},
997 // Recovered ECC error Medium error, recovered
998 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
1002 * Is this an error we can process/parse
1004 if (drv_stat
& ATA_BUSY
) {
1005 drv_err
= 0; /* Ignore the err bits, they're invalid */
1009 /* Look for drv_err */
1010 for (i
= 0; sense_table
[i
][0] != 0xFF; i
++) {
1011 /* Look for best matches first */
1012 if ((sense_table
[i
][0] & drv_err
) ==
1013 sense_table
[i
][0]) {
1014 *sk
= sense_table
[i
][1];
1015 *asc
= sense_table
[i
][2];
1016 *ascq
= sense_table
[i
][3];
1017 goto translate_done
;
1023 * Fall back to interpreting status bits. Note that if the drv_err
1024 * has only the ABRT bit set, we decode drv_stat. ABRT by itself
1025 * is not descriptive enough.
1027 for (i
= 0; stat_table
[i
][0] != 0xFF; i
++) {
1028 if (stat_table
[i
][0] & drv_stat
) {
1029 *sk
= stat_table
[i
][1];
1030 *asc
= stat_table
[i
][2];
1031 *ascq
= stat_table
[i
][3];
1032 goto translate_done
;
1037 * We need a sensible error return here, which is tricky, and one
1038 * that won't cause people to do things like return a disk wrongly.
1040 *sk
= ABORTED_COMMAND
;
1046 pr_err("ata%u: translated ATA stat/err 0x%02x/%02x to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
1047 id
, drv_stat
, drv_err
, *sk
, *asc
, *ascq
);
1052 * ata_gen_passthru_sense - Generate check condition sense block.
1053 * @qc: Command that completed.
1055 * This function is specific to the ATA descriptor format sense
1056 * block specified for the ATA pass through commands. Regardless
1057 * of whether the command errored or not, return a sense
1058 * block. Copy all controller registers into the sense
1059 * block. If there was no error, we get the request from an ATA
1060 * passthrough command, so we use the following sense data:
1061 * sk = RECOVERED ERROR
1062 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1068 static void ata_gen_passthru_sense(struct ata_queued_cmd
*qc
)
1070 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1071 struct ata_taskfile
*tf
= &qc
->result_tf
;
1072 unsigned char *sb
= cmd
->sense_buffer
;
1073 unsigned char *desc
= sb
+ 8;
1074 int verbose
= qc
->ap
->ops
->error_handler
== NULL
;
1075 u8 sense_key
, asc
, ascq
;
1077 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
1079 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
1082 * Use ata_to_sense_error() to map status register bits
1083 * onto sense key, asc & ascq.
1086 tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
1087 ata_to_sense_error(qc
->ap
->print_id
, tf
->command
, tf
->feature
,
1088 &sense_key
, &asc
, &ascq
, verbose
);
1089 ata_scsi_set_sense(qc
->dev
, cmd
, sense_key
, asc
, ascq
);
1092 * ATA PASS-THROUGH INFORMATION AVAILABLE
1093 * Always in descriptor format sense.
1095 scsi_build_sense_buffer(1, cmd
->sense_buffer
,
1096 RECOVERED_ERROR
, 0, 0x1D);
1099 if ((cmd
->sense_buffer
[0] & 0x7f) >= 0x72) {
1102 /* descriptor format */
1104 desc
= (char *)scsi_sense_desc_find(sb
, len
+ 8, 9);
1106 if (SCSI_SENSE_BUFFERSIZE
< len
+ 14)
1109 desc
= sb
+ 8 + len
;
1114 * Copy registers into sense buffer.
1117 desc
[3] = tf
->feature
; /* == error reg */
1118 desc
[5] = tf
->nsect
;
1121 desc
[11] = tf
->lbah
;
1122 desc
[12] = tf
->device
;
1123 desc
[13] = tf
->command
; /* == status reg */
1126 * Fill in Extend bit, and the high order bytes
1129 if (tf
->flags
& ATA_TFLAG_LBA48
) {
1131 desc
[4] = tf
->hob_nsect
;
1132 desc
[6] = tf
->hob_lbal
;
1133 desc
[8] = tf
->hob_lbam
;
1134 desc
[10] = tf
->hob_lbah
;
1137 /* Fixed sense format */
1138 desc
[0] = tf
->feature
;
1139 desc
[1] = tf
->command
; /* status */
1140 desc
[2] = tf
->device
;
1141 desc
[3] = tf
->nsect
;
1143 if (tf
->flags
& ATA_TFLAG_LBA48
) {
1147 if (tf
->hob_lbal
|| tf
->hob_lbam
|| tf
->hob_lbah
)
1151 desc
[10] = tf
->lbam
;
1152 desc
[11] = tf
->lbah
;
1157 * ata_gen_ata_sense - generate a SCSI fixed sense block
1158 * @qc: Command that we are erroring out
1160 * Generate sense block for a failed ATA command @qc. Descriptor
1161 * format is used to accommodate LBA48 block address.
1166 static void ata_gen_ata_sense(struct ata_queued_cmd
*qc
)
1168 struct ata_device
*dev
= qc
->dev
;
1169 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1170 struct ata_taskfile
*tf
= &qc
->result_tf
;
1171 unsigned char *sb
= cmd
->sense_buffer
;
1172 int verbose
= qc
->ap
->ops
->error_handler
== NULL
;
1174 u8 sense_key
, asc
, ascq
;
1176 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
1178 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
1180 if (ata_dev_disabled(dev
)) {
1181 /* Device disabled after error recovery */
1182 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */
1183 ata_scsi_set_sense(dev
, cmd
, NOT_READY
, 0x04, 0x21);
1186 /* Use ata_to_sense_error() to map status register bits
1187 * onto sense key, asc & ascq.
1190 tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
1191 ata_to_sense_error(qc
->ap
->print_id
, tf
->command
, tf
->feature
,
1192 &sense_key
, &asc
, &ascq
, verbose
);
1193 ata_scsi_set_sense(dev
, cmd
, sense_key
, asc
, ascq
);
1195 /* Could not decode error */
1196 ata_dev_warn(dev
, "could not decode error status 0x%x err_mask 0x%x\n",
1197 tf
->command
, qc
->err_mask
);
1198 ata_scsi_set_sense(dev
, cmd
, ABORTED_COMMAND
, 0, 0);
1202 block
= ata_tf_read_block(&qc
->result_tf
, dev
);
1203 if (block
== U64_MAX
)
1206 scsi_set_sense_information(sb
, SCSI_SENSE_BUFFERSIZE
, block
);
1209 static void ata_scsi_sdev_config(struct scsi_device
*sdev
)
1211 sdev
->use_10_for_rw
= 1;
1212 sdev
->use_10_for_ms
= 1;
1213 sdev
->no_write_same
= 1;
1215 /* Schedule policy is determined by ->qc_defer() callback and
1216 * it needs to see every deferred qc. Set dev_blocked to 1 to
1217 * prevent SCSI midlayer from automatically deferring
1220 sdev
->max_device_blocked
= 1;
1224 * atapi_drain_needed - Check whether data transfer may overflow
1225 * @rq: request to be checked
1227 * ATAPI commands which transfer variable length data to host
1228 * might overflow due to application error or hardware bug. This
1229 * function checks whether overflow should be drained and ignored
1236 * 1 if ; otherwise, 0.
1238 static int atapi_drain_needed(struct request
*rq
)
1240 if (likely(!blk_rq_is_passthrough(rq
)))
1243 if (!blk_rq_bytes(rq
) || op_is_write(req_op(rq
)))
1246 return atapi_cmd_type(scsi_req(rq
)->cmd
[0]) == ATAPI_MISC
;
1249 static int ata_scsi_dev_config(struct scsi_device
*sdev
,
1250 struct ata_device
*dev
)
1252 struct request_queue
*q
= sdev
->request_queue
;
1254 if (!ata_id_has_unload(dev
->id
))
1255 dev
->flags
|= ATA_DFLAG_NO_UNLOAD
;
1257 /* configure max sectors */
1258 blk_queue_max_hw_sectors(q
, dev
->max_sectors
);
1260 if (dev
->class == ATA_DEV_ATAPI
) {
1263 sdev
->sector_size
= ATA_SECT_SIZE
;
1265 /* set DMA padding */
1266 blk_queue_update_dma_pad(q
, ATA_DMA_PAD_SZ
- 1);
1268 /* configure draining */
1269 buf
= kmalloc(ATAPI_MAX_DRAIN
, q
->bounce_gfp
| GFP_KERNEL
);
1271 ata_dev_err(dev
, "drain buffer allocation failed\n");
1275 blk_queue_dma_drain(q
, atapi_drain_needed
, buf
, ATAPI_MAX_DRAIN
);
1277 sdev
->sector_size
= ata_id_logical_sector_size(dev
->id
);
1278 sdev
->manage_start_stop
= 1;
1282 * ata_pio_sectors() expects buffer for each sector to not cross
1283 * page boundary. Enforce it by requiring buffers to be sector
1284 * aligned, which works iff sector_size is not larger than
1285 * PAGE_SIZE. ATAPI devices also need the alignment as
1286 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1288 if (sdev
->sector_size
> PAGE_SIZE
)
1290 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1293 blk_queue_update_dma_alignment(q
, sdev
->sector_size
- 1);
1295 if (dev
->flags
& ATA_DFLAG_AN
)
1296 set_bit(SDEV_EVT_MEDIA_CHANGE
, sdev
->supported_events
);
1298 if (dev
->flags
& ATA_DFLAG_NCQ
) {
1301 depth
= min(sdev
->host
->can_queue
, ata_id_queue_depth(dev
->id
));
1302 depth
= min(ATA_MAX_QUEUE
, depth
);
1303 scsi_change_queue_depth(sdev
, depth
);
1306 if (dev
->flags
& ATA_DFLAG_TRUSTED
)
1307 sdev
->security_supported
= 1;
1314 * ata_scsi_slave_config - Set SCSI device attributes
1315 * @sdev: SCSI device to examine
1317 * This is called before we actually start reading
1318 * and writing to the device, to configure certain
1319 * SCSI mid-layer behaviors.
1322 * Defined by SCSI layer. We don't really care.
1325 int ata_scsi_slave_config(struct scsi_device
*sdev
)
1327 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1328 struct ata_device
*dev
= __ata_scsi_find_dev(ap
, sdev
);
1331 ata_scsi_sdev_config(sdev
);
1334 rc
= ata_scsi_dev_config(sdev
, dev
);
1340 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1341 * @sdev: SCSI device to be destroyed
1343 * @sdev is about to be destroyed for hot/warm unplugging. If
1344 * this unplugging was initiated by libata as indicated by NULL
1345 * dev->sdev, this function doesn't have to do anything.
1346 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1347 * Clear dev->sdev, schedule the device for ATA detach and invoke
1351 * Defined by SCSI layer. We don't really care.
1353 void ata_scsi_slave_destroy(struct scsi_device
*sdev
)
1355 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1356 struct request_queue
*q
= sdev
->request_queue
;
1357 unsigned long flags
;
1358 struct ata_device
*dev
;
1360 if (!ap
->ops
->error_handler
)
1363 spin_lock_irqsave(ap
->lock
, flags
);
1364 dev
= __ata_scsi_find_dev(ap
, sdev
);
1365 if (dev
&& dev
->sdev
) {
1366 /* SCSI device already in CANCEL state, no need to offline it */
1368 dev
->flags
|= ATA_DFLAG_DETACH
;
1369 ata_port_schedule_eh(ap
);
1371 spin_unlock_irqrestore(ap
->lock
, flags
);
1373 kfree(q
->dma_drain_buffer
);
1374 q
->dma_drain_buffer
= NULL
;
1375 q
->dma_drain_size
= 0;
1379 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth
1380 * @ap: ATA port to which the device change the queue depth
1381 * @sdev: SCSI device to configure queue depth for
1382 * @queue_depth: new queue depth
1384 * libsas and libata have different approaches for associating a sdev to
1388 int __ata_change_queue_depth(struct ata_port
*ap
, struct scsi_device
*sdev
,
1391 struct ata_device
*dev
;
1392 unsigned long flags
;
1394 if (queue_depth
< 1 || queue_depth
== sdev
->queue_depth
)
1395 return sdev
->queue_depth
;
1397 dev
= ata_scsi_find_dev(ap
, sdev
);
1398 if (!dev
|| !ata_dev_enabled(dev
))
1399 return sdev
->queue_depth
;
1402 spin_lock_irqsave(ap
->lock
, flags
);
1403 dev
->flags
&= ~ATA_DFLAG_NCQ_OFF
;
1404 if (queue_depth
== 1 || !ata_ncq_enabled(dev
)) {
1405 dev
->flags
|= ATA_DFLAG_NCQ_OFF
;
1408 spin_unlock_irqrestore(ap
->lock
, flags
);
1410 /* limit and apply queue depth */
1411 queue_depth
= min(queue_depth
, sdev
->host
->can_queue
);
1412 queue_depth
= min(queue_depth
, ata_id_queue_depth(dev
->id
));
1413 queue_depth
= min(queue_depth
, ATA_MAX_QUEUE
);
1415 if (sdev
->queue_depth
== queue_depth
)
1418 return scsi_change_queue_depth(sdev
, queue_depth
);
1422 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1423 * @sdev: SCSI device to configure queue depth for
1424 * @queue_depth: new queue depth
1426 * This is libata standard hostt->change_queue_depth callback.
1427 * SCSI will call into this callback when user tries to set queue
1431 * SCSI layer (we don't care)
1434 * Newly configured queue depth.
1436 int ata_scsi_change_queue_depth(struct scsi_device
*sdev
, int queue_depth
)
1438 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1440 return __ata_change_queue_depth(ap
, sdev
, queue_depth
);
1444 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1445 * @qc: Storage for translated ATA taskfile
1447 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1448 * (to start). Perhaps these commands should be preceded by
1449 * CHECK POWER MODE to see what power mode the device is already in.
1450 * [See SAT revision 5 at www.t10.org]
1453 * spin_lock_irqsave(host lock)
1456 * Zero on success, non-zero on error.
1458 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd
*qc
)
1460 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1461 struct ata_taskfile
*tf
= &qc
->tf
;
1462 const u8
*cdb
= scmd
->cmnd
;
1466 if (scmd
->cmd_len
< 5) {
1471 tf
->flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1472 tf
->protocol
= ATA_PROT_NODATA
;
1474 ; /* ignore IMMED bit, violates sat-r05 */
1479 goto invalid_fld
; /* LOEJ bit set not supported */
1481 if (((cdb
[4] >> 4) & 0xf) != 0) {
1484 goto invalid_fld
; /* power conditions not supported */
1488 tf
->nsect
= 1; /* 1 sector, lba=0 */
1490 if (qc
->dev
->flags
& ATA_DFLAG_LBA
) {
1491 tf
->flags
|= ATA_TFLAG_LBA
;
1496 tf
->device
|= ATA_LBA
;
1499 tf
->lbal
= 0x1; /* sect */
1500 tf
->lbam
= 0x0; /* cyl low */
1501 tf
->lbah
= 0x0; /* cyl high */
1504 tf
->command
= ATA_CMD_VERIFY
; /* READ VERIFY */
1506 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1507 * or S5) causing some drives to spin up and down again.
1509 if ((qc
->ap
->flags
& ATA_FLAG_NO_POWEROFF_SPINDOWN
) &&
1510 system_state
== SYSTEM_POWER_OFF
)
1513 if ((qc
->ap
->flags
& ATA_FLAG_NO_HIBERNATE_SPINDOWN
) &&
1514 system_entering_hibernation())
1517 /* Issue ATA STANDBY IMMEDIATE command */
1518 tf
->command
= ATA_CMD_STANDBYNOW1
;
1522 * Standby and Idle condition timers could be implemented but that
1523 * would require libata to implement the Power condition mode page
1524 * and allow the user to change it. Changing mode pages requires
1525 * MODE SELECT to be implemented.
1531 ata_scsi_set_invalid_field(qc
->dev
, scmd
, fp
, bp
);
1534 scmd
->result
= SAM_STAT_GOOD
;
1540 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1541 * @qc: Storage for translated ATA taskfile
1543 * Sets up an ATA taskfile to issue FLUSH CACHE or
1547 * spin_lock_irqsave(host lock)
1550 * Zero on success, non-zero on error.
1552 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd
*qc
)
1554 struct ata_taskfile
*tf
= &qc
->tf
;
1556 tf
->flags
|= ATA_TFLAG_DEVICE
;
1557 tf
->protocol
= ATA_PROT_NODATA
;
1559 if (qc
->dev
->flags
& ATA_DFLAG_FLUSH_EXT
)
1560 tf
->command
= ATA_CMD_FLUSH_EXT
;
1562 tf
->command
= ATA_CMD_FLUSH
;
1564 /* flush is critical for IO integrity, consider it an IO command */
1565 qc
->flags
|= ATA_QCFLAG_IO
;
1571 * scsi_6_lba_len - Get LBA and transfer length
1572 * @cdb: SCSI command to translate
1574 * Calculate LBA and transfer length for 6-byte commands.
1578 * @plen: the transfer length
1580 static void scsi_6_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1585 VPRINTK("six-byte command\n");
1587 lba
|= ((u64
)(cdb
[1] & 0x1f)) << 16;
1588 lba
|= ((u64
)cdb
[2]) << 8;
1589 lba
|= ((u64
)cdb
[3]);
1598 * scsi_10_lba_len - Get LBA and transfer length
1599 * @cdb: SCSI command to translate
1601 * Calculate LBA and transfer length for 10-byte commands.
1605 * @plen: the transfer length
1607 static void scsi_10_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1612 VPRINTK("ten-byte command\n");
1614 lba
|= ((u64
)cdb
[2]) << 24;
1615 lba
|= ((u64
)cdb
[3]) << 16;
1616 lba
|= ((u64
)cdb
[4]) << 8;
1617 lba
|= ((u64
)cdb
[5]);
1619 len
|= ((u32
)cdb
[7]) << 8;
1620 len
|= ((u32
)cdb
[8]);
1627 * scsi_16_lba_len - Get LBA and transfer length
1628 * @cdb: SCSI command to translate
1630 * Calculate LBA and transfer length for 16-byte commands.
1634 * @plen: the transfer length
1636 static void scsi_16_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1641 VPRINTK("sixteen-byte command\n");
1643 lba
|= ((u64
)cdb
[2]) << 56;
1644 lba
|= ((u64
)cdb
[3]) << 48;
1645 lba
|= ((u64
)cdb
[4]) << 40;
1646 lba
|= ((u64
)cdb
[5]) << 32;
1647 lba
|= ((u64
)cdb
[6]) << 24;
1648 lba
|= ((u64
)cdb
[7]) << 16;
1649 lba
|= ((u64
)cdb
[8]) << 8;
1650 lba
|= ((u64
)cdb
[9]);
1652 len
|= ((u32
)cdb
[10]) << 24;
1653 len
|= ((u32
)cdb
[11]) << 16;
1654 len
|= ((u32
)cdb
[12]) << 8;
1655 len
|= ((u32
)cdb
[13]);
1662 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1663 * @qc: Storage for translated ATA taskfile
1665 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1668 * spin_lock_irqsave(host lock)
1671 * Zero on success, non-zero on error.
1673 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd
*qc
)
1675 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1676 struct ata_taskfile
*tf
= &qc
->tf
;
1677 struct ata_device
*dev
= qc
->dev
;
1678 u64 dev_sectors
= qc
->dev
->n_sectors
;
1679 const u8
*cdb
= scmd
->cmnd
;
1684 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1685 tf
->protocol
= ATA_PROT_NODATA
;
1687 if (cdb
[0] == VERIFY
) {
1688 if (scmd
->cmd_len
< 10) {
1692 scsi_10_lba_len(cdb
, &block
, &n_block
);
1693 } else if (cdb
[0] == VERIFY_16
) {
1694 if (scmd
->cmd_len
< 16) {
1698 scsi_16_lba_len(cdb
, &block
, &n_block
);
1706 if (block
>= dev_sectors
)
1708 if ((block
+ n_block
) > dev_sectors
)
1711 if (dev
->flags
& ATA_DFLAG_LBA
) {
1712 tf
->flags
|= ATA_TFLAG_LBA
;
1714 if (lba_28_ok(block
, n_block
)) {
1716 tf
->command
= ATA_CMD_VERIFY
;
1717 tf
->device
|= (block
>> 24) & 0xf;
1718 } else if (lba_48_ok(block
, n_block
)) {
1719 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
1723 tf
->flags
|= ATA_TFLAG_LBA48
;
1724 tf
->command
= ATA_CMD_VERIFY_EXT
;
1726 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
1728 tf
->hob_lbah
= (block
>> 40) & 0xff;
1729 tf
->hob_lbam
= (block
>> 32) & 0xff;
1730 tf
->hob_lbal
= (block
>> 24) & 0xff;
1732 /* request too large even for LBA48 */
1735 tf
->nsect
= n_block
& 0xff;
1737 tf
->lbah
= (block
>> 16) & 0xff;
1738 tf
->lbam
= (block
>> 8) & 0xff;
1739 tf
->lbal
= block
& 0xff;
1741 tf
->device
|= ATA_LBA
;
1744 u32 sect
, head
, cyl
, track
;
1746 if (!lba_28_ok(block
, n_block
))
1749 /* Convert LBA to CHS */
1750 track
= (u32
)block
/ dev
->sectors
;
1751 cyl
= track
/ dev
->heads
;
1752 head
= track
% dev
->heads
;
1753 sect
= (u32
)block
% dev
->sectors
+ 1;
1755 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1756 (u32
)block
, track
, cyl
, head
, sect
);
1758 /* Check whether the converted CHS can fit.
1762 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
1765 tf
->command
= ATA_CMD_VERIFY
;
1766 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
1769 tf
->lbah
= cyl
>> 8;
1776 ata_scsi_set_invalid_field(qc
->dev
, scmd
, fp
, 0xff);
1780 ata_scsi_set_sense(qc
->dev
, scmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1781 /* "Logical Block Address out of range" */
1785 scmd
->result
= SAM_STAT_GOOD
;
1790 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1791 * @qc: Storage for translated ATA taskfile
1793 * Converts any of six SCSI read/write commands into the
1794 * ATA counterpart, including starting sector (LBA),
1795 * sector count, and taking into account the device's LBA48
1798 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1799 * %WRITE_16 are currently supported.
1802 * spin_lock_irqsave(host lock)
1805 * Zero on success, non-zero on error.
1807 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd
*qc
)
1809 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1810 const u8
*cdb
= scmd
->cmnd
;
1811 struct request
*rq
= scmd
->request
;
1812 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq
));
1813 unsigned int tf_flags
= 0;
1819 if (cdb
[0] == WRITE_10
|| cdb
[0] == WRITE_6
|| cdb
[0] == WRITE_16
)
1820 tf_flags
|= ATA_TFLAG_WRITE
;
1822 /* Calculate the SCSI LBA, transfer length and FUA. */
1826 if (unlikely(scmd
->cmd_len
< 10)) {
1830 scsi_10_lba_len(cdb
, &block
, &n_block
);
1831 if (cdb
[1] & (1 << 3))
1832 tf_flags
|= ATA_TFLAG_FUA
;
1836 if (unlikely(scmd
->cmd_len
< 6)) {
1840 scsi_6_lba_len(cdb
, &block
, &n_block
);
1842 /* for 6-byte r/w commands, transfer length 0
1843 * means 256 blocks of data, not 0 block.
1850 if (unlikely(scmd
->cmd_len
< 16)) {
1854 scsi_16_lba_len(cdb
, &block
, &n_block
);
1855 if (cdb
[1] & (1 << 3))
1856 tf_flags
|= ATA_TFLAG_FUA
;
1859 DPRINTK("no-byte command\n");
1864 /* Check and compose ATA command */
1866 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1867 * length 0 means transfer 0 block of data.
1868 * However, for ATA R/W commands, sector count 0 means
1869 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1871 * WARNING: one or two older ATA drives treat 0 as 0...
1875 qc
->flags
|= ATA_QCFLAG_IO
;
1876 qc
->nbytes
= n_block
* scmd
->device
->sector_size
;
1878 rc
= ata_build_rw_tf(&qc
->tf
, qc
->dev
, block
, n_block
, tf_flags
,
1881 if (likely(rc
== 0))
1886 /* treat all other errors as -EINVAL, fall through */
1888 ata_scsi_set_invalid_field(qc
->dev
, scmd
, fp
, 0xff);
1892 ata_scsi_set_sense(qc
->dev
, scmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1893 /* "Logical Block Address out of range" */
1897 scmd
->result
= SAM_STAT_GOOD
;
1901 static void ata_qc_done(struct ata_queued_cmd
*qc
)
1903 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1904 void (*done
)(struct scsi_cmnd
*) = qc
->scsidone
;
1910 static void ata_scsi_qc_complete(struct ata_queued_cmd
*qc
)
1912 struct ata_port
*ap
= qc
->ap
;
1913 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1914 u8
*cdb
= cmd
->cmnd
;
1915 int need_sense
= (qc
->err_mask
!= 0);
1917 /* For ATA pass thru (SAT) commands, generate a sense block if
1918 * user mandated it or if there's an error. Note that if we
1919 * generate because the user forced us to [CK_COND =1], a check
1920 * condition is generated and the ATA register values are returned
1921 * whether the command completed successfully or not. If there
1922 * was no error, we use the following sense data:
1923 * sk = RECOVERED ERROR
1924 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1926 if (((cdb
[0] == ATA_16
) || (cdb
[0] == ATA_12
)) &&
1927 ((cdb
[2] & 0x20) || need_sense
))
1928 ata_gen_passthru_sense(qc
);
1929 else if (qc
->flags
& ATA_QCFLAG_SENSE_VALID
)
1930 cmd
->result
= SAM_STAT_CHECK_CONDITION
;
1931 else if (need_sense
)
1932 ata_gen_ata_sense(qc
);
1934 cmd
->result
= SAM_STAT_GOOD
;
1936 if (need_sense
&& !ap
->ops
->error_handler
)
1937 ata_dump_status(ap
->print_id
, &qc
->result_tf
);
1943 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1944 * @dev: ATA device to which the command is addressed
1945 * @cmd: SCSI command to execute
1946 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1948 * Our ->queuecommand() function has decided that the SCSI
1949 * command issued can be directly translated into an ATA
1950 * command, rather than handled internally.
1952 * This function sets up an ata_queued_cmd structure for the
1953 * SCSI command, and sends that ata_queued_cmd to the hardware.
1955 * The xlat_func argument (actor) returns 0 if ready to execute
1956 * ATA command, else 1 to finish translation. If 1 is returned
1957 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1958 * to be set reflecting an error condition or clean (early)
1962 * spin_lock_irqsave(host lock)
1965 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1966 * needs to be deferred.
1968 static int ata_scsi_translate(struct ata_device
*dev
, struct scsi_cmnd
*cmd
,
1969 ata_xlat_func_t xlat_func
)
1971 struct ata_port
*ap
= dev
->link
->ap
;
1972 struct ata_queued_cmd
*qc
;
1977 qc
= ata_scsi_qc_new(dev
, cmd
);
1981 /* data is present; dma-map it */
1982 if (cmd
->sc_data_direction
== DMA_FROM_DEVICE
||
1983 cmd
->sc_data_direction
== DMA_TO_DEVICE
) {
1984 if (unlikely(scsi_bufflen(cmd
) < 1)) {
1985 ata_dev_warn(dev
, "WARNING: zero len r/w req\n");
1989 ata_sg_init(qc
, scsi_sglist(cmd
), scsi_sg_count(cmd
));
1991 qc
->dma_dir
= cmd
->sc_data_direction
;
1994 qc
->complete_fn
= ata_scsi_qc_complete
;
1999 if (ap
->ops
->qc_defer
) {
2000 if ((rc
= ap
->ops
->qc_defer(qc
)))
2004 /* select device, send command to hardware */
2012 cmd
->scsi_done(cmd
);
2013 DPRINTK("EXIT - early finish (good or error)\n");
2018 cmd
->result
= (DID_ERROR
<< 16);
2019 cmd
->scsi_done(cmd
);
2021 DPRINTK("EXIT - internal\n");
2026 DPRINTK("EXIT - defer\n");
2027 if (rc
== ATA_DEFER_LINK
)
2028 return SCSI_MLQUEUE_DEVICE_BUSY
;
2030 return SCSI_MLQUEUE_HOST_BUSY
;
2033 struct ata_scsi_args
{
2034 struct ata_device
*dev
;
2036 struct scsi_cmnd
*cmd
;
2040 * ata_scsi_rbuf_get - Map response buffer.
2041 * @cmd: SCSI command containing buffer to be mapped.
2042 * @flags: unsigned long variable to store irq enable status
2043 * @copy_in: copy in from user buffer
2045 * Prepare buffer for simulated SCSI commands.
2048 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
2051 * Pointer to response buffer.
2053 static void *ata_scsi_rbuf_get(struct scsi_cmnd
*cmd
, bool copy_in
,
2054 unsigned long *flags
)
2056 spin_lock_irqsave(&ata_scsi_rbuf_lock
, *flags
);
2058 memset(ata_scsi_rbuf
, 0, ATA_SCSI_RBUF_SIZE
);
2060 sg_copy_to_buffer(scsi_sglist(cmd
), scsi_sg_count(cmd
),
2061 ata_scsi_rbuf
, ATA_SCSI_RBUF_SIZE
);
2062 return ata_scsi_rbuf
;
2066 * ata_scsi_rbuf_put - Unmap response buffer.
2067 * @cmd: SCSI command containing buffer to be unmapped.
2068 * @copy_out: copy out result
2069 * @flags: @flags passed to ata_scsi_rbuf_get()
2071 * Returns rbuf buffer. The result is copied to @cmd's buffer if
2072 * @copy_back is true.
2075 * Unlocks ata_scsi_rbuf_lock.
2077 static inline void ata_scsi_rbuf_put(struct scsi_cmnd
*cmd
, bool copy_out
,
2078 unsigned long *flags
)
2081 sg_copy_from_buffer(scsi_sglist(cmd
), scsi_sg_count(cmd
),
2082 ata_scsi_rbuf
, ATA_SCSI_RBUF_SIZE
);
2083 spin_unlock_irqrestore(&ata_scsi_rbuf_lock
, *flags
);
2087 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
2088 * @args: device IDENTIFY data / SCSI command of interest.
2089 * @actor: Callback hook for desired SCSI command simulator
2091 * Takes care of the hard work of simulating a SCSI command...
2092 * Mapping the response buffer, calling the command's handler,
2093 * and handling the handler's return value. This return value
2094 * indicates whether the handler wishes the SCSI command to be
2095 * completed successfully (0), or not (in which case cmd->result
2096 * and sense buffer are assumed to be set).
2099 * spin_lock_irqsave(host lock)
2101 static void ata_scsi_rbuf_fill(struct ata_scsi_args
*args
,
2102 unsigned int (*actor
)(struct ata_scsi_args
*args
, u8
*rbuf
))
2106 struct scsi_cmnd
*cmd
= args
->cmd
;
2107 unsigned long flags
;
2109 rbuf
= ata_scsi_rbuf_get(cmd
, false, &flags
);
2110 rc
= actor(args
, rbuf
);
2111 ata_scsi_rbuf_put(cmd
, rc
== 0, &flags
);
2114 cmd
->result
= SAM_STAT_GOOD
;
2118 * ata_scsiop_inq_std - Simulate INQUIRY command
2119 * @args: device IDENTIFY data / SCSI command of interest.
2120 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2122 * Returns standard device identification data associated
2123 * with non-VPD INQUIRY command output.
2126 * spin_lock_irqsave(host lock)
2128 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args
*args
, u8
*rbuf
)
2130 static const u8 versions
[] = {
2132 0x60, /* SAM-3 (no version claimed) */
2135 0x20, /* SBC-2 (no version claimed) */
2138 0x00 /* SPC-3 (no version claimed) */
2140 static const u8 versions_zbc
[] = {
2142 0xA0, /* SAM-5 (no version claimed) */
2145 0x00, /* SBC-4 (no version claimed) */
2148 0xC0, /* SPC-5 (no version claimed) */
2157 0x5, /* claim SPC-3 version compatibility */
2167 /* set scsi removable (RMB) bit per ata bit, or if the
2168 * AHCI port says it's external (Hotplug-capable, eSATA).
2170 if (ata_id_removable(args
->id
) ||
2171 (args
->dev
->link
->ap
->pflags
& ATA_PFLAG_EXTERNAL
))
2174 if (args
->dev
->class == ATA_DEV_ZAC
) {
2176 hdr
[2] = 0x7; /* claim SPC-5 version compatibility */
2179 memcpy(rbuf
, hdr
, sizeof(hdr
));
2180 memcpy(&rbuf
[8], "ATA ", 8);
2181 ata_id_string(args
->id
, &rbuf
[16], ATA_ID_PROD
, 16);
2183 /* From SAT, use last 2 words from fw rev unless they are spaces */
2184 ata_id_string(args
->id
, &rbuf
[32], ATA_ID_FW_REV
+ 2, 4);
2185 if (strncmp(&rbuf
[32], " ", 4) == 0)
2186 ata_id_string(args
->id
, &rbuf
[32], ATA_ID_FW_REV
, 4);
2188 if (rbuf
[32] == 0 || rbuf
[32] == ' ')
2189 memcpy(&rbuf
[32], "n/a ", 4);
2191 if (ata_id_zoned_cap(args
->id
) || args
->dev
->class == ATA_DEV_ZAC
)
2192 memcpy(rbuf
+ 58, versions_zbc
, sizeof(versions_zbc
));
2194 memcpy(rbuf
+ 58, versions
, sizeof(versions
));
2200 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
2201 * @args: device IDENTIFY data / SCSI command of interest.
2202 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2204 * Returns list of inquiry VPD pages available.
2207 * spin_lock_irqsave(host lock)
2209 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args
*args
, u8
*rbuf
)
2212 static const u8 pages
[] = {
2213 0x00, /* page 0x00, this page */
2214 0x80, /* page 0x80, unit serial no page */
2215 0x83, /* page 0x83, device ident page */
2216 0x89, /* page 0x89, ata info page */
2217 0xb0, /* page 0xb0, block limits page */
2218 0xb1, /* page 0xb1, block device characteristics page */
2219 0xb2, /* page 0xb2, thin provisioning page */
2220 0xb6, /* page 0xb6, zoned block device characteristics */
2223 num_pages
= sizeof(pages
);
2224 if (!(args
->dev
->flags
& ATA_DFLAG_ZAC
))
2226 rbuf
[3] = num_pages
; /* number of supported VPD pages */
2227 memcpy(rbuf
+ 4, pages
, num_pages
);
2232 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
2233 * @args: device IDENTIFY data / SCSI command of interest.
2234 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2236 * Returns ATA device serial number.
2239 * spin_lock_irqsave(host lock)
2241 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args
*args
, u8
*rbuf
)
2243 static const u8 hdr
[] = {
2245 0x80, /* this page code */
2247 ATA_ID_SERNO_LEN
, /* page len */
2250 memcpy(rbuf
, hdr
, sizeof(hdr
));
2251 ata_id_string(args
->id
, (unsigned char *) &rbuf
[4],
2252 ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
2257 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
2258 * @args: device IDENTIFY data / SCSI command of interest.
2259 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2261 * Yields two logical unit device identification designators:
2262 * - vendor specific ASCII containing the ATA serial number
2263 * - SAT defined "t10 vendor id based" containing ASCII vendor
2264 * name ("ATA "), model and serial numbers.
2267 * spin_lock_irqsave(host lock)
2269 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args
*args
, u8
*rbuf
)
2271 const int sat_model_serial_desc_len
= 68;
2274 rbuf
[1] = 0x83; /* this page code */
2277 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2279 rbuf
[num
+ 3] = ATA_ID_SERNO_LEN
;
2281 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
,
2282 ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
2283 num
+= ATA_ID_SERNO_LEN
;
2285 /* SAT defined lu model and serial numbers descriptor */
2286 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2289 rbuf
[num
+ 3] = sat_model_serial_desc_len
;
2291 memcpy(rbuf
+ num
, "ATA ", 8);
2293 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
, ATA_ID_PROD
,
2295 num
+= ATA_ID_PROD_LEN
;
2296 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
, ATA_ID_SERNO
,
2298 num
+= ATA_ID_SERNO_LEN
;
2300 if (ata_id_has_wwn(args
->id
)) {
2301 /* SAT defined lu world wide name */
2302 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
2305 rbuf
[num
+ 3] = ATA_ID_WWN_LEN
;
2307 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
,
2308 ATA_ID_WWN
, ATA_ID_WWN_LEN
);
2309 num
+= ATA_ID_WWN_LEN
;
2311 rbuf
[3] = num
- 4; /* page len (assume less than 256 bytes) */
2316 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2317 * @args: device IDENTIFY data / SCSI command of interest.
2318 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2320 * Yields SAT-specified ATA VPD page.
2323 * spin_lock_irqsave(host lock)
2325 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args
*args
, u8
*rbuf
)
2327 struct ata_taskfile tf
;
2329 memset(&tf
, 0, sizeof(tf
));
2331 rbuf
[1] = 0x89; /* our page code */
2332 rbuf
[2] = (0x238 >> 8); /* page size fixed at 238h */
2333 rbuf
[3] = (0x238 & 0xff);
2335 memcpy(&rbuf
[8], "linux ", 8);
2336 memcpy(&rbuf
[16], "libata ", 16);
2337 memcpy(&rbuf
[32], DRV_VERSION
, 4);
2339 /* we don't store the ATA device signature, so we fake it */
2341 tf
.command
= ATA_DRDY
; /* really, this is Status reg */
2345 ata_tf_to_fis(&tf
, 0, 1, &rbuf
[36]); /* TODO: PMP? */
2346 rbuf
[36] = 0x34; /* force D2H Reg FIS (34h) */
2348 rbuf
[56] = ATA_CMD_ID_ATA
;
2350 memcpy(&rbuf
[60], &args
->id
[0], 512);
2354 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args
*args
, u8
*rbuf
)
2359 rbuf
[3] = 0x3c; /* required VPD size with unmap support */
2362 * Optimal transfer length granularity.
2364 * This is always one physical block, but for disks with a smaller
2365 * logical than physical sector size we need to figure out what the
2368 min_io_sectors
= 1 << ata_id_log2_per_physical_sector(args
->id
);
2369 put_unaligned_be16(min_io_sectors
, &rbuf
[6]);
2372 * Optimal unmap granularity.
2374 * The ATA spec doesn't even know about a granularity or alignment
2375 * for the TRIM command. We can leave away most of the unmap related
2376 * VPD page entries, but we have specifify a granularity to signal
2377 * that we support some form of unmap - in thise case via WRITE SAME
2378 * with the unmap bit set.
2380 if (ata_id_has_trim(args
->id
)) {
2381 put_unaligned_be64(65535 * ATA_MAX_TRIM_RNUM
, &rbuf
[36]);
2382 put_unaligned_be32(1, &rbuf
[28]);
2388 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args
*args
, u8
*rbuf
)
2390 int form_factor
= ata_id_form_factor(args
->id
);
2391 int media_rotation_rate
= ata_id_rotation_rate(args
->id
);
2392 u8 zoned
= ata_id_zoned_cap(args
->id
);
2396 rbuf
[4] = media_rotation_rate
>> 8;
2397 rbuf
[5] = media_rotation_rate
;
2398 rbuf
[7] = form_factor
;
2400 rbuf
[8] = (zoned
<< 4);
2405 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args
*args
, u8
*rbuf
)
2407 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2410 rbuf
[5] = 1 << 6; /* TPWS */
2415 static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args
*args
, u8
*rbuf
)
2418 * zbc-r05 SCSI Zoned Block device characteristics VPD page
2424 * URSWRZ bit is only meaningful for host-managed ZAC drives
2426 if (args
->dev
->zac_zoned_cap
& 1)
2428 put_unaligned_be32(args
->dev
->zac_zones_optimal_open
, &rbuf
[8]);
2429 put_unaligned_be32(args
->dev
->zac_zones_optimal_nonseq
, &rbuf
[12]);
2430 put_unaligned_be32(args
->dev
->zac_zones_max_open
, &rbuf
[16]);
2436 * modecpy - Prepare response for MODE SENSE
2437 * @dest: output buffer
2438 * @src: data being copied
2439 * @n: length of mode page
2440 * @changeable: whether changeable parameters are requested
2442 * Generate a generic MODE SENSE page for either current or changeable
2448 static void modecpy(u8
*dest
, const u8
*src
, int n
, bool changeable
)
2451 memcpy(dest
, src
, 2);
2452 memset(dest
+ 2, 0, n
- 2);
2454 memcpy(dest
, src
, n
);
2459 * ata_msense_caching - Simulate MODE SENSE caching info page
2460 * @id: device IDENTIFY data
2461 * @buf: output buffer
2462 * @changeable: whether changeable parameters are requested
2464 * Generate a caching info page, which conditionally indicates
2465 * write caching to the SCSI layer, depending on device
2471 static unsigned int ata_msense_caching(u16
*id
, u8
*buf
, bool changeable
)
2473 modecpy(buf
, def_cache_mpage
, sizeof(def_cache_mpage
), changeable
);
2475 buf
[2] |= (1 << 2); /* ata_mselect_caching() */
2477 buf
[2] |= (ata_id_wcache_enabled(id
) << 2); /* write cache enable */
2478 buf
[12] |= (!ata_id_rahead_enabled(id
) << 5); /* disable read ahead */
2480 return sizeof(def_cache_mpage
);
2484 * ata_msense_control - Simulate MODE SENSE control mode page
2485 * @dev: ATA device of interest
2486 * @buf: output buffer
2487 * @changeable: whether changeable parameters are requested
2489 * Generate a generic MODE SENSE control mode page.
2494 static unsigned int ata_msense_control(struct ata_device
*dev
, u8
*buf
,
2497 modecpy(buf
, def_control_mpage
, sizeof(def_control_mpage
), changeable
);
2499 buf
[2] |= (1 << 2); /* ata_mselect_control() */
2501 bool d_sense
= (dev
->flags
& ATA_DFLAG_D_SENSE
);
2503 buf
[2] |= (d_sense
<< 2); /* descriptor format sense data */
2505 return sizeof(def_control_mpage
);
2509 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2510 * @buf: output buffer
2511 * @changeable: whether changeable parameters are requested
2513 * Generate a generic MODE SENSE r/w error recovery page.
2518 static unsigned int ata_msense_rw_recovery(u8
*buf
, bool changeable
)
2520 modecpy(buf
, def_rw_recovery_mpage
, sizeof(def_rw_recovery_mpage
),
2522 return sizeof(def_rw_recovery_mpage
);
2526 * We can turn this into a real blacklist if it's needed, for now just
2527 * blacklist any Maxtor BANC1G10 revision firmware
2529 static int ata_dev_supports_fua(u16
*id
)
2531 unsigned char model
[ATA_ID_PROD_LEN
+ 1], fw
[ATA_ID_FW_REV_LEN
+ 1];
2535 if (!ata_id_has_fua(id
))
2538 ata_id_c_string(id
, model
, ATA_ID_PROD
, sizeof(model
));
2539 ata_id_c_string(id
, fw
, ATA_ID_FW_REV
, sizeof(fw
));
2541 if (strcmp(model
, "Maxtor"))
2543 if (strcmp(fw
, "BANC1G10"))
2546 return 0; /* blacklisted */
2550 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2551 * @args: device IDENTIFY data / SCSI command of interest.
2552 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2554 * Simulate MODE SENSE commands. Assume this is invoked for direct
2555 * access devices (e.g. disks) only. There should be no block
2556 * descriptor for other device types.
2559 * spin_lock_irqsave(host lock)
2561 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args
*args
, u8
*rbuf
)
2563 struct ata_device
*dev
= args
->dev
;
2564 u8
*scsicmd
= args
->cmd
->cmnd
, *p
= rbuf
;
2565 static const u8 sat_blk_desc
[] = {
2566 0, 0, 0, 0, /* number of blocks: sat unspecified */
2568 0, 0x2, 0x0 /* block length: 512 bytes */
2571 unsigned int ebd
, page_control
, six_byte
;
2572 u8 dpofua
, bp
= 0xff;
2577 six_byte
= (scsicmd
[0] == MODE_SENSE
);
2578 ebd
= !(scsicmd
[1] & 0x8); /* dbd bit inverted == edb */
2580 * LLBA bit in msense(10) ignored (compliant)
2583 page_control
= scsicmd
[2] >> 6;
2584 switch (page_control
) {
2585 case 0: /* current */
2586 case 1: /* changeable */
2587 case 2: /* defaults */
2588 break; /* supported */
2590 goto saving_not_supp
;
2598 p
+= 4 + (ebd
? 8 : 0);
2600 p
+= 8 + (ebd
? 8 : 0);
2602 pg
= scsicmd
[2] & 0x3f;
2605 * No mode subpages supported (yet) but asking for _all_
2606 * subpages may be valid
2608 if (spg
&& (spg
!= ALL_SUB_MPAGES
)) {
2614 case RW_RECOVERY_MPAGE
:
2615 p
+= ata_msense_rw_recovery(p
, page_control
== 1);
2619 p
+= ata_msense_caching(args
->id
, p
, page_control
== 1);
2623 p
+= ata_msense_control(args
->dev
, p
, page_control
== 1);
2627 p
+= ata_msense_rw_recovery(p
, page_control
== 1);
2628 p
+= ata_msense_caching(args
->id
, p
, page_control
== 1);
2629 p
+= ata_msense_control(args
->dev
, p
, page_control
== 1);
2632 default: /* invalid page code */
2638 if (ata_dev_supports_fua(args
->id
) && (dev
->flags
& ATA_DFLAG_LBA48
) &&
2639 (!(dev
->flags
& ATA_DFLAG_PIO
) || dev
->multi_count
))
2643 rbuf
[0] = p
- rbuf
- 1;
2646 rbuf
[3] = sizeof(sat_blk_desc
);
2647 memcpy(rbuf
+ 4, sat_blk_desc
, sizeof(sat_blk_desc
));
2650 unsigned int output_len
= p
- rbuf
- 2;
2652 rbuf
[0] = output_len
>> 8;
2653 rbuf
[1] = output_len
;
2656 rbuf
[7] = sizeof(sat_blk_desc
);
2657 memcpy(rbuf
+ 8, sat_blk_desc
, sizeof(sat_blk_desc
));
2663 ata_scsi_set_invalid_field(dev
, args
->cmd
, fp
, bp
);
2667 ata_scsi_set_sense(dev
, args
->cmd
, ILLEGAL_REQUEST
, 0x39, 0x0);
2668 /* "Saving parameters not supported" */
2673 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2674 * @args: device IDENTIFY data / SCSI command of interest.
2675 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2677 * Simulate READ CAPACITY commands.
2682 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args
*args
, u8
*rbuf
)
2684 struct ata_device
*dev
= args
->dev
;
2685 u64 last_lba
= dev
->n_sectors
- 1; /* LBA of the last block */
2686 u32 sector_size
; /* physical sector size in bytes */
2690 sector_size
= ata_id_logical_sector_size(dev
->id
);
2691 log2_per_phys
= ata_id_log2_per_physical_sector(dev
->id
);
2692 lowest_aligned
= ata_id_logical_sector_offset(dev
->id
, log2_per_phys
);
2696 if (args
->cmd
->cmnd
[0] == READ_CAPACITY
) {
2697 if (last_lba
>= 0xffffffffULL
)
2698 last_lba
= 0xffffffff;
2700 /* sector count, 32-bit */
2701 rbuf
[0] = last_lba
>> (8 * 3);
2702 rbuf
[1] = last_lba
>> (8 * 2);
2703 rbuf
[2] = last_lba
>> (8 * 1);
2707 rbuf
[4] = sector_size
>> (8 * 3);
2708 rbuf
[5] = sector_size
>> (8 * 2);
2709 rbuf
[6] = sector_size
>> (8 * 1);
2710 rbuf
[7] = sector_size
;
2712 /* sector count, 64-bit */
2713 rbuf
[0] = last_lba
>> (8 * 7);
2714 rbuf
[1] = last_lba
>> (8 * 6);
2715 rbuf
[2] = last_lba
>> (8 * 5);
2716 rbuf
[3] = last_lba
>> (8 * 4);
2717 rbuf
[4] = last_lba
>> (8 * 3);
2718 rbuf
[5] = last_lba
>> (8 * 2);
2719 rbuf
[6] = last_lba
>> (8 * 1);
2723 rbuf
[ 8] = sector_size
>> (8 * 3);
2724 rbuf
[ 9] = sector_size
>> (8 * 2);
2725 rbuf
[10] = sector_size
>> (8 * 1);
2726 rbuf
[11] = sector_size
;
2729 rbuf
[13] = log2_per_phys
;
2730 rbuf
[14] = (lowest_aligned
>> 8) & 0x3f;
2731 rbuf
[15] = lowest_aligned
;
2733 if (ata_id_has_trim(args
->id
) &&
2734 !(dev
->horkage
& ATA_HORKAGE_NOTRIM
)) {
2735 rbuf
[14] |= 0x80; /* LBPME */
2737 if (ata_id_has_zero_after_trim(args
->id
) &&
2738 dev
->horkage
& ATA_HORKAGE_ZERO_AFTER_TRIM
) {
2739 ata_dev_info(dev
, "Enabling discard_zeroes_data\n");
2740 rbuf
[14] |= 0x40; /* LBPRZ */
2743 if (ata_id_zoned_cap(args
->id
) ||
2744 args
->dev
->class == ATA_DEV_ZAC
)
2745 rbuf
[12] = (1 << 4); /* RC_BASIS */
2751 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2752 * @args: device IDENTIFY data / SCSI command of interest.
2753 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2755 * Simulate REPORT LUNS command.
2758 * spin_lock_irqsave(host lock)
2760 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args
*args
, u8
*rbuf
)
2763 rbuf
[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2768 static void atapi_sense_complete(struct ata_queued_cmd
*qc
)
2770 if (qc
->err_mask
&& ((qc
->err_mask
& AC_ERR_DEV
) == 0)) {
2771 /* FIXME: not quite right; we don't want the
2772 * translation of taskfile registers into
2773 * a sense descriptors, since that's only
2774 * correct for ATA, not ATAPI
2776 ata_gen_passthru_sense(qc
);
2782 /* is it pointless to prefer PIO for "safety reasons"? */
2783 static inline int ata_pio_use_silly(struct ata_port
*ap
)
2785 return (ap
->flags
& ATA_FLAG_PIO_DMA
);
2788 static void atapi_request_sense(struct ata_queued_cmd
*qc
)
2790 struct ata_port
*ap
= qc
->ap
;
2791 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2793 DPRINTK("ATAPI request sense\n");
2795 memset(cmd
->sense_buffer
, 0, SCSI_SENSE_BUFFERSIZE
);
2797 #ifdef CONFIG_ATA_SFF
2798 if (ap
->ops
->sff_tf_read
)
2799 ap
->ops
->sff_tf_read(ap
, &qc
->tf
);
2802 /* fill these in, for the case where they are -not- overwritten */
2803 cmd
->sense_buffer
[0] = 0x70;
2804 cmd
->sense_buffer
[2] = qc
->tf
.feature
>> 4;
2808 /* setup sg table and init transfer direction */
2809 sg_init_one(&qc
->sgent
, cmd
->sense_buffer
, SCSI_SENSE_BUFFERSIZE
);
2810 ata_sg_init(qc
, &qc
->sgent
, 1);
2811 qc
->dma_dir
= DMA_FROM_DEVICE
;
2813 memset(&qc
->cdb
, 0, qc
->dev
->cdb_len
);
2814 qc
->cdb
[0] = REQUEST_SENSE
;
2815 qc
->cdb
[4] = SCSI_SENSE_BUFFERSIZE
;
2817 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2818 qc
->tf
.command
= ATA_CMD_PACKET
;
2820 if (ata_pio_use_silly(ap
)) {
2821 qc
->tf
.protocol
= ATAPI_PROT_DMA
;
2822 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
2824 qc
->tf
.protocol
= ATAPI_PROT_PIO
;
2825 qc
->tf
.lbam
= SCSI_SENSE_BUFFERSIZE
;
2828 qc
->nbytes
= SCSI_SENSE_BUFFERSIZE
;
2830 qc
->complete_fn
= atapi_sense_complete
;
2838 * ATAPI devices typically report zero for their SCSI version, and sometimes
2839 * deviate from the spec WRT response data format. If SCSI version is
2840 * reported as zero like normal, then we make the following fixups:
2841 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a
2843 * 2) Ensure response data format / ATAPI information are always correct.
2845 static void atapi_fixup_inquiry(struct scsi_cmnd
*cmd
)
2849 sg_copy_to_buffer(scsi_sglist(cmd
), scsi_sg_count(cmd
), buf
, 4);
2854 sg_copy_from_buffer(scsi_sglist(cmd
), scsi_sg_count(cmd
), buf
, 4);
2857 static void atapi_qc_complete(struct ata_queued_cmd
*qc
)
2859 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2860 unsigned int err_mask
= qc
->err_mask
;
2862 VPRINTK("ENTER, err_mask 0x%X\n", err_mask
);
2864 /* handle completion from new EH */
2865 if (unlikely(qc
->ap
->ops
->error_handler
&&
2866 (err_mask
|| qc
->flags
& ATA_QCFLAG_SENSE_VALID
))) {
2868 if (!(qc
->flags
& ATA_QCFLAG_SENSE_VALID
)) {
2869 /* FIXME: not quite right; we don't want the
2870 * translation of taskfile registers into a
2871 * sense descriptors, since that's only
2872 * correct for ATA, not ATAPI
2874 ata_gen_passthru_sense(qc
);
2877 /* SCSI EH automatically locks door if sdev->locked is
2878 * set. Sometimes door lock request continues to
2879 * fail, for example, when no media is present. This
2880 * creates a loop - SCSI EH issues door lock which
2881 * fails and gets invoked again to acquire sense data
2882 * for the failed command.
2884 * If door lock fails, always clear sdev->locked to
2885 * avoid this infinite loop.
2887 * This may happen before SCSI scan is complete. Make
2888 * sure qc->dev->sdev isn't NULL before dereferencing.
2890 if (qc
->cdb
[0] == ALLOW_MEDIUM_REMOVAL
&& qc
->dev
->sdev
)
2891 qc
->dev
->sdev
->locked
= 0;
2893 qc
->scsicmd
->result
= SAM_STAT_CHECK_CONDITION
;
2898 /* successful completion or old EH failure path */
2899 if (unlikely(err_mask
& AC_ERR_DEV
)) {
2900 cmd
->result
= SAM_STAT_CHECK_CONDITION
;
2901 atapi_request_sense(qc
);
2903 } else if (unlikely(err_mask
)) {
2904 /* FIXME: not quite right; we don't want the
2905 * translation of taskfile registers into
2906 * a sense descriptors, since that's only
2907 * correct for ATA, not ATAPI
2909 ata_gen_passthru_sense(qc
);
2911 if (cmd
->cmnd
[0] == INQUIRY
&& (cmd
->cmnd
[1] & 0x03) == 0)
2912 atapi_fixup_inquiry(cmd
);
2913 cmd
->result
= SAM_STAT_GOOD
;
2919 * atapi_xlat - Initialize PACKET taskfile
2920 * @qc: command structure to be initialized
2923 * spin_lock_irqsave(host lock)
2926 * Zero on success, non-zero on failure.
2928 static unsigned int atapi_xlat(struct ata_queued_cmd
*qc
)
2930 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
2931 struct ata_device
*dev
= qc
->dev
;
2932 int nodata
= (scmd
->sc_data_direction
== DMA_NONE
);
2933 int using_pio
= !nodata
&& (dev
->flags
& ATA_DFLAG_PIO
);
2934 unsigned int nbytes
;
2936 memset(qc
->cdb
, 0, dev
->cdb_len
);
2937 memcpy(qc
->cdb
, scmd
->cmnd
, scmd
->cmd_len
);
2939 qc
->complete_fn
= atapi_qc_complete
;
2941 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2942 if (scmd
->sc_data_direction
== DMA_TO_DEVICE
) {
2943 qc
->tf
.flags
|= ATA_TFLAG_WRITE
;
2944 DPRINTK("direction: write\n");
2947 qc
->tf
.command
= ATA_CMD_PACKET
;
2948 ata_qc_set_pc_nbytes(qc
);
2950 /* check whether ATAPI DMA is safe */
2951 if (!nodata
&& !using_pio
&& atapi_check_dma(qc
))
2954 /* Some controller variants snoop this value for Packet
2955 * transfers to do state machine and FIFO management. Thus we
2956 * want to set it properly, and for DMA where it is
2957 * effectively meaningless.
2959 nbytes
= min(ata_qc_raw_nbytes(qc
), (unsigned int)63 * 1024);
2961 /* Most ATAPI devices which honor transfer chunk size don't
2962 * behave according to the spec when odd chunk size which
2963 * matches the transfer length is specified. If the number of
2964 * bytes to transfer is 2n+1. According to the spec, what
2965 * should happen is to indicate that 2n+1 is going to be
2966 * transferred and transfer 2n+2 bytes where the last byte is
2969 * In practice, this doesn't happen. ATAPI devices first
2970 * indicate and transfer 2n bytes and then indicate and
2971 * transfer 2 bytes where the last byte is padding.
2973 * This inconsistency confuses several controllers which
2974 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2975 * These controllers use actual number of transferred bytes to
2976 * update DMA pointer and transfer of 4n+2 bytes make those
2977 * controller push DMA pointer by 4n+4 bytes because SATA data
2978 * FISes are aligned to 4 bytes. This causes data corruption
2979 * and buffer overrun.
2981 * Always setting nbytes to even number solves this problem
2982 * because then ATAPI devices don't have to split data at 2n
2988 qc
->tf
.lbam
= (nbytes
& 0xFF);
2989 qc
->tf
.lbah
= (nbytes
>> 8);
2992 qc
->tf
.protocol
= ATAPI_PROT_NODATA
;
2994 qc
->tf
.protocol
= ATAPI_PROT_PIO
;
2997 qc
->tf
.protocol
= ATAPI_PROT_DMA
;
2998 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
3000 if ((dev
->flags
& ATA_DFLAG_DMADIR
) &&
3001 (scmd
->sc_data_direction
!= DMA_TO_DEVICE
))
3002 /* some SATA bridges need us to indicate data xfer direction */
3003 qc
->tf
.feature
|= ATAPI_DMADIR
;
3007 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
3008 as ATAPI tape drives don't get this right otherwise */
3012 static struct ata_device
*ata_find_dev(struct ata_port
*ap
, int devno
)
3014 if (!sata_pmp_attached(ap
)) {
3015 if (likely(devno
>= 0 &&
3016 devno
< ata_link_max_devices(&ap
->link
)))
3017 return &ap
->link
.device
[devno
];
3019 if (likely(devno
>= 0 &&
3020 devno
< ap
->nr_pmp_links
))
3021 return &ap
->pmp_link
[devno
].device
[0];
3027 static struct ata_device
*__ata_scsi_find_dev(struct ata_port
*ap
,
3028 const struct scsi_device
*scsidev
)
3032 /* skip commands not addressed to targets we simulate */
3033 if (!sata_pmp_attached(ap
)) {
3034 if (unlikely(scsidev
->channel
|| scsidev
->lun
))
3036 devno
= scsidev
->id
;
3038 if (unlikely(scsidev
->id
|| scsidev
->lun
))
3040 devno
= scsidev
->channel
;
3043 return ata_find_dev(ap
, devno
);
3047 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
3048 * @ap: ATA port to which the device is attached
3049 * @scsidev: SCSI device from which we derive the ATA device
3051 * Given various information provided in struct scsi_cmnd,
3052 * map that onto an ATA bus, and using that mapping
3053 * determine which ata_device is associated with the
3054 * SCSI command to be sent.
3057 * spin_lock_irqsave(host lock)
3060 * Associated ATA device, or %NULL if not found.
3062 static struct ata_device
*
3063 ata_scsi_find_dev(struct ata_port
*ap
, const struct scsi_device
*scsidev
)
3065 struct ata_device
*dev
= __ata_scsi_find_dev(ap
, scsidev
);
3067 if (unlikely(!dev
|| !ata_dev_enabled(dev
)))
3074 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
3075 * @byte1: Byte 1 from pass-thru CDB.
3078 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
3081 ata_scsi_map_proto(u8 byte1
)
3083 switch((byte1
& 0x1e) >> 1) {
3084 case 3: /* Non-data */
3085 return ATA_PROT_NODATA
;
3088 case 10: /* UDMA Data-in */
3089 case 11: /* UDMA Data-Out */
3090 return ATA_PROT_DMA
;
3092 case 4: /* PIO Data-in */
3093 case 5: /* PIO Data-out */
3094 return ATA_PROT_PIO
;
3096 case 12: /* FPDMA */
3097 return ATA_PROT_NCQ
;
3099 case 0: /* Hard Reset */
3101 case 8: /* Device Diagnostic */
3102 case 9: /* Device Reset */
3103 case 7: /* DMA Queued */
3104 case 15: /* Return Response Info */
3105 default: /* Reserved */
3109 return ATA_PROT_UNKNOWN
;
3113 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
3114 * @qc: command structure to be initialized
3116 * Handles either 12, 16, or 32-byte versions of the CDB.
3119 * Zero on success, non-zero on failure.
3121 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd
*qc
)
3123 struct ata_taskfile
*tf
= &(qc
->tf
);
3124 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
3125 struct ata_device
*dev
= qc
->dev
;
3126 const u8
*cdb
= scmd
->cmnd
;
3130 /* 7Fh variable length cmd means a ata pass-thru(32) */
3131 if (cdb
[0] == VARIABLE_LENGTH_CMD
)
3134 tf
->protocol
= ata_scsi_map_proto(cdb
[1 + cdb_offset
]);
3135 if (tf
->protocol
== ATA_PROT_UNKNOWN
) {
3140 if (ata_is_ncq(tf
->protocol
) && (cdb
[2 + cdb_offset
] & 0x3) == 0)
3141 tf
->protocol
= ATA_PROT_NCQ_NODATA
;
3144 tf
->flags
|= ATA_TFLAG_LBA
;
3147 * 12 and 16 byte CDBs use different offsets to
3148 * provide the various register values.
3150 if (cdb
[0] == ATA_16
) {
3152 * 16-byte CDB - may contain extended commands.
3154 * If that is the case, copy the upper byte register values.
3156 if (cdb
[1] & 0x01) {
3157 tf
->hob_feature
= cdb
[3];
3158 tf
->hob_nsect
= cdb
[5];
3159 tf
->hob_lbal
= cdb
[7];
3160 tf
->hob_lbam
= cdb
[9];
3161 tf
->hob_lbah
= cdb
[11];
3162 tf
->flags
|= ATA_TFLAG_LBA48
;
3164 tf
->flags
&= ~ATA_TFLAG_LBA48
;
3167 * Always copy low byte, device and command registers.
3169 tf
->feature
= cdb
[4];
3174 tf
->device
= cdb
[13];
3175 tf
->command
= cdb
[14];
3176 } else if (cdb
[0] == ATA_12
) {
3178 * 12-byte CDB - incapable of extended commands.
3180 tf
->flags
&= ~ATA_TFLAG_LBA48
;
3182 tf
->feature
= cdb
[3];
3187 tf
->device
= cdb
[8];
3188 tf
->command
= cdb
[9];
3191 * 32-byte CDB - may contain extended command fields.
3193 * If that is the case, copy the upper byte register values.
3195 if (cdb
[10] & 0x01) {
3196 tf
->hob_feature
= cdb
[20];
3197 tf
->hob_nsect
= cdb
[22];
3198 tf
->hob_lbal
= cdb
[16];
3199 tf
->hob_lbam
= cdb
[15];
3200 tf
->hob_lbah
= cdb
[14];
3201 tf
->flags
|= ATA_TFLAG_LBA48
;
3203 tf
->flags
&= ~ATA_TFLAG_LBA48
;
3205 tf
->feature
= cdb
[21];
3206 tf
->nsect
= cdb
[23];
3210 tf
->device
= cdb
[24];
3211 tf
->command
= cdb
[25];
3212 tf
->auxiliary
= get_unaligned_be32(&cdb
[28]);
3215 /* For NCQ commands copy the tag value */
3216 if (ata_is_ncq(tf
->protocol
))
3217 tf
->nsect
= qc
->hw_tag
<< 3;
3219 /* enforce correct master/slave bit */
3220 tf
->device
= dev
->devno
?
3221 tf
->device
| ATA_DEV1
: tf
->device
& ~ATA_DEV1
;
3223 switch (tf
->command
) {
3224 /* READ/WRITE LONG use a non-standard sect_size */
3225 case ATA_CMD_READ_LONG
:
3226 case ATA_CMD_READ_LONG_ONCE
:
3227 case ATA_CMD_WRITE_LONG
:
3228 case ATA_CMD_WRITE_LONG_ONCE
:
3229 if (tf
->protocol
!= ATA_PROT_PIO
|| tf
->nsect
!= 1) {
3233 qc
->sect_size
= scsi_bufflen(scmd
);
3236 /* commands using reported Logical Block size (e.g. 512 or 4K) */
3237 case ATA_CMD_CFA_WRITE_NE
:
3238 case ATA_CMD_CFA_TRANS_SECT
:
3239 case ATA_CMD_CFA_WRITE_MULT_NE
:
3240 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
3242 case ATA_CMD_READ_EXT
:
3243 case ATA_CMD_READ_QUEUED
:
3244 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
3245 case ATA_CMD_FPDMA_READ
:
3246 case ATA_CMD_READ_MULTI
:
3247 case ATA_CMD_READ_MULTI_EXT
:
3248 case ATA_CMD_PIO_READ
:
3249 case ATA_CMD_PIO_READ_EXT
:
3250 case ATA_CMD_READ_STREAM_DMA_EXT
:
3251 case ATA_CMD_READ_STREAM_EXT
:
3252 case ATA_CMD_VERIFY
:
3253 case ATA_CMD_VERIFY_EXT
:
3255 case ATA_CMD_WRITE_EXT
:
3256 case ATA_CMD_WRITE_FUA_EXT
:
3257 case ATA_CMD_WRITE_QUEUED
:
3258 case ATA_CMD_WRITE_QUEUED_FUA_EXT
:
3259 case ATA_CMD_FPDMA_WRITE
:
3260 case ATA_CMD_WRITE_MULTI
:
3261 case ATA_CMD_WRITE_MULTI_EXT
:
3262 case ATA_CMD_WRITE_MULTI_FUA_EXT
:
3263 case ATA_CMD_PIO_WRITE
:
3264 case ATA_CMD_PIO_WRITE_EXT
:
3265 case ATA_CMD_WRITE_STREAM_DMA_EXT
:
3266 case ATA_CMD_WRITE_STREAM_EXT
:
3267 qc
->sect_size
= scmd
->device
->sector_size
;
3270 /* Everything else uses 512 byte "sectors" */
3272 qc
->sect_size
= ATA_SECT_SIZE
;
3276 * Set flags so that all registers will be written, pass on
3277 * write indication (used for PIO/DMA setup), result TF is
3278 * copied back and we don't whine too much about its failure.
3280 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
3281 if (scmd
->sc_data_direction
== DMA_TO_DEVICE
)
3282 tf
->flags
|= ATA_TFLAG_WRITE
;
3284 qc
->flags
|= ATA_QCFLAG_RESULT_TF
| ATA_QCFLAG_QUIET
;
3287 * Set transfer length.
3289 * TODO: find out if we need to do more here to
3290 * cover scatter/gather case.
3292 ata_qc_set_pc_nbytes(qc
);
3294 /* We may not issue DMA commands if no DMA mode is set */
3295 if (tf
->protocol
== ATA_PROT_DMA
&& dev
->dma_mode
== 0) {
3300 /* We may not issue NCQ commands to devices not supporting NCQ */
3301 if (ata_is_ncq(tf
->protocol
) && !ata_ncq_enabled(dev
)) {
3306 /* sanity check for pio multi commands */
3307 if ((cdb
[1] & 0xe0) && !is_multi_taskfile(tf
)) {
3312 if (is_multi_taskfile(tf
)) {
3313 unsigned int multi_count
= 1 << (cdb
[1] >> 5);
3315 /* compare the passed through multi_count
3316 * with the cached multi_count of libata
3318 if (multi_count
!= dev
->multi_count
)
3319 ata_dev_warn(dev
, "invalid multi_count %u ignored\n",
3324 * Filter SET_FEATURES - XFER MODE command -- otherwise,
3325 * SET_FEATURES - XFER MODE must be preceded/succeeded
3326 * by an update to hardware-specific registers for each
3327 * controller (i.e. the reason for ->set_piomode(),
3328 * ->set_dmamode(), and ->post_set_mode() hooks).
3330 if (tf
->command
== ATA_CMD_SET_FEATURES
&&
3331 tf
->feature
== SETFEATURES_XFER
) {
3332 fp
= (cdb
[0] == ATA_16
) ? 4 : 3;
3337 * Filter TPM commands by default. These provide an
3338 * essentially uncontrolled encrypted "back door" between
3339 * applications and the disk. Set libata.allow_tpm=1 if you
3340 * have a real reason for wanting to use them. This ensures
3341 * that installed software cannot easily mess stuff up without
3342 * user intent. DVR type users will probably ship with this enabled
3343 * for movie content management.
3345 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
3346 * for this and should do in future but that it is not sufficient as
3347 * DCS is an optional feature set. Thus we also do the software filter
3348 * so that we comply with the TC consortium stated goal that the user
3349 * can turn off TC features of their system.
3351 if (tf
->command
>= 0x5C && tf
->command
<= 0x5F && !libata_allow_tpm
) {
3352 fp
= (cdb
[0] == ATA_16
) ? 14 : 9;
3359 ata_scsi_set_invalid_field(dev
, scmd
, fp
, 0xff);
3364 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim
3365 * @cmd: SCSI command being translated
3366 * @trmax: Maximum number of entries that will fit in sector_size bytes.
3367 * @sector: Starting sector
3368 * @count: Total Range of request in logical sectors
3370 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted
3373 * Upto 64 entries of the format:
3374 * 63:48 Range Length
3377 * Range Length of 0 is ignored.
3378 * LBA's should be sorted order and not overlap.
3380 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET
3382 * Return: Number of bytes copied into sglist.
3384 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd
*cmd
, u32 trmax
,
3385 u64 sector
, u32 count
)
3387 struct scsi_device
*sdp
= cmd
->device
;
3388 size_t len
= sdp
->sector_size
;
3392 unsigned long flags
;
3394 WARN_ON(len
> ATA_SCSI_RBUF_SIZE
);
3396 if (len
> ATA_SCSI_RBUF_SIZE
)
3397 len
= ATA_SCSI_RBUF_SIZE
;
3399 spin_lock_irqsave(&ata_scsi_rbuf_lock
, flags
);
3400 buf
= ((void *)ata_scsi_rbuf
);
3401 memset(buf
, 0, len
);
3403 u64 entry
= sector
|
3404 ((u64
)(count
> 0xffff ? 0xffff : count
) << 48);
3405 buf
[i
++] = __cpu_to_le64(entry
);
3406 if (count
<= 0xffff)
3411 r
= sg_copy_from_buffer(scsi_sglist(cmd
), scsi_sg_count(cmd
), buf
, len
);
3412 spin_unlock_irqrestore(&ata_scsi_rbuf_lock
, flags
);
3418 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same
3419 * @qc: Command to be translated
3421 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or
3422 * an SCT Write Same command.
3423 * Based on WRITE SAME has the UNMAP flag:
3425 * - When set translate to DSM TRIM
3426 * - When clear translate to SCT Write Same
3428 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd
*qc
)
3430 struct ata_taskfile
*tf
= &qc
->tf
;
3431 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
3432 struct scsi_device
*sdp
= scmd
->device
;
3433 size_t len
= sdp
->sector_size
;
3434 struct ata_device
*dev
= qc
->dev
;
3435 const u8
*cdb
= scmd
->cmnd
;
3438 const u32 trmax
= len
>> 3;
3442 u8 unmap
= cdb
[1] & 0x8;
3444 /* we may not issue DMA commands if no DMA mode is set */
3445 if (unlikely(!dev
->dma_mode
))
3446 goto invalid_opcode
;
3449 * We only allow sending this command through the block layer,
3450 * as it modifies the DATA OUT buffer, which would corrupt user
3451 * memory for SG_IO commands.
3453 if (unlikely(blk_rq_is_passthrough(scmd
->request
)))
3454 goto invalid_opcode
;
3456 if (unlikely(scmd
->cmd_len
< 16)) {
3460 scsi_16_lba_len(cdb
, &block
, &n_block
);
3463 (dev
->horkage
& ATA_HORKAGE_NOTRIM
) ||
3464 !ata_id_has_trim(dev
->id
)) {
3469 /* If the request is too large the cmd is invalid */
3470 if (n_block
> 0xffff * trmax
) {
3476 * WRITE SAME always has a sector sized buffer as payload, this
3477 * should never be a multiple entry S/G list.
3479 if (!scsi_sg_count(scmd
))
3480 goto invalid_param_len
;
3483 * size must match sector size in bytes
3484 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count)
3485 * is defined as number of 512 byte blocks to be transferred.
3488 size
= ata_format_dsm_trim_descr(scmd
, trmax
, block
, n_block
);
3490 goto invalid_param_len
;
3492 if (ata_ncq_enabled(dev
) && ata_fpdma_dsm_supported(dev
)) {
3493 /* Newer devices support queued TRIM commands */
3494 tf
->protocol
= ATA_PROT_NCQ
;
3495 tf
->command
= ATA_CMD_FPDMA_SEND
;
3496 tf
->hob_nsect
= ATA_SUBCMD_FPDMA_SEND_DSM
& 0x1f;
3497 tf
->nsect
= qc
->hw_tag
<< 3;
3498 tf
->hob_feature
= (size
/ 512) >> 8;
3499 tf
->feature
= size
/ 512;
3503 tf
->protocol
= ATA_PROT_DMA
;
3504 tf
->hob_feature
= 0;
3505 tf
->feature
= ATA_DSM_TRIM
;
3506 tf
->hob_nsect
= (size
/ 512) >> 8;
3507 tf
->nsect
= size
/ 512;
3508 tf
->command
= ATA_CMD_DSM
;
3511 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_LBA48
|
3514 ata_qc_set_pc_nbytes(qc
);
3519 ata_scsi_set_invalid_field(dev
, scmd
, fp
, bp
);
3522 /* "Parameter list length error" */
3523 ata_scsi_set_sense(dev
, scmd
, ILLEGAL_REQUEST
, 0x1a, 0x0);
3526 /* "Invalid command operation code" */
3527 ata_scsi_set_sense(dev
, scmd
, ILLEGAL_REQUEST
, 0x20, 0x0);
3532 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN
3533 * @args: device MAINTENANCE_IN data / SCSI command of interest.
3534 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
3536 * Yields a subset to satisfy scsi_report_opcode()
3539 * spin_lock_irqsave(host lock)
3541 static unsigned int ata_scsiop_maint_in(struct ata_scsi_args
*args
, u8
*rbuf
)
3543 struct ata_device
*dev
= args
->dev
;
3544 u8
*cdb
= args
->cmd
->cmnd
;
3546 unsigned int err
= 0;
3549 ata_dev_warn(dev
, "invalid command format %d\n", cdb
[2]);
3558 case SERVICE_ACTION_IN_16
:
3561 case SYNCHRONIZE_CACHE
:
3565 case TEST_UNIT_READY
:
3566 case SEND_DIAGNOSTIC
:
3567 case MAINTENANCE_IN
:
3579 case MODE_SELECT_10
:
3585 if (ata_id_zoned_cap(dev
->id
) ||
3586 dev
->class == ATA_DEV_ZAC
)
3589 case SECURITY_PROTOCOL_IN
:
3590 case SECURITY_PROTOCOL_OUT
:
3591 if (dev
->flags
& ATA_DFLAG_TRUSTED
)
3598 rbuf
[1] = supported
; /* supported */
3603 * ata_scsi_report_zones_complete - convert ATA output
3604 * @qc: command structure returning the data
3606 * Convert T-13 little-endian field representation into
3607 * T-10 big-endian field representation.
3610 static void ata_scsi_report_zones_complete(struct ata_queued_cmd
*qc
)
3612 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
3613 struct sg_mapping_iter miter
;
3614 unsigned long flags
;
3615 unsigned int bytes
= 0;
3617 sg_miter_start(&miter
, scsi_sglist(scmd
), scsi_sg_count(scmd
),
3618 SG_MITER_TO_SG
| SG_MITER_ATOMIC
);
3620 local_irq_save(flags
);
3621 while (sg_miter_next(&miter
)) {
3622 unsigned int offset
= 0;
3627 u64 max_lba
, opt_lba
;
3630 /* Swizzle header */
3632 list_length
= get_unaligned_le32(&hdr
[0]);
3633 same
= get_unaligned_le16(&hdr
[4]);
3634 max_lba
= get_unaligned_le64(&hdr
[8]);
3635 opt_lba
= get_unaligned_le64(&hdr
[16]);
3636 put_unaligned_be32(list_length
, &hdr
[0]);
3637 hdr
[4] = same
& 0xf;
3638 put_unaligned_be64(max_lba
, &hdr
[8]);
3639 put_unaligned_be64(opt_lba
, &hdr
[16]);
3643 while (offset
< miter
.length
) {
3645 u8 cond
, type
, non_seq
, reset
;
3646 u64 size
, start
, wp
;
3648 /* Swizzle zone descriptor */
3649 rec
= miter
.addr
+ offset
;
3650 type
= rec
[0] & 0xf;
3651 cond
= (rec
[1] >> 4) & 0xf;
3652 non_seq
= (rec
[1] & 2);
3653 reset
= (rec
[1] & 1);
3654 size
= get_unaligned_le64(&rec
[8]);
3655 start
= get_unaligned_le64(&rec
[16]);
3656 wp
= get_unaligned_le64(&rec
[24]);
3658 rec
[1] = (cond
<< 4) | non_seq
| reset
;
3659 put_unaligned_be64(size
, &rec
[8]);
3660 put_unaligned_be64(start
, &rec
[16]);
3661 put_unaligned_be64(wp
, &rec
[24]);
3662 WARN_ON(offset
+ 64 > miter
.length
);
3667 sg_miter_stop(&miter
);
3668 local_irq_restore(flags
);
3670 ata_scsi_qc_complete(qc
);
3673 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd
*qc
)
3675 struct ata_taskfile
*tf
= &qc
->tf
;
3676 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
3677 const u8
*cdb
= scmd
->cmnd
;
3678 u16 sect
, fp
= (u16
)-1;
3679 u8 sa
, options
, bp
= 0xff;
3683 if (unlikely(scmd
->cmd_len
< 16)) {
3684 ata_dev_warn(qc
->dev
, "invalid cdb length %d\n",
3689 scsi_16_lba_len(cdb
, &block
, &n_block
);
3690 if (n_block
!= scsi_bufflen(scmd
)) {
3691 ata_dev_warn(qc
->dev
, "non-matching transfer count (%d/%d)\n",
3692 n_block
, scsi_bufflen(scmd
));
3693 goto invalid_param_len
;
3696 if (sa
!= ZI_REPORT_ZONES
) {
3697 ata_dev_warn(qc
->dev
, "invalid service action %d\n", sa
);
3702 * ZAC allows only for transfers in 512 byte blocks,
3703 * and uses a 16 bit value for the transfer count.
3705 if ((n_block
/ 512) > 0xffff || n_block
< 512 || (n_block
% 512)) {
3706 ata_dev_warn(qc
->dev
, "invalid transfer count %d\n", n_block
);
3707 goto invalid_param_len
;
3709 sect
= n_block
/ 512;
3710 options
= cdb
[14] & 0xbf;
3712 if (ata_ncq_enabled(qc
->dev
) &&
3713 ata_fpdma_zac_mgmt_in_supported(qc
->dev
)) {
3714 tf
->protocol
= ATA_PROT_NCQ
;
3715 tf
->command
= ATA_CMD_FPDMA_RECV
;
3716 tf
->hob_nsect
= ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN
& 0x1f;
3717 tf
->nsect
= qc
->hw_tag
<< 3;
3718 tf
->feature
= sect
& 0xff;
3719 tf
->hob_feature
= (sect
>> 8) & 0xff;
3720 tf
->auxiliary
= ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES
| (options
<< 8);
3722 tf
->command
= ATA_CMD_ZAC_MGMT_IN
;
3723 tf
->feature
= ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES
;
3724 tf
->protocol
= ATA_PROT_DMA
;
3725 tf
->hob_feature
= options
;
3726 tf
->hob_nsect
= (sect
>> 8) & 0xff;
3727 tf
->nsect
= sect
& 0xff;
3729 tf
->device
= ATA_LBA
;
3730 tf
->lbah
= (block
>> 16) & 0xff;
3731 tf
->lbam
= (block
>> 8) & 0xff;
3732 tf
->lbal
= block
& 0xff;
3733 tf
->hob_lbah
= (block
>> 40) & 0xff;
3734 tf
->hob_lbam
= (block
>> 32) & 0xff;
3735 tf
->hob_lbal
= (block
>> 24) & 0xff;
3737 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_LBA48
;
3738 qc
->flags
|= ATA_QCFLAG_RESULT_TF
;
3740 ata_qc_set_pc_nbytes(qc
);
3742 qc
->complete_fn
= ata_scsi_report_zones_complete
;
3747 ata_scsi_set_invalid_field(qc
->dev
, scmd
, fp
, bp
);
3751 /* "Parameter list length error" */
3752 ata_scsi_set_sense(qc
->dev
, scmd
, ILLEGAL_REQUEST
, 0x1a, 0x0);
3756 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd
*qc
)
3758 struct ata_taskfile
*tf
= &qc
->tf
;
3759 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
3760 struct ata_device
*dev
= qc
->dev
;
3761 const u8
*cdb
= scmd
->cmnd
;
3767 if (unlikely(scmd
->cmd_len
< 16)) {
3773 if ((sa
!= ZO_CLOSE_ZONE
) && (sa
!= ZO_FINISH_ZONE
) &&
3774 (sa
!= ZO_OPEN_ZONE
) && (sa
!= ZO_RESET_WRITE_POINTER
)) {
3779 scsi_16_lba_len(cdb
, &block
, &n_block
);
3782 * ZAC MANAGEMENT OUT doesn't define any length
3784 goto invalid_param_len
;
3787 all
= cdb
[14] & 0x1;
3790 * Ignore the block address (zone ID) as defined by ZBC.
3793 } else if (block
>= dev
->n_sectors
) {
3795 * Block must be a valid zone ID (a zone start LBA).
3801 if (ata_ncq_enabled(qc
->dev
) &&
3802 ata_fpdma_zac_mgmt_out_supported(qc
->dev
)) {
3803 tf
->protocol
= ATA_PROT_NCQ_NODATA
;
3804 tf
->command
= ATA_CMD_NCQ_NON_DATA
;
3805 tf
->feature
= ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT
;
3806 tf
->nsect
= qc
->hw_tag
<< 3;
3807 tf
->auxiliary
= sa
| ((u16
)all
<< 8);
3809 tf
->protocol
= ATA_PROT_NODATA
;
3810 tf
->command
= ATA_CMD_ZAC_MGMT_OUT
;
3812 tf
->hob_feature
= all
;
3814 tf
->lbah
= (block
>> 16) & 0xff;
3815 tf
->lbam
= (block
>> 8) & 0xff;
3816 tf
->lbal
= block
& 0xff;
3817 tf
->hob_lbah
= (block
>> 40) & 0xff;
3818 tf
->hob_lbam
= (block
>> 32) & 0xff;
3819 tf
->hob_lbal
= (block
>> 24) & 0xff;
3820 tf
->device
= ATA_LBA
;
3821 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_LBA48
;
3826 ata_scsi_set_invalid_field(qc
->dev
, scmd
, fp
, 0xff);
3829 /* "Parameter list length error" */
3830 ata_scsi_set_sense(qc
->dev
, scmd
, ILLEGAL_REQUEST
, 0x1a, 0x0);
3835 * ata_mselect_caching - Simulate MODE SELECT for caching info page
3836 * @qc: Storage for translated ATA taskfile
3837 * @buf: input buffer
3838 * @len: number of valid bytes in the input buffer
3839 * @fp: out parameter for the failed field on error
3841 * Prepare a taskfile to modify caching information for the device.
3846 static int ata_mselect_caching(struct ata_queued_cmd
*qc
,
3847 const u8
*buf
, int len
, u16
*fp
)
3849 struct ata_taskfile
*tf
= &qc
->tf
;
3850 struct ata_device
*dev
= qc
->dev
;
3851 u8 mpage
[CACHE_MPAGE_LEN
];
3856 * The first two bytes of def_cache_mpage are a header, so offsets
3857 * in mpage are off by 2 compared to buf. Same for len.
3860 if (len
!= CACHE_MPAGE_LEN
- 2) {
3861 if (len
< CACHE_MPAGE_LEN
- 2)
3864 *fp
= CACHE_MPAGE_LEN
- 2;
3868 wce
= buf
[0] & (1 << 2);
3871 * Check that read-only bits are not modified.
3873 ata_msense_caching(dev
->id
, mpage
, false);
3874 for (i
= 0; i
< CACHE_MPAGE_LEN
- 2; i
++) {
3877 if (mpage
[i
+ 2] != buf
[i
]) {
3883 tf
->flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
3884 tf
->protocol
= ATA_PROT_NODATA
;
3886 tf
->command
= ATA_CMD_SET_FEATURES
;
3887 tf
->feature
= wce
? SETFEATURES_WC_ON
: SETFEATURES_WC_OFF
;
3892 * ata_mselect_control - Simulate MODE SELECT for control page
3893 * @qc: Storage for translated ATA taskfile
3894 * @buf: input buffer
3895 * @len: number of valid bytes in the input buffer
3896 * @fp: out parameter for the failed field on error
3898 * Prepare a taskfile to modify caching information for the device.
3903 static int ata_mselect_control(struct ata_queued_cmd
*qc
,
3904 const u8
*buf
, int len
, u16
*fp
)
3906 struct ata_device
*dev
= qc
->dev
;
3907 u8 mpage
[CONTROL_MPAGE_LEN
];
3912 * The first two bytes of def_control_mpage are a header, so offsets
3913 * in mpage are off by 2 compared to buf. Same for len.
3916 if (len
!= CONTROL_MPAGE_LEN
- 2) {
3917 if (len
< CONTROL_MPAGE_LEN
- 2)
3920 *fp
= CONTROL_MPAGE_LEN
- 2;
3924 d_sense
= buf
[0] & (1 << 2);
3927 * Check that read-only bits are not modified.
3929 ata_msense_control(dev
, mpage
, false);
3930 for (i
= 0; i
< CONTROL_MPAGE_LEN
- 2; i
++) {
3933 if (mpage
[2 + i
] != buf
[i
]) {
3938 if (d_sense
& (1 << 2))
3939 dev
->flags
|= ATA_DFLAG_D_SENSE
;
3941 dev
->flags
&= ~ATA_DFLAG_D_SENSE
;
3946 * ata_scsi_mode_select_xlat - Simulate MODE SELECT 6, 10 commands
3947 * @qc: Storage for translated ATA taskfile
3949 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile.
3950 * Assume this is invoked for direct access devices (e.g. disks) only.
3951 * There should be no block descriptor for other device types.
3954 * spin_lock_irqsave(host lock)
3956 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd
*qc
)
3958 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
3959 const u8
*cdb
= scmd
->cmnd
;
3962 unsigned six_byte
, pg_len
, hdr_len
, bd_len
;
3969 six_byte
= (cdb
[0] == MODE_SELECT
);
3971 if (scmd
->cmd_len
< 5) {
3979 if (scmd
->cmd_len
< 9) {
3984 len
= (cdb
[7] << 8) + cdb
[8];
3988 /* We only support PF=1, SP=0. */
3989 if ((cdb
[1] & 0x11) != 0x10) {
3991 bp
= (cdb
[1] & 0x01) ? 1 : 5;
3995 /* Test early for possible overrun. */
3996 if (!scsi_sg_count(scmd
) || scsi_sglist(scmd
)->length
< len
)
3997 goto invalid_param_len
;
3999 p
= page_address(sg_page(scsi_sglist(scmd
)));
4001 /* Move past header and block descriptors. */
4003 goto invalid_param_len
;
4008 bd_len
= (p
[6] << 8) + p
[7];
4013 goto invalid_param_len
;
4014 if (bd_len
!= 0 && bd_len
!= 8) {
4015 fp
= (six_byte
) ? 3 : 6;
4016 fp
+= bd_len
+ hdr_len
;
4025 /* Parse both possible formats for the mode page headers. */
4029 goto invalid_param_len
;
4032 pg_len
= (p
[2] << 8) | p
[3];
4037 goto invalid_param_len
;
4046 * No mode subpages supported (yet) but asking for _all_
4047 * subpages may be valid
4049 if (spg
&& (spg
!= ALL_SUB_MPAGES
)) {
4050 fp
= (p
[0] & 0x40) ? 1 : 0;
4051 fp
+= hdr_len
+ bd_len
;
4055 goto invalid_param_len
;
4059 if (ata_mselect_caching(qc
, p
, pg_len
, &fp
) < 0) {
4060 fp
+= hdr_len
+ bd_len
;
4065 if (ata_mselect_control(qc
, p
, pg_len
, &fp
) < 0) {
4066 fp
+= hdr_len
+ bd_len
;
4069 goto skip
; /* No ATA command to send */
4072 default: /* invalid page code */
4073 fp
= bd_len
+ hdr_len
;
4078 * Only one page has changeable data, so we only support setting one
4087 ata_scsi_set_invalid_field(qc
->dev
, scmd
, fp
, bp
);
4091 ata_scsi_set_invalid_parameter(qc
->dev
, scmd
, fp
);
4095 /* "Parameter list length error" */
4096 ata_scsi_set_sense(qc
->dev
, scmd
, ILLEGAL_REQUEST
, 0x1a, 0x0);
4100 scmd
->result
= SAM_STAT_GOOD
;
4104 static u8
ata_scsi_trusted_op(u32 len
, bool send
, bool dma
)
4107 return ATA_CMD_TRUSTED_NONDATA
;
4109 return dma
? ATA_CMD_TRUSTED_SND_DMA
: ATA_CMD_TRUSTED_SND
;
4111 return dma
? ATA_CMD_TRUSTED_RCV_DMA
: ATA_CMD_TRUSTED_RCV
;
4114 static unsigned int ata_scsi_security_inout_xlat(struct ata_queued_cmd
*qc
)
4116 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
4117 const u8
*cdb
= scmd
->cmnd
;
4118 struct ata_taskfile
*tf
= &qc
->tf
;
4120 bool send
= (cdb
[0] == SECURITY_PROTOCOL_OUT
);
4121 u16 spsp
= get_unaligned_be16(&cdb
[2]);
4122 u32 len
= get_unaligned_be32(&cdb
[6]);
4123 bool dma
= !(qc
->dev
->flags
& ATA_DFLAG_PIO
);
4126 * We don't support the ATA "security" protocol.
4129 ata_scsi_set_invalid_field(qc
->dev
, scmd
, 1, 0);
4133 if (cdb
[4] & 7) { /* INC_512 */
4135 ata_scsi_set_invalid_field(qc
->dev
, scmd
, 6, 0);
4139 if (len
> 0x01fffe00) {
4140 ata_scsi_set_invalid_field(qc
->dev
, scmd
, 6, 0);
4144 /* convert to the sector-based ATA addressing */
4145 len
= (len
+ 511) / 512;
4148 tf
->protocol
= dma
? ATA_PROT_DMA
: ATA_PROT_PIO
;
4149 tf
->flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
| ATA_TFLAG_LBA
;
4151 tf
->flags
|= ATA_TFLAG_WRITE
;
4152 tf
->command
= ata_scsi_trusted_op(len
, send
, dma
);
4154 tf
->lbam
= spsp
& 0xff;
4155 tf
->lbah
= spsp
>> 8;
4158 tf
->nsect
= len
& 0xff;
4159 tf
->lbal
= len
>> 8;
4162 tf
->lbah
= (1 << 7);
4165 ata_qc_set_pc_nbytes(qc
);
4170 * ata_scsi_var_len_cdb_xlat - SATL variable length CDB to Handler
4171 * @qc: Command to be translated
4173 * Translate a SCSI variable length CDB to specified commands.
4174 * It checks a service action value in CDB to call corresponding handler.
4177 * Zero on success, non-zero on failure
4180 static unsigned int ata_scsi_var_len_cdb_xlat(struct ata_queued_cmd
*qc
)
4182 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
4183 const u8
*cdb
= scmd
->cmnd
;
4184 const u16 sa
= get_unaligned_be16(&cdb
[8]);
4187 * if service action represents a ata pass-thru(32) command,
4188 * then pass it to ata_scsi_pass_thru handler.
4191 return ata_scsi_pass_thru(qc
);
4193 /* unsupported service action */
4198 * ata_get_xlat_func - check if SCSI to ATA translation is possible
4200 * @cmd: SCSI command opcode to consider
4202 * Look up the SCSI command given, and determine whether the
4203 * SCSI command is to be translated or simulated.
4206 * Pointer to translation function if possible, %NULL if not.
4209 static inline ata_xlat_func_t
ata_get_xlat_func(struct ata_device
*dev
, u8 cmd
)
4219 return ata_scsi_rw_xlat
;
4222 return ata_scsi_write_same_xlat
;
4224 case SYNCHRONIZE_CACHE
:
4225 if (ata_try_flush_cache(dev
))
4226 return ata_scsi_flush_xlat
;
4231 return ata_scsi_verify_xlat
;
4235 return ata_scsi_pass_thru
;
4237 case VARIABLE_LENGTH_CMD
:
4238 return ata_scsi_var_len_cdb_xlat
;
4241 case MODE_SELECT_10
:
4242 return ata_scsi_mode_select_xlat
;
4246 return ata_scsi_zbc_in_xlat
;
4249 return ata_scsi_zbc_out_xlat
;
4251 case SECURITY_PROTOCOL_IN
:
4252 case SECURITY_PROTOCOL_OUT
:
4253 if (!(dev
->flags
& ATA_DFLAG_TRUSTED
))
4255 return ata_scsi_security_inout_xlat
;
4258 return ata_scsi_start_stop_xlat
;
4265 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
4266 * @ap: ATA port to which the command was being sent
4267 * @cmd: SCSI command to dump
4269 * Prints the contents of a SCSI command via printk().
4272 static inline void ata_scsi_dump_cdb(struct ata_port
*ap
,
4273 struct scsi_cmnd
*cmd
)
4275 #ifdef ATA_VERBOSE_DEBUG
4276 struct scsi_device
*scsidev
= cmd
->device
;
4278 VPRINTK("CDB (%u:%d,%d,%lld) %9ph\n",
4280 scsidev
->channel
, scsidev
->id
, scsidev
->lun
,
4285 static inline int __ata_scsi_queuecmd(struct scsi_cmnd
*scmd
,
4286 struct ata_device
*dev
)
4288 u8 scsi_op
= scmd
->cmnd
[0];
4289 ata_xlat_func_t xlat_func
;
4292 if (dev
->class == ATA_DEV_ATA
|| dev
->class == ATA_DEV_ZAC
) {
4293 if (unlikely(!scmd
->cmd_len
|| scmd
->cmd_len
> dev
->cdb_len
))
4296 xlat_func
= ata_get_xlat_func(dev
, scsi_op
);
4298 if (unlikely(!scmd
->cmd_len
))
4302 if (likely((scsi_op
!= ATA_16
) || !atapi_passthru16
)) {
4303 /* relay SCSI command to ATAPI device */
4304 int len
= COMMAND_SIZE(scsi_op
);
4305 if (unlikely(len
> scmd
->cmd_len
||
4306 len
> dev
->cdb_len
||
4307 scmd
->cmd_len
> ATAPI_CDB_LEN
))
4310 xlat_func
= atapi_xlat
;
4312 /* ATA_16 passthru, treat as an ATA command */
4313 if (unlikely(scmd
->cmd_len
> 16))
4316 xlat_func
= ata_get_xlat_func(dev
, scsi_op
);
4321 rc
= ata_scsi_translate(dev
, scmd
, xlat_func
);
4323 ata_scsi_simulate(dev
, scmd
);
4328 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
4329 scmd
->cmd_len
, scsi_op
, dev
->cdb_len
);
4330 scmd
->result
= DID_ERROR
<< 16;
4331 scmd
->scsi_done(scmd
);
4336 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
4337 * @shost: SCSI host of command to be sent
4338 * @cmd: SCSI command to be sent
4340 * In some cases, this function translates SCSI commands into
4341 * ATA taskfiles, and queues the taskfiles to be sent to
4342 * hardware. In other cases, this function simulates a
4343 * SCSI device by evaluating and responding to certain
4344 * SCSI commands. This creates the overall effect of
4345 * ATA and ATAPI devices appearing as SCSI devices.
4351 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
4354 int ata_scsi_queuecmd(struct Scsi_Host
*shost
, struct scsi_cmnd
*cmd
)
4356 struct ata_port
*ap
;
4357 struct ata_device
*dev
;
4358 struct scsi_device
*scsidev
= cmd
->device
;
4360 unsigned long irq_flags
;
4362 ap
= ata_shost_to_port(shost
);
4364 spin_lock_irqsave(ap
->lock
, irq_flags
);
4366 ata_scsi_dump_cdb(ap
, cmd
);
4368 dev
= ata_scsi_find_dev(ap
, scsidev
);
4370 rc
= __ata_scsi_queuecmd(cmd
, dev
);
4372 cmd
->result
= (DID_BAD_TARGET
<< 16);
4373 cmd
->scsi_done(cmd
);
4376 spin_unlock_irqrestore(ap
->lock
, irq_flags
);
4382 * ata_scsi_simulate - simulate SCSI command on ATA device
4383 * @dev: the target device
4384 * @cmd: SCSI command being sent to device.
4386 * Interprets and directly executes a select list of SCSI commands
4387 * that can be handled internally.
4390 * spin_lock_irqsave(host lock)
4393 void ata_scsi_simulate(struct ata_device
*dev
, struct scsi_cmnd
*cmd
)
4395 struct ata_scsi_args args
;
4396 const u8
*scsicmd
= cmd
->cmnd
;
4403 switch(scsicmd
[0]) {
4405 if (scsicmd
[1] & 2) /* is CmdDt set? */
4406 ata_scsi_set_invalid_field(dev
, cmd
, 1, 0xff);
4407 else if ((scsicmd
[1] & 1) == 0) /* is EVPD clear? */
4408 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_std
);
4409 else switch (scsicmd
[2]) {
4411 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_00
);
4414 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_80
);
4417 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_83
);
4420 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_89
);
4423 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_b0
);
4426 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_b1
);
4429 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_b2
);
4432 if (dev
->flags
& ATA_DFLAG_ZAC
) {
4433 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_b6
);
4438 ata_scsi_set_invalid_field(dev
, cmd
, 2, 0xff);
4445 ata_scsi_rbuf_fill(&args
, ata_scsiop_mode_sense
);
4449 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
4452 case SERVICE_ACTION_IN_16
:
4453 if ((scsicmd
[1] & 0x1f) == SAI_READ_CAPACITY_16
)
4454 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
4456 ata_scsi_set_invalid_field(dev
, cmd
, 1, 0xff);
4460 ata_scsi_rbuf_fill(&args
, ata_scsiop_report_luns
);
4464 ata_scsi_set_sense(dev
, cmd
, 0, 0, 0);
4465 cmd
->result
= (DRIVER_SENSE
<< 24);
4468 /* if we reach this, then writeback caching is disabled,
4469 * turning this into a no-op.
4471 case SYNCHRONIZE_CACHE
:
4474 /* no-op's, complete with success */
4478 case TEST_UNIT_READY
:
4481 case SEND_DIAGNOSTIC
:
4482 tmp8
= scsicmd
[1] & ~(1 << 3);
4483 if (tmp8
!= 0x4 || scsicmd
[3] || scsicmd
[4])
4484 ata_scsi_set_invalid_field(dev
, cmd
, 1, 0xff);
4487 case MAINTENANCE_IN
:
4488 if (scsicmd
[1] == MI_REPORT_SUPPORTED_OPERATION_CODES
)
4489 ata_scsi_rbuf_fill(&args
, ata_scsiop_maint_in
);
4491 ata_scsi_set_invalid_field(dev
, cmd
, 1, 0xff);
4494 /* all other commands */
4496 ata_scsi_set_sense(dev
, cmd
, ILLEGAL_REQUEST
, 0x20, 0x0);
4497 /* "Invalid command operation code" */
4501 cmd
->scsi_done(cmd
);
4504 int ata_scsi_add_hosts(struct ata_host
*host
, struct scsi_host_template
*sht
)
4508 for (i
= 0; i
< host
->n_ports
; i
++) {
4509 struct ata_port
*ap
= host
->ports
[i
];
4510 struct Scsi_Host
*shost
;
4513 shost
= scsi_host_alloc(sht
, sizeof(struct ata_port
*));
4517 shost
->eh_noresume
= 1;
4518 *(struct ata_port
**)&shost
->hostdata
[0] = ap
;
4519 ap
->scsi_host
= shost
;
4521 shost
->transportt
= ata_scsi_transport_template
;
4522 shost
->unique_id
= ap
->print_id
;
4525 shost
->max_channel
= 1;
4526 shost
->max_cmd_len
= 32;
4528 /* Schedule policy is determined by ->qc_defer()
4529 * callback and it needs to see every deferred qc.
4530 * Set host_blocked to 1 to prevent SCSI midlayer from
4531 * automatically deferring requests.
4533 shost
->max_host_blocked
= 1;
4535 rc
= scsi_add_host_with_dma(ap
->scsi_host
,
4536 &ap
->tdev
, ap
->host
->dev
);
4544 scsi_host_put(host
->ports
[i
]->scsi_host
);
4547 struct Scsi_Host
*shost
= host
->ports
[i
]->scsi_host
;
4549 scsi_remove_host(shost
);
4550 scsi_host_put(shost
);
4555 void ata_scsi_scan_host(struct ata_port
*ap
, int sync
)
4558 struct ata_device
*last_failed_dev
= NULL
;
4559 struct ata_link
*link
;
4560 struct ata_device
*dev
;
4563 ata_for_each_link(link
, ap
, EDGE
) {
4564 ata_for_each_dev(dev
, link
, ENABLED
) {
4565 struct scsi_device
*sdev
;
4566 int channel
= 0, id
= 0;
4571 if (ata_is_host_link(link
))
4574 channel
= link
->pmp
;
4576 sdev
= __scsi_add_device(ap
->scsi_host
, channel
, id
, 0,
4578 if (!IS_ERR(sdev
)) {
4580 scsi_device_put(sdev
);
4587 /* If we scanned while EH was in progress or allocation
4588 * failure occurred, scan would have failed silently. Check
4589 * whether all devices are attached.
4591 ata_for_each_link(link
, ap
, EDGE
) {
4592 ata_for_each_dev(dev
, link
, ENABLED
) {
4601 /* we're missing some SCSI devices */
4603 /* If caller requested synchrnous scan && we've made
4604 * any progress, sleep briefly and repeat.
4606 if (dev
!= last_failed_dev
) {
4608 last_failed_dev
= dev
;
4612 /* We might be failing to detect boot device, give it
4613 * a few more chances.
4621 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n");
4624 queue_delayed_work(system_long_wq
, &ap
->hotplug_task
,
4625 round_jiffies_relative(HZ
));
4629 * ata_scsi_offline_dev - offline attached SCSI device
4630 * @dev: ATA device to offline attached SCSI device for
4632 * This function is called from ata_eh_hotplug() and responsible
4633 * for taking the SCSI device attached to @dev offline. This
4634 * function is called with host lock which protects dev->sdev
4638 * spin_lock_irqsave(host lock)
4641 * 1 if attached SCSI device exists, 0 otherwise.
4643 int ata_scsi_offline_dev(struct ata_device
*dev
)
4646 scsi_device_set_state(dev
->sdev
, SDEV_OFFLINE
);
4653 * ata_scsi_remove_dev - remove attached SCSI device
4654 * @dev: ATA device to remove attached SCSI device for
4656 * This function is called from ata_eh_scsi_hotplug() and
4657 * responsible for removing the SCSI device attached to @dev.
4660 * Kernel thread context (may sleep).
4662 static void ata_scsi_remove_dev(struct ata_device
*dev
)
4664 struct ata_port
*ap
= dev
->link
->ap
;
4665 struct scsi_device
*sdev
;
4666 unsigned long flags
;
4668 /* Alas, we need to grab scan_mutex to ensure SCSI device
4669 * state doesn't change underneath us and thus
4670 * scsi_device_get() always succeeds. The mutex locking can
4671 * be removed if there is __scsi_device_get() interface which
4672 * increments reference counts regardless of device state.
4674 mutex_lock(&ap
->scsi_host
->scan_mutex
);
4675 spin_lock_irqsave(ap
->lock
, flags
);
4677 /* clearing dev->sdev is protected by host lock */
4682 /* If user initiated unplug races with us, sdev can go
4683 * away underneath us after the host lock and
4684 * scan_mutex are released. Hold onto it.
4686 if (scsi_device_get(sdev
) == 0) {
4687 /* The following ensures the attached sdev is
4688 * offline on return from ata_scsi_offline_dev()
4689 * regardless it wins or loses the race
4690 * against this function.
4692 scsi_device_set_state(sdev
, SDEV_OFFLINE
);
4699 spin_unlock_irqrestore(ap
->lock
, flags
);
4700 mutex_unlock(&ap
->scsi_host
->scan_mutex
);
4703 ata_dev_info(dev
, "detaching (SCSI %s)\n",
4704 dev_name(&sdev
->sdev_gendev
));
4706 scsi_remove_device(sdev
);
4707 scsi_device_put(sdev
);
4711 static void ata_scsi_handle_link_detach(struct ata_link
*link
)
4713 struct ata_port
*ap
= link
->ap
;
4714 struct ata_device
*dev
;
4716 ata_for_each_dev(dev
, link
, ALL
) {
4717 unsigned long flags
;
4719 if (!(dev
->flags
& ATA_DFLAG_DETACHED
))
4722 spin_lock_irqsave(ap
->lock
, flags
);
4723 dev
->flags
&= ~ATA_DFLAG_DETACHED
;
4724 spin_unlock_irqrestore(ap
->lock
, flags
);
4726 if (zpodd_dev_enabled(dev
))
4729 ata_scsi_remove_dev(dev
);
4734 * ata_scsi_media_change_notify - send media change event
4735 * @dev: Pointer to the disk device with media change event
4737 * Tell the block layer to send a media change notification
4741 * spin_lock_irqsave(host lock)
4743 void ata_scsi_media_change_notify(struct ata_device
*dev
)
4746 sdev_evt_send_simple(dev
->sdev
, SDEV_EVT_MEDIA_CHANGE
,
4751 * ata_scsi_hotplug - SCSI part of hotplug
4752 * @work: Pointer to ATA port to perform SCSI hotplug on
4754 * Perform SCSI part of hotplug. It's executed from a separate
4755 * workqueue after EH completes. This is necessary because SCSI
4756 * hot plugging requires working EH and hot unplugging is
4757 * synchronized with hot plugging with a mutex.
4760 * Kernel thread context (may sleep).
4762 void ata_scsi_hotplug(struct work_struct
*work
)
4764 struct ata_port
*ap
=
4765 container_of(work
, struct ata_port
, hotplug_task
.work
);
4768 if (ap
->pflags
& ATA_PFLAG_UNLOADING
) {
4769 DPRINTK("ENTER/EXIT - unloading\n");
4776 * The block layer suspend/resume path is fundamentally broken due
4777 * to freezable kthreads and workqueue and may deadlock if a block
4778 * device gets removed while resume is in progress. I don't know
4779 * what the solution is short of removing freezable kthreads and
4780 * workqueues altogether.
4782 * The following is an ugly hack to avoid kicking off device
4783 * removal while freezer is active. This is a joke but does avoid
4784 * this particular deadlock scenario.
4786 * https://bugzilla.kernel.org/show_bug.cgi?id=62801
4787 * http://marc.info/?l=linux-kernel&m=138695698516487
4789 #ifdef CONFIG_FREEZER
4795 mutex_lock(&ap
->scsi_scan_mutex
);
4797 /* Unplug detached devices. We cannot use link iterator here
4798 * because PMP links have to be scanned even if PMP is
4799 * currently not attached. Iterate manually.
4801 ata_scsi_handle_link_detach(&ap
->link
);
4803 for (i
= 0; i
< SATA_PMP_MAX_PORTS
; i
++)
4804 ata_scsi_handle_link_detach(&ap
->pmp_link
[i
]);
4806 /* scan for new ones */
4807 ata_scsi_scan_host(ap
, 0);
4809 mutex_unlock(&ap
->scsi_scan_mutex
);
4814 * ata_scsi_user_scan - indication for user-initiated bus scan
4815 * @shost: SCSI host to scan
4816 * @channel: Channel to scan
4820 * This function is called when user explicitly requests bus
4821 * scan. Set probe pending flag and invoke EH.
4824 * SCSI layer (we don't care)
4829 int ata_scsi_user_scan(struct Scsi_Host
*shost
, unsigned int channel
,
4830 unsigned int id
, u64 lun
)
4832 struct ata_port
*ap
= ata_shost_to_port(shost
);
4833 unsigned long flags
;
4836 if (!ap
->ops
->error_handler
)
4839 if (lun
!= SCAN_WILD_CARD
&& lun
)
4842 if (!sata_pmp_attached(ap
)) {
4843 if (channel
!= SCAN_WILD_CARD
&& channel
)
4847 if (id
!= SCAN_WILD_CARD
&& id
)
4852 spin_lock_irqsave(ap
->lock
, flags
);
4854 if (devno
== SCAN_WILD_CARD
) {
4855 struct ata_link
*link
;
4857 ata_for_each_link(link
, ap
, EDGE
) {
4858 struct ata_eh_info
*ehi
= &link
->eh_info
;
4859 ehi
->probe_mask
|= ATA_ALL_DEVICES
;
4860 ehi
->action
|= ATA_EH_RESET
;
4863 struct ata_device
*dev
= ata_find_dev(ap
, devno
);
4866 struct ata_eh_info
*ehi
= &dev
->link
->eh_info
;
4867 ehi
->probe_mask
|= 1 << dev
->devno
;
4868 ehi
->action
|= ATA_EH_RESET
;
4874 ata_port_schedule_eh(ap
);
4875 spin_unlock_irqrestore(ap
->lock
, flags
);
4876 ata_port_wait_eh(ap
);
4878 spin_unlock_irqrestore(ap
->lock
, flags
);
4884 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
4885 * @work: Pointer to ATA port to perform scsi_rescan_device()
4887 * After ATA pass thru (SAT) commands are executed successfully,
4888 * libata need to propagate the changes to SCSI layer.
4891 * Kernel thread context (may sleep).
4893 void ata_scsi_dev_rescan(struct work_struct
*work
)
4895 struct ata_port
*ap
=
4896 container_of(work
, struct ata_port
, scsi_rescan_task
);
4897 struct ata_link
*link
;
4898 struct ata_device
*dev
;
4899 unsigned long flags
;
4901 mutex_lock(&ap
->scsi_scan_mutex
);
4902 spin_lock_irqsave(ap
->lock
, flags
);
4904 ata_for_each_link(link
, ap
, EDGE
) {
4905 ata_for_each_dev(dev
, link
, ENABLED
) {
4906 struct scsi_device
*sdev
= dev
->sdev
;
4910 if (scsi_device_get(sdev
))
4913 spin_unlock_irqrestore(ap
->lock
, flags
);
4914 scsi_rescan_device(&(sdev
->sdev_gendev
));
4915 scsi_device_put(sdev
);
4916 spin_lock_irqsave(ap
->lock
, flags
);
4920 spin_unlock_irqrestore(ap
->lock
, flags
);
4921 mutex_unlock(&ap
->scsi_scan_mutex
);
4925 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
4926 * @host: ATA host container for all SAS ports
4927 * @port_info: Information from low-level host driver
4928 * @shost: SCSI host that the scsi device is attached to
4931 * PCI/etc. bus probe sem.
4934 * ata_port pointer on success / NULL on failure.
4937 struct ata_port
*ata_sas_port_alloc(struct ata_host
*host
,
4938 struct ata_port_info
*port_info
,
4939 struct Scsi_Host
*shost
)
4941 struct ata_port
*ap
;
4943 ap
= ata_port_alloc(host
);
4948 ap
->lock
= &host
->lock
;
4949 ap
->pio_mask
= port_info
->pio_mask
;
4950 ap
->mwdma_mask
= port_info
->mwdma_mask
;
4951 ap
->udma_mask
= port_info
->udma_mask
;
4952 ap
->flags
|= port_info
->flags
;
4953 ap
->ops
= port_info
->port_ops
;
4954 ap
->cbl
= ATA_CBL_SATA
;
4958 EXPORT_SYMBOL_GPL(ata_sas_port_alloc
);
4961 * ata_sas_port_start - Set port up for dma.
4962 * @ap: Port to initialize
4964 * Called just after data structures for each port are
4967 * May be used as the port_start() entry in ata_port_operations.
4970 * Inherited from caller.
4972 int ata_sas_port_start(struct ata_port
*ap
)
4975 * the port is marked as frozen at allocation time, but if we don't
4976 * have new eh, we won't thaw it
4978 if (!ap
->ops
->error_handler
)
4979 ap
->pflags
&= ~ATA_PFLAG_FROZEN
;
4982 EXPORT_SYMBOL_GPL(ata_sas_port_start
);
4985 * ata_port_stop - Undo ata_sas_port_start()
4986 * @ap: Port to shut down
4988 * May be used as the port_stop() entry in ata_port_operations.
4991 * Inherited from caller.
4994 void ata_sas_port_stop(struct ata_port
*ap
)
4997 EXPORT_SYMBOL_GPL(ata_sas_port_stop
);
5000 * ata_sas_async_probe - simply schedule probing and return
5001 * @ap: Port to probe
5003 * For batch scheduling of probe for sas attached ata devices, assumes
5004 * the port has already been through ata_sas_port_init()
5006 void ata_sas_async_probe(struct ata_port
*ap
)
5008 __ata_port_probe(ap
);
5010 EXPORT_SYMBOL_GPL(ata_sas_async_probe
);
5012 int ata_sas_sync_probe(struct ata_port
*ap
)
5014 return ata_port_probe(ap
);
5016 EXPORT_SYMBOL_GPL(ata_sas_sync_probe
);
5020 * ata_sas_port_init - Initialize a SATA device
5021 * @ap: SATA port to initialize
5024 * PCI/etc. bus probe sem.
5027 * Zero on success, non-zero on error.
5030 int ata_sas_port_init(struct ata_port
*ap
)
5032 int rc
= ap
->ops
->port_start(ap
);
5036 ap
->print_id
= atomic_inc_return(&ata_print_id
);
5039 EXPORT_SYMBOL_GPL(ata_sas_port_init
);
5041 int ata_sas_tport_add(struct device
*parent
, struct ata_port
*ap
)
5043 return ata_tport_add(parent
, ap
);
5045 EXPORT_SYMBOL_GPL(ata_sas_tport_add
);
5047 void ata_sas_tport_delete(struct ata_port
*ap
)
5049 ata_tport_delete(ap
);
5051 EXPORT_SYMBOL_GPL(ata_sas_tport_delete
);
5054 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
5055 * @ap: SATA port to destroy
5059 void ata_sas_port_destroy(struct ata_port
*ap
)
5061 if (ap
->ops
->port_stop
)
5062 ap
->ops
->port_stop(ap
);
5065 EXPORT_SYMBOL_GPL(ata_sas_port_destroy
);
5068 * ata_sas_slave_configure - Default slave_config routine for libata devices
5069 * @sdev: SCSI device to configure
5070 * @ap: ATA port to which SCSI device is attached
5076 int ata_sas_slave_configure(struct scsi_device
*sdev
, struct ata_port
*ap
)
5078 ata_scsi_sdev_config(sdev
);
5079 ata_scsi_dev_config(sdev
, ap
->link
.device
);
5082 EXPORT_SYMBOL_GPL(ata_sas_slave_configure
);
5085 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
5086 * @cmd: SCSI command to be sent
5087 * @ap: ATA port to which the command is being sent
5090 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
5094 int ata_sas_queuecmd(struct scsi_cmnd
*cmd
, struct ata_port
*ap
)
5098 ata_scsi_dump_cdb(ap
, cmd
);
5100 if (likely(ata_dev_enabled(ap
->link
.device
)))
5101 rc
= __ata_scsi_queuecmd(cmd
, ap
->link
.device
);
5103 cmd
->result
= (DID_BAD_TARGET
<< 16);
5104 cmd
->scsi_done(cmd
);
5108 EXPORT_SYMBOL_GPL(ata_sas_queuecmd
);
5110 int ata_sas_allocate_tag(struct ata_port
*ap
)
5112 unsigned int max_queue
= ap
->host
->n_tags
;
5113 unsigned int i
, tag
;
5115 for (i
= 0, tag
= ap
->sas_last_tag
+ 1; i
< max_queue
; i
++, tag
++) {
5116 tag
= tag
< max_queue
? tag
: 0;
5118 /* the last tag is reserved for internal command. */
5119 if (ata_tag_internal(tag
))
5122 if (!test_and_set_bit(tag
, &ap
->sas_tag_allocated
)) {
5123 ap
->sas_last_tag
= tag
;
5130 void ata_sas_free_tag(unsigned int tag
, struct ata_port
*ap
)
5132 clear_bit(tag
, &ap
->sas_tag_allocated
);